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                 /* XXX: graphic character set */
 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 xf = term.c.x, yf = term.c.y;
 234
 235         switch(dir) {
 236         case CSup:
 237                 yf--;
 238                 break;
 239         case CSdown:
 240                 yf++;
 241                 break;
 242         case CSleft:
 243                 xf--;
 244                 if(xf < 0) {
 245                         xf = term.col-1, yf--;
 246                         if(yf < term.top)
 247                                 yf = term.top, xf = 0;
 248                 }
 249                 break;
 250         case CSright:
 251                 xf++;
 252                 if(xf >= term.col) {
 253                         xf = 0, yf++;
 254                         if(yf > term.bot)
 255                                 yf = term.bot, tscroll();
 256                 }
 257                 break;
 258         }
 259         tmoveto(xf, yf);
 260 }
 261
 262 void
 263 tsetchar(char c) {
 264         term.line[term.c.y][term.c.x] = term.c.attr;
 265         term.line[term.c.y][term.c.x].c = c;
 266         term.line[term.c.y][term.c.x].state |= CRset | CRupdate;
 267 }
 268
 269 void
 270 tclearregion(int x1, int y1, int x2, int y2) {
 271         int x, y;
 272
 273         LIMIT(x1, 0, term.col-1);
 274         LIMIT(x2, 0, term.col-1);
 275         LIMIT(y1, 0, term.row-1);
 276         LIMIT(y2, 0, term.row-1);
 277
 278         /* XXX: could be optimized */
 279         for(x = x1; x <= x2; x++)
 280                 for(y = y1; y <= y2; y++)
 281                         memset(&term.line[y][x], 0, sizeof(Glyph));
 282
 283         xclear(x1, y1, x2, y2);
 284 }
 285
 286 void
 287 tdeletechar(int n) {
 288         int src = term.c.x + n;
 289         int dst = term.c.x;
 290         int size = term.col - src;
 291
 292         if(src >= term.col) {
 293                 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
 294                 return;
 295         }
 296         memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
 297         tclearregion(term.col-size, term.c.y, term.col-1, term.c.y);
 298 }
 299
 300 void
 301 tinsertblank(int n) {
 302         int src = term.c.x;
 303         int dst = src + n;
 304         int size = term.col - n - src;
 305
 306         if(dst >= term.col) {
 307                 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
 308                 return;
 309         }
 310         memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
 311         tclearregion(src, term.c.y, dst, term.c.y);
 312 }
 313
 314 void
 315 tinsertblankline (int n) {
 316         int i;
 317         Line blank;
 318         int bot = term.bot;
 319
 320         if(term.c.y > term.bot)
 321                 bot = term.row - 1;
 322         else if(term.c.y < term.top)
 323                 bot = term.top - 1;
 324         if(term.c.y + n >= bot) {
 325                 tclearregion(0, term.c.y, term.col-1, bot);
 326                 return;
 327         }
 328         for(i = bot; i >= term.c.y+n; i--) {
 329                 /* swap deleted line <-> blanked line */
 330                 blank = term.line[i];
 331                 term.line[i] = term.line[i-n];
 332                 term.line[i-n] = blank;
 333                 /* blank it */
 334                 memset(blank, 0, term.col * sizeof(Glyph));
 335         }
 336 }
 337
 338
 339 void
 340 tdeleteline(int n) {
 341         int i;
 342         Line blank;
 343         int bot = term.bot;
 344
 345         if(term.c.y > term.bot)
 346                 bot = term.row - 1;
 347         else if(term.c.y < term.top)
 348                 bot = term.top - 1;
 349         if(term.c.y + n >= bot) {
 350                 tclearregion(0, term.c.y, term.col-1, bot);
 351                 return;
 352         }
 353         for(i = term.c.y; i <= bot-n; i++) {
 354                 /* swap deleted line <-> blanked line */
 355                 blank = term.line[i];
 356                 term.line[i] = term.line[i+n];
 357                 term.line[i+n] = blank;
 358                 /* blank it */
 359                 memset(blank, 0, term.col * sizeof(Glyph));
 360         }
 361 }
 362
 363 void
 364 tsetattr(int *attr, int l) {
