chrome/browser/ui/views/frame/global_menu_bar_x11.h

   1 // Copyright 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 CHROME_BROWSER_UI_VIEWS_FRAME_GLOBAL_MENU_BAR_X11_H_
   6 #define CHROME_BROWSER_UI_VIEWS_FRAME_GLOBAL_MENU_BAR_X11_H_
   7
   8 #include <map>
   9 #include <string>
  10
  11 #include "base/compiler_specific.h"
  12 #include "base/prefs/pref_change_registrar.h"
  13 #include "chrome/browser/command_observer.h"
  14 #include "chrome/browser/common/cancelable_request.h"
  15 #include "chrome/browser/history/history_types.h"
  16 #include "chrome/browser/sessions/tab_restore_service.h"
  17 #include "chrome/browser/sessions/tab_restore_service_observer.h"
  18 #include "content/public/browser/notification_observer.h"
  19 #include "content/public/browser/notification_registrar.h"
  20 #include "ui/base/glib/glib_signal.h"
  21 #include "ui/views/widget/desktop_aura/desktop_window_tree_host_observer_x11.h"
  22
  23 typedef struct _DbusmenuMenuitem DbusmenuMenuitem;
  24 typedef struct _DbusmenuServer   DbusmenuServer;
  25
  26 namespace history {
  27 class TopSites;
  28 }
  29
  30 namespace ui {
  31 class Accelerator;
  32 }
  33
  34 class Browser;
  35 class BrowserView;
  36 class Profile;
  37
  38 class BrowserDesktopWindowTreeHostX11;
  39 struct GlobalMenuBarCommand;
  40
  41 // Controls the Mac style menu bar on Unity.
  42 //
  43 // Unity has an Apple-like menu bar at the top of the screen that changes
  44 // depending on the active window. In the GTK port, we had a hidden GtkMenuBar
  45 // object in each GtkWindow which existed only to be scrapped by the
  46 // libdbusmenu-gtk code. Since we don't have GtkWindows anymore, we need to
  47 // interface directly with the lower level libdbusmenu-glib, which we
  48 // opportunistically dlopen() since not everyone is running Ubuntu.
  49 class GlobalMenuBarX11 : public CommandObserver,
  50                          public content::NotificationObserver,
  51                          public TabRestoreServiceObserver,
  52                          public views::DesktopWindowTreeHostObserverX11 {
  53  public:
  54   GlobalMenuBarX11(BrowserView* browser_view,
  55                    BrowserDesktopWindowTreeHostX11* host);
  56   virtual ~GlobalMenuBarX11();
  57
  58   // Creates the object path for DbusemenuServer which is attached to |xid|.
  59   static std::string GetPathForWindow(unsigned long xid);
  60
  61  private:
  62   struct HistoryItem;
  63   typedef std::map<int, DbusmenuMenuitem*> CommandIDMenuItemMap;
  64
  65   // Builds a separator.
  66   DbusmenuMenuitem* BuildSeparator();
  67
  68   // Creates an individual menu item from a title and command, and subscribes
  69   // to the activation signal.
  70   DbusmenuMenuitem* BuildMenuItem(const std::string& label, int tag_id);
  71
  72   // Creates a DbusmenuServer, and attaches all the menu items.
  73   void InitServer(unsigned long xid);
  74
  75   // Stops listening to enable state changed events.
  76   void Disable();
  77
  78   // Creates a whole menu defined with |commands| and titled with the string
  79   // |menu_str_id|. Then appends it to |parent|.
  80   DbusmenuMenuitem* BuildStaticMenu(DbusmenuMenuitem* parent,
  81                                     int menu_str_id,
  82                                     GlobalMenuBarCommand* commands);
  83
  84   // Sets the accelerator for |item|.
  85   void RegisterAccelerator(DbusmenuMenuitem* item,
  86                            const ui::Accelerator& accelerator);
  87
  88   // Creates a HistoryItem from the data in |entry|.
