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/*
* blueimp Gallery YouTube Video Factory JS
* https://github.com/blueimp/Gallery
*
* Copyright 2013, Sebastian Tschan
* https://blueimp.net
*
* Licensed under the MIT license:
* https://opensource.org/licenses/MIT
*/
/* global define, YT */
;(function (factory) {
'use strict'
if (typeof define === 'function' && define.amd) {
// Register as an anonymous AMD module:
define(['./blueimp-helper', './blueimp-gallery-video'], factory)
} else {
// Browser globals:
factory(window.blueimp.helper || window.jQuery, window.blueimp.Gallery)
}
})(function ($, Gallery) {
'use strict'
if (!window.postMessage) {
return Gallery
}
var galleryPrototype = Gallery.prototype
$.extend(galleryPrototype.options, {
// The list object property (or data attribute) with the YouTube video id:
youTubeVideoIdProperty: 'youtube',
// Optional object with parameters passed to the YouTube video player:
// https://developers.google.com/youtube/player_parameters
youTubePlayerVars: {
wmode: 'transparent'
},
// Require a click on the native YouTube player for the initial playback:
youTubeClickToPlay: false
})
var textFactory =
galleryPrototype.textFactory || galleryPrototype.imageFactory
var YouTubePlayer = function (videoId, playerVars, clickToPlay) {
this.videoId = videoId
this.playerVars = playerVars
this.clickToPlay = clickToPlay
this.element = document.createElement('div')
this.listeners = {}
}
$.extend(YouTubePlayer.prototype, {
on: function (type, func) {
this.listeners[type] = func
return this
},
loadAPI: function () {
var that = this
var onYouTubeIframeAPIReady = window.onYouTubeIframeAPIReady
var apiUrl = '//www.youtube.com/iframe_api'
var scriptTags = document.getElementsByTagName('script')
var i = scriptTags.length
var scriptTag
window.onYouTubeIframeAPIReady = function () {
if (onYouTubeIframeAPIReady) {
onYouTubeIframeAPIReady.apply(this)
}
if (that.playOnReady) {
that.play()
}
}
while (i) {
i -= 1
if (scriptTags[i].src === apiUrl) {
return
}
}
scriptTag = document.createElement('script')
scriptTag.src = apiUrl
scriptTags[0].parentNode.insertBefore(scriptTag, scriptTags[0])
},
onReady: function () {
this.ready = true
if (this.playOnReady) {
this.play()
}
},
onPlaying: function () {
if (this.playStatus < 2) {
this.listeners.playing()
this.playStatus = 2
}
},
onPause: function () {
this.listeners.pause()
delete this.playStatus
},
onStateChange: function (event) {
window.clearTimeout(this.pauseTimeout)
switch (event.data) {
case YT.PlayerState.PLAYING:
this.hasPlayed = true
this.onPlaying()
break
case YT.PlayerState.UNSTARTED:
case YT.PlayerState.PAUSED:
// YouTube sends an unstarted event if pause is triggered before the
// video has started.
// YouTube sends a pause event when seeking.
// In both cases, we initiate a pause in a timeout that gets cleared
// if followed by another event within the timeout window.
this.pauseTimeout = galleryPrototype.setTimeout.call(
this,
this.onPause,
null,
500
)
break
case YT.PlayerState.ENDED:
this.onPause()
break
}
},
onError: function (event) {
this.listeners.error(event)
},
play: function () {
var that = this
if (!this.playStatus) {
this.listeners.play()
this.playStatus = 1
}
if (this.ready) {
if (
!this.hasPlayed &&
(this.clickToPlay ||
(window.navigator &&
/iP(hone|od|ad)/.test(window.navigator.platform)))
) {
// Manually trigger the playing callback if clickToPlay
// is enabled and to workaround a limitation in iOS,
// which requires synchronous user interaction to start
// the video playback:
this.onPlaying()
} else {
this.player.playVideo()
}
} else {
this.playOnReady = true
if (!(window.YT && YT.Player)) {
this.loadAPI()
} else if (!this.player) {
this.player = new YT.Player(this.element, {
videoId: this.videoId,
playerVars: this.playerVars,
events: {
onReady: function () {
that.onReady()
},
onStateChange: function (event) {
that.onStateChange(event)
},
onError: function (event) {
that.onError(event)
}
}
})
}
}
},
pause: function () {
if (this.ready) {
this.player.pauseVideo()
} else if (this.playStatus) {
delete this.playOnReady
this.listeners.pause()
delete this.playStatus
}
}
})
$.extend(galleryPrototype, {
YouTubePlayer: YouTubePlayer,
textFactory: function (obj, callback) {
var options = this.options
var videoId = this.getItemProperty(obj, options.youTubeVideoIdProperty)
if (videoId) {
if (this.getItemProperty(obj, options.urlProperty) === undefined) {
obj[options.urlProperty] = '//www.youtube.com/watch?v=' + videoId
}
if (
this.getItemProperty(obj, options.videoPosterProperty) === undefined
) {
obj[options.videoPosterProperty] =
'//img.youtube.com/vi/' + videoId + '/maxresdefault.jpg'
}
return this.videoFactory(
obj,
callback,
new YouTubePlayer(
videoId,
options.youTubePlayerVars,
options.youTubeClickToPlay
)
)
}
return textFactory.call(this, obj, callback)
}
})
return Gallery
})
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