/**
* Canteen v1.0.4
* August 19th, 2015
*
* Copyright 2015 Platfora, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
;(function() {
// ================================ Constants ================================
var CONTEXT_2D_ATTRIBUTES = [
'fillStyle',
'font',
'globalAlpha',
'globalCompositeOperation',
'lineCap',
'lineDashOffset',
'lineJoin',
'lineWidth',
'miterLimit',
'shadowBlur',
'shadowColor',
'shadowOffsetX',
'shadowOffsetY',
'strokeStyle',
'textAlign',
'textBaseline'
];
// ================================ Utils ================================
function each(arr, func) {
var len = arr.length,
n;
for (n=0; n<len; n++) {
func(arr[n], n);
}
}
function round(val, decimalPoints) {
var power = Math.pow(10, decimalPoints);
return Math.round(val * power) / power;
}
function roundArr(arr, decimalPoints) {
var len = arr.length,
ret = [],
n;
for (n=0; n<len; n++) {
if (isNumber(arr[n])) {
ret.push(round(arr[n], decimalPoints));
}
else {
ret.push(arr[n]);
}
}
return ret;
}
function isFunction(func) {
return func && {}.toString.call(func) === '[object Function]';
}
function isNumber(val) {
return typeof val === 'number';
}
// ================================ Canteen Class ================================
/**
* Canteen Constructor
* @constructor
*/
var Canteen = function(context) {
var that = this;
this._stack = [];
this.context = context;
// add observable attributes
each(CONTEXT_2D_ATTRIBUTES, function(key, n) {
Object.defineProperty(that, key, {
get: function() {
return that.context[key];
},
set: function(val) {
that._pushAttr(key, val);
that.context[key] = val;
}
});
});
};
// Canteen methods
Canteen.prototype = {
/**
* get a stack of operations
* @method stack
* @param {Object} config
* @param {String} [config.loose=false] - strict mode returns method calls with arguments and property names
* with values. loose mode only returns method calls and property names
* @param {Number} [config.decimalPoints=3] - number of decimal points to round numeric values to. The default is
* 3, i.e. 1.23456 will round to 1.234
* @returns {Array}
* @public
*/
stack: function(config) {
var config = config || {},
loose = config.loose,
decimalPoints = config.decimalPoints === undefined ? 3 : config.decimalPoints,
ret = [];
if (loose) {
each(this._stack, function(el, n) {
ret.push(el.method || el.attr);
});
}
else {
each(this._stack, function(el, n) {
// if method instruction
if (el.method) {
ret.push({
method: el.method,
arguments: roundArr(el.arguments, decimalPoints)
});
}
// if attr
else if (el.attr) {
ret.push({
attr: el.attr,
val: isNumber(el.val) ? round(el.val, decimalPoints) : el.val
});
}
});
}
return ret;
},
/**
* serialize a stack into a string
* @method json
* @param {Object} config
* @param {String} [config.loose=false] - strict mode returns method calls with arguments and property names
* with values. loose mode only returns method calls and property names
* @param {Number} [config.decimalPoints=3] - number of decimal points to round numeric values to. The default is
* 3, i.e. 1.23456 will round to 1.234
* @returns {String}
* @public
*/
json: function(config) {
return JSON.stringify(this.stack(config));
},
/**
* convert a stack into a small hash string for easy comparisons
* @method hash
* @param {Object} config
* @param {String} [config.loose=false] - strict mode returns method calls with arguments and property names
* with values. loose mode only returns method calls and property names
* @param {Number} [config.decimalPoints=3] - number of decimal points to round numeric values to. The default is
* 3, i.e. 1.23456 will round to 1.234
* @public
* @returns {String}
*/
hash: function(config) {
return Canteen.md5(this.json(config));
},
/**
* clear the stack
* @method clear
* @public
*/
clear: function() {
this._stack = [];
},
/**
* push instruction method onto the stack
* @method _pushMethod
* @param {String} method
* @param {arguments} args
* @private
*/
_pushMethod: function(method, args) {
this._stack.push({
