x.c

   1 /* See LICENSE for license details. */
   2 #include <errno.h>
   3 #include <math.h>
   4 #include <limits.h>
   5 #include <locale.h>
   6 #include <signal.h>
   7 #include <sys/select.h>
   8 #include <time.h>
   9 #include <unistd.h>
  10 #include <libgen.h>
  11 #include <X11/Xatom.h>
  12 #include <X11/Xlib.h>
  13 #include <X11/cursorfont.h>
  14 #include <X11/keysym.h>
  15 #include <X11/Xft/Xft.h>
  16 #include <X11/XKBlib.h>
  17
  18 char *argv0;
  19 #include "arg.h"
  20 #include "st.h"
  21 #include "win.h"
  22
  23 /* types used in config.h */
  24 typedef struct {
  25         uint mod;
  26         KeySym keysym;
  27         void (*func)(const Arg *);
  28         const Arg arg;
  29 } Shortcut;
  30
  31 typedef struct {
  32         uint mod;
  33         uint button;
  34         void (*func)(const Arg *);
  35         const Arg arg;
  36         uint  release;
  37 } MouseShortcut;
  38
  39 typedef struct {
  40         KeySym k;
  41         uint mask;
  42         char *s;
  43         /* three-valued logic variables: 0 indifferent, 1 on, -1 off */
  44         signed char appkey;    /* application keypad */
  45         signed char appcursor; /* application cursor */
  46 } Key;
  47
  48 /* X modifiers */
  49 #define XK_ANY_MOD    UINT_MAX
  50 #define XK_NO_MOD     0
  51 #define XK_SWITCH_MOD (1<<13)
  52
  53 /* function definitions used in config.h */
  54 static void clipcopy(const Arg *);
  55 static void clippaste(const Arg *);
  56 static void numlock(const Arg *);
  57 static void selpaste(const Arg *);
  58 static void zoom(const Arg *);
  59 static void zoomabs(const Arg *);
  60 static void zoomreset(const Arg *);
  61 static void ttysend(const Arg *);
  62
  63 /* config.h for applying patches and the configuration. */
  64 #include "config.h"
  65
  66 /* XEMBED messages */
  67 #define XEMBED_FOCUS_IN  4
  68 #define XEMBED_FOCUS_OUT 5
  69
  70 /* macros */
  71 #define IS_SET(flag)            ((win.mode & (flag)) != 0)
  72 #define TRUERED(x)              (((x) & 0xff0000) >> 8)
  73 #define TRUEGREEN(x)            (((x) & 0xff00))
  74 #define TRUEBLUE(x)             (((x) & 0xff) << 8)
  75
  76 typedef XftDraw *Draw;
  77 typedef XftColor Color;
  78 typedef XftGlyphFontSpec GlyphFontSpec;
  79
  80 /* Purely graphic info */
  81 typedef struct {
  82         int tw, th; /* tty width and height */
  83         int w, h; /* window width and height */
  84         int ch; /* char height */
  85         int cw; /* char width  */
  86         int mode; /* window state/mode flags */
  87         int cursor; /* cursor style */
  88 } TermWindow;
  89
  90 typedef struct {
  91         Display *dpy;
  92         Colormap cmap;
  93         Window win;
  94         Drawable buf;
  95         GlyphFontSpec *specbuf; /* font spec buffer used for rendering */
  96         Atom xembed, wmdeletewin, netwmname, netwmpid;
  97         struct {
  98                 XIM xim;
  99                 XIC xic;
 100                 XPoint spot;
 101                 XVaNestedList spotlist;
 102         } ime;
 103         Draw draw;
 104         Visual *vis;
 105         XSetWindowAttributes attrs;
 106         int scr;
 107         int isfixed; /* is fixed geometry? */
 108         int l, t; /* left and top offset */
 109         int gm; /* geometry mask */
 110 } XWindow;
 111
 112 typedef struct {
 113         Atom xtarget;
 114         char *primary, *clipboard;
 115         struct timespec tclick1;
 116         struct timespec tclick2;
 117 } XSelection;
 118
 119 /* Font structure */
 120 #define Font Font_
 121 typedef struct {
 122         int height;
 123         int width;
 124         int ascent;
 125         int descent;
 126         int badslant;
 127         int badweight;
 128         short lbearing;
 129         short rbearing;
 130         XftFont *match;
 131         FcFontSet *set;
 132         FcPattern *pattern;
 133 } Font;
 134
 135 /* Drawing Context */
 136 typedef struct {
 137         Color *col;
 138         size_t collen;
 139         Font font, bfont, ifont, ibfont;
 140         GC gc;
 141 } DC;
 142
 143 static inline ushort sixd_to_16bit(int);
 144 static int xmakeglyphfontspecs(XftGlyphFontSpec *, const Glyph *, int, int, int);
 145 static void xdrawglyphfontspecs(const XftGlyphFontSpec *, Glyph, int, int, int);
 146 static void xdrawglyph(Glyph, int, int);
 147 static void xclear(int, int, int, int);
 148 static int xgeommasktogravity(int);
 149 static int ximopen(Display *);
 150 static void ximinstantiate(Display *, XPointer, XPointer);
 151 static void ximdestroy(XIM, XPointer, XPointer);
 152 static int xicdestroy(XIC, XPointer, XPointer);
 153 static void xinit(int, int);
 154 static void cresize(int, int);
 155 static void xresize(int, int);
 156 static void xhints(void);
 157 static int xloadcolor(int, const char *, Color *);
 158 static int xloadfont(Font *, FcPattern *);
 159 static void xloadfonts(char *, double);
 160 static void xunloadfont(Font *);
 161 static void xunloadfonts(void);
 162 static void xsetenv(void);
 163 static void xseturgency(int);
 164 static int evcol(XEvent *);
 165 static int evrow(XEvent *);
 166
 167 static void expose(XEvent *);
 168 static void visibility(XEvent *);
 169 static void unmap(XEvent *);
 170 static void kpress(XEvent *);
 171 static void cmessage(XEvent *);
 172 static void resize(XEvent *);
 173 static void focus(XEvent *);
 174 static uint buttonmask(uint);
 175 static int mouseaction(XEvent *, uint);
 176 static void brelease(XEvent *);
 177 static void bpress(XEvent *);
 178 static void bmotion(XEvent *);
 179 static void propnotify(XEvent *);
 180 static void selnotify(XEvent *);
 181 static void selclear_(XEvent *);
 182 static void selrequest(XEvent *);
 183 static void setsel(char *, Time);
 184 static void mousesel(XEvent *, int);
 185 static void mousereport(XEvent *);
 186 static char *kmap(KeySym, uint);
 187 static int match(uint, uint);
 188
 189 static void run(void);
 190 static void usage(void);
 191
 192 static void (*handler[LASTEvent])(XEvent *) = {
 193         [KeyPress] = kpress,
 194         [ClientMessage] = cmessage,
 195         [ConfigureNotify] = resize,
 196         [VisibilityNotify] = visibility,
 197         [UnmapNotify] = unmap,
 198         [Expose] = expose,
 199         [FocusIn] = focus,
 200         [FocusOut] = focus,
 201         [MotionNotify] = bmotion,
 202         [ButtonPress] = bpress,
 203         [ButtonRelease] = brelease,
 204 /*
 205  * Uncomment if you want the selection to disappear when you select something
 206  * different in another window.
 207  */
 208 /*      [SelectionClear] = selclear_, */
 209         [SelectionNotify] = selnotify,
 210 /*
 211  * PropertyNotify is only turned on when there is some INCR transfer happening
 212  * for the selection retrieval.
