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