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a3f34fb4b7
This leaves our firefox diff to gecko instrumentation changes only. Drive-by: rename webkit "src" folder into "embedder".
90 lines
3.3 KiB
JavaScript
90 lines
3.3 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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const Ci = Components.interfaces;
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const Cr = Components.results;
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const Cu = Components.utils;
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const Cc = Components.classes;
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const {Helper} = ChromeUtils.import('chrome://juggler/content/Helper.js');
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const {Services} = ChromeUtils.import("resource://gre/modules/Services.jsm");
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const HIDDEN_SCROLLBARS = Services.io.newURI('chrome://juggler/content/content/hidden-scrollbars.css');
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const FLOATING_SCROLLBARS = Services.io.newURI('chrome://juggler/content/content/floating-scrollbars.css');
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const isHeadless = Cc["@mozilla.org/gfx/info;1"].getService(Ci.nsIGfxInfo).isHeadless;
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const helper = new Helper();
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class ScrollbarManager {
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constructor(docShell) {
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this._docShell = docShell;
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this._customScrollbars = null;
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this._contentViewerScrollBars = new Map();
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if (isHeadless)
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this._setCustomScrollbars(HIDDEN_SCROLLBARS);
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const webProgress = this._docShell.QueryInterface(Ci.nsIInterfaceRequestor)
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.getInterface(Ci.nsIWebProgress);
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this.QueryInterface = ChromeUtils.generateQI(['nsIWebProgressListener', 'nsISupportsWeakReference']);
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this._eventListeners = [
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helper.addProgressListener(webProgress, this, Ci.nsIWebProgress.NOTIFY_ALL),
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];
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}
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onLocationChange(webProgress, request, URI, flags) {
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if (flags & Ci.nsIWebProgressListener.LOCATION_CHANGE_SAME_DOCUMENT)
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return;
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this._updateAllDocShells();
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}
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setFloatingScrollbars(enabled) {
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if (this._customScrollbars === HIDDEN_SCROLLBARS)
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return;
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this._setCustomScrollbars(enabled ? FLOATING_SCROLLBARS : null);
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}
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_setCustomScrollbars(customScrollbars) {
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if (this._customScrollbars === customScrollbars)
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return;
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this._customScrollbars = customScrollbars;
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this._updateAllDocShells();
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}
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_updateAllDocShells() {
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const allDocShells = [this._docShell];
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for (let i = 0; i < this._docShell.childCount; i++)
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allDocShells.push(this._docShell.getChildAt(i).QueryInterface(Ci.nsIDocShell));
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// At this point, a content viewer might not be loaded for certain docShells.
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// Scrollbars will be updated in onLocationChange.
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const contentViewers = allDocShells.map(docShell => docShell.contentViewer).filter(contentViewer => !!contentViewer);
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// Update scrollbar stylesheets.
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for (const contentViewer of contentViewers) {
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const oldScrollbars = this._contentViewerScrollBars.get(contentViewer);
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if (oldScrollbars === this._customScrollbars)
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continue;
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const winUtils = contentViewer.DOMDocument.defaultView.windowUtils;
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if (oldScrollbars)
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winUtils.removeSheet(oldScrollbars, winUtils.AGENT_SHEET);
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if (this._customScrollbars)
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winUtils.loadSheet(this._customScrollbars, winUtils.AGENT_SHEET);
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}
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// Update state for all *existing* docShells.
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this._contentViewerScrollBars.clear();
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for (const contentViewer of contentViewers)
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this._contentViewerScrollBars.set(contentViewer, this._customScrollbars);
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}
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dispose() {
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this._setCustomScrollbars(null);
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helper.removeListeners(this._eventListeners);
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}
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}
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var EXPORTED_SYMBOLS = ['ScrollbarManager'];
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this.ScrollbarManager = ScrollbarManager;
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