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      1 // Copyright 2014 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_LOCK_LAYOUT_MANAGER_H_
      6 #define ASH_WM_LOCK_LAYOUT_MANAGER_H_
      7 
      8 #include "ash/ash_export.h"
      9 #include "ash/shell_delegate.h"
     10 #include "ash/wm/wm_types.h"
     11 #include "base/basictypes.h"
     12 #include "base/compiler_specific.h"
     13 #include "base/memory/scoped_ptr.h"
     14 #include "ui/aura/layout_manager.h"
     15 #include "ui/aura/window_observer.h"
     16 #include "ui/gfx/rect.h"
     17 #include "ui/keyboard/keyboard_controller.h"
     18 #include "ui/keyboard/keyboard_controller_observer.h"
     19 
     20 namespace aura {
     21 class RootWindow;
     22 class Window;
     23 }
     24 
     25 namespace ui {
     26 class Layer;
     27 }
     28 
     29 namespace ash {
     30 namespace wm {
     31 class WindowState;
     32 class WMEvent;
     33 }
     34 
     35 // LockLayoutManager is used for the windows created in LockScreenContainer.
     36 // For Chrome OS this includes out-of-box/login/lock/multi-profile login use
     37 // cases. LockScreenContainer does not use default work area definition.
     38 // By default work area is defined as display area minus shelf, docked windows
     39 // and minus virtual keyboard bounds.
     40 // For windows in LockScreenContainer work area is display area minus virtual
     41 // keyboard bounds (only if keyboard overscroll is disabled). If keyboard
     42 // overscroll is enabled then work area always equals to display area size since
     43 // virtual keyboard changes inner workspace of each WebContents.
     44 // For all windows in LockScreenContainer default wm::WindowState is replaced
     45 // with LockWindowState.
     46 class ASH_EXPORT LockLayoutManager
     47     : public aura::LayoutManager,
     48       public aura::WindowObserver,
     49       public VirtualKeyboardStateObserver,
     50       public keyboard::KeyboardControllerObserver {
     51  public:
     52   explicit LockLayoutManager(aura::Window* window);
     53   virtual ~LockLayoutManager();
     54 
     55   // Overridden from aura::LayoutManager:
     56   virtual void OnWindowResized() OVERRIDE;
     57   virtual void OnWindowAddedToLayout(aura::Window* child) OVERRIDE;
     58   virtual void OnWillRemoveWindowFromLayout(aura::Window* child) OVERRIDE;
     59   virtual void OnWindowRemovedFromLayout(aura::Window* child) OVERRIDE;
     60   virtual void OnChildWindowVisibilityChanged(aura::Window* child,
     61                                               bool visibile) OVERRIDE;
     62   virtual void SetChildBounds(aura::Window* child,
     63                               const gfx::Rect& requested_bounds) OVERRIDE;
     64 
     65   // Overriden from aura::WindowObserver:
     66   virtual void OnWindowHierarchyChanged(
     67       const WindowObserver::HierarchyChangeParams& params) OVERRIDE;
     68   virtual void OnWindowPropertyChanged(aura::Window* window,
     69                                        const void* key,
     70                                        intptr_t old) OVERRIDE;
     71   virtual void OnWindowStackingChanged(aura::Window* window) OVERRIDE;
     72   virtual void OnWindowDestroying(aura::Window* window) OVERRIDE;
     73   virtual void OnWindowBoundsChanged(aura::Window* window,
     74                                      const gfx::Rect& old_bounds,
     75                                      const gfx::Rect& new_bounds) OVERRIDE;
     76 
     77   // VirtualKeyboardStateObserver overrides:
     78   virtual void OnVirtualKeyboardStateChanged(bool activated) OVERRIDE;
     79 
     80   // keyboard::KeyboardControllerObserver overrides:
     81   virtual void OnKeyboardBoundsChanging(const gfx::Rect& new_bounds) OVERRIDE;
     82 
     83  private:
     84   // Adjusts the bounds of all managed windows when the display area changes.
     85   // This happens when the display size, work area insets has changed.
     86   void AdjustWindowsForWorkAreaChange(const wm::WMEvent* event);
     87 
     88   aura::Window* window_;
     89   aura::Window* root_window_;
     90 
     91   // True is subscribed as keyboard controller observer.
     92   bool is_observing_keyboard_;
     93 
     94   // The bounds of the keyboard.
     95   gfx::Rect keyboard_bounds_;
     96 
     97   DISALLOW_COPY_AND_ASSIGN(LockLayoutManager);
     98 };
     99 
    100 }  // namespace ash
    101 
    102 #endif  // ASH_WM_LOCK_LAYOUT_MANAGER_H_
    103