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 #include "hb.h"
  23
  24 /* types used in config.h */
  25 typedef struct {
  26         uint mod;
  27         KeySym keysym;
  28         void (*func)(const Arg *);
  29         const Arg arg;
  30 } Shortcut;
  31
  32 typedef struct {
  33         uint mod;
  34         uint button;
  35         void (*func)(const Arg *);
  36         const Arg arg;
  37         uint  release;
  38 } MouseShortcut;
  39
  40 typedef struct {
  41         KeySym k;
  42         uint mask;
  43         char *s;
  44         /* three-valued logic variables: 0 indifferent, 1 on, -1 off */
  45         signed char appkey;    /* application keypad */
  46         signed char appcursor; /* application cursor */
  47 } Key;
  48
  49 /* X modifiers */
  50 #define XK_ANY_MOD    UINT_MAX
  51 #define XK_NO_MOD     0
  52 #define XK_SWITCH_MOD (1<<13)
  53
  54 /* function definitions used in config.h */
  55 static void clipcopy(const Arg *);
  56 static void clippaste(const Arg *);
  57 static void numlock(const Arg *);
  58 static void selpaste(const Arg *);
  59 static void zoom(const Arg *);
  60 static void zoomabs(const Arg *);
  61 static void zoomreset(const Arg *);
  62 static void ttysend(const Arg *);
  63
  64 /* config.h for applying patches and the configuration. */
  65 #include "config.h"
  66
  67 /* XEMBED messages */
  68 #define XEMBED_FOCUS_IN  4
  69 #define XEMBED_FOCUS_OUT 5
  70
  71 /* macros */
  72 #define IS_SET(flag)            ((win.mode & (flag)) != 0)
  73 #define TRUERED(x)              (((x) & 0xff0000) >> 8)
  74 #define TRUEGREEN(x)            (((x) & 0xff00))
  75 #define TRUEBLUE(x)             (((x) & 0xff) << 8)
  76
  77 typedef XftDraw *Draw;
  78 typedef XftColor Color;
  79 typedef XftGlyphFontSpec GlyphFontSpec;
  80
  81 /* Purely graphic info */
  82 typedef struct {
  83         int tw, th; /* tty width and height */
  84         int w, h; /* window width and height */
  85         int ch; /* char height */
  86         int cw; /* char width  */
  87         int mode; /* window state/mode flags */
  88         int cursor; /* cursor style */
  89 } TermWindow;
  90
  91 typedef struct {
  92         Display *dpy;
  93         Colormap cmap;
  94         Window win;
  95         Drawable buf;
  96         GlyphFontSpec *specbuf; /* font spec buffer used for rendering */
  97         Atom xembed, wmdeletewin, netwmname, netwmiconname, netwmpid;
  98         struct {
  99                 XIM xim;
 100                 XIC xic;
 101                 XPoint spot;
 102                 XVaNestedList spotlist;
 103         } ime;
 104         Draw draw;
 105         Visual *vis;
 106         XSetWindowAttributes attrs;
 107         int scr;
 108         int isfixed; /* is fixed geometry? */
 109         int l, t; /* left and top offset */
 110         int gm; /* geometry mask */
 111 } XWindow;
 112
 113 typedef struct {
 114         Atom xtarget;
 115         char *primary, *clipboard;
 116         struct timespec tclick1;
 117         struct timespec tclick2;
 118 } XSelection;
 119
 120 /* Font structure */
 121 #define Font Font_
 122 typedef struct {
 123         int height;
 124         int width;
 125         int ascent;
 126         int descent;
 127         int badslant;
 128         int badweight;
 129         short lbearing;
 130         short rbearing;
 131         XftFont *match;
 132         FcFontSet *set;
 133         FcPattern *pattern;
 134 } Font;
 135
 136 /* Drawing Context */
 137 typedef struct {
 138         Color *col;
 139         size_t collen;
 140         Font font, bfont, ifont, ibfont;
 141         GC gc;
 142 } DC;
 143
 144 static inline ushort sixd_to_16bit(int);
 145 static int xmakeglyphfontspecs(XftGlyphFontSpec *, const Glyph *, int, int, int);
 146 static void xdrawglyphfontspecs(const XftGlyphFontSpec *, Glyph, int, int, int);
 147 static void xdrawglyph(Glyph, int, int);
 148 static void xclear(int, int, int, int);
 149 static int xgeommasktogravity(int);
 150 static int ximopen(Display *);
 151 static void ximinstantiate(Display *, XPointer, XPointer);
 152 static void ximdestroy(XIM, XPointer, XPointer);
 153 static int xicdestroy(XIC, XPointer, XPointer);
 154 static void xinit(int, int);
 155 static void cresize(int, int);
 156 static void xresize(int, int);
 157 static void xhints(void);
 158 static int xloadcolor(int, const char *, Color *);
 159 static int xloadfont(Font *, FcPattern *);
 160 static void xloadfonts(const char *, double);
 161 static void xunloadfont(Font *);
 162 static void xunloadfonts(void);
 163 static void xsetenv(void);
 164 static void xseturgency(int);
 165 static int evcol(XEvent *);
 166 static int evrow(XEvent *);
 167
 168 static void expose(XEvent *);
 169 static void visibility(XEvent *);
 170 static void unmap(XEvent *);
 171 static void kpress(XEvent *);
 172 static void cmessage(XEvent *);
 173 static void resize(XEvent *);
 174 static void focus(XEvent *);
 175 static uint buttonmask(uint);
 176 static int mouseaction(XEvent *, uint);
 177 static void brelease(XEvent *);
 178 static void bpress(XEvent *);
 179 static void bmotion(XEvent *);
 180 static void propnotify(XEvent *);
 181 static void selnotify(XEvent *);
 182 static void selclear_(XEvent *);
 183 static void selrequest(XEvent *);
 184 static void setsel(char *, Time);
 185 static void mousesel(XEvent *, int);
 186 static void mousereport(XEvent *);
 187 static char *kmap(KeySym, uint);
 188 static int match(uint, uint);
 189
 190 static void run(void);
 191 static void usage(void);
 192
 193 static void (*handler[LASTEvent])(XEvent *) = {
 194         [KeyPress] = kpress,
 195         [ClientMessage] = cmessage,
 196         [ConfigureNotify] = resize,
 197         [VisibilityNotify] = visibility,
 198         [UnmapNotify] = unmap,
 199         [Expose] = expose,
 200         [FocusIn] = focus,
 201         [FocusOut] = focus,
 202         [MotionNotify] = bmotion,
 203         [ButtonPress] = bpress,
 204         [ButtonRelease] = brelease,
 205 /*
 206  * Uncomment if you want the selection to disappear when you select something
 207  * different in another window.
 208  */
 209 /*      [SelectionClear] = selclear_, */
 210         [SelectionNotify] = selnotify,
 211 /*
 212  * PropertyNotify is only turned on when there is some INCR transfer happening
 213  * for the selection retrieval.
