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 /* function definitions used in config.h */
  48 static void clipcopy(const Arg *);
  49 static void clippaste(const Arg *);
  50 static void selpaste(const Arg *);
  51 static void zoom(const Arg *);
  52 static void zoomabs(const Arg *);
  53 static void zoomreset(const Arg *);
  54
  55 /* config.h for applying patches and the configuration. */
  56 #include "config.h"
  57
  58 /* XEMBED messages */
  59 #define XEMBED_FOCUS_IN  4
  60 #define XEMBED_FOCUS_OUT 5
  61
  62 /* macros */
  63 #define TRUERED(x)              (((x) & 0xff0000) >> 8)
  64 #define TRUEGREEN(x)            (((x) & 0xff00))
  65 #define TRUEBLUE(x)             (((x) & 0xff) << 8)
  66
  67 typedef XftDraw *Draw;
  68 typedef XftColor Color;
  69 typedef XftGlyphFontSpec GlyphFontSpec;
  70
  71 /* Purely graphic info */
  72 typedef struct {
  73         Display *dpy;
  74         Colormap cmap;
  75         Window win;
  76         Drawable buf;
  77         GlyphFontSpec *specbuf; /* font spec buffer used for rendering */
  78         Atom xembed, wmdeletewin, netwmname, netwmpid;
  79         XIM xim;
  80         XIC xic;
  81         Draw draw;
  82         Visual *vis;
  83         XSetWindowAttributes attrs;
  84         int scr;
  85         int isfixed; /* is fixed geometry? */
  86         int l, t; /* left and top offset */
  87         int gm; /* geometry mask */
  88 } XWindow;
  89
  90 typedef struct {
  91         Atom xtarget;
  92 } XSelection;
  93
  94 /* Font structure */
  95 #define Font Font_
  96 typedef struct {
  97         int height;
  98         int width;
  99         int ascent;
 100         int descent;
 101         int badslant;
 102         int badweight;
 103         short lbearing;
 104         short rbearing;
 105         XftFont *match;
 106         FcFontSet *set;
 107         FcPattern *pattern;
 108 } Font;
 109
 110 /* Drawing Context */
 111 typedef struct {
 112         Color *col;
 113         size_t collen;
 114         Font font, bfont, ifont, ibfont;
 115         GC gc;
 116 } DC;
 117
 118 static inline ushort sixd_to_16bit(int);
 119 static int xmakeglyphfontspecs(XftGlyphFontSpec *, const Glyph *, int, int, int);
 120 static void xdrawglyphfontspecs(const XftGlyphFontSpec *, Glyph, int, int, int);
 121 static void xdrawglyph(Glyph, int, int);
 122 static void xclear(int, int, int, int);
 123 static void xdrawcursor(void);
 124 static int xgeommasktogravity(int);
 125 static void xinit(void);
 126 static void cresize(int, int);
 127 static void xresize(int, int);
 128 static int xloadfont(Font *, FcPattern *);
 129 static void xloadfonts(char *, double);
 130 static void xunloadfont(Font *);
 131 static void xunloadfonts(void);
 132 static void xsetenv(void);
 133 static void xseturgency(int);
 134 static int x2col(int);
 135 static int y2row(int);
 136
 137 static void expose(XEvent *);
 138 static void visibility(XEvent *);
 139 static void unmap(XEvent *);
 140 static void kpress(XEvent *);
 141 static void cmessage(XEvent *);
 142 static void resize(XEvent *);
 143 static void focus(XEvent *);
 144 static void brelease(XEvent *);
 145 static void bpress(XEvent *);
 146 static void bmotion(XEvent *);
 147 static void propnotify(XEvent *);
 148 static void selnotify(XEvent *);
 149 static void selclear_(XEvent *);
 150 static void selrequest(XEvent *);
 151 static void selcopy(Time);
 152 static void getbuttoninfo(XEvent *);
 153 static void mousereport(XEvent *);
 154 static char *kmap(KeySym, uint);
 155 static int match(uint, uint);
 156
 157 static void run(void);
 158 static void usage(void);
 159
 160 static void (*handler[LASTEvent])(XEvent *) = {
 161         [KeyPress] = kpress,
 162         [ClientMessage] = cmessage,
 163         [ConfigureNotify] = resize,
 164         [VisibilityNotify] = visibility,
 165         [UnmapNotify] = unmap,
 166         [Expose] = expose,
 167         [FocusIn] = focus,
 168         [FocusOut] = focus,
 169         [MotionNotify] = bmotion,
 170         [ButtonPress] = bpress,
 171         [ButtonRelease] = brelease,
 172 /*
 173  * Uncomment if you want the selection to disappear when you select something
 174  * different in another window.
 175  */
 176 /*      [SelectionClear] = selclear_, */
 177         [SelectionNotify] = selnotify,
 178 /*
 179  * PropertyNotify is only turned on when there is some INCR transfer happening
 180  * for the selection retrieval.
 181  */
 182         [PropertyNotify] = propnotify,
 183         [SelectionRequest] = selrequest,
 184 };
 185
 186 /* Globals */
 187 static DC dc;
 188 static XWindow xw;
 189 static XSelection xsel;
 190
 191 enum window_state {
 192         WIN_VISIBLE = 1,
 193         WIN_FOCUSED = 2
 194 };
 195
 196 /* Font Ring Cache */
 197 enum {
 198         FRC_NORMAL,
 199         FRC_ITALIC,
 200         FRC_BOLD,
 201         FRC_ITALICBOLD
 202 };
 203
 204 typedef struct {
 205         XftFont *font;
 206         int flags;
 207         Rune unicodep;
 208 } Fontcache;
 209
 210 /* Fontcache is an array now. A new font will be appended to the array. */
 211 static Fontcache frc[16];
 212 static int frclen = 0;
 213 static char *usedfont = NULL;
 214 static double usedfontsize = 0;
 215 static double defaultfontsize = 0;
 216
 217 static char *opt_class = NULL;
 218 static char **opt_cmd  = NULL;
 219 static char *opt_embed = NULL;
 220 static char *opt_font  = NULL;
 221 static char *opt_io    = NULL;
 222 static char *opt_line  = NULL;
 223 static char *opt_name  = NULL;
 224 static char *opt_title = NULL;
 225
 226 void
 227 clipcopy(const Arg *dummy)
 228 {
 229         Atom clipboard;
 230
 231         if (sel.clipboard != NULL)
 232                 free(sel.clipboard);
 233
 234         if (sel.primary != NULL) {
 235                 sel.clipboard = xstrdup(sel.primary);
 236                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 237                 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
 238         }
 239 }
 240
 241 void
 242 clippaste(const Arg *dummy)
 243 {
 244         Atom clipboard;
 245
 246         clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 247         XConvertSelection(xw.dpy, clipboard, xsel.xtarget, clipboard,
 248                         xw.win, CurrentTime);
 249 }
 250
 251 void
 252 selpaste(const Arg *dummy)
 253 {
 254         XConvertSelection(xw.dpy, XA_PRIMARY, xsel.xtarget, XA_PRIMARY,
 255                         xw.win, CurrentTime);
 256 }
 257
 258 void
 259 zoom(const Arg *arg)
 260 {
 261         Arg larg;
 262
 263         larg.f = usedfontsize + arg->f;
 264         zoomabs(&larg);
 265 }
 266
 267 void
 268 zoomabs(const Arg *arg)
 269 {
 270         xunloadfonts();
 271         xloadfonts(usedfont, arg->f);
 272         cresize(0, 0);
 273         ttyresize(win.tw, win.th);
 274         redraw();
 275         xhints();
 276 }
 277
 278 void
 279 zoomreset(const Arg *arg)
 280 {
 281         Arg larg;
 282
 283         if (defaultfontsize > 0) {
 284                 larg.f = defaultfontsize;
 285                 zoomabs(&larg);
 286         }
 287 }
 288
 289 int
 290 x2col(int x)
 291 {
 292         x -= borderpx;
 293         x /= win.cw;
 294
 295         return LIMIT(x, 0, term.col-1);
 296 }
 297
 298 int
 299 y2row(int y)
 300 {
 301         y -= borderpx;
 302         y /= win.ch;
 303
 304         return LIMIT(y, 0, term.row-1);
 305 }
 306
 307 void
 308 getbuttoninfo(XEvent *e)
 309 {
 310         int type;
 311         uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
 312
 313         sel.alt = IS_SET(MODE_ALTSCREEN);
 314
 315         sel.oe.x = x2col(e->xbutton.x);
 316         sel.oe.y = y2row(e->xbutton.y);
 317         selnormalize();
 318
 319         sel.type = SEL_REGULAR;
 320         for (type = 1; type < LEN(selmasks); ++type) {
 321                 if (match(selmasks[type], state)) {
 322                         sel.type = type;
 323                         break;
 324                 }
 325         }
 326 }
 327
 328 void
 329 mousereport(XEvent *e)
 330 {
 331         int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
 332             button = e->xbutton.button, state = e->xbutton.state,
 333             len;
 334         char buf[40];
 335         static int ox, oy;
 336
 337         /* from urxvt */
 338         if (e->xbutton.type == MotionNotify) {
 339                 if (x == ox && y == oy)
 340                         return;
