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 tputc(char);
 140 static void tputs(char*, int);
 141 static void treset(void);
 142 static void tresize(int, int);
 143 static void tscroll(void);
 144 static void tscrollup(int);
 145 static void tscrolldown(int);
 146 static void tsetattr(int*, int);
 147 static void tsetchar(char);
 148 static void tsetscroll(int, int);
 149
 150 static void ttynew(void);
 151 static void ttyread(void);
 152 static void ttyresize(int, int);
 153 static void ttywrite(const char *, size_t);
 154
 155 static void xclear(int, int, int, int);
 156 static void xcursor(int);
 157 static void xinit(void);
 158 static void xloadcols(void);
 159
 160 static void expose(XEvent *);
 161 static char* kmap(KeySym);
 162 static void kpress(XEvent *);
 163 static void resize(XEvent *);
 164
 165 static void (*handler[LASTEvent])(XEvent *) = {
 166         [KeyPress] = kpress,
 167         [Expose] = expose,
 168         [ConfigureNotify] = resize
 169 };
 170
 171 /* Globals */
 172 static DC dc;
 173 static XWindow xw;
 174 static Term term;
 175 static CSIEscape escseq;
 176 static int cmdfd;
 177 static pid_t pid;
 178 static int running;
 179
 180 #ifdef DEBUG
 181 void
 182 tdump(void) {
 183         int row, col;
 184         Glyph c;
 185
 186         for(row = 0; row < term.row; row++) {
 187                 for(col = 0; col < term.col; col++) {
 188                         if(col == term.c.x && row == term.c.y)
 189                                 putchar('#');
 190                         else {
 191                                 c = term.line[row][col];
 192                                 putchar(c.state & GLYPH_SET ? c.c : '.');
 193                         }
 194                 }
 195                 putchar('\n');
 196         }
 197 }
 198 #endif
 199
 200 void
 201 die(const char *errstr, ...) {
 202         va_list ap;
 203
 204         va_start(ap, errstr);
 205         vfprintf(stderr, errstr, ap);
 206         va_end(ap);
 207         exit(EXIT_FAILURE);
 208 }
 209
 210 void
 211 execsh(void) {
 212         char *args[3] = {getenv("SHELL"), "-i", NULL};
 213         DEFAULT(args[0], "/bin/sh"); /* default shell if getenv() failed */
 214         putenv("TERM=" TNAME);
 215         execvp(args[0], args);
 216 }
 217
 218 void
 219 xbell(void) { /* visual bell */
 220         XRectangle r = { BORDER, BORDER, xw.bufw, xw.bufh };
 221         XSetForeground(xw.dis, dc.gc, dc.col[BellCol]);
 222         XFillRectangles(xw.dis, xw.win, dc.gc, &r, 1);
 223         /* usleep(30000); */
 224         draw(SCREEN_REDRAW);
 225 }
 226
 227 void
 228 sigchld(int a) {
 229         int stat = 0;
 230         if(waitpid(pid, &stat, 0) < 0)
 231                 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
 232         if(WIFEXITED(stat))
 233                 exit(WEXITSTATUS(stat));
 234         else
 235                 exit(EXIT_FAILURE);
 236 }
 237
 238 void
 239 ttynew(void) {
 240         int m, s;
 241         char *pts;
 242
 243         if((m = posix_openpt(O_RDWR | O_NOCTTY)) < 0)
 244                 die("openpt failed: %s\n", SERRNO);
 245         if(grantpt(m) < 0)
 246                 die("grandpt failed: %s\n", SERRNO);
 247         if(unlockpt(m) < 0)
 248                 die("unlockpt failed: %s\n", SERRNO);
 249         if(!(pts = ptsname(m)))
 250                 die("ptsname failed: %s\n", SERRNO);
 251         if((s = open(pts, O_RDWR | O_NOCTTY)) < 0)
 252                 die("Couldn't open slave: %s\n", SERRNO);
 253         fcntl(s, F_SETFL, O_NDELAY);
 254         switch(pid = fork()) {
 255         case -1:
 256                 die("fork failed\n");
 257                 break;
 258         case 0:
 259                 setsid(); /* create a new process group */
 260                 dup2(s, STDIN_FILENO);
 261                 dup2(s, STDOUT_FILENO);
 262                 dup2(s, STDERR_FILENO);
 263                 if(ioctl(s, TIOCSCTTY, NULL) < 0)
 264                         die("ioctl TTIOCSTTY failed: %s\n", SERRNO);
 265                 execsh();
 266                 break;
 267         default:
 268                 close(s);
 269                 cmdfd = m;
 270                 signal(SIGCHLD, sigchld);
 271         }
 272 }
 273
 274 void
 275 dump(char c) {
 276         static int col;
 277         fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
 278         if(++col % 10 == 0)
 279                 fprintf(stderr, "\n");
 280 }
 281
 282 void
 283 ttyread(void) {
 284         char buf[BUFSIZ] = {0};
 285         int ret;
 286
 287         if((ret = read(cmdfd, buf, BUFSIZ)) < 0)
 288                 die("Couldn't read from shell: %s\n", SERRNO);
 289         else
 290                 tputs(buf, ret);
 291 }
 292
 293 void
 294 ttywrite(const char *s, size_t n) {
 295         if(write(cmdfd, s, n) == -1)
 296                 die("write error on tty: %s\n", SERRNO);
 297 }
 298
 299 void
 300 ttyresize(int x, int y) {
 301         struct winsize w;
 302
 303         w.ws_row = term.row;
 304         w.ws_col = term.col;
 305         w.ws_xpixel = w.ws_ypixel = 0;
 306         if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
 307                 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
 308 }
 309
 310 void
 311 tcursor(int mode) {
 312         static TCursor c;
 313
 314         if(mode == CURSOR_SAVE)
 315                 c = term.c;
 316         else if(mode == CURSOR_LOAD)
 317                 term.c = c, tmoveto(c.x, c.y);
 318 }
 319
 320 void
 321 treset(void) {
 322         term.c.attr.mode = ATTR_NULL;
 323         term.c.attr.fg = DefaultFG;
 324         term.c.attr.bg = DefaultBG;
