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 mod;
  33         uint button;
  34         void (*func)(const Arg *);
  35         const Arg arg;
  36 } MouseShortcut;
  37
  38 typedef struct {
  39         KeySym k;
  40         uint mask;
  41         char *s;
  42         /* three-valued logic variables: 0 indifferent, 1 on, -1 off */
  43         signed char appkey;    /* application keypad */
  44         signed char appcursor; /* application cursor */
  45 } Key;
  46
  47 /* X modifiers */
  48 #define XK_ANY_MOD    UINT_MAX
  49 #define XK_NO_MOD     0
  50 #define XK_SWITCH_MOD (1<<13)
  51
  52 /* function definitions used in config.h */
  53 static void clipcopy(const Arg *);
  54 static void clippaste(const Arg *);
  55 static void numlock(const Arg *);
  56 static void selpaste(const Arg *);
  57 static void zoom(const Arg *);
  58 static void zoomabs(const Arg *);
  59 static void zoomreset(const Arg *);
  60 static void ttysend(const Arg *);
  61
  62 /* config.h for applying patches and the configuration. */
  63 #include "config.h"
  64
  65 /* XEMBED messages */
  66 #define XEMBED_FOCUS_IN  4
  67 #define XEMBED_FOCUS_OUT 5
  68
  69 /* macros */
  70 #define IS_SET(flag)            ((win.mode & (flag)) != 0)
  71 #define TRUERED(x)              (((x) & 0xff0000) >> 8)
  72 #define TRUEGREEN(x)            (((x) & 0xff00))
  73 #define TRUEBLUE(x)             (((x) & 0xff) << 8)
  74
  75 typedef XftDraw *Draw;
  76 typedef XftColor Color;
  77 typedef XftGlyphFontSpec GlyphFontSpec;
  78
  79 /* Purely graphic info */
  80 typedef struct {
  81         int tw, th; /* tty width and height */
  82         int w, h; /* window width and height */
  83         int ch; /* char height */
  84         int cw; /* char width  */
  85         int mode; /* window state/mode flags */
  86         int cursor; /* cursor style */
  87 } TermWindow;
  88
  89 typedef struct {
  90         Display *dpy;
  91         Colormap cmap;
  92         Window win;
  93         Drawable buf;
  94         GlyphFontSpec *specbuf; /* font spec buffer used for rendering */
  95         Atom xembed, wmdeletewin, netwmname, netwmpid;
  96         XIM xim;
  97         XIC xic;
  98         Draw draw;
  99         Visual *vis;
 100         XSetWindowAttributes attrs;
 101         int scr;
 102         int isfixed; /* is fixed geometry? */
 103         int l, t; /* left and top offset */
 104         int gm; /* geometry mask */
 105 } XWindow;
 106
 107 typedef struct {
 108         Atom xtarget;
 109         char *primary, *clipboard;
 110         struct timespec tclick1;
 111         struct timespec tclick2;
 112 } XSelection;
 113
 114 /* Font structure */
 115 #define Font Font_
 116 typedef struct {
 117         int height;
 118         int width;
 119         int ascent;
 120         int descent;
 121         int badslant;
 122         int badweight;
 123         short lbearing;
 124         short rbearing;
 125         XftFont *match;
 126         FcFontSet *set;
 127         FcPattern *pattern;
 128 } Font;
 129
 130 /* Drawing Context */
 131 typedef struct {
 132         Color *col;
 133         size_t collen;
 134         Font font, bfont, ifont, ibfont;
 135         GC gc;
 136 } DC;
 137
 138 static inline ushort sixd_to_16bit(int);
 139 static int xmakeglyphfontspecs(XftGlyphFontSpec *, const Glyph *, int, int, int);
 140 static void xdrawglyphfontspecs(const XftGlyphFontSpec *, Glyph, int, int, int);
 141 static void xdrawglyph(Glyph, int, int);
 142 static void xclear(int, int, int, int);
 143 static int xgeommasktogravity(int);
 144 static void ximopen(Display *);
 145 static void ximinstantiate(Display *, XPointer, XPointer);
 146 static void ximdestroy(XIM, XPointer, XPointer);
 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 = NULL;
 232 static int frclen = 0;
 233 static int frccap = 0;
 234 static char *usedfont = NULL;
 235 static double usedfontsize = 0;
 236 static double defaultfontsize = 0;
 237
 238 static char *opt_class = NULL;
 239 static char **opt_cmd  = NULL;
 240 static char *opt_embed = NULL;
 241 static char *opt_font  = NULL;
 242 static char *opt_io    = NULL;
 243 static char *opt_line  = NULL;
 244 static char *opt_name  = NULL;
 245 static char *opt_title = NULL;
 246
 247 static int oldbutton = 3; /* button event on startup: 3 = release */
 248
 249 void
 250 clipcopy(const Arg *dummy)
 251 {
 252         Atom clipboard;
 253
 254         free(xsel.clipboard);
 255         xsel.clipboard = NULL;
 256
 257         if (xsel.primary != NULL) {
 258                 xsel.clipboard = xstrdup(xsel.primary);
 259                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 260                 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
 261         }
 262 }
 263
 264 void
 265 clippaste(const Arg *dummy)
 266 {
 267         Atom clipboard;
 268
 269         clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 270         XConvertSelection(xw.dpy, clipboard, xsel.xtarget, clipboard,
 271                         xw.win, CurrentTime);
 272 }
 273
 274 void
 275 selpaste(const Arg *dummy)
 276 {
 277         XConvertSelection(xw.dpy, XA_PRIMARY, xsel.xtarget, XA_PRIMARY,
 278                         xw.win, CurrentTime);
 279 }
 280
 281 void
 282 numlock(const Arg *dummy)
 283 {
 284         win.mode ^= MODE_NUMLOCK;
 285 }
 286
 287 void
 288 zoom(const Arg *arg)
 289 {
 290         Arg larg;
 291
 292         larg.f = usedfontsize + arg->f;
 293         zoomabs(&larg);
 294 }
 295
 296 void
 297 zoomabs(const Arg *arg)
 298 {
 299         xunloadfonts();
 300         xloadfonts(usedfont, arg->f);
 301         cresize(0, 0);
 302         redraw();
 303         xhints();
 304 }
 305
 306 void
 307 zoomreset(const Arg *arg)
 308 {
 309         Arg larg;
 310
 311         if (defaultfontsize > 0) {
 312                 larg.f = defaultfontsize;
 313                 zoomabs(&larg);
 314         }
 315 }
 316
 317 void
 318 ttysend(const Arg *arg)
 319 {
 320         ttywrite(arg->s, strlen(arg->s), 1);
 321 }
 322
 323 int
 324 evcol(XEvent *e)
 325 {
 326         int x = e->xbutton.x - borderpx;
 327         LIMIT(x, 0, win.tw - 1);
 328         return x / win.cw;
 329 }
 330
 331 int
 332 evrow(XEvent *e)
 333 {
 334         int y = e->xbutton.y - borderpx;
 335         LIMIT(y, 0, win.th - 1);
 336         return y / win.ch;
 337 }
 338
 339 void
 340 mousesel(XEvent *e, int done)
 341 {
 342         int type, seltype = SEL_REGULAR;
 343         uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
 344
 345         for (type = 1; type < LEN(selmasks); ++type) {
 346                 if (match(selmasks[type], state)) {
 347                         seltype = type;
 348                         break;
 349                 }
 350         }
 351         selextend(evcol(e), evrow(e), seltype, done);
 352         if (done)
 353                 setsel(getsel(), e->xbutton.time);
 354 }
 355
 356 void
 357 mousereport(XEvent *e)
 358 {
 359         int len, x = evcol(e), y = evrow(e),
 360             button = e->xbutton.button, state = e->xbutton.state;
 361         char buf[40];
 362         static int ox, oy;
 363
 364         /* from urxvt */
 365         if (e->xbutton.type == MotionNotify) {
 366                 if (x == ox && y == oy)
 367                         return;
 368                 if (!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
 369                         return;
 370                 /* MOUSE_MOTION: no reporting if no button is pressed */
 371                 if (IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
 372                         return;
 373
 374                 button = oldbutton + 32;
 375                 ox = x;
 376                 oy = y;
 377         } else {
 378                 if (!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
 379                         button = 3;
 380                 } else {
 381                         button -= Button1;
 382                         if (button >= 3)
 383                                 button += 64 - 3;
 384                 }
 385                 if (e->xbutton.type == ButtonPress) {
 386                         oldbutton = button;
 387                         ox = x;
 388                         oy = y;
 389                 } else if (e->xbutton.type == ButtonRelease) {
 390                         oldbutton = 3;
 391                         /* MODE_MOUSEX10: no button release reporting */
 392                         if (IS_SET(MODE_MOUSEX10))
 393                                 return;
 394                         if (button == 64 || button == 65)
 395                                 return;
 396                 }
 397         }
 398
 399         if (!IS_SET(MODE_MOUSEX10)) {
 400                 button += ((state & ShiftMask  ) ? 4  : 0)
 401                         + ((state & Mod4Mask   ) ? 8  : 0)
 402                         + ((state & ControlMask) ? 16 : 0);
 403         }
 404
 405         if (IS_SET(MODE_MOUSESGR)) {
 406                 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
 407                                 button, x+1, y+1,
 408                                 e->xbutton.type == ButtonRelease ? 'm' : 'M');
 409         } else if (x < 223 && y < 223) {
 410                 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
 411                                 32+button, 32+x+1, 32+y+1);
 412         } else {
 413                 return;
 414         }
 415
 416         ttywrite(buf, len, 0);
 417 }
 418
 419 void
 420 bpress(XEvent *e)
 421 {
 422         struct timespec now;
 423         MouseShortcut *ms;
 424         int snap;
 425
 426         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 427                 mousereport(e);
 428                 return;
 429         }
 430
 431         for (ms = mshortcuts; ms < mshortcuts + LEN(mshortcuts); ms++) {
 432                 if (e->xbutton.button == ms->button
 433                                 && match(ms->mod, e->xbutton.state)) {
 434                         ms->func(&(ms->arg));
 435                         return;
 436                 }
 437         }
 438
 439         if (e->xbutton.button == Button1) {
 440                 /*
 441                  * If the user clicks below predefined timeouts specific
 442                  * snapping behaviour is exposed.
