st.c

   1 /* See LICENSE for licence details. */
   2 #define _XOPEN_SOURCE 600
   3 #include <ctype.h>
   4 #include <errno.h>
   5 #include <fcntl.h>
   6 #include <limits.h>
   7 #include <locale.h>
   8 #include <stdarg.h>
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include <signal.h>
  13 #include <sys/ioctl.h>
  14 #include <sys/select.h>
  15 #include <sys/stat.h>
  16 #include <sys/types.h>
  17 #include <sys/wait.h>
  18 #include <unistd.h>
  19 #include <X11/Xlib.h>
  20 #include <X11/keysym.h>
  21 #include <X11/Xutil.h>
  22
  23 /* Arbitrary sizes */
  24 #define ESC_TITLE_SIZ 256
  25 #define ESC_BUF_SIZ   256
  26 #define ESC_ARG_SIZ   16
  27 #define DRAW_BUF_SIZ  1024
  28
  29 #define SERRNO strerror(errno)
  30 #define MIN(a, b)  ((a) < (b) ? (a) : (b))
  31 #define MAX(a, b)  ((a) < (b) ? (b) : (a))
  32 #define LEN(a)     (sizeof(a) / sizeof(a[0]))
  33 #define DEFAULT(a, b)     (a) = (a) ? (a) : (b)
  34 #define BETWEEN(x, a, b)  ((a) <= (x) && (x) <= (b))
  35 #define LIMIT(x, a, b)    (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
  36 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
  37 #define IS_SET(flag) (term.mode & (flag))
  38
  39 /* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
  40 enum { ATTR_NULL=0 , ATTR_REVERSE=1 , ATTR_UNDERLINE=2, ATTR_BOLD=4, ATTR_GFX=8 };
  41 enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT, CURSOR_HIDE, CURSOR_DRAW,
  42        CURSOR_SAVE, CURSOR_LOAD };
  43 enum { GLYPH_SET=1, GLYPH_DIRTY=2 };
  44 enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4 };
  45 enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
  46 enum { SCREEN_UPDATE, SCREEN_REDRAW };
  47
  48 typedef struct {
  49         char c;     /* character code  */
  50         char mode;  /* attribute flags */
  51         int fg;     /* foreground      */
  52         int bg;     /* background      */
  53         char state; /* state flags     */
  54 } Glyph;
  55
  56 typedef Glyph* Line;
  57
  58 typedef struct {
  59         Glyph attr;      /* current char attributes */
  60         int x;
  61         int y;
  62 } TCursor;
  63
  64 /* CSI Escape sequence structs */
  65 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
  66 typedef struct {
  67         char buf[ESC_BUF_SIZ]; /* raw string */
  68         int len;                           /* raw string length */
  69         char priv;
  70         int arg[ESC_ARG_SIZ];
  71         int narg;                          /* nb of args */
  72         char mode;
  73 } CSIEscape;
  74
  75 /* Internal representation of the screen */
  76 typedef struct {
  77         int row;        /* nb row */
  78         int col;        /* nb col */
  79         Line* line; /* screen */
  80         TCursor c;      /* cursor */
  81         char hidec;
  82         int top;        /* top    scroll limit */
  83         int bot;        /* bottom scroll limit */
  84         int mode;       /* terminal mode flags */
  85         int esc;        /* escape state flags */
  86         char title[ESC_TITLE_SIZ];
  87         int titlelen;
  88 } Term;
  89
  90 /* Purely graphic info */
  91 typedef struct {
  92         Display* dis;
  93         Window win;
  94         Pixmap buf;
  95         int scr;
  96         int w;  /* window width  */
  97         int h;  /* window height */
  98         int bufw; /* pixmap width  */
  99         int bufh; /* pixmap height */
 100         int ch; /* char height */
 101         int cw; /* char width  */
 102 } XWindow;
 103
 104 typedef struct {
 105         KeySym k;
 106         char s[ESC_BUF_SIZ];
 107 } Key;
 108
 109 /* Drawing Context */
 110 typedef struct {
 111         unsigned long col[256];
 112         XFontStruct* font;
 113         XFontStruct* bfont;
 114         GC gc;
 115 } DC;
 116
 117 #include "config.h"
 118
 119 static void die(const char *errstr, ...);
 120 static void draw(int);
 121 static void execsh(void);
 122 static void sigchld(int);
 123 static void run(void);
 124
 125 static void csidump(void);
 126 static void csihandle(void);
 127 static void csiparse(void);
 128 static void csireset(void);
 129
 130 static void tclearregion(int, int, int, int);
 131 static void tcursor(int);
 132 static void tdeletechar(int);
 133 static void tdeleteline(int);
 134 static void tinsertblank(int);
 135 static void tinsertblankline(int);
 136 static void tmoveto(int, int);
 137 static void tnew(int, int);
 138 static void tnewline(void);
 139 static void tputtab(void);
 140 static void tputc(char);
 141 static void tputs(char*, int);
 142 static void treset(void);
 143 static void tresize(int, int);
 144 static void tscroll(void);
 145 static void tscrollup(int);
 146 static void tscrolldown(int);
 147 static void tsetattr(int*, int);
 148 static void tsetchar(char);
 149 static void tsetscroll(int, int);
 150
 151 static void ttynew(void);
 152 static void ttyread(void);
 153 static void ttyresize(int, int);
 154 static void ttywrite(const char *, size_t);
 155
 156 static void xbell(void);
 157 static void xdraws(char *, Glyph, int, int, int);
 158 static void xhints(void);
 159 static void xclear(int, int, int, int);
 160 static void xcursor(int);
 161 static void xinit(void);
 162 static void xloadcols(void);
 163
 164 static void expose(XEvent *);
 165 static char* kmap(KeySym);
 166 static void kpress(XEvent *);
 167 static void resize(XEvent *);
 168
 169 static void (*handler[LASTEvent])(XEvent *) = {
 170         [KeyPress] = kpress,
 171         [Expose] = expose,
 172         [ConfigureNotify] = resize
 173 };
 174
 175 /* Globals */
 176 static DC dc;
 177 static XWindow xw;
 178 static Term term;
 179 static CSIEscape escseq;
 180 static int cmdfd;
 181 static pid_t pid;
 182 static int running;
 183
 184 #ifdef DEBUG
 185 void
 186 tdump(void) {
 187         int row, col;
 188         Glyph c;
 189
 190         for(row = 0; row < term.row; row++) {
 191                 for(col = 0; col < term.col; col++) {
 192                         if(col == term.c.x && row == term.c.y)
 193                                 putchar('#');
 194                         else {
 195                                 c = term.line[row][col];
 196                                 putchar(c.state & GLYPH_SET ? c.c : '.');
