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browser_view.h

// Copyright (c) 2010 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_VIEWS_FRAME_BROWSER_VIEW_H_
#define CHROME_BROWSER_VIEWS_FRAME_BROWSER_VIEW_H_

#include <map>
#include <set>
#include <string>
#include <vector>

#include "app/menus/simple_menu_model.h"
#include "base/scoped_ptr.h"
#include "base/timer.h"
#include "build/build_config.h"
#include "chrome/browser/browser.h"
#include "chrome/browser/browser_window.h"
#include "chrome/browser/extensions/image_loading_tracker.h"
#include "chrome/browser/tabs/tab_strip_model.h"
#include "chrome/browser/views/frame/browser_bubble_host.h"
#include "chrome/browser/views/frame/browser_frame.h"
#include "chrome/browser/views/infobars/infobar_container.h"
#include "chrome/browser/views/tabs/tab_strip.h"
#include "chrome/browser/views/tabs/base_tab_strip.h"
#include "chrome/browser/views/unhandled_keyboard_event_handler.h"
#include "gfx/native_widget_types.h"
#include "views/controls/image_view.h"
#include "views/controls/label.h"
#include "views/window/client_view.h"
#include "views/window/window_delegate.h"

#if defined(OS_WIN)
#include "chrome/browser/hang_monitor/hung_plugin_action.h"
#include "chrome/browser/hang_monitor/hung_window_detector.h"
#include "views/controls/menu/native_menu_win.h"
#endif

// NOTE: For more information about the objects and files in this directory,
// view: http://dev.chromium.org/developers/design-documents/browser-window

class AccessibleToolbarView;
class AccessibleViewHelper;
class BookmarkBarView;
class Browser;
class BrowserBubble;
class BrowserViewLayout;
class DownloadShelfView;
class EncodingMenuModel;
class ExtensionShelf;
class FullscreenExitBubble;
class HtmlDialogUIDelegate;
class InfoBarContainer;
class LocationBarView;
class SideTabStrip;
class StatusBubbleViews;
class TabContentsContainer;
class ToolbarView;
class ZoomMenuModel;

#if defined(OS_WIN)
class AeroPeekManager;
class JumpList;
#endif

namespace views {
class ExternalFocusTracker;
class Menu;
class SingleSplitView;
}

///////////////////////////////////////////////////////////////////////////////
// BrowserView
//
//  A ClientView subclass that provides the contents of a browser window,
//  including the TabStrip, toolbars, download shelves, the content area etc.
//
class BrowserView : public BrowserBubbleHost,
                    public BrowserWindow,
                    public BrowserWindowTesting,
                    public NotificationObserver,
                    public TabStripModelObserver,
                    public menus::SimpleMenuModel::Delegate,
                    public views::WindowDelegate,
                    public views::ClientView,
                    public InfoBarContainer::Delegate,
                    public ImageLoadingTracker::Observer {
 public:
  // The browser view's class name.
  static const char kViewClassName[];

  // Explicitly sets how windows are shown. Use a value of -1 to give the
  // default behavior. This is used during testing and not generally useful
  // otherwise.
  static void SetShowState(int state);

  explicit BrowserView(Browser* browser);
  virtual ~BrowserView();

  void set_frame(BrowserFrame* frame) { frame_ = frame; }
  BrowserFrame* frame() const { return frame_; }

  // Returns a pointer to the BrowserView* interface implementation (an
  // instance of this object, typically) for a given native window, or NULL if
  // there is no such association.
  static BrowserView* GetBrowserViewForNativeWindow(gfx::NativeWindow window);

  // Returns a Browser instance of this view.
  Browser* browser() const { return browser_.get(); }

  // Returns the show flag that should be used to show the frame containing
  // this view.
  int GetShowState() const;

  // Called by the frame to notify the BrowserView that it was moved, and that
  // any dependent popup windows should be repositioned.
  void WindowMoved();

  // Called by the frame to notify the BrowserView that a move or resize was
  // initiated.
  void WindowMoveOrResizeStarted();

