Adding upstream version 115.7.0esr.upstream/115.7.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1100 insertions, 0 deletions

diff --git a/browser/components/preferences/search.js b/browser/components/preferences/search.js
new file mode 100644
index 0000000000..52f49b77bb
--- /dev/null
+++ b/browser/components/preferences/search.js
@@ -0,0 +1,1100 @@
+/* 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/. */
+
+/* import-globals-from extensionControlled.js */
+/* import-globals-from preferences.js */
+
+const lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  SearchUIUtils: "resource:///modules/SearchUIUtils.sys.mjs",
+});
+
+Preferences.addAll([
+  { id: "browser.search.suggest.enabled", type: "bool" },
+  { id: "browser.urlbar.suggest.searches", type: "bool" },
+  { id: "browser.search.suggest.enabled.private", type: "bool" },
+  { id: "browser.search.hiddenOneOffs", type: "unichar" },
+  { id: "browser.search.widget.inNavBar", type: "bool" },
+  { id: "browser.urlbar.showSearchSuggestionsFirst", type: "bool" },
+  { id: "browser.urlbar.showSearchTerms.enabled", type: "bool" },
+  { id: "browser.search.separatePrivateDefault", type: "bool" },
+  { id: "browser.search.separatePrivateDefault.ui.enabled", type: "bool" },
+]);
+
+const ENGINE_FLAVOR = "text/x-moz-search-engine";
+const SEARCH_TYPE = "default_search";
+const SEARCH_KEY = "defaultSearch";
+
+var gEngineView = null;
+
+var gSearchPane = {
+  init() {
+    gEngineView = new EngineView(new EngineStore());
+    document.getElementById("engineList").view = gEngineView;
+    this.buildDefaultEngineDropDowns().catch(console.error);
+
+    if (
+      Services.policies &&
+      !Services.policies.isAllowed("installSearchEngine")
+    ) {
+      document.getElementById("addEnginesBox").hidden = true;
+    } else {
+      let addEnginesLink = document.getElementById("addEngines");
+      addEnginesLink.setAttribute("href", lazy.SearchUIUtils.searchEnginesURL);
+    }
+
+    window.addEventListener("click", this);
+    window.addEventListener("command", this);
+    window.addEventListener("dragstart", this);
+    window.addEventListener("keypress", this);
+    window.addEventListener("select", this);
+    window.addEventListener("dblclick", this);
+
+    Services.obs.addObserver(this, "browser-search-engine-modified");
+    Services.obs.addObserver(this, "intl:app-locales-changed");
+    window.addEventListener("unload", () => {
+      Services.obs.removeObserver(this, "browser-search-engine-modified");
+      Services.obs.removeObserver(this, "intl:app-locales-changed");
+    });
+
+    let suggestsPref = Preferences.get("browser.search.suggest.enabled");
+    let urlbarSuggestsPref = Preferences.get("browser.urlbar.suggest.searches");
+    let privateSuggestsPref = Preferences.get(
+      "browser.search.suggest.enabled.private"
+    );
+    let updateSuggestionCheckboxes =
+      this._updateSuggestionCheckboxes.bind(this);
+    suggestsPref.on("change", updateSuggestionCheckboxes);
+    urlbarSuggestsPref.on("change", updateSuggestionCheckboxes);
+    let urlbarSuggests = document.getElementById("urlBarSuggestion");
+    urlbarSuggests.addEventListener("command", () => {
+      urlbarSuggestsPref.value = urlbarSuggests.checked;
+    });
+    let privateWindowCheckbox = document.getElementById(
+      "showSearchSuggestionsPrivateWindows"
+    );
+    privateWindowCheckbox.addEventListener("command", () => {
+      privateSuggestsPref.value = privateWindowCheckbox.checked;
+    });
+
+    setEventListener(
+      "browserSeparateDefaultEngine",
+      "command",
+      this._onBrowserSeparateDefaultEngineChange.bind(this)
+    );
+    setEventListener(
+      "openLocationBarPrivacyPreferences",
+      "click",
+      function (event) {
+        if (event.button == 0) {
+          gotoPref("privacy-locationBar");
+        }
+      }
+    );
+
+    this._initDefaultEngines();
+    this._initShowSearchTermsCheckbox();
+    this._updateSuggestionCheckboxes();
+    this._showAddEngineButton();
+  },
+
+  /**
+   * Initialize the default engine handling. This will hide the private default
+   * options if they are not enabled yet.