 197                         }
 198                 }
 199                 putchar('\n');
 200         }
 201 }
 202 #endif
 203
 204 void
 205 die(const char *errstr, ...) {
 206         va_list ap;
 207
 208         va_start(ap, errstr);
 209         vfprintf(stderr, errstr, ap);
 210         va_end(ap);
 211         exit(EXIT_FAILURE);
 212 }
 213
 214 void
 215 execsh(void) {
 216         char *args[3] = {getenv("SHELL"), "-i", NULL};
 217         DEFAULT(args[0], "/bin/sh"); /* default shell if getenv() failed */
 218         putenv("TERM=" TNAME);
 219         execvp(args[0], args);
 220 }
 221
 222 void
 223 xbell(void) { /* visual bell */
 224         XRectangle r = { BORDER, BORDER, xw.bufw, xw.bufh };
 225         XSetForeground(xw.dis, dc.gc, dc.col[BellCol]);
 226         XFillRectangles(xw.dis, xw.win, dc.gc, &r, 1);
 227         /* usleep(30000); */
 228         draw(SCREEN_REDRAW);
 229 }
 230
 231 void
 232 sigchld(int a) {
 233         int stat = 0;
 234         if(waitpid(pid, &stat, 0) < 0)
 235                 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
 236         if(WIFEXITED(stat))
 237                 exit(WEXITSTATUS(stat));
 238         else
 239                 exit(EXIT_FAILURE);
 240 }
 241
 242 void
 243 ttynew(void) {
 244         int m, s;
 245         char *pts;
 246
 247         if((m = posix_openpt(O_RDWR | O_NOCTTY)) < 0)
 248                 die("openpt failed: %s\n", SERRNO);
 249         if(grantpt(m) < 0)
 250                 die("grantpt failed: %s\n", SERRNO);
 251         if(unlockpt(m) < 0)
 252                 die("unlockpt failed: %s\n", SERRNO);
 253         if(!(pts = ptsname(m)))
 254                 die("ptsname failed: %s\n", SERRNO);
 255         if((s = open(pts, O_RDWR | O_NOCTTY)) < 0)
 256                 die("Couldn't open slave: %s\n", SERRNO);
 257         fcntl(s, F_SETFL, O_NDELAY);
 258         switch(pid = fork()) {
 259         case -1:
 260                 die("fork failed\n");
 261                 break;
 262         case 0:
 263                 setsid(); /* create a new process group */
 264                 dup2(s, STDIN_FILENO);
 265                 dup2(s, STDOUT_FILENO);
 266                 dup2(s, STDERR_FILENO);
 267                 if(ioctl(s, TIOCSCTTY, NULL) < 0)
 268                         die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
 269                 close(s);
 270                 close(m);
 271                 execsh();
 272                 break;
 273         default:
 274                 close(s);
 275                 cmdfd = m;
 276                 signal(SIGCHLD, sigchld);
 277         }
 278 }
 279
 280 void
 281 dump(char c) {
 282         static int col;
 283         fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
 284         if(++col % 10 == 0)
 285                 fprintf(stderr, "\n");
 286 }
 287
 288 void
 289 ttyread(void) {
 290         char buf[BUFSIZ] = {0};
 291         int ret;
 292
 293         if((ret = read(cmdfd, buf, BUFSIZ)) < 0)
 294                 die("Couldn't read from shell: %s\n", SERRNO);
 295         else
 296                 tputs(buf, ret);
 297 }
 298
 299 void
 300 ttywrite(const char *s, size_t n) {
 301         if(write(cmdfd, s, n) == -1)
 302                 die("write error on tty: %s\n", SERRNO);
 303 }
 304
 305 void
 306 ttyresize(int x, int y) {
 307         struct winsize w;
 308
 309         w.ws_row = term.row;
 310         w.ws_col = term.col;
 311         w.ws_xpixel = w.ws_ypixel = 0;
 312         if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
 313                 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
 314 }
 315
 316 void
 317 tcursor(int mode) {
 318         static TCursor c;
 319
 320         if(mode == CURSOR_SAVE)
 321                 c = term.c;
 322         else if(mode == CURSOR_LOAD)
 323                 term.c = c, tmoveto(c.x, c.y);
 324 }
 325
 326 void
 327 treset(void) {
 328         term.c.attr.mode = ATTR_NULL;
 329         term.c.attr.fg = DefaultFG;
 330         term.c.attr.bg = DefaultBG;
 331         term.c.x = term.c.y = 0;
 332         term.hidec = 0;
 333         term.top = 0, term.bot = term.row - 1;
 334         term.mode = MODE_WRAP;
 335         tclearregion(0, 0, term.col-1, term.row-1);
 336 }
 337
 338 void
 339 tnew(int col, int row) {
 340         /* screen size */
 341         term.row = row, term.col = col;
 342         term.top = 0, term.bot = term.row - 1;
 343         /* mode */
 344         term.mode = MODE_WRAP;
 345         /* cursor */
 346         term.c.attr.mode = ATTR_NULL;
 347         term.c.attr.fg = DefaultFG;
 348         term.c.attr.bg = DefaultBG;
 349         term.c.x = term.c.y = 0;
 350         term.hidec = 0;
 351         /* allocate screen */
 352         term.line = calloc(term.row, sizeof(Line));
 353         for(row = 0 ; row < term.row; row++)
 354                 term.line[row] = calloc(term.col, sizeof(Glyph));
 355 }
 356
 357 /* TODO: Replace with scrollup/scolldown */
 358 void
 359 tscroll(void) {
 360         Line temp = term.line[term.top];
 361         int i;
 362
 363         for(i = term.top; i < term.bot; i++)
 364                 term.line[i] = term.line[i+1];
 365         memset(temp, 0, sizeof(Glyph) * term.col);
 366         term.line[term.bot] = temp;
 367 }
 368
 369 void
 370 tscrolldown (int n) {
 371         int i;
 372         Line temp;
 373
 374         LIMIT(n, 0, term.bot-term.top+1);
 375
 376         for(i = 0; i < n; i++)
 377                 memset(term.line[term.bot-i], 0, term.col*sizeof(Glyph));
 378
 379         for(i = term.bot; i >= term.top+n; i--) {
 380                 temp = term.line[i];
 381                 term.line[i] = term.line[i-n];
 382                 term.line[i-n] = temp;
 383         }
 384 }
 385
 386 void
 387 tscrollup (int n) {
 388         int i;
 389         Line temp;
 390         LIMIT(n, 0, term.bot-term.top+1);
 391
 392         for(i = 0; i < n; i++)
 393                 memset(term.line[term.top+i], 0, term.col*sizeof(Glyph));
 394
 395          for(i = term.top; i <= term.bot-n; i++) {
 396                  temp = term.line[i];
 397                  term.line[i] = term.line[i+n];
 398                  term.line[i+n] = temp;
