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// Copyright 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_UI_TOOLBAR_RECENT_TABS_SUB_MENU_MODEL_H_
#define CHROME_BROWSER_UI_TOOLBAR_RECENT_TABS_SUB_MENU_MODEL_H_
#include <set>
#include "base/memory/weak_ptr.h"
#include "base/task/cancelable_task_tracker.h"
#include "chrome/browser/favicon/favicon_service.h"
#include "chrome/browser/sessions/tab_restore_service.h"
#include "chrome/browser/sessions/tab_restore_service_observer.h"
#include "chrome/browser/sync/glue/synced_session.h"
#include "ui/base/accelerators/accelerator.h"
#include "ui/base/models/simple_menu_model.h"
class Browser;
struct SessionTab;
namespace browser_sync {
class OpenTabsUIDelegate;
}
namespace favicon_base {
struct FaviconImageResult;
}
namespace gfx {
class Image;
}
namespace ui {
class AcceleratorProvider;
}
// A menu model that builds the contents of "Recent tabs" submenu, which include
// the recently closed tabs/windows of current device i.e. local entries, and
// opened tabs of other devices.
class RecentTabsSubMenuModel : public ui::SimpleMenuModel,
public ui::SimpleMenuModel::Delegate,
public TabRestoreServiceObserver {
public:
// Command Id for recently closed items header or disabled item to which the
// accelerator string will be appended.
static const int kRecentlyClosedHeaderCommandId;
static const int kDisabledRecentlyClosedHeaderCommandId;
// Exposed for tests only: return the Command Id for the first entry in the
// recently closed window items list.
static int GetFirstRecentTabsCommandId();
// If |open_tabs_delegate| is NULL, the default delegate for |browser|'s
// profile will be used. Testing may require a specific |open_tabs_delegate|.
RecentTabsSubMenuModel(ui::AcceleratorProvider* accelerator_provider,
Browser* browser,
browser_sync::OpenTabsUIDelegate* open_tabs_delegate);
virtual ~RecentTabsSubMenuModel();
// Overridden from ui::SimpleMenuModel::Delegate:
virtual bool IsCommandIdChecked(int command_id) const OVERRIDE;
virtual bool IsCommandIdEnabled(int command_id) const OVERRIDE;
virtual bool GetAcceleratorForCommandId(
int command_id,
ui::Accelerator* accelerator) OVERRIDE;
virtual void ExecuteCommand(int command_id, int event_flags) OVERRIDE;
virtual const gfx::FontList* GetLabelFontListAt(int index) const OVERRIDE;
int GetMaxWidthForItemAtIndex(int item_index) const;
bool GetURLAndTitleForItemAtIndex(int index,
std::string* url,
base::string16* title);
private:
struct TabNavigationItem;
typedef std::vector<TabNavigationItem> TabNavigationItems;
typedef std::vector<SessionID::id_type> WindowItems;
// Build the menu items by populating the menumodel.
void Build();
// Build the recently closed tabs and windows items.
void BuildLocalEntries();
// Build the tabs items from other devices.
void BuildTabsFromOtherDevices();
// Build a recently closed tab item with parameters needed to restore it, and
// add it to the menumodel at |curr_model_index|.
void BuildLocalTabItem(int seesion_id,
const base::string16& title,
const GURL& url,
int curr_model_index);
// Build the recently closed window item with parameters needed to restore it,
// and add it to the menumodel at |curr_model_index|.
void BuildLocalWindowItem(const SessionID::id_type& window_id,
int num_tabs,
int curr_model_index);
// Build the tab item for other devices with parameters needed to restore it.
void BuildOtherDevicesTabItem(const std::string& session_tag,
const SessionTab& tab);
// Add the favicon for the device section header.
void AddDeviceFavicon(int index_in_menu,
browser_sync::SyncedSession::DeviceType device_type);
// Add the favicon for a local or other devices' tab asynchronously,
// OnFaviconDataAvailable() will be invoked when the favicon is ready.
void AddTabFavicon(int command_id, const GURL& url);
void OnFaviconDataAvailable(
int command_id,
const favicon_base::FaviconImageResult& image_result);
// Clear all recently closed tabs and windows.
void ClearLocalEntries();
// Converts |command_id| of menu item to index in local or other devices'
// TabNavigationItems, and returns the corresponding local or other devices'
// TabNavigationItems in |tab_items|.
int CommandIdToTabVectorIndex(int command_id, TabNavigationItems** tab_items);
// Used to access (and lazily initialize) open_tabs_delegate_.
// TODO(tim): This lazy-init for member variables is error prone because you
// can always skip going through the function and access the field directly.
// Consider instead having code just deal with potentially NULL open_tabs_
// and have it initialized by an event / callback.
browser_sync::OpenTabsUIDelegate* GetOpenTabsUIDelegate();
// Overridden from TabRestoreServiceObserver:
virtual void TabRestoreServiceChanged(TabRestoreService* service) OVERRIDE;
virtual void TabRestoreServiceDestroyed(TabRestoreService* service) OVERRIDE;
Browser* browser_; // Weak.
browser_sync::OpenTabsUIDelegate* open_tabs_delegate_; // Weak.
// Accelerator for reopening last closed tab.
ui::Accelerator reopen_closed_tab_accelerator_;
// Navigation items for local recently closed tabs. The |command_id| for
// these is set to |kFirstLocalTabCommandId| plus the index into the vector.
// Upon invocation of the menu, the navigation information is retrieved from
// |local_tab_navigation_items_| and used to navigate to the item specified.
TabNavigationItems local_tab_navigation_items_;
// Similar to |local_tab_navigation_items_| except the tabs are opened tabs
// from other devices, and the first |command_id| is
// |kFirstOtherDevicesTabCommandId|.
TabNavigationItems other_devices_tab_navigation_items_;
// Window items for local recently closed windows. The |command_id| for
// these is set to |kFirstLocalWindowCommandId| plus the index into the
// vector. Upon invocation of the menu, information is retrieved from
// |local_window_items_| and used to create the specified window.
WindowItems local_window_items_;
// Index of the last local entry (recently closed tab or window) in the
// menumodel.
int last_local_model_index_;
gfx::Image default_favicon_;
base::CancelableTaskTracker local_tab_cancelable_task_tracker_;
base::CancelableTaskTracker other_devices_tab_cancelable_task_tracker_;
base::WeakPtrFactory<RecentTabsSubMenuModel> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(RecentTabsSubMenuModel);
};
#endif // CHROME_BROWSER_UI_TOOLBAR_RECENT_TABS_SUB_MENU_MODEL_H_
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