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 /* function definitions used in config.h */
  52 static void clipcopy(const Arg *);
  53 static void clippaste(const Arg *);
  54 static void numlock(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 IS_SET(flag)            ((win.mode & (flag)) != 0)
  69 #define TRUERED(x)              (((x) & 0xff0000) >> 8)
  70 #define TRUEGREEN(x)            (((x) & 0xff00))
  71 #define TRUEBLUE(x)             (((x) & 0xff) << 8)
  72
  73 typedef XftDraw *Draw;
  74 typedef XftColor Color;
  75 typedef XftGlyphFontSpec GlyphFontSpec;
  76
  77 /* Purely graphic info */
  78 typedef struct {
  79         int tw, th; /* tty width and height */
  80         int w, h; /* window width and height */
  81         int ch; /* char height */
  82         int cw; /* char width  */
  83         int mode; /* window state/mode flags */
  84         int cursor; /* cursor style */
  85 } TermWindow;
  86
  87 typedef struct {
  88         Display *dpy;
  89         Colormap cmap;
  90         Window win;
  91         Drawable buf;
  92         GlyphFontSpec *specbuf; /* font spec buffer used for rendering */
  93         Atom xembed, wmdeletewin, netwmname, netwmpid;
  94         XIM xim;
  95         XIC xic;
  96         Draw draw;
  97         Visual *vis;
  98         XSetWindowAttributes attrs;
  99         int scr;
 100         int isfixed; /* is fixed geometry? */
 101         int l, t; /* left and top offset */
 102         int gm; /* geometry mask */
 103 } XWindow;
 104
 105 typedef struct {
 106         Atom xtarget;
 107         char *primary, *clipboard;
 108         struct timespec tclick1;
 109         struct timespec tclick2;
 110 } XSelection;
 111
 112 /* Font structure */
 113 #define Font Font_
 114 typedef struct {
 115         int height;
 116         int width;
 117         int ascent;
 118         int descent;
 119         int badslant;
 120         int badweight;
 121         short lbearing;
 122         short rbearing;
 123         XftFont *match;
 124         FcFontSet *set;
 125         FcPattern *pattern;
 126 } Font;
 127
 128 /* Drawing Context */
 129 typedef struct {
 130         Color *col;
 131         size_t collen;
 132         Font font, bfont, ifont, ibfont;
 133         GC gc;
 134 } DC;
 135
 136 static inline ushort sixd_to_16bit(int);
 137 static int xmakeglyphfontspecs(XftGlyphFontSpec *, const Glyph *, int, int, int);
 138 static void xdrawglyphfontspecs(const XftGlyphFontSpec *, Glyph, int, int, int);
 139 static void xdrawglyph(Glyph, int, int);
 140 static void xclear(int, int, int, int);
 141 static int xgeommasktogravity(int);
 142 static void ximopen(Display *);
 143 static void ximinstantiate(Display *, XPointer, XPointer);
 144 static void ximdestroy(XIM, XPointer, XPointer);
 145 static void xinit(int, int);
 146 static void cresize(int, int);
 147 static void xresize(int, int);
 148 static void xhints(void);
 149 static int xloadcolor(int, const char *, Color *);
 150 static int xloadfont(Font *, FcPattern *);
 151 static void xloadfonts(char *, double);
 152 static void xunloadfont(Font *);
 153 static void xunloadfonts(void);
 154 static void xsetenv(void);
 155 static void xseturgency(int);
 156 static int evcol(XEvent *);
 157 static int evrow(XEvent *);
 158
 159 static void expose(XEvent *);
 160 static void visibility(XEvent *);
 161 static void unmap(XEvent *);
 162 static void kpress(XEvent *);
 163 static void cmessage(XEvent *);
 164 static void resize(XEvent *);
 165 static void focus(XEvent *);
 166 static void brelease(XEvent *);
 167 static void bpress(XEvent *);
 168 static void bmotion(XEvent *);
 169 static void propnotify(XEvent *);
 170 static void selnotify(XEvent *);
 171 static void selclear_(XEvent *);
 172 static void selrequest(XEvent *);
 173 static void setsel(char *, Time);
 174 static void mousesel(XEvent *, int);
 175 static void mousereport(XEvent *);
 176 static char *kmap(KeySym, uint);
 177 static int match(uint, uint);
 178
 179 static void run(void);
 180 static void usage(void);
 181
 182 static void (*handler[LASTEvent])(XEvent *) = {
 183         [KeyPress] = kpress,
 184         [ClientMessage] = cmessage,
 185         [ConfigureNotify] = resize,
 186         [VisibilityNotify] = visibility,
 187         [UnmapNotify] = unmap,
 188         [Expose] = expose,
 189         [FocusIn] = focus,
 190         [FocusOut] = focus,
 191         [MotionNotify] = bmotion,
 192         [ButtonPress] = bpress,
 193         [ButtonRelease] = brelease,
 194 /*
 195  * Uncomment if you want the selection to disappear when you select something
 196  * different in another window.
 197  */
 198 /*      [SelectionClear] = selclear_, */
 199         [SelectionNotify] = selnotify,
 200 /*
 201  * PropertyNotify is only turned on when there is some INCR transfer happening
 202  * for the selection retrieval.
 203  */
 204         [PropertyNotify] = propnotify,
 205         [SelectionRequest] = selrequest,
 206 };
 207
 208 /* Globals */
 209 static DC dc;
 210 static XWindow xw;
 211 static XSelection xsel;
 212 static TermWindow win;
 213
 214 /* Font Ring Cache */
 215 enum {
 216         FRC_NORMAL,
 217         FRC_ITALIC,
 218         FRC_BOLD,
 219         FRC_ITALICBOLD
 220 };
 221
 222 typedef struct {
 223         XftFont *font;
 224         int flags;
 225         Rune unicodep;
 226 } Fontcache;
 227
 228 /* Fontcache is an array now. A new font will be appended to the array. */
 229 static Fontcache *frc = NULL;
 230 static int frclen = 0;
 231 static int frccap = 0;
 232 static char *usedfont = NULL;
 233 static double usedfontsize = 0;
 234 static double defaultfontsize = 0;
 235
 236 static char *opt_class = NULL;
 237 static char **opt_cmd  = NULL;
 238 static char *opt_embed = NULL;
 239 static char *opt_font  = NULL;
 240 static char *opt_io    = NULL;
 241 static char *opt_line  = NULL;
 242 static char *opt_name  = NULL;
 243 static char *opt_title = NULL;
 244
 245 static int oldbutton = 3; /* button event on startup: 3 = release */
 246
 247 void
 248 clipcopy(const Arg *dummy)
 249 {
 250         Atom clipboard;
 251
 252         free(xsel.clipboard);
 253         xsel.clipboard = NULL;
 254
 255         if (xsel.primary != NULL) {
 256                 xsel.clipboard = xstrdup(xsel.primary);
 257                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 258                 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
 259         }
 260 }
 261
 262 void
 263 clippaste(const Arg *dummy)
 264 {
 265         Atom clipboard;
 266
 267         clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 268         XConvertSelection(xw.dpy, clipboard, xsel.xtarget, clipboard,
 269                         xw.win, CurrentTime);
 270 }
 271
 272 void
 273 selpaste(const Arg *dummy)
 274 {
 275         XConvertSelection(xw.dpy, XA_PRIMARY, xsel.xtarget, XA_PRIMARY,
 276                         xw.win, CurrentTime);
 277 }
 278
 279 void
 280 numlock(const Arg *dummy)
 281 {
 282         win.mode ^= MODE_NUMLOCK;
 283 }
 284
 285 void
 286 zoom(const Arg *arg)
 287 {
 288         Arg larg;
 289
 290         larg.f = usedfontsize + arg->f;
 291         zoomabs(&larg);
 292 }
 293
 294 void
 295 zoomabs(const Arg *arg)
 296 {
 297         xunloadfonts();
 298         xloadfonts(usedfont, arg->f);
 299         cresize(0, 0);
 300         redraw();
 301         xhints();
 302 }
 303
 304 void
 305 zoomreset(const Arg *arg)
 306 {
 307         Arg larg;
 308
 309         if (defaultfontsize > 0) {
 310                 larg.f = defaultfontsize;
 311                 zoomabs(&larg);
 312         }
 313 }
 314
 315 int
 316 evcol(XEvent *e)
 317 {
 318         int x = e->xbutton.x - borderpx;
 319         LIMIT(x, 0, win.tw - 1);
 320         return x / win.cw;
 321 }
 322
 323 int
 324 evrow(XEvent *e)
 325 {
 326         int y = e->xbutton.y - borderpx;
 327         LIMIT(y, 0, win.th - 1);
 328         return y / win.ch;
 329 }
 330
 331 void
 332 mousesel(XEvent *e, int done)
 333 {
 334         int type, seltype = SEL_REGULAR;
 335         uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
 336
 337         for (type = 1; type < LEN(selmasks); ++type) {
 338                 if (match(selmasks[type], state)) {
 339                         seltype = type;
 340                         break;
 341                 }
 342         }
