x.c

   1 /* See LICENSE for license details. */
   2 #include <errno.h>
   3 #include <locale.h>
   4 #include <signal.h>
   5 #include <stdint.h>
   6 #include <sys/select.h>
   7 #include <time.h>
   8 #include <unistd.h>
   9 #include <libgen.h>
  10 #include <X11/Xatom.h>
  11 #include <X11/Xlib.h>
  12 #include <X11/Xutil.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         Display *dpy;
  80         Colormap cmap;
  81         Window win;
  82         Drawable buf;
  83         GlyphFontSpec *specbuf; /* font spec buffer used for rendering */
  84         Atom xembed, wmdeletewin, netwmname, netwmpid;
  85         XIM xim;
  86         XIC xic;
  87         Draw draw;
  88         Visual *vis;
  89         XSetWindowAttributes attrs;
  90         int scr;
  91         int isfixed; /* is fixed geometry? */
  92         int l, t; /* left and top offset */
  93         int gm; /* geometry mask */
  94 } XWindow;
  95
  96 typedef struct {
  97         Atom xtarget;
  98         char *primary, *clipboard;
  99         struct timespec tclick1;
 100         struct timespec tclick2;
 101 } XSelection;
 102
 103 /* Font structure */
 104 #define Font Font_
 105 typedef struct {
 106         int height;
 107         int width;
 108         int ascent;
 109         int descent;
 110         int badslant;
 111         int badweight;
 112         short lbearing;
 113         short rbearing;
 114         XftFont *match;
 115         FcFontSet *set;
 116         FcPattern *pattern;
 117 } Font;
 118
 119 /* Drawing Context */
 120 typedef struct {
 121         Color *col;
 122         size_t collen;
 123         Font font, bfont, ifont, ibfont;
 124         GC gc;
 125 } DC;
 126
 127 static inline ushort sixd_to_16bit(int);
 128 static int xmakeglyphfontspecs(XftGlyphFontSpec *, const Glyph *, int, int, int);
 129 static void xdrawglyphfontspecs(const XftGlyphFontSpec *, Glyph, int, int, int);
 130 static void xdrawglyph(Glyph, int, int);
 131 static void xclear(int, int, int, int);
 132 static int xgeommasktogravity(int);
 133 static void xinit(void);
 134 static void cresize(int, int);
 135 static void xresize(int, int);
 136 static int xloadfont(Font *, FcPattern *);
 137 static void xloadfonts(char *, double);
 138 static void xunloadfont(Font *);
 139 static void xunloadfonts(void);
 140 static void xsetenv(void);
 141 static void xseturgency(int);
 142 static int x2col(int);
 143 static int y2row(int);
 144
 145 static void expose(XEvent *);
 146 static void visibility(XEvent *);
 147 static void unmap(XEvent *);
 148 static void kpress(XEvent *);
 149 static void cmessage(XEvent *);
 150 static void resize(XEvent *);
 151 static void focus(XEvent *);
 152 static void brelease(XEvent *);
 153 static void bpress(XEvent *);
 154 static void bmotion(XEvent *);
 155 static void propnotify(XEvent *);
 156 static void selnotify(XEvent *);
 157 static void selclear_(XEvent *);
 158 static void selrequest(XEvent *);
 159 static void setsel(char *, Time);
 160 static void mousesel(XEvent *, int);
 161 static void mousereport(XEvent *);
 162 static char *kmap(KeySym, uint);
 163 static int match(uint, uint);
 164
 165 static void run(void);
 166 static void usage(void);
 167
 168 static void (*handler[LASTEvent])(XEvent *) = {
 169         [KeyPress] = kpress,
 170         [ClientMessage] = cmessage,
 171         [ConfigureNotify] = resize,
 172         [VisibilityNotify] = visibility,
 173         [UnmapNotify] = unmap,
 174         [Expose] = expose,
 175         [FocusIn] = focus,
 176         [FocusOut] = focus,
 177         [MotionNotify] = bmotion,
 178         [ButtonPress] = bpress,
 179         [ButtonRelease] = brelease,
 180 /*
 181  * Uncomment if you want the selection to disappear when you select something
 182  * different in another window.
 183  */
 184 /*      [SelectionClear] = selclear_, */
 185         [SelectionNotify] = selnotify,
 186 /*
 187  * PropertyNotify is only turned on when there is some INCR transfer happening
 188  * for the selection retrieval.
 189  */
 190         [PropertyNotify] = propnotify,
 191         [SelectionRequest] = selrequest,
 192 };
 193
 194 /* Globals */
 195 static DC dc;
 196 static XWindow xw;
 197 static XSelection xsel;
 198 static TermWindow win;
 199
 200 /* Font Ring Cache */
 201 enum {
 202         FRC_NORMAL,
 203         FRC_ITALIC,
 204         FRC_BOLD,
 205         FRC_ITALICBOLD
 206 };
 207
 208 typedef struct {
 209         XftFont *font;
 210         int flags;
 211         Rune unicodep;
 212 } Fontcache;
 213
 214 /* Fontcache is an array now. A new font will be appended to the array. */
 215 static Fontcache frc[16];
 216 static int frclen = 0;
 217 static char *usedfont = NULL;
 218 static double usedfontsize = 0;
 219 static double defaultfontsize = 0;
 220
 221 static char *opt_class = NULL;
 222 static char **opt_cmd  = NULL;
 223 static char *opt_embed = NULL;
 224 static char *opt_font  = NULL;
 225 static char *opt_io    = NULL;
 226 static char *opt_line  = NULL;
 227 static char *opt_name  = NULL;
 228 static char *opt_title = NULL;
 229
 230 void
 231 clipcopy(const Arg *dummy)
 232 {
 233         Atom clipboard;
 234
 235         if (xsel.clipboard != NULL)
 236                 free(xsel.clipboard);
 237
 238         if (xsel.primary != NULL) {
 239                 xsel.clipboard = xstrdup(xsel.primary);
 240                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 241                 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
 242         }
 243 }
 244
 245 void
 246 clippaste(const Arg *dummy)
 247 {
 248         Atom clipboard;
 249
 250         clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 251         XConvertSelection(xw.dpy, clipboard, xsel.xtarget, clipboard,
 252                         xw.win, CurrentTime);
 253 }
 254
 255 void
 256 selpaste(const Arg *dummy)
 257 {
 258         XConvertSelection(xw.dpy, XA_PRIMARY, xsel.xtarget, XA_PRIMARY,
 259                         xw.win, CurrentTime);
 260 }
 261
 262 void
 263 numlock(const Arg *dummy)
 264 {
 265         win.mode ^= MODE_NUMLOCK;
 266 }
 267
 268 void
 269 zoom(const Arg *arg)
 270 {
 271         Arg larg;
 272
 273         larg.f = usedfontsize + arg->f;
 274         zoomabs(&larg);
 275 }
 276
 277 void
 278 zoomabs(const Arg *arg)
 279 {
 280         xunloadfonts();
 281         xloadfonts(usedfont, arg->f);
 282         cresize(0, 0);
 283         redraw();
 284         xhints();
 285 }
 286
 287 void
 288 zoomreset(const Arg *arg)
 289 {
 290         Arg larg;
 291
 292         if (defaultfontsize > 0) {
 293                 larg.f = defaultfontsize;
 294                 zoomabs(&larg);
 295         }
 296 }
 297
 298 int
 299 x2col(int x)
 300 {
 301         x -= borderpx;
 302         x /= win.cw;
 303
 304         return LIMIT(x, 0, term.col-1);
 305 }
 306
 307 int
 308 y2row(int y)
 309 {
 310         y -= borderpx;
 311         y /= win.ch;
 312
 313         return LIMIT(y, 0, term.row-1);
 314 }
 315
 316 void
 317 mousesel(XEvent *e, int done)
 318 {
 319         int type, seltype = SEL_REGULAR;
 320         uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
 321
 322         for (type = 1; type < LEN(selmasks); ++type) {
 323                 if (match(selmasks[type], state)) {
 324                         seltype = type;
 325                         break;
 326                 }
 327         }
 328         selextend(x2col(e->xbutton.x), y2row(e->xbutton.y), seltype, done);
 329         if (done)
 330                 setsel(getsel(), e->xbutton.time);
 331 }
 332
 333 void
 334 mousereport(XEvent *e)
 335 {
 336         int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
 337             button = e->xbutton.button, state = e->xbutton.state,
 338             len;
 339         char buf[40];
 340         static int ox, oy;
 341
 342         /* from urxvt */
 343         if (e->xbutton.type == MotionNotify) {
 344                 if (x == ox && y == oy)
