Adds support for autosave with the download saver

Also does some reorganisation of control panel to move “saving” related
settings together, and expose a UI for savers to plug into.

Fixes #2741

core/language/en-GB/ControlPanel.multids

@@ -80,10 +80,17 @@ Plugins/Reinstall/Caption: reinstall
 Plugins/Themes/Caption: Themes
 Plugins/Themes/Hint: Theme plugins
 Saving/Caption: Saving
-Saving/Heading: Saving
+Saving/DownloadSaver/AutoSave/Description: Permit automatic saving for the download saver
+Saving/DownloadSaver/AutoSave/Hint: Enable Autosave for Download Saver
+Saving/DownloadSaver/Caption: Download Saver
+Saving/DownloadSaver/Hint: These settings apply to the HTML5-compatible download saver
+Saving/General/Caption: General
+Saving/General/Hint: These settings apply to all the loaded savers
+Saving/Hint: Settings used for saving the entire TiddlyWiki as a single file via a saver module
 Saving/TiddlySpot/Advanced/Heading: Advanced Settings
 Saving/TiddlySpot/BackupDir: Backup Directory
 Saving/TiddlySpot/Backups: Backups
+Saving/TiddlySpot/Caption: ~TiddlySpot Saver
 Saving/TiddlySpot/Description: These settings are only used when saving to http://tiddlyspot.com or a compatible remote server
 Saving/TiddlySpot/Filename: Upload Filename
 Saving/TiddlySpot/Heading: ~TiddlySpot
@@ -95,7 +102,7 @@ Saving/TiddlySpot/UserName: Wiki Name
 Settings/AutoSave/Caption: Autosave
 Settings/AutoSave/Disabled/Description: Do not save changes automatically
 Settings/AutoSave/Enabled/Description: Save changes automatically
-Settings/AutoSave/Hint: Automatically save changes during editing
+Settings/AutoSave/Hint: Attempt to automatically save changes during editing when using a supporting saver
 Settings/CamelCase/Caption: Camel Case Wiki Links
 Settings/CamelCase/Hint: You can globally disable automatic linking of ~CamelCase phrases. Requires reload to take effect
 Settings/CamelCase/Description: Enable automatic ~CamelCase linking

core/modules/savers/download.js

@@ -55,10 +55,19 @@ Information about this saver
 */
 DownloadSaver.prototype.info = {
 	name: "download",
-	priority: 100,
+	priority: 100
-	capabilities: ["save", "download"]
 };
 
+Object.defineProperty(DownloadSaver.prototype.info, "capabilities", {
+	get: function() {
+		var capabilities = ["save", "download"];
+		if(($tw.wiki.getTextReference("$:/config/DownloadSaver/AutoSave") || "").toLowerCase() === "yes") {
+			capabilities.push("autosave");
+		}
+		return capabilities;
+	}
+});
+
 /*
 Static method that returns true if this saver is capable of working
 */

core/ui/ControlPanel/Saving.tid

@@ -2,35 +2,8 @@ title: $:/core/ui/ControlPanel/Saving
 tags: $:/tags/ControlPanel
 caption: {{$:/language/ControlPanel/Saving/Caption}}
 
-\define lingo-base() $:/language/ControlPanel/Saving/
+{{$:/language/ControlPanel/Saving/Hint}}
-\define backupURL()
-http://$(userName)$.tiddlyspot.com/backup/
-\end
-\define backupLink()
-<$reveal type="nomatch" state="$:/UploadName" text="">
-<$set name="userName" value={{$:/UploadName}}>
-<$reveal type="match" state="$:/UploadURL" text="">
-<<backupURL>>
-</$reveal>
-<$reveal type="nomatch" state="$:/UploadURL" text="">
-<$macrocall $name=resolvePath source={{$:/UploadBackupDir}} root={{$:/UploadURL}}>>
-</$reveal>
-</$set>
-</$reveal>
-\end
-! <<lingo TiddlySpot/Heading>>
 
-<<lingo TiddlySpot/Description>>
+<div class="tc-control-panel">
-
+<<tabs "[all[shadows+tiddlers]tag[$:/tags/ControlPanel/Saving]!has[draft.of]]" "$:/core/ui/ControlPanel/Saving/General">>
-|<<lingo TiddlySpot/UserName>> |<$edit-text tiddler="$:/UploadName" default="" tag="input"/> |
+</div>
-|<<lingo TiddlySpot/Password>> |<$password name="upload"/> |
-|<<lingo TiddlySpot/Backups>> |<<backupLink>> |
-
-''<<lingo TiddlySpot/Advanced/Heading>>''
-
-|<<lingo TiddlySpot/ServerURL>>  |<$edit-text tiddler="$:/UploadURL" default="" tag="input"/> |
-|<<lingo TiddlySpot/Filename>> |<$edit-text tiddler="$:/UploadFilename" default="index.html" tag="input"/> |
-|<<lingo TiddlySpot/UploadDir>> |<$edit-text tiddler="$:/UploadDir" default="." tag="input"/> |
-|<<lingo TiddlySpot/BackupDir>> |<$edit-text tiddler="$:/UploadBackupDir" default="." tag="input"/> |
-
-<<lingo TiddlySpot/Hint>>

