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base64_digits: reduce scope, implicit zero, +1 size
[st.git] / x.c
blob2a3bd384c46560d5a1067c065efee4a3dc206f4b
1 /* See LICENSE for license details. */
2 #include <errno.h>
3 #include <math.h>
4 #include <limits.h>
5 #include <locale.h>
6 #include <signal.h>
7 #include <sys/select.h>
8 #include <time.h>
9 #include <unistd.h>
10 #include <libgen.h>
11 #include <X11/Xatom.h>
12 #include <X11/Xlib.h>
13 #include <X11/cursorfont.h>
14 #include <X11/keysym.h>
15 #include <X11/Xft/Xft.h>
16 #include <X11/XKBlib.h>
17
18 char *argv0;
19 #include "arg.h"
20 #include "st.h"
21 #include "win.h"
22
23 /* types used in config.h */
24 typedef struct {
25 uint mod;
26 KeySym keysym;
27 void (*func)(const Arg *);
28 const Arg arg;
29 } Shortcut;
30
31 typedef struct {
32 uint mod;
33 uint button;
34 void (*func)(const Arg *);
35 const Arg arg;
36 uint release;
37 } MouseShortcut;
38
39 typedef struct {
40 KeySym k;
41 uint mask;
42 char *s;
43 /* three-valued logic variables: 0 indifferent, 1 on, -1 off */
44 signed char appkey; /* application keypad */
45 signed char appcursor; /* application cursor */
46 } Key;
47
48 /* X modifiers */
49 #define XK_ANY_MOD UINT_MAX
50 #define XK_NO_MOD 0
51 #define XK_SWITCH_MOD (1<<13|1<<14)
52
53 /* function definitions used in config.h */
54 static void clipcopy(const Arg *);
55 static void clippaste(const Arg *);
56 static void numlock(const Arg *);
57 static void selpaste(const Arg *);
58 static void zoom(const Arg *);
59 static void zoomabs(const Arg *);
60 static void zoomreset(const Arg *);
61 static void ttysend(const Arg *);
62
63 /* config.h for applying patches and the configuration. */
64 #include "config.h"
65
66 /* XEMBED messages */
67 #define XEMBED_FOCUS_IN 4
68 #define XEMBED_FOCUS_OUT 5
69
70 /* macros */
71 #define IS_SET(flag) ((win.mode & (flag)) != 0)
72 #define TRUERED(x) (((x) & 0xff0000) >> 8)
73 #define TRUEGREEN(x) (((x) & 0xff00))
74 #define TRUEBLUE(x) (((x) & 0xff) << 8)
75
76 typedef XftDraw *Draw;
77 typedef XftColor Color;
78 typedef XftGlyphFontSpec GlyphFontSpec;
79
80 /* Purely graphic info */
81 typedef struct {
82 int tw, th; /* tty width and height */
83 int w, h; /* window width and height */
84 int ch; /* char height */
85 int cw; /* char width */
86 int mode; /* window state/mode flags */
87 int cursor; /* cursor style */
88 } TermWindow;
89
90 typedef struct {
91 Display *dpy;
92 Colormap cmap;
93 Window win;
94 Drawable buf;
95 GlyphFontSpec *specbuf; /* font spec buffer used for rendering */
96 Atom xembed, wmdeletewin, netwmname, netwmiconname, netwmpid;
97 struct {
98 XIM xim;
99 XIC xic;
100 XPoint spot;
101 XVaNestedList spotlist;
102 } ime;
103 Draw draw;
104 Visual *vis;
105 XSetWindowAttributes attrs;
106 int scr;
107 int isfixed; /* is fixed geometry? */
108 int l, t; /* left and top offset */
109 int gm; /* geometry mask */
110 } XWindow;
111
112 typedef struct {
113 Atom xtarget;
114 char *primary, *clipboard;
115 struct timespec tclick1;
116 struct timespec tclick2;
117 } XSelection;
118
119 /* Font structure */
120 #define Font Font_
121 typedef struct {
122 int height;
123 int width;
124 int ascent;
125 int descent;
126 int badslant;
127 int badweight;
128 short lbearing;
129 short rbearing;
130 XftFont *match;
131 FcFontSet *set;
132 FcPattern *pattern;
133 } Font;
134
135 /* Drawing Context */
136 typedef struct {
137 Color *col;
138 size_t collen;
139 Font font, bfont, ifont, ibfont;
140 GC gc;
141 } DC;
142
143 static inline ushort sixd_to_16bit(int);
144 static int xmakeglyphfontspecs(XftGlyphFontSpec *, const Glyph *, int, int, int);
145 static void xdrawglyphfontspecs(const XftGlyphFontSpec *, Glyph, int, int, int);
146 static void xdrawglyph(Glyph, int, int);
147 static void xclear(int, int, int, int);
148 static int xgeommasktogravity(int);
149 static int ximopen(Display *);
150 static void ximinstantiate(Display *, XPointer, XPointer);
151 static void ximdestroy(XIM, XPointer, XPointer);
152 static int xicdestroy(XIC, XPointer, XPointer);
153 static void xinit(int, int);
154 static void cresize(int, int);
155 static void xresize(int, int);
156 static void xhints(void);
157 static int xloadcolor(int, const char *, Color *);
158 static int xloadfont(Font *, FcPattern *);
159 static void xloadfonts(const char *, double);
160 static void xunloadfont(Font *);
161 static void xunloadfonts(void);
162 static void xsetenv(void);
163 static void xseturgency(int);
164 static int evcol(XEvent *);
165 static int evrow(XEvent *);
166
167 static void expose(XEvent *);
168 static void visibility(XEvent *);
169 static void unmap(XEvent *);
170 static void kpress(XEvent *);
171 static void cmessage(XEvent *);
172 static void resize(XEvent *);
173 static void focus(XEvent *);
174 static uint buttonmask(uint);
175 static int mouseaction(XEvent *, uint);
176 static void brelease(XEvent *);
177 static void bpress(XEvent *);
178 static void bmotion(XEvent *);
179 static void propnotify(XEvent *);
180 static void selnotify(XEvent *);
181 static void selclear_(XEvent *);
182 static void selrequest(XEvent *);
183 static void setsel(char *, Time);
184 static void mousesel(XEvent *, int);
185 static void mousereport(XEvent *);
186 static char *kmap(KeySym, uint);
187 static int match(uint, uint);
188
189 static void run(void);
190 static void usage(void);
191
192 static void (*handler[LASTEvent])(XEvent *) = {
193 [KeyPress] = kpress,
194 [ClientMessage] = cmessage,
195 [ConfigureNotify] = resize,
196 [VisibilityNotify] = visibility,
197 [UnmapNotify] = unmap,
198 [Expose] = expose,
199 [FocusIn] = focus,
200 [FocusOut] = focus,
201 [MotionNotify] = bmotion,
202 [ButtonPress] = bpress,
203 [ButtonRelease] = brelease,
204 /*
205 * Uncomment if you want the selection to disappear when you select something
206 * different in another window.
207 */
208 /* [SelectionClear] = selclear_, */
209 [SelectionNotify] = selnotify,
210 /*
211 * PropertyNotify is only turned on when there is some INCR transfer happening
212 * for the selection retrieval.
