Annotation of src/usr.bin/tmux/tty-features.c, Revision 1.4
1.4 ! nicm 1: /* $OpenBSD: tty-features.c,v 1.3 2020/04/20 15:37:32 nicm Exp $ */
1.1 nicm 2:
3: /*
4: * Copyright (c) 2020 Nicholas Marriott <nicholas.marriott@gmail.com>
5: *
6: * Permission to use, copy, modify, and distribute this software for any
7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15: * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16: * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17: */
18:
19: #include <sys/types.h>
20:
21: #include <stdlib.h>
22: #include <string.h>
23:
24: #include "tmux.h"
25:
26: /*
27: * Still hardcoded:
28: * - bracket paste (sent if application asks for it);
29: * - mouse (under kmous capability);
30: * - focus events (under focus-events option);
31: * - default colours (under AX or op capabilities);
32: * - AIX colours (under colors >= 16);
33: * - alternate escape (under XT).
34: *
35: * Also:
36: * - XT is used to decide whether to send DA and DSR,
37: * - DECSLRM and DECFRA use a flag instead of capabilities.
38: * - UTF-8 is a separate flag on the client; needed for unattached clients.
39: */
40:
41: /* A named terminal feature. */
42: struct tty_feature {
43: const char *name;
44: const char **capabilities;
45: int flags;
46: };
47:
48: /* Terminal has xterm(1) title setting. */
49: static const char *tty_feature_title_capabilities[] = {
50: "tsl=\\E]0;", /* should be using TS really */
51: "fsl=\\a",
52: NULL
53: };
54: static struct tty_feature tty_feature_title = {
55: "title",
56: tty_feature_title_capabilities,
57: 0
58: };
59:
60: /* Terminal can set the clipboard with OSC 52. */
61: static const char *tty_feature_clipboard_capabilities[] = {
62: "Ms=\\E]52;%p1%s;%p2%s\\a",
63: NULL
64: };
65: static struct tty_feature tty_feature_clipboard = {
66: "clipboard",
67: tty_feature_clipboard_capabilities,
68: 0
69: };
70:
71: /*
72: * Terminal supports RGB colour. This replaces setab and setaf also since
73: * terminals with RGB have versions that do not allow setting colours from the
74: * 256 palette.
75: */
76: static const char *tty_feature_rgb_capabilities[] = {
1.4 ! nicm 77: "AX",
1.1 nicm 78: "setrgbf=\\E[38;2;%p1%d;%p2%d;%p3%dm",
79: "setrgbb=\\E[48;2;%p1%d;%p2%d;%p3%dm",
80: "setab=\\E[%?%p1%{8}%<%t4%p1%d%e%p1%{16}%<%t10%p1%{8}%-%d%e48;5;%p1%d%;m",
81: "setaf=\\E[%?%p1%{8}%<%t3%p1%d%e%p1%{16}%<%t9%p1%{8}%-%d%e38;5;%p1%d%;m",
82: NULL
83: };
84: static struct tty_feature tty_feature_rgb = {
85: "RGB",
86: tty_feature_rgb_capabilities,
87: (TERM_256COLOURS|TERM_RGBCOLOURS)
88: };
89:
90: /* Terminal supports 256 colours. */
91: static const char *tty_feature_256_capabilities[] = {
1.4 ! nicm 92: "AX",
1.1 nicm 93: "setab=\\E[%?%p1%{8}%<%t4%p1%d%e%p1%{16}%<%t10%p1%{8}%-%d%e48;5;%p1%d%;m",
94: "setaf=\\E[%?%p1%{8}%<%t3%p1%d%e%p1%{16}%<%t9%p1%{8}%-%d%e38;5;%p1%d%;m",
95: NULL
96: };
97: static struct tty_feature tty_feature_256 = {
98: "256",
99: tty_feature_256_capabilities,
100: TERM_256COLOURS
101: };
102:
103: /* Terminal supports overline. */
104: static const char *tty_feature_overline_capabilities[] = {
105: "Smol=\\E[53m",
106: NULL
107: };
108: static struct tty_feature tty_feature_overline = {
109: "overline",
110: tty_feature_overline_capabilities,
111: 0
112: };
113:
114: /* Terminal supports underscore styles. */
115: static const char *tty_feature_usstyle_capabilities[] = {
116: "Smulx=\E[4::%p1%dm",
117: "Setulc=\E[58::2::%p1%{65536}%/%d::%p1%{256}%/%{255}%&%d::%p1%{255}%&%d%;m",
118: NULL
119: };
120: static struct tty_feature tty_feature_usstyle = {
121: "usstyle",
122: tty_feature_usstyle_capabilities,
123: 0
124: };
125:
126: /* Terminal supports cursor styles. */