 325         term.c.x = term.c.y = 0;
 326         term.hidec = 0;
 327         term.top = 0, term.bot = term.row - 1;
 328         term.mode = MODE_WRAP;
 329         tclearregion(0, 0, term.col-1, term.row-1);
 330 }
 331
 332 void
 333 tnew(int col, int row) {   /* screen size */
 334         term.row = row, term.col = col;
 335         term.top = 0, term.bot = term.row - 1;
 336         /* mode */
 337         term.mode = MODE_WRAP;
 338         /* cursor */
 339         term.c.attr.mode = ATTR_NULL;
 340         term.c.attr.fg = DefaultFG;
 341         term.c.attr.bg = DefaultBG;
 342         term.c.x = term.c.y = 0;
 343         term.hidec = 0;
 344         /* allocate screen */
 345         term.line = calloc(term.row, sizeof(Line));
 346         for(row = 0 ; row < term.row; row++)
 347                 term.line[row] = calloc(term.col, sizeof(Glyph));
 348 }
 349
 350 /* TODO: Replace with scrollup/scolldown */
 351 void
 352 tscroll(void) {
 353         Line temp = term.line[term.top];
 354         int i;
 355
 356         for(i = term.top; i < term.bot; i++)
 357                 term.line[i] = term.line[i+1];
 358         memset(temp, 0, sizeof(Glyph) * term.col);
 359         term.line[term.bot] = temp;
 360 }
 361
 362 void
 363 tscrolldown (int n) {
 364         int i;
 365         Line temp;
 366
 367         LIMIT(n, 0, term.bot-term.top+1);
 368
 369         for(i = 0; i < n; i++)
 370                 memset(term.line[term.bot-i], 0, term.col*sizeof(Glyph));
 371
 372         for(i = term.bot; i >= term.top+n; i--) {
 373                 temp = term.line[i];
 374                 term.line[i] = term.line[i-n];
 375                 term.line[i-n] = temp;
 376         }
 377 }
 378
 379 void
 380 tscrollup (int n) {
 381         int i;
 382         Line temp;
 383         LIMIT(n, 0, term.bot-term.top+1);
 384
 385         for(i = 0; i < n; i++)
 386                 memset(term.line[term.top+i], 0, term.col*sizeof(Glyph));
 387
 388          for(i = term.top; i <= term.bot-n; i++) {
 389                  temp = term.line[i];
 390                  term.line[i] = term.line[i+n];
 391                  term.line[i+n] = temp;
 392          }
 393 }
 394
 395 void
 396 tnewline(void) {
 397         int y = term.c.y + 1;
 398         if(y > term.bot)
 399                 tscroll(), y = term.bot;
 400         tmoveto(0, y);
 401 }
 402
 403 void
 404 csiparse(void) {
 405         /* int noarg = 1; */
 406         char *p = escseq.buf;
 407
 408         escseq.narg = 0;
 409         if(*p == '?')
 410                 escseq.priv = 1, p++;
 411
 412         while(p < escseq.buf+escseq.len) {
 413                 while(isdigit(*p)) {
 414                         escseq.arg[escseq.narg] *= 10;
 415                         escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
 416                 }
 417                 if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
 418                         escseq.narg++, p++;
 419                 else {
 420                         escseq.mode = *p;
 421                         escseq.narg++;
 422                         return;
 423                 }
 424         }
 425 }
 426
 427 void
 428 tmoveto(int x, int y) {
 429         term.c.x = x < 0 ? 0 : x >= term.col ? term.col-1 : x;
 430         term.c.y = y < 0 ? 0 : y >= term.row ? term.row-1 : y;
 431 }
 432
 433 void
 434 tmovecursor(int dir) {
 435         int xf = term.c.x, yf = term.c.y;
 436
 437         switch(dir) {
 438         case CURSOR_UP:
 439                 yf--;
 440                 break;
 441         case CURSOR_DOWN:
 442                 yf++;
 443                 break;
 444         case CURSOR_LEFT:
 445                 xf--;
 446                 if(term.mode & MODE_WRAP && xf < 0) {
 447                         xf = term.col-1, yf--;
 448                         if(yf < term.top)
 449                                 yf = term.top, xf = 0;
 450                 }
 451                 break;
 452         case CURSOR_RIGHT:
 453                 xf++;
 454                 if(term.mode & MODE_WRAP && xf >= term.col) {
 455                         xf = 0, yf++;
 456                         if(yf > term.bot)
 457                                 yf = term.bot, tscroll();
 458                 }
 459                 break;
 460         }
 461         tmoveto(xf, yf);
 462 }
 463
 464 void
 465 tsetchar(char c) {
 466         term.line[term.c.y][term.c.x] = term.c.attr;
 467         term.line[term.c.y][term.c.x].c = c;
 468         term.line[term.c.y][term.c.x].state |= GLYPH_SET;
 469 }
 470
 471 void
 472 tclearregion(int x1, int y1, int x2, int y2) {
 473         int y, temp;
 474
 475         if(x1 > x2)
 476                 temp = x1, x1 = x2, x2 = temp;
 477         if(y1 > y2)
 478                 temp = y1, y1 = y2, y2 = temp;
 479
 480         LIMIT(x1, 0, term.col-1);
 481         LIMIT(x2, 0, term.col-1);
 482         LIMIT(y1, 0, term.row-1);
 483         LIMIT(y2, 0, term.row-1);
 484
 485         for(y = y1; y <= y2; y++)
 486                 memset(&term.line[y][x1], 0, sizeof(Glyph)*(x2-x1+1));
 487 }
 488
 489 void
 490 tdeletechar(int n) {
 491         int src = term.c.x + n;
 492         int dst = term.c.x;
 493         int size = term.col - src;
 494
 495         if(src >= term.col) {
 496                 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
 497                 return;
 498         }
 499         memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
 500         tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
 501 }
 502
 503 void
 504 tinsertblank(int n) {
 505         int src = term.c.x;
 506         int dst = src + n;
 507         int size = term.col - dst;
