st.c

   1 /* See LICENSE for licence details. */
   2 #define _XOPEN_SOURCE 600
   3 #include <ctype.h>
   4 #include <errno.h>
   5 #include <fcntl.h>
   6 #include <limits.h>
   7 #include <locale.h>
   8 #include <stdarg.h>
   9 #include <stdbool.h>
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <string.h>
  13 #include <signal.h>
  14 #include <sys/ioctl.h>
  15 #include <sys/select.h>
  16 #include <sys/stat.h>
  17 #include <sys/time.h>
  18 #include <sys/types.h>
  19 #include <sys/wait.h>
  20 #include <time.h>
  21 #include <unistd.h>
  22 #include <X11/Xatom.h>
  23 #include <X11/Xlib.h>
  24 #include <X11/Xutil.h>
  25 #include <X11/cursorfont.h>
  26 #include <X11/keysym.h>
  27 #include <X11/extensions/Xdbe.h>
  28 #include <X11/Xft/Xft.h>
  29 #include <fontconfig/fontconfig.h>
  30 #define Glyph Glyph_
  31 #define Font Font_
  32
  33 #if   defined(__linux)
  34  #include <pty.h>
  35 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
  36  #include <util.h>
  37 #elif defined(__FreeBSD__) || defined(__DragonFly__)
  38  #include <libutil.h>
  39 #endif
  40
  41 #define USAGE \
  42         "st " VERSION " (c) 2010-2012 st engineers\n" \
  43         "usage: st [-v] [-c class] [-f font] [-g geometry] [-o file]" \
  44         " [-t title] [-w windowid] [-e command ...]\n"
  45
  46 /* XEMBED messages */
  47 #define XEMBED_FOCUS_IN  4
  48 #define XEMBED_FOCUS_OUT 5
  49
  50 /* Arbitrary sizes */
  51 #define ESC_BUF_SIZ   256
  52 #define ESC_ARG_SIZ   16
  53 #define STR_BUF_SIZ   256
  54 #define STR_ARG_SIZ   16
  55 #define DRAW_BUF_SIZ  20*1024
  56 #define UTF_SIZ       4
  57 #define XK_NO_MOD     UINT_MAX
  58 #define XK_ANY_MOD    0
  59
  60 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
  61
  62 #define SERRNO strerror(errno)
  63 #define MIN(a, b)  ((a) < (b) ? (a) : (b))
  64 #define MAX(a, b)  ((a) < (b) ? (b) : (a))
  65 #define LEN(a)     (sizeof(a) / sizeof(a[0]))
  66 #define DEFAULT(a, b)     (a) = (a) ? (a) : (b)
  67 #define BETWEEN(x, a, b)  ((a) <= (x) && (x) <= (b))
  68 #define LIMIT(x, a, b)    (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
  69 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
  70 #define IS_SET(flag) (term.mode & (flag))
  71 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
  72 #define X2COL(x) (((x) - BORDER)/xw.cw)
  73 #define Y2ROW(y) (((y) - BORDER)/xw.ch)
  74
  75 enum glyph_attribute {
  76         ATTR_NULL      = 0,
  77         ATTR_REVERSE   = 1,
  78         ATTR_UNDERLINE = 2,
  79         ATTR_BOLD      = 4,
  80         ATTR_GFX       = 8,
  81         ATTR_ITALIC    = 16,
  82         ATTR_BLINK     = 32,
  83 };
  84
  85 enum cursor_movement {
  86         CURSOR_UP,
  87         CURSOR_DOWN,
  88         CURSOR_LEFT,
  89         CURSOR_RIGHT,
  90         CURSOR_SAVE,
  91         CURSOR_LOAD
  92 };
  93
  94 enum cursor_state {
  95         CURSOR_DEFAULT  = 0,
  96         CURSOR_HIDE     = 1,
  97         CURSOR_WRAPNEXT = 2
  98 };
  99
 100 enum glyph_state {
 101         GLYPH_SET   = 1,
 102         GLYPH_DIRTY = 2
 103 };
 104
 105 enum term_mode {
 106         MODE_WRAP       = 1,
 107         MODE_INSERT      = 2,
 108         MODE_APPKEYPAD   = 4,
 109         MODE_ALTSCREEN   = 8,
 110         MODE_CRLF       = 16,
 111         MODE_MOUSEBTN    = 32,
 112         MODE_MOUSEMOTION = 64,
 113         MODE_MOUSE       = 32|64,
 114         MODE_REVERSE     = 128,
 115         MODE_KBDLOCK     = 256
 116 };
 117
 118 enum escape_state {
 119         ESC_START      = 1,
 120         ESC_CSI = 2,
 121         ESC_STR = 4, /* DSC, OSC, PM, APC */
 122         ESC_ALTCHARSET = 8,
 123         ESC_STR_END    = 16, /* a final string was encountered */
 124 };
 125
 126 enum window_state {
 127         WIN_VISIBLE = 1,
 128         WIN_REDRAW  = 2,
 129         WIN_FOCUSED = 4
 130 };
 131
 132 /* bit macro */
 133 #undef B0
 134 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
 135
 136 typedef unsigned char uchar;
 137 typedef unsigned int uint;
 138 typedef unsigned long ulong;
 139 typedef unsigned short ushort;
 140
 141 typedef struct {
 142         char c[UTF_SIZ];     /* character code */
 143         uchar mode;  /* attribute flags */
 144         ushort fg;   /* foreground  */
 145         ushort bg;   /* background  */
 146         uchar state; /* state flags    */
 147 } Glyph;
 148
 149 typedef Glyph* Line;
 150
 151 typedef struct {
 152         Glyph attr;      /* current char attributes */
 153         int x;
 154         int y;
 155         char state;
 156 } TCursor;
 157
 158 /* CSI Escape sequence structs */
 159 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
 160 typedef struct {
 161         char buf[ESC_BUF_SIZ]; /* raw string */
 162         int len;               /* raw string length */
 163         char priv;
 164         int arg[ESC_ARG_SIZ];
 165         int narg;             /* nb of args */
 166         char mode;
 167 } CSIEscape;
 168
 169 /* STR Escape sequence structs */
 170 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
 171 typedef struct {
 172         char type;           /* ESC type ... */
 173         char buf[STR_BUF_SIZ]; /* raw string */
 174         int len;               /* raw string length */
 175         char *args[STR_ARG_SIZ];
 176         int narg;             /* nb of args */
 177 } STREscape;
 178
 179 /* Internal representation of the screen */
 180 typedef struct {
 181         int row;        /* nb row */
 182         int col;        /* nb col */
 183         Line *line;     /* screen */
 184         Line *alt;      /* alternate screen */
 185         bool *dirty;    /* dirtyness of lines */
 186         TCursor c;      /* cursor */
 187         int top;        /* top    scroll limit */
 188         int bot;        /* bottom scroll limit */
 189         int mode;       /* terminal mode flags */
 190         int esc;        /* escape state flags */
 191         bool *tabs;
 192 } Term;
 193
 194 /* Purely graphic info */
 195 typedef struct {
 196         Display* dpy;
 197         Colormap cmap;
 198         Window win;
 199         XdbeBackBuffer buf;
 200         Atom xembed, wmdeletewin;
 201         XIM xim;
 202         XIC xic;
 203         XftDraw *xft_draw;
 204         Visual *vis;
 205         int scr;
 206         bool isfixed; /* is fixed geometry? */
 207         int fx, fy, fw, fh; /* fixed geometry */
 208         int tw, th; /* tty width and height */
 209         int w;  /* window width */
 210         int h;  /* window height */
 211         int ch; /* char height */
 212         int cw; /* char width  */
 213         char state; /* focus, redraw, visible */
 214 } XWindow;
 215
 216 typedef struct {
 217         KeySym k;
 218         uint mask;
 219         char s[ESC_BUF_SIZ];
 220 } Key;
 221
 222 /* TODO: use better name for vars... */
 223 typedef struct {
 224         int mode;
 225         int bx, by;
 226         int ex, ey;
 227         struct {
 228                 int x, y;
 229         } b, e;
 230         char *clip;
 231         Atom xtarget;
 232         bool alt;
 233         struct timeval tclick1;
 234         struct timeval tclick2;
 235 } Selection;
 236
 237 #include "config.h"
 238
 239 /* Font structure */
 240 typedef struct {
 241         int height;
 242         int width;
 243         int ascent;
 244         int descent;
 245         short lbearing;
 246         short rbearing;
 247         XftFont *xft_set;
 248 } Font;
 249
 250 /* Drawing Context */
 251 typedef struct {
 252         XftColor xft_col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
 253         GC gc;
 254         Font font, bfont, ifont, ibfont;
 255 } DC;
 256
 257 static void die(const char *, ...);
 258 static void draw(void);
 259 static void redraw(void);
 260 static void drawregion(int, int, int, int);
 261 static void execsh(void);
 262 static void sigchld(int);
 263 static void run(void);
 264
 265 static void csidump(void);
 266 static void csihandle(void);
 267 static void csiparse(void);
 268 static void csireset(void);
 269 static void strdump(void);
 270 static void strhandle(void);
 271 static void strparse(void);
 272 static void strreset(void);
 273
 274 static void tclearregion(int, int, int, int);
 275 static void tcursor(int);
 276 static void tdeletechar(int);
 277 static void tdeleteline(int);
 278 static void tinsertblank(int);
 279 static void tinsertblankline(int);
 280 static void tmoveto(int, int);
 281 static void tnew(int, int);
 282 static void tnewline(int);
 283 static void tputtab(bool);
 284 static void tputc(char *, int);
 285 static void treset(void);
 286 static int tresize(int, int);
 287 static void tscrollup(int, int);
 288 static void tscrolldown(int, int);
 289 static void tsetattr(int*, int);
 290 static void tsetchar(char*);
 291 static void tsetscroll(int, int);
 292 static void tswapscreen(void);
 293 static void tsetdirt(int, int);
 294 static void tsetmode(bool, bool, int *, int);
 295 static void tfulldirt(void);
 296
 297 static void ttynew(void);
 298 static void ttyread(void);
 299 static void ttyresize(void);
 300 static void ttywrite(const char *, size_t);
 301
 302 static void xdraws(char *, Glyph, int, int, int, int);
 303 static void xhints(void);
 304 static void xclear(int, int, int, int);
 305 static void xclearborders(void);
 306 static void xdrawcursor(void);
 307 static void xinit(void);
 308 static void xloadcols(void);
 309 static void xresettitle(void);
 310 static void xseturgency(int);
 311 static void xsetsel(char*);
 312 static void xtermclear(int, int, int, int);
 313 static void xresize(int, int);
 314
 315 static void expose(XEvent *);
 316 static void visibility(XEvent *);
 317 static void unmap(XEvent *);
 318 static char *kmap(KeySym, uint);
 319 static void kpress(XEvent *);
 320 static void cmessage(XEvent *);
 321 static void resize(XEvent *);
 322 static void focus(XEvent *);
 323 static void brelease(XEvent *);
 324 static void bpress(XEvent *);
 325 static void bmotion(XEvent *);
 326 static void selnotify(XEvent *);
 327 static void selclear(XEvent *);
 328 static void selrequest(XEvent *);
 329
 330 static void selinit(void);
 331 static inline bool selected(int, int);
 332 static void selcopy(void);
 333 static void selpaste(void);
 334 static void selscroll(int, int);
 335
 336 static int utf8decode(char *, long *);
 337 static int utf8encode(long *, char *);
 338 static int utf8size(char *);
 339 static int isfullutf8(char *, int);
 340
 341 static void *xmalloc(size_t);
 342 static void *xrealloc(void *, size_t);
 343 static void *xcalloc(size_t nmemb, size_t size);
 344 static char *smstrcat(char *, ...);
 345
 346 static void (*handler[LASTEvent])(XEvent *) = {
 347         [KeyPress] = kpress,
 348         [ClientMessage] = cmessage,
 349         [ConfigureNotify] = resize,
 350         [VisibilityNotify] = visibility,
 351         [UnmapNotify] = unmap,
 352         [Expose] = expose,
 353         [FocusIn] = focus,
 354         [FocusOut] = focus,
 355         [MotionNotify] = bmotion,
 356         [ButtonPress] = bpress,
 357         [ButtonRelease] = brelease,
 358         [SelectionClear] = selclear,
 359         [SelectionNotify] = selnotify,
 360         [SelectionRequest] = selrequest,
 361 };
 362
 363 /* Globals */
 364 static DC dc;
 365 static XWindow xw;
 366 static Term term;
 367 static CSIEscape csiescseq;
 368 static STREscape strescseq;
 369 static int cmdfd;
 370 static pid_t pid;
 371 static Selection sel;
 372 static int iofd = -1;
 373 static char **opt_cmd = NULL;
 374 static char *opt_io = NULL;
 375 static char *opt_title = NULL;
 376 static char *opt_embed = NULL;
 377 static char *opt_class = NULL;
 378 static char *opt_font = NULL;
 379
 380 void *
 381 xmalloc(size_t len) {
 382         void *p = malloc(len);
 383
 384         if(!p)
 385                 die("Out of memory\n");
 386
 387         return p;
 388 }
 389
 390 void *
 391 xrealloc(void *p, size_t len) {
 392         if((p = realloc(p, len)) == NULL)
 393                 die("Out of memory\n");
 394
 395         return p;
 396 }
 397
 398 void *
 399 xcalloc(size_t nmemb, size_t size) {
 400         void *p = calloc(nmemb, size);
 401
 402         if(!p)
 403                 die("Out of memory\n");
 404
 405         return p;
 406 }
 407
 408 char *
 409 smstrcat(char *src, ...)
