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