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Fixing a bug while parsing empty arguments in csiparse.
[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #define _XOPEN_SOURCE 600
3 #include <ctype.h>
4 #include <errno.h>
5 #include <fcntl.h>
6 #include <limits.h>
7 #include <locale.h>
8 #include <pwd.h>
9 #include <stdarg.h>
10 #include <stdbool.h>
11 #include <stdio.h>
12 #include <stdlib.h>
13 #include <string.h>
14 #include <signal.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <sys/stat.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <sys/wait.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <X11/Xatom.h>
24 #include <X11/Xlib.h>
25 #include <X11/Xutil.h>
26 #include <X11/cursorfont.h>
27 #include <X11/keysym.h>
28 #include <X11/Xft/Xft.h>
29 #include <fontconfig/fontconfig.h>
30
31 #define Glyph Glyph_
32 #define Font Font_
33 #define Draw XftDraw *
34 #define Colour XftColor
35 #define Colourmap Colormap
36
37 #if defined(__linux)
38 #include <pty.h>
39 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
40 #include <util.h>
41 #elif defined(__FreeBSD__) || defined(__DragonFly__)
42 #include <libutil.h>
43 #endif
44
45 #define USAGE \
46 "st " VERSION " (c) 2010-2013 st engineers\n" \
47 "usage: st [-v] [-c class] [-f font] [-g geometry] [-o file]" \
48 " [-t title] [-w windowid] [-e command ...]\n"
49
50 /* XEMBED messages */
51 #define XEMBED_FOCUS_IN 4
52 #define XEMBED_FOCUS_OUT 5
53
54 /* Arbitrary sizes */
55 #define UTF_SIZ 4
56 #define ESC_BUF_SIZ (128*UTF_SIZ)
57 #define ESC_ARG_SIZ 16
58 #define STR_BUF_SIZ ESC_BUF_SIZ
59 #define STR_ARG_SIZ ESC_ARG_SIZ
60 #define DRAW_BUF_SIZ 20*1024
61 #define XK_ANY_MOD UINT_MAX
62 #define XK_NO_MOD 0
63 #define XK_SWITCH_MOD (1<<13)
64
65 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
66
67 /* macros */
68 #define SERRNO strerror(errno)
69 #define MIN(a, b) ((a) < (b) ? (a) : (b))
70 #define MAX(a, b) ((a) < (b) ? (b) : (a))
71 #define LEN(a) (sizeof(a) / sizeof(a[0]))
72 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
73 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
74 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
75 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
76 #define IS_SET(flag) ((term.mode & (flag)) != 0)
77 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
78
79 #define VT102ID "\033[?6c"
80
81 enum glyph_attribute {
82 ATTR_NULL = 0,
83 ATTR_REVERSE = 1,
84 ATTR_UNDERLINE = 2,
85 ATTR_BOLD = 4,
86 ATTR_GFX = 8,
87 ATTR_ITALIC = 16,
88 ATTR_BLINK = 32,
89 };
90
91 enum cursor_movement {
92 CURSOR_SAVE,
93 CURSOR_LOAD
94 };
95
96 enum cursor_state {
97 CURSOR_DEFAULT = 0,
98 CURSOR_WRAPNEXT = 1,
99 CURSOR_ORIGIN = 2
100 };
101
102 enum glyph_state {
103 GLYPH_SET = 1,
104 GLYPH_DIRTY = 2
105 };
106
107 enum term_mode {
108 MODE_WRAP = 1,
109 MODE_INSERT = 2,
110 MODE_APPKEYPAD = 4,
111 MODE_ALTSCREEN = 8,
112 MODE_CRLF = 16,
113 MODE_MOUSEBTN = 32,
114 MODE_MOUSEMOTION = 64,
115 MODE_MOUSE = 32|64,
116 MODE_REVERSE = 128,
117 MODE_KBDLOCK = 256,
118 MODE_HIDE = 512,
119 MODE_ECHO = 1024,
120 MODE_APPCURSOR = 2048,
121 MODE_MOUSESGR = 4096,
122 };
123
124 enum escape_state {
125 ESC_START = 1,
126 ESC_CSI = 2,
127 ESC_STR = 4, /* DSC, OSC, PM, APC */
128 ESC_ALTCHARSET = 8,
129 ESC_STR_END = 16, /* a final string was encountered */
130 ESC_TEST = 32, /* Enter in test mode */
131 };
132
133 enum window_state {
134 WIN_VISIBLE = 1,
135 WIN_REDRAW = 2,
136 WIN_FOCUSED = 4
137 };
138
139 enum selection_type {
140 SEL_REGULAR = 1,
141 SEL_RECTANGULAR = 2
142 };
143
144 /* bit macro */
145 #undef B0
146 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
147
148 typedef unsigned char uchar;
149 typedef unsigned int uint;
150 typedef unsigned long ulong;
151 typedef unsigned short ushort;
152
153 typedef struct {
154 char c[UTF_SIZ]; /* character code */
155 uchar mode; /* attribute flags */
156 ushort fg; /* foreground */
157 ushort bg; /* background */
158 uchar state; /* state flags */
159 } Glyph;
160
161 typedef Glyph *Line;
162
163 typedef struct {
164 Glyph attr; /* current char attributes */
165 int x;
166 int y;
167 char state;
168 } TCursor;
169
170 /* CSI Escape sequence structs */
171 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
172 typedef struct {
173 char buf[ESC_BUF_SIZ]; /* raw string */
174 int len; /* raw string length */
175 char priv;
176 int arg[ESC_ARG_SIZ];
177 int narg; /* nb of args */
178 char mode;
179 } CSIEscape;
180
181 /* STR Escape sequence structs */
182 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
183 typedef struct {
184 char type; /* ESC type ... */
185 char buf[STR_BUF_SIZ]; /* raw string */
186 int len; /* raw string length */
187 char *args[STR_ARG_SIZ];
188 int narg; /* nb of args */
189 } STREscape;
190
191 /* Internal representation of the screen */
192 typedef struct {
193 int row; /* nb row */
194 int col; /* nb col */
195 Line *line; /* screen */
196 Line *alt; /* alternate screen */
197 bool *dirty; /* dirtyness of lines */
198 TCursor c; /* cursor */
199 int top; /* top scroll limit */
200 int bot; /* bottom scroll limit */
201 int mode; /* terminal mode flags */
202 int esc; /* escape state flags */
203 bool numlock; /* lock numbers in keyboard */
204 bool *tabs;
205 } Term;
206
207 /* Purely graphic info */
208 typedef struct {
209 Display *dpy;
210 Colourmap cmap;
211 Window win;
212 Drawable buf;
213 Atom xembed, wmdeletewin;
214 XIM xim;
215 XIC xic;
216 Draw draw;
217 Visual *vis;
218 int scr;
219 bool isfixed; /* is fixed geometry? */
220 int fx, fy, fw, fh; /* fixed geometry */
221 int tw, th; /* tty width and height */
222 int w, h; /* window width and height */
223 int ch; /* char height */
224 int cw; /* char width */
225 char state; /* focus, redraw, visible */
226 } XWindow;
227
228 typedef struct {
229 KeySym k;
230 uint mask;
231 char s[ESC_BUF_SIZ];
232 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
233 signed char appkey; /* application keypad */
234 signed char appcursor; /* application cursor */
235 signed char crlf; /* crlf mode */
236 } Key;
237
238 /* TODO: use better name for vars... */
239 typedef struct {
240 int mode;
241 int type;
242 int bx, by;
243 int ex, ey;
244 struct {
245 int x, y;
246 } b, e;
247 char *clip;
248 Atom xtarget;
249 bool alt;
250 struct timeval tclick1;
251 struct timeval tclick2;
252 } Selection;
253
254 typedef union {
255 int i;
256 unsigned int ui;
257 float f;
258 const void *v;
259 } Arg;
260
261 typedef struct {
262 unsigned int mod;
263 KeySym keysym;
264 void (*func)(const Arg *);
265 const Arg arg;
266 } Shortcut;
267
268 /* function definitions used in config.h */
269 static void clippaste(const Arg *);
270 static void numlock(const Arg *);
271 static void selpaste(const Arg *);
272 static void xzoom(const Arg *);
273
274 /* Config.h for applying patches and the configuration. */
275 #include "config.h"
276
277 /* Font structure */
278 typedef struct {
279 int height;
280 int width;
281 int ascent;
282 int descent;
283 short lbearing;
284 short rbearing;
285 XftFont *match;
286 FcFontSet *set;
287 FcPattern *pattern;
288 } Font;
289
290 /* Drawing Context */
291 typedef struct {
292 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
293 Font font, bfont, ifont, ibfont;
294 GC gc;
295 } DC;
296
297 static void die(const char *, ...);
298 static void draw(void);
299 static void redraw(int);
300 static void drawregion(int, int, int, int);
301 static void execsh(void);
302 static void sigchld(int);
303 static void run(void);
304
305 static void csidump(void);
306 static void csihandle(void);
307 static void csiparse(void);
308 static void csireset(void);
309 static void strdump(void);
310 static void strhandle(void);
311 static void strparse(void);
312 static void strreset(void);
313
314 static void tclearregion(int, int, int, int, int);
315 static void tcursor(int);
316 static void tdeletechar(int);
317 static void tdeleteline(int);
318 static void tinsertblank(int);
319 static void tinsertblankline(int);
320 static void tmoveto(int, int);
321 static void tmoveato(int x, int y);
322 static void tnew(int, int);
323 static void tnewline(int);
324 static void tputtab(bool);
325 static void tputc(char *, int);
326 static void treset(void);
327 static int tresize(int, int);
328 static void tscrollup(int, int);
329 static void tscrolldown(int, int);
330 static void tsetattr(int*, int);
331 static void tsetchar(char *, Glyph *, int, int);
332 static void tsetscroll(int, int);
333 static void tswapscreen(void);
334 static void tsetdirt(int, int);
335 static void tsetmode(bool, bool, int *, int);
336 static void tfulldirt(void);
337 static void techo(char *, int);
338
339 static inline bool match(uint, uint);
340 static void ttynew(void);
341 static void ttyread(void);
342 static void ttyresize(void);
343 static void ttywrite(const char *, size_t);
344
345 static void xdraws(char *, Glyph, int, int, int, int);
346 static void xhints(void);
347 static void xclear(int, int, int, int);
348 static void xdrawcursor(void);
349 static void xinit(void);
350 static void xloadcols(void);
351 static int xsetcolorname(int, const char *);
352 static int xloadfont(Font *, FcPattern *);
353 static void xloadfonts(char *, int);
354 static void xsettitle(char *);
355 static void xresettitle(void);
356 static void xseturgency(int);
357 static void xsetsel(char*);
358 static void xtermclear(int, int, int, int);
359 static void xunloadfonts(void);
360 static void xresize(int, int);
361
362 static void expose(XEvent *);
363 static void visibility(XEvent *);
364 static void unmap(XEvent *);
365 static char *kmap(KeySym, uint);
366 static void kpress(XEvent *);
367 static void cmessage(XEvent *);
368 static void cresize(int, int);
369 static void resize(XEvent *);
370 static void focus(XEvent *);
371 static void brelease(XEvent *);
372 static void bpress(XEvent *);
373 static void bmotion(XEvent *);
374 static void selnotify(XEvent *);
375 static void selclear(XEvent *);
376 static void selrequest(XEvent *);
377
378 static void selinit(void);
379 static inline bool selected(int, int);
380 static void selcopy(void);
381 static void selscroll(int, int);
382
383 static int utf8decode(char *, long *);
384 static int utf8encode(long *, char *);
385 static int utf8size(char *);
386 static int isfullutf8(char *, int);
387
388 static ssize_t xwrite(int, char *, size_t);
389 static void *xmalloc(size_t);
390 static void *xrealloc(void *, size_t);
391 static void *xcalloc(size_t, size_t);
392
393 static void (*handler[LASTEvent])(XEvent *) = {
394 [KeyPress] = kpress,
395 [ClientMessage] = cmessage,
396 [ConfigureNotify] = resize,
397 [VisibilityNotify] = visibility,
398 [UnmapNotify] = unmap,
399 [Expose] = expose,
400 [FocusIn] = focus,
401 [FocusOut] = focus,
402 [MotionNotify] = bmotion,
403 [ButtonPress] = bpress,
404 [ButtonRelease] = brelease,
405 [SelectionClear] = selclear,
406 [SelectionNotify] = selnotify,
407 [SelectionRequest] = selrequest,
408 };
409
410 /* Globals */
411 static DC dc;
412 static XWindow xw;
413 static Term term;
414 static CSIEscape csiescseq;
415 static STREscape strescseq;
416 static int cmdfd;
417 static pid_t pid;
418 static Selection sel;
419 static int iofd = -1;
420 static char **opt_cmd = NULL;
421 static char *opt_io = NULL;
422 static char *opt_title = NULL;
423 static char *opt_embed = NULL;
424 static char *opt_class = NULL;
425 static char *opt_font = NULL;
426
427 static char *usedfont = NULL;
428 static int usedfontsize = 0;
429
430 /* Font Ring Cache */
431 enum {
432 FRC_NORMAL,
433 FRC_ITALIC,
434 FRC_BOLD,
435 FRC_ITALICBOLD
436 };
437
438 typedef struct {
439 XftFont *font;
440 long c;
441 int flags;
442 } Fontcache;
443
444 /*
445 * Fontcache is a ring buffer, with frccur as current position and frclen as
446 * the current length of used elements.
