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	slackline_emacs.c - lchat - A line oriented chat front end for ii.
	git clone git://git.suckless.org/lchat
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	slackline_emacs.c (1866B)
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	1 /*
	2 * Copyright (c) 2022-2023 Tom Schwindl <[email protected]>
	3 *
	4 * Permission to use, copy, modify, and distribute this software for any
	5 * purpose with or without fee is hereby granted, provided that the above
	6 * copyright notice and this permission notice appear in all copies.
	7 *
	8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANT…
	9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE F…
	11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT …
	14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	15 */
	16
	17 #include <stdio.h>
	18 #include <ctype.h>
	19 #include <stddef.h>
	20 #include <stdlib.h>
	21
	22 #include "slackline.h"
	23 #include "slackline_internals.h"
	24
	25 void
	26 sl_emacs(struct slackline *sl, int key)
	27 {
	28 char tmp;
	29
	30 switch (key) {
	31 case ESC_KEY:
	32 sl->esc = ESC;
	33 break;
	34 case CTRL_A: /* start of line */
	35 sl_move(sl, HOME);
	36 break;
	37 case CTRL_B: /* previous char */
	38 sl_move(sl, LEFT);
	39 break;
	40 case CTRL_D: /* delete char in front of the cursor or exi…
	41 if (sl->rcur < sl->rlen) {
	42 sl_move(sl, RIGHT);
	43 sl_backspace(sl);
	44 } else {
	45 exit(EXIT_SUCCESS);
	46 }
	47 break;
	48 case CTRL_E: /* end of line */
	49 sl_move(sl, END);
	50 break;
	51 case CTRL_F: /* next char */
	52 sl_move(sl, RIGHT);
	53 break;
	54 case CTRL_K: /* delete line from cursor to end */
	55 for (int i = sl->rlen - sl->rcur; i > 0; --i) {
	56 sl_move(sl, RIGHT);
	57 sl_backspace(sl);
	58 }
	59 break;
	60 case CTRL_T: /* swap last two chars */
	61 if (sl->rcur >= 2) {
	62 tmp = *sl_postoptr(sl, sl->rcur-1);
	63 sl->buf[sl->rcur-1] = *sl_postoptr(sl, sl->rcur-…
	64 sl->buf[sl->rcur-2] = tmp;
	65 }
	66 break;
	67 default:
	68 break;
	69 }
	70 }