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