Wallpaper (Windows): add new module

src/detection/wallpaper/wallpaper.h

@@ -0,0 +1,10 @@
+#pragma once
+
+#ifndef FF_INCLUDED_detection_wallpaper
+#define FF_INCLUDED_detection_wallpaper
+
+#include "fastfetch.h"
+
+const char* ffDetectWallpaper(const FFinstance* instance, FFstrbuf* result);
+
+#endif

src/detection/wallpaper/wallpaper_nosupport.c

@@ -0,0 +1,6 @@
+#include "wallpaper.h"
+
+const char* ffDetectWallpaper(FF_MAYBE_UNUSED const FFinstance* instance, FF_MAYBE_UNUSED FFstrbuf* result)
+{
+    return "Not supported on this platform";
+}

src/detection/wallpaper/wallpaper_windows.c

@@ -0,0 +1,14 @@
+#include "wallpaper.h"
+#include "util/windows/registry.h"
+
+const char* ffDetectWallpaper(FF_MAYBE_UNUSED const FFinstance* instance, FFstrbuf* result)
+{
+    FF_HKEY_AUTO_DESTROY hKey = NULL;
+    if(!ffRegOpenKeyForRead(HKEY_CURRENT_USER, L"Control Panel\\Desktop", &hKey, NULL))
+        return "ffRegOpenKeyForRead(Control Panel\\Desktop) failed";
+
+    if(!ffRegReadStrbuf(hKey, L"WallPaper", result, NULL))
+        return "ffRegReadStrbuf(WallPaper) failed";
+
+    return NULL;
+}