method: method,
arguments: Array.prototype.slice.call(args, 0)
});
this._slice();
},
/**
* push instruction attribute onto the stack
* @method _pushAttr
* @param {String} attr
* @param {*} val
* @private
*/
_pushAttr: function(attr, val) {
this._stack.push({
attr: attr,
val: val
});
this._slice();
},
/**
* slice the stack if needed. This means making sure that it doesn't exceed
* the STACK_SIZE. if it does, then shorten the stack starting from the beginning
* @method _slice
* @private
*/
_slice: function() {
var stack = this._stack,
len = stack.length,
exceded = len - Canteen.globals.STACK_SIZE;
if (exceded > 0) {
this._stack = stack.slice(exceded);
}
}
};
// generate observable methods and add them to the Canteen prototype
(function(){
var proto = CanvasRenderingContext2D.prototype,
key, val, desc;
function addMethod(key, val) {
Canteen.prototype[key] = function() {
this._pushMethod(key, arguments);
return this.context[key].apply(this.context, arguments);
};
}
for (key in proto) {
desc = Object.getOwnPropertyDescriptor(CanvasRenderingContext2D.prototype, key);
val = (desc && desc.value ? proto[key] : null);
if (isFunction(val)) {
addMethod(key, val);
}
}
})();
// ================================ Global Config ================================
/**
* global config. You can directly change these values in order to configure Canteen
* @static
* @example
* // change stack size to 3000
* Canteen.globals.STACK_SIZE = 3000;
*/
Canteen.globals = {
STACK_SIZE: 10000
};
// ================================ Initialization ================================
// override the canvas context getContext method in order to automatically instantiate
// a Canteen instance and wrap the native context object
(function(){
var origGetContext = HTMLCanvasElement.prototype.getContext;
HTMLCanvasElement.prototype.getContext = function() {
var context = origGetContext.apply(this, arguments);
// if the context already has a canteen instance, then return it
if (context.canteen) {
return context.canteen
}
// if the context does not have a canteen instance, then instantiate one
// and return it
else {
context.canteen = new Canteen(context);
return context.canteen;
}
}
})();
// make the Canteen namespace global so that developers can configure
// it via Canteen.globals, or override methods if desired
window.Canteen = Canteen;
})();
;/*
* JavaScript MD5 1.0.1
* https://github.com/blueimp/JavaScript-MD5
*
* Copyright 2011, Sebastian Tschan
* https://blueimp.net
*
* Licensed under the MIT license:
* http://www.opensource.org/licenses/MIT
*
* Based on
* A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
* Digest Algorithm, as defined in RFC 1321.
* Version 2.2 Copyright (C) Paul Johnston 1999 - 2009
* Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
* Distributed under the BSD License
* See http://pajhome.org.uk/crypt/md5 for more info.
*/
/*jslint bitwise: true */
/*global unescape, define */
(function ($) {
'use strict';
/*
* Add integers, wrapping at 2^32. This uses 16-bit operations internally
* to work around bugs in some JS interpreters.
*/
function safe_add(x, y) {
var lsw = (x & 0xFFFF) + (y & 0xFFFF),
msw = (x >> 16) + (y >> 16) + (lsw >> 16);
return (msw << 16) | (lsw & 0xFFFF);
}
/*
* Bitwise rotate a 32-bit number to the left.
*/
function bit_rol(num, cnt) {
return (num << cnt) | (num >>> (32 - cnt));
}
/*
* These functions implement the four basic operations the algorithm uses.
*/
function md5_cmn(q, a, b, x, s, t) {
return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b);
}
function md5_ff(a, b, c, d, x, s, t) {
return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
}
function md5_gg(a, b, c, d, x, s, t) {
return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
}
function md5_hh(a, b, c, d, x, s, t) {
return md5_cmn(b ^ c ^ d, a, b, x, s, t);
}
function md5_ii(a, b, c, d, x, s, t) {
return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
}
/*
* Calculate the MD5 of an array of little-endian words, and a bit length.