 508
 509         if(dst >= term.col) {
 510                 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
 511                 return;
 512         }
 513         memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
 514         tclearregion(src, term.c.y, dst - 1, term.c.y);
 515 }
 516
 517 void
 518 tinsertblankline(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 = bot; i >= term.c.y+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 tdeleteline(int n) {
 543         int i;
 544         Line blank;
 545         int bot = term.bot;
 546
 547         if(term.c.y > term.bot)
 548                 bot = term.row - 1;
 549         else if(term.c.y < term.top)
 550                 bot = term.top - 1;
 551         if(term.c.y + n >= bot) {
 552                 tclearregion(0, term.c.y, term.col-1, bot);
 553                 return;
 554         }
 555         for(i = term.c.y; i <= bot-n; i++) {
 556                 /* swap deleted line <-> blanked line */
 557                 blank = term.line[i];
 558                 term.line[i] = term.line[i+n];
 559                 term.line[i+n] = blank;
 560                 /* blank it */
 561                 memset(blank, 0, term.col * sizeof(Glyph));
 562         }
 563 }
 564
 565 void
 566 tsetattr(int *attr, int l) {
 567         int i;
 568
 569         for(i = 0; i < l; i++) {
 570                 switch(attr[i]) {
 571                 case 0:
 572                         term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
 573                         term.c.attr.fg = DefaultFG;
 574                         term.c.attr.bg = DefaultBG;
 575                         break;
 576                 case 1:
 577                         term.c.attr.mode |= ATTR_BOLD;
 578                         break;
 579                 case 4:
 580                         term.c.attr.mode |= ATTR_UNDERLINE;
 581                         break;
 582                 case 7:
 583                         term.c.attr.mode |= ATTR_REVERSE;
 584                         break;
 585                 case 22:
 586                         term.c.attr.mode &= ~ATTR_BOLD;
 587                         break;
 588                 case 24:
 589                         term.c.attr.mode &= ~ATTR_UNDERLINE;
 590                         break;
 591                 case 27:
 592                         term.c.attr.mode &= ~ATTR_REVERSE;
 593                         break;
 594                 case 38:
 595                         if (i + 2 < l && attr[i + 1] == 5) {
 596                                 i += 2;
 597                                 if (BETWEEN(attr[i], 0, 255))
 598                                         term.c.attr.fg = attr[i];
 599                                 else
 600                                         fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
 601                         }
 602                         else
 603                                 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
 604                         break;
 605                 case 39:
 606                         term.c.attr.fg = DefaultFG;
 607                         break;
 608                 case 48:
 609                         if (i + 2 < l && attr[i + 1] == 5) {
 610                                 i += 2;
 611                                 if (BETWEEN(attr[i], 0, 255))
 612                                         term.c.attr.bg = attr[i];
 613                                 else
 614                                         fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
 615                         }
 616                         else
 617                                 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
 618                         break;
 619                 case 49:
 620                         term.c.attr.bg = DefaultBG;
 621                         break;
 622                 default:
 623                         if(BETWEEN(attr[i], 30, 37))
 624                                 term.c.attr.fg = attr[i] - 30;
 625                         else if(BETWEEN(attr[i], 40, 47))
 626                                 term.c.attr.bg = attr[i] - 40;
 627                         else if(BETWEEN(attr[i], 90, 97))
 628                                 term.c.attr.fg = attr[i] - 90 + 8;
 629                         else if(BETWEEN(attr[i], 100, 107))
 630                                 term.c.attr.fg = attr[i] - 100 + 8;
 631                         else
 632                                 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
 633                         break;
 634                 }
 635         }
 636 }
 637
 638 void
 639 tsetscroll(int t, int b) {
 640         int temp;
 641
 642         LIMIT(t, 0, term.row-1);
 643         LIMIT(b, 0, term.row-1);
 644         if(t > b) {
 645                 temp = t;
 646                 t = b;
 647                 b = temp;
 648         }
 649         term.top = t;
 650         term.bot = b;
 651 }
 652
 653 void
 654 csihandle(void) {
 655         switch(escseq.mode) {
 656         default:
 657         unknown:
 658                 printf("erresc: unknown csi ");
 659                 csidump();
 660                 /* die(""); */
 661                 break;
 662         case '@': /* ICH -- Insert <n> blank char */
 663                 DEFAULT(escseq.arg[0], 1);
 664                 tinsertblank(escseq.arg[0]);
 665                 break;
 666         case 'A': /* CUU -- Cursor <n> Up */
 667         case 'e':
 668                 DEFAULT(escseq.arg[0], 1);
 669                 tmoveto(term.c.x, term.c.y-escseq.arg[0]);
 670                 break;
