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         usleep(30000);
  35         draw(SCredraw);
  36 }
  37
  38 void
  39 ttynew(void) {
  40         int m, s;
  41         pid_t pid;
  42         char *pts;
  43
  44         if((m = posix_openpt(O_RDWR | O_NOCTTY)) < 0)
  45                 die("openpt");
  46         if(grantpt(m) == -1)
  47                 die("grandpt");
  48         if(unlockpt(m) == -1)
  49                 die("unlockpt");
  50         if((pts = ptsname(m)) == NULL)
  51                 die("ptsname");
  52         if((s = open(pts, O_RDWR | O_NOCTTY)) < 0)
  53                 die("slave open");
  54         fcntl(s, F_SETFL, O_NDELAY);
  55         switch(pid = fork()) {
  56         case -1:
  57                 die("fork");
  58                 break;
  59         case 0:
  60                 setsid(); /* create a new process group */
  61                 dup2(s, STDIN_FILENO);
  62                 dup2(s, STDOUT_FILENO);
  63                 dup2(s, STDERR_FILENO);
  64                 if(ioctl(s, TIOCSCTTY, NULL) < 0)
  65                         die("slave TTIOCSTTY");
  66                 execsh();
  67                 break;
  68         default:
  69                 close(s);
  70                 cmdfd = m;
  71         }
  72 }
  73
  74 void
  75 dump(char c) {
  76         static int col;
  77         fprintf(stderr, " %02x %c ", c, isprint(c)?c:'.');
  78         if(++col % 10 == 0)
  79                 fprintf(stderr, "\n");
  80 }
  81
  82 void
  83 ttyread(void) {
  84         char buf[BUFSIZ] = {0};
  85         int ret;
  86
  87         switch(ret = read(cmdfd, buf, BUFSIZ)) {
  88         case -1: /* error or exit */
  89                 /* XXX: be more precise */
  90                 running = 0;
  91                 break;
  92         default:
  93                 tputs(buf, ret);
  94         }
  95 }
  96
  97 void
  98 ttywrite(char *s, size_t n) {
  99         if(write(cmdfd, s, n) == -1)
 100                 die("write error on tty.");
 101 }
 102
 103 void
 104 ttyresize(int x, int y) {
 105         struct winsize w;
 106
 107         w.ws_row = term.row;
 108         w.ws_col = term.col;
 109         w.ws_xpixel = w.ws_ypixel = 0;
 110         if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
 111                 fprintf(stderr, "Couldn't set window size: %m\n");
 112 }
 113
 114 int
 115 escfinal(char c) {
 116         if(escseq.len == 1)
 117                 switch(c) {
 118                 case '[':
 119                 case ']':
 120                 case '(':
 121                         return 0;
 122                 case '=':
 123                 case '>':
 124                 default:
 125                         return 1;
 126                 }
 127         else if(BETWEEN(c, 0x40, 0x7E))
 128                 return 1;
 129         return 0;
 130 }
 131
 132 void
 133 tcpos(int mode) {
 134         static int x = 0;
 135         static int y = 0;
 136
 137         if(mode == CSsave)
 138                 x = term.c.x, y = term.c.y;
 139         else if(mode == CSload)
 140                 tmoveto(x, y);
 141 }
 142
 143 void
 144 tnew(int col, int row) {   /* screen size */
 145         term.row = row, term.col = col;
 146         term.top = 0, term.bot = term.row - 1;
 147         /* mode */
 148         term.mode = TMwrap;
 149         /* cursor */
 150         term.c.attr.mode = ATnone;
 151         term.c.attr.fg = DefaultFG;
 152         term.c.attr.bg = DefaultBG;
 153         term.c.x = term.c.y = 0;
 154         term.c.hidden = 0;
 155         /* allocate screen */
 156         term.line = calloc(term.row, sizeof(Line));
 157         for(row = 0 ; row < term.row; row++)
 158                 term.line[row] = calloc(term.col, sizeof(Glyph));
 159 }
 160
 161 void
 162 tscroll(void) {
 163         Line temp = term.line[term.top];
 164         int i;
 165
 166         for(i = term.top; i < term.bot; i++)
 167                 term.line[i] = term.line[i+1];
 168         memset(temp, 0, sizeof(Glyph) * term.col);
 169         term.line[term.bot] = temp;
 170         xscroll();
 171 }
 172
 173 void
 174 tnewline(void) {
 175         int y = term.c.y + 1;
 176
 177         if(y > term.bot) {
 178                 tscroll(), y = term.bot;
 179         }
 180         tmoveto(0, y);
 181 }
 182
 183 int
 184 escaddc(char c) {
 185         escseq.buf[escseq.len++] = c;
 186         if(escfinal(c) || escseq.len >= ESCSIZ) {
 187                 escparse(), eschandle();
 188                 return 0;
 189         }
 190         return 1;
 191 }
 192
 193 void
 194 escparse(void) {
 195         /* int noarg = 1; */
 196         char *p = escseq.buf;
 197
 198         escseq.narg = 0;
 199         switch(escseq.pre = *p++) {
 200         case '[': /* CSI */
 201                 if(*p == '?')
