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 /* XEMBED messages */
  24 #define XEMBED_FOCUS_IN  4
  25 #define XEMBED_FOCUS_OUT 5
  26
  27 /* macros */
  28 #define TRUERED(x)              (((x) & 0xff0000) >> 8)
  29 #define TRUEGREEN(x)            (((x) & 0xff00))
  30 #define TRUEBLUE(x)             (((x) & 0xff) << 8)
  31
  32 typedef XftDraw *Draw;
  33 typedef XftColor Color;
  34 typedef XftGlyphFontSpec GlyphFontSpec;
  35
  36 /* Purely graphic info */
  37 typedef struct {
  38         Display *dpy;
  39         Colormap cmap;
  40         Window win;
  41         Drawable buf;
  42         GlyphFontSpec *specbuf; /* font spec buffer used for rendering */
  43         Atom xembed, wmdeletewin, netwmname, netwmpid;
  44         XIM xim;
  45         XIC xic;
  46         Draw draw;
  47         Visual *vis;
  48         XSetWindowAttributes attrs;
  49         int scr;
  50         int isfixed; /* is fixed geometry? */
  51         int l, t; /* left and top offset */
  52         int gm; /* geometry mask */
  53 } XWindow;
  54
  55 typedef struct {
  56         Atom xtarget;
  57 } XSelection;
  58
  59 /* Font structure */
  60 #define Font Font_
  61 typedef struct {
  62         int height;
  63         int width;
  64         int ascent;
  65         int descent;
  66         int badslant;
  67         int badweight;
  68         short lbearing;
  69         short rbearing;
  70         XftFont *match;
  71         FcFontSet *set;
  72         FcPattern *pattern;
  73 } Font;
  74
  75 /* Drawing Context */
  76 typedef struct {
  77         Color *col;
  78         size_t collen;
  79         Font font, bfont, ifont, ibfont;
  80         GC gc;
  81 } DC;
  82
  83 static inline ushort sixd_to_16bit(int);
  84 static int xmakeglyphfontspecs(XftGlyphFontSpec *, const Glyph *, int, int, int);
  85 static void xdrawglyphfontspecs(const XftGlyphFontSpec *, Glyph, int, int, int);
  86 static void xdrawglyph(Glyph, int, int);
  87 static void xclear(int, int, int, int);
  88 static void xdrawcursor(void);
  89 static int xgeommasktogravity(int);
  90 static void xinit(void);
  91 static int xloadfont(Font *, FcPattern *);
  92 static void xloadfonts(char *, double);
  93 static void xunloadfont(Font *);
  94 static void xunloadfonts(void);
  95 static void xsetenv(void);
  96 static void xseturgency(int);
  97
  98 static void expose(XEvent *);
  99 static void visibility(XEvent *);
 100 static void unmap(XEvent *);
 101 static void kpress(XEvent *);
 102 static void cmessage(XEvent *);
 103 static void resize(XEvent *);
 104 static void focus(XEvent *);
 105 static void brelease(XEvent *);
 106 static void bpress(XEvent *);
 107 static void bmotion(XEvent *);
 108 static void propnotify(XEvent *);
 109 static void selnotify(XEvent *);
 110 static void selclear_(XEvent *);
 111 static void selrequest(XEvent *);
 112
 113 static void selcopy(Time);
 114 static void getbuttoninfo(XEvent *);
 115 static void mousereport(XEvent *);
 116
 117 static void run(void);
 118 static void usage(void);
 119
 120 static void (*handler[LASTEvent])(XEvent *) = {
 121         [KeyPress] = kpress,
 122         [ClientMessage] = cmessage,
 123         [ConfigureNotify] = resize,
 124         [VisibilityNotify] = visibility,
 125         [UnmapNotify] = unmap,
 126         [Expose] = expose,
 127         [FocusIn] = focus,
 128         [FocusOut] = focus,
 129         [MotionNotify] = bmotion,
 130         [ButtonPress] = bpress,
 131         [ButtonRelease] = brelease,
 132 /*
 133  * Uncomment if you want the selection to disappear when you select something
 134  * different in another window.
 135  */
 136 /*      [SelectionClear] = selclear_, */
 137         [SelectionNotify] = selnotify,
 138 /*
 139  * PropertyNotify is only turned on when there is some INCR transfer happening
 140  * for the selection retrieval.
 141  */
 142         [PropertyNotify] = propnotify,
 143         [SelectionRequest] = selrequest,
 144 };
 145
 146 /* Globals */
 147 static DC dc;
 148 static XWindow xw;
 149 static XSelection xsel;
 150
 151 /* Font Ring Cache */
 152 enum {
 153         FRC_NORMAL,
 154         FRC_ITALIC,
 155         FRC_BOLD,
 156         FRC_ITALICBOLD
 157 };
 158
 159 typedef struct {
 160         XftFont *font;
 161         int flags;
 162         Rune unicodep;
 163 } Fontcache;
 164
 165 /* Fontcache is an array now. A new font will be appended to the array. */
 166 static Fontcache frc[16];
 167 static int frclen = 0;
 168 static char *usedfont = NULL;
 169 static double usedfontsize = 0;
 170 static double defaultfontsize = 0;
 171
 172 void
 173 zoom(const Arg *arg)
 174 {
 175         Arg larg;
 176
 177         larg.f = usedfontsize + arg->f;
 178         zoomabs(&larg);
 179 }
 180
 181 void
 182 zoomabs(const Arg *arg)
 183 {
 184         xunloadfonts();
 185         xloadfonts(usedfont, arg->f);
 186         cresize(0, 0);
 187         ttyresize();
 188         redraw();
 189         xhints();
 190 }
 191
 192 void
 193 zoomreset(const Arg *arg)
 194 {
 195         Arg larg;
 196
 197         if (defaultfontsize > 0) {
 198                 larg.f = defaultfontsize;
 199                 zoomabs(&larg);
 200         }
 201 }
 202
 203 void
 204 getbuttoninfo(XEvent *e)
 205 {
 206         int type;
 207         uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
 208
 209         sel.alt = IS_SET(MODE_ALTSCREEN);
 210
 211         sel.oe.x = x2col(e->xbutton.x);
 212         sel.oe.y = y2row(e->xbutton.y);
 213         selnormalize();
 214
 215         sel.type = SEL_REGULAR;
 216         for (type = 1; type < selmaskslen; ++type) {
 217                 if (match(selmasks[type], state)) {
 218                         sel.type = type;
 219                         break;
 220                 }
 221         }
 222 }
 223
 224 void
 225 mousereport(XEvent *e)
 226 {
 227         int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
 228             button = e->xbutton.button, state = e->xbutton.state,
 229             len;
 230         char buf[40];
 231         static int ox, oy;
 232
 233         /* from urxvt */
 234         if (e->xbutton.type == MotionNotify) {
 235                 if (x == ox && y == oy)
 236                         return;
 237                 if (!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
 238                         return;
 239                 /* MOUSE_MOTION: no reporting if no button is pressed */
 240                 if (IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
 241                         return;
 242
 243                 button = oldbutton + 32;
 244                 ox = x;
 245                 oy = y;
 246         } else {
 247                 if (!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
 248                         button = 3;
 249                 } else {
 250                         button -= Button1;
 251                         if (button >= 3)
 252                                 button += 64 - 3;
 253                 }
 254                 if (e->xbutton.type == ButtonPress) {
 255                         oldbutton = button;
 256                         ox = x;
 257                         oy = y;
 258                 } else if (e->xbutton.type == ButtonRelease) {
 259                         oldbutton = 3;
 260                         /* MODE_MOUSEX10: no button release reporting */
 261                         if (IS_SET(MODE_MOUSEX10))
 262                                 return;
 263                         if (button == 64 || button == 65)
 264                                 return;
 265                 }
 266         }
 267
 268         if (!IS_SET(MODE_MOUSEX10)) {
 269                 button += ((state & ShiftMask  ) ? 4  : 0)
 270                         + ((state & Mod4Mask   ) ? 8  : 0)
 271                         + ((state & ControlMask) ? 16 : 0);
 272         }
 273
 274         if (IS_SET(MODE_MOUSESGR)) {
 275                 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
 276                                 button, x+1, y+1,
 277                                 e->xbutton.type == ButtonRelease ? 'm' : 'M');
 278         } else if (x < 223 && y < 223) {
 279                 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
 280                                 32+button, 32+x+1, 32+y+1);
 281         } else {
 282                 return;
 283         }
 284
 285         ttywrite(buf, len);
 286 }
 287
 288 void
 289 bpress(XEvent *e)
 290 {
 291         struct timespec now;
 292         MouseShortcut *ms;
 293
 294         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 295                 mousereport(e);
 296                 return;
 297         }
 298
 299         for (ms = mshortcuts; ms < mshortcuts + mshortcutslen; ms++) {
 300                 if (e->xbutton.button == ms->b
 301                                 && match(ms->mask, e->xbutton.state)) {
 302                         ttysend(ms->s, strlen(ms->s));
 303                         return;
 304                 }
 305         }
 306
 307         if (e->xbutton.button == Button1) {
 308                 clock_gettime(CLOCK_MONOTONIC, &now);
 309
 310                 /* Clear previous selection, logically and visually. */
 311                 selclear_(NULL);
 312                 sel.mode = SEL_EMPTY;
 313                 sel.type = SEL_REGULAR;
 314                 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
 315                 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
 316
 317                 /*
 318                  * If the user clicks below predefined timeouts specific
 319                  * snapping behaviour is exposed.
