x.c

   1 /* See LICENSE for license details. */
   2 #include <errno.h>
   3 #include <locale.h>
   4 #include <signal.h>
   5 #include <stdint.h>
   6 #include <sys/select.h>
   7 #include <time.h>
   8 #include <unistd.h>
   9 #include <libgen.h>
  10 #include <X11/Xatom.h>
  11 #include <X11/Xlib.h>
  12 #include <X11/Xutil.h>
  13 #include <X11/cursorfont.h>
  14 #include <X11/keysym.h>
  15 #include <X11/Xft/Xft.h>
  16 #include <X11/XKBlib.h>
  17
  18 static char *argv0;
  19 #include "arg.h"
  20 #include "st.h"
  21 #include "win.h"
  22
  23 /* XEMBED messages */
  24 #define XEMBED_FOCUS_IN  4
  25 #define XEMBED_FOCUS_OUT 5
  26
  27 /* macros */
  28 #define TRUERED(x)              (((x) & 0xff0000) >> 8)
  29 #define TRUEGREEN(x)            (((x) & 0xff00))
  30 #define TRUEBLUE(x)             (((x) & 0xff) << 8)
  31
  32 typedef XftDraw *Draw;
  33 typedef XftColor Color;
  34 typedef XftGlyphFontSpec GlyphFontSpec;
  35
  36 /* Purely graphic info */
  37 typedef struct {
  38         Display *dpy;
  39         Colormap cmap;
  40         Window win;
  41         Drawable buf;
  42         GlyphFontSpec *specbuf; /* font spec buffer used for rendering */
  43         Atom xembed, wmdeletewin, netwmname, netwmpid;
  44         XIM xim;
  45         XIC xic;
  46         Draw draw;
  47         Visual *vis;
  48         XSetWindowAttributes attrs;
  49         int scr;
  50         int isfixed; /* is fixed geometry? */
  51         int l, t; /* left and top offset */
  52         int gm; /* geometry mask */
  53 } XWindow;
  54
  55 typedef struct {
  56         Atom xtarget;
  57 } XSelection;
  58
  59 /* Font structure */
  60 #define Font Font_
  61 typedef struct {
  62         int height;
  63         int width;
  64         int ascent;
  65         int descent;
  66         int badslant;
  67         int badweight;
  68         short lbearing;
  69         short rbearing;
  70         XftFont *match;
  71         FcFontSet *set;
  72         FcPattern *pattern;
  73 } Font;
  74
  75 /* Drawing Context */
  76 typedef struct {
  77         Color *col;
  78         size_t collen;
  79         Font font, bfont, ifont, ibfont;
  80         GC gc;
  81 } DC;
  82
  83 static inline ushort sixd_to_16bit(int);
  84 static int xmakeglyphfontspecs(XftGlyphFontSpec *, const Glyph *, int, int, int);
  85 static void xdrawglyphfontspecs(const XftGlyphFontSpec *, Glyph, int, int, int);
  86 static void xdrawglyph(Glyph, int, int);
  87 static void xclear(int, int, int, int);
  88 static void xdrawcursor(void);
  89 static int xgeommasktogravity(int);
  90 static void xinit(void);
  91 static void cresize(int, int);
  92 static void xresize(int, int);
  93 static int xloadfont(Font *, FcPattern *);
  94 static void xloadfonts(char *, double);
  95 static void xunloadfont(Font *);
  96 static void xunloadfonts(void);
  97 static void xsetenv(void);
  98 static void xseturgency(int);
  99 static int x2col(int);
 100 static int y2row(int);
 101
 102 static void expose(XEvent *);
 103 static void visibility(XEvent *);
 104 static void unmap(XEvent *);
 105 static void kpress(XEvent *);
 106 static void cmessage(XEvent *);
 107 static void resize(XEvent *);
 108 static void focus(XEvent *);
 109 static void brelease(XEvent *);
 110 static void bpress(XEvent *);
 111 static void bmotion(XEvent *);
 112 static void propnotify(XEvent *);
 113 static void selnotify(XEvent *);
 114 static void selclear_(XEvent *);
 115 static void selrequest(XEvent *);
 116 static void selcopy(Time);
 117 static void getbuttoninfo(XEvent *);
 118 static void mousereport(XEvent *);
 119 static char *kmap(KeySym, uint);
 120 static int match(uint, uint);
 121
 122 static void run(void);
 123 static void usage(void);
 124
 125 static void (*handler[LASTEvent])(XEvent *) = {
 126         [KeyPress] = kpress,
 127         [ClientMessage] = cmessage,
 128         [ConfigureNotify] = resize,
 129         [VisibilityNotify] = visibility,
 130         [UnmapNotify] = unmap,
 131         [Expose] = expose,
 132         [FocusIn] = focus,
 133         [FocusOut] = focus,
 134         [MotionNotify] = bmotion,
 135         [ButtonPress] = bpress,
 136         [ButtonRelease] = brelease,
 137 /*
 138  * Uncomment if you want the selection to disappear when you select something
 139  * different in another window.
 140  */
 141 /*      [SelectionClear] = selclear_, */
 142         [SelectionNotify] = selnotify,
 143 /*
 144  * PropertyNotify is only turned on when there is some INCR transfer happening
 145  * for the selection retrieval.
 146  */
 147         [PropertyNotify] = propnotify,
 148         [SelectionRequest] = selrequest,
 149 };
 150
 151 /* Globals */
 152 static DC dc;
 153 static XWindow xw;
 154 static XSelection xsel;
 155
 156 enum window_state {
 157         WIN_VISIBLE = 1,
 158         WIN_FOCUSED = 2
 159 };
 160
 161 /* Font Ring Cache */
 162 enum {
 163         FRC_NORMAL,
 164         FRC_ITALIC,
 165         FRC_BOLD,
 166         FRC_ITALICBOLD
 167 };
 168
 169 typedef struct {
 170         XftFont *font;
 171         int flags;
 172         Rune unicodep;
 173 } Fontcache;
 174
 175 /* Fontcache is an array now. A new font will be appended to the array. */
 176 static Fontcache frc[16];
 177 static int frclen = 0;
 178 static char *usedfont = NULL;
 179 static double usedfontsize = 0;
 180 static double defaultfontsize = 0;
 181
 182 void
 183 zoom(const Arg *arg)
 184 {
 185         Arg larg;
 186
 187         larg.f = usedfontsize + arg->f;
 188         zoomabs(&larg);
 189 }
 190
 191 void
 192 zoomabs(const Arg *arg)
 193 {
 194         xunloadfonts();
 195         xloadfonts(usedfont, arg->f);
 196         cresize(0, 0);
 197         ttyresize(win.tw, win.th);
 198         redraw();
 199         xhints();
 200 }
 201
 202 void
 203 zoomreset(const Arg *arg)
 204 {
 205         Arg larg;
 206
 207         if (defaultfontsize > 0) {
 208                 larg.f = defaultfontsize;
 209                 zoomabs(&larg);
 210         }
 211 }
 212
 213 int
 214 x2col(int x)
 215 {
 216         x -= borderpx;
 217         x /= win.cw;
 218
 219         return LIMIT(x, 0, term.col-1);
 220 }
 221
 222 int
 223 y2row(int y)
 224 {
 225         y -= borderpx;
 226         y /= win.ch;
 227
 228         return LIMIT(y, 0, term.row-1);
 229 }
 230
 231 void
 232 getbuttoninfo(XEvent *e)
 233 {
 234         int type;
 235         uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
 236
 237         sel.alt = IS_SET(MODE_ALTSCREEN);
 238
 239         sel.oe.x = x2col(e->xbutton.x);
 240         sel.oe.y = y2row(e->xbutton.y);
 241         selnormalize();
 242
 243         sel.type = SEL_REGULAR;
 244         for (type = 1; type < selmaskslen; ++type) {
 245                 if (match(selmasks[type], state)) {
 246                         sel.type = type;
 247                         break;
 248                 }
 249         }
 250 }
 251
 252 void
 253 mousereport(XEvent *e)
 254 {
 255         int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
 256             button = e->xbutton.button, state = e->xbutton.state,
 257             len;
 258         char buf[40];
 259         static int ox, oy;
 260
 261         /* from urxvt */
 262         if (e->xbutton.type == MotionNotify) {
 263                 if (x == ox && y == oy)
 264                         return;
 265                 if (!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
 266                         return;
 267                 /* MOUSE_MOTION: no reporting if no button is pressed */
 268                 if (IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
 269                         return;
 270
 271                 button = oldbutton + 32;
 272                 ox = x;
 273                 oy = y;
 274         } else {
 275                 if (!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
