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 /* types used in config.h */
  24 typedef struct {
  25         uint mod;
  26         KeySym keysym;
  27         void (*func)(const Arg *);
  28         const Arg arg;
  29 } Shortcut;
  30
  31 typedef struct {
  32         uint b;
  33         uint mask;
  34         char *s;
  35 } MouseShortcut;
  36
  37 typedef struct {
  38         KeySym k;
  39         uint mask;
  40         char *s;
  41         /* three valued logic variables: 0 indifferent, 1 on, -1 off */
  42         signed char appkey;    /* application keypad */
  43         signed char appcursor; /* application cursor */
  44         signed char crlf;      /* crlf mode          */
  45 } Key;
  46
  47 /* X modifiers */
  48 #define XK_ANY_MOD    UINT_MAX
  49 #define XK_NO_MOD     0
  50 #define XK_SWITCH_MOD (1<<13)
  51
  52 /* function definitions used in config.h */
  53 static void clipcopy(const Arg *);
  54 static void clippaste(const Arg *);
  55 static void selpaste(const Arg *);
  56 static void zoom(const Arg *);
  57 static void zoomabs(const Arg *);
  58 static void zoomreset(const Arg *);
  59
  60 /* config.h for applying patches and the configuration. */
  61 #include "config.h"
  62
  63 /* XEMBED messages */
  64 #define XEMBED_FOCUS_IN  4
  65 #define XEMBED_FOCUS_OUT 5
  66
  67 /* macros */
  68 #define TRUERED(x)              (((x) & 0xff0000) >> 8)
  69 #define TRUEGREEN(x)            (((x) & 0xff00))
  70 #define TRUEBLUE(x)             (((x) & 0xff) << 8)
  71
  72 typedef XftDraw *Draw;
  73 typedef XftColor Color;
  74 typedef XftGlyphFontSpec GlyphFontSpec;
  75
  76 /* Purely graphic info */
  77 typedef struct {
  78         Display *dpy;
  79         Colormap cmap;
  80         Window win;
  81         Drawable buf;
  82         GlyphFontSpec *specbuf; /* font spec buffer used for rendering */
  83         Atom xembed, wmdeletewin, netwmname, netwmpid;
  84         XIM xim;
  85         XIC xic;
  86         Draw draw;
  87         Visual *vis;
  88         XSetWindowAttributes attrs;
  89         int scr;
  90         int isfixed; /* is fixed geometry? */
  91         int l, t; /* left and top offset */
  92         int gm; /* geometry mask */
  93 } XWindow;
  94
  95 typedef struct {
  96         Atom xtarget;
  97         char *primary, *clipboard;
  98         struct timespec tclick1;
  99         struct timespec tclick2;
 100 } XSelection;
 101
 102 /* Font structure */
 103 #define Font Font_
 104 typedef struct {
 105         int height;
 106         int width;
 107         int ascent;
 108         int descent;
 109         int badslant;
 110         int badweight;
 111         short lbearing;
 112         short rbearing;
 113         XftFont *match;
 114         FcFontSet *set;
 115         FcPattern *pattern;
 116 } Font;
 117
 118 /* Drawing Context */
 119 typedef struct {
 120         Color *col;
 121         size_t collen;
 122         Font font, bfont, ifont, ibfont;
 123         GC gc;
 124 } DC;
 125
 126 static inline ushort sixd_to_16bit(int);
 127 static int xmakeglyphfontspecs(XftGlyphFontSpec *, const Glyph *, int, int, int);
 128 static void xdrawglyphfontspecs(const XftGlyphFontSpec *, Glyph, int, int, int);
 129 static void xdrawglyph(Glyph, int, int);
 130 static void xclear(int, int, int, int);
 131 static void xdrawcursor(void);
 132 static int xgeommasktogravity(int);
 133 static void xinit(void);
 134 static void cresize(int, int);
 135 static void xresize(int, int);
 136 static int xloadfont(Font *, FcPattern *);
 137 static void xloadfonts(char *, double);
 138 static void xunloadfont(Font *);
 139 static void xunloadfonts(void);
 140 static void xsetenv(void);
 141 static void xseturgency(int);
 142 static int x2col(int);
 143 static int y2row(int);
 144
 145 static void expose(XEvent *);
 146 static void visibility(XEvent *);
 147 static void unmap(XEvent *);
 148 static void kpress(XEvent *);
 149 static void cmessage(XEvent *);
 150 static void resize(XEvent *);
 151 static void focus(XEvent *);
 152 static void brelease(XEvent *);
 153 static void bpress(XEvent *);
 154 static void bmotion(XEvent *);
 155 static void propnotify(XEvent *);
 156 static void selnotify(XEvent *);
 157 static void selclear_(XEvent *);
 158 static void selrequest(XEvent *);
 159 static void setsel(char *, Time);
 160 static void getbuttoninfo(XEvent *);
 161 static void mousereport(XEvent *);
 162 static char *kmap(KeySym, uint);
 163 static int match(uint, uint);
 164
 165 static void run(void);
 166 static void usage(void);
 167
 168 static void (*handler[LASTEvent])(XEvent *) = {
 169         [KeyPress] = kpress,
 170         [ClientMessage] = cmessage,
 171         [ConfigureNotify] = resize,
 172         [VisibilityNotify] = visibility,
 173         [UnmapNotify] = unmap,
 174         [Expose] = expose,
 175         [FocusIn] = focus,
 176         [FocusOut] = focus,
 177         [MotionNotify] = bmotion,
 178         [ButtonPress] = bpress,
 179         [ButtonRelease] = brelease,
 180 /*
 181  * Uncomment if you want the selection to disappear when you select something
 182  * different in another window.
 183  */
 184 /*      [SelectionClear] = selclear_, */
 185         [SelectionNotify] = selnotify,
 186 /*
 187  * PropertyNotify is only turned on when there is some INCR transfer happening
 188  * for the selection retrieval.
