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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 Useful callback functions for the DOM matcher.
*
* @author robbyw@google.com (Robby Walker)
*/
goog.provide('goog.dom.pattern.callback');
goog.require('goog.dom');
goog.require('goog.dom.TagWalkType');
goog.require('goog.iter');
/**
* Callback function for use in {@link goog.dom.pattern.Matcher.addPattern}
* that removes the matched node from the tree. Should be used in conjunciton
* with a {@link goog.dom.pattern.StartTag} pattern.
*
* @param {Node} node The node matched by the pattern.
* @param {goog.dom.TagIterator} position The position where the match
* finished.
* @return {boolean} Returns true to indicate tree changes were made.
*/
goog.dom.pattern.callback.removeNode = function(node, position) {
// Find out which position would be next.
position.setPosition(node, goog.dom.TagWalkType.END_TAG);
goog.iter.nextOrValue(position, null);
// Remove the node.
goog.dom.removeNode(node);
// Correct for the depth change.
position.depth -= 1;
// Indicate that we made position/tree changes.
return true;
};
/**
* Callback function for use in {@link goog.dom.pattern.Matcher.addPattern}
* that removes the matched node from the tree and replaces it with its
* children. Should be used in conjunction with a
* {@link goog.dom.pattern.StartTag} pattern.
*
* @param {Element} node The node matched by the pattern.
* @param {goog.dom.TagIterator} position The position where the match
* finished.
* @return {boolean} Returns true to indicate tree changes were made.
*/
goog.dom.pattern.callback.flattenElement = function(node, position) {
// Find out which position would be next.
position.setPosition(node, node.firstChild ?
goog.dom.TagWalkType.START_TAG :
goog.dom.TagWalkType.END_TAG);
goog.iter.nextOrValue(position, null);
// Flatten the node.
goog.dom.flattenElement(node);
// Correct for the depth change.
position.depth -= 1;
// Indicate that we made position/tree changes.
return true;
};
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