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 #ifndef TELESCOPE_H
18 #define TELESCOPE_H
19 
20 #include <limits.h>
21 #include <stdio.h>		/* XXX: for parsers.h */
22 
23 #include "iri.h"
24 
25 #define MIN(a, b) ((a) < (b) ? (a) : (b))
26 #define MAX(a, b) ((a) > (b) ? (a) : (b))
27 
28 #define GEMINI_URL_LEN 1024
29 #define TITLE_MAX 128+1		/* account for NUL too */
30 
31 #define SIDE_WINDOW_LEFT	0x1
32 #define SIDE_WINDOW_BOTTOM	0x2
33 
34 enum line_type {
35 	/* text/gemini */
36 	LINE_TEXT,
37 	LINE_LINK,
38 	LINE_TITLE_1,
39 	LINE_TITLE_2,
40 	LINE_TITLE_3,
41 	LINE_ITEM,
42 	LINE_QUOTE,
43 	LINE_PRE_START,
44 	LINE_PRE_CONTENT,
45 	LINE_PRE_END,
46 
47 	/* text/x-patch */
48 	LINE_PATCH,
49 	LINE_PATCH_HDR,
50 	LINE_PATCH_HUNK_HDR,
51 	LINE_PATCH_ADD,
52 	LINE_PATCH_DEL,
53 
54 	/* minibuffer */
55 	LINE_COMPL,
56 	LINE_COMPL_CURRENT,
57 
58 	/* help */
59 	LINE_HELP,
60 
61 	/* download */
62 	LINE_DOWNLOAD,
63 	LINE_DOWNLOAD_DONE,
64 	LINE_DOWNLOAD_INFO,
65 
66 	/* misc ui */
67 	LINE_FRINGE,
68 };
69 
70 struct line {
71 	enum line_type		 type;
72 	char			*line;
73 	char			*alt;
74 	void			*data;
75 
76 #define L_HIDDEN	0x1
77 	int			 flags;
78 	TAILQ_ENTRY(line)	 lines;
79 };
80 
81 struct vline {
82 	struct line		*parent;
83 	size_t			 from;
84 	size_t			 len;
85 
86 #define L_CONTINUATION	0x2
87 	int			 flags;
88 	TAILQ_ENTRY(vline)	 vlines;
89 };
90 
91 /*
92  * different types of trust for a certificate.  Following
93  * gemini://thfr.info/gemini/modified-trust-verify.gmi
94  */
95 enum trust_state {
96 	TS_UNKNOWN,
97 	TS_UNTRUSTED,
98 	TS_TEMP_TRUSTED,
99 	TS_TRUSTED,
100 	TS_VERIFIED,
101 };
102 
103 struct parser;
104 
105 struct buffer {
106 	char			 title[128 + 1];
107 	const char		*mode;
108 	char			*buf;
109 	size_t			 len;
110 	size_t			 cap;
111 
112 #define PARSER_IN_BODY	1
113 #define PARSER_IN_PRE	2
114 #define PARSER_IN_PATCH_HDR 4
115 	int			 parser_flags;
116 	const struct parser	*parser;
117 
118 	size_t			 last_line_off;
119 	int			 force_redraw;
120 
121 	int			 curs_x;
122 	int			 curs_y;
123 	size_t			 line_off;
124 	size_t			 line_max;
125 	struct vline		*top_line;
126 	struct vline		*current_line;
127 	size_t			 point_offset;
128 
129 	TAILQ_HEAD(, line)	 head;
130 	TAILQ_HEAD(vhead, vline) vhead;
131 };
132 
133 #define TAB_CURRENT	0x1	/* only for save_session */
134 #define TAB_KILLED	0x2	/* only for save_session */
135 #define TAB_URGENT	0x4
136 #define TAB_LAZY	0x8	/* to lazy load tabs */
137 
138 #define NEW_TAB_URL	"about:new"
139 
140 struct hist;
141 
142 TAILQ_HEAD(tabshead, tab);
143 extern struct tabshead tabshead;
144 extern struct tabshead ktabshead;
145 struct tab {
146 	TAILQ_ENTRY(tab)	 tabs;
147 	uint32_t		 id;
148 	uint32_t		 flags;
149 
150 	char			*cert;
151 	enum trust_state	 trust;
152 	int			 faulty_gemserver;
153 	const char		*client_cert;
154 	int			 client_cert_temp;
155 	struct proxy		*proxy;
156 	struct iri		 iri;
157 	struct hist		*hist;
158 	char			*last_input_url;
159 
160 	int			 code;
161 	char			 meta[GEMINI_URL_LEN];
162 	int			 redirect_count;
163 
164 	struct buffer		 buffer;
165 
166 	short			 loading_anim;
167 	short			 loading_anim_step;
168 	unsigned long		 loading_timer;
169 };
170 
171 extern TAILQ_HEAD(proxylist, proxy) proxies;
172 struct proxy {
173 	char	*match_proto;
174 
175 	char	*host;
176 	char	*port;
177 	int	 proto;
178 
179 	TAILQ_ENTRY(proxy) proxies;
180 };
181 
182 enum {
183 	PROTO_FINGER,
184 	PROTO_GEMINI,
185 	PROTO_GOPHER,
186 	/* ... */
187 };
188 
189 struct get_req {
190 	int		proto;
191 	char		host[254];
192 	char		port[16];
193 	char		req[1027];
194 };
195 
196 /* downloads.c */
197 extern STAILQ_HEAD(downloads, download) downloads;
198 struct download {
199 	uint32_t		 id;
200 	int			 fd;
201 	size_t			 bytes;
202 	char 			*mime_type;
203 	char			*path;
204 	STAILQ_ENTRY(download)	 entries;
205 };
206 
207 void		 recompute_downloads(void);
208 struct download	*enqueue_download(uint32_t, const char *, const char *);
209 struct download	*download_by_id(uint32_t);
210 void 	 	 download_finished(struct download *);
211 
212 /* help.c */
213 void		 recompute_help(void);
214 
215 /* mime.c */
216 int		 setup_parser_for(struct tab*);
217 
218 /* net.c */
219 int		 net_main(void);
220 
221 /* parse.y */
222 void		 parseconfig(const char *, int);
223 
224 /* sandbox.c */
225 void		 sandbox_net_process(void);
226 void		 sandbox_ui_process(void);
227 
228 /* telescope.c */
229 extern int operating;
230 extern int safe_mode;
231 
232 #define LU_MODE_NONE	0x0
233 #define LU_MODE_NOHIST	0x1
234 #define LU_MODE_NOCACHE	0x2
235 
236 void		 gopher_send_search_req(struct tab *, const char *);
237 void		 load_page_from_str(struct tab *, const char *);
238 void		 load_url(struct tab *, const char *, const char *, int);
239 void		 load_url_in_tab(struct tab *, const char *, const char *, int);
240 int		 load_previous_page(struct tab*);
241 int		 load_next_page(struct tab*);
242 void		 write_buffer(const char *, struct tab *);
243 void		 humanify_url(const char *, const char *, char *, size_t);
244 int		 bookmark_page(const char *);
245 int		 ui_send_net(int, uint32_t, int, const void *, uint16_t);
246 
247 /* wrap.c */
248 void		 erase_buffer(struct buffer *);
249 void		 empty_linelist(struct buffer*);
250 void		 empty_vlist(struct buffer*);
251 int		 wrap_text(struct buffer*, const char*, struct line*, size_t, int, int);
252 int		 wrap_page(struct buffer *, int, int);
253 
254 #endif /* TELESCOPE_H */