 341                 if (!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
 342                         return;
 343                 /* MOUSE_MOTION: no reporting if no button is pressed */
 344                 if (IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
 345                         return;
 346
 347                 button = oldbutton + 32;
 348                 ox = x;
 349                 oy = y;
 350         } else {
 351                 if (!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
 352                         button = 3;
 353                 } else {
 354                         button -= Button1;
 355                         if (button >= 3)
 356                                 button += 64 - 3;
 357                 }
 358                 if (e->xbutton.type == ButtonPress) {
 359                         oldbutton = button;
 360                         ox = x;
 361                         oy = y;
 362                 } else if (e->xbutton.type == ButtonRelease) {
 363                         oldbutton = 3;
 364                         /* MODE_MOUSEX10: no button release reporting */
 365                         if (IS_SET(MODE_MOUSEX10))
 366                                 return;
 367                         if (button == 64 || button == 65)
 368                                 return;
 369                 }
 370         }
 371
 372         if (!IS_SET(MODE_MOUSEX10)) {
 373                 button += ((state & ShiftMask  ) ? 4  : 0)
 374                         + ((state & Mod4Mask   ) ? 8  : 0)
 375                         + ((state & ControlMask) ? 16 : 0);
 376         }
 377
 378         if (IS_SET(MODE_MOUSESGR)) {
 379                 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
 380                                 button, x+1, y+1,
 381                                 e->xbutton.type == ButtonRelease ? 'm' : 'M');
 382         } else if (x < 223 && y < 223) {
 383                 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
 384                                 32+button, 32+x+1, 32+y+1);
 385         } else {
 386                 return;
 387         }
 388
 389         ttywrite(buf, len);
 390 }
 391
 392 void
 393 bpress(XEvent *e)
 394 {
 395         struct timespec now;
 396         MouseShortcut *ms;
 397
 398         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 399                 mousereport(e);
 400                 return;
 401         }
 402
 403         for (ms = mshortcuts; ms < mshortcuts + LEN(mshortcuts); ms++) {
 404                 if (e->xbutton.button == ms->b
 405                                 && match(ms->mask, e->xbutton.state)) {
 406                         ttysend(ms->s, strlen(ms->s));
 407                         return;
 408                 }
 409         }
 410
 411         if (e->xbutton.button == Button1) {
 412                 clock_gettime(CLOCK_MONOTONIC, &now);
 413
 414                 /* Clear previous selection, logically and visually. */
 415                 selclear_(NULL);
 416                 sel.mode = SEL_EMPTY;
 417                 sel.type = SEL_REGULAR;
 418                 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
 419                 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
 420
 421                 /*
 422                  * If the user clicks below predefined timeouts specific
 423                  * snapping behaviour is exposed.
 424                  */
 425                 if (TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
 426                         sel.snap = SNAP_LINE;
 427                 } else if (TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
 428                         sel.snap = SNAP_WORD;
 429                 } else {
 430                         sel.snap = 0;
 431                 }
 432                 selnormalize();
 433
 434                 if (sel.snap != 0)
 435                         sel.mode = SEL_READY;
 436                 tsetdirt(sel.nb.y, sel.ne.y);
 437                 sel.tclick2 = sel.tclick1;
 438                 sel.tclick1 = now;
 439         }
 440 }
 441
 442 void
 443 selcopy(Time t)
 444 {
 445         xsetsel(getsel(), t);
 446 }
 447
 448 void
 449 propnotify(XEvent *e)
 450 {
 451         XPropertyEvent *xpev;
 452         Atom clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 453
 454         xpev = &e->xproperty;
 455         if (xpev->state == PropertyNewValue &&
 456                         (xpev->atom == XA_PRIMARY ||
 457                          xpev->atom == clipboard)) {
 458                 selnotify(e);
 459         }
 460 }
 461
 462 void
 463 selnotify(XEvent *e)
 464 {
 465         ulong nitems, ofs, rem;
 466         int format;
 467         uchar *data, *last, *repl;
 468         Atom type, incratom, property;
 469
 470         incratom = XInternAtom(xw.dpy, "INCR", 0);
 471
 472         ofs = 0;
 473         if (e->type == SelectionNotify) {
 474                 property = e->xselection.property;
 475         } else if(e->type == PropertyNotify) {
 476                 property = e->xproperty.atom;
 477         } else {
 478                 return;
 479         }
 480         if (property == None)
 481                 return;
 482
 483         do {
 484                 if (XGetWindowProperty(xw.dpy, xw.win, property, ofs,
 485                                         BUFSIZ/4, False, AnyPropertyType,
 486                                         &type, &format, &nitems, &rem,
 487                                         &data)) {
 488                         fprintf(stderr, "Clipboard allocation failed\n");
 489                         return;
 490                 }
 491
 492                 if (e->type == PropertyNotify && nitems == 0 && rem == 0) {
 493                         /*
 494                          * If there is some PropertyNotify with no data, then
 495                          * this is the signal of the selection owner that all
 496                          * data has been transferred. We won't need to receive
 497                          * PropertyNotify events anymore.
 498                          */
 499                         MODBIT(xw.attrs.event_mask, 0, PropertyChangeMask);
 500                         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
 501                                         &xw.attrs);
 502                 }
 503
 504                 if (type == incratom) {
 505                         /*
 506                          * Activate the PropertyNotify events so we receive
 507                          * when the selection owner does send us the next
 508                          * chunk of data.
 509                          */
 510                         MODBIT(xw.attrs.event_mask, 1, PropertyChangeMask);
 511                         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
 512                                         &xw.attrs);
 513
 514                         /*
 515                          * Deleting the property is the transfer start signal.
 516                          */
 517                         XDeleteProperty(xw.dpy, xw.win, (int)property);
 518                         continue;
 519                 }
 520
 521                 /*
 522                  * As seen in getsel:
 523                  * Line endings are inconsistent in the terminal and GUI world
 524                  * copy and pasting. When receiving some selection data,
 525                  * replace all '\n' with '\r'.
 526                  * FIXME: Fix the computer world.
 527                  */
 528                 repl = data;
 529                 last = data + nitems * format / 8;
 530                 while ((repl = memchr(repl, '\n', last - repl))) {
 531                         *repl++ = '\r';
 532                 }
 533
 534                 if (IS_SET(MODE_BRCKTPASTE) && ofs == 0)
 535                         ttywrite("\033[200~", 6);
 536                 ttysend((char *)data, nitems * format / 8);
 537                 if (IS_SET(MODE_BRCKTPASTE) && rem == 0)
 538                         ttywrite("\033[201~", 6);
 539                 XFree(data);
 540                 /* number of 32-bit chunks returned */
 541                 ofs += nitems * format / 32;
 542         } while (rem > 0);
 543
 544         /*
 545          * Deleting the property again tells the selection owner to send the
 546          * next data chunk in the property.
