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
  21 #define Glyph Glyph_
  22 #define Font Font_
  23
  24 #include "st.h"
  25 #include "win.h"
  26
  27 /* XEMBED messages */
  28 #define XEMBED_FOCUS_IN  4
  29 #define XEMBED_FOCUS_OUT 5
  30
  31 /* macros */
  32 #define TRUERED(x)              (((x) & 0xff0000) >> 8)
  33 #define TRUEGREEN(x)            (((x) & 0xff00))
  34 #define TRUEBLUE(x)             (((x) & 0xff) << 8)
  35
  36 typedef XftDraw *Draw;
  37 typedef XftColor Color;
  38
  39 /* Purely graphic info */
  40 typedef struct {
  41         Display *dpy;
  42         Colormap cmap;
  43         Window win;
  44         Drawable buf;
  45         Atom xembed, wmdeletewin, netwmname, netwmpid;
  46         XIM xim;
  47         XIC xic;
  48         Draw draw;
  49         Visual *vis;
  50         XSetWindowAttributes attrs;
  51         int scr;
  52         int isfixed; /* is fixed geometry? */
  53         int l, t; /* left and top offset */
  54         int gm; /* geometry mask */
  55 } XWindow;
  56
  57 typedef struct {
  58         Atom xtarget;
  59 } XSelection;
  60
  61 /* Font structure */
  62 typedef struct {
  63         int height;
  64         int width;
  65         int ascent;
  66         int descent;
  67         int badslant;
  68         int badweight;
  69         short lbearing;
  70         short rbearing;
  71         XftFont *match;
  72         FcFontSet *set;
  73         FcPattern *pattern;
  74 } Font;
  75
  76 /* Drawing Context */
  77 typedef struct {
  78         Color *col;
  79         size_t collen;
  80         Font font, bfont, ifont, ibfont;
  81         GC gc;
  82 } DC;
  83
  84 static inline ushort sixd_to_16bit(int);
  85 static int xmakeglyphfontspecs(XftGlyphFontSpec *, const Glyph *, int, int, int);
  86 static void xdrawglyphfontspecs(const XftGlyphFontSpec *, Glyph, int, int, int);
  87 static void xdrawglyph(Glyph, int, int);
  88 static void xclear(int, int, int, int);
  89 static void xdrawcursor(void);
  90 static int xgeommasktogravity(int);
  91 static void xinit(void);
  92 static int xloadfont(Font *, FcPattern *);
  93 static void xloadfonts(char *, double);
  94 static void xunloadfont(Font *);
  95 static void xunloadfonts(void);
  96 static void xsetenv(void);
  97 static void xseturgency(int);
  98
  99 static void expose(XEvent *);
 100 static void visibility(XEvent *);
 101 static void unmap(XEvent *);
 102 static void kpress(XEvent *);
 103 static void cmessage(XEvent *);
 104 static void resize(XEvent *);
 105 static void focus(XEvent *);
 106 static void brelease(XEvent *);
 107 static void bpress(XEvent *);
 108 static void bmotion(XEvent *);
 109 static void propnotify(XEvent *);
 110 static void selnotify(XEvent *);
 111 static void selclear_(XEvent *);
 112 static void selrequest(XEvent *);
 113
 114 static void selcopy(Time);
 115 static void getbuttoninfo(XEvent *);
 116 static void mousereport(XEvent *);
 117
 118 static void run(void);
 119 static void usage(void);
 120
 121 static void (*handler[LASTEvent])(XEvent *) = {
 122         [KeyPress] = kpress,
 123         [ClientMessage] = cmessage,
 124         [ConfigureNotify] = resize,
 125         [VisibilityNotify] = visibility,
 126         [UnmapNotify] = unmap,
 127         [Expose] = expose,
 128         [FocusIn] = focus,
 129         [FocusOut] = focus,
 130         [MotionNotify] = bmotion,
 131         [ButtonPress] = bpress,
 132         [ButtonRelease] = brelease,
 133 /*
 134  * Uncomment if you want the selection to disappear when you select something
 135  * different in another window.
 136  */
 137 /*      [SelectionClear] = selclear_, */
 138         [SelectionNotify] = selnotify,
 139 /*
 140  * PropertyNotify is only turned on when there is some INCR transfer happening
 141  * for the selection retrieval.
 142  */
 143         [PropertyNotify] = propnotify,
 144         [SelectionRequest] = selrequest,
 145 };
 146
 147 /* Globals */
 148 static DC dc;
 149 static XWindow xw;
 150 static XSelection xsel;
 151
 152 /* Font Ring Cache */
 153 enum {
 154         FRC_NORMAL,
 155         FRC_ITALIC,
 156         FRC_BOLD,
 157         FRC_ITALICBOLD
 158 };
 159
 160 typedef struct {
 161         XftFont *font;
 162         int flags;
 163         Rune unicodep;
 164 } Fontcache;
 165
 166 /* Fontcache is an array now. A new font will be appended to the array. */
 167 static Fontcache frc[16];
 168 static int frclen = 0;
 169
 170 void
 171 zoom(const Arg *arg)
 172 {
 173         Arg larg;
 174
 175         larg.f = usedfontsize + arg->f;
 176         zoomabs(&larg);
 177 }
 178
 179 void
 180 zoomabs(const Arg *arg)
 181 {
 182         xunloadfonts();
 183         xloadfonts(usedfont, arg->f);
 184         cresize(0, 0);
 185         ttyresize();
 186         redraw();
 187         xhints();
 188 }
 189
 190 void
 191 zoomreset(const Arg *arg)
 192 {
 193         Arg larg;
 194
 195         if (defaultfontsize > 0) {
 196                 larg.f = defaultfontsize;
 197                 zoomabs(&larg);
 198         }
 199 }
 200
 201 void
 202 getbuttoninfo(XEvent *e)
 203 {
 204         int type;
 205         uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
 206
 207         sel.alt = IS_SET(MODE_ALTSCREEN);
 208
 209         sel.oe.x = x2col(e->xbutton.x);
 210         sel.oe.y = y2row(e->xbutton.y);
 211         selnormalize();
 212
 213         sel.type = SEL_REGULAR;
 214         for (type = 1; type < selmaskslen; ++type) {
 215                 if (match(selmasks[type], state)) {
 216                         sel.type = type;
 217                         break;
 218                 }
 219         }
 220 }
 221
 222 void
 223 mousereport(XEvent *e)
 224 {
 225         int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
 226             button = e->xbutton.button, state = e->xbutton.state,
 227             len;
 228         char buf[40];
 229         static int ox, oy;
 230
 231         /* from urxvt */
 232         if (e->xbutton.type == MotionNotify) {
 233                 if (x == ox && y == oy)
 234                         return;
 235                 if (!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
 236                         return;
 237                 /* MOUSE_MOTION: no reporting if no button is pressed */
 238                 if (IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
 239                         return;
 240
 241                 button = oldbutton + 32;
 242                 ox = x;
 243                 oy = y;
 244         } else {
 245                 if (!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
 246                         button = 3;
 247                 } else {
 248                         button -= Button1;
 249                         if (button >= 3)
 250                                 button += 64 - 3;
 251                 }
 252                 if (e->xbutton.type == ButtonPress) {
 253                         oldbutton = button;
 254                         ox = x;
 255                         oy = y;
 256                 } else if (e->xbutton.type == ButtonRelease) {
 257                         oldbutton = 3;
 258                         /* MODE_MOUSEX10: no button release reporting */
 259                         if (IS_SET(MODE_MOUSEX10))
 260                                 return;
 261                         if (button == 64 || button == 65)
 262                                 return;
 263                 }
 264         }
 265
 266         if (!IS_SET(MODE_MOUSEX10)) {
 267                 button += ((state & ShiftMask  ) ? 4  : 0)
 268                         + ((state & Mod4Mask   ) ? 8  : 0)
 269                         + ((state & ControlMask) ? 16 : 0);
 270         }
 271
 272         if (IS_SET(MODE_MOUSESGR)) {
 273                 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
 274                                 button, x+1, y+1,
 275                                 e->xbutton.type == ButtonRelease ? 'm' : 'M');
 276         } else if (x < 223 && y < 223) {
 277                 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
 278                                 32+button, 32+x+1, 32+y+1);
 279         } else {
 280                 return;
 281         }
 282
 283         ttywrite(buf, len);
 284 }
 285
 286 void
 287 bpress(XEvent *e)
 288 {
 289         struct timespec now;
 290         MouseShortcut *ms;
 291
 292         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 293                 mousereport(e);
 294                 return;
 295         }
 296
 297         for (ms = mshortcuts; ms < mshortcuts + mshortcutslen; ms++) {
 298                 if (e->xbutton.button == ms->b
 299                                 && match(ms->mask, e->xbutton.state)) {
 300                         ttysend(ms->s, strlen(ms->s));
 301                         return;
 302                 }
 303         }
 304
 305         if (e->xbutton.button == Button1) {
 306                 clock_gettime(CLOCK_MONOTONIC, &now);
 307
 308                 /* Clear previous selection, logically and visually. */
 309                 selclear_(NULL);
 310                 sel.mode = SEL_EMPTY;
 311                 sel.type = SEL_REGULAR;
 312                 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
 313                 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
 314
 315                 /*
 316                  * If the user clicks below predefined timeouts specific
 317                  * snapping behaviour is exposed.