 320                  */
 321                 if (TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
 322                         sel.snap = SNAP_LINE;
 323                 } else if (TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
 324                         sel.snap = SNAP_WORD;
 325                 } else {
 326                         sel.snap = 0;
 327                 }
 328                 selnormalize();
 329
 330                 if (sel.snap != 0)
 331                         sel.mode = SEL_READY;
 332                 tsetdirt(sel.nb.y, sel.ne.y);
 333                 sel.tclick2 = sel.tclick1;
 334                 sel.tclick1 = now;
 335         }
 336 }
 337
 338 void
 339 selcopy(Time t)
 340 {
 341         xsetsel(getsel(), t);
 342 }
 343
 344 void
 345 propnotify(XEvent *e)
 346 {
 347         XPropertyEvent *xpev;
 348         Atom clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 349
 350         xpev = &e->xproperty;
 351         if (xpev->state == PropertyNewValue &&
 352                         (xpev->atom == XA_PRIMARY ||
 353                          xpev->atom == clipboard)) {
 354                 selnotify(e);
 355         }
 356 }
 357
 358 void
 359 selnotify(XEvent *e)
 360 {
 361         ulong nitems, ofs, rem;
 362         int format;
 363         uchar *data, *last, *repl;
 364         Atom type, incratom, property;
 365
 366         incratom = XInternAtom(xw.dpy, "INCR", 0);
 367
 368         ofs = 0;
 369         if (e->type == SelectionNotify) {
 370                 property = e->xselection.property;
 371         } else if(e->type == PropertyNotify) {
 372                 property = e->xproperty.atom;
 373         } else {
 374                 return;
 375         }
 376         if (property == None)
 377                 return;
 378
 379         do {
 380                 if (XGetWindowProperty(xw.dpy, xw.win, property, ofs,
 381                                         BUFSIZ/4, False, AnyPropertyType,
 382                                         &type, &format, &nitems, &rem,
 383                                         &data)) {
 384                         fprintf(stderr, "Clipboard allocation failed\n");
 385                         return;
 386                 }
 387
 388                 if (e->type == PropertyNotify && nitems == 0 && rem == 0) {
 389                         /*
 390                          * If there is some PropertyNotify with no data, then
 391                          * this is the signal of the selection owner that all
 392                          * data has been transferred. We won't need to receive
 393                          * PropertyNotify events anymore.
 394                          */
 395                         MODBIT(xw.attrs.event_mask, 0, PropertyChangeMask);
 396                         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
 397                                         &xw.attrs);
 398                 }
 399
 400                 if (type == incratom) {
 401                         /*
 402                          * Activate the PropertyNotify events so we receive
 403                          * when the selection owner does send us the next
 404                          * chunk of data.
 405                          */
 406                         MODBIT(xw.attrs.event_mask, 1, PropertyChangeMask);
 407                         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
 408                                         &xw.attrs);
 409
 410                         /*
 411                          * Deleting the property is the transfer start signal.
 412                          */
 413                         XDeleteProperty(xw.dpy, xw.win, (int)property);
 414                         continue;
 415                 }
 416
 417                 /*
 418                  * As seen in getsel:
 419                  * Line endings are inconsistent in the terminal and GUI world
 420                  * copy and pasting. When receiving some selection data,
 421                  * replace all '\n' with '\r'.
 422                  * FIXME: Fix the computer world.
 423                  */
 424                 repl = data;
 425                 last = data + nitems * format / 8;
 426                 while ((repl = memchr(repl, '\n', last - repl))) {
 427                         *repl++ = '\r';
 428                 }
 429
 430                 if (IS_SET(MODE_BRCKTPASTE) && ofs == 0)
 431                         ttywrite("\033[200~", 6);
 432                 ttysend((char *)data, nitems * format / 8);
 433                 if (IS_SET(MODE_BRCKTPASTE) && rem == 0)
 434                         ttywrite("\033[201~", 6);
 435                 XFree(data);
 436                 /* number of 32-bit chunks returned */
 437                 ofs += nitems * format / 32;
 438         } while (rem > 0);
 439
 440         /*
 441          * Deleting the property again tells the selection owner to send the
 442          * next data chunk in the property.
 443          */
 444         XDeleteProperty(xw.dpy, xw.win, (int)property);
 445 }
 446
 447 void
 448 xselpaste(void)
 449 {
 450         XConvertSelection(xw.dpy, XA_PRIMARY, xsel.xtarget, XA_PRIMARY,
 451                         xw.win, CurrentTime);
 452 }
 453
 454 void
 455 xclipcopy(void)
 456 {
 457         Atom clipboard;
 458
 459         if (sel.clipboard != NULL)
 460                 free(sel.clipboard);
 461
 462         if (sel.primary != NULL) {
 463                 sel.clipboard = xstrdup(sel.primary);
 464                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 465                 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
 466         }
 467 }
 468
 469 void
 470 xclippaste(void)
 471 {
 472         Atom clipboard;
 473
 474         clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 475         XConvertSelection(xw.dpy, clipboard, xsel.xtarget, clipboard,
 476                         xw.win, CurrentTime);
 477 }
 478
 479 void
 480 selclear_(XEvent *e)
 481 {
 482         selclear();
 483 }
 484
 485 void
 486 selrequest(XEvent *e)
 487 {
 488         XSelectionRequestEvent *xsre;
 489         XSelectionEvent xev;
 490         Atom xa_targets, string, clipboard;
 491         char *seltext;
 492
 493         xsre = (XSelectionRequestEvent *) e;
 494         xev.type = SelectionNotify;
 495         xev.requestor = xsre->requestor;
 496         xev.selection = xsre->selection;
 497         xev.target = xsre->target;
 498         xev.time = xsre->time;
 499         if (xsre->property == None)
 500                 xsre->property = xsre->target;
 501
 502         /* reject */
 503         xev.property = None;
 504
 505         xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
 506         if (xsre->target == xa_targets) {
 507                 /* respond with the supported type */
 508                 string = xsel.xtarget;
 509                 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
 510                                 XA_ATOM, 32, PropModeReplace,
 511                                 (uchar *) &string, 1);
 512                 xev.property = xsre->property;
 513         } else if (xsre->target == xsel.xtarget || xsre->target == XA_STRING) {
 514                 /*
 515                  * xith XA_STRING non ascii characters may be incorrect in the
 516                  * requestor. It is not our problem, use utf8.
