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 #include <X11/Xresource.h>
  18
  19 char *argv0;
  20 #include "arg.h"
  21 #include "st.h"
  22 #include "win.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 /* Xresources preferences */
  50 enum resource_type {
  51         STRING = 0,
  52         INTEGER = 1,
  53         FLOAT = 2
  54 };
  55
  56 typedef struct {
  57         char *name;
  58         enum resource_type type;
  59         void *dst;
  60 } ResourcePref;
  61
  62 /* X modifiers */
  63 #define XK_ANY_MOD    UINT_MAX
  64 #define XK_NO_MOD     0
  65 #define XK_SWITCH_MOD (1<<13)
  66
  67 /* function definitions used in config.h */
  68 static void clipcopy(const Arg *);
  69 static void clippaste(const Arg *);
  70 static void numlock(const Arg *);
  71 static void selpaste(const Arg *);
  72 static void zoom(const Arg *);
  73 static void zoomabs(const Arg *);
  74 static void zoomreset(const Arg *);
  75 static void ttysend(const Arg *);
  76
  77 /* config.h for applying patches and the configuration. */
  78 #include "config.h"
  79
  80 /* XEMBED messages */
  81 #define XEMBED_FOCUS_IN  4
  82 #define XEMBED_FOCUS_OUT 5
  83
  84 /* macros */
  85 #define IS_SET(flag)            ((win.mode & (flag)) != 0)
  86 #define TRUERED(x)              (((x) & 0xff0000) >> 8)
  87 #define TRUEGREEN(x)            (((x) & 0xff00))
  88 #define TRUEBLUE(x)             (((x) & 0xff) << 8)
  89
  90 typedef XftDraw *Draw;
  91 typedef XftColor Color;
  92 typedef XftGlyphFontSpec GlyphFontSpec;
  93
  94 /* Purely graphic info */
  95 typedef struct {
  96         int tw, th; /* tty width and height */
  97         int w, h; /* window width and height */
  98         int ch; /* char height */
  99         int cw; /* char width  */
 100         int mode; /* window state/mode flags */
 101         int cursor; /* cursor style */
 102 } TermWindow;
 103
 104 typedef struct {
 105         Display *dpy;
 106         Colormap cmap;
 107         Window win;
 108         Drawable buf;
 109         GlyphFontSpec *specbuf; /* font spec buffer used for rendering */
 110         Atom xembed, wmdeletewin, netwmname, netwmpid;
 111         struct {
 112                 XIM xim;
 113                 XIC xic;
 114                 XPoint spot;
 115                 XVaNestedList spotlist;
 116         } ime;
 117         Draw draw;
 118         Visual *vis;
 119         XSetWindowAttributes attrs;
 120         int scr;
 121         int isfixed; /* is fixed geometry? */
 122         int l, t; /* left and top offset */
 123         int gm; /* geometry mask */
 124 } XWindow;
 125
 126 typedef struct {
 127         Atom xtarget;
 128         char *primary, *clipboard;
 129         struct timespec tclick1;
 130         struct timespec tclick2;
 131 } XSelection;
 132
 133 /* Font structure */
 134 #define Font Font_
 135 typedef struct {
 136         int height;
 137         int width;
 138         int ascent;
 139         int descent;
 140         int badslant;
 141         int badweight;
 142         short lbearing;
 143         short rbearing;
 144         XftFont *match;
 145         FcFontSet *set;
 146         FcPattern *pattern;
 147 } Font;
 148
 149 /* Drawing Context */
 150 typedef struct {
 151         Color *col;
 152         size_t collen;
 153         Font font, bfont, ifont, ibfont;
 154         GC gc;
 155 } DC;
 156
 157 static inline ushort sixd_to_16bit(int);
 158 static int xmakeglyphfontspecs(XftGlyphFontSpec *, const Glyph *, int, int, int);
 159 static void xdrawglyphfontspecs(const XftGlyphFontSpec *, Glyph, int, int, int);
 160 static void xdrawglyph(Glyph, int, int);
 161 static void xclear(int, int, int, int);
 162 static int xgeommasktogravity(int);
 163 static int ximopen(Display *);
 164 static void ximinstantiate(Display *, XPointer, XPointer);
 165 static void ximdestroy(XIM, XPointer, XPointer);
 166 static int xicdestroy(XIC, XPointer, XPointer);
 167 static void xinit(int, int);
 168 static void cresize(int, int);
 169 static void xresize(int, int);
 170 static void xhints(void);
 171 static int xloadcolor(int, const char *, Color *);
 172 static int xloadfont(Font *, FcPattern *);
 173 static void xloadfonts(char *, double);
 174 static void xunloadfont(Font *);
 175 static void xunloadfonts(void);
 176 static void xsetenv(void);
 177 static void xseturgency(int);
 178 static int evcol(XEvent *);
 179 static int evrow(XEvent *);
 180
 181 static void expose(XEvent *);
 182 static void visibility(XEvent *);
 183 static void unmap(XEvent *);
 184 static void kpress(XEvent *);
 185 static void cmessage(XEvent *);
 186 static void resize(XEvent *);
 187 static void focus(XEvent *);
 188 static uint buttonmask(uint);
 189 static int mouseaction(XEvent *, uint);
 190 static void brelease(XEvent *);
 191 static void bpress(XEvent *);
 192 static void bmotion(XEvent *);
 193 static void propnotify(XEvent *);
 194 static void selnotify(XEvent *);
 195 static void selclear_(XEvent *);
 196 static void selrequest(XEvent *);
 197 static void setsel(char *, Time);
 198 static void mousesel(XEvent *, int);
 199 static void mousereport(XEvent *);
 200 static char *kmap(KeySym, uint);
 201 static int match(uint, uint);
 202
 203 static void run(void);
 204 static void usage(void);
 205
 206 static void (*handler[LASTEvent])(XEvent *) = {
 207         [KeyPress] = kpress,
 208         [ClientMessage] = cmessage,
 209         [ConfigureNotify] = resize,
 210         [VisibilityNotify] = visibility,
 211         [UnmapNotify] = unmap,
 212         [Expose] = expose,
 213         [FocusIn] = focus,
 214         [FocusOut] = focus,
 215         [MotionNotify] = bmotion,
 216         [ButtonPress] = bpress,
 217         [ButtonRelease] = brelease,
 218 /*
 219  * Uncomment if you want the selection to disappear when you select something
 220  * different in another window.
 221  */
 222 /*      [SelectionClear] = selclear_, */
 223         [SelectionNotify] = selnotify,
 224 /*
 225  * PropertyNotify is only turned on when there is some INCR transfer happening
 226  * for the selection retrieval.
