Bump versions

Redstone behaviour tweaks

.github/ISSUE_TEMPLATE/bug_report.md

@@ -6,11 +6,10 @@ about: Report some misbehaviour in the mod
 
 <!--
 ## Before reporting
- - Search for the bug both here and [on the ComputerCraft issues page](https://github.com/dan200/ComputerCraft/issues?utf8=%E2%9C%93&q=is%3Aissue+)
- - If possible, try to reproduce on vanilla ComputerCraft. If it still occurs, [report on the ComputerCraft repo](https://github.com/dan200/ComputerCraft/issues/new) instead.
+ - Search for the bug on the issue tracker. Make sure to look at closed issues too!
 -->
 
 ## Useful information to include:
  - Minecraft version
  - CC: Tweaked version
- - Detailed reproduction steps!** Sometimes I can spot a bug pretty easily, but often it's much more obscure. Anything you can give which will help reproduce it means it'll get fixed quicker.
+ - Detailed reproduction steps: sometimes I can spot a bug pretty easily, but often it's much more obscure. The more information I have to help reproduce it, the quicker it'll get fixed.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -6,10 +6,9 @@ about: Suggest an idea or improvement
 
 <!--
 ## Before reporting
- - Search for the suggestion both here and [on the ComputerCraft issues page](https://github.com/dan200/ComputerCraft/issues?utf8=%E2%9C%93&q=is%3Aissue+). It's possible someone's suggested it before!
- - Unless something is specific to CC:Tweaked, try to [suggest them on the ComputerCraft repo](https://github.com/dan200/ComputerCraft/issues/new). There's a lot more people watching it, so it allows the wider community to contribute.
+ - Search for the suggestion here. It's possible someone's suggested it before!
 -->
 
 ## Useful information to include:
- - Explanation of how the feature/change chould work.
- - Some rationale/use case for a feature. I'd like to keep CC:T as minimal
+ - Explanation of how the feature/change should work.
+ - Some rationale/use case for a feature. I'd like to keep CC:T as minimal as possible, so I like have a solid justification for each feature.

.github/pull_request_template.md

@@ -1,9 +0,0 @@
-<!--
-Unless this feature is specific to CC:Tweaked, try to [target the original ComputerCraft repo](https://github.com/dan200/ComputerCraft/) instead. There's a lot more people watching it, so it allows the wider community to contribute.
--->
-
-## Useful information to include:
- - Brief explanation of the changes you've made.
- - Rationale of why this change has been made/reasoning behind it.
-
-The more information you can provide, the easier it is to review something now _and_ to see why a change was made, when the code needs updating in the future.

LICENSE-luaj

@@ -1,19 +0,0 @@
-Copyright (c) 2007 LuaJ. All rights reserved.
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.

README.md

@@ -1,35 +1,35 @@
 # ![CC: Tweaked](logo.png)
 [![Build Status](https://travis-ci.org/SquidDev-CC/CC-Tweaked.svg?branch=master)](https://travis-ci.org/SquidDev-CC/CC-Tweaked)
 
-CC: Tweaked is a fork of ComputerCraft which aims to provide earlier access to the more experimental and in-development
-features of the mod. For a more stable experience, I recommend checking out the
-[original mod](https://github.com/dan200/ComputerCraft).
+CC: Tweaked is a fork of [ComputerCraft](https://github.com/dan200/ComputerCraft), adding programmable computers,
+turtles and more to Minecraft.
 
 ## What?
-CC: Tweaked (or CC:T for short) does not aim to create a competing fork of ComputerCraft, nor am I planning to take it
-in in a vastly different direction to the original mod. In fact, CC:T aims to be a nurturing ground for various
-features, with a pull request against the original mod being the end goal.
+ComputerCraft has always held a fond place in my heart: it's the mod which really got me into Minecraft, and it's the
+mod which has kept me playing it for many years. However, development of the original mod has slowed, as the original
+developers have had less time to work on the mod, and moved onto other projects and commitments.
 
-CC:T also includes many pull requests from the community which have not yet been merged, offering a large number
-of additional bug fixes and features over the original mod.
+CC:Tweaked (or CC:T for short) is an attempt to continue ComputerCraft's legacy. It's not intended to be a competitor
+to CC, nor do I want to take it in a vastly different direction to the original mod. Instead, CC:T focuses on making the
+ComputerCraft experience as _solid_ as possible, ironing out any wrinkles that may have developed over time.
 
 ## Features
-CC: Tweaked contains all the features of the latest alpha, as well as numerous fixes, performance improvements and
-several additional features. I'd recommend checking out [the releases page](https://github.com/SquidDev-CC/CC-Tweaked/releases)
-to see the full changes, but here's a couple of the more interesting changes:
+CC: Tweaked contains all the features of the latest version of ComputerCraft, as well as numerous fixes, performance
+improvements and several nifty additions. I'd recommend checking out [the releases page](https://github.com/SquidDev-CC/CC-Tweaked/releases)
+to see the full set of changes, but here's a couple of the more interesting additions:
 
- - Replace LuaJ with Cobalt.
- - Allow running multiple computers at the same time.
- - Websocket support in the HTTP library.
- - Wired modems and cables act more like multiparts.
- - Add map-like rendering for pocket computers and printed pages/books.
- - Adds the `/computercraft` command, offering various diagnostic tools for server owners. This allows operators to
-   track which computers are hogging resources, turn on and shutdown multiple computers at once and interact with
-   computers remotely.
- - Add full-block wired modems, allowing one to wrap non-solid peripherals (such as turtles, or chests if Plethora is
+ - Improvements to the `http` library, including websockets, support for other HTTP methods (`PUT`, `DELETE`, etc...)
+   and configurable limits on HTTP usage.
+ - Full-block wired modems, allowing one to wrap non-solid peripherals (such as turtles, or chests if Plethora is
    installed).
- - Extended binary file handles. They support file seeking, and reading new lines, allowing full (and accurate)
-   emulation of the standard Lua `io` library.
+ - Pocket computers can be held like maps, allowing you to view the screen without entering a GUI.
+ - Printed pages and books can be placed in item frames and held like maps.
+ - Several profiling and administration tools for server owners, via the `/computercraft` command. This allows operators
+   to track which computers are hogging resources, turn on and shutdown multiple computers at once and interact with
+   computers remotely.
+ - Closer emulation of standard Lua, adding the `debug` and `io` libraries. This also enables seeking within binary
+   files, meaning you don't need to read large files into memory.
+ - Allow running multiple computers on multiple threads, reducing latency on worlds with many computers.
 
 ## Relation to CCTweaks?
 This mod has nothing to do with CCTweaks, though there is no denying the name is a throwback to it. That being said,
@@ -37,13 +37,30 @@ several features have been included, such as full block modems, the Cobalt runti
 computers.
 
 ## Contributing
-Any contribution is welcome, be that using the mod, reporting bugs or contributing code. If you do wish to contribute
-code, do consider submitting it to the ComputerCraft repository first.
-
-That being said, in order to start helping develop CC:T, you'll need to follow these steps:
+Any contribution is welcome, be that using the mod, reporting bugs or contributing code. In order to start helping
+develop CC:T, you'll need to follow these steps:
 
  - **Clone the repository:** `git clone https://github.com/SquidDev-CC/CC-Tweaked.git && cd CC-Tweaked`
  - **Setup Forge:** `./gradlew setupDecompWorkspace`
  - **Test your changes:** `./gradlew runClient` (or run the `GradleStart` class from your IDE).
 
 If you want to run CC:T in a normal Minecraft instance, run `./gradlew build` and copy the `.jar` from `build/libs`.
+
+## Using
+If you want to depend on CC:Tweaked, we have a maven repo. However, you should be wary that some functionality is only
+exposed by CC:T's API and not vanilla ComputerCraft. If you wish to support all variations of ComputerCraft, I recommend
+using [cc.crzd.me's maven](https://cc.crzd.me/maven/) instead.
+
+```groovy
+dependencies {
+  maven { url 'https://squiddev.cc/maven/' }
+}
+
+dependencies {
+  implementation "org.squiddev:cc-tweaked-${mc_version}:${cct_version}"
+}
+```
+
+You should also be careful to only use classes within the `dan200.computercraft.api` package. Non-API classes are
+subject to change at any point. If you depend on functionality outside the API, file an issue, and we can look into
+exposing more features.

build.gradle

@@ -1,57 +1,47 @@
-
-// For those who want the bleeding edge
 buildscript {
-    repositories {
-        jcenter()
-        maven {
-            name = "forge"
-            url = "http://files.minecraftforge.net/maven"
-        }
-    }
     dependencies {
-        classpath 'net.minecraftforge.gradle:ForgeGradle:2.3-SNAPSHOT'
-        classpath 'org.ajoberstar:gradle-git:1.6.0'
+        classpath 'com.google.code.gson:gson:2.8.1'
+        classpath 'net.sf.proguard:proguard-gradle:6.1.0beta2'
+        classpath 'org.ajoberstar.grgit:grgit-gradle:3.0.0'
     }
 }
 
 plugins {
-    id 'com.matthewprenger.cursegradle' version '1.0.10'
+    id 'fabric-loom' version '0.2.2-SNAPSHOT'
+    id 'com.matthewprenger.cursegradle' version '1.2.0'
+    id "com.github.breadmoirai.github-release" version "2.2.4"
 }
 
-apply plugin: 'net.minecraftforge.gradle.forge'
 apply plugin: 'org.ajoberstar.grgit'
 apply plugin: 'maven-publish'
 apply plugin: 'maven'
 
-version = "1.80pr1.13"
+version = mod_version
+
 group = "org.squiddev"
-archivesBaseName = "cc-tweaked"
+archivesBaseName = "cc-tweaked-${mc_version}"
 
 minecraft {
-    version = "1.12.2-14.23.4.2749"
-    runDir = "run"
-    replace '${version}', project.version
-
-    // the mappings can be changed at any time, and must be in the following format.
-    // snapshot_YYYYMMDD   snapshot are built nightly.
-    // stable_#            stables are built at the discretion of the MCP team.
-    // Use non-default mappings at your own risk. they may not allways work.
-    // simply re-run your setup task after changing the mappings to update your workspace.
-    mappings = "snapshot_20180724"
-    // makeObfSourceJar = false // an Srg named sources jar is made by default. uncomment this to disable.
 }
 
 repositories {
+    mavenCentral()
     maven {
-        name = "JEI"
-        url  = "http://dvs1.progwml6.com/files/maven"
+        name "JEI"
+        url  "http://dvs1.progwml6.com/files/maven"
     }
     maven {
-        name = "squiddev"
-        url = "https://dl.bintray.com/squiddev/maven"
+        name "SquidDev"
+        url "https://squiddev.cc/maven"
+    }
+    ivy {
+        name "Charset"
+        artifactPattern "https://asie.pl/files/mods/Charset/LibOnly/[module]-[revision](-[classifier]).[ext]"
+    }
+    maven {
+        name "Amadornes"
+        url "http://maven.amadornes.com/"
     }
-
-    ivy { artifactPattern "https://asie.pl/files/mods/Charset/LibOnly/[module]-[revision](-[classifier]).[ext]" }
 }
 
 configurations {
@@ -61,18 +51,44 @@ configurations {
 }
 
 dependencies {
-    deobfProvided "mezz.jei:jei_1.12.2:4.8.5.159:api"
-    deobfProvided "pl.asie:Charset-Lib:0.5.4.6"
+    minecraft "com.mojang:minecraft:${mc_version}"
+    mappings "net.fabricmc:yarn:${mc_version}+build.${mappings_version}"
+    modCompile "net.fabricmc:fabric-loader:0.4.2+build.132"
+    modCompile "net.fabricmc:fabric:0.2.7+build.126"
 
-    runtime "mezz.jei:jei_1.12.2:4.8.5.159"
+    /*
+    modCompile "net.fabricmc:fabric-lib:0.1.0"
+    modCompile "net.fabricmc:fabric-networking:0.1.0"
+    modCompile "net.fabricmc:fabric-networking-blockentity:0.1.0"
+    modCompile "net.fabricmc:fabric-object-builders:0.1.0"
+    modCompile "net.fabricmc:fabric-containers:0.1.0"
+    modCompile "net.fabricmc:fabric-item-groups:0.1.0"
+    modCompile "net.fabricmc:fabric-client-registries:0.1.0"
+    modCompile "net.fabricmc:fabric-commands:0.1.0"
+    modCompile "net.fabricmc:fabric-events-lifecycle:0.1.0"
+    modCompile "net.fabricmc:fabric-events-interaction:0.1.0"
+    modCompile "net.fabricmc:fabric-resource-loader:0.1.0"
+    */
 
-    shade 'org.squiddev:Cobalt:0.4.0'
+    implementation 'com.google.code.findbugs:jsr305:3.0.2'
 
-    testCompile 'junit:junit:4.11'
+    shade 'org.squiddev:Cobalt:0.5.0-SNAPSHOT'
+    shade 'javax.vecmath:vecmath:1.5.2'
+
+    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.1.0'
+    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.1.0'
 
     deployerJars "org.apache.maven.wagon:wagon-ssh:3.0.0"
 }
 
+sourceSets {
+    main {
+        java {
+            exclude 'dan200/computercraft/shared/integration'
+        }
+    }
+}
+
 javadoc {
     include "dan200/computercraft/api/**/*.java"
 }
@@ -81,57 +97,161 @@ jar {
     dependsOn javadoc
 
     manifest {
-        attributes('FMLAT': 'computercraft_at.cfg')
+        attributes(["Specification-Title": "computercraft",
+                    "Specification-Vendor": "SquidDev",
+                    "Specification-Version": "25.0",
+                    "Implementation-Title": "CC: Tweaked",
+                    "Implementation-Version": "${mod_version}",
+                    "Implementation-Vendor" :"SquidDev",
+                    "Implementation-Timestamp": new Date().format("yyyy-MM-dd'T'HH:mm:ssZ")])
     }
 
-    into("docs", { from (javadoc.destinationDir) })
-
-    into("api", { from (sourceSets.main.allSource) {
+    from (sourceSets.main.allSource) {
         include "dan200/computercraft/api/**/*.java"
-    }})
+    }
 
     from configurations.shade.collect { it.isDirectory() ? it : zipTree(it) }
 }
 
+import java.nio.charset.StandardCharsets
+import java.nio.file.*
+import java.util.zip.*
+
+import com.google.gson.GsonBuilder
+import com.google.gson.JsonElement
 import org.ajoberstar.grgit.Grgit
+import proguard.gradle.ProGuardTask
 
-processResources {
-    inputs.property "version", project.version
-    inputs.property "mcversion", project.minecraft.version
+task proguard(type: ProGuardTask, dependsOn: jar) {
+    description "Removes unused shadowed classes from the jar"
+    group "compact"
 
-    def grgit = Grgit.open(dir: '.')
-    inputs.property "commithash", grgit.head().id
+    injars jar.archivePath
+    outjars "${jar.archivePath.absolutePath.replace(".jar", "")}-min.jar"
 
-    def blacklist = ['GitHub', 'dan200', 'Daniel Ratcliffe']
-    Set<String> contributors = []
-
-    grgit.log().each {
-        if (!blacklist.contains(it.author.name)) contributors.add(it.author.name)
-        if (!blacklist.contains(it.committer.name)) contributors.add(it.committer.name)
+    // Add the main runtime jar and all non-shadowed dependencies
+    libraryjars "${System.getProperty('java.home')}/lib/rt.jar"
+    doFirst {
+        sourceSets.main.compileClasspath
+            .filter { !it.name.contains("Cobalt") }
+            .each { libraryjars it }
     }
 
-    from(sourceSets.main.resources.srcDirs) {
-        include 'mcmod.info'
-        include 'assets/computercraft/lua/rom/help/credits.txt'
+    // We want to avoid as much obfuscation as possible. We're only doing this to shrink code size.
+    dontobfuscate; dontoptimize; keepattributes; keepparameternames
 
-        expand 'version':project.version,
-               'mcversion':project.minecraft.version,
-               'gitcontributors':contributors.sort(false, String.CASE_INSENSITIVE_ORDER).join('\n')
-    }
+    // Proguard will remove directories by default, but that breaks JarMount.
+    keepdirectories 'assets/computercraft/lua**'
 
-    from(sourceSets.main.resources.srcDirs) {
-        exclude 'mcmod.info'
-        exclude 'assets/computercraft/lua/rom/help/credits.txt'
+    // Preserve ComputerCraft classes - we only want to strip shadowed files.
+    keep 'class dan200.computercraft.** { *; }'
+
+    // Preserve the constructors in Cobalt library class, as we init them via reflection
+    keepclassmembers 'class org.squiddev.cobalt.lib.** { <init>(...); }'
+
+    // LWJGL and Apache bundle Java 9 versions, which is great, but rather breaks Proguard
+    dontwarn 'module-info'
+    dontwarn 'org.apache.**,org.lwjgl.**'
+}
+
+task proguardMove(dependsOn: proguard) {
+    description "Replace the original jar with the minified version"
+    group "compact"
+
+    doLast {
+        Files.move(
+            file("${jar.archivePath.absolutePath.replace(".jar", "")}-min.jar").toPath(),
+            file(jar.archivePath).toPath(),
+            StandardCopyOption.REPLACE_EXISTING
+        )
     }
 }
 
 
+
+processResources {
+    inputs.property "version", mod_version
+    inputs.property "mcversion", mc_version
+
+    def hash = 'none'
+    Set<String> contributors = []
+    try {
+        def grgit = Grgit.open(dir: '.')
+        hash = grgit.head().id
+
+        def blacklist = ['GitHub', 'dan200', 'Daniel Ratcliffe']
+        grgit.log().each {
+            if (!blacklist.contains(it.author.name)) contributors.add(it.author.name)
+            if (!blacklist.contains(it.committer.name)) contributors.add(it.committer.name)
+        }
+    } catch(Exception ignored) { }
+
+    inputs.property "commithash", hash
+
+    from(sourceSets.main.resources.srcDirs) {
+        include 'fabric.mods.json'
+        include 'data/computercraft/lua/rom/help/credits.txt'
+
+        expand 'version': mod_version,
+               'mcversion': mc_version,
+               'gitcontributors': contributors.sort(false, String.CASE_INSENSITIVE_ORDER).join('\n')
+    }
+
+    from(sourceSets.main.resources.srcDirs) {
+        exclude 'fabric.mods.json'
+        exclude 'data/computercraft/lua/rom/help/credits.txt'
+    }
+}
+
+task compressJson(dependsOn: jar) {
+    group "compact"
+    description "Minifies all JSON files, stripping whitespace"
+
+    def jarPath = file(jar.archivePath)
+
+    def tempPath = File.createTempFile("input", ".jar", temporaryDir)
+    tempPath.deleteOnExit()
+
+    def gson = new GsonBuilder().create()
+
+    doLast {
+        // Copy over all files in the current jar to the new one, running json files from GSON. As pretty printing
+        // is turned off, they should be minified.
+        new ZipFile(jarPath).withCloseable { inJar ->
+            new ZipOutputStream(new BufferedOutputStream(new FileOutputStream(tempPath))).withCloseable { outJar ->
+                inJar.entries().each { entry ->
+                    if(entry.directory) {
+                        outJar.putNextEntry(entry)
+                    } else if(!entry.name.endsWith(".json")) {
+                        outJar.putNextEntry(entry)
+                        inJar.getInputStream(entry).withCloseable { outJar << it }
+                    } else {
+                        ZipEntry newEntry = new ZipEntry(entry.name)
+                        newEntry.setTime(entry.time)
+                        outJar.putNextEntry(newEntry)
+
+                        def element = inJar.getInputStream(entry).withCloseable { gson.fromJson(it.newReader("UTF8"), JsonElement.class) }
+                        outJar.write(gson.toJson(element).getBytes(StandardCharsets.UTF_8))
+                    }
+                }
+
+            }
+        }
+
+        // And replace the original jar again
+        Files.move(tempPath.toPath(), jarPath.toPath(), StandardCopyOption.REPLACE_EXISTING)
+    }
+}
+
+assemble.dependsOn compressJson
+
 curseforge {
     apiKey = project.hasProperty('curseForgeApiKey') ? project.curseForgeApiKey : ''
     project {
         id = '282001'
-        releaseType = 'beta'
-        changelog = "Release notes can be found on the GitHub repository (https://github.com/SquidDev-CC/CC-Tweaked/releases/tag/v${project.version})."
+        addGameVersion '1.14-Snapshot'
+        releaseType = 'alpha'
+        changelog = "Release notes can be found on the GitHub repository (https://github.com/SquidDev-CC/CC-Tweaked/releases/tag/v${mc_version}-${mod_version})."
     }
 }
 
@@ -139,7 +259,7 @@ publishing {
     publications {
         mavenJava(MavenPublication) {
             from components.java
-            artifact sourceJar
+            // artifact sourceJar
         }
     }
 }
@@ -159,22 +279,22 @@ uploadArchives {
                 pom.project {
                     name 'CC: Tweaked'
                     packaging 'jar'
-                    description 'A fork of ComputerCraft which aims to provide earlier access to the more experimental and in-development features of the mod.'
+                    description 'CC: Tweaked is a fork of ComputerCraft, adding programmable computers, turtles and more to Minecraft.'
                     url 'https://github.com/SquidDev-CC/CC-Tweaked'
 
                     scm {
-                        url 'https://github.com/dan200/ComputerCraft.git'
+                        url 'https://github.com/SquidDev-CC/CC-Tweaked.git'
                     }
 
                     issueManagement {
                         system 'github'
-                        url 'https://github.com/dan200/ComputerCraft/issues'
+                        url 'https://github.com/SquidDev-CC/CC-Tweaked/issues'
                     }
 
                     licenses {
                         license {
                             name 'ComputerCraft Public License, Version 1.0'
-                            url 'https://github.com/dan200/ComputerCraft/blob/master/LICENSE'
+                            url 'https://github.com/SquidDev-CC/CC-Tweaked/blob/master/LICENSE'
                             distribution 'repo'
                         }
                     }
@@ -188,11 +308,37 @@ uploadArchives {
     }
 }
 
-gradle.projectsEvaluated {
-    tasks.withType(JavaCompile) {
-        options.compilerArgs << "-Xlint"
+githubRelease {
+    token project.hasProperty('githubApiKey') ? project.githubApiKey : ''
+    owner 'SquidDev-CC'
+    repo 'CC-Tweaked'
+    targetCommitish "mc-1.14-fabric" // TODO: Pull from GrGit
+
+    tagName "v${mc_version}-${mod_version}"
+    releaseName "[${mc_version}] ${mod_version}"
+    body ''
+    prerelease true
+
+    releaseAssets.from(jar.archivePath)
+}
+
+task uploadAll(dependsOn: [uploadArchives, "curseforge", "githubRelease"]) {
+    group "upload"
+    description "Uploads to all repositories (Maven, Curse, GitHub release)"
+}
+
+test {
+    useJUnitPlatform()
+    testLogging {
+        events "passed", "skipped", "failed"
+    }
+}
+
+gradle.projectsEvaluated {
+    remapJar.dependsOn proguardMove
+
+    tasks.withType(JavaCompile) {
+        options.compilerArgs << "-Xlint" << "-Xlint:-processing" // Causes Forge build to fail << "-Werror"
     }
 }
 
-runClient.outputs.upToDateWhen { false }
-runServer.outputs.upToDateWhen { false }

gradle.properties

@@ -0,0 +1,6 @@
+# Mod properties
+mod_version=1.82.3
+
+# Minecraft properties
+mc_version=1.14
+mappings_version=1

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.10-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.3-bin.zip

settings.gradle

@@ -1 +1,12 @@
-rootProject.name = 'cc-tweaked'
+pluginManagement {
+    repositories {
+        jcenter()
+        maven {
+            name = 'Fabric'
+            url = 'https://maven.fabricmc.net/'
+        }
+        gradlePluginPortal()
+    }
+}
+
+rootProject.name = "cc-tweaked-${mc_version}-fabric"

src/main/java/dan200/computercraft/ComputerCraft.java

@@ -7,112 +7,50 @@
 package dan200.computercraft;
 
 import dan200.computercraft.api.filesystem.IMount;
-import dan200.computercraft.api.filesystem.IWritableMount;
-import dan200.computercraft.api.lua.ILuaAPIFactory;
-import dan200.computercraft.api.media.IMedia;
-import dan200.computercraft.api.media.IMediaProvider;
-import dan200.computercraft.api.network.IPacketNetwork;
-import dan200.computercraft.api.network.wired.IWiredElement;
-import dan200.computercraft.api.network.wired.IWiredNode;
-import dan200.computercraft.api.peripheral.IPeripheral;
-import dan200.computercraft.api.peripheral.IPeripheralProvider;
-import dan200.computercraft.api.permissions.ITurtlePermissionProvider;
-import dan200.computercraft.api.pocket.IPocketUpgrade;
-import dan200.computercraft.api.redstone.IBundledRedstoneProvider;
-import dan200.computercraft.api.turtle.ITurtleUpgrade;
 import dan200.computercraft.api.turtle.event.TurtleAction;
+import dan200.computercraft.client.proxy.ComputerCraftProxyClient;
 import dan200.computercraft.core.apis.AddressPredicate;
-import dan200.computercraft.core.apis.ApiFactories;
 import dan200.computercraft.core.apis.http.websocket.Websocket;
-import dan200.computercraft.core.filesystem.ComboMount;
-import dan200.computercraft.core.filesystem.FileMount;
-import dan200.computercraft.core.filesystem.FileSystemMount;
-import dan200.computercraft.core.terminal.Terminal;
-import dan200.computercraft.core.tracking.Tracking;
-import dan200.computercraft.shared.*;
-import dan200.computercraft.shared.computer.blocks.BlockCommandComputer;
+import dan200.computercraft.core.filesystem.ResourceMount;
 import dan200.computercraft.shared.computer.blocks.BlockComputer;
-import dan200.computercraft.shared.computer.blocks.TileComputer;
 import dan200.computercraft.shared.computer.core.ClientComputerRegistry;
-import dan200.computercraft.shared.computer.core.ComputerFamily;
-import dan200.computercraft.shared.computer.core.ServerComputer;
 import dan200.computercraft.shared.computer.core.ServerComputerRegistry;
-import dan200.computercraft.shared.media.items.ItemDiskExpanded;
-import dan200.computercraft.shared.media.items.ItemDiskLegacy;
+import dan200.computercraft.shared.computer.items.ItemComputer;
+import dan200.computercraft.shared.media.items.ItemDisk;
 import dan200.computercraft.shared.media.items.ItemPrintout;
 import dan200.computercraft.shared.media.items.ItemTreasureDisk;
-import dan200.computercraft.shared.peripheral.common.BlockPeripheral;
-import dan200.computercraft.shared.peripheral.diskdrive.TileDiskDrive;
+import dan200.computercraft.shared.peripheral.diskdrive.BlockDiskDrive;
 import dan200.computercraft.shared.peripheral.modem.wired.BlockCable;
 import dan200.computercraft.shared.peripheral.modem.wired.BlockWiredModemFull;
-import dan200.computercraft.shared.peripheral.modem.wireless.BlockAdvancedModem;
-import dan200.computercraft.shared.peripheral.modem.wireless.WirelessNetwork;
-import dan200.computercraft.shared.peripheral.printer.TilePrinter;
+import dan200.computercraft.shared.peripheral.modem.wired.ItemBlockCable;
+import dan200.computercraft.shared.peripheral.modem.wireless.BlockWirelessModem;
+import dan200.computercraft.shared.peripheral.monitor.BlockMonitor;
+import dan200.computercraft.shared.peripheral.printer.BlockPrinter;
+import dan200.computercraft.shared.peripheral.speaker.BlockSpeaker;
 import dan200.computercraft.shared.pocket.items.ItemPocketComputer;
 import dan200.computercraft.shared.pocket.peripherals.PocketModem;
 import dan200.computercraft.shared.pocket.peripherals.PocketSpeaker;
-import dan200.computercraft.shared.proxy.ICCTurtleProxy;
-import dan200.computercraft.shared.proxy.IComputerCraftProxy;
+import dan200.computercraft.shared.proxy.ComputerCraftProxyCommon;
 import dan200.computercraft.shared.turtle.blocks.BlockTurtle;
-import dan200.computercraft.shared.turtle.blocks.TileTurtle;
+import dan200.computercraft.shared.turtle.items.ItemTurtle;
 import dan200.computercraft.shared.turtle.upgrades.*;
-import dan200.computercraft.shared.util.CreativeTabMain;
-import dan200.computercraft.shared.util.IDAssigner;
-import dan200.computercraft.shared.util.IoUtil;
-import dan200.computercraft.shared.wired.CapabilityWiredElement;
-import dan200.computercraft.shared.wired.WiredNode;
-import net.minecraft.entity.player.EntityPlayer;
-import net.minecraft.entity.player.EntityPlayerMP;
-import net.minecraft.item.ItemStack;
-import net.minecraft.server.MinecraftServer;
-import net.minecraft.tileentity.TileEntity;
-import net.minecraft.util.EnumFacing;
-import net.minecraft.util.EnumHand;
-import net.minecraft.util.math.BlockPos;
-import net.minecraft.world.IBlockAccess;
-import net.minecraft.world.World;
-import net.minecraftforge.fml.common.FMLCommonHandler;
-import net.minecraftforge.fml.common.Mod;
-import net.minecraftforge.fml.common.SidedProxy;
-import net.minecraftforge.fml.common.event.*;
-import net.minecraftforge.fml.common.network.NetworkRegistry;
-import net.minecraftforge.fml.common.network.simpleimpl.IMessage;
-import net.minecraftforge.fml.common.network.simpleimpl.SimpleNetworkWrapper;
-import net.minecraftforge.fml.relauncher.Side;
+import net.fabricmc.api.EnvType;
+import net.fabricmc.api.ModInitializer;
+import net.minecraft.resource.ReloadableResourceManager;
+import net.minecraft.util.Identifier;
+import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
-import java.io.*;
-import java.net.MalformedURLException;
-import java.net.URISyntaxException;
-import java.net.URL;
-import java.nio.file.FileSystem;
-import java.nio.file.FileSystems;
-import java.nio.file.Files;
-import java.util.ArrayList;
+import java.io.IOException;
+import java.io.InputStream;
 import java.util.EnumSet;
-import java.util.List;
-import java.util.ServiceConfigurationError;
-import java.util.zip.ZipEntry;
-import java.util.zip.ZipFile;
+import java.util.concurrent.TimeUnit;
 
-@Mod(
-    modid = ComputerCraft.MOD_ID, name = "CC: Tweaked", version = "${version}",
-    guiFactory = "dan200.computercraft.client.gui.GuiConfigCC$Factory",
-    dependencies = "required:forge@[14.23.4.2746,)"
-)
-public class ComputerCraft
+public final class ComputerCraft implements ModInitializer
 {
     public static final String MOD_ID = "computercraft";
 
-    // GUI IDs
-    public static final int diskDriveGUIID = 100;
-    public static final int computerGUIID = 101;
-    public static final int printerGUIID = 102;
-    public static final int turtleGUIID = 103;
-    // ComputerCraftEdu uses ID 104
-    public static final int printoutGUIID = 105;
-    public static final int pocketComputerGUIID = 106;
-    public static final int viewComputerGUIID = 110;
+    public static final int DATAFIXER_VERSION = 0;
 
     // Configuration options
     public static final String[] DEFAULT_HTTP_WHITELIST = new String[] { "*" };
@@ -130,9 +68,12 @@ public class ComputerCraft
     public static boolean disable_lua51_features = false;
     public static String default_computer_settings = "";
     public static boolean debug_enable = true;
-    public static int computer_threads = 1;
     public static boolean logPeripheralErrors = false;
 
+    public static int computer_threads = 1;
+    public static long maxMainGlobalTime = TimeUnit.MILLISECONDS.toNanos( 10 );
+    public static long maxMainComputerTime = TimeUnit.MILLISECONDS.toNanos( 5 );
+
     public static boolean http_enable = true;
     public static boolean http_websocket_enable = true;
     public static AddressPredicate http_whitelist = new AddressPredicate( DEFAULT_HTTP_WHITELIST );
@@ -169,121 +110,95 @@ public class ComputerCraft
     public static final int terminalHeight_pocketComputer = 20;
 
     // Blocks and Items
-    public static class Blocks
+    public static final class Blocks
     {
-        public static BlockComputer computer;
-        public static BlockPeripheral peripheral;
-        public static BlockCable cable;
-        public static BlockTurtle turtle;
-        public static BlockTurtle turtleExpanded;
+        public static BlockComputer computerNormal;
+        public static BlockComputer computerAdvanced;
+        public static BlockComputer computerCommand;
+
+        public static BlockTurtle turtleNormal;
         public static BlockTurtle turtleAdvanced;
-        public static BlockCommandComputer commandComputer;
-        public static BlockAdvancedModem advancedModem;
+
+        public static BlockSpeaker speaker;
+        public static BlockDiskDrive diskDrive;
+        public static BlockPrinter printer;
+
+        public static BlockMonitor monitorNormal;
+        public static BlockMonitor monitorAdvanced;
+
+        public static BlockWirelessModem wirelessModemNormal;
+        public static BlockWirelessModem wirelessModemAdvanced;
+
         public static BlockWiredModemFull wiredModemFull;
+        public static BlockCable cable;
     }
 
-    public static class Items
+    public static final class Items
     {
-        public static ItemDiskLegacy disk;
-        public static ItemDiskExpanded diskExpanded;
-        public static ItemPrintout printout;
+        public static ItemComputer computerNormal;
+        public static ItemComputer computerAdvanced;
+        public static ItemComputer computerCommand;
+
+        public static ItemPocketComputer pocketComputerNormal;
+        public static ItemPocketComputer pocketComputerAdvanced;
+
+        public static ItemTurtle turtleNormal;
+        public static ItemTurtle turtleAdvanced;
+
+        public static ItemDisk disk;
         public static ItemTreasureDisk treasureDisk;
-        public static ItemPocketComputer pocketComputer;
+
+        public static ItemPrintout printedPage;
+        public static ItemPrintout printedPages;
+        public static ItemPrintout printedBook;
+
+        public static ItemBlockCable.Cable cable;
+        public static ItemBlockCable.WiredModem wiredModem;
     }
 
-    public static class Upgrades
+    public static final class TurtleUpgrades
     {
-        public static TurtleModem wirelessModem;
+        public static TurtleModem wirelessModemNormal;
+        public static TurtleModem wirelessModemAdvanced;
+        public static TurtleSpeaker speaker;
+
         public static TurtleCraftingTable craftingTable;
         public static TurtleSword diamondSword;
         public static TurtleShovel diamondShovel;
         public static TurtleTool diamondPickaxe;
         public static TurtleAxe diamondAxe;
         public static TurtleHoe diamondHoe;
-        public static TurtleModem advancedModem;
-        public static TurtleSpeaker turtleSpeaker;
     }
 
-    public static class PocketUpgrades
+    public static final class PocketUpgrades
     {
-        public static PocketModem wirelessModem;
-        public static PocketModem advancedModem;
-        public static PocketSpeaker pocketSpeaker;
+        public static PocketModem wirelessModemNormal;
+        public static PocketModem wirelessModemAdvanced;
+        public static PocketSpeaker speaker;
     }
 
     // Registries
-    public static ClientComputerRegistry clientComputerRegistry = new ClientComputerRegistry();
-    public static ServerComputerRegistry serverComputerRegistry = new ServerComputerRegistry();
-
-    // Networking
-    public static SimpleNetworkWrapper networkWrapper;
-
-    // Creative
-    public static CreativeTabMain mainCreativeTab;
+    public static final ClientComputerRegistry clientComputerRegistry = new ClientComputerRegistry();
+    public static final ServerComputerRegistry serverComputerRegistry = new ServerComputerRegistry();
 
     // Logging
-    public static Logger log;
-
-    // Peripheral providers. This is still here to ensure compatibility with Plethora and Computronics
-    public static List<IPeripheralProvider> peripheralProviders = new ArrayList<>();
+    public static final Logger log = LogManager.getLogger( MOD_ID );
 
     // Implementation
-    @Mod.Instance( value = ComputerCraft.MOD_ID )
     public static ComputerCraft instance;
 
-    @SidedProxy( clientSide = "dan200.computercraft.client.proxy.ComputerCraftProxyClient", serverSide = "dan200.computercraft.server.proxy.ComputerCraftProxyServer" )
-    public static IComputerCraftProxy proxy;
-
-    @SidedProxy( clientSide = "dan200.computercraft.client.proxy.CCTurtleProxyClient", serverSide = "dan200.computercraft.server.proxy.CCTurtleProxyServer" )
-    public static ICCTurtleProxy turtleProxy;
-
-    @Mod.EventHandler
-    public void preInit( FMLPreInitializationEvent event )
+    public ComputerCraft()
     {
-        log = event.getModLog();
-
-        // Load config
-        Config.load( event.getSuggestedConfigurationFile() );
-
-        // Setup network
-        networkWrapper = NetworkRegistry.INSTANCE.newSimpleChannel( ComputerCraft.MOD_ID );
-
-        proxy.preInit();
-        turtleProxy.preInit();
+        instance = this;
     }
 
-    @Mod.EventHandler
-    public void init( FMLInitializationEvent event )
+    @Override
+    public void onInitialize()
     {
-        proxy.init();
-        turtleProxy.init();
-    }
-
-    @Mod.EventHandler
-    public void onServerStarting( FMLServerStartingEvent event )
-    {
-        proxy.initServer( event.getServer() );
-    }
-
-    @Mod.EventHandler
-    public void onServerStart( FMLServerStartedEvent event )
-    {
-        if( FMLCommonHandler.instance().getEffectiveSide() == Side.SERVER )
+        ComputerCraftProxyCommon.setup();
+        if( net.fabricmc.loader.api.FabricLoader.getInstance().getEnvironmentType() == EnvType.CLIENT )
         {
-            ComputerCraft.serverComputerRegistry.reset();
-            WirelessNetwork.resetNetworks();
-            Tracking.reset();
-        }
-    }
-
-    @Mod.EventHandler
-    public void onServerStopped( FMLServerStoppedEvent event )
-    {
-        if( FMLCommonHandler.instance().getEffectiveSide() == Side.SERVER )
-        {
-            ComputerCraft.serverComputerRegistry.reset();
-            WirelessNetwork.resetNetworks();
-            Tracking.reset();
+            ComputerCraftProxyClient.setup();
         }
     }
 
@@ -292,432 +207,23 @@ public class ComputerCraft
         return "${version}";
     }
 
-    public static void openDiskDriveGUI( EntityPlayer player, TileDiskDrive drive )
+    static IMount createResourceMount( String domain, String subPath )
     {
-        BlockPos pos = drive.getPos();
-        player.openGui( ComputerCraft.instance, ComputerCraft.diskDriveGUIID, player.getEntityWorld(), pos.getX(), pos.getY(), pos.getZ() );
+        ReloadableResourceManager manager = ComputerCraftProxyCommon.getServer().getDataManager();
+        ResourceMount mount = new ResourceMount( domain, subPath, manager );
+        return mount.exists( "" ) ? mount : null;
     }
 
-    public static void openComputerGUI( EntityPlayer player, TileComputer computer )
-    {
-        BlockPos pos = computer.getPos();
-        player.openGui( ComputerCraft.instance, ComputerCraft.computerGUIID, player.getEntityWorld(), pos.getX(), pos.getY(), pos.getZ() );
-    }
-
-    public static void openPrinterGUI( EntityPlayer player, TilePrinter printer )
-    {
-        BlockPos pos = printer.getPos();
-        player.openGui( ComputerCraft.instance, ComputerCraft.printerGUIID, player.getEntityWorld(), pos.getX(), pos.getY(), pos.getZ() );
-    }
-
-    public static void openTurtleGUI( EntityPlayer player, TileTurtle turtle )
-    {
-        BlockPos pos = turtle.getPos();
-        player.openGui( instance, ComputerCraft.turtleGUIID, player.getEntityWorld(), pos.getX(), pos.getY(), pos.getZ() );
-    }
-
-    public static void openPrintoutGUI( EntityPlayer player, EnumHand hand )
-    {
-        player.openGui( ComputerCraft.instance, ComputerCraft.printoutGUIID, player.getEntityWorld(), hand.ordinal(), 0, 0 );
-    }
-
-    public static void openPocketComputerGUI( EntityPlayer player, EnumHand hand )
-    {
-        player.openGui( ComputerCraft.instance, ComputerCraft.pocketComputerGUIID, player.getEntityWorld(), hand.ordinal(), 0, 0 );
-    }
-
-    public static void openComputerGUI( EntityPlayer player, ServerComputer computer )
-    {
-        ComputerFamily family = computer.getFamily();
-        int width = 0, height = 0;
-        Terminal terminal = computer.getTerminal();
-        if( terminal != null )
-        {
-            width = terminal.getWidth();
-            height = terminal.getHeight();
-        }
-
-        // Pack useful terminal information into the various coordinate bits.
-        // These are extracted in ComputerCraftProxyCommon.getClientGuiElement
-        player.openGui( ComputerCraft.instance, ComputerCraft.viewComputerGUIID, player.getEntityWorld(),
-            computer.getInstanceID(), family.ordinal(), (width & 0xFFFF) << 16 | (height & 0xFFFF)
-        );
-    }
-
-    private static File getBaseDir()
-    {
-        return FMLCommonHandler.instance().getMinecraftServerInstance().getDataDirectory();
-    }
-
-    private static File getResourcePackDir()
-    {
-        return new File( getBaseDir(), "resourcepacks" );
-    }
-
-    public static File getWorldDir( World world )
-    {
-        return proxy.getWorldDir( world );
-    }
-
-    public static void sendToPlayer( EntityPlayer player, IMessage packet )
-    {
-        networkWrapper.sendTo( packet, (EntityPlayerMP) player );
-    }
-
-    public static void sendToAllPlayers( IMessage packet )
-    {
-        networkWrapper.sendToAll( packet );
-    }
-
-    public static void sendToServer( IMessage packet )
-    {
-        networkWrapper.sendToServer( packet );
-    }
-
-    public static void sendToAllAround( IMessage packet, NetworkRegistry.TargetPoint point )
-    {
-        networkWrapper.sendToAllAround( packet, point );
-    }
-
-    public static boolean canPlayerUseCommands( EntityPlayer player )
-    {
-        MinecraftServer server = player.getServer();
-        if( server != null )
-        {
-            return server.getPlayerList().canSendCommands( player.getGameProfile() );
-        }
-        return false;
-    }
-
-    @Deprecated
-    public static void registerPermissionProvider( ITurtlePermissionProvider provider )
-    {
-        TurtlePermissions.register( provider );
-    }
-
-    @Deprecated
-    public static void registerPocketUpgrade( IPocketUpgrade upgrade )
-    {
-        dan200.computercraft.shared.PocketUpgrades.register( upgrade );
-    }
-
-    @Deprecated
-    public static void registerPeripheralProvider( IPeripheralProvider provider )
-    {
-        Peripherals.register( provider );
-    }
-
-    @Deprecated
-    public static void registerBundledRedstoneProvider( IBundledRedstoneProvider provider )
-    {
-        BundledRedstone.register( provider );
-    }
-
-    @Deprecated
-    public static void registerMediaProvider( IMediaProvider provider )
-    {
-        MediaProviders.register( provider );
-    }
-
-    @Deprecated
-    public static void registerAPIFactory( ILuaAPIFactory factory )
-    {
-        ApiFactories.register( factory );
-    }
-
-    @Deprecated
-    public static IWiredNode createWiredNodeForElement( IWiredElement element )
-    {
-        return new WiredNode( element );
-    }
-
-    @Deprecated
-    public static IWiredElement getWiredElementAt( IBlockAccess world, BlockPos pos, EnumFacing side )
-    {
-        TileEntity tile = world.getTileEntity( pos );
-        return tile != null && tile.hasCapability( CapabilityWiredElement.CAPABILITY, side )
-            ? tile.getCapability( CapabilityWiredElement.CAPABILITY, side )
-            : null;
-    }
-
-    @Deprecated
-    public static int getDefaultBundledRedstoneOutput( World world, BlockPos pos, EnumFacing side )
-    {
-        return BundledRedstone.getDefaultOutput( world, pos, side );
-    }
-
-    @Deprecated
-    public static IPacketNetwork getWirelessNetwork()
-    {
-        return WirelessNetwork.getUniversal();
-    }
-
-    @Deprecated
-    public static int createUniqueNumberedSaveDir( World world, String parentSubPath )
-    {
-        return IDAssigner.getNextIDFromDirectory( new File( getWorldDir( world ), parentSubPath ) );
-    }
-
-    @Deprecated
-    public static IWritableMount createSaveDirMount( World world, String subPath, long capacity )
+    public static InputStream getResourceFile( String domain, String subPath )
     {
+        ReloadableResourceManager manager = ComputerCraftProxyCommon.getServer().getDataManager();
         try
         {
-            return new FileMount( new File( getWorldDir( world ), subPath ), capacity );
+            return manager.getResource( new Identifier( domain, subPath ) ).getInputStream();
         }
-        catch( Exception e )
+        catch( IOException ignored )
         {
             return null;
         }
     }
-
-    @Deprecated
-    public static IMount createResourceMount( Class<?> modClass, String domain, String subPath )
-    {
-        // Start building list of mounts
-        List<IMount> mounts = new ArrayList<>();
-        subPath = "assets/" + domain + "/" + subPath;
-
-        // Mount from debug dir
-        File codeDir = getDebugCodeDir( modClass );
-        if( codeDir != null )
-        {
-            File subResource = new File( codeDir, subPath );
-            if( subResource.exists() )
-            {
-                IMount resourcePackMount = new FileMount( subResource, 0 );
-                mounts.add( resourcePackMount );
-            }
-        }
-
-        // Mount from mod jar
-        File modJar = getContainingJar( modClass );
-        if( modJar != null )
-        {
-            try
-            {
-                FileSystem fs = FileSystems.newFileSystem( modJar.toPath(), ComputerCraft.class.getClassLoader() );
-                mounts.add( new FileSystemMount( fs, subPath ) );
-            }
-            catch( IOException | RuntimeException | ServiceConfigurationError e )
-            {
-                ComputerCraft.log.error( "Could not load mount from mod jar", e );
-                // Ignore
-            }
-        }
-
-        // Mount from resource packs
-        File resourcePackDir = getResourcePackDir();
-        if( resourcePackDir.exists() && resourcePackDir.isDirectory() )
-        {
-            String[] resourcePacks = resourcePackDir.list();
-            for( String resourcePackName : resourcePacks )
-            {
-                try
-                {
-                    File resourcePack = new File( resourcePackDir, resourcePackName );
-                    if( !resourcePack.isDirectory() )
-                    {
-                        // Mount a resource pack from a jar
-                        FileSystem fs = FileSystems.newFileSystem( resourcePack.toPath(), ComputerCraft.class.getClassLoader() );
-                        if( Files.exists( fs.getPath( subPath ) ) ) mounts.add( new FileSystemMount( fs, subPath ) );
-                    }
-                    else
-                    {
-                        // Mount a resource pack from a folder
-                        File subResource = new File( resourcePack, subPath );
-                        if( subResource.exists() )
-                        {
-                            IMount resourcePackMount = new FileMount( subResource, 0 );
-                            mounts.add( resourcePackMount );
-                        }
-                    }
-                }
-                catch( IOException | RuntimeException | ServiceConfigurationError e )
-                {
-                    ComputerCraft.log.error( "Could not load resource pack '" + resourcePackName + "'", e );
-                }
-            }
-        }
-
-        // Return the combination of all the mounts found
-        if( mounts.size() >= 2 )
-        {
-            IMount[] mountArray = new IMount[mounts.size()];
-            mounts.toArray( mountArray );
-            return new ComboMount( mountArray );
-        }
-        else if( mounts.size() == 1 )
-        {
-            return mounts.get( 0 );
-        }
-        else
-        {
-            return null;
-        }
-    }
-
-    public static InputStream getResourceFile( Class<?> modClass, String domain, String subPath )
-    {
-        // Start searching in possible locations
-        subPath = "assets/" + domain + "/" + subPath;
-
-        // Look in resource packs
-        File resourcePackDir = getResourcePackDir();
-        if( resourcePackDir.exists() && resourcePackDir.isDirectory() )
-        {
-            String[] resourcePacks = resourcePackDir.list();
-            for( String resourcePackPath : resourcePacks )
-            {
-                File resourcePack = new File( resourcePackDir, resourcePackPath );
-                if( resourcePack.isDirectory() )
-                {
-                    // Mount a resource pack from a folder
-                    File subResource = new File( resourcePack, subPath );
-                    if( subResource.exists() && subResource.isFile() )
-                    {
-                        try
-                        {
-                            return new FileInputStream( subResource );
-                        }
-                        catch( FileNotFoundException ignored )
-                        {
-                        }
-                    }
-                }
-                else
-                {
-                    ZipFile zipFile = null;
-                    try
-                    {
-                        final ZipFile zip = zipFile = new ZipFile( resourcePack );
-                        ZipEntry entry = zipFile.getEntry( subPath );
-                        if( entry != null )
-                        {
-                            // Return a custom InputStream which will close the original zip when finished.
-                            return new FilterInputStream( zipFile.getInputStream( entry ) )
-                            {
-                                @Override
-                                public void close() throws IOException
-                                {
-                                    super.close();
-                                    zip.close();
-                                }
-                            };
-                        }
-                        else
-                        {
-                            IoUtil.closeQuietly( zipFile );
-                        }
-                    }
-                    catch( IOException e )
-                    {
-                        if( zipFile != null ) IoUtil.closeQuietly( zipFile );
-                    }
-                }
-            }
-        }
-
-        // Look in debug dir
-        File codeDir = getDebugCodeDir( modClass );
-        if( codeDir != null )
-        {
-            File subResource = new File( codeDir, subPath );
-            if( subResource.exists() && subResource.isFile() )
-            {
-                try
-                {
-                    return new FileInputStream( subResource );
-                }
-                catch( FileNotFoundException ignored )
-                {
-                }
-            }
-        }
-
-        // Look in class loader
-        return modClass.getClassLoader().getResourceAsStream( subPath );
-    }
-
-    private static File getContainingJar( Class<?> modClass )
-    {
-        String path = modClass.getProtectionDomain().getCodeSource().getLocation().getPath();
-        int bangIndex = path.indexOf( "!" );
-        if( bangIndex >= 0 )
-        {
-            path = path.substring( 0, bangIndex );
-        }
-
-        URL url;
-        try
-        {
-            url = new URL( path );
-        }
-        catch( MalformedURLException e1 )
-        {
-            return null;
-        }
-
-        File file;
-        try
-        {
-            file = new File( url.toURI() );
-        }
-        catch( URISyntaxException e )
-        {
-            file = new File( url.getPath() );
-        }
-        return file;
-    }
-
-    private static File getDebugCodeDir( Class<?> modClass )
-    {
-        String path = modClass.getProtectionDomain().getCodeSource().getLocation().getPath();
-        int bangIndex = path.indexOf( "!" );
-        return bangIndex >= 0 ? null : new File( new File( path ).getParentFile(), "../.." );
-    }
-
-    @Deprecated
-    public static void registerTurtleUpgrade( ITurtleUpgrade upgrade )
-    {
-        TurtleUpgrades.register( upgrade );
-    }
-
-    //region Compatibility
-    @Deprecated
-    public static IMedia getMedia( ItemStack stack )
-    {
-        return MediaProviders.get( stack );
-    }
-
-    @Deprecated
-    public static IPocketUpgrade getPocketUpgrade( ItemStack stack )
-    {
-        return dan200.computercraft.shared.PocketUpgrades.get( stack );
-    }
-
-    @Deprecated
-    public static ITurtleUpgrade getTurtleUpgrade( ItemStack stack )
-    {
-        return TurtleUpgrades.get( stack );
-    }
-
-    @Deprecated
-    public static IPocketUpgrade getPocketUpgrade( String id )
-    {
-        return dan200.computercraft.shared.PocketUpgrades.get( id );
-    }
-
-    @Deprecated
-    public static ITurtleUpgrade getTurtleUpgrade( String id )
-    {
-        return TurtleUpgrades.get( id );
-    }
-
-    @Deprecated
-    public static IPeripheral getPeripheralAt( World world, BlockPos pos, EnumFacing side )
-    {
-        return Peripherals.getPeripheral( world, pos, side );
-    }
-    //endregion
 }