 671         case 'B': /* CUD -- Cursor <n> Down */
 672                 DEFAULT(escseq.arg[0], 1);
 673                 tmoveto(term.c.x, term.c.y+escseq.arg[0]);
 674                 break;
 675         case 'C': /* CUF -- Cursor <n> Forward */
 676         case 'a':
 677                 DEFAULT(escseq.arg[0], 1);
 678                 tmoveto(term.c.x+escseq.arg[0], term.c.y);
 679                 break;
 680         case 'D': /* CUB -- Cursor <n> Backward */
 681                 DEFAULT(escseq.arg[0], 1);
 682                 tmoveto(term.c.x-escseq.arg[0], term.c.y);
 683                 break;
 684         case 'E': /* CNL -- Cursor <n> Down and first col */
 685                 DEFAULT(escseq.arg[0], 1);
 686                 tmoveto(0, term.c.y+escseq.arg[0]);
 687                 break;
 688         case 'F': /* CPL -- Cursor <n> Up and first col */
 689                 DEFAULT(escseq.arg[0], 1);
 690                 tmoveto(0, term.c.y-escseq.arg[0]);
 691                 break;
 692         case 'G': /* CHA -- Move to <col> */
 693         case '`': /* XXX: HPA -- same? */
 694                 DEFAULT(escseq.arg[0], 1);
 695                 tmoveto(escseq.arg[0]-1, term.c.y);
 696                 break;
 697         case 'H': /* CUP -- Move to <row> <col> */
 698         case 'f': /* XXX: HVP -- same? */
 699                 DEFAULT(escseq.arg[0], 1);
 700                 DEFAULT(escseq.arg[1], 1);
 701                 tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
 702                 break;
 703         /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
 704         case 'J': /* ED -- Clear screen */
 705                 switch(escseq.arg[0]) {
 706                 case 0: /* below */
 707                         tclearregion(term.c.x, term.c.y, term.col-1, term.row-1);
 708                         break;
 709                 case 1: /* above */
 710                         tclearregion(0, 0, term.c.x, term.c.y);
 711                         break;
 712                 case 2: /* all */
 713                         tclearregion(0, 0, term.col-1, term.row-1);
 714                         break;
 715                 case 3: /* XXX: erase saved lines (xterm) */
 716                 default:
 717                         goto unknown;
 718                 }
 719                 break;
 720         case 'K': /* EL -- Clear line */
 721                 switch(escseq.arg[0]) {
 722                 case 0: /* right */
 723                         tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
 724                         break;
 725                 case 1: /* left */
 726                         tclearregion(0, term.c.y, term.c.x, term.c.y);
 727                         break;
 728                 case 2: /* all */
 729                         tclearregion(0, term.c.y, term.col-1, term.c.y);
 730                         break;
 731                 }
 732                 break;
 733         case 'S': /* SU -- Scroll <n> line up */
 734                 DEFAULT(escseq.arg[0], 1);
 735                 tscrollup(escseq.arg[0]);
 736                 break;
 737         case 'T': /* SD -- Scroll <n> line down */
 738                 DEFAULT(escseq.arg[0], 1);
 739                 tscrolldown(escseq.arg[0]);
 740                 break;
 741         case 'L': /* IL -- Insert <n> blank lines */
 742                 DEFAULT(escseq.arg[0], 1);
 743                 tinsertblankline(escseq.arg[0]);
 744                 break;
 745         case 'l': /* RM -- Reset Mode */
 746                 if(escseq.priv) {
 747                         switch(escseq.arg[0]) {
 748                         case 1:
 749                                 term.mode &= ~MODE_APPKEYPAD;
 750                                 break;
 751                         case 7:
 752                                 term.mode &= ~MODE_WRAP;
 753                                 break;
 754                         case 12: /* att610 -- Stop blinking cursor (IGNORED) */
 755                                 break;
 756                         case 25:
 757                                 term.hidec = 1;
 758                                 break;
 759                         case 1048: /* XXX: no alt. screen to erase/save */
 760                         case 1049:
 761                                 tcursor(CURSOR_LOAD);
 762                                 tclearregion(0, 0, term.col-1, term.row-1);
 763                                 break;
 764                         default:
 765                                 goto unknown;
 766                         }
 767                 } else {
 768                         switch(escseq.arg[0]) {
 769                         case 4:
 770                                 term.mode &= ~MODE_INSERT;
 771                                 break;
 772                         default:
 773                                 goto unknown;
 774                         }
 775                 }
 776                 break;
 777         case 'M': /* DL -- Delete <n> lines */
 778                 DEFAULT(escseq.arg[0], 1);
 779                 tdeleteline(escseq.arg[0]);
 780                 break;
 781         case 'X': /* ECH -- Erase <n> char */
 782                 DEFAULT(escseq.arg[0], 1);
 783                 tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
 784                 break;
 785         case 'P': /* DCH -- Delete <n> char */
 786                 DEFAULT(escseq.arg[0], 1);
 787                 tdeletechar(escseq.arg[0]);
 788                 break;
 789         /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
 790         case 'd': /* VPA -- Move to <row> */
