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