 318                  */
 319                 if (TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
 320                         sel.snap = SNAP_LINE;
 321                 } else if (TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
 322                         sel.snap = SNAP_WORD;
 323                 } else {
 324                         sel.snap = 0;
 325                 }
 326                 selnormalize();
 327
 328                 if (sel.snap != 0)
 329                         sel.mode = SEL_READY;
 330                 tsetdirt(sel.nb.y, sel.ne.y);
 331                 sel.tclick2 = sel.tclick1;
 332                 sel.tclick1 = now;
 333         }
 334 }
 335
 336 void
 337 selcopy(Time t)
 338 {
 339         xsetsel(getsel(), t);
 340 }
 341
 342 void
 343 propnotify(XEvent *e)
 344 {
 345         XPropertyEvent *xpev;
 346         Atom clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 347
 348         xpev = &e->xproperty;
 349         if (xpev->state == PropertyNewValue &&
 350                         (xpev->atom == XA_PRIMARY ||
 351                          xpev->atom == clipboard)) {
 352                 selnotify(e);
 353         }
 354 }
 355
 356 void
 357 selnotify(XEvent *e)
 358 {
 359         ulong nitems, ofs, rem;
 360         int format;
 361         uchar *data, *last, *repl;
 362         Atom type, incratom, property;
 363
 364         incratom = XInternAtom(xw.dpy, "INCR", 0);
 365
 366         ofs = 0;
 367         if (e->type == SelectionNotify) {
 368                 property = e->xselection.property;
 369         } else if(e->type == PropertyNotify) {
 370                 property = e->xproperty.atom;
 371         } else {
 372                 return;
 373         }
 374         if (property == None)
 375                 return;
 376
 377         do {
 378                 if (XGetWindowProperty(xw.dpy, xw.win, property, ofs,
 379                                         BUFSIZ/4, False, AnyPropertyType,
 380                                         &type, &format, &nitems, &rem,
 381                                         &data)) {
 382                         fprintf(stderr, "Clipboard allocation failed\n");
 383                         return;
 384                 }
 385
 386                 if (e->type == PropertyNotify && nitems == 0 && rem == 0) {
 387                         /*
 388                          * If there is some PropertyNotify with no data, then
 389                          * this is the signal of the selection owner that all
 390                          * data has been transferred. We won't need to receive
 391                          * PropertyNotify events anymore.
 392                          */
 393                         MODBIT(xw.attrs.event_mask, 0, PropertyChangeMask);
 394                         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
 395                                         &xw.attrs);
 396                 }
 397
 398                 if (type == incratom) {
 399                         /*
 400                          * Activate the PropertyNotify events so we receive
 401                          * when the selection owner does send us the next
 402                          * chunk of data.
 403                          */
 404                         MODBIT(xw.attrs.event_mask, 1, PropertyChangeMask);
 405                         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
 406                                         &xw.attrs);
 407
 408                         /*
 409                          * Deleting the property is the transfer start signal.
 410                          */
 411                         XDeleteProperty(xw.dpy, xw.win, (int)property);
 412                         continue;
 413                 }
 414
 415                 /*
 416                  * As seen in getsel:
 417                  * Line endings are inconsistent in the terminal and GUI world
 418                  * copy and pasting. When receiving some selection data,
 419                  * replace all '\n' with '\r'.
 420                  * FIXME: Fix the computer world.
 421                  */
 422                 repl = data;
 423                 last = data + nitems * format / 8;
 424                 while ((repl = memchr(repl, '\n', last - repl))) {
 425                         *repl++ = '\r';
 426                 }
 427
 428                 if (IS_SET(MODE_BRCKTPASTE) && ofs == 0)
 429                         ttywrite("\033[200~", 6);
 430                 ttysend((char *)data, nitems * format / 8);
 431                 if (IS_SET(MODE_BRCKTPASTE) && rem == 0)
 432                         ttywrite("\033[201~", 6);
 433                 XFree(data);
 434                 /* number of 32-bit chunks returned */
 435                 ofs += nitems * format / 32;
 436         } while (rem > 0);
 437
 438         /*
 439          * Deleting the property again tells the selection owner to send the
 440          * next data chunk in the property.
 441          */
 442         XDeleteProperty(xw.dpy, xw.win, (int)property);
 443 }
 444
 445 void
 446 xselpaste(void)
 447 {
 448         XConvertSelection(xw.dpy, XA_PRIMARY, xsel.xtarget, XA_PRIMARY,
 449                         xw.win, CurrentTime);
 450 }
 451
 452 void
 453 xclipcopy(void)
 454 {
 455         Atom clipboard;
 456
 457         if (sel.clipboard != NULL)
 458                 free(sel.clipboard);
 459
 460         if (sel.primary != NULL) {
 461                 sel.clipboard = xstrdup(sel.primary);
 462                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 463                 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
 464         }
 465 }
 466
 467 void
 468 xclippaste(void)
 469 {
 470         Atom clipboard;
 471
 472         clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 473         XConvertSelection(xw.dpy, clipboard, xsel.xtarget, clipboard,
 474                         xw.win, CurrentTime);
 475 }
 476
 477 void
 478 selclear_(XEvent *e)
 479 {
 480         selclear();
 481 }
 482
 483 void
 484 selrequest(XEvent *e)
 485 {
 486         XSelectionRequestEvent *xsre;
 487         XSelectionEvent xev;
 488         Atom xa_targets, string, clipboard;
 489         char *seltext;
 490
 491         xsre = (XSelectionRequestEvent *) e;
 492         xev.type = SelectionNotify;
 493         xev.requestor = xsre->requestor;
 494         xev.selection = xsre->selection;
 495         xev.target = xsre->target;
 496         xev.time = xsre->time;
 497         if (xsre->property == None)
 498                 xsre->property = xsre->target;
 499
 500         /* reject */
 501         xev.property = None;
 502
 503         xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
 504         if (xsre->target == xa_targets) {
 505                 /* respond with the supported type */
 506                 string = xsel.xtarget;
 507                 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
 508                                 XA_ATOM, 32, PropModeReplace,
 509                                 (uchar *) &string, 1);
 510                 xev.property = xsre->property;
 511         } else if (xsre->target == xsel.xtarget || xsre->target == XA_STRING) {
 512                 /*
 513                  * xith XA_STRING non ascii characters may be incorrect in the
 514                  * requestor. It is not our problem, use utf8.
