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Add parsing of DCS q sequences
[st.git] / st.c
blob6c1638651fe372e829ec57dd47e3e4a0fbb9f920
1 /* See LICENSE for license details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdio.h>
10 #include <stdlib.h>
11 #include <string.h>
12 #include <signal.h>
13 #include <stdint.h>
14 #include <sys/ioctl.h>
15 #include <sys/select.h>
16 #include <sys/stat.h>
17 #include <sys/time.h>
18 #include <sys/types.h>
19 #include <sys/wait.h>
20 #include <termios.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <libgen.h>
24 #include <X11/Xatom.h>
25 #include <X11/Xlib.h>
26 #include <X11/Xutil.h>
27 #include <X11/cursorfont.h>
28 #include <X11/keysym.h>
29 #include <X11/Xft/Xft.h>
30 #include <X11/XKBlib.h>
31 #include <fontconfig/fontconfig.h>
32 #include <wchar.h>
33
34 #include "arg.h"
35
36 char *argv0;
37
38 #define Glyph Glyph_
39 #define Font Font_
40
41 #if defined(__linux)
42 #include <pty.h>
43 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
44 #include <util.h>
45 #elif defined(__FreeBSD__) || defined(__DragonFly__)
46 #include <libutil.h>
47 #endif
48
49
50 /* XEMBED messages */
51 #define XEMBED_FOCUS_IN 4
52 #define XEMBED_FOCUS_OUT 5
53
54 /* Arbitrary sizes */
55 #define UTF_INVALID 0xFFFD
56 #define UTF_SIZ 4
57 #define ESC_BUF_SIZ (128*UTF_SIZ)
58 #define ESC_ARG_SIZ 16
59 #define STR_BUF_SIZ ESC_BUF_SIZ
60 #define STR_ARG_SIZ ESC_ARG_SIZ
61 #define XK_ANY_MOD UINT_MAX
62 #define XK_NO_MOD 0
63 #define XK_SWITCH_MOD (1<<13)
64
65 /* macros */
66 #define MIN(a, b) ((a) < (b) ? (a) : (b))
67 #define MAX(a, b) ((a) < (b) ? (b) : (a))
68 #define LEN(a) (sizeof(a) / sizeof(a)[0])
69 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
70 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
71 #define DIVCEIL(n, d) (((n) + ((d) - 1)) / (d))
72 #define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f) || (c) == '\177')
73 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
74 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
75 #define ISDELIM(u) (utf8strchr(worddelimiters, u) != NULL)
76 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
77 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || \
78 (a).bg != (b).bg)
79 #define IS_SET(flag) ((term.mode & (flag)) != 0)
80 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + \
81 (t1.tv_nsec-t2.tv_nsec)/1E6)
82 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
83
84 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
85 #define IS_TRUECOL(x) (1 << 24 & (x))
86 #define TRUERED(x) (((x) & 0xff0000) >> 8)
87 #define TRUEGREEN(x) (((x) & 0xff00))
88 #define TRUEBLUE(x) (((x) & 0xff) << 8)
89
90
91 enum glyph_attribute {
92 ATTR_NULL = 0,
93 ATTR_BOLD = 1 << 0,
94 ATTR_FAINT = 1 << 1,
95 ATTR_ITALIC = 1 << 2,
96 ATTR_UNDERLINE = 1 << 3,
97 ATTR_BLINK = 1 << 4,
98 ATTR_REVERSE = 1 << 5,
99 ATTR_INVISIBLE = 1 << 6,
100 ATTR_STRUCK = 1 << 7,
101 ATTR_WRAP = 1 << 8,
102 ATTR_WIDE = 1 << 9,
103 ATTR_WDUMMY = 1 << 10,
104 ATTR_BOLD_FAINT = ATTR_BOLD | ATTR_FAINT,
105 };
106
107 enum cursor_movement {
108 CURSOR_SAVE,
109 CURSOR_LOAD
110 };
111
112 enum cursor_state {
113 CURSOR_DEFAULT = 0,
114 CURSOR_WRAPNEXT = 1,
115 CURSOR_ORIGIN = 2
116 };
117
118 enum term_mode {
119 MODE_WRAP = 1 << 0,
120 MODE_INSERT = 1 << 1,
121 MODE_APPKEYPAD = 1 << 2,
122 MODE_ALTSCREEN = 1 << 3,
123 MODE_CRLF = 1 << 4,
124 MODE_MOUSEBTN = 1 << 5,
125 MODE_MOUSEMOTION = 1 << 6,
126 MODE_REVERSE = 1 << 7,
127 MODE_KBDLOCK = 1 << 8,
128 MODE_HIDE = 1 << 9,
129 MODE_ECHO = 1 << 10,
130 MODE_APPCURSOR = 1 << 11,
131 MODE_MOUSESGR = 1 << 12,
132 MODE_8BIT = 1 << 13,
133 MODE_BLINK = 1 << 14,
134 MODE_FBLINK = 1 << 15,
135 MODE_FOCUS = 1 << 16,
136 MODE_MOUSEX10 = 1 << 17,
137 MODE_MOUSEMANY = 1 << 18,
138 MODE_BRCKTPASTE = 1 << 19,
139 MODE_PRINT = 1 << 20,
140 MODE_UTF8 = 1 << 21,
141 MODE_SIXEL = 1 << 22,
142 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
143 |MODE_MOUSEMANY,
144 };
145
146 enum charset {
147 CS_GRAPHIC0,
148 CS_GRAPHIC1,
149 CS_UK,
150 CS_USA,
151 CS_MULTI,
152 CS_GER,
153 CS_FIN
154 };
155
156 enum escape_state {
157 ESC_START = 1,
158 ESC_CSI = 2,
159 ESC_STR = 4, /* OSC, PM, APC */
160 ESC_ALTCHARSET = 8,
161 ESC_STR_END = 16, /* a final string was encountered */
162 ESC_TEST = 32, /* Enter in test mode */
163 ESC_UTF8 = 64,
164 ESC_DCS =128,
165 };
166
167 enum window_state {
168 WIN_VISIBLE = 1,
169 WIN_FOCUSED = 2
170 };
171
172 enum selection_mode {
173 SEL_IDLE = 0,
174 SEL_EMPTY = 1,
175 SEL_READY = 2
176 };
177
178 enum selection_type {
179 SEL_REGULAR = 1,
180 SEL_RECTANGULAR = 2
181 };
182
183 enum selection_snap {
184 SNAP_WORD = 1,
185 SNAP_LINE = 2
186 };
187
188 typedef unsigned char uchar;
189 typedef unsigned int uint;
190 typedef unsigned long ulong;
191 typedef unsigned short ushort;
192
193 typedef uint_least32_t Rune;
194
195 typedef XftDraw *Draw;
196 typedef XftColor Color;
197
198 typedef struct {
199 Rune u; /* character code */
200 ushort mode; /* attribute flags */
201 uint32_t fg; /* foreground */
202 uint32_t bg; /* background */
203 } Glyph;
204
205 typedef Glyph *Line;
206
207 typedef struct {
208 Glyph attr; /* current char attributes */
209 int x;
210 int y;
211 char state;
212 } TCursor;
213
214 /* CSI Escape sequence structs */
215 /* ESC '[' [[ [<priv>] <arg> [;]] <mode> [<mode>]] */
216 typedef struct {
217 char buf[ESC_BUF_SIZ]; /* raw string */
218 int len; /* raw string length */
219 char priv;
220 int arg[ESC_ARG_SIZ];
221 int narg; /* nb of args */
222 char mode[2];
223 } CSIEscape;
224
225 /* STR Escape sequence structs */
226 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
227 typedef struct {
228 char type; /* ESC type ... */
229 char buf[STR_BUF_SIZ]; /* raw string */
230 int len; /* raw string length */
231 char *args[STR_ARG_SIZ];
232 int narg; /* nb of args */
233 } STREscape;
234
235 /* Internal representation of the screen */
236 typedef struct {
237 int row; /* nb row */
238 int col; /* nb col */
239 Line *line; /* screen */
240 Line *alt; /* alternate screen */
241 int *dirty; /* dirtyness of lines */
242 XftGlyphFontSpec *specbuf; /* font spec buffer used for rendering */
243 TCursor c; /* cursor */
244 int top; /* top scroll limit */
245 int bot; /* bottom scroll limit */
246 int mode; /* terminal mode flags */
247 int esc; /* escape state flags */
248 char trantbl[4]; /* charset table translation */
249 int charset; /* current charset */
250 int icharset; /* selected charset for sequence */
251 int numlock; /* lock numbers in keyboard */
252 int *tabs;
253 } Term;
254
255 /* Purely graphic info */
256 typedef struct {
257 Display *dpy;
258 Colormap cmap;
259 Window win;
260 Drawable buf;
261 Atom xembed, wmdeletewin, netwmname, netwmpid;
262 XIM xim;
263 XIC xic;
264 Draw draw;
265 Visual *vis;
266 XSetWindowAttributes attrs;
267 int scr;
268 int isfixed; /* is fixed geometry? */
269 int l, t; /* left and top offset */
270 int gm; /* geometry mask */
271 int tw, th; /* tty width and height */
272 int w, h; /* window width and height */
273 int ch; /* char height */
274 int cw; /* char width */
275 char state; /* focus, redraw, visible */
276 int cursor; /* cursor style */
277 } XWindow;
278
279 typedef struct {
280 uint b;
281 uint mask;
282 char *s;
283 } MouseShortcut;
284
285 typedef struct {
286 KeySym k;
287 uint mask;
288 char *s;
289 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
290 signed char appkey; /* application keypad */
291 signed char appcursor; /* application cursor */
292 signed char crlf; /* crlf mode */
293 } Key;
294
295 typedef struct {
296 int mode;
297 int type;
298 int snap;
299 /*
300 * Selection variables:
301 * nb – normalized coordinates of the beginning of the selection
302 * ne – normalized coordinates of the end of the selection
303 * ob – original coordinates of the beginning of the selection
304 * oe – original coordinates of the end of the selection
305 */
306 struct {
307 int x, y;
308 } nb, ne, ob, oe;
309
310 char *primary, *clipboard;
311 Atom xtarget;
312 int alt;
313 struct timespec tclick1;
314 struct timespec tclick2;
315 } Selection;
316
317 typedef union {
318 int i;
319 uint ui;
320 float f;
321 const void *v;
322 } Arg;
323
324 typedef struct {
325 uint mod;
326 KeySym keysym;
327 void (*func)(const Arg *);
328 const Arg arg;
329 } Shortcut;
330
331 /* function definitions used in config.h */
332 static void clipcopy(const Arg *);
333 static void clippaste(const Arg *);
334 static void numlock(const Arg *);
335 static void selpaste(const Arg *);
336 static void xzoom(const Arg *);
337 static void xzoomabs(const Arg *);
338 static void xzoomreset(const Arg *);
339 static void printsel(const Arg *);
340 static void printscreen(const Arg *) ;
341 static void toggleprinter(const Arg *);
342 static void sendbreak(const Arg *);
343
344 /* Config.h for applying patches and the configuration. */
345 #include "config.h"
346
347 /* Font structure */
348 typedef struct {
349 int height;
350 int width;
351 int ascent;
352 int descent;
353 short lbearing;
354 short rbearing;
355 XftFont *match;
356 FcFontSet *set;
357 FcPattern *pattern;
358 } Font;
359
360 /* Drawing Context */
361 typedef struct {
362 Color col[MAX(LEN(colorname), 256)];
363 Font font, bfont, ifont, ibfont;
364 GC gc;
365 } DC;
366
367 static void die(const char *, ...);
368 static void draw(void);
369 static void redraw(void);
370 static void drawregion(int, int, int, int);
371 static void execsh(void);
372 static void stty(void);
373 static void sigchld(int);
374 static void run(void);
375
376 static void csidump(void);
377 static void csihandle(void);
378 static void csiparse(void);
379 static void csireset(void);
380 static int eschandle(uchar);
381 static void strdump(void);
382 static void strhandle(void);
383 static void strparse(void);
384 static void strreset(void);
385
386 static int tattrset(int);
387 static void tprinter(char *, size_t);
388 static void tdumpsel(void);
389 static void tdumpline(int);
390 static void tdump(void);
391 static void tclearregion(int, int, int, int);
392 static void tcursor(int);
393 static void tdeletechar(int);
394 static void tdeleteline(int);
395 static void tinsertblank(int);
396 static void tinsertblankline(int);
397 static int tlinelen(int);
398 static void tmoveto(int, int);
399 static void tmoveato(int, int);
400 static void tnew(int, int);
401 static void tnewline(int);
402 static void tputtab(int);
403 static void tputc(Rune);
404 static void treset(void);
405 static void tresize(int, int);
406 static void tscrollup(int, int);
407 static void tscrolldown(int, int);
408 static void tsetattr(int *, int);
409 static void tsetchar(Rune, Glyph *, int, int);
410 static void tsetscroll(int, int);
411 static void tswapscreen(void);
412 static void tsetdirt(int, int);
413 static void tsetdirtattr(int);
414 static void tsetmode(int, int, int *, int);
415 static void tfulldirt(void);
416 static void techo(Rune);
417 static void tcontrolcode(uchar );
418 static void tdectest(char );
419 static void tdefutf8(char);
420 static int32_t tdefcolor(int *, int *, int);
421 static void tdeftran(char);
422 static inline int match(uint, uint);
423 static void ttynew(void);
424 static size_t ttyread(void);
425 static void ttyresize(void);
426 static void ttysend(char *, size_t);
427 static void ttywrite(const char *, size_t);
428 static void tstrsequence(uchar);
429
430 static inline ushort sixd_to_16bit(int);
431 static int xmakeglyphfontspecs(XftGlyphFontSpec *, const Glyph *, int, int, int);
432 static void xdrawglyphfontspecs(const XftGlyphFontSpec *, Glyph, int, int, int);
433 static void xdrawglyph(Glyph, int, int);
434 static void xhints(void);
435 static void xclear(int, int, int, int);
436 static void xdrawcursor(void);
437 static void xinit(void);
438 static void xloadcols(void);
439 static int xsetcolorname(int, const char *);
440 static int xgeommasktogravity(int);
441 static int xloadfont(Font *, FcPattern *);
442 static void xloadfonts(char *, double);
443 static void xsettitle(char *);
444 static void xresettitle(void);
445 static void xsetpointermotion(int);
446 static void xseturgency(int);
447 static void xsetsel(char *, Time);
448 static void xunloadfont(Font *);
449 static void xunloadfonts(void);
450 static void xresize(int, int);
451
452 static void expose(XEvent *);
453 static void visibility(XEvent *);
454 static void unmap(XEvent *);
455 static char *kmap(KeySym, uint);
456 static void kpress(XEvent *);
457 static void cmessage(XEvent *);
458 static void cresize(int, int);
459 static void resize(XEvent *);
460 static void focus(XEvent *);
461 static void brelease(XEvent *);
462 static void bpress(XEvent *);
463 static void bmotion(XEvent *);
464 static void propnotify(XEvent *);
465 static void selnotify(XEvent *);
466 static void selclear(XEvent *);
467 static void selrequest(XEvent *);
468
469 static void selinit(void);
470 static void selnormalize(void);
471 static inline int selected(int, int);
472 static char *getsel(void);
473 static void selcopy(Time);
474 static void selscroll(int, int);
475 static void selsnap(int *, int *, int);
476 static int x2col(int);
477 static int y2row(int);
478 static void getbuttoninfo(XEvent *);
479 static void mousereport(XEvent *);
480
481 static size_t utf8decode(char *, Rune *, size_t);
482 static Rune utf8decodebyte(char, size_t *);
483 static size_t utf8encode(Rune, char *);
484 static char utf8encodebyte(Rune, size_t);
485 static char *utf8strchr(char *s, Rune u);
486 static size_t utf8validate(Rune *, size_t);
487
488 static ssize_t xwrite(int, const char *, size_t);
489 static void *xmalloc(size_t);
490 static void *xrealloc(void *, size_t);
491 static char *xstrdup(char *);
492
493 static void usage(void);
494
495 static void (*handler[LASTEvent])(XEvent *) = {
496 [KeyPress] = kpress,
497 [ClientMessage] = cmessage,
498 [ConfigureNotify] = resize,
499 [VisibilityNotify] = visibility,
500 [UnmapNotify] = unmap,
501 [Expose] = expose,
502 [FocusIn] = focus,
503 [FocusOut] = focus,
504 [MotionNotify] = bmotion,
505 [ButtonPress] = bpress,
506 [ButtonRelease] = brelease,
507 /*
508 * Uncomment if you want the selection to disappear when you select something
509 * different in another window.
510 */
511 /* [SelectionClear] = selclear, */
512 [SelectionNotify] = selnotify,
513 /*
514 * PropertyNotify is only turned on when there is some INCR transfer happening
515 * for the selection retrieval.