 345                         return;
 346                 if (!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
 347                         return;
 348                 /* MOUSE_MOTION: no reporting if no button is pressed */
 349                 if (IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
 350                         return;
 351
 352                 button = oldbutton + 32;
 353                 ox = x;
 354                 oy = y;
 355         } else {
 356                 if (!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
 357                         button = 3;
 358                 } else {
 359                         button -= Button1;
 360                         if (button >= 3)
 361                                 button += 64 - 3;
 362                 }
 363                 if (e->xbutton.type == ButtonPress) {
 364                         oldbutton = button;
 365                         ox = x;
 366                         oy = y;
 367                 } else if (e->xbutton.type == ButtonRelease) {
 368                         oldbutton = 3;
 369                         /* MODE_MOUSEX10: no button release reporting */
 370                         if (IS_SET(MODE_MOUSEX10))
 371                                 return;
 372                         if (button == 64 || button == 65)
 373                                 return;
 374                 }
 375         }
 376
 377         if (!IS_SET(MODE_MOUSEX10)) {
 378                 button += ((state & ShiftMask  ) ? 4  : 0)
 379                         + ((state & Mod4Mask   ) ? 8  : 0)
 380                         + ((state & ControlMask) ? 16 : 0);
 381         }
 382
 383         if (IS_SET(MODE_MOUSESGR)) {
 384                 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
 385                                 button, x+1, y+1,
 386                                 e->xbutton.type == ButtonRelease ? 'm' : 'M');
 387         } else if (x < 223 && y < 223) {
 388                 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
 389                                 32+button, 32+x+1, 32+y+1);
 390         } else {
 391                 return;
 392         }
 393
 394         ttywrite(buf, len, 0);
 395 }
 396
 397 void
 398 bpress(XEvent *e)
 399 {
 400         struct timespec now;
 401         MouseShortcut *ms;
 402         int snap;
 403
 404         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 405                 mousereport(e);
 406                 return;
 407         }
 408
 409         for (ms = mshortcuts; ms < mshortcuts + LEN(mshortcuts); ms++) {
 410                 if (e->xbutton.button == ms->b
 411                                 && match(ms->mask, e->xbutton.state)) {
 412                         ttywrite(ms->s, strlen(ms->s), 1);
 413                         return;
 414                 }
 415         }
 416
 417         if (e->xbutton.button == Button1) {
 418                 /*
 419                  * If the user clicks below predefined timeouts specific
 420                  * snapping behaviour is exposed.
 421                  */
 422                 clock_gettime(CLOCK_MONOTONIC, &now);
 423                 if (TIMEDIFF(now, xsel.tclick2) <= tripleclicktimeout) {
 424                         snap = SNAP_LINE;
 425                 } else if (TIMEDIFF(now, xsel.tclick1) <= doubleclicktimeout) {
 426                         snap = SNAP_WORD;
 427                 } else {
 428                         snap = 0;
 429                 }
 430                 xsel.tclick2 = xsel.tclick1;
 431                 xsel.tclick1 = now;
 432
 433                 selstart(x2col(e->xbutton.x), y2row(e->xbutton.y), snap);
 434         }
 435 }
 436
 437 void
 438 propnotify(XEvent *e)
 439 {
 440         XPropertyEvent *xpev;
 441         Atom clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 442
 443         xpev = &e->xproperty;
 444         if (xpev->state == PropertyNewValue &&
 445                         (xpev->atom == XA_PRIMARY ||
 446                          xpev->atom == clipboard)) {
 447                 selnotify(e);
 448         }
 449 }
 450
 451 void
 452 selnotify(XEvent *e)
 453 {
 454         ulong nitems, ofs, rem;
 455         int format;
 456         uchar *data, *last, *repl;
 457         Atom type, incratom, property;
 458
 459         incratom = XInternAtom(xw.dpy, "INCR", 0);
 460
 461         ofs = 0;
 462         if (e->type == SelectionNotify) {
 463                 property = e->xselection.property;
 464         } else if(e->type == PropertyNotify) {
 465                 property = e->xproperty.atom;
 466         } else {
 467                 return;
 468         }
 469         if (property == None)
 470                 return;
 471
 472         do {
 473                 if (XGetWindowProperty(xw.dpy, xw.win, property, ofs,
 474                                         BUFSIZ/4, False, AnyPropertyType,
 475                                         &type, &format, &nitems, &rem,
 476                                         &data)) {
 477                         fprintf(stderr, "Clipboard allocation failed\n");
 478                         return;
 479                 }
 480
 481                 if (e->type == PropertyNotify && nitems == 0 && rem == 0) {
 482                         /*
 483                          * If there is some PropertyNotify with no data, then
 484                          * this is the signal of the selection owner that all
 485                          * data has been transferred. We won't need to receive
 486                          * PropertyNotify events anymore.
 487                          */
 488                         MODBIT(xw.attrs.event_mask, 0, PropertyChangeMask);
 489                         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
 490                                         &xw.attrs);
 491                 }
 492
 493                 if (type == incratom) {
 494                         /*
 495                          * Activate the PropertyNotify events so we receive
 496                          * when the selection owner does send us the next
 497                          * chunk of data.
 498                          */
 499                         MODBIT(xw.attrs.event_mask, 1, PropertyChangeMask);
 500                         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
 501                                         &xw.attrs);
 502
 503                         /*
 504                          * Deleting the property is the transfer start signal.
 505                          */
 506                         XDeleteProperty(xw.dpy, xw.win, (int)property);
 507                         continue;
 508                 }
 509
 510                 /*
 511                  * As seen in getsel:
 512                  * Line endings are inconsistent in the terminal and GUI world
 513                  * copy and pasting. When receiving some selection data,
 514                  * replace all '\n' with '\r'.
 515                  * FIXME: Fix the computer world.
 516                  */
 517                 repl = data;
 518                 last = data + nitems * format / 8;
 519                 while ((repl = memchr(repl, '\n', last - repl))) {
 520                         *repl++ = '\r';
 521                 }
 522
 523                 if (IS_SET(MODE_BRCKTPASTE) && ofs == 0)
 524                         ttywrite("\033[200~", 6, 0);
 525                 ttywrite((char *)data, nitems * format / 8, 1);
 526                 if (IS_SET(MODE_BRCKTPASTE) && rem == 0)
 527                         ttywrite("\033[201~", 6, 0);
 528                 XFree(data);
 529                 /* number of 32-bit chunks returned */
 530                 ofs += nitems * format / 32;
 531         } while (rem > 0);
 532
 533         /*
 534          * Deleting the property again tells the selection owner to send the
 535          * next data chunk in the property.
