src/chrome/browser/ui/metro_pin_tab_helper_win.h

   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
  16 namespace gfx {
  17 class Size;
  18 }
  19
  20 // Per-tab class to help manage metro pinning.
  21 class 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       int32 page_id,
  37       const std::vector<content::FaviconURL>& candidates) OVERRIDE;
  38
  39  private:
  40   // The FaviconDownloader class handles downloading the favicons when a page
  41   // is being pinned. After it has downloaded any available favicons it will
  42   // continue on with the page pinning action.
  43   class FaviconChooser;
  44
  45   explicit MetroPinTabHelper(content::WebContents* web_contents);
  46   friend class content::WebContentsUserData<MetroPinTabHelper>;
  47
  48   // Favicon download callback.
  49   void DidDownloadFavicon(int id,
  50                           int http_status_code,
  51                           const GURL& image_url,
  52                           const std::vector<SkBitmap>& bitmaps,
  53                           const std::vector<gfx::Size>& original_bitmap_sizes);
  54
  55   void UnPinPageFromStartScreen();
  56
  57   // Called by the |favicon_chooser_| when it has finished.
  58   void FaviconDownloaderFinished();
  59
  60   // Candidate Favicon URLs for the current page.
  61   std::vector<content::FaviconURL> favicon_url_candidates_;
  62
  63   // The currently active FaviconChooser, if there is one.
  64   scoped_ptr<FaviconChooser> favicon_chooser_;
  65
  66
  67   DISALLOW_COPY_AND_ASSIGN(MetroPinTabHelper);
  68 };
  69
  70 #endif  // CHROME_BROWSER_UI_METRO_PIN_TAB_HELPER_WIN_H_