x.c

   1 /* See LICENSE for license details. */
   2 #include <errno.h>
   3 #include <locale.h>
   4 #include <signal.h>
   5 #include <stdint.h>
   6 #include <sys/select.h>
   7 #include <time.h>
   8 #include <unistd.h>
   9 #include <libgen.h>
  10 #include <X11/Xatom.h>
  11 #include <X11/Xlib.h>
  12 #include <X11/Xutil.h>
  13 #include <X11/cursorfont.h>
  14 #include <X11/keysym.h>
  15 #include <X11/Xft/Xft.h>
  16 #include <X11/XKBlib.h>
  17
  18 static char *argv0;
  19 #include "arg.h"
  20 #include "st.h"
  21 #include "win.h"
  22
  23 /* types used in config.h */
  24 typedef struct {
  25         uint mod;
  26         KeySym keysym;
  27         void (*func)(const Arg *);
  28         const Arg arg;
  29 } Shortcut;
  30
  31 typedef struct {
  32         uint b;
  33         uint mask;
  34         char *s;
  35 } MouseShortcut;
  36
  37 typedef struct {
  38         KeySym k;
  39         uint mask;
  40         char *s;
  41         /* three valued logic variables: 0 indifferent, 1 on, -1 off */
  42         signed char appkey;    /* application keypad */
  43         signed char appcursor; /* application cursor */
  44         signed char crlf;      /* crlf mode          */
  45 } Key;
  46
  47 /* X modifiers */
  48 #define XK_ANY_MOD    UINT_MAX
  49 #define XK_NO_MOD     0
  50 #define XK_SWITCH_MOD (1<<13)
  51
  52 /* function definitions used in config.h */
  53 static void clipcopy(const Arg *);
  54 static void clippaste(const Arg *);
  55 static void selpaste(const Arg *);
  56 static void zoom(const Arg *);
  57 static void zoomabs(const Arg *);
  58 static void zoomreset(const Arg *);
  59
  60 /* config.h for applying patches and the configuration. */
  61 #include "config.h"
  62
  63 /* XEMBED messages */
  64 #define XEMBED_FOCUS_IN  4
  65 #define XEMBED_FOCUS_OUT 5
  66
  67 /* macros */
  68 #define TRUERED(x)              (((x) & 0xff0000) >> 8)
  69 #define TRUEGREEN(x)            (((x) & 0xff00))
  70 #define TRUEBLUE(x)             (((x) & 0xff) << 8)
  71
  72 typedef XftDraw *Draw;
  73 typedef XftColor Color;
  74 typedef XftGlyphFontSpec GlyphFontSpec;
  75
  76 /* Purely graphic info */
  77 typedef struct {
  78         Display *dpy;
  79         Colormap cmap;
  80         Window win;
  81         Drawable buf;
  82         GlyphFontSpec *specbuf; /* font spec buffer used for rendering */
  83         Atom xembed, wmdeletewin, netwmname, netwmpid;
  84         XIM xim;
  85         XIC xic;
  86         Draw draw;
  87         Visual *vis;
  88         XSetWindowAttributes attrs;
  89         int scr;
  90         int isfixed; /* is fixed geometry? */
  91         int l, t; /* left and top offset */
  92         int gm; /* geometry mask */
  93 } XWindow;
  94
  95 typedef struct {
  96         Atom xtarget;
  97         char *primary, *clipboard;
  98         struct timespec tclick1;
  99         struct timespec tclick2;
 100 } XSelection;
 101
 102 /* Font structure */
 103 #define Font Font_
 104 typedef struct {
 105         int height;
 106         int width;
 107         int ascent;
 108         int descent;
 109         int badslant;
 110         int badweight;
 111         short lbearing;
 112         short rbearing;
 113         XftFont *match;
 114         FcFontSet *set;
 115         FcPattern *pattern;
 116 } Font;
 117
 118 /* Drawing Context */
 119 typedef struct {
 120         Color *col;
 121         size_t collen;
 122         Font font, bfont, ifont, ibfont;
 123         GC gc;
 124 } DC;
 125
 126 static inline ushort sixd_to_16bit(int);
 127 static int xmakeglyphfontspecs(XftGlyphFontSpec *, const Glyph *, int, int, int);
 128 static void xdrawglyphfontspecs(const XftGlyphFontSpec *, Glyph, int, int, int);
 129 static void xdrawglyph(Glyph, int, int);
 130 static void xclear(int, int, int, int);
 131 static void xdrawcursor(void);
 132 static int xgeommasktogravity(int);
 133 static void xinit(void);
 134 static void cresize(int, int);
 135 static void xresize(int, int);
 136 static int xloadfont(Font *, FcPattern *);
 137 static void xloadfonts(char *, double);
 138 static void xunloadfont(Font *);
 139 static void xunloadfonts(void);
 140 static void xsetenv(void);
 141 static void xseturgency(int);
 142 static int x2col(int);
 143 static int y2row(int);
 144
 145 static void expose(XEvent *);
 146 static void visibility(XEvent *);
 147 static void unmap(XEvent *);
 148 static void kpress(XEvent *);
 149 static void cmessage(XEvent *);
 150 static void resize(XEvent *);
 151 static void focus(XEvent *);
 152 static void brelease(XEvent *);
 153 static void bpress(XEvent *);
 154 static void bmotion(XEvent *);
 155 static void propnotify(XEvent *);
 156 static void selnotify(XEvent *);
 157 static void selclear_(XEvent *);
 158 static void selrequest(XEvent *);
 159 static void setsel(char *, Time);
 160 static void mousesel(XEvent *, int);
 161 static void mousereport(XEvent *);
 162 static char *kmap(KeySym, uint);
 163 static int match(uint, uint);
 164
 165 static void run(void);
 166 static void usage(void);
 167
 168 static void (*handler[LASTEvent])(XEvent *) = {
 169         [KeyPress] = kpress,
 170         [ClientMessage] = cmessage,
 171         [ConfigureNotify] = resize,
 172         [VisibilityNotify] = visibility,
 173         [UnmapNotify] = unmap,
 174         [Expose] = expose,
 175         [FocusIn] = focus,
 176         [FocusOut] = focus,
 177         [MotionNotify] = bmotion,
 178         [ButtonPress] = bpress,
 179         [ButtonRelease] = brelease,
 180 /*
 181  * Uncomment if you want the selection to disappear when you select something
 182  * different in another window.
 183  */
 184 /*      [SelectionClear] = selclear_, */
 185         [SelectionNotify] = selnotify,
 186 /*
 187  * PropertyNotify is only turned on when there is some INCR transfer happening
 188  * for the selection retrieval.
