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|
/* Documentation Note:
* Public methods and properties are commented with /** some text *\/
* and private methods and properties are commented with //
*
* Please leave it that way to keep this documentation sane
*/
/*
* Karma Framework
* http://karmaeducation.org
*
* Copyright (c) 2009
* Bryan W Berry bryan@olenepal.org
* Felipe López Toledo zer.subzero@gmail.com
*
* Under MIT License:
* 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.
*/
/**
* @fileOverview Contains karma library
* @author Bryan Berry <bryan@olenepal.org>
* @author Felipe Lopez Toledo <zer.subzero@gmail.com>
*/
//common.js modules use exports object
if(!this.exports) {
exports = {};
}
/** Karma is the namespace for the Karma library and Karma() is the constructor
* function for the Karma library object Karma.
* Karma() checks if the current document type is set to HTML 5, throws
* an error if not. Otherwise, initializes the karma object and returns
* a reference to that object.
* @namespace Global namespace for Karma library
* @constructor
* @param {Object} [options={}] options for intializing Karma library
* @param {String} [options.locale=''] sets current locale Not Yet Implemented
* @param {Array} [options.image=[]] array of images to be converted into a collection
* @param {Array} [options.audio=[]] array of audio to be converted into a collection
* @param {Array} [options.video=[]] NYI array of videos to be converted into a collection
* @param {Array} [options.svg=[]] array of SVG elements to be
* converted into a collection. Each SVG element must already exist in the html document
* @param {Array} [options.canvas=[]] array of canvas elements
* to be converted into a collection. Each canvas element must already exist in the
* html document and width and height of each element must be set as attributes
* @throws {Error} if the document type declaration is not set to HTML 5, e.g.
* <!DOCTYPE html>
* @throws {Error} If any of the initialization parameters are invalid values
* @returns {Object} Karma -- reference to the initialized Karma library
* @example
*
* var k = Karma({
* image: [
* {name: "ninja", file: "ninja.png"},
* {name: "cowboy", file: "cowboy.png"}
* ],
* audio: [
* {name: "woosh", file: "woosh.ogg"},
* {name: "yeehaw", file: "yeehaw.ogg"}
* ],
* video: [ //Not Yet Implemented
* {name: "attack", file: "attack.ogv"},
* {name: "ride", file: "ride.ogv"}
* ]
* canvas: [
* {name: "ninja", domId: "ninjaCanvas"},
* {name: "cowboy", domId: "cowboyCanvas"}
* ],
* svg: [
* {name: "ninja", domId: "ninjaSvg"},
* {name: "cowboy", domId: "cowboySvg"}
* ],
* });
* Next, call the ready function with a callback to your program code
*
* k.ready(function () { ... your application code . . . }
*
* after that you can access each asset like so
* k.image.ninja;
* k.svg.cowboy;
* k.audio.yeehaw.play();
* k.canvas.ninja.drawImage(k.image.ninja, 0, 0);
*
*/
var Karma = exports.Karma = function (options) {
Karma._isHtml5(document.doctype.nodeName);
if ( Karma._initialized === true ) {
return Karma;
} else {
return Karma._init(options);
}
};
//helper functions
/**This emulates the Object.create method in ecmascript 5 spec
* This isn't a full implementation as it doesn't support an all of Object.create's features
* This has the same functionality as Crockford's beget method
* and this primary building block for prototypal inheritance in
* this library
* @param {Object} parent that the new object's prototype should point to
* @returns {Object} a new object whose prototype is parent
* @example
*
* var ninja = { weapon : "sword" };
* var ninja1 = Karma.create(ninja);
* ninja1.weapon === "sword"
*/
Karma.create = function (parent){
function F () {};
F.prototype = parent;
return new F();
};
/** Returns a shallow copy of the passed in object
* @param {Object} target to be copied
* @returns {Object} a shallow copy of target
*/
Karma.clone = function (target){
var copy = {};
for ( var i in target ) {
if(target.hasOwnProperty(i)){
copy[i] = target[i];
}
}
return copy;
};
/** Extends properties of the target object with those of