 547          */
 548         XDeleteProperty(xw.dpy, xw.win, (int)property);
 549 }
 550
 551 void
 552 xclipcopy(void)
 553 {
 554         clipcopy(NULL);
 555 }
 556
 557 void
 558 selclear_(XEvent *e)
 559 {
 560         selclear();
 561 }
 562
 563 void
 564 selrequest(XEvent *e)
 565 {
 566         XSelectionRequestEvent *xsre;
 567         XSelectionEvent xev;
 568         Atom xa_targets, string, clipboard;
 569         char *seltext;
 570
 571         xsre = (XSelectionRequestEvent *) e;
 572         xev.type = SelectionNotify;
 573         xev.requestor = xsre->requestor;
 574         xev.selection = xsre->selection;
 575         xev.target = xsre->target;
 576         xev.time = xsre->time;
 577         if (xsre->property == None)
 578                 xsre->property = xsre->target;
 579
 580         /* reject */
 581         xev.property = None;
 582
 583         xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
 584         if (xsre->target == xa_targets) {
 585                 /* respond with the supported type */
 586                 string = xsel.xtarget;
 587                 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
 588                                 XA_ATOM, 32, PropModeReplace,
 589                                 (uchar *) &string, 1);
 590                 xev.property = xsre->property;
 591         } else if (xsre->target == xsel.xtarget || xsre->target == XA_STRING) {
 592                 /*
 593                  * xith XA_STRING non ascii characters may be incorrect in the
 594                  * requestor. It is not our problem, use utf8.
 595                  */
 596                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 597                 if (xsre->selection == XA_PRIMARY) {
 598                         seltext = sel.primary;
 599                 } else if (xsre->selection == clipboard) {
 600                         seltext = sel.clipboard;
 601                 } else {
 602                         fprintf(stderr,
 603                                 "Unhandled clipboard selection 0x%lx\n",
 604                                 xsre->selection);
 605                         return;
 606                 }
 607                 if (seltext != NULL) {
 608                         XChangeProperty(xsre->display, xsre->requestor,
 609                                         xsre->property, xsre->target,
 610                                         8, PropModeReplace,
 611                                         (uchar *)seltext, strlen(seltext));
 612                         xev.property = xsre->property;
 613                 }
 614         }
 615
 616         /* all done, send a notification to the listener */
 617         if (!XSendEvent(xsre->display, xsre->requestor, 1, 0, (XEvent *) &xev))
 618                 fprintf(stderr, "Error sending SelectionNotify event\n");
 619 }
 620
 621 void
 622 xsetsel(char *str, Time t)
 623 {
 624         free(sel.primary);
 625         sel.primary = str;
 626
 627         XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
 628         if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
 629                 selclear_(NULL);
 630 }
 631
 632 void
 633 brelease(XEvent *e)
 634 {
 635         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 636                 mousereport(e);
 637                 return;
 638         }
 639
 640         if (e->xbutton.button == Button2) {
 641                 selpaste(NULL);
 642         } else if (e->xbutton.button == Button1) {
 643                 if (sel.mode == SEL_READY) {
 644                         getbuttoninfo(e);
 645                         selcopy(e->xbutton.time);
 646                 } else
 647                         selclear_(NULL);
 648                 sel.mode = SEL_IDLE;
 649                 tsetdirt(sel.nb.y, sel.ne.y);
 650         }
 651 }
 652
 653 void
 654 bmotion(XEvent *e)
 655 {
 656         int oldey, oldex, oldsby, oldsey;
 657
 658         if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 659                 mousereport(e);
 660                 return;
 661         }
 662
 663         if (!sel.mode)
 664                 return;
 665
 666         sel.mode = SEL_READY;
 667         oldey = sel.oe.y;
 668         oldex = sel.oe.x;
 669         oldsby = sel.nb.y;
 670         oldsey = sel.ne.y;
 671         getbuttoninfo(e);
 672
 673         if (oldey != sel.oe.y || oldex != sel.oe.x)
 674                 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
 675 }
 676
 677 void
 678 cresize(int width, int height)
 679 {
 680         int col, row;
 681
 682         if (width != 0)
 683                 win.w = width;
 684         if (height != 0)
 685                 win.h = height;
 686
 687         col = (win.w - 2 * borderpx) / win.cw;
 688         row = (win.h - 2 * borderpx) / win.ch;
 689
 690         tresize(col, row);
 691         xresize(col, row);
 692 }
 693
 694 void
 695 xresize(int col, int row)
 696 {
 697         win.tw = MAX(1, col * win.cw);
 698         win.th = MAX(1, row * win.ch);
 699
 700         XFreePixmap(xw.dpy, xw.buf);
 701         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
 702                         DefaultDepth(xw.dpy, xw.scr));
 703         XftDrawChange(xw.draw, xw.buf);
 704         xclear(0, 0, win.w, win.h);
 705
 706         /* resize to new width */
 707         xw.specbuf = xrealloc(xw.specbuf, col * sizeof(GlyphFontSpec));
 708 }
 709
 710 ushort
 711 sixd_to_16bit(int x)
 712 {
 713         return x == 0 ? 0 : 0x3737 + 0x2828 * x;
 714 }
 715
 716 int
 717 xloadcolor(int i, const char *name, Color *ncolor)
 718 {
 719         XRenderColor color = { .alpha = 0xffff };
 720
 721         if (!name) {
 722                 if (BETWEEN(i, 16, 255)) { /* 256 color */
 723                         if (i < 6*6*6+16) { /* same colors as xterm */
 724                                 color.red   = sixd_to_16bit( ((i-16)/36)%6 );
 725                                 color.green = sixd_to_16bit( ((i-16)/6) %6 );
 726                                 color.blue  = sixd_to_16bit( ((i-16)/1) %6 );
 727                         } else { /* greyscale */
 728                                 color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
 729                                 color.green = color.blue = color.red;
 730                         }
 731                         return XftColorAllocValue(xw.dpy, xw.vis,
 732                                                   xw.cmap, &color, ncolor);
 733                 } else
 734                         name = colorname[i];
 735         }
 736
 737         return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
 738 }
 739
 740 void
 741 xloadcols(void)
 742 {
 743         int i;
 744         static int loaded;
 745         Color *cp;
 746
 747         dc.collen = MAX(LEN(colorname), 256);
 748         dc.col = xmalloc(dc.collen * sizeof(Color));
 749
 750         if (loaded) {
 751                 for (cp = dc.col; cp < &dc.col[dc.collen]; ++cp)
 752                         XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
 753         }
 754
 755         for (i = 0; i < dc.collen; i++)
 756                 if (!xloadcolor(i, NULL, &dc.col[i])) {
 757                         if (colorname[i])
 758                                 die("Could not allocate color '%s'\n", colorname[i]);
 759                         else
 760                                 die("Could not allocate color %d\n", i);
 761                 }
 762         loaded = 1;
 763 }
 764
 765 int
 766 xsetcolorname(int x, const char *name)
 767 {
 768         Color ncolor;
 769
 770         if (!BETWEEN(x, 0, dc.collen))
 771                 return 1;
 772
 773
 774         if (!xloadcolor(x, name, &ncolor))
 775                 return 1;
 776
 777         XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
 778         dc.col[x] = ncolor;
 779
 780         return 0;
 781 }
 782
 783 /*
 784  * Absolute coordinates.