src/main/java/dan200/computercraft/ComputerCraftAPIImpl.java

@@ -0,0 +1,150 @@
+/*
+ * This file is part of ComputerCraft - http://www.computercraft.info
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
+ * Send enquiries to dratcliffe@gmail.com
+ */
+
+package dan200.computercraft;
+
+import dan200.computercraft.api.ComputerCraftAPI.IComputerCraftAPI;
+import dan200.computercraft.api.filesystem.IMount;
+import dan200.computercraft.api.filesystem.IWritableMount;
+import dan200.computercraft.api.lua.ILuaAPIFactory;
+import dan200.computercraft.api.media.IMediaProvider;
+import dan200.computercraft.api.network.IPacketNetwork;
+import dan200.computercraft.api.network.wired.IWiredElement;
+import dan200.computercraft.api.network.wired.IWiredNode;
+import dan200.computercraft.api.peripheral.IPeripheralProvider;
+import dan200.computercraft.api.pocket.IPocketUpgrade;
+import dan200.computercraft.api.redstone.IBundledRedstoneProvider;
+import dan200.computercraft.api.turtle.ITurtleUpgrade;
+import dan200.computercraft.core.apis.ApiFactories;
+import dan200.computercraft.core.filesystem.FileMount;
+import dan200.computercraft.shared.*;
+import dan200.computercraft.shared.peripheral.modem.wired.TileCable;
+import dan200.computercraft.shared.peripheral.modem.wired.TileWiredModemFull;
+import dan200.computercraft.shared.peripheral.modem.wireless.WirelessNetwork;
+import dan200.computercraft.shared.util.IDAssigner;
+import dan200.computercraft.shared.wired.WiredNode;
+import net.minecraft.block.entity.BlockEntity;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.Direction;
+import net.minecraft.world.BlockView;
+import net.minecraft.world.World;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import java.io.File;
+
+public final class ComputerCraftAPIImpl implements IComputerCraftAPI
+{
+    public static final ComputerCraftAPIImpl INSTANCE = new ComputerCraftAPIImpl();
+
+    private ComputerCraftAPIImpl()
+    {
+    }
+
+    @Nonnull
+    @Override
+    public String getInstalledVersion()
+    {
+        return "${version}";
+    }
+
+    @Override
+    public int createUniqueNumberedSaveDir( @Nonnull World world, @Nonnull String parentSubPath )
+    {
+        return IDAssigner.getNextId( world, parentSubPath );
+    }
+
+    @Override
+    public IWritableMount createSaveDirMount( @Nonnull World world, @Nonnull String subPath, long capacity )
+    {
+        try
+        {
+            return new FileMount( new File( IDAssigner.getDir( world ), subPath ), capacity );
+        }
+        catch( Exception e )
+        {
+            return null;
+        }
+    }
+
+    @Override
+    public IMount createResourceMount( @Nonnull String domain, @Nonnull String subPath )
+    {
+        return ComputerCraft.createResourceMount( domain, subPath );
+    }
+
+    @Override
+    public void registerPeripheralProvider( @Nonnull IPeripheralProvider provider )
+    {
+        Peripherals.register( provider );
+    }
+
+    @Override
+    public void registerTurtleUpgrade( @Nonnull ITurtleUpgrade upgrade )
+    {
+        TurtleUpgrades.register( upgrade );
+    }
+
+    @Override
+    public void registerBundledRedstoneProvider( @Nonnull IBundledRedstoneProvider provider )
+    {
+        BundledRedstone.register( provider );
+    }
+
+    @Override
+    public int getBundledRedstoneOutput( @Nonnull World world, @Nonnull BlockPos pos, @Nonnull Direction side )
+    {
+        return BundledRedstone.getDefaultOutput( world, pos, side );
+    }
+
+    @Override
+    public void registerMediaProvider( @Nonnull IMediaProvider provider )
+    {
+        MediaProviders.register( provider );
+    }
+
+    @Override
+    public void registerPocketUpgrade( @Nonnull IPocketUpgrade upgrade )
+    {
+        PocketUpgrades.register( upgrade );
+    }
+
+    @Nonnull
+    @Override
+    public IPacketNetwork getWirelessNetwork()
+    {
+        return WirelessNetwork.getUniversal();
+    }
+
+    @Override
+    public void registerAPIFactory( @Nonnull ILuaAPIFactory factory )
+    {
+        ApiFactories.register( factory );
+    }
+
+    @Nonnull
+    @Override
+    public IWiredNode createWiredNodeForElement( @Nonnull IWiredElement element )
+    {
+        return new WiredNode( element );
+    }
+
+    @Nullable
+    @Override
+    public IWiredElement getWiredElementAt( @Nonnull BlockView world, @Nonnull BlockPos pos, @Nonnull Direction side )
+    {
+        BlockEntity tile = world.getBlockEntity( pos );
+        if( tile instanceof TileCable )
+        {
+            return ((TileCable) tile).getElement( side );
+        }
+        else if( tile instanceof TileWiredModemFull )
+        {
+            return ((TileWiredModemFull) tile).getElement();
+        }
+        return null;
+    }
+}

src/main/java/dan200/computercraft/api/AbstractTurtleUpgrade.java

@@ -4,57 +4,59 @@
  * Send enquiries to dratcliffe@gmail.com
  */
 
-package dan200.computercraft.shared.turtle.upgrades;
+package dan200.computercraft.api;
 
 import dan200.computercraft.api.turtle.ITurtleUpgrade;
 import dan200.computercraft.api.turtle.TurtleUpgradeType;
-import net.minecraft.block.Block;
-import net.minecraft.item.Item;
+import net.minecraft.item.ItemProvider;
 import net.minecraft.item.ItemStack;
-import net.minecraft.util.ResourceLocation;
+import net.minecraft.util.Identifier;
+import net.minecraft.util.SystemUtil;
 
 import javax.annotation.Nonnull;
 
+/**
+ * A base class for {@link ITurtleUpgrade}s.
+ *
+ * One does not have to use this, but it does provide a convenient template.
+ */
 public abstract class AbstractTurtleUpgrade implements ITurtleUpgrade
 {
-    private final ResourceLocation id;
-    private final int legacyId;
+    private final Identifier id;
     private final TurtleUpgradeType type;
     private final String adjective;
     private final ItemStack stack;
 
-    public AbstractTurtleUpgrade( ResourceLocation id, int legacyId, TurtleUpgradeType type, String adjective, ItemStack stack )
+    protected AbstractTurtleUpgrade( Identifier id, TurtleUpgradeType type, String adjective, ItemStack stack )
     {
         this.id = id;
-        this.legacyId = legacyId;
         this.type = type;
         this.adjective = adjective;
         this.stack = stack;
     }
 
-    public AbstractTurtleUpgrade( ResourceLocation id, int legacyId, TurtleUpgradeType type, String adjective, Item item )
+    protected AbstractTurtleUpgrade( Identifier id, TurtleUpgradeType type, String adjective, ItemProvider item )
     {
-        this( id, legacyId, type, adjective, new ItemStack( item ) );
+        this( id, type, adjective, new ItemStack( item ) );
     }
 
-    public AbstractTurtleUpgrade( ResourceLocation id, int legacyId, TurtleUpgradeType type, String adjective, Block block )
+    protected AbstractTurtleUpgrade( Identifier id, TurtleUpgradeType type, ItemStack stack )
     {
-        this( id, legacyId, type, adjective, new ItemStack( block ) );
+        this( id, type, SystemUtil.createTranslationKey( "upgrade", id ) + ".adjective", stack );
+    }
+
+    protected AbstractTurtleUpgrade( Identifier id, TurtleUpgradeType type, ItemProvider item )
+    {
+        this( id, type, new ItemStack( item ) );
     }
 
     @Nonnull
     @Override
-    public final ResourceLocation getUpgradeID()
+    public final Identifier getUpgradeID()
     {
         return id;
     }
 
-    @Override
-    public final int getLegacyUpgradeID()
-    {
-        return legacyId;
-    }
-
     @Nonnull
     @Override
     public final String getUnlocalisedAdjective()

src/main/java/dan200/computercraft/api/ComputerCraftAPI.java

@@ -17,18 +17,16 @@ import dan200.computercraft.api.network.wired.IWiredNode;
 import dan200.computercraft.api.peripheral.IComputerAccess;
 import dan200.computercraft.api.peripheral.IPeripheral;
 import dan200.computercraft.api.peripheral.IPeripheralProvider;
-import dan200.computercraft.api.permissions.ITurtlePermissionProvider;
 import dan200.computercraft.api.pocket.IPocketUpgrade;
 import dan200.computercraft.api.redstone.IBundledRedstoneProvider;
 import dan200.computercraft.api.turtle.ITurtleUpgrade;
-import net.minecraft.util.EnumFacing;
 import net.minecraft.util.math.BlockPos;
-import net.minecraft.world.IBlockAccess;
+import net.minecraft.util.math.Direction;
+import net.minecraft.world.BlockView;
 import net.minecraft.world.World;
 
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
-import java.lang.reflect.Method;
 
 /**
  * The static entry point to the ComputerCraft API.
@@ -37,28 +35,10 @@ import java.lang.reflect.Method;
  */
 public final class ComputerCraftAPI
 {
-    public static boolean isInstalled()
-    {
-        findCC();
-        return computerCraft != null;
-    }
-
     @Nonnull
     public static String getInstalledVersion()
     {
-        findCC();
-        if( computerCraft_getVersion != null )
-        {
-            try
-            {
-                return (String) computerCraft_getVersion.invoke( null );
-            }
-            catch( Exception e )
-            {
-                // It failed
-            }
-        }
-        return "";
+        return getInstance().getInstalledVersion();
     }
 
     @Nonnull
@@ -82,19 +62,7 @@ public final class ComputerCraftAPI
      */
     public static int createUniqueNumberedSaveDir( @Nonnull World world, @Nonnull String parentSubPath )
     {
-        findCC();
-        if( computerCraft_createUniqueNumberedSaveDir != null )
-        {
-            try
-            {
-                return (Integer) computerCraft_createUniqueNumberedSaveDir.invoke( null, world, parentSubPath );
-            }
-            catch( Exception e )
-            {
-                // It failed
-            }
-        }
-        return -1;
+        return getInstance().createUniqueNumberedSaveDir( world, parentSubPath );
     }
 
     /**
@@ -118,78 +86,66 @@ public final class ComputerCraftAPI
     @Nullable
     public static IWritableMount createSaveDirMount( @Nonnull World world, @Nonnull String subPath, long capacity )
     {
-        findCC();
-        if( computerCraft_createSaveDirMount != null )
-        {
-            try
-            {
-                return (IWritableMount) computerCraft_createSaveDirMount.invoke( null, world, subPath, capacity );
-            }
-            catch( Exception e )
-            {
-                // It failed
-            }
-        }
-        return null;
+        return getInstance().createSaveDirMount( world, subPath, capacity );
     }
 
     /**
      * Creates a file system mount to a resource folder, and returns it.
      *
-     * Use in conjunction with IComputerAccess.mount() or IComputerAccess.mountWritable() to mount a resource folder
-     * onto a computer's file system.
+     * Use in conjunction with {@link IComputerAccess#mount} or {@link IComputerAccess#mountWritable} to mount a
+     * resource folder onto a computer's file system.
      *
-     * The files in this mount will be a combination of files in the specified mod jar, and resource packs that contain
+     * The files in this mount will be a combination of files in all mod jar, and data packs that contain
      * resources with the same domain and path.
      *
-     * @param modClass A class in whose jar to look first for the resources to mount. Using your main mod class is recommended. eg: MyMod.class
-     * @param domain   The domain under which to look for resources. eg: "mymod".
-     * @param subPath  The domain under which to look for resources. eg: "mymod/lua/myfiles".
-     * @return The mount, or {@code null} if it could be created for some reason. Use IComputerAccess.mount() or
-     * IComputerAccess.mountWritable() to mount this on a Computers' file system.
+     * @param domain  The domain under which to look for resources. eg: "mymod".
+     * @param subPath The subPath under which to look for resources. eg: "lua/myfiles".
+     * @return The mount, or {@code null} if it could be created for some reason.
      * @see IComputerAccess#mount(String, IMount)
      * @see IComputerAccess#mountWritable(String, IWritableMount)
      * @see IMount
      */
     @Nullable
-    public static IMount createResourceMount( @Nonnull Class<?> modClass, @Nonnull String domain, @Nonnull String subPath )
+    public static IMount createResourceMount( @Nonnull String domain, @Nonnull String subPath )
     {
-        findCC();
-        if( computerCraft_createResourceMount != null )
-        {
-            try
-            {
-                return (IMount) computerCraft_createResourceMount.invoke( null, modClass, domain, subPath );
-            }
-            catch( Exception e )
-            {
-                // It failed
-            }
-        }
-        return null;
+        return getInstance().createResourceMount( domain, subPath );
+    }
+
+    /**
+     * Creates a file system mount to a resource folder, and returns it.
+     *
+     * Use in conjunction with {@link IComputerAccess#mount} or {@link IComputerAccess#mountWritable} to mount a
+     * resource folder onto a computer's file system.
+     *
+     * The files in this mount will be a combination of files in all mod jar, and data packs that contain
+     * resources with the same domain and path.
+     *
+     * @param klass   The mod class to which the files belong.
+     * @param domain  The domain under which to look for resources. eg: "mymod".
+     * @param subPath The subPath under which to look for resources. eg: "lua/myfiles".
+     * @return The mount, or {@code null} if it could be created for some reason.
+     * @see IComputerAccess#mount(String, IMount)
+     * @see IComputerAccess#mountWritable(String, IWritableMount)
+     * @see IMount
+     * @deprecated Use {@link #createResourceMount(String, String)} instead.
+     */
+    @Nullable
+    @Deprecated
+    public static IMount createResourceMount( Class<?> klass, @Nonnull String domain, @Nonnull String subPath )
+    {
+        return getInstance().createResourceMount( domain, subPath );
     }
 
     /**
      * Registers a peripheral provider to convert blocks into {@link IPeripheral} implementations.
      *
      * @param provider The peripheral provider to register.
-     * @see dan200.computercraft.api.peripheral.IPeripheral
-     * @see dan200.computercraft.api.peripheral.IPeripheralProvider
+     * @see IPeripheral
+     * @see IPeripheralProvider
      */
     public static void registerPeripheralProvider( @Nonnull IPeripheralProvider provider )
     {
-        findCC();
-        if( computerCraft_registerPeripheralProvider != null )
-        {
-            try
-            {
-                computerCraft_registerPeripheralProvider.invoke( null, provider );
-            }
-            catch( Exception e )
-            {
-                // It failed
-            }
-        }
+        getInstance().registerPeripheralProvider( provider );
     }
 
     /**
@@ -198,47 +154,22 @@ public final class ComputerCraftAPI
      * this during the load() method of your mod.
      *
      * @param upgrade The turtle upgrade to register.
-     * @see dan200.computercraft.api.turtle.ITurtleUpgrade
+     * @see ITurtleUpgrade
      */
     public static void registerTurtleUpgrade( @Nonnull ITurtleUpgrade upgrade )
     {
-        if( upgrade != null )
-        {
-            findCC();
-            if( computerCraft_registerTurtleUpgrade != null )
-            {
-                try
-                {
-                    computerCraft_registerTurtleUpgrade.invoke( null, upgrade );
-                }
-                catch( Exception e )
-                {
-                    // It failed
-                }
-            }
-        }
+        getInstance().registerTurtleUpgrade( upgrade );
     }
 
     /**
      * Registers a bundled redstone provider to provide bundled redstone output for blocks.
      *
      * @param provider The bundled redstone provider to register.
-     * @see dan200.computercraft.api.redstone.IBundledRedstoneProvider
+     * @see IBundledRedstoneProvider
      */
     public static void registerBundledRedstoneProvider( @Nonnull IBundledRedstoneProvider provider )
     {
-        findCC();
-        if( computerCraft_registerBundledRedstoneProvider != null )
-        {
-            try
-            {
-                computerCraft_registerBundledRedstoneProvider.invoke( null, provider );
-            }
-            catch( Exception e )
-            {
-                // It failed
-            }
-        }
+        getInstance().registerBundledRedstoneProvider( provider );
     }
 
     /**
@@ -249,85 +180,27 @@ public final class ComputerCraftAPI
      * @param side  The side to extract the bundled redstone output from.
      * @return If there is a block capable of emitting bundled redstone at the location, it's signal (0-65535) will be returned.
      * If there is no block capable of emitting bundled redstone at the location, -1 will be returned.
-     * @see dan200.computercraft.api.redstone.IBundledRedstoneProvider
+     * @see IBundledRedstoneProvider
      */
-    public static int getBundledRedstoneOutput( @Nonnull World world, @Nonnull BlockPos pos, @Nonnull EnumFacing side )
+    public static int getBundledRedstoneOutput( @Nonnull World world, @Nonnull BlockPos pos, @Nonnull Direction side )
     {
-        findCC();
-        if( computerCraft_getDefaultBundledRedstoneOutput != null )
-        {
-            try
-            {
-                return (Integer) computerCraft_getDefaultBundledRedstoneOutput.invoke( null, world, pos, side );
-            }
-            catch( Exception e )
-            {
-                // It failed
-            }
-        }
-        return -1;
+        return getInstance().getBundledRedstoneOutput( world, pos, side );
     }
 
     /**
      * Registers a media provider to provide {@link IMedia} implementations for Items
      *
      * @param provider The media provider to register.
-     * @see dan200.computercraft.api.media.IMediaProvider
+     * @see IMediaProvider
      */
     public static void registerMediaProvider( @Nonnull IMediaProvider provider )
     {
-        findCC();
-        if( computerCraft_registerMediaProvider != null )
-        {
-            try
-            {
-                computerCraft_registerMediaProvider.invoke( null, provider );
-            }
-            catch( Exception e )
-            {
-                // It failed
-            }
-        }
-    }
-
-    /**
-     * Registers a permission provider to restrict where turtles can move or build.
-     *
-     * @param provider The turtle permission provider to register.
-     * @see dan200.computercraft.api.permissions.ITurtlePermissionProvider
-     * @deprecated Prefer using {@link dan200.computercraft.api.turtle.event.TurtleBlockEvent} or the standard Forge events.
-     */
-    @Deprecated
-    public static void registerPermissionProvider( @Nonnull ITurtlePermissionProvider provider )
-    {
-        findCC();
-        if( computerCraft_registerPermissionProvider != null )
-        {
-            try
-            {
-                computerCraft_registerPermissionProvider.invoke( null, provider );
-            }
-            catch( Exception e )
-            {
-                // It failed
-            }
-        }
+        getInstance().registerMediaProvider( provider );
     }
 
     public static void registerPocketUpgrade( @Nonnull IPocketUpgrade upgrade )
     {
-        findCC();
-        if( computerCraft_registerPocketUpgrade != null )
-        {
-            try
-            {
-                computerCraft_registerPocketUpgrade.invoke( null, upgrade );
-            }
-            catch( Exception e )
-            {
-                // It failed
-            }
-        }
+        getInstance().registerPocketUpgrade( upgrade );
     }
 
     /**
@@ -337,36 +210,12 @@ public final class ComputerCraftAPI
      */
     public static IPacketNetwork getWirelessNetwork()
     {
-        findCC();
-        if( computerCraft_getWirelessNetwork != null )
-        {
-            try
-            {
-                return (IPacketNetwork) computerCraft_getWirelessNetwork.invoke( null );
-            }
-            catch( Exception e )
-            {
-                // It failed;
-            }
-        }
-
-        return null;
+        return getInstance().getWirelessNetwork();
     }
 
-    public static void registerAPIFactory( @Nonnull ILuaAPIFactory upgrade )
+    public static void registerAPIFactory( @Nonnull ILuaAPIFactory factory )
     {
-        findCC();
-        if( computerCraft_registerAPIFactory != null )
-        {
-            try
-            {
-                computerCraft_registerAPIFactory.invoke( null, upgrade );
-            }
-            catch( Exception e )
-            {
-                // It failed
-            }
-        }
+        getInstance().registerAPIFactory( factory );
     }
 
     /**
@@ -379,22 +228,7 @@ public final class ComputerCraftAPI
     @Nonnull
     public static IWiredNode createWiredNodeForElement( @Nonnull IWiredElement element )
     {
-        findCC();
-        if( computerCraft_createWiredNodeForElement != null )
-        {
-            try
-            {
-                return (IWiredNode) computerCraft_createWiredNodeForElement.invoke( null, element );
-            }
-            catch( ReflectiveOperationException e )
-            {
-                throw new IllegalStateException( "Error creating wired node", e );
-            }
-        }
-        else
-        {
-            throw new IllegalStateException( "ComputerCraft cannot be found" );
-        }
+        return getInstance().createWiredNodeForElement( element );
     }
 
     /**
@@ -407,117 +241,63 @@ public final class ComputerCraftAPI
      * @see IWiredElement#getNode()
      */
     @Nullable
-    public static IWiredElement getWiredElementAt( @Nonnull IBlockAccess world, @Nonnull BlockPos pos, @Nonnull EnumFacing side )
+    public static IWiredElement getWiredElementAt( @Nonnull BlockView world, @Nonnull BlockPos pos, @Nonnull Direction side )
     {
-        findCC();
-        if( computerCraft_getWiredElementAt != null )
-        {
-            try
-            {
-                return (IWiredElement) computerCraft_getWiredElementAt.invoke( null, world, pos, side );
-            }
-            catch( ReflectiveOperationException ignored )
-            {
-            }
-        }
-
-        return null;
+        return getInstance().getWiredElementAt( world, pos, side );
     }
 
-    // The functions below here are private, and are used to interface with the non-API ComputerCraft classes.
-    // Reflection is used here so you can develop your mod without decompiling ComputerCraft and including
-    // it in your solution, and so your mod won't crash if ComputerCraft is installed.
+    private static IComputerCraftAPI instance;
 
-    private static void findCC()
+    @Nonnull
+    private static IComputerCraftAPI getInstance()
     {
-        if( !ccSearched )
-        {
-            try
-            {
-                computerCraft = Class.forName( "dan200.computercraft.ComputerCraft" );
-                computerCraft_getVersion = findCCMethod( "getVersion", new Class<?>[] {
-                } );
-                computerCraft_createUniqueNumberedSaveDir = findCCMethod( "createUniqueNumberedSaveDir", new Class<?>[] {
-                    World.class, String.class
-                } );
-                computerCraft_createSaveDirMount = findCCMethod( "createSaveDirMount", new Class<?>[] {
-                    World.class, String.class, Long.TYPE
-                } );
-                computerCraft_createResourceMount = findCCMethod( "createResourceMount", new Class<?>[] {
-                    Class.class, String.class, String.class
-                } );
-                computerCraft_registerPeripheralProvider = findCCMethod( "registerPeripheralProvider", new Class<?>[] {
-                    IPeripheralProvider.class
-                } );
-                computerCraft_registerTurtleUpgrade = findCCMethod( "registerTurtleUpgrade", new Class<?>[] {
-                    ITurtleUpgrade.class
-                } );
-                computerCraft_registerBundledRedstoneProvider = findCCMethod( "registerBundledRedstoneProvider", new Class<?>[] {
-                    IBundledRedstoneProvider.class
-                } );
-                computerCraft_getDefaultBundledRedstoneOutput = findCCMethod( "getDefaultBundledRedstoneOutput", new Class<?>[] {
-                    World.class, BlockPos.class, EnumFacing.class
-                } );
-                computerCraft_registerMediaProvider = findCCMethod( "registerMediaProvider", new Class<?>[] {
-                    IMediaProvider.class
-                } );
-                computerCraft_registerPermissionProvider = findCCMethod( "registerPermissionProvider", new Class<?>[] {
-                    ITurtlePermissionProvider.class
-                } );
-                computerCraft_registerPocketUpgrade = findCCMethod( "registerPocketUpgrade", new Class<?>[] {
-                    IPocketUpgrade.class
-                } );
-                computerCraft_getWirelessNetwork = findCCMethod( "getWirelessNetwork", new Class<?>[] {
-                } );
-                computerCraft_registerAPIFactory = findCCMethod( "registerAPIFactory", new Class<?>[] {
-                    ILuaAPIFactory.class
-                } );
-                computerCraft_createWiredNodeForElement = findCCMethod( "createWiredNodeForElement", new Class<?>[] {
-                    IWiredElement.class
-                } );
-                computerCraft_getWiredElementAt = findCCMethod( "getWiredElementAt", new Class<?>[] {
-                    IBlockAccess.class, BlockPos.class, EnumFacing.class
-                } );
-            }
-            catch( Exception e )
-            {
-                System.out.println( "ComputerCraftAPI: ComputerCraft not found." );
-            }
-            finally
-            {
-                ccSearched = true;
-            }
-        }
-    }
+        if( instance != null ) return instance;
 
-    private static Method findCCMethod( String name, Class<?>[] args )
-    {
         try
         {
-            return computerCraft != null ? computerCraft.getMethod( name, args ) : null;
+            return instance = (IComputerCraftAPI) Class.forName( "dan200.computercraft.ComputerCraftAPIImpl" )
+                .getField( "INSTANCE" ).get( null );
         }
-        catch( NoSuchMethodException e )
+        catch( ReflectiveOperationException e )
         {
-            System.out.println( "ComputerCraftAPI: ComputerCraft method " + name + " not found." );
-            return null;
+            throw new IllegalStateException( "Cannot find ComputerCraft API", e );
         }
     }
 
-    private static boolean ccSearched = false;
-    private static Class<?> computerCraft = null;
-    private static Method computerCraft_getVersion = null;
-    private static Method computerCraft_createUniqueNumberedSaveDir = null;
-    private static Method computerCraft_createSaveDirMount = null;
-    private static Method computerCraft_createResourceMount = null;
-    private static Method computerCraft_registerPeripheralProvider = null;
-    private static Method computerCraft_registerTurtleUpgrade = null;
-    private static Method computerCraft_registerBundledRedstoneProvider = null;
-    private static Method computerCraft_getDefaultBundledRedstoneOutput = null;
-    private static Method computerCraft_registerMediaProvider = null;
-    private static Method computerCraft_registerPermissionProvider = null;
-    private static Method computerCraft_registerPocketUpgrade = null;
-    private static Method computerCraft_getWirelessNetwork = null;
-    private static Method computerCraft_registerAPIFactory = null;
-    private static Method computerCraft_createWiredNodeForElement = null;
-    private static Method computerCraft_getWiredElementAt = null;
+    public interface IComputerCraftAPI
+    {
+        @Nonnull
+        String getInstalledVersion();
+
+        int createUniqueNumberedSaveDir( @Nonnull World world, @Nonnull String parentSubPath );
+
+        @Nullable
+        IWritableMount createSaveDirMount( @Nonnull World world, @Nonnull String subPath, long capacity );
+
+        @Nullable
+        IMount createResourceMount( @Nonnull String domain, @Nonnull String subPath );
+
+        void registerPeripheralProvider( @Nonnull IPeripheralProvider provider );
+
+        void registerTurtleUpgrade( @Nonnull ITurtleUpgrade upgrade );
+
+        void registerBundledRedstoneProvider( @Nonnull IBundledRedstoneProvider provider );
+
+        int getBundledRedstoneOutput( @Nonnull World world, @Nonnull BlockPos pos, @Nonnull Direction side );
+
+        void registerMediaProvider( @Nonnull IMediaProvider provider );
+
+        void registerPocketUpgrade( @Nonnull IPocketUpgrade upgrade );
+
+        @Nonnull
+        IPacketNetwork getWirelessNetwork();
+
+        void registerAPIFactory( @Nonnull ILuaAPIFactory factory );
+
+        @Nonnull
+        IWiredNode createWiredNodeForElement( @Nonnull IWiredElement element );
+
+        @Nullable
+        IWiredElement getWiredElementAt( @Nonnull BlockView world, @Nonnull BlockPos pos, @Nonnull Direction side );
+    }
 }

src/main/java/dan200/computercraft/api/filesystem/package-info.java

@@ -1,10 +0,0 @@
-/*
- * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
- * For help using the API, and posting your mods, visit the forums at computercraft.info.
- */
-
-@API( owner = "ComputerCraft", provides = "ComputerCraft|API|FileSystem", apiVersion = "${version}" )
-package dan200.computercraft.api.filesystem;
-
-import net.minecraftforge.fml.common.API;

src/main/java/dan200/computercraft/api/lua/ILuaAPIFactory.java

@@ -17,6 +17,7 @@ import javax.annotation.Nullable;
  * @see ILuaAPI
  * @see ComputerCraftAPI#registerAPIFactory(ILuaAPIFactory)
  */
+@FunctionalInterface
 public interface ILuaAPIFactory
 {
     /**

src/main/java/dan200/computercraft/api/lua/ILuaContext.java

@@ -32,7 +32,12 @@ public interface ILuaContext
      *                              intercepted, or the computer will leak memory and end up in a broken state.
      */
     @Nonnull
-    Object[] pullEvent( @Nullable String filter ) throws LuaException, InterruptedException;
+    default Object[] pullEvent( @Nullable String filter ) throws LuaException, InterruptedException
+    {
+        Object[] results = pullEventRaw( filter );
+        if( results.length >= 1 && results[0].equals( "terminate" ) ) throw new LuaException( "Terminated", 0 );
+        return results;
+    }
 
     /**
      * The same as {@link #pullEvent(String)}, except "terminated" events are ignored. Only use this if you want to
@@ -47,7 +52,10 @@ public interface ILuaContext
      * @see #pullEvent(String)
      */
     @Nonnull
-    Object[] pullEventRaw( @Nullable String filter ) throws InterruptedException;
+    default Object[] pullEventRaw( @Nullable String filter ) throws InterruptedException
+    {
+        return yield( new Object[] { filter } );
+    }
 
     /**
      * Yield the current coroutine with some arguments until it is resumed. This method is exactly equivalent to

src/main/java/dan200/computercraft/api/lua/package-info.java

@@ -1,10 +0,0 @@
-/*
- * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
- * For help using the API, and posting your mods, visit the forums at computercraft.info.
- */
-
-@API( owner = "ComputerCraft", provides = "ComputerCraft|API|Lua", apiVersion = "${version}" )
-package dan200.computercraft.api.lua;
-
-import net.minecraftforge.fml.common.API;

src/main/java/dan200/computercraft/api/media/IMedia.java

@@ -7,8 +7,9 @@
 package dan200.computercraft.api.media;
 
 import dan200.computercraft.api.filesystem.IMount;
+import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
-import net.minecraft.util.SoundEvent;
+import net.minecraft.sound.SoundEvent;
 import net.minecraft.world.World;
 
 import javax.annotation.Nonnull;
@@ -16,7 +17,9 @@ import javax.annotation.Nullable;
 
 /**
  * Represents an item that can be placed in a disk drive and used by a Computer.
- * Implement this interface on your Item class to allow it to be used in the drive.
+ *
+ * Implement this interface on your {@link Item} class to allow it to be used in the drive. Alternatively, register
+ * a {@link IMediaProvider}.
  */
 public interface IMedia
 {
@@ -43,7 +46,7 @@ public interface IMedia
 
     /**
      * If this disk represents an item with audio (like a record), get the readable name of the audio track. ie:
-     * "Jonathon Coulton - Still Alive"
+     * "Jonathan Coulton - Still Alive"
      *
      * @param stack The {@link ItemStack} to modify.
      * @return The name, or null if this item does not represent an item with audio.
@@ -74,7 +77,7 @@ public interface IMedia
      * @param world The world in which the item and disk drive reside.
      * @return The mount, or null if this item does not represent an item with data. If the mount returned also
      * implements {@link dan200.computercraft.api.filesystem.IWritableMount}, it will mounted using mountWritable()
-     * @see dan200.computercraft.api.filesystem.IMount
+     * @see IMount
      * @see dan200.computercraft.api.filesystem.IWritableMount
      * @see dan200.computercraft.api.ComputerCraftAPI#createSaveDirMount(World, String, long)
      * @see dan200.computercraft.api.ComputerCraftAPI#createResourceMount(Class, String, String)

src/main/java/dan200/computercraft/api/media/IMediaProvider.java

@@ -23,7 +23,7 @@ public interface IMediaProvider
      * Produce an IMedia implementation from an ItemStack.
      *
      * @param stack The stack from which to extract the media information.
-     * @return An IMedia implementation, or null if the item is not something you wish to handle
+     * @return An {@link IMedia} implementation, or {@code null} if the item is not something you wish to handle
      * @see dan200.computercraft.api.ComputerCraftAPI#registerMediaProvider(IMediaProvider)
      */
     @Nullable

src/main/java/dan200/computercraft/api/media/package-info.java

@@ -1,10 +0,0 @@
-/*
- * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
- * For help using the API, and posting your mods, visit the forums at computercraft.info.
- */
-
-@API( owner = "ComputerCraft", provides = "ComputerCraft|API|Media", apiVersion = "${version}" )
-package dan200.computercraft.api.media;
-
-import net.minecraftforge.fml.common.API;

src/main/java/dan200/computercraft/api/network/package-info.java

@@ -1,10 +0,0 @@
-/*
- * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
- * For help using the API, and posting your mods, visit the forums at computercraft.info.
- */
-
-@API( owner = "ComputerCraft", provides = "ComputerCraft|API|Network", apiVersion = "${version}" )
-package dan200.computercraft.api.network;
-
-import net.minecraftforge.fml.common.API;

src/main/java/dan200/computercraft/api/network/wired/package-info.java

@@ -1,10 +0,0 @@
-/*
- * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
- * For help using the API, and posting your mods, visit the forums at computercraft.info.
- */
-
-@API( owner = "ComputerCraft", provides = "ComputerCraft|API|Network|Wired", apiVersion = "${version}" )
-package dan200.computercraft.api.network.wired;
-
-import net.minecraftforge.fml.common.API;

src/main/java/dan200/computercraft/api/package-info.java

@@ -1,10 +0,0 @@
-/*
- * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
- * For help using the API, and posting your mods, visit the forums at computercraft.info.
- */
-
-@API( owner = "ComputerCraft", provides = "ComputerCraft|API", apiVersion = "${version}" )
-package dan200.computercraft.api;
-
-import net.minecraftforge.fml.common.API;

src/main/java/dan200/computercraft/api/peripheral/IComputerAccess.java

@@ -9,6 +9,8 @@ package dan200.computercraft.api.peripheral;
 import dan200.computercraft.api.ComputerCraftAPI;
 import dan200.computercraft.api.filesystem.IMount;
 import dan200.computercraft.api.filesystem.IWritableMount;
+import dan200.computercraft.api.lua.ILuaContext;
+import dan200.computercraft.api.lua.ILuaTask;
 import net.minecraft.world.World;
 
 import javax.annotation.Nonnull;
@@ -146,7 +148,7 @@ public interface IComputerAccess
      *
      *                  You may supply {@code null} to indicate that no arguments are to be supplied.
      * @throws RuntimeException If the peripheral has been detached.
-     * @see dan200.computercraft.api.peripheral.IPeripheral#callMethod
+     * @see IPeripheral#callMethod
      */
     void queueEvent( @Nonnull String event, @Nullable Object[] arguments );
 
@@ -179,8 +181,8 @@ public interface IComputerAccess
     }
 
     /**
-     * Get a reachable peripheral with the given attachement name. This is a equivalent to
-     * {@link #getAvailablePeripherals()}{@code .get(name)}, though may be more performant.
+     * Get a reachable peripheral with the given attachment name. This is a equivalent to
+     * {@link #getAvailablePeripherals()}{@code .get(name)}, though may be more efficient.
      *
      * @param name The peripheral's attached name
      * @return The reachable peripheral, or {@code null} if none can be found.
@@ -191,4 +193,23 @@ public interface IComputerAccess
     {
         return null;
     }
+
+    /**
+     * Get a {@link IWorkMonitor} for tasks your peripheral might execute on the main (server) thread.
+     *
+     * This should be used to ensure your peripheral integrates with ComputerCraft's monitoring and limiting of how much
+     * server time each computer consumes. You should not need to use this if you use
+     * {@link ILuaContext#issueMainThreadTask(ILuaTask)} - this is intended for mods with their own system for running
+     * work on the main thread.
+     *
+     * Please note that the returned implementation is <em>not</em> thread-safe, and should only be used from the main
+     * thread.
+     *
+     * @return The work monitor for the main thread, or {@code null} if this computer does not have one.
+     */
+    @Nullable
+    default IWorkMonitor getMainThreadMonitor()
+    {
+        return null;
+    }
 }

src/main/java/dan200/computercraft/api/peripheral/IPeripheral.java

@@ -41,8 +41,8 @@ public interface IPeripheral
      * This is called when a lua program on an attached computer calls {@code peripheral.call()} with
      * one of the methods exposed by {@link #getMethodNames()}.
      *
-     * Be aware that this will be called from the ComputerCraft Lua thread, and must be thread-safe
-     * when interacting with Minecraft objects.
+     * Be aware that this will be called from the ComputerCraft Lua thread, and must be thread-safe when interacting
+     * with Minecraft objects.
      *
      * @param computer  The interface to the computer that is making the call. Remember that multiple
      *                  computers can be attached to a peripheral at once.
@@ -75,20 +75,21 @@ public interface IPeripheral
     Object[] callMethod( @Nonnull IComputerAccess computer, @Nonnull ILuaContext context, int method, @Nonnull Object[] arguments ) throws LuaException, InterruptedException;
 
     /**
-     * Is called when canAttachToSide has returned true, and a computer is attaching to the peripheral.
+     * Is called when when a computer is attaching to the peripheral.
      *
      * This will occur when a peripheral is placed next to an active computer, when a computer is turned on next to a
-     * peripheral, or when a turtle travels into a square next to a peripheral.
+     * peripheral, when a turtle travels into a square next to a peripheral, or when a wired modem adjacent to this
+     * peripheral is does any of the above.
      *
-     * Between calls to attach() and detach(), the attached computer can make method calls on the peripheral using
+     * Between calls to attach and {@link #detach}, the attached computer can make method calls on the peripheral using
      * {@code peripheral.call()}. This method can be used to keep track of which computers are attached to the
      * peripheral, or to take action when attachment occurs.
      *
-     * Be aware that this will be called from the ComputerCraft Lua thread, and must be thread-safe
-     * when interacting with Minecraft objects.
+     * Be aware that will be called from both the server thread and ComputerCraft Lua thread, and so must be thread-safe
+     * and reentrant.
      *
-     * @param computer The interface to the computer that is being attached. Remember that multiple
-     *                 computers can be attached to a peripheral at once.
+     * @param computer The interface to the computer that is being attached. Remember that multiple computers can be
+     *                 attached to a peripheral at once.
      * @see #detach
      */
     default void attach( @Nonnull IComputerAccess computer )
@@ -96,19 +97,21 @@ public interface IPeripheral
     }
 
     /**
-     * Is called when a computer is detaching from the peripheral.
+     * Called when a computer is detaching from the peripheral.
      *
-     * This will occur when a computer shuts down, when the peripheral is removed while attached to computers,
-     * or when a turtle moves away from a square attached to a peripheral. This method can be used to keep track of
-     * which computers are attached to the peripheral, or to take action when detachment
-     * occurs.
+     * This will occur when a computer shuts down, when the peripheral is removed while attached to computers, when a
+     * turtle moves away from a block attached to a peripheral, or when a wired modem adjacent to this peripheral is
+     * detached.
      *
-     * Be aware that this will be called from the ComputerCraft Lua thread, and must be thread-safe
-     * when interacting with Minecraft objects.
+     * This method can be used to keep track of which computers are attached to the peripheral, or to take action when
+     * detachment occurs.
      *
-     * @param computer The interface to the computer that is being detached. Remember that multiple
-     *                 computers can be attached to a peripheral at once.
-     * @see #detach
+     * Be aware that this will be called from both the server and ComputerCraft Lua thread, and must be thread-safe
+     * and reentrant.
+     *
+     * @param computer The interface to the computer that is being detached. Remember that multiple computers can be
+     *                 attached to a peripheral at once.
+     * @see #attach
      */
     default void detach( @Nonnull IComputerAccess computer )
     {

src/main/java/dan200/computercraft/api/peripheral/IPeripheralProvider.java

@@ -6,8 +6,9 @@
 
 package dan200.computercraft.api.peripheral;
 
-import net.minecraft.util.EnumFacing;
+import net.minecraft.block.entity.BlockEntity;
 import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.Direction;
 import net.minecraft.world.World;
 
 import javax.annotation.Nonnull;
@@ -16,6 +17,9 @@ import javax.annotation.Nullable;
 /**
  * This interface is used to create peripheral implementations for blocks.
  *
+ * If you have a {@link BlockEntity} which acts as a peripheral, you may alternatively implement
+ * {@link IPeripheralTile}.
+ *
  * @see dan200.computercraft.api.ComputerCraftAPI#registerPeripheralProvider(IPeripheralProvider)
  */
 @FunctionalInterface
@@ -31,5 +35,5 @@ public interface IPeripheralProvider
      * @see dan200.computercraft.api.ComputerCraftAPI#registerPeripheralProvider(IPeripheralProvider)
      */
     @Nullable
-    IPeripheral getPeripheral( @Nonnull World world, @Nonnull BlockPos pos, @Nonnull EnumFacing side );
+    IPeripheral getPeripheral( @Nonnull World world, @Nonnull BlockPos pos, @Nonnull Direction side );
 }

src/main/java/dan200/computercraft/api/peripheral/IPeripheralTile.java

@@ -0,0 +1,32 @@
+/*
+ * This file is part of the public ComputerCraft API - http://www.computercraft.info
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
+ * For help using the API, and posting your mods, visit the forums at computercraft.info.
+ */
+package dan200.computercraft.api.peripheral;
+
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.Direction;
+import net.minecraft.world.World;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+
+/**
+ * A {@link net.minecraft.block.entity.BlockEntity} which may act as a peripheral.
+ *
+ * If you need more complex capabilities (such as handling TEs not belonging to your mod), you should use
+ * {@link IPeripheralProvider}.
+ */
+public interface IPeripheralTile
+{
+    /**
+     * Get the peripheral on the given {@code side}.
+     *
+     * @param side The side to get the peripheral from.
+     * @return A peripheral, or {@code null} if there is not a peripheral here.
+     * @see IPeripheralProvider#getPeripheral(World, BlockPos, Direction)
+     */
+    @Nullable
+    IPeripheral getPeripheral( @Nonnull Direction side );
+}

src/main/java/dan200/computercraft/api/peripheral/IWorkMonitor.java

@@ -0,0 +1,78 @@
+/*
+ * This file is part of ComputerCraft - http://www.computercraft.info
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
+ * Send enquiries to dratcliffe@gmail.com
+ */
+
+package dan200.computercraft.api.peripheral;
+
+import javax.annotation.Nonnull;
+import java.util.Objects;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Monitors "work" associated with a computer, keeping track of how much a computer has done, and ensuring every
+ * computer receives a fair share of any processing time.
+ *
+ * This is primarily intended for work done by peripherals on the main thread (such as on a tile entity's tick), but
+ * could be used for other purposes (such as complex computations done on another thread).
+ *
+ * Before running a task, one should call {@link #canWork()} to determine if the computer is currently allowed to
+ * execute work. If that returns true, you should execute the task and use {@link #trackWork(long, TimeUnit)} to inform
+ * the monitor how long that task took.
+ *
+ * Alternatively, use {@link #runWork(Runnable)} to run and keep track of work.
+ *
+ * @see IComputerAccess#getMainThreadMonitor()
+ */
+public interface IWorkMonitor
+{
+    /**
+     * If the owning computer is currently allowed to execute work.
+     *
+     * @return If we can execute work right now.
+     */
+    boolean canWork();
+
+    /**
+     * If the owning computer is currently allowed to execute work, and has ample time to do so.
+     *
+     * This is effectively a more restrictive form of {@link #canWork()}. One should use that in order to determine if
+     * you may do an initial piece of work, and shouldWork to determine if any additional task may be performed.
+     *
+     * @return If we should execute work right now.
+     */
+    boolean shouldWork();
+
+    /**
+     * Inform the monitor how long some piece of work took to execute.
+     *
+     * @param time The time some task took to run
+     * @param unit The unit that {@code time} was measured in.
+     */
+    void trackWork( long time, @Nonnull TimeUnit unit );
+
+    /**
+     * Run a task if possible, and inform the monitor of how long it took.
+     *
+     * @param runnable The task to run.
+     * @return If the task was actually run (namely, {@link #canWork()} returned {@code true}).
+     */
+    default boolean runWork( @Nonnull Runnable runnable )
+    {
+        Objects.requireNonNull( runnable, "runnable should not be null" );
+        if( !canWork() ) return false;
+
+        long start = System.nanoTime();
+        try
+        {
+            runnable.run();
+        }
+        finally
+        {
+            trackWork( System.nanoTime() - start, TimeUnit.NANOSECONDS );
+        }
+
+        return true;
+    }
+}

src/main/java/dan200/computercraft/api/peripheral/package-info.java

@@ -1,10 +0,0 @@
-/*
- * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
- * For help using the API, and posting your mods, visit the forums at computercraft.info.
- */
-
-@API( owner = "ComputerCraft", provides = "ComputerCraft|API|Peripheral", apiVersion = "${version}" )
-package dan200.computercraft.api.peripheral;
-
-import net.minecraftforge.fml.common.API;

src/main/java/dan200/computercraft/api/permissions/ITurtlePermissionProvider.java

