/*!
*
* Version: 1.8.0
* Author: Gianluca Guarini
* Contact: gianluca.guarini@gmail.com
* Website: http://www.gianlucaguarini.com/
* Twitter: @gianlucaguarini
*
* Copyright (c) Gianluca Guarini
*
* 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.
**/
/*global console*/
(function($) {
'use strict';
$.html5Loader = function(customOptions) {
var defaults = {
filesToLoad: null,
/* set the path to the JSON or pass an object containing the files to preload */
debugMode: false,
/**
* do not execute the javascript files when they'll be preloaded
* this option could be overridden into the json per each javascript file
* @type {Boolean}
*/
stopExecution: false,
/**
* decide the the buffer size before considering the media preloaded
* by default it's the 20% of the entire size of the media file
* Pay attention, many browsers cannot preload the entire media files, they just buffer luckily the half (or less) of them
* more info: http://www.stevesouders.com/blog/2013/04/12/html5-video-preload/
* @type {Float}
*/
mediaBufferSizeToPreload: 0.2,
/* let the browser decide when the media file has been buffered enough to be played by listening the canplaythrough event */
forceMediaPreload: true,
/* script files won't execute when loaded */
onBeforeLoad: function() {},
/* this functions is triggered before the preloader starts loading the sources */
onComplete: function() {},
/* set the onComplete is triggered when everything is loaded */
onElementLoaded: function(obj, elm) {},
/* this Callback is triggered anytime an object is loaded */
onUpdate: function(percentage) {},
/* this function returns alway the current percentage */
onMediaError: function(obj, elm) {} /* This function is invoked in case of any error occurred during the media element fetch*/
},
// merging the custom options with the default ones
options = $.extend(defaults, customOptions);
/*
*
* PUBLIC VAR
* Configuration
*
*/
var filesToLoad = options.filesToLoad,
debugMode = options.debugMode,
mediaBufferSizeToPreload = options.mediaBufferSizeToPreload,
forceMediaPreload = options.forceMediaPreload,
stopExecution = options.stopExecution,
onBeforeLoad = options.onBeforeLoad,
onComplete = options.onComplete,
onElementLoaded = options.onElementLoaded,
onUpdate = options.onUpdate,
onMediaError = options.onMediaError;
/*
*
* PRIVATE VARS
*
*/
var $head = $('head'),
_currentSegment = 0,
_bytesLoaded = 0,
_bytesTotal = 0,
_files = [],
_isTablet = navigator.userAgent.match(/iPad|Android|(?=.*\bWindows\b)(?=.*\bARM\b)/i),
_isMobile = (function(a) {
if (/android.+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|meego.+mobile|midp|mmp|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows (ce|phone)|xda|xiino/i.test(a) || /1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(di|rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i.test(a.substr(0, 4))) return true;
else return false;
})(navigator.userAgent || navigator.vendor || window.opera),
_support = {};
/*
*
* PRIVATE METHODS
*
*/
/*
*
* @description Used to debug the application
* @param msg: {string, object, function, array} anything we need to log in the console
*
*/
var log = function(msg) {
if (debugMode && console) {
console.log(msg);
}
};
/*
*
* @description Check the support for HTML5 video and audio tags
* @link http://modernizr.com/
*
*/
_support.video = function() {
/* jshint -W053 */
var elem = document.createElement('video'),
bool = false;
// IE9 Running on Windows Server SKU can cause an exception to be thrown, bug #224
try {
if (!!elem.canPlayType) {
bool = {
ogg: elem.canPlayType('video/ogg; codecs="theora"').replace(/^no$/, ''),
// Without QuickTime, this value will be `undefined`. github.com/Modernizr/Modernizr/issues/546
h264: elem.canPlayType('video/mp4; codecs="avc1.42E01E"').replace(/^no$/, ''),
webm: elem.canPlayType('video/webm; codecs="vp8, vorbis"').replace(/^no$/, ''),
