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|1<<14)
  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, netwmiconname, 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(const 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 uint buttons; /* bit field of pressed buttons */
 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, btn, code;
 368         int x = evcol(e), y = evrow(e);
 369         int state = e->xbutton.state;
 370         char buf[40];
 371         static int ox, oy;
 372
 373         if (e->type == MotionNotify) {
 374                 if (x == ox && y == oy)
 375                         return;
 376                 if (!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
 377                         return;
 378                 /* MODE_MOUSEMOTION: no reporting if no button is pressed */
 379                 if (IS_SET(MODE_MOUSEMOTION) && buttons == 0)
 380                         return;
 381                 /* Set btn to lowest-numbered pressed button, or 12 if no
 382                  * buttons are pressed. */
 383                 for (btn = 1; btn <= 11 && !(buttons & (1<<(btn-1))); btn++)
 384                         ;
 385                 code = 32;
 386         } else {
 387                 btn = e->xbutton.button;
 388                 /* Only buttons 1 through 11 can be encoded */
 389                 if (btn < 1 || btn > 11)
 390                         return;
 391                 if (e->type == ButtonRelease) {
 392                         /* MODE_MOUSEX10: no button release reporting */
 393                         if (IS_SET(MODE_MOUSEX10))
 394                                 return;
 395                         /* Don't send release events for the scroll wheel */
 396                         if (btn == 4 || btn == 5)
 397                                 return;
 398                 }
 399                 code = 0;
 400         }
 401
 402         ox = x;
 403         oy = y;
 404
 405         /* Encode btn into code. If no button is pressed for a motion event in
 406          * MODE_MOUSEMANY, then encode it as a release. */
 407         if ((!IS_SET(MODE_MOUSESGR) && e->type == ButtonRelease) || btn == 12)
 408                 code += 3;
 409         else if (btn >= 8)
 410                 code += 128 + btn - 8;
 411         else if (btn >= 4)
 412                 code += 64 + btn - 4;
 413         else
 414                 code += btn - 1;
 415
 416         if (!IS_SET(MODE_MOUSEX10)) {
 417                 code += ((state & ShiftMask  ) ?  4 : 0)
 418                       + ((state & Mod1Mask   ) ?  8 : 0) /* meta key: alt */
 419                       + ((state & ControlMask) ? 16 : 0);
 420         }
 421
 422         if (IS_SET(MODE_MOUSESGR)) {
 423                 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
 424                                 code, x+1, y+1,
 425                                 e->type == ButtonRelease ? 'm' : 'M');
 426         } else if (x < 223 && y < 223) {
 427                 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
 428                                 32+code, 32+x+1, 32+y+1);
 429         } else {
 430                 return;
 431         }
 432
 433         ttywrite(buf, len, 0);
 434 }
 435
 436 uint
 437 buttonmask(uint button)
 438 {
 439         return button == Button1 ? Button1Mask
 440              : button == Button2 ? Button2Mask
 441              : button == Button3 ? Button3Mask
 442              : button == Button4 ? Button4Mask
 443              : button == Button5 ? Button5Mask
 444              : 0;
 445 }
 446
 447 int
 448 mouseaction(XEvent *e, uint release)
 449 {
 450         MouseShortcut *ms;
 451
 452         /* ignore Button<N>mask for Button<N> - it's set on release */
 453         uint state = e->xbutton.state & ~buttonmask(e->xbutton.button);
 454
 455         for (ms = mshortcuts; ms < mshortcuts + LEN(mshortcuts); ms++) {
 456                 if (ms->release == release &&
 457                     ms->button == e->xbutton.button &&
 458                     (match(ms->mod, state) ||  /* exact or forced */
 459                      match(ms->mod, state & ~forcemousemod))) {
 460                         ms->func(&(ms->arg));
 461                         return 1;
 462                 }
 463         }
 464
 465         return 0;
 466 }
 467
 468 void
 469 bpress(XEvent *e)
 470 {
 471         int btn = e->xbutton.button;
 472         struct timespec now;
 473         int snap;
 474
 475         if (1 <= btn && btn <= 11)
 476                 buttons |= 1 << (btn-1);
 477
 478         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forcemousemod)) {
 479                 mousereport(e);
 480                 return;
 481         }
 482
 483         if (mouseaction(e, 0))
 484                 return;
 485
 486         if (btn == Button1) {
 487                 /*
 488                  * If the user clicks below predefined timeouts specific
 489                  * snapping behaviour is exposed.
 490                  */
 491                 clock_gettime(CLOCK_MONOTONIC, &now);
 492                 if (TIMEDIFF(now, xsel.tclick2) <= tripleclicktimeout) {
 493                         snap = SNAP_LINE;
 494                 } else if (TIMEDIFF(now, xsel.tclick1) <= doubleclicktimeout) {
 495                         snap = SNAP_WORD;
 496                 } else {
 497                         snap = 0;
 498                 }
 499                 xsel.tclick2 = xsel.tclick1;
 500                 xsel.tclick1 = now;
 501
 502                 selstart(evcol(e), evrow(e), snap);
 503         }
 504 }
 505
 506 void
 507 propnotify(XEvent *e)
 508 {
 509         XPropertyEvent *xpev;
 510         Atom clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 511
 512         xpev = &e->xproperty;
 513         if (xpev->state == PropertyNewValue &&
 514                         (xpev->atom == XA_PRIMARY ||
 515                          xpev->atom == clipboard)) {
 516                 selnotify(e);
 517         }
 518 }
 519
 520 void
 521 selnotify(XEvent *e)
 522 {
 523         ulong nitems, ofs, rem;
 524         int format;
 525         uchar *data, *last, *repl;
 526         Atom type, incratom, property = None;
 527
 528         incratom = XInternAtom(xw.dpy, "INCR", 0);
 529
 530         ofs = 0;
 531         if (e->type == SelectionNotify)
 532                 property = e->xselection.property;
 533         else if (e->type == PropertyNotify)
 534                 property = e->xproperty.atom;
 535
 536         if (property == None)
 537                 return;
 538
 539         do {
 540                 if (XGetWindowProperty(xw.dpy, xw.win, property, ofs,
 541                                         BUFSIZ/4, False, AnyPropertyType,
 542                                         &type, &format, &nitems, &rem,
 543                                         &data)) {
 544                         fprintf(stderr, "Clipboard allocation failed\n");
 545                         return;
 546                 }
 547
 548                 if (e->type == PropertyNotify && nitems == 0 && rem == 0) {
 549                         /*
 550                          * If there is some PropertyNotify with no data, then
 551                          * this is the signal of the selection owner that all
 552                          * data has been transferred. We won't need to receive
 553                          * PropertyNotify events anymore.
 554                          */
 555                         MODBIT(xw.attrs.event_mask, 0, PropertyChangeMask);
 556                         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
 557                                         &xw.attrs);
 558                 }
 559
 560                 if (type == incratom) {
 561                         /*
 562                          * Activate the PropertyNotify events so we receive
 563                          * when the selection owner does send us the next
 564                          * chunk of data.
 565                          */
 566                         MODBIT(xw.attrs.event_mask, 1, PropertyChangeMask);
 567                         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
 568                                         &xw.attrs);
 569
 570                         /*
 571                          * Deleting the property is the transfer start signal.
 572                          */
 573                         XDeleteProperty(xw.dpy, xw.win, (int)property);
 574                         continue;
 575                 }
 576
 577                 /*
 578                  * As seen in getsel:
 579                  * Line endings are inconsistent in the terminal and GUI world
 580                  * copy and pasting. When receiving some selection data,
 581                  * replace all '\n' with '\r'.