 536          */
 537         XDeleteProperty(xw.dpy, xw.win, (int)property);
 538 }
 539
 540 void
 541 xclipcopy(void)
 542 {
 543         clipcopy(NULL);
 544 }
 545
 546 void
 547 selclear_(XEvent *e)
 548 {
 549         selclear();
 550 }
 551
 552 void
 553 selrequest(XEvent *e)
 554 {
 555         XSelectionRequestEvent *xsre;
 556         XSelectionEvent xev;
 557         Atom xa_targets, string, clipboard;
 558         char *seltext;
 559
 560         xsre = (XSelectionRequestEvent *) e;
 561         xev.type = SelectionNotify;
 562         xev.requestor = xsre->requestor;
 563         xev.selection = xsre->selection;
 564         xev.target = xsre->target;
 565         xev.time = xsre->time;
 566         if (xsre->property == None)
 567                 xsre->property = xsre->target;
 568
 569         /* reject */
 570         xev.property = None;
 571
 572         xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
 573         if (xsre->target == xa_targets) {
 574                 /* respond with the supported type */
 575                 string = xsel.xtarget;
 576                 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
 577                                 XA_ATOM, 32, PropModeReplace,
 578                                 (uchar *) &string, 1);
 579                 xev.property = xsre->property;
 580         } else if (xsre->target == xsel.xtarget || xsre->target == XA_STRING) {
 581                 /*
 582                  * xith XA_STRING non ascii characters may be incorrect in the
 583                  * requestor. It is not our problem, use utf8.
 584                  */
 585                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 586                 if (xsre->selection == XA_PRIMARY) {
 587                         seltext = xsel.primary;
 588                 } else if (xsre->selection == clipboard) {
 589                         seltext = xsel.clipboard;
 590                 } else {
 591                         fprintf(stderr,
 592                                 "Unhandled clipboard selection 0x%lx\n",
 593                                 xsre->selection);
 594                         return;
 595                 }
 596                 if (seltext != NULL) {
 597                         XChangeProperty(xsre->display, xsre->requestor,
 598                                         xsre->property, xsre->target,
 599                                         8, PropModeReplace,
 600                                         (uchar *)seltext, strlen(seltext));
 601                         xev.property = xsre->property;
 602                 }
 603         }
 604
 605         /* all done, send a notification to the listener */
 606         if (!XSendEvent(xsre->display, xsre->requestor, 1, 0, (XEvent *) &xev))
 607                 fprintf(stderr, "Error sending SelectionNotify event\n");
 608 }
 609
 610 void
 611 setsel(char *str, Time t)
 612 {
 613         free(xsel.primary);
 614         xsel.primary = str;
 615
 616         XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
 617         if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
 618                 selclear_(NULL);
 619 }
 620
 621 void
 622 xsetsel(char *str)
 623 {
 624         setsel(str, CurrentTime);
 625 }
 626
 627 void
 628 brelease(XEvent *e)
 629 {
 630         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 631                 mousereport(e);
 632                 return;
 633         }
 634
 635         if (e->xbutton.button == Button2)
 636                 selpaste(NULL);
 637         else if (e->xbutton.button == Button1)
 638                 mousesel(e, 1);
 639 }
 640
 641 void
 642 bmotion(XEvent *e)
 643 {
 644         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 645                 mousereport(e);
 646                 return;
 647         }
 648
 649         mousesel(e, 0);
 650 }
 651
 652 void
 653 cresize(int width, int height)
 654 {
 655         int col, row;
 656
 657         if (width != 0)
 658                 win.w = width;
 659         if (height != 0)
 660                 win.h = height;
 661
 662         col = (win.w - 2 * borderpx) / win.cw;
 663         row = (win.h - 2 * borderpx) / win.ch;
 664
 665         tresize(col, row);
 666         xresize(col, row);
 667         ttyresize(win.tw, win.th);
 668 }
 669
 670 void
 671 xresize(int col, int row)
 672 {
 673         win.tw = MAX(1, col * win.cw);
 674         win.th = MAX(1, row * win.ch);
 675
 676         XFreePixmap(xw.dpy, xw.buf);
 677         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
 678                         DefaultDepth(xw.dpy, xw.scr));
 679         XftDrawChange(xw.draw, xw.buf);
 680         xclear(0, 0, win.w, win.h);
 681
 682         /* resize to new width */
 683         xw.specbuf = xrealloc(xw.specbuf, col * sizeof(GlyphFontSpec));
 684 }
 685
 686 ushort
 687 sixd_to_16bit(int x)
 688 {
 689         return x == 0 ? 0 : 0x3737 + 0x2828 * x;
 690 }
 691
 692 int
 693 xloadcolor(int i, const char *name, Color *ncolor)
 694 {
 695         XRenderColor color = { .alpha = 0xffff };
 696
 697         if (!name) {
 698                 if (BETWEEN(i, 16, 255)) { /* 256 color */
 699                         if (i < 6*6*6+16) { /* same colors as xterm */
 700                                 color.red   = sixd_to_16bit( ((i-16)/36)%6 );
 701                                 color.green = sixd_to_16bit( ((i-16)/6) %6 );
 702                                 color.blue  = sixd_to_16bit( ((i-16)/1) %6 );
 703                         } else { /* greyscale */
 704                                 color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
 705                                 color.green = color.blue = color.red;
 706                         }
 707                         return XftColorAllocValue(xw.dpy, xw.vis,
 708                                                   xw.cmap, &color, ncolor);
 709                 } else
 710                         name = colorname[i];
 711         }
 712
 713         return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
 714 }
 715
 716 void
 717 xloadcols(void)
 718 {
 719         int i;
 720         static int loaded;
 721         Color *cp;
 722
 723         dc.collen = MAX(LEN(colorname), 256);
 724         dc.col = xmalloc(dc.collen * sizeof(Color));
 725
 726         if (loaded) {
 727                 for (cp = dc.col; cp < &dc.col[dc.collen]; ++cp)
 728                         XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
 729         }
 730
 731         for (i = 0; i < dc.collen; i++)
 732                 if (!xloadcolor(i, NULL, &dc.col[i])) {
 733                         if (colorname[i])
 734                                 die("Could not allocate color '%s'\n", colorname[i]);
 735                         else
 736                                 die("Could not allocate color %d\n", i);
 737                 }
 738         loaded = 1;
 739 }
 740
 741 int
 742 xsetcolorname(int x, const char *name)
 743 {
 744         Color ncolor;
 745
 746         if (!BETWEEN(x, 0, dc.collen))
 747                 return 1;
 748
 749
 750         if (!xloadcolor(x, name, &ncolor))
 751                 return 1;
 752
 753         XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
 754         dc.col[x] = ncolor;
 755
 756         return 0;
 757 }
 758
 759 /*
 760  * Absolute coordinates.
 761  */
 762 void
 763 xclear(int x1, int y1, int x2, int y2)
 764 {
 765         XftDrawRect(xw.draw,
 766                         &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
 767                         x1, y1, x2-x1, y2-y1);
 768 }
 769
 770 void
 771 xhints(void)
 772 {
 773         XClassHint class = {opt_name ? opt_name : termname,
 774                             opt_class ? opt_class : termname};
 775         XWMHints wm = {.flags = InputHint, .input = 1};
 776         XSizeHints *sizeh = NULL;
 777
 778         sizeh = XAllocSizeHints();
 779
 780         sizeh->flags = PSize | PResizeInc | PBaseSize;
 781         sizeh->height = win.h;
 782         sizeh->width = win.w;
 783         sizeh->height_inc = win.ch;
 784         sizeh->width_inc = win.cw;
 785         sizeh->base_height = 2 * borderpx;
 786         sizeh->base_width = 2 * borderpx;
 787         if (xw.isfixed) {
 788                 sizeh->flags |= PMaxSize | PMinSize;
 789                 sizeh->min_width = sizeh->max_width = win.w;
 790                 sizeh->min_height = sizeh->max_height = win.h;
 791         }
 792         if (xw.gm & (XValue|YValue)) {
 793                 sizeh->flags |= USPosition | PWinGravity;
 794                 sizeh->x = xw.l;
 795                 sizeh->y = xw.t;
 796                 sizeh->win_gravity = xgeommasktogravity(xw.gm);
 797         }
 798
 799         XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
 800                         &class);
 801         XFree(sizeh);
 802 }
 803
 804 int
 805 xgeommasktogravity(int mask)
 806 {
 807         switch (mask & (XNegative|YNegative)) {
 808         case 0:
 809                 return NorthWestGravity;
 810         case XNegative:
 811                 return NorthEastGravity;
 812         case YNegative:
 813                 return SouthWestGravity;
 814         }
 815
 816         return SouthEastGravity;
 817 }
 818
 819 int
 820 xloadfont(Font *f, FcPattern *pattern)
 821 {
 822         FcPattern *configured;
 823         FcPattern *match;
 824         FcResult result;
 825         XGlyphInfo extents;
 826         int wantattr, haveattr;
 827
 828         /*
 829          * Manually configure instead of calling XftMatchFont
 830          * so that we can use the configured pattern for
 831          * "missing glyph" lookups.
