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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef ASH_WM_MAXIMIZE_MODE_MAXIMIZE_MODE_WINDOW_STATE_H_
#define ASH_WM_MAXIMIZE_MODE_MAXIMIZE_MODE_WINDOW_STATE_H_
#include "ash/wm/window_state.h"
namespace ash {
class MaximizeModeWindowManager;
// The MaximizeModeWindowState implementation which reduces all possible window
// states to minimized and maximized. If a window cannot be maximized it will be
// set to normal. If a window cannot fill the entire workspace it will be
// centered within the workspace.
class MaximizeModeWindowState : public wm::WindowState::State {
public:
// Called when the window position might need to be updated.
static void UpdateWindowPosition(wm::WindowState* window_state);
// The |window|'s state object will be modified to use this new window mode
// state handler. Upon destruction it will restore the previous state handler
// and call |creator::WindowStateDestroyed()| to inform that the window mode
// was reverted to the old window manager.
MaximizeModeWindowState(aura::Window* window,
MaximizeModeWindowManager* creator);
~MaximizeModeWindowState() override;
// Leaves the maximize mode by reverting to previous state object.
void LeaveMaximizeMode(wm::WindowState* window_state);
// Sets whether to ignore bounds updates. If set to false, immediately does a
// bounds update as the current window bounds may no longer be correct.
void SetDeferBoundsUpdates(bool defer_bounds_updates);
// WindowState::State overrides:
void OnWMEvent(wm::WindowState* window_state,
const wm::WMEvent* event) override;
wm::WindowStateType GetType() const override;
void AttachState(wm::WindowState* window_state,
wm::WindowState::State* previous_state) override;
void DetachState(wm::WindowState* window_state) override;
private:
// Updates the window to |new_state_type| and resulting bounds:
// Either full screen, maximized centered or minimized. If the state does not
// change, only the bounds will be changed. If |animate| is set, the bound
// change get animated.
void UpdateWindow(wm::WindowState* window_state,
wm::WindowStateType new_state_type,
bool animate);
// Depending on the capabilities of the window we either return
// |WINDOW_STATE_TYPE_MAXIMIZED| or |WINDOW_STATE_TYPE_NORMAL|.
wm::WindowStateType GetMaximizedOrCenteredWindowType(
wm::WindowState* window_state);
// Updates the bounds to the maximum possible bounds according to the current
// window state. If |animated| is set we animate the change.
void UpdateBounds(wm::WindowState* window_state, bool animated);
// The original state object of the window.
scoped_ptr<wm::WindowState::State> old_state_;
// The state object for this object which owns this instance.
aura::Window* window_;
// The creator which needs to be informed when this state goes away.
MaximizeModeWindowManager* creator_;
// The current state type. Due to the nature of this state, this can only be
// WM_STATE_TYPE{NORMAL, MINIMIZED, MAXIMIZED}.
wm::WindowStateType current_state_type_;
// If true, do not update bounds.
bool defer_bounds_updates_;
DISALLOW_COPY_AND_ASSIGN(MaximizeModeWindowState);
};
} // namespace ash
#endif // ASH_WM_MAXIMIZE_MODE_MAXIMIZE_MODE_WINDOW_STATE_H_
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