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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 ssize_t xwrite(int, char *, size_t);
344 static void *xmalloc(size_t);
345 static void *xrealloc(void *, size_t);
346 static void *xcalloc(size_t nmemb, size_t size);
347 static char *smstrcat(char *, ...);
348
349 static void (*handler[LASTEvent])(XEvent *) = {
350 [KeyPress] = kpress,
351 [ClientMessage] = cmessage,
352 [ConfigureNotify] = resize,
353 [VisibilityNotify] = visibility,
354 [UnmapNotify] = unmap,
355 [Expose] = expose,
356 [FocusIn] = focus,
357 [FocusOut] = focus,
358 [MotionNotify] = bmotion,
359 [ButtonPress] = bpress,
360 [ButtonRelease] = brelease,
361 [SelectionClear] = selclear,
362 [SelectionNotify] = selnotify,
363 [SelectionRequest] = selrequest,
364 };
365
366 /* Globals */
367 static DC dc;
368 static XWindow xw;
369 static Term term;
370 static CSIEscape csiescseq;
371 static STREscape strescseq;
372 static int cmdfd;
373 static pid_t pid;
374 static Selection sel;
375 static int iofd = -1;
376 static char **opt_cmd = NULL;
377 static char *opt_io = NULL;
378 static char *opt_title = NULL;
379 static char *opt_embed = NULL;
380 static char *opt_class = NULL;
381 static char *opt_font = NULL;
382
383
384 ssize_t
385 xwrite(int fd, char *s, size_t len) {
386 size_t aux = len;
387
388 while(len > 0) {
389 ssize_t r = write(fd, s, len);
390 if(r < 0)
391 return r;
392 len -= r;
393 s += r;
394 }
395 return aux;
396 }
397
398 void *
399 xmalloc(size_t len) {
400 void *p = malloc(len);
401
402 if(!p)
403 die("Out of memory\n");
404
405 return p;
406 }
407
408 void *
409 xrealloc(void *p, size_t len) {
410 if((p = realloc(p, len)) == NULL)
411 die("Out of memory\n");
412
413 return p;
414 }
415
416 void *
417 xcalloc(size_t nmemb, size_t size) {
418 void *p = calloc(nmemb, size);
419
420 if(!p)
421 die("Out of memory\n");
422
423 return p;
424 }
425
426 char *
427 smstrcat(char *src, ...)
428 {
429 va_list fmtargs;
430 char *ret, *p, *v;
431 int len, slen, flen;
432
433 len = slen = strlen(src);
434
435 va_start(fmtargs, src);
436 for(;;) {
437 v = va_arg(fmtargs, char *);
438 if(v == NULL)
439 break;
440 len += strlen(v);
441 }
442 va_end(fmtargs);
443
444 p = ret = xmalloc(len+1);
445 memmove(p, src, slen);
446 p += slen;
447
448 va_start(fmtargs, src);
449 for(;;) {
450 v = va_arg(fmtargs, char *);
451 if(v == NULL)
452 break;
453 flen = strlen(v);
454 memmove(p, v, flen);
455 p += flen;
456 }
457 va_end(fmtargs);
458
459 ret[len] = '\0';
460
461 return ret;
462 }
463
464 int
465 utf8decode(char *s, long *u) {
466 uchar c;
467 int i, n, rtn;
468
469 rtn = 1;
470 c = *s;
471 if(~c & B7) { /* 0xxxxxxx */
472 *u = c;
473 return rtn;
474 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
475 *u = c&(B4|B3|B2|B1|B0);
476 n = 1;
477 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
478 *u = c&(B3|B2|B1|B0);
479 n = 2;
480 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
481 *u = c & (B2|B1|B0);
482 n = 3;
483 } else {
484 goto invalid;
485 }
486
487 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
488 c = *s;
489 if((c & (B7|B6)) != B7) /* 10xxxxxx */
490 goto invalid;
491 *u <<= 6;
492 *u |= c & (B5|B4|B3|B2|B1|B0);
493 }
494
495 if((n == 1 && *u < 0x80) ||
496 (n == 2 && *u < 0x800) ||
497 (n == 3 && *u < 0x10000) ||
498 (*u >= 0xD800 && *u <= 0xDFFF)) {
499 goto invalid;
500 }
501
502 return rtn;
503 invalid:
504 *u = 0xFFFD;
505
506 return rtn;
507 }
508
509 int
510 utf8encode(long *u, char *s) {
511 uchar *sp;
512 ulong uc;
513 int i, n;
514
515 sp = (uchar *)s;
516 uc = *u;
517 if(uc < 0x80) {
518 *sp = uc; /* 0xxxxxxx */
519 return 1;
520 } else if(*u < 0x800) {
521 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
522 n = 1;
523 } else if(uc < 0x10000) {
524 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
525 n = 2;
526 } else if(uc <= 0x10FFFF) {
527 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
528 n = 3;
529 } else {
530 goto invalid;
531 }
532
533 for(i=n,++sp; i>0; --i,++sp)
534 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
535
536 return n+1;
537 invalid:
538 /* U+FFFD */
539 *s++ = '\xEF';
540 *s++ = '\xBF';
541 *s = '\xBD';
542
543 return 3;
544 }
545
546 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
547 UTF-8 otherwise return 0 */
548 int
549 isfullutf8(char *s, int b) {
550 uchar *c1, *c2, *c3;
551
552 c1 = (uchar *)s;
553 c2 = (uchar *)++s;
554 c3 = (uchar *)++s;
555 if(b < 1) {
556 return 0;
557 } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
558 return 0;
559 } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
560 ((b == 1) ||
561 ((b == 2) && (*c2&(B7|B6)) == B7))) {
562 return 0;
563 } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
564 ((b == 1) ||
565 ((b == 2) && (*c2&(B7|B6)) == B7) ||
566 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
567 return 0;
568 } else {
569 return 1;
570 }
571 }
572
573 int
574 utf8size(char *s) {
575 uchar c = *s;
576
577 if(~c&B7) {
578 return 1;
579 } else if((c&(B7|B6|B5)) == (B7|B6)) {
580 return 2;
581 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
582 return 3;
583 } else {
584 return 4;
585 }
586 }
587
588 void
589 selinit(void) {
590 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
591 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
592 sel.mode = 0;
593 sel.bx = -1;
594 sel.clip = NULL;
595 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
596 if(sel.xtarget == None)
597 sel.xtarget = XA_STRING;
598 }
599
600 static inline bool
601 selected(int x, int y) {
602 int bx, ex;
603
604 if(sel.ey == y && sel.by == y) {
605 bx = MIN(sel.bx, sel.ex);
606 ex = MAX(sel.bx, sel.ex);
607 return BETWEEN(x, bx, ex);
608 }
609
610 return ((sel.b.y < y && y < sel.e.y)
611 || (y == sel.e.y && x <= sel.e.x))
612 || (y == sel.b.y && x >= sel.b.x
613 && (x <= sel.e.x || sel.b.y != sel.e.y));
614 }
615
616 void
617 getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
618 if(b)
619 *b = e->xbutton.button;
620
621 *x = X2COL(e->xbutton.x);
622 *y = Y2ROW(e->xbutton.y);
623 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
624 sel.b.y = MIN(sel.by, sel.ey);
625 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
626 sel.e.y = MAX(sel.by, sel.ey);
627 }
628
629 void
630 mousereport(XEvent *e) {
631 int x = X2COL(e->xbutton.x);
632 int y = Y2ROW(e->xbutton.y);
633 int button = e->xbutton.button;
634 int state = e->xbutton.state;
635 char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
636 static int ob, ox, oy;
637
638 /* from urxvt */
639 if(e->xbutton.type == MotionNotify) {
640 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
641 return;
642 button = ob + 32;
643 ox = x, oy = y;
644 } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
645 button = 3;
646 } else {
647 button -= Button1;
648 if(button >= 3)
649 button += 64 - 3;
650 if(e->xbutton.type == ButtonPress) {
651 ob = button;
652 ox = x, oy = y;
653 }
654 }
655