127: static const char *tty_feature_cstyle_capabilities[] = {
128: "Ss=\\E[%p1%d q",
129: "Se=\\E[2 q",
130: NULL
131: };
132: static struct tty_feature tty_feature_cstyle = {
133: "cstyle",
134: tty_feature_cstyle_capabilities,
135: 0
136: };
137:
138: /* Terminal supports cursor colours. */
139: static const char *tty_feature_ccolour_capabilities[] = {
140: "Cs=\\E]12;%p1%s\\a",
141: "Cr=\\E]112\\a",
142: NULL
143: };
144: static struct tty_feature tty_feature_ccolour = {
145: "ccolour",
146: tty_feature_ccolour_capabilities,
147: 0
148: };
149:
150: /* Terminal supports synchronized updates. */
151: static const char *tty_feature_sync_capabilities[] = {
1.2 nicm 152: "Sync=\\EP=%p1%ds\\E\\\\",
1.1 nicm 153: NULL
154: };
155: static struct tty_feature tty_feature_sync = {
156: "sync",
157: tty_feature_sync_capabilities,
158: 0
159: };
160:
161: /* Terminal supports DECSLRM margins. */
162: static struct tty_feature tty_feature_margins = {
163: "margins",
164: NULL,
165: TERM_DECSLRM
166: };
167:
168: /* Terminal supports DECFRA rectangle fill. */
169: static struct tty_feature tty_feature_rectfill = {
170: "rectfill",
171: NULL,
172: TERM_DECFRA
173: };
174:
175: /* Available terminal features. */
176: static const struct tty_feature *tty_features[] = {
177: &tty_feature_256,
178: &tty_feature_clipboard,
179: &tty_feature_ccolour,
180: &tty_feature_cstyle,
181: &tty_feature_margins,
182: &tty_feature_overline,
183: &tty_feature_rectfill,
184: &tty_feature_rgb,
185: &tty_feature_sync,
186: &tty_feature_title,
187: &tty_feature_usstyle
188: };
189:
190: void
191: tty_add_features(int *feat, const char *s, const char *separators)
192: {
193: const struct tty_feature *tf;
194: char *next, *loop, *copy;
195: u_int i;
196:
197: loop = copy = xstrdup(s);
198: while ((next = strsep(&loop, separators)) != NULL) {
199: for (i = 0; i < nitems(tty_features); i++) {
200: tf = tty_features[i];
201: if (strcasecmp(tf->name, next) == 0)
202: break;
203: }
204: if (i == nitems(tty_features)) {
205: log_debug("unknown terminal feature: %s", next);
206: break;
207: }
208: if (~(*feat) & (1 << i)) {
209: log_debug("adding terminal feature: %s", tf->name);
210: (*feat) |= (1 << i);
211: }
212: }
213: free(copy);
214: }
215:
216: const char *
217: tty_get_features(int feat)
218: {
219: const struct tty_feature *tf;
220: static char s[512];
221: u_int i;
222:
223: *s = '\0';
224: for (i = 0; i < nitems(tty_features); i++) {
225: if (~feat & (1 << i))
226: continue;
227: tf = tty_features[i];
228:
229: strlcat(s, tf->name, sizeof s);
230: strlcat(s, ",", sizeof s);
231: }
232: if (*s != '\0')
233: s[strlen(s) - 1] = '\0';
234: return (s);
235: }
236:
1.3 nicm 237: int
1.1 nicm 238: tty_apply_features(struct tty_term *term, int feat)
239: {
240: const struct tty_feature *tf;
241: const char **capability;
242: u_int i;
243:
244: if (feat == 0)
1.3 nicm 245: return (0);
1.1 nicm 246: log_debug("applying terminal features: %s", tty_get_features(feat));
247:
248: for (i = 0; i < nitems(tty_features); i++) {
249: if ((term->features & (1 << i)) || (~feat & (1 << i)))
250: continue;
251: tf = tty_features[i];
252:
253: log_debug("applying terminal feature: %s", tf->name);
254: if (tf->capabilities != NULL) {
255: capability = tf->capabilities;
256: while (*capability != NULL) {
257: log_debug("adding capability: %s", *capability);
258: tty_term_apply(term, *capability, 1);
259: capability++;
260: }
261: }
262: term->flags |= tf->flags;
263: }
1.3 nicm 264: if ((term->features | feat) == term->features)
265: return (0);
1.1 nicm 266: term->features |= feat;
1.3 nicm 267: return (1);
1.1 nicm 268: }
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