 189  */
 190         [PropertyNotify] = propnotify,
 191         [SelectionRequest] = selrequest,
 192 };
 193
 194 /* Globals */
 195 static DC dc;
 196 static XWindow xw;
 197 static XSelection xsel;
 198 static TermWindow win;
 199
 200 enum window_state {
 201         WIN_VISIBLE = 1,
 202         WIN_FOCUSED = 2
 203 };
 204
 205 /* Font Ring Cache */
 206 enum {
 207         FRC_NORMAL,
 208         FRC_ITALIC,
 209         FRC_BOLD,
 210         FRC_ITALICBOLD
 211 };
 212
 213 typedef struct {
 214         XftFont *font;
 215         int flags;
 216         Rune unicodep;
 217 } Fontcache;
 218
 219 /* Fontcache is an array now. A new font will be appended to the array. */
 220 static Fontcache frc[16];
 221 static int frclen = 0;
 222 static char *usedfont = NULL;
 223 static double usedfontsize = 0;
 224 static double defaultfontsize = 0;
 225
 226 static char *opt_class = NULL;
 227 static char **opt_cmd  = NULL;
 228 static char *opt_embed = NULL;
 229 static char *opt_font  = NULL;
 230 static char *opt_io    = NULL;
 231 static char *opt_line  = NULL;
 232 static char *opt_name  = NULL;
 233 static char *opt_title = NULL;
 234
 235 void
 236 clipcopy(const Arg *dummy)
 237 {
 238         Atom clipboard;
 239
 240         if (xsel.clipboard != NULL)
 241                 free(xsel.clipboard);
 242
 243         if (xsel.primary != NULL) {
 244                 xsel.clipboard = xstrdup(xsel.primary);
 245                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 246                 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
 247         }
 248 }
 249
 250 void
 251 clippaste(const Arg *dummy)
 252 {
 253         Atom clipboard;
 254
 255         clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 256         XConvertSelection(xw.dpy, clipboard, xsel.xtarget, clipboard,
 257                         xw.win, CurrentTime);
 258 }
 259
 260 void
 261 selpaste(const Arg *dummy)
 262 {
 263         XConvertSelection(xw.dpy, XA_PRIMARY, xsel.xtarget, XA_PRIMARY,
 264                         xw.win, CurrentTime);
 265 }
 266
 267 void
 268 zoom(const Arg *arg)
 269 {
 270         Arg larg;
 271
 272         larg.f = usedfontsize + arg->f;
 273         zoomabs(&larg);
 274 }
 275
 276 void
 277 zoomabs(const Arg *arg)
 278 {
 279         xunloadfonts();
 280         xloadfonts(usedfont, arg->f);
 281         cresize(0, 0);
 282         redraw();
 283         xhints();
 284 }
 285
 286 void
 287 zoomreset(const Arg *arg)
 288 {
 289         Arg larg;
 290
 291         if (defaultfontsize > 0) {
 292                 larg.f = defaultfontsize;
 293                 zoomabs(&larg);
 294         }
 295 }
 296
 297 int
 298 x2col(int x)
 299 {
 300         x -= borderpx;
 301         x /= win.cw;
 302
 303         return LIMIT(x, 0, term.col-1);
 304 }
 305
 306 int
 307 y2row(int y)
 308 {
 309         y -= borderpx;
 310         y /= win.ch;
 311
 312         return LIMIT(y, 0, term.row-1);
 313 }
 314
 315 void
 316 getbuttoninfo(XEvent *e)
 317 {
 318         int type;
 319         uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
 320
 321         sel.alt = IS_SET(MODE_ALTSCREEN);
 322
 323         sel.oe.x = x2col(e->xbutton.x);
 324         sel.oe.y = y2row(e->xbutton.y);
 325         selnormalize();
 326
 327         sel.type = SEL_REGULAR;
 328         for (type = 1; type < LEN(selmasks); ++type) {
 329                 if (match(selmasks[type], state)) {
 330                         sel.type = type;
 331                         break;
 332                 }
 333         }
 334 }
 335
 336 void
 337 mousereport(XEvent *e)
 338 {
 339         int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
 340             button = e->xbutton.button, state = e->xbutton.state,
 341             len;
 342         char buf[40];
 343         static int ox, oy;
 344
 345         /* from urxvt */
 346         if (e->xbutton.type == MotionNotify) {
 347                 if (x == ox && y == oy)
 348                         return;
 349                 if (!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
 350                         return;
 351                 /* MOUSE_MOTION: no reporting if no button is pressed */
 352                 if (IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
 353                         return;
 354
 355                 button = oldbutton + 32;
 356                 ox = x;
 357                 oy = y;
 358         } else {
 359                 if (!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
 360                         button = 3;
 361                 } else {
 362                         button -= Button1;
 363                         if (button >= 3)
 364                                 button += 64 - 3;
 365                 }
 366                 if (e->xbutton.type == ButtonPress) {
 367                         oldbutton = button;
 368                         ox = x;
 369                         oy = y;
 370                 } else if (e->xbutton.type == ButtonRelease) {
 371                         oldbutton = 3;
 372                         /* MODE_MOUSEX10: no button release reporting */
 373                         if (IS_SET(MODE_MOUSEX10))
 374                                 return;
 375                         if (button == 64 || button == 65)
 376                                 return;
 377                 }
 378         }
 379
 380         if (!IS_SET(MODE_MOUSEX10)) {
 381                 button += ((state & ShiftMask  ) ? 4  : 0)
 382                         + ((state & Mod4Mask   ) ? 8  : 0)
 383                         + ((state & ControlMask) ? 16 : 0);
 384         }
 385
 386         if (IS_SET(MODE_MOUSESGR)) {
 387                 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
 388                                 button, x+1, y+1,
 389                                 e->xbutton.type == ButtonRelease ? 'm' : 'M');
 390         } else if (x < 223 && y < 223) {
 391                 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
 392                                 32+button, 32+x+1, 32+y+1);
 393         } else {
 394                 return;
 395         }
 396
 397         ttywrite(buf, len);
 398 }
 399
 400 void
 401 bpress(XEvent *e)
 402 {
 403         struct timespec now;
 404         MouseShortcut *ms;
 405
 406         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 407                 mousereport(e);
 408                 return;
 409         }
 410
 411         for (ms = mshortcuts; ms < mshortcuts + LEN(mshortcuts); ms++) {
 412                 if (e->xbutton.button == ms->b
 413                                 && match(ms->mask, e->xbutton.state)) {
 414                         ttysend(ms->s, strlen(ms->s));
 415                         return;
 416                 }
 417         }
 418
 419         if (e->xbutton.button == Button1) {
 420                 clock_gettime(CLOCK_MONOTONIC, &now);
 421
 422                 /* Clear previous selection, logically and visually. */
 423                 selclear_(NULL);
 424                 sel.mode = SEL_EMPTY;
 425                 sel.type = SEL_REGULAR;
 426                 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
 427                 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
 428
 429                 /*
 430                  * If the user clicks below predefined timeouts specific
 431                  * snapping behaviour is exposed.
 432                  */
 433                 if (TIMEDIFF(now, xsel.tclick2) <= tripleclicktimeout) {
 434                         sel.snap = SNAP_LINE;
 435                 } else if (TIMEDIFF(now, xsel.tclick1) <= doubleclicktimeout) {
 436                         sel.snap = SNAP_WORD;
 437                 } else {
 438                         sel.snap = 0;
 439                 }
 440                 selnormalize();
 441
 442                 if (sel.snap != 0)
 443                         sel.mode = SEL_READY;
 444                 tsetdirt(sel.nb.y, sel.ne.y);
 445                 xsel.tclick2 = xsel.tclick1;
 446                 xsel.tclick1 = now;
 447         }
 448 }
 449
 450 void
 451 propnotify(XEvent *e)
 452 {
 453         XPropertyEvent *xpev;
 454         Atom clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 455
 456         xpev = &e->xproperty;
 457         if (xpev->state == PropertyNewValue &&
 458                         (xpev->atom == XA_PRIMARY ||
 459                          xpev->atom == clipboard)) {
 460                 selnotify(e);
 461         }
 462 }
 463
 464 void
 465 selnotify(XEvent *e)
 466 {
 467         ulong nitems, ofs, rem;
 468         int format;
 469         uchar *data, *last, *repl;
 470         Atom type, incratom, property;
 471
 472         incratom = XInternAtom(xw.dpy, "INCR", 0);
 473
 474         ofs = 0;
 475         if (e->type == SelectionNotify) {
 476                 property = e->xselection.property;
 477         } else if(e->type == PropertyNotify) {
 478                 property = e->xproperty.atom;
 479         } else {
 480                 return;
 481         }
 482         if (property == None)
 483                 return;
 484
 485         do {
 486                 if (XGetWindowProperty(xw.dpy, xw.win, property, ofs,
 487                                         BUFSIZ/4, False, AnyPropertyType,
 488                                         &type, &format, &nitems, &rem,
 489                                         &data)) {
 490                         fprintf(stderr, "Clipboard allocation failed\n");
 491                         return;
 492                 }
 493
 494                 if (e->type == PropertyNotify && nitems == 0 && rem == 0) {
 495                         /*
 496                          * If there is some PropertyNotify with no data, then
 497                          * this is the signal of the selection owner that all
 498                          * data has been transferred. We won't need to receive
 499                          * PropertyNotify events anymore.
 500                          */
 501                         MODBIT(xw.attrs.event_mask, 0, PropertyChangeMask);
 502                         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
 503                                         &xw.attrs);
 504                 }
 505
 506                 if (type == incratom) {
 507                         /*
 508                          * Activate the PropertyNotify events so we receive
 509                          * when the selection owner does send us the next
 510                          * chunk of data.
 511                          */
 512                         MODBIT(xw.attrs.event_mask, 1, PropertyChangeMask);
 513                         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
 514                                         &xw.attrs);
 515
 516                         /*
 517                          * Deleting the property is the transfer start signal.
 518                          */
 519                         XDeleteProperty(xw.dpy, xw.win, (int)property);
 520                         continue;
 521                 }
 522
 523                 /*
 524                  * As seen in getsel:
 525                  * Line endings are inconsistent in the terminal and GUI world
 526                  * copy and pasting. When receiving some selection data,
 527                  * replace all '\n' with '\r'.
 528                  * FIXME: Fix the computer world.
 529                  */
 530                 repl = data;
 531                 last = data + nitems * format / 8;
 532                 while ((repl = memchr(repl, '\n', last - repl))) {
 533                         *repl++ = '\r';
 534                 }
 535
 536                 if (IS_SET(MODE_BRCKTPASTE) && ofs == 0)
 537                         ttywrite("\033[200~", 6);
 538                 ttysend((char *)data, nitems * format / 8);
 539                 if (IS_SET(MODE_BRCKTPASTE) && rem == 0)
 540                         ttywrite("\033[201~", 6);
 541                 XFree(data);
 542                 /* number of 32-bit chunks returned */
 543                 ofs += nitems * format / 32;
 544         } while (rem > 0);
 545
 546         /*
 547          * Deleting the property again tells the selection owner to send the
 548          * next data chunk in the property.