 443                  */
 444                 clock_gettime(CLOCK_MONOTONIC, &now);
 445                 if (TIMEDIFF(now, xsel.tclick2) <= tripleclicktimeout) {
 446                         snap = SNAP_LINE;
 447                 } else if (TIMEDIFF(now, xsel.tclick1) <= doubleclicktimeout) {
 448                         snap = SNAP_WORD;
 449                 } else {
 450                         snap = 0;
 451                 }
 452                 xsel.tclick2 = xsel.tclick1;
 453                 xsel.tclick1 = now;
 454
 455                 selstart(evcol(e), evrow(e), snap);
 456         }
 457 }
 458
 459 void
 460 propnotify(XEvent *e)
 461 {
 462         XPropertyEvent *xpev;
 463         Atom clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 464
 465         xpev = &e->xproperty;
 466         if (xpev->state == PropertyNewValue &&
 467                         (xpev->atom == XA_PRIMARY ||
 468                          xpev->atom == clipboard)) {
 469                 selnotify(e);
 470         }
 471 }
 472
 473 void
 474 selnotify(XEvent *e)
 475 {
 476         ulong nitems, ofs, rem;
 477         int format;
 478         uchar *data, *last, *repl;
 479         Atom type, incratom, property = None;
 480
 481         incratom = XInternAtom(xw.dpy, "INCR", 0);
 482
 483         ofs = 0;
 484         if (e->type == SelectionNotify)
 485                 property = e->xselection.property;
 486         else if (e->type == PropertyNotify)
 487                 property = e->xproperty.atom;
 488
 489         if (property == None)
 490                 return;
 491
 492         do {
 493                 if (XGetWindowProperty(xw.dpy, xw.win, property, ofs,
 494                                         BUFSIZ/4, False, AnyPropertyType,
 495                                         &type, &format, &nitems, &rem,
 496                                         &data)) {
 497                         fprintf(stderr, "Clipboard allocation failed\n");
 498                         return;
 499                 }
 500
 501                 if (e->type == PropertyNotify && nitems == 0 && rem == 0) {
 502                         /*
 503                          * If there is some PropertyNotify with no data, then
 504                          * this is the signal of the selection owner that all
 505                          * data has been transferred. We won't need to receive
 506                          * PropertyNotify events anymore.
 507                          */
 508                         MODBIT(xw.attrs.event_mask, 0, PropertyChangeMask);
 509                         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
 510                                         &xw.attrs);
 511                 }
 512
 513                 if (type == incratom) {
 514                         /*
 515                          * Activate the PropertyNotify events so we receive
 516                          * when the selection owner does send us the next
 517                          * chunk of data.
 518                          */
 519                         MODBIT(xw.attrs.event_mask, 1, PropertyChangeMask);
 520                         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
 521                                         &xw.attrs);
 522
 523                         /*
 524                          * Deleting the property is the transfer start signal.
 525                          */
 526                         XDeleteProperty(xw.dpy, xw.win, (int)property);
 527                         continue;
 528                 }
 529
 530                 /*
 531                  * As seen in getsel:
 532                  * Line endings are inconsistent in the terminal and GUI world
 533                  * copy and pasting. When receiving some selection data,
 534                  * replace all '\n' with '\r'.
 535                  * FIXME: Fix the computer world.
 536                  */
 537                 repl = data;
 538                 last = data + nitems * format / 8;
 539                 while ((repl = memchr(repl, '\n', last - repl))) {
 540                         *repl++ = '\r';
 541                 }
 542
 543                 if (IS_SET(MODE_BRCKTPASTE) && ofs == 0)
 544                         ttywrite("\033[200~", 6, 0);
 545                 ttywrite((char *)data, nitems * format / 8, 1);
 546                 if (IS_SET(MODE_BRCKTPASTE) && rem == 0)
 547                         ttywrite("\033[201~", 6, 0);
 548                 XFree(data);
 549                 /* number of 32-bit chunks returned */
 550                 ofs += nitems * format / 32;
 551         } while (rem > 0);
 552
 553         /*
 554          * Deleting the property again tells the selection owner to send the
 555          * next data chunk in the property.
 556          */
 557         XDeleteProperty(xw.dpy, xw.win, (int)property);
 558 }
 559
 560 void
 561 xclipcopy(void)
 562 {
 563         clipcopy(NULL);
 564 }
 565
 566 void
 567 selclear_(XEvent *e)
 568 {
 569         selclear();
 570 }
 571
 572 void
 573 selrequest(XEvent *e)
 574 {
 575         XSelectionRequestEvent *xsre;
 576         XSelectionEvent xev;
 577         Atom xa_targets, string, clipboard;
 578         char *seltext;
 579
 580         xsre = (XSelectionRequestEvent *) e;
 581         xev.type = SelectionNotify;
 582         xev.requestor = xsre->requestor;
 583         xev.selection = xsre->selection;
 584         xev.target = xsre->target;
 585         xev.time = xsre->time;
 586         if (xsre->property == None)
 587                 xsre->property = xsre->target;
 588
 589         /* reject */
 590         xev.property = None;
 591
 592         xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
 593         if (xsre->target == xa_targets) {
 594                 /* respond with the supported type */
 595                 string = xsel.xtarget;
 596                 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
 597                                 XA_ATOM, 32, PropModeReplace,
 598                                 (uchar *) &string, 1);
 599                 xev.property = xsre->property;
 600         } else if (xsre->target == xsel.xtarget || xsre->target == XA_STRING) {
 601                 /*
 602                  * xith XA_STRING non ascii characters may be incorrect in the
 603                  * requestor. It is not our problem, use utf8.