 213  */
 214         [PropertyNotify] = propnotify,
 215         [SelectionRequest] = selrequest,
 216 };
 217
 218 /* Globals */
 219 static DC dc;
 220 static XWindow xw;
 221 static XSelection xsel;
 222 static TermWindow win;
 223
 224 /* Font Ring Cache */
 225 enum {
 226         FRC_NORMAL,
 227         FRC_ITALIC,
 228         FRC_BOLD,
 229         FRC_ITALICBOLD
 230 };
 231
 232 typedef struct {
 233         XftFont *font;
 234         int flags;
 235         Rune unicodep;
 236 } Fontcache;
 237
 238 /* Fontcache is an array now. A new font will be appended to the array. */
 239 static Fontcache *frc = NULL;
 240 static int frclen = 0;
 241 static int frccap = 0;
 242 static char *usedfont = NULL;
 243 static double usedfontsize = 0;
 244 static double defaultfontsize = 0;
 245
 246 static char *opt_class = NULL;
 247 static char **opt_cmd  = NULL;
 248 static char *opt_embed = NULL;
 249 static char *opt_font  = NULL;
 250 static char *opt_io    = NULL;
 251 static char *opt_line  = NULL;
 252 static char *opt_name  = NULL;
 253 static char *opt_title = NULL;
 254
 255 static int oldbutton = 3; /* button event on startup: 3 = release */
 256
 257 void
 258 clipcopy(const Arg *dummy)
 259 {
 260         Atom clipboard;
 261
 262         free(xsel.clipboard);
 263         xsel.clipboard = NULL;
 264
 265         if (xsel.primary != NULL) {
 266                 xsel.clipboard = xstrdup(xsel.primary);
 267                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 268                 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
 269         }
 270 }
 271
 272 void
 273 clippaste(const Arg *dummy)
 274 {
 275         Atom clipboard;
 276
 277         clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 278         XConvertSelection(xw.dpy, clipboard, xsel.xtarget, clipboard,
 279                         xw.win, CurrentTime);
 280 }
 281
 282 void
 283 selpaste(const Arg *dummy)
 284 {
 285         XConvertSelection(xw.dpy, XA_PRIMARY, xsel.xtarget, XA_PRIMARY,
 286                         xw.win, CurrentTime);
 287 }
 288
 289 void
 290 numlock(const Arg *dummy)
 291 {
 292         win.mode ^= MODE_NUMLOCK;
 293 }
 294
 295 void
 296 zoom(const Arg *arg)
 297 {
 298         Arg larg;
 299
 300         larg.f = usedfontsize + arg->f;
 301         zoomabs(&larg);
 302 }
 303
 304 void
 305 zoomabs(const Arg *arg)
 306 {
 307         xunloadfonts();
 308         xloadfonts(usedfont, arg->f);
 309         cresize(0, 0);
 310         redraw();
 311         xhints();
 312 }
 313
 314 void
 315 zoomreset(const Arg *arg)
 316 {
 317         Arg larg;
 318
 319         if (defaultfontsize > 0) {
 320                 larg.f = defaultfontsize;
 321                 zoomabs(&larg);
 322         }
 323 }
 324
 325 void
 326 ttysend(const Arg *arg)
 327 {
 328         ttywrite(arg->s, strlen(arg->s), 1);
 329 }
 330
 331 int
 332 evcol(XEvent *e)
 333 {
 334         int x = e->xbutton.x - borderpx;
 335         LIMIT(x, 0, win.tw - 1);
 336         return x / win.cw;
 337 }
 338
 339 int
 340 evrow(XEvent *e)
 341 {
 342         int y = e->xbutton.y - borderpx;
 343         LIMIT(y, 0, win.th - 1);
 344         return y / win.ch;
 345 }
 346
 347 void
 348 mousesel(XEvent *e, int done)
 349 {
 350         int type, seltype = SEL_REGULAR;
 351         uint state = e->xbutton.state & ~(Button1Mask | forcemousemod);
 352
 353         for (type = 1; type < LEN(selmasks); ++type) {
 354                 if (match(selmasks[type], state)) {
 355                         seltype = type;
 356                         break;
 357                 }
 358         }
 359         selextend(evcol(e), evrow(e), seltype, done);
 360         if (done)
 361                 setsel(getsel(), e->xbutton.time);
 362 }
 363
 364 void
 365 mousereport(XEvent *e)
 366 {
 367         int len, x = evcol(e), y = evrow(e),
 368             button = e->xbutton.button, state = e->xbutton.state;
 369         char buf[40];
 370         static int ox, oy;
 371
 372         /* from urxvt */
 373         if (e->xbutton.type == MotionNotify) {
 374                 if (x == ox && y == oy)
 375                         return;
 376                 if (!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
 377                         return;
 378                 /* MOUSE_MOTION: no reporting if no button is pressed */
 379                 if (IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
 380                         return;
 381
 382                 button = oldbutton + 32;
 383                 ox = x;
 384                 oy = y;
 385         } else {
 386                 if (!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
 387                         button = 3;
 388                 } else {
 389                         button -= Button1;
 390                         if (button >= 3)
 391                                 button += 64 - 3;
 392                 }
 393                 if (e->xbutton.type == ButtonPress) {
 394                         oldbutton = button;
 395                         ox = x;
 396                         oy = y;
 397                 } else if (e->xbutton.type == ButtonRelease) {
 398                         oldbutton = 3;
 399                         /* MODE_MOUSEX10: no button release reporting */
 400                         if (IS_SET(MODE_MOUSEX10))
 401                                 return;
 402                         if (button == 64 || button == 65)
 403                                 return;
 404                 }
 405         }
 406
 407         if (!IS_SET(MODE_MOUSEX10)) {
 408                 button += ((state & ShiftMask  ) ? 4  : 0)
 409                         + ((state & Mod4Mask   ) ? 8  : 0)
 410                         + ((state & ControlMask) ? 16 : 0);
 411         }
 412
 413         if (IS_SET(MODE_MOUSESGR)) {
 414                 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
 415                                 button, x+1, y+1,
 416                                 e->xbutton.type == ButtonRelease ? 'm' : 'M');
 417         } else if (x < 223 && y < 223) {
 418                 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
 419                                 32+button, 32+x+1, 32+y+1);
 420         } else {
 421                 return;
 422         }
 423
 424         ttywrite(buf, len, 0);
 425 }
 426
 427 uint
 428 buttonmask(uint button)
 429 {
 430         return button == Button1 ? Button1Mask
 431              : button == Button2 ? Button2Mask
 432              : button == Button3 ? Button3Mask
 433              : button == Button4 ? Button4Mask
 434              : button == Button5 ? Button5Mask
 435              : 0;
 436 }
 437
 438 int
 439 mouseaction(XEvent *e, uint release)
 440 {
 441         MouseShortcut *ms;
 442
 443         /* ignore Button<N>mask for Button<N> - it's set on release */
 444         uint state = e->xbutton.state & ~buttonmask(e->xbutton.button);
 445
 446         for (ms = mshortcuts; ms < mshortcuts + LEN(mshortcuts); ms++) {
 447                 if (ms->release == release &&
 448                     ms->button == e->xbutton.button &&
 449                     (match(ms->mod, state) ||  /* exact or forced */
 450                      match(ms->mod, state & ~forcemousemod))) {
 451                         ms->func(&(ms->arg));
 452                         return 1;
 453                 }
 454         }
 455
 456         return 0;
 457 }
 458
 459 void
 460 bpress(XEvent *e)
 461 {
 462         struct timespec now;
 463         int snap;
 464
 465         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forcemousemod)) {
 466                 mousereport(e);
 467                 return;
 468         }
 469
 470         if (mouseaction(e, 0))
 471                 return;
 472
 473         if (e->xbutton.button == Button1) {
 474                 /*
 475                  * If the user clicks below predefined timeouts specific
 476                  * snapping behaviour is exposed.
 477                  */
 478                 clock_gettime(CLOCK_MONOTONIC, &now);
 479                 if (TIMEDIFF(now, xsel.tclick2) <= tripleclicktimeout) {
 480                         snap = SNAP_LINE;
 481                 } else if (TIMEDIFF(now, xsel.tclick1) <= doubleclicktimeout) {
 482                         snap = SNAP_WORD;
 483                 } else {
 484                         snap = 0;
 485                 }
 486                 xsel.tclick2 = xsel.tclick1;
 487                 xsel.tclick1 = now;
 488
 489                 selstart(evcol(e), evrow(e), snap);
 490         }
 491 }
 492
 493 void
 494 propnotify(XEvent *e)
 495 {
 496         XPropertyEvent *xpev;
 497         Atom clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 498
 499         xpev = &e->xproperty;
 500         if (xpev->state == PropertyNewValue &&
 501                         (xpev->atom == XA_PRIMARY ||
 502                          xpev->atom == clipboard)) {
 503                 selnotify(e);
 504         }
 505 }
 506
 507 void
 508 selnotify(XEvent *e)
 509 {
 510         ulong nitems, ofs, rem;
 511         int format;
 512         uchar *data, *last, *repl;
 513         Atom type, incratom, property = None;
 514
 515         incratom = XInternAtom(xw.dpy, "INCR", 0);
 516
 517         ofs = 0;
 518         if (e->type == SelectionNotify)
 519                 property = e->xselection.property;
 520         else if (e->type == PropertyNotify)
 521                 property = e->xproperty.atom;
 522
 523         if (property == None)
 524                 return;
 525
 526         do {
 527                 if (XGetWindowProperty(xw.dpy, xw.win, property, ofs,
 528                                         BUFSIZ/4, False, AnyPropertyType,
 529                                         &type, &format, &nitems, &rem,
 530                                         &data)) {
 531                         fprintf(stderr, "Clipboard allocation failed\n");
 532                         return;
 533                 }
 534
 535                 if (e->type == PropertyNotify && nitems == 0 && rem == 0) {
 536                         /*
 537                          * If there is some PropertyNotify with no data, then
 538                          * this is the signal of the selection owner that all
 539                          * data has been transferred. We won't need to receive
 540                          * PropertyNotify events anymore.
