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 static 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 b;
  33         uint mask;
  34         char *s;
  35 } MouseShortcut;
  36
  37 typedef struct {
  38         KeySym k;
  39         uint mask;
  40         char *s;
  41         /* three-valued logic variables: 0 indifferent, 1 on, -1 off */
  42         signed char appkey;    /* application keypad */
  43         signed char appcursor; /* application cursor */
  44 } Key;
  45
  46 /* X modifiers */
  47 #define XK_ANY_MOD    UINT_MAX
  48 #define XK_NO_MOD     0
  49 #define XK_SWITCH_MOD (1<<13)
  50
  51 /* function definitions used in config.h */
  52 static void clipcopy(const Arg *);
  53 static void clippaste(const Arg *);
  54 static void numlock(const Arg *);
  55 static void selpaste(const Arg *);
  56 static void zoom(const Arg *);
  57 static void zoomabs(const Arg *);
  58 static void zoomreset(const Arg *);
  59
  60 /* config.h for applying patches and the configuration. */
  61 #include "config.h"
  62
  63 /* XEMBED messages */
  64 #define XEMBED_FOCUS_IN  4
  65 #define XEMBED_FOCUS_OUT 5
  66
  67 /* macros */
  68 #define IS_SET(flag)            ((win.mode & (flag)) != 0)
  69 #define TRUERED(x)              (((x) & 0xff0000) >> 8)
  70 #define TRUEGREEN(x)            (((x) & 0xff00))
  71 #define TRUEBLUE(x)             (((x) & 0xff) << 8)
  72
  73 typedef XftDraw *Draw;
  74 typedef XftColor Color;
  75 typedef XftGlyphFontSpec GlyphFontSpec;
  76
  77 /* Purely graphic info */
  78 typedef struct {
  79         int tw, th; /* tty width and height */
  80         int w, h; /* window width and height */
  81         int ch; /* char height */
  82         int cw; /* char width  */
  83         int mode; /* window state/mode flags */
  84         int cursor; /* cursor style */
  85 } TermWindow;
  86
  87 typedef struct {
  88         Display *dpy;
  89         Colormap cmap;
  90         Window win;
  91         Drawable buf;
  92         GlyphFontSpec *specbuf; /* font spec buffer used for rendering */
  93         Atom xembed, wmdeletewin, netwmname, netwmpid;
  94         XIM xim;
  95         XIC xic;
  96         Draw draw;
  97         Visual *vis;
  98         XSetWindowAttributes attrs;
  99         int scr;
 100         int isfixed; /* is fixed geometry? */
 101         int l, t; /* left and top offset */
 102         int gm; /* geometry mask */
 103 } XWindow;
 104
 105 typedef struct {
 106         Atom xtarget;
 107         char *primary, *clipboard;
 108         struct timespec tclick1;
 109         struct timespec tclick2;
 110 } XSelection;
 111
 112 /* Font structure */
 113 #define Font Font_
 114 typedef struct {
 115         int height;
 116         int width;
 117         int ascent;
 118         int descent;
 119         int badslant;
 120         int badweight;
 121         short lbearing;
 122         short rbearing;
 123         XftFont *match;
 124         FcFontSet *set;
 125         FcPattern *pattern;
 126 } Font;
 127
 128 /* Drawing Context */
 129 typedef struct {
 130         Color *col;
 131         size_t collen;
 132         Font font, bfont, ifont, ibfont;
 133         GC gc;
 134 } DC;
 135
 136 static inline ushort sixd_to_16bit(int);
 137 static int xmakeglyphfontspecs(XftGlyphFontSpec *, const Glyph *, int, int, int);
 138 static void xdrawglyphfontspecs(const XftGlyphFontSpec *, Glyph, int, int, int);
 139 static void xdrawglyph(Glyph, int, int);
 140 static void xclear(int, int, int, int);
 141 static int xgeommasktogravity(int);
 142 static void xinit(int, int);
 143 static void cresize(int, int);
 144 static void xresize(int, int);
 145 static void xhints(void);
 146 static int xloadcolor(int, const char *, Color *);
 147 static int xloadfont(Font *, FcPattern *);
 148 static void xloadfonts(char *, double);
 149 static void xunloadfont(Font *);
 150 static void xunloadfonts(void);
 151 static void xsetenv(void);
 152 static void xseturgency(int);
 153 static int evcol(XEvent *);
 154 static int evrow(XEvent *);
 155
 156 static void expose(XEvent *);
 157 static void visibility(XEvent *);
 158 static void unmap(XEvent *);
 159 static void kpress(XEvent *);
 160 static void cmessage(XEvent *);
 161 static void resize(XEvent *);
 162 static void focus(XEvent *);
 163 static void brelease(XEvent *);
 164 static void bpress(XEvent *);
 165 static void bmotion(XEvent *);
 166 static void propnotify(XEvent *);
 167 static void selnotify(XEvent *);
 168 static void selclear_(XEvent *);
 169 static void selrequest(XEvent *);
 170 static void setsel(char *, Time);
 171 static void mousesel(XEvent *, int);
 172 static void mousereport(XEvent *);
 173 static char *kmap(KeySym, uint);
 174 static int match(uint, uint);
 175
 176 static void run(void);
 177 static void usage(void);
 178
 179 static void (*handler[LASTEvent])(XEvent *) = {
 180         [KeyPress] = kpress,
 181         [ClientMessage] = cmessage,
 182         [ConfigureNotify] = resize,
 183         [VisibilityNotify] = visibility,
 184         [UnmapNotify] = unmap,
 185         [Expose] = expose,
 186         [FocusIn] = focus,
 187         [FocusOut] = focus,
 188         [MotionNotify] = bmotion,
 189         [ButtonPress] = bpress,
 190         [ButtonRelease] = brelease,
 191 /*
 192  * Uncomment if you want the selection to disappear when you select something
 193  * different in another window.
 194  */
 195 /*      [SelectionClear] = selclear_, */
 196         [SelectionNotify] = selnotify,
 197 /*
 198  * PropertyNotify is only turned on when there is some INCR transfer happening
 199  * for the selection retrieval.
