x.c

   1 /* See LICENSE for license details. */
   2 #include <errno.h>
   3 #include <math.h>
   4 #include <limits.h>
   5 #include <locale.h>
   6 #include <signal.h>
   7 #include <sys/select.h>
   8 #include <time.h>
   9 #include <unistd.h>
  10 #include <libgen.h>
  11 #include <X11/Xatom.h>
  12 #include <X11/Xlib.h>
  13 #include <X11/cursorfont.h>
  14 #include <X11/keysym.h>
  15 #include <X11/Xft/Xft.h>
  16 #include <X11/XKBlib.h>
  17
  18 char *argv0;
  19 #include "arg.h"
  20 #include "st.h"
  21 #include "win.h"
  22
  23 /* types used in config.h */
  24 typedef struct {
  25         uint mod;
  26         KeySym keysym;
  27         void (*func)(const Arg *);
  28         const Arg arg;
  29 } Shortcut;
  30
  31 typedef struct {
  32         uint mod;
  33         uint button;
  34         void (*func)(const Arg *);
  35         const Arg arg;
  36         uint  release;
  37 } MouseShortcut;
  38
  39 typedef struct {
  40         KeySym k;
  41         uint mask;
  42         char *s;
  43         /* three-valued logic variables: 0 indifferent, 1 on, -1 off */
  44         signed char appkey;    /* application keypad */
  45         signed char appcursor; /* application cursor */
  46 } Key;
  47
  48 /* X modifiers */
  49 #define XK_ANY_MOD    UINT_MAX
  50 #define XK_NO_MOD     0
  51 #define XK_SWITCH_MOD (1<<13|1<<14)
  52
  53 /* function definitions used in config.h */
  54 static void clipcopy(const Arg *);
  55 static void clippaste(const Arg *);
  56 static void numlock(const Arg *);
  57 static void selpaste(const Arg *);
  58 static void zoom(const Arg *);
  59 static void zoomabs(const Arg *);
  60 static void zoomreset(const Arg *);
  61 static void ttysend(const Arg *);
  62
  63 /* config.h for applying patches and the configuration. */
  64 #include "config.h"
  65
  66 /* XEMBED messages */
  67 #define XEMBED_FOCUS_IN  4
  68 #define XEMBED_FOCUS_OUT 5
  69
  70 /* macros */
  71 #define IS_SET(flag)            ((win.mode & (flag)) != 0)
  72 #define TRUERED(x)              (((x) & 0xff0000) >> 8)
  73 #define TRUEGREEN(x)            (((x) & 0xff00))
  74 #define TRUEBLUE(x)             (((x) & 0xff) << 8)
  75
  76 typedef XftDraw *Draw;
  77 typedef XftColor Color;
  78 typedef XftGlyphFontSpec GlyphFontSpec;
  79
  80 /* Purely graphic info */
  81 typedef struct {
  82         int tw, th; /* tty width and height */
  83         int w, h; /* window width and height */
  84         int ch; /* char height */
  85         int cw; /* char width  */
  86         int mode; /* window state/mode flags */
  87         int cursor; /* cursor style */
  88 } TermWindow;
  89
  90 typedef struct {
  91         Display *dpy;
  92         Colormap cmap;
  93         Window win;
  94         Drawable buf;
  95         GlyphFontSpec *specbuf; /* font spec buffer used for rendering */
  96         Atom xembed, wmdeletewin, netwmname, netwmiconname, netwmpid;
  97         struct {
  98                 XIM xim;
  99                 XIC xic;
 100                 XPoint spot;
 101                 XVaNestedList spotlist;
 102         } ime;
 103         Draw draw;
 104         Visual *vis;
 105         XSetWindowAttributes attrs;
 106         int scr;
 107         int isfixed; /* is fixed geometry? */
 108         int depth; /* bit depth */
 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_alpha = NULL;
 248 static char *opt_class = NULL;
 249 static char **opt_cmd  = NULL;
 250 static char *opt_embed = NULL;
 251 static char *opt_font  = NULL;
 252 static char *opt_io    = NULL;
 253 static char *opt_line  = NULL;
 254 static char *opt_name  = NULL;
 255 static char *opt_title = NULL;
 256
 257 static uint buttons; /* bit field of pressed buttons */
 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, btn, code;
 370         int x = evcol(e), y = evrow(e);
 371         int state = e->xbutton.state;
 372         char buf[40];
 373         static int ox, oy;
 374
 375         if (e->type == MotionNotify) {
 376                 if (x == ox && y == oy)
 377                         return;
 378                 if (!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
 379                         return;
 380                 /* MODE_MOUSEMOTION: no reporting if no button is pressed */
 381                 if (IS_SET(MODE_MOUSEMOTION) && buttons == 0)
 382                         return;
 383                 /* Set btn to lowest-numbered pressed button, or 12 if no
 384                  * buttons are pressed. */
 385                 for (btn = 1; btn <= 11 && !(buttons & (1<<(btn-1))); btn++)
 386                         ;
 387                 code = 32;
 388         } else {
 389                 btn = e->xbutton.button;
 390                 /* Only buttons 1 through 11 can be encoded */
 391                 if (btn < 1 || btn > 11)
 392                         return;
 393                 if (e->type == ButtonRelease) {
 394                         /* MODE_MOUSEX10: no button release reporting */
 395                         if (IS_SET(MODE_MOUSEX10))
 396                                 return;
 397                         /* Don't send release events for the scroll wheel */
 398                         if (btn == 4 || btn == 5)
 399                                 return;
 400                 }
 401                 code = 0;
 402         }
 403
 404         ox = x;
 405         oy = y;
 406
 407         /* Encode btn into code. If no button is pressed for a motion event in
 408          * MODE_MOUSEMANY, then encode it as a release. */
 409         if ((!IS_SET(MODE_MOUSESGR) && e->type == ButtonRelease) || btn == 12)
 410                 code += 3;
 411         else if (btn >= 8)
 412                 code += 128 + btn - 8;
 413         else if (btn >= 4)
 414                 code += 64 + btn - 4;
 415         else
 416                 code += btn - 1;
 417
 418         if (!IS_SET(MODE_MOUSEX10)) {
 419                 code += ((state & ShiftMask  ) ?  4 : 0)
 420                       + ((state & Mod1Mask   ) ?  8 : 0) /* meta key: alt */
 421                       + ((state & ControlMask) ? 16 : 0);
 422         }
 423
 424         if (IS_SET(MODE_MOUSESGR)) {
 425                 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
 426                                 code, x+1, y+1,
 427                                 e->type == ButtonRelease ? 'm' : 'M');
 428         } else if (x < 223 && y < 223) {
 429                 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
 430                                 32+code, 32+x+1, 32+y+1);
 431         } else {
 432                 return;
 433         }
 434
 435         ttywrite(buf, len, 0);
 436 }
 437
 438 uint
 439 buttonmask(uint button)
 440 {
 441         return button == Button1 ? Button1Mask
 442              : button == Button2 ? Button2Mask
 443              : button == Button3 ? Button3Mask
 444              : button == Button4 ? Button4Mask
 445              : button == Button5 ? Button5Mask
 446              : 0;
 447 }
 448
 449 int
 450 mouseaction(XEvent *e, uint release)
 451 {
 452         MouseShortcut *ms;
 453
 454         /* ignore Button<N>mask for Button<N> - it's set on release */
 455         uint state = e->xbutton.state & ~buttonmask(e->xbutton.button);
 456
 457         for (ms = mshortcuts; ms < mshortcuts + LEN(mshortcuts); ms++) {
 458                 if (ms->release == release &&
 459                     ms->button == e->xbutton.button &&
 460                     (match(ms->mod, state) ||  /* exact or forced */
 461                      match(ms->mod, state & ~forcemousemod))) {
 462                         ms->func(&(ms->arg));
 463                         return 1;
 464                 }
 465         }
 466
 467         return 0;
 468 }
 469
 470 void
 471 bpress(XEvent *e)
 472 {
 473         int btn = e->xbutton.button;
 474         struct timespec now;
 475         int snap;
 476
 477         if (1 <= btn && btn <= 11)
 478                 buttons |= 1 << (btn-1);
 479
 480         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forcemousemod)) {
 481                 mousereport(e);
 482                 return;
 483         }
 484
 485         if (mouseaction(e, 0))
 486                 return;
 487
 488         if (btn == Button1) {
 489                 /*
 490                  * If the user clicks below predefined timeouts specific
 491                  * snapping behaviour is exposed.
