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Enforce a terminal size to reduce race conditions in too efficient apps.
[st.git] / st.c
1 /* See LICENSE for license details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdio.h>
10 #include <stdlib.h>
11 #include <string.h>
12 #include <signal.h>
13 #include <stdint.h>
14 #include <sys/ioctl.h>
15 #include <sys/select.h>
16 #include <sys/stat.h>
17 #include <sys/time.h>
18 #include <sys/types.h>
19 #include <sys/wait.h>
20 #include <termios.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <libgen.h>
24 #include <X11/Xatom.h>
25 #include <X11/Xlib.h>
26 #include <X11/Xutil.h>
27 #include <X11/cursorfont.h>
28 #include <X11/keysym.h>
29 #include <X11/Xft/Xft.h>
30 #include <X11/XKBlib.h>
31 #include <fontconfig/fontconfig.h>
32 #include <wchar.h>
33
34 #include "arg.h"
35
36 char *argv0;
37
38 #define Glyph Glyph_
39 #define Font Font_
40
41 #if defined(__linux)
42 #include <pty.h>
43 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
44 #include <util.h>
45 #elif defined(__FreeBSD__) || defined(__DragonFly__)
46 #include <libutil.h>
47 #endif
48
49
50 /* XEMBED messages */
51 #define XEMBED_FOCUS_IN 4
52 #define XEMBED_FOCUS_OUT 5
53
54 /* Arbitrary sizes */
55 #define UTF_INVALID 0xFFFD
56 #define UTF_SIZ 4
57 #define ESC_BUF_SIZ (128*UTF_SIZ)
58 #define ESC_ARG_SIZ 16
59 #define STR_BUF_SIZ ESC_BUF_SIZ
60 #define STR_ARG_SIZ ESC_ARG_SIZ
61 #define XK_ANY_MOD UINT_MAX
62 #define XK_NO_MOD 0
63 #define XK_SWITCH_MOD (1<<13)
64
65 /* macros */
66 #define MIN(a, b) ((a) < (b) ? (a) : (b))
67 #define MAX(a, b) ((a) < (b) ? (b) : (a))
68 #define LEN(a) (sizeof(a) / sizeof(a)[0])
69 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
70 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
71 #define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f) || (c) == '\177')
72 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
73 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
74 #define ISDELIM(u) (utf8strchr(worddelimiters, u) != NULL)
75 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
76 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || \
77 (a).bg != (b).bg)
78 #define IS_SET(flag) ((term.mode & (flag)) != 0)
79 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + \
80 (t1.tv_nsec-t2.tv_nsec)/1E6)
81 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
82
83 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
84 #define IS_TRUECOL(x) (1 << 24 & (x))
85 #define TRUERED(x) (((x) & 0xff0000) >> 8)
86 #define TRUEGREEN(x) (((x) & 0xff00))
87 #define TRUEBLUE(x) (((x) & 0xff) << 8)
88
89
90 enum glyph_attribute {
91 ATTR_NULL = 0,
92 ATTR_BOLD = 1 << 0,
93 ATTR_FAINT = 1 << 1,
94 ATTR_ITALIC = 1 << 2,
95 ATTR_UNDERLINE = 1 << 3,
96 ATTR_BLINK = 1 << 4,
97 ATTR_REVERSE = 1 << 5,
98 ATTR_INVISIBLE = 1 << 6,
99 ATTR_STRUCK = 1 << 7,
100 ATTR_WRAP = 1 << 8,
101 ATTR_WIDE = 1 << 9,
102 ATTR_WDUMMY = 1 << 10,
103 ATTR_BOLD_FAINT = ATTR_BOLD | ATTR_FAINT,
104 };
105
106 enum cursor_movement {
107 CURSOR_SAVE,
108 CURSOR_LOAD
109 };
110
111 enum cursor_state {
112 CURSOR_DEFAULT = 0,
113 CURSOR_WRAPNEXT = 1,
114 CURSOR_ORIGIN = 2
115 };
116
117 enum term_mode {
118 MODE_WRAP = 1 << 0,
119 MODE_INSERT = 1 << 1,
120 MODE_APPKEYPAD = 1 << 2,
121 MODE_ALTSCREEN = 1 << 3,
122 MODE_CRLF = 1 << 4,
123 MODE_MOUSEBTN = 1 << 5,
124 MODE_MOUSEMOTION = 1 << 6,
125 MODE_REVERSE = 1 << 7,
126 MODE_KBDLOCK = 1 << 8,
127 MODE_HIDE = 1 << 9,
128 MODE_ECHO = 1 << 10,
129 MODE_APPCURSOR = 1 << 11,
130 MODE_MOUSESGR = 1 << 12,
131 MODE_8BIT = 1 << 13,
132 MODE_BLINK = 1 << 14,
133 MODE_FBLINK = 1 << 15,
134 MODE_FOCUS = 1 << 16,
135 MODE_MOUSEX10 = 1 << 17,
136 MODE_MOUSEMANY = 1 << 18,
137 MODE_BRCKTPASTE = 1 << 19,
138 MODE_PRINT = 1 << 20,
139 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
140 |MODE_MOUSEMANY,
141 };
142
143 enum charset {
144 CS_GRAPHIC0,
145 CS_GRAPHIC1,
146 CS_UK,
147 CS_USA,
148 CS_MULTI,
149 CS_GER,
150 CS_FIN
151 };
152
153 enum escape_state {
154 ESC_START = 1,
155 ESC_CSI = 2,
156 ESC_STR = 4, /* DCS, OSC, PM, APC */
157 ESC_ALTCHARSET = 8,
158 ESC_STR_END = 16, /* a final string was encountered */
159 ESC_TEST = 32, /* Enter in test mode */
160 };
161
162 enum window_state {
163 WIN_VISIBLE = 1,
164 WIN_FOCUSED = 2
165 };
166
167 enum selection_mode {
168 SEL_IDLE = 0,
169 SEL_EMPTY = 1,
170 SEL_READY = 2
171 };
172
173 enum selection_type {
174 SEL_REGULAR = 1,
175 SEL_RECTANGULAR = 2
176 };
177
178 enum selection_snap {
179 SNAP_WORD = 1,
180 SNAP_LINE = 2
181 };
182
183 typedef unsigned char uchar;
184 typedef unsigned int uint;
185 typedef unsigned long ulong;
186 typedef unsigned short ushort;
187
188 typedef uint_least32_t Rune;
189
190 typedef XftDraw *Draw;
191 typedef XftColor Color;
192
193 typedef struct {
194 Rune u; /* character code */
195 ushort mode; /* attribute flags */
196 uint32_t fg; /* foreground */
197 uint32_t bg; /* background */
198 } Glyph;
199
200 typedef Glyph *Line;
201
202 typedef struct {
203 Glyph attr; /* current char attributes */
204 int x;
205 int y;
206 char state;
207 } TCursor;
208
209 /* CSI Escape sequence structs */
210 /* ESC '[' [[ [<priv>] <arg> [;]] <mode> [<mode>]] */
211 typedef struct {
212 char buf[ESC_BUF_SIZ]; /* raw string */
213 int len; /* raw string length */
214 char priv;
215 int arg[ESC_ARG_SIZ];
216 int narg; /* nb of args */
217 char mode[2];
218 } CSIEscape;
219
220 /* STR Escape sequence structs */
221 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
222 typedef struct {
223 char type; /* ESC type ... */
224 char buf[STR_BUF_SIZ]; /* raw string */
225 int len; /* raw string length */
226 char *args[STR_ARG_SIZ];
227 int narg; /* nb of args */
228 } STREscape;
229
230 /* Internal representation of the screen */
231 typedef struct {
232 int row; /* nb row */
233 int col; /* nb col */
234 Line *line; /* screen */
235 Line *alt; /* alternate screen */
236 int *dirty; /* dirtyness of lines */
237 XftGlyphFontSpec *specbuf; /* font spec buffer used for rendering */
238 TCursor c; /* cursor */
239 int top; /* top scroll limit */
240 int bot; /* bottom scroll limit */
241 int mode; /* terminal mode flags */
242 int esc; /* escape state flags */
243 char trantbl[4]; /* charset table translation */
244 int charset; /* current charset */
245 int icharset; /* selected charset for sequence */
246 int numlock; /* lock numbers in keyboard */
247 int *tabs;
248 } Term;
249
250 /* Purely graphic info */
251 typedef struct {
252 Display *dpy;
253 Colormap cmap;
254 Window win;
255 Drawable buf;
256 Atom xembed, wmdeletewin, netwmname, netwmpid;
257 XIM xim;
258 XIC xic;
259 Draw draw;
260 Visual *vis;
261 XSetWindowAttributes attrs;
262 int scr;
263 int isfixed; /* is fixed geometry? */
264 int l, t; /* left and top offset */
265 int gm; /* geometry mask */
266 int tw, th; /* tty width and height */
267 int w, h; /* window width and height */
268 int ch; /* char height */
269 int cw; /* char width */
270 char state; /* focus, redraw, visible */
271 int cursor; /* cursor style */
272 } XWindow;
273
274 typedef struct {
275 uint b;
276 uint mask;
277 char *s;
278 } MouseShortcut;
279
280 typedef struct {
281 KeySym k;
282 uint mask;
283 char *s;
284 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
285 signed char appkey; /* application keypad */
286 signed char appcursor; /* application cursor */
287 signed char crlf; /* crlf mode */
288 } Key;
289
290 typedef struct {
291 int mode;
292 int type;
293 int snap;
294 /*
295 * Selection variables:
296 * nb – normalized coordinates of the beginning of the selection
297 * ne – normalized coordinates of the end of the selection
298 * ob – original coordinates of the beginning of the selection
299 * oe – original coordinates of the end of the selection
300 */
301 struct {
302 int x, y;
303 } nb, ne, ob, oe;
304
305 char *primary, *clipboard;
306 Atom xtarget;
307 int alt;
308 struct timespec tclick1;
309 struct timespec tclick2;
310 } Selection;
311
312 typedef union {
313 int i;
314 uint ui;
315 float f;
316 const void *v;
317 } Arg;
318
319 typedef struct {
320 uint mod;
321 KeySym keysym;
322 void (*func)(const Arg *);
323 const Arg arg;
324 } Shortcut;
325
326 /* function definitions used in config.h */
327 static void clipcopy(const Arg *);
328 static void clippaste(const Arg *);
329 static void numlock(const Arg *);
330 static void selpaste(const Arg *);
331 static void xzoom(const Arg *);
332 static void xzoomabs(const Arg *);
333 static void xzoomreset(const Arg *);
334 static void printsel(const Arg *);
335 static void printscreen(const Arg *) ;
336 static void toggleprinter(const Arg *);
337 static void sendbreak(const Arg *);
338
339 /* Config.h for applying patches and the configuration. */
340 #include "config.h"
341
342 /* Font structure */
343 typedef struct {
344 int height;
345 int width;
346 int ascent;
347 int descent;
348 short lbearing;
349 short rbearing;
350 XftFont *match;
351 FcFontSet *set;
352 FcPattern *pattern;
353 } Font;
354
355 /* Drawing Context */
356 typedef struct {
357 Color col[MAX(LEN(colorname), 256)];
358 Font font, bfont, ifont, ibfont;
359 GC gc;
360 } DC;
361
362 static void die(const char *, ...);
363 static void draw(void);
364 static void redraw(void);
365 static void drawregion(int, int, int, int);
366 static void execsh(void);
367 static void stty(void);
368 static void sigchld(int);
369 static void run(void);
370
371 static void csidump(void);
372 static void csihandle(void);
373 static void csiparse(void);
374 static void csireset(void);
375 static int eschandle(uchar);
376 static void strdump(void);
377 static void strhandle(void);
378 static void strparse(void);
379 static void strreset(void);
380
381 static int tattrset(int);
382 static void tprinter(char *, size_t);
383 static void tdumpsel(void);
384 static void tdumpline(int);
385 static void tdump(void);
386 static void tclearregion(int, int, int, int);
387 static void tcursor(int);
388 static void tdeletechar(int);
389 static void tdeleteline(int);
390 static void tinsertblank(int);
391 static void tinsertblankline(int);
392 static int tlinelen(int);
393 static void tmoveto(int, int);
394 static void tmoveato(int, int);
395 static void tnew(int, int);
396 static void tnewline(int);
397 static void tputtab(int);
398 static void tputc(Rune);
399 static void treset(void);
400 static void tresize(int, int);
401 static void tscrollup(int, int);
402 static void tscrolldown(int, int);
403 static void tsetattr(int *, int);
404 static void tsetchar(Rune, Glyph *, int, int);
405 static void tsetscroll(int, int);
406 static void tswapscreen(void);
407 static void tsetdirt(int, int);
408 static void tsetdirtattr(int);
409 static void tsetmode(int, int, int *, int);
410 static void tfulldirt(void);
411 static void techo(Rune);
412 static void tcontrolcode(uchar );
413 static void tdectest(char );
414 static int32_t tdefcolor(int *, int *, int);
415 static void tdeftran(char);
416 static inline int match(uint, uint);
417 static void ttynew(void);
418 static size_t ttyread(void);
419 static void ttyresize(void);
420 static void ttysend(char *, size_t);
421 static void ttywrite(const char *, size_t);
422 static void tstrsequence(uchar);
423
424 static inline ushort sixd_to_16bit(int);
425 static int xmakeglyphfontspecs(XftGlyphFontSpec *, const Glyph *, int, int, int);
426 static void xdrawglyphfontspecs(const XftGlyphFontSpec *, Glyph, int, int, int);
427 static void xdrawglyph(Glyph, int, int);
428 static void xhints(void);
429 static void xclear(int, int, int, int);
430 static void xdrawcursor(void);
431 static void xinit(void);
432 static void xloadcols(void);
433 static int xsetcolorname(int, const char *);
434 static int xgeommasktogravity(int);
435 static int xloadfont(Font *, FcPattern *);
436 static void xloadfonts(char *, double);
437 static void xsettitle(char *);
438 static void xresettitle(void);
439 static void xsetpointermotion(int);
440 static void xseturgency(int);
441 static void xsetsel(char *, Time);
442 static void xtermclear(int, int, int, int);
443 static void xunloadfont(Font *);
444 static void xunloadfonts(void);
445 static void xresize(int, int);
446
447 static void expose(XEvent *);
448 static void visibility(XEvent *);
449 static void unmap(XEvent *);
450 static char *kmap(KeySym, uint);
451 static void kpress(XEvent *);
452 static void cmessage(XEvent *);
453 static void cresize(int, int);
454 static void resize(XEvent *);
455 static void focus(XEvent *);
456 static void brelease(XEvent *);
457 static void bpress(XEvent *);
458 static void bmotion(XEvent *);
459 static void propnotify(XEvent *);
460 static void selnotify(XEvent *);
461 static void selclear(XEvent *);
462 static void selrequest(XEvent *);
463
464 static void selinit(void);
465 static void selnormalize(void);
466 static inline int selected(int, int);
467 static char *getsel(void);
468 static void selcopy(Time);
469 static void selscroll(int, int);
470 static void selsnap(int *, int *, int);
471 static int x2col(int);
472 static int y2row(int);
473 static void getbuttoninfo(XEvent *);
474 static void mousereport(XEvent *);
475
476 static size_t utf8decode(char *, Rune *, size_t);
477 static Rune utf8decodebyte(char, size_t *);
478 static size_t utf8encode(Rune, char *);
479 static char utf8encodebyte(Rune, size_t);
480 static char *utf8strchr(char *s, Rune u);
481 static size_t utf8validate(Rune *, size_t);
482
483 static ssize_t xwrite(int, const char *, size_t);
484 static void *xmalloc(size_t);
485 static void *xrealloc(void *, size_t);
486 static char *xstrdup(char *);
487
488 static void usage(void);
489
490 static void (*handler[LASTEvent])(XEvent *) = {
491 [KeyPress] = kpress,
492 [ClientMessage] = cmessage,
493 [ConfigureNotify] = resize,
494 [VisibilityNotify] = visibility,
495 [UnmapNotify] = unmap,
496 [Expose] = expose,
497 [FocusIn] = focus,
498 [FocusOut] = focus,
499 [MotionNotify] = bmotion,
500 [ButtonPress] = bpress,
501 [ButtonRelease] = brelease,
502 /*
503 * Uncomment if you want the selection to disappear when you select something
504 * different in another window.
505 */
506 /* [SelectionClear] = selclear, */
507 [SelectionNotify] = selnotify,
508 /*
509 * PropertyNotify is only turned on when there is some INCR transfer happening
510 * for the selection retrieval.