  // Returns the apparent bounds of the toolbar, in BrowserView coordinates.
  // These differ from |toolbar_.bounds()| in that they match where the toolbar
  // background image is drawn -- slightly outside the "true" bounds
  // horizontally, and, when using vertical tabs, behind the tab column.
  gfx::Rect GetToolbarBounds() const;

  // Returns the bounds of the content area, in the coordinates of the
  // BrowserView's parent.
  gfx::Rect GetClientAreaBounds() const;

  // Returns true if the Find Bar should be rendered such that it appears to
  // blend with the Bookmarks Bar. False if it should appear to blend with the
  // main Toolbar. The return value will vary depending on whether or not the
  // Bookmark Bar is always shown.
  bool ShouldFindBarBlendWithBookmarksBar() const;

  // Returns the constraining bounding box that should be used to lay out the
  // FindBar within. This is _not_ the size of the find bar, just the bounding
  // box it should be laid out within. The coordinate system of the returned
  // rect is in the coordinate system of the frame, since the FindBar is a child
  // window.
  gfx::Rect GetFindBarBoundingBox() const;

  // Returns the preferred height of the TabStrip. Used to position the OTR
  // avatar icon.
  int GetTabStripHeight() const;

  // Takes some view's origin (relative to this BrowserView) and offsets it such
  // that it can be used as the source origin for seamlessly tiling the toolbar
  // background image over that view.
  gfx::Point OffsetPointForToolbarBackgroundImage(
      const gfx::Point& point) const;

  // Accessor for the big icon used with TYPE_EXTENSION_APP, or NULL if this
  // browser isn't TYPE_EXTENSION_APP.
  views::ImageView* extension_app_icon() const { return extension_app_icon_; }

  // Accessor for the big title used with TYPE_EXTENSION_APP, or NULL if this
  // browser isn't TYPE_EXTENSION_APP.
  views::Label* extension_app_title() const { return extension_app_title_; }

  // Accessor for the TabStrip.
  BaseTabStrip* tabstrip() const { return tabstrip_; }

  // Accessor for the Toolbar.
  ToolbarView* toolbar() const { return toolbar_; }

  // Accessor for the ExtensionShelf.
  ExtensionShelf* extension_shelf() const { return extension_shelf_; }

  // Returns true if various window components are visible.
  bool IsTabStripVisible() const;

  // Returns true if the vertical tabstrip is in use.
  bool UseVerticalTabs() const;

  // Returns true if the profile associated with this Browser window is
  // off the record.
  bool IsOffTheRecord() const;

  // Returns true if the non-client view should render the Off-The-Record
  // avatar icon if the window is off the record.
  bool ShouldShowOffTheRecordAvatar() const;

  // Handle the specified |accelerator| being pressed.
  bool AcceleratorPressed(const views::Accelerator& accelerator);

  // Provides the containing frame with the accelerator for the specified
  // command id. This can be used to provide menu item shortcut hints etc.
  // Returns true if an accelerator was found for the specified |cmd_id|, false
  // otherwise.
  bool GetAccelerator(int cmd_id, menus::Accelerator* accelerator);

  // Shows the next app-modal dialog box, if there is one to be shown, or moves
  // an existing showing one to the front. Returns true if one was shown or
  // activated, false if none was shown.
  bool ActivateAppModalDialog() const;

  // Returns the selected TabContents. Used by our NonClientView's
  // TabIconView::TabContentsProvider implementations.
  // TODO(beng): exposing this here is a bit bogus, since it's only used to
  // determine loading state. It'd be nicer if we could change this to be
  // bool IsSelectedTabLoading() const; or something like that. We could even
  // move it to a WindowDelegate subclass.
  TabContents* GetSelectedTabContents() const;

  // Retrieves the icon to use in the frame to indicate an OTR window.
  SkBitmap GetOTRAvatarIcon();

#if defined(OS_WIN)
  // Called right before displaying the system menu to allow the BrowserView
  // to add or delete entries.
  void PrepareToRunSystemMenu(HMENU menu);
#endif

