| // 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; |
| }; |