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
  38 /* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
  39 enum { ATTR_NULL=0 , ATTR_REVERSE=1 , ATTR_UNDERLINE=2, ATTR_BOLD=4, ATTR_GFX=8 };
  40 enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT, CURSOR_HIDE, CURSOR_DRAW,
  41        CURSOR_SAVE, CURSOR_LOAD };
  42 enum { GLYPH_SET=1, GLYPH_DIRTY=2 };
  43 enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4 };
  44 enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
  45 enum { SCREEN_UPDATE, SCREEN_REDRAW };
  46
  47 typedef struct {
  48         char c;     /* character code  */
  49         char mode;  /* attribute flags */
  50         int fg;     /* foreground      */
  51         int bg;     /* background      */
  52         char state; /* state flags     */
  53 } Glyph;
  54
  55 typedef Glyph* Line;
  56
  57 typedef struct {
  58         Glyph attr;      /* current char attributes */
  59         int x;
  60         int y;
  61 } TCursor;
  62
  63 /* CSI Escape sequence structs */
  64 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
  65 typedef struct {
  66         char buf[ESC_BUF_SIZ]; /* raw string */
  67         int len;                           /* raw string length */
  68         char priv;
  69         int arg[ESC_ARG_SIZ];
  70         int narg;                          /* nb of args */
  71         char mode;
  72 } CSIEscape;
  73
  74 /* Internal representation of the screen */
  75 typedef struct {
  76         int row;        /* nb row */
  77         int col;        /* nb col */
  78         Line* line; /* screen */
  79         TCursor c;      /* cursor */
  80         char hidec;
  81         int top;        /* top    scroll limit */
  82         int bot;        /* bottom scroll limit */
  83         int mode;       /* terminal mode flags */
  84         int esc;        /* escape state flags */
  85         char title[ESC_TITLE_SIZ];
  86         int titlelen;
  87 } Term;
  88
  89 /* Purely graphic info */
  90 typedef struct {
  91         Display* dis;
  92         Window win;
  93         Pixmap buf;
  94         int scr;
  95         int w;  /* window width  */
  96         int h;  /* window height */
  97         int bufw; /* pixmap width  */
  98         int bufh; /* pixmap height */
  99         int ch; /* char height */
 100         int cw; /* char width  */
 101 } XWindow;
 102
 103 typedef struct {
 104         KeySym k;
 105         char s[ESC_BUF_SIZ];
 106 } Key;
 107
 108 /* Drawing Context */
 109 typedef struct {
 110         unsigned long col[256];
 111         XFontStruct* font;
 112         XFontStruct* bfont;
 113         GC gc;
 114 } DC;
 115
 116 #include "config.h"
 117
 118 static void die(const char *errstr, ...);
 119 static void draw(int);
 120 static void execsh(void);
 121 static void sigchld(int);
 122 static void run(void);
 123
 124 static void csidump(void);
 125 static void csihandle(void);
 126 static void csiparse(void);
 127 static void csireset(void);
 128
 129 static void tclearregion(int, int, int, int);
 130 static void tcursor(int);
 131 static void tmovecursor(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("grandpt 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 TTIOCSTTY failed: %s\n", SERRNO);
 269                 execsh();
 270                 break;
 271         default:
 272                 close(s);
 273                 cmdfd = m;
 274                 signal(SIGCHLD, sigchld);
 275         }
 276 }
 277
 278 void
 279 dump(char c) {
 280         static int col;
 281         fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
 282         if(++col % 10 == 0)
 283                 fprintf(stderr, "\n");
 284 }
 285
 286 void
 287 ttyread(void) {
 288         char buf[BUFSIZ] = {0};
 289         int ret;
 290
 291         if((ret = read(cmdfd, buf, BUFSIZ)) < 0)
 292                 die("Couldn't read from shell: %s\n", SERRNO);
 293         else
 294                 tputs(buf, ret);
 295 }
 296
 297 void
 298 ttywrite(const char *s, size_t n) {
 299         if(write(cmdfd, s, n) == -1)
 300                 die("write error on tty: %s\n", SERRNO);
 301 }
 302
 303 void
 304 ttyresize(int x, int y) {
 305         struct winsize w;
 306
 307         w.ws_row = term.row;
 308         w.ws_col = term.col;
 309         w.ws_xpixel = w.ws_ypixel = 0;
 310         if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
 311                 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
 312 }
 313
 314 void
 315 tcursor(int mode) {
 316         static TCursor c;
 317
 318         if(mode == CURSOR_SAVE)
 319                 c = term.c;
 320         else if(mode == CURSOR_LOAD)
 321                 term.c = c, tmoveto(c.x, c.y);
 322 }
 323
 324 void
 325 treset(void) {
 326         term.c.attr.mode = ATTR_NULL;
 327         term.c.attr.fg = DefaultFG;
 328         term.c.attr.bg = DefaultBG;
 329         term.c.x = term.c.y = 0;
 330         term.hidec = 0;
 331         term.top = 0, term.bot = term.row - 1;
 332         term.mode = MODE_WRAP;
 333         tclearregion(0, 0, term.col-1, term.row-1);
 334 }
 335
 336 void
 337 tnew(int col, int row) {   /* screen size */
 338         term.row = row, term.col = col;
 339         term.top = 0, term.bot = term.row - 1;
 340         /* mode */
 341         term.mode = MODE_WRAP;
 342         /* cursor */
 343         term.c.attr.mode = ATTR_NULL;
 344         term.c.attr.fg = DefaultFG;
 345         term.c.attr.bg = DefaultBG;
 346         term.c.x = term.c.y = 0;
 347         term.hidec = 0;
 348         /* allocate screen */
 349         term.line = calloc(term.row, sizeof(Line));