@@ -1,42 +0,0 @@
-/*
- * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
- * For help using the API, and posting your mods, visit the forums at computercraft.info.
- */
-
-package dan200.computercraft.api.permissions;
-
-import net.minecraft.util.math.BlockPos;
-import net.minecraft.world.World;
-
-import javax.annotation.Nonnull;
-
-/**
- * This interface is used to restrict where turtles can move or build.
- *
- * Turtles will call these methods before attempting to perform an action, allowing them to be cancelled.
- *
- * @see dan200.computercraft.api.ComputerCraftAPI#registerPermissionProvider(ITurtlePermissionProvider)
- */
-public interface ITurtlePermissionProvider
-{
-    /**
-     * Determine whether a block can be entered by a turtle.
-     *
-     * @param world The world the block exists in
-     * @param pos   The location of the block.
-     * @return Whether the turtle can move into this block.
-     */
-    boolean isBlockEnterable( @Nonnull World world, @Nonnull BlockPos pos );
-
-    /**
-     * Determine whether a block can be modified by a turtle.
-     *
-     * This includes breaking and placing blocks.
-     *
-     * @param world The world the block exists in
-     * @param pos   The location of the block.
-     * @return Whether the turtle can modify this block.
-     */
-    boolean isBlockEditable( @Nonnull World world, @Nonnull BlockPos pos );
-}

src/main/java/dan200/computercraft/api/permissions/package-info.java

@@ -1,10 +0,0 @@
-/*
- * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
- * For help using the API, and posting your mods, visit the forums at computercraft.info.
- */
-
-@API( owner = "ComputerCraft", provides = "ComputerCraft|API|Permissions", apiVersion = "${version}" )
-package dan200.computercraft.api.permissions;
-
-import net.minecraftforge.fml.common.API;

src/main/java/dan200/computercraft/api/pocket/AbstractPocketUpgrade.java

@@ -0,0 +1,64 @@
+/*
+ * This file is part of ComputerCraft - http://www.computercraft.info
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
+ * Send enquiries to dratcliffe@gmail.com
+ */
+
+package dan200.computercraft.api.pocket;
+
+import net.minecraft.item.ItemProvider;
+import net.minecraft.item.ItemStack;
+import net.minecraft.util.Identifier;
+import net.minecraft.util.SystemUtil;
+
+import javax.annotation.Nonnull;
+
+/**
+ * A base class for {@link IPocketUpgrade}s.
+ *
+ * One does not have to use this, but it does provide a convenient template.
+ */
+public abstract class AbstractPocketUpgrade implements IPocketUpgrade
+{
+    private final Identifier id;
+    private final String adjective;
+    private final ItemStack stack;
+
+    protected AbstractPocketUpgrade( Identifier id, String adjective, ItemStack stack )
+    {
+        this.id = id;
+        this.adjective = adjective;
+        this.stack = stack;
+    }
+
+    protected AbstractPocketUpgrade( Identifier identifier, String adjective, ItemProvider item )
+    {
+        this( identifier, adjective, new ItemStack( item ) );
+    }
+
+    protected AbstractPocketUpgrade( Identifier id, ItemProvider item )
+    {
+        this( id, SystemUtil.createTranslationKey( "upgrade", id ) + ".adjective", new ItemStack( item ) );
+    }
+
+    @Nonnull
+    @Override
+    public final Identifier getUpgradeID()
+    {
+        return id;
+    }
+
+    @Nonnull
+    @Override
+    public final String getUnlocalisedAdjective()
+    {
+        return adjective;
+    }
+
+    @Nonnull
+    @Override
+    public final ItemStack getCraftingItem()
+    {
+        return stack;
+    }
+}

src/main/java/dan200/computercraft/api/pocket/IPocketAccess.java

@@ -8,8 +8,8 @@ package dan200.computercraft.api.pocket;
 
 import dan200.computercraft.api.peripheral.IPeripheral;
 import net.minecraft.entity.Entity;
-import net.minecraft.nbt.NBTTagCompound;
-import net.minecraft.util.ResourceLocation;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.util.Identifier;
 
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
@@ -23,7 +23,9 @@ public interface IPocketAccess
     /**
      * Gets the entity holding this item.
      *
-     * @return The holding entity. This may be {@code null}.
+     * This must be called on the server thread.
+     *
+     * @return The holding entity, or {@code null} if none exists.
      */
     @Nullable
     Entity getEntity();
@@ -73,7 +75,7 @@ public interface IPocketAccess
      * @see #updateUpgradeNBTData()
      */
     @Nonnull
-    NBTTagCompound getUpgradeNBTData();
+    CompoundTag getUpgradeNBTData();
 
     /**
      * Mark the upgrade-specific NBT as dirty.
@@ -93,5 +95,5 @@ public interface IPocketAccess
      * @return A collection of all upgrade names.
      */
     @Nonnull
-    Map<ResourceLocation, IPeripheral> getUpgrades();
+    Map<Identifier, IPeripheral> getUpgrades();
 }

src/main/java/dan200/computercraft/api/pocket/IPocketUpgrade.java

@@ -10,7 +10,7 @@ import dan200.computercraft.api.ComputerCraftAPI;
 import dan200.computercraft.api.peripheral.IPeripheral;
 import dan200.computercraft.api.turtle.ITurtleUpgrade;
 import net.minecraft.item.ItemStack;
-import net.minecraft.util.ResourceLocation;
+import net.minecraft.util.Identifier;
 import net.minecraft.world.World;
 
 import javax.annotation.Nonnull;
@@ -19,7 +19,7 @@ import javax.annotation.Nullable;
 /**
  * Additional peripherals for pocket computers.
  *
- * This is similar to {@link dan200.computercraft.api.turtle.ITurtleUpgrade}.
+ * This is similar to {@link ITurtleUpgrade}.
  */
 public interface IPocketUpgrade
 {
@@ -36,7 +36,7 @@ public interface IPocketUpgrade
      * @see ComputerCraftAPI#registerPocketUpgrade(IPocketUpgrade)
      */
     @Nonnull
-    ResourceLocation getUpgradeID();
+    Identifier getUpgradeID();
 
     /**
      * Return an unlocalised string to describe the type of pocket computer this upgrade provides.
@@ -54,6 +54,9 @@ public interface IPocketUpgrade
      * pocket computer which holds this upgrade. This item stack is also used to determine the upgrade given by
      * {@code pocket.equip()}/{@code pocket.unequip()}.
      *
+     * Ideally this should be constant over a session. It is recommended that you cache
+     * the item too, in order to prevent constructing it every time the method is called.
+     *
      * @return The item stack used for crafting. This can be {@link ItemStack#EMPTY} if crafting is disabled.
      */
     @Nonnull

src/main/java/dan200/computercraft/api/redstone/IBundledRedstoneProvider.java

@@ -6,8 +6,8 @@
 
 package dan200.computercraft.api.redstone;
 
-import net.minecraft.util.EnumFacing;
 import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.Direction;
 import net.minecraft.world.World;
 
 import javax.annotation.Nonnull;
@@ -30,5 +30,5 @@ public interface IBundledRedstoneProvider
      * handle this block.
      * @see dan200.computercraft.api.ComputerCraftAPI#registerBundledRedstoneProvider(IBundledRedstoneProvider)
      */
-    int getBundledRedstoneOutput( @Nonnull World world, @Nonnull BlockPos pos, @Nonnull EnumFacing side );
+    int getBundledRedstoneOutput( @Nonnull World world, @Nonnull BlockPos pos, @Nonnull Direction side );
 }

src/main/java/dan200/computercraft/api/redstone/package-info.java

@@ -1,10 +0,0 @@
-/*
- * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
- * For help using the API, and posting your mods, visit the forums at computercraft.info.
- */
-
-@API( owner = "ComputerCraft", provides = "ComputerCraft|API|Redstone", apiVersion = "${version}" )
-package dan200.computercraft.api.redstone;
-
-import net.minecraftforge.fml.common.API;

src/main/java/dan200/computercraft/api/turtle/ITurtleAccess.java

@@ -10,13 +10,12 @@ import com.mojang.authlib.GameProfile;
 import dan200.computercraft.api.lua.ILuaContext;
 import dan200.computercraft.api.lua.LuaException;
 import dan200.computercraft.api.peripheral.IPeripheral;
-import net.minecraft.inventory.IInventory;
-import net.minecraft.nbt.NBTTagCompound;
-import net.minecraft.util.EnumFacing;
+import net.minecraft.inventory.Inventory;
+import net.minecraft.nbt.CompoundTag;
 import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.Direction;
 import net.minecraft.util.math.Vec3d;
 import net.minecraft.world.World;
-import net.minecraftforge.items.IItemHandlerModifiable;
 
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
@@ -54,8 +53,7 @@ public interface ITurtleAccess
      * @param world The new world to move it to
      * @param pos   The new position to move it to.
      * @return Whether the movement was successful. It may fail if the block was not loaded or the block placement
-     * was cancelled. Note this will not check
-     * {@link dan200.computercraft.api.permissions.ITurtlePermissionProvider#isBlockEnterable(World, BlockPos)}.
+     * was cancelled.
      * @throws UnsupportedOperationException When attempting to teleport on the client side.
      */
     boolean teleportTo( @Nonnull World world, @Nonnull BlockPos pos );
@@ -84,10 +82,10 @@ public interface ITurtleAccess
      * Returns the world direction the turtle is currently facing.
      *
      * @return The world direction the turtle is currently facing.
-     * @see #setDirection(EnumFacing)
+     * @see #setDirection(Direction)
      */
     @Nonnull
-    EnumFacing getDirection();
+    Direction getDirection();
 
     /**
      * Set the direction the turtle is facing. Note that this will not play a rotation animation, you will also need to
@@ -96,7 +94,7 @@ public interface ITurtleAccess
      * @param dir The new direction to set. This should be on either the x or z axis (so north, south, east or west).
      * @see #getDirection()
      */
-    void setDirection( @Nonnull EnumFacing dir );
+    void setDirection( @Nonnull Direction dir );
 
     /**
      * Get the currently selected slot in the turtle's inventory.
@@ -148,21 +146,9 @@ public interface ITurtleAccess
      * Get the inventory of this turtle
      *
      * @return This turtle's inventory
-     * @see #getItemHandler()
      */
     @Nonnull
-    IInventory getInventory();
-
-    /**
-     * Get the inventory of this turtle as an {@link IItemHandlerModifiable}.
-     *
-     * @return This turtle's inventory
-     * @see #getInventory()
-     * @see IItemHandlerModifiable
-     * @see net.minecraftforge.items.CapabilityItemHandler#ITEM_HANDLER_CAPABILITY
-     */
-    @Nonnull
-    IItemHandlerModifiable getItemHandler();
+    Inventory getInventory();
 
     /**
      * Determine whether this turtle will require fuel when performing actions.
@@ -291,7 +277,7 @@ public interface ITurtleAccess
      * @see #updateUpgradeNBTData(TurtleSide)
      */
     @Nonnull
-    NBTTagCompound getUpgradeNBTData( @Nullable TurtleSide side );
+    CompoundTag getUpgradeNBTData( @Nullable TurtleSide side );
 
     /**
      * Mark the upgrade-specific data as dirty on a specific side. This is required for the data to be synced to the

src/main/java/dan200/computercraft/api/turtle/ITurtleUpgrade.java

@@ -10,15 +10,13 @@ import dan200.computercraft.api.ComputerCraftAPI;
 import dan200.computercraft.api.peripheral.IPeripheral;
 import dan200.computercraft.api.turtle.event.TurtleAttackEvent;
 import dan200.computercraft.api.turtle.event.TurtleBlockEvent;
-import net.minecraft.client.renderer.block.model.IBakedModel;
-import net.minecraft.client.renderer.block.model.ModelResourceLocation;
+import net.fabricmc.api.EnvType;
+import net.fabricmc.api.Environment;
+import net.minecraft.client.render.model.BakedModel;
+import net.minecraft.client.util.ModelIdentifier;
 import net.minecraft.item.ItemStack;
-import net.minecraft.util.EnumFacing;
-import net.minecraft.util.ResourceLocation;
-import net.minecraftforge.event.entity.player.AttackEntityEvent;
-import net.minecraftforge.event.world.BlockEvent;
-import net.minecraftforge.fml.relauncher.Side;
-import net.minecraftforge.fml.relauncher.SideOnly;
+import net.minecraft.util.Identifier;
+import net.minecraft.util.math.Direction;
 import org.apache.commons.lang3.tuple.Pair;
 
 import javax.annotation.Nonnull;
@@ -42,18 +40,7 @@ public interface ITurtleUpgrade
      * @see ComputerCraftAPI#registerTurtleUpgrade(ITurtleUpgrade)
      */
     @Nonnull
-    ResourceLocation getUpgradeID();
-
-    /**
-     * Gets a numerical identifier representing this type of turtle upgrade,
-     * for backwards compatibility with pre-1.76 worlds. If your upgrade was
-     * not released for older ComputerCraft versions, you can return -1 here.
-     * The turtle will fail registration if an already used positive ID is specified.
-     *
-     * @return The legacy ID, or -1 if is needed.
-     * @see ComputerCraftAPI#registerTurtleUpgrade(ITurtleUpgrade)
-     */
-    int getLegacyUpgradeID();
+    Identifier getUpgradeID();
 
     /**
      * Return an unlocalised string to describe this type of turtle in turtle item names.
@@ -79,6 +66,9 @@ public interface ITurtleUpgrade
      * with to create a turtle which holds this upgrade. This item stack is also used
      * to determine the upgrade given by {@code turtle.equip()}
      *
+     * Ideally this should be constant over a session. It is recommended that you cache
+     * the item too, in order to prevent constructing it every time the method is called.
+     *
      * @return The item stack to craft with, or {@link ItemStack#EMPTY} if it cannot be crafted.
      */
     @Nonnull
@@ -106,8 +96,8 @@ public interface ITurtleUpgrade
      * Will only be called for Tool turtle. Called when turtle.dig() or turtle.attack() is called
      * by the turtle, and the tool is required to do some work.
      *
-     * Conforming implementations should fire {@link BlockEvent.BreakEvent} and {@link TurtleBlockEvent.Dig}for digging,
-     * {@link AttackEntityEvent} and {@link TurtleAttackEvent} for attacking.
+     * Conforming implementations should fire {@code BlockEvent.BreakEvent} and {@link TurtleBlockEvent.Dig}for digging,
+     * {@code AttackEntityEvent} and {@link TurtleAttackEvent} for attacking.
      *
      * @param turtle    Access to the turtle that the tool resides on.
      * @param side      Which side of the turtle (left or right) the tool resides on.
@@ -121,7 +111,7 @@ public interface ITurtleUpgrade
      * to be called.
      */
     @Nonnull
-    default TurtleCommandResult useTool( @Nonnull ITurtleAccess turtle, @Nonnull TurtleSide side, @Nonnull TurtleVerb verb, @Nonnull EnumFacing direction )
+    default TurtleCommandResult useTool( @Nonnull ITurtleAccess turtle, @Nonnull TurtleSide side, @Nonnull TurtleVerb verb, @Nonnull Direction direction )
     {
         return TurtleCommandResult.failure();
     }
@@ -129,8 +119,8 @@ public interface ITurtleUpgrade
     /**
      * Called to obtain the model to be used when rendering a turtle peripheral.
      *
-     * This can be obtained from {@link net.minecraft.client.renderer.ItemModelMesher#getItemModel(ItemStack)},
-     * {@link net.minecraft.client.renderer.block.model.ModelManager#getModel(ModelResourceLocation)} or any other
+     * This can be obtained from {@link net.minecraft.client.render.item.ItemModels#getModel(ItemStack)},
+     * {@link net.minecraft.client.render.model.BakedModelManager#getModel(ModelIdentifier)} or any other
      * source.
      *
      * @param turtle Access to the turtle that the upgrade resides on. This will be null when getting item models!
@@ -139,8 +129,8 @@ public interface ITurtleUpgrade
      * a transformation of {@code null} has the same effect as the identify matrix.
      */
     @Nonnull
-    @SideOnly( Side.CLIENT )
-    Pair<IBakedModel, Matrix4f> getModel( @Nullable ITurtleAccess turtle, @Nonnull TurtleSide side );
+    @Environment( EnvType.CLIENT )
+    Pair<BakedModel, Matrix4f> getModel( @Nullable ITurtleAccess turtle, @Nonnull TurtleSide side );
 
     /**
      * Called once per tick for each turtle which has the upgrade equipped.

src/main/java/dan200/computercraft/api/turtle/TurtleCommandResult.java

@@ -6,7 +6,7 @@
 
 package dan200.computercraft.api.turtle;
 
-import net.minecraft.util.EnumFacing;
+import net.minecraft.util.math.Direction;
 
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
@@ -15,7 +15,7 @@ import javax.annotation.Nullable;
  * Used to indicate the result of executing a turtle command.
  *
  * @see ITurtleCommand#execute(ITurtleAccess)
- * @see ITurtleUpgrade#useTool(ITurtleAccess, TurtleSide, TurtleVerb, EnumFacing)
+ * @see ITurtleUpgrade#useTool(ITurtleAccess, TurtleSide, TurtleVerb, Direction)
  */
 public final class TurtleCommandResult
 {

src/main/java/dan200/computercraft/api/turtle/TurtleVerb.java

@@ -6,14 +6,14 @@
 
 package dan200.computercraft.api.turtle;
 
-import net.minecraft.util.EnumFacing;
+import net.minecraft.util.math.Direction;
 
 /**
  * An enum representing the different actions that an {@link ITurtleUpgrade} of type Tool may be called on to perform by
  * a turtle.
  *
  * @see ITurtleUpgrade#getType()
- * @see ITurtleUpgrade#useTool(ITurtleAccess, TurtleSide, TurtleVerb, EnumFacing)
+ * @see ITurtleUpgrade#useTool(ITurtleAccess, TurtleSide, TurtleVerb, Direction)
  */
 public enum TurtleVerb
 {

src/main/java/dan200/computercraft/api/turtle/event/FakePlayer.java

@@ -0,0 +1,26 @@
+/*
+ * This file is part of ComputerCraft - http://www.computercraft.info
+ * Copyright Daniel Ratcliffe, 2011-2018. Do not distribute without permission.
+ * Send enquiries to dratcliffe@gmail.com
+ */
+
+package dan200.computercraft.api.turtle.event;
+
+import com.mojang.authlib.GameProfile;
+import net.minecraft.server.network.ServerPlayerEntity;
+import net.minecraft.server.network.ServerPlayerInteractionManager;
+import net.minecraft.server.world.ServerWorld;
+
+/**
+ * A wrapper for {@link ServerPlayerEntity} which denotes a "fake" player.
+ *
+ * Please note that this does not implement any of the traditional fake player behaviour. It simply exists to prevent
+ * me passing in normal players.
+ */
+public class FakePlayer extends ServerPlayerEntity
+{
+    public FakePlayer( ServerWorld world, GameProfile gameProfile )
+    {
+        super( world.getServer(), world, gameProfile, new ServerPlayerInteractionManager( world ) );
+    }
+}

src/main/java/dan200/computercraft/api/turtle/event/TurtleActionEvent.java

@@ -8,7 +8,6 @@ package dan200.computercraft.api.turtle.event;
 
 import dan200.computercraft.api.turtle.ITurtleAccess;
 import dan200.computercraft.api.turtle.TurtleCommandResult;
-import net.minecraftforge.fml.common.eventhandler.Cancelable;
 
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
@@ -17,11 +16,11 @@ import java.util.Objects;
 /**
  * An event fired when a turtle is performing a known action.
  */
-@Cancelable
 public class TurtleActionEvent extends TurtleEvent
 {
     private final TurtleAction action;
     private String failureMessage;
+    private boolean cancelled = false;
 
     public TurtleActionEvent( @Nonnull ITurtleAccess turtle, @Nonnull TurtleAction action )
     {
@@ -45,7 +44,6 @@ public class TurtleActionEvent extends TurtleEvent
      * @see TurtleCommandResult#failure()
      * @deprecated Use {@link #setCanceled(boolean, String)} instead.
      */
-    @Override
     @Deprecated
     public void setCanceled( boolean cancel )
     {
@@ -63,7 +61,7 @@ public class TurtleActionEvent extends TurtleEvent
      */
     public void setCanceled( boolean cancel, @Nullable String failureMessage )
     {
-        super.setCanceled( cancel );
+        this.cancelled = true;
         this.failureMessage = cancel ? failureMessage : null;
     }
 
@@ -79,4 +77,15 @@ public class TurtleActionEvent extends TurtleEvent
     {
         return failureMessage;
     }
+
+    /**
+     * Determine if this event is cancelled
+     *
+     * @return If this event is cancelled
+     * @see #setCanceled(boolean, String)
+     */
+    public boolean isCancelled()
+    {
+        return cancelled;
+    }
 }

src/main/java/dan200/computercraft/api/turtle/event/TurtleAttackEvent.java

@@ -11,9 +11,7 @@ import dan200.computercraft.api.turtle.ITurtleUpgrade;
 import dan200.computercraft.api.turtle.TurtleSide;
 import dan200.computercraft.api.turtle.TurtleVerb;
 import net.minecraft.entity.Entity;
-import net.minecraft.util.EnumFacing;
-import net.minecraftforge.common.util.FakePlayer;
-import net.minecraftforge.event.entity.player.AttackEntityEvent;
+import net.minecraft.util.math.Direction;
 
 import javax.annotation.Nonnull;
 import java.util.Objects;
@@ -21,10 +19,11 @@ import java.util.Objects;
 /**
  * Fired when a turtle attempts to attack an entity.
  *
- * This must be fired by {@link ITurtleUpgrade#useTool(ITurtleAccess, TurtleSide, TurtleVerb, EnumFacing)},
+ * This must be fired by {@link ITurtleUpgrade#useTool(ITurtleAccess, TurtleSide, TurtleVerb, Direction)},
  * as the base {@code turtle.attack()} command does not fire it.
  *
- * Note that such commands should also fire {@link AttackEntityEvent}, so you do not need to listen to both.
+ * Note that such commands should also fire {@link net.fabricmc.fabric.api.event.player.AttackEntityCallback}, so you do
+ * not need to listen to both.
  *
  * @see TurtleAction#ATTACK
  */

src/main/java/dan200/computercraft/api/turtle/event/TurtleBlockEvent.java

@@ -12,14 +12,11 @@ import dan200.computercraft.api.turtle.ITurtleAccess;
 import dan200.computercraft.api.turtle.ITurtleUpgrade;
 import dan200.computercraft.api.turtle.TurtleSide;
 import dan200.computercraft.api.turtle.TurtleVerb;
-import net.minecraft.block.state.IBlockState;
+import net.minecraft.block.BlockState;
 import net.minecraft.item.ItemStack;
-import net.minecraft.util.EnumFacing;
 import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.Direction;
 import net.minecraft.world.World;
-import net.minecraftforge.common.util.FakePlayer;
-import net.minecraftforge.event.world.BlockEvent;
-import net.minecraftforge.fml.common.eventhandler.Cancelable;
 
 import javax.annotation.Nonnull;
 import java.util.Map;
@@ -37,7 +34,6 @@ import java.util.Objects;
  * Be aware that some events (such as {@link TurtleInventoryEvent}) do not necessarily interact
  * with a block, simply objects within that block space.
  */
-@Cancelable
 public abstract class TurtleBlockEvent extends TurtlePlayerEvent
 {
     private final World world;
@@ -77,21 +73,21 @@ public abstract class TurtleBlockEvent extends TurtlePlayerEvent
     /**
      * Fired when a turtle attempts to dig a block.
      *
-     * This must be fired by {@link ITurtleUpgrade#useTool(ITurtleAccess, TurtleSide, TurtleVerb, EnumFacing)},
+     * This must be fired by {@link ITurtleUpgrade#useTool(ITurtleAccess, TurtleSide, TurtleVerb, Direction)},
      * as the base {@code turtle.dig()} command does not fire it.
      *
-     * Note that such commands should also fire {@link BlockEvent.BreakEvent}, so you do not need to listen to both.
+     * Note that such commands should also fire {@link net.fabricmc.fabric.api.event.player.AttackBlockCallback}, so you
+     * do not need to listen to both.
      *
      * @see TurtleAction#DIG
      */
-    @Cancelable
     public static class Dig extends TurtleBlockEvent
     {
-        private final IBlockState block;
+        private final BlockState block;
         private final ITurtleUpgrade upgrade;
         private final TurtleSide side;
 
-        public Dig( @Nonnull ITurtleAccess turtle, @Nonnull FakePlayer player, @Nonnull World world, @Nonnull BlockPos pos, @Nonnull IBlockState block, @Nonnull ITurtleUpgrade upgrade, @Nonnull TurtleSide side )
+        public Dig( @Nonnull ITurtleAccess turtle, @Nonnull FakePlayer player, @Nonnull World world, @Nonnull BlockPos pos, @Nonnull BlockState block, @Nonnull ITurtleUpgrade upgrade, @Nonnull TurtleSide side )
         {
             super( turtle, TurtleAction.DIG, player, world, pos );
 
@@ -109,7 +105,7 @@ public abstract class TurtleBlockEvent extends TurtlePlayerEvent
          * @return The block which is going to be broken.
          */
         @Nonnull
-        public IBlockState getBlock()
+        public BlockState getBlock()
         {
             return block;
         }
@@ -142,7 +138,6 @@ public abstract class TurtleBlockEvent extends TurtlePlayerEvent
      *
      * @see TurtleAction#MOVE
      */
-    @Cancelable
     public static class Move extends TurtleBlockEvent
     {
         public Move( @Nonnull ITurtleAccess turtle, @Nonnull FakePlayer player, @Nonnull World world, @Nonnull BlockPos pos )
@@ -156,7 +151,6 @@ public abstract class TurtleBlockEvent extends TurtlePlayerEvent
      *
      * @see TurtleAction#PLACE
      */
-    @Cancelable
     public static class Place extends TurtleBlockEvent
     {
         private final ItemStack stack;
@@ -188,13 +182,12 @@ public abstract class TurtleBlockEvent extends TurtlePlayerEvent
      *
      * @see TurtleAction#INSPECT
      */
-    @Cancelable
     public static class Inspect extends TurtleBlockEvent
     {
-        private final IBlockState state;
+        private final BlockState state;
         private final Map<String, Object> data;
 
-        public Inspect( @Nonnull ITurtleAccess turtle, @Nonnull FakePlayer player, @Nonnull World world, @Nonnull BlockPos pos, @Nonnull IBlockState state, @Nonnull Map<String, Object> data )
+        public Inspect( @Nonnull ITurtleAccess turtle, @Nonnull FakePlayer player, @Nonnull World world, @Nonnull BlockPos pos, @Nonnull BlockState state, @Nonnull Map<String, Object> data )
         {
             super( turtle, TurtleAction.INSPECT, player, world, pos );
 
@@ -210,7 +203,7 @@ public abstract class TurtleBlockEvent extends TurtlePlayerEvent
          * @return The inspected block state.
          */
         @Nonnull
-        public IBlockState getState()
+        public BlockState getState()
         {
             return state;
         }
@@ -229,7 +222,7 @@ public abstract class TurtleBlockEvent extends TurtlePlayerEvent
         /**
          * Add new information to the inspection result. Note this will override fields with the same name.
          *
-         * @param newData The data to add. Note all values should be convertable to Lua (see
+         * @param newData The data to add. Note all values should be convertible to Lua (see
          *                {@link dan200.computercraft.api.peripheral.IPeripheral#callMethod(IComputerAccess, ILuaContext, int, Object[])}).
          */
         public void addData( @Nonnull Map<String, ?> newData )

src/main/java/dan200/computercraft/api/turtle/event/TurtleEvent.java

@@ -6,8 +6,8 @@
 
 package dan200.computercraft.api.turtle.event;
 
+import com.google.common.eventbus.EventBus;
 import dan200.computercraft.api.turtle.ITurtleAccess;
-import net.minecraftforge.fml.common.eventhandler.Event;
 
 import javax.annotation.Nonnull;
 import java.util.Objects;
@@ -20,8 +20,10 @@ import java.util.Objects;
  *
  * @see TurtleActionEvent
  */
-public abstract class TurtleEvent extends Event
+public abstract class TurtleEvent
 {
+    public static final EventBus EVENT_BUS = new EventBus();
+
     private final ITurtleAccess turtle;
 
     protected TurtleEvent( @Nonnull ITurtleAccess turtle )
@@ -40,4 +42,10 @@ public abstract class TurtleEvent extends Event
     {
         return turtle;
     }
+
+    public static boolean post( TurtleActionEvent event )
+    {
+        EVENT_BUS.post( event );
+        return event.isCancelled();
+    }
 }

src/main/java/dan200/computercraft/api/turtle/event/TurtleInspectItemEvent.java

@@ -0,0 +1,74 @@
+/*
+ * This file is part of ComputerCraft - http://www.computercraft.info
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
+ * Send enquiries to dratcliffe@gmail.com
+ */
+
+package dan200.computercraft.api.turtle.event;
+
+import dan200.computercraft.api.lua.ILuaContext;
+import dan200.computercraft.api.peripheral.IComputerAccess;
+import dan200.computercraft.api.turtle.ITurtleAccess;
+import net.minecraft.item.ItemStack;
+
+import javax.annotation.Nonnull;
+import java.util.Map;
+import java.util.Objects;
+
+/**
+ * Fired when a turtle gathers data on an item in its inventory.
+ *
+ * You may prevent items being inspected, or add additional information to the result. Be aware that this is fired on
+ * the computer thread, and so any operations on it must be thread safe.
+ *
+ * @see TurtleAction#INSPECT_ITEM
+ */
+public class TurtleInspectItemEvent extends TurtleActionEvent
+{
+    private final ItemStack stack;
+    private final Map<String, Object> data;
+
+    public TurtleInspectItemEvent( @Nonnull ITurtleAccess turtle, @Nonnull ItemStack stack, @Nonnull Map<String, Object> data )
+    {
+        super( turtle, TurtleAction.INSPECT_ITEM );
+
+        Objects.requireNonNull( stack, "stack cannot be null" );
+        Objects.requireNonNull( data, "data cannot be null" );
+        this.stack = stack;
+        this.data = data;
+    }
+
+    /**
+     * The item which is currently being inspected.
+     *
+     * @return The item stack which is being inspected. This should <b>not</b> be modified.
+     */
+    @Nonnull
+    public ItemStack getStack()
+    {
+        return stack;
+    }
+
+    /**
+     * Get the "inspection data" from this item, which will be returned to the user.
+     *
+     * @return This items's inspection data.
+     */
+    @Nonnull
+    public Map<String, Object> getData()
+    {
+        return data;
+    }
+
+    /**
+     * Add new information to the inspection result. Note this will override fields with the same name.
+     *
+     * @param newData The data to add. Note all values should be convertible to Lua (see
+     *                {@link dan200.computercraft.api.peripheral.IPeripheral#callMethod(IComputerAccess, ILuaContext, int, Object[])}).
+     */
+    public void addData( @Nonnull Map<String, ?> newData )
+    {
+        Objects.requireNonNull( newData, "newData cannot be null" );
+        data.putAll( newData );
+    }
+}

src/main/java/dan200/computercraft/api/turtle/event/TurtleInventoryEvent.java

@@ -7,12 +7,10 @@
 package dan200.computercraft.api.turtle.event;
 
 import dan200.computercraft.api.turtle.ITurtleAccess;
+import net.minecraft.inventory.Inventory;
 import net.minecraft.item.ItemStack;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.World;
-import net.minecraftforge.common.util.FakePlayer;
-import net.minecraftforge.fml.common.eventhandler.Cancelable;
-import net.minecraftforge.items.IItemHandler;
 
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
@@ -21,12 +19,11 @@ import java.util.Objects;
 /**
  * Fired when a turtle attempts to interact with an inventory.
  */
-@Cancelable
 public abstract class TurtleInventoryEvent extends TurtleBlockEvent
 {
-    private final IItemHandler handler;
+    private final Inventory handler;
 
-    protected TurtleInventoryEvent( @Nonnull ITurtleAccess turtle, @Nonnull TurtleAction action, @Nonnull FakePlayer player, @Nonnull World world, @Nonnull BlockPos pos, @Nullable IItemHandler handler )
+    protected TurtleInventoryEvent( @Nonnull ITurtleAccess turtle, @Nonnull TurtleAction action, @Nonnull FakePlayer player, @Nonnull World world, @Nonnull BlockPos pos, @Nullable Inventory handler )
     {
         super( turtle, action, player, world, pos );
         this.handler = handler;
@@ -38,7 +35,7 @@ public abstract class TurtleInventoryEvent extends TurtleBlockEvent
      * @return The inventory being interacted with, {@code null} if the item will be dropped to/sucked from the world.
      */
     @Nullable
-    public IItemHandler getItemHandler()
+    public Inventory getItemHandler()
     {
         return handler;
     }
@@ -48,10 +45,9 @@ public abstract class TurtleInventoryEvent extends TurtleBlockEvent
      *
      * @see TurtleAction#SUCK
      */
-    @Cancelable
     public static class Suck extends TurtleInventoryEvent
     {
-        public Suck( @Nonnull ITurtleAccess turtle, @Nonnull FakePlayer player, @Nonnull World world, @Nonnull BlockPos pos, @Nullable IItemHandler handler )
+        public Suck( @Nonnull ITurtleAccess turtle, @Nonnull FakePlayer player, @Nonnull World world, @Nonnull BlockPos pos, @Nullable Inventory handler )
         {
             super( turtle, TurtleAction.SUCK, player, world, pos, handler );
         }
@@ -62,12 +58,11 @@ public abstract class TurtleInventoryEvent extends TurtleBlockEvent
      *
      * @see TurtleAction#DROP
      */
-    @Cancelable
     public static class Drop extends TurtleInventoryEvent
     {
         private final ItemStack stack;
 
-        public Drop( @Nonnull ITurtleAccess turtle, @Nonnull FakePlayer player, @Nonnull World world, @Nonnull BlockPos pos, @Nullable IItemHandler handler, @Nonnull ItemStack stack )
+        public Drop( @Nonnull ITurtleAccess turtle, @Nonnull FakePlayer player, @Nonnull World world, @Nonnull BlockPos pos, @Nullable Inventory handler, @Nonnull ItemStack stack )
         {
             super( turtle, TurtleAction.DROP, player, world, pos, handler );
 
@@ -78,13 +73,12 @@ public abstract class TurtleInventoryEvent extends TurtleBlockEvent
         /**
          * The item which will be inserted into the inventory/dropped on the ground.
          *
-         * Note that this is a copy of the original stack, and so should not be modified, as that will have no effect.
-         *
-         * @return The item stack which will be dropped.
+         * @return The item stack which will be dropped. This should <b>not</b> be modified.
          */
+        @Nonnull
         public ItemStack getStack()
         {
-            return stack.copy();
+            return stack;
         }
     }
 }

src/main/java/dan200/computercraft/api/turtle/event/TurtlePlayerEvent.java

@@ -7,7 +7,6 @@
 package dan200.computercraft.api.turtle.event;
 
 import dan200.computercraft.api.turtle.ITurtleAccess;
-import net.minecraftforge.common.util.FakePlayer;
 
 import javax.annotation.Nonnull;
 import java.util.Objects;

src/main/java/dan200/computercraft/api/turtle/event/TurtleRefuelEvent.java

@@ -0,0 +1,91 @@
+/*
+ * This file is part of ComputerCraft - http://www.computercraft.info
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
+ * Send enquiries to dratcliffe@gmail.com
+ */
+
+package dan200.computercraft.api.turtle.event;
+
+import dan200.computercraft.api.turtle.ITurtleAccess;
+import net.minecraft.item.ItemStack;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import java.util.Objects;
+
+/**
+ * Fired when a turtle attempts to refuel from an item.
+ *
+ * One may use {@link #setCanceled(boolean, String)} to prevent refueling from this specific item. Additionally, you
+ * may use {@link #setHandler(Handler)} to register a custom fuel provider.
+ */
+public class TurtleRefuelEvent extends TurtleActionEvent
+{
+    private final ItemStack stack;
+    private Handler handler;
+
+    public TurtleRefuelEvent( @Nonnull ITurtleAccess turtle, @Nonnull ItemStack stack )
+    {
+        super( turtle, TurtleAction.REFUEL );
+
+        Objects.requireNonNull( turtle, "turtle cannot be null" );
+        this.stack = stack;
+    }
+
+    /**
+     * Get the stack we are attempting to refuel from.
+     *
+     * Do not modify the returned stack - all modifications should be done within the {@link Handler}.
+     *
+     * @return The stack to refuel from.
+     */
+    public ItemStack getStack()
+    {
+        return stack;
+    }
+
+    /**
+     * Get the refuel handler for this stack.
+     *
+     * @return The refuel handler, or {@code null} if none has currently been set.
+     * @see #setHandler(Handler)
+     */
+    @Nullable
+    public Handler getHandler()
+    {
+        return handler;
+    }
+
+    /**
+     * Set the refuel handler for this stack.
+     *
+     * You should call this if you can actually refuel from this item, and ideally only if there are no existing
+     * handlers.
+     *
+     * @param handler The new refuel handler.
+     * @see #getHandler()
+     */
+    public void setHandler( @Nullable Handler handler )
+    {
+        this.handler = handler;
+    }
+
+    /**
+     * Handles refuelling a turtle from a specific item.
+     */
+    @FunctionalInterface
+    public interface Handler
+    {
+        /**
+         * Refuel a turtle using an item.
+         *
+         * @param turtle The turtle to refuel.
+         * @param stack  The stack to refuel with.
+         * @param slot   The slot the stack resides within. This may be used to modify the inventory afterwards.
+         * @param limit  The maximum number of refuel operations to perform. This will often correspond to the number of
+         *               items to consume.
+         * @return The amount of fuel gained.
+         */
+        int refuel( @Nonnull ITurtleAccess turtle, @Nonnull ItemStack stack, int slot, int limit );
+    }
+}

src/main/java/dan200/computercraft/api/turtle/event/package-info.java

@@ -1,10 +0,0 @@
-/*
- * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
- * For help using the API, and posting your mods, visit the forums at computercraft.info.
- */
-
-@API( owner = "ComputerCraft", provides = "ComputerCraft|API|Turtle|Event", apiVersion = "${version}" )
-package dan200.computercraft.api.turtle.event;
-
-import net.minecraftforge.fml.common.API;

src/main/java/dan200/computercraft/api/turtle/package-info.java

@@ -1,10 +0,0 @@
-/*
- * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
- * For help using the API, and posting your mods, visit the forums at computercraft.info.
- */
-
-@API( owner = "ComputerCraft", provides = "ComputerCraft|API|Turtle", apiVersion = "${version}" )
-package dan200.computercraft.api.turtle;
-
-import net.minecraftforge.fml.common.API;

src/main/java/dan200/computercraft/client/ClientRegistry.java

@@ -0,0 +1,146 @@
+/*
+ * This file is part of ComputerCraft - http://www.computercraft.info
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
+ * Send enquiries to dratcliffe@gmail.com
+ */
+
+package dan200.computercraft.client;
+
+import dan200.computercraft.ComputerCraft;
+import dan200.computercraft.shared.common.IColouredItem;
+import dan200.computercraft.shared.media.items.ItemDisk;
+import dan200.computercraft.shared.pocket.items.ItemPocketComputer;
+import dan200.computercraft.shared.util.Colour;
+import net.fabricmc.fabric.api.client.render.ColorProviderRegistry;
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.client.render.model.BakedModel;
+import net.minecraft.client.render.model.ModelLoader;
+import net.minecraft.client.render.model.ModelRotation;
+import net.minecraft.client.render.model.UnbakedModel;
+import net.minecraft.client.texture.SpriteAtlasTexture;
+
+import java.util.HashSet;
+
+/**
+ * Registers textures and models for items.
+ */
+public final class ClientRegistry
+{
+    private static final String[] EXTRA_MODELS = new String[] {
+        "turtle_modem_normal_off_left",
+        "turtle_modem_normal_on_left",
+        "turtle_modem_normal_off_right",
+        "turtle_modem_normal_on_right",
+
+        "turtle_modem_advanced_off_left",
+        "turtle_modem_advanced_on_left",
+        "turtle_modem_advanced_off_right",
+        "turtle_modem_advanced_on_right",
+        "turtle_crafting_table_left",
+        "turtle_crafting_table_right",
+
+        "turtle_speaker_upgrade_left",
+        "turtle_speaker_upgrade_right",
+
+        "turtle_colour",
+        "turtle_elf_overlay",
+    };
+
+    private static final String[] EXTRA_TEXTURES = new String[] {
+        // TODO: Gather these automatically from the model. I'm unable to get this working with Forge's current
+        //  model loading code.
+        "block/turtle_colour",
+        "block/turtle_elf_overlay",
+        "block/turtle_crafty_face",
+        "block/turtle_speaker_face",
+    };
+
+    private ClientRegistry() {}
+
+    /*
+    TODO: @SubscribeEvent
+    public static void registerModels( ModelRegistryEvent event )
+    {
+        ModelLoaderRegistry.registerLoader( TurtleModelLoader.INSTANCE );
+    }
+
+    TODO: @SubscribeEvent
+    public static void onTextureStitchEvent( TextureStitchEvent.Pre event )
+    {
+        ResourceManager manager = MinecraftClient.getInstance().getResourceManager();
+        for( String extra : EXTRA_TEXTURES )
+        {
+            event.getMap().registerSprite( manager, new Identifier( ComputerCraft.MOD_ID, extra ) );
+        }
+    }
+
+    TODO: @SubscribeEvent
+    public static void onModelBakeEvent( ModelBakeEvent event )
+    {
+        // Load all extra models
+        ModelLoader loader = event.getModelLoader();
+        Map<ModelIdentifier, BakedModel> registry = event.getModelRegistry();
+
+        for( String model : EXTRA_MODELS )
+        {
+            BakedModel bakedModel = bake( loader, loader.getOrLoadModel( new Identifier( ComputerCraft.MOD_ID, "item/" + model ) ) );
+
+            if( bakedModel != null )
+            {
+                registry.put(
+                    new ModelIdentifier( new Identifier( ComputerCraft.MOD_ID, model ), "inventory" ),
+                    bakedModel
+                );
+            }
+        }
+
+        // And load the custom turtle models in too.
+        registry.put(
+            new ModelIdentifier( new Identifier( ComputerCraft.MOD_ID, "turtle_normal" ), "inventory" ),
+            bake( loader, TurtleModelLoader.INSTANCE.loadModel( new Identifier( ComputerCraft.MOD_ID, "item/turtle_normal" ) ) )
+        );
+
+        registry.put(
+            new ModelIdentifier( new Identifier( ComputerCraft.MOD_ID, "turtle_advanced" ), "inventory" ),
+            bake( loader, TurtleModelLoader.INSTANCE.loadModel( new Identifier( ComputerCraft.MOD_ID, "item/turtle_advanced" ) ) )
+        );
+    }
+    */
+
+    public static void onItemColours()
+    {
+        ColorProviderRegistry.ITEM.register(
+            ( stack, layer ) -> layer == 1 ? ((ItemDisk) stack.getItem()).getColour( stack ) : 0xFFFFFF,
+            ComputerCraft.Items.disk
+        );
+
+        ColorProviderRegistry.ITEM.register( ( stack, layer ) -> {
+            switch( layer )
+            {
+                case 0:
+                default:
+                    return 0xFFFFFF;
+                case 1: // Frame colour
+                    return IColouredItem.getColourBasic( stack );
+                case 2: // Light colour
+                {
+                    int light = ItemPocketComputer.getLightState( stack );
+                    return light == -1 ? Colour.Black.getHex() : light;
+                }
+            }
+        }, ComputerCraft.Items.pocketComputerNormal, ComputerCraft.Items.pocketComputerAdvanced );
+
+        // Setup turtle colours
+        ColorProviderRegistry.ITEM.register(
+            ( stack, tintIndex ) -> tintIndex == 0 ? ((IColouredItem) stack.getItem()).getColour( stack ) : 0xFFFFFF,
+            ComputerCraft.Blocks.turtleNormal, ComputerCraft.Blocks.turtleAdvanced
+        );
+    }
+
+    private static BakedModel bake( ModelLoader loader, UnbakedModel model )
+    {
+        model.getTextureDependencies( loader::getOrLoadModel, new HashSet<>() );
+        SpriteAtlasTexture sprite = MinecraftClient.getInstance().getSpriteAtlas();
+        return model.bake( loader, sprite::getSprite, ModelRotation.X0_Y0 );
+    }
+}

src/main/java/dan200/computercraft/client/ClientTableFormatter.java

@@ -10,15 +10,17 @@ import dan200.computercraft.shared.command.text.ChatHelpers;
 import dan200.computercraft.shared.command.text.TableBuilder;
 import dan200.computercraft.shared.command.text.TableFormatter;
 import it.unimi.dsi.fastutil.ints.Int2IntOpenHashMap;
-import net.minecraft.client.Minecraft;
-import net.minecraft.client.gui.FontRenderer;
-import net.minecraft.client.gui.GuiNewChat;
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.client.font.TextRenderer;
+import net.minecraft.client.gui.hud.ChatHud;
+import net.minecraft.client.util.TextComponentUtil;
+import net.minecraft.text.TextComponent;
+import net.minecraft.text.TextFormat;
 import net.minecraft.util.math.MathHelper;
-import net.minecraft.util.text.ITextComponent;
-import net.minecraft.util.text.TextFormatting;
 import org.apache.commons.lang3.StringUtils;
 
 import javax.annotation.Nullable;
+import java.util.List;
 
 public class ClientTableFormatter implements TableFormatter
 {
@@ -26,25 +28,25 @@ public class ClientTableFormatter implements TableFormatter
 
     private static Int2IntOpenHashMap lastHeights = new Int2IntOpenHashMap();
 
-    private FontRenderer renderer()
+    private static TextRenderer renderer()
     {
-        return Minecraft.getMinecraft().fontRenderer;
+        return MinecraftClient.getInstance().textRenderer;
     }
 
     @Override
     @Nullable
-    public ITextComponent getPadding( ITextComponent component, int width )
+    public TextComponent getPadding( TextComponent component, int width )
     {
         int extraWidth = width - getWidth( component );
         if( extraWidth <= 0 ) return null;
 
-        FontRenderer renderer = renderer();
+        TextRenderer renderer = renderer();
 
         float spaceWidth = renderer.getCharWidth( ' ' );
         int spaces = MathHelper.floor( extraWidth / spaceWidth );
         int extra = extraWidth - (int) (spaces * spaceWidth);
 
-        return ChatHelpers.coloured( StringUtils.repeat( ' ', spaces ) + StringUtils.repeat( (char) 712, extra ), TextFormatting.GRAY );
+        return ChatHelpers.coloured( StringUtils.repeat( ' ', spaces ) + StringUtils.repeat( (char) 712, extra ), TextFormat.GRAY );
     }
 
     @Override
@@ -54,28 +56,34 @@ public class ClientTableFormatter implements TableFormatter
     }
 
     @Override
-    public int getWidth( ITextComponent component )
+    public int getWidth( TextComponent component )
     {
         return renderer().getStringWidth( component.getFormattedText() );
     }
 
     @Override
-    public void writeLine( int id, ITextComponent component )
+    public void writeLine( int id, TextComponent component )
     {
-        Minecraft.getMinecraft().ingameGUI.getChatGUI().printChatMessageWithOptionalDeletion( component, id );
+        MinecraftClient mc = MinecraftClient.getInstance();
+        ChatHud chat = mc.inGameHud.getChatHud();
+
+        // Trim the text if it goes over the allowed length
+        int maxWidth = MathHelper.floor( chat.getWidth() / chat.getScale() );
+        List<TextComponent> list = TextComponentUtil.wrapLines( component, maxWidth, mc.textRenderer, false, false );
+        if( !list.isEmpty() ) chat.addMessage( list.get( 0 ), id );
     }
 
     @Override
     public int display( TableBuilder table )
     {
-        GuiNewChat chat = Minecraft.getMinecraft().ingameGUI.getChatGUI();
+        ChatHud chat = MinecraftClient.getInstance().inGameHud.getChatHud();
 
         int lastHeight = lastHeights.get( table.getId() );
 
         int height = TableFormatter.super.display( table );
         lastHeights.put( table.getId(), height );
 
-        for( int i = height; i < lastHeight; i++ ) chat.deleteChatLine( i + table.getId() );
+        for( int i = height; i < lastHeight; i++ ) chat.removeMessage( i + table.getId() );
         return height;
     }
 }

src/main/java/dan200/computercraft/client/FrameInfo.java

@@ -6,44 +6,32 @@
 
 package dan200.computercraft.client;
 
-import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
-import net.minecraftforge.fml.common.gameevent.TickEvent;
-
-public class FrameInfo
+public final class FrameInfo
 {
-    private static final FrameInfo instance = new FrameInfo();
-
-    public static FrameInfo instance()
-    {
-        return instance;
-    }
-
-    private int tick;
-    private long renderFrame;
+    private static int tick;
+    private static long renderFrame;
 
     private FrameInfo()
     {
     }
 
-    public boolean getGlobalCursorBlink()
+    public static boolean getGlobalCursorBlink()
     {
         return (tick / 8) % 2 == 0;
     }
 
-    public long getRenderFrame()
+    public static long getRenderFrame()
     {
         return renderFrame;
     }
 
-    @SubscribeEvent
-    public void onTick( TickEvent.ClientTickEvent event )
+    public static void onTick()
     {
-        if( event.phase == TickEvent.Phase.START ) tick++;
+        tick++;
     }
 
-    @SubscribeEvent
-    public void onRenderTick( TickEvent.RenderTickEvent event )
+    public static void onRenderFrame()
     {
-        if( event.phase == TickEvent.Phase.START ) renderFrame++;
+        renderFrame++;
     }
 }

src/main/java/dan200/computercraft/client/gui/FixedWidthFontRenderer.java

@@ -6,23 +6,23 @@
 
 package dan200.computercraft.client.gui;
 
+import com.mojang.blaze3d.platform.GlStateManager;
 import dan200.computercraft.core.terminal.TextBuffer;
 import dan200.computercraft.shared.util.Palette;
-import net.minecraft.client.Minecraft;
-import net.minecraft.client.renderer.BufferBuilder;
-import net.minecraft.client.renderer.GlStateManager;
-import net.minecraft.client.renderer.Tessellator;
-import net.minecraft.client.renderer.texture.TextureManager;
-import net.minecraft.client.renderer.vertex.DefaultVertexFormats;
-import net.minecraft.util.ResourceLocation;
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.client.render.BufferBuilder;
+import net.minecraft.client.render.Tessellator;
+import net.minecraft.client.render.VertexFormats;
+import net.minecraft.client.texture.TextureManager;
+import net.minecraft.util.Identifier;
 import org.lwjgl.opengl.GL11;
 
 import java.util.Arrays;
 
