Moves handful of classes in ash/wm/maximize_mode to ash/common

ash/wm/maximize_mode/maximize_mode_window_manager.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_MAXIMIZE_MODE_MAXIMIZE_MODE_WINDOW_MANAGER_H_
-#define ASH_WM_MAXIMIZE_MODE_MAXIMIZE_MODE_WINDOW_MANAGER_H_
-
-#include <stdint.h>
-
-#include <map>
-#include <set>
-
-#include "ash/ash_export.h"
-#include "ash/common/shell_observer.h"
-#include "ash/common/wm/window_state.h"
-#include "ash/common/wm_window_observer.h"
-#include "base/macros.h"
-#include "ui/display/display_observer.h"
-
-namespace ash {
-class MaximizeModeController;
-class MaximizeModeWindowState;
-
-namespace wm {
-class MaximizeModeEventHandler;
-}
-
-// A window manager which - when created - will force all windows into maximized
-// mode. Exception are panels and windows which cannot be maximized.
-// Windows which cannot be maximized / resized are centered with a layer placed
-// behind the window so that no other windows are visible and/or obscured.
-// With the destruction of the manager all windows will be restored to their
-// original state.
-class ASH_EXPORT MaximizeModeWindowManager : public WmWindowObserver,
-                                             public display::DisplayObserver,
-                                             public ShellObserver {
- public:
-  // This should only be deleted by the creator (ash::Shell).
-  ~MaximizeModeWindowManager() override;
-
-  // Returns the number of maximized & tracked windows by this manager.
-  int GetNumberOfManagedWindows();
-
-  // Adds a window which needs to be maximized. This is used by other window
-  // managers for windows which needs to get tracked due to (upcoming) state
-  // changes.
-  // The call gets ignored if the window was already or should not be handled.
-  void AddWindow(WmWindow* window);
-
-  // Called from a window state object when it gets destroyed.
-  void WindowStateDestroyed(WmWindow* window);
-
-  // ShellObserver overrides:
-  void OnOverviewModeStarting() override;
-  void OnOverviewModeEnded() override;
-
-  // Overridden from WindowObserver:
-  void OnWindowDestroying(WmWindow* window) override;
-  void OnWindowTreeChanged(WmWindow* window,
-                           const TreeChangeParams& params) override;
-  void OnWindowPropertyChanged(WmWindow* window,
-                               WmWindowProperty window_property) override;
-  void OnWindowBoundsChanged(WmWindow* window,
-                             const gfx::Rect& old_bounds,
-                             const gfx::Rect& new_bounds) override;
-
-  // display::DisplayObserver overrides:
-  void OnDisplayAdded(const display::Display& display) override;
-  void OnDisplayRemoved(const display::Display& display) override;
-  void OnDisplayMetricsChanged(const display::Display& display,
-                               uint32_t metrics) override;
-
- protected:
-  friend class MaximizeModeController;
-
-  // The object should only be created by the ash::Shell.
-  MaximizeModeWindowManager();
-
- private:
-  using WindowToState = std::map<WmWindow*, MaximizeModeWindowState*>;
-
-  // Maximize all windows and restore their current state.
-  void MaximizeAllWindows();
-
-  // Restore all windows to their previous state.
-  void RestoreAllWindows();
-
-  // Set whether to defer bounds updates on all tracked windows. When set to
-  // false bounds will be updated as they may be stale.
-  void SetDeferBoundsUpdates(bool defer_bounds_updates);
-
-  // If the given window should be handled by us, this function will maximize it
-  // and add it to the list of known windows (remembering the initial show
-  // state).
-  // Note: If the given window cannot be handled by us the function will return
-  // immediately.
-  void MaximizeAndTrackWindow(WmWindow* window);
-
-  // Remove a window from our tracking list.
-  void ForgetWindow(WmWindow* window);
-
-  // Returns true when the given window should be modified in any way by us.
-  bool ShouldHandleWindow(WmWindow* window);
-
-  // Add window creation observers to track creation of new windows.
-  void AddWindowCreationObservers();
-
-  // Remove Window creation observers.
-  void RemoveWindowCreationObservers();
-
-  // Change the internal state (e.g. observers) when the display configuration
-  // changes.
-  void DisplayConfigurationChanged();
-
-  // Returns true when the |window| is a container window.
-  bool IsContainerWindow(WmWindow* window);
-
-  // Add a backdrop behind the currently active window on each desktop.
-  void EnableBackdropBehindTopWindowOnEachDisplay(bool enable);
-
-  // Every window which got touched by our window manager gets added here.
-  WindowToState window_state_map_;
-
-  // All container windows which have to be tracked.
-  std::set<WmWindow*> observed_container_windows_;
-
-  // True if all backdrops are hidden.
-  bool backdrops_hidden_;
-
-  std::unique_ptr<wm::MaximizeModeEventHandler> event_handler_;
-
-  DISALLOW_COPY_AND_ASSIGN(MaximizeModeWindowManager);
-};
-
-}  // namespace ash
-
-#endif  // ASH_WM_MAXIMIZE_MODE_MAXIMIZE_MODE_WINDOW_MANAGER_H_