 350         for(row = 0 ; row < term.row; row++)
 351                 term.line[row] = calloc(term.col, sizeof(Glyph));
 352 }
 353
 354 /* TODO: Replace with scrollup/scolldown */
 355 void
 356 tscroll(void) {
 357         Line temp = term.line[term.top];
 358         int i;
 359
 360         for(i = term.top; i < term.bot; i++)
 361                 term.line[i] = term.line[i+1];
 362         memset(temp, 0, sizeof(Glyph) * term.col);
 363         term.line[term.bot] = temp;
 364 }
 365
 366 void
 367 tscrolldown (int n) {
 368         int i;
 369         Line temp;
 370
 371         LIMIT(n, 0, term.bot-term.top+1);
 372
 373         for(i = 0; i < n; i++)
 374                 memset(term.line[term.bot-i], 0, term.col*sizeof(Glyph));
 375
 376         for(i = term.bot; i >= term.top+n; i--) {
 377                 temp = term.line[i];
 378                 term.line[i] = term.line[i-n];
 379                 term.line[i-n] = temp;
 380         }
 381 }
 382
 383 void
 384 tscrollup (int n) {
 385         int i;
 386         Line temp;
 387         LIMIT(n, 0, term.bot-term.top+1);
 388
 389         for(i = 0; i < n; i++)
 390                 memset(term.line[term.top+i], 0, term.col*sizeof(Glyph));
 391
 392          for(i = term.top; i <= term.bot-n; i++) {
 393                  temp = term.line[i];
 394                  term.line[i] = term.line[i+n];
 395                  term.line[i+n] = temp;
 396          }
 397 }
 398
 399 void
 400 tnewline(void) {
 401         int y = term.c.y + 1;
 402         if(y > term.bot)
 403                 tscroll(), y = term.bot;
 404         tmoveto(0, y);
 405 }
 406
 407 void
 408 csiparse(void) {
 409         /* int noarg = 1; */
 410         char *p = escseq.buf;
 411
 412         escseq.narg = 0;
 413         if(*p == '?')
 414                 escseq.priv = 1, p++;
 415
 416         while(p < escseq.buf+escseq.len) {
 417                 while(isdigit(*p)) {
 418                         escseq.arg[escseq.narg] *= 10;
 419                         escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
 420                 }
 421                 if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
 422                         escseq.narg++, p++;
 423                 else {
 424                         escseq.mode = *p;
 425                         escseq.narg++;
 426                         return;
 427                 }
 428         }
 429 }
 430
 431 void
 432 tmoveto(int x, int y) {
 433         term.c.x = x < 0 ? 0 : x >= term.col ? term.col-1 : x;
 434         term.c.y = y < 0 ? 0 : y >= term.row ? term.row-1 : y;
 435 }
 436
 437 void
 438 tmovecursor(int dir) {
 439         int xf = term.c.x, yf = term.c.y;
 440
 441         switch(dir) {
 442         case CURSOR_UP:
 443                 yf--;
 444                 break;
 445         case CURSOR_DOWN:
 446                 yf++;
 447                 break;
 448         case CURSOR_LEFT:
 449                 xf--;
 450                 break;
 451         case CURSOR_RIGHT:
 452                 xf++;
 453                 if(term.mode & MODE_WRAP && xf >= term.col) {
 454                         xf = 0, yf++;
 455                         if(yf > term.bot)
 456                                 yf = term.bot, tscroll();
 457                 }
 458                 break;
 459         }
 460         tmoveto(xf, yf);
 461 }
 462
 463 void
 464 tsetchar(char c) {
 465         term.line[term.c.y][term.c.x] = term.c.attr;
 466         term.line[term.c.y][term.c.x].c = c;
 467         term.line[term.c.y][term.c.x].state |= GLYPH_SET;
 468 }
 469
 470 void
 471 tclearregion(int x1, int y1, int x2, int y2) {
 472         int y, temp;
 473
 474         if(x1 > x2)
 475                 temp = x1, x1 = x2, x2 = temp;
 476         if(y1 > y2)
 477                 temp = y1, y1 = y2, y2 = temp;
 478
 479         LIMIT(x1, 0, term.col-1);
 480         LIMIT(x2, 0, term.col-1);
 481         LIMIT(y1, 0, term.row-1);
 482         LIMIT(y2, 0, term.row-1);
 483
 484         for(y = y1; y <= y2; y++)
 485                 memset(&term.line[y][x1], 0, sizeof(Glyph)*(x2-x1+1));
 486 }
 487
 488 void
 489 tdeletechar(int n) {
 490         int src = term.c.x + n;
 491         int dst = term.c.x;
 492         int size = term.col - src;
 493
 494         if(src >= term.col) {
 495                 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
 496                 return;
 497         }
 498         memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
 499         tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
 500 }
 501
 502 void
 503 tinsertblank(int n) {
 504         int src = term.c.x;
 505         int dst = src + n;
 506         int size = term.col - dst;
 507
 508         if(dst >= term.col) {
 509                 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
 510                 return;
 511         }
 512         memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
 513         tclearregion(src, term.c.y, dst - 1, term.c.y);
 514 }
 515
 516 void
 517 tinsertblankline(int n) {
 518         int i;
 519         Line blank;
 520         int bot = term.bot;
 521
 522         if(term.c.y > term.bot)
 523                 bot = term.row - 1;
 524         else if(term.c.y < term.top)
 525                 bot = term.top - 1;
 526         if(term.c.y + n >= bot) {
 527                 tclearregion(0, term.c.y, term.col-1, bot);
 528                 return;
 529         }
 530         for(i = bot; i >= term.c.y+n; i--) {
 531                 /* swap deleted line <-> blanked line */
 532                 blank = term.line[i];