 365         int i;
 366
 367 #ifdef TRUECOLOR /* ESC [ ? <fg/bg> ; <r> ; <g> ; <b> m */
 368         Color col;
 369         if(escseq.priv && escseq.len == 4) { /* True color extension :) */
 370                 col = (escseq.arg[1]<<16) + (escseq.arg[2]<<8) + escseq.arg[3];
 371                 switch(escseq.arg[0]) {
 372                 case 3: /* foreground */
 373                         term.c.attr.fg = col;
 374                         break;
 375                 case 4: /* background */
 376                         term.c.attr.bg = col;
 377                         break;
 378                 }
 379         }
 380         else
 381 #endif
 382                 for(i = 0; i < l; i++) {
 383                         switch(attr[i]) {
 384                         case 0:
 385                                 memset(&term.c.attr, 0, sizeof(term.c.attr));
 386                                 term.c.attr.fg = DefaultFG;
 387                                 term.c.attr.bg = DefaultBG;
 388                                 break;
 389                         case 1:
 390                                 term.c.attr.mode |= ATbold;
 391                                 break;
 392                         case 4:
 393                                 term.c.attr.mode |= ATunderline;
 394                                 break;
 395                         case 7:
 396                                 term.c.attr.mode |= ATreverse;
 397                                 break;
 398                         case 8:
 399                                 term.c.hidden = CShide;
 400                                 break;
 401                         case 22:
 402                                 term.c.attr.mode &= ~ATbold;
 403                                 break;
 404                         case 24:
 405                                 term.c.attr.mode &= ~ATunderline;
 406                                 break;
 407                         case 27:
 408                                 term.c.attr.mode &= ~ATreverse;
 409                                 break;
 410                         case 39:
 411                                 term.c.attr.fg = DefaultFG;
 412                                 break;
 413                         case 49:
 414                                 term.c.attr.fg = DefaultBG;
 415                                 break;
 416                         default:
 417                                 if(BETWEEN(attr[i], 30, 37))
 418                                         term.c.attr.fg = attr[i] - 30;
 419                                 else if(BETWEEN(attr[i], 40, 47))
 420                                         term.c.attr.bg = attr[i] - 40;
 421                                 break;
 422                         }
 423                 }
 424 }
 425
 426 void
 427 tsetscroll(int t, int b) {
 428         int temp;
 429
 430         LIMIT(t, 0, term.row-1);
 431         LIMIT(b, 0, term.row-1);
 432         if(t > b) {
 433                 temp = t;
 434                 t = b;
 435                 b = temp;
 436         }
 437         term.top = t;
 438         term.bot = b;
 439 }
 440
 441
 442 void
 443 eschandle(void) {
 444         /* escdump(); */
 445         switch(escseq.pre) {
 446         case '[':
 447                 switch(escseq.mode) {
 448                 case '@': /* Insert <n> blank char */
 449                         DEFAULT(escseq.arg[0], 1);
 450                         tinsertblank(escseq.arg[0]);
 451                         break;
 452                 case 'A': /* Cursor <n> Up */
 453                 case 'e':
 454                         DEFAULT(escseq.arg[0], 1);
 455                         tmoveto(term.c.x, term.c.y-escseq.arg[0]);
 456                         break;
 457                 case 'B': /* Cursor <n> Down */
 458                         DEFAULT(escseq.arg[0], 1);
 459                         tmoveto(term.c.x, term.c.y+escseq.arg[0]);
 460                         break;
 461                 case 'C': /* Cursor <n> Forward */
 462                 case 'a':
 463                         DEFAULT(escseq.arg[0], 1);
 464                         tmoveto(term.c.x+escseq.arg[0], term.c.y);
 465                         break;
 466                 case 'D': /* Cursor <n> Backward */
 467                         DEFAULT(escseq.arg[0], 1);
