ash/wm/default_state.h

   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_