511 */
512 [PropertyNotify] = propnotify,
513 [SelectionRequest] = selrequest,
514 };
515
516 /* Globals */
517 static DC dc;
518 static XWindow xw;
519 static Term term;
520 static CSIEscape csiescseq;
521 static STREscape strescseq;
522 static int cmdfd;
523 static pid_t pid;
524 static Selection sel;
525 static int iofd = 1;
526 static char **opt_cmd = NULL;
527 static char *opt_io = NULL;
528 static char *opt_title = NULL;
529 static char *opt_embed = NULL;
530 static char *opt_class = NULL;
531 static char *opt_font = NULL;
532 static char *opt_line = NULL;
533 static int oldbutton = 3; /* button event on startup: 3 = release */
534
535 static char *usedfont = NULL;
536 static double usedfontsize = 0;
537 static double defaultfontsize = 0;
538
539 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
540 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
541 static Rune utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
542 static Rune utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
543
544 /* Font Ring Cache */
545 enum {
546 FRC_NORMAL,
547 FRC_ITALIC,
548 FRC_BOLD,
549 FRC_ITALICBOLD
550 };
551
552 typedef struct {
553 XftFont *font;
554 int flags;
555 Rune unicodep;
556 } Fontcache;
557
558 /* Fontcache is an array now. A new font will be appended to the array. */
559 static Fontcache frc[16];
560 static int frclen = 0;
561
562 ssize_t
563 xwrite(int fd, const char *s, size_t len)
564 {
565 size_t aux = len;
566 ssize_t r;
567
568 while (len > 0) {
569 r = write(fd, s, len);
570 if (r < 0)
571 return r;
572 len -= r;
573 s += r;
574 }
575
576 return aux;
577 }
578
579 void *
580 xmalloc(size_t len)
581 {
582 void *p = malloc(len);
583
584 if (!p)
585 die("Out of memory\n");
586
587 return p;
588 }
589
590 void *
591 xrealloc(void *p, size_t len)
592 {
593 if ((p = realloc(p, len)) == NULL)
594 die("Out of memory\n");
595
596 return p;
597 }
598
599 char *
600 xstrdup(char *s)
601 {
602 if ((s = strdup(s)) == NULL)
603 die("Out of memory\n");
604
605 return s;
606 }
607
608 size_t
609 utf8decode(char *c, Rune *u, size_t clen)
610 {
611 size_t i, j, len, type;
612 Rune udecoded;
613
614 *u = UTF_INVALID;
615 if (!clen)
616 return 0;
617 udecoded = utf8decodebyte(c[0], &len);
618 if (!BETWEEN(len, 1, UTF_SIZ))
619 return 1;
620 for (i = 1, j = 1; i < clen && j < len; ++i, ++j) {
621 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
622 if (type != 0)
623 return j;
624 }
625 if (j < len)
626 return 0;
627 *u = udecoded;
628 utf8validate(u, len);
629
630 return len;
631 }
632
633 Rune
634 utf8decodebyte(char c, size_t *i)
635 {
636 for (*i = 0; *i < LEN(utfmask); ++(*i))
637 if (((uchar)c & utfmask[*i]) == utfbyte[*i])
638 return (uchar)c & ~utfmask[*i];
639
640 return 0;
641 }
642
643 size_t
644 utf8encode(Rune u, char *c)
645 {
646 size_t len, i;
647
648 len = utf8validate(&u, 0);
649 if (len > UTF_SIZ)
650 return 0;
651
652 for (i = len - 1; i != 0; --i) {
653 c[i] = utf8encodebyte(u, 0);
654 u >>= 6;
655 }
656 c[0] = utf8encodebyte(u, len);
657
658 return len;
659 }
660
661 char
662 utf8encodebyte(Rune u, size_t i)
663 {
664 return utfbyte[i] | (u & ~utfmask[i]);
665 }
666
667 char *
668 utf8strchr(char *s, Rune u)
669 {
670 Rune r;
671 size_t i, j, len;
672
673 len = strlen(s);
674 for (i = 0, j = 0; i < len; i += j) {
675 if (!(j = utf8decode(&s[i], &r, len - i)))
676 break;
677 if (r == u)
678 return &(s[i]);
679 }
680
681 return NULL;
682 }
683
684 size_t
685 utf8validate(Rune *u, size_t i)
686 {
687 if (!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
688 *u = UTF_INVALID;
689 for (i = 1; *u > utfmax[i]; ++i)
690 ;
691
692 return i;
693 }
694
695 void
696 selinit(void)
697 {
698 clock_gettime(CLOCK_MONOTONIC, &sel.tclick1);
699 clock_gettime(CLOCK_MONOTONIC, &sel.tclick2);
700 sel.mode = SEL_IDLE;
701 sel.snap = 0;
702 sel.ob.x = -1;
703 sel.primary = NULL;
704 sel.clipboard = NULL;
705 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
706 if (sel.xtarget == None)
707 sel.xtarget = XA_STRING;
708 }
709
710 int
711 x2col(int x)
712 {
713 x -= borderpx;
714 x /= xw.cw;
715
716 return LIMIT(x, 0, term.col-1);
717 }
718
719 int
720 y2row(int y)
721 {
722 y -= borderpx;
723 y /= xw.ch;
724
725 return LIMIT(y, 0, term.row-1);
726 }
727
728 int
729 tlinelen(int y)
730 {
731 int i = term.col;
732
733 if (term.line[y][i - 1].mode & ATTR_WRAP)
734 return i;
735
736 while (i > 0 && term.line[y][i - 1].u == ' ')
737 --i;
738
739 return i;
740 }
741
742 void
743 selnormalize(void)
744 {
745 int i;
746
747 if (sel.type == SEL_REGULAR && sel.ob.y != sel.oe.y) {
748 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
749 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
750 } else {
751 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
752 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
753 }
754 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
755 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
756
757 selsnap(&sel.nb.x, &sel.nb.y, -1);
758 selsnap(&sel.ne.x, &sel.ne.y, +1);
759
760 /* expand selection over line breaks */
761 if (sel.type == SEL_RECTANGULAR)
762 return;
763 i = tlinelen(sel.nb.y);
764 if (i < sel.nb.x)
765 sel.nb.x = i;
766 if (tlinelen(sel.ne.y) <= sel.ne.x)
767 sel.ne.x = term.col - 1;
768 }
769
770 int
771 selected(int x, int y)
772 {
773 if (sel.mode == SEL_EMPTY)
774 return 0;
775
776 if (sel.type == SEL_RECTANGULAR)
777 return BETWEEN(y, sel.nb.y, sel.ne.y)
778 && BETWEEN(x, sel.nb.x, sel.ne.x);
779
780 return BETWEEN(y, sel.nb.y, sel.ne.y)
781 && (y != sel.nb.y || x >= sel.nb.x)
782 && (y != sel.ne.y || x <= sel.ne.x);
783 }
784
785 void
786 selsnap(int *x, int *y, int direction)
787 {
788 int newx, newy, xt, yt;
789 int delim, prevdelim;
790 Glyph *gp, *prevgp;
791
792 switch (sel.snap) {
793 case SNAP_WORD:
794 /*
795 * Snap around if the word wraps around at the end or
796 * beginning of a line.
797 */
798 prevgp = &term.line[*y][*x];
799 prevdelim = ISDELIM(prevgp->u);
800 for (;;) {
801 newx = *x + direction;
802 newy = *y;
803 if (!BETWEEN(newx, 0, term.col - 1)) {
804 newy += direction;
805 newx = (newx + term.col) % term.col;
806 if (!BETWEEN(newy, 0, term.row - 1))
807 break;
808
809 if (direction > 0)
810 yt = *y, xt = *x;
811 else
812 yt = newy, xt = newx;
813 if (!(term.line[yt][xt].mode & ATTR_WRAP))
814 break;
815 }
816
817 if (newx >= tlinelen(newy))
818 break;
819
820 gp = &term.line[newy][newx];
821 delim = ISDELIM(gp->u);
822 if (!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
823 || (delim && gp->u != prevgp->u)))
824 break;
825
826 *x = newx;
827 *y = newy;
828 prevgp = gp;
829 prevdelim = delim;
830 }
831 break;
832 case SNAP_LINE:
833 /*
834 * Snap around if the the previous line or the current one
835 * has set ATTR_WRAP at its end. Then the whole next or
836 * previous line will be selected.
837 */
838 *x = (direction < 0) ? 0 : term.col - 1;
839 if (direction < 0) {
840 for (; *y > 0; *y += direction) {
841 if (!(term.line[*y-1][term.col-1].mode
842 & ATTR_WRAP)) {
843 break;
844 }
845 }
846 } else if (direction > 0) {
847 for (; *y < term.row-1; *y += direction) {
848 if (!(term.line[*y][term.col-1].mode
849 & ATTR_WRAP)) {
850 break;
851 }
852 }
853 }
854 break;
855 }
856 }
857
858 void
859 getbuttoninfo(XEvent *e)
860 {
861 int type;
862 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
863
864 sel.alt = IS_SET(MODE_ALTSCREEN);
865
866 sel.oe.x = x2col(e->xbutton.x);
867 sel.oe.y = y2row(e->xbutton.y);
868 selnormalize();
869
870 sel.type = SEL_REGULAR;
871 for (type = 1; type < LEN(selmasks); ++type) {
872 if (match(selmasks[type], state)) {
873 sel.type = type;
874 break;
875 }
876 }
877 }
878
879 void
880 mousereport(XEvent *e)
881 {
882 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
883 button = e->xbutton.button, state = e->xbutton.state,
884 len;
885 char buf[40];
886 static int ox, oy;
887
888 /* from urxvt */
889 if (e->xbutton.type == MotionNotify) {
890 if (x == ox && y == oy)
891 return;
892 if (!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
893 return;
894 /* MOUSE_MOTION: no reporting if no button is pressed */
895 if (IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
896 return;
897
898 button = oldbutton + 32;
899 ox = x;
900 oy = y;
901 } else {
902 if (!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
903 button = 3;
904 } else {
905 button -= Button1;
906 if (button >= 3)
907 button += 64 - 3;
908 }
909 if (e->xbutton.type == ButtonPress) {
910 oldbutton = button;
911 ox = x;
912 oy = y;
913 } else if (e->xbutton.type == ButtonRelease) {
914 oldbutton = 3;
915 /* MODE_MOUSEX10: no button release reporting */
916 if (IS_SET(MODE_MOUSEX10))
917 return;
918 if (button == 64 || button == 65)
919 return;
920 }
921 }
922
923 if (!IS_SET(MODE_MOUSEX10)) {
924 button += ((state & ShiftMask ) ? 4 : 0)
925 + ((state & Mod4Mask ) ? 8 : 0)
926 + ((state & ControlMask) ? 16 : 0);
927 }
928
929 if (IS_SET(MODE_MOUSESGR)) {
930 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
931 button, x+1, y+1,
932 e->xbutton.type == ButtonRelease ? 'm' : 'M');
933 } else if (x < 223 && y < 223) {
934 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
935 32+button, 32+x+1, 32+y+1);
936 } else {
937 return;
938 }
939
940 ttywrite(buf, len);
941 }
942
943 void
944 bpress(XEvent *e)
945 {
946 struct timespec now;
947 MouseShortcut *ms;
948
949 if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
950 mousereport(e);
951 return;
952 }
953
954 for (ms = mshortcuts; ms < mshortcuts + LEN(mshortcuts); ms++) {
955 if (e->xbutton.button == ms->b
956 && match(ms->mask, e->xbutton.state)) {
957 ttysend(ms->s, strlen(ms->s));
958 return;
959 }
960 }
961
962 if (e->xbutton.button == Button1) {
963 clock_gettime(CLOCK_MONOTONIC, &now);
964
965 /* Clear previous selection, logically and visually. */
966 selclear(NULL);
967 sel.mode = SEL_EMPTY;
968 sel.type = SEL_REGULAR;
969 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
970 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
971
972 /*
973 * If the user clicks below predefined timeouts specific
974 * snapping behaviour is exposed.
975 */
976 if (TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
977 sel.snap = SNAP_LINE;
978 } else if (TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
979 sel.snap = SNAP_WORD;
980 } else {
981 sel.snap = 0;
982 }
983 selnormalize();
984
985 if (sel.snap != 0)
986 sel.mode = SEL_READY;
987 tsetdirt(sel.nb.y, sel.ne.y);
988 sel.tclick2 = sel.tclick1;
989 sel.tclick1 = now;
990 }
991 }
992
993 char *
994 getsel(void)
995 {
996 char *str, *ptr;
997 int y, bufsize, lastx, linelen;
998 Glyph *gp, *last;
999
1000 if (sel.ob.x == -1)
1001 return NULL;
1002
1003 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
1004 ptr = str = xmalloc(bufsize);
1005
1006 /* append every set & selected glyph to the selection */
1007 for (y = sel.nb.y; y <= sel.ne.y; y++) {
1008 if ((linelen = tlinelen(y)) == 0) {
1009 *ptr++ = '\n';
1010 continue;
1011 }
1012
1013 if (sel.type == SEL_RECTANGULAR) {
1014 gp = &term.line[y][sel.nb.x];
1015 lastx = sel.ne.x;
1016 } else {
1017 gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
1018 lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
1019 }
1020 last = &term.line[y][MIN(lastx, linelen-1)];
1021 while (last >= gp && last->u == ' ')
1022 --last;
1023
1024 for ( ; gp <= last; ++gp) {
1025 if (gp->mode & ATTR_WDUMMY)
1026 continue;
1027
1028 ptr += utf8encode(gp->u, ptr);
1029 }
1030
1031 /*
1032 * Copy and pasting of line endings is inconsistent
1033 * in the inconsistent terminal and GUI world.
1034 * The best solution seems like to produce '\n' when
1035 * something is copied from st and convert '\n' to
1036 * '\r', when something to be pasted is received by
1037 * st.
1038 * FIXME: Fix the computer world.
1039 */
1040 if ((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
1041 *ptr++ = '\n';
1042 }
1043 *ptr = 0;
1044 return str;
1045 }
1046
1047 void
1048 selcopy(Time t)
1049 {
1050 xsetsel(getsel(), t);
1051 }
1052
1053 void
1054 propnotify(XEvent *e)
1055 {
1056 XPropertyEvent *xpev;
1057 Atom clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1058
1059 xpev = &e->xproperty;
1060 if (xpev->state == PropertyNewValue &&
1061 (xpev->atom == XA_PRIMARY ||
1062 xpev->atom == clipboard)) {
1063 selnotify(e);
1064 }
1065 }
1066
1067 void
1068 selnotify(XEvent *e)
1069 {
1070 ulong nitems, ofs, rem;
1071 int format;
1072 uchar *data, *last, *repl;
1073 Atom type, incratom, property;
1074
1075 incratom = XInternAtom(xw.dpy, "INCR", 0);
1076
1077 ofs = 0;
1078 if (e->type == SelectionNotify) {
1079 property = e->xselection.property;
1080 } else if(e->type == PropertyNotify) {
1081 property = e->xproperty.atom;
1082 } else {
1083 return;
1084 }
1085 if (property == None)
1086 return;
1087
1088 do {
1089 if (XGetWindowProperty(xw.dpy, xw.win, property, ofs,
1090 BUFSIZ/4, False, AnyPropertyType,
1091 &type, &format, &nitems, &rem,
1092 &data)) {
1093 fprintf(stderr, "Clipboard allocation failed\n");
1094 return;
1095 }
1096
1097 if (e->type == PropertyNotify && nitems == 0 && rem == 0) {
1098 /*
1099 * If there is some PropertyNotify with no data, then
1100 * this is the signal of the selection owner that all
1101 * data has been transferred. We won't need to receive
1102 * PropertyNotify events anymore.
1103 */
1104 MODBIT(xw.attrs.event_mask, 0, PropertyChangeMask);
1105 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
1106 &xw.attrs);
1107 }
1108
1109 if (type == incratom) {
1110 /*
1111 * Activate the PropertyNotify events so we receive
1112 * when the selection owner does send us the next
1113 * chunk of data.
1114 */
1115 MODBIT(xw.attrs.event_mask, 1, PropertyChangeMask);
1116 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
1117 &xw.attrs);
1118
1119 /*
1120 * Deleting the property is the transfer start signal.
1121 */
1122 XDeleteProperty(xw.dpy, xw.win, (int)property);
1123 continue;
1124 }
1125
1126 /*
1127 * As seen in getsel:
1128 * Line endings are inconsistent in the terminal and GUI world
1129 * copy and pasting. When receiving some selection data,
1130 * replace all '\n' with '\r'.
1131 * FIXME: Fix the computer world.
1132 */
1133 repl = data;
1134 last = data + nitems * format / 8;
1135 while ((repl = memchr(repl, '\n', last - repl))) {
1136 *repl++ = '\r';
1137 }
1138
1139 if (IS_SET(MODE_BRCKTPASTE) && ofs == 0)
1140 ttywrite("\033[200~", 6);
1141 ttysend((char *)data, nitems * format / 8);
1142 if (IS_SET(MODE_BRCKTPASTE) && rem == 0)
1143 ttywrite("\033[201~", 6);
1144 XFree(data);
1145 /* number of 32-bit chunks returned */
1146 ofs += nitems * format / 32;
1147 } while (rem > 0);
1148
1149 /*
1150 * Deleting the property again tells the selection owner to send the
1151 * next data chunk in the property.