 832          */
 833         configured = FcPatternDuplicate(pattern);
 834         if (!configured)
 835                 return 1;
 836
 837         FcConfigSubstitute(NULL, configured, FcMatchPattern);
 838         XftDefaultSubstitute(xw.dpy, xw.scr, configured);
 839
 840         match = FcFontMatch(NULL, configured, &result);
 841         if (!match) {
 842                 FcPatternDestroy(configured);
 843                 return 1;
 844         }
 845
 846         if (!(f->match = XftFontOpenPattern(xw.dpy, match))) {
 847                 FcPatternDestroy(configured);
 848                 FcPatternDestroy(match);
 849                 return 1;
 850         }
 851
 852         if ((XftPatternGetInteger(pattern, "slant", 0, &wantattr) ==
 853             XftResultMatch)) {
 854                 /*
 855                  * Check if xft was unable to find a font with the appropriate
 856                  * slant but gave us one anyway. Try to mitigate.
 857                  */
 858                 if ((XftPatternGetInteger(f->match->pattern, "slant", 0,
 859                     &haveattr) != XftResultMatch) || haveattr < wantattr) {
 860                         f->badslant = 1;
 861                         fputs("st: font slant does not match\n", stderr);
 862                 }
 863         }
 864
 865         if ((XftPatternGetInteger(pattern, "weight", 0, &wantattr) ==
 866             XftResultMatch)) {
 867                 if ((XftPatternGetInteger(f->match->pattern, "weight", 0,
 868                     &haveattr) != XftResultMatch) || haveattr != wantattr) {
 869                         f->badweight = 1;
 870                         fputs("st: font weight does not match\n", stderr);
 871                 }
 872         }
 873
 874         XftTextExtentsUtf8(xw.dpy, f->match,
 875                 (const FcChar8 *) ascii_printable,
 876                 strlen(ascii_printable), &extents);
 877
 878         f->set = NULL;
 879         f->pattern = configured;
 880
 881         f->ascent = f->match->ascent;
 882         f->descent = f->match->descent;
 883         f->lbearing = 0;
 884         f->rbearing = f->match->max_advance_width;
 885
 886         f->height = f->ascent + f->descent;
 887         f->width = DIVCEIL(extents.xOff, strlen(ascii_printable));
 888
 889         return 0;
 890 }
 891
 892 void
 893 xloadfonts(char *fontstr, double fontsize)
 894 {
 895         FcPattern *pattern;
 896         double fontval;
 897         float ceilf(float);
 898
 899         if (fontstr[0] == '-') {
 900                 pattern = XftXlfdParse(fontstr, False, False);
 901         } else {
 902                 pattern = FcNameParse((FcChar8 *)fontstr);
 903         }
 904
 905         if (!pattern)
 906                 die("st: can't open font %s\n", fontstr);
 907
 908         if (fontsize > 1) {
 909                 FcPatternDel(pattern, FC_PIXEL_SIZE);
 910                 FcPatternDel(pattern, FC_SIZE);
 911                 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
 912                 usedfontsize = fontsize;
 913         } else {
 914                 if (FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval) ==
 915                                 FcResultMatch) {
 916                         usedfontsize = fontval;
 917                 } else if (FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval) ==
 918                                 FcResultMatch) {
 919                         usedfontsize = -1;
 920                 } else {
 921                         /*
 922                          * Default font size is 12, if none given. This is to
 923                          * have a known usedfontsize value.
 924                          */
 925                         FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
 926                         usedfontsize = 12;
 927                 }
 928                 defaultfontsize = usedfontsize;
 929         }
 930
 931         if (xloadfont(&dc.font, pattern))
 932                 die("st: can't open font %s\n", fontstr);
 933
 934         if (usedfontsize < 0) {
 935                 FcPatternGetDouble(dc.font.match->pattern,
 936                                    FC_PIXEL_SIZE, 0, &fontval);
 937                 usedfontsize = fontval;
 938                 if (fontsize == 0)
 939                         defaultfontsize = fontval;
 940         }
 941
 942         /* Setting character width and height. */
 943         win.cw = ceilf(dc.font.width * cwscale);
 944         win.ch = ceilf(dc.font.height * chscale);
 945
 946         FcPatternDel(pattern, FC_SLANT);
 947         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
 948         if (xloadfont(&dc.ifont, pattern))
 949                 die("st: can't open font %s\n", fontstr);
 950
 951         FcPatternDel(pattern, FC_WEIGHT);
 952         FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
 953         if (xloadfont(&dc.ibfont, pattern))
 954                 die("st: can't open font %s\n", fontstr);
 955
 956         FcPatternDel(pattern, FC_SLANT);
 957         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
 958         if (xloadfont(&dc.bfont, pattern))
 959                 die("st: can't open font %s\n", fontstr);
 960
 961         FcPatternDestroy(pattern);
 962 }
 963
 964 void
 965 xunloadfont(Font *f)
 966 {
 967         XftFontClose(xw.dpy, f->match);
 968         FcPatternDestroy(f->pattern);
 969         if (f->set)
 970                 FcFontSetDestroy(f->set);
 971 }
 972
 973 void
 974 xunloadfonts(void)
 975 {
 976         /* Free the loaded fonts in the font cache.  */
 977         while (frclen > 0)
 978                 XftFontClose(xw.dpy, frc[--frclen].font);
 979
 980         xunloadfont(&dc.font);
 981         xunloadfont(&dc.bfont);
 982         xunloadfont(&dc.ifont);
 983         xunloadfont(&dc.ibfont);
 984 }
 985
 986 void
 987 xinit(void)
 988 {
 989         XGCValues gcvalues;
 990         Cursor cursor;
 991         Window parent;
 992         pid_t thispid = getpid();
 993         XColor xmousefg, xmousebg;
 994
 995         if (!(xw.dpy = XOpenDisplay(NULL)))
 996                 die("Can't open display\n");
 997         xw.scr = XDefaultScreen(xw.dpy);
 998         xw.vis = XDefaultVisual(xw.dpy, xw.scr);
 999
1000         /* font */
1001         if (!FcInit())
1002                 die("Could not init fontconfig.\n");
1003
1004         usedfont = (opt_font == NULL)? font : opt_font;
1005         xloadfonts(usedfont, 0);
1006
1007         /* colors */
1008         xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1009         xloadcols();
1010
1011         /* adjust fixed window geometry */
1012         win.w = 2 * borderpx + term.col * win.cw;
1013         win.h = 2 * borderpx + term.row * win.ch;
1014         if (xw.gm & XNegative)
1015                 xw.l += DisplayWidth(xw.dpy, xw.scr) - win.w - 2;
1016         if (xw.gm & YNegative)
1017                 xw.t += DisplayHeight(xw.dpy, xw.scr) - win.h - 2;
1018
1019         /* Events */
1020         xw.attrs.background_pixel = dc.col[defaultbg].pixel;
1021         xw.attrs.border_pixel = dc.col[defaultbg].pixel;
1022         xw.attrs.bit_gravity = NorthWestGravity;
1023         xw.attrs.event_mask = FocusChangeMask | KeyPressMask
1024                 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1025                 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
1026         xw.attrs.colormap = xw.cmap;
1027
1028         if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
1029                 parent = XRootWindow(xw.dpy, xw.scr);
1030         xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
1031                         win.w, win.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
1032                         xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
1033                         | CWEventMask | CWColormap, &xw.attrs);
1034
1035         memset(&gcvalues, 0, sizeof(gcvalues));
1036         gcvalues.graphics_exposures = False;
1037         dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
1038                         &gcvalues);
