x.c

   1 /* See LICENSE for license details. */
   2 #include <errno.h>
   3 #include <math.h>
   4 #include <limits.h>
   5 #include <locale.h>
   6 #include <signal.h>
   7 #include <sys/select.h>
   8 #include <time.h>
   9 #include <unistd.h>
  10 #include <libgen.h>
  11 #include <X11/Xatom.h>
  12 #include <X11/Xlib.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 } Key;
  45
  46 /* X modifiers */
  47 #define XK_ANY_MOD    UINT_MAX
  48 #define XK_NO_MOD     0
  49 #define XK_SWITCH_MOD (1<<13)
  50
  51 /* alpha */
  52 #define OPAQUE 0Xff
  53 #define USE_ARGB (alpha != OPAQUE && opt_embed == NULL)
  54
  55 /* function definitions used in config.h */
  56 static void clipcopy(const Arg *);
  57 static void clippaste(const Arg *);
  58 static void numlock(const Arg *);
  59 static void selpaste(const Arg *);
  60 static void zoom(const Arg *);
  61 static void zoomabs(const Arg *);
  62 static void zoomreset(const Arg *);
  63
  64 /* config.h for applying patches and the configuration. */
  65 #include "config.h"
  66
  67 /* XEMBED messages */
  68 #define XEMBED_FOCUS_IN  4
  69 #define XEMBED_FOCUS_OUT 5
  70
  71 /* macros */
  72 #define IS_SET(flag)            ((win.mode & (flag)) != 0)
  73 #define TRUERED(x)              (((x) & 0xff0000) >> 8)
  74 #define TRUEGREEN(x)            (((x) & 0xff00))
  75 #define TRUEBLUE(x)             (((x) & 0xff) << 8)
  76
  77 typedef XftDraw *Draw;
  78 typedef XftColor Color;
  79 typedef XftGlyphFontSpec GlyphFontSpec;
  80
  81 /* Purely graphic info */
  82 typedef struct {
  83         int tw, th; /* tty width and height */
  84         int w, h; /* window width and height */
  85         int ch; /* char height */
  86         int cw; /* char width  */
  87         int mode; /* window state/mode flags */
  88         int cursor; /* cursor style */
  89 } TermWindow;
  90
  91 typedef struct {
  92         Display *dpy;
  93         Colormap cmap;
  94         Window win;
  95         Drawable buf;
  96         GlyphFontSpec *specbuf; /* font spec buffer used for rendering */
  97         Atom xembed, wmdeletewin, netwmname, netwmpid;
  98         XIM xim;
  99         XIC xic;
 100         Draw draw;
 101         Visual *vis;
 102         XSetWindowAttributes attrs;
 103         int scr;
 104         int isfixed; /* is fixed geometry? */
 105         int depth; /* bit depth */
 106         int l, t; /* left and top offset */
 107         int gm; /* geometry mask */
 108 } XWindow;
 109
 110 typedef struct {
 111         Atom xtarget;
 112         char *primary, *clipboard;
 113         struct timespec tclick1;
 114         struct timespec tclick2;
 115 } XSelection;
 116
 117 /* Font structure */
 118 #define Font Font_
 119 typedef struct {
 120         int height;
 121         int width;
 122         int ascent;
 123         int descent;
 124         int badslant;
 125         int badweight;
 126         short lbearing;
 127         short rbearing;
 128         XftFont *match;
 129         FcFontSet *set;
 130         FcPattern *pattern;
 131 } Font;
 132
 133 /* Drawing Context */
 134 typedef struct {
 135         Color *col;
 136         size_t collen;
 137         Font font, bfont, ifont, ibfont;
 138         GC gc;
 139 } DC;
 140
 141 static inline ushort sixd_to_16bit(int);
 142 static int xmakeglyphfontspecs(XftGlyphFontSpec *, const Glyph *, int, int, int);
 143 static void xdrawglyphfontspecs(const XftGlyphFontSpec *, Glyph, int, int, int);
 144 static void xdrawglyph(Glyph, int, int);
 145 static void xclear(int, int, int, int);
 146 static int xgeommasktogravity(int);
 147 static void xinit(int, int);
 148 static void cresize(int, int);
 149 static void xresize(int, int);
 150 static void xhints(void);
 151 static int xloadcolor(int, const char *, Color *);
 152 static int xloadfont(Font *, FcPattern *);
 153 static void xloadfonts(char *, double);
 154 static void xunloadfont(Font *);
 155 static void xunloadfonts(void);
 156 static void xsetenv(void);
 157 static void xseturgency(int);
 158 static int evcol(XEvent *);
 159 static int evrow(XEvent *);
 160
 161 static void expose(XEvent *);
 162 static void visibility(XEvent *);
 163 static void unmap(XEvent *);
 164 static void kpress(XEvent *);
 165 static void cmessage(XEvent *);
 166 static void resize(XEvent *);
 167 static void focus(XEvent *);
 168 static void brelease(XEvent *);
 169 static void bpress(XEvent *);
 170 static void bmotion(XEvent *);
 171 static void propnotify(XEvent *);
 172 static void selnotify(XEvent *);
 173 static void selclear_(XEvent *);
 174 static void selrequest(XEvent *);
 175 static void setsel(char *, Time);
 176 static void mousesel(XEvent *, int);
 177 static void mousereport(XEvent *);
 178 static char *kmap(KeySym, uint);
 179 static int match(uint, uint);
 180
 181 static void run(void);
 182 static void usage(void);
 183
 184 static void (*handler[LASTEvent])(XEvent *) = {
 185         [KeyPress] = kpress,
 186         [ClientMessage] = cmessage,
 187         [ConfigureNotify] = resize,
 188         [VisibilityNotify] = visibility,
 189         [UnmapNotify] = unmap,
 190         [Expose] = expose,
 191         [FocusIn] = focus,
 192         [FocusOut] = focus,
 193         [MotionNotify] = bmotion,
 194         [ButtonPress] = bpress,
 195         [ButtonRelease] = brelease,
 196 /*
 197  * Uncomment if you want the selection to disappear when you select something
 198  * different in another window.
 199  */
 200 /*      [SelectionClear] = selclear_, */
 201         [SelectionNotify] = selnotify,
 202 /*
 203  * PropertyNotify is only turned on when there is some INCR transfer happening
 204  * for the selection retrieval.
