Added first version of QR code generator plugin

editions/prerelease/tiddlywiki.info

@@ -10,7 +10,8 @@
 		"tiddlywiki/powered-by-tiddlywiki",
 		"tiddlywiki/internals",
 		"tiddlywiki/highlight",
-		"tiddlywiki/markdown"
+		"tiddlywiki/markdown",
+		"tiddlywiki/qrcode"
 	],
 	"themes": [
 		"tiddlywiki/vanilla",

plugins/tiddlywiki/qrcode/MakeContactQR.tid

@@ -0,0 +1,27 @@
+title: $:/plugins/tiddlywiki/qrcode/MakeContactQR
+tags: $:/tags/MakeQR
+caption: Contact
+
+\define wifi-url()
+WIFI:wifi name;T:WPA;S:SSID;P:password;
+\end
+
+\define image(firstname,lastname,address,tel,email)
+<img src=<<makeqr text:"""MECARD:N:$lastname$,$firstname$;ADR:$address$;TEL:$tel$;EMAIL:$email$;;""" size:"350">>/>
+\end
+
+! Enter the contact details
+
+First name: <$edit-text tiddler="$:/config/plugins/tiddlywiki/qrcode/contact/firstname" tag="input" default=""/>
+
+Last name: <$edit-text tiddler="$:/config/plugins/tiddlywiki/qrcode/contact/lastname" tag="input" default=""/>
+
+Address: <$edit-text tiddler="$:/config/plugins/tiddlywiki/qrcode/contact/address" tag="input" default=""/>
+
+Telephone: <$edit-text tiddler="$:/config/plugins/tiddlywiki/qrcode/contact/tel" tag="input" default=""/>
+
+Email: <$edit-text tiddler="$:/config/plugins/tiddlywiki/qrcode/contact/email" tag="input" default=""/>
+
+! Here is your QR code
+
+<$macrocall $name="image" firstname={{$:/config/plugins/tiddlywiki/qrcode/contact/firstname}} lastname={{$:/config/plugins/tiddlywiki/qrcode/contact/lastname}} address={{$:/config/plugins/tiddlywiki/qrcode/contact/address}} tel={{$:/config/plugins/tiddlywiki/qrcode/contact/tel}} email={{$:/config/plugins/tiddlywiki/qrcode/contact/email}}/>

plugins/tiddlywiki/qrcode/MakeGenericQR.tid

@@ -0,0 +1,15 @@
+title: $:/plugins/tiddlywiki/qrcode/MakeGenericQR
+tags: $:/tags/MakeQR
+caption: Generic
+
+\define image(content)
+<img src=<<makeqr text:"""$content$""" size:"350">>/>
+\end
+
+! Enter the details
+
+<$edit-text tiddler="$:/config/plugins/tiddlywiki/qrcode/generic" default="" class="tc-edit-texteditor"/>
+
+! Here is your QR code
+
+<$macrocall $name="image" content={{$:/config/plugins/tiddlywiki/qrcode/generic}}/>

plugins/tiddlywiki/qrcode/MakeWifiQR.tid

@@ -0,0 +1,30 @@
+title: $:/plugins/tiddlywiki/qrcode/MakeWifiQR
+tags: $:/tags/MakeQR
+caption: Wifi
+
+\define wifi-url()
+WIFI:wifi name;T:WPA;S:SSID;P:password;
+\end
+
+\define image(network,encryption,ssid,password)
+<img src=<<makeqr text:"""WIFI:$network$;T:$encryption$;S:$ssid$;P:$password$;""" size:"350">>/>
+\end
+
+! Enter the details of your wifi network
+
+Name of wifi network: <$edit-text tiddler="$:/config/plugins/tiddlywiki/qrcode/wifi/network" tag="input" default=""/>
+
+Encryption: <$select tiddler="$:/config/plugins/tiddlywiki/qrcode/wifi/encryption" default="none">
+<option value="none">None</option>
+<option value="WEP">WEP</option>
+<option value="WPA">WPA</option>
+<option value="WPA2">WPA2</option>
+</$select>
+
+SSID: <$edit-text tiddler="$:/config/plugins/tiddlywiki/qrcode/wifi/ssid" tag="input" default=""/>
+
+Password: <$edit-text tiddler="$:/config/plugins/tiddlywiki/qrcode/wifi/password" tag="input" default=""/>
+
+! Here is your QR code
+
+<$macrocall $name="image" network={{$:/config/plugins/tiddlywiki/qrcode/wifi/network}} encryption={{$:/config/plugins/tiddlywiki/qrcode/wifi/encryption}} ssid={{$:/config/plugins/tiddlywiki/qrcode/wifi/ssid}} password={{$:/config/plugins/tiddlywiki/qrcode/wifi/password}}/>