 214  */
 215         [PropertyNotify] = propnotify,
 216         [SelectionRequest] = selrequest,
 217 };
 218
 219 /* Globals */
 220 static DC dc;
 221 static XWindow xw;
 222 static XSelection xsel;
 223 static TermWindow win;
 224
 225 /* Font Ring Cache */
 226 enum {
 227         FRC_NORMAL,
 228         FRC_ITALIC,
 229         FRC_BOLD,
 230         FRC_ITALICBOLD
 231 };
 232
 233 typedef struct {
 234         XftFont *font;
 235         int flags;
 236         Rune unicodep;
 237 } Fontcache;
 238
 239 /* Fontcache is an array now. A new font will be appended to the array. */
 240 static Fontcache *frc = NULL;
 241 static int frclen = 0;
 242 static int frccap = 0;
 243 static char *usedfont = NULL;
 244 static double usedfontsize = 0;
 245 static double defaultfontsize = 0;
 246
 247 static char *opt_class = NULL;
 248 static char **opt_cmd  = NULL;
 249 static char *opt_embed = NULL;
 250 static char *opt_font  = NULL;
 251 static char *opt_io    = NULL;
 252 static char *opt_line  = NULL;
 253 static char *opt_name  = NULL;
 254 static char *opt_title = NULL;
 255
 256 static int oldbutton = 3; /* button event on startup: 3 = release */
 257 static int cursorblinks = 0;
 258
 259 void
 260 clipcopy(const Arg *dummy)
 261 {
 262         Atom clipboard;
 263
 264         free(xsel.clipboard);
 265         xsel.clipboard = NULL;
 266
 267         if (xsel.primary != NULL) {
 268                 xsel.clipboard = xstrdup(xsel.primary);
 269                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 270                 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
 271         }
 272 }
 273
 274 void
 275 clippaste(const Arg *dummy)
 276 {
 277         Atom clipboard;
 278
 279         clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 280         XConvertSelection(xw.dpy, clipboard, xsel.xtarget, clipboard,
 281                         xw.win, CurrentTime);
 282 }
 283
 284 void
 285 selpaste(const Arg *dummy)
 286 {
 287         XConvertSelection(xw.dpy, XA_PRIMARY, xsel.xtarget, XA_PRIMARY,
 288                         xw.win, CurrentTime);
 289 }
 290
 291 void
 292 numlock(const Arg *dummy)
 293 {
 294         win.mode ^= MODE_NUMLOCK;
 295 }
 296
 297 void
 298 zoom(const Arg *arg)
 299 {
 300         Arg larg;
 301
 302         larg.f = usedfontsize + arg->f;
 303         zoomabs(&larg);
 304 }
 305
 306 void
 307 zoomabs(const Arg *arg)
 308 {
 309         xunloadfonts();
 310         xloadfonts(usedfont, arg->f);
 311         cresize(0, 0);
 312         redraw();
 313         xhints();
 314 }
 315
 316 void
 317 zoomreset(const Arg *arg)
 318 {
 319         Arg larg;
 320
 321         if (defaultfontsize > 0) {
 322                 larg.f = defaultfontsize;
 323                 zoomabs(&larg);
 324         }
 325 }
 326
 327 void
 328 ttysend(const Arg *arg)
 329 {
 330         ttywrite(arg->s, strlen(arg->s), 1);
 331 }
 332
 333 int
 334 evcol(XEvent *e)
 335 {
 336         int x = e->xbutton.x - borderpx;
 337         LIMIT(x, 0, win.tw - 1);
 338         return x / win.cw;
 339 }
 340
 341 int
 342 evrow(XEvent *e)
 343 {
 344         int y = e->xbutton.y - borderpx;
 345         LIMIT(y, 0, win.th - 1);
 346         return y / win.ch;
 347 }
 348
 349 void
 350 mousesel(XEvent *e, int done)
 351 {
 352         int type, seltype = SEL_REGULAR;
 353         uint state = e->xbutton.state & ~(Button1Mask | forcemousemod);
 354
 355         for (type = 1; type < LEN(selmasks); ++type) {
 356                 if (match(selmasks[type], state)) {
 357                         seltype = type;
 358                         break;
 359                 }
 360         }
 361         selextend(evcol(e), evrow(e), seltype, done);
 362         if (done)
 363                 setsel(getsel(), e->xbutton.time);
 364 }
 365
 366 void
 367 mousereport(XEvent *e)
 368 {
 369         int len, x = evcol(e), y = evrow(e),
 370             button = e->xbutton.button, state = e->xbutton.state;
 371         char buf[40];
 372         static int ox, oy;
 373
 374         /* from urxvt */
 375         if (e->xbutton.type == MotionNotify) {
 376                 if (x == ox && y == oy)
 377                         return;
 378                 if (!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
 379                         return;
 380                 /* MOUSE_MOTION: no reporting if no button is pressed */
 381                 if (IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
 382                         return;
 383
 384                 button = oldbutton + 32;
 385                 ox = x;
 386                 oy = y;
 387         } else {
 388                 if (!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
 389                         button = 3;
 390                 } else {
 391                         button -= Button1;
 392                         if (button >= 7)
 393                                 button += 128 - 7;
 394                         else if (button >= 3)
 395                                 button += 64 - 3;
 396                 }
 397                 if (e->xbutton.type == ButtonPress) {
 398                         oldbutton = button;
 399                         ox = x;
 400                         oy = y;
 401                 } else if (e->xbutton.type == ButtonRelease) {
 402                         oldbutton = 3;
 403                         /* MODE_MOUSEX10: no button release reporting */
 404                         if (IS_SET(MODE_MOUSEX10))
 405                                 return;
 406                         if (button == 64 || button == 65)
 407                                 return;
 408                 }
 409         }
 410
 411         if (!IS_SET(MODE_MOUSEX10)) {
 412                 button += ((state & ShiftMask  ) ? 4  : 0)
 413                         + ((state & Mod4Mask   ) ? 8  : 0)
 414                         + ((state & ControlMask) ? 16 : 0);
 415         }
 416
 417         if (IS_SET(MODE_MOUSESGR)) {
 418                 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
 419                                 button, x+1, y+1,
 420                                 e->xbutton.type == ButtonRelease ? 'm' : 'M');
 421         } else if (x < 223 && y < 223) {
 422                 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
 423                                 32+button, 32+x+1, 32+y+1);
 424         } else {
 425                 return;
 426         }
 427
 428         ttywrite(buf, len, 0);
 429 }
 430
 431 uint
 432 buttonmask(uint button)
 433 {
 434         return button == Button1 ? Button1Mask
 435              : button == Button2 ? Button2Mask
 436              : button == Button3 ? Button3Mask
 437              : button == Button4 ? Button4Mask
 438              : button == Button5 ? Button5Mask
 439              : 0;
 440 }
 441
 442 int
 443 mouseaction(XEvent *e, uint release)
 444 {
 445         MouseShortcut *ms;
 446
 447         /* ignore Button<N>mask for Button<N> - it's set on release */
 448         uint state = e->xbutton.state & ~buttonmask(e->xbutton.button);
 449
 450         for (ms = mshortcuts; ms < mshortcuts + LEN(mshortcuts); ms++) {
 451                 if (ms->release == release &&
 452                     ms->button == e->xbutton.button &&
 453                     (match(ms->mod, state) ||  /* exact or forced */
 454                      match(ms->mod, state & ~forcemousemod))) {
 455                         ms->func(&(ms->arg));
 456                         return 1;
 457                 }
 458         }
 459
 460         return 0;
 461 }
 462
 463 void
 464 bpress(XEvent *e)
 465 {
 466         struct timespec now;
 467         int snap;
 468
 469         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forcemousemod)) {
 470                 mousereport(e);
 471                 return;
 472         }
 473
 474         if (mouseaction(e, 0))
 475                 return;
 476
 477         if (e->xbutton.button == Button1) {
 478                 /*
 479                  * If the user clicks below predefined timeouts specific
 480                  * snapping behaviour is exposed.
 481                  */
 482                 clock_gettime(CLOCK_MONOTONIC, &now);
 483                 if (TIMEDIFF(now, xsel.tclick2) <= tripleclicktimeout) {
 484                         snap = SNAP_LINE;
 485                 } else if (TIMEDIFF(now, xsel.tclick1) <= doubleclicktimeout) {
 486                         snap = SNAP_WORD;
 487                 } else {
 488                         snap = 0;
 489                 }
 490                 xsel.tclick2 = xsel.tclick1;
 491                 xsel.tclick1 = now;
 492
 493                 selstart(evcol(e), evrow(e), snap);
 494         }
 495 }
 496
 497 void
 498 propnotify(XEvent *e)
 499 {
 500         XPropertyEvent *xpev;
 501         Atom clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 502
 503         xpev = &e->xproperty;
 504         if (xpev->state == PropertyNewValue &&
 505                         (xpev->atom == XA_PRIMARY ||
 506                          xpev->atom == clipboard)) {
 507                 selnotify(e);
 508         }
 509 }
 510
 511 void
 512 selnotify(XEvent *e)
 513 {
 514         ulong nitems, ofs, rem;
 515         int format;
 516         uchar *data, *last, *repl;
 517         Atom type, incratom, property = None;
 518
 519         incratom = XInternAtom(xw.dpy, "INCR", 0);
 520
 521         ofs = 0;
 522         if (e->type == SelectionNotify)
 523                 property = e->xselection.property;
 524         else if (e->type == PropertyNotify)
 525                 property = e->xproperty.atom;
 526
 527         if (property == None)
 528                 return;
 529
 530         do {
 531                 if (XGetWindowProperty(xw.dpy, xw.win, property, ofs,
 532                                         BUFSIZ/4, False, AnyPropertyType,
 533                                         &type, &format, &nitems, &rem,
 534                                         &data)) {
 535                         fprintf(stderr, "Clipboard allocation failed\n");
 536                         return;
 537                 }
 538
 539                 if (e->type == PropertyNotify && nitems == 0 && rem == 0) {
 540                         /*
 541                          * If there is some PropertyNotify with no data, then
 542                          * this is the signal of the selection owner that all
 543                          * data has been transferred. We won't need to receive
 544                          * PropertyNotify events anymore.
 545                          */
 546                         MODBIT(xw.attrs.event_mask, 0, PropertyChangeMask);
 547                         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
 548                                         &xw.attrs);
 549                 }
 550
 551                 if (type == incratom) {
 552                         /*
 553                          * Activate the PropertyNotify events so we receive
 554                          * when the selection owner does send us the next
 555                          * chunk of data.
 556                          */
 557                         MODBIT(xw.attrs.event_mask, 1, PropertyChangeMask);
 558                         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
 559                                         &xw.attrs);
 560
 561                         /*
 562                          * Deleting the property is the transfer start signal.