1039         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
1040                         DefaultDepth(xw.dpy, xw.scr));
1041         XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
1042         XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, win.w, win.h);
1043
1044         /* font spec buffer */
1045         xw.specbuf = xmalloc(term.col * sizeof(GlyphFontSpec));
1046
1047         /* Xft rendering context */
1048         xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
1049
1050         /* input methods */
1051         if ((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
1052                 XSetLocaleModifiers("@im=local");
1053                 if ((xw.xim =  XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
1054                         XSetLocaleModifiers("@im=");
1055                         if ((xw.xim = XOpenIM(xw.dpy,
1056                                         NULL, NULL, NULL)) == NULL) {
1057                                 die("XOpenIM failed. Could not open input"
1058                                         " device.\n");
1059                         }
1060                 }
1061         }
1062         xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
1063                                            | XIMStatusNothing, XNClientWindow, xw.win,
1064                                            XNFocusWindow, xw.win, NULL);
1065         if (xw.xic == NULL)
1066                 die("XCreateIC failed. Could not obtain input method.\n");
1067
1068         /* white cursor, black outline */
1069         cursor = XCreateFontCursor(xw.dpy, mouseshape);
1070         XDefineCursor(xw.dpy, xw.win, cursor);
1071
1072         if (XParseColor(xw.dpy, xw.cmap, colorname[mousefg], &xmousefg) == 0) {
1073                 xmousefg.red   = 0xffff;
1074                 xmousefg.green = 0xffff;
1075                 xmousefg.blue  = 0xffff;
1076         }
1077
1078         if (XParseColor(xw.dpy, xw.cmap, colorname[mousebg], &xmousebg) == 0) {
1079                 xmousebg.red   = 0x0000;
1080                 xmousebg.green = 0x0000;
1081                 xmousebg.blue  = 0x0000;
1082         }
1083
1084         XRecolorCursor(xw.dpy, cursor, &xmousefg, &xmousebg);
1085
1086         xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
1087         xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
1088         xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
1089         XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
1090
1091         xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
1092         XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
1093                         PropModeReplace, (uchar *)&thispid, 1);
1094
1095         win.mode = MODE_NUMLOCK;
1096         resettitle();
1097         XMapWindow(xw.dpy, xw.win);
1098         xhints();
1099         XSync(xw.dpy, False);
1100
1101         clock_gettime(CLOCK_MONOTONIC, &xsel.tclick1);
1102         clock_gettime(CLOCK_MONOTONIC, &xsel.tclick2);
1103         xsel.primary = NULL;
1104         xsel.clipboard = NULL;
1105         xsel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
1106         if (xsel.xtarget == None)
1107                 xsel.xtarget = XA_STRING;
1108 }
1109
1110 int
1111 xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x, int y)
1112 {
1113         float winx = borderpx + x * win.cw, winy = borderpx + y * win.ch, xp, yp;
1114         ushort mode, prevmode = USHRT_MAX;
1115         Font *font = &dc.font;
1116         int frcflags = FRC_NORMAL;
1117         float runewidth = win.cw;
1118         Rune rune;
1119         FT_UInt glyphidx;
1120         FcResult fcres;
1121         FcPattern *fcpattern, *fontpattern;
1122         FcFontSet *fcsets[] = { NULL };
1123         FcCharSet *fccharset;
1124         int i, f, numspecs = 0;
1125
1126         for (i = 0, xp = winx, yp = winy + font->ascent; i < len; ++i) {
1127                 /* Fetch rune and mode for current glyph. */
1128                 rune = glyphs[i].u;
1129                 mode = glyphs[i].mode;
1130
1131                 /* Skip dummy wide-character spacing. */
1132                 if (mode == ATTR_WDUMMY)
1133                         continue;
1134
1135                 /* Determine font for glyph if different from previous glyph. */
1136                 if (prevmode != mode) {
1137                         prevmode = mode;
1138                         font = &dc.font;
1139                         frcflags = FRC_NORMAL;
1140                         runewidth = win.cw * ((mode & ATTR_WIDE) ? 2.0f : 1.0f);
1141                         if ((mode & ATTR_ITALIC) && (mode & ATTR_BOLD)) {
1142                                 font = &dc.ibfont;
1143                                 frcflags = FRC_ITALICBOLD;
1144                         } else if (mode & ATTR_ITALIC) {
1145                                 font = &dc.ifont;
1146                                 frcflags = FRC_ITALIC;
1147                         } else if (mode & ATTR_BOLD) {
1148                                 font = &dc.bfont;
1149                                 frcflags = FRC_BOLD;
1150                         }
1151                         yp = winy + font->ascent;
1152                 }
1153
1154                 /* Lookup character index with default font. */
1155                 glyphidx = XftCharIndex(xw.dpy, font->match, rune);
1156                 if (glyphidx) {
1157                         specs[numspecs].font = font->match;
1158                         specs[numspecs].glyph = glyphidx;
1159                         specs[numspecs].x = (short)xp;
1160                         specs[numspecs].y = (short)yp;
1161                         xp += runewidth;
1162                         numspecs++;
1163                         continue;
1164                 }
1165
1166                 /* Fallback on font cache, search the font cache for match. */
1167                 for (f = 0; f < frclen; f++) {
1168                         glyphidx = XftCharIndex(xw.dpy, frc[f].font, rune);
1169                         /* Everything correct. */
1170                         if (glyphidx && frc[f].flags == frcflags)
1171                                 break;
1172                         /* We got a default font for a not found glyph. */
1173                         if (!glyphidx && frc[f].flags == frcflags
1174                                         && frc[f].unicodep == rune) {
1175                                 break;
1176                         }
1177                 }
1178
1179                 /* Nothing was found. Use fontconfig to find matching font. */
1180                 if (f >= frclen) {
1181                         if (!font->set)
1182                                 font->set = FcFontSort(0, font->pattern,
1183                                                        1, 0, &fcres);
1184                         fcsets[0] = font->set;
1185
1186                         /*
1187                          * Nothing was found in the cache. Now use
1188                          * some dozen of Fontconfig calls to get the
1189                          * font for one single character.
1190                          *
1191                          * Xft and fontconfig are design failures.
1192                          */
1193                         fcpattern = FcPatternDuplicate(font->pattern);
1194                         fccharset = FcCharSetCreate();
1195
1196                         FcCharSetAddChar(fccharset, rune);
1197                         FcPatternAddCharSet(fcpattern, FC_CHARSET,
1198                                         fccharset);
1199                         FcPatternAddBool(fcpattern, FC_SCALABLE, 1);
1200
1201                         FcConfigSubstitute(0, fcpattern,
1202                                         FcMatchPattern);
1203                         FcDefaultSubstitute(fcpattern);
1204
1205                         fontpattern = FcFontSetMatch(0, fcsets, 1,
1206                                         fcpattern, &fcres);
1207
1208                         /*
1209                          * Overwrite or create the new cache entry.