447 */
448
449 static Fontcache frc[1024];
450 static int frccur = -1, frclen = 0;
451
452 ssize_t
453 xwrite(int fd, char *s, size_t len) {
454 size_t aux = len;
455
456 while(len > 0) {
457 ssize_t r = write(fd, s, len);
458 if(r < 0)
459 return r;
460 len -= r;
461 s += r;
462 }
463 return aux;
464 }
465
466 void *
467 xmalloc(size_t len) {
468 void *p = malloc(len);
469
470 if(!p)
471 die("Out of memory\n");
472
473 return p;
474 }
475
476 void *
477 xrealloc(void *p, size_t len) {
478 if((p = realloc(p, len)) == NULL)
479 die("Out of memory\n");
480
481 return p;
482 }
483
484 void *
485 xcalloc(size_t nmemb, size_t size) {
486 void *p = calloc(nmemb, size);
487
488 if(!p)
489 die("Out of memory\n");
490
491 return p;
492 }
493
494 int
495 utf8decode(char *s, long *u) {
496 uchar c;
497 int i, n, rtn;
498
499 rtn = 1;
500 c = *s;
501 if(~c & B7) { /* 0xxxxxxx */
502 *u = c;
503 return rtn;
504 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
505 *u = c&(B4|B3|B2|B1|B0);
506 n = 1;
507 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
508 *u = c&(B3|B2|B1|B0);
509 n = 2;
510 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
511 *u = c & (B2|B1|B0);
512 n = 3;
513 } else {
514 goto invalid;
515 }
516
517 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
518 c = *s;
519 if((c & (B7|B6)) != B7) /* 10xxxxxx */
520 goto invalid;
521 *u <<= 6;
522 *u |= c & (B5|B4|B3|B2|B1|B0);
523 }
524
525 if((n == 1 && *u < 0x80) ||
526 (n == 2 && *u < 0x800) ||
527 (n == 3 && *u < 0x10000) ||
528 (*u >= 0xD800 && *u <= 0xDFFF)) {
529 goto invalid;
530 }
531
532 return rtn;
533 invalid:
534 *u = 0xFFFD;
535
536 return rtn;
537 }
538
539 int
540 utf8encode(long *u, char *s) {
541 uchar *sp;
542 ulong uc;
543 int i, n;
544
545 sp = (uchar *)s;
546 uc = *u;
547 if(uc < 0x80) {
548 *sp = uc; /* 0xxxxxxx */
549 return 1;
550 } else if(*u < 0x800) {
551 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
552 n = 1;
553 } else if(uc < 0x10000) {
554 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
555 n = 2;
556 } else if(uc <= 0x10FFFF) {
557 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
558 n = 3;
559 } else {
560 goto invalid;
561 }
562
563 for(i=n,++sp; i>0; --i,++sp)
564 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
565
566 return n+1;
567 invalid:
568 /* U+FFFD */
569 *s++ = '\xEF';
570 *s++ = '\xBF';
571 *s = '\xBD';
572
573 return 3;
574 }
575
576 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
577 UTF-8 otherwise return 0 */
578 int
579 isfullutf8(char *s, int b) {
580 uchar *c1, *c2, *c3;
581
582 c1 = (uchar *)s;
583 c2 = (uchar *)++s;
584 c3 = (uchar *)++s;
585 if(b < 1) {
586 return 0;
587 } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
588 return 0;
589 } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
590 ((b == 1) ||
591 ((b == 2) && (*c2&(B7|B6)) == B7))) {
592 return 0;
593 } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
594 ((b == 1) ||
595 ((b == 2) && (*c2&(B7|B6)) == B7) ||
596 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
597 return 0;
598 } else {
599 return 1;
600 }
601 }
602
603 int
604 utf8size(char *s) {
605 uchar c = *s;
606
607 if(~c&B7) {
608 return 1;
609 } else if((c&(B7|B6|B5)) == (B7|B6)) {
610 return 2;
611 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
612 return 3;
613 } else {
614 return 4;
615 }
616 }
617
618 void
619 selinit(void) {
620 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
621 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
622 sel.mode = 0;
623 sel.bx = -1;
624 sel.clip = NULL;
625 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
626 if(sel.xtarget == None)
627 sel.xtarget = XA_STRING;
628 }
629
630 static int
631 x2col(int x) {
632 x -= borderpx;
633 x /= xw.cw;
634
635 return LIMIT(x, 0, term.col-1);
636 }
637
638 static int
639 y2row(int y) {
640 y -= borderpx;
641 y /= xw.ch;
642
643 return LIMIT(y, 0, term.row-1);
644 }
645
646 static inline bool
647 selected(int x, int y) {
648 int bx, ex;
649
650 if(sel.ey == y && sel.by == y) {
651 bx = MIN(sel.bx, sel.ex);
652 ex = MAX(sel.bx, sel.ex);
653 return BETWEEN(x, bx, ex);
654 }
655
656 return ((sel.b.y < y && y < sel.e.y)
657 || (y == sel.e.y && x <= sel.e.x))
658 || (y == sel.b.y && x >= sel.b.x
659 && (x <= sel.e.x || sel.b.y != sel.e.y));
660 switch(sel.type) {
661 case SEL_REGULAR:
662 return ((sel.b.y < y && y < sel.e.y)
663 || (y == sel.e.y && x <= sel.e.x))
664 || (y == sel.b.y && x >= sel.b.x
665 && (x <= sel.e.x || sel.b.y != sel.e.y));
666 case SEL_RECTANGULAR:
667 return ((sel.b.y <= y && y <= sel.e.y)
668 && (sel.b.x <= x && x <= sel.e.x));
669 };
670 }
671
672 void
673 getbuttoninfo(XEvent *e) {
674 int type;
675 uint state = e->xbutton.state &~Button1Mask;
676
677 sel.alt = IS_SET(MODE_ALTSCREEN);
678
679 sel.ex = x2col(e->xbutton.x);
680 sel.ey = y2row(e->xbutton.y);
681
682 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
683 sel.b.y = MIN(sel.by, sel.ey);
684 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
685 sel.e.y = MAX(sel.by, sel.ey);
686
687 sel.type = SEL_REGULAR;
688 for(type = 1; type < LEN(selmasks); ++type) {
689 if(match(selmasks[type], state)) {
690 sel.type = type;
691 break;
692 }
693 }
694 }
695
696 void
697 mousereport(XEvent *e) {
698 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
699 button = e->xbutton.button, state = e->xbutton.state,
700 len;
701 char buf[40];
702 static int ob, ox, oy;
703
704 /* from urxvt */
705 if(e->xbutton.type == MotionNotify) {
706 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
707 return;
708 button = ob + 32;
709 ox = x, oy = y;
710 } else if(!IS_SET(MODE_MOUSESGR)
711 && (e->xbutton.type == ButtonRelease
712 || button == AnyButton)) {
713 button = 3;
714 } else {
715 button -= Button1;
716 if(button >= 3)
717 button += 64 - 3;
718 if(e->xbutton.type == ButtonPress) {
719 ob = button;
720 ox = x, oy = y;
721 }
722 }
723
724 button += (state & ShiftMask ? 4 : 0)
725 + (state & Mod4Mask ? 8 : 0)
726 + (state & ControlMask ? 16 : 0);
727
728 len = 0;
729 if(IS_SET(MODE_MOUSESGR)) {
730 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
731 button, x+1, y+1,
732 e->xbutton.type == ButtonRelease ? 'm' : 'M');
733 } else if(x < 223 && y < 223) {
734 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
735 32+button, 32+x+1, 32+y+1);
736 } else {
737 return;
738 }
739
740 ttywrite(buf, len);
741 }
742
743 void
744 bpress(XEvent *e) {
745 if(IS_SET(MODE_MOUSE)) {
746 mousereport(e);
747 } else if(e->xbutton.button == Button1) {
748 if(sel.bx != -1) {
749 sel.bx = -1;
750 tsetdirt(sel.b.y, sel.e.y);
751 draw();
752 }
753 sel.mode = 1;
754 sel.type = SEL_REGULAR;
755 sel.ex = sel.bx = x2col(e->xbutton.x);
756 sel.ey = sel.by = y2row(e->xbutton.y);
757 } else if(e->xbutton.button == Button4) {
758 ttywrite("\031", 1);
759 } else if(e->xbutton.button == Button5) {
760 ttywrite("\005", 1);
761 }
762 }
763
764 void
765 selcopy(void) {
766 char *str, *ptr, *p;
767 int x, y, bufsize, is_selected = 0, size;
768 Glyph *gp, *last;
769
770 if(sel.bx == -1) {
771 str = NULL;
772 } else {
773 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
774 ptr = str = xmalloc(bufsize);
775
776 /* append every set & selected glyph to the selection */
777 for(y = sel.b.y; y < sel.e.y + 1; y++) {
778 is_selected = 0;
779 gp = &term.line[y][0];
780 last = gp + term.col;
781
782 while(--last >= gp && !(last->state & GLYPH_SET))
783 /* nothing */;
784
785 for(x = 0; gp <= last; x++, ++gp) {
786 if(!selected(x, y)) {
787 continue;
788 } else {
789 is_selected = 1;
790 }
791
792 p = (gp->state & GLYPH_SET) ? gp->c : " ";
793 size = utf8size(p);
794 memcpy(ptr, p, size);
795 ptr += size;
796 }
797 /* \n at the end of every selected line except for the last one */
798 if(is_selected && y < sel.e.y)
799 *ptr++ = '\n';
800 }
801 *ptr = 0;
802 }
803 xsetsel(str);
804 }
805
806 void
807 selnotify(XEvent *e) {
808 ulong nitems, ofs, rem;
809 int format;
810 uchar *data;
811 Atom type;
812
813 ofs = 0;
814 do {
815 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
816 False, AnyPropertyType, &type, &format,
817 &nitems, &rem, &data)) {
818 fprintf(stderr, "Clipboard allocation failed\n");
819 return;
820 }
821 ttywrite((const char *) data, nitems * format / 8);
822 XFree(data);
823 /* number of 32-bit chunks returned */
824 ofs += nitems * format / 32;
825 } while(rem > 0);
826 }
827
828 void
829 selpaste(const Arg *dummy) {
830 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
831 xw.win, CurrentTime);
832 }
833
834 void
835 clippaste(const Arg *dummy) {
836 Atom clipboard;
837
838 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
839 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
840 xw.win, CurrentTime);
841 }
842
843 void
844 selclear(XEvent *e) {
845 if(sel.bx == -1)
846 return;
847 sel.bx = -1;
848 tsetdirt(sel.b.y, sel.e.y);
849 }
850
851 void
852 selrequest(XEvent *e) {
853 XSelectionRequestEvent *xsre;
854 XSelectionEvent xev;
855 Atom xa_targets, string;
856
857 xsre = (XSelectionRequestEvent *) e;
858 xev.type = SelectionNotify;
859 xev.requestor = xsre->requestor;
860 xev.selection = xsre->selection;
861 xev.target = xsre->target;
862 xev.time = xsre->time;
863 /* reject */
864 xev.property = None;
865
866 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
867 if(xsre->target == xa_targets) {
868 /* respond with the supported type */
869 string = sel.xtarget;
870 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
871 XA_ATOM, 32, PropModeReplace,
872 (uchar *) &string, 1);
873 xev.property = xsre->property;
874 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
875 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
876 xsre->target, 8, PropModeReplace,
877 (uchar *) sel.clip, strlen(sel.clip));
878 xev.property = xsre->property;
879 }
880
881 /* all done, send a notification to the listener */
882 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
883 fprintf(stderr, "Error sending SelectionNotify event\n");
884 }
885
886 void
887 xsetsel(char *str) {
888 /* register the selection for both the clipboard and the primary */
889 Atom clipboard;
890
891 free(sel.clip);
892 sel.clip = str;
893
894 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
895
896 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
897 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
898 }
899
900 void
901 brelease(XEvent *e) {
902 struct timeval now;
903
904 if(IS_SET(MODE_MOUSE)) {
905 mousereport(e);
906 return;
907 }
908
909 if(e->xbutton.button == Button2) {