 200  */
 201         [PropertyNotify] = propnotify,
 202         [SelectionRequest] = selrequest,
 203 };
 204
 205 /* Globals */
 206 static DC dc;
 207 static XWindow xw;
 208 static XSelection xsel;
 209 static TermWindow win;
 210
 211 /* Font Ring Cache */
 212 enum {
 213         FRC_NORMAL,
 214         FRC_ITALIC,
 215         FRC_BOLD,
 216         FRC_ITALICBOLD
 217 };
 218
 219 typedef struct {
 220         XftFont *font;
 221         int flags;
 222         Rune unicodep;
 223 } Fontcache;
 224
 225 /* Fontcache is an array now. A new font will be appended to the array. */
 226 static Fontcache frc[16];
 227 static int frclen = 0;
 228 static char *usedfont = NULL;
 229 static double usedfontsize = 0;
 230 static double defaultfontsize = 0;
 231
 232 static char *opt_class = NULL;
 233 static char **opt_cmd  = NULL;
 234 static char *opt_embed = NULL;
 235 static char *opt_font  = NULL;
 236 static char *opt_io    = NULL;
 237 static char *opt_line  = NULL;
 238 static char *opt_name  = NULL;
 239 static char *opt_title = NULL;
 240
 241 static int oldbutton = 3; /* button event on startup: 3 = release */
 242
 243 void
 244 clipcopy(const Arg *dummy)
 245 {
 246         Atom clipboard;
 247
 248         free(xsel.clipboard);
 249         xsel.clipboard = NULL;
 250
 251         if (xsel.primary != NULL) {
 252                 xsel.clipboard = xstrdup(xsel.primary);
 253                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 254                 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
 255         }
 256 }
 257
 258 void
 259 clippaste(const Arg *dummy)
 260 {
 261         Atom clipboard;
 262
 263         clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 264         XConvertSelection(xw.dpy, clipboard, xsel.xtarget, clipboard,
 265                         xw.win, CurrentTime);
 266 }
 267
 268 void
 269 selpaste(const Arg *dummy)
 270 {
 271         XConvertSelection(xw.dpy, XA_PRIMARY, xsel.xtarget, XA_PRIMARY,
 272                         xw.win, CurrentTime);
 273 }
 274
 275 void
 276 numlock(const Arg *dummy)
 277 {
 278         win.mode ^= MODE_NUMLOCK;
 279 }
 280
 281 void
 282 zoom(const Arg *arg)
 283 {
 284         Arg larg;
 285
 286         larg.f = usedfontsize + arg->f;
 287         zoomabs(&larg);
 288 }
 289
 290 void
 291 zoomabs(const Arg *arg)
 292 {
 293         xunloadfonts();
 294         xloadfonts(usedfont, arg->f);
 295         cresize(0, 0);
 296         redraw();
 297         xhints();
 298 }
 299
 300 void
 301 zoomreset(const Arg *arg)
 302 {
 303         Arg larg;
 304
 305         if (defaultfontsize > 0) {
 306                 larg.f = defaultfontsize;
 307                 zoomabs(&larg);
 308         }
 309 }
 310
 311 int
 312 evcol(XEvent *e)
 313 {
 314         int x = e->xbutton.x - borderpx;
 315         LIMIT(x, 0, win.tw - 1);
 316         return x / win.cw;
 317 }
 318
 319 int
 320 evrow(XEvent *e)
 321 {
 322         int y = e->xbutton.y - borderpx;
 323         LIMIT(y, 0, win.th - 1);
 324         return y / win.ch;
 325 }
 326
 327 void
 328 mousesel(XEvent *e, int done)
 329 {
 330         int type, seltype = SEL_REGULAR;
 331         uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
 332
 333         for (type = 1; type < LEN(selmasks); ++type) {
 334                 if (match(selmasks[type], state)) {
 335                         seltype = type;
 336                         break;
 337                 }
 338         }
 339         selextend(evcol(e), evrow(e), seltype, done);
 340         if (done)
 341                 setsel(getsel(), e->xbutton.time);
 342 }
 343
 344 void
 345 mousereport(XEvent *e)
 346 {
 347         int len, x = evcol(e), y = evrow(e),
 348             button = e->xbutton.button, state = e->xbutton.state;
 349         char buf[40];
 350         static int ox, oy;
 351
 352         /* from urxvt */
 353         if (e->xbutton.type == MotionNotify) {
 354                 if (x == ox && y == oy)
 355                         return;
 356                 if (!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
 357                         return;
 358                 /* MOUSE_MOTION: no reporting if no button is pressed */
 359                 if (IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
 360                         return;
 361
 362                 button = oldbutton + 32;
 363                 ox = x;
 364                 oy = y;
 365         } else {
 366                 if (!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
 367                         button = 3;
 368                 } else {
 369                         button -= Button1;
 370                         if (button >= 3)
 371                                 button += 64 - 3;
 372                 }
 373                 if (e->xbutton.type == ButtonPress) {
 374                         oldbutton = button;
 375                         ox = x;
 376                         oy = y;
 377                 } else if (e->xbutton.type == ButtonRelease) {
 378                         oldbutton = 3;
 379                         /* MODE_MOUSEX10: no button release reporting */
 380                         if (IS_SET(MODE_MOUSEX10))
 381                                 return;
 382                         if (button == 64 || button == 65)
 383                                 return;
 384                 }
 385         }
 386
 387         if (!IS_SET(MODE_MOUSEX10)) {
 388                 button += ((state & ShiftMask  ) ? 4  : 0)
 389                         + ((state & Mod4Mask   ) ? 8  : 0)
 390                         + ((state & ControlMask) ? 16 : 0);
 391         }
 392
 393         if (IS_SET(MODE_MOUSESGR)) {
 394                 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
 395                                 button, x+1, y+1,
 396                                 e->xbutton.type == ButtonRelease ? 'm' : 'M');
 397         } else if (x < 223 && y < 223) {
 398                 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
 399                                 32+button, 32+x+1, 32+y+1);
 400         } else {
 401                 return;
 402         }
 403
 404         ttywrite(buf, len, 0);
 405 }
 406
 407 void
 408 bpress(XEvent *e)
 409 {
 410         struct timespec now;
 411         MouseShortcut *ms;
 412         int snap;
 413
 414         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 415                 mousereport(e);
 416                 return;
 417         }
 418
 419         for (ms = mshortcuts; ms < mshortcuts + LEN(mshortcuts); ms++) {
 420                 if (e->xbutton.button == ms->b
 421                                 && match(ms->mask, e->xbutton.state)) {
 422                         ttywrite(ms->s, strlen(ms->s), 1);
 423                         return;
 424                 }
 425         }
 426
 427         if (e->xbutton.button == Button1) {
 428                 /*
 429                  * If the user clicks below predefined timeouts specific
 430                  * snapping behaviour is exposed.
 431                  */
 432                 clock_gettime(CLOCK_MONOTONIC, &now);
 433                 if (TIMEDIFF(now, xsel.tclick2) <= tripleclicktimeout) {
 434                         snap = SNAP_LINE;
 435                 } else if (TIMEDIFF(now, xsel.tclick1) <= doubleclicktimeout) {
 436                         snap = SNAP_WORD;
 437                 } else {
 438                         snap = 0;
 439                 }
 440                 xsel.tclick2 = xsel.tclick1;
 441                 xsel.tclick1 = now;
 442
 443                 selstart(evcol(e), evrow(e), snap);
 444         }
 445 }
 446
 447 void
 448 propnotify(XEvent *e)
 449 {
 450         XPropertyEvent *xpev;
 451         Atom clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 452
 453         xpev = &e->xproperty;
 454         if (xpev->state == PropertyNewValue &&
 455                         (xpev->atom == XA_PRIMARY ||
 456                          xpev->atom == clipboard)) {
 457                 selnotify(e);
 458         }
 459 }
 460
 461 void
 462 selnotify(XEvent *e)
 463 {
 464         ulong nitems, ofs, rem;
 465         int format;
 466         uchar *data, *last, *repl;
 467         Atom type, incratom, property = None;
 468
 469         incratom = XInternAtom(xw.dpy, "INCR", 0);
 470
 471         ofs = 0;
 472         if (e->type == SelectionNotify)
 473                 property = e->xselection.property;
 474         else if (e->type == PropertyNotify)
 475                 property = e->xproperty.atom;
 476
 477         if (property == None)
 478                 return;
 479
 480         do {
 481                 if (XGetWindowProperty(xw.dpy, xw.win, property, ofs,
 482                                         BUFSIZ/4, False, AnyPropertyType,
 483                                         &type, &format, &nitems, &rem,
 484                                         &data)) {
 485                         fprintf(stderr, "Clipboard allocation failed\n");
 486                         return;
 487                 }
 488
 489                 if (e->type == PropertyNotify && nitems == 0 && rem == 0) {
 490                         /*
 491                          * If there is some PropertyNotify with no data, then
 492                          * this is the signal of the selection owner that all
 493                          * data has been transferred. We won't need to receive
 494                          * PropertyNotify events anymore.
 495                          */
 496                         MODBIT(xw.attrs.event_mask, 0, PropertyChangeMask);
 497                         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
 498                                         &xw.attrs);
 499                 }
 500
 501                 if (type == incratom) {
 502                         /*
 503                          * Activate the PropertyNotify events so we receive
 504                          * when the selection owner does send us the next
 505                          * chunk of data.
 506                          */
 507                         MODBIT(xw.attrs.event_mask, 1, PropertyChangeMask);
 508                         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
 509                                         &xw.attrs);
 510
 511                         /*
 512                          * Deleting the property is the transfer start signal.
 513                          */
 514                         XDeleteProperty(xw.dpy, xw.win, (int)property);
 515                         continue;
 516                 }
 517
 518                 /*
 519                  * As seen in getsel:
 520                  * Line endings are inconsistent in the terminal and GUI world
 521                  * copy and pasting. When receiving some selection data,
 522                  * replace all '\n' with '\r'.
 523                  * FIXME: Fix the computer world.
