css_image_rewriter.h

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/*
 * Copyright 2011 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_REWRITER_PUBLIC_CSS_IMAGE_REWRITER_H_
#define NET_INSTAWEB_REWRITER_PUBLIC_CSS_IMAGE_REWRITER_H_

#include <cstddef>

#include "net/instaweb/rewriter/public/css_filter.h"
#include "net/instaweb/rewriter/public/css_hierarchy.h"
#include "net/instaweb/rewriter/public/resource_slot.h"
#include "net/instaweb/rewriter/public/rewrite_context.h"
#include "net/instaweb/rewriter/public/rewrite_driver.h"
#include "pagespeed/kernel/base/basictypes.h"
#include "pagespeed/kernel/http/google_url.h"

namespace Css {

class Values;

}  

namespace net_instaweb {

class CacheExtender;
class ImageCombineFilter;
class ImageRewriteFilter;
class MessageHandler;
class Statistics;

class CssImageRewriter {
 public:
  CssImageRewriter(CssFilter::Context* root_context,
                   CssFilter* filter,
                   CacheExtender* cache_extender,
                   ImageRewriteFilter* image_rewriter,
                   ImageCombineFilter* image_combiner);
  ~CssImageRewriter();

  static void InitStats(Statistics* statistics);

  bool RewriteCss(int64 image_inline_max_bytes,
                  RewriteContext* parent,
                  CssHierarchy* hierarchy,
                  MessageHandler* handler);

  bool FlatteningEnabled() const;

  bool RewritesEnabled(int64 image_inline_max_bytes) const;

  void RewriteSlot(const ResourceSlotPtr& slot,
                   int64 image_inline_max_bytes,
                   RewriteContext* parent);

  static void InheritChildImageInfo(RewriteContext* context);

 private:
  RewriteDriver* driver() const {
    return filter_->driver();
  }
  bool RewriteImport(RewriteContext* parent, CssHierarchy* hierarchy,
                     bool* is_authorized);
  bool RewriteImage(int64 image_inline_max_bytes, const GoogleUrl& trim_url,
                    const GoogleUrl& original_url, RewriteContext* parent,
                    Css::Values* values, size_t value_index,
                    bool* is_authorized);

  CssFilter* filter_;

  CssFilter::Context* root_context_;

  CacheExtender* cache_extender_;
  ImageCombineFilter* image_combiner_;
  ImageRewriteFilter* image_rewriter_;

  
};

}  

#endif