516 */
517 [PropertyNotify] = propnotify,
518 [SelectionRequest] = selrequest,
519 };
520
521 /* Globals */
522 static DC dc;
523 static XWindow xw;
524 static Term term;
525 static CSIEscape csiescseq;
526 static STREscape strescseq;
527 static int cmdfd;
528 static pid_t pid;
529 static Selection sel;
530 static int iofd = 1;
531 static char **opt_cmd = NULL;
532 static char *opt_class = NULL;
533 static char *opt_embed = NULL;
534 static char *opt_font = NULL;
535 static char *opt_io = NULL;
536 static char *opt_line = NULL;
537 static char *opt_name = NULL;
538 static char *opt_title = NULL;
539 static int oldbutton = 3; /* button event on startup: 3 = release */
540
541 static char *usedfont = NULL;
542 static double usedfontsize = 0;
543 static double defaultfontsize = 0;
544
545 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
546 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
547 static Rune utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
548 static Rune utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
549
550 /* Font Ring Cache */
551 enum {
552 FRC_NORMAL,
553 FRC_ITALIC,
554 FRC_BOLD,
555 FRC_ITALICBOLD
556 };
557
558 typedef struct {
559 XftFont *font;
560 int flags;
561 Rune unicodep;
562 } Fontcache;
563
564 /* Fontcache is an array now. A new font will be appended to the array. */
565 static Fontcache frc[16];
566 static int frclen = 0;
567
568 ssize_t
569 xwrite(int fd, const char *s, size_t len)
570 {
571 size_t aux = len;
572 ssize_t r;
573
574 while (len > 0) {
575 r = write(fd, s, len);
576 if (r < 0)
577 return r;
578 len -= r;
579 s += r;
580 }
581
582 return aux;
583 }
584
585 void *
586 xmalloc(size_t len)
587 {
588 void *p = malloc(len);
589
590 if (!p)
591 die("Out of memory\n");
592
593 return p;
594 }
595
596 void *
597 xrealloc(void *p, size_t len)
598 {
599 if ((p = realloc(p, len)) == NULL)
600 die("Out of memory\n");
601
602 return p;
603 }
604
605 char *
606 xstrdup(char *s)
607 {
608 if ((s = strdup(s)) == NULL)
609 die("Out of memory\n");
610
611 return s;
612 }
613
614 size_t
615 utf8decode(char *c, Rune *u, size_t clen)
616 {
617 size_t i, j, len, type;
618 Rune udecoded;
619
620 *u = UTF_INVALID;
621 if (!clen)
622 return 0;
623 udecoded = utf8decodebyte(c[0], &len);
624 if (!BETWEEN(len, 1, UTF_SIZ))
625 return 1;
626 for (i = 1, j = 1; i < clen && j < len; ++i, ++j) {
627 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
628 if (type != 0)
629 return j;
630 }
631 if (j < len)
632 return 0;
633 *u = udecoded;
634 utf8validate(u, len);
635
636 return len;
637 }
638
639 Rune
640 utf8decodebyte(char c, size_t *i)
641 {
642 for (*i = 0; *i < LEN(utfmask); ++(*i))
643 if (((uchar)c & utfmask[*i]) == utfbyte[*i])
644 return (uchar)c & ~utfmask[*i];
645
646 return 0;
647 }
648
649 size_t
650 utf8encode(Rune u, char *c)
651 {
652 size_t len, i;
653
654 len = utf8validate(&u, 0);
655 if (len > UTF_SIZ)
656 return 0;
657
658 for (i = len - 1; i != 0; --i) {
659 c[i] = utf8encodebyte(u, 0);
660 u >>= 6;
661 }
662 c[0] = utf8encodebyte(u, len);
663
664 return len;
665 }
666
667 char
668 utf8encodebyte(Rune u, size_t i)
669 {
670 return utfbyte[i] | (u & ~utfmask[i]);
671 }
672
673 char *
674 utf8strchr(char *s, Rune u)
675 {
676 Rune r;
677 size_t i, j, len;
678
679 len = strlen(s);
680 for (i = 0, j = 0; i < len; i += j) {
681 if (!(j = utf8decode(&s[i], &r, len - i)))
682 break;
683 if (r == u)
684 return &(s[i]);
685 }
686
687 return NULL;
688 }
689
690 size_t
691 utf8validate(Rune *u, size_t i)
692 {
693 if (!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
694 *u = UTF_INVALID;
695 for (i = 1; *u > utfmax[i]; ++i)
696 ;
697
698 return i;
699 }
700
701 void
702 selinit(void)
703 {
704 clock_gettime(CLOCK_MONOTONIC, &sel.tclick1);
705 clock_gettime(CLOCK_MONOTONIC, &sel.tclick2);
706 sel.mode = SEL_IDLE;
707 sel.snap = 0;
708 sel.ob.x = -1;
709 sel.primary = NULL;
710 sel.clipboard = NULL;
711 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
712 if (sel.xtarget == None)
713 sel.xtarget = XA_STRING;
714 }
715
716 int
717 x2col(int x)
718 {
719 x -= borderpx;
720 x /= xw.cw;
721
722 return LIMIT(x, 0, term.col-1);
723 }
724
725 int
726 y2row(int y)
727 {
728 y -= borderpx;
729 y /= xw.ch;
730
731 return LIMIT(y, 0, term.row-1);
732 }
733
734 int
735 tlinelen(int y)
736 {
737 int i = term.col;
738
739 if (term.line[y][i - 1].mode & ATTR_WRAP)
740 return i;
741
742 while (i > 0 && term.line[y][i - 1].u == ' ')
743 --i;
744
745 return i;
746 }
747
748 void
749 selnormalize(void)
750 {
751 int i;
752
753 if (sel.type == SEL_REGULAR && sel.ob.y != sel.oe.y) {
754 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
755 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
756 } else {
757 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
758 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
759 }
760 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
761 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
762
763 selsnap(&sel.nb.x, &sel.nb.y, -1);
764 selsnap(&sel.ne.x, &sel.ne.y, +1);
765
766 /* expand selection over line breaks */
767 if (sel.type == SEL_RECTANGULAR)
768 return;
769 i = tlinelen(sel.nb.y);
770 if (i < sel.nb.x)
771 sel.nb.x = i;
772 if (tlinelen(sel.ne.y) <= sel.ne.x)
773 sel.ne.x = term.col - 1;
774 }
775
776 int
777 selected(int x, int y)
778 {
779 if (sel.mode == SEL_EMPTY)
780 return 0;
781
782 if (sel.type == SEL_RECTANGULAR)
783 return BETWEEN(y, sel.nb.y, sel.ne.y)
784 && BETWEEN(x, sel.nb.x, sel.ne.x);
785
786 return BETWEEN(y, sel.nb.y, sel.ne.y)
787 && (y != sel.nb.y || x >= sel.nb.x)
788 && (y != sel.ne.y || x <= sel.ne.x);
789 }
790
791 void
792 selsnap(int *x, int *y, int direction)
793 {
794 int newx, newy, xt, yt;
795 int delim, prevdelim;
796 Glyph *gp, *prevgp;
797
798 switch (sel.snap) {
799 case SNAP_WORD:
800 /*
801 * Snap around if the word wraps around at the end or
802 * beginning of a line.
803 */
804 prevgp = &term.line[*y][*x];
805 prevdelim = ISDELIM(prevgp->u);
806 for (;;) {
807 newx = *x + direction;
808 newy = *y;
809 if (!BETWEEN(newx, 0, term.col - 1)) {
810 newy += direction;
811 newx = (newx + term.col) % term.col;
812 if (!BETWEEN(newy, 0, term.row - 1))
813 break;
814
815 if (direction > 0)
816 yt = *y, xt = *x;
817 else
818 yt = newy, xt = newx;
819 if (!(term.line[yt][xt].mode & ATTR_WRAP))
820 break;
821 }
822
823 if (newx >= tlinelen(newy))
824 break;
825
826 gp = &term.line[newy][newx];
827 delim = ISDELIM(gp->u);
828 if (!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
829 || (delim && gp->u != prevgp->u)))
830 break;
831
832 *x = newx;
833 *y = newy;
834 prevgp = gp;
835 prevdelim = delim;
836 }
837 break;
838 case SNAP_LINE:
839 /*
840 * Snap around if the the previous line or the current one
841 * has set ATTR_WRAP at its end. Then the whole next or
842 * previous line will be selected.
843 */
844 *x = (direction < 0) ? 0 : term.col - 1;
845 if (direction < 0) {
846 for (; *y > 0; *y += direction) {
847 if (!(term.line[*y-1][term.col-1].mode
848 & ATTR_WRAP)) {
849 break;
850 }
851 }
852 } else if (direction > 0) {
853 for (; *y < term.row-1; *y += direction) {
854 if (!(term.line[*y][term.col-1].mode
855 & ATTR_WRAP)) {
856 break;
857 }
858 }
859 }
860 break;
861 }
862 }
863
864 void
865 getbuttoninfo(XEvent *e)
866 {
867 int type;
868 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
869
870 sel.alt = IS_SET(MODE_ALTSCREEN);
871
872 sel.oe.x = x2col(e->xbutton.x);
873 sel.oe.y = y2row(e->xbutton.y);
874 selnormalize();
875
876 sel.type = SEL_REGULAR;
877 for (type = 1; type < LEN(selmasks); ++type) {
878 if (match(selmasks[type], state)) {
879 sel.type = type;
880 break;
881 }
882 }
883 }
884
885 void
886 mousereport(XEvent *e)
887 {
888 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
889 button = e->xbutton.button, state = e->xbutton.state,
890 len;
891 char buf[40];
892 static int ox, oy;
893
894 /* from urxvt */
895 if (e->xbutton.type == MotionNotify) {
896 if (x == ox && y == oy)
897 return;
898 if (!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
899 return;
900 /* MOUSE_MOTION: no reporting if no button is pressed */
901 if (IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
902 return;
903
904 button = oldbutton + 32;
905 ox = x;
906 oy = y;
907 } else {
908 if (!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
909 button = 3;
910 } else {
911 button -= Button1;
912 if (button >= 3)
913 button += 64 - 3;
914 }
915 if (e->xbutton.type == ButtonPress) {
916 oldbutton = button;
917 ox = x;
918 oy = y;
919 } else if (e->xbutton.type == ButtonRelease) {
920 oldbutton = 3;
921 /* MODE_MOUSEX10: no button release reporting */
922 if (IS_SET(MODE_MOUSEX10))
923 return;
924 if (button == 64 || button == 65)
925 return;
926 }
927 }
928
929 if (!IS_SET(MODE_MOUSEX10)) {
930 button += ((state & ShiftMask ) ? 4 : 0)
931 + ((state & Mod4Mask ) ? 8 : 0)
932 + ((state & ControlMask) ? 16 : 0);
933 }
934
935 if (IS_SET(MODE_MOUSESGR)) {
936 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
937 button, x+1, y+1,
938 e->xbutton.type == ButtonRelease ? 'm' : 'M');
939 } else if (x < 223 && y < 223) {
940 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
941 32+button, 32+x+1, 32+y+1);
942 } else {
943 return;
944 }
945
946 ttywrite(buf, len);
947 }
948
949 void
950 bpress(XEvent *e)
951 {
952 struct timespec now;
953 MouseShortcut *ms;
954
955 if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
956 mousereport(e);
957 return;
958 }
959
960 for (ms = mshortcuts; ms < mshortcuts + LEN(mshortcuts); ms++) {
961 if (e->xbutton.button == ms->b
962 && match(ms->mask, e->xbutton.state)) {
963 ttysend(ms->s, strlen(ms->s));
964 return;
965 }
966 }
967
968 if (e->xbutton.button == Button1) {
969 clock_gettime(CLOCK_MONOTONIC, &now);
970
971 /* Clear previous selection, logically and visually. */
972 selclear(NULL);
973 sel.mode = SEL_EMPTY;
974 sel.type = SEL_REGULAR;
975 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
976 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
977
978 /*
979 * If the user clicks below predefined timeouts specific
980 * snapping behaviour is exposed.
981 */
982 if (TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
983 sel.snap = SNAP_LINE;
984 } else if (TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
985 sel.snap = SNAP_WORD;
986 } else {
987 sel.snap = 0;
988 }
989 selnormalize();
990
991 if (sel.snap != 0)
992 sel.mode = SEL_READY;
993 tsetdirt(sel.nb.y, sel.ne.y);
994 sel.tclick2 = sel.tclick1;
995 sel.tclick1 = now;
996 }
997 }
998
999 char *
1000 getsel(void)
1001 {
1002 char *str, *ptr;
1003 int y, bufsize, lastx, linelen;
1004 Glyph *gp, *last;
1005
1006 if (sel.ob.x == -1)
1007 return NULL;
1008
1009 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
1010 ptr = str = xmalloc(bufsize);
1011
1012 /* append every set & selected glyph to the selection */
1013 for (y = sel.nb.y; y <= sel.ne.y; y++) {
1014 if ((linelen = tlinelen(y)) == 0) {
1015 *ptr++ = '\n';
1016 continue;
1017 }
1018
1019 if (sel.type == SEL_RECTANGULAR) {
1020 gp = &term.line[y][sel.nb.x];
1021 lastx = sel.ne.x;
1022 } else {
1023 gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
1024 lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
1025 }
1026 last = &term.line[y][MIN(lastx, linelen-1)];
1027 while (last >= gp && last->u == ' ')
1028 --last;
1029
1030 for ( ; gp <= last; ++gp) {
1031 if (gp->mode & ATTR_WDUMMY)
1032 continue;
1033
1034 ptr += utf8encode(gp->u, ptr);
1035 }
1036
1037 /*
1038 * Copy and pasting of line endings is inconsistent
1039 * in the inconsistent terminal and GUI world.
1040 * The best solution seems like to produce '\n' when
1041 * something is copied from st and convert '\n' to
1042 * '\r', when something to be pasted is received by
1043 * st.
1044 * FIXME: Fix the computer world.
1045 */
1046 if ((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
1047 *ptr++ = '\n';
1048 }
1049 *ptr = 0;
1050 return str;
1051 }
1052
1053 void
1054 selcopy(Time t)
1055 {
1056 xsetsel(getsel(), t);
1057 }
1058
1059 void
1060 propnotify(XEvent *e)
1061 {
1062 XPropertyEvent *xpev;
1063 Atom clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1064
1065 xpev = &e->xproperty;
1066 if (xpev->state == PropertyNewValue &&
1067 (xpev->atom == XA_PRIMARY ||
1068 xpev->atom == clipboard)) {
1069 selnotify(e);
1070 }
1071 }
1072
1073 void
1074 selnotify(XEvent *e)
1075 {
1076 ulong nitems, ofs, rem;
1077 int format;
1078 uchar *data, *last, *repl;
1079 Atom type, incratom, property;
1080
1081 incratom = XInternAtom(xw.dpy, "INCR", 0);
1082
1083 ofs = 0;
1084 if (e->type == SelectionNotify) {
1085 property = e->xselection.property;
1086 } else if(e->type == PropertyNotify) {
1087 property = e->xproperty.atom;
1088 } else {
1089 return;
1090 }
1091 if (property == None)
1092 return;
1093
1094 do {
1095 if (XGetWindowProperty(xw.dpy, xw.win, property, ofs,
1096 BUFSIZ/4, False, AnyPropertyType,
1097 &type, &format, &nitems, &rem,
1098 &data)) {
1099 fprintf(stderr, "Clipboard allocation failed\n");
1100 return;
1101 }
1102
1103 if (e->type == PropertyNotify && nitems == 0 && rem == 0) {
1104 /*
1105 * If there is some PropertyNotify with no data, then
1106 * this is the signal of the selection owner that all
1107 * data has been transferred. We won't need to receive
1108 * PropertyNotify events anymore.
1109 */
1110 MODBIT(xw.attrs.event_mask, 0, PropertyChangeMask);
1111 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
1112 &xw.attrs);
1113 }
1114
1115 if (type == incratom) {
1116 /*
1117 * Activate the PropertyNotify events so we receive
1118 * when the selection owner does send us the next
1119 * chunk of data.
1120 */
1121 MODBIT(xw.attrs.event_mask, 1, PropertyChangeMask);
1122 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
1123 &xw.attrs);
1124
1125 /*
1126 * Deleting the property is the transfer start signal.
1127 */
1128 XDeleteProperty(xw.dpy, xw.win, (int)property);
1129 continue;
1130 }
1131
1132 /*
1133 * As seen in getsel:
1134 * Line endings are inconsistent in the terminal and GUI world
1135 * copy and pasting. When receiving some selection data,
1136 * replace all '\n' with '\r'.
1137 * FIXME: Fix the computer world.
1138 */
1139 repl = data;
1140 last = data + nitems * format / 8;
1141 while ((repl = memchr(repl, '\n', last - repl))) {
1142 *repl++ = '\r';
1143 }
1144
1145 if (IS_SET(MODE_BRCKTPASTE) && ofs == 0)
1146 ttywrite("\033[200~", 6);
1147 ttysend((char *)data, nitems * format / 8);
1148 if (IS_SET(MODE_BRCKTPASTE) && rem == 0)
1149 ttywrite("\033[201~", 6);
1150 XFree(data);
1151 /* number of 32-bit chunks returned */
1152 ofs += nitems * format / 32;
1153 } while (rem > 0);
1154
1155 /*
1156 * Deleting the property again tells the selection owner to send the
1157 * next data chunk in the property.
