webkit/glue/image_resource_fetcher.h

   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 WEBKIT_GLUE_IMAGE_RESOURCE_FETCHER_H_
   6 #define WEBKIT_GLUE_IMAGE_RESOURCE_FETCHER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/callback.h"
  10 #include "webkit/glue/resource_fetcher.h"
  11 #include "webkit/glue/webkit_glue_export.h"
  12
  13 class SkBitmap;
  14
  15 namespace webkit_glue {
  16
  17 // ImageResourceFetcher handles downloading an image for a webview. Once
  18 // downloading is done the supplied callback is notified. ImageResourceFetcher
  19 // is used to download the favicon and images for web apps.
  20 class ImageResourceFetcher {
  21  public:
  22   typedef base::Callback<void(ImageResourceFetcher*, const SkBitmap&)> Callback;
  23
  24   WEBKIT_GLUE_EXPORT ImageResourceFetcher(
  25       const GURL& image_url,
  26       WebKit::WebFrame* frame,
  27       int id,
  28       int image_size,
  29       WebKit::WebURLRequest::TargetType target_type,
  30       const Callback& callback);
  31
  32   WEBKIT_GLUE_EXPORT virtual ~ImageResourceFetcher();
  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  private:
  41   // ResourceFetcher::Callback. Decodes the image and invokes callback_.
  42   void OnURLFetchComplete(const WebKit::WebURLResponse& response,
  43                           const std::string& data);
  44
  45   Callback callback_;
  46
  47   // Unique identifier for the request.
  48   const int id_;
  49
  50   // URL of the image.
  51   const GURL image_url_;
  52
  53   // The size of the image. This is only a hint that is used if the image
  54   // contains multiple sizes. A value of 0 results in using the first frame
  55   // of the image.
  56   const int image_size_;
  57
  58   // Does the actual download.
  59   scoped_ptr<ResourceFetcher> fetcher_;
  60
  61   DISALLOW_COPY_AND_ASSIGN(ImageResourceFetcher);
  62 };
  63
  64 }  // namespace webkit_glue
  65
  66 #endif  // WEBKIT_GLUE_IMAGE_RESOURCE_FETCHER_H_