+   */
+  _initDefaultEngines() {
+    this._separatePrivateDefaultEnabledPref = Preferences.get(
+      "browser.search.separatePrivateDefault.ui.enabled"
+    );
+
+    this._separatePrivateDefaultPref = Preferences.get(
+      "browser.search.separatePrivateDefault"
+    );
+
+    const checkbox = document.getElementById("browserSeparateDefaultEngine");
+    checkbox.checked = !this._separatePrivateDefaultPref.value;
+
+    this._updatePrivateEngineDisplayBoxes();
+
+    const listener = () => {
+      this._updatePrivateEngineDisplayBoxes();
+      this.buildDefaultEngineDropDowns().catch(console.error);
+    };
+
+    this._separatePrivateDefaultEnabledPref.on("change", listener);
+    this._separatePrivateDefaultPref.on("change", listener);
+  },
+
+  _initShowSearchTermsCheckbox() {
+    let checkbox = document.getElementById("searchShowSearchTermCheckbox");
+
+    // Add Nimbus event to show/hide checkbox.
+    let onNimbus = () => {
+      checkbox.hidden = !UrlbarPrefs.get("showSearchTermsFeatureGate");
+    };
+    NimbusFeatures.urlbar.onUpdate(onNimbus);
+
+    // Add observer of Search Bar preference as showSearchTerms
+    // can't be enabled/disabled while Search Bar is enabled.
+    let searchBarPref = Preferences.get("browser.search.widget.inNavBar");
+    let updateCheckboxEnabled = () => {
+      checkbox.disabled = searchBarPref.value;
+    };
+    searchBarPref.on("change", updateCheckboxEnabled);
+
+    // Fire once to initialize.
+    onNimbus();
+    updateCheckboxEnabled();
+
+    window.addEventListener("unload", () => {
+      NimbusFeatures.urlbar.offUpdate(onNimbus);
+    });
+  },
+
+  _updatePrivateEngineDisplayBoxes() {
+    const separateEnabled = this._separatePrivateDefaultEnabledPref.value;
+    document.getElementById("browserSeparateDefaultEngine").hidden =
+      !separateEnabled;
+
+    const separateDefault = this._separatePrivateDefaultPref.value;
+
+    const vbox = document.getElementById("browserPrivateEngineSelection");
+    vbox.hidden = !separateEnabled || !separateDefault;
+  },
+
+  _onBrowserSeparateDefaultEngineChange(event) {
+    this._separatePrivateDefaultPref.value = !event.target.checked;
+  },
+
+  _updateSuggestionCheckboxes() {
+    let suggestsPref = Preferences.get("browser.search.suggest.enabled");
+    let permanentPB = Services.prefs.getBoolPref(
+      "browser.privatebrowsing.autostart"
+    );
+    let urlbarSuggests = document.getElementById("urlBarSuggestion");
+    let positionCheckbox = document.getElementById(
+      "showSearchSuggestionsFirstCheckbox"
+    );
+    let privateWindowCheckbox = document.getElementById(
+      "showSearchSuggestionsPrivateWindows"
+    );
+
+    urlbarSuggests.disabled = !suggestsPref.value || permanentPB;
+    privateWindowCheckbox.disabled = !suggestsPref.value;
+    privateWindowCheckbox.checked = Preferences.get(
+      "browser.search.suggest.enabled.private"
+    ).value;
+    if (privateWindowCheckbox.disabled) {
+      privateWindowCheckbox.checked = false;
+    }
+
+    let urlbarSuggestsPref = Preferences.get("browser.urlbar.suggest.searches");
+    urlbarSuggests.checked = urlbarSuggestsPref.value;
+    if (urlbarSuggests.disabled) {
+      urlbarSuggests.checked = false;
+    }
+
+    if (urlbarSuggests.checked) {
+      positionCheckbox.disabled = false;
+      // Update the checked state of the show-suggestions-first checkbox.  Note
+      // that this does *not* also update its pref, it only checks the box.
+      positionCheckbox.checked = Preferences.get(
+        positionCheckbox.getAttribute("preference")
+      ).value;
+    } else {
+      positionCheckbox.disabled = true;
+      positionCheckbox.checked = false;
+    }
+
+    let permanentPBLabel = document.getElementById(
+      "urlBarSuggestionPermanentPBLabel"
+    );
+    permanentPBLabel.hidden = urlbarSuggests.hidden || !permanentPB;
+  },
+
+  _showAddEngineButton() {
+    let aliasRefresh = Services.prefs.getBoolPref(
+      "browser.urlbar.update2.engineAliasRefresh",
+      false
+    );
+    if (aliasRefresh) {
+      let addButton = document.getElementById("addEngineButton");
+      addButton.hidden = false;
+    }
+  },
+
+  /**
+   * Builds the default and private engines drop down lists. This is called
+   * each time something affects the list of engines.
