forked from mirrors/gecko-dev
592 lines
17 KiB
JavaScript
592 lines
17 KiB
JavaScript
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/* 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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/**
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* Tab previews utility, produces thumbnails
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*/
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var tabPreviews = {
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init: function tabPreviews_init() {
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if (this._selectedTab)
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return;
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this._selectedTab = gBrowser.selectedTab;
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gBrowser.tabContainer.addEventListener("TabSelect", this);
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gBrowser.tabContainer.addEventListener("SSTabRestored", this);
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let screenManager = Cc["@mozilla.org/gfx/screenmanager;1"]
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.getService(Ci.nsIScreenManager);
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let left = {}, top = {}, width = {}, height = {};
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screenManager.primaryScreen.GetRectDisplayPix(left, top, width, height);
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this.aspectRatio = height.value / width.value;
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},
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get: function tabPreviews_get(aTab) {
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let uri = aTab.linkedBrowser.currentURI.spec;
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if (aTab.__thumbnail_lastURI &&
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aTab.__thumbnail_lastURI != uri) {
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aTab.__thumbnail = null;
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aTab.__thumbnail_lastURI = null;
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}
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if (aTab.__thumbnail)
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return aTab.__thumbnail;
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if (aTab.getAttribute("pending") == "true") {
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let img = new Image;
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img.src = PageThumbs.getThumbnailURL(uri);
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return img;
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}
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return this.capture(aTab, !aTab.hasAttribute("busy"));
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},
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capture: function tabPreviews_capture(aTab, aShouldCache) {
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let browser = aTab.linkedBrowser;
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let uri = browser.currentURI.spec;
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let canvas = PageThumbs.createCanvas(window);
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PageThumbs.shouldStoreThumbnail(browser, (aDoStore) => {
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if (aDoStore && aShouldCache) {
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PageThumbs.captureAndStore(browser, function() {
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let img = new Image;
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img.src = PageThumbs.getThumbnailURL(uri);
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aTab.__thumbnail = img;
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aTab.__thumbnail_lastURI = uri;
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canvas.getContext("2d").drawImage(img, 0, 0);
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});
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} else {
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PageThumbs.captureToCanvas(browser, canvas, () => {
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if (aShouldCache) {
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aTab.__thumbnail = canvas;
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aTab.__thumbnail_lastURI = uri;
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}
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});
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}
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});
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return canvas;
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},
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handleEvent: function tabPreviews_handleEvent(event) {
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switch (event.type) {
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case "TabSelect":
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if (this._selectedTab &&
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this._selectedTab.parentNode &&
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!this._pendingUpdate) {
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// Generate a thumbnail for the tab that was selected.
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// The timeout keeps the UI snappy and prevents us from generating thumbnails
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// for tabs that will be closed. During that timeout, don't generate other
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// thumbnails in case multiple TabSelect events occur fast in succession.
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this._pendingUpdate = true;
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setTimeout(function(self, aTab) {
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self._pendingUpdate = false;
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if (aTab.parentNode &&
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!aTab.hasAttribute("busy") &&
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!aTab.hasAttribute("pending"))
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self.capture(aTab, true);
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}, 2000, this, this._selectedTab);
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}
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this._selectedTab = event.target;
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break;
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case "SSTabRestored":
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this.capture(event.target, true);
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break;
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}
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}
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};
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var tabPreviewPanelHelper = {
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opening(host) {
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host.panel.hidden = false;
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var handler = this._generateHandler(host);
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host.panel.addEventListener("popupshown", handler);
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host.panel.addEventListener("popuphiding", handler);
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host._prevFocus = document.commandDispatcher.focusedElement;
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},
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_generateHandler(host) {
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var self = this;
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return function(event) {
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if (event.target == host.panel) {
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host.panel.removeEventListener(event.type, arguments.callee);
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self["_" + event.type](host);
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}
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};
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},
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_popupshown(host) {
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if ("setupGUI" in host)
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host.setupGUI();
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},
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_popuphiding(host) {
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if ("suspendGUI" in host)
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host.suspendGUI();
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if (host._prevFocus) {
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Services.focus.setFocus(host._prevFocus, Ci.nsIFocusManager.FLAG_NOSCROLL);
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host._prevFocus = null;
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} else
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gBrowser.selectedBrowser.focus();
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if (host.tabToSelect) {
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gBrowser.selectedTab = host.tabToSelect;
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host.tabToSelect = null;
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}
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}
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};
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/**
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* Ctrl-Tab panel
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*/
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var ctrlTab = {
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get panel() {
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delete this.panel;
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return this.panel = document.getElementById("ctrlTab-panel");
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},
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get showAllButton() {
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delete this.showAllButton;
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return this.showAllButton = document.getElementById("ctrlTab-showAll");
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},
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get previews() {
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delete this.previews;
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return this.previews = this.panel.getElementsByClassName("ctrlTab-preview");
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},
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get maxTabPreviews() {
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delete this.maxTabPreviews;
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return this.maxTabPreviews = this.previews.length - 1;
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},
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get canvasWidth() {
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delete this.canvasWidth;
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return this.canvasWidth = Math.ceil(screen.availWidth * .85 / this.maxTabPreviews);
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},
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get canvasHeight() {
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delete this.canvasHeight;
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return this.canvasHeight = Math.round(this.canvasWidth * tabPreviews.aspectRatio);
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},
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get keys() {
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var keys = {};
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["close", "find", "selectAll"].forEach(function(key) {
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keys[key] = document.getElementById("key_" + key)
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.getAttribute("key")
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.toLocaleLowerCase().charCodeAt(0);
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});
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delete this.keys;
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return this.keys = keys;
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},
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_selectedIndex: 0,
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get selected() {
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return this._selectedIndex < 0 ?