 524                  */
 525                 repl = data;
 526                 last = data + nitems * format / 8;
 527                 while ((repl = memchr(repl, '\n', last - repl))) {
 528                         *repl++ = '\r';
 529                 }
 530
 531                 if (IS_SET(MODE_BRCKTPASTE) && ofs == 0)
 532                         ttywrite("\033[200~", 6, 0);
 533                 ttywrite((char *)data, nitems * format / 8, 1);
 534                 if (IS_SET(MODE_BRCKTPASTE) && rem == 0)
 535                         ttywrite("\033[201~", 6, 0);
 536                 XFree(data);
 537                 /* number of 32-bit chunks returned */
 538                 ofs += nitems * format / 32;
 539         } while (rem > 0);
 540
 541         /*
 542          * Deleting the property again tells the selection owner to send the
 543          * next data chunk in the property.
 544          */
 545         XDeleteProperty(xw.dpy, xw.win, (int)property);
 546 }
 547
 548 void
 549 xclipcopy(void)
 550 {
 551         clipcopy(NULL);
 552 }
 553
 554 void
 555 selclear_(XEvent *e)
 556 {
 557         selclear();
 558 }
 559
 560 void
 561 selrequest(XEvent *e)
 562 {
 563         XSelectionRequestEvent *xsre;
 564         XSelectionEvent xev;
 565         Atom xa_targets, string, clipboard;
 566         char *seltext;
 567
 568         xsre = (XSelectionRequestEvent *) e;
 569         xev.type = SelectionNotify;
 570         xev.requestor = xsre->requestor;
 571         xev.selection = xsre->selection;
 572         xev.target = xsre->target;
 573         xev.time = xsre->time;
 574         if (xsre->property == None)
 575                 xsre->property = xsre->target;
 576
 577         /* reject */
 578         xev.property = None;
 579
 580         xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
 581         if (xsre->target == xa_targets) {
 582                 /* respond with the supported type */
 583                 string = xsel.xtarget;
 584                 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
 585                                 XA_ATOM, 32, PropModeReplace,
 586                                 (uchar *) &string, 1);
 587                 xev.property = xsre->property;
 588         } else if (xsre->target == xsel.xtarget || xsre->target == XA_STRING) {
 589                 /*
 590                  * xith XA_STRING non ascii characters may be incorrect in the
 591                  * requestor. It is not our problem, use utf8.
 592                  */
 593                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 594                 if (xsre->selection == XA_PRIMARY) {
 595                         seltext = xsel.primary;
 596                 } else if (xsre->selection == clipboard) {
 597                         seltext = xsel.clipboard;
 598                 } else {
 599                         fprintf(stderr,
 600                                 "Unhandled clipboard selection 0x%lx\n",
 601                                 xsre->selection);
 602                         return;
 603                 }
 604                 if (seltext != NULL) {
 605                         XChangeProperty(xsre->display, xsre->requestor,
 606                                         xsre->property, xsre->target,
 607                                         8, PropModeReplace,
 608                                         (uchar *)seltext, strlen(seltext));
 609                         xev.property = xsre->property;
 610                 }
 611         }
 612
 613         /* all done, send a notification to the listener */
 614         if (!XSendEvent(xsre->display, xsre->requestor, 1, 0, (XEvent *) &xev))
 615                 fprintf(stderr, "Error sending SelectionNotify event\n");
 616 }
 617
 618 void
 619 setsel(char *str, Time t)
 620 {
 621         if (!str)
 622                 return;
 623
 624         free(xsel.primary);
 625         xsel.primary = str;
 626
 627         XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
 628         if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
 629                 selclear();
 630 }
 631
 632 void
 633 xsetsel(char *str)
 634 {
 635         setsel(str, CurrentTime);
 636 }
 637
 638 void
 639 brelease(XEvent *e)
 640 {
 641         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 642                 mousereport(e);
 643                 return;
 644         }
 645
 646         if (e->xbutton.button == Button2)
 647                 selpaste(NULL);
 648         else if (e->xbutton.button == Button1)
 649                 mousesel(e, 1);
 650 }
 651
 652 void
 653 bmotion(XEvent *e)
 654 {
 655         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 656                 mousereport(e);
 657                 return;
 658         }
 659
 660         mousesel(e, 0);
 661 }
 662
 663 void
 664 cresize(int width, int height)
 665 {
 666         int col, row;
 667
 668         if (width != 0)
 669                 win.w = width;
 670         if (height != 0)
 671                 win.h = height;
 672
 673         col = (win.w - 2 * borderpx) / win.cw;
 674         row = (win.h - 2 * borderpx) / win.ch;
 675
 676         tresize(col, row);
 677         xresize(col, row);
 678         ttyresize(win.tw, win.th);
 679 }
 680
 681 void
 682 xresize(int col, int row)
 683 {
 684         win.tw = MAX(1, col * win.cw);
 685         win.th = MAX(1, row * win.ch);
 686
 687         XFreePixmap(xw.dpy, xw.buf);
 688         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
 689                         DefaultDepth(xw.dpy, xw.scr));
 690         XftDrawChange(xw.draw, xw.buf);
 691         xclear(0, 0, win.w, win.h);
 692
 693         /* resize to new width */
 694         xw.specbuf = xrealloc(xw.specbuf, col * sizeof(GlyphFontSpec));
 695 }
 696
 697 ushort
 698 sixd_to_16bit(int x)
 699 {
 700         return x == 0 ? 0 : 0x3737 + 0x2828 * x;
 701 }
 702
 703 int
 704 xloadcolor(int i, const char *name, Color *ncolor)
 705 {
 706         XRenderColor color = { .alpha = 0xffff };
 707
 708         if (!name) {
 709                 if (BETWEEN(i, 16, 255)) { /* 256 color */
 710                         if (i < 6*6*6+16) { /* same colors as xterm */
 711                                 color.red   = sixd_to_16bit( ((i-16)/36)%6 );
 712                                 color.green = sixd_to_16bit( ((i-16)/6) %6 );
 713                                 color.blue  = sixd_to_16bit( ((i-16)/1) %6 );
 714                         } else { /* greyscale */
 715                                 color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
 716                                 color.green = color.blue = color.red;
 717                         }
 718                         return XftColorAllocValue(xw.dpy, xw.vis,
 719                                                   xw.cmap, &color, ncolor);
 720                 } else
 721                         name = colorname[i];
 722         }
 723
 724         return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
 725 }
 726
 727 void
 728 xloadcols(void)
 729 {
 730         int i;
 731         static int loaded;
 732         Color *cp;
 733
 734         dc.collen = MAX(LEN(colorname), 256);
 735         dc.col = xmalloc(dc.collen * sizeof(Color));
 736
 737         if (loaded) {
 738                 for (cp = dc.col; cp < &dc.col[dc.collen]; ++cp)
 739                         XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
 740         }
 741
 742         for (i = 0; i < dc.collen; i++)
 743                 if (!xloadcolor(i, NULL, &dc.col[i])) {
 744                         if (colorname[i])
 745                                 die("Could not allocate color '%s'\n", colorname[i]);
 746                         else
 747                                 die("Could not allocate color %d\n", i);
 748                 }
 749         loaded = 1;
 750 }
 751
 752 int
 753 xsetcolorname(int x, const char *name)
 754 {
 755         Color ncolor;
 756
 757         if (!BETWEEN(x, 0, dc.collen))
 758                 return 1;
 759
 760
 761         if (!xloadcolor(x, name, &ncolor))
 762                 return 1;
 763
 764         XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
 765         dc.col[x] = ncolor;
 766
 767         return 0;
 768 }
 769
 770 /*
 771  * Absolute coordinates.