 399          }
 400 }
 401
 402 void
 403 tnewline(void) {
 404         int y = term.c.y + 1;
 405         if(y > term.bot)
 406                 tscroll(), y = term.bot;
 407         tmoveto(0, y);
 408 }
 409
 410 void
 411 csiparse(void) {
 412         /* int noarg = 1; */
 413         char *p = escseq.buf;
 414
 415         escseq.narg = 0;
 416         if(*p == '?')
 417                 escseq.priv = 1, p++;
 418
 419         while(p < escseq.buf+escseq.len) {
 420                 while(isdigit(*p)) {
 421                         escseq.arg[escseq.narg] *= 10;
 422                         escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
 423                 }
 424                 if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
 425                         escseq.narg++, p++;
 426                 else {
 427                         escseq.mode = *p;
 428                         escseq.narg++;
 429                         return;
 430                 }
 431         }
 432 }
 433
 434 void
 435 tmoveto(int x, int y) {
 436         term.c.x = x < 0 ? 0 : x >= term.col ? term.col-1 : x;
 437         term.c.y = y < 0 ? 0 : y >= term.row ? term.row-1 : y;
 438 }
 439
 440 void
 441 tsetchar(char c) {
 442         term.line[term.c.y][term.c.x] = term.c.attr;
 443         term.line[term.c.y][term.c.x].c = c;
 444         term.line[term.c.y][term.c.x].state |= GLYPH_SET;
 445 }
 446
 447 void
 448 tclearregion(int x1, int y1, int x2, int y2) {
 449         int y, temp;
 450
 451         if(x1 > x2)
 452                 temp = x1, x1 = x2, x2 = temp;
 453         if(y1 > y2)
 454                 temp = y1, y1 = y2, y2 = temp;
 455
 456         LIMIT(x1, 0, term.col-1);
 457         LIMIT(x2, 0, term.col-1);
 458         LIMIT(y1, 0, term.row-1);
 459         LIMIT(y2, 0, term.row-1);
 460
 461         for(y = y1; y <= y2; y++)
 462                 memset(&term.line[y][x1], 0, sizeof(Glyph)*(x2-x1+1));
 463 }
 464
 465 void
 466 tdeletechar(int n) {
 467         int src = term.c.x + n;
 468         int dst = term.c.x;
 469         int size = term.col - src;
 470
 471         if(src >= term.col) {
 472                 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
 473                 return;
 474         }
 475         memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
 476         tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
 477 }
 478
 479 void
 480 tinsertblank(int n) {
 481         int src = term.c.x;
 482         int dst = src + n;
 483         int size = term.col - dst;
 484
 485         if(dst >= term.col) {
 486                 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
 487                 return;
 488         }
 489         memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
 490         tclearregion(src, term.c.y, dst - 1, term.c.y);
 491 }
 492
 493 void
 494 tinsertblankline(int n) {
 495         int i;
 496         Line blank;
 497         int bot = term.bot;
 498
 499         if(term.c.y > term.bot)
 500                 bot = term.row - 1;
 501         else if(term.c.y < term.top)
 502                 bot = term.top - 1;
 503         if(term.c.y + n >= bot) {
 504                 tclearregion(0, term.c.y, term.col-1, bot);
 505                 return;
 506         }
 507         for(i = bot; i >= term.c.y+n; i--) {
 508                 /* swap deleted line <-> blanked line */
 509                 blank = term.line[i];
 510                 term.line[i] = term.line[i-n];
 511                 term.line[i-n] = blank;
 512                 /* blank it */
 513                 memset(blank, 0, term.col * sizeof(Glyph));
 514         }
 515 }
 516
 517 void
 518 tdeleteline(int n) {
 519         int i;
 520         Line blank;
 521         int bot = term.bot;
 522
 523         if(term.c.y > term.bot)
 524                 bot = term.row - 1;
 525         else if(term.c.y < term.top)
 526                 bot = term.top - 1;
 527         if(term.c.y + n >= bot) {
 528                 tclearregion(0, term.c.y, term.col-1, bot);
 529                 return;
 530         }
 531         for(i = term.c.y; i <= bot-n; i++) {
 532                 /* swap deleted line <-> blanked line */
 533                 blank = term.line[i];
 534                 term.line[i] = term.line[i+n];
 535                 term.line[i+n] = blank;
 536                 /* blank it */
 537                 memset(blank, 0, term.col * sizeof(Glyph));
 538         }
 539 }
 540
 541 void
 542 tsetattr(int *attr, int l) {
 543         int i;
 544
 545         for(i = 0; i < l; i++) {
 546                 switch(attr[i]) {
 547                 case 0:
 548                         term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
 549                         term.c.attr.fg = DefaultFG;
 550                         term.c.attr.bg = DefaultBG;
 551                         break;
 552                 case 1:
 553                         term.c.attr.mode |= ATTR_BOLD;
 554                         break;
 555                 case 4:
 556                         term.c.attr.mode |= ATTR_UNDERLINE;
 557                         break;
 558                 case 7:
 559                         term.c.attr.mode |= ATTR_REVERSE;
 560                         break;
 561                 case 22:
 562                         term.c.attr.mode &= ~ATTR_BOLD;
 563                         break;
 564                 case 24:
 565                         term.c.attr.mode &= ~ATTR_UNDERLINE;
 566                         break;
 567                 case 27:
 568                         term.c.attr.mode &= ~ATTR_REVERSE;
 569                         break;
 570                 case 38:
 571                         if (i + 2 < l && attr[i + 1] == 5) {
 572                                 i += 2;
 573                                 if (BETWEEN(attr[i], 0, 255))
 574                                         term.c.attr.fg = attr[i];
 575                                 else
 576                                         fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
 577                         }
 578                         else
 579                                 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
 580                         break;
