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| 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_DOWNLOAD_HELPER_H_ |
| 6 #define CHROME_BROWSER_FAVICON_FAVICON_DOWNLOAD_HELPER_H_ |
| 7 |
| 8 #include <vector> |
| 9 |
| 10 #include "base/basictypes.h" |
| 11 #include "base/memory/ref_counted.h" |
| 12 #include "chrome/common/favicon_url.h" |
| 13 #include "content/public/browser/web_contents_observer.h" |
| 14 |
| 15 namespace content { |
| 16 class WebContents; |
| 17 } |
| 18 |
| 19 namespace gfx { |
| 20 class Image; |
| 21 } |
| 22 |
| 23 class GURL; |
| 24 class FaviconDownloadHelperDelegate; |
| 25 class SkBitmap; |
| 26 |
| 27 // FaviconDownloadHelper handles requests to download favicons, and listens for |
| 28 // the IPC messages from the renderer. |
| 29 class FaviconDownloadHelper : public content::WebContentsObserver { |
| 30 public: |
| 31 FaviconDownloadHelper(content::WebContents* web_contents, |
| 32 FaviconDownloadHelperDelegate* delegate); |
| 33 |
| 34 virtual ~FaviconDownloadHelper(); |
| 35 |
| 36 // Download the favicon at |url|. Returns the unique id of the download |
| 37 // request. The id will be passed to |
| 38 // FaviconDownloadHelperDelegate::OnDidDownloadFavicon() once the favicon has |
| 39 // been retrieved. |
| 40 // Note that |image_size| is a hint for images with multiple sizes. The |
| 41 // downloaded image is not resized to the given image_size. If 0 is passed, |
| 42 // the first frame of the image is returned. |
| 43 int DownloadFavicon(const GURL& url, int image_size); |
| 44 |
| 45 protected: |
| 46 // content::WebContentsObserver overrides. |
| 47 virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE; |
| 48 |
| 49 private: |
| 50 typedef std::set<int> DownloadIdList; |
| 51 |
| 52 // Message handler for IconHostMsg_DidDownloadFavicon. Called when the icon |
| 53 // at |image_url| has been downloaded. |
| 54 // |bitmaps| is a list of all the frames of the icon at |image_url|. |
| 55 void OnDidDownloadFavicon(int id, |
| 56 const GURL& image_url, |
| 57 bool errored, |
| 58 int requested_size, |
| 59 const std::vector<SkBitmap>& bitmaps); |
| 60 |
| 61 // Message Handler, called when the FaviconURL associated with the specified |
| 62 // page is updated. |
| 63 void OnUpdateFaviconURL(int32 page_id, |
| 64 const std::vector<FaviconURL>& candidates); |
| 65 |
| 66 // Delegate to pass Favicon bitmaps back to. Weak. |
| 67 FaviconDownloadHelperDelegate* delegate_; |
| 68 |
| 69 // Ids of pending downloads. |
| 70 DownloadIdList download_ids_; |
| 71 |
| 72 DISALLOW_IMPLICIT_CONSTRUCTORS(FaviconDownloadHelper); |
| 73 }; |
| 74 |
| 75 #endif // CHROME_BROWSER_FAVICON_FAVICON_DOWNLOAD_HELPER_H_ |
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