 276                         button = 3;
 277                 } else {
 278                         button -= Button1;
 279                         if (button >= 3)
 280                                 button += 64 - 3;
 281                 }
 282                 if (e->xbutton.type == ButtonPress) {
 283                         oldbutton = button;
 284                         ox = x;
 285                         oy = y;
 286                 } else if (e->xbutton.type == ButtonRelease) {
 287                         oldbutton = 3;
 288                         /* MODE_MOUSEX10: no button release reporting */
 289                         if (IS_SET(MODE_MOUSEX10))
 290                                 return;
 291                         if (button == 64 || button == 65)
 292                                 return;
 293                 }
 294         }
 295
 296         if (!IS_SET(MODE_MOUSEX10)) {
 297                 button += ((state & ShiftMask  ) ? 4  : 0)
 298                         + ((state & Mod4Mask   ) ? 8  : 0)
 299                         + ((state & ControlMask) ? 16 : 0);
 300         }
 301
 302         if (IS_SET(MODE_MOUSESGR)) {
 303                 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
 304                                 button, x+1, y+1,
 305                                 e->xbutton.type == ButtonRelease ? 'm' : 'M');
 306         } else if (x < 223 && y < 223) {
 307                 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
 308                                 32+button, 32+x+1, 32+y+1);
 309         } else {
 310                 return;
 311         }
 312
 313         ttywrite(buf, len);
 314 }
 315
 316 void
 317 bpress(XEvent *e)
 318 {
 319         struct timespec now;
 320         MouseShortcut *ms;
 321
 322         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 323                 mousereport(e);
 324                 return;
 325         }
 326
 327         for (ms = mshortcuts; ms < mshortcuts + mshortcutslen; ms++) {
 328                 if (e->xbutton.button == ms->b
 329                                 && match(ms->mask, e->xbutton.state)) {
 330                         ttysend(ms->s, strlen(ms->s));
 331                         return;
 332                 }
 333         }
 334
 335         if (e->xbutton.button == Button1) {
 336                 clock_gettime(CLOCK_MONOTONIC, &now);
 337
 338                 /* Clear previous selection, logically and visually. */
 339                 selclear_(NULL);
 340                 sel.mode = SEL_EMPTY;
 341                 sel.type = SEL_REGULAR;
 342                 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
 343                 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
 344
 345                 /*
 346                  * If the user clicks below predefined timeouts specific
 347                  * snapping behaviour is exposed.
 348                  */
 349                 if (TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
 350                         sel.snap = SNAP_LINE;
 351                 } else if (TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
 352                         sel.snap = SNAP_WORD;
 353                 } else {
 354                         sel.snap = 0;
 355                 }
 356                 selnormalize();
 357
 358                 if (sel.snap != 0)
 359                         sel.mode = SEL_READY;
 360                 tsetdirt(sel.nb.y, sel.ne.y);
 361                 sel.tclick2 = sel.tclick1;
 362                 sel.tclick1 = now;
 363         }
 364 }
 365
 366 void
 367 selcopy(Time t)
 368 {
 369         xsetsel(getsel(), t);
 370 }
 371
 372 void
 373 propnotify(XEvent *e)
 374 {
 375         XPropertyEvent *xpev;
 376         Atom clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 377
 378         xpev = &e->xproperty;
 379         if (xpev->state == PropertyNewValue &&
 380                         (xpev->atom == XA_PRIMARY ||
 381                          xpev->atom == clipboard)) {
 382                 selnotify(e);
 383         }
 384 }
 385
 386 void
 387 selnotify(XEvent *e)
 388 {
 389         ulong nitems, ofs, rem;
 390         int format;
 391         uchar *data, *last, *repl;
 392         Atom type, incratom, property;
 393
 394         incratom = XInternAtom(xw.dpy, "INCR", 0);
 395
 396         ofs = 0;
 397         if (e->type == SelectionNotify) {
 398                 property = e->xselection.property;
 399         } else if(e->type == PropertyNotify) {
 400                 property = e->xproperty.atom;
 401         } else {
 402                 return;
 403         }
 404         if (property == None)
 405                 return;
 406
 407         do {
 408                 if (XGetWindowProperty(xw.dpy, xw.win, property, ofs,
 409                                         BUFSIZ/4, False, AnyPropertyType,
 410                                         &type, &format, &nitems, &rem,
 411                                         &data)) {
 412                         fprintf(stderr, "Clipboard allocation failed\n");
 413                         return;
 414                 }
 415
 416                 if (e->type == PropertyNotify && nitems == 0 && rem == 0) {
 417                         /*
 418                          * If there is some PropertyNotify with no data, then
 419                          * this is the signal of the selection owner that all
 420                          * data has been transferred. We won't need to receive
 421                          * PropertyNotify events anymore.
 422                          */
 423                         MODBIT(xw.attrs.event_mask, 0, PropertyChangeMask);
 424                         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
 425                                         &xw.attrs);
 426                 }
 427
 428                 if (type == incratom) {
 429                         /*
 430                          * Activate the PropertyNotify events so we receive
 431                          * when the selection owner does send us the next
 432                          * chunk of data.
 433                          */
 434                         MODBIT(xw.attrs.event_mask, 1, PropertyChangeMask);
 435                         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
 436                                         &xw.attrs);
 437
 438                         /*
 439                          * Deleting the property is the transfer start signal.
 440                          */
 441                         XDeleteProperty(xw.dpy, xw.win, (int)property);
 442                         continue;
 443                 }
 444
 445                 /*
 446                  * As seen in getsel:
 447                  * Line endings are inconsistent in the terminal and GUI world
 448                  * copy and pasting. When receiving some selection data,
 449                  * replace all '\n' with '\r'.
 450                  * FIXME: Fix the computer world.
 451                  */
 452                 repl = data;
 453                 last = data + nitems * format / 8;
 454                 while ((repl = memchr(repl, '\n', last - repl))) {
 455                         *repl++ = '\r';
 456                 }
 457
 458                 if (IS_SET(MODE_BRCKTPASTE) && ofs == 0)
 459                         ttywrite("\033[200~", 6);
 460                 ttysend((char *)data, nitems * format / 8);
 461                 if (IS_SET(MODE_BRCKTPASTE) && rem == 0)
 462                         ttywrite("\033[201~", 6);
 463                 XFree(data);
 464                 /* number of 32-bit chunks returned */
 465                 ofs += nitems * format / 32;
 466         } while (rem > 0);
 467
 468         /*
 469          * Deleting the property again tells the selection owner to send the
 470          * next data chunk in the property.