 227  */
 228         [PropertyNotify] = propnotify,
 229         [SelectionRequest] = selrequest,
 230 };
 231
 232 /* Globals */
 233 static DC dc;
 234 static XWindow xw;
 235 static XSelection xsel;
 236 static TermWindow win;
 237
 238 /* Font Ring Cache */
 239 enum {
 240         FRC_NORMAL,
 241         FRC_ITALIC,
 242         FRC_BOLD,
 243         FRC_ITALICBOLD
 244 };
 245
 246 typedef struct {
 247         XftFont *font;
 248         int flags;
 249         Rune unicodep;
 250 } Fontcache;
 251
 252 /* Fontcache is an array now. A new font will be appended to the array. */
 253 static Fontcache *frc = NULL;
 254 static int frclen = 0;
 255 static int frccap = 0;
 256 static char *usedfont = NULL;
 257 static double usedfontsize = 0;
 258 static double defaultfontsize = 0;
 259
 260 static char *opt_class = NULL;
 261 static char **opt_cmd  = NULL;
 262 static char *opt_embed = NULL;
 263 static char *opt_font  = NULL;
 264 static char *opt_io    = NULL;
 265 static char *opt_line  = NULL;
 266 static char *opt_name  = NULL;
 267 static char *opt_title = NULL;
 268
 269 static int oldbutton = 3; /* button event on startup: 3 = release */
 270
 271 void
 272 clipcopy(const Arg *dummy)
 273 {
 274         Atom clipboard;
 275
 276         free(xsel.clipboard);
 277         xsel.clipboard = NULL;
 278
 279         if (xsel.primary != NULL) {
 280                 xsel.clipboard = xstrdup(xsel.primary);
 281                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 282                 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
 283         }
 284 }
 285
 286 void
 287 clippaste(const Arg *dummy)
 288 {
 289         Atom clipboard;
 290
 291         clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 292         XConvertSelection(xw.dpy, clipboard, xsel.xtarget, clipboard,
 293                         xw.win, CurrentTime);
 294 }
 295
 296 void
 297 selpaste(const Arg *dummy)
 298 {
 299         XConvertSelection(xw.dpy, XA_PRIMARY, xsel.xtarget, XA_PRIMARY,
 300                         xw.win, CurrentTime);
 301 }
 302
 303 void
 304 numlock(const Arg *dummy)
 305 {
 306         win.mode ^= MODE_NUMLOCK;
 307 }
 308
 309 void
 310 zoom(const Arg *arg)
 311 {
 312         Arg larg;
 313
 314         larg.f = usedfontsize + arg->f;
 315         zoomabs(&larg);
 316 }
 317
 318 void
 319 zoomabs(const Arg *arg)
 320 {
 321         xunloadfonts();
 322         xloadfonts(usedfont, arg->f);
 323         cresize(0, 0);
 324         redraw();
 325         xhints();
 326 }
 327
 328 void
 329 zoomreset(const Arg *arg)
 330 {
 331         Arg larg;
 332
 333         if (defaultfontsize > 0) {
 334                 larg.f = defaultfontsize;
 335                 zoomabs(&larg);
 336         }
 337 }
 338
 339 void
 340 ttysend(const Arg *arg)
 341 {
 342         ttywrite(arg->s, strlen(arg->s), 1);
 343 }
 344
 345 int
 346 evcol(XEvent *e)
 347 {
 348         int x = e->xbutton.x - borderpx;
 349         LIMIT(x, 0, win.tw - 1);
 350         return x / win.cw;
 351 }
 352
 353 int
 354 evrow(XEvent *e)
 355 {
 356         int y = e->xbutton.y - borderpx;
 357         LIMIT(y, 0, win.th - 1);
 358         return y / win.ch;
 359 }
 360
 361 void
 362 mousesel(XEvent *e, int done)
 363 {
 364         int type, seltype = SEL_REGULAR;
 365         uint state = e->xbutton.state & ~(Button1Mask | forcemousemod);
 366
 367         for (type = 1; type < LEN(selmasks); ++type) {
 368                 if (match(selmasks[type], state)) {
 369                         seltype = type;
 370                         break;
 371                 }
 372         }
 373         selextend(evcol(e), evrow(e), seltype, done);
 374         if (done)
 375                 setsel(getsel(), e->xbutton.time);
 376 }
 377
 378 void
 379 mousereport(XEvent *e)
 380 {
 381         int len, x = evcol(e), y = evrow(e),
 382             button = e->xbutton.button, state = e->xbutton.state;
 383         char buf[40];
 384         static int ox, oy;
 385
 386         /* from urxvt */
 387         if (e->xbutton.type == MotionNotify) {
 388                 if (x == ox && y == oy)
 389                         return;
 390                 if (!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
 391                         return;
 392                 /* MOUSE_MOTION: no reporting if no button is pressed */
 393                 if (IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
 394                         return;
 395
 396                 button = oldbutton + 32;
 397                 ox = x;
 398                 oy = y;
 399         } else {
 400                 if (!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
 401                         button = 3;
 402                 } else {
 403                         button -= Button1;
 404                         if (button >= 3)
 405                                 button += 64 - 3;
 406                 }
 407                 if (e->xbutton.type == ButtonPress) {
 408                         oldbutton = button;
 409                         ox = x;
 410                         oy = y;
 411                 } else if (e->xbutton.type == ButtonRelease) {
 412                         oldbutton = 3;
 413                         /* MODE_MOUSEX10: no button release reporting */
 414                         if (IS_SET(MODE_MOUSEX10))
 415                                 return;
 416                         if (button == 64 || button == 65)
 417                                 return;
 418                 }
 419         }
 420
 421         if (!IS_SET(MODE_MOUSEX10)) {
 422                 button += ((state & ShiftMask  ) ? 4  : 0)
 423                         + ((state & Mod4Mask   ) ? 8  : 0)
 424                         + ((state & ControlMask) ? 16 : 0);
 425         }
 426
 427         if (IS_SET(MODE_MOUSESGR)) {
 428                 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
 429                                 button, x+1, y+1,
 430                                 e->xbutton.type == ButtonRelease ? 'm' : 'M');
 431         } else if (x < 223 && y < 223) {
 432                 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
 433                                 32+button, 32+x+1, 32+y+1);
 434         } else {
 435                 return;
 436         }
 437
 438         ttywrite(buf, len, 0);
 439 }
 440
 441 uint
 442 buttonmask(uint button)
 443 {
 444         return button == Button1 ? Button1Mask
 445              : button == Button2 ? Button2Mask
 446              : button == Button3 ? Button3Mask
 447              : button == Button4 ? Button4Mask
 448              : button == Button5 ? Button5Mask
 449              : 0;
 450 }
 451
 452 int
 453 mouseaction(XEvent *e, uint release)
 454 {
 455         MouseShortcut *ms;
 456
 457         /* ignore Button<N>mask for Button<N> - it's set on release */
 458         uint state = e->xbutton.state & ~buttonmask(e->xbutton.button);
 459
 460         for (ms = mshortcuts; ms < mshortcuts + LEN(mshortcuts); ms++) {
 461                 if (ms->release == release &&
 462                     ms->button == e->xbutton.button &&
 463                     (match(ms->mod, state) ||  /* exact or forced */
 464                      match(ms->mod, state & ~forcemousemod))) {
 465                         ms->func(&(ms->arg));
 466                         return 1;
 467                 }
 468         }
 469
 470         return 0;
 471 }
 472
 473 void
 474 bpress(XEvent *e)
 475 {
 476         struct timespec now;
 477         int snap;
 478
 479         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forcemousemod)) {
 480                 mousereport(e);
 481                 return;
 482         }
 483
 484         if (mouseaction(e, 0))
 485                 return;
 486
 487         if (e->xbutton.button == Button1) {
 488                 /*
 489                  * If the user clicks below predefined timeouts specific
 490                  * snapping behaviour is exposed.
 491                  */
 492                 clock_gettime(CLOCK_MONOTONIC, &now);
 493                 if (TIMEDIFF(now, xsel.tclick2) <= tripleclicktimeout) {
 494                         snap = SNAP_LINE;
 495                 } else if (TIMEDIFF(now, xsel.tclick1) <= doubleclicktimeout) {
 496                         snap = SNAP_WORD;
 497                 } else {
 498                         snap = 0;
 499                 }
 500                 xsel.tclick2 = xsel.tclick1;
 501                 xsel.tclick1 = now;
 502
 503                 selstart(evcol(e), evrow(e), snap);
 504         }
 505 }
 506
 507 void
 508 propnotify(XEvent *e)
 509 {
 510         XPropertyEvent *xpev;
 511         Atom clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 512
 513         xpev = &e->xproperty;
 514         if (xpev->state == PropertyNewValue &&
 515                         (xpev->atom == XA_PRIMARY ||
 516                          xpev->atom == clipboard)) {
 517                 selnotify(e);
 518         }
 519 }
 520
 521 void
 522 selnotify(XEvent *e)
 523 {
 524         ulong nitems, ofs, rem;
 525         int format;
 526         uchar *data, *last, *repl;
 527         Atom type, incratom, property = None;
 528
 529         incratom = XInternAtom(xw.dpy, "INCR", 0);
 530
 531         ofs = 0;
 532         if (e->type == SelectionNotify)
 533                 property = e->xselection.property;
 534         else if (e->type == PropertyNotify)
 535                 property = e->xproperty.atom;
 536
 537         if (property == None)
 538                 return;
 539
 540         do {
 541                 if (XGetWindowProperty(xw.dpy, xw.win, property, ofs,
 542                                         BUFSIZ/4, False, AnyPropertyType,
 543                                         &type, &format, &nitems, &rem,
 544                                         &data)) {
 545                         fprintf(stderr, "Clipboard allocation failed\n");
 546                         return;
 547                 }
 548
 549                 if (e->type == PropertyNotify && nitems == 0 && rem == 0) {
 550                         /*
 551                          * If there is some PropertyNotify with no data, then
 552                          * this is the signal of the selection owner that all
 553                          * data has been transferred. We won't need to receive
 554                          * PropertyNotify events anymore.
 555                          */
 556                         MODBIT(xw.attrs.event_mask, 0, PropertyChangeMask);
 557                         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
 558                                         &xw.attrs);
 559                 }
 560
 561                 if (type == incratom) {
 562                         /*
 563                          * Activate the PropertyNotify events so we receive
 564                          * when the selection owner does send us the next
 565                          * chunk of data.
 566                          */
 567                         MODBIT(xw.attrs.event_mask, 1, PropertyChangeMask);
 568                         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
 569                                         &xw.attrs);
 570
 571                         /*
 572                          * Deleting the property is the transfer start signal.
 573                          */
 574                         XDeleteProperty(xw.dpy, xw.win, (int)property);
 575                         continue;
 576                 }
 577
 578                 /*
 579                  * As seen in getsel:
 580                  * Line endings are inconsistent in the terminal and GUI world
 581                  * copy and pasting. When receiving some selection data,
 582                  * replace all '\n' with '\r'.
 583                  * FIXME: Fix the computer world.