  89   HistoryItem* HistoryItemForTab(const TabRestoreService::Tab& entry);
  90
  91   // Creates a menu item form |item| and inserts it in |menu| at |index|.
  92   void AddHistoryItemToMenu(HistoryItem* item,
  93                             DbusmenuMenuitem* menu,
  94                             int tag,
  95                             int index);
  96
  97   // Sends a message off to History for data.
  98   void GetTopSitesData();
  99
 100   // Callback to receive data requested from GetTopSitesData().
 101   void OnTopSitesReceived(const history::MostVisitedURLList& visited_list);
 102
 103   // Updates the visibility of the bookmark bar on pref changes.
 104   void OnBookmarkBarVisibilityChanged();
 105
 106   // Find the first index of the item in |menu| with the tag |tag_id|.
 107   int GetIndexOfMenuItemWithTag(DbusmenuMenuitem* menu, int tag_id);
 108
 109   // This will remove all menu items in |menu| with |tag| as their tag. This
 110   // clears state about HistoryItems* that we keep to prevent that data from
 111   // going stale. That's why this method recurses into its child menus.
 112   void ClearMenuSection(DbusmenuMenuitem* menu, int tag_id);
 113
 114   // Deleter function for HistoryItem implementation detail.
 115   static void DeleteHistoryItem(void* void_item);
 116
 117   // Overridden from CommandObserver:
 118   virtual void EnabledStateChangedForCommand(int id, bool enabled) OVERRIDE;
 119
 120   // Overridden from content::NotificationObserver:
 121   virtual void Observe(int type,
 122                        const content::NotificationSource& source,
 123                        const content::NotificationDetails& details) OVERRIDE;
 124
 125   // Overridden from TabRestoreServiceObserver:
 126   virtual void TabRestoreServiceChanged(TabRestoreService* service) OVERRIDE;
 127   virtual void TabRestoreServiceDestroyed(TabRestoreService* service) OVERRIDE;
 128
 129   // Overridden from views::DesktopWindowTreeHostObserverX11:
 130   virtual void OnWindowMapped(unsigned long xid) OVERRIDE;
 131   virtual void OnWindowUnmapped(unsigned long xid) OVERRIDE;
 132
 133   CHROMEG_CALLBACK_1(GlobalMenuBarX11, void, OnItemActivated, DbusmenuMenuitem*,
 134                      unsigned int);
 135   CHROMEG_CALLBACK_1(GlobalMenuBarX11, void, OnHistoryItemActivated,
 136                      DbusmenuMenuitem*, unsigned int);
 137   CHROMEG_CALLBACK_0(GlobalMenuBarX11, void, OnHistoryMenuAboutToShow,
 138                      DbusmenuMenuitem*);
 139
 140   Browser* browser_;
 141   Profile* profile_;
 142   BrowserView* browser_view_;
 143   BrowserDesktopWindowTreeHostX11* host_;
 144
 145   // Maps command ids to DbusmenuMenuitems so we can modify their
 146   // enabled/checked state in response to state change notifications.
 147   CommandIDMenuItemMap id_to_menu_item_;
 148
 149   DbusmenuServer* server_;
 150   DbusmenuMenuitem* root_item_;
 151   DbusmenuMenuitem* history_menu_;
 152
 153   // Tracks value of the kShowBookmarkBar preference.
 154   PrefChangeRegistrar pref_change_registrar_;
 155
 156   history::TopSites* top_sites_;
 157
 158   TabRestoreService* tab_restore_service_;  // weak
 159
 160   content::NotificationRegistrar registrar_;
 161
 162   // For callbacks may be run after destruction.
 163   base::WeakPtrFactory<GlobalMenuBarX11> weak_ptr_factory_;
 164
 165   DISALLOW_COPY_AND_ASSIGN(GlobalMenuBarX11);
 166 };
 167
 168 #endif  // CHROME_BROWSER_UI_VIEWS_FRAME_GLOBAL_MENU_BAR_X11_H_