tty-features.c

   1 /* $OpenBSD$ */
   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  * - default colours (under AX or op capabilities);
  29  * - AIX colours (under colors >= 16);
  30  * - alternate escape (if terminal is VT100-like).
  31  *
  32  * Also:
  33  * - DECFRA uses a flag instead of capabilities;
  34  * - UTF-8 is a separate flag on the client; needed for unattached clients.
  35  */
  36
  37 /* A named terminal feature. */
  38 struct tty_feature {
  39         const char              *name;
  40         const char *const       *capabilities;
  41         int                      flags;
  42 };
  43
  44 /* Terminal has xterm(1) title setting. */
  45 static const char *const tty_feature_title_capabilities[] = {
  46         "tsl=\\E]0;", /* should be using TS really */
  47         "fsl=\\a",
  48         NULL
  49 };
  50 static const struct tty_feature tty_feature_title = {
  51         "title",
  52         tty_feature_title_capabilities,
  53         0
  54 };
  55
  56 /* Terminal has OSC 7 working directory. */
  57 static const char *const tty_feature_osc7_capabilities[] = {
  58         "Swd=\\E]7;",
  59         "fsl=\\a",
  60         NULL
  61 };
  62 static const struct tty_feature tty_feature_osc7 = {
  63         "osc7",
  64         tty_feature_osc7_capabilities,
  65         0
  66 };
  67
  68 /* Terminal has mouse support. */
  69 static const char *const tty_feature_mouse_capabilities[] = {
  70         "kmous=\\E[M",
  71         NULL
  72 };
  73 static const struct tty_feature tty_feature_mouse = {
  74         "mouse",
  75         tty_feature_mouse_capabilities,
  76         0
  77 };
  78
  79 /* Terminal can set the clipboard with OSC 52. */
  80 static const char *const tty_feature_clipboard_capabilities[] = {
  81         "Ms=\\E]52;%p1%s;%p2%s\\a",
  82         NULL
  83 };
  84 static const struct tty_feature tty_feature_clipboard = {
  85         "clipboard",
  86         tty_feature_clipboard_capabilities,
  87         0
  88 };
  89
  90 /* Terminal supports OSC 8 hyperlinks. */
  91 static const char *const tty_feature_hyperlinks_capabilities[] = {
  92         "*:Hls=\\E]8;%?%p1%l%tid=%p1%s%;;%p2%s\\E\\\\",
  93         NULL
  94 };
  95 static const struct tty_feature tty_feature_hyperlinks = {
  96         "hyperlinks",
  97         tty_feature_hyperlinks_capabilities,
  98         0
  99 };
 100
 101 /*
 102  * Terminal supports RGB colour. This replaces setab and setaf also since
 103  * terminals with RGB have versions that do not allow setting colours from the
 104  * 256 palette.
 105  */
 106 static const char *const tty_feature_rgb_capabilities[] = {
 107         "AX",
 108         "setrgbf=\\E[38;2;%p1%d;%p2%d;%p3%dm",
 109         "setrgbb=\\E[48;2;%p1%d;%p2%d;%p3%dm",
 110         "setab=\\E[%?%p1%{8}%<%t4%p1%d%e%p1%{16}%<%t10%p1%{8}%-%d%e48;5;%p1%d%;m",
 111         "setaf=\\E[%?%p1%{8}%<%t3%p1%d%e%p1%{16}%<%t9%p1%{8}%-%d%e38;5;%p1%d%;m",
 112         NULL
 113 };
 114 static const struct tty_feature tty_feature_rgb = {
 115         "RGB",
 116         tty_feature_rgb_capabilities,
 117         TERM_256COLOURS|TERM_RGBCOLOURS
 118 };
 119
 120 /* Terminal supports 256 colours. */
 121 static const char *const tty_feature_256_capabilities[] = {
 122         "AX",
 123         "setab=\\E[%?%p1%{8}%<%t4%p1%d%e%p1%{16}%<%t10%p1%{8}%-%d%e48;5;%p1%d%;m",
 124         "setaf=\\E[%?%p1%{8}%<%t3%p1%d%e%p1%{16}%<%t9%p1%{8}%-%d%e38;5;%p1%d%;m",
 125         NULL
 126 };
 127 static const struct tty_feature tty_feature_256 = {
 128         "256",
 129         tty_feature_256_capabilities,
 130         TERM_256COLOURS
 131 };
 132
 133 /* Terminal supports overline. */
 134 static const char *const tty_feature_overline_capabilities[] = {
 135         "Smol=\\E[53m",
 136         NULL
 137 };
