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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CONTENT_RENDERER_FETCHERS_MULTI_RESOLUTION_IMAGE_RESOURCE_FETCHER_H_
      6 #define CONTENT_RENDERER_FETCHERS_MULTI_RESOLUTION_IMAGE_RESOURCE_FETCHER_H_
      7 
      8 #include <vector>
      9 
     10 #include "base/basictypes.h"
     11 #include "base/callback.h"
     12 #include "content/renderer/fetchers/resource_fetcher.h"
     13 
     14 class SkBitmap;
     15 
     16 namespace content {
     17 
     18 // A resource fetcher that returns all (differently-sized) frames in
     19 // an image. Useful for favicons.
     20 class MultiResolutionImageResourceFetcher{
     21  public:
     22   typedef base::Callback<void(MultiResolutionImageResourceFetcher*,
     23                               const std::vector<SkBitmap>&)> Callback;
     24 
     25   MultiResolutionImageResourceFetcher(
     26       const GURL& image_url,
     27       WebKit::WebFrame* frame,
     28       int id,
     29       WebKit::WebURLRequest::TargetType target_type,
     30       const Callback& callback);
     31 
     32   virtual ~MultiResolutionImageResourceFetcher();
     33 
     34   // URL of the image we're downloading.
     35   const GURL& image_url() const { return image_url_; }
     36 
     37   // Unique identifier for the request.
     38   int id() const { return id_; }
     39 
     40   // HTTP status code upon fetch completion.
     41   int http_status_code() const { return http_status_code_; }
     42 
     43  private:
     44   // ResourceFetcher::Callback. Decodes the image and invokes callback_.
     45   void OnURLFetchComplete(const WebKit::WebURLResponse& response,
     46                           const std::string& data);
     47 
     48   Callback callback_;
     49 
     50   // Unique identifier for the request.
     51   const int id_;
     52 
     53   // HTTP status code upon fetch completion.
     54   int http_status_code_;
     55 
     56   // URL of the image.
     57   const GURL image_url_;
     58 
     59   // Does the actual download.
     60   scoped_ptr<ResourceFetcher> fetcher_;
     61 
     62   DISALLOW_COPY_AND_ASSIGN(MultiResolutionImageResourceFetcher);
     63 };
     64 
     65 }  // namespace content
     66 
     67 #endif  // CONTENT_RENDERER_FETCHERS_MULTI_RESOLUTION_IMAGE_RESOURCE_FETCHER_H_
     68