 343         selextend(evcol(e), evrow(e), seltype, done);
 344         if (done)
 345                 setsel(getsel(), e->xbutton.time);
 346 }
 347
 348 void
 349 mousereport(XEvent *e)
 350 {
 351         int len, x = evcol(e), y = evrow(e),
 352             button = e->xbutton.button, state = e->xbutton.state;
 353         char buf[40];
 354         static int ox, oy;
 355
 356         /* from urxvt */
 357         if (e->xbutton.type == MotionNotify) {
 358                 if (x == ox && y == oy)
 359                         return;
 360                 if (!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
 361                         return;
 362                 /* MOUSE_MOTION: no reporting if no button is pressed */
 363                 if (IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
 364                         return;
 365
 366                 button = oldbutton + 32;
 367                 ox = x;
 368                 oy = y;
 369         } else {
 370                 if (!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
 371                         button = 3;
 372                 } else {
 373                         button -= Button1;
 374                         if (button >= 3)
 375                                 button += 64 - 3;
 376                 }
 377                 if (e->xbutton.type == ButtonPress) {
 378                         oldbutton = button;
 379                         ox = x;
 380                         oy = y;
 381                 } else if (e->xbutton.type == ButtonRelease) {
 382                         oldbutton = 3;
 383                         /* MODE_MOUSEX10: no button release reporting */
 384                         if (IS_SET(MODE_MOUSEX10))
 385                                 return;
 386                         if (button == 64 || button == 65)
 387                                 return;
 388                 }
 389         }
 390
 391         if (!IS_SET(MODE_MOUSEX10)) {
 392                 button += ((state & ShiftMask  ) ? 4  : 0)
 393                         + ((state & Mod4Mask   ) ? 8  : 0)
 394                         + ((state & ControlMask) ? 16 : 0);
 395         }
 396
 397         if (IS_SET(MODE_MOUSESGR)) {
 398                 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
 399                                 button, x+1, y+1,
 400                                 e->xbutton.type == ButtonRelease ? 'm' : 'M');
 401         } else if (x < 223 && y < 223) {
 402                 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
 403                                 32+button, 32+x+1, 32+y+1);
 404         } else {
 405                 return;
 406         }
 407
 408         ttywrite(buf, len, 0);
 409 }
 410
 411 void
 412 bpress(XEvent *e)
 413 {
 414         struct timespec now;
 415         MouseShortcut *ms;
 416         int snap;
 417
 418         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 419                 mousereport(e);
 420                 return;
 421         }
 422
 423         for (ms = mshortcuts; ms < mshortcuts + LEN(mshortcuts); ms++) {
 424                 if (e->xbutton.button == ms->b
 425                                 && match(ms->mask, e->xbutton.state)) {
 426                         ttywrite(ms->s, strlen(ms->s), 1);
 427                         return;
 428                 }
 429         }
 430
 431         if (e->xbutton.button == Button1) {
 432                 /*
 433                  * If the user clicks below predefined timeouts specific
 434                  * snapping behaviour is exposed.
 435                  */
 436                 clock_gettime(CLOCK_MONOTONIC, &now);
 437                 if (TIMEDIFF(now, xsel.tclick2) <= tripleclicktimeout) {
 438                         snap = SNAP_LINE;
 439                 } else if (TIMEDIFF(now, xsel.tclick1) <= doubleclicktimeout) {
 440                         snap = SNAP_WORD;
 441                 } else {
 442                         snap = 0;
 443                 }
 444                 xsel.tclick2 = xsel.tclick1;
 445                 xsel.tclick1 = now;
 446
 447                 selstart(evcol(e), evrow(e), snap);
 448         }
 449 }
 450
 451 void
 452 propnotify(XEvent *e)
 453 {
 454         XPropertyEvent *xpev;
 455         Atom clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 456
 457         xpev = &e->xproperty;
 458         if (xpev->state == PropertyNewValue &&
 459                         (xpev->atom == XA_PRIMARY ||
 460                          xpev->atom == clipboard)) {
 461                 selnotify(e);
 462         }
 463 }
 464
 465 void
 466 selnotify(XEvent *e)
 467 {
 468         ulong nitems, ofs, rem;
 469         int format;
 470         uchar *data, *last, *repl;
 471         Atom type, incratom, property = None;
 472
 473         incratom = XInternAtom(xw.dpy, "INCR", 0);
 474
 475         ofs = 0;
 476         if (e->type == SelectionNotify)
 477                 property = e->xselection.property;
 478         else if (e->type == PropertyNotify)
 479                 property = e->xproperty.atom;
 480
 481         if (property == None)
 482                 return;
 483
 484         do {
 485                 if (XGetWindowProperty(xw.dpy, xw.win, property, ofs,
 486                                         BUFSIZ/4, False, AnyPropertyType,
 487                                         &type, &format, &nitems, &rem,
 488                                         &data)) {
 489                         fprintf(stderr, "Clipboard allocation failed\n");
 490                         return;
 491                 }
 492
 493                 if (e->type == PropertyNotify && nitems == 0 && rem == 0) {
 494                         /*
 495                          * If there is some PropertyNotify with no data, then
 496                          * this is the signal of the selection owner that all
 497                          * data has been transferred. We won't need to receive
 498                          * PropertyNotify events anymore.
 499                          */
 500                         MODBIT(xw.attrs.event_mask, 0, PropertyChangeMask);
 501                         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
 502                                         &xw.attrs);
 503                 }
 504
 505                 if (type == incratom) {
 506                         /*
 507                          * Activate the PropertyNotify events so we receive
 508                          * when the selection owner does send us the next
 509                          * chunk of data.
 510                          */
 511                         MODBIT(xw.attrs.event_mask, 1, PropertyChangeMask);
 512                         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
 513                                         &xw.attrs);
 514
 515                         /*
 516                          * Deleting the property is the transfer start signal.
 517                          */
 518                         XDeleteProperty(xw.dpy, xw.win, (int)property);
 519                         continue;
 520                 }
 521
 522                 /*
 523                  * As seen in getsel:
 524                  * Line endings are inconsistent in the terminal and GUI world
 525                  * copy and pasting. When receiving some selection data,
 526                  * replace all '\n' with '\r'.
 527                  * FIXME: Fix the computer world.
 528                  */
 529                 repl = data;
 530                 last = data + nitems * format / 8;
 531                 while ((repl = memchr(repl, '\n', last - repl))) {
 532                         *repl++ = '\r';
 533                 }
 534
 535                 if (IS_SET(MODE_BRCKTPASTE) && ofs == 0)
 536                         ttywrite("\033[200~", 6, 0);
 537                 ttywrite((char *)data, nitems * format / 8, 1);
 538                 if (IS_SET(MODE_BRCKTPASTE) && rem == 0)
 539                         ttywrite("\033[201~", 6, 0);
 540                 XFree(data);
 541                 /* number of 32-bit chunks returned */
 542                 ofs += nitems * format / 32;
 543         } while (rem > 0);
 544
 545         /*
 546          * Deleting the property again tells the selection owner to send the
 547          * next data chunk in the property.