 492                  */
 493                 clock_gettime(CLOCK_MONOTONIC, &now);
 494                 if (TIMEDIFF(now, xsel.tclick2) <= tripleclicktimeout) {
 495                         snap = SNAP_LINE;
 496                 } else if (TIMEDIFF(now, xsel.tclick1) <= doubleclicktimeout) {
 497                         snap = SNAP_WORD;
 498                 } else {
 499                         snap = 0;
 500                 }
 501                 xsel.tclick2 = xsel.tclick1;
 502                 xsel.tclick1 = now;
 503
 504                 selstart(evcol(e), evrow(e), snap);
 505         }
 506 }
 507
 508 void
 509 propnotify(XEvent *e)
 510 {
 511         XPropertyEvent *xpev;
 512         Atom clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 513
 514         xpev = &e->xproperty;
 515         if (xpev->state == PropertyNewValue &&
 516                         (xpev->atom == XA_PRIMARY ||
 517                          xpev->atom == clipboard)) {
 518                 selnotify(e);
 519         }
 520 }
 521
 522 void
 523 selnotify(XEvent *e)
 524 {
 525         ulong nitems, ofs, rem;
 526         int format;
 527         uchar *data, *last, *repl;
 528         Atom type, incratom, property = None;
 529
 530         incratom = XInternAtom(xw.dpy, "INCR", 0);
 531
 532         ofs = 0;
 533         if (e->type == SelectionNotify)
 534                 property = e->xselection.property;
 535         else if (e->type == PropertyNotify)
 536                 property = e->xproperty.atom;
 537
 538         if (property == None)
 539                 return;
 540
 541         do {
 542                 if (XGetWindowProperty(xw.dpy, xw.win, property, ofs,
 543                                         BUFSIZ/4, False, AnyPropertyType,
 544                                         &type, &format, &nitems, &rem,
 545                                         &data)) {
 546                         fprintf(stderr, "Clipboard allocation failed\n");
 547                         return;
 548                 }
 549
 550                 if (e->type == PropertyNotify && nitems == 0 && rem == 0) {
 551                         /*
 552                          * If there is some PropertyNotify with no data, then
 553                          * this is the signal of the selection owner that all
 554                          * data has been transferred. We won't need to receive
 555                          * PropertyNotify events anymore.
 556                          */
 557                         MODBIT(xw.attrs.event_mask, 0, PropertyChangeMask);
 558                         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
 559                                         &xw.attrs);
 560                 }
 561
 562                 if (type == incratom) {
 563                         /*
 564                          * Activate the PropertyNotify events so we receive
 565                          * when the selection owner does send us the next
 566                          * chunk of data.
 567                          */
 568                         MODBIT(xw.attrs.event_mask, 1, PropertyChangeMask);
 569                         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
 570                                         &xw.attrs);
 571
 572                         /*
 573                          * Deleting the property is the transfer start signal.
 574                          */
 575                         XDeleteProperty(xw.dpy, xw.win, (int)property);
 576                         continue;
 577                 }
 578
 579                 /*
 580                  * As seen in getsel:
 581                  * Line endings are inconsistent in the terminal and GUI world
 582                  * copy and pasting. When receiving some selection data,
 583                  * replace all '\n' with '\r'.
 584                  * FIXME: Fix the computer world.
 585                  */
 586                 repl = data;
 587                 last = data + nitems * format / 8;
 588                 while ((repl = memchr(repl, '\n', last - repl))) {
 589                         *repl++ = '\r';
 590                 }
 591
 592                 if (IS_SET(MODE_BRCKTPASTE) && ofs == 0)
 593                         ttywrite("\033[200~", 6, 0);
 594                 ttywrite((char *)data, nitems * format / 8, 1);
 595                 if (IS_SET(MODE_BRCKTPASTE) && rem == 0)
 596                         ttywrite("\033[201~", 6, 0);
 597                 XFree(data);
 598                 /* number of 32-bit chunks returned */
 599                 ofs += nitems * format / 32;
 600         } while (rem > 0);
 601
 602         /*
 603          * Deleting the property again tells the selection owner to send the
 604          * next data chunk in the property.
 605          */
 606         XDeleteProperty(xw.dpy, xw.win, (int)property);
 607 }
 608
 609 void
 610 xclipcopy(void)
 611 {
 612         clipcopy(NULL);
 613 }
 614
 615 void
 616 selclear_(XEvent *e)
 617 {
 618         selclear();
 619 }
 620
 621 void
 622 selrequest(XEvent *e)
 623 {
 624         XSelectionRequestEvent *xsre;
 625         XSelectionEvent xev;
 626         Atom xa_targets, string, clipboard;
 627         char *seltext;
 628
 629         xsre = (XSelectionRequestEvent *) e;
 630         xev.type = SelectionNotify;
 631         xev.requestor = xsre->requestor;
 632         xev.selection = xsre->selection;
 633         xev.target = xsre->target;
 634         xev.time = xsre->time;
 635         if (xsre->property == None)
 636                 xsre->property = xsre->target;
 637
 638         /* reject */
 639         xev.property = None;
 640
 641         xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
 642         if (xsre->target == xa_targets) {
 643                 /* respond with the supported type */
 644                 string = xsel.xtarget;
 645                 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
 646                                 XA_ATOM, 32, PropModeReplace,
 647                                 (uchar *) &string, 1);
 648                 xev.property = xsre->property;
 649         } else if (xsre->target == xsel.xtarget || xsre->target == XA_STRING) {
 650                 /*
 651                  * xith XA_STRING non ascii characters may be incorrect in the
 652                  * requestor. It is not our problem, use utf8.