 138 static const struct tty_feature tty_feature_overline = {
 139         "overline",
 140         tty_feature_overline_capabilities,
 141         0
 142 };
 143
 144 /* Terminal supports underscore styles. */
 145 static const char *const tty_feature_usstyle_capabilities[] = {
 146         "Smulx=\\E[4::%p1%dm",
 147         "Setulc=\\E[58::2::%p1%{65536}%/%d::%p1%{256}%/%{255}%&%d::%p1%{255}%&%d%;m",
 148         "ol=\\E[59m",
 149         NULL
 150 };
 151 static const struct tty_feature tty_feature_usstyle = {
 152         "usstyle",
 153         tty_feature_usstyle_capabilities,
 154         0
 155 };
 156
 157 /* Terminal supports bracketed paste. */
 158 static const char *const tty_feature_bpaste_capabilities[] = {
 159         "Enbp=\\E[?2004h",
 160         "Dsbp=\\E[?2004l",
 161         NULL
 162 };
 163 static const struct tty_feature tty_feature_bpaste = {
 164         "bpaste",
 165         tty_feature_bpaste_capabilities,
 166         0
 167 };
 168
 169 /* Terminal supports focus reporting. */
 170 static const char *const tty_feature_focus_capabilities[] = {
 171         "Enfcs=\\E[?1004h",
 172         "Dsfcs=\\E[?1004l",
 173         NULL
 174 };
 175 static const struct tty_feature tty_feature_focus = {
 176         "focus",
 177         tty_feature_focus_capabilities,
 178         0
 179 };
 180
 181 /* Terminal supports cursor styles. */
 182 static const char *const tty_feature_cstyle_capabilities[] = {
 183         "Ss=\\E[%p1%d q",
 184         "Se=\\E[2 q",
 185         NULL
 186 };
 187 static const struct tty_feature tty_feature_cstyle = {
 188         "cstyle",
 189         tty_feature_cstyle_capabilities,
 190         0
 191 };
 192
 193 /* Terminal supports cursor colours. */
 194 static const char *const tty_feature_ccolour_capabilities[] = {
 195         "Cs=\\E]12;%p1%s\\a",
 196         "Cr=\\E]112\\a",
 197         NULL
 198 };
 199 static const struct tty_feature tty_feature_ccolour = {
 200         "ccolour",
 201         tty_feature_ccolour_capabilities,
 202         0
 203 };
 204
 205 /* Terminal supports strikethrough. */
 206 static const char *const tty_feature_strikethrough_capabilities[] = {
 207         "smxx=\\E[9m",
 208         NULL
 209 };
 210 static const struct tty_feature tty_feature_strikethrough = {
 211         "strikethrough",
 212         tty_feature_strikethrough_capabilities,
 213         0
 214 };
 215
 216 /* Terminal supports synchronized updates. */
 217 static const char *const tty_feature_sync_capabilities[] = {
 218         "Sync=\\EP=%p1%ds\\E\\\\",
 219         NULL
 220 };
 221 static const struct tty_feature tty_feature_sync = {
 222         "sync",
 223         tty_feature_sync_capabilities,
 224         0
 225 };
 226
 227 /* Terminal supports extended keys. */
 228 static const char *const tty_feature_extkeys_capabilities[] = {
 229         "Eneks=\\E[>4;1m",
 230         "Dseks=\\E[>4m",
 231         NULL
 232 };
 233 static const struct tty_feature tty_feature_extkeys = {
 234         "extkeys",
 235         tty_feature_extkeys_capabilities,
 236         0
 237 };
 238
 239 /* Terminal supports DECSLRM margins. */
 240 static const char *const tty_feature_margins_capabilities[] = {
 241         "Enmg=\\E[?69h",
 242         "Dsmg=\\E[?69l",
 243         "Clmg=\\E[s",
 244         "Cmg=\\E[%i%p1%d;%p2%ds",
 245         NULL
 246 };
 247 static const struct tty_feature tty_feature_margins = {
 248         "margins",
 249         tty_feature_margins_capabilities,
 250         TERM_DECSLRM
 251 };
 252
 253 /* Terminal supports DECFRA rectangle fill. */
 254 static const char *const tty_feature_rectfill_capabilities[] = {
 255         "Rect",
 256         NULL
 257 };
 258 static const struct tty_feature tty_feature_rectfill = {
 259         "rectfill",
 260         tty_feature_rectfill_capabilities,
 261         TERM_DECFRA
