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Add DEC alignment test
[st.git] / st.c
blob693739e00f3f9110bbbf3f24931a7d64e7d9e872
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 <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <sys/ioctl.h>
15 #include <sys/select.h>
16 #include <sys/stat.h>
17 #include <sys/time.h>
18 #include <sys/types.h>
19 #include <sys/wait.h>
20 #include <time.h>
21 #include <unistd.h>
22 #include <X11/Xatom.h>
23 #include <X11/Xlib.h>
24 #include <X11/Xutil.h>
25 #include <X11/cursorfont.h>
26 #include <X11/keysym.h>
27 #include <X11/extensions/Xdbe.h>
28 #include <X11/Xft/Xft.h>
29 #include <fontconfig/fontconfig.h>
30 #define Glyph Glyph_
31 #define Font Font_
32
33 #if defined(__linux)
34 #include <pty.h>
35 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
36 #include <util.h>
37 #elif defined(__FreeBSD__) || defined(__DragonFly__)
38 #include <libutil.h>
39 #endif
40
41 #define USAGE \
42 "st " VERSION " (c) 2010-2012 st engineers\n" \
43 "usage: st [-v] [-c class] [-f font] [-g geometry] [-o file]" \
44 " [-t title] [-w windowid] [-e command ...]\n"
45
46 /* XEMBED messages */
47 #define XEMBED_FOCUS_IN 4
48 #define XEMBED_FOCUS_OUT 5
49
50 /* Arbitrary sizes */
51 #define ESC_BUF_SIZ 256
52 #define ESC_ARG_SIZ 16
53 #define STR_BUF_SIZ 256
54 #define STR_ARG_SIZ 16
55 #define DRAW_BUF_SIZ 20*1024
56 #define UTF_SIZ 4
57 #define XK_NO_MOD UINT_MAX
58 #define XK_ANY_MOD 0
59
60 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
61
62 #define SERRNO strerror(errno)
63 #define MIN(a, b) ((a) < (b) ? (a) : (b))
64 #define MAX(a, b) ((a) < (b) ? (b) : (a))
65 #define LEN(a) (sizeof(a) / sizeof(a[0]))
66 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
67 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
68 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
69 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
70 #define IS_SET(flag) (term.mode & (flag))
71 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
72 #define X2COL(x) (((x) - BORDER)/xw.cw)
73 #define Y2ROW(y) (((y) - BORDER)/xw.ch)
74
75 #define VT102ID "\033[?6c"
76
77 enum glyph_attribute {
78 ATTR_NULL = 0,
79 ATTR_REVERSE = 1,
80 ATTR_UNDERLINE = 2,
81 ATTR_BOLD = 4,
82 ATTR_GFX = 8,
83 ATTR_ITALIC = 16,
84 ATTR_BLINK = 32,
85 };
86
87 enum cursor_movement {
88 CURSOR_UP,
89 CURSOR_DOWN,
90 CURSOR_LEFT,
91 CURSOR_RIGHT,
92 CURSOR_SAVE,
93 CURSOR_LOAD
94 };
95
96 enum cursor_state {
97 CURSOR_DEFAULT = 0,
98 CURSOR_HIDE = 1,
99 CURSOR_WRAPNEXT = 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 };
119
120 enum escape_state {
121 ESC_START = 1,
122 ESC_CSI = 2,
123 ESC_STR = 4, /* DSC, OSC, PM, APC */
124 ESC_ALTCHARSET = 8,
125 ESC_STR_END = 16, /* a final string was encountered */
126 ESC_TEST = 32, /* Enter in test mode */
127 };
128
129 enum window_state {
130 WIN_VISIBLE = 1,
131 WIN_REDRAW = 2,
132 WIN_FOCUSED = 4
133 };
134
135 /* bit macro */
136 #undef B0
137 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
138
139 typedef unsigned char uchar;
140 typedef unsigned int uint;
141 typedef unsigned long ulong;
142 typedef unsigned short ushort;
143
144 typedef struct {
145 char c[UTF_SIZ]; /* character code */
146 uchar mode; /* attribute flags */
147 ushort fg; /* foreground */
148 ushort bg; /* background */
149 uchar state; /* state flags */
150 } Glyph;
151
152 typedef Glyph* Line;
153
154 typedef struct {
155 Glyph attr; /* current char attributes */
156 int x;
157 int y;
158 char state;
159 } TCursor;
160
161 /* CSI Escape sequence structs */
162 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
163 typedef struct {
164 char buf[ESC_BUF_SIZ]; /* raw string */
165 int len; /* raw string length */
166 char priv;
167 int arg[ESC_ARG_SIZ];
168 int narg; /* nb of args */
169 char mode;
170 } CSIEscape;
171
172 /* STR Escape sequence structs */
173 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
174 typedef struct {
175 char type; /* ESC type ... */
176 char buf[STR_BUF_SIZ]; /* raw string */
177 int len; /* raw string length */
178 char *args[STR_ARG_SIZ];
179 int narg; /* nb of args */
180 } STREscape;
181
182 /* Internal representation of the screen */
183 typedef struct {
184 int row; /* nb row */
185 int col; /* nb col */
186 Line *line; /* screen */
187 Line *alt; /* alternate screen */
188 bool *dirty; /* dirtyness of lines */
189 TCursor c; /* cursor */
190 int top; /* top scroll limit */
191 int bot; /* bottom scroll limit */
192 int mode; /* terminal mode flags */
193 int esc; /* escape state flags */
194 bool *tabs;
195 } Term;
196
197 /* Purely graphic info */
198 typedef struct {
199 Display* dpy;
200 Colormap cmap;
201 Window win;
202 XdbeBackBuffer buf;
203 Atom xembed, wmdeletewin;
204 XIM xim;
205 XIC xic;
206 XftDraw *xft_draw;
207 Visual *vis;
208 int scr;
209 bool isfixed; /* is fixed geometry? */
210 int fx, fy, fw, fh; /* fixed geometry */
211 int tw, th; /* tty width and height */
212 int w; /* window width */
213 int h; /* window height */
214 int ch; /* char height */
215 int cw; /* char width */
216 char state; /* focus, redraw, visible */
217 } XWindow;
218
219 typedef struct {
220 KeySym k;
221 uint mask;
222 char s[ESC_BUF_SIZ];
223 } Key;
224
225 /* TODO: use better name for vars... */
226 typedef struct {
227 int mode;
228 int bx, by;
229 int ex, ey;
230 struct {
231 int x, y;
232 } b, e;
233 char *clip;
234 Atom xtarget;
235 bool alt;
236 struct timeval tclick1;
237 struct timeval tclick2;
238 } Selection;
239
240 #include "config.h"
241
242 /* Font structure */
243 typedef struct {
244 int height;
245 int width;
246 int ascent;
247 int descent;
248 short lbearing;
249 short rbearing;
250 XftFont *xft_set;
251 } Font;
252
253 /* Drawing Context */
254 typedef struct {
255 XftColor xft_col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
256 GC gc;
257 Font font, bfont, ifont, ibfont;
258 } DC;
259
260 static void die(const char *, ...);
261 static void draw(void);
262 static void redraw(void);
263 static void drawregion(int, int, int, int);
264 static void execsh(void);
265 static void sigchld(int);
266 static void run(void);
267
268 static void csidump(void);
269 static void csihandle(void);
270 static void csiparse(void);
271 static void csireset(void);
272 static void strdump(void);
273 static void strhandle(void);
274 static void strparse(void);
275 static void strreset(void);
276
277 static void tclearregion(int, int, int, int);
278 static void tcursor(int);
279 static void tdeletechar(int);
280 static void tdeleteline(int);
281 static void tinsertblank(int);
282 static void tinsertblankline(int);
283 static void tmoveto(int, int);
284 static void tnew(int, int);
285 static void tnewline(int);
286 static void tputtab(bool);
287 static void tputc(char *, int);
288 static void treset(void);
289 static int tresize(int, int);
290 static void tscrollup(int, int);
291 static void tscrolldown(int, int);
292 static void tsetattr(int*, int);
293 static void tsetchar(char *, Glyph *, int, int);
294 static void tsetscroll(int, int);
295 static void tswapscreen(void);
296 static void tsetdirt(int, int);
297 static void tsetmode(bool, bool, int *, int);
298 static void tfulldirt(void);
299
300 static void ttynew(void);
301 static void ttyread(void);
302 static void ttyresize(void);
303 static void ttywrite(const char *, size_t);
304
305 static void xdraws(char *, Glyph, int, int, int, int);
306 static void xhints(void);
307 static void xclear(int, int, int, int);
308 static void xdrawcursor(void);
309 static void xinit(void);
310 static void xloadcols(void);
311 static void xresettitle(void);
312 static void xseturgency(int);
313 static void xsetsel(char*);
314 static void xtermclear(int, int, int, int);
315 static void xresize(int, int);
316
317 static void expose(XEvent *);
318 static void visibility(XEvent *);
319 static void unmap(XEvent *);
320 static char *kmap(KeySym, uint);
321 static void kpress(XEvent *);
322 static void cmessage(XEvent *);
323 static void resize(XEvent *);
324 static void focus(XEvent *);
325 static void brelease(XEvent *);
326 static void bpress(XEvent *);
327 static void bmotion(XEvent *);
328 static void selnotify(XEvent *);
329 static void selclear(XEvent *);
330 static void selrequest(XEvent *);
331
332 static void selinit(void);
333 static inline bool selected(int, int);
334 static void selcopy(void);
335 static void selpaste(void);
336 static void selscroll(int, int);
337
338 static int utf8decode(char *, long *);
339 static int utf8encode(long *, char *);
340 static int utf8size(char *);
341 static int isfullutf8(char *, int);
342
343 static void *xmalloc(size_t);
344 static void *xrealloc(void *, size_t);
345 static void *xcalloc(size_t nmemb, size_t size);
346 static char *smstrcat(char *, ...);
347
348 static void (*handler[LASTEvent])(XEvent *) = {
349 [KeyPress] = kpress,
350 [ClientMessage] = cmessage,
351 [ConfigureNotify] = resize,
352 [VisibilityNotify] = visibility,
353 [UnmapNotify] = unmap,
354 [Expose] = expose,
355 [FocusIn] = focus,
356 [FocusOut] = focus,
357 [MotionNotify] = bmotion,
358 [ButtonPress] = bpress,
359 [ButtonRelease] = brelease,
360 [SelectionClear] = selclear,
361 [SelectionNotify] = selnotify,
362 [SelectionRequest] = selrequest,
363 };
364
365 /* Globals */
366 static DC dc;
367 static XWindow xw;
368 static Term term;
369 static CSIEscape csiescseq;
370 static STREscape strescseq;
371 static int cmdfd;
372 static pid_t pid;
373 static Selection sel;
374 static int iofd = -1;
375 static char **opt_cmd = NULL;
376 static char *opt_io = NULL;
377 static char *opt_title = NULL;
378 static char *opt_embed = NULL;
379 static char *opt_class = NULL;
380 static char *opt_font = NULL;
381
382 void *
383 xmalloc(size_t len) {
384 void *p = malloc(len);
385
386 if(!p)
387 die("Out of memory\n");
388
389 return p;
390 }
391
392 void *
393 xrealloc(void *p, size_t len) {
394 if((p = realloc(p, len)) == NULL)
395 die("Out of memory\n");
396
397 return p;
398 }
399
400 void *
401 xcalloc(size_t nmemb, size_t size) {
402 void *p = calloc(nmemb, size);
403
404 if(!p)
405 die("Out of memory\n");
406
407 return p;
408 }
409
410 char *
411 smstrcat(char *src, ...)