 582                  * FIXME: Fix the computer world.
 583                  */
 584                 repl = data;
 585                 last = data + nitems * format / 8;
 586                 while ((repl = memchr(repl, '\n', last - repl))) {
 587                         *repl++ = '\r';
 588                 }
 589
 590                 if (IS_SET(MODE_BRCKTPASTE) && ofs == 0)
 591                         ttywrite("\033[200~", 6, 0);
 592                 ttywrite((char *)data, nitems * format / 8, 1);
 593                 if (IS_SET(MODE_BRCKTPASTE) && rem == 0)
 594                         ttywrite("\033[201~", 6, 0);
 595                 XFree(data);
 596                 /* number of 32-bit chunks returned */
 597                 ofs += nitems * format / 32;
 598         } while (rem > 0);
 599
 600         /*
 601          * Deleting the property again tells the selection owner to send the
 602          * next data chunk in the property.
 603          */
 604         XDeleteProperty(xw.dpy, xw.win, (int)property);
 605 }
 606
 607 void
 608 xclipcopy(void)
 609 {
 610         clipcopy(NULL);
 611 }
 612
 613 void
 614 selclear_(XEvent *e)
 615 {
 616         selclear();
 617 }
 618
 619 void
 620 selrequest(XEvent *e)
 621 {
 622         XSelectionRequestEvent *xsre;
 623         XSelectionEvent xev;
 624         Atom xa_targets, string, clipboard;
 625         char *seltext;
 626
 627         xsre = (XSelectionRequestEvent *) e;
 628         xev.type = SelectionNotify;
 629         xev.requestor = xsre->requestor;
 630         xev.selection = xsre->selection;
 631         xev.target = xsre->target;
 632         xev.time = xsre->time;
 633         if (xsre->property == None)
 634                 xsre->property = xsre->target;
 635
 636         /* reject */
 637         xev.property = None;
 638
 639         xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
 640         if (xsre->target == xa_targets) {
 641                 /* respond with the supported type */
 642                 string = xsel.xtarget;
 643                 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
 644                                 XA_ATOM, 32, PropModeReplace,
 645                                 (uchar *) &string, 1);
 646                 xev.property = xsre->property;
 647         } else if (xsre->target == xsel.xtarget || xsre->target == XA_STRING) {
 648                 /*
 649                  * xith XA_STRING non ascii characters may be incorrect in the
 650                  * requestor. It is not our problem, use utf8.
 651                  */
 652                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 653                 if (xsre->selection == XA_PRIMARY) {
 654                         seltext = xsel.primary;
 655                 } else if (xsre->selection == clipboard) {
 656                         seltext = xsel.clipboard;
 657                 } else {
 658                         fprintf(stderr,
 659                                 "Unhandled clipboard selection 0x%lx\n",
 660                                 xsre->selection);
 661                         return;
 662                 }
 663                 if (seltext != NULL) {
 664                         XChangeProperty(xsre->display, xsre->requestor,
 665                                         xsre->property, xsre->target,
 666                                         8, PropModeReplace,
 667                                         (uchar *)seltext, strlen(seltext));
 668                         xev.property = xsre->property;
 669                 }
 670         }
 671
 672         /* all done, send a notification to the listener */
 673         if (!XSendEvent(xsre->display, xsre->requestor, 1, 0, (XEvent *) &xev))
 674                 fprintf(stderr, "Error sending SelectionNotify event\n");
 675 }
 676
 677 void
 678 setsel(char *str, Time t)
 679 {
 680         if (!str)
 681                 return;
 682
 683         free(xsel.primary);
 684         xsel.primary = str;
 685
 686         XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
 687         if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
 688                 selclear();
 689 }
 690
 691 void
 692 xsetsel(char *str)
 693 {
 694         setsel(str, CurrentTime);
 695 }
 696
 697 void
 698 brelease(XEvent *e)
 699 {
 700         int btn = e->xbutton.button;
 701
 702         if (1 <= btn && btn <= 11)
 703                 buttons &= ~(1 << (btn-1));
 704
 705         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forcemousemod)) {
 706                 mousereport(e);
 707                 return;
 708         }
 709
 710         if (mouseaction(e, 1))
 711                 return;
 712         if (btn == Button1)
 713                 mousesel(e, 1);
 714 }
 715
 716 void
 717 bmotion(XEvent *e)
 718 {
 719         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forcemousemod)) {
 720                 mousereport(e);
 721                 return;
 722         }
 723
 724         mousesel(e, 0);
 725 }
 726
 727 void
 728 cresize(int width, int height)
 729 {
 730         int col, row;
 731
 732         if (width != 0)
 733                 win.w = width;
 734         if (height != 0)
 735                 win.h = height;
 736
 737         col = (win.w - 2 * borderpx) / win.cw;
 738         row = (win.h - 2 * borderpx) / win.ch;
 739         col = MAX(1, col);
 740         row = MAX(1, row);
 741
 742         tresize(col, row);
 743         xresize(col, row);
 744         ttyresize(win.tw, win.th);
 745 }
 746
 747 void
 748 xresize(int col, int row)
 749 {
 750         win.tw = col * win.cw;
 751         win.th = row * win.ch;
 752
 753         XFreePixmap(xw.dpy, xw.buf);
 754         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
 755                         DefaultDepth(xw.dpy, xw.scr));
 756         XftDrawChange(xw.draw, xw.buf);
 757         xclear(0, 0, win.w, win.h);
 758
 759         /* resize to new width */
 760         xw.specbuf = xrealloc(xw.specbuf, col * sizeof(GlyphFontSpec));
 761 }
 762
 763 ushort
 764 sixd_to_16bit(int x)
 765 {
 766         return x == 0 ? 0 : 0x3737 + 0x2828 * x;
 767 }
 768
 769 int
 770 xloadcolor(int i, const char *name, Color *ncolor)
 771 {
 772         XRenderColor color = { .alpha = 0xffff };
 773
 774         if (!name) {
 775                 if (BETWEEN(i, 16, 255)) { /* 256 color */
 776                         if (i < 6*6*6+16) { /* same colors as xterm */
 777                                 color.red   = sixd_to_16bit( ((i-16)/36)%6 );
 778                                 color.green = sixd_to_16bit( ((i-16)/6) %6 );
 779                                 color.blue  = sixd_to_16bit( ((i-16)/1) %6 );
 780                         } else { /* greyscale */
 781                                 color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
 782                                 color.green = color.blue = color.red;
 783                         }
 784                         return XftColorAllocValue(xw.dpy, xw.vis,
 785                                                   xw.cmap, &color, ncolor);
 786                 } else
 787                         name = colorname[i];
 788         }
 789
 790         return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
 791 }
 792
 793 void
 794 xloadcols(void)
 795 {
 796         int i;
 797         static int loaded;
 798         Color *cp;
 799
 800         if (loaded) {
 801                 for (cp = dc.col; cp < &dc.col[dc.collen]; ++cp)
 802                         XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
 803         } else {
 804                 dc.collen = MAX(LEN(colorname), 256);
 805                 dc.col = xmalloc(dc.collen * sizeof(Color));
 806         }
 807
 808         for (i = 0; i < dc.collen; i++)
 809                 if (!xloadcolor(i, NULL, &dc.col[i])) {
 810                         if (colorname[i])
 811                                 die("could not allocate color '%s'\n", colorname[i]);
 812                         else
 813                                 die("could not allocate color %d\n", i);
 814                 }
 815         loaded = 1;
 816 }
 817
 818 int
 819 xgetcolor(int x, unsigned char *r, unsigned char *g, unsigned char *b)
 820 {
 821         if (!BETWEEN(x, 0, dc.collen))
 822                 return 1;
 823
 824         *r = dc.col[x].color.red >> 8;
 825         *g = dc.col[x].color.green >> 8;
 826         *b = dc.col[x].color.blue >> 8;
 827
 828         return 0;
 829 }
 830
 831 int
 832 xsetcolorname(int x, const char *name)
 833 {
 834         Color ncolor;
 835
 836         if (!BETWEEN(x, 0, dc.collen))
 837                 return 1;
 838
 839         if (!xloadcolor(x, name, &ncolor))
 840                 return 1;
 841
 842         XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
 843         dc.col[x] = ncolor;
 844
 845         return 0;
 846 }
 847
 848 /*
 849  * Absolute coordinates.