1158 */
1159 XDeleteProperty(xw.dpy, xw.win, (int)property);
1160 }
1161
1162 void
1163 selpaste(const Arg *dummy)
1164 {
1165 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1166 xw.win, CurrentTime);
1167 }
1168
1169 void
1170 clipcopy(const Arg *dummy)
1171 {
1172 Atom clipboard;
1173
1174 if (sel.clipboard != NULL)
1175 free(sel.clipboard);
1176
1177 if (sel.primary != NULL) {
1178 sel.clipboard = xstrdup(sel.primary);
1179 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1180 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1181 }
1182 }
1183
1184 void
1185 clippaste(const Arg *dummy)
1186 {
1187 Atom clipboard;
1188
1189 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1190 XConvertSelection(xw.dpy, clipboard, sel.xtarget, clipboard,
1191 xw.win, CurrentTime);
1192 }
1193
1194 void
1195 selclear(XEvent *e)
1196 {
1197 if (sel.ob.x == -1)
1198 return;
1199 sel.mode = SEL_IDLE;
1200 sel.ob.x = -1;
1201 tsetdirt(sel.nb.y, sel.ne.y);
1202 }
1203
1204 void
1205 selrequest(XEvent *e)
1206 {
1207 XSelectionRequestEvent *xsre;
1208 XSelectionEvent xev;
1209 Atom xa_targets, string, clipboard;
1210 char *seltext;
1211
1212 xsre = (XSelectionRequestEvent *) e;
1213 xev.type = SelectionNotify;
1214 xev.requestor = xsre->requestor;
1215 xev.selection = xsre->selection;
1216 xev.target = xsre->target;
1217 xev.time = xsre->time;
1218 if (xsre->property == None)
1219 xsre->property = xsre->target;
1220
1221 /* reject */
1222 xev.property = None;
1223
1224 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1225 if (xsre->target == xa_targets) {
1226 /* respond with the supported type */
1227 string = sel.xtarget;
1228 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1229 XA_ATOM, 32, PropModeReplace,
1230 (uchar *) &string, 1);
1231 xev.property = xsre->property;
1232 } else if (xsre->target == sel.xtarget || xsre->target == XA_STRING) {
1233 /*
1234 * xith XA_STRING non ascii characters may be incorrect in the
1235 * requestor. It is not our problem, use utf8.
1236 */
1237 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1238 if (xsre->selection == XA_PRIMARY) {
1239 seltext = sel.primary;
1240 } else if (xsre->selection == clipboard) {
1241 seltext = sel.clipboard;
1242 } else {
1243 fprintf(stderr,
1244 "Unhandled clipboard selection 0x%lx\n",
1245 xsre->selection);
1246 return;
1247 }
1248 if (seltext != NULL) {
1249 XChangeProperty(xsre->display, xsre->requestor,
1250 xsre->property, xsre->target,
1251 8, PropModeReplace,
1252 (uchar *)seltext, strlen(seltext));
1253 xev.property = xsre->property;
1254 }
1255 }
1256
1257 /* all done, send a notification to the listener */
1258 if (!XSendEvent(xsre->display, xsre->requestor, 1, 0, (XEvent *) &xev))
1259 fprintf(stderr, "Error sending SelectionNotify event\n");
1260 }
1261
1262 void
1263 xsetsel(char *str, Time t)
1264 {
1265 free(sel.primary);
1266 sel.primary = str;
1267
1268 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
1269 if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
1270 selclear(0);
1271 }
1272
1273 void
1274 brelease(XEvent *e)
1275 {
1276 if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1277 mousereport(e);
1278 return;
1279 }
1280
1281 if (e->xbutton.button == Button2) {
1282 selpaste(NULL);
1283 } else if (e->xbutton.button == Button1) {
1284 if (sel.mode == SEL_READY) {
1285 getbuttoninfo(e);
1286 selcopy(e->xbutton.time);
1287 } else
1288 selclear(NULL);
1289 sel.mode = SEL_IDLE;
1290 tsetdirt(sel.nb.y, sel.ne.y);
1291 }
1292 }
1293
1294 void
1295 bmotion(XEvent *e)
1296 {
1297 int oldey, oldex, oldsby, oldsey;
1298
1299 if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1300 mousereport(e);
1301 return;
1302 }
1303
1304 if (!sel.mode)
1305 return;
1306
1307 sel.mode = SEL_READY;
1308 oldey = sel.oe.y;
1309 oldex = sel.oe.x;
1310 oldsby = sel.nb.y;
1311 oldsey = sel.ne.y;
1312 getbuttoninfo(e);
1313
1314 if (oldey != sel.oe.y || oldex != sel.oe.x)
1315 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1316 }
1317
1318 void
1319 die(const char *errstr, ...)
1320 {
1321 va_list ap;
1322
1323 va_start(ap, errstr);
1324 vfprintf(stderr, errstr, ap);
1325 va_end(ap);
1326 exit(1);
1327 }
1328
1329 void
1330 execsh(void)
1331 {
1332 char **args, *sh, *prog;
1333 const struct passwd *pw;
1334 char buf[sizeof(long) * 8 + 1];
1335
1336 errno = 0;
1337 if ((pw = getpwuid(getuid())) == NULL) {
1338 if (errno)
1339 die("getpwuid:%s\n", strerror(errno));
1340 else
1341 die("who are you?\n");
1342 }
1343
1344 if ((sh = getenv("SHELL")) == NULL)
1345 sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
1346
1347 if (opt_cmd)
1348 prog = opt_cmd[0];
1349 else if (utmp)
1350 prog = utmp;
1351 else
1352 prog = sh;
1353 args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
1354
1355 snprintf(buf, sizeof(buf), "%lu", xw.win);
1356
1357 unsetenv("COLUMNS");
1358 unsetenv("LINES");
1359 unsetenv("TERMCAP");
1360 setenv("LOGNAME", pw->pw_name, 1);
1361 setenv("USER", pw->pw_name, 1);
1362 setenv("SHELL", sh, 1);
1363 setenv("HOME", pw->pw_dir, 1);
1364 setenv("TERM", termname, 1);
1365 setenv("WINDOWID", buf, 1);
1366
1367 signal(SIGCHLD, SIG_DFL);
1368 signal(SIGHUP, SIG_DFL);
1369 signal(SIGINT, SIG_DFL);
1370 signal(SIGQUIT, SIG_DFL);
1371 signal(SIGTERM, SIG_DFL);
1372 signal(SIGALRM, SIG_DFL);
1373
1374 execvp(prog, args);
1375 _exit(1);
1376 }
1377
1378 void
1379 sigchld(int a)
1380 {
1381 int stat;
1382 pid_t p;
1383
1384 if ((p = waitpid(pid, &stat, WNOHANG)) < 0)
1385 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1386
1387 if (pid != p)
1388 return;
1389
1390 if (!WIFEXITED(stat) || WEXITSTATUS(stat))
1391 die("child finished with error '%d'\n", stat);
1392 exit(0);
1393 }
1394
1395
1396 void
1397 stty(void)
1398 {
1399 char cmd[_POSIX_ARG_MAX], **p, *q, *s;
1400 size_t n, siz;
1401
1402 if ((n = strlen(stty_args)) > sizeof(cmd)-1)
1403 die("incorrect stty parameters\n");
1404 memcpy(cmd, stty_args, n);
1405 q = cmd + n;
1406 siz = sizeof(cmd) - n;
1407 for (p = opt_cmd; p && (s = *p); ++p) {
1408 if ((n = strlen(s)) > siz-1)
1409 die("stty parameter length too long\n");
1410 *q++ = ' ';
1411 memcpy(q, s, n);
1412 q += n;
1413 siz -= n + 1;
1414 }
1415 *q = '\0';
1416 if (system(cmd) != 0)
1417 perror("Couldn't call stty");
1418 }
1419
1420 void
1421 ttynew(void)
1422 {
1423 int m, s;
1424 struct winsize w = {term.row, term.col, 0, 0};
1425
1426 if (opt_io) {
1427 term.mode |= MODE_PRINT;
1428 iofd = (!strcmp(opt_io, "-")) ?
1429 1 : open(opt_io, O_WRONLY | O_CREAT, 0666);
1430 if (iofd < 0) {
1431 fprintf(stderr, "Error opening %s:%s\n",
1432 opt_io, strerror(errno));
1433 }
1434 }
1435
1436 if (opt_line) {
1437 if ((cmdfd = open(opt_line, O_RDWR)) < 0)
1438 die("open line failed: %s\n", strerror(errno));
1439 dup2(cmdfd, 0);
1440 stty();
1441 return;
1442 }
1443
1444 /* seems to work fine on linux, openbsd and freebsd */
1445 if (openpty(&m, &s, NULL, NULL, &w) < 0)
1446 die("openpty failed: %s\n", strerror(errno));
1447
1448 switch (pid = fork()) {
1449 case -1:
1450 die("fork failed\n");
1451 break;
1452 case 0:
1453 close(iofd);
1454 setsid(); /* create a new process group */
1455 dup2(s, 0);
1456 dup2(s, 1);
1457 dup2(s, 2);
1458 if (ioctl(s, TIOCSCTTY, NULL) < 0)
1459 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1460 close(s);
1461 close(m);
1462 execsh();
1463 break;
1464 default:
1465 close(s);
1466 cmdfd = m;
1467 signal(SIGCHLD, sigchld);
1468 break;
1469 }
1470 }
1471
1472 size_t
1473 ttyread(void)
1474 {
1475 static char buf[BUFSIZ];
1476 static int buflen = 0;
1477 char *ptr;
1478 int charsize; /* size of utf8 char in bytes */
1479 Rune unicodep;
1480 int ret;
1481
1482 /* append read bytes to unprocessed bytes */
1483 if ((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1484 die("Couldn't read from shell: %s\n", strerror(errno));
1485
1486 buflen += ret;
1487 ptr = buf;
1488
1489 for (;;) {
1490 if (IS_SET(MODE_UTF8) && !IS_SET(MODE_SIXEL)) {
1491 /* process a complete utf8 char */
1492 charsize = utf8decode(ptr, &unicodep, buflen);
1493 if (charsize == 0)
1494 break;
1495 tputc(unicodep);
1496 ptr += charsize;
1497 buflen -= charsize;
1498
1499 } else {
1500 if (buflen <= 0)
1501 break;
1502 tputc(*ptr++ & 0xFF);
1503 buflen--;
1504 }
1505 }
1506 /* keep any uncomplete utf8 char for the next call */
1507 if (buflen > 0)
1508 memmove(buf, ptr, buflen);
1509
1510 return ret;
1511 }
1512
1513 void
1514 ttywrite(const char *s, size_t n)
1515 {
1516 fd_set wfd, rfd;
1517 ssize_t r;
1518 size_t lim = 256;
1519
1520 /*
1521 * Remember that we are using a pty, which might be a modem line.
1522 * Writing too much will clog the line. That's why we are doing this
1523 * dance.
1524 * FIXME: Migrate the world to Plan 9.
1525 */
1526 while (n > 0) {
1527 FD_ZERO(&wfd);
1528 FD_ZERO(&rfd);
1529 FD_SET(cmdfd, &wfd);
1530 FD_SET(cmdfd, &rfd);
1531
1532 /* Check if we can write. */
1533 if (pselect(cmdfd+1, &rfd, &wfd, NULL, NULL, NULL) < 0) {
1534 if (errno == EINTR)
1535 continue;
1536 die("select failed: %s\n", strerror(errno));
1537 }
1538 if (FD_ISSET(cmdfd, &wfd)) {
1539 /*
1540 * Only write the bytes written by ttywrite() or the
1541 * default of 256. This seems to be a reasonable value
1542 * for a serial line. Bigger values might clog the I/O.
1543 */
1544 if ((r = write(cmdfd, s, (n < lim)? n : lim)) < 0)
1545 goto write_error;
1546 if (r < n) {
1547 /*
1548 * We weren't able to write out everything.
1549 * This means the buffer is getting full
1550 * again. Empty it.
1551 */
1552 if (n < lim)
1553 lim = ttyread();
1554 n -= r;
1555 s += r;
1556 } else {
1557 /* All bytes have been written. */
1558 break;
1559 }
1560 }
1561 if (FD_ISSET(cmdfd, &rfd))
1562 lim = ttyread();
1563 }
1564 return;
1565
1566 write_error:
1567 die("write error on tty: %s\n", strerror(errno));
1568 }
1569
1570 void
1571 ttysend(char *s, size_t n)
1572 {
1573 int len;
1574 char *t, *lim;
1575 Rune u;
1576
1577 ttywrite(s, n);
1578 if (!IS_SET(MODE_ECHO))
1579 return;
1580
1581 lim = &s[n];
1582 for (t = s; t < lim; t += len) {
1583 if (IS_SET(MODE_UTF8) && !IS_SET(MODE_SIXEL)) {
1584 len = utf8decode(t, &u, n);
1585 } else {
1586 u = *t & 0xFF;
1587 len = 1;
1588 }
1589 if (len <= 0)
1590 break;
1591 techo(u);
1592 n -= len;
1593 }
1594 }
1595
1596 void
1597 ttyresize(void)
1598 {
1599 struct winsize w;
1600
1601 w.ws_row = term.row;
1602 w.ws_col = term.col;
1603 w.ws_xpixel = xw.tw;
1604 w.ws_ypixel = xw.th;
1605 if (ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1606 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1607 }
1608
1609 int
1610 tattrset(int attr)
1611 {
1612 int i, j;
1613
1614 for (i = 0; i < term.row-1; i++) {
1615 for (j = 0; j < term.col-1; j++) {
1616 if (term.line[i][j].mode & attr)
1617 return 1;
1618 }
1619 }
1620
1621 return 0;
1622 }
1623
1624 void
1625 tsetdirt(int top, int bot)
1626 {
1627 int i;
1628
1629 LIMIT(top, 0, term.row-1);
1630 LIMIT(bot, 0, term.row-1);
1631
1632 for (i = top; i <= bot; i++)
1633 term.dirty[i] = 1;
1634 }
1635
1636 void
1637 tsetdirtattr(int attr)
1638 {
1639 int i, j;
1640
1641 for (i = 0; i < term.row-1; i++) {
1642 for (j = 0; j < term.col-1; j++) {
1643 if (term.line[i][j].mode & attr) {
1644 tsetdirt(i, i);
1645 break;
1646 }
1647 }
1648 }
1649 }
1650
1651 void
1652 tfulldirt(void)
1653 {
1654 tsetdirt(0, term.row-1);
1655 }
1656
1657 void
1658 tcursor(int mode)
1659 {
1660 static TCursor c[2];
1661 int alt = IS_SET(MODE_ALTSCREEN);
1662
1663 if (mode == CURSOR_SAVE) {
1664 c[alt] = term.c;
1665 } else if (mode == CURSOR_LOAD) {
1666 term.c = c[alt];
1667 tmoveto(c[alt].x, c[alt].y);
1668 }
1669 }
1670
1671 void
1672 treset(void)
1673 {
1674 uint i;
1675
1676 term.c = (TCursor){{
1677 .mode = ATTR_NULL,
1678 .fg = defaultfg,
1679 .bg = defaultbg
1680 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1681
1682 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1683 for (i = tabspaces; i < term.col; i += tabspaces)
1684 term.tabs[i] = 1;
1685 term.top = 0;
1686 term.bot = term.row - 1;
1687 term.mode = MODE_WRAP|MODE_UTF8;
1688 memset(term.trantbl, CS_USA, sizeof(term.trantbl));
1689 term.charset = 0;
1690
1691 for (i = 0; i < 2; i++) {
1692 tmoveto(0, 0);
1693 tcursor(CURSOR_SAVE);
1694 tclearregion(0, 0, term.col-1, term.row-1);
1695 tswapscreen();
1696 }
1697 }
1698
1699 void
1700 tnew(int col, int row)
1701 {
1702 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1703 tresize(col, row);
1704 term.numlock = 1;
1705
1706 treset();
1707 }
1708
1709 void
1710 tswapscreen(void)
1711 {
1712 Line *tmp = term.line;
1713
1714 term.line = term.alt;
1715 term.alt = tmp;
1716 term.mode ^= MODE_ALTSCREEN;
1717 tfulldirt();
1718 }
1719
1720 void
1721 tscrolldown(int orig, int n)
1722 {
1723 int i;
1724 Line temp;
1725
1726 LIMIT(n, 0, term.bot-orig+1);
1727
1728 tsetdirt(orig, term.bot-n);
1729 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1730
1731 for (i = term.bot; i >= orig+n; i--) {
1732 temp = term.line[i];
1733 term.line[i] = term.line[i-n];
1734 term.line[i-n] = temp;
1735 }
1736
1737 selscroll(orig, n);
1738 }
1739
1740 void
1741 tscrollup(int orig, int n)
1742 {
1743 int i;
1744 Line temp;
1745
1746 LIMIT(n, 0, term.bot-orig+1);
1747
1748 tclearregion(0, orig, term.col-1, orig+n-1);
1749 tsetdirt(orig+n, term.bot);
1750
1751 for (i = orig; i <= term.bot-n; i++) {
1752 temp = term.line[i];
1753 term.line[i] = term.line[i+n];
1754 term.line[i+n] = temp;
1755 }
1756
1757 selscroll(orig, -n);
1758 }
1759
1760 void
1761 selscroll(int orig, int n)
1762 {
1763 if (sel.ob.x == -1)
1764 return;
1765
1766 if (BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1767 if ((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1768 selclear(NULL);
1769 return;
1770 }
1771 if (sel.type == SEL_RECTANGULAR) {
1772 if (sel.ob.y < term.top)
1773 sel.ob.y = term.top;
1774 if (sel.oe.y > term.bot)
1775 sel.oe.y = term.bot;
1776 } else {
1777 if (sel.ob.y < term.top) {
1778 sel.ob.y = term.top;
1779 sel.ob.x = 0;
1780 }
1781 if (sel.oe.y > term.bot) {
1782 sel.oe.y = term.bot;
1783 sel.oe.x = term.col;
1784 }
1785 }
1786 selnormalize();
1787 }
1788 }
1789
1790 void
1791 tnewline(int first_col)
1792 {
1793 int y = term.c.y;
1794
1795 if (y == term.bot) {
1796 tscrollup(term.top, 1);
1797 } else {
1798 y++;
1799 }
1800 tmoveto(first_col ? 0 : term.c.x, y);
1801 }
1802
1803 void
1804 csiparse(void)
1805 {
1806 char *p = csiescseq.buf, *np;
1807 long int v;
1808
1809 csiescseq.narg = 0;
1810 if (*p == '?') {
1811 csiescseq.priv = 1;
1812 p++;
1813 }
1814
1815 csiescseq.buf[csiescseq.len] = '\0';
1816 while (p < csiescseq.buf+csiescseq.len) {
1817 np = NULL;
1818 v = strtol(p, &np, 10);
1819 if (np == p)
1820 v = 0;
1821 if (v == LONG_MAX || v == LONG_MIN)
1822 v = -1;
1823 csiescseq.arg[csiescseq.narg++] = v;
1824 p = np;
1825 if (*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1826 break;
1827 p++;
1828 }
1829 csiescseq.mode[0] = *p++;
1830 csiescseq.mode[1] = (p < csiescseq.buf+csiescseq.len) ? *p : '\0';
1831 }
1832
1833 /* for absolute user moves, when decom is set */
1834 void
1835 tmoveato(int x, int y)
1836 {
1837 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1838 }
1839
1840 void
1841 tmoveto(int x, int y)
1842 {
1843 int miny, maxy;
1844
1845 if (term.c.state & CURSOR_ORIGIN) {
1846 miny = term.top;
1847 maxy = term.bot;
1848 } else {
1849 miny = 0;
1850 maxy = term.row - 1;
1851 }
1852 term.c.state &= ~CURSOR_WRAPNEXT;
1853 term.c.x = LIMIT(x, 0, term.col-1);
1854 term.c.y = LIMIT(y, miny, maxy);
1855 }
1856
1857 void
1858 tsetchar(Rune u, Glyph *attr, int x, int y)
1859 {
1860 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1861 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1862 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1863 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1864 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1865 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1866 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1867 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1868 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1869 };
1870
1871 /*
1872 * The table is proudly stolen from rxvt.