 541                          */
 542                         MODBIT(xw.attrs.event_mask, 0, PropertyChangeMask);
 543                         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
 544                                         &xw.attrs);
 545                 }
 546
 547                 if (type == incratom) {
 548                         /*
 549                          * Activate the PropertyNotify events so we receive
 550                          * when the selection owner does send us the next
 551                          * chunk of data.
 552                          */
 553                         MODBIT(xw.attrs.event_mask, 1, PropertyChangeMask);
 554                         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
 555                                         &xw.attrs);
 556
 557                         /*
 558                          * Deleting the property is the transfer start signal.
 559                          */
 560                         XDeleteProperty(xw.dpy, xw.win, (int)property);
 561                         continue;
 562                 }
 563
 564                 /*
 565                  * As seen in getsel:
 566                  * Line endings are inconsistent in the terminal and GUI world
 567                  * copy and pasting. When receiving some selection data,
 568                  * replace all '\n' with '\r'.
 569                  * FIXME: Fix the computer world.
 570                  */
 571                 repl = data;
 572                 last = data + nitems * format / 8;
 573                 while ((repl = memchr(repl, '\n', last - repl))) {
 574                         *repl++ = '\r';
 575                 }
 576
 577                 if (IS_SET(MODE_BRCKTPASTE) && ofs == 0)
 578                         ttywrite("\033[200~", 6, 0);
 579                 ttywrite((char *)data, nitems * format / 8, 1);
 580                 if (IS_SET(MODE_BRCKTPASTE) && rem == 0)
 581                         ttywrite("\033[201~", 6, 0);
 582                 XFree(data);
 583                 /* number of 32-bit chunks returned */
 584                 ofs += nitems * format / 32;
 585         } while (rem > 0);
 586
 587         /*
 588          * Deleting the property again tells the selection owner to send the
 589          * next data chunk in the property.
 590          */
 591         XDeleteProperty(xw.dpy, xw.win, (int)property);
 592 }
 593
 594 void
 595 xclipcopy(void)
 596 {
 597         clipcopy(NULL);
 598 }
 599
 600 void
 601 selclear_(XEvent *e)
 602 {
 603         selclear();
 604 }
 605
 606 void
 607 selrequest(XEvent *e)
 608 {
 609         XSelectionRequestEvent *xsre;
 610         XSelectionEvent xev;
 611         Atom xa_targets, string, clipboard;
 612         char *seltext;
 613
 614         xsre = (XSelectionRequestEvent *) e;
 615         xev.type = SelectionNotify;
 616         xev.requestor = xsre->requestor;
 617         xev.selection = xsre->selection;
 618         xev.target = xsre->target;
 619         xev.time = xsre->time;
 620         if (xsre->property == None)
 621                 xsre->property = xsre->target;
 622
 623         /* reject */
 624         xev.property = None;
 625
 626         xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
 627         if (xsre->target == xa_targets) {
 628                 /* respond with the supported type */
 629                 string = xsel.xtarget;
 630                 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
 631                                 XA_ATOM, 32, PropModeReplace,
 632                                 (uchar *) &string, 1);
 633                 xev.property = xsre->property;
 634         } else if (xsre->target == xsel.xtarget || xsre->target == XA_STRING) {
 635                 /*
 636                  * xith XA_STRING non ascii characters may be incorrect in the
 637                  * requestor. It is not our problem, use utf8.
 638                  */
 639                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 640                 if (xsre->selection == XA_PRIMARY) {
 641                         seltext = xsel.primary;
 642                 } else if (xsre->selection == clipboard) {
 643                         seltext = xsel.clipboard;
 644                 } else {
 645                         fprintf(stderr,
 646                                 "Unhandled clipboard selection 0x%lx\n",
 647                                 xsre->selection);
 648                         return;
 649                 }
 650                 if (seltext != NULL) {
 651                         XChangeProperty(xsre->display, xsre->requestor,
 652                                         xsre->property, xsre->target,
 653                                         8, PropModeReplace,
 654                                         (uchar *)seltext, strlen(seltext));
 655                         xev.property = xsre->property;
 656                 }
 657         }
 658
 659         /* all done, send a notification to the listener */
 660         if (!XSendEvent(xsre->display, xsre->requestor, 1, 0, (XEvent *) &xev))
 661                 fprintf(stderr, "Error sending SelectionNotify event\n");
 662 }
 663
 664 void
 665 setsel(char *str, Time t)
 666 {
 667         if (!str)
 668                 return;
 669
 670         free(xsel.primary);
 671         xsel.primary = str;
 672
 673         XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
 674         if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
 675                 selclear();
 676 }
 677
 678 void
 679 xsetsel(char *str)
 680 {
 681         setsel(str, CurrentTime);
 682 }
 683
 684 void
 685 brelease(XEvent *e)
 686 {
 687         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forcemousemod)) {
 688                 mousereport(e);
 689                 return;
 690         }
 691
 692         if (mouseaction(e, 1))
 693                 return;
 694         if (e->xbutton.button == Button1)
 695                 mousesel(e, 1);
 696 }
 697
 698 void
 699 bmotion(XEvent *e)
 700 {
 701         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forcemousemod)) {
 702                 mousereport(e);
 703                 return;
 704         }
 705
 706         mousesel(e, 0);
 707 }
 708
 709 void
 710 cresize(int width, int height)
 711 {
 712         int col, row;
 713
 714         if (width != 0)
 715                 win.w = width;
 716         if (height != 0)
 717                 win.h = height;
 718
 719         col = (win.w - 2 * borderpx) / win.cw;
 720         row = (win.h - 2 * borderpx) / win.ch;
 721         col = MAX(1, col);
 722         row = MAX(1, row);
 723
 724         tresize(col, row);
 725         xresize(col, row);
 726         ttyresize(win.tw, win.th);
 727 }
 728
 729 void
 730 xresize(int col, int row)
 731 {
 732         win.tw = col * win.cw;
 733         win.th = row * win.ch;
 734
 735         XFreePixmap(xw.dpy, xw.buf);
 736         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
 737                         DefaultDepth(xw.dpy, xw.scr));
 738         XftDrawChange(xw.draw, xw.buf);
 739         xclear(0, 0, win.w, win.h);
 740
 741         /* resize to new width */
 742         xw.specbuf = xrealloc(xw.specbuf, col * sizeof(GlyphFontSpec));
 743 }
 744
 745 ushort
 746 sixd_to_16bit(int x)
 747 {
 748         return x == 0 ? 0 : 0x3737 + 0x2828 * x;
 749 }
 750
 751 int
 752 xloadcolor(int i, const char *name, Color *ncolor)
 753 {
 754         XRenderColor color = { .alpha = 0xffff };
 755
 756         if (!name) {
 757                 if (BETWEEN(i, 16, 255)) { /* 256 color */
 758                         if (i < 6*6*6+16) { /* same colors as xterm */
 759                                 color.red   = sixd_to_16bit( ((i-16)/36)%6 );
 760                                 color.green = sixd_to_16bit( ((i-16)/6) %6 );
 761                                 color.blue  = sixd_to_16bit( ((i-16)/1) %6 );
 762                         } else { /* greyscale */
 763                                 color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
 764                                 color.green = color.blue = color.red;
 765                         }
 766                         return XftColorAllocValue(xw.dpy, xw.vis,
 767                                                   xw.cmap, &color, ncolor);
 768                 } else
 769                         name = colorname[i];
 770         }
 771
 772         return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
 773 }
 774
 775 void
 776 xloadcols(void)
 777 {
 778         int i;
 779         static int loaded;
 780         Color *cp;
 781
 782         if (loaded) {
 783                 for (cp = dc.col; cp < &dc.col[dc.collen]; ++cp)
 784                         XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
 785         } else {
 786                 dc.collen = MAX(LEN(colorname), 256);
 787                 dc.col = xmalloc(dc.collen * sizeof(Color));
 788         }
 789
 790         for (i = 0; i < dc.collen; i++)
 791                 if (!xloadcolor(i, NULL, &dc.col[i])) {
 792                         if (colorname[i])
 793                                 die("could not allocate color '%s'\n", colorname[i]);
 794                         else
 795                                 die("could not allocate color %d\n", i);
 796                 }
 797         loaded = 1;
 798 }
 799
 800 int
 801 xsetcolorname(int x, const char *name)
 802 {
 803         Color ncolor;
 804
 805         if (!BETWEEN(x, 0, dc.collen))
 806                 return 1;
 807
 808         if (!xloadcolor(x, name, &ncolor))
 809                 return 1;
 810
 811         XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
 812         dc.col[x] = ncolor;
 813
 814         return 0;
 815 }
 816
 817 /*
 818  * Absolute coordinates.