 791                 DEFAULT(escseq.arg[0], 1);
 792                 tmoveto(term.c.x, escseq.arg[0]-1);
 793                 break;
 794         case 'h': /* SM -- Set terminal mode */
 795                 if(escseq.priv) {
 796                         switch(escseq.arg[0]) {
 797                         case 1:
 798                                 term.mode |= MODE_APPKEYPAD;
 799                                 break;
 800                         case 7:
 801                                 term.mode |= MODE_WRAP;
 802                                 break;
 803                         case 12: /* att610 -- Start blinking cursor (IGNORED) */
 804                                 break;
 805                         case 25:
 806                                 term.hidec = 0;
 807                                 break;
 808                         case 1048:
 809                         case 1049: /* XXX: no alt. screen to erase/save */
 810                                 tcursor(CURSOR_SAVE);
 811                                 tclearregion(0, 0, term.col-1, term.row-1);
 812                                 break;
 813                         default: goto unknown;
 814                         }
 815                 } else {
 816                         switch(escseq.arg[0]) {
 817                         case 4:
 818                                 term.mode |= MODE_INSERT;
 819                                 break;
 820                         default: goto unknown;
 821                         }
 822                 };
 823                 break;
 824         case 'm': /* SGR -- Terminal attribute (color) */
 825                 tsetattr(escseq.arg, escseq.narg);
 826                 break;
 827         case 'r': /* DECSTBM -- Set Scrolling Region */
 828                 if(escseq.priv)
 829                         goto unknown;
 830                 else {
 831                         DEFAULT(escseq.arg[0], 1);
 832                         DEFAULT(escseq.arg[1], term.row);
 833                         tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
 834                 }
 835                 break;
 836         case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
 837                 tcursor(CURSOR_SAVE);
 838                 break;
 839         case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
 840                 tcursor(CURSOR_LOAD);
 841                 break;
 842         }
 843 }
 844
 845 void
 846 csidump(void) {
 847         int i;
 848         printf("ESC [ %s", escseq.priv ? "? " : "");
 849         if(escseq.narg)
 850                 for(i = 0; i < escseq.narg; i++)
 851                         printf("%d ", escseq.arg[i]);
 852         if(escseq.mode)
 853                 putchar(escseq.mode);
 854         putchar('\n');
 855 }
 856
 857 void
 858 csireset(void) {
 859         memset(&escseq, 0, sizeof(escseq));
 860 }
 861
 862 void
 863 tputtab(void) {
 864         int space = TAB - term.c.x % TAB;
 865
 866         if(term.c.x + space >= term.col)
 867                 space--;
 868
 869         for(; space > 0; space--)
 870                 tmovecursor(CURSOR_RIGHT);
 871 }
 872
 873 void
 874 tputc(char c) {
 875         if(term.esc & ESC_START) {
 876                 if(term.esc & ESC_CSI) {
 877                         escseq.buf[escseq.len++] = c;
 878                         if(BETWEEN(c, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
 879                                 term.esc = 0;
 880                                 csiparse(), csihandle();
 881                         }
 882                 } else if(term.esc & ESC_OSC) {
 883                         if(c == ';') {
 884                                 term.titlelen = 0;
 885                                 term.esc = ESC_START | ESC_TITLE;
 886                         }
 887                 } else if(term.esc & ESC_TITLE) {
 888                         if(c == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
 889                                 term.esc = 0;
 890                                 term.title[term.titlelen] = '\0';
 891                                 XStoreName(xw.dis, xw.win, term.title);
 892                         } else {
 893                                 term.title[term.titlelen++] = c;
 894                         }
 895                 } else if(term.esc & ESC_ALTCHARSET) {
 896                         switch(c) {
 897                         case '0': /* Line drawing crap */
 898                                 term.c.attr.mode |= ATTR_GFX;
 899                                 break;
 900                         case 'B': /* Back to regular text */
 901                                 term.c.attr.mode &= ~ATTR_GFX;
 902                                 break;
 903                         default:
 904                                 printf("esc unhandled charset: ESC ( %c\n", c);
 905                         }
 906                         term.esc = 0;
 907                 } else {
 908                         switch(c) {
 909                         case '[':
 910                                 term.esc |= ESC_CSI;
 911                                 break;
 912                         case ']':
 913                                 term.esc |= ESC_OSC;
 914                                 break;
 915                         case '(':
 916                                 term.esc |= ESC_ALTCHARSET;
 917                                 break;
 918                         case 'A':
 919                                 tmoveto(term.c.x, term.c.y-1);
 920                                 term.esc = 0;
 921                                 break;
 922                         case 'B':