910 selpaste(NULL);
911 } else if(e->xbutton.button == Button1) {
912 sel.mode = 0;
913 getbuttoninfo(e);
914 term.dirty[sel.ey] = 1;
915 if(sel.bx == sel.ex && sel.by == sel.ey) {
916 sel.bx = -1;
917 gettimeofday(&now, NULL);
918
919 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
920 /* triple click on the line */
921 sel.b.x = sel.bx = 0;
922 sel.e.x = sel.ex = term.col;
923 sel.b.y = sel.e.y = sel.ey;
924 selcopy();
925 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
926 /* double click to select word */
927 sel.bx = sel.ex;
928 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
929 term.line[sel.ey][sel.bx-1].c[0] != ' ') {
930 sel.bx--;
931 }
932 sel.b.x = sel.bx;
933 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
934 term.line[sel.ey][sel.ex+1].c[0] != ' ') {
935 sel.ex++;
936 }
937 sel.e.x = sel.ex;
938 sel.b.y = sel.e.y = sel.ey;
939 selcopy();
940 }
941 } else {
942 selcopy();
943 }
944 }
945
946 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
947 gettimeofday(&sel.tclick1, NULL);
948 }
949
950 void
951 bmotion(XEvent *e) {
952 int oldey, oldex, oldsby, oldsey;
953
954 if(IS_SET(MODE_MOUSE)) {
955 mousereport(e);
956 return;
957 }
958
959 if(!sel.mode)
960 return;
961
962 oldey = sel.ey;
963 oldex = sel.ex;
964 oldsby = sel.b.y;
965 oldsey = sel.e.y;
966 getbuttoninfo(e);
967
968 if(oldey != sel.ey || oldex != sel.ex) {
969 tsetdirt(MIN(sel.b.y, oldsby), MAX(sel.e.y, oldsey));
970 }
971 }
972
973 void
974 die(const char *errstr, ...) {
975 va_list ap;
976
977 va_start(ap, errstr);
978 vfprintf(stderr, errstr, ap);
979 va_end(ap);
980 exit(EXIT_FAILURE);
981 }
982
983 void
984 execsh(void) {
985 char **args;
986 char *envshell = getenv("SHELL");
987 const struct passwd *pass = getpwuid(getuid());
988 char buf[sizeof(long) * 8 + 1];
989
990 unsetenv("COLUMNS");
991 unsetenv("LINES");
992 unsetenv("TERMCAP");
993
994 if(pass) {
995 setenv("LOGNAME", pass->pw_name, 1);
996 setenv("USER", pass->pw_name, 1);
997 setenv("SHELL", pass->pw_shell, 0);
998 setenv("HOME", pass->pw_dir, 0);
999 }
1000
1001 snprintf(buf, sizeof(buf), "%lu", xw.win);
1002 setenv("WINDOWID", buf, 1);
1003
1004 signal(SIGCHLD, SIG_DFL);
1005 signal(SIGHUP, SIG_DFL);
1006 signal(SIGINT, SIG_DFL);
1007 signal(SIGQUIT, SIG_DFL);
1008 signal(SIGTERM, SIG_DFL);
1009 signal(SIGALRM, SIG_DFL);
1010
1011 DEFAULT(envshell, shell);
1012 setenv("TERM", termname, 1);
1013 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1014 execvp(args[0], args);
1015 exit(EXIT_FAILURE);
1016 }
1017
1018 void
1019 sigchld(int a) {
1020 int stat = 0;
1021
1022 if(waitpid(pid, &stat, 0) < 0)
1023 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1024
1025 if(WIFEXITED(stat)) {
1026 exit(WEXITSTATUS(stat));
1027 } else {
1028 exit(EXIT_FAILURE);
1029 }
1030 }
1031
1032 void
1033 ttynew(void) {
1034 int m, s;
1035 struct winsize w = {term.row, term.col, 0, 0};
1036
1037 /* seems to work fine on linux, openbsd and freebsd */
1038 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1039 die("openpty failed: %s\n", SERRNO);
1040
1041 switch(pid = fork()) {
1042 case -1:
1043 die("fork failed\n");
1044 break;
1045 case 0:
1046 setsid(); /* create a new process group */
1047 dup2(s, STDIN_FILENO);
1048 dup2(s, STDOUT_FILENO);
1049 dup2(s, STDERR_FILENO);
1050 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1051 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1052 close(s);
1053 close(m);
1054 execsh();
1055 break;
1056 default:
1057 close(s);
1058 cmdfd = m;
1059 signal(SIGCHLD, sigchld);
1060 if(opt_io) {
1061 iofd = (!strcmp(opt_io, "-")) ?
1062 STDOUT_FILENO :
1063 open(opt_io, O_WRONLY | O_CREAT, 0666);
1064 if(iofd < 0) {
1065 fprintf(stderr, "Error opening %s:%s\n",
1066 opt_io, strerror(errno));
1067 }
1068 }
1069 }
1070 }
1071
1072 void
1073 dump(char c) {
1074 static int col;
1075
1076 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1077 if(++col % 10 == 0)
1078 fprintf(stderr, "\n");
1079 }
1080
1081 void
1082 ttyread(void) {
1083 static char buf[BUFSIZ];
1084 static int buflen = 0;
1085 char *ptr;
1086 char s[UTF_SIZ];
1087 int charsize; /* size of utf8 char in bytes */
1088 long utf8c;
1089 int ret;
1090
1091 /* append read bytes to unprocessed bytes */
1092 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1093 die("Couldn't read from shell: %s\n", SERRNO);
1094
1095 /* process every complete utf8 char */
1096 buflen += ret;
1097 ptr = buf;
1098 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1099 charsize = utf8decode(ptr, &utf8c);
1100 utf8encode(&utf8c, s);
1101 tputc(s, charsize);
1102 ptr += charsize;
1103 buflen -= charsize;
1104 }
1105
1106 /* keep any uncomplete utf8 char for the next call */
1107 memmove(buf, ptr, buflen);
1108 }
1109
1110 void
1111 ttywrite(const char *s, size_t n) {
1112 if(write(cmdfd, s, n) == -1)
1113 die("write error on tty: %s\n", SERRNO);
1114 }
1115
1116 void
1117 ttyresize(void) {
1118 struct winsize w;
1119
1120 w.ws_row = term.row;
1121 w.ws_col = term.col;
1122 w.ws_xpixel = xw.tw;
1123 w.ws_ypixel = xw.th;
1124 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1125 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1126 }
1127
1128 void
1129 tsetdirt(int top, int bot) {
1130 int i;
1131
1132 LIMIT(top, 0, term.row-1);
1133 LIMIT(bot, 0, term.row-1);
1134
1135 for(i = top; i <= bot; i++)
1136 term.dirty[i] = 1;
1137 }
1138
1139 void
1140 tfulldirt(void) {
1141 tsetdirt(0, term.row-1);
1142 }
1143
1144 void
1145 tcursor(int mode) {
1146 static TCursor c;
1147
1148 if(mode == CURSOR_SAVE) {
1149 c = term.c;
1150 } else if(mode == CURSOR_LOAD) {
1151 term.c = c;
1152 tmoveto(c.x, c.y);
1153 }
1154 }
1155
1156 void
1157 treset(void) {
1158 uint i;
1159
1160 term.c = (TCursor){{
1161 .mode = ATTR_NULL,
1162 .fg = defaultfg,
1163 .bg = defaultbg
1164 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1165
1166 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1167 for(i = tabspaces; i < term.col; i += tabspaces)
1168 term.tabs[i] = 1;
1169 term.top = 0;
1170 term.bot = term.row - 1;
1171 term.mode = MODE_WRAP;
1172
1173 tclearregion(0, 0, term.col-1, term.row-1, 0);
1174 tmoveto(0, 0);
1175 tcursor(CURSOR_SAVE);
1176 }
1177
1178 void
1179 tnew(int col, int row) {
1180 /* set screen size */
1181 term.row = row;
1182 term.col = col;
1183 term.line = xmalloc(term.row * sizeof(Line));
1184 term.alt = xmalloc(term.row * sizeof(Line));
1185 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
1186 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
1187
1188 for(row = 0; row < term.row; row++) {
1189 term.line[row] = xmalloc(term.col * sizeof(Glyph));
1190 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
1191 term.dirty[row] = 0;
1192 }
1193
1194 term.numlock = 1;
1195 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1196 /* setup screen */
1197 treset();
1198 }
1199
1200 void
1201 tswapscreen(void) {
1202 Line *tmp = term.line;
1203
1204 term.line = term.alt;
1205 term.alt = tmp;
1206 term.mode ^= MODE_ALTSCREEN;
1207 tfulldirt();
1208 }
1209
1210 void
1211 tscrolldown(int orig, int n) {
1212 int i;
1213 Line temp;
1214
1215 LIMIT(n, 0, term.bot-orig+1);
1216
1217 tclearregion(0, term.bot-n+1, term.col-1, term.bot, 0);
1218
1219 for(i = term.bot; i >= orig+n; i--) {
1220 temp = term.line[i];
1221 term.line[i] = term.line[i-n];
1222 term.line[i-n] = temp;
1223
1224 term.dirty[i] = 1;
1225 term.dirty[i-n] = 1;
1226 }
1227
1228 selscroll(orig, n);
1229 }
1230
1231 void
1232 tscrollup(int orig, int n) {
1233 int i;
1234 Line temp;
1235 LIMIT(n, 0, term.bot-orig+1);
1236
1237 tclearregion(0, orig, term.col-1, orig+n-1, 0);
1238
1239 for(i = orig; i <= term.bot-n; i++) {
1240 temp = term.line[i];
1241 term.line[i] = term.line[i+n];
1242 term.line[i+n] = temp;
1243
1244 term.dirty[i] = 1;
1245 term.dirty[i+n] = 1;
1246 }
1247
1248 selscroll(orig, -n);
1249 }
1250
1251 void
1252 selscroll(int orig, int n) {
1253 if(sel.bx == -1)
1254 return;
1255
1256 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1257 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1258 sel.bx = -1;
1259 return;
1260 }
1261 switch(sel.type) {
1262 case SEL_REGULAR:
1263 if(sel.by < term.top) {
1264 sel.by = term.top;
1265 sel.bx = 0;
1266 }
1267 if(sel.ey > term.bot) {
1268 sel.ey = term.bot;
1269 sel.ex = term.col;
1270 }
1271 break;
1272 case SEL_RECTANGULAR:
1273 if(sel.by < term.top)
1274 sel.by = term.top;
1275 if(sel.ey > term.bot)
1276 sel.ey = term.bot;
1277 break;
1278 };
1279 sel.b.y = sel.by, sel.b.x = sel.bx;
1280 sel.e.y = sel.ey, sel.e.x = sel.ex;
1281 }
1282 }
1283
1284 void
1285 tnewline(int first_col) {
1286 int y = term.c.y;
1287
1288 if(y == term.bot) {
1289 tscrollup(term.top, 1);
1290 } else {
1291 y++;
1292 }
1293 tmoveto(first_col ? 0 : term.c.x, y);
1294 }
1295
1296 void
1297 csiparse(void) {
1298 char *p = csiescseq.buf, *np;
1299 long int v;
1300
1301 csiescseq.narg = 0;
1302 if(*p == '?') {
1303 csiescseq.priv = 1;
1304 p++;
1305 }
1306
1307 while(p < csiescseq.buf+csiescseq.len) {
1308 np = NULL;
1309 v = strtol(p, &np, 10);
1310 if(np == p)
1311 v = 0;
1312 if(v == LONG_MAX || v == LONG_MIN)
1313 v = -1;
1314 csiescseq.arg[csiescseq.narg++] = v;
1315 p = np;
1316 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1317 break;
1318 p++;
1319 }
1320 csiescseq.mode = *p;
1321 }
1322
1323 /* for absolute user moves, when decom is set */
1324 void
1325 tmoveato(int x, int y) {
1326 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1327 }
1328
1329 void
1330 tmoveto(int x, int y) {
1331 int miny, maxy;
1332
1333 if(term.c.state & CURSOR_ORIGIN) {
1334 miny = term.top;
1335 maxy = term.bot;
1336 } else {
1337 miny = 0;
1338 maxy = term.row - 1;
1339 }
1340 LIMIT(x, 0, term.col-1);
1341 LIMIT(y, miny, maxy);
1342 term.c.state &= ~CURSOR_WRAPNEXT;
1343 term.c.x = x;
1344 term.c.y = y;
1345 }
1346
1347 void
1348 tsetchar(char *c, Glyph *attr, int x, int y) {
1349 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1350 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1351 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1352 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1353 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1354 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1355 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1356 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1357 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1358 };
1359
1360 /*
1361 * The table is proudly stolen from rxvt.
