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      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_
     63