+   */
+  async buildDefaultEngineDropDowns() {
+    await this._buildEngineDropDown(
+      document.getElementById("defaultEngine"),
+      (
+        await Services.search.getDefault()
+      ).name,
+      false
+    );
+
+    if (this._separatePrivateDefaultEnabledPref.value) {
+      await this._buildEngineDropDown(
+        document.getElementById("defaultPrivateEngine"),
+        (
+          await Services.search.getDefaultPrivate()
+        ).name,
+        true
+      );
+    }
+  },
+
+  /**
+   * Builds a drop down menu of search engines.
+   *
+   * @param {DOMMenuList} list
+   *   The menu list element to attach the list of engines.
+   * @param {string} currentEngine
+   *   The name of the current default engine.
+   * @param {boolean} isPrivate
+   *   True if we are dealing with the default engine for private mode.
+   */
+  async _buildEngineDropDown(list, currentEngine, isPrivate) {
+    // If the current engine isn't in the list any more, select the first item.
+    let engines = gEngineView._engineStore._engines;
+    if (!engines.length) {
+      return;
+    }
+    if (!engines.some(e => e.name == currentEngine)) {
+      currentEngine = engines[0].name;
+    }
+
+    // Now clean-up and rebuild the list.
+    list.removeAllItems();
+    gEngineView._engineStore._engines.forEach(e => {
+      let item = list.appendItem(e.name);
+      item.setAttribute(
+        "class",
+        "menuitem-iconic searchengine-menuitem menuitem-with-favicon"
+      );
+      if (e.iconURI) {
+        item.setAttribute("image", e.iconURI.spec);
+      }
+      item.engine = e;
+      if (e.name == currentEngine) {
+        list.selectedItem = item;
+      }
+    });
+  },
+
+  handleEvent(aEvent) {
+    switch (aEvent.type) {
+      case "dblclick":
+        if (aEvent.target.id == "engineChildren") {
+          let cell = aEvent.target.parentNode.getCellAt(
+            aEvent.clientX,
+            aEvent.clientY
+          );
+          if (cell.col?.id == "engineKeyword") {
+            this.startEditingAlias(gEngineView.selectedIndex);
+          }
+        }
+        break;
+      case "click":
+        if (
+          aEvent.target.id != "engineChildren" &&
+          !aEvent.target.classList.contains("searchEngineAction")
+        ) {
+          let engineList = document.getElementById("engineList");
+          // We don't want to toggle off selection while editing keyword
+          // so proceed only when the input field is hidden.
+          // We need to check that engineList.view is defined here
+          // because the "click" event listener is on <window> and the
+          // view might have been destroyed if the pane has been navigated
+          // away from.
+          if (engineList.inputField.hidden && engineList.view) {
+            let selection = engineList.view.selection;
+            if (selection?.count > 0) {
+              selection.toggleSelect(selection.currentIndex);
+            }
+            engineList.blur();
+          }
+        }
+        break;
+      case "command":
+        switch (aEvent.target.id) {
+          case "":
+            if (
+              aEvent.target.parentNode &&
+              aEvent.target.parentNode.parentNode
+            ) {
+              if (aEvent.target.parentNode.parentNode.id == "defaultEngine") {
+                gSearchPane.setDefaultEngine();
+              } else if (
+                aEvent.target.parentNode.parentNode.id == "defaultPrivateEngine"
+              ) {
+                gSearchPane.setDefaultPrivateEngine();
+              }
+            }
+            break;
+          case "restoreDefaultSearchEngines":
+            gSearchPane.onRestoreDefaults();
+            break;
+          case "removeEngineButton":
+            Services.search.removeEngine(
+              gEngineView.selectedEngine.originalEngine
+            );
+            break;
+          case "addEngineButton":
+            gSubDialog.open(
+              "chrome://browser/content/preferences/dialogs/addEngine.xhtml",
+              { features: "resizable=no, modal=yes" }
+            );
+            break;
+        }
+        break;
+      case "dragstart":
+        if (aEvent.target.id == "engineChildren") {
+          onDragEngineStart(aEvent);
+        }
+        break;
+      case "keypress":
+        if (aEvent.target.id == "engineList") {
+          gSearchPane.onTreeKeyPress(aEvent);
+        }
+        break;
+      case "select":
+        if (aEvent.target.id == "engineList") {
+          gSearchPane.onTreeSelect();
+        }
+        break;
+    }
+  },
+
+  /**
+   * Handle when the app locale is changed.
+   */
+  async appLocalesChanged() {
+    await document.l10n.ready;
+    await gEngineView.loadL10nNames();
+  },
+
+  /**
+   * Update the default engine UI and engine tree view as appropriate when engine changes
+   * or locale changes occur.
