html_writer_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_HTML_WRITER_FILTER_H_
#define PAGESPEED_KERNEL_HTML_HTML_WRITER_FILTER_H_

#include "pagespeed/kernel/base/basictypes.h"
#include "pagespeed/kernel/base/string.h"
#include "pagespeed/kernel/base/string_util.h"
#include "pagespeed/kernel/html/html_element.h"
#include "pagespeed/kernel/html/html_filter.h"
#include "pagespeed/kernel/html/html_name.h"
#include "pagespeed/kernel/html/html_node.h"

namespace net_instaweb {

class HtmlParse;
class Writer;

class HtmlWriterFilter : public HtmlFilter {
 public:
  explicit HtmlWriterFilter(HtmlParse* html_parse);

  void set_writer(Writer* writer) { writer_ = writer; }
  virtual ~HtmlWriterFilter();

  virtual void StartDocument();
  virtual void EndDocument();
  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 Characters(HtmlCharactersNode* characters);
  virtual void Directive(HtmlDirectiveNode* directive);
  virtual void Flush();
  virtual void DetermineEnabled(GoogleString* disabled_reason);
  virtual bool CanModifyUrls() { return false; }
  ScriptUsage GetScriptUsage() const override { return kNeverInjectsScripts; }

  void set_max_column(int max_column) { max_column_ = max_column; }
  void set_case_fold(bool case_fold) { case_fold_ = case_fold; }

  virtual const char* Name() const { return "HtmlWriter"; }

 protected:
  virtual void Clear();

  Writer* writer() { return writer_; }

  void TerminateLazyCloseElement();

 private:
  void EmitBytes(const StringPiece& str);

  void EmitName(const HtmlName& name);

  HtmlElement::Style GetElementStyle(HtmlElement* element);

  void EncodeBytes(const GoogleString& val, int quoteChar);

  HtmlParse* html_parse_;
  Writer* writer_;

  HtmlElement* lazy_close_element_;

  int column_;
  int max_column_;
  int write_errors_;
  bool case_fold_;
  GoogleString case_fold_buffer_;

  
};

}  

#endif