 584                  */
 585                 repl = data;
 586                 last = data + nitems * format / 8;
 587                 while ((repl = memchr(repl, '\n', last - repl))) {
 588                         *repl++ = '\r';
 589                 }
 590
 591                 if (IS_SET(MODE_BRCKTPASTE) && ofs == 0)
 592                         ttywrite("\033[200~", 6, 0);
 593                 ttywrite((char *)data, nitems * format / 8, 1);
 594                 if (IS_SET(MODE_BRCKTPASTE) && rem == 0)
 595                         ttywrite("\033[201~", 6, 0);
 596                 XFree(data);
 597                 /* number of 32-bit chunks returned */
 598                 ofs += nitems * format / 32;
 599         } while (rem > 0);
 600
 601         /*
 602          * Deleting the property again tells the selection owner to send the
 603          * next data chunk in the property.
 604          */
 605         XDeleteProperty(xw.dpy, xw.win, (int)property);
 606 }
 607
 608 void
 609 xclipcopy(void)
 610 {
 611         clipcopy(NULL);
 612 }
 613
 614 void
 615 selclear_(XEvent *e)
 616 {
 617         selclear();
 618 }
 619
 620 void
 621 selrequest(XEvent *e)
 622 {
 623         XSelectionRequestEvent *xsre;
 624         XSelectionEvent xev;
 625         Atom xa_targets, string, clipboard;
 626         char *seltext;
 627
 628         xsre = (XSelectionRequestEvent *) e;
 629         xev.type = SelectionNotify;
 630         xev.requestor = xsre->requestor;
 631         xev.selection = xsre->selection;
 632         xev.target = xsre->target;
 633         xev.time = xsre->time;
 634         if (xsre->property == None)
 635                 xsre->property = xsre->target;
 636
 637         /* reject */
 638         xev.property = None;
 639
 640         xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
 641         if (xsre->target == xa_targets) {
 642                 /* respond with the supported type */
 643                 string = xsel.xtarget;
 644                 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
 645                                 XA_ATOM, 32, PropModeReplace,
 646                                 (uchar *) &string, 1);
 647                 xev.property = xsre->property;
 648         } else if (xsre->target == xsel.xtarget || xsre->target == XA_STRING) {
 649                 /*
 650                  * xith XA_STRING non ascii characters may be incorrect in the
 651                  * requestor. It is not our problem, use utf8.
 652                  */
 653                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 654                 if (xsre->selection == XA_PRIMARY) {
 655                         seltext = xsel.primary;
 656                 } else if (xsre->selection == clipboard) {
 657                         seltext = xsel.clipboard;
 658                 } else {
 659                         fprintf(stderr,
 660                                 "Unhandled clipboard selection 0x%lx\n",
 661                                 xsre->selection);
 662                         return;
 663                 }
 664                 if (seltext != NULL) {
 665                         XChangeProperty(xsre->display, xsre->requestor,
 666                                         xsre->property, xsre->target,
 667                                         8, PropModeReplace,
 668                                         (uchar *)seltext, strlen(seltext));
 669                         xev.property = xsre->property;
 670                 }
 671         }
 672
 673         /* all done, send a notification to the listener */
 674         if (!XSendEvent(xsre->display, xsre->requestor, 1, 0, (XEvent *) &xev))
 675                 fprintf(stderr, "Error sending SelectionNotify event\n");
 676 }
 677
 678 void
 679 setsel(char *str, Time t)
 680 {
 681         if (!str)
 682                 return;
 683
 684         free(xsel.primary);
 685         xsel.primary = str;
 686
 687         XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
 688         if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
 689                 selclear();
 690 }
 691
 692 void
 693 xsetsel(char *str)
 694 {
 695         setsel(str, CurrentTime);
 696 }
 697
 698 void
 699 brelease(XEvent *e)
 700 {
 701         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forcemousemod)) {
 702                 mousereport(e);
 703                 return;
 704         }
 705
 706         if (mouseaction(e, 1))
 707                 return;
 708         if (e->xbutton.button == Button1)
 709                 mousesel(e, 1);
 710 }
 711
 712 void
 713 bmotion(XEvent *e)
 714 {
 715         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forcemousemod)) {
 716                 mousereport(e);
 717                 return;
 718         }
 719
 720         mousesel(e, 0);
 721 }
 722
 723 void
 724 cresize(int width, int height)
 725 {
 726         int col, row;
 727
 728         if (width != 0)
 729                 win.w = width;
 730         if (height != 0)
 731                 win.h = height;
 732
 733         col = (win.w - 2 * borderpx) / win.cw;
 734         row = (win.h - 2 * borderpx) / win.ch;
 735         col = MAX(1, col);
 736         row = MAX(1, row);
 737
 738         tresize(col, row);
 739         xresize(col, row);
 740         ttyresize(win.tw, win.th);
 741 }
 742
 743 void
 744 xresize(int col, int row)
 745 {
 746         win.tw = col * win.cw;
 747         win.th = row * win.ch;
 748
 749         XFreePixmap(xw.dpy, xw.buf);
 750         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
 751                         DefaultDepth(xw.dpy, xw.scr));
 752         XftDrawChange(xw.draw, xw.buf);
 753         xclear(0, 0, win.w, win.h);
 754
 755         /* resize to new width */
 756         xw.specbuf = xrealloc(xw.specbuf, col * sizeof(GlyphFontSpec));
 757 }
 758
 759 ushort
 760 sixd_to_16bit(int x)
 761 {
 762         return x == 0 ? 0 : 0x3737 + 0x2828 * x;
 763 }
 764
 765 int
 766 xloadcolor(int i, const char *name, Color *ncolor)
 767 {
 768         XRenderColor color = { .alpha = 0xffff };
 769
 770         if (!name) {
 771                 if (BETWEEN(i, 16, 255)) { /* 256 color */
 772                         if (i < 6*6*6+16) { /* same colors as xterm */
 773                                 color.red   = sixd_to_16bit( ((i-16)/36)%6 );
 774                                 color.green = sixd_to_16bit( ((i-16)/6) %6 );
 775                                 color.blue  = sixd_to_16bit( ((i-16)/1) %6 );
 776                         } else { /* greyscale */
 777                                 color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
 778                                 color.green = color.blue = color.red;
 779                         }
 780                         return XftColorAllocValue(xw.dpy, xw.vis,
 781                                                   xw.cmap, &color, ncolor);
 782                 } else
 783                         name = colorname[i];
 784         }
 785
 786         return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
 787 }
 788
 789 void
 790 xloadcols(void)
 791 {
 792         int i;
 793         static int loaded;
 794         Color *cp;
 795
 796         if (loaded) {
 797                 for (cp = dc.col; cp < &dc.col[dc.collen]; ++cp)
 798                         XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
 799         } else {
 800                 dc.collen = MAX(LEN(colorname), 256);
 801                 dc.col = xmalloc(dc.collen * sizeof(Color));
 802         }
 803
 804         for (i = 0; i < dc.collen; i++)
 805                 if (!xloadcolor(i, NULL, &dc.col[i])) {
 806                         if (colorname[i])
 807                                 die("could not allocate color '%s'\n", colorname[i]);
 808                         else
 809                                 die("could not allocate color %d\n", i);
 810                 }
 811         loaded = 1;
 812 }
 813
 814 int
 815 xsetcolorname(int x, const char *name)
 816 {
 817         Color ncolor;
 818
 819         if (!BETWEEN(x, 0, dc.collen))
 820                 return 1;
 821
 822         if (!xloadcolor(x, name, &ncolor))
 823                 return 1;
 824
 825         XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
 826         dc.col[x] = ncolor;
 827
 828         return 0;
 829 }
 830
 831 /*
 832  * Absolute coordinates.
 833  */
 834 void
 835 xclear(int x1, int y1, int x2, int y2)
 836 {
 837         XftDrawRect(xw.draw,
 838                         &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
 839                         x1, y1, x2-x1, y2-y1);
 840 }
 841
 842 void
 843 xhints(void)
 844 {
 845         XClassHint class = {opt_name ? opt_name : "st",
 846                             opt_class ? opt_class : "St"};
 847         XWMHints wm = {.flags = InputHint, .input = 1};
 848         XSizeHints *sizeh;
 849
 850         sizeh = XAllocSizeHints();
 851
 852         sizeh->flags = PSize | PResizeInc | PBaseSize | PMinSize;
 853         sizeh->height = win.h;
 854         sizeh->width = win.w;
 855         sizeh->height_inc = win.ch;
 856         sizeh->width_inc = win.cw;
 857         sizeh->base_height = 2 * borderpx;
 858         sizeh->base_width = 2 * borderpx;
 859         sizeh->min_height = win.ch + 2 * borderpx;
 860         sizeh->min_width = win.cw + 2 * borderpx;
 861         if (xw.isfixed) {
 862                 sizeh->flags |= PMaxSize;
 863                 sizeh->min_width = sizeh->max_width = win.w;
 864                 sizeh->min_height = sizeh->max_height = win.h;
 865         }
 866         if (xw.gm & (XValue|YValue)) {
 867                 sizeh->flags |= USPosition | PWinGravity;
 868                 sizeh->x = xw.l;
 869                 sizeh->y = xw.t;
 870                 sizeh->win_gravity = xgeommasktogravity(xw.gm);
 871         }
 872
 873         XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
 874                         &class);
 875         XFree(sizeh);
 876 }
 877
 878 int
 879 xgeommasktogravity(int mask)
 880 {
 881         switch (mask & (XNegative|YNegative)) {
 882         case 0:
 883                 return NorthWestGravity;
 884         case XNegative:
 885                 return NorthEastGravity;
 886         case YNegative:
 887                 return SouthWestGravity;
 888         }
 889
 890         return SouthEastGravity;
 891 }
 892
 893 int
 894 xloadfont(Font *f, FcPattern *pattern)
 895 {
 896         FcPattern *configured;
 897         FcPattern *match;
 898         FcResult result;
 899         XGlyphInfo extents;
 900         int wantattr, haveattr;
 901
 902         /*
 903          * Manually configure instead of calling XftMatchFont
 904          * so that we can use the configured pattern for
 905          * "missing glyph" lookups.