plugins/tiddlywiki/qrcode/ViewToolbarButton/Button.tid

@@ -0,0 +1,53 @@
+title: $:/plugins/tiddlywiki/qrcode/ViewToolbarButton
+tags: $:/tags/ViewToolbar
+caption: {{$:/plugins/tiddlywiki/qrcode/icon}}
+short-caption: QR code
+description: Generate QR code for this tiddler
+
+<span class="tc-popup-keep">
+<$button popup=<<qualify "$:/state/popup/qrcode">> tooltip={{$:/plugins/tiddlywiki/qrcode/ViewToolbarButton!!description}} aria-label={{$:/plugins/tiddlywiki/qrcode/ViewToolbarButton!!short-caption}} class=<<tv-config-toolbar-class>> class=<<tv-config-toolbar-class>> selectedClass="tc-selected">
+<$list filter="[<tv-config-toolbar-icons>prefix[yes]]">
+{{$:/plugins/tiddlywiki/qrcode/icon}}
+</$list>
+<$list filter="[<tv-config-toolbar-text>prefix[yes]]">
+<span class="tc-btn-text"><$text text={{$:/plugins/tiddlywiki/qrcode/ViewToolbarButton!!short-caption}}/></span>
+</$list>
+</$button>
+</span>
+<$reveal state=<<qualify "$:/state/popup/qrcode">> type="popup" position="below" animate="yes">
+
+<div class="tc-drop-down">
+
+{{$:/plugins/tiddlywiki/qrcode/ViewToolbarButton||description}}
+
+<$set name="tv-config-toolbar-icons" value="yes">
+
+<$set name="tv-config-toolbar-text" value="yes">
+
+<$set name="tv-config-toolbar-class" value="tc-btn-invisible">
+
+<$set name="targetTiddler" value=<<currentTiddler>>>
+
+<$list filter="[all[shadows+tiddlers]tag[$:/tags/ViewToolbarButton/QRcode]!has[draft.of]]">
+
+<$button popup=<<qualify "$:/state/popup/qrcode/type">> class="tc-btn-invisible" selectedClass="tc-selected">
+
+<$action-sendmessage $message="tm-modal" $param=<<currentTiddler>> currentTiddler=<<targetTiddler>>/>
+
+<$transclude field="caption" mode="inline"/>
+
+</$button>
+
+</$list>
+
+</$set>
+
+</$set>
+
+</$set>
+
+</$set>
+
+</div>
+
+</$reveal>

plugins/tiddlywiki/qrcode/ViewToolbarButton/Raw.tid

@@ -0,0 +1,12 @@
+title: $:/plugins/tiddlywiki/qrcode/ViewToolbarButton/Raw
+tags: $:/tags/ViewToolbarButton/QRcode
+caption: Raw content of this tiddler
+subtitle: QR code of raw tiddler content
+
+\define image()
+<img src=<<makeqr text:"""$(content)$""" size:"350">>/>
+\end
+
+<$set name="content" value={{!!text}}>
+<<image>>
+</$set>

