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