 563                          */
 564                         XDeleteProperty(xw.dpy, xw.win, (int)property);
 565                         continue;
 566                 }
 567
 568                 /*
 569                  * As seen in getsel:
 570                  * Line endings are inconsistent in the terminal and GUI world
 571                  * copy and pasting. When receiving some selection data,
 572                  * replace all '\n' with '\r'.
 573                  * FIXME: Fix the computer world.
 574                  */
 575                 repl = data;
 576                 last = data + nitems * format / 8;
 577                 while ((repl = memchr(repl, '\n', last - repl))) {
 578                         *repl++ = '\r';
 579                 }
 580
 581                 if (IS_SET(MODE_BRCKTPASTE) && ofs == 0)
 582                         ttywrite("\033[200~", 6, 0);
 583                 ttywrite((char *)data, nitems * format / 8, 1);
 584                 if (IS_SET(MODE_BRCKTPASTE) && rem == 0)
 585                         ttywrite("\033[201~", 6, 0);
 586                 XFree(data);
 587                 /* number of 32-bit chunks returned */
 588                 ofs += nitems * format / 32;
 589         } while (rem > 0);
 590
 591         /*
 592          * Deleting the property again tells the selection owner to send the
 593          * next data chunk in the property.
 594          */
 595         XDeleteProperty(xw.dpy, xw.win, (int)property);
 596 }
 597
 598 void
 599 xclipcopy(void)
 600 {
 601         clipcopy(NULL);
 602 }
 603
 604 void
 605 selclear_(XEvent *e)
 606 {
 607         selclear();
 608 }
 609
 610 void
 611 selrequest(XEvent *e)
 612 {
 613         XSelectionRequestEvent *xsre;
 614         XSelectionEvent xev;
 615         Atom xa_targets, string, clipboard;
 616         char *seltext;
 617
 618         xsre = (XSelectionRequestEvent *) e;
 619         xev.type = SelectionNotify;
 620         xev.requestor = xsre->requestor;
 621         xev.selection = xsre->selection;
 622         xev.target = xsre->target;
 623         xev.time = xsre->time;
 624         if (xsre->property == None)
 625                 xsre->property = xsre->target;
 626
 627         /* reject */
 628         xev.property = None;
 629
 630         xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
 631         if (xsre->target == xa_targets) {
 632                 /* respond with the supported type */
 633                 string = xsel.xtarget;
 634                 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
 635                                 XA_ATOM, 32, PropModeReplace,
 636                                 (uchar *) &string, 1);
 637                 xev.property = xsre->property;
 638         } else if (xsre->target == xsel.xtarget || xsre->target == XA_STRING) {
 639                 /*
 640                  * xith XA_STRING non ascii characters may be incorrect in the
 641                  * requestor. It is not our problem, use utf8.
 642                  */
 643                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 644                 if (xsre->selection == XA_PRIMARY) {
 645                         seltext = xsel.primary;
 646                 } else if (xsre->selection == clipboard) {
 647                         seltext = xsel.clipboard;
 648                 } else {
 649                         fprintf(stderr,
 650                                 "Unhandled clipboard selection 0x%lx\n",
 651                                 xsre->selection);
 652                         return;
 653                 }
 654                 if (seltext != NULL) {
 655                         XChangeProperty(xsre->display, xsre->requestor,
 656                                         xsre->property, xsre->target,
 657                                         8, PropModeReplace,
 658                                         (uchar *)seltext, strlen(seltext));
 659                         xev.property = xsre->property;
 660                 }
 661         }
 662
 663         /* all done, send a notification to the listener */
 664         if (!XSendEvent(xsre->display, xsre->requestor, 1, 0, (XEvent *) &xev))
 665                 fprintf(stderr, "Error sending SelectionNotify event\n");
 666 }
 667
 668 void
 669 setsel(char *str, Time t)
 670 {
 671         if (!str)
 672                 return;
 673
 674         free(xsel.primary);
 675         xsel.primary = str;
 676
 677         XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
 678         if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
 679                 selclear();
 680 }
 681
 682 void
 683 xsetsel(char *str)
 684 {
 685         setsel(str, CurrentTime);
 686 }
 687
 688 void
 689 brelease(XEvent *e)
 690 {
 691         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forcemousemod)) {
 692                 mousereport(e);
 693                 return;
 694         }
 695
 696         if (mouseaction(e, 1))
 697                 return;
 698         if (e->xbutton.button == Button1)
 699                 mousesel(e, 1);
 700 }
 701
 702 void
 703 bmotion(XEvent *e)
 704 {
 705         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forcemousemod)) {
 706                 mousereport(e);
 707                 return;
 708         }
 709
 710         mousesel(e, 0);
 711 }
 712
 713 void
 714 cresize(int width, int height)
 715 {
 716         int col, row;
 717
 718         if (width != 0)
 719                 win.w = width;
 720         if (height != 0)
 721                 win.h = height;
 722
 723         col = (win.w - 2 * borderpx) / win.cw;
 724         row = (win.h - 2 * borderpx) / win.ch;
 725         col = MAX(1, col);
 726         row = MAX(1, row);
 727
 728         tresize(col, row);
 729         xresize(col, row);
 730         ttyresize(win.tw, win.th);
 731 }
 732
 733 void
 734 xresize(int col, int row)
 735 {
 736         win.tw = col * win.cw;
 737         win.th = row * win.ch;
 738
 739         XFreePixmap(xw.dpy, xw.buf);
 740         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
 741                         DefaultDepth(xw.dpy, xw.scr));
 742         XftDrawChange(xw.draw, xw.buf);
 743         xclear(0, 0, win.w, win.h);
 744
 745         /* resize to new width */
 746         xw.specbuf = xrealloc(xw.specbuf, col * sizeof(GlyphFontSpec));
 747 }
 748
 749 ushort
 750 sixd_to_16bit(int x)
 751 {
 752         return x == 0 ? 0 : 0x3737 + 0x2828 * x;
 753 }
 754
 755 int
 756 xloadcolor(int i, const char *name, Color *ncolor)
 757 {
 758         XRenderColor color = { .alpha = 0xffff };
 759
 760         if (!name) {
 761                 if (BETWEEN(i, 16, 255)) { /* 256 color */
 762                         if (i < 6*6*6+16) { /* same colors as xterm */
 763                                 color.red   = sixd_to_16bit( ((i-16)/36)%6 );
 764                                 color.green = sixd_to_16bit( ((i-16)/6) %6 );
 765                                 color.blue  = sixd_to_16bit( ((i-16)/1) %6 );
 766                         } else { /* greyscale */
 767                                 color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
 768                                 color.green = color.blue = color.red;
 769                         }
 770                         return XftColorAllocValue(xw.dpy, xw.vis,
 771                                                   xw.cmap, &color, ncolor);
 772                 } else
 773                         name = colorname[i];
 774         }
 775
 776         return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
 777 }
 778
 779 void
 780 xloadcols(void)
 781 {
 782         int i;
 783         static int loaded;
 784         Color *cp;
 785
 786         if (loaded) {
 787                 for (cp = dc.col; cp < &dc.col[dc.collen]; ++cp)
 788                         XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
 789         } else {
 790                 dc.collen = MAX(LEN(colorname), 256);
 791                 dc.col = xmalloc(dc.collen * sizeof(Color));
 792         }
 793
 794         for (i = 0; i < dc.collen; i++)
 795                 if (!xloadcolor(i, NULL, &dc.col[i])) {
 796                         if (colorname[i])
 797                                 die("could not allocate color '%s'\n", colorname[i]);
 798                         else
 799                                 die("could not allocate color %d\n", i);
 800                 }
 801         loaded = 1;
 802 }
 803
 804 int
 805 xsetcolorname(int x, const char *name)
 806 {
 807         Color ncolor;
 808
 809         if (!BETWEEN(x, 0, dc.collen))
 810                 return 1;
 811
 812         if (!xloadcolor(x, name, &ncolor))
 813                 return 1;
 814
 815         XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
 816         dc.col[x] = ncolor;
 817
 818         return 0;
 819 }
 820
 821 /*
 822  * Absolute coordinates.