1873 */
1874 if (term.trantbl[term.charset] == CS_GRAPHIC0 &&
1875 BETWEEN(u, 0x41, 0x7e) && vt100_0[u - 0x41])
1876 utf8decode(vt100_0[u - 0x41], &u, UTF_SIZ);
1877
1878 if (term.line[y][x].mode & ATTR_WIDE) {
1879 if (x+1 < term.col) {
1880 term.line[y][x+1].u = ' ';
1881 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1882 }
1883 } else if (term.line[y][x].mode & ATTR_WDUMMY) {
1884 term.line[y][x-1].u = ' ';
1885 term.line[y][x-1].mode &= ~ATTR_WIDE;
1886 }
1887
1888 term.dirty[y] = 1;
1889 term.line[y][x] = *attr;
1890 term.line[y][x].u = u;
1891 }
1892
1893 void
1894 tclearregion(int x1, int y1, int x2, int y2)
1895 {
1896 int x, y, temp;
1897 Glyph *gp;
1898
1899 if (x1 > x2)
1900 temp = x1, x1 = x2, x2 = temp;
1901 if (y1 > y2)
1902 temp = y1, y1 = y2, y2 = temp;
1903
1904 LIMIT(x1, 0, term.col-1);
1905 LIMIT(x2, 0, term.col-1);
1906 LIMIT(y1, 0, term.row-1);
1907 LIMIT(y2, 0, term.row-1);
1908
1909 for (y = y1; y <= y2; y++) {
1910 term.dirty[y] = 1;
1911 for (x = x1; x <= x2; x++) {
1912 gp = &term.line[y][x];
1913 if (selected(x, y))
1914 selclear(NULL);
1915 gp->fg = term.c.attr.fg;
1916 gp->bg = term.c.attr.bg;
1917 gp->mode = 0;
1918 gp->u = ' ';
1919 }
1920 }
1921 }
1922
1923 void
1924 tdeletechar(int n)
1925 {
1926 int dst, src, size;
1927 Glyph *line;
1928
1929 LIMIT(n, 0, term.col - term.c.x);
1930
1931 dst = term.c.x;
1932 src = term.c.x + n;
1933 size = term.col - src;
1934 line = term.line[term.c.y];
1935
1936 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1937 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1938 }
1939
1940 void
1941 tinsertblank(int n)
1942 {
1943 int dst, src, size;
1944 Glyph *line;
1945
1946 LIMIT(n, 0, term.col - term.c.x);
1947
1948 dst = term.c.x + n;
1949 src = term.c.x;
1950 size = term.col - dst;
1951 line = term.line[term.c.y];
1952
1953 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1954 tclearregion(src, term.c.y, dst - 1, term.c.y);
1955 }
1956
1957 void
1958 tinsertblankline(int n)
1959 {
1960 if (BETWEEN(term.c.y, term.top, term.bot))
1961 tscrolldown(term.c.y, n);
1962 }
1963
1964 void
1965 tdeleteline(int n)
1966 {
1967 if (BETWEEN(term.c.y, term.top, term.bot))
1968 tscrollup(term.c.y, n);
1969 }
1970
1971 int32_t
1972 tdefcolor(int *attr, int *npar, int l)
1973 {
1974 int32_t idx = -1;
1975 uint r, g, b;
1976
1977 switch (attr[*npar + 1]) {
1978 case 2: /* direct color in RGB space */
1979 if (*npar + 4 >= l) {
1980 fprintf(stderr,
1981 "erresc(38): Incorrect number of parameters (%d)\n",
1982 *npar);
1983 break;
1984 }
1985 r = attr[*npar + 2];
1986 g = attr[*npar + 3];
1987 b = attr[*npar + 4];
1988 *npar += 4;
1989 if (!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1990 fprintf(stderr, "erresc: bad rgb color (%u,%u,%u)\n",
1991 r, g, b);
1992 else
1993 idx = TRUECOLOR(r, g, b);
1994 break;
1995 case 5: /* indexed color */
1996 if (*npar + 2 >= l) {
1997 fprintf(stderr,
1998 "erresc(38): Incorrect number of parameters (%d)\n",
1999 *npar);
2000 break;
2001 }
2002 *npar += 2;
2003 if (!BETWEEN(attr[*npar], 0, 255))
2004 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
2005 else
2006 idx = attr[*npar];
2007 break;
2008 case 0: /* implemented defined (only foreground) */
2009 case 1: /* transparent */
2010 case 3: /* direct color in CMY space */
2011 case 4: /* direct color in CMYK space */
2012 default:
2013 fprintf(stderr,
2014 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
2015 break;
2016 }
2017
2018 return idx;
2019 }
2020
2021 void
2022 tsetattr(int *attr, int l)
2023 {
2024 int i;
2025 int32_t idx;
2026
2027 for (i = 0; i < l; i++) {
2028 switch (attr[i]) {
2029 case 0:
2030 term.c.attr.mode &= ~(
2031 ATTR_BOLD |
2032 ATTR_FAINT |
2033 ATTR_ITALIC |
2034 ATTR_UNDERLINE |
2035 ATTR_BLINK |
2036 ATTR_REVERSE |
2037 ATTR_INVISIBLE |
2038 ATTR_STRUCK );
2039 term.c.attr.fg = defaultfg;
2040 term.c.attr.bg = defaultbg;
2041 break;
2042 case 1:
2043 term.c.attr.mode |= ATTR_BOLD;
2044 break;
2045 case 2:
2046 term.c.attr.mode |= ATTR_FAINT;
2047 break;
2048 case 3:
2049 term.c.attr.mode |= ATTR_ITALIC;
2050 break;
2051 case 4:
2052 term.c.attr.mode |= ATTR_UNDERLINE;
2053 break;
2054 case 5: /* slow blink */
2055 /* FALLTHROUGH */
2056 case 6: /* rapid blink */
2057 term.c.attr.mode |= ATTR_BLINK;
2058 break;
2059 case 7:
2060 term.c.attr.mode |= ATTR_REVERSE;
2061 break;
2062 case 8:
2063 term.c.attr.mode |= ATTR_INVISIBLE;
2064 break;
2065 case 9:
2066 term.c.attr.mode |= ATTR_STRUCK;
2067 break;
2068 case 22:
2069 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
2070 break;
2071 case 23:
2072 term.c.attr.mode &= ~ATTR_ITALIC;
2073 break;
2074 case 24:
2075 term.c.attr.mode &= ~ATTR_UNDERLINE;
2076 break;
2077 case 25:
2078 term.c.attr.mode &= ~ATTR_BLINK;
2079 break;
2080 case 27:
2081 term.c.attr.mode &= ~ATTR_REVERSE;
2082 break;
2083 case 28:
2084 term.c.attr.mode &= ~ATTR_INVISIBLE;
2085 break;
2086 case 29:
2087 term.c.attr.mode &= ~ATTR_STRUCK;
2088 break;
2089 case 38:
2090 if ((idx = tdefcolor(attr, &i, l)) >= 0)
2091 term.c.attr.fg = idx;
2092 break;
2093 case 39:
2094 term.c.attr.fg = defaultfg;
2095 break;
2096 case 48:
2097 if ((idx = tdefcolor(attr, &i, l)) >= 0)
2098 term.c.attr.bg = idx;
2099 break;
2100 case 49:
2101 term.c.attr.bg = defaultbg;
2102 break;
2103 default:
2104 if (BETWEEN(attr[i], 30, 37)) {
2105 term.c.attr.fg = attr[i] - 30;
2106 } else if (BETWEEN(attr[i], 40, 47)) {
2107 term.c.attr.bg = attr[i] - 40;
2108 } else if (BETWEEN(attr[i], 90, 97)) {
2109 term.c.attr.fg = attr[i] - 90 + 8;
2110 } else if (BETWEEN(attr[i], 100, 107)) {
2111 term.c.attr.bg = attr[i] - 100 + 8;
2112 } else {
2113 fprintf(stderr,
2114 "erresc(default): gfx attr %d unknown\n",
2115 attr[i]), csidump();
2116 }
2117 break;
2118 }
2119 }
2120 }
2121
2122 void
2123 tsetscroll(int t, int b)
2124 {
2125 int temp;
2126
2127 LIMIT(t, 0, term.row-1);
2128 LIMIT(b, 0, term.row-1);
2129 if (t > b) {
2130 temp = t;
2131 t = b;
2132 b = temp;
2133 }
2134 term.top = t;
2135 term.bot = b;
2136 }
2137
2138 void
2139 tsetmode(int priv, int set, int *args, int narg)
2140 {
2141 int *lim, mode;
2142 int alt;
2143
2144 for (lim = args + narg; args < lim; ++args) {
2145 if (priv) {
2146 switch (*args) {
2147 case 1: /* DECCKM -- Cursor key */
2148 MODBIT(term.mode, set, MODE_APPCURSOR);
2149 break;
2150 case 5: /* DECSCNM -- Reverse video */
2151 mode = term.mode;
2152 MODBIT(term.mode, set, MODE_REVERSE);
2153 if (mode != term.mode)
2154 redraw();
2155 break;
2156 case 6: /* DECOM -- Origin */
2157 MODBIT(term.c.state, set, CURSOR_ORIGIN);
2158 tmoveato(0, 0);
2159 break;
2160 case 7: /* DECAWM -- Auto wrap */
2161 MODBIT(term.mode, set, MODE_WRAP);
2162 break;
2163 case 0: /* Error (IGNORED) */
2164 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
2165 case 3: /* DECCOLM -- Column (IGNORED) */
2166 case 4: /* DECSCLM -- Scroll (IGNORED) */
2167 case 8: /* DECARM -- Auto repeat (IGNORED) */
2168 case 18: /* DECPFF -- Printer feed (IGNORED) */
2169 case 19: /* DECPEX -- Printer extent (IGNORED) */
2170 case 42: /* DECNRCM -- National characters (IGNORED) */
2171 case 12: /* att610 -- Start blinking cursor (IGNORED) */
2172 break;
2173 case 25: /* DECTCEM -- Text Cursor Enable Mode */
2174 MODBIT(term.mode, !set, MODE_HIDE);
2175 break;
2176 case 9: /* X10 mouse compatibility mode */
2177 xsetpointermotion(0);
2178 MODBIT(term.mode, 0, MODE_MOUSE);
2179 MODBIT(term.mode, set, MODE_MOUSEX10);
2180 break;
2181 case 1000: /* 1000: report button press */
2182 xsetpointermotion(0);
2183 MODBIT(term.mode, 0, MODE_MOUSE);
2184 MODBIT(term.mode, set, MODE_MOUSEBTN);
2185 break;
2186 case 1002: /* 1002: report motion on button press */
2187 xsetpointermotion(0);
2188 MODBIT(term.mode, 0, MODE_MOUSE);
2189 MODBIT(term.mode, set, MODE_MOUSEMOTION);
2190 break;
2191 case 1003: /* 1003: enable all mouse motions */
2192 xsetpointermotion(set);
2193 MODBIT(term.mode, 0, MODE_MOUSE);
2194 MODBIT(term.mode, set, MODE_MOUSEMANY);
2195 break;
2196 case 1004: /* 1004: send focus events to tty */
2197 MODBIT(term.mode, set, MODE_FOCUS);
2198 break;
2199 case 1006: /* 1006: extended reporting mode */
2200 MODBIT(term.mode, set, MODE_MOUSESGR);
2201 break;
2202 case 1034:
2203 MODBIT(term.mode, set, MODE_8BIT);
2204 break;
2205 case 1049: /* swap screen & set/restore cursor as xterm */
2206 if (!allowaltscreen)
2207 break;
2208 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
2209 /* FALLTHROUGH */
2210 case 47: /* swap screen */
2211 case 1047:
2212 if (!allowaltscreen)
2213 break;
2214 alt = IS_SET(MODE_ALTSCREEN);
2215 if (alt) {
2216 tclearregion(0, 0, term.col-1,
2217 term.row-1);
2218 }
2219 if (set ^ alt) /* set is always 1 or 0 */
2220 tswapscreen();
2221 if (*args != 1049)
2222 break;
2223 /* FALLTHROUGH */
2224 case 1048:
2225 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
2226 break;
2227 case 2004: /* 2004: bracketed paste mode */
2228 MODBIT(term.mode, set, MODE_BRCKTPASTE);
2229 break;
2230 /* Not implemented mouse modes. See comments there. */
2231 case 1001: /* mouse highlight mode; can hang the
2232 terminal by design when implemented. */
2233 case 1005: /* UTF-8 mouse mode; will confuse
2234 applications not supporting UTF-8
2235 and luit. */
2236 case 1015: /* urxvt mangled mouse mode; incompatible
2237 and can be mistaken for other control
2238 codes. */
2239 default:
2240 fprintf(stderr,
2241 "erresc: unknown private set/reset mode %d\n",
2242 *args);
2243 break;
2244 }
2245 } else {
2246 switch (*args) {
2247 case 0: /* Error (IGNORED) */
2248 break;
2249 case 2: /* KAM -- keyboard action */
2250 MODBIT(term.mode, set, MODE_KBDLOCK);
2251 break;
2252 case 4: /* IRM -- Insertion-replacement */
2253 MODBIT(term.mode, set, MODE_INSERT);
2254 break;
2255 case 12: /* SRM -- Send/Receive */
2256 MODBIT(term.mode, !set, MODE_ECHO);
2257 break;
2258 case 20: /* LNM -- Linefeed/new line */
2259 MODBIT(term.mode, set, MODE_CRLF);
2260 break;
2261 default:
2262 fprintf(stderr,
2263 "erresc: unknown set/reset mode %d\n",
2264 *args);
2265 break;
2266 }
2267 }
2268 }
2269 }
2270
2271 void
2272 csihandle(void)
2273 {
2274 char buf[40];
2275 int len;
2276
2277 switch (csiescseq.mode[0]) {
2278 default:
2279 unknown:
2280 fprintf(stderr, "erresc: unknown csi ");
2281 csidump();
2282 /* die(""); */
2283 break;
2284 case '@': /* ICH -- Insert <n> blank char */
2285 DEFAULT(csiescseq.arg[0], 1);
2286 tinsertblank(csiescseq.arg[0]);
2287 break;
2288 case 'A': /* CUU -- Cursor <n> Up */
2289 DEFAULT(csiescseq.arg[0], 1);
2290 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
2291 break;
2292 case 'B': /* CUD -- Cursor <n> Down */
2293 case 'e': /* VPR --Cursor <n> Down */
2294 DEFAULT(csiescseq.arg[0], 1);
2295 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
2296 break;
2297 case 'i': /* MC -- Media Copy */
2298 switch (csiescseq.arg[0]) {
2299 case 0:
2300 tdump();
2301 break;
2302 case 1:
2303 tdumpline(term.c.y);
2304 break;
2305 case 2:
2306 tdumpsel();
2307 break;
2308 case 4:
2309 term.mode &= ~MODE_PRINT;
2310 break;
2311 case 5:
2312 term.mode |= MODE_PRINT;
2313 break;
2314 }
2315 break;
2316 case 'c': /* DA -- Device Attributes */
2317 if (csiescseq.arg[0] == 0)
2318 ttywrite(vtiden, sizeof(vtiden) - 1);
2319 break;
2320 case 'C': /* CUF -- Cursor <n> Forward */
2321 case 'a': /* HPR -- Cursor <n> Forward */
2322 DEFAULT(csiescseq.arg[0], 1);
2323 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
2324 break;
2325 case 'D': /* CUB -- Cursor <n> Backward */
2326 DEFAULT(csiescseq.arg[0], 1);
2327 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
2328 break;
2329 case 'E': /* CNL -- Cursor <n> Down and first col */
2330 DEFAULT(csiescseq.arg[0], 1);
2331 tmoveto(0, term.c.y+csiescseq.arg[0]);
2332 break;
2333 case 'F': /* CPL -- Cursor <n> Up and first col */
2334 DEFAULT(csiescseq.arg[0], 1);
2335 tmoveto(0, term.c.y-csiescseq.arg[0]);
2336 break;
2337 case 'g': /* TBC -- Tabulation clear */
2338 switch (csiescseq.arg[0]) {
2339 case 0: /* clear current tab stop */
2340 term.tabs[term.c.x] = 0;
2341 break;
2342 case 3: /* clear all the tabs */
2343 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2344 break;
2345 default:
2346 goto unknown;
2347 }
2348 break;
2349 case 'G': /* CHA -- Move to <col> */
2350 case '`': /* HPA */
2351 DEFAULT(csiescseq.arg[0], 1);
2352 tmoveto(csiescseq.arg[0]-1, term.c.y);
2353 break;
2354 case 'H': /* CUP -- Move to <row> <col> */
2355 case 'f': /* HVP */
2356 DEFAULT(csiescseq.arg[0], 1);
2357 DEFAULT(csiescseq.arg[1], 1);
2358 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2359 break;
2360 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2361 DEFAULT(csiescseq.arg[0], 1);
2362 tputtab(csiescseq.arg[0]);
2363 break;
2364 case 'J': /* ED -- Clear screen */
2365 selclear(NULL);
2366 switch (csiescseq.arg[0]) {
2367 case 0: /* below */
2368 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2369 if (term.c.y < term.row-1) {
2370 tclearregion(0, term.c.y+1, term.col-1,
2371 term.row-1);