* the source object
* @param {Object} target object to be extended
* @param {Object} source whose properties will extend target
* @returns {Object} target extended by source
*/
Karma.objectPlus = function (target, source){
for ( var i in source){
if (source.hasOwnProperty(i)){
target[i] = source[i];
}
}
return target;
};
Karma.extend = Karma.objectPlus;
/** Creates a new object that is a prototype of the first argument
* then extends it with the properties of the second argument
* @param {Object} parent1 will be prototype of returned object
* @param {Object} parent2 will extend properties of returned object
* @returns {Object} object that whose prototype is parent1 and has
* been extended with properties of parent2
*/
Karma.copyObjectPlus = function (parent1, parent2){
function F () {};
F.prototype = parent1;
var G = new F();
return Karma.objectPlus(G, parent2);
};
//Throws big ugly error if doctype isn't html5
Karma._isHtml5 = function (doctype){
var regex = new RegExp('^html$', 'i');
if(!regex.test(doctype)){
var errorMsg = "ERROR: The doctype must be set to <!DOCTYPE html> " +
"in order to use Karma. Karma require you use html5";
var errorElem = document.createElement('div');
errorElem.setAttribute('id', 'errorDoctype');
errorElem.innerText = errorMsg;
document.body.appendChild(errorElem);
throw new Error(errorMsg);
}
};
/**
* Shuffles an array of items randomly
* @param {Array} oldList of choices to be shuffled
* @returns {Array} newlist of choices randomly reordered
*/
Karma.shuffle = function (oldList) {
var newList = oldList.slice(0);
for (var i = newList.length - 1; i > 0; i -= 1) {
var j = Karma.rand(0, i);
var t = newList[i];
newList[i] = newList[j];
newList[j] = t;
}
return newList;
};
/**
* Converts a number to numerals in the specified locale. Currently only
* supports Nepali
* @param {Number} Number to be converted
* @param {locale} locale that number should be converted to
* @returns {String} Unicode string for localized numeral
*/
Karma.convertNumToLocale = function(num, locale){
locale = locale || Karma.locale;
//48 is the base for western numerals
var convertDigit = function(digit){
var numBase = 48;
var prefix = "u00";
if (locale === "ne"){
prefix = "u0";
numBase = 2406;
}
return '\\' + prefix +
(numBase + parseInt(digit)).toString(16);
};
var charArray = num.toString().split("").map(convertDigit);
return eval('"' + charArray.join('') + '"');
};
/**
* @name Karma._n
* @function
* @public
* Alias for Karma.convertNumToLocale. Converts a number to numerals to
* Karma.locale or to specified locale. Currently only supports Nepali
* @param {Number} Number to be converted
* @param {locale} locale that number should be converted to
* @returns {String} Unicode string for localized numeral
*/
Karma._n = Karma.convertNumToLocale;
/* Scales the dimensions of document.body to the innerHeight and innerWidth
* of the viewport, i.e. browser window, with a minor offset to the height to
* make sure the scrollbars do not appear
*/
Karma.scaleToViewport = function(){
var width = window.innerWidth;
var height = window.innerHeight;
//hack to ensure scrollbars don't appear
if (height === 900){
height = "" + 900 + "px";
} else {
height = "" + (height - 13) + "px";
}
document.body.style.width = "" + width + "px";
document.body.style.height = height;
};
Karma.scaleWindow = function(){
var width = "1200px";
var height = "900px";
var viewportHeight = "760px";
var $body = $('body');
var $kMain = $('#kMain');
if (window.innerWidth < 1150){
width = "950px";
height = "600px";
viewportHeight = "460px";
$body.css('border', '2px solid black');
// 460/760 * 16 = 9.6
$kMain.css('font-size', '9.6px');
}
$body.css({border: '2px solid black', width: width, height: height});
$kMain.css({width: width, height: viewportHeight});
};
// Below are geometry and math helper methods
/**
* Converts a value from degrees to radians.
* @param {Number} angle The angle in degrees
* @returns {Number} The angle in radians
*/
Karma.radians = function( angle ){
return ( angle / 180 ) * Math.PI;
};
/**
* Gets the square of the Euclidian (ordinary) distance between 2 points.
