ash/wm/workspace/workspace_layout_manager.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 ASH_WM_WORKSPACE_WORKSPACE_LAYOUT_MANAGER_H_
   6 #define ASH_WM_WORKSPACE_WORKSPACE_LAYOUT_MANAGER_H_
   7
   8 #include <set>
   9
  10 #include "ash/ash_export.h"
  11 #include "ash/shell_observer.h"
  12 #include "ash/wm/window_state_observer.h"
  13 #include "ash/wm/wm_types.h"
  14 #include "base/basictypes.h"
  15 #include "base/compiler_specific.h"
  16 #include "base/memory/scoped_ptr.h"
  17 #include "ui/aura/layout_manager.h"
  18 #include "ui/aura/window_observer.h"
  19 #include "ui/gfx/rect.h"
  20 #include "ui/keyboard/keyboard_controller_observer.h"
  21 #include "ui/wm/public/activation_change_observer.h"
  22
  23 namespace aura {
  24 class RootWindow;
  25 class Window;
  26 }
  27
  28 namespace ui {
  29 class Layer;
  30 }
  31
  32 namespace ash {
  33 class ShelfLayoutManager;
  34 class WorkspaceLayoutManagerDelegate;
  35
  36 namespace wm {
  37 class WindowState;
  38 class WMEvent;
  39 }
  40
  41 // LayoutManager used on the window created for a workspace.
  42 class ASH_EXPORT WorkspaceLayoutManager
  43     : public aura::LayoutManager,
  44       public aura::WindowObserver,
  45       public aura::client::ActivationChangeObserver,
  46       public keyboard::KeyboardControllerObserver,
  47       public ShellObserver,
  48       public wm::WindowStateObserver {
  49  public:
  50   explicit WorkspaceLayoutManager(aura::Window* window);
  51   virtual ~WorkspaceLayoutManager();
  52
  53   void SetShelf(ShelfLayoutManager* shelf);
  54
  55   // A delegate which can be set to add a backdrop behind the top most visible
  56   // window. With the call the ownership of the delegate will be transferred to
  57   // the WorkspaceLayoutManager.
  58   void SetMaximizeBackdropDelegate(
  59       scoped_ptr<WorkspaceLayoutManagerDelegate> delegate);
  60
  61   // Overridden from aura::LayoutManager:
  62   virtual void OnWindowResized() OVERRIDE {}
  63   virtual void OnWindowAddedToLayout(aura::Window* child) OVERRIDE;
  64   virtual void OnWillRemoveWindowFromLayout(aura::Window* child) OVERRIDE;
  65   virtual void OnWindowRemovedFromLayout(aura::Window* child) OVERRIDE;
  66   virtual void OnChildWindowVisibilityChanged(aura::Window* child,
  67                                               bool visibile) OVERRIDE;
  68   virtual void SetChildBounds(aura::Window* child,
  69                               const gfx::Rect& requested_bounds) OVERRIDE;
  70
  71   // ash::ShellObserver overrides:
  72   virtual void OnDisplayWorkAreaInsetsChanged() OVERRIDE;
  73
  74   // Overriden from WindowObserver:
  75   virtual void OnWindowHierarchyChanged(
  76       const WindowObserver::HierarchyChangeParams& params) OVERRIDE;
  77   virtual void OnWindowPropertyChanged(aura::Window* window,
  78                                        const void* key,
  79                                        intptr_t old) OVERRIDE;
  80   virtual void OnWindowStackingChanged(aura::Window* window) OVERRIDE;
  81   virtual void OnWindowDestroying(aura::Window* window) OVERRIDE;
  82   virtual void OnWindowBoundsChanged(aura::Window* window,
  83                                      const gfx::Rect& old_bounds,
  84                                      const gfx::Rect& new_bounds) OVERRIDE;
  85
  86   // aura::client::ActivationChangeObserver overrides:
  87   virtual void OnWindowActivated(aura::Window* gained_active,
  88                                  aura::Window* lost_active) OVERRIDE;
  89
  90   // keyboard::KeyboardControllerObserver overrides:
  91   virtual void OnKeyboardBoundsChanging(const gfx::Rect& new_bounds) OVERRIDE;
  92
  93   // WindowStateObserver overrides:
  94   virtual void OnPostWindowStateTypeChange(
  95       wm::WindowState* window_state,
  96       wm::WindowStateType old_type) OVERRIDE;
  97
  98  private:
  99   typedef std::set<aura::Window*> WindowSet;
 100
 101   // Adjusts the bounds of all managed windows when the display area changes.
 102   // This happens when the display size, work area insets has changed.
 103   // If this is called for a display size change (i.e. |event|
 104   // is DISPLAY_RESIZED), the non-maximized/non-fullscreen
 105   // windows are readjusted to make sure the window is completely within the
 106   // display region. Otherwise, it makes sure at least some parts of the window
 107   // is on display.
 108   void AdjustAllWindowsBoundsForWorkAreaChange(const wm::WMEvent* event);
 109
 110   // Updates the visibility state of the shelf.
 111   void UpdateShelfVisibility();
 112
 113   // Updates the fullscreen state of the workspace and notifies Shell if it
 114   // has changed.
 115   void UpdateFullscreenState();
 116
 117   // Updates the bounds of the window for a stte type change from
 118   // |old_show_type|.
 119   void UpdateBoundsFromStateType(wm::WindowState* window_state,
 120                                  wm::WindowStateType old_state_type);
 121
 122   // If |window_state| is maximized or fullscreen the bounds of the
 123   // window are set and true is returned. Does nothing otherwise.
 124   bool SetMaximizedOrFullscreenBounds(wm::WindowState* window_state);
 125
 126   // Animates the window bounds to |bounds|.
 127   void SetChildBoundsAnimated(aura::Window* child, const gfx::Rect& bounds);
 128
 129   ShelfLayoutManager* shelf_;
 130   aura::Window* window_;
 131   aura::Window* root_window_;
 132
 133   // Set of windows we're listening to.
 134   WindowSet windows_;
 135
 136   // The work area in the coordinates of |window_|.
 137   gfx::Rect work_area_in_parent_;
 138
 139   // True if this workspace is currently in fullscreen mode.
 140   bool is_fullscreen_;
 141
 142   // A window which covers the full container and which gets inserted behind the
 143   // topmost visible window.
 144   scoped_ptr<WorkspaceLayoutManagerDelegate> backdrop_delegate_;
 145
 146   DISALLOW_COPY_AND_ASSIGN(WorkspaceLayoutManager);
 147 };
 148
 149 }  // namespace ash
 150
 151 #endif  // ASH_WM_WORKSPACE_WORKSPACE_LAYOUT_MANAGER_H_