412 {
413 va_list fmtargs;
414 char *ret, *p, *v;
415 int len, slen, flen;
416
417 len = slen = strlen(src);
418
419 va_start(fmtargs, src);
420 for(;;) {
421 v = va_arg(fmtargs, char *);
422 if(v == NULL)
423 break;
424 len += strlen(v);
425 }
426 va_end(fmtargs);
427
428 p = ret = xmalloc(len+1);
429 memmove(p, src, slen);
430 p += slen;
431
432 va_start(fmtargs, src);
433 for(;;) {
434 v = va_arg(fmtargs, char *);
435 if(v == NULL)
436 break;
437 flen = strlen(v);
438 memmove(p, v, flen);
439 p += flen;
440 }
441 va_end(fmtargs);
442
443 ret[len] = '\0';
444
445 return ret;
446 }
447
448 int
449 utf8decode(char *s, long *u) {
450 uchar c;
451 int i, n, rtn;
452
453 rtn = 1;
454 c = *s;
455 if(~c & B7) { /* 0xxxxxxx */
456 *u = c;
457 return rtn;
458 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
459 *u = c&(B4|B3|B2|B1|B0);
460 n = 1;
461 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
462 *u = c&(B3|B2|B1|B0);
463 n = 2;
464 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
465 *u = c & (B2|B1|B0);
466 n = 3;
467 } else {
468 goto invalid;
469 }
470
471 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
472 c = *s;
473 if((c & (B7|B6)) != B7) /* 10xxxxxx */
474 goto invalid;
475 *u <<= 6;
476 *u |= c & (B5|B4|B3|B2|B1|B0);
477 }
478
479 if((n == 1 && *u < 0x80) ||
480 (n == 2 && *u < 0x800) ||
481 (n == 3 && *u < 0x10000) ||
482 (*u >= 0xD800 && *u <= 0xDFFF)) {
483 goto invalid;
484 }
485
486 return rtn;
487 invalid:
488 *u = 0xFFFD;
489
490 return rtn;
491 }
492
493 int
494 utf8encode(long *u, char *s) {
495 uchar *sp;
496 ulong uc;
497 int i, n;
498
499 sp = (uchar *)s;
500 uc = *u;
501 if(uc < 0x80) {
502 *sp = uc; /* 0xxxxxxx */
503 return 1;
504 } else if(*u < 0x800) {
505 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
506 n = 1;
507 } else if(uc < 0x10000) {
508 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
509 n = 2;
510 } else if(uc <= 0x10FFFF) {
511 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
512 n = 3;
513 } else {
514 goto invalid;
515 }
516
517 for(i=n,++sp; i>0; --i,++sp)
518 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
519
520 return n+1;
521 invalid:
522 /* U+FFFD */
523 *s++ = '\xEF';
524 *s++ = '\xBF';
525 *s = '\xBD';
526
527 return 3;
528 }
529
530 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
531 UTF-8 otherwise return 0 */
532 int
533 isfullutf8(char *s, int b) {
534 uchar *c1, *c2, *c3;
535
536 c1 = (uchar *)s;
537 c2 = (uchar *)++s;
538 c3 = (uchar *)++s;
539 if(b < 1) {
540 return 0;
541 } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
542 return 0;
543 } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
544 ((b == 1) ||
545 ((b == 2) && (*c2&(B7|B6)) == B7))) {
546 return 0;
547 } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
548 ((b == 1) ||
549 ((b == 2) && (*c2&(B7|B6)) == B7) ||
550 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
551 return 0;
552 } else {
553 return 1;
554 }
555 }
556
557 int
558 utf8size(char *s) {
559 uchar c = *s;
560
561 if(~c&B7) {
562 return 1;
563 } else if((c&(B7|B6|B5)) == (B7|B6)) {
564 return 2;
565 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
566 return 3;
567 } else {
568 return 4;
569 }
570 }
571
572 void
573 selinit(void) {
574 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
575 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
576 sel.mode = 0;
577 sel.bx = -1;
578 sel.clip = NULL;
579 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
580 if(sel.xtarget == None)
581 sel.xtarget = XA_STRING;
582 }
583
584 static inline bool
585 selected(int x, int y) {
586 int bx, ex;
587
588 if(sel.ey == y && sel.by == y) {
589 bx = MIN(sel.bx, sel.ex);
590 ex = MAX(sel.bx, sel.ex);
591 return BETWEEN(x, bx, ex);
592 }
593
594 return ((sel.b.y < y && y < sel.e.y)
595 || (y == sel.e.y && x <= sel.e.x))
596 || (y == sel.b.y && x >= sel.b.x
597 && (x <= sel.e.x || sel.b.y != sel.e.y));
598 }
599
600 void
601 getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
602 if(b)
603 *b = e->xbutton.button;
604
605 *x = X2COL(e->xbutton.x);
606 *y = Y2ROW(e->xbutton.y);
607 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
608 sel.b.y = MIN(sel.by, sel.ey);
609 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
610 sel.e.y = MAX(sel.by, sel.ey);
611 }
612
613 void
614 mousereport(XEvent *e) {
615 int x = X2COL(e->xbutton.x);
616 int y = Y2ROW(e->xbutton.y);
617 int button = e->xbutton.button;
618 int state = e->xbutton.state;
619 char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
620 static int ob, ox, oy;
621
622 /* from urxvt */
623 if(e->xbutton.type == MotionNotify) {
624 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
625 return;
626 button = ob + 32;
627 ox = x, oy = y;
628 } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
629 button = 3;
630 } else {
631 button -= Button1;
632 if(button >= 3)
633 button += 64 - 3;
634 if(e->xbutton.type == ButtonPress) {
635 ob = button;
636 ox = x, oy = y;
637 }
638 }
639
640 buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
641 + (state & Mod4Mask ? 8 : 0)
642 + (state & ControlMask ? 16 : 0);
643
644 ttywrite(buf, sizeof(buf));
645 }
646
647 void
648 bpress(XEvent *e) {
649 if(IS_SET(MODE_MOUSE)) {
650 mousereport(e);
651 } else if(e->xbutton.button == Button1) {
652 if(sel.bx != -1) {
653 sel.bx = -1;
654 tsetdirt(sel.b.y, sel.e.y);
655 draw();
656 }
657 sel.mode = 1;
658 sel.ex = sel.bx = X2COL(e->xbutton.x);
659 sel.ey = sel.by = Y2ROW(e->xbutton.y);
660 }
661 }
662
663 void
664 selcopy(void) {
665 char *str, *ptr, *p;
666 int x, y, bufsize, is_selected = 0, size;
667 Glyph *gp;
668
669 if(sel.bx == -1) {
670 str = NULL;
671 } else {
672 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
673 ptr = str = xmalloc(bufsize);
674
675 /* append every set & selected glyph to the selection */
676 for(y = 0; y < term.row; y++) {
677 for(x = 0; x < term.col; x++) {
678 gp = &term.line[y][x];
679
680 if(!(is_selected = selected(x, y)))
681 continue;
682 p = (gp->state & GLYPH_SET) ? gp->c : " ";
683 size = utf8size(p);
684 memcpy(ptr, p, size);
685 ptr += size;
686 }
687 /* \n at the end of every selected line except for the last one */
688 if(is_selected && y < sel.e.y)
689 *ptr++ = '\n';
690 }
691 *ptr = 0;
692 }
693 sel.alt = IS_SET(MODE_ALTSCREEN);
694 xsetsel(str);
695 }
696
697 void
698 selnotify(XEvent *e) {
699 ulong nitems, ofs, rem;
700 int format;
701 uchar *data;
702 Atom type;
703
704 ofs = 0;
705 do {
706 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
707 False, AnyPropertyType, &type, &format,
708 &nitems, &rem, &data)) {
709 fprintf(stderr, "Clipboard allocation failed\n");
710 return;
711 }
712 ttywrite((const char *) data, nitems * format / 8);
713 XFree(data);
714 /* number of 32-bit chunks returned */
715 ofs += nitems * format / 32;
716 } while(rem > 0);
717 }
718
719 void
720 selpaste(void) {
721 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
722 xw.win, CurrentTime);
723 }
724
725 void selclear(XEvent *e) {
726 if(sel.bx == -1)
727 return;
728 sel.bx = -1;
729 tsetdirt(sel.b.y, sel.e.y);
730 }
731
732 void
733 selrequest(XEvent *e) {
734 XSelectionRequestEvent *xsre;
735 XSelectionEvent xev;
736 Atom xa_targets, string;
737
738 xsre = (XSelectionRequestEvent *) e;
739 xev.type = SelectionNotify;
740 xev.requestor = xsre->requestor;
741 xev.selection = xsre->selection;
742 xev.target = xsre->target;
743 xev.time = xsre->time;
744 /* reject */
745 xev.property = None;
746
747 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
748 if(xsre->target == xa_targets) {
749 /* respond with the supported type */
750 string = sel.xtarget;
751 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
752 XA_ATOM, 32, PropModeReplace,
753 (uchar *) &string, 1);
754 xev.property = xsre->property;
755 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
756 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
757 xsre->target, 8, PropModeReplace,
758 (uchar *) sel.clip, strlen(sel.clip));
759 xev.property = xsre->property;
760 }
761
762 /* all done, send a notification to the listener */
763 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
764 fprintf(stderr, "Error sending SelectionNotify event\n");
765 }
766
767 void
768 xsetsel(char *str) {
769 /* register the selection for both the clipboard and the primary */
770 Atom clipboard;
771
772 free(sel.clip);
773 sel.clip = str;
774
775 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
776