 923                                 tmoveto(term.c.x, term.c.y+1);
 924                                 term.esc = 0;
 925                                 break;
 926                         case 'C':
 927                                 tmoveto(term.c.x+1, term.c.y);
 928                                 term.esc = 0;
 929                                 break;
 930                         case 'D': /* XXX: CUP (VT100) or IND (VT52) ... */
 931                                 tmoveto(term.c.x-1, term.c.y);
 932                                 term.esc = 0;
 933                                 break;
 934                         case 'E': /* NEL -- Next line */
 935                                 tnewline();
 936                                 term.esc = 0;
 937                                 break;
 938                         case 'M': /* RI -- Reverse index */
 939                                 if(term.c.y == term.top)
 940                                         tscrolldown(1);
 941                                 else
 942                                         tmoveto(term.c.x, term.c.y-1);
 943                                 term.esc = 0;
 944                                 break;
 945                         case 'c': /* RIS -- Reset to inital state */
 946                                 treset();
 947                                 term.esc = 0;
 948                                 break;
 949                         case '=': /* DECPAM */
 950                                 term.mode |= MODE_APPKEYPAD;
 951                                 term.esc = 0;
 952                                 break;
 953                         case '>': /* DECPNM */
 954                                 term.mode &= ~MODE_APPKEYPAD;
 955                                 term.esc = 0;
 956                                 break;
 957                         case '7':
 958                                 tcursor(CURSOR_SAVE);
 959                                 term.esc = 0;
 960                                 break;
 961                         case '8':
 962                                 tcursor(CURSOR_LOAD);
 963                                 term.esc = 0;
 964                                 break;
 965                         default:
 966                                 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n", c, isprint(c)?c:'.');
 967                                 term.esc = 0;
 968                         }
 969                 }
 970         } else {
 971                 switch(c) {
 972                 case '\t':
 973                         tputtab();
 974                         break;
 975                 case '\b':
 976                         tmovecursor(CURSOR_LEFT);
 977                         break;
 978                 case '\r':
 979                         tmoveto(0, term.c.y);
 980                         break;
 981                 case '\n':
 982                         tnewline();
 983                         break;
 984                 case '\a':
 985                         xbell();
 986                         break;
 987                 case '\033':
 988                         csireset();
 989                         term.esc = ESC_START;
 990                         break;
 991                 default:
 992                         tsetchar(c);
 993                         tmovecursor(CURSOR_RIGHT);
 994                         break;
 995                 }
 996         }
 997 }
 998
 999 void
1000 tputs(char *s, int len) {
1001         for(; len > 0; len--)
1002                 tputc(*s++);
1003 }
1004
1005 void
1006 tresize(int col, int row) {
1007         int i;
1008         Line *line;
1009         int minrow = MIN(row, term.row);
1010         int mincol = MIN(col, term.col);
1011
1012         if(col < 1 || row < 1)
1013                 return;
1014         /* alloc */
1015         line = calloc(row, sizeof(Line));
1016         for(i = 0 ; i < row; i++)
1017                 line[i] = calloc(col, sizeof(Glyph));
1018         /* copy */
1019         for(i = 0 ; i < minrow; i++)
1020                 memcpy(line[i], term.line[i], mincol * sizeof(Glyph));
1021         /* free */
1022         for(i = 0; i < term.row; i++)
1023                 free(term.line[i]);
1024         free(term.line);
1025
1026         LIMIT(term.c.x, 0, col-1);
1027         LIMIT(term.c.y, 0, row-1);
1028         LIMIT(term.top, 0, row-1);
1029         LIMIT(term.bot, 0, row-1);
1030
1031         term.bot = row-1;
1032         term.line = line;
1033         term.col = col, term.row = row;
1034 }
1035
1036 void
1037 xloadcols(void) {
1038         int i, r, g, b;
1039         XColor color;
1040         Colormap cmap = DefaultColormap(xw.dis, xw.scr);
1041         unsigned long white = WhitePixel(xw.dis, xw.scr);
1042
1043         for(i = 0; i < 16; i++) {
1044                 if (!XAllocNamedColor(xw.dis, cmap, colorname[i], &color, &color)) {
1045                         dc.col[i] = white;
1046                         fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1047                 } else
1048                         dc.col[i] = color.pixel;
1049         }
1050
1051         /* same colors as xterm */
1052         for(r = 0; r < 6; r++)
1053                 for(g = 0; g < 6; g++)
1054                         for(b = 0; b < 6; b++) {
1055                                 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1056                                 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1057                                 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1058                                 if (!XAllocColor(xw.dis, cmap, &color)) {