 202                         escseq.priv = 1, p++;
 203
 204                 while(p < escseq.buf+escseq.len) {
 205                         while(isdigit(*p)) {
 206                                 escseq.arg[escseq.narg] *= 10;
 207                                 escseq.arg[escseq.narg] += *(p++) - '0'/*, noarg = 0 */;
 208                         }
 209                         if(*p == ';')
 210                                 escseq.narg++, p++;
 211                         else {
 212                                 escseq.mode = *p;
 213                                 escseq.narg++;
 214                                 return;
 215                         }
 216                 }
 217                 break;
 218         case '(':
 219                 /* XXX: graphic character set */
 220                 break;
 221         }
 222 }
 223
 224 void
 225 tmoveto(int x, int y) {
 226         term.c.x = x < 0 ? 0 : x >= term.col ? term.col-1 : x;
 227         term.c.y = y < 0 ? 0 : y >= term.row ? term.row-1 : y;
 228 }
 229
 230 void
 231 tcursor(int dir) {
 232         int xf = term.c.x, yf = term.c.y;
 233
 234         switch(dir) {
 235         case CSup:
 236                 yf--;
 237                 break;
 238         case CSdown:
 239                 yf++;
 240                 break;
 241         case CSleft:
 242                 xf--;
 243                 if(xf < 0) {
 244                         xf = term.col-1, yf--;
 245                         if(yf < term.top)
 246                                 yf = term.top, xf = 0;
 247                 }
 248                 break;
 249         case CSright:
 250                 xf++;
 251                 if(xf >= term.col) {
 252                         xf = 0, yf++;
 253                         if(yf > term.bot)
 254                                 yf = term.bot, tscroll();
 255                 }
 256                 break;
 257         }
 258         tmoveto(xf, yf);
 259 }
 260
 261 void
 262 tsetchar(char c) {
 263         term.line[term.c.y][term.c.x] = term.c.attr;
 264         term.line[term.c.y][term.c.x].c = c;
 265         term.line[term.c.y][term.c.x].state |= CRset | CRupdate;
 266 }
 267
 268 void
 269 tclearregion(int x1, int y1, int x2, int y2) {
 270         int x, y;
 271
 272         LIMIT(x1, 0, term.col-1);
 273         LIMIT(x2, 0, term.col-1);
 274         LIMIT(y1, 0, term.row-1);
 275         LIMIT(y2, 0, term.row-1);
 276
 277         /* XXX: could be optimized */
 278         for(x = x1; x <= x2; x++)
 279                 for(y = y1; y <= y2; y++)
 280                         memset(&term.line[y][x], 0, sizeof(Glyph));
 281
 282         xclear(x1, y1, x2, y2);
 283 }
 284
 285 void
 286 tdeletechar(int n) {
 287         int src = term.c.x + n;
 288         int dst = term.c.x;
 289         int size = term.col - src;
 290
 291         if(src >= term.col) {
 292                 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
 293                 return;
 294         }
 295         memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
 296         tclearregion(term.col-size, term.c.y, term.col-1, term.c.y);
 297 }
 298
 299 void
 300 tinsertblank(int n) {
 301         int src = term.c.x;
 302         int dst = src + n;
 303         int size = term.col - n - src;
 304
 305         if(dst >= term.col) {
 306                 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
 307                 return;
 308         }
 309         memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
 310         tclearregion(src, term.c.y, dst, term.c.y);
 311 }
 312
 313 void
 314 tinsertblankline (int n) {
 315         int i;
 316         Line blank;
 317         int bot = term.bot;
 318
 319         if(term.c.y > term.bot)
 320                 bot = term.row - 1;
 321         else if(term.c.y < term.top)
 322                 bot = term.top - 1;
 323         if(term.c.y + n >= bot) {