+   *
+   * @param {Object} engine
+   * @param {string} data
+   */
+  browserSearchEngineModified(engine, data) {
+    engine.QueryInterface(Ci.nsISearchEngine);
+    switch (data) {
+      case "engine-added":
+        gEngineView._engineStore.addEngine(engine);
+        gEngineView.rowCountChanged(gEngineView.lastEngineIndex, 1);
+        gSearchPane.buildDefaultEngineDropDowns();
+        break;
+      case "engine-changed":
+        gSearchPane.buildDefaultEngineDropDowns();
+        gEngineView._engineStore.updateEngine(engine);
+        gEngineView.invalidate();
+        break;
+      case "engine-removed":
+        gSearchPane.remove(engine);
+        break;
+      case "engine-default": {
+        // If the user is going through the drop down using up/down keys, the
+        // dropdown may still be open (eg. on Windows) when engine-default is
+        // fired, so rebuilding the list unconditionally would get in the way.
+        let selectedEngine =
+          document.getElementById("defaultEngine").selectedItem.engine;
+        if (selectedEngine.name != engine.name) {
+          gSearchPane.buildDefaultEngineDropDowns();
+        }
+        break;
+      }
+      case "engine-default-private": {
+        if (
+          this._separatePrivateDefaultEnabledPref.value &&
+          this._separatePrivateDefaultPref.value
+        ) {
+          // If the user is going through the drop down using up/down keys, the
+          // dropdown may still be open (eg. on Windows) when engine-default is
+          // fired, so rebuilding the list unconditionally would get in the way.
+          const selectedEngine = document.getElementById("defaultPrivateEngine")
+            .selectedItem.engine;
+          if (selectedEngine.name != engine.name) {
+            gSearchPane.buildDefaultEngineDropDowns();
+          }
+        }
+        break;
+      }
+    }
+  },
+
+  /**
+   * nsIObserver implementation.
+   */
+  observe(subject, topic, data) {
+    switch (topic) {
+      case "intl:app-locales-changed": {
+        this.appLocalesChanged();
+        break;
+      }
+      case "browser-search-engine-modified": {
+        this.browserSearchEngineModified(subject, data);
+        break;
+      }
+    }
+  },
+
+  onTreeSelect() {
+    document.getElementById("removeEngineButton").disabled =
+      !gEngineView.isEngineSelectedAndRemovable();
+  },
+
+  onTreeKeyPress(aEvent) {
+    let index = gEngineView.selectedIndex;
+    let tree = document.getElementById("engineList");
+    if (tree.hasAttribute("editing")) {
+      return;
+    }
+
+    if (aEvent.charCode == KeyEvent.DOM_VK_SPACE) {
+      // Space toggles the checkbox.
+      let newValue = !gEngineView.getCellValue(
+        index,
+        tree.columns.getNamedColumn("engineShown")
+      );
+      gEngineView.setCellValue(
+        index,
+        tree.columns.getFirstColumn(),
+        newValue.toString()
+      );
+      // Prevent page from scrolling on the space key.
+      aEvent.preventDefault();
+    } else {
+      let isMac = Services.appinfo.OS == "Darwin";
+      if (
+        (isMac && aEvent.keyCode == KeyEvent.DOM_VK_RETURN) ||
+        (!isMac && aEvent.keyCode == KeyEvent.DOM_VK_F2)
+      ) {
+        this.startEditingAlias(index);
+      } else if (
+        aEvent.keyCode == KeyEvent.DOM_VK_DELETE ||
+        (isMac &&
+          aEvent.shiftKey &&
+          aEvent.keyCode == KeyEvent.DOM_VK_BACK_SPACE &&
+          gEngineView.isEngineSelectedAndRemovable())
+      ) {
+        // Delete and Shift+Backspace (Mac) removes selected engine.
+        Services.search.removeEngine(gEngineView.selectedEngine.originalEngine);
+      }
+    }
+  },
+
+  startEditingAlias(index) {
+    // Local shortcut aliases can't be edited.
+    if (gEngineView._getLocalShortcut(index)) {
+      return;
+    }
+
+    let tree = document.getElementById("engineList");
+    let engine = gEngineView._engineStore.engines[index];
+    tree.startEditing(index, tree.columns.getLastColumn());
+    tree.inputField.value = engine.alias || "";
+    tree.inputField.select();
+  },
+
+  async onRestoreDefaults() {
+    let num = await gEngineView._engineStore.restoreDefaultEngines();
+    gEngineView.rowCountChanged(0, num);
+    gEngineView.invalidate();
+  },
+
+  showRestoreDefaults(aEnable) {
+    document.getElementById("restoreDefaultSearchEngines").disabled = !aEnable;
+  },
+
+  remove(aEngine) {
+    let index = gEngineView._engineStore.removeEngine(aEngine);
+    if (!gEngineView.tree) {
+      // Only update the selection if it's visible in the UI.