 189  */
 190         [PropertyNotify] = propnotify,
 191         [SelectionRequest] = selrequest,
 192 };
 193
 194 /* Globals */
 195 static DC dc;
 196 static XWindow xw;
 197 static XSelection xsel;
 198 static TermWindow win;
 199
 200 enum window_state {
 201         WIN_VISIBLE = 1,
 202         WIN_FOCUSED = 2
 203 };
 204
 205 /* Font Ring Cache */
 206 enum {
 207         FRC_NORMAL,
 208         FRC_ITALIC,
 209         FRC_BOLD,
 210         FRC_ITALICBOLD
 211 };
 212
 213 typedef struct {
 214         XftFont *font;
 215         int flags;
 216         Rune unicodep;
 217 } Fontcache;
 218
 219 /* Fontcache is an array now. A new font will be appended to the array. */
 220 static Fontcache frc[16];
 221 static int frclen = 0;
 222 static char *usedfont = NULL;
 223 static double usedfontsize = 0;
 224 static double defaultfontsize = 0;
 225
 226 static char *opt_class = NULL;
 227 static char **opt_cmd  = NULL;
 228 static char *opt_embed = NULL;
 229 static char *opt_font  = NULL;
 230 static char *opt_io    = NULL;
 231 static char *opt_line  = NULL;
 232 static char *opt_name  = NULL;
 233 static char *opt_title = NULL;
 234
 235 void
 236 clipcopy(const Arg *dummy)
 237 {
 238         Atom clipboard;
 239
 240         if (xsel.clipboard != NULL)
 241                 free(xsel.clipboard);
 242
 243         if (xsel.primary != NULL) {
 244                 xsel.clipboard = xstrdup(xsel.primary);
 245                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 246                 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
 247         }
 248 }
 249
 250 void
 251 clippaste(const Arg *dummy)
 252 {
 253         Atom clipboard;
 254
 255         clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 256         XConvertSelection(xw.dpy, clipboard, xsel.xtarget, clipboard,
 257                         xw.win, CurrentTime);
 258 }
 259
 260 void
 261 selpaste(const Arg *dummy)
 262 {
 263         XConvertSelection(xw.dpy, XA_PRIMARY, xsel.xtarget, XA_PRIMARY,
 264                         xw.win, CurrentTime);
 265 }
 266
 267 void
 268 zoom(const Arg *arg)
 269 {
 270         Arg larg;
 271
 272         larg.f = usedfontsize + arg->f;
 273         zoomabs(&larg);
 274 }
 275
 276 void
 277 zoomabs(const Arg *arg)
 278 {
 279         xunloadfonts();
 280         xloadfonts(usedfont, arg->f);
 281         cresize(0, 0);
 282         redraw();
 283         xhints();
 284 }
 285
 286 void
 287 zoomreset(const Arg *arg)
 288 {
 289         Arg larg;
 290
 291         if (defaultfontsize > 0) {
 292                 larg.f = defaultfontsize;
 293                 zoomabs(&larg);
 294         }
 295 }
 296
 297 int
 298 x2col(int x)
 299 {
 300         x -= borderpx;
 301         x /= win.cw;
 302
 303         return LIMIT(x, 0, term.col-1);
 304 }
 305
 306 int
 307 y2row(int y)
 308 {
 309         y -= borderpx;
 310         y /= win.ch;
 311
 312         return LIMIT(y, 0, term.row-1);
 313 }
 314
 315 void
 316 mousesel(XEvent *e, int done)
 317 {
 318         int type, seltype = SEL_REGULAR;
 319         uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
 320
 321         for (type = 1; type < LEN(selmasks); ++type) {
 322                 if (match(selmasks[type], state)) {
 323                         seltype = type;
 324                         break;
 325                 }
 326         }
 327         selextend(x2col(e->xbutton.x), y2row(e->xbutton.y), seltype, done);
 328         if (done)
 329                 setsel(getsel(), e->xbutton.time);
 330 }
 331
 332 void
 333 mousereport(XEvent *e)
 334 {
 335         int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
 336             button = e->xbutton.button, state = e->xbutton.state,
 337             len;
 338         char buf[40];
 339         static int ox, oy;
 340
 341         /* from urxvt */
 342         if (e->xbutton.type == MotionNotify) {
 343                 if (x == ox && y == oy)
 344                         return;
 345                 if (!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
 346                         return;
 347                 /* MOUSE_MOTION: no reporting if no button is pressed */
 348                 if (IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
 349                         return;
 350
 351                 button = oldbutton + 32;
 352                 ox = x;
 353                 oy = y;
 354         } else {
 355                 if (!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
 356                         button = 3;
 357                 } else {
 358                         button -= Button1;
 359                         if (button >= 3)
 360                                 button += 64 - 3;
 361                 }
 362                 if (e->xbutton.type == ButtonPress) {
 363                         oldbutton = button;
 364                         ox = x;
 365                         oy = y;
 366                 } else if (e->xbutton.type == ButtonRelease) {
 367                         oldbutton = 3;
 368                         /* MODE_MOUSEX10: no button release reporting */
 369                         if (IS_SET(MODE_MOUSEX10))
 370                                 return;
 371                         if (button == 64 || button == 65)
 372                                 return;
 373                 }
 374         }
 375
 376         if (!IS_SET(MODE_MOUSEX10)) {
 377                 button += ((state & ShiftMask  ) ? 4  : 0)
 378                         + ((state & Mod4Mask   ) ? 8  : 0)
 379                         + ((state & ControlMask) ? 16 : 0);
 380         }
 381
 382         if (IS_SET(MODE_MOUSESGR)) {
 383                 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
 384                                 button, x+1, y+1,
 385                                 e->xbutton.type == ButtonRelease ? 'm' : 'M');
 386         } else if (x < 223 && y < 223) {
 387                 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
 388                                 32+button, 32+x+1, 32+y+1);
 389         } else {
 390                 return;
 391         }
 392
 393         ttywrite(buf, len);
 394 }
 395
 396 void
 397 bpress(XEvent *e)
 398 {
 399         struct timespec now;
 400         MouseShortcut *ms;
 401         int snap;
 402
 403         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 404                 mousereport(e);
 405                 return;
 406         }
 407
 408         for (ms = mshortcuts; ms < mshortcuts + LEN(mshortcuts); ms++) {
 409                 if (e->xbutton.button == ms->b
 410                                 && match(ms->mask, e->xbutton.state)) {
 411                         ttysend(ms->s, strlen(ms->s));
 412                         return;
 413                 }
 414         }
 415
 416         if (e->xbutton.button == Button1) {
 417                 /*
 418                  * If the user clicks below predefined timeouts specific
 419                  * snapping behaviour is exposed.
 420                  */
 421                 clock_gettime(CLOCK_MONOTONIC, &now);
 422                 if (TIMEDIFF(now, xsel.tclick2) <= tripleclicktimeout) {
 423                         snap = SNAP_LINE;
 424                 } else if (TIMEDIFF(now, xsel.tclick1) <= doubleclicktimeout) {
 425                         snap = SNAP_WORD;
 426                 } else {
 427                         snap = 0;
 428                 }
 429                 xsel.tclick2 = xsel.tclick1;
 430                 xsel.tclick1 = now;
 431
 432                 selstart(x2col(e->xbutton.x), y2row(e->xbutton.y), snap);
 433         }
 434 }
 435
 436 void
 437 propnotify(XEvent *e)
 438 {
 439         XPropertyEvent *xpev;
 440         Atom clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 441
 442         xpev = &e->xproperty;
 443         if (xpev->state == PropertyNewValue &&
 444                         (xpev->atom == XA_PRIMARY ||
 445                          xpev->atom == clipboard)) {
 446                 selnotify(e);
 447         }
 448 }
 449
 450 void
 451 selnotify(XEvent *e)
 452 {
 453         ulong nitems, ofs, rem;
 454         int format;
 455         uchar *data, *last, *repl;
 456         Atom type, incratom, property;
 457
 458         incratom = XInternAtom(xw.dpy, "INCR", 0);
 459
 460         ofs = 0;
 461         if (e->type == SelectionNotify) {
 462                 property = e->xselection.property;
 463         } else if(e->type == PropertyNotify) {
 464                 property = e->xproperty.atom;
 465         } else {
 466                 return;
 467         }
 468         if (property == None)
 469                 return;
 470
 471         do {
 472                 if (XGetWindowProperty(xw.dpy, xw.win, property, ofs,
 473                                         BUFSIZ/4, False, AnyPropertyType,
 474                                         &type, &format, &nitems, &rem,
 475                                         &data)) {
 476                         fprintf(stderr, "Clipboard allocation failed\n");
 477                         return;
 478                 }
 479
 480                 if (e->type == PropertyNotify && nitems == 0 && rem == 0) {
 481                         /*
 482                          * If there is some PropertyNotify with no data, then
 483                          * this is the signal of the selection owner that all
 484                          * data has been transferred. We won't need to receive
 485                          * PropertyNotify events anymore.
 486                          */
 487                         MODBIT(xw.attrs.event_mask, 0, PropertyChangeMask);
 488                         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
 489                                         &xw.attrs);
 490                 }
 491
 492                 if (type == incratom) {
 493                         /*
 494                          * Activate the PropertyNotify events so we receive
 495                          * when the selection owner does send us the next
 496                          * chunk of data.
 497                          */
 498                         MODBIT(xw.attrs.event_mask, 1, PropertyChangeMask);
 499                         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
 500                                         &xw.attrs);
 501
 502                         /*
 503                          * Deleting the property is the transfer start signal.
 504                          */
 505                         XDeleteProperty(xw.dpy, xw.win, (int)property);
 506                         continue;
 507                 }
 508
 509                 /*
 510                  * As seen in getsel:
 511                  * Line endings are inconsistent in the terminal and GUI world
 512                  * copy and pasting. When receiving some selection data,
 513                  * replace all '\n' with '\r'.
 514                  * FIXME: Fix the computer world.