* @param {Object} Point No. 0
* @param {Number} Point0.x
* @param {Number} Point0.y
* @param {Object} Point No. 1
* @param {Number} Point1.x
* @param {Number} Point1.y
* @returns {Number} The square of the Euclidian distance
* @example
*
* p0 = {x:0, y:1};
* p1 = {x:50, y:70};
* var d = distance2(p0, p1);
*
*/
Karma.distance2 = function ( p0, p1 ) {
return (p1.x - p0.x) * (p1.x - p0.x) + (p1.y - p1.y) * (p1.y - p1.y);
};
/**
* Gets the Euclidian (ordinary) distance between 2 points.<br>
* <b>Warning:</b> It's slower than distance2 function
* @param {Object} Point No. 0
* @param {Number} Point0.x
* @param {Number} Point0.y
* @param {Object} Point No. 1
* @param {Number} Point1.x
* @param {Number} Point1.y
* @returns {Number} The Euclidian distance
* @example
*
* p0 = {x:0, y:1};
* p1 = {x:50, y:70};
* var d = distance2(p0, p1);
*
*/
Karma.distance = function ( p0, p1 ) {
return Math.sqrt( this.distance2( p0, p1 ) );
};
/** Returns a random number within the range provided
* @param {Number} lower limit of the range, lowest number that can be returned
* @param {Number} upper limit of the range, highest number that can be returned
* @returns {Number} number that is >= lower and <= upper
* @example
*
* var num = rand(0, 10);
*
* //num could be 0, 1, 2, 3 ... or 10
*
*/
Karma.rand = function ( lower, upper ){
return Math.floor(Math.random() * (upper - lower + 1) + lower);
};
Karma.extend(Karma, {
/** This is the global locale as passed to Karma(),
* such as "en", "es_SP"
* @fieldOf Karma
* @property {string} locale This is the global locale as passed to Karma()
* @default 'en'
*/
locale : 'en',
/** Collection of images with special helper
* methods added to each reference
* @fieldOf Karma
* @type object
* @default empty object
*/
image : {},
/** Collection of audio files with special helper
* methods added to each reference
* @fieldOf Karma
* @type object
* @default empty object
*/
audio : {},
/** Collection of html 5 canvases with special helper
* methods added to each reference
* @fieldOf Karma
* @type object
* @default empty object
*/
canvas : {},
/** Collection of svgs with special helper
* methods added to each reference
* @fieldOf Karma
* @type object
* @default empty object
*/
svg : {},
/** Collection of videos with special helper
* methods added to each reference
* @fieldOf Karma
* @type object
* @default empty object
*/
video : {},
_localized : false,
_assetPath : "assets/",
_localePath : "",
_initialized : false,
_statusDiv: undefined,
_loaderDiv : undefined,
_counters : { total : 0, errors : 0, loaded : 0},
//This constructs the Karma object per values provided by the user
_init: function(options) {
this._initialized = true;
//set up message that show count of assets loaded
//and has an ordered list to append error messages to
var _statusDiv = this._statusDiv = document.createElement('div');
this._loaderDiv = this._loaderDiv = document.createElement('div');
var errorList = document.createElement('ol');
_statusDiv.setAttribute('id', 'karma-status');
_statusDiv.setAttribute('style', 'position:absolute;');
_statusDiv.innerHTML = 'Karma is loading ...';
this._loaderDiv.setAttribute('id', 'karma-loader');
this._loaderDiv.setAttribute('class', 'status');
errorList.setAttribute('id', 'errorList');
_statusDiv.appendChild(this._loaderDiv);
this._statusDiv.appendChild(errorList);
document.body.appendChild(_statusDiv);
//regular expression that matches the name of aprivate property
// the karma object
var regexPrivate = new RegExp('^_.*');
for ( var option in options ) {
if (options.hasOwnProperty(option)){
if (option === "image" || option === "audio" || option ===
"svg" || option === "video" || option === "canvas"){
if(!(options[option] instanceof Array)){
throw new Error("" + option + " must be an array");
} else if (options[option].length === 0){
continue;
}
} else if (regexPrivate.test(option)){
//don't overwrite a private property of karma object
continue;
}
switch (option){
case "locale":
if (this._isValidLocale(options[option])){
this.locale = this._normalizeLocale(options[option]);
this._localized = true;
this._localePath = Karma._computeLocalePath(this.locale);
} else {
throw new Error("locale provided to karma._init() is invalid");
}
break;
case "image":
options[option]._type = 'image';
Karma._makeCollection(options[option], 'image');
break;
case "audio":
options[option]._type = 'audio';
Karma._makeCollection(options[option], 'audio');
break;
case "video":
options[option]._type = 'video';
Karma._makeCollection(options[option], 'video');
break;
case "svg":
options[option]._type = 'svg';
Karma._makeCollection(options[option], 'svg');
break;
case "canvas":
options[option]._type = 'canvas';
Karma._makeCollection(options[option], 'canvas');
break;
}
}
}
return this;
},
/** Waits until all assets loaded(ready), then calls callback cb
* @memberOf Karma
* @param {Function} [cb] callback function
* @returns this
* @throws {Error} if Karma is not initialized with the
* Karma({ options }) function
* @example
*
* var k = Karma({ . . . your assets here . . . });
