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[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 <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 if (envshell == NULL)
869 envshell ="/bin/sh";
870
871 unsetenv("COLUMNS");
872 unsetenv("LINES");
873 unsetenv("TERMCAP");
874
875 signal(SIGCHLD, SIG_DFL);
876 signal(SIGHUP, SIG_DFL);
877 signal(SIGINT, SIG_DFL);
878 signal(SIGQUIT, SIG_DFL);
879 signal(SIGTERM, SIG_DFL);
880 signal(SIGALRM, SIG_DFL);
881
882 DEFAULT(envshell, SHELL);
883 putenv("TERM="TNAME);
884 args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
885 execvp(args[0], args);
886 exit(EXIT_FAILURE);
887 }
888
889 void
890 sigchld(int a) {
891 int stat = 0;
892
893 if(waitpid(pid, &stat, 0) < 0)
894 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
895
896 if(WIFEXITED(stat)) {
897 exit(WEXITSTATUS(stat));
898 } else {
899 exit(EXIT_FAILURE);
900 }
901 }
902
903 void
904 ttynew(void) {
905 int m, s;
906 struct winsize w = {term.row, term.col, 0, 0};
907
908 /* seems to work fine on linux, openbsd and freebsd */
909 if(openpty(&m, &s, NULL, NULL, &w) < 0)
910 die("openpty failed: %s\n", SERRNO);
911
912 switch(pid = fork()) {
913 case -1:
914 die("fork failed\n");
915 break;
916 case 0:
917 setsid(); /* create a new process group */
918 dup2(s, STDIN_FILENO);
919 dup2(s, STDOUT_FILENO);
920 dup2(s, STDERR_FILENO);
921 if(ioctl(s, TIOCSCTTY, NULL) < 0)
922 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
923 close(s);
924 close(m);
925 execsh();
926 break;
927 default:
928 close(s);
929 cmdfd = m;
930 signal(SIGCHLD, sigchld);
931 if(opt_io) {
932 if(!strcmp(opt_io, "-")) {
933 iofd = STDOUT_FILENO;
934 } else {
935 if((iofd = open(opt_io, O_WRONLY | O_CREAT, 0666)) < 0) {
936 fprintf(stderr, "Error opening %s:%s\n",
937 opt_io, strerror(errno));
938 }
939 }
940 }
941 }
942 }
943
944 void
945 dump(char c) {
946 static int col;
947
948 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
949 if(++col % 10 == 0)
950 fprintf(stderr, "\n");
951 }
952
953 void
954 ttyread(void) {
955 static char buf[BUFSIZ];
956 static int buflen = 0;
957 char *ptr;
958 char s[UTF_SIZ];
959 int charsize; /* size of utf8 char in bytes */
960 long utf8c;
961 int ret;
962
963 /* append read bytes to unprocessed bytes */
964 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
965 die("Couldn't read from shell: %s\n", SERRNO);
966
967 /* process every complete utf8 char */
968 buflen += ret;
969 ptr = buf;
970 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
971 charsize = utf8decode(ptr, &utf8c);
972 utf8encode(&utf8c, s);
973 tputc(s, charsize);
974 ptr += charsize;
975 buflen -= charsize;
976 }
977
978 /* keep any uncomplete utf8 char for the next call */
979 memmove(buf, ptr, buflen);
980 }
981
982 void
983 ttywrite(const char *s, size_t n) {
984 if(write(cmdfd, s, n) == -1)
985 die("write error on tty: %s\n", SERRNO);
986 }
987
988 void
989 ttyresize(void) {
990 struct winsize w;
991
992 w.ws_row = term.row;
993 w.ws_col = term.col;
994 w.ws_xpixel = xw.tw;
995 w.ws_ypixel = xw.th;
996 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
997 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
998 }
999
1000 void
1001 tsetdirt(int top, int bot) {
1002 int i;
1003
1004 LIMIT(top, 0, term.row-1);
1005 LIMIT(bot, 0, term.row-1);
1006
1007 for(i = top; i <= bot; i++)
1008 term.dirty[i] = 1;
1009 }
1010
1011 void
1012 tfulldirt(void) {
1013 tsetdirt(0, term.row-1);
1014 }
1015
1016 void
1017 tcursor(int mode) {
1018 static TCursor c;
1019
1020 if(mode == CURSOR_SAVE) {
1021 c = term.c;
1022 } else if(mode == CURSOR_LOAD) {
1023 term.c = c;
1024 tmoveto(c.x, c.y);
1025 }
1026 }
1027
1028 void
1029 treset(void) {
1030 uint i;
1031
1032 term.c = (TCursor){{
1033 .mode = ATTR_NULL,
1034 .fg = DefaultFG,
1035 .bg = DefaultBG
1036 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1037
1038 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1039 for(i = TAB; i < term.col; i += TAB)
1040 term.tabs[i] = 1;
1041 term.top = 0;
1042 term.bot = term.row - 1;
1043 term.mode = MODE_WRAP;
1044
1045 tclearregion(0, 0, term.col-1, term.row-1);
1046 }
1047
1048 void
1049 tnew(int col, int row) {
1050 /* set screen size */
1051 term.row = row;
1052 term.col = col;
1053 term.line = xmalloc(term.row * sizeof(Line));
1054 term.alt = xmalloc(term.row * sizeof(Line));
1055 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
1056 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
1057
1058 for(row = 0; row < term.row; row++) {
1059 term.line[row] = xmalloc(term.col * sizeof(Glyph));
1060 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
1061 term.dirty[row] = 0;
1062 }
1063 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1064 /* setup screen */
1065 treset();
1066 }
1067
1068 void
1069 tswapscreen(void) {
1070 Line *tmp = term.line;
1071
1072 term.line = term.alt;
1073 term.alt = tmp;
1074 term.mode ^= MODE_ALTSCREEN;
1075 tfulldirt();
1076 }
1077
1078 void
1079 tscrolldown(int orig, int n) {
1080 int i;
1081 Line temp;
1082
1083 LIMIT(n, 0, term.bot-orig+1);
1084
1085 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1086
1087 for(i = term.bot; i >= orig+n; i--) {
1088 temp = term.line[i];
1089 term.line[i] = term.line[i-n];
1090 term.line[i-n] = temp;
1091
1092 term.dirty[i] = 1;
1093 term.dirty[i-n] = 1;
1094 }
1095
1096 selscroll(orig, n);
1097 }
1098
1099 void
1100 tscrollup(int orig, int n) {
1101 int i;
1102 Line temp;
1103 LIMIT(n, 0, term.bot-orig+1);
1104
1105 tclearregion(0, orig, term.col-1, orig+n-1);
1106
1107 for(i = orig; i <= term.bot-n; i++) {
1108 temp = term.line[i];
1109 term.line[i] = term.line[i+n];
1110 term.line[i+n] = temp;
1111
1112 term.dirty[i] = 1;
1113 term.dirty[i+n] = 1;
1114 }
1115
1116 selscroll(orig, -n);
1117 }
1118
1119 void
1120 selscroll(int orig, int n) {
1121 if(sel.bx == -1)
1122 return;
1123
1124 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1125 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1126 sel.bx = -1;
1127 return;
1128 }
1129 if(sel.by < term.top) {
1130 sel.by = term.top;
1131 sel.bx = 0;
1132 }
1133 if(sel.ey > term.bot) {
1134 sel.ey = term.bot;
1135 sel.ex = term.col;
1136 }
1137 sel.b.y = sel.by, sel.b.x = sel.bx;
1138 sel.e.y = sel.ey, sel.e.x = sel.ex;
1139 }
1140 }
1141
1142 void
1143 tnewline(int first_col) {
1144 int y = term.c.y;
1145
1146 if(y == term.bot) {
1147 tscrollup(term.top, 1);
1148 } else {
1149 y++;
1150 }
1151 tmoveto(first_col ? 0 : term.c.x, y);
1152 }
1153
1154 void
1155 csiparse(void) {
1156 /* int noarg = 1; */
1157 char *p = csiescseq.buf;
1158
1159 csiescseq.narg = 0;
1160 if(*p == '?')