 906          */
 907         configured = FcPatternDuplicate(pattern);
 908         if (!configured)
 909                 return 1;
 910
 911         FcConfigSubstitute(NULL, configured, FcMatchPattern);
 912         XftDefaultSubstitute(xw.dpy, xw.scr, configured);
 913
 914         match = FcFontMatch(NULL, configured, &result);
 915         if (!match) {
 916                 FcPatternDestroy(configured);
 917                 return 1;
 918         }
 919
 920         if (!(f->match = XftFontOpenPattern(xw.dpy, match))) {
 921                 FcPatternDestroy(configured);
 922                 FcPatternDestroy(match);
 923                 return 1;
 924         }
 925
 926         if ((XftPatternGetInteger(pattern, "slant", 0, &wantattr) ==
 927             XftResultMatch)) {
 928                 /*
 929                  * Check if xft was unable to find a font with the appropriate
 930                  * slant but gave us one anyway. Try to mitigate.
 931                  */
 932                 if ((XftPatternGetInteger(f->match->pattern, "slant", 0,
 933                     &haveattr) != XftResultMatch) || haveattr < wantattr) {
 934                         f->badslant = 1;
 935                         fputs("font slant does not match\n", stderr);
 936                 }
 937         }
 938
 939         if ((XftPatternGetInteger(pattern, "weight", 0, &wantattr) ==
 940             XftResultMatch)) {
 941                 if ((XftPatternGetInteger(f->match->pattern, "weight", 0,
 942                     &haveattr) != XftResultMatch) || haveattr != wantattr) {
 943                         f->badweight = 1;
 944                         fputs("font weight does not match\n", stderr);
 945                 }
 946         }
 947
 948         XftTextExtentsUtf8(xw.dpy, f->match,
 949                 (const FcChar8 *) ascii_printable,
 950                 strlen(ascii_printable), &extents);
 951
 952         f->set = NULL;
 953         f->pattern = configured;
 954
 955         f->ascent = f->match->ascent;
 956         f->descent = f->match->descent;
 957         f->lbearing = 0;
 958         f->rbearing = f->match->max_advance_width;
 959
 960         f->height = f->ascent + f->descent;
 961         f->width = DIVCEIL(extents.xOff, strlen(ascii_printable));
 962
 963         return 0;
 964 }
 965
 966 void
 967 xloadfonts(char *fontstr, double fontsize)
 968 {
 969         FcPattern *pattern;
 970         double fontval;
 971
 972         if (fontstr[0] == '-')
 973                 pattern = XftXlfdParse(fontstr, False, False);
 974         else
 975                 pattern = FcNameParse((FcChar8 *)fontstr);
 976
 977         if (!pattern)
 978                 die("can't open font %s\n", fontstr);
 979
 980         if (fontsize > 1) {
 981                 FcPatternDel(pattern, FC_PIXEL_SIZE);
 982                 FcPatternDel(pattern, FC_SIZE);
 983                 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
 984                 usedfontsize = fontsize;
 985         } else {
 986                 if (FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval) ==
 987                                 FcResultMatch) {
 988                         usedfontsize = fontval;
 989                 } else if (FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval) ==
 990                                 FcResultMatch) {
 991                         usedfontsize = -1;
 992                 } else {
 993                         /*
 994                          * Default font size is 12, if none given. This is to
 995                          * have a known usedfontsize value.
 996                          */
 997                         FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
 998                         usedfontsize = 12;
 999                 }
1000                 defaultfontsize = usedfontsize;
1001         }
1002
1003         if (xloadfont(&dc.font, pattern))
1004                 die("can't open font %s\n", fontstr);
1005
1006         if (usedfontsize < 0) {
1007                 FcPatternGetDouble(dc.font.match->pattern,
1008                                    FC_PIXEL_SIZE, 0, &fontval);
1009                 usedfontsize = fontval;
1010                 if (fontsize == 0)
1011                         defaultfontsize = fontval;
1012         }
1013
1014         /* Setting character width and height. */
1015         win.cw = ceilf(dc.font.width * cwscale);
1016         win.ch = ceilf(dc.font.height * chscale);
1017
1018         FcPatternDel(pattern, FC_SLANT);
1019         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
1020         if (xloadfont(&dc.ifont, pattern))
1021                 die("can't open font %s\n", fontstr);
1022
1023         FcPatternDel(pattern, FC_WEIGHT);
1024         FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
1025         if (xloadfont(&dc.ibfont, pattern))
1026                 die("can't open font %s\n", fontstr);
1027
1028         FcPatternDel(pattern, FC_SLANT);
1029         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
1030         if (xloadfont(&dc.bfont, pattern))
1031                 die("can't open font %s\n", fontstr);
1032
1033         FcPatternDestroy(pattern);
1034 }
1035
1036 void
1037 xunloadfont(Font *f)
1038 {
1039         XftFontClose(xw.dpy, f->match);
1040         FcPatternDestroy(f->pattern);
1041         if (f->set)
1042                 FcFontSetDestroy(f->set);
1043 }
1044
1045 void
1046 xunloadfonts(void)
1047 {
1048         /* Free the loaded fonts in the font cache.  */
1049         while (frclen > 0)
1050                 XftFontClose(xw.dpy, frc[--frclen].font);
1051
1052         xunloadfont(&dc.font);
1053         xunloadfont(&dc.bfont);
1054         xunloadfont(&dc.ifont);
1055         xunloadfont(&dc.ibfont);
1056 }
1057
1058 int
1059 ximopen(Display *dpy)
1060 {
1061         XIMCallback imdestroy = { .client_data = NULL, .callback = ximdestroy };
1062         XICCallback icdestroy = { .client_data = NULL, .callback = xicdestroy };
1063
1064         xw.ime.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
1065         if (xw.ime.xim == NULL)
1066                 return 0;
1067
1068         if (XSetIMValues(xw.ime.xim, XNDestroyCallback, &imdestroy, NULL))
1069                 fprintf(stderr, "XSetIMValues: "
1070                                 "Could not set XNDestroyCallback.\n");
1071
1072         xw.ime.spotlist = XVaCreateNestedList(0, XNSpotLocation, &xw.ime.spot,
1073                                               NULL);
1074
1075         if (xw.ime.xic == NULL) {
1076                 xw.ime.xic = XCreateIC(xw.ime.xim, XNInputStyle,
1077                                        XIMPreeditNothing | XIMStatusNothing,
1078                                        XNClientWindow, xw.win,
1079                                        XNDestroyCallback, &icdestroy,
1080                                        NULL);
1081         }
1082         if (xw.ime.xic == NULL)
1083                 fprintf(stderr, "XCreateIC: Could not create input context.\n");
1084
1085         return 1;
1086 }
1087
1088 void
1089 ximinstantiate(Display *dpy, XPointer client, XPointer call)
1090 {
1091         if (ximopen(dpy))
1092                 XUnregisterIMInstantiateCallback(xw.dpy, NULL, NULL, NULL,
1093                                                  ximinstantiate, NULL);
1094 }
1095
1096 void
1097 ximdestroy(XIM xim, XPointer client, XPointer call)
1098 {
1099         xw.ime.xim = NULL;
1100         XRegisterIMInstantiateCallback(xw.dpy, NULL, NULL, NULL,
1101                                        ximinstantiate, NULL);
1102         XFree(xw.ime.spotlist);
1103 }
1104
1105 int
1106 xicdestroy(XIC xim, XPointer client, XPointer call)
1107 {
1108         xw.ime.xic = NULL;
1109         return 1;
1110 }
1111
1112 void
1113 xinit(int cols, int rows)
1114 {
1115         XGCValues gcvalues;
1116         Cursor cursor;
1117         Window parent;
1118         pid_t thispid = getpid();
1119         XColor xmousefg, xmousebg;
1120
1121         xw.scr = XDefaultScreen(xw.dpy);
1122         xw.vis = XDefaultVisual(xw.dpy, xw.scr);
1123
1124         /* font */
1125         if (!FcInit())
1126                 die("could not init fontconfig.\n");