 850  */
 851 void
 852 xclear(int x1, int y1, int x2, int y2)
 853 {
 854         XftDrawRect(xw.draw,
 855                         &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
 856                         x1, y1, x2-x1, y2-y1);
 857 }
 858
 859 void
 860 xhints(void)
 861 {
 862         XClassHint class = {opt_name ? opt_name : termname,
 863                             opt_class ? opt_class : termname};
 864         XWMHints wm = {.flags = InputHint, .input = 1};
 865         XSizeHints *sizeh;
 866
 867         sizeh = XAllocSizeHints();
 868
 869         sizeh->flags = PSize | PResizeInc | PBaseSize | PMinSize;
 870         sizeh->height = win.h;
 871         sizeh->width = win.w;
 872         sizeh->height_inc = win.ch;
 873         sizeh->width_inc = win.cw;
 874         sizeh->base_height = 2 * borderpx;
 875         sizeh->base_width = 2 * borderpx;
 876         sizeh->min_height = win.ch + 2 * borderpx;
 877         sizeh->min_width = win.cw + 2 * borderpx;
 878         if (xw.isfixed) {
 879                 sizeh->flags |= PMaxSize;
 880                 sizeh->min_width = sizeh->max_width = win.w;
 881                 sizeh->min_height = sizeh->max_height = win.h;
 882         }
 883         if (xw.gm & (XValue|YValue)) {
 884                 sizeh->flags |= USPosition | PWinGravity;
 885                 sizeh->x = xw.l;
 886                 sizeh->y = xw.t;
 887                 sizeh->win_gravity = xgeommasktogravity(xw.gm);
 888         }
 889
 890         XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
 891                         &class);
 892         XFree(sizeh);
 893 }
 894
 895 int
 896 xgeommasktogravity(int mask)
 897 {
 898         switch (mask & (XNegative|YNegative)) {
 899         case 0:
 900                 return NorthWestGravity;
 901         case XNegative:
 902                 return NorthEastGravity;
 903         case YNegative:
 904                 return SouthWestGravity;
 905         }
 906
 907         return SouthEastGravity;
 908 }
 909
 910 int
 911 xloadfont(Font *f, FcPattern *pattern)
 912 {
 913         FcPattern *configured;
 914         FcPattern *match;
 915         FcResult result;
 916         XGlyphInfo extents;
 917         int wantattr, haveattr;
 918
 919         /*
 920          * Manually configure instead of calling XftMatchFont
 921          * so that we can use the configured pattern for
 922          * "missing glyph" lookups.
 923          */
 924         configured = FcPatternDuplicate(pattern);
 925         if (!configured)
 926                 return 1;
 927
 928         FcConfigSubstitute(NULL, configured, FcMatchPattern);
 929         XftDefaultSubstitute(xw.dpy, xw.scr, configured);
 930
 931         match = FcFontMatch(NULL, configured, &result);
 932         if (!match) {
 933                 FcPatternDestroy(configured);
 934                 return 1;
 935         }
 936
 937         if (!(f->match = XftFontOpenPattern(xw.dpy, match))) {
 938                 FcPatternDestroy(configured);
 939                 FcPatternDestroy(match);
 940                 return 1;
 941         }
 942
 943         if ((XftPatternGetInteger(pattern, "slant", 0, &wantattr) ==
 944             XftResultMatch)) {
 945                 /*
 946                  * Check if xft was unable to find a font with the appropriate
 947                  * slant but gave us one anyway. Try to mitigate.
 948                  */
 949                 if ((XftPatternGetInteger(f->match->pattern, "slant", 0,
 950                     &haveattr) != XftResultMatch) || haveattr < wantattr) {
 951                         f->badslant = 1;
 952                         fputs("font slant does not match\n", stderr);
 953                 }
 954         }
 955
 956         if ((XftPatternGetInteger(pattern, "weight", 0, &wantattr) ==
 957             XftResultMatch)) {
 958                 if ((XftPatternGetInteger(f->match->pattern, "weight", 0,
 959                     &haveattr) != XftResultMatch) || haveattr != wantattr) {
 960                         f->badweight = 1;
 961                         fputs("font weight does not match\n", stderr);
 962                 }
 963         }
 964
 965         XftTextExtentsUtf8(xw.dpy, f->match,
 966                 (const FcChar8 *) ascii_printable,
 967                 strlen(ascii_printable), &extents);
 968
 969         f->set = NULL;
 970         f->pattern = configured;
 971
 972         f->ascent = f->match->ascent;
 973         f->descent = f->match->descent;
 974         f->lbearing = 0;
 975         f->rbearing = f->match->max_advance_width;
 976
 977         f->height = f->ascent + f->descent;
 978         f->width = DIVCEIL(extents.xOff, strlen(ascii_printable));
 979
 980         return 0;
 981 }
 982
 983 void
 984 xloadfonts(const char *fontstr, double fontsize)
 985 {
 986         FcPattern *pattern;
 987         double fontval;
 988
 989         if (fontstr[0] == '-')
 990                 pattern = XftXlfdParse(fontstr, False, False);
 991         else
 992                 pattern = FcNameParse((const FcChar8 *)fontstr);
 993
 994         if (!pattern)
 995                 die("can't open font %s\n", fontstr);
 996
 997         if (fontsize > 1) {
 998                 FcPatternDel(pattern, FC_PIXEL_SIZE);
 999                 FcPatternDel(pattern, FC_SIZE);
1000                 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
1001                 usedfontsize = fontsize;
1002         } else {
1003                 if (FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval) ==
1004                                 FcResultMatch) {
1005                         usedfontsize = fontval;
1006                 } else if (FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval) ==
1007                                 FcResultMatch) {
1008                         usedfontsize = -1;
1009                 } else {
1010                         /*
1011                          * Default font size is 12, if none given. This is to
1012                          * have a known usedfontsize value.