*/
function binl_md5(x, len) {
/* append padding */
x[len >> 5] |= 0x80 << (len % 32);
x[(((len + 64) >>> 9) << 4) + 14] = len;
var i, olda, oldb, oldc, oldd,
a = 1732584193,
b = -271733879,
c = -1732584194,
d = 271733878;
for (i = 0; i < x.length; i += 16) {
olda = a;
oldb = b;
oldc = c;
oldd = d;
a = md5_ff(a, b, c, d, x[i], 7, -680876936);
d = md5_ff(d, a, b, c, x[i + 1], 12, -389564586);
c = md5_ff(c, d, a, b, x[i + 2], 17, 606105819);
b = md5_ff(b, c, d, a, x[i + 3], 22, -1044525330);
a = md5_ff(a, b, c, d, x[i + 4], 7, -176418897);
d = md5_ff(d, a, b, c, x[i + 5], 12, 1200080426);
c = md5_ff(c, d, a, b, x[i + 6], 17, -1473231341);
b = md5_ff(b, c, d, a, x[i + 7], 22, -45705983);
a = md5_ff(a, b, c, d, x[i + 8], 7, 1770035416);
d = md5_ff(d, a, b, c, x[i + 9], 12, -1958414417);
c = md5_ff(c, d, a, b, x[i + 10], 17, -42063);
b = md5_ff(b, c, d, a, x[i + 11], 22, -1990404162);
a = md5_ff(a, b, c, d, x[i + 12], 7, 1804603682);
d = md5_ff(d, a, b, c, x[i + 13], 12, -40341101);
c = md5_ff(c, d, a, b, x[i + 14], 17, -1502002290);
b = md5_ff(b, c, d, a, x[i + 15], 22, 1236535329);
a = md5_gg(a, b, c, d, x[i + 1], 5, -165796510);
d = md5_gg(d, a, b, c, x[i + 6], 9, -1069501632);
c = md5_gg(c, d, a, b, x[i + 11], 14, 643717713);
b = md5_gg(b, c, d, a, x[i], 20, -373897302);
a = md5_gg(a, b, c, d, x[i + 5], 5, -701558691);
d = md5_gg(d, a, b, c, x[i + 10], 9, 38016083);
c = md5_gg(c, d, a, b, x[i + 15], 14, -660478335);
b = md5_gg(b, c, d, a, x[i + 4], 20, -405537848);
a = md5_gg(a, b, c, d, x[i + 9], 5, 568446438);
d = md5_gg(d, a, b, c, x[i + 14], 9, -1019803690);
c = md5_gg(c, d, a, b, x[i + 3], 14, -187363961);
b = md5_gg(b, c, d, a, x[i + 8], 20, 1163531501);
a = md5_gg(a, b, c, d, x[i + 13], 5, -1444681467);
d = md5_gg(d, a, b, c, x[i + 2], 9, -51403784);
c = md5_gg(c, d, a, b, x[i + 7], 14, 1735328473);
b = md5_gg(b, c, d, a, x[i + 12], 20, -1926607734);
a = md5_hh(a, b, c, d, x[i + 5], 4, -378558);
d = md5_hh(d, a, b, c, x[i + 8], 11, -2022574463);
c = md5_hh(c, d, a, b, x[i + 11], 16, 1839030562);
b = md5_hh(b, c, d, a, x[i + 14], 23, -35309556);
a = md5_hh(a, b, c, d, x[i + 1], 4, -1530992060);
d = md5_hh(d, a, b, c, x[i + 4], 11, 1272893353);
c = md5_hh(c, d, a, b, x[i + 7], 16, -155497632);
b = md5_hh(b, c, d, a, x[i + 10], 23, -1094730640);
a = md5_hh(a, b, c, d, x[i + 13], 4, 681279174);
d = md5_hh(d, a, b, c, x[i], 11, -358537222);
c = md5_hh(c, d, a, b, x[i + 3], 16, -722521979);
b = md5_hh(b, c, d, a, x[i + 6], 23, 76029189);
a = md5_hh(a, b, c, d, x[i + 9], 4, -640364487);
d = md5_hh(d, a, b, c, x[i + 12], 11, -421815835);
c = md5_hh(c, d, a, b, x[i + 15], 16, 530742520);
b = md5_hh(b, c, d, a, x[i + 2], 23, -995338651);
a = md5_ii(a, b, c, d, x[i], 6, -198630844);
d = md5_ii(d, a, b, c, x[i + 7], 10, 1126891415);
c = md5_ii(c, d, a, b, x[i + 14], 15, -1416354905);
b = md5_ii(b, c, d, a, x[i + 5], 21, -57434055);
a = md5_ii(a, b, c, d, x[i + 12], 6, 1700485571);
d = md5_ii(d, a, b, c, x[i + 3], 10, -1894986606);