 517                  */
 518                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 519                 if (xsre->selection == XA_PRIMARY) {
 520                         seltext = sel.primary;
 521                 } else if (xsre->selection == clipboard) {
 522                         seltext = sel.clipboard;
 523                 } else {
 524                         fprintf(stderr,
 525                                 "Unhandled clipboard selection 0x%lx\n",
 526                                 xsre->selection);
 527                         return;
 528                 }
 529                 if (seltext != NULL) {
 530                         XChangeProperty(xsre->display, xsre->requestor,
 531                                         xsre->property, xsre->target,
 532                                         8, PropModeReplace,
 533                                         (uchar *)seltext, strlen(seltext));
 534                         xev.property = xsre->property;
 535                 }
 536         }
 537
 538         /* all done, send a notification to the listener */
 539         if (!XSendEvent(xsre->display, xsre->requestor, 1, 0, (XEvent *) &xev))
 540                 fprintf(stderr, "Error sending SelectionNotify event\n");
 541 }
 542
 543 void
 544 xsetsel(char *str, Time t)
 545 {
 546         free(sel.primary);
 547         sel.primary = str;
 548
 549         XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
 550         if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
 551                 selclear_(NULL);
 552 }
 553
 554 void
 555 brelease(XEvent *e)
 556 {
 557         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 558                 mousereport(e);
 559                 return;
 560         }
 561
 562         if (e->xbutton.button == Button2) {
 563                 xselpaste();
 564         } else if (e->xbutton.button == Button1) {
 565                 if (sel.mode == SEL_READY) {
 566                         getbuttoninfo(e);
 567                         selcopy(e->xbutton.time);
 568                 } else
 569                         selclear_(NULL);
 570                 sel.mode = SEL_IDLE;
 571                 tsetdirt(sel.nb.y, sel.ne.y);
 572         }
 573 }
 574
 575 void
 576 bmotion(XEvent *e)
 577 {
 578         int oldey, oldex, oldsby, oldsey;
 579
 580         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 581                 mousereport(e);
 582                 return;
 583         }
 584
 585         if (!sel.mode)
 586                 return;
 587
 588         sel.mode = SEL_READY;
 589         oldey = sel.oe.y;
 590         oldex = sel.oe.x;
 591         oldsby = sel.nb.y;
 592         oldsey = sel.ne.y;
 593         getbuttoninfo(e);
 594
 595         if (oldey != sel.oe.y || oldex != sel.oe.x)
 596                 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
 597 }
 598
 599 void
 600 xresize(int col, int row)
 601 {
 602         win.tw = MAX(1, col * win.cw);
 603         win.th = MAX(1, row * win.ch);
 604
 605         XFreePixmap(xw.dpy, xw.buf);
 606         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
 607                         DefaultDepth(xw.dpy, xw.scr));
 608         XftDrawChange(xw.draw, xw.buf);
 609         xclear(0, 0, win.w, win.h);
 610
 611         /* resize to new width */
 612         xw.specbuf = xrealloc(xw.specbuf, col * sizeof(GlyphFontSpec));
 613 }
 614
 615 ushort
 616 sixd_to_16bit(int x)
 617 {
 618         return x == 0 ? 0 : 0x3737 + 0x2828 * x;
 619 }
 620
 621 int
 622 xloadcolor(int i, const char *name, Color *ncolor)
 623 {
 624         XRenderColor color = { .alpha = 0xffff };
 625
 626         if (!name) {
 627                 if (BETWEEN(i, 16, 255)) { /* 256 color */
 628                         if (i < 6*6*6+16) { /* same colors as xterm */
 629                                 color.red   = sixd_to_16bit( ((i-16)/36)%6 );
 630                                 color.green = sixd_to_16bit( ((i-16)/6) %6 );
 631                                 color.blue  = sixd_to_16bit( ((i-16)/1) %6 );
 632                         } else { /* greyscale */
 633                                 color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
 634                                 color.green = color.blue = color.red;
 635                         }
 636                         return XftColorAllocValue(xw.dpy, xw.vis,
 637                                                   xw.cmap, &color, ncolor);
 638                 } else
 639                         name = colorname[i];
 640         }
 641
 642         return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
 643 }
 644
 645 void
 646 xloadcols(void)
 647 {
 648         int i;
 649         static int loaded;
 650         Color *cp;
 651
 652         dc.collen = MAX(colornamelen, 256);
 653         dc.col = xmalloc(dc.collen * sizeof(Color));
 654
 655         if (loaded) {
 656                 for (cp = dc.col; cp < &dc.col[dc.collen]; ++cp)
 657                         XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
 658         }
 659
 660         for (i = 0; i < dc.collen; i++)
 661                 if (!xloadcolor(i, NULL, &dc.col[i])) {
 662                         if (colorname[i])
 663                                 die("Could not allocate color '%s'\n", colorname[i]);
 664                         else
 665                                 die("Could not allocate color %d\n", i);
 666                 }
 667         loaded = 1;
 668 }
 669
 670 int
 671 xsetcolorname(int x, const char *name)
 672 {
 673         Color ncolor;
 674
 675         if (!BETWEEN(x, 0, dc.collen))
 676                 return 1;
 677
 678
 679         if (!xloadcolor(x, name, &ncolor))
 680                 return 1;
 681
 682         XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
 683         dc.col[x] = ncolor;
 684
 685         return 0;
 686 }
 687
 688 /*
 689  * Absolute coordinates.
 690  */
 691 void
 692 xclear(int x1, int y1, int x2, int y2)
 693 {
 694         XftDrawRect(xw.draw,
 695                         &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
 696                         x1, y1, x2-x1, y2-y1);
 697 }
 698
 699 void
 700 xhints(void)
 701 {
 702         XClassHint class = {opt_name ? opt_name : termname,
 703                             opt_class ? opt_class : termname};
 704         XWMHints wm = {.flags = InputHint, .input = 1};
 705         XSizeHints *sizeh = NULL;
 706
 707         sizeh = XAllocSizeHints();
 708
 709         sizeh->flags = PSize | PResizeInc | PBaseSize;
 710         sizeh->height = win.h;
 711         sizeh->width = win.w;
 712         sizeh->height_inc = win.ch;
 713         sizeh->width_inc = win.cw;
 714         sizeh->base_height = 2 * borderpx;
 715         sizeh->base_width = 2 * borderpx;
 716         if (xw.isfixed) {
 717                 sizeh->flags |= PMaxSize | PMinSize;
 718                 sizeh->min_width = sizeh->max_width = win.w;
 719                 sizeh->min_height = sizeh->max_height = win.h;
 720         }
 721         if (xw.gm & (XValue|YValue)) {
 722                 sizeh->flags |= USPosition | PWinGravity;
 723                 sizeh->x = xw.l;
 724                 sizeh->y = xw.t;
 725                 sizeh->win_gravity = xgeommasktogravity(xw.gm);
 726         }
 727
 728         XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
 729                         &class);
 730         XFree(sizeh);
 731 }
 732
 733 int
 734 xgeommasktogravity(int mask)
 735 {
 736         switch (mask & (XNegative|YNegative)) {
 737         case 0:
 738                 return NorthWestGravity;
 739         case XNegative:
 740                 return NorthEastGravity;
 741         case YNegative:
 742                 return SouthWestGravity;
 743         }
 744
 745         return SouthEastGravity;
 746 }
 747
 748 int
 749 xloadfont(Font *f, FcPattern *pattern)
 750 {
 751         FcPattern *configured;
 752         FcPattern *match;
 753         FcResult result;
 754         XGlyphInfo extents;
 755         int wantattr, haveattr;
 756
 757         /*
 758          * Manually configure instead of calling XftMatchFont
 759          * so that we can use the configured pattern for
 760          * "missing glyph" lookups.
