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|1<<14)
  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 hborderpx, vborderpx;
  99         int ch; /* char height */
 100         int cw; /* char width  */
 101         int mode; /* window state/mode flags */
 102         int cursor; /* cursor style */
 103 } TermWindow;
 104
 105 typedef struct {
 106         Display *dpy;
 107         Colormap cmap;
 108         Window win;
 109         Drawable buf;
 110         GlyphFontSpec *specbuf; /* font spec buffer used for rendering */
 111         Atom xembed, wmdeletewin, netwmname, netwmiconname, netwmpid;
 112         struct {
 113                 XIM xim;
 114                 XIC xic;
 115                 XPoint spot;
 116                 XVaNestedList spotlist;
 117         } ime;
 118         Draw draw;
 119         Visual *vis;
 120         XSetWindowAttributes attrs;
 121         int scr;
 122         int isfixed; /* is fixed geometry? */
 123         int depth; /* bit depth */
 124         int l, t; /* left and top offset */
 125         int gm; /* geometry mask */
 126 } XWindow;
 127
 128 typedef struct {
 129         Atom xtarget;
 130         char *primary, *clipboard;
 131         struct timespec tclick1;
 132         struct timespec tclick2;
 133 } XSelection;
 134
 135 /* Font structure */
 136 #define Font Font_
 137 typedef struct {
 138         int height;
 139         int width;
 140         int ascent;
 141         int descent;
 142         int badslant;
 143         int badweight;
 144         short lbearing;
 145         short rbearing;
 146         XftFont *match;
 147         FcFontSet *set;
 148         FcPattern *pattern;
 149 } Font;
 150
 151 /* Drawing Context */
 152 typedef struct {
 153         Color *col;
 154         size_t collen;
 155         Font font, bfont, ifont, ibfont;
 156         GC gc;
 157 } DC;
 158
 159 static inline ushort sixd_to_16bit(int);
 160 static int xmakeglyphfontspecs(XftGlyphFontSpec *, const Glyph *, int, int, int);
 161 static void xdrawglyphfontspecs(const XftGlyphFontSpec *, Glyph, int, int, int);
 162 static void xdrawglyph(Glyph, int, int);
 163 static void xclear(int, int, int, int);
 164 static int xgeommasktogravity(int);
 165 static int ximopen(Display *);
 166 static void ximinstantiate(Display *, XPointer, XPointer);
 167 static void ximdestroy(XIM, XPointer, XPointer);
 168 static int xicdestroy(XIC, XPointer, XPointer);
 169 static void xinit(int, int);
 170 static void cresize(int, int);
 171 static void xresize(int, int);
 172 static void xhints(void);
 173 static int xloadcolor(int, const char *, Color *);
 174 static int xloadfont(Font *, FcPattern *);
 175 static void xloadfonts(const char *, double);
 176 static void xunloadfont(Font *);
 177 static void xunloadfonts(void);
 178 static void xsetenv(void);
 179 static void xseturgency(int);
 180 static int evcol(XEvent *);
 181 static int evrow(XEvent *);
 182
 183 static void expose(XEvent *);
 184 static void visibility(XEvent *);
 185 static void unmap(XEvent *);
 186 static void kpress(XEvent *);
 187 static void cmessage(XEvent *);
 188 static void resize(XEvent *);
 189 static void focus(XEvent *);
 190 static uint buttonmask(uint);
 191 static int mouseaction(XEvent *, uint);
 192 static void brelease(XEvent *);
 193 static void bpress(XEvent *);
 194 static void bmotion(XEvent *);
 195 static void propnotify(XEvent *);
 196 static void selnotify(XEvent *);
 197 static void selclear_(XEvent *);
 198 static void selrequest(XEvent *);
 199 static void setsel(char *, Time);
 200 static void mousesel(XEvent *, int);
 201 static void mousereport(XEvent *);
 202 static char *kmap(KeySym, uint);
 203 static int match(uint, uint);
 204
 205 static void run(void);
 206 static void usage(void);
 207
 208 static void (*handler[LASTEvent])(XEvent *) = {
 209         [KeyPress] = kpress,
 210         [ClientMessage] = cmessage,
 211         [ConfigureNotify] = resize,
 212         [VisibilityNotify] = visibility,
 213         [UnmapNotify] = unmap,
 214         [Expose] = expose,
 215         [FocusIn] = focus,
 216         [FocusOut] = focus,
 217         [MotionNotify] = bmotion,
 218         [ButtonPress] = bpress,
 219         [ButtonRelease] = brelease,
 220 /*
 221  * Uncomment if you want the selection to disappear when you select something
 222  * different in another window.
 223  */
 224 /*      [SelectionClear] = selclear_, */
 225         [SelectionNotify] = selnotify,
 226 /*
 227  * PropertyNotify is only turned on when there is some INCR transfer happening
 228  * for the selection retrieval.
 229  */
 230         [PropertyNotify] = propnotify,
 231         [SelectionRequest] = selrequest,
 232 };
 233
 234 /* Globals */
 235 static DC dc;
 236 static XWindow xw;
 237 static XSelection xsel;
 238 static TermWindow win;
 239
 240 /* Font Ring Cache */
 241 enum {
 242         FRC_NORMAL,
 243         FRC_ITALIC,
 244         FRC_BOLD,
 245         FRC_ITALICBOLD
 246 };
 247
 248 typedef struct {
 249         XftFont *font;
 250         int flags;
 251         Rune unicodep;
 252 } Fontcache;
 253
 254 /* Fontcache is an array now. A new font will be appended to the array. */
 255 static Fontcache *frc = NULL;
 256 static int frclen = 0;
 257 static int frccap = 0;
 258 static char *usedfont = NULL;
 259 static double usedfontsize = 0;
 260 static double defaultfontsize = 0;
 261
 262 static char *opt_alpha = NULL;
 263 static char *opt_class = NULL;
 264 static char **opt_cmd  = NULL;
 265 static char *opt_embed = NULL;
 266 static char *opt_font  = NULL;
 267 static char *opt_io    = NULL;
 268 static char *opt_line  = NULL;
 269 static char *opt_name  = NULL;
 270 static char *opt_title = NULL;
 271
 272 static uint buttons; /* bit field of pressed buttons */
 273
 274 void
 275 clipcopy(const Arg *dummy)
 276 {
 277         Atom clipboard;
 278
 279         free(xsel.clipboard);
 280         xsel.clipboard = NULL;
 281
 282         if (xsel.primary != NULL) {
 283                 xsel.clipboard = xstrdup(xsel.primary);
 284                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 285                 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
 286         }
 287 }
 288
 289 void
 290 clippaste(const Arg *dummy)
 291 {
 292         Atom clipboard;
 293
 294         clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 295         XConvertSelection(xw.dpy, clipboard, xsel.xtarget, clipboard,
 296                         xw.win, CurrentTime);
 297 }
 298
 299 void
 300 selpaste(const Arg *dummy)
 301 {
 302         XConvertSelection(xw.dpy, XA_PRIMARY, xsel.xtarget, XA_PRIMARY,
 303                         xw.win, CurrentTime);
 304 }
 305
 306 void
 307 numlock(const Arg *dummy)
 308 {
 309         win.mode ^= MODE_NUMLOCK;
 310 }
 311
 312 void
 313 zoom(const Arg *arg)
 314 {
 315         Arg larg;
 316
 317         larg.f = usedfontsize + arg->f;
 318         zoomabs(&larg);
 319 }
 320
 321 void
 322 zoomabs(const Arg *arg)
 323 {
 324         xunloadfonts();
 325         xloadfonts(usedfont, arg->f);
 326         cresize(0, 0);
 327         redraw();
 328         xhints();
 329 }
 330
 331 void
 332 zoomreset(const Arg *arg)
 333 {
 334         Arg larg;
 335
 336         if (defaultfontsize > 0) {
 337                 larg.f = defaultfontsize;
 338                 zoomabs(&larg);
 339         }
 340 }
 341
 342 void
 343 ttysend(const Arg *arg)
 344 {
 345         ttywrite(arg->s, strlen(arg->s), 1);
 346 }
 347
 348 int
 349 evcol(XEvent *e)
 350 {
 351         int x = e->xbutton.x - win.hborderpx;
 352         LIMIT(x, 0, win.tw - 1);
 353         return x / win.cw;
 354 }
 355
 356 int
 357 evrow(XEvent *e)
 358 {
 359         int y = e->xbutton.y - win.vborderpx;
 360         LIMIT(y, 0, win.th - 1);
 361         return y / win.ch;
 362 }
 363
 364 void
 365 mousesel(XEvent *e, int done)
 366 {
 367         int type, seltype = SEL_REGULAR;
 368         uint state = e->xbutton.state & ~(Button1Mask | forcemousemod);
 369
 370         for (type = 1; type < LEN(selmasks); ++type) {
 371                 if (match(selmasks[type], state)) {
 372                         seltype = type;
 373                         break;
 374                 }
 375         }
 376         selextend(evcol(e), evrow(e), seltype, done);
 377         if (done)
 378                 setsel(getsel(), e->xbutton.time);
 379 }
 380
 381 void
 382 mousereport(XEvent *e)
 383 {
 384         int len, btn, code;
 385         int x = evcol(e), y = evrow(e);
 386         int state = e->xbutton.state;
 387         char buf[40];
 388         static int ox, oy;
 389
 390         if (e->type == MotionNotify) {
 391                 if (x == ox && y == oy)
 392                         return;
 393                 if (!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
 394                         return;
 395                 /* MODE_MOUSEMOTION: no reporting if no button is pressed */
