st.c

   1 /* See LICENSE for licence details.  */
   2 #include "st.h"
   3
   4 /* Globals */
   5 DC dc;
   6 XWindow xw;
   7 Term term;
   8 Escseq escseq;
   9 int cmdfd;
  10 int running;
  11
  12 void
  13 die(const char *errstr, ...) {
  14         va_list ap;
  15
  16         va_start(ap, errstr);
  17         vfprintf(stderr, errstr, ap);
  18         va_end(ap);
  19         exit(EXIT_FAILURE);
  20 }
  21
  22 void
  23 execsh(void) {
  24         char *args[3] = {SHELL, "-i", NULL};
  25         putenv("TERM=" TNAME);
  26         execvp(SHELL, args);
  27 }
  28
  29 void
  30 xbell(void) {   /* visual bell */
  31         XRectangle r = { 0, 0, xw.w, xw.h };
  32         XSetForeground(xw.dis, dc.gc, dc.col[BellCol]);
  33         XFillRectangles(xw.dis, xw.win, dc.gc, &r, 1);
  34         XFlush(xw.dis);
  35         usleep(30000);
  36         draw(SCredraw);
  37 }
  38
  39 void
  40 ttynew(void) {
  41         int m, s;
  42         pid_t pid;
  43         char *pts;
  44
  45         if((m = posix_openpt(O_RDWR | O_NOCTTY)) < 0)
  46                 die("openpt");
  47         if(grantpt(m) == -1)
  48                 die("grandpt");
  49         if(unlockpt(m) == -1)
  50                 die("unlockpt");
  51         if((pts = ptsname(m)) == NULL)
  52                 die("ptsname");
  53         if((s = open(pts, O_RDWR | O_NOCTTY)) < 0)
  54                 die("slave open");
  55         fcntl(s, F_SETFL, O_NDELAY);
  56         switch(pid = fork()) {
  57         case -1:
  58                 die("fork");
  59                 break;
  60         case 0:
  61                 setsid(); /* create a new process group */
  62                 dup2(s, STDIN_FILENO);
  63                 dup2(s, STDOUT_FILENO);
  64                 dup2(s, STDERR_FILENO);
  65                 if(ioctl(s, TIOCSCTTY, NULL) < 0)
  66                         die("slave TTIOCSTTY");
  67                 execsh();
  68                 break;
  69         default:
  70                 close(s);
  71                 cmdfd = m;
  72         }
  73 }
  74
  75 void
  76 dump(char c) {
  77         static int col;
  78         fprintf(stderr, " %02x %c ", c, isprint(c)?c:'.');
  79         if(++col % 10 == 0)
  80                 fprintf(stderr, "\n");
  81 }
  82
  83 void
  84 ttyread(void) {
  85         char buf[BUFSIZ] = {0};
  86         int ret;
  87
  88         switch(ret = read(cmdfd, buf, BUFSIZ)) {
  89         case -1: /* error or exit */
  90                 /* XXX: be more precise */
  91                 running = 0;
  92                 break;
  93         default:
  94                 tputs(buf, ret);
  95         }
  96 }
  97
  98 void
  99 ttywrite(char *s, size_t n) {
 100         if(write(cmdfd, s, n) == -1)
 101                 die("write error on tty.");
 102 }
 103
 104 void
 105 ttyresize(int x, int y) {
 106         struct winsize w;
 107
 108         w.ws_row = term.row;
 109         w.ws_col = term.col;
 110         w.ws_xpixel = w.ws_ypixel = 0;
 111         if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
 112                 fprintf(stderr, "Couldn't set window size: %m\n");
 113 }
 114
 115 int
 116 escfinal(char c) {
 117         if(escseq.len == 1)
 118                 switch(c) {
 119                 case '[':
 120                 case ']':
 121                 case '(':
 122                         return 0;
 123                 case '=':
 124                 case '>':
 125                 default:
 126                         return 1;
 127                 }
 128         else if(BETWEEN(c, 0x40, 0x7E))
 129                 return 1;
 130         return 0;
 131 }
 132
 133 void
 134 tcpos(int mode) {
 135         static int x = 0;
 136         static int y = 0;
 137
 138         if(mode == CSsave)
 139                 x = term.c.x, y = term.c.y;
 140         else if(mode == CSload)
 141                 tmoveto(x, y);
 142 }
 143
 144 void
 145 tnew(int col, int row) {   /* screen size */
 146         term.row = row, term.col = col;
 147         term.top = 0, term.bot = term.row - 1;
