113 lines
4.1 KiB
JavaScript
113 lines
4.1 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 WebKit 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.WebKitRange');
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goog.require('goog.dom.RangeEndpoint');
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goog.require('goog.dom.browserrange.W3cRange');
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goog.require('goog.userAgent');
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/**
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* The constructor for WebKit 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.WebKitRange = 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.WebKitRange,
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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.WebKitRange} A WebKit range wrapper object.
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*/
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goog.dom.browserrange.WebKitRange.createFromNodeContents = function(node) {
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return new goog.dom.browserrange.WebKitRange(
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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 start node.
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* @param {Node} endNode The node to end with.
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* @param {number} endOffset The offset within the end node.
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* @return {goog.dom.browserrange.WebKitRange} A wrapper object.
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*/
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goog.dom.browserrange.WebKitRange.createFromNodes = function(startNode,
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startOffset, endNode, endOffset) {
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return new goog.dom.browserrange.WebKitRange(
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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.WebKitRange.prototype.compareBrowserRangeEndpoints =
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function(range, thisEndpoint, otherEndpoint) {
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// Webkit pre-528 has some bugs where compareBoundaryPoints() doesn't work the
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// way it is supposed to, but if we reverse the sense of two comparisons,
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// it works fine.
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// https://bugs.webkit.org/show_bug.cgi?id=20738
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if (goog.userAgent.isVersionOrHigher('528')) {
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return (goog.dom.browserrange.WebKitRange.superClass_.
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compareBrowserRangeEndpoints.call(
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this, range, thisEndpoint, otherEndpoint));
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}
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return this.range_.compareBoundaryPoints(
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otherEndpoint == goog.dom.RangeEndpoint.START ?
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(thisEndpoint == goog.dom.RangeEndpoint.START ?
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goog.global['Range'].START_TO_START :
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goog.global['Range'].END_TO_START) : // Sense reversed
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(thisEndpoint == goog.dom.RangeEndpoint.START ?
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goog.global['Range'].START_TO_END : // Sense reversed
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goog.global['Range'].END_TO_END),
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/** @type {Range} */ (range));
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};
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/** @override */
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goog.dom.browserrange.WebKitRange.prototype.selectInternal = function(
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selection, reversed) {
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// Unselect everything. This addresses a bug in Webkit where it sometimes
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// caches the old selection.
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// https://bugs.webkit.org/show_bug.cgi?id=20117
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selection.removeAllRanges();
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if (reversed) {
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selection.setBaseAndExtent(this.getEndNode(), this.getEndOffset(),
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this.getStartNode(), this.getStartOffset());
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} else {
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selection.setBaseAndExtent(this.getStartNode(), this.getStartOffset(),
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this.getEndNode(), this.getEndOffset());
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}
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};
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