 604                  */
 605                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 606                 if (xsre->selection == XA_PRIMARY) {
 607                         seltext = xsel.primary;
 608                 } else if (xsre->selection == clipboard) {
 609                         seltext = xsel.clipboard;
 610                 } else {
 611                         fprintf(stderr,
 612                                 "Unhandled clipboard selection 0x%lx\n",
 613                                 xsre->selection);
 614                         return;
 615                 }
 616                 if (seltext != NULL) {
 617                         XChangeProperty(xsre->display, xsre->requestor,
 618                                         xsre->property, xsre->target,
 619                                         8, PropModeReplace,
 620                                         (uchar *)seltext, strlen(seltext));
 621                         xev.property = xsre->property;
 622                 }
 623         }
 624
 625         /* all done, send a notification to the listener */
 626         if (!XSendEvent(xsre->display, xsre->requestor, 1, 0, (XEvent *) &xev))
 627                 fprintf(stderr, "Error sending SelectionNotify event\n");
 628 }
 629
 630 void
 631 setsel(char *str, Time t)
 632 {
 633         if (!str)
 634                 return;
 635
 636         free(xsel.primary);
 637         xsel.primary = str;
 638
 639         XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
 640         if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
 641                 selclear();
 642 }
 643
 644 void
 645 xsetsel(char *str)
 646 {
 647         setsel(str, CurrentTime);
 648 }
 649
 650 void
 651 brelease(XEvent *e)
 652 {
 653         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 654                 mousereport(e);
 655                 return;
 656         }
 657
 658         if (e->xbutton.button == Button2)
 659                 selpaste(NULL);
 660         else if (e->xbutton.button == Button1)
 661                 mousesel(e, 1);
 662 }
 663
 664 void
 665 bmotion(XEvent *e)
 666 {
 667         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 668                 mousereport(e);
 669                 return;
 670         }
 671
 672         mousesel(e, 0);
 673 }
 674
 675 void
 676 cresize(int width, int height)
 677 {
 678         int col, row;
 679
 680         if (width != 0)
 681                 win.w = width;
 682         if (height != 0)
 683                 win.h = height;
 684
 685         col = (win.w - 2 * borderpx) / win.cw;
 686         row = (win.h - 2 * borderpx) / win.ch;
 687         col = MAX(1, col);
 688         row = MAX(1, row);
 689
 690         tresize(col, row);
 691         xresize(col, row);
 692         ttyresize(win.tw, win.th);
 693 }
 694
 695 void
 696 xresize(int col, int row)
 697 {
 698         win.tw = col * win.cw;
 699         win.th = row * win.ch;
 700
 701         XFreePixmap(xw.dpy, xw.buf);
 702         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
 703                         DefaultDepth(xw.dpy, xw.scr));
 704         XftDrawChange(xw.draw, xw.buf);
 705         xclear(0, 0, win.w, win.h);
 706
 707         /* resize to new width */
 708         xw.specbuf = xrealloc(xw.specbuf, col * sizeof(GlyphFontSpec));
 709 }
 710
 711 ushort
 712 sixd_to_16bit(int x)
 713 {
 714         return x == 0 ? 0 : 0x3737 + 0x2828 * x;
 715 }
 716
 717 int
 718 xloadcolor(int i, const char *name, Color *ncolor)
 719 {
 720         XRenderColor color = { .alpha = 0xffff };
 721
 722         if (!name) {
 723                 if (BETWEEN(i, 16, 255)) { /* 256 color */
 724                         if (i < 6*6*6+16) { /* same colors as xterm */
 725                                 color.red   = sixd_to_16bit( ((i-16)/36)%6 );
 726                                 color.green = sixd_to_16bit( ((i-16)/6) %6 );
 727                                 color.blue  = sixd_to_16bit( ((i-16)/1) %6 );
 728                         } else { /* greyscale */
 729                                 color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
 730                                 color.green = color.blue = color.red;
 731                         }
 732                         return XftColorAllocValue(xw.dpy, xw.vis,
 733                                                   xw.cmap, &color, ncolor);
 734                 } else
 735                         name = colorname[i];
 736         }
 737
 738         return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
 739 }
 740
 741 void
 742 xloadcols(void)
 743 {
 744         int i;
 745         static int loaded;
 746         Color *cp;
 747
 748         if (loaded) {
 749                 for (cp = dc.col; cp < &dc.col[dc.collen]; ++cp)
 750                         XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
 751         } else {
 752                 dc.collen = MAX(LEN(colorname), 256);
 753                 dc.col = xmalloc(dc.collen * sizeof(Color));
 754         }
 755
 756         for (i = 0; i < dc.collen; i++)
 757                 if (!xloadcolor(i, NULL, &dc.col[i])) {
 758                         if (colorname[i])
 759                                 die("could not allocate color '%s'\n", colorname[i]);
 760                         else
 761                                 die("could not allocate color %d\n", i);
 762                 }
 763         loaded = 1;
 764 }
 765
 766 int
 767 xsetcolorname(int x, const char *name)
 768 {
 769         Color ncolor;
 770
 771         if (!BETWEEN(x, 0, dc.collen))
 772                 return 1;
 773
 774         if (!xloadcolor(x, name, &ncolor))
 775                 return 1;
 776
 777         XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
 778         dc.col[x] = ncolor;
 779
 780         return 0;
 781 }
 782
 783 /*
 784  * Absolute coordinates.
 785  */
 786 void
 787 xclear(int x1, int y1, int x2, int y2)
 788 {
 789         XftDrawRect(xw.draw,
 790                         &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
 791                         x1, y1, x2-x1, y2-y1);
 792 }
 793
 794 void
 795 xhints(void)
 796 {
 797         XClassHint class = {opt_name ? opt_name : termname,
 798                             opt_class ? opt_class : termname};
 799         XWMHints wm = {.flags = InputHint, .input = 1};
 800         XSizeHints *sizeh;
 801
 802         sizeh = XAllocSizeHints();
 803
 804         sizeh->flags = PSize | PResizeInc | PBaseSize | PMinSize;
 805         sizeh->height = win.h;
 806         sizeh->width = win.w;
 807         sizeh->height_inc = win.ch;
 808         sizeh->width_inc = win.cw;
 809         sizeh->base_height = 2 * borderpx;
 810         sizeh->base_width = 2 * borderpx;
 811         sizeh->min_height = win.ch + 2 * borderpx;
 812         sizeh->min_width = win.cw + 2 * borderpx;
 813         if (xw.isfixed) {
 814                 sizeh->flags |= PMaxSize;
 815                 sizeh->min_width = sizeh->max_width = win.w;
 816                 sizeh->min_height = sizeh->max_height = win.h;
 817         }
 818         if (xw.gm & (XValue|YValue)) {
 819                 sizeh->flags |= USPosition | PWinGravity;
 820                 sizeh->x = xw.l;
 821                 sizeh->y = xw.t;
 822                 sizeh->win_gravity = xgeommasktogravity(xw.gm);
 823         }
 824
 825         XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
 826                         &class);
 827         XFree(sizeh);
 828 }
 829
 830 int
 831 xgeommasktogravity(int mask)
 832 {
 833         switch (mask & (XNegative|YNegative)) {
 834         case 0:
 835                 return NorthWestGravity;
 836         case XNegative:
 837                 return NorthEastGravity;
 838         case YNegative:
 839                 return SouthWestGravity;
 840         }
 841
 842         return SouthEastGravity;
 843 }
 844
 845 int
 846 xloadfont(Font *f, FcPattern *pattern)
 847 {
 848         FcPattern *configured;
 849         FcPattern *match;
 850         FcResult result;
 851         XGlyphInfo extents;
 852         int wantattr, haveattr;
 853
 854         /*
 855          * Manually configure instead of calling XftMatchFont
 856          * so that we can use the configured pattern for
 857          * "missing glyph" lookups.