1152 */
1153 if (e->type == PropertyNotify)
1154 XDeleteProperty(xw.dpy, xw.win, (int)property);
1155 }
1156
1157 void
1158 selpaste(const Arg *dummy)
1159 {
1160 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1161 xw.win, CurrentTime);
1162 }
1163
1164 void
1165 clipcopy(const Arg *dummy)
1166 {
1167 Atom clipboard;
1168
1169 if (sel.clipboard != NULL)
1170 free(sel.clipboard);
1171
1172 if (sel.primary != NULL) {
1173 sel.clipboard = xstrdup(sel.primary);
1174 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1175 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1176 }
1177 }
1178
1179 void
1180 clippaste(const Arg *dummy)
1181 {
1182 Atom clipboard;
1183
1184 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1185 XConvertSelection(xw.dpy, clipboard, sel.xtarget, clipboard,
1186 xw.win, CurrentTime);
1187 }
1188
1189 void
1190 selclear(XEvent *e)
1191 {
1192 if (sel.ob.x == -1)
1193 return;
1194 sel.mode = SEL_IDLE;
1195 sel.ob.x = -1;
1196 tsetdirt(sel.nb.y, sel.ne.y);
1197 }
1198
1199 void
1200 selrequest(XEvent *e)
1201 {
1202 XSelectionRequestEvent *xsre;
1203 XSelectionEvent xev;
1204 Atom xa_targets, string, clipboard;
1205 char *seltext;
1206
1207 xsre = (XSelectionRequestEvent *) e;
1208 xev.type = SelectionNotify;
1209 xev.requestor = xsre->requestor;
1210 xev.selection = xsre->selection;
1211 xev.target = xsre->target;
1212 xev.time = xsre->time;
1213 if (xsre->property == None)
1214 xsre->property = xsre->target;
1215
1216 /* reject */
1217 xev.property = None;
1218
1219 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1220 if (xsre->target == xa_targets) {
1221 /* respond with the supported type */
1222 string = sel.xtarget;
1223 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1224 XA_ATOM, 32, PropModeReplace,
1225 (uchar *) &string, 1);
1226 xev.property = xsre->property;
1227 } else if (xsre->target == sel.xtarget || xsre->target == XA_STRING) {
1228 /*
1229 * xith XA_STRING non ascii characters may be incorrect in the
1230 * requestor. It is not our problem, use utf8.
1231 */
1232 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1233 if (xsre->selection == XA_PRIMARY) {
1234 seltext = sel.primary;
1235 } else if (xsre->selection == clipboard) {
1236 seltext = sel.clipboard;
1237 } else {
1238 fprintf(stderr,
1239 "Unhandled clipboard selection 0x%lx\n",
1240 xsre->selection);
1241 return;
1242 }
1243 if (seltext != NULL) {
1244 XChangeProperty(xsre->display, xsre->requestor,
1245 xsre->property, xsre->target,
1246 8, PropModeReplace,
1247 (uchar *)seltext, strlen(seltext));
1248 xev.property = xsre->property;
1249 }
1250 }
1251
1252 /* all done, send a notification to the listener */
1253 if (!XSendEvent(xsre->display, xsre->requestor, 1, 0, (XEvent *) &xev))
1254 fprintf(stderr, "Error sending SelectionNotify event\n");
1255 }
1256
1257 void
1258 xsetsel(char *str, Time t)
1259 {
1260 free(sel.primary);
1261 sel.primary = str;
1262
1263 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
1264 if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
1265 selclear(0);
1266 }
1267
1268 void
1269 brelease(XEvent *e)
1270 {
1271 if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1272 mousereport(e);
1273 return;
1274 }
1275
1276 if (e->xbutton.button == Button2) {
1277 selpaste(NULL);
1278 } else if (e->xbutton.button == Button1) {
1279 if (sel.mode == SEL_READY) {
1280 getbuttoninfo(e);
1281 selcopy(e->xbutton.time);
1282 } else
1283 selclear(NULL);
1284 sel.mode = SEL_IDLE;
1285 tsetdirt(sel.nb.y, sel.ne.y);
1286 }
1287 }
1288
1289 void
1290 bmotion(XEvent *e)
1291 {
1292 int oldey, oldex, oldsby, oldsey;
1293
1294 if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1295 mousereport(e);
1296 return;
1297 }
1298
1299 if (!sel.mode)
1300 return;
1301
1302 sel.mode = SEL_READY;
1303 oldey = sel.oe.y;
1304 oldex = sel.oe.x;
1305 oldsby = sel.nb.y;
1306 oldsey = sel.ne.y;
1307 getbuttoninfo(e);
1308
1309 if (oldey != sel.oe.y || oldex != sel.oe.x)
1310 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1311 }
1312
1313 void
1314 die(const char *errstr, ...)
1315 {
1316 va_list ap;
1317
1318 va_start(ap, errstr);
1319 vfprintf(stderr, errstr, ap);
1320 va_end(ap);
1321 exit(1);
1322 }
1323
1324 void
1325 execsh(void)
1326 {
1327 char **args, *sh, *prog;
1328 const struct passwd *pw;
1329 char buf[sizeof(long) * 8 + 1];
1330
1331 errno = 0;
1332 if ((pw = getpwuid(getuid())) == NULL) {
1333 if (errno)
1334 die("getpwuid:%s\n", strerror(errno));
1335 else
1336 die("who are you?\n");
1337 }
1338
1339 if ((sh = getenv("SHELL")) == NULL)
1340 sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
1341
1342 if (opt_cmd)
1343 prog = opt_cmd[0];
1344 else if (utmp)
1345 prog = utmp;
1346 else
1347 prog = sh;
1348 args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
1349
1350 snprintf(buf, sizeof(buf), "%lu", xw.win);
1351
1352 unsetenv("COLUMNS");
1353 unsetenv("LINES");
1354 unsetenv("TERMCAP");
1355 setenv("LOGNAME", pw->pw_name, 1);
1356 setenv("USER", pw->pw_name, 1);
1357 setenv("SHELL", sh, 1);
1358 setenv("HOME", pw->pw_dir, 1);
1359 setenv("TERM", termname, 1);
1360 setenv("WINDOWID", buf, 1);
1361
1362 signal(SIGCHLD, SIG_DFL);
1363 signal(SIGHUP, SIG_DFL);
1364 signal(SIGINT, SIG_DFL);
1365 signal(SIGQUIT, SIG_DFL);
1366 signal(SIGTERM, SIG_DFL);
1367 signal(SIGALRM, SIG_DFL);
1368
1369 execvp(prog, args);
1370 _exit(1);
1371 }
1372
1373 void
1374 sigchld(int a)
1375 {
1376 int stat;
1377 pid_t p;
1378
1379 if ((p = waitpid(pid, &stat, WNOHANG)) < 0)
1380 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1381
1382 if (pid != p)
1383 return;
1384
1385 if (!WIFEXITED(stat) || WEXITSTATUS(stat))
1386 die("child finished with error '%d'\n", stat);
1387 exit(0);
1388 }
1389
1390
1391 void
1392 stty(void)
1393 {
1394 char cmd[_POSIX_ARG_MAX], **p, *q, *s;
1395 size_t n, siz;
1396
1397 if ((n = strlen(stty_args)) > sizeof(cmd)-1)
1398 die("incorrect stty parameters\n");
1399 memcpy(cmd, stty_args, n);
1400 q = cmd + n;
1401 siz = sizeof(cmd) - n;
1402 for (p = opt_cmd; p && (s = *p); ++p) {
1403 if ((n = strlen(s)) > siz-1)
1404 die("stty parameter length too long\n");
1405 *q++ = ' ';
1406 q = memcpy(q, s, n);
1407 q += n;
1408 siz-= n + 1;
1409 }
1410 *q = '\0';
1411 if (system(cmd) != 0)
1412 perror("Couldn't call stty");
1413 }
1414
1415 void
1416 ttynew(void)
1417 {
1418 int m, s;
1419 struct winsize w = {term.row, term.col, 0, 0};
1420
1421 if (opt_io) {
1422 term.mode |= MODE_PRINT;
1423 iofd = (!strcmp(opt_io, "-")) ?
1424 1 : open(opt_io, O_WRONLY | O_CREAT, 0666);
1425 if (iofd < 0) {
1426 fprintf(stderr, "Error opening %s:%s\n",
1427 opt_io, strerror(errno));
1428 }
1429 }
1430
1431 if (opt_line) {
1432 if ((cmdfd = open(opt_line, O_RDWR)) < 0)
1433 die("open line failed: %s\n", strerror(errno));
1434 dup2(cmdfd, 0);
1435 stty();
1436 return;
1437 }
1438
1439 /* seems to work fine on linux, openbsd and freebsd */
1440 if (openpty(&m, &s, NULL, NULL, &w) < 0)
1441 die("openpty failed: %s\n", strerror(errno));
1442
1443 ttyresize();
1444
1445 switch (pid = fork()) {
1446 case -1:
1447 die("fork failed\n");
1448 break;
1449 case 0:
1450 close(iofd);
1451 setsid(); /* create a new process group */
1452 dup2(s, 0);
1453 dup2(s, 1);
1454 dup2(s, 2);
1455 if (ioctl(s, TIOCSCTTY, NULL) < 0)
1456 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1457 close(s);
1458 close(m);
1459 execsh();
1460 break;
1461 default:
1462 close(s);
1463 cmdfd = m;
1464 signal(SIGCHLD, sigchld);
1465 break;
1466 }
1467 }
1468
1469 size_t
1470 ttyread(void)
1471 {
1472 static char buf[BUFSIZ];
1473 static int buflen = 0;
1474 char *ptr;
1475 int charsize; /* size of utf8 char in bytes */
1476 Rune unicodep;
1477 int ret;
1478
1479 /* append read bytes to unprocessed bytes */
1480 if ((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1481 die("Couldn't read from shell: %s\n", strerror(errno));
1482
1483 /* process every complete utf8 char */
1484 buflen += ret;
1485 ptr = buf;
1486 while ((charsize = utf8decode(ptr, &unicodep, buflen))) {
1487 tputc(unicodep);
1488 ptr += charsize;
1489 buflen -= charsize;
1490 }
1491
1492 /* keep any uncomplete utf8 char for the next call */
1493 memmove(buf, ptr, buflen);
1494
1495 return ret;
1496 }
1497
1498 void
1499 ttywrite(const char *s, size_t n)
1500 {
1501 fd_set wfd, rfd;
1502 ssize_t r;
1503 size_t lim = 256;
1504
1505 /*
1506 * Remember that we are using a pty, which might be a modem line.
1507 * Writing too much will clog the line. That's why we are doing this
1508 * dance.
1509 * FIXME: Migrate the world to Plan 9.
1510 */
1511 while (n > 0) {
1512 FD_ZERO(&wfd);
1513 FD_ZERO(&rfd);
1514 FD_SET(cmdfd, &wfd);
1515 FD_SET(cmdfd, &rfd);
1516
1517 /* Check if we can write. */
1518 if (pselect(cmdfd+1, &rfd, &wfd, NULL, NULL, NULL) < 0) {
1519 if (errno == EINTR)
1520 continue;
1521 die("select failed: %s\n", strerror(errno));
1522 }
1523 if (FD_ISSET(cmdfd, &wfd)) {
1524 /*
1525 * Only write the bytes written by ttywrite() or the
1526 * default of 256. This seems to be a reasonable value
1527 * for a serial line. Bigger values might clog the I/O.
1528 */
1529 if ((r = write(cmdfd, s, (n < lim)? n : lim)) < 0)
1530 goto write_error;
1531 if (r < n) {
1532 /*
1533 * We weren't able to write out everything.
1534 * This means the buffer is getting full
1535 * again. Empty it.
1536 */
1537 if (n < lim)
1538 lim = ttyread();
1539 n -= r;
1540 s += r;
1541 } else {
1542 /* All bytes have been written. */
1543 break;
1544 }
1545 }
1546 if (FD_ISSET(cmdfd, &rfd))
1547 lim = ttyread();
1548 }
1549 return;
1550
1551 write_error:
1552 die("write error on tty: %s\n", strerror(errno));
1553 }
1554
1555 void
1556 ttysend(char *s, size_t n)
1557 {
1558 int len;
1559 Rune u;
1560
1561 ttywrite(s, n);
1562 if (IS_SET(MODE_ECHO))
1563 while ((len = utf8decode(s, &u, n)) > 0) {
1564 techo(u);
1565 n -= len;
1566 s += len;
1567 }
1568 }
1569
1570 void
1571 ttyresize(void)
1572 {
1573 struct winsize w;
1574
1575 w.ws_row = term.row;
1576 w.ws_col = term.col;
1577 w.ws_xpixel = xw.tw;
1578 w.ws_ypixel = xw.th;
1579 if (ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1580 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1581 }
1582
1583 int
1584 tattrset(int attr)
1585 {
1586 int i, j;
1587
1588 for (i = 0; i < term.row-1; i++) {
1589 for (j = 0; j < term.col-1; j++) {
1590 if (term.line[i][j].mode & attr)
1591 return 1;
1592 }
1593 }
1594
1595 return 0;
1596 }
1597
1598 void
1599 tsetdirt(int top, int bot)
1600 {
1601 int i;
1602
1603 LIMIT(top, 0, term.row-1);
1604 LIMIT(bot, 0, term.row-1);
1605
1606 for (i = top; i <= bot; i++)
1607 term.dirty[i] = 1;
1608 }
1609
1610 void
1611 tsetdirtattr(int attr)
1612 {
1613 int i, j;
1614
1615 for (i = 0; i < term.row-1; i++) {
1616 for (j = 0; j < term.col-1; j++) {
1617 if (term.line[i][j].mode & attr) {
1618 tsetdirt(i, i);
1619 break;
1620 }
1621 }
1622 }
1623 }
1624
1625 void
1626 tfulldirt(void)
1627 {
1628 tsetdirt(0, term.row-1);
1629 }
1630
1631 void
1632 tcursor(int mode)
1633 {
1634 static TCursor c[2];
1635 int alt = IS_SET(MODE_ALTSCREEN);
1636
1637 if (mode == CURSOR_SAVE) {
1638 c[alt] = term.c;
1639 } else if (mode == CURSOR_LOAD) {
1640 term.c = c[alt];
1641 tmoveto(c[alt].x, c[alt].y);
1642 }
1643 }
1644
1645 void
1646 treset(void)
1647 {
1648 uint i;
1649
1650 term.c = (TCursor){{
1651 .mode = ATTR_NULL,
1652 .fg = defaultfg,
1653 .bg = defaultbg
1654 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1655
1656 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1657 for (i = tabspaces; i < term.col; i += tabspaces)
1658 term.tabs[i] = 1;
1659 term.top = 0;
1660 term.bot = term.row - 1;
1661 term.mode = MODE_WRAP;
1662 memset(term.trantbl, CS_USA, sizeof(term.trantbl));
1663 term.charset = 0;
1664
1665 for (i = 0; i < 2; i++) {
1666 tmoveto(0, 0);
1667 tcursor(CURSOR_SAVE);
1668 tclearregion(0, 0, term.col-1, term.row-1);
1669 tswapscreen();
1670 }
1671 }
1672
1673 void
1674 tnew(int col, int row)
1675 {
1676 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1677 tresize(col, row);
1678 term.numlock = 1;
1679
1680 treset();
1681 }
1682
1683 void
1684 tswapscreen(void)
1685 {
1686 Line *tmp = term.line;
1687
1688 term.line = term.alt;
1689 term.alt = tmp;
1690 term.mode ^= MODE_ALTSCREEN;
1691 tfulldirt();
1692 }
1693
1694 void
1695 tscrolldown(int orig, int n)
1696 {
1697 int i;
1698 Line temp;
1699
1700 LIMIT(n, 0, term.bot-orig+1);
1701
1702 tsetdirt(orig, term.bot-n);
1703 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1704
1705 for (i = term.bot; i >= orig+n; i--) {
1706 temp = term.line[i];
1707 term.line[i] = term.line[i-n];
1708 term.line[i-n] = temp;
1709 }
1710
1711 selscroll(orig, n);
1712 }
1713
1714 void
1715 tscrollup(int orig, int n)
1716 {
1717 int i;
1718 Line temp;
1719
1720 LIMIT(n, 0, term.bot-orig+1);
1721
1722 tclearregion(0, orig, term.col-1, orig+n-1);
1723 tsetdirt(orig+n, term.bot);
1724
1725 for (i = orig; i <= term.bot-n; i++) {
1726 temp = term.line[i];
1727 term.line[i] = term.line[i+n];
1728 term.line[i+n] = temp;
1729 }
1730
1731 selscroll(orig, -n);
1732 }
1733
1734 void
1735 selscroll(int orig, int n)
1736 {
1737 if (sel.ob.x == -1)
1738 return;
1739
1740 if (BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1741 if ((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1742 selclear(NULL);
1743 return;
1744 }
1745 if (sel.type == SEL_RECTANGULAR) {
1746 if (sel.ob.y < term.top)
1747 sel.ob.y = term.top;
1748 if (sel.oe.y > term.bot)
1749 sel.oe.y = term.bot;
1750 } else {
1751 if (sel.ob.y < term.top) {
1752 sel.ob.y = term.top;
1753 sel.ob.x = 0;
1754 }
1755 if (sel.oe.y > term.bot) {
1756 sel.oe.y = term.bot;
1757 sel.oe.x = term.col;
1758 }
1759 }
1760 selnormalize();
1761 }
1762 }
1763
1764 void
1765 tnewline(int first_col)
1766 {
1767 int y = term.c.y;
1768
1769 if (y == term.bot) {
1770 tscrollup(term.top, 1);
1771 } else {
1772 y++;
1773 }
1774 tmoveto(first_col ? 0 : term.c.x, y);
1775 }
1776
1777 void
1778 csiparse(void)
1779 {
1780 char *p = csiescseq.buf, *np;
1781 long int v;
1782
1783 csiescseq.narg = 0;
1784 if (*p == '?') {
1785 csiescseq.priv = 1;
1786 p++;
1787 }
1788
1789 csiescseq.buf[csiescseq.len] = '\0';
1790 while (p < csiescseq.buf+csiescseq.len) {
1791 np = NULL;
1792 v = strtol(p, &np, 10);
1793 if (np == p)
1794 v = 0;
1795 if (v == LONG_MAX || v == LONG_MIN)
1796 v = -1;
1797 csiescseq.arg[csiescseq.narg++] = v;
1798 p = np;
1799 if (*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1800 break;
1801 p++;
1802 }
1803 csiescseq.mode[0] = *p++;
1804 csiescseq.mode[1] = (p < csiescseq.buf+csiescseq.len) ? *p : '\0';
1805 }
1806
1807 /* for absolute user moves, when decom is set */
1808 void
1809 tmoveato(int x, int y)
1810 {
1811 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1812 }
1813
1814 void
1815 tmoveto(int x, int y)
1816 {
1817 int miny, maxy;
1818
1819 if (term.c.state & CURSOR_ORIGIN) {
1820 miny = term.top;
1821 maxy = term.bot;
1822 } else {
1823 miny = 0;
1824 maxy = term.row - 1;
1825 }
1826 term.c.state &= ~CURSOR_WRAPNEXT;
1827 term.c.x = LIMIT(x, 0, term.col-1);
1828 term.c.y = LIMIT(y, miny, maxy);
1829 }
1830
1831 void
1832 tsetchar(Rune u, Glyph *attr, int x, int y)
1833 {
1834 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1835 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1836 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1837 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1838 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1839 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1840 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1841 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1842 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1843 };
1844
1845 /*
1846 * The table is proudly stolen from rxvt.