 205  */
 206         [PropertyNotify] = propnotify,
 207         [SelectionRequest] = selrequest,
 208 };
 209
 210 /* Globals */
 211 static DC dc;
 212 static XWindow xw;
 213 static XSelection xsel;
 214 static TermWindow win;
 215
 216 /* Font Ring Cache */
 217 enum {
 218         FRC_NORMAL,
 219         FRC_ITALIC,
 220         FRC_BOLD,
 221         FRC_ITALICBOLD
 222 };
 223
 224 typedef struct {
 225         XftFont *font;
 226         int flags;
 227         Rune unicodep;
 228 } Fontcache;
 229
 230 /* Fontcache is an array now. A new font will be appended to the array. */
 231 static Fontcache frc[16];
 232 static int frclen = 0;
 233 static char *usedfont = NULL;
 234 static double usedfontsize = 0;
 235 static double defaultfontsize = 0;
 236
 237 static char *opt_class = NULL;
 238 static char **opt_cmd  = NULL;
 239 static char *opt_embed = NULL;
 240 static char *opt_font  = NULL;
 241 static char *opt_io    = NULL;
 242 static char *opt_line  = NULL;
 243 static char *opt_name  = NULL;
 244 static char *opt_title = NULL;
 245
 246 static int oldbutton = 3; /* button event on startup: 3 = release */
 247
 248 void
 249 clipcopy(const Arg *dummy)
 250 {
 251         Atom clipboard;
 252
 253         free(xsel.clipboard);
 254         xsel.clipboard = NULL;
 255
 256         if (xsel.primary != NULL) {
 257                 xsel.clipboard = xstrdup(xsel.primary);
 258                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 259                 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
 260         }
 261 }
 262
 263 void
 264 clippaste(const Arg *dummy)
 265 {
 266         Atom clipboard;
 267
 268         clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 269         XConvertSelection(xw.dpy, clipboard, xsel.xtarget, clipboard,
 270                         xw.win, CurrentTime);
 271 }
 272
 273 void
 274 selpaste(const Arg *dummy)
 275 {
 276         XConvertSelection(xw.dpy, XA_PRIMARY, xsel.xtarget, XA_PRIMARY,
 277                         xw.win, CurrentTime);
 278 }
 279
 280 void
 281 numlock(const Arg *dummy)
 282 {
 283         win.mode ^= MODE_NUMLOCK;
 284 }
 285
 286 void
 287 zoom(const Arg *arg)
 288 {
 289         Arg larg;
 290
 291         larg.f = usedfontsize + arg->f;
 292         zoomabs(&larg);
 293 }
 294
 295 void
 296 zoomabs(const Arg *arg)
 297 {
 298         xunloadfonts();
 299         xloadfonts(usedfont, arg->f);
 300         cresize(0, 0);
 301         redraw();
 302         xhints();
 303 }
 304
 305 void
 306 zoomreset(const Arg *arg)
 307 {
 308         Arg larg;
 309
 310         if (defaultfontsize > 0) {
 311                 larg.f = defaultfontsize;
 312                 zoomabs(&larg);
 313         }
 314 }
 315
 316 int
 317 evcol(XEvent *e)
 318 {
 319         int x = e->xbutton.x - borderpx;
 320         LIMIT(x, 0, win.tw - 1);
 321         return x / win.cw;
 322 }
 323
 324 int
 325 evrow(XEvent *e)
 326 {
 327         int y = e->xbutton.y - borderpx;
 328         LIMIT(y, 0, win.th - 1);
 329         return y / win.ch;
 330 }
 331
 332 void
 333 mousesel(XEvent *e, int done)
 334 {
 335         int type, seltype = SEL_REGULAR;
 336         uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
 337
 338         for (type = 1; type < LEN(selmasks); ++type) {
 339                 if (match(selmasks[type], state)) {
 340                         seltype = type;
 341                         break;
 342                 }
 343         }
 344         selextend(evcol(e), evrow(e), seltype, done);
 345         if (done)
 346                 setsel(getsel(), e->xbutton.time);
 347 }
 348
 349 void
 350 mousereport(XEvent *e)
 351 {
 352         int len, x = evcol(e), y = evrow(e),
 353             button = e->xbutton.button, state = e->xbutton.state;
 354         char buf[40];
 355         static int ox, oy;
 356
 357         /* from urxvt */
 358         if (e->xbutton.type == MotionNotify) {
 359                 if (x == ox && y == oy)
 360                         return;
 361                 if (!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
 362                         return;
 363                 /* MOUSE_MOTION: no reporting if no button is pressed */
 364                 if (IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
 365                         return;
 366
 367                 button = oldbutton + 32;
 368                 ox = x;
 369                 oy = y;
 370         } else {
 371                 if (!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
 372                         button = 3;
 373                 } else {
 374                         button -= Button1;
 375                         if (button >= 3)
 376                                 button += 64 - 3;
 377                 }
 378                 if (e->xbutton.type == ButtonPress) {
 379                         oldbutton = button;
 380                         ox = x;
 381                         oy = y;
 382                 } else if (e->xbutton.type == ButtonRelease) {
 383                         oldbutton = 3;
 384                         /* MODE_MOUSEX10: no button release reporting */
 385                         if (IS_SET(MODE_MOUSEX10))
 386                                 return;
 387                         if (button == 64 || button == 65)
 388                                 return;
 389                 }
 390         }
 391
 392         if (!IS_SET(MODE_MOUSEX10)) {
 393                 button += ((state & ShiftMask  ) ? 4  : 0)
 394                         + ((state & Mod4Mask   ) ? 8  : 0)
 395                         + ((state & ControlMask) ? 16 : 0);
 396         }
 397
 398         if (IS_SET(MODE_MOUSESGR)) {
 399                 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
 400                                 button, x+1, y+1,
 401                                 e->xbutton.type == ButtonRelease ? 'm' : 'M');
 402         } else if (x < 223 && y < 223) {
 403                 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
 404                                 32+button, 32+x+1, 32+y+1);
 405         } else {
 406                 return;
 407         }
 408
 409         ttywrite(buf, len, 0);
 410 }
 411
 412 void
 413 bpress(XEvent *e)
 414 {
 415         struct timespec now;
 416         MouseShortcut *ms;
 417         int snap;
 418
 419         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 420                 mousereport(e);
 421                 return;
 422         }
 423
 424         for (ms = mshortcuts; ms < mshortcuts + LEN(mshortcuts); ms++) {
 425                 if (e->xbutton.button == ms->b
 426                                 && match(ms->mask, e->xbutton.state)) {
 427                         ttywrite(ms->s, strlen(ms->s), 1);
 428                         return;
 429                 }
 430         }
 431
 432         if (e->xbutton.button == Button1) {
 433                 /*
 434                  * If the user clicks below predefined timeouts specific
 435                  * snapping behaviour is exposed.
 436                  */
 437                 clock_gettime(CLOCK_MONOTONIC, &now);
 438                 if (TIMEDIFF(now, xsel.tclick2) <= tripleclicktimeout) {
 439                         snap = SNAP_LINE;
 440                 } else if (TIMEDIFF(now, xsel.tclick1) <= doubleclicktimeout) {
 441                         snap = SNAP_WORD;
 442                 } else {
 443                         snap = 0;
 444                 }
 445                 xsel.tclick2 = xsel.tclick1;
 446                 xsel.tclick1 = now;
 447
 448                 selstart(evcol(e), evrow(e), snap);
 449         }
 450 }
 451
 452 void
 453 propnotify(XEvent *e)
 454 {
 455         XPropertyEvent *xpev;
 456         Atom clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 457
 458         xpev = &e->xproperty;
 459         if (xpev->state == PropertyNewValue &&
 460                         (xpev->atom == XA_PRIMARY ||
 461                          xpev->atom == clipboard)) {
 462                 selnotify(e);
 463         }
 464 }
 465
 466 void
 467 selnotify(XEvent *e)
 468 {
 469         ulong nitems, ofs, rem;
 470         int format;
 471         uchar *data, *last, *repl;
 472         Atom type, incratom, property = None;
 473
 474         incratom = XInternAtom(xw.dpy, "INCR", 0);
 475
 476         ofs = 0;
 477         if (e->type == SelectionNotify)
 478                 property = e->xselection.property;
 479         else if (e->type == PropertyNotify)
 480                 property = e->xproperty.atom;
 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, 0);
 538                 ttywrite((char *)data, nitems * format / 8, 1);