1161 csiescseq.priv = 1, p++;
1162
1163 while(p < csiescseq.buf+csiescseq.len) {
1164 while(isdigit(*p)) {
1165 csiescseq.arg[csiescseq.narg] *= 10;
1166 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1167 }
1168 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ) {
1169 csiescseq.narg++, p++;
1170 } else {
1171 csiescseq.mode = *p;
1172 csiescseq.narg++;
1173
1174 return;
1175 }
1176 }
1177 }
1178
1179 void
1180 tmoveto(int x, int y) {
1181 LIMIT(x, 0, term.col-1);
1182 LIMIT(y, 0, term.row-1);
1183 term.c.state &= ~CURSOR_WRAPNEXT;
1184 term.c.x = x;
1185 term.c.y = y;
1186 }
1187
1188 void
1189 tsetchar(char *c, Glyph *attr, int x, int y) {
1190 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1191 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1192 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1193 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1194 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1195 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1196 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1197 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1198 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1199 };
1200
1201 /*
1202 * The table is proudly stolen from rxvt.
1203 */
1204 if(attr->mode & ATTR_GFX) {
1205 if(c[0] >= 0x41 && c[0] <= 0x7e
1206 && vt100_0[c[0] - 0x41]) {
1207 c = vt100_0[c[0] - 0x41];
1208 }
1209 }
1210
1211 term.dirty[y] = 1;
1212 term.line[y][x] = *attr;
1213 memcpy(term.line[y][x].c, c, UTF_SIZ);
1214 term.line[y][x].state |= GLYPH_SET;
1215 }
1216
1217 void
1218 tclearregion(int x1, int y1, int x2, int y2) {
1219 int x, y, temp;
1220
1221 if(x1 > x2)
1222 temp = x1, x1 = x2, x2 = temp;
1223 if(y1 > y2)
1224 temp = y1, y1 = y2, y2 = temp;
1225
1226 LIMIT(x1, 0, term.col-1);
1227 LIMIT(x2, 0, term.col-1);
1228 LIMIT(y1, 0, term.row-1);
1229 LIMIT(y2, 0, term.row-1);
1230
1231 for(y = y1; y <= y2; y++) {
1232 term.dirty[y] = 1;
1233 for(x = x1; x <= x2; x++)
1234 term.line[y][x].state = 0;
1235 }
1236 }
1237
1238 void
1239 tdeletechar(int n) {
1240 int src = term.c.x + n;
1241 int dst = term.c.x;
1242 int size = term.col - src;
1243
1244 term.dirty[term.c.y] = 1;
1245
1246 if(src >= term.col) {
1247 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1248 return;
1249 }
1250
1251 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1252 size * sizeof(Glyph));
1253 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1254 }
1255
1256 void
1257 tinsertblank(int n) {
1258 int src = term.c.x;
1259 int dst = src + n;
1260 int size = term.col - dst;
1261
1262 term.dirty[term.c.y] = 1;
1263
1264 if(dst >= term.col) {
1265 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1266 return;
1267 }
1268
1269 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1270 size * sizeof(Glyph));
1271 tclearregion(src, term.c.y, dst - 1, term.c.y);
1272 }
1273
1274 void
1275 tinsertblankline(int n) {
1276 if(term.c.y < term.top || term.c.y > term.bot)
1277 return;
1278
1279 tscrolldown(term.c.y, n);
1280 }
1281
1282 void
1283 tdeleteline(int n) {
1284 if(term.c.y < term.top || term.c.y > term.bot)
1285 return;
1286
1287 tscrollup(term.c.y, n);
1288 }
1289
1290 void
1291 tsetattr(int *attr, int l) {
1292 int i;
1293
1294 for(i = 0; i < l; i++) {
1295 switch(attr[i]) {
1296 case 0:
1297 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1298 | ATTR_ITALIC | ATTR_BLINK);
1299 term.c.attr.fg = DefaultFG;
1300 term.c.attr.bg = DefaultBG;
1301 break;
1302 case 1:
1303 term.c.attr.mode |= ATTR_BOLD;
1304 break;
1305 case 3: /* enter standout (highlight) */
1306 term.c.attr.mode |= ATTR_ITALIC;
1307 break;
1308 case 4:
1309 term.c.attr.mode |= ATTR_UNDERLINE;
1310 break;
1311 case 5:
1312 term.c.attr.mode |= ATTR_BLINK;
1313 break;
1314 case 7:
1315 term.c.attr.mode |= ATTR_REVERSE;
1316 break;
1317 case 21:
1318 case 22:
1319 term.c.attr.mode &= ~ATTR_BOLD;
1320 break;
1321 case 23: /* leave standout (highlight) mode */
1322 term.c.attr.mode &= ~ATTR_ITALIC;
1323 break;
1324 case 24:
1325 term.c.attr.mode &= ~ATTR_UNDERLINE;
1326 break;
1327 case 25:
1328 term.c.attr.mode &= ~ATTR_BLINK;
1329 break;
1330 case 27:
1331 term.c.attr.mode &= ~ATTR_REVERSE;
1332 break;
1333 case 38:
1334 if(i + 2 < l && attr[i + 1] == 5) {
1335 i += 2;
1336 if(BETWEEN(attr[i], 0, 255)) {
1337 term.c.attr.fg = attr[i];
1338 } else {
1339 fprintf(stderr,
1340 "erresc: bad fgcolor %d\n",
1341 attr[i]);
1342 }
1343 } else {
1344 fprintf(stderr,
1345 "erresc(38): gfx attr %d unknown\n",
1346 attr[i]);
1347 }
1348 break;
1349 case 39:
1350 term.c.attr.fg = DefaultFG;
1351 break;
1352 case 48:
1353 if(i + 2 < l && attr[i + 1] == 5) {
1354 i += 2;
1355 if(BETWEEN(attr[i], 0, 255)) {
1356 term.c.attr.bg = attr[i];
1357 } else {
1358 fprintf(stderr,
1359 "erresc: bad bgcolor %d\n",
1360 attr[i]);
1361 }
1362 } else {
1363 fprintf(stderr,
1364 "erresc(48): gfx attr %d unknown\n",
1365 attr[i]);
1366 }
1367 break;
1368 case 49:
1369 term.c.attr.bg = DefaultBG;
1370 break;
1371 default:
1372 if(BETWEEN(attr[i], 30, 37)) {
1373 term.c.attr.fg = attr[i] - 30;
1374 } else if(BETWEEN(attr[i], 40, 47)) {
1375 term.c.attr.bg = attr[i] - 40;
1376 } else if(BETWEEN(attr[i], 90, 97)) {
1377 term.c.attr.fg = attr[i] - 90 + 8;
1378 } else if(BETWEEN(attr[i], 100, 107)) {
1379 term.c.attr.bg = attr[i] - 100 + 8;
1380 } else {
1381 fprintf(stderr,
1382 "erresc(default): gfx attr %d unknown\n",
1383 attr[i]), csidump();
1384 }
1385 break;
1386 }
1387 }
1388 }
1389
1390 void
1391 tsetscroll(int t, int b) {
1392 int temp;
1393
1394 LIMIT(t, 0, term.row-1);
1395 LIMIT(b, 0, term.row-1);
1396 if(t > b) {
1397 temp = t;
1398 t = b;
1399 b = temp;
1400 }
1401 term.top = t;