 549          */
 550         XDeleteProperty(xw.dpy, xw.win, (int)property);
 551 }
 552
 553 void
 554 xclipcopy(void)
 555 {
 556         clipcopy(NULL);
 557 }
 558
 559 void
 560 selclear_(XEvent *e)
 561 {
 562         selclear();
 563 }
 564
 565 void
 566 selrequest(XEvent *e)
 567 {
 568         XSelectionRequestEvent *xsre;
 569         XSelectionEvent xev;
 570         Atom xa_targets, string, clipboard;
 571         char *seltext;
 572
 573         xsre = (XSelectionRequestEvent *) e;
 574         xev.type = SelectionNotify;
 575         xev.requestor = xsre->requestor;
 576         xev.selection = xsre->selection;
 577         xev.target = xsre->target;
 578         xev.time = xsre->time;
 579         if (xsre->property == None)
 580                 xsre->property = xsre->target;
 581
 582         /* reject */
 583         xev.property = None;
 584
 585         xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
 586         if (xsre->target == xa_targets) {
 587                 /* respond with the supported type */
 588                 string = xsel.xtarget;
 589                 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
 590                                 XA_ATOM, 32, PropModeReplace,
 591                                 (uchar *) &string, 1);
 592                 xev.property = xsre->property;
 593         } else if (xsre->target == xsel.xtarget || xsre->target == XA_STRING) {
 594                 /*
 595                  * xith XA_STRING non ascii characters may be incorrect in the
 596                  * requestor. It is not our problem, use utf8.
 597                  */
 598                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 599                 if (xsre->selection == XA_PRIMARY) {
 600                         seltext = xsel.primary;
 601                 } else if (xsre->selection == clipboard) {
 602                         seltext = xsel.clipboard;
 603                 } else {
 604                         fprintf(stderr,
 605                                 "Unhandled clipboard selection 0x%lx\n",
 606                                 xsre->selection);
 607                         return;
 608                 }
 609                 if (seltext != NULL) {
 610                         XChangeProperty(xsre->display, xsre->requestor,
 611                                         xsre->property, xsre->target,
 612                                         8, PropModeReplace,
 613                                         (uchar *)seltext, strlen(seltext));
 614                         xev.property = xsre->property;
 615                 }
 616         }
 617
 618         /* all done, send a notification to the listener */
 619         if (!XSendEvent(xsre->display, xsre->requestor, 1, 0, (XEvent *) &xev))
 620                 fprintf(stderr, "Error sending SelectionNotify event\n");
 621 }
 622
 623 void
 624 setsel(char *str, Time t)
 625 {
 626         free(xsel.primary);
 627         xsel.primary = str;
 628
 629         XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
 630         if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
 631                 selclear_(NULL);
 632 }
 633
 634 void
 635 xsetsel(char *str)
 636 {
 637         setsel(str, CurrentTime);
 638 }
 639
 640 void
 641 brelease(XEvent *e)
 642 {
 643         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 644                 mousereport(e);
 645                 return;
 646         }
 647
 648         if (e->xbutton.button == Button2) {
 649                 selpaste(NULL);
 650         } else if (e->xbutton.button == Button1) {
 651                 if (sel.mode == SEL_READY) {
 652                         getbuttoninfo(e);
 653                         setsel(getsel(), e->xbutton.time);
 654                 } else
 655                         selclear_(NULL);
 656                 sel.mode = SEL_IDLE;
 657                 tsetdirt(sel.nb.y, sel.ne.y);
 658         }
 659 }
 660
 661 void
 662 bmotion(XEvent *e)
 663 {
 664         int oldey, oldex, oldsby, oldsey;
 665
 666         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 667                 mousereport(e);
 668                 return;
 669         }
 670
 671         if (!sel.mode)
 672                 return;
 673
 674         sel.mode = SEL_READY;
 675         oldey = sel.oe.y;
 676         oldex = sel.oe.x;
 677         oldsby = sel.nb.y;
 678         oldsey = sel.ne.y;
 679         getbuttoninfo(e);
 680
 681         if (oldey != sel.oe.y || oldex != sel.oe.x)
 682                 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
 683 }
 684
 685 void
 686 cresize(int width, int height)
 687 {
 688         int col, row;
 689
 690         if (width != 0)
 691                 win.w = width;
 692         if (height != 0)
 693                 win.h = height;
 694
 695         col = (win.w - 2 * borderpx) / win.cw;
 696         row = (win.h - 2 * borderpx) / win.ch;
 697
 698         tresize(col, row);
 699         xresize(col, row);
 700         ttyresize(win.tw, win.th);
 701 }
 702
 703 void
 704 xresize(int col, int row)
 705 {
 706         win.tw = MAX(1, col * win.cw);
 707         win.th = MAX(1, row * win.ch);
 708
 709         XFreePixmap(xw.dpy, xw.buf);
 710         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
 711                         DefaultDepth(xw.dpy, xw.scr));
 712         XftDrawChange(xw.draw, xw.buf);
 713         xclear(0, 0, win.w, win.h);
 714
 715         /* resize to new width */
 716         xw.specbuf = xrealloc(xw.specbuf, col * sizeof(GlyphFontSpec));
 717 }
 718
 719 ushort
 720 sixd_to_16bit(int x)
 721 {
 722         return x == 0 ? 0 : 0x3737 + 0x2828 * x;
 723 }
 724
 725 int
 726 xloadcolor(int i, const char *name, Color *ncolor)
 727 {
 728         XRenderColor color = { .alpha = 0xffff };
 729
 730         if (!name) {
 731                 if (BETWEEN(i, 16, 255)) { /* 256 color */
 732                         if (i < 6*6*6+16) { /* same colors as xterm */
 733                                 color.red   = sixd_to_16bit( ((i-16)/36)%6 );
 734                                 color.green = sixd_to_16bit( ((i-16)/6) %6 );
 735                                 color.blue  = sixd_to_16bit( ((i-16)/1) %6 );
 736                         } else { /* greyscale */
 737                                 color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
 738                                 color.green = color.blue = color.red;
 739                         }
 740                         return XftColorAllocValue(xw.dpy, xw.vis,
 741                                                   xw.cmap, &color, ncolor);
 742                 } else
 743                         name = colorname[i];
 744         }
 745
 746         return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
 747 }
 748
 749 void
 750 xloadcols(void)
 751 {
 752         int i;
 753         static int loaded;
 754         Color *cp;
 755
 756         dc.collen = MAX(LEN(colorname), 256);
 757         dc.col = xmalloc(dc.collen * sizeof(Color));
 758
 759         if (loaded) {
 760                 for (cp = dc.col; cp < &dc.col[dc.collen]; ++cp)
 761                         XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
 762         }
 763
 764         for (i = 0; i < dc.collen; i++)
 765                 if (!xloadcolor(i, NULL, &dc.col[i])) {
 766                         if (colorname[i])
 767                                 die("Could not allocate color '%s'\n", colorname[i]);
 768                         else
 769                                 die("Could not allocate color %d\n", i);
 770                 }
 771         loaded = 1;
 772 }
 773
 774 int
 775 xsetcolorname(int x, const char *name)
 776 {
 777         Color ncolor;
 778
 779         if (!BETWEEN(x, 0, dc.collen))
 780                 return 1;
 781
 782
 783         if (!xloadcolor(x, name, &ncolor))
 784                 return 1;
 785
 786         XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
 787         dc.col[x] = ncolor;
 788
 789         return 0;
 790 }
 791
 792 /*
 793  * Absolute coordinates.