plugins/tiddlywiki/qrcode/ViewToolbarButton/Rendered.tid

@@ -0,0 +1,12 @@
+title: $:/plugins/tiddlywiki/qrcode/ViewToolbarButton/Rendered
+tags: $:/tags/ViewToolbarButton/QRcode
+caption: Rendered content of this tiddler
+subtitle: QR code of rendered tiddler content
+
+\define image()
+<img src=<<makeqr text:"""$(content)$""" size:"350">>/>
+\end
+
+<$wikify name="content" text={{!!text}} type="text" mode="block" output="formattedtext">
+<<image>>
+</$wikify>

plugins/tiddlywiki/qrcode/ViewToolbarButton/URL.tid

@@ -0,0 +1,14 @@
+title: $:/plugins/tiddlywiki/qrcode/ViewToolbarButton/URL
+tags: $:/tags/ViewToolbarButton/QRcode
+caption: URL of this tiddler
+subtitle: QR code of URL of this tiddler
+
+\define image()
+<img src=<<makeqr text:"""$(url)$#$(hash)$""" size:"350">>/>
+\end
+
+<$set name="url" value={{$:/info/url/full}}>
+<$set name="hash" filter="[<currentTiddler>encodeuricomponent[]]" select="0">
+<<image>>
+</$set>
+</$set>

plugins/tiddlywiki/qrcode/ViewToolbarButton/styles.tid

@@ -0,0 +1,9 @@
+title: $:/plugins/tiddlywiki/qrcode/styles
+tags: [[$:/tags/Stylesheet]]
+
+\rules only filteredtranscludeinline transcludeinline macrodef macrocallinline
+
+.tc-drop-down .tc-qrcode-drop-down img {
+	width: 100%;
+	height: 100%;
+}

plugins/tiddlywiki/qrcode/doc/examples.tid

@@ -0,0 +1,3 @@
+title: $:/plugins/tiddlywiki/qrcode/examples
+
+<<tabs "[all[shadows+tiddlers]tag[$:/tags/MakeQR]!has[draft.of]]" "$:/plugins/tiddlywiki/qrcode/MakeGenericQR">>

plugins/tiddlywiki/qrcode/doc/readme.tid

@@ -0,0 +1,13 @@
+title: $:/plugins/tiddlywiki/qrcode/readme
+
+The QR code plugin provides a macro that enables any text to be rendered as a [[QR code|https://en.wikipedia.org/wiki/QR_code]]. QR codes are a type of 2-dimensional bar code that encodes arbitrary data: text, numbers, links. QR code readers are available or built-in for smartphones, making them a convenient means to transfer information between devices
+
+The QR code plugin adds the following features to TiddlyWiki:
+
+* A new [[makeqr Macro]] that renders specified text as a QR code image that can be displayed or printed
+* A new toolbar button that can display several QR code renderings of the content of a tiddler:
+** Raw content
+** Rendered, formatted content
+** URL of tiddler
+
+The QR code plugin is based on the [[library qrcode.js by Zeno Zeng|https://github.com/zenozeng/node-yaqrcode]].

plugins/tiddlywiki/qrcode/doc/usage.tid

@@ -0,0 +1,24 @@
+title: $:/plugins/tiddlywiki/qrcode/usage
+
+! `makeqr` Macro
+
+The <<.def makeqr>> [[macro|Macros]] converts text data into an image of the corresponding QR code. The image is returned as [[base64-encoded data URI|https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URIs]].
+
+!! Parameters
+
+;text
+: The text to encode
+;size
+: The size of the image in pixels (defaults to 500)
+;errorCorrectLevel
+: Determines the amount of error correction applied to the image; see below (defaults to "M").
+;fallback
+: The fallback image to be returned in case of an error (see below)
+
+The conversion will fail if the text is too long and/or complex and the macro will return the provided fallback image. If no fallback image is provided then an error image is generated.
+
+The error correction level is a [[QR code feature|http://www.qrcode.com/en/about/error_correction.html]]:
+
+<<<
+QR Code has error correction capability to restore data if the code is dirty or damaged. ... Level Q or H may be selected for factory environment where QR Code get dirty, whereas Level L may be selected for clean environment with the large amount of data. Typically, Level M (15%) is most frequently selected.
+<<<

plugins/tiddlywiki/qrcode/files/LICENSE

@@ -0,0 +1,20 @@
+The MIT License (MIT)
+
+Copyright (c) 2013 Zeno Zeng
+
+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.