 396                 if (IS_SET(MODE_MOUSEMOTION) && buttons == 0)
 397                         return;
 398                 /* Set btn to lowest-numbered pressed button, or 12 if no
 399                  * buttons are pressed. */
 400                 for (btn = 1; btn <= 11 && !(buttons & (1<<(btn-1))); btn++)
 401                         ;
 402                 code = 32;
 403         } else {
 404                 btn = e->xbutton.button;
 405                 /* Only buttons 1 through 11 can be encoded */
 406                 if (btn < 1 || btn > 11)
 407                         return;
 408                 if (e->type == ButtonRelease) {
 409                         /* MODE_MOUSEX10: no button release reporting */
 410                         if (IS_SET(MODE_MOUSEX10))
 411                                 return;
 412                         /* Don't send release events for the scroll wheel */
 413                         if (btn == 4 || btn == 5)
 414                                 return;
 415                 }
 416                 code = 0;
 417         }
 418
 419         ox = x;
 420         oy = y;
 421
 422         /* Encode btn into code. If no button is pressed for a motion event in
 423          * MODE_MOUSEMANY, then encode it as a release. */
 424         if ((!IS_SET(MODE_MOUSESGR) && e->type == ButtonRelease) || btn == 12)
 425                 code += 3;
 426         else if (btn >= 8)
 427                 code += 128 + btn - 8;
 428         else if (btn >= 4)
 429                 code += 64 + btn - 4;
 430         else
 431                 code += btn - 1;
 432
 433         if (!IS_SET(MODE_MOUSEX10)) {
 434                 code += ((state & ShiftMask  ) ?  4 : 0)
 435                       + ((state & Mod1Mask   ) ?  8 : 0) /* meta key: alt */
 436                       + ((state & ControlMask) ? 16 : 0);
 437         }
 438
 439         if (IS_SET(MODE_MOUSESGR)) {
 440                 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
 441                                 code, x+1, y+1,
 442                                 e->type == ButtonRelease ? 'm' : 'M');
 443         } else if (x < 223 && y < 223) {
 444                 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
 445                                 32+code, 32+x+1, 32+y+1);
 446         } else {
 447                 return;
 448         }
 449
 450         ttywrite(buf, len, 0);
 451 }
 452
 453 uint
 454 buttonmask(uint button)
 455 {
 456         return button == Button1 ? Button1Mask
 457              : button == Button2 ? Button2Mask
 458              : button == Button3 ? Button3Mask
 459              : button == Button4 ? Button4Mask
 460              : button == Button5 ? Button5Mask
 461              : 0;
 462 }
 463
 464 int
 465 mouseaction(XEvent *e, uint release)
 466 {
 467         MouseShortcut *ms;
 468
 469         /* ignore Button<N>mask for Button<N> - it's set on release */
 470         uint state = e->xbutton.state & ~buttonmask(e->xbutton.button);
 471
 472         for (ms = mshortcuts; ms < mshortcuts + LEN(mshortcuts); ms++) {
 473                 if (ms->release == release &&
 474                     ms->button == e->xbutton.button &&
 475                     (match(ms->mod, state) ||  /* exact or forced */
 476                      match(ms->mod, state & ~forcemousemod))) {
 477                         ms->func(&(ms->arg));
 478                         return 1;
 479                 }
 480         }
 481
 482         return 0;
 483 }
 484
 485 void
 486 bpress(XEvent *e)
 487 {
 488         int btn = e->xbutton.button;
 489         struct timespec now;
 490         int snap;
 491
 492         if (1 <= btn && btn <= 11)
 493                 buttons |= 1 << (btn-1);
 494
 495         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forcemousemod)) {
 496                 mousereport(e);
 497                 return;
 498         }
 499
 500         if (mouseaction(e, 0))
 501                 return;
 502
 503         if (btn == Button1) {
 504                 /*
 505                  * If the user clicks below predefined timeouts specific
 506                  * snapping behaviour is exposed.
 507                  */
 508                 clock_gettime(CLOCK_MONOTONIC, &now);
 509                 if (TIMEDIFF(now, xsel.tclick2) <= tripleclicktimeout) {
 510                         snap = SNAP_LINE;
 511                 } else if (TIMEDIFF(now, xsel.tclick1) <= doubleclicktimeout) {
 512                         snap = SNAP_WORD;
 513                 } else {
 514                         snap = 0;
 515                 }
 516                 xsel.tclick2 = xsel.tclick1;
 517                 xsel.tclick1 = now;
 518
 519                 selstart(evcol(e), evrow(e), snap);
 520         }
 521 }
 522
 523 void
 524 propnotify(XEvent *e)
 525 {
 526         XPropertyEvent *xpev;
 527         Atom clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 528
 529         xpev = &e->xproperty;
 530         if (xpev->state == PropertyNewValue &&
 531                         (xpev->atom == XA_PRIMARY ||
 532                          xpev->atom == clipboard)) {
 533                 selnotify(e);
 534         }
 535 }
 536
 537 void
 538 selnotify(XEvent *e)
 539 {
 540         ulong nitems, ofs, rem;
 541         int format;
 542         uchar *data, *last, *repl;
 543         Atom type, incratom, property = None;
 544
 545         incratom = XInternAtom(xw.dpy, "INCR", 0);
 546
 547         ofs = 0;
 548         if (e->type == SelectionNotify)
 549                 property = e->xselection.property;
 550         else if (e->type == PropertyNotify)
 551                 property = e->xproperty.atom;
 552
 553         if (property == None)
 554                 return;
 555
 556         do {
 557                 if (XGetWindowProperty(xw.dpy, xw.win, property, ofs,
 558                                         BUFSIZ/4, False, AnyPropertyType,
 559                                         &type, &format, &nitems, &rem,
 560                                         &data)) {
 561                         fprintf(stderr, "Clipboard allocation failed\n");
 562                         return;
 563                 }
 564
 565                 if (e->type == PropertyNotify && nitems == 0 && rem == 0) {
 566                         /*
 567                          * If there is some PropertyNotify with no data, then
 568                          * this is the signal of the selection owner that all
 569                          * data has been transferred. We won't need to receive
 570                          * PropertyNotify events anymore.
 571                          */
 572                         MODBIT(xw.attrs.event_mask, 0, PropertyChangeMask);
 573                         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
 574                                         &xw.attrs);
 575                 }
 576
 577                 if (type == incratom) {
 578                         /*
 579                          * Activate the PropertyNotify events so we receive
 580                          * when the selection owner does send us the next
 581                          * chunk of data.
 582                          */
 583                         MODBIT(xw.attrs.event_mask, 1, PropertyChangeMask);
 584                         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
 585                                         &xw.attrs);
 586
 587                         /*
 588                          * Deleting the property is the transfer start signal.
 589                          */
 590                         XDeleteProperty(xw.dpy, xw.win, (int)property);
 591                         continue;
 592                 }
 593
 594                 /*
 595                  * As seen in getsel:
 596                  * Line endings are inconsistent in the terminal and GUI world
 597                  * copy and pasting. When receiving some selection data,
 598                  * replace all '\n' with '\r'.
 599                  * FIXME: Fix the computer world.
 600                  */
 601                 repl = data;
 602                 last = data + nitems * format / 8;
 603                 while ((repl = memchr(repl, '\n', last - repl))) {
 604                         *repl++ = '\r';
 605                 }
 606
 607                 if (IS_SET(MODE_BRCKTPASTE) && ofs == 0)
 608                         ttywrite("\033[200~", 6, 0);
 609                 ttywrite((char *)data, nitems * format / 8, 1);
 610                 if (IS_SET(MODE_BRCKTPASTE) && rem == 0)
 611                         ttywrite("\033[201~", 6, 0);
 612                 XFree(data);
 613                 /* number of 32-bit chunks returned */
 614                 ofs += nitems * format / 32;
 615         } while (rem > 0);
 616
 617         /*
 618          * Deleting the property again tells the selection owner to send the
 619          * next data chunk in the property.