 548          */
 549         XDeleteProperty(xw.dpy, xw.win, (int)property);
 550 }
 551
 552 void
 553 xclipcopy(void)
 554 {
 555         clipcopy(NULL);
 556 }
 557
 558 void
 559 selclear_(XEvent *e)
 560 {
 561         selclear();
 562 }
 563
 564 void
 565 selrequest(XEvent *e)
 566 {
 567         XSelectionRequestEvent *xsre;
 568         XSelectionEvent xev;
 569         Atom xa_targets, string, clipboard;
 570         char *seltext;
 571
 572         xsre = (XSelectionRequestEvent *) e;
 573         xev.type = SelectionNotify;
 574         xev.requestor = xsre->requestor;
 575         xev.selection = xsre->selection;
 576         xev.target = xsre->target;
 577         xev.time = xsre->time;
 578         if (xsre->property == None)
 579                 xsre->property = xsre->target;
 580
 581         /* reject */
 582         xev.property = None;
 583
 584         xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
 585         if (xsre->target == xa_targets) {
 586                 /* respond with the supported type */
 587                 string = xsel.xtarget;
 588                 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
 589                                 XA_ATOM, 32, PropModeReplace,
 590                                 (uchar *) &string, 1);
 591                 xev.property = xsre->property;
 592         } else if (xsre->target == xsel.xtarget || xsre->target == XA_STRING) {
 593                 /*
 594                  * xith XA_STRING non ascii characters may be incorrect in the
 595                  * requestor. It is not our problem, use utf8.
 596                  */
 597                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 598                 if (xsre->selection == XA_PRIMARY) {
 599                         seltext = xsel.primary;
 600                 } else if (xsre->selection == clipboard) {
 601                         seltext = xsel.clipboard;
 602                 } else {
 603                         fprintf(stderr,
 604                                 "Unhandled clipboard selection 0x%lx\n",
 605                                 xsre->selection);
 606                         return;
 607                 }
 608                 if (seltext != NULL) {
 609                         XChangeProperty(xsre->display, xsre->requestor,
 610                                         xsre->property, xsre->target,
 611                                         8, PropModeReplace,
 612                                         (uchar *)seltext, strlen(seltext));
 613                         xev.property = xsre->property;
 614                 }
 615         }
 616
 617         /* all done, send a notification to the listener */
 618         if (!XSendEvent(xsre->display, xsre->requestor, 1, 0, (XEvent *) &xev))
 619                 fprintf(stderr, "Error sending SelectionNotify event\n");
 620 }
 621
 622 void
 623 setsel(char *str, Time t)
 624 {
 625         if (!str)
 626                 return;
 627
 628         free(xsel.primary);
 629         xsel.primary = str;
 630
 631         XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
 632         if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
 633                 selclear();
 634 }
 635
 636 void
 637 xsetsel(char *str)
 638 {
 639         setsel(str, CurrentTime);
 640 }
 641
 642 void
 643 brelease(XEvent *e)
 644 {
 645         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 646                 mousereport(e);
 647                 return;
 648         }
 649
 650         if (e->xbutton.button == Button2)
 651                 selpaste(NULL);
 652         else if (e->xbutton.button == Button1)
 653                 mousesel(e, 1);
 654 }
 655
 656 void
 657 bmotion(XEvent *e)
 658 {
 659         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 660                 mousereport(e);
 661                 return;
 662         }
 663
 664         mousesel(e, 0);
 665 }
 666
 667 void
 668 cresize(int width, int height)
 669 {
 670         int col, row;
 671
 672         if (width != 0)
 673                 win.w = width;
 674         if (height != 0)
 675                 win.h = height;
 676
 677         col = (win.w - 2 * borderpx) / win.cw;
 678         row = (win.h - 2 * borderpx) / win.ch;
 679         col = MAX(1, col);
 680         row = MAX(1, row);
 681
 682         tresize(col, row);
 683         xresize(col, row);
 684         ttyresize(win.tw, win.th);
 685 }
 686
 687 void
 688 xresize(int col, int row)
 689 {
 690         win.tw = col * win.cw;
 691         win.th = row * win.ch;
 692
 693         XFreePixmap(xw.dpy, xw.buf);
 694         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
 695                         DefaultDepth(xw.dpy, xw.scr));
 696         XftDrawChange(xw.draw, xw.buf);
 697         xclear(0, 0, win.w, win.h);
 698
 699         /* resize to new width */
 700         xw.specbuf = xrealloc(xw.specbuf, col * sizeof(GlyphFontSpec));
 701 }
 702
 703 ushort
 704 sixd_to_16bit(int x)
 705 {
 706         return x == 0 ? 0 : 0x3737 + 0x2828 * x;
 707 }
 708
 709 int
 710 xloadcolor(int i, const char *name, Color *ncolor)
 711 {
 712         XRenderColor color = { .alpha = 0xffff };
 713
 714         if (!name) {
 715                 if (BETWEEN(i, 16, 255)) { /* 256 color */
 716                         if (i < 6*6*6+16) { /* same colors as xterm */
 717                                 color.red   = sixd_to_16bit( ((i-16)/36)%6 );
 718                                 color.green = sixd_to_16bit( ((i-16)/6) %6 );
 719                                 color.blue  = sixd_to_16bit( ((i-16)/1) %6 );
 720                         } else { /* greyscale */
 721                                 color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
 722                                 color.green = color.blue = color.red;
 723                         }
 724                         return XftColorAllocValue(xw.dpy, xw.vis,
 725                                                   xw.cmap, &color, ncolor);
 726                 } else
 727                         name = colorname[i];
 728         }
 729
 730         return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
 731 }
 732
 733 void
 734 xloadcols(void)
 735 {
 736         int i;
 737         static int loaded;
 738         Color *cp;
 739
 740         if (loaded) {
 741                 for (cp = dc.col; cp < &dc.col[dc.collen]; ++cp)
 742                         XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
 743         } else {
 744                 dc.collen = MAX(LEN(colorname), 256);
 745                 dc.col = xmalloc(dc.collen * sizeof(Color));
 746         }
 747
 748         for (i = 0; i < dc.collen; i++)
 749                 if (!xloadcolor(i, NULL, &dc.col[i])) {
 750                         if (colorname[i])
 751                                 die("could not allocate color '%s'\n", colorname[i]);
 752                         else
 753                                 die("could not allocate color %d\n", i);
 754                 }
 755         loaded = 1;
 756 }
 757
 758 int
 759 xsetcolorname(int x, const char *name)
 760 {
 761         Color ncolor;
 762
 763         if (!BETWEEN(x, 0, dc.collen))
 764                 return 1;
 765
 766         if (!xloadcolor(x, name, &ncolor))
 767                 return 1;
 768
 769         XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
 770         dc.col[x] = ncolor;
 771
 772         return 0;
 773 }
 774
 775 /*
 776  * Absolute coordinates.
 777  */
 778 void
 779 xclear(int x1, int y1, int x2, int y2)
 780 {
 781         XftDrawRect(xw.draw,
 782                         &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
 783                         x1, y1, x2-x1, y2-y1);
 784 }
 785
 786 void
 787 xhints(void)
 788 {
 789         XClassHint class = {opt_name ? opt_name : termname,
 790                             opt_class ? opt_class : termname};
 791         XWMHints wm = {.flags = InputHint, .input = 1};
 792         XSizeHints *sizeh;
 793
 794         sizeh = XAllocSizeHints();
 795
 796         sizeh->flags = PSize | PResizeInc | PBaseSize | PMinSize;
 797         sizeh->height = win.h;
 798         sizeh->width = win.w;
 799         sizeh->height_inc = win.ch;
 800         sizeh->width_inc = win.cw;
 801         sizeh->base_height = 2 * borderpx;
 802         sizeh->base_width = 2 * borderpx;
 803         sizeh->min_height = win.ch + 2 * borderpx;
 804         sizeh->min_width = win.cw + 2 * borderpx;
 805         if (xw.isfixed) {
 806                 sizeh->flags |= PMaxSize;
 807                 sizeh->min_width = sizeh->max_width = win.w;
 808                 sizeh->min_height = sizeh->max_height = win.h;
 809         }
 810         if (xw.gm & (XValue|YValue)) {
 811                 sizeh->flags |= USPosition | PWinGravity;
 812                 sizeh->x = xw.l;
 813                 sizeh->y = xw.t;
 814                 sizeh->win_gravity = xgeommasktogravity(xw.gm);
 815         }
 816
 817         XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
 818                         &class);
 819         XFree(sizeh);
 820 }
 821
 822 int
 823 xgeommasktogravity(int mask)
 824 {
 825         switch (mask & (XNegative|YNegative)) {
 826         case 0:
 827                 return NorthWestGravity;
 828         case XNegative:
 829                 return NorthEastGravity;
 830         case YNegative:
 831                 return SouthWestGravity;
 832         }
 833
 834         return SouthEastGravity;
 835 }
 836
 837 int
 838 xloadfont(Font *f, FcPattern *pattern)
 839 {
 840         FcPattern *configured;
 841         FcPattern *match;
 842         FcResult result;
 843         XGlyphInfo extents;
 844         int wantattr, haveattr;
 845
 846         /*
 847          * Manually configure instead of calling XftMatchFont
 848          * so that we can use the configured pattern for
 849          * "missing glyph" lookups.
