DOMUI Prefs: Split search engines into two lists

chrome/browser/resources/options/list_inline_header_selection_controller.js

-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-cr.define('options', function() {
-  const ListSelectionController = cr.ui.ListSelectionController;
-
-  /**
-   * Creates a selection controller with a delegate that controls whether or
-   * not individual items are selectable. This is used for lists containing
-   * subgroups with headings that are in the list, since the headers themselves
-   * should not be selectable.
-   *
-   * @param {cr.ui.ListSelectionModel} selectionModel The selection model to
-   *     interact with.
-   * @param {*} selectabilityDelegate A delegate responding to
-   *     canSelectIndex(index).
-   *
-   * @constructor
-   * @extends {!cr.ui.ListSelectionController}
-   */
-  function ListInlineHeaderSelectionController(selectionModel,
-                                               selectabilityDelegate) {
-    ListSelectionController.call(this, selectionModel);
-    this.selectabilityDelegate_ = selectabilityDelegate;
-  }
-
-  ListInlineHeaderSelectionController.prototype = {
-    __proto__: ListSelectionController.prototype,
-
-    /** @inheritDoc */
-    getIndexBelow: function(index) {
-      var next = ListSelectionController.prototype.getIndexBelow.call(this,
-                                                                      index);
-      if (next == -1 || this.canSelect(next))
-        return next;
-      return this.getIndexBelow(next);
-    },
-
-    /** @inheritDoc */
-    getNextIndex: function(index) {
-      return this.getIndexBelow(index);
-    },
-
-    /** @inheritDoc */
-    getIndexAbove: function(index) {
-      var previous = ListSelectionController.prototype.getIndexAbove.call(
-          this, index);
-      if (previous == -1 || this.canSelect(previous))
-        return previous;
-      return this.getIndexAbove(previous);
-    },
-
-    /** @inheritDoc */
-    getPreviousIndex: function(index) {
-      return this.getIndexAbove(index);
-    },
-
-    /** @inheritDoc */
-    getFirstIndex: function(index) {
-      var first = ListSelectionController.prototype.getFirstIndex.call(this);
-      if (this.canSelect(first))
-        return first;
-      return this.getNextIndex(first);
-    },
-
-    /** @inheritDoc */
-    getLastIndex: function(index) {
-      var last = ListSelectionController.prototype.getLastIndex.call(this);
-      if (this.canSelect(last))
-        return last;
-      return this.getPreviousIndex(last);
-    },
-
-    /** @inheritDoc */
-    handleMouseDownUp: function(e, index) {
-      if (this.canSelect(index)) {
-        ListSelectionController.prototype.handleMouseDownUp.call(
-            this, e, index);
-      }
-    },
-
-    /**
-     * Returns true if the given index is selectable.
-     * @private
-     * @param {number} index The index to check.
-     */
-    canSelect: function(index) {
-      return this.selectabilityDelegate_.canSelectIndex(index);
-    }
-  };
-
-  return {
-    ListInlineHeaderSelectionController: ListInlineHeaderSelectionController
-  };
-});