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