 823  */
 824 void
 825 xclear(int x1, int y1, int x2, int y2)
 826 {
 827         XftDrawRect(xw.draw,
 828                         &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
 829                         x1, y1, x2-x1, y2-y1);
 830 }
 831
 832 void
 833 xhints(void)
 834 {
 835         XClassHint class = {opt_name ? opt_name : termname,
 836                             opt_class ? opt_class : termname};
 837         XWMHints wm = {.flags = InputHint, .input = 1};
 838         XSizeHints *sizeh;
 839
 840         sizeh = XAllocSizeHints();
 841
 842         sizeh->flags = PSize | PResizeInc | PBaseSize | PMinSize;
 843         sizeh->height = win.h;
 844         sizeh->width = win.w;
 845         sizeh->height_inc = win.ch;
 846         sizeh->width_inc = win.cw;
 847         sizeh->base_height = 2 * borderpx;
 848         sizeh->base_width = 2 * borderpx;
 849         sizeh->min_height = win.ch + 2 * borderpx;
 850         sizeh->min_width = win.cw + 2 * borderpx;
 851         if (xw.isfixed) {
 852                 sizeh->flags |= PMaxSize;
 853                 sizeh->min_width = sizeh->max_width = win.w;
 854                 sizeh->min_height = sizeh->max_height = win.h;
 855         }
 856         if (xw.gm & (XValue|YValue)) {
 857                 sizeh->flags |= USPosition | PWinGravity;
 858                 sizeh->x = xw.l;
 859                 sizeh->y = xw.t;
 860                 sizeh->win_gravity = xgeommasktogravity(xw.gm);
 861         }
 862
 863         XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
 864                         &class);
 865         XFree(sizeh);
 866 }
 867
 868 int
 869 xgeommasktogravity(int mask)
 870 {
 871         switch (mask & (XNegative|YNegative)) {
 872         case 0:
 873                 return NorthWestGravity;
 874         case XNegative:
 875                 return NorthEastGravity;
 876         case YNegative:
 877                 return SouthWestGravity;
 878         }
 879
 880         return SouthEastGravity;
 881 }
 882
 883 int
 884 xloadfont(Font *f, FcPattern *pattern)
 885 {
 886         FcPattern *configured;
 887         FcPattern *match;
 888         FcResult result;
 889         XGlyphInfo extents;
 890         int wantattr, haveattr;
 891
 892         /*
 893          * Manually configure instead of calling XftMatchFont
 894          * so that we can use the configured pattern for
 895          * "missing glyph" lookups.
 896          */
 897         configured = FcPatternDuplicate(pattern);
 898         if (!configured)
 899                 return 1;
 900
 901         FcConfigSubstitute(NULL, configured, FcMatchPattern);
 902         XftDefaultSubstitute(xw.dpy, xw.scr, configured);
 903
 904         match = FcFontMatch(NULL, configured, &result);
 905         if (!match) {
 906                 FcPatternDestroy(configured);
 907                 return 1;
 908         }
 909
 910         if (!(f->match = XftFontOpenPattern(xw.dpy, match))) {
 911                 FcPatternDestroy(configured);
 912                 FcPatternDestroy(match);
 913                 return 1;
 914         }
 915
 916         if ((XftPatternGetInteger(pattern, "slant", 0, &wantattr) ==
 917             XftResultMatch)) {
 918                 /*
 919                  * Check if xft was unable to find a font with the appropriate
 920                  * slant but gave us one anyway. Try to mitigate.
 921                  */
 922                 if ((XftPatternGetInteger(f->match->pattern, "slant", 0,
 923                     &haveattr) != XftResultMatch) || haveattr < wantattr) {
 924                         f->badslant = 1;
 925                         fputs("font slant does not match\n", stderr);
 926                 }
 927         }
 928
 929         if ((XftPatternGetInteger(pattern, "weight", 0, &wantattr) ==
 930             XftResultMatch)) {
 931                 if ((XftPatternGetInteger(f->match->pattern, "weight", 0,
 932                     &haveattr) != XftResultMatch) || haveattr != wantattr) {
 933                         f->badweight = 1;
 934                         fputs("font weight does not match\n", stderr);
 935                 }
 936         }
 937
 938         XftTextExtentsUtf8(xw.dpy, f->match,
 939                 (const FcChar8 *) ascii_printable,
 940                 strlen(ascii_printable), &extents);
 941
 942         f->set = NULL;
 943         f->pattern = configured;
 944
 945         f->ascent = f->match->ascent;
 946         f->descent = f->match->descent;
 947         f->lbearing = 0;
 948         f->rbearing = f->match->max_advance_width;
 949
 950         f->height = f->ascent + f->descent;
 951         f->width = DIVCEIL(extents.xOff, strlen(ascii_printable));
 952
 953         return 0;
 954 }
 955
 956 void
 957 xloadfonts(const char *fontstr, double fontsize)
 958 {
 959         FcPattern *pattern;
 960         double fontval;
 961
 962         if (fontstr[0] == '-')
 963                 pattern = XftXlfdParse(fontstr, False, False);
 964         else
 965                 pattern = FcNameParse((const FcChar8 *)fontstr);
 966
 967         if (!pattern)
 968                 die("can't open font %s\n", fontstr);
 969
 970         if (fontsize > 1) {
 971                 FcPatternDel(pattern, FC_PIXEL_SIZE);
 972                 FcPatternDel(pattern, FC_SIZE);
 973                 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
 974                 usedfontsize = fontsize;
 975         } else {
 976                 if (FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval) ==
 977                                 FcResultMatch) {
 978                         usedfontsize = fontval;
 979                 } else if (FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval) ==
 980                                 FcResultMatch) {
 981                         usedfontsize = -1;
 982                 } else {
 983                         /*
 984                          * Default font size is 12, if none given. This is to
 985                          * have a known usedfontsize value.
 986                          */
 987                         FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
 988                         usedfontsize = 12;
 989                 }
 990                 defaultfontsize = usedfontsize;
 991         }
 992
 993         if (xloadfont(&dc.font, pattern))
 994                 die("can't open font %s\n", fontstr);
 995
 996         if (usedfontsize < 0) {
 997                 FcPatternGetDouble(dc.font.match->pattern,
 998                                    FC_PIXEL_SIZE, 0, &fontval);
 999                 usedfontsize = fontval;
1000                 if (fontsize == 0)
1001                         defaultfontsize = fontval;
1002         }
1003
1004         /* Setting character width and height. */
1005         win.cw = ceilf(dc.font.width * cwscale);
1006         win.ch = ceilf(dc.font.height * chscale);
1007
1008         FcPatternDel(pattern, FC_SLANT);
1009         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
1010         if (xloadfont(&dc.ifont, pattern))
1011                 die("can't open font %s\n", fontstr);
1012
1013         FcPatternDel(pattern, FC_WEIGHT);
1014         FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
1015         if (xloadfont(&dc.ibfont, pattern))
1016                 die("can't open font %s\n", fontstr);
1017
1018         FcPatternDel(pattern, FC_SLANT);
1019         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
1020         if (xloadfont(&dc.bfont, pattern))
1021                 die("can't open font %s\n", fontstr);
1022
1023         FcPatternDestroy(pattern);
1024 }
1025
1026 void
1027 xunloadfont(Font *f)
1028 {
1029         XftFontClose(xw.dpy, f->match);
1030         FcPatternDestroy(f->pattern);
1031         if (f->set)
1032                 FcFontSetDestroy(f->set);
1033 }
1034
1035 void
1036 xunloadfonts(void)
1037 {
1038         /* Clear Harfbuzz font cache. */
1039         hbunloadfonts();
1040
1041         /* Free the loaded fonts in the font cache.  */
1042         while (frclen > 0)
1043                 XftFontClose(xw.dpy, frc[--frclen].font);
1044
1045         xunloadfont(&dc.font);
1046         xunloadfont(&dc.bfont);
1047         xunloadfont(&dc.ifont);
1048         xunloadfont(&dc.ibfont);
1049 }
1050
1051 int
1052 ximopen(Display *dpy)
1053 {
1054         XIMCallback imdestroy = { .client_data = NULL, .callback = ximdestroy };
1055         XICCallback icdestroy = { .client_data = NULL, .callback = xicdestroy };
1056
1057         xw.ime.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
1058         if (xw.ime.xim == NULL)
1059                 return 0;
1060
1061         if (XSetIMValues(xw.ime.xim, XNDestroyCallback, &imdestroy, NULL))
1062                 fprintf(stderr, "XSetIMValues: "
1063                                 "Could not set XNDestroyCallback.\n");
1064
1065         xw.ime.spotlist = XVaCreateNestedList(0, XNSpotLocation, &xw.ime.spot,
1066                                               NULL);
1067
1068         if (xw.ime.xic == NULL) {
1069                 xw.ime.xic = XCreateIC(xw.ime.xim, XNInputStyle,
1070                                        XIMPreeditNothing | XIMStatusNothing,
1071                                        XNClientWindow, xw.win,
1072                                        XNDestroyCallback, &icdestroy,
1073                                        NULL);
1074         }
1075         if (xw.ime.xic == NULL)
1076                 fprintf(stderr, "XCreateIC: Could not create input context.\n");
1077