2372 }
2373 break;
2374 case 1: /* above */
2375 if (term.c.y > 1)
2376 tclearregion(0, 0, term.col-1, term.c.y-1);
2377 tclearregion(0, term.c.y, term.c.x, term.c.y);
2378 break;
2379 case 2: /* all */
2380 tclearregion(0, 0, term.col-1, term.row-1);
2381 break;
2382 default:
2383 goto unknown;
2384 }
2385 break;
2386 case 'K': /* EL -- Clear line */
2387 switch (csiescseq.arg[0]) {
2388 case 0: /* right */
2389 tclearregion(term.c.x, term.c.y, term.col-1,
2390 term.c.y);
2391 break;
2392 case 1: /* left */
2393 tclearregion(0, term.c.y, term.c.x, term.c.y);
2394 break;
2395 case 2: /* all */
2396 tclearregion(0, term.c.y, term.col-1, term.c.y);
2397 break;
2398 }
2399 break;
2400 case 'S': /* SU -- Scroll <n> line up */
2401 DEFAULT(csiescseq.arg[0], 1);
2402 tscrollup(term.top, csiescseq.arg[0]);
2403 break;
2404 case 'T': /* SD -- Scroll <n> line down */
2405 DEFAULT(csiescseq.arg[0], 1);
2406 tscrolldown(term.top, csiescseq.arg[0]);
2407 break;
2408 case 'L': /* IL -- Insert <n> blank lines */
2409 DEFAULT(csiescseq.arg[0], 1);
2410 tinsertblankline(csiescseq.arg[0]);
2411 break;
2412 case 'l': /* RM -- Reset Mode */
2413 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2414 break;
2415 case 'M': /* DL -- Delete <n> lines */
2416 DEFAULT(csiescseq.arg[0], 1);
2417 tdeleteline(csiescseq.arg[0]);
2418 break;
2419 case 'X': /* ECH -- Erase <n> char */
2420 DEFAULT(csiescseq.arg[0], 1);
2421 tclearregion(term.c.x, term.c.y,
2422 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2423 break;
2424 case 'P': /* DCH -- Delete <n> char */
2425 DEFAULT(csiescseq.arg[0], 1);
2426 tdeletechar(csiescseq.arg[0]);
2427 break;
2428 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2429 DEFAULT(csiescseq.arg[0], 1);
2430 tputtab(-csiescseq.arg[0]);
2431 break;
2432 case 'd': /* VPA -- Move to <row> */
2433 DEFAULT(csiescseq.arg[0], 1);
2434 tmoveato(term.c.x, csiescseq.arg[0]-1);
2435 break;
2436 case 'h': /* SM -- Set terminal mode */
2437 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2438 break;
2439 case 'm': /* SGR -- Terminal attribute (color) */
2440 tsetattr(csiescseq.arg, csiescseq.narg);
2441 break;
2442 case 'n': /* DSR – Device Status Report (cursor position) */
2443 if (csiescseq.arg[0] == 6) {
2444 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2445 term.c.y+1, term.c.x+1);
2446 ttywrite(buf, len);
2447 }
2448 break;
2449 case 'r': /* DECSTBM -- Set Scrolling Region */
2450 if (csiescseq.priv) {
2451 goto unknown;
2452 } else {
2453 DEFAULT(csiescseq.arg[0], 1);
2454 DEFAULT(csiescseq.arg[1], term.row);
2455 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2456 tmoveato(0, 0);
2457 }
2458 break;
2459 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2460 tcursor(CURSOR_SAVE);
2461 break;
2462 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2463 tcursor(CURSOR_LOAD);
2464 break;
2465 case ' ':
2466 switch (csiescseq.mode[1]) {
2467 case 'q': /* DECSCUSR -- Set Cursor Style */
2468 DEFAULT(csiescseq.arg[0], 1);
2469 if (!BETWEEN(csiescseq.arg[0], 0, 6)) {
2470 goto unknown;
2471 }
2472 xw.cursor = csiescseq.arg[0];
2473 break;
2474 default:
2475 goto unknown;
2476 }
2477 break;
2478 }
2479 }
2480
2481 void
2482 csidump(void)
2483 {
2484 int i;
2485 uint c;
2486
2487 printf("ESC[");
2488 for (i = 0; i < csiescseq.len; i++) {
2489 c = csiescseq.buf[i] & 0xff;
2490 if (isprint(c)) {
2491 putchar(c);
2492 } else if (c == '\n') {
2493 printf("(\\n)");
2494 } else if (c == '\r') {
2495 printf("(\\r)");
2496 } else if (c == 0x1b) {
2497 printf("(\\e)");
2498 } else {
2499 printf("(%02x)", c);
2500 }
2501 }
2502 putchar('\n');
2503 }
2504
2505 void
2506 csireset(void)
2507 {
2508 memset(&csiescseq, 0, sizeof(csiescseq));
2509 }
2510
2511 void
2512 strhandle(void)
2513 {
2514 char *p = NULL;
2515 int j, narg, par;
2516
2517 term.esc &= ~(ESC_STR_END|ESC_STR);
2518 strparse();
2519 par = (narg = strescseq.narg) ? atoi(strescseq.args[0]) : 0;
2520
2521 switch (strescseq.type) {
2522 case ']': /* OSC -- Operating System Command */
2523 switch (par) {
2524 case 0:
2525 case 1:
2526 case 2:
2527 if (narg > 1)
2528 xsettitle(strescseq.args[1]);
2529 return;
2530 case 4: /* color set */
2531 if (narg < 3)
2532 break;
2533 p = strescseq.args[2];
2534 /* FALLTHROUGH */
2535 case 104: /* color reset, here p = NULL */
2536 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2537 if (xsetcolorname(j, p)) {
2538 fprintf(stderr, "erresc: invalid color %s\n", p);
2539 } else {
2540 /*
2541 * TODO if defaultbg color is changed, borders
2542 * are dirty
2543 */
2544 redraw();
2545 }
2546 return;
2547 }
2548 break;
2549 case 'k': /* old title set compatibility */
2550 xsettitle(strescseq.args[0]);
2551 return;
2552 case 'P': /* DCS -- Device Control String */
2553 term.mode |= ESC_DCS;
2554 case '_': /* APC -- Application Program Command */
2555 case '^': /* PM -- Privacy Message */
2556 return;
2557 }
2558
2559 fprintf(stderr, "erresc: unknown str ");
2560 strdump();
2561 }
2562
2563 void
2564 strparse(void)
2565 {
2566 int c;
2567 char *p = strescseq.buf;
2568
2569 strescseq.narg = 0;
2570 strescseq.buf[strescseq.len] = '\0';
2571
2572 if (*p == '\0')
2573 return;
2574
2575 while (strescseq.narg < STR_ARG_SIZ) {
2576 strescseq.args[strescseq.narg++] = p;
2577 while ((c = *p) != ';' && c != '\0')
2578 ++p;
2579 if (c == '\0')
2580 return;
2581 *p++ = '\0';
2582 }
2583 }
2584
2585 void
2586 strdump(void)
2587 {
2588 int i;
2589 uint c;
2590
2591 printf("ESC%c", strescseq.type);
2592 for (i = 0; i < strescseq.len; i++) {
2593 c = strescseq.buf[i] & 0xff;
2594 if (c == '\0') {
2595 return;
2596 } else if (isprint(c)) {
2597 putchar(c);
2598 } else if (c == '\n') {
2599 printf("(\\n)");
2600 } else if (c == '\r') {
2601 printf("(\\r)");
2602 } else if (c == 0x1b) {
2603 printf("(\\e)");
2604 } else {
2605 printf("(%02x)", c);
2606 }
2607 }
2608 printf("ESC\\\n");
2609 }
2610
2611 void
2612 strreset(void)
2613 {
2614 memset(&strescseq, 0, sizeof(strescseq));
2615 }
2616
2617 void
2618 sendbreak(const Arg *arg)
2619 {
2620 if (tcsendbreak(cmdfd, 0))
2621 perror("Error sending break");
2622 }
2623
2624 void
2625 tprinter(char *s, size_t len)
2626 {
2627 if (iofd != -1 && xwrite(iofd, s, len) < 0) {
2628 fprintf(stderr, "Error writing in %s:%s\n",
2629 opt_io, strerror(errno));
2630 close(iofd);
2631 iofd = -1;
2632 }
2633 }
2634
2635 void
2636 toggleprinter(const Arg *arg)
2637 {
2638 term.mode ^= MODE_PRINT;
2639 }
2640
2641 void
2642 printscreen(const Arg *arg)
2643 {
2644 tdump();
2645 }
2646
2647 void
2648 printsel(const Arg *arg)
2649 {
2650 tdumpsel();
2651 }
2652
2653 void
2654 tdumpsel(void)
2655 {
2656 char *ptr;
2657
2658 if ((ptr = getsel())) {
2659 tprinter(ptr, strlen(ptr));
2660 free(ptr);
2661 }
2662 }
2663
2664 void
2665 tdumpline(int n)
2666 {
2667 char buf[UTF_SIZ];
2668 Glyph *bp, *end;
2669
2670 bp = &term.line[n][0];
2671 end = &bp[MIN(tlinelen(n), term.col) - 1];
2672 if (bp != end || bp->u != ' ') {
2673 for ( ;bp <= end; ++bp)
2674 tprinter(buf, utf8encode(bp->u, buf));
2675 }
2676 tprinter("\n", 1);
2677 }
2678
2679 void
2680 tdump(void)
2681 {
2682 int i;
2683
2684 for (i = 0; i < term.row; ++i)
2685 tdumpline(i);
2686 }
2687
2688 void
2689 tputtab(int n)
2690 {
2691 uint x = term.c.x;
2692
2693 if (n > 0) {
2694 while (x < term.col && n--)
2695 for (++x; x < term.col && !term.tabs[x]; ++x)
2696 /* nothing */ ;
2697 } else if (n < 0) {
2698 while (x > 0 && n++)
2699 for (--x; x > 0 && !term.tabs[x]; --x)
2700 /* nothing */ ;
2701 }
2702 term.c.x = LIMIT(x, 0, term.col-1);
2703 }
2704
2705 void
2706 techo(Rune u)
2707 {
2708 if (ISCONTROL(u)) { /* control code */
2709 if (u & 0x80) {
2710 u &= 0x7f;
2711 tputc('^');
2712 tputc('[');
2713 } else if (u != '\n' && u != '\r' && u != '\t') {
2714 u ^= 0x40;
2715 tputc('^');
2716 }
2717 }
2718 tputc(u);
2719 }
2720
2721 void
2722 tdefutf8(char ascii)
2723 {
2724 if (ascii == 'G')
2725 term.mode |= MODE_UTF8;
2726 else if (ascii == '@')
2727 term.mode &= ~MODE_UTF8;
2728 }
2729
2730 void
2731 tdeftran(char ascii)
2732 {
2733 static char cs[] = "0B";
2734 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2735 char *p;
2736
2737 if ((p = strchr(cs, ascii)) == NULL) {
2738 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2739 } else {
2740 term.trantbl[term.icharset] = vcs[p - cs];
2741 }
2742 }
2743
2744 void
2745 tdectest(char c)
2746 {
2747 int x, y;
2748
2749 if (c == '8') { /* DEC screen alignment test. */
2750 for (x = 0; x < term.col; ++x) {
2751 for (y = 0; y < term.row; ++y)
2752 tsetchar('E', &term.c.attr, x, y);
2753 }
2754 }
2755 }
2756
2757 void
2758 tstrsequence(uchar c)
2759 {
2760 strreset();
2761
2762 switch (c) {
2763 case 0x90: /* DCS -- Device Control String */
2764 c = 'P';
2765 term.esc |= ESC_DCS;
2766 break;
2767 case 0x9f: /* APC -- Application Program Command */
2768 c = '_';
2769 break;
2770 case 0x9e: /* PM -- Privacy Message */
2771 c = '^';
2772 break;
2773 case 0x9d: /* OSC -- Operating System Command */
2774 c = ']';
2775 break;
2776 }
2777 strescseq.type = c;
2778 term.esc |= ESC_STR;
2779 }
2780
2781 void
2782 tcontrolcode(uchar ascii)
2783 {
2784 switch (ascii) {
2785 case '\t': /* HT */
2786 tputtab(1);
2787 return;
2788 case '\b': /* BS */
2789 tmoveto(term.c.x-1, term.c.y);
2790 return;
2791 case '\r': /* CR */
2792 tmoveto(0, term.c.y);
2793 return;
2794 case '\f': /* LF */
2795 case '\v': /* VT */
2796 case '\n': /* LF */
2797 /* go to first col if the mode is set */
2798 tnewline(IS_SET(MODE_CRLF));
2799 return;
2800 case '\a': /* BEL */
2801 if (term.esc & ESC_STR_END) {
2802 /* backwards compatibility to xterm */
2803 strhandle();
2804 } else {
2805 if (!(xw.state & WIN_FOCUSED))
2806 xseturgency(1);
2807 if (bellvolume)
2808 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
2809 }
2810 break;
2811 case '\033': /* ESC */
2812 csireset();
2813 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2814 term.esc |= ESC_START;
2815 return;
2816 case '\016': /* SO (LS1 -- Locking shift 1) */
2817 case '\017': /* SI (LS0 -- Locking shift 0) */
2818 term.charset = 1 - (ascii - '\016');
2819 return;
2820 case '\032': /* SUB */
2821 tsetchar('?', &term.c.attr, term.c.x, term.c.y);
2822 case '\030': /* CAN */
2823 csireset();
2824 break;
2825 case '\005': /* ENQ (IGNORED) */
2826 case '\000': /* NUL (IGNORED) */
2827 case '\021': /* XON (IGNORED) */
2828 case '\023': /* XOFF (IGNORED) */
2829 case 0177: /* DEL (IGNORED) */
2830 return;
2831 case 0x80: /* TODO: PAD */
2832 case 0x81: /* TODO: HOP */
2833 case 0x82: /* TODO: BPH */
2834 case 0x83: /* TODO: NBH */
2835 case 0x84: /* TODO: IND */
2836 break;
2837 case 0x85: /* NEL -- Next line */
2838 tnewline(1); /* always go to first col */
2839 break;
2840 case 0x86: /* TODO: SSA */
2841 case 0x87: /* TODO: ESA */
2842 break;
2843 case 0x88: /* HTS -- Horizontal tab stop */
2844 term.tabs[term.c.x] = 1;
2845 break;
2846 case 0x89: /* TODO: HTJ */
2847 case 0x8a: /* TODO: VTS */
2848 case 0x8b: /* TODO: PLD */
2849 case 0x8c: /* TODO: PLU */
2850 case 0x8d: /* TODO: RI */
2851 case 0x8e: /* TODO: SS2 */
2852 case 0x8f: /* TODO: SS3 */
2853 case 0x91: /* TODO: PU1 */
2854 case 0x92: /* TODO: PU2 */
2855 case 0x93: /* TODO: STS */
2856 case 0x94: /* TODO: CCH */
2857 case 0x95: /* TODO: MW */
2858 case 0x96: /* TODO: SPA */
2859 case 0x97: /* TODO: EPA */
2860 case 0x98: /* TODO: SOS */
2861 case 0x99: /* TODO: SGCI */
2862 break;
2863 case 0x9a: /* DECID -- Identify Terminal */
2864 ttywrite(vtiden, sizeof(vtiden) - 1);
2865 break;
2866 case 0x9b: /* TODO: CSI */
2867 case 0x9c: /* TODO: ST */
2868 break;
2869 case 0x90: /* DCS -- Device Control String */
2870 case 0x9d: /* OSC -- Operating System Command */
2871 case 0x9e: /* PM -- Privacy Message */
2872 case 0x9f: /* APC -- Application Program Command */
2873 tstrsequence(ascii);
2874 return;
2875 }
2876 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2877 term.esc &= ~(ESC_STR_END|ESC_STR);
2878 }
2879
2880 /*
2881 * returns 1 when the sequence is finished and it hasn't to read
2882 * more characters for this sequence, otherwise 0
2883 */
2884 int
2885 eschandle(uchar ascii)
2886 {
2887 switch (ascii) {
2888 case '[':
2889 term.esc |= ESC_CSI;
2890 return 0;
2891 case '#':
2892 term.esc |= ESC_TEST;
2893 return 0;
2894 case '%':
2895 term.esc |= ESC_UTF8;
2896 return 0;
2897 case 'P': /* DCS -- Device Control String */
2898 case '_': /* APC -- Application Program Command */
2899 case '^': /* PM -- Privacy Message */
2900 case ']': /* OSC -- Operating System Command */
2901 case 'k': /* old title set compatibility */
2902 tstrsequence(ascii);
2903 return 0;
2904 case 'n': /* LS2 -- Locking shift 2 */
2905 case 'o': /* LS3 -- Locking shift 3 */
2906 term.charset = 2 + (ascii - 'n');
2907 break;
2908 case '(': /* GZD4 -- set primary charset G0 */
2909 case ')': /* G1D4 -- set secondary charset G1 */
2910 case '*': /* G2D4 -- set tertiary charset G2 */
2911 case '+': /* G3D4 -- set quaternary charset G3 */