 653                  */
 654                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 655                 if (xsre->selection == XA_PRIMARY) {
 656                         seltext = xsel.primary;
 657                 } else if (xsre->selection == clipboard) {
 658                         seltext = xsel.clipboard;
 659                 } else {
 660                         fprintf(stderr,
 661                                 "Unhandled clipboard selection 0x%lx\n",
 662                                 xsre->selection);
 663                         return;
 664                 }
 665                 if (seltext != NULL) {
 666                         XChangeProperty(xsre->display, xsre->requestor,
 667                                         xsre->property, xsre->target,
 668                                         8, PropModeReplace,
 669                                         (uchar *)seltext, strlen(seltext));
 670                         xev.property = xsre->property;
 671                 }
 672         }
 673
 674         /* all done, send a notification to the listener */
 675         if (!XSendEvent(xsre->display, xsre->requestor, 1, 0, (XEvent *) &xev))
 676                 fprintf(stderr, "Error sending SelectionNotify event\n");
 677 }
 678
 679 void
 680 setsel(char *str, Time t)
 681 {
 682         if (!str)
 683                 return;
 684
 685         free(xsel.primary);
 686         xsel.primary = str;
 687
 688         XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
 689         if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
 690                 selclear();
 691 }
 692
 693 void
 694 xsetsel(char *str)
 695 {
 696         setsel(str, CurrentTime);
 697 }
 698
 699 void
 700 brelease(XEvent *e)
 701 {
 702         int btn = e->xbutton.button;
 703
 704         if (1 <= btn && btn <= 11)
 705                 buttons &= ~(1 << (btn-1));
 706
 707         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forcemousemod)) {
 708                 mousereport(e);
 709                 return;
 710         }
 711
 712         if (mouseaction(e, 1))
 713                 return;
 714         if (btn == Button1)
 715                 mousesel(e, 1);
 716 }
 717
 718 void
 719 bmotion(XEvent *e)
 720 {
 721         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forcemousemod)) {
 722                 mousereport(e);
 723                 return;
 724         }
 725
 726         mousesel(e, 0);
 727 }
 728
 729 void
 730 cresize(int width, int height)
 731 {
 732         int col, row;
 733
 734         if (width != 0)
 735                 win.w = width;
 736         if (height != 0)
 737                 win.h = height;
 738
 739         col = (win.w - 2 * borderpx) / win.cw;
 740         row = (win.h - 2 * borderpx) / win.ch;
 741         col = MAX(1, col);
 742         row = MAX(1, row);
 743
 744         tresize(col, row);
 745         xresize(col, row);
 746         ttyresize(win.tw, win.th);
 747 }
 748
 749 void
 750 xresize(int col, int row)
 751 {
 752         win.tw = col * win.cw;
 753         win.th = row * win.ch;
 754
 755         XFreePixmap(xw.dpy, xw.buf);
 756         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
 757                         xw.depth);
 758         XftDrawChange(xw.draw, xw.buf);
 759         xclear(0, 0, win.w, win.h);
 760
 761         /* resize to new width */
 762         xw.specbuf = xrealloc(xw.specbuf, col * sizeof(GlyphFontSpec));
 763 }
 764
 765 ushort
 766 sixd_to_16bit(int x)
 767 {
 768         return x == 0 ? 0 : 0x3737 + 0x2828 * x;
 769 }
 770
 771 int
 772 xloadcolor(int i, const char *name, Color *ncolor)
 773 {
 774         XRenderColor color = { .alpha = 0xffff };
 775
 776         if (!name) {
 777                 if (BETWEEN(i, 16, 255)) { /* 256 color */
 778                         if (i < 6*6*6+16) { /* same colors as xterm */
 779                                 color.red   = sixd_to_16bit( ((i-16)/36)%6 );
 780                                 color.green = sixd_to_16bit( ((i-16)/6) %6 );
 781                                 color.blue  = sixd_to_16bit( ((i-16)/1) %6 );
 782                         } else { /* greyscale */
 783                                 color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
 784                                 color.green = color.blue = color.red;
 785                         }
 786                         return XftColorAllocValue(xw.dpy, xw.vis,
 787                                                   xw.cmap, &color, ncolor);
 788                 } else
 789                         name = colorname[i];
 790         }
 791
 792         return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
 793 }
 794
 795 void
 796 xloadcols(void)
 797 {
 798         int i;
 799         static int loaded;
 800         Color *cp;
 801
 802         if (loaded) {
 803                 for (cp = dc.col; cp < &dc.col[dc.collen]; ++cp)
 804                         XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
 805         } else {
 806                 dc.collen = MAX(LEN(colorname), 256);
 807                 dc.col = xmalloc(dc.collen * sizeof(Color));
 808         }
 809
 810         for (i = 0; i < dc.collen; i++)
 811                 if (!xloadcolor(i, NULL, &dc.col[i])) {
 812                         if (colorname[i])
 813                                 die("could not allocate color '%s'\n", colorname[i]);
 814                         else
 815                                 die("could not allocate color %d\n", i);
 816                 }
 817
 818         /* set alpha value of bg color */
 819         if (opt_alpha)
 820                 alpha = strtof(opt_alpha, NULL);
 821         dc.col[defaultbg].color.alpha = (unsigned short)(0xffff * alpha);
 822         dc.col[defaultbg].pixel &= 0x00FFFFFF;
 823         dc.col[defaultbg].pixel |= (unsigned char)(0xff * alpha) << 24;
 824         loaded = 1;
 825 }
 826
 827 int
 828 xgetcolor(int x, unsigned char *r, unsigned char *g, unsigned char *b)
 829 {
 830         if (!BETWEEN(x, 0, dc.collen))
 831                 return 1;
 832
 833         *r = dc.col[x].color.red >> 8;
 834         *g = dc.col[x].color.green >> 8;
 835         *b = dc.col[x].color.blue >> 8;
 836
 837         return 0;
 838 }
 839
 840 int
 841 xsetcolorname(int x, const char *name)
 842 {
 843         Color ncolor;
 844
 845         if (!BETWEEN(x, 0, dc.collen))
 846                 return 1;
 847
 848         if (!xloadcolor(x, name, &ncolor))
 849                 return 1;
 850
 851         XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
 852         dc.col[x] = ncolor;
 853
 854         return 0;
 855 }
 856
 857 /*
 858  * Absolute coordinates.
 859  */
 860 void
 861 xclear(int x1, int y1, int x2, int y2)
 862 {
 863         XftDrawRect(xw.draw,
 864                         &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
 865                         x1, y1, x2-x1, y2-y1);
 866 }
 867
 868 void
 869 xhints(void)
 870 {
 871         XClassHint class = {opt_name ? opt_name : termname,
 872                             opt_class ? opt_class : termname};
 873         XWMHints wm = {.flags = InputHint, .input = 1};
 874         XSizeHints *sizeh;
 875
 876         sizeh = XAllocSizeHints();
 877
 878         sizeh->flags = PSize | PResizeInc | PBaseSize | PMinSize;
 879         sizeh->height = win.h;
 880         sizeh->width = win.w;
 881         sizeh->height_inc = win.ch;
 882         sizeh->width_inc = win.cw;
 883         sizeh->base_height = 2 * borderpx;
 884         sizeh->base_width = 2 * borderpx;
 885         sizeh->min_height = win.ch + 2 * borderpx;
 886         sizeh->min_width = win.cw + 2 * borderpx;
 887         if (xw.isfixed) {
 888                 sizeh->flags |= PMaxSize;
 889                 sizeh->min_width = sizeh->max_width = win.w;
 890                 sizeh->min_height = sizeh->max_height = win.h;
 891         }
 892         if (xw.gm & (XValue|YValue)) {
 893                 sizeh->flags |= USPosition | PWinGravity;
 894                 sizeh->x = xw.l;
 895                 sizeh->y = xw.t;
 896                 sizeh->win_gravity = xgeommasktogravity(xw.gm);
 897         }
 898
 899         XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
 900                         &class);
 901         XFree(sizeh);
 902 }
 903
 904 int
 905 xgeommasktogravity(int mask)
 906 {
 907         switch (mask & (XNegative|YNegative)) {
 908         case 0:
 909                 return NorthWestGravity;
 910         case XNegative:
 911                 return NorthEastGravity;
 912         case YNegative:
 913                 return SouthWestGravity;
 914         }
 915
 916         return SouthEastGravity;
 917 }
 918
 919 int
 920 xloadfont(Font *f, FcPattern *pattern)
 921 {
 922         FcPattern *configured;
 923         FcPattern *match;
 924         FcResult result;
 925         XGlyphInfo extents;
 926         int wantattr, haveattr;
 927
 928         /*
 929          * Manually configure instead of calling XftMatchFont
 930          * so that we can use the configured pattern for
 931          * "missing glyph" lookups.
 932          */
 933         configured = FcPatternDuplicate(pattern);
 934         if (!configured)
 935                 return 1;
 936
 937         FcConfigSubstitute(NULL, configured, FcMatchPattern);
 938         XftDefaultSubstitute(xw.dpy, xw.scr, configured);
 939
 940         match = FcFontMatch(NULL, configured, &result);
 941         if (!match) {
 942                 FcPatternDestroy(configured);
 943                 return 1;
 944         }
 945
 946         if (!(f->match = XftFontOpenPattern(xw.dpy, match))) {
 947                 FcPatternDestroy(configured);
 948                 FcPatternDestroy(match);
 949                 return 1;
 950         }
 951
 952         if ((XftPatternGetInteger(pattern, "slant", 0, &wantattr) ==
 953             XftResultMatch)) {
 954                 /*
 955                  * Check if xft was unable to find a font with the appropriate
 956                  * slant but gave us one anyway. Try to mitigate.