1078         return 1;
1079 }
1080
1081 void
1082 ximinstantiate(Display *dpy, XPointer client, XPointer call)
1083 {
1084         if (ximopen(dpy))
1085                 XUnregisterIMInstantiateCallback(xw.dpy, NULL, NULL, NULL,
1086                                                  ximinstantiate, NULL);
1087 }
1088
1089 void
1090 ximdestroy(XIM xim, XPointer client, XPointer call)
1091 {
1092         xw.ime.xim = NULL;
1093         XRegisterIMInstantiateCallback(xw.dpy, NULL, NULL, NULL,
1094                                        ximinstantiate, NULL);
1095         XFree(xw.ime.spotlist);
1096 }
1097
1098 int
1099 xicdestroy(XIC xim, XPointer client, XPointer call)
1100 {
1101         xw.ime.xic = NULL;
1102         return 1;
1103 }
1104
1105 void
1106 xinit(int cols, int rows)
1107 {
1108         XGCValues gcvalues;
1109         Cursor cursor;
1110         Window parent;
1111         pid_t thispid = getpid();
1112         XColor xmousefg, xmousebg;
1113
1114         if (!(xw.dpy = XOpenDisplay(NULL)))
1115                 die("can't open display\n");
1116         xw.scr = XDefaultScreen(xw.dpy);
1117         xw.vis = XDefaultVisual(xw.dpy, xw.scr);
1118
1119         /* font */
1120         if (!FcInit())
1121                 die("could not init fontconfig.\n");
1122
1123         usedfont = (opt_font == NULL)? font : opt_font;
1124         xloadfonts(usedfont, 0);
1125
1126         /* colors */
1127         xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1128         xloadcols();
1129
1130         /* adjust fixed window geometry */
1131         win.w = 2 * borderpx + cols * win.cw;
1132         win.h = 2 * borderpx + rows * win.ch;
1133         if (xw.gm & XNegative)
1134                 xw.l += DisplayWidth(xw.dpy, xw.scr) - win.w - 2;
1135         if (xw.gm & YNegative)
1136                 xw.t += DisplayHeight(xw.dpy, xw.scr) - win.h - 2;
1137
1138         /* Events */
1139         xw.attrs.background_pixel = dc.col[defaultbg].pixel;
1140         xw.attrs.border_pixel = dc.col[defaultbg].pixel;
1141         xw.attrs.bit_gravity = NorthWestGravity;
1142         xw.attrs.event_mask = FocusChangeMask | KeyPressMask | KeyReleaseMask
1143                 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1144                 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
1145         xw.attrs.colormap = xw.cmap;
1146
1147         if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
1148                 parent = XRootWindow(xw.dpy, xw.scr);
1149         xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
1150                         win.w, win.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
1151                         xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
1152                         | CWEventMask | CWColormap, &xw.attrs);
1153
1154         memset(&gcvalues, 0, sizeof(gcvalues));
1155         gcvalues.graphics_exposures = False;
1156         dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
1157                         &gcvalues);
1158         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
1159                         DefaultDepth(xw.dpy, xw.scr));
1160         XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
1161         XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, win.w, win.h);
1162
1163         /* font spec buffer */
1164         xw.specbuf = xmalloc(cols * sizeof(GlyphFontSpec));
1165
1166         /* Xft rendering context */
1167         xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
1168
1169         /* input methods */
1170         if (!ximopen(xw.dpy)) {
1171                 XRegisterIMInstantiateCallback(xw.dpy, NULL, NULL, NULL,
1172                                                ximinstantiate, NULL);
1173         }
1174
1175         /* white cursor, black outline */
1176         cursor = XCreateFontCursor(xw.dpy, mouseshape);
1177         XDefineCursor(xw.dpy, xw.win, cursor);
1178
1179         if (XParseColor(xw.dpy, xw.cmap, colorname[mousefg], &xmousefg) == 0) {
1180                 xmousefg.red   = 0xffff;
1181                 xmousefg.green = 0xffff;
1182                 xmousefg.blue  = 0xffff;
1183         }
1184
1185         if (XParseColor(xw.dpy, xw.cmap, colorname[mousebg], &xmousebg) == 0) {
1186                 xmousebg.red   = 0x0000;
1187                 xmousebg.green = 0x0000;
1188                 xmousebg.blue  = 0x0000;
1189         }
1190
1191         XRecolorCursor(xw.dpy, cursor, &xmousefg, &xmousebg);
1192
1193         xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
1194         xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
1195         xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
1196         xw.netwmiconname = XInternAtom(xw.dpy, "_NET_WM_ICON_NAME", False);
1197         XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
1198
1199         xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
1200         XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
1201                         PropModeReplace, (uchar *)&thispid, 1);
1202
1203         win.mode = MODE_NUMLOCK;
1204         resettitle();
1205         xhints();
1206         XMapWindow(xw.dpy, xw.win);
1207         XSync(xw.dpy, False);
1208
1209         clock_gettime(CLOCK_MONOTONIC, &xsel.tclick1);
1210         clock_gettime(CLOCK_MONOTONIC, &xsel.tclick2);
1211         xsel.primary = NULL;
1212         xsel.clipboard = NULL;
1213         xsel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
1214         if (xsel.xtarget == None)
1215                 xsel.xtarget = XA_STRING;
1216 }
1217
1218 int
1219 xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x, int y)
1220 {
1221         float winx = borderpx + x * win.cw, winy = borderpx + y * win.ch, xp, yp;
1222         ushort mode, prevmode = USHRT_MAX;
1223         Font *font = &dc.font;
1224         int frcflags = FRC_NORMAL;
1225         float runewidth = win.cw;
1226         Rune rune;
1227         FT_UInt glyphidx;
1228         FcResult fcres;
1229         FcPattern *fcpattern, *fontpattern;
1230         FcFontSet *fcsets[] = { NULL };
1231         FcCharSet *fccharset;
1232         int i, f, numspecs = 0;
1233
1234         for (i = 0, xp = winx, yp = winy + font->ascent; i < len; ++i) {
1235                 /* Fetch rune and mode for current glyph. */
1236                 rune = glyphs[i].u;
1237                 mode = glyphs[i].mode;
1238
1239                 /* Skip dummy wide-character spacing. */
1240                 if (mode & ATTR_WDUMMY)
1241                         continue;
1242
1243                 /* Determine font for glyph if different from previous glyph. */
1244                 if (prevmode != mode) {
1245                         prevmode = mode;
1246                         font = &dc.font;
1247                         frcflags = FRC_NORMAL;
1248                         runewidth = win.cw * ((mode & ATTR_WIDE) ? 2.0f : 1.0f);
1249                         if ((mode & ATTR_ITALIC) && (mode & ATTR_BOLD)) {
1250                                 font = &dc.ibfont;
1251                                 frcflags = FRC_ITALICBOLD;
1252                         } else if (mode & ATTR_ITALIC) {
1253                                 font = &dc.ifont;
1254                                 frcflags = FRC_ITALIC;
1255                         } else if (mode & ATTR_BOLD) {
1256                                 font = &dc.bfont;
1257                                 frcflags = FRC_BOLD;
1258                         }
1259                         yp = winy + font->ascent;
1260                 }
1261
1262                 /* Lookup character index with default font. */
1263                 glyphidx = XftCharIndex(xw.dpy, font->match, rune);
1264                 if (glyphidx) {
1265                         specs[numspecs].font = font->match;
1266                         specs[numspecs].glyph = glyphidx;
1267                         specs[numspecs].x = (short)xp;
1268                         specs[numspecs].y = (short)yp;
1269                         xp += runewidth;
1270                         numspecs++;
1271                         continue;
1272                 }
1273
1274                 /* Fallback on font cache, search the font cache for match. */
1275                 for (f = 0; f < frclen; f++) {
1276                         glyphidx = XftCharIndex(xw.dpy, frc[f].font, rune);
1277                         /* Everything correct. */
1278                         if (glyphidx && frc[f].flags == frcflags)
1279                                 break;
1280                         /* We got a default font for a not found glyph. */
1281                         if (!glyphidx && frc[f].flags == frcflags
1282                                         && frc[f].unicodep == rune) {
1283                                 break;
1284                         }
1285                 }
1286
1287                 /* Nothing was found. Use fontconfig to find matching font. */
1288                 if (f >= frclen) {
1289                         if (!font->set)
1290                                 font->set = FcFontSort(0, font->pattern,
1291                                                        1, 0, &fcres);
1292                         fcsets[0] = font->set;
1293
1294                         /*
1295                          * Nothing was found in the cache. Now use
1296                          * some dozen of Fontconfig calls to get the
1297                          * font for one single character.
1298                          *
1299                          * Xft and fontconfig are design failures.
