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/geometry/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   ~WorkspaceLayoutManager() override;
  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   void OnWindowResized() override {}
  63   void OnWindowAddedToLayout(aura::Window* child) override;
  64   void OnWillRemoveWindowFromLayout(aura::Window* child) override;
  65   void OnWindowRemovedFromLayout(aura::Window* child) override;
  66   void OnChildWindowVisibilityChanged(aura::Window* child,
  67                                       bool visibile) override;
  68   void SetChildBounds(aura::Window* child,
  69                       const gfx::Rect& requested_bounds) override;
  70
  71   // ash::ShellObserver overrides:
  72   void OnDisplayWorkAreaInsetsChanged() override;
  73   void OnFullscreenStateChanged(bool is_fullscreen,
  74                                 aura::Window* root_window) override;
  75
  76   // Overriden from WindowObserver:
  77   void OnWindowHierarchyChanged(
  78       const WindowObserver::HierarchyChangeParams& params) override;
  79   void OnWindowPropertyChanged(aura::Window* window,
  80                                const void* key,
  81                                intptr_t old) override;
  82   void OnWindowStackingChanged(aura::Window* window) override;
  83   void OnWindowDestroying(aura::Window* window) override;
  84   void OnWindowBoundsChanged(aura::Window* window,
  85                              const gfx::Rect& old_bounds,
  86                              const gfx::Rect& new_bounds) override;
  87
  88   // aura::client::ActivationChangeObserver overrides:
  89   void OnWindowActivated(
  90       aura::client::ActivationChangeObserver::ActivationReason reason,
  91       aura::Window* gained_active,
  92       aura::Window* lost_active) override;
  93
  94   // keyboard::KeyboardControllerObserver overrides:
  95   void OnKeyboardBoundsChanging(const gfx::Rect& new_bounds) override;
  96
  97   // WindowStateObserver overrides:
  98   void OnPostWindowStateTypeChange(wm::WindowState* window_state,
  99                                    wm::WindowStateType old_type) override;
 100
 101  private:
 102   typedef std::set<aura::Window*> WindowSet;
 103
 104   // Adjusts the bounds of all managed windows when the display area changes.
 105   // This happens when the display size, work area insets has changed.
 106   // If this is called for a display size change (i.e. |event|
 107   // is DISPLAY_RESIZED), the non-maximized/non-fullscreen
 108   // windows are readjusted to make sure the window is completely within the
 109   // display region. Otherwise, it makes sure at least some parts of the window
 110   // is on display.
 111   void AdjustAllWindowsBoundsForWorkAreaChange(const wm::WMEvent* event);
 112
 113   // Updates the visibility state of the shelf.
 114   void UpdateShelfVisibility();
 115
 116   // Updates the fullscreen state of the workspace and notifies Shell if it
 117   // has changed.
 118   void UpdateFullscreenState();
 119
 120   // Updates the bounds of the window for a stte type change from
 121   // |old_show_type|.
 122   void UpdateBoundsFromStateType(wm::WindowState* window_state,
 123                                  wm::WindowStateType old_state_type);
 124
 125   // If |window_state| is maximized or fullscreen the bounds of the
 126   // window are set and true is returned. Does nothing otherwise.
 127   bool SetMaximizedOrFullscreenBounds(wm::WindowState* window_state);
 128
 129   // Animates the window bounds to |bounds|.
 130   void SetChildBoundsAnimated(aura::Window* child, const gfx::Rect& bounds);
 131
 132   ShelfLayoutManager* shelf_;
 133   aura::Window* window_;
 134   aura::Window* root_window_;
 135
 136   // Set of windows we're listening to.
 137   WindowSet windows_;
 138
 139   // The work area in the coordinates of |window_|.
 140   gfx::Rect work_area_in_parent_;
 141
 142   // True if this workspace is currently in fullscreen mode.
 143   bool is_fullscreen_;
 144
 145   // A window which covers the full container and which gets inserted behind the
 146   // topmost visible window.
 147   scoped_ptr<WorkspaceLayoutManagerDelegate> backdrop_delegate_;
 148
 149   DISALLOW_COPY_AND_ASSIGN(WorkspaceLayoutManager);
 150 };
 151
 152 }  // namespace ash
 153
 154 #endif  // ASH_WM_WORKSPACE_WORKSPACE_LAYOUT_MANAGER_H_