 533                 term.line[i] = term.line[i-n];
 534                 term.line[i-n] = blank;
 535                 /* blank it */
 536                 memset(blank, 0, term.col * sizeof(Glyph));
 537         }
 538 }
 539
 540 void
 541 tdeleteline(int n) {
 542         int i;
 543         Line blank;
 544         int bot = term.bot;
 545
 546         if(term.c.y > term.bot)
 547                 bot = term.row - 1;
 548         else if(term.c.y < term.top)
 549                 bot = term.top - 1;
 550         if(term.c.y + n >= bot) {
 551                 tclearregion(0, term.c.y, term.col-1, bot);
 552                 return;
 553         }
 554         for(i = term.c.y; i <= bot-n; i++) {
 555                 /* swap deleted line <-> blanked line */
 556                 blank = term.line[i];
 557                 term.line[i] = term.line[i+n];
 558                 term.line[i+n] = blank;
 559                 /* blank it */
 560                 memset(blank, 0, term.col * sizeof(Glyph));
 561         }
 562 }
 563
 564 void
 565 tsetattr(int *attr, int l) {
 566         int i;
 567
 568         for(i = 0; i < l; i++) {
 569                 switch(attr[i]) {
 570                 case 0:
 571                         term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
 572                         term.c.attr.fg = DefaultFG;
 573                         term.c.attr.bg = DefaultBG;
 574                         break;
 575                 case 1:
 576                         term.c.attr.mode |= ATTR_BOLD;
 577                         break;
 578                 case 4:
 579                         term.c.attr.mode |= ATTR_UNDERLINE;
 580                         break;
 581                 case 7:
 582                         term.c.attr.mode |= ATTR_REVERSE;
 583                         break;
 584                 case 22:
 585                         term.c.attr.mode &= ~ATTR_BOLD;
 586                         break;
 587                 case 24:
 588                         term.c.attr.mode &= ~ATTR_UNDERLINE;
 589                         break;
 590                 case 27:
 591                         term.c.attr.mode &= ~ATTR_REVERSE;
 592                         break;
 593                 case 38:
 594                         if (i + 2 < l && attr[i + 1] == 5) {
 595                                 i += 2;
 596                                 if (BETWEEN(attr[i], 0, 255))
 597                                         term.c.attr.fg = attr[i];
 598                                 else
 599                                         fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
 600                         }
 601                         else
 602                                 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
 603                         break;
 604                 case 39:
 605                         term.c.attr.fg = DefaultFG;
 606                         break;
 607                 case 48:
 608                         if (i + 2 < l && attr[i + 1] == 5) {
 609                                 i += 2;
 610                                 if (BETWEEN(attr[i], 0, 255))
 611                                         term.c.attr.bg = attr[i];
 612                                 else
 613                                         fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
 614                         }
 615                         else
 616                                 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
 617                         break;
 618                 case 49:
 619                         term.c.attr.bg = DefaultBG;
 620                         break;
 621                 default:
 622                         if(BETWEEN(attr[i], 30, 37))
 623                                 term.c.attr.fg = attr[i] - 30;
 624                         else if(BETWEEN(attr[i], 40, 47))
 625                                 term.c.attr.bg = attr[i] - 40;
 626                         else if(BETWEEN(attr[i], 90, 97))
 627                                 term.c.attr.fg = attr[i] - 90 + 8;
 628                         else if(BETWEEN(attr[i], 100, 107))
 629                                 term.c.attr.fg = attr[i] - 100 + 8;
 630                         else
 631                                 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
 632                         break;
 633                 }
 634         }
 635 }
 636
 637 void
 638 tsetscroll(int t, int b) {
 639         int temp;
 640
 641         LIMIT(t, 0, term.row-1);
 642         LIMIT(b, 0, term.row-1);
 643         if(t > b) {
 644                 temp = t;
 645                 t = b;
 646                 b = temp;
 647         }
 648         term.top = t;
 649         term.bot = b;
 650 }
 651
 652 void
 653 csihandle(void) {
 654         switch(escseq.mode) {
 655         default:
 656         unknown:
 657                 printf("erresc: unknown csi ");
 658                 csidump();
 659                 /* die(""); */
 660                 break;
 661         case '@': /* ICH -- Insert <n> blank char */
 662                 DEFAULT(escseq.arg[0], 1);
 663                 tinsertblank(escseq.arg[0]);
 664                 break;
 665         case 'A': /* CUU -- Cursor <n> Up */
 666         case 'e':
 667                 DEFAULT(escseq.arg[0], 1);
 668                 tmoveto(term.c.x, term.c.y-escseq.arg[0]);
 669                 break;
 670         case 'B': /* CUD -- Cursor <n> Down */
 671                 DEFAULT(escseq.arg[0], 1);
 672                 tmoveto(term.c.x, term.c.y+escseq.arg[0]);