2912 term.icharset = ascii - '(';
2913 term.esc |= ESC_ALTCHARSET;
2914 return 0;
2915 case 'D': /* IND -- Linefeed */
2916 if (term.c.y == term.bot) {
2917 tscrollup(term.top, 1);
2918 } else {
2919 tmoveto(term.c.x, term.c.y+1);
2920 }
2921 break;
2922 case 'E': /* NEL -- Next line */
2923 tnewline(1); /* always go to first col */
2924 break;
2925 case 'H': /* HTS -- Horizontal tab stop */
2926 term.tabs[term.c.x] = 1;
2927 break;
2928 case 'M': /* RI -- Reverse index */
2929 if (term.c.y == term.top) {
2930 tscrolldown(term.top, 1);
2931 } else {
2932 tmoveto(term.c.x, term.c.y-1);
2933 }
2934 break;
2935 case 'Z': /* DECID -- Identify Terminal */
2936 ttywrite(vtiden, sizeof(vtiden) - 1);
2937 break;
2938 case 'c': /* RIS -- Reset to inital state */
2939 treset();
2940 xresettitle();
2941 xloadcols();
2942 break;
2943 case '=': /* DECPAM -- Application keypad */
2944 term.mode |= MODE_APPKEYPAD;
2945 break;
2946 case '>': /* DECPNM -- Normal keypad */
2947 term.mode &= ~MODE_APPKEYPAD;
2948 break;
2949 case '7': /* DECSC -- Save Cursor */
2950 tcursor(CURSOR_SAVE);
2951 break;
2952 case '8': /* DECRC -- Restore Cursor */
2953 tcursor(CURSOR_LOAD);
2954 break;
2955 case '\\': /* ST -- String Terminator */
2956 if (term.esc & ESC_STR_END)
2957 strhandle();
2958 break;
2959 default:
2960 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2961 (uchar) ascii, isprint(ascii)? ascii:'.');
2962 break;
2963 }
2964 return 1;
2965 }
2966
2967 void
2968 tputc(Rune u)
2969 {
2970 char c[UTF_SIZ];
2971 int control;
2972 int width, len;
2973 Glyph *gp;
2974
2975 control = ISCONTROL(u);
2976 if (!IS_SET(MODE_UTF8) && !IS_SET(MODE_SIXEL)) {
2977 c[0] = u;
2978 width = len = 1;
2979 } else {
2980 len = utf8encode(u, c);
2981 if (!control && (width = wcwidth(u)) == -1) {
2982 memcpy(c, "\357\277\275", 4); /* UTF_INVALID */
2983 width = 1;
2984 }
2985 }
2986
2987 if (IS_SET(MODE_PRINT))
2988 tprinter(c, len);
2989
2990 /*
2991 * STR sequence must be checked before anything else
2992 * because it uses all following characters until it
2993 * receives a ESC, a SUB, a ST or any other C1 control
2994 * character.
2995 */
2996 if (term.esc & ESC_STR) {
2997 if (u == '\a' || u == 030 || u == 032 || u == 033 ||
2998 ISCONTROLC1(u)) {
2999 term.esc &= ~(ESC_START|ESC_STR|ESC_DCS);
3000 if (IS_SET(MODE_SIXEL)) {
3001 /* TODO: render sixel */;
3002 term.mode &= ~MODE_SIXEL;
3003 return;
3004 }
3005 term.esc |= ESC_STR_END;
3006 goto check_control_code;
3007 }
3008
3009
3010 if (IS_SET(MODE_SIXEL)) {
3011 /* TODO: implement sixel mode */
3012 return;
3013 }
3014 if (term.esc&ESC_DCS && strescseq.len == 0 && u == 'q')
3015 term.mode |= MODE_SIXEL;
3016
3017 if (strescseq.len+len >= sizeof(strescseq.buf)-1) {
3018 /*
3019 * Here is a bug in terminals. If the user never sends
3020 * some code to stop the str or esc command, then st
3021 * will stop responding. But this is better than
3022 * silently failing with unknown characters. At least
3023 * then users will report back.
3024 *
3025 * In the case users ever get fixed, here is the code:
3026 */
3027 /*
3028 * term.esc = 0;
3029 * strhandle();
3030 */
3031 return;
3032 }
3033
3034 memmove(&strescseq.buf[strescseq.len], c, len);
3035 strescseq.len += len;
3036 return;
3037 }
3038
3039 check_control_code:
3040 /*
3041 * Actions of control codes must be performed as soon they arrive
3042 * because they can be embedded inside a control sequence, and
3043 * they must not cause conflicts with sequences.
3044 */
3045 if (control) {
3046 tcontrolcode(u);
3047 /*
3048 * control codes are not shown ever
3049 */
3050 return;
3051 } else if (term.esc & ESC_START) {
3052 if (term.esc & ESC_CSI) {
3053 csiescseq.buf[csiescseq.len++] = u;
3054 if (BETWEEN(u, 0x40, 0x7E)
3055 || csiescseq.len >= \
3056 sizeof(csiescseq.buf)-1) {
3057 term.esc = 0;
3058 csiparse();
3059 csihandle();
3060 }
3061 return;
3062 } else if (term.esc & ESC_UTF8) {
3063 tdefutf8(u);
3064 } else if (term.esc & ESC_ALTCHARSET) {
3065 tdeftran(u);
3066 } else if (term.esc & ESC_TEST) {
3067 tdectest(u);
3068 } else {
3069 if (!eschandle(u))
3070 return;
3071 /* sequence already finished */
3072 }
3073 term.esc = 0;
3074 /*
3075 * All characters which form part of a sequence are not
3076 * printed
3077 */
3078 return;
3079 }
3080 if (sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
3081 selclear(NULL);
3082
3083 gp = &term.line[term.c.y][term.c.x];
3084 if (IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
3085 gp->mode |= ATTR_WRAP;
3086 tnewline(1);
3087 gp = &term.line[term.c.y][term.c.x];
3088 }
3089
3090 if (IS_SET(MODE_INSERT) && term.c.x+width < term.col)
3091 memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
3092
3093 if (term.c.x+width > term.col) {
3094 tnewline(1);
3095 gp = &term.line[term.c.y][term.c.x];
3096 }
3097
3098 tsetchar(u, &term.c.attr, term.c.x, term.c.y);
3099
3100 if (width == 2) {
3101 gp->mode |= ATTR_WIDE;
3102 if (term.c.x+1 < term.col) {
3103 gp[1].u = '\0';
3104 gp[1].mode = ATTR_WDUMMY;
3105 }
3106 }
3107 if (term.c.x+width < term.col) {
3108 tmoveto(term.c.x+width, term.c.y);
3109 } else {
3110 term.c.state |= CURSOR_WRAPNEXT;
3111 }
3112 }
3113
3114 void
3115 tresize(int col, int row)
3116 {
3117 int i;
3118 int minrow = MIN(row, term.row);
3119 int mincol = MIN(col, term.col);
3120 int *bp;
3121 TCursor c;
3122
3123 if (col < 1 || row < 1) {
3124 fprintf(stderr,
3125 "tresize: error resizing to %dx%d\n", col, row);
3126 return;
3127 }
3128
3129 /*
3130 * slide screen to keep cursor where we expect it -
3131 * tscrollup would work here, but we can optimize to
3132 * memmove because we're freeing the earlier lines
3133 */
3134 for (i = 0; i <= term.c.y - row; i++) {
3135 free(term.line[i]);
3136 free(term.alt[i]);
3137 }
3138 /* ensure that both src and dst are not NULL */
3139 if (i > 0) {
3140 memmove(term.line, term.line + i, row * sizeof(Line));
3141 memmove(term.alt, term.alt + i, row * sizeof(Line));
3142 }
3143 for (i += row; i < term.row; i++) {
3144 free(term.line[i]);
3145 free(term.alt[i]);
3146 }
3147
3148 /* resize to new width */
3149 term.specbuf = xrealloc(term.specbuf, col * sizeof(XftGlyphFontSpec));
3150
3151 /* resize to new height */
3152 term.line = xrealloc(term.line, row * sizeof(Line));
3153 term.alt = xrealloc(term.alt, row * sizeof(Line));
3154 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
3155 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
3156
3157 /* resize each row to new width, zero-pad if needed */
3158 for (i = 0; i < minrow; i++) {
3159 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
3160 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
3161 }
3162
3163 /* allocate any new rows */
3164 for (/* i == minrow */; i < row; i++) {
3165 term.line[i] = xmalloc(col * sizeof(Glyph));
3166 term.alt[i] = xmalloc(col * sizeof(Glyph));
3167 }
3168 if (col > term.col) {
3169 bp = term.tabs + term.col;
3170
3171 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
3172 while (--bp > term.tabs && !*bp)
3173 /* nothing */ ;
3174 for (bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
3175 *bp = 1;
3176 }
3177 /* update terminal size */
3178 term.col = col;
3179 term.row = row;
3180 /* reset scrolling region */
3181 tsetscroll(0, row-1);
3182 /* make use of the LIMIT in tmoveto */
3183 tmoveto(term.c.x, term.c.y);
3184 /* Clearing both screens (it makes dirty all lines) */
3185 c = term.c;
3186 for (i = 0; i < 2; i++) {
3187 if (mincol < col && 0 < minrow) {
3188 tclearregion(mincol, 0, col - 1, minrow - 1);
3189 }
3190 if (0 < col && minrow < row) {
3191 tclearregion(0, minrow, col - 1, row - 1);
3192 }
3193 tswapscreen();
3194 tcursor(CURSOR_LOAD);
3195 }
3196 term.c = c;
3197 }
3198
3199 void
3200 xresize(int col, int row)
3201 {
3202 xw.tw = MAX(1, col * xw.cw);
3203 xw.th = MAX(1, row * xw.ch);
3204
3205 XFreePixmap(xw.dpy, xw.buf);
3206 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3207 DefaultDepth(xw.dpy, xw.scr));
3208 XftDrawChange(xw.draw, xw.buf);
3209 xclear(0, 0, xw.w, xw.h);
3210 }
3211
3212 ushort
3213 sixd_to_16bit(int x)
3214 {
3215 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
3216 }
3217
3218 int
3219 xloadcolor(int i, const char *name, Color *ncolor)
3220 {
3221 XRenderColor color = { .alpha = 0xffff };
3222
3223 if (!name) {
3224 if (BETWEEN(i, 16, 255)) { /* 256 color */
3225 if (i < 6*6*6+16) { /* same colors as xterm */
3226 color.red = sixd_to_16bit( ((i-16)/36)%6 );
3227 color.green = sixd_to_16bit( ((i-16)/6) %6 );
3228 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
3229 } else { /* greyscale */
3230 color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
3231 color.green = color.blue = color.red;
3232 }
3233 return XftColorAllocValue(xw.dpy, xw.vis,
3234 xw.cmap, &color, ncolor);
3235 } else
3236 name = colorname[i];
3237 }
3238
3239 return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
3240 }
3241
3242 void
3243 xloadcols(void)
3244 {
3245 int i;
3246 static int loaded;
3247 Color *cp;
3248
3249 if (loaded) {
3250 for (cp = dc.col; cp < &dc.col[LEN(dc.col)]; ++cp)
3251 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
3252 }
3253
3254 for (i = 0; i < LEN(dc.col); i++)
3255 if (!xloadcolor(i, NULL, &dc.col[i])) {
3256 if (colorname[i])
3257 die("Could not allocate color '%s'\n", colorname[i]);
3258 else
3259 die("Could not allocate color %d\n", i);
3260 }
3261 loaded = 1;
3262 }
3263
3264 int
3265 xsetcolorname(int x, const char *name)
3266 {
3267 Color ncolor;
3268
3269 if (!BETWEEN(x, 0, LEN(dc.col)))
3270 return 1;
3271
3272
3273 if (!xloadcolor(x, name, &ncolor))
3274 return 1;
3275
3276 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
3277 dc.col[x] = ncolor;
3278
3279 return 0;
3280 }
3281
3282 /*
3283 * Absolute coordinates.
3284 */
3285 void
3286 xclear(int x1, int y1, int x2, int y2)
3287 {
3288 XftDrawRect(xw.draw,
3289 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
3290 x1, y1, x2-x1, y2-y1);
3291 }
3292
3293 void
3294 xhints(void)
3295 {
3296 XClassHint class = {opt_name ? opt_name : termname,
3297 opt_class ? opt_class : termname};
3298 XWMHints wm = {.flags = InputHint, .input = 1};
3299 XSizeHints *sizeh = NULL;
3300
3301 sizeh = XAllocSizeHints();
3302
3303 sizeh->flags = PSize | PResizeInc | PBaseSize;
3304 sizeh->height = xw.h;
3305 sizeh->width = xw.w;
3306 sizeh->height_inc = xw.ch;
3307 sizeh->width_inc = xw.cw;
3308 sizeh->base_height = 2 * borderpx;
3309 sizeh->base_width = 2 * borderpx;
3310 if (xw.isfixed) {
3311 sizeh->flags |= PMaxSize | PMinSize;
3312 sizeh->min_width = sizeh->max_width = xw.w;
3313 sizeh->min_height = sizeh->max_height = xw.h;
3314 }
3315 if (xw.gm & (XValue|YValue)) {
3316 sizeh->flags |= USPosition | PWinGravity;
3317 sizeh->x = xw.l;
3318 sizeh->y = xw.t;
3319 sizeh->win_gravity = xgeommasktogravity(xw.gm);
3320 }
3321
3322 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
3323 &class);
3324 XFree(sizeh);
3325 }
3326
3327 int
3328 xgeommasktogravity(int mask)
3329 {
3330 switch (mask & (XNegative|YNegative)) {
3331 case 0:
3332 return NorthWestGravity;
3333 case XNegative:
3334 return NorthEastGravity;
3335 case YNegative:
3336 return SouthWestGravity;
3337 }
3338
3339 return SouthEastGravity;
3340 }
3341
3342 int
3343 xloadfont(Font *f, FcPattern *pattern)
3344 {
3345 FcPattern *match;
3346 FcResult result;
3347 XGlyphInfo extents;
3348
3349 match = XftFontMatch(xw.dpy, xw.scr, pattern, &result);
3350 if (!match)
3351 return 1;
3352
3353 if (!(f->match = XftFontOpenPattern(xw.dpy, match))) {
3354 FcPatternDestroy(match);
3355 return 1;
3356 }
3357
3358 XftTextExtentsUtf8(xw.dpy, f->match,
3359 (const FcChar8 *) ascii_printable,
3360 strlen(ascii_printable), &extents);
3361
3362 f->set = NULL;
3363 f->pattern = FcPatternDuplicate(pattern);
3364
3365 f->ascent = f->match->ascent;
3366 f->descent = f->match->descent;
3367 f->lbearing = 0;
3368 f->rbearing = f->match->max_advance_width;
3369
3370 f->height = f->ascent + f->descent;
3371 f->width = DIVCEIL(extents.xOff, strlen(ascii_printable));
3372
3373 return 0;
3374 }
3375
3376 void
3377 xloadfonts(char *fontstr, double fontsize)
3378 {
3379 FcPattern *pattern;
3380 double fontval;
3381 float ceilf(float);
3382
3383 if (fontstr[0] == '-') {
3384 pattern = XftXlfdParse(fontstr, False, False);
3385 } else {
3386 pattern = FcNameParse((FcChar8 *)fontstr);
3387 }
3388
3389 if (!pattern)
3390 die("st: can't open font %s\n", fontstr);
3391
3392 if (fontsize > 1) {
3393 FcPatternDel(pattern, FC_PIXEL_SIZE);
3394 FcPatternDel(pattern, FC_SIZE);
3395 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
3396 usedfontsize = fontsize;
3397 } else {
3398 if (FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval) ==
3399 FcResultMatch) {
3400 usedfontsize = fontval;
3401 } else if (FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval) ==
3402 FcResultMatch) {
3403 usedfontsize = -1;
3404 } else {
3405 /*
3406 * Default font size is 12, if none given. This is to
3407 * have a known usedfontsize value.
