Home | History | Annotate | Download | only in fetchers 
      1 // Copyright (c) 2011 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_IMAGE_RESOURCE_FETCHER_H_
      6 #define CONTENT_RENDERER_FETCHERS_IMAGE_RESOURCE_FETCHER_H_
      7 
      8 #include "base/basictypes.h"
      9 #include "base/callback.h"
     10 #include "base/memory/scoped_ptr.h"
     11 #include "third_party/WebKit/public/platform/WebURLRequest.h"
     12 #include "url/gurl.h"
     13 
     14 class SkBitmap;
     15 
     16 namespace blink {
     17 class WebFrame;
     18 class WebURLResponse;
     19 }
     20 
     21 namespace content {
     22 
     23 class ResourceFetcher;
     24 
     25 // ImageResourceFetcher handles downloading an image for a webview. Once
     26 // downloading is done the supplied callback is notified. ImageResourceFetcher
     27 // is used to download the favicon and images for web apps.
     28 class ImageResourceFetcher {
     29  public:
     30   typedef base::Callback<void(ImageResourceFetcher*, const SkBitmap&)> Callback;
     31 
     32   ImageResourceFetcher(
     33       const GURL& image_url,
     34       blink::WebFrame* frame,
     35       int id,
     36       int image_size,
     37       blink::WebURLRequest::TargetType target_type,
     38       const Callback& callback);
     39 
     40   virtual ~ImageResourceFetcher();
     41 
     42   // URL of the image we're downloading.
     43   const GURL& image_url() const { return image_url_; }
     44 
     45   // Unique identifier for the request.
     46   int id() const { return id_; }
     47 
     48  private:
     49   // ResourceFetcher::Callback. Decodes the image and invokes callback_.
     50   void OnURLFetchComplete(const blink::WebURLResponse& response,
     51                           const std::string& data);
     52 
     53   Callback callback_;
     54 
     55   // Unique identifier for the request.
     56   const int id_;
     57 
     58   // URL of the image.
     59   const GURL image_url_;
     60 
     61   // The size of the image. This is only a hint that is used if the image
     62   // contains multiple sizes. A value of 0 results in using the first frame
     63   // of the image.
     64   const int image_size_;
     65 
     66   // Does the actual download.
     67   scoped_ptr<ResourceFetcher> fetcher_;
     68 
     69   DISALLOW_COPY_AND_ASSIGN(ImageResourceFetcher);
     70 };
     71 
     72 }  // namespace content
     73 
     74 #endif  // CONTENT_RENDERER_FETCHERS_IMAGE_RESOURCE_FETCHER_H_
     75