initial

tmux/powerline/segments/xkb_layout.c

@@ -0,0 +1,64 @@
+/* xkb_layout
+ * Description:
+ * This program will connect to the X Server and print the id of the currently
+ * active keyboard layout.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <X11/XKBlib.h>
+
+#ifdef DEBUG
+	#define DO_DEBUG DEBUG
+#else
+	#define DO_DEBUG 0
+#endif
+#define DEBUG_PRINTF(...) do{ if (DO_DEBUG) { printf(__VA_ARGS__);} } while(0)
+
+int main() {
+	// Get X display
+	char *displayName = "";
+	int eventCode;
+	int errorReturn;
+	int major = XkbMajorVersion;
+	int minor = XkbMinorVersion;;
+	int reasonReturn;
+	Display *_display = XkbOpenDisplay(displayName, &eventCode, &errorReturn,
+			&major, &minor, &reasonReturn);
+	bool error = false;
+	switch (reasonReturn) {
+	case XkbOD_BadLibraryVersion:
+		DEBUG_PRINTF("Bad XKB library version.\n");
+		error = true;
+		break;
+	case XkbOD_ConnectionRefused:
+		DEBUG_PRINTF("Connection to X server refused.\n");
+		error = true;
+		break;
+	case XkbOD_BadServerVersion:
+		DEBUG_PRINTF("Bad X11 server version.\n");
+		error = true;
+		break;
+	case XkbOD_NonXkbServer:
+		DEBUG_PRINTF("XKB not present.\n");
+		error = true;
+		break;
+	case XkbOD_Success:
+		break;
+	}
+
+	if (error) {
+		return EXIT_FAILURE;
+	}
+
+	// Get current state of keyboard.
+	int _deviceId = XkbUseCoreKbd;
+    	XkbStateRec xkbState;
+    	XkbGetState(_display, _deviceId, &xkbState);
+	// print the groupnumber, may be used with setxkbmap -query to get name
+	// of current layout
+	printf("%d\n", xkbState.group);
+	return 0;
+	return EXIT_SUCCESS;
+}