 850          */
 851         configured = FcPatternDuplicate(pattern);
 852         if (!configured)
 853                 return 1;
 854
 855         FcConfigSubstitute(NULL, configured, FcMatchPattern);
 856         XftDefaultSubstitute(xw.dpy, xw.scr, configured);
 857
 858         match = FcFontMatch(NULL, configured, &result);
 859         if (!match) {
 860                 FcPatternDestroy(configured);
 861                 return 1;
 862         }
 863
 864         if (!(f->match = XftFontOpenPattern(xw.dpy, match))) {
 865                 FcPatternDestroy(configured);
 866                 FcPatternDestroy(match);
 867                 return 1;
 868         }
 869
 870         if ((XftPatternGetInteger(pattern, "slant", 0, &wantattr) ==
 871             XftResultMatch)) {
 872                 /*
 873                  * Check if xft was unable to find a font with the appropriate
 874                  * slant but gave us one anyway. Try to mitigate.
 875                  */
 876                 if ((XftPatternGetInteger(f->match->pattern, "slant", 0,
 877                     &haveattr) != XftResultMatch) || haveattr < wantattr) {
 878                         f->badslant = 1;
 879                         fputs("font slant does not match\n", stderr);
 880                 }
 881         }
 882
 883         if ((XftPatternGetInteger(pattern, "weight", 0, &wantattr) ==
 884             XftResultMatch)) {
 885                 if ((XftPatternGetInteger(f->match->pattern, "weight", 0,
 886                     &haveattr) != XftResultMatch) || haveattr != wantattr) {
 887                         f->badweight = 1;
 888                         fputs("font weight does not match\n", stderr);
 889                 }
 890         }
 891
 892         XftTextExtentsUtf8(xw.dpy, f->match,
 893                 (const FcChar8 *) ascii_printable,
 894                 strlen(ascii_printable), &extents);
 895
 896         f->set = NULL;
 897         f->pattern = configured;
 898
 899         f->ascent = f->match->ascent;
 900         f->descent = f->match->descent;
 901         f->lbearing = 0;
 902         f->rbearing = f->match->max_advance_width;
 903
 904         f->height = f->ascent + f->descent;
 905         f->width = DIVCEIL(extents.xOff, strlen(ascii_printable));
 906
 907         return 0;
 908 }
 909
 910 void
 911 xloadfonts(char *fontstr, double fontsize)
 912 {
 913         FcPattern *pattern;
 914         double fontval;
 915
 916         if (fontstr[0] == '-')
 917                 pattern = XftXlfdParse(fontstr, False, False);
 918         else
 919                 pattern = FcNameParse((FcChar8 *)fontstr);
 920
 921         if (!pattern)
 922                 die("can't open font %s\n", fontstr);
 923
 924         if (fontsize > 1) {
 925                 FcPatternDel(pattern, FC_PIXEL_SIZE);
 926                 FcPatternDel(pattern, FC_SIZE);
 927                 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
 928                 usedfontsize = fontsize;
 929         } else {
 930                 if (FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval) ==
 931                                 FcResultMatch) {
 932                         usedfontsize = fontval;
 933                 } else if (FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval) ==
 934                                 FcResultMatch) {
 935                         usedfontsize = -1;
 936                 } else {
 937                         /*
 938                          * Default font size is 12, if none given. This is to
 939                          * have a known usedfontsize value.
 940                          */
 941                         FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
 942                         usedfontsize = 12;
 943                 }
 944                 defaultfontsize = usedfontsize;
 945         }
 946
 947         if (xloadfont(&dc.font, pattern))
 948                 die("can't open font %s\n", fontstr);
 949
 950         if (usedfontsize < 0) {
 951                 FcPatternGetDouble(dc.font.match->pattern,
 952                                    FC_PIXEL_SIZE, 0, &fontval);
 953                 usedfontsize = fontval;
 954                 if (fontsize == 0)
 955                         defaultfontsize = fontval;
 956         }
 957
 958         /* Setting character width and height. */
 959         win.cw = ceilf(dc.font.width * cwscale);
 960         win.ch = ceilf(dc.font.height * chscale);
 961
 962         FcPatternDel(pattern, FC_SLANT);
 963         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
 964         if (xloadfont(&dc.ifont, pattern))
 965                 die("can't open font %s\n", fontstr);
 966
 967         FcPatternDel(pattern, FC_WEIGHT);
 968         FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
 969         if (xloadfont(&dc.ibfont, pattern))
 970                 die("can't open font %s\n", fontstr);
 971
 972         FcPatternDel(pattern, FC_SLANT);
 973         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
 974         if (xloadfont(&dc.bfont, pattern))
 975                 die("can't open font %s\n", fontstr);
 976
 977         FcPatternDestroy(pattern);
 978 }
 979
 980 void
 981 xunloadfont(Font *f)
 982 {
 983         XftFontClose(xw.dpy, f->match);
 984         FcPatternDestroy(f->pattern);
 985         if (f->set)
 986                 FcFontSetDestroy(f->set);
 987 }
 988
 989 void
 990 xunloadfonts(void)
 991 {
 992         /* Free the loaded fonts in the font cache.  */
 993         while (frclen > 0)
 994                 XftFontClose(xw.dpy, frc[--frclen].font);
 995
 996         xunloadfont(&dc.font);
 997         xunloadfont(&dc.bfont);
 998         xunloadfont(&dc.ifont);
 999         xunloadfont(&dc.ibfont);
1000 }
1001
1002 void
1003 ximopen(Display *dpy)
1004 {
1005         XIMCallback destroy = { .client_data = NULL, .callback = ximdestroy };
1006
1007         if ((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
1008                 XSetLocaleModifiers("@im=local");
1009                 if ((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
1010                         XSetLocaleModifiers("@im=");
1011                         if ((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL)
1012                                 die("XOpenIM failed. Could not open input device.\n");
1013                 }
1014         }
1015         if (XSetIMValues(xw.xim, XNDestroyCallback, &destroy, NULL) != NULL)
1016                 die("XSetIMValues failed. Could not set input method value.\n");
1017         xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing | XIMStatusNothing,
1018                                 XNClientWindow, xw.win, XNFocusWindow, xw.win, NULL);
1019         if (xw.xic == NULL)
1020                 die("XCreateIC failed. Could not obtain input method.\n");
1021 }
1022
1023 void
1024 ximinstantiate(Display *dpy, XPointer client, XPointer call)
1025 {
1026         ximopen(dpy);
1027         XUnregisterIMInstantiateCallback(xw.dpy, NULL, NULL, NULL,
1028                                         ximinstantiate, NULL);
1029 }
1030
1031 void
1032 ximdestroy(XIM xim, XPointer client, XPointer call)
1033 {
1034         xw.xim = NULL;
1035         XRegisterIMInstantiateCallback(xw.dpy, NULL, NULL, NULL,
1036                                         ximinstantiate, NULL);
1037 }
1038
1039 void
1040 xinit(int cols, int rows)
1041 {
1042         XGCValues gcvalues;
1043         Cursor cursor;
1044         Window parent;
1045         pid_t thispid = getpid();
1046         XColor xmousefg, xmousebg;
1047
1048         if (!(xw.dpy = XOpenDisplay(NULL)))
1049                 die("can't open display\n");
1050         xw.scr = XDefaultScreen(xw.dpy);
1051         xw.vis = XDefaultVisual(xw.dpy, xw.scr);
1052
1053         /* font */
1054         if (!FcInit())
1055                 die("could not init fontconfig.\n");
1056
1057         usedfont = (opt_font == NULL)? font : opt_font;