 539                 if (IS_SET(MODE_BRCKTPASTE) && rem == 0)
 540                         ttywrite("\033[201~", 6, 0);
 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         if (!str)
 627                 return;
 628
 629         free(xsel.primary);
 630         xsel.primary = str;
 631
 632         XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
 633         if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
 634                 selclear();
 635 }
 636
 637 void
 638 xsetsel(char *str)
 639 {
 640         setsel(str, CurrentTime);
 641 }
 642
 643 void
 644 brelease(XEvent *e)
 645 {
 646         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 647                 mousereport(e);
 648                 return;
 649         }
 650
 651         if (e->xbutton.button == Button2)
 652                 selpaste(NULL);
 653         else if (e->xbutton.button == Button1)
 654                 mousesel(e, 1);
 655 }
 656
 657 void
 658 bmotion(XEvent *e)
 659 {
 660         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 661                 mousereport(e);
 662                 return;
 663         }
 664
 665         mousesel(e, 0);
 666 }
 667
 668 void
 669 cresize(int width, int height)
 670 {
 671         int col, row;
 672
 673         if (width != 0)
 674                 win.w = width;
 675         if (height != 0)
 676                 win.h = height;
 677
 678         col = (win.w - 2 * borderpx) / win.cw;
 679         row = (win.h - 2 * borderpx) / win.ch;
 680
 681         tresize(col, row);
 682         xresize(col, row);
 683         ttyresize(win.tw, win.th);
 684 }
 685
 686 void
 687 xresize(int col, int row)
 688 {
 689         win.tw = MAX(1, col * win.cw);
 690         win.th = MAX(1, row * win.ch);
 691
 692         XFreePixmap(xw.dpy, xw.buf);
 693         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
 694                         xw.depth);
 695         XftDrawChange(xw.draw, xw.buf);
 696         xclear(0, 0, win.w, win.h);
 697
 698         /* resize to new width */
 699         xw.specbuf = xrealloc(xw.specbuf, col * sizeof(GlyphFontSpec));
 700 }
 701
 702 ushort
 703 sixd_to_16bit(int x)
 704 {
 705         return x == 0 ? 0 : 0x3737 + 0x2828 * x;
 706 }
 707
 708 int
 709 xloadcolor(int i, const char *name, Color *ncolor)
 710 {
 711         XRenderColor color = { .alpha = 0xffff };
 712
 713         if (!name) {
 714                 if (BETWEEN(i, 16, 255)) { /* 256 color */
 715                         if (i < 6*6*6+16) { /* same colors as xterm */
 716                                 color.red   = sixd_to_16bit( ((i-16)/36)%6 );
 717                                 color.green = sixd_to_16bit( ((i-16)/6) %6 );
 718                                 color.blue  = sixd_to_16bit( ((i-16)/1) %6 );
 719                         } else { /* greyscale */
 720                                 color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
 721                                 color.green = color.blue = color.red;
 722                         }
 723                         return XftColorAllocValue(xw.dpy, xw.vis,
 724                                                   xw.cmap, &color, ncolor);
 725                 } else
 726                         name = colorname[i];
 727         }
 728
 729         return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
 730 }
 731
 732 void
 733 xloadcols(void)
 734 {
 735         int i;
 736         static int loaded;
 737         Color *cp;
 738
 739         dc.collen = MAX(LEN(colorname), 256);
 740         dc.col = xmalloc(dc.collen * sizeof(Color));
 741
 742         if (loaded) {
 743                 for (cp = dc.col; cp < &dc.col[dc.collen]; ++cp)
 744                         XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
 745         }
 746
 747         for (i = 0; i < dc.collen; i++)
 748                 if (!xloadcolor(i, NULL, &dc.col[i])) {
 749                         if (colorname[i])
 750                                 die("could not allocate color '%s'\n", colorname[i]);
 751                         else
 752                                 die("could not allocate color %d\n", i);
 753                 }
 754
 755         /* set alpha value of bg color */
 756         if (USE_ARGB) {
 757                 dc.col[defaultbg].color.alpha = (0xffff * alpha) / OPAQUE;
 758                 dc.col[defaultbg].pixel &= 0x00111111;
 759                 dc.col[defaultbg].pixel |= alpha << 24;
 760         }
 761         loaded = 1;
 762 }
 763
 764 int
 765 xsetcolorname(int x, const char *name)
 766 {
 767         Color ncolor;
 768
 769         if (!BETWEEN(x, 0, dc.collen))
 770                 return 1;
 771
 772
 773         if (!xloadcolor(x, name, &ncolor))
 774                 return 1;
 775
 776         XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
 777         dc.col[x] = ncolor;
 778
 779         return 0;
 780 }
 781
 782 void
 783 xtermclear(int col1, int row1, int col2, int row2)
 784 {
 785         XftDrawRect(xw.draw,
 786                         &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
 787                         borderpx + col1 * win.cw,
 788                         borderpx + row1 * win.ch,
 789                         (col2-col1+1) * win.cw,
 790                         (row2-row1+1) * win.ch);
 791 }
 792
 793 /*
 794  * Absolute coordinates.
 795  */
 796 void
 797 xclear(int x1, int y1, int x2, int y2)
 798 {
 799         XftDrawRect(xw.draw,
 800                         &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
 801                         x1, y1, x2-x1, y2-y1);
 802 }
 803
 804 void
 805 xhints(void)
 806 {
 807         XClassHint class = {opt_name ? opt_name : termname,
 808                             opt_class ? opt_class : termname};
 809         XWMHints wm = {.flags = InputHint, .input = 1};
 810         XSizeHints *sizeh;
 811
 812         sizeh = XAllocSizeHints();
 813
 814         sizeh->flags = PSize | PResizeInc | PBaseSize;
 815         sizeh->height = win.h;
 816         sizeh->width = win.w;
 817         sizeh->height_inc = win.ch;
 818         sizeh->width_inc = win.cw;
 819         sizeh->base_height = 2 * borderpx;
 820         sizeh->base_width = 2 * borderpx;
 821         if (xw.isfixed) {
 822                 sizeh->flags |= PMaxSize | PMinSize;
 823                 sizeh->min_width = sizeh->max_width = win.w;
 824                 sizeh->min_height = sizeh->max_height = win.h;
 825         }
 826         if (xw.gm & (XValue|YValue)) {
 827                 sizeh->flags |= USPosition | PWinGravity;
 828                 sizeh->x = xw.l;
 829                 sizeh->y = xw.t;
 830                 sizeh->win_gravity = xgeommasktogravity(xw.gm);
 831         }
 832
 833         XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
 834                         &class);
 835         XFree(sizeh);
 836 }
 837
 838 int
 839 xgeommasktogravity(int mask)
 840 {
 841         switch (mask & (XNegative|YNegative)) {
 842         case 0:
 843                 return NorthWestGravity;
 844         case XNegative:
 845                 return NorthEastGravity;
 846         case YNegative:
 847                 return SouthWestGravity;
 848         }
 849
 850         return SouthEastGravity;
 851 }
 852
 853 int
 854 xloadfont(Font *f, FcPattern *pattern)
 855 {
 856         FcPattern *configured;
 857         FcPattern *match;
 858         FcResult result;
 859         XGlyphInfo extents;
 860         int wantattr, haveattr;
 861
 862         /*
 863          * Manually configure instead of calling XftMatchFont
 864          * so that we can use the configured pattern for
 865          * "missing glyph" lookups.
 866          */
 867         configured = FcPatternDuplicate(pattern);
 868         if (!configured)
 869                 return 1;
 870
 871         FcConfigSubstitute(NULL, configured, FcMatchPattern);
 872         XftDefaultSubstitute(xw.dpy, xw.scr, configured);
 873
 874         match = FcFontMatch(NULL, configured, &result);
 875         if (!match) {
 876                 FcPatternDestroy(configured);
 877                 return 1;
 878         }
 879
 880         if (!(f->match = XftFontOpenPattern(xw.dpy, match))) {
 881                 FcPatternDestroy(configured);
 882                 FcPatternDestroy(match);
 883                 return 1;
 884         }
 885
 886         if ((XftPatternGetInteger(pattern, "slant", 0, &wantattr) ==
 887             XftResultMatch)) {
 888                 /*
 889                  * Check if xft was unable to find a font with the appropriate
 890                  * slant but gave us one anyway. Try to mitigate.