 410 {
 411         va_list fmtargs;
 412         char *ret, *p, *v;
 413         int len, slen, flen;
 414
 415         len = slen = strlen(src);
 416
 417         va_start(fmtargs, src);
 418         for(;;) {
 419                 v = va_arg(fmtargs, char *);
 420                 if(v == NULL)
 421                         break;
 422                 len += strlen(v);
 423         }
 424         va_end(fmtargs);
 425
 426         p = ret = xmalloc(len+1);
 427         memmove(p, src, slen);
 428         p += slen;
 429
 430         va_start(fmtargs, src);
 431         for(;;) {
 432                 v = va_arg(fmtargs, char *);
 433                 if(v == NULL)
 434                         break;
 435                 flen = strlen(v);
 436                 memmove(p, v, flen);
 437                 p += flen;
 438         }
 439         va_end(fmtargs);
 440
 441         ret[len] = '\0';
 442
 443         return ret;
 444 }
 445
 446 int
 447 utf8decode(char *s, long *u) {
 448         uchar c;
 449         int i, n, rtn;
 450
 451         rtn = 1;
 452         c = *s;
 453         if(~c & B7) { /* 0xxxxxxx */
 454                 *u = c;
 455                 return rtn;
 456         } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
 457                 *u = c&(B4|B3|B2|B1|B0);
 458                 n = 1;
 459         } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
 460                 *u = c&(B3|B2|B1|B0);
 461                 n = 2;
 462         } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
 463                 *u = c & (B2|B1|B0);
 464                 n = 3;
 465         } else {
 466                 goto invalid;
 467         }
 468
 469         for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
 470                 c = *s;
 471                 if((c & (B7|B6)) != B7) /* 10xxxxxx */
 472                         goto invalid;
 473                 *u <<= 6;
 474                 *u |= c & (B5|B4|B3|B2|B1|B0);
 475         }
 476
 477         if((n == 1 && *u < 0x80) ||
 478            (n == 2 && *u < 0x800) ||
 479            (n == 3 && *u < 0x10000) ||
 480            (*u >= 0xD800 && *u <= 0xDFFF)) {
 481                 goto invalid;
 482         }
 483
 484         return rtn;
 485 invalid:
 486         *u = 0xFFFD;
 487
 488         return rtn;
 489 }
 490
 491 int
 492 utf8encode(long *u, char *s) {
 493         uchar *sp;
 494         ulong uc;
 495         int i, n;
 496
 497         sp = (uchar *)s;
 498         uc = *u;
 499         if(uc < 0x80) {
 500                 *sp = uc; /* 0xxxxxxx */
 501                 return 1;
 502         } else if(*u < 0x800) {
 503                 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
 504                 n = 1;
 505         } else if(uc < 0x10000) {
 506                 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
 507                 n = 2;
 508         } else if(uc <= 0x10FFFF) {
 509                 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
 510                 n = 3;
 511         } else {
 512                 goto invalid;
 513         }
 514
 515         for(i=n,++sp; i>0; --i,++sp)
 516                 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
 517
 518         return n+1;
 519 invalid:
 520         /* U+FFFD */
 521         *s++ = '\xEF';
 522         *s++ = '\xBF';
 523         *s = '\xBD';
 524
 525         return 3;
 526 }
 527
 528 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
 529    UTF-8 otherwise return 0 */
 530 int
 531 isfullutf8(char *s, int b) {
 532         uchar *c1, *c2, *c3;
 533
 534         c1 = (uchar *)s;
 535         c2 = (uchar *)++s;
 536         c3 = (uchar *)++s;
 537         if(b < 1) {
 538                 return 0;
 539         } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
 540                 return 0;
 541         } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
 542             ((b == 1) ||
 543             ((b == 2) && (*c2&(B7|B6)) == B7))) {
 544                 return 0;
 545         } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
 546             ((b == 1) ||
 547             ((b == 2) && (*c2&(B7|B6)) == B7) ||
 548             ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
 549                 return 0;
 550         } else {
 551                 return 1;
 552         }
 553 }
 554
 555 int
 556 utf8size(char *s) {
 557         uchar c = *s;
 558
 559         if(~c&B7) {
 560                 return 1;
 561         } else if((c&(B7|B6|B5)) == (B7|B6)) {
 562                 return 2;
 563         } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
 564                 return 3;
 565         } else {
 566                 return 4;
 567         }
 568 }
 569
 570 void
 571 selinit(void) {
 572         memset(&sel.tclick1, 0, sizeof(sel.tclick1));
 573         memset(&sel.tclick2, 0, sizeof(sel.tclick2));
 574         sel.mode = 0;
 575         sel.bx = -1;
 576         sel.clip = NULL;
 577         sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
 578         if(sel.xtarget == None)
 579                 sel.xtarget = XA_STRING;
 580 }
 581
 582 static inline bool
 583 selected(int x, int y) {
 584         int bx, ex;
 585
 586         if(sel.ey == y && sel.by == y) {
 587                 bx = MIN(sel.bx, sel.ex);
 588                 ex = MAX(sel.bx, sel.ex);
 589                 return BETWEEN(x, bx, ex);
 590         }
 591
 592         return ((sel.b.y < y && y < sel.e.y)
 593                         || (y == sel.e.y && x <= sel.e.x))
 594                         || (y == sel.b.y && x >= sel.b.x
 595                                 && (x <= sel.e.x || sel.b.y != sel.e.y));
 596 }
 597
 598 void
 599 getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
 600         if(b)
 601                 *b = e->xbutton.button;
 602
 603         *x = X2COL(e->xbutton.x);
 604         *y = Y2ROW(e->xbutton.y);
 605         sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
 606         sel.b.y = MIN(sel.by, sel.ey);
 607         sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
 608         sel.e.y = MAX(sel.by, sel.ey);
 609 }
 610
 611 void
 612 mousereport(XEvent *e) {
 613         int x = X2COL(e->xbutton.x);
 614         int y = Y2ROW(e->xbutton.y);
 615         int button = e->xbutton.button;
 616         int state = e->xbutton.state;
 617         char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
 618         static int ob, ox, oy;
 619
 620         /* from urxvt */
 621         if(e->xbutton.type == MotionNotify) {
 622                 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
 623                         return;
 624                 button = ob + 32;
 625                 ox = x, oy = y;
 626         } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
 627                 button = 3;
 628         } else {
 629                 button -= Button1;
 630                 if(button >= 3)
 631                         button += 64 - 3;
 632                 if(e->xbutton.type == ButtonPress) {
 633                         ob = button;
 634                         ox = x, oy = y;
 635                 }
 636         }
 637
 638         buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
 639                 + (state & Mod4Mask    ? 8  : 0)
 640                 + (state & ControlMask ? 16 : 0);
 641
 642         ttywrite(buf, sizeof(buf));
 643 }
 644
 645 void
 646 bpress(XEvent *e) {
 647         if(IS_SET(MODE_MOUSE)) {
 648                 mousereport(e);
 649         } else if(e->xbutton.button == Button1) {
 650                 if(sel.bx != -1) {
 651                         sel.bx = -1;
 652                         tsetdirt(sel.b.y, sel.e.y);
 653                         draw();
 654                 }
 655                 sel.mode = 1;
 656                 sel.ex = sel.bx = X2COL(e->xbutton.x);
 657                 sel.ey = sel.by = Y2ROW(e->xbutton.y);
 658         }
 659 }
 660
 661 void
 662 selcopy(void) {
 663         char *str, *ptr, *p;
 664         int x, y, bufsize, is_selected = 0, size;
 665         Glyph *gp;
 666
 667         if(sel.bx == -1) {
 668                 str = NULL;
 669         } else {
 670                 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
 671                 ptr = str = xmalloc(bufsize);
 672
 673                 /* append every set & selected glyph to the selection */
 674                 for(y = 0; y < term.row; y++) {
 675                         for(x = 0; x < term.col; x++) {
 676                                 gp = &term.line[y][x];
 677
 678                                 if(!(is_selected = selected(x, y)))
 679                                         continue;
 680                                 p = (gp->state & GLYPH_SET) ? gp->c : " ";
 681                                 size = utf8size(p);
 682                                 memcpy(ptr, p, size);
 683                                 ptr += size;
 684                         }
 685                         /* \n at the end of every selected line except for the last one */
 686                         if(is_selected && y < sel.e.y)
 687                                 *ptr++ = '\n';
 688                 }
 689                 *ptr = 0;
 690         }
 691         sel.alt = IS_SET(MODE_ALTSCREEN);
 692         xsetsel(str);
 693 }
 694
 695 void
 696 selnotify(XEvent *e) {
 697         ulong nitems, ofs, rem;
 698         int format;
 699         uchar *data;
 700         Atom type;
 701
 702         ofs = 0;
 703         do {
 704                 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
 705                                         False, AnyPropertyType, &type, &format,
 706                                         &nitems, &rem, &data)) {
 707                         fprintf(stderr, "Clipboard allocation failed\n");
 708                         return;
 709                 }
 710                 ttywrite((const char *) data, nitems * format / 8);
 711                 XFree(data);
 712                 /* number of 32-bit chunks returned */
 713                 ofs += nitems * format / 32;
 714         } while(rem > 0);
 715 }
 716
 717 void
 718 selpaste(void) {
 719         XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
 720                         xw.win, CurrentTime);
 721 }
 722
 723 void selclear(XEvent *e) {
 724         if(sel.bx == -1)
 725                 return;
 726         sel.bx = -1;
 727         tsetdirt(sel.b.y, sel.e.y);
 728 }
 729
 730 void
 731 selrequest(XEvent *e) {
 732         XSelectionRequestEvent *xsre;
 733         XSelectionEvent xev;
 734         Atom xa_targets, string;
 735
 736         xsre = (XSelectionRequestEvent *) e;
 737         xev.type = SelectionNotify;
 738         xev.requestor = xsre->requestor;
 739         xev.selection = xsre->selection;
 740         xev.target = xsre->target;
 741         xev.time = xsre->time;
 742         /* reject */
 743         xev.property = None;
 744
 745         xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
 746         if(xsre->target == xa_targets) {
 747                 /* respond with the supported type */
 748                 string = sel.xtarget;
 749                 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
 750                                 XA_ATOM, 32, PropModeReplace,
 751                                 (uchar *) &string, 1);
 752                 xev.property = xsre->property;
 753         } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
 754                 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
 755                                 xsre->target, 8, PropModeReplace,
 756                                 (uchar *) sel.clip, strlen(sel.clip));
 757                 xev.property = xsre->property;
 758         }
 759
 760         /* all done, send a notification to the listener */
 761         if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
 762                 fprintf(stderr, "Error sending SelectionNotify event\n");
 763 }
 764
 765 void
 766 xsetsel(char *str) {
 767         /* register the selection for both the clipboard and the primary */
 768         Atom clipboard;
 769
 770         free(sel.clip);
 771         sel.clip = str;
 772
 773         XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
 774