 148         /* mode */
 149         term.mode = TMwrap;
 150         /* cursor */
 151         term.c.attr.mode = ATnone;
 152         term.c.attr.fg = DefaultFG;
 153         term.c.attr.bg = DefaultBG;
 154         term.c.x = term.c.y = 0;
 155         term.c.hidden = 0;
 156         /* allocate screen */
 157         term.line = calloc(term.row, sizeof(Line));
 158         for(row = 0 ; row < term.row; row++)
 159                 term.line[row] = calloc(term.col, sizeof(Glyph));
 160 }
 161
 162 void
 163 tscroll(void) {
 164         Line temp = term.line[term.top];
 165         int i;
 166
 167         for(i = term.top; i < term.bot; i++)
 168                 term.line[i] = term.line[i+1];
 169         memset(temp, 0, sizeof(Glyph) * term.col);
 170         term.line[term.bot] = temp;
 171         xscroll();
 172 }
 173
 174 void
 175 tnewline(void) {
 176         int y = term.c.y + 1;
 177
 178         if(y > term.bot) {
 179                 tscroll(), y = term.bot;
 180         }
 181         tmoveto(0, y);
 182 }
 183
 184 int
 185 escaddc(char c) {
 186         escseq.buf[escseq.len++] = c;
 187         if(escfinal(c) || escseq.len >= ESCSIZ) {
 188                 escparse(), eschandle();
 189                 return 0;
 190         }
 191         return 1;
 192 }
 193
 194 void
 195 escparse(void) {
 196         /* int noarg = 1; */
 197         char *p = escseq.buf;
 198
 199         escseq.narg = 0;
 200         switch(escseq.pre = *p++) {
 201         case '[': /* CSI */
 202                 if(*p == '?')
 203                         escseq.priv = 1, p++;
 204
 205                 while(p < escseq.buf+escseq.len) {
 206                         while(isdigit(*p)) {
 207                                 escseq.arg[escseq.narg] *= 10;
 208                                 escseq.arg[escseq.narg] += *(p++) - '0'/*, noarg = 0 */;
 209                         }
 210                         if(*p == ';')
 211                                 escseq.narg++, p++;
 212                         else {
 213                                 escseq.mode = *p;
 214                                 escseq.narg++;
 215                                 return;
 216                         }
 217                 }
 218                 break;
 219         case '(':
 220                 /* humf charset stuff */
 221                 break;
 222         }
 223 }
 224
 225 void
 226 tmoveto(int x, int y) {
 227         term.c.x = x < 0 ? 0 : x >= term.col ? term.col-1 : x;
 228         term.c.y = y < 0 ? 0 : y >= term.row ? term.row-1 : y;
 229 }
 230
 231 void
 232 tcursor(int dir) {
 233         int xi = term.c.x, yi = term.c.y;
 234         int xf = xi, yf = yi;
 235
 236         switch(dir) {
 237         case CSup:
 238                 yf--;
 239                 break;
 240         case CSdown:
 241                 yf++;
 242                 break;
 243         case CSleft:
 244                 xf--;
 245                 if(xf < 0) {
 246                         xf = term.col-1, yf--;
 247                         if(yf < term.top)
 248                                 yf = term.top, xf = 0;
 249                 }
 250                 break;
 251         case CSright:
 252                 xf++;
 253                 if(xf >= term.col) {
 254                         xf = 0, yf++;
 255                         if(yf > term.bot)
 256                                 yf = term.bot, tscroll();
 257                 }
 258                 break;
 259         }
 260         tmoveto(xf, yf);
 261 }
 262
 263 void
 264 tsetchar(char c) {
 265         term.line[term.c.y][term.c.x] = term.c.attr;
 266         term.line[term.c.y][term.c.x].c = c;
 267         term.line[term.c.y][term.c.x].state |= CRset | CRupdate;
 268 }
 269
 270 void
 271 tclearregion(int x1, int y1, int x2, int y2) {
 272         int x, y;
 273
 274         LIMIT(x1, 0, term.col-1);
 275         LIMIT(x2, 0, term.col-1);
 276         LIMIT(y1, 0, term.row-1);
 277         LIMIT(y2, 0, term.row-1);
 278
 279         /* XXX: could be optimized */
 280         for(x = x1; x <= x2; x++)