 891                  */
 892                 if ((XftPatternGetInteger(f->match->pattern, "slant", 0,
 893                     &haveattr) != XftResultMatch) || haveattr < wantattr) {
 894                         f->badslant = 1;
 895                         fputs("font slant does not match\n", stderr);
 896                 }
 897         }
 898
 899         if ((XftPatternGetInteger(pattern, "weight", 0, &wantattr) ==
 900             XftResultMatch)) {
 901                 if ((XftPatternGetInteger(f->match->pattern, "weight", 0,
 902                     &haveattr) != XftResultMatch) || haveattr != wantattr) {
 903                         f->badweight = 1;
 904                         fputs("font weight does not match\n", stderr);
 905                 }
 906         }
 907
 908         XftTextExtentsUtf8(xw.dpy, f->match,
 909                 (const FcChar8 *) ascii_printable,
 910                 strlen(ascii_printable), &extents);
 911
 912         f->set = NULL;
 913         f->pattern = configured;
 914
 915         f->ascent = f->match->ascent;
 916         f->descent = f->match->descent;
 917         f->lbearing = 0;
 918         f->rbearing = f->match->max_advance_width;
 919
 920         f->height = f->ascent + f->descent;
 921         f->width = DIVCEIL(extents.xOff, strlen(ascii_printable));
 922
 923         return 0;
 924 }
 925
 926 void
 927 xloadfonts(char *fontstr, double fontsize)
 928 {
 929         FcPattern *pattern;
 930         double fontval;
 931
 932         if (fontstr[0] == '-')
 933                 pattern = XftXlfdParse(fontstr, False, False);
 934         else
 935                 pattern = FcNameParse((FcChar8 *)fontstr);
 936
 937         if (!pattern)
 938                 die("can't open font %s\n", fontstr);
 939
 940         if (fontsize > 1) {
 941                 FcPatternDel(pattern, FC_PIXEL_SIZE);
 942                 FcPatternDel(pattern, FC_SIZE);
 943                 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
 944                 usedfontsize = fontsize;
 945         } else {
 946                 if (FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval) ==
 947                                 FcResultMatch) {
 948                         usedfontsize = fontval;
 949                 } else if (FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval) ==
 950                                 FcResultMatch) {
 951                         usedfontsize = -1;
 952                 } else {
 953                         /*
 954                          * Default font size is 12, if none given. This is to
 955                          * have a known usedfontsize value.
 956                          */
 957                         FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
 958                         usedfontsize = 12;
 959                 }
 960                 defaultfontsize = usedfontsize;
 961         }
 962
 963         if (xloadfont(&dc.font, pattern))
 964                 die("can't open font %s\n", fontstr);
 965
 966         if (usedfontsize < 0) {
 967                 FcPatternGetDouble(dc.font.match->pattern,
 968                                    FC_PIXEL_SIZE, 0, &fontval);
 969                 usedfontsize = fontval;
 970                 if (fontsize == 0)
 971                         defaultfontsize = fontval;
 972         }
 973
 974         /* Setting character width and height. */
 975         win.cw = ceilf(dc.font.width * cwscale);
 976         win.ch = ceilf(dc.font.height * chscale);
 977
 978         FcPatternDel(pattern, FC_SLANT);
 979         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
 980         if (xloadfont(&dc.ifont, pattern))
 981                 die("can't open font %s\n", fontstr);
 982
 983         FcPatternDel(pattern, FC_WEIGHT);
 984         FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
 985         if (xloadfont(&dc.ibfont, pattern))
 986                 die("can't open font %s\n", fontstr);
 987
 988         FcPatternDel(pattern, FC_SLANT);
 989         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
 990         if (xloadfont(&dc.bfont, pattern))
 991                 die("can't open font %s\n", fontstr);
 992
 993         FcPatternDestroy(pattern);
 994 }
 995
 996 void
 997 xunloadfont(Font *f)
 998 {
 999         XftFontClose(xw.dpy, f->match);
1000         FcPatternDestroy(f->pattern);
1001         if (f->set)
1002                 FcFontSetDestroy(f->set);
1003 }
1004
1005 void
1006 xunloadfonts(void)
1007 {
1008         /* Free the loaded fonts in the font cache.  */
1009         while (frclen > 0)
1010                 XftFontClose(xw.dpy, frc[--frclen].font);
1011
1012         xunloadfont(&dc.font);
1013         xunloadfont(&dc.bfont);
1014         xunloadfont(&dc.ifont);
1015         xunloadfont(&dc.ibfont);
1016 }
1017
1018 void
1019 xinit(int cols, int rows)
1020 {
1021         XGCValues gcvalues;
1022         Cursor cursor;
1023         Window parent;
1024         pid_t thispid = getpid();
1025         XColor xmousefg, xmousebg;
1026
1027         if (!(xw.dpy = XOpenDisplay(NULL)))
1028                 die("can't open display\n");
1029         xw.scr = XDefaultScreen(xw.dpy);
1030         xw.depth = (USE_ARGB) ? 32: XDefaultDepth(xw.dpy, xw.scr);
1031         if (!USE_ARGB)
1032                 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
1033         else {
1034                 XVisualInfo *vis;
1035                 XRenderPictFormat *fmt;
1036                 int nvi;
1037                 int i;
1038
1039                 XVisualInfo tpl = {
1040                         .screen = xw.scr,
1041                         .depth = 32,
1042                         .class = TrueColor
1043                 };
1044
1045                 vis = XGetVisualInfo(xw.dpy,
1046                                 VisualScreenMask | VisualDepthMask | VisualClassMask,
1047                                 &tpl, &nvi);
1048                 xw.vis = NULL;
1049                 for (i = 0; i < nvi; i++) {
1050                         fmt = XRenderFindVisualFormat(xw.dpy, vis[i].visual);
1051                         if (fmt->type == PictTypeDirect && fmt->direct.alphaMask) {
1052                                 xw.vis = vis[i].visual;
1053                                 break;
1054                         }
1055                 }
1056
1057                 XFree(vis);
1058
1059                 if (!xw.vis) {
1060                         fprintf(stderr, "Couldn't find ARGB visual.\n");
1061                         exit(1);
1062                 }
1063         }
1064
1065         /* font */
1066         if (!FcInit())
1067                 die("could not init fontconfig.\n");
1068
1069         usedfont = (opt_font == NULL)? font : opt_font;
1070         xloadfonts(usedfont, 0);
1071
1072         /* colors */
1073         if (!USE_ARGB)
1074                 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1075         else
1076                 xw.cmap = XCreateColormap(xw.dpy, XRootWindow(xw.dpy, xw.scr),
1077                                 xw.vis, None);
1078         xloadcols();
1079
1080         /* adjust fixed window geometry */
1081         win.w = 2 * borderpx + cols * win.cw;
1082         win.h = 2 * borderpx + rows * win.ch;
1083         if (xw.gm & XNegative)
1084                 xw.l += DisplayWidth(xw.dpy, xw.scr) - win.w - 2;
1085         if (xw.gm & YNegative)
1086                 xw.t += DisplayHeight(xw.dpy, xw.scr) - win.h - 2;
1087
1088         /* Events */
1089         xw.attrs.background_pixel = dc.col[defaultbg].pixel;
1090         xw.attrs.border_pixel = dc.col[defaultbg].pixel;
1091         xw.attrs.bit_gravity = NorthWestGravity;
1092         xw.attrs.event_mask = FocusChangeMask | KeyPressMask
1093                 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1094                 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
1095         xw.attrs.colormap = xw.cmap;
1096
1097         if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
1098                 parent = XRootWindow(xw.dpy, xw.scr);
1099         xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
1100                         win.w, win.h, 0, xw.depth, InputOutput,
1101                         xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
1102                         | CWEventMask | CWColormap, &xw.attrs);