 761          */
 762         configured = FcPatternDuplicate(pattern);
 763         if (!configured)
 764                 return 1;
 765
 766         FcConfigSubstitute(NULL, configured, FcMatchPattern);
 767         XftDefaultSubstitute(xw.dpy, xw.scr, configured);
 768
 769         match = FcFontMatch(NULL, configured, &result);
 770         if (!match) {
 771                 FcPatternDestroy(configured);
 772                 return 1;
 773         }
 774
 775         if (!(f->match = XftFontOpenPattern(xw.dpy, match))) {
 776                 FcPatternDestroy(configured);
 777                 FcPatternDestroy(match);
 778                 return 1;
 779         }
 780
 781         if ((XftPatternGetInteger(pattern, "slant", 0, &wantattr) ==
 782             XftResultMatch)) {
 783                 /*
 784                  * Check if xft was unable to find a font with the appropriate
 785                  * slant but gave us one anyway. Try to mitigate.
 786                  */
 787                 if ((XftPatternGetInteger(f->match->pattern, "slant", 0,
 788                     &haveattr) != XftResultMatch) || haveattr < wantattr) {
 789                         f->badslant = 1;
 790                         fputs("st: font slant does not match\n", stderr);
 791                 }
 792         }
 793
 794         if ((XftPatternGetInteger(pattern, "weight", 0, &wantattr) ==
 795             XftResultMatch)) {
 796                 if ((XftPatternGetInteger(f->match->pattern, "weight", 0,
 797                     &haveattr) != XftResultMatch) || haveattr != wantattr) {
 798                         f->badweight = 1;
 799                         fputs("st: font weight does not match\n", stderr);
 800                 }
 801         }
 802
 803         XftTextExtentsUtf8(xw.dpy, f->match,
 804                 (const FcChar8 *) ascii_printable,
 805                 strlen(ascii_printable), &extents);
 806
 807         f->set = NULL;
 808         f->pattern = configured;
 809
 810         f->ascent = f->match->ascent;
 811         f->descent = f->match->descent;
 812         f->lbearing = 0;
 813         f->rbearing = f->match->max_advance_width;
 814
 815         f->height = f->ascent + f->descent;
 816         f->width = DIVCEIL(extents.xOff, strlen(ascii_printable));
 817
 818         return 0;
 819 }
 820
 821 void
 822 xloadfonts(char *fontstr, double fontsize)
 823 {
 824         FcPattern *pattern;
 825         double fontval;
 826         float ceilf(float);
 827
 828         if (fontstr[0] == '-') {
 829                 pattern = XftXlfdParse(fontstr, False, False);
 830         } else {
 831                 pattern = FcNameParse((FcChar8 *)fontstr);
 832         }
 833
 834         if (!pattern)
 835                 die("st: can't open font %s\n", fontstr);
 836
 837         if (fontsize > 1) {
 838                 FcPatternDel(pattern, FC_PIXEL_SIZE);
 839                 FcPatternDel(pattern, FC_SIZE);
 840                 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
 841                 usedfontsize = fontsize;
 842         } else {
 843                 if (FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval) ==
 844                                 FcResultMatch) {
 845                         usedfontsize = fontval;
 846                 } else if (FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval) ==
 847                                 FcResultMatch) {
 848                         usedfontsize = -1;
 849                 } else {
 850                         /*
 851                          * Default font size is 12, if none given. This is to
 852                          * have a known usedfontsize value.
 853                          */
 854                         FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
 855                         usedfontsize = 12;
 856                 }
 857                 defaultfontsize = usedfontsize;
 858         }
 859
 860         if (xloadfont(&dc.font, pattern))
 861                 die("st: can't open font %s\n", fontstr);
 862
 863         if (usedfontsize < 0) {
 864                 FcPatternGetDouble(dc.font.match->pattern,
 865                                    FC_PIXEL_SIZE, 0, &fontval);
 866                 usedfontsize = fontval;
 867                 if (fontsize == 0)
 868                         defaultfontsize = fontval;
 869         }
 870
 871         /* Setting character width and height. */
 872         win.cw = ceilf(dc.font.width * cwscale);
 873         win.ch = ceilf(dc.font.height * chscale);
 874
 875         FcPatternDel(pattern, FC_SLANT);
 876         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
 877         if (xloadfont(&dc.ifont, pattern))
 878                 die("st: can't open font %s\n", fontstr);
 879
 880         FcPatternDel(pattern, FC_WEIGHT);
 881         FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
 882         if (xloadfont(&dc.ibfont, pattern))
 883                 die("st: can't open font %s\n", fontstr);
 884
 885         FcPatternDel(pattern, FC_SLANT);
 886         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
 887         if (xloadfont(&dc.bfont, pattern))
 888                 die("st: can't open font %s\n", fontstr);
 889
 890         FcPatternDestroy(pattern);
 891 }
 892
 893 void
 894 xunloadfont(Font *f)
 895 {
 896         XftFontClose(xw.dpy, f->match);
 897         FcPatternDestroy(f->pattern);
 898         if (f->set)
 899                 FcFontSetDestroy(f->set);
 900 }
 901
 902 void
 903 xunloadfonts(void)
 904 {
 905         /* Free the loaded fonts in the font cache.  */
 906         while (frclen > 0)
 907                 XftFontClose(xw.dpy, frc[--frclen].font);
 908
 909         xunloadfont(&dc.font);
 910         xunloadfont(&dc.bfont);
 911         xunloadfont(&dc.ifont);
 912         xunloadfont(&dc.ibfont);
 913 }
 914
 915 void
 916 xinit(void)
 917 {
 918         XGCValues gcvalues;
 919         Cursor cursor;
 920         Window parent;
 921         pid_t thispid = getpid();
 922         XColor xmousefg, xmousebg;
 923
 924         if (!(xw.dpy = XOpenDisplay(NULL)))
 925                 die("Can't open display\n");
 926         xw.scr = XDefaultScreen(xw.dpy);
 927         xw.vis = XDefaultVisual(xw.dpy, xw.scr);
 928
 929         /* font */
 930         if (!FcInit())
 931                 die("Could not init fontconfig.\n");
 932
 933         usedfont = (opt_font == NULL)? font : opt_font;
 934         xloadfonts(usedfont, 0);
 935
 936         /* colors */
 937         xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
 938         xloadcols();
 939
 940         /* adjust fixed window geometry */
 941         win.w = 2 * borderpx + term.col * win.cw;
 942         win.h = 2 * borderpx + term.row * win.ch;
 943         if (xw.gm & XNegative)
 944                 xw.l += DisplayWidth(xw.dpy, xw.scr) - win.w - 2;
 945         if (xw.gm & YNegative)
 946                 xw.t += DisplayHeight(xw.dpy, xw.scr) - win.h - 2;
 947
 948         /* Events */
 949         xw.attrs.background_pixel = dc.col[defaultbg].pixel;
 950         xw.attrs.border_pixel = dc.col[defaultbg].pixel;
 951         xw.attrs.bit_gravity = NorthWestGravity;
 952         xw.attrs.event_mask = FocusChangeMask | KeyPressMask
 953                 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
 954                 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
 955         xw.attrs.colormap = xw.cmap;
 956
 957         if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
 958                 parent = XRootWindow(xw.dpy, xw.scr);
 959         xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
 960                         win.w, win.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
 961                         xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
 962                         | CWEventMask | CWColormap, &xw.attrs);
 963
 964         memset(&gcvalues, 0, sizeof(gcvalues));
 965         gcvalues.graphics_exposures = False;