 772  */
 773 void
 774 xclear(int x1, int y1, int x2, int y2)
 775 {
 776         XftDrawRect(xw.draw,
 777                         &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
 778                         x1, y1, x2-x1, y2-y1);
 779 }
 780
 781 void
 782 xhints(void)
 783 {
 784         XClassHint class = {opt_name ? opt_name : termname,
 785                             opt_class ? opt_class : termname};
 786         XWMHints wm = {.flags = InputHint, .input = 1};
 787         XSizeHints *sizeh;
 788
 789         sizeh = XAllocSizeHints();
 790
 791         sizeh->flags = PSize | PResizeInc | PBaseSize;
 792         sizeh->height = win.h;
 793         sizeh->width = win.w;
 794         sizeh->height_inc = win.ch;
 795         sizeh->width_inc = win.cw;
 796         sizeh->base_height = 2 * borderpx;
 797         sizeh->base_width = 2 * borderpx;
 798         if (xw.isfixed) {
 799                 sizeh->flags |= PMaxSize | PMinSize;
 800                 sizeh->min_width = sizeh->max_width = win.w;
 801                 sizeh->min_height = sizeh->max_height = win.h;
 802         }
 803         if (xw.gm & (XValue|YValue)) {
 804                 sizeh->flags |= USPosition | PWinGravity;
 805                 sizeh->x = xw.l;
 806                 sizeh->y = xw.t;
 807                 sizeh->win_gravity = xgeommasktogravity(xw.gm);
 808         }
 809
 810         XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
 811                         &class);
 812         XFree(sizeh);
 813 }
 814
 815 int
 816 xgeommasktogravity(int mask)
 817 {
 818         switch (mask & (XNegative|YNegative)) {
 819         case 0:
 820                 return NorthWestGravity;
 821         case XNegative:
 822                 return NorthEastGravity;
 823         case YNegative:
 824                 return SouthWestGravity;
 825         }
 826
 827         return SouthEastGravity;
 828 }
 829
 830 int
 831 xloadfont(Font *f, FcPattern *pattern)
 832 {
 833         FcPattern *configured;
 834         FcPattern *match;
 835         FcResult result;
 836         XGlyphInfo extents;
 837         int wantattr, haveattr;
 838
 839         /*
 840          * Manually configure instead of calling XftMatchFont
 841          * so that we can use the configured pattern for
 842          * "missing glyph" lookups.
 843          */
 844         configured = FcPatternDuplicate(pattern);
 845         if (!configured)
 846                 return 1;
 847
 848         FcConfigSubstitute(NULL, configured, FcMatchPattern);
 849         XftDefaultSubstitute(xw.dpy, xw.scr, configured);
 850
 851         match = FcFontMatch(NULL, configured, &result);
 852         if (!match) {
 853                 FcPatternDestroy(configured);
 854                 return 1;
 855         }
 856
 857         if (!(f->match = XftFontOpenPattern(xw.dpy, match))) {
 858                 FcPatternDestroy(configured);
 859                 FcPatternDestroy(match);
 860                 return 1;
 861         }
 862
 863         if ((XftPatternGetInteger(pattern, "slant", 0, &wantattr) ==
 864             XftResultMatch)) {
 865                 /*
 866                  * Check if xft was unable to find a font with the appropriate
 867                  * slant but gave us one anyway. Try to mitigate.
 868                  */
 869                 if ((XftPatternGetInteger(f->match->pattern, "slant", 0,
 870                     &haveattr) != XftResultMatch) || haveattr < wantattr) {
 871                         f->badslant = 1;
 872                         fputs("st: font slant does not match\n", stderr);
 873                 }
 874         }
 875
 876         if ((XftPatternGetInteger(pattern, "weight", 0, &wantattr) ==
 877             XftResultMatch)) {
 878                 if ((XftPatternGetInteger(f->match->pattern, "weight", 0,
 879                     &haveattr) != XftResultMatch) || haveattr != wantattr) {
 880                         f->badweight = 1;
 881                         fputs("st: font weight does not match\n", stderr);
 882                 }
 883         }
 884
 885         XftTextExtentsUtf8(xw.dpy, f->match,
 886                 (const FcChar8 *) ascii_printable,
 887                 strlen(ascii_printable), &extents);
 888
 889         f->set = NULL;
 890         f->pattern = configured;
 891
 892         f->ascent = f->match->ascent;
 893         f->descent = f->match->descent;
 894         f->lbearing = 0;
 895         f->rbearing = f->match->max_advance_width;
 896
 897         f->height = f->ascent + f->descent;
 898         f->width = DIVCEIL(extents.xOff, strlen(ascii_printable));
 899
 900         return 0;
 901 }
 902
 903 void
 904 xloadfonts(char *fontstr, double fontsize)
 905 {
 906         FcPattern *pattern;
 907         double fontval;
 908
 909         if (fontstr[0] == '-') {
 910                 pattern = XftXlfdParse(fontstr, False, False);
 911         } else {
 912                 pattern = FcNameParse((FcChar8 *)fontstr);
 913         }
 914
 915         if (!pattern)
 916                 die("st: can't open font %s\n", fontstr);
 917
 918         if (fontsize > 1) {
 919                 FcPatternDel(pattern, FC_PIXEL_SIZE);
 920                 FcPatternDel(pattern, FC_SIZE);
 921                 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
 922                 usedfontsize = fontsize;
 923         } else {
 924                 if (FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval) ==
 925                                 FcResultMatch) {
 926                         usedfontsize = fontval;
 927                 } else if (FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval) ==
 928                                 FcResultMatch) {
 929                         usedfontsize = -1;
 930                 } else {
 931                         /*
 932                          * Default font size is 12, if none given. This is to
 933                          * have a known usedfontsize value.
 934                          */
 935                         FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
 936                         usedfontsize = 12;
 937                 }
 938                 defaultfontsize = usedfontsize;
 939         }
 940
 941         if (xloadfont(&dc.font, pattern))
 942                 die("st: can't open font %s\n", fontstr);
 943
 944         if (usedfontsize < 0) {
 945                 FcPatternGetDouble(dc.font.match->pattern,
 946                                    FC_PIXEL_SIZE, 0, &fontval);
 947                 usedfontsize = fontval;
 948                 if (fontsize == 0)
 949                         defaultfontsize = fontval;
 950         }
 951
 952         /* Setting character width and height. */
 953         win.cw = ceilf(dc.font.width * cwscale);
 954         win.ch = ceilf(dc.font.height * chscale);
 955
 956         FcPatternDel(pattern, FC_SLANT);
 957         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
 958         if (xloadfont(&dc.ifont, pattern))
 959                 die("st: can't open font %s\n", fontstr);
 960
 961         FcPatternDel(pattern, FC_WEIGHT);
 962         FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
 963         if (xloadfont(&dc.ibfont, pattern))
 964                 die("st: can't open font %s\n", fontstr);
 965
 966         FcPatternDel(pattern, FC_SLANT);
 967         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
 968         if (xloadfont(&dc.bfont, pattern))
 969                 die("st: can't open font %s\n", fontstr);
 970
 971         FcPatternDestroy(pattern);
 972 }
 973
 974 void
 975 xunloadfont(Font *f)
 976 {
 977         XftFontClose(xw.dpy, f->match);
 978         FcPatternDestroy(f->pattern);
 979         if (f->set)
 980                 FcFontSetDestroy(f->set);
 981 }
 982
 983 void
 984 xunloadfonts(void)
 985 {
 986         /* Free the loaded fonts in the font cache.  */
 987         while (frclen > 0)
 988                 XftFontClose(xw.dpy, frc[--frclen].font);
 989
 990         xunloadfont(&dc.font);
 991         xunloadfont(&dc.bfont);
 992         xunloadfont(&dc.ifont);
 993         xunloadfont(&dc.ibfont);
 994 }
 995
 996 void
 997 xinit(int cols, int rows)
 998 {
 999         XGCValues gcvalues;
1000         Cursor cursor;
1001         Window parent;
1002         pid_t thispid = getpid();
1003         XColor xmousefg, xmousebg;
1004
1005         if (!(xw.dpy = XOpenDisplay(NULL)))
1006                 die("Can't open display\n");
1007         xw.scr = XDefaultScreen(xw.dpy);
1008         xw.vis = XDefaultVisual(xw.dpy, xw.scr);
1009
1010         /* font */
1011         if (!FcInit())
1012                 die("Could not init fontconfig.\n");
1013
1014         usedfont = (opt_font == NULL)? font : opt_font;
1015         xloadfonts(usedfont, 0);
1016
1017         /* colors */
1018         xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1019         xloadcols();
1020
1021         /* adjust fixed window geometry */
1022         win.w = 2 * borderpx + cols * win.cw;
1023         win.h = 2 * borderpx + rows * win.ch;
1024         if (xw.gm & XNegative)
1025                 xw.l += DisplayWidth(xw.dpy, xw.scr) - win.w - 2;
1026         if (xw.gm & YNegative)
1027                 xw.t += DisplayHeight(xw.dpy, xw.scr) - win.h - 2;