1058         xloadfonts(usedfont, 0);
1059
1060         /* colors */
1061         xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1062         xloadcols();
1063
1064         /* adjust fixed window geometry */
1065         win.w = 2 * borderpx + cols * win.cw;
1066         win.h = 2 * borderpx + rows * win.ch;
1067         if (xw.gm & XNegative)
1068                 xw.l += DisplayWidth(xw.dpy, xw.scr) - win.w - 2;
1069         if (xw.gm & YNegative)
1070                 xw.t += DisplayHeight(xw.dpy, xw.scr) - win.h - 2;
1071
1072         /* Events */
1073         xw.attrs.background_pixel = dc.col[defaultbg].pixel;
1074         xw.attrs.border_pixel = dc.col[defaultbg].pixel;
1075         xw.attrs.bit_gravity = NorthWestGravity;
1076         xw.attrs.event_mask = FocusChangeMask | KeyPressMask | KeyReleaseMask
1077                 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1078                 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
1079         xw.attrs.colormap = xw.cmap;
1080
1081         if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
1082                 parent = XRootWindow(xw.dpy, xw.scr);
1083         xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
1084                         win.w, win.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
1085                         xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
1086                         | CWEventMask | CWColormap, &xw.attrs);
1087
1088         memset(&gcvalues, 0, sizeof(gcvalues));
1089         gcvalues.graphics_exposures = False;
1090         dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
1091                         &gcvalues);
1092         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
1093                         DefaultDepth(xw.dpy, xw.scr));
1094         XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
1095         XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, win.w, win.h);
1096
1097         /* font spec buffer */
1098         xw.specbuf = xmalloc(cols * sizeof(GlyphFontSpec));
1099
1100         /* Xft rendering context */
1101         xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
1102
1103         /* input methods */
1104         ximopen(xw.dpy);
1105
1106         /* white cursor, black outline */
1107         cursor = XCreateFontCursor(xw.dpy, mouseshape);
1108         XDefineCursor(xw.dpy, xw.win, cursor);
1109
1110         if (XParseColor(xw.dpy, xw.cmap, colorname[mousefg], &xmousefg) == 0) {
1111                 xmousefg.red   = 0xffff;
1112                 xmousefg.green = 0xffff;
1113                 xmousefg.blue  = 0xffff;
1114         }
1115
1116         if (XParseColor(xw.dpy, xw.cmap, colorname[mousebg], &xmousebg) == 0) {
1117                 xmousebg.red   = 0x0000;
1118                 xmousebg.green = 0x0000;
1119                 xmousebg.blue  = 0x0000;
1120         }
1121
1122         XRecolorCursor(xw.dpy, cursor, &xmousefg, &xmousebg);
1123
1124         xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
1125         xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
1126         xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
1127         XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
1128
1129         xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
1130         XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
1131                         PropModeReplace, (uchar *)&thispid, 1);
1132
1133         win.mode = MODE_NUMLOCK;
1134         resettitle();
1135         XMapWindow(xw.dpy, xw.win);
1136         xhints();
1137         XSync(xw.dpy, False);
1138
1139         clock_gettime(CLOCK_MONOTONIC, &xsel.tclick1);
1140         clock_gettime(CLOCK_MONOTONIC, &xsel.tclick2);
1141         xsel.primary = NULL;
1142         xsel.clipboard = NULL;
1143         xsel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
1144         if (xsel.xtarget == None)
1145                 xsel.xtarget = XA_STRING;
1146 }
1147
1148 int
1149 xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x, int y)
1150 {
1151         float winx = borderpx + x * win.cw, winy = borderpx + y * win.ch, xp, yp;
1152         ushort mode, prevmode = USHRT_MAX;
1153         Font *font = &dc.font;
1154         int frcflags = FRC_NORMAL;
1155         float runewidth = win.cw;
1156         Rune rune;
1157         FT_UInt glyphidx;
1158         FcResult fcres;
1159         FcPattern *fcpattern, *fontpattern;
1160         FcFontSet *fcsets[] = { NULL };
1161         FcCharSet *fccharset;
1162         int i, f, numspecs = 0;
1163
1164         for (i = 0, xp = winx, yp = winy + font->ascent; i < len; ++i) {
1165                 /* Fetch rune and mode for current glyph. */
1166                 rune = glyphs[i].u;
1167                 mode = glyphs[i].mode;
1168
1169                 /* Skip dummy wide-character spacing. */
1170                 if (mode == ATTR_WDUMMY)
1171                         continue;
1172
1173                 /* Determine font for glyph if different from previous glyph. */
1174                 if (prevmode != mode) {
1175                         prevmode = mode;
1176                         font = &dc.font;
1177                         frcflags = FRC_NORMAL;
1178                         runewidth = win.cw * ((mode & ATTR_WIDE) ? 2.0f : 1.0f);
1179                         if ((mode & ATTR_ITALIC) && (mode & ATTR_BOLD)) {
1180                                 font = &dc.ibfont;
1181                                 frcflags = FRC_ITALICBOLD;
1182                         } else if (mode & ATTR_ITALIC) {
1183                                 font = &dc.ifont;
1184                                 frcflags = FRC_ITALIC;
1185                         } else if (mode & ATTR_BOLD) {
1186                                 font = &dc.bfont;
1187                                 frcflags = FRC_BOLD;
1188                         }
1189                         yp = winy + font->ascent;
1190                 }
1191
1192                 /* Lookup character index with default font. */
1193                 glyphidx = XftCharIndex(xw.dpy, font->match, rune);
1194                 if (glyphidx) {
1195                         specs[numspecs].font = font->match;
1196                         specs[numspecs].glyph = glyphidx;
1197                         specs[numspecs].x = (short)xp;
1198                         specs[numspecs].y = (short)yp;
1199                         xp += runewidth;
1200                         numspecs++;
1201                         continue;
1202                 }
1203
1204                 /* Fallback on font cache, search the font cache for match. */
1205                 for (f = 0; f < frclen; f++) {
1206                         glyphidx = XftCharIndex(xw.dpy, frc[f].font, rune);
1207                         /* Everything correct. */
1208                         if (glyphidx && frc[f].flags == frcflags)
1209                                 break;
1210                         /* We got a default font for a not found glyph. */
1211                         if (!glyphidx && frc[f].flags == frcflags
1212                                         && frc[f].unicodep == rune) {
1213                                 break;
1214                         }
1215                 }
1216
1217                 /* Nothing was found. Use fontconfig to find matching font. */
1218                 if (f >= frclen) {
1219                         if (!font->set)
1220                                 font->set = FcFontSort(0, font->pattern,
1221                                                        1, 0, &fcres);
1222                         fcsets[0] = font->set;
1223
1224                         /*
1225                          * Nothing was found in the cache. Now use
1226                          * some dozen of Fontconfig calls to get the
1227                          * font for one single character.
1228                          *
1229                          * Xft and fontconfig are design failures.