 858          */
 859         configured = FcPatternDuplicate(pattern);
 860         if (!configured)
 861                 return 1;
 862
 863         FcConfigSubstitute(NULL, configured, FcMatchPattern);
 864         XftDefaultSubstitute(xw.dpy, xw.scr, configured);
 865
 866         match = FcFontMatch(NULL, configured, &result);
 867         if (!match) {
 868                 FcPatternDestroy(configured);
 869                 return 1;
 870         }
 871
 872         if (!(f->match = XftFontOpenPattern(xw.dpy, match))) {
 873                 FcPatternDestroy(configured);
 874                 FcPatternDestroy(match);
 875                 return 1;
 876         }
 877
 878         if ((XftPatternGetInteger(pattern, "slant", 0, &wantattr) ==
 879             XftResultMatch)) {
 880                 /*
 881                  * Check if xft was unable to find a font with the appropriate
 882                  * slant but gave us one anyway. Try to mitigate.
 883                  */
 884                 if ((XftPatternGetInteger(f->match->pattern, "slant", 0,
 885                     &haveattr) != XftResultMatch) || haveattr < wantattr) {
 886                         f->badslant = 1;
 887                         fputs("font slant does not match\n", stderr);
 888                 }
 889         }
 890
 891         if ((XftPatternGetInteger(pattern, "weight", 0, &wantattr) ==
 892             XftResultMatch)) {
 893                 if ((XftPatternGetInteger(f->match->pattern, "weight", 0,
 894                     &haveattr) != XftResultMatch) || haveattr != wantattr) {
 895                         f->badweight = 1;
 896                         fputs("font weight does not match\n", stderr);
 897                 }
 898         }
 899
 900         XftTextExtentsUtf8(xw.dpy, f->match,
 901                 (const FcChar8 *) ascii_printable,
 902                 strlen(ascii_printable), &extents);
 903
 904         f->set = NULL;
 905         f->pattern = configured;
 906
 907         f->ascent = f->match->ascent;
 908         f->descent = f->match->descent;
 909         f->lbearing = 0;
 910         f->rbearing = f->match->max_advance_width;
 911
 912         f->height = f->ascent + f->descent;
 913         f->width = DIVCEIL(extents.xOff, strlen(ascii_printable));
 914
 915         return 0;
 916 }
 917
 918 void
 919 xloadfonts(char *fontstr, double fontsize)
 920 {
 921         FcPattern *pattern;
 922         double fontval;
 923
 924         if (fontstr[0] == '-')
 925                 pattern = XftXlfdParse(fontstr, False, False);
 926         else
 927                 pattern = FcNameParse((FcChar8 *)fontstr);
 928
 929         if (!pattern)
 930                 die("can't open font %s\n", fontstr);
 931
 932         if (fontsize > 1) {
 933                 FcPatternDel(pattern, FC_PIXEL_SIZE);
 934                 FcPatternDel(pattern, FC_SIZE);
 935                 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
 936                 usedfontsize = fontsize;
 937         } else {
 938                 if (FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval) ==
 939                                 FcResultMatch) {
 940                         usedfontsize = fontval;
 941                 } else if (FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval) ==
 942                                 FcResultMatch) {
 943                         usedfontsize = -1;
 944                 } else {
 945                         /*
 946                          * Default font size is 12, if none given. This is to
 947                          * have a known usedfontsize value.
 948                          */
 949                         FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
 950                         usedfontsize = 12;
 951                 }
 952                 defaultfontsize = usedfontsize;
 953         }
 954
 955         if (xloadfont(&dc.font, pattern))
 956                 die("can't open font %s\n", fontstr);
 957
 958         if (usedfontsize < 0) {
 959                 FcPatternGetDouble(dc.font.match->pattern,
 960                                    FC_PIXEL_SIZE, 0, &fontval);
 961                 usedfontsize = fontval;
 962                 if (fontsize == 0)
 963                         defaultfontsize = fontval;
 964         }
 965
 966         /* Setting character width and height. */
 967         win.cw = ceilf(dc.font.width * cwscale);
 968         win.ch = ceilf(dc.font.height * chscale);
 969
 970         FcPatternDel(pattern, FC_SLANT);
 971         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
 972         if (xloadfont(&dc.ifont, pattern))
 973                 die("can't open font %s\n", fontstr);
 974
 975         FcPatternDel(pattern, FC_WEIGHT);
 976         FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
 977         if (xloadfont(&dc.ibfont, pattern))
 978                 die("can't open font %s\n", fontstr);
 979
 980         FcPatternDel(pattern, FC_SLANT);
 981         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
 982         if (xloadfont(&dc.bfont, pattern))
 983                 die("can't open font %s\n", fontstr);
 984
 985         FcPatternDestroy(pattern);
 986 }
 987
 988 void
 989 xunloadfont(Font *f)
 990 {
 991         XftFontClose(xw.dpy, f->match);
 992         FcPatternDestroy(f->pattern);
 993         if (f->set)
 994                 FcFontSetDestroy(f->set);
 995 }
 996
 997 void
 998 xunloadfonts(void)
 999 {
1000         /* Free the loaded fonts in the font cache.  */
1001         while (frclen > 0)
1002                 XftFontClose(xw.dpy, frc[--frclen].font);
1003
1004         xunloadfont(&dc.font);
1005         xunloadfont(&dc.bfont);
1006         xunloadfont(&dc.ifont);
1007         xunloadfont(&dc.ibfont);
1008 }
1009
1010 void
1011 ximopen(Display *dpy)
1012 {
1013         XIMCallback destroy = { .client_data = NULL, .callback = ximdestroy };
1014
1015         if ((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
1016                 XSetLocaleModifiers("@im=local");
1017                 if ((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
1018                         XSetLocaleModifiers("@im=");
1019                         if ((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL)
1020                                 die("XOpenIM failed. Could not open input device.\n");
1021                 }
1022         }
1023         if (XSetIMValues(xw.xim, XNDestroyCallback, &destroy, NULL) != NULL)
1024                 die("XSetIMValues failed. Could not set input method value.\n");
1025         xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing | XIMStatusNothing,
1026                                 XNClientWindow, xw.win, XNFocusWindow, xw.win, NULL);
1027         if (xw.xic == NULL)
1028                 die("XCreateIC failed. Could not obtain input method.\n");
1029 }
1030
1031 void
1032 ximinstantiate(Display *dpy, XPointer client, XPointer call)
1033 {
1034         ximopen(dpy);
1035         XUnregisterIMInstantiateCallback(xw.dpy, NULL, NULL, NULL,
1036                                         ximinstantiate, NULL);
1037 }
1038
1039 void
1040 ximdestroy(XIM xim, XPointer client, XPointer call)
1041 {
1042         xw.xim = NULL;
1043         XRegisterIMInstantiateCallback(xw.dpy, NULL, NULL, NULL,
1044                                         ximinstantiate, NULL);
1045 }
1046
1047 void
1048 xinit(int cols, int rows)
1049 {
1050         XGCValues gcvalues;
1051         Cursor cursor;
1052         Window parent;
1053         pid_t thispid = getpid();
1054         XColor xmousefg, xmousebg;
1055
1056         if (!(xw.dpy = XOpenDisplay(NULL)))
1057                 die("can't open display\n");
1058         xw.scr = XDefaultScreen(xw.dpy);
1059         xw.vis = XDefaultVisual(xw.dpy, xw.scr);
1060
1061         /* font */
1062         if (!FcInit())
1063                 die("could not init fontconfig.\n");
1064
1065         usedfont = (opt_font == NULL)? font : opt_font;