 281                 for(y = y1; y <= y2; y++)
 282                         memset(&term.line[y][x], 0, sizeof(Glyph));
 283
 284         xclear(x1, y1, x2, y2);
 285 }
 286
 287 void
 288 tdeletechar(int n) {
 289         int src = term.c.x + n;
 290         int dst = term.c.x;
 291         int size = term.col - src;
 292
 293         if(src >= term.col) {
 294                 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
 295                 return;
 296         }
 297         memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
 298         tclearregion(term.col-size, term.c.y, term.col-1, term.c.y);
 299 }
 300
 301 void
 302 tinsertblank(int n) {
 303         int src = term.c.x;
 304         int dst = src + n;
 305         int size = term.col - n - src;
 306
 307         if(dst >= term.col) {
 308                 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
 309                 return;
 310         }
 311         memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
 312         tclearregion(src, term.c.y, dst, term.c.y);
 313 }
 314
 315 void
 316 tinsertblankline (int n) {
 317         int i;
 318         Line blank;
 319         int bot = term.bot;
 320
 321         if(term.c.y > term.bot)
 322                 bot = term.row - 1;
 323         else if(term.c.y < term.top)
 324                 bot = term.top - 1;
 325         if(term.c.y + n >= bot) {
 326                 tclearregion(0, term.c.y, term.col-1, bot);
 327                 return;
 328         }
 329         for(i = bot; i >= term.c.y+n; i--) {
 330                 /* swap deleted line <-> blanked line */
 331                 blank = term.line[i];
 332                 term.line[i] = term.line[i-n];
 333                 term.line[i-n] = blank;
 334                 /* blank it */
 335                 memset(blank, 0, term.col * sizeof(Glyph));
 336         }
 337 }
 338
 339
 340 void
 341 tdeleteline(int n) {
 342         int i;
 343         Line blank;
 344         int bot = term.bot;
 345
 346         if(term.c.y > term.bot)
 347                 bot = term.row - 1;
 348         else if(term.c.y < term.top)
 349                 bot = term.top - 1;
 350         if(term.c.y + n >= bot) {
 351                 tclearregion(0, term.c.y, term.col-1, bot);
 352                 return;
 353         }
 354         for(i = term.c.y; i <= bot-n; i++) {
 355                 /* swap deleted line <-> blanked line */
 356                 blank = term.line[i];
 357                 term.line[i] = term.line[i+n];
 358                 term.line[i+n] = blank;
 359                 /* blank it */
 360                 memset(blank, 0, term.col * sizeof(Glyph));
 361         }
 362 }
 363
 364 void
 365 tsetattr(int *attr, int l) {
 366         int i;
 367
 368 #ifdef TRUECOLOR /* ESC [ ? <fg/bg> ; <r> ; <g> ; <b> m */
 369         Color col;
 370         if(escseq.priv && escseq.len == 4) { /* True color extension :) */
 371                 col = (escseq.arg[1]<<16) + (escseq.arg[2]<<8) + escseq.arg[3];
 372                 switch(escseq.arg[0]) {
 373                 case 3: /* foreground */
 374                         term.c.attr.fg = col;
 375                         break;
 376                 case 4: /* background */
 377                         term.c.attr.bg = col;
 378                         break;
 379                 }
 380         }
 381         else
 382 #endif
 383                 for(i = 0; i < l; i++) {
 384                         switch(attr[i]) {
 385                         case 0:
 386                                 memset(&term.c.attr, 0, sizeof(term.c.attr));
 387                                 term.c.attr.fg = DefaultFG;
 388                                 term.c.attr.bg = DefaultBG;
 389                                 break;
 390                         case 1:
 391                                 term.c.attr.mode |= ATbold;
 392                                 break;
 393                         case 4:
 394                                 term.c.attr.mode |= ATunderline;