1230                          */
1231                         fcpattern = FcPatternDuplicate(font->pattern);
1232                         fccharset = FcCharSetCreate();
1233
1234                         FcCharSetAddChar(fccharset, rune);
1235                         FcPatternAddCharSet(fcpattern, FC_CHARSET,
1236                                         fccharset);
1237                         FcPatternAddBool(fcpattern, FC_SCALABLE, 1);
1238
1239                         FcConfigSubstitute(0, fcpattern,
1240                                         FcMatchPattern);
1241                         FcDefaultSubstitute(fcpattern);
1242
1243                         fontpattern = FcFontSetMatch(0, fcsets, 1,
1244                                         fcpattern, &fcres);
1245
1246                         /* Allocate memory for the new cache entry. */
1247                         if (frclen >= frccap) {
1248                                 frccap += 16;
1249                                 frc = xrealloc(frc, frccap * sizeof(Fontcache));
1250                         }
1251
1252                         frc[frclen].font = XftFontOpenPattern(xw.dpy,
1253                                         fontpattern);
1254                         if (!frc[frclen].font)
1255                                 die("XftFontOpenPattern failed seeking fallback font: %s\n",
1256                                         strerror(errno));
1257                         frc[frclen].flags = frcflags;
1258                         frc[frclen].unicodep = rune;
1259
1260                         glyphidx = XftCharIndex(xw.dpy, frc[frclen].font, rune);
1261
1262                         f = frclen;
1263                         frclen++;
1264
1265                         FcPatternDestroy(fcpattern);
1266                         FcCharSetDestroy(fccharset);
1267                 }
1268
1269                 specs[numspecs].font = frc[f].font;
1270                 specs[numspecs].glyph = glyphidx;
1271                 specs[numspecs].x = (short)xp;
1272                 specs[numspecs].y = (short)yp;
1273                 xp += runewidth;
1274                 numspecs++;
1275         }
1276
1277         return numspecs;
1278 }
1279
1280 void
1281 xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, int y)
1282 {
1283         int charlen = len * ((base.mode & ATTR_WIDE) ? 2 : 1);
1284         int winx = borderpx + x * win.cw, winy = borderpx + y * win.ch,
1285             width = charlen * win.cw;
1286         Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
1287         XRenderColor colfg, colbg;
1288         XRectangle r;
1289
1290         /* Fallback on color display for attributes not supported by the font */
1291         if (base.mode & ATTR_ITALIC && base.mode & ATTR_BOLD) {
1292                 if (dc.ibfont.badslant || dc.ibfont.badweight)
1293                         base.fg = defaultattr;
1294         } else if ((base.mode & ATTR_ITALIC && dc.ifont.badslant) ||
1295             (base.mode & ATTR_BOLD && dc.bfont.badweight)) {
1296                 base.fg = defaultattr;
1297         }
1298
1299         if (IS_TRUECOL(base.fg)) {
1300                 colfg.alpha = 0xffff;
1301                 colfg.red = TRUERED(base.fg);
1302                 colfg.green = TRUEGREEN(base.fg);
1303                 colfg.blue = TRUEBLUE(base.fg);
1304                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
1305                 fg = &truefg;
1306         } else {
1307                 fg = &dc.col[base.fg];
1308         }
1309
1310         if (IS_TRUECOL(base.bg)) {
1311                 colbg.alpha = 0xffff;
1312                 colbg.green = TRUEGREEN(base.bg);
1313                 colbg.red = TRUERED(base.bg);
1314                 colbg.blue = TRUEBLUE(base.bg);
1315                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
1316                 bg = &truebg;
1317         } else {
1318                 bg = &dc.col[base.bg];
1319         }
1320
1321         /* Change basic system colors [0-7] to bright system colors [8-15] */
1322         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_BOLD && BETWEEN(base.fg, 0, 7))
1323                 fg = &dc.col[base.fg + 8];
1324
1325         if (IS_SET(MODE_REVERSE)) {
1326                 if (fg == &dc.col[defaultfg]) {
1327                         fg = &dc.col[defaultbg];
1328                 } else {
1329                         colfg.red = ~fg->color.red;
1330                         colfg.green = ~fg->color.green;
1331                         colfg.blue = ~fg->color.blue;
1332                         colfg.alpha = fg->color.alpha;
1333                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
1334                                         &revfg);
1335                         fg = &revfg;
1336                 }
1337
1338                 if (bg == &dc.col[defaultbg]) {
1339                         bg = &dc.col[defaultfg];
1340                 } else {
1341                         colbg.red = ~bg->color.red;
1342                         colbg.green = ~bg->color.green;
1343                         colbg.blue = ~bg->color.blue;
1344                         colbg.alpha = bg->color.alpha;
1345                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
1346                                         &revbg);
1347                         bg = &revbg;
1348                 }
1349         }
1350
1351         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_FAINT) {
1352                 colfg.red = fg->color.red / 2;
1353                 colfg.green = fg->color.green / 2;
1354                 colfg.blue = fg->color.blue / 2;
1355                 colfg.alpha = fg->color.alpha;
1356                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
1357                 fg = &revfg;
1358         }
1359
1360         if (base.mode & ATTR_REVERSE) {
1361                 temp = fg;
1362                 fg = bg;
1363                 bg = temp;
1364         }
1365
1366         if (base.mode & ATTR_BLINK && win.mode & MODE_BLINK)
1367                 fg = bg;
1368
1369         if (base.mode & ATTR_INVISIBLE)
1370                 fg = bg;
1371
1372         /* Intelligent cleaning up of the borders. */
1373         if (x == 0) {
1374                 xclear(0, (y == 0)? 0 : winy, borderpx,
1375                         winy + win.ch +
1376                         ((winy + win.ch >= borderpx + win.th)? win.h : 0));
1377         }
1378         if (winx + width >= borderpx + win.tw) {
1379                 xclear(winx + width, (y == 0)? 0 : winy, win.w,
1380                         ((winy + win.ch >= borderpx + win.th)? win.h : (winy + win.ch)));
1381         }
1382         if (y == 0)
1383                 xclear(winx, 0, winx + width, borderpx);
1384         if (winy + win.ch >= borderpx + win.th)
1385                 xclear(winx, winy + win.ch, winx + width, win.h);
1386
1387         /* Clean up the region we want to draw to. */
1388         XftDrawRect(xw.draw, bg, winx, winy, width, win.ch);
1389
1390         /* Set the clip region because Xft is sometimes dirty. */
1391         r.x = 0;
1392         r.y = 0;
1393         r.height = win.ch;
1394         r.width = width;
1395         XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
1396
1397         /* Render the glyphs. */
1398         XftDrawGlyphFontSpec(xw.draw, fg, specs, len);
1399
1400         /* Render underline and strikethrough. */
1401         if (base.mode & ATTR_UNDERLINE) {
1402                 XftDrawRect(xw.draw, fg, winx, winy + dc.font.ascent + 1,
1403                                 width, 1);
1404         }
1405
1406         if (base.mode & ATTR_STRUCK) {
1407                 XftDrawRect(xw.draw, fg, winx, winy + 2 * dc.font.ascent / 3,
1408                                 width, 1);
1409         }
1410
1411         /* Reset clip to none. */
1412         XftDrawSetClip(xw.draw, 0);
1413 }
1414
1415 void
1416 xdrawglyph(Glyph g, int x, int y)
1417 {
1418         int numspecs;
1419         XftGlyphFontSpec spec;
1420
1421         numspecs = xmakeglyphfontspecs(&spec, &g, 1, x, y);
1422         xdrawglyphfontspecs(&spec, g, numspecs, x, y);
1423 }
1424
1425 void
1426 xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og)
1427 {
1428         Color drawcol;
1429
1430         /* remove the old cursor */
1431         if (selected(ox, oy))
1432                 og.mode ^= ATTR_REVERSE;
1433         xdrawglyph(og, ox, oy);
1434
1435         if (IS_SET(MODE_HIDE))
1436                 return;
1437
1438         /*
1439          * Select the right color for the right mode.