1127
1128         usedfont = (opt_font == NULL)? font : opt_font;
1129         xloadfonts(usedfont, 0);
1130
1131         /* colors */
1132         xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1133         xloadcols();
1134
1135         /* adjust fixed window geometry */
1136         win.w = 2 * borderpx + cols * win.cw;
1137         win.h = 2 * borderpx + rows * win.ch;
1138         if (xw.gm & XNegative)
1139                 xw.l += DisplayWidth(xw.dpy, xw.scr) - win.w - 2;
1140         if (xw.gm & YNegative)
1141                 xw.t += DisplayHeight(xw.dpy, xw.scr) - win.h - 2;
1142
1143         /* Events */
1144         xw.attrs.background_pixel = dc.col[defaultbg].pixel;
1145         xw.attrs.border_pixel = dc.col[defaultbg].pixel;
1146         xw.attrs.bit_gravity = NorthWestGravity;
1147         xw.attrs.event_mask = FocusChangeMask | KeyPressMask | KeyReleaseMask
1148                 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1149                 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
1150         xw.attrs.colormap = xw.cmap;
1151
1152         if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
1153                 parent = XRootWindow(xw.dpy, xw.scr);
1154         xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
1155                         win.w, win.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
1156                         xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
1157                         | CWEventMask | CWColormap, &xw.attrs);
1158
1159         memset(&gcvalues, 0, sizeof(gcvalues));
1160         gcvalues.graphics_exposures = False;
1161         dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
1162                         &gcvalues);
1163         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
1164                         DefaultDepth(xw.dpy, xw.scr));
1165         XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
1166         XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, win.w, win.h);
1167
1168         /* font spec buffer */
1169         xw.specbuf = xmalloc(cols * sizeof(GlyphFontSpec));
1170
1171         /* Xft rendering context */
1172         xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
1173
1174         /* input methods */
1175         if (!ximopen(xw.dpy)) {
1176                 XRegisterIMInstantiateCallback(xw.dpy, NULL, NULL, NULL,
1177                                                ximinstantiate, NULL);
1178         }
1179
1180         /* white cursor, black outline */
1181         cursor = XCreateFontCursor(xw.dpy, mouseshape);
1182         XDefineCursor(xw.dpy, xw.win, cursor);
1183
1184         if (XParseColor(xw.dpy, xw.cmap, colorname[mousefg], &xmousefg) == 0) {
1185                 xmousefg.red   = 0xffff;
1186                 xmousefg.green = 0xffff;
1187                 xmousefg.blue  = 0xffff;
1188         }
1189
1190         if (XParseColor(xw.dpy, xw.cmap, colorname[mousebg], &xmousebg) == 0) {
1191                 xmousebg.red   = 0x0000;
1192                 xmousebg.green = 0x0000;
1193                 xmousebg.blue  = 0x0000;
1194         }
1195
1196         XRecolorCursor(xw.dpy, cursor, &xmousefg, &xmousebg);
1197
1198         xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
1199         xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
1200         xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
1201         XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
1202
1203         xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
1204         XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
1205                         PropModeReplace, (uchar *)&thispid, 1);
1206
1207         win.mode = MODE_NUMLOCK;
1208         resettitle();
1209         xhints();
1210         XMapWindow(xw.dpy, xw.win);
1211         XSync(xw.dpy, False);
1212
1213         clock_gettime(CLOCK_MONOTONIC, &xsel.tclick1);
1214         clock_gettime(CLOCK_MONOTONIC, &xsel.tclick2);
1215         xsel.primary = NULL;
1216         xsel.clipboard = NULL;
1217         xsel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
1218         if (xsel.xtarget == None)
1219                 xsel.xtarget = XA_STRING;
1220 }
1221
1222 int
1223 xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x, int y)
1224 {
1225         float winx = borderpx + x * win.cw, winy = borderpx + y * win.ch, xp, yp;
1226         ushort mode, prevmode = USHRT_MAX;
1227         Font *font = &dc.font;
1228         int frcflags = FRC_NORMAL;
1229         float runewidth = win.cw;
1230         Rune rune;
1231         FT_UInt glyphidx;
1232         FcResult fcres;
1233         FcPattern *fcpattern, *fontpattern;
1234         FcFontSet *fcsets[] = { NULL };
1235         FcCharSet *fccharset;
1236         int i, f, numspecs = 0;
1237
1238         for (i = 0, xp = winx, yp = winy + font->ascent; i < len; ++i) {
1239                 /* Fetch rune and mode for current glyph. */
1240                 rune = glyphs[i].u;
1241                 mode = glyphs[i].mode;
1242
1243                 /* Skip dummy wide-character spacing. */
1244                 if (mode == ATTR_WDUMMY)
1245                         continue;
1246
1247                 /* Determine font for glyph if different from previous glyph. */
1248                 if (prevmode != mode) {
1249                         prevmode = mode;
1250                         font = &dc.font;
1251                         frcflags = FRC_NORMAL;
1252                         runewidth = win.cw * ((mode & ATTR_WIDE) ? 2.0f : 1.0f);
1253                         if ((mode & ATTR_ITALIC) && (mode & ATTR_BOLD)) {
1254                                 font = &dc.ibfont;
1255                                 frcflags = FRC_ITALICBOLD;
1256                         } else if (mode & ATTR_ITALIC) {
1257                                 font = &dc.ifont;
1258                                 frcflags = FRC_ITALIC;
1259                         } else if (mode & ATTR_BOLD) {
1260                                 font = &dc.bfont;
1261                                 frcflags = FRC_BOLD;
1262                         }
1263                         yp = winy + font->ascent;
1264                 }
1265
1266                 /* Lookup character index with default font. */
1267                 glyphidx = XftCharIndex(xw.dpy, font->match, rune);
1268                 if (glyphidx) {
1269                         specs[numspecs].font = font->match;
1270                         specs[numspecs].glyph = glyphidx;
1271                         specs[numspecs].x = (short)xp;
1272                         specs[numspecs].y = (short)yp;
1273                         xp += runewidth;
1274                         numspecs++;
1275                         continue;
1276                 }
1277
1278                 /* Fallback on font cache, search the font cache for match. */
1279                 for (f = 0; f < frclen; f++) {
1280                         glyphidx = XftCharIndex(xw.dpy, frc[f].font, rune);
1281                         /* Everything correct. */
1282                         if (glyphidx && frc[f].flags == frcflags)
1283                                 break;
1284                         /* We got a default font for a not found glyph. */
1285                         if (!glyphidx && frc[f].flags == frcflags
1286                                         && frc[f].unicodep == rune) {
1287                                 break;
1288                         }
1289                 }
1290
1291                 /* Nothing was found. Use fontconfig to find matching font. */
1292                 if (f >= frclen) {
1293                         if (!font->set)
1294                                 font->set = FcFontSort(0, font->pattern,
1295                                                        1, 0, &fcres);
1296                         fcsets[0] = font->set;
1297
1298                         /*
1299                          * Nothing was found in the cache. Now use
1300                          * some dozen of Fontconfig calls to get the
1301                          * font for one single character.
1302                          *
1303                          * Xft and fontconfig are design failures.