* k.ready(function(){ .. your code here . . .});
*
* your code will not be called until all assets have been loaded
* into collections
*
*/
ready : function( cb ) {
var that = this;
if (Karma._initialized !== true){
throw new Error("Karma not initialized");
}
if (this._counters.loaded !== this._counters.total){
setTimeout(function(){ that.ready(cb);}, 5);
} else if (cb) {
//hide the "Karma is loading..." message
this._statusDiv.setAttribute('style', 'display:none;');
cb();
} else if (!cb) {
//hide the "Karma is loading..." message
this._statusDiv.setAttribute('style', 'display:none;');
//if no options passed, show it works message
this._showStarterMessage();
}
return this;
},
//Display Apache-like "It works" message if no options
_showStarterMessage : function (){
var starterMsg = document.createElement('div');
starterMsg.setAttribute('id', 'starterMsg');
starterMsg.innerHTML = "<h1>It Works</h1>";
document.body.appendChild(starterMsg);
},
//Updates visible counter of how many assets are loaded
_updateStatus : function (errorMsg) {
var loaded = this._counters.loaded;
var total = this._counters.total;
var errors = this._counters.errors;
this._loaderDiv.innerHTML = "Loaded " + loaded + " / " + total +
"" + (errors > 0 ? " Errors [ " + errors +" ]" : '');
if (errorMsg) {
var liError = document.createElement('li');
liError.innerHTML = errorMsg;
var errorList = document.getElementById('errorList');
errorList.appendChild(liError);
}
},
//matches 2 letter country code then optionally
//a dash or underscore followed by a country or language identifier
//i currently only allow a language identifier 2-3 chars long
_isValidLocale : function (locale) {
var localeRegex = new RegExp('^[a-zA-Z][a-zA-Z]([-_][a-zA-z]{2,3})?$');
return localeRegex.test(locale);
},
_normalizeLocale : function(locale) {
var lang = "";
var country = "";
var divider = "";
lang = locale.slice(0, 2).toLowerCase();
divider = "_";
country = locale.slice(3, 6).toUpperCase();
return locale.length > 2 ? "" + lang + divider + country : lang;
},
});
//Helper functions for creating assets
Karma._isLocalized = function (boolLocalized) {
if (typeof boolLocalized === "boolean" ) {
if(boolLocalized === true &&
Karma.locale === undefined){
throw new Error("You cannot localize a media asset" +
" if the global locale for Karma isn't set");
} else {
return boolLocalized;
}
} else if (typeof boolLocalized === undefined){
return false;
} else{
throw new Error("This is not a valid value for the localized option");
}
};
Karma._computeLocalePath = function(locale) {
return Karma._assetPath + locale + "/";
};
Karma._makeCollection = function (configs, type){
var makeAsset = function (config){
var asset = undefined;
var target = undefined;
switch(type){
case "image":
target = Karma.kImage;
break;
case "audio":
target = Karma.kAudio;
break;
case "video":
target = Karma.kVideo;
break;
case "svg":
target = Karma.kSvg;
break;
case "canvas":
target = Karma.kCanvas;
break;
}
asset = Karma.create(target)._init(config);
Karma[type][config.name] = asset;
};
configs.forEach(function(config){ makeAsset(config);});
};
//Prototype objects for assets
/** Prototype object for images
* @class This object is the prototype for images submitted to Karma in the
* Karma() method
* @ throws {Error} if the image asset is set to be localized but
* the global locale is not set on the Karma object
* @ throws {Error} if the name and file properties are not supplied
* @example
* kImage is the prototype object for images. This 'media' asset is loaded
* in a distinctly different way from the canvas or svg assets.
*
*/
Karma.kImage =
{
/** file location of image
* @type String
* @default ""
*/
file : "",
/** media object
* @type Image
* @default undefined
*/
media : undefined,
//actual path to the file
_path : "",
//if using localized version of this image
_localized : false,
_type : "image",
//initializes kImage instance with values provided by user
_init : function (image) {
image._localized = image._localized || false;
Karma._counters.total++;
if (image.name === undefined || image.file === undefined){
throw new Error("properties name and file have to be defined");
} else {
this.name = image.name;
this.file = image.file;
}
this.media = new Image();
if(Karma._isLocalized(image._localized)){
this._localized = image._localized;
this._path = Karma._localePath + "image/";
} else {
this._path = Karma._assetPath + "image/";
}
//IMPORTANT: This one magic line loads the file
this.media.src = this.src = this._path + this.file;
//add event handlers
this._addEventHandlers();
return this;
},
//Adds event handlers to update the counters when
//the image is successfully or unsuccessfully loaded
_addEventHandlers : function () {
var that = this;
that.media.addEventListener(
"load",
function (e) {
Karma._counters.loaded++;
Karma._updateStatus();
that.status = "loaded";}, false);
that.media.addEventListener(
"error",
function (e) {
Karma._counters.errors++;
that.status = "error";
var errorMsg = "Error: " + that._type.toUpperCase() +
" " + that.name + " cannot be loaded.";
