1 files changed, 125 insertions, 0 deletions
diff --git a/x11vnc/xkb_bell.c b/x11vnc/xkb_bell.c
new file mode 100644
index 0000000..2476390
--- /dev/null
+++ b/x11vnc/xkb_bell.c
@@ -0,0 +1,125 @@
+/* -- xkb_bell.c -- */
+
+#include "x11vnc.h"
+#include "xwrappers.h"
+#include "connections.h"
+
+/*
+ * Bell event handling.  Requires XKEYBOARD extension.
+ */
+int xkb_base_event_type = 0;
+
+void initialize_xkb(void);
+void initialize_watch_bell(void);
+void check_bell_event(void);
+
+
+#if LIBVNCSERVER_HAVE_XKEYBOARD
+
+/*
+ * check for XKEYBOARD, set up xkb_base_event_type
+ */
+void initialize_xkb(void) {
+	int ir, reason;
+	int op, ev, er, maj, min;
+	
+	if (xkbcompat) {
+		xkb_present = 0;
+	} else if (! XkbQueryExtension(dpy, &op, &ev, &er, &maj, &min)) {
+		if (! quiet) {
+			rfbLog("warning: XKEYBOARD extension not present.\n");
+		}
+		xkb_present = 0;
+	} else {
+		xkb_present = 1;
+	}
+
+	if (! xkb_present) {
+		return;
+	}
+
+	if (! XkbOpenDisplay(DisplayString(dpy), &xkb_base_event_type, &ir,
+	    NULL, NULL, &reason) ) {
+		if (! quiet) {
+			rfbLog("warning: disabling XKEYBOARD. XkbOpenDisplay"
+			    " failed.\n");
+		}
+		xkb_base_event_type = 0;
+		xkb_present = 0;
+	}
+}
+
+void initialize_watch_bell(void) {
+	if (! xkb_present) {
+		if (! quiet) {
+			rfbLog("warning: disabling bell. XKEYBOARD ext. "
+			    "not present.\n");
+		}
+		watch_bell = 0;
+		sound_bell = 0;
+		return;
+	}
+
+	XkbSelectEvents(dpy, XkbUseCoreKbd, XkbBellNotifyMask, 0);
+
+	if (! watch_bell) {
+		return;
+	}
+	if (! XkbSelectEvents(dpy, XkbUseCoreKbd, XkbBellNotifyMask,
+	    XkbBellNotifyMask) ) {
+		if (! quiet) {
+			rfbLog("warning: disabling bell. XkbSelectEvents"
+			    " failed.\n");
+		}
+		watch_bell = 0;
+		sound_bell = 0;
+	}
+}
+
+/*
+ * We call this periodically to process any bell events that have 
+ * taken place.
+ */
+void check_bell_event(void) {
+	XEvent xev;
+	XkbAnyEvent *xkb_ev;
+	int got_bell = 0;
+
+	if (! xkb_base_event_type) {
+		return;
+	}
+
+	/* caller does X_LOCK */
+	if (! XCheckTypedEvent(dpy, xkb_base_event_type, &xev)) {
+		return;
+	}
+	if (! watch_bell) {
+		/* we return here to avoid xkb events piling up */
+		return;
+	}
+
+	xkb_ev = (XkbAnyEvent *) &xev;
+	if (xkb_ev->xkb_type == XkbBellNotify) {
+		got_bell = 1;
+	}
+
+	if (got_bell && sound_bell) {
+		if (! all_clients_initialized()) {
+			rfbLog("check_bell_event: not sending bell: "
+			    "uninitialized clients\n");
+		} else {
+			if (screen && client_count) {
+				rfbSendBell(screen);
+			}
+		}
+	}
+}
+#else
+void initialize_watch_bell(void) {
+	watch_bell = 0;
+	sound_bell = 0;
+}
+void check_bell_event(void) {}
+#endif
+
+