/* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ "use strict"; const EXPORTED_SYMBOLS = ["LinkHandlerChild"]; const { Services } = ChromeUtils.import("resource://gre/modules/Services.jsm"); ChromeUtils.defineModuleGetter( this, "FaviconLoader", "resource:///modules/FaviconLoader.jsm" ); class LinkHandlerChild extends JSWindowActorChild { constructor() { super(); this.seenTabIcon = false; this._iconLoader = null; } get iconLoader() { if (!this._iconLoader) { this._iconLoader = new FaviconLoader(this); } return this._iconLoader; } addRootIcon() { if ( !this.seenTabIcon && Services.prefs.getBoolPref("browser.chrome.guess_favicon", true) && Services.prefs.getBoolPref("browser.chrome.site_icons", true) ) { // Inject the default icon. Use documentURIObject so that we do the right // thing with about:-style error pages. See bug 453442 let pageURI = this.document.documentURIObject; if (["http", "https"].includes(pageURI.scheme)) { this.seenTabIcon = true; this.iconLoader.addDefaultIcon(pageURI); } } } onHeadParsed(event) { if (event.target.ownerDocument != this.document) { return; } // Per spec icons are meant to be in the tag so we should have seen // all the icons now so add the root icon if no other tab icons have been // seen. this.addRootIcon(); // We're likely done with icon parsing so load the pending icons now. if (this._iconLoader) { this._iconLoader.onPageShow(); } } onPageShow(event) { if (event.target != this.document) { return; } this.addRootIcon(); if (this._iconLoader) { this._iconLoader.onPageShow(); } } onPageHide(event) { if (event.target != this.document) { return; } if (this._iconLoader) { this._iconLoader.onPageHide(); } this.seenTabIcon = false; } onLinkEvent(event) { let link = event.target; // Ignore sub-frames (bugs 305472, 479408). if (link.ownerGlobal != this.contentWindow) { return; } let rel = link.rel && link.rel.toLowerCase(); // We also check .getAttribute, since an empty href attribute will give us // a link.href that is the same as the document. if (!rel || !link.href || !link.getAttribute("href")) { return; } // Note: following booleans only work for the current link, not for the // whole content let iconAdded = false; let searchAdded = false; let rels = {}; for (let relString of rel.split(/\s+/)) { rels[relString] = true; } for (let relVal in rels) { let isRichIcon = false; switch (relVal) { case "apple-touch-icon": case "apple-touch-icon-precomposed": case "fluid-icon": isRichIcon = true; // fall through case "icon": if (iconAdded || link.hasAttribute("mask")) { // Masked icons are not supported yet. break; } if (!Services.prefs.getBoolPref("browser.chrome.site_icons", true)) { return; } if (this.iconLoader.addIconFromLink(link, isRichIcon)) { iconAdded = true; if (!isRichIcon) { this.seenTabIcon = true; } } break; case "search": if ( Services.policies && !Services.policies.isAllowed("installSearchEngine") ) { break; } if (!searchAdded && event.type == "DOMLinkAdded") { let type = link.type && link.type.toLowerCase(); type = type.replace(/^\s+|\s*(?:;.*)?$/g, ""); // Note: This protocol list should be kept in sync with // the one in OpenSearchEngine's install function. let re = /^https?:/i; if ( type == "application/opensearchdescription+xml" && link.title && re.test(link.href) ) { let engine = { title: link.title, href: link.href }; this.sendAsyncMessage("Link:AddSearch", { engine, url: link.ownerDocument.documentURI, }); searchAdded = true; } } break; } } } handleEvent(event) { switch (event.type) { case "pageshow": return this.onPageShow(event); case "pagehide": return this.onPageHide(event); case "DOMHeadElementParsed": return this.onHeadParsed(event); default: return this.onLinkEvent(event); } } }