1210                          */
1211                         if (frclen >= LEN(frc)) {
1212                                 frclen = LEN(frc) - 1;
1213                                 XftFontClose(xw.dpy, frc[frclen].font);
1214                                 frc[frclen].unicodep = 0;
1215                         }
1216
1217                         frc[frclen].font = XftFontOpenPattern(xw.dpy,
1218                                         fontpattern);
1219                         if (!frc[frclen].font)
1220                                 die("XftFontOpenPattern failed seeking fallback font: %s\n",
1221                                         strerror(errno));
1222                         frc[frclen].flags = frcflags;
1223                         frc[frclen].unicodep = rune;
1224
1225                         glyphidx = XftCharIndex(xw.dpy, frc[frclen].font, rune);
1226
1227                         f = frclen;
1228                         frclen++;
1229
1230                         FcPatternDestroy(fcpattern);
1231                         FcCharSetDestroy(fccharset);
1232                 }
1233
1234                 specs[numspecs].font = frc[f].font;
1235                 specs[numspecs].glyph = glyphidx;
1236                 specs[numspecs].x = (short)xp;
1237                 specs[numspecs].y = (short)yp;
1238                 xp += runewidth;
1239                 numspecs++;
1240         }
1241
1242         return numspecs;
1243 }
1244
1245 void
1246 xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, int y)
1247 {
1248         int charlen = len * ((base.mode & ATTR_WIDE) ? 2 : 1);
1249         int winx = borderpx + x * win.cw, winy = borderpx + y * win.ch,
1250             width = charlen * win.cw;
1251         Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
1252         XRenderColor colfg, colbg;
1253         XRectangle r;
1254
1255         /* Fallback on color display for attributes not supported by the font */
1256         if (base.mode & ATTR_ITALIC && base.mode & ATTR_BOLD) {
1257                 if (dc.ibfont.badslant || dc.ibfont.badweight)
1258                         base.fg = defaultattr;
1259         } else if ((base.mode & ATTR_ITALIC && dc.ifont.badslant) ||
1260             (base.mode & ATTR_BOLD && dc.bfont.badweight)) {
1261                 base.fg = defaultattr;
1262         }
1263
1264         if (IS_TRUECOL(base.fg)) {
1265                 colfg.alpha = 0xffff;
1266                 colfg.red = TRUERED(base.fg);
1267                 colfg.green = TRUEGREEN(base.fg);
1268                 colfg.blue = TRUEBLUE(base.fg);
1269                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
1270                 fg = &truefg;
1271         } else {
1272                 fg = &dc.col[base.fg];
1273         }
1274
1275         if (IS_TRUECOL(base.bg)) {
1276                 colbg.alpha = 0xffff;
1277                 colbg.green = TRUEGREEN(base.bg);
1278                 colbg.red = TRUERED(base.bg);
1279                 colbg.blue = TRUEBLUE(base.bg);
1280                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
1281                 bg = &truebg;
1282         } else {
1283                 bg = &dc.col[base.bg];
1284         }
1285
1286         /* Change basic system colors [0-7] to bright system colors [8-15] */
1287         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_BOLD && BETWEEN(base.fg, 0, 7))
1288                 fg = &dc.col[base.fg + 8];
1289
1290         if (IS_SET(MODE_REVERSE)) {
1291                 if (fg == &dc.col[defaultfg]) {
1292                         fg = &dc.col[defaultbg];
1293                 } else {
1294                         colfg.red = ~fg->color.red;
1295                         colfg.green = ~fg->color.green;
1296                         colfg.blue = ~fg->color.blue;
1297                         colfg.alpha = fg->color.alpha;
1298                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
1299                                         &revfg);
1300                         fg = &revfg;
1301                 }
1302
1303                 if (bg == &dc.col[defaultbg]) {
1304                         bg = &dc.col[defaultfg];
1305                 } else {
1306                         colbg.red = ~bg->color.red;
1307                         colbg.green = ~bg->color.green;
1308                         colbg.blue = ~bg->color.blue;
1309                         colbg.alpha = bg->color.alpha;
1310                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
1311                                         &revbg);
1312                         bg = &revbg;
1313                 }
1314         }
1315
1316         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_FAINT) {
1317                 colfg.red = fg->color.red / 2;
1318                 colfg.green = fg->color.green / 2;
1319                 colfg.blue = fg->color.blue / 2;
1320                 colfg.alpha = fg->color.alpha;
1321                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
1322                 fg = &revfg;
1323         }
1324
1325         if (base.mode & ATTR_REVERSE) {
1326                 temp = fg;
1327                 fg = bg;
1328                 bg = temp;
1329         }
1330
1331         if (base.mode & ATTR_BLINK && win.mode & MODE_BLINK)
1332                 fg = bg;
1333
1334         if (base.mode & ATTR_INVISIBLE)
1335                 fg = bg;
1336
1337         /* Intelligent cleaning up of the borders. */
1338         if (x == 0) {
1339                 xclear(0, (y == 0)? 0 : winy, borderpx,
1340                         winy + win.ch + ((y >= term.row-1)? win.h : 0));
1341         }
1342         if (x + charlen >= term.col) {
1343                 xclear(winx + width, (y == 0)? 0 : winy, win.w,
1344                         ((y >= term.row-1)? win.h : (winy + win.ch)));
1345         }
1346         if (y == 0)
1347                 xclear(winx, 0, winx + width, borderpx);
1348         if (y == term.row-1)
1349                 xclear(winx, winy + win.ch, winx + width, win.h);
1350
1351         /* Clean up the region we want to draw to. */
1352         XftDrawRect(xw.draw, bg, winx, winy, width, win.ch);
1353
1354         /* Set the clip region because Xft is sometimes dirty. */
1355         r.x = 0;
1356         r.y = 0;
1357         r.height = win.ch;
1358         r.width = width;
1359         XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
1360
1361         /* Render the glyphs. */
1362         XftDrawGlyphFontSpec(xw.draw, fg, specs, len);
1363
1364         /* Render underline and strikethrough. */
1365         if (base.mode & ATTR_UNDERLINE) {
1366                 XftDrawRect(xw.draw, fg, winx, winy + dc.font.ascent + 1,
1367                                 width, 1);
1368         }
1369
1370         if (base.mode & ATTR_STRUCK) {
1371                 XftDrawRect(xw.draw, fg, winx, winy + 2 * dc.font.ascent / 3,
1372                                 width, 1);
1373         }
1374
1375         /* Reset clip to none. */
1376         XftDrawSetClip(xw.draw, 0);
1377 }
1378
1379 void
1380 xdrawglyph(Glyph g, int x, int y)
1381 {
1382         int numspecs;
1383         XftGlyphFontSpec spec;
1384
1385         numspecs = xmakeglyphfontspecs(&spec, &g, 1, x, y);
1386         xdrawglyphfontspecs(&spec, g, numspecs, x, y);
1387 }
1388
1389 void
1390 xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og)
1391 {
1392         Color drawcol;
1393
1394         /* remove the old cursor */
1395         if (selected(ox, oy))
1396                 og.mode ^= ATTR_REVERSE;
1397         xdrawglyph(og, ox, oy);
1398
1399         /*
1400          * Select the right color for the right mode.