1013                          */
1014                         FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
1015                         usedfontsize = 12;
1016                 }
1017                 defaultfontsize = usedfontsize;
1018         }
1019
1020         if (xloadfont(&dc.font, pattern))
1021                 die("can't open font %s\n", fontstr);
1022
1023         if (usedfontsize < 0) {
1024                 FcPatternGetDouble(dc.font.match->pattern,
1025                                    FC_PIXEL_SIZE, 0, &fontval);
1026                 usedfontsize = fontval;
1027                 if (fontsize == 0)
1028                         defaultfontsize = fontval;
1029         }
1030
1031         /* Setting character width and height. */
1032         win.cw = ceilf(dc.font.width * cwscale);
1033         win.ch = ceilf(dc.font.height * chscale);
1034
1035         FcPatternDel(pattern, FC_SLANT);
1036         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
1037         if (xloadfont(&dc.ifont, pattern))
1038                 die("can't open font %s\n", fontstr);
1039
1040         FcPatternDel(pattern, FC_WEIGHT);
1041         FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
1042         if (xloadfont(&dc.ibfont, pattern))
1043                 die("can't open font %s\n", fontstr);
1044
1045         FcPatternDel(pattern, FC_SLANT);
1046         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
1047         if (xloadfont(&dc.bfont, pattern))
1048                 die("can't open font %s\n", fontstr);
1049
1050         FcPatternDestroy(pattern);
1051 }
1052
1053 void
1054 xunloadfont(Font *f)
1055 {
1056         XftFontClose(xw.dpy, f->match);
1057         FcPatternDestroy(f->pattern);
1058         if (f->set)
1059                 FcFontSetDestroy(f->set);
1060 }
1061
1062 void
1063 xunloadfonts(void)
1064 {
1065         /* Free the loaded fonts in the font cache.  */
1066         while (frclen > 0)
1067                 XftFontClose(xw.dpy, frc[--frclen].font);
1068
1069         xunloadfont(&dc.font);
1070         xunloadfont(&dc.bfont);
1071         xunloadfont(&dc.ifont);
1072         xunloadfont(&dc.ibfont);
1073 }
1074
1075 int
1076 ximopen(Display *dpy)
1077 {
1078         XIMCallback imdestroy = { .client_data = NULL, .callback = ximdestroy };
1079         XICCallback icdestroy = { .client_data = NULL, .callback = xicdestroy };
1080
1081         xw.ime.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
1082         if (xw.ime.xim == NULL)
1083                 return 0;
1084
1085         if (XSetIMValues(xw.ime.xim, XNDestroyCallback, &imdestroy, NULL))
1086                 fprintf(stderr, "XSetIMValues: "
1087                                 "Could not set XNDestroyCallback.\n");
1088
1089         xw.ime.spotlist = XVaCreateNestedList(0, XNSpotLocation, &xw.ime.spot,
1090                                               NULL);
1091
1092         if (xw.ime.xic == NULL) {
1093                 xw.ime.xic = XCreateIC(xw.ime.xim, XNInputStyle,
1094                                        XIMPreeditNothing | XIMStatusNothing,
1095                                        XNClientWindow, xw.win,
1096                                        XNDestroyCallback, &icdestroy,
1097                                        NULL);
1098         }
1099         if (xw.ime.xic == NULL)
1100                 fprintf(stderr, "XCreateIC: Could not create input context.\n");
1101
1102         return 1;
1103 }
1104
1105 void
1106 ximinstantiate(Display *dpy, XPointer client, XPointer call)
1107 {
1108         if (ximopen(dpy))
1109                 XUnregisterIMInstantiateCallback(xw.dpy, NULL, NULL, NULL,
1110                                                  ximinstantiate, NULL);
1111 }
1112
1113 void
1114 ximdestroy(XIM xim, XPointer client, XPointer call)
1115 {
1116         xw.ime.xim = NULL;
1117         XRegisterIMInstantiateCallback(xw.dpy, NULL, NULL, NULL,
1118                                        ximinstantiate, NULL);
1119         XFree(xw.ime.spotlist);
1120 }
1121
1122 int
1123 xicdestroy(XIC xim, XPointer client, XPointer call)
1124 {
1125         xw.ime.xic = NULL;
1126         return 1;
1127 }
1128
1129 void
1130 xinit(int cols, int rows)
1131 {
1132         XGCValues gcvalues;
1133         Cursor cursor;
1134         Window parent;
1135         pid_t thispid = getpid();
1136         XColor xmousefg, xmousebg;
1137
1138         if (!(xw.dpy = XOpenDisplay(NULL)))
1139                 die("can't open display\n");
1140         xw.scr = XDefaultScreen(xw.dpy);
1141         xw.vis = XDefaultVisual(xw.dpy, xw.scr);
1142
1143         /* font */
1144         if (!FcInit())
1145                 die("could not init fontconfig.\n");
1146
1147         usedfont = (opt_font == NULL)? font : opt_font;
1148         xloadfonts(usedfont, 0);
1149
1150         /* colors */
1151         xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1152         xloadcols();
1153
1154         /* adjust fixed window geometry */
1155         win.w = 2 * borderpx + cols * win.cw;
1156         win.h = 2 * borderpx + rows * win.ch;
1157         if (xw.gm & XNegative)
1158                 xw.l += DisplayWidth(xw.dpy, xw.scr) - win.w - 2;
1159         if (xw.gm & YNegative)
1160                 xw.t += DisplayHeight(xw.dpy, xw.scr) - win.h - 2;
1161
1162         /* Events */
1163         xw.attrs.background_pixel = dc.col[defaultbg].pixel;
1164         xw.attrs.border_pixel = dc.col[defaultbg].pixel;
1165         xw.attrs.bit_gravity = NorthWestGravity;
1166         xw.attrs.event_mask = FocusChangeMask | KeyPressMask | KeyReleaseMask
1167                 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1168                 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
1169         xw.attrs.colormap = xw.cmap;
1170
1171         if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
1172                 parent = XRootWindow(xw.dpy, xw.scr);
1173         xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
1174                         win.w, win.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
1175                         xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
1176                         | CWEventMask | CWColormap, &xw.attrs);
1177
1178         memset(&gcvalues, 0, sizeof(gcvalues));
1179         gcvalues.graphics_exposures = False;
1180         dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
1181                         &gcvalues);
1182         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
1183                         DefaultDepth(xw.dpy, xw.scr));
1184         XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
1185         XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, win.w, win.h);
1186
1187         /* font spec buffer */
1188         xw.specbuf = xmalloc(cols * sizeof(GlyphFontSpec));
1189
1190         /* Xft rendering context */
1191         xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
1192
1193         /* input methods */
1194         if (!ximopen(xw.dpy)) {
1195                 XRegisterIMInstantiateCallback(xw.dpy, NULL, NULL, NULL,
1196                                                ximinstantiate, NULL);
1197         }
1198
1199         /* white cursor, black outline */
1200         cursor = XCreateFontCursor(xw.dpy, mouseshape);
1201         XDefineCursor(xw.dpy, xw.win, cursor);
1202
1203         if (XParseColor(xw.dpy, xw.cmap, colorname[mousefg], &xmousefg) == 0) {
1204                 xmousefg.red   = 0xffff;
1205                 xmousefg.green = 0xffff;
1206                 xmousefg.blue  = 0xffff;
1207         }
1208
1209         if (XParseColor(xw.dpy, xw.cmap, colorname[mousebg], &xmousebg) == 0) {
1210                 xmousebg.red   = 0x0000;
1211                 xmousebg.green = 0x0000;
1212                 xmousebg.blue  = 0x0000;
1213         }
1214
1215         XRecolorCursor(xw.dpy, cursor, &xmousefg, &xmousebg);
1216
1217         xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
1218         xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
1219         xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
1220         xw.netwmiconname = XInternAtom(xw.dpy, "_NET_WM_ICON_NAME", False);
1221         XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
1222
1223         xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
1224         XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
1225                         PropModeReplace, (uchar *)&thispid, 1);
1226
1227         win.mode = MODE_NUMLOCK;
1228         resettitle();
1229         xhints();
1230         XMapWindow(xw.dpy, xw.win);
1231         XSync(xw.dpy, False);
1232
1233         clock_gettime(CLOCK_MONOTONIC, &xsel.tclick1);
1234         clock_gettime(CLOCK_MONOTONIC, &xsel.tclick2);
1235         xsel.primary = NULL;
1236         xsel.clipboard = NULL;
1237         xsel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
1238         if (xsel.xtarget == None)
1239                 xsel.xtarget = XA_STRING;
1240 }
1241
1242 int
1243 xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x, int y)
1244 {
1245         float winx = borderpx + x * win.cw, winy = borderpx + y * win.ch, xp, yp;