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document.activeElement :
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this.previews.item(this._selectedIndex);
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},
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get isOpen() {
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return this.panel.state == "open" || this.panel.state == "showing" || this._timer;
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},
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get tabCount() {
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return this.tabList.length;
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},
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get tabPreviewCount() {
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return Math.min(this.maxTabPreviews, this.tabCount);
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},
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get tabList() {
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return this._recentlyUsedTabs;
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},
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init: function ctrlTab_init() {
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if (!this._recentlyUsedTabs) {
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tabPreviews.init();
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this._initRecentlyUsedTabs();
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this._init(true);
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}
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},
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uninit: function ctrlTab_uninit() {
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if (this._recentlyUsedTabs) {
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this._recentlyUsedTabs = null;
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this._init(false);
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}
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},
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prefName: "browser.ctrlTab.previews",
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readPref: function ctrlTab_readPref() {
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var enable =
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gPrefService.getBoolPref(this.prefName) &&
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!gPrefService.getBoolPref("browser.ctrlTab.disallowForScreenReaders", false);
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if (enable)
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this.init();
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else
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this.uninit();
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},
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observe(aSubject, aTopic, aPrefName) {
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this.readPref();
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},
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updatePreviews: function ctrlTab_updatePreviews() {
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for (let i = 0; i < this.previews.length; i++)
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this.updatePreview(this.previews[i], this.tabList[i]);
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var showAllLabel = gNavigatorBundle.getString("ctrlTab.listAllTabs.label");
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this.showAllButton.label =
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PluralForm.get(this.tabCount, showAllLabel).replace("#1", this.tabCount);
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this.showAllButton.hidden = !allTabs.canOpen;
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},
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updatePreview: function ctrlTab_updatePreview(aPreview, aTab) {
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if (aPreview == this.showAllButton)
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return;
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aPreview._tab = aTab;
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if (aPreview.firstChild)
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aPreview.firstChild.remove();
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if (aTab) {
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let canvasWidth = this.canvasWidth;
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let canvasHeight = this.canvasHeight;
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aPreview.appendChild(tabPreviews.get(aTab));
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aPreview.setAttribute("label", aTab.label);
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aPreview.setAttribute("tooltiptext", aTab.label);
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aPreview.setAttribute("canvaswidth", canvasWidth);
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aPreview.setAttribute("canvasstyle",
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"max-width:" + canvasWidth + "px;" +
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"min-width:" + canvasWidth + "px;" +
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"max-height:" + canvasHeight + "px;" +
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"min-height:" + canvasHeight + "px;");
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if (aTab.image)
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aPreview.setAttribute("image", aTab.image);
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else
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aPreview.removeAttribute("image");
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aPreview.hidden = false;
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} else {
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aPreview.hidden = true;
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aPreview.removeAttribute("label");
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aPreview.removeAttribute("tooltiptext");
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aPreview.removeAttribute("image");
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}
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},
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advanceFocus: function ctrlTab_advanceFocus(aForward) {
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let selectedIndex = Array.indexOf(this.previews, this.selected);
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do {
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selectedIndex += aForward ? 1 : -1;
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if (selectedIndex < 0)
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selectedIndex = this.previews.length - 1;
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else if (selectedIndex >= this.previews.length)
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selectedIndex = 0;
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} while (this.previews[selectedIndex].hidden);
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if (this._selectedIndex == -1) {
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// Focus is already in the panel.