 819  */
 820 void
 821 xclear(int x1, int y1, int x2, int y2)
 822 {
 823         XftDrawRect(xw.draw,
 824                         &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
 825                         x1, y1, x2-x1, y2-y1);
 826 }
 827
 828 void
 829 xhints(void)
 830 {
 831         XClassHint class = {opt_name ? opt_name : termname,
 832                             opt_class ? opt_class : termname};
 833         XWMHints wm = {.flags = InputHint, .input = 1};
 834         XSizeHints *sizeh;
 835
 836         sizeh = XAllocSizeHints();
 837
 838         sizeh->flags = PSize | PResizeInc | PBaseSize | PMinSize;
 839         sizeh->height = win.h;
 840         sizeh->width = win.w;
 841         sizeh->height_inc = win.ch;
 842         sizeh->width_inc = win.cw;
 843         sizeh->base_height = 2 * borderpx;
 844         sizeh->base_width = 2 * borderpx;
 845         sizeh->min_height = win.ch + 2 * borderpx;
 846         sizeh->min_width = win.cw + 2 * borderpx;
 847         if (xw.isfixed) {
 848                 sizeh->flags |= PMaxSize;
 849                 sizeh->min_width = sizeh->max_width = win.w;
 850                 sizeh->min_height = sizeh->max_height = win.h;
 851         }
 852         if (xw.gm & (XValue|YValue)) {
 853                 sizeh->flags |= USPosition | PWinGravity;
 854                 sizeh->x = xw.l;
 855                 sizeh->y = xw.t;
 856                 sizeh->win_gravity = xgeommasktogravity(xw.gm);
 857         }
 858
 859         XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
 860                         &class);
 861         XFree(sizeh);
 862 }
 863
 864 int
 865 xgeommasktogravity(int mask)
 866 {
 867         switch (mask & (XNegative|YNegative)) {
 868         case 0:
 869                 return NorthWestGravity;
 870         case XNegative:
 871                 return NorthEastGravity;
 872         case YNegative:
 873                 return SouthWestGravity;
 874         }
 875
 876         return SouthEastGravity;
 877 }
 878
 879 int
 880 xloadfont(Font *f, FcPattern *pattern)
 881 {
 882         FcPattern *configured;
 883         FcPattern *match;
 884         FcResult result;
 885         XGlyphInfo extents;
 886         int wantattr, haveattr;
 887
 888         /*
 889          * Manually configure instead of calling XftMatchFont
 890          * so that we can use the configured pattern for
 891          * "missing glyph" lookups.
 892          */
 893         configured = FcPatternDuplicate(pattern);
 894         if (!configured)
 895                 return 1;
 896
 897         FcConfigSubstitute(NULL, configured, FcMatchPattern);
 898         XftDefaultSubstitute(xw.dpy, xw.scr, configured);
 899
 900         match = FcFontMatch(NULL, configured, &result);
 901         if (!match) {
 902                 FcPatternDestroy(configured);
 903                 return 1;
 904         }
 905
 906         if (!(f->match = XftFontOpenPattern(xw.dpy, match))) {
 907                 FcPatternDestroy(configured);
 908                 FcPatternDestroy(match);
 909                 return 1;
 910         }
 911
 912         if ((XftPatternGetInteger(pattern, "slant", 0, &wantattr) ==
 913             XftResultMatch)) {
 914                 /*
 915                  * Check if xft was unable to find a font with the appropriate
 916                  * slant but gave us one anyway. Try to mitigate.
 917                  */
 918                 if ((XftPatternGetInteger(f->match->pattern, "slant", 0,
 919                     &haveattr) != XftResultMatch) || haveattr < wantattr) {
 920                         f->badslant = 1;
 921                         fputs("font slant does not match\n", stderr);
 922                 }
 923         }
 924
 925         if ((XftPatternGetInteger(pattern, "weight", 0, &wantattr) ==
 926             XftResultMatch)) {
 927                 if ((XftPatternGetInteger(f->match->pattern, "weight", 0,
 928                     &haveattr) != XftResultMatch) || haveattr != wantattr) {
 929                         f->badweight = 1;
 930                         fputs("font weight does not match\n", stderr);
 931                 }
 932         }
 933
 934         XftTextExtentsUtf8(xw.dpy, f->match,
 935                 (const FcChar8 *) ascii_printable,
 936                 strlen(ascii_printable), &extents);
 937
 938         f->set = NULL;
 939         f->pattern = configured;
 940
 941         f->ascent = f->match->ascent;
 942         f->descent = f->match->descent;
 943         f->lbearing = 0;
 944         f->rbearing = f->match->max_advance_width;
 945
 946         f->height = f->ascent + f->descent;
 947         f->width = DIVCEIL(extents.xOff, strlen(ascii_printable));
 948
 949         return 0;
 950 }
 951
 952 void
 953 xloadfonts(char *fontstr, double fontsize)
 954 {
 955         FcPattern *pattern;
 956         double fontval;
 957
 958         if (fontstr[0] == '-')
 959                 pattern = XftXlfdParse(fontstr, False, False);
 960         else
 961                 pattern = FcNameParse((FcChar8 *)fontstr);
 962
 963         if (!pattern)
 964                 die("can't open font %s\n", fontstr);
 965
 966         if (fontsize > 1) {
 967                 FcPatternDel(pattern, FC_PIXEL_SIZE);
 968                 FcPatternDel(pattern, FC_SIZE);
 969                 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
 970                 usedfontsize = fontsize;
 971         } else {
 972                 if (FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval) ==
 973                                 FcResultMatch) {
 974                         usedfontsize = fontval;
 975                 } else if (FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval) ==
 976                                 FcResultMatch) {
 977                         usedfontsize = -1;
 978                 } else {
 979                         /*
 980                          * Default font size is 12, if none given. This is to
 981                          * have a known usedfontsize value.
 982                          */
 983                         FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
 984                         usedfontsize = 12;
 985                 }
 986                 defaultfontsize = usedfontsize;
 987         }
 988
 989         if (xloadfont(&dc.font, pattern))
 990                 die("can't open font %s\n", fontstr);
 991
 992         if (usedfontsize < 0) {
 993                 FcPatternGetDouble(dc.font.match->pattern,
 994                                    FC_PIXEL_SIZE, 0, &fontval);
 995                 usedfontsize = fontval;
 996                 if (fontsize == 0)
 997                         defaultfontsize = fontval;
 998         }
 999
1000         /* Setting character width and height. */
1001         win.cw = ceilf(dc.font.width * cwscale);
1002         win.ch = ceilf(dc.font.height * chscale);
1003
1004         FcPatternDel(pattern, FC_SLANT);
1005         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
1006         if (xloadfont(&dc.ifont, pattern))
1007                 die("can't open font %s\n", fontstr);
1008
1009         FcPatternDel(pattern, FC_WEIGHT);
1010         FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
1011         if (xloadfont(&dc.ibfont, pattern))
1012                 die("can't open font %s\n", fontstr);
1013
1014         FcPatternDel(pattern, FC_SLANT);
1015         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
1016         if (xloadfont(&dc.bfont, pattern))
1017                 die("can't open font %s\n", fontstr);
1018
1019         FcPatternDestroy(pattern);
1020 }
1021
1022 void
1023 xunloadfont(Font *f)
1024 {
1025         XftFontClose(xw.dpy, f->match);
1026         FcPatternDestroy(f->pattern);
1027         if (f->set)
1028                 FcFontSetDestroy(f->set);
1029 }
1030
1031 void
1032 xunloadfonts(void)
1033 {
1034         /* Free the loaded fonts in the font cache.  */
1035         while (frclen > 0)
1036                 XftFontClose(xw.dpy, frc[--frclen].font);
1037
1038         xunloadfont(&dc.font);
1039         xunloadfont(&dc.bfont);
1040         xunloadfont(&dc.ifont);
1041         xunloadfont(&dc.ibfont);
1042 }
1043
1044 int
1045 ximopen(Display *dpy)
1046 {
1047         XIMCallback imdestroy = { .client_data = NULL, .callback = ximdestroy };
1048         XICCallback icdestroy = { .client_data = NULL, .callback = xicdestroy };
1049
1050         xw.ime.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
1051         if (xw.ime.xim == NULL)
1052                 return 0;
1053
1054         if (XSetIMValues(xw.ime.xim, XNDestroyCallback, &imdestroy, NULL))
1055                 fprintf(stderr, "XSetIMValues: "
1056                                 "Could not set XNDestroyCallback.\n");
1057
1058         xw.ime.spotlist = XVaCreateNestedList(0, XNSpotLocation, &xw.ime.spot,
1059                                               NULL);
1060
1061         if (xw.ime.xic == NULL) {
1062                 xw.ime.xic = XCreateIC(xw.ime.xim, XNInputStyle,
1063                                        XIMPreeditNothing | XIMStatusNothing,
1064                                        XNClientWindow, xw.win,
1065                                        XNDestroyCallback, &icdestroy,
1066                                        NULL);
1067         }
1068         if (xw.ime.xic == NULL)
1069                 fprintf(stderr, "XCreateIC: Could not create input context.\n");
