Home | History | Annotate | Download | only in search 
      1 // Copyright 2013 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 CHROME_BROWSER_UI_APP_LIST_SEARCH_WEBSTORE_RESULT_ICON_SOURCE_H_
      6 #define CHROME_BROWSER_UI_APP_LIST_SEARCH_WEBSTORE_RESULT_ICON_SOURCE_H_
      7 
      8 #include "base/basictypes.h"
      9 #include "base/callback.h"
     10 #include "base/memory/ref_counted.h"
     11 #include "base/memory/scoped_ptr.h"
     12 #include "chrome/browser/image_decoder.h"
     13 #include "net/url_request/url_fetcher_delegate.h"
     14 #include "ui/gfx/image/image_skia.h"
     15 #include "ui/gfx/image/image_skia_source.h"
     16 #include "url/gurl.h"
     17 
     18 namespace net {
     19 class URLFetcher;
     20 class URLRequestContextGetter;
     21 }
     22 
     23 namespace app_list {
     24 
     25 // An ImageSkiaSource for the icon of web store result. It shows web store
     26 // icon before the app icon is fetched. When the app icon is fetched
     27 // successfully, it creates an representation using the app icon and web store
     28 // icon as a badge.
     29 class WebstoreResultIconSource : public gfx::ImageSkiaSource,
     30                                  public net::URLFetcherDelegate,
     31                                  public ImageDecoder::Delegate {
     32  public:
     33   typedef base::Closure IconLoadedCallback;
     34 
     35   WebstoreResultIconSource(const IconLoadedCallback& icon_loaded_callback,
     36                            net::URLRequestContextGetter* context_getter,
     37                            const GURL& icon_url,
     38                            int icon_size);
     39   virtual ~WebstoreResultIconSource();
     40 
     41  private:
     42   // Invoked from GetImageForScale to download the app icon when the hosting
     43   // ImageSkia gets painted on screen.
     44   void StartIconFetch();
     45 
     46   // Creates the result icon by putting a small web store icon on the bottom
     47   // right corner as a badge.
     48   gfx::ImageSkiaRep CreateBadgedIcon(ui::ScaleFactor scale_factor);
     49 
     50   // gfx::ImageSkiaSource overrides:
     51   virtual gfx::ImageSkiaRep GetImageForScale(
     52       ui::ScaleFactor scale_factor) OVERRIDE;
     53 
     54   // net::URLFetcherDelegate overrides:
     55   virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE;
     56 
     57   // ImageDecoder::Delegate overrides:
     58   virtual void OnImageDecoded(const ImageDecoder* decoder,
     59                               const SkBitmap& decoded_image) OVERRIDE;
     60   virtual void OnDecodeImageFailed(const ImageDecoder* decoder) OVERRIDE;
     61 
     62   IconLoadedCallback icon_loaded_callback_;
     63   net::URLRequestContextGetter* context_getter_;
     64   const GURL icon_url_;
     65   const int icon_size_;
     66 
     67   bool icon_fetch_attempted_;
     68   scoped_ptr<net::URLFetcher> icon_fetcher_;
     69 
     70   scoped_refptr<ImageDecoder> image_decoder_;
     71 
     72   gfx::ImageSkia icon_;
     73 
     74   DISALLOW_COPY_AND_ASSIGN(WebstoreResultIconSource);
     75 };
     76 
     77 }  // namespace app_list
     78 
     79 #endif  // CHROME_BROWSER_UI_APP_LIST_SEARCH_WEBSTORE_RESULT_ICON_SOURCE_H_
     80