Add m-esr52 at 52.6.0

1 files changed, 587 insertions, 0 deletions

diff --git a/browser/base/content/browser-ctrlTab.js b/browser/base/content/browser-ctrlTab.js
new file mode 100644
index 000000000..c761ea095
--- /dev/null
+++ b/browser/base/content/browser-ctrlTab.js
@@ -0,0 +1,587 @@
+/* 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/. */
+
+/**
+ * Tab previews utility, produces thumbnails
+ */
+var tabPreviews = {
+  init: function tabPreviews_init() {
+    if (this._selectedTab)
+      return;
+    this._selectedTab = gBrowser.selectedTab;
+
+    gBrowser.tabContainer.addEventListener("TabSelect", this, false);
+    gBrowser.tabContainer.addEventListener("SSTabRestored", this, false);
+
+    let screenManager = Cc["@mozilla.org/gfx/screenmanager;1"]
+                          .getService(Ci.nsIScreenManager);
+    let left = {}, top = {}, width = {}, height = {};
+    screenManager.primaryScreen.GetRectDisplayPix(left, top, width, height);
+    this.aspectRatio = height.value / width.value;
+  },
+
+  get: function tabPreviews_get(aTab) {
+    let uri = aTab.linkedBrowser.currentURI.spec;
+
+    if (aTab.__thumbnail_lastURI &&
+        aTab.__thumbnail_lastURI != uri) {
+      aTab.__thumbnail = null;
+      aTab.__thumbnail_lastURI = null;
+    }
+
+    if (aTab.__thumbnail)
+      return aTab.__thumbnail;
+
+    if (aTab.getAttribute("pending") == "true") {
+      let img = new Image;
+      img.src = PageThumbs.getThumbnailURL(uri);
+      return img;
+    }
+
+    return this.capture(aTab, !aTab.hasAttribute("busy"));
+  },
+
+  capture: function tabPreviews_capture(aTab, aShouldCache) {
+    let browser = aTab.linkedBrowser;
+    let uri = browser.currentURI.spec;
+    let canvas = PageThumbs.createCanvas(window);
+    PageThumbs.shouldStoreThumbnail(browser, (aDoStore) => {
+      if (aDoStore && aShouldCache) {
+        PageThumbs.captureAndStore(browser, function () {
+          let img = new Image;
+          img.src = PageThumbs.getThumbnailURL(uri);
+          aTab.__thumbnail = img;
+          aTab.__thumbnail_lastURI = uri;
+          canvas.getContext("2d").drawImage(img, 0, 0);
+        });
+      } else {
+        PageThumbs.captureToCanvas(browser, canvas, () => {
+          if (aShouldCache) {
+            aTab.__thumbnail = canvas;
+            aTab.__thumbnail_lastURI = uri;
+          }
+        });
+      }
+    });
+    return canvas;
+  },
+
+  handleEvent: function tabPreviews_handleEvent(event) {
+    switch (event.type) {
+      case "TabSelect":
+        if (this._selectedTab &&
+            this._selectedTab.parentNode &&
+            !this._pendingUpdate) {
+          // Generate a thumbnail for the tab that was selected.
+          // The timeout keeps the UI snappy and prevents us from generating thumbnails
+          // for tabs that will be closed. During that timeout, don't generate other
+          // thumbnails in case multiple TabSelect events occur fast in succession.