 471          */
 472         XDeleteProperty(xw.dpy, xw.win, (int)property);
 473 }
 474
 475 void
 476 xselpaste(void)
 477 {
 478         XConvertSelection(xw.dpy, XA_PRIMARY, xsel.xtarget, XA_PRIMARY,
 479                         xw.win, CurrentTime);
 480 }
 481
 482 void
 483 xclipcopy(void)
 484 {
 485         Atom clipboard;
 486
 487         if (sel.clipboard != NULL)
 488                 free(sel.clipboard);
 489
 490         if (sel.primary != NULL) {
 491                 sel.clipboard = xstrdup(sel.primary);
 492                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 493                 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
 494         }
 495 }
 496
 497 void
 498 xclippaste(void)
 499 {
 500         Atom clipboard;
 501
 502         clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 503         XConvertSelection(xw.dpy, clipboard, xsel.xtarget, clipboard,
 504                         xw.win, CurrentTime);
 505 }
 506
 507 void
 508 selclear_(XEvent *e)
 509 {
 510         selclear();
 511 }
 512
 513 void
 514 selrequest(XEvent *e)
 515 {
 516         XSelectionRequestEvent *xsre;
 517         XSelectionEvent xev;
 518         Atom xa_targets, string, clipboard;
 519         char *seltext;
 520
 521         xsre = (XSelectionRequestEvent *) e;
 522         xev.type = SelectionNotify;
 523         xev.requestor = xsre->requestor;
 524         xev.selection = xsre->selection;
 525         xev.target = xsre->target;
 526         xev.time = xsre->time;
 527         if (xsre->property == None)
 528                 xsre->property = xsre->target;
 529
 530         /* reject */
 531         xev.property = None;
 532
 533         xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
 534         if (xsre->target == xa_targets) {
 535                 /* respond with the supported type */
 536                 string = xsel.xtarget;
 537                 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
 538                                 XA_ATOM, 32, PropModeReplace,
 539                                 (uchar *) &string, 1);
 540                 xev.property = xsre->property;
 541         } else if (xsre->target == xsel.xtarget || xsre->target == XA_STRING) {
 542                 /*
 543                  * xith XA_STRING non ascii characters may be incorrect in the
 544                  * requestor. It is not our problem, use utf8.
 545                  */
 546                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 547                 if (xsre->selection == XA_PRIMARY) {
 548                         seltext = sel.primary;
 549                 } else if (xsre->selection == clipboard) {
 550                         seltext = sel.clipboard;
 551                 } else {
 552                         fprintf(stderr,
 553                                 "Unhandled clipboard selection 0x%lx\n",
 554                                 xsre->selection);
 555                         return;
 556                 }
 557                 if (seltext != NULL) {
 558                         XChangeProperty(xsre->display, xsre->requestor,
 559                                         xsre->property, xsre->target,
 560                                         8, PropModeReplace,
 561                                         (uchar *)seltext, strlen(seltext));
 562                         xev.property = xsre->property;
 563                 }
 564         }
 565
 566         /* all done, send a notification to the listener */
 567         if (!XSendEvent(xsre->display, xsre->requestor, 1, 0, (XEvent *) &xev))
 568                 fprintf(stderr, "Error sending SelectionNotify event\n");
 569 }
 570
 571 void
 572 xsetsel(char *str, Time t)
 573 {
 574         free(sel.primary);
 575         sel.primary = str;
 576
 577         XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
 578         if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
 579                 selclear_(NULL);
 580 }
 581
 582 void
 583 brelease(XEvent *e)
 584 {
 585         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 586                 mousereport(e);
 587                 return;
 588         }
 589
 590         if (e->xbutton.button == Button2) {
 591                 xselpaste();
 592         } else if (e->xbutton.button == Button1) {
 593                 if (sel.mode == SEL_READY) {
 594                         getbuttoninfo(e);
 595                         selcopy(e->xbutton.time);
 596                 } else
 597                         selclear_(NULL);
 598                 sel.mode = SEL_IDLE;
 599                 tsetdirt(sel.nb.y, sel.ne.y);
 600         }
 601 }
 602
 603 void
 604 bmotion(XEvent *e)
 605 {
 606         int oldey, oldex, oldsby, oldsey;
 607
 608         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 609                 mousereport(e);
 610                 return;
 611         }
 612
 613         if (!sel.mode)
 614                 return;
 615
 616         sel.mode = SEL_READY;
 617         oldey = sel.oe.y;
 618         oldex = sel.oe.x;
 619         oldsby = sel.nb.y;
 620         oldsey = sel.ne.y;
 621         getbuttoninfo(e);
 622
 623         if (oldey != sel.oe.y || oldex != sel.oe.x)
 624                 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
 625 }
 626
 627 void
 628 cresize(int width, int height)
 629 {
 630         int col, row;
 631
 632         if (width != 0)
 633                 win.w = width;
 634         if (height != 0)
 635                 win.h = height;
 636
 637         col = (win.w - 2 * borderpx) / win.cw;
 638         row = (win.h - 2 * borderpx) / win.ch;
 639
 640         tresize(col, row);
 641         xresize(col, row);
 642 }
 643
 644 void
 645 xresize(int col, int row)
 646 {
 647         win.tw = MAX(1, col * win.cw);
 648         win.th = MAX(1, row * win.ch);
 649
 650         XFreePixmap(xw.dpy, xw.buf);
 651         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
 652                         DefaultDepth(xw.dpy, xw.scr));
 653         XftDrawChange(xw.draw, xw.buf);
 654         xclear(0, 0, win.w, win.h);
 655
 656         /* resize to new width */
 657         xw.specbuf = xrealloc(xw.specbuf, col * sizeof(GlyphFontSpec));
 658 }
 659
 660 ushort
 661 sixd_to_16bit(int x)
 662 {
 663         return x == 0 ? 0 : 0x3737 + 0x2828 * x;
 664 }
 665
 666 int
 667 xloadcolor(int i, const char *name, Color *ncolor)
 668 {
 669         XRenderColor color = { .alpha = 0xffff };
 670
 671         if (!name) {
 672                 if (BETWEEN(i, 16, 255)) { /* 256 color */
 673                         if (i < 6*6*6+16) { /* same colors as xterm */
 674                                 color.red   = sixd_to_16bit( ((i-16)/36)%6 );
 675                                 color.green = sixd_to_16bit( ((i-16)/6) %6 );
 676                                 color.blue  = sixd_to_16bit( ((i-16)/1) %6 );
 677                         } else { /* greyscale */
 678                                 color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
 679                                 color.green = color.blue = color.red;
 680                         }
 681                         return XftColorAllocValue(xw.dpy, xw.vis,
 682                                                   xw.cmap, &color, ncolor);
 683                 } else
 684                         name = colorname[i];
 685         }
 686
 687         return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
 688 }
 689
 690 void
 691 xloadcols(void)
 692 {
 693         int i;
 694         static int loaded;
 695         Color *cp;
 696
 697         dc.collen = MAX(colornamelen, 256);
 698         dc.col = xmalloc(dc.collen * sizeof(Color));
 699
 700         if (loaded) {
 701                 for (cp = dc.col; cp < &dc.col[dc.collen]; ++cp)
 702                         XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
 703         }
 704
 705         for (i = 0; i < dc.collen; i++)
 706                 if (!xloadcolor(i, NULL, &dc.col[i])) {
 707                         if (colorname[i])
 708                                 die("Could not allocate color '%s'\n", colorname[i]);
 709                         else
 710                                 die("Could not allocate color %d\n", i);
 711                 }
 712         loaded = 1;
 713 }
 714
 715 int
 716 xsetcolorname(int x, const char *name)
 717 {
 718         Color ncolor;
 719
 720         if (!BETWEEN(x, 0, dc.collen))
 721                 return 1;
 722
 723
 724         if (!xloadcolor(x, name, &ncolor))
 725                 return 1;
 726
 727         XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
 728         dc.col[x] = ncolor;
 729
 730         return 0;
 731 }
 732
 733 /*
 734  * Absolute coordinates.