1300                          */
1301                         fcpattern = FcPatternDuplicate(font->pattern);
1302                         fccharset = FcCharSetCreate();
1303
1304                         FcCharSetAddChar(fccharset, rune);
1305                         FcPatternAddCharSet(fcpattern, FC_CHARSET,
1306                                         fccharset);
1307                         FcPatternAddBool(fcpattern, FC_SCALABLE, 1);
1308
1309                         FcConfigSubstitute(0, fcpattern,
1310                                         FcMatchPattern);
1311                         FcDefaultSubstitute(fcpattern);
1312
1313                         fontpattern = FcFontSetMatch(0, fcsets, 1,
1314                                         fcpattern, &fcres);
1315
1316                         /* Allocate memory for the new cache entry. */
1317                         if (frclen >= frccap) {
1318                                 frccap += 16;
1319                                 frc = xrealloc(frc, frccap * sizeof(Fontcache));
1320                         }
1321
1322                         frc[frclen].font = XftFontOpenPattern(xw.dpy,
1323                                         fontpattern);
1324                         if (!frc[frclen].font)
1325                                 die("XftFontOpenPattern failed seeking fallback font: %s\n",
1326                                         strerror(errno));
1327                         frc[frclen].flags = frcflags;
1328                         frc[frclen].unicodep = rune;
1329
1330                         glyphidx = XftCharIndex(xw.dpy, frc[frclen].font, rune);
1331
1332                         f = frclen;
1333                         frclen++;
1334
1335                         FcPatternDestroy(fcpattern);
1336                         FcCharSetDestroy(fccharset);
1337                 }
1338
1339                 specs[numspecs].font = frc[f].font;
1340                 specs[numspecs].glyph = glyphidx;
1341                 specs[numspecs].x = (short)xp;
1342                 specs[numspecs].y = (short)yp;
1343                 xp += runewidth;
1344                 numspecs++;
1345         }
1346
1347         /* Harfbuzz transformation for ligatures. */
1348         hbtransform(specs, glyphs, len, x, y);
1349
1350         return numspecs;
1351 }
1352
1353 void
1354 xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, int y)
1355 {
1356         int charlen = len * ((base.mode & ATTR_WIDE) ? 2 : 1);
1357         int winx = borderpx + x * win.cw, winy = borderpx + y * win.ch,
1358             width = charlen * win.cw;
1359         Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
1360         XRenderColor colfg, colbg;
1361         XRectangle r;
1362
1363         /* Fallback on color display for attributes not supported by the font */
1364         if (base.mode & ATTR_ITALIC && base.mode & ATTR_BOLD) {
1365                 if (dc.ibfont.badslant || dc.ibfont.badweight)
1366                         base.fg = defaultattr;
1367         } else if ((base.mode & ATTR_ITALIC && dc.ifont.badslant) ||
1368             (base.mode & ATTR_BOLD && dc.bfont.badweight)) {
1369                 base.fg = defaultattr;
1370         }
1371
1372         if (IS_TRUECOL(base.fg)) {
1373                 colfg.alpha = 0xffff;
1374                 colfg.red = TRUERED(base.fg);
1375                 colfg.green = TRUEGREEN(base.fg);
1376                 colfg.blue = TRUEBLUE(base.fg);
1377                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
1378                 fg = &truefg;
1379         } else {
1380                 fg = &dc.col[base.fg];
1381         }
1382
1383         if (IS_TRUECOL(base.bg)) {
1384                 colbg.alpha = 0xffff;
1385                 colbg.green = TRUEGREEN(base.bg);
1386                 colbg.red = TRUERED(base.bg);
1387                 colbg.blue = TRUEBLUE(base.bg);
1388                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
1389                 bg = &truebg;
1390         } else {
1391                 bg = &dc.col[base.bg];
1392         }
1393
1394         /* Change basic system colors [0-7] to bright system colors [8-15] */
1395         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_BOLD && BETWEEN(base.fg, 0, 7))
1396                 fg = &dc.col[base.fg + 8];
1397
1398         if (IS_SET(MODE_REVERSE)) {
1399                 if (fg == &dc.col[defaultfg]) {
1400                         fg = &dc.col[defaultbg];
1401                 } else {
1402                         colfg.red = ~fg->color.red;
1403                         colfg.green = ~fg->color.green;
1404                         colfg.blue = ~fg->color.blue;
1405                         colfg.alpha = fg->color.alpha;
1406                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
1407                                         &revfg);
1408                         fg = &revfg;
1409                 }
1410
1411                 if (bg == &dc.col[defaultbg]) {
1412                         bg = &dc.col[defaultfg];
1413                 } else {
1414                         colbg.red = ~bg->color.red;
1415                         colbg.green = ~bg->color.green;
1416                         colbg.blue = ~bg->color.blue;
1417                         colbg.alpha = bg->color.alpha;
1418                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
1419                                         &revbg);
1420                         bg = &revbg;
1421                 }
1422         }
1423
1424         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_FAINT) {
1425                 colfg.red = fg->color.red / 2;
1426                 colfg.green = fg->color.green / 2;
1427                 colfg.blue = fg->color.blue / 2;
1428                 colfg.alpha = fg->color.alpha;
1429                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
1430                 fg = &revfg;
1431         }
1432
1433         if (base.mode & ATTR_REVERSE) {
1434                 temp = fg;
1435                 fg = bg;
1436                 bg = temp;
1437         }
1438
1439         if (base.mode & ATTR_BLINK && win.mode & MODE_BLINK)
1440                 fg = bg;
1441
1442         if (base.mode & ATTR_INVISIBLE)
1443                 fg = bg;
1444
1445         /* Intelligent cleaning up of the borders. */
1446         if (x == 0) {
1447                 xclear(0, (y == 0)? 0 : winy, borderpx,
1448                         winy + win.ch +
1449                         ((winy + win.ch >= borderpx + win.th)? win.h : 0));
1450         }
1451         if (winx + width >= borderpx + win.tw) {
1452                 xclear(winx + width, (y == 0)? 0 : winy, win.w,
1453                         ((winy + win.ch >= borderpx + win.th)? win.h : (winy + win.ch)));
1454         }
1455         if (y == 0)
1456                 xclear(winx, 0, winx + width, borderpx);
1457         if (winy + win.ch >= borderpx + win.th)
1458                 xclear(winx, winy + win.ch, winx + width, win.h);
1459
1460         /* Clean up the region we want to draw to. */
1461         XftDrawRect(xw.draw, bg, winx, winy, width, win.ch);
1462
1463         /* Set the clip region because Xft is sometimes dirty. */
1464         r.x = 0;
1465         r.y = 0;
1466         r.height = win.ch;
1467         r.width = width;
1468         XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
1469
1470         /* Render the glyphs. */
1471         XftDrawGlyphFontSpec(xw.draw, fg, specs, len);
1472
1473         /* Render underline and strikethrough. */
1474         if (base.mode & ATTR_UNDERLINE) {
1475                 XftDrawRect(xw.draw, fg, winx, winy + dc.font.ascent + 1,
1476                                 width, 1);
1477         }
1478
1479         if (base.mode & ATTR_STRUCK) {
1480                 XftDrawRect(xw.draw, fg, winx, winy + 2 * dc.font.ascent / 3,
1481                                 width, 1);
1482         }
1483
1484         /* Reset clip to none. */
1485         XftDrawSetClip(xw.draw, 0);
1486 }
1487
1488 void
1489 xdrawglyph(Glyph g, int x, int y)
1490 {
1491         int numspecs;
1492         XftGlyphFontSpec spec;
1493
1494         numspecs = xmakeglyphfontspecs(&spec, &g, 1, x, y);
1495         xdrawglyphfontspecs(&spec, g, numspecs, x, y);
1496 }
1497
1498 void
1499 xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og, Line line, int len)
1500 {
1501         Color drawcol;
1502
1503         /* remove the old cursor */
1504         if (selected(ox, oy))
1505                 og.mode ^= ATTR_REVERSE;
1506
1507         /* Redraw the line where cursor was previously.
1508          * It will restore the ligatures broken by the cursor. */
1509         xdrawline(line, 0, oy, len);
1510
1511         if (IS_SET(MODE_HIDE))
1512                 return;
1513
1514         /*
1515          * Select the right color for the right mode.