 395                                 break;
 396                         case 7:
 397                                 term.c.attr.mode |= ATreverse;
 398                                 break;
 399                         case 8:
 400                                 term.c.hidden = CShide;
 401                                 break;
 402                         case 22:
 403                                 term.c.attr.mode &= ~ATbold;
 404                                 break;
 405                         case 24:
 406                                 term.c.attr.mode &= ~ATunderline;
 407                                 break;
 408                         case 27:
 409                                 term.c.attr.mode &= ~ATreverse;
 410                                 break;
 411                         case 39:
 412                                 term.c.attr.fg = DefaultFG;
 413                                 break;
 414                         case 49:
 415                                 term.c.attr.fg = DefaultBG;
 416                                 break;
 417                         default:
 418                                 if(BETWEEN(attr[i], 30, 37))
 419                                         term.c.attr.fg = attr[i] - 30;
 420                                 else if(BETWEEN(attr[i], 40, 47))
 421                                         term.c.attr.bg = attr[i] - 40;
 422                                 break;
 423                         }
 424                 }
 425 }
 426
 427 void
 428 tsetscroll(int t, int b) {
 429         int temp;
 430
 431         LIMIT(t, 0, term.row-1);
 432         LIMIT(b, 0, term.row-1);
 433         if(t > b) {
 434                 temp = t;
 435                 t = b;
 436                 b = temp;
 437         }
 438         term.top = t;
 439         term.bot = b;
 440 }
 441
 442
 443 void
 444 eschandle(void) {
 445         /* escdump(); */
 446         switch(escseq.pre) {
 447         case '[':
 448                 switch(escseq.mode) {
 449                 case '@': /* Insert <n> blank char */
 450                         DEFAULT(escseq.arg[0], 1);
 451                         tinsertblank(escseq.arg[0]);
 452                         break;
 453                 case 'A': /* Cursor <n> Up */
 454                 case 'e':
 455                         DEFAULT(escseq.arg[0], 1);
 456                         tmoveto(term.c.x, term.c.y-escseq.arg[0]);
 457                         break;
 458                 case 'B': /* Cursor <n> Down */
 459                         DEFAULT(escseq.arg[0], 1);
 460                         tmoveto(term.c.x, term.c.y+escseq.arg[0]);
 461                         break;
 462                 case 'C': /* Cursor <n> Forward */
 463                 case 'a':
 464                         DEFAULT(escseq.arg[0], 1);
 465                         tmoveto(term.c.x+escseq.arg[0], term.c.y);
 466                         break;
 467                 case 'D': /* Cursor <n> Backward */
 468                         DEFAULT(escseq.arg[0], 1);
 469                         tmoveto(term.c.x-escseq.arg[0], term.c.y);
 470                         break;
 471                 case 'E': /* Cursor <n> Down and first col */
 472                         DEFAULT(escseq.arg[0], 1);
 473                         tmoveto(0, term.c.y+escseq.arg[0]);
 474                         break;
 475                 case 'F': /* Cursor <n> Up and first col */
 476                         DEFAULT(escseq.arg[0], 1);
 477                         tmoveto(0, term.c.y-escseq.arg[0]);
 478                         break;
 479                 case 'G': /* Move to <col> */
 480                 case '`':
 481                         DEFAULT(escseq.arg[0], 1);
 482                         tmoveto(escseq.arg[0]-1, term.c.y);
 483                         break;
 484                 case 'H': /* Move to <row> <col> */
 485                 case 'f':
 486                         DEFAULT(escseq.arg[0], 1);
 487                         DEFAULT(escseq.arg[1], 1);
 488                         tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
