association_transformer.h

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/*
 * 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.
 */


#ifndef NET_INSTAWEB_REWRITER_PUBLIC_ASSOCIATION_TRANSFORMER_H_
#define NET_INSTAWEB_REWRITER_PUBLIC_ASSOCIATION_TRANSFORMER_H_

#include <map>

#include "net/instaweb/rewriter/public/css_tag_scanner.h"
#include "net/instaweb/rewriter/public/resource.h"
#include "net/instaweb/rewriter/public/resource_slot.h"
#include "pagespeed/kernel/base/basictypes.h"
#include "pagespeed/kernel/base/gtest_prod.h"
#include "pagespeed/kernel/base/string.h"
#include "pagespeed/kernel/base/string_util.h"

namespace net_instaweb {

class GoogleUrl;
class HtmlElement;
class MessageHandler;
class RewriteOptions;

class AssociationTransformer : public CssTagScanner::Transformer {
 public:
  AssociationTransformer(const GoogleUrl* base_url,
                         const RewriteOptions* options,
                         CssTagScanner::Transformer* backup_transformer,
                         MessageHandler* handler)
      : base_url_(base_url), options_(options),
        backup_transformer_(backup_transformer), handler_(handler) {}
  virtual ~AssociationTransformer();

  StringStringMap* map() { return &map_; }

  virtual TransformStatus Transform(GoogleString* str);

 private:
  StringStringMap map_;

  const GoogleUrl* base_url_;
  const RewriteOptions* options_;

  CssTagScanner::Transformer* backup_transformer_;

  MessageHandler* handler_;

  FRIEND_TEST(AssociationTransformerTest, TransformsCorrectly);

  
};

class AssociationSlot : public ResourceSlot {
 public:
  AssociationSlot(ResourcePtr resource,
                  StringStringMap* map, const StringPiece& key)
      : ResourceSlot(resource), map_(map) {
    key.CopyToString(&key_);
  }
  virtual ~AssociationSlot();

  virtual HtmlElement* element() const { return NULL; }

  virtual void Render() {
    if (!resource()->is_authorized_domain()) {
      return;
    }
    if (!disable_rendering() && !preserve_urls()) {
      (*map_)[key_] = resource()->url();
    }
  }

  virtual bool DirectSetUrl(const StringPiece& url) {
    if (!resource()->is_authorized_domain()) {
      return false;
    }
    url.CopyToString(&((*map_)[key_]));
    return true;
  }

  virtual GoogleString LocationString() const {
    return "Inside CSS";
  }

 private:
  StringStringMap* map_;
  GoogleString key_;

  
};

}  

#endif