Karma._updateStatus(errorMsg);
},
false);
that.media.addEventListener(
"abort",
function (e) {
Karma._counters.total++;
that.status = "aborted";
var errorMsg = "ABORT: " + that._type.toUpperCase() +
" " + that.name + " loading was aborted.";
Karma._updateStatus(errorMsg);
}, false);
}
};
/** Prototype object for audio files
* @class This object is the prototype for audio files submitted to Karma in the
* Karma() method
* @ throws {Error} if the individual audio asset is set to be localized but
* the globale locale is not set on the Karma object
* @ throws {Error} if the name and file properties are not supplied
* @example
* kAudio is the prototype object for audio
* The audio assets are loaded in a distinctly different way
* from the canvas or svg assets. They also have distinctly different
* helper methods
*
* You initialize the kAudio assets by passing an array of objects
*/
Karma.kAudio = {
/** file location of asset
* @type String
* @default ""
*/
file : "",
/** Media object. You can access the src, autobuffer, autoplay, loop, and
* controls attributes
* via the media property of kAudio. Read more about the properties of the <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/video.html#media-element-attributes">HTML 5 media element</a>
* @type Audio
* @default undefined
*/
media : undefined,
//actual path to the file
_path : "",
//if using localized version of this asset
_localized : false,
_type : "audio",
//initializes kAudio instance with values provided by user
_init : function (audio) {
audio._localized = audio._localized || false;
Karma._counters.total++;
if (audio.name === undefined || audio.file === undefined){
throw new Error("properties name and file have to be defined");
} else {
this.name = audio.name;
this.file = audio.file;
}
this.media = new Audio();
if(Karma._isLocalized(audio._localized)){
this._localized = audio._localized;
this._path = Karma._localePath + "audio/";
} else {
this._path = Karma._assetPath + "audio/";
}
//IMPORTANT: This one magic line loads the file
this.media.src = this.src = this._path + this.file;
//add event handlers
this._addEventHandlers();
this.media.autobuffer = true;
this.media.load();
return this;
},
//Adds event handlers to update the counters when
//the asset is successfully or unsuccessfully loaded
_addEventHandlers : function () {
var that = this;
//'canplaythrough' event is a Browser Hack recommended by chromium devs
//http://code.google.com/p/chromium/issues/detail?id=20251&q=loading%20audio&colspec=ID%20Stars%20Pri%20Area%20Type%20Status%20Summary%20Modified%20Owner%20Mstone%20OS#c4
that.media.addEventListener(
"canplaythrough",
function (e) {
Karma._counters.loaded++;
Karma._updateStatus();
that.status = "loaded";}, false);
that.media.addEventListener(
"error",
function (e) {
Karma._counters.errors++;
that.status = "error";
var errorMsg = "Error: " + that._type.toUpperCase() +
" " + that.name + " cannot be loaded.";
Karma._updateStatus(errorMsg);
},
false);
that.media.addEventListener(
"abort",
function (e) {
Karma._counters.total++;
that.status = "aborted";
var errorMsg = "ABORT: " + that._type.toUpperCase() +
" " + that.name + " loading was aborted.";
Karma._updateStatus(errorMsg);
}, false);
},
/** Plays the audio file */
play : function () {
this.media.play();
}
};
/** NYI:Prototype object for Video files
* @class Not Yet Implemented:This object is the prototype for video files submitted
* to Karma in the Karma() method
* @ throws {Error} if the individual video asset is set to be localized but
* the globale locale is not set on the Karma object
* @ throws {Error} if the name and file properties are not supplied
*/
Karma.kVideo = {
/** file location of asset
* @type String
* @default ""
*/
file : "",
/** media object
* @type Video
* @default undefined
*/
media : undefined,
//actual path to the file
_path : "",
//if using localized version of this asset
_localized : false,
_type : "video",
//initializes kVideo instance with values provided by user
_init : function (video) {
//Not Yet Implemented
Karma._counters.errors++;
throw new Error("Video is not Yet Implemented");
video._localized = video._localized || false;
Karma._counters.total++;
if (video.name === undefined || video.file === undefined){
throw new Error("properties name and file have to be defined");
} else {
this.name = video.name;
this.file = video.file;
}
this.media = new Video();
if(Karma._isLocalized(video._localized)){
this._localized = video._localized;
this._path = Karma._localePath + "video/";
} else {
this._path = Karma._assetPath + "video/";
}
//IMPORTANT: This one magic line loads the file
this.media.src = this.src = this._path + this.file;
//add event handlers
this._addEventHandlers();
return this;
},
//Adds event handlers to update the counters when
//the asset is successfully or unsuccessfully loaded
_addEventHandlers : function () {
var that = this;
//'canplaythrough' event is a Browser Hack recommended by chromium devs
//http://code.google.com/p/chromium/issues/detail?id=20251&q=loading%20audio&colspec=ID%20Stars%20Pri%20Area%20Type%20Status%20Summary%20Modified%20Owner%20Mstone%20OS#c4