 735  */
 736 void
 737 xclear(int x1, int y1, int x2, int y2)
 738 {
 739         XftDrawRect(xw.draw,
 740                         &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
 741                         x1, y1, x2-x1, y2-y1);
 742 }
 743
 744 void
 745 xhints(void)
 746 {
 747         XClassHint class = {opt_name ? opt_name : termname,
 748                             opt_class ? opt_class : termname};
 749         XWMHints wm = {.flags = InputHint, .input = 1};
 750         XSizeHints *sizeh = NULL;
 751
 752         sizeh = XAllocSizeHints();
 753
 754         sizeh->flags = PSize | PResizeInc | PBaseSize;
 755         sizeh->height = win.h;
 756         sizeh->width = win.w;
 757         sizeh->height_inc = win.ch;
 758         sizeh->width_inc = win.cw;
 759         sizeh->base_height = 2 * borderpx;
 760         sizeh->base_width = 2 * borderpx;
 761         if (xw.isfixed) {
 762                 sizeh->flags |= PMaxSize | PMinSize;
 763                 sizeh->min_width = sizeh->max_width = win.w;
 764                 sizeh->min_height = sizeh->max_height = win.h;
 765         }
 766         if (xw.gm & (XValue|YValue)) {
 767                 sizeh->flags |= USPosition | PWinGravity;
 768                 sizeh->x = xw.l;
 769                 sizeh->y = xw.t;
 770                 sizeh->win_gravity = xgeommasktogravity(xw.gm);
 771         }
 772
 773         XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
 774                         &class);
 775         XFree(sizeh);
 776 }
 777
 778 int
 779 xgeommasktogravity(int mask)
 780 {
 781         switch (mask & (XNegative|YNegative)) {
 782         case 0:
 783                 return NorthWestGravity;
 784         case XNegative:
 785                 return NorthEastGravity;
 786         case YNegative:
 787                 return SouthWestGravity;
 788         }
 789
 790         return SouthEastGravity;
 791 }
 792
 793 int
 794 xloadfont(Font *f, FcPattern *pattern)
 795 {
 796         FcPattern *configured;
 797         FcPattern *match;
 798         FcResult result;
 799         XGlyphInfo extents;
 800         int wantattr, haveattr;
 801
 802         /*
 803          * Manually configure instead of calling XftMatchFont
 804          * so that we can use the configured pattern for
 805          * "missing glyph" lookups.
 806          */
 807         configured = FcPatternDuplicate(pattern);
 808         if (!configured)
 809                 return 1;
 810
 811         FcConfigSubstitute(NULL, configured, FcMatchPattern);
 812         XftDefaultSubstitute(xw.dpy, xw.scr, configured);
 813
 814         match = FcFontMatch(NULL, configured, &result);
 815         if (!match) {
 816                 FcPatternDestroy(configured);
 817                 return 1;
 818         }
 819
 820         if (!(f->match = XftFontOpenPattern(xw.dpy, match))) {
 821                 FcPatternDestroy(configured);
 822                 FcPatternDestroy(match);
 823                 return 1;
 824         }
 825
 826         if ((XftPatternGetInteger(pattern, "slant", 0, &wantattr) ==
 827             XftResultMatch)) {
 828                 /*
 829                  * Check if xft was unable to find a font with the appropriate
 830                  * slant but gave us one anyway. Try to mitigate.
 831                  */
 832                 if ((XftPatternGetInteger(f->match->pattern, "slant", 0,
 833                     &haveattr) != XftResultMatch) || haveattr < wantattr) {
 834                         f->badslant = 1;
 835                         fputs("st: font slant does not match\n", stderr);
 836                 }
 837         }
 838
 839         if ((XftPatternGetInteger(pattern, "weight", 0, &wantattr) ==
 840             XftResultMatch)) {
 841                 if ((XftPatternGetInteger(f->match->pattern, "weight", 0,
 842                     &haveattr) != XftResultMatch) || haveattr != wantattr) {
 843                         f->badweight = 1;
 844                         fputs("st: font weight does not match\n", stderr);
 845                 }
 846         }
 847
 848         XftTextExtentsUtf8(xw.dpy, f->match,
 849                 (const FcChar8 *) ascii_printable,
 850                 strlen(ascii_printable), &extents);
 851
 852         f->set = NULL;
 853         f->pattern = configured;
 854
 855         f->ascent = f->match->ascent;
 856         f->descent = f->match->descent;
 857         f->lbearing = 0;
 858         f->rbearing = f->match->max_advance_width;
 859
 860         f->height = f->ascent + f->descent;
 861         f->width = DIVCEIL(extents.xOff, strlen(ascii_printable));
 862
 863         return 0;
 864 }
 865
 866 void
 867 xloadfonts(char *fontstr, double fontsize)
 868 {
 869         FcPattern *pattern;
 870         double fontval;
 871         float ceilf(float);
 872
 873         if (fontstr[0] == '-') {
 874                 pattern = XftXlfdParse(fontstr, False, False);
 875         } else {
 876                 pattern = FcNameParse((FcChar8 *)fontstr);
 877         }
 878
 879         if (!pattern)
 880                 die("st: can't open font %s\n", fontstr);
 881
 882         if (fontsize > 1) {
 883                 FcPatternDel(pattern, FC_PIXEL_SIZE);
 884                 FcPatternDel(pattern, FC_SIZE);
 885                 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
 886                 usedfontsize = fontsize;
 887         } else {
 888                 if (FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval) ==
 889                                 FcResultMatch) {
 890                         usedfontsize = fontval;
 891                 } else if (FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval) ==
 892                                 FcResultMatch) {
 893                         usedfontsize = -1;
 894                 } else {
 895                         /*
 896                          * Default font size is 12, if none given. This is to
 897                          * have a known usedfontsize value.
 898                          */
 899                         FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
 900                         usedfontsize = 12;
 901                 }
 902                 defaultfontsize = usedfontsize;
 903         }
 904
 905         if (xloadfont(&dc.font, pattern))
 906                 die("st: can't open font %s\n", fontstr);
 907
 908         if (usedfontsize < 0) {
 909                 FcPatternGetDouble(dc.font.match->pattern,
 910                                    FC_PIXEL_SIZE, 0, &fontval);
 911                 usedfontsize = fontval;
 912                 if (fontsize == 0)
 913                         defaultfontsize = fontval;
 914         }
 915
 916         /* Setting character width and height. */
 917         win.cw = ceilf(dc.font.width * cwscale);
 918         win.ch = ceilf(dc.font.height * chscale);
 919
 920         FcPatternDel(pattern, FC_SLANT);
 921         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
 922         if (xloadfont(&dc.ifont, pattern))
 923                 die("st: can't open font %s\n", fontstr);
 924
 925         FcPatternDel(pattern, FC_WEIGHT);
 926         FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
 927         if (xloadfont(&dc.ibfont, pattern))
 928                 die("st: can't open font %s\n", fontstr);
 929
 930         FcPatternDel(pattern, FC_SLANT);
 931         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
 932         if (xloadfont(&dc.bfont, pattern))
 933                 die("st: can't open font %s\n", fontstr);
 934
 935         FcPatternDestroy(pattern);
 936 }
 937
 938 void
 939 xunloadfont(Font *f)
 940 {
 941         XftFontClose(xw.dpy, f->match);
 942         FcPatternDestroy(f->pattern);
 943         if (f->set)
 944                 FcFontSetDestroy(f->set);
 945 }
 946
 947 void
 948 xunloadfonts(void)
 949 {
 950         /* Free the loaded fonts in the font cache.  */
 951         while (frclen > 0)
 952                 XftFontClose(xw.dpy, frc[--frclen].font);
 953
 954         xunloadfont(&dc.font);
 955         xunloadfont(&dc.bfont);
 956         xunloadfont(&dc.ifont);
 957         xunloadfont(&dc.ibfont);
 958 }
 959
 960 void
 961 xinit(void)
 962 {
 963         XGCValues gcvalues;
 964         Cursor cursor;
 965         Window parent;
 966         pid_t thispid = getpid();
 967         XColor xmousefg, xmousebg;
 968
 969         if (!(xw.dpy = XOpenDisplay(NULL)))
 970                 die("Can't open display\n");
 971         xw.scr = XDefaultScreen(xw.dpy);
 972         xw.vis = XDefaultVisual(xw.dpy, xw.scr);
 973
 974         /* font */
 975         if (!FcInit())
 976                 die("Could not init fontconfig.\n");
 977
 978         usedfont = (opt_font == NULL)? font : opt_font;
 979         xloadfonts(usedfont, 0);
 980
 981         /* colors */
 982         xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
 983         xloadcols();
 984
 985         /* adjust fixed window geometry */
 986         win.w = 2 * borderpx + term.col * win.cw;
 987         win.h = 2 * borderpx + term.row * win.ch;
 988         if (xw.gm & XNegative)