 775         clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 776         XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
 777 }
 778
 779 void
 780 brelease(XEvent *e) {
 781         struct timeval now;
 782
 783         if(IS_SET(MODE_MOUSE)) {
 784                 mousereport(e);
 785                 return;
 786         }
 787
 788         if(e->xbutton.button == Button2) {
 789                 selpaste();
 790         } else if(e->xbutton.button == Button1) {
 791                 sel.mode = 0;
 792                 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
 793                 term.dirty[sel.ey] = 1;
 794                 if(sel.bx == sel.ex && sel.by == sel.ey) {
 795                         sel.bx = -1;
 796                         gettimeofday(&now, NULL);
 797
 798                         if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
 799                                 /* triple click on the line */
 800                                 sel.b.x = sel.bx = 0;
 801                                 sel.e.x = sel.ex = term.col;
 802                                 sel.b.y = sel.e.y = sel.ey;
 803                                 selcopy();
 804                         } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
 805                                 /* double click to select word */
 806                                 sel.bx = sel.ex;
 807                                 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
 808                                                 term.line[sel.ey][sel.bx-1].c[0] != ' ') {
 809                                         sel.bx--;
 810                                 }
 811                                 sel.b.x = sel.bx;
 812                                 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
 813                                                 term.line[sel.ey][sel.ex+1].c[0] != ' ') {
 814                                         sel.ex++;
 815                                 }
 816                                 sel.e.x = sel.ex;
 817                                 sel.b.y = sel.e.y = sel.ey;
 818                                 selcopy();
 819                         }
 820                 } else {
 821                         selcopy();
 822                 }
 823         }
 824
 825         memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
 826         gettimeofday(&sel.tclick1, NULL);
 827 }
 828
 829 void
 830 bmotion(XEvent *e) {
 831         int starty, endy, oldey, oldex;
 832
 833         if(IS_SET(MODE_MOUSE)) {
 834                 mousereport(e);
 835                 return;
 836         }
 837
 838         if(sel.mode) {
 839                 oldey = sel.ey;
 840                 oldex = sel.ex;
 841                 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
 842
 843                 if(oldey != sel.ey || oldex != sel.ex) {
 844                         starty = MIN(oldey, sel.ey);
 845                         endy = MAX(oldey, sel.ey);
 846                         tsetdirt(starty, endy);
 847                 }
 848         }
 849 }
 850
 851 void
 852 die(const char *errstr, ...) {
 853         va_list ap;
 854
 855         va_start(ap, errstr);
 856         vfprintf(stderr, errstr, ap);
 857         va_end(ap);
 858         exit(EXIT_FAILURE);
 859 }
 860
 861 void
 862 execsh(void) {
 863         char **args;
 864         char *envshell = getenv("SHELL");
 865
 866         unsetenv("COLUMNS");
 867         unsetenv("LINES");
 868         unsetenv("TERMCAP");
 869
 870         signal(SIGCHLD, SIG_DFL);
 871         signal(SIGHUP, SIG_DFL);
 872         signal(SIGINT, SIG_DFL);
 873         signal(SIGQUIT, SIG_DFL);
 874         signal(SIGTERM, SIG_DFL);
 875         signal(SIGALRM, SIG_DFL);
 876
 877         DEFAULT(envshell, SHELL);
 878         putenv("TERM="TNAME);
 879         args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
 880         execvp(args[0], args);
 881         exit(EXIT_FAILURE);
 882 }
 883
 884 void
 885 sigchld(int a) {
 886         int stat = 0;
 887
 888         if(waitpid(pid, &stat, 0) < 0)
 889                 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
 890
 891         if(WIFEXITED(stat)) {
 892                 exit(WEXITSTATUS(stat));
 893         } else {
 894                 exit(EXIT_FAILURE);
 895         }
 896 }
 897
 898 void
 899 ttynew(void) {
 900         int m, s;
 901         struct winsize w = {term.row, term.col, 0, 0};
 902
 903         /* seems to work fine on linux, openbsd and freebsd */
 904         if(openpty(&m, &s, NULL, NULL, &w) < 0)
 905                 die("openpty failed: %s\n", SERRNO);
 906
 907         switch(pid = fork()) {
 908         case -1:
 909                 die("fork failed\n");
 910                 break;
 911         case 0:
 912                 setsid(); /* create a new process group */
 913                 dup2(s, STDIN_FILENO);
 914                 dup2(s, STDOUT_FILENO);
 915                 dup2(s, STDERR_FILENO);
 916                 if(ioctl(s, TIOCSCTTY, NULL) < 0)
 917                         die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
 918                 close(s);
 919                 close(m);
 920                 execsh();
 921                 break;
 922         default:
 923                 close(s);
 924                 cmdfd = m;
 925                 signal(SIGCHLD, sigchld);
 926                 if(opt_io) {
 927                         if(!strcmp(opt_io, "-")) {
 928                                 iofd = STDOUT_FILENO;
 929                         } else {
 930                                 if((iofd = open(opt_io, O_WRONLY | O_CREAT, 0666)) < 0) {
 931                                         fprintf(stderr, "Error opening %s:%s\n",
 932                                                 opt_io, strerror(errno));
 933                                 }
 934                         }
 935                 }
 936         }
 937 }
 938
 939 void
 940 dump(char c) {
 941         static int col;
 942
 943         fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
 944         if(++col % 10 == 0)
 945                 fprintf(stderr, "\n");
 946 }
 947
 948 void
 949 ttyread(void) {
 950         static char buf[BUFSIZ];
 951         static int buflen = 0;
 952         char *ptr;
 953         char s[UTF_SIZ];
 954         int charsize; /* size of utf8 char in bytes */
 955         long utf8c;
 956         int ret;
 957
 958         /* append read bytes to unprocessed bytes */
 959         if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
 960                 die("Couldn't read from shell: %s\n", SERRNO);
 961
 962         /* process every complete utf8 char */
 963         buflen += ret;
 964         ptr = buf;
 965         while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
 966                 charsize = utf8decode(ptr, &utf8c);
 967                 utf8encode(&utf8c, s);
 968                 tputc(s, charsize);
 969                 ptr += charsize;
 970                 buflen -= charsize;
 971         }
 972
 973         /* keep any uncomplete utf8 char for the next call */
 974         memmove(buf, ptr, buflen);
 975 }
 976
 977 void
 978 ttywrite(const char *s, size_t n) {
 979         if(write(cmdfd, s, n) == -1)
 980                 die("write error on tty: %s\n", SERRNO);
 981 }
 982
 983 void
 984 ttyresize(void) {
 985         struct winsize w;
 986
 987         w.ws_row = term.row;
 988         w.ws_col = term.col;
 989         w.ws_xpixel = xw.tw;
 990         w.ws_ypixel = xw.th;
 991         if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
 992                 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
 993 }
 994
 995 void
 996 tsetdirt(int top, int bot) {
 997         int i;
 998
 999         LIMIT(top, 0, term.row-1);
1000         LIMIT(bot, 0, term.row-1);
1001
1002         for(i = top; i <= bot; i++)
1003                 term.dirty[i] = 1;
1004 }
1005
1006 void
1007 tfulldirt(void) {
1008         tsetdirt(0, term.row-1);
1009 }
1010
1011 void
1012 tcursor(int mode) {
1013         static TCursor c;
1014
1015         if(mode == CURSOR_SAVE) {
1016                 c = term.c;
1017         } else if(mode == CURSOR_LOAD) {
1018                 term.c = c;
1019                 tmoveto(c.x, c.y);
1020         }
1021 }
1022
1023 void
1024 treset(void) {
1025         uint i;
1026
1027         term.c = (TCursor){{
1028                 .mode = ATTR_NULL,
1029                 .fg = DefaultFG,
1030                 .bg = DefaultBG
1031         }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1032
1033         memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1034         for(i = TAB; i < term.col; i += TAB)
1035                 term.tabs[i] = 1;
1036         term.top = 0;
1037         term.bot = term.row - 1;
1038         term.mode = MODE_WRAP;
1039
1040         tclearregion(0, 0, term.col-1, term.row-1);
1041 }
1042
1043 void
1044 tnew(int col, int row) {
1045         /* set screen size */
1046         term.row = row;
1047         term.col = col;
1048         term.line = xmalloc(term.row * sizeof(Line));
1049         term.alt  = xmalloc(term.row * sizeof(Line));
1050         term.dirty = xmalloc(term.row * sizeof(*term.dirty));
1051         term.tabs = xmalloc(term.col * sizeof(*term.tabs));
1052
1053         for(row = 0; row < term.row; row++) {
1054                 term.line[row] = xmalloc(term.col * sizeof(Glyph));
1055                 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
1056                 term.dirty[row] = 0;
1057         }
1058         memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1059         /* setup screen */
1060         treset();
1061 }
1062
1063 void
1064 tswapscreen(void) {
1065         Line *tmp = term.line;
1066
1067         term.line = term.alt;
1068         term.alt = tmp;
1069         term.mode ^= MODE_ALTSCREEN;
1070         tfulldirt();
1071 }
1072
1073 void
1074 tscrolldown(int orig, int n) {
1075         int i;
1076         Line temp;
1077
1078         LIMIT(n, 0, term.bot-orig+1);
1079
1080         tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1081
1082         for(i = term.bot; i >= orig+n; i--) {
1083                 temp = term.line[i];
1084                 term.line[i] = term.line[i-n];
1085                 term.line[i-n] = temp;
1086
1087                 term.dirty[i] = 1;
1088                 term.dirty[i-n] = 1;
1089         }
1090
1091         selscroll(orig, n);
1092 }
1093
1094 void
1095 tscrollup(int orig, int n) {
1096         int i;
1097         Line temp;
1098         LIMIT(n, 0, term.bot-orig+1);
1099
1100         tclearregion(0, orig, term.col-1, orig+n-1);
1101
1102         for(i = orig; i <= term.bot-n; i++) {
1103                  temp = term.line[i];
1104                  term.line[i] = term.line[i+n];
1105                  term.line[i+n] = temp;
1106
1107                  term.dirty[i] = 1;
1108                  term.dirty[i+n] = 1;
1109         }
1110
1111         selscroll(orig, -n);
1112 }
1113
1114 void
1115 selscroll(int orig, int n) {
1116         if(sel.bx == -1)
1117                 return;
1118
1119         if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1120                 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1121                         sel.bx = -1;
1122                         return;
1123                 }
1124                 if(sel.by < term.top) {
1125                         sel.by = term.top;
1126                         sel.bx = 0;
1127                 }
1128                 if(sel.ey > term.bot) {
1129                         sel.ey = term.bot;
1130                         sel.ex = term.col;
1131                 }
1132                 sel.b.y = sel.by, sel.b.x = sel.bx;
1133                 sel.e.y = sel.ey, sel.e.x = sel.ex;
1134         }
1135 }
1136
1137 void
1138 tnewline(int first_col) {
1139         int y = term.c.y;
1140
1141         if(y == term.bot) {
1142                 tscrollup(term.top, 1);
1143         } else {
1144                 y++;
1145         }
1146         tmoveto(first_col ? 0 : term.c.x, y);
1147 }
1148
1149 void
1150 csiparse(void) {
1151         /* int noarg = 1; */
1152         char *p = csiescseq.buf;
1153
1154         csiescseq.narg = 0;
1155         if(*p == '?')