that.media.addEventListener(
"canplaythrough",
function (e) {
Karma._counters.loaded++;
Karma._updateStatus();
that.status = "loaded";}, false);
that.media.addEventListener(
"error",
function (e) {
Karma._counters.errors++;
that.status = "error";
var errorMsg = "Error: " + that._type.toUpperCase() +
" " + that.name + " cannot be loaded.";
Karma._updateStatus(errorMsg);
},
false);
that.media.addEventListener(
"abort",
function (e) {
Karma._counters.total++;
that.status = "aborted";
var errorMsg = "ABORT: " + that._type.toUpperCase() +
" " + that.name + " loading was aborted.";
Karma._updateStatus(errorMsg);
}, false);
}
};
/** Prototype object for each canvas element submitted to Karma in the
* Karma() method
* @throws {Error} if the name and domId for the canvas element are not specified
* @thows {Error} if the supplied domId does not match an element in the DOM
* @class This object is the prototype for each canvas element submitted to Karma in the
* Karma() method
*/
Karma.kCanvas = {
/** Name of the canvas, used internally by karma.js
* @type String
* @default ''
*/
name : '',
/** Width of canvas element
* @type Number
* @default 0
*/
width: 0,
/** Height of canvas element
* @type Number
* @default 0
*/
height: 0,
/** Whether canvas is visible
* @type boolean
* @default true
*/
visible: true,
/** Element ID for canvas element in html document. This value is read-only
* @type String
* @default undefined
*/
domId: undefined,
/** Reference to the DOM element
* @type DOMElement
* @default undefined
* @example
* //You can access all properties and methods of the underlying DOM element
* //using the 'node' property
* Karma.canvas.someCanvas.node.dispatchEvent( ... some event ...);
* var stuff = Karma.canvas.someCanvas.node.innerHTML;
*
*/
node: undefined,
/** The 2 Dimensional Rendering context property for this canvas
* @type 2DRenderingContext
* @default undefined
* @example
* //Almost all of the context attributes and methods are wrapped in helper functions
* //but you can also access them directly using the ctx property
* Karma.canvas.someCanvas.ctx.drawImage(someImage, x, y);
* Karma.canvas.someCanvas.ctx.fillStyle = "#ffffff";
*/
ctx: undefined,
//initializes object with values provides by user
_init: function (config) {
for (var option in config){
if (config.hasOwnProperty(option)){
switch (option){
case "name":
this.name = config[option];
break;
case "domId":
this.domId = config[option];
break;
case "width":
if(!this.height){
throw new Error("If you specify a width you must also" +
"specify a height");
}
this.width = config[option];
break;
case "height":
if(!this.width){
throw new Error("If you specify a height you must also" +
"specify a width");
}
this.height = parseInt(config.option, 10);
break;
case "fps":
this.fps = parseInt(config.option, 10);
break;
}
}
}
if(this.domId && document.getElementById(this.domId)){
this.node = document.getElementById(this.domId);
this.ctx = this.node.getContext('2d');
} else {
throw new Error('you must specify a valid domId that' +
'is in your html page');
}
if(!config.height && !config.width){
this.width = parseInt(this.node.getAttribute('width'), 10);
this.height = parseInt(this.node.getAttribute('height'), 10);
}
return this;
},
/** Clear area of canvas element specified by parameters, if no
* parameters supplied, clears entire canvas
* @param {Number} [x=0] x coordinate, defaults to zero if left blank
* @param {Number} [y=0] y coordinate, defaults to zero if left blank
* @param {Number} [width=0] width of area to be cleared, defaults
* entire width of canvas
* @param {Number} [height=0] height of area to be cleared, defaults
* entire height of canvas
* @returns this
* @example
*
* k.canvas.ninja.clear();
* // clears the entire ninja canvas
*
* k.canvas.ninja.clear(0, 10, 20, 30);
* //clears a specific portion of the ninja canvas
*
*/
clear : function ( x, y, width, height ) {
var that = this;
that.ctx.clearRect(
x || 0,
y || 0,
width || that.width,
height || that.height
);
return that;
},
/** The globalAlpha attribute gives an alpha value that is applied to shapes
* and images before they are composited onto the canvas
* @param {Number} number in the range from 0.0 to 1.0
* @returns this
*/
globalAlpha : function (attribute){
var name = 'globalAlpha';
this.ctx[name] = attribute;
return this;
},
/** Sets the globalCompositeOperation attribute, which sets how shapes and images
* are drawn onto the existing bitmap, once they have had globalAlpha and the
* current transformation matrix applied.
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param {String} globalCompositeOperation source-atop,
* source-in, source-out,
* source-over, destination-atop, destination-in, destination-out, destination-over,
* lighter
* @returns this
*/
globalCompositeOperation: function (attribute){
var name = ' globalCompositeOperation';
this.ctx[name] = attribute;
return this;
},
/** Sets the lineWidth attribute which gives the width of lines, in coordinate space
* units.
