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_UI_METRO_PIN_TAB_HELPER_WIN_H_
6#define CHROME_BROWSER_UI_METRO_PIN_TAB_HELPER_WIN_H_
7
8#include <vector>
9
10#include "content/public/browser/web_contents_observer.h"
11#include "content/public/browser/web_contents_user_data.h"
12#include "content/public/common/favicon_url.h"
13#include "third_party/skia/include/core/SkBitmap.h"
14#include "ui/gfx/image/image_skia.h"
15
16namespace gfx {
17class Size;
18}
19
20// Per-tab class to help manage metro pinning.
21class MetroPinTabHelper
22    : public content::WebContentsObserver,
23      public content::WebContentsUserData<MetroPinTabHelper> {
24 public:
25  virtual ~MetroPinTabHelper();
26
27  bool IsPinned() const;
28
29  void TogglePinnedToStartScreen();
30
31  // content::WebContentsObserver overrides:
32  virtual void DidNavigateMainFrame(
33      const content::LoadCommittedDetails& details,
34      const content::FrameNavigateParams& params) OVERRIDE;
35  virtual void DidUpdateFaviconURL(
36      const std::vector<content::FaviconURL>& candidates) OVERRIDE;
37
38 private:
39  // The FaviconDownloader class handles downloading the favicons when a page
40  // is being pinned. After it has downloaded any available favicons it will
41  // continue on with the page pinning action.
42  class FaviconChooser;
43
44  explicit MetroPinTabHelper(content::WebContents* web_contents);
45  friend class content::WebContentsUserData<MetroPinTabHelper>;
46
47  // Favicon download callback.
48  void DidDownloadFavicon(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  void UnPinPageFromStartScreen();
55
56  // Called by the |favicon_chooser_| when it has finished.
57  void FaviconDownloaderFinished();
58
59  // Candidate Favicon URLs for the current page.
60  std::vector<content::FaviconURL> favicon_url_candidates_;
61
62  // The currently active FaviconChooser, if there is one.
63  scoped_ptr<FaviconChooser> favicon_chooser_;
64
65
66  DISALLOW_COPY_AND_ASSIGN(MetroPinTabHelper);
67};
68
69#endif  // CHROME_BROWSER_UI_METRO_PIN_TAB_HELPER_WIN_H_
70