 515                  */
 516                 repl = data;
 517                 last = data + nitems * format / 8;
 518                 while ((repl = memchr(repl, '\n', last - repl))) {
 519                         *repl++ = '\r';
 520                 }
 521
 522                 if (IS_SET(MODE_BRCKTPASTE) && ofs == 0)
 523                         ttywrite("\033[200~", 6);
 524                 ttysend((char *)data, nitems * format / 8);
 525                 if (IS_SET(MODE_BRCKTPASTE) && rem == 0)
 526                         ttywrite("\033[201~", 6);
 527                 XFree(data);
 528                 /* number of 32-bit chunks returned */
 529                 ofs += nitems * format / 32;
 530         } while (rem > 0);
 531
 532         /*
 533          * Deleting the property again tells the selection owner to send the
 534          * next data chunk in the property.
 535          */
 536         XDeleteProperty(xw.dpy, xw.win, (int)property);
 537 }
 538
 539 void
 540 xclipcopy(void)
 541 {
 542         clipcopy(NULL);
 543 }
 544
 545 void
 546 selclear_(XEvent *e)
 547 {
 548         selclear();
 549 }
 550
 551 void
 552 selrequest(XEvent *e)
 553 {
 554         XSelectionRequestEvent *xsre;
 555         XSelectionEvent xev;
 556         Atom xa_targets, string, clipboard;
 557         char *seltext;
 558
 559         xsre = (XSelectionRequestEvent *) e;
 560         xev.type = SelectionNotify;
 561         xev.requestor = xsre->requestor;
 562         xev.selection = xsre->selection;
 563         xev.target = xsre->target;
 564         xev.time = xsre->time;
 565         if (xsre->property == None)
 566                 xsre->property = xsre->target;
 567
 568         /* reject */
 569         xev.property = None;
 570
 571         xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
 572         if (xsre->target == xa_targets) {
 573                 /* respond with the supported type */
 574                 string = xsel.xtarget;
 575                 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
 576                                 XA_ATOM, 32, PropModeReplace,
 577                                 (uchar *) &string, 1);
 578                 xev.property = xsre->property;
 579         } else if (xsre->target == xsel.xtarget || xsre->target == XA_STRING) {
 580                 /*
 581                  * xith XA_STRING non ascii characters may be incorrect in the
 582                  * requestor. It is not our problem, use utf8.
 583                  */
 584                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 585                 if (xsre->selection == XA_PRIMARY) {
 586                         seltext = xsel.primary;
 587                 } else if (xsre->selection == clipboard) {
 588                         seltext = xsel.clipboard;
 589                 } else {
 590                         fprintf(stderr,
 591                                 "Unhandled clipboard selection 0x%lx\n",
 592                                 xsre->selection);
 593                         return;
 594                 }
 595                 if (seltext != NULL) {
 596                         XChangeProperty(xsre->display, xsre->requestor,
 597                                         xsre->property, xsre->target,
 598                                         8, PropModeReplace,
 599                                         (uchar *)seltext, strlen(seltext));
 600                         xev.property = xsre->property;
 601                 }
 602         }
 603
 604         /* all done, send a notification to the listener */
 605         if (!XSendEvent(xsre->display, xsre->requestor, 1, 0, (XEvent *) &xev))
 606                 fprintf(stderr, "Error sending SelectionNotify event\n");
 607 }
 608
 609 void
 610 setsel(char *str, Time t)
 611 {
 612         free(xsel.primary);
 613         xsel.primary = str;
 614
 615         XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
 616         if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
 617                 selclear_(NULL);
 618 }
 619
 620 void
 621 xsetsel(char *str)
 622 {
 623         setsel(str, CurrentTime);
 624 }
 625
 626 void
 627 brelease(XEvent *e)
 628 {
 629         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 630                 mousereport(e);
 631                 return;
 632         }
 633
 634         if (e->xbutton.button == Button2)
 635                 selpaste(NULL);
 636         else if (e->xbutton.button == Button1)
 637                 mousesel(e, 1);
 638 }
 639
 640 void
 641 bmotion(XEvent *e)
 642 {
 643         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 644                 mousereport(e);
 645                 return;
 646         }
 647
 648         mousesel(e, 0);
 649 }
 650
 651 void
 652 cresize(int width, int height)
 653 {
 654         int col, row;
 655
 656         if (width != 0)
 657                 win.w = width;
 658         if (height != 0)
 659                 win.h = height;
 660
 661         col = (win.w - 2 * borderpx) / win.cw;
 662         row = (win.h - 2 * borderpx) / win.ch;
 663
 664         tresize(col, row);
 665         xresize(col, row);
 666         ttyresize(win.tw, win.th);
 667 }
 668
 669 void
 670 xresize(int col, int row)
 671 {
 672         win.tw = MAX(1, col * win.cw);
 673         win.th = MAX(1, row * win.ch);
 674
 675         XFreePixmap(xw.dpy, xw.buf);
 676         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
 677                         DefaultDepth(xw.dpy, xw.scr));
 678         XftDrawChange(xw.draw, xw.buf);
 679         xclear(0, 0, win.w, win.h);
 680
 681         /* resize to new width */
 682         xw.specbuf = xrealloc(xw.specbuf, col * sizeof(GlyphFontSpec));
 683 }
 684
 685 ushort
 686 sixd_to_16bit(int x)
 687 {
 688         return x == 0 ? 0 : 0x3737 + 0x2828 * x;
 689 }
 690
 691 int
 692 xloadcolor(int i, const char *name, Color *ncolor)
 693 {
 694         XRenderColor color = { .alpha = 0xffff };
 695
 696         if (!name) {
 697                 if (BETWEEN(i, 16, 255)) { /* 256 color */
 698                         if (i < 6*6*6+16) { /* same colors as xterm */
 699                                 color.red   = sixd_to_16bit( ((i-16)/36)%6 );
 700                                 color.green = sixd_to_16bit( ((i-16)/6) %6 );
 701                                 color.blue  = sixd_to_16bit( ((i-16)/1) %6 );
 702                         } else { /* greyscale */
 703                                 color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
 704                                 color.green = color.blue = color.red;
 705                         }
 706                         return XftColorAllocValue(xw.dpy, xw.vis,
 707                                                   xw.cmap, &color, ncolor);
 708                 } else
 709                         name = colorname[i];
 710         }
 711
 712         return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
 713 }
 714
 715 void
 716 xloadcols(void)
 717 {
 718         int i;
 719         static int loaded;
 720         Color *cp;
 721
 722         dc.collen = MAX(LEN(colorname), 256);
 723         dc.col = xmalloc(dc.collen * sizeof(Color));
 724
 725         if (loaded) {
 726                 for (cp = dc.col; cp < &dc.col[dc.collen]; ++cp)
 727                         XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
 728         }
 729
 730         for (i = 0; i < dc.collen; i++)
 731                 if (!xloadcolor(i, NULL, &dc.col[i])) {
 732                         if (colorname[i])
 733                                 die("Could not allocate color '%s'\n", colorname[i]);
 734                         else
 735                                 die("Could not allocate color %d\n", i);
 736                 }
 737         loaded = 1;
 738 }
 739
 740 int
 741 xsetcolorname(int x, const char *name)
 742 {
 743         Color ncolor;
 744
 745         if (!BETWEEN(x, 0, dc.collen))
 746                 return 1;
 747
 748
 749         if (!xloadcolor(x, name, &ncolor))
 750                 return 1;
 751
 752         XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
 753         dc.col[x] = ncolor;
 754
 755         return 0;
 756 }
 757
 758 /*
 759  * Absolute coordinates.