1401          */
1402         g.mode &= ATTR_BOLD|ATTR_ITALIC|ATTR_UNDERLINE|ATTR_STRUCK|ATTR_WIDE;
1403         g.fg = defaultbg;
1404         g.bg = defaultcs;
1405
1406         if (IS_SET(MODE_REVERSE)) {
1407                 g.mode |= ATTR_REVERSE;
1408                 g.bg = defaultfg;
1409                 if (selected(cx, cy)) {
1410                         drawcol = dc.col[defaultcs];
1411                         g.fg = defaultrcs;
1412                 } else {
1413                         drawcol = dc.col[defaultrcs];
1414                         g.fg = defaultcs;
1415                 }
1416         } else {
1417                 if (selected(cx, cy)) {
1418                         drawcol = dc.col[defaultrcs];
1419                         g.fg = defaultfg;
1420                         g.bg = defaultrcs;
1421                 } else {
1422                         drawcol = dc.col[defaultcs];
1423                 }
1424         }
1425
1426         if (IS_SET(MODE_HIDE))
1427                 return;
1428
1429         /* draw the new one */
1430         if (IS_SET(MODE_FOCUSED)) {
1431                 switch (win.cursor) {
1432                 case 7: /* st extension: snowman */
1433                         utf8decode("☃", &g.u, UTF_SIZ);
1434                 case 0: /* Blinking Block */
1435                 case 1: /* Blinking Block (Default) */
1436                 case 2: /* Steady Block */
1437                         xdrawglyph(g, cx, cy);
1438                         break;
1439                 case 3: /* Blinking Underline */
1440                 case 4: /* Steady Underline */
1441                         XftDrawRect(xw.draw, &drawcol,
1442                                         borderpx + cx * win.cw,
1443                                         borderpx + (cy + 1) * win.ch - \
1444                                                 cursorthickness,
1445                                         win.cw, cursorthickness);
1446                         break;
1447                 case 5: /* Blinking bar */
1448                 case 6: /* Steady bar */
1449                         XftDrawRect(xw.draw, &drawcol,
1450                                         borderpx + cx * win.cw,
1451                                         borderpx + cy * win.ch,
1452                                         cursorthickness, win.ch);
1453                         break;
1454                 }
1455         } else {
1456                 XftDrawRect(xw.draw, &drawcol,
1457                                 borderpx + cx * win.cw,
1458                                 borderpx + cy * win.ch,
1459                                 win.cw - 1, 1);
1460                 XftDrawRect(xw.draw, &drawcol,
1461                                 borderpx + cx * win.cw,
1462                                 borderpx + cy * win.ch,
1463                                 1, win.ch - 1);
1464                 XftDrawRect(xw.draw, &drawcol,
1465                                 borderpx + (cx + 1) * win.cw - 1,
1466                                 borderpx + cy * win.ch,
1467                                 1, win.ch - 1);
1468                 XftDrawRect(xw.draw, &drawcol,
1469                                 borderpx + cx * win.cw,
1470                                 borderpx + (cy + 1) * win.ch - 1,
1471                                 win.cw, 1);
1472         }
1473 }
1474
1475 void
1476 xsetenv(void)
1477 {
1478         char buf[sizeof(long) * 8 + 1];
1479
1480         snprintf(buf, sizeof(buf), "%lu", xw.win);
1481         setenv("WINDOWID", buf, 1);
1482 }
1483
1484 void
1485 xsettitle(char *p)
1486 {
1487         XTextProperty prop;
1488         DEFAULT(p, "st");
1489
1490         Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
1491                         &prop);
1492         XSetWMName(xw.dpy, xw.win, &prop);
1493         XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
1494         XFree(prop.value);
1495 }
1496
1497 int
1498 xstartdraw(void)
1499 {
1500         return IS_SET(MODE_VISIBLE);
1501 }
1502
1503 void
1504 xdrawline(Line line, int x1, int y1, int x2)
1505 {
1506         int i, x, ox, numspecs;
1507         Glyph base, new;
1508         XftGlyphFontSpec *specs = xw.specbuf;
1509
1510         numspecs = xmakeglyphfontspecs(specs, &line[x1], x2 - x1, x1, y1);
1511         i = ox = 0;
1512         for (x = x1; x < x2 && i < numspecs; x++) {
1513                 new = line[x];
1514                 if (new.mode == ATTR_WDUMMY)
1515                         continue;
1516                 if (selected(x, y1))
1517                         new.mode ^= ATTR_REVERSE;
1518                 if (i > 0 && ATTRCMP(base, new)) {
1519                         xdrawglyphfontspecs(specs, base, i, ox, y1);
1520                         specs += i;
1521                         numspecs -= i;
1522                         i = 0;
1523                 }
1524                 if (i == 0) {
1525                         ox = x;
1526                         base = new;
1527                 }
1528                 i++;
1529         }
1530         if (i > 0)
1531                 xdrawglyphfontspecs(specs, base, i, ox, y1);
1532 }
1533
1534 void
1535 xfinishdraw(void)
1536 {
1537         XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, win.w,
1538                         win.h, 0, 0);
1539         XSetForeground(xw.dpy, dc.gc,
1540                         dc.col[IS_SET(MODE_REVERSE)?
1541                                 defaultfg : defaultbg].pixel);
1542 }
1543
1544 void
1545 expose(XEvent *ev)
1546 {
1547         redraw();
1548 }
1549
1550 void
1551 visibility(XEvent *ev)
1552 {
1553         XVisibilityEvent *e = &ev->xvisibility;
1554
1555         MODBIT(win.mode, e->state != VisibilityFullyObscured, MODE_VISIBLE);
1556 }
1557
1558 void
1559 unmap(XEvent *ev)
1560 {
1561         win.mode &= ~MODE_VISIBLE;
1562 }
1563
1564 void
1565 xsetpointermotion(int set)
1566 {
1567         MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
1568         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
1569 }
1570
1571 void
1572 xsetmode(int set, unsigned int flags)
1573 {
1574         int mode = win.mode;
1575         MODBIT(win.mode, set, flags);
1576         if ((win.mode & MODE_REVERSE) != (mode & MODE_REVERSE))
1577                 redraw();
1578 }
1579
1580 int
1581 xsetcursor(int cursor)
1582 {
1583         DEFAULT(cursor, 1);
1584         if (!BETWEEN(cursor, 0, 6))
1585                 return 1;
1586         win.cursor = cursor;
1587         return 0;
1588 }
1589
1590 void
1591 xseturgency(int add)
1592 {
1593         XWMHints *h = XGetWMHints(xw.dpy, xw.win);
1594
1595         MODBIT(h->flags, add, XUrgencyHint);
1596         XSetWMHints(xw.dpy, xw.win, h);
1597         XFree(h);
1598 }
1599
1600 void
1601 xbell(void)
1602 {
1603         if (!(IS_SET(MODE_FOCUSED)))
1604                 xseturgency(1);
1605         if (bellvolume)
1606                 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
1607 }
1608
1609 void
1610 focus(XEvent *ev)
1611 {
1612         XFocusChangeEvent *e = &ev->xfocus;
1613
1614         if (e->mode == NotifyGrab)
1615                 return;
1616
1617         if (ev->type == FocusIn) {
1618                 XSetICFocus(xw.xic);
1619                 win.mode |= MODE_FOCUSED;
1620                 xseturgency(0);
1621                 if (IS_SET(MODE_FOCUS))
1622                         ttywrite("\033[I", 3, 0);
1623         } else {
1624                 XUnsetICFocus(xw.xic);
1625                 win.mode &= ~MODE_FOCUSED;
1626                 if (IS_SET(MODE_FOCUS))
1627                         ttywrite("\033[O", 3, 0);
1628         }
1629 }
1630
1631 int
1632 match(uint mask, uint state)
1633 {
1634         return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
1635 }
1636
1637 char*
1638 kmap(KeySym k, uint state)
1639 {
1640         Key *kp;
1641         int i;
1642
1643         /* Check for mapped keys out of X11 function keys. */
1644         for (i = 0; i < LEN(mappedkeys); i++) {
1645                 if (mappedkeys[i] == k)
1646                         break;
1647         }
1648         if (i == LEN(mappedkeys)) {
1649                 if ((k & 0xFFFF) < 0xFD00)
1650                         return NULL;
1651         }
1652
1653         for (kp = key; kp < key + LEN(key); kp++) {
1654                 if (kp->k != k)
1655                         continue;
1656
1657                 if (!match(kp->mask, state))
1658                         continue;
1659
1660                 if (IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
1661                         continue;
1662                 if (IS_SET(MODE_NUMLOCK) && kp->appkey == 2)
1663                         continue;
1664
1665                 if (IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
1666                         continue;
1667
1668                 return kp->s;
1669         }
1670
1671         return NULL;
1672 }
1673
1674 void
1675 kpress(XEvent *ev)
1676 {
1677         XKeyEvent *e = &ev->xkey;
1678         KeySym ksym;
1679         char buf[32], *customkey;
1680         int len;
1681         Rune c;
1682         Status status;
1683         Shortcut *bp;
1684
1685         if (IS_SET(MODE_KBDLOCK))
1686                 return;
1687
1688         len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
1689         /* 1. shortcuts */
1690         for (bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
1691                 if (ksym == bp->keysym && match(bp->mod, e->state)) {
1692                         bp->func(&(bp->arg));
1693                         return;
1694                 }
1695         }
1696
1697         /* 2. custom keys from config.h */
1698         if ((customkey = kmap(ksym, e->state))) {
1699                 ttywrite(customkey, strlen(customkey), 1);
1700                 return;
1701         }
1702
1703         /* 3. composed string from input method */
1704         if (len == 0)
1705                 return;
1706         if (len == 1 && e->state & Mod1Mask) {
1707                 if (IS_SET(MODE_8BIT)) {
1708                         if (*buf < 0177) {
1709                                 c = *buf | 0x80;
1710                                 len = utf8encode(c, buf);
1711                         }
1712                 } else {
1713                         buf[1] = buf[0];
1714                         buf[0] = '\033';
1715                         len = 2;
1716                 }
1717         }
1718         ttywrite(buf, len, 1);
1719 }
1720
1721
1722 void
1723 cmessage(XEvent *e)
1724 {
1725         /*
1726          * See xembed specs
1727          *  http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
1728          */
1729         if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
1730                 if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
1731                         win.mode |= MODE_FOCUSED;
1732                         xseturgency(0);
1733                 } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
1734                         win.mode &= ~MODE_FOCUSED;
1735                 }
1736         } else if (e->xclient.data.l[0] == xw.wmdeletewin) {
1737                 /* Send SIGHUP to shell */
1738                 kill(pid, SIGHUP);
1739                 exit(0);
1740         }
1741 }
1742
1743 void
1744 resize(XEvent *e)
1745 {
1746         if (e->xconfigure.width == win.w && e->xconfigure.height == win.h)
1747                 return;
1748
1749         cresize(e->xconfigure.width, e->xconfigure.height);
1750 }
1751
1752 void
1753 run(void)
1754 {
1755         XEvent ev;
1756         int w = win.w, h = win.h;
1757         fd_set rfd;
1758         int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
1759         struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
1760         long deltatime;
1761
1762         /* Waiting for window mapping */
1763         do {
1764                 XNextEvent(xw.dpy, &ev);
1765                 /*
1766                  * This XFilterEvent call is required because of XOpenIM. It
1767                  * does filter out the key event and some client message for
1768                  * the input method too.