1847 */
1848 if (term.trantbl[term.charset] == CS_GRAPHIC0 &&
1849 BETWEEN(u, 0x41, 0x7e) && vt100_0[u - 0x41])
1850 utf8decode(vt100_0[u - 0x41], &u, UTF_SIZ);
1851
1852 if (term.line[y][x].mode & ATTR_WIDE) {
1853 if (x+1 < term.col) {
1854 term.line[y][x+1].u = ' ';
1855 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1856 }
1857 } else if (term.line[y][x].mode & ATTR_WDUMMY) {
1858 term.line[y][x-1].u = ' ';
1859 term.line[y][x-1].mode &= ~ATTR_WIDE;
1860 }
1861
1862 term.dirty[y] = 1;
1863 term.line[y][x] = *attr;
1864 term.line[y][x].u = u;
1865 }
1866
1867 void
1868 tclearregion(int x1, int y1, int x2, int y2)
1869 {
1870 int x, y, temp;
1871 Glyph *gp;
1872
1873 if (x1 > x2)
1874 temp = x1, x1 = x2, x2 = temp;
1875 if (y1 > y2)
1876 temp = y1, y1 = y2, y2 = temp;
1877
1878 LIMIT(x1, 0, term.col-1);
1879 LIMIT(x2, 0, term.col-1);
1880 LIMIT(y1, 0, term.row-1);
1881 LIMIT(y2, 0, term.row-1);
1882
1883 for (y = y1; y <= y2; y++) {
1884 term.dirty[y] = 1;
1885 for (x = x1; x <= x2; x++) {
1886 gp = &term.line[y][x];
1887 if (selected(x, y))
1888 selclear(NULL);
1889 gp->fg = term.c.attr.fg;
1890 gp->bg = term.c.attr.bg;
1891 gp->mode = 0;
1892 gp->u = ' ';
1893 }
1894 }
1895 }
1896
1897 void
1898 tdeletechar(int n)
1899 {
1900 int dst, src, size;
1901 Glyph *line;
1902
1903 LIMIT(n, 0, term.col - term.c.x);
1904
1905 dst = term.c.x;
1906 src = term.c.x + n;
1907 size = term.col - src;
1908 line = term.line[term.c.y];
1909
1910 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1911 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1912 }
1913
1914 void
1915 tinsertblank(int n)
1916 {
1917 int dst, src, size;
1918 Glyph *line;
1919
1920 LIMIT(n, 0, term.col - term.c.x);
1921
1922 dst = term.c.x + n;
1923 src = term.c.x;
1924 size = term.col - dst;
1925 line = term.line[term.c.y];
1926
1927 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1928 tclearregion(src, term.c.y, dst - 1, term.c.y);
1929 }
1930
1931 void
1932 tinsertblankline(int n)
1933 {
1934 if (BETWEEN(term.c.y, term.top, term.bot))
1935 tscrolldown(term.c.y, n);
1936 }
1937
1938 void
1939 tdeleteline(int n)
1940 {
1941 if (BETWEEN(term.c.y, term.top, term.bot))
1942 tscrollup(term.c.y, n);
1943 }
1944
1945 int32_t
1946 tdefcolor(int *attr, int *npar, int l)
1947 {
1948 int32_t idx = -1;
1949 uint r, g, b;
1950
1951 switch (attr[*npar + 1]) {
1952 case 2: /* direct color in RGB space */
1953 if (*npar + 4 >= l) {
1954 fprintf(stderr,
1955 "erresc(38): Incorrect number of parameters (%d)\n",
1956 *npar);
1957 break;
1958 }
1959 r = attr[*npar + 2];
1960 g = attr[*npar + 3];
1961 b = attr[*npar + 4];
1962 *npar += 4;
1963 if (!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1964 fprintf(stderr, "erresc: bad rgb color (%u,%u,%u)\n",
1965 r, g, b);
1966 else
1967 idx = TRUECOLOR(r, g, b);
1968 break;
1969 case 5: /* indexed color */
1970 if (*npar + 2 >= l) {
1971 fprintf(stderr,
1972 "erresc(38): Incorrect number of parameters (%d)\n",
1973 *npar);
1974 break;
1975 }
1976 *npar += 2;
1977 if (!BETWEEN(attr[*npar], 0, 255))
1978 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1979 else
1980 idx = attr[*npar];
1981 break;
1982 case 0: /* implemented defined (only foreground) */
1983 case 1: /* transparent */
1984 case 3: /* direct color in CMY space */
1985 case 4: /* direct color in CMYK space */
1986 default:
1987 fprintf(stderr,
1988 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1989 break;
1990 }
1991
1992 return idx;
1993 }
1994
1995 void
1996 tsetattr(int *attr, int l)
1997 {
1998 int i;
1999 int32_t idx;
2000
2001 for (i = 0; i < l; i++) {
2002 switch (attr[i]) {
2003 case 0:
2004 term.c.attr.mode &= ~(
2005 ATTR_BOLD |
2006 ATTR_FAINT |
2007 ATTR_ITALIC |
2008 ATTR_UNDERLINE |
2009 ATTR_BLINK |
2010 ATTR_REVERSE |
2011 ATTR_INVISIBLE |
2012 ATTR_STRUCK );
2013 term.c.attr.fg = defaultfg;
2014 term.c.attr.bg = defaultbg;
2015 break;
2016 case 1:
2017 term.c.attr.mode |= ATTR_BOLD;
2018 break;
2019 case 2:
2020 term.c.attr.mode |= ATTR_FAINT;
2021 break;
2022 case 3:
2023 term.c.attr.mode |= ATTR_ITALIC;
2024 break;
2025 case 4:
2026 term.c.attr.mode |= ATTR_UNDERLINE;
2027 break;
2028 case 5: /* slow blink */
2029 /* FALLTHROUGH */
2030 case 6: /* rapid blink */
2031 term.c.attr.mode |= ATTR_BLINK;
2032 break;
2033 case 7:
2034 term.c.attr.mode |= ATTR_REVERSE;
2035 break;
2036 case 8:
2037 term.c.attr.mode |= ATTR_INVISIBLE;
2038 break;
2039 case 9:
2040 term.c.attr.mode |= ATTR_STRUCK;
2041 break;
2042 case 22:
2043 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
2044 break;
2045 case 23:
2046 term.c.attr.mode &= ~ATTR_ITALIC;
2047 break;
2048 case 24:
2049 term.c.attr.mode &= ~ATTR_UNDERLINE;
2050 break;
2051 case 25:
2052 term.c.attr.mode &= ~ATTR_BLINK;
2053 break;
2054 case 27:
2055 term.c.attr.mode &= ~ATTR_REVERSE;
2056 break;
2057 case 28:
2058 term.c.attr.mode &= ~ATTR_INVISIBLE;
2059 break;
2060 case 29:
2061 term.c.attr.mode &= ~ATTR_STRUCK;
2062 break;
2063 case 38:
2064 if ((idx = tdefcolor(attr, &i, l)) >= 0)
2065 term.c.attr.fg = idx;
2066 break;
2067 case 39:
2068 term.c.attr.fg = defaultfg;
2069 break;
2070 case 48:
2071 if ((idx = tdefcolor(attr, &i, l)) >= 0)
2072 term.c.attr.bg = idx;
2073 break;
2074 case 49:
2075 term.c.attr.bg = defaultbg;
2076 break;
2077 default:
2078 if (BETWEEN(attr[i], 30, 37)) {
2079 term.c.attr.fg = attr[i] - 30;
2080 } else if (BETWEEN(attr[i], 40, 47)) {
2081 term.c.attr.bg = attr[i] - 40;
2082 } else if (BETWEEN(attr[i], 90, 97)) {
2083 term.c.attr.fg = attr[i] - 90 + 8;
2084 } else if (BETWEEN(attr[i], 100, 107)) {
2085 term.c.attr.bg = attr[i] - 100 + 8;
2086 } else {
2087 fprintf(stderr,
2088 "erresc(default): gfx attr %d unknown\n",
2089 attr[i]), csidump();
2090 }
2091 break;
2092 }
2093 }
2094 }
2095
2096 void
2097 tsetscroll(int t, int b)
2098 {
2099 int temp;
2100
2101 LIMIT(t, 0, term.row-1);
2102 LIMIT(b, 0, term.row-1);
2103 if (t > b) {
2104 temp = t;
2105 t = b;
2106 b = temp;
2107 }
2108 term.top = t;
2109 term.bot = b;
2110 }
2111
2112 void
2113 tsetmode(int priv, int set, int *args, int narg)
2114 {
2115 int *lim, mode;
2116 int alt;
2117
2118 for (lim = args + narg; args < lim; ++args) {
2119 if (priv) {
2120 switch (*args) {
2121 case 1: /* DECCKM -- Cursor key */
2122 MODBIT(term.mode, set, MODE_APPCURSOR);
2123 break;
2124 case 5: /* DECSCNM -- Reverse video */
2125 mode = term.mode;
2126 MODBIT(term.mode, set, MODE_REVERSE);
2127 if (mode != term.mode)
2128 redraw();
2129 break;
2130 case 6: /* DECOM -- Origin */
2131 MODBIT(term.c.state, set, CURSOR_ORIGIN);
2132 tmoveato(0, 0);
2133 break;
2134 case 7: /* DECAWM -- Auto wrap */
2135 MODBIT(term.mode, set, MODE_WRAP);
2136 break;
2137 case 0: /* Error (IGNORED) */
2138 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
2139 case 3: /* DECCOLM -- Column (IGNORED) */
2140 case 4: /* DECSCLM -- Scroll (IGNORED) */
2141 case 8: /* DECARM -- Auto repeat (IGNORED) */
2142 case 18: /* DECPFF -- Printer feed (IGNORED) */
2143 case 19: /* DECPEX -- Printer extent (IGNORED) */
2144 case 42: /* DECNRCM -- National characters (IGNORED) */
2145 case 12: /* att610 -- Start blinking cursor (IGNORED) */
2146 break;
2147 case 25: /* DECTCEM -- Text Cursor Enable Mode */
2148 MODBIT(term.mode, !set, MODE_HIDE);
2149 break;
2150 case 9: /* X10 mouse compatibility mode */
2151 xsetpointermotion(0);
2152 MODBIT(term.mode, 0, MODE_MOUSE);
2153 MODBIT(term.mode, set, MODE_MOUSEX10);
2154 break;
2155 case 1000: /* 1000: report button press */
2156 xsetpointermotion(0);
2157 MODBIT(term.mode, 0, MODE_MOUSE);
2158 MODBIT(term.mode, set, MODE_MOUSEBTN);
2159 break;
2160 case 1002: /* 1002: report motion on button press */
2161 xsetpointermotion(0);
2162 MODBIT(term.mode, 0, MODE_MOUSE);
2163 MODBIT(term.mode, set, MODE_MOUSEMOTION);
2164 break;
2165 case 1003: /* 1003: enable all mouse motions */
2166 xsetpointermotion(set);
2167 MODBIT(term.mode, 0, MODE_MOUSE);
2168 MODBIT(term.mode, set, MODE_MOUSEMANY);
2169 break;
2170 case 1004: /* 1004: send focus events to tty */
2171 MODBIT(term.mode, set, MODE_FOCUS);
2172 break;
2173 case 1006: /* 1006: extended reporting mode */
2174 MODBIT(term.mode, set, MODE_MOUSESGR);
2175 break;
2176 case 1034:
2177 MODBIT(term.mode, set, MODE_8BIT);
2178 break;
2179 case 1049: /* swap screen & set/restore cursor as xterm */
2180 if (!allowaltscreen)
2181 break;
2182 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
2183 /* FALLTHROUGH */
2184 case 47: /* swap screen */
2185 case 1047:
2186 if (!allowaltscreen)
2187 break;
2188 alt = IS_SET(MODE_ALTSCREEN);
2189 if (alt) {
2190 tclearregion(0, 0, term.col-1,
2191 term.row-1);
2192 }
2193 if (set ^ alt) /* set is always 1 or 0 */
2194 tswapscreen();
2195 if (*args != 1049)
2196 break;
2197 /* FALLTHROUGH */
2198 case 1048:
2199 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
2200 break;
2201 case 2004: /* 2004: bracketed paste mode */
2202 MODBIT(term.mode, set, MODE_BRCKTPASTE);
2203 break;
2204 /* Not implemented mouse modes. See comments there. */
2205 case 1001: /* mouse highlight mode; can hang the
2206 terminal by design when implemented. */
2207 case 1005: /* UTF-8 mouse mode; will confuse
2208 applications not supporting UTF-8
2209 and luit. */
2210 case 1015: /* urxvt mangled mouse mode; incompatible
2211 and can be mistaken for other control
2212 codes. */
2213 default:
2214 fprintf(stderr,
2215 "erresc: unknown private set/reset mode %d\n",
2216 *args);
2217 break;
2218 }
2219 } else {
2220 switch (*args) {
2221 case 0: /* Error (IGNORED) */
2222 break;
2223 case 2: /* KAM -- keyboard action */
2224 MODBIT(term.mode, set, MODE_KBDLOCK);
2225 break;
2226 case 4: /* IRM -- Insertion-replacement */
2227 MODBIT(term.mode, set, MODE_INSERT);
2228 break;
2229 case 12: /* SRM -- Send/Receive */
2230 MODBIT(term.mode, !set, MODE_ECHO);
2231 break;
2232 case 20: /* LNM -- Linefeed/new line */
2233 MODBIT(term.mode, set, MODE_CRLF);
2234 break;
2235 default:
2236 fprintf(stderr,
2237 "erresc: unknown set/reset mode %d\n",
2238 *args);
2239 break;
2240 }
2241 }
2242 }
2243 }
2244
2245 void
2246 csihandle(void)
2247 {
2248 char buf[40];
2249 int len;
2250
2251 switch (csiescseq.mode[0]) {
2252 default:
2253 unknown:
2254 fprintf(stderr, "erresc: unknown csi ");
2255 csidump();
2256 /* die(""); */
2257 break;
2258 case '@': /* ICH -- Insert <n> blank char */
2259 DEFAULT(csiescseq.arg[0], 1);
2260 tinsertblank(csiescseq.arg[0]);
2261 break;
2262 case 'A': /* CUU -- Cursor <n> Up */
2263 DEFAULT(csiescseq.arg[0], 1);
2264 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
2265 break;
2266 case 'B': /* CUD -- Cursor <n> Down */
2267 case 'e': /* VPR --Cursor <n> Down */
2268 DEFAULT(csiescseq.arg[0], 1);
2269 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
2270 break;
2271 case 'i': /* MC -- Media Copy */
2272 switch (csiescseq.arg[0]) {
2273 case 0:
2274 tdump();
2275 break;
2276 case 1:
2277 tdumpline(term.c.y);
2278 break;
2279 case 2:
2280 tdumpsel();
2281 break;
2282 case 4:
2283 term.mode &= ~MODE_PRINT;
2284 break;
2285 case 5:
2286 term.mode |= MODE_PRINT;
2287 break;
2288 }
2289 break;
2290 case 'c': /* DA -- Device Attributes */
2291 if (csiescseq.arg[0] == 0)
2292 ttywrite(vtiden, sizeof(vtiden) - 1);
2293 break;
2294 case 'C': /* CUF -- Cursor <n> Forward */
2295 case 'a': /* HPR -- Cursor <n> Forward */
2296 DEFAULT(csiescseq.arg[0], 1);
2297 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
2298 break;
2299 case 'D': /* CUB -- Cursor <n> Backward */
2300 DEFAULT(csiescseq.arg[0], 1);
2301 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
2302 break;
2303 case 'E': /* CNL -- Cursor <n> Down and first col */
2304 DEFAULT(csiescseq.arg[0], 1);
2305 tmoveto(0, term.c.y+csiescseq.arg[0]);
2306 break;
2307 case 'F': /* CPL -- Cursor <n> Up and first col */
2308 DEFAULT(csiescseq.arg[0], 1);
2309 tmoveto(0, term.c.y-csiescseq.arg[0]);
2310 break;
2311 case 'g': /* TBC -- Tabulation clear */
2312 switch (csiescseq.arg[0]) {
2313 case 0: /* clear current tab stop */
2314 term.tabs[term.c.x] = 0;
2315 break;
2316 case 3: /* clear all the tabs */
2317 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2318 break;
2319 default:
2320 goto unknown;
2321 }
2322 break;
2323 case 'G': /* CHA -- Move to <col> */
2324 case '`': /* HPA */
2325 DEFAULT(csiescseq.arg[0], 1);
2326 tmoveto(csiescseq.arg[0]-1, term.c.y);
2327 break;
2328 case 'H': /* CUP -- Move to <row> <col> */
2329 case 'f': /* HVP */
2330 DEFAULT(csiescseq.arg[0], 1);
2331 DEFAULT(csiescseq.arg[1], 1);
2332 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2333 break;
2334 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2335 DEFAULT(csiescseq.arg[0], 1);
2336 tputtab(csiescseq.arg[0]);
2337 break;
2338 case 'J': /* ED -- Clear screen */
