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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 DOM pattern to match a tag and all of its children.
*
* @author robbyw@google.com (Robby Walker)
*/
goog.provide('goog.dom.pattern.FullTag');
goog.require('goog.dom.pattern.MatchType');
goog.require('goog.dom.pattern.StartTag');
goog.require('goog.dom.pattern.Tag');
/**
* Pattern object that matches a full tag including all its children.
*
* @param {string|RegExp} tag Name of the tag. Also will accept a regular
* expression to match against the tag name.
* @param {Object=} opt_attrs Optional map of attribute names to desired values.
* This pattern will only match when all attributes are present and match
* the string or regular expression value provided here.
* @param {Object=} opt_styles Optional map of CSS style names to desired
* values. This pattern will only match when all styles are present and
* match the string or regular expression value provided here.
* @param {Function=} opt_test Optional function that takes the element as a
* parameter and returns true if this pattern should match it.
* @constructor
* @extends {goog.dom.pattern.StartTag}
*/
goog.dom.pattern.FullTag = function(tag, opt_attrs, opt_styles, opt_test) {
goog.dom.pattern.StartTag.call(
this,
tag,
opt_attrs,
opt_styles,
opt_test);
};
goog.inherits(goog.dom.pattern.FullTag, goog.dom.pattern.StartTag);
/**
* Tracks the matcher's depth to detect the end of the tag.
*
* @type {number}
* @private
*/
goog.dom.pattern.FullTag.prototype.depth_ = 0;
/**
* Test whether the given token is a start tag token which matches the tag name,
* style, and attributes provided in the constructor.
*
* @param {Node} token Token to match against.
* @param {goog.dom.TagWalkType} type The type of token.
* @return {goog.dom.pattern.MatchType} <code>MATCH</code> at the end of our
* tag, <code>MATCHING</code> if we are within the tag, and
* <code>NO_MATCH</code> if the starting tag does not match.
* @override
*/
goog.dom.pattern.FullTag.prototype.matchToken = function(token, type) {
if (!this.depth_) {
// If we have not yet started, make sure we match as a StartTag.
if (goog.dom.pattern.Tag.prototype.matchToken.call(this, token, type)) {
this.depth_ = type;
return goog.dom.pattern.MatchType.MATCHING;
} else {
return goog.dom.pattern.MatchType.NO_MATCH;
}
} else {
this.depth_ += type;
return this.depth_ ?
goog.dom.pattern.MatchType.MATCHING :
goog.dom.pattern.MatchType.MATCH;
}
};
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