 468                         tmoveto(term.c.x-escseq.arg[0], term.c.y);
 469                         break;
 470                 case 'E': /* Cursor <n> Down and first col */
 471                         DEFAULT(escseq.arg[0], 1);
 472                         tmoveto(0, term.c.y+escseq.arg[0]);
 473                         break;
 474                 case 'F': /* Cursor <n> Up and first col */
 475                         DEFAULT(escseq.arg[0], 1);
 476                         tmoveto(0, term.c.y-escseq.arg[0]);
 477                         break;
 478                 case 'G': /* Move to <col> */
 479                 case '`':
 480                         DEFAULT(escseq.arg[0], 1);
 481                         tmoveto(escseq.arg[0]-1, term.c.y);
 482                         break;
 483                 case 'H': /* Move to <row> <col> */
 484                 case 'f':
 485                         DEFAULT(escseq.arg[0], 1);
 486                         DEFAULT(escseq.arg[1], 1);
 487                         tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
 488                         break;
 489                 case 'J': /* Clear screen */
 490                         switch(escseq.arg[0]) {
 491                         case 0: /* below */
 492                                 tclearregion(term.c.x, term.c.y, term.col-1, term.row-1);
 493                                 break;
 494                         case 1: /* above */
 495                                 tclearregion(0, 0, term.c.x, term.c.y);
 496                                 break;
 497                         case 2: /* all */
 498                                 tclearregion(0, 0, term.col-1, term.row-1);
 499                                 break;
 500                         }
 501                         break;
 502                 case 'K': /* Clear line */
 503                         switch(escseq.arg[0]) {
 504                         case 0: /* right */
 505                                 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
 506                                 break;
 507                         case 1: /* left */
 508                                 tclearregion(0, term.c.y, term.c.x, term.c.y);
 509                                 break;
 510                         case 2: /* all */
 511                                 tclearregion(0, term.c.y, term.col-1, term.c.y);
 512                                 break;
 513                         }
 514                         break;
 515                 case 'L': /* Insert <n> blank lines */
 516                         DEFAULT(escseq.arg[0], 1);
 517                         tinsertblankline(escseq.arg[0]);
 518                         break;
 519                 case 'M': /* Delete <n> lines */
 520                         DEFAULT(escseq.arg[0], 1);
 521                         tdeleteline(escseq.arg[0]);
 522                         break;
 523                 case 'P': /* Delete <n> char */
 524                         DEFAULT(escseq.arg[0], 1);
 525                         tdeletechar(escseq.arg[0]);
 526                         break;
 527                 case 'd': /* Move to <row> */
 528                         DEFAULT(escseq.arg[0], 1);
 529                         tmoveto(term.c.x, escseq.arg[0]-1);
 530                         break;
 531                 case 'h': /* Set terminal mode */
 532                         break;
 533                 case 'm': /* Terminal attribute (color) */
 534                         tsetattr(escseq.arg, escseq.narg);
 535                         break;
 536                 case 'r':
 537                         if(escseq.priv)
 538                                 ;
 539                         else {
 540                                 DEFAULT(escseq.arg[0], 1);
 541                                 DEFAULT(escseq.arg[1], term.row);
 542                                 tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
 543                         }
 544                         break;
 545                 case 's': /* Save cursor position */
 546                         tcpos(CSsave);
 547                         break;
 548                 case 'u': /* Load cursor position */
 549                         tcpos(CSload);
 550                         break;
 551                 }