213 */
214 [PropertyNotify] = propnotify,
215 [SelectionRequest] = selrequest,
216 };
217
218 /* Globals */
219 static DC dc;
220 static XWindow xw;
221 static XSelection xsel;
222 static TermWindow win;
223
224 /* Font Ring Cache */
225 enum {
226 FRC_NORMAL,
227 FRC_ITALIC,
228 FRC_BOLD,
229 FRC_ITALICBOLD
230 };
231
232 typedef struct {
233 XftFont *font;
234 int flags;
235 Rune unicodep;
236 } Fontcache;
237
238 /* Fontcache is an array now. A new font will be appended to the array. */
239 static Fontcache *frc = NULL;
240 static int frclen = 0;
241 static int frccap = 0;
242 static char *usedfont = NULL;
243 static double usedfontsize = 0;
244 static double defaultfontsize = 0;
245
246 static char *opt_class = NULL;
247 static char **opt_cmd = NULL;
248 static char *opt_embed = NULL;
249 static char *opt_font = NULL;
250 static char *opt_io = NULL;
251 static char *opt_line = NULL;
252 static char *opt_name = NULL;
253 static char *opt_title = NULL;
254
255 static uint buttons; /* bit field of pressed buttons */
256
257 void
258 clipcopy(const Arg *dummy)
259 {
260 Atom clipboard;
261
262 free(xsel.clipboard);
263 xsel.clipboard = NULL;
264
265 if (xsel.primary != NULL) {
266 xsel.clipboard = xstrdup(xsel.primary);
267 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
268 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
269 }
270 }
271
272 void
273 clippaste(const Arg *dummy)
274 {
275 Atom clipboard;
276
277 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
278 XConvertSelection(xw.dpy, clipboard, xsel.xtarget, clipboard,
279 xw.win, CurrentTime);
280 }
281
282 void
283 selpaste(const Arg *dummy)
284 {
285 XConvertSelection(xw.dpy, XA_PRIMARY, xsel.xtarget, XA_PRIMARY,
286 xw.win, CurrentTime);
287 }
288
289 void
290 numlock(const Arg *dummy)
291 {
292 win.mode ^= MODE_NUMLOCK;
293 }
294
295 void
296 zoom(const Arg *arg)
297 {
298 Arg larg;
299
300 larg.f = usedfontsize + arg->f;
301 zoomabs(&larg);
302 }
303
304 void
305 zoomabs(const Arg *arg)
306 {
307 xunloadfonts();
308 xloadfonts(usedfont, arg->f);
309 cresize(0, 0);
310 redraw();
311 xhints();
312 }
313
314 void
315 zoomreset(const Arg *arg)
316 {
317 Arg larg;
318
319 if (defaultfontsize > 0) {
320 larg.f = defaultfontsize;
321 zoomabs(&larg);
322 }
323 }
324
325 void
326 ttysend(const Arg *arg)
327 {
328 ttywrite(arg->s, strlen(arg->s), 1);
329 }
330
331 int
332 evcol(XEvent *e)
333 {
334 int x = e->xbutton.x - borderpx;
335 LIMIT(x, 0, win.tw - 1);
336 return x / win.cw;
337 }
338
339 int
340 evrow(XEvent *e)
341 {
342 int y = e->xbutton.y - borderpx;
343 LIMIT(y, 0, win.th - 1);
344 return y / win.ch;
345 }
346
347 void
348 mousesel(XEvent *e, int done)
349 {
350 int type, seltype = SEL_REGULAR;
351 uint state = e->xbutton.state & ~(Button1Mask | forcemousemod);
352
353 for (type = 1; type < LEN(selmasks); ++type) {
354 if (match(selmasks[type], state)) {
355 seltype = type;
356 break;
357 }
358 }
359 selextend(evcol(e), evrow(e), seltype, done);
360 if (done)
361 setsel(getsel(), e->xbutton.time);
362 }
363
364 void
365 mousereport(XEvent *e)
366 {
367 int len, btn, code;
368 int x = evcol(e), y = evrow(e);
369 int state = e->xbutton.state;
370 char buf[40];
371 static int ox, oy;
372
373 if (e->type == MotionNotify) {
374 if (x == ox && y == oy)
375 return;
376 if (!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
377 return;
378 /* MODE_MOUSEMOTION: no reporting if no button is pressed */
379 if (IS_SET(MODE_MOUSEMOTION) && buttons == 0)
380 return;
381 /* Set btn to lowest-numbered pressed button, or 12 if no
382 * buttons are pressed. */
383 for (btn = 1; btn <= 11 && !(buttons & (1<<(btn-1))); btn++)
384 ;
385 code = 32;
386 } else {
387 btn = e->xbutton.button;
388 /* Only buttons 1 through 11 can be encoded */
389 if (btn < 1 || btn > 11)
390 return;
391 if (e->type == ButtonRelease) {
392 /* MODE_MOUSEX10: no button release reporting */
393 if (IS_SET(MODE_MOUSEX10))
394 return;
395 /* Don't send release events for the scroll wheel */
396 if (btn == 4 || btn == 5)
397 return;
398 }
399 code = 0;
400 }
401
402 ox = x;
403 oy = y;
404
405 /* Encode btn into code. If no button is pressed for a motion event in
406 * MODE_MOUSEMANY, then encode it as a release. */
407 if ((!IS_SET(MODE_MOUSESGR) && e->type == ButtonRelease) || btn == 12)
408 code += 3;
409 else if (btn >= 8)
410 code += 128 + btn - 8;
411 else if (btn >= 4)
412 code += 64 + btn - 4;
413 else
414 code += btn - 1;
415
416 if (!IS_SET(MODE_MOUSEX10)) {
417 code += ((state & ShiftMask ) ? 4 : 0)
418 + ((state & Mod1Mask ) ? 8 : 0) /* meta key: alt */
419 + ((state & ControlMask) ? 16 : 0);
420 }
421
422 if (IS_SET(MODE_MOUSESGR)) {
423 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
424 code, x+1, y+1,
425 e->type == ButtonRelease ? 'm' : 'M');
426 } else if (x < 223 && y < 223) {
427 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
428 32+code, 32+x+1, 32+y+1);
429 } else {
430 return;
431 }
432
433 ttywrite(buf, len, 0);
434 }
435
436 uint
437 buttonmask(uint button)
438 {
439 return button == Button1 ? Button1Mask
440 : button == Button2 ? Button2Mask
441 : button == Button3 ? Button3Mask
442 : button == Button4 ? Button4Mask
443 : button == Button5 ? Button5Mask
444 : 0;
445 }
446
447 int
448 mouseaction(XEvent *e, uint release)
449 {
450 MouseShortcut *ms;
451
452 /* ignore Button<N>mask for Button<N> - it's set on release */
453 uint state = e->xbutton.state & ~buttonmask(e->xbutton.button);
454
455 for (ms = mshortcuts; ms < mshortcuts + LEN(mshortcuts); ms++) {
456 if (ms->release == release &&
457 ms->button == e->xbutton.button &&
458 (match(ms->mod, state) || /* exact or forced */
459 match(ms->mod, state & ~forcemousemod))) {
460 ms->func(&(ms->arg));
461 return 1;
462 }
463 }
464
465 return 0;
466 }
467
468 void
469 bpress(XEvent *e)
470 {
471 int btn = e->xbutton.button;
472 struct timespec now;
473 int snap;
474
475 if (1 <= btn && btn <= 11)
476 buttons |= 1 << (btn-1);
477
478 if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forcemousemod)) {
479 mousereport(e);
480 return;
481 }
482
483 if (mouseaction(e, 0))
484 return;
485
486 if (btn == Button1) {
487 /*
488 * If the user clicks below predefined timeouts specific
489 * snapping behaviour is exposed.
490 */
491 clock_gettime(CLOCK_MONOTONIC, &now);
492 if (TIMEDIFF(now, xsel.tclick2) <= tripleclicktimeout) {
493 snap = SNAP_LINE;
494 } else if (TIMEDIFF(now, xsel.tclick1) <= doubleclicktimeout) {
495 snap = SNAP_WORD;
496 } else {
497 snap = 0;
498 }
499 xsel.tclick2 = xsel.tclick1;
500 xsel.tclick1 = now;
501
502 selstart(evcol(e), evrow(e), snap);
503 }
504 }
505
506 void
507 propnotify(XEvent *e)
508 {
509 XPropertyEvent *xpev;
510 Atom clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
511
512 xpev = &e->xproperty;
513 if (xpev->state == PropertyNewValue &&
514 (xpev->atom == XA_PRIMARY ||
515 xpev->atom == clipboard)) {
516 selnotify(e);
517 }
518 }
519
520 void
521 selnotify(XEvent *e)
522 {
523 ulong nitems, ofs, rem;
524 int format;
525 uchar *data, *last, *repl;
526 Atom type, incratom, property = None;
527
528 incratom = XInternAtom(xw.dpy, "INCR", 0);
529
530 ofs = 0;
531 if (e->type == SelectionNotify)
532 property = e->xselection.property;
533 else if (e->type == PropertyNotify)
534 property = e->xproperty.atom;
535
536 if (property == None)
537 return;
538
539 do {
540 if (XGetWindowProperty(xw.dpy, xw.win, property, ofs,
541 BUFSIZ/4, False, AnyPropertyType,
542 &type, &format, &nitems, &rem,
543 &data)) {
544 fprintf(stderr, "Clipboard allocation failed\n");
545 return;
546 }
547
548 if (e->type == PropertyNotify && nitems == 0 && rem == 0) {
549 /*
550 * If there is some PropertyNotify with no data, then
551 * this is the signal of the selection owner that all
552 * data has been transferred. We won't need to receive
553 * PropertyNotify events anymore.