+      return;
+    }
+
+    gEngineView.rowCountChanged(index, -1);
+    gEngineView.invalidate();
+
+    gEngineView.selection.select(Math.min(index, gEngineView.rowCount - 1));
+    gEngineView.ensureRowIsVisible(gEngineView.currentIndex);
+
+    document.getElementById("engineList").focus();
+  },
+
+  async editKeyword(aEngine, aNewKeyword) {
+    let keyword = aNewKeyword.trim();
+    if (keyword) {
+      let eduplicate = false;
+      let dupName = "";
+
+      // Check for duplicates in Places keywords.
+      let bduplicate = !!(await PlacesUtils.keywords.fetch(keyword));
+
+      // Check for duplicates in changes we haven't committed yet
+      let engines = gEngineView._engineStore.engines;
+      let lc_keyword = keyword.toLocaleLowerCase();
+      for (let engine of engines) {
+        if (
+          engine.alias &&
+          engine.alias.toLocaleLowerCase() == lc_keyword &&
+          engine.name != aEngine.name
+        ) {
+          eduplicate = true;
+          dupName = engine.name;
+          break;
+        }
+      }
+
+      // Notify the user if they have chosen an existing engine/bookmark keyword
+      if (eduplicate || bduplicate) {
+        let msgids = [{ id: "search-keyword-warning-title" }];
+        if (eduplicate) {
+          msgids.push({
+            id: "search-keyword-warning-engine",
+            args: { name: dupName },
+          });
+        } else {
+          msgids.push({ id: "search-keyword-warning-bookmark" });
+        }
+
+        let [dtitle, msg] = await document.l10n.formatValues(msgids);
+
+        Services.prompt.alert(window, dtitle, msg);
+        return false;
+      }
+    }
+
+    gEngineView._engineStore.changeEngine(aEngine, "alias", keyword);
+    gEngineView.invalidate();
+    return true;
+  },
+
+  saveOneClickEnginesList() {
+    let hiddenList = [];
+    for (let engine of gEngineView._engineStore.engines) {
+      if (!engine.shown) {
+        hiddenList.push(engine.name);
+      }
+    }
+    Preferences.get("browser.search.hiddenOneOffs").value =
+      hiddenList.join(",");
+  },
+
+  async setDefaultEngine() {
+    await Services.search.setDefault(
+      document.getElementById("defaultEngine").selectedItem.engine,
+      Ci.nsISearchService.CHANGE_REASON_USER
+    );
+    if (ExtensionSettingsStore.getSetting(SEARCH_TYPE, SEARCH_KEY) !== null) {
+      ExtensionSettingsStore.select(
+        ExtensionSettingsStore.SETTING_USER_SET,
+        SEARCH_TYPE,
+        SEARCH_KEY
+      );
+    }
+  },
+
+  async setDefaultPrivateEngine() {
+    await Services.search.setDefaultPrivate(
+      document.getElementById("defaultPrivateEngine").selectedItem.engine,
+      Ci.nsISearchService.CHANGE_REASON_USER
+    );
+  },
+};
+
+function onDragEngineStart(event) {
+  var selectedIndex = gEngineView.selectedIndex;
+
+  // Local shortcut rows can't be dragged or re-ordered.