 966         dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
 967                         &gcvalues);
 968         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
 969                         DefaultDepth(xw.dpy, xw.scr));
 970         XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
 971         XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, win.w, win.h);
 972
 973         /* font spec buffer */
 974         xw.specbuf = xmalloc(term.col * sizeof(GlyphFontSpec));
 975
 976         /* Xft rendering context */
 977         xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
 978
 979         /* input methods */
 980         if ((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
 981                 XSetLocaleModifiers("@im=local");
 982                 if ((xw.xim =  XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
 983                         XSetLocaleModifiers("@im=");
 984                         if ((xw.xim = XOpenIM(xw.dpy,
 985                                         NULL, NULL, NULL)) == NULL) {
 986                                 die("XOpenIM failed. Could not open input"
 987                                         " device.\n");
 988                         }
 989                 }
 990         }
 991         xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
 992                                            | XIMStatusNothing, XNClientWindow, xw.win,
 993                                            XNFocusWindow, xw.win, NULL);
 994         if (xw.xic == NULL)
 995                 die("XCreateIC failed. Could not obtain input method.\n");
 996
 997         /* white cursor, black outline */
 998         cursor = XCreateFontCursor(xw.dpy, mouseshape);
 999         XDefineCursor(xw.dpy, xw.win, cursor);
1000
1001         if (XParseColor(xw.dpy, xw.cmap, colorname[mousefg], &xmousefg) == 0) {
1002                 xmousefg.red   = 0xffff;
1003                 xmousefg.green = 0xffff;
1004                 xmousefg.blue  = 0xffff;
1005         }
1006
1007         if (XParseColor(xw.dpy, xw.cmap, colorname[mousebg], &xmousebg) == 0) {
1008                 xmousebg.red   = 0x0000;
1009                 xmousebg.green = 0x0000;
1010                 xmousebg.blue  = 0x0000;
1011         }
1012
1013         XRecolorCursor(xw.dpy, cursor, &xmousefg, &xmousebg);
1014
1015         xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
1016         xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
1017         xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
1018         XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
1019
1020         xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
1021         XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
1022                         PropModeReplace, (uchar *)&thispid, 1);
1023
1024         resettitle();
1025         XMapWindow(xw.dpy, xw.win);
1026         xhints();
1027         XSync(xw.dpy, False);
1028
1029         xsel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
1030         if (xsel.xtarget == None)
1031                 xsel.xtarget = XA_STRING;
1032 }
1033
1034 int
1035 xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x, int y)
1036 {
1037         float winx = borderpx + x * win.cw, winy = borderpx + y * win.ch, xp, yp;
1038         ushort mode, prevmode = USHRT_MAX;
1039         Font *font = &dc.font;
1040         int frcflags = FRC_NORMAL;
1041         float runewidth = win.cw;
1042         Rune rune;
1043         FT_UInt glyphidx;
1044         FcResult fcres;
1045         FcPattern *fcpattern, *fontpattern;
1046         FcFontSet *fcsets[] = { NULL };
1047         FcCharSet *fccharset;
1048         int i, f, numspecs = 0;
1049
1050         for (i = 0, xp = winx, yp = winy + font->ascent; i < len; ++i) {
1051                 /* Fetch rune and mode for current glyph. */
1052                 rune = glyphs[i].u;
1053                 mode = glyphs[i].mode;
1054
1055                 /* Skip dummy wide-character spacing. */
1056                 if (mode == ATTR_WDUMMY)
1057                         continue;
1058
1059                 /* Determine font for glyph if different from previous glyph. */
1060                 if (prevmode != mode) {
1061                         prevmode = mode;
1062                         font = &dc.font;
1063                         frcflags = FRC_NORMAL;
1064                         runewidth = win.cw * ((mode & ATTR_WIDE) ? 2.0f : 1.0f);
1065                         if ((mode & ATTR_ITALIC) && (mode & ATTR_BOLD)) {
1066                                 font = &dc.ibfont;
1067                                 frcflags = FRC_ITALICBOLD;
1068                         } else if (mode & ATTR_ITALIC) {
1069                                 font = &dc.ifont;
1070                                 frcflags = FRC_ITALIC;
1071                         } else if (mode & ATTR_BOLD) {
1072                                 font = &dc.bfont;
1073                                 frcflags = FRC_BOLD;
1074                         }
1075                         yp = winy + font->ascent;
1076                 }
1077
1078                 /* Lookup character index with default font. */
1079                 glyphidx = XftCharIndex(xw.dpy, font->match, rune);
1080                 if (glyphidx) {
1081                         specs[numspecs].font = font->match;
1082                         specs[numspecs].glyph = glyphidx;
1083                         specs[numspecs].x = (short)xp;
1084                         specs[numspecs].y = (short)yp;
1085                         xp += runewidth;
1086                         numspecs++;
1087                         continue;
1088                 }
1089
1090                 /* Fallback on font cache, search the font cache for match. */
1091                 for (f = 0; f < frclen; f++) {
1092                         glyphidx = XftCharIndex(xw.dpy, frc[f].font, rune);
1093                         /* Everything correct. */
1094                         if (glyphidx && frc[f].flags == frcflags)
1095                                 break;
1096                         /* We got a default font for a not found glyph. */
1097                         if (!glyphidx && frc[f].flags == frcflags
1098                                         && frc[f].unicodep == rune) {
1099                                 break;
1100                         }
1101                 }
1102
1103                 /* Nothing was found. Use fontconfig to find matching font. */
1104                 if (f >= frclen) {
1105                         if (!font->set)
1106                                 font->set = FcFontSort(0, font->pattern,
1107                                                        1, 0, &fcres);
1108                         fcsets[0] = font->set;
1109
1110                         /*
1111                          * Nothing was found in the cache. Now use
1112                          * some dozen of Fontconfig calls to get the
1113                          * font for one single character.
1114                          *
1115                          * Xft and fontconfig are design failures.
1116                          */
1117                         fcpattern = FcPatternDuplicate(font->pattern);
1118                         fccharset = FcCharSetCreate();
1119
1120                         FcCharSetAddChar(fccharset, rune);
1121                         FcPatternAddCharSet(fcpattern, FC_CHARSET,
1122                                         fccharset);
1123                         FcPatternAddBool(fcpattern, FC_SCALABLE, 1);
1124
1125                         FcConfigSubstitute(0, fcpattern,
1126                                         FcMatchPattern);
1127                         FcDefaultSubstitute(fcpattern);
1128
1129                         fontpattern = FcFontSetMatch(0, fcsets, 1,
1130                                         fcpattern, &fcres);
1131
1132                         /*
1133                          * Overwrite or create the new cache entry.