 760  */
 761 void
 762 xclear(int x1, int y1, int x2, int y2)
 763 {
 764         XftDrawRect(xw.draw,
 765                         &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
 766                         x1, y1, x2-x1, y2-y1);
 767 }
 768
 769 void
 770 xhints(void)
 771 {
 772         XClassHint class = {opt_name ? opt_name : termname,
 773                             opt_class ? opt_class : termname};
 774         XWMHints wm = {.flags = InputHint, .input = 1};
 775         XSizeHints *sizeh = NULL;
 776
 777         sizeh = XAllocSizeHints();
 778
 779         sizeh->flags = PSize | PResizeInc | PBaseSize;
 780         sizeh->height = win.h;
 781         sizeh->width = win.w;
 782         sizeh->height_inc = win.ch;
 783         sizeh->width_inc = win.cw;
 784         sizeh->base_height = 2 * borderpx;
 785         sizeh->base_width = 2 * borderpx;
 786         if (xw.isfixed) {
 787                 sizeh->flags |= PMaxSize | PMinSize;
 788                 sizeh->min_width = sizeh->max_width = win.w;
 789                 sizeh->min_height = sizeh->max_height = win.h;
 790         }
 791         if (xw.gm & (XValue|YValue)) {
 792                 sizeh->flags |= USPosition | PWinGravity;
 793                 sizeh->x = xw.l;
 794                 sizeh->y = xw.t;
 795                 sizeh->win_gravity = xgeommasktogravity(xw.gm);
 796         }
 797
 798         XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
 799                         &class);
 800         XFree(sizeh);
 801 }
 802
 803 int
 804 xgeommasktogravity(int mask)
 805 {
 806         switch (mask & (XNegative|YNegative)) {
 807         case 0:
 808                 return NorthWestGravity;
 809         case XNegative:
 810                 return NorthEastGravity;
 811         case YNegative:
 812                 return SouthWestGravity;
 813         }
 814
 815         return SouthEastGravity;
 816 }
 817
 818 int
 819 xloadfont(Font *f, FcPattern *pattern)
 820 {
 821         FcPattern *configured;
 822         FcPattern *match;
 823         FcResult result;
 824         XGlyphInfo extents;
 825         int wantattr, haveattr;
 826
 827         /*
 828          * Manually configure instead of calling XftMatchFont
 829          * so that we can use the configured pattern for
 830          * "missing glyph" lookups.
 831          */
 832         configured = FcPatternDuplicate(pattern);
 833         if (!configured)
 834                 return 1;
 835
 836         FcConfigSubstitute(NULL, configured, FcMatchPattern);
 837         XftDefaultSubstitute(xw.dpy, xw.scr, configured);
 838
 839         match = FcFontMatch(NULL, configured, &result);
 840         if (!match) {
 841                 FcPatternDestroy(configured);
 842                 return 1;
 843         }
 844
 845         if (!(f->match = XftFontOpenPattern(xw.dpy, match))) {
 846                 FcPatternDestroy(configured);
 847                 FcPatternDestroy(match);
 848                 return 1;
 849         }
 850
 851         if ((XftPatternGetInteger(pattern, "slant", 0, &wantattr) ==
 852             XftResultMatch)) {
 853                 /*
 854                  * Check if xft was unable to find a font with the appropriate
 855                  * slant but gave us one anyway. Try to mitigate.
 856                  */
 857                 if ((XftPatternGetInteger(f->match->pattern, "slant", 0,
 858                     &haveattr) != XftResultMatch) || haveattr < wantattr) {
 859                         f->badslant = 1;
 860                         fputs("st: font slant does not match\n", stderr);
 861                 }
 862         }
 863
 864         if ((XftPatternGetInteger(pattern, "weight", 0, &wantattr) ==
 865             XftResultMatch)) {
 866                 if ((XftPatternGetInteger(f->match->pattern, "weight", 0,
 867                     &haveattr) != XftResultMatch) || haveattr != wantattr) {
 868                         f->badweight = 1;
 869                         fputs("st: font weight does not match\n", stderr);
 870                 }
 871         }
 872
 873         XftTextExtentsUtf8(xw.dpy, f->match,
 874                 (const FcChar8 *) ascii_printable,
 875                 strlen(ascii_printable), &extents);
 876
 877         f->set = NULL;
 878         f->pattern = configured;
 879
 880         f->ascent = f->match->ascent;
 881         f->descent = f->match->descent;
 882         f->lbearing = 0;
 883         f->rbearing = f->match->max_advance_width;
 884
 885         f->height = f->ascent + f->descent;
 886         f->width = DIVCEIL(extents.xOff, strlen(ascii_printable));
 887
 888         return 0;
 889 }
 890
 891 void
 892 xloadfonts(char *fontstr, double fontsize)
 893 {
 894         FcPattern *pattern;
 895         double fontval;
 896         float ceilf(float);
 897
 898         if (fontstr[0] == '-') {
 899                 pattern = XftXlfdParse(fontstr, False, False);
 900         } else {
 901                 pattern = FcNameParse((FcChar8 *)fontstr);
 902         }
 903
 904         if (!pattern)
 905                 die("st: can't open font %s\n", fontstr);
 906
 907         if (fontsize > 1) {
 908                 FcPatternDel(pattern, FC_PIXEL_SIZE);
 909                 FcPatternDel(pattern, FC_SIZE);
 910                 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
 911                 usedfontsize = fontsize;
 912         } else {
 913                 if (FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval) ==
 914                                 FcResultMatch) {
 915                         usedfontsize = fontval;
 916                 } else if (FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval) ==
 917                                 FcResultMatch) {
 918                         usedfontsize = -1;
 919                 } else {
 920                         /*
 921                          * Default font size is 12, if none given. This is to
 922                          * have a known usedfontsize value.
 923                          */
 924                         FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
 925                         usedfontsize = 12;
 926                 }
 927                 defaultfontsize = usedfontsize;
 928         }
 929
 930         if (xloadfont(&dc.font, pattern))
 931                 die("st: can't open font %s\n", fontstr);
 932
 933         if (usedfontsize < 0) {
 934                 FcPatternGetDouble(dc.font.match->pattern,
 935                                    FC_PIXEL_SIZE, 0, &fontval);
 936                 usedfontsize = fontval;
 937                 if (fontsize == 0)
 938                         defaultfontsize = fontval;
 939         }
 940
 941         /* Setting character width and height. */
 942         win.cw = ceilf(dc.font.width * cwscale);
 943         win.ch = ceilf(dc.font.height * chscale);
 944
 945         FcPatternDel(pattern, FC_SLANT);
 946         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
 947         if (xloadfont(&dc.ifont, pattern))
 948                 die("st: can't open font %s\n", fontstr);
 949
 950         FcPatternDel(pattern, FC_WEIGHT);
 951         FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
 952         if (xloadfont(&dc.ibfont, pattern))
 953                 die("st: can't open font %s\n", fontstr);
 954
 955         FcPatternDel(pattern, FC_SLANT);
 956         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
 957         if (xloadfont(&dc.bfont, pattern))
 958                 die("st: can't open font %s\n", fontstr);
 959
 960         FcPatternDestroy(pattern);
 961 }
 962
 963 void
 964 xunloadfont(Font *f)
 965 {
 966         XftFontClose(xw.dpy, f->match);
 967         FcPatternDestroy(f->pattern);
 968         if (f->set)
 969                 FcFontSetDestroy(f->set);
 970 }
 971
 972 void
 973 xunloadfonts(void)
 974 {
 975         /* Free the loaded fonts in the font cache.  */
 976         while (frclen > 0)
 977                 XftFontClose(xw.dpy, frc[--frclen].font);
 978
 979         xunloadfont(&dc.font);
 980         xunloadfont(&dc.bfont);
 981         xunloadfont(&dc.ifont);
 982         xunloadfont(&dc.ibfont);
 983 }
 984
 985 void
 986 xinit(void)
 987 {
 988         XGCValues gcvalues;
 989         Cursor cursor;
 990         Window parent;
 991         pid_t thispid = getpid();
 992         XColor xmousefg, xmousebg;
 993
 994         if (!(xw.dpy = XOpenDisplay(NULL)))
 995                 die("Can't open display\n");
 996         xw.scr = XDefaultScreen(xw.dpy);
 997         xw.vis = XDefaultVisual(xw.dpy, xw.scr);
 998
 999         /* font */
1000         if (!FcInit())
1001                 die("Could not init fontconfig.\n");
1002
1003         usedfont = (opt_font == NULL)? font : opt_font;
1004         xloadfonts(usedfont, 0);
1005
1006         /* colors */
1007         xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1008         xloadcols();
1009
1010         /* adjust fixed window geometry */
1011         win.w = 2 * borderpx + term.col * win.cw;
1012         win.h = 2 * borderpx + term.row * win.ch;
1013         if (xw.gm & XNegative)
1014                 xw.l += DisplayWidth(xw.dpy, xw.scr) - win.w - 2;
1015         if (xw.gm & YNegative)
