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 "compat.h"
18 
19 #include <errno.h>
20 #include <stdio.h>
21 #include <stdlib.h>
22 #include <string.h>
23 #include <unistd.h>
24 
25 #include "defaults.h"
26 #include "fs.h"
27 #include "minibuffer.h"
28 #include "parser.h"
29 #include "session.h"
30 #include "ui.h"
31 
32 static struct event	 autosaveev;
33 
34 void
35 switch_to_tab(struct tab *tab)
36 {
37 	current_tab = tab;
38 	tab->flags &= ~TAB_URGENT;
39 
40 	if (operating && tab->flags & TAB_LAZY) {
41 		tab->flags ^= TAB_LAZY;
42 		load_url_in_tab(tab, tab->hist_cur->h, NULL, 1);
43 	}
44 }
45 
46 unsigned int
47 tab_new_id(void)
48 {
49 	static uint32_t tab_counter;
50 
51 	return tab_counter++;
52 }
53 
54 struct tab *
55 new_tab(const char *url, const char *base, struct tab *after)
56 {
57 	struct tab	*tab;
58 
59 	ui_schedule_redraw();
60 	autosave_hook();
61 
62 	if ((tab = calloc(1, sizeof(*tab))) == NULL) {
63 		event_loopbreak();
64 		return NULL;
65 	}
66 
67 	TAILQ_INIT(&tab->hist.head);
68 
69 	TAILQ_INIT(&tab->buffer.head);
70 	TAILQ_INIT(&tab->buffer.page.head);
71 
72 	tab->id = tab_new_id();
73 
74 	if (after != NULL)
75 		TAILQ_INSERT_AFTER(&tabshead, after, tab, tabs);
76 	else
77 		TAILQ_INSERT_TAIL(&tabshead, tab, tabs);
78 
79 	if (!operating)
80 		tab->flags |= TAB_LAZY;
81 	load_url_in_tab(tab, url, base, 0);
82 	switch_to_tab(tab);
83 	return tab;
84 }
85 
86 /*
87  * Free every resource linked to the tab, including the tab itself.
88  * Removes the tab from the tablist, but doesn't update the
89  * current_tab though.
90  */
91 void
92 free_tab(struct tab *tab)
93 {
94 	stop_tab(tab);
95 	ui_schedule_redraw();
96 	autosave_hook();
97 
98 	if (evtimer_pending(&tab->loadingev, NULL))
99 		evtimer_del(&tab->loadingev);
100 
101 	TAILQ_REMOVE(&tabshead, tab, tabs);
102 	free(tab);
103 }
104 
105 void
106 stop_tab(struct tab *tab)
107 {
108 	ui_send_net(IMSG_STOP, tab->id, NULL, 0);
109 }
110 
111 void
112 save_session(void)
113 {
114 	struct session_tab	 st;
115 	struct session_tab_hist	 sth;
116 	struct tab		*tab;
117 	struct hist		*h;
118 	int			 future;
119 
120 	if (safe_mode)
121 		return;
122 
123 	ui_send_fs(IMSG_SESSION_START, 0, NULL, 0);
124 
125 	TAILQ_FOREACH(tab, &tabshead, tabs) {
126 		memset(&st, 0, sizeof(st));
127 
128 		if (tab == current_tab)
129 			st.flags = TAB_CURRENT;
130 
131 		strlcpy(st.uri, tab->hist_cur->h, sizeof(st.uri));
132 		strlcpy(st.title, tab->buffer.page.title, sizeof(st.title));
133 		ui_send_fs(IMSG_SESSION_TAB, 0, &st, sizeof(st));
134 
135 		future = 0;
136 		TAILQ_FOREACH(h, &tab->hist.head, entries) {
137 			if (h == tab->hist_cur) {
138 				future = 1;
139 				continue;
140 			}
141 
142 			memset(&sth, 0, sizeof(sth));
143 			strlcpy(sth.uri, h->h, sizeof(sth.uri));
144 			sth.future = future;
145 			ui_send_fs(IMSG_SESSION_TAB_HIST, 0, &sth, sizeof(sth));
146 		}
147 	}
148 
149 	ui_send_fs(IMSG_SESSION_END, 0, NULL, 0);
150 }
151 
152 void
153 autosave_init(void)
154 {
155 	evtimer_set(&autosaveev, autosave_timer, NULL);
156 }
157 
158 void
159 autosave_timer(int fd, short event, void *data)
160 {
161 	save_session();
162 }
163 
164 /*
165  * Function to be called in "interesting" places where we may want to
166  * schedule an autosave (like on new tab or before loading an url.)
167  */
168 void
169 autosave_hook(void)
170 {
171 	struct timeval tv;
172 
173 	if (autosave <= 0)
174 		return;
175 
176 	if (!evtimer_pending(&autosaveev, NULL)) {
177 		tv.tv_sec = autosave;
178 		tv.tv_usec = 0;
179 
180 		evtimer_add(&autosaveev, &tv);
181 	}
182 }