plugins/tiddlywiki/qrcode/files/README.md

@@ -0,0 +1,72 @@
+# node-yaqrcode
+
+Yet another node-qrcode Generator!
+
+This is a simple and pure javascript wrapper for the QR Code Generator from the d-project.
+
+No Canvas or Binary needed!
+
+Note:
+
+```
+The word 'QR Code' is registered trademark of
+DENSO WAVE INCORPORATED
+http://www.denso-wave.com/qrcode/faqpatent-e.html
+```
+
+## Overview
+
+- Pure Javascript and could work without any requiments
+
+- Use `RS_BLOCK_TABLE` from http://davidshimjs.github.io/qrcodejs/ to support typeNumber 40
+
+- Use the code from http://davidshimjs.github.io/qrcodejs/ to support UTF-8
+
+- Return a Base64 Data URI like this
+
+```
+data:image/gif;base64,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
+```
+
+## Usage
+
+```
+npm install yaqrcode
+```
+
+```javascript
+qrcode = require('yaqrcode');
+base64 = qrcode('hello world');
+```
+
+### custom size
+
+```javascript
+qrcode = require('yaqrcode');
+base64 = qrcode('hello world', {
+    size: 500
+});
+```
+
+## License
+
+The MIT License (MIT)
+
+Copyright (c) 2013,2015 Zeno Zeng
+
+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.

plugins/tiddlywiki/qrcode/files/tiddlywiki.files

@@ -0,0 +1,20 @@
+{
+	"tiddlers": [
+		{
+			"file": "qrcode.js",
+			"fields": {
+				"type": "application/javascript",
+				"title": "$:/plugins/tiddlywiki/qrcode/qrcode.js",
+				"module-type": "library"
+			},
+			"prefix": "",
+			"suffix": ""
+		},{
+			"file": "LICENSE",
+			"fields": {
+				"type": "text/plain",
+				"title": "$:/plugins/tiddlywiki/qrcode/license"
+			}
+		}
+	]
+}

plugins/tiddlywiki/qrcode/icon.tid

@@ -0,0 +1,24 @@
+title: $:/plugins/tiddlywiki/qrcode/icon
+tags: $:/tags/Image
+
+<svg class="tc-image-qrcode tc-image-button" viewBox="0 0 128 128" width="22pt" height="22pt">
+    <g fill-rule="evenodd">
+        <path d="M0,15.9969199 C0,7.16206498 7.16987059,0 15.9969199,0 L64.0030801,0 C72.837935,0 80,7.16987059 80,15.9969199 L80,64.0030801 C80,72.837935 72.8301294,80 64.0030801,80 L15.9969199,80 C7.16206498,80 0,72.8301294 0,64.0030801 L0,15.9969199 Z M16,22.0063866 C16,18.6891509 18.6835413,16 22.0063866,16 L57.9936134,16 C61.3108491,16 64,18.6835413 64,22.0063866 L64,57.9936134 C64,61.3108491 61.3164587,64 57.9936134,64 L22.0063866,64 C18.6891509,64 16,61.3164587 16,57.9936134 L16,22.0063866 Z M28,31.990053 C28,29.7864076 29.7842933,28 31.990053,28 L48.009947,28 C50.2135924,28 52,29.7842933 52,31.990053 L52,48.009947 C52,50.2135924 50.2157067,52 48.009947,52 L31.990053,52 C29.7864076,52 28,50.2157067 28,48.009947 L28,31.990053 Z"></path>
+        <rect x="96" y="16" width="16" height="16" rx="6"></rect>
+        <rect x="96" y="48" width="16" height="16" rx="6"></rect>
+        <rect x="16" y="112" width="16" height="16" rx="6"></rect>
+        <rect x="96" y="64" width="16" height="16" rx="6"></rect>
+        <rect x="96" y="96" width="16" height="16" rx="6"></rect>
+        <rect x="48" y="96" width="16" height="16" rx="6"></rect>
+        <rect x="112" y="0" width="16" height="16" rx="6"></rect>
+        <rect x="32" y="96" width="16" height="16" rx="6"></rect>
+        <rect x="112" y="16" width="16" height="16" rx="6"></rect>
+        <rect x="112" y="80" width="16" height="16" rx="6"></rect>
+        <rect x="112" y="48" width="16" height="16" rx="6"></rect>
+        <rect x="112" y="112" width="16" height="16" rx="6"></rect>
+        <rect x="32" y="112" width="16" height="16" rx="6"></rect>
+        <rect x="80" y="112" width="16" height="16" rx="6"></rect>
+        <rect x="0" y="112" width="16" height="16" rx="6"></rect>
+        <rect x="0" y="96" width="16" height="16" rx="6"></rect>
+    </g>
+</svg>

