forked from adamlaska/electron
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathdark_mode.cc
More file actions
180 lines (150 loc) · 5.48 KB
/
dark_mode.cc
File metadata and controls
180 lines (150 loc) · 5.48 KB
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
// Copyright (c) 2020 Microsoft Inc. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE-CHROMIUM file.
#include "shell/browser/win/dark_mode.h"
#include <dwmapi.h> // DwmSetWindowAttribute()
#include "base/files/file_path.h"
#include "base/scoped_native_library.h"
#include "base/win/pe_image.h"
#include "base/win/win_util.h"
#include "base/win/windows_version.h"
// This namespace contains code originally from
// https://github.com/ysc3839/win32-darkmode/
// governed by the MIT license and (c) Richard Yu
namespace {
// 1903 18362
enum PreferredAppMode { Default, AllowDark, ForceDark, ForceLight, Max };
bool g_darkModeSupported = false;
bool g_darkModeEnabled = false;
DWORD g_buildNumber = 0;
enum WINDOWCOMPOSITIONATTRIB {
WCA_USEDARKMODECOLORS = 26 // build 18875+
};
struct WINDOWCOMPOSITIONATTRIBDATA {
WINDOWCOMPOSITIONATTRIB Attrib;
PVOID pvData;
SIZE_T cbData;
};
using fnSetWindowCompositionAttribute =
BOOL(WINAPI*)(HWND hWnd, WINDOWCOMPOSITIONATTRIBDATA*);
fnSetWindowCompositionAttribute _SetWindowCompositionAttribute = nullptr;
bool IsHighContrast() {
HIGHCONTRASTW highContrast = {sizeof(highContrast)};
if (SystemParametersInfoW(SPI_GETHIGHCONTRAST, sizeof(highContrast),
&highContrast, FALSE))
return highContrast.dwFlags & HCF_HIGHCONTRASTON;
return false;
}
void RefreshTitleBarThemeColor(HWND hWnd, bool dark) {
LONG ldark = dark;
if (g_buildNumber >= 20161) {
// DWMA_USE_IMMERSIVE_DARK_MODE = 20
DwmSetWindowAttribute(hWnd, 20, &ldark, sizeof dark);
return;
}
if (g_buildNumber >= 18363) {
auto data = WINDOWCOMPOSITIONATTRIBDATA{WCA_USEDARKMODECOLORS, &ldark,
sizeof ldark};
_SetWindowCompositionAttribute(hWnd, &data);
return;
}
DwmSetWindowAttribute(hWnd, 0x13, &ldark, sizeof ldark);
}
void InitDarkMode() {
// confirm that we're running on a version of Windows
// where the Dark Mode API is known
auto* os_info = base::win::OSInfo::GetInstance();
g_buildNumber = os_info->version_number().build;
auto const version = os_info->version();
if ((version < base::win::Version::WIN10_RS5) ||
(version > base::win::Version::WIN10_20H1)) {
return;
}
// load "SetWindowCompositionAttribute", used in RefreshTitleBarThemeColor()
_SetWindowCompositionAttribute =
reinterpret_cast<decltype(_SetWindowCompositionAttribute)>(
base::win::GetUser32FunctionPointer("SetWindowCompositionAttribute"));
if (_SetWindowCompositionAttribute == nullptr) {
return;
}
// load the dark mode functions from uxtheme.dll
// * RefreshImmersiveColorPolicyState()
// * ShouldAppsUseDarkMode()
// * AllowDarkModeForApp()
// * SetPreferredAppMode()
// * AllowDarkModeForApp() (build < 18362)
// * SetPreferredAppMode() (build >= 18362)
base::NativeLibrary uxtheme =
base::PinSystemLibrary(FILE_PATH_LITERAL("uxtheme.dll"));
if (!uxtheme) {
return;
}
auto ux_pei = base::win::PEImage(uxtheme);
auto get_ux_proc_from_ordinal = [&ux_pei](int ordinal, auto* setme) {
FARPROC proc = ux_pei.GetProcAddress(reinterpret_cast<LPCSTR>(ordinal));
*setme = reinterpret_cast<decltype(*setme)>(proc);
};
// ordinal 104
using fnRefreshImmersiveColorPolicyState = VOID(WINAPI*)();
fnRefreshImmersiveColorPolicyState _RefreshImmersiveColorPolicyState = {};
get_ux_proc_from_ordinal(104, &_RefreshImmersiveColorPolicyState);
// ordinal 132
using fnShouldAppsUseDarkMode = BOOL(WINAPI*)();
fnShouldAppsUseDarkMode _ShouldAppsUseDarkMode = {};
get_ux_proc_from_ordinal(132, &_ShouldAppsUseDarkMode);
// ordinal 135, in 1809
using fnAllowDarkModeForApp = BOOL(WINAPI*)(BOOL allow);
fnAllowDarkModeForApp _AllowDarkModeForApp = {};
// ordinal 135, in 1903
typedef PreferredAppMode(WINAPI *
fnSetPreferredAppMode)(PreferredAppMode appMode);
fnSetPreferredAppMode _SetPreferredAppMode = {};
if (g_buildNumber < 18362) {
get_ux_proc_from_ordinal(135, &_AllowDarkModeForApp);
} else {
get_ux_proc_from_ordinal(135, &_SetPreferredAppMode);
}
// dark mode is supported iff we found the functions
g_darkModeSupported = _RefreshImmersiveColorPolicyState &&
_ShouldAppsUseDarkMode &&
(_AllowDarkModeForApp || _SetPreferredAppMode);
if (!g_darkModeSupported) {
return;
}
// initial setup: allow dark mode to be used
if (_AllowDarkModeForApp) {
_AllowDarkModeForApp(true);
} else if (_SetPreferredAppMode) {
_SetPreferredAppMode(AllowDark);
}
_RefreshImmersiveColorPolicyState();
// check to see if dark mode is currently enabled
g_darkModeEnabled = _ShouldAppsUseDarkMode() && !IsHighContrast();
}
} // namespace
namespace electron {
void EnsureInitialized() {
static bool initialized = false;
if (!initialized) {
initialized = true;
::InitDarkMode();
}
}
bool IsDarkPreferred(ui::NativeTheme::ThemeSource theme_source) {
switch (theme_source) {
case ui::NativeTheme::ThemeSource::kForcedLight:
return false;
case ui::NativeTheme::ThemeSource::kForcedDark:
return g_darkModeSupported;
case ui::NativeTheme::ThemeSource::kSystem:
return g_darkModeEnabled;
}
}
namespace win {
void SetDarkModeForWindow(HWND hWnd,
ui::NativeTheme::ThemeSource theme_source) {
EnsureInitialized();
RefreshTitleBarThemeColor(hWnd, IsDarkPreferred(theme_source));
}
} // namespace win
} // namespace electron