 957                  */
 958                 if ((XftPatternGetInteger(f->match->pattern, "slant", 0,
 959                     &haveattr) != XftResultMatch) || haveattr < wantattr) {
 960                         f->badslant = 1;
 961                         fputs("font slant does not match\n", stderr);
 962                 }
 963         }
 964
 965         if ((XftPatternGetInteger(pattern, "weight", 0, &wantattr) ==
 966             XftResultMatch)) {
 967                 if ((XftPatternGetInteger(f->match->pattern, "weight", 0,
 968                     &haveattr) != XftResultMatch) || haveattr != wantattr) {
 969                         f->badweight = 1;
 970                         fputs("font weight does not match\n", stderr);
 971                 }
 972         }
 973
 974         XftTextExtentsUtf8(xw.dpy, f->match,
 975                 (const FcChar8 *) ascii_printable,
 976                 strlen(ascii_printable), &extents);
 977
 978         f->set = NULL;
 979         f->pattern = configured;
 980
 981         f->ascent = f->match->ascent;
 982         f->descent = f->match->descent;
 983         f->lbearing = 0;
 984         f->rbearing = f->match->max_advance_width;
 985
 986         f->height = f->ascent + f->descent;
 987         f->width = DIVCEIL(extents.xOff, strlen(ascii_printable));
 988
 989         return 0;
 990 }
 991
 992 void
 993 xloadfonts(const char *fontstr, double fontsize)
 994 {
 995         FcPattern *pattern;
 996         double fontval;
 997
 998         if (fontstr[0] == '-')
 999                 pattern = XftXlfdParse(fontstr, False, False);
1000         else
1001                 pattern = FcNameParse((const FcChar8 *)fontstr);
1002
1003         if (!pattern)
1004                 die("can't open font %s\n", fontstr);
1005
1006         if (fontsize > 1) {
1007                 FcPatternDel(pattern, FC_PIXEL_SIZE);
1008                 FcPatternDel(pattern, FC_SIZE);
1009                 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
1010                 usedfontsize = fontsize;
1011         } else {
1012                 if (FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval) ==
1013                                 FcResultMatch) {
1014                         usedfontsize = fontval;
1015                 } else if (FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval) ==
1016                                 FcResultMatch) {
1017                         usedfontsize = -1;
1018                 } else {
1019                         /*
1020                          * Default font size is 12, if none given. This is to
1021                          * have a known usedfontsize value.
1022                          */
1023                         FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
1024                         usedfontsize = 12;
1025                 }
1026                 defaultfontsize = usedfontsize;
1027         }
1028
1029         if (xloadfont(&dc.font, pattern))
1030                 die("can't open font %s\n", fontstr);
1031
1032         if (usedfontsize < 0) {
1033                 FcPatternGetDouble(dc.font.match->pattern,
1034                                    FC_PIXEL_SIZE, 0, &fontval);
1035                 usedfontsize = fontval;
1036                 if (fontsize == 0)
1037                         defaultfontsize = fontval;
1038         }
1039
1040         /* Setting character width and height. */
1041         win.cw = ceilf(dc.font.width * cwscale);
1042         win.ch = ceilf(dc.font.height * chscale);
1043
1044         FcPatternDel(pattern, FC_SLANT);
1045         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
1046         if (xloadfont(&dc.ifont, pattern))
1047                 die("can't open font %s\n", fontstr);
1048
1049         FcPatternDel(pattern, FC_WEIGHT);
1050         FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
1051         if (xloadfont(&dc.ibfont, pattern))
1052                 die("can't open font %s\n", fontstr);
1053
1054         FcPatternDel(pattern, FC_SLANT);
1055         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
1056         if (xloadfont(&dc.bfont, pattern))
1057                 die("can't open font %s\n", fontstr);
1058
1059         FcPatternDestroy(pattern);
1060 }
1061
1062 void
1063 xunloadfont(Font *f)
1064 {
1065         XftFontClose(xw.dpy, f->match);
1066         FcPatternDestroy(f->pattern);
1067         if (f->set)
1068                 FcFontSetDestroy(f->set);
1069 }
1070
1071 void
1072 xunloadfonts(void)
1073 {
1074         /* Free the loaded fonts in the font cache.  */
1075         while (frclen > 0)
1076                 XftFontClose(xw.dpy, frc[--frclen].font);
1077
1078         xunloadfont(&dc.font);
1079         xunloadfont(&dc.bfont);
1080         xunloadfont(&dc.ifont);
1081         xunloadfont(&dc.ibfont);
1082 }
1083
1084 int
1085 ximopen(Display *dpy)
1086 {
1087         XIMCallback imdestroy = { .client_data = NULL, .callback = ximdestroy };
1088         XICCallback icdestroy = { .client_data = NULL, .callback = xicdestroy };
1089
1090         xw.ime.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
1091         if (xw.ime.xim == NULL)
1092                 return 0;
1093
1094         if (XSetIMValues(xw.ime.xim, XNDestroyCallback, &imdestroy, NULL))
1095                 fprintf(stderr, "XSetIMValues: "
1096                                 "Could not set XNDestroyCallback.\n");
1097
1098         xw.ime.spotlist = XVaCreateNestedList(0, XNSpotLocation, &xw.ime.spot,
1099                                               NULL);
1100
1101         if (xw.ime.xic == NULL) {
1102                 xw.ime.xic = XCreateIC(xw.ime.xim, XNInputStyle,
1103                                        XIMPreeditNothing | XIMStatusNothing,
1104                                        XNClientWindow, xw.win,
1105                                        XNDestroyCallback, &icdestroy,
1106                                        NULL);
1107         }
1108         if (xw.ime.xic == NULL)
1109                 fprintf(stderr, "XCreateIC: Could not create input context.\n");
1110
1111         return 1;
1112 }
1113
1114 void
1115 ximinstantiate(Display *dpy, XPointer client, XPointer call)
1116 {
1117         if (ximopen(dpy))
1118                 XUnregisterIMInstantiateCallback(xw.dpy, NULL, NULL, NULL,
1119                                                  ximinstantiate, NULL);
1120 }
1121
1122 void
1123 ximdestroy(XIM xim, XPointer client, XPointer call)
1124 {
1125         xw.ime.xim = NULL;
1126         XRegisterIMInstantiateCallback(xw.dpy, NULL, NULL, NULL,
1127                                        ximinstantiate, NULL);
1128         XFree(xw.ime.spotlist);
1129 }
1130
1131 int
1132 xicdestroy(XIC xim, XPointer client, XPointer call)
1133 {
1134         xw.ime.xic = NULL;
1135         return 1;
1136 }
1137
1138 void
1139 xinit(int cols, int rows)
1140 {
1141         XGCValues gcvalues;
1142         Cursor cursor;
1143         Window parent;
1144         pid_t thispid = getpid();
1145         XColor xmousefg, xmousebg;
1146         XWindowAttributes attr;
1147         XVisualInfo vis;
1148
1149         if (!(xw.dpy = XOpenDisplay(NULL)))
1150                 die("can't open display\n");
1151         xw.scr = XDefaultScreen(xw.dpy);
1152
1153         if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0)))) {
1154                 parent = XRootWindow(xw.dpy, xw.scr);
1155                 xw.depth = 32;
1156         } else {
1157                 XGetWindowAttributes(xw.dpy, parent, &attr);
1158                 xw.depth = attr.depth;
1159         }
1160
1161         XMatchVisualInfo(xw.dpy, xw.scr, xw.depth, TrueColor, &vis);
1162         xw.vis = vis.visual;
1163
1164         /* font */
1165         if (!FcInit())
1166                 die("could not init fontconfig.\n");
1167
1168         usedfont = (opt_font == NULL)? font : opt_font;
1169         xloadfonts(usedfont, 0);
1170
1171         /* colors */