c = md5_ii(c, d, a, b, x[i + 10], 15, -1051523);
b = md5_ii(b, c, d, a, x[i + 1], 21, -2054922799);
a = md5_ii(a, b, c, d, x[i + 8], 6, 1873313359);
d = md5_ii(d, a, b, c, x[i + 15], 10, -30611744);
c = md5_ii(c, d, a, b, x[i + 6], 15, -1560198380);
b = md5_ii(b, c, d, a, x[i + 13], 21, 1309151649);
a = md5_ii(a, b, c, d, x[i + 4], 6, -145523070);
d = md5_ii(d, a, b, c, x[i + 11], 10, -1120210379);
c = md5_ii(c, d, a, b, x[i + 2], 15, 718787259);
b = md5_ii(b, c, d, a, x[i + 9], 21, -343485551);
a = safe_add(a, olda);
b = safe_add(b, oldb);
c = safe_add(c, oldc);
d = safe_add(d, oldd);
}
return [a, b, c, d];
}
/*
* Convert an array of little-endian words to a string
*/
function binl2rstr(input) {
var i,
output = '';
for (i = 0; i < input.length * 32; i += 8) {
output += String.fromCharCode((input[i >> 5] >>> (i % 32)) & 0xFF);
}
return output;
}
/*
* Convert a raw string to an array of little-endian words
* Characters >255 have their high-byte silently ignored.
*/
function rstr2binl(input) {
var i,
output = [];
output[(input.length >> 2) - 1] = undefined;
for (i = 0; i < output.length; i += 1) {
output[i] = 0;
}
for (i = 0; i < input.length * 8; i += 8) {
output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << (i % 32);
}
return output;
}
/*
* Calculate the MD5 of a raw string
*/
function rstr_md5(s) {
return binl2rstr(binl_md5(rstr2binl(s), s.length * 8));
}
/*
* Calculate the HMAC-MD5, of a key and some data (raw strings)
*/
function rstr_hmac_md5(key, data) {
var i,
bkey = rstr2binl(key),
ipad = [],
opad = [],
hash;
ipad[15] = opad[15] = undefined;
if (bkey.length > 16) {
bkey = binl_md5(bkey, key.length * 8);
}
for (i = 0; i < 16; i += 1) {
ipad[i] = bkey[i] ^ 0x36363636;
opad[i] = bkey[i] ^ 0x5C5C5C5C;
}
hash = binl_md5(ipad.concat(rstr2binl(data)), 512 + data.length * 8);
return binl2rstr(binl_md5(opad.concat(hash), 512 + 128));
}
/*
* Convert a raw string to a hex string
*/
function rstr2hex(input) {
var hex_tab = '0123456789abcdef',
output = '',
x,
i;
for (i = 0; i < input.length; i += 1) {
x = input.charCodeAt(i);
output += hex_tab.charAt((x >>> 4) & 0x0F) +
hex_tab.charAt(x & 0x0F);
}
return output;
}
/*
* Encode a string as utf-8
*/
function str2rstr_utf8(input) {
return unescape(encodeURIComponent(input));
}
/*
* Take string arguments and return either raw or hex encoded strings
*/
function raw_md5(s) {
return rstr_md5(str2rstr_utf8(s));
}
function hex_md5(s) {
return rstr2hex(raw_md5(s));
}
function raw_hmac_md5(k, d) {
return rstr_hmac_md5(str2rstr_utf8(k), str2rstr_utf8(d));
}
function hex_hmac_md5(k, d) {
return rstr2hex(raw_hmac_md5(k, d));
}
function md5(string, key, raw) {
if (!key) {
if (!raw) {
return hex_md5(string);
}
return raw_md5(string);
}
if (!raw) {
return hex_hmac_md5(key, string);
}
return raw_hmac_md5(key, string);
}
if (typeof define === 'function' && define.amd) {
define(function () {
return md5;
});
} else {
$.md5 = md5;
}
}(Canteen)); |