+          this._pendingUpdate = true;
+          setTimeout(function (self, aTab) {
+            self._pendingUpdate = false;
+            if (aTab.parentNode &&
+                !aTab.hasAttribute("busy") &&
+                !aTab.hasAttribute("pending"))
+              self.capture(aTab, true);
+          }, 2000, this, this._selectedTab);
+        }
+        this._selectedTab = event.target;
+        break;
+      case "SSTabRestored":
+        this.capture(event.target, true);
+        break;
+    }
+  }
+};
+
+var tabPreviewPanelHelper = {
+  opening: function (host) {
+    host.panel.hidden = false;
+
+    var handler = this._generateHandler(host);
+    host.panel.addEventListener("popupshown", handler, false);
+    host.panel.addEventListener("popuphiding", handler, false);
+
+    host._prevFocus = document.commandDispatcher.focusedElement;
+  },
+  _generateHandler: function (host) {
+    var self = this;
+    return function (event) {
+      if (event.target == host.panel) {
+        host.panel.removeEventListener(event.type, arguments.callee, false);
+        self["_" + event.type](host);
+      }
+    };
+  },
+  _popupshown: function (host) {
+    if ("setupGUI" in host)
+      host.setupGUI();
+  },
+  _popuphiding: function (host) {
+    if ("suspendGUI" in host)
+      host.suspendGUI();
+
+    if (host._prevFocus) {
+      Services.focus.setFocus(host._prevFocus, Ci.nsIFocusManager.FLAG_NOSCROLL);
+      host._prevFocus = null;
+    } else
+      gBrowser.selectedBrowser.focus();
+
+    if (host.tabToSelect) {
+      gBrowser.selectedTab = host.tabToSelect;
+      host.tabToSelect = null;
+    }
+  }
+};
+
+/**
+ * Ctrl-Tab panel
+ */
+var ctrlTab = {
+  get panel () {
+    delete this.panel;
+    return this.panel = document.getElementById("ctrlTab-panel");
+  },
+  get showAllButton () {
+    delete this.showAllButton;
+    return this.showAllButton = document.getElementById("ctrlTab-showAll");
+  },
+  get previews () {
+    delete this.previews;
+    return this.previews = this.panel.getElementsByClassName("ctrlTab-preview");
+  },
+  get maxTabPreviews () {
+    delete this.maxTabPreviews;
+    return this.maxTabPreviews = this.previews.length - 1;
+  },
+  get canvasWidth () {
+    delete this.canvasWidth;
+    return this.canvasWidth = Math.ceil(screen.availWidth * .85 / this.maxTabPreviews);
+  },
+  get canvasHeight () {
+    delete this.canvasHeight;
+    return this.canvasHeight = Math.round(this.canvasWidth * tabPreviews.aspectRatio);
+  },
+  get keys () {
+    var keys = {};
+    ["close", "find", "selectAll"].forEach(function (key) {
+      keys[key] = document.getElementById("key_" + key)
+                          .getAttribute("key")
+                          .toLocaleLowerCase().charCodeAt(0);
+    });
+    delete this.keys;
+    return this.keys = keys;
+  },
+  _selectedIndex: 0,
+  get selected () {
+    return this._selectedIndex < 0 ?
+             document.activeElement :
+             this.previews.item(this._selectedIndex);
+  },
+  get isOpen () {
+    return this.panel.state == "open" || this.panel.state == "showing" || this._timer;
+  },
+  get tabCount () {
+    return this.tabList.length;
+  },
+  get tabPreviewCount () {
+    return Math.min(this.maxTabPreviews, this.tabCount);
+  },
+
+  get tabList () {
+    return this._recentlyUsedTabs;
+  },
+
+  init: function ctrlTab_init() {
+    if (!this._recentlyUsedTabs) {
+      tabPreviews.init();
+
+      this._initRecentlyUsedTabs();
+      this._init(true);
+    }
+  },
+
+  uninit: function ctrlTab_uninit() {
+    this._recentlyUsedTabs = null;
+    this._init(false);
+  },
+
+  prefName: "browser.ctrlTab.previews",
+  readPref: function ctrlTab_readPref() {
+    var enable =
+      gPrefService.getBoolPref(this.prefName) &&
+      (!gPrefService.prefHasUserValue("browser.ctrlTab.disallowForScreenReaders") ||
+       !gPrefService.getBoolPref("browser.ctrlTab.disallowForScreenReaders"));
+
+    if (enable)
+      this.init();
+    else
+      this.uninit();
+  },
+  observe: function (aSubject, aTopic, aPrefName) {
+    this.readPref();
+  },
+
+  updatePreviews: function ctrlTab_updatePreviews() {
+    for (let i = 0; i < this.previews.length; i++)
+      this.updatePreview(this.previews[i], this.tabList[i]);
+
+    var showAllLabel = gNavigatorBundle.getString("ctrlTab.listAllTabs.label");
+    this.showAllButton.label =
+      PluralForm.get(this.tabCount, showAllLabel).replace("#1", this.tabCount);
+    this.showAllButton.hidden = !allTabs.canOpen;
+  },
+
+  updatePreview: function ctrlTab_updatePreview(aPreview, aTab) {
+    if (aPreview == this.showAllButton)
+      return;
+
+    aPreview._tab = aTab;
+
+    if (aPreview.firstChild)
+      aPreview.removeChild(aPreview.firstChild);
+    if (aTab) {
+      let canvasWidth = this.canvasWidth;
+      let canvasHeight = this.canvasHeight;
+      aPreview.appendChild(tabPreviews.get(aTab));
+      aPreview.setAttribute("label", aTab.label);
+      aPreview.setAttribute("tooltiptext", aTab.label);
+      aPreview.setAttribute("crop", aTab.crop);
+      aPreview.setAttribute("canvaswidth", canvasWidth);
+      aPreview.setAttribute("canvasstyle",
+                            "max-width:" + canvasWidth + "px;" +
+                            "min-width:" + canvasWidth + "px;" +
+                            "max-height:" + canvasHeight + "px;" +
+                            "min-height:" + canvasHeight + "px;");
+      if (aTab.image)
+        aPreview.setAttribute("image", aTab.image);
+      else
+        aPreview.removeAttribute("image");
+      aPreview.hidden = false;
+    } else {
+      aPreview.hidden = true;
+      aPreview.removeAttribute("label");
+      aPreview.removeAttribute("tooltiptext");
+      aPreview.removeAttribute("image");
+    }
+  },
+
+  advanceFocus: function ctrlTab_advanceFocus(aForward) {
+    let selectedIndex = Array.indexOf(this.previews, this.selected);
+    do {
+      selectedIndex += aForward ? 1 : -1;
+      if (selectedIndex < 0)
+        selectedIndex = this.previews.length - 1;
+      else if (selectedIndex >= this.previews.length)
+        selectedIndex = 0;
+    } while (this.previews[selectedIndex].hidden);
+
+    if (this._selectedIndex == -1) {
+      // Focus is already in the panel.