 620          */
 621         XDeleteProperty(xw.dpy, xw.win, (int)property);
 622 }
 623
 624 void
 625 xclipcopy(void)
 626 {
 627         clipcopy(NULL);
 628 }
 629
 630 void
 631 selclear_(XEvent *e)
 632 {
 633         selclear();
 634 }
 635
 636 void
 637 selrequest(XEvent *e)
 638 {
 639         XSelectionRequestEvent *xsre;
 640         XSelectionEvent xev;
 641         Atom xa_targets, string, clipboard;
 642         char *seltext;
 643
 644         xsre = (XSelectionRequestEvent *) e;
 645         xev.type = SelectionNotify;
 646         xev.requestor = xsre->requestor;
 647         xev.selection = xsre->selection;
 648         xev.target = xsre->target;
 649         xev.time = xsre->time;
 650         if (xsre->property == None)
 651                 xsre->property = xsre->target;
 652
 653         /* reject */
 654         xev.property = None;
 655
 656         xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
 657         if (xsre->target == xa_targets) {
 658                 /* respond with the supported type */
 659                 string = xsel.xtarget;
 660                 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
 661                                 XA_ATOM, 32, PropModeReplace,
 662                                 (uchar *) &string, 1);
 663                 xev.property = xsre->property;
 664         } else if (xsre->target == xsel.xtarget || xsre->target == XA_STRING) {
 665                 /*
 666                  * xith XA_STRING non ascii characters may be incorrect in the
 667                  * requestor. It is not our problem, use utf8.
 668                  */
 669                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 670                 if (xsre->selection == XA_PRIMARY) {
 671                         seltext = xsel.primary;
 672                 } else if (xsre->selection == clipboard) {
 673                         seltext = xsel.clipboard;
 674                 } else {
 675                         fprintf(stderr,
 676                                 "Unhandled clipboard selection 0x%lx\n",
 677                                 xsre->selection);
 678                         return;
 679                 }
 680                 if (seltext != NULL) {
 681                         XChangeProperty(xsre->display, xsre->requestor,
 682                                         xsre->property, xsre->target,
 683                                         8, PropModeReplace,
 684                                         (uchar *)seltext, strlen(seltext));
 685                         xev.property = xsre->property;
 686                 }
 687         }
 688
 689         /* all done, send a notification to the listener */
 690         if (!XSendEvent(xsre->display, xsre->requestor, 1, 0, (XEvent *) &xev))
 691                 fprintf(stderr, "Error sending SelectionNotify event\n");
 692 }
 693
 694 void
 695 setsel(char *str, Time t)
 696 {
 697         if (!str)
 698                 return;
 699
 700         free(xsel.primary);
 701         xsel.primary = str;
 702
 703         XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
 704         if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
 705                 selclear();
 706 }
 707
 708 void
 709 xsetsel(char *str)
 710 {
 711         setsel(str, CurrentTime);
 712 }
 713
 714 void
 715 brelease(XEvent *e)
 716 {
 717         int btn = e->xbutton.button;
 718
 719         if (1 <= btn && btn <= 11)
 720                 buttons &= ~(1 << (btn-1));
 721
 722         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forcemousemod)) {
 723                 mousereport(e);
 724                 return;
 725         }
 726
 727         if (mouseaction(e, 1))
 728                 return;
 729         if (btn == Button1)
 730                 mousesel(e, 1);
 731 }
 732
 733 void
 734 bmotion(XEvent *e)
 735 {
 736         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forcemousemod)) {
 737                 mousereport(e);
 738                 return;
 739         }
 740
 741         mousesel(e, 0);
 742 }
 743
 744 void
 745 cresize(int width, int height)
 746 {
 747         int col, row;
 748
 749         if (width != 0)
 750                 win.w = width;
 751         if (height != 0)
 752                 win.h = height;
 753
 754         col = (win.w - 2 * borderpx) / win.cw;
 755         row = (win.h - 2 * borderpx) / win.ch;
 756         col = MAX(1, col);
 757         row = MAX(1, row);
 758
 759         win.hborderpx = (win.w - col * win.cw) / 2;
 760         win.vborderpx = (win.h - row * win.ch) / 2;
 761
 762         tresize(col, row);
 763         xresize(col, row);
 764         ttyresize(win.tw, win.th);
 765 }
 766
 767 void
 768 xresize(int col, int row)
 769 {
 770         win.tw = col * win.cw;
 771         win.th = row * win.ch;
 772
 773         XFreePixmap(xw.dpy, xw.buf);
 774         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
 775                         xw.depth);
 776         XftDrawChange(xw.draw, xw.buf);
 777         xclear(0, 0, win.w, win.h);
 778
 779         /* resize to new width */
 780         xw.specbuf = xrealloc(xw.specbuf, col * sizeof(GlyphFontSpec));
 781 }
 782
 783 ushort
 784 sixd_to_16bit(int x)
 785 {
 786         return x == 0 ? 0 : 0x3737 + 0x2828 * x;
 787 }
 788
 789 int
 790 xloadcolor(int i, const char *name, Color *ncolor)
 791 {
 792         XRenderColor color = { .alpha = 0xffff };
 793
 794         if (!name) {
 795                 if (BETWEEN(i, 16, 255)) { /* 256 color */
 796                         if (i < 6*6*6+16) { /* same colors as xterm */
 797                                 color.red   = sixd_to_16bit( ((i-16)/36)%6 );
 798                                 color.green = sixd_to_16bit( ((i-16)/6) %6 );
 799                                 color.blue  = sixd_to_16bit( ((i-16)/1) %6 );
 800                         } else { /* greyscale */
 801                                 color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
 802                                 color.green = color.blue = color.red;
 803                         }
 804                         return XftColorAllocValue(xw.dpy, xw.vis,
 805                                                   xw.cmap, &color, ncolor);
 806                 } else
 807                         name = colorname[i];
 808         }
 809
 810         return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
 811 }
 812
 813 void
 814 xloadcols(void)
 815 {
 816         int i;
 817         static int loaded;
 818         Color *cp;
 819
 820         if (loaded) {
 821                 for (cp = dc.col; cp < &dc.col[dc.collen]; ++cp)
 822                         XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
 823         } else {
 824                 dc.collen = MAX(LEN(colorname), 256);
 825                 dc.col = xmalloc(dc.collen * sizeof(Color));
 826         }
 827
 828         for (i = 0; i < dc.collen; i++)
 829                 if (!xloadcolor(i, NULL, &dc.col[i])) {
 830                         if (colorname[i])
 831                                 die("could not allocate color '%s'\n", colorname[i]);
 832                         else
 833                                 die("could not allocate color %d\n", i);
 834                 }
 835
 836         /* set alpha value of bg color */
 837         if (opt_alpha)
 838                 alpha = strtof(opt_alpha, NULL);
 839         dc.col[defaultbg].color.alpha = (unsigned short)(0xffff * alpha);
 840         dc.col[defaultbg].pixel &= 0x00FFFFFF;
 841         dc.col[defaultbg].pixel |= (unsigned char)(0xff * alpha) << 24;
 842         loaded = 1;
 843 }
 844
 845 int
 846 xgetcolor(int x, unsigned char *r, unsigned char *g, unsigned char *b)
 847 {
 848         if (!BETWEEN(x, 0, dc.collen))
 849                 return 1;
 850
 851         *r = dc.col[x].color.red >> 8;
 852         *g = dc.col[x].color.green >> 8;
 853         *b = dc.col[x].color.blue >> 8;
 854
 855         return 0;
 856 }
 857
 858 int
 859 xsetcolorname(int x, const char *name)
 860 {
 861         Color ncolor;
 862
 863         if (!BETWEEN(x, 0, dc.collen))
 864                 return 1;
 865
 866         if (!xloadcolor(x, name, &ncolor))
 867                 return 1;
 868
 869         XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
 870         dc.col[x] = ncolor;
 871
 872         return 0;
 873 }
 874
 875 /*
 876  * Absolute coordinates.
 877  */
 878 void
 879 xclear(int x1, int y1, int x2, int y2)
 880 {
 881         XftDrawRect(xw.draw,
 882                         &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
 883                         x1, y1, x2-x1, y2-y1);
 884 }
 885
 886 void
 887 xhints(void)
 888 {
 889         XClassHint class = {opt_name ? opt_name : "st",
 890                             opt_class ? opt_class : "St"};
 891         XWMHints wm = {.flags = InputHint, .input = 1};
 892         XSizeHints *sizeh;
 893
 894         sizeh = XAllocSizeHints();
 895
 896         sizeh->flags = PSize | PResizeInc | PBaseSize | PMinSize;
 897         sizeh->height = win.h;
 898         sizeh->width = win.w;
 899         sizeh->height_inc = 1;
 900         sizeh->width_inc = 1;
 901         sizeh->base_height = 2 * borderpx;
 902         sizeh->base_width = 2 * borderpx;
 903         sizeh->min_height = win.ch + 2 * borderpx;
 904         sizeh->min_width = win.cw + 2 * borderpx;
 905         if (xw.isfixed) {
 906                 sizeh->flags |= PMaxSize;
 907                 sizeh->min_width = sizeh->max_width = win.w;
 908                 sizeh->min_height = sizeh->max_height = win.h;
 909         }
 910         if (xw.gm & (XValue|YValue)) {
 911                 sizeh->flags |= USPosition | PWinGravity;
 912                 sizeh->x = xw.l;
 913                 sizeh->y = xw.t;
 914                 sizeh->win_gravity = xgeommasktogravity(xw.gm);
 915         }
 916
 917         XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
 918                         &class);
 919         XFree(sizeh);
 920 }
 921
 922 int
 923 xgeommasktogravity(int mask)
 924 {
 925         switch (mask & (XNegative|YNegative)) {
 926         case 0:
 927                 return NorthWestGravity;
 928         case XNegative:
 929                 return NorthEastGravity;
 930         case YNegative:
 931                 return SouthWestGravity;
 932         }
 933
 934         return SouthEastGravity;
 935 }
 936
 937 int
 938 xloadfont(Font *f, FcPattern *pattern)
 939 {
 940         FcPattern *configured;
 941         FcPattern *match;
 942         FcResult result;
 943         XGlyphInfo extents;
 944         int wantattr, haveattr;
 945
 946         /*
 947          * Manually configure instead of calling XftMatchFont
 948          * so that we can use the configured pattern for
 949          * "missing glyph" lookups.
