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f54e4d5ce8bf42c1bcc589a246a62c2f4e464936
[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #define _XOPEN_SOURCE 600
3 #include <ctype.h>
4 #include <errno.h>
5 #include <fcntl.h>
6 #include <limits.h>
7 #include <locale.h>
8 #include <pwd.h>
9 #include <stdarg.h>
10 #include <stdbool.h>
11 #include <stdio.h>
12 #include <stdlib.h>
13 #include <string.h>
14 #include <signal.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <sys/stat.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <sys/wait.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <X11/Xatom.h>
24 #include <X11/Xlib.h>
25 #include <X11/Xutil.h>
26 #include <X11/cursorfont.h>
27 #include <X11/keysym.h>
28 #include <X11/extensions/Xdbe.h>
29 #include <X11/Xft/Xft.h>
30 #include <fontconfig/fontconfig.h>
31 #define Glyph Glyph_
32 #define Font Font_
33
34 #if defined(__linux)
35 #include <pty.h>
36 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
37 #include <util.h>
38 #elif defined(__FreeBSD__) || defined(__DragonFly__)
39 #include <libutil.h>
40 #endif
41
42 #define USAGE \
43 "st " VERSION " (c) 2010-2012 st engineers\n" \
44 "usage: st [-v] [-c class] [-f font] [-g geometry] [-o file]" \
45 " [-t title] [-w windowid] [-e command ...]\n"
46
47 /* XEMBED messages */
48 #define XEMBED_FOCUS_IN 4
49 #define XEMBED_FOCUS_OUT 5
50
51 /* Arbitrary sizes */
52 #define ESC_BUF_SIZ 256
53 #define ESC_ARG_SIZ 16
54 #define STR_BUF_SIZ 256
55 #define STR_ARG_SIZ 16
56 #define DRAW_BUF_SIZ 20*1024
57 #define UTF_SIZ 4
58 #define XK_NO_MOD UINT_MAX
59 #define XK_ANY_MOD 0
60
61 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
62
63 #define SERRNO strerror(errno)
64 #define MIN(a, b) ((a) < (b) ? (a) : (b))
65 #define MAX(a, b) ((a) < (b) ? (b) : (a))
66 #define LEN(a) (sizeof(a) / sizeof(a[0]))
67 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
68 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
69 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
70 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
71 #define IS_SET(flag) (term.mode & (flag))
72 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
73 #define X2COL(x) (((x) - BORDER)/xw.cw)
74 #define Y2ROW(y) (((y) - BORDER)/xw.ch)
75
76 #define VT102ID "\033[?6c"
77
78 enum glyph_attribute {
79 ATTR_NULL = 0,
80 ATTR_REVERSE = 1,
81 ATTR_UNDERLINE = 2,
82 ATTR_BOLD = 4,
83 ATTR_GFX = 8,
84 ATTR_ITALIC = 16,
85 ATTR_BLINK = 32,
86 };
87
88 enum cursor_movement {
89 CURSOR_UP,
90 CURSOR_DOWN,
91 CURSOR_LEFT,
92 CURSOR_RIGHT,
93 CURSOR_SAVE,
94 CURSOR_LOAD
95 };
96
97 enum cursor_state {
98 CURSOR_DEFAULT = 0,
99 CURSOR_HIDE = 1,
100 CURSOR_WRAPNEXT = 2
101 };
102
103 enum glyph_state {
104 GLYPH_SET = 1,
105 GLYPH_DIRTY = 2
106 };
107
108 enum term_mode {
109 MODE_WRAP = 1,
110 MODE_INSERT = 2,
111 MODE_APPKEYPAD = 4,
112 MODE_ALTSCREEN = 8,
113 MODE_CRLF = 16,
114 MODE_MOUSEBTN = 32,
115 MODE_MOUSEMOTION = 64,
116 MODE_MOUSE = 32|64,
117 MODE_REVERSE = 128,
118 MODE_KBDLOCK = 256
119 };
120
121 enum escape_state {
122 ESC_START = 1,
123 ESC_CSI = 2,
124 ESC_STR = 4, /* DSC, OSC, PM, APC */
125 ESC_ALTCHARSET = 8,
126 ESC_STR_END = 16, /* a final string was encountered */
127 ESC_TEST = 32, /* Enter in test mode */
128 };
129
130 enum window_state {
131 WIN_VISIBLE = 1,
132 WIN_REDRAW = 2,
133 WIN_FOCUSED = 4
134 };
135
136 /* bit macro */
137 #undef B0
138 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
139
140 typedef unsigned char uchar;
141 typedef unsigned int uint;
142 typedef unsigned long ulong;
143 typedef unsigned short ushort;
144
145 typedef struct {