1402 term.bot = b;
1403 }
1404
1405 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1406
1407 void
1408 tsetmode(bool priv, bool set, int *args, int narg) {
1409 int *lim, mode;
1410
1411 for(lim = args + narg; args < lim; ++args) {
1412 if(priv) {
1413 switch(*args) {
1414 break;
1415 case 1: /* DECCKM -- Cursor key */
1416 MODBIT(term.mode, set, MODE_APPKEYPAD);
1417 break;
1418 case 5: /* DECSCNM -- Reverse video */
1419 mode = term.mode;
1420 MODBIT(term.mode, set, MODE_REVERSE);
1421 if(mode != term.mode)
1422 redraw();
1423 break;
1424 case 6: /* XXX: DECOM -- Origin */
1425 break;
1426 case 7: /* DECAWM -- Auto wrap */
1427 MODBIT(term.mode, set, MODE_WRAP);
1428 break;
1429 case 8: /* XXX: DECARM -- Auto repeat */
1430 break;
1431 case 0: /* Error (IGNORED) */
1432 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1433 break;
1434 case 25:
1435 MODBIT(term.c.state, !set, CURSOR_HIDE);
1436 break;
1437 case 1000: /* 1000,1002: enable xterm mouse report */
1438 MODBIT(term.mode, set, MODE_MOUSEBTN);
1439 break;
1440 case 1002:
1441 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1442 break;
1443 case 1049: /* = 1047 and 1048 */
1444 case 47:
1445 case 1047:
1446 if(IS_SET(MODE_ALTSCREEN))
1447 tclearregion(0, 0, term.col-1, term.row-1);
1448 if((set && !IS_SET(MODE_ALTSCREEN)) ||
1449 (!set && IS_SET(MODE_ALTSCREEN))) {
1450 tswapscreen();
1451 }
1452 if(*args != 1049)
1453 break;
1454 /* pass through */
1455 case 1048:
1456 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1457 break;
1458 default:
1459 /* case 2: DECANM -- ANSI/VT52 (NOT SUPPOURTED) */
1460 /* case 3: DECCOLM -- Column (NOT SUPPORTED) */
1461 /* case 4: DECSCLM -- Scroll (NOT SUPPORTED) */
1462 /* case 18: DECPFF -- Printer feed (NOT SUPPORTED) */
1463 /* case 19: DECPEX -- Printer extent (NOT SUPPORTED) */
1464 /* case 42: DECNRCM -- National characters (NOT SUPPORTED) */
1465 fprintf(stderr,
1466 "erresc: unknown private set/reset mode %d\n",
1467 *args);
1468 break;
1469 }
1470 } else {
1471 switch(*args) {
1472 case 0: /* Error (IGNORED) */
1473 break;
1474 case 2: /* KAM -- keyboard action */
1475 MODBIT(term.mode, set, MODE_KBDLOCK);
1476 break;
1477 case 4: /* IRM -- Insertion-replacement */
1478 MODBIT(term.mode, set, MODE_INSERT);
1479 break;
1480 case 12: /* XXX: SRM -- Send/Receive */
1481 break;
1482 case 20: /* LNM -- Linefeed/new line */
1483 MODBIT(term.mode, set, MODE_CRLF);
1484 break;
1485 default:
1486 fprintf(stderr,
1487 "erresc: unknown set/reset mode %d\n",
1488 *args);
1489 break;
1490 }
1491 }
1492 }
1493 }
1494 #undef MODBIT
1495
1496
1497 void
1498 csihandle(void) {
1499 switch(csiescseq.mode) {
1500 default:
1501 unknown:
1502 fprintf(stderr, "erresc: unknown csi ");
1503 csidump();
1504 /* die(""); */
1505 break;
1506 case '@': /* ICH -- Insert <n> blank char */
1507 DEFAULT(csiescseq.arg[0], 1);
1508 tinsertblank(csiescseq.arg[0]);
1509 break;
1510 case 'A': /* CUU -- Cursor <n> Up */
1511 case 'e':
1512 DEFAULT(csiescseq.arg[0], 1);
1513 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1514 break;
1515 case 'B': /* CUD -- Cursor <n> Down */
1516 DEFAULT(csiescseq.arg[0], 1);
1517 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1518 break;
1519 case 'c': /* DA -- Device Attributes */
1520 if(csiescseq.arg[0] == 0)
1521 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1522 break;
1523 case 'C': /* CUF -- Cursor <n> Forward */
1524 case 'a':
1525 DEFAULT(csiescseq.arg[0], 1);
1526 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1527 break;
1528 case 'D': /* CUB -- Cursor <n> Backward */
1529 DEFAULT(csiescseq.arg[0], 1);
1530 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1531 break;
1532 case 'E': /* CNL -- Cursor <n> Down and first col */
1533 DEFAULT(csiescseq.arg[0], 1);
1534 tmoveto(0, term.c.y+csiescseq.arg[0]);
1535 break;
1536 case 'F': /* CPL -- Cursor <n> Up and first col */
1537 DEFAULT(csiescseq.arg[0], 1);
1538 tmoveto(0, term.c.y-csiescseq.arg[0]);
1539 break;
1540 case 'g': /* TBC -- Tabulation clear */
1541 switch (csiescseq.arg[0]) {
1542 case 0: /* clear current tab stop */
1543 term.tabs[term.c.x] = 0;
1544 break;
1545 case 3: /* clear all the tabs */
1546 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1547 break;
1548 default:
1549 goto unknown;
1550 }
1551 break;
1552 case 'G': /* CHA -- Move to <col> */
1553 case '`': /* HPA */
1554 DEFAULT(csiescseq.arg[0], 1);
1555 tmoveto(csiescseq.arg[0]-1, term.c.y);
1556 break;
1557 case 'H': /* CUP -- Move to <row> <col> */
1558 case 'f': /* HVP */
1559 DEFAULT(csiescseq.arg[0], 1);
1560 DEFAULT(csiescseq.arg[1], 1);
1561 tmoveto(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1562 break;
1563 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1564 DEFAULT(csiescseq.arg[0], 1);
1565 while(csiescseq.arg[0]--)
1566 tputtab(1);
1567 break;
1568 case 'J': /* ED -- Clear screen */
1569 sel.bx = -1;
1570 switch(csiescseq.arg[0]) {
1571 case 0: /* below */
1572 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1573 if(term.c.y < term.row-1)
1574 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1575 break;
1576 case 1: /* above */
1577 if(term.c.y > 1)
1578 tclearregion(0, 0, term.col-1, term.c.y-1);
1579 tclearregion(0, term.c.y, term.c.x, term.c.y);
1580 break;
1581 case 2: /* all */
1582 tclearregion(0, 0, term.col-1, term.row-1);
1583 break;
1584 default:
1585 goto unknown;
1586 }
1587 break;
1588 case 'K': /* EL -- Clear line */
1589 switch(csiescseq.arg[0]) {
1590 case 0: /* right */
1591 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1592 break;
1593 case 1: /* left */
1594 tclearregion(0, term.c.y, term.c.x, term.c.y);
1595 break;
1596 case 2: /* all */