 794  */
 795 void
 796 xclear(int x1, int y1, int x2, int y2)
 797 {
 798         XftDrawRect(xw.draw,
 799                         &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
 800                         x1, y1, x2-x1, y2-y1);
 801 }
 802
 803 void
 804 xhints(void)
 805 {
 806         XClassHint class = {opt_name ? opt_name : termname,
 807                             opt_class ? opt_class : termname};
 808         XWMHints wm = {.flags = InputHint, .input = 1};
 809         XSizeHints *sizeh = NULL;
 810
 811         sizeh = XAllocSizeHints();
 812
 813         sizeh->flags = PSize | PResizeInc | PBaseSize;
 814         sizeh->height = win.h;
 815         sizeh->width = win.w;
 816         sizeh->height_inc = win.ch;
 817         sizeh->width_inc = win.cw;
 818         sizeh->base_height = 2 * borderpx;
 819         sizeh->base_width = 2 * borderpx;
 820         if (xw.isfixed) {
 821                 sizeh->flags |= PMaxSize | PMinSize;
 822                 sizeh->min_width = sizeh->max_width = win.w;
 823                 sizeh->min_height = sizeh->max_height = win.h;
 824         }
 825         if (xw.gm & (XValue|YValue)) {
 826                 sizeh->flags |= USPosition | PWinGravity;
 827                 sizeh->x = xw.l;
 828                 sizeh->y = xw.t;
 829                 sizeh->win_gravity = xgeommasktogravity(xw.gm);
 830         }
 831
 832         XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
 833                         &class);
 834         XFree(sizeh);
 835 }
 836
 837 int
 838 xgeommasktogravity(int mask)
 839 {
 840         switch (mask & (XNegative|YNegative)) {
 841         case 0:
 842                 return NorthWestGravity;
 843         case XNegative:
 844                 return NorthEastGravity;
 845         case YNegative:
 846                 return SouthWestGravity;
 847         }
 848
 849         return SouthEastGravity;
 850 }
 851
 852 int
 853 xloadfont(Font *f, FcPattern *pattern)
 854 {
 855         FcPattern *configured;
 856         FcPattern *match;
 857         FcResult result;
 858         XGlyphInfo extents;
 859         int wantattr, haveattr;
 860
 861         /*
 862          * Manually configure instead of calling XftMatchFont
 863          * so that we can use the configured pattern for
 864          * "missing glyph" lookups.
 865          */
 866         configured = FcPatternDuplicate(pattern);
 867         if (!configured)
 868                 return 1;
 869
 870         FcConfigSubstitute(NULL, configured, FcMatchPattern);
 871         XftDefaultSubstitute(xw.dpy, xw.scr, configured);
 872
 873         match = FcFontMatch(NULL, configured, &result);
 874         if (!match) {
 875                 FcPatternDestroy(configured);
 876                 return 1;
 877         }
 878
 879         if (!(f->match = XftFontOpenPattern(xw.dpy, match))) {
 880                 FcPatternDestroy(configured);
 881                 FcPatternDestroy(match);
 882                 return 1;
 883         }
 884
 885         if ((XftPatternGetInteger(pattern, "slant", 0, &wantattr) ==
 886             XftResultMatch)) {
 887                 /*
 888                  * Check if xft was unable to find a font with the appropriate
 889                  * slant but gave us one anyway. Try to mitigate.
 890                  */
 891                 if ((XftPatternGetInteger(f->match->pattern, "slant", 0,
 892                     &haveattr) != XftResultMatch) || haveattr < wantattr) {
 893                         f->badslant = 1;
 894                         fputs("st: font slant does not match\n", stderr);
 895                 }
 896         }
 897
 898         if ((XftPatternGetInteger(pattern, "weight", 0, &wantattr) ==
 899             XftResultMatch)) {
 900                 if ((XftPatternGetInteger(f->match->pattern, "weight", 0,
 901                     &haveattr) != XftResultMatch) || haveattr != wantattr) {
 902                         f->badweight = 1;
 903                         fputs("st: font weight does not match\n", stderr);
 904                 }
 905         }
 906
 907         XftTextExtentsUtf8(xw.dpy, f->match,
 908                 (const FcChar8 *) ascii_printable,
 909                 strlen(ascii_printable), &extents);
 910
 911         f->set = NULL;
 912         f->pattern = configured;
 913
 914         f->ascent = f->match->ascent;
 915         f->descent = f->match->descent;
 916         f->lbearing = 0;
 917         f->rbearing = f->match->max_advance_width;
 918
 919         f->height = f->ascent + f->descent;
 920         f->width = DIVCEIL(extents.xOff, strlen(ascii_printable));
 921
 922         return 0;
 923 }
 924
 925 void
 926 xloadfonts(char *fontstr, double fontsize)
 927 {
 928         FcPattern *pattern;
 929         double fontval;
 930         float ceilf(float);
 931
 932         if (fontstr[0] == '-') {
 933                 pattern = XftXlfdParse(fontstr, False, False);
 934         } else {
 935                 pattern = FcNameParse((FcChar8 *)fontstr);
 936         }
 937
 938         if (!pattern)
 939                 die("st: can't open font %s\n", fontstr);
 940
 941         if (fontsize > 1) {
 942                 FcPatternDel(pattern, FC_PIXEL_SIZE);
 943                 FcPatternDel(pattern, FC_SIZE);
 944                 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
 945                 usedfontsize = fontsize;
 946         } else {
 947                 if (FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval) ==
 948                                 FcResultMatch) {
 949                         usedfontsize = fontval;
 950                 } else if (FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval) ==
 951                                 FcResultMatch) {
 952                         usedfontsize = -1;
 953                 } else {
 954                         /*
 955                          * Default font size is 12, if none given. This is to
 956                          * have a known usedfontsize value.
 957                          */
 958                         FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
 959                         usedfontsize = 12;
 960                 }
 961                 defaultfontsize = usedfontsize;
 962         }
 963
 964         if (xloadfont(&dc.font, pattern))
 965                 die("st: can't open font %s\n", fontstr);
 966
 967         if (usedfontsize < 0) {
 968                 FcPatternGetDouble(dc.font.match->pattern,
 969                                    FC_PIXEL_SIZE, 0, &fontval);
 970                 usedfontsize = fontval;
 971                 if (fontsize == 0)
 972                         defaultfontsize = fontval;
 973         }
 974
 975         /* Setting character width and height. */
 976         win.cw = ceilf(dc.font.width * cwscale);
 977         win.ch = ceilf(dc.font.height * chscale);
 978
 979         FcPatternDel(pattern, FC_SLANT);
 980         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
 981         if (xloadfont(&dc.ifont, pattern))
 982                 die("st: can't open font %s\n", fontstr);
 983
 984         FcPatternDel(pattern, FC_WEIGHT);
 985         FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
 986         if (xloadfont(&dc.ibfont, pattern))
 987                 die("st: can't open font %s\n", fontstr);
 988
 989         FcPatternDel(pattern, FC_SLANT);
 990         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
 991         if (xloadfont(&dc.bfont, pattern))
 992                 die("st: can't open font %s\n", fontstr);
 993
 994         FcPatternDestroy(pattern);
 995 }
 996
 997 void
 998 xunloadfont(Font *f)
 999 {
1000         XftFontClose(xw.dpy, f->match);
1001         FcPatternDestroy(f->pattern);
1002         if (f->set)
1003                 FcFontSetDestroy(f->set);
1004 }
1005
1006 void
1007 xunloadfonts(void)
1008 {
1009         /* Free the loaded fonts in the font cache.  */
1010         while (frclen > 0)
1011                 XftFontClose(xw.dpy, frc[--frclen].font);
1012
1013         xunloadfont(&dc.font);
1014         xunloadfont(&dc.bfont);
1015         xunloadfont(&dc.ifont);
1016         xunloadfont(&dc.ibfont);
1017 }
1018
1019 void
1020 xinit(void)
1021 {
1022         XGCValues gcvalues;
1023         Cursor cursor;
1024         Window parent;
1025         pid_t thispid = getpid();
1026         XColor xmousefg, xmousebg;
1027
1028         if (!(xw.dpy = XOpenDisplay(NULL)))
1029                 die("Can't open display\n");
1030         xw.scr = XDefaultScreen(xw.dpy);
1031         xw.vis = XDefaultVisual(xw.dpy, xw.scr);
1032
1033         /* font */
1034         if (!FcInit())
1035                 die("Could not init fontconfig.\n");
1036
1037         usedfont = (opt_font == NULL)? font : opt_font;
1038         xloadfonts(usedfont, 0);
1039
1040         /* colors */
1041         xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1042         xloadcols();
1043
1044         /* adjust fixed window geometry */
1045         win.w = 2 * borderpx + term.col * win.cw;
1046         win.h = 2 * borderpx + term.row * win.ch;
1047         if (xw.gm & XNegative)
1048                 xw.l += DisplayWidth(xw.dpy, xw.scr) - win.w - 2;
1049         if (xw.gm & YNegative)
