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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_DEFAULT_STATE_H_
      6 #define ASH_WM_DEFAULT_STATE_H_
      7 
      8 #include "ash/wm/window_state.h"
      9 #include "ui/gfx/display.h"
     10 
     11 namespace ash {
     12 namespace wm {
     13 class SetBoundsEvent;
     14 
     15 // DefaultState implements Ash behavior without state machine.
     16 class DefaultState : public WindowState::State {
     17  public:
     18   explicit DefaultState(WindowStateType initial_state_type);
     19   virtual ~DefaultState();
     20 
     21   // WindowState::State overrides:
     22   virtual void OnWMEvent(WindowState* window_state,
     23                          const WMEvent* event) OVERRIDE;
     24   virtual WindowStateType GetType() const OVERRIDE;
     25   virtual void AttachState(WindowState* window_state,
     26                            WindowState::State* previous_state) OVERRIDE;
     27   virtual void DetachState(WindowState* window_state) OVERRIDE;
     28 
     29  private:
     30   // Process state dependent events, such as TOGGLE_MAXIMIZED,
     31   // TOGGLE_FULLSCREEN.
     32   static bool ProcessCompoundEvents(WindowState* window_state,
     33                                     const WMEvent* event);
     34 
     35   // Process workspace related events, such as DISPLAY_BOUNDS_CHANGED.
     36   static bool ProcessWorkspaceEvents(WindowState* window_state,
     37                                      const WMEvent* event);
     38 
     39   // Set the fullscreen/maximized bounds without animation.
     40   static bool SetMaximizedOrFullscreenBounds(wm::WindowState* window_state);
     41 
     42   static void SetBounds(WindowState* window_state,
     43                         const SetBoundsEvent* bounds_event);
     44 
     45   static void CenterWindow(WindowState* window_state);
     46 
     47   // Enters next state. This is used when the state moves from one to another
     48   // within the same desktop mode.
     49   void EnterToNextState(wm::WindowState* window_state,
     50                         wm::WindowStateType next_state_type);
     51 
     52   // Reenters the current state. This is called when migrating from
     53   // previous desktop mode, and the window's state needs to re-construct the
     54   // state/bounds for this state.
     55   void ReenterToCurrentState(wm::WindowState* window_state,
     56                              wm::WindowState::State* state_in_previous_mode);
     57 
     58   // Animates to new window bounds based on the current and previous state type.
     59   void UpdateBoundsFromState(wm::WindowState* window_state,
     60                              wm::WindowStateType old_state_type);
     61 
     62   // The current type of the window.
     63   WindowStateType state_type_;
     64 
     65   // The saved window state for the case that the state gets de-/activated.
     66   gfx::Rect stored_bounds_;
     67   gfx::Rect stored_restore_bounds_;
     68 
     69   // The display state in which the mode got started.
     70   gfx::Display stored_display_state_;
     71 
     72   // The window state only gets remembered for DCHECK reasons.
     73   WindowState* stored_window_state_;
     74 
     75   DISALLOW_COPY_AND_ASSIGN(DefaultState);
     76 };
     77 
     78 }  // namespace wm
     79 }  // namespace ash
     80 
     81 #endif  // ASH_WM_DEFAULT_STATE_H_
     82