content/renderer/fetchers/multi_resolution_image_resource_fetcher.h

   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 <string>
   9 #include <vector>
  10
  11 #include "base/basictypes.h"
  12 #include "base/callback.h"
  13 #include "base/memory/scoped_ptr.h"
  14 #include "third_party/WebKit/public/platform/WebURLRequest.h"
  15 #include "url/gurl.h"
  16
  17 class SkBitmap;
  18
  19 namespace blink {
  20 class WebFrame;
  21 class WebURLResponse;
  22 }
  23
  24 namespace content {
  25
  26 class ResourceFetcher;
  27
  28 // A resource fetcher that returns all (differently-sized) frames in
  29 // an image. Useful for favicons.
  30 class MultiResolutionImageResourceFetcher {
  31  public:
  32   typedef base::Callback<void(MultiResolutionImageResourceFetcher*,
  33                               const std::vector<SkBitmap>&)> Callback;
  34
  35   MultiResolutionImageResourceFetcher(
  36       const GURL& image_url,
  37       blink::WebFrame* frame,
  38       int id,
  39       blink::WebURLRequest::RequestContext request_context,
  40       blink::WebURLRequest::CachePolicy cache_policy,
  41       const Callback& callback);
  42
  43   virtual ~MultiResolutionImageResourceFetcher();
  44
  45   // URL of the image we're downloading.
  46   const GURL& image_url() const { return image_url_; }
  47
  48   // Unique identifier for the request.
  49   int id() const { return id_; }
  50
  51   // HTTP status code upon fetch completion.
  52   int http_status_code() const { return http_status_code_; }
  53
  54  private:
  55   // ResourceFetcher::Callback. Decodes the image and invokes callback_.
  56   void OnURLFetchComplete(const blink::WebURLResponse& response,
  57                           const std::string& data);
  58
  59   Callback callback_;
  60
  61   // Unique identifier for the request.
  62   const int id_;
  63
  64   // HTTP status code upon fetch completion.
  65   int http_status_code_;
  66
  67   // URL of the image.
  68   const GURL image_url_;
  69
  70   // Does the actual download.
  71   scoped_ptr<ResourceFetcher> fetcher_;
  72
  73   DISALLOW_COPY_AND_ASSIGN(MultiResolutionImageResourceFetcher);
  74 };
  75
  76 }  // namespace content
  77
  78 #endif  // CONTENT_RENDERER_FETCHERS_MULTI_RESOLUTION_IMAGE_RESOURCE_FETCHER_H_