777 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
778 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
779 }
780
781 void
782 brelease(XEvent *e) {
783 struct timeval now;
784
785 if(IS_SET(MODE_MOUSE)) {
786 mousereport(e);
787 return;
788 }
789
790 if(e->xbutton.button == Button2) {
791 selpaste();
792 } else if(e->xbutton.button == Button1) {
793 sel.mode = 0;
794 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
795 term.dirty[sel.ey] = 1;
796 if(sel.bx == sel.ex && sel.by == sel.ey) {
797 sel.bx = -1;
798 gettimeofday(&now, NULL);
799
800 if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
801 /* triple click on the line */
802 sel.b.x = sel.bx = 0;
803 sel.e.x = sel.ex = term.col;
804 sel.b.y = sel.e.y = sel.ey;
805 selcopy();
806 } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
807 /* double click to select word */
808 sel.bx = sel.ex;
809 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
810 term.line[sel.ey][sel.bx-1].c[0] != ' ') {
811 sel.bx--;
812 }
813 sel.b.x = sel.bx;
814 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
815 term.line[sel.ey][sel.ex+1].c[0] != ' ') {
816 sel.ex++;
817 }
818 sel.e.x = sel.ex;
819 sel.b.y = sel.e.y = sel.ey;
820 selcopy();
821 }
822 } else {
823 selcopy();
824 }
825 }
826
827 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
828 gettimeofday(&sel.tclick1, NULL);
829 }
830
831 void
832 bmotion(XEvent *e) {
833 int starty, endy, oldey, oldex;
834
835 if(IS_SET(MODE_MOUSE)) {
836 mousereport(e);
837 return;
838 }
839
840 if(sel.mode) {
841 oldey = sel.ey;
842 oldex = sel.ex;
843 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
844
845 if(oldey != sel.ey || oldex != sel.ex) {
846 starty = MIN(oldey, sel.ey);
847 endy = MAX(oldey, sel.ey);
848 tsetdirt(starty, endy);
849 }
850 }
851 }
852
853 void
854 die(const char *errstr, ...) {
855 va_list ap;
856
857 va_start(ap, errstr);
858 vfprintf(stderr, errstr, ap);
859 va_end(ap);
860 exit(EXIT_FAILURE);
861 }
862
863 void
864 execsh(void) {
865 char **args;
866 char *envshell = getenv("SHELL");
867
868 unsetenv("COLUMNS");
869 unsetenv("LINES");
870 unsetenv("TERMCAP");
871
872 signal(SIGCHLD, SIG_DFL);
873 signal(SIGHUP, SIG_DFL);
874 signal(SIGINT, SIG_DFL);
875 signal(SIGQUIT, SIG_DFL);
876 signal(SIGTERM, SIG_DFL);
877 signal(SIGALRM, SIG_DFL);
878
879 DEFAULT(envshell, SHELL);
880 putenv("TERM="TNAME);
881 args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
882 execvp(args[0], args);
883 exit(EXIT_FAILURE);
884 }
885
886 void
887 sigchld(int a) {
888 int stat = 0;
889
890 if(waitpid(pid, &stat, 0) < 0)
891 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
892
893 if(WIFEXITED(stat)) {
894 exit(WEXITSTATUS(stat));
895 } else {
896 exit(EXIT_FAILURE);
897 }
898 }
899
900 void
901 ttynew(void) {
902 int m, s;
903 struct winsize w = {term.row, term.col, 0, 0};
904
905 /* seems to work fine on linux, openbsd and freebsd */
906 if(openpty(&m, &s, NULL, NULL, &w) < 0)
907 die("openpty failed: %s\n", SERRNO);
908
909 switch(pid = fork()) {
910 case -1:
911 die("fork failed\n");
912 break;
913 case 0:
914 setsid(); /* create a new process group */
915 dup2(s, STDIN_FILENO);
916 dup2(s, STDOUT_FILENO);
917 dup2(s, STDERR_FILENO);
918 if(ioctl(s, TIOCSCTTY, NULL) < 0)
919 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
920 close(s);
921 close(m);
922 execsh();
923 break;
924 default:
925 close(s);
926 cmdfd = m;
927 signal(SIGCHLD, sigchld);
928 if(opt_io) {
929 if(!strcmp(opt_io, "-")) {
930 iofd = STDOUT_FILENO;
931 } else {
932 if((iofd = open(opt_io, O_WRONLY | O_CREAT, 0666)) < 0) {
933 fprintf(stderr, "Error opening %s:%s\n",
934 opt_io, strerror(errno));
935 }
936 }
937 }
938 }
939 }
940
941 void
942 dump(char c) {
943 static int col;
944
945 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
946 if(++col % 10 == 0)
947 fprintf(stderr, "\n");
948 }
949
950 void
951 ttyread(void) {
952 static char buf[BUFSIZ];
953 static int buflen = 0;
954 char *ptr;
955 char s[UTF_SIZ];
956 int charsize; /* size of utf8 char in bytes */
957 long utf8c;
958 int ret;
959
960 /* append read bytes to unprocessed bytes */
961 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
962 die("Couldn't read from shell: %s\n", SERRNO);
963
964 /* process every complete utf8 char */
965 buflen += ret;
966 ptr = buf;
967 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
968 charsize = utf8decode(ptr, &utf8c);
969 utf8encode(&utf8c, s);
970 tputc(s, charsize);
971 ptr += charsize;
972 buflen -= charsize;
973 }
974
975 /* keep any uncomplete utf8 char for the next call */
976 memmove(buf, ptr, buflen);
977 }
978
979 void
980 ttywrite(const char *s, size_t n) {
981 if(write(cmdfd, s, n) == -1)
982 die("write error on tty: %s\n", SERRNO);
983 }
984
985 void
986 ttyresize(void) {
987 struct winsize w;
988
989 w.ws_row = term.row;
990 w.ws_col = term.col;
991 w.ws_xpixel = xw.tw;
992 w.ws_ypixel = xw.th;
993 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
994 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
995 }
996
997 void
998 tsetdirt(int top, int bot) {
999 int i;
1000
1001 LIMIT(top, 0, term.row-1);
1002 LIMIT(bot, 0, term.row-1);
1003
1004 for(i = top; i <= bot; i++)
1005 term.dirty[i] = 1;
1006 }
1007
1008 void
1009 tfulldirt(void) {
1010 tsetdirt(0, term.row-1);
1011 }
1012
1013 void
1014 tcursor(int mode) {
1015 static TCursor c;
1016
1017 if(mode == CURSOR_SAVE) {
1018 c = term.c;
1019 } else if(mode == CURSOR_LOAD) {
1020 term.c = c;
1021 tmoveto(c.x, c.y);
1022 }
1023 }
1024
1025 void
1026 treset(void) {
1027 uint i;
1028
1029 term.c = (TCursor){{
1030 .mode = ATTR_NULL,
1031 .fg = DefaultFG,
1032 .bg = DefaultBG
1033 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1034
1035 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1036 for(i = TAB; i < term.col; i += TAB)
1037 term.tabs[i] = 1;
1038 term.top = 0;
1039 term.bot = term.row - 1;
1040 term.mode = MODE_WRAP;
1041
1042 tclearregion(0, 0, term.col-1, term.row-1);
1043 }
1044
1045 void
1046 tnew(int col, int row) {
1047 /* set screen size */
1048 term.row = row;
1049 term.col = col;
1050 term.line = xmalloc(term.row * sizeof(Line));
1051 term.alt = xmalloc(term.row * sizeof(Line));
1052 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
1053 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
1054
1055 for(row = 0; row < term.row; row++) {
1056 term.line[row] = xmalloc(term.col * sizeof(Glyph));
1057 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
1058 term.dirty[row] = 0;
1059 }
1060 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1061 /* setup screen */
1062 treset();
1063 }
1064
1065 void
1066 tswapscreen(void) {
1067 Line *tmp = term.line;
1068
1069 term.line = term.alt;
1070 term.alt = tmp;
1071 term.mode ^= MODE_ALTSCREEN;
1072 tfulldirt();
1073 }
1074
1075 void
1076 tscrolldown(int orig, int n) {
1077 int i;
1078 Line temp;
1079
1080 LIMIT(n, 0, term.bot-orig+1);
1081
1082 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1083
1084 for(i = term.bot; i >= orig+n; i--) {
1085 temp = term.line[i];
1086 term.line[i] = term.line[i-n];
1087 term.line[i-n] = temp;
1088
1089 term.dirty[i] = 1;
1090 term.dirty[i-n] = 1;
1091 }
1092
1093 selscroll(orig, n);
1094 }
1095
1096 void
1097 tscrollup(int orig, int n) {
1098 int i;
1099 Line temp;
1100 LIMIT(n, 0, term.bot-orig+1);
1101
1102 tclearregion(0, orig, term.col-1, orig+n-1);
1103
1104 for(i = orig; i <= term.bot-n; i++) {
1105 temp = term.line[i];
1106 term.line[i] = term.line[i+n];
1107 term.line[i+n] = temp;
1108
1109 term.dirty[i] = 1;
1110 term.dirty[i+n] = 1;
1111 }
1112
1113 selscroll(orig, -n);
1114 }
1115
1116 void
1117 selscroll(int orig, int n) {
1118 if(sel.bx == -1)
1119 return;
1120
1121 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1122 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1123 sel.bx = -1;
1124 return;
1125 }
1126 if(sel.by < term.top) {
1127 sel.by = term.top;
1128 sel.bx = 0;
1129 }
1130 if(sel.ey > term.bot) {
1131 sel.ey = term.bot;
1132 sel.ex = term.col;
1133 }
1134 sel.b.y = sel.by, sel.b.x = sel.bx;
1135 sel.e.y = sel.ey, sel.e.x = sel.ex;
1136 }
1137 }
1138
1139 void
1140 tnewline(int first_col) {
1141 int y = term.c.y;
1142
1143 if(y == term.bot) {
1144 tscrollup(term.top, 1);
1145 } else {
1146 y++;
1147 }
1148 tmoveto(first_col ? 0 : term.c.x, y);
1149 }
1150
1151 void
1152 csiparse(void) {
1153 /* int noarg = 1; */
1154 char *p = csiescseq.buf;
1155
1156 csiescseq.narg = 0;
1157 if(*p == '?')