 515                  */
 516                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 517                 if (xsre->selection == XA_PRIMARY) {
 518                         seltext = sel.primary;
 519                 } else if (xsre->selection == clipboard) {
 520                         seltext = sel.clipboard;
 521                 } else {
 522                         fprintf(stderr,
 523                                 "Unhandled clipboard selection 0x%lx\n",
 524                                 xsre->selection);
 525                         return;
 526                 }
 527                 if (seltext != NULL) {
 528                         XChangeProperty(xsre->display, xsre->requestor,
 529                                         xsre->property, xsre->target,
 530                                         8, PropModeReplace,
 531                                         (uchar *)seltext, strlen(seltext));
 532                         xev.property = xsre->property;
 533                 }
 534         }
 535
 536         /* all done, send a notification to the listener */
 537         if (!XSendEvent(xsre->display, xsre->requestor, 1, 0, (XEvent *) &xev))
 538                 fprintf(stderr, "Error sending SelectionNotify event\n");
 539 }
 540
 541 void
 542 xsetsel(char *str, Time t)
 543 {
 544         free(sel.primary);
 545         sel.primary = str;
 546
 547         XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
 548         if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
 549                 selclear_(NULL);
 550 }
 551
 552 void
 553 brelease(XEvent *e)
 554 {
 555         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 556                 mousereport(e);
 557                 return;
 558         }
 559
 560         if (e->xbutton.button == Button2) {
 561                 xselpaste();
 562         } else if (e->xbutton.button == Button1) {
 563                 if (sel.mode == SEL_READY) {
 564                         getbuttoninfo(e);
 565                         selcopy(e->xbutton.time);
 566                 } else
 567                         selclear_(NULL);
 568                 sel.mode = SEL_IDLE;
 569                 tsetdirt(sel.nb.y, sel.ne.y);
 570         }
 571 }
 572
 573 void
 574 bmotion(XEvent *e)
 575 {
 576         int oldey, oldex, oldsby, oldsey;
 577
 578         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 579                 mousereport(e);
 580                 return;
 581         }
 582
 583         if (!sel.mode)
 584                 return;
 585
 586         sel.mode = SEL_READY;
 587         oldey = sel.oe.y;
 588         oldex = sel.oe.x;
 589         oldsby = sel.nb.y;
 590         oldsey = sel.ne.y;
 591         getbuttoninfo(e);
 592
 593         if (oldey != sel.oe.y || oldex != sel.oe.x)
 594                 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
 595 }
 596
 597 void
 598 xresize(int col, int row)
 599 {
 600         win.tw = MAX(1, col * win.cw);
 601         win.th = MAX(1, row * win.ch);
 602
 603         XFreePixmap(xw.dpy, xw.buf);
 604         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
 605                         DefaultDepth(xw.dpy, xw.scr));
 606         XftDrawChange(xw.draw, xw.buf);
 607         xclear(0, 0, win.w, win.h);
 608 }
 609
 610 ushort
 611 sixd_to_16bit(int x)
 612 {
 613         return x == 0 ? 0 : 0x3737 + 0x2828 * x;
 614 }
 615
 616 int
 617 xloadcolor(int i, const char *name, Color *ncolor)
 618 {
 619         XRenderColor color = { .alpha = 0xffff };
 620
 621         if (!name) {
 622                 if (BETWEEN(i, 16, 255)) { /* 256 color */
 623                         if (i < 6*6*6+16) { /* same colors as xterm */
 624                                 color.red   = sixd_to_16bit( ((i-16)/36)%6 );
 625                                 color.green = sixd_to_16bit( ((i-16)/6) %6 );
 626                                 color.blue  = sixd_to_16bit( ((i-16)/1) %6 );
 627                         } else { /* greyscale */
 628                                 color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
 629                                 color.green = color.blue = color.red;
 630                         }
 631                         return XftColorAllocValue(xw.dpy, xw.vis,
 632                                                   xw.cmap, &color, ncolor);
 633                 } else
 634                         name = colorname[i];
 635         }
 636
 637         return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
 638 }
 639
 640 void
 641 xloadcols(void)
 642 {
 643         int i;
 644         static int loaded;
 645         Color *cp;
 646
 647         dc.collen = MAX(colornamelen, 256);
 648         dc.col = xmalloc(dc.collen * sizeof(Color));
 649
 650         if (loaded) {
 651                 for (cp = dc.col; cp < &dc.col[dc.collen]; ++cp)
 652                         XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
 653         }
 654
 655         for (i = 0; i < dc.collen; i++)
 656                 if (!xloadcolor(i, NULL, &dc.col[i])) {
 657                         if (colorname[i])
 658                                 die("Could not allocate color '%s'\n", colorname[i]);
 659                         else
 660                                 die("Could not allocate color %d\n", i);
 661                 }
 662         loaded = 1;
 663 }
 664
 665 int
 666 xsetcolorname(int x, const char *name)
 667 {
 668         Color ncolor;
 669
 670         if (!BETWEEN(x, 0, dc.collen))
 671                 return 1;
 672
 673
 674         if (!xloadcolor(x, name, &ncolor))
 675                 return 1;
 676
 677         XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
 678         dc.col[x] = ncolor;
 679
 680         return 0;
 681 }
 682
 683 /*
 684  * Absolute coordinates.
 685  */
 686 void
 687 xclear(int x1, int y1, int x2, int y2)
 688 {
 689         XftDrawRect(xw.draw,
 690                         &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
 691                         x1, y1, x2-x1, y2-y1);
 692 }
 693
 694 void
 695 xhints(void)
 696 {
 697         XClassHint class = {opt_name ? opt_name : termname,
 698                             opt_class ? opt_class : termname};
 699         XWMHints wm = {.flags = InputHint, .input = 1};
 700         XSizeHints *sizeh = NULL;
 701
 702         sizeh = XAllocSizeHints();
 703
 704         sizeh->flags = PSize | PResizeInc | PBaseSize;
 705         sizeh->height = win.h;
 706         sizeh->width = win.w;
 707         sizeh->height_inc = win.ch;
 708         sizeh->width_inc = win.cw;
 709         sizeh->base_height = 2 * borderpx;
 710         sizeh->base_width = 2 * borderpx;
 711         if (xw.isfixed) {
 712                 sizeh->flags |= PMaxSize | PMinSize;
 713                 sizeh->min_width = sizeh->max_width = win.w;
 714                 sizeh->min_height = sizeh->max_height = win.h;
 715         }
 716         if (xw.gm & (XValue|YValue)) {
 717                 sizeh->flags |= USPosition | PWinGravity;
 718                 sizeh->x = xw.l;
 719                 sizeh->y = xw.t;
 720                 sizeh->win_gravity = xgeommasktogravity(xw.gm);
 721         }
 722
 723         XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
 724                         &class);
 725         XFree(sizeh);
 726 }
 727
 728 int
 729 xgeommasktogravity(int mask)
 730 {
 731         switch (mask & (XNegative|YNegative)) {
 732         case 0:
 733                 return NorthWestGravity;
 734         case XNegative:
 735                 return NorthEastGravity;
 736         case YNegative:
 737                 return SouthWestGravity;
 738         }
 739
 740         return SouthEastGravity;
 741 }
 742
 743 int
 744 xloadfont(Font *f, FcPattern *pattern)
 745 {
 746         FcPattern *configured;
 747         FcPattern *match;
 748         FcResult result;
 749         XGlyphInfo extents;
 750         int wantattr, haveattr;
 751
 752         /*
 753          * Manually configure instead of calling XftMatchFont
 754          * so that we can use the configured pattern for
 755          * "missing glyph" lookups.