1103
1104         memset(&gcvalues, 0, sizeof(gcvalues));
1105         gcvalues.graphics_exposures = False;
1106         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h, xw.depth);
1107         dc.gc = XCreateGC(xw.dpy, (USE_ARGB) ? xw.buf: parent,
1108                         GCGraphicsExposures, &gcvalues);
1109         XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
1110         XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, win.w, win.h);
1111
1112         /* font spec buffer */
1113         xw.specbuf = xmalloc(cols * sizeof(GlyphFontSpec));
1114
1115         /* Xft rendering context */
1116         xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
1117
1118         /* input methods */
1119         if ((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
1120                 XSetLocaleModifiers("@im=local");
1121                 if ((xw.xim =  XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
1122                         XSetLocaleModifiers("@im=");
1123                         if ((xw.xim = XOpenIM(xw.dpy,
1124                                         NULL, NULL, NULL)) == NULL) {
1125                                 die("XOpenIM failed. Could not open input"
1126                                         " device.\n");
1127                         }
1128                 }
1129         }
1130         xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
1131                                            | XIMStatusNothing, XNClientWindow, xw.win,
1132                                            XNFocusWindow, xw.win, NULL);
1133         if (xw.xic == NULL)
1134                 die("XCreateIC failed. Could not obtain input method.\n");
1135
1136         /* white cursor, black outline */
1137         cursor = XCreateFontCursor(xw.dpy, mouseshape);
1138         XDefineCursor(xw.dpy, xw.win, cursor);
1139
1140         if (XParseColor(xw.dpy, xw.cmap, colorname[mousefg], &xmousefg) == 0) {
1141                 xmousefg.red   = 0xffff;
1142                 xmousefg.green = 0xffff;
1143                 xmousefg.blue  = 0xffff;
1144         }
1145
1146         if (XParseColor(xw.dpy, xw.cmap, colorname[mousebg], &xmousebg) == 0) {
1147                 xmousebg.red   = 0x0000;
1148                 xmousebg.green = 0x0000;
1149                 xmousebg.blue  = 0x0000;
1150         }
1151
1152         XRecolorCursor(xw.dpy, cursor, &xmousefg, &xmousebg);
1153
1154         xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
1155         xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
1156         xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
1157         XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
1158
1159         xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
1160         XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
1161                         PropModeReplace, (uchar *)&thispid, 1);
1162
1163         win.mode = MODE_NUMLOCK;
1164         resettitle();
1165         XMapWindow(xw.dpy, xw.win);
1166         xhints();
1167         XSync(xw.dpy, False);
1168
1169         clock_gettime(CLOCK_MONOTONIC, &xsel.tclick1);
1170         clock_gettime(CLOCK_MONOTONIC, &xsel.tclick2);
1171         xsel.primary = NULL;
1172         xsel.clipboard = NULL;
1173         xsel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
1174         if (xsel.xtarget == None)
1175                 xsel.xtarget = XA_STRING;
1176 }
1177
1178 int
1179 xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x, int y)
1180 {
1181         float winx = borderpx + x * win.cw, winy = borderpx + y * win.ch, xp, yp;
1182         ushort mode, prevmode = USHRT_MAX;
1183         Font *font = &dc.font;
1184         int frcflags = FRC_NORMAL;
1185         float runewidth = win.cw;
1186         Rune rune;
1187         FT_UInt glyphidx;
1188         FcResult fcres;
1189         FcPattern *fcpattern, *fontpattern;
1190         FcFontSet *fcsets[] = { NULL };
1191         FcCharSet *fccharset;
1192         int i, f, numspecs = 0;
1193
1194         for (i = 0, xp = winx, yp = winy + font->ascent; i < len; ++i) {
1195                 /* Fetch rune and mode for current glyph. */
1196                 rune = glyphs[i].u;
1197                 mode = glyphs[i].mode;
1198
1199                 /* Skip dummy wide-character spacing. */
1200                 if (mode == ATTR_WDUMMY)
1201                         continue;
1202
1203                 /* Determine font for glyph if different from previous glyph. */
1204                 if (prevmode != mode) {
1205                         prevmode = mode;
1206                         font = &dc.font;
1207                         frcflags = FRC_NORMAL;
1208                         runewidth = win.cw * ((mode & ATTR_WIDE) ? 2.0f : 1.0f);
1209                         if ((mode & ATTR_ITALIC) && (mode & ATTR_BOLD)) {
1210                                 font = &dc.ibfont;
1211                                 frcflags = FRC_ITALICBOLD;
1212                         } else if (mode & ATTR_ITALIC) {
1213                                 font = &dc.ifont;
1214                                 frcflags = FRC_ITALIC;
1215                         } else if (mode & ATTR_BOLD) {
1216                                 font = &dc.bfont;
1217                                 frcflags = FRC_BOLD;
1218                         }
1219                         yp = winy + font->ascent;
1220                 }
1221
1222                 /* Lookup character index with default font. */
1223                 glyphidx = XftCharIndex(xw.dpy, font->match, rune);
1224                 if (glyphidx) {
1225                         specs[numspecs].font = font->match;
1226                         specs[numspecs].glyph = glyphidx;
1227                         specs[numspecs].x = (short)xp;
1228                         specs[numspecs].y = (short)yp;
1229                         xp += runewidth;
1230                         numspecs++;
1231                         continue;
1232                 }
1233
1234                 /* Fallback on font cache, search the font cache for match. */
1235                 for (f = 0; f < frclen; f++) {
1236                         glyphidx = XftCharIndex(xw.dpy, frc[f].font, rune);
1237                         /* Everything correct. */
1238                         if (glyphidx && frc[f].flags == frcflags)
1239                                 break;
1240                         /* We got a default font for a not found glyph. */
1241                         if (!glyphidx && frc[f].flags == frcflags
1242                                         && frc[f].unicodep == rune) {
1243                                 break;
1244                         }
1245                 }
1246
1247                 /* Nothing was found. Use fontconfig to find matching font. */
1248                 if (f >= frclen) {
1249                         if (!font->set)
1250                                 font->set = FcFontSort(0, font->pattern,
1251                                                        1, 0, &fcres);
1252                         fcsets[0] = font->set;
1253
1254                         /*
1255                          * Nothing was found in the cache. Now use
1256                          * some dozen of Fontconfig calls to get the
1257                          * font for one single character.
1258                          *
1259                          * Xft and fontconfig are design failures.
1260                          */
1261                         fcpattern = FcPatternDuplicate(font->pattern);
1262                         fccharset = FcCharSetCreate();
1263
1264                         FcCharSetAddChar(fccharset, rune);
1265                         FcPatternAddCharSet(fcpattern, FC_CHARSET,
1266                                         fccharset);
1267                         FcPatternAddBool(fcpattern, FC_SCALABLE, 1);
1268
1269                         FcConfigSubstitute(0, fcpattern,
1270                                         FcMatchPattern);
1271                         FcDefaultSubstitute(fcpattern);
1272
1273                         fontpattern = FcFontSetMatch(0, fcsets, 1,
1274                                         fcpattern, &fcres);
1275
1276                         /*
1277                          * Overwrite or create the new cache entry.
