1 /*
2  * Copyright (c) 2021, 2024 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 "compat.h"
18 
19 #include <stdlib.h>
20 
21 #include "certs.h"
22 #include "cmd.h"
23 #include "compl.h"
24 #include "hist.h"
25 #include "telescope.h"
26 #include "session.h"
27 
28 /*
29  * Provide completions for load-url (lu).
30  */
31 const char *
32 compl_lu(void **data, void **ret, const char **descr)
33 {
34 	struct history_item **state = (struct history_item **)data;
35 
36 	/* first time: init the state */
37 	if (*state == NULL)
38 		*state = history.items;
39 
40 	if (*state == history.items + history.len)
41 		return NULL;
42 
43 	return (*state)++->uri;
44 }
45 
46 /*
47  * Provide completions for execute-extended-command (eecmd).
48  */
49 const char *
50 compl_eecmd(void **data, void **ret, const char **descr)
51 {
52 	struct cmd	**state = (struct cmd **)data;
53 
54 	/* first time: init the state */
55 	if (*state == NULL)
56 		*state = cmds;
57 
58 	if ((*state)->cmd == NULL)
59 		return NULL;
60 
61 	*descr = (*state)->descr;
62 	return (*state)++->cmd;
63 }
64 
65 /*
66  * Provide completions for tab-select.
67  */
68 const char *
69 compl_ts(void **data, void **ret, const char **descr)
70 {
71 	struct tab	**tab = (struct tab **)data;
72 
73 	/* first time: init the state */
74 	if (*tab == NULL)
75 		*tab = TAILQ_FIRST(&tabshead);
76 	else if ((*tab = TAILQ_NEXT(*tab, tabs)) == NULL)
77 		return NULL;
78 
79 	*ret = *tab;
80 
81 	if (*(*tab)->buffer.title == '\0')
82 		return hist_cur((*tab)->hist);
83 	*descr = hist_cur((*tab)->hist);
84 	return (*tab)->buffer.title;
85 }
86 
87 /*
88  * Provide completions for link-select.
89  */
90 const char *
91 compl_ls(void **data, void **ret, const char **descr)
92 {
93 	struct line	**line = (struct line **)data;
94 	struct line	*l;
95 	const char	*link;
96 
97 	l = *line;
98 	while (l != NULL && l->type != LINE_LINK)
99 		l = TAILQ_NEXT(l, lines);
100 
101 	/* end of buffer */
102 	if (l == NULL)
103 		return NULL;
104 
105 	if ((link = l->line) == NULL) {
106 		link = l->alt;
107 		*descr = NULL;
108 	} else
109 		*descr = l->alt;
110 
111 	*ret = l;
112 	*line = TAILQ_NEXT(l, lines);
113 	return link;
114 }
115 
116 /*
117  * Provide completions for swiper.
118  */
119 const char *
120 compl_swiper(void **data, void **ret, const char **descr)
121 {
122 	struct line	**line = (struct line **)data;
123 	const char	*text;
124 
125 	while (*line != NULL && (*line)->line == NULL)
126 		*line = TAILQ_NEXT(*line, lines);
127 
128 	if (*line == NULL)
129 		return NULL;
130 
131 	text = (*line)->line;
132 	*ret = *line;
133 	*line = TAILQ_NEXT(*line, lines);
134 	return text;
135 }
136 
137 /*
138  * Provide completions for toc
139  */
140 const char *
141 compl_toc(void **data, void **ret, const char **descr)
142 {
143 	struct line	**line = (struct line **)data;
144 	struct line	*l;
145 	const char	*text;
146 
147 	l = *line;
148 	while (l != NULL && (l->line == NULL ||
149 	    (l->type != LINE_TITLE_1 &&
150 	    l->type != LINE_TITLE_2 &&
151 	    l->type != LINE_TITLE_3)))
152 		l = TAILQ_NEXT(l, lines);
153 
154 	/* end of buffer */
155 	if (l == NULL)
156 		return NULL;
157 
158 	text = l->line;
159 	*ret = l;
160 	*line = TAILQ_NEXT(l, lines);
161 	return text;
162 }
163 
164 /*
165  * Provide completions for use-certificate
166  */
167 const char *
168 compl_uc(void **data, void **ret, const char **descr)
169 {
170 	const char	***state = (const char ***)data;
171 
172 	/* first time: init the state */
173 	if (*state == NULL)
174 		*state = (const char **)identities;
175 
176 	if (**state == NULL)
177 		return NULL;
178 
179 	/* XXX filling descr too would be nice */
180 	return *((*state)++);
181 }