 756          */
 757         configured = FcPatternDuplicate(pattern);
 758         if (!configured)
 759                 return 1;
 760
 761         FcConfigSubstitute(NULL, configured, FcMatchPattern);
 762         XftDefaultSubstitute(xw.dpy, xw.scr, configured);
 763
 764         match = FcFontMatch(NULL, configured, &result);
 765         if (!match) {
 766                 FcPatternDestroy(configured);
 767                 return 1;
 768         }
 769
 770         if (!(f->match = XftFontOpenPattern(xw.dpy, match))) {
 771                 FcPatternDestroy(configured);
 772                 FcPatternDestroy(match);
 773                 return 1;
 774         }
 775
 776         if ((XftPatternGetInteger(pattern, "slant", 0, &wantattr) ==
 777             XftResultMatch)) {
 778                 /*
 779                  * Check if xft was unable to find a font with the appropriate
 780                  * slant but gave us one anyway. Try to mitigate.
 781                  */
 782                 if ((XftPatternGetInteger(f->match->pattern, "slant", 0,
 783                     &haveattr) != XftResultMatch) || haveattr < wantattr) {
 784                         f->badslant = 1;
 785                         fputs("st: font slant does not match\n", stderr);
 786                 }
 787         }
 788
 789         if ((XftPatternGetInteger(pattern, "weight", 0, &wantattr) ==
 790             XftResultMatch)) {
 791                 if ((XftPatternGetInteger(f->match->pattern, "weight", 0,
 792                     &haveattr) != XftResultMatch) || haveattr != wantattr) {
 793                         f->badweight = 1;
 794                         fputs("st: font weight does not match\n", stderr);
 795                 }
 796         }
 797
 798         XftTextExtentsUtf8(xw.dpy, f->match,
 799                 (const FcChar8 *) ascii_printable,
 800                 strlen(ascii_printable), &extents);
 801
 802         f->set = NULL;
 803         f->pattern = configured;
 804
 805         f->ascent = f->match->ascent;
 806         f->descent = f->match->descent;
 807         f->lbearing = 0;
 808         f->rbearing = f->match->max_advance_width;
 809
 810         f->height = f->ascent + f->descent;
 811         f->width = DIVCEIL(extents.xOff, strlen(ascii_printable));
 812
 813         return 0;
 814 }
 815
 816 void
 817 xloadfonts(char *fontstr, double fontsize)
 818 {
 819         FcPattern *pattern;
 820         double fontval;
 821         float ceilf(float);
 822
 823         if (fontstr[0] == '-') {
 824                 pattern = XftXlfdParse(fontstr, False, False);
 825         } else {
 826                 pattern = FcNameParse((FcChar8 *)fontstr);
 827         }
 828
 829         if (!pattern)
 830                 die("st: can't open font %s\n", fontstr);
 831
 832         if (fontsize > 1) {
 833                 FcPatternDel(pattern, FC_PIXEL_SIZE);
 834                 FcPatternDel(pattern, FC_SIZE);
 835                 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
 836                 usedfontsize = fontsize;
 837         } else {
 838                 if (FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval) ==
 839                                 FcResultMatch) {
 840                         usedfontsize = fontval;
 841                 } else if (FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval) ==
 842                                 FcResultMatch) {
 843                         usedfontsize = -1;
 844                 } else {
 845                         /*
 846                          * Default font size is 12, if none given. This is to
 847                          * have a known usedfontsize value.
 848                          */
 849                         FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
 850                         usedfontsize = 12;
 851                 }
 852                 defaultfontsize = usedfontsize;
 853         }
 854
 855         if (xloadfont(&dc.font, pattern))
 856                 die("st: can't open font %s\n", fontstr);
 857
 858         if (usedfontsize < 0) {
 859                 FcPatternGetDouble(dc.font.match->pattern,
 860                                    FC_PIXEL_SIZE, 0, &fontval);
 861                 usedfontsize = fontval;
 862                 if (fontsize == 0)
 863                         defaultfontsize = fontval;
 864         }
 865
 866         /* Setting character width and height. */
 867         win.cw = ceilf(dc.font.width * cwscale);
 868         win.ch = ceilf(dc.font.height * chscale);
 869
 870         FcPatternDel(pattern, FC_SLANT);
 871         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
 872         if (xloadfont(&dc.ifont, pattern))
 873                 die("st: can't open font %s\n", fontstr);
 874
 875         FcPatternDel(pattern, FC_WEIGHT);
 876         FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
 877         if (xloadfont(&dc.ibfont, pattern))
 878                 die("st: can't open font %s\n", fontstr);
 879
 880         FcPatternDel(pattern, FC_SLANT);
 881         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
 882         if (xloadfont(&dc.bfont, pattern))
 883                 die("st: can't open font %s\n", fontstr);
 884
 885         FcPatternDestroy(pattern);
 886 }
 887
 888 void
 889 xunloadfont(Font *f)
 890 {
 891         XftFontClose(xw.dpy, f->match);
 892         FcPatternDestroy(f->pattern);
 893         if (f->set)
 894                 FcFontSetDestroy(f->set);
 895 }
 896
 897 void
 898 xunloadfonts(void)
 899 {
 900         /* Free the loaded fonts in the font cache.  */
 901         while (frclen > 0)
 902                 XftFontClose(xw.dpy, frc[--frclen].font);
 903
 904         xunloadfont(&dc.font);
 905         xunloadfont(&dc.bfont);
 906         xunloadfont(&dc.ifont);
 907         xunloadfont(&dc.ibfont);
 908 }
 909
 910 void
 911 xinit(void)
 912 {
 913         XGCValues gcvalues;
 914         Cursor cursor;
 915         Window parent;
 916         pid_t thispid = getpid();
 917         XColor xmousefg, xmousebg;
 918
 919         if (!(xw.dpy = XOpenDisplay(NULL)))
 920                 die("Can't open display\n");
 921         xw.scr = XDefaultScreen(xw.dpy);
 922         xw.vis = XDefaultVisual(xw.dpy, xw.scr);
 923
 924         /* font */
 925         if (!FcInit())
 926                 die("Could not init fontconfig.\n");
 927
 928         usedfont = (opt_font == NULL)? font : opt_font;
 929         xloadfonts(usedfont, 0);
 930
 931         /* colors */
 932         xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
 933         xloadcols();
 934
 935         /* adjust fixed window geometry */
 936         win.w = 2 * borderpx + term.col * win.cw;
 937         win.h = 2 * borderpx + term.row * win.ch;
 938         if (xw.gm & XNegative)
 939                 xw.l += DisplayWidth(xw.dpy, xw.scr) - win.w - 2;
 940         if (xw.gm & YNegative)
 941                 xw.t += DisplayHeight(xw.dpy, xw.scr) - win.h - 2;
 942
 943         /* Events */
 944         xw.attrs.background_pixel = dc.col[defaultbg].pixel;
 945         xw.attrs.border_pixel = dc.col[defaultbg].pixel;
 946         xw.attrs.bit_gravity = NorthWestGravity;
 947         xw.attrs.event_mask = FocusChangeMask | KeyPressMask
 948                 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
 949                 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
 950         xw.attrs.colormap = xw.cmap;
 951
 952         if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
 953                 parent = XRootWindow(xw.dpy, xw.scr);
 954         xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
 955                         win.w, win.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
 956                         xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
 957                         | CWEventMask | CWColormap, &xw.attrs);
 958
 959         memset(&gcvalues, 0, sizeof(gcvalues));