554 */
555 MODBIT(xw.attrs.event_mask, 0, PropertyChangeMask);
556 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
557 &xw.attrs);
558 }
559
560 if (type == incratom) {
561 /*
562 * Activate the PropertyNotify events so we receive
563 * when the selection owner does send us the next
564 * chunk of data.
565 */
566 MODBIT(xw.attrs.event_mask, 1, PropertyChangeMask);
567 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
568 &xw.attrs);
569
570 /*
571 * Deleting the property is the transfer start signal.
572 */
573 XDeleteProperty(xw.dpy, xw.win, (int)property);
574 continue;
575 }
576
577 /*
578 * As seen in getsel:
579 * Line endings are inconsistent in the terminal and GUI world
580 * copy and pasting. When receiving some selection data,
581 * replace all '\n' with '\r'.
582 * FIXME: Fix the computer world.
583 */
584 repl = data;
585 last = data + nitems * format / 8;
586 while ((repl = memchr(repl, '\n', last - repl))) {
587 *repl++ = '\r';
588 }
589
590 if (IS_SET(MODE_BRCKTPASTE) && ofs == 0)
591 ttywrite("\033[200~", 6, 0);
592 ttywrite((char *)data, nitems * format / 8, 1);
593 if (IS_SET(MODE_BRCKTPASTE) && rem == 0)
594 ttywrite("\033[201~", 6, 0);
595 XFree(data);
596 /* number of 32-bit chunks returned */
597 ofs += nitems * format / 32;
598 } while (rem > 0);
599
600 /*
601 * Deleting the property again tells the selection owner to send the
602 * next data chunk in the property.
603 */
604 XDeleteProperty(xw.dpy, xw.win, (int)property);
605 }
606
607 void
608 xclipcopy(void)
609 {
610 clipcopy(NULL);
611 }
612
613 void
614 selclear_(XEvent *e)
615 {
616 selclear();
617 }
618
619 void
620 selrequest(XEvent *e)
621 {
622 XSelectionRequestEvent *xsre;
623 XSelectionEvent xev;
624 Atom xa_targets, string, clipboard;
625 char *seltext;
626
627 xsre = (XSelectionRequestEvent *) e;
628 xev.type = SelectionNotify;
629 xev.requestor = xsre->requestor;
630 xev.selection = xsre->selection;
631 xev.target = xsre->target;
632 xev.time = xsre->time;
633 if (xsre->property == None)
634 xsre->property = xsre->target;
635
636 /* reject */
637 xev.property = None;
638
639 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
640 if (xsre->target == xa_targets) {
641 /* respond with the supported type */
642 string = xsel.xtarget;
643 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
644 XA_ATOM, 32, PropModeReplace,
645 (uchar *) &string, 1);
646 xev.property = xsre->property;
647 } else if (xsre->target == xsel.xtarget || xsre->target == XA_STRING) {
648 /*
649 * xith XA_STRING non ascii characters may be incorrect in the
650 * requestor. It is not our problem, use utf8.
651 */
652 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
653 if (xsre->selection == XA_PRIMARY) {
654 seltext = xsel.primary;
655 } else if (xsre->selection == clipboard) {
656 seltext = xsel.clipboard;
657 } else {
658 fprintf(stderr,
659 "Unhandled clipboard selection 0x%lx\n",
660 xsre->selection);
661 return;
662 }
663 if (seltext != NULL) {
664 XChangeProperty(xsre->display, xsre->requestor,
665 xsre->property, xsre->target,
666 8, PropModeReplace,
667 (uchar *)seltext, strlen(seltext));
668 xev.property = xsre->property;
669 }
670 }
671
672 /* all done, send a notification to the listener */
673 if (!XSendEvent(xsre->display, xsre->requestor, 1, 0, (XEvent *) &xev))
674 fprintf(stderr, "Error sending SelectionNotify event\n");
675 }
676
677 void
678 setsel(char *str, Time t)
679 {
680 if (!str)
681 return;
682
683 free(xsel.primary);
684 xsel.primary = str;
685
686 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
687 if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
688 selclear();
689 }
690
691 void
692 xsetsel(char *str)
693 {
694 setsel(str, CurrentTime);
695 }
696
697 void
698 brelease(XEvent *e)
699 {
700 int btn = e->xbutton.button;
701
702 if (1 <= btn && btn <= 11)
703 buttons &= ~(1 << (btn-1));
704
705 if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forcemousemod)) {
706 mousereport(e);
707 return;
708 }
709
710 if (mouseaction(e, 1))
711 return;
712 if (btn == Button1)
713 mousesel(e, 1);
714 }
715
716 void
717 bmotion(XEvent *e)
718 {
719 if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forcemousemod)) {
720 mousereport(e);
721 return;
722 }
723
724 mousesel(e, 0);
725 }
726
727 void
728 cresize(int width, int height)
729 {
730 int col, row;
731
732 if (width != 0)
733 win.w = width;
734 if (height != 0)
735 win.h = height;
736
737 col = (win.w - 2 * borderpx) / win.cw;
738 row = (win.h - 2 * borderpx) / win.ch;
739 col = MAX(1, col);
740 row = MAX(1, row);
741
742 tresize(col, row);
743 xresize(col, row);
744 ttyresize(win.tw, win.th);
745 }
746
747 void
748 xresize(int col, int row)
749 {
750 win.tw = col * win.cw;
751 win.th = row * win.ch;
752
753 XFreePixmap(xw.dpy, xw.buf);
754 xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
755 DefaultDepth(xw.dpy, xw.scr));
756 XftDrawChange(xw.draw, xw.buf);
757 xclear(0, 0, win.w, win.h);
758
759 /* resize to new width */
760 xw.specbuf = xrealloc(xw.specbuf, col * sizeof(GlyphFontSpec));
761 }
762
763 ushort
764 sixd_to_16bit(int x)
765 {
766 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
767 }
768
769 int
770 xloadcolor(int i, const char *name, Color *ncolor)
771 {
772 XRenderColor color = { .alpha = 0xffff };
773
774 if (!name) {
775 if (BETWEEN(i, 16, 255)) { /* 256 color */
776 if (i < 6*6*6+16) { /* same colors as xterm */
777 color.red = sixd_to_16bit( ((i-16)/36)%6 );
778 color.green = sixd_to_16bit( ((i-16)/6) %6 );
779 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
780 } else { /* greyscale */
781 color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
782 color.green = color.blue = color.red;
783 }
784 return XftColorAllocValue(xw.dpy, xw.vis,
785 xw.cmap, &color, ncolor);
786 } else
787 name = colorname[i];
788 }
789
790 return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
791 }
792
793 void
794 xloadcols(void)
795 {
796 int i;
797 static int loaded;
798 Color *cp;
799
800 if (loaded) {
801 for (cp = dc.col; cp < &dc.col[dc.collen]; ++cp)
802 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
803 } else {
804 dc.collen = MAX(LEN(colorname), 256);
805 dc.col = xmalloc(dc.collen * sizeof(Color));
806 }
807
808 for (i = 0; i < dc.collen; i++)
809 if (!xloadcolor(i, NULL, &dc.col[i])) {
810 if (colorname[i])
811 die("could not allocate color '%s'\n", colorname[i]);
812 else
813 die("could not allocate color %d\n", i);
814 }
815 loaded = 1;
816 }
817
818 int
819 xgetcolor(int x, unsigned char *r, unsigned char *g, unsigned char *b)
820 {
821 if (!BETWEEN(x, 0, dc.collen))
822 return 1;
823
824 *r = dc.col[x].color.red >> 8;
825 *g = dc.col[x].color.green >> 8;
826 *b = dc.col[x].color.blue >> 8;
827
828 return 0;
829 }
830
831 int
832 xsetcolorname(int x, const char *name)
833 {
834 Color ncolor;
835
836 if (!BETWEEN(x, 0, dc.collen))
837 return 1;
838
839 if (!xloadcolor(x, name, &ncolor))
840 return 1;
841
842 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
843 dc.col[x] = ncolor;
844
845 return 0;
846 }
847
848 /*
849 * Absolute coordinates.