1016                 xw.t += DisplayHeight(xw.dpy, xw.scr) - win.h - 2;
1017
1018         /* Events */
1019         xw.attrs.background_pixel = dc.col[defaultbg].pixel;
1020         xw.attrs.border_pixel = dc.col[defaultbg].pixel;
1021         xw.attrs.bit_gravity = NorthWestGravity;
1022         xw.attrs.event_mask = FocusChangeMask | KeyPressMask
1023                 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1024                 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
1025         xw.attrs.colormap = xw.cmap;
1026
1027         if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
1028                 parent = XRootWindow(xw.dpy, xw.scr);
1029         xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
1030                         win.w, win.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
1031                         xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
1032                         | CWEventMask | CWColormap, &xw.attrs);
1033
1034         memset(&gcvalues, 0, sizeof(gcvalues));
1035         gcvalues.graphics_exposures = False;
1036         dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
1037                         &gcvalues);
1038         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
1039                         DefaultDepth(xw.dpy, xw.scr));
1040         XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
1041         XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, win.w, win.h);
1042
1043         /* font spec buffer */
1044         xw.specbuf = xmalloc(term.col * sizeof(GlyphFontSpec));
1045
1046         /* Xft rendering context */
1047         xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
1048
1049         /* input methods */
1050         if ((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
1051                 XSetLocaleModifiers("@im=local");
1052                 if ((xw.xim =  XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
1053                         XSetLocaleModifiers("@im=");
1054                         if ((xw.xim = XOpenIM(xw.dpy,
1055                                         NULL, NULL, NULL)) == NULL) {
1056                                 die("XOpenIM failed. Could not open input"
1057                                         " device.\n");
1058                         }
1059                 }
1060         }
1061         xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
1062                                            | XIMStatusNothing, XNClientWindow, xw.win,
1063                                            XNFocusWindow, xw.win, NULL);
1064         if (xw.xic == NULL)
1065                 die("XCreateIC failed. Could not obtain input method.\n");
1066
1067         /* white cursor, black outline */
1068         cursor = XCreateFontCursor(xw.dpy, mouseshape);
1069         XDefineCursor(xw.dpy, xw.win, cursor);
1070
1071         if (XParseColor(xw.dpy, xw.cmap, colorname[mousefg], &xmousefg) == 0) {
1072                 xmousefg.red   = 0xffff;
1073                 xmousefg.green = 0xffff;
1074                 xmousefg.blue  = 0xffff;
1075         }
1076
1077         if (XParseColor(xw.dpy, xw.cmap, colorname[mousebg], &xmousebg) == 0) {
1078                 xmousebg.red   = 0x0000;
1079                 xmousebg.green = 0x0000;
1080                 xmousebg.blue  = 0x0000;
1081         }
1082
1083         XRecolorCursor(xw.dpy, cursor, &xmousefg, &xmousebg);
1084
1085         xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
1086         xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
1087         xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
1088         XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
1089
1090         xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
1091         XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
1092                         PropModeReplace, (uchar *)&thispid, 1);
1093
1094         resettitle();
1095         XMapWindow(xw.dpy, xw.win);
1096         xhints();
1097         XSync(xw.dpy, False);
1098
1099         clock_gettime(CLOCK_MONOTONIC, &xsel.tclick1);
1100         clock_gettime(CLOCK_MONOTONIC, &xsel.tclick2);
1101         xsel.primary = NULL;
1102         xsel.clipboard = NULL;
1103         xsel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
1104         if (xsel.xtarget == None)
1105                 xsel.xtarget = XA_STRING;
1106 }
1107
1108 int
1109 xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x, int y)
1110 {
1111         float winx = borderpx + x * win.cw, winy = borderpx + y * win.ch, xp, yp;
1112         ushort mode, prevmode = USHRT_MAX;
1113         Font *font = &dc.font;
1114         int frcflags = FRC_NORMAL;
1115         float runewidth = win.cw;
1116         Rune rune;
1117         FT_UInt glyphidx;
1118         FcResult fcres;
1119         FcPattern *fcpattern, *fontpattern;
1120         FcFontSet *fcsets[] = { NULL };
1121         FcCharSet *fccharset;
1122         int i, f, numspecs = 0;
1123
1124         for (i = 0, xp = winx, yp = winy + font->ascent; i < len; ++i) {
1125                 /* Fetch rune and mode for current glyph. */
1126                 rune = glyphs[i].u;
1127                 mode = glyphs[i].mode;
1128
1129                 /* Skip dummy wide-character spacing. */
1130                 if (mode == ATTR_WDUMMY)
1131                         continue;
1132
1133                 /* Determine font for glyph if different from previous glyph. */
1134                 if (prevmode != mode) {
1135                         prevmode = mode;
1136                         font = &dc.font;
1137                         frcflags = FRC_NORMAL;
1138                         runewidth = win.cw * ((mode & ATTR_WIDE) ? 2.0f : 1.0f);
1139                         if ((mode & ATTR_ITALIC) && (mode & ATTR_BOLD)) {
1140                                 font = &dc.ibfont;
1141                                 frcflags = FRC_ITALICBOLD;
1142                         } else if (mode & ATTR_ITALIC) {
1143                                 font = &dc.ifont;
1144                                 frcflags = FRC_ITALIC;
1145                         } else if (mode & ATTR_BOLD) {
1146                                 font = &dc.bfont;
1147                                 frcflags = FRC_BOLD;
1148                         }
1149                         yp = winy + font->ascent;
1150                 }
1151
1152                 /* Lookup character index with default font. */
1153                 glyphidx = XftCharIndex(xw.dpy, font->match, rune);
1154                 if (glyphidx) {
1155                         specs[numspecs].font = font->match;
1156                         specs[numspecs].glyph = glyphidx;
1157                         specs[numspecs].x = (short)xp;
1158                         specs[numspecs].y = (short)yp;
1159                         xp += runewidth;
1160                         numspecs++;
1161                         continue;
1162                 }
1163
1164                 /* Fallback on font cache, search the font cache for match. */
1165                 for (f = 0; f < frclen; f++) {
1166                         glyphidx = XftCharIndex(xw.dpy, frc[f].font, rune);
1167                         /* Everything correct. */
1168                         if (glyphidx && frc[f].flags == frcflags)
1169                                 break;
1170                         /* We got a default font for a not found glyph. */
1171                         if (!glyphidx && frc[f].flags == frcflags
1172                                         && frc[f].unicodep == rune) {
1173                                 break;
1174                         }
1175                 }
1176
1177                 /* Nothing was found. Use fontconfig to find matching font. */
1178                 if (f >= frclen) {
1179                         if (!font->set)
1180                                 font->set = FcFontSort(0, font->pattern,
1181                                                        1, 0, &fcres);
1182                         fcsets[0] = font->set;
1183
1184                         /*
1185                          * Nothing was found in the cache. Now use
1186                          * some dozen of Fontconfig calls to get the
1187                          * font for one single character.
1188                          *
1189                          * Xft and fontconfig are design failures.
1190                          */
1191                         fcpattern = FcPatternDuplicate(font->pattern);
1192                         fccharset = FcCharSetCreate();
1193
1194                         FcCharSetAddChar(fccharset, rune);
1195                         FcPatternAddCharSet(fcpattern, FC_CHARSET,
1196                                         fccharset);
1197                         FcPatternAddBool(fcpattern, FC_SCALABLE, 1);
1198
1199                         FcConfigSubstitute(0, fcpattern,
1200                                         FcMatchPattern);
1201                         FcDefaultSubstitute(fcpattern);
1202
1203                         fontpattern = FcFontSetMatch(0, fcsets, 1,
1204                                         fcpattern, &fcres);
1205
1206                         /*
1207                          * Overwrite or create the new cache entry.