1156                 csiescseq.priv = 1, p++;
1157
1158         while(p < csiescseq.buf+csiescseq.len) {
1159                 while(isdigit(*p)) {
1160                         csiescseq.arg[csiescseq.narg] *= 10;
1161                         csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1162                 }
1163                 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ) {
1164                         csiescseq.narg++, p++;
1165                 } else {
1166                         csiescseq.mode = *p;
1167                         csiescseq.narg++;
1168
1169                         return;
1170                 }
1171         }
1172 }
1173
1174 void
1175 tmoveto(int x, int y) {
1176         LIMIT(x, 0, term.col-1);
1177         LIMIT(y, 0, term.row-1);
1178         term.c.state &= ~CURSOR_WRAPNEXT;
1179         term.c.x = x;
1180         term.c.y = y;
1181 }
1182
1183 void
1184 tsetchar(char *c) {
1185         char *vt100_0[62] = { /* 0x41 - 0x7e */
1186                 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1187                 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1188                 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1189                 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1190                 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1191                 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1192                 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1193                 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1194         };
1195
1196         /*
1197          * The table is proudly stolen from rxvt.
1198          */
1199         if(term.c.attr.mode & ATTR_GFX) {
1200                 if(c[0] >= 0x41 && c[0] <= 0x7e
1201                                 && vt100_0[c[0] - 0x41]) {
1202                         c = vt100_0[c[0] - 0x41];
1203                 }
1204         }
1205
1206         term.dirty[term.c.y] = 1;
1207         term.line[term.c.y][term.c.x] = term.c.attr;
1208         memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
1209         term.line[term.c.y][term.c.x].state |= GLYPH_SET;
1210 }
1211
1212 void
1213 tclearregion(int x1, int y1, int x2, int y2) {
1214         int x, y, temp;
1215
1216         if(x1 > x2)
1217                 temp = x1, x1 = x2, x2 = temp;
1218         if(y1 > y2)
1219                 temp = y1, y1 = y2, y2 = temp;
1220
1221         LIMIT(x1, 0, term.col-1);
1222         LIMIT(x2, 0, term.col-1);
1223         LIMIT(y1, 0, term.row-1);
1224         LIMIT(y2, 0, term.row-1);
1225
1226         for(y = y1; y <= y2; y++) {
1227                 term.dirty[y] = 1;
1228                 for(x = x1; x <= x2; x++)
1229                         term.line[y][x].state = 0;
1230         }
1231 }
1232
1233 void
1234 tdeletechar(int n) {
1235         int src = term.c.x + n;
1236         int dst = term.c.x;
1237         int size = term.col - src;
1238
1239         term.dirty[term.c.y] = 1;
1240
1241         if(src >= term.col) {
1242                 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1243                 return;
1244         }
1245
1246         memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1247                         size * sizeof(Glyph));
1248         tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1249 }
1250
1251 void
1252 tinsertblank(int n) {
1253         int src = term.c.x;
1254         int dst = src + n;
1255         int size = term.col - dst;
1256
1257         term.dirty[term.c.y] = 1;
1258
1259         if(dst >= term.col) {
1260                 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1261                 return;
1262         }
1263
1264         memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1265                         size * sizeof(Glyph));
1266         tclearregion(src, term.c.y, dst - 1, term.c.y);
1267 }
1268
1269 void
1270 tinsertblankline(int n) {
1271         if(term.c.y < term.top || term.c.y > term.bot)
1272                 return;
1273
1274         tscrolldown(term.c.y, n);
1275 }
1276
1277 void
1278 tdeleteline(int n) {
1279         if(term.c.y < term.top || term.c.y > term.bot)
1280                 return;
1281
1282         tscrollup(term.c.y, n);
1283 }
1284
1285 void
1286 tsetattr(int *attr, int l) {
1287         int i;
1288
1289         for(i = 0; i < l; i++) {
1290                 switch(attr[i]) {
1291                 case 0:
1292                         term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1293                                         | ATTR_ITALIC | ATTR_BLINK);
1294                         term.c.attr.fg = DefaultFG;
1295                         term.c.attr.bg = DefaultBG;
1296                         break;
1297                 case 1:
1298                         term.c.attr.mode |= ATTR_BOLD;
1299                         break;
1300                 case 3: /* enter standout (highlight) */
1301                         term.c.attr.mode |= ATTR_ITALIC;
1302                         break;
1303                 case 4:
1304                         term.c.attr.mode |= ATTR_UNDERLINE;
1305                         break;
1306                 case 5:
1307                         term.c.attr.mode |= ATTR_BLINK;
1308                         break;
1309                 case 7:
1310                         term.c.attr.mode |= ATTR_REVERSE;
1311                         break;
1312                 case 21:
1313                 case 22:
1314                         term.c.attr.mode &= ~ATTR_BOLD;
1315                         break;
1316                 case 23: /* leave standout (highlight) mode */
1317                         term.c.attr.mode &= ~ATTR_ITALIC;
1318                         break;
1319                 case 24:
1320                         term.c.attr.mode &= ~ATTR_UNDERLINE;
1321                         break;
1322                 case 25:
1323                         term.c.attr.mode &= ~ATTR_BLINK;
1324                         break;
1325                 case 27:
1326                         term.c.attr.mode &= ~ATTR_REVERSE;
1327                         break;
1328                 case 38:
1329                         if(i + 2 < l && attr[i + 1] == 5) {
1330                                 i += 2;
1331                                 if(BETWEEN(attr[i], 0, 255)) {
1332                                         term.c.attr.fg = attr[i];
1333                                 } else {
1334                                         fprintf(stderr,
1335                                                 "erresc: bad fgcolor %d\n",
1336                                                 attr[i]);
1337                                 }
1338                         } else {
1339                                 fprintf(stderr,
1340                                         "erresc(38): gfx attr %d unknown\n",
1341                                         attr[i]);
1342                         }
1343                         break;
1344                 case 39:
1345                         term.c.attr.fg = DefaultFG;
1346                         break;
1347                 case 48:
1348                         if(i + 2 < l && attr[i + 1] == 5) {
1349                                 i += 2;
1350                                 if(BETWEEN(attr[i], 0, 255)) {
1351                                         term.c.attr.bg = attr[i];
1352                                 } else {
1353                                         fprintf(stderr,
1354                                                 "erresc: bad bgcolor %d\n",
1355                                                 attr[i]);
1356                                 }
1357                         } else {
1358                                 fprintf(stderr,
1359                                         "erresc(48): gfx attr %d unknown\n",
1360                                         attr[i]);
1361                         }
1362                         break;
1363                 case 49:
1364                         term.c.attr.bg = DefaultBG;
1365                         break;
1366                 default:
1367                         if(BETWEEN(attr[i], 30, 37)) {
1368                                 term.c.attr.fg = attr[i] - 30;
1369                         } else if(BETWEEN(attr[i], 40, 47)) {
1370                                 term.c.attr.bg = attr[i] - 40;
1371                         } else if(BETWEEN(attr[i], 90, 97)) {
1372                                 term.c.attr.fg = attr[i] - 90 + 8;
1373                         } else if(BETWEEN(attr[i], 100, 107)) {
1374                                 term.c.attr.bg = attr[i] - 100 + 8;
1375                         } else {
1376                                 fprintf(stderr,
1377                                         "erresc(default): gfx attr %d unknown\n",
1378                                         attr[i]), csidump();
1379                         }
1380                         break;
1381                 }
1382         }
1383 }
1384
1385 void
1386 tsetscroll(int t, int b) {
1387         int temp;
1388
1389         LIMIT(t, 0, term.row-1);
1390         LIMIT(b, 0, term.row-1);
1391         if(t > b) {
1392                 temp = t;
1393                 t = b;
1394                 b = temp;
1395         }
1396         term.top = t;
1397         term.bot = b;
1398 }
1399
1400 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1401
1402 void
1403 tsetmode(bool priv, bool set, int *args, int narg) {
1404         int *lim, mode;
1405
1406         for(lim = args + narg; args < lim; ++args) {
1407                 if(priv) {
1408                         switch(*args) {
1409                                 break;
1410                         case 1: /* DECCKM -- Cursor key */
1411                                 MODBIT(term.mode, set, MODE_APPKEYPAD);
1412                                 break;
1413                         case 5: /* DECSCNM -- Reverse video */
1414                                 mode = term.mode;
1415                                 MODBIT(term.mode, set, MODE_REVERSE);
1416                                 if(mode != term.mode)
1417                                         redraw();
1418                                 break;
1419                         case 6: /* XXX: DECOM -- Origin */
1420                                 break;
1421                         case 7: /* DECAWM -- Auto wrap */
1422                                 MODBIT(term.mode, set, MODE_WRAP);
1423                                 break;
1424                         case 8: /* XXX: DECARM -- Auto repeat */
1425                                 break;
1426                         case 0:  /* Error (IGNORED) */
1427                         case 12: /* att610 -- Start blinking cursor (IGNORED) */
1428                                 break;
1429                         case 25:
1430                                 MODBIT(term.c.state, !set, CURSOR_HIDE);
1431                                 break;
1432                         case 1000: /* 1000,1002: enable xterm mouse report */
1433                                 MODBIT(term.mode, set, MODE_MOUSEBTN);
1434                                 break;
1435                         case 1002:
1436                                 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1437                                 break;
1438                         case 1049: /* = 1047 and 1048 */
1439                         case 47:
1440                         case 1047:
1441                                 if(IS_SET(MODE_ALTSCREEN))
1442                                         tclearregion(0, 0, term.col-1, term.row-1);
1443                                 if((set && !IS_SET(MODE_ALTSCREEN)) ||
1444                                                 (!set && IS_SET(MODE_ALTSCREEN))) {
1445                                         tswapscreen();
1446                                 }
1447                                 if(*args != 1049)
1448                                         break;
1449                                 /* pass through */
1450                         case 1048:
1451                                 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1452                                 break;