1597 tclearregion(0, term.c.y, term.col-1, term.c.y);
1598 break;
1599 }
1600 break;
1601 case 'S': /* SU -- Scroll <n> line up */
1602 DEFAULT(csiescseq.arg[0], 1);
1603 tscrollup(term.top, csiescseq.arg[0]);
1604 break;
1605 case 'T': /* SD -- Scroll <n> line down */
1606 DEFAULT(csiescseq.arg[0], 1);
1607 tscrolldown(term.top, csiescseq.arg[0]);
1608 break;
1609 case 'L': /* IL -- Insert <n> blank lines */
1610 DEFAULT(csiescseq.arg[0], 1);
1611 tinsertblankline(csiescseq.arg[0]);
1612 break;
1613 case 'l': /* RM -- Reset Mode */
1614 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1615 break;
1616 case 'M': /* DL -- Delete <n> lines */
1617 DEFAULT(csiescseq.arg[0], 1);
1618 tdeleteline(csiescseq.arg[0]);
1619 break;
1620 case 'X': /* ECH -- Erase <n> char */
1621 DEFAULT(csiescseq.arg[0], 1);
1622 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
1623 break;
1624 case 'P': /* DCH -- Delete <n> char */
1625 DEFAULT(csiescseq.arg[0], 1);
1626 tdeletechar(csiescseq.arg[0]);
1627 break;
1628 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1629 DEFAULT(csiescseq.arg[0], 1);
1630 while(csiescseq.arg[0]--)
1631 tputtab(0);
1632 break;
1633 case 'd': /* VPA -- Move to <row> */
1634 DEFAULT(csiescseq.arg[0], 1);
1635 tmoveto(term.c.x, csiescseq.arg[0]-1);
1636 break;
1637 case 'h': /* SM -- Set terminal mode */
1638 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1639 break;
1640 case 'm': /* SGR -- Terminal attribute (color) */
1641 tsetattr(csiescseq.arg, csiescseq.narg);
1642 break;
1643 case 'r': /* DECSTBM -- Set Scrolling Region */
1644 if(csiescseq.priv) {
1645 goto unknown;
1646 } else {
1647 DEFAULT(csiescseq.arg[0], 1);
1648 DEFAULT(csiescseq.arg[1], term.row);
1649 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1650 tmoveto(0, 0);
1651 }
1652 break;
1653 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1654 tcursor(CURSOR_SAVE);
1655 break;
1656 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1657 tcursor(CURSOR_LOAD);
1658 break;
1659 }
1660 }
1661
1662 void
1663 csidump(void) {
1664 int i;
1665 uint c;
1666
1667 printf("ESC[");
1668 for(i = 0; i < csiescseq.len; i++) {
1669 c = csiescseq.buf[i] & 0xff;
1670 if(isprint(c)) {
1671 putchar(c);
1672 } else if(c == '\n') {
1673 printf("(\\n)");
1674 } else if(c == '\r') {
1675 printf("(\\r)");
1676 } else if(c == 0x1b) {
1677 printf("(\\e)");
1678 } else {
1679 printf("(%02x)", c);
1680 }
1681 }
1682 putchar('\n');
1683 }
1684
1685 void
1686 csireset(void) {
1687 memset(&csiescseq, 0, sizeof(csiescseq));
1688 }
1689
1690 void
1691 strhandle(void) {
1692 char *p;
1693
1694 /*
1695 * TODO: make this being useful in case of color palette change.
1696 */
1697 strparse();
1698
1699 p = strescseq.buf;
1700
1701 switch(strescseq.type) {
1702 case ']': /* OSC -- Operating System Command */
1703 switch(p[0]) {
1704 case '0':
1705 case '1':
1706 case '2':
1707 /*
1708 * TODO: Handle special chars in string, like umlauts.
1709 */
1710 if(p[1] == ';') {
1711 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1712 }
1713 break;
1714 case ';':
1715 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1716 break;
1717 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1718 break;
1719 default:
1720 fprintf(stderr, "erresc: unknown str ");
1721 strdump();
1722 break;
1723 }
1724 break;
1725 case 'k': /* old title set compatibility */
1726 XStoreName(xw.dpy, xw.win, strescseq.buf);
1727 break;
1728 case 'P': /* DSC -- Device Control String */
1729 case '_': /* APC -- Application Program Command */
1730 case '^': /* PM -- Privacy Message */
1731 default:
1732 fprintf(stderr, "erresc: unknown str ");
1733 strdump();
1734 /* die(""); */
1735 break;
1736 }
1737 }
1738
1739 void
1740 strparse(void) {
1741 /*
1742 * TODO: Implement parsing like for CSI when required.
1743 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1744 */
1745 return;
1746 }
1747
1748 void
1749 strdump(void) {
1750 int i;
1751 uint c;
1752
1753 printf("ESC%c", strescseq.type);
1754 for(i = 0; i < strescseq.len; i++) {
1755 c = strescseq.buf[i] & 0xff;
1756 if(isprint(c)) {
1757 putchar(c);
1758 } else if(c == '\n') {
1759 printf("(\\n)");
1760 } else if(c == '\r') {
1761 printf("(\\r)");
1762 } else if(c == 0x1b) {
1763 printf("(\\e)");
1764 } else {
1765 printf("(%02x)", c);
1766 }
1767 }
1768 printf("ESC\\\n");
1769 }
1770
1771 void
1772 strreset(void) {
1773 memset(&strescseq, 0, sizeof(strescseq));
1774 }
1775
1776 void
1777 tputtab(bool forward) {
1778 uint x = term.c.x;
1779
1780 if(forward) {
1781 if(x == term.col)
1782 return;
1783 for(++x; x < term.col && !term.tabs[x]; ++x)
1784 /* nothing */ ;
1785 } else {
1786 if(x == 0)
1787 return;
1788 for(--x; x > 0 && !term.tabs[x]; --x)
1789 /* nothing */ ;
1790 }
1791 tmoveto(x, term.c.y);
1792 }
1793
1794 void
1795 tputc(char *c, int len) {
1796 uchar ascii = *c;
1797 bool control = ascii < '\x20' || ascii == 0177;
1798
1799 if(iofd != -1)
1800 write(iofd, c, len);
1801 /*
1802 * STR sequences must be checked before of anything
1803 * because it can use some control codes as part of the sequence
1804 */
1805 if(term.esc & ESC_STR) {
1806 switch(ascii) {
1807 case '\033':
1808 term.esc = ESC_START | ESC_STR_END;
1809 break;
1810 case '\a': /* backwards compatibility to xterm */
1811 term.esc = 0;
1812 strhandle();
1813 break;
1814 default:
1815 strescseq.buf[strescseq.len++] = ascii;
1816 if(strescseq.len+1 >= STR_BUF_SIZ) {
1817 term.esc = 0;
1818 strhandle();
1819 }
1820 }
1821 return;
1822 }
1823 /*
1824 * Actions of control codes must be performed as soon they arrive
1825 * because they can be embedded inside a control sequence, and
1826 * they must not cause conflicts with sequences.