 950          */
 951         configured = FcPatternDuplicate(pattern);
 952         if (!configured)
 953                 return 1;
 954
 955         FcConfigSubstitute(NULL, configured, FcMatchPattern);
 956         XftDefaultSubstitute(xw.dpy, xw.scr, configured);
 957
 958         match = FcFontMatch(NULL, configured, &result);
 959         if (!match) {
 960                 FcPatternDestroy(configured);
 961                 return 1;
 962         }
 963
 964         if (!(f->match = XftFontOpenPattern(xw.dpy, match))) {
 965                 FcPatternDestroy(configured);
 966                 FcPatternDestroy(match);
 967                 return 1;
 968         }
 969
 970         if ((XftPatternGetInteger(pattern, "slant", 0, &wantattr) ==
 971             XftResultMatch)) {
 972                 /*
 973                  * Check if xft was unable to find a font with the appropriate
 974                  * slant but gave us one anyway. Try to mitigate.
 975                  */
 976                 if ((XftPatternGetInteger(f->match->pattern, "slant", 0,
 977                     &haveattr) != XftResultMatch) || haveattr < wantattr) {
 978                         f->badslant = 1;
 979                         fputs("font slant does not match\n", stderr);
 980                 }
 981         }
 982
 983         if ((XftPatternGetInteger(pattern, "weight", 0, &wantattr) ==
 984             XftResultMatch)) {
 985                 if ((XftPatternGetInteger(f->match->pattern, "weight", 0,
 986                     &haveattr) != XftResultMatch) || haveattr != wantattr) {
 987                         f->badweight = 1;
 988                         fputs("font weight does not match\n", stderr);
 989                 }
 990         }
 991
 992         XftTextExtentsUtf8(xw.dpy, f->match,
 993                 (const FcChar8 *) ascii_printable,
 994                 strlen(ascii_printable), &extents);
 995
 996         f->set = NULL;
 997         f->pattern = configured;
 998
 999         f->ascent = f->match->ascent;
1000         f->descent = f->match->descent;
1001         f->lbearing = 0;
1002         f->rbearing = f->match->max_advance_width;
1003
1004         f->height = f->ascent + f->descent;
1005         f->width = DIVCEIL(extents.xOff, strlen(ascii_printable));
1006
1007         return 0;
1008 }
1009
1010 void
1011 xloadfonts(const char *fontstr, double fontsize)
1012 {
1013         FcPattern *pattern;
1014         double fontval;
1015
1016         if (fontstr[0] == '-')
1017                 pattern = XftXlfdParse(fontstr, False, False);
1018         else
1019                 pattern = FcNameParse((const FcChar8 *)fontstr);
1020
1021         if (!pattern)
1022                 die("can't open font %s\n", fontstr);
1023
1024         if (fontsize > 1) {
1025                 FcPatternDel(pattern, FC_PIXEL_SIZE);
1026                 FcPatternDel(pattern, FC_SIZE);
1027                 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
1028                 usedfontsize = fontsize;
1029         } else {
1030                 if (FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval) ==
1031                                 FcResultMatch) {
1032                         usedfontsize = fontval;
1033                 } else if (FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval) ==
1034                                 FcResultMatch) {
1035                         usedfontsize = -1;
1036                 } else {
1037                         /*
1038                          * Default font size is 12, if none given. This is to
1039                          * have a known usedfontsize value.
1040                          */
1041                         FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
1042                         usedfontsize = 12;
1043                 }
1044                 defaultfontsize = usedfontsize;
1045         }
1046
1047         if (xloadfont(&dc.font, pattern))
1048                 die("can't open font %s\n", fontstr);
1049
1050         if (usedfontsize < 0) {
1051                 FcPatternGetDouble(dc.font.match->pattern,
1052                                    FC_PIXEL_SIZE, 0, &fontval);
1053                 usedfontsize = fontval;
1054                 if (fontsize == 0)
1055                         defaultfontsize = fontval;
1056         }
1057
1058         /* Setting character width and height. */
1059         win.cw = ceilf(dc.font.width * cwscale);
1060         win.ch = ceilf(dc.font.height * chscale);
1061
1062         FcPatternDel(pattern, FC_SLANT);
1063         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
1064         if (xloadfont(&dc.ifont, pattern))
1065                 die("can't open font %s\n", fontstr);
1066
1067         FcPatternDel(pattern, FC_WEIGHT);
1068         FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
1069         if (xloadfont(&dc.ibfont, pattern))
1070                 die("can't open font %s\n", fontstr);
1071
1072         FcPatternDel(pattern, FC_SLANT);
1073         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
1074         if (xloadfont(&dc.bfont, pattern))
1075                 die("can't open font %s\n", fontstr);
1076
1077         FcPatternDestroy(pattern);
1078 }
1079
1080 void
1081 xunloadfont(Font *f)
1082 {
1083         XftFontClose(xw.dpy, f->match);
1084         FcPatternDestroy(f->pattern);
1085         if (f->set)
1086                 FcFontSetDestroy(f->set);
1087 }
1088
1089 void
1090 xunloadfonts(void)
1091 {
1092         /* Free the loaded fonts in the font cache.  */
1093         while (frclen > 0)
1094                 XftFontClose(xw.dpy, frc[--frclen].font);
1095
1096         xunloadfont(&dc.font);
1097         xunloadfont(&dc.bfont);
1098         xunloadfont(&dc.ifont);
1099         xunloadfont(&dc.ibfont);
1100 }
1101
1102 int
1103 ximopen(Display *dpy)
1104 {
1105         XIMCallback imdestroy = { .client_data = NULL, .callback = ximdestroy };
1106         XICCallback icdestroy = { .client_data = NULL, .callback = xicdestroy };
1107
1108         xw.ime.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
1109         if (xw.ime.xim == NULL)
1110                 return 0;
1111
1112         if (XSetIMValues(xw.ime.xim, XNDestroyCallback, &imdestroy, NULL))
1113                 fprintf(stderr, "XSetIMValues: "
1114                                 "Could not set XNDestroyCallback.\n");
1115
1116         xw.ime.spotlist = XVaCreateNestedList(0, XNSpotLocation, &xw.ime.spot,
1117                                               NULL);
1118
1119         if (xw.ime.xic == NULL) {
1120                 xw.ime.xic = XCreateIC(xw.ime.xim, XNInputStyle,
1121                                        XIMPreeditNothing | XIMStatusNothing,
1122                                        XNClientWindow, xw.win,
1123                                        XNDestroyCallback, &icdestroy,
1124                                        NULL);
1125         }
1126         if (xw.ime.xic == NULL)
1127                 fprintf(stderr, "XCreateIC: Could not create input context.\n");
1128
1129         return 1;
1130 }
1131
1132 void
1133 ximinstantiate(Display *dpy, XPointer client, XPointer call)
1134 {
1135         if (ximopen(dpy))
1136                 XUnregisterIMInstantiateCallback(xw.dpy, NULL, NULL, NULL,
1137                                                  ximinstantiate, NULL);
1138 }
1139
1140 void
1141 ximdestroy(XIM xim, XPointer client, XPointer call)
1142 {
1143         xw.ime.xim = NULL;
1144         XRegisterIMInstantiateCallback(xw.dpy, NULL, NULL, NULL,
1145                                        ximinstantiate, NULL);
1146         XFree(xw.ime.spotlist);
1147 }
1148
1149 int
1150 xicdestroy(XIC xim, XPointer client, XPointer call)
1151 {
1152         xw.ime.xic = NULL;
1153         return 1;
1154 }
1155
1156 void
1157 xinit(int cols, int rows)
1158 {
1159         XGCValues gcvalues;
1160         Cursor cursor;
1161         Window parent;
1162         pid_t thispid = getpid();
1163         XColor xmousefg, xmousebg;
1164         XWindowAttributes attr;
1165         XVisualInfo vis;
1166
1167         xw.scr = XDefaultScreen(xw.dpy);
1168
1169         if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0)))) {
1170                 parent = XRootWindow(xw.dpy, xw.scr);
1171                 xw.depth = 32;
1172         } else {
1173                 XGetWindowAttributes(xw.dpy, parent, &attr);
