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129 lines
3.2 KiB
129 lines
3.2 KiB
"use strict";
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const conversions = require("webidl-conversions");
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const HTMLElementImpl = require("./HTMLElement-impl").implementation;
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const { Canvas, reflectURLAttribute } = require("../../utils");
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class HTMLImageElementImpl extends HTMLElementImpl {
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_attrModified(name, value, oldVal) {
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if (name === "src" && value !== oldVal) {
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const document = this._ownerDocument;
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if (Canvas) {
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let error;
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if (!this._image) {
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this._image = new Canvas.Image();
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// Install an error handler that just remembers the error. It is then
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// thrown in the callback of resourceLoader.fetch() below.
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this._image.onerror = function (err) {
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error = err;
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};
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}
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this._currentSrc = null;
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if (this.hasAttributeNS(null, "src")) {
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const resourceLoader = document._resourceLoader;
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let request;
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const onLoadImage = data => {
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const { response } = request;
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if (response && response.statusCode !== undefined && response.statusCode !== 200) {
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throw new Error("Status code: " + response.statusCode);
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}
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error = null;
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this._image.src = data;
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if (error) {
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throw new Error(error);
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}
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this._currentSrc = value;
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};
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request = resourceLoader.fetch(this.src, {
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element: this,
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onLoad: onLoadImage
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});
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} else {
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this._image.src = "";
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}
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}
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}
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super._attrModified(name, value, oldVal);
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}
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get _accept() {
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return "image/png,image/*;q=0.8,*/*;q=0.5";
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}
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get src() {
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return reflectURLAttribute(this, "src");
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}
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set src(value) {
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this.setAttributeNS(null, "src", value);
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}
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get srcset() {
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return conversions.USVString(this.getAttributeNS(null, "srcset"));
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}
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set srcset(value) {
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this.setAttributeNS(null, "srcset", value);
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}
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get height() {
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// Just like on browsers, if no width / height is defined, we fall back on the
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// dimensions of the internal image data.
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return this.hasAttributeNS(null, "height") ?
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conversions["unsigned long"](this.getAttributeNS(null, "height")) :
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this.naturalHeight;
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}
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set height(V) {
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this.setAttributeNS(null, "height", String(V));
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}
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get width() {
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return this.hasAttributeNS(null, "width") ?
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conversions["unsigned long"](this.getAttributeNS(null, "width")) :
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this.naturalWidth;
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}
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set width(V) {
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this.setAttributeNS(null, "width", String(V));
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}
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get naturalHeight() {
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return this._image ? this._image.naturalHeight : 0;
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}
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get naturalWidth() {
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return this._image ? this._image.naturalWidth : 0;
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}
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get complete() {
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return Boolean(this._image && this._image.complete);
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}
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get currentSrc() {
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return this._currentSrc || "";
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}
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get lowsrc() {
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return reflectURLAttribute(this, "lowsrc");
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}
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set lowsrc(value) {
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this.setAttributeNS(null, "lowsrc", value);
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}
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get longDesc() {
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return reflectURLAttribute(this, "longdesc");
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}
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set longDesc(value) {
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this.setAttributeNS(null, "longdesc", value);
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}
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}
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module.exports = {
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implementation: HTMLImageElementImpl
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};
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