1246         ushort mode, prevmode = USHRT_MAX;
1247         Font *font = &dc.font;
1248         int frcflags = FRC_NORMAL;
1249         float runewidth = win.cw;
1250         Rune rune;
1251         FT_UInt glyphidx;
1252         FcResult fcres;
1253         FcPattern *fcpattern, *fontpattern;
1254         FcFontSet *fcsets[] = { NULL };
1255         FcCharSet *fccharset;
1256         int i, f, numspecs = 0;
1257
1258         for (i = 0, xp = winx, yp = winy + font->ascent; i < len; ++i) {
1259                 /* Fetch rune and mode for current glyph. */
1260                 rune = glyphs[i].u;
1261                 mode = glyphs[i].mode;
1262
1263                 /* Skip dummy wide-character spacing. */
1264                 if (mode == ATTR_WDUMMY)
1265                         continue;
1266
1267                 /* Determine font for glyph if different from previous glyph. */
1268                 if (prevmode != mode) {
1269                         prevmode = mode;
1270                         font = &dc.font;
1271                         frcflags = FRC_NORMAL;
1272                         runewidth = win.cw * ((mode & ATTR_WIDE) ? 2.0f : 1.0f);
1273                         if ((mode & ATTR_ITALIC) && (mode & ATTR_BOLD)) {
1274                                 font = &dc.ibfont;
1275                                 frcflags = FRC_ITALICBOLD;
1276                         } else if (mode & ATTR_ITALIC) {
1277                                 font = &dc.ifont;
1278                                 frcflags = FRC_ITALIC;
1279                         } else if (mode & ATTR_BOLD) {
1280                                 font = &dc.bfont;
1281                                 frcflags = FRC_BOLD;
1282                         }
1283                         yp = winy + font->ascent;
1284                 }
1285
1286                 /* Lookup character index with default font. */
1287                 glyphidx = XftCharIndex(xw.dpy, font->match, rune);
1288                 if (glyphidx) {
1289                         specs[numspecs].font = font->match;
1290                         specs[numspecs].glyph = glyphidx;
1291                         specs[numspecs].x = (short)xp;
1292                         specs[numspecs].y = (short)yp;
1293                         xp += runewidth;
1294                         numspecs++;
1295                         continue;
1296                 }
1297
1298                 /* Fallback on font cache, search the font cache for match. */
1299                 for (f = 0; f < frclen; f++) {
1300                         glyphidx = XftCharIndex(xw.dpy, frc[f].font, rune);
1301                         /* Everything correct. */
1302                         if (glyphidx && frc[f].flags == frcflags)
1303                                 break;
1304                         /* We got a default font for a not found glyph. */
1305                         if (!glyphidx && frc[f].flags == frcflags
1306                                         && frc[f].unicodep == rune) {
1307                                 break;
1308                         }
1309                 }
1310
1311                 /* Nothing was found. Use fontconfig to find matching font. */
1312                 if (f >= frclen) {
1313                         if (!font->set)
1314                                 font->set = FcFontSort(0, font->pattern,
1315                                                        1, 0, &fcres);
1316                         fcsets[0] = font->set;
1317
1318                         /*
1319                          * Nothing was found in the cache. Now use
1320                          * some dozen of Fontconfig calls to get the
1321                          * font for one single character.
1322                          *
1323                          * Xft and fontconfig are design failures.
1324                          */
1325                         fcpattern = FcPatternDuplicate(font->pattern);
1326                         fccharset = FcCharSetCreate();
1327
1328                         FcCharSetAddChar(fccharset, rune);
1329                         FcPatternAddCharSet(fcpattern, FC_CHARSET,
1330                                         fccharset);
1331                         FcPatternAddBool(fcpattern, FC_SCALABLE, 1);
1332
1333                         FcConfigSubstitute(0, fcpattern,
1334                                         FcMatchPattern);
1335                         FcDefaultSubstitute(fcpattern);
1336
1337                         fontpattern = FcFontSetMatch(0, fcsets, 1,
1338                                         fcpattern, &fcres);
1339
1340                         /* Allocate memory for the new cache entry. */
1341                         if (frclen >= frccap) {
1342                                 frccap += 16;
1343                                 frc = xrealloc(frc, frccap * sizeof(Fontcache));
1344                         }
1345
1346                         frc[frclen].font = XftFontOpenPattern(xw.dpy,
1347                                         fontpattern);
1348                         if (!frc[frclen].font)
1349                                 die("XftFontOpenPattern failed seeking fallback font: %s\n",
1350                                         strerror(errno));
1351                         frc[frclen].flags = frcflags;
1352                         frc[frclen].unicodep = rune;
1353
1354                         glyphidx = XftCharIndex(xw.dpy, frc[frclen].font, rune);
1355
1356                         f = frclen;
1357                         frclen++;
1358
1359                         FcPatternDestroy(fcpattern);
1360                         FcCharSetDestroy(fccharset);
1361                 }
1362
1363                 specs[numspecs].font = frc[f].font;
1364                 specs[numspecs].glyph = glyphidx;
1365                 specs[numspecs].x = (short)xp;
1366                 specs[numspecs].y = (short)yp;
1367                 xp += runewidth;
1368                 numspecs++;
1369         }
1370
1371         return numspecs;
1372 }
1373
1374 void
1375 xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, int y)
1376 {
1377         int charlen = len * ((base.mode & ATTR_WIDE) ? 2 : 1);
1378         int winx = borderpx + x * win.cw, winy = borderpx + y * win.ch,
1379             width = charlen * win.cw;
1380         Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
1381         XRenderColor colfg, colbg;
1382         XRectangle r;
1383
1384         /* Fallback on color display for attributes not supported by the font */
1385         if (base.mode & ATTR_ITALIC && base.mode & ATTR_BOLD) {
1386                 if (dc.ibfont.badslant || dc.ibfont.badweight)
1387                         base.fg = defaultattr;
1388         } else if ((base.mode & ATTR_ITALIC && dc.ifont.badslant) ||
1389             (base.mode & ATTR_BOLD && dc.bfont.badweight)) {
1390                 base.fg = defaultattr;
1391         }
1392
1393         if (IS_TRUECOL(base.fg)) {
1394                 colfg.alpha = 0xffff;
1395                 colfg.red = TRUERED(base.fg);
1396                 colfg.green = TRUEGREEN(base.fg);
1397                 colfg.blue = TRUEBLUE(base.fg);
1398                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
1399                 fg = &truefg;
1400         } else {
1401                 fg = &dc.col[base.fg];
1402         }
1403
1404         if (IS_TRUECOL(base.bg)) {
1405                 colbg.alpha = 0xffff;
1406                 colbg.green = TRUEGREEN(base.bg);
1407                 colbg.red = TRUERED(base.bg);
1408                 colbg.blue = TRUEBLUE(base.bg);
1409                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
1410                 bg = &truebg;
1411         } else {
1412                 bg = &dc.col[base.bg];
1413         }
1414
1415         /* Change basic system colors [0-7] to bright system colors [8-15] */
1416         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_BOLD && BETWEEN(base.fg, 0, 7))
1417                 fg = &dc.col[base.fg + 8];
1418
1419         if (IS_SET(MODE_REVERSE)) {
1420                 if (fg == &dc.col[defaultfg]) {
1421                         fg = &dc.col[defaultbg];
1422                 } else {
1423                         colfg.red = ~fg->color.red;
1424                         colfg.green = ~fg->color.green;
1425                         colfg.blue = ~fg->color.blue;
1426                         colfg.alpha = fg->color.alpha;
1427                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
1428                                         &revfg);
1429                         fg = &revfg;
1430                 }
1431
1432                 if (bg == &dc.col[defaultbg]) {
1433                         bg = &dc.col[defaultfg];
1434                 } else {
1435                         colbg.red = ~bg->color.red;
1436                         colbg.green = ~bg->color.green;
1437                         colbg.blue = ~bg->color.blue;
1438                         colbg.alpha = bg->color.alpha;
1439                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
1440                                         &revbg);