 552                 break;
 553         }
 554 }
 555
 556 void
 557 escdump(void) {
 558         int i;
 559         puts("------");
 560         printf("rawbuf  : %s\n", escseq.buf);
 561         printf("prechar : %c\n", escseq.pre);
 562         printf("private : %c\n", escseq.priv ? '?' : ' ');
 563         printf("narg    : %d\n", escseq.narg);
 564         if(escseq.narg) {
 565                 for(i = 0; i < escseq.narg; i++)
 566                         printf("\targ %d = %d\n", i, escseq.arg[i]);
 567         }
 568         printf("mode    : %c\n", escseq.mode);
 569 }
 570
 571 void
 572 escreset(void) {
 573         memset(&escseq, 0, sizeof(escseq));
 574 }
 575
 576 void
 577 tputc(char c) {
 578         static int inesc = 0;
 579
 580         dump(c);
 581         /* start of escseq */
 582         if(c == '\033')
 583                 escreset(), inesc = 1;
 584         else if(inesc) {
 585                 inesc = escaddc(c);
 586         } /* normal char */
 587         else switch(c) {
 588                 default:
 589                         tsetchar(c);
 590                         tcursor(CSright);
 591                         break;
 592                 case '\b':
 593                         tcursor(CSleft);
 594                         break;
 595                 case '\r':
 596                         tmoveto(0, term.c.y);
 597                         break;
 598                 case '\n':
 599                         tnewline();
 600                         break;
 601                 case '\a':
 602                         xbell();
 603                         break;
 604         }
 605 }
 606
 607 void
 608 tputs(char *s, int len) {
 609         for(; len > 0; len--)
 610                 tputc(*s++);
 611 }
 612
 613 void
 614 tdump(void) {
 615         int row, col;
 616         Glyph c;
 617
 618         for(row = 0; row < term.row; row++) {
 619                 for(col = 0; col < term.col; col++) {
 620                         if(col == term.c.x && row == term.c.y)
 621                                 putchar('#');
 622                         else {
 623                                 c = term.line[row][col];
 624                                 putchar(c.state & CRset ? c.c : '.');
 625                         }
 626                 }
 627                 putchar('\n');
 628         }
 629 }
 630
 631 void
 632 tresize(int col, int row) {
 633         int i;
 634         Line *line;
 635         int minrow = MIN(row, term.row);
 636         int mincol = MIN(col, term.col);
 637
 638         if(col < 1 || row < 1)
 639                 return;
 640         line = calloc(row, sizeof(Line));
 641         for(i = 0 ; i < row; i++)
 642                 line[i] = calloc(col, sizeof(Glyph));
 643         for(i = 0 ; i < minrow; i++) {
 644                 memcpy(line[i], term.line[i], mincol * sizeof(Glyph));
 645                 free(term.line[i]);
 646         }
 647         free(term.line);
 648         LIMIT(term.c.x, 0, col-1);
 649         LIMIT(term.c.y, 0, row-1);
 650         LIMIT(term.top, 0, row-1);
 651         LIMIT(term.bot, 0, row-1);
 652         //    if(term.bot == term.row-1)
 653         term.bot = row-1;
 654         term.line = line;
 655         term.col = col, term.row = row;
 656 }
 657
 658 unsigned long
 659 xgetcol(const char *s) {
 660         XColor color;
 661         Colormap cmap = DefaultColormap(xw.dis, xw.scr);
 662
 663         if(!XAllocNamedColor(xw.dis, cmap, s, &color, &color)) {
 664                 color.pixel = WhitePixel(xw.dis, xw.scr);
 665                 fprintf(stderr, "Could not allocate color '%s'\n", s);
 666         }
 667         return color.pixel;
 668 }
 669
 670
 671 void
 672 xclear(int x1, int y1, int x2, int y2) {
 673         XClearArea(xw.dis, xw.win,
 674                         x1 * xw.cw, y1 * xw.ch,
 675                         (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch,
 676                         False);
 677 }
 678
 679
 680 void
 681 xscroll(void) {
 682         int srcy = (term.top+1) * xw.ch;
 683         int dsty = term.top * xw.ch;
 684         int height = (term.bot-term.top) * xw.ch;
 685
 686         xcursor(CShide);
 687         XCopyArea(xw.dis, xw.win, xw.win, dc.gc, 0, srcy, xw.w, height, 0, dsty);
 688         xclear(0, term.bot, term.col-1, term.bot);