1453                         default:
1454                         /* case 2:  DECANM -- ANSI/VT52 (NOT SUPPOURTED) */
1455                         /* case 3:  DECCOLM -- Column  (NOT SUPPORTED) */
1456                         /* case 4:  DECSCLM -- Scroll (NOT SUPPORTED) */
1457                         /* case 18: DECPFF -- Printer feed (NOT SUPPORTED) */
1458                         /* case 19: DECPEX -- Printer extent (NOT SUPPORTED) */
1459                         /* case 42: DECNRCM -- National characters (NOT SUPPORTED) */
1460                                 fprintf(stderr,
1461                                         "erresc: unknown private set/reset mode %d\n",
1462                                         *args);
1463                                 break;
1464                         }
1465                 } else {
1466                         switch(*args) {
1467                         case 0:  /* Error (IGNORED) */
1468                                 break;
1469                         case 2:  /* KAM -- keyboard action */
1470                                 MODBIT(term.mode, set, MODE_KBDLOCK);
1471                                 break;
1472                         case 4:  /* IRM -- Insertion-replacement */
1473                                 MODBIT(term.mode, set, MODE_INSERT);
1474                                 break;
1475                         case 12: /* XXX: SRM -- Send/Receive */
1476                                 break;
1477                         case 20: /* LNM -- Linefeed/new line */
1478                                 MODBIT(term.mode, set, MODE_CRLF);
1479                                 break;
1480                         default:
1481                                 fprintf(stderr,
1482                                         "erresc: unknown set/reset mode %d\n",
1483                                         *args);
1484                                 break;
1485                         }
1486                 }
1487         }
1488 }
1489 #undef MODBIT
1490
1491
1492 void
1493 csihandle(void) {
1494         switch(csiescseq.mode) {
1495         default:
1496         unknown:
1497                 fprintf(stderr, "erresc: unknown csi ");
1498                 csidump();
1499                 /* die(""); */
1500                 break;
1501         case '@': /* ICH -- Insert <n> blank char */
1502                 DEFAULT(csiescseq.arg[0], 1);
1503                 tinsertblank(csiescseq.arg[0]);
1504                 break;
1505         case 'A': /* CUU -- Cursor <n> Up */
1506         case 'e':
1507                 DEFAULT(csiescseq.arg[0], 1);
1508                 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1509                 break;
1510         case 'B': /* CUD -- Cursor <n> Down */
1511                 DEFAULT(csiescseq.arg[0], 1);
1512                 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1513                 break;
1514         case 'C': /* CUF -- Cursor <n> Forward */
1515         case 'a':
1516                 DEFAULT(csiescseq.arg[0], 1);
1517                 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1518                 break;
1519         case 'D': /* CUB -- Cursor <n> Backward */
1520                 DEFAULT(csiescseq.arg[0], 1);
1521                 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1522                 break;
1523         case 'E': /* CNL -- Cursor <n> Down and first col */
1524                 DEFAULT(csiescseq.arg[0], 1);
1525                 tmoveto(0, term.c.y+csiescseq.arg[0]);
1526                 break;
1527         case 'F': /* CPL -- Cursor <n> Up and first col */
1528                 DEFAULT(csiescseq.arg[0], 1);
1529                 tmoveto(0, term.c.y-csiescseq.arg[0]);
1530                 break;
1531         case 'g': /* TBC -- Tabulation clear */
1532                 switch (csiescseq.arg[0]) {
1533                 case 0: /* clear current tab stop */
1534                         term.tabs[term.c.x] = 0;
1535                         break;
1536                 case 3: /* clear all the tabs */
1537                         memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1538                         break;
1539                 default:
1540                         goto unknown;
1541                 }
1542                 break;
1543         case 'G': /* CHA -- Move to <col> */
1544         case '`': /* HPA */
1545                 DEFAULT(csiescseq.arg[0], 1);
1546                 tmoveto(csiescseq.arg[0]-1, term.c.y);
1547                 break;
1548         case 'H': /* CUP -- Move to <row> <col> */
1549         case 'f': /* HVP */
1550                 DEFAULT(csiescseq.arg[0], 1);
1551                 DEFAULT(csiescseq.arg[1], 1);
1552                 tmoveto(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1553                 break;
1554         case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1555                 DEFAULT(csiescseq.arg[0], 1);
1556                 while(csiescseq.arg[0]--)
1557                         tputtab(1);
1558                 break;
1559         case 'J': /* ED -- Clear screen */
1560                 sel.bx = -1;
1561                 switch(csiescseq.arg[0]) {
1562                 case 0: /* below */
1563                         tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1564                         if(term.c.y < term.row-1)
1565                                 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1566                         break;
1567                 case 1: /* above */
1568                         if(term.c.y > 1)
1569                                 tclearregion(0, 0, term.col-1, term.c.y-1);
1570                         tclearregion(0, term.c.y, term.c.x, term.c.y);
1571                         break;
1572                 case 2: /* all */
1573                         tclearregion(0, 0, term.col-1, term.row-1);
1574                         break;
1575                 default:
1576                         goto unknown;
1577                 }
1578                 break;
1579         case 'K': /* EL -- Clear line */
1580                 switch(csiescseq.arg[0]) {
1581                 case 0: /* right */
1582                         tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1583                         break;
1584                 case 1: /* left */
1585                         tclearregion(0, term.c.y, term.c.x, term.c.y);
1586                         break;
1587                 case 2: /* all */
1588                         tclearregion(0, term.c.y, term.col-1, term.c.y);
1589                         break;
1590                 }
1591                 break;
1592         case 'S': /* SU -- Scroll <n> line up */
1593                 DEFAULT(csiescseq.arg[0], 1);
1594                 tscrollup(term.top, csiescseq.arg[0]);
1595                 break;
1596         case 'T': /* SD -- Scroll <n> line down */
1597                 DEFAULT(csiescseq.arg[0], 1);
1598                 tscrolldown(term.top, csiescseq.arg[0]);
1599                 break;
1600         case 'L': /* IL -- Insert <n> blank lines */
1601                 DEFAULT(csiescseq.arg[0], 1);
1602                 tinsertblankline(csiescseq.arg[0]);
1603                 break;
1604         case 'l': /* RM -- Reset Mode */
1605                 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1606                 break;
1607         case 'M': /* DL -- Delete <n> lines */
1608                 DEFAULT(csiescseq.arg[0], 1);
1609                 tdeleteline(csiescseq.arg[0]);
1610                 break;
1611         case 'X': /* ECH -- Erase <n> char */
1612                 DEFAULT(csiescseq.arg[0], 1);
1613                 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
1614                 break;
1615         case 'P': /* DCH -- Delete <n> char */
1616                 DEFAULT(csiescseq.arg[0], 1);
1617                 tdeletechar(csiescseq.arg[0]);
1618                 break;
1619         case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1620                 DEFAULT(csiescseq.arg[0], 1);
1621                 while(csiescseq.arg[0]--)
1622                         tputtab(0);
1623                 break;
1624         case 'd': /* VPA -- Move to <row> */
1625                 DEFAULT(csiescseq.arg[0], 1);
1626                 tmoveto(term.c.x, csiescseq.arg[0]-1);
1627                 break;
1628         case 'h': /* SM -- Set terminal mode */
1629                 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1630                 break;
1631         case 'm': /* SGR -- Terminal attribute (color) */
1632                 tsetattr(csiescseq.arg, csiescseq.narg);
1633                 break;
1634         case 'r': /* DECSTBM -- Set Scrolling Region */
1635                 if(csiescseq.priv) {
1636                         goto unknown;
1637                 } else {
1638                         DEFAULT(csiescseq.arg[0], 1);
1639                         DEFAULT(csiescseq.arg[1], term.row);
1640                         tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1641                         tmoveto(0, 0);
1642                 }
1643                 break;
1644         case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1645                 tcursor(CURSOR_SAVE);
1646                 break;
1647         case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1648                 tcursor(CURSOR_LOAD);
1649                 break;
1650         }
1651 }
1652
1653 void
1654 csidump(void) {
1655         int i;
1656         uint c;
1657
1658         printf("ESC[");
1659         for(i = 0; i < csiescseq.len; i++) {
1660                 c = csiescseq.buf[i] & 0xff;
1661                 if(isprint(c)) {
1662                         putchar(c);
1663                 } else if(c == '\n') {
1664                         printf("(\\n)");
1665                 } else if(c == '\r') {
1666                         printf("(\\r)");
1667                 } else if(c == 0x1b) {
1668                         printf("(\\e)");
1669                 } else {
1670                         printf("(%02x)", c);
1671                 }
1672         }
1673         putchar('\n');
1674 }
1675
1676 void
1677 csireset(void) {
1678         memset(&csiescseq, 0, sizeof(csiescseq));
1679 }
1680
1681 void
1682 strhandle(void) {
1683         char *p;
1684
1685         /*
1686          * TODO: make this being useful in case of color palette change.
1687          */
1688         strparse();
1689
1690         p = strescseq.buf;
1691
1692         switch(strescseq.type) {
1693         case ']': /* OSC -- Operating System Command */
1694                 switch(p[0]) {
1695                 case '0':
1696                 case '1':
1697                 case '2':
1698                         /*
1699                          * TODO: Handle special chars in string, like umlauts.
1700                          */
1701                         if(p[1] == ';') {
1702                                 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1703                         }
1704                         break;
1705                 case ';':
1706                         XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1707                         break;
1708                 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1709                         break;
1710                 default:
1711                         fprintf(stderr, "erresc: unknown str ");
1712                         strdump();
1713                         break;
1714                 }
1715                 break;
1716         case 'k': /* old title set compatibility */
1717                 XStoreName(xw.dpy, xw.win, strescseq.buf);
1718                 break;
1719         case 'P': /* DSC -- Device Control String */
1720         case '_': /* APC -- Application Program Command */
1721         case '^': /* PM -- Privacy Message */
1722         default:
1723                 fprintf(stderr, "erresc: unknown str ");
1724                 strdump();
1725                 /* die(""); */
1726                 break;
1727         }
1728 }
1729
1730 void
1731 strparse(void) {
1732         /*
1733          * TODO: Implement parsing like for CSI when required.