656 buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
657 + (state & Mod4Mask ? 8 : 0)
658 + (state & ControlMask ? 16 : 0);
659
660 ttywrite(buf, sizeof(buf));
661 }
662
663 void
664 bpress(XEvent *e) {
665 if(IS_SET(MODE_MOUSE)) {
666 mousereport(e);
667 } else if(e->xbutton.button == Button1) {
668 if(sel.bx != -1) {
669 sel.bx = -1;
670 tsetdirt(sel.b.y, sel.e.y);
671 draw();
672 }
673 sel.mode = 1;
674 sel.ex = sel.bx = X2COL(e->xbutton.x);
675 sel.ey = sel.by = Y2ROW(e->xbutton.y);
676 }
677 }
678
679 void
680 selcopy(void) {
681 char *str, *ptr, *p;
682 int x, y, bufsize, is_selected = 0, size;
683 Glyph *gp;
684
685 if(sel.bx == -1) {
686 str = NULL;
687 } else {
688 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
689 ptr = str = xmalloc(bufsize);
690
691 /* append every set & selected glyph to the selection */
692 for(y = 0; y < term.row; y++) {
693 for(x = 0; x < term.col; x++) {
694 gp = &term.line[y][x];
695
696 if(!(is_selected = selected(x, y)))
697 continue;
698 p = (gp->state & GLYPH_SET) ? gp->c : " ";
699 size = utf8size(p);
700 memcpy(ptr, p, size);
701 ptr += size;
702 }
703 /* \n at the end of every selected line except for the last one */
704 if(is_selected && y < sel.e.y)
705 *ptr++ = '\n';
706 }
707 *ptr = 0;
708 }
709 sel.alt = IS_SET(MODE_ALTSCREEN);
710 xsetsel(str);
711 }
712
713 void
714 selnotify(XEvent *e) {
715 ulong nitems, ofs, rem;
716 int format;
717 uchar *data;
718 Atom type;
719
720 ofs = 0;
721 do {
722 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
723 False, AnyPropertyType, &type, &format,
724 &nitems, &rem, &data)) {
725 fprintf(stderr, "Clipboard allocation failed\n");
726 return;
727 }
728 ttywrite((const char *) data, nitems * format / 8);
729 XFree(data);
730 /* number of 32-bit chunks returned */
731 ofs += nitems * format / 32;
732 } while(rem > 0);
733 }
734
735 void
736 selpaste(void) {
737 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
738 xw.win, CurrentTime);
739 }
740
741 void selclear(XEvent *e) {
742 if(sel.bx == -1)
743 return;
744 sel.bx = -1;
745 tsetdirt(sel.b.y, sel.e.y);
746 }
747
748 void
749 selrequest(XEvent *e) {
750 XSelectionRequestEvent *xsre;
751 XSelectionEvent xev;
752 Atom xa_targets, string;
753
754 xsre = (XSelectionRequestEvent *) e;
755 xev.type = SelectionNotify;
756 xev.requestor = xsre->requestor;
757 xev.selection = xsre->selection;
758 xev.target = xsre->target;
759 xev.time = xsre->time;
760 /* reject */
761 xev.property = None;
762
763 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
764 if(xsre->target == xa_targets) {
765 /* respond with the supported type */
766 string = sel.xtarget;
767 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
768 XA_ATOM, 32, PropModeReplace,
769 (uchar *) &string, 1);
770 xev.property = xsre->property;
771 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
772 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
773 xsre->target, 8, PropModeReplace,
774 (uchar *) sel.clip, strlen(sel.clip));
775 xev.property = xsre->property;
776 }
777
778 /* all done, send a notification to the listener */
779 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
780 fprintf(stderr, "Error sending SelectionNotify event\n");
781 }
782
783 void
784 xsetsel(char *str) {
785 /* register the selection for both the clipboard and the primary */
786 Atom clipboard;
787
788 free(sel.clip);
789 sel.clip = str;
790
791 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
792
793 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
794 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
795 }
796
797 void
798 brelease(XEvent *e) {
799 struct timeval now;
800
801 if(IS_SET(MODE_MOUSE)) {
802 mousereport(e);
803 return;
804 }
805
806 if(e->xbutton.button == Button2) {
807 selpaste();
808 } else if(e->xbutton.button == Button1) {
809 sel.mode = 0;
810 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
811 term.dirty[sel.ey] = 1;
812 if(sel.bx == sel.ex && sel.by == sel.ey) {
813 sel.bx = -1;
814 gettimeofday(&now, NULL);
815
816 if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
817 /* triple click on the line */
818 sel.b.x = sel.bx = 0;
819 sel.e.x = sel.ex = term.col;
820 sel.b.y = sel.e.y = sel.ey;
821 selcopy();
822 } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
823 /* double click to select word */
824 sel.bx = sel.ex;
825 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
826 term.line[sel.ey][sel.bx-1].c[0] != ' ') {
827 sel.bx--;
828 }
829 sel.b.x = sel.bx;
830 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
831 term.line[sel.ey][sel.ex+1].c[0] != ' ') {
832 sel.ex++;
833 }
834 sel.e.x = sel.ex;
835 sel.b.y = sel.e.y = sel.ey;
836 selcopy();
837 }
838 } else {
839 selcopy();
840 }
841 }
842
843 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
844 gettimeofday(&sel.tclick1, NULL);
845 }
846
847 void
848 bmotion(XEvent *e) {
849 int starty, endy, oldey, oldex;
850
851 if(IS_SET(MODE_MOUSE)) {
852 mousereport(e);
853 return;
854 }
855
856 if(sel.mode) {
857 oldey = sel.ey;
858 oldex = sel.ex;
859 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
860
861 if(oldey != sel.ey || oldex != sel.ex) {
862 starty = MIN(oldey, sel.ey);
863 endy = MAX(oldey, sel.ey);
864 tsetdirt(starty, endy);
865 }
866 }
867 }
868
869 void
870 die(const char *errstr, ...) {
871 va_list ap;
872
873 va_start(ap, errstr);
874 vfprintf(stderr, errstr, ap);
875 va_end(ap);
876 exit(EXIT_FAILURE);
877 }
878
879 void
880 execsh(void) {
881 char **args;
882 char *envshell = getenv("SHELL");
883
884 unsetenv("COLUMNS");
885 unsetenv("LINES");
886 unsetenv("TERMCAP");
887
888 signal(SIGCHLD, SIG_DFL);
889 signal(SIGHUP, SIG_DFL);
890 signal(SIGINT, SIG_DFL);
891 signal(SIGQUIT, SIG_DFL);
892 signal(SIGTERM, SIG_DFL);
893 signal(SIGALRM, SIG_DFL);
894
895 DEFAULT(envshell, SHELL);
896 putenv("TERM="TNAME);
897 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
898 execvp(args[0], args);
899 exit(EXIT_FAILURE);
900 }
901
902 void
903 sigchld(int a) {
904 int stat = 0;
905
906 if(waitpid(pid, &stat, 0) < 0)
907 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
908
909 if(WIFEXITED(stat)) {
910 exit(WEXITSTATUS(stat));
911 } else {
912 exit(EXIT_FAILURE);
913 }
914 }
915
916 void
917 ttynew(void) {
918 int m, s;
919 struct winsize w = {term.row, term.col, 0, 0};
920
921 /* seems to work fine on linux, openbsd and freebsd */
922 if(openpty(&m, &s, NULL, NULL, &w) < 0)
923 die("openpty failed: %s\n", SERRNO);
924
925 switch(pid = fork()) {
926 case -1:
927 die("fork failed\n");
928 break;
929 case 0:
930 setsid(); /* create a new process group */
931 dup2(s, STDIN_FILENO);
932 dup2(s, STDOUT_FILENO);
933 dup2(s, STDERR_FILENO);
934 if(ioctl(s, TIOCSCTTY, NULL) < 0)
935 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
936 close(s);
937 close(m);
938 execsh();
939 break;
940 default:
941 close(s);
942 cmdfd = m;
943 signal(SIGCHLD, sigchld);
944 if(opt_io) {
945 iofd = (!strcmp(opt_io, "-")) ?