3408 */
3409 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
3410 usedfontsize = 12;
3411 }
3412 defaultfontsize = usedfontsize;
3413 }
3414
3415 if (xloadfont(&dc.font, pattern))
3416 die("st: can't open font %s\n", fontstr);
3417
3418 if (usedfontsize < 0) {
3419 FcPatternGetDouble(dc.font.match->pattern,
3420 FC_PIXEL_SIZE, 0, &fontval);
3421 usedfontsize = fontval;
3422 if (fontsize == 0)
3423 defaultfontsize = fontval;
3424 }
3425
3426 /* Setting character width and height. */
3427 xw.cw = ceilf(dc.font.width * cwscale);
3428 xw.ch = ceilf(dc.font.height * chscale);
3429
3430 FcPatternDel(pattern, FC_SLANT);
3431 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3432 if (xloadfont(&dc.ifont, pattern))
3433 die("st: can't open font %s\n", fontstr);
3434
3435 FcPatternDel(pattern, FC_WEIGHT);
3436 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3437 if (xloadfont(&dc.ibfont, pattern))
3438 die("st: can't open font %s\n", fontstr);
3439
3440 FcPatternDel(pattern, FC_SLANT);
3441 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3442 if (xloadfont(&dc.bfont, pattern))
3443 die("st: can't open font %s\n", fontstr);
3444
3445 FcPatternDestroy(pattern);
3446 }
3447
3448 void
3449 xunloadfont(Font *f)
3450 {
3451 XftFontClose(xw.dpy, f->match);
3452 FcPatternDestroy(f->pattern);
3453 if (f->set)
3454 FcFontSetDestroy(f->set);
3455 }
3456
3457 void
3458 xunloadfonts(void)
3459 {
3460 /* Free the loaded fonts in the font cache. */
3461 while (frclen > 0)
3462 XftFontClose(xw.dpy, frc[--frclen].font);
3463
3464 xunloadfont(&dc.font);
3465 xunloadfont(&dc.bfont);
3466 xunloadfont(&dc.ifont);
3467 xunloadfont(&dc.ibfont);
3468 }
3469
3470 void
3471 xzoom(const Arg *arg)
3472 {
3473 Arg larg;
3474
3475 larg.f = usedfontsize + arg->f;
3476 xzoomabs(&larg);
3477 }
3478
3479 void
3480 xzoomabs(const Arg *arg)
3481 {
3482 xunloadfonts();
3483 xloadfonts(usedfont, arg->f);
3484 cresize(0, 0);
3485 ttyresize();
3486 redraw();
3487 xhints();
3488 }
3489
3490 void
3491 xzoomreset(const Arg *arg)
3492 {
3493 Arg larg;
3494
3495 if (defaultfontsize > 0) {
3496 larg.f = defaultfontsize;
3497 xzoomabs(&larg);
3498 }
3499 }
3500
3501 void
3502 xinit(void)
3503 {
3504 XGCValues gcvalues;
3505 Cursor cursor;
3506 Window parent;
3507 pid_t thispid = getpid();
3508 XColor xmousefg, xmousebg;
3509
3510 if (!(xw.dpy = XOpenDisplay(NULL)))
3511 die("Can't open display\n");
3512 xw.scr = XDefaultScreen(xw.dpy);
3513 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3514
3515 /* font */
3516 if (!FcInit())
3517 die("Could not init fontconfig.\n");
3518
3519 usedfont = (opt_font == NULL)? font : opt_font;
3520 xloadfonts(usedfont, 0);
3521
3522 /* colors */
3523 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3524 xloadcols();
3525
3526 /* adjust fixed window geometry */
3527 xw.w = 2 * borderpx + term.col * xw.cw;
3528 xw.h = 2 * borderpx + term.row * xw.ch;
3529 if (xw.gm & XNegative)
3530 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3531 if (xw.gm & YNegative)
3532 xw.t += DisplayHeight(xw.dpy, xw.scr) - xw.h - 2;
3533
3534 /* Events */
3535 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3536 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3537 xw.attrs.bit_gravity = NorthWestGravity;
3538 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3539 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3540 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3541 xw.attrs.colormap = xw.cmap;
3542
3543 if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
3544 parent = XRootWindow(xw.dpy, xw.scr);
3545 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3546 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3547 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3548 | CWEventMask | CWColormap, &xw.attrs);
3549
3550 memset(&gcvalues, 0, sizeof(gcvalues));
3551 gcvalues.graphics_exposures = False;
3552 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3553 &gcvalues);
3554 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3555 DefaultDepth(xw.dpy, xw.scr));
3556 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3557 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3558
3559 /* Xft rendering context */
3560 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3561
3562 /* input methods */
3563 if ((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3564 XSetLocaleModifiers("@im=local");
3565 if ((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3566 XSetLocaleModifiers("@im=");
3567 if ((xw.xim = XOpenIM(xw.dpy,
3568 NULL, NULL, NULL)) == NULL) {
3569 die("XOpenIM failed. Could not open input"
3570 " device.\n");
3571 }
3572 }
3573 }
3574 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3575 | XIMStatusNothing, XNClientWindow, xw.win,
3576 XNFocusWindow, xw.win, NULL);
3577 if (xw.xic == NULL)
3578 die("XCreateIC failed. Could not obtain input method.\n");
3579
3580 /* white cursor, black outline */
3581 cursor = XCreateFontCursor(xw.dpy, mouseshape);
3582 XDefineCursor(xw.dpy, xw.win, cursor);
3583
3584 if (XParseColor(xw.dpy, xw.cmap, colorname[mousefg], &xmousefg) == 0) {
3585 xmousefg.red = 0xffff;
3586 xmousefg.green = 0xffff;
3587 xmousefg.blue = 0xffff;
3588 }
3589
3590 if (XParseColor(xw.dpy, xw.cmap, colorname[mousebg], &xmousebg) == 0) {
3591 xmousebg.red = 0x0000;
3592 xmousebg.green = 0x0000;
3593 xmousebg.blue = 0x0000;
3594 }
3595
3596 XRecolorCursor(xw.dpy, cursor, &xmousefg, &xmousebg);
3597
3598 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3599 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3600 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3601 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3602
3603 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3604 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3605 PropModeReplace, (uchar *)&thispid, 1);
3606
3607 xresettitle();
3608 XMapWindow(xw.dpy, xw.win);
3609 xhints();
3610 XSync(xw.dpy, False);
3611 }
3612
3613 int
3614 xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x, int y)
3615 {
3616 float winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch, xp, yp;
3617 ushort mode, prevmode = USHRT_MAX;
3618 Font *font = &dc.font;
3619 int frcflags = FRC_NORMAL;
3620 float runewidth = xw.cw;
3621 Rune rune;
3622 FT_UInt glyphidx;
3623 FcResult fcres;
3624 FcPattern *fcpattern, *fontpattern;
3625 FcFontSet *fcsets[] = { NULL };
3626 FcCharSet *fccharset;
3627 int i, f, numspecs = 0;
3628
3629 for (i = 0, xp = winx, yp = winy + font->ascent; i < len; ++i) {
3630 /* Fetch rune and mode for current glyph. */
3631 rune = glyphs[i].u;
3632 mode = glyphs[i].mode;
3633
3634 /* Skip dummy wide-character spacing. */
3635 if (mode == ATTR_WDUMMY)
3636 continue;
3637
3638 /* Determine font for glyph if different from previous glyph. */
3639 if (prevmode != mode) {
3640 prevmode = mode;
3641 font = &dc.font;
3642 frcflags = FRC_NORMAL;
3643 runewidth = xw.cw * ((mode & ATTR_WIDE) ? 2.0f : 1.0f);
3644 if ((mode & ATTR_ITALIC) && (mode & ATTR_BOLD)) {
3645 font = &dc.ibfont;
3646 frcflags = FRC_ITALICBOLD;
3647 } else if (mode & ATTR_ITALIC) {
3648 font = &dc.ifont;
3649 frcflags = FRC_ITALIC;
3650 } else if (mode & ATTR_BOLD) {
3651 font = &dc.bfont;
3652 frcflags = FRC_BOLD;
3653 }
3654 yp = winy + font->ascent;
3655 }
3656
3657 /* Lookup character index with default font. */
3658 glyphidx = XftCharIndex(xw.dpy, font->match, rune);
3659 if (glyphidx) {
3660 specs[numspecs].font = font->match;
3661 specs[numspecs].glyph = glyphidx;
3662 specs[numspecs].x = (short)xp;
3663 specs[numspecs].y = (short)yp;
3664 xp += runewidth;
3665 numspecs++;
3666 continue;
3667 }
3668
3669 /* Fallback on font cache, search the font cache for match. */
3670 for (f = 0; f < frclen; f++) {
3671 glyphidx = XftCharIndex(xw.dpy, frc[f].font, rune);
3672 /* Everything correct. */
3673 if (glyphidx && frc[f].flags == frcflags)
3674 break;
3675 /* We got a default font for a not found glyph. */
3676 if (!glyphidx && frc[f].flags == frcflags
3677 && frc[f].unicodep == rune) {
3678 break;
3679 }
3680 }
3681
3682 /* Nothing was found. Use fontconfig to find matching font. */
3683 if (f >= frclen) {
3684 if (!font->set)
3685 font->set = FcFontSort(0, font->pattern,
3686 1, 0, &fcres);
3687 fcsets[0] = font->set;
3688
3689 /*
3690 * Nothing was found in the cache. Now use
3691 * some dozen of Fontconfig calls to get the
3692 * font for one single character.
3693 *
3694 * Xft and fontconfig are design failures.
3695 */
3696 fcpattern = FcPatternDuplicate(font->pattern);
3697 fccharset = FcCharSetCreate();
3698
3699 FcCharSetAddChar(fccharset, rune);
3700 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3701 fccharset);
3702 FcPatternAddBool(fcpattern, FC_SCALABLE, 1);
3703
3704 FcConfigSubstitute(0, fcpattern,
3705 FcMatchPattern);
3706 FcDefaultSubstitute(fcpattern);
3707
3708 fontpattern = FcFontSetMatch(0, fcsets, 1,
3709 fcpattern, &fcres);
3710
3711 /*
3712 * Overwrite or create the new cache entry.
3713 */
3714 if (frclen >= LEN(frc)) {
3715 frclen = LEN(frc) - 1;
3716 XftFontClose(xw.dpy, frc[frclen].font);
3717 frc[frclen].unicodep = 0;
3718 }
3719
3720 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3721 fontpattern);
3722 frc[frclen].flags = frcflags;
3723 frc[frclen].unicodep = rune;
3724
3725 glyphidx = XftCharIndex(xw.dpy, frc[frclen].font, rune);
3726
3727 f = frclen;
3728 frclen++;
3729
3730 FcPatternDestroy(fcpattern);
3731 FcCharSetDestroy(fccharset);
3732 }
3733
3734 specs[numspecs].font = frc[f].font;
3735 specs[numspecs].glyph = glyphidx;
3736 specs[numspecs].x = (short)xp;
3737 specs[numspecs].y = (short)yp;
3738 xp += runewidth;
3739 numspecs++;
3740 }
3741
3742 return numspecs;
3743 }
3744
3745 void
3746 xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, int y)
3747 {
3748 int charlen = len * ((base.mode & ATTR_WIDE) ? 2 : 1);
3749 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3750 width = charlen * xw.cw;
3751 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3752 XRenderColor colfg, colbg;
3753 XRectangle r;
3754
3755 /* Determine foreground and background colors based on mode. */
3756 if (base.fg == defaultfg) {
3757 if (base.mode & ATTR_ITALIC)
3758 base.fg = defaultitalic;
3759 else if ((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD))
3760 base.fg = defaultitalic;
3761 else if (base.mode & ATTR_UNDERLINE)
3762 base.fg = defaultunderline;
3763 }
3764
3765 if (IS_TRUECOL(base.fg)) {
3766 colfg.alpha = 0xffff;
3767 colfg.red = TRUERED(base.fg);
3768 colfg.green = TRUEGREEN(base.fg);
3769 colfg.blue = TRUEBLUE(base.fg);
3770 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3771 fg = &truefg;
3772 } else {
3773 fg = &dc.col[base.fg];
3774 }
3775
3776 if (IS_TRUECOL(base.bg)) {
3777 colbg.alpha = 0xffff;
3778 colbg.green = TRUEGREEN(base.bg);
3779 colbg.red = TRUERED(base.bg);
3780 colbg.blue = TRUEBLUE(base.bg);
3781 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3782 bg = &truebg;
3783 } else {
3784 bg = &dc.col[base.bg];
3785 }
3786
3787 /* Change basic system colors [0-7] to bright system colors [8-15] */
3788 if ((base.mode & ATTR_BOLD_FAINT) == ATTR_BOLD && BETWEEN(base.fg, 0, 7))
3789 fg = &dc.col[base.fg + 8];
3790
3791 if (IS_SET(MODE_REVERSE)) {
3792 if (fg == &dc.col[defaultfg]) {
3793 fg = &dc.col[defaultbg];
3794 } else {
3795 colfg.red = ~fg->color.red;
3796 colfg.green = ~fg->color.green;
3797 colfg.blue = ~fg->color.blue;
3798 colfg.alpha = fg->color.alpha;
3799 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3800 &revfg);
3801 fg = &revfg;
3802 }
3803
3804 if (bg == &dc.col[defaultbg]) {
3805 bg = &dc.col[defaultfg];
3806 } else {
3807 colbg.red = ~bg->color.red;
3808 colbg.green = ~bg->color.green;
3809 colbg.blue = ~bg->color.blue;
3810 colbg.alpha = bg->color.alpha;
3811 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3812 &revbg);
3813 bg = &revbg;
3814 }
3815 }
3816
3817 if (base.mode & ATTR_REVERSE) {
3818 temp = fg;
3819 fg = bg;
3820 bg = temp;
3821 }
3822
3823 if ((base.mode & ATTR_BOLD_FAINT) == ATTR_FAINT) {
3824 colfg.red = fg->color.red / 2;
3825 colfg.green = fg->color.green / 2;
3826 colfg.blue = fg->color.blue / 2;
3827 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3828 fg = &revfg;
3829 }
3830
3831 if (base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3832 fg = bg;
3833
3834 if (base.mode & ATTR_INVISIBLE)
3835 fg = bg;
3836
3837 /* Intelligent cleaning up of the borders. */
3838 if (x == 0) {
3839 xclear(0, (y == 0)? 0 : winy, borderpx,
3840 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3841 }
3842 if (x + charlen >= term.col) {
3843 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3844 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3845 }
3846 if (y == 0)
3847 xclear(winx, 0, winx + width, borderpx);
3848 if (y == term.row-1)
3849 xclear(winx, winy + xw.ch, winx + width, xw.h);
3850
3851 /* Clean up the region we want to draw to. */
3852 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3853
3854 /* Set the clip region because Xft is sometimes dirty. */
3855 r.x = 0;
3856 r.y = 0;
3857 r.height = xw.ch;
3858 r.width = width;
3859 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3860
3861 /* Render the glyphs. */
3862 XftDrawGlyphFontSpec(xw.draw, fg, specs, len);
3863
3864 /* Render underline and strikethrough. */
3865 if (base.mode & ATTR_UNDERLINE) {
3866 XftDrawRect(xw.draw, fg, winx, winy + dc.font.ascent + 1,
3867 width, 1);
3868 }
3869
3870 if (base.mode & ATTR_STRUCK) {
3871 XftDrawRect(xw.draw, fg, winx, winy + 2 * dc.font.ascent / 3,
3872 width, 1);
3873 }
3874
3875 /* Reset clip to none. */
3876 XftDrawSetClip(xw.draw, 0);
3877 }
3878
3879 void
3880 xdrawglyph(Glyph g, int x, int y)
3881 {
3882 int numspecs;
3883 XftGlyphFontSpec spec;
3884
3885 numspecs = xmakeglyphfontspecs(&spec, &g, 1, x, y);
3886 xdrawglyphfontspecs(&spec, g, numspecs, x, y);
3887 }
3888
3889 void
3890 xdrawcursor(void)
3891 {
3892 static int oldx = 0, oldy = 0;
3893 int curx;
3894 Glyph g = {' ', ATTR_NULL, defaultbg, defaultcs}, og;
3895 int ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3896 Color drawcol;
3897
3898 LIMIT(oldx, 0, term.col-1);
3899 LIMIT(oldy, 0, term.row-1);
3900
3901 curx = term.c.x;
3902
3903 /* adjust position if in dummy */
3904 if (term.line[oldy][oldx].mode & ATTR_WDUMMY)
3905 oldx--;
3906 if (term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3907 curx--;
3908
3909 /* remove the old cursor */
3910 og = term.line[oldy][oldx];
3911 if (ena_sel && selected(oldx, oldy))
3912 og.mode ^= ATTR_REVERSE;
3913 xdrawglyph(og, oldx, oldy);
3914
3915 g.u = term.line[term.c.y][term.c.x].u;
3916
3917 /*
3918 * Select the right color for the right mode.