-public class FixedWidthFontRenderer
+public final class FixedWidthFontRenderer
 {
-    private static final ResourceLocation FONT = new ResourceLocation( "computercraft", "textures/gui/term_font.png" );
-    public static final ResourceLocation BACKGROUND = new ResourceLocation( "computercraft", "textures/gui/term_background.png" );
+    private static final Identifier FONT = new Identifier( "computercraft", "textures/gui/term_font.png" );
+    public static final Identifier BACKGROUND = new Identifier( "computercraft", "textures/gui/term_background.png" );
 
     public static final int FONT_HEIGHT = 9;
     public static final int FONT_WIDTH = 6;
@@ -39,7 +39,7 @@ public class FixedWidthFontRenderer
 
     private FixedWidthFontRenderer()
     {
-        m_textureManager = Minecraft.getMinecraft().getTextureManager();
+        m_textureManager = MinecraftClient.getInstance().getTextureManager();
     }
 
     private static void greyscaleify( double[] rgb )
@@ -64,12 +64,12 @@ public class FixedWidthFontRenderer
         int xStart = 1 + column * (FONT_WIDTH + 2);
         int yStart = 1 + row * (FONT_HEIGHT + 2);
 
-        renderer.pos( x, y, 0.0 ).tex( xStart / 256.0, yStart / 256.0 ).color( r, g, b, 1.0f ).endVertex();
-        renderer.pos( x, y + FONT_HEIGHT, 0.0 ).tex( xStart / 256.0, (yStart + FONT_HEIGHT) / 256.0 ).color( r, g, b, 1.0f ).endVertex();
-        renderer.pos( x + FONT_WIDTH, y, 0.0 ).tex( (xStart + FONT_WIDTH) / 256.0, yStart / 256.0 ).color( r, g, b, 1.0f ).endVertex();
-        renderer.pos( x + FONT_WIDTH, y, 0.0 ).tex( (xStart + FONT_WIDTH) / 256.0, yStart / 256.0 ).color( r, g, b, 1.0f ).endVertex();
-        renderer.pos( x, y + FONT_HEIGHT, 0.0 ).tex( xStart / 256.0, (yStart + FONT_HEIGHT) / 256.0 ).color( r, g, b, 1.0f ).endVertex();
-        renderer.pos( x + FONT_WIDTH, y + FONT_HEIGHT, 0.0 ).tex( (xStart + FONT_WIDTH) / 256.0, (yStart + FONT_HEIGHT) / 256.0 ).color( r, g, b, 1.0f ).endVertex();
+        renderer.vertex( x, y, 0.0 ).texture( xStart / 256.0, yStart / 256.0 ).color( r, g, b, 1.0f ).next();
+        renderer.vertex( x, y + FONT_HEIGHT, 0.0 ).texture( xStart / 256.0, (yStart + FONT_HEIGHT) / 256.0 ).color( r, g, b, 1.0f ).next();
+        renderer.vertex( x + FONT_WIDTH, y, 0.0 ).texture( (xStart + FONT_WIDTH) / 256.0, yStart / 256.0 ).color( r, g, b, 1.0f ).next();
+        renderer.vertex( x + FONT_WIDTH, y, 0.0 ).texture( (xStart + FONT_WIDTH) / 256.0, yStart / 256.0 ).color( r, g, b, 1.0f ).next();
+        renderer.vertex( x, y + FONT_HEIGHT, 0.0 ).texture( xStart / 256.0, (yStart + FONT_HEIGHT) / 256.0 ).color( r, g, b, 1.0f ).next();
+        renderer.vertex( x + FONT_WIDTH, y + FONT_HEIGHT, 0.0 ).texture( (xStart + FONT_WIDTH) / 256.0, (yStart + FONT_HEIGHT) / 256.0 ).color( r, g, b, 1.0f ).next();
     }
 
     private void drawQuad( BufferBuilder renderer, double x, double y, int color, double width, Palette p, boolean greyscale )
@@ -83,25 +83,25 @@ public class FixedWidthFontRenderer
         float g = (float) colour[1];
         float b = (float) colour[2];
 
-        renderer.pos( x, y, 0.0 ).color( r, g, b, 1.0f ).endVertex();
-        renderer.pos( x, y + FONT_HEIGHT, 0.0 ).color( r, g, b, 1.0f ).endVertex();
-        renderer.pos( x + width, y, 0.0 ).color( r, g, b, 1.0f ).endVertex();
-        renderer.pos( x + width, y, 0.0 ).color( r, g, b, 1.0f ).endVertex();
-        renderer.pos( x, y + FONT_HEIGHT, 0.0 ).color( r, g, b, 1.0f ).endVertex();
-        renderer.pos( x + width, y + FONT_HEIGHT, 0.0 ).color( r, g, b, 1.0f ).endVertex();
+        renderer.vertex( x, y, 0.0 ).color( r, g, b, 1.0f ).next();
+        renderer.vertex( x, y + FONT_HEIGHT, 0.0 ).color( r, g, b, 1.0f ).next();
+        renderer.vertex( x + width, y, 0.0 ).color( r, g, b, 1.0f ).next();
+        renderer.vertex( x + width, y, 0.0 ).color( r, g, b, 1.0f ).next();
+        renderer.vertex( x, y + FONT_HEIGHT, 0.0 ).color( r, g, b, 1.0f ).next();
+        renderer.vertex( x + width, y + FONT_HEIGHT, 0.0 ).color( r, g, b, 1.0f ).next();
     }
 
     private boolean isGreyScale( int colour )
     {
-        return (colour == 0 || colour == 15 || colour == 7 || colour == 8);
+        return colour == 0 || colour == 15 || colour == 7 || colour == 8;
     }
 
     public void drawStringBackgroundPart( int x, int y, TextBuffer backgroundColour, double leftMarginSize, double rightMarginSize, boolean greyScale, Palette p )
     {
         // Draw the quads
         Tessellator tessellator = Tessellator.getInstance();
-        BufferBuilder renderer = tessellator.getBuffer();
-        renderer.begin( GL11.GL_TRIANGLES, DefaultVertexFormats.POSITION_COLOR );
+        BufferBuilder renderer = tessellator.getBufferBuilder();
+        renderer.begin( GL11.GL_TRIANGLES, VertexFormats.POSITION_COLOR );
         if( leftMarginSize > 0.0 )
         {
             int colour1 = "0123456789abcdef".indexOf( backgroundColour.charAt( 0 ) );
@@ -129,17 +129,17 @@ public class FixedWidthFontRenderer
             }
             drawQuad( renderer, x + i * FONT_WIDTH, y, colour, FONT_WIDTH, p, greyScale );
         }
-        GlStateManager.disableTexture2D();
+        GlStateManager.disableTexture();
         tessellator.draw();
-        GlStateManager.enableTexture2D();
+        GlStateManager.enableTexture();
     }
 
     public void drawStringTextPart( int x, int y, TextBuffer s, TextBuffer textColour, boolean greyScale, Palette p )
     {
         // Draw the quads
         Tessellator tessellator = Tessellator.getInstance();
-        BufferBuilder renderer = tessellator.getBuffer();
-        renderer.begin( GL11.GL_TRIANGLES, DefaultVertexFormats.POSITION_TEX_COLOR );
+        BufferBuilder renderer = tessellator.getBufferBuilder();
+        renderer.begin( GL11.GL_TRIANGLES, VertexFormats.POSITION_UV_COLOR );
         for( int i = 0; i < s.length(); i++ )
         {
             // Switch colour
@@ -195,6 +195,6 @@ public class FixedWidthFontRenderer
     public void bindFont()
     {
         m_textureManager.bindTexture( FONT );
-        GlStateManager.glTexParameteri( GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_S, GL11.GL_CLAMP );
+        GlStateManager.texParameter( GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_S, GL11.GL_CLAMP );
     }
 }

src/main/java/dan200/computercraft/client/gui/GuiComputer.java

@@ -6,54 +6,50 @@
 
 package dan200.computercraft.client.gui;
 
+import com.mojang.blaze3d.platform.GlStateManager;
 import dan200.computercraft.ComputerCraft;
 import dan200.computercraft.client.gui.widgets.WidgetTerminal;
+import dan200.computercraft.client.gui.widgets.WidgetWrapper;
 import dan200.computercraft.shared.computer.blocks.TileComputer;
 import dan200.computercraft.shared.computer.core.ClientComputer;
 import dan200.computercraft.shared.computer.core.ComputerFamily;
-import dan200.computercraft.shared.computer.core.IComputer;
 import dan200.computercraft.shared.computer.inventory.ContainerComputer;
-import net.minecraft.client.gui.inventory.GuiContainer;
-import net.minecraft.client.renderer.GlStateManager;
-import net.minecraft.inventory.Container;
-import net.minecraft.util.ResourceLocation;
-import org.lwjgl.input.Keyboard;
-import org.lwjgl.input.Mouse;
+import net.minecraft.client.gui.ContainerScreen;
+import net.minecraft.container.Container;
+import net.minecraft.entity.player.PlayerInventory;
+import net.minecraft.text.StringTextComponent;
+import net.minecraft.util.Identifier;
 
-import java.io.IOException;
-
-public class GuiComputer extends GuiContainer
+public class GuiComputer<T extends Container> extends ContainerScreen<T>
 {
-    private static final ResourceLocation BACKGROUND = new ResourceLocation( "computercraft", "textures/gui/corners.png" );
-    private static final ResourceLocation BACKGROUND_ADVANCED = new ResourceLocation( "computercraft", "textures/gui/corners_advanced.png" );
-    private static final ResourceLocation BACKGROUND_COMMAND = new ResourceLocation( "computercraft", "textures/gui/corners_command.png" );
+    private static final Identifier BACKGROUND_NORMAL = new Identifier( "computercraft", "textures/gui/corners_normal.png" );
+    private static final Identifier BACKGROUND_ADVANCED = new Identifier( "computercraft", "textures/gui/corners_advanced.png" );
+    private static final Identifier BACKGROUND_COMMAND = new Identifier( "computercraft", "textures/gui/corners_command.png" );
 
     private final ComputerFamily m_family;
     private final ClientComputer m_computer;
     private final int m_termWidth;
     private final int m_termHeight;
-    private WidgetTerminal m_terminal;
 
-    public GuiComputer( Container container, ComputerFamily family, ClientComputer computer, int termWidth, int termHeight )
+    private WidgetTerminal terminal;
+    private WidgetWrapper terminalWrapper;
+
+
+    public GuiComputer( T container, PlayerInventory player, ComputerFamily family, ClientComputer computer, int termWidth, int termHeight )
     {
-        super( container );
+        super( container, player, new StringTextComponent( "" ) );
+
         m_family = family;
         m_computer = computer;
         m_termWidth = termWidth;
         m_termHeight = termHeight;
-        m_terminal = null;
+        terminal = null;
     }
 
-    @Deprecated
-    public GuiComputer( Container container, ComputerFamily family, IComputer computer, int termWidth, int termHeight )
+    public static GuiComputer<ContainerComputer> create( int id, TileComputer computer, PlayerInventory player )
     {
-        this( container, family, (ClientComputer) computer, termWidth, termHeight );
-    }
-
-    public GuiComputer( TileComputer computer )
-    {
-        this(
-            new ContainerComputer( computer ),
+        return new GuiComputer<>(
+            new ContainerComputer( id, computer ), player,
             computer.getFamily(),
             computer.createClientComputer(),
             ComputerCraft.terminalWidth_computer,
@@ -62,133 +58,100 @@ public class GuiComputer extends GuiContainer
     }
 
     @Override
-    public void initGui()
+    protected void init()
     {
-        super.initGui();
-        Keyboard.enableRepeatEvents( true );
+        minecraft.keyboard.enableRepeatEvents( true );
 
-        m_terminal = new WidgetTerminal( 0, 0, m_termWidth, m_termHeight, () -> m_computer, 2, 2, 2, 2 );
-        m_terminal.setAllowFocusLoss( false );
-        xSize = m_terminal.getWidth() + 24;
-        ySize = m_terminal.getHeight() + 24;
+        int termPxWidth = m_termWidth * FixedWidthFontRenderer.FONT_WIDTH;
+        int termPxHeight = m_termHeight * FixedWidthFontRenderer.FONT_HEIGHT;
+
+        containerWidth = termPxWidth + 4 + 24;
+        containerHeight = termPxHeight + 4 + 24;
+
+        super.init();
+
+        terminal = new WidgetTerminal( minecraft, () -> m_computer, m_termWidth, m_termHeight, 2, 2, 2, 2 );
+        terminalWrapper = new WidgetWrapper( terminal, 2 + 12 + left, 2 + 12 + top, termPxWidth, termPxHeight );
+
+        children.add( terminalWrapper );
+        setFocused( terminalWrapper );
     }
 
     @Override
-    public void onGuiClosed()
+    public void removed()
     {
-        super.onGuiClosed();
-        Keyboard.enableRepeatEvents( false );
+        super.removed();
+        children.remove( terminal );
+        terminal = null;
+        minecraft.keyboard.enableRepeatEvents( false );
     }
 
     @Override
-    public boolean doesGuiPauseGame()
+    public void tick()
     {
-        return false;
+        super.tick();
+        terminal.update();
     }
 
     @Override
-    public void updateScreen()
-    {
-        super.updateScreen();
-        m_terminal.update();
-    }
-
-    @Override
-    protected void keyTyped( char c, int k ) throws IOException
-    {
-        if( k == 1 )
-        {
-            super.keyTyped( c, k );
-        }
-        else
-        {
-            if( m_terminal.onKeyTyped( c, k ) ) keyHandled = true;
-        }
-    }
-
-    @Override
-    protected void mouseClicked( int x, int y, int button )
-    {
-        int startX = (width - m_terminal.getWidth()) / 2;
-        int startY = (height - m_terminal.getHeight()) / 2;
-        m_terminal.mouseClicked( x - startX, y - startY, button );
-    }
-
-    @Override
-    public void handleMouseInput() throws IOException
-    {
-        super.handleMouseInput();
-
-        int x = Mouse.getEventX() * width / mc.displayWidth;
-        int y = height - Mouse.getEventY() * height / mc.displayHeight - 1;
-        int startX = (width - m_terminal.getWidth()) / 2;
-        int startY = (height - m_terminal.getHeight()) / 2;
-        m_terminal.handleMouseInput( x - startX, y - startY );
-    }
-
-    @Override
-    public void handleKeyboardInput() throws IOException
-    {
-        super.handleKeyboardInput();
-        if( m_terminal.onKeyboardInput() ) keyHandled = true;
-    }
-
-    @Override
-    protected void drawGuiContainerForegroundLayer( int par1, int par2 )
-    {
-    }
-
-    @Override
-    protected void drawGuiContainerBackgroundLayer( float var1, int var2, int var3 )
-    {
-    }
-
-    @Override
-    public void drawScreen( int mouseX, int mouseY, float f )
+    public void drawBackground( float partialTicks, int mouseX, int mouseY )
     {
         // Work out where to draw
-        int startX = (width - m_terminal.getWidth()) / 2;
-        int startY = (height - m_terminal.getHeight()) / 2;
-        int endX = startX + m_terminal.getWidth();
-        int endY = startY + m_terminal.getHeight();
-
-        // Draw background
-        drawDefaultBackground();
+        int startX = terminalWrapper.getX() - 2;
+        int startY = terminalWrapper.getY() - 2;
+        int endX = startX + terminalWrapper.getWidth() + 4;
+        int endY = startY + terminalWrapper.getHeight() + 4;
 
         // Draw terminal
-        m_terminal.draw( this.mc, startX, startY, mouseX, mouseY );
+        terminal.draw( terminalWrapper.getX(), terminalWrapper.getY() );
 
         // Draw a border around the terminal
-        GlStateManager.color( 1.0f, 1.0f, 1.0f, 1.0f );
+        GlStateManager.color4f( 1.0f, 1.0f, 1.0f, 1.0f );
         switch( m_family )
         {
             case Normal:
             default:
-            {
-                this.mc.getTextureManager().bindTexture( BACKGROUND );
+                minecraft.getTextureManager().bindTexture( BACKGROUND_NORMAL );
                 break;
-            }
             case Advanced:
-            {
-                this.mc.getTextureManager().bindTexture( BACKGROUND_ADVANCED );
+                minecraft.getTextureManager().bindTexture( BACKGROUND_ADVANCED );
                 break;
-            }
             case Command:
-            {
-                this.mc.getTextureManager().bindTexture( BACKGROUND_COMMAND );
+                minecraft.getTextureManager().bindTexture( BACKGROUND_COMMAND );
                 break;
-            }
         }
 
-        drawTexturedModalRect( startX - 12, startY - 12, 12, 28, 12, 12 );
-        drawTexturedModalRect( startX - 12, endY, 12, 40, 12, 16 );
-        drawTexturedModalRect( endX, startY - 12, 24, 28, 12, 12 );
-        drawTexturedModalRect( endX, endY, 24, 40, 12, 16 );
+        blit( startX - 12, startY - 12, 12, 28, 12, 12 );
+        blit( startX - 12, endY, 12, 40, 12, 16 );
+        blit( endX, startY - 12, 24, 28, 12, 12 );
+        blit( endX, endY, 24, 40, 12, 16 );
 
-        drawTexturedModalRect( startX, startY - 12, 0, 0, endX - startX, 12 );
-        drawTexturedModalRect( startX, endY, 0, 12, endX - startX, 16 );
+        blit( startX, startY - 12, 0, 0, endX - startX, 12 );
+        blit( startX, endY, 0, 12, endX - startX, 16 );
 
-        drawTexturedModalRect( startX - 12, startY, 0, 28, 12, endY - startY );
-        drawTexturedModalRect( endX, startY, 36, 28, 12, endY - startY );
+        blit( startX - 12, startY, 0, 28, 12, endY - startY );
+        blit( endX, startY, 36, 28, 12, endY - startY );
+    }
+
+    @Override
+    public void render( int mouseX, int mouseY, float partialTicks )
+    {
+        renderBackground( 0 );
+        super.render( mouseX, mouseY, partialTicks );
+        drawMouseoverTooltip( mouseX, mouseY );
+    }
+
+    @Override
+    public boolean mouseDragged( double x, double y, int button, double deltaX, double deltaY )
+    {
+        return (getFocused() != null && getFocused().mouseDragged( x, y, button, deltaX, deltaY ))
+            || super.mouseDragged( x, y, button, deltaX, deltaY );
+    }
+
+    @Override
+    public boolean mouseReleased( double x, double y, int button )
+    {
+        return (getFocused() != null && getFocused().mouseReleased( x, y, button ))
+            || super.mouseReleased( x, y, button );
     }
 }

src/main/java/dan200/computercraft/client/gui/GuiConfigCC.java

@@ -1,52 +0,0 @@
-/*
- * This file is part of ComputerCraft - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
- * Send enquiries to dratcliffe@gmail.com
- */
-
-package dan200.computercraft.client.gui;
-
-import dan200.computercraft.ComputerCraft;
-import dan200.computercraft.shared.Config;
-import net.minecraft.client.Minecraft;
-import net.minecraft.client.gui.GuiScreen;
-import net.minecraftforge.fml.client.IModGuiFactory;
-import net.minecraftforge.fml.client.config.GuiConfig;
-
-import java.util.Set;
-
-public class GuiConfigCC extends GuiConfig
-{
-    public GuiConfigCC( GuiScreen parentScreen )
-    {
-        super( parentScreen, Config.getConfigElements(), ComputerCraft.MOD_ID, false, false, "CC: Tweaked" );
-    }
-
-    public static class Factory
-        implements IModGuiFactory
-    {
-
-        @Override
-        public void initialize( Minecraft minecraft )
-        {
-        }
-
-        @Override
-        public boolean hasConfigGui()
-        {
-            return true;
-        }
-
-        @Override
-        public GuiScreen createConfigGui( GuiScreen parentScreen )
-        {
-            return new GuiConfigCC( parentScreen );
-        }
-
-        @Override
-        public Set<RuntimeOptionCategoryElement> runtimeGuiCategories()
-        {
-            return null;
-        }
-    }
-}

src/main/java/dan200/computercraft/client/gui/GuiDiskDrive.java

@@ -6,47 +6,44 @@
 
 package dan200.computercraft.client.gui;
 
+import com.mojang.blaze3d.platform.GlStateManager;
+import dan200.computercraft.ComputerCraft;
 import dan200.computercraft.shared.peripheral.diskdrive.ContainerDiskDrive;
-import net.minecraft.client.gui.inventory.GuiContainer;
-import net.minecraft.client.renderer.GlStateManager;
-import net.minecraft.client.resources.I18n;
-import net.minecraft.util.ResourceLocation;
+import net.minecraft.client.gui.ContainerScreen;
+import net.minecraft.client.resource.language.I18n;
+import net.minecraft.entity.player.PlayerInventory;
+import net.minecraft.util.Identifier;
 
-public class GuiDiskDrive extends GuiContainer
+public class GuiDiskDrive extends ContainerScreen<ContainerDiskDrive>
 {
-    private static final ResourceLocation BACKGROUND = new ResourceLocation( "computercraft", "textures/gui/diskdrive.png" );
+    private static final Identifier BACKGROUND = new Identifier( "computercraft", "textures/gui/disk_drive.png" );
 
-    private final ContainerDiskDrive m_container;
-
-    public GuiDiskDrive( ContainerDiskDrive container )
+    public GuiDiskDrive( ContainerDiskDrive container, PlayerInventory inventory )
     {
-        super( container );
-        m_container = container;
+        super( container, inventory, ComputerCraft.Blocks.diskDrive.getTextComponent() );
     }
 
     @Override
-    protected void drawGuiContainerForegroundLayer( int par1, int par2 )
+    protected void drawForeground( int par1, int par2 )
     {
-        String title = m_container.getDiskDrive().getDisplayName().getUnformattedText();
-        fontRenderer.drawString( title, (xSize - fontRenderer.getStringWidth( title )) / 2, 6, 0x404040 );
-        fontRenderer.drawString( I18n.format( "container.inventory" ), 8, (ySize - 96) + 2, 0x404040 );
+        String title = getTitle().getFormattedText();
+        font.draw( title, (containerWidth - font.getStringWidth( title )) / 2.0f, 6, 0x404040 );
+        font.draw( I18n.translate( "container.inventory" ), 8, (containerHeight - 96) + 2, 0x404040 );
     }
 
     @Override
-    protected void drawGuiContainerBackgroundLayer( float f, int i, int j )
+    protected void drawBackground( float partialTicks, int mouseX, int mouseY )
     {
-        GlStateManager.color( 1.0F, 1.0F, 1.0F, 1.0F );
-        this.mc.getTextureManager().bindTexture( BACKGROUND );
-        int l = (width - xSize) / 2;
-        int i1 = (height - ySize) / 2;
-        drawTexturedModalRect( l, i1, 0, 0, xSize, ySize );
+        GlStateManager.color4f( 1.0F, 1.0F, 1.0F, 1.0F );
+        minecraft.getTextureManager().bindTexture( BACKGROUND );
+        blit( left, top, 0, 0, containerWidth, containerHeight );
     }
 
     @Override
-    public void drawScreen( int mouseX, int mouseY, float partialTicks )
+    public void render( int mouseX, int mouseY, float partialTicks )
     {
-        drawDefaultBackground();
-        super.drawScreen( mouseX, mouseY, partialTicks );
-        renderHoveredToolTip( mouseX, mouseY );
+        renderBackground();
+        super.render( mouseX, mouseY, partialTicks );
+        drawMouseoverTooltip( mouseX, mouseY );
     }
 }

src/main/java/dan200/computercraft/client/gui/GuiPocketComputer.java

@@ -7,18 +7,29 @@
 package dan200.computercraft.client.gui;
 
 import dan200.computercraft.ComputerCraft;
-import dan200.computercraft.shared.media.inventory.ContainerHeldItem;
+import dan200.computercraft.shared.computer.core.ComputerFamily;
+import dan200.computercraft.shared.pocket.inventory.ContainerPocketComputer;
+import dan200.computercraft.shared.pocket.items.ItemPocketComputer;
+import net.minecraft.entity.player.PlayerInventory;
+import net.minecraft.item.Item;
+import net.minecraft.item.ItemStack;
 
-public class GuiPocketComputer extends GuiComputer
+public class GuiPocketComputer extends GuiComputer<ContainerPocketComputer>
 {
-    public GuiPocketComputer( ContainerHeldItem container )
+    public GuiPocketComputer( ContainerPocketComputer container, PlayerInventory player )
     {
         super(
-            container,
-            ComputerCraft.Items.pocketComputer.getFamily( container.getStack() ),
-            ComputerCraft.Items.pocketComputer.createClientComputer( container.getStack() ),
+            container, player,
+            getFamily( container.getStack() ),
+            ItemPocketComputer.createClientComputer( container.getStack() ),
             ComputerCraft.terminalWidth_pocketComputer,
             ComputerCraft.terminalHeight_pocketComputer
         );
     }
+
+    private static ComputerFamily getFamily( ItemStack stack )
+    {
+        Item item = stack.getItem();
+        return item instanceof ItemPocketComputer ? ((ItemPocketComputer) item).getFamily() : ComputerFamily.Normal;
+    }
 }

src/main/java/dan200/computercraft/client/gui/GuiPrinter.java

@@ -6,53 +6,46 @@
 
 package dan200.computercraft.client.gui;
 
+import com.mojang.blaze3d.platform.GlStateManager;
+import dan200.computercraft.ComputerCraft;
 import dan200.computercraft.shared.peripheral.printer.ContainerPrinter;
-import net.minecraft.client.gui.inventory.GuiContainer;
-import net.minecraft.client.renderer.GlStateManager;
-import net.minecraft.client.resources.I18n;
-import net.minecraft.util.ResourceLocation;
+import net.minecraft.client.gui.ContainerScreen;
+import net.minecraft.client.resource.language.I18n;
+import net.minecraft.entity.player.PlayerInventory;
+import net.minecraft.util.Identifier;
 
-public class GuiPrinter extends GuiContainer
+public class GuiPrinter extends ContainerScreen<ContainerPrinter>
 {
-    private static final ResourceLocation BACKGROUND = new ResourceLocation( "computercraft", "textures/gui/printer.png" );
+    private static final Identifier BACKGROUND = new Identifier( "computercraft", "textures/gui/printer.png" );
 
-    private final ContainerPrinter m_container;
-
-    public GuiPrinter( ContainerPrinter container )
+    public GuiPrinter( ContainerPrinter container, PlayerInventory player )
     {
-        super( container );
-        m_container = container;
+        super( container, player, ComputerCraft.Blocks.printer.getTextComponent() );
     }
 
     @Override
-    protected void drawGuiContainerForegroundLayer( int par1, int par2 )
+    protected void drawForeground( int mouseX, int mouseY )
     {
-        String title = m_container.getPrinter().getDisplayName().getUnformattedText();
-        fontRenderer.drawString( title, (xSize - fontRenderer.getStringWidth( title )) / 2, 6, 0x404040 );
-        fontRenderer.drawString( I18n.format( "container.inventory" ), 8, (ySize - 96) + 2, 0x404040 );
+        String title = getTitle().getFormattedText();
+        font.draw( title, (containerWidth - font.getStringWidth( title )) / 2.0f, 6, 0x404040 );
+        font.draw( I18n.translate( "container.inventory" ), 8, containerHeight - 96 + 2, 0x404040 );
     }
 
     @Override
-    protected void drawGuiContainerBackgroundLayer( float f, int i, int j )
+    protected void drawBackground( float f, int i, int j )
     {
-        GlStateManager.color( 1.0F, 1.0F, 1.0F, 1.0F );
-        this.mc.getTextureManager().bindTexture( BACKGROUND );
-        int startX = (width - xSize) / 2;
-        int startY = (height - ySize) / 2;
-        drawTexturedModalRect( startX, startY, 0, 0, xSize, ySize );
+        GlStateManager.color4f( 1.0F, 1.0F, 1.0F, 1.0F );
+        minecraft.getTextureManager().bindTexture( BACKGROUND );
+        blit( left, top, 0, 0, containerWidth, containerHeight );
 
-        boolean printing = m_container.isPrinting();
-        if( printing )
-        {
-            drawTexturedModalRect( startX + 34, startY + 21, 176, 0, 25, 45 );
-        }
+        if( container.isPrinting() ) blit( left + 34, top + 21, 176, 0, 25, 45 );
     }
 
     @Override
-    public void drawScreen( int mouseX, int mouseY, float partialTicks )
+    public void render( int mouseX, int mouseY, float partialTicks )
     {
-        drawDefaultBackground();
-        super.drawScreen( mouseX, mouseY, partialTicks );
-        renderHoveredToolTip( mouseX, mouseY );
+        renderBackground();
+        super.render( mouseX, mouseY, partialTicks );
+        drawMouseoverTooltip( mouseX, mouseY );
     }
 }

src/main/java/dan200/computercraft/client/gui/GuiPrintout.java

@@ -6,18 +6,17 @@
 
 package dan200.computercraft.client.gui;
 
+import com.mojang.blaze3d.platform.GlStateManager;
 import dan200.computercraft.core.terminal.TextBuffer;
-import dan200.computercraft.shared.media.inventory.ContainerHeldItem;
+import dan200.computercraft.shared.common.ContainerHeldItem;
 import dan200.computercraft.shared.media.items.ItemPrintout;
-import net.minecraft.client.gui.inventory.GuiContainer;
-import net.minecraft.client.renderer.GlStateManager;
-import org.lwjgl.input.Mouse;
-
-import java.io.IOException;
+import net.minecraft.client.gui.ContainerScreen;
+import net.minecraft.entity.player.PlayerInventory;
+import org.lwjgl.glfw.GLFW;
 
 import static dan200.computercraft.client.render.PrintoutRenderer.*;
 
-public class GuiPrintout extends GuiContainer
+public class GuiPrintout extends ContainerScreen<ContainerHeldItem>
 {
     private final boolean m_book;
     private final int m_pages;
@@ -25,9 +24,11 @@ public class GuiPrintout extends GuiContainer
     private final TextBuffer[] m_colours;
     private int m_page;
 
-    public GuiPrintout( ContainerHeldItem container )
+    public GuiPrintout( ContainerHeldItem container, PlayerInventory player )
     {
-        super( container );
+        super( container, player, container.getStack().getDisplayName() );
+
+        containerHeight = Y_SIZE;
 
         String[] text = ItemPrintout.getText( container.getStack() );
         m_text = new TextBuffer[text.length];
@@ -39,75 +40,70 @@ public class GuiPrintout extends GuiContainer
 
         m_page = 0;
         m_pages = Math.max( m_text.length / ItemPrintout.LINES_PER_PAGE, 1 );
-        m_book = ItemPrintout.getType( container.getStack() ) == ItemPrintout.Type.Book;
+        m_book = ((ItemPrintout) container.getStack().getItem()).getType() == ItemPrintout.Type.BOOK;
     }
 
     @Override
-    public boolean doesGuiPauseGame()
+    public boolean keyPressed( int key, int scancode, int modifiers )
     {
+        if( super.keyPressed( key, scancode, modifiers ) ) return true;
+
+        if( key == GLFW.GLFW_KEY_RIGHT )
+        {
+            if( m_page < m_pages - 1 ) m_page++;
+            return true;
+        }
+
+        if( key == GLFW.GLFW_KEY_LEFT )
+        {
+            if( m_page > 0 ) m_page--;
+            return true;
+        }
+
         return false;
     }
 
     @Override
-    protected void keyTyped( char c, int k ) throws IOException
+    public boolean mouseScrolled( double x, double y, double delta )
     {
-        super.keyTyped( c, k );
-
-        if( k == 205 )
+        if( super.mouseScrolled( x, y, delta ) ) return true;
+        if( delta < 0 )
         {
-            // Right
+            // Scroll up goes to the next page
             if( m_page < m_pages - 1 ) m_page++;
+            return true;
         }
-        else if( k == 203 )
+
+        if( delta > 0 )
         {
-            // Left
+            // Scroll down goes to the previous page
             if( m_page > 0 ) m_page--;
+            return true;
         }
+
+        return false;
     }
 
     @Override
-    public void handleMouseInput() throws IOException
+    public void drawBackground( float partialTicks, int mouseX, int mouseY )
     {
-        super.handleMouseInput();
-
-        int mouseWheelChange = Mouse.getEventDWheel();
-        if( mouseWheelChange < 0 )
-        {
-            // Up
-            if( m_page < m_pages - 1 ) m_page++;
-        }
-        else if( mouseWheelChange > 0 )
-        {
-            // Down
-            if( m_page > 0 ) m_page--;
-        }
-    }
-
-    @Override
-    protected void drawGuiContainerForegroundLayer( int par1, int par2 )
-    {
-    }
-
-    @Override
-    protected void drawGuiContainerBackgroundLayer( float var1, int var2, int var3 )
-    {
-    }
-
-    @Override
-    public void drawScreen( int mouseX, int mouseY, float f )
-    {
-        // Draw background
-        zLevel = zLevel - 1;
-        drawDefaultBackground();
-        zLevel = zLevel + 1;
-
         // Draw the printout
-        GlStateManager.color( 1.0f, 1.0f, 1.0f, 1.0f );
+        GlStateManager.color4f( 1.0f, 1.0f, 1.0f, 1.0f );
+        GlStateManager.enableDepthTest();
 
-        int startY = (height - Y_SIZE) / 2;
-        int startX = (width - X_SIZE) / 2;
+        drawBorder( left, top, blitOffset, m_page, m_pages, m_book );
+        drawText( left + X_TEXT_MARGIN, top + Y_TEXT_MARGIN, ItemPrintout.LINES_PER_PAGE * m_page, m_text, m_colours );
+    }
 
-        drawBorder( startX, startY, zLevel, m_page, m_pages, m_book );
-        drawText( startX + X_TEXT_MARGIN, startY + Y_TEXT_MARGIN, ItemPrintout.LINES_PER_PAGE * m_page, m_text, m_colours );
+    @Override
+    public void render( int mouseX, int mouseY, float partialTicks )
+    {
+        // We must take the background further back in order to not overlap with our printed pages.
+        blitOffset--;
+        renderBackground();
+        blitOffset++;
+
+        super.render( mouseX, mouseY, partialTicks );
+        drawMouseoverTooltip( mouseX, mouseY );
     }
 }

src/main/java/dan200/computercraft/client/gui/GuiTurtle.java

@@ -6,149 +6,114 @@
 
 package dan200.computercraft.client.gui;
 
+import com.mojang.blaze3d.platform.GlStateManager;
 import dan200.computercraft.ComputerCraft;
 import dan200.computercraft.client.gui.widgets.WidgetTerminal;
+import dan200.computercraft.client.gui.widgets.WidgetWrapper;
 import dan200.computercraft.shared.computer.core.ClientComputer;
 import dan200.computercraft.shared.computer.core.ComputerFamily;
 import dan200.computercraft.shared.turtle.blocks.TileTurtle;
 import dan200.computercraft.shared.turtle.inventory.ContainerTurtle;
-import net.minecraft.client.Minecraft;
-import net.minecraft.client.gui.inventory.GuiContainer;
-import net.minecraft.client.renderer.GlStateManager;
-import net.minecraft.util.ResourceLocation;
-import org.lwjgl.input.Keyboard;
-import org.lwjgl.input.Mouse;
+import net.minecraft.client.gui.ContainerScreen;
+import net.minecraft.entity.player.PlayerInventory;
+import net.minecraft.util.Identifier;
 
-import java.io.IOException;
-
-public class GuiTurtle extends GuiContainer
+public class GuiTurtle extends ContainerScreen<ContainerTurtle>
 {
-    private static final ResourceLocation BACKGROUND = new ResourceLocation( "computercraft", "textures/gui/turtle.png" );
-    private static final ResourceLocation BACKGROUND_ADVANCED = new ResourceLocation( "computercraft", "textures/gui/turtle_advanced.png" );
+    private static final Identifier BACKGROUND_NORMAL = new Identifier( "computercraft", "textures/gui/turtle_normal.png" );
+    private static final Identifier BACKGROUND_ADVANCED = new Identifier( "computercraft", "textures/gui/turtle_advanced.png" );
 
     private ContainerTurtle m_container;
 
     private final ComputerFamily m_family;
     private final ClientComputer m_computer;
-    private WidgetTerminal m_terminalGui;
 
-    public GuiTurtle( TileTurtle turtle, ContainerTurtle container )
+    private WidgetTerminal terminal;
+    private WidgetWrapper terminalWrapper;
+
+    public GuiTurtle( TileTurtle turtle, ContainerTurtle container, PlayerInventory player )
     {
-        super( container );
+        super( container, player, turtle.getDisplayName() );
 
         m_container = container;
         m_family = turtle.getFamily();
         m_computer = turtle.getClientComputer();
 
-        xSize = 254;
-        ySize = 217;
+        containerWidth = 254;
+        containerHeight = 217;
     }
 
     @Override
-    public void initGui()
+    protected void init()
     {
-        super.initGui();
-        Keyboard.enableRepeatEvents( true );
-        m_terminalGui = new WidgetTerminal(
-            (width - xSize) / 2 + 8,
-            (height - ySize) / 2 + 8,
+        super.init();
+        minecraft.keyboard.enableRepeatEvents( true );
+
+        int termPxWidth = ComputerCraft.terminalWidth_turtle * FixedWidthFontRenderer.FONT_WIDTH;
+        int termPxHeight = ComputerCraft.terminalHeight_turtle * FixedWidthFontRenderer.FONT_HEIGHT;
+
+        terminal = new WidgetTerminal(
+            minecraft, () -> m_computer,
             ComputerCraft.terminalWidth_turtle,
             ComputerCraft.terminalHeight_turtle,
-            () -> m_computer,
             2, 2, 2, 2
         );
-        m_terminalGui.setAllowFocusLoss( false );
+        terminalWrapper = new WidgetWrapper( terminal, 2 + 8 + left, 2 + 8 + top, termPxWidth, termPxHeight );
+
+        children.add( terminalWrapper );
+        setFocused( terminalWrapper );
     }
 
     @Override
-    public void onGuiClosed()
+    public void removed()
     {
-        super.onGuiClosed();
-        Keyboard.enableRepeatEvents( false );
+        super.removed();
+        children.remove( terminal );
+        terminal = null;
+        minecraft.keyboard.enableRepeatEvents( false );
     }
 
     @Override
-    public void updateScreen()
+    public void tick()
     {
-        super.updateScreen();
-        m_terminalGui.update();
+        super.tick();
+        terminal.update();
     }
 
-    @Override
-    protected void keyTyped( char c, int k ) throws IOException
+    private void drawSelectionSlot( boolean advanced )
     {
-        if( k == 1 )
-        {
-            super.keyTyped( c, k );
-        }
-        else
-        {
-            if( m_terminalGui.onKeyTyped( c, k ) ) keyHandled = true;
-        }
-    }
-
-    @Override
-    protected void mouseClicked( int x, int y, int button ) throws IOException
-    {
-        super.mouseClicked( x, y, button );
-        m_terminalGui.mouseClicked( x, y, button );
-    }
-
-    @Override
-    public void handleMouseInput() throws IOException
-    {
-        super.handleMouseInput();
-        int x = Mouse.getEventX() * this.width / mc.displayWidth;
-        int y = this.height - Mouse.getEventY() * this.height / mc.displayHeight - 1;
-        m_terminalGui.handleMouseInput( x, y );
-    }
-
-    @Override
-    public void handleKeyboardInput() throws IOException
-    {
-        super.handleKeyboardInput();
-        if( m_terminalGui.onKeyboardInput() ) keyHandled = true;
-    }
-
-    protected void drawSelectionSlot( boolean advanced )
-    {
-        int x = (width - xSize) / 2;
-        int y = (height - ySize) / 2;
-
         // Draw selection slot
         int slot = m_container.getSelectedSlot();
         if( slot >= 0 )
         {
-            GlStateManager.color( 1.0F, 1.0F, 1.0F, 1.0F );
-            int slotX = (slot % 4);
-            int slotY = (slot / 4);
-            this.mc.getTextureManager().bindTexture( advanced ? BACKGROUND_ADVANCED : BACKGROUND );
-            drawTexturedModalRect( x + m_container.m_turtleInvStartX - 2 + slotX * 18, y + m_container.m_playerInvStartY - 2 + slotY * 18, 0, 217, 24, 24 );
+            GlStateManager.color4f( 1.0F, 1.0F, 1.0F, 1.0F );
+            int slotX = slot % 4;
+            int slotY = slot / 4;
+            minecraft.getTextureManager().bindTexture( advanced ? BACKGROUND_ADVANCED : BACKGROUND_NORMAL );
+            blit( left + m_container.m_turtleInvStartX - 2 + slotX * 18, top + m_container.m_playerInvStartY - 2 + slotY * 18, 0, 217, 24, 24 );
         }
     }
 
     @Override
-    protected void drawGuiContainerBackgroundLayer( float f, int mouseX, int mouseY )
+    protected void drawBackground( float partialTicks, int mouseX, int mouseY )
     {
         // Draw term
-        boolean advanced = (m_family == ComputerFamily.Advanced);
-        m_terminalGui.draw( Minecraft.getMinecraft(), 0, 0, mouseX, mouseY );
+        boolean advanced = m_family == ComputerFamily.Advanced;
+        terminal.draw( terminalWrapper.getX(), terminalWrapper.getY() );
 
         // Draw border/inventory
-        GlStateManager.color( 1.0F, 1.0F, 1.0F, 1.0F );
-        this.mc.getTextureManager().bindTexture( advanced ? BACKGROUND_ADVANCED : BACKGROUND );
-        int x = (width - xSize) / 2;
-        int y = (height - ySize) / 2;
-        drawTexturedModalRect( x, y, 0, 0, xSize, ySize );
+        GlStateManager.color4f( 1.0F, 1.0F, 1.0F, 1.0F );
+        minecraft.getTextureManager().bindTexture( advanced ? BACKGROUND_ADVANCED : BACKGROUND_NORMAL );
+        blit( left, top, 0, 0, containerWidth, containerHeight );
 
         drawSelectionSlot( advanced );
     }
 
     @Override
-    public void drawScreen( int mouseX, int mouseY, float partialTicks )
+    public void render( int mouseX, int mouseY, float partialTicks )
     {
-        drawDefaultBackground();
-        super.drawScreen( mouseX, mouseY, partialTicks );
-        renderHoveredToolTip( mouseX, mouseY );
+        renderBackground();
+        super.render( mouseX, mouseY, partialTicks );
+        drawMouseoverTooltip( mouseX, mouseY );
     }
 }

src/main/java/dan200/computercraft/client/gui/widgets/Widget.java

@@ -1,84 +0,0 @@
-/*
- * This file is part of ComputerCraft - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
- * Send enquiries to dratcliffe@gmail.com
- */
-
-package dan200.computercraft.client.gui.widgets;
-
-import net.minecraft.client.Minecraft;
-import net.minecraft.client.gui.Gui;
-
-public abstract class Widget extends Gui
-{
-    private int m_xPosition;
-    private int m_yPosition;
-    private int m_width;
-    private int m_height;
-
-    protected Widget( int x, int y, int width, int height )
-    {
-        m_xPosition = x;
-        m_yPosition = y;
-        m_width = width;
-        m_height = height;
-    }
-
-    public int getXPosition()
-    {
-        return m_xPosition;
-    }
-
-    public int getYPosition()
-    {
-        return m_yPosition;
-    }
-
-    public int getWidth()
-    {
-        return m_width;
-    }
-
-    public int getHeight()
-    {
-        return m_height;
-    }
-
-    public void update()
-    {
-    }
-
-    public void draw( Minecraft mc, int xOrigin, int yOrigin, int mouseX, int mouseY )
-    {
-    }
-
-    public void handleMouseInput( int mouseX, int mouseY )
-    {
-    }
-
-    public boolean onKeyboardInput()
-    {
-        return false;
-    }
-
-    @Deprecated
-    public void handleKeyboardInput()
-    {
-        onKeyboardInput();
-    }
-
-    public void mouseClicked( int mouseX, int mouseY, int mouseButton )
-    {
-    }
-
-    public boolean onKeyTyped( char c, int k )
-    {
-        return false;
-    }
-
-    @Deprecated
-    public void keyTyped( char c, int k )
-    {
-        onKeyTyped( c, k );
-    }
-}

src/main/java/dan200/computercraft/client/gui/widgets/WidgetTerminal.java

@@ -6,415 +6,367 @@
 
 package dan200.computercraft.client.gui.widgets;
 
+import com.mojang.blaze3d.platform.GlStateManager;
 import dan200.computercraft.client.FrameInfo;
 import dan200.computercraft.client.gui.FixedWidthFontRenderer;
 import dan200.computercraft.core.terminal.Terminal;
 import dan200.computercraft.core.terminal.TextBuffer;
+import dan200.computercraft.shared.computer.core.ClientComputer;
 import dan200.computercraft.shared.computer.core.IComputer;
-import dan200.computercraft.shared.computer.core.IComputerContainer;
 import dan200.computercraft.shared.util.Colour;
 import dan200.computercraft.shared.util.Palette;
-import net.minecraft.client.Minecraft;
-import net.minecraft.client.gui.GuiScreen;
-import net.minecraft.client.renderer.GlStateManager;
-import net.minecraft.util.ChatAllowedCharacters;
-import org.lwjgl.input.Keyboard;
-import org.lwjgl.input.Mouse;
+import net.minecraft.SharedConstants;
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.client.gui.Element;
+import net.minecraft.client.render.BufferBuilder;
+import net.minecraft.client.render.Tessellator;
+import net.minecraft.client.render.VertexFormats;
+import org.lwjgl.glfw.GLFW;
+import org.lwjgl.opengl.GL11;
 
-import java.util.ArrayList;
+import java.util.BitSet;
+import java.util.function.Supplier;
 
 import static dan200.computercraft.client.gui.FixedWidthFontRenderer.BACKGROUND;
 
-public class WidgetTerminal extends Widget
+public class WidgetTerminal implements Element
 {
     private static final float TERMINATE_TIME = 0.5f;
 
-    private final IComputerContainer m_computer;
+    private final MinecraftClient minecraft;
 
-    private float m_terminateTimer;
-    private float m_rebootTimer;
-    private float m_shutdownTimer;
+    private final Supplier<ClientComputer> computer;
+    private final int termWidth;
+    private final int termHeight;
 
-    private int m_lastClickButton;
-    private int m_lastClickX;
-    private int m_lastClickY;
+    private boolean focused;
 
-    private boolean m_focus;
-    private boolean m_allowFocusLoss;
+    private float terminateTimer = -1;
+    private float rebootTimer = -1;
+    private float shutdownTimer = -1;
 
-    private int m_leftMargin;
-    private int m_rightMargin;
-    private int m_topMargin;
-    private int m_bottomMargin;
+    private int lastMouseButton = -1;
+    private int lastMouseX = -1;
+    private int lastMouseY = -1;
 
-    private ArrayList<Integer> m_keysDown;
+    private final int leftMargin;
+    private final int rightMargin;
+    private final int topMargin;
+    private final int bottomMargin;
 
-    public WidgetTerminal( int x, int y, int termWidth, int termHeight, IComputerContainer computer, int leftMargin, int rightMargin, int topMargin, int bottomMargin )
+    private final BitSet keysDown = new BitSet( 256 );
+
+    public WidgetTerminal( MinecraftClient minecraft, Supplier<ClientComputer> computer, int termWidth, int termHeight, int leftMargin, int rightMargin, int topMargin, int bottomMargin )
     {
-        super(
-            x, y,
-            leftMargin + rightMargin + termWidth * FixedWidthFontRenderer.FONT_WIDTH,
-            topMargin + bottomMargin + termHeight * FixedWidthFontRenderer.FONT_HEIGHT
-        );
-
-        m_computer = computer;
-        m_terminateTimer = 0.0f;
-        m_rebootTimer = 0.0f;
-        m_shutdownTimer = 0.0f;
-
-        m_lastClickButton = -1;
-        m_lastClickX = -1;
-        m_lastClickY = -1;
-
-        m_focus = false;
-        m_allowFocusLoss = true;
-
-        m_leftMargin = leftMargin;
-        m_rightMargin = rightMargin;
-        m_topMargin = topMargin;
-        m_bottomMargin = bottomMargin;
-
-        m_keysDown = new ArrayList<>();
-    }
-
-    public void setAllowFocusLoss( boolean allowFocusLoss )
-    {
-        m_allowFocusLoss = allowFocusLoss;
-        m_focus = m_focus || !allowFocusLoss;
+        this.minecraft = minecraft;
+        this.computer = computer;
+        this.termWidth = termWidth;
+        this.termHeight = termHeight;
+        this.leftMargin = leftMargin;
+        this.rightMargin = rightMargin;
+        this.topMargin = topMargin;
+        this.bottomMargin = bottomMargin;
     }
 
     @Override
-    public boolean onKeyTyped( char ch, int key )
+    public boolean charTyped( char ch, int modifiers )
     {
-        if( m_focus )
+        if( ch >= 32 && ch <= 126 || ch >= 160 && ch <= 255 ) // printable chars in byte range
         {
-            // Ctrl+V for paste
-            if( ch == 22 )
+            // Queue the "char" event
+            queueEvent( "char", Character.toString( ch ) );
+        }
+
+        return true;
+    }
+
+    @Override
+    public boolean keyPressed( int key, int scancode, int modifiers )
+    {
+        if( key == GLFW.GLFW_KEY_ESCAPE ) return false;
+        if( (modifiers & GLFW.GLFW_MOD_CONTROL) != 0 )
+        {
+            switch( key )
             {
-                String clipboard = GuiScreen.getClipboardString();
-                if( clipboard != null )
-                {
-                    // Clip to the first occurance of \r or \n
-                    int newLineIndex1 = clipboard.indexOf( "\r" );
-                    int newLineIndex2 = clipboard.indexOf( "\n" );
-                    if( newLineIndex1 >= 0 && newLineIndex2 >= 0 )
-                    {
-                        clipboard = clipboard.substring( 0, Math.min( newLineIndex1, newLineIndex2 ) );
-                    }
-                    else if( newLineIndex1 >= 0 )
-                    {
-                        clipboard = clipboard.substring( 0, newLineIndex1 );
-                    }
-                    else if( newLineIndex2 >= 0 )
-                    {
-                        clipboard = clipboard.substring( 0, newLineIndex2 );
-                    }
+                case GLFW.GLFW_KEY_T:
+                    if( terminateTimer < 0 ) terminateTimer = 0;
+                    return true;
+                case GLFW.GLFW_KEY_S:
+                    if( shutdownTimer < 0 ) shutdownTimer = 0;
+                    return true;
+                case GLFW.GLFW_KEY_R:
+                    if( rebootTimer < 0 ) rebootTimer = 0;
+                    return true;
 