 689 }
 690
 691
 692
 693
 694 void
 695 xinit(void) {
 696         XGCValues values;
 697         unsigned long valuemask;
 698         XClassHint chint;
 699         XWMHints wmhint;
 700         XSizeHints shint;
 701         char *args[] = {NULL};
 702         int i;
 703
 704         xw.dis = XOpenDisplay(NULL);
 705         xw.scr = XDefaultScreen(xw.dis);
 706         /* font */
 707         dc.font = XLoadQueryFont(xw.dis, FONT);
 708         xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing;
 709         xw.ch = dc.font->ascent + dc.font->descent + LINESPACE;
 710         /* colors */
 711         for(i = 0; i < LEN(colorname); i++)
 712                 dc.col[i] = xgetcol(colorname[i]);
 713         term.c.attr.fg = DefaultFG;
 714         term.c.attr.bg = DefaultBG;
 715         term.c.attr.mode = ATnone;
 716         /* windows */
 717         xw.h = term.row * xw.ch;
 718         xw.w = term.col * xw.cw;
 719         /* XXX: this BORDER is useless after the first resize, handle it in xdraws() */
 720         xw.win = XCreateSimpleWindow(xw.dis, XRootWindow(xw.dis, xw.scr), 0, 0,
 721                         xw.w, xw.h, BORDER,
 722                         dc.col[DefaultBG],
 723                         dc.col[DefaultBG]);
 724         /* gc */
 725         values.foreground = XWhitePixel(xw.dis, xw.scr);
 726         values.font = dc.font->fid;
 727         valuemask = GCForeground | GCFont;
 728         dc.gc = XCreateGC(xw.dis, xw.win, valuemask, &values);
 729         XMapWindow(xw.dis, xw.win);
 730         /* wm stuff */
 731         chint.res_name = TNAME, chint.res_class = TNAME;
 732         wmhint.input = 1, wmhint.flags = InputHint;
 733         shint.height_inc = xw.ch, shint.width_inc = xw.cw;
 734         shint.height = xw.h, shint.width = xw.w;
 735         shint.flags = PSize | PResizeInc;
 736         XSetWMProperties(xw.dis, xw.win, NULL, NULL, &args[0], 0, &shint, &wmhint, &chint);
 737         XStoreName(xw.dis, xw.win, TNAME);
 738         XSync(xw.dis, 0);
 739 }
 740
 741 void
 742 xdrawc(int x, int y, Glyph g) {
 743         XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
 744         unsigned long xfg, xbg;
 745
 746         /* reverse video */
 747         if(g.mode & ATreverse)
 748                 xfg = dc.col[g.bg], xbg = dc.col[g.fg];
 749         else
 750                 xfg = dc.col[g.fg], xbg = dc.col[g.bg];
 751         /* background */
 752         XSetForeground(xw.dis, dc.gc, xbg);
 753         XFillRectangles(xw.dis, xw.win, dc.gc, &r, 1);
 754         /* string */
 755         XSetForeground(xw.dis, dc.gc, xfg);
 756         XDrawString(xw.dis, xw.win, dc.gc, r.x, r.y+dc.font->ascent, &(g.c), 1);
 757         if(g.mode & ATbold)  /* XXX: bold hack (draw again at x+1) */
 758                 XDrawString(xw.dis, xw.win, dc.gc, r.x+1, r.y+dc.font->ascent, &(g.c), 1);
 759         /* underline */
 760         if(g.mode & ATunderline) {
 761                 r.y += dc.font->ascent + 1;
 762                 XDrawLine(xw.dis, xw.win, dc.gc, r.x, r.y, r.x+r.width-1, r.y);
 763         }
 764 }
 765
 766 void
 767 xcursor(int mode) {
 768         static int oldx = 0;
 769         static int oldy = 0;
 770         Glyph g = {' ', ATnone, DefaultBG, DefaultCS, 0};
 771
 772         if(term.line[term.c.y][term.c.x].state & CRset)
 773                 g.c = term.line[term.c.y][term.c.x].c;
 774         /* remove the old cursor */
 775         if(term.line[oldy][oldx].state & CRset)
 776                 xdrawc(oldx, oldy, term.line[oldy][oldx]);
 777         else xclear(oldx, oldy, oldx, oldy); /* XXX: maybe a bug */
 778         if(mode == CSdraw && !term.c.hidden) {
 779                 xdrawc(term.c.x, term.c.y, g);
 780                 oldx = term.c.x, oldy = term.c.y;
 781         }
 782 }
 783
 784
 785 void
 786 draw(int redraw_all) {
 787         int x, y;
 788         int changed, set;
 789
 790         if(redraw_all)
 791                 XClearWindow(xw.dis, xw.win);
 792         /* XXX: drawing could be optimised */
 793         for(y = 0; y < term.row; y++) {
 794                 for(x = 0; x < term.col; x++) {
 795                         changed = term.line[y][x].state & CRupdate;
 796                         set = term.line[y][x].state & CRset;
 797                         if((changed && set) || (redraw_all && set)) {
