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