 673                 break;
 674         case 'C': /* CUF -- Cursor <n> Forward */
 675         case 'a':
 676                 DEFAULT(escseq.arg[0], 1);
 677                 tmoveto(term.c.x+escseq.arg[0], term.c.y);
 678                 break;
 679         case 'D': /* CUB -- Cursor <n> Backward */
 680                 DEFAULT(escseq.arg[0], 1);
 681                 tmoveto(term.c.x-escseq.arg[0], term.c.y);
 682                 break;
 683         case 'E': /* CNL -- Cursor <n> Down and first col */
 684                 DEFAULT(escseq.arg[0], 1);
 685                 tmoveto(0, term.c.y+escseq.arg[0]);
 686                 break;
 687         case 'F': /* CPL -- Cursor <n> Up and first col */
 688                 DEFAULT(escseq.arg[0], 1);
 689                 tmoveto(0, term.c.y-escseq.arg[0]);
 690                 break;
 691         case 'G': /* CHA -- Move to <col> */
 692         case '`': /* XXX: HPA -- same? */
 693                 DEFAULT(escseq.arg[0], 1);
 694                 tmoveto(escseq.arg[0]-1, term.c.y);
 695                 break;
 696         case 'H': /* CUP -- Move to <row> <col> */
 697         case 'f': /* XXX: HVP -- same? */
 698                 DEFAULT(escseq.arg[0], 1);
 699                 DEFAULT(escseq.arg[1], 1);
 700                 tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
 701                 break;
 702         /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
 703         case 'J': /* ED -- Clear screen */
 704                 switch(escseq.arg[0]) {
 705                 case 0: /* below */
 706                         tclearregion(term.c.x, term.c.y, term.col-1, term.row-1);
 707                         break;
 708                 case 1: /* above */
 709                         tclearregion(0, 0, term.c.x, term.c.y);
 710                         break;
 711                 case 2: /* all */
 712                         tclearregion(0, 0, term.col-1, term.row-1);
 713                         break;
 714                 case 3: /* XXX: erase saved lines (xterm) */
 715                 default:
 716                         goto unknown;
 717                 }
 718                 break;
 719         case 'K': /* EL -- Clear line */
 720                 switch(escseq.arg[0]) {
 721                 case 0: /* right */
 722                         tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
 723                         break;
 724                 case 1: /* left */
 725                         tclearregion(0, term.c.y, term.c.x, term.c.y);
 726                         break;
 727                 case 2: /* all */
 728                         tclearregion(0, term.c.y, term.col-1, term.c.y);
 729                         break;
 730                 }
 731                 break;
 732         case 'S': /* SU -- Scroll <n> line up */
 733                 DEFAULT(escseq.arg[0], 1);
 734                 tscrollup(escseq.arg[0]);
 735                 break;
 736         case 'T': /* SD -- Scroll <n> line down */
 737                 DEFAULT(escseq.arg[0], 1);
 738                 tscrolldown(escseq.arg[0]);
 739                 break;
 740         case 'L': /* IL -- Insert <n> blank lines */
 741                 DEFAULT(escseq.arg[0], 1);
 742                 tinsertblankline(escseq.arg[0]);
 743                 break;
 744         case 'l': /* RM -- Reset Mode */
 745                 if(escseq.priv) {
 746                         switch(escseq.arg[0]) {
 747                         case 1:
 748                                 term.mode &= ~MODE_APPKEYPAD;
 749                                 break;
 750                         case 7:
 751                                 term.mode &= ~MODE_WRAP;
 752                                 break;
 753                         case 12: /* att610 -- Stop blinking cursor (IGNORED) */
 754                                 break;
 755                         case 25:
 756                                 term.hidec = 1;
 757                                 break;
 758                         case 1048: /* XXX: no alt. screen to erase/save */
 759                         case 1049:
 760                                 tcursor(CURSOR_LOAD);
 761                                 tclearregion(0, 0, term.col-1, term.row-1);
 762                                 break;
 763                         default:
 764                                 goto unknown;
 765                         }
 766                 } else {
 767                         switch(escseq.arg[0]) {
 768                         case 4:
 769                                 term.mode &= ~MODE_INSERT;
 770                                 break;
 771                         default:
 772                                 goto unknown;
 773                         }
 774                 }
 775                 break;
 776         case 'M': /* DL -- Delete <n> lines */
 777                 DEFAULT(escseq.arg[0], 1);
 778                 tdeleteline(escseq.arg[0]);
 779                 break;
 780         case 'X': /* ECH -- Erase <n> char */
 781                 DEFAULT(escseq.arg[0], 1);
 782                 tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
 783                 break;
 784         case 'P': /* DCH -- Delete <n> char */
 785                 DEFAULT(escseq.arg[0], 1);
 786                 tdeletechar(escseq.arg[0]);
 787                 break;
 788         /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
 789         case 'd': /* VPA -- Move to <row> */
 790                 DEFAULT(escseq.arg[0], 1);
 791                 tmoveto(term.c.x, escseq.arg[0]-1);
 792                 break;