1769                  */
1770                 if (XFilterEvent(&ev, None))
1771                         continue;
1772                 if (ev.type == ConfigureNotify) {
1773                         w = ev.xconfigure.width;
1774                         h = ev.xconfigure.height;
1775                 }
1776         } while (ev.type != MapNotify);
1777
1778         ttynew(opt_line, opt_io, opt_cmd);
1779         cresize(w, h);
1780
1781         clock_gettime(CLOCK_MONOTONIC, &last);
1782         lastblink = last;
1783
1784         for (xev = actionfps;;) {
1785                 FD_ZERO(&rfd);
1786                 FD_SET(cmdfd, &rfd);
1787                 FD_SET(xfd, &rfd);
1788
1789                 if (pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
1790                         if (errno == EINTR)
1791                                 continue;
1792                         die("select failed: %s\n", strerror(errno));
1793                 }
1794                 if (FD_ISSET(cmdfd, &rfd)) {
1795                         ttyread();
1796                         if (blinktimeout) {
1797                                 blinkset = tattrset(ATTR_BLINK);
1798                                 if (!blinkset)
1799                                         MODBIT(win.mode, 0, MODE_BLINK);
1800                         }
1801                 }
1802
1803                 if (FD_ISSET(xfd, &rfd))
1804                         xev = actionfps;
1805
1806                 clock_gettime(CLOCK_MONOTONIC, &now);
1807                 drawtimeout.tv_sec = 0;
1808                 drawtimeout.tv_nsec =  (1000 * 1E6)/ xfps;
1809                 tv = &drawtimeout;
1810
1811                 dodraw = 0;
1812                 if (blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
1813                         tsetdirtattr(ATTR_BLINK);
1814                         win.mode ^= MODE_BLINK;
1815                         lastblink = now;
1816                         dodraw = 1;
1817                 }
1818                 deltatime = TIMEDIFF(now, last);
1819                 if (deltatime > 1000 / (xev ? xfps : actionfps)) {
1820                         dodraw = 1;
1821                         last = now;
1822                 }
1823
1824                 if (dodraw) {
1825                         while (XPending(xw.dpy)) {
1826                                 XNextEvent(xw.dpy, &ev);
1827                                 if (XFilterEvent(&ev, None))
1828                                         continue;
1829                                 if (handler[ev.type])
1830                                         (handler[ev.type])(&ev);
1831                         }
1832
1833                         draw();
1834                         XFlush(xw.dpy);
1835
1836                         if (xev && !FD_ISSET(xfd, &rfd))
1837                                 xev--;
1838                         if (!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
1839                                 if (blinkset) {
1840                                         if (TIMEDIFF(now, lastblink) \
1841                                                         > blinktimeout) {
1842                                                 drawtimeout.tv_nsec = 1000;
1843                                         } else {
1844                                                 drawtimeout.tv_nsec = (1E6 * \
1845                                                         (blinktimeout - \
1846                                                         TIMEDIFF(now,
1847                                                                 lastblink)));
1848                                         }
1849                                         drawtimeout.tv_sec = \
1850                                             drawtimeout.tv_nsec / 1E9;
1851                                         drawtimeout.tv_nsec %= (long)1E9;
1852                                 } else {
1853                                         tv = NULL;
1854                                 }
1855                         }
1856                 }
1857         }
1858 }
1859
1860 void
1861 usage(void)
1862 {
1863         die("usage: %s [-aiv] [-c class] [-f font] [-g geometry]"
1864             " [-n name] [-o file]\n"
1865             "          [-T title] [-t title] [-w windowid]"
1866             " [[-e] command [args ...]]\n"
1867             "       %s [-aiv] [-c class] [-f font] [-g geometry]"
1868             " [-n name] [-o file]\n"
1869             "          [-T title] [-t title] [-w windowid] -l line"
1870             " [stty_args ...]\n", argv0, argv0);
1871 }
1872
1873 int
1874 main(int argc, char *argv[])
1875 {
1876         xw.l = xw.t = 0;
1877         xw.isfixed = False;
1878         win.cursor = cursorshape;
1879
1880         ARGBEGIN {
1881         case 'a':
1882                 allowaltscreen = 0;
1883                 break;
1884         case 'c':
1885                 opt_class = EARGF(usage());
1886                 break;
1887         case 'e':
1888                 if (argc > 0)
1889                         --argc, ++argv;
1890                 goto run;
1891         case 'f':
1892                 opt_font = EARGF(usage());
1893                 break;
1894         case 'g':
1895                 xw.gm = XParseGeometry(EARGF(usage()),
1896                                 &xw.l, &xw.t, &cols, &rows);
1897                 break;
1898         case 'i':
1899                 xw.isfixed = 1;
1900                 break;
1901         case 'o':
1902                 opt_io = EARGF(usage());
1903                 break;
1904         case 'l':
1905                 opt_line = EARGF(usage());
1906                 break;
1907         case 'n':
1908                 opt_name = EARGF(usage());
1909                 break;
1910         case 't':
1911         case 'T':
1912                 opt_title = EARGF(usage());
1913                 break;
1914         case 'w':
1915                 opt_embed = EARGF(usage());
1916                 break;
1917         case 'v':
1918                 die("%s " VERSION " (c) 2010-2016 st engineers\n", argv0);
1919                 break;
1920         default:
1921                 usage();
1922         } ARGEND;
1923
1924 run:
1925         if (argc > 0) {
1926                 /* eat all remaining arguments */
1927                 opt_cmd = argv;
1928                 if (!opt_title && !opt_line)
1929                         opt_title = basename(xstrdup(argv[0]));
1930         }
1931         setlocale(LC_CTYPE, "");
1932         XSetLocaleModifiers("");
1933         tnew(MAX(cols, 1), MAX(rows, 1));
1934         xinit();
1935         xsetenv();
1936         selinit();
1937         run();
1938
1939         return 0;
1940 }