 989                 xw.l += DisplayWidth(xw.dpy, xw.scr) - win.w - 2;
 990         if (xw.gm & YNegative)
 991                 xw.t += DisplayHeight(xw.dpy, xw.scr) - win.h - 2;
 992
 993         /* Events */
 994         xw.attrs.background_pixel = dc.col[defaultbg].pixel;
 995         xw.attrs.border_pixel = dc.col[defaultbg].pixel;
 996         xw.attrs.bit_gravity = NorthWestGravity;
 997         xw.attrs.event_mask = FocusChangeMask | KeyPressMask
 998                 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
 999                 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
1000         xw.attrs.colormap = xw.cmap;
1001
1002         if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
1003                 parent = XRootWindow(xw.dpy, xw.scr);
1004         xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
1005                         win.w, win.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
1006                         xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
1007                         | CWEventMask | CWColormap, &xw.attrs);
1008
1009         memset(&gcvalues, 0, sizeof(gcvalues));
1010         gcvalues.graphics_exposures = False;
1011         dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
1012                         &gcvalues);
1013         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
1014                         DefaultDepth(xw.dpy, xw.scr));
1015         XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
1016         XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, win.w, win.h);
1017
1018         /* font spec buffer */
1019         xw.specbuf = xmalloc(term.col * sizeof(GlyphFontSpec));
1020
1021         /* Xft rendering context */
1022         xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
1023
1024         /* input methods */
1025         if ((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
1026                 XSetLocaleModifiers("@im=local");
1027                 if ((xw.xim =  XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
1028                         XSetLocaleModifiers("@im=");
1029                         if ((xw.xim = XOpenIM(xw.dpy,
1030                                         NULL, NULL, NULL)) == NULL) {
1031                                 die("XOpenIM failed. Could not open input"
1032                                         " device.\n");
1033                         }
1034                 }
1035         }
1036         xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
1037                                            | XIMStatusNothing, XNClientWindow, xw.win,
1038                                            XNFocusWindow, xw.win, NULL);
1039         if (xw.xic == NULL)
1040                 die("XCreateIC failed. Could not obtain input method.\n");
1041
1042         /* white cursor, black outline */
1043         cursor = XCreateFontCursor(xw.dpy, mouseshape);
1044         XDefineCursor(xw.dpy, xw.win, cursor);
1045
1046         if (XParseColor(xw.dpy, xw.cmap, colorname[mousefg], &xmousefg) == 0) {
1047                 xmousefg.red   = 0xffff;
1048                 xmousefg.green = 0xffff;
1049                 xmousefg.blue  = 0xffff;
1050         }
1051
1052         if (XParseColor(xw.dpy, xw.cmap, colorname[mousebg], &xmousebg) == 0) {
1053                 xmousebg.red   = 0x0000;
1054                 xmousebg.green = 0x0000;
1055                 xmousebg.blue  = 0x0000;
1056         }
1057
1058         XRecolorCursor(xw.dpy, cursor, &xmousefg, &xmousebg);
1059
1060         xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
1061         xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
1062         xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
1063         XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
1064
1065         xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
1066         XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
1067                         PropModeReplace, (uchar *)&thispid, 1);
1068
1069         resettitle();
1070         XMapWindow(xw.dpy, xw.win);
1071         xhints();
1072         XSync(xw.dpy, False);
1073
1074         xsel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
1075         if (xsel.xtarget == None)
1076                 xsel.xtarget = XA_STRING;
1077 }
1078
1079 int
1080 xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x, int y)
1081 {
1082         float winx = borderpx + x * win.cw, winy = borderpx + y * win.ch, xp, yp;
1083         ushort mode, prevmode = USHRT_MAX;
1084         Font *font = &dc.font;
1085         int frcflags = FRC_NORMAL;
1086         float runewidth = win.cw;
1087         Rune rune;
1088         FT_UInt glyphidx;
1089         FcResult fcres;
1090         FcPattern *fcpattern, *fontpattern;
1091         FcFontSet *fcsets[] = { NULL };
1092         FcCharSet *fccharset;
1093         int i, f, numspecs = 0;
1094
1095         for (i = 0, xp = winx, yp = winy + font->ascent; i < len; ++i) {
1096                 /* Fetch rune and mode for current glyph. */
1097                 rune = glyphs[i].u;
1098                 mode = glyphs[i].mode;
1099
1100                 /* Skip dummy wide-character spacing. */
1101                 if (mode == ATTR_WDUMMY)
1102                         continue;
1103
1104                 /* Determine font for glyph if different from previous glyph. */
1105                 if (prevmode != mode) {
1106                         prevmode = mode;
1107                         font = &dc.font;
1108                         frcflags = FRC_NORMAL;
1109                         runewidth = win.cw * ((mode & ATTR_WIDE) ? 2.0f : 1.0f);
1110                         if ((mode & ATTR_ITALIC) && (mode & ATTR_BOLD)) {
1111                                 font = &dc.ibfont;
1112                                 frcflags = FRC_ITALICBOLD;
1113                         } else if (mode & ATTR_ITALIC) {
1114                                 font = &dc.ifont;
1115                                 frcflags = FRC_ITALIC;
1116                         } else if (mode & ATTR_BOLD) {
1117                                 font = &dc.bfont;
1118                                 frcflags = FRC_BOLD;
1119                         }
1120                         yp = winy + font->ascent;
1121                 }
1122
1123                 /* Lookup character index with default font. */
1124                 glyphidx = XftCharIndex(xw.dpy, font->match, rune);
1125                 if (glyphidx) {
1126                         specs[numspecs].font = font->match;
1127                         specs[numspecs].glyph = glyphidx;
1128                         specs[numspecs].x = (short)xp;
1129                         specs[numspecs].y = (short)yp;
1130                         xp += runewidth;
1131                         numspecs++;
1132                         continue;
1133                 }
1134
1135                 /* Fallback on font cache, search the font cache for match. */
1136                 for (f = 0; f < frclen; f++) {
1137                         glyphidx = XftCharIndex(xw.dpy, frc[f].font, rune);
1138                         /* Everything correct. */
1139                         if (glyphidx && frc[f].flags == frcflags)
1140                                 break;
1141                         /* We got a default font for a not found glyph. */
1142                         if (!glyphidx && frc[f].flags == frcflags
1143                                         && frc[f].unicodep == rune) {
1144                                 break;
1145                         }
1146                 }
1147
1148                 /* Nothing was found. Use fontconfig to find matching font. */
1149                 if (f >= frclen) {
1150                         if (!font->set)
1151                                 font->set = FcFontSort(0, font->pattern,
1152                                                        1, 0, &fcres);
1153                         fcsets[0] = font->set;
1154
1155                         /*
1156                          * Nothing was found in the cache. Now use
1157                          * some dozen of Fontconfig calls to get the
1158                          * font for one single character.
1159                          *
1160                          * Xft and fontconfig are design failures.
1161                          */
1162                         fcpattern = FcPatternDuplicate(font->pattern);
1163                         fccharset = FcCharSetCreate();
1164
1165                         FcCharSetAddChar(fccharset, rune);
1166                         FcPatternAddCharSet(fcpattern, FC_CHARSET,
1167                                         fccharset);
1168                         FcPatternAddBool(fcpattern, FC_SCALABLE, 1);
1169
1170                         FcConfigSubstitute(0, fcpattern,
1171                                         FcMatchPattern);
1172                         FcDefaultSubstitute(fcpattern);
1173
1174                         fontpattern = FcFontSetMatch(0, fcsets, 1,
1175                                         fcpattern, &fcres);
1176
1177                         /*
1178                          * Overwrite or create the new cache entry.