146 char c[UTF_SIZ]; /* character code */
147 uchar mode; /* attribute flags */
148 ushort fg; /* foreground */
149 ushort bg; /* background */
150 uchar state; /* state flags */
151 } Glyph;
152
153 typedef Glyph* Line;
154
155 typedef struct {
156 Glyph attr; /* current char attributes */
157 int x;
158 int y;
159 char state;
160 } TCursor;
161
162 /* CSI Escape sequence structs */
163 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
164 typedef struct {
165 char buf[ESC_BUF_SIZ]; /* raw string */
166 int len; /* raw string length */
167 char priv;
168 int arg[ESC_ARG_SIZ];
169 int narg; /* nb of args */
170 char mode;
171 } CSIEscape;
172
173 /* STR Escape sequence structs */
174 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
175 typedef struct {
176 char type; /* ESC type ... */
177 char buf[STR_BUF_SIZ]; /* raw string */
178 int len; /* raw string length */
179 char *args[STR_ARG_SIZ];
180 int narg; /* nb of args */
181 } STREscape;
182
183 /* Internal representation of the screen */
184 typedef struct {
185 int row; /* nb row */
186 int col; /* nb col */
187 Line *line; /* screen */
188 Line *alt; /* alternate screen */
189 bool *dirty; /* dirtyness of lines */
190 TCursor c; /* cursor */
191 int top; /* top scroll limit */
192 int bot; /* bottom scroll limit */
193 int mode; /* terminal mode flags */
194 int esc; /* escape state flags */
195 bool *tabs;
196 } Term;
197
198 /* Purely graphic info */
199 typedef struct {
200 Display* dpy;
201 Colormap cmap;
202 Window win;
203 XdbeBackBuffer buf;
204 Atom xembed, wmdeletewin;
205 XIM xim;
206 XIC xic;
207 XftDraw *xft_draw;
208 Visual *vis;
209 int scr;
210 bool isfixed; /* is fixed geometry? */
211 int fx, fy, fw, fh; /* fixed geometry */
212 int tw, th; /* tty width and height */
213 int w; /* window width */
214 int h; /* window height */
215 int ch; /* char height */
216 int cw; /* char width */
217 char state; /* focus, redraw, visible */
218 } XWindow;
219
220 typedef struct {
221 KeySym k;
222 uint mask;
223 char s[ESC_BUF_SIZ];
224 } Key;
225
226 /* TODO: use better name for vars... */
227 typedef struct {
228 int mode;
229 int bx, by;
230 int ex, ey;
231 struct {
232 int x, y;
233 } b, e;
234 char *clip;
235 Atom xtarget;
236 bool alt;
237 struct timeval tclick1;
238 struct timeval tclick2;
239 } Selection;
240
241 #include "config.h"
242
243 /* Font structure */
244 typedef struct {
245 int height;
246 int width;
247 int ascent;
248 int descent;
249 short lbearing;
250 short rbearing;
251 XftFont *xft_set;
252 } Font;
253
254 /* Drawing Context */
255 typedef struct {
256 XftColor xft_col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
257 GC gc;
258 Font font, bfont, ifont, ibfont;
259 } DC;
260
261 static void die(const char *, ...);
262 static void draw(void);
263 static void redraw(void);
264 static void drawregion(int, int, int, int);
265 static void execsh(void);
266 static void sigchld(int);
267 static void run(void);
268
269 static void csidump(void);
270 static void csihandle(void);
271 static void csiparse(void);
272 static void csireset(void);
273 static void strdump(void);
274 static void strhandle(void);
275 static void strparse(void);
276 static void strreset(void);
277
278 static void tclearregion(int, int, int, int);
279 static void tcursor(int);
280 static void tdeletechar(int);
281 static void tdeleteline(int);
282 static void tinsertblank(int);
283 static void tinsertblankline(int);
284 static void tmoveto(int, int);
285 static void tnew(int, int);
286 static void tnewline(int);
287 static void tputtab(bool);
288 static void tputc(char *, int);
289 static void treset(void);