1734          * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1735          */
1736         return;
1737 }
1738
1739 void
1740 strdump(void) {
1741         int i;
1742         uint c;
1743
1744         printf("ESC%c", strescseq.type);
1745         for(i = 0; i < strescseq.len; i++) {
1746                 c = strescseq.buf[i] & 0xff;
1747                 if(isprint(c)) {
1748                         putchar(c);
1749                 } else if(c == '\n') {
1750                         printf("(\\n)");
1751                 } else if(c == '\r') {
1752                         printf("(\\r)");
1753                 } else if(c == 0x1b) {
1754                         printf("(\\e)");
1755                 } else {
1756                         printf("(%02x)", c);
1757                 }
1758         }
1759         printf("ESC\\\n");
1760 }
1761
1762 void
1763 strreset(void) {
1764         memset(&strescseq, 0, sizeof(strescseq));
1765 }
1766
1767 void
1768 tputtab(bool forward) {
1769         uint x = term.c.x;
1770
1771         if(forward) {
1772                 if(x == term.col)
1773                         return;
1774                 for(++x; x < term.col && !term.tabs[x]; ++x)
1775                         /* nothing */ ;
1776         } else {
1777                 if(x == 0)
1778                         return;
1779                 for(--x; x > 0 && !term.tabs[x]; --x)
1780                         /* nothing */ ;
1781         }
1782         tmoveto(x, term.c.y);
1783 }
1784
1785 void
1786 tputc(char *c, int len) {
1787         uchar ascii = *c;
1788
1789         if(iofd != -1)
1790                 write(iofd, c, len);
1791
1792         switch(ascii) {
1793         case '\t':
1794                 tputtab(1);
1795                 return;
1796         case '\b':
1797                 tmoveto(term.c.x-1, term.c.y);
1798                 return;
1799         case '\r':
1800                 tmoveto(0, term.c.y);
1801                 return;
1802         case '\f':
1803         case '\v':
1804         case '\n':
1805                 /* go to first col if the mode is set */
1806                 tnewline(IS_SET(MODE_CRLF));
1807                 return;
1808         case '\a':
1809                 if(term.esc & ESC_STR)
1810                         break;
1811
1812                 if(!(xw.state & WIN_FOCUSED))
1813                         xseturgency(1);
1814                 return;
1815         case '\033':
1816                 csireset();
1817                 term.esc = ESC_START;
1818                 return;
1819         }
1820
1821         if(term.esc & ESC_START) {
1822                 if(term.esc & ESC_CSI) {
1823                         csiescseq.buf[csiescseq.len++] = ascii;
1824                         if(BETWEEN(ascii, 0x40, 0x7E)
1825                                         || csiescseq.len >= ESC_BUF_SIZ) {
1826                                 term.esc = 0;
1827                                 csiparse(), csihandle();
1828                         }
1829                 } else if(term.esc & ESC_STR) {
1830                         switch(ascii) {
1831                         case '\033':
1832                                 term.esc = ESC_START | ESC_STR_END;
1833                                 break;
1834                         case '\a': /* backwards compatibility to xterm */
1835                                 term.esc = 0;
1836                                 strhandle();
1837                                 break;
1838                         default:
1839                                 strescseq.buf[strescseq.len++] = ascii;
1840                                 if(strescseq.len+1 >= STR_BUF_SIZ) {
1841                                         term.esc = 0;
1842                                         strhandle();
1843                                 }
1844                         }
1845                 } else if(term.esc & ESC_STR_END) {
1846                         term.esc = 0;
1847                         if(ascii == '\\')
1848                                 strhandle();
1849                 } else if(term.esc & ESC_ALTCHARSET) {
1850                         switch(ascii) {
1851                         case '0': /* Line drawing set */
1852                                 term.c.attr.mode |= ATTR_GFX;
1853                                 break;
1854                         case 'B': /* USASCII */
1855                                 term.c.attr.mode &= ~ATTR_GFX;
1856                                 break;
1857                         case 'A': /* UK (IGNORED) */
1858                         case '<': /* multinational charset (IGNORED) */
1859                         case '5': /* Finnish (IGNORED) */
1860                         case 'C': /* Finnish (IGNORED) */
1861                         case 'K': /* German (IGNORED) */
1862                                 break;
1863                         default:
1864                                 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1865                         }
1866                         term.esc = 0;
1867                 } else {
1868                         switch(ascii) {
1869                         case '[':
1870                                 term.esc |= ESC_CSI;
1871                                 break;
1872                         case 'P': /* DCS -- Device Control String */
1873                         case '_': /* APC -- Application Program Command */
1874                         case '^': /* PM -- Privacy Message */
1875                         case ']': /* OSC -- Operating System Command */
1876                         case 'k': /* old title set compatibility */
1877                                 strreset();
1878                                 strescseq.type = ascii;
1879                                 term.esc |= ESC_STR;
1880                                 break;
1881                         case '(': /* set primary charset G0 */
1882                                 term.esc |= ESC_ALTCHARSET;
1883                                 break;
1884                         case ')': /* set secondary charset G1 (IGNORED) */
1885                         case '*': /* set tertiary charset G2 (IGNORED) */
1886                         case '+': /* set quaternary charset G3 (IGNORED) */
1887                                 term.esc = 0;
1888                                 break;
1889                         case 'D': /* IND -- Linefeed */
1890                                 if(term.c.y == term.bot) {
1891                                         tscrollup(term.top, 1);
1892                                 } else {
1893                                         tmoveto(term.c.x, term.c.y+1);
1894                                 }
1895                                 term.esc = 0;
1896                                 break;
1897                         case 'E': /* NEL -- Next line */
1898                                 tnewline(1); /* always go to first col */
1899                                 term.esc = 0;
1900                                 break;
1901                         case 'H': /* HTS -- Horizontal tab stop */
1902                                 term.tabs[term.c.x] = 1;
1903                                 term.esc = 0;
1904                                 break;
1905                         case 'M': /* RI -- Reverse index */
1906                                 if(term.c.y == term.top) {
1907                                         tscrolldown(term.top, 1);
1908                                 } else {
1909                                         tmoveto(term.c.x, term.c.y-1);
1910                                 }
1911                                 term.esc = 0;
1912                                 break;
1913                         case 'c': /* RIS -- Reset to inital state */
1914                                 treset();
1915                                 term.esc = 0;
1916                                 xresettitle();
1917                                 break;
1918                         case '=': /* DECPAM -- Application keypad */
1919                                 term.mode |= MODE_APPKEYPAD;
1920                                 term.esc = 0;
1921                                 break;
1922                         case '>': /* DECPNM -- Normal keypad */
1923                                 term.mode &= ~MODE_APPKEYPAD;
1924                                 term.esc = 0;
1925                                 break;
1926                         case '7': /* DECSC -- Save Cursor */
1927                                 tcursor(CURSOR_SAVE);
1928                                 term.esc = 0;
1929                                 break;
1930                         case '8': /* DECRC -- Restore Cursor */
1931                                 tcursor(CURSOR_LOAD);
1932                                 term.esc = 0;
1933                                 break;
1934                         case '\\': /* ST -- Stop */
1935                                 term.esc = 0;
1936                                 break;
1937                         default:
1938                                 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
1939                                         (uchar) ascii, isprint(ascii)? ascii:'.');
1940                                 term.esc = 0;
1941                         }
1942                 }
1943         } else {
1944                 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
1945                         sel.bx = -1;
1946                 if(ascii >= '\020' || term.c.attr.mode & ATTR_GFX) {
1947                         if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1948                                 tnewline(1); /* always go to first col */
1949                         tsetchar(c);
1950                         if(term.c.x+1 < term.col) {
1951                                 tmoveto(term.c.x+1, term.c.y);
1952                         } else {
1953                                 term.c.state |= CURSOR_WRAPNEXT;
1954                         }
1955                 }
1956         }
1957 }
1958
1959 int
1960 tresize(int col, int row) {
1961         int i, x;
1962         int minrow = MIN(row, term.row);
1963         int mincol = MIN(col, term.col);
1964         int slide = term.c.y - row + 1;
1965         bool *bp;
1966
1967         if(col < 1 || row < 1)
1968                 return 0;
1969
1970         /* free unneeded rows */
1971         i = 0;
1972         if(slide > 0) {
1973                 /* slide screen to keep cursor where we expect it -
1974                  * tscrollup would work here, but we can optimize to
1975                  * memmove because we're freeing the earlier lines */
1976                 for(/* i = 0 */; i < slide; i++) {
1977                         free(term.line[i]);
1978                         free(term.alt[i]);
1979                 }
1980                 memmove(term.line, term.line + slide, row * sizeof(Line));
1981                 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1982         }
1983         for(i += row; i < term.row; i++) {
1984                 free(term.line[i]);
1985                 free(term.alt[i]);
1986         }
1987
1988         /* resize to new height */
1989         term.line = xrealloc(term.line, row * sizeof(Line));
1990         term.alt  = xrealloc(term.alt,  row * sizeof(Line));
1991         term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
1992         term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
1993
1994         /* resize each row to new width, zero-pad if needed */
1995         for(i = 0; i < minrow; i++) {
1996                 term.dirty[i] = 1;
1997                 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
1998                 term.alt[i]  = xrealloc(term.alt[i],  col * sizeof(Glyph));
1999                 for(x = mincol; x < col; x++) {
2000                         term.line[i][x].state = 0;
2001                         term.alt[i][x].state = 0;
2002                 }
2003         }
2004
2005         /* allocate any new rows */
2006         for(/* i == minrow */; i < row; i++) {
2007                 term.dirty[i] = 1;
2008                 term.line[i] = xcalloc(col, sizeof(Glyph));
2009                 term.alt [i] = xcalloc(col, sizeof(Glyph));
2010         }
2011         if(col > term.col) {
2012                 bp = term.tabs + term.col;
2013
2014                 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2015                 while(--bp > term.tabs && !*bp)
2016                         /* nothing */ ;
2017                 for(bp += TAB; bp < term.tabs + col; bp += TAB)
2018                         *bp = 1;
2019         }
2020         /* update terminal size */
2021         term.col = col, term.row = row;
2022         /* make use of the LIMIT in tmoveto */
2023         tmoveto(term.c.x, term.c.y);
2024         /* reset scrolling region */
2025         tsetscroll(0, row-1);
2026
2027         return (slide > 0);
2028 }
2029
2030 void
2031 xresize(int col, int row) {
2032         xw.tw = MAX(1, 2*BORDER + col * xw.cw);
2033         xw.th = MAX(1, 2*BORDER + row * xw.ch);
2034
2035         XftDrawChange(xw.xft_draw, xw.buf);
2036 }
2037
2038 void
2039 xloadcols(void) {
2040         int i, r, g, b;
2041         XRenderColor xft_color = { .alpha = 0 };
2042
2043         /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2044         for(i = 0; i < LEN(colorname); i++) {
2045                 if(!colorname[i])
2046                         continue;
2047                 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.xft_col[i])) {
2048                         die("Could not allocate color '%s'\n", colorname[i]);
2049                 }
2050         }
2051
2052         /* load colors [16-255] ; same colors as xterm */
2053         for(i = 16, r = 0; r < 6; r++) {
2054                 for(g = 0; g < 6; g++) {
2055                         for(b = 0; b < 6; b++) {
2056                                 xft_color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
2057                                 xft_color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
2058                                 xft_color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
2059                                 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &xft_color, &dc.xft_col[i])) {
2060                                         die("Could not allocate color %d\n", i);
2061                                 }
2062                                 i++;
2063                         }
2064                 }
2065         }
2066
2067         for(r = 0; r < 24; r++, i++) {
2068                 xft_color.red = xft_color.green = xft_color.blue = 0x0808 + 0x0a0a * r;
2069                 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &xft_color,
2070                                         &dc.xft_col[i])) {
2071                         die("Could not allocate color %d\n", i);
2072                 }
2073         }
2074 }
2075
2076 void
2077 xtermclear(int col1, int row1, int col2, int row2) {
2078         XftDrawRect(xw.xft_draw,
2079                         &dc.xft_col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG],
2080                         BORDER + col1 * xw.cw,
2081                         BORDER + row1 * xw.ch,
2082                         (col2-col1+1) * xw.cw,
2083                         (row2-row1+1) * xw.ch);
2084 }
2085
2086 /*
2087  * Absolute coordinates.