1278                          */
1279                         if (frclen >= LEN(frc)) {
1280                                 frclen = LEN(frc) - 1;
1281                                 XftFontClose(xw.dpy, frc[frclen].font);
1282                                 frc[frclen].unicodep = 0;
1283                         }
1284
1285                         frc[frclen].font = XftFontOpenPattern(xw.dpy,
1286                                         fontpattern);
1287                         if (!frc[frclen].font)
1288                                 die("XftFontOpenPattern failed seeking fallback font: %s\n",
1289                                         strerror(errno));
1290                         frc[frclen].flags = frcflags;
1291                         frc[frclen].unicodep = rune;
1292
1293                         glyphidx = XftCharIndex(xw.dpy, frc[frclen].font, rune);
1294
1295                         f = frclen;
1296                         frclen++;
1297
1298                         FcPatternDestroy(fcpattern);
1299                         FcCharSetDestroy(fccharset);
1300                 }
1301
1302                 specs[numspecs].font = frc[f].font;
1303                 specs[numspecs].glyph = glyphidx;
1304                 specs[numspecs].x = (short)xp;
1305                 specs[numspecs].y = (short)yp;
1306                 xp += runewidth;
1307                 numspecs++;
1308         }
1309
1310         return numspecs;
1311 }
1312
1313 void
1314 xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, int y)
1315 {
1316         int charlen = len * ((base.mode & ATTR_WIDE) ? 2 : 1);
1317         int winx = borderpx + x * win.cw, winy = borderpx + y * win.ch,
1318             width = charlen * win.cw;
1319         Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
1320         XRenderColor colfg, colbg;
1321         XRectangle r;
1322
1323         /* Fallback on color display for attributes not supported by the font */
1324         if (base.mode & ATTR_ITALIC && base.mode & ATTR_BOLD) {
1325                 if (dc.ibfont.badslant || dc.ibfont.badweight)
1326                         base.fg = defaultattr;
1327         } else if ((base.mode & ATTR_ITALIC && dc.ifont.badslant) ||
1328             (base.mode & ATTR_BOLD && dc.bfont.badweight)) {
1329                 base.fg = defaultattr;
1330         }
1331
1332         if (IS_TRUECOL(base.fg)) {
1333                 colfg.alpha = 0xffff;
1334                 colfg.red = TRUERED(base.fg);
1335                 colfg.green = TRUEGREEN(base.fg);
1336                 colfg.blue = TRUEBLUE(base.fg);
1337                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
1338                 fg = &truefg;
1339         } else {
1340                 fg = &dc.col[base.fg];
1341         }
1342
1343         if (IS_TRUECOL(base.bg)) {
1344                 colbg.alpha = 0xffff;
1345                 colbg.green = TRUEGREEN(base.bg);
1346                 colbg.red = TRUERED(base.bg);
1347                 colbg.blue = TRUEBLUE(base.bg);
1348                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
1349                 bg = &truebg;
1350         } else {
1351                 bg = &dc.col[base.bg];
1352         }
1353
1354         /* Change basic system colors [0-7] to bright system colors [8-15] */
1355         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_BOLD && BETWEEN(base.fg, 0, 7))
1356                 fg = &dc.col[base.fg + 8];
1357
1358         if (IS_SET(MODE_REVERSE)) {
1359                 if (fg == &dc.col[defaultfg]) {
1360                         fg = &dc.col[defaultbg];
1361                 } else {
1362                         colfg.red = ~fg->color.red;
1363                         colfg.green = ~fg->color.green;
1364                         colfg.blue = ~fg->color.blue;
1365                         colfg.alpha = fg->color.alpha;
1366                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
1367                                         &revfg);
1368                         fg = &revfg;
1369                 }
1370
1371                 if (bg == &dc.col[defaultbg]) {
1372                         bg = &dc.col[defaultfg];
1373                 } else {
1374                         colbg.red = ~bg->color.red;
1375                         colbg.green = ~bg->color.green;
1376                         colbg.blue = ~bg->color.blue;
1377                         colbg.alpha = bg->color.alpha;
1378                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
1379                                         &revbg);
1380                         bg = &revbg;
1381                 }
1382         }
1383
1384         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_FAINT) {
1385                 colfg.red = fg->color.red / 2;
1386                 colfg.green = fg->color.green / 2;
1387                 colfg.blue = fg->color.blue / 2;
1388                 colfg.alpha = fg->color.alpha;
1389                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
1390                 fg = &revfg;
1391         }
1392
1393         if (base.mode & ATTR_REVERSE) {
1394                 temp = fg;
1395                 fg = bg;
1396                 bg = temp;
1397         }
1398
1399         if (base.mode & ATTR_BLINK && win.mode & MODE_BLINK)
1400                 fg = bg;
1401
1402         if (base.mode & ATTR_INVISIBLE)
1403                 fg = bg;
1404
1405         /* Intelligent cleaning up of the borders. */
1406         if (x == 0) {
1407                 xclear(0, (y == 0)? 0 : winy, borderpx,
1408                         winy + win.ch +
1409                         ((winy + win.ch >= borderpx + win.th)? win.h : 0));
1410         }
1411         if (winx + width >= borderpx + win.tw) {
1412                 xclear(winx + width, (y == 0)? 0 : winy, win.w,
1413                         ((winy + win.ch >= borderpx + win.th)? win.h : (winy + win.ch)));
1414         }
1415         if (y == 0)
1416                 xclear(winx, 0, winx + width, borderpx);
1417         if (winy + win.ch >= borderpx + win.th)
1418                 xclear(winx, winy + win.ch, winx + width, win.h);
1419
1420         /* Clean up the region we want to draw to. */
1421         XftDrawRect(xw.draw, bg, winx, winy, width, win.ch);
1422
1423         /* Set the clip region because Xft is sometimes dirty. */
1424         r.x = 0;
1425         r.y = 0;
1426         r.height = win.ch;
1427         r.width = width;
1428         XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
1429
1430         /* Render the glyphs. */
1431         XftDrawGlyphFontSpec(xw.draw, fg, specs, len);
1432
1433         /* Render underline and strikethrough. */
1434         if (base.mode & ATTR_UNDERLINE) {
1435                 XftDrawRect(xw.draw, fg, winx, winy + dc.font.ascent + 1,
1436                                 width, 1);
1437         }
1438
1439         if (base.mode & ATTR_STRUCK) {
1440                 XftDrawRect(xw.draw, fg, winx, winy + 2 * dc.font.ascent / 3,
1441                                 width, 1);
1442         }
1443
1444         /* Reset clip to none. */
1445         XftDrawSetClip(xw.draw, 0);
1446 }
1447
1448 void
1449 xdrawglyph(Glyph g, int x, int y)
1450 {
1451         int numspecs;
1452         XftGlyphFontSpec spec;
1453
1454         numspecs = xmakeglyphfontspecs(&spec, &g, 1, x, y);
1455         xdrawglyphfontspecs(&spec, g, numspecs, x, y);
1456 }
1457
1458 void
1459 xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og)
1460 {
1461         Color drawcol;
1462
1463         /* remove the old cursor */
1464         if (selected(ox, oy))
1465                 og.mode ^= ATTR_REVERSE;
1466         xdrawglyph(og, ox, oy);
1467
1468         if (IS_SET(MODE_HIDE))
1469                 return;
1470
1471         /*
1472          * Select the right color for the right mode.