1158 csiescseq.priv = 1, p++;
1159
1160 while(p < csiescseq.buf+csiescseq.len) {
1161 while(isdigit(*p)) {
1162 csiescseq.arg[csiescseq.narg] *= 10;
1163 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1164 }
1165 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ) {
1166 csiescseq.narg++, p++;
1167 } else {
1168 csiescseq.mode = *p;
1169 csiescseq.narg++;
1170
1171 return;
1172 }
1173 }
1174 }
1175
1176 void
1177 tmoveto(int x, int y) {
1178 LIMIT(x, 0, term.col-1);
1179 LIMIT(y, 0, term.row-1);
1180 term.c.state &= ~CURSOR_WRAPNEXT;
1181 term.c.x = x;
1182 term.c.y = y;
1183 }
1184
1185 void
1186 tsetchar(char *c, Glyph *attr, int x, int y) {
1187 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1188 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1189 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1190 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1191 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1192 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1193 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1194 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1195 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1196 };
1197
1198 /*
1199 * The table is proudly stolen from rxvt.
1200 */
1201 if(attr->mode & ATTR_GFX) {
1202 if(c[0] >= 0x41 && c[0] <= 0x7e
1203 && vt100_0[c[0] - 0x41]) {
1204 c = vt100_0[c[0] - 0x41];
1205 }
1206 }
1207
1208 term.dirty[y] = 1;
1209 term.line[y][x] = *attr;
1210 memcpy(term.line[y][x].c, c, UTF_SIZ);
1211 term.line[y][x].state |= GLYPH_SET;
1212 }
1213
1214 void
1215 tclearregion(int x1, int y1, int x2, int y2) {
1216 int x, y, temp;
1217
1218 if(x1 > x2)
1219 temp = x1, x1 = x2, x2 = temp;
1220 if(y1 > y2)
1221 temp = y1, y1 = y2, y2 = temp;
1222
1223 LIMIT(x1, 0, term.col-1);
1224 LIMIT(x2, 0, term.col-1);
1225 LIMIT(y1, 0, term.row-1);
1226 LIMIT(y2, 0, term.row-1);
1227
1228 for(y = y1; y <= y2; y++) {
1229 term.dirty[y] = 1;
1230 for(x = x1; x <= x2; x++)
1231 term.line[y][x].state = 0;
1232 }
1233 }
1234
1235 void
1236 tdeletechar(int n) {
1237 int src = term.c.x + n;
1238 int dst = term.c.x;
1239 int size = term.col - src;
1240
1241 term.dirty[term.c.y] = 1;
1242
1243 if(src >= term.col) {
1244 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1245 return;
1246 }
1247
1248 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1249 size * sizeof(Glyph));
1250 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1251 }
1252
1253 void
1254 tinsertblank(int n) {
1255 int src = term.c.x;
1256 int dst = src + n;
1257 int size = term.col - dst;
1258
1259 term.dirty[term.c.y] = 1;
1260
1261 if(dst >= term.col) {
1262 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1263 return;
1264 }
1265
1266 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1267 size * sizeof(Glyph));
1268 tclearregion(src, term.c.y, dst - 1, term.c.y);
1269 }
1270
1271 void
1272 tinsertblankline(int n) {
1273 if(term.c.y < term.top || term.c.y > term.bot)
1274 return;
1275
1276 tscrolldown(term.c.y, n);
1277 }
1278
1279 void
1280 tdeleteline(int n) {
1281 if(term.c.y < term.top || term.c.y > term.bot)
1282 return;
1283
1284 tscrollup(term.c.y, n);
1285 }
1286
1287 void
1288 tsetattr(int *attr, int l) {
1289 int i;
1290
1291 for(i = 0; i < l; i++) {
1292 switch(attr[i]) {
1293 case 0:
1294 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1295 | ATTR_ITALIC | ATTR_BLINK);
1296 term.c.attr.fg = DefaultFG;
1297 term.c.attr.bg = DefaultBG;
1298 break;
1299 case 1:
1300 term.c.attr.mode |= ATTR_BOLD;
1301 break;
1302 case 3: /* enter standout (highlight) */
1303 term.c.attr.mode |= ATTR_ITALIC;
1304 break;
1305 case 4:
1306 term.c.attr.mode |= ATTR_UNDERLINE;
1307 break;
1308 case 5:
1309 term.c.attr.mode |= ATTR_BLINK;
1310 break;
1311 case 7:
1312 term.c.attr.mode |= ATTR_REVERSE;
1313 break;
1314 case 21:
1315 case 22:
1316 term.c.attr.mode &= ~ATTR_BOLD;
1317 break;
1318 case 23: /* leave standout (highlight) mode */
1319 term.c.attr.mode &= ~ATTR_ITALIC;
1320 break;
1321 case 24:
1322 term.c.attr.mode &= ~ATTR_UNDERLINE;
1323 break;
1324 case 25:
1325 term.c.attr.mode &= ~ATTR_BLINK;
1326 break;
1327 case 27:
1328 term.c.attr.mode &= ~ATTR_REVERSE;
1329 break;
1330 case 38:
1331 if(i + 2 < l && attr[i + 1] == 5) {
1332 i += 2;
1333 if(BETWEEN(attr[i], 0, 255)) {
1334 term.c.attr.fg = attr[i];
1335 } else {
1336 fprintf(stderr,
1337 "erresc: bad fgcolor %d\n",
1338 attr[i]);
1339 }
1340 } else {
1341 fprintf(stderr,
1342 "erresc(38): gfx attr %d unknown\n",
1343 attr[i]);
1344 }
1345 break;
1346 case 39:
1347 term.c.attr.fg = DefaultFG;
1348 break;
1349 case 48:
1350 if(i + 2 < l && attr[i + 1] == 5) {
1351 i += 2;
1352 if(BETWEEN(attr[i], 0, 255)) {
1353 term.c.attr.bg = attr[i];
1354 } else {
1355 fprintf(stderr,
1356 "erresc: bad bgcolor %d\n",
1357 attr[i]);
1358 }
1359 } else {
1360 fprintf(stderr,
1361 "erresc(48): gfx attr %d unknown\n",
1362 attr[i]);
1363 }
1364 break;
1365 case 49:
1366 term.c.attr.bg = DefaultBG;
1367 break;
1368 default:
1369 if(BETWEEN(attr[i], 30, 37)) {
1370 term.c.attr.fg = attr[i] - 30;
1371 } else if(BETWEEN(attr[i], 40, 47)) {
1372 term.c.attr.bg = attr[i] - 40;
1373 } else if(BETWEEN(attr[i], 90, 97)) {
1374 term.c.attr.fg = attr[i] - 90 + 8;
1375 } else if(BETWEEN(attr[i], 100, 107)) {
1376 term.c.attr.bg = attr[i] - 100 + 8;
1377 } else {
1378 fprintf(stderr,
1379 "erresc(default): gfx attr %d unknown\n",
1380 attr[i]), csidump();
1381 }
1382 break;
1383 }
1384 }
1385 }
1386
1387 void
1388 tsetscroll(int t, int b) {
1389 int temp;
1390
1391 LIMIT(t, 0, term.row-1);
1392 LIMIT(b, 0, term.row-1);
1393 if(t > b) {
1394 temp = t;
1395 t = b;
1396 b = temp;
1397 }
1398 term.top = t;
1399 term.bot = b;
1400 }
1401
1402 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1403
1404 void
1405 tsetmode(bool priv, bool set, int *args, int narg) {
1406 int *lim, mode;
1407
1408 for(lim = args + narg; args < lim; ++args) {
1409 if(priv) {
1410 switch(*args) {
1411 break;
1412 case 1: /* DECCKM -- Cursor key */
1413 MODBIT(term.mode, set, MODE_APPKEYPAD);
1414 break;
1415 case 5: /* DECSCNM -- Reverse video */
1416 mode = term.mode;
1417 MODBIT(term.mode, set, MODE_REVERSE);
1418 if(mode != term.mode)
1419 redraw();
1420 break;
1421 case 6: /* XXX: DECOM -- Origin */
1422 break;
1423 case 7: /* DECAWM -- Auto wrap */
1424 MODBIT(term.mode, set, MODE_WRAP);
1425 break;
1426 case 8: /* XXX: DECARM -- Auto repeat */
1427 break;
1428 case 0: /* Error (IGNORED) */
1429 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1430 break;
1431 case 25:
1432 MODBIT(term.c.state, !set, CURSOR_HIDE);
1433 break;
1434 case 1000: /* 1000,1002: enable xterm mouse report */
1435 MODBIT(term.mode, set, MODE_MOUSEBTN);
1436 break;
1437 case 1002:
1438 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1439 break;
1440 case 1049: /* = 1047 and 1048 */
1441 case 47:
1442 case 1047:
1443 if(IS_SET(MODE_ALTSCREEN))
1444 tclearregion(0, 0, term.col-1, term.row-1);
1445 if((set && !IS_SET(MODE_ALTSCREEN)) ||
1446 (!set && IS_SET(MODE_ALTSCREEN))) {
1447 tswapscreen();
1448 }
1449 if(*args != 1049)
1450 break;
1451 /* pass through */
1452 case 1048:
1453 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1454 break;
1455 default:
1456 /* case 2: DECANM -- ANSI/VT52 (NOT SUPPOURTED) */
1457 /* case 3: DECCOLM -- Column (NOT SUPPORTED) */
1458 /* case 4: DECSCLM -- Scroll (NOT SUPPORTED) */
1459 /* case 18: DECPFF -- Printer feed (NOT SUPPORTED) */
1460 /* case 19: DECPEX -- Printer extent (NOT SUPPORTED) */
1461 /* case 42: DECNRCM -- National characters (NOT SUPPORTED) */
1462 fprintf(stderr,
1463 "erresc: unknown private set/reset mode %d\n",
1464 *args);
1465 break;
1466 }
1467 } else {
1468 switch(*args) {
1469 case 0: /* Error (IGNORED) */
1470 break;
1471 case 2: /* KAM -- keyboard action */
1472 MODBIT(term.mode, set, MODE_KBDLOCK);
1473 break;
1474 case 4: /* IRM -- Insertion-replacement */
1475 MODBIT(term.mode, set, MODE_INSERT);
1476 break;
1477 case 12: /* XXX: SRM -- Send/Receive */
1478 break;
1479 case 20: /* LNM -- Linefeed/new line */
1480 MODBIT(term.mode, set, MODE_CRLF);
1481 break;
1482 default:
1483 fprintf(stderr,
1484 "erresc: unknown set/reset mode %d\n",
1485 *args);
1486 break;
1487 }
1488 }
1489 }
1490 }
1491 #undef MODBIT
1492
1493
1494 void
1495 csihandle(void) {
1496 switch(csiescseq.mode) {
1497 default:
1498 unknown:
1499 fprintf(stderr, "erresc: unknown csi ");
1500 csidump();
1501 /* die(""); */
1502 break;
1503 case '@': /* ICH -- Insert <n> blank char */
