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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/snap_to_pixel_layout_manager.h"
     11 #include "ash/wm/wm_types.h"
     12 #include "base/basictypes.h"
     13 #include "base/compiler_specific.h"
     14 #include "base/memory/scoped_ptr.h"
     15 #include "ui/aura/layout_manager.h"
     16 #include "ui/aura/window_observer.h"
     17 #include "ui/gfx/rect.h"
     18 #include "ui/keyboard/keyboard_controller.h"
     19 #include "ui/keyboard/keyboard_controller_observer.h"
     20 
     21 namespace aura {
     22 class RootWindow;
     23 class Window;
     24 }
     25 
     26 namespace ui {
     27 class Layer;
     28 }
     29 
     30 namespace ash {
     31 namespace wm {
     32 class WindowState;
     33 class WMEvent;
     34 }
     35 
     36 // LockLayoutManager is used for the windows created in LockScreenContainer.
     37 // For Chrome OS this includes out-of-box/login/lock/multi-profile login use
     38 // cases. LockScreenContainer does not use default work area definition.
     39 // By default work area is defined as display area minus shelf, docked windows
     40 // and minus virtual keyboard bounds.
     41 // For windows in LockScreenContainer work area is display area minus virtual
     42 // keyboard bounds (only if keyboard overscroll is disabled). If keyboard
     43 // overscroll is enabled then work area always equals to display area size since
     44 // virtual keyboard changes inner workspace of each WebContents.
     45 // For all windows in LockScreenContainer default wm::WindowState is replaced
     46 // with LockWindowState.
     47 class ASH_EXPORT LockLayoutManager
     48     : public SnapToPixelLayoutManager,
     49       public aura::WindowObserver,
     50       public VirtualKeyboardStateObserver,
     51       public keyboard::KeyboardControllerObserver {
     52  public:
     53   explicit LockLayoutManager(aura::Window* window);
     54   virtual ~LockLayoutManager();
     55 
     56   // Overridden from aura::LayoutManager:
     57   virtual void OnWindowResized() OVERRIDE;
     58   virtual void OnWindowAddedToLayout(aura::Window* child) OVERRIDE;
     59   virtual void OnWillRemoveWindowFromLayout(aura::Window* child) OVERRIDE;
     60   virtual void OnWindowRemovedFromLayout(aura::Window* child) OVERRIDE;
     61   virtual void OnChildWindowVisibilityChanged(aura::Window* child,
     62                                               bool visibile) OVERRIDE;
     63   virtual void SetChildBounds(aura::Window* child,
     64                               const gfx::Rect& requested_bounds) OVERRIDE;
     65 
     66   // Overriden from aura::WindowObserver:
     67   virtual void OnWindowHierarchyChanged(
     68       const WindowObserver::HierarchyChangeParams& params) OVERRIDE;
     69   virtual void OnWindowPropertyChanged(aura::Window* window,
     70                                        const void* key,
     71                                        intptr_t old) OVERRIDE;
     72   virtual void OnWindowStackingChanged(aura::Window* window) OVERRIDE;
     73   virtual void OnWindowDestroying(aura::Window* window) OVERRIDE;
     74   virtual void OnWindowBoundsChanged(aura::Window* window,
     75                                      const gfx::Rect& old_bounds,
     76                                      const gfx::Rect& new_bounds) OVERRIDE;
     77 
     78   // VirtualKeyboardStateObserver overrides:
     79   virtual void OnVirtualKeyboardStateChanged(bool activated) OVERRIDE;
     80 
     81   // keyboard::KeyboardControllerObserver overrides:
     82   virtual void OnKeyboardBoundsChanging(const gfx::Rect& new_bounds) OVERRIDE;
     83 
     84  private:
     85   // Adjusts the bounds of all managed windows when the display area changes.
     86   // This happens when the display size, work area insets has changed.
     87   void AdjustWindowsForWorkAreaChange(const wm::WMEvent* event);
     88 
     89   aura::Window* window_;
     90   aura::Window* root_window_;
     91 
     92   // True is subscribed as keyboard controller observer.
     93   bool is_observing_keyboard_;
     94 
     95   // The bounds of the keyboard.
     96   gfx::Rect keyboard_bounds_;
     97 
     98   DISALLOW_COPY_AND_ASSIGN(LockLayoutManager);
     99 };
    100 
    101 }  // namespace ash
    102 
    103 #endif  // ASH_WM_LOCK_LAYOUT_MANAGER_H_
    104