1172         xw.cmap = XCreateColormap(xw.dpy, parent, xw.vis, None);
1173         xloadcols();
1174
1175         /* adjust fixed window geometry */
1176         win.w = 2 * borderpx + cols * win.cw;
1177         win.h = 2 * borderpx + rows * win.ch;
1178         if (xw.gm & XNegative)
1179                 xw.l += DisplayWidth(xw.dpy, xw.scr) - win.w - 2;
1180         if (xw.gm & YNegative)
1181                 xw.t += DisplayHeight(xw.dpy, xw.scr) - win.h - 2;
1182
1183         /* Events */
1184         xw.attrs.background_pixel = dc.col[defaultbg].pixel;
1185         xw.attrs.border_pixel = dc.col[defaultbg].pixel;
1186         xw.attrs.bit_gravity = NorthWestGravity;
1187         xw.attrs.event_mask = FocusChangeMask | KeyPressMask | KeyReleaseMask
1188                 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1189                 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
1190         xw.attrs.colormap = xw.cmap;
1191
1192         xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
1193                         win.w, win.h, 0, xw.depth, InputOutput,
1194                         xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
1195                         | CWEventMask | CWColormap, &xw.attrs);
1196
1197         memset(&gcvalues, 0, sizeof(gcvalues));
1198         gcvalues.graphics_exposures = False;
1199         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h, xw.depth);
1200         dc.gc = XCreateGC(xw.dpy, xw.buf, GCGraphicsExposures, &gcvalues);
1201         XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
1202         XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, win.w, win.h);
1203
1204         /* font spec buffer */
1205         xw.specbuf = xmalloc(cols * sizeof(GlyphFontSpec));
1206
1207         /* Xft rendering context */
1208         xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
1209
1210         /* input methods */
1211         if (!ximopen(xw.dpy)) {
1212                 XRegisterIMInstantiateCallback(xw.dpy, NULL, NULL, NULL,
1213                                                ximinstantiate, NULL);
1214         }
1215
1216         /* white cursor, black outline */
1217         cursor = XCreateFontCursor(xw.dpy, mouseshape);
1218         XDefineCursor(xw.dpy, xw.win, cursor);
1219
1220         if (XParseColor(xw.dpy, xw.cmap, colorname[mousefg], &xmousefg) == 0) {
1221                 xmousefg.red   = 0xffff;
1222                 xmousefg.green = 0xffff;
1223                 xmousefg.blue  = 0xffff;
1224         }
1225
1226         if (XParseColor(xw.dpy, xw.cmap, colorname[mousebg], &xmousebg) == 0) {
1227                 xmousebg.red   = 0x0000;
1228                 xmousebg.green = 0x0000;
1229                 xmousebg.blue  = 0x0000;
1230         }
1231
1232         XRecolorCursor(xw.dpy, cursor, &xmousefg, &xmousebg);
1233
1234         xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
1235         xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
1236         xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
1237         xw.netwmiconname = XInternAtom(xw.dpy, "_NET_WM_ICON_NAME", False);
1238         XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
1239
1240         xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
1241         XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
1242                         PropModeReplace, (uchar *)&thispid, 1);
1243
1244         win.mode = MODE_NUMLOCK;
1245         resettitle();
1246         xhints();
1247         XMapWindow(xw.dpy, xw.win);
1248         XSync(xw.dpy, False);
1249
1250         clock_gettime(CLOCK_MONOTONIC, &xsel.tclick1);
1251         clock_gettime(CLOCK_MONOTONIC, &xsel.tclick2);
1252         xsel.primary = NULL;
1253         xsel.clipboard = NULL;
1254         xsel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
1255         if (xsel.xtarget == None)
1256                 xsel.xtarget = XA_STRING;
1257 }
1258
1259 int
1260 xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x, int y)
1261 {
1262         float winx = borderpx + x * win.cw, winy = borderpx + y * win.ch, xp, yp;
1263         ushort mode, prevmode = USHRT_MAX;
1264         Font *font = &dc.font;
1265         int frcflags = FRC_NORMAL;
1266         float runewidth = win.cw;
1267         Rune rune;
1268         FT_UInt glyphidx;
1269         FcResult fcres;
1270         FcPattern *fcpattern, *fontpattern;
1271         FcFontSet *fcsets[] = { NULL };
1272         FcCharSet *fccharset;
1273         int i, f, numspecs = 0;
1274
1275         for (i = 0, xp = winx, yp = winy + font->ascent; i < len; ++i) {
1276                 /* Fetch rune and mode for current glyph. */
1277                 rune = glyphs[i].u;
1278                 mode = glyphs[i].mode;
1279
1280                 /* Skip dummy wide-character spacing. */
1281                 if (mode == ATTR_WDUMMY)
1282                         continue;
1283
1284                 /* Determine font for glyph if different from previous glyph. */
1285                 if (prevmode != mode) {
1286                         prevmode = mode;
1287                         font = &dc.font;
1288                         frcflags = FRC_NORMAL;
1289                         runewidth = win.cw * ((mode & ATTR_WIDE) ? 2.0f : 1.0f);
1290                         if ((mode & ATTR_ITALIC) && (mode & ATTR_BOLD)) {
1291                                 font = &dc.ibfont;
1292                                 frcflags = FRC_ITALICBOLD;
1293                         } else if (mode & ATTR_ITALIC) {
1294                                 font = &dc.ifont;
1295                                 frcflags = FRC_ITALIC;
1296                         } else if (mode & ATTR_BOLD) {
1297                                 font = &dc.bfont;
1298                                 frcflags = FRC_BOLD;
1299                         }
1300                         yp = winy + font->ascent;
1301                 }
1302
1303                 /* Lookup character index with default font. */
1304                 glyphidx = XftCharIndex(xw.dpy, font->match, rune);
1305                 if (glyphidx) {
1306                         specs[numspecs].font = font->match;
1307                         specs[numspecs].glyph = glyphidx;
1308                         specs[numspecs].x = (short)xp;
1309                         specs[numspecs].y = (short)yp;
1310                         xp += runewidth;
1311                         numspecs++;
1312                         continue;
1313                 }
1314
1315                 /* Fallback on font cache, search the font cache for match. */
1316                 for (f = 0; f < frclen; f++) {
1317                         glyphidx = XftCharIndex(xw.dpy, frc[f].font, rune);
1318                         /* Everything correct. */
1319                         if (glyphidx && frc[f].flags == frcflags)
1320                                 break;
1321                         /* We got a default font for a not found glyph. */
1322                         if (!glyphidx && frc[f].flags == frcflags
1323                                         && frc[f].unicodep == rune) {
1324                                 break;
1325                         }
1326                 }
1327
1328                 /* Nothing was found. Use fontconfig to find matching font. */
1329                 if (f >= frclen) {
1330                         if (!font->set)
1331                                 font->set = FcFontSort(0, font->pattern,
1332                                                        1, 0, &fcres);
1333                         fcsets[0] = font->set;
1334
1335                         /*
1336                          * Nothing was found in the cache. Now use
1337                          * some dozen of Fontconfig calls to get the
1338                          * font for one single character.
1339                          *
1340                          * Xft and fontconfig are design failures.