1174                 xw.depth = attr.depth;
1175         }
1176
1177         XMatchVisualInfo(xw.dpy, xw.scr, xw.depth, TrueColor, &vis);
1178         xw.vis = vis.visual;
1179
1180         /* font */
1181         if (!FcInit())
1182                 die("could not init fontconfig.\n");
1183
1184         usedfont = (opt_font == NULL)? font : opt_font;
1185         xloadfonts(usedfont, 0);
1186
1187         /* colors */
1188         xw.cmap = XCreateColormap(xw.dpy, parent, xw.vis, None);
1189         xloadcols();
1190
1191         /* adjust fixed window geometry */
1192         win.w = 2 * win.hborderpx + 2 * borderpx + cols * win.cw;
1193         win.h = 2 * win.vborderpx + 2 * borderpx + rows * win.ch;
1194         if (xw.gm & XNegative)
1195                 xw.l += DisplayWidth(xw.dpy, xw.scr) - win.w - 2;
1196         if (xw.gm & YNegative)
1197                 xw.t += DisplayHeight(xw.dpy, xw.scr) - win.h - 2;
1198
1199         /* Events */
1200         xw.attrs.background_pixel = dc.col[defaultbg].pixel;
1201         xw.attrs.border_pixel = dc.col[defaultbg].pixel;
1202         xw.attrs.bit_gravity = NorthWestGravity;
1203         xw.attrs.event_mask = FocusChangeMask | KeyPressMask | KeyReleaseMask
1204                 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1205                 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
1206         xw.attrs.colormap = xw.cmap;
1207
1208         xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
1209                         win.w, win.h, 0, xw.depth, InputOutput,
1210                         xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
1211                         | CWEventMask | CWColormap, &xw.attrs);
1212
1213         memset(&gcvalues, 0, sizeof(gcvalues));
1214         gcvalues.graphics_exposures = False;
1215         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h, xw.depth);
1216         dc.gc = XCreateGC(xw.dpy, xw.buf, GCGraphicsExposures, &gcvalues);
1217         XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
1218         XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, win.w, win.h);
1219
1220         /* font spec buffer */
1221         xw.specbuf = xmalloc(cols * sizeof(GlyphFontSpec));
1222
1223         /* Xft rendering context */
1224         xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
1225
1226         /* input methods */
1227         if (!ximopen(xw.dpy)) {
1228                 XRegisterIMInstantiateCallback(xw.dpy, NULL, NULL, NULL,
1229                                                ximinstantiate, NULL);
1230         }
1231
1232         /* white cursor, black outline */
1233         cursor = XCreateFontCursor(xw.dpy, mouseshape);
1234         XDefineCursor(xw.dpy, xw.win, cursor);
1235
1236         if (XParseColor(xw.dpy, xw.cmap, colorname[mousefg], &xmousefg) == 0) {
1237                 xmousefg.red   = 0xffff;
1238                 xmousefg.green = 0xffff;
1239                 xmousefg.blue  = 0xffff;
1240         }
1241
1242         if (XParseColor(xw.dpy, xw.cmap, colorname[mousebg], &xmousebg) == 0) {
1243                 xmousebg.red   = 0x0000;
1244                 xmousebg.green = 0x0000;
1245                 xmousebg.blue  = 0x0000;
1246         }
1247
1248         XRecolorCursor(xw.dpy, cursor, &xmousefg, &xmousebg);
1249
1250         xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
1251         xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
1252         xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
1253         xw.netwmiconname = XInternAtom(xw.dpy, "_NET_WM_ICON_NAME", False);
1254         XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
1255
1256         xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
1257         XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
1258                         PropModeReplace, (uchar *)&thispid, 1);
1259
1260         win.mode = MODE_NUMLOCK;
1261         resettitle();
1262         xhints();
1263         XMapWindow(xw.dpy, xw.win);
1264         XSync(xw.dpy, False);
1265
1266         clock_gettime(CLOCK_MONOTONIC, &xsel.tclick1);
1267         clock_gettime(CLOCK_MONOTONIC, &xsel.tclick2);
1268         xsel.primary = NULL;
1269         xsel.clipboard = NULL;
1270         xsel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
1271         if (xsel.xtarget == None)
1272                 xsel.xtarget = XA_STRING;
1273 }
1274
1275 int
1276 xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x, int y)
1277 {
1278         float winx = win.hborderpx + x * win.cw, winy = win.vborderpx + y * win.ch, xp, yp;
1279         ushort mode, prevmode = USHRT_MAX;
1280         Font *font = &dc.font;
1281         int frcflags = FRC_NORMAL;
1282         float runewidth = win.cw;
1283         Rune rune;
1284         FT_UInt glyphidx;
1285         FcResult fcres;
1286         FcPattern *fcpattern, *fontpattern;
1287         FcFontSet *fcsets[] = { NULL };
1288         FcCharSet *fccharset;
1289         int i, f, numspecs = 0;
1290
1291         for (i = 0, xp = winx, yp = winy + font->ascent; i < len; ++i) {
1292                 /* Fetch rune and mode for current glyph. */
1293                 rune = glyphs[i].u;
1294                 mode = glyphs[i].mode;
1295
1296                 /* Skip dummy wide-character spacing. */
1297                 if (mode == ATTR_WDUMMY)
1298                         continue;
1299
1300                 /* Determine font for glyph if different from previous glyph. */
1301                 if (prevmode != mode) {
1302                         prevmode = mode;
1303                         font = &dc.font;
1304                         frcflags = FRC_NORMAL;
1305                         runewidth = win.cw * ((mode & ATTR_WIDE) ? 2.0f : 1.0f);
1306                         if ((mode & ATTR_ITALIC) && (mode & ATTR_BOLD)) {
1307                                 font = &dc.ibfont;
1308                                 frcflags = FRC_ITALICBOLD;
1309                         } else if (mode & ATTR_ITALIC) {
1310                                 font = &dc.ifont;
1311                                 frcflags = FRC_ITALIC;
1312                         } else if (mode & ATTR_BOLD) {
1313                                 font = &dc.bfont;
1314                                 frcflags = FRC_BOLD;
1315                         }
1316                         yp = winy + font->ascent;
1317                 }
1318
1319                 /* Lookup character index with default font. */
1320                 glyphidx = XftCharIndex(xw.dpy, font->match, rune);
1321                 if (glyphidx) {
1322                         specs[numspecs].font = font->match;
1323                         specs[numspecs].glyph = glyphidx;
1324                         specs[numspecs].x = (short)xp;
1325                         specs[numspecs].y = (short)yp;
1326                         xp += runewidth;
1327                         numspecs++;
1328                         continue;
1329                 }
1330
1331                 /* Fallback on font cache, search the font cache for match. */
1332                 for (f = 0; f < frclen; f++) {
1333                         glyphidx = XftCharIndex(xw.dpy, frc[f].font, rune);
1334                         /* Everything correct. */
1335                         if (glyphidx && frc[f].flags == frcflags)
1336                                 break;
1337                         /* We got a default font for a not found glyph. */
1338                         if (!glyphidx && frc[f].flags == frcflags
1339                                         && frc[f].unicodep == rune) {
1340                                 break;
1341                         }
1342                 }
1343
1344                 /* Nothing was found. Use fontconfig to find matching font. */
1345                 if (f >= frclen) {
1346                         if (!font->set)
1347                                 font->set = FcFontSort(0, font->pattern,
1348                                                        1, 0, &fcres);
1349                         fcsets[0] = font->set;
1350
1351                         /*
1352                          * Nothing was found in the cache. Now use
1353                          * some dozen of Fontconfig calls to get the
1354                          * font for one single character.
1355                          *
1356                          * Xft and fontconfig are design failures.