-                    // Filter the string
-                    clipboard = ChatAllowedCharacters.filterAllowedCharacters( clipboard );
-
-                    if( !clipboard.isEmpty() )
+                case GLFW.GLFW_KEY_V:
+                    // Ctrl+V for paste
+                    String clipboard = minecraft.keyboard.getClipboard();
+                    if( clipboard != null )
                     {
-                        // Clip to 512 characters
-                        if( clipboard.length() > 512 )
+                        // Clip to the first occurrence of \r or \n
+                        int newLineIndex1 = clipboard.indexOf( "\r" );
+                        int newLineIndex2 = clipboard.indexOf( "\n" );
+                        if( newLineIndex1 >= 0 && newLineIndex2 >= 0 )
                         {
-                            clipboard = clipboard.substring( 0, 512 );
+                            clipboard = clipboard.substring( 0, Math.min( newLineIndex1, newLineIndex2 ) );
+                        }
+                        else if( newLineIndex1 >= 0 )
+                        {
+                            clipboard = clipboard.substring( 0, newLineIndex1 );
+                        }
+                        else if( newLineIndex2 >= 0 )
+                        {
+                            clipboard = clipboard.substring( 0, newLineIndex2 );
                         }
 
-                        // Queue the "paste" event
-                        queueEvent( "paste", new Object[] {
-                            clipboard
-                        } );
-                    }
-                }
-                return true;
-            }
+                        // Filter the string
+                        clipboard = SharedConstants.stripInvalidChars( clipboard );
+                        if( !clipboard.isEmpty() )
+                        {
+                            // Clip to 512 characters and queue the event
+                            if( clipboard.length() > 512 ) clipboard = clipboard.substring( 0, 512 );
+                            queueEvent( "paste", clipboard );
+                        }
 
-            // Regular keys normally
-            if( m_terminateTimer <= 0.0f && m_rebootTimer <= 0.0f && m_shutdownTimer <= 0.0f )
+                        return true;
+                    }
+            }
+        }
+
+        if( key >= 0 && terminateTimer < 0 && rebootTimer < 0 && shutdownTimer < 0 )
+        {
+            // Queue the "key" event and add to the down set
+            boolean repeat = keysDown.get( key );
+            keysDown.set( key );
+            IComputer computer = this.computer.get();
+            if( computer != null ) computer.keyDown( key, repeat );
+        }
+
+        return true;
+    }
+
+    @Override
+    public boolean keyReleased( int key, int scancode, int modifiers )
+    {
+        // Queue the "key_up" event and remove from the down set
+        if( key >= 0 && keysDown.get( key ) )
+        {
+            keysDown.set( key, false );
+            IComputer computer = this.computer.get();
+            if( computer != null ) computer.keyUp( key );
+        }
+
+        switch( key )
+        {
+            case GLFW.GLFW_KEY_T:
+                terminateTimer = -1;
+                break;
+            case GLFW.GLFW_KEY_R:
+                rebootTimer = -1;
+                break;
+            case GLFW.GLFW_KEY_S:
+                shutdownTimer = -1;
+                break;
+            case GLFW.GLFW_KEY_LEFT_CONTROL:
+            case GLFW.GLFW_KEY_RIGHT_CONTROL:
+                terminateTimer = rebootTimer = shutdownTimer = -1;
+                break;
+        }
+
+        return true;
+    }
+
+    @Override
+    public boolean mouseClicked( double mouseX, double mouseY, int button )
+    {
+        ClientComputer computer = this.computer.get();
+        if( computer == null || !computer.isColour() || button < 0 || button > 2 ) return false;
+
+        Terminal term = computer.getTerminal();
+        if( term != null )
+        {
+            int charX = (int) (mouseX / FixedWidthFontRenderer.FONT_WIDTH);
+            int charY = (int) (mouseY / FixedWidthFontRenderer.FONT_HEIGHT);
+            charX = Math.min( Math.max( charX, 0 ), term.getWidth() - 1 );
+            charY = Math.min( Math.max( charY, 0 ), term.getHeight() - 1 );
+
+            computer.mouseClick( button + 1, charX + 1, charY + 1 );
+
+            lastMouseButton = button;
+            lastMouseX = charX;
+            lastMouseY = charY;
+        }
+
+        return true;
+    }
+
+    @Override
+    public boolean mouseReleased( double mouseX, double mouseY, int button )
+    {
+        ClientComputer computer = this.computer.get();
+        if( computer == null || !computer.isColour() || button < 0 || button > 2 ) return false;
+
+        Terminal term = computer.getTerminal();
+        if( term != null )
+        {
+            int charX = (int) (mouseX / FixedWidthFontRenderer.FONT_WIDTH);
+            int charY = (int) (mouseY / FixedWidthFontRenderer.FONT_HEIGHT);
+            charX = Math.min( Math.max( charX, 0 ), term.getWidth() - 1 );
+            charY = Math.min( Math.max( charY, 0 ), term.getHeight() - 1 );
+
+            if( lastMouseButton == button )
             {
-                boolean repeat = Keyboard.isRepeatEvent();
-                boolean handled = false;
-                if( key > 0 )
-                {
-                    if( !repeat )
-                    {
-                        m_keysDown.add( key );
-                    }
-
-                    // Queue the "key" event
-                    queueEvent( "key", new Object[] {
-                        key, repeat
-                    } );
-                    handled = true;
-                }
-
-                if( (ch >= 32 && ch <= 126) || (ch >= 160 && ch <= 255) ) // printable chars in byte range
-                {
-                    // Queue the "char" event
-                    queueEvent( "char", new Object[] {
-                        Character.toString( ch )
-                    } );
-                    handled = true;
-                }
-
-                return handled;
+                computer.mouseUp( lastMouseButton + 1, charX + 1, charY + 1 );
+                lastMouseButton = -1;
             }
+
+            lastMouseX = charX;
+            lastMouseY = charY;
         }
 
         return false;
     }
 
     @Override
-    public void mouseClicked( int mouseX, int mouseY, int button )
+    public boolean mouseDragged( double mouseX, double mouseY, int button, double v2, double v3 )
     {
-        if( mouseX >= getXPosition() && mouseX < getXPosition() + getWidth() &&
-            mouseY >= getYPosition() && mouseY < getYPosition() + getHeight() )
+        ClientComputer computer = this.computer.get();
+        if( computer == null || !computer.isColour() || button < 0 || button > 2 ) return false;
+
+        Terminal term = computer.getTerminal();
+        if( term != null )
         {
-            if( !m_focus && button == 0 )
-            {
-                m_focus = true;
-            }
+            int charX = (int) (mouseX / FixedWidthFontRenderer.FONT_WIDTH);
+            int charY = (int) (mouseY / FixedWidthFontRenderer.FONT_HEIGHT);
+            charX = Math.min( Math.max( charX, 0 ), term.getWidth() - 1 );
+            charY = Math.min( Math.max( charY, 0 ), term.getHeight() - 1 );
 
-            if( m_focus )
-            {
-                IComputer computer = m_computer.getComputer();
-                if( computer != null && computer.isColour() && button >= 0 && button <= 2 )
-                {
-                    Terminal term = computer.getTerminal();
-                    if( term != null )
-                    {
-                        int charX = (mouseX - (getXPosition() + m_leftMargin)) / FixedWidthFontRenderer.FONT_WIDTH;
-                        int charY = (mouseY - (getYPosition() + m_topMargin)) / FixedWidthFontRenderer.FONT_HEIGHT;
-                        charX = Math.min( Math.max( charX, 0 ), term.getWidth() - 1 );
-                        charY = Math.min( Math.max( charY, 0 ), term.getHeight() - 1 );
+            computer.mouseDrag( button + 1, charX + 1, charY + 1 );
 
-                        computer.queueEvent( "mouse_click", new Object[] {
-                            button + 1, charX + 1, charY + 1
-                        } );
-
-                        m_lastClickButton = button;
-                        m_lastClickX = charX;
-                        m_lastClickY = charY;
-                    }
-                }
-            }
-        }
-        else
-        {
-            if( m_focus && button == 0 && m_allowFocusLoss )
-            {
-                m_focus = false;
-            }
+            lastMouseX = charX;
+            lastMouseY = charY;
+            lastMouseButton = button;
         }
+
+        return false;
     }
 
     @Override
-    public boolean onKeyboardInput()
+    public boolean mouseScrolled( double mouseX, double mouseY, double delta )
     {
-        boolean handled = false;
-        for( int i = m_keysDown.size() - 1; i >= 0; --i )
+        ClientComputer computer = this.computer.get();
+        if( computer == null || !computer.isColour() || delta == 0 ) return false;
+
+        Terminal term = computer.getTerminal();
+        if( term != null )
         {
-            int key = m_keysDown.get( i );
-            if( !Keyboard.isKeyDown( key ) )
-            {
-                m_keysDown.remove( i );
-                if( m_focus )
-                {
-                    // Queue the "key_up" event
-                    queueEvent( "key_up", new Object[] {
-                        key
-                    } );
-                    handled = true;
-                }
-            }
+            int charX = (int) (mouseX / FixedWidthFontRenderer.FONT_WIDTH);
+            int charY = (int) (mouseY / FixedWidthFontRenderer.FONT_HEIGHT);
+            charX = Math.min( Math.max( charX, 0 ), term.getWidth() - 1 );
+            charY = Math.min( Math.max( charY, 0 ), term.getHeight() - 1 );
+
+            computer.mouseScroll( delta < 0 ? 1 : -1, charX + 1, charY + 1 );
+
+            lastMouseX = charX;
+            lastMouseY = charY;
         }
 
-        return handled;
+        return true;
     }
 
-    @Override
-    public void handleMouseInput( int mouseX, int mouseY )
-    {
-        IComputer computer = m_computer.getComputer();
-        if( mouseX >= getXPosition() && mouseX < getXPosition() + getWidth() &&
-            mouseY >= getYPosition() && mouseY < getYPosition() + getHeight() &&
-            computer != null && computer.isColour() )
-        {
-            Terminal term = computer.getTerminal();
-            if( term != null )
-            {
-                int charX = (mouseX - (getXPosition() + m_leftMargin)) / FixedWidthFontRenderer.FONT_WIDTH;
-                int charY = (mouseY - (getYPosition() + m_topMargin)) / FixedWidthFontRenderer.FONT_HEIGHT;
-                charX = Math.min( Math.max( charX, 0 ), term.getWidth() - 1 );
-                charY = Math.min( Math.max( charY, 0 ), term.getHeight() - 1 );
-
-                if( m_lastClickButton >= 0 && !Mouse.isButtonDown( m_lastClickButton ) )
-                {
-                    if( m_focus )
-                    {
-                        computer.queueEvent( "mouse_up", new Object[] {
-                            m_lastClickButton + 1, charX + 1, charY + 1
-                        } );
-                    }
-                    m_lastClickButton = -1;
-                }
-
-                int wheelChange = Mouse.getEventDWheel();
-                if( wheelChange == 0 && m_lastClickButton == -1 )
-                {
-                    return;
-                }
-
-                if( m_focus )
-                {
-                    if( wheelChange < 0 )
-                    {
-                        computer.queueEvent( "mouse_scroll", new Object[] {
-                            1, charX + 1, charY + 1
-                        } );
-                    }
-                    else if( wheelChange > 0 )
-                    {
-                        computer.queueEvent( "mouse_scroll", new Object[] {
-                            -1, charX + 1, charY + 1
-                        } );
-                    }
-
-                    if( m_lastClickButton >= 0 && (charX != m_lastClickX || charY != m_lastClickY) )
-                    {
-                        computer.queueEvent( "mouse_drag", new Object[] {
-                            m_lastClickButton + 1, charX + 1, charY + 1
-                        } );
-                        m_lastClickX = charX;
-                        m_lastClickY = charY;
-                    }
-                }
-            }
-        }
-    }
-
-    @Override
     public void update()
     {
-        // Handle special keys
-        if( m_focus && (Keyboard.isKeyDown( 29 ) || Keyboard.isKeyDown( 157 )) )
+        if( terminateTimer >= 0 && terminateTimer < TERMINATE_TIME && (terminateTimer += 0.05f) > TERMINATE_TIME )
         {
-            // Ctrl+T for terminate
-            if( Keyboard.isKeyDown( 20 ) )
-            {
-                if( m_terminateTimer < TERMINATE_TIME )
-                {
-                    m_terminateTimer = m_terminateTimer + 0.05f;
-                    if( m_terminateTimer >= TERMINATE_TIME )
-                    {
-                        queueEvent( "terminate" );
-                    }
-                }
-            }
-            else
-            {
-                m_terminateTimer = 0.0f;
-            }
-
-            // Ctrl+R for reboot
-            if( Keyboard.isKeyDown( 19 ) )
-            {
-                if( m_rebootTimer < TERMINATE_TIME )
-                {
-                    m_rebootTimer = m_rebootTimer + 0.05f;
-                    if( m_rebootTimer >= TERMINATE_TIME )
-                    {
-                        IComputer computer = m_computer.getComputer();
-                        if( computer != null )
-                        {
-                            computer.reboot();
-                        }
-                    }
-                }
-            }
-            else
-            {
-                m_rebootTimer = 0.0f;
-            }
-
-            // Ctrl+S for shutdown
-            if( Keyboard.isKeyDown( 31 ) )
-            {
-                if( m_shutdownTimer < TERMINATE_TIME )
-                {
-                    m_shutdownTimer = m_shutdownTimer + 0.05f;
-                    if( m_shutdownTimer >= TERMINATE_TIME )
-                    {
-                        IComputer computer = m_computer.getComputer();
-                        if( computer != null )
-                        {
-                            computer.shutdown();
-                        }
-                    }
-                }
-            }
-            else
-            {
-                m_shutdownTimer = 0.0f;
-            }
+            queueEvent( "terminate" );
         }
-        else
+
+        if( shutdownTimer >= 0 && shutdownTimer < TERMINATE_TIME && (shutdownTimer += 0.05f) > TERMINATE_TIME )
         {
-            m_terminateTimer = 0.0f;
-            m_rebootTimer = 0.0f;
-            m_shutdownTimer = 0.0f;
+            ClientComputer computer = this.computer.get();
+            if( computer != null ) computer.shutdown();
+        }
+
+        if( rebootTimer >= 0 && rebootTimer < TERMINATE_TIME && (rebootTimer += 0.05f) > TERMINATE_TIME )
+        {
+            ClientComputer computer = this.computer.get();
+            if( computer != null ) computer.reboot();
         }
     }
 
     @Override
-    public void draw( Minecraft mc, int xOrigin, int yOrigin, int mouseX, int mouseY )
+    public boolean changeFocus( boolean reverse )
     {
-        int startX = xOrigin + getXPosition();
-        int startY = yOrigin + getYPosition();
+        if( focused )
+        {
+            // When blurring, we should make all keys go up
+            for( int key = 0; key < keysDown.size(); key++ )
+            {
+                if( keysDown.get( key ) ) queueEvent( "key_up", key );
+            }
+            keysDown.clear();
 
-        synchronized( m_computer )
+            // When blurring, we should make the last mouse button go up
+            if( lastMouseButton > 0 )
+            {
+                IComputer computer = this.computer.get();
+                if( computer != null ) computer.mouseUp( lastMouseButton + 1, lastMouseX + 1, lastMouseY + 1 );
+                lastMouseButton = -1;
+            }
+
+            shutdownTimer = terminateTimer = rebootTimer = -1;
+        }
+
+        focused = !focused;
+        return true;
+    }
+
+    public void draw( int originX, int originY )
+    {
+        synchronized( computer )
         {
             // Draw the screen contents
-            IComputer computer = m_computer.getComputer();
-            Terminal terminal = (computer != null) ? computer.getTerminal() : null;
+            ClientComputer computer = this.computer.get();
+            Terminal terminal = computer != null ? computer.getTerminal() : null;
             if( terminal != null )
             {
                 // Draw the terminal
                 boolean greyscale = !computer.isColour();
-
                 Palette palette = terminal.getPalette();
 
                 // Get the data from the terminal first
                 // Unfortunately we have to keep the lock for the whole of drawing, so the text doesn't change under us.
                 FixedWidthFontRenderer fontRenderer = FixedWidthFontRenderer.instance();
-                boolean tblink = m_focus && terminal.getCursorBlink() && FrameInfo.instance().getGlobalCursorBlink();
+                boolean tblink = terminal.getCursorBlink() && FrameInfo.getGlobalCursorBlink();
                 int tw = terminal.getWidth();
                 int th = terminal.getHeight();
                 int tx = terminal.getCursorX();
                 int ty = terminal.getCursorY();
 
-                int x = startX + m_leftMargin;
-                int y = startY + m_topMargin;
-
                 // Draw margins
                 TextBuffer emptyLine = new TextBuffer( ' ', tw );
-                if( m_topMargin > 0 )
+                if( topMargin > 0 )
                 {
-                    fontRenderer.drawString( emptyLine, x, startY, terminal.getTextColourLine( 0 ), terminal.getBackgroundColourLine( 0 ), m_leftMargin, m_rightMargin, greyscale, palette );
+                    fontRenderer.drawString( emptyLine, originX, originY - topMargin,
+                        terminal.getTextColourLine( 0 ), terminal.getBackgroundColourLine( 0 ),
+                        leftMargin, rightMargin, greyscale, palette );
                 }
-                if( m_bottomMargin > 0 )
+
+                if( bottomMargin > 0 )
                 {
-                    fontRenderer.drawString( emptyLine, x, startY + 2 * m_bottomMargin + (th - 1) * FixedWidthFontRenderer.FONT_HEIGHT, terminal.getTextColourLine( th - 1 ), terminal.getBackgroundColourLine( th - 1 ), m_leftMargin, m_rightMargin, greyscale, palette );
+                    fontRenderer.drawString( emptyLine, originX, originY + bottomMargin + (th - 1) * FixedWidthFontRenderer.FONT_HEIGHT,
+                        terminal.getTextColourLine( th - 1 ), terminal.getBackgroundColourLine( th - 1 ),
+                        leftMargin, rightMargin, greyscale, palette );
                 }
 
                 // Draw lines
+                int y = originY;
                 for( int line = 0; line < th; line++ )
                 {
                     TextBuffer text = terminal.getLine( line );
                     TextBuffer colour = terminal.getTextColourLine( line );
                     TextBuffer backgroundColour = terminal.getBackgroundColourLine( line );
-                    fontRenderer.drawString( text, x, y, colour, backgroundColour, m_leftMargin, m_rightMargin, greyscale, palette );
+                    fontRenderer.drawString( text, originX, y, colour, backgroundColour, leftMargin, rightMargin, greyscale, palette );
                     y += FixedWidthFontRenderer.FONT_HEIGHT;
                 }
 
@@ -425,8 +377,8 @@ public class WidgetTerminal extends Widget
 
                     fontRenderer.drawString(
                         cursor,
-                        x + FixedWidthFontRenderer.FONT_WIDTH * tx,
-                        startY + m_topMargin + FixedWidthFontRenderer.FONT_HEIGHT * ty,
+                        originX + FixedWidthFontRenderer.FONT_WIDTH * tx,
+                        originY + FixedWidthFontRenderer.FONT_HEIGHT * ty,
                         cursorColour, null,
                         0, 0,
                         greyscale,
@@ -437,16 +389,29 @@ public class WidgetTerminal extends Widget
             else
             {
                 // Draw a black background
-                mc.getTextureManager().bindTexture( BACKGROUND );
                 Colour black = Colour.Black;
-                GlStateManager.color( black.getR(), black.getG(), black.getB(), 1.0f );
+                GlStateManager.color4f( black.getR(), black.getG(), black.getB(), 1.0f );
                 try
                 {
-                    drawTexturedModalRect( startX, startY, 0, 0, getWidth(), getHeight() );
+                    int x = originX - leftMargin;
+                    int y = originY - rightMargin;
+                    int width = termWidth * FixedWidthFontRenderer.FONT_WIDTH + leftMargin + rightMargin;
+                    int height = termHeight * FixedWidthFontRenderer.FONT_HEIGHT + topMargin + bottomMargin;
+
+                    minecraft.getTextureManager().bindTexture( BACKGROUND );
+
+                    Tessellator tesslector = Tessellator.getInstance();
+                    BufferBuilder buffer = tesslector.getBufferBuilder();
+                    buffer.begin( GL11.GL_QUADS, VertexFormats.POSITION_UV );
+                    buffer.vertex( x, y + height, 0 ).texture( 0 / 256.0, height / 256.0 ).next();
+                    buffer.vertex( x + width, y + height, 0 ).texture( width / 256.0, height / 256.0 ).next();
+                    buffer.vertex( x + width, y, 0 ).texture( width / 256.0, 0 / 256.0 ).next();
+                    buffer.vertex( x, y, 0 ).texture( 0 / 256.0, 0 / 256.0 ).next();
+                    tesslector.draw();
                 }
                 finally
                 {
-                    GlStateManager.color( 1.0f, 1.0f, 1.0f, 1.0f );
+                    GlStateManager.color4f( 1.0f, 1.0f, 1.0f, 1.0f );
                 }
             }
         }
@@ -454,19 +419,13 @@ public class WidgetTerminal extends Widget
 
     private void queueEvent( String event )
     {
-        IComputer computer = m_computer.getComputer();
-        if( computer != null )
-        {
-            computer.queueEvent( event );
-        }
+        ClientComputer computer = this.computer.get();
+        if( computer != null ) computer.queueEvent( event );
     }
 
-    private void queueEvent( String event, Object[] args )
+    private void queueEvent( String event, Object... args )
     {
-        IComputer computer = m_computer.getComputer();
-        if( computer != null )
-        {
-            computer.queueEvent( event, args );
-        }
+        ClientComputer computer = this.computer.get();
+        if( computer != null ) computer.queueEvent( event, args );
     }
 }

src/main/java/dan200/computercraft/client/gui/widgets/WidgetWrapper.java

@@ -0,0 +1,113 @@
+/*
+ * This file is part of ComputerCraft - http://www.computercraft.info
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
+ * Send enquiries to dratcliffe@gmail.com
+ */
+
+package dan200.computercraft.client.gui.widgets;
+
+import net.minecraft.client.gui.Element;
+
+public class WidgetWrapper implements Element
+{
+    private final Element listener;
+    private final int x;
+    private final int y;
+    private final int width;
+    private final int height;
+
+    public WidgetWrapper( Element listener, int x, int y, int width, int height )
+    {
+        this.listener = listener;
+        this.x = x;
+        this.y = y;
+        this.width = width;
+        this.height = height;
+    }
+
+    @Override
+    public void mouseMoved( double x, double y )
+    {
+        double dx = x - this.x, dy = y - this.y;
+        if( dx >= 0 && dx < width && dy >= 0 && dy < height ) listener.mouseMoved( dx, dy );
+    }
+
+    @Override
+    public boolean changeFocus( boolean reverse )
+    {
+        return listener.changeFocus( reverse );
+    }
+
+    @Override
+    public boolean mouseClicked( double x, double y, int button )
+    {
+        double dx = x - this.x, dy = y - this.y;
+        return dx >= 0 && dx < width && dy >= 0 && dy < height && listener.mouseClicked( dx, dy, button );
+    }
+
+    @Override
+    public boolean mouseReleased( double x, double y, int button )
+    {
+        double dx = x - this.x, dy = y - this.y;
+        return dx >= 0 && dx < width && dy >= 0 && dy < height && listener.mouseReleased( dx, dy, button );
+    }
+
+    @Override
+    public boolean mouseDragged( double x, double y, int button, double deltaX, double deltaY )
+    {
+        double dx = x - this.x, dy = y - this.y;
+        return dx >= 0 && dx < width && dy >= 0 && dy < height && listener.mouseDragged( dx, dy, button, deltaX, deltaY );
+    }
+
+    @Override
+    public boolean mouseScrolled( double x, double y, double delta )
+    {
+        double dx = x - this.x, dy = y - this.y;
+        return dx >= 0 && dx < width && dy >= 0 && dy < height && listener.mouseScrolled( dx, dy, delta );
+    }
+
+    @Override
+    public boolean keyPressed( int key, int scancode, int modifiers )
+    {
+        return listener.keyPressed( key, scancode, modifiers );
+    }
+
+    @Override
+    public boolean keyReleased( int key, int scancode, int modifiers )
+    {
+        return listener.keyReleased( key, scancode, modifiers );
+    }
+
+    @Override
+    public boolean charTyped( char character, int modifiers )
+    {
+        return listener.charTyped( character, modifiers );
+    }
+
+    public int getX()
+    {
+        return x;
+    }
+
+    public int getY()
+    {
+        return y;
+    }
+
+    public int getWidth()
+    {
+        return width;
+    }
+
+    public int getHeight()
+    {
+        return height;
+    }
+
+    @Override
+    public boolean isMouseOver( double x, double y )
+    {
+        double dx = x - this.x, dy = y - this.y;
+        return dx >= 0 && dx < width && dy >= 0 && dy < height;
+    }
+}

src/main/java/dan200/computercraft/client/proxy/CCTurtleProxyClient.java

@@ -1,214 +0,0 @@
-/*
- * This file is part of ComputerCraft - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
- * Send enquiries to dratcliffe@gmail.com
- */
-
-package dan200.computercraft.client.proxy;
-
-import dan200.computercraft.ComputerCraft;
-import dan200.computercraft.client.render.TileEntityTurtleRenderer;
-import dan200.computercraft.client.render.TurtleSmartItemModel;
-import dan200.computercraft.shared.proxy.CCTurtleProxyCommon;
-import dan200.computercraft.shared.turtle.blocks.TileTurtle;
-import dan200.computercraft.shared.turtle.items.ItemTurtleBase;
-import net.minecraft.block.Block;
-import net.minecraft.client.Minecraft;
-import net.minecraft.client.renderer.ItemMeshDefinition;
-import net.minecraft.client.renderer.block.model.IBakedModel;
-import net.minecraft.client.renderer.block.model.ModelBakery;
-import net.minecraft.client.renderer.block.model.ModelResourceLocation;
-import net.minecraft.client.renderer.color.IItemColor;
-import net.minecraft.client.renderer.texture.TextureMap;
-import net.minecraft.client.renderer.vertex.DefaultVertexFormats;
-import net.minecraft.client.resources.IResourceManager;
-import net.minecraft.client.resources.SimpleReloadableResourceManager;
-import net.minecraft.item.Item;
-import net.minecraft.item.ItemStack;
-import net.minecraft.util.ResourceLocation;
-import net.minecraftforge.client.event.ModelBakeEvent;
-import net.minecraftforge.client.event.ModelRegistryEvent;
-import net.minecraftforge.client.event.TextureStitchEvent;
-import net.minecraftforge.client.model.IModel;
-import net.minecraftforge.client.model.ModelLoader;
-import net.minecraftforge.client.model.ModelLoaderRegistry;
-import net.minecraftforge.common.MinecraftForge;
-import net.minecraftforge.fml.client.registry.ClientRegistry;
-import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
-
-import javax.annotation.Nonnull;
-
-public class CCTurtleProxyClient extends CCTurtleProxyCommon
-{
-    // IComputerCraftProxy implementation
-
-    @Override
-    public void preInit()
-    {
-        super.preInit();
-
-        // Setup client forge handlers
-        registerForgeHandlers();
-    }
-
-    @SubscribeEvent
-    public void registerModels( ModelRegistryEvent event )
-    {
-        // Register item models
-        ItemMeshDefinition turtleMeshDefinition = new ItemMeshDefinition()
-        {
-            private ModelResourceLocation turtle_dynamic = new ModelResourceLocation( "computercraft:turtle_dynamic", "inventory" );
-
-            @Nonnull
-            @Override
-            public ModelResourceLocation getModelLocation( @Nonnull ItemStack stack )
-            {
-                return turtle_dynamic;
-            }
-        };
-        String[] turtleModelNames = new String[] {
-            "turtle_dynamic",
-            "turtle", "turtle_advanced",
-            "turtle_white",
-            "turtle_elf_overlay"
-        };
-        registerItemModel( ComputerCraft.Blocks.turtle, turtleMeshDefinition, turtleModelNames );
-        registerItemModel( ComputerCraft.Blocks.turtleExpanded, turtleMeshDefinition, turtleModelNames );
-        registerItemModel( ComputerCraft.Blocks.turtleAdvanced, turtleMeshDefinition, turtleModelNames );
-    }
-
-    @Override
-    public void init()
-    {
-        super.init();
-
-        // Setup turtle colours
-        Minecraft.getMinecraft().getItemColors().registerItemColorHandler(
-            new TurtleItemColour(),
-            ComputerCraft.Blocks.turtle, ComputerCraft.Blocks.turtleExpanded, ComputerCraft.Blocks.turtleAdvanced
-        );
-
-        // Setup renderers
-        ClientRegistry.bindTileEntitySpecialRenderer( TileTurtle.class, new TileEntityTurtleRenderer() );
-    }
-
-    private void registerItemModel( Block block, ItemMeshDefinition definition, String[] names )
-    {
-        registerItemModel( Item.getItemFromBlock( block ), definition, names );
-    }
-
-    private void registerItemModel( Item item, ItemMeshDefinition definition, String[] names )
-    {
-        ResourceLocation[] resources = new ResourceLocation[names.length];
-        for( int i = 0; i < names.length; i++ )
-        {
-            resources[i] = new ResourceLocation( "computercraft:" + names[i] );
-        }
-        ModelBakery.registerItemVariants( item, resources );
-        ModelLoader.setCustomMeshDefinition( item, definition );
-    }
-
-    private void registerForgeHandlers()
-    {
-        ForgeHandlers handlers = new ForgeHandlers();
-        MinecraftForge.EVENT_BUS.register( handlers );
-    }
-
-    public static class ForgeHandlers
-    {
-        private static final String[] TURTLE_UPGRADES = {
-            "turtle_modem_off_left",
-            "turtle_modem_on_left",
-            "turtle_modem_off_right",
-            "turtle_modem_on_right",
-            "turtle_crafting_table_left",
-            "turtle_crafting_table_right",
-            "advanced_turtle_modem_off_left",
-            "advanced_turtle_modem_on_left",
-            "advanced_turtle_modem_off_right",
-            "advanced_turtle_modem_on_right",
-            "turtle_speaker_upgrade_left",
-            "turtle_speaker_upgrade_right",
-        };
-
-        private TurtleSmartItemModel m_turtleSmartItemModel;
-
-        public ForgeHandlers()
-        {
-            m_turtleSmartItemModel = new TurtleSmartItemModel();
-            IResourceManager resourceManager = Minecraft.getMinecraft().getResourceManager();
-            if( resourceManager instanceof SimpleReloadableResourceManager )
-            {
-                SimpleReloadableResourceManager reloadableResourceManager = (SimpleReloadableResourceManager) resourceManager;
-                reloadableResourceManager.registerReloadListener( m_turtleSmartItemModel );
-            }
-        }
-
-        @SubscribeEvent
-        public void onTextureStitchEvent( TextureStitchEvent.Pre event )
-        {
-            // Load all textures for upgrades
-            TextureMap map = event.getMap();
-            for( String upgrade : TURTLE_UPGRADES )
-            {
-                IModel model = ModelLoaderRegistry.getModelOrMissing( new ResourceLocation( "computercraft", "block/" + upgrade ) );
-                for( ResourceLocation texture : model.getTextures() )
-                {
-                    map.registerSprite( texture );
-                }
-            }
-        }
-
-        @SubscribeEvent
-        public void onModelBakeEvent( ModelBakeEvent event )
-        {
-            // Load all upgrade models
-            for( String upgrade : TURTLE_UPGRADES )
-            {
-                loadModel( event, upgrade );
-            }
-
-            loadSmartModel( event, "turtle_dynamic", m_turtleSmartItemModel );
-        }
-
-        private void loadModel( ModelBakeEvent event, String name )
-        {
-            IModel model = ModelLoaderRegistry.getModelOrMissing(
-                new ResourceLocation( "computercraft", "block/" + name )
-            );
-            IBakedModel bakedModel = model.bake(
-                model.getDefaultState(),
-                DefaultVertexFormats.ITEM,
-                location -> Minecraft.getMinecraft().getTextureMapBlocks().getAtlasSprite( location.toString() )
-            );
-            event.getModelRegistry().putObject(
-                new ModelResourceLocation( "computercraft:" + name, "inventory" ),
-                bakedModel
-            );
-        }
-
-        private void loadSmartModel( ModelBakeEvent event, String name, IBakedModel smartModel )
-        {
-            event.getModelRegistry().putObject(
-                new ModelResourceLocation( "computercraft:" + name, "inventory" ),
-                smartModel
-            );
-        }
-    }
-
-    private static class TurtleItemColour implements IItemColor
-    {
-        @Override
-        public int colorMultiplier( @Nonnull ItemStack stack, int tintIndex )
-        {
-            if( tintIndex == 0 )
-            {
-                ItemTurtleBase turtle = (ItemTurtleBase) stack.getItem();
-                int colour = turtle.getColour( stack );
-                if( colour != -1 ) return colour;
-            }
-
-            return 0xFFFFFF;
-        }
-    }
-}

src/main/java/dan200/computercraft/client/proxy/ComputerCraftProxyClient.java

@@ -7,208 +7,72 @@
 package dan200.computercraft.client.proxy;
 
 import dan200.computercraft.ComputerCraft;
-import dan200.computercraft.client.ClientTableFormatter;
-import dan200.computercraft.client.FrameInfo;
-import dan200.computercraft.client.render.*;
-import dan200.computercraft.shared.command.CommandCopy;
-import dan200.computercraft.shared.command.text.TableBuilder;
-import dan200.computercraft.shared.media.items.ItemDiskLegacy;
+import dan200.computercraft.client.ClientRegistry;
+import dan200.computercraft.client.gui.*;
+import dan200.computercraft.client.render.TileEntityCableRenderer;
+import dan200.computercraft.client.render.TileEntityMonitorRenderer;
+import dan200.computercraft.client.render.TileEntityTurtleRenderer;
+import dan200.computercraft.shared.computer.blocks.TileComputer;
+import dan200.computercraft.shared.computer.core.ClientComputer;
+import dan200.computercraft.shared.computer.inventory.ContainerViewComputer;
+import dan200.computercraft.shared.network.container.*;
 import dan200.computercraft.shared.peripheral.modem.wired.TileCable;
-import dan200.computercraft.shared.peripheral.monitor.ClientMonitor;
 import dan200.computercraft.shared.peripheral.monitor.TileMonitor;
-import dan200.computercraft.shared.proxy.ComputerCraftProxyCommon;
-import dan200.computercraft.shared.util.Colour;
-import net.minecraft.block.Block;
-import net.minecraft.client.Minecraft;
-import net.minecraft.client.renderer.ItemMeshDefinition;
-import net.minecraft.client.renderer.block.model.ModelBakery;
-import net.minecraft.client.renderer.block.model.ModelResourceLocation;
-import net.minecraft.client.renderer.color.IItemColor;
-import net.minecraft.item.Item;
-import net.minecraft.item.ItemStack;
-import net.minecraft.util.ResourceLocation;
-import net.minecraft.util.SoundEvent;
-import net.minecraft.util.math.BlockPos;
-import net.minecraft.world.World;
-import net.minecraftforge.client.ClientCommandHandler;
-import net.minecraftforge.client.event.ModelRegistryEvent;
-import net.minecraftforge.client.model.ModelLoader;
-import net.minecraftforge.common.MinecraftForge;
-import net.minecraftforge.event.world.WorldEvent;
-import net.minecraftforge.fml.client.registry.ClientRegistry;
-import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
-import net.minecraftforge.fml.relauncher.Side;
-import net.minecraftforge.fml.relauncher.SideOnly;
+import dan200.computercraft.shared.turtle.blocks.TileTurtle;
+import dan200.computercraft.shared.turtle.inventory.ContainerTurtle;
+import net.fabricmc.fabric.api.client.render.BlockEntityRendererRegistry;
 
-import javax.annotation.Nonnull;
-import java.io.File;
-
-public class ComputerCraftProxyClient extends ComputerCraftProxyCommon
+public final class ComputerCraftProxyClient
 {
-    @Override
-    public void preInit()
+    public static void setup()
     {
-        super.preInit();
+        registerContainers();
 
-        // Setup client forge handlers
-        registerForgeHandlers();
+        // Setup TESRs
+        BlockEntityRendererRegistry.INSTANCE.register( TileMonitor.class, new TileEntityMonitorRenderer() );
+        BlockEntityRendererRegistry.INSTANCE.register( TileCable.class, new TileEntityCableRenderer() );
+        BlockEntityRendererRegistry.INSTANCE.register( TileTurtle.class, new TileEntityTurtleRenderer() );
 
-        // Register any client-specific commands
-        ClientCommandHandler.instance.registerCommand( CommandCopy.INSTANCE );
+        ClientRegistry.onItemColours();
     }
 
-    @SubscribeEvent
-    public void registerModels( ModelRegistryEvent event )
+    private static void registerContainers()
     {
-        // Register item models
-        registerItemModel( ComputerCraft.Blocks.computer, "computer" );
-        registerItemModel( ComputerCraft.Blocks.peripheral, 0, "peripheral" );
-        registerItemModel( ComputerCraft.Blocks.peripheral, 1, "wireless_modem" );
-        registerItemModel( ComputerCraft.Blocks.peripheral, 2, "monitor" );
-        registerItemModel( ComputerCraft.Blocks.peripheral, 3, "printer" );
-        registerItemModel( ComputerCraft.Blocks.peripheral, 4, "advanced_monitor" );
-        registerItemModel( ComputerCraft.Blocks.cable, 0, "cable" );
-        registerItemModel( ComputerCraft.Blocks.cable, 1, "wired_modem" );
-        registerItemModel( ComputerCraft.Blocks.commandComputer, "command_computer" );
-        registerItemModel( ComputerCraft.Blocks.advancedModem, "advanced_modem" );
-        registerItemModel( ComputerCraft.Blocks.peripheral, 5, "speaker" );
-        registerItemModel( ComputerCraft.Blocks.wiredModemFull, "wired_modem_full" );
+        ContainerType.registerGui( TileEntityContainerType::computer, ( id, packet, player ) ->
+            GuiComputer.create( id, (TileComputer) packet.getTileEntity( player ), player.inventory ) );
+        ContainerType.registerGui( TileEntityContainerType::diskDrive, GuiDiskDrive::new );
+        ContainerType.registerGui( TileEntityContainerType::printer, GuiPrinter::new );
+        ContainerType.registerGui( TileEntityContainerType::turtle, ( id, packet, player ) -> {
+            TileTurtle turtle = (TileTurtle) packet.getTileEntity( player );
+            return new GuiTurtle( turtle, new ContainerTurtle( id, player.inventory, turtle.getAccess(), turtle.getClientComputer() ), player.inventory );
+        } );
 
-        registerItemModel( ComputerCraft.Items.disk, "disk" );
-        registerItemModel( ComputerCraft.Items.diskExpanded, "disk_expanded" );
-        registerItemModel( ComputerCraft.Items.treasureDisk, "treasure_disk" );
-        registerItemModel( ComputerCraft.Items.printout, 0, "printout" );
-        registerItemModel( ComputerCraft.Items.printout, 1, "pages" );
-        registerItemModel( ComputerCraft.Items.printout, 2, "book" );
-        registerItemModel( ComputerCraft.Items.pocketComputer, "pocket_computer" );
-    }
-
-    @Override
-    public void init()
-    {
-        super.init();
-
-        // Load textures
-        Minecraft mc = Minecraft.getMinecraft();
-
-        // Setup
-        mc.getItemColors().registerItemColorHandler( new DiskColorHandler( ComputerCraft.Items.disk ), ComputerCraft.Items.disk );
-        mc.getItemColors().registerItemColorHandler( new DiskColorHandler( ComputerCraft.Items.diskExpanded ), ComputerCraft.Items.diskExpanded );
-
-        mc.getItemColors().registerItemColorHandler( ( stack, layer ) ->
-        {
-            switch( layer )
+        ContainerType.registerGui( PocketComputerContainerType::new, GuiPocketComputer::new );
+        ContainerType.registerGui( PrintoutContainerType::new, GuiPrintout::new );
+        ContainerType.registerGui( ViewComputerContainerType::new, ( id, packet, player ) -> {
+            ClientComputer computer = ComputerCraft.clientComputerRegistry.get( packet.instanceId );
+            if( computer == null )
             {
-                case 0:
-                default:
-                    return 0xFFFFFF;
-                case 1:
-                {
-                    // Frame colour
-                    int colour = ComputerCraft.Items.pocketComputer.getColour( stack );
-                    return colour == -1 ? 0xFFFFFF : colour;
-                }
-                case 2:
-                {
-                    // Light colour
-                    int colour = ComputerCraft.Items.pocketComputer.getLightState( stack );
-                    return colour == -1 ? Colour.Black.getHex() : colour;
-                }
+                ComputerCraft.clientComputerRegistry.add( packet.instanceId, computer = new ClientComputer( packet.instanceId ) );
             }
-        }, ComputerCraft.Items.pocketComputer );
 
-        // Setup renderers
-        ClientRegistry.bindTileEntitySpecialRenderer( TileMonitor.class, new TileEntityMonitorRenderer() );
-        ClientRegistry.bindTileEntitySpecialRenderer( TileCable.class, new TileEntityCableRenderer() );
-    }
-
-    private void registerItemModel( Block block, int damage, String name )
-    {
-        registerItemModel( Item.getItemFromBlock( block ), damage, name );
-    }
-
-    private void registerItemModel( Item item, int damage, String name )
-    {
-        ModelResourceLocation res = new ModelResourceLocation( "computercraft:" + name, "inventory" );
-        ModelBakery.registerItemVariants( item, new ResourceLocation( "computercraft", name ) );
-        ModelLoader.setCustomModelResourceLocation( item, damage, res );
-    }
-
-    private void registerItemModel( Block block, String name )
-    {
-        registerItemModel( Item.getItemFromBlock( block ), name );
-    }
-
-    private void registerItemModel( Item item, String name )
-    {
-        final ModelResourceLocation res = new ModelResourceLocation( "computercraft:" + name, "inventory" );
-        ModelBakery.registerItemVariants( item, new ResourceLocation( "computercraft", name ) );
-        ModelLoader.setCustomMeshDefinition( item, new ItemMeshDefinition()
-        {
-            @Nonnull
-            @Override
-            public ModelResourceLocation getModelLocation( @Nonnull ItemStack stack )
-            {
-                return res;
-            }
+            ContainerViewComputer container = new ContainerViewComputer( id, computer );
+            return new GuiComputer<>( container, player.inventory, packet.family, computer, packet.width, packet.height );
         } );
     }
 
-    @Override
-    public File getWorldDir( World world )
-    {
-        return world.getSaveHandler().getWorldDirectory();
-    }
-
-    private void registerForgeHandlers()
-    {
-        MinecraftForge.EVENT_BUS.register( new ForgeHandlers() );
-        MinecraftForge.EVENT_BUS.register( new RenderOverlayCable() );
-        MinecraftForge.EVENT_BUS.register( new ItemPocketRenderer() );
-        MinecraftForge.EVENT_BUS.register( new ItemPrintoutRenderer() );
-        MinecraftForge.EVENT_BUS.register( FrameInfo.instance() );
-    }
-
-    @Override
-    public void playRecordClient( BlockPos pos, SoundEvent record, String info )
-    {
-        Minecraft mc = Minecraft.getMinecraft();
-        mc.world.playRecord( pos, record );
-        if( info != null ) mc.ingameGUI.setRecordPlayingMessage( info );
-    }
-
-    @Override
-    public void showTableClient( TableBuilder table )
-    {
-        ClientTableFormatter.INSTANCE.display( table );
-    }
-
-    public class ForgeHandlers
+    /*
+    @Mod.EventBusSubscriber( modid = ComputerCraft.MOD_ID, value = Dist.CLIENT )
+    public static final class ForgeHandlers
     {
         @SubscribeEvent
-        public void onWorldUnload( WorldEvent.Unload event )
+        public static void onWorldUnload( WorldEvent.Unload event )
         {
-            if( event.getWorld().isRemote )
+            if( event.getWorld().isRemote() )
             {
                 ClientMonitor.destroyAll();
             }
         }
     }
-
-    @SideOnly( Side.CLIENT )
-    private static class DiskColorHandler implements IItemColor
-    {
-        private final ItemDiskLegacy disk;
-
-        private DiskColorHandler( ItemDiskLegacy disk )
-        {
-            this.disk = disk;
-        }
-
-        @Override
-        public int colorMultiplier( @Nonnull ItemStack stack, int layer )
-        {
-            return layer == 0 ? 0xFFFFFF : disk.getColour( stack );
-        }
-    }
+    */
 }

src/main/java/dan200/computercraft/client/render/ItemMapLikeRenderer.java

@@ -6,13 +6,14 @@
 
 package dan200.computercraft.client.render;
 
-import net.minecraft.client.Minecraft;
-import net.minecraft.client.renderer.GlStateManager;
-import net.minecraft.client.renderer.ItemRenderer;
-import net.minecraft.entity.player.EntityPlayer;
+import com.mojang.blaze3d.platform.GlStateManager;
+import dan200.computercraft.shared.mixed.MixedFirstPersonRenderer;
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.client.render.FirstPersonRenderer;
+import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.item.ItemStack;
-import net.minecraft.util.EnumHand;
-import net.minecraft.util.EnumHandSide;
+import net.minecraft.util.AbsoluteHand;
+import net.minecraft.util.Hand;
 import net.minecraft.util.math.MathHelper;
 
 public abstract class ItemMapLikeRenderer
@@ -21,23 +22,23 @@ public abstract class ItemMapLikeRenderer
      * The main rendering method for the item
      *
      * @param stack The stack to render
-     * @see ItemRenderer#renderMapFirstPerson(ItemStack)
+     * @see FirstPersonRenderer#renderFirstPersonMap(ItemStack)
      */
     protected abstract void renderItem( ItemStack stack );
 
-    protected void renderItemFirstPerson( EnumHand hand, float pitch, float equipProgress, float swingProgress, ItemStack stack )
+    public void renderItemFirstPerson( Hand hand, float pitch, float equipProgress, float swingProgress, ItemStack stack )
     {
-        EntityPlayer player = Minecraft.getMinecraft().player;
+        PlayerEntity player = MinecraftClient.getInstance().player;
 
         GlStateManager.pushMatrix();
-        if( hand == EnumHand.MAIN_HAND && player.getHeldItemOffhand().isEmpty() )
+        if( hand == Hand.MAIN && player.getOffHandStack().isEmpty() )
         {
             renderItemFirstPersonCenter( pitch, equipProgress, swingProgress, stack );
         }
         else
         {
             renderItemFirstPersonSide(
-                hand == EnumHand.MAIN_HAND ? player.getPrimaryHand() : player.getPrimaryHand().opposite(),
+                hand == Hand.MAIN ? player.getMainHand() : player.getMainHand().getOpposite(),
                 equipProgress, swingProgress, stack
             );
         }
@@ -51,35 +52,35 @@ public abstract class ItemMapLikeRenderer
      * @param equipProgress The equip progress of this item
      * @param swingProgress The swing progress of this item
      * @param stack         The stack to render
-     * @see ItemRenderer#renderMapFirstPersonSide(float, EnumHandSide, float, ItemStack)
+     * @see FirstPersonRenderer#method_3222(float, AbsoluteHand, float, ItemStack) // renderMapFirstPersonSide
      */
-    private void renderItemFirstPersonSide( EnumHandSide side, float equipProgress, float swingProgress, ItemStack stack )
+    private void renderItemFirstPersonSide( AbsoluteHand side, float equipProgress, float swingProgress, ItemStack stack )
     {
-        Minecraft minecraft = Minecraft.getMinecraft();
-        float offset = side == EnumHandSide.RIGHT ? 1f : -1f;
-        GlStateManager.translate( offset * 0.125f, -0.125f, 0f );
+        MinecraftClient minecraft = MinecraftClient.getInstance();
+        float offset = side == AbsoluteHand.RIGHT ? 1f : -1f;
+        GlStateManager.translatef( offset * 0.125f, -0.125f, 0f );
 
         // If the player is not invisible then render a single arm
         if( !minecraft.player.isInvisible() )
         {
             GlStateManager.pushMatrix();
-            GlStateManager.rotate( offset * 10f, 0f, 0f, 1f );
-            minecraft.getItemRenderer().renderArmFirstPerson( equipProgress, swingProgress, side );
+            GlStateManager.rotatef( offset * 10f, 0f, 0f, 1f );
+            ((MixedFirstPersonRenderer) minecraft.getFirstPersonRenderer()).renderArmFirstPerson_CC( equipProgress, swingProgress, side );
             GlStateManager.popMatrix();
         }
 