850 */
851 void
852 xclear(int x1, int y1, int x2, int y2)
853 {
854 XftDrawRect(xw.draw,
855 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
856 x1, y1, x2-x1, y2-y1);
857 }
858
859 void
860 xhints(void)
861 {
862 XClassHint class = {opt_name ? opt_name : termname,
863 opt_class ? opt_class : termname};
864 XWMHints wm = {.flags = InputHint, .input = 1};
865 XSizeHints *sizeh;
866
867 sizeh = XAllocSizeHints();
868
869 sizeh->flags = PSize | PResizeInc | PBaseSize | PMinSize;
870 sizeh->height = win.h;
871 sizeh->width = win.w;
872 sizeh->height_inc = win.ch;
873 sizeh->width_inc = win.cw;
874 sizeh->base_height = 2 * borderpx;
875 sizeh->base_width = 2 * borderpx;
876 sizeh->min_height = win.ch + 2 * borderpx;
877 sizeh->min_width = win.cw + 2 * borderpx;
878 if (xw.isfixed) {
879 sizeh->flags |= PMaxSize;
880 sizeh->min_width = sizeh->max_width = win.w;
881 sizeh->min_height = sizeh->max_height = win.h;
882 }
883 if (xw.gm & (XValue|YValue)) {
884 sizeh->flags |= USPosition | PWinGravity;
885 sizeh->x = xw.l;
886 sizeh->y = xw.t;
887 sizeh->win_gravity = xgeommasktogravity(xw.gm);
888 }
889
890 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
891 &class);
892 XFree(sizeh);
893 }
894
895 int
896 xgeommasktogravity(int mask)
897 {
898 switch (mask & (XNegative|YNegative)) {
899 case 0:
900 return NorthWestGravity;
901 case XNegative:
902 return NorthEastGravity;
903 case YNegative:
904 return SouthWestGravity;
905 }
906
907 return SouthEastGravity;
908 }
909
910 int
911 xloadfont(Font *f, FcPattern *pattern)
912 {
913 FcPattern *configured;
914 FcPattern *match;
915 FcResult result;
916 XGlyphInfo extents;
917 int wantattr, haveattr;
918
919 /*
920 * Manually configure instead of calling XftMatchFont
921 * so that we can use the configured pattern for
922 * "missing glyph" lookups.
923 */
924 configured = FcPatternDuplicate(pattern);
925 if (!configured)
926 return 1;
927
928 FcConfigSubstitute(NULL, configured, FcMatchPattern);
929 XftDefaultSubstitute(xw.dpy, xw.scr, configured);
930
931 match = FcFontMatch(NULL, configured, &result);
932 if (!match) {
933 FcPatternDestroy(configured);
934 return 1;
935 }
936
937 if (!(f->match = XftFontOpenPattern(xw.dpy, match))) {
938 FcPatternDestroy(configured);
939 FcPatternDestroy(match);
940 return 1;
941 }
942
943 if ((XftPatternGetInteger(pattern, "slant", 0, &wantattr) ==
944 XftResultMatch)) {
945 /*
946 * Check if xft was unable to find a font with the appropriate
947 * slant but gave us one anyway. Try to mitigate.
948 */
949 if ((XftPatternGetInteger(f->match->pattern, "slant", 0,
950 &haveattr) != XftResultMatch) || haveattr < wantattr) {
951 f->badslant = 1;
952 fputs("font slant does not match\n", stderr);
953 }
954 }
955
956 if ((XftPatternGetInteger(pattern, "weight", 0, &wantattr) ==
957 XftResultMatch)) {
958 if ((XftPatternGetInteger(f->match->pattern, "weight", 0,
959 &haveattr) != XftResultMatch) || haveattr != wantattr) {
960 f->badweight = 1;
961 fputs("font weight does not match\n", stderr);
962 }
963 }
964
965 XftTextExtentsUtf8(xw.dpy, f->match,
966 (const FcChar8 *) ascii_printable,
967 strlen(ascii_printable), &extents);
968
969 f->set = NULL;
970 f->pattern = configured;
971
972 f->ascent = f->match->ascent;
973 f->descent = f->match->descent;
974 f->lbearing = 0;
975 f->rbearing = f->match->max_advance_width;
976
977 f->height = f->ascent + f->descent;
978 f->width = DIVCEIL(extents.xOff, strlen(ascii_printable));
979
980 return 0;
981 }
982
983 void
984 xloadfonts(const char *fontstr, double fontsize)
985 {
986 FcPattern *pattern;
987 double fontval;
988
989 if (fontstr[0] == '-')
990 pattern = XftXlfdParse(fontstr, False, False);
991 else
992 pattern = FcNameParse((const FcChar8 *)fontstr);
993
994 if (!pattern)
995 die("can't open font %s\n", fontstr);
996
997 if (fontsize > 1) {
998 FcPatternDel(pattern, FC_PIXEL_SIZE);
999 FcPatternDel(pattern, FC_SIZE);
1000 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
1001 usedfontsize = fontsize;
1002 } else {
1003 if (FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval) ==
1004 FcResultMatch) {
1005 usedfontsize = fontval;
1006 } else if (FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval) ==
1007 FcResultMatch) {
1008 usedfontsize = -1;
1009 } else {
1010 /*
1011 * Default font size is 12, if none given. This is to
1012 * have a known usedfontsize value.
1013 */
1014 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
1015 usedfontsize = 12;
1016 }
1017 defaultfontsize = usedfontsize;
1018 }
1019
1020 if (xloadfont(&dc.font, pattern))
1021 die("can't open font %s\n", fontstr);
1022
1023 if (usedfontsize < 0) {
1024 FcPatternGetDouble(dc.font.match->pattern,
1025 FC_PIXEL_SIZE, 0, &fontval);
1026 usedfontsize = fontval;
1027 if (fontsize == 0)
1028 defaultfontsize = fontval;
1029 }
1030
1031 /* Setting character width and height. */
1032 win.cw = ceilf(dc.font.width * cwscale);
1033 win.ch = ceilf(dc.font.height * chscale);
1034
1035 FcPatternDel(pattern, FC_SLANT);
1036 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
1037 if (xloadfont(&dc.ifont, pattern))
1038 die("can't open font %s\n", fontstr);
1039
1040 FcPatternDel(pattern, FC_WEIGHT);
1041 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
1042 if (xloadfont(&dc.ibfont, pattern))
1043 die("can't open font %s\n", fontstr);
1044
1045 FcPatternDel(pattern, FC_SLANT);
1046 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
1047 if (xloadfont(&dc.bfont, pattern))
1048 die("can't open font %s\n", fontstr);
1049
1050 FcPatternDestroy(pattern);
1051 }
1052
1053 void
1054 xunloadfont(Font *f)
1055 {
1056 XftFontClose(xw.dpy, f->match);
1057 FcPatternDestroy(f->pattern);
1058 if (f->set)
1059 FcFontSetDestroy(f->set);
1060 }
1061
1062 void
1063 xunloadfonts(void)
1064 {
1065 /* Free the loaded fonts in the font cache. */
1066 while (frclen > 0)
1067 XftFontClose(xw.dpy, frc[--frclen].font);
1068
1069 xunloadfont(&dc.font);
1070 xunloadfont(&dc.bfont);
1071 xunloadfont(&dc.ifont);
1072 xunloadfont(&dc.ibfont);
1073 }
1074
1075 int
1076 ximopen(Display *dpy)
1077 {
1078 XIMCallback imdestroy = { .client_data = NULL, .callback = ximdestroy };
1079 XICCallback icdestroy = { .client_data = NULL, .callback = xicdestroy };
1080
1081 xw.ime.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
1082 if (xw.ime.xim == NULL)
1083 return 0;
1084
1085 if (XSetIMValues(xw.ime.xim, XNDestroyCallback, &imdestroy, NULL))
1086 fprintf(stderr, "XSetIMValues: "
1087 "Could not set XNDestroyCallback.\n");
1088
1089 xw.ime.spotlist = XVaCreateNestedList(0, XNSpotLocation, &xw.ime.spot,
1090 NULL);
1091
1092 if (xw.ime.xic == NULL) {
1093 xw.ime.xic = XCreateIC(xw.ime.xim, XNInputStyle,
1094 XIMPreeditNothing | XIMStatusNothing,
1095 XNClientWindow, xw.win,
1096 XNDestroyCallback, &icdestroy,
1097 NULL);
1098 }
1099 if (xw.ime.xic == NULL)
1100 fprintf(stderr, "XCreateIC: Could not create input context.\n");
1101
1102 return 1;
1103 }
1104