 262 };
 263
 264 /* Use builtin function keys only. */
 265 static const char *const tty_feature_ignorefkeys_capabilities[] = {
 266         "kf0@",
 267         "kf1@",
 268         "kf2@",
 269         "kf3@",
 270         "kf4@",
 271         "kf5@",
 272         "kf6@",
 273         "kf7@",
 274         "kf8@",
 275         "kf9@",
 276         "kf10@",
 277         "kf11@",
 278         "kf12@",
 279         "kf13@",
 280         "kf14@",
 281         "kf15@",
 282         "kf16@",
 283         "kf17@",
 284         "kf18@",
 285         "kf19@",
 286         "kf20@",
 287         "kf21@",
 288         "kf22@",
 289         "kf23@",
 290         "kf24@",
 291         "kf25@",
 292         "kf26@",
 293         "kf27@",
 294         "kf28@",
 295         "kf29@",
 296         "kf30@",
 297         "kf31@",
 298         "kf32@",
 299         "kf33@",
 300         "kf34@",
 301         "kf35@",
 302         "kf36@",
 303         "kf37@",
 304         "kf38@",
 305         "kf39@",
 306         "kf40@",
 307         "kf41@",
 308         "kf42@",
 309         "kf43@",
 310         "kf44@",
 311         "kf45@",
 312         "kf46@",
 313         "kf47@",
 314         "kf48@",
 315         "kf49@",
 316         "kf50@",
 317         "kf51@",
 318         "kf52@",
 319         "kf53@",
 320         "kf54@",
 321         "kf55@",
 322         "kf56@",
 323         "kf57@",
 324         "kf58@",
 325         "kf59@",
 326         "kf60@",
 327         "kf61@",
 328         "kf62@",
 329         "kf63@",
 330         NULL
 331 };
 332 static const struct tty_feature tty_feature_ignorefkeys = {
 333         "ignorefkeys",
 334         tty_feature_ignorefkeys_capabilities,
 335         0
 336 };
 337
 338 /* Available terminal features. */
 339 static const struct tty_feature *const tty_features[] = {
 340         &tty_feature_256,
 341         &tty_feature_bpaste,
 342         &tty_feature_ccolour,
 343         &tty_feature_clipboard,
 344         &tty_feature_hyperlinks,
 345         &tty_feature_cstyle,
 346         &tty_feature_extkeys,
 347         &tty_feature_focus,
 348         &tty_feature_ignorefkeys,
 349         &tty_feature_margins,
 350         &tty_feature_mouse,
 351         &tty_feature_osc7,
 352         &tty_feature_overline,
 353         &tty_feature_rectfill,
 354         &tty_feature_rgb,
 355         &tty_feature_strikethrough,
 356         &tty_feature_sync,
 357         &tty_feature_title,
 358         &tty_feature_usstyle
 359 };
 360
 361 void
 362 tty_add_features(int *feat, const char *s, const char *separators)
 363 {
 364         const struct tty_feature         *tf;
 365         char                             *next, *loop, *copy;
 366         u_int                             i;
 367
 368         log_debug("adding terminal features %s", s);
 369
 370         loop = copy = xstrdup(s);
 371         while ((next = strsep(&loop, separators)) != NULL) {
 372                 for (i = 0; i < nitems(tty_features); i++) {
 373                         tf = tty_features[i];
 374                         if (strcasecmp(tf->name, next) == 0)
 375                                 break;
 376                 }
 377                 if (i == nitems(tty_features)) {
 378                         log_debug("unknown terminal feature: %s", next);
 379                         break;
 380                 }
 381                 if (~(*feat) & (1 << i)) {
 382                         log_debug("adding terminal feature: %s", tf->name);
 383                         (*feat) |= (1 << i);
 384                 }
 385         }
 386         free(copy);
 387 }
 388
 389 const char *
 390 tty_get_features(int feat)
 391 {
 392         const struct tty_feature        *tf;
 393         static char                      s[512];
 394         u_int                            i;
 395
