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, const char **descr)
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 	*descr = (*state)->descr;
38 	return (*state)++->cmd;
39 }
40 
41 /*
42  * Provide completions for tab-select.
43  */
44 const char *
45 compl_ts(void **data, void **ret, const char **descr)
46 {
47 	struct tab	**tab = (struct tab **)data;
48 
49 	/* first time: init the state */
50 	if (*tab == NULL)
51 		*tab = TAILQ_FIRST(&tabshead);
52 	else if ((*tab = TAILQ_NEXT(*tab, tabs)) == NULL)
53 		return NULL;
54 
55 	*ret = *tab;
56 
57 	if (*(*tab)->buffer.page.title == '\0')
58 		return (*tab)->hist_cur->h;
59 	*descr = (*tab)->hist_cur->h;
60 	return (*tab)->buffer.page.title;
61 }
62 
63 /*
64  * Provide completions for link-select.
65  */
66 const char *
67 compl_ls(void **data, void **ret, const char **descr)
68 {
69 	struct line	**line = (struct line **)data;
70 	struct line	*l;
71 	const char	*link;
72 
73 	l = *line;
74 	while (l != NULL && l->type != LINE_LINK)
75 		l = TAILQ_NEXT(l, lines);
76 
77 	/* end of buffer */
78 	if (l == NULL)
79 		return NULL;
80 
81 	if ((link = l->line) == NULL) {
82 		link = l->alt;
83 		*descr = NULL;
84 	} else
85 		*descr = l->alt;
86 
87 	*ret = l;
88 	*line = TAILQ_NEXT(l, lines);
89 	return link;
90 }
91 
92 /*
93  * Provide completions for swiper.
94  */
95 const char *
96 compl_swiper(void **data, void **ret, const char **descr)
97 {
98 	struct line	**line = (struct line **)data;
99 	const char	*text;
100 
101 	while (*line != NULL && (*line)->line == NULL)
102 		*line = TAILQ_NEXT(*line, lines);
103 
104 	if (*line == NULL)
105 		return NULL;
106 
107 	text = (*line)->line;
108 	*ret = *line;
109 	*line = TAILQ_NEXT(*line, lines);
110 	return text;
111 }
112 
113 /*
114  * Provide completions for toc
115  */
116 const char *
117 compl_toc(void **data, void **ret, const char **descr)
118 {
119 	struct line	**line = (struct line **)data;
120 	struct line	*l;
121 	const char	*text;
122 
123 	l = *line;
124 	while (l != NULL && (l->line == NULL ||
125 	    (l->type != LINE_TITLE_1 &&
126 	    l->type != LINE_TITLE_2 &&
127 	    l->type != LINE_TITLE_3)))
128 		l = TAILQ_NEXT(l, lines);
129 
130 	/* end of buffer */
131 	if (l == NULL)
132 		return NULL;
133 
134 	text = l->line;
135 	*ret = l;
136 	*line = TAILQ_NEXT(l, lines);
137 	return text;
138 }