 785  */
 786 void
 787 xclear(int x1, int y1, int x2, int y2)
 788 {
 789         XftDrawRect(xw.draw,
 790                         &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
 791                         x1, y1, x2-x1, y2-y1);
 792 }
 793
 794 void
 795 xhints(void)
 796 {
 797         XClassHint class = {opt_name ? opt_name : termname,
 798                             opt_class ? opt_class : termname};
 799         XWMHints wm = {.flags = InputHint, .input = 1};
 800         XSizeHints *sizeh = NULL;
 801
 802         sizeh = XAllocSizeHints();
 803
 804         sizeh->flags = PSize | PResizeInc | PBaseSize;
 805         sizeh->height = win.h;
 806         sizeh->width = win.w;
 807         sizeh->height_inc = win.ch;
 808         sizeh->width_inc = win.cw;
 809         sizeh->base_height = 2 * borderpx;
 810         sizeh->base_width = 2 * borderpx;
 811         if (xw.isfixed) {
 812                 sizeh->flags |= PMaxSize | PMinSize;
 813                 sizeh->min_width = sizeh->max_width = win.w;
 814                 sizeh->min_height = sizeh->max_height = win.h;
 815         }
 816         if (xw.gm & (XValue|YValue)) {
 817                 sizeh->flags |= USPosition | PWinGravity;
 818                 sizeh->x = xw.l;
 819                 sizeh->y = xw.t;
 820                 sizeh->win_gravity = xgeommasktogravity(xw.gm);
 821         }
 822
 823         XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
 824                         &class);
 825         XFree(sizeh);
 826 }
 827
 828 int
 829 xgeommasktogravity(int mask)
 830 {
 831         switch (mask & (XNegative|YNegative)) {
 832         case 0:
 833                 return NorthWestGravity;
 834         case XNegative:
 835                 return NorthEastGravity;
 836         case YNegative:
 837                 return SouthWestGravity;
 838         }
 839
 840         return SouthEastGravity;
 841 }
 842
 843 int
 844 xloadfont(Font *f, FcPattern *pattern)
 845 {
 846         FcPattern *configured;
 847         FcPattern *match;
 848         FcResult result;
 849         XGlyphInfo extents;
 850         int wantattr, haveattr;
 851
 852         /*
 853          * Manually configure instead of calling XftMatchFont
 854          * so that we can use the configured pattern for
 855          * "missing glyph" lookups.
 856          */
 857         configured = FcPatternDuplicate(pattern);
 858         if (!configured)
 859                 return 1;
 860
 861         FcConfigSubstitute(NULL, configured, FcMatchPattern);
 862         XftDefaultSubstitute(xw.dpy, xw.scr, configured);
 863
 864         match = FcFontMatch(NULL, configured, &result);
 865         if (!match) {
 866                 FcPatternDestroy(configured);
 867                 return 1;
 868         }
 869
 870         if (!(f->match = XftFontOpenPattern(xw.dpy, match))) {
 871                 FcPatternDestroy(configured);
 872                 FcPatternDestroy(match);
 873                 return 1;
 874         }
 875
 876         if ((XftPatternGetInteger(pattern, "slant", 0, &wantattr) ==
 877             XftResultMatch)) {
 878                 /*
 879                  * Check if xft was unable to find a font with the appropriate
 880                  * slant but gave us one anyway. Try to mitigate.
 881                  */
 882                 if ((XftPatternGetInteger(f->match->pattern, "slant", 0,
 883                     &haveattr) != XftResultMatch) || haveattr < wantattr) {
 884                         f->badslant = 1;
 885                         fputs("st: font slant does not match\n", stderr);
 886                 }
 887         }
 888
 889         if ((XftPatternGetInteger(pattern, "weight", 0, &wantattr) ==
 890             XftResultMatch)) {
 891                 if ((XftPatternGetInteger(f->match->pattern, "weight", 0,
 892                     &haveattr) != XftResultMatch) || haveattr != wantattr) {
 893                         f->badweight = 1;
 894                         fputs("st: font weight does not match\n", stderr);
 895                 }
 896         }
 897
 898         XftTextExtentsUtf8(xw.dpy, f->match,
 899                 (const FcChar8 *) ascii_printable,
 900                 strlen(ascii_printable), &extents);
 901
 902         f->set = NULL;
 903         f->pattern = configured;
 904
 905         f->ascent = f->match->ascent;
 906         f->descent = f->match->descent;
 907         f->lbearing = 0;
 908         f->rbearing = f->match->max_advance_width;
 909
 910         f->height = f->ascent + f->descent;
 911         f->width = DIVCEIL(extents.xOff, strlen(ascii_printable));
 912
 913         return 0;
 914 }
 915
 916 void
 917 xloadfonts(char *fontstr, double fontsize)
 918 {
 919         FcPattern *pattern;
 920         double fontval;
 921         float ceilf(float);
 922
 923         if (fontstr[0] == '-') {
 924                 pattern = XftXlfdParse(fontstr, False, False);
 925         } else {
 926                 pattern = FcNameParse((FcChar8 *)fontstr);
 927         }
 928
 929         if (!pattern)
 930                 die("st: can't open font %s\n", fontstr);
 931
 932         if (fontsize > 1) {
 933                 FcPatternDel(pattern, FC_PIXEL_SIZE);
 934                 FcPatternDel(pattern, FC_SIZE);
 935                 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
 936                 usedfontsize = fontsize;
 937         } else {
 938                 if (FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval) ==
 939                                 FcResultMatch) {
 940                         usedfontsize = fontval;
 941                 } else if (FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval) ==
 942                                 FcResultMatch) {
 943                         usedfontsize = -1;
 944                 } else {
 945                         /*
 946                          * Default font size is 12, if none given. This is to
 947                          * have a known usedfontsize value.
 948                          */
 949                         FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
 950                         usedfontsize = 12;
 951                 }
 952                 defaultfontsize = usedfontsize;
 953         }
 954
 955         if (xloadfont(&dc.font, pattern))
 956                 die("st: can't open font %s\n", fontstr);
 957
 958         if (usedfontsize < 0) {
 959                 FcPatternGetDouble(dc.font.match->pattern,
 960                                    FC_PIXEL_SIZE, 0, &fontval);
 961                 usedfontsize = fontval;
 962                 if (fontsize == 0)
 963                         defaultfontsize = fontval;
 964         }
 965
 966         /* Setting character width and height. */
 967         win.cw = ceilf(dc.font.width * cwscale);
 968         win.ch = ceilf(dc.font.height * chscale);
 969
 970         FcPatternDel(pattern, FC_SLANT);
 971         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
 972         if (xloadfont(&dc.ifont, pattern))
 973                 die("st: can't open font %s\n", fontstr);
 974
 975         FcPatternDel(pattern, FC_WEIGHT);
 976         FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
 977         if (xloadfont(&dc.ibfont, pattern))
 978                 die("st: can't open font %s\n", fontstr);
 979
 980         FcPatternDel(pattern, FC_SLANT);
 981         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
 982         if (xloadfont(&dc.bfont, pattern))
 983                 die("st: can't open font %s\n", fontstr);
 984
 985         FcPatternDestroy(pattern);
 986 }
 987
 988 void
 989 xunloadfont(Font *f)
 990 {
 991         XftFontClose(xw.dpy, f->match);
 992         FcPatternDestroy(f->pattern);
 993         if (f->set)
 994                 FcFontSetDestroy(f->set);
 995 }
 996
 997 void
 998 xunloadfonts(void)
 999 {
1000         /* Free the loaded fonts in the font cache.  */
1001         while (frclen > 0)
1002                 XftFontClose(xw.dpy, frc[--frclen].font);
1003
1004         xunloadfont(&dc.font);
1005         xunloadfont(&dc.bfont);
1006         xunloadfont(&dc.ifont);
1007         xunloadfont(&dc.ibfont);
1008 }
1009
1010 void
1011 xinit(void)
1012 {
1013         XGCValues gcvalues;
1014         Cursor cursor;
1015         Window parent;
1016         pid_t thispid = getpid();
1017         XColor xmousefg, xmousebg;
1018
1019         if (!(xw.dpy = XOpenDisplay(NULL)))
1020                 die("Can't open display\n");
1021         xw.scr = XDefaultScreen(xw.dpy);
1022         xw.vis = XDefaultVisual(xw.dpy, xw.scr);
1023
1024         /* font */
1025         if (!FcInit())
1026                 die("Could not init fontconfig.\n");
1027
1028         usedfont = (opt_font == NULL)? font : opt_font;
1029         xloadfonts(usedfont, 0);
1030
1031         /* colors */
1032         xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1033         xloadcols();
1034
1035         /* adjust fixed window geometry */
1036         win.w = 2 * borderpx + term.col * win.cw;
1037         win.h = 2 * borderpx + term.row * win.ch;
1038         if (xw.gm & XNegative)