1357                          */
1358                         fcpattern = FcPatternDuplicate(font->pattern);
1359                         fccharset = FcCharSetCreate();
1360
1361                         FcCharSetAddChar(fccharset, rune);
1362                         FcPatternAddCharSet(fcpattern, FC_CHARSET,
1363                                         fccharset);
1364                         FcPatternAddBool(fcpattern, FC_SCALABLE, 1);
1365
1366                         FcConfigSubstitute(0, fcpattern,
1367                                         FcMatchPattern);
1368                         FcDefaultSubstitute(fcpattern);
1369
1370                         fontpattern = FcFontSetMatch(0, fcsets, 1,
1371                                         fcpattern, &fcres);
1372
1373                         /* Allocate memory for the new cache entry. */
1374                         if (frclen >= frccap) {
1375                                 frccap += 16;
1376                                 frc = xrealloc(frc, frccap * sizeof(Fontcache));
1377                         }
1378
1379                         frc[frclen].font = XftFontOpenPattern(xw.dpy,
1380                                         fontpattern);
1381                         if (!frc[frclen].font)
1382                                 die("XftFontOpenPattern failed seeking fallback font: %s\n",
1383                                         strerror(errno));
1384                         frc[frclen].flags = frcflags;
1385                         frc[frclen].unicodep = rune;
1386
1387                         glyphidx = XftCharIndex(xw.dpy, frc[frclen].font, rune);
1388
1389                         f = frclen;
1390                         frclen++;
1391
1392                         FcPatternDestroy(fcpattern);
1393                         FcCharSetDestroy(fccharset);
1394                 }
1395
1396                 specs[numspecs].font = frc[f].font;
1397                 specs[numspecs].glyph = glyphidx;
1398                 specs[numspecs].x = (short)xp;
1399                 specs[numspecs].y = (short)yp;
1400                 xp += runewidth;
1401                 numspecs++;
1402         }
1403
1404         return numspecs;
1405 }
1406
1407 void
1408 xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, int y)
1409 {
1410         int charlen = len * ((base.mode & ATTR_WIDE) ? 2 : 1);
1411         int winx = win.hborderpx + x * win.cw, winy = win.vborderpx + y * win.ch,
1412             width = charlen * win.cw;
1413         Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
1414         XRenderColor colfg, colbg;
1415         XRectangle r;
1416
1417         /* Fallback on color display for attributes not supported by the font */
1418         if (base.mode & ATTR_ITALIC && base.mode & ATTR_BOLD) {
1419                 if (dc.ibfont.badslant || dc.ibfont.badweight)
1420                         base.fg = defaultattr;
1421         } else if ((base.mode & ATTR_ITALIC && dc.ifont.badslant) ||
1422             (base.mode & ATTR_BOLD && dc.bfont.badweight)) {
1423                 base.fg = defaultattr;
1424         }
1425
1426         if (IS_TRUECOL(base.fg)) {
1427                 colfg.alpha = 0xffff;
1428                 colfg.red = TRUERED(base.fg);
1429                 colfg.green = TRUEGREEN(base.fg);
1430                 colfg.blue = TRUEBLUE(base.fg);
1431                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
1432                 fg = &truefg;
1433         } else {
1434                 fg = &dc.col[base.fg];
1435         }
1436
1437         if (IS_TRUECOL(base.bg)) {
1438                 colbg.alpha = 0xffff;
1439                 colbg.green = TRUEGREEN(base.bg);
1440                 colbg.red = TRUERED(base.bg);
1441                 colbg.blue = TRUEBLUE(base.bg);
1442                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
1443                 bg = &truebg;
1444         } else {
1445                 bg = &dc.col[base.bg];
1446         }
1447
1448         /* Change basic system colors [0-7] to bright system colors [8-15] */
1449         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_BOLD && BETWEEN(base.fg, 0, 7))
1450                 fg = &dc.col[base.fg + 8];
1451
1452         if (IS_SET(MODE_REVERSE)) {
1453                 if (fg == &dc.col[defaultfg]) {
1454                         fg = &dc.col[defaultbg];
1455                 } else {
1456                         colfg.red = ~fg->color.red;
1457                         colfg.green = ~fg->color.green;
1458                         colfg.blue = ~fg->color.blue;
1459                         colfg.alpha = fg->color.alpha;
1460                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
1461                                         &revfg);
1462                         fg = &revfg;
1463                 }
1464
1465                 if (bg == &dc.col[defaultbg]) {
1466                         bg = &dc.col[defaultfg];
1467                 } else {
1468                         colbg.red = ~bg->color.red;
1469                         colbg.green = ~bg->color.green;
1470                         colbg.blue = ~bg->color.blue;
1471                         colbg.alpha = bg->color.alpha;
1472                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
1473                                         &revbg);
1474                         bg = &revbg;
1475                 }
1476         }
1477
1478         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_FAINT) {
1479                 colfg.red = fg->color.red / 2;
1480                 colfg.green = fg->color.green / 2;
1481                 colfg.blue = fg->color.blue / 2;
1482                 colfg.alpha = fg->color.alpha;
1483                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
1484                 fg = &revfg;
1485         }
1486
1487         if (base.mode & ATTR_REVERSE) {
1488                 temp = fg;
1489                 fg = bg;
1490                 bg = temp;
1491         }
1492
1493         if (base.mode & ATTR_BLINK && win.mode & MODE_BLINK)
1494                 fg = bg;
1495
1496         if (base.mode & ATTR_INVISIBLE)
1497                 fg = bg;
1498
1499         /* Intelligent cleaning up of the borders. */
1500         if (x == 0) {
1501                 xclear(0, (y == 0)? 0 : winy, win.vborderpx,
1502                         winy + win.ch +
1503                         ((winy + win.ch >= win.vborderpx + win.th)? win.h : 0));
1504         }
1505         if (winx + width >= win.hborderpx + win.tw) {
1506                 xclear(winx + width, (y == 0)? 0 : winy, win.w,
1507                         ((winy + win.ch >= win.vborderpx + win.th)? win.h : (winy + win.ch)));
1508         }
1509         if (y == 0)
1510                 xclear(winx, 0, winx + width, win.vborderpx);
1511         if (winy + win.ch >= win.vborderpx + win.th)
1512                 xclear(winx, winy + win.ch, winx + width, win.h);
1513
1514         /* Clean up the region we want to draw to. */
1515         XftDrawRect(xw.draw, bg, winx, winy, width, win.ch);
1516
1517         /* Set the clip region because Xft is sometimes dirty. */
1518         r.x = 0;
1519         r.y = 0;
1520         r.height = win.ch;
1521         r.width = width;
1522         XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
1523
1524         /* Render the glyphs. */
1525         XftDrawGlyphFontSpec(xw.draw, fg, specs, len);
1526
1527         /* Render underline and strikethrough. */
1528         if (base.mode & ATTR_UNDERLINE) {
1529                 XftDrawRect(xw.draw, fg, winx, winy + dc.font.ascent * chscale + 1,
1530                                 width, 1);
1531         }
1532
1533         if (base.mode & ATTR_STRUCK) {
1534                 XftDrawRect(xw.draw, fg, winx, winy + 2 * dc.font.ascent * chscale / 3,
1535                                 width, 1);
1536         }
1537
1538         /* Reset clip to none. */
1539         XftDrawSetClip(xw.draw, 0);
1540 }
1541
1542 void
1543 xdrawglyph(Glyph g, int x, int y)
1544 {
1545         int numspecs;
1546         XftGlyphFontSpec spec;
1547
1548         numspecs = xmakeglyphfontspecs(&spec, &g, 1, x, y);
1549         xdrawglyphfontspecs(&spec, g, numspecs, x, y);
1550 }
1551
1552 void
1553 xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og)
1554 {
1555         Color drawcol;
1556
1557         /* remove the old cursor */
1558         if (selected(ox, oy))
1559                 og.mode ^= ATTR_REVERSE;
1560         xdrawglyph(og, ox, oy);
1561
1562         if (IS_SET(MODE_HIDE))
1563                 return;
1564
1565         /*
1566          * Select the right color for the right mode.