1516          */
1517         g.mode &= ATTR_BOLD|ATTR_ITALIC|ATTR_UNDERLINE|ATTR_STRUCK|ATTR_WIDE;
1518
1519         if (IS_SET(MODE_REVERSE)) {
1520                 g.mode |= ATTR_REVERSE;
1521                 g.bg = defaultfg;
1522                 if (selected(cx, cy)) {
1523                         drawcol = dc.col[defaultcs];
1524                         g.fg = defaultrcs;
1525                 } else {
1526                         drawcol = dc.col[defaultrcs];
1527                         g.fg = defaultcs;
1528                 }
1529         } else {
1530                 if (selected(cx, cy)) {
1531                         g.fg = defaultfg;
1532                         g.bg = defaultrcs;
1533                 } else {
1534                         g.fg = defaultbg;
1535                         g.bg = defaultcs;
1536                 }
1537                 drawcol = dc.col[g.bg];
1538         }
1539
1540         /* draw the new one */
1541         if (IS_SET(MODE_FOCUSED)) {
1542                 switch (win.cursor) {
1543                 case 0: /* Blinking block */
1544                 case 1: /* Blinking block (default) */
1545                         if (IS_SET(MODE_BLINK))
1546                                 break;
1547                         /* FALLTHROUGH */
1548                 case 2: /* Steady block */
1549                         xdrawglyph(g, cx, cy);
1550                         break;
1551                 case 3: /* Blinking underline */
1552                         if (IS_SET(MODE_BLINK))
1553                                 break;
1554                         /* FALLTHROUGH */
1555                 case 4: /* Steady underline */
1556                         XftDrawRect(xw.draw, &drawcol,
1557                                         borderpx + cx * win.cw,
1558                                         borderpx + (cy + 1) * win.ch - \
1559                                                 cursorthickness,
1560                                         win.cw, cursorthickness);
1561                         break;
1562                 case 5: /* Blinking bar */
1563                         if (IS_SET(MODE_BLINK))
1564                                 break;
1565                         /* FALLTHROUGH */
1566                 case 6: /* Steady bar */
1567                         XftDrawRect(xw.draw, &drawcol,
1568                                         borderpx + cx * win.cw,
1569                                         borderpx + cy * win.ch,
1570                                         cursorthickness, win.ch);
1571                         break;
1572                 case 7: /* Blinking st cursor */
1573                         if (IS_SET(MODE_BLINK))
1574                                 break;
1575                         /* FALLTHROUGH */
1576                 case 8: /* Steady st cursor */
1577                         g.u = stcursor;
1578                         xdrawglyph(g, cx, cy);
1579                         break;
1580                 }
1581         } else {
1582                 XftDrawRect(xw.draw, &drawcol,
1583                                 borderpx + cx * win.cw,
1584                                 borderpx + cy * win.ch,
1585                                 win.cw - 1, 1);
1586                 XftDrawRect(xw.draw, &drawcol,
1587                                 borderpx + cx * win.cw,
1588                                 borderpx + cy * win.ch,
1589                                 1, win.ch - 1);
1590                 XftDrawRect(xw.draw, &drawcol,
1591                                 borderpx + (cx + 1) * win.cw - 1,
1592                                 borderpx + cy * win.ch,
1593                                 1, win.ch - 1);
1594                 XftDrawRect(xw.draw, &drawcol,
1595                                 borderpx + cx * win.cw,
1596                                 borderpx + (cy + 1) * win.ch - 1,
1597                                 win.cw, 1);
1598         }
1599 }
1600
1601 void
1602 xsetenv(void)
1603 {
1604         char buf[sizeof(long) * 8 + 1];
1605
1606         snprintf(buf, sizeof(buf), "%lu", xw.win);
1607         setenv("WINDOWID", buf, 1);
1608 }
1609
1610 void
1611 xseticontitle(char *p)
1612 {
1613         XTextProperty prop;
1614         DEFAULT(p, opt_title);
1615
1616         Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
1617                         &prop);
1618         XSetWMIconName(xw.dpy, xw.win, &prop);
1619         XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmiconname);
1620         XFree(prop.value);
1621 }
1622
1623 void
1624 xsettitle(char *p)
1625 {
1626         XTextProperty prop;
1627         DEFAULT(p, opt_title);
1628
1629         Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
1630                         &prop);
1631         XSetWMName(xw.dpy, xw.win, &prop);
1632         XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
1633         XFree(prop.value);
1634 }
1635
1636 int
1637 xstartdraw(void)
1638 {
1639         return IS_SET(MODE_VISIBLE);
1640 }
1641
1642 void
1643 xdrawline(Line line, int x1, int y1, int x2)
1644 {
1645         int i, x, ox, numspecs;
1646         Glyph base, new;
1647         XftGlyphFontSpec *specs = xw.specbuf;
1648
1649         numspecs = xmakeglyphfontspecs(specs, &line[x1], x2 - x1, x1, y1);
1650         i = ox = 0;
1651         for (x = x1; x < x2 && i < numspecs; x++) {
1652                 new = line[x];
1653                 if (new.mode == ATTR_WDUMMY)
1654                         continue;
1655                 if (selected(x, y1))
1656                         new.mode ^= ATTR_REVERSE;
1657                 if (i > 0 && ATTRCMP(base, new)) {
1658                         xdrawglyphfontspecs(specs, base, i, ox, y1);
1659                         specs += i;
1660                         numspecs -= i;
1661                         i = 0;
1662                 }
1663                 if (i == 0) {
1664                         ox = x;
1665                         base = new;
1666                 }
1667                 i++;
1668         }
1669         if (i > 0)
1670                 xdrawglyphfontspecs(specs, base, i, ox, y1);
1671 }
1672
1673 void
1674 xfinishdraw(void)
1675 {
1676         XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, win.w,
1677                         win.h, 0, 0);
1678         XSetForeground(xw.dpy, dc.gc,
1679                         dc.col[IS_SET(MODE_REVERSE)?
1680                                 defaultfg : defaultbg].pixel);
1681 }
1682
1683 void
1684 xximspot(int x, int y)
1685 {
1686         if (xw.ime.xic == NULL)
1687                 return;
1688
1689         xw.ime.spot.x = borderpx + x * win.cw;
1690         xw.ime.spot.y = borderpx + (y + 1) * win.ch;
1691
1692         XSetICValues(xw.ime.xic, XNPreeditAttributes, xw.ime.spotlist, NULL);
1693 }
1694
1695 void
1696 expose(XEvent *ev)
1697 {
1698         redraw();
1699 }
1700
1701 void
1702 visibility(XEvent *ev)
1703 {
1704         XVisibilityEvent *e = &ev->xvisibility;
1705
1706         MODBIT(win.mode, e->state != VisibilityFullyObscured, MODE_VISIBLE);
1707 }
1708
1709 void
1710 unmap(XEvent *ev)
1711 {
1712         win.mode &= ~MODE_VISIBLE;
1713 }
1714
1715 void
1716 xsetpointermotion(int set)
1717 {
1718         MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
1719         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
1720 }
1721
1722 void
1723 xsetmode(int set, unsigned int flags)
1724 {
1725         int mode = win.mode;
1726         MODBIT(win.mode, set, flags);
1727         if ((win.mode & MODE_REVERSE) != (mode & MODE_REVERSE))
1728                 redraw();
1729 }
1730
1731 int
1732 xsetcursor(int cursor)
1733 {
1734         if (!BETWEEN(cursor, 0, 8)) /* 7-8: st extensions */
1735                 return 1;
1736         win.cursor = cursor;
1737         cursorblinks = win.cursor == 0 || win.cursor == 1 ||
1738                        win.cursor == 3 || win.cursor == 5 ||
1739                        win.cursor == 7;
1740         return 0;
1741 }
1742
1743 void
1744 xseturgency(int add)
1745 {
1746         XWMHints *h = XGetWMHints(xw.dpy, xw.win);
1747
1748         MODBIT(h->flags, add, XUrgencyHint);
1749         XSetWMHints(xw.dpy, xw.win, h);
1750         XFree(h);
1751 }
1752
1753 void
1754 xbell(void)
1755 {
1756         if (!(IS_SET(MODE_FOCUSED)))
1757                 xseturgency(1);
1758         if (bellvolume)
1759                 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
1760 }
1761
1762 void
1763 focus(XEvent *ev)
1764 {
1765         XFocusChangeEvent *e = &ev->xfocus;
1766
1767         if (e->mode == NotifyGrab)
1768                 return;
1769
1770         if (ev->type == FocusIn) {
1771                 if (xw.ime.xic)
1772                         XSetICFocus(xw.ime.xic);
1773                 win.mode |= MODE_FOCUSED;
1774                 xseturgency(0);
1775                 if (IS_SET(MODE_FOCUS))
1776                         ttywrite("\033[I", 3, 0);
1777         } else {
1778                 if (xw.ime.xic)
1779                         XUnsetICFocus(xw.ime.xic);
1780                 win.mode &= ~MODE_FOCUSED;
1781                 if (IS_SET(MODE_FOCUS))
1782                         ttywrite("\033[O", 3, 0);
1783         }
1784 }
1785
1786 int
1787 match(uint mask, uint state)
1788 {
1789         return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
1790 }
1791
1792 char*
1793 kmap(KeySym k, uint state)
1794 {
1795         Key *kp;
1796         int i;
1797
1798         /* Check for mapped keys out of X11 function keys. */
1799         for (i = 0; i < LEN(mappedkeys); i++) {
1800                 if (mappedkeys[i] == k)
1801                         break;
1802         }
1803         if (i == LEN(mappedkeys)) {
1804                 if ((k & 0xFFFF) < 0xFD00)
1805                         return NULL;
1806         }
1807
1808         for (kp = key; kp < key + LEN(key); kp++) {
1809                 if (kp->k != k)
1810                         continue;
1811
1812                 if (!match(kp->mask, state))
1813                         continue;
1814
1815                 if (IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
1816                         continue;
1817                 if (IS_SET(MODE_NUMLOCK) && kp->appkey == 2)
1818                         continue;
1819
1820                 if (IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
1821                         continue;
1822
1823                 return kp->s;
1824         }
1825
1826         return NULL;
1827 }
1828
1829 void
1830 kpress(XEvent *ev)
1831 {
1832         XKeyEvent *e = &ev->xkey;
1833         KeySym ksym;
1834         char buf[64], *customkey;
1835         int len;
1836         Rune c;
1837         Status status;
1838         Shortcut *bp;
1839
1840         if (IS_SET(MODE_KBDLOCK))
1841                 return;
1842
1843         if (xw.ime.xic)
1844                 len = XmbLookupString(xw.ime.xic, e, buf, sizeof buf, &ksym, &status);
1845         else
1846                 len = XLookupString(e, buf, sizeof buf, &ksym, NULL);
1847         /* 1. shortcuts */
1848         for (bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
1849                 if (ksym == bp->keysym && match(bp->mod, e->state)) {
1850                         bp->func(&(bp->arg));
1851                         return;
1852                 }
1853         }
1854
1855         /* 2. custom keys from config.h */
1856         if ((customkey = kmap(ksym, e->state))) {
1857                 ttywrite(customkey, strlen(customkey), 1);
1858                 return;
1859         }
1860
1861         /* 3. composed string from input method */
1862         if (len == 0)
1863                 return;
1864         if (len == 1 && e->state & Mod1Mask) {
1865                 if (IS_SET(MODE_8BIT)) {
1866                         if (*buf < 0177) {
1867                                 c = *buf | 0x80;
1868                                 len = utf8encode(c, buf);
1869                         }
1870                 } else {
1871                         buf[1] = buf[0];
1872                         buf[0] = '\033';
1873                         len = 2;
1874                 }
1875         }
1876         ttywrite(buf, len, 1);
1877 }
1878
1879 void
1880 cmessage(XEvent *e)
1881 {
1882         /*
1883          * See xembed specs
1884          *  http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
1885          */
1886         if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
1887                 if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
1888                         win.mode |= MODE_FOCUSED;
1889                         xseturgency(0);
1890                 } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
1891                         win.mode &= ~MODE_FOCUSED;
1892                 }
1893         } else if (e->xclient.data.l[0] == xw.wmdeletewin) {
1894                 ttyhangup();
1895                 exit(0);
1896         }
1897 }
1898
1899 void
1900 resize(XEvent *e)
1901 {
1902         if (e->xconfigure.width == win.w && e->xconfigure.height == win.h)
1903                 return;
1904
1905         cresize(e->xconfigure.width, e->xconfigure.height);
1906 }
1907
1908 void
1909 run(void)
1910 {
1911         XEvent ev;
1912         int w = win.w, h = win.h;
1913         fd_set rfd;
1914         int xfd = XConnectionNumber(xw.dpy), ttyfd, xev, drawing;
1915         struct timespec seltv, *tv, now, lastblink, trigger;
1916         double timeout;
1917
1918         /* Waiting for window mapping */
1919         do {
1920                 XNextEvent(xw.dpy, &ev);
1921                 /*
1922                  * This XFilterEvent call is required because of XOpenIM. It
1923                  * does filter out the key event and some client message for
1924                  * the input method too.
