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 #ifndef TELESCOPE_H
18 #define TELESCOPE_H
19 
20 #include <config.h>
21 #include <url.h>
22 
23 /* TODO: move in config.h */
24 #include <sys/queue.h>
25 #include <sys/types.h>
26 #include <sys/uio.h>
27 #include <stdint.h>
28 #include <imsg.h>
29 
30 #define GEMINI_URL_LEN 1024
31 
32 enum imsg_type {
33 	IMSG_GET,		/* data is URL, peerid the tab id */
34 	IMSG_ERR,
35 	IMSG_CHECK_CERT,
36 	IMSG_CERT_STATUS,
37 	IMSG_GOT_CODE,
38 	IMSG_GOT_META,
39 	IMSG_PROCEED,
40 	IMSG_STOP,
41 	IMSG_BUF,
42 	IMSG_EOF,
43 	IMSG_QUIT,
44 };
45 
46 enum line_type {
47 	LINE_TEXT,
48 	LINE_LINK,
49 	LINE_TITLE_1,
50 	LINE_TITLE_2,
51 	LINE_TITLE_3,
52 	LINE_ITEM,
53 	LINE_QUOTE,
54 	LINE_PRE_START,
55 	LINE_PRE_CONTENT,
56 	LINE_PRE_END,
57 };
58 
59 struct line {
60 	enum line_type		 type;
61 	char			*line;
62 	char			*alt;
63 	TAILQ_ENTRY(line)	 lines;
64 };
65 
66 struct parser;
67 struct page;
68 
69 /* typedef void	(*initparserfn)(struct parser*); */
70 
71 typedef int	(*parsechunkfn)(struct parser*, const char*, size_t);
72 typedef int	(*parserfreefn)(struct parser*);
73 
74 typedef void (imsg_handlerfn)(struct imsg*, size_t);
75 
76 struct parser {
77 	char		*buf;
78 	size_t		 len;
79 	size_t		 cap;
80 	int		 flags;
81 	parsechunkfn	 parse;
82 	parserfreefn	 free;
83 
84 	TAILQ_HEAD(, line)	 head;
85 };
86 
87 struct ui_state;
88 
89 extern TAILQ_HEAD(tabshead, tab) tabshead;
90 struct tab {
91 	struct parser		 page;
92 	TAILQ_ENTRY(tab)	 tabs;
93 	uint32_t		 id;
94 	uint32_t		 flags;
95 
96 	int			 code;
97 	char			 meta[GEMINI_URL_LEN];
98 	int			 redirect_count;
99 
100 	struct ui_state		*s;
101 };
102 
103 extern struct event		 imsgev;
104 
105 /* gemini.c */
106 int		 client_main(struct imsgbuf *b);
107 
108 /* gemtext.c */
109 void		 gemtext_initparser(struct parser*);
110 
111 /* pages.c */
112 extern const char	*about_new;
113 
114 #define CANNOT_FETCH		0
115 #define TOO_MUCH_REDIRECTS	1
116 extern const char	*err_pages[70];
117 
118 /* ui.c */
119 int		 ui_init(void);
120 int		 ui_on_new_tab(struct tab*);
121 void		 ui_on_tab_refresh(struct tab*);
122 void		 ui_end(void);
123 
124 /* util.c */
125 int		 mark_nonblock(int);
126 char		*telescope_strnchr(char*, char, size_t);
127 
128 #endif /* TELESCOPE_H */