1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
|
// 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.
#include "ui/gfx/screen_win.h"
#include <windows.h>
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "ui/gfx/display.h"
#include "ui/gfx/geometry/point.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/win/display_info.h"
#include "ui/gfx/win/dpi.h"
#include "ui/gfx/win/screen_win_display.h"
namespace {
std::vector<gfx::win::ScreenWinDisplay> DisplayInfosToScreenWinDisplays(
const std::vector<gfx::win::DisplayInfo>& display_infos) {
std::vector<gfx::win::ScreenWinDisplay> screen_win_displays;
for (const auto& display_info : display_infos)
screen_win_displays.push_back(gfx::win::ScreenWinDisplay(display_info));
return screen_win_displays;
}
std::vector<gfx::Display> ScreenWinDisplaysToDisplays(
const std::vector<gfx::win::ScreenWinDisplay>& screen_win_displays) {
std::vector<gfx::Display> displays;
for (const auto& screen_win_display : screen_win_displays)
displays.push_back(screen_win_display.display());
return displays;
}
MONITORINFOEX MonitorInfoFromHMONITOR(HMONITOR monitor) {
MONITORINFOEX monitor_info;
::ZeroMemory(&monitor_info, sizeof(monitor_info));
monitor_info.cbSize = sizeof(monitor_info);
::GetMonitorInfo(monitor, &monitor_info);
return monitor_info;
}
BOOL CALLBACK EnumMonitorCallback(HMONITOR monitor,
HDC hdc,
LPRECT rect,
LPARAM data) {
std::vector<gfx::win::DisplayInfo>* display_infos =
reinterpret_cast<std::vector<gfx::win::DisplayInfo>*>(data);
DCHECK(display_infos);
display_infos->push_back(
gfx::win::DisplayInfo(MonitorInfoFromHMONITOR(monitor),
gfx::GetDPIScale()));
return TRUE;
}
std::vector<gfx::win::DisplayInfo> GetDisplayInfosFromSystem() {
std::vector<gfx::win::DisplayInfo> display_infos;
EnumDisplayMonitors(nullptr, nullptr, EnumMonitorCallback,
reinterpret_cast<LPARAM>(&display_infos));
DCHECK_EQ(static_cast<size_t>(::GetSystemMetrics(SM_CMONITORS)),
display_infos.size());
return display_infos;
}
} // namespace
namespace gfx {
ScreenWin::ScreenWin() {
Initialize();
}
ScreenWin::~ScreenWin() = default;
HWND ScreenWin::GetHWNDFromNativeView(NativeView window) const {
NOTREACHED();
return nullptr;
}
NativeWindow ScreenWin::GetNativeWindowFromHWND(HWND hwnd) const {
NOTREACHED();
return nullptr;
}
gfx::Point ScreenWin::GetCursorScreenPoint() {
POINT pt;
::GetCursorPos(&pt);
gfx::Point cursor_pos_pixels(pt);
return gfx::win::ScreenToDIPPoint(cursor_pos_pixels);
}
gfx::NativeWindow ScreenWin::GetWindowUnderCursor() {
POINT cursor_loc;
HWND hwnd =
::GetCursorPos(&cursor_loc) ? ::WindowFromPoint(cursor_loc) : nullptr;
return GetNativeWindowFromHWND(hwnd);
}
gfx::NativeWindow ScreenWin::GetWindowAtScreenPoint(const gfx::Point& point) {
gfx::Point point_in_pixels = gfx::win::DIPToScreenPoint(point);
return GetNativeWindowFromHWND(WindowFromPoint(point_in_pixels.ToPOINT()));
}
int ScreenWin::GetNumDisplays() const {
return static_cast<int>(screen_win_displays_.size());
}
std::vector<gfx::Display> ScreenWin::GetAllDisplays() const {
return ScreenWinDisplaysToDisplays(screen_win_displays_);
}
gfx::Display ScreenWin::GetDisplayNearestWindow(gfx::NativeView window) const {
HWND window_hwnd = GetHWNDFromNativeView(window);
if (!window_hwnd) {
// When |window| isn't rooted to a display, we should just return the
// default display so we get some correct display information like the
// scaling factor.