 798                                 term.line[y][x].state &= ~CRupdate;
 799                                 xdrawc(x, y, term.line[y][x]);
 800                         }
 801                 }
 802         }
 803         xcursor(CSdraw);
 804 }
 805
 806 void
 807 kpress(XKeyEvent *e) {
 808         KeySym ksym;
 809         char buf[32];
 810         int len;
 811         int meta;
 812         int shift;
 813
 814         meta  = e->state & Mod4Mask;
 815         shift = e->state & ShiftMask;
 816         len = XLookupString(e, buf, sizeof(buf), &ksym, NULL);
 817         if(len > 0) {
 818                 buf[sizeof(buf)-1] = '\0';
 819                 if(meta && len == 1)
 820                         ttywrite("\033", 1);
 821                 ttywrite(buf, len);
 822                 return;
 823         }
 824         switch(ksym) {
 825 #ifdef DEBUG1
 826         default:
 827                 printf("errkey: %d\n", (int)ksym);
 828                 break;
 829 #endif
 830         case XK_Up:
 831         case XK_Down:
 832         case XK_Left:
 833         case XK_Right:
 834                 sprintf(buf, "\033[%c", "DACB"[ksym - XK_Left]);
 835                 ttywrite(buf, 3);
 836                 break;
 837         case XK_Delete: ttywrite(KEYDELETE, sizeof(KEYDELETE)-1); break;
 838         case XK_Home:   ttywrite(  KEYHOME, sizeof(  KEYHOME)-1); break;
 839         case XK_End:    ttywrite(   KEYEND, sizeof(   KEYEND)-1); break;
 840         case XK_Prior:  ttywrite(  KEYPREV, sizeof(  KEYPREV)-1); break;
 841         case XK_Next:   ttywrite(  KEYNEXT, sizeof(  KEYNEXT)-1); break;
 842         case XK_Insert:
 843                 /* XXX: paste X clipboard */
 844                 if(shift);
 845                 break;
 846         }
 847 }
 848
 849 void
 850 resize(XEvent *e) {
 851         int col, row;
 852         col = e->xconfigure.width / xw.cw;
 853         row = e->xconfigure.height / xw.ch;
 854
 855         if(term.col != col && term.row != row) {
 856                 tresize(col, row);
 857                 ttyresize(col, row);
 858                 xw.w = e->xconfigure.width;
 859                 xw.h = e->xconfigure.height;
 860                 draw(SCredraw);
 861         }
 862 }
 863
 864
 865 void
 866 run(void) {
 867         int ret;
 868         XEvent ev;
 869         fd_set rfd;
 870         struct timeval tv = {0, 10000};
 871
 872         running = 1;
 873         XSelectInput(xw.dis, xw.win, ExposureMask | KeyPressMask | StructureNotifyMask);
 874         XResizeWindow(xw.dis, xw.win, xw.w , xw.h); /* seems to fix the resize bug in wmii */
 875         while(running) {
 876                 while(XPending(xw.dis)) {
 877                         XNextEvent(xw.dis, &ev);
 878                         switch (ev.type) {
 879                         default:
 880                                 break;
 881                         case KeyPress:
 882                                 kpress(&ev.xkey);
 883                                 break;
 884                         case Expose:
 885                                 draw(SCredraw);
 886                                 break;
 887                         case ConfigureNotify:
 888                                 resize(&ev);
 889                                 break;
 890                         }
 891                 }
 892                 FD_ZERO(&rfd);
 893                 FD_SET(cmdfd, &rfd);
 894                 ret = select(cmdfd+1, &rfd, NULL, NULL, &tv);
 895                 if(ret < 0) {
 896                         fprintf(stderr, "select: %m\n");
 897                         running = 0;
 898                 }
 899                 if(!ret)
 900                         continue;
 901                 if(FD_ISSET(cmdfd, &rfd)) {
 902                         ttyread();
 903                         draw(SCupdate);
 904                 }
 905         }
 906 }
 907
 908 int
 909 main(int argc, char *argv[]) {
 910         if(argc == 2 && !strncmp("-v", argv[1], 3))
 911                 die("st-"VERSION", © 2009 st engineers\n");
 912         else if(argc != 1)
 913                 die("usage: st [-v]\n");
 914         setlocale(LC_CTYPE, "");
 915         tnew(80, 24);
 916         ttynew();
 917         xinit();
 918         run();
 919         return 0;
 920 }