1441                         bg = &revbg;
1442                 }
1443         }
1444
1445         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_FAINT) {
1446                 colfg.red = fg->color.red / 2;
1447                 colfg.green = fg->color.green / 2;
1448                 colfg.blue = fg->color.blue / 2;
1449                 colfg.alpha = fg->color.alpha;
1450                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
1451                 fg = &revfg;
1452         }
1453
1454         if (base.mode & ATTR_REVERSE) {
1455                 temp = fg;
1456                 fg = bg;
1457                 bg = temp;
1458         }
1459
1460         if (base.mode & ATTR_BLINK && win.mode & MODE_BLINK)
1461                 fg = bg;
1462
1463         if (base.mode & ATTR_INVISIBLE)
1464                 fg = bg;
1465
1466         /* Intelligent cleaning up of the borders. */
1467         if (x == 0) {
1468                 xclear(0, (y == 0)? 0 : winy, borderpx,
1469                         winy + win.ch +
1470                         ((winy + win.ch >= borderpx + win.th)? win.h : 0));
1471         }
1472         if (winx + width >= borderpx + win.tw) {
1473                 xclear(winx + width, (y == 0)? 0 : winy, win.w,
1474                         ((winy + win.ch >= borderpx + win.th)? win.h : (winy + win.ch)));
1475         }
1476         if (y == 0)
1477                 xclear(winx, 0, winx + width, borderpx);
1478         if (winy + win.ch >= borderpx + win.th)
1479                 xclear(winx, winy + win.ch, winx + width, win.h);
1480
1481         /* Clean up the region we want to draw to. */
1482         XftDrawRect(xw.draw, bg, winx, winy, width, win.ch);
1483
1484         /* Set the clip region because Xft is sometimes dirty. */
1485         r.x = 0;
1486         r.y = 0;
1487         r.height = win.ch;
1488         r.width = width;
1489         XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
1490
1491         /* Render the glyphs. */
1492         XftDrawGlyphFontSpec(xw.draw, fg, specs, len);
1493
1494         /* Render underline and strikethrough. */
1495         if (base.mode & ATTR_UNDERLINE) {
1496                 XftDrawRect(xw.draw, fg, winx, winy + dc.font.ascent * chscale + 1,
1497                                 width, 1);
1498         }
1499
1500         if (base.mode & ATTR_STRUCK) {
1501                 XftDrawRect(xw.draw, fg, winx, winy + 2 * dc.font.ascent * chscale / 3,
1502                                 width, 1);
1503         }
1504
1505         /* Reset clip to none. */
1506         XftDrawSetClip(xw.draw, 0);
1507 }
1508
1509 void
1510 xdrawglyph(Glyph g, int x, int y)
1511 {
1512         int numspecs;
1513         XftGlyphFontSpec spec;
1514
1515         numspecs = xmakeglyphfontspecs(&spec, &g, 1, x, y);
1516         xdrawglyphfontspecs(&spec, g, numspecs, x, y);
1517 }
1518
1519 void
1520 xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og)
1521 {
1522         Color drawcol;
1523
1524         /* remove the old cursor */
1525         if (selected(ox, oy))
1526                 og.mode ^= ATTR_REVERSE;
1527         xdrawglyph(og, ox, oy);
1528
1529         if (IS_SET(MODE_HIDE))
1530                 return;
1531
1532         /*
1533          * Select the right color for the right mode.
1534          */
1535         g.mode &= ATTR_BOLD|ATTR_ITALIC|ATTR_UNDERLINE|ATTR_STRUCK|ATTR_WIDE;
1536
1537         if (IS_SET(MODE_REVERSE)) {
1538                 g.mode |= ATTR_REVERSE;
1539                 g.bg = defaultfg;
1540                 if (selected(cx, cy)) {
1541                         drawcol = dc.col[defaultcs];
1542                         g.fg = defaultrcs;
1543                 } else {
1544                         drawcol = dc.col[defaultrcs];
1545                         g.fg = defaultcs;
1546                 }
1547         } else {
1548                 if (selected(cx, cy)) {
1549                         g.fg = defaultfg;
1550                         g.bg = defaultrcs;
1551                 } else {
1552                         g.fg = defaultbg;
1553                         g.bg = defaultcs;
1554                 }
1555                 drawcol = dc.col[g.bg];
1556         }
1557
1558         /* draw the new one */
1559         if (IS_SET(MODE_FOCUSED)) {
1560                 switch (win.cursor) {
1561                 case 7: /* st extension */
1562                         g.u = 0x2603; /* snowman (U+2603) */
1563                         /* FALLTHROUGH */
1564                 case 0: /* Blinking Block */
1565                 case 1: /* Blinking Block (Default) */
1566                 case 2: /* Steady Block */
1567                         xdrawglyph(g, cx, cy);
1568                         break;
1569                 case 3: /* Blinking Underline */
1570                 case 4: /* Steady Underline */
1571                         XftDrawRect(xw.draw, &drawcol,
1572                                         borderpx + cx * win.cw,
1573                                         borderpx + (cy + 1) * win.ch - \
1574                                                 cursorthickness,
1575                                         win.cw, cursorthickness);
1576                         break;
1577                 case 5: /* Blinking bar */
1578                 case 6: /* Steady bar */
1579                         XftDrawRect(xw.draw, &drawcol,
1580                                         borderpx + cx * win.cw,
1581                                         borderpx + cy * win.ch,
1582                                         cursorthickness, win.ch);
1583                         break;
1584                 }
1585         } else {
1586                 XftDrawRect(xw.draw, &drawcol,
1587                                 borderpx + cx * win.cw,
1588                                 borderpx + cy * win.ch,
1589                                 win.cw - 1, 1);
1590                 XftDrawRect(xw.draw, &drawcol,
1591                                 borderpx + cx * win.cw,
1592                                 borderpx + cy * win.ch,
1593                                 1, win.ch - 1);
1594                 XftDrawRect(xw.draw, &drawcol,
1595                                 borderpx + (cx + 1) * win.cw - 1,
1596                                 borderpx + cy * win.ch,
1597                                 1, win.ch - 1);
1598                 XftDrawRect(xw.draw, &drawcol,
1599                                 borderpx + cx * win.cw,
1600                                 borderpx + (cy + 1) * win.ch - 1,
1601                                 win.cw, 1);
1602         }
1603 }
1604
1605 void
1606 xsetenv(void)
1607 {
1608         char buf[sizeof(long) * 8 + 1];
1609
1610         snprintf(buf, sizeof(buf), "%lu", xw.win);
1611         setenv("WINDOWID", buf, 1);
1612 }
1613
1614 void
1615 xseticontitle(char *p)
1616 {
1617         XTextProperty prop;
1618         DEFAULT(p, opt_title);
1619
1620         if (Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
1621                                         &prop) != Success)
1622                 return;
1623         XSetWMIconName(xw.dpy, xw.win, &prop);
1624         XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmiconname);
1625         XFree(prop.value);
1626 }
1627
1628 void
1629 xsettitle(char *p)
1630 {
1631         XTextProperty prop;
1632         DEFAULT(p, opt_title);
1633
1634         if (Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
1635                                         &prop) != Success)
1636                 return;
1637         XSetWMName(xw.dpy, xw.win, &prop);
1638         XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
1639         XFree(prop.value);
1640 }
1641
1642 int
1643 xstartdraw(void)
1644 {
1645         return IS_SET(MODE_VISIBLE);
1646 }
1647
1648 void
1649 xdrawline(Line line, int x1, int y1, int x2)
1650 {
1651         int i, x, ox, numspecs;
1652         Glyph base, new;
1653         XftGlyphFontSpec *specs = xw.specbuf;
1654
1655         numspecs = xmakeglyphfontspecs(specs, &line[x1], x2 - x1, x1, y1);
1656         i = ox = 0;
1657         for (x = x1; x < x2 && i < numspecs; x++) {
1658                 new = line[x];
1659                 if (new.mode == ATTR_WDUMMY)
1660                         continue;
1661                 if (selected(x, y1))
1662                         new.mode ^= ATTR_REVERSE;
1663                 if (i > 0 && ATTRCMP(base, new)) {
1664                         xdrawglyphfontspecs(specs, base, i, ox, y1);
1665                         specs += i;
1666                         numspecs -= i;
1667                         i = 0;
1668                 }
1669                 if (i == 0) {
1670                         ox = x;
1671                         base = new;
1672                 }
1673                 i++;
1674         }
1675         if (i > 0)
1676                 xdrawglyphfontspecs(specs, base, i, ox, y1);
1677 }
1678
1679 void
1680 xfinishdraw(void)
1681 {
1682         XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, win.w,
1683                         win.h, 0, 0);
1684         XSetForeground(xw.dpy, dc.gc,
1685                         dc.col[IS_SET(MODE_REVERSE)?