2339 selclear(NULL);
2340 switch (csiescseq.arg[0]) {
2341 case 0: /* below */
2342 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2343 if (term.c.y < term.row-1) {
2344 tclearregion(0, term.c.y+1, term.col-1,
2345 term.row-1);
2346 }
2347 break;
2348 case 1: /* above */
2349 if (term.c.y > 1)
2350 tclearregion(0, 0, term.col-1, term.c.y-1);
2351 tclearregion(0, term.c.y, term.c.x, term.c.y);
2352 break;
2353 case 2: /* all */
2354 tclearregion(0, 0, term.col-1, term.row-1);
2355 break;
2356 default:
2357 goto unknown;
2358 }
2359 break;
2360 case 'K': /* EL -- Clear line */
2361 switch (csiescseq.arg[0]) {
2362 case 0: /* right */
2363 tclearregion(term.c.x, term.c.y, term.col-1,
2364 term.c.y);
2365 break;
2366 case 1: /* left */
2367 tclearregion(0, term.c.y, term.c.x, term.c.y);
2368 break;
2369 case 2: /* all */
2370 tclearregion(0, term.c.y, term.col-1, term.c.y);
2371 break;
2372 }
2373 break;
2374 case 'S': /* SU -- Scroll <n> line up */
2375 DEFAULT(csiescseq.arg[0], 1);
2376 tscrollup(term.top, csiescseq.arg[0]);
2377 break;
2378 case 'T': /* SD -- Scroll <n> line down */
2379 DEFAULT(csiescseq.arg[0], 1);
2380 tscrolldown(term.top, csiescseq.arg[0]);
2381 break;
2382 case 'L': /* IL -- Insert <n> blank lines */
2383 DEFAULT(csiescseq.arg[0], 1);
2384 tinsertblankline(csiescseq.arg[0]);
2385 break;
2386 case 'l': /* RM -- Reset Mode */
2387 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2388 break;
2389 case 'M': /* DL -- Delete <n> lines */
2390 DEFAULT(csiescseq.arg[0], 1);
2391 tdeleteline(csiescseq.arg[0]);
2392 break;
2393 case 'X': /* ECH -- Erase <n> char */
2394 DEFAULT(csiescseq.arg[0], 1);
2395 tclearregion(term.c.x, term.c.y,
2396 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2397 break;
2398 case 'P': /* DCH -- Delete <n> char */
2399 DEFAULT(csiescseq.arg[0], 1);
2400 tdeletechar(csiescseq.arg[0]);
2401 break;
2402 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2403 DEFAULT(csiescseq.arg[0], 1);
2404 tputtab(-csiescseq.arg[0]);
2405 break;
2406 case 'd': /* VPA -- Move to <row> */
2407 DEFAULT(csiescseq.arg[0], 1);
2408 tmoveato(term.c.x, csiescseq.arg[0]-1);
2409 break;
2410 case 'h': /* SM -- Set terminal mode */
2411 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2412 break;
2413 case 'm': /* SGR -- Terminal attribute (color) */
2414 tsetattr(csiescseq.arg, csiescseq.narg);
2415 break;
2416 case 'n': /* DSR – Device Status Report (cursor position) */
2417 if (csiescseq.arg[0] == 6) {
2418 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2419 term.c.y+1, term.c.x+1);
2420 ttywrite(buf, len);
2421 }
2422 break;
2423 case 'r': /* DECSTBM -- Set Scrolling Region */
2424 if (csiescseq.priv) {
2425 goto unknown;
2426 } else {
2427 DEFAULT(csiescseq.arg[0], 1);
2428 DEFAULT(csiescseq.arg[1], term.row);
2429 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2430 tmoveato(0, 0);
2431 }
2432 break;
2433 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2434 tcursor(CURSOR_SAVE);
2435 break;
2436 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2437 tcursor(CURSOR_LOAD);
2438 break;
2439 case ' ':
2440 switch (csiescseq.mode[1]) {
2441 case 'q': /* DECSCUSR -- Set Cursor Style */
2442 DEFAULT(csiescseq.arg[0], 1);
2443 if (!BETWEEN(csiescseq.arg[0], 0, 6)) {
2444 goto unknown;
2445 }
2446 xw.cursor = csiescseq.arg[0];
2447 break;
2448 default:
2449 goto unknown;
2450 }
2451 break;
2452 }
2453 }
2454
2455 void
2456 csidump(void)
2457 {
2458 int i;
2459 uint c;
2460
2461 printf("ESC[");
2462 for (i = 0; i < csiescseq.len; i++) {
2463 c = csiescseq.buf[i] & 0xff;
2464 if (isprint(c)) {
2465 putchar(c);
2466 } else if (c == '\n') {
2467 printf("(\\n)");
2468 } else if (c == '\r') {
2469 printf("(\\r)");
2470 } else if (c == 0x1b) {
2471 printf("(\\e)");
2472 } else {
2473 printf("(%02x)", c);
2474 }
2475 }
2476 putchar('\n');
2477 }
2478
2479 void
2480 csireset(void)
2481 {
2482 memset(&csiescseq, 0, sizeof(csiescseq));
2483 }
2484
2485 void
2486 strhandle(void)
2487 {
2488 char *p = NULL;
2489 int j, narg, par;
2490
2491 term.esc &= ~(ESC_STR_END|ESC_STR);
2492 strparse();
2493 par = (narg = strescseq.narg) ? atoi(strescseq.args[0]) : 0;
2494
2495 switch (strescseq.type) {
2496 case ']': /* OSC -- Operating System Command */
2497 switch (par) {
2498 case 0:
2499 case 1:
2500 case 2:
2501 if (narg > 1)
2502 xsettitle(strescseq.args[1]);
2503 return;
2504 case 4: /* color set */
2505 if (narg < 3)
2506 break;
2507 p = strescseq.args[2];
2508 /* FALLTHROUGH */
2509 case 104: /* color reset, here p = NULL */
2510 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2511 if (xsetcolorname(j, p)) {
2512 fprintf(stderr, "erresc: invalid color %s\n", p);
2513 } else {
2514 /*
2515 * TODO if defaultbg color is changed, borders
2516 * are dirty
2517 */
2518 redraw();
2519 }
2520 return;
2521 }
2522 break;
2523 case 'k': /* old title set compatibility */
2524 xsettitle(strescseq.args[0]);
2525 return;
2526 case 'P': /* DCS -- Device Control String */
2527 case '_': /* APC -- Application Program Command */
2528 case '^': /* PM -- Privacy Message */
2529 return;
2530 }
2531
2532 fprintf(stderr, "erresc: unknown str ");
2533 strdump();
2534 }
2535
2536 void
2537 strparse(void)
2538 {
2539 int c;
2540 char *p = strescseq.buf;
2541
2542 strescseq.narg = 0;
2543 strescseq.buf[strescseq.len] = '\0';
2544
2545 if (*p == '\0')
2546 return;
2547
2548 while (strescseq.narg < STR_ARG_SIZ) {
2549 strescseq.args[strescseq.narg++] = p;
2550 while ((c = *p) != ';' && c != '\0')
2551 ++p;
2552 if (c == '\0')
2553 return;
2554 *p++ = '\0';
2555 }
2556 }
2557
2558 void
2559 strdump(void)
2560 {
2561 int i;
2562 uint c;
2563
2564 printf("ESC%c", strescseq.type);
2565 for (i = 0; i < strescseq.len; i++) {
2566 c = strescseq.buf[i] & 0xff;
2567 if (c == '\0') {
2568 return;
2569 } else if (isprint(c)) {
2570 putchar(c);
2571 } else if (c == '\n') {
2572 printf("(\\n)");
2573 } else if (c == '\r') {
2574 printf("(\\r)");
2575 } else if (c == 0x1b) {
2576 printf("(\\e)");
2577 } else {
2578 printf("(%02x)", c);
2579 }
2580 }
2581 printf("ESC\\\n");
2582 }
2583
2584 void
2585 strreset(void)
2586 {
2587 memset(&strescseq, 0, sizeof(strescseq));
2588 }
2589
2590 void
2591 sendbreak(const Arg *arg)
2592 {
2593 if (tcsendbreak(cmdfd, 0))
2594 perror("Error sending break");
2595 }
2596
2597 void
2598 tprinter(char *s, size_t len)
2599 {
2600 if (iofd != -1 && xwrite(iofd, s, len) < 0) {
2601 fprintf(stderr, "Error writing in %s:%s\n",
2602 opt_io, strerror(errno));
2603 close(iofd);
2604 iofd = -1;
2605 }
2606 }
2607
2608 void
2609 toggleprinter(const Arg *arg)
2610 {
2611 term.mode ^= MODE_PRINT;
2612 }
2613
2614 void
2615 printscreen(const Arg *arg)
2616 {
2617 tdump();
2618 }
2619
2620 void
2621 printsel(const Arg *arg)
2622 {
2623 tdumpsel();
2624 }
2625
2626 void
2627 tdumpsel(void)
2628 {
2629 char *ptr;
2630
2631 if ((ptr = getsel())) {
2632 tprinter(ptr, strlen(ptr));
2633 free(ptr);
2634 }
2635 }
2636
2637 void
2638 tdumpline(int n)
2639 {
2640 char buf[UTF_SIZ];
2641 Glyph *bp, *end;
2642
2643 bp = &term.line[n][0];
2644 end = &bp[MIN(tlinelen(n), term.col) - 1];
2645 if (bp != end || bp->u != ' ') {
2646 for ( ;bp <= end; ++bp)
2647 tprinter(buf, utf8encode(bp->u, buf));
2648 }
2649 tprinter("\n", 1);
2650 }
2651
2652 void
2653 tdump(void)
2654 {
2655 int i;
2656
2657 for (i = 0; i < term.row; ++i)
2658 tdumpline(i);
2659 }
2660
2661 void
2662 tputtab(int n)
2663 {
2664 uint x = term.c.x;
2665
2666 if (n > 0) {
2667 while (x < term.col && n--)
2668 for (++x; x < term.col && !term.tabs[x]; ++x)
2669 /* nothing */ ;
2670 } else if (n < 0) {
2671 while (x > 0 && n++)
2672 for (--x; x > 0 && !term.tabs[x]; --x)
2673 /* nothing */ ;
2674 }
2675 term.c.x = LIMIT(x, 0, term.col-1);
2676 }
2677
2678 void
2679 techo(Rune u)
2680 {
2681 if (ISCONTROL(u)) { /* control code */
2682 if (u & 0x80) {
2683 u &= 0x7f;
2684 tputc('^');
2685 tputc('[');
2686 } else if (u != '\n' && u != '\r' && u != '\t') {
2687 u ^= 0x40;
2688 tputc('^');
2689 }
2690 }
2691 tputc(u);
2692 }
2693
2694 void
2695 tdeftran(char ascii)
2696 {
2697 static char cs[] = "0B";
2698 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2699 char *p;
2700
2701 if ((p = strchr(cs, ascii)) == NULL) {
2702 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2703 } else {
2704 term.trantbl[term.icharset] = vcs[p - cs];
2705 }
2706 }
2707
2708 void
2709 tdectest(char c)
2710 {
2711 int x, y;
2712
2713 if (c == '8') { /* DEC screen alignment test. */
2714 for (x = 0; x < term.col; ++x) {
2715 for (y = 0; y < term.row; ++y)
2716 tsetchar('E', &term.c.attr, x, y);
2717 }
2718 }
2719 }
2720
2721 void
2722 tstrsequence(uchar c)
2723 {
2724 switch (c) {
2725 case 0x90: /* DCS -- Device Control String */
2726 c = 'P';
2727 break;
2728 case 0x9f: /* APC -- Application Program Command */
2729 c = '_';
2730 break;
2731 case 0x9e: /* PM -- Privacy Message */
2732 c = '^';
2733 break;
2734 case 0x9d: /* OSC -- Operating System Command */
2735 c = ']';
2736 break;
2737 }
2738 strreset();
2739 strescseq.type = c;
2740 term.esc |= ESC_STR;
2741 }
2742
2743 void
2744 tcontrolcode(uchar ascii)
2745 {
2746 switch (ascii) {
2747 case '\t': /* HT */
2748 tputtab(1);
2749 return;
2750 case '\b': /* BS */
2751 tmoveto(term.c.x-1, term.c.y);
2752 return;
2753 case '\r': /* CR */
2754 tmoveto(0, term.c.y);
2755 return;
2756 case '\f': /* LF */
2757 case '\v': /* VT */
2758 case '\n': /* LF */
2759 /* go to first col if the mode is set */
2760 tnewline(IS_SET(MODE_CRLF));
2761 return;
2762 case '\a': /* BEL */
2763 if (term.esc & ESC_STR_END) {
2764 /* backwards compatibility to xterm */
2765 strhandle();
2766 } else {
2767 if (!(xw.state & WIN_FOCUSED))
2768 xseturgency(1);
2769 if (bellvolume)
2770 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
2771 }
2772 break;
2773 case '\033': /* ESC */
2774 csireset();
2775 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2776 term.esc |= ESC_START;
2777 return;
2778 case '\016': /* SO (LS1 -- Locking shift 1) */
2779 case '\017': /* SI (LS0 -- Locking shift 0) */
2780 term.charset = 1 - (ascii - '\016');
2781 return;
2782 case '\032': /* SUB */
2783 tsetchar('?', &term.c.attr, term.c.x, term.c.y);
2784 case '\030': /* CAN */
2785 csireset();
2786 break;
2787 case '\005': /* ENQ (IGNORED) */
2788 case '\000': /* NUL (IGNORED) */
2789 case '\021': /* XON (IGNORED) */
2790 case '\023': /* XOFF (IGNORED) */
2791 case 0177: /* DEL (IGNORED) */
2792 return;
2793 case 0x80: /* TODO: PAD */
2794 case 0x81: /* TODO: HOP */
2795 case 0x82: /* TODO: BPH */
2796 case 0x83: /* TODO: NBH */
2797 case 0x84: /* TODO: IND */
2798 break;
2799 case 0x85: /* NEL -- Next line */
2800 tnewline(1); /* always go to first col */
2801 break;
2802 case 0x86: /* TODO: SSA */
2803 case 0x87: /* TODO: ESA */
2804 break;
2805 case 0x88: /* HTS -- Horizontal tab stop */
2806 term.tabs[term.c.x] = 1;
2807 break;
2808 case 0x89: /* TODO: HTJ */
2809 case 0x8a: /* TODO: VTS */
2810 case 0x8b: /* TODO: PLD */
2811 case 0x8c: /* TODO: PLU */
2812 case 0x8d: /* TODO: RI */
2813 case 0x8e: /* TODO: SS2 */
2814 case 0x8f: /* TODO: SS3 */
2815 case 0x91: /* TODO: PU1 */
2816 case 0x92: /* TODO: PU2 */
2817 case 0x93: /* TODO: STS */
2818 case 0x94: /* TODO: CCH */
2819 case 0x95: /* TODO: MW */
2820 case 0x96: /* TODO: SPA */
2821 case 0x97: /* TODO: EPA */
2822 case 0x98: /* TODO: SOS */
2823 case 0x99: /* TODO: SGCI */
2824 break;
2825 case 0x9a: /* DECID -- Identify Terminal */
2826 ttywrite(vtiden, sizeof(vtiden) - 1);
2827 break;
2828 case 0x9b: /* TODO: CSI */
2829 case 0x9c: /* TODO: ST */
2830 break;
2831 case 0x90: /* DCS -- Device Control String */
2832 case 0x9d: /* OSC -- Operating System Command */
2833 case 0x9e: /* PM -- Privacy Message */
2834 case 0x9f: /* APC -- Application Program Command */
2835 tstrsequence(ascii);
2836 return;
2837 }
2838 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2839 term.esc &= ~(ESC_STR_END|ESC_STR);
2840 }
2841
2842 /*
2843 * returns 1 when the sequence is finished and it hasn't to read
2844 * more characters for this sequence, otherwise 0
2845 */
2846 int
2847 eschandle(uchar ascii)
2848 {
2849 switch (ascii) {
2850 case '[':
2851 term.esc |= ESC_CSI;
2852 return 0;
2853 case '#':
2854 term.esc |= ESC_TEST;
2855 return 0;
2856 case 'P': /* DCS -- Device Control String */
2857 case '_': /* APC -- Application Program Command */
2858 case '^': /* PM -- Privacy Message */
2859 case ']': /* OSC -- Operating System Command */
2860 case 'k': /* old title set compatibility */
2861 tstrsequence(ascii);
2862 return 0;
2863 case 'n': /* LS2 -- Locking shift 2 */
2864 case 'o': /* LS3 -- Locking shift 3 */
2865 term.charset = 2 + (ascii - 'n');
2866 break;