1208                          */
1209                         if (frclen >= LEN(frc)) {
1210                                 frclen = LEN(frc) - 1;
1211                                 XftFontClose(xw.dpy, frc[frclen].font);
1212                                 frc[frclen].unicodep = 0;
1213                         }
1214
1215                         frc[frclen].font = XftFontOpenPattern(xw.dpy,
1216                                         fontpattern);
1217                         if (!frc[frclen].font)
1218                                 die("XftFontOpenPattern failed seeking fallback font: %s\n",
1219                                         strerror(errno));
1220                         frc[frclen].flags = frcflags;
1221                         frc[frclen].unicodep = rune;
1222
1223                         glyphidx = XftCharIndex(xw.dpy, frc[frclen].font, rune);
1224
1225                         f = frclen;
1226                         frclen++;
1227
1228                         FcPatternDestroy(fcpattern);
1229                         FcCharSetDestroy(fccharset);
1230                 }
1231
1232                 specs[numspecs].font = frc[f].font;
1233                 specs[numspecs].glyph = glyphidx;
1234                 specs[numspecs].x = (short)xp;
1235                 specs[numspecs].y = (short)yp;
1236                 xp += runewidth;
1237                 numspecs++;
1238         }
1239
1240         return numspecs;
1241 }
1242
1243 void
1244 xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, int y)
1245 {
1246         int charlen = len * ((base.mode & ATTR_WIDE) ? 2 : 1);
1247         int winx = borderpx + x * win.cw, winy = borderpx + y * win.ch,
1248             width = charlen * win.cw;
1249         Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
1250         XRenderColor colfg, colbg;
1251         XRectangle r;
1252
1253         /* Fallback on color display for attributes not supported by the font */
1254         if (base.mode & ATTR_ITALIC && base.mode & ATTR_BOLD) {
1255                 if (dc.ibfont.badslant || dc.ibfont.badweight)
1256                         base.fg = defaultattr;
1257         } else if ((base.mode & ATTR_ITALIC && dc.ifont.badslant) ||
1258             (base.mode & ATTR_BOLD && dc.bfont.badweight)) {
1259                 base.fg = defaultattr;
1260         }
1261
1262         if (IS_TRUECOL(base.fg)) {
1263                 colfg.alpha = 0xffff;
1264                 colfg.red = TRUERED(base.fg);
1265                 colfg.green = TRUEGREEN(base.fg);
1266                 colfg.blue = TRUEBLUE(base.fg);
1267                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
1268                 fg = &truefg;
1269         } else {
1270                 fg = &dc.col[base.fg];
1271         }
1272
1273         if (IS_TRUECOL(base.bg)) {
1274                 colbg.alpha = 0xffff;
1275                 colbg.green = TRUEGREEN(base.bg);
1276                 colbg.red = TRUERED(base.bg);
1277                 colbg.blue = TRUEBLUE(base.bg);
1278                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
1279                 bg = &truebg;
1280         } else {
1281                 bg = &dc.col[base.bg];
1282         }
1283
1284         /* Change basic system colors [0-7] to bright system colors [8-15] */
1285         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_BOLD && BETWEEN(base.fg, 0, 7))
1286                 fg = &dc.col[base.fg + 8];
1287
1288         if (IS_SET(MODE_REVERSE)) {
1289                 if (fg == &dc.col[defaultfg]) {
1290                         fg = &dc.col[defaultbg];
1291                 } else {
1292                         colfg.red = ~fg->color.red;
1293                         colfg.green = ~fg->color.green;
1294                         colfg.blue = ~fg->color.blue;
1295                         colfg.alpha = fg->color.alpha;
1296                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
1297                                         &revfg);
1298                         fg = &revfg;
1299                 }
1300
1301                 if (bg == &dc.col[defaultbg]) {
1302                         bg = &dc.col[defaultfg];
1303                 } else {
1304                         colbg.red = ~bg->color.red;
1305                         colbg.green = ~bg->color.green;
1306                         colbg.blue = ~bg->color.blue;
1307                         colbg.alpha = bg->color.alpha;
1308                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
1309                                         &revbg);
1310                         bg = &revbg;
1311                 }
1312         }
1313
1314         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_FAINT) {
1315                 colfg.red = fg->color.red / 2;
1316                 colfg.green = fg->color.green / 2;
1317                 colfg.blue = fg->color.blue / 2;
1318                 colfg.alpha = fg->color.alpha;
1319                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
1320                 fg = &revfg;
1321         }
1322
1323
1324         if (base.mode & ATTR_REVERSE) {
1325                 temp = fg;
1326                 fg = bg;
1327                 bg = temp;
1328         }
1329
1330         if (base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
1331                 fg = bg;
1332
1333         if (base.mode & ATTR_INVISIBLE)
1334                 fg = bg;
1335
1336         /* Intelligent cleaning up of the borders. */
1337         if (x == 0) {
1338                 xclear(0, (y == 0)? 0 : winy, borderpx,
1339                         winy + win.ch + ((y >= term.row-1)? win.h : 0));
1340         }
1341         if (x + charlen >= term.col) {
1342                 xclear(winx + width, (y == 0)? 0 : winy, win.w,
1343                         ((y >= term.row-1)? win.h : (winy + win.ch)));
1344         }
1345         if (y == 0)
1346                 xclear(winx, 0, winx + width, borderpx);
1347         if (y == term.row-1)
1348                 xclear(winx, winy + win.ch, winx + width, win.h);
1349
1350         /* Clean up the region we want to draw to. */
1351         XftDrawRect(xw.draw, bg, winx, winy, width, win.ch);
1352
1353         /* Set the clip region because Xft is sometimes dirty. */
1354         r.x = 0;
1355         r.y = 0;
1356         r.height = win.ch;
1357         r.width = width;
1358         XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
1359
1360         /* Render the glyphs. */
1361         XftDrawGlyphFontSpec(xw.draw, fg, specs, len);
1362
1363         /* Render underline and strikethrough. */
1364         if (base.mode & ATTR_UNDERLINE) {
1365                 XftDrawRect(xw.draw, fg, winx, winy + dc.font.ascent + 1,
1366                                 width, 1);
1367         }
1368
1369         if (base.mode & ATTR_STRUCK) {
1370                 XftDrawRect(xw.draw, fg, winx, winy + 2 * dc.font.ascent / 3,
1371                                 width, 1);
1372         }
1373
1374         /* Reset clip to none. */
1375         XftDrawSetClip(xw.draw, 0);
1376 }
1377
1378 void
1379 xdrawglyph(Glyph g, int x, int y)
1380 {
1381         int numspecs;
1382         XftGlyphFontSpec spec;
1383
1384         numspecs = xmakeglyphfontspecs(&spec, &g, 1, x, y);
1385         xdrawglyphfontspecs(&spec, g, numspecs, x, y);
1386 }
1387
1388 void
1389 xdrawcursor(void)
1390 {
1391         static int oldx = 0, oldy = 0;
1392         int curx;
1393         Glyph g = {' ', ATTR_NULL, defaultbg, defaultcs}, og;
1394         Color drawcol;
1395
1396         LIMIT(oldx, 0, term.col-1);
1397         LIMIT(oldy, 0, term.row-1);
1398
1399         curx = term.c.x;
1400
1401         /* adjust position if in dummy */
1402         if (term.line[oldy][oldx].mode & ATTR_WDUMMY)
1403                 oldx--;
1404         if (term.line[term.c.y][curx].mode & ATTR_WDUMMY)
1405                 curx--;
1406
1407         /* remove the old cursor */
1408         og = term.line[oldy][oldx];
1409         if (selected(oldx, oldy))
1410                 og.mode ^= ATTR_REVERSE;
1411         xdrawglyph(og, oldx, oldy);
1412
1413         g.u = term.line[term.c.y][term.c.x].u;
1414         g.mode |= term.line[term.c.y][term.c.x].mode &
1415                   (ATTR_BOLD | ATTR_ITALIC | ATTR_UNDERLINE | ATTR_STRUCK);
1416
1417         /*
1418          * Select the right color for the right mode.