1105 void
1106 ximinstantiate(Display *dpy, XPointer client, XPointer call)
1107 {
1108 if (ximopen(dpy))
1109 XUnregisterIMInstantiateCallback(xw.dpy, NULL, NULL, NULL,
1110 ximinstantiate, NULL);
1111 }
1112
1113 void
1114 ximdestroy(XIM xim, XPointer client, XPointer call)
1115 {
1116 xw.ime.xim = NULL;
1117 XRegisterIMInstantiateCallback(xw.dpy, NULL, NULL, NULL,
1118 ximinstantiate, NULL);
1119 XFree(xw.ime.spotlist);
1120 }
1121
1122 int
1123 xicdestroy(XIC xim, XPointer client, XPointer call)
1124 {
1125 xw.ime.xic = NULL;
1126 return 1;
1127 }
1128
1129 void
1130 xinit(int cols, int rows)
1131 {
1132 XGCValues gcvalues;
1133 Cursor cursor;
1134 Window parent;
1135 pid_t thispid = getpid();
1136 XColor xmousefg, xmousebg;
1137
1138 if (!(xw.dpy = XOpenDisplay(NULL)))
1139 die("can't open display\n");
1140 xw.scr = XDefaultScreen(xw.dpy);
1141 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
1142
1143 /* font */
1144 if (!FcInit())
1145 die("could not init fontconfig.\n");
1146
1147 usedfont = (opt_font == NULL)? font : opt_font;
1148 xloadfonts(usedfont, 0);
1149
1150 /* colors */
1151 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1152 xloadcols();
1153
1154 /* adjust fixed window geometry */
1155 win.w = 2 * borderpx + cols * win.cw;
1156 win.h = 2 * borderpx + rows * win.ch;
1157 if (xw.gm & XNegative)
1158 xw.l += DisplayWidth(xw.dpy, xw.scr) - win.w - 2;
1159 if (xw.gm & YNegative)
1160 xw.t += DisplayHeight(xw.dpy, xw.scr) - win.h - 2;
1161
1162 /* Events */
1163 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
1164 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
1165 xw.attrs.bit_gravity = NorthWestGravity;
1166 xw.attrs.event_mask = FocusChangeMask | KeyPressMask | KeyReleaseMask
1167 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1168 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
1169 xw.attrs.colormap = xw.cmap;
1170
1171 if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
1172 parent = XRootWindow(xw.dpy, xw.scr);
1173 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
1174 win.w, win.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
1175 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
1176 | CWEventMask | CWColormap, &xw.attrs);
1177
1178 memset(&gcvalues, 0, sizeof(gcvalues));
1179 gcvalues.graphics_exposures = False;
1180 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
1181 &gcvalues);
1182 xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
1183 DefaultDepth(xw.dpy, xw.scr));
1184 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
1185 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, win.w, win.h);
1186
1187 /* font spec buffer */
1188 xw.specbuf = xmalloc(cols * sizeof(GlyphFontSpec));
1189
1190 /* Xft rendering context */
1191 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
1192
1193 /* input methods */
1194 if (!ximopen(xw.dpy)) {
1195 XRegisterIMInstantiateCallback(xw.dpy, NULL, NULL, NULL,
1196 ximinstantiate, NULL);
1197 }
1198
1199 /* white cursor, black outline */
1200 cursor = XCreateFontCursor(xw.dpy, mouseshape);
1201 XDefineCursor(xw.dpy, xw.win, cursor);
1202
1203 if (XParseColor(xw.dpy, xw.cmap, colorname[mousefg], &xmousefg) == 0) {
1204 xmousefg.red = 0xffff;
1205 xmousefg.green = 0xffff;
1206 xmousefg.blue = 0xffff;
1207 }
1208
1209 if (XParseColor(xw.dpy, xw.cmap, colorname[mousebg], &xmousebg) == 0) {
1210 xmousebg.red = 0x0000;
1211 xmousebg.green = 0x0000;
1212 xmousebg.blue = 0x0000;
1213 }
1214
1215 XRecolorCursor(xw.dpy, cursor, &xmousefg, &xmousebg);
1216
1217 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
1218 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
1219 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
1220 xw.netwmiconname = XInternAtom(xw.dpy, "_NET_WM_ICON_NAME", False);
1221 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
1222
1223 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
1224 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
1225 PropModeReplace, (uchar *)&thispid, 1);
1226
1227 win.mode = MODE_NUMLOCK;
1228 resettitle();
1229 xhints();
1230 XMapWindow(xw.dpy, xw.win);
1231 XSync(xw.dpy, False);
1232
1233 clock_gettime(CLOCK_MONOTONIC, &xsel.tclick1);
1234 clock_gettime(CLOCK_MONOTONIC, &xsel.tclick2);
1235 xsel.primary = NULL;
1236 xsel.clipboard = NULL;
1237 xsel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
1238 if (xsel.xtarget == None)
1239 xsel.xtarget = XA_STRING;
1240 }
1241
1242 int
1243 xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x, int y)
1244 {
1245 float winx = borderpx + x * win.cw, winy = borderpx + y * win.ch, xp, yp;
1246 ushort mode, prevmode = USHRT_MAX;
1247 Font *font = &dc.font;
1248 int frcflags = FRC_NORMAL;
1249 float runewidth = win.cw;
1250 Rune rune;
1251 FT_UInt glyphidx;
1252 FcResult fcres;
1253 FcPattern *fcpattern, *fontpattern;
1254 FcFontSet *fcsets[] = { NULL };
1255 FcCharSet *fccharset;
1256 int i, f, numspecs = 0;
1257
1258 for (i = 0, xp = winx, yp = winy + font->ascent; i < len; ++i) {
1259 /* Fetch rune and mode for current glyph. */
1260 rune = glyphs[i].u;
1261 mode = glyphs[i].mode;
1262
1263 /* Skip dummy wide-character spacing. */
1264 if (mode == ATTR_WDUMMY)
1265 continue;
1266
1267 /* Determine font for glyph if different from previous glyph. */
1268 if (prevmode != mode) {
1269 prevmode = mode;
1270 font = &dc.font;
1271 frcflags = FRC_NORMAL;
1272 runewidth = win.cw * ((mode & ATTR_WIDE) ? 2.0f : 1.0f);
1273 if ((mode & ATTR_ITALIC) && (mode & ATTR_BOLD)) {
1274 font = &dc.ibfont;
1275 frcflags = FRC_ITALICBOLD;
1276 } else if (mode & ATTR_ITALIC) {
1277 font = &dc.ifont;
1278 frcflags = FRC_ITALIC;
1279 } else if (mode & ATTR_BOLD) {
1280 font = &dc.bfont;
1281 frcflags = FRC_BOLD;
1282 }
1283 yp = winy + font->ascent;
1284 }
1285
1286 /* Lookup character index with default font. */
1287 glyphidx = XftCharIndex(xw.dpy, font->match, rune);
1288 if (glyphidx) {
1289 specs[numspecs].font = font->match;
1290 specs[numspecs].glyph = glyphidx;
1291 specs[numspecs].x = (short)xp;
1292 specs[numspecs].y = (short)yp;
1293 xp += runewidth;
1294 numspecs++;
1295 continue;
1296 }
1297
1298 /* Fallback on font cache, search the font cache for match. */
1299 for (f = 0; f < frclen; f++) {
1300 glyphidx = XftCharIndex(xw.dpy, frc[f].font, rune);
1301 /* Everything correct. */
1302 if (glyphidx && frc[f].flags == frcflags)
1303 break;
1304 /* We got a default font for a not found glyph. */
1305 if (!glyphidx && frc[f].flags == frcflags
1306 && frc[f].unicodep == rune) {
1307 break;
1308 }
1309 }
1310
1311 /* Nothing was found. Use fontconfig to find matching font. */
1312 if (f >= frclen) {
1313 if (!font->set)
1314 font->set = FcFontSort(0, font->pattern,
1315 1, 0, &fcres);
1316 fcsets[0] = font->set;
1317
1318 /*
1319 * Nothing was found in the cache. Now use
1320 * some dozen of Fontconfig calls to get the
1321 * font for one single character.
1322 *
1323 * Xft and fontconfig are design failures.
