Added desktop notifications implementation for Windows 7 (and earlier)

brightray/browser/win/win32_desktop_notifications/common.h

@@ -0,0 +1,57 @@
+#pragma once
+#include <Windows.h>
+
+namespace brightray {
+
+struct NotificationData
+{
+    DesktopNotificationController* controller = nullptr;
+
+    std::wstring caption;
+    std::wstring bodyText;
+    HBITMAP image = NULL;
+
+
+    NotificationData() = default;
+
+    ~NotificationData()
+    {
+        if(image) DeleteObject(image);
+    }
+
+    NotificationData(const NotificationData& other) = delete;
+    NotificationData& operator=(const NotificationData& other) = delete;
+};
+
+template<typename T>
+inline T ScaleForDpi(T value, unsigned dpi)
+{
+    return value * dpi / 96;
+}
+
+struct ScreenMetrics
+{
+    UINT dpiX, dpiY;
+
+    ScreenMetrics()
+    {
+        typedef HRESULT WINAPI GetDpiForMonitor_t(HMONITOR, int, UINT*, UINT*);
+        auto GetDpiForMonitor = (GetDpiForMonitor_t*)GetProcAddress(GetModuleHandle(TEXT("shcore")), "GetDpiForMonitor");
+        if(GetDpiForMonitor)
+        {
+            auto monitor = MonitorFromPoint({}, MONITOR_DEFAULTTOPRIMARY);
+            if(GetDpiForMonitor(monitor, 0, &dpiX, &dpiY) == S_OK)
+                return;
+        }
+
+        HDC hdc = GetDC(NULL);
+        dpiX = GetDeviceCaps(hdc, LOGPIXELSX);
+        dpiY = GetDeviceCaps(hdc, LOGPIXELSY);
+        ReleaseDC(NULL, hdc);
+    }
+
+    template<typename T> T X(T value) const { return ScaleForDpi(value, dpiX); }
+    template<typename T> T Y(T value) const { return ScaleForDpi(value, dpiY); }
+};
+
+}