1028
1029         /* Events */
1030         xw.attrs.background_pixel = dc.col[defaultbg].pixel;
1031         xw.attrs.border_pixel = dc.col[defaultbg].pixel;
1032         xw.attrs.bit_gravity = NorthWestGravity;
1033         xw.attrs.event_mask = FocusChangeMask | KeyPressMask
1034                 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1035                 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
1036         xw.attrs.colormap = xw.cmap;
1037
1038         if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
1039                 parent = XRootWindow(xw.dpy, xw.scr);
1040         xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
1041                         win.w, win.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
1042                         xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
1043                         | CWEventMask | CWColormap, &xw.attrs);
1044
1045         memset(&gcvalues, 0, sizeof(gcvalues));
1046         gcvalues.graphics_exposures = False;
1047         dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
1048                         &gcvalues);
1049         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
1050                         DefaultDepth(xw.dpy, xw.scr));
1051         XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
1052         XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, win.w, win.h);
1053
1054         /* font spec buffer */
1055         xw.specbuf = xmalloc(cols * sizeof(GlyphFontSpec));
1056
1057         /* Xft rendering context */
1058         xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
1059
1060         /* input methods */
1061         if ((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
1062                 XSetLocaleModifiers("@im=local");
1063                 if ((xw.xim =  XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
1064                         XSetLocaleModifiers("@im=");
1065                         if ((xw.xim = XOpenIM(xw.dpy,
1066                                         NULL, NULL, NULL)) == NULL) {
1067                                 die("XOpenIM failed. Could not open input"
1068                                         " device.\n");
1069                         }
1070                 }
1071         }
1072         xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
1073                                            | XIMStatusNothing, XNClientWindow, xw.win,
1074                                            XNFocusWindow, xw.win, NULL);
1075         if (xw.xic == NULL)
1076                 die("XCreateIC failed. Could not obtain input method.\n");
1077
1078         /* white cursor, black outline */
1079         cursor = XCreateFontCursor(xw.dpy, mouseshape);
1080         XDefineCursor(xw.dpy, xw.win, cursor);
1081
1082         if (XParseColor(xw.dpy, xw.cmap, colorname[mousefg], &xmousefg) == 0) {
1083                 xmousefg.red   = 0xffff;
1084                 xmousefg.green = 0xffff;
1085                 xmousefg.blue  = 0xffff;
1086         }
1087
1088         if (XParseColor(xw.dpy, xw.cmap, colorname[mousebg], &xmousebg) == 0) {
1089                 xmousebg.red   = 0x0000;
1090                 xmousebg.green = 0x0000;
1091                 xmousebg.blue  = 0x0000;
1092         }
1093
1094         XRecolorCursor(xw.dpy, cursor, &xmousefg, &xmousebg);
1095
1096         xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
1097         xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
1098         xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
1099         XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
1100
1101         xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
1102         XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
1103                         PropModeReplace, (uchar *)&thispid, 1);
1104
1105         win.mode = MODE_NUMLOCK;
1106         resettitle();
1107         XMapWindow(xw.dpy, xw.win);
1108         xhints();
1109         XSync(xw.dpy, False);
1110
1111         clock_gettime(CLOCK_MONOTONIC, &xsel.tclick1);
1112         clock_gettime(CLOCK_MONOTONIC, &xsel.tclick2);
1113         xsel.primary = NULL;
1114         xsel.clipboard = NULL;
1115         xsel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
1116         if (xsel.xtarget == None)
1117                 xsel.xtarget = XA_STRING;
1118 }
1119
1120 int
1121 xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x, int y)
1122 {
1123         float winx = borderpx + x * win.cw, winy = borderpx + y * win.ch, xp, yp;
1124         ushort mode, prevmode = USHRT_MAX;
1125         Font *font = &dc.font;
1126         int frcflags = FRC_NORMAL;
1127         float runewidth = win.cw;
1128         Rune rune;
1129         FT_UInt glyphidx;
1130         FcResult fcres;
1131         FcPattern *fcpattern, *fontpattern;
1132         FcFontSet *fcsets[] = { NULL };
1133         FcCharSet *fccharset;
1134         int i, f, numspecs = 0;
1135
1136         for (i = 0, xp = winx, yp = winy + font->ascent; i < len; ++i) {
1137                 /* Fetch rune and mode for current glyph. */
1138                 rune = glyphs[i].u;
1139                 mode = glyphs[i].mode;
1140
1141                 /* Skip dummy wide-character spacing. */
1142                 if (mode == ATTR_WDUMMY)
1143                         continue;
1144
1145                 /* Determine font for glyph if different from previous glyph. */
1146                 if (prevmode != mode) {
1147                         prevmode = mode;
1148                         font = &dc.font;
1149                         frcflags = FRC_NORMAL;
1150                         runewidth = win.cw * ((mode & ATTR_WIDE) ? 2.0f : 1.0f);
1151                         if ((mode & ATTR_ITALIC) && (mode & ATTR_BOLD)) {
1152                                 font = &dc.ibfont;
1153                                 frcflags = FRC_ITALICBOLD;
1154                         } else if (mode & ATTR_ITALIC) {
1155                                 font = &dc.ifont;
1156                                 frcflags = FRC_ITALIC;
1157                         } else if (mode & ATTR_BOLD) {
1158                                 font = &dc.bfont;
1159                                 frcflags = FRC_BOLD;
1160                         }
1161                         yp = winy + font->ascent;
1162                 }
1163
1164                 /* Lookup character index with default font. */
1165                 glyphidx = XftCharIndex(xw.dpy, font->match, rune);
1166                 if (glyphidx) {
1167                         specs[numspecs].font = font->match;
1168                         specs[numspecs].glyph = glyphidx;
1169                         specs[numspecs].x = (short)xp;
1170                         specs[numspecs].y = (short)yp;
1171                         xp += runewidth;
1172                         numspecs++;
1173                         continue;
1174                 }
1175
1176                 /* Fallback on font cache, search the font cache for match. */
1177                 for (f = 0; f < frclen; f++) {
1178                         glyphidx = XftCharIndex(xw.dpy, frc[f].font, rune);
1179                         /* Everything correct. */
1180                         if (glyphidx && frc[f].flags == frcflags)
1181                                 break;
1182                         /* We got a default font for a not found glyph. */
1183                         if (!glyphidx && frc[f].flags == frcflags
1184                                         && frc[f].unicodep == rune) {
1185                                 break;
1186                         }
1187                 }
1188
1189                 /* Nothing was found. Use fontconfig to find matching font. */
1190                 if (f >= frclen) {
1191                         if (!font->set)
1192                                 font->set = FcFontSort(0, font->pattern,
1193                                                        1, 0, &fcres);
1194                         fcsets[0] = font->set;
1195
1196                         /*
1197                          * Nothing was found in the cache. Now use
1198                          * some dozen of Fontconfig calls to get the
1199                          * font for one single character.
1200                          *
1201                          * Xft and fontconfig are design failures.
1202                          */
1203                         fcpattern = FcPatternDuplicate(font->pattern);
1204                         fccharset = FcCharSetCreate();
1205
1206                         FcCharSetAddChar(fccharset, rune);
1207                         FcPatternAddCharSet(fcpattern, FC_CHARSET,
1208                                         fccharset);
1209                         FcPatternAddBool(fcpattern, FC_SCALABLE, 1);
1210
1211                         FcConfigSubstitute(0, fcpattern,
1212                                         FcMatchPattern);
1213                         FcDefaultSubstitute(fcpattern);
1214
1215                         fontpattern = FcFontSetMatch(0, fcsets, 1,
1216                                         fcpattern, &fcres);
1217
1218                         /*
1219                          * Overwrite or create the new cache entry.