1504 DEFAULT(csiescseq.arg[0], 1);
1505 tinsertblank(csiescseq.arg[0]);
1506 break;
1507 case 'A': /* CUU -- Cursor <n> Up */
1508 case 'e':
1509 DEFAULT(csiescseq.arg[0], 1);
1510 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1511 break;
1512 case 'B': /* CUD -- Cursor <n> Down */
1513 DEFAULT(csiescseq.arg[0], 1);
1514 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1515 break;
1516 case 'c': /* DA -- Device Attributes */
1517 if(csiescseq.arg[0] == 0)
1518 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1519 break;
1520 case 'C': /* CUF -- Cursor <n> Forward */
1521 case 'a':
1522 DEFAULT(csiescseq.arg[0], 1);
1523 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1524 break;
1525 case 'D': /* CUB -- Cursor <n> Backward */
1526 DEFAULT(csiescseq.arg[0], 1);
1527 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1528 break;
1529 case 'E': /* CNL -- Cursor <n> Down and first col */
1530 DEFAULT(csiescseq.arg[0], 1);
1531 tmoveto(0, term.c.y+csiescseq.arg[0]);
1532 break;
1533 case 'F': /* CPL -- Cursor <n> Up and first col */
1534 DEFAULT(csiescseq.arg[0], 1);
1535 tmoveto(0, term.c.y-csiescseq.arg[0]);
1536 break;
1537 case 'g': /* TBC -- Tabulation clear */
1538 switch (csiescseq.arg[0]) {
1539 case 0: /* clear current tab stop */
1540 term.tabs[term.c.x] = 0;
1541 break;
1542 case 3: /* clear all the tabs */
1543 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1544 break;
1545 default:
1546 goto unknown;
1547 }
1548 break;
1549 case 'G': /* CHA -- Move to <col> */
1550 case '`': /* HPA */
1551 DEFAULT(csiescseq.arg[0], 1);
1552 tmoveto(csiescseq.arg[0]-1, term.c.y);
1553 break;
1554 case 'H': /* CUP -- Move to <row> <col> */
1555 case 'f': /* HVP */
1556 DEFAULT(csiescseq.arg[0], 1);
1557 DEFAULT(csiescseq.arg[1], 1);
1558 tmoveto(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1559 break;
1560 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1561 DEFAULT(csiescseq.arg[0], 1);
1562 while(csiescseq.arg[0]--)
1563 tputtab(1);
1564 break;
1565 case 'J': /* ED -- Clear screen */
1566 sel.bx = -1;
1567 switch(csiescseq.arg[0]) {
1568 case 0: /* below */
1569 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1570 if(term.c.y < term.row-1)
1571 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1572 break;
1573 case 1: /* above */
1574 if(term.c.y > 1)
1575 tclearregion(0, 0, term.col-1, term.c.y-1);
1576 tclearregion(0, term.c.y, term.c.x, term.c.y);
1577 break;
1578 case 2: /* all */
1579 tclearregion(0, 0, term.col-1, term.row-1);
1580 break;
1581 default:
1582 goto unknown;
1583 }
1584 break;
1585 case 'K': /* EL -- Clear line */
1586 switch(csiescseq.arg[0]) {
1587 case 0: /* right */
1588 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1589 break;
1590 case 1: /* left */
1591 tclearregion(0, term.c.y, term.c.x, term.c.y);
1592 break;
1593 case 2: /* all */
1594 tclearregion(0, term.c.y, term.col-1, term.c.y);
1595 break;
1596 }
1597 break;
1598 case 'S': /* SU -- Scroll <n> line up */
1599 DEFAULT(csiescseq.arg[0], 1);
1600 tscrollup(term.top, csiescseq.arg[0]);
1601 break;
1602 case 'T': /* SD -- Scroll <n> line down */
1603 DEFAULT(csiescseq.arg[0], 1);
1604 tscrolldown(term.top, csiescseq.arg[0]);
1605 break;
1606 case 'L': /* IL -- Insert <n> blank lines */
1607 DEFAULT(csiescseq.arg[0], 1);
1608 tinsertblankline(csiescseq.arg[0]);
1609 break;
1610 case 'l': /* RM -- Reset Mode */
1611 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1612 break;
1613 case 'M': /* DL -- Delete <n> lines */
1614 DEFAULT(csiescseq.arg[0], 1);
1615 tdeleteline(csiescseq.arg[0]);
1616 break;
1617 case 'X': /* ECH -- Erase <n> char */
1618 DEFAULT(csiescseq.arg[0], 1);
1619 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
1620 break;
1621 case 'P': /* DCH -- Delete <n> char */
1622 DEFAULT(csiescseq.arg[0], 1);
1623 tdeletechar(csiescseq.arg[0]);
1624 break;
1625 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1626 DEFAULT(csiescseq.arg[0], 1);
1627 while(csiescseq.arg[0]--)
1628 tputtab(0);
1629 break;
1630 case 'd': /* VPA -- Move to <row> */
1631 DEFAULT(csiescseq.arg[0], 1);
1632 tmoveto(term.c.x, csiescseq.arg[0]-1);
1633 break;
1634 case 'h': /* SM -- Set terminal mode */
1635 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1636 break;
1637 case 'm': /* SGR -- Terminal attribute (color) */
1638 tsetattr(csiescseq.arg, csiescseq.narg);
1639 break;
1640 case 'r': /* DECSTBM -- Set Scrolling Region */
1641 if(csiescseq.priv) {
1642 goto unknown;
1643 } else {
1644 DEFAULT(csiescseq.arg[0], 1);
1645 DEFAULT(csiescseq.arg[1], term.row);
1646 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1647 tmoveto(0, 0);
1648 }
1649 break;
1650 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1651 tcursor(CURSOR_SAVE);
1652 break;
1653 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1654 tcursor(CURSOR_LOAD);
1655 break;
1656 }
1657 }
1658
1659 void
1660 csidump(void) {
1661 int i;
1662 uint c;
1663
1664 printf("ESC[");
1665 for(i = 0; i < csiescseq.len; i++) {
1666 c = csiescseq.buf[i] & 0xff;
1667 if(isprint(c)) {
1668 putchar(c);
1669 } else if(c == '\n') {
1670 printf("(\\n)");
1671 } else if(c == '\r') {
1672 printf("(\\r)");
1673 } else if(c == 0x1b) {
1674 printf("(\\e)");
1675 } else {
1676 printf("(%02x)", c);
1677 }
1678 }
1679 putchar('\n');
1680 }
1681
1682 void
1683 csireset(void) {
1684 memset(&csiescseq, 0, sizeof(csiescseq));
1685 }
1686
1687 void
1688 strhandle(void) {
1689 char *p;
1690
1691 /*
1692 * TODO: make this being useful in case of color palette change.
1693 */
1694 strparse();
1695
1696 p = strescseq.buf;
1697
1698 switch(strescseq.type) {
1699 case ']': /* OSC -- Operating System Command */
1700 switch(p[0]) {
1701 case '0':
1702 case '1':
1703 case '2':
1704 /*
1705 * TODO: Handle special chars in string, like umlauts.
1706 */
1707 if(p[1] == ';') {
1708 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1709 }
1710 break;
1711 case ';':
1712 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1713 break;
1714 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1715 break;
1716 default:
1717 fprintf(stderr, "erresc: unknown str ");
1718 strdump();
1719 break;
1720 }
1721 break;
1722 case 'k': /* old title set compatibility */
1723 XStoreName(xw.dpy, xw.win, strescseq.buf);
1724 break;
1725 case 'P': /* DSC -- Device Control String */
1726 case '_': /* APC -- Application Program Command */
1727 case '^': /* PM -- Privacy Message */
1728 default:
1729 fprintf(stderr, "erresc: unknown str ");
1730 strdump();
1731 /* die(""); */
1732 break;
1733 }
1734 }
1735
1736 void
1737 strparse(void) {
1738 /*
1739 * TODO: Implement parsing like for CSI when required.
1740 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1741 */
1742 return;
1743 }
1744
1745 void
1746 strdump(void) {
1747 int i;
1748 uint c;
1749
1750 printf("ESC%c", strescseq.type);
1751 for(i = 0; i < strescseq.len; i++) {
1752 c = strescseq.buf[i] & 0xff;
1753 if(isprint(c)) {
1754 putchar(c);
1755 } else if(c == '\n') {
1756 printf("(\\n)");
1757 } else if(c == '\r') {
1758 printf("(\\r)");
1759 } else if(c == 0x1b) {
1760 printf("(\\e)");
1761 } else {
1762 printf("(%02x)", c);
1763 }
1764 }
1765 printf("ESC\\\n");
1766 }
1767
1768 void
1769 strreset(void) {
1770 memset(&strescseq, 0, sizeof(strescseq));
1771 }
1772
1773 void
1774 tputtab(bool forward) {
1775 uint x = term.c.x;
1776
1777 if(forward) {
1778 if(x == term.col)
1779 return;
1780 for(++x; x < term.col && !term.tabs[x]; ++x)
1781 /* nothing */ ;
1782 } else {
1783 if(x == 0)
1784 return;
1785 for(--x; x > 0 && !term.tabs[x]; --x)
1786 /* nothing */ ;
1787 }
1788 tmoveto(x, term.c.y);
1789 }
1790
1791 void
1792 tputc(char *c, int len) {
1793 uchar ascii = *c;
1794 bool control = ascii < '\x20' || ascii == 0177;
1795
1796 if(iofd != -1)
1797 write(iofd, c, len);
1798 /*
1799 * STR sequences must be checked before of anything
1800 * because it can use some control codes as part of the sequence
1801 */
1802 if(term.esc & ESC_STR) {
1803 switch(ascii) {
1804 case '\033':
1805 term.esc = ESC_START | ESC_STR_END;
1806 break;
1807 case '\a': /* backwards compatibility to xterm */
1808 term.esc = 0;
1809 strhandle();
1810 break;
1811 default:
1812 strescseq.buf[strescseq.len++] = ascii;
1813 if(strescseq.len+1 >= STR_BUF_SIZ) {
1814 term.esc = 0;
1815 strhandle();
1816 }
1817 }
1818 return;
1819 }
1820 /*
1821 * Actions of control codes must be performed as soon they arrive
1822 * because they can be embedded inside a control sequence, and
1823 * they must not cause conflicts with sequences.