 793         case 'h': /* SM -- Set terminal mode */
 794                 if(escseq.priv) {
 795                         switch(escseq.arg[0]) {
 796                         case 1:
 797                                 term.mode |= MODE_APPKEYPAD;
 798                                 break;
 799                         case 7:
 800                                 term.mode |= MODE_WRAP;
 801                                 break;
 802                         case 12: /* att610 -- Start blinking cursor (IGNORED) */
 803                                 break;
 804                         case 25:
 805                                 term.hidec = 0;
 806                                 break;
 807                         case 1048:
 808                         case 1049: /* XXX: no alt. screen to erase/save */
 809                                 tcursor(CURSOR_SAVE);
 810                                 tclearregion(0, 0, term.col-1, term.row-1);
 811                                 break;
 812                         default: goto unknown;
 813                         }
 814                 } else {
 815                         switch(escseq.arg[0]) {
 816                         case 4:
 817                                 term.mode |= MODE_INSERT;
 818                                 break;
 819                         default: goto unknown;
 820                         }
 821                 };
 822                 break;
 823         case 'm': /* SGR -- Terminal attribute (color) */
 824                 tsetattr(escseq.arg, escseq.narg);
 825                 break;
 826         case 'r': /* DECSTBM -- Set Scrolling Region */
 827                 if(escseq.priv)
 828                         goto unknown;
 829                 else {
 830                         DEFAULT(escseq.arg[0], 1);
 831                         DEFAULT(escseq.arg[1], term.row);
 832                         tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
 833                 }
 834                 break;
 835         case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
 836                 tcursor(CURSOR_SAVE);
 837                 break;
 838         case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
 839                 tcursor(CURSOR_LOAD);
 840                 break;
 841         }
 842 }
 843
 844 void
 845 csidump(void) {
 846         int i;
 847         printf("ESC [ %s", escseq.priv ? "? " : "");
 848         if(escseq.narg)
 849                 for(i = 0; i < escseq.narg; i++)
 850                         printf("%d ", escseq.arg[i]);
 851         if(escseq.mode)
 852                 putchar(escseq.mode);
 853         putchar('\n');
 854 }
 855
 856 void
 857 csireset(void) {
 858         memset(&escseq, 0, sizeof(escseq));
 859 }
 860
 861 void
 862 tputtab(void) {
 863         int space = TAB - term.c.x % TAB;
 864         tmoveto(term.c.x + space, term.c.y);
 865 }
 866
 867 void
 868 tputc(char c) {
 869         if(term.esc & ESC_START) {
 870                 if(term.esc & ESC_CSI) {
 871                         escseq.buf[escseq.len++] = c;
 872                         if(BETWEEN(c, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
 873                                 term.esc = 0;
 874                                 csiparse(), csihandle();
 875                         }
 876                 } else if(term.esc & ESC_OSC) {
 877                         if(c == ';') {
 878                                 term.titlelen = 0;
 879                                 term.esc = ESC_START | ESC_TITLE;
 880                         }
 881                 } else if(term.esc & ESC_TITLE) {
 882                         if(c == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
 883                                 term.esc = 0;
 884                                 term.title[term.titlelen] = '\0';
 885                                 XStoreName(xw.dis, xw.win, term.title);
 886                         } else {
 887                                 term.title[term.titlelen++] = c;
 888                         }
 889                 } else if(term.esc & ESC_ALTCHARSET) {
 890                         switch(c) {
 891                         case '0': /* Line drawing crap */
 892                                 term.c.attr.mode |= ATTR_GFX;
 893                                 break;
 894                         case 'B': /* Back to regular text */
 895                                 term.c.attr.mode &= ~ATTR_GFX;
 896                                 break;
 897                         default:
 898                                 printf("esc unhandled charset: ESC ( %c\n", c);
 899                         }
 900                         term.esc = 0;
 901                 } else {
 902                         switch(c) {
 903                         case '[':
 904                                 term.esc |= ESC_CSI;
 905                                 break;
 906                         case ']':
 907                                 term.esc |= ESC_OSC;
 908                                 break;
 909                         case '(':
 910                                 term.esc |= ESC_ALTCHARSET;
 911                                 break;
 912                         case 'A':
 913                                 tmoveto(term.c.x, term.c.y-1);
 914                                 term.esc = 0;
 915                                 break;
 916                         case 'B':
 917                                 tmoveto(term.c.x, term.c.y+1);
 918                                 term.esc = 0;
 919                                 break;