 581                 case 39:
 582                         term.c.attr.fg = DefaultFG;
 583                         break;
 584                 case 48:
 585                         if (i + 2 < l && attr[i + 1] == 5) {
 586                                 i += 2;
 587                                 if (BETWEEN(attr[i], 0, 255))
 588                                         term.c.attr.bg = attr[i];
 589                                 else
 590                                         fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
 591                         }
 592                         else
 593                                 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
 594                         break;
 595                 case 49:
 596                         term.c.attr.bg = DefaultBG;
 597                         break;
 598                 default:
 599                         if(BETWEEN(attr[i], 30, 37))
 600                                 term.c.attr.fg = attr[i] - 30;
 601                         else if(BETWEEN(attr[i], 40, 47))
 602                                 term.c.attr.bg = attr[i] - 40;
 603                         else if(BETWEEN(attr[i], 90, 97))
 604                                 term.c.attr.fg = attr[i] - 90 + 8;
 605                         else if(BETWEEN(attr[i], 100, 107))
 606                                 term.c.attr.fg = attr[i] - 100 + 8;
 607                         else
 608                                 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
 609                         break;
 610                 }
 611         }
 612 }
 613
 614 void
 615 tsetscroll(int t, int b) {
 616         int temp;
 617
 618         LIMIT(t, 0, term.row-1);
 619         LIMIT(b, 0, term.row-1);
 620         if(t > b) {
 621                 temp = t;
 622                 t = b;
 623                 b = temp;
 624         }
 625         term.top = t;
 626         term.bot = b;
 627 }
 628
 629 void
 630 csihandle(void) {
 631         switch(escseq.mode) {
 632         default:
 633         unknown:
 634                 printf("erresc: unknown csi ");
 635                 csidump();
 636                 /* die(""); */
 637                 break;
 638         case '@': /* ICH -- Insert <n> blank char */
 639                 DEFAULT(escseq.arg[0], 1);
 640                 tinsertblank(escseq.arg[0]);
 641                 break;
 642         case 'A': /* CUU -- Cursor <n> Up */
 643         case 'e':
 644                 DEFAULT(escseq.arg[0], 1);
 645                 tmoveto(term.c.x, term.c.y-escseq.arg[0]);
 646                 break;
 647         case 'B': /* CUD -- Cursor <n> Down */
 648                 DEFAULT(escseq.arg[0], 1);
 649                 tmoveto(term.c.x, term.c.y+escseq.arg[0]);
 650                 break;
 651         case 'C': /* CUF -- Cursor <n> Forward */
 652         case 'a':
 653                 DEFAULT(escseq.arg[0], 1);
 654                 tmoveto(term.c.x+escseq.arg[0], term.c.y);
 655                 break;
 656         case 'D': /* CUB -- Cursor <n> Backward */
 657                 DEFAULT(escseq.arg[0], 1);
 658                 tmoveto(term.c.x-escseq.arg[0], term.c.y);
 659                 break;
 660         case 'E': /* CNL -- Cursor <n> Down and first col */
 661                 DEFAULT(escseq.arg[0], 1);
 662                 tmoveto(0, term.c.y+escseq.arg[0]);
 663                 break;
 664         case 'F': /* CPL -- Cursor <n> Up and first col */
 665                 DEFAULT(escseq.arg[0], 1);
 666                 tmoveto(0, term.c.y-escseq.arg[0]);
 667                 break;
 668         case 'G': /* CHA -- Move to <col> */
 669         case '`': /* XXX: HPA -- same? */
 670                 DEFAULT(escseq.arg[0], 1);
 671                 tmoveto(escseq.arg[0]-1, term.c.y);
 672                 break;
 673         case 'H': /* CUP -- Move to <row> <col> */
 674         case 'f': /* XXX: HVP -- same? */
 675                 DEFAULT(escseq.arg[0], 1);
 676                 DEFAULT(escseq.arg[1], 1);
 677                 tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
 678                 break;
 679         /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
 680         case 'J': /* ED -- Clear screen */
 681                 switch(escseq.arg[0]) {
 682                 case 0: /* below */
 683                         tclearregion(term.c.x, term.c.y, term.col-1, term.row-1);
 684                         break;
 685                 case 1: /* above */
 686                         tclearregion(0, 0, term.c.x, term.c.y);
 687                         break;
 688                 case 2: /* all */
 689                         tclearregion(0, 0, term.col-1, term.row-1);
 690                         break;
 691                 case 3: /* XXX: erase saved lines (xterm) */
 692                 default:
 693                         goto unknown;
 694                 }
 695                 break;
 696         case 'K': /* EL -- Clear line */
 697                 switch(escseq.arg[0]) {
 698                 case 0: /* right */
 699                         tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
 700                         break;
 701                 case 1: /* left */
 702                         tclearregion(0, term.c.y, term.c.x, term.c.y);
 703                         break;
 704                 case 2: /* all */
 705                         tclearregion(0, term.c.y, term.col-1, term.c.y);
 706                         break;
 707                 }
 708                 break;
 709         case 'S': /* SU -- Scroll <n> line up */
 710                 DEFAULT(escseq.arg[0], 1);
 711                 tscrollup(escseq.arg[0]);
 712                 break;
 713         case 'T': /* SD -- Scroll <n> line down */
 714                 DEFAULT(escseq.arg[0], 1);
 715                 tscrolldown(escseq.arg[0]);
 716                 break;
 717         case 'L': /* IL -- Insert <n> blank lines */
 718                 DEFAULT(escseq.arg[0], 1);
 719                 tinsertblankline(escseq.arg[0]);
 720                 break;
 721         case 'l': /* RM -- Reset Mode */
 722                 if(escseq.priv) {
 723                         switch(escseq.arg[0]) {