1686                                 defaultfg : defaultbg].pixel);
1687 }
1688
1689 void
1690 xximspot(int x, int y)
1691 {
1692         if (xw.ime.xic == NULL)
1693                 return;
1694
1695         xw.ime.spot.x = borderpx + x * win.cw;
1696         xw.ime.spot.y = borderpx + (y + 1) * win.ch;
1697
1698         XSetICValues(xw.ime.xic, XNPreeditAttributes, xw.ime.spotlist, NULL);
1699 }
1700
1701 void
1702 expose(XEvent *ev)
1703 {
1704         redraw();
1705 }
1706
1707 void
1708 visibility(XEvent *ev)
1709 {
1710         XVisibilityEvent *e = &ev->xvisibility;
1711
1712         MODBIT(win.mode, e->state != VisibilityFullyObscured, MODE_VISIBLE);
1713 }
1714
1715 void
1716 unmap(XEvent *ev)
1717 {
1718         win.mode &= ~MODE_VISIBLE;
1719 }
1720
1721 void
1722 xsetpointermotion(int set)
1723 {
1724         MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
1725         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
1726 }
1727
1728 void
1729 xsetmode(int set, unsigned int flags)
1730 {
1731         int mode = win.mode;
1732         MODBIT(win.mode, set, flags);
1733         if ((win.mode & MODE_REVERSE) != (mode & MODE_REVERSE))
1734                 redraw();
1735 }
1736
1737 int
1738 xsetcursor(int cursor)
1739 {
1740         if (!BETWEEN(cursor, 0, 7)) /* 7: st extension */
1741                 return 1;
1742         win.cursor = cursor;
1743         return 0;
1744 }
1745
1746 void
1747 xseturgency(int add)
1748 {
1749         XWMHints *h = XGetWMHints(xw.dpy, xw.win);
1750
1751         MODBIT(h->flags, add, XUrgencyHint);
1752         XSetWMHints(xw.dpy, xw.win, h);
1753         XFree(h);
1754 }
1755
1756 void
1757 xbell(void)
1758 {
1759         if (!(IS_SET(MODE_FOCUSED)))
1760                 xseturgency(1);
1761         if (bellvolume)
1762                 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
1763 }
1764
1765 void
1766 focus(XEvent *ev)
1767 {
1768         XFocusChangeEvent *e = &ev->xfocus;
1769
1770         if (e->mode == NotifyGrab)
1771                 return;
1772
1773         if (ev->type == FocusIn) {
1774                 if (xw.ime.xic)
1775                         XSetICFocus(xw.ime.xic);
1776                 win.mode |= MODE_FOCUSED;
1777                 xseturgency(0);
1778                 if (IS_SET(MODE_FOCUS))
1779                         ttywrite("\033[I", 3, 0);
1780         } else {
1781                 if (xw.ime.xic)
1782                         XUnsetICFocus(xw.ime.xic);
1783                 win.mode &= ~MODE_FOCUSED;
1784                 if (IS_SET(MODE_FOCUS))
1785                         ttywrite("\033[O", 3, 0);
1786         }
1787 }
1788
1789 int
1790 match(uint mask, uint state)
1791 {
1792         return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
1793 }
1794
1795 char*
1796 kmap(KeySym k, uint state)
1797 {
1798         Key *kp;
1799         int i;
1800
1801         /* Check for mapped keys out of X11 function keys. */
1802         for (i = 0; i < LEN(mappedkeys); i++) {
1803                 if (mappedkeys[i] == k)
1804                         break;
1805         }
1806         if (i == LEN(mappedkeys)) {
1807                 if ((k & 0xFFFF) < 0xFD00)
1808                         return NULL;
1809         }
1810
1811         for (kp = key; kp < key + LEN(key); kp++) {
1812                 if (kp->k != k)
1813                         continue;
1814
1815                 if (!match(kp->mask, state))
1816                         continue;
1817
1818                 if (IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
1819                         continue;
1820                 if (IS_SET(MODE_NUMLOCK) && kp->appkey == 2)
1821                         continue;
1822
1823                 if (IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
1824                         continue;
1825
1826                 return kp->s;
1827         }
1828
1829         return NULL;
1830 }
1831
1832 void
1833 kpress(XEvent *ev)
1834 {
1835         XKeyEvent *e = &ev->xkey;
1836         KeySym ksym = NoSymbol;
1837         char buf[64], *customkey;
1838         int len;
1839         Rune c;
1840         Status status;
1841         Shortcut *bp;
1842
1843         if (IS_SET(MODE_KBDLOCK))
1844                 return;
1845
1846         if (xw.ime.xic) {
1847                 len = XmbLookupString(xw.ime.xic, e, buf, sizeof buf, &ksym, &status);
1848                 if (status == XBufferOverflow)
1849                         return;
1850         } else {
1851                 len = XLookupString(e, buf, sizeof buf, &ksym, NULL);
1852         }
1853         /* 1. shortcuts */
1854         for (bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
1855                 if (ksym == bp->keysym && match(bp->mod, e->state)) {
1856                         bp->func(&(bp->arg));
1857                         return;
1858                 }
1859         }
1860
1861         /* 2. custom keys from config.h */
1862         if ((customkey = kmap(ksym, e->state))) {
1863                 ttywrite(customkey, strlen(customkey), 1);
1864                 return;
1865         }
1866
1867         /* 3. composed string from input method */
1868         if (len == 0)
1869                 return;
1870         if (len == 1 && e->state & Mod1Mask) {
1871                 if (IS_SET(MODE_8BIT)) {
1872                         if (*buf < 0177) {
1873                                 c = *buf | 0x80;
1874                                 len = utf8encode(c, buf);
1875                         }
1876                 } else {
1877                         buf[1] = buf[0];
1878                         buf[0] = '\033';
1879                         len = 2;
1880                 }
1881         }
1882         ttywrite(buf, len, 1);
1883 }
1884
1885 void
1886 cmessage(XEvent *e)
1887 {
1888         /*
1889          * See xembed specs
1890          *  http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
1891          */
1892         if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
1893                 if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
1894                         win.mode |= MODE_FOCUSED;
1895                         xseturgency(0);
1896                 } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
1897                         win.mode &= ~MODE_FOCUSED;
1898                 }
1899         } else if (e->xclient.data.l[0] == xw.wmdeletewin) {
1900                 ttyhangup();
1901                 exit(0);
1902         }
1903 }
1904
1905 void
1906 resize(XEvent *e)
1907 {
1908         if (e->xconfigure.width == win.w && e->xconfigure.height == win.h)
1909                 return;
1910
1911         cresize(e->xconfigure.width, e->xconfigure.height);
1912 }
1913
1914 void
1915 run(void)
1916 {
1917         XEvent ev;
1918         int w = win.w, h = win.h;
1919         fd_set rfd;
1920         int xfd = XConnectionNumber(xw.dpy), ttyfd, xev, drawing;
1921         struct timespec seltv, *tv, now, lastblink, trigger;
1922         double timeout;
1923
1924         /* Waiting for window mapping */
1925         do {
1926                 XNextEvent(xw.dpy, &ev);
1927                 /*
1928                  * This XFilterEvent call is required because of XOpenIM. It
1929                  * does filter out the key event and some client message for
1930                  * the input method too.
