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72 lines
1.7 KiB
72 lines
1.7 KiB
/**
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* @class Images
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* This class loads images and keeps them stored.
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*/
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function Images(callback) {
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this.images = {};
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this.imageBroken = {};
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this.callback = callback;
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}
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/**
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*
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* @param {string} url Url of the image
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* @param {string} url Url of an image to use if the url image is not found
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* @return {Image} img The image object
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*/
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Images.prototype.load = function(url, brokenUrl, id) {
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var img = this.images[url]; // make a pointer
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if (img === undefined) {
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// create the image
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var me = this;
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img = new Image();
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img.onload = function () {
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// IE11 fix -- thanks dponch!
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if (this.width === 0) {
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document.body.appendChild(this);
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this.width = this.offsetWidth;
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this.height = this.offsetHeight;
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document.body.removeChild(this);
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}
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if (me.callback) {
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me.images[url] = img;
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me.callback(this);
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}
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};
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img.onerror = function () {
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if (brokenUrl === undefined) {
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console.error("Could not load image:", url);
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delete this.src;
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if (me.callback) {
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me.callback(this);
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}
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}
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else {
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if (me.imageBroken[id] && me.imageBroken[id][url] === true) {
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console.error("Could not load brokenImage:", brokenUrl);
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delete this.src;
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if (me.callback) {
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me.callback(this);
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}
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}
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else {
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console.error("Could not load image:", url);
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this.src = brokenUrl;
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if (me.imageBroken[id] === undefined) {
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me.imageBroken[id] = {};
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}
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me.imageBroken[id][url] = true;
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}
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}
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};
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img.src = url;
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}
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return img;
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};
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module.exports = Images;
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