1827 */
1828 if(control) {
1829 switch(ascii) {
1830 case '\t': /* HT */
1831 tputtab(1);
1832 return;
1833 case '\b': /* BS */
1834 tmoveto(term.c.x-1, term.c.y);
1835 return;
1836 case '\r': /* CR */
1837 tmoveto(0, term.c.y);
1838 return;
1839 case '\f': /* LF */
1840 case '\v': /* VT */
1841 case '\n': /* LF */
1842 /* go to first col if the mode is set */
1843 tnewline(IS_SET(MODE_CRLF));
1844 return;
1845 case '\a': /* BEL */
1846 if(!(xw.state & WIN_FOCUSED))
1847 xseturgency(1);
1848 return;
1849 case '\033': /* ESC */
1850 csireset();
1851 term.esc = ESC_START;
1852 return;
1853 case '\016': /* SO */
1854 term.c.attr.mode |= ATTR_GFX;
1855 return;
1856 case '\017': /* SI */
1857 term.c.attr.mode &= ~ATTR_GFX;
1858 return;
1859 case '\032': /* SUB */
1860 case '\030': /* CAN */
1861 csireset();
1862 return;
1863 case '\005': /* ENQ (IGNORED) */
1864 case '\000': /* NUL (IGNORED) */
1865 case '\021': /* XON (IGNORED) */
1866 case '\023': /* XOFF (IGNORED) */
1867 case 0177: /* DEL (IGNORED) */
1868 return;
1869 }
1870 } else if(term.esc & ESC_START) {
1871 if(term.esc & ESC_CSI) {
1872 csiescseq.buf[csiescseq.len++] = ascii;
1873 if(BETWEEN(ascii, 0x40, 0x7E)
1874 || csiescseq.len >= ESC_BUF_SIZ) {
1875 term.esc = 0;
1876 csiparse(), csihandle();
1877 }
1878 } else if(term.esc & ESC_STR_END) {
1879 term.esc = 0;
1880 if(ascii == '\\')
1881 strhandle();
1882 } else if(term.esc & ESC_ALTCHARSET) {
1883 switch(ascii) {
1884 case '0': /* Line drawing set */
1885 term.c.attr.mode |= ATTR_GFX;
1886 break;
1887 case 'B': /* USASCII */
1888 term.c.attr.mode &= ~ATTR_GFX;
1889 break;
1890 case 'A': /* UK (IGNORED) */
1891 case '<': /* multinational charset (IGNORED) */
1892 case '5': /* Finnish (IGNORED) */
1893 case 'C': /* Finnish (IGNORED) */
1894 case 'K': /* German (IGNORED) */
1895 break;
1896 default:
1897 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1898 }
1899 term.esc = 0;
1900 } else if(term.esc & ESC_TEST) {
1901 if(ascii == '8') { /* DEC screen alignment test. */
1902 char E[UTF_SIZ] = "E";
1903 int x, y;
1904
1905 for(x = 0; x < term.col; ++x) {
1906 for(y = 0; y < term.row; ++y)
1907 tsetchar(E, &term.c.attr, x, y);
1908 }
1909 }
1910 term.esc = 0;
1911 } else {
1912 switch(ascii) {
1913 case '[':
1914 term.esc |= ESC_CSI;
1915 break;
1916 case '#':
1917 term.esc |= ESC_TEST;
1918 break;
1919 case 'P': /* DCS -- Device Control String */
1920 case '_': /* APC -- Application Program Command */
1921 case '^': /* PM -- Privacy Message */
1922 case ']': /* OSC -- Operating System Command */
1923 case 'k': /* old title set compatibility */
1924 strreset();
1925 strescseq.type = ascii;
1926 term.esc |= ESC_STR;
1927 break;
1928 case '(': /* set primary charset G0 */
1929 term.esc |= ESC_ALTCHARSET;
1930 break;
1931 case ')': /* set secondary charset G1 (IGNORED) */
1932 case '*': /* set tertiary charset G2 (IGNORED) */
1933 case '+': /* set quaternary charset G3 (IGNORED) */
1934 term.esc = 0;
1935 break;
1936 case 'D': /* IND -- Linefeed */
1937 if(term.c.y == term.bot) {
1938 tscrollup(term.top, 1);
1939 } else {
1940 tmoveto(term.c.x, term.c.y+1);
1941 }
1942 term.esc = 0;
1943 break;
1944 case 'E': /* NEL -- Next line */
1945 tnewline(1); /* always go to first col */
1946 term.esc = 0;
1947 break;
1948 case 'H': /* HTS -- Horizontal tab stop */
1949 term.tabs[term.c.x] = 1;
1950 term.esc = 0;
1951 break;
1952 case 'M': /* RI -- Reverse index */
1953 if(term.c.y == term.top) {
1954 tscrolldown(term.top, 1);
1955 } else {
1956 tmoveto(term.c.x, term.c.y-1);
1957 }
1958 term.esc = 0;
1959 break;
1960 case 'Z': /* DECID -- Identify Terminal */
1961 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1962 term.esc = 0;
1963 break;
1964 case 'c': /* RIS -- Reset to inital state */
1965 treset();
1966 term.esc = 0;
1967 xresettitle();
1968 break;
1969 case '=': /* DECPAM -- Application keypad */
1970 term.mode |= MODE_APPKEYPAD;
1971 term.esc = 0;
1972 break;
1973 case '>': /* DECPNM -- Normal keypad */
1974 term.mode &= ~MODE_APPKEYPAD;
1975 term.esc = 0;
1976 break;
1977 case '7': /* DECSC -- Save Cursor */
1978 tcursor(CURSOR_SAVE);
1979 term.esc = 0;
1980 break;
1981 case '8': /* DECRC -- Restore Cursor */
1982 tcursor(CURSOR_LOAD);
1983 term.esc = 0;
1984 break;
1985 case '\\': /* ST -- Stop */
1986 term.esc = 0;
1987 break;
1988 default:
1989 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
1990 (uchar) ascii, isprint(ascii)? ascii:'.');
1991 term.esc = 0;
1992 }
1993 }
1994 /*
1995 * All characters which forms part of a sequence are not
1996 * printed
1997 */
1998 return;
1999 }
2000 /*
2001 * Display control codes only if we are in graphic mode
2002 */
2003 if(control && !(term.c.attr.mode & ATTR_GFX))
2004 return;
2005 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2006 sel.bx = -1;
2007 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2008 tnewline(1); /* always go to first col */
2009 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2010 if(term.c.x+1 < term.col)
2011 tmoveto(term.c.x+1, term.c.y);
2012 else
2013 term.c.state |= CURSOR_WRAPNEXT;
2014 }
2015
2016 int
2017 tresize(int col, int row) {
2018 int i, x;
2019 int minrow = MIN(row, term.row);
2020 int mincol = MIN(col, term.col);
2021 int slide = term.c.y - row + 1;
2022 bool *bp;
2023
2024 if(col < 1 || row < 1)
2025 return 0;
2026
2027 /* free unneeded rows */
2028 i = 0;
2029 if(slide > 0) {
2030 /* slide screen to keep cursor where we expect it -
2031 * tscrollup would work here, but we can optimize to
2032 * memmove because we're freeing the earlier lines */
2033 for(/* i = 0 */; i < slide; i++) {
2034 free(term.line[i]);
2035 free(term.alt[i]);
2036 }
2037 memmove(term.line, term.line + slide, row * sizeof(Line));
2038 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2039 }
2040 for(i += row; i < term.row; i++) {
2041 free(term.line[i]);
2042 free(term.alt[i]);
2043 }
2044
2045 /* resize to new height */
2046 term.line = xrealloc(term.line, row * sizeof(Line));
2047 term.alt = xrealloc(term.alt, row * sizeof(Line));
2048 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2049 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2050
2051 /* resize each row to new width, zero-pad if needed */
2052 for(i = 0; i < minrow; i++) {
2053 term.dirty[i] = 1;