 724                         case 1:
 725                                 term.mode &= ~MODE_APPKEYPAD;
 726                                 break;
 727                         case 7:
 728                                 term.mode &= ~MODE_WRAP;
 729                                 break;
 730                         case 12: /* att610 -- Stop blinking cursor (IGNORED) */
 731                                 break;
 732                         case 25:
 733                                 term.hidec = 1;
 734                                 break;
 735                         case 1048: /* XXX: no alt. screen to erase/save */
 736                         case 1049:
 737                                 tcursor(CURSOR_LOAD);
 738                                 tclearregion(0, 0, term.col-1, term.row-1);
 739                                 break;
 740                         default:
 741                                 goto unknown;
 742                         }
 743                 } else {
 744                         switch(escseq.arg[0]) {
 745                         case 4:
 746                                 term.mode &= ~MODE_INSERT;
 747                                 break;
 748                         default:
 749                                 goto unknown;
 750                         }
 751                 }
 752                 break;
 753         case 'M': /* DL -- Delete <n> lines */
 754                 DEFAULT(escseq.arg[0], 1);
 755                 tdeleteline(escseq.arg[0]);
 756                 break;
 757         case 'X': /* ECH -- Erase <n> char */
 758                 DEFAULT(escseq.arg[0], 1);
 759                 tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
 760                 break;
 761         case 'P': /* DCH -- Delete <n> char */
 762                 DEFAULT(escseq.arg[0], 1);
 763                 tdeletechar(escseq.arg[0]);
 764                 break;
 765         /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
 766         case 'd': /* VPA -- Move to <row> */
 767                 DEFAULT(escseq.arg[0], 1);
 768                 tmoveto(term.c.x, escseq.arg[0]-1);
 769                 break;
 770         case 'h': /* SM -- Set terminal mode */
 771                 if(escseq.priv) {
 772                         switch(escseq.arg[0]) {
 773                         case 1:
 774                                 term.mode |= MODE_APPKEYPAD;
 775                                 break;
 776                         case 7:
 777                                 term.mode |= MODE_WRAP;
 778                                 break;
 779                         case 12: /* att610 -- Start blinking cursor (IGNORED) */
 780                                 break;
 781                         case 25:
 782                                 term.hidec = 0;
 783                                 break;
 784                         case 1048:
 785                         case 1049: /* XXX: no alt. screen to erase/save */
 786                                 tcursor(CURSOR_SAVE);
 787                                 tclearregion(0, 0, term.col-1, term.row-1);
 788                                 break;
 789                         default: goto unknown;
 790                         }
 791                 } else {
 792                         switch(escseq.arg[0]) {
 793                         case 4:
 794                                 term.mode |= MODE_INSERT;
 795                                 break;
 796                         default: goto unknown;
 797                         }
 798                 };
 799                 break;
 800         case 'm': /* SGR -- Terminal attribute (color) */
 801                 tsetattr(escseq.arg, escseq.narg);
 802                 break;
 803         case 'r': /* DECSTBM -- Set Scrolling Region */
 804                 if(escseq.priv)
 805                         goto unknown;
 806                 else {
 807                         DEFAULT(escseq.arg[0], 1);
 808                         DEFAULT(escseq.arg[1], term.row);
 809                         tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
 810                 }
 811                 break;
 812         case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
 813                 tcursor(CURSOR_SAVE);
 814                 break;
 815         case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
 816                 tcursor(CURSOR_LOAD);
 817                 break;
 818         }
 819 }
 820
 821 void
 822 csidump(void) {
 823         int i;
 824         printf("ESC [ %s", escseq.priv ? "? " : "");
 825         if(escseq.narg)
 826                 for(i = 0; i < escseq.narg; i++)
 827                         printf("%d ", escseq.arg[i]);
 828         if(escseq.mode)
 829                 putchar(escseq.mode);
 830         putchar('\n');
 831 }
 832
 833 void
 834 csireset(void) {
 835         memset(&escseq, 0, sizeof(escseq));
 836 }
 837
 838 void
 839 tputtab(void) {
 840         int space = TAB - term.c.x % TAB;
 841         tmoveto(term.c.x + space, term.c.y);
 842 }
 843
 844 void
 845 tputc(char c) {
 846         if(term.esc & ESC_START) {
 847                 if(term.esc & ESC_CSI) {
 848                         escseq.buf[escseq.len++] = c;
 849                         if(BETWEEN(c, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
 850                                 term.esc = 0;
 851                                 csiparse(), csihandle();
 852                         }
 853                 } else if(term.esc & ESC_OSC) {
 854                         if(c == ';') {
 855                                 term.titlelen = 0;
 856                                 term.esc = ESC_START | ESC_TITLE;
 857                         }
 858                 } else if(term.esc & ESC_TITLE) {
 859                         if(c == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
 860                                 term.esc = 0;
 861                                 term.title[term.titlelen] = '\0';
 862                                 XStoreName(xw.dis, xw.win, term.title);
 863                         } else {
 864                                 term.title[term.titlelen++] = c;
 865                         }