2867 case '(': /* GZD4 -- set primary charset G0 */
2868 case ')': /* G1D4 -- set secondary charset G1 */
2869 case '*': /* G2D4 -- set tertiary charset G2 */
2870 case '+': /* G3D4 -- set quaternary charset G3 */
2871 term.icharset = ascii - '(';
2872 term.esc |= ESC_ALTCHARSET;
2873 return 0;
2874 case 'D': /* IND -- Linefeed */
2875 if (term.c.y == term.bot) {
2876 tscrollup(term.top, 1);
2877 } else {
2878 tmoveto(term.c.x, term.c.y+1);
2879 }
2880 break;
2881 case 'E': /* NEL -- Next line */
2882 tnewline(1); /* always go to first col */
2883 break;
2884 case 'H': /* HTS -- Horizontal tab stop */
2885 term.tabs[term.c.x] = 1;
2886 break;
2887 case 'M': /* RI -- Reverse index */
2888 if (term.c.y == term.top) {
2889 tscrolldown(term.top, 1);
2890 } else {
2891 tmoveto(term.c.x, term.c.y-1);
2892 }
2893 break;
2894 case 'Z': /* DECID -- Identify Terminal */
2895 ttywrite(vtiden, sizeof(vtiden) - 1);
2896 break;
2897 case 'c': /* RIS -- Reset to inital state */
2898 treset();
2899 xresettitle();
2900 xloadcols();
2901 break;
2902 case '=': /* DECPAM -- Application keypad */
2903 term.mode |= MODE_APPKEYPAD;
2904 break;
2905 case '>': /* DECPNM -- Normal keypad */
2906 term.mode &= ~MODE_APPKEYPAD;
2907 break;
2908 case '7': /* DECSC -- Save Cursor */
2909 tcursor(CURSOR_SAVE);
2910 break;
2911 case '8': /* DECRC -- Restore Cursor */
2912 tcursor(CURSOR_LOAD);
2913 break;
2914 case '\\': /* ST -- String Terminator */
2915 if (term.esc & ESC_STR_END)
2916 strhandle();
2917 break;
2918 default:
2919 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2920 (uchar) ascii, isprint(ascii)? ascii:'.');
2921 break;
2922 }
2923 return 1;
2924 }
2925
2926 void
2927 tputc(Rune u)
2928 {
2929 char c[UTF_SIZ];
2930 int control;
2931 int width, len;
2932 Glyph *gp;
2933
2934 control = ISCONTROL(u);
2935 len = utf8encode(u, c);
2936 if (!control && (width = wcwidth(u)) == -1) {
2937 memcpy(c, "\357\277\275", 4); /* UTF_INVALID */
2938 width = 1;
2939 }
2940
2941 if (IS_SET(MODE_PRINT))
2942 tprinter(c, len);
2943
2944 /*
2945 * STR sequence must be checked before anything else
2946 * because it uses all following characters until it
2947 * receives a ESC, a SUB, a ST or any other C1 control
2948 * character.
2949 */
2950 if (term.esc & ESC_STR) {
2951 if (u == '\a' || u == 030 || u == 032 || u == 033 ||
2952 ISCONTROLC1(u)) {
2953 term.esc &= ~(ESC_START|ESC_STR);
2954 term.esc |= ESC_STR_END;
2955 } else if (strescseq.len + len < sizeof(strescseq.buf) - 1) {
2956 memmove(&strescseq.buf[strescseq.len], c, len);
2957 strescseq.len += len;
2958 return;
2959 } else {
2960 /*
2961 * Here is a bug in terminals. If the user never sends
2962 * some code to stop the str or esc command, then st
2963 * will stop responding. But this is better than
2964 * silently failing with unknown characters. At least
2965 * then users will report back.
2966 *
2967 * In the case users ever get fixed, here is the code:
2968 */
2969 /*
2970 * term.esc = 0;
2971 * strhandle();
2972 */
2973 return;
2974 }
2975 }
2976
2977 /*
2978 * Actions of control codes must be performed as soon they arrive
2979 * because they can be embedded inside a control sequence, and
2980 * they must not cause conflicts with sequences.
2981 */
2982 if (control) {
2983 tcontrolcode(u);
2984 /*
2985 * control codes are not shown ever
2986 */
2987 return;
2988 } else if (term.esc & ESC_START) {
2989 if (term.esc & ESC_CSI) {
2990 csiescseq.buf[csiescseq.len++] = u;
2991 if (BETWEEN(u, 0x40, 0x7E)
2992 || csiescseq.len >= \
2993 sizeof(csiescseq.buf)-1) {
2994 term.esc = 0;
2995 csiparse();
2996 csihandle();
2997 }
2998 return;
2999 } else if (term.esc & ESC_ALTCHARSET) {
3000 tdeftran(u);
3001 } else if (term.esc & ESC_TEST) {
3002 tdectest(u);
3003 } else {
3004 if (!eschandle(u))
3005 return;
3006 /* sequence already finished */
3007 }
3008 term.esc = 0;
3009 /*
3010 * All characters which form part of a sequence are not
3011 * printed
3012 */
3013 return;
3014 }
3015 if (sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
3016 selclear(NULL);
3017
3018 gp = &term.line[term.c.y][term.c.x];
3019 if (IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
3020 gp->mode |= ATTR_WRAP;
3021 tnewline(1);
3022 gp = &term.line[term.c.y][term.c.x];
3023 }
3024
3025 if (IS_SET(MODE_INSERT) && term.c.x+width < term.col)
3026 memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
3027
3028 if (term.c.x+width > term.col) {
3029 tnewline(1);
3030 gp = &term.line[term.c.y][term.c.x];
3031 }
3032
3033 tsetchar(u, &term.c.attr, term.c.x, term.c.y);
3034
3035 if (width == 2) {
3036 gp->mode |= ATTR_WIDE;
3037 if (term.c.x+1 < term.col) {
3038 gp[1].u = '\0';
3039 gp[1].mode = ATTR_WDUMMY;
3040 }
3041 }
3042 if (term.c.x+width < term.col) {
3043 tmoveto(term.c.x+width, term.c.y);
3044 } else {
3045 term.c.state |= CURSOR_WRAPNEXT;
3046 }
3047 }
3048
3049 void
3050 tresize(int col, int row)
3051 {
3052 int i;
3053 int minrow = MIN(row, term.row);
3054 int mincol = MIN(col, term.col);
3055 int *bp;
3056 TCursor c;
3057
3058 if (col < 1 || row < 1) {
3059 fprintf(stderr,
3060 "tresize: error resizing to %dx%d\n", col, row);
3061 return;
3062 }
3063
3064 /*
3065 * slide screen to keep cursor where we expect it -
3066 * tscrollup would work here, but we can optimize to
3067 * memmove because we're freeing the earlier lines
3068 */
3069 for (i = 0; i <= term.c.y - row; i++) {
3070 free(term.line[i]);
3071 free(term.alt[i]);
3072 }
3073 /* ensure that both src and dst are not NULL */
3074 if (i > 0) {
3075 memmove(term.line, term.line + i, row * sizeof(Line));
3076 memmove(term.alt, term.alt + i, row * sizeof(Line));
3077 }
3078 for (i += row; i < term.row; i++) {
3079 free(term.line[i]);
3080 free(term.alt[i]);
3081 }
3082
3083 /* resize to new width */
3084 term.specbuf = xrealloc(term.specbuf, col * sizeof(XftGlyphFontSpec));
3085
3086 /* resize to new height */
3087 term.line = xrealloc(term.line, row * sizeof(Line));
3088 term.alt = xrealloc(term.alt, row * sizeof(Line));
3089 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
3090 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
3091
3092 /* resize each row to new width, zero-pad if needed */
3093 for (i = 0; i < minrow; i++) {
3094 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
3095 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
3096 }
3097
3098 /* allocate any new rows */
3099 for (/* i == minrow */; i < row; i++) {
3100 term.line[i] = xmalloc(col * sizeof(Glyph));
3101 term.alt[i] = xmalloc(col * sizeof(Glyph));
3102 }
3103 if (col > term.col) {
3104 bp = term.tabs + term.col;
3105
3106 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
3107 while (--bp > term.tabs && !*bp)
3108 /* nothing */ ;
3109 for (bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
3110 *bp = 1;
3111 }
3112 /* update terminal size */
3113 term.col = col;
3114 term.row = row;
3115 /* reset scrolling region */
3116 tsetscroll(0, row-1);
3117 /* make use of the LIMIT in tmoveto */
3118 tmoveto(term.c.x, term.c.y);
3119 /* Clearing both screens (it makes dirty all lines) */
3120 c = term.c;
3121 for (i = 0; i < 2; i++) {
3122 if (mincol < col && 0 < minrow) {
3123 tclearregion(mincol, 0, col - 1, minrow - 1);
3124 }
3125 if (0 < col && minrow < row) {
3126 tclearregion(0, minrow, col - 1, row - 1);
3127 }
3128 tswapscreen();
3129 tcursor(CURSOR_LOAD);
3130 }
3131 term.c = c;
3132 }
3133
3134 void
3135 xresize(int col, int row)
3136 {
3137 xw.tw = MAX(1, col * xw.cw);
3138 xw.th = MAX(1, row * xw.ch);
3139
3140 XFreePixmap(xw.dpy, xw.buf);
3141 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3142 DefaultDepth(xw.dpy, xw.scr));
3143 XftDrawChange(xw.draw, xw.buf);
3144 xclear(0, 0, xw.w, xw.h);
3145 }
3146
3147 ushort
3148 sixd_to_16bit(int x)
3149 {
3150 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
3151 }
3152
3153 int
3154 xloadcolor(int i, const char *name, Color *ncolor)
3155 {
3156 XRenderColor color = { .alpha = 0xffff };
3157
3158 if (!name) {
3159 if (BETWEEN(i, 16, 255)) { /* 256 color */
3160 if (i < 6*6*6+16) { /* same colors as xterm */
3161 color.red = sixd_to_16bit( ((i-16)/36)%6 );
3162 color.green = sixd_to_16bit( ((i-16)/6) %6 );
3163 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
3164 } else { /* greyscale */
3165 color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
3166 color.green = color.blue = color.red;
3167 }
3168 return XftColorAllocValue(xw.dpy, xw.vis,
3169 xw.cmap, &color, ncolor);
3170 } else
3171 name = colorname[i];
3172 }
3173
3174 return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
3175 }
3176
3177 void
3178 xloadcols(void)
3179 {
3180 int i;
3181 static int loaded;
3182 Color *cp;
3183
3184 if (loaded) {
3185 for (cp = dc.col; cp < &dc.col[LEN(dc.col)]; ++cp)
3186 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
3187 }
3188
3189 for (i = 0; i < LEN(dc.col); i++)
3190 if (!xloadcolor(i, NULL, &dc.col[i])) {
3191 if (colorname[i])
3192 die("Could not allocate color '%s'\n", colorname[i]);
3193 else
3194 die("Could not allocate color %d\n", i);
3195 }
3196 loaded = 1;
3197 }
3198
3199 int
3200 xsetcolorname(int x, const char *name)
3201 {
3202 Color ncolor;
3203
3204 if (!BETWEEN(x, 0, LEN(dc.col)))
3205 return 1;
3206
3207
3208 if (!xloadcolor(x, name, &ncolor))
3209 return 1;
3210
3211 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
3212 dc.col[x] = ncolor;
3213
3214 return 0;
3215 }
3216
3217 void
3218 xtermclear(int col1, int row1, int col2, int row2)
3219 {
3220 XftDrawRect(xw.draw,
3221 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
3222 borderpx + col1 * xw.cw,
3223 borderpx + row1 * xw.ch,
3224 (col2-col1+1) * xw.cw,
3225 (row2-row1+1) * xw.ch);
3226 }
3227
3228 /*
3229 * Absolute coordinates.
3230 */
3231 void
3232 xclear(int x1, int y1, int x2, int y2)
3233 {
3234 XftDrawRect(xw.draw,
3235 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
3236 x1, y1, x2-x1, y2-y1);
3237 }
3238
3239 void
3240 xhints(void)
3241 {
3242 XClassHint class = {termname, opt_class ? opt_class : termname};
3243 XWMHints wm = {.flags = InputHint, .input = 1};
3244 XSizeHints *sizeh = NULL;
3245
3246 sizeh = XAllocSizeHints();
3247
3248 sizeh->flags = PSize | PResizeInc | PBaseSize;
3249 sizeh->height = xw.h;
3250 sizeh->width = xw.w;
3251 sizeh->height_inc = xw.ch;
3252 sizeh->width_inc = xw.cw;
3253 sizeh->base_height = 2 * borderpx;
3254 sizeh->base_width = 2 * borderpx;
3255 if (xw.isfixed) {
3256 sizeh->flags |= PMaxSize | PMinSize;
3257 sizeh->min_width = sizeh->max_width = xw.w;
3258 sizeh->min_height = sizeh->max_height = xw.h;
3259 }
3260 if (xw.gm & (XValue|YValue)) {
3261 sizeh->flags |= USPosition | PWinGravity;
3262 sizeh->x = xw.l;
3263 sizeh->y = xw.t;
3264 sizeh->win_gravity = xgeommasktogravity(xw.gm);
3265 }
3266
3267 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
3268 &class);
3269 XFree(sizeh);
3270 }
3271
3272 int
3273 xgeommasktogravity(int mask)
3274 {
3275 switch (mask & (XNegative|YNegative)) {
3276 case 0:
3277 return NorthWestGravity;
3278 case XNegative:
3279 return NorthEastGravity;
3280 case YNegative:
3281 return SouthWestGravity;
3282 }
3283
3284 return SouthEastGravity;
3285 }
3286
3287 int
3288 xloadfont(Font *f, FcPattern *pattern)
3289 {
3290 FcPattern *match;
3291 FcResult result;
3292
3293 match = FcFontMatch(NULL, pattern, &result);
3294 if (!match)
3295 return 1;
3296
3297 if (!(f->match = XftFontOpenPattern(xw.dpy, match))) {
3298 FcPatternDestroy(match);
3299 return 1;
3300 }
3301
3302 f->set = NULL;
3303 f->pattern = FcPatternDuplicate(pattern);
3304
3305 f->ascent = f->match->ascent;
3306 f->descent = f->match->descent;
3307 f->lbearing = 0;
3308 f->rbearing = f->match->max_advance_width;
3309
3310 f->height = f->ascent + f->descent;
3311 f->width = f->lbearing + f->rbearing;
3312
3313 return 0;
3314 }
3315
3316 void
3317 xloadfonts(char *fontstr, double fontsize)
3318 {
3319 FcPattern *pattern;
3320 double fontval;
3321 float ceilf(float);
3322
3323 if (fontstr[0] == '-') {
3324 pattern = XftXlfdParse(fontstr, False, False);
3325 } else {
3326 pattern = FcNameParse((FcChar8 *)fontstr);
3327 }
3328
3329 if (!pattern)
3330 die("st: can't open font %s\n", fontstr);
3331
3332 if (fontsize > 1) {
3333 FcPatternDel(pattern, FC_PIXEL_SIZE);
3334 FcPatternDel(pattern, FC_SIZE);
3335 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
3336 usedfontsize = fontsize;
3337 } else {
3338 if (FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval) ==
3339 FcResultMatch) {
3340 usedfontsize = fontval;
3341 } else if (FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval) ==
3342 FcResultMatch) {
3343 usedfontsize = -1;
3344 } else {
3345 /*
3346 * Default font size is 12, if none given. This is to
3347 * have a known usedfontsize value.