1039                 xw.l += DisplayWidth(xw.dpy, xw.scr) - win.w - 2;
1040         if (xw.gm & YNegative)
1041                 xw.t += DisplayHeight(xw.dpy, xw.scr) - win.h - 2;
1042
1043         /* Events */
1044         xw.attrs.background_pixel = dc.col[defaultbg].pixel;
1045         xw.attrs.border_pixel = dc.col[defaultbg].pixel;
1046         xw.attrs.bit_gravity = NorthWestGravity;
1047         xw.attrs.event_mask = FocusChangeMask | KeyPressMask
1048                 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1049                 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
1050         xw.attrs.colormap = xw.cmap;
1051
1052         if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
1053                 parent = XRootWindow(xw.dpy, xw.scr);
1054         xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
1055                         win.w, win.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
1056                         xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
1057                         | CWEventMask | CWColormap, &xw.attrs);
1058
1059         memset(&gcvalues, 0, sizeof(gcvalues));
1060         gcvalues.graphics_exposures = False;
1061         dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
1062                         &gcvalues);
1063         xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
1064                         DefaultDepth(xw.dpy, xw.scr));
1065         XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
1066         XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, win.w, win.h);
1067
1068         /* font spec buffer */
1069         xw.specbuf = xmalloc(term.col * sizeof(GlyphFontSpec));
1070
1071         /* Xft rendering context */
1072         xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
1073
1074         /* input methods */
1075         if ((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
1076                 XSetLocaleModifiers("@im=local");
1077                 if ((xw.xim =  XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
1078                         XSetLocaleModifiers("@im=");
1079                         if ((xw.xim = XOpenIM(xw.dpy,
1080                                         NULL, NULL, NULL)) == NULL) {
1081                                 die("XOpenIM failed. Could not open input"
1082                                         " device.\n");
1083                         }
1084                 }
1085         }
1086         xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
1087                                            | XIMStatusNothing, XNClientWindow, xw.win,
1088                                            XNFocusWindow, xw.win, NULL);
1089         if (xw.xic == NULL)
1090                 die("XCreateIC failed. Could not obtain input method.\n");
1091
1092         /* white cursor, black outline */
1093         cursor = XCreateFontCursor(xw.dpy, mouseshape);
1094         XDefineCursor(xw.dpy, xw.win, cursor);
1095
1096         if (XParseColor(xw.dpy, xw.cmap, colorname[mousefg], &xmousefg) == 0) {
1097                 xmousefg.red   = 0xffff;
1098                 xmousefg.green = 0xffff;
1099                 xmousefg.blue  = 0xffff;
1100         }
1101
1102         if (XParseColor(xw.dpy, xw.cmap, colorname[mousebg], &xmousebg) == 0) {
1103                 xmousebg.red   = 0x0000;
1104                 xmousebg.green = 0x0000;
1105                 xmousebg.blue  = 0x0000;
1106         }
1107
1108         XRecolorCursor(xw.dpy, cursor, &xmousefg, &xmousebg);
1109
1110         xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
1111         xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
1112         xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
1113         XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
1114
1115         xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
1116         XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
1117                         PropModeReplace, (uchar *)&thispid, 1);
1118
1119         resettitle();
1120         XMapWindow(xw.dpy, xw.win);
1121         xhints();
1122         XSync(xw.dpy, False);
1123
1124         xsel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
1125         if (xsel.xtarget == None)
1126                 xsel.xtarget = XA_STRING;
1127 }
1128
1129 int
1130 xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x, int y)
1131 {
1132         float winx = borderpx + x * win.cw, winy = borderpx + y * win.ch, xp, yp;
1133         ushort mode, prevmode = USHRT_MAX;
1134         Font *font = &dc.font;
1135         int frcflags = FRC_NORMAL;
1136         float runewidth = win.cw;
1137         Rune rune;
1138         FT_UInt glyphidx;
1139         FcResult fcres;
1140         FcPattern *fcpattern, *fontpattern;
1141         FcFontSet *fcsets[] = { NULL };
1142         FcCharSet *fccharset;
1143         int i, f, numspecs = 0;
1144
1145         for (i = 0, xp = winx, yp = winy + font->ascent; i < len; ++i) {
1146                 /* Fetch rune and mode for current glyph. */
1147                 rune = glyphs[i].u;
1148                 mode = glyphs[i].mode;
1149
1150                 /* Skip dummy wide-character spacing. */
1151                 if (mode == ATTR_WDUMMY)
1152                         continue;
1153
1154                 /* Determine font for glyph if different from previous glyph. */
1155                 if (prevmode != mode) {
1156                         prevmode = mode;
1157                         font = &dc.font;
1158                         frcflags = FRC_NORMAL;
1159                         runewidth = win.cw * ((mode & ATTR_WIDE) ? 2.0f : 1.0f);
1160                         if ((mode & ATTR_ITALIC) && (mode & ATTR_BOLD)) {
1161                                 font = &dc.ibfont;
1162                                 frcflags = FRC_ITALICBOLD;
1163                         } else if (mode & ATTR_ITALIC) {
1164                                 font = &dc.ifont;
1165                                 frcflags = FRC_ITALIC;
1166                         } else if (mode & ATTR_BOLD) {
1167                                 font = &dc.bfont;
1168                                 frcflags = FRC_BOLD;
1169                         }
1170                         yp = winy + font->ascent;
1171                 }
1172
1173                 /* Lookup character index with default font. */
1174                 glyphidx = XftCharIndex(xw.dpy, font->match, rune);
1175                 if (glyphidx) {
1176                         specs[numspecs].font = font->match;
1177                         specs[numspecs].glyph = glyphidx;
1178                         specs[numspecs].x = (short)xp;
1179                         specs[numspecs].y = (short)yp;
1180                         xp += runewidth;
1181                         numspecs++;
1182                         continue;
1183                 }
1184
1185                 /* Fallback on font cache, search the font cache for match. */
1186                 for (f = 0; f < frclen; f++) {
1187                         glyphidx = XftCharIndex(xw.dpy, frc[f].font, rune);
1188                         /* Everything correct. */
1189                         if (glyphidx && frc[f].flags == frcflags)
1190                                 break;
1191                         /* We got a default font for a not found glyph. */
1192                         if (!glyphidx && frc[f].flags == frcflags
1193                                         && frc[f].unicodep == rune) {
1194                                 break;
1195                         }
1196                 }
1197
1198                 /* Nothing was found. Use fontconfig to find matching font. */
1199                 if (f >= frclen) {
1200                         if (!font->set)
1201                                 font->set = FcFontSort(0, font->pattern,
1202                                                        1, 0, &fcres);
1203                         fcsets[0] = font->set;
1204
1205                         /*
1206                          * Nothing was found in the cache. Now use
1207                          * some dozen of Fontconfig calls to get the
1208                          * font for one single character.
1209                          *
1210                          * Xft and fontconfig are design failures.
1211                          */
1212                         fcpattern = FcPatternDuplicate(font->pattern);
1213                         fccharset = FcCharSetCreate();
1214
1215                         FcCharSetAddChar(fccharset, rune);
1216                         FcPatternAddCharSet(fcpattern, FC_CHARSET,
1217                                         fccharset);
1218                         FcPatternAddBool(fcpattern, FC_SCALABLE, 1);
1219
1220                         FcConfigSubstitute(0, fcpattern,
1221                                         FcMatchPattern);
1222                         FcDefaultSubstitute(fcpattern);
1223
1224                         fontpattern = FcFontSetMatch(0, fcsets, 1,
1225                                         fcpattern, &fcres);
1226
1227                         /*
1228                          * Overwrite or create the new cache entry.