 960         gcvalues.graphics_exposures = False;
 961         dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
 962                         &gcvalues);
 963         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
 964                         DefaultDepth(xw.dpy, xw.scr));
 965         XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
 966         XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, win.w, win.h);
 967
 968         /* Xft rendering context */
 969         xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
 970
 971         /* input methods */
 972         if ((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
 973                 XSetLocaleModifiers("@im=local");
 974                 if ((xw.xim =  XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
 975                         XSetLocaleModifiers("@im=");
 976                         if ((xw.xim = XOpenIM(xw.dpy,
 977                                         NULL, NULL, NULL)) == NULL) {
 978                                 die("XOpenIM failed. Could not open input"
 979                                         " device.\n");
 980                         }
 981                 }
 982         }
 983         xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
 984                                            | XIMStatusNothing, XNClientWindow, xw.win,
 985                                            XNFocusWindow, xw.win, NULL);
 986         if (xw.xic == NULL)
 987                 die("XCreateIC failed. Could not obtain input method.\n");
 988
 989         /* white cursor, black outline */
 990         cursor = XCreateFontCursor(xw.dpy, mouseshape);
 991         XDefineCursor(xw.dpy, xw.win, cursor);
 992
 993         if (XParseColor(xw.dpy, xw.cmap, colorname[mousefg], &xmousefg) == 0) {
 994                 xmousefg.red   = 0xffff;
 995                 xmousefg.green = 0xffff;
 996                 xmousefg.blue  = 0xffff;
 997         }
 998
 999         if (XParseColor(xw.dpy, xw.cmap, colorname[mousebg], &xmousebg) == 0) {
1000                 xmousebg.red   = 0x0000;
1001                 xmousebg.green = 0x0000;
1002                 xmousebg.blue  = 0x0000;
1003         }
1004
1005         XRecolorCursor(xw.dpy, cursor, &xmousefg, &xmousebg);
1006
1007         xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
1008         xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
1009         xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
1010         XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
1011
1012         xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
1013         XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
1014                         PropModeReplace, (uchar *)&thispid, 1);
1015
1016         resettitle();
1017         XMapWindow(xw.dpy, xw.win);
1018         xhints();
1019         XSync(xw.dpy, False);
1020
1021         xsel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
1022         if (xsel.xtarget == None)
1023                 xsel.xtarget = XA_STRING;
1024 }
1025
1026 int
1027 xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x, int y)
1028 {
1029         float winx = borderpx + x * win.cw, winy = borderpx + y * win.ch, xp, yp;
1030         ushort mode, prevmode = USHRT_MAX;
1031         Font *font = &dc.font;
1032         int frcflags = FRC_NORMAL;
1033         float runewidth = win.cw;
1034         Rune rune;
1035         FT_UInt glyphidx;
1036         FcResult fcres;
1037         FcPattern *fcpattern, *fontpattern;
1038         FcFontSet *fcsets[] = { NULL };
1039         FcCharSet *fccharset;
1040         int i, f, numspecs = 0;
1041
1042         for (i = 0, xp = winx, yp = winy + font->ascent; i < len; ++i) {
1043                 /* Fetch rune and mode for current glyph. */
1044                 rune = glyphs[i].u;
1045                 mode = glyphs[i].mode;
1046
1047                 /* Skip dummy wide-character spacing. */
1048                 if (mode == ATTR_WDUMMY)
1049                         continue;
1050
1051                 /* Determine font for glyph if different from previous glyph. */
1052                 if (prevmode != mode) {
1053                         prevmode = mode;
1054                         font = &dc.font;
1055                         frcflags = FRC_NORMAL;
1056                         runewidth = win.cw * ((mode & ATTR_WIDE) ? 2.0f : 1.0f);
1057                         if ((mode & ATTR_ITALIC) && (mode & ATTR_BOLD)) {
1058                                 font = &dc.ibfont;
1059                                 frcflags = FRC_ITALICBOLD;
1060                         } else if (mode & ATTR_ITALIC) {
1061                                 font = &dc.ifont;
1062                                 frcflags = FRC_ITALIC;
1063                         } else if (mode & ATTR_BOLD) {
1064                                 font = &dc.bfont;
1065                                 frcflags = FRC_BOLD;
1066                         }
1067                         yp = winy + font->ascent;
1068                 }
1069
1070                 /* Lookup character index with default font. */
1071                 glyphidx = XftCharIndex(xw.dpy, font->match, rune);
1072                 if (glyphidx) {
1073                         specs[numspecs].font = font->match;
1074                         specs[numspecs].glyph = glyphidx;
1075                         specs[numspecs].x = (short)xp;
1076                         specs[numspecs].y = (short)yp;
1077                         xp += runewidth;
1078                         numspecs++;
1079                         continue;
1080                 }
1081
1082                 /* Fallback on font cache, search the font cache for match. */
1083                 for (f = 0; f < frclen; f++) {
1084                         glyphidx = XftCharIndex(xw.dpy, frc[f].font, rune);
1085                         /* Everything correct. */
1086                         if (glyphidx && frc[f].flags == frcflags)
1087                                 break;
1088                         /* We got a default font for a not found glyph. */
1089                         if (!glyphidx && frc[f].flags == frcflags
1090                                         && frc[f].unicodep == rune) {
1091                                 break;
1092                         }
1093                 }
1094
1095                 /* Nothing was found. Use fontconfig to find matching font. */
1096                 if (f >= frclen) {
1097                         if (!font->set)
1098                                 font->set = FcFontSort(0, font->pattern,
1099                                                        1, 0, &fcres);
1100                         fcsets[0] = font->set;
1101
1102                         /*
1103                          * Nothing was found in the cache. Now use
1104                          * some dozen of Fontconfig calls to get the
1105                          * font for one single character.
1106                          *
1107                          * Xft and fontconfig are design failures.
1108                          */
1109                         fcpattern = FcPatternDuplicate(font->pattern);
1110                         fccharset = FcCharSetCreate();
1111
1112                         FcCharSetAddChar(fccharset, rune);
1113                         FcPatternAddCharSet(fcpattern, FC_CHARSET,
1114                                         fccharset);
1115                         FcPatternAddBool(fcpattern, FC_SCALABLE, 1);
1116
1117                         FcConfigSubstitute(0, fcpattern,
1118                                         FcMatchPattern);
1119                         FcDefaultSubstitute(fcpattern);
1120
1121                         fontpattern = FcFontSetMatch(0, fcsets, 1,
1122                                         fcpattern, &fcres);
1123
1124                         /*
1125                          * Overwrite or create the new cache entry.