1362 */
1363 if(attr->mode & ATTR_GFX) {
1364 if(c[0] >= 0x41 && c[0] <= 0x7e
1365 && vt100_0[c[0] - 0x41]) {
1366 c = vt100_0[c[0] - 0x41];
1367 }
1368 }
1369
1370 term.dirty[y] = 1;
1371 term.line[y][x] = *attr;
1372 memcpy(term.line[y][x].c, c, UTF_SIZ);
1373 term.line[y][x].state |= GLYPH_SET;
1374 }
1375
1376 void
1377 tclearregion(int x1, int y1, int x2, int y2, int bce) {
1378 int x, y, temp;
1379
1380 if(x1 > x2)
1381 temp = x1, x1 = x2, x2 = temp;
1382 if(y1 > y2)
1383 temp = y1, y1 = y2, y2 = temp;
1384
1385 LIMIT(x1, 0, term.col-1);
1386 LIMIT(x2, 0, term.col-1);
1387 LIMIT(y1, 0, term.row-1);
1388 LIMIT(y2, 0, term.row-1);
1389
1390 for(y = y1; y <= y2; y++) {
1391 term.dirty[y] = 1;
1392 for(x = x1; x <= x2; x++) {
1393 if(bce) {
1394 term.line[y][x] = term.c.attr;
1395 memcpy(term.line[y][x].c, " ", 2);
1396 term.line[y][x].state |= GLYPH_SET;
1397 } else {
1398 term.line[y][x].state = 0;
1399 }
1400 }
1401 }
1402 }
1403
1404 void
1405 tdeletechar(int n) {
1406 int src = term.c.x + n;
1407 int dst = term.c.x;
1408 int size = term.col - src;
1409
1410 term.dirty[term.c.y] = 1;
1411
1412 if(src >= term.col) {
1413 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1414 return;
1415 }
1416
1417 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1418 size * sizeof(Glyph));
1419 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y, 0);
1420 }
1421
1422 void
1423 tinsertblank(int n) {
1424 int src = term.c.x;
1425 int dst = src + n;
1426 int size = term.col - dst;
1427
1428 term.dirty[term.c.y] = 1;
1429
1430 if(dst >= term.col) {
1431 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1432 return;
1433 }
1434
1435 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1436 size * sizeof(Glyph));
1437 tclearregion(src, term.c.y, dst - 1, term.c.y, 0);
1438 }
1439
1440 void
1441 tinsertblankline(int n) {
1442 if(term.c.y < term.top || term.c.y > term.bot)
1443 return;
1444
1445 tscrolldown(term.c.y, n);
1446 }
1447
1448 void
1449 tdeleteline(int n) {
1450 if(term.c.y < term.top || term.c.y > term.bot)
1451 return;
1452
1453 tscrollup(term.c.y, n);
1454 }
1455
1456 void
1457 tsetattr(int *attr, int l) {
1458 int i;
1459
1460 for(i = 0; i < l; i++) {
1461 switch(attr[i]) {
1462 case 0:
1463 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1464 | ATTR_ITALIC | ATTR_BLINK);
1465 term.c.attr.fg = defaultfg;
1466 term.c.attr.bg = defaultbg;
1467 break;
1468 case 1:
1469 term.c.attr.mode |= ATTR_BOLD;
1470 break;
1471 case 3:
1472 term.c.attr.mode |= ATTR_ITALIC;
1473 break;
1474 case 4:
1475 term.c.attr.mode |= ATTR_UNDERLINE;
1476 break;
1477 case 5: /* slow blink */
1478 case 6: /* rapid blink */
1479 term.c.attr.mode |= ATTR_BLINK;
1480 break;
1481 case 7:
1482 term.c.attr.mode |= ATTR_REVERSE;
1483 break;
1484 case 21:
1485 case 22:
1486 term.c.attr.mode &= ~ATTR_BOLD;
1487 break;
1488 case 23:
1489 term.c.attr.mode &= ~ATTR_ITALIC;
1490 break;
1491 case 24:
1492 term.c.attr.mode &= ~ATTR_UNDERLINE;
1493 break;
1494 case 25:
1495 case 26:
1496 term.c.attr.mode &= ~ATTR_BLINK;
1497 break;
1498 case 27:
1499 term.c.attr.mode &= ~ATTR_REVERSE;
1500 break;
1501 case 38:
1502 if(i + 2 < l && attr[i + 1] == 5) {
1503 i += 2;
1504 if(BETWEEN(attr[i], 0, 255)) {
1505 term.c.attr.fg = attr[i];
1506 } else {
1507 fprintf(stderr,
1508 "erresc: bad fgcolor %d\n",
1509 attr[i]);
1510 }
1511 } else {
1512 fprintf(stderr,
1513 "erresc(38): gfx attr %d unknown\n",
1514 attr[i]);
1515 }
1516 break;
1517 case 39:
1518 term.c.attr.fg = defaultfg;
1519 break;
1520 case 48:
1521 if(i + 2 < l && attr[i + 1] == 5) {
1522 i += 2;
1523 if(BETWEEN(attr[i], 0, 255)) {
1524 term.c.attr.bg = attr[i];
1525 } else {
1526 fprintf(stderr,
1527 "erresc: bad bgcolor %d\n",
1528 attr[i]);
1529 }
1530 } else {
1531 fprintf(stderr,
1532 "erresc(48): gfx attr %d unknown\n",
1533 attr[i]);
1534 }
1535 break;
1536 case 49:
1537 term.c.attr.bg = defaultbg;
1538 break;
1539 default:
1540 if(BETWEEN(attr[i], 30, 37)) {
1541 term.c.attr.fg = attr[i] - 30;
1542 } else if(BETWEEN(attr[i], 40, 47)) {
1543 term.c.attr.bg = attr[i] - 40;
1544 } else if(BETWEEN(attr[i], 90, 97)) {
1545 term.c.attr.fg = attr[i] - 90 + 8;
1546 } else if(BETWEEN(attr[i], 100, 107)) {
1547 term.c.attr.bg = attr[i] - 100 + 8;
1548 } else {
1549 fprintf(stderr,
1550 "erresc(default): gfx attr %d unknown\n",
1551 attr[i]), csidump();
1552 }
1553 break;
1554 }
1555 }
1556 }
1557
1558 void
1559 tsetscroll(int t, int b) {
1560 int temp;
1561
1562 LIMIT(t, 0, term.row-1);
1563 LIMIT(b, 0, term.row-1);
1564 if(t > b) {
1565 temp = t;
1566 t = b;
1567 b = temp;
1568 }
1569 term.top = t;
1570 term.bot = b;
1571 }
1572
1573 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1574
1575 void
1576 tsetmode(bool priv, bool set, int *args, int narg) {
1577 int *lim, mode;
1578 bool alt;
1579
1580 for(lim = args + narg; args < lim; ++args) {
1581 if(priv) {
1582 switch(*args) {
1583 break;
1584 case 1: /* DECCKM -- Cursor key */
1585 MODBIT(term.mode, set, MODE_APPCURSOR);
1586 break;
1587 case 5: /* DECSCNM -- Reverse video */
1588 mode = term.mode;
1589 MODBIT(term.mode, set, MODE_REVERSE);
1590 if(mode != term.mode)
1591 redraw(REDRAW_TIMEOUT);
1592 break;
1593 case 6: /* DECOM -- Origin */
1594 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1595 tmoveato(0, 0);
1596 break;
1597 case 7: /* DECAWM -- Auto wrap */
1598 MODBIT(term.mode, set, MODE_WRAP);
1599 break;
1600 case 0: /* Error (IGNORED) */
1601 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1602 case 3: /* DECCOLM -- Column (IGNORED) */
1603 case 4: /* DECSCLM -- Scroll (IGNORED) */
1604 case 8: /* DECARM -- Auto repeat (IGNORED) */
1605 case 18: /* DECPFF -- Printer feed (IGNORED) */
1606 case 19: /* DECPEX -- Printer extent (IGNORED) */
1607 case 42: /* DECNRCM -- National characters (IGNORED) */
1608 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1609 break;
1610 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1611 MODBIT(term.mode, !set, MODE_HIDE);
1612 break;
1613 case 1000: /* 1000,1002: enable xterm mouse report */
1614 MODBIT(term.mode, set, MODE_MOUSEBTN);
1615 MODBIT(term.mode, 0, MODE_MOUSEMOTION);
1616 break;
1617 case 1002:
1618 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1619 MODBIT(term.mode, 0, MODE_MOUSEBTN);
1620 break;
1621 case 1006:
1622 MODBIT(term.mode, set, MODE_MOUSESGR);
1623 break;
1624 case 1049: /* = 1047 and 1048 */
1625 case 47:
1626 case 1047: {
1627 alt = IS_SET(MODE_ALTSCREEN);
1628 if(alt) {
1629 tclearregion(0, 0, term.col-1,
1630 term.row-1, 0);
1631 }
1632 if(set ^ alt) /* set is always 1 or 0 */
1633 tswapscreen();
1634 if(*args != 1049)
1635 break;
1636 }
1637 /* pass through */
1638 case 1048:
1639 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1640 break;
1641 default:
1642 fprintf(stderr,
1643 "erresc: unknown private set/reset mode %d\n",
1644 *args);
1645 break;
1646 }
1647 } else {
1648 switch(*args) {
1649 case 0: /* Error (IGNORED) */
1650 break;
1651 case 2: /* KAM -- keyboard action */
1652 MODBIT(term.mode, set, MODE_KBDLOCK);
1653 break;
1654 case 4: /* IRM -- Insertion-replacement */
1655 MODBIT(term.mode, set, MODE_INSERT);
1656 break;
1657 case 12: /* SRM -- Send/Receive */
1658 MODBIT(term.mode, !set, MODE_ECHO);
1659 break;
1660 case 20: /* LNM -- Linefeed/new line */
1661 MODBIT(term.mode, set, MODE_CRLF);
1662 break;
1663 default:
1664 fprintf(stderr,
1665 "erresc: unknown set/reset mode %d\n",
1666 *args);
1667 break;
1668 }
1669 }
1670 }
1671 }
1672 #undef MODBIT
1673
1674
1675 void
1676 csihandle(void) {
1677 switch(csiescseq.mode) {
1678 default:
1679 unknown:
1680 fprintf(stderr, "erresc: unknown csi ");
1681 csidump();
1682 /* die(""); */
1683 break;
1684 case '@': /* ICH -- Insert <n> blank char */
1685 DEFAULT(csiescseq.arg[0], 1);
1686 tinsertblank(csiescseq.arg[0]);
1687 break;
1688 case 'A': /* CUU -- Cursor <n> Up */
1689 DEFAULT(csiescseq.arg[0], 1);
1690 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1691 break;
1692 case 'B': /* CUD -- Cursor <n> Down */
1693 case 'e': /* VPR --Cursor <n> Down */
1694 DEFAULT(csiescseq.arg[0], 1);
1695 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1696 break;
1697 case 'c': /* DA -- Device Attributes */
1698 if(csiescseq.arg[0] == 0)
1699 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1700 break;
1701 case 'C': /* CUF -- Cursor <n> Forward */
1702 case 'a': /* HPR -- Cursor <n> Forward */
1703 DEFAULT(csiescseq.arg[0], 1);
1704 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1705 break;
1706 case 'D': /* CUB -- Cursor <n> Backward */
1707 DEFAULT(csiescseq.arg[0], 1);
1708 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1709 break;
1710 case 'E': /* CNL -- Cursor <n> Down and first col */
1711 DEFAULT(csiescseq.arg[0], 1);
1712 tmoveto(0, term.c.y+csiescseq.arg[0]);
1713 break;
1714 case 'F': /* CPL -- Cursor <n> Up and first col */
1715 DEFAULT(csiescseq.arg[0], 1);
1716 tmoveto(0, term.c.y-csiescseq.arg[0]);
1717 break;
1718 case 'g': /* TBC -- Tabulation clear */
1719 switch(csiescseq.arg[0]) {
1720 case 0: /* clear current tab stop */
1721 term.tabs[term.c.x] = 0;
1722 break;
1723 case 3: /* clear all the tabs */
1724 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1725 break;
1726 default:
1727 goto unknown;
1728 }
1729 break;
