here's a canvas app!

pull/1/head
ansuz 9 years ago
parent 41276fffb5
commit 7c4b334ad3

@ -0,0 +1,73 @@
<!DOCTYPE html>
<html>
<head>
<meta content="text/html; charset=utf-8" http-equiv="content-type"/>
<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
<script data-main="main" src="/bower_components/requirejs/require.js"></script>
<style>
html, body{
padding: 0px;
margin: 0px;
overflow: hidden;
box-sizing: border-box;
}
textarea{
width: 100%;
height: 100vh;
max-width: 100%;
max-height: 100vh;
font-size: 18px;
background-color: #073642;
color: #839496;
overflow-x: hidden;
/* disallow textarea resizes */
resize: none;
}
canvas {
border: 5px solid black;
}
#clear {
display: inline;
}
#colors {
z-index: 100;
border: 3px solid black;
padding: 5px;
}
span.palette {
height: 50px;
width: 50px;
display: inline-block;
margin: 5px;
border: 2px solid black;
}
#controls {
display: block;
position: relative;
border: 3px solid black;
}
#width, #colors {
position: relative;
}
</style>
</head>
<body>
<canvas id="canvas" width="600" height="600" ></canvas>
<h2>Welcome to CryptCanvas!</h2>
<h3>Zero Knowledge Realtime Collaborative Canvas Editing</h3>
<div id="controls">
<button id="clear">Clear</button>
<input id="width" type="number" value="5"></input>
<div id="colors">&nbsp;</div>
</div>
</body>
</html>

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require.config({ paths: {
'json.sortify': '/bower_components/json.sortify/dist/JSON.sortify'
}});
define([
'/api/config?cb=' + Math.random().toString(16).substring(2),
'/common/RealtimeTextarea.js',
'/common/messages.js',
'/common/crypto.js',
'/common/TextPatcher.js',
'/bower_components/fabric.js/dist/fabric.min.js',
'json.sortify',
'/bower_components/jquery/dist/jquery.min.js',
'/customize/pad.js'
], function (Config, Realtime, Messages, Crypto, TextPatcher, Fabric, JSONSortify) {
var module = window.APP = { };
var $ = module.$ = window.jQuery;
var Fabric = module.Fabric = window.fabric;
$(window).on('hashchange', function() {
window.location.reload();
});
if (window.location.href.indexOf('#') === -1) {
window.location.href = window.location.href + '#' + Crypto.genKey();
return;
}
/* Initialize Fabric */
var canvas = module.canvas = new Fabric.Canvas('canvas');
var $canvas = $('canvas');
var $width = $('#width');
var updateBrushWidth = function () {
canvas.freeDrawingBrush.width = Number($width.val());
};
updateBrushWidth();
$width.on('change', updateBrushWidth);
var palette = ['red', 'blue', 'green', 'white', 'black', 'purple', 'gray'];
var $colors = $('#colors');
$colors.html(function (i, val) {
return palette.map(function (c) {
return "<span class='palette' style='background-color:"+c+"'></span>";
}).join("");
});
$('.palette').on('click', function () {
var color = $(this).css('background-color');
canvas.freeDrawingBrush.color = color;
});
var setEditable = function (bool) {
canvas.isDrawingMode = bool;
$canvas.css('border-color', bool? 'black': 'red');
};
var key = Crypto.parseKey(window.location.hash.substring(1));
var initializing = true;
var config = module.config = {
websocketURL: Config.websocketURL + '_old',
userName: Crypto.rand64(8),
channel: key.channel,
cryptKey: key.cryptKey
};
var onInit = config.onInit = function (info) { };
var onRemote = config.onRemote = function () {
if (initializing) { return; }
var userDoc = module.realtime.getUserDoc();
canvas.loadFromJSON(userDoc);
canvas.renderAll();
};
var onLocal = config.onLocal = function () {
if (initializing) { return; }
var content = JSONSortify(canvas.toDatalessJSON());
module.patchText(content);
};
var onReady = config.onReady = function (info) {
var realtime = module.realtime = info.realtime;
module.patchText = TextPatcher.create({
realtime: realtime
});
setEditable(true);
initializing = false;
onRemote();
};
var onAbort = config.onAbort = function (info) {
setEditable(false);
window.alert("Server Connection Lost");
};
var rt = Realtime.start(config);
canvas.on('mouse:up', onLocal);
$('#clear').on('click', function () {
canvas.clear();
});
});
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