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Add flexible formatting to keyboard_indicators.

Browse source 
Updated for style.
This commit is contained in:
Ian Remmler 2018-06-03 20:02:34 -05:00 committed by Aaron Marcher
parent 005b541717
commit 32e0a2bfcc
2 changed files with 30 additions and 11 deletions
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38
components/keyboard_indicators.c
View file

@ -1,14 +1,26 @@
/* 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))) {
warn("XOpenDisplay: Failed to open display");
@ -17,14 +29,20 @@ keyboard_indicators(void)
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;
}

3
config.def.h
View file

@ -31,7 +31,8 @@ static const char unknown_str[] = "n/a";
* ipv4 IPv4 address interface name (eth0)
* ipv6 IPv6 address interface name (eth0)
* kernel_release `uname -r` NULL
* keyboard_indicators caps/num lock indicators NULL
* keyboard_indicators caps/num lock indicators format string (c?n?)
* see keyboard_indicators.c
* keymap layout (variant) of current NULL
* keymap
* load_avg load average NULL