collapse_whitespace_filter.h

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/*
 * Copyright 2010 Google Inc.
 *
 * 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.
 */


#ifndef PAGESPEED_KERNEL_HTML_COLLAPSE_WHITESPACE_FILTER_H_
#define PAGESPEED_KERNEL_HTML_COLLAPSE_WHITESPACE_FILTER_H_

#include <vector>

#include "pagespeed/kernel/html/empty_html_filter.h"
#include "pagespeed/kernel/html/html_name.h"
#include "pagespeed/kernel/base/basictypes.h"

namespace net_instaweb {
class HtmlParse;
class HtmlElement;
class HtmlCharactersNode;

class CollapseWhitespaceFilter : public EmptyHtmlFilter {
 public:
  explicit CollapseWhitespaceFilter(HtmlParse* html_parse);
  virtual ~CollapseWhitespaceFilter();

  virtual void StartDocument();
  virtual void StartElement(HtmlElement* element);
  virtual void EndElement(HtmlElement* element);
  virtual void Characters(HtmlCharactersNode* characters);
  virtual const char* Name() const { return "CollapseWhitespace"; }

 private:
  HtmlParse* html_parse_;
  std::vector<HtmlName::Keyword> keyword_stack_;

  
};

}  

#endif