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