946 STDOUT_FILENO :
947 open(opt_io, O_WRONLY | O_CREAT, 0666);
948 if(iofd < 0) {
949 fprintf(stderr, "Error opening %s:%s\n",
950 opt_io, strerror(errno));
951 }
952 }
953 }
954 }
955
956 void
957 dump(char c) {
958 static int col;
959
960 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
961 if(++col % 10 == 0)
962 fprintf(stderr, "\n");
963 }
964
965 void
966 ttyread(void) {
967 static char buf[BUFSIZ];
968 static int buflen = 0;
969 char *ptr;
970 char s[UTF_SIZ];
971 int charsize; /* size of utf8 char in bytes */
972 long utf8c;
973 int ret;
974
975 /* append read bytes to unprocessed bytes */
976 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
977 die("Couldn't read from shell: %s\n", SERRNO);
978
979 /* process every complete utf8 char */
980 buflen += ret;
981 ptr = buf;
982 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
983 charsize = utf8decode(ptr, &utf8c);
984 utf8encode(&utf8c, s);
985 tputc(s, charsize);
986 ptr += charsize;
987 buflen -= charsize;
988 }
989
990 /* keep any uncomplete utf8 char for the next call */
991 memmove(buf, ptr, buflen);
992 }
993
994 void
995 ttywrite(const char *s, size_t n) {
996 if(write(cmdfd, s, n) == -1)
997 die("write error on tty: %s\n", SERRNO);
998 }
999
1000 void
1001 ttyresize(void) {
1002 struct winsize w;
1003
1004 w.ws_row = term.row;
1005 w.ws_col = term.col;
1006 w.ws_xpixel = xw.tw;
1007 w.ws_ypixel = xw.th;
1008 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1009 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1010 }
1011
1012 void
1013 tsetdirt(int top, int bot) {
1014 int i;
1015
1016 LIMIT(top, 0, term.row-1);
1017 LIMIT(bot, 0, term.row-1);
1018
1019 for(i = top; i <= bot; i++)
1020 term.dirty[i] = 1;
1021 }
1022
1023 void
1024 tfulldirt(void) {
1025 tsetdirt(0, term.row-1);
1026 }
1027
1028 void
1029 tcursor(int mode) {
1030 static TCursor c;
1031
1032 if(mode == CURSOR_SAVE) {
1033 c = term.c;
1034 } else if(mode == CURSOR_LOAD) {
1035 term.c = c;
1036 tmoveto(c.x, c.y);
1037 }
1038 }
1039
1040 void
1041 treset(void) {
1042 uint i;
1043
1044 term.c = (TCursor){{
1045 .mode = ATTR_NULL,
1046 .fg = DefaultFG,
1047 .bg = DefaultBG
1048 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1049
1050 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1051 for(i = TAB; i < term.col; i += TAB)
1052 term.tabs[i] = 1;
1053 term.top = 0;
1054 term.bot = term.row - 1;
1055 term.mode = MODE_WRAP;
1056
1057 tclearregion(0, 0, term.col-1, term.row-1);
1058 }
1059
1060 void
1061 tnew(int col, int row) {
1062 /* set screen size */
1063 term.row = row;
1064 term.col = col;
1065 term.line = xmalloc(term.row * sizeof(Line));
1066 term.alt = xmalloc(term.row * sizeof(Line));
1067 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
1068 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
1069
1070 for(row = 0; row < term.row; row++) {
1071 term.line[row] = xmalloc(term.col * sizeof(Glyph));
1072 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
1073 term.dirty[row] = 0;
1074 }
1075 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1076 /* setup screen */
1077 treset();
1078 }
1079
1080 void
1081 tswapscreen(void) {
1082 Line *tmp = term.line;
1083
1084 term.line = term.alt;
1085 term.alt = tmp;
1086 term.mode ^= MODE_ALTSCREEN;
1087 tfulldirt();
1088 }
1089
1090 void
1091 tscrolldown(int orig, int n) {
1092 int i;
1093 Line temp;
1094
1095 LIMIT(n, 0, term.bot-orig+1);
1096
1097 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1098
1099 for(i = term.bot; i >= orig+n; i--) {
1100 temp = term.line[i];
1101 term.line[i] = term.line[i-n];
1102 term.line[i-n] = temp;
1103
1104 term.dirty[i] = 1;
1105 term.dirty[i-n] = 1;
1106 }
1107
1108 selscroll(orig, n);
1109 }
1110
1111 void
1112 tscrollup(int orig, int n) {
1113 int i;
1114 Line temp;
1115 LIMIT(n, 0, term.bot-orig+1);
1116
1117 tclearregion(0, orig, term.col-1, orig+n-1);
1118
1119 for(i = orig; i <= term.bot-n; i++) {
1120 temp = term.line[i];
1121 term.line[i] = term.line[i+n];
1122 term.line[i+n] = temp;
1123
1124 term.dirty[i] = 1;
1125 term.dirty[i+n] = 1;
1126 }
1127
1128 selscroll(orig, -n);
1129 }
1130
1131 void
1132 selscroll(int orig, int n) {
1133 if(sel.bx == -1)
1134 return;
1135
1136 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1137 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1138 sel.bx = -1;
1139 return;
1140 }
1141 if(sel.by < term.top) {
1142 sel.by = term.top;
1143 sel.bx = 0;
1144 }
1145 if(sel.ey > term.bot) {
1146 sel.ey = term.bot;
1147 sel.ex = term.col;
1148 }
1149 sel.b.y = sel.by, sel.b.x = sel.bx;
1150 sel.e.y = sel.ey, sel.e.x = sel.ex;
1151 }
1152 }
1153
1154 void
1155 tnewline(int first_col) {
1156 int y = term.c.y;
1157
1158 if(y == term.bot) {
1159 tscrollup(term.top, 1);
1160 } else {
1161 y++;
1162 }
1163 tmoveto(first_col ? 0 : term.c.x, y);
1164 }
1165
1166 void
1167 csiparse(void) {
1168 /* int noarg = 1; */
1169 char *p = csiescseq.buf;
1170
1171 csiescseq.narg = 0;
1172 if(*p == '?')
1173 csiescseq.priv = 1, p++;
1174
1175 while(p < csiescseq.buf+csiescseq.len) {
1176 while(isdigit(*p)) {
1177 csiescseq.arg[csiescseq.narg] *= 10;
1178 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1179 }
1180 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ) {
1181 csiescseq.narg++, p++;
1182 } else {
1183 csiescseq.mode = *p;
1184 csiescseq.narg++;
1185
1186 return;
1187 }
1188 }
1189 }
1190
1191 void
1192 tmoveto(int x, int y) {
1193 LIMIT(x, 0, term.col-1);
1194 LIMIT(y, 0, term.row-1);
1195 term.c.state &= ~CURSOR_WRAPNEXT;
1196 term.c.x = x;
1197 term.c.y = y;
1198 }
1199
1200 void
1201 tsetchar(char *c, Glyph *attr, int x, int y) {
1202 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1203 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1204 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1205 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1206 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1207 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1208 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1209 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1210 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1211 };
1212
1213 /*
1214 * The table is proudly stolen from rxvt.
1215 */
1216 if(attr->mode & ATTR_GFX) {
1217 if(c[0] >= 0x41 && c[0] <= 0x7e
1218 && vt100_0[c[0] - 0x41]) {
1219 c = vt100_0[c[0] - 0x41];
1220 }
1221 }
1222
1223 term.dirty[y] = 1;
1224 term.line[y][x] = *attr;
1225 memcpy(term.line[y][x].c, c, UTF_SIZ);
1226 term.line[y][x].state |= GLYPH_SET;
1227 }
1228
1229 void
1230 tclearregion(int x1, int y1, int x2, int y2) {
1231 int x, y, temp;
1232
1233 if(x1 > x2)
1234 temp = x1, x1 = x2, x2 = temp;
1235 if(y1 > y2)
1236 temp = y1, y1 = y2, y2 = temp;
1237
1238 LIMIT(x1, 0, term.col-1);
1239 LIMIT(x2, 0, term.col-1);
1240 LIMIT(y1, 0, term.row-1);
1241 LIMIT(y2, 0, term.row-1);
1242
1243 for(y = y1; y <= y2; y++) {
1244 term.dirty[y] = 1;
1245 for(x = x1; x <= x2; x++)
1246 term.line[y][x].state = 0;
1247 }
1248 }
1249
1250 void
1251 tdeletechar(int n) {
1252 int src = term.c.x + n;
1253 int dst = term.c.x;
1254 int size = term.col - src;
1255
1256 term.dirty[term.c.y] = 1;
1257
1258 if(src >= term.col) {
1259 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1260 return;
1261 }
1262
1263 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1264 size * sizeof(Glyph));
1265 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1266 }
1267
1268 void
1269 tinsertblank(int n) {
1270 int src = term.c.x;
1271 int dst = src + n;
1272 int size = term.col - dst;
1273
1274 term.dirty[term.c.y] = 1;
1275
1276 if(dst >= term.col) {
1277 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1278 return;
1279 }
1280
1281 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1282 size * sizeof(Glyph));
1283 tclearregion(src, term.c.y, dst - 1, term.c.y);
1284 }
1285
1286 void
1287 tinsertblankline(int n) {
1288 if(term.c.y < term.top || term.c.y > term.bot)
1289 return;
1290
1291 tscrolldown(term.c.y, n);
1292 }
1293
1294 void
1295 tdeleteline(int n) {
1296 if(term.c.y < term.top || term.c.y > term.bot)
1297 return;
1298
1299 tscrollup(term.c.y, n);
1300 }
1301
1302 void
1303 tsetattr(int *attr, int l) {
1304 int i;
1305
1306 for(i = 0; i < l; i++) {
1307 switch(attr[i]) {
1308 case 0:
1309 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1310 | ATTR_ITALIC | ATTR_BLINK);
1311 term.c.attr.fg = DefaultFG;
1312 term.c.attr.bg = DefaultBG;
1313 break;
1314 case 1:
1315 term.c.attr.mode |= ATTR_BOLD;
1316 break;
1317 case 3: /* enter standout (highlight) */
1318 term.c.attr.mode |= ATTR_ITALIC;
1319 break;
1320 case 4:
1321 term.c.attr.mode |= ATTR_UNDERLINE;
1322 break;
1323 case 5:
1324 term.c.attr.mode |= ATTR_BLINK;
1325 break;
1326 case 7:
1327 term.c.attr.mode |= ATTR_REVERSE;
1328 break;
1329 case 21:
1330 case 22:
1331 term.c.attr.mode &= ~ATTR_BOLD;
1332 break;
1333 case 23: /* leave standout (highlight) mode */
1334 term.c.attr.mode &= ~ATTR_ITALIC;
1335 break;
1336 case 24:
1337 term.c.attr.mode &= ~ATTR_UNDERLINE;
1338 break;
1339 case 25:
1340 term.c.attr.mode &= ~ATTR_BLINK;
1341 break;
1342 case 27:
1343 term.c.attr.mode &= ~ATTR_REVERSE;
1344 break;
1345 case 38:
1346 if(i + 2 < l && attr[i + 1] == 5) {
1347 i += 2;
1348 if(BETWEEN(attr[i], 0, 255)) {
1349 term.c.attr.fg = attr[i];
1350 } else {
1351 fprintf(stderr,
1352 "erresc: bad fgcolor %d\n",
1353 attr[i]);
1354 }
1355 } else {
1356 fprintf(stderr,
1357 "erresc(38): gfx attr %d unknown\n",
1358 attr[i]);
1359 }
1360 break;