3348 */
3349 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
3350 usedfontsize = 12;
3351 }
3352 defaultfontsize = usedfontsize;
3353 }
3354
3355 FcConfigSubstitute(0, pattern, FcMatchPattern);
3356 FcDefaultSubstitute(pattern);
3357
3358 if (xloadfont(&dc.font, pattern))
3359 die("st: can't open font %s\n", fontstr);
3360
3361 if (usedfontsize < 0) {
3362 FcPatternGetDouble(dc.font.match->pattern,
3363 FC_PIXEL_SIZE, 0, &fontval);
3364 usedfontsize = fontval;
3365 if (fontsize == 0)
3366 defaultfontsize = fontval;
3367 }
3368
3369 /* Setting character width and height. */
3370 xw.cw = ceilf(dc.font.width * cwscale);
3371 xw.ch = ceilf(dc.font.height * chscale);
3372
3373 FcPatternDel(pattern, FC_SLANT);
3374 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3375 if (xloadfont(&dc.ifont, pattern))
3376 die("st: can't open font %s\n", fontstr);
3377
3378 FcPatternDel(pattern, FC_WEIGHT);
3379 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3380 if (xloadfont(&dc.ibfont, pattern))
3381 die("st: can't open font %s\n", fontstr);
3382
3383 FcPatternDel(pattern, FC_SLANT);
3384 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3385 if (xloadfont(&dc.bfont, pattern))
3386 die("st: can't open font %s\n", fontstr);
3387
3388 FcPatternDestroy(pattern);
3389 }
3390
3391 void
3392 xunloadfont(Font *f)
3393 {
3394 XftFontClose(xw.dpy, f->match);
3395 FcPatternDestroy(f->pattern);
3396 if (f->set)
3397 FcFontSetDestroy(f->set);
3398 }
3399
3400 void
3401 xunloadfonts(void)
3402 {
3403 /* Free the loaded fonts in the font cache. */
3404 while (frclen > 0)
3405 XftFontClose(xw.dpy, frc[--frclen].font);
3406
3407 xunloadfont(&dc.font);
3408 xunloadfont(&dc.bfont);
3409 xunloadfont(&dc.ifont);
3410 xunloadfont(&dc.ibfont);
3411 }
3412
3413 void
3414 xzoom(const Arg *arg)
3415 {
3416 Arg larg;
3417
3418 larg.f = usedfontsize + arg->f;
3419 xzoomabs(&larg);
3420 }
3421
3422 void
3423 xzoomabs(const Arg *arg)
3424 {
3425 xunloadfonts();
3426 xloadfonts(usedfont, arg->f);
3427 cresize(0, 0);
3428 redraw();
3429 xhints();
3430 }
3431
3432 void
3433 xzoomreset(const Arg *arg)
3434 {
3435 Arg larg;
3436
3437 if (defaultfontsize > 0) {
3438 larg.f = defaultfontsize;
3439 xzoomabs(&larg);
3440 }
3441 }
3442
3443 void
3444 xinit(void)
3445 {
3446 XGCValues gcvalues;
3447 Cursor cursor;
3448 Window parent;
3449 pid_t thispid = getpid();
3450 XColor xmousefg, xmousebg;
3451
3452 if (!(xw.dpy = XOpenDisplay(NULL)))
3453 die("Can't open display\n");
3454 xw.scr = XDefaultScreen(xw.dpy);
3455 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3456
3457 /* font */
3458 if (!FcInit())
3459 die("Could not init fontconfig.\n");
3460
3461 usedfont = (opt_font == NULL)? font : opt_font;
3462 xloadfonts(usedfont, 0);
3463
3464 /* colors */
3465 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3466 xloadcols();
3467
3468 /* adjust fixed window geometry */
3469 xw.w = 2 * borderpx + term.col * xw.cw;
3470 xw.h = 2 * borderpx + term.row * xw.ch;
3471 if (xw.gm & XNegative)
3472 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3473 if (xw.gm & YNegative)
3474 xw.t += DisplayHeight(xw.dpy, xw.scr) - xw.h - 2;
3475
3476 /* Events */
3477 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3478 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3479 xw.attrs.bit_gravity = NorthWestGravity;
3480 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3481 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3482 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3483 xw.attrs.colormap = xw.cmap;
3484
3485 if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
3486 parent = XRootWindow(xw.dpy, xw.scr);
3487 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3488 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3489 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3490 | CWEventMask | CWColormap, &xw.attrs);
3491
3492 memset(&gcvalues, 0, sizeof(gcvalues));
3493 gcvalues.graphics_exposures = False;
3494 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3495 &gcvalues);
3496 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3497 DefaultDepth(xw.dpy, xw.scr));
3498 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3499 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3500
3501 /* Xft rendering context */
3502 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3503
3504 /* input methods */
3505 if ((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3506 XSetLocaleModifiers("@im=local");
3507 if ((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3508 XSetLocaleModifiers("@im=");
3509 if ((xw.xim = XOpenIM(xw.dpy,
3510 NULL, NULL, NULL)) == NULL) {
3511 die("XOpenIM failed. Could not open input"
3512 " device.\n");
3513 }
3514 }
3515 }
3516 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3517 | XIMStatusNothing, XNClientWindow, xw.win,
3518 XNFocusWindow, xw.win, NULL);
3519 if (xw.xic == NULL)
3520 die("XCreateIC failed. Could not obtain input method.\n");
3521
3522 /* white cursor, black outline */
3523 cursor = XCreateFontCursor(xw.dpy, mouseshape);
3524 XDefineCursor(xw.dpy, xw.win, cursor);
3525
3526 if (XParseColor(xw.dpy, xw.cmap, colorname[mousefg], &xmousefg) == 0) {
3527 xmousefg.red = 0xffff;
3528 xmousefg.green = 0xffff;
3529 xmousefg.blue = 0xffff;
3530 }
3531
3532 if (XParseColor(xw.dpy, xw.cmap, colorname[mousebg], &xmousebg) == 0) {
3533 xmousebg.red = 0x0000;
3534 xmousebg.green = 0x0000;
3535 xmousebg.blue = 0x0000;
3536 }
3537
3538 XRecolorCursor(xw.dpy, cursor, &xmousefg, &xmousebg);
3539
3540 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3541 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3542 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3543 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3544
3545 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3546 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3547 PropModeReplace, (uchar *)&thispid, 1);
3548
3549 xresettitle();
3550 XMapWindow(xw.dpy, xw.win);
3551 xhints();
3552 XSync(xw.dpy, False);
3553 }
3554
3555 int
3556 xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x, int y)
3557 {
3558 float winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch, xp, yp;
3559 ushort mode, prevmode = USHRT_MAX;
3560 Font *font = &dc.font;
3561 int frcflags = FRC_NORMAL;
3562 float runewidth = xw.cw;
3563 Rune rune;
3564 FT_UInt glyphidx;
3565 FcResult fcres;
3566 FcPattern *fcpattern, *fontpattern;
3567 FcFontSet *fcsets[] = { NULL };
3568 FcCharSet *fccharset;
3569 int i, f, numspecs = 0;
3570
3571 for (i = 0, xp = winx, yp = winy + font->ascent; i < len; ++i) {
3572 /* Fetch rune and mode for current glyph. */
3573 rune = glyphs[i].u;
3574 mode = glyphs[i].mode;
3575
3576 /* Skip dummy wide-character spacing. */
3577 if (mode == ATTR_WDUMMY)
3578 continue;
3579
3580 /* Determine font for glyph if different from previous glyph. */
3581 if (prevmode != mode) {
3582 prevmode = mode;
3583 font = &dc.font;
3584 frcflags = FRC_NORMAL;
3585 runewidth = xw.cw * ((mode & ATTR_WIDE) ? 2.0f : 1.0f);
3586 if ((mode & ATTR_ITALIC) && (mode & ATTR_BOLD)) {
3587 font = &dc.ibfont;
3588 frcflags = FRC_ITALICBOLD;
3589 } else if (mode & ATTR_ITALIC) {
3590 font = &dc.ifont;
3591 frcflags = FRC_ITALIC;
3592 } else if (mode & ATTR_BOLD) {
3593 font = &dc.bfont;
3594 frcflags = FRC_BOLD;
3595 }
3596 yp = winy + font->ascent;
3597 }
3598
3599 /* Lookup character index with default font. */
3600 glyphidx = XftCharIndex(xw.dpy, font->match, rune);
3601 if (glyphidx) {
3602 specs[numspecs].font = font->match;
3603 specs[numspecs].glyph = glyphidx;
3604 specs[numspecs].x = (short)xp;
3605 specs[numspecs].y = (short)yp;
3606 xp += runewidth;
3607 numspecs++;
3608 continue;
3609 }
3610
3611 /* Fallback on font cache, search the font cache for match. */
3612 for (f = 0; f < frclen; f++) {
3613 glyphidx = XftCharIndex(xw.dpy, frc[f].font, rune);
3614 /* Everything correct. */
3615 if (glyphidx && frc[f].flags == frcflags)
3616 break;
3617 /* We got a default font for a not found glyph. */
3618 if (!glyphidx && frc[f].flags == frcflags
3619 && frc[f].unicodep == rune) {
3620 break;
3621 }
3622 }
3623
3624 /* Nothing was found. Use fontconfig to find matching font. */
3625 if (f >= frclen) {
3626 if (!font->set)
3627 font->set = FcFontSort(0, font->pattern,
3628 1, 0, &fcres);
3629 fcsets[0] = font->set;
3630
3631 /*
3632 * Nothing was found in the cache. Now use
3633 * some dozen of Fontconfig calls to get the
3634 * font for one single character.
3635 *
3636 * Xft and fontconfig are design failures.
3637 */
3638 fcpattern = FcPatternDuplicate(font->pattern);
3639 fccharset = FcCharSetCreate();
3640
3641 FcCharSetAddChar(fccharset, rune);
3642 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3643 fccharset);
3644 FcPatternAddBool(fcpattern, FC_SCALABLE, 1);
3645
3646 FcConfigSubstitute(0, fcpattern,
3647 FcMatchPattern);
3648 FcDefaultSubstitute(fcpattern);
3649
3650 fontpattern = FcFontSetMatch(0, fcsets, 1,
3651 fcpattern, &fcres);
3652
3653 /*
3654 * Overwrite or create the new cache entry.
3655 */
3656 if (frclen >= LEN(frc)) {
3657 frclen = LEN(frc) - 1;
3658 XftFontClose(xw.dpy, frc[frclen].font);
3659 frc[frclen].unicodep = 0;
3660 }
3661
3662 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3663 fontpattern);
3664 frc[frclen].flags = frcflags;
3665 frc[frclen].unicodep = rune;
3666
3667 glyphidx = XftCharIndex(xw.dpy, frc[frclen].font, rune);
3668
3669 f = frclen;
3670 frclen++;
3671
3672 FcPatternDestroy(fcpattern);
3673 FcCharSetDestroy(fccharset);
3674 }
3675
3676 specs[numspecs].font = frc[f].font;
3677 specs[numspecs].glyph = glyphidx;
3678 specs[numspecs].x = (short)xp;
3679 specs[numspecs].y = (short)(winy + frc[f].font->ascent);
3680 xp += runewidth;
3681 numspecs++;
3682 }
3683
3684 return numspecs;
3685 }
3686
3687 void
3688 xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, int y)
3689 {
3690 int charlen = len * ((base.mode & ATTR_WIDE) ? 2 : 1);
3691 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3692 width = charlen * xw.cw;
3693 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3694 XRenderColor colfg, colbg;
3695 XRectangle r;
3696
3697 /* Determine foreground and background colors based on mode. */
3698 if (base.fg == defaultfg) {
3699 if (base.mode & ATTR_ITALIC)
3700 base.fg = defaultitalic;
3701 else if ((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD))
3702 base.fg = defaultitalic;
3703 else if (base.mode & ATTR_UNDERLINE)
3704 base.fg = defaultunderline;
3705 }
3706
3707 if (IS_TRUECOL(base.fg)) {
3708 colfg.alpha = 0xffff;
3709 colfg.red = TRUERED(base.fg);
3710 colfg.green = TRUEGREEN(base.fg);
3711 colfg.blue = TRUEBLUE(base.fg);
3712 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3713 fg = &truefg;
3714 } else {
3715 fg = &dc.col[base.fg];
3716 }
3717
3718 if (IS_TRUECOL(base.bg)) {
3719 colbg.alpha = 0xffff;
3720 colbg.green = TRUEGREEN(base.bg);
3721 colbg.red = TRUERED(base.bg);
3722 colbg.blue = TRUEBLUE(base.bg);
3723 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3724 bg = &truebg;
3725 } else {
3726 bg = &dc.col[base.bg];
3727 }
3728
3729 /* Change basic system colors [0-7] to bright system colors [8-15] */
3730 if ((base.mode & ATTR_BOLD_FAINT) == ATTR_BOLD && BETWEEN(base.fg, 0, 7))
3731 fg = &dc.col[base.fg + 8];
3732
3733 if (IS_SET(MODE_REVERSE)) {
3734 if (fg == &dc.col[defaultfg]) {
3735 fg = &dc.col[defaultbg];
3736 } else {
3737 colfg.red = ~fg->color.red;
3738 colfg.green = ~fg->color.green;
3739 colfg.blue = ~fg->color.blue;
3740 colfg.alpha = fg->color.alpha;
3741 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3742 &revfg);
3743 fg = &revfg;
3744 }
3745
3746 if (bg == &dc.col[defaultbg]) {
3747 bg = &dc.col[defaultfg];
3748 } else {
3749 colbg.red = ~bg->color.red;
3750 colbg.green = ~bg->color.green;
3751 colbg.blue = ~bg->color.blue;
3752 colbg.alpha = bg->color.alpha;
3753 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3754 &revbg);
3755 bg = &revbg;
3756 }
3757 }
3758
3759 if (base.mode & ATTR_REVERSE) {
3760 temp = fg;
3761 fg = bg;
3762 bg = temp;
3763 }
3764
3765 if ((base.mode & ATTR_BOLD_FAINT) == ATTR_FAINT) {
3766 colfg.red = fg->color.red / 2;
3767 colfg.green = fg->color.green / 2;
3768 colfg.blue = fg->color.blue / 2;
3769 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3770 fg = &revfg;
3771 }
3772
3773 if (base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3774 fg = bg;
3775
3776 if (base.mode & ATTR_INVISIBLE)
3777 fg = bg;
3778
3779 /* Intelligent cleaning up of the borders. */
3780 if (x == 0) {
3781 xclear(0, (y == 0)? 0 : winy, borderpx,
3782 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3783 }
3784 if (x + charlen >= term.col) {
3785 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3786 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3787 }
3788 if (y == 0)
3789 xclear(winx, 0, winx + width, borderpx);
3790 if (y == term.row-1)
3791 xclear(winx, winy + xw.ch, winx + width, xw.h);
3792
3793 /* Clean up the region we want to draw to. */
3794 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3795
3796 /* Set the clip region because Xft is sometimes dirty. */
3797 r.x = 0;
3798 r.y = 0;
3799 r.height = xw.ch;
3800 r.width = width;
3801 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3802
3803 /* Render the glyphs. */
3804 XftDrawGlyphFontSpec(xw.draw, fg, specs, len);
3805
3806 /* Render underline and strikethrough. */
3807 if (base.mode & ATTR_UNDERLINE) {
3808 XftDrawRect(xw.draw, fg, winx, winy + dc.font.ascent + 1,
3809 width, 1);
3810 }
3811
3812 if (base.mode & ATTR_STRUCK) {
3813 XftDrawRect(xw.draw, fg, winx, winy + 2 * dc.font.ascent / 3,
3814 width, 1);
3815 }
3816
3817 /* Reset clip to none. */
3818 XftDrawSetClip(xw.draw, 0);
3819 }
3820
3821 void
3822 xdrawglyph(Glyph g, int x, int y)
3823 {
3824 int numspecs;
3825 XftGlyphFontSpec spec;
3826
3827 numspecs = xmakeglyphfontspecs(&spec, &g, 1, x, y);
3828 xdrawglyphfontspecs(&spec, g, numspecs, x, y);
3829 }
3830
3831 void
3832 xdrawcursor(void)
3833 {
3834 static int oldx = 0, oldy = 0;
3835 int curx;
3836 Glyph g = {' ', ATTR_NULL, defaultbg, defaultcs}, og;
3837 int ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3838 Color drawcol;
3839
3840 LIMIT(oldx, 0, term.col-1);
3841 LIMIT(oldy, 0, term.row-1);
3842
3843 curx = term.c.x;
3844
3845 /* adjust position if in dummy */
3846 if (term.line[oldy][oldx].mode & ATTR_WDUMMY)
3847 oldx--;
3848 if (term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3849 curx--;
3850
3851 /* remove the old cursor */
3852 og = term.line[oldy][oldx];
3853 if (ena_sel && selected(oldx, oldy))
3854 og.mode ^= ATTR_REVERSE;
3855 xdrawglyph(og, oldx, oldy);
3856
3857 g.u = term.line[term.c.y][term.c.x].u;
3858
3859 /*
3860 * Select the right color for the right mode.