return GetPrimaryDisplay();
}
gfx::win::ScreenWinDisplay screen_win_display =
GetScreenWinDisplayNearestHWND(window_hwnd);
return screen_win_display.display();
}
gfx::Display ScreenWin::GetDisplayNearestPoint(const gfx::Point& point) const {
gfx::Point screen_point(gfx::win::DIPToScreenPoint(point));
gfx::win::ScreenWinDisplay screen_win_display =
GetScreenWinDisplayNearestScreenPoint(screen_point);
return screen_win_display.display();
}
gfx::Display ScreenWin::GetDisplayMatching(const gfx::Rect& match_rect) const {
gfx::win::ScreenWinDisplay screen_win_display =
GetScreenWinDisplayNearestScreenRect(match_rect);
return screen_win_display.display();
}
gfx::Display ScreenWin::GetPrimaryDisplay() const {
return GetPrimaryScreenWinDisplay().display();
}
void ScreenWin::AddObserver(DisplayObserver* observer) {
change_notifier_.AddObserver(observer);
}
void ScreenWin::RemoveObserver(DisplayObserver* observer) {
change_notifier_.RemoveObserver(observer);
}
void ScreenWin::UpdateFromDisplayInfos(
const std::vector<gfx::win::DisplayInfo>& display_infos) {
screen_win_displays_ = DisplayInfosToScreenWinDisplays(display_infos);
}
void ScreenWin::Initialize() {
singleton_hwnd_observer_.reset(
new gfx::SingletonHwndObserver(
base::Bind(&ScreenWin::OnWndProc, base::Unretained(this))));
UpdateFromDisplayInfos(GetDisplayInfosFromSystem());
}
MONITORINFOEX ScreenWin::MonitorInfoFromScreenPoint(
const gfx::Point& screen_point) const {
POINT initial_loc = { screen_point.x(), screen_point.y() };
return MonitorInfoFromHMONITOR(::MonitorFromPoint(initial_loc,
MONITOR_DEFAULTTONEAREST));
}
MONITORINFOEX ScreenWin::MonitorInfoFromScreenRect(const gfx::Rect& screen_rect)
const {
RECT win_rect = screen_rect.ToRECT();
return MonitorInfoFromHMONITOR(::MonitorFromRect(&win_rect,
MONITOR_DEFAULTTONEAREST));
}
MONITORINFOEX ScreenWin::MonitorInfoFromWindow(HWND hwnd,
DWORD default_options) const {
return MonitorInfoFromHMONITOR(::MonitorFromWindow(hwnd, default_options));
}
HWND ScreenWin::GetRootWindow(HWND hwnd) const {
return ::GetAncestor(hwnd, GA_ROOT);
}
void ScreenWin::OnWndProc(HWND hwnd,
UINT message,
WPARAM wparam,
LPARAM lparam) {
if (message != WM_DISPLAYCHANGE)
return;
std::vector<gfx::Display> old_displays = GetAllDisplays();
UpdateFromDisplayInfos(GetDisplayInfosFromSystem());
change_notifier_.NotifyDisplaysChanged(old_displays, GetAllDisplays());
}
gfx::win::ScreenWinDisplay ScreenWin::GetScreenWinDisplayNearestHWND(HWND hwnd)
const {
return GetScreenWinDisplay(MonitorInfoFromWindow(hwnd,
MONITOR_DEFAULTTONEAREST));
}
gfx::win::ScreenWinDisplay ScreenWin::GetScreenWinDisplayNearestScreenRect(
const Rect& screen_rect) const {
return GetScreenWinDisplay(MonitorInfoFromScreenRect(screen_rect));
}
gfx::win::ScreenWinDisplay ScreenWin::GetScreenWinDisplayNearestScreenPoint(
const Point& screen_point) const {
return GetScreenWinDisplay(MonitorInfoFromScreenPoint(screen_point));
}
gfx::win::ScreenWinDisplay ScreenWin::GetPrimaryScreenWinDisplay() const {
MONITORINFOEX monitor_info = MonitorInfoFromWindow(nullptr,
MONITOR_DEFAULTTOPRIMARY);
gfx::win::ScreenWinDisplay screen_win_display =
GetScreenWinDisplay(monitor_info);
gfx::Display display = screen_win_display.display();
// The Windows primary monitor is defined to have an origin of (0, 0).
DCHECK_EQ(0, display.bounds().origin().x());
DCHECK_EQ(0, display.bounds().origin().y());
return screen_win_display;
}
gfx::win::ScreenWinDisplay ScreenWin::GetScreenWinDisplay(
const MONITORINFOEX& monitor_info) const {
int64_t id =
gfx::win::DisplayInfo::DeviceIdFromDeviceName(monitor_info.szDevice);
for (const auto& screen_win_display : screen_win_displays_) {
if (screen_win_display.display().id() == id)
return screen_win_display;
}
// There is 1:1 correspondence between MONITORINFOEX and ScreenWinDisplay.
// If we make it here, it means we have no displays and we should hand out the
// default display.
DCHECK_EQ(screen_win_displays_.size(), 0u);
return gfx::win::ScreenWinDisplay();
}
} // namespace gfx
|