1070
1071         return 1;
1072 }
1073
1074 void
1075 ximinstantiate(Display *dpy, XPointer client, XPointer call)
1076 {
1077         if (ximopen(dpy))
1078                 XUnregisterIMInstantiateCallback(xw.dpy, NULL, NULL, NULL,
1079                                                  ximinstantiate, NULL);
1080 }
1081
1082 void
1083 ximdestroy(XIM xim, XPointer client, XPointer call)
1084 {
1085         xw.ime.xim = NULL;
1086         XRegisterIMInstantiateCallback(xw.dpy, NULL, NULL, NULL,
1087                                        ximinstantiate, NULL);
1088         XFree(xw.ime.spotlist);
1089 }
1090
1091 int
1092 xicdestroy(XIC xim, XPointer client, XPointer call)
1093 {
1094         xw.ime.xic = NULL;
1095         return 1;
1096 }
1097
1098 void
1099 xinit(int cols, int rows)
1100 {
1101         XGCValues gcvalues;
1102         Cursor cursor;
1103         Window parent;
1104         pid_t thispid = getpid();
1105         XColor xmousefg, xmousebg;
1106
1107         if (!(xw.dpy = XOpenDisplay(NULL)))
1108                 die("can't open display\n");
1109         xw.scr = XDefaultScreen(xw.dpy);
1110         xw.vis = XDefaultVisual(xw.dpy, xw.scr);
1111
1112         /* font */
1113         if (!FcInit())
1114                 die("could not init fontconfig.\n");
1115
1116         usedfont = (opt_font == NULL)? font : opt_font;
1117         xloadfonts(usedfont, 0);
1118
1119         /* colors */
1120         xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1121         xloadcols();
1122
1123         /* adjust fixed window geometry */
1124         win.w = 2 * borderpx + cols * win.cw;
1125         win.h = 2 * borderpx + rows * win.ch;
1126         if (xw.gm & XNegative)
1127                 xw.l += DisplayWidth(xw.dpy, xw.scr) - win.w - 2;
1128         if (xw.gm & YNegative)
1129                 xw.t += DisplayHeight(xw.dpy, xw.scr) - win.h - 2;
1130
1131         /* Events */
1132         xw.attrs.background_pixel = dc.col[defaultbg].pixel;
1133         xw.attrs.border_pixel = dc.col[defaultbg].pixel;
1134         xw.attrs.bit_gravity = NorthWestGravity;
1135         xw.attrs.event_mask = FocusChangeMask | KeyPressMask | KeyReleaseMask
1136                 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1137                 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
1138         xw.attrs.colormap = xw.cmap;
1139
1140         if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
1141                 parent = XRootWindow(xw.dpy, xw.scr);
1142         xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
1143                         win.w, win.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
1144                         xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
1145                         | CWEventMask | CWColormap, &xw.attrs);
1146
1147         memset(&gcvalues, 0, sizeof(gcvalues));
1148         gcvalues.graphics_exposures = False;
1149         dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
1150                         &gcvalues);
1151         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
1152                         DefaultDepth(xw.dpy, xw.scr));
1153         XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
1154         XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, win.w, win.h);
1155
1156         /* font spec buffer */
1157         xw.specbuf = xmalloc(cols * sizeof(GlyphFontSpec));
1158
1159         /* Xft rendering context */
1160         xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
1161
1162         /* input methods */
1163         if (!ximopen(xw.dpy)) {
1164                 XRegisterIMInstantiateCallback(xw.dpy, NULL, NULL, NULL,
1165                                                ximinstantiate, NULL);
1166         }
1167
1168         /* white cursor, black outline */
1169         cursor = XCreateFontCursor(xw.dpy, mouseshape);
1170         XDefineCursor(xw.dpy, xw.win, cursor);
1171
1172         if (XParseColor(xw.dpy, xw.cmap, colorname[mousefg], &xmousefg) == 0) {
1173                 xmousefg.red   = 0xffff;
1174                 xmousefg.green = 0xffff;
1175                 xmousefg.blue  = 0xffff;
1176         }
1177
1178         if (XParseColor(xw.dpy, xw.cmap, colorname[mousebg], &xmousebg) == 0) {
1179                 xmousebg.red   = 0x0000;
1180                 xmousebg.green = 0x0000;
1181                 xmousebg.blue  = 0x0000;
1182         }
1183
1184         XRecolorCursor(xw.dpy, cursor, &xmousefg, &xmousebg);
1185
1186         xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
1187         xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
1188         xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
1189         XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
1190
1191         xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
1192         XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
1193                         PropModeReplace, (uchar *)&thispid, 1);
1194
1195         win.mode = MODE_NUMLOCK;
1196         resettitle();
1197         xhints();
1198         XMapWindow(xw.dpy, xw.win);
1199         XSync(xw.dpy, False);
1200
1201         clock_gettime(CLOCK_MONOTONIC, &xsel.tclick1);
1202         clock_gettime(CLOCK_MONOTONIC, &xsel.tclick2);
1203         xsel.primary = NULL;
1204         xsel.clipboard = NULL;
1205         xsel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
1206         if (xsel.xtarget == None)
1207                 xsel.xtarget = XA_STRING;
1208 }
1209
1210 int
1211 xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x, int y)
1212 {
1213         float winx = borderpx + x * win.cw, winy = borderpx + y * win.ch, xp, yp;
1214         ushort mode, prevmode = USHRT_MAX;
1215         Font *font = &dc.font;
1216         int frcflags = FRC_NORMAL;
1217         float runewidth = win.cw;
1218         Rune rune;
1219         FT_UInt glyphidx;
1220         FcResult fcres;
1221         FcPattern *fcpattern, *fontpattern;
1222         FcFontSet *fcsets[] = { NULL };
1223         FcCharSet *fccharset;
1224         int i, f, numspecs = 0;
1225
1226         for (i = 0, xp = winx, yp = winy + font->ascent; i < len; ++i) {
1227                 /* Fetch rune and mode for current glyph. */
1228                 rune = glyphs[i].u;
1229                 mode = glyphs[i].mode;
1230
1231                 /* Skip dummy wide-character spacing. */
1232                 if (mode == ATTR_WDUMMY)
1233                         continue;
1234
1235                 /* Determine font for glyph if different from previous glyph. */
1236                 if (prevmode != mode) {
1237                         prevmode = mode;
1238                         font = &dc.font;
1239                         frcflags = FRC_NORMAL;
1240                         runewidth = win.cw * ((mode & ATTR_WIDE) ? 2.0f : 1.0f);
1241                         if ((mode & ATTR_ITALIC) && (mode & ATTR_BOLD)) {
1242                                 font = &dc.ibfont;
1243                                 frcflags = FRC_ITALICBOLD;
1244                         } else if (mode & ATTR_ITALIC) {
1245                                 font = &dc.ifont;
1246                                 frcflags = FRC_ITALIC;
1247                         } else if (mode & ATTR_BOLD) {
1248                                 font = &dc.bfont;
1249                                 frcflags = FRC_BOLD;
1250                         }
1251                         yp = winy + font->ascent;
1252                 }
1253
1254                 /* Lookup character index with default font. */
1255                 glyphidx = XftCharIndex(xw.dpy, font->match, rune);
1256                 if (glyphidx) {
1257                         specs[numspecs].font = font->match;
1258                         specs[numspecs].glyph = glyphidx;
1259                         specs[numspecs].x = (short)xp;
1260                         specs[numspecs].y = (short)yp;
1261                         xp += runewidth;
1262                         numspecs++;
1263                         continue;
1264                 }
1265
1266                 /* Fallback on font cache, search the font cache for match. */
1267                 for (f = 0; f < frclen; f++) {
1268                         glyphidx = XftCharIndex(xw.dpy, frc[f].font, rune);
1269                         /* Everything correct. */
1270                         if (glyphidx && frc[f].flags == frcflags)
1271                                 break;
1272                         /* We got a default font for a not found glyph. */
1273                         if (!glyphidx && frc[f].flags == frcflags
1274                                         && frc[f].unicodep == rune) {
1275                                 break;
1276                         }
1277                 }
1278
1279                 /* Nothing was found. Use fontconfig to find matching font. */
1280                 if (f >= frclen) {
1281                         if (!font->set)
1282                                 font->set = FcFontSort(0, font->pattern,
1283                                                        1, 0, &fcres);
1284                         fcsets[0] = font->set;
1285
1286                         /*
1287                          * Nothing was found in the cache. Now use
1288                          * some dozen of Fontconfig calls to get the
1289                          * font for one single character.
