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<!--
@license
Copyright (c) 2016 The Polymer Project Authors. All rights reserved.
This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
Code distributed by Google as part of the polymer project is also
subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
-->
<link rel="import" href="../../../polymer/polymer.html">
<link rel="import" href="../../../google-youtube/google-youtube.html">
<!--
youtube-lite provides a simple subset of the google-youtube element's API. By
simplifying the API we're also able to make it more amenable to two-way data
binding.
Note that this element is totally agnostic to routing!
-->
<dom-module id="youtube-lite">
<template>
<style>
:host {
display: block;
position: relative;
width: 100%;
}
google-youtube {
height: 100%;
}
</style>
<google-youtube
id="player"
video-id="{{videoId}}"
state="{{__state}}"
currenttime="{{__currentTime}}"
width="100%"
height="100%">
</google-youtube>
</template>
<script>
Polymer({
is: 'youtube-lite',
properties: {
videoId: {
type: String,
notify: true
},
state: {
type: String,
notify: true,
observer: '_stateChanged'
},
currentTime: {
type: Number,
notify: true,
observer: '_currentTimeChanged'
},
startTime: {
type: Number
},
__state: {
type: String,
observer: '__ytApiStateChange'
},
__currentTime: {
type: String,
observer: '_ytCurrentTimeChanged'
},
__pauseOnFirstSeek: {
type: Boolean
}
},
listeners: {
'google-youtube-ready': '_onYoutubeReady'
},
_seekTo: function(newTime) {
var player = this.$.player;
if (player.duration == 1 || newTime < player.duration) {
player.seekTo(newTime);
}
},
_onYoutubeReady: function() {
this.__pauseOnFirstSeek = this.state == 'paused';
if (!this.__pauseOnFirstSeek || this.startTime) {
this._seekTo(this.startTime);
}
},
_currentTimeChanged: function(newTime, oldTime) {
var apiState = this.__readableStateToApiState(this.state);
if (apiState != 2 || this.__state != 2) {
return;
}
this._seekTo(newTime);
},
_ytCurrentTimeChanged: function(ytCurrentTime) {
if (this.__state === this.__apiStates.PAUSED) {
return;
}
this.currentTime = ytCurrentTime;
},
_stateChanged: function(newState, oldState) {
var newApiState = this.__readableStateToApiState(newState);
if (newApiState == this.__state ||
this.__state == this.__apiStates.UNSTARTED) {
return;
}
this.currentTime = this.__currentTime;
var player = this.$.player;
switch (newApiState) {
case this.__apiStates.PLAYING:
player.play();
break;
case this.__apiStates.PAUSED:
player.pause();
break;
default:
return;
}
},
__ytApiStateChange: function(newState, oldState) {
var readableState;
switch (newState) {
case this.__apiStates.ENDED:
readableState = this.__states.PAUSED;
break;
case this.__apiStates.PLAYING:
readableState = this.__states.PLAYING;
break;
case this.__apiStates.PAUSED:
readableState = this.__states.PAUSED;
break;
default:
return;
}
if (this.state == readableState) {
return;
}
if (this.__pauseOnFirstSeek && readableState == this.__states.PLAYING) {
this.__pauseOnFirstSeek = false;
this.$.player.pause();
return;
}
this.state = readableState;
this.currentTime = this.__currentTime;
},
__readableStateToApiState: function(readableState) {
var newApiState = -2;
if (readableState == this.__states.PLAYING) {
newApiState = this.__apiStates.PLAYING;
} else if (readableState = this.__states.PAUSED) {
newApiState = this.__apiStates.PAUSED;
}
return newApiState;
},
__states: {
PLAYING: 'playing',
PAUSED: 'paused'
},
__apiStates: {
UNSTARTED: -1,
ENDED: 0,
PLAYING: 1,
PAUSED: 2,
BUFFERING: 3,
QUEUED: 5
}
});
</script>
</dom-module>
|