1179                          */
1180                         if (frclen >= LEN(frc)) {
1181                                 frclen = LEN(frc) - 1;
1182                                 XftFontClose(xw.dpy, frc[frclen].font);
1183                                 frc[frclen].unicodep = 0;
1184                         }
1185
1186                         frc[frclen].font = XftFontOpenPattern(xw.dpy,
1187                                         fontpattern);
1188                         if (!frc[frclen].font)
1189                                 die("XftFontOpenPattern failed seeking fallback font: %s\n",
1190                                         strerror(errno));
1191                         frc[frclen].flags = frcflags;
1192                         frc[frclen].unicodep = rune;
1193
1194                         glyphidx = XftCharIndex(xw.dpy, frc[frclen].font, rune);
1195
1196                         f = frclen;
1197                         frclen++;
1198
1199                         FcPatternDestroy(fcpattern);
1200                         FcCharSetDestroy(fccharset);
1201                 }
1202
1203                 specs[numspecs].font = frc[f].font;
1204                 specs[numspecs].glyph = glyphidx;
1205                 specs[numspecs].x = (short)xp;
1206                 specs[numspecs].y = (short)yp;
1207                 xp += runewidth;
1208                 numspecs++;
1209         }
1210
1211         return numspecs;
1212 }
1213
1214 void
1215 xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, int y)
1216 {
1217         int charlen = len * ((base.mode & ATTR_WIDE) ? 2 : 1);
1218         int winx = borderpx + x * win.cw, winy = borderpx + y * win.ch,
1219             width = charlen * win.cw;
1220         Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
1221         XRenderColor colfg, colbg;
1222         XRectangle r;
1223
1224         /* Fallback on color display for attributes not supported by the font */
1225         if (base.mode & ATTR_ITALIC && base.mode & ATTR_BOLD) {
1226                 if (dc.ibfont.badslant || dc.ibfont.badweight)
1227                         base.fg = defaultattr;
1228         } else if ((base.mode & ATTR_ITALIC && dc.ifont.badslant) ||
1229             (base.mode & ATTR_BOLD && dc.bfont.badweight)) {
1230                 base.fg = defaultattr;
1231         }
1232
1233         if (IS_TRUECOL(base.fg)) {
1234                 colfg.alpha = 0xffff;
1235                 colfg.red = TRUERED(base.fg);
1236                 colfg.green = TRUEGREEN(base.fg);
1237                 colfg.blue = TRUEBLUE(base.fg);
1238                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
1239                 fg = &truefg;
1240         } else {
1241                 fg = &dc.col[base.fg];
1242         }
1243
1244         if (IS_TRUECOL(base.bg)) {
1245                 colbg.alpha = 0xffff;
1246                 colbg.green = TRUEGREEN(base.bg);
1247                 colbg.red = TRUERED(base.bg);
1248                 colbg.blue = TRUEBLUE(base.bg);
1249                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
1250                 bg = &truebg;
1251         } else {
1252                 bg = &dc.col[base.bg];
1253         }
1254
1255         /* Change basic system colors [0-7] to bright system colors [8-15] */
1256         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_BOLD && BETWEEN(base.fg, 0, 7))
1257                 fg = &dc.col[base.fg + 8];
1258
1259         if (IS_SET(MODE_REVERSE)) {
1260                 if (fg == &dc.col[defaultfg]) {
1261                         fg = &dc.col[defaultbg];
1262                 } else {
1263                         colfg.red = ~fg->color.red;
1264                         colfg.green = ~fg->color.green;
1265                         colfg.blue = ~fg->color.blue;
1266                         colfg.alpha = fg->color.alpha;
1267                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
1268                                         &revfg);
1269                         fg = &revfg;
1270                 }
1271
1272                 if (bg == &dc.col[defaultbg]) {
1273                         bg = &dc.col[defaultfg];
1274                 } else {
1275                         colbg.red = ~bg->color.red;
1276                         colbg.green = ~bg->color.green;
1277                         colbg.blue = ~bg->color.blue;
1278                         colbg.alpha = bg->color.alpha;
1279                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
1280                                         &revbg);
1281                         bg = &revbg;
1282                 }
1283         }
1284
1285         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_FAINT) {
1286                 colfg.red = fg->color.red / 2;
1287                 colfg.green = fg->color.green / 2;
1288                 colfg.blue = fg->color.blue / 2;
1289                 colfg.alpha = fg->color.alpha;
1290                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
1291                 fg = &revfg;
1292         }
1293
1294
1295         if (base.mode & ATTR_REVERSE) {
1296                 temp = fg;
1297                 fg = bg;
1298                 bg = temp;
1299         }
1300
1301         if (base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
1302                 fg = bg;
1303
1304         if (base.mode & ATTR_INVISIBLE)
1305                 fg = bg;
1306
1307         /* Intelligent cleaning up of the borders. */
1308         if (x == 0) {
1309                 xclear(0, (y == 0)? 0 : winy, borderpx,
1310                         winy + win.ch + ((y >= term.row-1)? win.h : 0));
1311         }
1312         if (x + charlen >= term.col) {
1313                 xclear(winx + width, (y == 0)? 0 : winy, win.w,
1314                         ((y >= term.row-1)? win.h : (winy + win.ch)));
1315         }
1316         if (y == 0)
1317                 xclear(winx, 0, winx + width, borderpx);
1318         if (y == term.row-1)
1319                 xclear(winx, winy + win.ch, winx + width, win.h);
1320
1321         /* Clean up the region we want to draw to. */
1322         XftDrawRect(xw.draw, bg, winx, winy, width, win.ch);
1323
1324         /* Set the clip region because Xft is sometimes dirty. */
1325         r.x = 0;
1326         r.y = 0;
1327         r.height = win.ch;
1328         r.width = width;
1329         XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
1330
1331         /* Render the glyphs. */
1332         XftDrawGlyphFontSpec(xw.draw, fg, specs, len);
1333
1334         /* Render underline and strikethrough. */
1335         if (base.mode & ATTR_UNDERLINE) {
1336                 XftDrawRect(xw.draw, fg, winx, winy + dc.font.ascent + 1,
1337                                 width, 1);
1338         }
1339
1340         if (base.mode & ATTR_STRUCK) {
1341                 XftDrawRect(xw.draw, fg, winx, winy + 2 * dc.font.ascent / 3,
1342                                 width, 1);
1343         }
1344
1345         /* Reset clip to none. */
1346         XftDrawSetClip(xw.draw, 0);
1347 }
1348
1349 void
1350 xdrawglyph(Glyph g, int x, int y)
1351 {
1352         int numspecs;
1353         XftGlyphFontSpec spec;
1354
1355         numspecs = xmakeglyphfontspecs(&spec, &g, 1, x, y);
1356         xdrawglyphfontspecs(&spec, g, numspecs, x, y);
1357 }
1358
1359 void
1360 xdrawcursor(void)
1361 {
1362         static int oldx = 0, oldy = 0;
1363         int curx;
1364         Glyph g = {' ', ATTR_NULL, defaultbg, defaultcs}, og;
1365         int ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
1366         Color drawcol;
1367
1368         LIMIT(oldx, 0, term.col-1);
1369         LIMIT(oldy, 0, term.row-1);
1370
1371         curx = term.c.x;
1372
1373         /* adjust position if in dummy */
1374         if (term.line[oldy][oldx].mode & ATTR_WDUMMY)
1375                 oldx--;
1376         if (term.line[term.c.y][curx].mode & ATTR_WDUMMY)
1377                 curx--;
1378
1379         /* remove the old cursor */
1380         og = term.line[oldy][oldx];
1381         if (ena_sel && selected(oldx, oldy))
1382                 og.mode ^= ATTR_REVERSE;
1383         xdrawglyph(og, oldx, oldy);
1384
1385         g.u = term.line[term.c.y][term.c.x].u;
1386         g.mode |= term.line[term.c.y][term.c.x].mode &
1387                   (ATTR_BOLD | ATTR_ITALIC | ATTR_UNDERLINE | ATTR_STRUCK);
1388
1389         /*
1390          * Select the right color for the right mode.