1066         xloadfonts(usedfont, 0);
1067
1068         /* colors */
1069         xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1070         xloadcols();
1071
1072         /* adjust fixed window geometry */
1073         win.w = 2 * borderpx + cols * win.cw;
1074         win.h = 2 * borderpx + rows * win.ch;
1075         if (xw.gm & XNegative)
1076                 xw.l += DisplayWidth(xw.dpy, xw.scr) - win.w - 2;
1077         if (xw.gm & YNegative)
1078                 xw.t += DisplayHeight(xw.dpy, xw.scr) - win.h - 2;
1079
1080         /* Events */
1081         xw.attrs.background_pixel = dc.col[defaultbg].pixel;
1082         xw.attrs.border_pixel = dc.col[defaultbg].pixel;
1083         xw.attrs.bit_gravity = NorthWestGravity;
1084         xw.attrs.event_mask = FocusChangeMask | KeyPressMask | KeyReleaseMask
1085                 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1086                 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
1087         xw.attrs.colormap = xw.cmap;
1088
1089         if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
1090                 parent = XRootWindow(xw.dpy, xw.scr);
1091         xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
1092                         win.w, win.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
1093                         xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
1094                         | CWEventMask | CWColormap, &xw.attrs);
1095
1096         memset(&gcvalues, 0, sizeof(gcvalues));
1097         gcvalues.graphics_exposures = False;
1098         dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
1099                         &gcvalues);
1100         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
1101                         DefaultDepth(xw.dpy, xw.scr));
1102         XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
1103         XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, win.w, win.h);
1104
1105         /* font spec buffer */
1106         xw.specbuf = xmalloc(cols * sizeof(GlyphFontSpec));
1107
1108         /* Xft rendering context */
1109         xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
1110
1111         /* input methods */
1112         ximopen(xw.dpy);
1113
1114         /* white cursor, black outline */
1115         cursor = XCreateFontCursor(xw.dpy, mouseshape);
1116         XDefineCursor(xw.dpy, xw.win, cursor);
1117
1118         if (XParseColor(xw.dpy, xw.cmap, colorname[mousefg], &xmousefg) == 0) {
1119                 xmousefg.red   = 0xffff;
1120                 xmousefg.green = 0xffff;
1121                 xmousefg.blue  = 0xffff;
1122         }
1123
1124         if (XParseColor(xw.dpy, xw.cmap, colorname[mousebg], &xmousebg) == 0) {
1125                 xmousebg.red   = 0x0000;
1126                 xmousebg.green = 0x0000;
1127                 xmousebg.blue  = 0x0000;
1128         }
1129
1130         XRecolorCursor(xw.dpy, cursor, &xmousefg, &xmousebg);
1131
1132         xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
1133         xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
1134         xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
1135         XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
1136
1137         xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
1138         XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
1139                         PropModeReplace, (uchar *)&thispid, 1);
1140
1141         win.mode = MODE_NUMLOCK;
1142         resettitle();
1143         XMapWindow(xw.dpy, xw.win);
1144         xhints();
1145         XSync(xw.dpy, False);
1146
1147         clock_gettime(CLOCK_MONOTONIC, &xsel.tclick1);
1148         clock_gettime(CLOCK_MONOTONIC, &xsel.tclick2);
1149         xsel.primary = NULL;
1150         xsel.clipboard = NULL;
1151         xsel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
1152         if (xsel.xtarget == None)
1153                 xsel.xtarget = XA_STRING;
1154 }
1155
1156 int
1157 xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x, int y)
1158 {
1159         float winx = borderpx + x * win.cw, winy = borderpx + y * win.ch, xp, yp;
1160         ushort mode, prevmode = USHRT_MAX;
1161         Font *font = &dc.font;
1162         int frcflags = FRC_NORMAL;
1163         float runewidth = win.cw;
1164         Rune rune;
1165         FT_UInt glyphidx;
1166         FcResult fcres;
1167         FcPattern *fcpattern, *fontpattern;
1168         FcFontSet *fcsets[] = { NULL };
1169         FcCharSet *fccharset;
1170         int i, f, numspecs = 0;
1171
1172         for (i = 0, xp = winx, yp = winy + font->ascent; i < len; ++i) {
1173                 /* Fetch rune and mode for current glyph. */
1174                 rune = glyphs[i].u;
1175                 mode = glyphs[i].mode;
1176
1177                 /* Skip dummy wide-character spacing. */
1178                 if (mode == ATTR_WDUMMY)
1179                         continue;
1180
1181                 /* Determine font for glyph if different from previous glyph. */
1182                 if (prevmode != mode) {
1183                         prevmode = mode;
1184                         font = &dc.font;
1185                         frcflags = FRC_NORMAL;
1186                         runewidth = win.cw * ((mode & ATTR_WIDE) ? 2.0f : 1.0f);
1187                         if ((mode & ATTR_ITALIC) && (mode & ATTR_BOLD)) {
1188                                 font = &dc.ibfont;
1189                                 frcflags = FRC_ITALICBOLD;
1190                         } else if (mode & ATTR_ITALIC) {
1191                                 font = &dc.ifont;
1192                                 frcflags = FRC_ITALIC;
1193                         } else if (mode & ATTR_BOLD) {
1194                                 font = &dc.bfont;
1195                                 frcflags = FRC_BOLD;
1196                         }
1197                         yp = winy + font->ascent;
1198                 }
1199
1200                 /* Lookup character index with default font. */
1201                 glyphidx = XftCharIndex(xw.dpy, font->match, rune);
1202                 if (glyphidx) {
1203                         specs[numspecs].font = font->match;
1204                         specs[numspecs].glyph = glyphidx;
1205                         specs[numspecs].x = (short)xp;
1206                         specs[numspecs].y = (short)yp;
1207                         xp += runewidth;
1208                         numspecs++;
1209                         continue;
1210                 }
1211
1212                 /* Fallback on font cache, search the font cache for match. */
1213                 for (f = 0; f < frclen; f++) {
1214                         glyphidx = XftCharIndex(xw.dpy, frc[f].font, rune);
1215                         /* Everything correct. */
1216                         if (glyphidx && frc[f].flags == frcflags)
1217                                 break;
1218                         /* We got a default font for a not found glyph. */
1219                         if (!glyphidx && frc[f].flags == frcflags
1220                                         && frc[f].unicodep == rune) {
1221                                 break;
1222                         }
1223                 }
1224
1225                 /* Nothing was found. Use fontconfig to find matching font. */
1226                 if (f >= frclen) {
1227                         if (!font->set)
1228                                 font->set = FcFontSort(0, font->pattern,
1229                                                        1, 0, &fcres);
1230                         fcsets[0] = font->set;
1231
1232                         /*
1233                          * Nothing was found in the cache. Now use
1234                          * some dozen of Fontconfig calls to get the
1235                          * font for one single character.
1236                          *
1237                          * Xft and fontconfig are design failures.