1220                          */
1221                         if (frclen >= LEN(frc)) {
1222                                 frclen = LEN(frc) - 1;
1223                                 XftFontClose(xw.dpy, frc[frclen].font);
1224                                 frc[frclen].unicodep = 0;
1225                         }
1226
1227                         frc[frclen].font = XftFontOpenPattern(xw.dpy,
1228                                         fontpattern);
1229                         if (!frc[frclen].font)
1230                                 die("XftFontOpenPattern failed seeking fallback font: %s\n",
1231                                         strerror(errno));
1232                         frc[frclen].flags = frcflags;
1233                         frc[frclen].unicodep = rune;
1234
1235                         glyphidx = XftCharIndex(xw.dpy, frc[frclen].font, rune);
1236
1237                         f = frclen;
1238                         frclen++;
1239
1240                         FcPatternDestroy(fcpattern);
1241                         FcCharSetDestroy(fccharset);
1242                 }
1243
1244                 specs[numspecs].font = frc[f].font;
1245                 specs[numspecs].glyph = glyphidx;
1246                 specs[numspecs].x = (short)xp;
1247                 specs[numspecs].y = (short)yp;
1248                 xp += runewidth;
1249                 numspecs++;
1250         }
1251
1252         return numspecs;
1253 }
1254
1255 void
1256 xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, int y)
1257 {
1258         int charlen = len * ((base.mode & ATTR_WIDE) ? 2 : 1);
1259         int winx = borderpx + x * win.cw, winy = borderpx + y * win.ch,
1260             width = charlen * win.cw;
1261         Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
1262         XRenderColor colfg, colbg;
1263         XRectangle r;
1264
1265         /* Fallback on color display for attributes not supported by the font */
1266         if (base.mode & ATTR_ITALIC && base.mode & ATTR_BOLD) {
1267                 if (dc.ibfont.badslant || dc.ibfont.badweight)
1268                         base.fg = defaultattr;
1269         } else if ((base.mode & ATTR_ITALIC && dc.ifont.badslant) ||
1270             (base.mode & ATTR_BOLD && dc.bfont.badweight)) {
1271                 base.fg = defaultattr;
1272         }
1273
1274         if (IS_TRUECOL(base.fg)) {
1275                 colfg.alpha = 0xffff;
1276                 colfg.red = TRUERED(base.fg);
1277                 colfg.green = TRUEGREEN(base.fg);
1278                 colfg.blue = TRUEBLUE(base.fg);
1279                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
1280                 fg = &truefg;
1281         } else {
1282                 fg = &dc.col[base.fg];
1283         }
1284
1285         if (IS_TRUECOL(base.bg)) {
1286                 colbg.alpha = 0xffff;
1287                 colbg.green = TRUEGREEN(base.bg);
1288                 colbg.red = TRUERED(base.bg);
1289                 colbg.blue = TRUEBLUE(base.bg);
1290                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
1291                 bg = &truebg;
1292         } else {
1293                 bg = &dc.col[base.bg];
1294         }
1295
1296         /* Change basic system colors [0-7] to bright system colors [8-15] */
1297         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_BOLD && BETWEEN(base.fg, 0, 7))
1298                 fg = &dc.col[base.fg + 8];
1299
1300         if (IS_SET(MODE_REVERSE)) {
1301                 if (fg == &dc.col[defaultfg]) {
1302                         fg = &dc.col[defaultbg];
1303                 } else {
1304                         colfg.red = ~fg->color.red;
1305                         colfg.green = ~fg->color.green;
1306                         colfg.blue = ~fg->color.blue;
1307                         colfg.alpha = fg->color.alpha;
1308                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
1309                                         &revfg);
1310                         fg = &revfg;
1311                 }
1312
1313                 if (bg == &dc.col[defaultbg]) {
1314                         bg = &dc.col[defaultfg];
1315                 } else {
1316                         colbg.red = ~bg->color.red;
1317                         colbg.green = ~bg->color.green;
1318                         colbg.blue = ~bg->color.blue;
1319                         colbg.alpha = bg->color.alpha;
1320                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
1321                                         &revbg);
1322                         bg = &revbg;
1323                 }
1324         }
1325
1326         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_FAINT) {
1327                 colfg.red = fg->color.red / 2;
1328                 colfg.green = fg->color.green / 2;
1329                 colfg.blue = fg->color.blue / 2;
1330                 colfg.alpha = fg->color.alpha;
1331                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
1332                 fg = &revfg;
1333         }
1334
1335         if (base.mode & ATTR_REVERSE) {
1336                 temp = fg;
1337                 fg = bg;
1338                 bg = temp;
1339         }
1340
1341         if (base.mode & ATTR_BLINK && win.mode & MODE_BLINK)
1342                 fg = bg;
1343
1344         if (base.mode & ATTR_INVISIBLE)
1345                 fg = bg;
1346
1347         /* Intelligent cleaning up of the borders. */
1348         if (x == 0) {
1349                 xclear(0, (y == 0)? 0 : winy, borderpx,
1350                         winy + win.ch +
1351                         ((winy + win.ch >= borderpx + win.th)? win.h : 0));
1352         }
1353         if (winx + width >= borderpx + win.tw) {
1354                 xclear(winx + width, (y == 0)? 0 : winy, win.w,
1355                         ((winy + win.ch >= borderpx + win.th)? win.h : (winy + win.ch)));
1356         }
1357         if (y == 0)
1358                 xclear(winx, 0, winx + width, borderpx);
1359         if (winy + win.ch >= borderpx + win.th)
1360                 xclear(winx, winy + win.ch, winx + width, win.h);
1361
1362         /* Clean up the region we want to draw to. */
1363         XftDrawRect(xw.draw, bg, winx, winy, width, win.ch);
1364
1365         /* Set the clip region because Xft is sometimes dirty. */
1366         r.x = 0;
1367         r.y = 0;
1368         r.height = win.ch;
1369         r.width = width;
1370         XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
1371
1372         /* Render the glyphs. */
1373         XftDrawGlyphFontSpec(xw.draw, fg, specs, len);
1374
1375         /* Render underline and strikethrough. */
1376         if (base.mode & ATTR_UNDERLINE) {
1377                 XftDrawRect(xw.draw, fg, winx, winy + dc.font.ascent + 1,
1378                                 width, 1);
1379         }
1380
1381         if (base.mode & ATTR_STRUCK) {
1382                 XftDrawRect(xw.draw, fg, winx, winy + 2 * dc.font.ascent / 3,
1383                                 width, 1);
1384         }
1385
1386         /* Reset clip to none. */
1387         XftDrawSetClip(xw.draw, 0);
1388 }
1389
1390 void
1391 xdrawglyph(Glyph g, int x, int y)
1392 {
1393         int numspecs;
1394         XftGlyphFontSpec spec;
1395
1396         numspecs = xmakeglyphfontspecs(&spec, &g, 1, x, y);
1397         xdrawglyphfontspecs(&spec, g, numspecs, x, y);
1398 }
1399
1400 void
1401 xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og)
1402 {
1403         Color drawcol;
1404
1405         /* remove the old cursor */
1406         if (selected(ox, oy))
1407                 og.mode ^= ATTR_REVERSE;
1408         xdrawglyph(og, ox, oy);
1409
1410         if (IS_SET(MODE_HIDE))
1411                 return;
1412
1413         /*
1414          * Select the right color for the right mode.