2054 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2055 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2056 for(x = mincol; x < col; x++) {
2057 term.line[i][x].state = 0;
2058 term.alt[i][x].state = 0;
2059 }
2060 }
2061
2062 /* allocate any new rows */
2063 for(/* i == minrow */; i < row; i++) {
2064 term.dirty[i] = 1;
2065 term.line[i] = xcalloc(col, sizeof(Glyph));
2066 term.alt [i] = xcalloc(col, sizeof(Glyph));
2067 }
2068 if(col > term.col) {
2069 bp = term.tabs + term.col;
2070
2071 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2072 while(--bp > term.tabs && !*bp)
2073 /* nothing */ ;
2074 for(bp += TAB; bp < term.tabs + col; bp += TAB)
2075 *bp = 1;
2076 }
2077 /* update terminal size */
2078 term.col = col, term.row = row;
2079 /* make use of the LIMIT in tmoveto */
2080 tmoveto(term.c.x, term.c.y);
2081 /* reset scrolling region */
2082 tsetscroll(0, row-1);
2083
2084 return (slide > 0);
2085 }
2086
2087 void
2088 xresize(int col, int row) {
2089 xw.tw = MAX(1, 2*BORDER + col * xw.cw);
2090 xw.th = MAX(1, 2*BORDER + row * xw.ch);
2091
2092 XftDrawChange(xw.xft_draw, xw.buf);
2093 }
2094
2095 void
2096 xloadcols(void) {
2097 int i, r, g, b;
2098 XRenderColor xft_color = { .alpha = 0 };
2099
2100 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2101 for(i = 0; i < LEN(colorname); i++) {
2102 if(!colorname[i])
2103 continue;
2104 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.xft_col[i])) {
2105 die("Could not allocate color '%s'\n", colorname[i]);
2106 }
2107 }
2108
2109 /* load colors [16-255] ; same colors as xterm */
2110 for(i = 16, r = 0; r < 6; r++) {
2111 for(g = 0; g < 6; g++) {
2112 for(b = 0; b < 6; b++) {
2113 xft_color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
2114 xft_color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
2115 xft_color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
2116 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &xft_color, &dc.xft_col[i])) {
2117 die("Could not allocate color %d\n", i);
2118 }
2119 i++;
2120 }
2121 }
2122 }
2123
2124 for(r = 0; r < 24; r++, i++) {
2125 xft_color.red = xft_color.green = xft_color.blue = 0x0808 + 0x0a0a * r;
2126 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &xft_color,
2127 &dc.xft_col[i])) {
2128 die("Could not allocate color %d\n", i);
2129 }
2130 }
2131 }
2132
2133 void
2134 xtermclear(int col1, int row1, int col2, int row2) {
2135 XftDrawRect(xw.xft_draw,
2136 &dc.xft_col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG],
2137 BORDER + col1 * xw.cw,
2138 BORDER + row1 * xw.ch,
2139 (col2-col1+1) * xw.cw,
2140 (row2-row1+1) * xw.ch);
2141 }
2142
2143 /*
2144 * Absolute coordinates.
2145 */
2146 void
2147 xclear(int x1, int y1, int x2, int y2) {
2148 XftDrawRect(xw.xft_draw,
2149 &dc.xft_col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG],
2150 x1, y1, x2-x1, y2-y1);
2151 }
2152
2153 void
2154 xhints(void) {
2155 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
2156 XWMHints wm = {.flags = InputHint, .input = 1};
2157 XSizeHints *sizeh = NULL;
2158
2159 sizeh = XAllocSizeHints();
2160 if(xw.isfixed == False) {
2161 sizeh->flags = PSize | PResizeInc | PBaseSize;
2162 sizeh->height = xw.h;
2163 sizeh->width = xw.w;
2164 sizeh->height_inc = xw.ch;
2165 sizeh->width_inc = xw.cw;
2166 sizeh->base_height = 2*BORDER;
2167 sizeh->base_width = 2*BORDER;
2168 } else {
2169 sizeh->flags = PMaxSize | PMinSize;
2170 sizeh->min_width = sizeh->max_width = xw.fw;
2171 sizeh->min_height = sizeh->max_height = xw.fh;
2172 }
2173
2174 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2175 XFree(sizeh);
2176 }
2177
2178 void
2179 xinitfont(Font *f, char *fontstr) {
2180 FcPattern *pattern, *match;
2181 FcResult result;
2182
2183 pattern = FcNameParse((FcChar8 *)fontstr);
2184 if(!pattern)
2185 die("st: can't open font %s\n", fontstr);
2186
2187 match = XftFontMatch(xw.dpy, xw.scr, pattern, &result);
2188 FcPatternDestroy(pattern);
2189 if(!match)
2190 die("st: can't open font %s\n", fontstr);
2191 if(!(f->xft_set = XftFontOpenPattern(xw.dpy, match))) {
2192 FcPatternDestroy(match);
2193 die("st: can't open font %s.\n", fontstr);
2194 }
2195
2196 f->ascent = f->xft_set->ascent;
2197 f->descent = f->xft_set->descent;
2198 f->lbearing = 0;
2199 f->rbearing = f->xft_set->max_advance_width;
2200
2201 f->height = f->xft_set->height;
2202 f->width = f->lbearing + f->rbearing;
2203 }
2204
2205 void
2206 initfonts(char *fontstr) {
2207 char *fstr;
2208
2209 xinitfont(&dc.font, fontstr);
2210 xw.cw = dc.font.width;
2211 xw.ch = dc.font.height;
2212
2213 fstr = smstrcat(fontstr, ":weight=bold", NULL);
2214 xinitfont(&dc.bfont, fstr);
2215 free(fstr);
2216
2217 fstr = smstrcat(fontstr, ":slant=italic,oblique", NULL);
2218 xinitfont(&dc.ifont, fstr);
2219 free(fstr);
2220
2221 fstr = smstrcat(fontstr, ":weight=bold:slant=italic,oblique", NULL);
2222 xinitfont(&dc.ibfont, fstr);
2223 free(fstr);
2224 }
2225
2226 void
2227 xinit(void) {
2228 XSetWindowAttributes attrs;
2229 Cursor cursor;
2230 Window parent;
2231 int sw, sh, major, minor;
2232
2233 if(!(xw.dpy = XOpenDisplay(NULL)))
2234 die("Can't open display\n");
2235 xw.scr = XDefaultScreen(xw.dpy);
2236 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2237
2238 /* font */
2239 initfonts((opt_font != NULL)? opt_font : FONT);
2240
2241 /* colors */
2242 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2243 xloadcols();
2244
2245 /* adjust fixed window geometry */
2246 if(xw.isfixed) {
2247 sw = DisplayWidth(xw.dpy, xw.scr);
2248 sh = DisplayHeight(xw.dpy, xw.scr);
2249 if(xw.fx < 0)
2250 xw.fx = sw + xw.fx - xw.fw - 1;
2251 if(xw.fy < 0)
2252 xw.fy = sh + xw.fy - xw.fh - 1;
2253
2254 xw.h = xw.fh;
2255 xw.w = xw.fw;
2256 } else {
2257 /* window - default size */
2258 xw.h = 2*BORDER + term.row * xw.ch;
2259 xw.w = 2*BORDER + term.col * xw.cw;
2260 xw.fx = 0;
2261 xw.fy = 0;
2262 }
2263
2264 attrs.background_pixel = dc.xft_col[DefaultBG].pixel;
2265 attrs.border_pixel = dc.xft_col[DefaultBG].pixel;
2266 attrs.bit_gravity = NorthWestGravity;
2267 attrs.event_mask = FocusChangeMask | KeyPressMask
2268 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2269 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2270 attrs.colormap = xw.cmap;
2271
2272 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
2273 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2274 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2275 xw.vis,