1238                          */
1239                         fcpattern = FcPatternDuplicate(font->pattern);
1240                         fccharset = FcCharSetCreate();
1241
1242                         FcCharSetAddChar(fccharset, rune);
1243                         FcPatternAddCharSet(fcpattern, FC_CHARSET,
1244                                         fccharset);
1245                         FcPatternAddBool(fcpattern, FC_SCALABLE, 1);
1246
1247                         FcConfigSubstitute(0, fcpattern,
1248                                         FcMatchPattern);
1249                         FcDefaultSubstitute(fcpattern);
1250
1251                         fontpattern = FcFontSetMatch(0, fcsets, 1,
1252                                         fcpattern, &fcres);
1253
1254                         /* Allocate memory for the new cache entry. */
1255                         if (frclen >= frccap) {
1256                                 frccap += 16;
1257                                 frc = xrealloc(frc, frccap * sizeof(Fontcache));
1258                         }
1259
1260                         frc[frclen].font = XftFontOpenPattern(xw.dpy,
1261                                         fontpattern);
1262                         if (!frc[frclen].font)
1263                                 die("XftFontOpenPattern failed seeking fallback font: %s\n",
1264                                         strerror(errno));
1265                         frc[frclen].flags = frcflags;
1266                         frc[frclen].unicodep = rune;
1267
1268                         glyphidx = XftCharIndex(xw.dpy, frc[frclen].font, rune);
1269
1270                         f = frclen;
1271                         frclen++;
1272
1273                         FcPatternDestroy(fcpattern);
1274                         FcCharSetDestroy(fccharset);
1275                 }
1276
1277                 specs[numspecs].font = frc[f].font;
1278                 specs[numspecs].glyph = glyphidx;
1279                 specs[numspecs].x = (short)xp;
1280                 specs[numspecs].y = (short)yp;
1281                 xp += runewidth;
1282                 numspecs++;
1283         }
1284
1285         return numspecs;
1286 }
1287
1288 void
1289 xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, int y)
1290 {
1291         int charlen = len * ((base.mode & ATTR_WIDE) ? 2 : 1);
1292         int winx = borderpx + x * win.cw, winy = borderpx + y * win.ch,
1293             width = charlen * win.cw;
1294         Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
1295         XRenderColor colfg, colbg;
1296         XRectangle r;
1297
1298         /* Fallback on color display for attributes not supported by the font */
1299         if (base.mode & ATTR_ITALIC && base.mode & ATTR_BOLD) {
1300                 if (dc.ibfont.badslant || dc.ibfont.badweight)
1301                         base.fg = defaultattr;
1302         } else if ((base.mode & ATTR_ITALIC && dc.ifont.badslant) ||
1303             (base.mode & ATTR_BOLD && dc.bfont.badweight)) {
1304                 base.fg = defaultattr;
1305         }
1306
1307         if (IS_TRUECOL(base.fg)) {
1308                 colfg.alpha = 0xffff;
1309                 colfg.red = TRUERED(base.fg);
1310                 colfg.green = TRUEGREEN(base.fg);
1311                 colfg.blue = TRUEBLUE(base.fg);
1312                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
1313                 fg = &truefg;
1314         } else {
1315                 fg = &dc.col[base.fg];
1316         }
1317
1318         if (IS_TRUECOL(base.bg)) {
1319                 colbg.alpha = 0xffff;
1320                 colbg.green = TRUEGREEN(base.bg);
1321                 colbg.red = TRUERED(base.bg);
1322                 colbg.blue = TRUEBLUE(base.bg);
1323                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
1324                 bg = &truebg;
1325         } else {
1326                 bg = &dc.col[base.bg];
1327         }
1328
1329         /* Change basic system colors [0-7] to bright system colors [8-15] */
1330         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_BOLD && BETWEEN(base.fg, 0, 7))
1331                 fg = &dc.col[base.fg + 8];
1332
1333         if (IS_SET(MODE_REVERSE)) {
1334                 if (fg == &dc.col[defaultfg]) {
1335                         fg = &dc.col[defaultbg];
1336                 } else {
1337                         colfg.red = ~fg->color.red;
1338                         colfg.green = ~fg->color.green;
1339                         colfg.blue = ~fg->color.blue;
1340                         colfg.alpha = fg->color.alpha;
1341                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
1342                                         &revfg);
1343                         fg = &revfg;
1344                 }
1345
1346                 if (bg == &dc.col[defaultbg]) {
1347                         bg = &dc.col[defaultfg];
1348                 } else {
1349                         colbg.red = ~bg->color.red;
1350                         colbg.green = ~bg->color.green;
1351                         colbg.blue = ~bg->color.blue;
1352                         colbg.alpha = bg->color.alpha;
1353                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
1354                                         &revbg);
1355                         bg = &revbg;
1356                 }
1357         }
1358
1359         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_FAINT) {
1360                 colfg.red = fg->color.red / 2;
1361                 colfg.green = fg->color.green / 2;
1362                 colfg.blue = fg->color.blue / 2;
1363                 colfg.alpha = fg->color.alpha;
1364                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
1365                 fg = &revfg;
1366         }
1367
1368         if (base.mode & ATTR_REVERSE) {
1369                 temp = fg;
1370                 fg = bg;
1371                 bg = temp;
1372         }
1373
1374         if (base.mode & ATTR_BLINK && win.mode & MODE_BLINK)
1375                 fg = bg;
1376
1377         if (base.mode & ATTR_INVISIBLE)
1378                 fg = bg;
1379
1380         /* Intelligent cleaning up of the borders. */
1381         if (x == 0) {
1382                 xclear(0, (y == 0)? 0 : winy, borderpx,
1383                         winy + win.ch +
1384                         ((winy + win.ch >= borderpx + win.th)? win.h : 0));
1385         }
1386         if (winx + width >= borderpx + win.tw) {
1387                 xclear(winx + width, (y == 0)? 0 : winy, win.w,
1388                         ((winy + win.ch >= borderpx + win.th)? win.h : (winy + win.ch)));
1389         }
1390         if (y == 0)
1391                 xclear(winx, 0, winx + width, borderpx);
1392         if (winy + win.ch >= borderpx + win.th)
1393                 xclear(winx, winy + win.ch, winx + width, win.h);
1394
1395         /* Clean up the region we want to draw to. */
1396         XftDrawRect(xw.draw, bg, winx, winy, width, win.ch);
1397
1398         /* Set the clip region because Xft is sometimes dirty. */
1399         r.x = 0;
1400         r.y = 0;
1401         r.height = win.ch;
1402         r.width = width;
1403         XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
1404
1405         /* Render the glyphs. */
1406         XftDrawGlyphFontSpec(xw.draw, fg, specs, len);
1407
1408         /* Render underline and strikethrough. */
1409         if (base.mode & ATTR_UNDERLINE) {
1410                 XftDrawRect(xw.draw, fg, winx, winy + dc.font.ascent + 1,
1411                                 width, 1);
1412         }
1413
1414         if (base.mode & ATTR_STRUCK) {
1415                 XftDrawRect(xw.draw, fg, winx, winy + 2 * dc.font.ascent / 3,
1416                                 width, 1);
1417         }
1418
1419         /* Reset clip to none. */
1420         XftDrawSetClip(xw.draw, 0);
1421 }
1422
1423 void
1424 xdrawglyph(Glyph g, int x, int y)
1425 {
1426         int numspecs;
1427         XftGlyphFontSpec spec;
1428
1429         numspecs = xmakeglyphfontspecs(&spec, &g, 1, x, y);
1430         xdrawglyphfontspecs(&spec, g, numspecs, x, y);
1431 }
1432
1433 void
1434 xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og)
1435 {
1436         Color drawcol;
1437
1438         /* remove the old cursor */
1439         if (selected(ox, oy))
1440                 og.mode ^= ATTR_REVERSE;
1441         xdrawglyph(og, ox, oy);
1442
1443         if (IS_SET(MODE_HIDE))
1444                 return;
1445
1446         /*
1447          * Select the right color for the right mode.