1134                          */
1135                         if (frclen >= LEN(frc)) {
1136                                 frclen = LEN(frc) - 1;
1137                                 XftFontClose(xw.dpy, frc[frclen].font);
1138                                 frc[frclen].unicodep = 0;
1139                         }
1140
1141                         frc[frclen].font = XftFontOpenPattern(xw.dpy,
1142                                         fontpattern);
1143                         if (!frc[frclen].font)
1144                                 die("XftFontOpenPattern failed seeking fallback font: %s\n",
1145                                         strerror(errno));
1146                         frc[frclen].flags = frcflags;
1147                         frc[frclen].unicodep = rune;
1148
1149                         glyphidx = XftCharIndex(xw.dpy, frc[frclen].font, rune);
1150
1151                         f = frclen;
1152                         frclen++;
1153
1154                         FcPatternDestroy(fcpattern);
1155                         FcCharSetDestroy(fccharset);
1156                 }
1157
1158                 specs[numspecs].font = frc[f].font;
1159                 specs[numspecs].glyph = glyphidx;
1160                 specs[numspecs].x = (short)xp;
1161                 specs[numspecs].y = (short)yp;
1162                 xp += runewidth;
1163                 numspecs++;
1164         }
1165
1166         return numspecs;
1167 }
1168
1169 void
1170 xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, int y)
1171 {
1172         int charlen = len * ((base.mode & ATTR_WIDE) ? 2 : 1);
1173         int winx = borderpx + x * win.cw, winy = borderpx + y * win.ch,
1174             width = charlen * win.cw;
1175         Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
1176         XRenderColor colfg, colbg;
1177         XRectangle r;
1178
1179         /* Fallback on color display for attributes not supported by the font */
1180         if (base.mode & ATTR_ITALIC && base.mode & ATTR_BOLD) {
1181                 if (dc.ibfont.badslant || dc.ibfont.badweight)
1182                         base.fg = defaultattr;
1183         } else if ((base.mode & ATTR_ITALIC && dc.ifont.badslant) ||
1184             (base.mode & ATTR_BOLD && dc.bfont.badweight)) {
1185                 base.fg = defaultattr;
1186         }
1187
1188         if (IS_TRUECOL(base.fg)) {
1189                 colfg.alpha = 0xffff;
1190                 colfg.red = TRUERED(base.fg);
1191                 colfg.green = TRUEGREEN(base.fg);
1192                 colfg.blue = TRUEBLUE(base.fg);
1193                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
1194                 fg = &truefg;
1195         } else {
1196                 fg = &dc.col[base.fg];
1197         }
1198
1199         if (IS_TRUECOL(base.bg)) {
1200                 colbg.alpha = 0xffff;
1201                 colbg.green = TRUEGREEN(base.bg);
1202                 colbg.red = TRUERED(base.bg);
1203                 colbg.blue = TRUEBLUE(base.bg);
1204                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
1205                 bg = &truebg;
1206         } else {
1207                 bg = &dc.col[base.bg];
1208         }
1209
1210         /* Change basic system colors [0-7] to bright system colors [8-15] */
1211         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_BOLD && BETWEEN(base.fg, 0, 7))
1212                 fg = &dc.col[base.fg + 8];
1213
1214         if (IS_SET(MODE_REVERSE)) {
1215                 if (fg == &dc.col[defaultfg]) {
1216                         fg = &dc.col[defaultbg];
1217                 } else {
1218                         colfg.red = ~fg->color.red;
1219                         colfg.green = ~fg->color.green;
1220                         colfg.blue = ~fg->color.blue;
1221                         colfg.alpha = fg->color.alpha;
1222                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
1223                                         &revfg);
1224                         fg = &revfg;
1225                 }
1226
1227                 if (bg == &dc.col[defaultbg]) {
1228                         bg = &dc.col[defaultfg];
1229                 } else {
1230                         colbg.red = ~bg->color.red;
1231                         colbg.green = ~bg->color.green;
1232                         colbg.blue = ~bg->color.blue;
1233                         colbg.alpha = bg->color.alpha;
1234                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
1235                                         &revbg);
1236                         bg = &revbg;
1237                 }
1238         }
1239
1240         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_FAINT) {
1241                 colfg.red = fg->color.red / 2;
1242                 colfg.green = fg->color.green / 2;
1243                 colfg.blue = fg->color.blue / 2;
1244                 colfg.alpha = fg->color.alpha;
1245                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
1246                 fg = &revfg;
1247         }
1248
1249
1250         if (base.mode & ATTR_REVERSE) {
1251                 temp = fg;
1252                 fg = bg;
1253                 bg = temp;
1254         }
1255
1256         if (base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
1257                 fg = bg;
1258
1259         if (base.mode & ATTR_INVISIBLE)
1260                 fg = bg;
1261
1262         /* Intelligent cleaning up of the borders. */
1263         if (x == 0) {
1264                 xclear(0, (y == 0)? 0 : winy, borderpx,
1265                         winy + win.ch + ((y >= term.row-1)? win.h : 0));
1266         }
1267         if (x + charlen >= term.col) {
1268                 xclear(winx + width, (y == 0)? 0 : winy, win.w,
1269                         ((y >= term.row-1)? win.h : (winy + win.ch)));
1270         }
1271         if (y == 0)
1272                 xclear(winx, 0, winx + width, borderpx);
1273         if (y == term.row-1)
1274                 xclear(winx, winy + win.ch, winx + width, win.h);
1275
1276         /* Clean up the region we want to draw to. */
1277         XftDrawRect(xw.draw, bg, winx, winy, width, win.ch);
1278
1279         /* Set the clip region because Xft is sometimes dirty. */
1280         r.x = 0;
1281         r.y = 0;
1282         r.height = win.ch;
1283         r.width = width;
1284         XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
1285
1286         /* Render the glyphs. */
1287         XftDrawGlyphFontSpec(xw.draw, fg, specs, len);
1288
1289         /* Render underline and strikethrough. */
1290         if (base.mode & ATTR_UNDERLINE) {
1291                 XftDrawRect(xw.draw, fg, winx, winy + dc.font.ascent + 1,
1292                                 width, 1);
1293         }
1294
1295         if (base.mode & ATTR_STRUCK) {
1296                 XftDrawRect(xw.draw, fg, winx, winy + 2 * dc.font.ascent / 3,
1297                                 width, 1);
1298         }
1299
1300         /* Reset clip to none. */
1301         XftDrawSetClip(xw.draw, 0);
1302 }
1303
1304 void
1305 xdrawglyph(Glyph g, int x, int y)
1306 {
1307         int numspecs;
1308         XftGlyphFontSpec spec;
1309
1310         numspecs = xmakeglyphfontspecs(&spec, &g, 1, x, y);
1311         xdrawglyphfontspecs(&spec, g, numspecs, x, y);
1312 }
1313
1314 void
1315 xdrawcursor(void)
1316 {
1317         static int oldx = 0, oldy = 0;
1318         int curx;
1319         Glyph g = {' ', ATTR_NULL, defaultbg, defaultcs}, og;
1320         int ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
1321         Color drawcol;
1322
1323         LIMIT(oldx, 0, term.col-1);
1324         LIMIT(oldy, 0, term.row-1);
1325
1326         curx = term.c.x;
1327
1328         /* adjust position if in dummy */
1329         if (term.line[oldy][oldx].mode & ATTR_WDUMMY)
1330                 oldx--;
1331         if (term.line[term.c.y][curx].mode & ATTR_WDUMMY)
1332                 curx--;
1333
1334         /* remove the old cursor */
1335         og = term.line[oldy][oldx];
1336         if (ena_sel && selected(oldx, oldy))
1337                 og.mode ^= ATTR_REVERSE;
1338         xdrawglyph(og, oldx, oldy);
1339
1340         g.u = term.line[term.c.y][term.c.x].u;
1341         g.mode |= term.line[term.c.y][term.c.x].mode &
1342                   (ATTR_BOLD | ATTR_ITALIC | ATTR_UNDERLINE | ATTR_STRUCK);
1343
1344         /*
1345          * Select the right color for the right mode.
