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Side by Side Diff: chrome/browser/favicon/favicon_download_helper.h

Issue 11195010: Extract Favicon Download logic from FaviconTabHelper (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Created 8 years, 1 month ago
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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 // Message handler for IconHostMsg_DidDownloadFavicon. Called when the icon
sky 2012/10/30 21:39:09 nit: newline between 50/51.
Cait (Slow) 2012/10/31 19:26:32 Done.
52 // at |image_url| has been downloaded.
53 // |bitmaps| is a list of all the frames of the icon at |image_url|.
54 void OnDidDownloadFavicon(int id,
55 const GURL& image_url,
56 bool errored,
57 int requested_size,
58 const std::vector<SkBitmap>& bitmaps);
59
60 // Message Handler.
61 void OnUpdateFaviconURL(int32 page_id,
62 const std::vector<FaviconURL>& candidates);
63
64 // Delegate to pass Favicon bitmaps back to. Weak.
65 FaviconDownloadHelperDelegate* delegate_;
66
67 // Ids of pending downloads.
68 DownloadIdList download_ids_;
69
70 DISALLOW_IMPLICIT_CONSTRUCTORS(FaviconDownloadHelper);
71 };
72
73 #endif // CHROME_BROWSER_FAVICON_FAVICON_DOWNLOAD_HELPER_H_
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