+  if (gEngineView._getLocalShortcut(selectedIndex)) {
+    event.preventDefault();
+    return;
+  }
+
+  var tree = document.getElementById("engineList");
+  let cell = tree.getCellAt(event.clientX, event.clientY);
+  if (selectedIndex >= 0 && !gEngineView.isCheckBox(cell.row, cell.col)) {
+    event.dataTransfer.setData(ENGINE_FLAVOR, selectedIndex.toString());
+    event.dataTransfer.effectAllowed = "move";
+  }
+}
+
+function EngineStore() {
+  let pref = Preferences.get("browser.search.hiddenOneOffs").value;
+  this.hiddenList = pref ? pref.split(",") : [];
+
+  this._engines = [];
+  this._defaultEngines = [];
+  Promise.all([
+    Services.search.getVisibleEngines(),
+    Services.search.getAppProvidedEngines(),
+  ]).then(([visibleEngines, defaultEngines]) => {
+    for (let engine of visibleEngines) {
+      this.addEngine(engine);
+      gEngineView.rowCountChanged(gEngineView.lastEngineIndex, 1);
+    }
+    this._defaultEngines = defaultEngines.map(this._cloneEngine, this);
+    gSearchPane.buildDefaultEngineDropDowns();
+
+    // check if we need to disable the restore defaults button
+    var someHidden = this._defaultEngines.some(e => e.hidden);
+    gSearchPane.showRestoreDefaults(someHidden);
+  });
+}
+EngineStore.prototype = {
+  _engines: null,
+  _defaultEngines: null,
+
+  get engines() {
+    return this._engines;
+  },
+  set engines(val) {
+    this._engines = val;
+  },
+
+  _getIndexForEngine(aEngine) {
+    return this._engines.indexOf(aEngine);
+  },
+
+  _getEngineByName(aName) {
+    return this._engines.find(engine => engine.name == aName);
+  },
+
+  _cloneEngine(aEngine) {
+    var clonedObj = {};
+    for (let i of ["id", "name", "alias", "iconURI", "hidden"]) {
+      clonedObj[i] = aEngine[i];
+    }
+    clonedObj.originalEngine = aEngine;
+    clonedObj.shown = !this.hiddenList.includes(clonedObj.name);
+    return clonedObj;
+  },
+
+  // Callback for Array's some(). A thisObj must be passed to some()
+  _isSameEngine(aEngineClone) {
+    return aEngineClone.originalEngine.id == this.originalEngine.id;
+  },
+
+  addEngine(aEngine) {
+    this._engines.push(this._cloneEngine(aEngine));
+  },
+
+  updateEngine(newEngine) {
+    let engineToUpdate = this._engines.findIndex(
+      e => e.originalEngine.id == newEngine.id
+    );
+    if (engineToUpdate != -1) {
+      this.engines[engineToUpdate] = this._cloneEngine(newEngine);
+    }
+  },
+
+  moveEngine(aEngine, aNewIndex) {
+    if (aNewIndex < 0 || aNewIndex > this._engines.length - 1) {
+      throw new Error("ES_moveEngine: invalid aNewIndex!");
+    }
+    var index = this._getIndexForEngine(aEngine);
+    if (index == -1) {
+      throw new Error("ES_moveEngine: invalid engine?");
+    }
+
+    if (index == aNewIndex) {
+      return Promise.resolve();
+    } // nothing to do
+
+    // Move the engine in our internal store
+    var removedEngine = this._engines.splice(index, 1)[0];
+    this._engines.splice(aNewIndex, 0, removedEngine);
+
+    return Services.search.moveEngine(aEngine.originalEngine, aNewIndex);
+  },
+
+  removeEngine(aEngine) {
+    if (this._engines.length == 1) {
+      throw new Error("Cannot remove last engine!");
+    }
+
+    let engineName = aEngine.name;
+    let index = this._engines.findIndex(element => element.name == engineName);
+
+    if (index == -1) {
+      throw new Error("invalid engine?");
+    }
+
+    this._engines.splice(index, 1)[0];
+
+    if (aEngine.isAppProvided) {
+      gSearchPane.showRestoreDefaults(true);
+    }
+    gSearchPane.buildDefaultEngineDropDowns();
+    return index;
+  },
+
+  async restoreDefaultEngines() {
+    var added = 0;
+
+    for (var i = 0; i < this._defaultEngines.length; ++i) {
+      var e = this._defaultEngines[i];
+
+      // If the engine is already in the list, just move it.
+      if (this._engines.some(this._isSameEngine, e)) {
+        await this.moveEngine(this._getEngineByName(e.name), i);
+      } else {
+        // Otherwise, add it back to our internal store
+
+        // The search service removes the alias when an engine is hidden,
+        // so clear any alias we may have cached before unhiding the engine.
+        e.alias = "";
+
+        this._engines.splice(i, 0, e);
+        let engine = e.originalEngine;
+        engine.hidden = false;
+        await Services.search.moveEngine(engine, i);
+        added++;
+      }
+    }
+
+    // We can't do this as part of the loop above because the indices are
+    // used for moving engines.
+    let policyRemovedEngineNames =
+      Services.policies.getActivePolicies()?.SearchEngines?.Remove || [];
+    for (let engineName of policyRemovedEngineNames) {
+      let engine = Services.search.getEngineByName(engineName);
+      if (engine) {
+        try {
+          await Services.search.removeEngine(engine);
+        } catch (ex) {
+          // Engine might not exist
+        }
+      }
+    }
+
+    Services.search.resetToAppDefaultEngine();
+    gSearchPane.showRestoreDefaults(false);
+    gSearchPane.buildDefaultEngineDropDowns();
+    return added;
+  },
+
+  changeEngine(aEngine, aProp, aNewValue) {
+    var index = this._getIndexForEngine(aEngine);
+    if (index == -1) {
+      throw new Error("invalid engine?");
+    }
+
+    this._engines[index][aProp] = aNewValue;
+    aEngine.originalEngine[aProp] = aNewValue;
+  },
+
+  reloadIcons() {
+    this._engines.forEach(function (e) {
+      e.iconURI = e.originalEngine.iconURI;
+    });
+  },
+};
+
+function EngineView(aEngineStore) {
+  this._engineStore = aEngineStore;
+
+  UrlbarPrefs.addObserver(this);
+
+  this.loadL10nNames();
+}
+
+EngineView.prototype = {
+  _engineStore: null,
+  tree: null,
+
+  loadL10nNames() {
+    // This maps local shortcut sources to their l10n names.  The names are needed
+    // by getCellText.  Getting the names is async but getCellText is not, so we
+    // cache them here to retrieve them syncronously in getCellText.