1346          */
1347         if (IS_SET(MODE_REVERSE)) {
1348                 g.mode |= ATTR_REVERSE;
1349                 g.bg = defaultfg;
1350                 if (ena_sel && selected(term.c.x, term.c.y)) {
1351                         drawcol = dc.col[defaultcs];
1352                         g.fg = defaultrcs;
1353                 } else {
1354                         drawcol = dc.col[defaultrcs];
1355                         g.fg = defaultcs;
1356                 }
1357         } else {
1358                 if (ena_sel && selected(term.c.x, term.c.y)) {
1359                         drawcol = dc.col[defaultrcs];
1360                         g.fg = defaultfg;
1361                         g.bg = defaultrcs;
1362                 } else {
1363                         drawcol = dc.col[defaultcs];
1364                 }
1365         }
1366
1367         if (IS_SET(MODE_HIDE))
1368                 return;
1369
1370         /* draw the new one */
1371         if (win.state & WIN_FOCUSED) {
1372                 switch (win.cursor) {
1373                 case 7: /* st extension: snowman */
1374                         utf8decode("☃", &g.u, UTF_SIZ);
1375                 case 0: /* Blinking Block */
1376                 case 1: /* Blinking Block (Default) */
1377                 case 2: /* Steady Block */
1378                         g.mode |= term.line[term.c.y][curx].mode & ATTR_WIDE;
1379                         xdrawglyph(g, term.c.x, term.c.y);
1380                         break;
1381                 case 3: /* Blinking Underline */
1382                 case 4: /* Steady Underline */
1383                         XftDrawRect(xw.draw, &drawcol,
1384                                         borderpx + curx * win.cw,
1385                                         borderpx + (term.c.y + 1) * win.ch - \
1386                                                 cursorthickness,
1387                                         win.cw, cursorthickness);
1388                         break;
1389                 case 5: /* Blinking bar */
1390                 case 6: /* Steady bar */
1391                         XftDrawRect(xw.draw, &drawcol,
1392                                         borderpx + curx * win.cw,
1393                                         borderpx + term.c.y * win.ch,
1394                                         cursorthickness, win.ch);
1395                         break;
1396                 }
1397         } else {
1398                 XftDrawRect(xw.draw, &drawcol,
1399                                 borderpx + curx * win.cw,
1400                                 borderpx + term.c.y * win.ch,
1401                                 win.cw - 1, 1);
1402                 XftDrawRect(xw.draw, &drawcol,
1403                                 borderpx + curx * win.cw,
1404                                 borderpx + term.c.y * win.ch,
1405                                 1, win.ch - 1);
1406                 XftDrawRect(xw.draw, &drawcol,
1407                                 borderpx + (curx + 1) * win.cw - 1,
1408                                 borderpx + term.c.y * win.ch,
1409                                 1, win.ch - 1);
1410                 XftDrawRect(xw.draw, &drawcol,
1411                                 borderpx + curx * win.cw,
1412                                 borderpx + (term.c.y + 1) * win.ch - 1,
1413                                 win.cw, 1);
1414         }
1415         oldx = curx, oldy = term.c.y;
1416 }
1417
1418 void
1419 xsetenv(void)
1420 {
1421         char buf[sizeof(long) * 8 + 1];
1422
1423         snprintf(buf, sizeof(buf), "%lu", xw.win);
1424         setenv("WINDOWID", buf, 1);
1425 }
1426
1427 void
1428 xsettitle(char *p)
1429 {
1430         XTextProperty prop;
1431
1432         Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
1433                         &prop);
1434         XSetWMName(xw.dpy, xw.win, &prop);
1435         XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
1436         XFree(prop.value);
1437 }
1438
1439 void
1440 draw(void)
1441 {
1442         drawregion(0, 0, term.col, term.row);
1443         XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, win.w,
1444                         win.h, 0, 0);
1445         XSetForeground(xw.dpy, dc.gc,
1446                         dc.col[IS_SET(MODE_REVERSE)?
1447                                 defaultfg : defaultbg].pixel);
1448 }
1449
1450 void
1451 drawregion(int x1, int y1, int x2, int y2)
1452 {
1453         int i, x, y, ox, numspecs;
1454         Glyph base, new;
1455         XftGlyphFontSpec *specs;
1456         int ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
1457
1458         if (!(win.state & WIN_VISIBLE))
1459                 return;
1460
1461         for (y = y1; y < y2; y++) {
1462                 if (!term.dirty[y])
1463                         continue;
1464
1465                 term.dirty[y] = 0;
1466
1467                 specs = xw.specbuf;
1468                 numspecs = xmakeglyphfontspecs(specs, &term.line[y][x1], x2 - x1, x1, y);
1469
1470                 i = ox = 0;
1471                 for (x = x1; x < x2 && i < numspecs; x++) {
1472                         new = term.line[y][x];
1473                         if (new.mode == ATTR_WDUMMY)
1474                                 continue;
1475                         if (ena_sel && selected(x, y))
1476                                 new.mode ^= ATTR_REVERSE;
1477                         if (i > 0 && ATTRCMP(base, new)) {
1478                                 xdrawglyphfontspecs(specs, base, i, ox, y);
1479                                 specs += i;
1480                                 numspecs -= i;
1481                                 i = 0;
1482                         }
1483                         if (i == 0) {
1484                                 ox = x;
1485                                 base = new;
1486                         }
1487                         i++;
1488                 }
1489                 if (i > 0)
1490                         xdrawglyphfontspecs(specs, base, i, ox, y);
1491         }
1492         xdrawcursor();
1493 }
1494
1495 void
1496 expose(XEvent *ev)
1497 {
1498         redraw();
1499 }
1500
1501 void
1502 visibility(XEvent *ev)
1503 {
1504         XVisibilityEvent *e = &ev->xvisibility;
1505
1506         MODBIT(win.state, e->state != VisibilityFullyObscured, WIN_VISIBLE);
1507 }
1508
1509 void
1510 unmap(XEvent *ev)
1511 {
1512         win.state &= ~WIN_VISIBLE;
1513 }
1514
1515 void
1516 xsetpointermotion(int set)
1517 {
1518         MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
1519         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
1520 }
1521
1522 void
1523 xseturgency(int add)
1524 {
1525         XWMHints *h = XGetWMHints(xw.dpy, xw.win);
1526
1527         MODBIT(h->flags, add, XUrgencyHint);
1528         XSetWMHints(xw.dpy, xw.win, h);
1529         XFree(h);
1530 }
1531
1532 void
1533 xbell(void)
1534 {
1535         if (!(win.state & WIN_FOCUSED))
1536                 xseturgency(1);
1537         if (bellvolume)
1538                 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
1539 }
1540
1541 void
1542 focus(XEvent *ev)
1543 {
1544         XFocusChangeEvent *e = &ev->xfocus;
1545
1546         if (e->mode == NotifyGrab)
1547                 return;
1548
1549         if (ev->type == FocusIn) {
1550                 XSetICFocus(xw.xic);
1551                 win.state |= WIN_FOCUSED;
1552                 xseturgency(0);
1553                 if (IS_SET(MODE_FOCUS))
1554                         ttywrite("\033[I", 3);
1555         } else {
1556                 XUnsetICFocus(xw.xic);
1557                 win.state &= ~WIN_FOCUSED;
1558                 if (IS_SET(MODE_FOCUS))
1559                         ttywrite("\033[O", 3);
1560         }
1561 }
1562
1563 void
1564 kpress(XEvent *ev)
1565 {
1566         XKeyEvent *e = &ev->xkey;
1567         KeySym ksym;
1568         char buf[32], *customkey;
1569         int len;
1570         Rune c;
1571         Status status;
1572         Shortcut *bp;
1573
1574         if (IS_SET(MODE_KBDLOCK))
1575                 return;
1576
1577         len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
1578         /* 1. shortcuts */
1579         for (bp = shortcuts; bp < shortcuts + shortcutslen; bp++) {
1580                 if (ksym == bp->keysym && match(bp->mod, e->state)) {
1581                         bp->func(&(bp->arg));
1582                         return;
1583                 }
1584         }
1585
1586         /* 2. custom keys from config.h */
1587         if ((customkey = kmap(ksym, e->state))) {
1588                 ttysend(customkey, strlen(customkey));
1589                 return;
1590         }
1591
1592         /* 3. composed string from input method */
1593         if (len == 0)
1594                 return;
1595         if (len == 1 && e->state & Mod1Mask) {
1596                 if (IS_SET(MODE_8BIT)) {
1597                         if (*buf < 0177) {
1598                                 c = *buf | 0x80;
1599                                 len = utf8encode(c, buf);
1600                         }
1601                 } else {
1602                         buf[1] = buf[0];
1603                         buf[0] = '\033';
1604                         len = 2;
1605                 }
1606         }
1607         ttysend(buf, len);
1608 }
1609
1610
1611 void
1612 cmessage(XEvent *e)
1613 {
1614         /*
1615          * See xembed specs
1616          *  http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
1617          */
1618         if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
1619                 if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
1620                         win.state |= WIN_FOCUSED;
1621                         xseturgency(0);
1622                 } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
1623                         win.state &= ~WIN_FOCUSED;
1624                 }
1625         } else if (e->xclient.data.l[0] == xw.wmdeletewin) {
1626                 /* Send SIGHUP to shell */
1627                 kill(pid, SIGHUP);
1628                 exit(0);
1629         }
1630 }
1631
1632 void
1633 resize(XEvent *e)
1634 {
1635         if (e->xconfigure.width == win.w && e->xconfigure.height == win.h)
1636                 return;
1637
1638         cresize(e->xconfigure.width, e->xconfigure.height);
1639         ttyresize();
1640 }
1641
1642 void
1643 run(void)
1644 {
1645         XEvent ev;
1646         int w = win.w, h = win.h;
1647         fd_set rfd;
1648         int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
1649         struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
1650         long deltatime;
1651
1652         /* Waiting for window mapping */
1653         do {
1654                 XNextEvent(xw.dpy, &ev);
1655                 /*
1656                  * This XFilterEvent call is required because of XOpenIM. It
1657                  * does filter out the key event and some client message for
1658                  * the input method too.