1290                          *
1291                          * Xft and fontconfig are design failures.
1292                          */
1293                         fcpattern = FcPatternDuplicate(font->pattern);
1294                         fccharset = FcCharSetCreate();
1295
1296                         FcCharSetAddChar(fccharset, rune);
1297                         FcPatternAddCharSet(fcpattern, FC_CHARSET,
1298                                         fccharset);
1299                         FcPatternAddBool(fcpattern, FC_SCALABLE, 1);
1300
1301                         FcConfigSubstitute(0, fcpattern,
1302                                         FcMatchPattern);
1303                         FcDefaultSubstitute(fcpattern);
1304
1305                         fontpattern = FcFontSetMatch(0, fcsets, 1,
1306                                         fcpattern, &fcres);
1307
1308                         /* Allocate memory for the new cache entry. */
1309                         if (frclen >= frccap) {
1310                                 frccap += 16;
1311                                 frc = xrealloc(frc, frccap * sizeof(Fontcache));
1312                         }
1313
1314                         frc[frclen].font = XftFontOpenPattern(xw.dpy,
1315                                         fontpattern);
1316                         if (!frc[frclen].font)
1317                                 die("XftFontOpenPattern failed seeking fallback font: %s\n",
1318                                         strerror(errno));
1319                         frc[frclen].flags = frcflags;
1320                         frc[frclen].unicodep = rune;
1321
1322                         glyphidx = XftCharIndex(xw.dpy, frc[frclen].font, rune);
1323
1324                         f = frclen;
1325                         frclen++;
1326
1327                         FcPatternDestroy(fcpattern);
1328                         FcCharSetDestroy(fccharset);
1329                 }
1330
1331                 specs[numspecs].font = frc[f].font;
1332                 specs[numspecs].glyph = glyphidx;
1333                 specs[numspecs].x = (short)xp;
1334                 specs[numspecs].y = (short)yp;
1335                 xp += runewidth;
1336                 numspecs++;
1337         }
1338
1339         return numspecs;
1340 }
1341
1342 void
1343 xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, int y)
1344 {
1345         int charlen = len * ((base.mode & ATTR_WIDE) ? 2 : 1);
1346         int winx = borderpx + x * win.cw, winy = borderpx + y * win.ch,
1347             width = charlen * win.cw;
1348         Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
1349         XRenderColor colfg, colbg;
1350         XRectangle r;
1351
1352         /* Fallback on color display for attributes not supported by the font */
1353         if (base.mode & ATTR_ITALIC && base.mode & ATTR_BOLD) {
1354                 if (dc.ibfont.badslant || dc.ibfont.badweight)
1355                         base.fg = defaultattr;
1356         } else if ((base.mode & ATTR_ITALIC && dc.ifont.badslant) ||
1357             (base.mode & ATTR_BOLD && dc.bfont.badweight)) {
1358                 base.fg = defaultattr;
1359         }
1360
1361         if (IS_TRUECOL(base.fg)) {
1362                 colfg.alpha = 0xffff;
1363                 colfg.red = TRUERED(base.fg);
1364                 colfg.green = TRUEGREEN(base.fg);
1365                 colfg.blue = TRUEBLUE(base.fg);
1366                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
1367                 fg = &truefg;
1368         } else {
1369                 fg = &dc.col[base.fg];
1370         }
1371
1372         if (IS_TRUECOL(base.bg)) {
1373                 colbg.alpha = 0xffff;
1374                 colbg.green = TRUEGREEN(base.bg);
1375                 colbg.red = TRUERED(base.bg);
1376                 colbg.blue = TRUEBLUE(base.bg);
1377                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
1378                 bg = &truebg;
1379         } else {
1380                 bg = &dc.col[base.bg];
1381         }
1382
1383         /* Change basic system colors [0-7] to bright system colors [8-15] */
1384         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_BOLD && BETWEEN(base.fg, 0, 7))
1385                 fg = &dc.col[base.fg + 8];
1386
1387         if (IS_SET(MODE_REVERSE)) {
1388                 if (fg == &dc.col[defaultfg]) {
1389                         fg = &dc.col[defaultbg];
1390                 } else {
1391                         colfg.red = ~fg->color.red;
1392                         colfg.green = ~fg->color.green;
1393                         colfg.blue = ~fg->color.blue;
1394                         colfg.alpha = fg->color.alpha;
1395                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
1396                                         &revfg);
1397                         fg = &revfg;
1398                 }
1399
1400                 if (bg == &dc.col[defaultbg]) {
1401                         bg = &dc.col[defaultfg];
1402                 } else {
1403                         colbg.red = ~bg->color.red;
1404                         colbg.green = ~bg->color.green;
1405                         colbg.blue = ~bg->color.blue;
1406                         colbg.alpha = bg->color.alpha;
1407                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
1408                                         &revbg);
1409                         bg = &revbg;
1410                 }
1411         }
1412
1413         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_FAINT) {
1414                 colfg.red = fg->color.red / 2;
1415                 colfg.green = fg->color.green / 2;
1416                 colfg.blue = fg->color.blue / 2;
1417                 colfg.alpha = fg->color.alpha;
1418                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
1419                 fg = &revfg;
1420         }
1421
1422         if (base.mode & ATTR_REVERSE) {
1423                 temp = fg;
1424                 fg = bg;
1425                 bg = temp;
1426         }
1427
1428         if (base.mode & ATTR_BLINK && win.mode & MODE_BLINK)
1429                 fg = bg;
1430
1431         if (base.mode & ATTR_INVISIBLE)
1432                 fg = bg;
1433
1434         /* Intelligent cleaning up of the borders. */
1435         if (x == 0) {
1436                 xclear(0, (y == 0)? 0 : winy, borderpx,
1437                         winy + win.ch +
1438                         ((winy + win.ch >= borderpx + win.th)? win.h : 0));
1439         }
1440         if (winx + width >= borderpx + win.tw) {
1441                 xclear(winx + width, (y == 0)? 0 : winy, win.w,
1442                         ((winy + win.ch >= borderpx + win.th)? win.h : (winy + win.ch)));
1443         }
1444         if (y == 0)
1445                 xclear(winx, 0, winx + width, borderpx);
1446         if (winy + win.ch >= borderpx + win.th)
1447                 xclear(winx, winy + win.ch, winx + width, win.h);
1448
1449         /* Clean up the region we want to draw to. */
1450         XftDrawRect(xw.draw, bg, winx, winy, width, win.ch);
1451
1452         /* Set the clip region because Xft is sometimes dirty. */
1453         r.x = 0;
1454         r.y = 0;
1455         r.height = win.ch;
1456         r.width = width;
1457         XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
1458
1459         /* Render the glyphs. */
1460         XftDrawGlyphFontSpec(xw.draw, fg, specs, len);
1461
1462         /* Render underline and strikethrough. */
1463         if (base.mode & ATTR_UNDERLINE) {
1464                 XftDrawRect(xw.draw, fg, winx, winy + dc.font.ascent + 1,
1465                                 width, 1);
1466         }
1467
1468         if (base.mode & ATTR_STRUCK) {
1469                 XftDrawRect(xw.draw, fg, winx, winy + 2 * dc.font.ascent / 3,
1470                                 width, 1);
1471         }
1472
1473         /* Reset clip to none. */
1474         XftDrawSetClip(xw.draw, 0);
1475 }
1476
1477 void
1478 xdrawglyph(Glyph g, int x, int y)
1479 {
1480         int numspecs;
1481         XftGlyphFontSpec spec;
1482
1483         numspecs = xmakeglyphfontspecs(&spec, &g, 1, x, y);
1484         xdrawglyphfontspecs(&spec, g, numspecs, x, y);
1485 }
1486
1487 void
1488 xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og)
1489 {
1490         Color drawcol;
1491
1492         /* remove the old cursor */
1493         if (selected(ox, oy))
1494                 og.mode ^= ATTR_REVERSE;
1495         xdrawglyph(og, ox, oy);
1496
1497         if (IS_SET(MODE_HIDE))
1498                 return;
1499
1500         /*
1501          * Select the right color for the right mode.