1341                          */
1342                         fcpattern = FcPatternDuplicate(font->pattern);
1343                         fccharset = FcCharSetCreate();
1344
1345                         FcCharSetAddChar(fccharset, rune);
1346                         FcPatternAddCharSet(fcpattern, FC_CHARSET,
1347                                         fccharset);
1348                         FcPatternAddBool(fcpattern, FC_SCALABLE, 1);
1349
1350                         FcConfigSubstitute(0, fcpattern,
1351                                         FcMatchPattern);
1352                         FcDefaultSubstitute(fcpattern);
1353
1354                         fontpattern = FcFontSetMatch(0, fcsets, 1,
1355                                         fcpattern, &fcres);
1356
1357                         /* Allocate memory for the new cache entry. */
1358                         if (frclen >= frccap) {
1359                                 frccap += 16;
1360                                 frc = xrealloc(frc, frccap * sizeof(Fontcache));
1361                         }
1362
1363                         frc[frclen].font = XftFontOpenPattern(xw.dpy,
1364                                         fontpattern);
1365                         if (!frc[frclen].font)
1366                                 die("XftFontOpenPattern failed seeking fallback font: %s\n",
1367                                         strerror(errno));
1368                         frc[frclen].flags = frcflags;
1369                         frc[frclen].unicodep = rune;
1370
1371                         glyphidx = XftCharIndex(xw.dpy, frc[frclen].font, rune);
1372
1373                         f = frclen;
1374                         frclen++;
1375
1376                         FcPatternDestroy(fcpattern);
1377                         FcCharSetDestroy(fccharset);
1378                 }
1379
1380                 specs[numspecs].font = frc[f].font;
1381                 specs[numspecs].glyph = glyphidx;
1382                 specs[numspecs].x = (short)xp;
1383                 specs[numspecs].y = (short)yp;
1384                 xp += runewidth;
1385                 numspecs++;
1386         }
1387
1388         return numspecs;
1389 }
1390
1391 void
1392 xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, int y)
1393 {
1394         int charlen = len * ((base.mode & ATTR_WIDE) ? 2 : 1);
1395         int winx = borderpx + x * win.cw, winy = borderpx + y * win.ch,
1396             width = charlen * win.cw;
1397         Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
1398         XRenderColor colfg, colbg;
1399         XRectangle r;
1400
1401         /* Fallback on color display for attributes not supported by the font */
1402         if (base.mode & ATTR_ITALIC && base.mode & ATTR_BOLD) {
1403                 if (dc.ibfont.badslant || dc.ibfont.badweight)
1404                         base.fg = defaultattr;
1405         } else if ((base.mode & ATTR_ITALIC && dc.ifont.badslant) ||
1406             (base.mode & ATTR_BOLD && dc.bfont.badweight)) {
1407                 base.fg = defaultattr;
1408         }
1409
1410         if (IS_TRUECOL(base.fg)) {
1411                 colfg.alpha = 0xffff;
1412                 colfg.red = TRUERED(base.fg);
1413                 colfg.green = TRUEGREEN(base.fg);
1414                 colfg.blue = TRUEBLUE(base.fg);
1415                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
1416                 fg = &truefg;
1417         } else {
1418                 fg = &dc.col[base.fg];
1419         }
1420
1421         if (IS_TRUECOL(base.bg)) {
1422                 colbg.alpha = 0xffff;
1423                 colbg.green = TRUEGREEN(base.bg);
1424                 colbg.red = TRUERED(base.bg);
1425                 colbg.blue = TRUEBLUE(base.bg);
1426                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
1427                 bg = &truebg;
1428         } else {
1429                 bg = &dc.col[base.bg];
1430         }
1431
1432         /* Change basic system colors [0-7] to bright system colors [8-15] */
1433         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_BOLD && BETWEEN(base.fg, 0, 7))
1434                 fg = &dc.col[base.fg + 8];
1435
1436         if (IS_SET(MODE_REVERSE)) {
1437                 if (fg == &dc.col[defaultfg]) {
1438                         fg = &dc.col[defaultbg];
1439                 } else {
1440                         colfg.red = ~fg->color.red;
1441                         colfg.green = ~fg->color.green;
1442                         colfg.blue = ~fg->color.blue;
1443                         colfg.alpha = fg->color.alpha;
1444                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
1445                                         &revfg);
1446                         fg = &revfg;
1447                 }
1448
1449                 if (bg == &dc.col[defaultbg]) {
1450                         bg = &dc.col[defaultfg];
1451                 } else {
1452                         colbg.red = ~bg->color.red;
1453                         colbg.green = ~bg->color.green;
1454                         colbg.blue = ~bg->color.blue;
1455                         colbg.alpha = bg->color.alpha;
1456                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
1457                                         &revbg);
1458                         bg = &revbg;
1459                 }
1460         }
1461
1462         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_FAINT) {
1463                 colfg.red = fg->color.red / 2;
1464                 colfg.green = fg->color.green / 2;
1465                 colfg.blue = fg->color.blue / 2;
1466                 colfg.alpha = fg->color.alpha;
1467                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
1468                 fg = &revfg;
1469         }
1470
1471         if (base.mode & ATTR_REVERSE) {
1472                 temp = fg;
1473                 fg = bg;
1474                 bg = temp;
1475         }
1476
1477         if (base.mode & ATTR_BLINK && win.mode & MODE_BLINK)
1478                 fg = bg;
1479
1480         if (base.mode & ATTR_INVISIBLE)
1481                 fg = bg;
1482
1483         /* Intelligent cleaning up of the borders. */
1484         if (x == 0) {
1485                 xclear(0, (y == 0)? 0 : winy, borderpx,
1486                         winy + win.ch +
1487                         ((winy + win.ch >= borderpx + win.th)? win.h : 0));
1488         }
1489         if (winx + width >= borderpx + win.tw) {
1490                 xclear(winx + width, (y == 0)? 0 : winy, win.w,
1491                         ((winy + win.ch >= borderpx + win.th)? win.h : (winy + win.ch)));
1492         }
1493         if (y == 0)
1494                 xclear(winx, 0, winx + width, borderpx);
1495         if (winy + win.ch >= borderpx + win.th)
1496                 xclear(winx, winy + win.ch, winx + width, win.h);
1497
1498         /* Clean up the region we want to draw to. */
1499         XftDrawRect(xw.draw, bg, winx, winy, width, win.ch);
1500
1501         /* Set the clip region because Xft is sometimes dirty. */
1502         r.x = 0;
1503         r.y = 0;
1504         r.height = win.ch;
1505         r.width = width;
1506         XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
1507
1508         /* Render the glyphs. */
1509         XftDrawGlyphFontSpec(xw.draw, fg, specs, len);
1510
1511         /* Render underline and strikethrough. */
1512         if (base.mode & ATTR_UNDERLINE) {
1513                 XftDrawRect(xw.draw, fg, winx, winy + dc.font.ascent * chscale + 1,
1514                                 width, 1);
1515         }
1516
1517         if (base.mode & ATTR_STRUCK) {
1518                 XftDrawRect(xw.draw, fg, winx, winy + 2 * dc.font.ascent * chscale / 3,
1519                                 width, 1);
1520         }
1521
1522         /* Reset clip to none. */
1523         XftDrawSetClip(xw.draw, 0);
1524 }
1525
1526 void
1527 xdrawglyph(Glyph g, int x, int y)
1528 {
1529         int numspecs;
1530         XftGlyphFontSpec spec;
1531
1532         numspecs = xmakeglyphfontspecs(&spec, &g, 1, x, y);
1533         xdrawglyphfontspecs(&spec, g, numspecs, x, y);
1534 }
1535
1536 void
1537 xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og)
1538 {
1539         Color drawcol;
1540
1541         /* remove the old cursor */
1542         if (selected(ox, oy))
1543                 og.mode ^= ATTR_REVERSE;
1544         xdrawglyph(og, ox, oy);
1545
1546         if (IS_SET(MODE_HIDE))
1547                 return;
1548
1549         /*
1550          * Select the right color for the right mode.