290 static int tresize(int, int);
291 static void tscrollup(int, int);
292 static void tscrolldown(int, int);
293 static void tsetattr(int*, int);
294 static void tsetchar(char *, Glyph *, int, int);
295 static void tsetscroll(int, int);
296 static void tswapscreen(void);
297 static void tsetdirt(int, int);
298 static void tsetmode(bool, bool, int *, int);
299 static void tfulldirt(void);
300
301 static void ttynew(void);
302 static void ttyread(void);
303 static void ttyresize(void);
304 static void ttywrite(const char *, size_t);
305
306 static void xdraws(char *, Glyph, int, int, int, int);
307 static void xhints(void);
308 static void xclear(int, int, int, int);
309 static void xdrawcursor(void);
310 static void xinit(void);
311 static void xloadcols(void);
312 static void xresettitle(void);
313 static void xseturgency(int);
314 static void xsetsel(char*);
315 static void xtermclear(int, int, int, int);
316 static void xresize(int, int);
317
318 static void expose(XEvent *);
319 static void visibility(XEvent *);
320 static void unmap(XEvent *);
321 static char *kmap(KeySym, uint);
322 static void kpress(XEvent *);
323 static void cmessage(XEvent *);
324 static void resize(XEvent *);
325 static void focus(XEvent *);
326 static void brelease(XEvent *);
327 static void bpress(XEvent *);
328 static void bmotion(XEvent *);
329 static void selnotify(XEvent *);
330 static void selclear(XEvent *);
331 static void selrequest(XEvent *);
332
333 static void selinit(void);
334 static inline bool selected(int, int);
335 static void selcopy(void);
336 static void selpaste(void);
337 static void selscroll(int, int);
338
339 static int utf8decode(char *, long *);
340 static int utf8encode(long *, char *);
341 static int utf8size(char *);
342 static int isfullutf8(char *, int);
343
344 static ssize_t xwrite(int, char *, size_t);
345 static void *xmalloc(size_t);
346 static void *xrealloc(void *, size_t);
347 static void *xcalloc(size_t nmemb, size_t size);
348 static char *smstrcat(char *, ...);
349
350 static void (*handler[LASTEvent])(XEvent *) = {
351 [KeyPress] = kpress,
352 [ClientMessage] = cmessage,
353 [ConfigureNotify] = resize,
354 [VisibilityNotify] = visibility,
355 [UnmapNotify] = unmap,
356 [Expose] = expose,
357 [FocusIn] = focus,
358 [FocusOut] = focus,
359 [MotionNotify] = bmotion,
360 [ButtonPress] = bpress,
361 [ButtonRelease] = brelease,
362 [SelectionClear] = selclear,
363 [SelectionNotify] = selnotify,
364 [SelectionRequest] = selrequest,
365 };
366
367 /* Globals */
368 static DC dc;
369 static XWindow xw;
370 static Term term;
371 static CSIEscape csiescseq;
372 static STREscape strescseq;
373 static int cmdfd;
374 static pid_t pid;
375 static Selection sel;
376 static int iofd = -1;
377 static char **opt_cmd = NULL;
378 static char *opt_io = NULL;
379 static char *opt_title = NULL;
380 static char *opt_embed = NULL;
381 static char *opt_class = NULL;
382 static char *opt_font = NULL;
383
384
385 ssize_t
386 xwrite(int fd, char *s, size_t len) {
387 size_t aux = len;
388
389 while(len > 0) {
390 ssize_t r = write(fd, s, len);
391 if(r < 0)
392 return r;
393 len -= r;
394 s += r;
395 }
396 return aux;
397 }
398
399 void *
400 xmalloc(size_t len) {
401 void *p = malloc(len);
402
403 if(!p)
404 die("Out of memory\n");
405
406 return p;
407 }
408
409 void *
410 xrealloc(void *p, size_t len) {
411 if((p = realloc(p, len)) == NULL)
412 die("Out of memory\n");
413
414 return p;
415 }
416
417 void *
418 xcalloc(size_t nmemb, size_t size) {
419 void *p = calloc(nmemb, size);
420
421 if(!p)
422 die("Out of memory\n");
423
424 return p;
425 }
426
427 char *
428 smstrcat(char *src, ...)