1304                          */
1305                         fcpattern = FcPatternDuplicate(font->pattern);
1306                         fccharset = FcCharSetCreate();
1307
1308                         FcCharSetAddChar(fccharset, rune);
1309                         FcPatternAddCharSet(fcpattern, FC_CHARSET,
1310                                         fccharset);
1311                         FcPatternAddBool(fcpattern, FC_SCALABLE, 1);
1312
1313                         FcConfigSubstitute(0, fcpattern,
1314                                         FcMatchPattern);
1315                         FcDefaultSubstitute(fcpattern);
1316
1317                         fontpattern = FcFontSetMatch(0, fcsets, 1,
1318                                         fcpattern, &fcres);
1319
1320                         /* Allocate memory for the new cache entry. */
1321                         if (frclen >= frccap) {
1322                                 frccap += 16;
1323                                 frc = xrealloc(frc, frccap * sizeof(Fontcache));
1324                         }
1325
1326                         frc[frclen].font = XftFontOpenPattern(xw.dpy,
1327                                         fontpattern);
1328                         if (!frc[frclen].font)
1329                                 die("XftFontOpenPattern failed seeking fallback font: %s\n",
1330                                         strerror(errno));
1331                         frc[frclen].flags = frcflags;
1332                         frc[frclen].unicodep = rune;
1333
1334                         glyphidx = XftCharIndex(xw.dpy, frc[frclen].font, rune);
1335
1336                         f = frclen;
1337                         frclen++;
1338
1339                         FcPatternDestroy(fcpattern);
1340                         FcCharSetDestroy(fccharset);
1341                 }
1342
1343                 specs[numspecs].font = frc[f].font;
1344                 specs[numspecs].glyph = glyphidx;
1345                 specs[numspecs].x = (short)xp;
1346                 specs[numspecs].y = (short)yp;
1347                 xp += runewidth;
1348                 numspecs++;
1349         }
1350
1351         return numspecs;
1352 }
1353
1354 void
1355 xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, int y)
1356 {
1357         int charlen = len * ((base.mode & ATTR_WIDE) ? 2 : 1);
1358         int winx = borderpx + x * win.cw, winy = borderpx + y * win.ch,
1359             width = charlen * win.cw;
1360         Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
1361         XRenderColor colfg, colbg;
1362         XRectangle r;
1363
1364         /* Fallback on color display for attributes not supported by the font */
1365         if (base.mode & ATTR_ITALIC && base.mode & ATTR_BOLD) {
1366                 if (dc.ibfont.badslant || dc.ibfont.badweight)
1367                         base.fg = defaultattr;
1368         } else if ((base.mode & ATTR_ITALIC && dc.ifont.badslant) ||
1369             (base.mode & ATTR_BOLD && dc.bfont.badweight)) {
1370                 base.fg = defaultattr;
1371         }
1372
1373         if (IS_TRUECOL(base.fg)) {
1374                 colfg.alpha = 0xffff;
1375                 colfg.red = TRUERED(base.fg);
1376                 colfg.green = TRUEGREEN(base.fg);
1377                 colfg.blue = TRUEBLUE(base.fg);
1378                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
1379                 fg = &truefg;
1380         } else {
1381                 fg = &dc.col[base.fg];
1382         }
1383
1384         if (IS_TRUECOL(base.bg)) {
1385                 colbg.alpha = 0xffff;
1386                 colbg.green = TRUEGREEN(base.bg);
1387                 colbg.red = TRUERED(base.bg);
1388                 colbg.blue = TRUEBLUE(base.bg);
1389                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
1390                 bg = &truebg;
1391         } else {
1392                 bg = &dc.col[base.bg];
1393         }
1394
1395         /* Change basic system colors [0-7] to bright system colors [8-15] */
1396         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_BOLD && BETWEEN(base.fg, 0, 7))
1397                 fg = &dc.col[base.fg + 8];
1398
1399         if (IS_SET(MODE_REVERSE)) {
1400                 if (fg == &dc.col[defaultfg]) {
1401                         fg = &dc.col[defaultbg];
1402                 } else {
1403                         colfg.red = ~fg->color.red;
1404                         colfg.green = ~fg->color.green;
1405                         colfg.blue = ~fg->color.blue;
1406                         colfg.alpha = fg->color.alpha;
1407                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
1408                                         &revfg);
1409                         fg = &revfg;
1410                 }
1411
1412                 if (bg == &dc.col[defaultbg]) {
1413                         bg = &dc.col[defaultfg];
1414                 } else {
1415                         colbg.red = ~bg->color.red;
1416                         colbg.green = ~bg->color.green;
1417                         colbg.blue = ~bg->color.blue;
1418                         colbg.alpha = bg->color.alpha;
1419                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
1420                                         &revbg);
1421                         bg = &revbg;
1422                 }
1423         }
1424
1425         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_FAINT) {
1426                 colfg.red = fg->color.red / 2;
1427                 colfg.green = fg->color.green / 2;
1428                 colfg.blue = fg->color.blue / 2;
1429                 colfg.alpha = fg->color.alpha;
1430                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
1431                 fg = &revfg;
1432         }
1433
1434         if (base.mode & ATTR_REVERSE) {
1435                 temp = fg;
1436                 fg = bg;
1437                 bg = temp;
1438         }
1439
1440         if (base.mode & ATTR_BLINK && win.mode & MODE_BLINK)
1441                 fg = bg;
1442
1443         if (base.mode & ATTR_INVISIBLE)
1444                 fg = bg;
1445
1446         /* Intelligent cleaning up of the borders. */
1447         if (x == 0) {
1448                 xclear(0, (y == 0)? 0 : winy, borderpx,
1449                         winy + win.ch +
1450                         ((winy + win.ch >= borderpx + win.th)? win.h : 0));
1451         }
1452         if (winx + width >= borderpx + win.tw) {
1453                 xclear(winx + width, (y == 0)? 0 : winy, win.w,
1454                         ((winy + win.ch >= borderpx + win.th)? win.h : (winy + win.ch)));
1455         }
1456         if (y == 0)
1457                 xclear(winx, 0, winx + width, borderpx);
1458         if (winy + win.ch >= borderpx + win.th)
1459                 xclear(winx, winy + win.ch, winx + width, win.h);
1460
1461         /* Clean up the region we want to draw to. */
1462         XftDrawRect(xw.draw, bg, winx, winy, width, win.ch);
1463
1464         /* Set the clip region because Xft is sometimes dirty. */
1465         r.x = 0;
1466         r.y = 0;
1467         r.height = win.ch;
1468         r.width = width;
1469         XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
1470
1471         /* Render the glyphs. */
1472         XftDrawGlyphFontSpec(xw.draw, fg, specs, len);
1473
1474         /* Render underline and strikethrough. */
1475         if (base.mode & ATTR_UNDERLINE) {
1476                 XftDrawRect(xw.draw, fg, winx, winy + dc.font.ascent + 1,
1477                                 width, 1);
1478         }
1479
1480         if (base.mode & ATTR_STRUCK) {
1481                 XftDrawRect(xw.draw, fg, winx, winy + 2 * dc.font.ascent / 3,
1482                                 width, 1);
1483         }
1484
1485         /* Reset clip to none. */
1486         XftDrawSetClip(xw.draw, 0);
1487 }
1488
1489 void
1490 xdrawglyph(Glyph g, int x, int y)
1491 {
1492         int numspecs;
1493         XftGlyphFontSpec spec;
1494
1495         numspecs = xmakeglyphfontspecs(&spec, &g, 1, x, y);
1496         xdrawglyphfontspecs(&spec, g, numspecs, x, y);
1497 }
1498
1499 void
1500 xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og)
1501 {
1502         Color drawcol;
1503
1504         /* remove the old cursor */
1505         if (selected(ox, oy))
1506                 og.mode ^= ATTR_REVERSE;
1507         xdrawglyph(og, ox, oy);
1508
1509         if (IS_SET(MODE_HIDE))
1510                 return;
1511
1512         /*
1513          * Select the right color for the right mode.