1419          */
1420         if (IS_SET(MODE_REVERSE)) {
1421                 g.mode |= ATTR_REVERSE;
1422                 g.bg = defaultfg;
1423                 if (selected(term.c.x, term.c.y)) {
1424                         drawcol = dc.col[defaultcs];
1425                         g.fg = defaultrcs;
1426                 } else {
1427                         drawcol = dc.col[defaultrcs];
1428                         g.fg = defaultcs;
1429                 }
1430         } else {
1431                 if (selected(term.c.x, term.c.y)) {
1432                         drawcol = dc.col[defaultrcs];
1433                         g.fg = defaultfg;
1434                         g.bg = defaultrcs;
1435                 } else {
1436                         drawcol = dc.col[defaultcs];
1437                 }
1438         }
1439
1440         if (IS_SET(MODE_HIDE))
1441                 return;
1442
1443         /* draw the new one */
1444         if (win.state & WIN_FOCUSED) {
1445                 switch (win.cursor) {
1446                 case 7: /* st extension: snowman */
1447                         utf8decode("☃", &g.u, UTF_SIZ);
1448                 case 0: /* Blinking Block */
1449                 case 1: /* Blinking Block (Default) */
1450                 case 2: /* Steady Block */
1451                         g.mode |= term.line[term.c.y][curx].mode & ATTR_WIDE;
1452                         xdrawglyph(g, term.c.x, term.c.y);
1453                         break;
1454                 case 3: /* Blinking Underline */
1455                 case 4: /* Steady Underline */
1456                         XftDrawRect(xw.draw, &drawcol,
1457                                         borderpx + curx * win.cw,
1458                                         borderpx + (term.c.y + 1) * win.ch - \
1459                                                 cursorthickness,
1460                                         win.cw, cursorthickness);
1461                         break;
1462                 case 5: /* Blinking bar */
1463                 case 6: /* Steady bar */
1464                         XftDrawRect(xw.draw, &drawcol,
1465                                         borderpx + curx * win.cw,
1466                                         borderpx + term.c.y * win.ch,
1467                                         cursorthickness, win.ch);
1468                         break;
1469                 }
1470         } else {
1471                 XftDrawRect(xw.draw, &drawcol,
1472                                 borderpx + curx * win.cw,
1473                                 borderpx + term.c.y * win.ch,
1474                                 win.cw - 1, 1);
1475                 XftDrawRect(xw.draw, &drawcol,
1476                                 borderpx + curx * win.cw,
1477                                 borderpx + term.c.y * win.ch,
1478                                 1, win.ch - 1);
1479                 XftDrawRect(xw.draw, &drawcol,
1480                                 borderpx + (curx + 1) * win.cw - 1,
1481                                 borderpx + term.c.y * win.ch,
1482                                 1, win.ch - 1);
1483                 XftDrawRect(xw.draw, &drawcol,
1484                                 borderpx + curx * win.cw,
1485                                 borderpx + (term.c.y + 1) * win.ch - 1,
1486                                 win.cw, 1);
1487         }
1488         oldx = curx, oldy = term.c.y;
1489 }
1490
1491 void
1492 xsetenv(void)
1493 {
1494         char buf[sizeof(long) * 8 + 1];
1495
1496         snprintf(buf, sizeof(buf), "%lu", xw.win);
1497         setenv("WINDOWID", buf, 1);
1498 }
1499
1500 void
1501 xsettitle(char *p)
1502 {
1503         XTextProperty prop;
1504         DEFAULT(p, "st");
1505
1506         Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
1507                         &prop);
1508         XSetWMName(xw.dpy, xw.win, &prop);
1509         XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
1510         XFree(prop.value);
1511 }
1512
1513 void
1514 draw(void)
1515 {
1516         drawregion(0, 0, term.col, term.row);
1517         XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, win.w,
1518                         win.h, 0, 0);
1519         XSetForeground(xw.dpy, dc.gc,
1520                         dc.col[IS_SET(MODE_REVERSE)?
1521                                 defaultfg : defaultbg].pixel);
1522 }
1523
1524 void
1525 drawregion(int x1, int y1, int x2, int y2)
1526 {
1527         int i, x, y, ox, numspecs;
1528         Glyph base, new;
1529         XftGlyphFontSpec *specs;
1530
1531         if (!(win.state & WIN_VISIBLE))
1532                 return;
1533
1534         for (y = y1; y < y2; y++) {
1535                 if (!term.dirty[y])
1536                         continue;
1537
1538                 term.dirty[y] = 0;
1539
1540                 specs = xw.specbuf;
1541                 numspecs = xmakeglyphfontspecs(specs, &term.line[y][x1], x2 - x1, x1, y);
1542
1543                 i = ox = 0;
1544                 for (x = x1; x < x2 && i < numspecs; x++) {
1545                         new = term.line[y][x];
1546                         if (new.mode == ATTR_WDUMMY)
1547                                 continue;
1548                         if (selected(x, y))
1549                                 new.mode ^= ATTR_REVERSE;
1550                         if (i > 0 && ATTRCMP(base, new)) {
1551                                 xdrawglyphfontspecs(specs, base, i, ox, y);
1552                                 specs += i;
1553                                 numspecs -= i;
1554                                 i = 0;
1555                         }
1556                         if (i == 0) {
1557                                 ox = x;
1558                                 base = new;
1559                         }
1560                         i++;
1561                 }
1562                 if (i > 0)
1563                         xdrawglyphfontspecs(specs, base, i, ox, y);
1564         }
1565         xdrawcursor();
1566 }
1567
1568 void
1569 expose(XEvent *ev)
1570 {
1571         redraw();
1572 }
1573
1574 void
1575 visibility(XEvent *ev)
1576 {
1577         XVisibilityEvent *e = &ev->xvisibility;
1578
1579         MODBIT(win.state, e->state != VisibilityFullyObscured, WIN_VISIBLE);
1580 }
1581
1582 void
1583 unmap(XEvent *ev)
1584 {
1585         win.state &= ~WIN_VISIBLE;
1586 }
1587
1588 void
1589 xsetpointermotion(int set)
1590 {
1591         MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
1592         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
1593 }
1594
1595 int
1596 xsetcursor(int cursor)
1597 {
1598         DEFAULT(cursor, 1);
1599         if (!BETWEEN(cursor, 0, 6))
1600                 return 1;
1601         win.cursor = cursor;
1602         return 0;
1603 }
1604
1605 void
1606 xseturgency(int add)
1607 {
1608         XWMHints *h = XGetWMHints(xw.dpy, xw.win);
1609
1610         MODBIT(h->flags, add, XUrgencyHint);
1611         XSetWMHints(xw.dpy, xw.win, h);
1612         XFree(h);
1613 }
1614
1615 void
1616 xbell(void)
1617 {
1618         if (!(win.state & WIN_FOCUSED))
1619                 xseturgency(1);
1620         if (bellvolume)
1621                 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
1622 }
1623
1624 void
1625 focus(XEvent *ev)
1626 {
1627         XFocusChangeEvent *e = &ev->xfocus;
1628
1629         if (e->mode == NotifyGrab)
1630                 return;
1631
1632         if (ev->type == FocusIn) {
1633                 XSetICFocus(xw.xic);
1634                 win.state |= WIN_FOCUSED;
1635                 xseturgency(0);
1636                 if (IS_SET(MODE_FOCUS))
1637                         ttywrite("\033[I", 3);
1638         } else {
1639                 XUnsetICFocus(xw.xic);
1640                 win.state &= ~WIN_FOCUSED;
1641                 if (IS_SET(MODE_FOCUS))
1642                         ttywrite("\033[O", 3);
1643         }
1644 }
1645
1646 int
1647 match(uint mask, uint state)
1648 {
1649         return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
1650 }
1651
1652 char*
1653 kmap(KeySym k, uint state)
1654 {
1655         Key *kp;
1656         int i;
1657
1658         /* Check for mapped keys out of X11 function keys. */
1659         for (i = 0; i < LEN(mappedkeys); i++) {
1660                 if (mappedkeys[i] == k)
1661                         break;
1662         }
1663         if (i == LEN(mappedkeys)) {
1664                 if ((k & 0xFFFF) < 0xFD00)
1665                         return NULL;
1666         }
1667
1668         for (kp = key; kp < key + LEN(key); kp++) {
1669                 if (kp->k != k)
1670                         continue;
1671
1672                 if (!match(kp->mask, state))
1673                         continue;
1674
1675                 if (IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
1676                         continue;
1677                 if (term.numlock && kp->appkey == 2)
1678                         continue;
1679
1680                 if (IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
1681                         continue;
1682
1683                 if (IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
1684                         continue;
1685
1686                 return kp->s;
1687         }
1688
1689         return NULL;
1690 }
1691
1692 void
1693 kpress(XEvent *ev)
1694 {
1695         XKeyEvent *e = &ev->xkey;
1696         KeySym ksym;
1697         char buf[32], *customkey;
1698         int len;
1699         Rune c;
1700         Status status;
1701         Shortcut *bp;
1702
1703         if (IS_SET(MODE_KBDLOCK))
1704                 return;
1705
1706         len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
1707         /* 1. shortcuts */
1708         for (bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
1709                 if (ksym == bp->keysym && match(bp->mod, e->state)) {
1710                         bp->func(&(bp->arg));
1711                         return;
1712                 }
1713         }
1714
1715         /* 2. custom keys from config.h */
1716         if ((customkey = kmap(ksym, e->state))) {
1717                 ttysend(customkey, strlen(customkey));
1718                 return;
1719         }
1720
1721         /* 3. composed string from input method */
1722         if (len == 0)
1723                 return;
1724         if (len == 1 && e->state & Mod1Mask) {
1725                 if (IS_SET(MODE_8BIT)) {
1726                         if (*buf < 0177) {
1727                                 c = *buf | 0x80;
1728                                 len = utf8encode(c, buf);
1729                         }
1730                 } else {
1731                         buf[1] = buf[0];
1732                         buf[0] = '\033';
1733                         len = 2;
1734                 }
1735         }
1736         ttysend(buf, len);
1737 }
1738
1739
1740 void
1741 cmessage(XEvent *e)
1742 {
1743         /*
1744          * See xembed specs
1745          *  http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
1746          */
1747         if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
1748                 if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
1749                         win.state |= WIN_FOCUSED;
1750                         xseturgency(0);
1751                 } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
1752                         win.state &= ~WIN_FOCUSED;
1753                 }
1754         } else if (e->xclient.data.l[0] == xw.wmdeletewin) {
1755                 /* Send SIGHUP to shell */
1756                 kill(pid, SIGHUP);
1757                 exit(0);
1758         }
1759 }
1760
1761 void
1762 resize(XEvent *e)
1763 {
1764         if (e->xconfigure.width == win.w && e->xconfigure.height == win.h)
1765                 return;
1766
1767         cresize(e->xconfigure.width, e->xconfigure.height);
1768 }
1769
1770 void
1771 run(void)
1772 {
1773         XEvent ev;
1774         int w = win.w, h = win.h;
1775         fd_set rfd;
1776         int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
1777         struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
1778         long deltatime;
1779
1780         /* Waiting for window mapping */
1781         do {
1782                 XNextEvent(xw.dpy, &ev);
1783                 /*
1784                  * This XFilterEvent call is required because of XOpenIM. It
1785                  * does filter out the key event and some client message for
1786                  * the input method too.