429 {
430 va_list fmtargs;
431 char *ret, *p, *v;
432 int len, slen, flen;
433
434 len = slen = strlen(src);
435
436 va_start(fmtargs, src);
437 for(;;) {
438 v = va_arg(fmtargs, char *);
439 if(v == NULL)
440 break;
441 len += strlen(v);
442 }
443 va_end(fmtargs);
444
445 p = ret = xmalloc(len+1);
446 memmove(p, src, slen);
447 p += slen;
448
449 va_start(fmtargs, src);
450 for(;;) {
451 v = va_arg(fmtargs, char *);
452 if(v == NULL)
453 break;
454 flen = strlen(v);
455 memmove(p, v, flen);
456 p += flen;
457 }
458 va_end(fmtargs);
459
460 ret[len] = '\0';
461
462 return ret;
463 }
464
465 int
466 utf8decode(char *s, long *u) {
467 uchar c;
468 int i, n, rtn;
469
470 rtn = 1;
471 c = *s;
472 if(~c & B7) { /* 0xxxxxxx */
473 *u = c;
474 return rtn;
475 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
476 *u = c&(B4|B3|B2|B1|B0);
477 n = 1;
478 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
479 *u = c&(B3|B2|B1|B0);
480 n = 2;
481 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
482 *u = c & (B2|B1|B0);
483 n = 3;
484 } else {
485 goto invalid;
486 }
487
488 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
489 c = *s;
490 if((c & (B7|B6)) != B7) /* 10xxxxxx */
491 goto invalid;
492 *u <<= 6;
493 *u |= c & (B5|B4|B3|B2|B1|B0);
494 }
495
496 if((n == 1 && *u < 0x80) ||
497 (n == 2 && *u < 0x800) ||
498 (n == 3 && *u < 0x10000) ||
499 (*u >= 0xD800 && *u <= 0xDFFF)) {
500 goto invalid;
501 }
502
503 return rtn;
504 invalid:
505 *u = 0xFFFD;
506
507 return rtn;
508 }
509
510 int
511 utf8encode(long *u, char *s) {
512 uchar *sp;
513 ulong uc;
514 int i, n;
515
516 sp = (uchar *)s;
517 uc = *u;
518 if(uc < 0x80) {
519 *sp = uc; /* 0xxxxxxx */
520 return 1;
521 } else if(*u < 0x800) {
522 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
523 n = 1;
524 } else if(uc < 0x10000) {
525 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
526 n = 2;
527 } else if(uc <= 0x10FFFF) {
528 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
529 n = 3;
530 } else {
531 goto invalid;
532 }
533
534 for(i=n,++sp; i>0; --i,++sp)
535 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
536
537 return n+1;
538 invalid:
539 /* U+FFFD */
540 *s++ = '\xEF';
541 *s++ = '\xBF';
542 *s = '\xBD';
543
544 return 3;
545 }
546
547 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
548 UTF-8 otherwise return 0 */
549 int
550 isfullutf8(char *s, int b) {
551 uchar *c1, *c2, *c3;
552
553 c1 = (uchar *)s;
554 c2 = (uchar *)++s;
555 c3 = (uchar *)++s;
556 if(b < 1) {
557 return 0;
558 } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
559 return 0;
560 } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
561 ((b == 1) ||
562 ((b == 2) && (*c2&(B7|B6)) == B7))) {
563 return 0;
564 } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
565 ((b == 1) ||
566 ((b == 2) && (*c2&(B7|B6)) == B7) ||
567 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
568 return 0;
569 } else {
570 return 1;
571 }
572 }
573
574 int
575 utf8size(char *s) {
576 uchar c = *s;
577
578 if(~c&B7) {
579 return 1;
580 } else if((c&(B7|B6|B5)) == (B7|B6)) {
581 return 2;
582 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
583 return 3;
584 } else {
585 return 4;
586 }
587 }
588
589 void
590 selinit(void) {
591 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
592 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
593 sel.mode = 0;
594 sel.bx = -1;
595 sel.clip = NULL;
596 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
597 if(sel.xtarget == None)
598 sel.xtarget = XA_STRING;
599 }
600
601 static inline bool
602 selected(int x, int y) {
603 int bx, ex;
604
605 if(sel.ey == y && sel.by == y) {
606 bx = MIN(sel.bx, sel.ex);
607 ex = MAX(sel.bx, sel.ex);
608 return BETWEEN(x, bx, ex);
609 }
610
611 return ((sel.b.y < y && y < sel.e.y)
612 || (y == sel.e.y && x <= sel.e.x))
613 || (y == sel.b.y && x >= sel.b.x
614 && (x <= sel.e.x || sel.b.y != sel.e.y));
615 }
616
617 void
618 getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
619 if(b)
620 *b = e->xbutton.button;
621
622 *x = X2COL(e->xbutton.x);
623 *y = Y2ROW(e->xbutton.y);