1925                  */
1926                 if (XFilterEvent(&ev, None))
1927                         continue;
1928                 if (ev.type == ConfigureNotify) {
1929                         w = ev.xconfigure.width;
1930                         h = ev.xconfigure.height;
1931                 }
1932         } while (ev.type != MapNotify);
1933
1934         ttyfd = ttynew(opt_line, shell, opt_io, opt_cmd);
1935         cresize(w, h);
1936
1937         for (timeout = -1, drawing = 0, lastblink = (struct timespec){0};;) {
1938                 FD_ZERO(&rfd);
1939                 FD_SET(ttyfd, &rfd);
1940                 FD_SET(xfd, &rfd);
1941
1942                 if (XPending(xw.dpy))
1943                         timeout = 0;  /* existing events might not set xfd */
1944
1945                 seltv.tv_sec = timeout / 1E3;
1946                 seltv.tv_nsec = 1E6 * (timeout - 1E3 * seltv.tv_sec);
1947                 tv = timeout >= 0 ? &seltv : NULL;
1948
1949                 if (pselect(MAX(xfd, ttyfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
1950                         if (errno == EINTR)
1951                                 continue;
1952                         die("select failed: %s\n", strerror(errno));
1953                 }
1954                 clock_gettime(CLOCK_MONOTONIC, &now);
1955
1956                 if (FD_ISSET(ttyfd, &rfd))
1957                         ttyread();
1958
1959                 xev = 0;
1960                 while (XPending(xw.dpy)) {
1961                         xev = 1;
1962                         XNextEvent(xw.dpy, &ev);
1963                         if (XFilterEvent(&ev, None))
1964                                 continue;
1965                         if (handler[ev.type])
1966                                 (handler[ev.type])(&ev);
1967                 }
1968
1969                 /*
1970                  * To reduce flicker and tearing, when new content or event
1971                  * triggers drawing, we first wait a bit to ensure we got
1972                  * everything, and if nothing new arrives - we draw.
1973                  * We start with trying to wait minlatency ms. If more content
1974                  * arrives sooner, we retry with shorter and shorter periods,
1975                  * and eventually draw even without idle after maxlatency ms.
1976                  * Typically this results in low latency while interacting,
1977                  * maximum latency intervals during `cat huge.txt`, and perfect
1978                  * sync with periodic updates from animations/key-repeats/etc.
1979                  */
1980                 if (FD_ISSET(ttyfd, &rfd) || xev) {
1981                         if (!drawing) {
1982                                 trigger = now;
1983                                 if (IS_SET(MODE_BLINK)) {
1984                                         win.mode ^= MODE_BLINK;
1985                                 }
1986                                 lastblink = now;
1987                                 drawing = 1;
1988                         }
1989                         timeout = (maxlatency - TIMEDIFF(now, trigger)) \
1990                                   / maxlatency * minlatency;
1991                         if (timeout > 0)
1992                                 continue;  /* we have time, try to find idle */
1993                 }
1994
1995                 /* idle detected or maxlatency exhausted -> draw */
1996                 timeout = -1;
1997                 if (blinktimeout && (cursorblinks || tattrset(ATTR_BLINK))) {
1998                         timeout = blinktimeout - TIMEDIFF(now, lastblink);
1999                         if (timeout <= 0) {
2000                                 if (-timeout > blinktimeout) /* start visible */
2001                                         win.mode |= MODE_BLINK;
2002                                 win.mode ^= MODE_BLINK;
2003                                 tsetdirtattr(ATTR_BLINK);
2004                                 lastblink = now;
2005                                 timeout = blinktimeout;
2006                         }
2007                 }
2008
2009                 draw();
2010                 XFlush(xw.dpy);
2011                 drawing = 0;
2012         }
2013 }
2014
2015 void
2016 usage(void)
2017 {
2018         die("usage: %s [-aiv] [-c class] [-f font] [-g geometry]"
2019             " [-n name] [-o file]\n"
2020             "          [-T title] [-t title] [-w windowid]"
2021             " [[-e] command [args ...]]\n"
2022             "       %s [-aiv] [-c class] [-f font] [-g geometry]"
2023             " [-n name] [-o file]\n"
2024             "          [-T title] [-t title] [-w windowid] -l line"
2025             " [stty_args ...]\n", argv0, argv0);
2026 }
2027
2028 int
2029 main(int argc, char *argv[])
2030 {
2031         xw.l = xw.t = 0;
2032         xw.isfixed = False;
2033         xsetcursor(cursorstyle);
2034
2035         ARGBEGIN {
2036         case 'a':
2037                 allowaltscreen = 0;
2038                 break;
2039         case 'c':
2040                 opt_class = EARGF(usage());
2041                 break;
2042         case 'e':
2043                 if (argc > 0)
2044                         --argc, ++argv;
2045                 goto run;
2046         case 'f':
2047                 opt_font = EARGF(usage());
2048                 break;
2049         case 'g':
2050                 xw.gm = XParseGeometry(EARGF(usage()),
2051                                 &xw.l, &xw.t, &cols, &rows);
2052                 break;
2053         case 'i':
2054                 xw.isfixed = 1;
2055                 break;
2056         case 'o':
2057                 opt_io = EARGF(usage());
2058                 break;
2059         case 'l':
2060                 opt_line = EARGF(usage());
2061                 break;
2062         case 'n':
2063                 opt_name = EARGF(usage());
2064                 break;
2065         case 't':
2066         case 'T':
2067                 opt_title = EARGF(usage());
2068                 break;
2069         case 'w':
2070                 opt_embed = EARGF(usage());
2071                 break;
2072         case 'v':
2073                 die("%s " VERSION "\n", argv0);
2074                 break;
2075         default:
2076                 usage();
2077         } ARGEND;
2078
2079 run:
2080         if (argc > 0) /* eat all remaining arguments */
2081                 opt_cmd = argv;
2082
2083         if (!opt_title)
2084                 opt_title = (opt_line || !opt_cmd) ? "st" : opt_cmd[0];
2085
2086         setlocale(LC_CTYPE, "");
2087         XSetLocaleModifiers("");
2088         cols = MAX(cols, 1);
2089         rows = MAX(rows, 1);
2090         tnew(cols, rows);
2091         xinit(cols, rows);
2092         xsetenv();
2093         selinit();
2094         run();
2095
2096         return 0;
2097 }