  // Returns true if the Browser object associated with this BrowserView is a
  // normal-type window (i.e. a browser window, not an app or popup).
  bool IsBrowserTypeNormal() const {
    return browser_->type() == Browser::TYPE_NORMAL;
  }

  // Returns true if the Browser object associated with this BrowserView is a
  // app panel window.
  bool IsBrowserTypePanel() const {
    return browser_->type() == Browser::TYPE_APP_PANEL;
  }

  // Returns true if the Browser object associated with this BrowserView is a
  // popup window.
  bool IsBrowserTypePopup() const {
    return (browser_->type() & Browser::TYPE_POPUP) != 0;
  }

  // Register preferences specific to this view.
  static void RegisterBrowserViewPrefs(PrefService* prefs);

  // Returns true if the specified point(BrowserView coordinates) is in
  // in the window caption area of the browser window.
  bool IsPositionInWindowCaption(const gfx::Point& point);

  // Returns whether the fullscreen bubble is visible or not.
  bool IsFullscreenBubbleVisible() const;

  // Invoked from the frame when the full screen state changes. This is only
  // used on Linux.
  void FullScreenStateChanged();

  // Restores the focused view. This is also used to set the initial focus
  // when a new browser window is created.
  void RestoreFocus();

  // Called when the activation of the frame changes.
  virtual void ActivationChanged(bool activated);

  // Overriden from ImageLoadingTracker::Observer.
  virtual void OnImageLoaded(SkBitmap* image, ExtensionResource resource,
                             int index);

  // Overridden from BrowserWindow:
  virtual void Show();
  virtual void SetBounds(const gfx::Rect& bounds);
  virtual void Close();
  virtual void Activate();
  virtual bool IsActive() const;
  virtual void FlashFrame();
  virtual gfx::NativeWindow GetNativeHandle();
  virtual BrowserWindowTesting* GetBrowserWindowTesting();
  virtual StatusBubble* GetStatusBubble();
  virtual void SelectedTabToolbarSizeChanged(bool is_animating);
  virtual void SelectedTabExtensionShelfSizeChanged();
  virtual void UpdateTitleBar();
  virtual void ShelfVisibilityChanged();
  virtual void UpdateDevTools();
  virtual void UpdateLoadingAnimations(bool should_animate);
  virtual void SetStarredState(bool is_starred);
  virtual gfx::Rect GetRestoredBounds() const;
  virtual bool IsMaximized() const;
  virtual void SetFullscreen(bool fullscreen);
  virtual bool IsFullscreen() const;
  virtual LocationBar* GetLocationBar() const;
  virtual void SetFocusToLocationBar(bool select_all);
  virtual void UpdateReloadStopState(bool is_loading, bool force);
  virtual void UpdateToolbar(TabContents* contents, bool should_restore_state);
  virtual void FocusToolbar();
  virtual void FocusAppMenu();
  virtual void FocusBookmarksToolbar();
  virtual void FocusChromeOSStatus() {}
  virtual void RotatePaneFocus(bool forwards);
  virtual void DestroyBrowser();
  virtual bool IsBookmarkBarVisible() const;
  virtual bool IsBookmarkBarAnimating() const;
  virtual bool IsToolbarVisible() const;
  virtual gfx::Rect GetRootWindowResizerRect() const;
  virtual void DisableInactiveFrame();
  virtual void ConfirmAddSearchProvider(const TemplateURL* template_url,
                                      Profile* profile);
  virtual void ToggleBookmarkBar();
  virtual void ToggleExtensionShelf();
  virtual views::Window* ShowAboutChromeDialog();
  virtual void ShowUpdateChromeDialog();
  virtual void ShowTaskManager();
  virtual void ShowBookmarkBubble(const GURL& url, bool already_bookmarked);
  virtual void SetDownloadShelfVisible(bool visible);
  virtual bool IsDownloadShelfVisible() const;
  virtual DownloadShelf* GetDownloadShelf();
  virtual void ShowReportBugDialog();
  virtual void ShowClearBrowsingDataDialog();
  virtual void ShowImportDialog();
  virtual void ShowSearchEnginesDialog();
  virtual void ShowPasswordManager();
  virtual void ShowRepostFormWarningDialog(TabContents* tab_contents);
  virtual void ShowContentSettingsWindow(ContentSettingsType content_type,
                                         Profile* profile);
  virtual void ShowCollectedCookiesDialog(TabContents* tab_contents);
  virtual void ShowProfileErrorDialog(int message_id);
  virtual void ShowThemeInstallBubble();
  virtual void ConfirmBrowserCloseWithPendingDownloads();
  virtual void ShowHTMLDialog(HtmlDialogUIDelegate* delegate,
                              gfx::NativeWindow parent_window);
  virtual void ContinueDraggingDetachedTab(const gfx::Rect& tab_bounds);
  virtual void UserChangedTheme();
  virtual int GetExtraRenderViewHeight() const;
  virtual void TabContentsFocused(TabContents* source);
  virtual void ShowPageInfo(Profile* profile,
                            const GURL& url,
                            const NavigationEntry::SSLStatus& ssl,
                            bool show_history);
  virtual void ShowAppMenu();
  virtual bool PreHandleKeyboardEvent(const NativeWebKeyboardEvent& event,
                                      bool* is_keyboard_shortcut);
  virtual void HandleKeyboardEvent(const NativeWebKeyboardEvent& event);
  virtual void ShowCreateShortcutsDialog(TabContents* tab_contents);
  virtual void Cut();
  virtual void Copy();
  virtual void Paste();
  virtual void ToggleTabStripMode();
  virtual void SetToolbarCollapsedMode(bool val);