1567          */
1568         g.mode &= ATTR_BOLD|ATTR_ITALIC|ATTR_UNDERLINE|ATTR_STRUCK|ATTR_WIDE;
1569
1570         if (IS_SET(MODE_REVERSE)) {
1571                 g.mode |= ATTR_REVERSE;
1572                 g.bg = defaultfg;
1573                 if (selected(cx, cy)) {
1574                         drawcol = dc.col[defaultcs];
1575                         g.fg = defaultrcs;
1576                 } else {
1577                         drawcol = dc.col[defaultrcs];
1578                         g.fg = defaultcs;
1579                 }
1580         } else {
1581                 if (selected(cx, cy)) {
1582                         g.fg = defaultfg;
1583                         g.bg = defaultrcs;
1584                 } else {
1585                         g.fg = defaultbg;
1586                         g.bg = defaultcs;
1587                 }
1588                 drawcol = dc.col[g.bg];
1589         }
1590
1591         /* draw the new one */
1592         if (IS_SET(MODE_FOCUSED)) {
1593                 switch (win.cursor) {
1594                 case 7: /* st extension */
1595                         g.u = 0x2603; /* snowman (U+2603) */
1596                         /* FALLTHROUGH */
1597                 case 0: /* Blinking Block */
1598                 case 1: /* Blinking Block (Default) */
1599                 case 2: /* Steady Block */
1600                         xdrawglyph(g, cx, cy);
1601                         break;
1602                 case 3: /* Blinking Underline */
1603                 case 4: /* Steady Underline */
1604                         XftDrawRect(xw.draw, &drawcol,
1605                                         win.hborderpx + cx * win.cw,
1606                                         win.vborderpx + (cy + 1) * win.ch - \
1607                                                 cursorthickness,
1608                                         win.cw, cursorthickness);
1609                         break;
1610                 case 5: /* Blinking bar */
1611                 case 6: /* Steady bar */
1612                         XftDrawRect(xw.draw, &drawcol,
1613                                         win.hborderpx + cx * win.cw,
1614                                         win.vborderpx + cy * win.ch,
1615                                         cursorthickness, win.ch);
1616                         break;
1617                 }
1618         } else {
1619                 XftDrawRect(xw.draw, &drawcol,
1620                                 win.hborderpx + cx * win.cw,
1621                                 win.vborderpx + cy * win.ch,
1622                                 win.cw - 1, 1);
1623                 XftDrawRect(xw.draw, &drawcol,
1624                                 win.hborderpx + cx * win.cw,
1625                                 win.vborderpx + cy * win.ch,
1626                                 1, win.ch - 1);
1627                 XftDrawRect(xw.draw, &drawcol,
1628                                 win.hborderpx + (cx + 1) * win.cw - 1,
1629                                 win.vborderpx + cy * win.ch,
1630                                 1, win.ch - 1);
1631                 XftDrawRect(xw.draw, &drawcol,
1632                                 win.hborderpx + cx * win.cw,
1633                                 win.vborderpx + (cy + 1) * win.ch - 1,
1634                                 win.cw, 1);
1635         }
1636 }
1637
1638 void
1639 xsetenv(void)
1640 {
1641         char buf[sizeof(long) * 8 + 1];
1642
1643         snprintf(buf, sizeof(buf), "%lu", xw.win);
1644         setenv("WINDOWID", buf, 1);
1645 }
1646
1647 void
1648 xseticontitle(char *p)
1649 {
1650         XTextProperty prop;
1651         DEFAULT(p, opt_title);
1652
1653         if (Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
1654                                         &prop) != Success)
1655                 return;
1656         XSetWMIconName(xw.dpy, xw.win, &prop);
1657         XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmiconname);
1658         XFree(prop.value);
1659 }
1660
1661 void
1662 xsettitle(char *p)
1663 {
1664         XTextProperty prop;
1665         DEFAULT(p, opt_title);
1666
1667         if (Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
1668                                         &prop) != Success)
1669                 return;
1670         XSetWMName(xw.dpy, xw.win, &prop);
1671         XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
1672         XFree(prop.value);
1673 }
1674
1675 int
1676 xstartdraw(void)
1677 {
1678         return IS_SET(MODE_VISIBLE);
1679 }
1680
1681 void
1682 xdrawline(Line line, int x1, int y1, int x2)
1683 {
1684         int i, x, ox, numspecs;
1685         Glyph base, new;
1686         XftGlyphFontSpec *specs = xw.specbuf;
1687
1688         numspecs = xmakeglyphfontspecs(specs, &line[x1], x2 - x1, x1, y1);
1689         i = ox = 0;
1690         for (x = x1; x < x2 && i < numspecs; x++) {
1691                 new = line[x];
1692                 if (new.mode == ATTR_WDUMMY)
1693                         continue;
1694                 if (selected(x, y1))
1695                         new.mode ^= ATTR_REVERSE;
1696                 if (i > 0 && ATTRCMP(base, new)) {
1697                         xdrawglyphfontspecs(specs, base, i, ox, y1);
1698                         specs += i;
1699                         numspecs -= i;
1700                         i = 0;
1701                 }
1702                 if (i == 0) {
1703                         ox = x;
1704                         base = new;
1705                 }
1706                 i++;
1707         }
1708         if (i > 0)
1709                 xdrawglyphfontspecs(specs, base, i, ox, y1);
1710 }
1711
1712 void
1713 xfinishdraw(void)
1714 {
1715         XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, win.w,
1716                         win.h, 0, 0);
1717         XSetForeground(xw.dpy, dc.gc,
1718                         dc.col[IS_SET(MODE_REVERSE)?
1719                                 defaultfg : defaultbg].pixel);
1720 }
1721
1722 void
1723 xximspot(int x, int y)
1724 {
1725         if (xw.ime.xic == NULL)
1726                 return;
1727
1728         xw.ime.spot.x = borderpx + x * win.cw;
1729         xw.ime.spot.y = borderpx + (y + 1) * win.ch;
1730
1731         XSetICValues(xw.ime.xic, XNPreeditAttributes, xw.ime.spotlist, NULL);
1732 }
1733
1734 void
1735 expose(XEvent *ev)
1736 {
1737         redraw();
1738 }
1739
1740 void
1741 visibility(XEvent *ev)
1742 {
1743         XVisibilityEvent *e = &ev->xvisibility;
1744
1745         MODBIT(win.mode, e->state != VisibilityFullyObscured, MODE_VISIBLE);
1746 }
1747
1748 void
1749 unmap(XEvent *ev)
1750 {
1751         win.mode &= ~MODE_VISIBLE;
1752 }
1753
1754 void
1755 xsetpointermotion(int set)
1756 {
1757         MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
1758         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
1759 }
1760
1761 void
1762 xsetmode(int set, unsigned int flags)
1763 {
1764         int mode = win.mode;
1765         MODBIT(win.mode, set, flags);
1766         if ((win.mode & MODE_REVERSE) != (mode & MODE_REVERSE))
1767                 redraw();
1768 }
1769
1770 int
1771 xsetcursor(int cursor)
1772 {
1773         if (!BETWEEN(cursor, 0, 7)) /* 7: st extension */
1774                 return 1;
1775         win.cursor = cursor;
1776         return 0;
1777 }
1778
1779 void
1780 xseturgency(int add)
1781 {
1782         XWMHints *h = XGetWMHints(xw.dpy, xw.win);
1783
1784         MODBIT(h->flags, add, XUrgencyHint);
1785         XSetWMHints(xw.dpy, xw.win, h);
1786         XFree(h);
1787 }
1788
1789 void
1790 xbell(void)
1791 {
1792         if (!(IS_SET(MODE_FOCUSED)))
1793                 xseturgency(1);
1794         if (bellvolume)
1795                 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
1796 }
1797
1798 void
1799 focus(XEvent *ev)
1800 {
1801         XFocusChangeEvent *e = &ev->xfocus;
1802
1803         if (e->mode == NotifyGrab)
1804                 return;
1805
1806         if (ev->type == FocusIn) {
1807                 if (xw.ime.xic)
1808                         XSetICFocus(xw.ime.xic);
1809                 win.mode |= MODE_FOCUSED;
1810                 xseturgency(0);
1811                 if (IS_SET(MODE_FOCUS))
1812                         ttywrite("\033[I", 3, 0);
1813         } else {
1814                 if (xw.ime.xic)
1815                         XUnsetICFocus(xw.ime.xic);
1816                 win.mode &= ~MODE_FOCUSED;
1817                 if (IS_SET(MODE_FOCUS))
1818                         ttywrite("\033[O", 3, 0);
1819         }
1820 }
1821
1822 int
1823 match(uint mask, uint state)
1824 {
1825         return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
1826 }
1827
1828 char*
1829 kmap(KeySym k, uint state)
1830 {
1831         Key *kp;
1832         int i;
1833
1834         /* Check for mapped keys out of X11 function keys. */
1835         for (i = 0; i < LEN(mappedkeys); i++) {
1836                 if (mappedkeys[i] == k)
1837                         break;
1838         }
1839         if (i == LEN(mappedkeys)) {
1840                 if ((k & 0xFFFF) < 0xFD00)
1841                         return NULL;
1842         }
1843
1844         for (kp = key; kp < key + LEN(key); kp++) {
1845                 if (kp->k != k)
1846                         continue;
1847
1848                 if (!match(kp->mask, state))
1849                         continue;
1850
1851                 if (IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
1852                         continue;
1853                 if (IS_SET(MODE_NUMLOCK) && kp->appkey == 2)
1854                         continue;
1855
1856                 if (IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
1857                         continue;
1858
1859                 return kp->s;
1860         }
1861
1862         return NULL;
1863 }
1864
1865 void
1866 kpress(XEvent *ev)
1867 {
1868         XKeyEvent *e = &ev->xkey;
1869         KeySym ksym;
1870         char buf[64], *customkey;
1871         int len;
1872         Rune c;
1873         Status status;
1874         Shortcut *bp;
1875
1876         if (IS_SET(MODE_KBDLOCK))
1877                 return;
1878
1879         if (xw.ime.xic)
1880                 len = XmbLookupString(xw.ime.xic, e, buf, sizeof buf, &ksym, &status);
1881         else
1882                 len = XLookupString(e, buf, sizeof buf, &ksym, NULL);
1883         /* 1. shortcuts */
1884         for (bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
1885                 if (ksym == bp->keysym && match(bp->mod, e->state)) {
1886                         bp->func(&(bp->arg));
1887                         return;
1888                 }
1889         }
1890
1891         /* 2. custom keys from config.h */
1892         if ((customkey = kmap(ksym, e->state))) {
1893                 ttywrite(customkey, strlen(customkey), 1);
1894                 return;
1895         }
1896
1897         /* 3. composed string from input method */
1898         if (len == 0)
1899                 return;
1900         if (len == 1 && e->state & Mod1Mask) {
1901                 if (IS_SET(MODE_8BIT)) {
1902                         if (*buf < 0177) {
1903                                 c = *buf | 0x80;
1904                                 len = utf8encode(c, buf);
1905                         }
1906                 } else {
1907                         buf[1] = buf[0];
1908                         buf[0] = '\033';
1909                         len = 2;
1910                 }
1911         }
1912         ttywrite(buf, len, 1);
1913 }
1914
1915 void
1916 cmessage(XEvent *e)
1917 {
1918         /*
1919          * See xembed specs
1920          *  http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
1921          */
1922         if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
1923                 if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
1924                         win.mode |= MODE_FOCUSED;
1925                         xseturgency(0);
1926                 } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
1927                         win.mode &= ~MODE_FOCUSED;
1928                 }
1929         } else if (e->xclient.data.l[0] == xw.wmdeletewin) {
1930                 ttyhangup();
1931                 exit(0);
1932         }
1933 }
1934
1935 void
1936 resize(XEvent *e)
1937 {
1938         if (e->xconfigure.width == win.w && e->xconfigure.height == win.h)
1939                 return;
1940
1941         cresize(e->xconfigure.width, e->xconfigure.height);
1942 }
1943
1944 void
1945 run(void)
1946 {
1947         XEvent ev;
1948         int w = win.w, h = win.h;
1949         fd_set rfd;
1950         int xfd = XConnectionNumber(xw.dpy), ttyfd, xev, drawing;
1951         struct timespec seltv, *tv, now, lastblink, trigger;
1952         double timeout;
1953
1954         /* Waiting for window mapping */
1955         do {
1956                 XNextEvent(xw.dpy, &ev);
1957                 /*
1958                  * This XFilterEvent call is required because of XOpenIM. It
1959                  * does filter out the key event and some client message for
1960                  * the input method too.