 324                 tclearregion(0, term.c.y, term.col-1, bot);
 325                 return;
 326         }
 327         for(i = bot; i >= term.c.y+n; i--) {
 328                 /* swap deleted line <-> blanked line */
 329                 blank = term.line[i];
 330                 term.line[i] = term.line[i-n];
 331                 term.line[i-n] = blank;
 332                 /* blank it */
 333                 memset(blank, 0, term.col * sizeof(Glyph));
 334         }
 335 }
 336
 337
 338 void
 339 tdeleteline(int n) {
 340         int i;
 341         Line blank;
 342         int bot = term.bot;
 343
 344         if(term.c.y > term.bot)
 345                 bot = term.row - 1;
 346         else if(term.c.y < term.top)
 347                 bot = term.top - 1;
 348         if(term.c.y + n >= bot) {
 349                 tclearregion(0, term.c.y, term.col-1, bot);
 350                 return;
 351         }
 352         for(i = term.c.y; i <= bot-n; i++) {
 353                 /* swap deleted line <-> blanked line */
 354                 blank = term.line[i];
 355                 term.line[i] = term.line[i+n];
 356                 term.line[i+n] = blank;
 357                 /* blank it */
 358                 memset(blank, 0, term.col * sizeof(Glyph));
 359         }
 360 }
 361
 362 void
 363 tsetattr(int *attr, int l) {
 364         int i;
 365
 366                 for(i = 0; i < l; i++) {
 367                         switch(attr[i]) {
 368                         case 0:
 369                                 memset(&term.c.attr, 0, sizeof(term.c.attr));
 370                                 term.c.attr.fg = DefaultFG;
 371                                 term.c.attr.bg = DefaultBG;
 372                                 break;
 373                         case 1:
 374                                 term.c.attr.mode |= ATbold;
 375                                 break;
 376                         case 4:
 377                                 term.c.attr.mode |= ATunderline;
 378                                 break;
 379                         case 7:
 380                                 term.c.attr.mode |= ATreverse;
 381                                 break;
 382                         case 8:
 383                                 term.c.hidden = CShide;
 384                                 break;
 385                         case 22:
 386                                 term.c.attr.mode &= ~ATbold;
 387                                 break;
 388                         case 24:
 389                                 term.c.attr.mode &= ~ATunderline;
 390                                 break;
 391                         case 27:
 392                                 term.c.attr.mode &= ~ATreverse;
 393                                 break;
 394                         case 39:
 395                                 term.c.attr.fg = DefaultFG;
 396                                 break;
 397                         case 49:
 398                                 term.c.attr.fg = DefaultBG;
 399                                 break;
 400                         default:
 401                                 if(BETWEEN(attr[i], 30, 37))
 402                                         term.c.attr.fg = attr[i] - 30;
 403                                 else if(BETWEEN(attr[i], 40, 47))
 404                                         term.c.attr.bg = attr[i] - 40;
 405                                 break;
 406                         }
 407                 }
 408 }
 409
 410 void
 411 tsetscroll(int t, int b) {
 412         int temp;
 413
 414         LIMIT(t, 0, term.row-1);
 415         LIMIT(b, 0, term.row-1);
 416         if(t > b) {
 417                 temp = t;
 418                 t = b;
 419                 b = temp;
 420         }
 421         term.top = t;
 422         term.bot = b;
 423 }
 424
 425
 426 void
 427 eschandle(void) {
 428         /* escdump(); */
 429         switch(escseq.pre) {