 489                         break;
 490                 case 'J': /* Clear screen */
 491                         switch(escseq.arg[0]) {
 492                         case 0: /* below */
 493                                 tclearregion(term.c.x, term.c.y, term.col-1, term.row-1);
 494                                 break;
 495                         case 1: /* above */
 496                                 tclearregion(0, 0, term.c.x, term.c.y);
 497                                 break;
 498                         case 2: /* all */
 499                                 tclearregion(0, 0, term.col-1, term.row-1);
 500                                 break;
 501                         }
 502                         break;
 503                 case 'K': /* Clear line */
 504                         switch(escseq.arg[0]) {
 505                         case 0: /* right */
 506                                 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
 507                                 break;
 508                         case 1: /* left */
 509                                 tclearregion(0, term.c.y, term.c.x, term.c.y);
 510                                 break;
 511                         case 2: /* all */
 512                                 tclearregion(0, term.c.y, term.col-1, term.c.y);
 513                                 break;
 514                         }
 515                         break;
 516                 case 'L': /* Insert <n> blank lines */
 517                         DEFAULT(escseq.arg[0], 1);
 518                         tinsertblankline(escseq.arg[0]);
 519                         break;
 520                 case 'M': /* Delete <n> lines */
 521                         DEFAULT(escseq.arg[0], 1);
 522                         tdeleteline(escseq.arg[0]);
 523                         break;
 524                 case 'P': /* Delete <n> char */
 525                         DEFAULT(escseq.arg[0], 1);
 526                         tdeletechar(escseq.arg[0]);
 527                         break;
 528                 case 'd': /* Move to <row> */
 529                         DEFAULT(escseq.arg[0], 1);
 530                         tmoveto(term.c.x, escseq.arg[0]-1);
 531                         break;
 532                 case 'h': /* Set terminal mode */
 533                         break;
 534                 case 'm': /* Terminal attribute (color) */
 535                         tsetattr(escseq.arg, escseq.narg);
 536                         break;
 537                 case 'r':
 538                         if(escseq.priv)
 539                                 ;
 540                         else {
 541                                 DEFAULT(escseq.arg[0], 1);
 542                                 DEFAULT(escseq.arg[1], term.row);
 543                                 tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
 544                         }
 545                         break;
 546                 case 's': /* Save cursor position */
 547                         tcpos(CSsave);
 548                         break;
 549                 case 'u': /* Load cursor position */
 550                         tcpos(CSload);
 551                         break;
 552                 }
 553                 break;
 554         }
 555 }
 556
 557 void
 558 escdump(void) {
 559         int i;
 560         puts("------");
 561         printf("rawbuf  : %s\n", escseq.buf);
 562         printf("prechar : %c\n", escseq.pre);
 563         printf("private : %c\n", escseq.priv ? '?' : ' ');
 564         printf("narg    : %d\n", escseq.narg);
 565         if(escseq.narg) {
 566                 for(i = 0; i < escseq.narg; i++)
 567                         printf("\targ %d = %d\n", i, escseq.arg[i]);
 568         }
 569         printf("mode    : %c\n", escseq.mode);
 570 }
 571
 572 void
 573 escreset(void) {
 574         memset(&escseq, 0, sizeof(escseq));
 575 }
 576
 577 void
 578 tputc(char c) {
 579         static int inesc = 0;
 580
 581         dump(c);