1787                  */
1788                 if (XFilterEvent(&ev, None))
1789                         continue;
1790                 if (ev.type == ConfigureNotify) {
1791                         w = ev.xconfigure.width;
1792                         h = ev.xconfigure.height;
1793                 }
1794         } while (ev.type != MapNotify);
1795
1796         ttynew(opt_line, opt_io, opt_cmd);
1797         cresize(w, h);
1798
1799         clock_gettime(CLOCK_MONOTONIC, &last);
1800         lastblink = last;
1801
1802         for (xev = actionfps;;) {
1803                 FD_ZERO(&rfd);
1804                 FD_SET(cmdfd, &rfd);
1805                 FD_SET(xfd, &rfd);
1806
1807                 if (pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
1808                         if (errno == EINTR)
1809                                 continue;
1810                         die("select failed: %s\n", strerror(errno));
1811                 }
1812                 if (FD_ISSET(cmdfd, &rfd)) {
1813                         ttyread();
1814                         if (blinktimeout) {
1815                                 blinkset = tattrset(ATTR_BLINK);
1816                                 if (!blinkset)
1817                                         MODBIT(term.mode, 0, MODE_BLINK);
1818                         }
1819                 }
1820
1821                 if (FD_ISSET(xfd, &rfd))
1822                         xev = actionfps;
1823
1824                 clock_gettime(CLOCK_MONOTONIC, &now);
1825                 drawtimeout.tv_sec = 0;
1826                 drawtimeout.tv_nsec =  (1000 * 1E6)/ xfps;
1827                 tv = &drawtimeout;
1828
1829                 dodraw = 0;
1830                 if (blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
1831                         tsetdirtattr(ATTR_BLINK);
1832                         term.mode ^= MODE_BLINK;
1833                         lastblink = now;
1834                         dodraw = 1;
1835                 }
1836                 deltatime = TIMEDIFF(now, last);
1837                 if (deltatime > 1000 / (xev ? xfps : actionfps)) {
1838                         dodraw = 1;
1839                         last = now;
1840                 }
1841
1842                 if (dodraw) {
1843                         while (XPending(xw.dpy)) {
1844                                 XNextEvent(xw.dpy, &ev);
1845                                 if (XFilterEvent(&ev, None))
1846                                         continue;
1847                                 if (handler[ev.type])
1848                                         (handler[ev.type])(&ev);
1849                         }
1850
1851                         draw();
1852                         XFlush(xw.dpy);
1853
1854                         if (xev && !FD_ISSET(xfd, &rfd))
1855                                 xev--;
1856                         if (!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
1857                                 if (blinkset) {
1858                                         if (TIMEDIFF(now, lastblink) \
1859                                                         > blinktimeout) {
1860                                                 drawtimeout.tv_nsec = 1000;
1861                                         } else {
1862                                                 drawtimeout.tv_nsec = (1E6 * \
1863                                                         (blinktimeout - \
1864                                                         TIMEDIFF(now,
1865                                                                 lastblink)));
1866                                         }
1867                                         drawtimeout.tv_sec = \
1868                                             drawtimeout.tv_nsec / 1E9;
1869                                         drawtimeout.tv_nsec %= (long)1E9;
1870                                 } else {
1871                                         tv = NULL;
1872                                 }
1873                         }
1874                 }
1875         }
1876 }
1877
1878 void
1879 usage(void)
1880 {
1881         die("usage: %s [-aiv] [-c class] [-f font] [-g geometry]"
1882             " [-n name] [-o file]\n"
1883             "          [-T title] [-t title] [-w windowid]"
1884             " [[-e] command [args ...]]\n"
1885             "       %s [-aiv] [-c class] [-f font] [-g geometry]"
1886             " [-n name] [-o file]\n"
1887             "          [-T title] [-t title] [-w windowid] -l line"
1888             " [stty_args ...]\n", argv0, argv0);
1889 }
1890
1891 int
1892 main(int argc, char *argv[])
1893 {
1894         xw.l = xw.t = 0;
1895         xw.isfixed = False;
1896         win.cursor = cursorshape;
1897
1898         ARGBEGIN {
1899         case 'a':
1900                 allowaltscreen = 0;
1901                 break;
1902         case 'c':
1903                 opt_class = EARGF(usage());
1904                 break;
1905         case 'e':
1906                 if (argc > 0)
1907                         --argc, ++argv;
1908                 goto run;
1909         case 'f':
1910                 opt_font = EARGF(usage());
1911                 break;
1912         case 'g':
1913                 xw.gm = XParseGeometry(EARGF(usage()),
1914                                 &xw.l, &xw.t, &cols, &rows);
1915                 break;
1916         case 'i':
1917                 xw.isfixed = 1;
1918                 break;
1919         case 'o':
1920                 opt_io = EARGF(usage());
1921                 break;
1922         case 'l':
1923                 opt_line = EARGF(usage());
1924                 break;
1925         case 'n':
1926                 opt_name = EARGF(usage());
1927                 break;
1928         case 't':
1929         case 'T':
1930                 opt_title = EARGF(usage());
1931                 break;
1932         case 'w':
1933                 opt_embed = EARGF(usage());
1934                 break;
1935         case 'v':
1936                 die("%s " VERSION " (c) 2010-2016 st engineers\n", argv0);
1937                 break;
1938         default:
1939                 usage();
1940         } ARGEND;
1941
1942 run:
1943         if (argc > 0) {
1944                 /* eat all remaining arguments */
1945                 opt_cmd = argv;
1946                 if (!opt_title && !opt_line)
1947                         opt_title = basename(xstrdup(argv[0]));
1948         }
1949         setlocale(LC_CTYPE, "");
1950         XSetLocaleModifiers("");
1951         tnew(MAX(cols, 1), MAX(rows, 1));
1952         xinit();
1953         xsetenv();
1954         selinit();
1955         run();
1956
1957         return 0;
1958 }