1229                          */
1230                         if (frclen >= LEN(frc)) {
1231                                 frclen = LEN(frc) - 1;
1232                                 XftFontClose(xw.dpy, frc[frclen].font);
1233                                 frc[frclen].unicodep = 0;
1234                         }
1235
1236                         frc[frclen].font = XftFontOpenPattern(xw.dpy,
1237                                         fontpattern);
1238                         if (!frc[frclen].font)
1239                                 die("XftFontOpenPattern failed seeking fallback font: %s\n",
1240                                         strerror(errno));
1241                         frc[frclen].flags = frcflags;
1242                         frc[frclen].unicodep = rune;
1243
1244                         glyphidx = XftCharIndex(xw.dpy, frc[frclen].font, rune);
1245
1246                         f = frclen;
1247                         frclen++;
1248
1249                         FcPatternDestroy(fcpattern);
1250                         FcCharSetDestroy(fccharset);
1251                 }
1252
1253                 specs[numspecs].font = frc[f].font;
1254                 specs[numspecs].glyph = glyphidx;
1255                 specs[numspecs].x = (short)xp;
1256                 specs[numspecs].y = (short)yp;
1257                 xp += runewidth;
1258                 numspecs++;
1259         }
1260
1261         return numspecs;
1262 }
1263
1264 void
1265 xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, int y)
1266 {
1267         int charlen = len * ((base.mode & ATTR_WIDE) ? 2 : 1);
1268         int winx = borderpx + x * win.cw, winy = borderpx + y * win.ch,
1269             width = charlen * win.cw;
1270         Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
1271         XRenderColor colfg, colbg;
1272         XRectangle r;
1273
1274         /* Fallback on color display for attributes not supported by the font */
1275         if (base.mode & ATTR_ITALIC && base.mode & ATTR_BOLD) {
1276                 if (dc.ibfont.badslant || dc.ibfont.badweight)
1277                         base.fg = defaultattr;
1278         } else if ((base.mode & ATTR_ITALIC && dc.ifont.badslant) ||
1279             (base.mode & ATTR_BOLD && dc.bfont.badweight)) {
1280                 base.fg = defaultattr;
1281         }
1282
1283         if (IS_TRUECOL(base.fg)) {
1284                 colfg.alpha = 0xffff;
1285                 colfg.red = TRUERED(base.fg);
1286                 colfg.green = TRUEGREEN(base.fg);
1287                 colfg.blue = TRUEBLUE(base.fg);
1288                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
1289                 fg = &truefg;
1290         } else {
1291                 fg = &dc.col[base.fg];
1292         }
1293
1294         if (IS_TRUECOL(base.bg)) {
1295                 colbg.alpha = 0xffff;
1296                 colbg.green = TRUEGREEN(base.bg);
1297                 colbg.red = TRUERED(base.bg);
1298                 colbg.blue = TRUEBLUE(base.bg);
1299                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
1300                 bg = &truebg;
1301         } else {
1302                 bg = &dc.col[base.bg];
1303         }
1304
1305         /* Change basic system colors [0-7] to bright system colors [8-15] */
1306         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_BOLD && BETWEEN(base.fg, 0, 7))
1307                 fg = &dc.col[base.fg + 8];
1308
1309         if (IS_SET(MODE_REVERSE)) {
1310                 if (fg == &dc.col[defaultfg]) {
1311                         fg = &dc.col[defaultbg];
1312                 } else {
1313                         colfg.red = ~fg->color.red;
1314                         colfg.green = ~fg->color.green;
1315                         colfg.blue = ~fg->color.blue;
1316                         colfg.alpha = fg->color.alpha;
1317                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
1318                                         &revfg);
1319                         fg = &revfg;
1320                 }
1321
1322                 if (bg == &dc.col[defaultbg]) {
1323                         bg = &dc.col[defaultfg];
1324                 } else {
1325                         colbg.red = ~bg->color.red;
1326                         colbg.green = ~bg->color.green;
1327                         colbg.blue = ~bg->color.blue;
1328                         colbg.alpha = bg->color.alpha;
1329                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
1330                                         &revbg);
1331                         bg = &revbg;
1332                 }
1333         }
1334
1335         if ((base.mode & ATTR_BOLD_FAINT) == ATTR_FAINT) {
1336                 colfg.red = fg->color.red / 2;
1337                 colfg.green = fg->color.green / 2;
1338                 colfg.blue = fg->color.blue / 2;
1339                 colfg.alpha = fg->color.alpha;
1340                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
1341                 fg = &revfg;
1342         }
1343
1344
1345         if (base.mode & ATTR_REVERSE) {
1346                 temp = fg;
1347                 fg = bg;
1348                 bg = temp;
1349         }
1350
1351         if (base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
1352                 fg = bg;
1353
1354         if (base.mode & ATTR_INVISIBLE)
1355                 fg = bg;
1356
1357         /* Intelligent cleaning up of the borders. */
1358         if (x == 0) {
1359                 xclear(0, (y == 0)? 0 : winy, borderpx,
1360                         winy + win.ch + ((y >= term.row-1)? win.h : 0));
1361         }
1362         if (x + charlen >= term.col) {
1363                 xclear(winx + width, (y == 0)? 0 : winy, win.w,
1364                         ((y >= term.row-1)? win.h : (winy + win.ch)));
1365         }
1366         if (y == 0)
1367                 xclear(winx, 0, winx + width, borderpx);
1368         if (y == term.row-1)
1369                 xclear(winx, winy + win.ch, winx + width, win.h);
1370
1371         /* Clean up the region we want to draw to. */
1372         XftDrawRect(xw.draw, bg, winx, winy, width, win.ch);
1373
1374         /* Set the clip region because Xft is sometimes dirty. */
1375         r.x = 0;
1376         r.y = 0;
1377         r.height = win.ch;
1378         r.width = width;
1379         XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
1380
1381         /* Render the glyphs. */
1382         XftDrawGlyphFontSpec(xw.draw, fg, specs, len);
1383
1384         /* Render underline and strikethrough. */
1385         if (base.mode & ATTR_UNDERLINE) {
1386                 XftDrawRect(xw.draw, fg, winx, winy + dc.font.ascent + 1,
1387                                 width, 1);
1388         }
1389
1390         if (base.mode & ATTR_STRUCK) {
1391                 XftDrawRect(xw.draw, fg, winx, winy + 2 * dc.font.ascent / 3,
1392                                 width, 1);
1393         }
1394
1395         /* Reset clip to none. */
1396         XftDrawSetClip(xw.draw, 0);
1397 }
1398
1399 void
1400 xdrawglyph(Glyph g, int x, int y)
1401 {
1402         int numspecs;
1403         XftGlyphFontSpec spec;
1404
1405         numspecs = xmakeglyphfontspecs(&spec, &g, 1, x, y);
1406         xdrawglyphfontspecs(&spec, g, numspecs, x, y);
1407 }
1408
1409 void
1410 xdrawcursor(void)
1411 {
1412         static int oldx = 0, oldy = 0;
1413         int curx;
1414         Glyph g = {' ', ATTR_NULL, defaultbg, defaultcs}, og;
1415         int ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
1416         Color drawcol;
1417
1418         LIMIT(oldx, 0, term.col-1);
1419         LIMIT(oldy, 0, term.row-1);
1420
1421         curx = term.c.x;
1422
1423         /* adjust position if in dummy */
1424         if (term.line[oldy][oldx].mode & ATTR_WDUMMY)
1425                 oldx--;
1426         if (term.line[term.c.y][curx].mode & ATTR_WDUMMY)
1427                 curx--;
1428
1429         /* remove the old cursor */
1430         og = term.line[oldy][oldx];
1431         if (ena_sel && selected(oldx, oldy))
1432                 og.mode ^= ATTR_REVERSE;
1433         xdrawglyph(og, oldx, oldy);
1434
1435         g.u = term.line[term.c.y][term.c.x].u;
1436         g.mode |= term.line[term.c.y][term.c.x].mode &
1437                   (ATTR_BOLD | ATTR_ITALIC | ATTR_UNDERLINE | ATTR_STRUCK);
1438
1439         /*
1440          * Select the right color for the right mode.