  // Overridden from BrowserWindowTesting:
  virtual BookmarkBarView* GetBookmarkBarView() const;
  virtual LocationBarView* GetLocationBarView() const;
  virtual views::View* GetTabContentsContainerView() const;
  virtual ToolbarView* GetToolbarView() const;

  // Overridden from NotificationObserver:
  virtual void Observe(NotificationType type,
                       const NotificationSource& source,
                       const NotificationDetails& details);

  // Overridden from TabStripModelObserver:
  virtual void TabDetachedAt(TabContents* contents, int index);
  virtual void TabDeselectedAt(TabContents* contents, int index);
  virtual void TabSelectedAt(TabContents* old_contents,
                             TabContents* new_contents,
                             int index,
                             bool user_gesture);
  virtual void TabStripEmpty();

  // Overridden from menus::SimpleMenuModel::Delegate:
  virtual bool IsCommandIdChecked(int command_id) const;
  virtual bool IsCommandIdEnabled(int command_id) const;
  virtual bool GetAcceleratorForCommandId(int command_id,
                                          menus::Accelerator* accelerator);
  virtual bool IsLabelForCommandIdDynamic(int command_id) const;
  virtual string16 GetLabelForCommandId(int command_id) const;
  virtual void ExecuteCommand(int command_id);

  // Overridden from views::WindowDelegate:
  virtual bool CanResize() const;
  virtual bool CanMaximize() const;
  virtual bool IsModal() const;
  virtual std::wstring GetWindowTitle() const;
  virtual views::View* GetInitiallyFocusedView();
  virtual bool ShouldShowWindowTitle() const;
  virtual SkBitmap GetWindowAppIcon();
  virtual SkBitmap GetWindowIcon();
  virtual bool ShouldShowWindowIcon() const;
  virtual bool ExecuteWindowsCommand(int command_id);
  virtual std::wstring GetWindowName() const;
  virtual void SaveWindowPlacement(const gfx::Rect& bounds,
                                   bool maximized);
  virtual bool GetSavedWindowBounds(gfx::Rect* bounds) const;
  virtual bool GetSavedMaximizedState(bool* maximized) const;
  virtual views::View* GetContentsView();
  virtual views::ClientView* CreateClientView(views::Window* window);

  // Overridden from views::ClientView:
  virtual bool CanClose() const;
  virtual int NonClientHitTest(const gfx::Point& point);
  virtual gfx::Size GetMinimumSize();