+    this._localShortcutL10nNames = new Map();
+    return document.l10n
+      .formatValues(
+        UrlbarUtils.LOCAL_SEARCH_MODES.map(mode => {
+          let name = UrlbarUtils.getResultSourceName(mode.source);
+          return { id: `urlbar-search-mode-${name}` };
+        })
+      )
+      .then(names => {
+        for (let { source } of UrlbarUtils.LOCAL_SEARCH_MODES) {
+          this._localShortcutL10nNames.set(source, names.shift());
+        }
+        // Invalidate the tree now that we have the names in case getCellText was
+        // called before name retrieval finished.
+        this.invalidate();
+      });
+  },
+
+  get lastEngineIndex() {
+    return this._engineStore.engines.length - 1;
+  },
+
+  get selectedIndex() {
+    var seln = this.selection;
+    if (seln.getRangeCount() > 0) {
+      var min = {};
+      seln.getRangeAt(0, min, {});
+      return min.value;
+    }
+    return -1;
+  },
+
+  get selectedEngine() {
+    return this._engineStore.engines[this.selectedIndex];
+  },
+
+  // Helpers
+  rowCountChanged(index, count) {
+    if (this.tree) {
+      this.tree.rowCountChanged(index, count);
+    }
+  },
+
+  invalidate() {
+    this.tree?.invalidate();
+  },
+
+  ensureRowIsVisible(index) {
+    this.tree.ensureRowIsVisible(index);
+  },
+
+  getSourceIndexFromDrag(dataTransfer) {
+    return parseInt(dataTransfer.getData(ENGINE_FLAVOR));
+  },
+
+  isCheckBox(index, column) {
+    return column.id == "engineShown";
+  },
+
+  isEngineSelectedAndRemovable() {
+    let defaultEngine = Services.search.defaultEngine;
+    let defaultPrivateEngine = Services.search.defaultPrivateEngine;
+    // We don't allow the last remaining engine to be removed, thus the
+    // `this.lastEngineIndex != 0` check.
+    // We don't allow the default engine to be removed.
+    return (
+      this.selectedIndex != -1 &&
+      this.lastEngineIndex != 0 &&
+      !this._getLocalShortcut(this.selectedIndex) &&
+      this.selectedEngine.name != defaultEngine.name &&
+      this.selectedEngine.name != defaultPrivateEngine.name
+    );
+  },
+
+  /**
+   * Returns the local shortcut corresponding to a tree row, or null if the row
+   * is not a local shortcut.
+   *
+   * @param {number} index
+   *   The tree row index.
+   * @returns {object}
+   *   The local shortcut object or null if the row is not a local shortcut.
+   */
+  _getLocalShortcut(index) {
+    let engineCount = this._engineStore.engines.length;
+    if (index < engineCount) {
+      return null;
+    }
+    return UrlbarUtils.LOCAL_SEARCH_MODES[index - engineCount];
+  },
+
+  /**
+   * Called by UrlbarPrefs when a urlbar pref changes.
+   *
+   * @param {string} pref
+   *   The name of the pref relative to the browser.urlbar branch.
+   */
+  onPrefChanged(pref) {
+    // If one of the local shortcut prefs was toggled, toggle its row's
+    // checkbox.
