Blob


1 /*
2 * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
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 WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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 OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
17 #include "compat.h"
19 #include <assert.h>
20 #include <stdio.h>
21 #include <stdlib.h>
22 #include <string.h>
24 #include "telescope.h"
25 #include "ui.h"
27 static void emit_help_item(char *, interactivefn *);
28 static void rec_compute_help(struct kmap *, char *, size_t);
30 static void
31 emit_help_item(char *prfx, interactivefn *fn)
32 {
33 struct line *l;
34 struct cmd *cmd;
36 for (cmd = cmds; cmd->cmd != NULL; ++cmd) {
37 if (fn == cmd->fn)
38 break;
39 }
40 assert(cmd != NULL);
42 if ((l = calloc(1, sizeof(*l))) == NULL)
43 abort();
45 l->type = LINE_HELP;
46 l->line = strdup(prfx);
47 l->alt = (char*)cmd->cmd;
49 TAILQ_INSERT_TAIL(&helpwin.page.head, l, lines);
50 }
52 static void
53 rec_compute_help(struct kmap *keymap, char *prfx, size_t len)
54 {
55 struct keymap *k;
56 char p[32];
57 const char *kn;
59 TAILQ_FOREACH(k, &keymap->m, keymaps) {
60 strlcpy(p, prfx, sizeof(p));
61 if (*p != '\0')
62 strlcat(p, " ", sizeof(p));
63 if (k->meta)
64 strlcat(p, "M-", sizeof(p));
65 if ((kn = unkbd(k->key)) != NULL)
66 strlcat(p, kn, sizeof(p));
67 else
68 strlcat(p, ui_keyname(k->key), sizeof(p));
70 if (k->fn == NULL)
71 rec_compute_help(&k->map, p, sizeof(p));
72 else
73 emit_help_item(p, k->fn);
74 }
75 }
77 void
78 recompute_help(void)
79 {
80 static struct kmap *last_active_map = NULL;
81 char p[32] = { 0 };
83 if (last_active_map != current_map) {
84 last_active_map = current_map;
86 helpwin.page.name = "*Help*";
87 erase_buffer(&helpwin);
88 rec_compute_help(current_map, p, sizeof(p));
89 wrap_page(&helpwin, help_cols);
90 }
91 }