mirror of https://github.com/xwiki-labs/cryptpad
here's a canvas app!
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ansuz
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<!DOCTYPE html>
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<html>
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<head>
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<meta content="text/html; charset=utf-8" http-equiv="content-type"/>
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<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
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<script data-main="main" src="/bower_components/requirejs/require.js"></script>
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<style>
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html, body{
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padding: 0px;
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margin: 0px;
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overflow: hidden;
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box-sizing: border-box;
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}
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textarea{
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width: 100%;
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height: 100vh;
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max-width: 100%;
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max-height: 100vh;
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font-size: 18px;
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background-color: #073642;
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color: #839496;
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overflow-x: hidden;
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/* disallow textarea resizes */
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resize: none;
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}
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canvas {
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border: 5px solid black;
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}
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#clear {
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display: inline;
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}
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#colors {
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z-index: 100;
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border: 3px solid black;
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padding: 5px;
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}
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span.palette {
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height: 50px;
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width: 50px;
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display: inline-block;
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margin: 5px;
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border: 2px solid black;
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}
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#controls {
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display: block;
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position: relative;
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border: 3px solid black;
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}
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#width, #colors {
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position: relative;
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}
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</style>
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</head>
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<body>
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<canvas id="canvas" width="600" height="600" ></canvas>
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<h2>Welcome to CryptCanvas!</h2>
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<h3>Zero Knowledge Realtime Collaborative Canvas Editing</h3>
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<div id="controls">
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<button id="clear">Clear</button>
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<input id="width" type="number" value="5"></input>
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<div id="colors"> </div>
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</div>
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</body>
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</html>
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require.config({ paths: {
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'json.sortify': '/bower_components/json.sortify/dist/JSON.sortify'
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}});
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define([
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'/api/config?cb=' + Math.random().toString(16).substring(2),
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'/common/RealtimeTextarea.js',
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'/common/messages.js',
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'/common/crypto.js',
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'/common/TextPatcher.js',
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'/bower_components/fabric.js/dist/fabric.min.js',
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'json.sortify',
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'/bower_components/jquery/dist/jquery.min.js',
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'/customize/pad.js'
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], function (Config, Realtime, Messages, Crypto, TextPatcher, Fabric, JSONSortify) {
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var module = window.APP = { };
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var $ = module.$ = window.jQuery;
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var Fabric = module.Fabric = window.fabric;
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$(window).on('hashchange', function() {
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window.location.reload();
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});
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if (window.location.href.indexOf('#') === -1) {
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window.location.href = window.location.href + '#' + Crypto.genKey();
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return;
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}
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/* Initialize Fabric */
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var canvas = module.canvas = new Fabric.Canvas('canvas');
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var $canvas = $('canvas');
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var $width = $('#width');
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var updateBrushWidth = function () {
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canvas.freeDrawingBrush.width = Number($width.val());
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};
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updateBrushWidth();
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$width.on('change', updateBrushWidth);
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var palette = ['red', 'blue', 'green', 'white', 'black', 'purple', 'gray'];
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var $colors = $('#colors');
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$colors.html(function (i, val) {
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return palette.map(function (c) {
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return "<span class='palette' style='background-color:"+c+"'></span>";
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}).join("");
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});
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$('.palette').on('click', function () {
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var color = $(this).css('background-color');
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canvas.freeDrawingBrush.color = color;
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});
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var setEditable = function (bool) {
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canvas.isDrawingMode = bool;
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$canvas.css('border-color', bool? 'black': 'red');
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};
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var key = Crypto.parseKey(window.location.hash.substring(1));
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var initializing = true;
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var config = module.config = {
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websocketURL: Config.websocketURL + '_old',
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userName: Crypto.rand64(8),
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channel: key.channel,
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cryptKey: key.cryptKey
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};
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var onInit = config.onInit = function (info) { };
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var onRemote = config.onRemote = function () {
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if (initializing) { return; }
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var userDoc = module.realtime.getUserDoc();
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canvas.loadFromJSON(userDoc);
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canvas.renderAll();
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};
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var onLocal = config.onLocal = function () {
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if (initializing) { return; }
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var content = JSONSortify(canvas.toDatalessJSON());
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module.patchText(content);
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};
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var onReady = config.onReady = function (info) {
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var realtime = module.realtime = info.realtime;
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module.patchText = TextPatcher.create({
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realtime: realtime
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});
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setEditable(true);
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initializing = false;
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onRemote();
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};
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var onAbort = config.onAbort = function (info) {
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setEditable(false);
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window.alert("Server Connection Lost");
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};
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var rt = Realtime.start(config);
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canvas.on('mouse:up', onLocal);
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$('#clear').on('click', function () {
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canvas.clear();
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});
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});
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