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