 866                 } else if(term.esc & ESC_ALTCHARSET) {
 867                         switch(c) {
 868                         case '0': /* Line drawing crap */
 869                                 term.c.attr.mode |= ATTR_GFX;
 870                                 break;
 871                         case 'B': /* Back to regular text */
 872                                 term.c.attr.mode &= ~ATTR_GFX;
 873                                 break;
 874                         default:
 875                                 printf("esc unhandled charset: ESC ( %c\n", c);
 876                         }
 877                         term.esc = 0;
 878                 } else {
 879                         switch(c) {
 880                         case '[':
 881                                 term.esc |= ESC_CSI;
 882                                 break;
 883                         case ']':
 884                                 term.esc |= ESC_OSC;
 885                                 break;
 886                         case '(':
 887                                 term.esc |= ESC_ALTCHARSET;
 888                                 break;
 889                         case 'A':
 890                                 tmoveto(term.c.x, term.c.y-1);
 891                                 term.esc = 0;
 892                                 break;
 893                         case 'B':
 894                                 tmoveto(term.c.x, term.c.y+1);
 895                                 term.esc = 0;
 896                                 break;
 897                         case 'C':
 898                                 tmoveto(term.c.x+1, term.c.y);
 899                                 term.esc = 0;
 900                                 break;
 901                         case 'D': /* XXX: CUP (VT100) or IND (VT52) ... */
 902                                 tmoveto(term.c.x-1, term.c.y);
 903                                 term.esc = 0;
 904                                 break;
 905                         case 'E': /* NEL -- Next line */
 906                                 tnewline();
 907                                 term.esc = 0;
 908                                 break;
 909                         case 'M': /* RI -- Reverse index */
 910                                 if(term.c.y == term.top)
 911                                         tscrolldown(1);
 912                                 else
 913                                         tmoveto(term.c.x, term.c.y-1);
 914                                 term.esc = 0;
 915                                 break;
 916                         case 'c': /* RIS -- Reset to inital state */
 917                                 treset();
 918                                 term.esc = 0;
 919                                 break;
 920                         case '=': /* DECPAM */
 921                                 term.mode |= MODE_APPKEYPAD;
 922                                 term.esc = 0;
 923                                 break;
 924                         case '>': /* DECPNM */
 925                                 term.mode &= ~MODE_APPKEYPAD;
 926                                 term.esc = 0;
 927                                 break;
 928                         case '7':
 929                                 tcursor(CURSOR_SAVE);
 930                                 term.esc = 0;
 931                                 break;
 932                         case '8':
 933                                 tcursor(CURSOR_LOAD);
 934                                 term.esc = 0;
 935                                 break;
 936                         default:
 937                                 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n", c, isprint(c)?c:'.');
 938                                 term.esc = 0;
 939                         }
 940                 }
 941         } else {
 942                 switch(c) {
 943                 case '\t':
 944                         tputtab();
 945                         break;
 946                 case '\b':
 947                         tmoveto(term.c.x-1, term.c.y);
 948                         break;
 949                 case '\r':
 950                         tmoveto(0, term.c.y);
 951                         break;
 952                 case '\n':
 953                         tnewline();
 954                         break;
 955                 case '\a':
 956                         xbell();
 957                         break;
 958                 case '\033':
 959                         csireset();
 960                         term.esc = ESC_START;
 961                         break;
 962                 default:
 963                         tsetchar(c);
 964                         if(term.c.x+1 < term.col) {
 965                                 tmoveto(term.c.x+1, term.c.y);
 966                         } else if(IS_SET(MODE_WRAP))
 967                                 tnewline();
 968                         break;
 969                 }
 970         }
 971 }
 972
 973 void
 974 tputs(char *s, int len) {
 975         for(; len > 0; len--)
 976                 tputc(*s++);
 977 }
 978
 979 void
 980 tresize(int col, int row) {
 981         int i;
 982         int minrow = MIN(row, term.row);
 983         int mincol = MIN(col, term.col);
 984
 985         if(col < 1 || row < 1)
 986                 return;
 987
 988         /* free uneeded rows */
 989         for(i = row; i < term.row; i++)
 990                 free(term.line[i]);
 991
 992         /* resize to new height */
 993         term.line = realloc(term.line, row * sizeof(Line));
 994
 995         /* resize each row to new width, zero-pad if needed */
 996         for(i = 0; i < minrow; i++) {
 997                 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
 998                 memset(term.line[i] + mincol, 0, (col - mincol) * sizeof(Glyph));
 999         }
1000
1001         /* allocate any new rows */
1002         for(/* i == minrow */; i < row; i++)
1003                 term.line[i] = calloc(col, sizeof(Glyph));
1004
1005         LIMIT(term.c.x, 0, col-1);
1006         LIMIT(term.c.y, 0, row-1);
1007         LIMIT(term.top, 0, row-1);
1008         LIMIT(term.bot, 0, row-1);
1009
