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// Copyright 2007 The Closure Library Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS-IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/**
* @fileoverview Definition of the Gecko specific range wrapper. Inherits most
* functionality from W3CRange, but adds exceptions as necessary.
*
* DO NOT USE THIS FILE DIRECTLY. Use goog.dom.Range instead.
*
* @author robbyw@google.com (Robby Walker)
*/
goog.provide('goog.dom.browserrange.GeckoRange');
goog.require('goog.dom.browserrange.W3cRange');
/**
* The constructor for Gecko specific browser ranges.
* @param {Range} range The range object.
* @constructor
* @extends {goog.dom.browserrange.W3cRange}
*/
goog.dom.browserrange.GeckoRange = function(range) {
goog.dom.browserrange.W3cRange.call(this, range);
};
goog.inherits(goog.dom.browserrange.GeckoRange, goog.dom.browserrange.W3cRange);
/**
* Creates a range object that selects the given node's text.
* @param {Node} node The node to select.
* @return {goog.dom.browserrange.GeckoRange} A Gecko range wrapper object.
*/
goog.dom.browserrange.GeckoRange.createFromNodeContents = function(node) {
return new goog.dom.browserrange.GeckoRange(
goog.dom.browserrange.W3cRange.getBrowserRangeForNode(node));
};
/**
* Creates a range object that selects between the given nodes.
* @param {Node} startNode The node to start with.
* @param {number} startOffset The offset within the node to start.
* @param {Node} endNode The node to end with.
* @param {number} endOffset The offset within the node to end.
* @return {goog.dom.browserrange.GeckoRange} A wrapper object.
*/
goog.dom.browserrange.GeckoRange.createFromNodes = function(startNode,
startOffset, endNode, endOffset) {
return new goog.dom.browserrange.GeckoRange(
goog.dom.browserrange.W3cRange.getBrowserRangeForNodes(startNode,
startOffset, endNode, endOffset));
};
/** @override */
goog.dom.browserrange.GeckoRange.prototype.selectInternal = function(
selection, reversed) {
if (!reversed || this.isCollapsed()) {
// The base implementation for select() is more robust, and works fine for
// collapsed and forward ranges. This works around
// https://bugzilla.mozilla.org/show_bug.cgi?id=773137, and is tested by
// range_test.html's testFocusedElementDisappears.
goog.base(this, 'selectInternal', selection, reversed);
} else {
// Reversed selection -- start with a caret on the end node, and extend it
// back to the start. Unfortunately, collapse() fails when focus is
// invalid.
selection.collapse(this.getEndNode(), this.getEndOffset());
selection.extend(this.getStartNode(), this.getStartOffset());
}
};
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