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param {Number} lineWidth
* @returns this
*/
lineWidth: function (attribute){
var name = 'lineWidth';
this.ctx[name] = attribute;
return this;
},
/** The lineCap attribute defines the type of endings that UAs will place on
* the end of lines.
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param {String} type butt, round, square
* @returns this
*/
lineCap: function (attribute){
var name = 'lineCap';
this.ctx[name] = attribute;
return this;
},
/** The lineJoin attribute defines the type of corners that UAs will place
* where two lines meet. The three valid values are bevel, round, and miter.
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param {String} type
* @returns this
*/
lineJoin: function (attribute){
var name = 'lineJoin';
this.ctx[name] = attribute;
return this;
},
/** Sets the miter limit
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param {Number} number
* @returns this
*/
miterLimit: function (attribute){
var name = 'miterLimit';
this.ctx[name] = attribute;
return this;
},
/** Sets the font property and takes the same syntax as setting the font property
* in CSS
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param {String}
* @returns this
*/
font: function (attribute){
var name = 'font';
this.ctx[name] = attribute;
return this;
},
/** Changes the text alignment. The possible values are start, end, left, right,
* and center. The default is start. Other values are ignored.
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param {string} alignment
* @returns this
*/
textAlign: function (attribute){
var name = 'textAlign';
this.ctx[name] = attribute;
return this;
},
/** Changes the baseline alignment. If the value is one of top, hanging, middle,
* alphabetic, ideographic, or bottom, then the value must be changed to the new value.
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param {String} alignment
* @returns this
*/
textBaseline: function (attribute){
var name = 'textBaseline';
this.ctx[name] = attribute;
return this;
},
/** Save the current state of the context
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
save : function ( ){
var name = 'save';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
/** Restore the saved context
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
restore : function ( ){
var name = 'restore';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
/** Perform a scale transformation
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
scale : function ( ){
var name = 'scale';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
/** Perform a rotation transformation
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
rotate : function ( ){
var name = 'rotate';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
/** Performa a translation transformation
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
translate : function ( ){
var name = 'translate';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
/** Transform the identity matrix
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
transform : function ( ){
var name = 'transform';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
/** Set the transform
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
setTransform : function ( ){
var name = 'setTransform';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
/** Clear a rectangular area
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
clearRect : function ( ){
var name = 'clearRect';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
/** Fill a rectangular area
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
fillRect : function ( ){
var name = 'fillRect';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
/** Draw the outline of the rectangle
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
strokeRect : function ( ){
var name = 'strokeRect';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
/** Begin a path
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
beginPath : function ( ){
var name = 'beginPath';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
/** End a path
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
closePath : function ( ){
var name = 'closePath';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
/** Move to specified coordinates
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
moveTo : function ( ){
var name = 'moveTo';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
/** Draw a line to the given coordinates
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
lineTo : function ( ){
var name = 'lineTo';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
/** Draw a quadratic curve to given coordinates
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
quadraticCurveTo : function ( ){
var name = 'quadraticCurveTo';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
/** Draw a bezier curve to given coordinates
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
bezierCurveTo : function ( ){
var name = 'bezierCurveTo';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
/** Draw an arc to the given points
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
arcTo : function ( ){
var name = 'arcTo';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
/** Create an arc
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
arc : function ( ){
var name = 'arc';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
/** Create a rectangle
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
rect : function ( ){
var name = 'rect';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
/** fill in the current subpaths with the current fillstyle
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
fill : function ( ){
var name = 'fill';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
/** Stroke the subpaths
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
stroke : function ( ){
var name = 'stroke';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
/** description
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
clip : function ( ){
var name = 'clip';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
/** description
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
fillText : function ( ){
var name = 'fillText';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
/** description
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
strokeText : function ( ){
var name = 'strokeText';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
/** description
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