3919 */
3920 if (IS_SET(MODE_REVERSE)) {
3921 g.mode |= ATTR_REVERSE;
3922 g.bg = defaultfg;
3923 if (ena_sel && selected(term.c.x, term.c.y)) {
3924 drawcol = dc.col[defaultcs];
3925 g.fg = defaultrcs;
3926 } else {
3927 drawcol = dc.col[defaultrcs];
3928 g.fg = defaultcs;
3929 }
3930 } else {
3931 if (ena_sel && selected(term.c.x, term.c.y)) {
3932 drawcol = dc.col[defaultrcs];
3933 g.fg = defaultfg;
3934 g.bg = defaultrcs;
3935 } else {
3936 drawcol = dc.col[defaultcs];
3937 }
3938 }
3939
3940 if (IS_SET(MODE_HIDE))
3941 return;
3942
3943 /* draw the new one */
3944 if (xw.state & WIN_FOCUSED) {
3945 switch (xw.cursor) {
3946 case 7: /* st extension: snowman */
3947 utf8decode("☃", &g.u, UTF_SIZ);
3948 case 0: /* Blinking Block */
3949 case 1: /* Blinking Block (Default) */
3950 case 2: /* Steady Block */
3951 g.mode |= term.line[term.c.y][curx].mode & ATTR_WIDE;
3952 xdrawglyph(g, term.c.x, term.c.y);
3953 break;
3954 case 3: /* Blinking Underline */
3955 case 4: /* Steady Underline */
3956 XftDrawRect(xw.draw, &drawcol,
3957 borderpx + curx * xw.cw,
3958 borderpx + (term.c.y + 1) * xw.ch - \
3959 cursorthickness,
3960 xw.cw, cursorthickness);
3961 break;
3962 case 5: /* Blinking bar */
3963 case 6: /* Steady bar */
3964 XftDrawRect(xw.draw, &drawcol,
3965 borderpx + curx * xw.cw,
3966 borderpx + term.c.y * xw.ch,
3967 cursorthickness, xw.ch);
3968 break;
3969 }
3970 } else {
3971 XftDrawRect(xw.draw, &drawcol,
3972 borderpx + curx * xw.cw,
3973 borderpx + term.c.y * xw.ch,
3974 xw.cw - 1, 1);
3975 XftDrawRect(xw.draw, &drawcol,
3976 borderpx + curx * xw.cw,
3977 borderpx + term.c.y * xw.ch,
3978 1, xw.ch - 1);
3979 XftDrawRect(xw.draw, &drawcol,
3980 borderpx + (curx + 1) * xw.cw - 1,
3981 borderpx + term.c.y * xw.ch,
3982 1, xw.ch - 1);
3983 XftDrawRect(xw.draw, &drawcol,
3984 borderpx + curx * xw.cw,
3985 borderpx + (term.c.y + 1) * xw.ch - 1,
3986 xw.cw, 1);
3987 }
3988 oldx = curx, oldy = term.c.y;
3989 }
3990
3991
3992 void
3993 xsettitle(char *p)
3994 {
3995 XTextProperty prop;
3996
3997 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3998 &prop);
3999 XSetWMName(xw.dpy, xw.win, &prop);
4000 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
4001 XFree(prop.value);
4002 }
4003
4004 void
4005 xresettitle(void)
4006 {
4007 xsettitle(opt_title ? opt_title : "st");
4008 }
4009
4010 void
4011 redraw(void)
4012 {
4013 tfulldirt();
4014 draw();
4015 }
4016
4017 void
4018 draw(void)
4019 {
4020 drawregion(0, 0, term.col, term.row);
4021 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
4022 xw.h, 0, 0);
4023 XSetForeground(xw.dpy, dc.gc,
4024 dc.col[IS_SET(MODE_REVERSE)?
4025 defaultfg : defaultbg].pixel);
4026 }
4027
4028 void
4029 drawregion(int x1, int y1, int x2, int y2)
4030 {
4031 int i, x, y, ox, numspecs;
4032 Glyph base, new;
4033 XftGlyphFontSpec *specs;
4034 int ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
4035
4036 if (!(xw.state & WIN_VISIBLE))
4037 return;
4038
4039 for (y = y1; y < y2; y++) {
4040 if (!term.dirty[y])
4041 continue;
4042
4043 term.dirty[y] = 0;
4044
4045 specs = term.specbuf;
4046 numspecs = xmakeglyphfontspecs(specs, &term.line[y][x1], x2 - x1, x1, y);
4047
4048 i = ox = 0;
4049 for (x = x1; x < x2 && i < numspecs; x++) {
4050 new = term.line[y][x];
4051 if (new.mode == ATTR_WDUMMY)
4052 continue;
4053 if (ena_sel && selected(x, y))
4054 new.mode ^= ATTR_REVERSE;
4055 if (i > 0 && ATTRCMP(base, new)) {
4056 xdrawglyphfontspecs(specs, base, i, ox, y);
4057 specs += i;
4058 numspecs -= i;
4059 i = 0;
4060 }
4061 if (i == 0) {
4062 ox = x;
4063 base = new;
4064 }
4065 i++;
4066 }
4067 if (i > 0)
4068 xdrawglyphfontspecs(specs, base, i, ox, y);
4069 }
4070 xdrawcursor();
4071 }
4072
4073 void
4074 expose(XEvent *ev)
4075 {
4076 redraw();
4077 }
4078
4079 void
4080 visibility(XEvent *ev)
4081 {
4082 XVisibilityEvent *e = &ev->xvisibility;
4083
4084 MODBIT(xw.state, e->state != VisibilityFullyObscured, WIN_VISIBLE);
4085 }
4086
4087 void
4088 unmap(XEvent *ev)
4089 {
4090 xw.state &= ~WIN_VISIBLE;
4091 }
4092
4093 void
4094 xsetpointermotion(int set)
4095 {
4096 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
4097 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
4098 }
4099
4100 void
4101 xseturgency(int add)
4102 {
4103 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
4104
4105 MODBIT(h->flags, add, XUrgencyHint);
4106 XSetWMHints(xw.dpy, xw.win, h);
4107 XFree(h);
4108 }
4109
4110 void
4111 focus(XEvent *ev)
4112 {
4113 XFocusChangeEvent *e = &ev->xfocus;
4114
4115 if (e->mode == NotifyGrab)
4116 return;
4117
4118 if (ev->type == FocusIn) {
4119 XSetICFocus(xw.xic);
4120 xw.state |= WIN_FOCUSED;
4121 xseturgency(0);
4122 if (IS_SET(MODE_FOCUS))
4123 ttywrite("\033[I", 3);
4124 } else {
4125 XUnsetICFocus(xw.xic);
4126 xw.state &= ~WIN_FOCUSED;
4127 if (IS_SET(MODE_FOCUS))
4128 ttywrite("\033[O", 3);
4129 }
4130 }
4131
4132 int
4133 match(uint mask, uint state)
4134 {
4135 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
4136 }
4137
4138 void
4139 numlock(const Arg *dummy)
4140 {
4141 term.numlock ^= 1;
4142 }
4143
4144 char*
4145 kmap(KeySym k, uint state)
4146 {
4147 Key *kp;
4148 int i;
4149
4150 /* Check for mapped keys out of X11 function keys. */
4151 for (i = 0; i < LEN(mappedkeys); i++) {
4152 if (mappedkeys[i] == k)
4153 break;
4154 }
4155 if (i == LEN(mappedkeys)) {
4156 if ((k & 0xFFFF) < 0xFD00)
4157 return NULL;
4158 }
4159
4160 for (kp = key; kp < key + LEN(key); kp++) {
4161 if (kp->k != k)
4162 continue;
4163
4164 if (!match(kp->mask, state))
4165 continue;
4166
4167 if (IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
4168 continue;
4169 if (term.numlock && kp->appkey == 2)
4170 continue;
4171
4172 if (IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
4173 continue;
4174
4175 if (IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
4176 continue;
4177
4178 return kp->s;
4179 }
4180
4181 return NULL;
4182 }
4183
4184 void
4185 kpress(XEvent *ev)
4186 {
4187 XKeyEvent *e = &ev->xkey;
4188 KeySym ksym;
4189 char buf[32], *customkey;
4190 int len;
4191 Rune c;
4192 Status status;
4193 Shortcut *bp;
4194
4195 if (IS_SET(MODE_KBDLOCK))
4196 return;
4197
4198 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
4199 /* 1. shortcuts */
4200 for (bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
4201 if (ksym == bp->keysym && match(bp->mod, e->state)) {
4202 bp->func(&(bp->arg));
4203 return;
4204 }
4205 }
4206
4207 /* 2. custom keys from config.h */
4208 if ((customkey = kmap(ksym, e->state))) {
4209 ttysend(customkey, strlen(customkey));
4210 return;
4211 }
4212
4213 /* 3. composed string from input method */
4214 if (len == 0)
4215 return;
4216 if (len == 1 && e->state & Mod1Mask) {
4217 if (IS_SET(MODE_8BIT)) {
4218 if (*buf < 0177) {
4219 c = *buf | 0x80;
4220 len = utf8encode(c, buf);
4221 }
4222 } else {
4223 buf[1] = buf[0];
4224 buf[0] = '\033';
4225 len = 2;
4226 }
4227 }
4228 ttysend(buf, len);
4229 }
4230
4231
4232 void
4233 cmessage(XEvent *e)
4234 {
4235 /*
4236 * See xembed specs
4237 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
4238 */
4239 if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
4240 if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
4241 xw.state |= WIN_FOCUSED;
4242 xseturgency(0);
4243 } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
4244 xw.state &= ~WIN_FOCUSED;
4245 }
4246 } else if (e->xclient.data.l[0] == xw.wmdeletewin) {
4247 /* Send SIGHUP to shell */
4248 kill(pid, SIGHUP);
4249 exit(0);
4250 }
4251 }
4252
4253 void
4254 cresize(int width, int height)
4255 {
4256 int col, row;
4257
4258 if (width != 0)
4259 xw.w = width;
4260 if (height != 0)
4261 xw.h = height;
4262
4263 col = (xw.w - 2 * borderpx) / xw.cw;
4264 row = (xw.h - 2 * borderpx) / xw.ch;
4265
4266 tresize(col, row);
4267 xresize(col, row);
4268 }
4269
4270 void
4271 resize(XEvent *e)
4272 {
4273 if (e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
4274 return;
4275
4276 cresize(e->xconfigure.width, e->xconfigure.height);
4277 ttyresize();
4278 }
4279
4280 void
4281 run(void)
4282 {
4283 XEvent ev;
4284 int w = xw.w, h = xw.h;
4285 fd_set rfd;
4286 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
4287 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
4288 long deltatime;
4289
4290 /* Waiting for window mapping */
4291 do {
4292 XNextEvent(xw.dpy, &ev);
4293 /*
4294 * This XFilterEvent call is required because of XOpenIM. It
4295 * does filter out the key event and some client message for
4296 * the input method too.
4297 */
4298 if (XFilterEvent(&ev, None))
4299 continue;
4300 if (ev.type == ConfigureNotify) {
4301 w = ev.xconfigure.width;
4302 h = ev.xconfigure.height;
4303 }
4304 } while (ev.type != MapNotify);
4305
4306 cresize(w, h);
4307 ttynew();
4308 ttyresize();
4309
4310 clock_gettime(CLOCK_MONOTONIC, &last);
4311 lastblink = last;
4312
4313 for (xev = actionfps;;) {
4314 FD_ZERO(&rfd);
4315 FD_SET(cmdfd, &rfd);
4316 FD_SET(xfd, &rfd);
4317
4318 if (pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
4319 if (errno == EINTR)
4320 continue;
4321 die("select failed: %s\n", strerror(errno));
4322 }
4323 if (FD_ISSET(cmdfd, &rfd)) {
4324 ttyread();
4325 if (blinktimeout) {
4326 blinkset = tattrset(ATTR_BLINK);
4327 if (!blinkset)
4328 MODBIT(term.mode, 0, MODE_BLINK);
4329 }
4330 }
4331
4332 if (FD_ISSET(xfd, &rfd))
4333 xev = actionfps;
4334
4335 clock_gettime(CLOCK_MONOTONIC, &now);
4336 drawtimeout.tv_sec = 0;
4337 drawtimeout.tv_nsec = (1000 * 1E6)/ xfps;
4338 tv = &drawtimeout;
4339
4340 dodraw = 0;
4341 if (blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
4342 tsetdirtattr(ATTR_BLINK);
4343 term.mode ^= MODE_BLINK;
4344 lastblink = now;
4345 dodraw = 1;
4346 }
4347 deltatime = TIMEDIFF(now, last);
4348 if (deltatime > 1000 / (xev ? xfps : actionfps)) {
4349 dodraw = 1;
4350 last = now;
4351 }
4352
4353 if (dodraw) {
4354 while (XPending(xw.dpy)) {
4355 XNextEvent(xw.dpy, &ev);
4356 if (XFilterEvent(&ev, None))
4357 continue;
4358 if (handler[ev.type])
4359 (handler[ev.type])(&ev);
4360 }
4361
4362 draw();
4363 XFlush(xw.dpy);
4364
4365 if (xev && !FD_ISSET(xfd, &rfd))
4366 xev--;
4367 if (!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
4368 if (blinkset) {
4369 if (TIMEDIFF(now, lastblink) \
4370 > blinktimeout) {
4371 drawtimeout.tv_nsec = 1000;
4372 } else {
4373 drawtimeout.tv_nsec = (1E6 * \
4374 (blinktimeout - \
4375 TIMEDIFF(now,
4376 lastblink)));
4377 }
4378 drawtimeout.tv_sec = \
4379 drawtimeout.tv_nsec / 1E9;
4380 drawtimeout.tv_nsec %= (long)1E9;
4381 } else {
4382 tv = NULL;
4383 }
4384 }
4385 }
4386 }
4387 }
4388
4389 void
4390 usage(void)
4391 {
4392 die("usage: %s [-aiv] [-c class] [-f font] [-g geometry]"
4393 " [-n name] [-o file]\n"
4394 " [-T title] [-t title] [-w windowid]"
4395 " [[-e] command [args ...]]\n"
4396 " %s [-aiv] [-c class] [-f font] [-g geometry]"
4397 " [-n name] [-o file]\n"
4398 " [-T title] [-t title] [-w windowid] -l line"
4399 " [stty_args ...]\n", argv0, argv0);
4400 }
4401
4402 int
4403 main(int argc, char *argv[])
4404 {
4405 uint cols = 80, rows = 24;
4406
4407 xw.l = xw.t = 0;
4408 xw.isfixed = False;
4409 xw.cursor = cursorshape;
4410
4411 ARGBEGIN {
4412 case 'a':
4413 allowaltscreen = 0;
4414 break;
4415 case 'c':
4416 opt_class = EARGF(usage());
4417 break;
4418 case 'e':
4419 if (argc > 0)
4420 --argc, ++argv;
4421 goto run;
4422 case 'f':
4423 opt_font = EARGF(usage());
4424 break;
4425 case 'g':
4426 xw.gm = XParseGeometry(EARGF(usage()),
4427 &xw.l, &xw.t, &cols, &rows);
4428 break;
4429 case 'i':
4430 xw.isfixed = 1;
4431 break;
4432 case 'o':
4433 opt_io = EARGF(usage());
4434 break;
4435 case 'l':
4436 opt_line = EARGF(usage());
4437 break;
4438 case 'n':
4439 opt_name = EARGF(usage());
4440 break;
4441 case 't':
4442 case 'T':
4443 opt_title = EARGF(usage());
4444 break;
4445 case 'w':
4446 opt_embed = EARGF(usage());
4447 break;
4448 case 'v':
4449 die("%s " VERSION " (c) 2010-2016 st engineers\n", argv0);
4450 break;
4451 default:
4452 usage();
4453 } ARGEND;
4454
4455 run:
4456 if (argc > 0) {
4457 /* eat all remaining arguments */
4458 opt_cmd = argv;
4459 if (!opt_title && !opt_line)
4460 opt_title = basename(xstrdup(argv[0]));
4461 }
4462 setlocale(LC_CTYPE, "");
4463 XSetLocaleModifiers("");
4464 tnew(MAX(cols, 1), MAX(rows, 1));
4465 xinit();
4466 selinit();
4467 run();
4468
4469 return 0;
4470 }
4471
simple terminal