1730 case 'G': /* CHA -- Move to <col> */
1731 case '`': /* HPA */
1732 DEFAULT(csiescseq.arg[0], 1);
1733 tmoveto(csiescseq.arg[0]-1, term.c.y);
1734 break;
1735 case 'H': /* CUP -- Move to <row> <col> */
1736 case 'f': /* HVP */
1737 DEFAULT(csiescseq.arg[0], 1);
1738 DEFAULT(csiescseq.arg[1], 1);
1739 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1740 break;
1741 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1742 DEFAULT(csiescseq.arg[0], 1);
1743 while(csiescseq.arg[0]--)
1744 tputtab(1);
1745 break;
1746 case 'J': /* ED -- Clear screen */
1747 sel.bx = -1;
1748 switch(csiescseq.arg[0]) {
1749 case 0: /* below */
1750 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 1);
1751 if(term.c.y < term.row-1) {
1752 tclearregion(0, term.c.y+1, term.col-1,
1753 term.row-1, 1);
1754 }
1755 break;
1756 case 1: /* above */
1757 if(term.c.y > 1)
1758 tclearregion(0, 0, term.col-1, term.c.y-1, 1);
1759 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1760 break;
1761 case 2: /* all */
1762 tclearregion(0, 0, term.col-1, term.row-1, 1);
1763 break;
1764 default:
1765 goto unknown;
1766 }
1767 break;
1768 case 'K': /* EL -- Clear line */
1769 switch(csiescseq.arg[0]) {
1770 case 0: /* right */
1771 tclearregion(term.c.x, term.c.y, term.col-1,
1772 term.c.y, 1);
1773 break;
1774 case 1: /* left */
1775 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1776 break;
1777 case 2: /* all */
1778 tclearregion(0, term.c.y, term.col-1, term.c.y, 1);
1779 break;
1780 }
1781 break;
1782 case 'S': /* SU -- Scroll <n> line up */
1783 DEFAULT(csiescseq.arg[0], 1);
1784 tscrollup(term.top, csiescseq.arg[0]);
1785 break;
1786 case 'T': /* SD -- Scroll <n> line down */
1787 DEFAULT(csiescseq.arg[0], 1);
1788 tscrolldown(term.top, csiescseq.arg[0]);
1789 break;
1790 case 'L': /* IL -- Insert <n> blank lines */
1791 DEFAULT(csiescseq.arg[0], 1);
1792 tinsertblankline(csiescseq.arg[0]);
1793 break;
1794 case 'l': /* RM -- Reset Mode */
1795 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1796 break;
1797 case 'M': /* DL -- Delete <n> lines */
1798 DEFAULT(csiescseq.arg[0], 1);
1799 tdeleteline(csiescseq.arg[0]);
1800 break;
1801 case 'X': /* ECH -- Erase <n> char */
1802 DEFAULT(csiescseq.arg[0], 1);
1803 tclearregion(term.c.x, term.c.y,
1804 term.c.x + csiescseq.arg[0] - 1, term.c.y, 1);
1805 break;
1806 case 'P': /* DCH -- Delete <n> char */
1807 DEFAULT(csiescseq.arg[0], 1);
1808 tdeletechar(csiescseq.arg[0]);
1809 break;
1810 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1811 DEFAULT(csiescseq.arg[0], 1);
1812 while(csiescseq.arg[0]--)
1813 tputtab(0);
1814 break;
1815 case 'd': /* VPA -- Move to <row> */
1816 DEFAULT(csiescseq.arg[0], 1);
1817 tmoveato(term.c.x, csiescseq.arg[0]-1);
1818 break;
1819 case 'h': /* SM -- Set terminal mode */
1820 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1821 break;
1822 case 'm': /* SGR -- Terminal attribute (color) */
1823 tsetattr(csiescseq.arg, csiescseq.narg);
1824 break;
1825 case 'r': /* DECSTBM -- Set Scrolling Region */
1826 if(csiescseq.priv) {
1827 goto unknown;
1828 } else {
1829 DEFAULT(csiescseq.arg[0], 1);
1830 DEFAULT(csiescseq.arg[1], term.row);
1831 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1832 tmoveato(0, 0);
1833 }
1834 break;
1835 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1836 tcursor(CURSOR_SAVE);
1837 break;
1838 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1839 tcursor(CURSOR_LOAD);
1840 break;
1841 }
1842 }
1843
1844 void
1845 csidump(void) {
1846 int i;
1847 uint c;
1848
1849 printf("ESC[");
1850 for(i = 0; i < csiescseq.len; i++) {
1851 c = csiescseq.buf[i] & 0xff;
1852 if(isprint(c)) {
1853 putchar(c);
1854 } else if(c == '\n') {
1855 printf("(\\n)");
1856 } else if(c == '\r') {
1857 printf("(\\r)");
1858 } else if(c == 0x1b) {
1859 printf("(\\e)");
1860 } else {
1861 printf("(%02x)", c);
1862 }
1863 }
1864 putchar('\n');
1865 }
1866
1867 void
1868 csireset(void) {
1869 memset(&csiescseq, 0, sizeof(csiescseq));
1870 }
1871
1872 void
1873 strhandle(void) {
1874 char *p = NULL;
1875 int i, j, narg;
1876
1877 strparse();
1878 narg = strescseq.narg;
1879
1880 switch(strescseq.type) {
1881 case ']': /* OSC -- Operating System Command */
1882 switch(i = atoi(strescseq.args[0])) {
1883 case 0:
1884 case 1:
1885 case 2:
1886 if(narg > 1)
1887 xsettitle(strescseq.args[1]);
1888 break;
1889 case 4: /* color set */
1890 if(narg < 3)
1891 break;
1892 p = strescseq.args[2];
1893 /* fall through */
1894 case 104: /* color reset, here p = NULL */
1895 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
1896 if (!xsetcolorname(j, p)) {
1897 fprintf(stderr, "erresc: invalid color %s\n", p);
1898 } else {
1899 /*
1900 * TODO if defaultbg color is changed, borders
1901 * are dirty
1902 */
1903 redraw(0);
1904 }
1905 break;
1906 default:
1907 fprintf(stderr, "erresc: unknown str ");
1908 strdump();
1909 break;
1910 }
1911 break;
1912 case 'k': /* old title set compatibility */
1913 xsettitle(strescseq.args[0]);
1914 break;
1915 case 'P': /* DSC -- Device Control String */
1916 case '_': /* APC -- Application Program Command */
1917 case '^': /* PM -- Privacy Message */
1918 default:
1919 fprintf(stderr, "erresc: unknown str ");
1920 strdump();
1921 /* die(""); */
1922 break;
1923 }
1924 }
1925
1926 void
1927 strparse(void) {
1928 char *p = strescseq.buf, *sp;
1929
1930 strescseq.buf[strescseq.len] = '\0';
1931 for(p = strtok_r(p, ";", &sp); p; p = strtok_r(NULL, ";", &sp)) {
1932 if(strescseq.narg == STR_ARG_SIZ)
1933 return;
1934 strescseq.args[strescseq.narg++] = p;
1935 }
1936 }
1937
1938 void
1939 strdump(void) {
1940 int i;
1941 uint c;
1942
1943 printf("ESC%c", strescseq.type);
1944 for(i = 0; i < strescseq.len; i++) {
1945 c = strescseq.buf[i] & 0xff;
1946 if(c == '\0') {
1947 return;
1948 } else if(isprint(c)) {
1949 putchar(c);
1950 } else if(c == '\n') {
1951 printf("(\\n)");
1952 } else if(c == '\r') {
1953 printf("(\\r)");
1954 } else if(c == 0x1b) {
1955 printf("(\\e)");
1956 } else {
1957 printf("(%02x)", c);
1958 }
1959 }
1960 printf("ESC\\\n");
1961 }
1962
1963 void
1964 strreset(void) {
1965 memset(&strescseq, 0, sizeof(strescseq));
1966 }
1967
1968 void
1969 tputtab(bool forward) {
1970 uint x = term.c.x;
1971
1972 if(forward) {
1973 if(x == term.col)
1974 return;
1975 for(++x; x < term.col && !term.tabs[x]; ++x)
1976 /* nothing */ ;
1977 } else {
1978 if(x == 0)
1979 return;
1980 for(--x; x > 0 && !term.tabs[x]; --x)
1981 /* nothing */ ;
1982 }
1983 tmoveto(x, term.c.y);
1984 }
1985
1986 void
1987 techo(char *buf, int len) {
1988 for(; len > 0; buf++, len--) {
1989 char c = *buf;
1990
1991 if(c == '\033') { /* escape */
1992 tputc("^", 1);
1993 tputc("[", 1);
1994 } else if(c < '\x20') { /* control code */
1995 if(c != '\n' && c != '\r' && c != '\t') {
1996 c |= '\x40';
1997 tputc("^", 1);
1998 }
1999 tputc(&c, 1);
2000 } else {
2001 break;
2002 }
2003 }
2004 if(len)
2005 tputc(buf, len);
2006 }
2007
2008 void
2009 tputc(char *c, int len) {
2010 uchar ascii = *c;
2011 bool control = ascii < '\x20' || ascii == 0177;
2012
2013 if(iofd != -1) {
2014 if(xwrite(iofd, c, len) < 0) {
2015 fprintf(stderr, "Error writing in %s:%s\n",
2016 opt_io, strerror(errno));
2017 close(iofd);
2018 iofd = -1;
2019 }
2020 }
2021
2022 /*
2023 * STR sequences must be checked before anything else
2024 * because it can use some control codes as part of the sequence.
2025 */
2026 if(term.esc & ESC_STR) {
2027 switch(ascii) {
2028 case '\033':
2029 term.esc = ESC_START | ESC_STR_END;
2030 break;
2031 case '\a': /* backwards compatibility to xterm */
2032 term.esc = 0;
2033 strhandle();
2034 break;
2035 default:
2036 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2037 memmove(&strescseq.buf[strescseq.len], c, len);
2038 strescseq.len += len;
2039 } else {
2040 /*
2041 * Here is a bug in terminals. If the user never sends
2042 * some code to stop the str or esc command, then st
2043 * will stop responding. But this is better than
2044 * silently failing with unknown characters. At least
2045 * then users will report back.
2046 *
2047 * In the case users ever get fixed, here is the code:
2048 */
2049 /*
2050 * term.esc = 0;
2051 * strhandle();
2052 */
2053 }
2054 }
2055 return;
2056 }
2057
2058 /*
2059 * Actions of control codes must be performed as soon they arrive
2060 * because they can be embedded inside a control sequence, and
2061 * they must not cause conflicts with sequences.
2062 */
2063 if(control) {
2064 switch(ascii) {
2065 case '\t': /* HT */
2066 tputtab(1);
2067 return;
2068 case '\b': /* BS */
2069 tmoveto(term.c.x-1, term.c.y);
2070 return;
2071 case '\r': /* CR */
2072 tmoveto(0, term.c.y);
2073 return;
2074 case '\f': /* LF */
2075 case '\v': /* VT */
2076 case '\n': /* LF */
2077 /* go to first col if the mode is set */
2078 tnewline(IS_SET(MODE_CRLF));
2079 return;
2080 case '\a': /* BEL */
2081 if(!(xw.state & WIN_FOCUSED))
2082 xseturgency(1);
2083 return;
2084 case '\033': /* ESC */
2085 csireset();
2086 term.esc = ESC_START;
2087 return;
2088 case '\016': /* SO */
2089 case '\017': /* SI */
2090 /*
2091 * Different charsets are hard to handle. Applications
2092 * should use the right alt charset escapes for the
2093 * only reason they still exist: line drawing. The
2094 * rest is incompatible history st should not support.