1050                 xw.t += DisplayHeight(xw.dpy, xw.scr) - win.h - 2;
1051
1052         /* Events */
1053         xw.attrs.background_pixel = dc.col[defaultbg].pixel;
1054         xw.attrs.border_pixel = dc.col[defaultbg].pixel;
1055         xw.attrs.bit_gravity = NorthWestGravity;
1056         xw.attrs.event_mask = FocusChangeMask | KeyPressMask
1057                 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1058                 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
1059         xw.attrs.colormap = xw.cmap;
1060
1061         if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
1062                 parent = XRootWindow(xw.dpy, xw.scr);
1063         xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
1064                         win.w, win.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
1065                         xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
1066                         | CWEventMask | CWColormap, &xw.attrs);
1067
1068         memset(&gcvalues, 0, sizeof(gcvalues));
1069         gcvalues.graphics_exposures = False;
1070         dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
1071                         &gcvalues);
1072         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
1073                         DefaultDepth(xw.dpy, xw.scr));
1074         XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
1075         XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, win.w, win.h);
1076
1077         /* font spec buffer */
1078         xw.specbuf = xmalloc(term.col * sizeof(GlyphFontSpec));
1079
1080         /* Xft rendering context */
1081         xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
1082
1083         /* input methods */
1084         if ((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
1085                 XSetLocaleModifiers("@im=local");
1086                 if ((xw.xim =  XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
1087                         XSetLocaleModifiers("@im=");
1088                         if ((xw.xim = XOpenIM(xw.dpy,
1089                                         NULL, NULL, NULL)) == NULL) {
1090                                 die("XOpenIM failed. Could not open input"
1091                                         " device.\n");
1092                         }
1093                 }
1094         }
1095         xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
1096                                            | XIMStatusNothing, XNClientWindow, xw.win,
1097                                            XNFocusWindow, xw.win, NULL);
1098         if (xw.xic == NULL)
1099                 die("XCreateIC failed. Could not obtain input method.\n");
1100
1101         /* white cursor, black outline */
1102         cursor = XCreateFontCursor(xw.dpy, mouseshape);
1103         XDefineCursor(xw.dpy, xw.win, cursor);
1104
1105         if (XParseColor(xw.dpy, xw.cmap, colorname[mousefg], &xmousefg) == 0) {
1106                 xmousefg.red   = 0xffff;
1107                 xmousefg.green = 0xffff;
1108                 xmousefg.blue  = 0xffff;
1109         }
1110
1111         if (XParseColor(xw.dpy, xw.cmap, colorname[mousebg], &xmousebg) == 0) {
1112                 xmousebg.red   = 0x0000;
1113                 xmousebg.green = 0x0000;
1114                 xmousebg.blue  = 0x0000;
1115         }
1116
1117         XRecolorCursor(xw.dpy, cursor, &xmousefg, &xmousebg);
1118
1119         xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
1120         xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
1121         xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
1122         XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
1123
1124         xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
1125         XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
1126                         PropModeReplace, (uchar *)&thispid, 1);
1127
1128         resettitle();
1129         XMapWindow(xw.dpy, xw.win);
1130         xhints();
1131         XSync(xw.dpy, False);
1132
1133         clock_gettime(CLOCK_MONOTONIC, &xsel.tclick1);
1134         clock_gettime(CLOCK_MONOTONIC, &xsel.tclick2);
1135         xsel.primary = NULL;
1136         xsel.clipboard = NULL;
1137         xsel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
1138         if (xsel.xtarget == None)
1139                 xsel.xtarget = XA_STRING;
1140 }
1141
1142 int
1143 xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x, int y)
1144 {
1145         float winx = borderpx + x * win.cw, winy = borderpx + y * win.ch, xp, yp;
1146         ushort mode, prevmode = USHRT_MAX;
1147         Font *font = &dc.font;
1148         int frcflags = FRC_NORMAL;
1149         float runewidth = win.cw;
1150         Rune rune;
1151         FT_UInt glyphidx;
1152         FcResult fcres;
1153         FcPattern *fcpattern, *fontpattern;
1154         FcFontSet *fcsets[] = { NULL };
1155         FcCharSet *fccharset;
1156         int i, f, numspecs = 0;
1157
1158         for (i = 0, xp = winx, yp = winy + font->ascent; i < len; ++i) {
1159                 /* Fetch rune and mode for current glyph. */
1160                 rune = glyphs[i].u;
1161                 mode = glyphs[i].mode;
1162
1163                 /* Skip dummy wide-character spacing. */
1164                 if (mode == ATTR_WDUMMY)
1165                         continue;
1166
1167                 /* Determine font for glyph if different from previous glyph. */
1168                 if (prevmode != mode) {
1169                         prevmode = mode;
1170                         font = &dc.font;
1171                         frcflags = FRC_NORMAL;
1172                         runewidth = win.cw * ((mode & ATTR_WIDE) ? 2.0f : 1.0f);
1173                         if ((mode & ATTR_ITALIC) && (mode & ATTR_BOLD)) {
1174                                 font = &dc.ibfont;
1175                                 frcflags = FRC_ITALICBOLD;
1176                         } else if (mode & ATTR_ITALIC) {
1177                                 font = &dc.ifont;
1178                                 frcflags = FRC_ITALIC;
1179                         } else if (mode & ATTR_BOLD) {
1180                                 font = &dc.bfont;
1181                                 frcflags = FRC_BOLD;
1182                         }
1183                         yp = winy + font->ascent;
1184                 }
1185
1186                 /* Lookup character index with default font. */
1187                 glyphidx = XftCharIndex(xw.dpy, font->match, rune);
1188                 if (glyphidx) {
1189                         specs[numspecs].font = font->match;
1190                         specs[numspecs].glyph = glyphidx;
1191                         specs[numspecs].x = (short)xp;
1192                         specs[numspecs].y = (short)yp;
1193                         xp += runewidth;
1194                         numspecs++;
1195                         continue;
1196                 }
1197
1198                 /* Fallback on font cache, search the font cache for match. */
1199                 for (f = 0; f < frclen; f++) {
1200                         glyphidx = XftCharIndex(xw.dpy, frc[f].font, rune);
1201                         /* Everything correct. */
1202                         if (glyphidx && frc[f].flags == frcflags)
1203                                 break;
1204                         /* We got a default font for a not found glyph. */
1205                         if (!glyphidx && frc[f].flags == frcflags
1206                                         && frc[f].unicodep == rune) {
1207                                 break;
1208                         }
1209                 }
1210
1211                 /* Nothing was found. Use fontconfig to find matching font. */
1212                 if (f >= frclen) {
1213                         if (!font->set)
1214                                 font->set = FcFontSort(0, font->pattern,
1215                                                        1, 0, &fcres);
1216                         fcsets[0] = font->set;
1217
1218                         /*
1219                          * Nothing was found in the cache. Now use
1220                          * some dozen of Fontconfig calls to get the
1221                          * font for one single character.
1222                          *
1223                          * Xft and fontconfig are design failures.
1224                          */
1225                         fcpattern = FcPatternDuplicate(font->pattern);
1226                         fccharset = FcCharSetCreate();
1227
1228                         FcCharSetAddChar(fccharset, rune);
1229                         FcPatternAddCharSet(fcpattern, FC_CHARSET,
1230                                         fccharset);
1231                         FcPatternAddBool(fcpattern, FC_SCALABLE, 1);
1232
1233                         FcConfigSubstitute(0, fcpattern,
1234                                         FcMatchPattern);
1235                         FcDefaultSubstitute(fcpattern);
1236
1237                         fontpattern = FcFontSetMatch(0, fcsets, 1,
1238                                         fcpattern, &fcres);
1239
1240                         /*
1241                          * Overwrite or create the new cache entry.