1502          */
1503         g.mode &= ATTR_BOLD|ATTR_ITALIC|ATTR_UNDERLINE|ATTR_STRUCK|ATTR_WIDE;
1504
1505         if (IS_SET(MODE_REVERSE)) {
1506                 g.mode |= ATTR_REVERSE;
1507                 g.bg = defaultfg;
1508                 if (selected(cx, cy)) {
1509                         drawcol = dc.col[defaultcs];
1510                         g.fg = defaultrcs;
1511                 } else {
1512                         drawcol = dc.col[defaultrcs];
1513                         g.fg = defaultcs;
1514                 }
1515         } else {
1516                 if (selected(cx, cy)) {
1517                         g.fg = defaultfg;
1518                         g.bg = defaultrcs;
1519                 } else {
1520                         g.fg = defaultbg;
1521                         g.bg = defaultcs;
1522                 }
1523                 drawcol = dc.col[g.bg];
1524         }
1525
1526         /* draw the new one */
1527         if (IS_SET(MODE_FOCUSED)) {
1528                 switch (win.cursor) {
1529                 case 7: /* st extension */
1530                         g.u = 0x2603; /* snowman (U+2603) */
1531                         /* FALLTHROUGH */
1532                 case 0: /* Blinking Block */
1533                 case 1: /* Blinking Block (Default) */
1534                 case 2: /* Steady Block */
1535                         xdrawglyph(g, cx, cy);
1536                         break;
1537                 case 3: /* Blinking Underline */
1538                 case 4: /* Steady Underline */
1539                         XftDrawRect(xw.draw, &drawcol,
1540                                         borderpx + cx * win.cw,
1541                                         borderpx + (cy + 1) * win.ch - \
1542                                                 cursorthickness,
1543                                         win.cw, cursorthickness);
1544                         break;
1545                 case 5: /* Blinking bar */
1546                 case 6: /* Steady bar */
1547                         XftDrawRect(xw.draw, &drawcol,
1548                                         borderpx + cx * win.cw,
1549                                         borderpx + cy * win.ch,
1550                                         cursorthickness, win.ch);
1551                         break;
1552                 }
1553         } else {
1554                 XftDrawRect(xw.draw, &drawcol,
1555                                 borderpx + cx * win.cw,
1556                                 borderpx + cy * win.ch,
1557                                 win.cw - 1, 1);
1558                 XftDrawRect(xw.draw, &drawcol,
1559                                 borderpx + cx * win.cw,
1560                                 borderpx + cy * win.ch,
1561                                 1, win.ch - 1);
1562                 XftDrawRect(xw.draw, &drawcol,
1563                                 borderpx + (cx + 1) * win.cw - 1,
1564                                 borderpx + cy * win.ch,
1565                                 1, win.ch - 1);
1566                 XftDrawRect(xw.draw, &drawcol,
1567                                 borderpx + cx * win.cw,
1568                                 borderpx + (cy + 1) * win.ch - 1,
1569                                 win.cw, 1);
1570         }
1571 }
1572
1573 void
1574 xsetenv(void)
1575 {
1576         char buf[sizeof(long) * 8 + 1];
1577
1578         snprintf(buf, sizeof(buf), "%lu", xw.win);
1579         setenv("WINDOWID", buf, 1);
1580 }
1581
1582 void
1583 xsettitle(char *p)
1584 {
1585         XTextProperty prop;
1586         DEFAULT(p, opt_title);
1587
1588         Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
1589                         &prop);
1590         XSetWMName(xw.dpy, xw.win, &prop);
1591         XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
1592         XFree(prop.value);
1593 }
1594
1595 int
1596 xstartdraw(void)
1597 {
1598         return IS_SET(MODE_VISIBLE);
1599 }
1600
1601 void
1602 xdrawline(Line line, int x1, int y1, int x2)
1603 {
1604         int i, x, ox, numspecs;
1605         Glyph base, new;
1606         XftGlyphFontSpec *specs = xw.specbuf;
1607
1608         numspecs = xmakeglyphfontspecs(specs, &line[x1], x2 - x1, x1, y1);
1609         i = ox = 0;
1610         for (x = x1; x < x2 && i < numspecs; x++) {
1611                 new = line[x];
1612                 if (new.mode == ATTR_WDUMMY)
1613                         continue;
1614                 if (selected(x, y1))
1615                         new.mode ^= ATTR_REVERSE;
1616                 if (i > 0 && ATTRCMP(base, new)) {
1617                         xdrawglyphfontspecs(specs, base, i, ox, y1);
1618                         specs += i;
1619                         numspecs -= i;
1620                         i = 0;
1621                 }
1622                 if (i == 0) {
1623                         ox = x;
1624                         base = new;
1625                 }
1626                 i++;
1627         }
1628         if (i > 0)
1629                 xdrawglyphfontspecs(specs, base, i, ox, y1);
1630 }
1631
1632 void
1633 xfinishdraw(void)
1634 {
1635         XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, win.w,
1636                         win.h, 0, 0);
1637         XSetForeground(xw.dpy, dc.gc,
1638                         dc.col[IS_SET(MODE_REVERSE)?
1639                                 defaultfg : defaultbg].pixel);
1640 }
1641
1642 void
1643 xximspot(int x, int y)
1644 {
1645         if (xw.ime.xic == NULL)
1646                 return;
1647
1648         xw.ime.spot.x = borderpx + x * win.cw;
1649         xw.ime.spot.y = borderpx + (y + 1) * win.ch;
1650
1651         XSetICValues(xw.ime.xic, XNPreeditAttributes, xw.ime.spotlist, NULL);
1652 }
1653
1654 void
1655 expose(XEvent *ev)
1656 {
1657         redraw();
1658 }
1659
1660 void
1661 visibility(XEvent *ev)
1662 {
1663         XVisibilityEvent *e = &ev->xvisibility;
1664
1665         MODBIT(win.mode, e->state != VisibilityFullyObscured, MODE_VISIBLE);
1666 }
1667
1668 void
1669 unmap(XEvent *ev)
1670 {
1671         win.mode &= ~MODE_VISIBLE;
1672 }
1673
1674 void
1675 xsetpointermotion(int set)
1676 {
1677         MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
1678         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
1679 }
1680
1681 void
1682 xsetmode(int set, unsigned int flags)
1683 {
1684         int mode = win.mode;
1685         MODBIT(win.mode, set, flags);
1686         if ((win.mode & MODE_REVERSE) != (mode & MODE_REVERSE))
1687                 redraw();
1688 }
1689
1690 int
1691 xsetcursor(int cursor)
1692 {
1693         if (!BETWEEN(cursor, 0, 7)) /* 7: st extension */
1694                 return 1;
1695         win.cursor = cursor;
1696         return 0;
1697 }
1698
1699 void
1700 xseturgency(int add)
1701 {
1702         XWMHints *h = XGetWMHints(xw.dpy, xw.win);
1703
1704         MODBIT(h->flags, add, XUrgencyHint);
1705         XSetWMHints(xw.dpy, xw.win, h);
1706         XFree(h);
1707 }
1708
1709 void
1710 xbell(void)
1711 {
1712         if (!(IS_SET(MODE_FOCUSED)))
1713                 xseturgency(1);
1714         if (bellvolume)
1715                 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
1716 }
1717
1718 void
1719 focus(XEvent *ev)
1720 {
1721         XFocusChangeEvent *e = &ev->xfocus;
1722
1723         if (e->mode == NotifyGrab)
1724                 return;
1725
1726         if (ev->type == FocusIn) {
1727                 if (xw.ime.xic)
1728                         XSetICFocus(xw.ime.xic);
1729                 win.mode |= MODE_FOCUSED;
1730                 xseturgency(0);
1731                 if (IS_SET(MODE_FOCUS))
1732                         ttywrite("\033[I", 3, 0);
1733         } else {
1734                 if (xw.ime.xic)
1735                         XUnsetICFocus(xw.ime.xic);
1736                 win.mode &= ~MODE_FOCUSED;
1737                 if (IS_SET(MODE_FOCUS))
1738                         ttywrite("\033[O", 3, 0);
1739         }
1740 }
1741
1742 int
1743 match(uint mask, uint state)
1744 {
1745         return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
1746 }
1747
1748 char*
1749 kmap(KeySym k, uint state)
1750 {
1751         Key *kp;
1752         int i;
1753
1754         /* Check for mapped keys out of X11 function keys. */
1755         for (i = 0; i < LEN(mappedkeys); i++) {
1756                 if (mappedkeys[i] == k)
1757                         break;
1758         }
1759         if (i == LEN(mappedkeys)) {
1760                 if ((k & 0xFFFF) < 0xFD00)
1761                         return NULL;
1762         }
1763
1764         for (kp = key; kp < key + LEN(key); kp++) {
1765                 if (kp->k != k)
1766                         continue;
1767
1768                 if (!match(kp->mask, state))
1769                         continue;
1770
1771                 if (IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
1772                         continue;
1773                 if (IS_SET(MODE_NUMLOCK) && kp->appkey == 2)
1774                         continue;
1775
1776                 if (IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
1777                         continue;
1778
1779                 return kp->s;
1780         }
1781
1782         return NULL;
1783 }
1784
1785 void
1786 kpress(XEvent *ev)
1787 {
1788         XKeyEvent *e = &ev->xkey;
1789         KeySym ksym;
1790         char buf[64], *customkey;
1791         int len;
1792         Rune c;
1793         Status status;
1794         Shortcut *bp;
1795
1796         if (IS_SET(MODE_KBDLOCK))
1797                 return;
1798