1441          */
1442         if (IS_SET(MODE_REVERSE)) {
1443                 g.mode |= ATTR_REVERSE;
1444                 g.bg = defaultfg;
1445                 if (ena_sel && selected(term.c.x, term.c.y)) {
1446                         drawcol = dc.col[defaultcs];
1447                         g.fg = defaultrcs;
1448                 } else {
1449                         drawcol = dc.col[defaultrcs];
1450                         g.fg = defaultcs;
1451                 }
1452         } else {
1453                 if (ena_sel && selected(term.c.x, term.c.y)) {
1454                         drawcol = dc.col[defaultrcs];
1455                         g.fg = defaultfg;
1456                         g.bg = defaultrcs;
1457                 } else {
1458                         drawcol = dc.col[defaultcs];
1459                 }
1460         }
1461
1462         if (IS_SET(MODE_HIDE))
1463                 return;
1464
1465         /* draw the new one */
1466         if (win.state & WIN_FOCUSED) {
1467                 switch (win.cursor) {
1468                 case 7: /* st extension: snowman */
1469                         utf8decode("☃", &g.u, UTF_SIZ);
1470                 case 0: /* Blinking Block */
1471                 case 1: /* Blinking Block (Default) */
1472                 case 2: /* Steady Block */
1473                         g.mode |= term.line[term.c.y][curx].mode & ATTR_WIDE;
1474                         xdrawglyph(g, term.c.x, term.c.y);
1475                         break;
1476                 case 3: /* Blinking Underline */
1477                 case 4: /* Steady Underline */
1478                         XftDrawRect(xw.draw, &drawcol,
1479                                         borderpx + curx * win.cw,
1480                                         borderpx + (term.c.y + 1) * win.ch - \
1481                                                 cursorthickness,
1482                                         win.cw, cursorthickness);
1483                         break;
1484                 case 5: /* Blinking bar */
1485                 case 6: /* Steady bar */
1486                         XftDrawRect(xw.draw, &drawcol,
1487                                         borderpx + curx * win.cw,
1488                                         borderpx + term.c.y * win.ch,
1489                                         cursorthickness, win.ch);
1490                         break;
1491                 }
1492         } else {
1493                 XftDrawRect(xw.draw, &drawcol,
1494                                 borderpx + curx * win.cw,
1495                                 borderpx + term.c.y * win.ch,
1496                                 win.cw - 1, 1);
1497                 XftDrawRect(xw.draw, &drawcol,
1498                                 borderpx + curx * win.cw,
1499                                 borderpx + term.c.y * win.ch,
1500                                 1, win.ch - 1);
1501                 XftDrawRect(xw.draw, &drawcol,
1502                                 borderpx + (curx + 1) * win.cw - 1,
1503                                 borderpx + term.c.y * win.ch,
1504                                 1, win.ch - 1);
1505                 XftDrawRect(xw.draw, &drawcol,
1506                                 borderpx + curx * win.cw,
1507                                 borderpx + (term.c.y + 1) * win.ch - 1,
1508                                 win.cw, 1);
1509         }
1510         oldx = curx, oldy = term.c.y;
1511 }
1512
1513 void
1514 xsetenv(void)
1515 {
1516         char buf[sizeof(long) * 8 + 1];
1517
1518         snprintf(buf, sizeof(buf), "%lu", xw.win);
1519         setenv("WINDOWID", buf, 1);
1520 }
1521
1522 void
1523 xsettitle(char *p)
1524 {
1525         XTextProperty prop;
1526         DEFAULT(p, "st");
1527
1528         Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
1529                         &prop);
1530         XSetWMName(xw.dpy, xw.win, &prop);
1531         XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
1532         XFree(prop.value);
1533 }
1534
1535 void
1536 draw(void)
1537 {
1538         drawregion(0, 0, term.col, term.row);
1539         XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, win.w,
1540                         win.h, 0, 0);
1541         XSetForeground(xw.dpy, dc.gc,
1542                         dc.col[IS_SET(MODE_REVERSE)?
1543                                 defaultfg : defaultbg].pixel);
1544 }
1545
1546 void
1547 drawregion(int x1, int y1, int x2, int y2)
1548 {
1549         int i, x, y, ox, numspecs;
1550         Glyph base, new;
1551         XftGlyphFontSpec *specs;
1552         int ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
1553
1554         if (!(win.state & WIN_VISIBLE))
1555                 return;
1556
1557         for (y = y1; y < y2; y++) {
1558                 if (!term.dirty[y])
1559                         continue;
1560
1561                 term.dirty[y] = 0;
1562
1563                 specs = xw.specbuf;
1564                 numspecs = xmakeglyphfontspecs(specs, &term.line[y][x1], x2 - x1, x1, y);
1565
1566                 i = ox = 0;
1567                 for (x = x1; x < x2 && i < numspecs; x++) {
1568                         new = term.line[y][x];
1569                         if (new.mode == ATTR_WDUMMY)
1570                                 continue;
1571                         if (ena_sel && selected(x, y))
1572                                 new.mode ^= ATTR_REVERSE;
1573                         if (i > 0 && ATTRCMP(base, new)) {
1574                                 xdrawglyphfontspecs(specs, base, i, ox, y);
1575                                 specs += i;
1576                                 numspecs -= i;
1577                                 i = 0;
1578                         }
1579                         if (i == 0) {
1580                                 ox = x;
1581                                 base = new;
1582                         }
1583                         i++;
1584                 }
1585                 if (i > 0)
1586                         xdrawglyphfontspecs(specs, base, i, ox, y);
1587         }
1588         xdrawcursor();
1589 }
1590
1591 void
1592 expose(XEvent *ev)
1593 {
1594         redraw();
1595 }
1596
1597 void
1598 visibility(XEvent *ev)
1599 {
1600         XVisibilityEvent *e = &ev->xvisibility;
1601
1602         MODBIT(win.state, e->state != VisibilityFullyObscured, WIN_VISIBLE);
1603 }
1604
1605 void
1606 unmap(XEvent *ev)
1607 {
1608         win.state &= ~WIN_VISIBLE;
1609 }
1610
1611 void
1612 xsetpointermotion(int set)
1613 {
1614         MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
1615         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
1616 }
1617
1618 void
1619 xseturgency(int add)
1620 {
1621         XWMHints *h = XGetWMHints(xw.dpy, xw.win);
1622
1623         MODBIT(h->flags, add, XUrgencyHint);
1624         XSetWMHints(xw.dpy, xw.win, h);
1625         XFree(h);
1626 }
1627
1628 void
1629 xbell(void)
1630 {
1631         if (!(win.state & WIN_FOCUSED))
1632                 xseturgency(1);
1633         if (bellvolume)
1634                 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
1635 }
1636
1637 void
1638 focus(XEvent *ev)
1639 {
1640         XFocusChangeEvent *e = &ev->xfocus;
1641
1642         if (e->mode == NotifyGrab)
1643                 return;
1644
1645         if (ev->type == FocusIn) {
1646                 XSetICFocus(xw.xic);
1647                 win.state |= WIN_FOCUSED;
1648                 xseturgency(0);
1649                 if (IS_SET(MODE_FOCUS))
1650                         ttywrite("\033[I", 3);
1651         } else {
1652                 XUnsetICFocus(xw.xic);
1653                 win.state &= ~WIN_FOCUSED;
1654                 if (IS_SET(MODE_FOCUS))
1655                         ttywrite("\033[O", 3);
1656         }
1657 }
1658
1659 int
1660 match(uint mask, uint state)
1661 {
1662         return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
1663 }
1664
1665 char*
1666 kmap(KeySym k, uint state)
1667 {
1668         Key *kp;
1669         int i;
1670
1671         /* Check for mapped keys out of X11 function keys. */
1672         for (i = 0; i < LEN(mappedkeys); i++) {
1673                 if (mappedkeys[i] == k)
1674                         break;
1675         }
1676         if (i == LEN(mappedkeys)) {
1677                 if ((k & 0xFFFF) < 0xFD00)
1678                         return NULL;
1679         }
1680
1681         for (kp = key; kp < key + LEN(key); kp++) {
1682                 if (kp->k != k)
1683                         continue;
1684
1685                 if (!match(kp->mask, state))
1686                         continue;
1687
1688                 if (IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
1689                         continue;
1690                 if (term.numlock && kp->appkey == 2)
1691                         continue;
1692
1693                 if (IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
1694                         continue;
1695
1696                 if (IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
1697                         continue;
1698
1699                 return kp->s;
1700         }
1701
1702         return NULL;
1703 }
1704
1705 void
1706 kpress(XEvent *ev)
1707 {
1708         XKeyEvent *e = &ev->xkey;
1709         KeySym ksym;
1710         char buf[32], *customkey;
1711         int len;
1712         Rune c;
1713         Status status;
1714         Shortcut *bp;
1715
1716         if (IS_SET(MODE_KBDLOCK))
1717                 return;
1718
1719         len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
1720         /* 1. shortcuts */
1721         for (bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
1722                 if (ksym == bp->keysym && match(bp->mod, e->state)) {
1723                         bp->func(&(bp->arg));
1724                         return;
1725                 }
1726         }
1727
1728         /* 2. custom keys from config.h */
1729         if ((customkey = kmap(ksym, e->state))) {
1730                 ttysend(customkey, strlen(customkey));
1731                 return;
1732         }
1733
1734         /* 3. composed string from input method */
1735         if (len == 0)
1736                 return;
1737         if (len == 1 && e->state & Mod1Mask) {
1738                 if (IS_SET(MODE_8BIT)) {
1739                         if (*buf < 0177) {
1740                                 c = *buf | 0x80;
1741                                 len = utf8encode(c, buf);
1742                         }
1743                 } else {
1744                         buf[1] = buf[0];
1745                         buf[0] = '\033';
1746                         len = 2;
1747                 }
1748         }
1749         ttysend(buf, len);
1750 }
1751
1752
1753 void
1754 cmessage(XEvent *e)
1755 {
1756         /*
1757          * See xembed specs
1758          *  http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
1759          */
1760         if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
1761                 if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
1762                         win.state |= WIN_FOCUSED;
1763                         xseturgency(0);
1764                 } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
1765                         win.state &= ~WIN_FOCUSED;
1766                 }
1767         } else if (e->xclient.data.l[0] == xw.wmdeletewin) {
1768                 /* Send SIGHUP to shell */
1769                 kill(pid, SIGHUP);
1770                 exit(0);
1771         }
1772 }
1773
1774 void
1775 resize(XEvent *e)
1776 {
1777         if (e->xconfigure.width == win.w && e->xconfigure.height == win.h)
1778                 return;
1779
1780         cresize(e->xconfigure.width, e->xconfigure.height);
1781         ttyresize(win.tw, win.th);
1782 }
1783
1784 void
1785 run(void)
1786 {
1787         XEvent ev;
1788         int w = win.w, h = win.h;
1789         fd_set rfd;
1790         int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
1791         struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
1792         long deltatime;
1793
1794         /* Waiting for window mapping */
1795         do {
1796                 XNextEvent(xw.dpy, &ev);
1797                 /*
1798                  * This XFilterEvent call is required because of XOpenIM. It
1799                  * does filter out the key event and some client message for
1800                  * the input method too.