         // Setup the appropriate transformations. This is just copied from the
         // corresponding method in ItemRenderer.
         GlStateManager.pushMatrix();
-        GlStateManager.translate( offset * 0.51f, -0.08f + equipProgress * -1.2f, -0.75f );
+        GlStateManager.translatef( offset * 0.51f, -0.08f + equipProgress * -1.2f, -0.75f );
         float f1 = MathHelper.sqrt( swingProgress );
         float f2 = MathHelper.sin( f1 * (float) Math.PI );
         float f3 = -0.5f * f2;
         float f4 = 0.4f * MathHelper.sin( f1 * ((float) Math.PI * 2f) );
         float f5 = -0.3f * MathHelper.sin( swingProgress * (float) Math.PI );
-        GlStateManager.translate( offset * f3, f4 - 0.3f * f2, f5 );
-        GlStateManager.rotate( f2 * -45f, 1f, 0f, 0f );
-        GlStateManager.rotate( offset * f2 * -30f, 0f, 1f, 0f );
+        GlStateManager.translatef( offset * f3, f4 - 0.3f * f2, f5 );
+        GlStateManager.rotatef( f2 * -45f, 1f, 0f, 0f );
+        GlStateManager.rotatef( offset * f2 * -30f, 0f, 1f, 0f );
 
         renderItem( stack );
 
@@ -93,25 +94,25 @@ public abstract class ItemMapLikeRenderer
      * @param equipProgress The equip progress of this item
      * @param swingProgress The swing progress of this item
      * @param stack         The stack to render
-     * @see ItemRenderer#renderMapFirstPerson(float, float, float)
+     * @see FirstPersonRenderer#renderFirstPersonMap(float, float, float)
      */
     private void renderItemFirstPersonCenter( float pitch, float equipProgress, float swingProgress, ItemStack stack )
     {
-        ItemRenderer itemRenderer = Minecraft.getMinecraft().getItemRenderer();
+        MixedFirstPersonRenderer renderer = (MixedFirstPersonRenderer) MinecraftClient.getInstance().getFirstPersonRenderer();
 
         // Setup the appropriate transformations. This is just copied from the
         // corresponding method in ItemRenderer.
         float swingRt = MathHelper.sqrt( swingProgress );
         float tX = -0.2f * MathHelper.sin( swingProgress * (float) Math.PI );
         float tZ = -0.4f * MathHelper.sin( swingRt * (float) Math.PI );
-        GlStateManager.translate( 0f, -tX / 2f, tZ );
-        float pitchAngle = itemRenderer.getMapAngleFromPitch( pitch );
-        GlStateManager.translate( 0f, 0.04f + equipProgress * -1.2f + pitchAngle * -0.5f, -0.72f );
-        GlStateManager.rotate( pitchAngle * -85f, 1f, 0f, 0f );
-        itemRenderer.renderArms();
+        GlStateManager.translatef( 0f, -tX / 2f, tZ );
+        float pitchAngle = renderer.getMapAngleFromPitch_CC( pitch );
+        GlStateManager.translatef( 0f, 0.04f + equipProgress * -1.2f + pitchAngle * -0.5f, -0.72f );
+        GlStateManager.rotatef( pitchAngle * -85f, 1f, 0f, 0f );
+        renderer.renderArms_CC();
         float rX = MathHelper.sin( swingRt * (float) Math.PI );
-        GlStateManager.rotate( rX * 20f, 1f, 0f, 0f );
-        GlStateManager.scale( 2f, 2f, 2f );
+        GlStateManager.rotatef( rX * 20f, 1f, 0f, 0f );
+        GlStateManager.scalef( 2f, 2f, 2f );
 
         renderItem( stack );
     }

src/main/java/dan200/computercraft/client/render/ItemPocketRenderer.java

@@ -6,7 +6,7 @@
 
 package dan200.computercraft.client.render;
 
-import dan200.computercraft.ComputerCraft;
+import com.mojang.blaze3d.platform.GlStateManager;
 import dan200.computercraft.client.FrameInfo;
 import dan200.computercraft.client.gui.FixedWidthFontRenderer;
 import dan200.computercraft.core.terminal.Terminal;
@@ -14,19 +14,15 @@ import dan200.computercraft.core.terminal.TextBuffer;
 import dan200.computercraft.shared.computer.core.ClientComputer;
 import dan200.computercraft.shared.pocket.items.ItemPocketComputer;
 import dan200.computercraft.shared.util.Palette;
-import net.minecraft.client.Minecraft;
-import net.minecraft.client.renderer.GlStateManager;
-import net.minecraft.client.renderer.RenderItem;
-import net.minecraft.client.renderer.block.model.IBakedModel;
-import net.minecraft.client.renderer.block.model.ItemCameraTransforms;
-import net.minecraft.client.renderer.texture.TextureManager;
-import net.minecraft.client.renderer.texture.TextureMap;
+import net.fabricmc.api.EnvType;
+import net.fabricmc.api.Environment;
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.client.render.item.ItemRenderer;
+import net.minecraft.client.render.model.BakedModel;
+import net.minecraft.client.render.model.json.ModelTransformation;
+import net.minecraft.client.texture.SpriteAtlasTexture;
+import net.minecraft.client.texture.TextureManager;
 import net.minecraft.item.ItemStack;
-import net.minecraftforge.client.ForgeHooksClient;
-import net.minecraftforge.client.event.RenderSpecificHandEvent;
-import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
-import net.minecraftforge.fml.relauncher.Side;
-import net.minecraftforge.fml.relauncher.SideOnly;
 import org.lwjgl.opengl.GL11;
 
 import static dan200.computercraft.client.gui.FixedWidthFontRenderer.FONT_HEIGHT;
@@ -35,60 +31,55 @@ import static dan200.computercraft.client.gui.FixedWidthFontRenderer.FONT_WIDTH;
 /**
  * Emulates map rendering for pocket computers
  */
-@SideOnly( Side.CLIENT )
-public class ItemPocketRenderer extends ItemMapLikeRenderer
+@Environment( EnvType.CLIENT )
+public final class ItemPocketRenderer extends ItemMapLikeRenderer
 {
-    @SubscribeEvent
-    public void renderItem( RenderSpecificHandEvent event )
-    {
-        ItemStack stack = event.getItemStack();
-        if( !(stack.getItem() instanceof ItemPocketComputer) ) return;
+    public static final ItemPocketRenderer INSTANCE = new ItemPocketRenderer();
 
-        event.setCanceled( true );
-        renderItemFirstPerson( event.getHand(), event.getInterpolatedPitch(), event.getEquipProgress(), event.getSwingProgress(), event.getItemStack() );
+    private ItemPocketRenderer()
+    {
     }
 
     @Override
     protected void renderItem( ItemStack stack )
     {
-        // Setup various transformations. Note that these are partially adapated from the corresponding method
+        // Setup various transformations. Note that these are partially adapted from the corresponding method
         // in ItemRenderer
         GlStateManager.disableLighting();
 
-        GlStateManager.rotate( 180f, 0f, 1f, 0f );
-        GlStateManager.rotate( 180f, 0f, 0f, 1f );
-        GlStateManager.scale( 0.5, 0.5, 0.5 );
+        GlStateManager.rotatef( 180f, 0f, 1f, 0f );
+        GlStateManager.rotatef( 180f, 0f, 0f, 1f );
+        GlStateManager.scalef( 0.5f, 0.5f, 0.5f );
 
-        ItemPocketComputer pocketComputer = ComputerCraft.Items.pocketComputer;
-        ClientComputer computer = pocketComputer.createClientComputer( stack );
+        ClientComputer computer = ItemPocketComputer.createClientComputer( stack );
 
         {
             // First render the background item. We use the item's model rather than a direct texture as this ensures
             // we display the pocket light and other such decorations.
             GlStateManager.pushMatrix();
 
-            GlStateManager.scale( 1.0f, -1.0f, 1.0f );
+            GlStateManager.scalef( 1.0f, -1.0f, 1.0f );
 
-            Minecraft minecraft = Minecraft.getMinecraft();
+            MinecraftClient minecraft = MinecraftClient.getInstance();
             TextureManager textureManager = minecraft.getTextureManager();
-            RenderItem renderItem = minecraft.getRenderItem();
+            ItemRenderer renderItem = minecraft.getItemRenderer();
 
             // Copy of RenderItem#renderItemModelIntoGUI but without the translation or scaling
-            textureManager.bindTexture( TextureMap.LOCATION_BLOCKS_TEXTURE );
-            textureManager.getTexture( TextureMap.LOCATION_BLOCKS_TEXTURE ).setBlurMipmap( false, false );
+            textureManager.bindTexture( SpriteAtlasTexture.BLOCK_ATLAS_TEX );
+            textureManager.getTexture( SpriteAtlasTexture.BLOCK_ATLAS_TEX ).pushFilter( false, false );
 
             GlStateManager.enableRescaleNormal();
-            GlStateManager.enableAlpha();
+            GlStateManager.enableAlphaTest();
             GlStateManager.alphaFunc( GL11.GL_GREATER, 0.1F );
             GlStateManager.enableBlend();
             GlStateManager.blendFunc( GlStateManager.SourceFactor.SRC_ALPHA, GlStateManager.DestFactor.ONE_MINUS_SRC_ALPHA );
-            GlStateManager.color( 1.0F, 1.0F, 1.0F, 1.0F );
+            GlStateManager.color4f( 1.0F, 1.0F, 1.0F, 1.0F );
 
-            IBakedModel bakedmodel = renderItem.getItemModelWithOverrides( stack, null, null );
-            bakedmodel = ForgeHooksClient.handleCameraTransforms( bakedmodel, ItemCameraTransforms.TransformType.GUI, false );
-            renderItem.renderItem( stack, bakedmodel );
+            BakedModel baked = renderItem.getModel( stack, null, null );
+            baked.getTransformation().applyGl( ModelTransformation.Type.GUI );
+            renderItem.renderItemAndGlow( stack, baked );
 
-            GlStateManager.disableAlpha();
+            GlStateManager.disableAlphaTest();
             GlStateManager.disableRescaleNormal();
 
             GlStateManager.popMatrix();
@@ -103,13 +94,13 @@ public class ItemPocketRenderer extends ItemMapLikeRenderer
                 synchronized( terminal )
                 {
                     GlStateManager.pushMatrix();
-                    GlStateManager.disableDepth();
+                    GlStateManager.disableDepthTest();
 
                     // Reset the position to be at the top left corner of the pocket computer
                     // Note we translate towards the screen slightly too.
-                    GlStateManager.translate( -8 / 16.0, -8 / 16.0, 0.5 / 16.0 );
+                    GlStateManager.translated( -8 / 16.0, -8 / 16.0, 0.5 / 16.0 );
                     // Translate to the top left of the screen.
-                    GlStateManager.translate( 4 / 16.0, 3 / 16.0, 0 );
+                    GlStateManager.translated( 4 / 16.0, 3 / 16.0, 0 );
 
                     // Work out the scaling required to resize the terminal in order to fit on the computer
                     final int margin = 2;
@@ -121,7 +112,7 @@ public class ItemPocketRenderer extends ItemMapLikeRenderer
 
                     // The grid is 8 * 8 wide, so we start with a base of 1/2 (8 / 16).
                     double scale = 1.0 / 2.0 / max;
-                    GlStateManager.scale( scale, scale, scale );
+                    GlStateManager.scaled( scale, scale, scale );
 
                     // The margin/start positions are determined in order for the terminal to be centred.
                     int startX = (max - width) / 2 + margin;
@@ -145,7 +136,7 @@ public class ItemPocketRenderer extends ItemMapLikeRenderer
 
                     // And render the cursor;
                     int tx = terminal.getCursorX(), ty = terminal.getCursorY();
-                    if( terminal.getCursorBlink() && FrameInfo.instance().getGlobalCursorBlink() &&
+                    if( terminal.getCursorBlink() && FrameInfo.getGlobalCursorBlink() &&
                         tx >= 0 && ty >= 0 && tx < tw && ty < th )
                     {
                         TextBuffer cursorColour = new TextBuffer( "0123456789abcdef".charAt( terminal.getTextColour() ), 1 );
@@ -155,7 +146,7 @@ public class ItemPocketRenderer extends ItemMapLikeRenderer
                         );
                     }
 
-                    GlStateManager.enableDepth();
+                    GlStateManager.enableDepthTest();
                     GlStateManager.popMatrix();
                 }
             }

src/main/java/dan200/computercraft/client/render/ItemPrintoutRenderer.java

@@ -6,13 +6,12 @@
 
 package dan200.computercraft.client.render;
 
-import dan200.computercraft.ComputerCraft;
+import com.mojang.blaze3d.platform.GlStateManager;
 import dan200.computercraft.shared.media.items.ItemPrintout;
-import net.minecraft.client.renderer.GlStateManager;
+import net.fabricmc.api.EnvType;
+import net.fabricmc.api.Environment;
+import net.minecraft.entity.decoration.ItemFrameEntity;
 import net.minecraft.item.ItemStack;
-import net.minecraftforge.client.event.RenderItemInFrameEvent;
-import net.minecraftforge.client.event.RenderSpecificHandEvent;
-import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
 
 import static dan200.computercraft.client.gui.FixedWidthFontRenderer.FONT_HEIGHT;
 import static dan200.computercraft.client.gui.FixedWidthFontRenderer.FONT_WIDTH;
@@ -20,61 +19,70 @@ import static dan200.computercraft.client.render.PrintoutRenderer.*;
 import static dan200.computercraft.shared.media.items.ItemPrintout.LINES_PER_PAGE;
 import static dan200.computercraft.shared.media.items.ItemPrintout.LINE_MAX_LENGTH;
 
-public class ItemPrintoutRenderer extends ItemMapLikeRenderer
+/**
+ * Emulates map and item-frame rendering for printouts
+ */
+@Environment( EnvType.CLIENT )
+public final class ItemPrintoutRenderer extends ItemMapLikeRenderer
 {
+    public static final ItemPrintoutRenderer INSTANCE = new ItemPrintoutRenderer();
+
+    private ItemPrintoutRenderer()
+    {
+    }
+
+    /*
     @SubscribeEvent
-    public void onRenderInHand( RenderSpecificHandEvent event )
+    public static void onRenderInHand( RenderSpecificHandEvent event )
     {
         ItemStack stack = event.getItemStack();
-        if( stack.getItem() != ComputerCraft.Items.printout ) return;
+        if( !(stack.getItem() instanceof ItemPrintout) ) return;
 
         event.setCanceled( true );
-
-        renderItemFirstPerson( event.getHand(), event.getInterpolatedPitch(), event.getEquipProgress(), event.getSwingProgress(), event.getItemStack() );
+        INSTANCE.renderItemFirstPerson( event.getHand(), event.getInterpolatedPitch(), event.getEquipProgress(), event.getSwingProgress(), event.getItemStack() );
     }
+    */
 
     @Override
     protected void renderItem( ItemStack stack )
     {
         // Setup various transformations. Note that these are partially adapated from the corresponding method
-        // in ItemRenderer.renderMapFirstPerson
+        // in FirstPersonRenderer.renderFirstPersonMap
         GlStateManager.disableLighting();
 
-        GlStateManager.rotate( 180f, 0f, 1f, 0f );
-        GlStateManager.rotate( 180f, 0f, 0f, 1f );
-        GlStateManager.scale( 0.42f, 0.42f, -0.42f );
-        GlStateManager.translate( -0.5f, -0.48f, 0.0f );
+        GlStateManager.rotatef( 180f, 0f, 1f, 0f );
+        GlStateManager.rotatef( 180f, 0f, 0f, 1f );
+        GlStateManager.scalef( 0.42f, 0.42f, -0.42f );
+        GlStateManager.translatef( -0.5f, -0.48f, 0.0f );
 
         drawPrintout( stack );
 
         GlStateManager.enableLighting();
     }
 
-    @SubscribeEvent
-    public void onRenderInFrame( RenderItemInFrameEvent event )
+    public void renderInFrame( ItemFrameEntity entity, ItemStack stack )
     {
-        ItemStack stack = event.getItem();
-        if( stack.getItem() != ComputerCraft.Items.printout ) return;
-
-        event.setCanceled( true );
-
         GlStateManager.disableLighting();
 
+        int rotation = entity.getRotation();
+        GlStateManager.rotatef( (float) rotation * 360.0F / 8.0F, 0.0F, 0.0F, 1.0F );
+
         // Move a little bit forward to ensure we're not clipping with the frame
-        GlStateManager.translate( 0.0f, 0.0f, -0.001f );
-        GlStateManager.rotate( 180f, 0f, 0f, 1f );
-        GlStateManager.scale( 0.95f, 0.95f, -0.95f );
-        GlStateManager.translate( -0.5f, -0.5f, 0.0f );
+        GlStateManager.translatef( 0.0f, 0.0f, -0.001f );
+        GlStateManager.rotatef( 180f, 0f, 0f, 1f );
+        GlStateManager.scalef( 0.95f, 0.95f, -0.95f );
+        GlStateManager.translatef( -0.5f, -0.5f, 0.0f );
 
         drawPrintout( stack );
 
         GlStateManager.enableLighting();
+        GlStateManager.disableBlend();
     }
 
     private static void drawPrintout( ItemStack stack )
     {
         int pages = ItemPrintout.getPageCount( stack );
-        boolean book = ItemPrintout.getType( stack ) == ItemPrintout.Type.Book;
+        boolean book = ((ItemPrintout) stack.getItem()).getType() == ItemPrintout.Type.BOOK;
 
         double width = LINE_MAX_LENGTH * FONT_WIDTH + X_TEXT_MARGIN * 2;
         double height = LINES_PER_PAGE * FONT_HEIGHT + Y_TEXT_MARGIN * 2;
@@ -95,8 +103,8 @@ public class ItemPrintoutRenderer extends ItemMapLikeRenderer
 
         // Scale the printout to fit correctly.
         double scale = 1.0 / max;
-        GlStateManager.scale( scale, scale, scale );
-        GlStateManager.translate( (max - width) / 2.0f, (max - height) / 2.0f, 0.0f );
+        GlStateManager.scaled( scale, scale, scale );
+        GlStateManager.translated( (max - width) / 2.0, (max - height) / 2.0, 0.0 );
 
         drawBorder( 0, 0, -0.01, 0, pages, book );
         drawText( X_TEXT_MARGIN, Y_TEXT_MARGIN, 0, ItemPrintout.getText( stack ), ItemPrintout.getColours( stack ) );

src/main/java/dan200/computercraft/client/render/ModelTransformer.java

@@ -6,19 +6,13 @@
 
 package dan200.computercraft.client.render;
 
-import net.minecraft.client.renderer.block.model.BakedQuad;
-import net.minecraft.client.renderer.texture.TextureAtlasSprite;
-import net.minecraft.client.renderer.vertex.VertexFormat;
-import net.minecraft.util.EnumFacing;
-import net.minecraftforge.client.model.pipeline.IVertexConsumer;
-import net.minecraftforge.client.model.pipeline.LightUtil;
-import net.minecraftforge.client.model.pipeline.VertexTransformer;
-import net.minecraftforge.common.model.TRSRTransformation;
+import net.minecraft.client.render.VertexFormat;
+import net.minecraft.client.render.VertexFormatElement;
+import net.minecraft.client.render.VertexFormats;
+import net.minecraft.client.render.model.BakedQuad;
 
-import javax.annotation.Nonnull;
 import javax.vecmath.Matrix4f;
-import javax.vecmath.Point3f;
-import javax.vecmath.Vector3f;
+import javax.vecmath.Vector4f;
 import java.util.List;
 
 /**
@@ -40,6 +34,11 @@ public final class ModelTransformer
     }
 
     public static void transformQuadsTo( List<BakedQuad> output, List<BakedQuad> input, Matrix4f transform )
+    {
+        transformQuadsTo( VertexFormats.POSITION_COLOR_UV_NORMAL, output, input, transform );
+    }
+
+    public static void transformQuadsTo( VertexFormat format, List<BakedQuad> output, List<BakedQuad> input, Matrix4f transform )
     {
         if( transform == null || transform.equals( identity ) )
         {
@@ -47,224 +46,55 @@ public final class ModelTransformer
         }
         else
         {
-            Matrix4f normalMatrix = new Matrix4f( transform );
-            normalMatrix.invert();
-            normalMatrix.transpose();
-
-            for( BakedQuad quad : input ) output.add( doTransformQuad( quad, transform, normalMatrix ) );
+            for( BakedQuad quad : input ) output.add( doTransformQuad( format, quad, transform ) );
         }
     }
 
-    public static BakedQuad transformQuad( BakedQuad input, Matrix4f transform )
+    public static BakedQuad transformQuad( VertexFormat format, BakedQuad input, Matrix4f transform )
     {
         if( transform == null || transform.equals( identity ) ) return input;
-
-        Matrix4f normalMatrix = new Matrix4f( transform );
-        normalMatrix.invert();
-        normalMatrix.transpose();
-        return doTransformQuad( input, transform, normalMatrix );
+        return doTransformQuad( format, input, transform );
     }
 
-    private static BakedQuad doTransformQuad( BakedQuad input, Matrix4f positionMatrix, Matrix4f normalMatrix )
+    private static BakedQuad doTransformQuad( VertexFormat format, BakedQuad quad, Matrix4f transform )
     {
-
-        BakedQuadBuilder builder = new BakedQuadBuilder( input.getFormat() );
-        NormalAwareTransformer transformer = new NormalAwareTransformer( builder, positionMatrix, normalMatrix );
-        input.pipe( transformer );
-
-        if( transformer.areNormalsInverted() )
+        int[] vertexData = quad.getVertexData().clone();
+        int offset = 0;
+        BakedQuad copy = new BakedQuad( vertexData, -1, quad.getFace(), quad.getSprite() );
+        for( int i = 0; i < format.getElementCount(); ++i ) // For each vertex element
         {
-            builder.swap( 1, 3 );
-            transformer.areNormalsInverted();
-        }
-
-        return builder.build();
-    }
-
-    /**
-     * A vertex transformer that tracks whether the normals have been inverted and so the vertices
-     * should be reordered so backface culling works as expected.
-     */
-    private static class NormalAwareTransformer extends VertexTransformer
-    {
-        private final Matrix4f positionMatrix;
-        private final Matrix4f normalMatrix;
-
-        private int vertexIndex = 0, elementIndex = 0;
-        private final Point3f[] before = new Point3f[4];
-        private final Point3f[] after = new Point3f[4];
-
-        public NormalAwareTransformer( IVertexConsumer parent, Matrix4f positionMatrix, Matrix4f normalMatrix )
-        {
-            super( parent );
-            this.positionMatrix = positionMatrix;
-            this.normalMatrix = normalMatrix;
-        }
-
-        @Override
-        public void setQuadOrientation( @Nonnull EnumFacing orientation )
-        {
-            super.setQuadOrientation( orientation == null ? orientation : TRSRTransformation.rotate( positionMatrix, orientation ) );
-        }
-
-        @Override
-        public void put( int element, @Nonnull float... data )
-        {
-            switch( getVertexFormat().getElement( element ).getUsage() )
+            VertexFormatElement element = format.getElement( i );
+            if( element.isPosition() &&
+                element.getFormat() == VertexFormatElement.Format.FLOAT &&
+                element.getCount() == 3 ) // When we find a position element
             {
-                case POSITION:
+                for( int j = 0; j < 4; ++j ) // For each corner of the quad
                 {
-                    Point3f vec = new Point3f( data );
-                    Point3f newVec = new Point3f();
-                    positionMatrix.transform( vec, newVec );
+                    int start = offset + j * format.getVertexSize();
+                    if( (start % 4) == 0 )
+                    {
+                        start = start / 4;
 
-                    float[] newData = new float[4];
-                    newVec.get( newData );
-                    super.put( element, newData );
+                        // Extract the position
+                        Vector4f pos = new Vector4f(
+                            Float.intBitsToFloat( vertexData[start] ),
+                            Float.intBitsToFloat( vertexData[start + 1] ),
+                            Float.intBitsToFloat( vertexData[start + 2] ),
+                            1
+                        );
 
+                        // Transform the position
+                        transform.transform( pos );
 
-                    before[vertexIndex] = vec;
-                    after[vertexIndex] = newVec;
-                    break;
+                        // Insert the position
+                        vertexData[start] = Float.floatToRawIntBits( pos.x );
+                        vertexData[start + 1] = Float.floatToRawIntBits( pos.y );
+                        vertexData[start + 2] = Float.floatToRawIntBits( pos.z );
+                    }
                 }
-                case NORMAL:
-                {
-                    Vector3f vec = new Vector3f( data );
-                    normalMatrix.transform( vec );
-
-                    float[] newData = new float[4];
-                    vec.get( newData );
-                    super.put( element, newData );
-                    break;
-                }
-                default:
-                    super.put( element, data );
-                    break;
-            }
-
-            elementIndex++;
-            if( elementIndex == getVertexFormat().getElementCount() )
-            {
-                vertexIndex++;
-                elementIndex = 0;
             }
+            offset += element.getSize();
         }
-
-        public boolean areNormalsInverted()
-        {
-            Vector3f temp1 = new Vector3f(), temp2 = new Vector3f();
-            Vector3f crossBefore = new Vector3f(), crossAfter = new Vector3f();
-
-            // Determine what cross product we expect to have
-            temp1.sub( before[1], before[0] );
-            temp2.sub( before[1], before[2] );
-            crossBefore.cross( temp1, temp2 );
-            normalMatrix.transform( crossBefore );
-
-            // And determine what cross product we actually have
-            temp1.sub( after[1], after[0] );
-            temp2.sub( after[1], after[2] );
-            crossAfter.cross( temp1, temp2 );
-
-            // If the angle between expected and actual cross product is greater than
-            // pi/2 radians then we will need to reorder our quads.
-            return Math.abs( crossBefore.angle( crossAfter ) ) >= Math.PI / 2;
-        }
-    }
-
-    /**
-     * A vertex consumer which is capable of building {@link BakedQuad}s.
-     *
-     * Equivalent to {@link net.minecraftforge.client.model.pipeline.UnpackedBakedQuad.Builder} but more memory
-     * efficient.
-     *
-     * This also provides the ability to swap vertices through {@link #swap(int, int)} to allow reordering.
-     */
-    private static class BakedQuadBuilder implements IVertexConsumer
-    {
-        private final VertexFormat format;
-
-        private final int[] vertexData;
-        private int vertexIndex = 0, elementIndex = 0;
-
-        private EnumFacing orientation;
-        private int quadTint;
-        private boolean diffuse;
-        private TextureAtlasSprite texture;
-
-        private BakedQuadBuilder( VertexFormat format )
-        {
-            this.format = format;
-            this.vertexData = new int[format.getSize()];
-        }
-
-        @Nonnull
-        @Override
-        public VertexFormat getVertexFormat()
-        {
-            return format;
-        }
-
-        @Override
-        public void setQuadTint( int tint )
-        {
-            this.quadTint = tint;
-        }
-
-        @Override
-        public void setQuadOrientation( @Nonnull EnumFacing orientation )
-        {
-            this.orientation = orientation;
-        }
-
-        @Override
-        public void setApplyDiffuseLighting( boolean diffuse )
-        {
-            this.diffuse = diffuse;
-        }
-
-        @Override
-        public void setTexture( @Nonnull TextureAtlasSprite texture )
-        {
-            this.texture = texture;
-        }
-
-        @Override
-        public void put( int element, @Nonnull float... data )
-        {
-            LightUtil.pack( data, vertexData, format, vertexIndex, element );
-
-            elementIndex++;
-            if( elementIndex == getVertexFormat().getElementCount() )
-            {
-                vertexIndex++;
-                elementIndex = 0;
-            }
-        }
-
-        public void swap( int a, int b )
-        {
-            int length = vertexData.length / 4;
-            for( int i = 0; i < length; i++ )
-            {
-                int temp = vertexData[a * length + i];
-                vertexData[a * length + i] = vertexData[b * length + i];
-                vertexData[b * length + i] = temp;
-            }
-        }
-
-        public BakedQuad build()
-        {
-            if( elementIndex != 0 || vertexIndex != 4 )
-            {
-                throw new IllegalStateException( "Got an unexpected number of elements/vertices" );
-            }
-            if( texture == null )
-            {
-                throw new IllegalStateException( "Texture has not been set" );
-            }
-
-            return new BakedQuad( vertexData, quadTint, orientation, texture, diffuse, format );
-        }
+        return copy;
     }
 }

src/main/java/dan200/computercraft/client/render/PrintoutRenderer.java

@@ -6,23 +6,25 @@
 
 package dan200.computercraft.client.render;
 
+import com.mojang.blaze3d.platform.GlStateManager;
+import com.mojang.blaze3d.platform.GlStateManager.DestFactor;
+import com.mojang.blaze3d.platform.GlStateManager.SourceFactor;
 import dan200.computercraft.client.gui.FixedWidthFontRenderer;
 import dan200.computercraft.core.terminal.TextBuffer;
 import dan200.computercraft.shared.util.Palette;
-import net.minecraft.client.Minecraft;
-import net.minecraft.client.renderer.BufferBuilder;
-import net.minecraft.client.renderer.GlStateManager;
-import net.minecraft.client.renderer.Tessellator;
-import net.minecraft.client.renderer.vertex.DefaultVertexFormats;
-import net.minecraft.util.ResourceLocation;
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.client.render.BufferBuilder;
+import net.minecraft.client.render.Tessellator;
+import net.minecraft.client.render.VertexFormats;
+import net.minecraft.util.Identifier;
 import org.lwjgl.opengl.GL11;
 
 import static dan200.computercraft.client.gui.FixedWidthFontRenderer.FONT_HEIGHT;
 import static dan200.computercraft.shared.media.items.ItemPrintout.LINES_PER_PAGE;
 
-public class PrintoutRenderer
+public final class PrintoutRenderer
 {
-    private static final ResourceLocation BG = new ResourceLocation( "computercraft", "textures/gui/printout.png" );
+    private static final Identifier BG = new Identifier( "computercraft", "textures/gui/printout.png" );
     private static final double BG_SIZE = 256.0;
 
     /**
@@ -58,6 +60,8 @@ public class PrintoutRenderer
     private static final int COVER_Y = Y_SIZE;
     private static final int COVER_X = X_SIZE + 4 * X_FOLD_SIZE;
 
+    private PrintoutRenderer() {}
+
     public static void drawText( int x, int y, int start, TextBuffer[] text, TextBuffer[] colours )
     {
         FixedWidthFontRenderer fontRenderer = FixedWidthFontRenderer.instance();
@@ -70,9 +74,10 @@ public class PrintoutRenderer
 
     public static void drawText( int x, int y, int start, String[] text, String[] colours )
     {
-        GlStateManager.color( 1.0f, 1.0f, 1.0f, 1.0f );
+        GlStateManager.color4f( 1.0f, 1.0f, 1.0f, 1.0f );
         GlStateManager.enableBlend();
-        GlStateManager.enableTexture2D();
+        GlStateManager.enableTexture();
+        GlStateManager.blendFuncSeparate( SourceFactor.SRC_ALPHA, DestFactor.ONE_MINUS_SRC_ALPHA, SourceFactor.ONE, DestFactor.ZERO );
 
         FixedWidthFontRenderer fontRenderer = FixedWidthFontRenderer.instance();
 
@@ -84,15 +89,16 @@ public class PrintoutRenderer
 
     public static void drawBorder( double x, double y, double z, int page, int pages, boolean isBook )
     {
-        GlStateManager.color( 1.0f, 1.0f, 1.0f, 1.0f );
+        GlStateManager.color4f( 1.0f, 1.0f, 1.0f, 1.0f );
         GlStateManager.enableBlend();
-        GlStateManager.enableTexture2D();
+        GlStateManager.enableTexture();
+        GlStateManager.blendFuncSeparate( SourceFactor.SRC_ALPHA, DestFactor.ONE_MINUS_SRC_ALPHA, SourceFactor.ONE, DestFactor.ZERO );
 
-        Minecraft.getMinecraft().getTextureManager().bindTexture( BG );
+        MinecraftClient.getInstance().getTextureManager().bindTexture( BG );
 
         Tessellator tessellator = Tessellator.getInstance();
-        BufferBuilder buffer = tessellator.getBuffer();
-        buffer.begin( GL11.GL_QUADS, DefaultVertexFormats.POSITION_TEX );
+        BufferBuilder buffer = tessellator.getBufferBuilder();
+        buffer.begin( GL11.GL_QUADS, VertexFormats.POSITION_UV );
 
         int leftPages = page;
         int rightPages = pages - page - 1;
@@ -153,18 +159,18 @@ public class PrintoutRenderer
 
     private static void drawTexture( BufferBuilder buffer, double x, double y, double z, double u, double v, double width, double height )
     {
-        buffer.pos( x, y + height, z ).tex( u / BG_SIZE, (v + height) / BG_SIZE ).endVertex();
-        buffer.pos( x + width, y + height, z ).tex( (u + width) / BG_SIZE, (v + height) / BG_SIZE ).endVertex();
-        buffer.pos( x + width, y, z ).tex( (u + width) / BG_SIZE, v / BG_SIZE ).endVertex();
-        buffer.pos( x, y, z ).tex( u / BG_SIZE, v / BG_SIZE ).endVertex();
+        buffer.vertex( x, y + height, z ).texture( u / BG_SIZE, (v + height) / BG_SIZE ).next();
+        buffer.vertex( x + width, y + height, z ).texture( (u + width) / BG_SIZE, (v + height) / BG_SIZE ).next();
+        buffer.vertex( x + width, y, z ).texture( (u + width) / BG_SIZE, v / BG_SIZE ).next();
+        buffer.vertex( x, y, z ).texture( u / BG_SIZE, v / BG_SIZE ).next();
     }
 
     private static void drawTexture( BufferBuilder buffer, double x, double y, double z, double width, double height, double u, double v, double tWidth, double tHeight )
     {
-        buffer.pos( x, y + height, z ).tex( u / BG_SIZE, (v + tHeight) / BG_SIZE ).endVertex();
-        buffer.pos( x + width, y + height, z ).tex( (u + tWidth) / BG_SIZE, (v + tHeight) / BG_SIZE ).endVertex();
-        buffer.pos( x + width, y, z ).tex( (u + tWidth) / BG_SIZE, v / BG_SIZE ).endVertex();
-        buffer.pos( x, y, z ).tex( u / BG_SIZE, v / BG_SIZE ).endVertex();
+        buffer.vertex( x, y + height, z ).texture( u / BG_SIZE, (v + tHeight) / BG_SIZE ).next();
+        buffer.vertex( x + width, y + height, z ).texture( (u + tWidth) / BG_SIZE, (v + tHeight) / BG_SIZE ).next();
+        buffer.vertex( x + width, y, z ).texture( (u + tWidth) / BG_SIZE, v / BG_SIZE ).next();
+        buffer.vertex( x, y, z ).texture( u / BG_SIZE, v / BG_SIZE ).next();
     }
 
     public static double offsetAt( int page )

src/main/java/dan200/computercraft/client/render/RenderOverlayCable.java

@@ -6,210 +6,77 @@
 
 package dan200.computercraft.client.render;
 
+import com.mojang.blaze3d.platform.GlStateManager;
 import dan200.computercraft.ComputerCraft;
-import dan200.computercraft.shared.peripheral.PeripheralType;
 import dan200.computercraft.shared.peripheral.modem.wired.BlockCable;
-import dan200.computercraft.shared.peripheral.modem.wired.CableBounds;
+import dan200.computercraft.shared.peripheral.modem.wired.CableShapes;
 import dan200.computercraft.shared.util.WorldUtil;
-import net.minecraft.block.state.IBlockState;
-import net.minecraft.client.renderer.BufferBuilder;
-import net.minecraft.client.renderer.GlStateManager;
-import net.minecraft.client.renderer.RenderGlobal;
-import net.minecraft.client.renderer.Tessellator;
-import net.minecraft.client.renderer.vertex.DefaultVertexFormats;
-import net.minecraft.entity.player.EntityPlayer;
-import net.minecraft.util.EnumFacing;
+import net.minecraft.block.BlockState;
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.client.render.WorldRenderer;
+import net.minecraft.entity.Entity;
+import net.minecraft.entity.player.PlayerEntity;
+import net.minecraft.util.hit.BlockHitResult;
+import net.minecraft.util.hit.HitResult;
 import net.minecraft.util.math.BlockPos;
-import net.minecraft.util.math.RayTraceResult;
+import net.minecraft.util.shape.VoxelShape;
 import net.minecraft.world.World;
-import net.minecraftforge.client.event.DrawBlockHighlightEvent;
-import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
 import org.lwjgl.opengl.GL11;
 
-public class RenderOverlayCable
+public final class RenderOverlayCable
 {
-    private static final float EXPAND = 0.002f;
-    private static final double MIN = CableBounds.MIN - EXPAND;
-    private static final double MAX = CableBounds.MAX + EXPAND;
-
-    @SubscribeEvent
-    public void drawHighlight( DrawBlockHighlightEvent event )
+    private RenderOverlayCable()
     {
-        if( event.getTarget().typeOfHit != RayTraceResult.Type.BLOCK ) return;
+    }
 
-        BlockPos pos = event.getTarget().getBlockPos();
-        World world = event.getPlayer().getEntityWorld();
+    /**
+     * Draw an outline for a specific part of a cable "Multipart".
+     *
+     * @see WorldRenderer#drawHighlightedBlockOutline(Entity, HitResult, int, float)
+     */
+    // TODO @SubscribeEvent
+    public static void drawHighlight()
+    {
+        MinecraftClient mc = MinecraftClient.getInstance();
+        if( mc.hitResult == null || mc.hitResult.getType() != HitResult.Type.BLOCK ) return;
 
-        IBlockState state = world.getBlockState( pos );
-        if( state.getBlock() != ComputerCraft.Blocks.cable ) return;
+        BlockPos pos = ((BlockHitResult) mc.hitResult).getBlockPos();
+        World world = mc.world;
 
-        state = state.getActualState( world, pos );
+        BlockState state = world.getBlockState( pos );
 
-        event.setCanceled( true );
-        PeripheralType type = ComputerCraft.Blocks.cable.getPeripheralType( state );
+        // We only care about instances with both cable and modem.
+        if( state.getBlock() != ComputerCraft.Blocks.cable || state.get( BlockCable.MODEM ).getFacing() == null || !state.get( BlockCable.CABLE ) )
+        {
+            return;
+        }
+
+        PlayerEntity player = mc.player;
+        float partialTicks = mc.getTickDelta();
 
         GlStateManager.enableBlend();
-        GlStateManager.tryBlendFuncSeparate( GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA, 1, 0 );
-        GlStateManager.color( 0.0f, 0.0f, 0.0f, 0.4f );
-        GL11.glLineWidth( 2.0F );
-        GlStateManager.disableTexture2D();
+        GlStateManager.blendFuncSeparate( GlStateManager.SourceFactor.SRC_ALPHA, GlStateManager.DestFactor.ONE_MINUS_SRC_ALPHA, GlStateManager.SourceFactor.ONE, GlStateManager.DestFactor.ZERO );
+        GlStateManager.lineWidth( Math.max( 2.5F, mc.window.getFramebufferWidth() / 1920.0F * 2.5F ) );
+        GlStateManager.disableTexture();
         GlStateManager.depthMask( false );
+        GlStateManager.matrixMode( GL11.GL_PROJECTION );
         GlStateManager.pushMatrix();
+        GlStateManager.scalef( 1.0F, 1.0F, 0.999F );
 
-        {
-            EntityPlayer player = event.getPlayer();
-            double x = player.lastTickPosX + (player.posX - player.lastTickPosX) * event.getPartialTicks();
-            double y = player.lastTickPosY + (player.posY - player.lastTickPosY) * event.getPartialTicks();
-            double z = player.lastTickPosZ + (player.posZ - player.lastTickPosZ) * event.getPartialTicks();
+        double x = player.prevX + (player.x - player.prevX) * partialTicks;
+        double y = player.prevY + (player.y - player.prevY) * partialTicks;
+        double z = player.prevZ + (player.z - player.prevZ) * partialTicks;
 
-            GlStateManager.translate( -x + pos.getX(), -y + pos.getY(), -z + pos.getZ() );
-        }
+        VoxelShape shape = WorldUtil.isVecInside( CableShapes.getModemShape( state ), mc.hitResult.getPos().subtract( pos.getX(), pos.getY(), pos.getZ() ) )
+            ? CableShapes.getModemShape( state )
+            : CableShapes.getCableShape( state );
 
-        if( type != PeripheralType.Cable && WorldUtil.isVecInsideInclusive( CableBounds.getModemBounds( state ), event.getTarget().hitVec.subtract( pos.getX(), pos.getY(), pos.getZ() ) ) )
-        {
-            RenderGlobal.drawSelectionBoundingBox( CableBounds.getModemBounds( state ), 0, 0, 0, 0.4f );
-        }
-        else
-        {
-            int flags = 0;
-
-            Tessellator tessellator = Tessellator.getInstance();
-            BufferBuilder buffer = tessellator.getBuffer();
-
-            for( EnumFacing facing : EnumFacing.VALUES )
-            {
-                if( BlockCable.doesConnectVisually( state, world, pos, facing ) )
-                {
-                    flags |= 1 << facing.ordinal();
-
-
-                    switch( facing.getAxis() )
-                    {
-                        case X:
-                        {
-                            double offset = facing == EnumFacing.WEST ? -EXPAND : 1 + EXPAND;
-                            double centre = facing == EnumFacing.WEST ? MIN : MAX;
-
-                            buffer.begin( GL11.GL_LINE_STRIP, DefaultVertexFormats.POSITION );
-                            buffer.pos( offset, MIN, MIN ).endVertex();
-                            buffer.pos( offset, MAX, MIN ).endVertex();
-                            buffer.pos( offset, MAX, MAX ).endVertex();
-                            buffer.pos( offset, MIN, MAX ).endVertex();
-                            buffer.pos( offset, MIN, MIN ).endVertex();
-                            tessellator.draw();
-
-                            buffer.begin( GL11.GL_LINES, DefaultVertexFormats.POSITION );
-                            buffer.pos( offset, MIN, MIN ).endVertex();
-                            buffer.pos( centre, MIN, MIN ).endVertex();
-                            buffer.pos( offset, MAX, MIN ).endVertex();
-                            buffer.pos( centre, MAX, MIN ).endVertex();
-                            buffer.pos( offset, MAX, MAX ).endVertex();
-                            buffer.pos( centre, MAX, MAX ).endVertex();
-                            buffer.pos( offset, MIN, MAX ).endVertex();
-                            buffer.pos( centre, MIN, MAX ).endVertex();
-                            tessellator.draw();
-                            break;
-                        }
-                        case Y:
-                        {
-                            double offset = facing == EnumFacing.DOWN ? -EXPAND : 1 + EXPAND;
-                            double centre = facing == EnumFacing.DOWN ? MIN : MAX;
-
-                            buffer.begin( GL11.GL_LINE_STRIP, DefaultVertexFormats.POSITION );
-                            buffer.pos( MIN, offset, MIN ).endVertex();
-                            buffer.pos( MAX, offset, MIN ).endVertex();
-                            buffer.pos( MAX, offset, MAX ).endVertex();
-                            buffer.pos( MIN, offset, MAX ).endVertex();
-                            buffer.pos( MIN, offset, MIN ).endVertex();
-                            tessellator.draw();
-
-                            buffer.begin( GL11.GL_LINES, DefaultVertexFormats.POSITION );
-                            buffer.pos( MIN, offset, MIN ).endVertex();
-                            buffer.pos( MIN, centre, MIN ).endVertex();
-                            buffer.pos( MAX, offset, MIN ).endVertex();
-                            buffer.pos( MAX, centre, MIN ).endVertex();
-                            buffer.pos( MAX, offset, MAX ).endVertex();
-                            buffer.pos( MAX, centre, MAX ).endVertex();
-                            buffer.pos( MIN, offset, MAX ).endVertex();
-                            buffer.pos( MIN, centre, MAX ).endVertex();
-                            tessellator.draw();
-                            break;
-                        }
-                        case Z:
-                        {
-                            double offset = facing == EnumFacing.NORTH ? -EXPAND : 1 + EXPAND;
-                            double centre = facing == EnumFacing.NORTH ? MIN : MAX;
-
-                            buffer.begin( GL11.GL_LINE_STRIP, DefaultVertexFormats.POSITION );
-                            buffer.pos( MIN, MIN, offset ).endVertex();
-                            buffer.pos( MAX, MIN, offset ).endVertex();
-                            buffer.pos( MAX, MAX, offset ).endVertex();
-                            buffer.pos( MIN, MAX, offset ).endVertex();
-                            buffer.pos( MIN, MIN, offset ).endVertex();
-                            tessellator.draw();
-
-                            buffer.begin( GL11.GL_LINES, DefaultVertexFormats.POSITION );
-                            buffer.pos( MIN, MIN, offset ).endVertex();
-                            buffer.pos( MIN, MIN, centre ).endVertex();
-                            buffer.pos( MAX, MIN, offset ).endVertex();
-                            buffer.pos( MAX, MIN, centre ).endVertex();
-                            buffer.pos( MAX, MAX, offset ).endVertex();
-                            buffer.pos( MAX, MAX, centre ).endVertex();
-                            buffer.pos( MIN, MAX, offset ).endVertex();
-                            buffer.pos( MIN, MAX, centre ).endVertex();
-                            tessellator.draw();
-                            break;
-                        }
-                    }
-                }
-            }
-
-            buffer.begin( GL11.GL_LINES, DefaultVertexFormats.POSITION );
-
-            draw( buffer, flags, EnumFacing.WEST, EnumFacing.DOWN, EnumFacing.Axis.Z );
-            draw( buffer, flags, EnumFacing.WEST, EnumFacing.UP, EnumFacing.Axis.Z );
-            draw( buffer, flags, EnumFacing.EAST, EnumFacing.DOWN, EnumFacing.Axis.Z );
-            draw( buffer, flags, EnumFacing.EAST, EnumFacing.UP, EnumFacing.Axis.Z );
-
-            draw( buffer, flags, EnumFacing.WEST, EnumFacing.NORTH, EnumFacing.Axis.Y );
-            draw( buffer, flags, EnumFacing.WEST, EnumFacing.SOUTH, EnumFacing.Axis.Y );
-            draw( buffer, flags, EnumFacing.EAST, EnumFacing.NORTH, EnumFacing.Axis.Y );
-            draw( buffer, flags, EnumFacing.EAST, EnumFacing.SOUTH, EnumFacing.Axis.Y );
-
-            draw( buffer, flags, EnumFacing.DOWN, EnumFacing.NORTH, EnumFacing.Axis.X );
-            draw( buffer, flags, EnumFacing.DOWN, EnumFacing.SOUTH, EnumFacing.Axis.X );
-            draw( buffer, flags, EnumFacing.UP, EnumFacing.NORTH, EnumFacing.Axis.X );
-            draw( buffer, flags, EnumFacing.UP, EnumFacing.SOUTH, EnumFacing.Axis.X );
-
-            tessellator.draw();
-        }
+        WorldRenderer.drawShapeOutline( shape, pos.getX() - x, pos.getY() - y, pos.getZ() - z, 0.0F, 0.0F, 0.0F, 0.4F );
 
         GlStateManager.popMatrix();
+        GlStateManager.matrixMode( GL11.GL_MODELVIEW );
         GlStateManager.depthMask( true );
-        GlStateManager.enableTexture2D();
+        GlStateManager.enableTexture();
         GlStateManager.disableBlend();
     }
-
-    private static void draw( BufferBuilder buffer, int flags, EnumFacing a, EnumFacing b, EnumFacing.Axis other )
-    {
-        if( ((flags >> a.ordinal()) & 1) != ((flags >> b.ordinal()) & 1) ) return;
-
-        double offA = a.getAxisDirection() == EnumFacing.AxisDirection.NEGATIVE ? MIN : MAX;
-        double offB = b.getAxisDirection() == EnumFacing.AxisDirection.NEGATIVE ? MIN : MAX;
-        switch( other )
-        {
-            case X:
-                buffer.pos( MIN, offA, offB ).endVertex();
-                buffer.pos( MAX, offA, offB ).endVertex();
-                break;
-            case Y:
-                buffer.pos( offA, MIN, offB ).endVertex();
-                buffer.pos( offA, MAX, offB ).endVertex();
-                break;
-            case Z:
-                buffer.pos( offA, offB, MIN ).endVertex();
-                buffer.pos( offA, offB, MAX ).endVertex();
-                break;
-        }
-    }
 }

src/main/java/dan200/computercraft/client/render/TileEntityCableRenderer.java

@@ -6,121 +6,104 @@
 
 package dan200.computercraft.client.render;
 
+import com.mojang.blaze3d.platform.GlStateManager;
 import dan200.computercraft.ComputerCraft;
-import dan200.computercraft.shared.peripheral.PeripheralType;
 import dan200.computercraft.shared.peripheral.modem.wired.BlockCable;
-import dan200.computercraft.shared.peripheral.modem.wired.BlockCableModemVariant;
-import dan200.computercraft.shared.peripheral.modem.wired.CableBounds;
+import dan200.computercraft.shared.peripheral.modem.wired.CableModemVariant;
+import dan200.computercraft.shared.peripheral.modem.wired.CableShapes;
 import dan200.computercraft.shared.peripheral.modem.wired.TileCable;
 import dan200.computercraft.shared.util.WorldUtil;
 import net.minecraft.block.Block;
-import net.minecraft.block.state.IBlockState;
-import net.minecraft.client.Minecraft;
-import net.minecraft.client.renderer.BufferBuilder;
-import net.minecraft.client.renderer.GlStateManager;
-import net.minecraft.client.renderer.RenderGlobal;
-import net.minecraft.client.renderer.Tessellator;
-import net.minecraft.client.renderer.block.model.IBakedModel;
-import net.minecraft.client.renderer.texture.TextureAtlasSprite;
-import net.minecraft.client.renderer.tileentity.TileEntitySpecialRenderer;
-import net.minecraft.client.renderer.vertex.DefaultVertexFormats;
-import net.minecraft.util.BlockRenderLayer;
+import net.minecraft.block.BlockState;
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.client.render.BufferBuilder;
+import net.minecraft.client.render.Tessellator;
+import net.minecraft.client.render.VertexFormats;
+import net.minecraft.client.render.WorldRenderer;
+import net.minecraft.client.render.block.entity.BlockEntityRenderer;
+import net.minecraft.client.render.model.BakedModel;
+import net.minecraft.client.texture.Sprite;
+import net.minecraft.util.hit.BlockHitResult;
+import net.minecraft.util.hit.HitResult;
 import net.minecraft.util.math.BlockPos;
-import net.minecraft.util.math.RayTraceResult;
 import net.minecraft.world.World;
-import net.minecraftforge.client.ForgeHooksClient;
-import net.minecraftforge.client.MinecraftForgeClient;
 import org.lwjgl.opengl.GL11;
 
 import javax.annotation.Nonnull;
+import java.util.Random;
 