1551          */
1552         g.mode &= ATTR_BOLD|ATTR_ITALIC|ATTR_UNDERLINE|ATTR_STRUCK|ATTR_WIDE;
1553
1554         if (IS_SET(MODE_REVERSE)) {
1555                 g.mode |= ATTR_REVERSE;
1556                 g.bg = defaultfg;
1557                 if (selected(cx, cy)) {
1558                         drawcol = dc.col[defaultcs];
1559                         g.fg = defaultrcs;
1560                 } else {
1561                         drawcol = dc.col[defaultrcs];
1562                         g.fg = defaultcs;
1563                 }
1564         } else {
1565                 if (selected(cx, cy)) {
1566                         g.fg = defaultfg;
1567                         g.bg = defaultrcs;
1568                 } else {
1569                         g.fg = defaultbg;
1570                         g.bg = defaultcs;
1571                 }
1572                 drawcol = dc.col[g.bg];
1573         }
1574
1575         /* draw the new one */
1576         if (IS_SET(MODE_FOCUSED)) {
1577                 switch (win.cursor) {
1578                 case 7: /* st extension */
1579                         g.u = 0x2603; /* snowman (U+2603) */
1580                         /* FALLTHROUGH */
1581                 case 0: /* Blinking Block */
1582                 case 1: /* Blinking Block (Default) */
1583                 case 2: /* Steady Block */
1584                         xdrawglyph(g, cx, cy);
1585                         break;
1586                 case 3: /* Blinking Underline */
1587                 case 4: /* Steady Underline */
1588                         XftDrawRect(xw.draw, &drawcol,
1589                                         borderpx + cx * win.cw,
1590                                         borderpx + (cy + 1) * win.ch - \
1591                                                 cursorthickness,
1592                                         win.cw, cursorthickness);
1593                         break;
1594                 case 5: /* Blinking bar */
1595                 case 6: /* Steady bar */
1596                         XftDrawRect(xw.draw, &drawcol,
1597                                         borderpx + cx * win.cw,
1598                                         borderpx + cy * win.ch,
1599                                         cursorthickness, win.ch);
1600                         break;
1601                 }
1602         } else {
1603                 XftDrawRect(xw.draw, &drawcol,
1604                                 borderpx + cx * win.cw,
1605                                 borderpx + cy * win.ch,
1606                                 win.cw - 1, 1);
1607                 XftDrawRect(xw.draw, &drawcol,
1608                                 borderpx + cx * win.cw,
1609                                 borderpx + cy * win.ch,
1610                                 1, win.ch - 1);
1611                 XftDrawRect(xw.draw, &drawcol,
1612                                 borderpx + (cx + 1) * win.cw - 1,
1613                                 borderpx + cy * win.ch,
1614                                 1, win.ch - 1);
1615                 XftDrawRect(xw.draw, &drawcol,
1616                                 borderpx + cx * win.cw,
1617                                 borderpx + (cy + 1) * win.ch - 1,
1618                                 win.cw, 1);
1619         }
1620 }
1621
1622 void
1623 xsetenv(void)
1624 {
1625         char buf[sizeof(long) * 8 + 1];
1626
1627         snprintf(buf, sizeof(buf), "%lu", xw.win);
1628         setenv("WINDOWID", buf, 1);
1629 }
1630
1631 void
1632 xseticontitle(char *p)
1633 {
1634         XTextProperty prop;
1635         DEFAULT(p, opt_title);
1636
1637         if (Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
1638                                         &prop) != Success)
1639                 return;
1640         XSetWMIconName(xw.dpy, xw.win, &prop);
1641         XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmiconname);
1642         XFree(prop.value);
1643 }
1644
1645 void
1646 xsettitle(char *p)
1647 {
1648         XTextProperty prop;
1649         DEFAULT(p, opt_title);
1650
1651         if (Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
1652                                         &prop) != Success)
1653                 return;
1654         XSetWMName(xw.dpy, xw.win, &prop);
1655         XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
1656         XFree(prop.value);
1657 }
1658
1659 int
1660 xstartdraw(void)
1661 {
1662         return IS_SET(MODE_VISIBLE);
1663 }
1664
1665 void
1666 xdrawline(Line line, int x1, int y1, int x2)
1667 {
1668         int i, x, ox, numspecs;
1669         Glyph base, new;
1670         XftGlyphFontSpec *specs = xw.specbuf;
1671
1672         numspecs = xmakeglyphfontspecs(specs, &line[x1], x2 - x1, x1, y1);
1673         i = ox = 0;
1674         for (x = x1; x < x2 && i < numspecs; x++) {
1675                 new = line[x];
1676                 if (new.mode == ATTR_WDUMMY)
1677                         continue;
1678                 if (selected(x, y1))
1679                         new.mode ^= ATTR_REVERSE;
1680                 if (i > 0 && ATTRCMP(base, new)) {
1681                         xdrawglyphfontspecs(specs, base, i, ox, y1);
1682                         specs += i;
1683                         numspecs -= i;
1684                         i = 0;
1685                 }
1686                 if (i == 0) {
1687                         ox = x;
1688                         base = new;
1689                 }
1690                 i++;
1691         }
1692         if (i > 0)
1693                 xdrawglyphfontspecs(specs, base, i, ox, y1);
1694 }
1695
1696 void
1697 xfinishdraw(void)
1698 {
1699         XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, win.w,
1700                         win.h, 0, 0);
1701         XSetForeground(xw.dpy, dc.gc,
1702                         dc.col[IS_SET(MODE_REVERSE)?
1703                                 defaultfg : defaultbg].pixel);
1704 }
1705
1706 void
1707 xximspot(int x, int y)
1708 {
1709         if (xw.ime.xic == NULL)
1710                 return;
1711
1712         xw.ime.spot.x = borderpx + x * win.cw;
1713         xw.ime.spot.y = borderpx + (y + 1) * win.ch;
1714
1715         XSetICValues(xw.ime.xic, XNPreeditAttributes, xw.ime.spotlist, NULL);
1716 }
1717
1718 void
1719 expose(XEvent *ev)
1720 {
1721         redraw();
1722 }
1723
1724 void
1725 visibility(XEvent *ev)
1726 {
1727         XVisibilityEvent *e = &ev->xvisibility;
1728
1729         MODBIT(win.mode, e->state != VisibilityFullyObscured, MODE_VISIBLE);
1730 }
1731
1732 void
1733 unmap(XEvent *ev)
1734 {
1735         win.mode &= ~MODE_VISIBLE;
1736 }
1737
1738 void
1739 xsetpointermotion(int set)
1740 {
1741         MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
1742         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
1743 }
1744
1745 void
1746 xsetmode(int set, unsigned int flags)
1747 {
1748         int mode = win.mode;
1749         MODBIT(win.mode, set, flags);
1750         if ((win.mode & MODE_REVERSE) != (mode & MODE_REVERSE))
1751                 redraw();
1752 }
1753
1754 int
1755 xsetcursor(int cursor)
1756 {
1757         if (!BETWEEN(cursor, 0, 7)) /* 7: st extension */
1758                 return 1;
1759         win.cursor = cursor;
1760         return 0;
1761 }
1762
1763 void
1764 xseturgency(int add)
1765 {
1766         XWMHints *h = XGetWMHints(xw.dpy, xw.win);
1767
1768         MODBIT(h->flags, add, XUrgencyHint);
1769         XSetWMHints(xw.dpy, xw.win, h);
1770         XFree(h);
1771 }
1772
1773 void
1774 xbell(void)
1775 {
1776         if (!(IS_SET(MODE_FOCUSED)))
1777                 xseturgency(1);
1778         if (bellvolume)
1779                 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
1780 }
1781
1782 void
1783 focus(XEvent *ev)
1784 {
1785         XFocusChangeEvent *e = &ev->xfocus;
1786
1787         if (e->mode == NotifyGrab)
1788                 return;
1789
1790         if (ev->type == FocusIn) {
1791                 if (xw.ime.xic)
1792                         XSetICFocus(xw.ime.xic);
1793                 win.mode |= MODE_FOCUSED;
1794                 xseturgency(0);
1795                 if (IS_SET(MODE_FOCUS))
1796                         ttywrite("\033[I", 3, 0);
1797         } else {
1798                 if (xw.ime.xic)
1799                         XUnsetICFocus(xw.ime.xic);
1800                 win.mode &= ~MODE_FOCUSED;
1801                 if (IS_SET(MODE_FOCUS))
1802                         ttywrite("\033[O", 3, 0);
1803         }
1804 }
1805
1806 int
1807 match(uint mask, uint state)
1808 {
1809         return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
1810 }
1811
1812 char*
1813 kmap(KeySym k, uint state)
1814 {
1815         Key *kp;
1816         int i;
1817
1818         /* Check for mapped keys out of X11 function keys. */
1819         for (i = 0; i < LEN(mappedkeys); i++) {
1820                 if (mappedkeys[i] == k)
1821                         break;
1822         }
1823         if (i == LEN(mappedkeys)) {
1824                 if ((k & 0xFFFF) < 0xFD00)
1825                         return NULL;
1826         }
1827
1828         for (kp = key; kp < key + LEN(key); kp++) {
1829                 if (kp->k != k)
1830                         continue;
1831
1832                 if (!match(kp->mask, state))
1833                         continue;
1834
1835                 if (IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
1836                         continue;
1837                 if (IS_SET(MODE_NUMLOCK) && kp->appkey == 2)
1838                         continue;
1839
1840                 if (IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
1841                         continue;
1842
1843                 return kp->s;
1844         }
1845
1846         return NULL;
1847 }
1848
1849 void
1850 kpress(XEvent *ev)
1851 {
1852         XKeyEvent *e = &ev->xkey;
1853         KeySym ksym;
1854         char buf[64], *customkey;
1855         int len;
1856         Rune c;
1857         Status status;
1858         Shortcut *bp;
1859
1860         if (IS_SET(MODE_KBDLOCK))
1861                 return;
1862
1863         if (xw.ime.xic)
1864                 len = XmbLookupString(xw.ime.xic, e, buf, sizeof buf, &ksym, &status);
1865         else
1866                 len = XLookupString(e, buf, sizeof buf, &ksym, NULL);
1867         /* 1. shortcuts */
1868         for (bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
1869                 if (ksym == bp->keysym && match(bp->mod, e->state)) {
1870                         bp->func(&(bp->arg));
1871                         return;
1872                 }
1873         }
1874
1875         /* 2. custom keys from config.h */
1876         if ((customkey = kmap(ksym, e->state))) {
1877                 ttywrite(customkey, strlen(customkey), 1);
1878                 return;
1879         }
1880
1881         /* 3. composed string from input method */
1882         if (len == 0)
1883                 return;
1884         if (len == 1 && e->state & Mod1Mask) {
1885                 if (IS_SET(MODE_8BIT)) {
1886                         if (*buf < 0177) {
1887                                 c = *buf | 0x80;
1888                                 len = utf8encode(c, buf);
1889                         }
1890                 } else {
1891                         buf[1] = buf[0];
1892                         buf[0] = '\033';
1893                         len = 2;
1894                 }
1895         }
1896         ttywrite(buf, len, 1);
1897 }
1898
1899 void
1900 cmessage(XEvent *e)
1901 {
1902         /*
1903          * See xembed specs
1904          *  http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
1905          */
1906         if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
1907                 if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
1908                         win.mode |= MODE_FOCUSED;
1909                         xseturgency(0);
1910                 } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
1911                         win.mode &= ~MODE_FOCUSED;
1912                 }
1913         } else if (e->xclient.data.l[0] == xw.wmdeletewin) {
1914                 ttyhangup();
1915                 exit(0);
1916         }
1917 }
1918
1919 void
1920 resize(XEvent *e)
1921 {
1922         if (e->xconfigure.width == win.w && e->xconfigure.height == win.h)
1923                 return;
1924
1925         cresize(e->xconfigure.width, e->xconfigure.height);
1926 }
1927
1928 void
1929 run(void)
1930 {
1931         XEvent ev;
1932         int w = win.w, h = win.h;
1933         fd_set rfd;
1934         int xfd = XConnectionNumber(xw.dpy), ttyfd, xev, drawing;
1935         struct timespec seltv, *tv, now, lastblink, trigger;
1936         double timeout;
1937
1938         /* Waiting for window mapping */
1939         do {
1940                 XNextEvent(xw.dpy, &ev);
1941                 /*
1942                  * This XFilterEvent call is required because of XOpenIM. It
1943                  * does filter out the key event and some client message for
1944                  * the input method too.
