logging_html_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 NET_INSTAWEB_HTMLPARSE_PUBLIC_LOGGING_HTML_FILTER_H_
#define NET_INSTAWEB_HTMLPARSE_PUBLIC_LOGGING_HTML_FILTER_H_

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

namespace net_instaweb {

class HtmlCdataNode;
class HtmlCommentNode;
class HtmlDirectiveNode;
class HtmlElement;
class HtmlIEDirectiveNode;
class StatisticsLog;

class LoggingFilter : public EmptyHtmlFilter {
 public:
  enum Statistic {
    MIN_STAT = 0,
    NUM_EXPLICIT_CLOSED = 0,
    NUM_IMPLICIT_CLOSED,
    NUM_BRIEF_CLOSED,
    NUM_CLOSED,
    NUM_UNCLOSED,
    NUM_SPURIOUS_CLOSED,
    NUM_TAGS,
    NUM_CDATA,
    NUM_COMMENTS,
    NUM_DIRECTIVES,
    NUM_DOCUMENTS,
    NUM_IE_DIRECTIVES,
    MAX_STAT
  };

  LoggingFilter();

  virtual void StartDocument();
  virtual void StartElement(HtmlElement* element);
  virtual void EndElement(HtmlElement* element);
  virtual void Cdata(HtmlCdataNode* cdata);
  virtual void Comment(HtmlCommentNode* comment);
  virtual void IEDirective(HtmlIEDirectiveNode* directive);
  virtual void Directive(HtmlDirectiveNode* directive);
  virtual const char* Name() const { return "Logging"; }

  inline int get(const Statistic statistic) const {
    return stats_[statistic];
  }


  void LogStatistics(StatisticsLog *statistics_log) const;

  void Reset();

 private:
  int stats_[MAX_STAT];

  
};

}  

#endif