Move DisplayManager and DisplayChangeObserverX11 from aura to ash.

ui/aura/display_manager.h

-// Copyright (c) 2012 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 UI_AURA_DISPLAY_MANAGER_H_
-#define UI_AURA_DISPLAY_MANAGER_H_
-
-#include <string>
-#include <vector>
-
-#include "base/basictypes.h"
-#include "base/observer_list.h"
-#include "ui/aura/aura_export.h"
-
-namespace gfx {
-class Display;
-class Point;
-class Rect;
-class Size;
-}
-
-namespace aura {
-class DisplayObserver;
-class RootWindow;
-class Window;
-
-// DisplayManager creates, deletes and updates Display objects when
-// display configuration changes, and notifies DisplayObservers about
-// the change. This is owned by Env and its lifetime is longer than
-// any windows.
-class AURA_EXPORT DisplayManager {
- public:
-  static void set_use_fullscreen_host_window(bool use_fullscreen) {
-    use_fullscreen_host_window_ = use_fullscreen;
-  }
-  static bool use_fullscreen_host_window() {
-    return use_fullscreen_host_window_;
-  }
-
-  // Creates a display from string spec. 100+200-1440x800 creates display
-  // whose size is 1440x800 at the location (100, 200) in screen's coordinates.
-  // The location can be omitted and be just "1440x800", which creates
-  // display at the origin of the screen. An empty string creates
-  // the display with default size.
-  //  The device scale factor can be specified by "*", like "1280x780*2",
-  // or will use the value of |gfx::Display::GetForcedDeviceScaleFactor()| if
-  // --force-device-scale-factor is specified.
-  static gfx::Display CreateDisplayFromSpec(const std::string& spec);
-
-  // A utility function to create a root window for primary display.
-  static RootWindow* CreateRootWindowForPrimaryDisplay();
-
-  DisplayManager();
-  virtual ~DisplayManager();
-
-  // Adds/removes DisplayObservers.
-  void AddObserver(DisplayObserver* observer);
-  void RemoveObserver(DisplayObserver* observer);
-
-  // Called when display configuration has changed. The new display
-  // configurations is passed as a vector of Display object, which
-  // contains each display's new infomration.
-  virtual void OnNativeDisplaysChanged(
-      const std::vector<gfx::Display>& display) = 0;
-
-  // Create a root window for given |display|.
-  virtual RootWindow* CreateRootWindowForDisplay(
-      const gfx::Display& display) = 0;
-
-  // Obsoleted: Do not use in new code.
-  // Returns the display at |index|. The display at 0 is
-  // no longer considered "primary".
-  virtual gfx::Display* GetDisplayAt(size_t index) = 0;
-
-  virtual size_t GetNumDisplays() const = 0;
-
-  // Returns the display object nearest given |window|.
-  virtual const gfx::Display& GetDisplayNearestWindow(
-      const Window* window) const = 0;
-
-  // Returns the display object nearest given |point|.
-  virtual const gfx::Display& GetDisplayNearestPoint(
-      const gfx::Point& point) const = 0;
-
-  // Returns the display that most closely intersects |match_rect|.
-  virtual const gfx::Display& GetDisplayMatching(
-      const gfx::Rect& match_rect) const = 0;
-
-  // Returns the human-readable name for the display specified by |display|.
-  virtual std::string GetDisplayNameFor(const gfx::Display& display) = 0;
-
- protected:
-  // Calls observers' OnDisplayBoundsChanged methods.
-  void NotifyBoundsChanged(const gfx::Display& display);
-  void NotifyDisplayAdded(const gfx::Display& display);
-  void NotifyDisplayRemoved(const gfx::Display& display);
-
- private:
-  // If set before the RootWindow is created, the host window will cover the
-  // entire display.  Note that this can still be overridden via the
-  // switches::kAuraHostWindowSize flag.
-  static bool use_fullscreen_host_window_;
-
-  ObserverList<DisplayObserver> observers_;
-  DISALLOW_COPY_AND_ASSIGN(DisplayManager);
-};
-
-}  // namespace aura
-
-#endif  // UI_AURA_DISPLAY_MANAGER_H_