1440          */
1441         g.mode &= ATTR_BOLD|ATTR_ITALIC|ATTR_UNDERLINE|ATTR_STRUCK|ATTR_WIDE;
1442
1443         if (IS_SET(MODE_REVERSE)) {
1444                 g.mode |= ATTR_REVERSE;
1445                 g.bg = defaultfg;
1446                 if (selected(cx, cy)) {
1447                         drawcol = dc.col[defaultcs];
1448                         g.fg = defaultrcs;
1449                 } else {
1450                         drawcol = dc.col[defaultrcs];
1451                         g.fg = defaultcs;
1452                 }
1453         } else {
1454                 if (selected(cx, cy)) {
1455                         g.fg = defaultfg;
1456                         g.bg = defaultrcs;
1457                 } else {
1458                         g.fg = defaultbg;
1459                         g.bg = defaultcs;
1460                 }
1461                 drawcol = dc.col[g.bg];
1462         }
1463
1464         /* draw the new one */
1465         if (IS_SET(MODE_FOCUSED)) {
1466                 switch (win.cursor) {
1467                 case 7: /* st extension: snowman (U+2603) */
1468                         g.u = 0x2603;
1469                 case 0: /* Blinking Block */
1470                 case 1: /* Blinking Block (Default) */
1471                 case 2: /* Steady Block */
1472                         xdrawglyph(g, cx, cy);
1473                         break;
1474                 case 3: /* Blinking Underline */
1475                 case 4: /* Steady Underline */
1476                         XftDrawRect(xw.draw, &drawcol,
1477                                         borderpx + cx * win.cw,
1478                                         borderpx + (cy + 1) * win.ch - \
1479                                                 cursorthickness,
1480                                         win.cw, cursorthickness);
1481                         break;
1482                 case 5: /* Blinking bar */
1483                 case 6: /* Steady bar */
1484                         XftDrawRect(xw.draw, &drawcol,
1485                                         borderpx + cx * win.cw,
1486                                         borderpx + cy * win.ch,
1487                                         cursorthickness, win.ch);
1488                         break;
1489                 }
1490         } else {
1491                 XftDrawRect(xw.draw, &drawcol,
1492                                 borderpx + cx * win.cw,
1493                                 borderpx + cy * win.ch,
1494                                 win.cw - 1, 1);
1495                 XftDrawRect(xw.draw, &drawcol,
1496                                 borderpx + cx * win.cw,
1497                                 borderpx + cy * win.ch,
1498                                 1, win.ch - 1);
1499                 XftDrawRect(xw.draw, &drawcol,
1500                                 borderpx + (cx + 1) * win.cw - 1,
1501                                 borderpx + cy * win.ch,
1502                                 1, win.ch - 1);
1503                 XftDrawRect(xw.draw, &drawcol,
1504                                 borderpx + cx * win.cw,
1505                                 borderpx + (cy + 1) * win.ch - 1,
1506                                 win.cw, 1);
1507         }
1508 }
1509
1510 void
1511 xsetenv(void)
1512 {
1513         char buf[sizeof(long) * 8 + 1];
1514
1515         snprintf(buf, sizeof(buf), "%lu", xw.win);
1516         setenv("WINDOWID", buf, 1);
1517 }
1518
1519 void
1520 xsettitle(char *p)
1521 {
1522         XTextProperty prop;
1523         DEFAULT(p, opt_title);
1524
1525         Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
1526                         &prop);
1527         XSetWMName(xw.dpy, xw.win, &prop);
1528         XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
1529         XFree(prop.value);
1530 }
1531
1532 int
1533 xstartdraw(void)
1534 {
1535         return IS_SET(MODE_VISIBLE);
1536 }
1537
1538 void
1539 xdrawline(Line line, int x1, int y1, int x2)
1540 {
1541         int i, x, ox, numspecs;
1542         Glyph base, new;
1543         XftGlyphFontSpec *specs = xw.specbuf;
1544
1545         numspecs = xmakeglyphfontspecs(specs, &line[x1], x2 - x1, x1, y1);
1546         i = ox = 0;
1547         for (x = x1; x < x2 && i < numspecs; x++) {
1548                 new = line[x];
1549                 if (new.mode == ATTR_WDUMMY)
1550                         continue;
1551                 if (selected(x, y1))
1552                         new.mode ^= ATTR_REVERSE;
1553                 if (i > 0 && ATTRCMP(base, new)) {
1554                         xdrawglyphfontspecs(specs, base, i, ox, y1);
1555                         specs += i;
1556                         numspecs -= i;
1557                         i = 0;
1558                 }
1559                 if (i == 0) {
1560                         ox = x;
1561                         base = new;
1562                 }
1563                 i++;
1564         }
1565         if (i > 0)
1566                 xdrawglyphfontspecs(specs, base, i, ox, y1);
1567 }
1568
1569 void
1570 xfinishdraw(void)
1571 {
1572         XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, win.w,
1573                         win.h, 0, 0);
1574         XSetForeground(xw.dpy, dc.gc,
1575                         dc.col[IS_SET(MODE_REVERSE)?
1576                                 defaultfg : defaultbg].pixel);
1577 }
1578
1579 void
1580 xximspot(int x, int y)
1581 {
1582         XPoint spot = { borderpx + x * win.cw, borderpx + (y + 1) * win.ch };
1583         XVaNestedList attr = XVaCreateNestedList(0, XNSpotLocation, &spot, NULL);
1584
1585         XSetICValues(xw.xic, XNPreeditAttributes, attr, NULL);
1586         XFree(attr);
1587 }
1588
1589 void
1590 expose(XEvent *ev)
1591 {
1592         redraw();
1593 }
1594
1595 void
1596 visibility(XEvent *ev)
1597 {
1598         XVisibilityEvent *e = &ev->xvisibility;
1599
1600         MODBIT(win.mode, e->state != VisibilityFullyObscured, MODE_VISIBLE);
1601 }
1602
1603 void
1604 unmap(XEvent *ev)
1605 {
1606         win.mode &= ~MODE_VISIBLE;
1607 }
1608
1609 void
1610 xsetpointermotion(int set)
1611 {
1612         MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
1613         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
1614 }
1615
1616 void
1617 xsetmode(int set, unsigned int flags)
1618 {
1619         int mode = win.mode;
1620         MODBIT(win.mode, set, flags);
1621         if ((win.mode & MODE_REVERSE) != (mode & MODE_REVERSE))
1622                 redraw();
1623 }
1624
1625 int
1626 xsetcursor(int cursor)
1627 {
1628         DEFAULT(cursor, 1);
1629         if (!BETWEEN(cursor, 0, 6))
1630                 return 1;
1631         win.cursor = cursor;
1632         return 0;
1633 }
1634
1635 void
1636 xseturgency(int add)
1637 {
1638         XWMHints *h = XGetWMHints(xw.dpy, xw.win);
1639
1640         MODBIT(h->flags, add, XUrgencyHint);
1641         XSetWMHints(xw.dpy, xw.win, h);
1642         XFree(h);
1643 }
1644
1645 void
1646 xbell(void)
1647 {
1648         if (!(IS_SET(MODE_FOCUSED)))
1649                 xseturgency(1);
1650         if (bellvolume)
1651                 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
1652 }
1653
1654 void
1655 focus(XEvent *ev)
1656 {
1657         XFocusChangeEvent *e = &ev->xfocus;
1658
1659         if (e->mode == NotifyGrab)
1660                 return;
1661
1662         if (ev->type == FocusIn) {
1663                 XSetICFocus(xw.xic);
1664                 win.mode |= MODE_FOCUSED;
1665                 xseturgency(0);
1666                 if (IS_SET(MODE_FOCUS))
1667                         ttywrite("\033[I", 3, 0);
1668         } else {
1669                 XUnsetICFocus(xw.xic);
1670                 win.mode &= ~MODE_FOCUSED;
1671                 if (IS_SET(MODE_FOCUS))
1672                         ttywrite("\033[O", 3, 0);
1673         }
1674 }
1675
1676 int
1677 match(uint mask, uint state)
1678 {
1679         return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
1680 }
1681
1682 char*
1683 kmap(KeySym k, uint state)
1684 {
1685         Key *kp;
1686         int i;
1687
1688         /* Check for mapped keys out of X11 function keys. */
1689         for (i = 0; i < LEN(mappedkeys); i++) {
1690                 if (mappedkeys[i] == k)
1691                         break;
1692         }
1693         if (i == LEN(mappedkeys)) {
1694                 if ((k & 0xFFFF) < 0xFD00)
1695                         return NULL;
1696         }
1697
1698         for (kp = key; kp < key + LEN(key); kp++) {
1699                 if (kp->k != k)
1700                         continue;
1701
1702                 if (!match(kp->mask, state))
1703                         continue;
1704
1705                 if (IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
1706                         continue;
1707                 if (IS_SET(MODE_NUMLOCK) && kp->appkey == 2)
1708                         continue;
1709
1710                 if (IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
1711                         continue;
1712
1713                 return kp->s;
1714         }
1715
1716         return NULL;
1717 }
1718
1719 void
1720 kpress(XEvent *ev)
1721 {
1722         XKeyEvent *e = &ev->xkey;
1723         KeySym ksym;
1724         char buf[32], *customkey;
1725         int len;
1726         Rune c;
1727         Status status;
1728         Shortcut *bp;
1729
1730         if (IS_SET(MODE_KBDLOCK))
1731                 return;
1732
1733         len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
1734         /* 1. shortcuts */
1735         for (bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
1736                 if (ksym == bp->keysym && match(bp->mod, e->state)) {
1737                         bp->func(&(bp->arg));
1738                         return;
1739                 }
1740         }
1741
1742         /* 2. custom keys from config.h */
1743         if ((customkey = kmap(ksym, e->state))) {
1744                 ttywrite(customkey, strlen(customkey), 1);
1745                 return;
1746         }
1747
1748         /* 3. composed string from input method */
1749         if (len == 0)
1750                 return;
1751         if (len == 1 && e->state & Mod1Mask) {
1752                 if (IS_SET(MODE_8BIT)) {
1753                         if (*buf < 0177) {
1754                                 c = *buf | 0x80;
1755                                 len = utf8encode(c, buf);
1756                         }
1757                 } else {
1758                         buf[1] = buf[0];
1759                         buf[0] = '\033';
1760                         len = 2;
1761                 }
1762         }
1763         ttywrite(buf, len, 1);
1764 }
1765
1766 void
1767 cmessage(XEvent *e)
1768 {
1769         /*
1770          * See xembed specs
1771          *  http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
1772          */
1773         if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
1774                 if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
1775                         win.mode |= MODE_FOCUSED;
1776                         xseturgency(0);
1777                 } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
1778                         win.mode &= ~MODE_FOCUSED;
1779                 }
1780         } else if (e->xclient.data.l[0] == xw.wmdeletewin) {
1781                 ttyhangup();
1782                 exit(0);
1783         }
1784 }
1785
1786 void
1787 resize(XEvent *e)
1788 {
1789         if (e->xconfigure.width == win.w && e->xconfigure.height == win.h)
1790                 return;
1791
1792         cresize(e->xconfigure.width, e->xconfigure.height);
1793 }
1794
1795 void
1796 run(void)
1797 {
1798         XEvent ev;
1799         int w = win.w, h = win.h;
1800         fd_set rfd;
1801         int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
1802         int ttyfd;
1803         struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
1804         long deltatime;
1805
1806         /* Waiting for window mapping */
1807         do {
1808                 XNextEvent(xw.dpy, &ev);
1809                 /*
1810                  * This XFilterEvent call is required because of XOpenIM. It
1811                  * does filter out the key event and some client message for
1812                  * the input method too.