 582         /* start of escseq */
 583         if(c == '\033')
 584                 escreset(), inesc = 1;
 585         else if(inesc) {
 586                 inesc = escaddc(c);
 587         } /* normal char */
 588         else switch(c) {
 589                 default:
 590                         tsetchar(c);
 591                         tcursor(CSright);
 592                         break;
 593                 case '\b':
 594                         tcursor(CSleft);
 595                         break;
 596                 case '\r':
 597                         tmoveto(0, term.c.y);
 598                         break;
 599                 case '\n':
 600                         tnewline();
 601                         break;
 602                 case '\a':
 603                         xbell();
 604                         break;
 605         }
 606 }
 607
 608 void
 609 tputs(char *s, int len) {
 610         for(; len > 0; len--)
 611                 tputc(*s++);
 612 }
 613
 614 void
 615 tdump(void) {
 616         int row, col;
 617         Glyph c;
 618
 619         for(row = 0; row < term.row; row++) {
 620                 for(col = 0; col < term.col; col++) {
 621                         if(col == term.c.x && row == term.c.y)
 622                                 putchar('#');
 623                         else {
 624                                 c = term.line[row][col];
 625                                 putchar(c.state & CRset ? c.c : '.');
 626                         }
 627                 }
 628                 putchar('\n');
 629         }
 630 }
 631
 632 void
 633 tresize(int col, int row) {
 634         int i;
 635         Line *line;
 636         int minrow = MIN(row, term.row);
 637         int mincol = MIN(col, term.col);
 638
 639         if(col < 1 || row < 1)
 640                 return;
 641         line = calloc(row, sizeof(Line));
 642         for(i = 0 ; i < row; i++)
 643                 line[i] = calloc(col, sizeof(Glyph));
 644         for(i = 0 ; i < minrow; i++) {
 645                 memcpy(line[i], term.line[i], mincol * sizeof(Glyph));
 646                 free(term.line[i]);
 647         }
 648         free(term.line);
 649         LIMIT(term.c.x, 0, col-1);
 650         LIMIT(term.c.y, 0, row-1);
 651         LIMIT(term.top, 0, row-1);
 652         LIMIT(term.bot, 0, row-1);
 653         //    if(term.bot == term.row-1)
 654         term.bot = row-1;
 655         term.line = line;
 656         term.col = col, term.row = row;
 657 }
 658
 659 unsigned long
 660 xgetcol(const char *s) {
 661         XColor color;
 662         Colormap cmap = DefaultColormap(xw.dis, xw.scr);
 663
 664         if(!XAllocNamedColor(xw.dis, cmap, s, &color, &color)) {
 665                 color.pixel = WhitePixel(xw.dis, xw.scr);
 666                 fprintf(stderr, "Could not allocate color '%s'\n", s);
 667         }
 668         return color.pixel;
 669 }
 670
 671
 672 void
 673 xclear(int x1, int y1, int x2, int y2) {
 674         XClearArea(xw.dis, xw.win,
 675                         x1 * xw.cw, y1 * xw.ch,
 676                         (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch,
 677                         False);
 678 }
 679
 680
 681 void
 682 xscroll(void) {
 683         int srcy = (term.top+1) * xw.ch;
 684         int dsty = term.top * xw.ch;
 685         int height = (term.bot-term.top) * xw.ch;
 686
 687         xcursor(CShide);
 688         XCopyArea(xw.dis, xw.win, xw.win, dc.gc, 0, srcy, xw.w, height, 0, dsty);
 689         xclear(0, term.bot, term.col-1, term.bot);
 690 }
 691
 692
 693
 694
 695 void
 696 xinit(void) {
 697         XGCValues values;
 698         unsigned long valuemask;
 699         XClassHint chint;
 700         XWMHints wmhint;
 701         XSizeHints shint;
 702         char *args[] = {NULL};
 703         int i;
 704
 705         xw.dis = XOpenDisplay(NULL);
 706         xw.scr = XDefaultScreen(xw.dis);
 707         /* font */
 708         dc.font = XLoadQueryFont(xw.dis, FONT);
 709         xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing;