2276 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2277 | CWColormap,
2278 &attrs);
2279
2280 /* double buffering */
2281 if(!XdbeQueryExtension(xw.dpy, &major, &minor))
2282 die("Xdbe extension is not present\n");
2283 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
2284
2285 /* Xft rendering context */
2286 xw.xft_draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2287
2288 /* input methods */
2289 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
2290 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2291 | XIMStatusNothing, XNClientWindow, xw.win,
2292 XNFocusWindow, xw.win, NULL);
2293 /* gc */
2294 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
2295
2296 /* white cursor, black outline */
2297 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2298 XDefineCursor(xw.dpy, xw.win, cursor);
2299 XRecolorCursor(xw.dpy, cursor,
2300 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2301 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2302
2303 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2304 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2305 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2306
2307 xresettitle();
2308 XMapWindow(xw.dpy, xw.win);
2309 xhints();
2310 XSync(xw.dpy, 0);
2311 }
2312
2313 void
2314 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2315 int winx = BORDER + x * xw.cw, winy = BORDER + y * xw.ch,
2316 width = charlen * xw.cw;
2317 Font *font = &dc.font;
2318 XGlyphInfo extents;
2319 XftColor *fg = &dc.xft_col[base.fg], *bg = &dc.xft_col[base.bg],
2320 *temp, revfg, revbg;
2321 XRenderColor colfg, colbg;
2322
2323 if(base.mode & ATTR_REVERSE)
2324 temp = fg, fg = bg, bg = temp;
2325
2326 if(base.mode & ATTR_BOLD) {
2327 if(BETWEEN(base.fg, 0, 7)) {
2328 /* basic system colors */
2329 fg = &dc.xft_col[base.fg + 8];
2330 } else if(BETWEEN(base.fg, 16, 195)) {
2331 /* 256 colors */
2332 fg = &dc.xft_col[base.fg + 36];
2333 } else if(BETWEEN(base.fg, 232, 251)) {
2334 /* greyscale */
2335 fg = &dc.xft_col[base.fg + 4];
2336 }
2337 /*
2338 * Those ranges will not be brightened:
2339 * 8 - 15 – bright system colors
2340 * 196 - 231 – highest 256 color cube
2341 * 252 - 255 – brightest colors in greyscale
2342 */
2343 font = &dc.bfont;
2344 }
2345
2346 if(base.mode & ATTR_ITALIC)
2347 font = &dc.ifont;
2348 if(base.mode & (ATTR_ITALIC|ATTR_ITALIC))
2349 font = &dc.ibfont;
2350
2351 if(IS_SET(MODE_REVERSE)) {
2352 if(fg == &dc.xft_col[DefaultFG]) {
2353 fg = &dc.xft_col[DefaultBG];
2354 } else {
2355 colfg.red = ~fg->color.red;
2356 colfg.green = ~fg->color.green;
2357 colfg.blue = ~fg->color.blue;
2358 colfg.alpha = fg->color.alpha;
2359 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2360 fg = &revfg;
2361 }
2362
2363 if(bg == &dc.xft_col[DefaultBG]) {
2364 bg = &dc.xft_col[DefaultFG];
2365 } else {
2366 colbg.red = ~bg->color.red;
2367 colbg.green = ~bg->color.green;
2368 colbg.blue = ~bg->color.blue;
2369 colbg.alpha = bg->color.alpha;
2370 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2371 bg = &revbg;
2372 }
2373 }
2374
2375 XftTextExtentsUtf8(xw.dpy, font->xft_set, (FcChar8 *)s, bytelen,
2376 &extents);
2377 width = extents.xOff;
2378
2379 /* Intelligent cleaning up of the borders. */
2380 if(x == 0) {
2381 xclear(0, (y == 0)? 0 : winy, BORDER,
2382 winy + xw.ch + (y == term.row-1)? xw.h : 0);
2383 }
2384 if(x + charlen >= term.col-1) {
2385 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2386 (y == term.row-1)? xw.h : (winy + xw.ch));
2387 }
2388 if(y == 0)
2389 xclear(winx, 0, winx + width, BORDER);
2390 if(y == term.row-1)
2391 xclear(winx, winy + xw.ch, winx + width, xw.h);
2392
2393 XftDrawRect(xw.xft_draw, bg, winx, winy, width, xw.ch);
2394 XftDrawStringUtf8(xw.xft_draw, fg, font->xft_set, winx,
2395 winy + font->ascent, (FcChar8 *)s, bytelen);
2396
2397 if(base.mode & ATTR_UNDERLINE) {
2398 XftDrawRect(xw.xft_draw, fg, winx, winy + font->ascent + 1,
2399 width, 1);
2400 }
2401 }
2402
2403 void
2404 xdrawcursor(void) {
2405 static int oldx = 0, oldy = 0;
2406 int sl;
2407 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
2408
2409 LIMIT(oldx, 0, term.col-1);
2410 LIMIT(oldy, 0, term.row-1);
2411
2412 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2413 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2414
2415 /* remove the old cursor */
2416 if(term.line[oldy][oldx].state & GLYPH_SET) {
2417 sl = utf8size(term.line[oldy][oldx].c);
2418 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2419 oldy, 1, sl);
2420 } else {
2421 xtermclear(oldx, oldy, oldx, oldy);
2422 }
2423
2424 /* draw the new one */
2425 if(!(term.c.state & CURSOR_HIDE)) {
2426 if(!(xw.state & WIN_FOCUSED))
2427 g.bg = DefaultUCS;
2428
2429 if(IS_SET(MODE_REVERSE))
2430 g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
2431
2432 sl = utf8size(g.c);
2433 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2434 oldx = term.c.x, oldy = term.c.y;
2435 }
2436 }
2437
2438 void
2439 xresettitle(void) {
2440 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
2441 }
2442
2443 void
2444 redraw(void) {
2445 struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
2446
2447 tfulldirt();
2448 draw();
2449 XSync(xw.dpy, False); /* necessary for a good tput flash */
2450 nanosleep(&tv, NULL);
2451 }
2452
2453 void
2454 draw(void) {
2455 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2456
2457 drawregion(0, 0, term.col, term.row);
2458 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2459 }
2460
2461 void
2462 drawregion(int x1, int y1, int x2, int y2) {
2463 int ic, ib, x, y, ox, sl;
2464 Glyph base, new;
2465 char buf[DRAW_BUF_SIZ];
2466 bool ena_sel = sel.bx != -1, alt = IS_SET(MODE_ALTSCREEN);
2467
2468 if((sel.alt && !alt) || (!sel.alt && alt))
2469 ena_sel = 0;
2470 if(!(xw.state & WIN_VISIBLE))
2471 return;
2472
2473 for(y = y1; y < y2; y++) {
2474 if(!term.dirty[y])
2475 continue;
2476
2477 xtermclear(0, y, term.col, y);
2478 term.dirty[y] = 0;
2479 base = term.line[y][0];
2480 ic = ib = ox = 0;
2481 for(x = x1; x < x2; x++) {
2482 new = term.line[y][x];
2483 if(ena_sel && *(new.c) && selected(x, y))
2484 new.mode ^= ATTR_REVERSE;
2485 if(ib > 0 && (!(new.state & GLYPH_SET)
2486 || ATTRCMP(base, new)
2487 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2488 xdraws(buf, base, ox, y, ic, ib);