1242                          */
1243                         if (frclen >= LEN(frc)) {
1244                                 frclen = LEN(frc) - 1;
1245                                 XftFontClose(xw.dpy, frc[frclen].font);
1246                                 frc[frclen].unicodep = 0;
1247                         }
1248
1249                         frc[frclen].font = XftFontOpenPattern(xw.dpy,
1250                                         fontpattern);
1251                         if (!frc[frclen].font)
1252                                 die("XftFontOpenPattern failed seeking fallback font: %s\n",
1253                                         strerror(errno));
1254                         frc[frclen].flags = frcflags;
1255                         frc[frclen].unicodep = rune;
1256
1257                         glyphidx = XftCharIndex(xw.dpy, frc[frclen].font, rune);
1258
1259                         f = frclen;
1260                         frclen++;
1261
1262                         FcPatternDestroy(fcpattern);
1263                         FcCharSetDestroy(fccharset);
1264                 }
1265
1266                 specs[numspecs].font = frc[f].font;
1267                 specs[numspecs].glyph = glyphidx;
1268                 specs[numspecs].x = (short)xp;
1269                 specs[numspecs].y = (short)yp;
1270                 xp += runewidth;
1271                 numspecs++;
1272         }
1273
1274         return numspecs;
1275 }
1276
1277 void
1278 xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, int y)
1279 {
1280         int charlen = len * ((base.mode & ATTR_WIDE) ? 2 : 1);
1281         int winx = borderpx + x * win.cw, winy = borderpx + y * win.ch,
1282             width = charlen * win.cw;
1283         Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
1284         XRenderColor colfg, colbg;
1285         XRectangle r;
1286
1287         /* Fallback on color display for attributes not supported by the font */
1288         if (base.mode & ATTR_ITALIC && base.mode & ATTR_BOLD) {
1289                 if (dc.ibfont.badslant || dc.ibfont.badweight)
1290                         base.fg = defaultattr;
1291         } else if ((base.mode & ATTR_ITALIC && dc.ifont.badslant) ||
1292             (base.mode & ATTR_BOLD && dc.bfont.badweight)) {
1293                 base.fg = defaultattr;
1294         }
1295
1296         if (IS_TRUECOL(base.fg)) {
1297                 colfg.alpha = 0xffff;
1298                 colfg.red = TRUERED(base.fg);
1299                 colfg.green = TRUEGREEN(base.fg);
1300                 colfg.blue = TRUEBLUE(base.fg);
1301                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
1302                 fg = &truefg;
1303         } else {
1304                 fg = &dc.col[base.fg];
1305         }
1306
1307         if (IS_TRUECOL(base.bg)) {
1308                 colbg.alpha = 0xffff;
1309                 colbg.green = TRUEGREEN(base.bg);
1310                 colbg.red = TRUERED(base.bg);
1311                 colbg.blue = TRUEBLUE(base.bg);
1312                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
1313                 bg = &truebg;
1314         } else {
1315                 bg = &dc.col[base.bg];
1316         }
1317
1318         /* Change basic system colors [0-7] to bright system colors [8-15] */
1319         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_BOLD && BETWEEN(base.fg, 0, 7))
1320                 fg = &dc.col[base.fg + 8];
1321
1322         if (IS_SET(MODE_REVERSE)) {
1323                 if (fg == &dc.col[defaultfg]) {
1324                         fg = &dc.col[defaultbg];
1325                 } else {
1326                         colfg.red = ~fg->color.red;
1327                         colfg.green = ~fg->color.green;
1328                         colfg.blue = ~fg->color.blue;
1329                         colfg.alpha = fg->color.alpha;
1330                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
1331                                         &revfg);
1332                         fg = &revfg;
1333                 }
1334
1335                 if (bg == &dc.col[defaultbg]) {
1336                         bg = &dc.col[defaultfg];
1337                 } else {
1338                         colbg.red = ~bg->color.red;
1339                         colbg.green = ~bg->color.green;
1340                         colbg.blue = ~bg->color.blue;
1341                         colbg.alpha = bg->color.alpha;
1342                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
1343                                         &revbg);
1344                         bg = &revbg;
1345                 }
1346         }
1347
1348         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_FAINT) {
1349                 colfg.red = fg->color.red / 2;
1350                 colfg.green = fg->color.green / 2;
1351                 colfg.blue = fg->color.blue / 2;
1352                 colfg.alpha = fg->color.alpha;
1353                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
1354                 fg = &revfg;
1355         }
1356
1357
1358         if (base.mode & ATTR_REVERSE) {
1359                 temp = fg;
1360                 fg = bg;
1361                 bg = temp;
1362         }
1363
1364         if (base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
1365                 fg = bg;
1366
1367         if (base.mode & ATTR_INVISIBLE)
1368                 fg = bg;
1369
1370         /* Intelligent cleaning up of the borders. */
1371         if (x == 0) {
1372                 xclear(0, (y == 0)? 0 : winy, borderpx,
1373                         winy + win.ch + ((y >= term.row-1)? win.h : 0));
1374         }
1375         if (x + charlen >= term.col) {
1376                 xclear(winx + width, (y == 0)? 0 : winy, win.w,
1377                         ((y >= term.row-1)? win.h : (winy + win.ch)));
1378         }
1379         if (y == 0)
1380                 xclear(winx, 0, winx + width, borderpx);
1381         if (y == term.row-1)
1382                 xclear(winx, winy + win.ch, winx + width, win.h);
1383
1384         /* Clean up the region we want to draw to. */
1385         XftDrawRect(xw.draw, bg, winx, winy, width, win.ch);
1386
1387         /* Set the clip region because Xft is sometimes dirty. */
1388         r.x = 0;
1389         r.y = 0;
1390         r.height = win.ch;
1391         r.width = width;
1392         XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
1393
1394         /* Render the glyphs. */
1395         XftDrawGlyphFontSpec(xw.draw, fg, specs, len);
1396
1397         /* Render underline and strikethrough. */
1398         if (base.mode & ATTR_UNDERLINE) {
1399                 XftDrawRect(xw.draw, fg, winx, winy + dc.font.ascent + 1,
1400                                 width, 1);
1401         }
1402
1403         if (base.mode & ATTR_STRUCK) {
1404                 XftDrawRect(xw.draw, fg, winx, winy + 2 * dc.font.ascent / 3,
1405                                 width, 1);
1406         }
1407
1408         /* Reset clip to none. */
1409         XftDrawSetClip(xw.draw, 0);
1410 }
1411
1412 void
1413 xdrawglyph(Glyph g, int x, int y)
1414 {
1415         int numspecs;
1416         XftGlyphFontSpec spec;
1417
1418         numspecs = xmakeglyphfontspecs(&spec, &g, 1, x, y);
1419         xdrawglyphfontspecs(&spec, g, numspecs, x, y);
1420 }
1421
1422 void
1423 xdrawcursor(void)
1424 {
1425         static int oldx = 0, oldy = 0;
1426         int curx;
1427         Glyph g = {' ', ATTR_NULL, defaultbg, defaultcs}, og;
1428         Color drawcol;
1429
1430         LIMIT(oldx, 0, term.col-1);
1431         LIMIT(oldy, 0, term.row-1);
1432
1433         curx = term.c.x;
1434
1435         /* adjust position if in dummy */
1436         if (term.line[oldy][oldx].mode & ATTR_WDUMMY)
1437                 oldx--;
1438         if (term.line[term.c.y][curx].mode & ATTR_WDUMMY)
1439                 curx--;
1440
1441         /* remove the old cursor */
1442         og = term.line[oldy][oldx];
1443         if (selected(oldx, oldy))
1444                 og.mode ^= ATTR_REVERSE;
1445         xdrawglyph(og, oldx, oldy);
1446
1447         g.u = term.line[term.c.y][term.c.x].u;
1448         g.mode |= term.line[term.c.y][term.c.x].mode &
1449                   (ATTR_BOLD | ATTR_ITALIC | ATTR_UNDERLINE | ATTR_STRUCK);
1450
1451         /*
1452          * Select the right color for the right mode.
