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127 lines
3.5 KiB
JavaScript
127 lines
3.5 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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"use strict";
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const { classes: Cc, interfaces: Ci, utils: Cu } = Components;
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this.EXPORTED_SYMBOLS = [ "switchToFloatingScrollbars", "switchToNativeScrollbars" ];
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Cu.import("resource://gre/modules/Services.jsm");
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let URL = Services.io.newURI("chrome://browser/skin/devtools/floating-scrollbars.css", null, null);
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let trackedTabs = new WeakMap();
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/**
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* Switch to floating scrollbars, à la mobile.
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*
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* @param aTab the targeted tab.
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*
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*/
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this.switchToFloatingScrollbars = function switchToFloatingScrollbars(aTab) {
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let mgr = trackedTabs.get(aTab);
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if (!mgr) {
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mgr = new ScrollbarManager(aTab);
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}
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mgr.switchToFloating();
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}
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/**
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* Switch to original native scrollbars.
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*
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* @param aTab the targeted tab.
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*
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*/
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this.switchToNativeScrollbars = function switchToNativeScrollbars(aTab) {
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let mgr = trackedTabs.get(aTab);
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if (mgr) {
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mgr.reset();
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}
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}
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function ScrollbarManager(aTab) {
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trackedTabs.set(aTab, this);
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this.attachedTab = aTab;
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this.attachedBrowser = aTab.linkedBrowser;
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this.reset = this.reset.bind(this);
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this.switchToFloating = this.switchToFloating.bind(this);
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this.attachedTab.addEventListener("TabClose", this.reset, true);
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this.attachedBrowser.addEventListener("DOMContentLoaded", this.switchToFloating, true);
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}
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ScrollbarManager.prototype = {
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get win() {
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return this.attachedBrowser.contentWindow;
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},
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/*
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* Change the look of the scrollbars.
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*/
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switchToFloating: function() {
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let windows = this.getInnerWindows(this.win);
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windows.forEach(this.injectStyleSheet);
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this.forceStyle();
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},
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/*
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* Reset the look of the scrollbars.
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*/
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reset: function() {
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let windows = this.getInnerWindows(this.win);
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windows.forEach(this.removeStyleSheet);
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this.forceStyle(this.attachedBrowser);
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this.attachedBrowser.removeEventListener("DOMContentLoaded", this.switchToFloating, true);
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this.attachedTab.removeEventListener("TabClose", this.reset, true);
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trackedTabs.delete(this.attachedTab);
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},
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/*
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* Toggle the display property of the window to force the style to be applied.
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*/
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forceStyle: function() {
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let parentWindow = this.attachedBrowser.ownerDocument.defaultView;
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let display = parentWindow.getComputedStyle(this.attachedBrowser).display; // Save display value
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this.attachedBrowser.style.display = "none";
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parentWindow.getComputedStyle(this.attachedBrowser).display; // Flush
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this.attachedBrowser.style.display = display; // Restore
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},
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/*
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* return all the window objects present in the hiearchy of a window.
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*/
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getInnerWindows: function(win) {
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let iframes = win.document.querySelectorAll("iframe");
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let innerWindows = [];
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for (let iframe of iframes) {
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innerWindows = innerWindows.concat(this.getInnerWindows(iframe.contentWindow));
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}
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return [win].concat(innerWindows);
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},
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/*
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* Append the new scrollbar style.
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*/
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injectStyleSheet: function(win) {
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let winUtils = win.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIDOMWindowUtils);
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try {
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winUtils.loadSheet(URL, win.AGENT_SHEET);
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}catch(e) {}
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},
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/*
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* Remove the injected stylesheet.
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*/
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removeStyleSheet: function(win) {
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let winUtils = win.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIDOMWindowUtils);
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try {
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winUtils.removeSheet(URL, win.AGENT_SHEET);
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}catch(e) {}
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},
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}
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