1126                          */
1127                         if (frclen >= LEN(frc)) {
1128                                 frclen = LEN(frc) - 1;
1129                                 XftFontClose(xw.dpy, frc[frclen].font);
1130                                 frc[frclen].unicodep = 0;
1131                         }
1132
1133                         frc[frclen].font = XftFontOpenPattern(xw.dpy,
1134                                         fontpattern);
1135                         if (!frc[frclen].font)
1136                                 die("XftFontOpenPattern failed seeking fallback font: %s\n",
1137                                         strerror(errno));
1138                         frc[frclen].flags = frcflags;
1139                         frc[frclen].unicodep = rune;
1140
1141                         glyphidx = XftCharIndex(xw.dpy, frc[frclen].font, rune);
1142
1143                         f = frclen;
1144                         frclen++;
1145
1146                         FcPatternDestroy(fcpattern);
1147                         FcCharSetDestroy(fccharset);
1148                 }
1149
1150                 specs[numspecs].font = frc[f].font;
1151                 specs[numspecs].glyph = glyphidx;
1152                 specs[numspecs].x = (short)xp;
1153                 specs[numspecs].y = (short)yp;
1154                 xp += runewidth;
1155                 numspecs++;
1156         }
1157
1158         return numspecs;
1159 }
1160
1161 void
1162 xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, int y)
1163 {
1164         int charlen = len * ((base.mode & ATTR_WIDE) ? 2 : 1);
1165         int winx = borderpx + x * win.cw, winy = borderpx + y * win.ch,
1166             width = charlen * win.cw;
1167         Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
1168         XRenderColor colfg, colbg;
1169         XRectangle r;
1170
1171         /* Fallback on color display for attributes not supported by the font */
1172         if (base.mode & ATTR_ITALIC && base.mode & ATTR_BOLD) {
1173                 if (dc.ibfont.badslant || dc.ibfont.badweight)
1174                         base.fg = defaultattr;
1175         } else if ((base.mode & ATTR_ITALIC && dc.ifont.badslant) ||
1176             (base.mode & ATTR_BOLD && dc.bfont.badweight)) {
1177                 base.fg = defaultattr;
1178         }
1179
1180         if (IS_TRUECOL(base.fg)) {
1181                 colfg.alpha = 0xffff;
1182                 colfg.red = TRUERED(base.fg);
1183                 colfg.green = TRUEGREEN(base.fg);
1184                 colfg.blue = TRUEBLUE(base.fg);
1185                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
1186                 fg = &truefg;
1187         } else {
1188                 fg = &dc.col[base.fg];
1189         }
1190
1191         if (IS_TRUECOL(base.bg)) {
1192                 colbg.alpha = 0xffff;
1193                 colbg.green = TRUEGREEN(base.bg);
1194                 colbg.red = TRUERED(base.bg);
1195                 colbg.blue = TRUEBLUE(base.bg);
1196                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
1197                 bg = &truebg;
1198         } else {
1199                 bg = &dc.col[base.bg];
1200         }
1201
1202         /* Change basic system colors [0-7] to bright system colors [8-15] */
1203         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_BOLD && BETWEEN(base.fg, 0, 7))
1204                 fg = &dc.col[base.fg + 8];
1205
1206         if (IS_SET(MODE_REVERSE)) {
1207                 if (fg == &dc.col[defaultfg]) {
1208                         fg = &dc.col[defaultbg];
1209                 } else {
1210                         colfg.red = ~fg->color.red;
1211                         colfg.green = ~fg->color.green;
1212                         colfg.blue = ~fg->color.blue;
1213                         colfg.alpha = fg->color.alpha;
1214                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
1215                                         &revfg);
1216                         fg = &revfg;
1217                 }
1218
1219                 if (bg == &dc.col[defaultbg]) {
1220                         bg = &dc.col[defaultfg];
1221                 } else {
1222                         colbg.red = ~bg->color.red;
1223                         colbg.green = ~bg->color.green;
1224                         colbg.blue = ~bg->color.blue;
1225                         colbg.alpha = bg->color.alpha;
1226                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
1227                                         &revbg);
1228                         bg = &revbg;
1229                 }
1230         }
1231
1232         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_FAINT) {
1233                 colfg.red = fg->color.red / 2;
1234                 colfg.green = fg->color.green / 2;
1235                 colfg.blue = fg->color.blue / 2;
1236                 colfg.alpha = fg->color.alpha;
1237                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
1238                 fg = &revfg;
1239         }
1240
1241
1242         if (base.mode & ATTR_REVERSE) {
1243                 temp = fg;
1244                 fg = bg;
1245                 bg = temp;
1246         }
1247
1248         if (base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
1249                 fg = bg;
1250
1251         if (base.mode & ATTR_INVISIBLE)
1252                 fg = bg;
1253
1254         /* Intelligent cleaning up of the borders. */
1255         if (x == 0) {
1256                 xclear(0, (y == 0)? 0 : winy, borderpx,
1257                         winy + win.ch + ((y >= term.row-1)? win.h : 0));
1258         }
1259         if (x + charlen >= term.col) {
1260                 xclear(winx + width, (y == 0)? 0 : winy, win.w,
1261                         ((y >= term.row-1)? win.h : (winy + win.ch)));
1262         }
1263         if (y == 0)
1264                 xclear(winx, 0, winx + width, borderpx);
1265         if (y == term.row-1)
1266                 xclear(winx, winy + win.ch, winx + width, win.h);
1267
1268         /* Clean up the region we want to draw to. */
1269         XftDrawRect(xw.draw, bg, winx, winy, width, win.ch);
1270
1271         /* Set the clip region because Xft is sometimes dirty. */
1272         r.x = 0;
1273         r.y = 0;
1274         r.height = win.ch;
1275         r.width = width;
1276         XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
1277
1278         /* Render the glyphs. */
1279         XftDrawGlyphFontSpec(xw.draw, fg, specs, len);
1280
1281         /* Render underline and strikethrough. */
1282         if (base.mode & ATTR_UNDERLINE) {
1283                 XftDrawRect(xw.draw, fg, winx, winy + dc.font.ascent + 1,
1284                                 width, 1);
1285         }
1286
1287         if (base.mode & ATTR_STRUCK) {
1288                 XftDrawRect(xw.draw, fg, winx, winy + 2 * dc.font.ascent / 3,
1289                                 width, 1);
1290         }
1291
1292         /* Reset clip to none. */
1293         XftDrawSetClip(xw.draw, 0);
1294 }
1295
1296 void
1297 xdrawglyph(Glyph g, int x, int y)
1298 {
1299         int numspecs;
1300         XftGlyphFontSpec spec;
1301
1302         numspecs = xmakeglyphfontspecs(&spec, &g, 1, x, y);
1303         xdrawglyphfontspecs(&spec, g, numspecs, x, y);
1304 }
1305
1306 void
1307 xdrawcursor(void)
1308 {
1309         static int oldx = 0, oldy = 0;
1310         int curx;
1311         Glyph g = {' ', ATTR_NULL, defaultbg, defaultcs}, og;
1312         int ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
1313         Color drawcol;
1314
1315         LIMIT(oldx, 0, term.col-1);
1316         LIMIT(oldy, 0, term.row-1);
1317
1318         curx = term.c.x;
1319
1320         /* adjust position if in dummy */
1321         if (term.line[oldy][oldx].mode & ATTR_WDUMMY)
1322                 oldx--;
1323         if (term.line[term.c.y][curx].mode & ATTR_WDUMMY)
1324                 curx--;
1325
1326         /* remove the old cursor */
1327         og = term.line[oldy][oldx];
1328         if (ena_sel && selected(oldx, oldy))
1329                 og.mode ^= ATTR_REVERSE;
1330         xdrawglyph(og, oldx, oldy);
1331
1332         g.u = term.line[term.c.y][term.c.x].u;
1333         g.mode |= term.line[term.c.y][term.c.x].mode &
1334                   (ATTR_BOLD | ATTR_ITALIC | ATTR_UNDERLINE | ATTR_STRUCK);
1335
1336         /*
1337          * Select the right color for the right mode.