2095 */
2096 return;
2097 case '\032': /* SUB */
2098 case '\030': /* CAN */
2099 csireset();
2100 return;
2101 case '\005': /* ENQ (IGNORED) */
2102 case '\000': /* NUL (IGNORED) */
2103 case '\021': /* XON (IGNORED) */
2104 case '\023': /* XOFF (IGNORED) */
2105 case 0177: /* DEL (IGNORED) */
2106 return;
2107 }
2108 } else if(term.esc & ESC_START) {
2109 if(term.esc & ESC_CSI) {
2110 csiescseq.buf[csiescseq.len++] = ascii;
2111 if(BETWEEN(ascii, 0x40, 0x7E)
2112 || csiescseq.len >= ESC_BUF_SIZ) {
2113 term.esc = 0;
2114 csiparse();
2115 csihandle();
2116 }
2117 } else if(term.esc & ESC_STR_END) {
2118 term.esc = 0;
2119 if(ascii == '\\')
2120 strhandle();
2121 } else if(term.esc & ESC_ALTCHARSET) {
2122 switch(ascii) {
2123 case '0': /* Line drawing set */
2124 term.c.attr.mode |= ATTR_GFX;
2125 break;
2126 case 'B': /* USASCII */
2127 term.c.attr.mode &= ~ATTR_GFX;
2128 break;
2129 case 'A': /* UK (IGNORED) */
2130 case '<': /* multinational charset (IGNORED) */
2131 case '5': /* Finnish (IGNORED) */
2132 case 'C': /* Finnish (IGNORED) */
2133 case 'K': /* German (IGNORED) */
2134 break;
2135 default:
2136 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2137 }
2138 term.esc = 0;
2139 } else if(term.esc & ESC_TEST) {
2140 if(ascii == '8') { /* DEC screen alignment test. */
2141 char E[UTF_SIZ] = "E";
2142 int x, y;
2143
2144 for(x = 0; x < term.col; ++x) {
2145 for(y = 0; y < term.row; ++y)
2146 tsetchar(E, &term.c.attr, x, y);
2147 }
2148 }
2149 term.esc = 0;
2150 } else {
2151 switch(ascii) {
2152 case '[':
2153 term.esc |= ESC_CSI;
2154 break;
2155 case '#':
2156 term.esc |= ESC_TEST;
2157 break;
2158 case 'P': /* DCS -- Device Control String */
2159 case '_': /* APC -- Application Program Command */
2160 case '^': /* PM -- Privacy Message */
2161 case ']': /* OSC -- Operating System Command */
2162 case 'k': /* old title set compatibility */
2163 strreset();
2164 strescseq.type = ascii;
2165 term.esc |= ESC_STR;
2166 break;
2167 case '(': /* set primary charset G0 */
2168 term.esc |= ESC_ALTCHARSET;
2169 break;
2170 case ')': /* set secondary charset G1 (IGNORED) */
2171 case '*': /* set tertiary charset G2 (IGNORED) */
2172 case '+': /* set quaternary charset G3 (IGNORED) */
2173 term.esc = 0;
2174 break;
2175 case 'D': /* IND -- Linefeed */
2176 if(term.c.y == term.bot) {
2177 tscrollup(term.top, 1);
2178 } else {
2179 tmoveto(term.c.x, term.c.y+1);
2180 }
2181 term.esc = 0;
2182 break;
2183 case 'E': /* NEL -- Next line */
2184 tnewline(1); /* always go to first col */
2185 term.esc = 0;
2186 break;
2187 case 'H': /* HTS -- Horizontal tab stop */
2188 term.tabs[term.c.x] = 1;
2189 term.esc = 0;
2190 break;
2191 case 'M': /* RI -- Reverse index */
2192 if(term.c.y == term.top) {
2193 tscrolldown(term.top, 1);
2194 } else {
2195 tmoveto(term.c.x, term.c.y-1);
2196 }
2197 term.esc = 0;
2198 break;
2199 case 'Z': /* DECID -- Identify Terminal */
2200 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2201 term.esc = 0;
2202 break;
2203 case 'c': /* RIS -- Reset to inital state */
2204 treset();
2205 term.esc = 0;
2206 xresettitle();
2207 break;
2208 case '=': /* DECPAM -- Application keypad */
2209 term.mode |= MODE_APPKEYPAD;
2210 term.esc = 0;
2211 break;
2212 case '>': /* DECPNM -- Normal keypad */
2213 term.mode &= ~MODE_APPKEYPAD;
2214 term.esc = 0;
2215 break;
2216 case '7': /* DECSC -- Save Cursor */
2217 tcursor(CURSOR_SAVE);
2218 term.esc = 0;
2219 break;
2220 case '8': /* DECRC -- Restore Cursor */
2221 tcursor(CURSOR_LOAD);
2222 term.esc = 0;
2223 break;
2224 case '\\': /* ST -- Stop */
2225 term.esc = 0;
2226 break;
2227 default:
2228 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2229 (uchar) ascii, isprint(ascii)? ascii:'.');
2230 term.esc = 0;
2231 }
2232 }
2233 /*
2234 * All characters which form part of a sequence are not
2235 * printed
2236 */
2237 return;
2238 }
2239 /*
2240 * Display control codes only if we are in graphic mode
2241 */
2242 if(control && !(term.c.attr.mode & ATTR_GFX))
2243 return;
2244 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2245 sel.bx = -1;
2246 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2247 tnewline(1); /* always go to first col */
2248
2249 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2250 memmove(&term.line[term.c.y][term.c.x+1],
2251 &term.line[term.c.y][term.c.x],
2252 (term.col - term.c.x - 1) * sizeof(Glyph));
2253 }
2254
2255 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2256 if(term.c.x+1 < term.col) {
2257 tmoveto(term.c.x+1, term.c.y);
2258 } else {
2259 term.c.state |= CURSOR_WRAPNEXT;
2260 }
2261 }
2262
2263 int
2264 tresize(int col, int row) {
2265 int i, x;
2266 int minrow = MIN(row, term.row);
2267 int mincol = MIN(col, term.col);
2268 int slide = term.c.y - row + 1;
2269 bool *bp;
2270
2271 if(col < 1 || row < 1)
2272 return 0;
2273
2274 /* free unneeded rows */
2275 i = 0;
2276 if(slide > 0) {
2277 /*
2278 * slide screen to keep cursor where we expect it -
2279 * tscrollup would work here, but we can optimize to
2280 * memmove because we're freeing the earlier lines
2281 */
2282 for(/* i = 0 */; i < slide; i++) {
2283 free(term.line[i]);
2284 free(term.alt[i]);
2285 }
2286 memmove(term.line, term.line + slide, row * sizeof(Line));
2287 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2288 }
2289 for(i += row; i < term.row; i++) {
2290 free(term.line[i]);
2291 free(term.alt[i]);
2292 }
2293
2294 /* resize to new height */
2295 term.line = xrealloc(term.line, row * sizeof(Line));
2296 term.alt = xrealloc(term.alt, row * sizeof(Line));
2297 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2298 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2299
2300 /* resize each row to new width, zero-pad if needed */
2301 for(i = 0; i < minrow; i++) {
2302 term.dirty[i] = 1;
2303 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2304 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2305 for(x = mincol; x < col; x++) {
2306 term.line[i][x].state = 0;
2307 term.alt[i][x].state = 0;
2308 }
2309 }
2310
2311 /* allocate any new rows */
2312 for(/* i == minrow */; i < row; i++) {
2313 term.dirty[i] = 1;
2314 term.line[i] = xcalloc(col, sizeof(Glyph));
2315 term.alt [i] = xcalloc(col, sizeof(Glyph));
2316 }
2317 if(col > term.col) {
2318 bp = term.tabs + term.col;
2319
2320 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2321 while(--bp > term.tabs && !*bp)
2322 /* nothing */ ;
2323 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2324 *bp = 1;
2325 }
2326 /* update terminal size */
2327 term.col = col;
2328 term.row = row;
2329 /* reset scrolling region */
2330 tsetscroll(0, row-1);
2331 /* make use of the LIMIT in tmoveto */
2332 tmoveto(term.c.x, term.c.y);
2333
2334 return (slide > 0);
2335 }
2336
2337 void
2338 xresize(int col, int row) {
2339 xw.tw = MAX(1, col * xw.cw);
2340 xw.th = MAX(1, row * xw.ch);
2341
2342 XFreePixmap(xw.dpy, xw.buf);
2343 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2344 DefaultDepth(xw.dpy, xw.scr));
2345 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg].pixel);
2346 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2347
2348 XftDrawChange(xw.draw, xw.buf);
2349 }
2350
2351 static inline ushort
2352 sixd_to_16bit(int x) {
2353 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2354 }
2355
2356 void
2357 xloadcols(void) {
2358 int i, r, g, b;
2359 XRenderColor color = { .alpha = 0xffff };
2360
2361 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2362 for(i = 0; i < LEN(colorname); i++) {
2363 if(!colorname[i])
2364 continue;
2365 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2366 die("Could not allocate color '%s'\n", colorname[i]);
2367 }
2368 }
2369
2370 /* load colors [16-255] ; same colors as xterm */
2371 for(i = 16, r = 0; r < 6; r++) {
2372 for(g = 0; g < 6; g++) {
2373 for(b = 0; b < 6; b++) {
2374 color.red = sixd_to_16bit(r);
2375 color.green = sixd_to_16bit(g);
2376 color.blue = sixd_to_16bit(b);
2377 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2378 die("Could not allocate color %d\n", i);
2379 }
2380 i++;
2381 }
2382 }
2383 }
2384
2385 for(r = 0; r < 24; r++, i++) {
2386 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2387 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2388 &dc.col[i])) {
2389 die("Could not allocate color %d\n", i);
2390 }
2391 }
2392 }
2393
2394 int
2395 xsetcolorname(int x, const char *name) {
2396 XRenderColor color = { .alpha = 0xffff };
2397 Colour colour;
2398 if (x < 0 || x > LEN(colorname))
2399 return -1;
2400 if(!name) {
2401 if(16 <= x && x < 16 + 216) {
2402 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2403 color.red = sixd_to_16bit(r);
2404 color.green = sixd_to_16bit(g);
2405 color.blue = sixd_to_16bit(b);
2406 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2407 return 0; /* something went wrong */
2408 dc.col[x] = colour;
2409 return 1;
2410 } else if (16 + 216 <= x && x < 256) {
2411 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2412 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2413 return 0; /* something went wrong */
2414 dc.col[x] = colour;
2415 return 1;
2416 } else {
2417 name = colorname[x];
2418 }
2419 }
2420 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2421 return 0;
2422 dc.col[x] = colour;
2423 return 1;
2424 }
2425
2426 void
2427 xtermclear(int col1, int row1, int col2, int row2) {
2428 XftDrawRect(xw.draw,
2429 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2430 borderpx + col1 * xw.cw,
2431 borderpx + row1 * xw.ch,
2432 (col2-col1+1) * xw.cw,
2433 (row2-row1+1) * xw.ch);
2434 }
2435
2436 /*
2437 * Absolute coordinates.
2438 */
2439 void
2440 xclear(int x1, int y1, int x2, int y2) {
2441 XftDrawRect(xw.draw,
2442 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2443 x1, y1, x2-x1, y2-y1);
2444 }
2445
2446 void
2447 xhints(void) {
2448 XClassHint class = {opt_class ? opt_class : termname, termname};
2449 XWMHints wm = {.flags = InputHint, .input = 1};
2450 XSizeHints *sizeh = NULL;
2451
2452 sizeh = XAllocSizeHints();
2453 if(xw.isfixed == False) {
2454 sizeh->flags = PSize | PResizeInc | PBaseSize;
2455 sizeh->height = xw.h;
2456 sizeh->width = xw.w;
2457 sizeh->height_inc = xw.ch;
2458 sizeh->width_inc = xw.cw;
2459 sizeh->base_height = 2 * borderpx;
2460 sizeh->base_width = 2 * borderpx;
2461 } else {
2462 sizeh->flags = PMaxSize | PMinSize;
2463 sizeh->min_width = sizeh->max_width = xw.fw;
2464 sizeh->min_height = sizeh->max_height = xw.fh;
2465 }
2466
2467 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2468 XFree(sizeh);
2469 }
2470
2471 int
2472 xloadfont(Font *f, FcPattern *pattern) {
2473 FcPattern *match;
2474 FcResult result;
2475
2476 match = FcFontMatch(NULL, pattern, &result);
2477 if(!match)
2478 return 1;
2479
2480 if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
2481 FcPatternDestroy(match);
2482 return 1;
2483 }
2484
2485 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2486 FcPatternDestroy(match);
2487 return 1;
2488 }
2489
2490 f->pattern = FcPatternDuplicate(pattern);
2491
2492 f->ascent = f->match->ascent;
2493 f->descent = f->match->descent;
2494 f->lbearing = 0;
2495 f->rbearing = f->match->max_advance_width;
2496
2497 f->height = f->match->height;
2498 f->width = f->lbearing + f->rbearing;
2499
2500 return 0;
2501 }
2502
2503 void
2504 xloadfonts(char *fontstr, int fontsize) {
2505 FcPattern *pattern;
2506 FcResult result;
2507 double fontval;
2508
2509 if(fontstr[0] == '-') {
2510 pattern = XftXlfdParse(fontstr, False, False);
2511 } else {
2512 pattern = FcNameParse((FcChar8 *)fontstr);
2513 }
2514
2515 if(!pattern)
2516 die("st: can't open font %s\n", fontstr);
2517
2518 if(fontsize > 0) {
2519 FcPatternDel(pattern, FC_PIXEL_SIZE);
2520 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2521 usedfontsize = fontsize;
2522 } else {
2523 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2524 if(result == FcResultMatch) {
2525 usedfontsize = (int)fontval;
2526 } else {
2527 /*
2528 * Default font size is 12, if none given. This is to
2529 * have a known usedfontsize value.