 920                         case 'C':
 921                                 tmoveto(term.c.x+1, term.c.y);
 922                                 term.esc = 0;
 923                                 break;
 924                         case 'D': /* XXX: CUP (VT100) or IND (VT52) ... */
 925                                 tmoveto(term.c.x-1, term.c.y);
 926                                 term.esc = 0;
 927                                 break;
 928                         case 'E': /* NEL -- Next line */
 929                                 tnewline();
 930                                 term.esc = 0;
 931                                 break;
 932                         case 'M': /* RI -- Reverse index */
 933                                 if(term.c.y == term.top)
 934                                         tscrolldown(1);
 935                                 else
 936                                         tmoveto(term.c.x, term.c.y-1);
 937                                 term.esc = 0;
 938                                 break;
 939                         case 'c': /* RIS -- Reset to inital state */
 940                                 treset();
 941                                 term.esc = 0;
 942                                 break;
 943                         case '=': /* DECPAM */
 944                                 term.mode |= MODE_APPKEYPAD;
 945                                 term.esc = 0;
 946                                 break;
 947                         case '>': /* DECPNM */
 948                                 term.mode &= ~MODE_APPKEYPAD;
 949                                 term.esc = 0;
 950                                 break;
 951                         case '7':
 952                                 tcursor(CURSOR_SAVE);
 953                                 term.esc = 0;
 954                                 break;
 955                         case '8':
 956                                 tcursor(CURSOR_LOAD);
 957                                 term.esc = 0;
 958                                 break;
 959                         default:
 960                                 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n", c, isprint(c)?c:'.');
 961                                 term.esc = 0;
 962                         }
 963                 }
 964         } else {
 965                 switch(c) {
 966                 case '\t':
 967                         tputtab();
 968                         break;
 969                 case '\b':
 970                         tmovecursor(CURSOR_LEFT);
 971                         break;
 972                 case '\r':
 973                         tmoveto(0, term.c.y);
 974                         break;
 975                 case '\n':
 976                         tnewline();
 977                         break;
 978                 case '\a':
 979                         xbell();
 980                         break;
 981                 case '\033':
 982                         csireset();
 983                         term.esc = ESC_START;
 984                         break;
 985                 default:
 986                         tsetchar(c);
 987                         tmovecursor(CURSOR_RIGHT);
 988                         break;
 989                 }
 990         }
 991 }
 992
 993 void
 994 tputs(char *s, int len) {
 995         for(; len > 0; len--)
 996                 tputc(*s++);
 997 }
 998
 999 void
1000 tresize(int col, int row) {
1001         int i;
1002         Line *line;
1003         int minrow = MIN(row, term.row);
1004         int mincol = MIN(col, term.col);
1005
1006         if(col < 1 || row < 1)
1007                 return;
1008         /* alloc */
1009         line = calloc(row, sizeof(Line));
1010         for(i = 0 ; i < row; i++)
1011                 line[i] = calloc(col, sizeof(Glyph));
1012         /* copy */
1013         for(i = 0 ; i < minrow; i++)
1014                 memcpy(line[i], term.line[i], mincol * sizeof(Glyph));
1015         /* free */
1016         for(i = 0; i < term.row; i++)
1017                 free(term.line[i]);
1018         free(term.line);
1019
1020         LIMIT(term.c.x, 0, col-1);
1021         LIMIT(term.c.y, 0, row-1);
1022         LIMIT(term.top, 0, row-1);
1023         LIMIT(term.bot, 0, row-1);
1024
1025         term.bot = row-1;
1026         term.line = line;
1027         term.col = col, term.row = row;
1028 }
1029
1030 void
1031 xloadcols(void) {
1032         int i, r, g, b;
1033         XColor color;
1034         Colormap cmap = DefaultColormap(xw.dis, xw.scr);
1035         unsigned long white = WhitePixel(xw.dis, xw.scr);
1036
1037         for(i = 0; i < 16; i++) {
1038                 if (!XAllocNamedColor(xw.dis, cmap, colorname[i], &color, &color)) {
1039                         dc.col[i] = white;
1040                         fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1041                 } else
1042                         dc.col[i] = color.pixel;
1043         }
1044
1045         /* same colors as xterm */
1046         for(r = 0; r < 6; r++)
1047                 for(g = 0; g < 6; g++)
1048                         for(b = 0; b < 6; b++) {
1049                                 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1050                                 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1051                                 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1052                                 if (!XAllocColor(xw.dis, cmap, &color)) {
1053                                         dc.col[i] = white;