1010         term.bot = row-1;
1011         term.col = col, term.row = row;
1012 }
1013
1014 void
1015 xloadcols(void) {
1016         int i, r, g, b;
1017         XColor color;
1018         Colormap cmap = DefaultColormap(xw.dis, xw.scr);
1019         unsigned long white = WhitePixel(xw.dis, xw.scr);
1020
1021         for(i = 0; i < 16; i++) {
1022                 if (!XAllocNamedColor(xw.dis, cmap, colorname[i], &color, &color)) {
1023                         dc.col[i] = white;
1024                         fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1025                 } else
1026                         dc.col[i] = color.pixel;
1027         }
1028
1029         /* same colors as xterm */
1030         for(r = 0; r < 6; r++)
1031                 for(g = 0; g < 6; g++)
1032                         for(b = 0; b < 6; b++) {
1033                                 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1034                                 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1035                                 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1036                                 if (!XAllocColor(xw.dis, cmap, &color)) {
1037                                         dc.col[i] = white;
1038                                         fprintf(stderr, "Could not allocate color %d\n", i);
1039                                 } else
1040                                         dc.col[i] = color.pixel;
1041                                 i++;
1042                         }
1043
1044         for(r = 0; r < 24; r++, i++) {
1045                 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1046                 if (!XAllocColor(xw.dis, cmap, &color)) {
1047                         dc.col[i] = white;
1048                         fprintf(stderr, "Could not allocate color %d\n", i);
1049                 } else
1050                         dc.col[i] = color.pixel;
1051         }
1052 }
1053
1054 void
1055 xclear(int x1, int y1, int x2, int y2) {
1056         XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1057         XFillRectangle(xw.dis, xw.buf, dc.gc,
1058                        x1 * xw.cw, y1 * xw.ch,
1059                        (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1060 }
1061
1062 void
1063 xhints(void)
1064 {
1065         XClassHint class = {TNAME, TNAME};
1066         XWMHints wm = {.flags = InputHint, .input = 1};
1067         XSizeHints size = {
1068                 .flags = PSize | PResizeInc | PBaseSize,
1069                 .height = xw.h,
1070                 .width = xw.w,
1071                 .height_inc = xw.ch,
1072                 .width_inc = xw.cw,
1073                 .base_height = 2*BORDER,
1074                 .base_width = 2*BORDER,
1075         };
1076         XSetWMProperties(xw.dis, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1077 }
1078
1079 void
1080 xinit(void) {
1081         if(!(xw.dis = XOpenDisplay(NULL)))
1082                 die("Can't open display\n");
1083         xw.scr = XDefaultScreen(xw.dis);
1084
1085         /* font */
1086         if(!(dc.font = XLoadQueryFont(xw.dis, FONT)) || !(dc.bfont = XLoadQueryFont(xw.dis, BOLDFONT)))
1087                 die("Can't load font %s\n", dc.font ? BOLDFONT : FONT);
1088
1089         /* XXX: Assuming same size for bold font */
1090         xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing;
1091         xw.ch = dc.font->ascent + dc.font->descent;
1092
1093         /* colors */
1094         xloadcols();
1095
1096         term.c.attr.fg = DefaultFG;
1097         term.c.attr.bg = DefaultBG;
1098         term.c.attr.mode = ATTR_NULL;
1099         /* windows */
1100         xw.h = term.row * xw.ch + 2*BORDER;
1101         xw.w = term.col * xw.cw + 2*BORDER;
1102         xw.win = XCreateSimpleWindow(xw.dis, XRootWindow(xw.dis, xw.scr), 0, 0,
1103                         xw.w, xw.h, 0,
1104                         dc.col[DefaultBG],
1105                         dc.col[DefaultBG]);
1106         xw.bufw = xw.w - 2*BORDER;
1107         xw.bufh = xw.h - 2*BORDER;
1108         xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1109         /* gc */
1110         dc.gc = XCreateGC(xw.dis, xw.win, 0, NULL);
1111         XMapWindow(xw.dis, xw.win);
1112         xhints();
1113         XStoreName(xw.dis, xw.win, "st");
1114         XSync(xw.dis, 0);
1115 }
1116
1117 void
1118 xdraws(char *s, Glyph base, int x, int y, int len) {
1119         unsigned long xfg, xbg;
1120         int winx = x*xw.cw, winy = y*xw.ch + dc.font->ascent, width = len*xw.cw;
1121         int i;
1122
1123         if(base.mode & ATTR_REVERSE)
1124                 xfg = dc.col[base.bg], xbg = dc.col[base.fg];
1125         else
1126                 xfg = dc.col[base.fg], xbg = dc.col[base.bg];
1127
1128         XSetBackground(xw.dis, dc.gc, xbg);
1129         XSetForeground(xw.dis, dc.gc, xfg);
1130
1131         if(base.mode & ATTR_GFX)
1132                 for(i = 0; i < len; i++)
1133                         s[i] = gfx[(int)s[i]];
1134
1135         XSetFont(xw.dis, dc.gc, base.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1136         XDrawImageString(xw.dis, xw.buf, dc.gc, winx, winy, s, len);
1137
1138         if(base.mode & ATTR_UNDERLINE)
1139                 XDrawLine(xw.dis, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1140 }
1141
1142 void
1143 xcursor(int mode) {
1144         static int oldx = 0;
1145         static int oldy = 0;
1146         Glyph g = {' ', ATTR_NULL, DefaultBG, DefaultCS, 0};
1147
1148         LIMIT(oldx, 0, term.col-1);
1149         LIMIT(oldy, 0, term.row-1);
1150
1151         if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
1152                 g.c = term.line[term.c.y][term.c.x].c;
1153
1154         /* remove the old cursor */
1155         if(term.line[oldy][oldx].state & GLYPH_SET)
1156                 xdraws(&term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1);
1157         else
1158                 xclear(oldx, oldy, oldx, oldy);
1159
1160         /* draw the new one */
1161         if(mode == CURSOR_DRAW) {
1162                 xdraws(&g.c, g, term.c.x, term.c.y, 1);
1163                 oldx = term.c.x, oldy = term.c.y;
1164         }
1165 }
1166
1167 #ifdef DEBUG