 /**
  * Render breaking animation only over part of a {@link TileCable}.
  */
-public class TileEntityCableRenderer extends TileEntitySpecialRenderer<TileCable>
+public class TileEntityCableRenderer extends BlockEntityRenderer<TileCable>
 {
+    private static final Random random = new Random();
+
     @Override
-    public void render( @Nonnull TileCable te, double x, double y, double z, float partialTicks, int destroyStage, float alpha )
+    public void render( @Nonnull TileCable te, double x, double y, double z, float partialTicks, int destroyStage )
     {
         if( destroyStage < 0 ) return;
 
         BlockPos pos = te.getPos();
 
-        Minecraft mc = Minecraft.getMinecraft();
+        MinecraftClient mc = MinecraftClient.getInstance();
 
-        RayTraceResult hit = mc.objectMouseOver;
-        if( hit == null || !hit.getBlockPos().equals( pos ) ) return;
-
-        if( MinecraftForgeClient.getRenderPass() != 0 ) return;
+        HitResult hit = mc.hitResult;
+        if( !(hit instanceof BlockHitResult) || !((BlockHitResult) hit).getBlockPos().equals( pos ) ) return;
 
         World world = te.getWorld();
-        IBlockState state = world.getBlockState( pos );
+        BlockState state = te.getCachedState();
         Block block = state.getBlock();
         if( block != ComputerCraft.Blocks.cable ) return;
 
-        state = state.getActualState( world, pos );
-        if( te.getPeripheralType() != PeripheralType.Cable && WorldUtil.isVecInsideInclusive( CableBounds.getModemBounds( state ), hit.hitVec.subtract( pos.getX(), pos.getY(), pos.getZ() ) ) )
-        {
-            state = block.getDefaultState().withProperty( BlockCable.Properties.MODEM, state.getValue( BlockCable.Properties.MODEM ) );
-        }
-        else
-        {
-            state = state.withProperty( BlockCable.Properties.MODEM, BlockCableModemVariant.None );
-        }
+        state = WorldUtil.isVecInside( CableShapes.getModemShape( state ), hit.getPos().subtract( pos.getX(), pos.getY(), pos.getZ() ) )
+            ? block.getDefaultState().with( BlockCable.MODEM, state.get( BlockCable.MODEM ) )
+            : state.with( BlockCable.MODEM, CableModemVariant.None );
 
-        IBakedModel model = mc.getBlockRendererDispatcher().getModelForState( state );
-        if( model == null ) return;
+        BakedModel model = mc.getBlockRenderManager().getModel( state );
 
         preRenderDamagedBlocks();
 
-        BufferBuilder buffer = Tessellator.getInstance().getBuffer();
-        buffer.begin( GL11.GL_QUADS, DefaultVertexFormats.BLOCK );
-        buffer.setTranslation( x - pos.getX(), y - pos.getY(), z - pos.getZ() );
-        buffer.noColor();
-
-        ForgeHooksClient.setRenderLayer( block.getRenderLayer() );
+        BufferBuilder buffer = Tessellator.getInstance().getBufferBuilder();
+        buffer.begin( GL11.GL_QUADS, VertexFormats.POSITION_COLOR_UV_LMAP );
+        buffer.setOffset( x - pos.getX(), y - pos.getY(), z - pos.getZ() );
+        buffer.disableColor();
 
         // See BlockRendererDispatcher#renderBlockDamage
-        TextureAtlasSprite breakingTexture = mc.getTextureMapBlocks().getAtlasSprite( "minecraft:blocks/destroy_stage_" + destroyStage );
-        Minecraft.getMinecraft().getBlockRendererDispatcher().getBlockModelRenderer().renderModel(
-            world,
-            ForgeHooksClient.getDamageModel( model, breakingTexture, state, world, pos ),
-            state, pos, buffer, true
-        );
+        Sprite breakingTexture = mc.getSpriteAtlas().getSprite( DESTROY_STAGE_TEXTURES[destroyStage] );
+        mc.getBlockRenderManager().tesselateDamage( state, pos, breakingTexture, world );
 
-        ForgeHooksClient.setRenderLayer( BlockRenderLayer.SOLID );
-
-        buffer.setTranslation( 0, 0, 0 );
+        buffer.setOffset( 0, 0, 0 );
         Tessellator.getInstance().draw();
 
         postRenderDamagedBlocks();
     }
 
     /**
-     * @see RenderGlobal#preRenderDamagedBlocks()
+     * @see WorldRenderer#preRenderDamagedBlocks()
      */
     private void preRenderDamagedBlocks()
     {
         GlStateManager.disableLighting();
 
         GlStateManager.enableBlend();
-        GlStateManager.tryBlendFuncSeparate( GlStateManager.SourceFactor.DST_COLOR, GlStateManager.DestFactor.SRC_COLOR, GlStateManager.SourceFactor.ONE, GlStateManager.DestFactor.ZERO );
+        GlStateManager.blendFuncSeparate( GlStateManager.SourceFactor.DST_COLOR, GlStateManager.DestFactor.SRC_COLOR, GlStateManager.SourceFactor.ONE, GlStateManager.DestFactor.ZERO );
         GlStateManager.enableBlend();
-        GlStateManager.color( 1.0F, 1.0F, 1.0F, 0.5F );
-        GlStateManager.doPolygonOffset( -3.0F, -3.0F );
+        GlStateManager.color4f( 1.0F, 1.0F, 1.0F, 0.5F );
+        GlStateManager.polygonOffset( -3.0F, -3.0F );
         GlStateManager.enablePolygonOffset();
         GlStateManager.alphaFunc( 516, 0.1F );
-        GlStateManager.enableAlpha();
+        GlStateManager.enableAlphaTest();
         GlStateManager.pushMatrix();
     }
 
     /**
-     * @see RenderGlobal#postRenderDamagedBlocks()
+     * @see WorldRenderer#postRenderDamagedBlocks()
      */
     private void postRenderDamagedBlocks()
     {
-        GlStateManager.disableAlpha();
-        GlStateManager.doPolygonOffset( 0.0F, 0.0F );
+        GlStateManager.disableAlphaTest();
+        GlStateManager.polygonOffset( 0.0F, 0.0F );
         GlStateManager.disablePolygonOffset();
         GlStateManager.disablePolygonOffset();
         GlStateManager.depthMask( true );

src/main/java/dan200/computercraft/client/render/TileEntityMonitorRenderer.java

@@ -6,6 +6,8 @@
 
 package dan200.computercraft.client.render;
 
+import com.mojang.blaze3d.platform.GLX;
+import com.mojang.blaze3d.platform.GlStateManager;
 import dan200.computercraft.client.FrameInfo;
 import dan200.computercraft.client.gui.FixedWidthFontRenderer;
 import dan200.computercraft.core.terminal.Terminal;
@@ -15,21 +17,19 @@ import dan200.computercraft.shared.peripheral.monitor.TileMonitor;
 import dan200.computercraft.shared.util.Colour;
 import dan200.computercraft.shared.util.DirectionUtil;
 import dan200.computercraft.shared.util.Palette;
-import net.minecraft.client.Minecraft;
-import net.minecraft.client.renderer.BufferBuilder;
-import net.minecraft.client.renderer.GlStateManager;
-import net.minecraft.client.renderer.OpenGlHelper;
-import net.minecraft.client.renderer.Tessellator;
-import net.minecraft.client.renderer.tileentity.TileEntitySpecialRenderer;
-import net.minecraft.client.renderer.vertex.DefaultVertexFormats;
-import net.minecraft.util.EnumFacing;
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.client.render.BufferBuilder;
+import net.minecraft.client.render.Tessellator;
+import net.minecraft.client.render.VertexFormats;
+import net.minecraft.client.render.block.entity.BlockEntityRenderer;
 import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.Direction;
 import org.lwjgl.opengl.GL11;
 
-public class TileEntityMonitorRenderer extends TileEntitySpecialRenderer<TileMonitor>
+public class TileEntityMonitorRenderer extends BlockEntityRenderer<TileMonitor>
 {
     @Override
-    public void render( TileMonitor tileEntity, double posX, double posY, double posZ, float f, int i, float f2 )
+    public void render( TileMonitor tileEntity, double posX, double posY, double posZ, float f, int i )
     {
         if( tileEntity != null )
         {
@@ -37,7 +37,7 @@ public class TileEntityMonitorRenderer extends TileEntitySpecialRenderer<TileMon
         }
     }
 
-    private void renderMonitorAt( TileMonitor monitor, double posX, double posY, double posZ, float f, int i )
+    private static void renderMonitorAt( TileMonitor monitor, double posX, double posY, double posZ, float f, int i )
     {
         // Render from the origin monitor
         ClientMonitor originTerminal = monitor.getClientMonitor();
@@ -49,7 +49,7 @@ public class TileEntityMonitorRenderer extends TileEntitySpecialRenderer<TileMon
         // Ensure each monitor terminal is rendered only once. We allow rendering a specific tile
         // multiple times in a single frame to ensure compatibility with shaders which may run a
         // pass multiple times.
-        long renderFrame = FrameInfo.instance().getRenderFrame();
+        long renderFrame = FrameInfo.getRenderFrame();
         if( originTerminal.lastRenderFrame == renderFrame && !monitorPos.equals( originTerminal.lastRenderPos ) )
         {
             return;
@@ -64,39 +64,39 @@ public class TileEntityMonitorRenderer extends TileEntitySpecialRenderer<TileMon
         posZ += originPos.getZ() - monitorPos.getZ();
 
         // Determine orientation
-        EnumFacing dir = origin.getDirection();
-        EnumFacing front = origin.getFront();
-        float yaw = dir.getHorizontalAngle();
+        Direction dir = origin.getDirection();
+        Direction front = origin.getFront();
+        float yaw = dir.asRotation();
         float pitch = DirectionUtil.toPitchAngle( front );
 
         GlStateManager.pushMatrix();
         try
         {
             // Setup initial transform
-            GlStateManager.translate( posX + 0.5, posY + 0.5, posZ + 0.5 );
-            GlStateManager.rotate( -yaw, 0.0f, 1.0f, 0.0f );
-            GlStateManager.rotate( pitch, 1.0f, 0.0f, 0.0f );
-            GlStateManager.translate(
+            GlStateManager.translated( posX + 0.5, posY + 0.5, posZ + 0.5 );
+            GlStateManager.rotatef( -yaw, 0.0f, 1.0f, 0.0f );
+            GlStateManager.rotatef( pitch, 1.0f, 0.0f, 0.0f );
+            GlStateManager.translated(
                 -0.5 + TileMonitor.RENDER_BORDER + TileMonitor.RENDER_MARGIN,
-                (origin.getHeight() - 0.5) - (TileMonitor.RENDER_BORDER + TileMonitor.RENDER_MARGIN),
+                origin.getHeight() - 0.5 - (TileMonitor.RENDER_BORDER + TileMonitor.RENDER_MARGIN) + 0,
                 0.5
             );
             double xSize = origin.getWidth() - 2.0 * (TileMonitor.RENDER_MARGIN + TileMonitor.RENDER_BORDER);
             double ySize = origin.getHeight() - 2.0 * (TileMonitor.RENDER_MARGIN + TileMonitor.RENDER_BORDER);
 
             // Get renderers
-            Minecraft mc = Minecraft.getMinecraft();
+            MinecraftClient mc = MinecraftClient.getInstance();
             Tessellator tessellator = Tessellator.getInstance();
-            BufferBuilder renderer = tessellator.getBuffer();
+            BufferBuilder renderer = tessellator.getBufferBuilder();
 
             // Get terminal
             boolean redraw = originTerminal.pollTerminalChanged();
 
             // Draw the contents
             GlStateManager.depthMask( false );
-            OpenGlHelper.setLightmapTextureCoords( OpenGlHelper.lightmapTexUnit, 0xFF, 0xFF );
+            GLX.glMultiTexCoord2f( GLX.GL_TEXTURE1, 0xFFFF, 0xFFFF );
             GlStateManager.disableLighting();
-            mc.entityRenderer.disableLightmap();
+            mc.gameRenderer.disableLightmap();
             try
             {
                 Terminal terminal = originTerminal.getTerminal();
@@ -124,14 +124,14 @@ public class TileEntityMonitorRenderer extends TileEntitySpecialRenderer<TileMon
                     {
                         double xScale = xSize / (width * FixedWidthFontRenderer.FONT_WIDTH);
                         double yScale = ySize / (height * FixedWidthFontRenderer.FONT_HEIGHT);
-                        GlStateManager.scale( xScale, -yScale, 1.0 );
+                        GlStateManager.scaled( xScale, -yScale, 1.0 );
 
                         // Draw background
                         mc.getTextureManager().bindTexture( FixedWidthFontRenderer.BACKGROUND );
                         if( redraw )
                         {
                             // Build background display list
-                            GlStateManager.glNewList( originTerminal.renderDisplayLists[0], GL11.GL_COMPILE );
+                            GlStateManager.newList( originTerminal.renderDisplayLists[0], GL11.GL_COMPILE );
                             try
                             {
                                 double marginXSize = TileMonitor.RENDER_MARGIN / xScale;
@@ -142,10 +142,10 @@ public class TileEntityMonitorRenderer extends TileEntitySpecialRenderer<TileMon
                                 GlStateManager.pushMatrix();
                                 try
                                 {
-                                    GlStateManager.scale( 1.0, marginSquash, 1.0 );
-                                    GlStateManager.translate( 0.0, -marginYSize / marginSquash, 0.0 );
+                                    GlStateManager.scaled( 1.0, marginSquash, 1.0 );
+                                    GlStateManager.translated( 0.0, -marginYSize / marginSquash, 0.0 );
                                     fontRenderer.drawStringBackgroundPart( 0, 0, terminal.getBackgroundColourLine( 0 ), marginXSize, marginXSize, greyscale, palette );
-                                    GlStateManager.translate( 0.0, (marginYSize + height * FixedWidthFontRenderer.FONT_HEIGHT) / marginSquash, 0.0 );
+                                    GlStateManager.translated( 0.0, (marginYSize + height * FixedWidthFontRenderer.FONT_HEIGHT) / marginSquash, 0.0 );
                                     fontRenderer.drawStringBackgroundPart( 0, 0, terminal.getBackgroundColourLine( height - 1 ), marginXSize, marginXSize, greyscale, palette );
                                 }
                                 finally
@@ -167,18 +167,18 @@ public class TileEntityMonitorRenderer extends TileEntitySpecialRenderer<TileMon
                             }
                             finally
                             {
-                                GlStateManager.glEndList();
+                                GlStateManager.endList();
                             }
                         }
                         GlStateManager.callList( originTerminal.renderDisplayLists[0] );
-                        GlStateManager.resetColor();
+                        GlStateManager.clearCurrentColor();
 
                         // Draw text
                         fontRenderer.bindFont();
                         if( redraw )
                         {
                             // Build text display list
-                            GlStateManager.glNewList( originTerminal.renderDisplayLists[1], GL11.GL_COMPILE );
+                            GlStateManager.newList( originTerminal.renderDisplayLists[1], GL11.GL_COMPILE );
                             try
                             {
                                 // Lines
@@ -195,18 +195,18 @@ public class TileEntityMonitorRenderer extends TileEntitySpecialRenderer<TileMon
                             }
                             finally
                             {
-                                GlStateManager.glEndList();
+                                GlStateManager.endList();
                             }
                         }
                         GlStateManager.callList( originTerminal.renderDisplayLists[1] );
-                        GlStateManager.resetColor();
+                        GlStateManager.clearCurrentColor();
 
                         // Draw cursor
                         fontRenderer.bindFont();
                         if( redraw )
                         {
                             // Build cursor display list
-                            GlStateManager.glNewList( originTerminal.renderDisplayLists[2], GL11.GL_COMPILE );
+                            GlStateManager.newList( originTerminal.renderDisplayLists[2], GL11.GL_COMPILE );
                             try
                             {
                                 // Cursor
@@ -227,13 +227,13 @@ public class TileEntityMonitorRenderer extends TileEntitySpecialRenderer<TileMon
                             }
                             finally
                             {
-                                GlStateManager.glEndList();
+                                GlStateManager.endList();
                             }
                         }
-                        if( FrameInfo.instance().getGlobalCursorBlink() )
+                        if( FrameInfo.getGlobalCursorBlink() )
                         {
                             GlStateManager.callList( originTerminal.renderDisplayLists[2] );
-                            GlStateManager.resetColor();
+                            GlStateManager.clearCurrentColor();
                         }
                     }
                     finally
@@ -251,18 +251,18 @@ public class TileEntityMonitorRenderer extends TileEntitySpecialRenderer<TileMon
                     final float g = colour.getG();
                     final float b = colour.getB();
 
-                    renderer.begin( GL11.GL_TRIANGLE_STRIP, DefaultVertexFormats.POSITION_TEX_COLOR );
-                    renderer.pos( -TileMonitor.RENDER_MARGIN, TileMonitor.RENDER_MARGIN, 0.0D ).tex( 0.0, 0.0 ).color( r, g, b, 1.0f ).endVertex();
-                    renderer.pos( -TileMonitor.RENDER_MARGIN, -ySize - TileMonitor.RENDER_MARGIN, 0.0 ).tex( 0.0, 1.0 ).color( r, g, b, 1.0f ).endVertex();
-                    renderer.pos( xSize + TileMonitor.RENDER_MARGIN, TileMonitor.RENDER_MARGIN, 0.0D ).tex( 1.0, 0.0 ).color( r, g, b, 1.0f ).endVertex();
-                    renderer.pos( xSize + TileMonitor.RENDER_MARGIN, -ySize - TileMonitor.RENDER_MARGIN, 0.0 ).tex( 1.0, 1.0 ).color( r, g, b, 1.0f ).endVertex();
+                    renderer.begin( GL11.GL_TRIANGLE_STRIP, VertexFormats.POSITION_UV_COLOR );
+                    renderer.vertex( -TileMonitor.RENDER_MARGIN, TileMonitor.RENDER_MARGIN, 0.0D ).texture( 0.0, 0.0 ).color( r, g, b, 1.0f ).next();
+                    renderer.vertex( -TileMonitor.RENDER_MARGIN, -ySize - TileMonitor.RENDER_MARGIN, 0.0 ).texture( 0.0, 1.0 ).color( r, g, b, 1.0f ).next();
+                    renderer.vertex( xSize + TileMonitor.RENDER_MARGIN, TileMonitor.RENDER_MARGIN, 0.0D ).texture( 1.0, 0.0 ).color( r, g, b, 1.0f ).next();
+                    renderer.vertex( xSize + TileMonitor.RENDER_MARGIN, -ySize - TileMonitor.RENDER_MARGIN, 0.0 ).texture( 1.0, 1.0 ).color( r, g, b, 1.0f ).next();
                     tessellator.draw();
                 }
             }
             finally
             {
                 GlStateManager.depthMask( true );
-                mc.entityRenderer.enableLightmap();
+                mc.gameRenderer.enableLightmap();
                 GlStateManager.enableLighting();
             }
 
@@ -271,11 +271,11 @@ public class TileEntityMonitorRenderer extends TileEntitySpecialRenderer<TileMon
             try
             {
                 mc.getTextureManager().bindTexture( FixedWidthFontRenderer.BACKGROUND );
-                renderer.begin( GL11.GL_TRIANGLE_STRIP, DefaultVertexFormats.POSITION );
-                renderer.pos( -TileMonitor.RENDER_MARGIN, TileMonitor.RENDER_MARGIN, 0.0 ).endVertex();
-                renderer.pos( -TileMonitor.RENDER_MARGIN, -ySize - TileMonitor.RENDER_MARGIN, 0.0 ).endVertex();
-                renderer.pos( xSize + TileMonitor.RENDER_MARGIN, TileMonitor.RENDER_MARGIN, 0.0 ).endVertex();
-                renderer.pos( xSize + TileMonitor.RENDER_MARGIN, -ySize - TileMonitor.RENDER_MARGIN, 0.0 ).endVertex();
+                renderer.begin( GL11.GL_TRIANGLE_STRIP, VertexFormats.POSITION );
+                renderer.vertex( -TileMonitor.RENDER_MARGIN, TileMonitor.RENDER_MARGIN, 0.0 ).next();
+                renderer.vertex( -TileMonitor.RENDER_MARGIN, -ySize - TileMonitor.RENDER_MARGIN, 0.0 ).next();
+                renderer.vertex( xSize + TileMonitor.RENDER_MARGIN, TileMonitor.RENDER_MARGIN, 0.0 ).next();
+                renderer.vertex( xSize + TileMonitor.RENDER_MARGIN, -ySize - TileMonitor.RENDER_MARGIN, 0.0 ).next();
                 tessellator.draw();
             }
             finally
@@ -285,7 +285,7 @@ public class TileEntityMonitorRenderer extends TileEntitySpecialRenderer<TileMon
         }
         finally
         {
-            GlStateManager.color( 1.0f, 1.0f, 1.0f, 1.0f );
+            GlStateManager.color4f( 1.0f, 1.0f, 1.0f, 1.0f );
             GlStateManager.popMatrix();
         }
     }

src/main/java/dan200/computercraft/client/render/TileEntityTurtleRenderer.java

@@ -6,54 +6,53 @@
 
 package dan200.computercraft.client.render;
 
+import com.mojang.blaze3d.platform.GlStateManager;
 import dan200.computercraft.api.turtle.ITurtleUpgrade;
 import dan200.computercraft.api.turtle.TurtleSide;
 import dan200.computercraft.shared.computer.core.ComputerFamily;
 import dan200.computercraft.shared.turtle.blocks.TileTurtle;
+import dan200.computercraft.shared.util.DirectionUtil;
 import dan200.computercraft.shared.util.Holiday;
 import dan200.computercraft.shared.util.HolidayUtil;
-import net.minecraft.block.state.IBlockState;
-import net.minecraft.client.Minecraft;
-import net.minecraft.client.gui.FontRenderer;
-import net.minecraft.client.renderer.BufferBuilder;
-import net.minecraft.client.renderer.GlStateManager;
-import net.minecraft.client.renderer.Tessellator;
-import net.minecraft.client.renderer.block.model.BakedQuad;
-import net.minecraft.client.renderer.block.model.IBakedModel;
-import net.minecraft.client.renderer.block.model.ModelManager;
-import net.minecraft.client.renderer.block.model.ModelResourceLocation;
-import net.minecraft.client.renderer.entity.RenderManager;
-import net.minecraft.client.renderer.texture.TextureMap;
-import net.minecraft.client.renderer.tileentity.TileEntitySpecialRenderer;
-import net.minecraft.client.renderer.vertex.DefaultVertexFormats;
-import net.minecraft.client.renderer.vertex.VertexFormat;
-import net.minecraft.util.EnumFacing;
-import net.minecraft.util.ResourceLocation;
-import net.minecraft.util.math.BlockPos;
-import net.minecraft.util.math.RayTraceResult;
+import net.minecraft.block.BlockState;
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.client.render.*;
+import net.minecraft.client.render.block.entity.BlockEntityRenderer;
+import net.minecraft.client.render.model.BakedModel;
+import net.minecraft.client.render.model.BakedModelManager;
+import net.minecraft.client.render.model.BakedQuad;
+import net.minecraft.client.texture.SpriteAtlasTexture;
+import net.minecraft.client.util.ModelIdentifier;
+import net.minecraft.util.Identifier;
+import net.minecraft.util.hit.BlockHitResult;
+import net.minecraft.util.math.Direction;
 import net.minecraft.util.math.Vec3d;
-import net.minecraftforge.client.ForgeHooksClient;
-import net.minecraftforge.client.model.pipeline.LightUtil;
+import net.minecraft.util.math.Vec3i;
 import org.apache.commons.lang3.tuple.Pair;
+import org.lwjgl.BufferUtils;
 import org.lwjgl.opengl.GL11;
 
 import javax.vecmath.Matrix4f;
+import java.nio.FloatBuffer;
 import java.util.List;
+import java.util.Random;
 
-public class TileEntityTurtleRenderer extends TileEntitySpecialRenderer<TileTurtle>
+public class TileEntityTurtleRenderer extends BlockEntityRenderer<TileTurtle>
 {
-    private static final ModelResourceLocation NORMAL_TURTLE_MODEL = new ModelResourceLocation( "computercraft:turtle", "inventory" );
-    private static final ModelResourceLocation ADVANCED_TURTLE_MODEL = new ModelResourceLocation( "computercraft:turtle_advanced", "inventory" );
-    private static final ModelResourceLocation COLOUR_TURTLE_MODEL = new ModelResourceLocation( "computercraft:turtle_white", "inventory" );
-    private static final ModelResourceLocation ELF_OVERLAY_MODEL = new ModelResourceLocation( "computercraft:turtle_elf_overlay", "inventory" );
+    private static final ModelIdentifier NORMAL_TURTLE_MODEL = new ModelIdentifier( "computercraft:turtle_normal", "inventory" );
+    private static final ModelIdentifier ADVANCED_TURTLE_MODEL = new ModelIdentifier( "computercraft:turtle_advanced", "inventory" );
+    private static final ModelIdentifier COLOUR_TURTLE_MODEL = new ModelIdentifier( "computercraft:turtle_colour", "inventory" );
+    private static final ModelIdentifier ELF_OVERLAY_MODEL = new ModelIdentifier( "computercraft:turtle_elf_overlay", "inventory" );
+
+    private static final FloatBuffer matrixBuf = BufferUtils.createFloatBuffer( 16 );
 
     @Override
-    public void render( TileTurtle tileEntity, double posX, double posY, double posZ, float f, int i, float f2 )
+    public void render( TileTurtle tileEntity, double posX, double posY, double posZ, float partialTicks, int breaking )
     {
-        if( tileEntity != null ) renderTurtleAt( tileEntity, posX, posY, posZ, f, i );
+        if( tileEntity != null ) renderTurtleAt( tileEntity, posX, posY, posZ, partialTicks );
     }
 
-    public static ModelResourceLocation getTurtleModel( ComputerFamily family, boolean coloured )
+    public static ModelIdentifier getTurtleModel( ComputerFamily family, boolean coloured )
     {
         switch( family )
         {
@@ -65,11 +64,11 @@ public class TileEntityTurtleRenderer extends TileEntitySpecialRenderer<TileTurt
         }
     }
 
-    public static ModelResourceLocation getTurtleOverlayModel( ComputerFamily family, ResourceLocation overlay, boolean christmas )
+    public static ModelIdentifier getTurtleOverlayModel( Identifier overlay, boolean christmas )
     {
         if( overlay != null )
         {
-            return new ModelResourceLocation( overlay, "inventory" );
+            return new ModelIdentifier( overlay, "inventory" );
         }
         else if( christmas )
         {
@@ -81,49 +80,48 @@ public class TileEntityTurtleRenderer extends TileEntitySpecialRenderer<TileTurt
         }
     }
 
-    private void renderTurtleAt( TileTurtle turtle, double posX, double posY, double posZ, float f, int i )
+    private void renderTurtleAt( TileTurtle turtle, double posX, double posY, double posZ, float partialTicks )
     {
-        IBlockState state = turtle.getWorld().getBlockState( turtle.getPos() );
+        // Render the label
+        String label = turtle.createProxy().getLabel();
+        if( label != null && renderManager.hitResult != null && renderManager.hitResult instanceof BlockHitResult && turtle.getPos().equals( ((BlockHitResult) renderManager.hitResult).getBlockPos() ) )
+        {
+            disableLightmap( true );
+            GameRenderer.renderFloatingText(
+                getFontRenderer(), label,
+                (float) posX + 0.5F, (float) posY + 1.2F, (float) posZ + 0.5F, 0,
+                renderManager.cameraEntity.getYaw(), renderManager.cameraEntity.getPitch(), false
+            );
+            disableLightmap( false );
+        }
+
         GlStateManager.pushMatrix();
         try
         {
+            BlockState state = turtle.getCachedState();
             // Setup the transform
-            Vec3d offset;
-            float yaw;
-            offset = turtle.getRenderOffset( f );
-            yaw = turtle.getRenderYaw( f );
-            GlStateManager.translate( posX + offset.x, posY + offset.y, posZ + offset.z );
-
-            // Render the label
-            String label = turtle.createProxy().getLabel();
-            if( label != null )
-            {
-                renderLabel( turtle.getAccess().getPosition(), label );
-            }
-
+            Vec3d offset = turtle.getRenderOffset( partialTicks );
+            float yaw = turtle.getRenderYaw( partialTicks );
+            GlStateManager.translated( posX + offset.x, posY + offset.y, posZ + offset.z );
             // Render the turtle
-            GlStateManager.translate( 0.5f, 0.5f, 0.5f );
-            GlStateManager.rotate( 180.0f - yaw, 0.0f, 1.0f, 0.0f );
+            GlStateManager.translatef( 0.5f, 0.5f, 0.5f );
+            GlStateManager.rotatef( 180.0f - yaw, 0.0f, 1.0f, 0.0f );
             if( label != null && (label.equals( "Dinnerbone" ) || label.equals( "Grumm" )) )
             {
                 // Flip the model and swap the cull face as winding order will have changed.
-                GlStateManager.scale( 1.0f, -1.0f, 1.0f );
-                GlStateManager.cullFace( GlStateManager.CullFace.FRONT );
+                GlStateManager.scalef( 1.0f, -1.0f, 1.0f );
+                GlStateManager.cullFace( GlStateManager.FaceSides.FRONT );
             }
-            GlStateManager.translate( -0.5f, -0.5f, -0.5f );
+            GlStateManager.translatef( -0.5f, -0.5f, -0.5f );
             // Render the turtle
-            int colour;
-            ComputerFamily family;
-            ResourceLocation overlay;
-            colour = turtle.getColour();
-            family = turtle.getFamily();
-            overlay = turtle.getOverlay();
+            int colour = turtle.getColour();
+            ComputerFamily family = turtle.getFamily();
+            Identifier overlay = turtle.getOverlay();
 
             renderModel( state, getTurtleModel( family, colour != -1 ), colour == -1 ? null : new int[] { colour } );
 
             // Render the overlay
-            ModelResourceLocation overlayModel = getTurtleOverlayModel(
-                family,
+            ModelIdentifier overlayModel = getTurtleOverlayModel(
                 overlay,
                 HolidayUtil.getCurrentHoliday() == Holiday.Christmas
             );
@@ -144,17 +142,17 @@ public class TileEntityTurtleRenderer extends TileEntitySpecialRenderer<TileTurt
             }
 
             // Render the upgrades
-            renderUpgrade( state, turtle, TurtleSide.Left, f );
-            renderUpgrade( state, turtle, TurtleSide.Right, f );
+            renderUpgrade( state, turtle, TurtleSide.Left, partialTicks );
+            renderUpgrade( state, turtle, TurtleSide.Right, partialTicks );
         }
         finally
         {
             GlStateManager.popMatrix();
-            GlStateManager.cullFace( GlStateManager.CullFace.BACK );
+            GlStateManager.cullFace( GlStateManager.FaceSides.BACK );
         }
     }
 
-    private void renderUpgrade( IBlockState state, TileTurtle turtle, TurtleSide side, float f )
+    private void renderUpgrade( BlockState state, TileTurtle turtle, TurtleSide side, float f )
     {
         ITurtleUpgrade upgrade = turtle.getUpgrade( side );
         if( upgrade != null )
@@ -163,16 +161,25 @@ public class TileEntityTurtleRenderer extends TileEntitySpecialRenderer<TileTurt
             try
             {
                 float toolAngle = turtle.getToolRenderAngle( side, f );
-                GlStateManager.translate( 0.0f, 0.5f, 0.5f );
-                GlStateManager.rotate( -toolAngle, 1.0f, 0.0f, 0.0f );
-                GlStateManager.translate( 0.0f, -0.5f, -0.5f );
+                GlStateManager.translatef( 0.0f, 0.5f, 0.5f );
+                GlStateManager.rotatef( -toolAngle, 1.0f, 0.0f, 0.0f );
+                GlStateManager.translatef( 0.0f, -0.5f, -0.5f );
 
-                Pair<IBakedModel, Matrix4f> pair = upgrade.getModel( turtle.getAccess(), side );
+                Pair<BakedModel, Matrix4f> pair = upgrade.getModel( turtle.getAccess(), side );
                 if( pair != null )
                 {
                     if( pair.getRight() != null )
                     {
-                        ForgeHooksClient.multiplyCurrentGlMatrix( pair.getRight() );
+                        matrixBuf.clear();
+                        float[] t = new float[4];
+                        for( int i = 0; i < 4; i++ )
+                        {
+                            pair.getRight().getColumn( i, t );
+                            matrixBuf.put( t );
+                        }
+                        matrixBuf.flip();
+
+                        GlStateManager.multMatrix( matrixBuf );
                     }
                     if( pair.getLeft() != null )
                     {
@@ -187,117 +194,44 @@ public class TileEntityTurtleRenderer extends TileEntitySpecialRenderer<TileTurt
         }
     }
 
-    private void renderModel( IBlockState state, ModelResourceLocation modelLocation, int[] tints )
+    private void renderModel( BlockState state, ModelIdentifier modelLocation, int[] tints )
     {
-        Minecraft mc = Minecraft.getMinecraft();
-        ModelManager modelManager = mc.getRenderItem().getItemModelMesher().getModelManager();
+        MinecraftClient mc = MinecraftClient.getInstance();
+        BakedModelManager modelManager = mc.getItemRenderer().getModels().getModelManager();
         renderModel( state, modelManager.getModel( modelLocation ), tints );
     }
 
-    private void renderModel( IBlockState state, IBakedModel model, int[] tints )
+    private void renderModel( BlockState state, BakedModel model, int[] tints )
     {
-        Minecraft mc = Minecraft.getMinecraft();
+        Random random = new Random( 0 );
         Tessellator tessellator = Tessellator.getInstance();
-        mc.getTextureManager().bindTexture( TextureMap.LOCATION_BLOCKS_TEXTURE );
-        renderQuads( tessellator, model.getQuads( state, null, 0 ), tints );
-        for( EnumFacing facing : EnumFacing.VALUES )
+        renderManager.textureManager.bindTexture( SpriteAtlasTexture.BLOCK_ATLAS_TEX );
+        renderQuads( tessellator, model.getQuads( state, null, random ), tints );
+        for( Direction facing : DirectionUtil.FACINGS )
         {
-            renderQuads( tessellator, model.getQuads( state, facing, 0 ), tints );
+            renderQuads( tessellator, model.getQuads( state, facing, random ), tints );
         }
     }
 
-    private void renderQuads( Tessellator tessellator, List<BakedQuad> quads, int[] tints )
+    private static void renderQuads( Tessellator tessellator, List<BakedQuad> quads, int[] tints )
     {
-        BufferBuilder buffer = tessellator.getBuffer();
-        VertexFormat format = DefaultVertexFormats.ITEM;
+        BufferBuilder buffer = tessellator.getBufferBuilder();
+        VertexFormat format = VertexFormats.POSITION_COLOR_UV_NORMAL;
         buffer.begin( GL11.GL_QUADS, format );
         for( BakedQuad quad : quads )
         {
-            VertexFormat quadFormat = quad.getFormat();
-            if( quadFormat != format )
-            {
-                tessellator.draw();
-                format = quadFormat;
-                buffer.begin( GL11.GL_QUADS, format );
-            }
-
             int colour = 0xFFFFFFFF;
-            if( quad.hasTintIndex() && tints != null )
+            if( quad.hasColor() && tints != null )
             {
-                int index = quad.getTintIndex();
+                int index = quad.getColorIndex();
                 if( index >= 0 && index < tints.length ) colour = tints[index] | 0xFF000000;
             }
 
-            LightUtil.renderQuadColor( buffer, quad, colour );
+            buffer.putVertexData( quad.getVertexData() );
+            buffer.setQuadColor( colour );
+            Vec3i normal = quad.getFace().getVector();
+            buffer.postNormal( normal.getX(), normal.getY(), normal.getZ() );
         }
         tessellator.draw();
     }
-
-    private void renderLabel( BlockPos position, String label )
-    {
-        Minecraft mc = Minecraft.getMinecraft();
-        RayTraceResult mop = mc.objectMouseOver;
-        if( mop != null && mop.typeOfHit == RayTraceResult.Type.BLOCK && mop.getBlockPos().equals( position ) )
-        {
-            RenderManager renderManager = mc.getRenderManager();
-            FontRenderer fontrenderer = renderManager.getFontRenderer();
-            float scale = 0.016666668F * 1.6f;
-
-            GlStateManager.pushMatrix();
-            GlStateManager.disableLighting();
-            GlStateManager.enableBlend();
-            GlStateManager.blendFunc( GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA );
-            try
-            {
-                GlStateManager.translate( 0.5f, 1.25f, 0.5f );
-                GlStateManager.rotate( -renderManager.playerViewY, 0.0F, 1.0F, 0.0F );
-                GlStateManager.rotate( renderManager.playerViewX, 1.0F, 0.0F, 0.0F );
-                GlStateManager.scale( -scale, -scale, scale );
-
-                int yOffset = 0;
-                int xOffset = fontrenderer.getStringWidth( label ) / 2;
-
-                // Draw background
-                GlStateManager.depthMask( false );
-                GlStateManager.disableDepth();
-                try
-                {
-                    // Quad
-                    GlStateManager.disableTexture2D();
-                    try
-                    {
-                        Tessellator tessellator = Tessellator.getInstance();
-                        BufferBuilder renderer = tessellator.getBuffer();
-                        renderer.begin( GL11.GL_QUADS, DefaultVertexFormats.POSITION_COLOR );
-                        renderer.pos( -xOffset - 1, -1 + yOffset, 0.0D ).color( 0.0F, 0.0F, 0.0F, 0.25F ).endVertex();
-                        renderer.pos( -xOffset - 1, 8 + yOffset, 0.0D ).color( 0.0F, 0.0F, 0.0F, 0.25F ).endVertex();
-                        renderer.pos( xOffset + 1, 8 + yOffset, 0.0D ).color( 0.0F, 0.0F, 0.0F, 0.25F ).endVertex();
-                        renderer.pos( xOffset + 1, -1 + yOffset, 0.0D ).color( 0.0F, 0.0F, 0.0F, 0.25F ).endVertex();
-                        tessellator.draw();
-                    }
-                    finally
-                    {
-                        GlStateManager.enableTexture2D();
-                    }
-
-                    // Text
-                    fontrenderer.drawString( label, -fontrenderer.getStringWidth( label ) / 2, yOffset, 0x20ffffff );
-                }
-                finally
-                {
-                    GlStateManager.enableDepth();
-                    GlStateManager.depthMask( true );
-                }
-
-                // Draw foreground text
-                fontrenderer.drawString( label, -fontrenderer.getStringWidth( label ) / 2, yOffset, -1 );
-            }
-            finally
-            {
-                GlStateManager.disableBlend();
-                GlStateManager.enableLighting();
-                GlStateManager.popMatrix();
-            }
-        }
-    }
 }

src/main/java/dan200/computercraft/client/render/TurtleModelLoader.java

@@ -0,0 +1,92 @@
+/*
+ * This file is part of ComputerCraft - http://www.computercraft.info
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
+ * Send enquiries to dratcliffe@gmail.com
+ */
+
+package dan200.computercraft.client.render;
+
+import dan200.computercraft.ComputerCraft;
+import net.minecraft.client.render.model.BakedModel;
+import net.minecraft.client.render.model.ModelBakeSettings;
+import net.minecraft.client.render.model.ModelLoader;
+import net.minecraft.client.render.model.UnbakedModel;
+import net.minecraft.client.texture.Sprite;
+import net.minecraft.util.Identifier;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Set;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+
+public final class TurtleModelLoader
+{
+    private static final Identifier NORMAL_TURTLE_MODEL = new Identifier( ComputerCraft.MOD_ID, "block/turtle_normal" );
+    private static final Identifier ADVANCED_TURTLE_MODEL = new Identifier( ComputerCraft.MOD_ID, "block/turtle_advanced" );
+    private static final Identifier COLOUR_TURTLE_MODEL = new Identifier( ComputerCraft.MOD_ID, "block/turtle_colour" );
+
+    public static final TurtleModelLoader INSTANCE = new TurtleModelLoader();
+
+    private TurtleModelLoader()
+    {
+    }
+
+    public boolean accepts( @Nonnull Identifier name )
+    {
+        return name.getNamespace().equals( ComputerCraft.MOD_ID )
+            && (name.getPath().equals( "item/turtle_normal" ) || name.getPath().equals( "item/turtle_advanced" ));
+    }
+
+    @Nonnull
+    public UnbakedModel loadModel( @Nonnull Identifier name )
+    {
+        if( name.getNamespace().equals( ComputerCraft.MOD_ID ) )
+        {
+            switch( name.getPath() )
+            {
+                case "item/turtle_normal":
+                    return new TurtleModel( NORMAL_TURTLE_MODEL );
+                case "item/turtle_advanced":
+                    return new TurtleModel( ADVANCED_TURTLE_MODEL );
+            }
+        }
+
+        throw new IllegalStateException( "Loader does not accept " + name );
+    }
+
+    private static final class TurtleModel implements UnbakedModel
+    {
+        private final Identifier family;
+
+        private TurtleModel( Identifier family ) {this.family = family;}
+
+        @Nonnull
+        @Override
+        public Collection<Identifier> getModelDependencies()
+        {
+            return Arrays.asList( family, COLOUR_TURTLE_MODEL );
+        }
+
+        @Nonnull
+        @Override
+        public Collection<Identifier> getTextureDependencies( @Nonnull Function<Identifier, UnbakedModel> modelGetter, @Nonnull Set<String> missingTextureErrors )
+        {
+            return getModelDependencies().stream()
+                .flatMap( x -> modelGetter.apply( x ).getTextureDependencies( modelGetter, missingTextureErrors ).stream() )
+                .collect( Collectors.toSet() );
+        }
+
+        @Nullable
+        @Override
+        public BakedModel bake( @Nonnull ModelLoader loader, @Nonnull Function<Identifier, Sprite> spriteGetter, @Nonnull ModelBakeSettings state )
+        {
+            return new TurtleSmartItemModel(
+                loader.getOrLoadModel( family ).bake( loader, spriteGetter, state ),
+                loader.getOrLoadModel( COLOUR_TURTLE_MODEL ).bake( loader, spriteGetter, state )
+            );
+        }
+    }
+}

src/main/java/dan200/computercraft/client/render/TurtleMultiModel.java

@@ -6,34 +6,31 @@
 
 package dan200.computercraft.client.render;
 
-import net.minecraft.block.state.IBlockState;
-import net.minecraft.client.renderer.block.model.BakedQuad;
-import net.minecraft.client.renderer.block.model.IBakedModel;
-import net.minecraft.client.renderer.block.model.ItemCameraTransforms;
-import net.minecraft.client.renderer.block.model.ItemOverrideList;
-import net.minecraft.client.renderer.texture.TextureAtlasSprite;
-import net.minecraft.util.EnumFacing;
+import net.minecraft.block.BlockState;
+import net.minecraft.client.render.model.BakedModel;
+import net.minecraft.client.render.model.BakedQuad;
+import net.minecraft.client.render.model.json.ModelItemPropertyOverrideList;
+import net.minecraft.client.render.model.json.ModelTransformation;
+import net.minecraft.client.texture.Sprite;
+import net.minecraft.util.math.Direction;
 
 import javax.annotation.Nonnull;
 import javax.vecmath.Matrix4f;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
+import java.util.*;
 
-public class TurtleMultiModel implements IBakedModel
+public class TurtleMultiModel implements BakedModel
 {
-    private final IBakedModel m_baseModel;
-    private final IBakedModel m_overlayModel;
+    private final BakedModel m_baseModel;
+    private final BakedModel m_overlayModel;
     private final Matrix4f m_generalTransform;
-    private final IBakedModel m_leftUpgradeModel;
+    private final BakedModel m_leftUpgradeModel;
     private final Matrix4f m_leftUpgradeTransform;
-    private final IBakedModel m_rightUpgradeModel;
+    private final BakedModel m_rightUpgradeModel;
     private final Matrix4f m_rightUpgradeTransform;
-    private List<BakedQuad> m_generalQuads;
-    private Map<EnumFacing, List<BakedQuad>> m_faceQuads;
+    private List<BakedQuad> m_generalQuads = null;
+    private Map<Direction, List<BakedQuad>> m_faceQuads = new EnumMap<>( Direction.class );
 
-    public TurtleMultiModel( IBakedModel baseModel, IBakedModel overlayModel, Matrix4f generalTransform, IBakedModel leftUpgradeModel, Matrix4f leftUpgradeTransform, IBakedModel rightUpgradeModel, Matrix4f rightUpgradeTransform )
+    public TurtleMultiModel( BakedModel baseModel, BakedModel overlayModel, Matrix4f generalTransform, BakedModel leftUpgradeModel, Matrix4f leftUpgradeTransform, BakedModel rightUpgradeModel, Matrix4f rightUpgradeTransform )
     {
         // Get the models
         m_baseModel = baseModel;
@@ -43,13 +40,11 @@ public class TurtleMultiModel implements IBakedModel
         m_rightUpgradeModel = rightUpgradeModel;
         m_rightUpgradeTransform = rightUpgradeTransform;
         m_generalTransform = generalTransform;
-        m_generalQuads = null;
-        m_faceQuads = new HashMap<>();
     }
 
     @Nonnull
     @Override
-    public List<BakedQuad> getQuads( IBlockState state, EnumFacing side, long rand )
+    public List<BakedQuad> getQuads( BlockState state, Direction side, Random rand )
     {
         if( side != null )
         {
@@ -63,7 +58,7 @@ public class TurtleMultiModel implements IBakedModel
         }
     }
 
-    private List<BakedQuad> buildQuads( IBlockState state, EnumFacing side, long rand )
+    private List<BakedQuad> buildQuads( BlockState state, Direction side, Random rand )
     {
         ArrayList<BakedQuad> quads = new ArrayList<>();
         ModelTransformer.transformQuadsTo( quads, m_baseModel.getQuads( state, side, rand ), m_generalTransform );
@@ -100,42 +95,38 @@ public class TurtleMultiModel implements IBakedModel
     }
 
     @Override
-    public boolean isAmbientOcclusion()
+    public boolean useAmbientOcclusion()
     {
-        return m_baseModel.isAmbientOcclusion();
+        return m_baseModel.useAmbientOcclusion();
     }
 
     @Override
-    public boolean isGui3d()
+    public boolean hasDepthInGui()
     {
-        return m_baseModel.isGui3d();
+        return m_baseModel.hasDepthInGui();
     }
 
     @Override
-    public boolean isBuiltInRenderer()
+    public boolean isBuiltin()
     {
-        return m_baseModel.isBuiltInRenderer();
+        return m_baseModel.isBuiltin();
     }
 
-    @Nonnull
     @Override
-    public TextureAtlasSprite getParticleTexture()
+    public Sprite getSprite()
     {
-        return m_baseModel.getParticleTexture();
+        return m_baseModel.getSprite();
     }
 
-    @Nonnull
     @Override
-    @Deprecated
-    public ItemCameraTransforms getItemCameraTransforms()
+    public ModelTransformation getTransformation()
     {
-        return m_baseModel.getItemCameraTransforms();
+        return m_baseModel.getTransformation();
     }
 
-    @Nonnull
     @Override
-    public ItemOverrideList getOverrides()
+    public ModelItemPropertyOverrideList getItemPropertyOverrides()
     {
-        return ItemOverrideList.NONE;
+        return ModelItemPropertyOverrideList.EMPTY;
     }
 }

src/main/java/dan200/computercraft/client/render/TurtleSmartItemModel.java

@@ -9,34 +9,34 @@ package dan200.computercraft.client.render;
 import com.google.common.base.Objects;
 import dan200.computercraft.api.turtle.ITurtleUpgrade;
 import dan200.computercraft.api.turtle.TurtleSide;
-import dan200.computercraft.shared.computer.core.ComputerFamily;
-import dan200.computercraft.shared.turtle.items.ItemTurtleBase;
+import dan200.computercraft.shared.turtle.items.ItemTurtle;
 import dan200.computercraft.shared.util.Holiday;
 import dan200.computercraft.shared.util.HolidayUtil;
-import net.minecraft.block.state.IBlockState;
-import net.minecraft.client.Minecraft;
-import net.minecraft.client.renderer.block.model.*;
-import net.minecraft.client.renderer.texture.TextureAtlasSprite;
-import net.minecraft.client.resources.IResourceManager;
-import net.minecraft.entity.EntityLivingBase;
+import net.minecraft.block.BlockState;
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.client.render.model.BakedModel;
+import net.minecraft.client.render.model.BakedModelManager;
+import net.minecraft.client.render.model.BakedQuad;
+import net.minecraft.client.render.model.json.ModelItemPropertyOverrideList;
+import net.minecraft.client.render.model.json.ModelTransformation;
+import net.minecraft.client.texture.Sprite;
+import net.minecraft.client.util.ModelIdentifier;
+import net.minecraft.entity.LivingEntity;
 import net.minecraft.item.ItemStack;
-import net.minecraft.util.EnumFacing;
-import net.minecraft.util.ResourceLocation;
+import net.minecraft.util.Identifier;
+import net.minecraft.util.math.Direction;
 import net.minecraft.world.World;
-import net.minecraftforge.client.resource.IResourceType;
-import net.minecraftforge.client.resource.ISelectiveResourceReloadListener;
-import net.minecraftforge.client.resource.VanillaResourceType;
 import org.apache.commons.lang3.tuple.Pair;
 