1338          */
1339         if (IS_SET(MODE_REVERSE)) {
1340                 g.mode |= ATTR_REVERSE;
1341                 g.bg = defaultfg;
1342                 if (ena_sel && selected(term.c.x, term.c.y)) {
1343                         drawcol = dc.col[defaultcs];
1344                         g.fg = defaultrcs;
1345                 } else {
1346                         drawcol = dc.col[defaultrcs];
1347                         g.fg = defaultcs;
1348                 }
1349         } else {
1350                 if (ena_sel && selected(term.c.x, term.c.y)) {
1351                         drawcol = dc.col[defaultrcs];
1352                         g.fg = defaultfg;
1353                         g.bg = defaultrcs;
1354                 } else {
1355                         drawcol = dc.col[defaultcs];
1356                 }
1357         }
1358
1359         if (IS_SET(MODE_HIDE))
1360                 return;
1361
1362         /* draw the new one */
1363         if (win.state & WIN_FOCUSED) {
1364                 switch (win.cursor) {
1365                 case 7: /* st extension: snowman */
1366                         utf8decode("☃", &g.u, UTF_SIZ);
1367                 case 0: /* Blinking Block */
1368                 case 1: /* Blinking Block (Default) */
1369                 case 2: /* Steady Block */
1370                         g.mode |= term.line[term.c.y][curx].mode & ATTR_WIDE;
1371                         xdrawglyph(g, term.c.x, term.c.y);
1372                         break;
1373                 case 3: /* Blinking Underline */
1374                 case 4: /* Steady Underline */
1375                         XftDrawRect(xw.draw, &drawcol,
1376                                         borderpx + curx * win.cw,
1377                                         borderpx + (term.c.y + 1) * win.ch - \
1378                                                 cursorthickness,
1379                                         win.cw, cursorthickness);
1380                         break;
1381                 case 5: /* Blinking bar */
1382                 case 6: /* Steady bar */
1383                         XftDrawRect(xw.draw, &drawcol,
1384                                         borderpx + curx * win.cw,
1385                                         borderpx + term.c.y * win.ch,
1386                                         cursorthickness, win.ch);
1387                         break;
1388                 }
1389         } else {
1390                 XftDrawRect(xw.draw, &drawcol,
1391                                 borderpx + curx * win.cw,
1392                                 borderpx + term.c.y * win.ch,
1393                                 win.cw - 1, 1);
1394                 XftDrawRect(xw.draw, &drawcol,
1395                                 borderpx + curx * win.cw,
1396                                 borderpx + term.c.y * win.ch,
1397                                 1, win.ch - 1);
1398                 XftDrawRect(xw.draw, &drawcol,
1399                                 borderpx + (curx + 1) * win.cw - 1,
1400                                 borderpx + term.c.y * win.ch,
1401                                 1, win.ch - 1);
1402                 XftDrawRect(xw.draw, &drawcol,
1403                                 borderpx + curx * win.cw,
1404                                 borderpx + (term.c.y + 1) * win.ch - 1,
1405                                 win.cw, 1);
1406         }
1407         oldx = curx, oldy = term.c.y;
1408 }
1409
1410 void
1411 xsetenv(void)
1412 {
1413         char buf[sizeof(long) * 8 + 1];
1414
1415         snprintf(buf, sizeof(buf), "%lu", xw.win);
1416         setenv("WINDOWID", buf, 1);
1417 }
1418
1419 void
1420 xsettitle(char *p)
1421 {
1422         XTextProperty prop;
1423
1424         Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
1425                         &prop);
1426         XSetWMName(xw.dpy, xw.win, &prop);
1427         XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
1428         XFree(prop.value);
1429 }
1430
1431 void
1432 draw(void)
1433 {
1434         drawregion(0, 0, term.col, term.row);
1435         XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, win.w,
1436                         win.h, 0, 0);
1437         XSetForeground(xw.dpy, dc.gc,
1438                         dc.col[IS_SET(MODE_REVERSE)?
1439                                 defaultfg : defaultbg].pixel);
1440 }
1441
1442 void
1443 drawregion(int x1, int y1, int x2, int y2)
1444 {
1445         int i, x, y, ox, numspecs;
1446         Glyph base, new;
1447         XftGlyphFontSpec *specs;
1448         int ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
1449
1450         if (!(win.state & WIN_VISIBLE))
1451                 return;
1452
1453         for (y = y1; y < y2; y++) {
1454                 if (!term.dirty[y])
1455                         continue;
1456
1457                 term.dirty[y] = 0;
1458
1459                 specs = term.specbuf;
1460                 numspecs = xmakeglyphfontspecs(specs, &term.line[y][x1], x2 - x1, x1, y);
1461
1462                 i = ox = 0;
1463                 for (x = x1; x < x2 && i < numspecs; x++) {
1464                         new = term.line[y][x];
1465                         if (new.mode == ATTR_WDUMMY)
1466                                 continue;
1467                         if (ena_sel && selected(x, y))
1468                                 new.mode ^= ATTR_REVERSE;
1469                         if (i > 0 && ATTRCMP(base, new)) {
1470                                 xdrawglyphfontspecs(specs, base, i, ox, y);
1471                                 specs += i;
1472                                 numspecs -= i;
1473                                 i = 0;
1474                         }
1475                         if (i == 0) {
1476                                 ox = x;
1477                                 base = new;
1478                         }
1479                         i++;
1480                 }
1481                 if (i > 0)
1482                         xdrawglyphfontspecs(specs, base, i, ox, y);
1483         }
1484         xdrawcursor();
1485 }
1486
1487 void
1488 expose(XEvent *ev)
1489 {
1490         redraw();
1491 }
1492
1493 void
1494 visibility(XEvent *ev)
1495 {
1496         XVisibilityEvent *e = &ev->xvisibility;
1497
1498         MODBIT(win.state, e->state != VisibilityFullyObscured, WIN_VISIBLE);
1499 }
1500
1501 void
1502 unmap(XEvent *ev)
1503 {
1504         win.state &= ~WIN_VISIBLE;
1505 }
1506
1507 void
1508 xsetpointermotion(int set)
1509 {
1510         MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
1511         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
1512 }
1513
1514 void
1515 xseturgency(int add)
1516 {
1517         XWMHints *h = XGetWMHints(xw.dpy, xw.win);
1518
1519         MODBIT(h->flags, add, XUrgencyHint);
1520         XSetWMHints(xw.dpy, xw.win, h);
1521         XFree(h);
1522 }
1523
1524 void
1525 xbell(void)
1526 {
1527         if (!(win.state & WIN_FOCUSED))
1528                 xseturgency(1);
1529         if (bellvolume)
1530                 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
1531 }
1532
1533 void
1534 focus(XEvent *ev)
1535 {
1536         XFocusChangeEvent *e = &ev->xfocus;
1537
1538         if (e->mode == NotifyGrab)
1539                 return;
1540
1541         if (ev->type == FocusIn) {
1542                 XSetICFocus(xw.xic);
1543                 win.state |= WIN_FOCUSED;
1544                 xseturgency(0);
1545                 if (IS_SET(MODE_FOCUS))
1546                         ttywrite("\033[I", 3);
1547         } else {
1548                 XUnsetICFocus(xw.xic);
1549                 win.state &= ~WIN_FOCUSED;
1550                 if (IS_SET(MODE_FOCUS))
1551                         ttywrite("\033[O", 3);
1552         }
1553 }
1554
1555 void
1556 kpress(XEvent *ev)
1557 {
1558         XKeyEvent *e = &ev->xkey;
1559         KeySym ksym;
1560         char buf[32], *customkey;
1561         int len;
1562         Rune c;
1563         Status status;
1564         Shortcut *bp;
1565
1566         if (IS_SET(MODE_KBDLOCK))
1567                 return;
1568
1569         len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
1570         /* 1. shortcuts */
1571         for (bp = shortcuts; bp < shortcuts + shortcutslen; bp++) {
1572                 if (ksym == bp->keysym && match(bp->mod, e->state)) {
1573                         bp->func(&(bp->arg));
1574                         return;
1575                 }
1576         }
1577
1578         /* 2. custom keys from config.h */
1579         if ((customkey = kmap(ksym, e->state))) {
1580                 ttysend(customkey, strlen(customkey));
1581                 return;
1582         }
1583
1584         /* 3. composed string from input method */
1585         if (len == 0)
1586                 return;
1587         if (len == 1 && e->state & Mod1Mask) {
1588                 if (IS_SET(MODE_8BIT)) {
1589                         if (*buf < 0177) {
1590                                 c = *buf | 0x80;
1591                                 len = utf8encode(c, buf);
1592                         }
1593                 } else {
1594                         buf[1] = buf[0];
1595                         buf[0] = '\033';
1596                         len = 2;
1597                 }
1598         }
1599         ttysend(buf, len);
1600 }
1601
1602
1603 void
1604 cmessage(XEvent *e)
1605 {
1606         /*
1607          * See xembed specs
1608          *  http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
1609          */
1610         if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
1611                 if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
1612                         win.state |= WIN_FOCUSED;
1613                         xseturgency(0);
1614                 } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
1615                         win.state &= ~WIN_FOCUSED;
1616                 }
1617         } else if (e->xclient.data.l[0] == xw.wmdeletewin) {
1618                 /* Send SIGHUP to shell */
1619                 kill(pid, SIGHUP);
1620                 exit(0);
1621         }
1622 }
1623
1624 void
1625 resize(XEvent *e)
1626 {
1627         if (e->xconfigure.width == win.w && e->xconfigure.height == win.h)
1628                 return;
1629
1630         cresize(e->xconfigure.width, e->xconfigure.height);
1631         ttyresize();
1632 }
1633
1634 void
1635 run(void)
1636 {
1637         XEvent ev;
1638         int w = win.w, h = win.h;
1639         fd_set rfd;
1640         int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
1641         struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
1642         long deltatime;
1643
1644         /* Waiting for window mapping */
1645         do {
1646                 XNextEvent(xw.dpy, &ev);
1647                 /*
1648                  * This XFilterEvent call is required because of XOpenIM. It
1649                  * does filter out the key event and some client message for
1650                  * the input method too.