624 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
625 sel.b.y = MIN(sel.by, sel.ey);
626 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
627 sel.e.y = MAX(sel.by, sel.ey);
628 }
629
630 void
631 mousereport(XEvent *e) {
632 int x = X2COL(e->xbutton.x);
633 int y = Y2ROW(e->xbutton.y);
634 int button = e->xbutton.button;
635 int state = e->xbutton.state;
636 char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
637 static int ob, ox, oy;
638
639 /* from urxvt */
640 if(e->xbutton.type == MotionNotify) {
641 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
642 return;
643 button = ob + 32;
644 ox = x, oy = y;
645 } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
646 button = 3;
647 } else {
648 button -= Button1;
649 if(button >= 3)
650 button += 64 - 3;
651 if(e->xbutton.type == ButtonPress) {
652 ob = button;
653 ox = x, oy = y;
654 }
655 }
656
657 buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
658 + (state & Mod4Mask ? 8 : 0)
659 + (state & ControlMask ? 16 : 0);
660
661 ttywrite(buf, sizeof(buf));
662 }
663
664 void
665 bpress(XEvent *e) {
666 if(IS_SET(MODE_MOUSE)) {
667 mousereport(e);
668 } else if(e->xbutton.button == Button1) {
669 if(sel.bx != -1) {
670 sel.bx = -1;
671 tsetdirt(sel.b.y, sel.e.y);
672 draw();
673 }
674 sel.mode = 1;
675 sel.ex = sel.bx = X2COL(e->xbutton.x);
676 sel.ey = sel.by = Y2ROW(e->xbutton.y);
677 }
678 }
679
680 void
681 selcopy(void) {
682 char *str, *ptr;
683 int x, y, bufsize, is_selected = 0, size;
684 Glyph *gp;
685
686 if(sel.bx == -1) {
687 str = NULL;
688 } else {
689 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
690 ptr = str = xmalloc(bufsize);
691
692 /* append every set & selected glyph to the selection */
693 for(y = 0; y < term.row; y++) {
694 for(x = 0; x < term.col; x++) {
695 gp = &term.line[y][x];
696
697 if(!(is_selected = selected(x, y))
698 || !(gp->state & GLYPH_SET)) {
699 continue;
700 }
701 size = utf8size(gp->c);
702 memcpy(ptr, gp->c, size);
703 ptr += size;
704 }
705 /* \n at the end of every selected line except for the last one */
706 if(is_selected && y < sel.e.y)
707 *ptr++ = '\n';
708 }
709 *ptr = 0;
710 }
711 sel.alt = IS_SET(MODE_ALTSCREEN);
712 xsetsel(str);
713 }
714
715 void
716 selnotify(XEvent *e) {
717 ulong nitems, ofs, rem;
718 int format;
719 uchar *data;
720 Atom type;
721
722 ofs = 0;
723 do {
724 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
725 False, AnyPropertyType, &type, &format,
726 &nitems, &rem, &data)) {
727 fprintf(stderr, "Clipboard allocation failed\n");
728 return;
729 }
730 ttywrite((const char *) data, nitems * format / 8);
731 XFree(data);
732 /* number of 32-bit chunks returned */
733 ofs += nitems * format / 32;
734 } while(rem > 0);
735 }
736
737 void
738 selpaste(void) {
739 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
740 xw.win, CurrentTime);
741 }
742
743 void selclear(XEvent *e) {
744 if(sel.bx == -1)
745 return;
746 sel.bx = -1;
747 tsetdirt(sel.b.y, sel.e.y);
748 }
749
750 void
751 selrequest(XEvent *e) {
752 XSelectionRequestEvent *xsre;
753 XSelectionEvent xev;
754 Atom xa_targets, string;
755
756 xsre = (XSelectionRequestEvent *) e;
757 xev.type = SelectionNotify;
758 xev.requestor = xsre->requestor;
759 xev.selection = xsre->selection;
760 xev.target = xsre->target;
761 xev.time = xsre->time;
762 /* reject */
763 xev.property = None;
764
765 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
766 if(xsre->target == xa_targets) {
767 /* respond with the supported type */
768 string = sel.xtarget;
769 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
770 XA_ATOM, 32, PropModeReplace,
771 (uchar *) &string, 1);
772 xev.property = xsre->property;
773 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
774 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
775 xsre->target, 8, PropModeReplace,
776 (uchar *) sel.clip, strlen(sel.clip));
777 xev.property = xsre->property;
778 }
779
780 /* all done, send a notification to the listener */
781 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
782 fprintf(stderr, "Error sending SelectionNotify event\n");