1324 */
1325 fcpattern = FcPatternDuplicate(font->pattern);
1326 fccharset = FcCharSetCreate();
1327
1328 FcCharSetAddChar(fccharset, rune);
1329 FcPatternAddCharSet(fcpattern, FC_CHARSET,
1330 fccharset);
1331 FcPatternAddBool(fcpattern, FC_SCALABLE, 1);
1332
1333 FcConfigSubstitute(0, fcpattern,
1334 FcMatchPattern);
1335 FcDefaultSubstitute(fcpattern);
1336
1337 fontpattern = FcFontSetMatch(0, fcsets, 1,
1338 fcpattern, &fcres);
1339
1340 /* Allocate memory for the new cache entry. */
1341 if (frclen >= frccap) {
1342 frccap += 16;
1343 frc = xrealloc(frc, frccap * sizeof(Fontcache));
1344 }
1345
1346 frc[frclen].font = XftFontOpenPattern(xw.dpy,
1347 fontpattern);
1348 if (!frc[frclen].font)
1349 die("XftFontOpenPattern failed seeking fallback font: %s\n",
1350 strerror(errno));
1351 frc[frclen].flags = frcflags;
1352 frc[frclen].unicodep = rune;
1353
1354 glyphidx = XftCharIndex(xw.dpy, frc[frclen].font, rune);
1355
1356 f = frclen;
1357 frclen++;
1358
1359 FcPatternDestroy(fcpattern);
1360 FcCharSetDestroy(fccharset);
1361 }
1362
1363 specs[numspecs].font = frc[f].font;
1364 specs[numspecs].glyph = glyphidx;
1365 specs[numspecs].x = (short)xp;
1366 specs[numspecs].y = (short)yp;
1367 xp += runewidth;
1368 numspecs++;
1369 }
1370
1371 return numspecs;
1372 }
1373
1374 void
1375 xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, int y)
1376 {
1377 int charlen = len * ((base.mode & ATTR_WIDE) ? 2 : 1);
1378 int winx = borderpx + x * win.cw, winy = borderpx + y * win.ch,
1379 width = charlen * win.cw;
1380 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
1381 XRenderColor colfg, colbg;
1382 XRectangle r;
1383
1384 /* Fallback on color display for attributes not supported by the font */
1385 if (base.mode & ATTR_ITALIC && base.mode & ATTR_BOLD) {
1386 if (dc.ibfont.badslant || dc.ibfont.badweight)
1387 base.fg = defaultattr;
1388 } else if ((base.mode & ATTR_ITALIC && dc.ifont.badslant) ||
1389 (base.mode & ATTR_BOLD && dc.bfont.badweight)) {
1390 base.fg = defaultattr;
1391 }
1392
1393 if (IS_TRUECOL(base.fg)) {
1394 colfg.alpha = 0xffff;
1395 colfg.red = TRUERED(base.fg);
1396 colfg.green = TRUEGREEN(base.fg);
1397 colfg.blue = TRUEBLUE(base.fg);
1398 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
1399 fg = &truefg;
1400 } else {
1401 fg = &dc.col[base.fg];
1402 }
1403
1404 if (IS_TRUECOL(base.bg)) {
1405 colbg.alpha = 0xffff;
1406 colbg.green = TRUEGREEN(base.bg);
1407 colbg.red = TRUERED(base.bg);
1408 colbg.blue = TRUEBLUE(base.bg);
1409 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
1410 bg = &truebg;
1411 } else {
1412 bg = &dc.col[base.bg];
1413 }
1414
1415 /* Change basic system colors [0-7] to bright system colors [8-15] */
1416 if ((base.mode & ATTR_BOLD_FAINT) == ATTR_BOLD && BETWEEN(base.fg, 0, 7))
1417 fg = &dc.col[base.fg + 8];
1418
1419 if (IS_SET(MODE_REVERSE)) {
1420 if (fg == &dc.col[defaultfg]) {
1421 fg = &dc.col[defaultbg];
1422 } else {
1423 colfg.red = ~fg->color.red;
1424 colfg.green = ~fg->color.green;
1425 colfg.blue = ~fg->color.blue;
1426 colfg.alpha = fg->color.alpha;
1427 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
1428 &revfg);
1429 fg = &revfg;
1430 }
1431
1432 if (bg == &dc.col[defaultbg]) {
1433 bg = &dc.col[defaultfg];
1434 } else {
1435 colbg.red = ~bg->color.red;
1436 colbg.green = ~bg->color.green;
1437 colbg.blue = ~bg->color.blue;
1438 colbg.alpha = bg->color.alpha;
1439 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
1440 &revbg);
1441 bg = &revbg;
1442 }
1443 }
1444
1445 if ((base.mode & ATTR_BOLD_FAINT) == ATTR_FAINT) {
1446 colfg.red = fg->color.red / 2;
1447 colfg.green = fg->color.green / 2;
1448 colfg.blue = fg->color.blue / 2;
1449 colfg.alpha = fg->color.alpha;
1450 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
1451 fg = &revfg;
1452 }
1453
1454 if (base.mode & ATTR_REVERSE) {
1455 temp = fg;
1456 fg = bg;
1457 bg = temp;
1458 }
1459
1460 if (base.mode & ATTR_BLINK && win.mode & MODE_BLINK)
1461 fg = bg;
1462
1463 if (base.mode & ATTR_INVISIBLE)
1464 fg = bg;
1465
1466 /* Intelligent cleaning up of the borders. */
1467 if (x == 0) {
1468 xclear(0, (y == 0)? 0 : winy, borderpx,
1469 winy + win.ch +
1470 ((winy + win.ch >= borderpx + win.th)? win.h : 0));
1471 }
1472 if (winx + width >= borderpx + win.tw) {
1473 xclear(winx + width, (y == 0)? 0 : winy, win.w,
1474 ((winy + win.ch >= borderpx + win.th)? win.h : (winy + win.ch)));
1475 }
1476 if (y == 0)
1477 xclear(winx, 0, winx + width, borderpx);
1478 if (winy + win.ch >= borderpx + win.th)
1479 xclear(winx, winy + win.ch, winx + width, win.h);
1480
1481 /* Clean up the region we want to draw to. */
1482 XftDrawRect(xw.draw, bg, winx, winy, width, win.ch);
1483
1484 /* Set the clip region because Xft is sometimes dirty. */
1485 r.x = 0;
1486 r.y = 0;
1487 r.height = win.ch;
1488 r.width = width;
1489 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
1490
1491 /* Render the glyphs. */
1492 XftDrawGlyphFontSpec(xw.draw, fg, specs, len);
1493
1494 /* Render underline and strikethrough. */
1495 if (base.mode & ATTR_UNDERLINE) {
1496 XftDrawRect(xw.draw, fg, winx, winy + dc.font.ascent * chscale + 1,
1497 width, 1);
1498 }
1499
1500 if (base.mode & ATTR_STRUCK) {
1501 XftDrawRect(xw.draw, fg, winx, winy + 2 * dc.font.ascent * chscale / 3,
1502 width, 1);
1503 }
1504
1505 /* Reset clip to none. */
1506 XftDrawSetClip(xw.draw, 0);
1507 }
1508
1509 void
1510 xdrawglyph(Glyph g, int x, int y)
1511 {
1512 int numspecs;
1513 XftGlyphFontSpec spec;
1514
1515 numspecs = xmakeglyphfontspecs(&spec, &g, 1, x, y);
1516 xdrawglyphfontspecs(&spec, g, numspecs, x, y);
1517 }
1518
1519 void
1520 xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og)
1521 {
1522 Color drawcol;
1523
1524 /* remove the old cursor */
1525 if (selected(ox, oy))
1526 og.mode ^= ATTR_REVERSE;
1527 xdrawglyph(og, ox, oy);
1528
1529 if (IS_SET(MODE_HIDE))
1530 return;
1531
1532 /*
1533 * Select the right color for the right mode.