1391          */
1392         if (IS_SET(MODE_REVERSE)) {
1393                 g.mode |= ATTR_REVERSE;
1394                 g.bg = defaultfg;
1395                 if (ena_sel && selected(term.c.x, term.c.y)) {
1396                         drawcol = dc.col[defaultcs];
1397                         g.fg = defaultrcs;
1398                 } else {
1399                         drawcol = dc.col[defaultrcs];
1400                         g.fg = defaultcs;
1401                 }
1402         } else {
1403                 if (ena_sel && selected(term.c.x, term.c.y)) {
1404                         drawcol = dc.col[defaultrcs];
1405                         g.fg = defaultfg;
1406                         g.bg = defaultrcs;
1407                 } else {
1408                         drawcol = dc.col[defaultcs];
1409                 }
1410         }
1411
1412         if (IS_SET(MODE_HIDE))
1413                 return;
1414
1415         /* draw the new one */
1416         if (win.state & WIN_FOCUSED) {
1417                 switch (win.cursor) {
1418                 case 7: /* st extension: snowman */
1419                         utf8decode("☃", &g.u, UTF_SIZ);
1420                 case 0: /* Blinking Block */
1421                 case 1: /* Blinking Block (Default) */
1422                 case 2: /* Steady Block */
1423                         g.mode |= term.line[term.c.y][curx].mode & ATTR_WIDE;
1424                         xdrawglyph(g, term.c.x, term.c.y);
1425                         break;
1426                 case 3: /* Blinking Underline */
1427                 case 4: /* Steady Underline */
1428                         XftDrawRect(xw.draw, &drawcol,
1429                                         borderpx + curx * win.cw,
1430                                         borderpx + (term.c.y + 1) * win.ch - \
1431                                                 cursorthickness,
1432                                         win.cw, cursorthickness);
1433                         break;
1434                 case 5: /* Blinking bar */
1435                 case 6: /* Steady bar */
1436                         XftDrawRect(xw.draw, &drawcol,
1437                                         borderpx + curx * win.cw,
1438                                         borderpx + term.c.y * win.ch,
1439                                         cursorthickness, win.ch);
1440                         break;
1441                 }
1442         } else {
1443                 XftDrawRect(xw.draw, &drawcol,
1444                                 borderpx + curx * win.cw,
1445                                 borderpx + term.c.y * win.ch,
1446                                 win.cw - 1, 1);
1447                 XftDrawRect(xw.draw, &drawcol,
1448                                 borderpx + curx * win.cw,
1449                                 borderpx + term.c.y * win.ch,
1450                                 1, win.ch - 1);
1451                 XftDrawRect(xw.draw, &drawcol,
1452                                 borderpx + (curx + 1) * win.cw - 1,
1453                                 borderpx + term.c.y * win.ch,
1454                                 1, win.ch - 1);
1455                 XftDrawRect(xw.draw, &drawcol,
1456                                 borderpx + curx * win.cw,
1457                                 borderpx + (term.c.y + 1) * win.ch - 1,
1458                                 win.cw, 1);
1459         }
1460         oldx = curx, oldy = term.c.y;
1461 }
1462
1463 void
1464 xsetenv(void)
1465 {
1466         char buf[sizeof(long) * 8 + 1];
1467
1468         snprintf(buf, sizeof(buf), "%lu", xw.win);
1469         setenv("WINDOWID", buf, 1);
1470 }
1471
1472 void
1473 xsettitle(char *p)
1474 {
1475         XTextProperty prop;
1476
1477         Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
1478                         &prop);
1479         XSetWMName(xw.dpy, xw.win, &prop);
1480         XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
1481         XFree(prop.value);
1482 }
1483
1484 void
1485 draw(void)
1486 {
1487         drawregion(0, 0, term.col, term.row);
1488         XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, win.w,
1489                         win.h, 0, 0);
1490         XSetForeground(xw.dpy, dc.gc,
1491                         dc.col[IS_SET(MODE_REVERSE)?
1492                                 defaultfg : defaultbg].pixel);
1493 }
1494
1495 void
1496 drawregion(int x1, int y1, int x2, int y2)
1497 {
1498         int i, x, y, ox, numspecs;
1499         Glyph base, new;
1500         XftGlyphFontSpec *specs;
1501         int ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
1502
1503         if (!(win.state & WIN_VISIBLE))
1504                 return;
1505
1506         for (y = y1; y < y2; y++) {
1507                 if (!term.dirty[y])
1508                         continue;
1509
1510                 term.dirty[y] = 0;
1511
1512                 specs = xw.specbuf;
1513                 numspecs = xmakeglyphfontspecs(specs, &term.line[y][x1], x2 - x1, x1, y);
1514
1515                 i = ox = 0;
1516                 for (x = x1; x < x2 && i < numspecs; x++) {
1517                         new = term.line[y][x];
1518                         if (new.mode == ATTR_WDUMMY)
1519                                 continue;
1520                         if (ena_sel && selected(x, y))
1521                                 new.mode ^= ATTR_REVERSE;
1522                         if (i > 0 && ATTRCMP(base, new)) {
1523                                 xdrawglyphfontspecs(specs, base, i, ox, y);
1524                                 specs += i;
1525                                 numspecs -= i;
1526                                 i = 0;
1527                         }
1528                         if (i == 0) {
1529                                 ox = x;
1530                                 base = new;
1531                         }
1532                         i++;
1533                 }
1534                 if (i > 0)
1535                         xdrawglyphfontspecs(specs, base, i, ox, y);
1536         }
1537         xdrawcursor();
1538 }
1539
1540 void
1541 expose(XEvent *ev)
1542 {
1543         redraw();
1544 }
1545
1546 void
1547 visibility(XEvent *ev)
1548 {
1549         XVisibilityEvent *e = &ev->xvisibility;
1550
1551         MODBIT(win.state, e->state != VisibilityFullyObscured, WIN_VISIBLE);
1552 }
1553
1554 void
1555 unmap(XEvent *ev)
1556 {
1557         win.state &= ~WIN_VISIBLE;
1558 }
1559
1560 void
1561 xsetpointermotion(int set)
1562 {
1563         MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
1564         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
1565 }
1566
1567 void
1568 xseturgency(int add)
1569 {
1570         XWMHints *h = XGetWMHints(xw.dpy, xw.win);
1571
1572         MODBIT(h->flags, add, XUrgencyHint);
1573         XSetWMHints(xw.dpy, xw.win, h);
1574         XFree(h);
1575 }
1576
1577 void
1578 xbell(void)
1579 {
1580         if (!(win.state & WIN_FOCUSED))
1581                 xseturgency(1);
1582         if (bellvolume)
1583                 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
1584 }
1585
1586 void
1587 focus(XEvent *ev)
1588 {
1589         XFocusChangeEvent *e = &ev->xfocus;
1590
1591         if (e->mode == NotifyGrab)
1592                 return;
1593
1594         if (ev->type == FocusIn) {
1595                 XSetICFocus(xw.xic);
1596                 win.state |= WIN_FOCUSED;
1597                 xseturgency(0);
1598                 if (IS_SET(MODE_FOCUS))
1599                         ttywrite("\033[I", 3);
1600         } else {
1601                 XUnsetICFocus(xw.xic);
1602                 win.state &= ~WIN_FOCUSED;
1603                 if (IS_SET(MODE_FOCUS))
1604                         ttywrite("\033[O", 3);
1605         }
1606 }
1607
1608 int
1609 match(uint mask, uint state)
1610 {
1611         return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
1612 }
1613
1614 char*
1615 kmap(KeySym k, uint state)
1616 {
1617         Key *kp;
1618         int i;
1619
1620         /* Check for mapped keys out of X11 function keys. */
1621         for (i = 0; i < mappedkeyslen; i++) {
1622                 if (mappedkeys[i] == k)
1623                         break;
1624         }
1625         if (i == mappedkeyslen) {
1626                 if ((k & 0xFFFF) < 0xFD00)
1627                         return NULL;
1628         }
1629
1630         for (kp = key; kp < key + keyslen; kp++) {
1631                 if (kp->k != k)
1632                         continue;
1633
1634                 if (!match(kp->mask, state))
1635                         continue;
1636
1637                 if (IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
1638                         continue;
1639                 if (term.numlock && kp->appkey == 2)
1640                         continue;
1641
1642                 if (IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
1643                         continue;
1644
1645                 if (IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
1646                         continue;
1647
1648                 return kp->s;
1649         }
1650
1651         return NULL;
1652 }
1653
1654 void
1655 kpress(XEvent *ev)
1656 {
1657         XKeyEvent *e = &ev->xkey;
1658         KeySym ksym;
1659         char buf[32], *customkey;
1660         int len;
1661         Rune c;
1662         Status status;
1663         Shortcut *bp;
1664
1665         if (IS_SET(MODE_KBDLOCK))
1666                 return;
1667
1668         len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
1669         /* 1. shortcuts */
1670         for (bp = shortcuts; bp < shortcuts + shortcutslen; bp++) {
1671                 if (ksym == bp->keysym && match(bp->mod, e->state)) {
1672                         bp->func(&(bp->arg));
1673                         return;
1674                 }
1675         }
1676
1677         /* 2. custom keys from config.h */
1678         if ((customkey = kmap(ksym, e->state))) {
1679                 ttysend(customkey, strlen(customkey));
1680                 return;
1681         }
1682
1683         /* 3. composed string from input method */
1684         if (len == 0)
1685                 return;
1686         if (len == 1 && e->state & Mod1Mask) {
1687                 if (IS_SET(MODE_8BIT)) {
1688                         if (*buf < 0177) {
1689                                 c = *buf | 0x80;
1690                                 len = utf8encode(c, buf);
1691                         }
1692                 } else {
1693                         buf[1] = buf[0];
1694                         buf[0] = '\033';
1695                         len = 2;
1696                 }
1697         }
1698         ttysend(buf, len);
1699 }
1700
1701
1702 void
1703 cmessage(XEvent *e)
1704 {
1705         /*
1706          * See xembed specs
1707          *  http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
1708          */
1709         if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
1710                 if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
1711                         win.state |= WIN_FOCUSED;
1712                         xseturgency(0);
1713                 } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
1714                         win.state &= ~WIN_FOCUSED;
1715                 }
1716         } else if (e->xclient.data.l[0] == xw.wmdeletewin) {
1717                 /* Send SIGHUP to shell */
1718                 kill(pid, SIGHUP);
1719                 exit(0);
1720         }
1721 }
1722
1723 void
1724 resize(XEvent *e)
1725 {
1726         if (e->xconfigure.width == win.w && e->xconfigure.height == win.h)
1727                 return;
1728
1729         cresize(e->xconfigure.width, e->xconfigure.height);
1730         ttyresize(win.tw, win.th);
1731 }
1732
1733 void
1734 run(void)
1735 {
1736         XEvent ev;
1737         int w = win.w, h = win.h;
1738         fd_set rfd;
1739         int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
1740         struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
1741         long deltatime;
1742
1743         /* Waiting for window mapping */
1744         do {
1745                 XNextEvent(xw.dpy, &ev);
1746                 /*
1747                  * This XFilterEvent call is required because of XOpenIM. It
1748                  * does filter out the key event and some client message for
1749                  * the input method too.
