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