 430         case '[':
 431                 switch(escseq.mode) {
 432                 case '@': /* Insert <n> blank char */
 433                         DEFAULT(escseq.arg[0], 1);
 434                         tinsertblank(escseq.arg[0]);
 435                         break;
 436                 case 'A': /* Cursor <n> Up */
 437                 case 'e':
 438                         DEFAULT(escseq.arg[0], 1);
 439                         tmoveto(term.c.x, term.c.y-escseq.arg[0]);
 440                         break;
 441                 case 'B': /* Cursor <n> Down */
 442                         DEFAULT(escseq.arg[0], 1);
 443                         tmoveto(term.c.x, term.c.y+escseq.arg[0]);
 444                         break;
 445                 case 'C': /* Cursor <n> Forward */
 446                 case 'a':
 447                         DEFAULT(escseq.arg[0], 1);
 448                         tmoveto(term.c.x+escseq.arg[0], term.c.y);
 449                         break;
 450                 case 'D': /* Cursor <n> Backward */
 451                         DEFAULT(escseq.arg[0], 1);
 452                         tmoveto(term.c.x-escseq.arg[0], term.c.y);
 453                         break;
 454                 case 'E': /* Cursor <n> Down and first col */
 455                         DEFAULT(escseq.arg[0], 1);
 456                         tmoveto(0, term.c.y+escseq.arg[0]);
 457                         break;
 458                 case 'F': /* Cursor <n> Up and first col */
 459                         DEFAULT(escseq.arg[0], 1);
 460                         tmoveto(0, term.c.y-escseq.arg[0]);
 461                         break;
 462                 case 'G': /* Move to <col> */
 463                 case '`':
 464                         DEFAULT(escseq.arg[0], 1);
 465                         tmoveto(escseq.arg[0]-1, term.c.y);
 466                         break;
 467                 case 'H': /* Move to <row> <col> */
 468                 case 'f':
 469                         DEFAULT(escseq.arg[0], 1);
 470                         DEFAULT(escseq.arg[1], 1);
 471                         tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
 472                         break;
 473                 case 'J': /* Clear screen */
 474                         switch(escseq.arg[0]) {
 475                         case 0: /* below */
 476                                 tclearregion(term.c.x, term.c.y, term.col-1, term.row-1);
 477                                 break;
 478                         case 1: /* above */
 479                                 tclearregion(0, 0, term.c.x, term.c.y);
 480                                 break;
 481                         case 2: /* all */
 482                                 tclearregion(0, 0, term.col-1, term.row-1);
 483                                 break;
 484                         }
 485                         break;
 486                 case 'K': /* Clear line */
 487                         switch(escseq.arg[0]) {
 488                         case 0: /* right */
 489                                 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
 490                                 break;
 491                         case 1: /* left */
 492                                 tclearregion(0, term.c.y, term.c.x, term.c.y);
 493                                 break;
 494                         case 2: /* all */
 495                                 tclearregion(0, term.c.y, term.col-1, term.c.y);
 496                                 break;
 497                         }
 498                         break;
 499                 case 'L': /* Insert <n> blank lines */
 500                         DEFAULT(escseq.arg[0], 1);
 501                         tinsertblankline(escseq.arg[0]);
 502                         break;
 503                 case 'l':
 504                         if(escseq.priv && escseq.arg[0] == 25)