1473          */
1474         g.mode &= ATTR_BOLD|ATTR_ITALIC|ATTR_UNDERLINE|ATTR_STRUCK|ATTR_WIDE;
1475
1476         if (IS_SET(MODE_REVERSE)) {
1477                 g.mode |= ATTR_REVERSE;
1478                 g.bg = defaultfg;
1479                 if (selected(cx, cy)) {
1480                         drawcol = dc.col[defaultcs];
1481                         g.fg = defaultrcs;
1482                 } else {
1483                         drawcol = dc.col[defaultrcs];
1484                         g.fg = defaultcs;
1485                 }
1486         } else {
1487                 if (selected(cx, cy)) {
1488                         g.fg = defaultfg;
1489                         g.bg = defaultrcs;
1490                 } else {
1491                         g.fg = defaultbg;
1492                         g.bg = defaultcs;
1493                 }
1494                 drawcol = dc.col[g.bg];
1495         }
1496
1497         /* draw the new one */
1498         if (IS_SET(MODE_FOCUSED)) {
1499                 switch (win.cursor) {
1500                 case 7: /* st extension: snowman (U+2603) */
1501                         g.u = 0x2603;
1502                 case 0: /* Blinking Block */
1503                 case 1: /* Blinking Block (Default) */
1504                 case 2: /* Steady Block */
1505                         xdrawglyph(g, cx, cy);
1506                         break;
1507                 case 3: /* Blinking Underline */
1508                 case 4: /* Steady Underline */
1509                         XftDrawRect(xw.draw, &drawcol,
1510                                         borderpx + cx * win.cw,
1511                                         borderpx + (cy + 1) * win.ch - \
1512                                                 cursorthickness,
1513                                         win.cw, cursorthickness);
1514                         break;
1515                 case 5: /* Blinking bar */
1516                 case 6: /* Steady bar */
1517                         XftDrawRect(xw.draw, &drawcol,
1518                                         borderpx + cx * win.cw,
1519                                         borderpx + cy * win.ch,
1520                                         cursorthickness, win.ch);
1521                         break;
1522                 }
1523         } else {
1524                 XftDrawRect(xw.draw, &drawcol,
1525                                 borderpx + cx * win.cw,
1526                                 borderpx + cy * win.ch,
1527                                 win.cw - 1, 1);
1528                 XftDrawRect(xw.draw, &drawcol,
1529                                 borderpx + cx * win.cw,
1530                                 borderpx + cy * win.ch,
1531                                 1, win.ch - 1);
1532                 XftDrawRect(xw.draw, &drawcol,
1533                                 borderpx + (cx + 1) * win.cw - 1,
1534                                 borderpx + cy * win.ch,
1535                                 1, win.ch - 1);
1536                 XftDrawRect(xw.draw, &drawcol,
1537                                 borderpx + cx * win.cw,
1538                                 borderpx + (cy + 1) * win.ch - 1,
1539                                 win.cw, 1);
1540         }
1541 }
1542
1543 void
1544 xsetenv(void)
1545 {
1546         char buf[sizeof(long) * 8 + 1];
1547
1548         snprintf(buf, sizeof(buf), "%lu", xw.win);
1549         setenv("WINDOWID", buf, 1);
1550 }
1551
1552 void
1553 xsettitle(char *p)
1554 {
1555         XTextProperty prop;
1556         DEFAULT(p, opt_title);
1557
1558         Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
1559                         &prop);
1560         XSetWMName(xw.dpy, xw.win, &prop);
1561         XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
1562         XFree(prop.value);
1563 }
1564
1565 int
1566 xstartdraw(void)
1567 {
1568         return IS_SET(MODE_VISIBLE);
1569 }
1570
1571 void
1572 xdrawline(Line line, int x1, int y1, int x2)
1573 {
1574         int i, x, ox, numspecs;
1575         Glyph base, new;
1576         XftGlyphFontSpec *specs = xw.specbuf;
1577
1578         numspecs = xmakeglyphfontspecs(specs, &line[x1], x2 - x1, x1, y1);
1579         i = ox = 0;
1580         for (x = x1; x < x2 && i < numspecs; x++) {
1581                 new = line[x];
1582                 if (new.mode == ATTR_WDUMMY)
1583                         continue;
1584                 if (selected(x, y1))
1585                         new.mode ^= ATTR_REVERSE;
1586                 if (i > 0 && ATTRCMP(base, new)) {
1587                         xdrawglyphfontspecs(specs, base, i, ox, y1);
1588                         specs += i;
1589                         numspecs -= i;
1590                         i = 0;
1591                 }
1592                 if (i == 0) {
1593                         ox = x;
1594                         base = new;
1595                 }
1596                 i++;
1597         }
1598         if (i > 0)
1599                 xdrawglyphfontspecs(specs, base, i, ox, y1);
1600 }
1601
1602 void
1603 xfinishdraw(void)
1604 {
1605         XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, win.w,
1606                         win.h, 0, 0);
1607         XSetForeground(xw.dpy, dc.gc,
1608                         dc.col[IS_SET(MODE_REVERSE)?
1609                                 defaultfg : defaultbg].pixel);
1610 }
1611
1612 void
1613 expose(XEvent *ev)
1614 {
1615         redraw();
1616 }
1617
1618 void
1619 visibility(XEvent *ev)
1620 {
1621         XVisibilityEvent *e = &ev->xvisibility;
1622
1623         MODBIT(win.mode, e->state != VisibilityFullyObscured, MODE_VISIBLE);
1624 }
1625
1626 void
1627 unmap(XEvent *ev)
1628 {
1629         win.mode &= ~MODE_VISIBLE;
1630 }
1631
1632 void
1633 xsetpointermotion(int set)
1634 {
1635         MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
1636         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
1637 }
1638
1639 void
1640 xsetmode(int set, unsigned int flags)
1641 {
1642         int mode = win.mode;
1643         MODBIT(win.mode, set, flags);
1644         if ((win.mode & MODE_REVERSE) != (mode & MODE_REVERSE))
1645                 redraw();
1646 }
1647
1648 int
1649 xsetcursor(int cursor)
1650 {
1651         DEFAULT(cursor, 1);
1652         if (!BETWEEN(cursor, 0, 6))
1653                 return 1;
1654         win.cursor = cursor;
1655         return 0;
1656 }
1657
1658 void
1659 xseturgency(int add)
1660 {
1661         XWMHints *h = XGetWMHints(xw.dpy, xw.win);
1662
1663         MODBIT(h->flags, add, XUrgencyHint);
1664         XSetWMHints(xw.dpy, xw.win, h);
1665         XFree(h);
1666 }
1667
1668 void
1669 xbell(void)
1670 {
1671         if (!(IS_SET(MODE_FOCUSED)))
1672                 xseturgency(1);
1673         if (bellvolume)
1674                 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
1675 }
1676
1677 void
1678 focus(XEvent *ev)
1679 {
1680         XFocusChangeEvent *e = &ev->xfocus;
1681
1682         if (e->mode == NotifyGrab)
1683                 return;
1684
1685         if (ev->type == FocusIn) {
1686                 XSetICFocus(xw.xic);
1687                 win.mode |= MODE_FOCUSED;
1688                 xseturgency(0);
1689                 if (IS_SET(MODE_FOCUS))
1690                         ttywrite("\033[I", 3, 0);
1691         } else {
1692                 XUnsetICFocus(xw.xic);
1693                 win.mode &= ~MODE_FOCUSED;
1694                 if (IS_SET(MODE_FOCUS))
1695                         ttywrite("\033[O", 3, 0);
1696         }
1697 }
1698
1699 int
1700 match(uint mask, uint state)
1701 {
1702         return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
1703 }
1704
1705 char*
1706 kmap(KeySym k, uint state)
1707 {
1708         Key *kp;
1709         int i;
1710
1711         /* Check for mapped keys out of X11 function keys. */
1712         for (i = 0; i < LEN(mappedkeys); i++) {
1713                 if (mappedkeys[i] == k)
1714                         break;
1715         }
1716         if (i == LEN(mappedkeys)) {
1717                 if ((k & 0xFFFF) < 0xFD00)
1718                         return NULL;
1719         }
1720
1721         for (kp = key; kp < key + LEN(key); kp++) {
1722                 if (kp->k != k)
1723                         continue;
1724
1725                 if (!match(kp->mask, state))
1726                         continue;
1727
1728                 if (IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
1729                         continue;
1730                 if (IS_SET(MODE_NUMLOCK) && kp->appkey == 2)
1731                         continue;
1732
1733                 if (IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
1734                         continue;
1735
1736                 return kp->s;
1737         }
1738
1739         return NULL;
1740 }
1741
1742 void
1743 kpress(XEvent *ev)
1744 {
1745         XKeyEvent *e = &ev->xkey;
1746         KeySym ksym;
1747         char buf[32], *customkey;
1748         int len;
1749         Rune c;
1750         Status status;
1751         Shortcut *bp;
1752
1753         if (IS_SET(MODE_KBDLOCK))
1754                 return;
1755
1756         len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
1757         /* 1. shortcuts */
1758         for (bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
1759                 if (ksym == bp->keysym && match(bp->mod, e->state)) {
1760                         bp->func(&(bp->arg));
1761                         return;
1762                 }
1763         }
1764
1765         /* 2. custom keys from config.h */
1766         if ((customkey = kmap(ksym, e->state))) {
1767                 ttywrite(customkey, strlen(customkey), 1);
1768                 return;
1769         }
1770
1771         /* 3. composed string from input method */
1772         if (len == 0)
1773                 return;
1774         if (len == 1 && e->state & Mod1Mask) {
1775                 if (IS_SET(MODE_8BIT)) {
1776                         if (*buf < 0177) {
1777                                 c = *buf | 0x80;
1778                                 len = utf8encode(c, buf);
1779                         }
1780                 } else {
1781                         buf[1] = buf[0];
1782                         buf[0] = '\033';
1783                         len = 2;
1784                 }
1785         }
1786         ttywrite(buf, len, 1);
1787 }
1788
1789
1790 void
1791 cmessage(XEvent *e)
1792 {
1793         /*
1794          * See xembed specs
1795          *  http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
1796          */
1797         if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
1798                 if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
1799                         win.mode |= MODE_FOCUSED;
1800                         xseturgency(0);
1801                 } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
1802                         win.mode &= ~MODE_FOCUSED;
1803                 }
1804         } else if (e->xclient.data.l[0] == xw.wmdeletewin) {
1805                 ttyhangup();
1806                 exit(0);
1807         }
1808 }
1809
1810 void
1811 resize(XEvent *e)
1812 {
1813         if (e->xconfigure.width == win.w && e->xconfigure.height == win.h)
1814                 return;
1815
1816         cresize(e->xconfigure.width, e->xconfigure.height);
1817 }
1818
1819 void
1820 run(void)
1821 {
1822         XEvent ev;
1823         int w = win.w, h = win.h;
1824         fd_set rfd;
1825         int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
1826         int ttyfd;
1827         struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
1828         long deltatime;
1829
1830         /* Waiting for window mapping */
1831         do {
1832                 XNextEvent(xw.dpy, &ev);
1833                 /*
1834                  * This XFilterEvent call is required because of XOpenIM. It
1835                  * does filter out the key event and some client message for
1836                  * the input method too.
