1// Copyright (c) 2011 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5/** 6 * @fileoverview This is a single selection model for table 7 */ 8cr.define('cr.ui.table', function() { 9 const ListSingleSelectionModel = cr.ui.ListSingleSelectionModel; 10 11 /** 12 * Creates a new selection model that is to be used with tables. 13 * This implementation supports single selection. 14 * Selected item is stored, not index, so selection is preserved 15 * after items reordering (e.g. because of sort). 16 * @param {number=} opt_length The number of items in the selection. 17 * @constructor 18 * @extends {!cr.EventTarget} 19 */ 20 function TableSingleSelectionModel(opt_length) { 21 ListSingleSelectionModel.apply(this, arguments); 22 } 23 24 TableSingleSelectionModel.prototype = { 25 __proto__: ListSingleSelectionModel.prototype, 26 27 28 /** 29 * Adjusts the selection after reordering of items in the table. 30 * @param {!Array.<number>} permutation The reordering permutation. 31 */ 32 adjustToReordering: function(permutation) { 33 if (this.leadIndex != -1) 34 this.leadIndex = permutation[this.leadIndex]; 35 36 var oldSelectedIndex = this.selectedIndex; 37 if (oldSelectedIndex != -1) { 38 this.selectedIndex = permutation[oldSelectedIndex]; 39 } 40 }, 41 42 /** 43 * Adjust the selection by adding or removing a certain numbers of items. 44 * This should be called by the owner of the selection model as items are 45 * added and removed from the underlying data model. 46 * @param {number} index The index of the first change. 47 * @param {number} itemsRemoved Number of items removed. 48 * @param {number} itemsAdded Number of items added. 49 */ 50 adjust: function(index, itemsRemoved, itemsAdded) { 51 ListSingleSelectionModel.prototype.adjust.call( 52 this, this.length, itemsRemoved, itemsAdded); 53 } 54 }; 55 56 return { 57 TableSingleSelectionModel: TableSingleSelectionModel 58 }; 59}); 60