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