1361 case 39:
1362 term.c.attr.fg = DefaultFG;
1363 break;
1364 case 48:
1365 if(i + 2 < l && attr[i + 1] == 5) {
1366 i += 2;
1367 if(BETWEEN(attr[i], 0, 255)) {
1368 term.c.attr.bg = attr[i];
1369 } else {
1370 fprintf(stderr,
1371 "erresc: bad bgcolor %d\n",
1372 attr[i]);
1373 }
1374 } else {
1375 fprintf(stderr,
1376 "erresc(48): gfx attr %d unknown\n",
1377 attr[i]);
1378 }
1379 break;
1380 case 49:
1381 term.c.attr.bg = DefaultBG;
1382 break;
1383 default:
1384 if(BETWEEN(attr[i], 30, 37)) {
1385 term.c.attr.fg = attr[i] - 30;
1386 } else if(BETWEEN(attr[i], 40, 47)) {
1387 term.c.attr.bg = attr[i] - 40;
1388 } else if(BETWEEN(attr[i], 90, 97)) {
1389 term.c.attr.fg = attr[i] - 90 + 8;
1390 } else if(BETWEEN(attr[i], 100, 107)) {
1391 term.c.attr.bg = attr[i] - 100 + 8;
1392 } else {
1393 fprintf(stderr,
1394 "erresc(default): gfx attr %d unknown\n",
1395 attr[i]), csidump();
1396 }
1397 break;
1398 }
1399 }
1400 }
1401
1402 void
1403 tsetscroll(int t, int b) {
1404 int temp;
1405
1406 LIMIT(t, 0, term.row-1);
1407 LIMIT(b, 0, term.row-1);
1408 if(t > b) {
1409 temp = t;
1410 t = b;
1411 b = temp;
1412 }
1413 term.top = t;
1414 term.bot = b;
1415 }
1416
1417 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1418
1419 void
1420 tsetmode(bool priv, bool set, int *args, int narg) {
1421 int *lim, mode;
1422
1423 for(lim = args + narg; args < lim; ++args) {
1424 if(priv) {
1425 switch(*args) {
1426 break;
1427 case 1: /* DECCKM -- Cursor key */
1428 MODBIT(term.mode, set, MODE_APPKEYPAD);
1429 break;
1430 case 5: /* DECSCNM -- Reverse video */
1431 mode = term.mode;
1432 MODBIT(term.mode, set, MODE_REVERSE);
1433 if(mode != term.mode)
1434 redraw();
1435 break;
1436 case 6: /* XXX: DECOM -- Origin */
1437 break;
1438 case 7: /* DECAWM -- Auto wrap */
1439 MODBIT(term.mode, set, MODE_WRAP);
1440 break;
1441 case 8: /* XXX: DECARM -- Auto repeat */
1442 break;
1443 case 0: /* Error (IGNORED) */
1444 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1445 break;
1446 case 25:
1447 MODBIT(term.c.state, !set, CURSOR_HIDE);
1448 break;
1449 case 1000: /* 1000,1002: enable xterm mouse report */
1450 MODBIT(term.mode, set, MODE_MOUSEBTN);
1451 break;
1452 case 1002:
1453 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1454 break;
1455 case 1049: /* = 1047 and 1048 */
1456 case 47:
1457 case 1047:
1458 if(IS_SET(MODE_ALTSCREEN))
1459 tclearregion(0, 0, term.col-1, term.row-1);
1460 if((set && !IS_SET(MODE_ALTSCREEN)) ||
1461 (!set && IS_SET(MODE_ALTSCREEN))) {
1462 tswapscreen();
1463 }
1464 if(*args != 1049)
1465 break;
1466 /* pass through */
1467 case 1048:
1468 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1469 break;
1470 default:
1471 /* case 2: DECANM -- ANSI/VT52 (NOT SUPPOURTED) */
1472 /* case 3: DECCOLM -- Column (NOT SUPPORTED) */
1473 /* case 4: DECSCLM -- Scroll (NOT SUPPORTED) */
1474 /* case 18: DECPFF -- Printer feed (NOT SUPPORTED) */
1475 /* case 19: DECPEX -- Printer extent (NOT SUPPORTED) */
1476 /* case 42: DECNRCM -- National characters (NOT SUPPORTED) */
1477 fprintf(stderr,
1478 "erresc: unknown private set/reset mode %d\n",
1479 *args);
1480 break;
1481 }
1482 } else {
1483 switch(*args) {
1484 case 0: /* Error (IGNORED) */
1485 break;
1486 case 2: /* KAM -- keyboard action */
1487 MODBIT(term.mode, set, MODE_KBDLOCK);
1488 break;
1489 case 4: /* IRM -- Insertion-replacement */
1490 MODBIT(term.mode, set, MODE_INSERT);
1491 break;
1492 case 12: /* XXX: SRM -- Send/Receive */
1493 break;
1494 case 20: /* LNM -- Linefeed/new line */
1495 MODBIT(term.mode, set, MODE_CRLF);
1496 break;
1497 default:
1498 fprintf(stderr,
1499 "erresc: unknown set/reset mode %d\n",
1500 *args);
1501 break;
1502 }
1503 }
1504 }
1505 }
1506 #undef MODBIT
1507
1508
1509 void
1510 csihandle(void) {
1511 switch(csiescseq.mode) {
1512 default:
1513 unknown:
1514 fprintf(stderr, "erresc: unknown csi ");
1515 csidump();
1516 /* die(""); */
1517 break;
1518 case '@': /* ICH -- Insert <n> blank char */
1519 DEFAULT(csiescseq.arg[0], 1);
1520 tinsertblank(csiescseq.arg[0]);
1521 break;
1522 case 'A': /* CUU -- Cursor <n> Up */
1523 case 'e':
1524 DEFAULT(csiescseq.arg[0], 1);
1525 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1526 break;
1527 case 'B': /* CUD -- Cursor <n> Down */
1528 DEFAULT(csiescseq.arg[0], 1);
1529 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1530 break;
1531 case 'c': /* DA -- Device Attributes */
1532 if(csiescseq.arg[0] == 0)
1533 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1534 break;
1535 case 'C': /* CUF -- Cursor <n> Forward */
1536 case 'a':
1537 DEFAULT(csiescseq.arg[0], 1);
1538 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1539 break;
1540 case 'D': /* CUB -- Cursor <n> Backward */
1541 DEFAULT(csiescseq.arg[0], 1);
1542 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1543 break;
1544 case 'E': /* CNL -- Cursor <n> Down and first col */
1545 DEFAULT(csiescseq.arg[0], 1);
1546 tmoveto(0, term.c.y+csiescseq.arg[0]);
1547 break;
1548 case 'F': /* CPL -- Cursor <n> Up and first col */
1549 DEFAULT(csiescseq.arg[0], 1);
1550 tmoveto(0, term.c.y-csiescseq.arg[0]);
1551 break;
1552 case 'g': /* TBC -- Tabulation clear */
1553 switch (csiescseq.arg[0]) {
1554 case 0: /* clear current tab stop */
1555 term.tabs[term.c.x] = 0;
1556 break;
1557 case 3: /* clear all the tabs */
1558 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1559 break;
1560 default:
1561 goto unknown;
1562 }
1563 break;
1564 case 'G': /* CHA -- Move to <col> */
1565 case '`': /* HPA */
1566 DEFAULT(csiescseq.arg[0], 1);
1567 tmoveto(csiescseq.arg[0]-1, term.c.y);
1568 break;
1569 case 'H': /* CUP -- Move to <row> <col> */
1570 case 'f': /* HVP */
1571 DEFAULT(csiescseq.arg[0], 1);
1572 DEFAULT(csiescseq.arg[1], 1);
1573 tmoveto(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1574 break;
1575 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1576 DEFAULT(csiescseq.arg[0], 1);
1577 while(csiescseq.arg[0]--)
1578 tputtab(1);
1579 break;
1580 case 'J': /* ED -- Clear screen */
1581 sel.bx = -1;
1582 switch(csiescseq.arg[0]) {
1583 case 0: /* below */
1584 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1585 if(term.c.y < term.row-1)
1586 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1587 break;
1588 case 1: /* above */
1589 if(term.c.y > 1)
1590 tclearregion(0, 0, term.col-1, term.c.y-1);
1591 tclearregion(0, term.c.y, term.c.x, term.c.y);
1592 break;
1593 case 2: /* all */
1594 tclearregion(0, 0, term.col-1, term.row-1);
1595 break;
1596 default:
1597 goto unknown;
1598 }
1599 break;
1600 case 'K': /* EL -- Clear line */
1601 switch(csiescseq.arg[0]) {
1602 case 0: /* right */
1603 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1604 break;
1605 case 1: /* left */
1606 tclearregion(0, term.c.y, term.c.x, term.c.y);
1607 break;
1608 case 2: /* all */
1609 tclearregion(0, term.c.y, term.col-1, term.c.y);
1610 break;
1611 }
1612 break;
1613 case 'S': /* SU -- Scroll <n> line up */
1614 DEFAULT(csiescseq.arg[0], 1);
1615 tscrollup(term.top, csiescseq.arg[0]);
1616 break;
1617 case 'T': /* SD -- Scroll <n> line down */
1618 DEFAULT(csiescseq.arg[0], 1);
1619 tscrolldown(term.top, csiescseq.arg[0]);
1620 break;
1621 case 'L': /* IL -- Insert <n> blank lines */
1622 DEFAULT(csiescseq.arg[0], 1);
1623 tinsertblankline(csiescseq.arg[0]);
1624 break;
1625 case 'l': /* RM -- Reset Mode */
1626 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1627 break;
1628 case 'M': /* DL -- Delete <n> lines */
1629 DEFAULT(csiescseq.arg[0], 1);
1630 tdeleteline(csiescseq.arg[0]);
1631 break;
1632 case 'X': /* ECH -- Erase <n> char */
1633 DEFAULT(csiescseq.arg[0], 1);
1634 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
1635 break;
1636 case 'P': /* DCH -- Delete <n> char */
1637 DEFAULT(csiescseq.arg[0], 1);
1638 tdeletechar(csiescseq.arg[0]);
1639 break;
1640 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1641 DEFAULT(csiescseq.arg[0], 1);
1642 while(csiescseq.arg[0]--)
1643 tputtab(0);
1644 break;
1645 case 'd': /* VPA -- Move to <row> */
1646 DEFAULT(csiescseq.arg[0], 1);
1647 tmoveto(term.c.x, csiescseq.arg[0]-1);
1648 break;
1649 case 'h': /* SM -- Set terminal mode */
1650 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1651 break;
1652 case 'm': /* SGR -- Terminal attribute (color) */
1653 tsetattr(csiescseq.arg, csiescseq.narg);
1654 break;
1655 case 'r': /* DECSTBM -- Set Scrolling Region */
1656 if(csiescseq.priv) {
1657 goto unknown;
1658 } else {
1659 DEFAULT(csiescseq.arg[0], 1);
1660 DEFAULT(csiescseq.arg[1], term.row);
1661 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1662 tmoveto(0, 0);
1663 }
1664 break;
1665 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1666 tcursor(CURSOR_SAVE);
1667 break;
1668 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1669 tcursor(CURSOR_LOAD);
1670 break;
1671 }
1672 }
1673
1674 void
1675 csidump(void) {
1676 int i;
1677 uint c;
1678
1679 printf("ESC[");
1680 for(i = 0; i < csiescseq.len; i++) {
1681 c = csiescseq.buf[i] & 0xff;
1682 if(isprint(c)) {
1683 putchar(c);
1684 } else if(c == '\n') {
1685 printf("(\\n)");
1686 } else if(c == '\r') {
1687 printf("(\\r)");
1688 } else if(c == 0x1b) {
1689 printf("(\\e)");
1690 } else {
1691 printf("(%02x)", c);
1692 }
1693 }
1694 putchar('\n');
1695 }
1696
1697 void
1698 csireset(void) {
1699 memset(&csiescseq, 0, sizeof(csiescseq));
1700 }
1701
1702 void
1703 strhandle(void) {
1704 char *p;
1705
1706 /*
1707 * TODO: make this being useful in case of color palette change.
