[FancyZones] Zone indexes type change (#12724)

src/modules/fancyzones/FancyZonesLib/FancyZonesWindowProperties.h

@@ -0,0 +1,46 @@
+#pragma once
+
+#include <vector>
+
+#include <FancyZonesLib/Zone.h>
+
+// Zoned window properties are not localized.
+namespace ZonedWindowProperties
+{
+    const wchar_t PropertyMultipleZoneID[] = L"FancyZones_zones";
+    const wchar_t PropertyRestoreSizeID[] = L"FancyZones_RestoreSize";
+    const wchar_t PropertyRestoreOriginID[] = L"FancyZones_RestoreOrigin";
+
+    const wchar_t MultiMonitorDeviceID[] = L"FancyZones#MultiMonitorDevice";
+}
+
+inline ZoneIndexSet GetZoneIndexSet(HWND window)
+{
+    HANDLE handle = ::GetProp(window, ZonedWindowProperties::PropertyMultipleZoneID);
+    ZoneIndexSet zoneIndexSet;
+
+    std::array<int, 2> data;
+    memcpy(data.data(), &handle, sizeof data);
+    uint64_t bitmask = ((uint64_t)data[0] << 32) + data[1];
+    
+    if (bitmask != 0)
+    {
+        for (int i = 0; i < std::numeric_limits<ZoneIndex>::digits; i++)
+        {
+            if ((1ull << i) & bitmask)
+            {
+                zoneIndexSet.push_back(i);
+            }
+        }
+    }
+
+    return zoneIndexSet;
+}
+
+inline void StampWindow(HWND window, Bitmask bitmask) noexcept
+{
+    std::array<int, 2> data = { (bitmask >> 32), static_cast<int>(bitmask) };
+    HANDLE rawData;
+    memcpy(&rawData, data.data(), sizeof data);
+    SetProp(window, ZonedWindowProperties::PropertyMultipleZoneID, rawData);
+}