 396         *s = '\0';
 397         for (i = 0; i < nitems(tty_features); i++) {
 398                 if (~feat & (1 << i))
 399                         continue;
 400                 tf = tty_features[i];
 401
 402                 strlcat(s, tf->name, sizeof s);
 403                 strlcat(s, ",", sizeof s);
 404         }
 405         if (*s != '\0')
 406                 s[strlen(s) - 1] = '\0';
 407         return (s);
 408 }
 409
 410 int
 411 tty_apply_features(struct tty_term *term, int feat)
 412 {
 413         const struct tty_feature        *tf;
 414         const char *const               *capability;
 415         u_int                            i;
 416
 417         if (feat == 0)
 418                 return (0);
 419         log_debug("applying terminal features: %s", tty_get_features(feat));
 420
 421         for (i = 0; i < nitems(tty_features); i++) {
 422                 if ((term->features & (1 << i)) || (~feat & (1 << i)))
 423                         continue;
 424                 tf = tty_features[i];
 425
 426                 log_debug("applying terminal feature: %s", tf->name);
 427                 if (tf->capabilities != NULL) {
 428                         capability = tf->capabilities;
 429                         while (*capability != NULL) {
 430                                 log_debug("adding capability: %s", *capability);
 431                                 tty_term_apply(term, *capability, 1);
 432                                 capability++;
 433                         }
 434                 }
 435                 term->flags |= tf->flags;
 436         }
 437         if ((term->features | feat) == term->features)
 438                 return (0);
 439         term->features |= feat;
 440         return (1);
 441 }
 442
 443 void
 444 tty_default_features(int *feat, const char *name, u_int version)
 445 {
 446         static const struct {
 447                 const char      *name;
 448                 u_int            version;
 449                 const char      *features;
 450         } table[] = {
 451 #define TTY_FEATURES_BASE_MODERN_XTERM \
 452         "256,RGB,bpaste,clipboard,mouse,strikethrough,title"
 453                 { .name = "mintty",
 454                   .features = TTY_FEATURES_BASE_MODERN_XTERM
 455                               ",ccolour,cstyle,extkeys,margins,overline,usstyle"
 456                 },
 457                 { .name = "tmux",
 458                   .features = TTY_FEATURES_BASE_MODERN_XTERM
 459                               ",ccolour,cstyle,focus,overline,usstyle,hyperlinks"
 460                 },
 461                 { .name = "rxvt-unicode",
 462                   .features = "256,bpaste,ccolour,cstyle,mouse,title,ignorefkeys"
 463                 },
 464                 { .name = "iTerm2",
 465                   .features = TTY_FEATURES_BASE_MODERN_XTERM
 466                               ",cstyle,extkeys,margins,usstyle,sync,osc7,hyperlinks"
 467                 },
 468                 { .name = "XTerm",
 469                   /*
 470                    * xterm also supports DECSLRM and DECFRA, but they can be
 471                    * disabled so not set it here - they will be added if
 472                    * secondary DA shows VT420.
 473                    */
 474                   .features = TTY_FEATURES_BASE_MODERN_XTERM
 475                               ",ccolour,cstyle,extkeys,focus"
 476                 }
 477         };
 478         u_int   i;
 479
 480         for (i = 0; i < nitems(table); i++) {
 481                 if (strcmp(table[i].name, name) != 0)
 482                         continue;
 483                 if (version != 0 && version < table[i].version)
 484                         continue;
 485                 tty_add_features(feat, table[i].features, ",");
 486         }
 487 }