1708 */
1709 strparse();
1710
1711 p = strescseq.buf;
1712
1713 switch(strescseq.type) {
1714 case ']': /* OSC -- Operating System Command */
1715 switch(p[0]) {
1716 case '0':
1717 case '1':
1718 case '2':
1719 /*
1720 * TODO: Handle special chars in string, like umlauts.
1721 */
1722 if(p[1] == ';') {
1723 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1724 }
1725 break;
1726 case ';':
1727 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1728 break;
1729 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1730 break;
1731 default:
1732 fprintf(stderr, "erresc: unknown str ");
1733 strdump();
1734 break;
1735 }
1736 break;
1737 case 'k': /* old title set compatibility */
1738 XStoreName(xw.dpy, xw.win, strescseq.buf);
1739 break;
1740 case 'P': /* DSC -- Device Control String */
1741 case '_': /* APC -- Application Program Command */
1742 case '^': /* PM -- Privacy Message */
1743 default:
1744 fprintf(stderr, "erresc: unknown str ");
1745 strdump();
1746 /* die(""); */
1747 break;
1748 }
1749 }
1750
1751 void
1752 strparse(void) {
1753 /*
1754 * TODO: Implement parsing like for CSI when required.
1755 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1756 */
1757 return;
1758 }
1759
1760 void
1761 strdump(void) {
1762 int i;
1763 uint c;
1764
1765 printf("ESC%c", strescseq.type);
1766 for(i = 0; i < strescseq.len; i++) {
1767 c = strescseq.buf[i] & 0xff;
1768 if(isprint(c)) {
1769 putchar(c);
1770 } else if(c == '\n') {
1771 printf("(\\n)");
1772 } else if(c == '\r') {
1773 printf("(\\r)");
1774 } else if(c == 0x1b) {
1775 printf("(\\e)");
1776 } else {
1777 printf("(%02x)", c);
1778 }
1779 }
1780 printf("ESC\\\n");
1781 }
1782
1783 void
1784 strreset(void) {
1785 memset(&strescseq, 0, sizeof(strescseq));
1786 }
1787
1788 void
1789 tputtab(bool forward) {
1790 uint x = term.c.x;
1791
1792 if(forward) {
1793 if(x == term.col)
1794 return;
1795 for(++x; x < term.col && !term.tabs[x]; ++x)
1796 /* nothing */ ;
1797 } else {
1798 if(x == 0)
1799 return;
1800 for(--x; x > 0 && !term.tabs[x]; --x)
1801 /* nothing */ ;
1802 }
1803 tmoveto(x, term.c.y);
1804 }
1805
1806 void
1807 tputc(char *c, int len) {
1808 uchar ascii = *c;
1809 bool control = ascii < '\x20' || ascii == 0177;
1810
1811 if(iofd != -1) {
1812 if (xwrite(iofd, c, len) < 0) {
1813 fprintf(stderr, "Error writting in %s:%s\n",
1814 opt_io, strerror(errno));
1815 close(iofd);
1816 iofd = -1;
1817 }
1818 }
1819 /*
1820 * STR sequences must be checked before of anything
1821 * because it can use some control codes as part of the sequence
1822 */
1823 if(term.esc & ESC_STR) {
1824 switch(ascii) {
1825 case '\033':
1826 term.esc = ESC_START | ESC_STR_END;
1827 break;
1828 case '\a': /* backwards compatibility to xterm */
1829 term.esc = 0;
1830 strhandle();
1831 break;
1832 default:
1833 strescseq.buf[strescseq.len++] = ascii;
1834 if(strescseq.len+1 >= STR_BUF_SIZ) {
1835 term.esc = 0;
1836 strhandle();
1837 }
1838 }
1839 return;
1840 }
1841 /*
1842 * Actions of control codes must be performed as soon they arrive
1843 * because they can be embedded inside a control sequence, and
1844 * they must not cause conflicts with sequences.
1845 */
1846 if(control) {
1847 switch(ascii) {
1848 case '\t': /* HT */
1849 tputtab(1);
1850 return;
1851 case '\b': /* BS */
1852 tmoveto(term.c.x-1, term.c.y);
1853 return;
1854 case '\r': /* CR */
1855 tmoveto(0, term.c.y);
1856 return;
1857 case '\f': /* LF */
1858 case '\v': /* VT */
1859 case '\n': /* LF */
1860 /* go to first col if the mode is set */
1861 tnewline(IS_SET(MODE_CRLF));
1862 return;
1863 case '\a': /* BEL */
1864 if(!(xw.state & WIN_FOCUSED))
1865 xseturgency(1);
1866 return;
1867 case '\033': /* ESC */
1868 csireset();
1869 term.esc = ESC_START;
1870 return;
1871 case '\016': /* SO */
1872 term.c.attr.mode |= ATTR_GFX;
1873 return;
1874 case '\017': /* SI */
1875 term.c.attr.mode &= ~ATTR_GFX;
1876 return;
1877 case '\032': /* SUB */
1878 case '\030': /* CAN */
1879 csireset();
1880 return;
1881 case '\005': /* ENQ (IGNORED) */
1882 case '\000': /* NUL (IGNORED) */
1883 case '\021': /* XON (IGNORED) */
1884 case '\023': /* XOFF (IGNORED) */
1885 case 0177: /* DEL (IGNORED) */
1886 return;
1887 }
1888 } else if(term.esc & ESC_START) {
1889 if(term.esc & ESC_CSI) {
1890 csiescseq.buf[csiescseq.len++] = ascii;
1891 if(BETWEEN(ascii, 0x40, 0x7E)
1892 || csiescseq.len >= ESC_BUF_SIZ) {
1893 term.esc = 0;
1894 csiparse(), csihandle();
1895 }
1896 } else if(term.esc & ESC_STR_END) {
1897 term.esc = 0;
1898 if(ascii == '\\')
1899 strhandle();
1900 } else if(term.esc & ESC_ALTCHARSET) {
1901 switch(ascii) {
1902 case '0': /* Line drawing set */
1903 term.c.attr.mode |= ATTR_GFX;
1904 break;
1905 case 'B': /* USASCII */
1906 term.c.attr.mode &= ~ATTR_GFX;
1907 break;
1908 case 'A': /* UK (IGNORED) */
1909 case '<': /* multinational charset (IGNORED) */
1910 case '5': /* Finnish (IGNORED) */
1911 case 'C': /* Finnish (IGNORED) */
1912 case 'K': /* German (IGNORED) */
1913 break;
1914 default:
1915 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1916 }
1917 term.esc = 0;
1918 } else if(term.esc & ESC_TEST) {
1919 if(ascii == '8') { /* DEC screen alignment test. */
1920 char E[UTF_SIZ] = "E";
1921 int x, y;
1922
1923 for(x = 0; x < term.col; ++x) {
1924 for(y = 0; y < term.row; ++y)
1925 tsetchar(E, &term.c.attr, x, y);
1926 }
1927 }
1928 term.esc = 0;
1929 } else {
1930 switch(ascii) {
1931 case '[':
1932 term.esc |= ESC_CSI;
1933 break;
1934 case '#':
1935 term.esc |= ESC_TEST;
1936 break;
1937 case 'P': /* DCS -- Device Control String */
1938 case '_': /* APC -- Application Program Command */
1939 case '^': /* PM -- Privacy Message */
1940 case ']': /* OSC -- Operating System Command */
1941 case 'k': /* old title set compatibility */
1942 strreset();
1943 strescseq.type = ascii;
1944 term.esc |= ESC_STR;
1945 break;
1946 case '(': /* set primary charset G0 */
1947 term.esc |= ESC_ALTCHARSET;
1948 break;
1949 case ')': /* set secondary charset G1 (IGNORED) */
1950 case '*': /* set tertiary charset G2 (IGNORED) */