1059                                         dc.col[i] = white;
1060                                         fprintf(stderr, "Could not allocate color %d\n", i);
1061                                 } else
1062                                         dc.col[i] = color.pixel;
1063                                 i++;
1064                         }
1065
1066         for(r = 0; r < 24; r++, i++) {
1067                 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1068                 if (!XAllocColor(xw.dis, cmap, &color)) {
1069                         dc.col[i] = white;
1070                         fprintf(stderr, "Could not allocate color %d\n", i);
1071                 } else
1072                         dc.col[i] = color.pixel;
1073         }
1074 }
1075
1076 void
1077 xclear(int x1, int y1, int x2, int y2) {
1078         XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1079         XFillRectangle(xw.dis, xw.buf, dc.gc,
1080                        x1 * xw.cw, y1 * xw.ch,
1081                        (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1082 }
1083
1084 void
1085 xhints(void)
1086 {
1087         XClassHint class = {TNAME, TNAME};
1088         XWMHints wm = {.flags = InputHint, .input = 1};
1089         XSizeHints size = {
1090                 .flags = PSize | PResizeInc | PBaseSize,
1091                 .height = xw.h,
1092                 .width = xw.w,
1093                 .height_inc = xw.ch,
1094                 .width_inc = xw.cw,
1095                 .base_height = 2*BORDER,
1096                 .base_width = 2*BORDER,
1097         };
1098         XSetWMProperties(xw.dis, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1099 }
1100
1101 void
1102 xinit(void) {
1103         xw.dis = XOpenDisplay(NULL);
1104         xw.scr = XDefaultScreen(xw.dis);
1105         if(!xw.dis)
1106                 die("Can't open display\n");
1107
1108         /* font */
1109         if(!(dc.font = XLoadQueryFont(xw.dis, FONT)) || !(dc.bfont = XLoadQueryFont(xw.dis, BOLDFONT)))
1110                 die("Can't load font %s\n", dc.font ? BOLDFONT : FONT);
1111
1112         /* XXX: Assuming same size for bold font */
1113         xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing;
1114         xw.ch = dc.font->ascent + dc.font->descent;
1115
1116         /* colors */
1117         xloadcols();
1118
1119         term.c.attr.fg = DefaultFG;
1120         term.c.attr.bg = DefaultBG;
1121         term.c.attr.mode = ATTR_NULL;
1122         /* windows */
1123         xw.h = term.row * xw.ch + 2*BORDER;
1124         xw.w = term.col * xw.cw + 2*BORDER;
1125         xw.win = XCreateSimpleWindow(xw.dis, XRootWindow(xw.dis, xw.scr), 0, 0,
1126                         xw.w, xw.h, 0,
1127                         dc.col[DefaultBG],
1128                         dc.col[DefaultBG]);
1129         xw.bufw = xw.w - 2*BORDER;
1130         xw.bufh = xw.h - 2*BORDER;
1131         xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1132         /* gc */
1133         dc.gc = XCreateGC(xw.dis, xw.win, 0, NULL);
1134         XMapWindow(xw.dis, xw.win);
1135         xhints();
1136         XStoreName(xw.dis, xw.win, "st");
1137         XSync(xw.dis, 0);
1138 }
1139
1140 void
1141 xdraws(char *s, Glyph base, int x, int y, int len) {
1142         unsigned long xfg, xbg;
1143         int winx = x*xw.cw, winy = y*xw.ch + dc.font->ascent, width = len*xw.cw;
1144         int i;
1145
1146         if(base.mode & ATTR_REVERSE)
1147                 xfg = dc.col[base.bg], xbg = dc.col[base.fg];
1148         else
1149                 xfg = dc.col[base.fg], xbg = dc.col[base.bg];
1150
1151         XSetBackground(xw.dis, dc.gc, xbg);
1152         XSetForeground(xw.dis, dc.gc, xfg);
1153
1154         if(base.mode & ATTR_GFX)
1155                 for(i = 0; i < len; i++)
1156                         s[i] = gfx[(int)s[i]];
1157
1158         XSetFont(xw.dis, dc.gc, base.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1159         XDrawImageString(xw.dis, xw.buf, dc.gc, winx, winy, s, len);
1160
1161         if(base.mode & ATTR_UNDERLINE)
1162                 XDrawLine(xw.dis, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1163 }
1164
1165 void
1166 xcursor(int mode) {
1167         static int oldx = 0;
1168         static int oldy = 0;
1169         Glyph g = {' ', ATTR_NULL, DefaultBG, DefaultCS, 0};
1170
1171         LIMIT(oldx, 0, term.col-1);
1172         LIMIT(oldy, 0, term.row-1);
1173
1174         if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
1175                 g.c = term.line[term.c.y][term.c.x].c;
1176
1177         /* remove the old cursor */
1178         if(term.line[oldy][oldx].state & GLYPH_SET)
1179                 xdraws(&term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1);
1180         else
1181                 xclear(oldx, oldy, oldx, oldy);
1182
1183         /* draw the new one */
1184         if(mode == CURSOR_DRAW) {
1185                 xdraws(&g.c, g, term.c.x, term.c.y, 1);
1186                 oldx = term.c.x, oldy = term.c.y;
1187         }
1188 }
1189
1190 #ifdef DEBUG
1191 /* basic drawing routines */
1192 void
1193 xdrawc(int x, int y, Glyph g) {
1194         XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
1195         XSetBackground(xw.dis, dc.gc, dc.col[g.bg]);
1196         XSetForeground(xw.dis, dc.gc, dc.col[g.fg]);
1197         XSetFont(xw.dis, dc.gc, g.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1198         XDrawImageString(xw.dis, xw.buf, dc.gc, r.x, r.y+dc.font->ascent, &g.c, 1);
1199 }
1200
1201 void
1202 draw(int dummy) {
1203         int x, y;
1204
1205         xclear(0, 0, term.col-1, term.row-1);