1453          */
1454         if (IS_SET(MODE_REVERSE)) {
1455                 g.mode |= ATTR_REVERSE;
1456                 g.bg = defaultfg;
1457                 if (selected(term.c.x, term.c.y)) {
1458                         drawcol = dc.col[defaultcs];
1459                         g.fg = defaultrcs;
1460                 } else {
1461                         drawcol = dc.col[defaultrcs];
1462                         g.fg = defaultcs;
1463                 }
1464         } else {
1465                 if (selected(term.c.x, term.c.y)) {
1466                         drawcol = dc.col[defaultrcs];
1467                         g.fg = defaultfg;
1468                         g.bg = defaultrcs;
1469                 } else {
1470                         drawcol = dc.col[defaultcs];
1471                 }
1472         }
1473
1474         if (IS_SET(MODE_HIDE))
1475                 return;
1476
1477         /* draw the new one */
1478         if (win.state & WIN_FOCUSED) {
1479                 switch (win.cursor) {
1480                 case 7: /* st extension: snowman */
1481                         utf8decode("☃", &g.u, UTF_SIZ);
1482                 case 0: /* Blinking Block */
1483                 case 1: /* Blinking Block (Default) */
1484                 case 2: /* Steady Block */
1485                         g.mode |= term.line[term.c.y][curx].mode & ATTR_WIDE;
1486                         xdrawglyph(g, term.c.x, term.c.y);
1487                         break;
1488                 case 3: /* Blinking Underline */
1489                 case 4: /* Steady Underline */
1490                         XftDrawRect(xw.draw, &drawcol,
1491                                         borderpx + curx * win.cw,
1492                                         borderpx + (term.c.y + 1) * win.ch - \
1493                                                 cursorthickness,
1494                                         win.cw, cursorthickness);
1495                         break;
1496                 case 5: /* Blinking bar */
1497                 case 6: /* Steady bar */
1498                         XftDrawRect(xw.draw, &drawcol,
1499                                         borderpx + curx * win.cw,
1500                                         borderpx + term.c.y * win.ch,
1501                                         cursorthickness, win.ch);
1502                         break;
1503                 }
1504         } else {
1505                 XftDrawRect(xw.draw, &drawcol,
1506                                 borderpx + curx * win.cw,
1507                                 borderpx + term.c.y * win.ch,
1508                                 win.cw - 1, 1);
1509                 XftDrawRect(xw.draw, &drawcol,
1510                                 borderpx + curx * win.cw,
1511                                 borderpx + term.c.y * win.ch,
1512                                 1, win.ch - 1);
1513                 XftDrawRect(xw.draw, &drawcol,
1514                                 borderpx + (curx + 1) * win.cw - 1,
1515                                 borderpx + term.c.y * win.ch,
1516                                 1, win.ch - 1);
1517                 XftDrawRect(xw.draw, &drawcol,
1518                                 borderpx + curx * win.cw,
1519                                 borderpx + (term.c.y + 1) * win.ch - 1,
1520                                 win.cw, 1);
1521         }
1522         oldx = curx, oldy = term.c.y;
1523 }
1524
1525 void
1526 xsetenv(void)
1527 {
1528         char buf[sizeof(long) * 8 + 1];
1529
1530         snprintf(buf, sizeof(buf), "%lu", xw.win);
1531         setenv("WINDOWID", buf, 1);
1532 }
1533
1534 void
1535 xsettitle(char *p)
1536 {
1537         XTextProperty prop;
1538         DEFAULT(p, "st");
1539
1540         Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
1541                         &prop);
1542         XSetWMName(xw.dpy, xw.win, &prop);
1543         XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
1544         XFree(prop.value);
1545 }
1546
1547 void
1548 draw(void)
1549 {
1550         drawregion(0, 0, term.col, term.row);
1551         XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, win.w,
1552                         win.h, 0, 0);
1553         XSetForeground(xw.dpy, dc.gc,
1554                         dc.col[IS_SET(MODE_REVERSE)?
1555                                 defaultfg : defaultbg].pixel);
1556 }
1557
1558 void
1559 drawregion(int x1, int y1, int x2, int y2)
1560 {
1561         int i, x, y, ox, numspecs;
1562         Glyph base, new;
1563         XftGlyphFontSpec *specs;
1564
1565         if (!(win.state & WIN_VISIBLE))
1566                 return;
1567
1568         for (y = y1; y < y2; y++) {
1569                 if (!term.dirty[y])
1570                         continue;
1571
1572                 term.dirty[y] = 0;
1573
1574                 specs = xw.specbuf;
1575                 numspecs = xmakeglyphfontspecs(specs, &term.line[y][x1], x2 - x1, x1, y);
1576
1577                 i = ox = 0;
1578                 for (x = x1; x < x2 && i < numspecs; x++) {
1579                         new = term.line[y][x];
1580                         if (new.mode == ATTR_WDUMMY)
1581                                 continue;
1582                         if (selected(x, y))
1583                                 new.mode ^= ATTR_REVERSE;
1584                         if (i > 0 && ATTRCMP(base, new)) {
1585                                 xdrawglyphfontspecs(specs, base, i, ox, y);
1586                                 specs += i;
1587                                 numspecs -= i;
1588                                 i = 0;
1589                         }
1590                         if (i == 0) {
1591                                 ox = x;
1592                                 base = new;
1593                         }
1594                         i++;
1595                 }
1596                 if (i > 0)
1597                         xdrawglyphfontspecs(specs, base, i, ox, y);
1598         }
1599         xdrawcursor();
1600 }
1601
1602 void
1603 expose(XEvent *ev)
1604 {
1605         redraw();
1606 }
1607
1608 void
1609 visibility(XEvent *ev)
1610 {
1611         XVisibilityEvent *e = &ev->xvisibility;
1612
1613         MODBIT(win.state, e->state != VisibilityFullyObscured, WIN_VISIBLE);
1614 }
1615
1616 void
1617 unmap(XEvent *ev)
1618 {
1619         win.state &= ~WIN_VISIBLE;
1620 }
1621
1622 void
1623 xsetpointermotion(int set)
1624 {
1625         MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
1626         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
1627 }
1628
1629 int
1630 xsetcursor(int cursor)
1631 {
1632         DEFAULT(cursor, 1);
1633         if (!BETWEEN(cursor, 0, 6))
1634                 return 1;
1635         win.cursor = cursor;
1636         return 0;
1637 }
1638
1639 void
1640 xseturgency(int add)
1641 {
1642         XWMHints *h = XGetWMHints(xw.dpy, xw.win);
1643
1644         MODBIT(h->flags, add, XUrgencyHint);
1645         XSetWMHints(xw.dpy, xw.win, h);
1646         XFree(h);
1647 }
1648
1649 void
1650 xbell(void)
1651 {
1652         if (!(win.state & WIN_FOCUSED))
1653                 xseturgency(1);
1654         if (bellvolume)
1655                 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
1656 }
1657
1658 void
1659 focus(XEvent *ev)
1660 {
1661         XFocusChangeEvent *e = &ev->xfocus;
1662
1663         if (e->mode == NotifyGrab)
1664                 return;
1665
1666         if (ev->type == FocusIn) {
1667                 XSetICFocus(xw.xic);
1668                 win.state |= WIN_FOCUSED;
1669                 xseturgency(0);
1670                 if (IS_SET(MODE_FOCUS))
1671                         ttywrite("\033[I", 3);
1672         } else {
1673                 XUnsetICFocus(xw.xic);
1674                 win.state &= ~WIN_FOCUSED;
1675                 if (IS_SET(MODE_FOCUS))
1676                         ttywrite("\033[O", 3);
1677         }
1678 }
1679
1680 int
1681 match(uint mask, uint state)
1682 {
1683         return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
1684 }
1685
1686 char*
1687 kmap(KeySym k, uint state)
1688 {
1689         Key *kp;
1690         int i;
1691
1692         /* Check for mapped keys out of X11 function keys. */
1693         for (i = 0; i < LEN(mappedkeys); i++) {
1694                 if (mappedkeys[i] == k)
1695                         break;
1696         }
1697         if (i == LEN(mappedkeys)) {
1698                 if ((k & 0xFFFF) < 0xFD00)
1699                         return NULL;
1700         }
1701
1702         for (kp = key; kp < key + LEN(key); kp++) {
1703                 if (kp->k != k)
1704                         continue;
1705
1706                 if (!match(kp->mask, state))
1707                         continue;
1708
1709                 if (IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
1710                         continue;
1711                 if (term.numlock && kp->appkey == 2)
1712                         continue;
1713
1714                 if (IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
1715                         continue;
1716
1717                 if (IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
1718                         continue;
1719
1720                 return kp->s;
1721         }
1722
1723         return NULL;
1724 }
1725
1726 void
1727 kpress(XEvent *ev)
1728 {
1729         XKeyEvent *e = &ev->xkey;
1730         KeySym ksym;
1731         char buf[32], *customkey;
1732         int len;
1733         Rune c;
1734         Status status;
1735         Shortcut *bp;
1736
1737         if (IS_SET(MODE_KBDLOCK))
1738                 return;
1739
1740         len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
1741         /* 1. shortcuts */
1742         for (bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
1743                 if (ksym == bp->keysym && match(bp->mod, e->state)) {
1744                         bp->func(&(bp->arg));
1745                         return;
1746                 }
1747         }
1748
1749         /* 2. custom keys from config.h */
1750         if ((customkey = kmap(ksym, e->state))) {
1751                 ttysend(customkey, strlen(customkey));
1752                 return;
1753         }
1754
1755         /* 3. composed string from input method */
1756         if (len == 0)
1757                 return;
1758         if (len == 1 && e->state & Mod1Mask) {
1759                 if (IS_SET(MODE_8BIT)) {
1760                         if (*buf < 0177) {
1761                                 c = *buf | 0x80;
1762                                 len = utf8encode(c, buf);
1763                         }
1764                 } else {
1765                         buf[1] = buf[0];
1766                         buf[0] = '\033';
1767                         len = 2;
1768                 }
1769         }
1770         ttysend(buf, len);
1771 }
1772
1773
1774 void
1775 cmessage(XEvent *e)
1776 {
1777         /*
1778          * See xembed specs
1779          *  http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
1780          */
1781         if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
1782                 if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
1783                         win.state |= WIN_FOCUSED;
1784                         xseturgency(0);
1785                 } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
1786                         win.state &= ~WIN_FOCUSED;
1787                 }
1788         } else if (e->xclient.data.l[0] == xw.wmdeletewin) {
1789                 /* Send SIGHUP to shell */
1790                 kill(pid, SIGHUP);
1791                 exit(0);
1792         }
1793 }
1794
1795 void
1796 resize(XEvent *e)
1797 {
1798         if (e->xconfigure.width == win.w && e->xconfigure.height == win.h)
1799                 return;
1800
1801         cresize(e->xconfigure.width, e->xconfigure.height);
1802 }
1803
1804 void
1805 run(void)
1806 {
1807         XEvent ev;
1808         int w = win.w, h = win.h;
1809         fd_set rfd;
1810         int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
1811         struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
1812         long deltatime;
1813
1814         /* Waiting for window mapping */
1815         do {
1816                 XNextEvent(xw.dpy, &ev);
1817                 /*
1818                  * This XFilterEvent call is required because of XOpenIM. It
1819                  * does filter out the key event and some client message for
1820                  * the input method too.
