aboutsummaryrefslogtreecommitdiff
path: root/laptop/slstatuso/components/keyboard_indicators.c
diff options
context:
space:
mode:
Diffstat (limited to 'laptop/slstatuso/components/keyboard_indicators.c')
-rwxr-xr-xlaptop/slstatuso/components/keyboard_indicators.c50
1 files changed, 50 insertions, 0 deletions
diff --git a/laptop/slstatuso/components/keyboard_indicators.c b/laptop/slstatuso/components/keyboard_indicators.c
new file mode 100755
index 0000000..5f62bb7
--- /dev/null
+++ b/laptop/slstatuso/components/keyboard_indicators.c
@@ -0,0 +1,50 @@
+/* See LICENSE file for copyright and license details. */
+#include <ctype.h>
+#include <stdio.h>
+#include <string.h>
+#include <X11/Xlib.h>
+
+#include "../slstatus.h"
+#include "../util.h"
+
+/*
+ * fmt consists of uppercase or lowercase 'c' for caps lock and/or 'n' for num
+ * lock, each optionally followed by '?', in the order of indicators desired.
+ * If followed by '?', the letter with case preserved is included in the output
+ * if the corresponding indicator is on. Otherwise, the letter is always
+ * included, lowercase when off and uppercase when on.
+ */
+const char *
+keyboard_indicators(const char *fmt)
+{
+ Display *dpy;
+ XKeyboardState state;
+ size_t fmtlen, i, n;
+ int togglecase, isset;
+ char key;
+
+ if (!(dpy = XOpenDisplay(NULL))) {
+ warn("XOpenDisplay: Failed to open display");
+ return NULL;
+ }
+ XGetKeyboardControl(dpy, &state);
+ XCloseDisplay(dpy);
+
+ fmtlen = strnlen(fmt, 4);
+ for (i = n = 0; i < fmtlen; i++) {
+ key = tolower(fmt[i]);
+ if (key != 'c' && key != 'n')
+ continue;
+
+ togglecase = (i + 1 >= fmtlen || fmt[i + 1] != '?');
+ isset = (state.led_mask & (1 << (key == 'n')));
+
+ if (togglecase)
+ buf[n++] = isset ? toupper(key) : key;
+ else if (isset)
+ buf[n++] = fmt[i];
+ }
+
+ buf[n] = 0;
+ return buf;
+}