1659                  */
1660                 if (XFilterEvent(&ev, None))
1661                         continue;
1662                 if (ev.type == ConfigureNotify) {
1663                         w = ev.xconfigure.width;
1664                         h = ev.xconfigure.height;
1665                 }
1666         } while (ev.type != MapNotify);
1667
1668         cresize(w, h);
1669         ttynew();
1670         ttyresize();
1671
1672         clock_gettime(CLOCK_MONOTONIC, &last);
1673         lastblink = last;
1674
1675         for (xev = actionfps;;) {
1676                 FD_ZERO(&rfd);
1677                 FD_SET(cmdfd, &rfd);
1678                 FD_SET(xfd, &rfd);
1679
1680                 if (pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
1681                         if (errno == EINTR)
1682                                 continue;
1683                         die("select failed: %s\n", strerror(errno));
1684                 }
1685                 if (FD_ISSET(cmdfd, &rfd)) {
1686                         ttyread();
1687                         if (blinktimeout) {
1688                                 blinkset = tattrset(ATTR_BLINK);
1689                                 if (!blinkset)
1690                                         MODBIT(term.mode, 0, MODE_BLINK);
1691                         }
1692                 }
1693
1694                 if (FD_ISSET(xfd, &rfd))
1695                         xev = actionfps;
1696
1697                 clock_gettime(CLOCK_MONOTONIC, &now);
1698                 drawtimeout.tv_sec = 0;
1699                 drawtimeout.tv_nsec =  (1000 * 1E6)/ xfps;
1700                 tv = &drawtimeout;
1701
1702                 dodraw = 0;
1703                 if (blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
1704                         tsetdirtattr(ATTR_BLINK);
1705                         term.mode ^= MODE_BLINK;
1706                         lastblink = now;
1707                         dodraw = 1;
1708                 }
1709                 deltatime = TIMEDIFF(now, last);
1710                 if (deltatime > 1000 / (xev ? xfps : actionfps)) {
1711                         dodraw = 1;
1712                         last = now;
1713                 }
1714
1715                 if (dodraw) {
1716                         while (XPending(xw.dpy)) {
1717                                 XNextEvent(xw.dpy, &ev);
1718                                 if (XFilterEvent(&ev, None))
1719                                         continue;
1720                                 if (handler[ev.type])
1721                                         (handler[ev.type])(&ev);
1722                         }
1723
1724                         draw();
1725                         XFlush(xw.dpy);
1726
1727                         if (xev && !FD_ISSET(xfd, &rfd))
1728                                 xev--;
1729                         if (!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
1730                                 if (blinkset) {
1731                                         if (TIMEDIFF(now, lastblink) \
1732                                                         > blinktimeout) {
1733                                                 drawtimeout.tv_nsec = 1000;
1734                                         } else {
1735                                                 drawtimeout.tv_nsec = (1E6 * \
1736                                                         (blinktimeout - \
1737                                                         TIMEDIFF(now,
1738                                                                 lastblink)));
1739                                         }
1740                                         drawtimeout.tv_sec = \
1741                                             drawtimeout.tv_nsec / 1E9;
1742                                         drawtimeout.tv_nsec %= (long)1E9;
1743                                 } else {
1744                                         tv = NULL;
1745                                 }
1746                         }
1747                 }
1748         }
1749 }
1750
1751 void
1752 usage(void)
1753 {
1754         die("usage: %s [-aiv] [-c class] [-f font] [-g geometry]"
1755             " [-n name] [-o file]\n"
1756             "          [-T title] [-t title] [-w windowid]"
1757             " [[-e] command [args ...]]\n"
1758             "       %s [-aiv] [-c class] [-f font] [-g geometry]"
1759             " [-n name] [-o file]\n"
1760             "          [-T title] [-t title] [-w windowid] -l line"
1761             " [stty_args ...]\n", argv0, argv0);
1762 }
1763
1764 int
1765 main(int argc, char *argv[])
1766 {
1767         xw.l = xw.t = 0;
1768         xw.isfixed = False;
1769         win.cursor = cursorshape;
1770
1771         ARGBEGIN {
1772         case 'a':
1773                 allowaltscreen = 0;
1774                 break;
1775         case 'c':
1776                 opt_class = EARGF(usage());
1777                 break;
1778         case 'e':
1779                 if (argc > 0)
1780                         --argc, ++argv;
1781                 goto run;
1782         case 'f':
1783                 opt_font = EARGF(usage());
1784                 break;
1785         case 'g':
1786                 xw.gm = XParseGeometry(EARGF(usage()),
1787                                 &xw.l, &xw.t, &cols, &rows);
1788                 break;
1789         case 'i':
1790                 xw.isfixed = 1;
1791                 break;
1792         case 'o':
1793                 opt_io = EARGF(usage());
1794                 break;
1795         case 'l':
1796                 opt_line = EARGF(usage());
1797                 break;
1798         case 'n':
1799                 opt_name = EARGF(usage());
1800                 break;
1801         case 't':
1802         case 'T':
1803                 opt_title = EARGF(usage());
1804                 break;
1805         case 'w':
1806                 opt_embed = EARGF(usage());
1807                 break;
1808         case 'v':
1809                 die("%s " VERSION " (c) 2010-2016 st engineers\n", argv0);
1810                 break;
1811         default:
1812                 usage();
1813         } ARGEND;
1814
1815 run:
1816         if (argc > 0) {
1817                 /* eat all remaining arguments */
1818                 opt_cmd = argv;
1819                 if (!opt_title && !opt_line)
1820                         opt_title = basename(xstrdup(argv[0]));
1821         }
1822         setlocale(LC_CTYPE, "");
1823         XSetLocaleModifiers("");
1824         tnew(MAX(cols, 1), MAX(rows, 1));
1825         xinit();
1826         xsetenv();
1827         selinit();
1828         run();
1829
1830         return 0;
1831 }