plugins/tiddlywiki/qrcode/makeqr.js

@@ -0,0 +1,74 @@
+/*\
+title: $:/plugins/tiddlywiki/qrcode/makeqr.js
+type: application/javascript
+module-type: macro
+
+Macro to convert a string into a QR Code
+
+\*/
+(function(){
+
+/*jslint node: true, browser: true */
+/*global $tw: false */
+"use strict";
+
+/*
+Information about this macro
+*/
+
+var qrcode = require("$:/plugins/tiddlywiki/qrcode/qrcode.js");
+
+var QRCODE_GENERATION_ERROR_PREFIX = '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 300 300"><text x="0" y="30" fill="red" font-family="Helvetica, sans-serif" font-size="18">',
+	QRCODE_GENERATION_ERROR_SUFFIX = '</text></svg>';
+
+exports.name = "makeqr";
+
+exports.params = [
+	{name: "text"},
+	{name: "size"},
+	{name: "errorCorrectLevel"},
+	{name: "fallback"}
+];
+
+/*
+Run the macro
+*/
+exports.run = function(text,size,errorCorrectLevel,fallback) {
+	var result;
+	try {
+		result = generateQrCode(text,{size: size, errorCorrectLevel: errorCorrectLevel});
+	} catch (ex) {
+		console.log("makeqr error: " + ex);
+		result = fallback || ("data:image/svg+xml," + encodeURI(QRCODE_GENERATION_ERROR_PREFIX + ex + QRCODE_GENERATION_ERROR_SUFFIX));
+	}
+	return result || "";
+};
+
+function generateQrCode(text,options) {
+	options = options || {};
+	var typeNumber = options.typeNumber || 4,
+		errorCorrectLevel = options.errorCorrectLevel || "M",
+		size = options.size || 500,
+		qr;
+	try {
+		qr = qrcode(typeNumber,errorCorrectLevel);
+		qr.addData(text);
+		qr.make();
+	} catch (e) {
+		if(typeNumber >= 40) {
+			throw new Error("Text too long to encode");
+		} else {
+			return generateQrCode(text, {
+				size: size,
+				errorCorrectLevel: errorCorrectLevel,
+				typeNumber: typeNumber + 1
+			});
+		}
+	}
+	var cellsize = parseInt(size / qr.getModuleCount()),
+		margin = parseInt((size - qr.getModuleCount() * cellsize) / 2);
+	return qr.createImgTag(cellsize, margin, size);
+}
+
+
+})();

plugins/tiddlywiki/qrcode/plugin.info

@@ -0,0 +1,7 @@
+{
+	"title": "$:/plugins/tiddlywiki/qrcode",
+	"description": "QR Code generator",
+	"author": "Zeno Zeng, adapted by Jeremy Ruston",
+	"plugin-type": "plugin",
+	"list": "readme usage examples license"
+}