2530 */
2531 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2532 usedfontsize = 12;
2533 }
2534 }
2535
2536 FcConfigSubstitute(0, pattern, FcMatchPattern);
2537 FcDefaultSubstitute(pattern);
2538
2539 if(xloadfont(&dc.font, pattern))
2540 die("st: can't open font %s\n", fontstr);
2541
2542 /* Setting character width and height. */
2543 xw.cw = dc.font.width;
2544 xw.ch = dc.font.height;
2545
2546 FcPatternDel(pattern, FC_SLANT);
2547 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2548 if(xloadfont(&dc.ifont, pattern))
2549 die("st: can't open font %s\n", fontstr);
2550
2551 FcPatternDel(pattern, FC_WEIGHT);
2552 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2553 if(xloadfont(&dc.ibfont, pattern))
2554 die("st: can't open font %s\n", fontstr);
2555
2556 FcPatternDel(pattern, FC_SLANT);
2557 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2558 if(xloadfont(&dc.bfont, pattern))
2559 die("st: can't open font %s\n", fontstr);
2560
2561 FcPatternDestroy(pattern);
2562 }
2563
2564 void
2565 xunloadfonts(void) {
2566 int i, ip;
2567
2568 /*
2569 * Free the loaded fonts in the font cache. This is done backwards
2570 * from the frccur.
2571 */
2572 for(i = 0, ip = frccur; i < frclen; i++, ip--) {
2573 if(ip < 0)
2574 ip = LEN(frc) - 1;
2575 XftFontClose(xw.dpy, frc[ip].font);
2576 }
2577 frccur = -1;
2578 frclen = 0;
2579
2580 XftFontClose(xw.dpy, dc.font.match);
2581 FcPatternDestroy(dc.font.pattern);
2582 FcFontSetDestroy(dc.font.set);
2583 XftFontClose(xw.dpy, dc.bfont.match);
2584 FcPatternDestroy(dc.bfont.pattern);
2585 FcFontSetDestroy(dc.bfont.set);
2586 XftFontClose(xw.dpy, dc.ifont.match);
2587 FcPatternDestroy(dc.ifont.pattern);
2588 FcFontSetDestroy(dc.ifont.set);
2589 XftFontClose(xw.dpy, dc.ibfont.match);
2590 FcPatternDestroy(dc.ibfont.pattern);
2591 FcFontSetDestroy(dc.ibfont.set);
2592 }
2593
2594 void
2595 xzoom(const Arg *arg) {
2596 xunloadfonts();
2597 xloadfonts(usedfont, usedfontsize + arg->i);
2598 cresize(0, 0);
2599 redraw(0);
2600 }
2601
2602 void
2603 xinit(void) {
2604 XSetWindowAttributes attrs;
2605 XGCValues gcvalues;
2606 Cursor cursor;
2607 Window parent;
2608 int sw, sh;
2609
2610 if(!(xw.dpy = XOpenDisplay(NULL)))
2611 die("Can't open display\n");
2612 xw.scr = XDefaultScreen(xw.dpy);
2613 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2614
2615 /* font */
2616 if(!FcInit())
2617 die("Could not init fontconfig.\n");
2618
2619 usedfont = (opt_font == NULL)? font : opt_font;
2620 xloadfonts(usedfont, 0);
2621
2622 /* colors */
2623 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2624 xloadcols();
2625
2626 /* adjust fixed window geometry */
2627 if(xw.isfixed) {
2628 sw = DisplayWidth(xw.dpy, xw.scr);
2629 sh = DisplayHeight(xw.dpy, xw.scr);
2630 if(xw.fx < 0)
2631 xw.fx = sw + xw.fx - xw.fw - 1;
2632 if(xw.fy < 0)
2633 xw.fy = sh + xw.fy - xw.fh - 1;
2634
2635 xw.h = xw.fh;
2636 xw.w = xw.fw;
2637 } else {
2638 /* window - default size */
2639 xw.h = 2 * borderpx + term.row * xw.ch;
2640 xw.w = 2 * borderpx + term.col * xw.cw;
2641 xw.fx = 0;
2642 xw.fy = 0;
2643 }
2644
2645 /* Events */
2646 attrs.background_pixel = dc.col[defaultbg].pixel;
2647 attrs.border_pixel = dc.col[defaultbg].pixel;
2648 attrs.bit_gravity = NorthWestGravity;
2649 attrs.event_mask = FocusChangeMask | KeyPressMask
2650 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2651 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2652 attrs.colormap = xw.cmap;
2653
2654 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2655 XRootWindow(xw.dpy, xw.scr);
2656 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2657 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2658 xw.vis,
2659 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2660 | CWColormap,
2661 &attrs);
2662
2663 memset(&gcvalues, 0, sizeof(gcvalues));
2664 gcvalues.graphics_exposures = False;
2665 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2666 &gcvalues);
2667 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2668 DefaultDepth(xw.dpy, xw.scr));
2669 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2670 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2671
2672 /* Xft rendering context */
2673 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2674
2675 /* input methods */
2676 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2677 XSetLocaleModifiers("@im=local");
2678 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2679 XSetLocaleModifiers("@im=");
2680 if((xw.xim = XOpenIM(xw.dpy,
2681 NULL, NULL, NULL)) == NULL) {
2682 die("XOpenIM failed. Could not open input"
2683 " device.\n");
2684 }
2685 }
2686 }
2687 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2688 | XIMStatusNothing, XNClientWindow, xw.win,
2689 XNFocusWindow, xw.win, NULL);
2690 if(xw.xic == NULL)
2691 die("XCreateIC failed. Could not obtain input method.\n");
2692
2693 /* white cursor, black outline */
2694 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2695 XDefineCursor(xw.dpy, xw.win, cursor);
2696 XRecolorCursor(xw.dpy, cursor,
2697 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2698 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2699
2700 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2701 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2702 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2703
2704 xresettitle();
2705 XMapWindow(xw.dpy, xw.win);
2706 xhints();
2707 XSync(xw.dpy, 0);
2708 }
2709
2710 void
2711 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2712 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2713 width = charlen * xw.cw, xp, i;
2714 int frp, frcflags;
2715 int u8fl, u8fblen, u8cblen, doesexist;
2716 char *u8c, *u8fs;
2717 long u8char;
2718 Font *font = &dc.font;
2719 FcResult fcres;
2720 FcPattern *fcpattern, *fontpattern;
2721 FcFontSet *fcsets[] = { NULL };
2722 FcCharSet *fccharset;
2723 Colour *fg = &dc.col[base.fg], *bg = &dc.col[base.bg],
2724 *temp, revfg, revbg;
2725 XRenderColor colfg, colbg;
2726
2727 frcflags = FRC_NORMAL;
2728
2729 if(base.mode & ATTR_BOLD) {
2730 if(BETWEEN(base.fg, 0, 7)) {
2731 /* basic system colors */
2732 fg = &dc.col[base.fg + 8];
2733 } else if(BETWEEN(base.fg, 16, 195)) {
2734 /* 256 colors */
2735 fg = &dc.col[base.fg + 36];
2736 } else if(BETWEEN(base.fg, 232, 251)) {
2737 /* greyscale */
2738 fg = &dc.col[base.fg + 4];
2739 }
2740 /*
2741 * Those ranges will not be brightened:
2742 * 8 - 15 – bright system colors
2743 * 196 - 231 – highest 256 color cube
2744 * 252 - 255 – brightest colors in greyscale
2745 */
2746 font = &dc.bfont;
2747 frcflags = FRC_BOLD;
2748 }
2749
2750 if(base.mode & ATTR_ITALIC) {
2751 font = &dc.ifont;
2752 frcflags = FRC_ITALIC;
2753 }
2754 if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2755 font = &dc.ibfont;
2756 frcflags = FRC_ITALICBOLD;
2757 }
2758
2759 if(IS_SET(MODE_REVERSE)) {
2760 if(fg == &dc.col[defaultfg]) {
2761 fg = &dc.col[defaultbg];
2762 } else {
2763 colfg.red = ~fg->color.red;
2764 colfg.green = ~fg->color.green;
2765 colfg.blue = ~fg->color.blue;
2766 colfg.alpha = fg->color.alpha;
2767 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2768 fg = &revfg;
2769 }
2770
2771 if(bg == &dc.col[defaultbg]) {
2772 bg = &dc.col[defaultfg];
2773 } else {
2774 colbg.red = ~bg->color.red;
2775 colbg.green = ~bg->color.green;
2776 colbg.blue = ~bg->color.blue;
2777 colbg.alpha = bg->color.alpha;
2778 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2779 bg = &revbg;
2780 }
2781 }
2782
2783 if(base.mode & ATTR_REVERSE) {
2784 temp = fg;
2785 fg = bg;
2786 bg = temp;
2787 }
2788
2789 /* Intelligent cleaning up of the borders. */
2790 if(x == 0) {
2791 xclear(0, (y == 0)? 0 : winy, borderpx,
2792 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2793 }
2794 if(x + charlen >= term.col) {
2795 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2796 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2797 }
2798 if(y == 0)
2799 xclear(winx, 0, winx + width, borderpx);
2800 if(y == term.row-1)
2801 xclear(winx, winy + xw.ch, winx + width, xw.h);
2802
2803 /* Clean up the region we want to draw to. */
2804 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2805
2806 fcsets[0] = font->set;
2807 for(xp = winx; bytelen > 0;) {
2808 /*
2809 * Search for the range in the to be printed string of glyphs
2810 * that are in the main font. Then print that range. If
2811 * some glyph is found that is not in the font, do the
2812 * fallback dance.
2813 */
2814 u8fs = s;
2815 u8fblen = 0;
2816 u8fl = 0;
2817 for(;;) {
2818 u8c = s;
2819 u8cblen = utf8decode(s, &u8char);
2820 s += u8cblen;
2821 bytelen -= u8cblen;
2822
2823 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
2824 if(!doesexist || bytelen <= 0) {
2825 if(bytelen <= 0) {
2826 if(doesexist) {
2827 u8fl++;
2828 u8fblen += u8cblen;
2829 }
2830 }
2831
2832 if(u8fl > 0) {
2833 XftDrawStringUtf8(xw.draw, fg,
2834 font->match, xp,
2835 winy + font->ascent,
2836 (FcChar8 *)u8fs,
2837 u8fblen);
2838 xp += font->width * u8fl;
2839 }
2840 break;
2841 }
2842
2843 u8fl++;
2844 u8fblen += u8cblen;
2845 }
2846 if(doesexist)
2847 break;
2848
2849 frp = frccur;
2850 /* Search the font cache. */
2851 for(i = 0; i < frclen; i++, frp--) {
2852 if(frp <= 0)
2853 frp = LEN(frc) - 1;
2854
2855 if(frc[frp].c == u8char
2856 && frc[frp].flags == frcflags) {
2857 break;
2858 }
2859 }
2860
2861 /* Nothing was found. */
2862 if(i >= frclen) {
2863 /*
2864 * Nothing was found in the cache. Now use
2865 * some dozen of Fontconfig calls to get the
2866 * font for one single character.
2867 */
2868 fcpattern = FcPatternDuplicate(font->pattern);
2869 fccharset = FcCharSetCreate();
2870
2871 FcCharSetAddChar(fccharset, u8char);
2872 FcPatternAddCharSet(fcpattern, FC_CHARSET,
2873 fccharset);
2874 FcPatternAddBool(fcpattern, FC_SCALABLE,
2875 FcTrue);
2876
2877 FcConfigSubstitute(0, fcpattern,
2878 FcMatchPattern);
2879 FcDefaultSubstitute(fcpattern);
2880
2881 fontpattern = FcFontSetMatch(0, fcsets,
2882 FcTrue, fcpattern, &fcres);
2883
2884 /*
2885 * Overwrite or create the new cache entry
2886 * entry.
