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 #include "url/gurl.h"
  11
  12 class SkBitmap;
  13
  14 namespace content {
  15 struct FaviconURL;
  16 }
  17
  18 namespace gfx {
  19 class Size;
  20 }
  21
  22 namespace android_webview {
  23
  24 // A helper that observes favicon changes for Webview.
  25 class IconHelper : public content::WebContentsObserver {
  26  public:
  27   class Listener {
  28    public:
  29     virtual bool ShouldDownloadFavicon(const GURL& icon_url) = 0;
  30     virtual void OnReceivedIcon(const GURL& icon_url,
  31                                 const SkBitmap& bitmap) = 0;
  32     virtual void OnReceivedTouchIconUrl(const std::string& url,
  33                                         const bool precomposed) = 0;
  34    protected:
  35     virtual ~Listener() {}
  36   };
  37
  38   explicit IconHelper(content::WebContents* web_contents);
  39   virtual ~IconHelper();
  40
  41   void SetListener(Listener* listener);
  42
  43   // From WebContentsObserver
  44   virtual void DidUpdateFaviconURL(int32 page_id,
  45       const std::vector<content::FaviconURL>& candidates) OVERRIDE;
  46
  47   void DownloadFaviconCallback(
  48       int id,
  49       int http_status_code,
  50       const GURL& image_url,
  51       const std::vector<SkBitmap>& bitmaps,
  52       const std::vector<gfx::Size>& original_bitmap_sizes);
  53
  54  private:
  55   Listener* listener_;
  56
  57   DISALLOW_COPY_AND_ASSIGN(IconHelper);
  58 };
  59
  60 }  // namespace android_webview
  61
  62 #endif  // ANDROID_WEBVIEW_BROWSER_ICON_HELPER_H_