chrome/browser/favicon/favicon_handler_delegate.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_FAVICON_FAVICON_HANDLER_DELEGATE_H_
   6 #define CHROME_BROWSER_FAVICON_FAVICON_HANDLER_DELEGATE_H_
   7
   8 class GURL;
   9
  10 namespace content {
  11 class NavigationEntry;
  12 }
  13
  14 // This class provides a delegate interface for a FaviconHandler.  It allows the
  15 // FaviconHandler to ask its delegate for information or notify its delegate
  16 // about changes.
  17 class FaviconHandlerDelegate {
  18  public:
  19   // Returns the current NavigationEntry.
  20   virtual content::NavigationEntry* GetActiveEntry() = 0;
  21
  22   // Starts the download for the given favicon. When finished, the delegate
  23   // will call OnDidDownloadFavicon() with the results.
  24   // Returns the unique id of the download request. The id will be passed
  25   // in OnDidDownloadFavicon().
  26   // Bitmaps with pixel sizes larger than |max_bitmap_size| are filtered out
  27   // from the bitmap results. If there are no bitmap results <=
  28   // |max_bitmap_size|, the smallest bitmap is resized to |max_bitmap_size| and
  29   // is the only result. A |max_bitmap_size| of 0 means unlimited.
  30   virtual int StartDownload(const GURL& url, int max_bitmap_size) = 0;
  31
  32   // Notifies the delegate that the favicon for the active entry was updated.
  33   // |icon_url_changed| is true if a favicon with a different icon URL has
  34   // been selected since the previous call to NotifyFaviconUpdated().
  35   virtual void NotifyFaviconUpdated(bool icon_url_changed) = 0;
  36 };
  37
  38 #endif  // CHROME_BROWSER_FAVICON_FAVICON_HANDLER_DELEGATE_H_