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this.previews[selectedIndex].focus();
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} else {
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this._selectedIndex = selectedIndex;
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}
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if (this._timer) {
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clearTimeout(this._timer);
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this._timer = null;
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this._openPanel();
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}
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},
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_mouseOverFocus: function ctrlTab_mouseOverFocus(aPreview) {
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if (this._trackMouseOver)
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aPreview.focus();
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},
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pick: function ctrlTab_pick(aPreview) {
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if (!this.tabCount)
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return;
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var select = (aPreview || this.selected);
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if (select == this.showAllButton)
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this.showAllTabs();
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else
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this.close(select._tab);
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},
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showAllTabs: function ctrlTab_showAllTabs(aPreview) {
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this.close();
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document.getElementById("Browser:ShowAllTabs").doCommand();
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},
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remove: function ctrlTab_remove(aPreview) {
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if (aPreview._tab)
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gBrowser.removeTab(aPreview._tab);
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},
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attachTab: function ctrlTab_attachTab(aTab, aPos) {
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if (aTab.closing)
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return;
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if (aPos == 0)
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this._recentlyUsedTabs.unshift(aTab);
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else if (aPos)
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this._recentlyUsedTabs.splice(aPos, 0, aTab);
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else
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this._recentlyUsedTabs.push(aTab);
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},
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detachTab: function ctrlTab_detachTab(aTab) {
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var i = this._recentlyUsedTabs.indexOf(aTab);
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if (i >= 0)
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this._recentlyUsedTabs.splice(i, 1);
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},
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open: function ctrlTab_open() {
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if (this.isOpen)
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return;
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document.addEventListener("keyup", this, true);
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this.updatePreviews();
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this._selectedIndex = 1;
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// Add a slight delay before showing the UI, so that a quick
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// "ctrl-tab" keypress just flips back to the MRU tab.
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this._timer = setTimeout(function(self) {
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self._timer = null;
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self._openPanel();
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}, 200, this);
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},
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_openPanel: function ctrlTab_openPanel() {
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tabPreviewPanelHelper.opening(this);
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this.panel.width = Math.min(screen.availWidth * .99,
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this.canvasWidth * 1.25 * this.tabPreviewCount);
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var estimateHeight = this.canvasHeight * 1.25 + 75;
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this.panel.openPopupAtScreen(screen.availLeft + (screen.availWidth - this.panel.width) / 2,
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screen.availTop + (screen.availHeight - estimateHeight) / 2,
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false);
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},
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close: function ctrlTab_close(aTabToSelect) {
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if (!this.isOpen)
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return;
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if (this._timer) {
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clearTimeout(this._timer);
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this._timer = null;
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this.suspendGUI();
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if (aTabToSelect)
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gBrowser.selectedTab = aTabToSelect;
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return;
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}
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this.tabToSelect = aTabToSelect;
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this.panel.hidePopup();
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},
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setupGUI: function ctrlTab_setupGUI() {
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this.selected.focus();
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this._selectedIndex = -1;
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// Track mouse movement after a brief delay so that the item that happens
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// to be under the mouse pointer initially won't be selected unintentionally.
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this._trackMouseOver = false;
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setTimeout(function(self) {
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if (self.isOpen)
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self._trackMouseOver = true;
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}, 0, this);
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},
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suspendGUI: function ctrlTab_suspendGUI() {
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document.removeEventListener("keyup", this, true);
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for (let preview of this.previews) {
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this.updatePreview(preview, null);
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}
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},
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onKeyPress: function ctrlTab_onKeyPress(event) {
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var isOpen = this.isOpen;
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if (isOpen) {
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event.preventDefault();
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event.stopPropagation();
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}
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switch (event.keyCode) {
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case event.DOM_VK_TAB:
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if (event.ctrlKey && !event.altKey && !event.metaKey) {
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if (isOpen) {
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this.advanceFocus(!event.shiftKey);
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} else if (!event.shiftKey) {
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event.preventDefault();
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event.stopPropagation();
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let tabs = gBrowser.visibleTabs;
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if (tabs.length > 2) {
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this.open();
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} else if (tabs.length == 2) {
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let index = tabs[0].selected ? 1 : 0;
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gBrowser.selectedTab = tabs[index];
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}
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}
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}
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break;
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default:
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if (isOpen && event.ctrlKey) {
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if (event.keyCode == event.DOM_VK_DELETE) {
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this.remove(this.selected);
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break;
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}
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switch (event.charCode) {
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case this.keys.close:
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this.remove(this.selected);
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break;
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case this.keys.find:
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case this.keys.selectAll:
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this.showAllTabs();
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break;
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}
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}
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}
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},
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removeClosingTabFromUI: function ctrlTab_removeClosingTabFromUI(aTab) {
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if (this.tabCount == 2) {
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this.close();
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return;
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}
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this.updatePreviews();
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if (this.selected.hidden)
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this.advanceFocus(false);
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if (this.selected == this.showAllButton)
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this.advanceFocus(false);
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// If the current tab is removed, another tab can steal our focus.