1514          */
1515         g.mode &= ATTR_BOLD|ATTR_ITALIC|ATTR_UNDERLINE|ATTR_STRUCK|ATTR_WIDE;
1516
1517         if (IS_SET(MODE_REVERSE)) {
1518                 g.mode |= ATTR_REVERSE;
1519                 g.bg = defaultfg;
1520                 if (selected(cx, cy)) {
1521                         drawcol = dc.col[defaultcs];
1522                         g.fg = defaultrcs;
1523                 } else {
1524                         drawcol = dc.col[defaultrcs];
1525                         g.fg = defaultcs;
1526                 }
1527         } else {
1528                 if (selected(cx, cy)) {
1529                         g.fg = defaultfg;
1530                         g.bg = defaultrcs;
1531                 } else {
1532                         g.fg = defaultbg;
1533                         g.bg = defaultcs;
1534                 }
1535                 drawcol = dc.col[g.bg];
1536         }
1537
1538         /* draw the new one */
1539         if (IS_SET(MODE_FOCUSED)) {
1540                 switch (win.cursor) {
1541                 case 7: /* st extension */
1542                         g.u = 0x2603; /* snowman (U+2603) */
1543                         /* FALLTHROUGH */
1544                 case 0: /* Blinking Block */
1545                 case 1: /* Blinking Block (Default) */
1546                 case 2: /* Steady Block */
1547                         xdrawglyph(g, cx, cy);
1548                         break;
1549                 case 3: /* Blinking Underline */
1550                 case 4: /* Steady Underline */
1551                         XftDrawRect(xw.draw, &drawcol,
1552                                         borderpx + cx * win.cw,
1553                                         borderpx + (cy + 1) * win.ch - \
1554                                                 cursorthickness,
1555                                         win.cw, cursorthickness);
1556                         break;
1557                 case 5: /* Blinking bar */
1558                 case 6: /* Steady bar */
1559                         XftDrawRect(xw.draw, &drawcol,
1560                                         borderpx + cx * win.cw,
1561                                         borderpx + cy * win.ch,
1562                                         cursorthickness, win.ch);
1563                         break;
1564                 }
1565         } else {
1566                 XftDrawRect(xw.draw, &drawcol,
1567                                 borderpx + cx * win.cw,
1568                                 borderpx + cy * win.ch,
1569                                 win.cw - 1, 1);
1570                 XftDrawRect(xw.draw, &drawcol,
1571                                 borderpx + cx * win.cw,
1572                                 borderpx + cy * win.ch,
1573                                 1, win.ch - 1);
1574                 XftDrawRect(xw.draw, &drawcol,
1575                                 borderpx + (cx + 1) * win.cw - 1,
1576                                 borderpx + cy * win.ch,
1577                                 1, win.ch - 1);
1578                 XftDrawRect(xw.draw, &drawcol,
1579                                 borderpx + cx * win.cw,
1580                                 borderpx + (cy + 1) * win.ch - 1,
1581                                 win.cw, 1);
1582         }
1583 }
1584
1585 void
1586 xsetenv(void)
1587 {
1588         char buf[sizeof(long) * 8 + 1];
1589
1590         snprintf(buf, sizeof(buf), "%lu", xw.win);
1591         setenv("WINDOWID", buf, 1);
1592 }
1593
1594 void
1595 xsettitle(char *p)
1596 {
1597         XTextProperty prop;
1598         DEFAULT(p, opt_title);
1599
1600         Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
1601                         &prop);
1602         XSetWMName(xw.dpy, xw.win, &prop);
1603         XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
1604         XFree(prop.value);
1605 }
1606
1607 int
1608 xstartdraw(void)
1609 {
1610         return IS_SET(MODE_VISIBLE);
1611 }
1612
1613 void
1614 xdrawline(Line line, int x1, int y1, int x2)
1615 {
1616         int i, x, ox, numspecs;
1617         Glyph base, new;
1618         XftGlyphFontSpec *specs = xw.specbuf;
1619
1620         numspecs = xmakeglyphfontspecs(specs, &line[x1], x2 - x1, x1, y1);
1621         i = ox = 0;
1622         for (x = x1; x < x2 && i < numspecs; x++) {
1623                 new = line[x];
1624                 if (new.mode == ATTR_WDUMMY)
1625                         continue;
1626                 if (selected(x, y1))
1627                         new.mode ^= ATTR_REVERSE;
1628                 if (i > 0 && ATTRCMP(base, new)) {
1629                         xdrawglyphfontspecs(specs, base, i, ox, y1);
1630                         specs += i;
1631                         numspecs -= i;
1632                         i = 0;
1633                 }
1634                 if (i == 0) {
1635                         ox = x;
1636                         base = new;
1637                 }
1638                 i++;
1639         }
1640         if (i > 0)
1641                 xdrawglyphfontspecs(specs, base, i, ox, y1);
1642 }
1643
1644 void
1645 xfinishdraw(void)
1646 {
1647         XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, win.w,
1648                         win.h, 0, 0);
1649         XSetForeground(xw.dpy, dc.gc,
1650                         dc.col[IS_SET(MODE_REVERSE)?
1651                                 defaultfg : defaultbg].pixel);
1652 }
1653
1654 void
1655 xximspot(int x, int y)
1656 {
1657         if (xw.ime.xic == NULL)
1658                 return;
1659
1660         xw.ime.spot.x = borderpx + x * win.cw;
1661         xw.ime.spot.y = borderpx + (y + 1) * win.ch;
1662
1663         XSetICValues(xw.ime.xic, XNPreeditAttributes, xw.ime.spotlist, NULL);
1664 }
1665
1666 void
1667 expose(XEvent *ev)
1668 {
1669         redraw();
1670 }
1671
1672 void
1673 visibility(XEvent *ev)
1674 {
1675         XVisibilityEvent *e = &ev->xvisibility;
1676
1677         MODBIT(win.mode, e->state != VisibilityFullyObscured, MODE_VISIBLE);
1678 }
1679
1680 void
1681 unmap(XEvent *ev)
1682 {
1683         win.mode &= ~MODE_VISIBLE;
1684 }
1685
1686 void
1687 xsetpointermotion(int set)
1688 {
1689         MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
1690         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
1691 }
1692
1693 void
1694 xsetmode(int set, unsigned int flags)
1695 {
1696         int mode = win.mode;
1697         MODBIT(win.mode, set, flags);
1698         if ((win.mode & MODE_REVERSE) != (mode & MODE_REVERSE))
1699                 redraw();
1700 }
1701
1702 int
1703 xsetcursor(int cursor)
1704 {
1705         if (!BETWEEN(cursor, 0, 7)) /* 7: st extension */
1706                 return 1;
1707         win.cursor = cursor;
1708         return 0;
1709 }
1710
1711 void
1712 xseturgency(int add)
1713 {
1714         XWMHints *h = XGetWMHints(xw.dpy, xw.win);
1715
1716         MODBIT(h->flags, add, XUrgencyHint);
1717         XSetWMHints(xw.dpy, xw.win, h);
1718         XFree(h);
1719 }
1720
1721 void
1722 xbell(void)
1723 {
1724         if (!(IS_SET(MODE_FOCUSED)))
1725                 xseturgency(1);
1726         if (bellvolume)
1727                 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
1728 }
1729
1730 void
1731 focus(XEvent *ev)
1732 {
1733         XFocusChangeEvent *e = &ev->xfocus;
1734
1735         if (e->mode == NotifyGrab)
1736                 return;
1737
1738         if (ev->type == FocusIn) {
1739                 if (xw.ime.xic)
1740                         XSetICFocus(xw.ime.xic);
1741                 win.mode |= MODE_FOCUSED;
1742                 xseturgency(0);
1743                 if (IS_SET(MODE_FOCUS))
1744                         ttywrite("\033[I", 3, 0);
1745         } else {
1746                 if (xw.ime.xic)
1747                         XUnsetICFocus(xw.ime.xic);
1748                 win.mode &= ~MODE_FOCUSED;
1749                 if (IS_SET(MODE_FOCUS))
1750                         ttywrite("\033[O", 3, 0);
1751         }
1752 }
1753
1754 int
1755 match(uint mask, uint state)
1756 {
1757         return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
1758 }
1759
1760 char*
1761 kmap(KeySym k, uint state)
1762 {
1763         Key *kp;
1764         int i;
1765
1766         /* Check for mapped keys out of X11 function keys. */
1767         for (i = 0; i < LEN(mappedkeys); i++) {
1768                 if (mappedkeys[i] == k)
1769                         break;
1770         }
1771         if (i == LEN(mappedkeys)) {
1772                 if ((k & 0xFFFF) < 0xFD00)
1773                         return NULL;
1774         }
1775
1776         for (kp = key; kp < key + LEN(key); kp++) {
1777                 if (kp->k != k)
1778                         continue;
1779
1780                 if (!match(kp->mask, state))
1781                         continue;
1782
1783                 if (IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
1784                         continue;
1785                 if (IS_SET(MODE_NUMLOCK) && kp->appkey == 2)
1786                         continue;
1787
1788                 if (IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
1789                         continue;
1790
1791                 return kp->s;
1792         }
1793
1794         return NULL;
1795 }
1796
1797 void
1798 kpress(XEvent *ev)
1799 {
1800         XKeyEvent *e = &ev->xkey;
1801         KeySym ksym;
1802         char buf[64], *customkey;
1803         int len;
1804         Rune c;
1805         Status status;
1806         Shortcut *bp;
1807
1808         if (IS_SET(MODE_KBDLOCK))
1809                 return;
1810
1811         if (xw.ime.xic)
1812                 len = XmbLookupString(xw.ime.xic, e, buf, sizeof buf, &ksym, &status);
1813         else
1814                 len = XLookupString(e, buf, sizeof buf, &ksym, NULL);
1815         /* 1. shortcuts */
1816         for (bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
1817                 if (ksym == bp->keysym && match(bp->mod, e->state)) {
1818                         bp->func(&(bp->arg));
1819                         return;
1820                 }
1821         }
1822
1823         /* 2. custom keys from config.h */
1824         if ((customkey = kmap(ksym, e->state))) {
1825                 ttywrite(customkey, strlen(customkey), 1);
1826                 return;
1827         }
1828
1829         /* 3. composed string from input method */
1830         if (len == 0)
1831                 return;
1832         if (len == 1 && e->state & Mod1Mask) {
1833                 if (IS_SET(MODE_8BIT)) {
1834                         if (*buf < 0177) {
1835                                 c = *buf | 0x80;
1836                                 len = utf8encode(c, buf);
1837                         }
1838                 } else {
1839                         buf[1] = buf[0];
1840                         buf[0] = '\033';
1841                         len = 2;
1842                 }
1843         }
1844         ttywrite(buf, len, 1);
1845 }
1846
1847 void
1848 cmessage(XEvent *e)
1849 {
1850         /*
1851          * See xembed specs
1852          *  http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
1853          */
1854         if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
1855                 if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
1856                         win.mode |= MODE_FOCUSED;
1857                         xseturgency(0);
1858                 } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
1859                         win.mode &= ~MODE_FOCUSED;
1860                 }
1861         } else if (e->xclient.data.l[0] == xw.wmdeletewin) {
1862                 ttyhangup();
1863                 exit(0);
1864         }
1865 }
1866
1867 void
1868 resize(XEvent *e)
1869 {
1870         if (e->xconfigure.width == win.w && e->xconfigure.height == win.h)
1871                 return;
1872
1873         cresize(e->xconfigure.width, e->xconfigure.height);
1874 }
1875
1876 void
1877 run(void)
1878 {
1879         XEvent ev;
1880         int w = win.w, h = win.h;
1881         fd_set rfd;
1882         int xfd = XConnectionNumber(xw.dpy), ttyfd, xev, drawing;
1883         struct timespec seltv, *tv, now, lastblink, trigger;
1884         double timeout;
1885
1886         /* Waiting for window mapping */
1887         do {
1888                 XNextEvent(xw.dpy, &ev);
1889                 /*
1890                  * This XFilterEvent call is required because of XOpenIM. It
1891                  * does filter out the key event and some client message for
1892                  * the input method too.