 710         xw.ch = dc.font->ascent + dc.font->descent + LINESPACE;
 711         /* colors */
 712         for(i = 0; i < LEN(colorname); i++)
 713                 dc.col[i] = xgetcol(colorname[i]);
 714         term.c.attr.fg = DefaultFG;
 715         term.c.attr.bg = DefaultBG;
 716         term.c.attr.mode = ATnone;
 717         /* windows */
 718         xw.h = term.row * xw.ch;
 719         xw.w = term.col * xw.cw;
 720         /* XXX: this BORDER is useless after the first resize, handle it in xdraws() */
 721         xw.win = XCreateSimpleWindow(xw.dis, XRootWindow(xw.dis, xw.scr), 0, 0,
 722                         xw.w, xw.h, BORDER,
 723                         dc.col[DefaultBG],
 724                         dc.col[DefaultBG]);
 725         /* gc */
 726         values.foreground = XWhitePixel(xw.dis, xw.scr);
 727         values.font = dc.font->fid;
 728         valuemask = GCForeground | GCFont;
 729         dc.gc = XCreateGC(xw.dis, xw.win, valuemask, &values);
 730         XMapWindow(xw.dis, xw.win);
 731         /* wm stuff */
 732         chint.res_name = TNAME, chint.res_class = TNAME;
 733         wmhint.input = 1, wmhint.flags = InputHint;
 734         shint.height_inc = xw.ch, shint.width_inc = xw.cw;
 735         shint.height = xw.h, shint.width = xw.w;
 736         shint.flags = PSize | PResizeInc;
 737         XSetWMProperties(xw.dis, xw.win, NULL, NULL, &args[0], 0, &shint, &wmhint, &chint);
 738         XStoreName(xw.dis, xw.win, TNAME);
 739         XSync(xw.dis, 0);
 740 }
 741
 742 void
 743 xdrawc(int x, int y, Glyph g) {
 744         XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
 745         unsigned long xfg, xbg;
 746
 747         /* reverse video */
 748         if(g.mode & ATreverse)
 749                 xfg = dc.col[g.bg], xbg = dc.col[g.fg];
 750         else
 751                 xfg = dc.col[g.fg], xbg = dc.col[g.bg];
 752         /* background */
 753         XSetForeground(xw.dis, dc.gc, xbg);
 754         XFillRectangles(xw.dis, xw.win, dc.gc, &r, 1);
 755         /* string */
 756         XSetForeground(xw.dis, dc.gc, xfg);
 757         XDrawString(xw.dis, xw.win, dc.gc, r.x, r.y+dc.font->ascent, &(g.c), 1);
 758         if(g.mode & ATbold)  /* XXX: bold hack (draw again at x+1) */
 759                 XDrawString(xw.dis, xw.win, dc.gc, r.x+1, r.y+dc.font->ascent, &(g.c), 1);
 760         /* underline */
 761         if(g.mode & ATunderline) {
 762                 r.y += dc.font->ascent + 1;
 763                 XDrawLine(xw.dis, xw.win, dc.gc, r.x, r.y, r.x+r.width-1, r.y);
 764         }
 765 }
 766
 767 void
 768 xcursor(int mode) {
 769         static int oldx = 0;
 770         static int oldy = 0;
 771         Glyph g = {' ', ATnone, DefaultBG, DefaultCS, 0};
 772
 773         if(term.line[term.c.y][term.c.x].state & CRset)
 774                 g.c = term.line[term.c.y][term.c.x].c;
 775         /* remove the old cursor */
 776         if(term.line[oldy][oldx].state & CRset)
 777                 xdrawc(oldx, oldy, term.line[oldy][oldx]);
 778         else xclear(oldx, oldy, oldx, oldy); /* XXX: maybe a bug */
 779         if(mode == CSdraw && !term.c.hidden) {
 780                 xdrawc(term.c.x, term.c.y, g);
 781                 oldx = term.c.x, oldy = term.c.y;
 782         }
 783 }
 784
 785
 786 void
 787 draw(int redraw_all) {
 788         int x, y;
 789         int changed, set;
 790
 791         if(redraw_all)
 792                 XClearWindow(xw.dis, xw.win);
 793         /* XXX: drawing could be optimised */
 794         for(y = 0; y < term.row; y++) {
 795                 for(x = 0; x < term.col; x++) {
 796                         changed = term.line[y][x].state & CRupdate;
 797                         set = term.line[y][x].state & CRset;
 798                         if((changed && set) || (redraw_all && set)) {
 799                                 term.line[y][x].state &= ~CRupdate;
 800                                 xdrawc(x, y, term.line[y][x]);
 801                         }
 802                 }
 803         }
 804         xcursor(CSdraw);