1534 */
1535 g.mode &= ATTR_BOLD|ATTR_ITALIC|ATTR_UNDERLINE|ATTR_STRUCK|ATTR_WIDE;
1536
1537 if (IS_SET(MODE_REVERSE)) {
1538 g.mode |= ATTR_REVERSE;
1539 g.bg = defaultfg;
1540 if (selected(cx, cy)) {
1541 drawcol = dc.col[defaultcs];
1542 g.fg = defaultrcs;
1543 } else {
1544 drawcol = dc.col[defaultrcs];
1545 g.fg = defaultcs;
1546 }
1547 } else {
1548 if (selected(cx, cy)) {
1549 g.fg = defaultfg;
1550 g.bg = defaultrcs;
1551 } else {
1552 g.fg = defaultbg;
1553 g.bg = defaultcs;
1554 }
1555 drawcol = dc.col[g.bg];
1556 }
1557
1558 /* draw the new one */
1559 if (IS_SET(MODE_FOCUSED)) {
1560 switch (win.cursor) {
1561 case 7: /* st extension */
1562 g.u = 0x2603; /* snowman (U+2603) */
1563 /* FALLTHROUGH */
1564 case 0: /* Blinking Block */
1565 case 1: /* Blinking Block (Default) */
1566 case 2: /* Steady Block */
1567 xdrawglyph(g, cx, cy);
1568 break;
1569 case 3: /* Blinking Underline */
1570 case 4: /* Steady Underline */
1571 XftDrawRect(xw.draw, &drawcol,
1572 borderpx + cx * win.cw,
1573 borderpx + (cy + 1) * win.ch - \
1574 cursorthickness,
1575 win.cw, cursorthickness);
1576 break;
1577 case 5: /* Blinking bar */
1578 case 6: /* Steady bar */
1579 XftDrawRect(xw.draw, &drawcol,
1580 borderpx + cx * win.cw,
1581 borderpx + cy * win.ch,
1582 cursorthickness, win.ch);
1583 break;
1584 }
1585 } else {
1586 XftDrawRect(xw.draw, &drawcol,
1587 borderpx + cx * win.cw,
1588 borderpx + cy * win.ch,
1589 win.cw - 1, 1);
1590 XftDrawRect(xw.draw, &drawcol,
1591 borderpx + cx * win.cw,
1592 borderpx + cy * win.ch,
1593 1, win.ch - 1);
1594 XftDrawRect(xw.draw, &drawcol,
1595 borderpx + (cx + 1) * win.cw - 1,
1596 borderpx + cy * win.ch,
1597 1, win.ch - 1);
1598 XftDrawRect(xw.draw, &drawcol,
1599 borderpx + cx * win.cw,
1600 borderpx + (cy + 1) * win.ch - 1,
1601 win.cw, 1);
1602 }
1603 }
1604
1605 void
1606 xsetenv(void)
1607 {
1608 char buf[sizeof(long) * 8 + 1];
1609
1610 snprintf(buf, sizeof(buf), "%lu", xw.win);
1611 setenv("WINDOWID", buf, 1);
1612 }
1613
1614 void
1615 xseticontitle(char *p)
1616 {
1617 XTextProperty prop;
1618 DEFAULT(p, opt_title);
1619
1620 if (Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
1621 &prop) != Success)
1622 return;
1623 XSetWMIconName(xw.dpy, xw.win, &prop);
1624 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmiconname);
1625 XFree(prop.value);
1626 }
1627
1628 void
1629 xsettitle(char *p)
1630 {
1631 XTextProperty prop;
1632 DEFAULT(p, opt_title);
1633
1634 if (Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
1635 &prop) != Success)
1636 return;
1637 XSetWMName(xw.dpy, xw.win, &prop);
1638 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
1639 XFree(prop.value);
1640 }
1641
1642 int
1643 xstartdraw(void)
1644 {
1645 return IS_SET(MODE_VISIBLE);
1646 }
1647
1648 void
1649 xdrawline(Line line, int x1, int y1, int x2)
1650 {
1651 int i, x, ox, numspecs;
1652 Glyph base, new;
1653 XftGlyphFontSpec *specs = xw.specbuf;
1654
1655 numspecs = xmakeglyphfontspecs(specs, &line[x1], x2 - x1, x1, y1);
1656 i = ox = 0;
1657 for (x = x1; x < x2 && i < numspecs; x++) {
1658 new = line[x];
1659 if (new.mode == ATTR_WDUMMY)
1660 continue;
1661 if (selected(x, y1))
1662 new.mode ^= ATTR_REVERSE;
1663 if (i > 0 && ATTRCMP(base, new)) {
1664 xdrawglyphfontspecs(specs, base, i, ox, y1);
1665 specs += i;
1666 numspecs -= i;
1667 i = 0;
1668 }
1669 if (i == 0) {
1670 ox = x;
1671 base = new;
1672 }
1673 i++;
1674 }
1675 if (i > 0)
1676 xdrawglyphfontspecs(specs, base, i, ox, y1);
1677 }
1678
1679 void
1680 xfinishdraw(void)
1681 {
1682 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, win.w,
1683 win.h, 0, 0);
1684 XSetForeground(xw.dpy, dc.gc,
1685 dc.col[IS_SET(MODE_REVERSE)?
1686 defaultfg : defaultbg].pixel);
1687 }
1688
1689 void
1690 xximspot(int x, int y)
1691 {
1692 if (xw.ime.xic == NULL)
1693 return;
1694
1695 xw.ime.spot.x = borderpx + x * win.cw;
1696 xw.ime.spot.y = borderpx + (y + 1) * win.ch;
1697
1698 XSetICValues(xw.ime.xic, XNPreeditAttributes, xw.ime.spotlist, NULL);
1699 }
1700
1701 void
1702 expose(XEvent *ev)
1703 {
1704 redraw();
1705 }
1706
1707 void
1708 visibility(XEvent *ev)
1709 {
1710 XVisibilityEvent *e = &ev->xvisibility;
1711
1712 MODBIT(win.mode, e->state != VisibilityFullyObscured, MODE_VISIBLE);
1713 }
1714
1715 void
1716 unmap(XEvent *ev)
1717 {
1718 win.mode &= ~MODE_VISIBLE;
1719 }
1720
1721 void
1722 xsetpointermotion(int set)
1723 {
1724 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
1725 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
1726 }
1727
1728 void
1729 xsetmode(int set, unsigned int flags)
1730 {
1731 int mode = win.mode;
1732 MODBIT(win.mode, set, flags);
1733 if ((win.mode & MODE_REVERSE) != (mode & MODE_REVERSE))
1734 redraw();
1735 }
1736
1737 int
1738 xsetcursor(int cursor)
1739 {
1740 if (!BETWEEN(cursor, 0, 7)) /* 7: st extension */
1741 return 1;
1742 win.cursor = cursor;
1743 return 0;
1744 }
1745
1746 void
1747 xseturgency(int add)
1748 {
1749 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
1750
1751 MODBIT(h->flags, add, XUrgencyHint);
1752 XSetWMHints(xw.dpy, xw.win, h);
1753 XFree(h);
1754 }
1755
1756 void
1757 xbell(void)
1758 {
1759 if (!(IS_SET(MODE_FOCUSED)))
1760 xseturgency(1);
1761 if (bellvolume)
1762 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
1763 }
1764
1765 void
1766 focus(XEvent *ev)
1767 {
1768 XFocusChangeEvent *e = &ev->xfocus;
1769
1770 if (e->mode == NotifyGrab)
1771 return;
1772
1773 if (ev->type == FocusIn) {
1774 if (xw.ime.xic)
1775 XSetICFocus(xw.ime.xic);
1776 win.mode |= MODE_FOCUSED;
1777 xseturgency(0);
1778 if (IS_SET(MODE_FOCUS))
1779 ttywrite("\033[I", 3, 0);
1780 } else {
1781 if (xw.ime.xic)
1782 XUnsetICFocus(xw.ime.xic);
1783 win.mode &= ~MODE_FOCUSED;
1784 if (IS_SET(MODE_FOCUS))
1785 ttywrite("\033[O", 3, 0);
1786 }
1787 }
1788
1789 int
1790 match(uint mask, uint state)
1791 {
1792 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
1793 }
1794
1795 char*
1796 kmap(KeySym k, uint state)
1797 {
1798 Key *kp;
1799 int i;
1800
1801 /* Check for mapped keys out of X11 function keys. */
1802 for (i = 0; i < LEN(mappedkeys); i++) {
1803 if (mappedkeys[i] == k)
1804 break;
1805 }
1806 if (i == LEN(mappedkeys)) {
1807 if ((k & 0xFFFF) < 0xFD00)
1808 return NULL;
1809 }
1810
1811 for (kp = key; kp < key + LEN(key); kp++) {
1812 if (kp->k != k)
1813 continue;
1814
1815 if (!match(kp->mask, state))
1816 continue;
1817
1818 if (IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
1819 continue;
1820 if (IS_SET(MODE_NUMLOCK) && kp->appkey == 2)
1821 continue;
1822
1823 if (IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
1824 continue;
1825
1826 return kp->s;
1827 }
1828