1951 case '+': /* set quaternary charset G3 (IGNORED) */
1952 term.esc = 0;
1953 break;
1954 case 'D': /* IND -- Linefeed */
1955 if(term.c.y == term.bot) {
1956 tscrollup(term.top, 1);
1957 } else {
1958 tmoveto(term.c.x, term.c.y+1);
1959 }
1960 term.esc = 0;
1961 break;
1962 case 'E': /* NEL -- Next line */
1963 tnewline(1); /* always go to first col */
1964 term.esc = 0;
1965 break;
1966 case 'H': /* HTS -- Horizontal tab stop */
1967 term.tabs[term.c.x] = 1;
1968 term.esc = 0;
1969 break;
1970 case 'M': /* RI -- Reverse index */
1971 if(term.c.y == term.top) {
1972 tscrolldown(term.top, 1);
1973 } else {
1974 tmoveto(term.c.x, term.c.y-1);
1975 }
1976 term.esc = 0;
1977 break;
1978 case 'Z': /* DECID -- Identify Terminal */
1979 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1980 term.esc = 0;
1981 break;
1982 case 'c': /* RIS -- Reset to inital state */
1983 treset();
1984 term.esc = 0;
1985 xresettitle();
1986 break;
1987 case '=': /* DECPAM -- Application keypad */
1988 term.mode |= MODE_APPKEYPAD;
1989 term.esc = 0;
1990 break;
1991 case '>': /* DECPNM -- Normal keypad */
1992 term.mode &= ~MODE_APPKEYPAD;
1993 term.esc = 0;
1994 break;
1995 case '7': /* DECSC -- Save Cursor */
1996 tcursor(CURSOR_SAVE);
1997 term.esc = 0;
1998 break;
1999 case '8': /* DECRC -- Restore Cursor */
2000 tcursor(CURSOR_LOAD);
2001 term.esc = 0;
2002 break;
2003 case '\\': /* ST -- Stop */
2004 term.esc = 0;
2005 break;
2006 default:
2007 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2008 (uchar) ascii, isprint(ascii)? ascii:'.');
2009 term.esc = 0;
2010 }
2011 }
2012 /*
2013 * All characters which forms part of a sequence are not
2014 * printed
2015 */
2016 return;
2017 }
2018 /*
2019 * Display control codes only if we are in graphic mode
2020 */
2021 if(control && !(term.c.attr.mode & ATTR_GFX))
2022 return;
2023 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2024 sel.bx = -1;
2025 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2026 tnewline(1); /* always go to first col */
2027 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2028 if(term.c.x+1 < term.col)
2029 tmoveto(term.c.x+1, term.c.y);
2030 else
2031 term.c.state |= CURSOR_WRAPNEXT;
2032 }
2033
2034 int
2035 tresize(int col, int row) {
2036 int i, x;
2037 int minrow = MIN(row, term.row);
2038 int mincol = MIN(col, term.col);
2039 int slide = term.c.y - row + 1;
2040 bool *bp;
2041
2042 if(col < 1 || row < 1)
2043 return 0;
2044
2045 /* free unneeded rows */
2046 i = 0;
2047 if(slide > 0) {
2048 /* slide screen to keep cursor where we expect it -
2049 * tscrollup would work here, but we can optimize to
2050 * memmove because we're freeing the earlier lines */
2051 for(/* i = 0 */; i < slide; i++) {
2052 free(term.line[i]);
2053 free(term.alt[i]);
2054 }
2055 memmove(term.line, term.line + slide, row * sizeof(Line));
2056 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2057 }
2058 for(i += row; i < term.row; i++) {
2059 free(term.line[i]);
2060 free(term.alt[i]);
2061 }
2062
2063 /* resize to new height */
2064 term.line = xrealloc(term.line, row * sizeof(Line));
2065 term.alt = xrealloc(term.alt, row * sizeof(Line));
2066 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2067 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2068
2069 /* resize each row to new width, zero-pad if needed */
2070 for(i = 0; i < minrow; i++) {
2071 term.dirty[i] = 1;
2072 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2073 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2074 for(x = mincol; x < col; x++) {
2075 term.line[i][x].state = 0;
2076 term.alt[i][x].state = 0;
2077 }
2078 }
2079
2080 /* allocate any new rows */
2081 for(/* i == minrow */; i < row; i++) {
2082 term.dirty[i] = 1;
2083 term.line[i] = xcalloc(col, sizeof(Glyph));
2084 term.alt [i] = xcalloc(col, sizeof(Glyph));
2085 }
2086 if(col > term.col) {
2087 bp = term.tabs + term.col;
2088
2089 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2090 while(--bp > term.tabs && !*bp)
2091 /* nothing */ ;
2092 for(bp += TAB; bp < term.tabs + col; bp += TAB)
2093 *bp = 1;
2094 }
2095 /* update terminal size */
2096 term.col = col, term.row = row;
2097 /* make use of the LIMIT in tmoveto */
2098 tmoveto(term.c.x, term.c.y);
2099 /* reset scrolling region */
2100 tsetscroll(0, row-1);
2101
2102 return (slide > 0);
2103 }
2104
2105 void
2106 xresize(int col, int row) {
2107 xw.tw = MAX(1, 2*BORDER + col * xw.cw);
2108 xw.th = MAX(1, 2*BORDER + row * xw.ch);
2109
2110 XftDrawChange(xw.xft_draw, xw.buf);
2111 }
2112
2113 void
2114 xloadcols(void) {
2115 int i, r, g, b;
2116 XRenderColor xft_color = { .alpha = 0 };
2117
2118 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2119 for(i = 0; i < LEN(colorname); i++) {
2120 if(!colorname[i])
2121 continue;
2122 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.xft_col[i])) {
2123 die("Could not allocate color '%s'\n", colorname[i]);
2124 }
2125 }
2126
2127 /* load colors [16-255] ; same colors as xterm */
2128 for(i = 16, r = 0; r < 6; r++) {
2129 for(g = 0; g < 6; g++) {
2130 for(b = 0; b < 6; b++) {
2131 xft_color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
2132 xft_color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
2133 xft_color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
2134 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &xft_color, &dc.xft_col[i])) {
2135 die("Could not allocate color %d\n", i);
2136 }
2137 i++;
2138 }
2139 }
2140 }
2141
2142 for(r = 0; r < 24; r++, i++) {
2143 xft_color.red = xft_color.green = xft_color.blue = 0x0808 + 0x0a0a * r;
2144 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &xft_color,
2145 &dc.xft_col[i])) {
2146 die("Could not allocate color %d\n", i);
2147 }
2148 }
2149 }
2150
2151 void
2152 xtermclear(int col1, int row1, int col2, int row2) {
2153 XftDrawRect(xw.xft_draw,
2154 &dc.xft_col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG],
2155 BORDER + col1 * xw.cw,
2156 BORDER + row1 * xw.ch,
2157 (col2-col1+1) * xw.cw,
2158 (row2-row1+1) * xw.ch);
2159 }
2160
2161 /*
2162 * Absolute coordinates.
