1 files changed, 52 insertions, 0 deletions
diff --git a/windows/window.c b/windows/window.c
new file mode 100644
index 000000000..7fb755d2b
--- /dev/null
+++ b/windows/window.c
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2011 Vincent Sanders <vince@simtec.co.uk>
+ *
+ * This file is part of NetSurf, http://www.netsurf-browser.org/
+ *
+ * NetSurf is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * NetSurf is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdbool.h>
+
+#include <windows.h>
+
+#include "windows/window.h"
+
+/* documented in windows/window.h */
+struct gui_window *
+nsws_get_gui_window(HWND hwnd)
+{
+	struct gui_window *gw = NULL;
+	HWND phwnd = hwnd;
+
+	/* scan the window hierachy for gui window */
+	while (phwnd != NULL) {
+		gw = GetProp(phwnd, TEXT("GuiWnd"));
+		if (gw != NULL)
+			break;
+		phwnd = GetParent(phwnd);
+	}
+
+	if (gw == NULL) {
+		/* try again looking for owner windows instead */
+		phwnd = hwnd;
+		while (phwnd != NULL) {
+			gw = GetProp(phwnd, TEXT("GuiWnd"));
+			if (gw != NULL)
+				break;
+			phwnd = GetWindow(phwnd, GW_OWNER);
+		}
+	}
+
+	return gw;
+}