783 }
784
785 void
786 xsetsel(char *str) {
787 /* register the selection for both the clipboard and the primary */
788 Atom clipboard;
789
790 free(sel.clip);
791 sel.clip = str;
792
793 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
794
795 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
796 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
797 }
798
799 void
800 brelease(XEvent *e) {
801 struct timeval now;
802
803 if(IS_SET(MODE_MOUSE)) {
804 mousereport(e);
805 return;
806 }
807
808 if(e->xbutton.button == Button2) {
809 selpaste();
810 } else if(e->xbutton.button == Button1) {
811 sel.mode = 0;
812 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
813 term.dirty[sel.ey] = 1;
814 if(sel.bx == sel.ex && sel.by == sel.ey) {
815 sel.bx = -1;
816 gettimeofday(&now, NULL);
817
818 if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
819 /* triple click on the line */
820 sel.b.x = sel.bx = 0;
821 sel.e.x = sel.ex = term.col;
822 sel.b.y = sel.e.y = sel.ey;
823 selcopy();
824 } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
825 /* double click to select word */
826 sel.bx = sel.ex;
827 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
828 term.line[sel.ey][sel.bx-1].c[0] != ' ') {
829 sel.bx--;
830 }
831 sel.b.x = sel.bx;
832 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
833 term.line[sel.ey][sel.ex+1].c[0] != ' ') {
834 sel.ex++;
835 }
836 sel.e.x = sel.ex;
837 sel.b.y = sel.e.y = sel.ey;
838 selcopy();
839 }
840 } else {
841 selcopy();
842 }
843 }
844
845 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
846 gettimeofday(&sel.tclick1, NULL);
847 }
848
849 void
850 bmotion(XEvent *e) {
851 int starty, endy, oldey, oldex;
852
853 if(IS_SET(MODE_MOUSE)) {
854 mousereport(e);
855 return;
856 }
857
858 if(sel.mode) {
859 oldey = sel.ey;
860 oldex = sel.ex;
861 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
862
863 if(oldey != sel.ey || oldex != sel.ex) {
864 starty = MIN(oldey, sel.ey);
865 endy = MAX(oldey, sel.ey);
866 tsetdirt(starty, endy);
867 }
868 }
869 }
870
871 void
872 die(const char *errstr, ...) {
873 va_list ap;
874
875 va_start(ap, errstr);
876 vfprintf(stderr, errstr, ap);
877 va_end(ap);
878 exit(EXIT_FAILURE);
879 }
880
881 void
882 execsh(void) {
883 char **args;
884 char *envshell = getenv("SHELL");
885 const struct passwd *pass = getpwuid(getuid());
886 char buf[sizeof(long) * 8 + 1];
887
888 unsetenv("COLUMNS");
889 unsetenv("LINES");
890 unsetenv("TERMCAP");
891
892 if(pass) {
893 setenv("LOGNAME", pass->pw_name, 1);
894 setenv("USER", pass->pw_name, 1);
895 setenv("SHELL", pass->pw_shell, 0);
896 setenv("HOME", pass->pw_dir, 0);
897 }
898
899 snprintf(buf, sizeof(buf), "%lu", xw.win);
900 setenv("WINDOWID", buf, 1);
901
902 signal(SIGCHLD, SIG_DFL);
903 signal(SIGHUP, SIG_DFL);
904 signal(SIGINT, SIG_DFL);
905 signal(SIGQUIT, SIG_DFL);
906 signal(SIGTERM, SIG_DFL);
907 signal(SIGALRM, SIG_DFL);
908
909 DEFAULT(envshell, SHELL);
910 putenv("TERM="TNAME);
911 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
912 execvp(args[0], args);
913 exit(EXIT_FAILURE);
914 }
915
916 void
917 sigchld(int a) {
918 int stat = 0;
919
920 if(waitpid(pid, &stat, 0) < 0)
921 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
922
923 if(WIFEXITED(stat)) {
924 exit(WEXITSTATUS(stat));
925 } else {
926 exit(EXIT_FAILURE);
927 }
928 }
929
930 void
931 ttynew(void) {
932 int m, s;
933 struct winsize w = {term.row, term.col, 0, 0};
934
935 /* seems to work fine on linux, openbsd and freebsd */
936 if(openpty(&m, &s, NULL, NULL, &w) < 0)
937 die("openpty failed: %s\n", SERRNO);
938
939 switch(pid = fork()) {
940 case -1:
941 die("fork failed\n");
942 break;
943 case 0:
944 setsid(); /* create a new process group */
945 dup2(s, STDIN_FILENO);
946 dup2(s, STDOUT_FILENO);
947 dup2(s, STDERR_FILENO);
948 if(ioctl(s, TIOCSCTTY, NULL) < 0)
949 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
950 close(s);
951 close(m);
952 execsh();
953 break;
954 default:
955 close(s);
956 cmdfd = m;
957 signal(SIGCHLD, sigchld);
958 if(opt_io) {
959 iofd = (!strcmp(opt_io, "-")) ?