1799         if (xw.ime.xic)
1800                 len = XmbLookupString(xw.ime.xic, e, buf, sizeof buf, &ksym, &status);
1801         else
1802                 len = XLookupString(e, buf, sizeof buf, &ksym, NULL);
1803         /* 1. shortcuts */
1804         for (bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
1805                 if (ksym == bp->keysym && match(bp->mod, e->state)) {
1806                         bp->func(&(bp->arg));
1807                         return;
1808                 }
1809         }
1810
1811         /* 2. custom keys from config.h */
1812         if ((customkey = kmap(ksym, e->state))) {
1813                 ttywrite(customkey, strlen(customkey), 1);
1814                 return;
1815         }
1816
1817         /* 3. composed string from input method */
1818         if (len == 0)
1819                 return;
1820         if (len == 1 && e->state & Mod1Mask) {
1821                 if (IS_SET(MODE_8BIT)) {
1822                         if (*buf < 0177) {
1823                                 c = *buf | 0x80;
1824                                 len = utf8encode(c, buf);
1825                         }
1826                 } else {
1827                         buf[1] = buf[0];
1828                         buf[0] = '\033';
1829                         len = 2;
1830                 }
1831         }
1832         ttywrite(buf, len, 1);
1833 }
1834
1835 void
1836 cmessage(XEvent *e)
1837 {
1838         /*
1839          * See xembed specs
1840          *  http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
1841          */
1842         if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
1843                 if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
1844                         win.mode |= MODE_FOCUSED;
1845                         xseturgency(0);
1846                 } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
1847                         win.mode &= ~MODE_FOCUSED;
1848                 }
1849         } else if (e->xclient.data.l[0] == xw.wmdeletewin) {
1850                 ttyhangup();
1851                 exit(0);
1852         }
1853 }
1854
1855 void
1856 resize(XEvent *e)
1857 {
1858         if (e->xconfigure.width == win.w && e->xconfigure.height == win.h)
1859                 return;
1860
1861         cresize(e->xconfigure.width, e->xconfigure.height);
1862 }
1863
1864 void
1865 run(void)
1866 {
1867         XEvent ev;
1868         int w = win.w, h = win.h;
1869         fd_set rfd;
1870         int xfd = XConnectionNumber(xw.dpy), ttyfd, xev, drawing;
1871         struct timespec seltv, *tv, now, lastblink, trigger;
1872         double timeout;
1873
1874         /* Waiting for window mapping */
1875         do {
1876                 XNextEvent(xw.dpy, &ev);
1877                 /*
1878                  * This XFilterEvent call is required because of XOpenIM. It
1879                  * does filter out the key event and some client message for
1880                  * the input method too.
1881                  */
1882                 if (XFilterEvent(&ev, None))
1883                         continue;
1884                 if (ev.type == ConfigureNotify) {
1885                         w = ev.xconfigure.width;
1886                         h = ev.xconfigure.height;
1887                 }
1888         } while (ev.type != MapNotify);
1889
1890         ttyfd = ttynew(opt_line, shell, opt_io, opt_cmd);
1891         cresize(w, h);
1892
1893         for (timeout = -1, drawing = 0, lastblink = (struct timespec){0};;) {
1894                 FD_ZERO(&rfd);
1895                 FD_SET(ttyfd, &rfd);
1896                 FD_SET(xfd, &rfd);
1897
1898                 if (XPending(xw.dpy))
1899                         timeout = 0;  /* existing events might not set xfd */
1900
1901                 seltv.tv_sec = timeout / 1E3;
1902                 seltv.tv_nsec = 1E6 * (timeout - 1E3 * seltv.tv_sec);
1903                 tv = timeout >= 0 ? &seltv : NULL;
1904
1905                 if (pselect(MAX(xfd, ttyfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
1906                         if (errno == EINTR)
1907                                 continue;
1908                         die("select failed: %s\n", strerror(errno));
1909                 }
1910                 clock_gettime(CLOCK_MONOTONIC, &now);
1911
1912                 if (FD_ISSET(ttyfd, &rfd))
1913                         ttyread();
1914
1915                 xev = 0;
1916                 while (XPending(xw.dpy)) {
1917                         xev = 1;
1918                         XNextEvent(xw.dpy, &ev);
1919                         if (XFilterEvent(&ev, None))
1920                                 continue;
1921                         if (handler[ev.type])
1922                                 (handler[ev.type])(&ev);
1923                 }
1924
1925                 /*
1926                  * To reduce flicker and tearing, when new content or event
1927                  * triggers drawing, we first wait a bit to ensure we got
1928                  * everything, and if nothing new arrives - we draw.
1929                  * We start with trying to wait minlatency ms. If more content
1930                  * arrives sooner, we retry with shorter and shorter periods,
1931                  * and eventually draw even without idle after maxlatency ms.
1932                  * Typically this results in low latency while interacting,
1933                  * maximum latency intervals during `cat huge.txt`, and perfect
1934                  * sync with periodic updates from animations/key-repeats/etc.
1935                  */
1936                 if (FD_ISSET(ttyfd, &rfd) || xev) {
1937                         if (!drawing) {
1938                                 trigger = now;
1939                                 drawing = 1;
1940                         }
1941                         timeout = (maxlatency - TIMEDIFF(now, trigger)) \
1942                                   / maxlatency * minlatency;
1943                         if (timeout > 0)
1944                                 continue;  /* we have time, try to find idle */
1945                 }
1946
1947                 /* idle detected or maxlatency exhausted -> draw */
1948                 timeout = -1;
1949                 if (blinktimeout && tattrset(ATTR_BLINK)) {
1950                         timeout = blinktimeout - TIMEDIFF(now, lastblink);
1951                         if (timeout <= 0) {
1952                                 if (-timeout > blinktimeout) /* start visible */
1953                                         win.mode |= MODE_BLINK;
1954                                 win.mode ^= MODE_BLINK;
1955                                 tsetdirtattr(ATTR_BLINK);
1956                                 lastblink = now;
1957                                 timeout = blinktimeout;
1958                         }
1959                 }
1960
1961                 draw();
1962                 XFlush(xw.dpy);
1963                 drawing = 0;
1964         }
1965 }
1966
1967 void
1968 usage(void)
1969 {
1970         die("usage: %s [-aiv] [-c class] [-f font] [-g geometry]"
1971             " [-n name] [-o file]\n"
1972             "          [-T title] [-t title] [-w windowid]"
1973             " [[-e] command [args ...]]\n"
1974             "       %s [-aiv] [-c class] [-f font] [-g geometry]"
1975             " [-n name] [-o file]\n"
1976             "          [-T title] [-t title] [-w windowid] -l line"
1977             " [stty_args ...]\n", argv0, argv0);
1978 }
1979
1980 int
1981 main(int argc, char *argv[])
1982 {
1983         xw.l = xw.t = 0;
1984         xw.isfixed = False;
1985         xsetcursor(cursorshape);
1986
1987         ARGBEGIN {
1988         case 'a':
1989                 allowaltscreen = 0;
1990                 break;
1991         case 'c':
1992                 opt_class = EARGF(usage());
1993                 break;
1994         case 'e':
1995                 if (argc > 0)
1996                         --argc, ++argv;
1997                 goto run;
1998         case 'f':
1999                 opt_font = EARGF(usage());
2000                 break;
2001         case 'g':
2002                 xw.gm = XParseGeometry(EARGF(usage()),
2003                                 &xw.l, &xw.t, &cols, &rows);
2004                 break;
2005         case 'i':
2006                 xw.isfixed = 1;
2007                 break;
2008         case 'o':
2009                 opt_io = EARGF(usage());
2010                 break;
2011         case 'l':
2012                 opt_line = EARGF(usage());
2013                 break;
2014         case 'n':
2015                 opt_name = EARGF(usage());
2016                 break;
2017         case 't':
2018         case 'T':
2019                 opt_title = EARGF(usage());
2020                 break;
2021         case 'w':
2022                 opt_embed = EARGF(usage());
2023                 break;
2024         case 'v':
2025                 die("%s " VERSION "\n", argv0);
2026                 break;
2027         default:
2028                 usage();
2029         } ARGEND;
2030
2031 run:
2032         if (argc > 0) /* eat all remaining arguments */
2033                 opt_cmd = argv;
2034
2035         if (!opt_title)
2036                 opt_title = (opt_line || !opt_cmd) ? "st" : opt_cmd[0];
2037
2038         setlocale(LC_CTYPE, "");
2039         XSetLocaleModifiers("");
2040         cols = MAX(cols, 1);
2041         rows = MAX(rows, 1);
2042         tnew(cols, rows);
2043         xinit(cols, rows);
2044         xsetenv();
2045         selinit();
2046         run();
2047
2048         return 0;
2049 }