1750                  */
1751                 if (XFilterEvent(&ev, None))
1752                         continue;
1753                 if (ev.type == ConfigureNotify) {
1754                         w = ev.xconfigure.width;
1755                         h = ev.xconfigure.height;
1756                 }
1757         } while (ev.type != MapNotify);
1758
1759         cresize(w, h);
1760         ttynew();
1761         ttyresize(win.tw, win.th);
1762
1763         clock_gettime(CLOCK_MONOTONIC, &last);
1764         lastblink = last;
1765
1766         for (xev = actionfps;;) {
1767                 FD_ZERO(&rfd);
1768                 FD_SET(cmdfd, &rfd);
1769                 FD_SET(xfd, &rfd);
1770
1771                 if (pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
1772                         if (errno == EINTR)
1773                                 continue;
1774                         die("select failed: %s\n", strerror(errno));
1775                 }
1776                 if (FD_ISSET(cmdfd, &rfd)) {
1777                         ttyread();
1778                         if (blinktimeout) {
1779                                 blinkset = tattrset(ATTR_BLINK);
1780                                 if (!blinkset)
1781                                         MODBIT(term.mode, 0, MODE_BLINK);
1782                         }
1783                 }
1784
1785                 if (FD_ISSET(xfd, &rfd))
1786                         xev = actionfps;
1787
1788                 clock_gettime(CLOCK_MONOTONIC, &now);
1789                 drawtimeout.tv_sec = 0;
1790                 drawtimeout.tv_nsec =  (1000 * 1E6)/ xfps;
1791                 tv = &drawtimeout;
1792
1793                 dodraw = 0;
1794                 if (blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
1795                         tsetdirtattr(ATTR_BLINK);
1796                         term.mode ^= MODE_BLINK;
1797                         lastblink = now;
1798                         dodraw = 1;
1799                 }
1800                 deltatime = TIMEDIFF(now, last);
1801                 if (deltatime > 1000 / (xev ? xfps : actionfps)) {
1802                         dodraw = 1;
1803                         last = now;
1804                 }
1805
1806                 if (dodraw) {
1807                         while (XPending(xw.dpy)) {
1808                                 XNextEvent(xw.dpy, &ev);
1809                                 if (XFilterEvent(&ev, None))
1810                                         continue;
1811                                 if (handler[ev.type])
1812                                         (handler[ev.type])(&ev);
1813                         }
1814
1815                         draw();
1816                         XFlush(xw.dpy);
1817
1818                         if (xev && !FD_ISSET(xfd, &rfd))
1819                                 xev--;
1820                         if (!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
1821                                 if (blinkset) {
1822                                         if (TIMEDIFF(now, lastblink) \
1823                                                         > blinktimeout) {
1824                                                 drawtimeout.tv_nsec = 1000;
1825                                         } else {
1826                                                 drawtimeout.tv_nsec = (1E6 * \
1827                                                         (blinktimeout - \
1828                                                         TIMEDIFF(now,
1829                                                                 lastblink)));
1830                                         }
1831                                         drawtimeout.tv_sec = \
1832                                             drawtimeout.tv_nsec / 1E9;
1833                                         drawtimeout.tv_nsec %= (long)1E9;
1834                                 } else {
1835                                         tv = NULL;
1836                                 }
1837                         }
1838                 }
1839         }
1840 }
1841
1842 void
1843 usage(void)
1844 {
1845         die("usage: %s [-aiv] [-c class] [-f font] [-g geometry]"
1846             " [-n name] [-o file]\n"
1847             "          [-T title] [-t title] [-w windowid]"
1848             " [[-e] command [args ...]]\n"
1849             "       %s [-aiv] [-c class] [-f font] [-g geometry]"
1850             " [-n name] [-o file]\n"
1851             "          [-T title] [-t title] [-w windowid] -l line"
1852             " [stty_args ...]\n", argv0, argv0);
1853 }
1854
1855 int
1856 main(int argc, char *argv[])
1857 {
1858         xw.l = xw.t = 0;
1859         xw.isfixed = False;
1860         win.cursor = cursorshape;
1861
1862         ARGBEGIN {
1863         case 'a':
1864                 allowaltscreen = 0;
1865                 break;
1866         case 'c':
1867                 opt_class = EARGF(usage());
1868                 break;
1869         case 'e':
1870                 if (argc > 0)
1871                         --argc, ++argv;
1872                 goto run;
1873         case 'f':
1874                 opt_font = EARGF(usage());
1875                 break;
1876         case 'g':
1877                 xw.gm = XParseGeometry(EARGF(usage()),
1878                                 &xw.l, &xw.t, &cols, &rows);
1879                 break;
1880         case 'i':
1881                 xw.isfixed = 1;
1882                 break;
1883         case 'o':
1884                 opt_io = EARGF(usage());
1885                 break;
1886         case 'l':
1887                 opt_line = EARGF(usage());
1888                 break;
1889         case 'n':
1890                 opt_name = EARGF(usage());
1891                 break;
1892         case 't':
1893         case 'T':
1894                 opt_title = EARGF(usage());
1895                 break;
1896         case 'w':
1897                 opt_embed = EARGF(usage());
1898                 break;
1899         case 'v':
1900                 die("%s " VERSION " (c) 2010-2016 st engineers\n", argv0);
1901                 break;
1902         default:
1903                 usage();
1904         } ARGEND;
1905
1906 run:
1907         if (argc > 0) {
1908                 /* eat all remaining arguments */
1909                 opt_cmd = argv;
1910                 if (!opt_title && !opt_line)
1911                         opt_title = basename(xstrdup(argv[0]));
1912         }
1913         setlocale(LC_CTYPE, "");
1914         XSetLocaleModifiers("");
1915         tnew(MAX(cols, 1), MAX(rows, 1));
1916         xinit();
1917         xsetenv();
1918         selinit();
1919         run();
1920
1921         return 0;
1922 }