2163 */
2164 void
2165 xclear(int x1, int y1, int x2, int y2) {
2166 XftDrawRect(xw.xft_draw,
2167 &dc.xft_col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG],
2168 x1, y1, x2-x1, y2-y1);
2169 }
2170
2171 void
2172 xhints(void) {
2173 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
2174 XWMHints wm = {.flags = InputHint, .input = 1};
2175 XSizeHints *sizeh = NULL;
2176
2177 sizeh = XAllocSizeHints();
2178 if(xw.isfixed == False) {
2179 sizeh->flags = PSize | PResizeInc | PBaseSize;
2180 sizeh->height = xw.h;
2181 sizeh->width = xw.w;
2182 sizeh->height_inc = xw.ch;
2183 sizeh->width_inc = xw.cw;
2184 sizeh->base_height = 2*BORDER;
2185 sizeh->base_width = 2*BORDER;
2186 } else {
2187 sizeh->flags = PMaxSize | PMinSize;
2188 sizeh->min_width = sizeh->max_width = xw.fw;
2189 sizeh->min_height = sizeh->max_height = xw.fh;
2190 }
2191
2192 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2193 XFree(sizeh);
2194 }
2195
2196 void
2197 xinitfont(Font *f, char *fontstr) {
2198 FcPattern *pattern, *match;
2199 FcResult result;
2200
2201 pattern = FcNameParse((FcChar8 *)fontstr);
2202 if(!pattern)
2203 die("st: can't open font %s\n", fontstr);
2204
2205 match = XftFontMatch(xw.dpy, xw.scr, pattern, &result);
2206 FcPatternDestroy(pattern);
2207 if(!match)
2208 die("st: can't open font %s\n", fontstr);
2209 if(!(f->xft_set = XftFontOpenPattern(xw.dpy, match))) {
2210 FcPatternDestroy(match);
2211 die("st: can't open font %s.\n", fontstr);
2212 }
2213
2214 f->ascent = f->xft_set->ascent;
2215 f->descent = f->xft_set->descent;
2216 f->lbearing = 0;
2217 f->rbearing = f->xft_set->max_advance_width;
2218
2219 f->height = f->xft_set->height;
2220 f->width = f->lbearing + f->rbearing;
2221 }
2222
2223 void
2224 initfonts(char *fontstr) {
2225 char *fstr;
2226
2227 xinitfont(&dc.font, fontstr);
2228 xw.cw = dc.font.width;
2229 xw.ch = dc.font.height;
2230
2231 fstr = smstrcat(fontstr, ":weight=bold", NULL);
2232 xinitfont(&dc.bfont, fstr);
2233 free(fstr);
2234
2235 fstr = smstrcat(fontstr, ":slant=italic,oblique", NULL);
2236 xinitfont(&dc.ifont, fstr);
2237 free(fstr);
2238
2239 fstr = smstrcat(fontstr, ":weight=bold:slant=italic,oblique", NULL);
2240 xinitfont(&dc.ibfont, fstr);
2241 free(fstr);
2242 }
2243
2244 void
2245 xinit(void) {
2246 XSetWindowAttributes attrs;
2247 Cursor cursor;
2248 Window parent;
2249 int sw, sh, major, minor;
2250
2251 if(!(xw.dpy = XOpenDisplay(NULL)))
2252 die("Can't open display\n");
2253 xw.scr = XDefaultScreen(xw.dpy);
2254 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2255
2256 /* font */
2257 initfonts((opt_font != NULL)? opt_font : FONT);
2258
2259 /* colors */
2260 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2261 xloadcols();
2262
2263 /* adjust fixed window geometry */
2264 if(xw.isfixed) {
2265 sw = DisplayWidth(xw.dpy, xw.scr);
2266 sh = DisplayHeight(xw.dpy, xw.scr);
2267 if(xw.fx < 0)
2268 xw.fx = sw + xw.fx - xw.fw - 1;
2269 if(xw.fy < 0)
2270 xw.fy = sh + xw.fy - xw.fh - 1;
2271
2272 xw.h = xw.fh;
2273 xw.w = xw.fw;
2274 } else {
2275 /* window - default size */
2276 xw.h = 2*BORDER + term.row * xw.ch;
2277 xw.w = 2*BORDER + term.col * xw.cw;
2278 xw.fx = 0;
2279 xw.fy = 0;
2280 }
2281
2282 attrs.background_pixel = dc.xft_col[DefaultBG].pixel;
2283 attrs.border_pixel = dc.xft_col[DefaultBG].pixel;
2284 attrs.bit_gravity = NorthWestGravity;
2285 attrs.event_mask = FocusChangeMask | KeyPressMask
2286 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2287 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2288 attrs.colormap = xw.cmap;
2289
2290 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
2291 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2292 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2293 xw.vis,
2294 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2295 | CWColormap,
2296 &attrs);
2297
2298 /* double buffering */
2299 if(!XdbeQueryExtension(xw.dpy, &major, &minor))
2300 die("Xdbe extension is not present\n");
2301 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
2302
2303 /* Xft rendering context */
2304 xw.xft_draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2305
2306 /* input methods */
2307 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
2308 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2309 | XIMStatusNothing, XNClientWindow, xw.win,
2310 XNFocusWindow, xw.win, NULL);
2311 /* gc */
2312 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
2313
2314 /* white cursor, black outline */
2315 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2316 XDefineCursor(xw.dpy, xw.win, cursor);
2317 XRecolorCursor(xw.dpy, cursor,
2318 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2319 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2320
2321 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2322 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2323 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2324
2325 xresettitle();
2326 XMapWindow(xw.dpy, xw.win);
2327 xhints();
2328 XSync(xw.dpy, 0);
2329 }
2330
2331 void
2332 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2333 int winx = BORDER + x * xw.cw, winy = BORDER + y * xw.ch,
2334 width = charlen * xw.cw;
2335 Font *font = &dc.font;
2336 XGlyphInfo extents;
2337 XftColor *fg = &dc.xft_col[base.fg], *bg = &dc.xft_col[base.bg],
2338 *temp, revfg, revbg;
2339 XRenderColor colfg, colbg;
2340
2341 if(base.mode & ATTR_REVERSE)
2342 temp = fg, fg = bg, bg = temp;
2343
2344 if(base.mode & ATTR_BOLD) {
2345 if(BETWEEN(base.fg, 0, 7)) {
2346 /* basic system colors */
2347 fg = &dc.xft_col[base.fg + 8];
2348 } else if(BETWEEN(base.fg, 16, 195)) {
2349 /* 256 colors */
2350 fg = &dc.xft_col[base.fg + 36];
2351 } else if(BETWEEN(base.fg, 232, 251)) {
2352 /* greyscale */
2353 fg = &dc.xft_col[base.fg + 4];
2354 }
2355 /*
2356 * Those ranges will not be brightened:
2357 * 8 - 15 – bright system colors
2358 * 196 - 231 – highest 256 color cube
2359 * 252 - 255 – brightest colors in greyscale
2360 */
2361 font = &dc.bfont;
2362 }
2363
2364 if(base.mode & ATTR_ITALIC)
2365 font = &dc.ifont;
2366 if(base.mode & (ATTR_ITALIC|ATTR_ITALIC))
2367 font = &dc.ibfont;
2368
2369 if(IS_SET(MODE_REVERSE)) {
2370 if(fg == &dc.xft_col[DefaultFG]) {
2371 fg = &dc.xft_col[DefaultBG];
2372 } else {
2373 colfg.red = ~fg->color.red;
2374 colfg.green = ~fg->color.green;
2375 colfg.blue = ~fg->color.blue;
2376 colfg.alpha = fg->color.alpha;
2377 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2378 fg = &revfg;
2379 }
2380
2381 if(bg == &dc.xft_col[DefaultBG]) {
2382 bg = &dc.xft_col[DefaultFG];
2383 } else {
2384 colbg.red = ~bg->color.red;
2385 colbg.green = ~bg->color.green;
2386 colbg.blue = ~bg->color.blue;
2387 colbg.alpha = bg->color.alpha;
2388 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2389 bg = &revbg;
2390 }
2391 }
2392
2393 XftTextExtentsUtf8(xw.dpy, font->xft_set, (FcChar8 *)s, bytelen,
2394 &extents);
2395 width = extents.xOff;
2396
2397 /* Intelligent cleaning up of the borders. */
2398 if(x == 0) {
2399 xclear(0, (y == 0)? 0 : winy, BORDER,
2400 winy + xw.ch + (y == term.row-1)? xw.h : 0);
2401 }
2402 if(x + charlen >= term.col-1) {
2403 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2404 (y == term.row-1)? xw.h : (winy + xw.ch));
2405 }
2406 if(y == 0)
2407 xclear(winx, 0, winx + width, BORDER);
2408 if(y == term.row-1)
2409 xclear(winx, winy + xw.ch, winx + width, xw.h);
2410
2411 XftDrawRect(xw.xft_draw, bg, winx, winy, width, xw.ch);
2412 XftDrawStringUtf8(xw.xft_draw, fg, font->xft_set, winx,
2413 winy + font->ascent, (FcChar8 *)s, bytelen);
2414
2415 if(base.mode & ATTR_UNDERLINE) {
2416 XftDrawRect(xw.xft_draw, fg, winx, winy + font->ascent + 1,
2417 width, 1);
2418 }
2419 }
2420
2421 void
2422 xdrawcursor(void) {
2423 static int oldx = 0, oldy = 0;
2424 int sl;
2425 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
2426
2427 LIMIT(oldx, 0, term.col-1);
2428 LIMIT(oldy, 0, term.row-1);
2429
2430 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2431 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2432
2433 /* remove the old cursor */
2434 if(term.line[oldy][oldx].state & GLYPH_SET) {
2435 sl = utf8size(term.line[oldy][oldx].c);