1801                  */
1802                 if (XFilterEvent(&ev, None))
1803                         continue;
1804                 if (ev.type == ConfigureNotify) {
1805                         w = ev.xconfigure.width;
1806                         h = ev.xconfigure.height;
1807                 }
1808         } while (ev.type != MapNotify);
1809
1810         cresize(w, h);
1811         ttynew(opt_line, opt_io, opt_cmd);
1812         ttyresize(win.tw, win.th);
1813
1814         clock_gettime(CLOCK_MONOTONIC, &last);
1815         lastblink = last;
1816
1817         for (xev = actionfps;;) {
1818                 FD_ZERO(&rfd);
1819                 FD_SET(cmdfd, &rfd);
1820                 FD_SET(xfd, &rfd);
1821
1822                 if (pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
1823                         if (errno == EINTR)
1824                                 continue;
1825                         die("select failed: %s\n", strerror(errno));
1826                 }
1827                 if (FD_ISSET(cmdfd, &rfd)) {
1828                         ttyread();
1829                         if (blinktimeout) {
1830                                 blinkset = tattrset(ATTR_BLINK);
1831                                 if (!blinkset)
1832                                         MODBIT(term.mode, 0, MODE_BLINK);
1833                         }
1834                 }
1835
1836                 if (FD_ISSET(xfd, &rfd))
1837                         xev = actionfps;
1838
1839                 clock_gettime(CLOCK_MONOTONIC, &now);
1840                 drawtimeout.tv_sec = 0;
1841                 drawtimeout.tv_nsec =  (1000 * 1E6)/ xfps;
1842                 tv = &drawtimeout;
1843
1844                 dodraw = 0;
1845                 if (blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
1846                         tsetdirtattr(ATTR_BLINK);
1847                         term.mode ^= MODE_BLINK;
1848                         lastblink = now;
1849                         dodraw = 1;
1850                 }
1851                 deltatime = TIMEDIFF(now, last);
1852                 if (deltatime > 1000 / (xev ? xfps : actionfps)) {
1853                         dodraw = 1;
1854                         last = now;
1855                 }
1856
1857                 if (dodraw) {
1858                         while (XPending(xw.dpy)) {
1859                                 XNextEvent(xw.dpy, &ev);
1860                                 if (XFilterEvent(&ev, None))
1861                                         continue;
1862                                 if (handler[ev.type])
1863                                         (handler[ev.type])(&ev);
1864                         }
1865
1866                         draw();
1867                         XFlush(xw.dpy);
1868
1869                         if (xev && !FD_ISSET(xfd, &rfd))
1870                                 xev--;
1871                         if (!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
1872                                 if (blinkset) {
1873                                         if (TIMEDIFF(now, lastblink) \
1874                                                         > blinktimeout) {
1875                                                 drawtimeout.tv_nsec = 1000;
1876                                         } else {
1877                                                 drawtimeout.tv_nsec = (1E6 * \
1878                                                         (blinktimeout - \
1879                                                         TIMEDIFF(now,
1880                                                                 lastblink)));
1881                                         }
1882                                         drawtimeout.tv_sec = \
1883                                             drawtimeout.tv_nsec / 1E9;
1884                                         drawtimeout.tv_nsec %= (long)1E9;
1885                                 } else {
1886                                         tv = NULL;
1887                                 }
1888                         }
1889                 }
1890         }
1891 }
1892
1893 void
1894 usage(void)
1895 {
1896         die("usage: %s [-aiv] [-c class] [-f font] [-g geometry]"
1897             " [-n name] [-o file]\n"
1898             "          [-T title] [-t title] [-w windowid]"
1899             " [[-e] command [args ...]]\n"
1900             "       %s [-aiv] [-c class] [-f font] [-g geometry]"
1901             " [-n name] [-o file]\n"
1902             "          [-T title] [-t title] [-w windowid] -l line"
1903             " [stty_args ...]\n", argv0, argv0);
1904 }
1905
1906 int
1907 main(int argc, char *argv[])
1908 {
1909         xw.l = xw.t = 0;
1910         xw.isfixed = False;
1911         win.cursor = cursorshape;
1912
1913         ARGBEGIN {
1914         case 'a':
1915                 allowaltscreen = 0;
1916                 break;
1917         case 'c':
1918                 opt_class = EARGF(usage());
1919                 break;
1920         case 'e':
1921                 if (argc > 0)
1922                         --argc, ++argv;
1923                 goto run;
1924         case 'f':
1925                 opt_font = EARGF(usage());
1926                 break;
1927         case 'g':
1928                 xw.gm = XParseGeometry(EARGF(usage()),
1929                                 &xw.l, &xw.t, &cols, &rows);
1930                 break;
1931         case 'i':
1932                 xw.isfixed = 1;
1933                 break;
1934         case 'o':
1935                 opt_io = EARGF(usage());
1936                 break;
1937         case 'l':
1938                 opt_line = EARGF(usage());
1939                 break;
1940         case 'n':
1941                 opt_name = EARGF(usage());
1942                 break;
1943         case 't':
1944         case 'T':
1945                 opt_title = EARGF(usage());
1946                 break;
1947         case 'w':
1948                 opt_embed = EARGF(usage());
1949                 break;
1950         case 'v':
1951                 die("%s " VERSION " (c) 2010-2016 st engineers\n", argv0);
1952                 break;
1953         default:
1954                 usage();
1955         } ARGEND;
1956
1957 run:
1958         if (argc > 0) {
1959                 /* eat all remaining arguments */
1960                 opt_cmd = argv;
1961                 if (!opt_title && !opt_line)
1962                         opt_title = basename(xstrdup(argv[0]));
1963         }
1964         setlocale(LC_CTYPE, "");
1965         XSetLocaleModifiers("");
1966         tnew(MAX(cols, 1), MAX(rows, 1));
1967         xinit();
1968         xsetenv();
1969         selinit();
1970         run();
1971
1972         return 0;
1973 }