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 import javax.vecmath.Matrix4f;
-import java.util.ArrayList;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
-import java.util.function.Predicate;
+import java.util.Random;
 
-public class TurtleSmartItemModel implements IBakedModel, ISelectiveResourceReloadListener
+public class TurtleSmartItemModel implements BakedModel
 {
     private static final Matrix4f s_identity, s_flip;
 
@@ -53,17 +53,15 @@ public class TurtleSmartItemModel implements IBakedModel, ISelectiveResourceRelo
 
     private static class TurtleModelCombination
     {
-        public final ComputerFamily m_family;
-        public final boolean m_colour;
-        public final ITurtleUpgrade m_leftUpgrade;
-        public final ITurtleUpgrade m_rightUpgrade;
-        public final ResourceLocation m_overlay;
-        public final boolean m_christmas;
-        public final boolean m_flip;
+        final boolean m_colour;
+        final ITurtleUpgrade m_leftUpgrade;
+        final ITurtleUpgrade m_rightUpgrade;
+        final Identifier m_overlay;
+        final boolean m_christmas;
+        final boolean m_flip;
 
-        public TurtleModelCombination( ComputerFamily family, boolean colour, ITurtleUpgrade leftUpgrade, ITurtleUpgrade rightUpgrade, ResourceLocation overlay, boolean christmas, boolean flip )
+        TurtleModelCombination( boolean colour, ITurtleUpgrade leftUpgrade, ITurtleUpgrade rightUpgrade, Identifier overlay, boolean christmas, boolean flip )
         {
-            m_family = family;
             m_colour = colour;
             m_leftUpgrade = leftUpgrade;
             m_rightUpgrade = rightUpgrade;
@@ -79,8 +77,7 @@ public class TurtleSmartItemModel implements IBakedModel, ISelectiveResourceRelo
             if( !(other instanceof TurtleModelCombination) ) return false;
 
             TurtleModelCombination otherCombo = (TurtleModelCombination) other;
-            return otherCombo.m_family == m_family &&
-                otherCombo.m_colour == m_colour &&
+            return otherCombo.m_colour == m_colour &&
                 otherCombo.m_leftUpgrade == m_leftUpgrade &&
                 otherCombo.m_rightUpgrade == m_rightUpgrade &&
                 Objects.equal( otherCombo.m_overlay, m_overlay ) &&
@@ -92,8 +89,7 @@ public class TurtleSmartItemModel implements IBakedModel, ISelectiveResourceRelo
         public int hashCode()
         {
             final int prime = 31;
-            int result = 1;
-            result = prime * result + m_family.hashCode();
+            int result = 0;
             result = prime * result + (m_colour ? 1 : 0);
             result = prime * result + (m_leftUpgrade != null ? m_leftUpgrade.hashCode() : 0);
             result = prime * result + (m_rightUpgrade != null ? m_rightUpgrade.hashCode() : 0);
@@ -104,68 +100,59 @@ public class TurtleSmartItemModel implements IBakedModel, ISelectiveResourceRelo
         }
     }
 
-    private HashMap<TurtleModelCombination, IBakedModel> m_cachedModels;
-    private ItemOverrideList m_overrides;
-    private final TurtleModelCombination m_defaultCombination;
+    private final BakedModel familyModel;
+    private final BakedModel colourModel;
 
-    public TurtleSmartItemModel()
+    private HashMap<TurtleModelCombination, BakedModel> m_cachedModels;
+    private ModelItemPropertyOverrideList m_overrides;
+
+    public TurtleSmartItemModel( BakedModel familyModel, BakedModel colourModel )
     {
+        this.familyModel = familyModel;
+        this.colourModel = colourModel;
+
         m_cachedModels = new HashMap<>();
-        m_defaultCombination = new TurtleModelCombination( ComputerFamily.Normal, false, null, null, null, false, false );
-        m_overrides = new ItemOverrideList( new ArrayList<>() )
+        m_overrides = new ModelItemPropertyOverrideList( null, null, null, Collections.emptyList() )
         {
             @Nonnull
             @Override
-            public IBakedModel handleItemState( @Nonnull IBakedModel originalModel, @Nonnull ItemStack stack, @Nullable World world, @Nullable EntityLivingBase entity )
+            public BakedModel apply( @Nonnull BakedModel originalModel, @Nonnull ItemStack stack, @Nullable World world, @Nullable LivingEntity entity )
             {
-                ItemTurtleBase turtle = (ItemTurtleBase) stack.getItem();
-                ComputerFamily family = turtle.getFamily( stack );
+                ItemTurtle turtle = (ItemTurtle) stack.getItem();
                 int colour = turtle.getColour( stack );
                 ITurtleUpgrade leftUpgrade = turtle.getUpgrade( stack, TurtleSide.Left );
                 ITurtleUpgrade rightUpgrade = turtle.getUpgrade( stack, TurtleSide.Right );
-                ResourceLocation overlay = turtle.getOverlay( stack );
+                Identifier overlay = turtle.getOverlay( stack );
                 boolean christmas = HolidayUtil.getCurrentHoliday() == Holiday.Christmas;
                 String label = turtle.getLabel( stack );
                 boolean flip = label != null && (label.equals( "Dinnerbone" ) || label.equals( "Grumm" ));
-                TurtleModelCombination combo = new TurtleModelCombination( family, colour != -1, leftUpgrade, rightUpgrade, overlay, christmas, flip );
-                if( m_cachedModels.containsKey( combo ) )
-                {
-                    return m_cachedModels.get( combo );
-                }
-                else
-                {
-                    IBakedModel model = buildModel( combo );
-                    m_cachedModels.put( combo, model );
-                    return model;
-                }
+                TurtleModelCombination combo = new TurtleModelCombination( colour != -1, leftUpgrade, rightUpgrade, overlay, christmas, flip );
+
+                BakedModel model = m_cachedModels.get( combo );
+                if( model == null ) m_cachedModels.put( combo, model = buildModel( combo ) );
+                return model;
             }
         };
     }
 
     @Nonnull
     @Override
-    public ItemOverrideList getOverrides()
+    public ModelItemPropertyOverrideList getItemPropertyOverrides()
     {
         return m_overrides;
     }
 
-    @Override
-    public void onResourceManagerReload( @Nonnull IResourceManager resourceManager, @Nonnull Predicate<IResourceType> resourcePredicate )
+    private BakedModel buildModel( TurtleModelCombination combo )
     {
-        if( resourcePredicate.test( VanillaResourceType.MODELS ) ) m_cachedModels.clear();
-    }
+        MinecraftClient mc = MinecraftClient.getInstance();
+        BakedModelManager modelManager = mc.getItemRenderer().getModels().getModelManager();
+        ModelIdentifier overlayModelLocation = TileEntityTurtleRenderer.getTurtleOverlayModel( combo.m_overlay, combo.m_christmas );
 
-    private IBakedModel buildModel( TurtleModelCombination combo )
-    {
-        Minecraft mc = Minecraft.getMinecraft();
-        ModelManager modelManager = mc.getRenderItem().getItemModelMesher().getModelManager();
-        ModelResourceLocation baseModelLocation = TileEntityTurtleRenderer.getTurtleModel( combo.m_family, combo.m_colour );
-        ModelResourceLocation overlayModelLocation = TileEntityTurtleRenderer.getTurtleOverlayModel( combo.m_family, combo.m_overlay, combo.m_christmas );
-        IBakedModel baseModel = modelManager.getModel( baseModelLocation );
-        IBakedModel overlayModel = (overlayModelLocation != null) ? modelManager.getModel( overlayModelLocation ) : null;
+        BakedModel baseModel = combo.m_colour ? colourModel : familyModel;
+        BakedModel overlayModel = overlayModelLocation != null ? modelManager.getModel( overlayModelLocation ) : null;
         Matrix4f transform = combo.m_flip ? s_flip : s_identity;
-        Pair<IBakedModel, Matrix4f> leftModel = (combo.m_leftUpgrade != null) ? combo.m_leftUpgrade.getModel( null, TurtleSide.Left ) : null;
-        Pair<IBakedModel, Matrix4f> rightModel = (combo.m_rightUpgrade != null) ? combo.m_rightUpgrade.getModel( null, TurtleSide.Right ) : null;
+        Pair<BakedModel, Matrix4f> leftModel = combo.m_leftUpgrade != null ? combo.m_leftUpgrade.getModel( null, TurtleSide.Left ) : null;
+        Pair<BakedModel, Matrix4f> rightModel = combo.m_rightUpgrade != null ? combo.m_rightUpgrade.getModel( null, TurtleSide.Right ) : null;
         if( leftModel != null && rightModel != null )
         {
             return new TurtleMultiModel( baseModel, overlayModel, transform, leftModel.getLeft(), leftModel.getRight(), rightModel.getLeft(), rightModel.getRight() );
@@ -184,57 +171,40 @@ public class TurtleSmartItemModel implements IBakedModel, ISelectiveResourceRelo
         }
     }
 
-    // These should not be called:
-
     @Nonnull
     @Override
-    public List<BakedQuad> getQuads( IBlockState state, EnumFacing facing, long rand )
+    public List<BakedQuad> getQuads( BlockState state, Direction facing, Random rand )
     {
-        return getDefaultModel().getQuads( state, facing, rand );
+        return familyModel.getQuads( state, facing, rand );
     }
 
     @Override
-    public boolean isAmbientOcclusion()
+    public boolean useAmbientOcclusion()
     {
-        return getDefaultModel().isAmbientOcclusion();
+        return familyModel.useAmbientOcclusion();
     }
 
     @Override
-    public boolean isGui3d()
+    public boolean hasDepthInGui()
     {
-        return getDefaultModel().isGui3d();
+        return familyModel.hasDepthInGui();
     }
 
     @Override
-    public boolean isBuiltInRenderer()
+    public boolean isBuiltin()
     {
-        return getDefaultModel().isBuiltInRenderer();
+        return familyModel.isBuiltin();
     }
 
-    @Nonnull
     @Override
-    public TextureAtlasSprite getParticleTexture()
+    public Sprite getSprite()
     {
-        return getDefaultModel().getParticleTexture();
+        return null;
     }
 
-    @Nonnull
     @Override
-    @Deprecated
-    public ItemCameraTransforms getItemCameraTransforms()
+    public ModelTransformation getTransformation()
     {
-        return getDefaultModel().getItemCameraTransforms();
-    }
-
-    private IBakedModel getDefaultModel()
-    {
-        IBakedModel model = m_cachedModels.get( m_defaultCombination );
-        if( model == null )
-        {
-            model = buildModel( m_defaultCombination );
-            m_cachedModels.put( m_defaultCombination, model );
-        }
-
-        return model;
+        return familyModel.getTransformation();
     }
 }

src/main/java/dan200/computercraft/core/apis/AddressPredicate.java

@@ -12,6 +12,7 @@ import dan200.computercraft.ComputerCraft;
 import java.net.Inet6Address;
 import java.net.InetAddress;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 import java.util.regex.Pattern;
 
@@ -20,7 +21,7 @@ import java.util.regex.Pattern;
  */
 public class AddressPredicate
 {
-    private static class HostRange
+    private static final class HostRange
     {
         private final byte[] min;
         private final byte[] max;
@@ -50,6 +51,11 @@ public class AddressPredicate
     private final List<HostRange> ranges;
 
     public AddressPredicate( String... filters )
+    {
+        this( Arrays.asList( filters ) );
+    }
+
+    public AddressPredicate( Iterable<? extends String> filters )
     {
         List<Pattern> wildcards = this.wildcards = new ArrayList<>();
         List<HostRange> ranges = this.ranges = new ArrayList<>();
@@ -69,7 +75,10 @@ public class AddressPredicate
                 }
                 catch( NumberFormatException e )
                 {
-                    ComputerCraft.log.warn( "Cannot parse CIDR size from {} ({})", filter, prefixSizeStr );
+                    ComputerCraft.log.error(
+                        "Malformed http whitelist/blacklist entry '{}': Cannot extract size of CIDR mask from '{}'.",
+                        filter, prefixSizeStr
+                    );
                     continue;
                 }
 
@@ -80,7 +89,10 @@ public class AddressPredicate
                 }
                 catch( IllegalArgumentException e )
                 {
-                    ComputerCraft.log.warn( "Cannot parse IP address from {} ({})", filter, addressStr );
+                    ComputerCraft.log.error(
+                        "Malformed http whitelist/blacklist entry '{}': Cannot extract IP address from '{}'.",
+                        filter, prefixSizeStr
+                    );
                     continue;
                 }
 

src/main/java/dan200/computercraft/core/apis/ApiFactories.java

@@ -6,13 +6,13 @@
 
 package dan200.computercraft.core.apis;
 
-import com.google.common.base.Preconditions;
 import dan200.computercraft.api.lua.ILuaAPIFactory;
 
 import javax.annotation.Nonnull;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.LinkedHashSet;
+import java.util.Objects;
 
 public final class ApiFactories
 {
@@ -23,9 +23,9 @@ public final class ApiFactories
     private static final Collection<ILuaAPIFactory> factories = new LinkedHashSet<>();
     private static final Collection<ILuaAPIFactory> factoriesView = Collections.unmodifiableCollection( factories );
 
-    public static void register( @Nonnull ILuaAPIFactory factory )
+    public static synchronized void register( @Nonnull ILuaAPIFactory factory )
     {
-        Preconditions.checkNotNull( factory, "provider cannot be null" );
+        Objects.requireNonNull( factory, "provider cannot be null" );
         factories.add( factory );
     }
 

src/main/java/dan200/computercraft/core/apis/ComputerAccess.java

@@ -6,12 +6,10 @@
 
 package dan200.computercraft.core.apis;
 
-import com.google.common.base.Preconditions;
 import dan200.computercraft.api.filesystem.IMount;
 import dan200.computercraft.api.filesystem.IWritableMount;
 import dan200.computercraft.api.peripheral.IComputerAccess;
-import dan200.computercraft.core.computer.Computer;
-import dan200.computercraft.core.computer.IComputerOwned;
+import dan200.computercraft.api.peripheral.IWorkMonitor;
 import dan200.computercraft.core.filesystem.FileSystem;
 import dan200.computercraft.core.filesystem.FileSystemException;
 
@@ -21,22 +19,22 @@ import java.util.HashSet;
 import java.util.Objects;
 import java.util.Set;
 
-public abstract class ComputerAccess implements IComputerAccess, IComputerOwned
+public abstract class ComputerAccess implements IComputerAccess
 {
     private final IAPIEnvironment m_environment;
     private final Set<String> m_mounts = new HashSet<>();
 
-    protected ComputerAccess( IAPIEnvironment m_environment )
+    protected ComputerAccess( IAPIEnvironment environment )
     {
-        this.m_environment = m_environment;
+        this.m_environment = environment;
     }
 
     public void unmountAll()
     {
         FileSystem fileSystem = m_environment.getFileSystem();
-        for( String m_mount : m_mounts )
+        for( String mount : m_mounts )
         {
-            fileSystem.unmount( m_mount );
+            fileSystem.unmount( mount );
         }
         m_mounts.clear();
     }
@@ -122,15 +120,15 @@ public abstract class ComputerAccess implements IComputerAccess, IComputerOwned
     @Override
     public void queueEvent( @Nonnull final String event, final Object[] arguments )
     {
-        Preconditions.checkNotNull( event, "event cannot be null" );
+        Objects.requireNonNull( event, "event cannot be null" );
         m_environment.queueEvent( event, arguments );
     }
 
     @Nullable
     @Override
-    public Computer getComputer()
+    public IWorkMonitor getMainThreadMonitor()
     {
-        return m_environment.getComputer();
+        return m_environment.getMainThreadMonitor();
     }
 
     private String findFreeLocation( String desiredLoc )

src/main/java/dan200/computercraft/core/apis/FSAPI.java

@@ -34,9 +34,9 @@ public class FSAPI implements ILuaAPI
     private IAPIEnvironment m_env;
     private FileSystem m_fileSystem;
 
-    public FSAPI( IAPIEnvironment _env )
+    public FSAPI( IAPIEnvironment env )
     {
-        m_env = _env;
+        m_env = env;
         m_fileSystem = null;
     }
 
@@ -353,10 +353,8 @@ public class FSAPI implements ILuaAPI
                 return new Object[] { FileSystem.getDirectory( path ) };
             }
             default:
-            {
-                assert (false);
+                assert false;
                 return null;
-            }
         }
     }
 }

src/main/java/dan200/computercraft/core/apis/HTTPAPI.java

@@ -199,9 +199,7 @@ public class HTTPAPI implements ILuaAPI
                 }
             }
             default:
-            {
                 return null;
-            }
         }
     }
 
@@ -209,14 +207,14 @@ public class HTTPAPI implements ILuaAPI
     private static HttpHeaders getHeaders( @Nonnull Map<?, ?> headerTable ) throws LuaException
     {
         HttpHeaders headers = new DefaultHttpHeaders();
-        for( Object key : headerTable.keySet() )
+        for( Map.Entry<?, ?> entry : headerTable.entrySet() )
         {
-            Object value = headerTable.get( key );
-            if( key instanceof String && value instanceof String )
+            Object value = entry.getValue();
+            if( entry.getKey() instanceof String && value instanceof String )
             {
                 try
                 {
-                    headers.add( (String) key, value );
+                    headers.add( (String) entry.getKey(), value );
                 }
                 catch( IllegalArgumentException e )
                 {

src/main/java/dan200/computercraft/core/apis/IAPIEnvironment.java

@@ -7,27 +7,33 @@
 package dan200.computercraft.core.apis;
 
 import dan200.computercraft.api.peripheral.IPeripheral;
-import dan200.computercraft.core.computer.Computer;
+import dan200.computercraft.api.peripheral.IWorkMonitor;
+import dan200.computercraft.core.computer.ComputerSide;
 import dan200.computercraft.core.computer.IComputerEnvironment;
-import dan200.computercraft.core.computer.IComputerOwned;
 import dan200.computercraft.core.filesystem.FileSystem;
 import dan200.computercraft.core.terminal.Terminal;
 import dan200.computercraft.core.tracking.TrackingField;
 
-public interface IAPIEnvironment extends IComputerOwned
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+
+public interface IAPIEnvironment
 {
+    @FunctionalInterface
     interface IPeripheralChangeListener
     {
-        void onPeripheralChanged( int side, IPeripheral newPeripheral );
+        void onPeripheralChanged( ComputerSide side, @Nullable IPeripheral newPeripheral );
     }
 
-    @Override
-    Computer getComputer();
-
     int getComputerID();
 
+    @Nonnull
     IComputerEnvironment getComputerEnvironment();
 
+    @Nonnull
+    IWorkMonitor getMainThreadMonitor();
+
+    @Nonnull
     Terminal getTerminal();
 
     FileSystem getFileSystem();
@@ -38,29 +44,30 @@ public interface IAPIEnvironment extends IComputerOwned
 
     void queueEvent( String event, Object[] args );
 
-    void setOutput( int side, int output );
+    void setOutput( ComputerSide side, int output );
 
-    int getOutput( int side );
+    int getOutput( ComputerSide side );
 
-    int getInput( int side );
+    int getInput( ComputerSide side );
 
-    void setBundledOutput( int side, int output );
+    void setBundledOutput( ComputerSide side, int output );
 
-    int getBundledOutput( int side );
+    int getBundledOutput( ComputerSide side );
 
-    int getBundledInput( int side );
+    int getBundledInput( ComputerSide side );
 
-    void setPeripheralChangeListener( IPeripheralChangeListener listener );
+    void setPeripheralChangeListener( @Nullable IPeripheralChangeListener listener );
 
-    IPeripheral getPeripheral( int side );
+    @Nullable
+    IPeripheral getPeripheral( ComputerSide side );
 
     String getLabel();
 
-    void setLabel( String label );
+    void setLabel( @Nullable String label );
 
-    void addTrackingChange( TrackingField field, long change );
+    void addTrackingChange( @Nonnull TrackingField field, long change );
 
-    default void addTrackingChange( TrackingField field )
+    default void addTrackingChange( @Nonnull TrackingField field )
     {
         addTrackingChange( field, 1 );
     }

src/main/java/dan200/computercraft/core/apis/ILuaAPI.java

@@ -16,6 +16,7 @@ public interface ILuaAPI extends dan200.computercraft.api.lua.ILuaAPI
 {
     void advance( double v );
 
+    @Override
     default void update()
     {
         advance( 0.05 );

src/main/java/dan200/computercraft/core/apis/OSAPI.java

@@ -39,7 +39,7 @@ public class OSAPI implements ILuaAPI
         }
     }
 
-    private class Alarm implements Comparable<Alarm>
+    private static class Alarm implements Comparable<Alarm>
     {
         public final double m_time;
         public final int m_day;
@@ -110,7 +110,7 @@ public class OSAPI implements ILuaAPI
             {
                 Map.Entry<Integer, Timer> entry = it.next();
                 Timer timer = entry.getValue();
-                timer.m_ticksLeft = timer.m_ticksLeft - 1;
+                timer.m_ticksLeft--;
                 if( timer.m_ticksLeft <= 0 )
                 {
                     // Queue the "timer" event
@@ -198,7 +198,7 @@ public class OSAPI implements ILuaAPI
 
     private int getDayForCalendar( Calendar c )
     {
-        GregorianCalendar g = (c instanceof GregorianCalendar) ? (GregorianCalendar) c : new GregorianCalendar();
+        GregorianCalendar g = c instanceof GregorianCalendar ? (GregorianCalendar) c : new GregorianCalendar();
         int year = c.get( Calendar.YEAR );
         int day = 0;
         for( int y = 1970; y < year; y++ )
@@ -219,12 +219,9 @@ public class OSAPI implements ILuaAPI
     {
         switch( method )
         {
-            case 0:
-            {
-                // queueEvent
+            case 0: // queueEvent
                 queueLuaEvent( getString( args, 0 ), trimArray( args, 1 ) );
                 return null;
-            }
             case 1:
             {
                 // startTimer
@@ -245,29 +242,20 @@ public class OSAPI implements ILuaAPI
                 }
                 synchronized( m_alarms )
                 {
-                    int day = (time > m_time) ? m_day : (m_day + 1);
+                    int day = time > m_time ? m_day : m_day + 1;
                     m_alarms.put( m_nextAlarmToken, new Alarm( time, day ) );
                     return new Object[] { m_nextAlarmToken++ };
                 }
             }
-            case 3:
-            {
-                // shutdown
+            case 3: // shutdown
                 m_apiEnvironment.shutdown();
                 return null;
-            }
-            case 4:
-            {
-                // reboot
+            case 4: // reboot
                 m_apiEnvironment.reboot();
                 return null;
-            }
             case 5:
-            case 6:
-            {
-                // computerID/getComputerID
+            case 6: // computerID/getComputerID
                 return new Object[] { getComputerID() };
-            }
             case 7:
             {
                 // setComputerLabel
@@ -286,19 +274,16 @@ public class OSAPI implements ILuaAPI
                 }
                 return null;
             }
-            case 10:
-            {
-                // clock
+            case 10: // clock
                 synchronized( m_timers )
                 {
                     return new Object[] { m_clock * 0.05 };
                 }
-            }
             case 11:
             {
                 // time
                 String param = optString( args, 0, "ingame" );
-                switch( param )
+                switch( param.toLowerCase( Locale.ROOT ) )
                 {
                     case "utc":
                     {
@@ -326,7 +311,7 @@ public class OSAPI implements ILuaAPI
             {
                 // day
                 String param = optString( args, 0, "ingame" );
-                switch( param )
+                switch( param.toLowerCase( Locale.ROOT ) )
                 {
                     case "utc":
                     {
@@ -356,10 +341,7 @@ public class OSAPI implements ILuaAPI
                 int token = getInt( args, 0 );
                 synchronized( m_timers )
                 {
-                    if( m_timers.containsKey( token ) )
-                    {
-                        m_timers.remove( token );
-                    }
+                    m_timers.remove( token );
                 }
                 return null;
             }
@@ -369,10 +351,7 @@ public class OSAPI implements ILuaAPI
                 int token = getInt( args, 0 );
                 synchronized( m_alarms )
                 {
-                    if( m_alarms.containsKey( token ) )
-                    {
-                        m_alarms.remove( token );
-                    }
+                    m_alarms.remove( token );
                 }
                 return null;
             }
@@ -380,7 +359,7 @@ public class OSAPI implements ILuaAPI
             {
                 // epoch
                 String param = optString( args, 0, "ingame" );
-                switch( param )
+                switch( param.toLowerCase( Locale.ROOT ) )
                 {
                     case "utc":
                     {
@@ -407,9 +386,7 @@ public class OSAPI implements ILuaAPI
                 }
             }
             default:
-            {
                 return null;
-            }
         }
     }
 

src/main/java/dan200/computercraft/core/apis/PeripheralAPI.java

@@ -12,9 +12,7 @@ import dan200.computercraft.api.lua.ILuaAPI;
 import dan200.computercraft.api.lua.ILuaContext;
 import dan200.computercraft.api.lua.LuaException;
 import dan200.computercraft.api.peripheral.IPeripheral;
-import dan200.computercraft.core.computer.Computer;
-import dan200.computercraft.core.computer.ComputerThread;
-import dan200.computercraft.core.computer.ITask;
+import dan200.computercraft.core.computer.ComputerSide;
 import dan200.computercraft.core.tracking.TrackingField;
 
 import javax.annotation.Nonnull;
@@ -47,8 +45,8 @@ public class PeripheralAPI implements ILuaAPI, IAPIEnvironment.IPeripheralChange
 
             m_type = peripheral.getType();
             m_methods = peripheral.getMethodNames();
-            assert (m_type != null);
-            assert (m_methods != null);
+            assert m_type != null;
+            assert m_methods != null;
 
             m_methodMap = new HashMap<>();
             for( int i = 0; i < m_methods.length; i++ )
@@ -231,9 +229,9 @@ public class PeripheralAPI implements ILuaAPI, IAPIEnvironment.IPeripheralChange
     private final PeripheralWrapper[] m_peripherals;
     private boolean m_running;
 
-    public PeripheralAPI( IAPIEnvironment _environment )
+    public PeripheralAPI( IAPIEnvironment environment )
     {
-        m_environment = _environment;
+        m_environment = environment;
         m_environment.setPeripheralChangeListener( this );
 
         m_peripherals = new PeripheralWrapper[6];
@@ -248,76 +246,33 @@ public class PeripheralAPI implements ILuaAPI, IAPIEnvironment.IPeripheralChange
     // IPeripheralChangeListener
 
     @Override
-    public void onPeripheralChanged( int side, IPeripheral newPeripheral )
+    public void onPeripheralChanged( ComputerSide side, IPeripheral newPeripheral )
     {
         synchronized( m_peripherals )
         {
-            if( m_peripherals[side] != null )
+            int index = side.ordinal();
+            if( m_peripherals[index] != null )
             {
                 // Queue a detachment
-                final PeripheralWrapper wrapper = m_peripherals[side];
-                ComputerThread.queueTask( new ITask()
-                {
-                    @Override
-                    public Computer getOwner()
-                    {
-                        return m_environment.getComputer();
-                    }
-
-                    @Override
-                    public void execute()
-                    {
-                        synchronized( m_peripherals )
-                        {
-                            if( wrapper.isAttached() )
-                            {
-                                wrapper.detach();
-                            }
-                        }
-                    }
-                }, null );
+                final PeripheralWrapper wrapper = m_peripherals[index];
+                if( wrapper.isAttached() ) wrapper.detach();
 
                 // Queue a detachment event
-                m_environment.queueEvent( "peripheral_detach", new Object[] { Computer.s_sideNames[side] } );
+                m_environment.queueEvent( "peripheral_detach", new Object[] { side.getName() } );
             }
 
             // Assign the new peripheral
-            if( newPeripheral != null )
-            {
-                m_peripherals[side] = new PeripheralWrapper( newPeripheral, Computer.s_sideNames[side] );
-            }
-            else
-            {
-                m_peripherals[side] = null;
-            }
+            m_peripherals[index] = newPeripheral == null ? null
+                : new PeripheralWrapper( newPeripheral, side.getName() );
 
-            if( m_peripherals[side] != null )
+            if( m_peripherals[index] != null )
             {
                 // Queue an attachment
-                final PeripheralWrapper wrapper = m_peripherals[side];
-                ComputerThread.queueTask( new ITask()
-                {
-                    @Override
-                    public Computer getOwner()
-                    {
-                        return m_environment.getComputer();
-                    }
-
-                    @Override
-                    public void execute()
-                    {
-                        synchronized( m_peripherals )
-                        {
-                            if( m_running && !wrapper.isAttached() )
-                            {
-                                wrapper.attach();
-                            }
-                        }
-                    }
-                }, null );
+                final PeripheralWrapper wrapper = m_peripherals[index];
+                if( m_running && !wrapper.isAttached() ) wrapper.attach();
 
                 // Queue an attachment event
-                m_environment.queueEvent( "peripheral", new Object[] { Computer.s_sideNames[side] } );
+                m_environment.queueEvent( "peripheral", new Object[] { side.getName() } );
             }
         }
     }
@@ -341,10 +296,7 @@ public class PeripheralAPI implements ILuaAPI, IAPIEnvironment.IPeripheralChange
             for( int i = 0; i < 6; i++ )
             {
                 PeripheralWrapper wrapper = m_peripherals[i];
-                if( wrapper != null && !wrapper.isAttached() )
-                {
-                    wrapper.attach();
-                }
+                if( wrapper != null && !wrapper.isAttached() ) wrapper.attach();
             }
         }
     }
@@ -387,16 +339,13 @@ public class PeripheralAPI implements ILuaAPI, IAPIEnvironment.IPeripheralChange
             {
                 // isPresent
                 boolean present = false;
-                int side = parseSide( args );
-                if( side >= 0 )
+                ComputerSide side = ComputerSide.valueOfInsensitive( getString( args, 0 ) );
+                if( side != null )
                 {
                     synchronized( m_peripherals )
                     {
-                        PeripheralWrapper p = m_peripherals[side];
-                        if( p != null )
-                        {
-                            present = true;
-                        }
+                        PeripheralWrapper p = m_peripherals[side.ordinal()];
+                        if( p != null ) present = true;
                     }
                 }
                 return new Object[] { present };
@@ -404,21 +353,14 @@ public class PeripheralAPI implements ILuaAPI, IAPIEnvironment.IPeripheralChange
             case 1:
             {
                 // getType
-                String type = null;
-                int side = parseSide( args );
-                if( side >= 0 )
+                ComputerSide side = ComputerSide.valueOfInsensitive( getString( args, 0 ) );
+                if( side != null )
                 {
+                    String type = null;
                     synchronized( m_peripherals )
                     {
-                        PeripheralWrapper p = m_peripherals[side];
-                        if( p != null )
-                        {
-                            type = p.getType();
-                        }
-                    }
-                    if( type != null )
-                    {
-                        return new Object[] { type };
+                        PeripheralWrapper p = m_peripherals[side.ordinal()];
+                        if( p != null ) return new Object[] { p.getType() };
                     }
                 }
                 return null;
@@ -427,12 +369,12 @@ public class PeripheralAPI implements ILuaAPI, IAPIEnvironment.IPeripheralChange
             {
                 // getMethods
                 String[] methods = null;
-                int side = parseSide( args );
-                if( side >= 0 )
+                ComputerSide side = ComputerSide.valueOfInsensitive( getString( args, 0 ) );
+                if( side != null )
                 {
                     synchronized( m_peripherals )
                     {
-                        PeripheralWrapper p = m_peripherals[side];
+                        PeripheralWrapper p = m_peripherals[side.ordinal()];
                         if( p != null )
                         {
                             methods = p.getMethods();
@@ -453,16 +395,16 @@ public class PeripheralAPI implements ILuaAPI, IAPIEnvironment.IPeripheralChange
             case 3:
             {
                 // call
-                int side = parseSide( args );
+                ComputerSide side = ComputerSide.valueOfInsensitive( getString( args, 0 ) );
                 String methodName = getString( args, 1 );
                 Object[] methodArgs = Arrays.copyOfRange( args, 2, args.length );
 
-                if( side >= 0 )
+                if( side != null )
                 {
                     PeripheralWrapper p;
                     synchronized( m_peripherals )
                     {
-                        p = m_peripherals[side];
+                        p = m_peripherals[side.ordinal()];
                     }
                     if( p != null )
                     {
@@ -472,24 +414,7 @@ public class PeripheralAPI implements ILuaAPI, IAPIEnvironment.IPeripheralChange
                 throw new LuaException( "No peripheral attached" );
             }
             default:
-            {
                 return null;
-            }
         }
     }
-
-    // Privates
-
-    private int parseSide( Object[] args ) throws LuaException
-    {
-        String side = getString( args, 0 );
-        for( int n = 0; n < Computer.s_sideNames.length; n++ )
-        {
-            if( side.equals( Computer.s_sideNames[n] ) )
-            {
-                return n;
-            }
-        }
-        return -1;
-    }
 }

src/main/java/dan200/computercraft/core/apis/RedstoneAPI.java

@@ -9,7 +9,7 @@ package dan200.computercraft.core.apis;
 import dan200.computercraft.api.lua.ILuaAPI;
 import dan200.computercraft.api.lua.ILuaContext;
 import dan200.computercraft.api.lua.LuaException;
-import dan200.computercraft.core.computer.Computer;
+import dan200.computercraft.core.computer.ComputerSide;
 
 import javax.annotation.Nonnull;
 import java.util.HashMap;
@@ -65,65 +65,49 @@ public class RedstoneAPI implements ILuaAPI
             {
                 // getSides
                 Map<Object, Object> table = new HashMap<>();
-                for( int i = 0; i < Computer.s_sideNames.length; i++ )
+                for( int i = 0; i < ComputerSide.NAMES.length; i++ )
                 {
-                    table.put( i + 1, Computer.s_sideNames[i] );
+                    table.put( i + 1, ComputerSide.NAMES[i] );
                 }
                 return new Object[] { table };
             }
             case 1:
             {
                 // setOutput
-                int side = parseSide( args );
+                ComputerSide side = parseSide( args );
                 boolean output = getBoolean( args, 1 );
                 m_environment.setOutput( side, output ? 15 : 0 );
                 return null;
             }
-            case 2:
-            {
-                // getOutput
-                int side = parseSide( args );
-                return new Object[] { m_environment.getOutput( side ) > 0 };
-            }
-            case 3:
-            {
-                // getInput
-                int side = parseSide( args );
-                return new Object[] { m_environment.getInput( side ) > 0 };
-            }
+            case 2: // getOutput
+                return new Object[] { m_environment.getOutput( parseSide( args ) ) > 0 };
+            case 3: // getInput
+                return new Object[] { m_environment.getInput( parseSide( args ) ) > 0 };
             case 4:
             {
                 // setBundledOutput
-                int side = parseSide( args );
+                ComputerSide side = parseSide( args );
                 int output = getInt( args, 1 );
                 m_environment.setBundledOutput( side, output );
                 return null;
             }
-            case 5:
-            {
-                // getBundledOutput
-                int side = parseSide( args );
-                return new Object[] { m_environment.getBundledOutput( side ) };
-            }
-            case 6:
-            {
-                // getBundledInput
-                int side = parseSide( args );
-                return new Object[] { m_environment.getBundledInput( side ) };
-            }
+            case 5: // getBundledOutput
+                return new Object[] { m_environment.getBundledOutput( parseSide( args ) ) };
+            case 6: // getBundledInput
+                return new Object[] { m_environment.getBundledInput( parseSide( args ) ) };
             case 7:
             {
                 // testBundledInput
-                int side = parseSide( args );
+                ComputerSide side = parseSide( args );
                 int mask = getInt( args, 1 );
                 int input = m_environment.getBundledInput( side );
-                return new Object[] { ((input & mask) == mask) };
+                return new Object[] { (input & mask) == mask };
             }
             case 8:
             case 9:
             {
                 // setAnalogOutput/setAnalogueOutput
-                int side = parseSide( args );
+                ComputerSide side = parseSide( args );
                 int output = getInt( args, 1 );
                 if( output < 0 || output > 15 )
                 {
@@ -133,36 +117,20 @@ public class RedstoneAPI implements ILuaAPI
                 return null;
             }
             case 10:
-            case 11:
-            {
-                // getAnalogOutput/getAnalogueOutput
-                int side = parseSide( args );
-                return new Object[] { m_environment.getOutput( side ) };
-            }
+            case 11: // getAnalogOutput/getAnalogueOutput
+                return new Object[] { m_environment.getOutput( parseSide( args ) ) };
             case 12:
-            case 13:
-            {
-                // getAnalogInput/getAnalogueInput
-                int side = parseSide( args );
-                return new Object[] { m_environment.getInput( side ) };
-            }
+            case 13: // getAnalogInput/getAnalogueInput
+                return new Object[] { m_environment.getInput( parseSide( args ) ) };
             default:
-            {
                 return null;
-            }
         }
     }
 
-    private int parseSide( Object[] args ) throws LuaException
+    private static ComputerSide parseSide( Object[] args ) throws LuaException
     {
-        String side = getString( args, 0 );
-        for( int n = 0; n < Computer.s_sideNames.length; n++ )
-        {
-            if( side.equals( Computer.s_sideNames[n] ) )
-            {
-                return n;
-            }
-        }
-        throw new LuaException( "Invalid side." );
+        ComputerSide side = ComputerSide.valueOfInsensitive( getString( args, 0 ) );
+        if( side == null ) throw new LuaException( "Invalid side." );
+        return side;
     }
 }

src/main/java/dan200/computercraft/core/apis/TermAPI.java

@@ -11,6 +11,7 @@ import dan200.computercraft.api.lua.ILuaContext;
 import dan200.computercraft.api.lua.LuaException;
 import dan200.computercraft.core.computer.IComputerEnvironment;
 import dan200.computercraft.core.terminal.Terminal;
+import dan200.computercraft.shared.util.Colour;
 import dan200.computercraft.shared.util.Palette;
 import org.apache.commons.lang3.ArrayUtils;
 
@@ -23,10 +24,10 @@ public class TermAPI implements ILuaAPI
     private final Terminal m_terminal;
     private final IComputerEnvironment m_environment;
 
-    public TermAPI( IAPIEnvironment _environment )
+    public TermAPI( IAPIEnvironment environment )
     {
-        m_terminal = _environment.getTerminal();
-        m_environment = _environment.getComputerEnvironment();
+        m_terminal = environment.getTerminal();
+        m_environment = environment.getComputerEnvironment();
     }
 
     @Override
@@ -65,6 +66,8 @@ public class TermAPI implements ILuaAPI
             "setPaletteColor",
             "getPaletteColour",
             "getPaletteColor",
+            "nativePaletteColour",
+            "nativePaletteColor",
             "getCursorBlink",
         };
     }
@@ -108,16 +111,7 @@ public class TermAPI implements ILuaAPI
             case 0:
             {
                 // write
-                String text;
-                if( args.length > 0 && args[0] != null )
-                {
-                    text = args[0].toString();
-                }
-                else
-                {
-                    text = "";
-                }
-
+                String text = args.length > 0 && args[0] != null ? args[0].toString() : "";
                 synchronized( m_terminal )
                 {
                     m_terminal.write( text );
@@ -178,24 +172,18 @@ public class TermAPI implements ILuaAPI
                 }
                 return new Object[] { width, height };
             }
-            case 6:
-            {
-                // clear
+            case 6: // clear
                 synchronized( m_terminal )
                 {
                     m_terminal.clear();
                 }
                 return null;
-            }
-            case 7:
-            {
-                // clearLine
+            case 7: // clearLine
                 synchronized( m_terminal )
                 {
                     m_terminal.clearLine();
                 }
                 return null;
-            }
             case 8:
             case 9:
             {
@@ -219,23 +207,14 @@ public class TermAPI implements ILuaAPI
                 return null;
             }
             case 12:
-            case 13:
-            {
-                // isColour/isColor
+            case 13: // isColour/isColor
                 return new Object[] { m_environment.isColour() };
-            }
             case 14:
-            case 15:
-            {
-                // getTextColour/getTextColor
+            case 15: // getTextColour/getTextColor
                 return encodeColour( m_terminal.getTextColour() );
-            }
             case 16:
-            case 17:
-            {
-                // getBackgroundColour/getBackgroundColor
+            case 17: // getBackgroundColour/getBackgroundColor
                 return encodeColour( m_terminal.getBackgroundColour() );
-            }
             case 18:
             {
                 // blit
@@ -289,12 +268,23 @@ public class TermAPI implements ILuaAPI
                 return null;
             }
             case 23:
+            case 24:
+            {
+                // nativePaletteColour/nativePaletteColor
+                int colour = 15 - parseColour( args );
+                Colour c = Colour.fromInt( colour );
+
+                float[] rgb = c.getRGB();
+
+                Object[] rgbObj = new Object[rgb.length];
+                for( int i = 0; i < rgbObj.length; ++i ) rgbObj[i] = rgb[i];
+                return rgbObj;
+            }
+            case 25:
                 // getCursorBlink
                 return new Object[] { m_terminal.getCursorBlink() };
             default:
-            {
                 return null;
-            }
         }
     }
 

src/main/java/dan200/computercraft/core/apis/handles/ArrayByteChannel.java

@@ -6,13 +6,11 @@
 
 package dan200.computercraft.core.apis.handles;
 
-import com.google.common.base.Preconditions;
-
-import java.io.IOException;
 import java.nio.ByteBuffer;
 import java.nio.channels.ClosedChannelException;
 import java.nio.channels.NonWritableChannelException;
 import java.nio.channels.SeekableByteChannel;
+import java.util.Objects;
 
 /**
  * A seekable, readable byte channel which is backed by a simple byte array.
@@ -30,10 +28,10 @@ public class ArrayByteChannel implements SeekableByteChannel
     }
 
     @Override
-    public int read( ByteBuffer destination ) throws IOException
+    public int read( ByteBuffer destination ) throws ClosedChannelException
     {
         if( closed ) throw new ClosedChannelException();
-        Preconditions.checkNotNull( destination, "destination" );
+        Objects.requireNonNull( destination, "destination" );
 
         if( position >= backing.length ) return -1;
 
@@ -44,21 +42,21 @@ public class ArrayByteChannel implements SeekableByteChannel
     }
 
     @Override
-    public int write( ByteBuffer src ) throws IOException
+    public int write( ByteBuffer src ) throws ClosedChannelException
     {
         if( closed ) throw new ClosedChannelException();
         throw new NonWritableChannelException();
     }
 
     @Override
-    public long position() throws IOException
+    public long position() throws ClosedChannelException
     {
         if( closed ) throw new ClosedChannelException();
         return position;
     }
 
     @Override
-    public SeekableByteChannel position( long newPosition ) throws IOException
+    public SeekableByteChannel position( long newPosition ) throws ClosedChannelException
     {
         if( closed ) throw new ClosedChannelException();
         if( newPosition < 0 || newPosition > Integer.MAX_VALUE )
@@ -70,14 +68,14 @@ public class ArrayByteChannel implements SeekableByteChannel
     }
 
     @Override
-    public long size() throws IOException
+    public long size() throws ClosedChannelException
     {
         if( closed ) throw new ClosedChannelException();
         return backing.length;
     }
 
     @Override
-    public SeekableByteChannel truncate( long size ) throws IOException
+    public SeekableByteChannel truncate( long size ) throws ClosedChannelException
     {
         if( closed ) throw new ClosedChannelException();
         throw new NonWritableChannelException();

src/main/java/dan200/computercraft/core/apis/handles/BinaryReadableHandle.java

@@ -38,8 +38,8 @@ public class BinaryReadableHandle extends HandleGeneric
     public BinaryReadableHandle( ReadableByteChannel channel, Closeable closeable )
     {
         super( closeable );
-        this.m_reader = channel;
-        this.m_seekable = asSeekable( channel );
+        m_reader = channel;
+        m_seekable = asSeekable( channel );
     }
 
     public BinaryReadableHandle( ReadableByteChannel channel )
@@ -169,27 +169,42 @@ public class BinaryReadableHandle extends HandleGeneric
                 {
                     ByteArrayOutputStream stream = new ByteArrayOutputStream();
 
-                    boolean readAnything = false;
+                    boolean readAnything = false, readRc = false;
                     while( true )
                     {
                         single.clear();
-                        int r = m_reader.read( single );
-                        if( r == -1 ) break;
+                        int read = m_reader.read( single );
+                        if( read <= 0 )
+                        {
+                            // Nothing else to read, and we saw no \n. Return the array. If we saw a \r, then add it
+                            // back.
+                            if( readRc ) stream.write( '\r' );
+                            return readAnything ? new Object[] { stream.toByteArray() } : null;
+                        }
 
                         readAnything = true;
-                        byte b = single.get( 0 );
-                        if( b == '\n' )
+
+                        byte chr = single.get( 0 );
+                        if( chr == '\n' )
                         {
-                            if( withTrailing ) stream.write( b );
-                            break;
+                            if( withTrailing )
+                            {
+                                if( readRc ) stream.write( '\r' );
+                                stream.write( chr );
+                            }
+                            return new Object[] { stream.toByteArray() };
                         }
                         else
                         {
-                            stream.write( b );
+                            // We want to skip \r\n, but obviously need to include cases where \r is not followed by \n.
+                            // Note, this behaviour is non-standard compliant (strictly speaking we should have no
+                            // special logic for \r), but we preserve compatibility with EncodedReadableHandle and
+                            // previous behaviour of the io library.
+                            if( readRc ) stream.write( '\r' );
+                            readRc = chr == '\r';
+                            if( !readRc ) stream.write( chr );
                         }
                     }
-
-                    return readAnything ? new Object[] { stream.toByteArray() } : null;
                 }
                 catch( IOException e )
                 {

src/main/java/dan200/computercraft/core/apis/handles/BinaryWritableHandle.java

@@ -32,8 +32,8 @@ public class BinaryWritableHandle extends HandleGeneric
     public BinaryWritableHandle( WritableByteChannel channel, Closeable closeable )
     {
         super( closeable );
-        this.m_writer = channel;
-        this.m_seekable = asSeekable( channel );
+        m_writer = channel;
+        m_seekable = asSeekable( channel );
     }
 
     public BinaryWritableHandle( WritableByteChannel channel )

src/main/java/dan200/computercraft/core/apis/handles/EncodedReadableHandle.java

@@ -32,7 +32,7 @@ public class EncodedReadableHandle extends HandleGeneric
     public EncodedReadableHandle( @Nonnull BufferedReader reader, @Nonnull Closeable closable )
     {
         super( closable );
-        this.m_reader = reader;
+        m_reader = reader;
     }
 
     public EncodedReadableHandle( @Nonnull BufferedReader reader )
@@ -84,7 +84,7 @@ public class EncodedReadableHandle extends HandleGeneric
                 checkOpen();
                 try
                 {
-                    StringBuilder result = new StringBuilder( "" );
+                    StringBuilder result = new StringBuilder();
                     String line = m_reader.readLine();
                     while( line != null )
                     {

src/main/java/dan200/computercraft/core/apis/handles/EncodedWritableHandle.java

@@ -27,7 +27,7 @@ public class EncodedWritableHandle extends HandleGeneric
     public EncodedWritableHandle( @Nonnull BufferedWriter writer, @Nonnull Closeable closable )
     {
         super( closable );
-        this.m_writer = writer;
+        m_writer = writer;
     }
 
     public EncodedWritableHandle( @Nonnull BufferedWriter writer )

src/main/java/dan200/computercraft/core/apis/handles/HandleGeneric.java

@@ -26,7 +26,7 @@ public abstract class HandleGeneric implements ILuaObject
 
     protected HandleGeneric( @Nonnull Closeable closable )
     {
-        this.m_closable = closable;
+        m_closable = closable;
     }
 
     protected void checkOpen() throws LuaException
@@ -46,7 +46,7 @@ public abstract class HandleGeneric implements ILuaObject
      *
      * @param channel The channel to seek in
      * @param args    The Lua arguments to process, like Lua's {@code file:seek}.
-     * @return The new position of the file, or null if some error occured.
+     * @return The new position of the file, or null if some error occurred.
      * @throws LuaException If the arguments were invalid
      * @see <a href="https://www.lua.org/manual/5.1/manual.html#pdf-file:seek">{@code file:seek} in the Lua manual.</a>
      */

src/main/java/dan200/computercraft/core/apis/http/CheckUrl.java

@@ -31,7 +31,7 @@ public class CheckUrl extends Resource<CheckUrl>
         super( limiter );
         this.environment = environment;
         this.address = address;
-        this.host = uri.getHost();
+        host = uri.getHost();
     }
 
     public void run()

src/main/java/dan200/computercraft/core/apis/http/Resource.java

@@ -140,6 +140,6 @@ public abstract class Resource<T extends Resource<T>> implements Closeable
     public static void cleanup()
     {
         Reference<?> reference;
-        while( (reference = QUEUE.poll()) != null ) ((CloseReference) reference).resource.close();
+        while( (reference = QUEUE.poll()) != null ) ((CloseReference<?>) reference).resource.close();
     }
 }