2436 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2437 oldy, 1, sl);
2438 } else {
2439 xtermclear(oldx, oldy, oldx, oldy);
2440 }
2441
2442 /* draw the new one */
2443 if(!(term.c.state & CURSOR_HIDE)) {
2444 if(!(xw.state & WIN_FOCUSED))
2445 g.bg = DefaultUCS;
2446
2447 if(IS_SET(MODE_REVERSE))
2448 g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
2449
2450 sl = utf8size(g.c);
2451 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2452 oldx = term.c.x, oldy = term.c.y;
2453 }
2454 }
2455
2456 void
2457 xresettitle(void) {
2458 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
2459 }
2460
2461 void
2462 redraw(void) {
2463 struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
2464
2465 tfulldirt();
2466 draw();
2467 XSync(xw.dpy, False); /* necessary for a good tput flash */
2468 nanosleep(&tv, NULL);
2469 }
2470
2471 void
2472 draw(void) {
2473 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2474
2475 drawregion(0, 0, term.col, term.row);
2476 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2477 }
2478
2479 void
2480 drawregion(int x1, int y1, int x2, int y2) {
2481 int ic, ib, x, y, ox, sl;
2482 Glyph base, new;
2483 char buf[DRAW_BUF_SIZ];
2484 bool ena_sel = sel.bx != -1, alt = IS_SET(MODE_ALTSCREEN);
2485
2486 if((sel.alt && !alt) || (!sel.alt && alt))
2487 ena_sel = 0;
2488 if(!(xw.state & WIN_VISIBLE))
2489 return;
2490
2491 for(y = y1; y < y2; y++) {
2492 if(!term.dirty[y])
2493 continue;
2494
2495 xtermclear(0, y, term.col, y);
2496 term.dirty[y] = 0;
2497 base = term.line[y][0];
2498 ic = ib = ox = 0;
2499 for(x = x1; x < x2; x++) {
2500 new = term.line[y][x];
2501 if(ena_sel && *(new.c) && selected(x, y))
2502 new.mode ^= ATTR_REVERSE;
2503 if(ib > 0 && (!(new.state & GLYPH_SET)
2504 || ATTRCMP(base, new)
2505 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2506 xdraws(buf, base, ox, y, ic, ib);
2507 ic = ib = 0;
2508 }
2509 if(new.state & GLYPH_SET) {
2510 if(ib == 0) {
2511 ox = x;
2512 base = new;
2513 }
2514 sl = utf8size(new.c);
2515 memcpy(buf+ib, new.c, sl);
2516 ib += sl;
2517 ++ic;
2518 }
2519 }
2520 if(ib > 0)
2521 xdraws(buf, base, ox, y, ic, ib);
2522 }
2523 xdrawcursor();
2524 }
2525
2526 void
2527 expose(XEvent *ev) {
2528 XExposeEvent *e = &ev->xexpose;
2529
2530 if(xw.state & WIN_REDRAW) {
2531 if(!e->count)
2532 xw.state &= ~WIN_REDRAW;
2533 }
2534 }
2535
2536 void
2537 visibility(XEvent *ev) {
2538 XVisibilityEvent *e = &ev->xvisibility;
2539
2540 if(e->state == VisibilityFullyObscured) {
2541 xw.state &= ~WIN_VISIBLE;
2542 } else if(!(xw.state & WIN_VISIBLE)) {
2543 /* need a full redraw for next Expose, not just a buf copy */
2544 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2545 }
2546 }
2547
2548 void
2549 unmap(XEvent *ev) {
2550 xw.state &= ~WIN_VISIBLE;
2551 }
2552
2553 void
2554 xseturgency(int add) {
2555 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2556
2557 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2558 XSetWMHints(xw.dpy, xw.win, h);
2559 XFree(h);
2560 }
2561
2562 void
2563 focus(XEvent *ev) {
2564 if(ev->type == FocusIn) {
2565 xw.state |= WIN_FOCUSED;
2566 xseturgency(0);
2567 } else {
2568 xw.state &= ~WIN_FOCUSED;
2569 }
2570 }
2571
2572 char*
2573 kmap(KeySym k, uint state) {
2574 int i;
2575 uint mask;
2576
2577 state &= ~Mod2Mask;
2578 for(i = 0; i < LEN(key); i++) {
2579 mask = key[i].mask;
2580
2581 if(key[i].k == k && ((state & mask) == mask
2582 || (mask == XK_NO_MOD && !state))) {
2583 return (char*)key[i].s;
2584 }
2585 }
2586 return NULL;
2587 }
2588
2589 void
2590 kpress(XEvent *ev) {
2591 XKeyEvent *e = &ev->xkey;
2592 KeySym ksym;
2593 char buf[32];
2594 char *customkey;
2595 int len;
2596 int meta;
2597 int shift;
2598 Status status;
2599
2600 if (IS_SET(MODE_KBDLOCK))
2601 return;
2602
2603 meta = e->state & Mod1Mask;
2604 shift = e->state & ShiftMask;
2605 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
2606
2607 /* 1. custom keys from config.h */
2608 if((customkey = kmap(ksym, e->state))) {
2609 ttywrite(customkey, strlen(customkey));
2610 /* 2. hardcoded (overrides X lookup) */
2611 } else {
2612 switch(ksym) {
2613 case XK_Up:
2614 case XK_Down:
2615 case XK_Left:
2616 case XK_Right:
2617 /* XXX: shift up/down doesn't work */
2618 sprintf(buf, "\033%c%c",
2619 IS_SET(MODE_APPKEYPAD) ? 'O' : '[',
2620 (shift ? "dacb":"DACB")[ksym - XK_Left]);
2621 ttywrite(buf, 3);
2622 break;
2623 case XK_Insert:
2624 if(shift)
2625 selpaste();
2626 break;
2627 case XK_Return:
2628 if(IS_SET(MODE_CRLF)) {
2629 ttywrite("\r\n", 2);
2630 } else {
2631 ttywrite("\r", 1);
2632 }
2633 break;
2634 /* 3. X lookup */
2635 default:
2636 if(len > 0) {
2637 if(meta && len == 1)
2638 ttywrite("\033", 1);
2639 ttywrite(buf, len);
2640 }
2641 break;
2642 }
2643 }
2644 }
2645
2646 void
2647 cmessage(XEvent *e) {
2648 /* See xembed specs
2649 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2650 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2651 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2652 xw.state |= WIN_FOCUSED;
2653 xseturgency(0);
2654 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2655 xw.state &= ~WIN_FOCUSED;
2656 }
2657 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
2658 /* Send SIGHUP to shell */
2659 kill(pid, SIGHUP);
2660 exit(EXIT_SUCCESS);
2661 }
2662 }
2663
2664 void
2665 resize(XEvent *e) {
2666 int col, row;
2667
2668 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2669 return;
2670
2671 xw.w = e->xconfigure.width;
2672 xw.h = e->xconfigure.height;
2673 col = (xw.w - 2*BORDER) / xw.cw;
2674 row = (xw.h - 2*BORDER) / xw.ch;
2675 if(col == term.col && row == term.row)
2676 return;
2677
2678 tresize(col, row);
2679 xresize(col, row);
2680 ttyresize();
2681 }
2682
2683 void
2684 run(void) {
2685 XEvent ev;
2686 fd_set rfd;
2687 int xfd = XConnectionNumber(xw.dpy), i;
2688 struct timeval drawtimeout, *tv = NULL;
2689
2690 for(i = 0;; i++) {
2691 FD_ZERO(&rfd);
2692 FD_SET(cmdfd, &rfd);
2693 FD_SET(xfd, &rfd);
2694 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
2695 if(errno == EINTR)
2696 continue;
2697 die("select failed: %s\n", SERRNO);
2698 }
2699
2700 /*
2701 * Stop after a certain number of reads so the user does not
2702 * feel like the system is stuttering.
2703 */
2704 if(i < 1000 && FD_ISSET(cmdfd, &rfd)) {
2705 ttyread();
2706
2707 /*
2708 * Just wait a bit so it isn't disturbing the
2709 * user and the system is able to write something.
2710 */
2711 drawtimeout.tv_sec = 0;
2712 drawtimeout.tv_usec = 5;
2713 tv = &drawtimeout;
2714 continue;
2715 }
2716 i = 0;
2717 tv = NULL;
2718
2719 while(XPending(xw.dpy)) {
2720 XNextEvent(xw.dpy, &ev);
2721 if(XFilterEvent(&ev, xw.win))
2722 continue;
2723 if(handler[ev.type])
2724 (handler[ev.type])(&ev);
2725 }
2726
2727 draw();
2728 XFlush(xw.dpy);
2729 }
2730 }
2731
2732 int
2733 main(int argc, char *argv[]) {
2734 int i, bitm, xr, yr;
2735 uint wr, hr;
2736
2737 xw.fw = xw.fh = xw.fx = xw.fy = 0;
2738 xw.isfixed = False;
2739
2740 for(i = 1; i < argc; i++) {
2741 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2742 case 'c':
2743 if(++i < argc)
2744 opt_class = argv[i];
2745 break;
2746 case 'e':
2747 /* eat every remaining arguments */
2748 if(++i < argc)
2749 opt_cmd = &argv[i];
2750 goto run;
2751 case 'f':
2752 if(++i < argc)
2753 opt_font = argv[i];
2754 break;
2755 case 'g':
2756 if(++i >= argc)
2757 break;
2758
2759 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
2760 if(bitm & XValue)
2761 xw.fx = xr;
2762 if(bitm & YValue)
2763 xw.fy = yr;
2764 if(bitm & WidthValue)
2765 xw.fw = (int)wr;
2766 if(bitm & HeightValue)
2767 xw.fh = (int)hr;
2768 if(bitm & XNegative && xw.fx == 0)
2769 xw.fx = -1;
2770 if(bitm & XNegative && xw.fy == 0)
2771 xw.fy = -1;
2772
2773 if(xw.fh != 0 && xw.fw != 0)
2774 xw.isfixed = True;
2775 break;
2776 case 'o':
2777 if(++i < argc)
2778 opt_io = argv[i];
2779 break;
2780 case 't':
2781 if(++i < argc)
2782 opt_title = argv[i];
2783 break;
2784 case 'v':
2785 default:
2786 die(USAGE);
2787 case 'w':
2788 if(++i < argc)
2789 opt_embed = argv[i];
2790 break;
2791 }
2792 }
2793
2794 run:
2795 setlocale(LC_CTYPE, "");
2796 tnew(80, 24);
2797 ttynew();
2798 xinit();
2799 selinit();
2800 run();
2801 return 0;
2802 }
2803