 805 }
 806
 807 void
 808 kpress(XKeyEvent *e) {
 809         KeySym ksym;
 810         char buf[32];
 811         int len;
 812         int meta;
 813         int shift;
 814
 815         meta  = e->state & Mod4Mask;
 816         shift = e->state & ShiftMask;
 817         len = XLookupString(e, buf, sizeof(buf), &ksym, NULL);
 818         if(len > 0) {
 819                 buf[sizeof(buf)-1] = '\0';
 820                 if(meta && len == 1)
 821                         ttywrite("\033", 1);
 822                 ttywrite(buf, len);
 823                 return;
 824         }
 825         switch(ksym) {
 826 #ifdef DEBUG1
 827         default:
 828                 printf("errkey: %d\n", (int)ksym);
 829                 break;
 830 #endif
 831         case XK_Up:
 832         case XK_Down:
 833         case XK_Left:
 834         case XK_Right:
 835                 sprintf(buf, "\033[%c", "DACB"[ksym - XK_Left]);
 836                 ttywrite(buf, 3);
 837                 break;
 838         case XK_Delete: ttywrite(KEYDELETE, sizeof(KEYDELETE)-1); break;
 839         case XK_Home:   ttywrite(  KEYHOME, sizeof(  KEYHOME)-1); break;
 840         case XK_End:    ttywrite(   KEYEND, sizeof(   KEYEND)-1); break;
 841         case XK_Prior:  ttywrite(  KEYPREV, sizeof(  KEYPREV)-1); break;
 842         case XK_Next:   ttywrite(  KEYNEXT, sizeof(  KEYNEXT)-1); break;
 843         case XK_Insert:
 844                 /* XXX: paste X clipboard */
 845                 if(shift);
 846                 break;
 847         }
 848 }
 849
 850 void
 851 resize(XEvent *e) {
 852         int col, row;
 853         col = e->xconfigure.width / xw.cw;
 854         row = e->xconfigure.height / xw.ch;
 855
 856         if(term.col != col && term.row != row) {
 857                 tresize(col, row);
 858                 ttyresize(col, row);
 859                 xw.w = e->xconfigure.width;
 860                 xw.h = e->xconfigure.height;
 861                 draw(SCredraw);
 862         }
 863 }
 864
 865
 866 void
 867 run(void) {
 868         int ret;
 869         XEvent ev;
 870         fd_set rfd;
 871         struct timeval tv = {0, 10000};
 872
 873         running = 1;
 874         XSelectInput(xw.dis, xw.win, ExposureMask | KeyPressMask | StructureNotifyMask);
 875         XResizeWindow(xw.dis, xw.win, xw.w , xw.h); /* seems to fix the resize bug in wmii */
 876         while(running) {
 877                 while(XPending(xw.dis)) {
 878                         XNextEvent(xw.dis, &ev);
 879                         switch (ev.type) {
 880                         default:
 881                                 break;
 882                         case KeyPress:
 883                                 kpress(&ev.xkey);
 884                                 break;
 885                         case Expose:
 886                                 draw(SCredraw);
 887                                 break;
 888                         case ConfigureNotify:
 889                                 resize(&ev);
 890                                 break;
 891                         }
 892                 }
 893                 FD_ZERO(&rfd);
 894                 FD_SET(cmdfd, &rfd);
 895                 ret = select(cmdfd+1, &rfd, NULL, NULL, &tv);
 896                 if(ret < 0) {
 897                         fprintf(stderr, "select: %m\n");
 898                         running = 0;
 899                 }
 900                 if(!ret)
 901                         continue;
 902                 if(FD_ISSET(cmdfd, &rfd)) {
 903                         ttyread();
 904                         draw(SCupdate);
 905                 }
 906         }
 907 }
 908
 909 int
 910 main(int argc, char *argv[]) {
 911         if(argc == 2 && !strncmp("-v", argv[1], 3))
 912                 die("st-"VERSION", © 2009 st engineers\n");
 913         else if(argc != 1)
 914                 die("usage: st [-v]\n");
 915         setlocale(LC_CTYPE, "");
 916         tnew(80, 24);
 917         ttynew();
 918         xinit();
 919         run();
 920         return 0;
 921 }