1945                  */
1946                 if (XFilterEvent(&ev, None))
1947                         continue;
1948                 if (ev.type == ConfigureNotify) {
1949                         w = ev.xconfigure.width;
1950                         h = ev.xconfigure.height;
1951                 }
1952         } while (ev.type != MapNotify);
1953
1954         ttyfd = ttynew(opt_line, shell, opt_io, opt_cmd);
1955         cresize(w, h);
1956
1957         for (timeout = -1, drawing = 0, lastblink = (struct timespec){0};;) {
1958                 FD_ZERO(&rfd);
1959                 FD_SET(ttyfd, &rfd);
1960                 FD_SET(xfd, &rfd);
1961
1962                 if (XPending(xw.dpy))
1963                         timeout = 0;  /* existing events might not set xfd */
1964
1965                 seltv.tv_sec = timeout / 1E3;
1966                 seltv.tv_nsec = 1E6 * (timeout - 1E3 * seltv.tv_sec);
1967                 tv = timeout >= 0 ? &seltv : NULL;
1968
1969                 if (pselect(MAX(xfd, ttyfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
1970                         if (errno == EINTR)
1971                                 continue;
1972                         die("select failed: %s\n", strerror(errno));
1973                 }
1974                 clock_gettime(CLOCK_MONOTONIC, &now);
1975
1976                 if (FD_ISSET(ttyfd, &rfd))
1977                         ttyread();
1978
1979                 xev = 0;
1980                 while (XPending(xw.dpy)) {
1981                         xev = 1;
1982                         XNextEvent(xw.dpy, &ev);
1983                         if (XFilterEvent(&ev, None))
1984                                 continue;
1985                         if (handler[ev.type])
1986                                 (handler[ev.type])(&ev);
1987                 }
1988
1989                 /*
1990                  * To reduce flicker and tearing, when new content or event
1991                  * triggers drawing, we first wait a bit to ensure we got
1992                  * everything, and if nothing new arrives - we draw.
1993                  * We start with trying to wait minlatency ms. If more content
1994                  * arrives sooner, we retry with shorter and shorter periods,
1995                  * and eventually draw even without idle after maxlatency ms.
1996                  * Typically this results in low latency while interacting,
1997                  * maximum latency intervals during `cat huge.txt`, and perfect
1998                  * sync with periodic updates from animations/key-repeats/etc.
1999                  */
2000                 if (FD_ISSET(ttyfd, &rfd) || xev) {
2001                         if (!drawing) {
2002                                 trigger = now;
2003                                 drawing = 1;
2004                         }
2005                         timeout = (maxlatency - TIMEDIFF(now, trigger)) \
2006                                   / maxlatency * minlatency;
2007                         if (timeout > 0)
2008                                 continue;  /* we have time, try to find idle */
2009                 }
2010
2011                 /* idle detected or maxlatency exhausted -> draw */
2012                 timeout = -1;
2013                 if (blinktimeout && tattrset(ATTR_BLINK)) {
2014                         timeout = blinktimeout - TIMEDIFF(now, lastblink);
2015                         if (timeout <= 0) {
2016                                 if (-timeout > blinktimeout) /* start visible */
2017                                         win.mode |= MODE_BLINK;
2018                                 win.mode ^= MODE_BLINK;
2019                                 tsetdirtattr(ATTR_BLINK);
2020                                 lastblink = now;
2021                                 timeout = blinktimeout;
2022                         }
2023                 }
2024
2025                 draw();
2026                 XFlush(xw.dpy);
2027                 drawing = 0;
2028         }
2029 }
2030
2031 void
2032 usage(void)
2033 {
2034         die("usage: %s [-aiv] [-c class] [-f font] [-g geometry]"
2035             " [-n name] [-o file]\n"
2036             "          [-T title] [-t title] [-w windowid]"
2037             " [[-e] command [args ...]]\n"
2038             "       %s [-aiv] [-c class] [-f font] [-g geometry]"
2039             " [-n name] [-o file]\n"
2040             "          [-T title] [-t title] [-w windowid] -l line"
2041             " [stty_args ...]\n", argv0, argv0);
2042 }
2043
2044 int
2045 main(int argc, char *argv[])
2046 {
2047         xw.l = xw.t = 0;
2048         xw.isfixed = False;
2049         xsetcursor(cursorshape);
2050
2051         ARGBEGIN {
2052         case 'a':
2053                 allowaltscreen = 0;
2054                 break;
2055         case 'A':
2056                 opt_alpha = EARGF(usage());
2057                 break;
2058         case 'c':
2059                 opt_class = EARGF(usage());
2060                 break;
2061         case 'e':
2062                 if (argc > 0)
2063                         --argc, ++argv;
2064                 goto run;
2065         case 'f':
2066                 opt_font = EARGF(usage());
2067                 break;
2068         case 'g':
2069                 xw.gm = XParseGeometry(EARGF(usage()),
2070                                 &xw.l, &xw.t, &cols, &rows);
2071                 break;
2072         case 'i':
2073                 xw.isfixed = 1;
2074                 break;
2075         case 'o':
2076                 opt_io = EARGF(usage());
2077                 break;
2078         case 'l':
2079                 opt_line = EARGF(usage());
2080                 break;
2081         case 'n':
2082                 opt_name = EARGF(usage());
2083                 break;
2084         case 't':
2085         case 'T':
2086                 opt_title = EARGF(usage());
2087                 break;
2088         case 'w':
2089                 opt_embed = EARGF(usage());
2090                 break;
2091         case 'v':
2092                 die("%s " VERSION "\n", argv0);
2093                 break;
2094         default:
2095                 usage();
2096         } ARGEND;
2097
2098 run:
2099         if (argc > 0) /* eat all remaining arguments */
2100                 opt_cmd = argv;
2101
2102         if (!opt_title)
2103                 opt_title = (opt_line || !opt_cmd) ? "st" : opt_cmd[0];
2104
2105         setlocale(LC_CTYPE, "");
2106         XSetLocaleModifiers("");
2107         cols = MAX(cols, 1);
2108         rows = MAX(rows, 1);
2109         tnew(cols, rows);
2110         xinit(cols, rows);
2111         xsetenv();
2112         selinit();
2113         run();
2114
2115         return 0;
2116 }