measureText : function ( ){
var name = 'measureText';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
/** description
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
isPointInPath : function ( ){
var name = 'isPointInPath';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
/** Sets the stroke style
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
strokeStyle: function (attribute){
var name = 'strokeStyle';
this.ctx[name] = attribute;
return this;
},
/** Sets the fill style
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
fillStyle: function (attribute){
var name = 'fillStyle';
this.ctx[name] = attribute;
return this;
},
/** description
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
createLinearGradient : function ( ){
var name = 'createLinearGradient';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
/** description
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
createRadialGradient : function ( ){
var name = 'createRadialGradient';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
/** description
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
createPattern : function ( ){
var name = 'createPattern';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
/** description
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
shadowOffsetX: function (attribute){
var name = 'shadowOffsetX';
this.ctx[name] = attribute;
return this;
},
/** description
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
shadowOffsetY: function (attribute){
var name = 'shadowOffsetY';
this.ctx[name] = attribute;
return this;
},
/** description
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
shadowBlur: function (attribute){
var name = 'shadowBlur';
this.ctx[name] = attribute;
return this;
},
/** description
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
shadowColor: function (attribute){
var name = 'shadowColor';
this.ctx[name] = attribute;
return this;
},
/** description
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
drawImage : function ( ){
var name = 'drawImage';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
/** description
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
getImageData : function ( ){
var name = 'getImageData';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
/** description
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
putImageData : function ( ){
var name = 'putImageData';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
/** description
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
createImageData : function ( ){
var name = 'createImageData';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
/** description
* For full details see <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-globalcompositeoperation">W3C docs</a>
* @param
* @returns this
*/
drawWindow : function ( ){
var name = 'drawWindow';
this.ctx[name].apply(this.ctx, arguments);
return this;
},
};
/** Prototype object for each svg element submitted to Karma in the
* Karma() method
* @throws {Error} if the name and domId for the svg element are not specified
* @thows {Error} if the supplied domId does not match an element in the DOM
* @class This object is the prototype for each svg element submitted to Karma in the
* Karma() method
*/
Karma.kSvg = {
/** name of instance, used internally
* @typeof string
* @default ""
*/
name : "",
/** width of element
* @type number
* @default 0
*/
width: 0,
/** height of element
* @type number
* @default 0
*/
height: 0,
/** Status of element, either "loaded" or "error"
* @type string
* @default ""
*/
status: "",
/** Whether canvas is visible. This value is read-only
* @type boolean
* @default true
*/
visible: true,
/** Element ID for canvas element in html document.
* @type String
* @default undefined
*/
domId: undefined,
/** Reference to the DOM element.
* @type DOMElement
* @default undefined
* @example
* //You can access all properties and methods of the underlying DOM element
* //using the 'node' property
* Karma.svg.someSvg.node.dispatchEvent;
* Karma.svg.someSvg.node.addEvenListener(...);
*/
node: undefined,
/** Reference to the SVGDocument. You can use the this.doc to manipulate
* the SVG document
* @type SVGDocument
* @default undefined
* @example
* var myElem = Karma.svg.someSvg.doc.getElementById('foobar');
* Karma.svg.someSvg.doc.createElement(...);
* Karma.svg.someSvg.doc.removeChild(someNode);
*
*/
doc: undefined,
/** Reference to the root element of the SVG Document
* @type DocumentElement
* @default undefined
* @example
* // The root element is equivalent to "document" in a regular html document
* // The root attribute is used frequently with the jQuery SVG plugin for CSS selectors
* $('#someId', Karma.svg.someSvg.root).css(.. manipulate css attributes ...);
*/
root: undefined,
_localized : undefined,
_init: function (config) {
Karma._counters.total++;
for (var option in config){
if (config.hasOwnProperty(option)){
switch (option){
case "name":
this.name = config[option];
break;
case "domId":
this.domId = config[option];
break;
case "width":
if(!this.height){
throw new Error("If you specify a width you must also" +
"specify a height");
}
this.width = parseInt(config[option], 10);
break;
case "height":
if(!this.width){
throw new Error("If you specify a height you must also" +
"specify a width");
}
this.height = config[option];
break;
}
}
}
if(this.domId && document.getElementById(this.domId)){
this.node = document.getElementById(this.domId);
} else {
throw new Error('you must specify a valid domId that' +
'is in your html page');
}
if(!config.height && !config.width){
this.width = parseInt(this.node.getAttribute('width'), 10);
this.height = parseInt(this.node.getAttribute('height'), 10);
}
var that = this;
that._addEventHandlers();
return this;
},
_addEventHandlers : function () {
var that = this;
that.doc = that.node.getSVGDocument();
that.node.addEventListener(
"load",
function (e) {
that.doc = that.node.getSVGDocument();
that.root = that.doc.documentElement;
Karma._counters.loaded++;
Karma._updateStatus();
that.status = "loaded";
}, false);
that.node.addEventListener(
"error",
function (e) {
Karma._counters.loaded--;
Karma._counters.errors++;
that.status = "error";
var errorMsg = "Error: " + that._type.toUpperCase() +
" " + that.name + " cannot be loaded.";
Karma._updateStatus(errorMsg);
},
false);
that.node.addEventListener(
"abort",
function (e) {
that.status = "aborted";
var errorMsg = "ABORT: " + that._type.toUpperCase() +
" " + that.name + " loading was aborted.";
Karma._updateStatus(errorMsg);
}, false);
}
};
|