1415          */
1416         g.mode &= ATTR_BOLD|ATTR_ITALIC|ATTR_UNDERLINE|ATTR_STRUCK|ATTR_WIDE;
1417
1418         if (IS_SET(MODE_REVERSE)) {
1419                 g.mode |= ATTR_REVERSE;
1420                 g.bg = defaultfg;
1421                 if (selected(cx, cy)) {
1422                         drawcol = dc.col[defaultcs];
1423                         g.fg = defaultrcs;
1424                 } else {
1425                         drawcol = dc.col[defaultrcs];
1426                         g.fg = defaultcs;
1427                 }
1428         } else {
1429                 if (selected(cx, cy)) {
1430                         g.fg = defaultfg;
1431                         g.bg = defaultrcs;
1432                 } else {
1433                         g.fg = defaultbg;
1434                         g.bg = defaultcs;
1435                 }
1436                 drawcol = dc.col[g.bg];
1437         }
1438
1439         /* draw the new one */
1440         if (IS_SET(MODE_FOCUSED)) {
1441                 switch (win.cursor) {
1442                 case 7: /* st extension: snowman (U+2603) */
1443                         g.u = 0x2603;
1444                 case 0: /* Blinking Block */
1445                 case 1: /* Blinking Block (Default) */
1446                 case 2: /* Steady Block */
1447                         xdrawglyph(g, cx, cy);
1448                         break;
1449                 case 3: /* Blinking Underline */
1450                 case 4: /* Steady Underline */
1451                         XftDrawRect(xw.draw, &drawcol,
1452                                         borderpx + cx * win.cw,
1453                                         borderpx + (cy + 1) * win.ch - \
1454                                                 cursorthickness,
1455                                         win.cw, cursorthickness);
1456                         break;
1457                 case 5: /* Blinking bar */
1458                 case 6: /* Steady bar */
1459                         XftDrawRect(xw.draw, &drawcol,
1460                                         borderpx + cx * win.cw,
1461                                         borderpx + cy * win.ch,
1462                                         cursorthickness, win.ch);
1463                         break;
1464                 }
1465         } else {
1466                 XftDrawRect(xw.draw, &drawcol,
1467                                 borderpx + cx * win.cw,
1468                                 borderpx + cy * win.ch,
1469                                 win.cw - 1, 1);
1470                 XftDrawRect(xw.draw, &drawcol,
1471                                 borderpx + cx * win.cw,
1472                                 borderpx + cy * win.ch,
1473                                 1, win.ch - 1);
1474                 XftDrawRect(xw.draw, &drawcol,
1475                                 borderpx + (cx + 1) * win.cw - 1,
1476                                 borderpx + cy * win.ch,
1477                                 1, win.ch - 1);
1478                 XftDrawRect(xw.draw, &drawcol,
1479                                 borderpx + cx * win.cw,
1480                                 borderpx + (cy + 1) * win.ch - 1,
1481                                 win.cw, 1);
1482         }
1483 }
1484
1485 void
1486 xsetenv(void)
1487 {
1488         char buf[sizeof(long) * 8 + 1];
1489
1490         snprintf(buf, sizeof(buf), "%lu", xw.win);
1491         setenv("WINDOWID", buf, 1);
1492 }
1493
1494 void
1495 xsettitle(char *p)
1496 {
1497         XTextProperty prop;
1498         DEFAULT(p, opt_title);
1499
1500         Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
1501                         &prop);
1502         XSetWMName(xw.dpy, xw.win, &prop);
1503         XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
1504         XFree(prop.value);
1505 }
1506
1507 int
1508 xstartdraw(void)
1509 {
1510         return IS_SET(MODE_VISIBLE);
1511 }
1512
1513 void
1514 xdrawline(Line line, int x1, int y1, int x2)
1515 {
1516         int i, x, ox, numspecs;
1517         Glyph base, new;
1518         XftGlyphFontSpec *specs = xw.specbuf;
1519
1520         numspecs = xmakeglyphfontspecs(specs, &line[x1], x2 - x1, x1, y1);
1521         i = ox = 0;
1522         for (x = x1; x < x2 && i < numspecs; x++) {
1523                 new = line[x];
1524                 if (new.mode == ATTR_WDUMMY)
1525                         continue;
1526                 if (selected(x, y1))
1527                         new.mode ^= ATTR_REVERSE;
1528                 if (i > 0 && ATTRCMP(base, new)) {
1529                         xdrawglyphfontspecs(specs, base, i, ox, y1);
1530                         specs += i;
1531                         numspecs -= i;
1532                         i = 0;
1533                 }
1534                 if (i == 0) {
1535                         ox = x;
1536                         base = new;
1537                 }
1538                 i++;
1539         }
1540         if (i > 0)
1541                 xdrawglyphfontspecs(specs, base, i, ox, y1);
1542 }
1543
1544 void
1545 xfinishdraw(void)
1546 {
1547         XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, win.w,
1548                         win.h, 0, 0);
1549         XSetForeground(xw.dpy, dc.gc,
1550                         dc.col[IS_SET(MODE_REVERSE)?
1551                                 defaultfg : defaultbg].pixel);
1552 }
1553
1554 void
1555 expose(XEvent *ev)
1556 {
1557         redraw();
1558 }
1559
1560 void
1561 visibility(XEvent *ev)
1562 {
1563         XVisibilityEvent *e = &ev->xvisibility;
1564
1565         MODBIT(win.mode, e->state != VisibilityFullyObscured, MODE_VISIBLE);
1566 }
1567
1568 void
1569 unmap(XEvent *ev)
1570 {
1571         win.mode &= ~MODE_VISIBLE;
1572 }
1573
1574 void
1575 xsetpointermotion(int set)
1576 {
1577         MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
1578         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
1579 }
1580
1581 void
1582 xsetmode(int set, unsigned int flags)
1583 {
1584         int mode = win.mode;
1585         MODBIT(win.mode, set, flags);
1586         if ((win.mode & MODE_REVERSE) != (mode & MODE_REVERSE))
1587                 redraw();
1588 }
1589
1590 int
1591 xsetcursor(int cursor)
1592 {
1593         DEFAULT(cursor, 1);
1594         if (!BETWEEN(cursor, 0, 6))
1595                 return 1;
1596         win.cursor = cursor;
1597         return 0;
1598 }
1599
1600 void
1601 xseturgency(int add)
1602 {
1603         XWMHints *h = XGetWMHints(xw.dpy, xw.win);
1604
1605         MODBIT(h->flags, add, XUrgencyHint);
1606         XSetWMHints(xw.dpy, xw.win, h);
1607         XFree(h);
1608 }
1609
1610 void
1611 xbell(void)
1612 {
1613         if (!(IS_SET(MODE_FOCUSED)))
1614                 xseturgency(1);
1615         if (bellvolume)
1616                 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
1617 }
1618
1619 void
1620 focus(XEvent *ev)
1621 {
1622         XFocusChangeEvent *e = &ev->xfocus;
1623
1624         if (e->mode == NotifyGrab)
1625                 return;
1626
1627         if (ev->type == FocusIn) {
1628                 XSetICFocus(xw.xic);
1629                 win.mode |= MODE_FOCUSED;
1630                 xseturgency(0);
1631                 if (IS_SET(MODE_FOCUS))
1632                         ttywrite("\033[I", 3, 0);
1633         } else {
1634                 XUnsetICFocus(xw.xic);
1635                 win.mode &= ~MODE_FOCUSED;
1636                 if (IS_SET(MODE_FOCUS))
1637                         ttywrite("\033[O", 3, 0);
1638         }
1639 }
1640
1641 int
1642 match(uint mask, uint state)
1643 {
1644         return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
1645 }
1646
1647 char*
1648 kmap(KeySym k, uint state)
1649 {
1650         Key *kp;
1651         int i;
1652
1653         /* Check for mapped keys out of X11 function keys. */
1654         for (i = 0; i < LEN(mappedkeys); i++) {
1655                 if (mappedkeys[i] == k)
1656                         break;
1657         }
1658         if (i == LEN(mappedkeys)) {
1659                 if ((k & 0xFFFF) < 0xFD00)
1660                         return NULL;
1661         }
1662
1663         for (kp = key; kp < key + LEN(key); kp++) {
1664                 if (kp->k != k)
1665                         continue;
1666
1667                 if (!match(kp->mask, state))
1668                         continue;
1669
1670                 if (IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
1671                         continue;
1672                 if (IS_SET(MODE_NUMLOCK) && kp->appkey == 2)
1673                         continue;
1674
1675                 if (IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
1676                         continue;
1677
1678                 return kp->s;
1679         }
1680
1681         return NULL;
1682 }
1683
1684 void
1685 kpress(XEvent *ev)
1686 {
1687         XKeyEvent *e = &ev->xkey;
1688         KeySym ksym;
1689         char buf[32], *customkey;
1690         int len;
1691         Rune c;
1692         Status status;
1693         Shortcut *bp;
1694
1695         if (IS_SET(MODE_KBDLOCK))
1696                 return;
1697
1698         len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
1699         /* 1. shortcuts */
1700         for (bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
1701                 if (ksym == bp->keysym && match(bp->mod, e->state)) {
1702                         bp->func(&(bp->arg));
1703                         return;
1704                 }
1705         }
1706
1707         /* 2. custom keys from config.h */
1708         if ((customkey = kmap(ksym, e->state))) {
1709                 ttywrite(customkey, strlen(customkey), 1);
1710                 return;
1711         }
1712
1713         /* 3. composed string from input method */
1714         if (len == 0)
1715                 return;
1716         if (len == 1 && e->state & Mod1Mask) {
1717                 if (IS_SET(MODE_8BIT)) {
1718                         if (*buf < 0177) {
1719                                 c = *buf | 0x80;
1720                                 len = utf8encode(c, buf);
1721                         }
1722                 } else {
1723                         buf[1] = buf[0];
1724                         buf[0] = '\033';
1725                         len = 2;
1726                 }
1727         }
1728         ttywrite(buf, len, 1);
1729 }
1730
1731
1732 void
1733 cmessage(XEvent *e)
1734 {
1735         /*
1736          * See xembed specs
1737          *  http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
1738          */
1739         if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
1740                 if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
1741                         win.mode |= MODE_FOCUSED;
1742                         xseturgency(0);
1743                 } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
1744                         win.mode &= ~MODE_FOCUSED;
1745                 }
1746         } else if (e->xclient.data.l[0] == xw.wmdeletewin) {
1747                 ttyhangup();
1748                 exit(0);
1749         }
1750 }
1751
1752 void
1753 resize(XEvent *e)
1754 {
1755         if (e->xconfigure.width == win.w && e->xconfigure.height == win.h)
1756                 return;
1757
1758         cresize(e->xconfigure.width, e->xconfigure.height);
1759 }
1760
1761 void
1762 run(void)
1763 {
1764         XEvent ev;
1765         int w = win.w, h = win.h;
1766         fd_set rfd;
1767         int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
1768         int ttyfd;
1769         struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
1770         long deltatime;
1771
1772         /* Waiting for window mapping */
1773         do {
1774                 XNextEvent(xw.dpy, &ev);
1775                 /*
1776                  * This XFilterEvent call is required because of XOpenIM. It
1777                  * does filter out the key event and some client message for
1778                  * the input method too.