1054                                         fprintf(stderr, "Could not allocate color %d\n", i);
1055                                 } else
1056                                         dc.col[i] = color.pixel;
1057                                 i++;
1058                         }
1059
1060         for(r = 0; r < 24; r++, i++) {
1061                 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1062                 if (!XAllocColor(xw.dis, cmap, &color)) {
1063                         dc.col[i] = white;
1064                         fprintf(stderr, "Could not allocate color %d\n", i);
1065                 } else
1066                         dc.col[i] = color.pixel;
1067         }
1068 }
1069
1070 void
1071 xclear(int x1, int y1, int x2, int y2) {
1072         XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1073         XFillRectangle(xw.dis, xw.buf, dc.gc,
1074                        x1 * xw.cw, y1 * xw.ch,
1075                        (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1076 }
1077
1078 void
1079 xhints(void)
1080 {
1081         XClassHint class = {TNAME, TNAME};
1082         XWMHints wm = {.flags = InputHint, .input = 1};
1083         XSizeHints size = {
1084                 .flags = PSize | PResizeInc | PBaseSize,
1085                 .height = xw.h,
1086                 .width = xw.w,
1087                 .height_inc = xw.ch,
1088                 .width_inc = xw.cw,
1089                 .base_height = 2*BORDER,
1090                 .base_width = 2*BORDER,
1091         };
1092         XSetWMProperties(xw.dis, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1093 }
1094
1095 void
1096 xinit(void) {
1097         xw.dis = XOpenDisplay(NULL);
1098         xw.scr = XDefaultScreen(xw.dis);
1099         if(!xw.dis)
1100                 die("Can't open display\n");
1101
1102         /* font */
1103         if(!(dc.font = XLoadQueryFont(xw.dis, FONT)) || !(dc.bfont = XLoadQueryFont(xw.dis, BOLDFONT)))
1104                 die("Can't load font %s\n", dc.font ? BOLDFONT : FONT);
1105
1106         /* XXX: Assuming same size for bold font */
1107         xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing;
1108         xw.ch = dc.font->ascent + dc.font->descent;
1109
1110         /* colors */
1111         xloadcols();
1112
1113         term.c.attr.fg = DefaultFG;
1114         term.c.attr.bg = DefaultBG;
1115         term.c.attr.mode = ATTR_NULL;
1116         /* windows */
1117         xw.h = term.row * xw.ch + 2*BORDER;
1118         xw.w = term.col * xw.cw + 2*BORDER;
1119         xw.win = XCreateSimpleWindow(xw.dis, XRootWindow(xw.dis, xw.scr), 0, 0,
1120                         xw.w, xw.h, 0,
1121                         dc.col[DefaultBG],
1122                         dc.col[DefaultBG]);
1123         xw.bufw = xw.w - 2*BORDER;
1124         xw.bufh = xw.h - 2*BORDER;
1125         xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1126         /* gc */
1127         dc.gc = XCreateGC(xw.dis, xw.win, 0, NULL);
1128         XMapWindow(xw.dis, xw.win);
1129         xhints();
1130         XStoreName(xw.dis, xw.win, "st");
1131         XSync(xw.dis, 0);
1132 }
1133
1134 void
1135 xdraws(char *s, Glyph base, int x, int y, int len) {
1136         unsigned long xfg, xbg;
1137         int winx = x*xw.cw, winy = y*xw.ch + dc.font->ascent, width = len*xw.cw;
1138         int i;
1139
1140         if(base.mode & ATTR_REVERSE)
1141                 xfg = dc.col[base.bg], xbg = dc.col[base.fg];
1142         else
1143                 xfg = dc.col[base.fg], xbg = dc.col[base.bg];
1144
1145         XSetBackground(xw.dis, dc.gc, xbg);
1146         XSetForeground(xw.dis, dc.gc, xfg);
1147
1148         if(base.mode & ATTR_GFX)
1149                 for(i = 0; i < len; i++)
1150                         s[i] = gfx[(int)s[i]];
1151
1152         XSetFont(xw.dis, dc.gc, base.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1153         XDrawImageString(xw.dis, xw.buf, dc.gc, winx, winy, s, len);
1154
1155         if(base.mode & ATTR_UNDERLINE)
1156                 XDrawLine(xw.dis, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1157 }
1158
1159 void
1160 xcursor(int mode) {
1161         static int oldx = 0;
1162         static int oldy = 0;
1163         Glyph g = {' ', ATTR_NULL, DefaultBG, DefaultCS, 0};
1164
1165         LIMIT(oldx, 0, term.col-1);
1166         LIMIT(oldy, 0, term.row-1);
1167
1168         if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
1169                 g.c = term.line[term.c.y][term.c.x].c;
1170
1171         /* remove the old cursor */
1172         if(term.line[oldy][oldx].state & GLYPH_SET)
1173                 xdraws(&term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1);
1174         else
1175                 xclear(oldx, oldy, oldx, oldy);
1176
1177         /* draw the new one */
1178         if(mode == CURSOR_DRAW) {
1179                 xdraws(&g.c, g, term.c.x, term.c.y, 1);
1180                 oldx = term.c.x, oldy = term.c.y;
1181         }
1182 }
1183
1184 #ifdef DEBUG
1185 /* basic drawing routines */
1186 void
1187 xdrawc(int x, int y, Glyph g) {
1188         XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
1189         XSetBackground(xw.dis, dc.gc, dc.col[g.bg]);
1190         XSetForeground(xw.dis, dc.gc, dc.col[g.fg]);
1191         XSetFont(xw.dis, dc.gc, g.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1192         XDrawImageString(xw.dis, xw.buf, dc.gc, r.x, r.y+dc.font->ascent, &g.c, 1);
1193 }
1194
1195 void
1196 draw(int dummy) {
1197         int x, y;
1198
1199         xclear(0, 0, term.col-1, term.row-1);
1200         for(y = 0; y < term.row; y++)
1201                 for(x = 0; x < term.col; x++)