1893                  */
1894                 if (XFilterEvent(&ev, None))
1895                         continue;
1896                 if (ev.type == ConfigureNotify) {
1897                         w = ev.xconfigure.width;
1898                         h = ev.xconfigure.height;
1899                 }
1900         } while (ev.type != MapNotify);
1901
1902         ttyfd = ttynew(opt_line, shell, opt_io, opt_cmd);
1903         cresize(w, h);
1904
1905         for (timeout = -1, drawing = 0, lastblink = (struct timespec){0};;) {
1906                 FD_ZERO(&rfd);
1907                 FD_SET(ttyfd, &rfd);
1908                 FD_SET(xfd, &rfd);
1909
1910                 if (XPending(xw.dpy))
1911                         timeout = 0;  /* existing events might not set xfd */
1912
1913                 seltv.tv_sec = timeout / 1E3;
1914                 seltv.tv_nsec = 1E6 * (timeout - 1E3 * seltv.tv_sec);
1915                 tv = timeout >= 0 ? &seltv : NULL;
1916
1917                 if (pselect(MAX(xfd, ttyfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
1918                         if (errno == EINTR)
1919                                 continue;
1920                         die("select failed: %s\n", strerror(errno));
1921                 }
1922                 clock_gettime(CLOCK_MONOTONIC, &now);
1923
1924                 if (FD_ISSET(ttyfd, &rfd))
1925                         ttyread();
1926
1927                 xev = 0;
1928                 while (XPending(xw.dpy)) {
1929                         xev = 1;
1930                         XNextEvent(xw.dpy, &ev);
1931                         if (XFilterEvent(&ev, None))
1932                                 continue;
1933                         if (handler[ev.type])
1934                                 (handler[ev.type])(&ev);
1935                 }
1936
1937                 /*
1938                  * To reduce flicker and tearing, when new content or event
1939                  * triggers drawing, we first wait a bit to ensure we got
1940                  * everything, and if nothing new arrives - we draw.
1941                  * We start with trying to wait minlatency ms. If more content
1942                  * arrives sooner, we retry with shorter and shorter periods,
1943                  * and eventually draw even without idle after maxlatency ms.
1944                  * Typically this results in low latency while interacting,
1945                  * maximum latency intervals during `cat huge.txt`, and perfect
1946                  * sync with periodic updates from animations/key-repeats/etc.
1947                  */
1948                 if (FD_ISSET(ttyfd, &rfd) || xev) {
1949                         if (!drawing) {
1950                                 trigger = now;
1951                                 drawing = 1;
1952                         }
1953                         timeout = (maxlatency - TIMEDIFF(now, trigger)) \
1954                                   / maxlatency * minlatency;
1955                         if (timeout > 0)
1956                                 continue;  /* we have time, try to find idle */
1957                 }
1958
1959                 /* idle detected or maxlatency exhausted -> draw */
1960                 timeout = -1;
1961                 if (blinktimeout && tattrset(ATTR_BLINK)) {
1962                         timeout = blinktimeout - TIMEDIFF(now, lastblink);
1963                         if (timeout <= 0) {
1964                                 if (-timeout > blinktimeout) /* start visible */
1965                                         win.mode |= MODE_BLINK;
1966                                 win.mode ^= MODE_BLINK;
1967                                 tsetdirtattr(ATTR_BLINK);
1968                                 lastblink = now;
1969                                 timeout = blinktimeout;
1970                         }
1971                 }
1972
1973                 draw();
1974                 XFlush(xw.dpy);
1975                 drawing = 0;
1976         }
1977 }
1978
1979 int
1980 resource_load(XrmDatabase db, char *name, enum resource_type rtype, void *dst)
1981 {
1982         char **sdst = dst;
1983         int *idst = dst;
1984         float *fdst = dst;
1985
1986         char fullname[256];
1987         char fullclass[256];
1988         char *type;
1989         XrmValue ret;
1990
1991         snprintf(fullname, sizeof(fullname), "%s.%s",
1992                         opt_name ? opt_name : "st", name);
1993         snprintf(fullclass, sizeof(fullclass), "%s.%s",
1994                         opt_class ? opt_class : "St", name);
1995         fullname[sizeof(fullname) - 1] = fullclass[sizeof(fullclass) - 1] = '\0';
1996
1997         XrmGetResource(db, fullname, fullclass, &type, &ret);
1998         if (ret.addr == NULL || strncmp("String", type, 64))
1999                 return 1;
2000
2001         switch (rtype) {
2002         case STRING:
2003                 *sdst = ret.addr;
2004                 break;
2005         case INTEGER:
2006                 *idst = strtoul(ret.addr, NULL, 10);
2007                 break;
2008         case FLOAT:
2009                 *fdst = strtof(ret.addr, NULL);
2010                 break;
2011         }
2012         return 0;
2013 }
2014
2015 void
2016 config_init(void)
2017 {
2018         char *resm;
2019         XrmDatabase db;
2020         ResourcePref *p;
2021
2022         XrmInitialize();
2023         resm = XResourceManagerString(xw.dpy);
2024         if (!resm)
2025                 return;
2026
2027         db = XrmGetStringDatabase(resm);
2028         for (p = resources; p < resources + LEN(resources); p++)
2029                 resource_load(db, p->name, p->type, p->dst);
2030 }
2031
2032 void
2033 usage(void)
2034 {
2035         die("usage: %s [-aiv] [-c class] [-f font] [-g geometry]"
2036             " [-n name] [-o file]\n"
2037             "          [-T title] [-t title] [-w windowid]"
2038             " [[-e] command [args ...]]\n"
2039             "       %s [-aiv] [-c class] [-f font] [-g geometry]"
2040             " [-n name] [-o file]\n"
2041             "          [-T title] [-t title] [-w windowid] -l line"
2042             " [stty_args ...]\n", argv0, argv0);
2043 }
2044
2045 int
2046 main(int argc, char *argv[])
2047 {
2048         xw.l = xw.t = 0;
2049         xw.isfixed = False;
2050         xsetcursor(cursorshape);
2051
2052         ARGBEGIN {
2053         case 'a':
2054                 allowaltscreen = 0;
2055                 break;
2056         case 'c':
2057                 opt_class = EARGF(usage());
2058                 break;
2059         case 'e':
2060                 if (argc > 0)
2061                         --argc, ++argv;
2062                 goto run;
2063         case 'f':
2064                 opt_font = EARGF(usage());
2065                 break;
2066         case 'g':
2067                 xw.gm = XParseGeometry(EARGF(usage()),
2068                                 &xw.l, &xw.t, &cols, &rows);
2069                 break;
2070         case 'i':
2071                 xw.isfixed = 1;
2072                 break;
2073         case 'o':
2074                 opt_io = EARGF(usage());
2075                 break;
2076         case 'l':
2077                 opt_line = EARGF(usage());
2078                 break;
2079         case 'n':
2080                 opt_name = EARGF(usage());
2081                 break;
2082         case 't':
2083         case 'T':
2084                 opt_title = EARGF(usage());
2085                 break;
2086         case 'w':
2087                 opt_embed = EARGF(usage());
2088                 break;
2089         case 'v':
2090                 die("%s " VERSION "\n", argv0);
2091                 break;
2092         default:
2093                 usage();
2094         } ARGEND;
2095
2096 run:
2097         if (argc > 0) /* eat all remaining arguments */
2098                 opt_cmd = argv;
2099
2100         if (!opt_title)
2101                 opt_title = (opt_line || !opt_cmd) ? "st" : opt_cmd[0];
2102
2103         setlocale(LC_CTYPE, "");
2104         XSetLocaleModifiers("");
2105
2106         if(!(xw.dpy = XOpenDisplay(NULL)))
2107                 die("Can't open display\n");
2108
2109         config_init();
2110         cols = MAX(cols, 1);
2111         rows = MAX(rows, 1);
2112         tnew(cols, rows);
2113         xinit(cols, rows);
2114         xsetenv();
2115         selinit();
2116         run();
2117
2118         return 0;
2119 }