  // InfoBarContainer::Delegate overrides
  virtual void InfoBarSizeChanged(bool is_animating);

 protected:
  // Appends to |toolbars| a pointer to each AccessibleToolbarView that
  // can be traversed using F6, in the order they should be traversed.
  // Abstracted here so that it can be extended for Chrome OS.
  virtual void GetAccessibleToolbars(
      std::vector<AccessibleToolbarView*>* toolbars);

  // Save the current focused view to view storage
  void SaveFocusedView();

  int last_focused_view_storage_id() const {
    return last_focused_view_storage_id_;
  }

  // Overridden from views::View:
  virtual std::string GetClassName() const;
  virtual void Layout();
  virtual void ViewHierarchyChanged(bool is_add,
                                    views::View* parent,
                                    views::View* child);
  virtual void ChildPreferredSizeChanged(View* child);
  virtual bool GetAccessibleRole(AccessibilityTypes::Role* role);

  // Factory Methods.
  // Returns a new LayoutManager for this browser view. A subclass may
  // override to implemnet different layout pocily.
  virtual views::LayoutManager* CreateLayoutManager() const;

  // Initializes a new TabStrip for the browser view. This can be performed
  // multiple times over the life of the browser, and is run when the display
  // mode for the tabstrip changes from horizontal to vertical.
  virtual void InitTabStrip(TabStripModel* tab_strip_model);

  // Browser window related initializations.
  virtual void Init();

 private:
  friend class BrowserViewLayout;

#if defined(OS_WIN)
  // Creates the system menu.
  void InitSystemMenu();
#endif

  // Returns the BrowserViewLayout.
  BrowserViewLayout* GetBrowserViewLayout() const;

  // Layout the Status Bubble.
  void LayoutStatusBubble(int top);

  // Prepare to show the Bookmark Bar for the specified TabContents. Returns
  // true if the Bookmark Bar can be shown (i.e. it's supported for this
  // Browser type) and there should be a subsequent re-layout to show it.
  // |contents| can be NULL.
  bool MaybeShowBookmarkBar(TabContents* contents);

  // Prepare to show an Info Bar for the specified TabContents. Returns true
  // if there is an Info Bar to show and one is supported for this Browser
  // type, and there should be a subsequent re-layout to show it.
  // |contents| can be NULL.
  bool MaybeShowInfoBar(TabContents* contents);

  // Updated devtools window for given contents.
  void UpdateDevToolsForContents(TabContents* tab_contents);

  // Updates various optional child Views, e.g. Bookmarks Bar, Info Bar or the
  // Download Shelf in response to a change notification from the specified
  // |contents|. |contents| can be NULL. In this case, all optional UI will be
  // removed.
  void UpdateUIForContents(TabContents* contents);

  // Updates an optional child View, e.g. Bookmarks Bar, Info Bar, Download
  // Shelf. If |*old_view| differs from new_view, the old_view is removed and
  // the new_view is added. This is intended to be used when swapping in/out
  // child views that are referenced via a field.
  // Returns true if anything was changed, and a re-Layout is now required.
  bool UpdateChildViewAndLayout(views::View* new_view, views::View** old_view);

  // Invoked to update the necessary things when our fullscreen state changes
  // to |fullscreen|. On Windows this is invoked immediately when we toggle the
  // full screen state. On Linux changing the fullscreen state is async, so we
  // ask the window to change it's fullscreen state, then when we get
  // notification that it succeeded this method is invoked.
  void ProcessFullscreen(bool fullscreen);

  // Copy the accelerator table from the app resources into something we can
  // use.
  void LoadAccelerators();

#if defined(OS_WIN)
  // Builds the correct menu for when we have minimal chrome.
  void BuildSystemMenuForBrowserWindow();
  void BuildSystemMenuForAppOrPopupWindow(bool is_app);
#endif

  // Retrieves the command id for the specified Windows app command.
  int GetCommandIDForAppCommandID(int app_command_id) const;

  // Callback for the loading animation(s) associated with this view.
  void LoadingAnimationCallback();

  // Initialize the hung plugin detector.
  void InitHangMonitor();

  // Initialize class statics.
  static void InitClass();

  // Last focused view that issued a tab traversal.
  int last_focused_view_storage_id_;