1168 /* basic drawing routines */
1169 void
1170 xdrawc(int x, int y, Glyph g) {
1171         XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
1172         XSetBackground(xw.dis, dc.gc, dc.col[g.bg]);
1173         XSetForeground(xw.dis, dc.gc, dc.col[g.fg]);
1174         XSetFont(xw.dis, dc.gc, g.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1175         XDrawImageString(xw.dis, xw.buf, dc.gc, r.x, r.y+dc.font->ascent, &g.c, 1);
1176 }
1177
1178 void
1179 draw(int dummy) {
1180         int x, y;
1181
1182         xclear(0, 0, term.col-1, term.row-1);
1183         for(y = 0; y < term.row; y++)
1184                 for(x = 0; x < term.col; x++)
1185                         if(term.line[y][x].state & GLYPH_SET)
1186                                 xdrawc(x, y, term.line[y][x]);
1187
1188         if(!term.hidec)
1189                 xcursor(CURSOR_DRAW);
1190         XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1191         XFlush(xw.dis);
1192 }
1193
1194 #else
1195 /* optimized drawing routine */
1196 void
1197 draw(int redraw_all) {
1198         int i, x, y, ox;
1199         Glyph base, new;
1200         char buf[DRAW_BUF_SIZ];
1201
1202         XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1203         XFillRectangle(xw.dis, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
1204         for(y = 0; y < term.row; y++) {
1205                 base = term.line[y][0];
1206                 i = ox = 0;
1207                 for(x = 0; x < term.col; x++) {
1208                         new = term.line[y][x];
1209                         if(!ATTRCMP(base, new) && i < DRAW_BUF_SIZ)
1210                                 buf[i++] = new.c;
1211                         else {
1212                                 xdraws(buf, base, ox, y, i);
1213                                 buf[0] = new.c;
1214                                 i = 1;
1215                                 ox = x;
1216                                 base = new;
1217                         }
1218                 }
1219                 xdraws(buf, base, ox, y, i);
1220         }
1221         xcursor(term.hidec ? CURSOR_HIDE : CURSOR_DRAW);
1222         XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1223         XFlush(xw.dis);
1224 }
1225
1226 #endif
1227
1228 void
1229 expose(XEvent *ev) {
1230         draw(SCREEN_REDRAW);
1231 }
1232
1233 char*
1234 kmap(KeySym k) {
1235         int i;
1236         for(i = 0; i < LEN(key); i++)
1237                 if(key[i].k == k)
1238                         return (char*)key[i].s;
1239         return NULL;
1240 }
1241
1242 void
1243 kpress(XEvent *ev) {
1244         XKeyEvent *e = &ev->xkey;
1245         KeySym ksym;
1246         char buf[32];
1247         char *customkey;
1248         int len;
1249         int meta;
1250         int shift;
1251
1252         meta = e->state & Mod1Mask;
1253         shift = e->state & ShiftMask;
1254         len = XLookupString(e, buf, sizeof(buf), &ksym, NULL);
1255
1256         if((customkey = kmap(ksym)))
1257                 ttywrite(customkey, strlen(customkey));
1258         else if(len > 0) {
1259                 buf[sizeof(buf)-1] = '\0';
1260                 if(meta && len == 1)
1261                         ttywrite("\033", 1);
1262                 ttywrite(buf, len);
1263         } else
1264                 switch(ksym) {
1265                 case XK_Up:
1266                 case XK_Down:
1267                 case XK_Left:
1268                 case XK_Right:
1269                         sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', "DACB"[ksym - XK_Left]);
1270                         ttywrite(buf, 3);
1271                         break;
1272                 case XK_Insert:
1273                         if(shift)
1274                                 draw(1), puts("draw!")/* XXX: paste X clipboard */;
1275                         break;
1276                 default:
1277                         fprintf(stderr, "errkey: %d\n", (int)ksym);
1278                         break;
1279                 }
1280 }
1281
1282 void
1283 resize(XEvent *e) {
1284         int col, row;
1285
1286         if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
1287                 return;
1288
1289         xw.w = e->xconfigure.width;
1290         xw.h = e->xconfigure.height;
1291         xw.bufw = xw.w - 2*BORDER;
1292         xw.bufh = xw.h - 2*BORDER;
1293         col = xw.bufw / xw.cw;
1294         row = xw.bufh / xw.ch;
1295         tresize(col, row);
1296         ttyresize(col, row);
1297         XFreePixmap(xw.dis, xw.buf);
1298         xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1299         draw(SCREEN_REDRAW);
1300 }
1301
1302 void
1303 run(void) {
1304         XEvent ev;
1305         fd_set rfd;
1306         int xfd = XConnectionNumber(xw.dis);
1307
1308         running = 1;
1309         XSelectInput(xw.dis, xw.win, ExposureMask | KeyPressMask | StructureNotifyMask);
1310         XResizeWindow(xw.dis, xw.win, xw.w, xw.h); /* XXX: fix resize bug in wmii (?) */
1311
1312         while(running) {
1313                 FD_ZERO(&rfd);
1314                 FD_SET(cmdfd, &rfd);
1315                 FD_SET(xfd, &rfd);
1316                 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) == -1) {
1317                         if(errno == EINTR)
1318                                 continue;
1319                         die("select failed: %s\n", SERRNO);
1320                 }
1321                 if(FD_ISSET(cmdfd, &rfd)) {
1322                         ttyread();
1323                         draw(SCREEN_UPDATE);
1324                 }
1325                 while(XPending(xw.dis)) {
1326                         XNextEvent(xw.dis, &ev);
1327                         if(handler[ev.type])
1328                                 (handler[ev.type])(&ev);
1329                 }
1330         }
1331 }
1332
1333 int
1334 main(int argc, char *argv[]) {
1335         if(argc == 2 && !strncmp("-v", argv[1], 3))
1336                 die("st-" VERSION ", (c) 2010 st engineers\n");
1337         else if(argc != 1)
1338                 die("usage: st [-v]\n");
1339         setlocale(LC_CTYPE, "");
1340         tnew(80, 24);
1341         ttynew();
1342         xinit();
1343         run();
1344         return 0;
1345 }