 505                                 term.c.hidden = 1;
 506                         break;
 507                 case 'M': /* Delete <n> lines */
 508                         DEFAULT(escseq.arg[0], 1);
 509                         tdeleteline(escseq.arg[0]);
 510                         break;
 511                 case 'P': /* Delete <n> char */
 512                         DEFAULT(escseq.arg[0], 1);
 513                         tdeletechar(escseq.arg[0]);
 514                         break;
 515                 case 'd': /* Move to <row> */
 516                         DEFAULT(escseq.arg[0], 1);
 517                         tmoveto(term.c.x, escseq.arg[0]-1);
 518                         break;
 519                 case 'h': /* Set terminal mode */
 520                         if(escseq.priv && escseq.arg[0] == 25)
 521                                 term.c.hidden = 0;
 522                         break;
 523                 case 'm': /* Terminal attribute (color) */
 524                         tsetattr(escseq.arg, escseq.narg);
 525                         break;
 526                 case 'r':
 527                         if(escseq.priv)
 528                                 ;
 529                         else {
 530                                 DEFAULT(escseq.arg[0], 1);
 531                                 DEFAULT(escseq.arg[1], term.row);
 532                                 tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
 533                         }
 534                         break;
 535                 case 's': /* Save cursor position */
 536                         tcpos(CSsave);
 537                         break;
 538                 case 'u': /* Load cursor position */
 539                         tcpos(CSload);
 540                         break;
 541                 }
 542                 break;
 543         }
 544 }
 545
 546 void
 547 escdump(void) {
 548         int i;
 549         puts("------");
 550         printf("rawbuf  : %s\n", escseq.buf);
 551         printf("prechar : %c\n", escseq.pre);
 552         printf("private : %c\n", escseq.priv ? '?' : ' ');
 553         printf("narg    : %d\n", escseq.narg);
 554         if(escseq.narg) {
 555                 for(i = 0; i < escseq.narg; i++)
 556                         printf("\targ %d = %d\n", i, escseq.arg[i]);
 557         }
 558         printf("mode    : %c\n", escseq.mode);
 559 }
 560
 561 void
 562 escreset(void) {
 563         memset(&escseq, 0, sizeof(escseq));
 564 }
 565
 566 void
 567 tputtab(void) {
 568         int space = TAB - term.c.x % TAB;
 569
 570         if(term.c.x + space >= term.col)
 571                 space--;
 572
 573         for(; space > 0; space--)
 574                 tcursor(CSright);
 575 }
 576
 577 void
 578 tputc(char c) {
 579         static int inesc = 0;
 580 #if 0
 581         dump(c);
 582 #endif
 583         /* start of escseq */
 584         if(c == '\033')
 585                 escreset(), inesc = 1;
 586         else if(inesc) {
 587                 inesc = escaddc(c);
 588         } /* normal char */
 589         else switch(c) {
 590                 default:
 591                         tsetchar(c);
 592                         tcursor(CSright);
 593                         break;
 594                 case '\t':
 595                         tputtab();
 596                         break;
 597                 case '\b':
 598                         tcursor(CSleft);
 599                         break;
 600                 case '\r':
 601                         tmoveto(0, term.c.y);
 602                         break;
 603                 case '\n':
 604                         tnewline();
 605                         break;
 606                 case '\a':
 607                         xbell();
 608                         break;
 609         }
 610 }
 611
 612 void
 613 tputs(char *s, int len) {
 614         for(; len > 0; len--)
 615                 tputc(*s++);