2489 ic = ib = 0;
2490 }
2491 if(new.state & GLYPH_SET) {
2492 if(ib == 0) {
2493 ox = x;
2494 base = new;
2495 }
2496 sl = utf8size(new.c);
2497 memcpy(buf+ib, new.c, sl);
2498 ib += sl;
2499 ++ic;
2500 }
2501 }
2502 if(ib > 0)
2503 xdraws(buf, base, ox, y, ic, ib);
2504 }
2505 xdrawcursor();
2506 }
2507
2508 void
2509 expose(XEvent *ev) {
2510 XExposeEvent *e = &ev->xexpose;
2511
2512 if(xw.state & WIN_REDRAW) {
2513 if(!e->count)
2514 xw.state &= ~WIN_REDRAW;
2515 }
2516 }
2517
2518 void
2519 visibility(XEvent *ev) {
2520 XVisibilityEvent *e = &ev->xvisibility;
2521
2522 if(e->state == VisibilityFullyObscured) {
2523 xw.state &= ~WIN_VISIBLE;
2524 } else if(!(xw.state & WIN_VISIBLE)) {
2525 /* need a full redraw for next Expose, not just a buf copy */
2526 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2527 }
2528 }
2529
2530 void
2531 unmap(XEvent *ev) {
2532 xw.state &= ~WIN_VISIBLE;
2533 }
2534
2535 void
2536 xseturgency(int add) {
2537 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2538
2539 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2540 XSetWMHints(xw.dpy, xw.win, h);
2541 XFree(h);
2542 }
2543
2544 void
2545 focus(XEvent *ev) {
2546 if(ev->type == FocusIn) {
2547 xw.state |= WIN_FOCUSED;
2548 xseturgency(0);
2549 } else {
2550 xw.state &= ~WIN_FOCUSED;
2551 }
2552 }
2553
2554 char*
2555 kmap(KeySym k, uint state) {
2556 int i;
2557 uint mask;
2558
2559 state &= ~Mod2Mask;
2560 for(i = 0; i < LEN(key); i++) {
2561 mask = key[i].mask;
2562
2563 if(key[i].k == k && ((state & mask) == mask
2564 || (mask == XK_NO_MOD && !state))) {
2565 return (char*)key[i].s;
2566 }
2567 }
2568 return NULL;
2569 }
2570
2571 void
2572 kpress(XEvent *ev) {
2573 XKeyEvent *e = &ev->xkey;
2574 KeySym ksym;
2575 char buf[32];
2576 char *customkey;
2577 int len;
2578 int meta;
2579 int shift;
2580 Status status;
2581
2582 if (IS_SET(MODE_KBDLOCK))
2583 return;
2584
2585 meta = e->state & Mod1Mask;
2586 shift = e->state & ShiftMask;
2587 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
2588
2589 /* 1. custom keys from config.h */
2590 if((customkey = kmap(ksym, e->state))) {
2591 ttywrite(customkey, strlen(customkey));
2592 /* 2. hardcoded (overrides X lookup) */
2593 } else {
2594 switch(ksym) {
2595 case XK_Up:
2596 case XK_Down:
2597 case XK_Left:
2598 case XK_Right:
2599 /* XXX: shift up/down doesn't work */
2600 sprintf(buf, "\033%c%c",
2601 IS_SET(MODE_APPKEYPAD) ? 'O' : '[',
2602 (shift ? "dacb":"DACB")[ksym - XK_Left]);
2603 ttywrite(buf, 3);
2604 break;
2605 case XK_Insert:
2606 if(shift)
2607 selpaste();
2608 break;
2609 case XK_Return:
2610 if(IS_SET(MODE_CRLF)) {
2611 ttywrite("\r\n", 2);
2612 } else {
2613 ttywrite("\r", 1);
2614 }
2615 break;
2616 /* 3. X lookup */
2617 default:
2618 if(len > 0) {
2619 if(meta && len == 1)
2620 ttywrite("\033", 1);
2621 ttywrite(buf, len);
2622 }
2623 break;
2624 }
2625 }
2626 }
2627
2628 void
2629 cmessage(XEvent *e) {
2630 /* See xembed specs
2631 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2632 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2633 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2634 xw.state |= WIN_FOCUSED;
2635 xseturgency(0);
2636 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2637 xw.state &= ~WIN_FOCUSED;
2638 }
2639 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
2640 /* Send SIGHUP to shell */
2641 kill(pid, SIGHUP);
2642 exit(EXIT_SUCCESS);
2643 }
2644 }
2645
2646 void
2647 resize(XEvent *e) {
2648 int col, row;
2649
2650 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2651 return;
2652
2653 xw.w = e->xconfigure.width;
2654 xw.h = e->xconfigure.height;
2655 col = (xw.w - 2*BORDER) / xw.cw;
2656 row = (xw.h - 2*BORDER) / xw.ch;
2657 if(col == term.col && row == term.row)
2658 return;
2659
2660 tresize(col, row);
2661 xresize(col, row);
2662 ttyresize();
2663 }
2664
2665 void
2666 run(void) {
2667 XEvent ev;
2668 fd_set rfd;
2669 int xfd = XConnectionNumber(xw.dpy), i;
2670 struct timeval drawtimeout, *tv = NULL;
2671
2672 for(i = 0;; i++) {
2673 FD_ZERO(&rfd);
2674 FD_SET(cmdfd, &rfd);
2675 FD_SET(xfd, &rfd);
2676 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
2677 if(errno == EINTR)
2678 continue;
2679 die("select failed: %s\n", SERRNO);
2680 }
2681
2682 /*
2683 * Stop after a certain number of reads so the user does not
2684 * feel like the system is stuttering.
2685 */
2686 if(i < 1000 && FD_ISSET(cmdfd, &rfd)) {
2687 ttyread();
2688
2689 /*
2690 * Just wait a bit so it isn't disturbing the
2691 * user and the system is able to write something.
2692 */
2693 drawtimeout.tv_sec = 0;
2694 drawtimeout.tv_usec = 5;
2695 tv = &drawtimeout;
2696 continue;
2697 }
2698 i = 0;
2699 tv = NULL;
2700
2701 while(XPending(xw.dpy)) {
2702 XNextEvent(xw.dpy, &ev);
2703 if(XFilterEvent(&ev, xw.win))
2704 continue;
2705 if(handler[ev.type])
2706 (handler[ev.type])(&ev);
2707 }
2708
2709 draw();
2710 XFlush(xw.dpy);
2711 }
2712 }
2713
2714 int
2715 main(int argc, char *argv[]) {
2716 int i, bitm, xr, yr;
2717 uint wr, hr;
2718
2719 xw.fw = xw.fh = xw.fx = xw.fy = 0;
2720 xw.isfixed = False;
2721
2722 for(i = 1; i < argc; i++) {
2723 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2724 case 'c':
2725 if(++i < argc)
2726 opt_class = argv[i];
2727 break;
2728 case 'e':
2729 /* eat every remaining arguments */
2730 if(++i < argc)
2731 opt_cmd = &argv[i];
2732 goto run;
2733 case 'f':
2734 if(++i < argc)
2735 opt_font = argv[i];
2736 break;
2737 case 'g':
2738 if(++i >= argc)
2739 break;
2740
2741 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
2742 if(bitm & XValue)
2743 xw.fx = xr;
2744 if(bitm & YValue)
2745 xw.fy = yr;
2746 if(bitm & WidthValue)
2747 xw.fw = (int)wr;
2748 if(bitm & HeightValue)
2749 xw.fh = (int)hr;
2750 if(bitm & XNegative && xw.fx == 0)
2751 xw.fx = -1;
2752 if(bitm & XNegative && xw.fy == 0)
2753 xw.fy = -1;
2754
2755 if(xw.fh != 0 && xw.fw != 0)
2756 xw.isfixed = True;
2757 break;
2758 case 'o':
2759 if(++i < argc)
2760 opt_io = argv[i];
2761 break;
2762 case 't':
2763 if(++i < argc)
2764 opt_title = argv[i];
2765 break;
2766 case 'v':
2767 default:
2768 die(USAGE);
2769 case 'w':
2770 if(++i < argc)
2771 opt_embed = argv[i];
2772 break;
2773 }
2774 }
2775
2776 run:
2777 setlocale(LC_CTYPE, "");
2778 tnew(80, 24);
2779 ttynew();
2780 xinit();
2781 selinit();
2782 run();
2783 return 0;
2784 }
2785