1824 */
1825 if(control) {
1826 switch(ascii) {
1827 case '\t': /* HT */
1828 tputtab(1);
1829 return;
1830 case '\b': /* BS */
1831 tmoveto(term.c.x-1, term.c.y);
1832 return;
1833 case '\r': /* CR */
1834 tmoveto(0, term.c.y);
1835 return;
1836 case '\f': /* LF */
1837 case '\v': /* VT */
1838 case '\n': /* LF */
1839 /* go to first col if the mode is set */
1840 tnewline(IS_SET(MODE_CRLF));
1841 return;
1842 case '\a': /* BEL */
1843 if(!(xw.state & WIN_FOCUSED))
1844 xseturgency(1);
1845 return;
1846 case '\033': /* ESC */
1847 csireset();
1848 term.esc = ESC_START;
1849 return;
1850 case '\016': /* SO */
1851 term.c.attr.mode |= ATTR_GFX;
1852 return;
1853 case '\017': /* SI */
1854 term.c.attr.mode &= ~ATTR_GFX;
1855 return;
1856 case '\032': /* SUB */
1857 case '\030': /* CAN */
1858 csireset();
1859 return;
1860 case '\005': /* ENQ (IGNORED) */
1861 case '\000': /* NUL (IGNORED) */
1862 case '\021': /* XON (IGNORED) */
1863 case '\023': /* XOFF (IGNORED) */
1864 case 0177: /* DEL (IGNORED) */
1865 return;
1866 }
1867 } else if(term.esc & ESC_START) {
1868 if(term.esc & ESC_CSI) {
1869 csiescseq.buf[csiescseq.len++] = ascii;
1870 if(BETWEEN(ascii, 0x40, 0x7E)
1871 || csiescseq.len >= ESC_BUF_SIZ) {
1872 term.esc = 0;
1873 csiparse(), csihandle();
1874 }
1875 } else if(term.esc & ESC_STR_END) {
1876 term.esc = 0;
1877 if(ascii == '\\')
1878 strhandle();
1879 } else if(term.esc & ESC_ALTCHARSET) {
1880 switch(ascii) {
1881 case '0': /* Line drawing set */
1882 term.c.attr.mode |= ATTR_GFX;
1883 break;
1884 case 'B': /* USASCII */
1885 term.c.attr.mode &= ~ATTR_GFX;
1886 break;
1887 case 'A': /* UK (IGNORED) */
1888 case '<': /* multinational charset (IGNORED) */
1889 case '5': /* Finnish (IGNORED) */
1890 case 'C': /* Finnish (IGNORED) */
1891 case 'K': /* German (IGNORED) */
1892 break;
1893 default:
1894 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1895 }
1896 term.esc = 0;
1897 } else if(term.esc & ESC_TEST) {
1898 if(ascii == '8') { /* DEC screen alignment test. */
1899 char E[UTF_SIZ] = "E";
1900 int x, y;
1901
1902 for(x = 0; x < term.col; ++x) {
1903 for(y = 0; y < term.row; ++y)
1904 tsetchar(E, &term.c.attr, x, y);
1905 }
1906 }
1907 term.esc = 0;
1908 } else {
1909 switch(ascii) {
1910 case '[':
1911 term.esc |= ESC_CSI;
1912 break;
1913 case '#':
1914 term.esc |= ESC_TEST;
1915 break;
1916 case 'P': /* DCS -- Device Control String */
1917 case '_': /* APC -- Application Program Command */
1918 case '^': /* PM -- Privacy Message */
1919 case ']': /* OSC -- Operating System Command */
1920 case 'k': /* old title set compatibility */
1921 strreset();
1922 strescseq.type = ascii;
1923 term.esc |= ESC_STR;
1924 break;
1925 case '(': /* set primary charset G0 */
1926 term.esc |= ESC_ALTCHARSET;
1927 break;
1928 case ')': /* set secondary charset G1 (IGNORED) */
1929 case '*': /* set tertiary charset G2 (IGNORED) */
1930 case '+': /* set quaternary charset G3 (IGNORED) */
1931 term.esc = 0;
1932 break;
1933 case 'D': /* IND -- Linefeed */
1934 if(term.c.y == term.bot) {
1935 tscrollup(term.top, 1);
1936 } else {
1937 tmoveto(term.c.x, term.c.y+1);
1938 }
1939 term.esc = 0;
1940 break;
1941 case 'E': /* NEL -- Next line */
1942 tnewline(1); /* always go to first col */
1943 term.esc = 0;
1944 break;
1945 case 'H': /* HTS -- Horizontal tab stop */
1946 term.tabs[term.c.x] = 1;
1947 term.esc = 0;
1948 break;
1949 case 'M': /* RI -- Reverse index */
1950 if(term.c.y == term.top) {
1951 tscrolldown(term.top, 1);
1952 } else {
1953 tmoveto(term.c.x, term.c.y-1);
1954 }
1955 term.esc = 0;
1956 break;
1957 case 'Z': /* DECID -- Identify Terminal */
1958 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1959 term.esc = 0;
1960 break;
1961 case 'c': /* RIS -- Reset to inital state */
1962 treset();
1963 term.esc = 0;
1964 xresettitle();
1965 break;
1966 case '=': /* DECPAM -- Application keypad */
1967 term.mode |= MODE_APPKEYPAD;
1968 term.esc = 0;
1969 break;
1970 case '>': /* DECPNM -- Normal keypad */
1971 term.mode &= ~MODE_APPKEYPAD;
1972 term.esc = 0;
1973 break;
1974 case '7': /* DECSC -- Save Cursor */
1975 tcursor(CURSOR_SAVE);
1976 term.esc = 0;
1977 break;
1978 case '8': /* DECRC -- Restore Cursor */
1979 tcursor(CURSOR_LOAD);
1980 term.esc = 0;
1981 break;
1982 case '\\': /* ST -- Stop */
1983 term.esc = 0;
1984 break;
1985 default:
1986 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
1987 (uchar) ascii, isprint(ascii)? ascii:'.');
1988 term.esc = 0;
1989 }
1990 }
1991 /*
1992 * All characters which forms part of a sequence are not
1993 * printed
1994 */
1995 return;
1996 }
1997 /*
1998 * Display control codes only if we are in graphic mode
1999 */
2000 if(control && !(term.c.attr.mode & ATTR_GFX))
2001 return;
2002 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2003 sel.bx = -1;
2004 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2005 tnewline(1); /* always go to first col */
2006 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2007 if(term.c.x+1 < term.col)
2008 tmoveto(term.c.x+1, term.c.y);
2009 else
2010 term.c.state |= CURSOR_WRAPNEXT;
2011 }
2012
2013 int
2014 tresize(int col, int row) {
2015 int i, x;
2016 int minrow = MIN(row, term.row);
2017 int mincol = MIN(col, term.col);
2018 int slide = term.c.y - row + 1;
2019 bool *bp;
2020
2021 if(col < 1 || row < 1)
2022 return 0;
2023
2024 /* free unneeded rows */
2025 i = 0;
2026 if(slide > 0) {
2027 /* slide screen to keep cursor where we expect it -
2028 * tscrollup would work here, but we can optimize to
2029 * memmove because we're freeing the earlier lines */
2030 for(/* i = 0 */; i < slide; i++) {
2031 free(term.line[i]);
2032 free(term.alt[i]);
2033 }
2034 memmove(term.line, term.line + slide, row * sizeof(Line));
2035 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2036 }
2037 for(i += row; i < term.row; i++) {
2038 free(term.line[i]);
2039 free(term.alt[i]);
2040 }
2041
2042 /* resize to new height */
2043 term.line = xrealloc(term.line, row * sizeof(Line));
2044 term.alt = xrealloc(term.alt, row * sizeof(Line));
2045 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2046 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2047
2048 /* resize each row to new width, zero-pad if needed */
2049 for(i = 0; i < minrow; i++) {
2050 term.dirty[i] = 1;
2051 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2052 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2053 for(x = mincol; x < col; x++) {
2054 term.line[i][x].state = 0;
2055 term.alt[i][x].state = 0;
2056 }
2057 }
2058
2059 /* allocate any new rows */
2060 for(/* i == minrow */; i < row; i++) {
2061 term.dirty[i] = 1;
2062 term.line[i] = xcalloc(col, sizeof(Glyph));
2063 term.alt [i] = xcalloc(col, sizeof(Glyph));
2064 }
2065 if(col > term.col) {
2066 bp = term.tabs + term.col;
2067
2068 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2069 while(--bp > term.tabs && !*bp)
2070 /* nothing */ ;
2071 for(bp += TAB; bp < term.tabs + col; bp += TAB)
2072 *bp = 1;
2073 }
2074 /* update terminal size */
2075 term.col = col, term.row = row;
2076 /* make use of the LIMIT in tmoveto */
2077 tmoveto(term.c.x, term.c.y);
2078 /* reset scrolling region */
2079 tsetscroll(0, row-1);
2080
2081 return (slide > 0);
2082 }
2083
2084 void
2085 xresize(int col, int row) {
2086 xw.tw = MAX(1, 2*BORDER + col * xw.cw);
2087 xw.th = MAX(1, 2*BORDER + row * xw.ch);
2088
2089 XftDrawChange(xw.xft_draw, xw.buf);
2090 }
2091
2092 void
2093 xloadcols(void) {
2094 int i, r, g, b;
2095 XRenderColor xft_color = { .alpha = 0 };
2096
2097 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2098 for(i = 0; i < LEN(colorname); i++) {
2099 if(!colorname[i])
2100 continue;
2101 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.xft_col[i])) {
2102 die("Could not allocate color '%s'\n", colorname[i]);
2103 }
2104 }
2105
2106 /* load colors [16-255] ; same colors as xterm */
2107 for(i = 16, r = 0; r < 6; r++) {
2108 for(g = 0; g < 6; g++) {
2109 for(b = 0; b < 6; b++) {
2110 xft_color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
2111 xft_color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
2112 xft_color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
2113 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &xft_color, &dc.xft_col[i])) {
2114 die("Could not allocate color %d\n", i);
2115 }
2116 i++;
2117 }
2118 }
2119 }
2120
2121 for(r = 0; r < 24; r++, i++) {
2122 xft_color.red = xft_color.green = xft_color.blue = 0x0808 + 0x0a0a * r;
2123 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &xft_color,
2124 &dc.xft_col[i])) {
2125 die("Could not allocate color %d\n", i);
2126 }
2127 }
2128 }
2129
2130 void
2131 xtermclear(int col1, int row1, int col2, int row2) {
2132 XftDrawRect(xw.xft_draw,
2133 &dc.xft_col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG],
2134 BORDER + col1 * xw.cw,
2135 BORDER + row1 * xw.ch,
2136 (col2-col1+1) * xw.cw,
2137 (row2-row1+1) * xw.ch);
2138 }
2139
2140 /*
2141 * Absolute coordinates.