 616 }
 617
 618 void
 619 tdump(void) {
 620         int row, col;
 621         Glyph c;
 622
 623         for(row = 0; row < term.row; row++) {
 624                 for(col = 0; col < term.col; col++) {
 625                         if(col == term.c.x && row == term.c.y)
 626                                 putchar('#');
 627                         else {
 628                                 c = term.line[row][col];
 629                                 putchar(c.state & CRset ? c.c : '.');
 630                         }
 631                 }
 632                 putchar('\n');
 633         }
 634 }
 635
 636 void
 637 tresize(int col, int row) {
 638         int i;
 639         Line *line;
 640         int minrow = MIN(row, term.row);
 641         int mincol = MIN(col, term.col);
 642
 643         if(col < 1 || row < 1)
 644                 return;
 645         /* alloc */
 646         line = calloc(row, sizeof(Line));
 647         for(i = 0 ; i < row; i++)
 648                 line[i] = calloc(col, sizeof(Glyph));
 649         /* copy */
 650         for(i = 0 ; i < minrow; i++)
 651                 memcpy(line[i], term.line[i], mincol * sizeof(Glyph));
 652         /* free */
 653         for(i = 0; i < term.row; i++)
 654                 free(term.line[i]);
 655         free(term.line);
 656
 657         LIMIT(term.c.x, 0, col-1);
 658         LIMIT(term.c.y, 0, row-1);
 659         LIMIT(term.top, 0, row-1);
 660         LIMIT(term.bot, 0, row-1);
 661
 662         term.bot = row-1;
 663         term.line = line;
 664         term.col = col, term.row = row;
 665 }
 666
 667 unsigned long
 668 xgetcol(const char *s) {
 669         XColor color;
 670         Colormap cmap = DefaultColormap(xw.dis, xw.scr);
 671
 672         if(!XAllocNamedColor(xw.dis, cmap, s, &color, &color)) {
 673                 color.pixel = WhitePixel(xw.dis, xw.scr);
 674                 fprintf(stderr, "Could not allocate color '%s'\n", s);
 675         }
 676         return color.pixel;
 677 }
 678
 679
 680 void
 681 xclear(int x1, int y1, int x2, int y2) {
 682         XClearArea(xw.dis, xw.win,
 683                         x1 * xw.cw, y1 * xw.ch,
 684                         (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch,
 685                         False);
 686 }
 687
 688
 689 void
 690 xscroll(void) {
 691         int srcy = (term.top+1) * xw.ch;
 692         int dsty = term.top * xw.ch;
 693         int height = (term.bot-term.top) * xw.ch;
 694
 695         xcursor(CShide);
 696         XCopyArea(xw.dis, xw.win, xw.win, dc.gc, 0, srcy, xw.w, height, 0, dsty);
 697         xclear(0, term.bot, term.col-1, term.bot);
 698 }
 699
 700
 701
 702
 703 void
 704 xinit(void) {
 705         XGCValues values;
 706         unsigned long valuemask;
 707         XClassHint chint;
 708         XWMHints wmhint;
 709         XSizeHints shint;
 710         char *args[] = {NULL};
 711         int i;
 712
 713         xw.dis = XOpenDisplay(NULL);
 714         xw.scr = XDefaultScreen(xw.dis);
 715         if(!xw.dis)
 716                 die("can not open display");
 717
 718         /* font */
 719         if(!(dc.font = XLoadQueryFont(xw.dis, FONT)))
 720                 die("can not find font " FONT);
 721
 722         xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing;
 723         xw.ch = dc.font->ascent + dc.font->descent + LINESPACE;
 724
 725         /* colors */
 726         for(i = 0; i < LEN(colorname); i++)
 727                 dc.col[i] = xgetcol(colorname[i]);
 728
 729         term.c.attr.fg = DefaultFG;
 730         term.c.attr.bg = DefaultBG;
 731         term.c.attr.mode = ATnone;
 732         /* windows */
 733         xw.h = term.row * xw.ch;
 734         xw.w = term.col * xw.cw;
 735         /* XXX: this BORDER is useless after the first resize, handle it in xdraws() */
 736         xw.win = XCreateSimpleWindow(xw.dis, XRootWindow(xw.dis, xw.scr), 0, 0,
