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