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Date:: Tue Oct 22 18:40:42 2024 UTC
Message:: handle tab characters tab characters have their width depending on the column they're in, since they extend to the next multiple of 8. (citation needed?) So, keep track of the column when considering the length (in columns) of the text, so that we can render them properly. In the future we might want to turn them into spaces (either at read or render time) just to stay on the safe side in case not all terminals/ncurses implementations use 8 columns.
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 1 de278567 2021-07-21 op /*
 2 de278567 2021-07-21 op  * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
 3 de278567 2021-07-21 op  *
 4 de278567 2021-07-21 op  * Permission to use, copy, modify, and distribute this software for any
 5 de278567 2021-07-21 op  * purpose with or without fee is hereby granted, provided that the above
 6 de278567 2021-07-21 op  * copyright notice and this permission notice appear in all copies.
 7 de278567 2021-07-21 op  *
 8 de278567 2021-07-21 op  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 9 de278567 2021-07-21 op  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 de278567 2021-07-21 op  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 de278567 2021-07-21 op  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 de278567 2021-07-21 op  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 de278567 2021-07-21 op  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 de278567 2021-07-21 op  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 de278567 2021-07-21 op  */
16 de278567 2021-07-21 op 
17 de278567 2021-07-21 op #include "compat.h"
18 de278567 2021-07-21 op 
19 de278567 2021-07-21 op #include <assert.h>
20 de278567 2021-07-21 op #include <stdio.h>
21 de278567 2021-07-21 op #include <stdlib.h>
22 de278567 2021-07-21 op #include <string.h>
23 de278567 2021-07-21 op 
24 cbe2da32 2024-02-06 op #include "cmd.h"
25 f7db6d13 2024-02-06 op #include "keymap.h"
26 de278567 2021-07-21 op #include "telescope.h"
27 de278567 2021-07-21 op #include "ui.h"
28 3d89457c 2024-06-18 thomas.ad #include "xwrapper.h"
29 de278567 2021-07-21 op 
30 408b5181 2021-07-21 op static void	emit_help_item(char *, interactivefn *);
31 408b5181 2021-07-21 op static void	rec_compute_help(struct kmap *, char *, size_t);
32 408b5181 2021-07-21 op 
33 de278567 2021-07-21 op static void
34 408b5181 2021-07-21 op emit_help_item(char *prfx, interactivefn *fn)
35 de278567 2021-07-21 op {
36 de278567 2021-07-21 op 	struct line	*l;
37 de278567 2021-07-21 op 	struct cmd	*cmd;
38 de278567 2021-07-21 op 
39 de278567 2021-07-21 op 	for (cmd = cmds; cmd->cmd != NULL; ++cmd) {
40 de278567 2021-07-21 op 		if (fn == cmd->fn)
41 de278567 2021-07-21 op 			break;
42 de278567 2021-07-21 op 	}
43 de278567 2021-07-21 op 	assert(cmd != NULL);
44 de278567 2021-07-21 op 
45 3d89457c 2024-06-18 thomas.ad 	l = xcalloc(1, sizeof(*l));
46 de278567 2021-07-21 op 
47 c6be26e4 2021-07-21 op 	l->type = LINE_HELP;
48 3d89457c 2024-06-18 thomas.ad 	l->line = xstrdup(prfx);
49 c6be26e4 2021-07-21 op 	l->alt = (char*)cmd->cmd;
50 de278567 2021-07-21 op 
51 c1d27b0e 2024-06-14 op 	TAILQ_INSERT_TAIL(&helpwin.head, l, lines);
52 de278567 2021-07-21 op }
53 de278567 2021-07-21 op 
54 de278567 2021-07-21 op static void
55 de278567 2021-07-21 op rec_compute_help(struct kmap *keymap, char *prfx, size_t len)
56 de278567 2021-07-21 op {
57 de278567 2021-07-21 op 	struct keymap	*k;
58 de278567 2021-07-21 op 	char		 p[32];
59 de278567 2021-07-21 op 	const char	*kn;
60 de278567 2021-07-21 op 
61 de278567 2021-07-21 op 	TAILQ_FOREACH(k, &keymap->m, keymaps) {
62 de278567 2021-07-21 op 		strlcpy(p, prfx, sizeof(p));
63 de278567 2021-07-21 op 		if (*p != '\0')
64 de278567 2021-07-21 op 			strlcat(p, " ", sizeof(p));
65 de278567 2021-07-21 op 		if (k->meta)
66 de278567 2021-07-21 op 			strlcat(p, "M-", sizeof(p));
67 de278567 2021-07-21 op 		if ((kn = unkbd(k->key)) != NULL)
68 de278567 2021-07-21 op 			strlcat(p, kn, sizeof(p));
69 de278567 2021-07-21 op 		else
70 de278567 2021-07-21 op 			strlcat(p, ui_keyname(k->key), sizeof(p));
71 de278567 2021-07-21 op 
72 de278567 2021-07-21 op 		if (k->fn == NULL)
73 de278567 2021-07-21 op 			rec_compute_help(&k->map, p, sizeof(p));
74 de278567 2021-07-21 op 		else
75 de278567 2021-07-21 op 			emit_help_item(p, k->fn);
76 de278567 2021-07-21 op 	}
77 de278567 2021-07-21 op }
78 de278567 2021-07-21 op 
79 de278567 2021-07-21 op void
80 de278567 2021-07-21 op recompute_help(void)
81 de278567 2021-07-21 op {
82 7102f5d9 2021-07-21 op 	static struct kmap *last_active_map = NULL;
83 de278567 2021-07-21 op 	char	p[32] = { 0 };
84 de278567 2021-07-21 op 
85 7102f5d9 2021-07-21 op 	if (last_active_map != current_map) {
86 7102f5d9 2021-07-21 op 		last_active_map = current_map;
87 7102f5d9 2021-07-21 op 
88 c1d27b0e 2024-06-14 op 		helpwin.mode = "*Help*";
89 7102f5d9 2021-07-21 op 		erase_buffer(&helpwin);
90 7102f5d9 2021-07-21 op 		rec_compute_help(current_map, p, sizeof(p));
91 f853ec6f 2024-10-22 op 		wrap_page(&helpwin, help_cols, 0);
92 7102f5d9 2021-07-21 op 	}
93 de278567 2021-07-21 op }