vp9: elem.canPlayType('video/webm; codecs="vp9"').replace(/^no$/, '')
};
// backward compatibility
bool.mp4 = bool.h264;
}
} catch (e) {}
return bool;
}();
_support.audio = function() {
/* jshint -W053 */
var elem = document.createElement('audio');
var bool = false;
try {
if (!!elem.canPlayType) {
bool = {
ogg: elem.canPlayType('audio/ogg; codecs="vorbis"').replace(/^no$/, ''),
mp3: elem.canPlayType('audio/mpeg;').replace(/^no$/, ''),
opus: elem.canPlayType('audio/ogg; codecs="opus"').replace(/^no$/, ''),
// Mimetypes accepted:
// developer.mozilla.org/En/Media_formats_supported_by_the_audio_and_video_elements
// bit.ly/iphoneoscodecs
wav: elem.canPlayType('audio/wav; codecs="1"').replace(/^no$/, ''),
m4a: (elem.canPlayType('audio/x-m4a;') ||
elem.canPlayType('audio/aac;')).replace(/^no$/, '')
};
}
} catch (e) {}
return bool;
}();
/**
*
* Check the svg support
*
*/
_support.svg = function() {
return !!document.createElementNS && !!document.createElementNS('http://www.w3.org/2000/svg', 'svg').createSVGRect;
}();
/*
*
* @description Loops on the available source files to find the right one to preload
* @param file: {object} the node that we need to parse to check the source supported
*
*/
var findSupportedSource = function(file) {
var type = file.type.toLowerCase(),
sources = file.sources;
$.each(sources, function(tmpSource) {
if (_support[type][tmpSource]) {
file = file.sources[tmpSource];
file.type = type.toUpperCase();
return false;
}
});
if (file.source) {
return file;
} else {
return false;
}
};
/*
*
* @description Output the current percentage using the onUpdate function passed as parameter to the loader
*
*/
var updatePercentage = function() {
var currPercentage = 0;
log('_bytesTotal = ' + _bytesTotal);
log('_bytesLoaded = ' + _bytesLoaded);
currPercentage = Math.round((_bytesLoaded / _bytesTotal) * 100);
log('Percentage: ' + currPercentage + '%');
onUpdate(currPercentage);
if (!_files[_currentSegment].length) {
// Is there another group of files.
_currentSegment++;
if (_files[_currentSegment]) {
startLoading();
} else {
onComplete();
}
}
};
/*
*
* @description Populate the _files array increasing the _bytesTotal var
* @param index: file index
* @param obj: the json node representing the file properties
*
*/
var arrangeData = function(segmentIndex, index, obj) {
var file = obj;
if (file.type === 'VIDEO' || file.type === 'AUDIO') {
file = findSupportedSource(file);
}
if (file) {
_bytesTotal += file.size;
_files[segmentIndex].push(file);
}
};
/*
*
* @description Deal with data received from the json loaded
* @param data: object
*
*/
var onJsonLoaded = function(data) {
var segment;
log('json loaded');
if (!data.files[0].length) {
data.files = [data.files];
}
for (var i = 0, l = data.files.length; i < l; i++) {
_files.push([]);
segment = data.files[i];
for (var m = 0, n = segment.length; m < n; m++) {
arrangeData(i, m, segment[m]);
}
}
};
/*
*
* @description Load any kind of image
* @param file: object
*
*/
var loadImage = function(file) {
var defer = new $.Deferred(),
size = file.size,
$image = $(''),
onImageLoaded = function() {
log('File Loaded:' + src);
_bytesLoaded += size;
onElementLoaded(file, this);
// removing the file from the array
_files[_currentSegment].splice(0, 1);
updatePercentage();
defer.resolve();
},
src;
// load the svg or the fallback image
if (file.source.toString() === '[object Object]') {
if (file.source.svg && _support.svg) {
src = file.source.svg;
} else if (file.source.fallback) {
src = file.source.fallback;
}
} else {
src = file.source;
}
$image.on('load', onImageLoaded);
$image.attr('src', src);
// preventing a memory leak
$image = null;
return defer.promise();
};
/*
*
* @description Load video or audio files
* @param file: object
*
*/
var loadMedia = function(file) {
var defer = new $.Deferred(),
size = file.size,
$media = file.type === 'VIDEO' ? $('