 737                         xw.w, xw.h, BORDER,
 738                         dc.col[DefaultBG],
 739                         dc.col[DefaultBG]);
 740         /* gc */
 741         values.foreground = XWhitePixel(xw.dis, xw.scr);
 742         values.font = dc.font->fid;
 743         valuemask = GCForeground | GCFont;
 744         dc.gc = XCreateGC(xw.dis, xw.win, valuemask, &values);
 745         XMapWindow(xw.dis, xw.win);
 746         /* wm stuff */
 747         chint.res_name = TNAME, chint.res_class = TNAME;
 748         wmhint.input = 1, wmhint.flags = InputHint;
 749         shint.height_inc = xw.ch, shint.width_inc = xw.cw;
 750         shint.height = xw.h, shint.width = xw.w;
 751         shint.flags = PSize | PResizeInc;
 752         XSetWMProperties(xw.dis, xw.win, NULL, NULL, &args[0], 0, &shint, &wmhint, &chint);
 753         XStoreName(xw.dis, xw.win, TNAME);
 754         XSync(xw.dis, 0);
 755 }
 756
 757 void
 758 xdrawc(int x, int y, Glyph g) {
 759         XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
 760         unsigned long xfg, xbg;
 761
 762         /* reverse video */
 763         if(g.mode & ATreverse)
 764                 xfg = dc.col[g.bg], xbg = dc.col[g.fg];
 765         else
 766                 xfg = dc.col[g.fg], xbg = dc.col[g.bg];
 767         /* background */
 768         XSetForeground(xw.dis, dc.gc, xbg);
 769         XFillRectangles(xw.dis, xw.win, dc.gc, &r, 1);
 770         /* string */
 771         XSetForeground(xw.dis, dc.gc, xfg);
 772         XDrawString(xw.dis, xw.win, dc.gc, r.x, r.y+dc.font->ascent, &(g.c), 1);
 773         if(g.mode & ATbold)      /* XXX: bold hack (draw again at x+1) */
 774                 XDrawString(xw.dis, xw.win, dc.gc, r.x+1, r.y+dc.font->ascent, &(g.c), 1);
 775         /* underline */
 776         if(g.mode & ATunderline) {
 777                 r.y += dc.font->ascent + 1;
 778                 XDrawLine(xw.dis, xw.win, dc.gc, r.x, r.y, r.x+r.width-1, r.y);
 779         }
 780 }
 781
 782 void
 783 xcursor(int mode) {
 784         static int oldx = 0;
 785         static int oldy = 0;
 786         Glyph g = {' ', ATnone, DefaultBG, DefaultCS, 0};
 787
 788         LIMIT(oldx, 0, term.col-1);
 789         LIMIT(oldy, 0, term.row-1);
 790
 791         if(term.line[term.c.y][term.c.x].state & CRset)
 792                 g.c = term.line[term.c.y][term.c.x].c;
 793         /* remove the old cursor */
 794         if(term.line[oldy][oldx].state & CRset)
 795                 xdrawc(oldx, oldy, term.line[oldy][oldx]);
 796         else xclear(oldx, oldy, oldx, oldy); /* XXX: maybe a bug */
 797         if(mode == CSdraw && !term.c.hidden) {
 798                 xdrawc(term.c.x, term.c.y, g);
 799                 oldx = term.c.x, oldy = term.c.y;
 800         }
 801 }
 802
 803
 804 void
 805 draw(int redraw_all) {
 806         int x, y;
 807         int changed, set;
 808
 809         if(redraw_all)
 810                 XClearWindow(xw.dis, xw.win);
 811         /* XXX: drawing could be optimised */
 812         for(y = 0; y < term.row; y++) {
 813                 for(x = 0; x < term.col; x++) {
 814                         changed = term.line[y][x].state & CRupdate;
 815                         set = term.line[y][x].state & CRset;
 816                         if((changed && set) || (redraw_all && set)) {
 817                                 term.line[y][x].state &= ~CRupdate;
 818                                 xdrawc(x, y, term.line[y][x]);
 819                         }
 820                 }
 821         }
 822         xcursor(CSdraw);
 823 }
 824
 825 void
 826 kpress(XKeyEvent *e) {
 827         KeySym ksym;
 828         char buf[32];
 829         int len;
 830         int meta;
 831         int shift;
 832
 833         meta  = e->state & Mod1Mask;
 834         shift = e->state & ShiftMask;
 835         len = XLookupString(e, buf, sizeof(buf), &ksym, NULL);
 836         if(len > 0) {
