MD Bookmarks: Implement item selection in new data flow system

chrome/browser/resources/md_bookmarks/actions.js

 // Copyright 2017 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.
 
 /**
  * @fileoverview Module for functions which produce action objects. These are
  * listed in one place to document available actions and their parameters.
  */
 
 cr.define('bookmarks.actions', function() {
@@ skipping 62 matching lines @@
   }
 
   /** @return {!Action} */
   function clearSearch() {
     return {
       name: 'clear-search',
     };
   }
 
   /**
+   * @param {string} id
+   * @param {boolean} add
+   * @param {boolean} range
+   * @param {BookmarksPageState} state
+   * @return {!Action}
+   */
+  function selectItem(id, add, range, state) {
+    var anchor = state.selection.anchor;
+    var toSelect = [];
+
+    // TODO(tsergeant): Make it possible to deselect items by ctrl-clicking them
+    // again.
+    if (range && anchor) {
+      var displayedList = bookmarks.util.getDisplayedList(state);
+      var selectedIndex = displayedList.indexOf(id);
+      assert(selectedIndex != -1);
+      var anchorIndex = displayedList.indexOf(anchor);
+      if (anchorIndex == -1)
+        anchorIndex = selectedIndex;
+
+      var startIndex = Math.min(anchorIndex, selectedIndex);
+      var endIndex = Math.max(anchorIndex, selectedIndex);
+
+      for (var i = startIndex; i <= endIndex; i++)
+        toSelect.push(displayedList[i]);
+    } else {
+      toSelect.push(id);
+    }
+
+    return {
+      name: 'select-items',
+      add: add,
+      anchor: id,
+      items: toSelect,
+    };
+  }
+
+  /**
    * @param {string} term
    * @return {!Action}
    */
   function setSearchTerm(term) {
     if (!term)
       return clearSearch();
 
     return {
       name: 'start-search',
       term: term,
@@ skipping 11 matching lines @@
     };
   }
 
   return {
     changeFolderOpen: changeFolderOpen,
     clearSearch: clearSearch,
     editBookmark: editBookmark,
     refreshNodes: refreshNodes,
     removeBookmark: removeBookmark,
     selectFolder: selectFolder,
+    selectItem: selectItem,
     setSearchResults: setSearchResults,
     setSearchTerm: setSearchTerm,
   };
 });