+      this.previews[selectedIndex].focus();
+    } else {
+      this._selectedIndex = selectedIndex;
+    }
+
+    if (this._timer) {
+      clearTimeout(this._timer);
+      this._timer = null;
+      this._openPanel();
+    }
+  },
+
+  _mouseOverFocus: function ctrlTab_mouseOverFocus(aPreview) {
+    if (this._trackMouseOver)
+      aPreview.focus();
+  },
+
+  pick: function ctrlTab_pick(aPreview) {
+    if (!this.tabCount)
+      return;
+
+    var select = (aPreview || this.selected);
+
+    if (select == this.showAllButton)
+      this.showAllTabs();
+    else
+      this.close(select._tab);
+  },
+
+  showAllTabs: function ctrlTab_showAllTabs(aPreview) {
+    this.close();
+    document.getElementById("Browser:ShowAllTabs").doCommand();
+  },
+
+  remove: function ctrlTab_remove(aPreview) {
+    if (aPreview._tab)
+      gBrowser.removeTab(aPreview._tab);
+  },
+
+  attachTab: function ctrlTab_attachTab(aTab, aPos) {
+    if (aTab.closing)
+      return;
+
+    if (aPos == 0)
+      this._recentlyUsedTabs.unshift(aTab);
+    else if (aPos)
+      this._recentlyUsedTabs.splice(aPos, 0, aTab);
+    else
+      this._recentlyUsedTabs.push(aTab);
+  },
+
+  detachTab: function ctrlTab_detachTab(aTab) {
+    var i = this._recentlyUsedTabs.indexOf(aTab);
+    if (i >= 0)
+      this._recentlyUsedTabs.splice(i, 1);
+  },
+
+  open: function ctrlTab_open() {
+    if (this.isOpen)
+      return;
+
+    document.addEventListener("keyup", this, true);
+
+    this.updatePreviews();
+    this._selectedIndex = 1;
+
+    // Add a slight delay before showing the UI, so that a quick
+    // "ctrl-tab" keypress just flips back to the MRU tab.
+    this._timer = setTimeout(function (self) {
+      self._timer = null;
+      self._openPanel();
+    }, 200, this);
+  },
+
+  _openPanel: function ctrlTab_openPanel() {
+    tabPreviewPanelHelper.opening(this);
+
+    this.panel.width = Math.min(screen.availWidth * .99,
+                                this.canvasWidth * 1.25 * this.tabPreviewCount);
+    var estimateHeight = this.canvasHeight * 1.25 + 75;
+    this.panel.openPopupAtScreen(screen.availLeft + (screen.availWidth - this.panel.width) / 2,
+                                 screen.availTop + (screen.availHeight - estimateHeight) / 2,
+                                 false);
+  },
+
+  close: function ctrlTab_close(aTabToSelect) {
+    if (!this.isOpen)
+      return;
+
+    if (this._timer) {
+      clearTimeout(this._timer);
+      this._timer = null;
+      this.suspendGUI();
+      if (aTabToSelect)
+        gBrowser.selectedTab = aTabToSelect;
+      return;
+    }
+
+    this.tabToSelect = aTabToSelect;
+    this.panel.hidePopup();
+  },
+
+  setupGUI: function ctrlTab_setupGUI() {
+    this.selected.focus();
+    this._selectedIndex = -1;
+
+    // Track mouse movement after a brief delay so that the item that happens
+    // to be under the mouse pointer initially won't be selected unintentionally.