2088  */
2089 void
2090 xclear(int x1, int y1, int x2, int y2) {
2091         XftDrawRect(xw.xft_draw,
2092                         &dc.xft_col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG],
2093                         x1, y1, x2-x1, y2-y1);
2094 }
2095
2096 void
2097 xhints(void) {
2098         XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
2099         XWMHints wm = {.flags = InputHint, .input = 1};
2100         XSizeHints *sizeh = NULL;
2101
2102         sizeh = XAllocSizeHints();
2103         if(xw.isfixed == False) {
2104                 sizeh->flags = PSize | PResizeInc | PBaseSize;
2105                 sizeh->height = xw.h;
2106                 sizeh->width = xw.w;
2107                 sizeh->height_inc = xw.ch;
2108                 sizeh->width_inc = xw.cw;
2109                 sizeh->base_height = 2*BORDER;
2110                 sizeh->base_width = 2*BORDER;
2111         } else {
2112                 sizeh->flags = PMaxSize | PMinSize;
2113                 sizeh->min_width = sizeh->max_width = xw.fw;
2114                 sizeh->min_height = sizeh->max_height = xw.fh;
2115         }
2116
2117         XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2118         XFree(sizeh);
2119 }
2120
2121 void
2122 xinitfont(Font *f, char *fontstr) {
2123         FcPattern *pattern, *match;
2124         FcResult result;
2125
2126         pattern = FcNameParse((FcChar8 *)fontstr);
2127         if(!pattern)
2128                 die("st: can't open font %s\n", fontstr);
2129
2130         match = XftFontMatch(xw.dpy, xw.scr, pattern, &result);
2131         FcPatternDestroy(pattern);
2132         if(!match)
2133                 die("st: can't open font %s\n", fontstr);
2134         if(!(f->xft_set = XftFontOpenPattern(xw.dpy, match))) {
2135                 FcPatternDestroy(match);
2136                 die("st: can't open font %s.\n", fontstr);
2137         }
2138
2139         f->ascent = f->xft_set->ascent;
2140         f->descent = f->xft_set->descent;
2141         f->lbearing = 0;
2142         f->rbearing = f->xft_set->max_advance_width;
2143
2144         f->height = f->xft_set->height;
2145         f->width = f->lbearing + f->rbearing;
2146 }
2147
2148 void
2149 initfonts(char *fontstr) {
2150         char *fstr;
2151
2152         xinitfont(&dc.font, fontstr);
2153         xw.cw = dc.font.width;
2154         xw.ch = dc.font.height;
2155
2156         fstr = smstrcat(fontstr, ":weight=bold", NULL);
2157         xinitfont(&dc.bfont, fstr);
2158         free(fstr);
2159
2160         fstr = smstrcat(fontstr, ":slant=italic,oblique", NULL);
2161         xinitfont(&dc.ifont, fstr);
2162         free(fstr);
2163
2164         fstr = smstrcat(fontstr, ":weight=bold:slant=italic,oblique", NULL);
2165         xinitfont(&dc.ibfont, fstr);
2166         free(fstr);
2167 }
2168
2169 void
2170 xinit(void) {
2171         XSetWindowAttributes attrs;
2172         Cursor cursor;
2173         Window parent;
2174         int sw, sh, major, minor;
2175
2176         if(!(xw.dpy = XOpenDisplay(NULL)))
2177                 die("Can't open display\n");
2178         xw.scr = XDefaultScreen(xw.dpy);
2179         xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2180
2181         /* font */
2182         initfonts((opt_font != NULL)? opt_font : FONT);
2183
2184         /* colors */
2185         xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2186         xloadcols();
2187
2188         /* adjust fixed window geometry */
2189         if(xw.isfixed) {
2190                 sw = DisplayWidth(xw.dpy, xw.scr);
2191                 sh = DisplayHeight(xw.dpy, xw.scr);
2192                 if(xw.fx < 0)
2193                         xw.fx = sw + xw.fx - xw.fw - 1;
2194                 if(xw.fy < 0)
2195                         xw.fy = sh + xw.fy - xw.fh - 1;
2196
2197                 xw.h = xw.fh;
2198                 xw.w = xw.fw;
2199         } else {
2200                 /* window - default size */
2201                 xw.h = 2*BORDER + term.row * xw.ch;
2202                 xw.w = 2*BORDER + term.col * xw.cw;
2203                 xw.fx = 0;
2204                 xw.fy = 0;
2205         }
2206
2207         attrs.background_pixel = dc.xft_col[DefaultBG].pixel;
2208         attrs.border_pixel = dc.xft_col[DefaultBG].pixel;
2209         attrs.bit_gravity = NorthWestGravity;
2210         attrs.event_mask = FocusChangeMask | KeyPressMask
2211                 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2212                 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2213         attrs.colormap = xw.cmap;
2214
2215         parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
2216         xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2217                         xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2218                         xw.vis,
2219                         CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2220                         | CWColormap,
2221                         &attrs);
2222
2223         /* double buffering */
2224         if(!XdbeQueryExtension(xw.dpy, &major, &minor))
2225                 die("Xdbe extension is not present\n");
2226         xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
2227
2228         /* Xft rendering context */
2229         xw.xft_draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2230
2231         /* input methods */
2232         xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
2233         xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2234                                            | XIMStatusNothing, XNClientWindow, xw.win,
2235                                            XNFocusWindow, xw.win, NULL);
2236         /* gc */
2237         dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
2238
2239         /* white cursor, black outline */
2240         cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2241         XDefineCursor(xw.dpy, xw.win, cursor);
2242         XRecolorCursor(xw.dpy, cursor,
2243                 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2244                 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2245
2246         xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2247         xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2248         XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2249
2250         xresettitle();
2251         XMapWindow(xw.dpy, xw.win);
2252         xhints();
2253         XSync(xw.dpy, 0);
2254 }
2255
2256 void
2257 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2258         int winx = BORDER + x * xw.cw, winy = BORDER + y * xw.ch,
2259             width = charlen * xw.cw;
2260         Font *font = &dc.font;
2261         XGlyphInfo extents;
2262         XftColor *fg = &dc.xft_col[base.fg], *bg = &dc.xft_col[base.bg],
2263                  *temp, revfg, revbg;
2264         XRenderColor colfg, colbg;
2265
2266         if(base.mode & ATTR_REVERSE)
2267                 temp = fg, fg = bg, bg = temp;
2268
2269         if(base.mode & ATTR_BOLD) {
2270                 if(BETWEEN(base.fg, 0, 7)) {
2271                         /* basic system colors */
2272                         fg = &dc.xft_col[base.fg + 8];
2273                 } else if(BETWEEN(base.fg, 16, 195)) {
2274                         /* 256 colors */
2275                         fg = &dc.xft_col[base.fg + 36];
2276                 } else if(BETWEEN(base.fg, 232, 251)) {
2277                         /* greyscale */
2278                         fg = &dc.xft_col[base.fg + 4];
2279                 }
2280                 /*
2281                  * Those ranges will not be brightened:
2282                  *      8 - 15 – bright system colors
2283                  *      196 - 231 – highest 256 color cube
2284                  *      252 - 255 – brightest colors in grescale
2285                  */
2286                 font = &dc.bfont;
2287         }
2288
2289         if(base.mode & ATTR_ITALIC)
2290                 font = &dc.ifont;
2291         if(base.mode & (ATTR_ITALIC|ATTR_ITALIC))
2292                 font = &dc.ibfont;
2293
2294         if(IS_SET(MODE_REVERSE)) {
2295                 if(fg == &dc.xft_col[DefaultFG]) {
2296                         fg = &dc.xft_col[DefaultBG];
2297                 } else {
2298                         colfg.red = ~fg->color.red;
2299                         colfg.green = ~fg->color.green;
2300                         colfg.blue = ~fg->color.blue;
2301                         colfg.alpha = fg->color.alpha;
2302                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2303                         fg = &revfg;
2304                 }
2305
2306                 if(bg == &dc.xft_col[DefaultBG]) {
2307                         bg = &dc.xft_col[DefaultFG];
2308                 } else {
2309                         colbg.red = ~bg->color.red;
2310                         colbg.green = ~bg->color.green;
2311                         colbg.blue = ~bg->color.blue;
2312                         colbg.alpha = bg->color.alpha;
2313                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2314                         bg = &revbg;
2315                 }
2316         }
2317
2318         XftTextExtentsUtf8(xw.dpy, font->xft_set, (FcChar8 *)s, bytelen,
2319                         &extents);
2320         width = extents.xOff;
2321
2322         /* Intelligent cleaning up of the borders. */
2323         if(x == 0) {
2324                 xclear(0, (y == 0)? 0 : winy, BORDER,
2325                         winy + xw.ch + (y == term.row-1)? xw.h : 0);
2326         }
2327         if(x + charlen >= term.col-1) {
2328                 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2329                         winy + xw.ch + (y == term.row-1)? xw.h : 0);
2330         }
2331         if(y == 0)
2332                 xclear(winx, 0, winx + width, BORDER);
2333         if(y == term.row-1)
2334                 xclear(winx, winy + xw.ch, winx + width, xw.h);
2335
2336         XftDrawRect(xw.xft_draw, bg, winx, winy, width, xw.ch);
2337         XftDrawStringUtf8(xw.xft_draw, fg, font->xft_set, winx,
2338                         winy + font->ascent, (FcChar8 *)s, bytelen);
2339
2340         if(base.mode & ATTR_UNDERLINE) {
2341                 XftDrawRect(xw.xft_draw, fg, winx, winy + font->ascent + 1,
2342                                 width, 1);
2343         }
2344 }
2345
2346 void
2347 xdrawcursor(void) {
2348         static int oldx = 0, oldy = 0;
2349         int sl;
2350         Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
2351
2352         LIMIT(oldx, 0, term.col-1);
2353         LIMIT(oldy, 0, term.row-1);
2354
2355         if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2356                 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2357
2358         /* remove the old cursor */
2359         if(term.line[oldy][oldx].state & GLYPH_SET) {
2360                 sl = utf8size(term.line[oldy][oldx].c);
2361                 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2362                                 oldy, 1, sl);
2363         } else {
2364                 xtermclear(oldx, oldy, oldx, oldy);
2365         }
2366
2367         /* draw the new one */
2368         if(!(term.c.state & CURSOR_HIDE)) {
2369                 if(!(xw.state & WIN_FOCUSED))
2370                         g.bg = DefaultUCS;
2371
2372                 if(IS_SET(MODE_REVERSE))
2373                         g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
2374
2375                 sl = utf8size(g.c);
2376                 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2377                 oldx = term.c.x, oldy = term.c.y;
2378         }
2379 }
2380
2381 void
2382 xresettitle(void) {
2383         XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
2384 }
2385
2386 void
2387 redraw(void) {
2388         struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
2389
2390         tfulldirt();
2391         draw();
2392         XSync(xw.dpy, False); /* necessary for a good tput flash */