1448          */
1449         g.mode &= ATTR_BOLD|ATTR_ITALIC|ATTR_UNDERLINE|ATTR_STRUCK|ATTR_WIDE;
1450
1451         if (IS_SET(MODE_REVERSE)) {
1452                 g.mode |= ATTR_REVERSE;
1453                 g.bg = defaultfg;
1454                 if (selected(cx, cy)) {
1455                         drawcol = dc.col[defaultcs];
1456                         g.fg = defaultrcs;
1457                 } else {
1458                         drawcol = dc.col[defaultrcs];
1459                         g.fg = defaultcs;
1460                 }
1461         } else {
1462                 if (selected(cx, cy)) {
1463                         g.fg = defaultfg;
1464                         g.bg = defaultrcs;
1465                 } else {
1466                         g.fg = defaultbg;
1467                         g.bg = defaultcs;
1468                 }
1469                 drawcol = dc.col[g.bg];
1470         }
1471
1472         /* draw the new one */
1473         if (IS_SET(MODE_FOCUSED)) {
1474                 switch (win.cursor) {
1475                 case 7: /* st extension: snowman (U+2603) */
1476                         g.u = 0x2603;
1477                 case 0: /* Blinking Block */
1478                 case 1: /* Blinking Block (Default) */
1479                 case 2: /* Steady Block */
1480                         xdrawglyph(g, cx, cy);
1481                         break;
1482                 case 3: /* Blinking Underline */
1483                 case 4: /* Steady Underline */
1484                         XftDrawRect(xw.draw, &drawcol,
1485                                         borderpx + cx * win.cw,
1486                                         borderpx + (cy + 1) * win.ch - \
1487                                                 cursorthickness,
1488                                         win.cw, cursorthickness);
1489                         break;
1490                 case 5: /* Blinking bar */
1491                 case 6: /* Steady bar */
1492                         XftDrawRect(xw.draw, &drawcol,
1493                                         borderpx + cx * win.cw,
1494                                         borderpx + cy * win.ch,
1495                                         cursorthickness, win.ch);
1496                         break;
1497                 }
1498         } else {
1499                 XftDrawRect(xw.draw, &drawcol,
1500                                 borderpx + cx * win.cw,
1501                                 borderpx + cy * win.ch,
1502                                 win.cw - 1, 1);
1503                 XftDrawRect(xw.draw, &drawcol,
1504                                 borderpx + cx * win.cw,
1505                                 borderpx + cy * win.ch,
1506                                 1, win.ch - 1);
1507                 XftDrawRect(xw.draw, &drawcol,
1508                                 borderpx + (cx + 1) * win.cw - 1,
1509                                 borderpx + cy * win.ch,
1510                                 1, win.ch - 1);
1511                 XftDrawRect(xw.draw, &drawcol,
1512                                 borderpx + cx * win.cw,
1513                                 borderpx + (cy + 1) * win.ch - 1,
1514                                 win.cw, 1);
1515         }
1516 }
1517
1518 void
1519 xsetenv(void)
1520 {
1521         char buf[sizeof(long) * 8 + 1];
1522
1523         snprintf(buf, sizeof(buf), "%lu", xw.win);
1524         setenv("WINDOWID", buf, 1);
1525 }
1526
1527 void
1528 xsettitle(char *p)
1529 {
1530         XTextProperty prop;
1531         DEFAULT(p, opt_title);
1532
1533         Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
1534                         &prop);
1535         XSetWMName(xw.dpy, xw.win, &prop);
1536         XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
1537         XFree(prop.value);
1538 }
1539
1540 int
1541 xstartdraw(void)
1542 {
1543         return IS_SET(MODE_VISIBLE);
1544 }
1545
1546 void
1547 xdrawline(Line line, int x1, int y1, int x2)
1548 {
1549         int i, x, ox, numspecs;
1550         Glyph base, new;
1551         XftGlyphFontSpec *specs = xw.specbuf;
1552
1553         numspecs = xmakeglyphfontspecs(specs, &line[x1], x2 - x1, x1, y1);
1554         i = ox = 0;
1555         for (x = x1; x < x2 && i < numspecs; x++) {
1556                 new = line[x];
1557                 if (new.mode == ATTR_WDUMMY)
1558                         continue;
1559                 if (selected(x, y1))
1560                         new.mode ^= ATTR_REVERSE;
1561                 if (i > 0 && ATTRCMP(base, new)) {
1562                         xdrawglyphfontspecs(specs, base, i, ox, y1);
1563                         specs += i;
1564                         numspecs -= i;
1565                         i = 0;
1566                 }
1567                 if (i == 0) {
1568                         ox = x;
1569                         base = new;
1570                 }
1571                 i++;
1572         }
1573         if (i > 0)
1574                 xdrawglyphfontspecs(specs, base, i, ox, y1);
1575 }
1576
1577 void
1578 xfinishdraw(void)
1579 {
1580         XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, win.w,
1581                         win.h, 0, 0);
1582         XSetForeground(xw.dpy, dc.gc,
1583                         dc.col[IS_SET(MODE_REVERSE)?
1584                                 defaultfg : defaultbg].pixel);
1585 }
1586
1587 void
1588 xximspot(int x, int y)
1589 {
1590         XPoint spot = { borderpx + x * win.cw, borderpx + (y + 1) * win.ch };
1591         XVaNestedList attr = XVaCreateNestedList(0, XNSpotLocation, &spot, NULL);
1592
1593         XSetICValues(xw.xic, XNPreeditAttributes, attr, NULL);
1594         XFree(attr);
1595 }
1596
1597 void
1598 expose(XEvent *ev)
1599 {
1600         redraw();
1601 }
1602
1603 void
1604 visibility(XEvent *ev)
1605 {
1606         XVisibilityEvent *e = &ev->xvisibility;
1607
1608         MODBIT(win.mode, e->state != VisibilityFullyObscured, MODE_VISIBLE);
1609 }
1610
1611 void
1612 unmap(XEvent *ev)
1613 {
1614         win.mode &= ~MODE_VISIBLE;
1615 }
1616
1617 void
1618 xsetpointermotion(int set)
1619 {
1620         MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
1621         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
1622 }
1623
1624 void
1625 xsetmode(int set, unsigned int flags)
1626 {
1627         int mode = win.mode;
1628         MODBIT(win.mode, set, flags);
1629         if ((win.mode & MODE_REVERSE) != (mode & MODE_REVERSE))
1630                 redraw();
1631 }
1632
1633 int
1634 xsetcursor(int cursor)
1635 {
1636         DEFAULT(cursor, 1);
1637         if (!BETWEEN(cursor, 0, 6))
1638                 return 1;
1639         win.cursor = cursor;
1640         return 0;
1641 }
1642
1643 void
1644 xseturgency(int add)
1645 {
1646         XWMHints *h = XGetWMHints(xw.dpy, xw.win);
1647
1648         MODBIT(h->flags, add, XUrgencyHint);
1649         XSetWMHints(xw.dpy, xw.win, h);
1650         XFree(h);
1651 }
1652
1653 void
1654 xbell(void)
1655 {
1656         if (!(IS_SET(MODE_FOCUSED)))
1657                 xseturgency(1);
1658         if (bellvolume)
1659                 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
1660 }
1661
1662 void
1663 focus(XEvent *ev)
1664 {
1665         XFocusChangeEvent *e = &ev->xfocus;
1666
1667         if (e->mode == NotifyGrab)
1668                 return;
1669
1670         if (ev->type == FocusIn) {
1671                 XSetICFocus(xw.xic);
1672                 win.mode |= MODE_FOCUSED;
1673                 xseturgency(0);
1674                 if (IS_SET(MODE_FOCUS))
1675                         ttywrite("\033[I", 3, 0);
1676         } else {
1677                 XUnsetICFocus(xw.xic);
1678                 win.mode &= ~MODE_FOCUSED;
1679                 if (IS_SET(MODE_FOCUS))
1680                         ttywrite("\033[O", 3, 0);
1681         }
1682 }
1683
1684 int
1685 match(uint mask, uint state)
1686 {
1687         return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
1688 }
1689
1690 char*
1691 kmap(KeySym k, uint state)
1692 {
1693         Key *kp;
1694         int i;
1695
1696         /* Check for mapped keys out of X11 function keys. */
1697         for (i = 0; i < LEN(mappedkeys); i++) {
1698                 if (mappedkeys[i] == k)
1699                         break;
1700         }
1701         if (i == LEN(mappedkeys)) {
1702                 if ((k & 0xFFFF) < 0xFD00)
1703                         return NULL;
1704         }
1705
1706         for (kp = key; kp < key + LEN(key); kp++) {
1707                 if (kp->k != k)
1708                         continue;
1709
1710                 if (!match(kp->mask, state))
1711                         continue;
1712
1713                 if (IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
1714                         continue;
1715                 if (IS_SET(MODE_NUMLOCK) && kp->appkey == 2)
1716                         continue;
1717
1718                 if (IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
1719                         continue;
1720
1721                 return kp->s;
1722         }
1723
1724         return NULL;
1725 }
1726
1727 void
1728 kpress(XEvent *ev)
1729 {
1730         XKeyEvent *e = &ev->xkey;
1731         KeySym ksym;
1732         char buf[32], *customkey;
1733         int len;
1734         Rune c;
1735         Status status;
1736         Shortcut *bp;
1737
1738         if (IS_SET(MODE_KBDLOCK))
1739                 return;
1740
1741         len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
1742         /* 1. shortcuts */
1743         for (bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
1744                 if (ksym == bp->keysym && match(bp->mod, e->state)) {
1745                         bp->func(&(bp->arg));
1746                         return;
1747                 }
1748         }
1749
1750         /* 2. custom keys from config.h */
1751         if ((customkey = kmap(ksym, e->state))) {
1752                 ttywrite(customkey, strlen(customkey), 1);
1753                 return;
1754         }
1755
1756         /* 3. composed string from input method */
1757         if (len == 0)
1758                 return;
1759         if (len == 1 && e->state & Mod1Mask) {
1760                 if (IS_SET(MODE_8BIT)) {
1761                         if (*buf < 0177) {
1762                                 c = *buf | 0x80;
1763                                 len = utf8encode(c, buf);
1764                         }
1765                 } else {
1766                         buf[1] = buf[0];
1767                         buf[0] = '\033';
1768                         len = 2;
1769                 }
1770         }
1771         ttywrite(buf, len, 1);
1772 }
1773
1774 void
1775 cmessage(XEvent *e)
1776 {
1777         /*
1778          * See xembed specs
1779          *  http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
1780          */
1781         if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
1782                 if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
1783                         win.mode |= MODE_FOCUSED;
1784                         xseturgency(0);
1785                 } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
1786                         win.mode &= ~MODE_FOCUSED;
1787                 }
1788         } else if (e->xclient.data.l[0] == xw.wmdeletewin) {
1789                 ttyhangup();
1790                 exit(0);
1791         }
1792 }
1793
1794 void
1795 resize(XEvent *e)
1796 {
1797         if (e->xconfigure.width == win.w && e->xconfigure.height == win.h)
1798                 return;
1799
1800         cresize(e->xconfigure.width, e->xconfigure.height);
1801 }
1802
1803 void
1804 run(void)
1805 {
1806         XEvent ev;
1807         int w = win.w, h = win.h;
1808         fd_set rfd;
1809         int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
1810         int ttyfd;
1811         struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
1812         long deltatime;
1813
1814         /* Waiting for window mapping */
1815         do {
1816                 XNextEvent(xw.dpy, &ev);
1817                 /*
1818                  * This XFilterEvent call is required because of XOpenIM. It
1819                  * does filter out the key event and some client message for
1820                  * the input method too.
