amp_document_filter.h

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/*
 * Copyright 2016 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_AMP_DOCUMENT_FILTER_H_
#define PAGESPEED_KERNEL_HTML_AMP_DOCUMENT_FILTER_H_

#include <memory>

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

namespace net_instaweb {

class HtmlElement;
class HtmlParse;

class AmpDocumentFilter : public EmptyHtmlFilter {
 public:
  static const char kUtf8LightningBolt[];
  static const char kInvalidAmpDirectiveComment[];

  typedef Callback1<bool> BoolCallback;

  AmpDocumentFilter(HtmlParse* html_parse, BoolCallback* discovered);
  virtual ~AmpDocumentFilter();

  void StartDocument() override;
  void EndDocument() override;
  void StartElement(HtmlElement* element) override;
  void Characters(HtmlCharactersNode* chars) override;

  const char* Name() const override { return "AmpDocumentFilter"; }

 private:
  HtmlParse* html_parse_;
  bool is_known_;
  bool saw_doctype_;
  std::unique_ptr<BoolCallback> discovered_;

  
};

}  

#endif