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if (aTab.selected && this.panel.state == "open") {
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setTimeout(function(selected) {
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selected.focus();
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}, 0, this.selected);
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}
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},
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handleEvent: function ctrlTab_handleEvent(event) {
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switch (event.type) {
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case "SSWindowRestored":
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this._initRecentlyUsedTabs();
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break;
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case "TabAttrModified":
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// tab attribute modified (i.e. label, busy, image)
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// update preview only if tab attribute modified in the list
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if (event.detail.changed.some(
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(elem, ind, arr) => ["label", "busy", "image"].includes(elem))) {
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for (let i = this.previews.length - 1; i >= 0; i--) {
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if (this.previews[i]._tab && this.previews[i]._tab == event.target) {
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this.updatePreview(this.previews[i], event.target);
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break;
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}
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}
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}
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break;
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case "TabSelect":
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this.detachTab(event.target);
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this.attachTab(event.target, 0);
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break;
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case "TabOpen":
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this.attachTab(event.target, 1);
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break;
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case "TabClose":
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this.detachTab(event.target);
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if (this.isOpen)
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this.removeClosingTabFromUI(event.target);
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break;
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case "keypress":
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this.onKeyPress(event);
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break;
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case "keyup":
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if (event.keyCode == event.DOM_VK_CONTROL)
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this.pick();
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break;
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case "popupshowing":
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if (event.target.id == "menu_viewPopup")
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document.getElementById("menu_showAllTabs").hidden = !allTabs.canOpen;
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break;
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}
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},
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filterForThumbnailExpiration(aCallback) {
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// Save a few more thumbnails than we actually display, so that when tabs
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// are closed, the previews we add instead still get thumbnails.
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const extraThumbnails = 3;
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const thumbnailCount = Math.min(this.tabPreviewCount + extraThumbnails,
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this.tabCount);
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let urls = [];
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for (let i = 0; i < thumbnailCount; i++)
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urls.push(this.tabList[i].linkedBrowser.currentURI.spec);
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aCallback(urls);
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},
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_initRecentlyUsedTabs() {
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this._recentlyUsedTabs =
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Array.filter(gBrowser.tabs, tab => !tab.closing)
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.sort((tab1, tab2) => tab2.lastAccessed - tab1.lastAccessed);
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},
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_init: function ctrlTab__init(enable) {
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var toggleEventListener = enable ? "addEventListener" : "removeEventListener";
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window[toggleEventListener]("SSWindowRestored", this);
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var tabContainer = gBrowser.tabContainer;
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tabContainer[toggleEventListener]("TabOpen", this);
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tabContainer[toggleEventListener]("TabAttrModified", this);
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tabContainer[toggleEventListener]("TabSelect", this);
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tabContainer[toggleEventListener]("TabClose", this);
|
|
|
|
document[toggleEventListener]("keypress", this);
|
|
gBrowser.mTabBox.handleCtrlTab = !enable;
|
|
|
|
if (enable)
|
|
PageThumbs.addExpirationFilter(this);
|
|
else
|
|
PageThumbs.removeExpirationFilter(this);
|
|
|
|
// If we're not running, hide the "Show All Tabs" menu item,
|
|
// as Shift+Ctrl+Tab will be handled by the tab bar.
|
|
document.getElementById("menu_showAllTabs").hidden = !enable;
|
|
document.getElementById("menu_viewPopup")[toggleEventListener]("popupshowing", this);
|
|
|
|
// Also disable the <key> to ensure Shift+Ctrl+Tab never triggers
|
|
// Show All Tabs.
|
|
var key_showAllTabs = document.getElementById("key_showAllTabs");
|
|
if (enable)
|
|
key_showAllTabs.removeAttribute("disabled");
|
|
else
|
|
key_showAllTabs.setAttribute("disabled", "true");
|
|
}
|
|
};
|
|
|
|
|
|
/**
|
|
* All Tabs menu
|
|
*/
|
|
var allTabs = {
|
|
get toolbarButton() {
|
|
return document.getElementById("alltabs-button");
|
|
},
|
|
|
|
get canOpen() {
|
|
return isElementVisible(this.toolbarButton);
|
|
},
|
|
|
|
open: function allTabs_open() {
|
|
if (this.canOpen) {
|
|
// Without setTimeout, the menupopup won't stay open when invoking
|
|
// "View > Show All Tabs" and the menu bar auto-hides.
|
|
setTimeout(() => {
|
|
this.toolbarButton.open = true;
|
|
}, 0);
|
|
}
|
|
}
|
|
};
|