1931                  */
1932                 if (XFilterEvent(&ev, None))
1933                         continue;
1934                 if (ev.type == ConfigureNotify) {
1935                         w = ev.xconfigure.width;
1936                         h = ev.xconfigure.height;
1937                 }
1938         } while (ev.type != MapNotify);
1939
1940         ttyfd = ttynew(opt_line, shell, opt_io, opt_cmd);
1941         cresize(w, h);
1942
1943         for (timeout = -1, drawing = 0, lastblink = (struct timespec){0};;) {
1944                 FD_ZERO(&rfd);
1945                 FD_SET(ttyfd, &rfd);
1946                 FD_SET(xfd, &rfd);
1947
1948                 if (XPending(xw.dpy))
1949                         timeout = 0;  /* existing events might not set xfd */
1950
1951                 seltv.tv_sec = timeout / 1E3;
1952                 seltv.tv_nsec = 1E6 * (timeout - 1E3 * seltv.tv_sec);
1953                 tv = timeout >= 0 ? &seltv : NULL;
1954
1955                 if (pselect(MAX(xfd, ttyfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
1956                         if (errno == EINTR)
1957                                 continue;
1958                         die("select failed: %s\n", strerror(errno));
1959                 }
1960                 clock_gettime(CLOCK_MONOTONIC, &now);
1961
1962                 if (FD_ISSET(ttyfd, &rfd))
1963                         ttyread();
1964
1965                 xev = 0;
1966                 while (XPending(xw.dpy)) {
1967                         xev = 1;
1968                         XNextEvent(xw.dpy, &ev);
1969                         if (XFilterEvent(&ev, None))
1970                                 continue;
1971                         if (handler[ev.type])
1972                                 (handler[ev.type])(&ev);
1973                 }
1974
1975                 /*
1976                  * To reduce flicker and tearing, when new content or event
1977                  * triggers drawing, we first wait a bit to ensure we got
1978                  * everything, and if nothing new arrives - we draw.
1979                  * We start with trying to wait minlatency ms. If more content
1980                  * arrives sooner, we retry with shorter and shorter periods,
1981                  * and eventually draw even without idle after maxlatency ms.
1982                  * Typically this results in low latency while interacting,
1983                  * maximum latency intervals during `cat huge.txt`, and perfect
1984                  * sync with periodic updates from animations/key-repeats/etc.
1985                  */
1986                 if (FD_ISSET(ttyfd, &rfd) || xev) {
1987                         if (!drawing) {
1988                                 trigger = now;
1989                                 drawing = 1;
1990                         }
1991                         timeout = (maxlatency - TIMEDIFF(now, trigger)) \
1992                                   / maxlatency * minlatency;
1993                         if (timeout > 0)
1994                                 continue;  /* we have time, try to find idle */
1995                 }
1996
1997                 /* idle detected or maxlatency exhausted -> draw */
1998                 timeout = -1;
1999                 if (blinktimeout && tattrset(ATTR_BLINK)) {
2000                         timeout = blinktimeout - TIMEDIFF(now, lastblink);
2001                         if (timeout <= 0) {
2002                                 if (-timeout > blinktimeout) /* start visible */
2003                                         win.mode |= MODE_BLINK;
2004                                 win.mode ^= MODE_BLINK;
2005                                 tsetdirtattr(ATTR_BLINK);
2006                                 lastblink = now;
2007                                 timeout = blinktimeout;
2008                         }
2009                 }
2010
2011                 draw();
2012                 XFlush(xw.dpy);
2013                 drawing = 0;
2014         }
2015 }
2016
2017 void
2018 usage(void)
2019 {
2020         die("usage: %s [-aiv] [-c class] [-f font] [-g geometry]"
2021             " [-n name] [-o file]\n"
2022             "          [-T title] [-t title] [-w windowid]"
2023             " [[-e] command [args ...]]\n"
2024             "       %s [-aiv] [-c class] [-f font] [-g geometry]"
2025             " [-n name] [-o file]\n"
2026             "          [-T title] [-t title] [-w windowid] -l line"
2027             " [stty_args ...]\n", argv0, argv0);
2028 }
2029
2030 int
2031 main(int argc, char *argv[])
2032 {
2033         xw.l = xw.t = 0;
2034         xw.isfixed = False;
2035         xsetcursor(cursorshape);
2036
2037         ARGBEGIN {
2038         case 'a':
2039                 allowaltscreen = 0;
2040                 break;
2041         case 'c':
2042                 opt_class = EARGF(usage());
2043                 break;
2044         case 'e':
2045                 if (argc > 0)
2046                         --argc, ++argv;
2047                 goto run;
2048         case 'f':
2049                 opt_font = EARGF(usage());
2050                 break;
2051         case 'g':
2052                 xw.gm = XParseGeometry(EARGF(usage()),
2053                                 &xw.l, &xw.t, &cols, &rows);
2054                 break;
2055         case 'i':
2056                 xw.isfixed = 1;
2057                 break;
2058         case 'o':
2059                 opt_io = EARGF(usage());
2060                 break;
2061         case 'l':
2062                 opt_line = EARGF(usage());
2063                 break;
2064         case 'n':
2065                 opt_name = EARGF(usage());
2066                 break;
2067         case 't':
2068         case 'T':
2069                 opt_title = EARGF(usage());
2070                 break;
2071         case 'w':
2072                 opt_embed = EARGF(usage());
2073                 break;
2074         case 'v':
2075                 die("%s " VERSION "\n", argv0);
2076                 break;
2077         default:
2078                 usage();
2079         } ARGEND;
2080
2081 run:
2082         if (argc > 0) /* eat all remaining arguments */
2083                 opt_cmd = argv;
2084
2085         if (!opt_title)
2086                 opt_title = (opt_line || !opt_cmd) ? "st" : opt_cmd[0];
2087
2088         setlocale(LC_CTYPE, "");
2089         XSetLocaleModifiers("");
2090         cols = MAX(cols, 1);
2091         rows = MAX(rows, 1);
2092         tnew(cols, rows);
2093         xinit(cols, rows);
2094         xsetenv();
2095         selinit();
2096         run();
2097
2098         return 0;
2099 }