android_webview/browser/icon_helper.h

   1 // Copyright (c) 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 ANDROID_WEBVIEW_BROWSER_ICON_HELPER_H_
   6 #define ANDROID_WEBVIEW_BROWSER_ICON_HELPER_H_
   7
   8 #include <string>
   9 #include "content/public/browser/web_contents_observer.h"
  10
  11 class SkBitmap;
  12
  13 namespace content {
  14 struct FaviconURL;
  15 }
  16
  17 namespace android_webview {
  18
  19 // A helper that observes favicon changes for Webview.
  20 class IconHelper : public content::WebContentsObserver {
  21  public:
  22   class Listener {
  23    public:
  24     virtual void OnReceivedIcon(const SkBitmap& bitmap) = 0;
  25     virtual void OnReceivedTouchIconUrl(const std::string& url,
  26                                         const bool precomposed) = 0;
  27    protected:
  28     virtual ~Listener() {}
  29   };
  30
  31   explicit IconHelper(content::WebContents* web_contents);
  32   virtual ~IconHelper();
  33
  34   void SetListener(Listener* listener);
  35
  36   // From WebContentsObserver
  37   virtual void DidUpdateFaviconURL(int32 page_id,
  38       const std::vector<content::FaviconURL>& candidates) OVERRIDE;
  39
  40   void DownloadFaviconCallback(int id, const GURL& image_url,
  41       int requested_size, const std::vector<SkBitmap>& bitmaps);
  42
  43  private:
  44   Listener* listener_;
  45
  46   DISALLOW_COPY_AND_ASSIGN(IconHelper);
  47 };
  48
  49 }  // namespace android_webview
  50
  51 #endif  // ANDROID_WEBVIEW_BROWSER_ICON_HELPER_H_