2142 */
2143 void
2144 xclear(int x1, int y1, int x2, int y2) {
2145 XftDrawRect(xw.xft_draw,
2146 &dc.xft_col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG],
2147 x1, y1, x2-x1, y2-y1);
2148 }
2149
2150 void
2151 xhints(void) {
2152 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
2153 XWMHints wm = {.flags = InputHint, .input = 1};
2154 XSizeHints *sizeh = NULL;
2155
2156 sizeh = XAllocSizeHints();
2157 if(xw.isfixed == False) {
2158 sizeh->flags = PSize | PResizeInc | PBaseSize;
2159 sizeh->height = xw.h;
2160 sizeh->width = xw.w;
2161 sizeh->height_inc = xw.ch;
2162 sizeh->width_inc = xw.cw;
2163 sizeh->base_height = 2*BORDER;
2164 sizeh->base_width = 2*BORDER;
2165 } else {
2166 sizeh->flags = PMaxSize | PMinSize;
2167 sizeh->min_width = sizeh->max_width = xw.fw;
2168 sizeh->min_height = sizeh->max_height = xw.fh;
2169 }
2170
2171 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2172 XFree(sizeh);
2173 }
2174
2175 void
2176 xinitfont(Font *f, char *fontstr) {
2177 FcPattern *pattern, *match;
2178 FcResult result;
2179
2180 pattern = FcNameParse((FcChar8 *)fontstr);
2181 if(!pattern)
2182 die("st: can't open font %s\n", fontstr);
2183
2184 match = XftFontMatch(xw.dpy, xw.scr, pattern, &result);
2185 FcPatternDestroy(pattern);
2186 if(!match)
2187 die("st: can't open font %s\n", fontstr);
2188 if(!(f->xft_set = XftFontOpenPattern(xw.dpy, match))) {
2189 FcPatternDestroy(match);
2190 die("st: can't open font %s.\n", fontstr);
2191 }
2192
2193 f->ascent = f->xft_set->ascent;
2194 f->descent = f->xft_set->descent;
2195 f->lbearing = 0;
2196 f->rbearing = f->xft_set->max_advance_width;
2197
2198 f->height = f->xft_set->height;
2199 f->width = f->lbearing + f->rbearing;
2200 }
2201
2202 void
2203 initfonts(char *fontstr) {
2204 char *fstr;
2205
2206 xinitfont(&dc.font, fontstr);
2207 xw.cw = dc.font.width;
2208 xw.ch = dc.font.height;
2209
2210 fstr = smstrcat(fontstr, ":weight=bold", NULL);
2211 xinitfont(&dc.bfont, fstr);
2212 free(fstr);
2213
2214 fstr = smstrcat(fontstr, ":slant=italic,oblique", NULL);
2215 xinitfont(&dc.ifont, fstr);
2216 free(fstr);
2217
2218 fstr = smstrcat(fontstr, ":weight=bold:slant=italic,oblique", NULL);
2219 xinitfont(&dc.ibfont, fstr);
2220 free(fstr);
2221 }
2222
2223 void
2224 xinit(void) {
2225 XSetWindowAttributes attrs;
2226 Cursor cursor;
2227 Window parent;
2228 int sw, sh, major, minor;
2229
2230 if(!(xw.dpy = XOpenDisplay(NULL)))
2231 die("Can't open display\n");
2232 xw.scr = XDefaultScreen(xw.dpy);
2233 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2234
2235 /* font */
2236 initfonts((opt_font != NULL)? opt_font : FONT);
2237
2238 /* colors */
2239 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2240 xloadcols();
2241
2242 /* adjust fixed window geometry */
2243 if(xw.isfixed) {
2244 sw = DisplayWidth(xw.dpy, xw.scr);
2245 sh = DisplayHeight(xw.dpy, xw.scr);
2246 if(xw.fx < 0)
2247 xw.fx = sw + xw.fx - xw.fw - 1;
2248 if(xw.fy < 0)
2249 xw.fy = sh + xw.fy - xw.fh - 1;
2250
2251 xw.h = xw.fh;
2252 xw.w = xw.fw;
2253 } else {
2254 /* window - default size */
2255 xw.h = 2*BORDER + term.row * xw.ch;
2256 xw.w = 2*BORDER + term.col * xw.cw;
2257 xw.fx = 0;
2258 xw.fy = 0;
2259 }
2260
2261 attrs.background_pixel = dc.xft_col[DefaultBG].pixel;
2262 attrs.border_pixel = dc.xft_col[DefaultBG].pixel;
2263 attrs.bit_gravity = NorthWestGravity;
2264 attrs.event_mask = FocusChangeMask | KeyPressMask
2265 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2266 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2267 attrs.colormap = xw.cmap;
2268
2269 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
2270 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2271 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2272 xw.vis,
2273 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2274 | CWColormap,
2275 &attrs);
2276
2277 /* double buffering */
2278 if(!XdbeQueryExtension(xw.dpy, &major, &minor))
2279 die("Xdbe extension is not present\n");
2280 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
2281
2282 /* Xft rendering context */
2283 xw.xft_draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2284
2285 /* input methods */
2286 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
2287 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2288 | XIMStatusNothing, XNClientWindow, xw.win,
2289 XNFocusWindow, xw.win, NULL);
2290 /* gc */
2291 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
2292
2293 /* white cursor, black outline */
2294 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2295 XDefineCursor(xw.dpy, xw.win, cursor);
2296 XRecolorCursor(xw.dpy, cursor,
2297 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2298 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2299
2300 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2301 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2302 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2303
2304 xresettitle();
2305 XMapWindow(xw.dpy, xw.win);
2306 xhints();
2307 XSync(xw.dpy, 0);
2308 }
2309
2310 void
2311 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2312 int winx = BORDER + x * xw.cw, winy = BORDER + y * xw.ch,
2313 width = charlen * xw.cw;
2314 Font *font = &dc.font;
2315 XGlyphInfo extents;
2316 XftColor *fg = &dc.xft_col[base.fg], *bg = &dc.xft_col[base.bg],
2317 *temp, revfg, revbg;
2318 XRenderColor colfg, colbg;
2319
2320 if(base.mode & ATTR_REVERSE)
2321 temp = fg, fg = bg, bg = temp;
2322
2323 if(base.mode & ATTR_BOLD) {
2324 if(BETWEEN(base.fg, 0, 7)) {
2325 /* basic system colors */
2326 fg = &dc.xft_col[base.fg + 8];
2327 } else if(BETWEEN(base.fg, 16, 195)) {
2328 /* 256 colors */
2329 fg = &dc.xft_col[base.fg + 36];
2330 } else if(BETWEEN(base.fg, 232, 251)) {
2331 /* greyscale */
2332 fg = &dc.xft_col[base.fg + 4];
2333 }
2334 /*
2335 * Those ranges will not be brightened:
2336 * 8 - 15 – bright system colors
2337 * 196 - 231 – highest 256 color cube
2338 * 252 - 255 – brightest colors in greyscale
2339 */
2340 font = &dc.bfont;
2341 }
2342
2343 if(base.mode & ATTR_ITALIC)
2344 font = &dc.ifont;
2345 if(base.mode & (ATTR_ITALIC|ATTR_ITALIC))
2346 font = &dc.ibfont;
2347
2348 if(IS_SET(MODE_REVERSE)) {
2349 if(fg == &dc.xft_col[DefaultFG]) {
2350 fg = &dc.xft_col[DefaultBG];
2351 } else {
2352 colfg.red = ~fg->color.red;
2353 colfg.green = ~fg->color.green;
2354 colfg.blue = ~fg->color.blue;
2355 colfg.alpha = fg->color.alpha;
2356 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2357 fg = &revfg;
2358 }
2359
2360 if(bg == &dc.xft_col[DefaultBG]) {
2361 bg = &dc.xft_col[DefaultFG];
2362 } else {
2363 colbg.red = ~bg->color.red;
2364 colbg.green = ~bg->color.green;
2365 colbg.blue = ~bg->color.blue;
2366 colbg.alpha = bg->color.alpha;
2367 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2368 bg = &revbg;
2369 }
2370 }
2371
2372 XftTextExtentsUtf8(xw.dpy, font->xft_set, (FcChar8 *)s, bytelen,
2373 &extents);
2374 width = extents.xOff;
2375
2376 /* Intelligent cleaning up of the borders. */
2377 if(x == 0) {
2378 xclear(0, (y == 0)? 0 : winy, BORDER,
2379 winy + xw.ch + (y == term.row-1)? xw.h : 0);
2380 }
2381 if(x + charlen >= term.col-1) {
2382 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2383 (y == term.row-1)? xw.h : (winy + xw.ch));
2384 }
2385 if(y == 0)
2386 xclear(winx, 0, winx + width, BORDER);
2387 if(y == term.row-1)
2388 xclear(winx, winy + xw.ch, winx + width, xw.h);
2389
2390 XftDrawRect(xw.xft_draw, bg, winx, winy, width, xw.ch);
2391 XftDrawStringUtf8(xw.xft_draw, fg, font->xft_set, winx,
2392 winy + font->ascent, (FcChar8 *)s, bytelen);
2393
2394 if(base.mode & ATTR_UNDERLINE) {
2395 XftDrawRect(xw.xft_draw, fg, winx, winy + font->ascent + 1,
2396 width, 1);
2397 }
2398 }
2399
2400 void
2401 xdrawcursor(void) {
2402 static int oldx = 0, oldy = 0;
2403 int sl;
2404 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
2405
2406 LIMIT(oldx, 0, term.col-1);
2407 LIMIT(oldy, 0, term.row-1);
2408
2409 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2410 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2411
2412 /* remove the old cursor */
2413 if(term.line[oldy][oldx].state & GLYPH_SET) {
2414 sl = utf8size(term.line[oldy][oldx].c);
