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1 // Copyright 2016 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 UI_GFX_WIN_DISPLAY_MANAGER_H_ | |
6 #define UI_GFX_WIN_DISPLAY_MANAGER_H_ | |
7 | |
8 #include <windows.h> | |
9 #include <memory> | |
10 #include <vector> | |
11 | |
12 #include "base/macros.h" | |
13 #include "base/memory/singleton.h" | |
14 #include "base/observer_list.h" | |
15 #include "ui/gfx/display.h" | |
16 #include "ui/gfx/gfx_export.h" | |
17 | |
18 namespace gfx { | |
19 | |
20 class Point; | |
21 class Rect; | |
22 class SingletonHwndObserver; | |
23 | |
24 namespace win { | |
25 | |
26 class DisplayManagerObserver; | |
27 class DisplayInfo; | |
28 class ScreenWinDisplay; | |
29 | |
30 // Holds all of the ScreenWinDisplays available in the system. | |
31 // Normally, this means there is a 1:1 correspondence between ScreenWinDisplays | |
32 // and HMONITORS. However, in tests, we can't depend on this so we allow | |
33 // overrides of system API functions via virtual calls. | |
34 class GFX_EXPORT DisplayManager { | |
35 public: | |
36 static DisplayManager* GetInstance(); | |
37 | |
38 virtual void Initialize(); | |
39 | |
40 void AddObserver(DisplayManagerObserver* observer); | |
41 void RemoveObserver(DisplayManagerObserver* observer); | |
42 | |
43 const std::vector<ScreenWinDisplay>& GetScreenWinDisplays(); | |
44 | |
45 // Returns the ScreenWinDisplay closest to or enclosing |hwnd|. | |
46 ScreenWinDisplay GetScreenWinDisplayNearestHWND(HWND hwnd) const; | |
47 | |
48 // Returns the ScreenWinDisplay closest to or enclosing |screen_rect|. | |
49 ScreenWinDisplay GetScreenWinDisplayNearestScreenRect( | |
50 const Rect& screen_rect) const; | |
51 | |
52 // Returns the ScreenWinDisplay closest to or enclosing |screen_point|. | |
53 ScreenWinDisplay GetScreenWinDisplayNearestScreenPoint( | |
54 const Point& screen_point) const; | |
55 | |
56 // Returns the ScreenWinDisplay corresponding to the primary monitor. | |
57 ScreenWinDisplay GetPrimaryScreenWinDisplay() const; | |
58 | |
59 // Virtual for the benefit of Unit Tests. | |
oshima
2016/02/01 19:07:37
These are virtual to allow unit tests to mock the
robliao
2016/02/01 21:35:05
Changed to
// Virtual to support mocking by unit t
| |
60 virtual MONITORINFOEX MonitorInfoFromScreenPoint( | |
61 const gfx::Point& screen_point) const; | |
62 virtual MONITORINFOEX MonitorInfoFromScreenRect(const gfx::Rect& screen_rect) | |
63 const; | |
64 virtual MONITORINFOEX MonitorInfoFromWindow(HWND hwnd, DWORD default_options) | |
65 const; | |
66 virtual HWND GetRootWindow(HWND hwnd) const; | |
67 | |
68 protected: | |
69 friend std::default_delete<DisplayManager>; | |
70 | |
71 static void SetInstanceForTesting(scoped_ptr<DisplayManager> display_manager); | |
72 | |
73 DisplayManager(); | |
74 virtual ~DisplayManager(); | |
75 | |
76 void UpdateFromDisplayInfos(const std::vector<DisplayInfo>& display_infos); | |
77 | |
78 private: | |
79 ScreenWinDisplay GetScreenWinDisplay(const MONITORINFOEX& monitor_info) const; | |
80 void WndProc(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam); | |
81 | |
82 scoped_ptr<gfx::SingletonHwndObserver> singleton_hwnd_observer_; | |
83 base::ObserverList<DisplayManagerObserver, true> observer_list_; | |
84 std::vector<ScreenWinDisplay> screen_win_displays_; | |
85 | |
86 DISALLOW_COPY_AND_ASSIGN(DisplayManager); | |
87 }; | |
88 | |
89 } // namespace win | |
90 } // namespace gfx | |
91 | |
92 #endif // UI_GFX_WIN_DISPLAY_MANAGER_H_ | |
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