+    this._trackMouseOver = false;
+    setTimeout(function (self) {
+      if (self.isOpen)
+        self._trackMouseOver = true;
+    }, 0, this);
+  },
+
+  suspendGUI: function ctrlTab_suspendGUI() {
+    document.removeEventListener("keyup", this, true);
+
+    for (let preview of this.previews) {
+      this.updatePreview(preview, null);
+    }
+  },
+
+  onKeyPress: function ctrlTab_onKeyPress(event) {
+    var isOpen = this.isOpen;
+
+    if (isOpen) {
+      event.preventDefault();
+      event.stopPropagation();
+    }
+
+    switch (event.keyCode) {
+      case event.DOM_VK_TAB:
+        if (event.ctrlKey && !event.altKey && !event.metaKey) {
+          if (isOpen) {
+            this.advanceFocus(!event.shiftKey);
+          } else if (!event.shiftKey) {
+            event.preventDefault();
+            event.stopPropagation();
+            let tabs = gBrowser.visibleTabs;
+            if (tabs.length > 2) {
+              this.open();
+            } else if (tabs.length == 2) {
+              let index = tabs[0].selected ? 1 : 0;
+              gBrowser.selectedTab = tabs[index];
+            }
+          }
+        }
+        break;
+      default:
+        if (isOpen && event.ctrlKey) {
+          if (event.keyCode == event.DOM_VK_DELETE) {
+            this.remove(this.selected);
+            break;
+          }
+          switch (event.charCode) {
+            case this.keys.close:
+              this.remove(this.selected);
+              break;
+            case this.keys.find:
+            case this.keys.selectAll:
+              this.showAllTabs();
+              break;
+          }
+        }
+    }
+  },
+
+  removeClosingTabFromUI: function ctrlTab_removeClosingTabFromUI(aTab) {
+    if (this.tabCount == 2) {
+      this.close();
+      return;
+    }
+
+    this.updatePreviews();
+
+    if (this.selected.hidden)
+      this.advanceFocus(false);
+    if (this.selected == this.showAllButton)
+      this.advanceFocus(false);
+
+    // If the current tab is removed, another tab can steal our focus.
+    if (aTab.selected && this.panel.state == "open") {
+      setTimeout(function (selected) {
+        selected.focus();
+      }, 0, this.selected);
+    }
+  },
+
+  handleEvent: function ctrlTab_handleEvent(event) {
+    switch (event.type) {
+      case "SSWindowRestored":
+        this._initRecentlyUsedTabs();
+        break;
+      case "TabAttrModified":
+        // tab attribute modified (e.g. label, crop, busy, image, selected)
+        for (let i = this.previews.length - 1; i >= 0; i--) {
+          if (this.previews[i]._tab && this.previews[i]._tab == event.target) {
+            this.updatePreview(this.previews[i], event.target);
+            break;
+          }
+        }
+        break;
+      case "TabSelect":
+        this.detachTab(event.target);
+        this.attachTab(event.target, 0);
+        break;
+      case "TabOpen":
+        this.attachTab(event.target, 1);
+        break;
+      case "TabClose":
+        this.detachTab(event.target);
+        if (this.isOpen)
+          this.removeClosingTabFromUI(event.target);
+        break;
+      case "keypress":
+        this.onKeyPress(event);
+        break;
+      case "keyup":
+        if (event.keyCode == event.DOM_VK_CONTROL)
+          this.pick();
+        break;
+      case "popupshowing":
+        if (event.target.id == "menu_viewPopup")
+          document.getElementById("menu_showAllTabs").hidden = !allTabs.canOpen;
+        break;
+    }
+  },
+
+  filterForThumbnailExpiration: function (aCallback) {
+    // Save a few more thumbnails than we actually display, so that when tabs
+    // are closed, the previews we add instead still get thumbnails.
+    const extraThumbnails = 3;
+    const thumbnailCount = Math.min(this.tabPreviewCount + extraThumbnails,
+                                    this.tabCount);
+
+    let urls = [];
+    for (let i = 0; i < thumbnailCount; i++)
+      urls.push(this.tabList[i].linkedBrowser.currentURI.spec);
+
+    aCallback(urls);
+  },
+
+  _initRecentlyUsedTabs: function () {
+    this._recentlyUsedTabs =
+      Array.filter(gBrowser.tabs, tab => !tab.closing)
+           .sort((tab1, tab2) => tab2.lastAccessed - tab1.lastAccessed);
+  },
+
+  _init: function ctrlTab__init(enable) {
+    var toggleEventListener = enable ? "addEventListener" : "removeEventListener";
+
+    window[toggleEventListener]("SSWindowRestored", this, false);
+
+    var tabContainer = gBrowser.tabContainer;
+    tabContainer[toggleEventListener]("TabOpen", this, false);
+    tabContainer[toggleEventListener]("TabAttrModified", this, false);
+    tabContainer[toggleEventListener]("TabSelect", this, false);
+    tabContainer[toggleEventListener]("TabClose", this, false);
+
+    document[toggleEventListener]("keypress", this, false);
+    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);
+    }
+  }
+};