electron/shell/browser/notifications/win/win32_desktop_notifications/common.h
2019-06-19 17:33:28 -07:00

68 lines
1.7 KiB
C++

// Copyright (c) 2015 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.
#ifndef ATOM_BROWSER_NOTIFICATIONS_WIN_WIN32_DESKTOP_NOTIFICATIONS_COMMON_H_
#define ATOM_BROWSER_NOTIFICATIONS_WIN_WIN32_DESKTOP_NOTIFICATIONS_COMMON_H_
#include <Windows.h>
namespace atom {
struct NotificationData {
DesktopNotificationController* controller = nullptr;
std::wstring caption;
std::wstring body_text;
HBITMAP image = NULL;
NotificationData() = default;
~NotificationData() {
if (image)
DeleteObject(image);
}
NotificationData(const NotificationData& other) = delete;
NotificationData& operator=(const NotificationData& other) = delete;
};
template <typename T>
constexpr T ScaleForDpi(T value, unsigned dpi, unsigned source_dpi = 96) {
return value * dpi / source_dpi;
}
struct ScreenMetrics {
UINT dpi_x, dpi_y;
ScreenMetrics() {
typedef HRESULT WINAPI GetDpiForMonitor_t(HMONITOR, int, UINT*, UINT*);
auto GetDpiForMonitor = reinterpret_cast<GetDpiForMonitor_t*>(
GetProcAddress(GetModuleHandle(TEXT("shcore")), "GetDpiForMonitor"));
if (GetDpiForMonitor) {
auto* monitor = MonitorFromPoint({}, MONITOR_DEFAULTTOPRIMARY);
if (GetDpiForMonitor(monitor, 0, &dpi_x, &dpi_y) == S_OK)
return;
}
HDC hdc = GetDC(NULL);
dpi_x = GetDeviceCaps(hdc, LOGPIXELSX);
dpi_y = GetDeviceCaps(hdc, LOGPIXELSY);
ReleaseDC(NULL, hdc);
}
template <class T>
T X(T value) const {
return ScaleForDpi(value, dpi_x);
}
template <class T>
T Y(T value) const {
return ScaleForDpi(value, dpi_y);
}
};
} // namespace atom
#endif // ATOM_BROWSER_NOTIFICATIONS_WIN_WIN32_DESKTOP_NOTIFICATIONS_COMMON_H_