2415 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2416 oldy, 1, sl);
2417 } else {
2418 xtermclear(oldx, oldy, oldx, oldy);
2419 }
2420
2421 /* draw the new one */
2422 if(!(term.c.state & CURSOR_HIDE)) {
2423 if(!(xw.state & WIN_FOCUSED))
2424 g.bg = DefaultUCS;
2425
2426 if(IS_SET(MODE_REVERSE))
2427 g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
2428
2429 sl = utf8size(g.c);
2430 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2431 oldx = term.c.x, oldy = term.c.y;
2432 }
2433 }
2434
2435 void
2436 xresettitle(void) {
2437 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
2438 }
2439
2440 void
2441 redraw(void) {
2442 struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
2443
2444 tfulldirt();
2445 draw();
2446 XSync(xw.dpy, False); /* necessary for a good tput flash */
2447 nanosleep(&tv, NULL);
2448 }
2449
2450 void
2451 draw(void) {
2452 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2453
2454 drawregion(0, 0, term.col, term.row);
2455 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2456 }
2457
2458 void
2459 drawregion(int x1, int y1, int x2, int y2) {
2460 int ic, ib, x, y, ox, sl;
2461 Glyph base, new;
2462 char buf[DRAW_BUF_SIZ];
2463 bool ena_sel = sel.bx != -1, alt = IS_SET(MODE_ALTSCREEN);
2464
2465 if((sel.alt && !alt) || (!sel.alt && alt))
2466 ena_sel = 0;
2467 if(!(xw.state & WIN_VISIBLE))
2468 return;
2469
2470 for(y = y1; y < y2; y++) {
2471 if(!term.dirty[y])
2472 continue;
2473
2474 xtermclear(0, y, term.col, y);
2475 term.dirty[y] = 0;
2476 base = term.line[y][0];
2477 ic = ib = ox = 0;
2478 for(x = x1; x < x2; x++) {
2479 new = term.line[y][x];
2480 if(ena_sel && *(new.c) && selected(x, y))
2481 new.mode ^= ATTR_REVERSE;
2482 if(ib > 0 && (!(new.state & GLYPH_SET)
2483 || ATTRCMP(base, new)
2484 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2485 xdraws(buf, base, ox, y, ic, ib);
2486 ic = ib = 0;
2487 }
2488 if(new.state & GLYPH_SET) {
2489 if(ib == 0) {
2490 ox = x;
2491 base = new;
2492 }
2493 sl = utf8size(new.c);
2494 memcpy(buf+ib, new.c, sl);
2495 ib += sl;
2496 ++ic;
2497 }
2498 }
2499 if(ib > 0)
2500 xdraws(buf, base, ox, y, ic, ib);
2501 }
2502 xdrawcursor();
2503 }
2504
2505 void
2506 expose(XEvent *ev) {
2507 XExposeEvent *e = &ev->xexpose;
2508
2509 if(xw.state & WIN_REDRAW) {
2510 if(!e->count)
2511 xw.state &= ~WIN_REDRAW;
2512 }
2513 }
2514
2515 void
2516 visibility(XEvent *ev) {
2517 XVisibilityEvent *e = &ev->xvisibility;
2518
2519 if(e->state == VisibilityFullyObscured) {
2520 xw.state &= ~WIN_VISIBLE;
2521 } else if(!(xw.state & WIN_VISIBLE)) {
2522 /* need a full redraw for next Expose, not just a buf copy */
2523 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2524 }
2525 }
2526
2527 void
2528 unmap(XEvent *ev) {
2529 xw.state &= ~WIN_VISIBLE;
2530 }
2531
2532 void
2533 xseturgency(int add) {
2534 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2535
2536 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2537 XSetWMHints(xw.dpy, xw.win, h);
2538 XFree(h);
2539 }
2540
2541 void
2542 focus(XEvent *ev) {
2543 if(ev->type == FocusIn) {
2544 xw.state |= WIN_FOCUSED;
2545 xseturgency(0);
2546 } else {
2547 xw.state &= ~WIN_FOCUSED;
2548 }
2549 }
2550
2551 char*
2552 kmap(KeySym k, uint state) {
2553 int i;
2554 uint mask;
2555
2556 state &= ~Mod2Mask;
2557 for(i = 0; i < LEN(key); i++) {
2558 mask = key[i].mask;
2559
2560 if(key[i].k == k && ((state & mask) == mask
2561 || (mask == XK_NO_MOD && !state))) {
2562 return (char*)key[i].s;
2563 }
2564 }
2565 return NULL;
2566 }
2567
2568 void
2569 kpress(XEvent *ev) {
2570 XKeyEvent *e = &ev->xkey;
2571 KeySym ksym;
2572 char buf[32];
2573 char *customkey;
2574 int len;
2575 int meta;
2576 int shift;
2577 Status status;
2578
2579 if (IS_SET(MODE_KBDLOCK))
2580 return;
2581
2582 meta = e->state & Mod1Mask;
2583 shift = e->state & ShiftMask;
2584 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
2585
2586 /* 1. custom keys from config.h */
2587 if((customkey = kmap(ksym, e->state))) {
2588 ttywrite(customkey, strlen(customkey));
2589 /* 2. hardcoded (overrides X lookup) */
2590 } else {
2591 switch(ksym) {
2592 case XK_Up:
2593 case XK_Down:
2594 case XK_Left:
2595 case XK_Right:
2596 /* XXX: shift up/down doesn't work */
2597 sprintf(buf, "\033%c%c",
2598 IS_SET(MODE_APPKEYPAD) ? 'O' : '[',
2599 (shift ? "dacb":"DACB")[ksym - XK_Left]);
2600 ttywrite(buf, 3);
2601 break;
2602 case XK_Insert:
2603 if(shift)
2604 selpaste();
2605 break;
2606 case XK_Return:
2607 if(IS_SET(MODE_CRLF)) {
2608 ttywrite("\r\n", 2);
2609 } else {
2610 ttywrite("\r", 1);
2611 }
2612 break;
2613 /* 3. X lookup */
2614 default:
2615 if(len > 0) {
2616 if(meta && len == 1)
2617 ttywrite("\033", 1);
2618 ttywrite(buf, len);
2619 }
2620 break;
2621 }
2622 }
2623 }
2624
2625 void
2626 cmessage(XEvent *e) {
2627 /* See xembed specs
2628 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2629 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2630 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2631 xw.state |= WIN_FOCUSED;
2632 xseturgency(0);
2633 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2634 xw.state &= ~WIN_FOCUSED;
2635 }
2636 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
2637 /* Send SIGHUP to shell */
2638 kill(pid, SIGHUP);
2639 exit(EXIT_SUCCESS);
2640 }
2641 }
2642
2643 void
2644 resize(XEvent *e) {
2645 int col, row;
2646
2647 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2648 return;
2649
2650 xw.w = e->xconfigure.width;
2651 xw.h = e->xconfigure.height;
2652 col = (xw.w - 2*BORDER) / xw.cw;
2653 row = (xw.h - 2*BORDER) / xw.ch;
2654 if(col == term.col && row == term.row)
2655 return;
2656
2657 tresize(col, row);
2658 xresize(col, row);
2659 ttyresize();
2660 }
2661
2662 void
2663 run(void) {
2664 XEvent ev;
2665 fd_set rfd;
2666 int xfd = XConnectionNumber(xw.dpy), i;
2667 struct timeval drawtimeout, *tv = NULL;
2668
2669 for(i = 0;; i++) {
2670 FD_ZERO(&rfd);
2671 FD_SET(cmdfd, &rfd);
2672 FD_SET(xfd, &rfd);
2673 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
2674 if(errno == EINTR)
2675 continue;
2676 die("select failed: %s\n", SERRNO);
2677 }
2678
2679 /*
2680 * Stop after a certain number of reads so the user does not
2681 * feel like the system is stuttering.
2682 */
2683 if(i < 1000 && FD_ISSET(cmdfd, &rfd)) {
2684 ttyread();
2685
2686 /*
2687 * Just wait a bit so it isn't disturbing the
2688 * user and the system is able to write something.
2689 */
2690 drawtimeout.tv_sec = 0;
2691 drawtimeout.tv_usec = 5;
2692 tv = &drawtimeout;
2693 continue;
2694 }
2695 i = 0;
2696 tv = NULL;
2697
2698 while(XPending(xw.dpy)) {
2699 XNextEvent(xw.dpy, &ev);
2700 if(XFilterEvent(&ev, xw.win))
2701 continue;
2702 if(handler[ev.type])
2703 (handler[ev.type])(&ev);
2704 }
2705
2706 draw();
2707 XFlush(xw.dpy);
2708 }
2709 }
2710
2711 int
2712 main(int argc, char *argv[]) {
2713 int i, bitm, xr, yr;
2714 uint wr, hr;
2715
2716 xw.fw = xw.fh = xw.fx = xw.fy = 0;
2717 xw.isfixed = False;
2718
2719 for(i = 1; i < argc; i++) {
2720 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2721 case 'c':
2722 if(++i < argc)
2723 opt_class = argv[i];
2724 break;
2725 case 'e':
2726 /* eat every remaining arguments */
2727 if(++i < argc)
2728 opt_cmd = &argv[i];
2729 goto run;
2730 case 'f':
2731 if(++i < argc)
2732 opt_font = argv[i];
2733 break;
2734 case 'g':
2735 if(++i >= argc)
2736 break;
2737
2738 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
2739 if(bitm & XValue)
2740 xw.fx = xr;
2741 if(bitm & YValue)
2742 xw.fy = yr;
2743 if(bitm & WidthValue)
2744 xw.fw = (int)wr;
2745 if(bitm & HeightValue)
2746 xw.fh = (int)hr;
2747 if(bitm & XNegative && xw.fx == 0)
2748 xw.fx = -1;
2749 if(bitm & XNegative && xw.fy == 0)
2750 xw.fy = -1;
2751
2752 if(xw.fh != 0 && xw.fw != 0)
2753 xw.isfixed = True;
2754 break;
2755 case 'o':
2756 if(++i < argc)
2757 opt_io = argv[i];
2758 break;
2759 case 't':
2760 if(++i < argc)
2761 opt_title = argv[i];
2762 break;
2763 case 'v':
2764 default:
2765 die(USAGE);
2766 case 'w':
2767 if(++i < argc)
2768 opt_embed = argv[i];
2769 break;
2770 }
2771 }
2772
2773 run:
2774 setlocale(LC_CTYPE, "");
2775 tnew(80, 24);
2776 ttynew();
2777 xinit();
2778 selinit();
2779 run();
2780 return 0;
2781 }
2782
simple terminal