1837                  */
1838                 if (XFilterEvent(&ev, None))
1839                         continue;
1840                 if (ev.type == ConfigureNotify) {
1841                         w = ev.xconfigure.width;
1842                         h = ev.xconfigure.height;
1843                 }
1844         } while (ev.type != MapNotify);
1845
1846         ttyfd = ttynew(opt_line, shell, opt_io, opt_cmd);
1847         cresize(w, h);
1848
1849         clock_gettime(CLOCK_MONOTONIC, &last);
1850         lastblink = last;
1851
1852         for (xev = actionfps;;) {
1853                 FD_ZERO(&rfd);
1854                 FD_SET(ttyfd, &rfd);
1855                 FD_SET(xfd, &rfd);
1856
1857                 if (pselect(MAX(xfd, ttyfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
1858                         if (errno == EINTR)
1859                                 continue;
1860                         die("select failed: %s\n", strerror(errno));
1861                 }
1862                 if (FD_ISSET(ttyfd, &rfd)) {
1863                         ttyread();
1864                         if (blinktimeout) {
1865                                 blinkset = tattrset(ATTR_BLINK);
1866                                 if (!blinkset)
1867                                         MODBIT(win.mode, 0, MODE_BLINK);
1868                         }
1869                 }
1870
1871                 if (FD_ISSET(xfd, &rfd))
1872                         xev = actionfps;
1873
1874                 clock_gettime(CLOCK_MONOTONIC, &now);
1875                 drawtimeout.tv_sec = 0;
1876                 drawtimeout.tv_nsec =  (1000 * 1E6)/ xfps;
1877                 tv = &drawtimeout;
1878
1879                 dodraw = 0;
1880                 if (blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
1881                         tsetdirtattr(ATTR_BLINK);
1882                         win.mode ^= MODE_BLINK;
1883                         lastblink = now;
1884                         dodraw = 1;
1885                 }
1886                 deltatime = TIMEDIFF(now, last);
1887                 if (deltatime > 1000 / (xev ? xfps : actionfps)) {
1888                         dodraw = 1;
1889                         last = now;
1890                 }
1891
1892                 if (dodraw) {
1893                         while (XPending(xw.dpy)) {
1894                                 XNextEvent(xw.dpy, &ev);
1895                                 if (XFilterEvent(&ev, None))
1896                                         continue;
1897                                 if (handler[ev.type])
1898                                         (handler[ev.type])(&ev);
1899                         }
1900
1901                         draw();
1902                         XFlush(xw.dpy);
1903
1904                         if (xev && !FD_ISSET(xfd, &rfd))
1905                                 xev--;
1906                         if (!FD_ISSET(ttyfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
1907                                 if (blinkset) {
1908                                         if (TIMEDIFF(now, lastblink) \
1909                                                         > blinktimeout) {
1910                                                 drawtimeout.tv_nsec = 1000;
1911                                         } else {
1912                                                 drawtimeout.tv_nsec = (1E6 * \
1913                                                         (blinktimeout - \
1914                                                         TIMEDIFF(now,
1915                                                                 lastblink)));
1916                                         }
1917                                         drawtimeout.tv_sec = \
1918                                             drawtimeout.tv_nsec / 1E9;
1919                                         drawtimeout.tv_nsec %= (long)1E9;
1920                                 } else {
1921                                         tv = NULL;
1922                                 }
1923                         }
1924                 }
1925         }
1926 }
1927
1928 void
1929 usage(void)
1930 {
1931         die("usage: %s [-aiv] [-c class] [-f font] [-g geometry]"
1932             " [-n name] [-o file]\n"
1933             "          [-T title] [-t title] [-w windowid]"
1934             " [[-e] command [args ...]]\n"
1935             "       %s [-aiv] [-c class] [-f font] [-g geometry]"
1936             " [-n name] [-o file]\n"
1937             "          [-T title] [-t title] [-w windowid] -l line"
1938             " [stty_args ...]\n", argv0, argv0);
1939 }
1940
1941 int
1942 main(int argc, char *argv[])
1943 {
1944         xw.l = xw.t = 0;
1945         xw.isfixed = False;
1946         win.cursor = cursorshape;
1947
1948         ARGBEGIN {
1949         case 'a':
1950                 allowaltscreen = 0;
1951                 break;
1952         case 'c':
1953                 opt_class = EARGF(usage());
1954                 break;
1955         case 'e':
1956                 if (argc > 0)
1957                         --argc, ++argv;
1958                 goto run;
1959         case 'f':
1960                 opt_font = EARGF(usage());
1961                 break;
1962         case 'g':
1963                 xw.gm = XParseGeometry(EARGF(usage()),
1964                                 &xw.l, &xw.t, &cols, &rows);
1965                 break;
1966         case 'i':
1967                 xw.isfixed = 1;
1968                 break;
1969         case 'o':
1970                 opt_io = EARGF(usage());
1971                 break;
1972         case 'l':
1973                 opt_line = EARGF(usage());
1974                 break;
1975         case 'n':
1976                 opt_name = EARGF(usage());
1977                 break;
1978         case 't':
1979         case 'T':
1980                 opt_title = EARGF(usage());
1981                 break;
1982         case 'w':
1983                 opt_embed = EARGF(usage());
1984                 break;
1985         case 'v':
1986                 die("%s " VERSION "\n", argv0);
1987                 break;
1988         default:
1989                 usage();
1990         } ARGEND;
1991
1992 run:
1993         if (argc > 0) /* eat all remaining arguments */
1994                 opt_cmd = argv;
1995
1996         if (!opt_title)
1997                 opt_title = (opt_line || !opt_cmd) ? "st" : opt_cmd[0];
1998
1999         setlocale(LC_CTYPE, "");
2000         XSetLocaleModifiers("");
2001         cols = MAX(cols, 1);
2002         rows = MAX(rows, 1);
2003         tnew(cols, rows);
2004         xinit(cols, rows);
2005         xsetenv();
2006         selinit();
2007         run();
2008
2009         return 0;
2010 }