(fix landed) Reland of name MaximizeMode to TabletMode

ash/wm/tablet_mode/tablet_mode_window_state.h

+// 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_TABLET_MODE_TABLET_MODE_WINDOW_STATE_H_
+#define ASH_WM_TABLET_MODE_TABLET_MODE_WINDOW_STATE_H_
+
+#include <memory>
+
+#include "ash/wm/window_state.h"
+#include "base/macros.h"
+
+namespace ash {
+class TabletModeWindowManager;
+
+// The TabletModeWindowState 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 TabletModeWindowState : 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.
+  TabletModeWindowState(aura::Window* window, TabletModeWindowManager* creator);
+  ~TabletModeWindowState() override;
+
+  void set_ignore_wm_events(bool ignore) { ignore_wm_events_ = ignore; }
+
+  // Leaves the tablet mode by reverting to previous state object.
+  void LeaveTabletMode(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.
+  std::unique_ptr<wm::WindowState::State> old_state_;
+
+  // The window whose WindowState owns this instance.
+  aura::Window* window_;
+
+  // The creator which needs to be informed when this state goes away.
+  TabletModeWindowManager* 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_;
+
+  // If true, the state will not process events.
+  bool ignore_wm_events_ = false;
+
+  DISALLOW_COPY_AND_ASSIGN(TabletModeWindowState);
+};
+
+}  // namespace ash
+
+#endif  // ASH_WM_TABLET_MODE_TABLET_MODE_WINDOW_STATE_H_