core/ui/ControlPanel/Saving/DownloadSaver.tid

@@ -0,0 +1,11 @@
+title: $:/core/ui/ControlPanel/Saving/DownloadSaver
+tags: $:/tags/ControlPanel/Saving
+caption: {{$:/language/ControlPanel/Saving/DownloadSaver/Caption}}
+
+\define lingo-base() $:/language/ControlPanel/Saving/DownloadSaver/
+
+<<lingo Hint>>
+
+!! <$link to="$:/config/DownloadSaver/AutoSave"><<lingo AutoSave/Hint>></$link>
+
+<$checkbox tiddler="$:/config/DownloadSaver/AutoSave" field="text" checked="yes" unchecked="no" default="no"> <<lingo AutoSave/Description>> </$checkbox>

core/ui/ControlPanel/Saving/General.tid

@@ -0,0 +1,16 @@
+title: $:/core/ui/ControlPanel/Saving/General
+tags: $:/tags/ControlPanel/Saving
+caption: {{$:/language/ControlPanel/Saving/General/Caption}}
+list-before:
+
+\define lingo-base() $:/language/ControlPanel/Settings/
+
+{{$:/language/ControlPanel/Saving/General/Hint}}
+
+!! <$link to="$:/config/AutoSave"><<lingo AutoSave/Caption>></$link>
+
+<<lingo AutoSave/Hint>>
+
+<$radio tiddler="$:/config/AutoSave" value="yes"> <<lingo AutoSave/Enabled/Description>> </$radio>
+
+<$radio tiddler="$:/config/AutoSave" value="no"> <<lingo AutoSave/Disabled/Description>> </$radio>

core/ui/ControlPanel/Saving/TiddlySpot.tid

@@ -0,0 +1,36 @@
+title: $:/core/ui/ControlPanel/Saving/TiddlySpot
+tags: $:/tags/ControlPanel/Saving
+caption: {{$:/language/ControlPanel/Saving/TiddlySpot/Caption}}
+
+\define lingo-base() $:/language/ControlPanel/Saving/TiddlySpot/
+
+\define backupURL()
+http://$(userName)$.tiddlyspot.com/backup/
+\end
+\define backupLink()
+<$reveal type="nomatch" state="$:/UploadName" text="">
+<$set name="userName" value={{$:/UploadName}}>
+<$reveal type="match" state="$:/UploadURL" text="">
+<<backupURL>>
+</$reveal>
+<$reveal type="nomatch" state="$:/UploadURL" text="">
+<$macrocall $name=resolvePath source={{$:/UploadBackupDir}} root={{$:/UploadURL}}>>
+</$reveal>
+</$set>
+</$reveal>
+\end
+
+<<lingo Description>>
+
+|<<lingo UserName>> |<$edit-text tiddler="$:/UploadName" default="" tag="input"/> |
+|<<lingo Password>> |<$password name="upload"/> |
+|<<lingo Backups>> |<<backupLink>> |
+
+''<<lingo Advanced/Heading>>''
+
+|<<lingo ServerURL>>  |<$edit-text tiddler="$:/UploadURL" default="" tag="input"/> |
+|<<lingo Filename>> |<$edit-text tiddler="$:/UploadFilename" default="index.html" tag="input"/> |
+|<<lingo UploadDir>> |<$edit-text tiddler="$:/UploadDir" default="." tag="input"/> |
+|<<lingo BackupDir>> |<$edit-text tiddler="$:/UploadBackupDir" default="." tag="input"/> |
+
+<<lingo TiddlySpot/Hint>>

core/ui/ControlPanel/Settings/AutoSave.tid

@@ -1,11 +0,0 @@
-title: $:/core/ui/ControlPanel/Settings/AutoSave
-tags: $:/tags/ControlPanel/Settings
-caption: {{$:/language/ControlPanel/Settings/AutoSave/Caption}}
-
-\define lingo-base() $:/language/ControlPanel/Settings/AutoSave/
-
-<$link to="$:/config/AutoSave"><<lingo Hint>></$link>
-
-<$radio tiddler="$:/config/AutoSave" value="yes"> <<lingo Enabled/Description>> </$radio>
-
-<$radio tiddler="$:/config/AutoSave" value="no"> <<lingo Disabled/Description>> </$radio>

core/wiki/config/DownloadSaverAutoSave.tid

@@ -0,0 +1,3 @@
+title: $:/config/DownloadSaver/AutoSave
+
+no