1821                  */
1822                 if (XFilterEvent(&ev, None))
1823                         continue;
1824                 if (ev.type == ConfigureNotify) {
1825                         w = ev.xconfigure.width;
1826                         h = ev.xconfigure.height;
1827                 }
1828         } while (ev.type != MapNotify);
1829
1830         ttyfd = ttynew(opt_line, shell, opt_io, opt_cmd);
1831         cresize(w, h);
1832
1833         clock_gettime(CLOCK_MONOTONIC, &last);
1834         lastblink = last;
1835
1836         for (xev = actionfps;;) {
1837                 FD_ZERO(&rfd);
1838                 FD_SET(ttyfd, &rfd);
1839                 FD_SET(xfd, &rfd);
1840
1841                 if (pselect(MAX(xfd, ttyfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
1842                         if (errno == EINTR)
1843                                 continue;
1844                         die("select failed: %s\n", strerror(errno));
1845                 }
1846                 if (FD_ISSET(ttyfd, &rfd)) {
1847                         ttyread();
1848                         if (blinktimeout) {
1849                                 blinkset = tattrset(ATTR_BLINK);
1850                                 if (!blinkset)
1851                                         MODBIT(win.mode, 0, MODE_BLINK);
1852                         }
1853                 }
1854
1855                 if (FD_ISSET(xfd, &rfd))
1856                         xev = actionfps;
1857
1858                 clock_gettime(CLOCK_MONOTONIC, &now);
1859                 drawtimeout.tv_sec = 0;
1860                 drawtimeout.tv_nsec =  (1000 * 1E6)/ xfps;
1861                 tv = &drawtimeout;
1862
1863                 dodraw = 0;
1864                 if (blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
1865                         tsetdirtattr(ATTR_BLINK);
1866                         win.mode ^= MODE_BLINK;
1867                         lastblink = now;
1868                         dodraw = 1;
1869                 }
1870                 deltatime = TIMEDIFF(now, last);
1871                 if (deltatime > 1000 / (xev ? xfps : actionfps)) {
1872                         dodraw = 1;
1873                         last = now;
1874                 }
1875
1876                 if (dodraw) {
1877                         while (XPending(xw.dpy)) {
1878                                 XNextEvent(xw.dpy, &ev);
1879                                 if (XFilterEvent(&ev, None))
1880                                         continue;
1881                                 if (handler[ev.type])
1882                                         (handler[ev.type])(&ev);
1883                         }
1884
1885                         draw();
1886                         XFlush(xw.dpy);
1887
1888                         if (xev && !FD_ISSET(xfd, &rfd))
1889                                 xev--;
1890                         if (!FD_ISSET(ttyfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
1891                                 if (blinkset) {
1892                                         if (TIMEDIFF(now, lastblink) \
1893                                                         > blinktimeout) {
1894                                                 drawtimeout.tv_nsec = 1000;
1895                                         } else {
1896                                                 drawtimeout.tv_nsec = (1E6 * \
1897                                                         (blinktimeout - \
1898                                                         TIMEDIFF(now,
1899                                                                 lastblink)));
1900                                         }
1901                                         drawtimeout.tv_sec = \
1902                                             drawtimeout.tv_nsec / 1E9;
1903                                         drawtimeout.tv_nsec %= (long)1E9;
1904                                 } else {
1905                                         tv = NULL;
1906                                 }
1907                         }
1908                 }
1909         }
1910 }
1911
1912 void
1913 usage(void)
1914 {
1915         die("usage: %s [-aiv] [-c class] [-f font] [-g geometry]"
1916             " [-n name] [-o file]\n"
1917             "          [-T title] [-t title] [-w windowid]"
1918             " [[-e] command [args ...]]\n"
1919             "       %s [-aiv] [-c class] [-f font] [-g geometry]"
1920             " [-n name] [-o file]\n"
1921             "          [-T title] [-t title] [-w windowid] -l line"
1922             " [stty_args ...]\n", argv0, argv0);
1923 }
1924
1925 int
1926 main(int argc, char *argv[])
1927 {
1928         xw.l = xw.t = 0;
1929         xw.isfixed = False;
1930         win.cursor = cursorshape;
1931
1932         ARGBEGIN {
1933         case 'a':
1934                 allowaltscreen = 0;
1935                 break;
1936         case 'c':
1937                 opt_class = EARGF(usage());
1938                 break;
1939         case 'e':
1940                 if (argc > 0)
1941                         --argc, ++argv;
1942                 goto run;
1943         case 'f':
1944                 opt_font = EARGF(usage());
1945                 break;
1946         case 'g':
1947                 xw.gm = XParseGeometry(EARGF(usage()),
1948                                 &xw.l, &xw.t, &cols, &rows);
1949                 break;
1950         case 'i':
1951                 xw.isfixed = 1;
1952                 break;
1953         case 'o':
1954                 opt_io = EARGF(usage());
1955                 break;
1956         case 'l':
1957                 opt_line = EARGF(usage());
1958                 break;
1959         case 'n':
1960                 opt_name = EARGF(usage());
1961                 break;
1962         case 't':
1963         case 'T':
1964                 opt_title = EARGF(usage());
1965                 break;
1966         case 'w':
1967                 opt_embed = EARGF(usage());
1968                 break;
1969         case 'v':
1970                 die("%s " VERSION "\n", argv0);
1971                 break;
1972         default:
1973                 usage();
1974         } ARGEND;
1975
1976 run:
1977         if (argc > 0) /* eat all remaining arguments */
1978                 opt_cmd = argv;
1979
1980         if (!opt_title)
1981                 opt_title = (opt_line || !opt_cmd) ? "st" : opt_cmd[0];
1982
1983         setlocale(LC_CTYPE, "");
1984         XSetLocaleModifiers("");
1985         cols = MAX(cols, 1);
1986         rows = MAX(rows, 1);
1987         tnew(cols, rows);
1988         xinit(cols, rows);
1989         xsetenv();
1990         selinit();
1991         run();
1992
1993         return 0;
1994 }