1821                  */
1822                 if (XFilterEvent(&ev, None))
1823                         continue;
1824                 if (ev.type == ConfigureNotify) {
1825                         w = ev.xconfigure.width;
1826                         h = ev.xconfigure.height;
1827                 }
1828         } while (ev.type != MapNotify);
1829
1830         ttynew(opt_line, opt_io, opt_cmd);
1831         cresize(w, h);
1832
1833         clock_gettime(CLOCK_MONOTONIC, &last);
1834         lastblink = last;
1835
1836         for (xev = actionfps;;) {
1837                 FD_ZERO(&rfd);
1838                 FD_SET(cmdfd, &rfd);
1839                 FD_SET(xfd, &rfd);
1840
1841                 if (pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
1842                         if (errno == EINTR)
1843                                 continue;
1844                         die("select failed: %s\n", strerror(errno));
1845                 }
1846                 if (FD_ISSET(cmdfd, &rfd)) {
1847                         ttyread();
1848                         if (blinktimeout) {
1849                                 blinkset = tattrset(ATTR_BLINK);
1850                                 if (!blinkset)
1851                                         MODBIT(term.mode, 0, MODE_BLINK);
1852                         }
1853                 }
1854
1855                 if (FD_ISSET(xfd, &rfd))
1856                         xev = actionfps;
1857
1858                 clock_gettime(CLOCK_MONOTONIC, &now);
1859                 drawtimeout.tv_sec = 0;
1860                 drawtimeout.tv_nsec =  (1000 * 1E6)/ xfps;
1861                 tv = &drawtimeout;
1862
1863                 dodraw = 0;
1864                 if (blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
1865                         tsetdirtattr(ATTR_BLINK);
1866                         term.mode ^= MODE_BLINK;
1867                         lastblink = now;
1868                         dodraw = 1;
1869                 }
1870                 deltatime = TIMEDIFF(now, last);
1871                 if (deltatime > 1000 / (xev ? xfps : actionfps)) {
1872                         dodraw = 1;
1873                         last = now;
1874                 }
1875
1876                 if (dodraw) {
1877                         while (XPending(xw.dpy)) {
1878                                 XNextEvent(xw.dpy, &ev);
1879                                 if (XFilterEvent(&ev, None))
1880                                         continue;
1881                                 if (handler[ev.type])
1882                                         (handler[ev.type])(&ev);
1883                         }
1884
1885                         draw();
1886                         XFlush(xw.dpy);
1887
1888                         if (xev && !FD_ISSET(xfd, &rfd))
1889                                 xev--;
1890                         if (!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
1891                                 if (blinkset) {
1892                                         if (TIMEDIFF(now, lastblink) \
1893                                                         > blinktimeout) {
1894                                                 drawtimeout.tv_nsec = 1000;
1895                                         } else {
1896                                                 drawtimeout.tv_nsec = (1E6 * \
1897                                                         (blinktimeout - \
1898                                                         TIMEDIFF(now,
1899                                                                 lastblink)));
1900                                         }
1901                                         drawtimeout.tv_sec = \
1902                                             drawtimeout.tv_nsec / 1E9;
1903                                         drawtimeout.tv_nsec %= (long)1E9;
1904                                 } else {
1905                                         tv = NULL;
1906                                 }
1907                         }
1908                 }
1909         }
1910 }
1911
1912 void
1913 usage(void)
1914 {
1915         die("usage: %s [-aiv] [-c class] [-f font] [-g geometry]"
1916             " [-n name] [-o file]\n"
1917             "          [-T title] [-t title] [-w windowid]"
1918             " [[-e] command [args ...]]\n"
1919             "       %s [-aiv] [-c class] [-f font] [-g geometry]"
1920             " [-n name] [-o file]\n"
1921             "          [-T title] [-t title] [-w windowid] -l line"
1922             " [stty_args ...]\n", argv0, argv0);
1923 }
1924
1925 int
1926 main(int argc, char *argv[])
1927 {
1928         xw.l = xw.t = 0;
1929         xw.isfixed = False;
1930         win.cursor = cursorshape;
1931
1932         ARGBEGIN {
1933         case 'a':
1934                 allowaltscreen = 0;
1935                 break;
1936         case 'c':
1937                 opt_class = EARGF(usage());
1938                 break;
1939         case 'e':
1940                 if (argc > 0)
1941                         --argc, ++argv;
1942                 goto run;
1943         case 'f':
1944                 opt_font = EARGF(usage());
1945                 break;
1946         case 'g':
1947                 xw.gm = XParseGeometry(EARGF(usage()),
1948                                 &xw.l, &xw.t, &cols, &rows);
1949                 break;
1950         case 'i':
1951                 xw.isfixed = 1;
1952                 break;
1953         case 'o':
1954                 opt_io = EARGF(usage());
1955                 break;
1956         case 'l':
1957                 opt_line = EARGF(usage());
1958                 break;
1959         case 'n':
1960                 opt_name = EARGF(usage());
1961                 break;
1962         case 't':
1963         case 'T':
1964                 opt_title = EARGF(usage());
1965                 break;
1966         case 'w':
1967                 opt_embed = EARGF(usage());
1968                 break;
1969         case 'v':
1970                 die("%s " VERSION " (c) 2010-2016 st engineers\n", argv0);
1971                 break;
1972         default:
1973                 usage();
1974         } ARGEND;
1975
1976 run:
1977         if (argc > 0) {
1978                 /* eat all remaining arguments */
1979                 opt_cmd = argv;
1980                 if (!opt_title && !opt_line)
1981                         opt_title = basename(xstrdup(argv[0]));
1982         }
1983         setlocale(LC_CTYPE, "");
1984         XSetLocaleModifiers("");
1985         tnew(MAX(cols, 1), MAX(rows, 1));
1986         xinit();
1987         xsetenv();
1988         selinit();
1989         run();
1990
1991         return 0;
1992 }