| // 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 DOM pattern to match any children of a tag. |
| * |
| * @author robbyw@google.com (Robby Walker) |
| */ |
| |
| goog.provide('goog.dom.pattern.AllChildren'); |
| |
| goog.require('goog.dom.pattern.AbstractPattern'); |
| goog.require('goog.dom.pattern.MatchType'); |
| |
| |
| |
| /** |
| * Pattern object that matches any nodes at or below the current tree depth. |
| * |
| * @constructor |
| * @extends {goog.dom.pattern.AbstractPattern} |
| */ |
| goog.dom.pattern.AllChildren = function() { |
| }; |
| goog.inherits(goog.dom.pattern.AllChildren, goog.dom.pattern.AbstractPattern); |
| |
| |
| /** |
| * Tracks the matcher's depth to detect the end of the tag. |
| * |
| * @type {number} |
| * @private |
| */ |
| goog.dom.pattern.AllChildren.prototype.depth_ = 0; |
| |
| |
| /** |
| * Test whether the given token is on the same level. |
| * |
| * @param {Node} token Token to match against. |
| * @param {goog.dom.TagWalkType} type The type of token. |
| * @return {goog.dom.pattern.MatchType} {@code MATCHING} if the token is on the |
| * same level or deeper and {@code BACKTRACK_MATCH} if not. |
| * @override |
| */ |
| goog.dom.pattern.AllChildren.prototype.matchToken = function(token, type) { |
| this.depth_ += type; |
| |
| if (this.depth_ >= 0) { |
| return goog.dom.pattern.MatchType.MATCHING; |
| } else { |
| this.depth_ = 0; |
| return goog.dom.pattern.MatchType.BACKTRACK_MATCH; |
| } |
| }; |
| |
| |
| /** |
| * Reset any internal state this pattern keeps. |
| * @override |
| */ |
| goog.dom.pattern.AllChildren.prototype.reset = function() { |
| this.depth_ = 0; |
| }; |