 837                 buf[sizeof(buf)-1] = '\0';
 838                 if(meta && len == 1)
 839                         ttywrite("\033", 1);
 840                 ttywrite(buf, len);
 841                 return;
 842         }
 843         switch(ksym) {
 844         default:
 845                 fprintf(stderr, "errkey: %d\n", (int)ksym);
 846                 break;
 847         case XK_Up:
 848         case XK_Down:
 849         case XK_Left:
 850         case XK_Right:
 851                 sprintf(buf, "\033[%c", "DACB"[ksym - XK_Left]);
 852                 ttywrite(buf, 3);
 853                 break;
 854         case XK_Delete: ttywrite(KEYDELETE, sizeof(KEYDELETE)-1); break;
 855         case XK_Home:  ttywrite(KEYHOME, sizeof(KEYHOME)-1); break;
 856         case XK_End:   ttywrite(KEYEND,  sizeof(KEYEND) -1); break;
 857         case XK_Prior: ttywrite(KEYPREV, sizeof(KEYPREV)-1); break;
 858         case XK_Next:  ttywrite(KEYNEXT, sizeof(KEYNEXT)-1); break;
 859         case XK_Insert:
 860                 /* XXX: paste X clipboard */
 861                 if(shift)
 862                         ;
 863                 break;
 864         }
 865 }
 866
 867 void
 868 resize(XEvent *e) {
 869         int col, row;
 870         col = e->xconfigure.width / xw.cw;
 871         row = e->xconfigure.height / xw.ch;
 872
 873         if(term.col != col || term.row != row) {
 874                 tresize(col, row);
 875                 ttyresize(col, row);
 876                 xw.w = e->xconfigure.width;
 877                 xw.h = e->xconfigure.height;
 878                 draw(SCredraw);
 879         }
 880 }
 881
 882
 883 void
 884 run(void) {
 885         int ret;
 886         XEvent ev;
 887         fd_set rfd;
 888         int xfd = XConnectionNumber(xw.dis);
 889
 890         running = 1;
 891         XSelectInput(xw.dis, xw.win, ExposureMask | KeyPressMask | StructureNotifyMask);
 892         XResizeWindow(xw.dis, xw.win, xw.w , xw.h); /* seems to fix the resize bug in wmii */
 893
 894         while(running) {
 895                 FD_ZERO(&rfd);
 896                 FD_SET(cmdfd, &rfd);
 897                 FD_SET(xfd, &rfd);
 898                 XFlush(xw.dis);
 899                 ret = select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL);
 900
 901                 if(ret < 0) {
 902                         fprintf(stderr, "select: %m\n");
 903                         running = 0;
 904                 }
 905
 906                 if(FD_ISSET(xfd, &rfd)) {
 907                         while(XPending(xw.dis)) {
 908                                 XNextEvent(xw.dis, &ev);
 909                                 switch (ev.type) {
 910                                 default:
 911                                         break;
 912                                 case KeyPress:
 913                                         kpress(&ev.xkey);
 914                                         break;
 915                                 case Expose:
 916                                         draw(SCredraw);
 917                                         break;
 918                                 case ConfigureNotify:
 919                                         resize(&ev);
 920                                         break;
 921                                 }
 922                         }
 923                 }
 924                 if(FD_ISSET(cmdfd, &rfd)) {
 925                         ttyread();
 926                         draw(SCupdate);
 927                 }
 928         }
 929 }
 930
 931 int
 932 main(int argc, char *argv[]) {
 933         if(argc == 2 && !strncmp("-v", argv[1], 3))
 934                 die("st-" VERSION ", © 2009 st engineers\n");
 935         else if(argc != 1)
 936                 die("usage: st [-v]\n");
 937         setlocale(LC_CTYPE, "");
 938         tnew(80, 24);
 939         ttynew();
 940         xinit();
 941         run();
 942         return 0;
 943 }