1779                  */
1780                 if (XFilterEvent(&ev, None))
1781                         continue;
1782                 if (ev.type == ConfigureNotify) {
1783                         w = ev.xconfigure.width;
1784                         h = ev.xconfigure.height;
1785                 }
1786         } while (ev.type != MapNotify);
1787
1788         ttyfd = ttynew(opt_line, shell, opt_io, opt_cmd);
1789         cresize(w, h);
1790
1791         clock_gettime(CLOCK_MONOTONIC, &last);
1792         lastblink = last;
1793
1794         for (xev = actionfps;;) {
1795                 FD_ZERO(&rfd);
1796                 FD_SET(ttyfd, &rfd);
1797                 FD_SET(xfd, &rfd);
1798
1799                 if (pselect(MAX(xfd, ttyfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
1800                         if (errno == EINTR)
1801                                 continue;
1802                         die("select failed: %s\n", strerror(errno));
1803                 }
1804                 if (FD_ISSET(ttyfd, &rfd)) {
1805                         ttyread();
1806                         if (blinktimeout) {
1807                                 blinkset = tattrset(ATTR_BLINK);
1808                                 if (!blinkset)
1809                                         MODBIT(win.mode, 0, MODE_BLINK);
1810                         }
1811                 }
1812
1813                 if (FD_ISSET(xfd, &rfd))
1814                         xev = actionfps;
1815
1816                 clock_gettime(CLOCK_MONOTONIC, &now);
1817                 drawtimeout.tv_sec = 0;
1818                 drawtimeout.tv_nsec =  (1000 * 1E6)/ xfps;
1819                 tv = &drawtimeout;
1820
1821                 dodraw = 0;
1822                 if (blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
1823                         tsetdirtattr(ATTR_BLINK);
1824                         win.mode ^= MODE_BLINK;
1825                         lastblink = now;
1826                         dodraw = 1;
1827                 }
1828                 deltatime = TIMEDIFF(now, last);
1829                 if (deltatime > 1000 / (xev ? xfps : actionfps)) {
1830                         dodraw = 1;
1831                         last = now;
1832                 }
1833
1834                 if (dodraw) {
1835                         while (XPending(xw.dpy)) {
1836                                 XNextEvent(xw.dpy, &ev);
1837                                 if (XFilterEvent(&ev, None))
1838                                         continue;
1839                                 if (handler[ev.type])
1840                                         (handler[ev.type])(&ev);
1841                         }
1842
1843                         draw();
1844                         XFlush(xw.dpy);
1845
1846                         if (xev && !FD_ISSET(xfd, &rfd))
1847                                 xev--;
1848                         if (!FD_ISSET(ttyfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
1849                                 if (blinkset) {
1850                                         if (TIMEDIFF(now, lastblink) \
1851                                                         > blinktimeout) {
1852                                                 drawtimeout.tv_nsec = 1000;
1853                                         } else {
1854                                                 drawtimeout.tv_nsec = (1E6 * \
1855                                                         (blinktimeout - \
1856                                                         TIMEDIFF(now,
1857                                                                 lastblink)));
1858                                         }
1859                                         drawtimeout.tv_sec = \
1860                                             drawtimeout.tv_nsec / 1E9;
1861                                         drawtimeout.tv_nsec %= (long)1E9;
1862                                 } else {
1863                                         tv = NULL;
1864                                 }
1865                         }
1866                 }
1867         }
1868 }
1869
1870 void
1871 usage(void)
1872 {
1873         die("usage: %s [-aiv] [-c class] [-f font] [-g geometry]"
1874             " [-n name] [-o file]\n"
1875             "          [-T title] [-t title] [-w windowid]"
1876             " [[-e] command [args ...]]\n"
1877             "       %s [-aiv] [-c class] [-f font] [-g geometry]"
1878             " [-n name] [-o file]\n"
1879             "          [-T title] [-t title] [-w windowid] -l line"
1880             " [stty_args ...]\n", argv0, argv0);
1881 }
1882
1883 int
1884 main(int argc, char *argv[])
1885 {
1886         xw.l = xw.t = 0;
1887         xw.isfixed = False;
1888         win.cursor = cursorshape;
1889
1890         ARGBEGIN {
1891         case 'a':
1892                 allowaltscreen = 0;
1893                 break;
1894         case 'c':
1895                 opt_class = EARGF(usage());
1896                 break;
1897         case 'e':
1898                 if (argc > 0)
1899                         --argc, ++argv;
1900                 goto run;
1901         case 'f':
1902                 opt_font = EARGF(usage());
1903                 break;
1904         case 'g':
1905                 xw.gm = XParseGeometry(EARGF(usage()),
1906                                 &xw.l, &xw.t, &cols, &rows);
1907                 break;
1908         case 'i':
1909                 xw.isfixed = 1;
1910                 break;
1911         case 'o':
1912                 opt_io = EARGF(usage());
1913                 break;
1914         case 'l':
1915                 opt_line = EARGF(usage());
1916                 break;
1917         case 'n':
1918                 opt_name = EARGF(usage());
1919                 break;
1920         case 't':
1921         case 'T':
1922                 opt_title = EARGF(usage());
1923                 break;
1924         case 'w':
1925                 opt_embed = EARGF(usage());
1926                 break;
1927         case 'v':
1928                 die("%s " VERSION " (c) 2010-2016 st engineers\n", argv0);
1929                 break;
1930         default:
1931                 usage();
1932         } ARGEND;
1933
1934 run:
1935         if (argc > 0) /* eat all remaining arguments */
1936                 opt_cmd = argv;
1937
1938         if (!opt_title)
1939                 opt_title = (opt_line || !opt_cmd) ? "st" : opt_cmd[0];
1940
1941         setlocale(LC_CTYPE, "");
1942         XSetLocaleModifiers("");
1943         cols = MAX(cols, 1);
1944         rows = MAX(rows, 1);
1945         tnew(cols, rows);
1946         xinit(cols, rows);
1947         xsetenv();
1948         selinit();
1949         run();
1950
1951         return 0;
1952 }