60 lines
1.8 KiB
C++
60 lines
1.8 KiB
C++
// Copyright (c) 2022 Microsoft Inc. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE-CHROMIUM file.
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#include "shell/browser/win/dark_mode.h"
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#include <dwmapi.h> // DwmSetWindowAttribute()
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#include "base/win/windows_version.h"
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// This flag works since Win10 20H1 but is not documented until Windows 11
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#define DWMWA_USE_IMMERSIVE_DARK_MODE 20
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// This namespace contains code originally from
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// https://github.com/microsoft/terminal
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// governed by the MIT license and (c) Microsoft Corporation.
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namespace {
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// https://docs.microsoft.com/en-us/windows/win32/api/dwmapi/ne-dwmapi-dwmwindowattribute
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HRESULT TrySetWindowTheme(HWND hWnd, bool dark) {
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const BOOL isDarkMode = dark;
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HRESULT result = DwmSetWindowAttribute(hWnd, DWMWA_USE_IMMERSIVE_DARK_MODE,
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&isDarkMode, sizeof(isDarkMode));
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if (FAILED(result))
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return result;
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auto* os_info = base::win::OSInfo::GetInstance();
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auto const version = os_info->version();
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// Toggle the nonclient area active state to force a redraw (Win10 workaround)
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if (version < base::win::Version::WIN11) {
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HWND activeWindow = GetActiveWindow();
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SendMessage(hWnd, WM_NCACTIVATE, hWnd != activeWindow, 0);
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SendMessage(hWnd, WM_NCACTIVATE, hWnd == activeWindow, 0);
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}
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return S_OK;
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}
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} // namespace
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namespace electron::win {
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bool IsDarkModeSupported() {
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auto* os_info = base::win::OSInfo::GetInstance();
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auto const version = os_info->version();
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return version >= base::win::Version::WIN10_20H1;
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}
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void SetDarkModeForWindow(HWND hWnd) {
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ui::NativeTheme* theme = ui::NativeTheme::GetInstanceForNativeUi();
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bool dark =
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theme->ShouldUseDarkColors() && !theme->UserHasContrastPreference();
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TrySetWindowTheme(hWnd, dark);
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}
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} // namespace electron::win
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