chrome/browser/ui/ash/launcher/launcher_favicon_loader.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 CHROME_BROWSER_UI_ASH_LAUNCHER_LAUNCHER_FAVICON_LOADER_H_
   6 #define CHROME_BROWSER_UI_ASH_LAUNCHER_LAUNCHER_FAVICON_LOADER_H_
   7
   8 #include <vector>
   9
  10 #include "base/basictypes.h"
  11 #include "base/callback.h"
  12 #include "content/public/common/favicon_url.h"
  13
  14 class GURL;
  15 class SkBitmap;
  16
  17 namespace internal {
  18 class FaviconBitmapHandler;
  19 }
  20
  21 namespace content {
  22 class WebContents;
  23 }
  24
  25 // LauncherFaviconLoader handles updates to the list of favicon urls and
  26 // retrieves the appropriately sized favicon for panels in the Launcher.
  27
  28 class LauncherFaviconLoader {
  29  public:
  30   class Delegate {
  31    public:
  32     virtual void FaviconUpdated() = 0;
  33
  34    protected:
  35     virtual ~Delegate() {}
  36   };
  37
  38   LauncherFaviconLoader(Delegate* delegate,
  39                         content::WebContents* web_contents);
  40   virtual ~LauncherFaviconLoader();
  41
  42   content::WebContents* web_contents() {
  43     return web_contents_;
  44   }
  45
  46   // Returns an appropriately sized favicon for the Launcher. If none are
  47   // available will return an isNull bitmap.
  48   SkBitmap GetFavicon() const;
  49
  50   // Returns true if the loader is waiting for downloads to finish.
  51   bool HasPendingDownloads() const;
  52
  53  private:
  54   content::WebContents* web_contents_;
  55   scoped_ptr<internal::FaviconBitmapHandler> favicon_handler_;
  56
  57   DISALLOW_COPY_AND_ASSIGN(LauncherFaviconLoader);
  58 };
  59
  60 #endif  // CHROME_BROWSER_UI_ASH_LAUNCHER_LAUNCHER_FAVICON_LOADER_H_