1829 return NULL;
1830 }
1831
1832 void
1833 kpress(XEvent *ev)
1834 {
1835 XKeyEvent *e = &ev->xkey;
1836 KeySym ksym;
1837 char buf[64], *customkey;
1838 int len;
1839 Rune c;
1840 Status status;
1841 Shortcut *bp;
1842
1843 if (IS_SET(MODE_KBDLOCK))
1844 return;
1845
1846 if (xw.ime.xic)
1847 len = XmbLookupString(xw.ime.xic, e, buf, sizeof buf, &ksym, &status);
1848 else
1849 len = XLookupString(e, buf, sizeof buf, &ksym, NULL);
1850 /* 1. shortcuts */
1851 for (bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
1852 if (ksym == bp->keysym && match(bp->mod, e->state)) {
1853 bp->func(&(bp->arg));
1854 return;
1855 }
1856 }
1857
1858 /* 2. custom keys from config.h */
1859 if ((customkey = kmap(ksym, e->state))) {
1860 ttywrite(customkey, strlen(customkey), 1);
1861 return;
1862 }
1863
1864 /* 3. composed string from input method */
1865 if (len == 0)
1866 return;
1867 if (len == 1 && e->state & Mod1Mask) {
1868 if (IS_SET(MODE_8BIT)) {
1869 if (*buf < 0177) {
1870 c = *buf | 0x80;
1871 len = utf8encode(c, buf);
1872 }
1873 } else {
1874 buf[1] = buf[0];
1875 buf[0] = '\033';
1876 len = 2;
1877 }
1878 }
1879 ttywrite(buf, len, 1);
1880 }
1881
1882 void
1883 cmessage(XEvent *e)
1884 {
1885 /*
1886 * See xembed specs
1887 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
1888 */
1889 if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
1890 if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
1891 win.mode |= MODE_FOCUSED;
1892 xseturgency(0);
1893 } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
1894 win.mode &= ~MODE_FOCUSED;
1895 }
1896 } else if (e->xclient.data.l[0] == xw.wmdeletewin) {
1897 ttyhangup();
1898 exit(0);
1899 }
1900 }
1901
1902 void
1903 resize(XEvent *e)
1904 {
1905 if (e->xconfigure.width == win.w && e->xconfigure.height == win.h)
1906 return;
1907
1908 cresize(e->xconfigure.width, e->xconfigure.height);
1909 }
1910
1911 void
1912 run(void)
1913 {
1914 XEvent ev;
1915 int w = win.w, h = win.h;
1916 fd_set rfd;
1917 int xfd = XConnectionNumber(xw.dpy), ttyfd, xev, drawing;
1918 struct timespec seltv, *tv, now, lastblink, trigger;
1919 double timeout;
1920
1921 /* Waiting for window mapping */
1922 do {
1923 XNextEvent(xw.dpy, &ev);
1924 /*
1925 * This XFilterEvent call is required because of XOpenIM. It
1926 * does filter out the key event and some client message for
1927 * the input method too.
1928 */
1929 if (XFilterEvent(&ev, None))
1930 continue;
1931 if (ev.type == ConfigureNotify) {
1932 w = ev.xconfigure.width;
1933 h = ev.xconfigure.height;
1934 }
1935 } while (ev.type != MapNotify);
1936
1937 ttyfd = ttynew(opt_line, shell, opt_io, opt_cmd);
1938 cresize(w, h);
1939
1940 for (timeout = -1, drawing = 0, lastblink = (struct timespec){0};;) {
1941 FD_ZERO(&rfd);
1942 FD_SET(ttyfd, &rfd);
1943 FD_SET(xfd, &rfd);
1944
1945 if (XPending(xw.dpy))
1946 timeout = 0; /* existing events might not set xfd */
1947
1948 seltv.tv_sec = timeout / 1E3;
1949 seltv.tv_nsec = 1E6 * (timeout - 1E3 * seltv.tv_sec);
1950 tv = timeout >= 0 ? &seltv : NULL;
1951
1952 if (pselect(MAX(xfd, ttyfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
1953 if (errno == EINTR)
1954 continue;
1955 die("select failed: %s\n", strerror(errno));
1956 }
1957 clock_gettime(CLOCK_MONOTONIC, &now);
1958
1959 if (FD_ISSET(ttyfd, &rfd))
1960 ttyread();
1961
1962 xev = 0;
1963 while (XPending(xw.dpy)) {
1964 xev = 1;
1965 XNextEvent(xw.dpy, &ev);
1966 if (XFilterEvent(&ev, None))
1967 continue;
1968 if (handler[ev.type])
1969 (handler[ev.type])(&ev);
1970 }
1971
1972 /*
1973 * To reduce flicker and tearing, when new content or event
1974 * triggers drawing, we first wait a bit to ensure we got
1975 * everything, and if nothing new arrives - we draw.
1976 * We start with trying to wait minlatency ms. If more content
1977 * arrives sooner, we retry with shorter and shorter periods,
1978 * and eventually draw even without idle after maxlatency ms.
1979 * Typically this results in low latency while interacting,
1980 * maximum latency intervals during `cat huge.txt`, and perfect
1981 * sync with periodic updates from animations/key-repeats/etc.
1982 */
1983 if (FD_ISSET(ttyfd, &rfd) || xev) {
1984 if (!drawing) {
1985 trigger = now;
1986 drawing = 1;
1987 }
1988 timeout = (maxlatency - TIMEDIFF(now, trigger)) \
1989 / maxlatency * minlatency;
1990 if (timeout > 0)
1991 continue; /* we have time, try to find idle */
1992 }
1993
1994 /* idle detected or maxlatency exhausted -> draw */
1995 timeout = -1;
1996 if (blinktimeout && tattrset(ATTR_BLINK)) {
1997 timeout = blinktimeout - TIMEDIFF(now, lastblink);
1998 if (timeout <= 0) {
1999 if (-timeout > blinktimeout) /* start visible */
2000 win.mode |= MODE_BLINK;
2001 win.mode ^= MODE_BLINK;
2002 tsetdirtattr(ATTR_BLINK);
2003 lastblink = now;
2004 timeout = blinktimeout;
2005 }
2006 }
2007
2008 draw();
2009 XFlush(xw.dpy);
2010 drawing = 0;
2011 }
2012 }
2013
2014 void
2015 usage(void)
2016 {
2017 die("usage: %s [-aiv] [-c class] [-f font] [-g geometry]"
2018 " [-n name] [-o file]\n"
2019 " [-T title] [-t title] [-w windowid]"
2020 " [[-e] command [args ...]]\n"
2021 " %s [-aiv] [-c class] [-f font] [-g geometry]"
2022 " [-n name] [-o file]\n"
2023 " [-T title] [-t title] [-w windowid] -l line"
2024 " [stty_args ...]\n", argv0, argv0);
2025 }
2026
2027 int
2028 main(int argc, char *argv[])
2029 {
2030 xw.l = xw.t = 0;
2031 xw.isfixed = False;
2032 xsetcursor(cursorshape);
2033
2034 ARGBEGIN {
2035 case 'a':
2036 allowaltscreen = 0;
2037 break;
2038 case 'c':
2039 opt_class = EARGF(usage());
2040 break;
2041 case 'e':
2042 if (argc > 0)
2043 --argc, ++argv;
2044 goto run;
2045 case 'f':
2046 opt_font = EARGF(usage());
2047 break;
2048 case 'g':
2049 xw.gm = XParseGeometry(EARGF(usage()),
2050 &xw.l, &xw.t, &cols, &rows);
2051 break;
2052 case 'i':
2053 xw.isfixed = 1;
2054 break;
2055 case 'o':
2056 opt_io = EARGF(usage());
2057 break;
2058 case 'l':
2059 opt_line = EARGF(usage());
2060 break;
2061 case 'n':
2062 opt_name = EARGF(usage());
2063 break;
2064 case 't':
2065 case 'T':
2066 opt_title = EARGF(usage());
2067 break;
2068 case 'w':
2069 opt_embed = EARGF(usage());
2070 break;
2071 case 'v':
2072 die("%s " VERSION "\n", argv0);
2073 break;
2074 default:
2075 usage();
2076 } ARGEND;
2077
2078 run:
2079 if (argc > 0) /* eat all remaining arguments */
2080 opt_cmd = argv;
2081
2082 if (!opt_title)
2083 opt_title = (opt_line || !opt_cmd) ? "st" : opt_cmd[0];
2084
2085 setlocale(LC_CTYPE, "");
2086 XSetLocaleModifiers("");
2087 cols = MAX(cols, 1);
2088 rows = MAX(rows, 1);
2089 tnew(cols, rows);
2090 xinit(cols, rows);
2091 xsetenv();
2092 selinit();
2093 run();
2094
2095 return 0;
2096 }
simple terminal