1206         for(y = 0; y < term.row; y++)
1207                 for(x = 0; x < term.col; x++)
1208                         if(term.line[y][x].state & GLYPH_SET)
1209                                 xdrawc(x, y, term.line[y][x]);
1210
1211         if(!term.hidec)
1212                 xcursor(CURSOR_DRAW);
1213         XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1214         XFlush(xw.dis);
1215 }
1216
1217 #else
1218 /* optimized drawing routine */
1219 void
1220 draw(int redraw_all) {
1221         int i, x, y, ox;
1222         Glyph base, new;
1223         char buf[DRAW_BUF_SIZ];
1224
1225         XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1226         XFillRectangle(xw.dis, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
1227         for(y = 0; y < term.row; y++) {
1228                 base = term.line[y][0];
1229                 i = ox = 0;
1230                 for(x = 0; x < term.col; x++) {
1231                         new = term.line[y][x];
1232                         if(!ATTRCMP(base, new) && i < DRAW_BUF_SIZ)
1233                                 buf[i++] = new.c;
1234                         else {
1235                                 xdraws(buf, base, ox, y, i);
1236                                 buf[0] = new.c;
1237                                 i = 1;
1238                                 ox = x;
1239                                 base = new;
1240                         }
1241                 }
1242                 xdraws(buf, base, ox, y, i);
1243         }
1244         xcursor(term.hidec ? CURSOR_HIDE : CURSOR_DRAW);
1245         XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1246         XFlush(xw.dis);
1247 }
1248
1249 #endif
1250
1251 void
1252 expose(XEvent *ev) {
1253         draw(SCREEN_REDRAW);
1254 }
1255
1256 char*
1257 kmap(KeySym k) {
1258         int i;
1259         for(i = 0; i < LEN(key); i++)
1260                 if(key[i].k == k)
1261                         return (char*)key[i].s;
1262         return NULL;
1263 }
1264
1265 void
1266 kpress(XEvent *ev) {
1267         XKeyEvent *e = &ev->xkey;
1268         KeySym ksym;
1269         char buf[32];
1270         char *customkey;
1271         int len;
1272         int meta;
1273         int shift;
1274
1275         meta = e->state & Mod1Mask;
1276         shift = e->state & ShiftMask;
1277         len = XLookupString(e, buf, sizeof(buf), &ksym, NULL);
1278
1279         if((customkey = kmap(ksym)))
1280                 ttywrite(customkey, strlen(customkey));
1281         else if(len > 0) {
1282                 buf[sizeof(buf)-1] = '\0';
1283                 if(meta && len == 1)
1284                         ttywrite("\033", 1);
1285                 ttywrite(buf, len);
1286         } else
1287                 switch(ksym) {
1288                 case XK_Up:
1289                 case XK_Down:
1290                 case XK_Left:
1291                 case XK_Right:
1292                         sprintf(buf, "\033%c%c", term.mode & MODE_APPKEYPAD ? 'O' : '[', "DACB"[ksym - XK_Left]);
1293                         ttywrite(buf, 3);
1294                         break;
1295                 case XK_Insert:
1296                         if(shift)
1297                                 draw(1), puts("draw!")/* XXX: paste X clipboard */;
1298                         break;
1299                 default:
1300                         fprintf(stderr, "errkey: %d\n", (int)ksym);
1301                         break;
1302                 }
1303 }
1304
1305 void
1306 resize(XEvent *e) {
1307         int col, row;
1308
1309         if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
1310                 return;
1311
1312         xw.w = e->xconfigure.width;
1313         xw.h = e->xconfigure.height;
1314         xw.bufw = xw.w - 2*BORDER;
1315         xw.bufh = xw.h - 2*BORDER;
1316         col = xw.bufw / xw.cw;
1317         row = xw.bufh / xw.ch;
1318         tresize(col, row);
1319         ttyresize(col, row);
1320         XFreePixmap(xw.dis, xw.buf);
1321         xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1322         draw(SCREEN_REDRAW);
1323 }
1324
1325 void
1326 run(void) {
1327         XEvent ev;
1328         fd_set rfd;
1329         int xfd = XConnectionNumber(xw.dis);
1330
1331         running = 1;
1332         XSelectInput(xw.dis, xw.win, ExposureMask | KeyPressMask | StructureNotifyMask);
1333         XResizeWindow(xw.dis, xw.win, xw.w, xw.h); /* XXX: fix resize bug in wmii (?) */
1334
1335         while(running) {
1336                 FD_ZERO(&rfd);
1337                 FD_SET(cmdfd, &rfd);
1338                 FD_SET(xfd, &rfd);
1339                 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) == -1) {
1340                         if(errno == EINTR)
1341                                 continue;
1342                         die("select failed: %s\n", SERRNO);
1343                 }
1344                 if(FD_ISSET(cmdfd, &rfd)) {
1345                         ttyread();
1346                         draw(SCREEN_UPDATE);
1347                 }
1348                 while(XPending(xw.dis)) {
1349                         XNextEvent(xw.dis, &ev);
1350                         if(handler[ev.type])
1351                                 (handler[ev.type])(&ev);
1352                 }
1353         }
1354 }
1355
1356 int
1357 main(int argc, char *argv[]) {
1358         if(argc == 2 && !strncmp("-v", argv[1], 3))
1359                 die("st-" VERSION ", © 2009 st engineers\n");
1360         else if(argc != 1)
1361                 die("usage: st [-v]\n");
1362         setlocale(LC_CTYPE, "");
1363         tnew(80, 24);
1364         ttynew();
1365         xinit();
1366         run();
1367         return 0;
1368 }