b38dea0597
Share Gaia assets and adapters, keep private profiles and development documents local, and update both public READMEs.
97 lines
2.4 KiB
JavaScript
97 lines
2.4 KiB
JavaScript
'use strict';
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(function(exports) {
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/**
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* LogoLoader loads either a video or image for display during phone boot.
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* Only a single resource will be selected depending on what is availble
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* on the filesystem.
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* @class LogoLoader
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* @param {Object} logoPath Contains file paths for both a video and image.
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*/
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function LogoLoader(logoPath) {
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// Load video / image if exist.
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// Only one of them should success. We load both of them at the same time.
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this.videoPath = logoPath.video;
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this.imagePath = logoPath.image;
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this._noImage = false;
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this._noVideo = false;
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//Statuses
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this.ready = false;
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this.found = false;
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this.element = null;
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//Callback functions
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this.onnotfound = null;
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this.onload = null;
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this._initVideo();
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this._initImage();
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}
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LogoLoader.prototype = {
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/**
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* Tries to initialize a video if we can load it from disk.
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* @memberof LogoLoader.prototype
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*/
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_initVideo: function() {
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var video = document.createElement('video');
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video.preload = 'auto';
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video.src = this.videoPath;
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var self = this;
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video.onloadeddata = function() {
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self._onLogoLoaded(video);
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};
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video.onerror = function() {
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self._noVideo = true;
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if (self._noImage && (typeof self.onnotfound == 'function')) {
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self.ready = true;
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self.onnotfound();
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}
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};
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},
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/**
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* Tries to initialize an image if we can load it from disk.
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* @memberof LogoLoader.prototype
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*/
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_initImage: function() {
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var self = this;
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var img = new Image();
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img.src = this.imagePath;
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img.onload = function() {
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self._onLogoLoaded(img);
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};
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img.onerror = function() {
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self._noImage = true;
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if (self._noVideo && (typeof self.onnotfound == 'function')) {
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self.ready = true;
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self.onnotfound();
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}
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};
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},
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/**
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* Called when we have a logo resource ready.
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* @memberof LogoLoader.prototype
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* @param {HtmlElement} element An image or video element.
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*/
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_onLogoLoaded: function(element) {
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this.found = true;
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if (!this.ready) {
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this.ready = true;
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this.element = element;
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if (this.onload) {
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this.onload(element);
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}
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}
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}
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};
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exports.LogoLoader = LogoLoader;
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}(window));
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