  // The BrowserFrame that hosts this view.
  BrowserFrame* frame_;

  // The Browser object we are associated with.
  scoped_ptr<Browser> browser_;

  // Tool/Info bars that we are currently showing. Used for layout.
  // active_bookmark_bar_ is either NULL, if the bookmark bar isn't showing,
  // or is bookmark_bar_view_ if the bookmark bar is showing.
  views::View* active_bookmark_bar_;

  // The big icon in the top-left if this browser is TYPE_EXTENSION_APP, or
  // NULL otherwise.
  views::ImageView* extension_app_icon_;

  // The big title text in the top-left if this browser is TYPE_EXTENSION_APP,
  // or NULL otherwise.
  views::Label* extension_app_title_;

  // The TabStrip.
  BaseTabStrip* tabstrip_;

  // The Toolbar containing the navigation buttons, menus and the address bar.
  ToolbarView* toolbar_;

  // The Bookmark Bar View for this window. Lazily created.
  scoped_ptr<BookmarkBarView> bookmark_bar_view_;

  // The download shelf view (view at the bottom of the page).
  scoped_ptr<DownloadShelfView> download_shelf_;

  // The InfoBarContainer that contains InfoBars for the current tab.
  InfoBarContainer* infobar_container_;

  // The view that contains the selected TabContents.
  TabContentsContainer* contents_container_;

  // The view that contains devtools window for the selected TabContents.
  TabContentsContainer* devtools_container_;

  // Split view containing the contents container and devtools container.
  views::SingleSplitView* contents_split_;

  // Tracks and stores the last focused view which is not the
  // devtools_container_ or any of its children. Used to restore focus once
  // the devtools_container_ is hidden.
  scoped_ptr<views::ExternalFocusTracker> devtools_focus_tracker_;

  // The Status information bubble that appears at the bottom of the window.
  scoped_ptr<StatusBubbleViews> status_bubble_;

  // A mapping between accelerators and commands.
  std::map<views::Accelerator, int> accelerator_table_;

  // True if we have already been initialized.
  bool initialized_;

  // True if we should ignore requests to layout.  This is set while toggling
  // fullscreen mode on and off to reduce jankiness.
  bool ignore_layout_;

  scoped_ptr<FullscreenExitBubble> fullscreen_bubble_;

#if defined(OS_WIN)
  // The additional items we insert into the system menu.
  scoped_ptr<views::SystemMenuModel> system_menu_contents_;
  scoped_ptr<ZoomMenuModel> zoom_menu_contents_;
  scoped_ptr<EncodingMenuModel> encoding_menu_contents_;
  // The wrapped system menu itself.
  scoped_ptr<views::NativeMenuWin> system_menu_;

  // This object is used to perform periodic actions in a worker
  // thread. It is currently used to monitor hung plugin windows.
  WorkerThreadTicker ticker_;

  // This object is initialized with the frame window HWND. This
  // object is also passed as a tick handler with the ticker_ object.
  // It is used to periodically monitor for hung plugin windows
  HungWindowDetector hung_window_detector_;

  // This object is invoked by hung_window_detector_ when it detects a hung
  // plugin window.
  HungPluginAction hung_plugin_action_;

  // The custom JumpList for Windows 7.
  scoped_ptr<JumpList> jumplist_;

  // The custom AeroPeek manager for Windows 7.
  scoped_ptr<AeroPeekManager> aeropeek_manager_;
#endif

  // The timer used to update frames for the Loading Animation.
  base::RepeatingTimer<BrowserView> loading_animation_timer_;

  // A bottom bar for showing extensions.
  ExtensionShelf* extension_shelf_;

  UnhandledKeyboardEventHandler unhandled_keyboard_event_handler_;

  scoped_ptr<AccessibleViewHelper> accessible_view_helper_;

  // Loads extension_app_icon_ asynchronously on the file thread.
  ImageLoadingTracker extension_app_icon_loader_;

  DISALLOW_COPY_AND_ASSIGN(BrowserView);
};

#endif  // CHROME_BROWSER_VIEWS_FRAME_BROWSER_VIEW_H_

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