/*
 * Copyright 2012 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.
 */

// Author: pulkitg@google.com (Pulkit Goyal)

#ifndef NET_INSTAWEB_REWRITER_PUBLIC_REWRITTEN_CONTENT_SCANNING_FILTER_H_
#define NET_INSTAWEB_REWRITER_PUBLIC_REWRITTEN_CONTENT_SCANNING_FILTER_H_

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

namespace net_instaweb {

class HtmlElement;
class RewriteDriver;

// This filter will scan the rewritten content and stores the number of
// rewritten resources in the property cache.
class RewrittenContentScanningFilter : public EmptyHtmlFilter {
 public:
  static const char kNumProxiedRewrittenResourcesProperty[];

  explicit RewrittenContentScanningFilter(RewriteDriver* driver);
  virtual ~RewrittenContentScanningFilter();

  virtual void StartDocument();
  virtual void EndDocument();
  virtual void StartElement(HtmlElement* element);

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

 private:
  RewriteDriver* driver_;
  int num_proxied_rewritten_resources_;
  DISALLOW_COPY_AND_ASSIGN(RewrittenContentScanningFilter);
};

}  // namespace net_instaweb
#endif  // NET_INSTAWEB_REWRITER_PUBLIC_REWRITTEN_CONTENT_SCANNING_FILTER_H_