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  */
16 
17 #include <stdlib.h>
18 
19 #include "compl.h"
20 #include "telescope.h"
21 
22 /*
23  * Provide completions for execute-extended-command (eecmd).
24  */
25 const char *
26 compl_eecmd(void **data, void **ret)
27 {
28 	struct cmd	**state = (struct cmd **)data;
29 
30 	/* first time: init the state */
31 	if (*state == NULL)
32 		*state = cmds;
33 
34 	if ((*state)->cmd == NULL)
35 		return NULL;
36 
37 	return (*state)++->cmd;
38 }
39 
40 /*
41  * Provide completions for tab-select.
42  */
43 const char *
44 compl_ts(void **data, void **ret)
45 {
46 	struct tab	**tab = (struct tab **)data;
47 
48 	/* first time: init the state */
49 	if (*tab == NULL)
50 		*tab = TAILQ_FIRST(&tabshead);
51 	else if ((*tab = TAILQ_NEXT(*tab, tabs)) == NULL)
52 		return NULL;
53 
54 	*ret = *tab;
55 
56 	if (*(*tab)->buffer.page.title == '\0')
57 		return (*tab)->hist_cur->h;
58 	return (*tab)->buffer.page.title;
59 }
60 
61 /*
62  * Provide completions for link-select.
63  */
64 const char *
65 compl_ls(void **data, void **ret)
66 {
67 	struct line	**line = (struct line **)data;
68 	struct line	*l;
69 	const char	*link;
70 
71 	l = *line;
72 	while (l != NULL && l->type != LINE_LINK)
73 		l = TAILQ_NEXT(l, lines);
74 
75 	/* end of buffer */
76 	if (l == NULL)
77 		return NULL;
78 
79 	if ((link = l->line) == NULL)
80 		link = l->alt;
81 
82 	*ret = l;
83 	*line = TAILQ_NEXT(l, lines);
84 	return link;
85 }
86 
87 /*
88  * Provide completions for swiper.
89  */
90 const char *
91 compl_swiper(void **data, void **ret)
92 {
93 	struct line	**line = (struct line **)data;
94 	const char	*text;
95 
96 	while (*line != NULL && (*line)->line == NULL)
97 		*line = TAILQ_NEXT(*line, lines);
98 
99 	if (*line == NULL)
100 		return NULL;
101 
102 	text = (*line)->line;
103 	*ret = *line;
104 	*line = TAILQ_NEXT(*line, lines);
105 	return text;
106 }
107 
108 /*
109  * Provide completions for toc
110  */
111 const char *
112 compl_toc(void **data, void **ret)
113 {
114 	struct line	**line = (struct line **)data;
115 	struct line	*l;
116 	const char	*text;
117 
118 	l = *line;
119 	while (l != NULL && (l->line == NULL ||
120 	    (l->type != LINE_TITLE_1 &&
121 	    l->type != LINE_TITLE_2 &&
122 	    l->type != LINE_TITLE_3)))
123 		l = TAILQ_NEXT(l, lines);
124 
125 	/* end of buffer */
126 	if (l == NULL)
127 		return NULL;
128 
129 	text = l->line;
130 	*ret = l;
131 	*line = TAILQ_NEXT(l, lines);
132 	return text;
133 }