3861 */
3862 if (IS_SET(MODE_REVERSE)) {
3863 g.mode |= ATTR_REVERSE;
3864 g.bg = defaultfg;
3865 if (ena_sel && selected(term.c.x, term.c.y)) {
3866 drawcol = dc.col[defaultcs];
3867 g.fg = defaultrcs;
3868 } else {
3869 drawcol = dc.col[defaultrcs];
3870 g.fg = defaultcs;
3871 }
3872 } else {
3873 if (ena_sel && selected(term.c.x, term.c.y)) {
3874 drawcol = dc.col[defaultrcs];
3875 g.fg = defaultfg;
3876 g.bg = defaultrcs;
3877 } else {
3878 drawcol = dc.col[defaultcs];
3879 }
3880 }
3881
3882 if (IS_SET(MODE_HIDE))
3883 return;
3884
3885 /* draw the new one */
3886 if (xw.state & WIN_FOCUSED) {
3887 switch (xw.cursor) {
3888 case 7: /* st extension: snowman */
3889 utf8decode("☃", &g.u, UTF_SIZ);
3890 case 0: /* Blinking Block */
3891 case 1: /* Blinking Block (Default) */
3892 case 2: /* Steady Block */
3893 g.mode |= term.line[term.c.y][curx].mode & ATTR_WIDE;
3894 xdrawglyph(g, term.c.x, term.c.y);
3895 break;
3896 case 3: /* Blinking Underline */
3897 case 4: /* Steady Underline */
3898 XftDrawRect(xw.draw, &drawcol,
3899 borderpx + curx * xw.cw,
3900 borderpx + (term.c.y + 1) * xw.ch - \
3901 cursorthickness,
3902 xw.cw, cursorthickness);
3903 break;
3904 case 5: /* Blinking bar */
3905 case 6: /* Steady bar */
3906 XftDrawRect(xw.draw, &drawcol,
3907 borderpx + curx * xw.cw,
3908 borderpx + term.c.y * xw.ch,
3909 cursorthickness, xw.ch);
3910 break;
3911 }
3912 } else {
3913 XftDrawRect(xw.draw, &drawcol,
3914 borderpx + curx * xw.cw,
3915 borderpx + term.c.y * xw.ch,
3916 xw.cw - 1, 1);
3917 XftDrawRect(xw.draw, &drawcol,
3918 borderpx + curx * xw.cw,
3919 borderpx + term.c.y * xw.ch,
3920 1, xw.ch - 1);
3921 XftDrawRect(xw.draw, &drawcol,
3922 borderpx + (curx + 1) * xw.cw - 1,
3923 borderpx + term.c.y * xw.ch,
3924 1, xw.ch - 1);
3925 XftDrawRect(xw.draw, &drawcol,
3926 borderpx + curx * xw.cw,
3927 borderpx + (term.c.y + 1) * xw.ch - 1,
3928 xw.cw, 1);
3929 }
3930 oldx = curx, oldy = term.c.y;
3931 }
3932
3933
3934 void
3935 xsettitle(char *p)
3936 {
3937 XTextProperty prop;
3938
3939 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3940 &prop);
3941 XSetWMName(xw.dpy, xw.win, &prop);
3942 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3943 XFree(prop.value);
3944 }
3945
3946 void
3947 xresettitle(void)
3948 {
3949 xsettitle(opt_title ? opt_title : "st");
3950 }
3951
3952 void
3953 redraw(void)
3954 {
3955 tfulldirt();
3956 draw();
3957 }
3958
3959 void
3960 draw(void)
3961 {
3962 drawregion(0, 0, term.col, term.row);
3963 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3964 xw.h, 0, 0);
3965 XSetForeground(xw.dpy, dc.gc,
3966 dc.col[IS_SET(MODE_REVERSE)?
3967 defaultfg : defaultbg].pixel);
3968 }
3969
3970 void
3971 drawregion(int x1, int y1, int x2, int y2)
3972 {
3973 int i, x, y, ox, numspecs;
3974 Glyph base, new;
3975 XftGlyphFontSpec *specs;
3976 int ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3977
3978 if (!(xw.state & WIN_VISIBLE))
3979 return;
3980
3981 for (y = y1; y < y2; y++) {
3982 if (!term.dirty[y])
3983 continue;
3984
3985 xtermclear(0, y, term.col, y);
3986 term.dirty[y] = 0;
3987
3988 specs = term.specbuf;
3989 numspecs = xmakeglyphfontspecs(specs, &term.line[y][x1], x2 - x1, x1, y);
3990
3991 i = ox = 0;
3992 for (x = x1; x < x2 && i < numspecs; x++) {
3993 new = term.line[y][x];
3994 if (new.mode == ATTR_WDUMMY)
3995 continue;
3996 if (ena_sel && selected(x, y))
3997 new.mode ^= ATTR_REVERSE;
3998 if (i > 0 && ATTRCMP(base, new)) {
3999 xdrawglyphfontspecs(specs, base, i, ox, y);
4000 specs += i;
4001 numspecs -= i;
4002 i = 0;
4003 }
4004 if (i == 0) {
4005 ox = x;
4006 base = new;
4007 }
4008 i++;
4009 }
4010 if (i > 0)
4011 xdrawglyphfontspecs(specs, base, i, ox, y);
4012 }
4013 xdrawcursor();
4014 }
4015
4016 void
4017 expose(XEvent *ev)
4018 {
4019 redraw();
4020 }
4021
4022 void
4023 visibility(XEvent *ev)
4024 {
4025 XVisibilityEvent *e = &ev->xvisibility;
4026
4027 MODBIT(xw.state, e->state != VisibilityFullyObscured, WIN_VISIBLE);
4028 }
4029
4030 void
4031 unmap(XEvent *ev)
4032 {
4033 xw.state &= ~WIN_VISIBLE;
4034 }
4035
4036 void
4037 xsetpointermotion(int set)
4038 {
4039 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
4040 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
4041 }
4042
4043 void
4044 xseturgency(int add)
4045 {
4046 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
4047
4048 MODBIT(h->flags, add, XUrgencyHint);
4049 XSetWMHints(xw.dpy, xw.win, h);
4050 XFree(h);
4051 }
4052
4053 void
4054 focus(XEvent *ev)
4055 {
4056 XFocusChangeEvent *e = &ev->xfocus;
4057
4058 if (e->mode == NotifyGrab)
4059 return;
4060
4061 if (ev->type == FocusIn) {
4062 XSetICFocus(xw.xic);
4063 xw.state |= WIN_FOCUSED;
4064 xseturgency(0);
4065 if (IS_SET(MODE_FOCUS))
4066 ttywrite("\033[I", 3);
4067 } else {
4068 XUnsetICFocus(xw.xic);
4069 xw.state &= ~WIN_FOCUSED;
4070 if (IS_SET(MODE_FOCUS))
4071 ttywrite("\033[O", 3);
4072 }
4073 }
4074
4075 int
4076 match(uint mask, uint state)
4077 {
4078 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
4079 }
4080
4081 void
4082 numlock(const Arg *dummy)
4083 {
4084 term.numlock ^= 1;
4085 }
4086
4087 char*
4088 kmap(KeySym k, uint state)
4089 {
4090 Key *kp;
4091 int i;
4092
4093 /* Check for mapped keys out of X11 function keys. */
4094 for (i = 0; i < LEN(mappedkeys); i++) {
4095 if (mappedkeys[i] == k)
4096 break;
4097 }
4098 if (i == LEN(mappedkeys)) {
4099 if ((k & 0xFFFF) < 0xFD00)
4100 return NULL;
4101 }
4102
4103 for (kp = key; kp < key + LEN(key); kp++) {
4104 if (kp->k != k)
4105 continue;
4106
4107 if (!match(kp->mask, state))
4108 continue;
4109
4110 if (IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
4111 continue;
4112 if (term.numlock && kp->appkey == 2)
4113 continue;
4114
4115 if (IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
4116 continue;
4117
4118 if (IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
4119 continue;
4120
4121 return kp->s;
4122 }
4123
4124 return NULL;
4125 }
4126
4127 void
4128 kpress(XEvent *ev)
4129 {
4130 XKeyEvent *e = &ev->xkey;
4131 KeySym ksym;
4132 char buf[32], *customkey;
4133 int len;
4134 Rune c;
4135 Status status;
4136 Shortcut *bp;
4137
4138 if (IS_SET(MODE_KBDLOCK))
4139 return;
4140
4141 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
4142 /* 1. shortcuts */
4143 for (bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
4144 if (ksym == bp->keysym && match(bp->mod, e->state)) {
4145 bp->func(&(bp->arg));
4146 return;
4147 }
4148 }
4149
4150 /* 2. custom keys from config.h */
4151 if ((customkey = kmap(ksym, e->state))) {
4152 ttysend(customkey, strlen(customkey));
4153 return;
4154 }
4155
4156 /* 3. composed string from input method */
4157 if (len == 0)
4158 return;
4159 if (len == 1 && e->state & Mod1Mask) {
4160 if (IS_SET(MODE_8BIT)) {
4161 if (*buf < 0177) {
4162 c = *buf | 0x80;
4163 len = utf8encode(c, buf);
4164 }
4165 } else {
4166 buf[1] = buf[0];
4167 buf[0] = '\033';
4168 len = 2;
4169 }
4170 }
4171 ttysend(buf, len);
4172 }
4173
4174
4175 void
4176 cmessage(XEvent *e)
4177 {
4178 /*
4179 * See xembed specs
4180 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
4181 */
4182 if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
4183 if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
4184 xw.state |= WIN_FOCUSED;
4185 xseturgency(0);
4186 } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
4187 xw.state &= ~WIN_FOCUSED;
4188 }
4189 } else if (e->xclient.data.l[0] == xw.wmdeletewin) {
4190 /* Send SIGHUP to shell */
4191 kill(pid, SIGHUP);
4192 exit(0);
4193 }
4194 }
4195
4196 void
4197 cresize(int width, int height)
4198 {
4199 int col, row;
4200
4201 if (width != 0)
4202 xw.w = width;
4203 if (height != 0)
4204 xw.h = height;
4205
4206 col = (xw.w - 2 * borderpx) / xw.cw;
4207 row = (xw.h - 2 * borderpx) / xw.ch;
4208
4209 tresize(col, row);
4210 xresize(col, row);
4211 ttyresize();
4212 }
4213
4214 void
4215 resize(XEvent *e)
4216 {
4217 if (e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
4218 return;
4219
4220 cresize(e->xconfigure.width, e->xconfigure.height);
4221 }
4222
4223 void
4224 run(void)
4225 {
4226 XEvent ev;
4227 int w = xw.w, h = xw.h;
4228 fd_set rfd;
4229 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
4230 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
4231 long deltatime;
4232
4233 /* Waiting for window mapping */
4234 do {
4235 XNextEvent(xw.dpy, &ev);
4236 /*
4237 * This XFilterEvent call is required because of XOpenIM. It
4238 * does filter out the key event and some client message for
4239 * the input method too.
4240 */
4241 if (XFilterEvent(&ev, None))
4242 continue;
4243 if (ev.type == ConfigureNotify) {
4244 w = ev.xconfigure.width;
4245 h = ev.xconfigure.height;
4246 }
4247 } while (ev.type != MapNotify);
4248
4249 ttynew();
4250 cresize(w, h);
4251
4252 clock_gettime(CLOCK_MONOTONIC, &last);
4253 lastblink = last;
4254
4255 for (xev = actionfps;;) {
4256 FD_ZERO(&rfd);
4257 FD_SET(cmdfd, &rfd);
4258 FD_SET(xfd, &rfd);
4259
4260 if (pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
4261 if (errno == EINTR)
4262 continue;
4263 die("select failed: %s\n", strerror(errno));
4264 }
4265 if (FD_ISSET(cmdfd, &rfd)) {
4266 ttyread();
4267 if (blinktimeout) {
4268 blinkset = tattrset(ATTR_BLINK);
4269 if (!blinkset)
4270 MODBIT(term.mode, 0, MODE_BLINK);
4271 }
4272 }
4273
4274 if (FD_ISSET(xfd, &rfd))
4275 xev = actionfps;
4276
4277 clock_gettime(CLOCK_MONOTONIC, &now);
4278 drawtimeout.tv_sec = 0;
4279 drawtimeout.tv_nsec = (1000 * 1E6)/ xfps;
4280 tv = &drawtimeout;
4281
4282 dodraw = 0;
4283 if (blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
4284 tsetdirtattr(ATTR_BLINK);
4285 term.mode ^= MODE_BLINK;
4286 lastblink = now;
4287 dodraw = 1;
4288 }
4289 deltatime = TIMEDIFF(now, last);
4290 if (deltatime > 1000 / (xev ? xfps : actionfps)) {
4291 dodraw = 1;
4292 last = now;
4293 }
4294
4295 if (dodraw) {
4296 while (XPending(xw.dpy)) {
4297 XNextEvent(xw.dpy, &ev);
4298 if (XFilterEvent(&ev, None))
4299 continue;
4300 if (handler[ev.type])
4301 (handler[ev.type])(&ev);
4302 }
4303
4304 draw();
4305 XFlush(xw.dpy);
4306
4307 if (xev && !FD_ISSET(xfd, &rfd))
4308 xev--;
4309 if (!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
4310 if (blinkset) {
4311 if (TIMEDIFF(now, lastblink) \
4312 > blinktimeout) {
4313 drawtimeout.tv_nsec = 1000;
4314 } else {
4315 drawtimeout.tv_nsec = (1E6 * \
4316 (blinktimeout - \
4317 TIMEDIFF(now,
4318 lastblink)));
4319 }
4320 drawtimeout.tv_sec = \
4321 drawtimeout.tv_nsec / 1E9;
4322 drawtimeout.tv_nsec %= (long)1E9;
4323 } else {
4324 tv = NULL;
4325 }
4326 }
4327 }
4328 }
4329 }
4330
4331 void
4332 usage(void)
4333 {
4334 die("%s " VERSION " (c) 2010-2016 st engineers\n"
4335 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
4336 " [-i] [-t title] [-T title] [-w windowid] [-e command ...]"
4337 " [command ...]\n"
4338 " st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
4339 " [-i] [-t title] [-T title] [-w windowid] -l line"
4340 " [stty_args ...]\n",
4341 argv0);
4342 }
4343
4344 int
4345 main(int argc, char *argv[])
4346 {
4347 uint cols = 80, rows = 24;
4348
4349 xw.l = xw.t = 0;
4350 xw.isfixed = False;
4351 xw.cursor = cursorshape;
4352
4353 ARGBEGIN {
4354 case 'a':
4355 allowaltscreen = 0;
4356 break;
4357 case 'c':
4358 opt_class = EARGF(usage());
4359 break;
4360 case 'e':
4361 if (argc > 0)
4362 --argc, ++argv;
4363 goto run;
4364 case 'f':
4365 opt_font = EARGF(usage());
4366 break;
4367 case 'g':
4368 xw.gm = XParseGeometry(EARGF(usage()),
4369 &xw.l, &xw.t, &cols, &rows);
4370 break;
4371 case 'i':
4372 xw.isfixed = 1;
4373 break;
4374 case 'o':
4375 opt_io = EARGF(usage());
4376 break;
4377 case 'l':
4378 opt_line = EARGF(usage());
4379 break;
4380 case 't':
4381 case 'T':
4382 opt_title = EARGF(usage());
4383 break;
4384 case 'w':
4385 opt_embed = EARGF(usage());
4386 break;
4387 case 'v':
4388 default:
4389 usage();
4390 } ARGEND;
4391
4392 run:
4393 if (argc > 0) {
4394 /* eat all remaining arguments */
4395 opt_cmd = argv;
4396 if (!opt_title && !opt_line)
4397 opt_title = basename(xstrdup(argv[0]));
4398 }
4399 setlocale(LC_CTYPE, "");
4400 XSetLocaleModifiers("");
4401 tnew(MAX(cols, 1), MAX(rows, 1));
4402 xinit();
4403 selinit();
4404 run();
4405
4406 return 0;
4407 }
4408