1961                  */
1962                 if (XFilterEvent(&ev, None))
1963                         continue;
1964                 if (ev.type == ConfigureNotify) {
1965                         w = ev.xconfigure.width;
1966                         h = ev.xconfigure.height;
1967                 }
1968         } while (ev.type != MapNotify);
1969
1970         ttyfd = ttynew(opt_line, shell, opt_io, opt_cmd);
1971         cresize(w, h);
1972
1973         for (timeout = -1, drawing = 0, lastblink = (struct timespec){0};;) {
1974                 FD_ZERO(&rfd);
1975                 FD_SET(ttyfd, &rfd);
1976                 FD_SET(xfd, &rfd);
1977
1978                 if (XPending(xw.dpy))
1979                         timeout = 0;  /* existing events might not set xfd */
1980
1981                 seltv.tv_sec = timeout / 1E3;
1982                 seltv.tv_nsec = 1E6 * (timeout - 1E3 * seltv.tv_sec);
1983                 tv = timeout >= 0 ? &seltv : NULL;
1984
1985                 if (pselect(MAX(xfd, ttyfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
1986                         if (errno == EINTR)
1987                                 continue;
1988                         die("select failed: %s\n", strerror(errno));
1989                 }
1990                 clock_gettime(CLOCK_MONOTONIC, &now);
1991
1992                 if (FD_ISSET(ttyfd, &rfd))
1993                         ttyread();
1994
1995                 xev = 0;
1996                 while (XPending(xw.dpy)) {
1997                         xev = 1;
1998                         XNextEvent(xw.dpy, &ev);
1999                         if (XFilterEvent(&ev, None))
2000                                 continue;
2001                         if (handler[ev.type])
2002                                 (handler[ev.type])(&ev);
2003                 }
2004
2005                 /*
2006                  * To reduce flicker and tearing, when new content or event
2007                  * triggers drawing, we first wait a bit to ensure we got
2008                  * everything, and if nothing new arrives - we draw.
2009                  * We start with trying to wait minlatency ms. If more content
2010                  * arrives sooner, we retry with shorter and shorter periods,
2011                  * and eventually draw even without idle after maxlatency ms.
2012                  * Typically this results in low latency while interacting,
2013                  * maximum latency intervals during `cat huge.txt`, and perfect
2014                  * sync with periodic updates from animations/key-repeats/etc.
2015                  */
2016                 if (FD_ISSET(ttyfd, &rfd) || xev) {
2017                         if (!drawing) {
2018                                 trigger = now;
2019                                 drawing = 1;
2020                         }
2021                         timeout = (maxlatency - TIMEDIFF(now, trigger)) \
2022                                   / maxlatency * minlatency;
2023                         if (timeout > 0)
2024                                 continue;  /* we have time, try to find idle */
2025                 }
2026
2027                 /* idle detected or maxlatency exhausted -> draw */
2028                 timeout = -1;
2029                 if (blinktimeout && tattrset(ATTR_BLINK)) {
2030                         timeout = blinktimeout - TIMEDIFF(now, lastblink);
2031                         if (timeout <= 0) {
2032                                 if (-timeout > blinktimeout) /* start visible */
2033                                         win.mode |= MODE_BLINK;
2034                                 win.mode ^= MODE_BLINK;
2035                                 tsetdirtattr(ATTR_BLINK);
2036                                 lastblink = now;
2037                                 timeout = blinktimeout;
2038                         }
2039                 }
2040
2041                 draw();
2042                 XFlush(xw.dpy);
2043                 drawing = 0;
2044         }
2045 }
2046
2047 int
2048 resource_load(XrmDatabase db, char *name, enum resource_type rtype, void *dst)
2049 {
2050         char **sdst = dst;
2051         int *idst = dst;
2052         float *fdst = dst;
2053
2054         char fullname[256];
2055         char fullclass[256];
2056         char *type;
2057         XrmValue ret;
2058
2059         snprintf(fullname, sizeof(fullname), "%s.%s",
2060                         opt_name ? opt_name : "st", name);
2061         snprintf(fullclass, sizeof(fullclass), "%s.%s",
2062                         opt_class ? opt_class : "St", name);
2063         fullname[sizeof(fullname) - 1] = fullclass[sizeof(fullclass) - 1] = '\0';
2064
2065         XrmGetResource(db, fullname, fullclass, &type, &ret);
2066         if (ret.addr == NULL || strncmp("String", type, 64))
2067                 return 1;
2068
2069         switch (rtype) {
2070         case STRING:
2071                 *sdst = ret.addr;
2072                 break;
2073         case INTEGER:
2074                 *idst = strtoul(ret.addr, NULL, 10);
2075                 break;
2076         case FLOAT:
2077                 *fdst = strtof(ret.addr, NULL);
2078                 break;
2079         }
2080         return 0;
2081 }
2082
2083 void
2084 config_init(void)
2085 {
2086         char *resm;
2087         XrmDatabase db;
2088         ResourcePref *p;
2089
2090         XrmInitialize();
2091         resm = XResourceManagerString(xw.dpy);
2092         if (!resm)
2093                 return;
2094
2095         db = XrmGetStringDatabase(resm);
2096         for (p = resources; p < resources + LEN(resources); p++)
2097                 resource_load(db, p->name, p->type, p->dst);
2098 }
2099
2100 void
2101 usage(void)
2102 {
2103         die("usage: %s [-aiv] [-c class] [-f font] [-g geometry]"
2104             " [-n name] [-o file]\n"
2105             "          [-T title] [-t title] [-w windowid]"
2106             " [[-e] command [args ...]]\n"
2107             "       %s [-aiv] [-c class] [-f font] [-g geometry]"
2108             " [-n name] [-o file]\n"
2109             "          [-T title] [-t title] [-w windowid] -l line"
2110             " [stty_args ...]\n", argv0, argv0);
2111 }
2112
2113 int
2114 main(int argc, char *argv[])
2115 {
2116         xw.l = xw.t = 0;
2117         xw.isfixed = False;
2118         xsetcursor(cursorshape);
2119
2120         ARGBEGIN {
2121         case 'a':
2122                 allowaltscreen = 0;
2123                 break;
2124         case 'A':
2125                 opt_alpha = EARGF(usage());
2126                 break;
2127         case 'c':
2128                 opt_class = EARGF(usage());
2129                 break;
2130         case 'e':
2131                 if (argc > 0)
2132                         --argc, ++argv;
2133                 goto run;
2134         case 'f':
2135                 opt_font = EARGF(usage());
2136                 break;
2137         case 'g':
2138                 xw.gm = XParseGeometry(EARGF(usage()),
2139                                 &xw.l, &xw.t, &cols, &rows);
2140                 break;
2141         case 'i':
2142                 xw.isfixed = 1;
2143                 break;
2144         case 'o':
2145                 opt_io = EARGF(usage());
2146                 break;
2147         case 'l':
2148                 opt_line = EARGF(usage());
2149                 break;
2150         case 'n':
2151                 opt_name = EARGF(usage());
2152                 break;
2153         case 't':
2154         case 'T':
2155                 opt_title = EARGF(usage());
2156                 break;
2157         case 'w':
2158                 opt_embed = EARGF(usage());
2159                 break;
2160         case 'v':
2161                 die("%s " VERSION "\n", argv0);
2162                 break;
2163         default:
2164                 usage();
2165         } ARGEND;
2166
2167 run:
2168         if (argc > 0) /* eat all remaining arguments */
2169                 opt_cmd = argv;
2170
2171         if (!opt_title)
2172                 opt_title = (opt_line || !opt_cmd) ? "st" : opt_cmd[0];
2173
2174         setlocale(LC_CTYPE, "");
2175         XSetLocaleModifiers("");
2176
2177         if(!(xw.dpy = XOpenDisplay(NULL)))
2178                 die("Can't open display\n");
2179
2180         config_init();
2181         cols = MAX(cols, 1);
2182         rows = MAX(rows, 1);
2183         tnew(cols, rows);
2184         xinit(cols, rows);
2185         xsetenv();
2186         selinit();
2187         run();
2188
2189         return 0;
2190 }