/* See LICENSE file for copyright and license details. */
+#include <ctype.h>
#include <stdio.h>
+#include <string.h>
#include <X11/Xlib.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(void)
+keyboard_indicators(const char *fmt)
{
Display *dpy;
XKeyboardState state;
+ size_t fmtlen, i, n;
+ int togglecase, isset;
+ char key;
if (!(dpy = XOpenDisplay(NULL))) {
- fprintf(stderr, "Cannot open display\n");
+ warn("XOpenDisplay: Failed to open display");
return NULL;
}
XGetKeyboardControl(dpy, &state);
XCloseDisplay(dpy);
- switch (state.led_mask) {
- case 1:
- return "c";
- case 2:
- return "n";
- case 3:
- return "cn";
- default:
- return "";
+ 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;
}