+    let parts = pref.split(".");
+    if (parts[0] == "shortcuts" && parts[1] && parts.length == 2) {
+      this.invalidate();
+    }
+  },
+
+  // nsITreeView
+  get rowCount() {
+    return (
+      this._engineStore.engines.length + UrlbarUtils.LOCAL_SEARCH_MODES.length
+    );
+  },
+
+  getImageSrc(index, column) {
+    if (column.id == "engineName") {
+      let shortcut = this._getLocalShortcut(index);
+      if (shortcut) {
+        return shortcut.icon;
+      }
+
+      if (this._engineStore.engines[index].iconURI) {
+        return this._engineStore.engines[index].iconURI.spec;
+      }
+
+      if (window.devicePixelRatio > 1) {
+        return "chrome://browser/skin/search-engine-placeholder@2x.png";
+      }
+      return "chrome://browser/skin/search-engine-placeholder.png";
+    }
+
+    return "";
+  },
+
+  getCellText(index, column) {
+    if (column.id == "engineName") {
+      let shortcut = this._getLocalShortcut(index);
+      if (shortcut) {
+        return this._localShortcutL10nNames.get(shortcut.source) || "";
+      }
+      return this._engineStore.engines[index].name;
+    } else if (column.id == "engineKeyword") {
+      let shortcut = this._getLocalShortcut(index);
+      if (shortcut) {
+        return shortcut.restrict;
+      }
+      return this._engineStore.engines[index].originalEngine.aliases.join(", ");
+    }
+    return "";
+  },
+
+  setTree(tree) {
+    this.tree = tree;
+  },
+
+  canDrop(targetIndex, orientation, dataTransfer) {
+    var sourceIndex = this.getSourceIndexFromDrag(dataTransfer);
+    return (
+      sourceIndex != -1 &&
+      sourceIndex != targetIndex &&
+      sourceIndex != targetIndex + orientation &&
+      // Local shortcut rows can't be dragged or dropped on.
+      targetIndex < this._engineStore.engines.length
+    );
+  },
+
+  async drop(dropIndex, orientation, dataTransfer) {
+    // Local shortcut rows can't be dragged or dropped on.  This can sometimes
+    // be reached even though canDrop returns false for these rows.
+    if (this._engineStore.engines.length <= dropIndex) {
+      return;
+    }
+
+    var sourceIndex = this.getSourceIndexFromDrag(dataTransfer);
+    var sourceEngine = this._engineStore.engines[sourceIndex];
+
+    const nsITreeView = Ci.nsITreeView;
+    if (dropIndex > sourceIndex) {
+      if (orientation == nsITreeView.DROP_BEFORE) {
+        dropIndex--;
+      }
+    } else if (orientation == nsITreeView.DROP_AFTER) {
+      dropIndex++;
+    }
+
+    await this._engineStore.moveEngine(sourceEngine, dropIndex);
+    gSearchPane.showRestoreDefaults(true);
+    gSearchPane.buildDefaultEngineDropDowns();
+
+    // Redraw, and adjust selection
+    this.invalidate();
+    this.selection.select(dropIndex);
+  },
+
+  selection: null,
+  getRowProperties(index) {
+    return "";
+  },
+  getCellProperties(index, column) {
+    if (column.id == "engineName") {
+      // For local shortcut rows, return the result source name so we can style
+      // the icons in CSS.
+      let shortcut = this._getLocalShortcut(index);
+      if (shortcut) {
+        return UrlbarUtils.getResultSourceName(shortcut.source);
+      }
+    }
+    return "";
+  },
+  getColumnProperties(column) {
+    return "";
+  },
+  isContainer(index) {
+    return false;
+  },
+  isContainerOpen(index) {
+    return false;
+  },
+  isContainerEmpty(index) {
+    return false;
+  },
+  isSeparator(index) {
+    return false;
+  },
+  isSorted(index) {
+    return false;
+  },
+  getParentIndex(index) {
+    return -1;
+  },
+  hasNextSibling(parentIndex, index) {
+    return false;
+  },
+  getLevel(index) {
+    return 0;
+  },
+  getCellValue(index, column) {
+    if (column.id == "engineShown") {
+      let shortcut = this._getLocalShortcut(index);
+      if (shortcut) {
+        return UrlbarPrefs.get(shortcut.pref);
+      }
+      return this._engineStore.engines[index].shown;
+    }
+    return undefined;
+  },
+  toggleOpenState(index) {},
+  cycleHeader(column) {},
+  selectionChanged() {},
+  cycleCell(row, column) {},
+  isEditable(index, column) {
+    return (
+      column.id != "engineName" &&
+      (column.id == "engineShown" || !this._getLocalShortcut(index))
+    );
+  },
+  setCellValue(index, column, value) {
+    if (column.id == "engineShown") {
+      let shortcut = this._getLocalShortcut(index);
+      if (shortcut) {
+        UrlbarPrefs.set(shortcut.pref, value == "true");
+        this.invalidate();
+        return;
+      }
+      this._engineStore.engines[index].shown = value == "true";
+      gEngineView.invalidate();
+      gSearchPane.saveOneClickEnginesList();
+    }
+  },
+  setCellText(index, column, value) {
+    if (column.id == "engineKeyword") {
+      gSearchPane
+        .editKeyword(this._engineStore.engines[index], value)
+        .then(valid => {
+          if (!valid) {
+            gSearchPane.startEditingAlias(index);
+          }
+        });
+    }
+  },
+};