1651                  */
1652                 if (XFilterEvent(&ev, None))
1653                         continue;
1654                 if (ev.type == ConfigureNotify) {
1655                         w = ev.xconfigure.width;
1656                         h = ev.xconfigure.height;
1657                 }
1658         } while (ev.type != MapNotify);
1659
1660         cresize(w, h);
1661         ttynew();
1662         ttyresize();
1663
1664         clock_gettime(CLOCK_MONOTONIC, &last);
1665         lastblink = last;
1666
1667         for (xev = actionfps;;) {
1668                 FD_ZERO(&rfd);
1669                 FD_SET(cmdfd, &rfd);
1670                 FD_SET(xfd, &rfd);
1671
1672                 if (pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
1673                         if (errno == EINTR)
1674                                 continue;
1675                         die("select failed: %s\n", strerror(errno));
1676                 }
1677                 if (FD_ISSET(cmdfd, &rfd)) {
1678                         ttyread();
1679                         if (blinktimeout) {
1680                                 blinkset = tattrset(ATTR_BLINK);
1681                                 if (!blinkset)
1682                                         MODBIT(term.mode, 0, MODE_BLINK);
1683                         }
1684                 }
1685
1686                 if (FD_ISSET(xfd, &rfd))
1687                         xev = actionfps;
1688
1689                 clock_gettime(CLOCK_MONOTONIC, &now);
1690                 drawtimeout.tv_sec = 0;
1691                 drawtimeout.tv_nsec =  (1000 * 1E6)/ xfps;
1692                 tv = &drawtimeout;
1693
1694                 dodraw = 0;
1695                 if (blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
1696                         tsetdirtattr(ATTR_BLINK);
1697                         term.mode ^= MODE_BLINK;
1698                         lastblink = now;
1699                         dodraw = 1;
1700                 }
1701                 deltatime = TIMEDIFF(now, last);
1702                 if (deltatime > 1000 / (xev ? xfps : actionfps)) {
1703                         dodraw = 1;
1704                         last = now;
1705                 }
1706
1707                 if (dodraw) {
1708                         while (XPending(xw.dpy)) {
1709                                 XNextEvent(xw.dpy, &ev);
1710                                 if (XFilterEvent(&ev, None))
1711                                         continue;
1712                                 if (handler[ev.type])
1713                                         (handler[ev.type])(&ev);
1714                         }
1715
1716                         draw();
1717                         XFlush(xw.dpy);
1718
1719                         if (xev && !FD_ISSET(xfd, &rfd))
1720                                 xev--;
1721                         if (!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
1722                                 if (blinkset) {
1723                                         if (TIMEDIFF(now, lastblink) \
1724                                                         > blinktimeout) {
1725                                                 drawtimeout.tv_nsec = 1000;
1726                                         } else {
1727                                                 drawtimeout.tv_nsec = (1E6 * \
1728                                                         (blinktimeout - \
1729                                                         TIMEDIFF(now,
1730                                                                 lastblink)));
1731                                         }
1732                                         drawtimeout.tv_sec = \
1733                                             drawtimeout.tv_nsec / 1E9;
1734                                         drawtimeout.tv_nsec %= (long)1E9;
1735                                 } else {
1736                                         tv = NULL;
1737                                 }
1738                         }
1739                 }
1740         }
1741 }
1742
1743 void
1744 usage(void)
1745 {
1746         die("usage: %s [-aiv] [-c class] [-f font] [-g geometry]"
1747             " [-n name] [-o file]\n"
1748             "          [-T title] [-t title] [-w windowid]"
1749             " [[-e] command [args ...]]\n"
1750             "       %s [-aiv] [-c class] [-f font] [-g geometry]"
1751             " [-n name] [-o file]\n"
1752             "          [-T title] [-t title] [-w windowid] -l line"
1753             " [stty_args ...]\n", argv0, argv0);
1754 }
1755
1756 int
1757 main(int argc, char *argv[])
1758 {
1759         xw.l = xw.t = 0;
1760         xw.isfixed = False;
1761         win.cursor = cursorshape;
1762
1763         ARGBEGIN {
1764         case 'a':
1765                 allowaltscreen = 0;
1766                 break;
1767         case 'c':
1768                 opt_class = EARGF(usage());
1769                 break;
1770         case 'e':
1771                 if (argc > 0)
1772                         --argc, ++argv;
1773                 goto run;
1774         case 'f':
1775                 opt_font = EARGF(usage());
1776                 break;
1777         case 'g':
1778                 xw.gm = XParseGeometry(EARGF(usage()),
1779                                 &xw.l, &xw.t, &cols, &rows);
1780                 break;
1781         case 'i':
1782                 xw.isfixed = 1;
1783                 break;
1784         case 'o':
1785                 opt_io = EARGF(usage());
1786                 break;
1787         case 'l':
1788                 opt_line = EARGF(usage());
1789                 break;
1790         case 'n':
1791                 opt_name = EARGF(usage());
1792                 break;
1793         case 't':
1794         case 'T':
1795                 opt_title = EARGF(usage());
1796                 break;
1797         case 'w':
1798                 opt_embed = EARGF(usage());
1799                 break;
1800         case 'v':
1801                 die("%s " VERSION " (c) 2010-2016 st engineers\n", argv0);
1802                 break;
1803         default:
1804                 usage();
1805         } ARGEND;
1806
1807 run:
1808         if (argc > 0) {
1809                 /* eat all remaining arguments */
1810                 opt_cmd = argv;
1811                 if (!opt_title && !opt_line)
1812                         opt_title = basename(xstrdup(argv[0]));
1813         }
1814         setlocale(LC_CTYPE, "");
1815         XSetLocaleModifiers("");
1816         tnew(MAX(cols, 1), MAX(rows, 1));
1817         xinit();
1818         xsetenv();
1819         selinit();
1820         run();
1821
1822         return 0;
1823 }