2393         nanosleep(&tv, NULL);
2394 }
2395
2396 void
2397 draw(void) {
2398         XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2399
2400         drawregion(0, 0, term.col, term.row);
2401         XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2402 }
2403
2404 void
2405 drawregion(int x1, int y1, int x2, int y2) {
2406         int ic, ib, x, y, ox, sl;
2407         Glyph base, new;
2408         char buf[DRAW_BUF_SIZ];
2409         bool ena_sel = sel.bx != -1, alt = IS_SET(MODE_ALTSCREEN);
2410
2411         if((sel.alt && !alt) || (!sel.alt && alt))
2412                 ena_sel = 0;
2413         if(!(xw.state & WIN_VISIBLE))
2414                 return;
2415
2416         for(y = y1; y < y2; y++) {
2417                 if(!term.dirty[y])
2418                         continue;
2419
2420                 xtermclear(0, y, term.col, y);
2421                 term.dirty[y] = 0;
2422                 base = term.line[y][0];
2423                 ic = ib = ox = 0;
2424                 for(x = x1; x < x2; x++) {
2425                         new = term.line[y][x];
2426                         if(ena_sel && *(new.c) && selected(x, y))
2427                                 new.mode ^= ATTR_REVERSE;
2428                         if(ib > 0 && (!(new.state & GLYPH_SET)
2429                                         || ATTRCMP(base, new)
2430                                         || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2431                                 xdraws(buf, base, ox, y, ic, ib);
2432                                 ic = ib = 0;
2433                         }
2434                         if(new.state & GLYPH_SET) {
2435                                 if(ib == 0) {
2436                                         ox = x;
2437                                         base = new;
2438                                 }
2439                                 sl = utf8size(new.c);
2440                                 memcpy(buf+ib, new.c, sl);
2441                                 ib += sl;
2442                                 ++ic;
2443                         }
2444                 }
2445                 if(ib > 0)
2446                         xdraws(buf, base, ox, y, ic, ib);
2447         }
2448         xdrawcursor();
2449 }
2450
2451 void
2452 expose(XEvent *ev) {
2453         XExposeEvent *e = &ev->xexpose;
2454
2455         if(xw.state & WIN_REDRAW) {
2456                 if(!e->count)
2457                         xw.state &= ~WIN_REDRAW;
2458         }
2459 }
2460
2461 void
2462 visibility(XEvent *ev) {
2463         XVisibilityEvent *e = &ev->xvisibility;
2464
2465         if(e->state == VisibilityFullyObscured) {
2466                 xw.state &= ~WIN_VISIBLE;
2467         } else if(!(xw.state & WIN_VISIBLE)) {
2468                 /* need a full redraw for next Expose, not just a buf copy */
2469                 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2470         }
2471 }
2472
2473 void
2474 unmap(XEvent *ev) {
2475         xw.state &= ~WIN_VISIBLE;
2476 }
2477
2478 void
2479 xseturgency(int add) {
2480         XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2481
2482         h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2483         XSetWMHints(xw.dpy, xw.win, h);
2484         XFree(h);
2485 }
2486
2487 void
2488 focus(XEvent *ev) {
2489         if(ev->type == FocusIn) {
2490                 xw.state |= WIN_FOCUSED;
2491                 xseturgency(0);
2492         } else {
2493                 xw.state &= ~WIN_FOCUSED;
2494         }
2495 }
2496
2497 char*
2498 kmap(KeySym k, uint state) {
2499         int i;
2500         uint mask;
2501
2502         state &= ~Mod2Mask;
2503         for(i = 0; i < LEN(key); i++) {
2504                 mask = key[i].mask;
2505
2506                 if(key[i].k == k && ((state & mask) == mask
2507                                 || (mask == XK_NO_MOD && !state))) {
2508                         return (char*)key[i].s;
2509                 }
2510         }
2511         return NULL;
2512 }
2513
2514 void
2515 kpress(XEvent *ev) {
2516         XKeyEvent *e = &ev->xkey;
2517         KeySym ksym;
2518         char buf[32];
2519         char *customkey;
2520         int len;
2521         int meta;
2522         int shift;
2523         Status status;
2524
2525         if (IS_SET(MODE_KBDLOCK))
2526                 return;
2527
2528         meta = e->state & Mod1Mask;
2529         shift = e->state & ShiftMask;
2530         len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
2531
2532         /* 1. custom keys from config.h */
2533         if((customkey = kmap(ksym, e->state))) {
2534                 ttywrite(customkey, strlen(customkey));
2535         /* 2. hardcoded (overrides X lookup) */
2536         } else {
2537                 switch(ksym) {
2538                 case XK_Up:
2539                 case XK_Down:
2540                 case XK_Left:
2541                 case XK_Right:
2542                         /* XXX: shift up/down doesn't work */
2543                         sprintf(buf, "\033%c%c",
2544                                 IS_SET(MODE_APPKEYPAD) ? 'O' : '[',
2545                                 (shift ? "dacb":"DACB")[ksym - XK_Left]);
2546                         ttywrite(buf, 3);
2547                         break;
2548                 case XK_Insert:
2549                         if(shift)
2550                                 selpaste();
2551                         break;
2552                 case XK_Return:
2553                         if(IS_SET(MODE_CRLF)) {
2554                                 ttywrite("\r\n", 2);
2555                         } else {
2556                                 ttywrite("\r", 1);
2557                         }
2558                         break;
2559                         /* 3. X lookup  */
2560                 default:
2561                         if(len > 0) {
2562                                 if(meta && len == 1)
2563                                         ttywrite("\033", 1);
2564                                 ttywrite(buf, len);
2565                         }
2566                         break;
2567                 }
2568         }
2569 }
2570
2571 void
2572 cmessage(XEvent *e) {
2573         /* See xembed specs
2574            http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2575         if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2576                 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2577                         xw.state |= WIN_FOCUSED;
2578                         xseturgency(0);
2579                 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2580                         xw.state &= ~WIN_FOCUSED;
2581                 }
2582         } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
2583                 /* Send SIGHUP to shell */
2584                 kill(pid, SIGHUP);
2585                 exit(EXIT_SUCCESS);
2586         }
2587 }
2588
2589 void
2590 resize(XEvent *e) {
2591         int col, row;
2592
2593         if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2594                 return;
2595
2596         xw.w = e->xconfigure.width;
2597         xw.h = e->xconfigure.height;
2598         col = (xw.w - 2*BORDER) / xw.cw;
2599         row = (xw.h - 2*BORDER) / xw.ch;
2600         if(col == term.col && row == term.row)
2601                 return;
2602
2603         tresize(col, row);
2604         xresize(col, row);
2605         ttyresize();
2606 }
2607
2608 void
2609 run(void) {
2610         XEvent ev;
2611         fd_set rfd;
2612         int xfd = XConnectionNumber(xw.dpy), i;
2613         struct timeval drawtimeout, *tv = NULL;
2614
2615         for(i = 0;; i++) {
2616                 FD_ZERO(&rfd);
2617                 FD_SET(cmdfd, &rfd);
2618                 FD_SET(xfd, &rfd);
2619                 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
2620                         if(errno == EINTR)
2621                                 continue;
2622                         die("select failed: %s\n", SERRNO);
2623                 }
2624
2625                 /*
2626                  * Stop after a certain number of reads so the user does not
2627                  * feel like the system is stuttering.
2628                  */
2629                 if(i < 1000 && FD_ISSET(cmdfd, &rfd)) {
2630                         ttyread();
2631
2632                         /*
2633                          * Just wait a bit so it isn't disturbing the
2634                          * user and the system is able to write something.
2635                          */
2636                         drawtimeout.tv_sec = 0;
2637                         drawtimeout.tv_usec = 5;
2638                         tv = &drawtimeout;
2639                         continue;
2640                 }
2641                 i = 0;
2642                 tv = NULL;
2643
2644                 while(XPending(xw.dpy)) {
2645                         XNextEvent(xw.dpy, &ev);
2646                         if(XFilterEvent(&ev, xw.win))
2647                                 continue;
2648                         if(handler[ev.type])
2649                                 (handler[ev.type])(&ev);
2650                 }
2651
2652                 draw();
2653                 XFlush(xw.dpy);
2654         }
2655 }
2656
2657 int
2658 main(int argc, char *argv[]) {
2659         int i, bitm, xr, yr;
2660         uint wr, hr;
2661
2662         xw.fw = xw.fh = xw.fx = xw.fy = 0;
2663         xw.isfixed = False;
2664
2665         for(i = 1; i < argc; i++) {
2666                 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2667                 case 'c':
2668                         if(++i < argc)
2669                                 opt_class = argv[i];
2670                         break;
2671                 case 'e':
2672                         /* eat every remaining arguments */
2673                         if(++i < argc)
2674                                 opt_cmd = &argv[i];
2675                         goto run;
2676                 case 'f':
2677                         if(++i < argc)
2678                                 opt_font = argv[i];
2679                         break;
2680                 case 'g':
2681                         if(++i >= argc)
2682                                 break;
2683
2684                         bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
2685                         if(bitm & XValue)
2686                                 xw.fx = xr;
2687                         if(bitm & YValue)
2688                                 xw.fy = yr;
2689                         if(bitm & WidthValue)
2690                                 xw.fw = (int)wr;
2691                         if(bitm & HeightValue)
2692                                 xw.fh = (int)hr;
2693                         if(bitm & XNegative && xw.fx == 0)
2694                                 xw.fx = -1;
2695                         if(bitm & XNegative && xw.fy == 0)
2696                                 xw.fy = -1;
2697
2698                         if(xw.fh != 0 && xw.fw != 0)
2699                                 xw.isfixed = True;
2700                         break;
2701                 case 'o':
2702                         if(++i < argc)
2703                                 opt_io = argv[i];
2704                         break;
2705                 case 't':
2706                         if(++i < argc)
2707                                 opt_title = argv[i];
2708                         break;
2709                 case 'v':
2710                 default:
2711                         die(USAGE);
2712                 case 'w':
2713                         if(++i < argc)
2714                                 opt_embed = argv[i];
2715                         break;
2716                 }
2717         }
2718
2719 run:
2720         setlocale(LC_CTYPE, "");
2721         tnew(80, 24);
2722         ttynew();
2723         xinit();
2724         selinit();
2725         run();
2726         return 0;
2727 }
2728