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/* 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/. */
const lazy = {};
ChromeUtils.defineESModuleGetters(lazy, {
FaviconLoader: "resource:///modules/FaviconLoader.sys.mjs",
});
export class LinkHandlerChild extends JSWindowActorChild {
constructor() {
super();
this.seenTabIcon = false;
this._iconLoader = null;
}
get iconLoader() {
if (!this._iconLoader) {
this._iconLoader = new lazy.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 <head> 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,
});
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);
}
}
}
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