1202                         if(term.line[y][x].state & GLYPH_SET)
1203                                 xdrawc(x, y, term.line[y][x]);
1204
1205         if(!term.hidec)
1206                 xcursor(CURSOR_DRAW);
1207         XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1208         XFlush(xw.dis);
1209 }
1210
1211 #else
1212 /* optimized drawing routine */
1213 void
1214 draw(int redraw_all) {
1215         int i, x, y, ox;
1216         Glyph base, new;
1217         char buf[DRAW_BUF_SIZ];
1218
1219         XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1220         XFillRectangle(xw.dis, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
1221         for(y = 0; y < term.row; y++) {
1222                 base = term.line[y][0];
1223                 i = ox = 0;
1224                 for(x = 0; x < term.col; x++) {
1225                         new = term.line[y][x];
1226                         if(!ATTRCMP(base, new) && i < DRAW_BUF_SIZ)
1227                                 buf[i++] = new.c;
1228                         else {
1229                                 xdraws(buf, base, ox, y, i);
1230                                 buf[0] = new.c;
1231                                 i = 1;
1232                                 ox = x;
1233                                 base = new;
1234                         }
1235                 }
1236                 xdraws(buf, base, ox, y, i);
1237         }
1238         xcursor(term.hidec ? CURSOR_HIDE : CURSOR_DRAW);
1239         XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1240         XFlush(xw.dis);
1241 }
1242
1243 #endif
1244
1245 void
1246 expose(XEvent *ev) {
1247         draw(SCREEN_REDRAW);
1248 }
1249
1250 char*
1251 kmap(KeySym k) {
1252         int i;
1253         for(i = 0; i < LEN(key); i++)
1254                 if(key[i].k == k)
1255                         return (char*)key[i].s;
1256         return NULL;
1257 }
1258
1259 void
1260 kpress(XEvent *ev) {
1261         XKeyEvent *e = &ev->xkey;
1262         KeySym ksym;
1263         char buf[32];
1264         char *customkey;
1265         int len;
1266         int meta;
1267         int shift;
1268
1269         meta = e->state & Mod1Mask;
1270         shift = e->state & ShiftMask;
1271         len = XLookupString(e, buf, sizeof(buf), &ksym, NULL);
1272
1273         if((customkey = kmap(ksym)))
1274                 ttywrite(customkey, strlen(customkey));
1275         else if(len > 0) {
1276                 buf[sizeof(buf)-1] = '\0';
1277                 if(meta && len == 1)
1278                         ttywrite("\033", 1);
1279                 ttywrite(buf, len);
1280         } else
1281                 switch(ksym) {
1282                 case XK_Up:
1283                 case XK_Down:
1284                 case XK_Left:
1285                 case XK_Right:
1286                         sprintf(buf, "\033%c%c", term.mode & MODE_APPKEYPAD ? 'O' : '[', "DACB"[ksym - XK_Left]);
1287                         ttywrite(buf, 3);
1288                         break;
1289                 case XK_Insert:
1290                         if(shift)
1291                                 draw(1), puts("draw!")/* XXX: paste X clipboard */;
1292                         break;
1293                 default:
1294                         fprintf(stderr, "errkey: %d\n", (int)ksym);
1295                         break;
1296                 }
1297 }
1298
1299 void
1300 resize(XEvent *e) {
1301         int col, row;
1302
1303         if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
1304                 return;
1305
1306         xw.w = e->xconfigure.width;
1307         xw.h = e->xconfigure.height;
1308         xw.bufw = xw.w - 2*BORDER;
1309         xw.bufh = xw.h - 2*BORDER;
1310         col = xw.bufw / xw.cw;
1311         row = xw.bufh / xw.ch;
1312         tresize(col, row);
1313         ttyresize(col, row);
1314         XFreePixmap(xw.dis, xw.buf);
1315         xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1316         draw(SCREEN_REDRAW);
1317 }
1318
1319 void
1320 run(void) {
1321         XEvent ev;
1322         fd_set rfd;
1323         int xfd = XConnectionNumber(xw.dis);
1324
1325         running = 1;
1326         XSelectInput(xw.dis, xw.win, ExposureMask | KeyPressMask | StructureNotifyMask);
1327         XResizeWindow(xw.dis, xw.win, xw.w, xw.h); /* XXX: fix resize bug in wmii (?) */
1328
1329         while(running) {
1330                 FD_ZERO(&rfd);
1331                 FD_SET(cmdfd, &rfd);
1332                 FD_SET(xfd, &rfd);
1333                 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) == -1) {
1334                         if(errno == EINTR)
1335                                 continue;
1336                         die("select failed: %s\n", SERRNO);
1337                 }
1338                 if(FD_ISSET(cmdfd, &rfd)) {
1339                         ttyread();
1340                         draw(SCREEN_UPDATE);
1341                 }
1342                 while(XPending(xw.dis)) {
1343                         XNextEvent(xw.dis, &ev);
1344                         if(handler[ev.type])
1345                                 (handler[ev.type])(&ev);
1346                 }
1347         }
1348 }
1349
1350 int
1351 main(int argc, char *argv[]) {
1352         if(argc == 2 && !strncmp("-v", argv[1], 3))
1353                 die("st-" VERSION ", © 2009 st engineers\n");
1354         else if(argc != 1)
1355                 die("usage: st [-v]\n");
1356         setlocale(LC_CTYPE, "");
1357         tnew(80, 24);
1358         ttynew();
1359         xinit();
1360         run();
1361         return 0;
1362 }