2887 */
2888 frccur++;
2889 frclen++;
2890 if(frccur >= LEN(frc))
2891 frccur = 0;
2892 if(frclen > LEN(frc)) {
2893 frclen = LEN(frc);
2894 XftFontClose(xw.dpy, frc[frccur].font);
2895 }
2896
2897 frc[frccur].font = XftFontOpenPattern(xw.dpy,
2898 fontpattern);
2899 frc[frccur].c = u8char;
2900 frc[frccur].flags = frcflags;
2901
2902 FcPatternDestroy(fcpattern);
2903 FcCharSetDestroy(fccharset);
2904
2905 frp = frccur;
2906 }
2907
2908 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
2909 xp, winy + frc[frp].font->ascent,
2910 (FcChar8 *)u8c, u8cblen);
2911
2912 xp += font->width;
2913 }
2914
2915 /*
2916 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
2917 winy + font->ascent, (FcChar8 *)s, bytelen);
2918 */
2919
2920 if(base.mode & ATTR_UNDERLINE) {
2921 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
2922 width, 1);
2923 }
2924 }
2925
2926 void
2927 xdrawcursor(void) {
2928 static int oldx = 0, oldy = 0;
2929 int sl;
2930 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs, 0};
2931
2932 LIMIT(oldx, 0, term.col-1);
2933 LIMIT(oldy, 0, term.row-1);
2934
2935 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2936 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2937
2938 /* remove the old cursor */
2939 if(term.line[oldy][oldx].state & GLYPH_SET) {
2940 sl = utf8size(term.line[oldy][oldx].c);
2941 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2942 oldy, 1, sl);
2943 } else {
2944 xtermclear(oldx, oldy, oldx, oldy);
2945 }
2946
2947 /* draw the new one */
2948 if(!(IS_SET(MODE_HIDE))) {
2949 if(!(xw.state & WIN_FOCUSED))
2950 g.bg = defaultucs;
2951
2952 if(IS_SET(MODE_REVERSE))
2953 g.mode |= ATTR_REVERSE, g.fg = defaultcs, g.bg = defaultfg;
2954
2955 sl = utf8size(g.c);
2956 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2957 oldx = term.c.x, oldy = term.c.y;
2958 }
2959 }
2960
2961
2962 void
2963 xsettitle(char *p) {
2964 XTextProperty prop;
2965
2966 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
2967 &prop);
2968 XSetWMName(xw.dpy, xw.win, &prop);
2969 }
2970
2971 void
2972 xresettitle(void) {
2973 xsettitle(opt_title ? opt_title : "st");
2974 }
2975
2976 void
2977 redraw(int timeout) {
2978 struct timespec tv = {0, timeout * 1000};
2979
2980 tfulldirt();
2981 draw();
2982
2983 if(timeout > 0) {
2984 nanosleep(&tv, NULL);
2985 XSync(xw.dpy, False); /* necessary for a good tput flash */
2986 }
2987 }
2988
2989 void
2990 draw(void) {
2991 drawregion(0, 0, term.col, term.row);
2992 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
2993 xw.h, 0, 0);
2994 XSetForeground(xw.dpy, dc.gc,
2995 dc.col[IS_SET(MODE_REVERSE)?
2996 defaultfg : defaultbg].pixel);
2997 }
2998
2999 void
3000 drawregion(int x1, int y1, int x2, int y2) {
3001 int ic, ib, x, y, ox, sl;
3002 Glyph base, new;
3003 char buf[DRAW_BUF_SIZ];
3004 bool ena_sel = sel.bx != -1;
3005
3006 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3007 ena_sel = 0;
3008
3009 if(!(xw.state & WIN_VISIBLE))
3010 return;
3011
3012 for(y = y1; y < y2; y++) {
3013 if(!term.dirty[y])
3014 continue;
3015
3016 xtermclear(0, y, term.col, y);
3017 term.dirty[y] = 0;
3018 base = term.line[y][0];
3019 ic = ib = ox = 0;
3020 for(x = x1; x < x2; x++) {
3021 new = term.line[y][x];
3022 if(ena_sel && *(new.c) && selected(x, y))
3023 new.mode ^= ATTR_REVERSE;
3024 if(ib > 0 && (!(new.state & GLYPH_SET)
3025 || ATTRCMP(base, new)
3026 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3027 xdraws(buf, base, ox, y, ic, ib);
3028 ic = ib = 0;
3029 }
3030 if(new.state & GLYPH_SET) {
3031 if(ib == 0) {
3032 ox = x;
3033 base = new;
3034 }
3035
3036 sl = utf8size(new.c);
3037 memcpy(buf+ib, new.c, sl);
3038 ib += sl;
3039 ++ic;
3040 }
3041 }
3042 if(ib > 0)
3043 xdraws(buf, base, ox, y, ic, ib);
3044 }
3045 xdrawcursor();
3046 }
3047
3048 void
3049 expose(XEvent *ev) {
3050 XExposeEvent *e = &ev->xexpose;
3051
3052 if(xw.state & WIN_REDRAW) {
3053 if(!e->count)
3054 xw.state &= ~WIN_REDRAW;
3055 }
3056 redraw(0);
3057 }
3058
3059 void
3060 visibility(XEvent *ev) {
3061 XVisibilityEvent *e = &ev->xvisibility;
3062
3063 if(e->state == VisibilityFullyObscured) {
3064 xw.state &= ~WIN_VISIBLE;
3065 } else if(!(xw.state & WIN_VISIBLE)) {
3066 /* need a full redraw for next Expose, not just a buf copy */
3067 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3068 }
3069 }
3070
3071 void
3072 unmap(XEvent *ev) {
3073 xw.state &= ~WIN_VISIBLE;
3074 }
3075
3076 void
3077 xseturgency(int add) {
3078 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3079
3080 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3081 XSetWMHints(xw.dpy, xw.win, h);
3082 XFree(h);
3083 }
3084
3085 void
3086 focus(XEvent *ev) {
3087 XFocusChangeEvent *e = &ev->xfocus;
3088
3089 if(e->mode == NotifyGrab)
3090 return;
3091
3092 if(ev->type == FocusIn) {
3093 XSetICFocus(xw.xic);
3094 xw.state |= WIN_FOCUSED;
3095 xseturgency(0);
3096 } else {
3097 XUnsetICFocus(xw.xic);
3098 xw.state &= ~WIN_FOCUSED;
3099 }
3100 }
3101
3102 inline bool
3103 match(uint mask, uint state) {
3104 state &= ~(ignoremod);
3105
3106 if(mask == XK_NO_MOD && state)
3107 return false;
3108 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3109 return false;
3110 if((state & mask) != state)
3111 return false;
3112 return true;
3113 }
3114
3115 void
3116 numlock(const Arg *dummy) {
3117 term.numlock ^= 1;
3118 }
3119
3120 char*
3121 kmap(KeySym k, uint state) {
3122 uint mask;
3123 Key *kp;
3124 int i;
3125
3126 /* Check for mapped keys out of X11 function keys. */
3127 for(i = 0; i < LEN(mappedkeys); i++) {
3128 if(mappedkeys[i] == k)
3129 break;
3130 }
3131 if(i == LEN(mappedkeys)) {
3132 if((k & 0xFFFF) < 0xFD00)
3133 return NULL;
3134 }
3135
3136 for(kp = key; kp < key + LEN(key); kp++) {
3137 mask = kp->mask;
3138
3139 if(kp->k != k)
3140 continue;
3141
3142 if(!match(mask, state))
3143 continue;
3144
3145 if(kp->appkey > 0) {
3146 if(!IS_SET(MODE_APPKEYPAD))
3147 continue;
3148 if(term.numlock && kp->appkey == 2)
3149 continue;
3150 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3151 continue;
3152 }
3153
3154 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3155 (kp->appcursor > 0
3156 && !IS_SET(MODE_APPCURSOR))) {
3157 continue;
3158 }
3159
3160 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3161 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3162 continue;
3163 }
3164
3165 return kp->s;
3166 }
3167
3168 return NULL;
3169 }
3170
3171 void
3172 kpress(XEvent *ev) {
3173 XKeyEvent *e = &ev->xkey;
3174 KeySym ksym;
3175 char xstr[31], buf[32], *customkey, *cp = buf;
3176 int len;
3177 Status status;
3178 Shortcut *bp;
3179
3180 if(IS_SET(MODE_KBDLOCK))
3181 return;
3182
3183 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3184 e->state &= ~Mod2Mask;
3185 /* 1. shortcuts */
3186 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3187 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3188 bp->func(&(bp->arg));
3189 return;
3190 }
3191 }
3192
3193 /* 2. custom keys from config.h */
3194 if((customkey = kmap(ksym, e->state))) {
3195 len = strlen(customkey);
3196 memcpy(buf, customkey, len);
3197 /* 2. hardcoded (overrides X lookup) */
3198 } else {
3199 if(len == 0)
3200 return;
3201
3202 if(len == 1 && e->state & Mod1Mask)
3203 *cp++ = '\033';
3204
3205 memcpy(cp, xstr, len);
3206 len = cp - buf + len;
3207 }
3208
3209 ttywrite(buf, len);
3210 if(IS_SET(MODE_ECHO))
3211 techo(buf, len);
3212 }
3213
3214
3215 void
3216 cmessage(XEvent *e) {
3217 /*
3218 * See xembed specs
3219 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3220 */
3221 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3222 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3223 xw.state |= WIN_FOCUSED;
3224 xseturgency(0);
3225 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3226 xw.state &= ~WIN_FOCUSED;
3227 }
3228 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3229 /* Send SIGHUP to shell */
3230 kill(pid, SIGHUP);
3231 exit(EXIT_SUCCESS);
3232 }
3233 }
3234
3235 void
3236 cresize(int width, int height) {
3237 int col, row;
3238
3239 if(width != 0)
3240 xw.w = width;
3241 if(height != 0)
3242 xw.h = height;
3243
3244 col = (xw.w - 2 * borderpx) / xw.cw;
3245 row = (xw.h - 2 * borderpx) / xw.ch;
3246
3247 tresize(col, row);
3248 xresize(col, row);
3249 ttyresize();
3250 }
3251
3252 void
3253 resize(XEvent *e) {
3254 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3255 return;
3256
3257 cresize(e->xconfigure.width, e->xconfigure.height);
3258 }
3259
3260 void
3261 run(void) {
3262 XEvent ev;
3263 fd_set rfd;
3264 int xfd = XConnectionNumber(xw.dpy), xev;
3265 struct timeval drawtimeout, *tv = NULL, now, last;
3266
3267 gettimeofday(&last, NULL);
3268
3269 for(xev = actionfps;;) {
3270 FD_ZERO(&rfd);
3271 FD_SET(cmdfd, &rfd);
3272 FD_SET(xfd, &rfd);
3273 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3274 if(errno == EINTR)
3275 continue;
3276 die("select failed: %s\n", SERRNO);
3277 }
3278
3279 gettimeofday(&now, NULL);
3280 drawtimeout.tv_sec = 0;
3281 drawtimeout.tv_usec = (1000/xfps) * 1000;
3282 tv = &drawtimeout;
3283
3284 if(FD_ISSET(cmdfd, &rfd))
3285 ttyread();
3286
3287 if(FD_ISSET(xfd, &rfd))
3288 xev = actionfps;
3289
3290 if(TIMEDIFF(now, last) > \
3291 (xev ? (1000/xfps) : (1000/actionfps))) {
3292 while(XPending(xw.dpy)) {
3293 XNextEvent(xw.dpy, &ev);
3294 if(XFilterEvent(&ev, None))
3295 continue;
3296 if(handler[ev.type])
3297 (handler[ev.type])(&ev);
3298 }
3299
3300 draw();
3301 XFlush(xw.dpy);
3302 last = now;
3303
3304 if(xev && !FD_ISSET(xfd, &rfd))
3305 xev--;
3306 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd))
3307 tv = NULL;
3308 }
3309 }
3310 }
3311
3312 int
3313 main(int argc, char *argv[]) {
3314 int i, bitm, xr, yr;
3315 uint wr, hr;
3316
3317 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3318 xw.isfixed = False;
3319
3320 for(i = 1; i < argc; i++) {
3321 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
3322 case 'c':
3323 if(++i < argc)
3324 opt_class = argv[i];
3325 break;
3326 case 'e':
3327 /* eat all remaining arguments */
3328 if(++i < argc)
3329 opt_cmd = &argv[i];
3330 goto run;
3331 case 'f':
3332 if(++i < argc)
3333 opt_font = argv[i];
3334 break;
3335 case 'g':
3336 if(++i >= argc)
3337 break;
3338
3339 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
3340 if(bitm & XValue)
3341 xw.fx = xr;
3342 if(bitm & YValue)
3343 xw.fy = yr;
3344 if(bitm & WidthValue)
3345 xw.fw = (int)wr;
3346 if(bitm & HeightValue)
3347 xw.fh = (int)hr;
3348 if(bitm & XNegative && xw.fx == 0)
3349 xw.fx = -1;
3350 if(bitm & XNegative && xw.fy == 0)
3351 xw.fy = -1;
3352
3353 if(xw.fh != 0 && xw.fw != 0)
3354 xw.isfixed = True;
3355 break;
3356 case 'o':
3357 if(++i < argc)
3358 opt_io = argv[i];
3359 break;
3360 case 't':
3361 if(++i < argc)
3362 opt_title = argv[i];
3363 break;
3364 case 'v':
3365 default:
3366 die(USAGE);
3367 case 'w':
3368 if(++i < argc)
3369 opt_embed = argv[i];
3370 break;
3371 }
3372 }
3373
3374 run:
3375 setlocale(LC_CTYPE, "");
3376 XSetLocaleModifiers("");
3377 tnew(80, 24);
3378 xinit();
3379 ttynew();
3380 selinit();
3381 run();
3382
3383 return 0;
3384 }
3385