1813                  */
1814                 if (XFilterEvent(&ev, None))
1815                         continue;
1816                 if (ev.type == ConfigureNotify) {
1817                         w = ev.xconfigure.width;
1818                         h = ev.xconfigure.height;
1819                 }
1820         } while (ev.type != MapNotify);
1821
1822         ttyfd = ttynew(opt_line, shell, opt_io, opt_cmd);
1823         cresize(w, h);
1824
1825         clock_gettime(CLOCK_MONOTONIC, &last);
1826         lastblink = last;
1827
1828         for (xev = actionfps;;) {
1829                 FD_ZERO(&rfd);
1830                 FD_SET(ttyfd, &rfd);
1831                 FD_SET(xfd, &rfd);
1832
1833                 if (pselect(MAX(xfd, ttyfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
1834                         if (errno == EINTR)
1835                                 continue;
1836                         die("select failed: %s\n", strerror(errno));
1837                 }
1838                 if (FD_ISSET(ttyfd, &rfd)) {
1839                         ttyread();
1840                         if (blinktimeout) {
1841                                 blinkset = tattrset(ATTR_BLINK);
1842                                 if (!blinkset)
1843                                         MODBIT(win.mode, 0, MODE_BLINK);
1844                         }
1845                 }
1846
1847                 if (FD_ISSET(xfd, &rfd))
1848                         xev = actionfps;
1849
1850                 clock_gettime(CLOCK_MONOTONIC, &now);
1851                 drawtimeout.tv_sec = 0;
1852                 drawtimeout.tv_nsec =  (1000 * 1E6)/ xfps;
1853                 tv = &drawtimeout;
1854
1855                 dodraw = 0;
1856                 if (blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
1857                         tsetdirtattr(ATTR_BLINK);
1858                         win.mode ^= MODE_BLINK;
1859                         lastblink = now;
1860                         dodraw = 1;
1861                 }
1862                 deltatime = TIMEDIFF(now, last);
1863                 if (deltatime > 1000 / (xev ? xfps : actionfps)) {
1864                         dodraw = 1;
1865                         last = now;
1866                 }
1867
1868                 if (dodraw) {
1869                         while (XPending(xw.dpy)) {
1870                                 XNextEvent(xw.dpy, &ev);
1871                                 if (XFilterEvent(&ev, None))
1872                                         continue;
1873                                 if (handler[ev.type])
1874                                         (handler[ev.type])(&ev);
1875                         }
1876
1877                         draw();
1878                         XFlush(xw.dpy);
1879
1880                         if (xev && !FD_ISSET(xfd, &rfd))
1881                                 xev--;
1882                         if (!FD_ISSET(ttyfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
1883                                 if (blinkset) {
1884                                         if (TIMEDIFF(now, lastblink) \
1885                                                         > blinktimeout) {
1886                                                 drawtimeout.tv_nsec = 1000;
1887                                         } else {
1888                                                 drawtimeout.tv_nsec = (1E6 * \
1889                                                         (blinktimeout - \
1890                                                         TIMEDIFF(now,
1891                                                                 lastblink)));
1892                                         }
1893                                         drawtimeout.tv_sec = \
1894                                             drawtimeout.tv_nsec / 1E9;
1895                                         drawtimeout.tv_nsec %= (long)1E9;
1896                                 } else {
1897                                         tv = NULL;
1898                                 }
1899                         }
1900                 }
1901         }
1902 }
1903
1904 void
1905 usage(void)
1906 {
1907         die("usage: %s [-aiv] [-c class] [-f font] [-g geometry]"
1908             " [-n name] [-o file]\n"
1909             "          [-T title] [-t title] [-w windowid]"
1910             " [[-e] command [args ...]]\n"
1911             "       %s [-aiv] [-c class] [-f font] [-g geometry]"
1912             " [-n name] [-o file]\n"
1913             "          [-T title] [-t title] [-w windowid] -l line"
1914             " [stty_args ...]\n", argv0, argv0);
1915 }
1916
1917 int
1918 main(int argc, char *argv[])
1919 {
1920         xw.l = xw.t = 0;
1921         xw.isfixed = False;
1922         win.cursor = cursorshape;
1923
1924         ARGBEGIN {
1925         case 'a':
1926                 allowaltscreen = 0;
1927                 break;
1928         case 'c':
1929                 opt_class = EARGF(usage());
1930                 break;
1931         case 'e':
1932                 if (argc > 0)
1933                         --argc, ++argv;
1934                 goto run;
1935         case 'f':
1936                 opt_font = EARGF(usage());
1937                 break;
1938         case 'g':
1939                 xw.gm = XParseGeometry(EARGF(usage()),
1940                                 &xw.l, &xw.t, &cols, &rows);
1941                 break;
1942         case 'i':
1943                 xw.isfixed = 1;
1944                 break;
1945         case 'o':
1946                 opt_io = EARGF(usage());
1947                 break;
1948         case 'l':
1949                 opt_line = EARGF(usage());
1950                 break;
1951         case 'n':
1952                 opt_name = EARGF(usage());
1953                 break;
1954         case 't':
1955         case 'T':
1956                 opt_title = EARGF(usage());
1957                 break;
1958         case 'w':
1959                 opt_embed = EARGF(usage());
1960                 break;
1961         case 'v':
1962                 die("%s " VERSION "\n", argv0);
1963                 break;
1964         default:
1965                 usage();
1966         } ARGEND;
1967
1968 run:
1969         if (argc > 0) /* eat all remaining arguments */
1970                 opt_cmd = argv;
1971
1972         if (!opt_title)
1973                 opt_title = (opt_line || !opt_cmd) ? "st" : opt_cmd[0];
1974
1975         setlocale(LC_CTYPE, "");
1976         XSetLocaleModifiers("");
1977         cols = MAX(cols, 1);
1978         rows = MAX(rows, 1);
1979         tnew(cols, rows);
1980         xinit(cols, rows);
1981         xsetenv();
1982         selinit();
1983         run();
1984
1985         return 0;
1986 }