960 STDOUT_FILENO :
961 open(opt_io, O_WRONLY | O_CREAT, 0666);
962 if(iofd < 0) {
963 fprintf(stderr, "Error opening %s:%s\n",
964 opt_io, strerror(errno));
965 }
966 }
967 }
968 }
969
970 void
971 dump(char c) {
972 static int col;
973
974 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
975 if(++col % 10 == 0)
976 fprintf(stderr, "\n");
977 }
978
979 void
980 ttyread(void) {
981 static char buf[BUFSIZ];
982 static int buflen = 0;
983 char *ptr;
984 char s[UTF_SIZ];
985 int charsize; /* size of utf8 char in bytes */
986 long utf8c;
987 int ret;
988
989 /* append read bytes to unprocessed bytes */
990 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
991 die("Couldn't read from shell: %s\n", SERRNO);
992
993 /* process every complete utf8 char */
994 buflen += ret;
995 ptr = buf;
996 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
997 charsize = utf8decode(ptr, &utf8c);
998 utf8encode(&utf8c, s);
999 tputc(s, charsize);
1000 ptr += charsize;
1001 buflen -= charsize;
1002 }
1003
1004 /* keep any uncomplete utf8 char for the next call */
1005 memmove(buf, ptr, buflen);
1006 }
1007
1008 void
1009 ttywrite(const char *s, size_t n) {
1010 if(write(cmdfd, s, n) == -1)
1011 die("write error on tty: %s\n", SERRNO);
1012 }
1013
1014 void
1015 ttyresize(void) {
1016 struct winsize w;
1017
1018 w.ws_row = term.row;
1019 w.ws_col = term.col;
1020 w.ws_xpixel = xw.tw;
1021 w.ws_ypixel = xw.th;
1022 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1023 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1024 }
1025
1026 void
1027 tsetdirt(int top, int bot) {
1028 int i;
1029
1030 LIMIT(top, 0, term.row-1);
1031 LIMIT(bot, 0, term.row-1);
1032
1033 for(i = top; i <= bot; i++)
1034 term.dirty[i] = 1;
1035 }
1036
1037 void
1038 tfulldirt(void) {
1039 tsetdirt(0, term.row-1);
1040 }
1041
1042 void
1043 tcursor(int mode) {
1044 static TCursor c;
1045
1046 if(mode == CURSOR_SAVE) {
1047 c = term.c;
1048 } else if(mode == CURSOR_LOAD) {
1049 term.c = c;
1050 tmoveto(c.x, c.y);
1051 }
1052 }
1053
1054 void
1055 treset(void) {
1056 uint i;
1057
1058 term.c = (TCursor){{
1059 .mode = ATTR_NULL,
1060 .fg = DefaultFG,
1061 .bg = DefaultBG
1062 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1063
1064 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1065 for(i = TAB; i < term.col; i += TAB)
1066 term.tabs[i] = 1;
1067 term.top = 0;
1068 term.bot = term.row - 1;
1069 term.mode = MODE_WRAP;
1070
1071 tclearregion(0, 0, term.col-1, term.row-1);
1072 }
1073
1074 void
1075 tnew(int col, int row) {
1076 /* set screen size */
1077 term.row = row;
1078 term.col = col;
1079 term.line = xmalloc(term.row * sizeof(Line));
1080 term.alt = xmalloc(term.row * sizeof(Line));
1081 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
1082 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
1083
1084 for(row = 0; row < term.row; row++) {
1085 term.line[row] = xmalloc(term.col * sizeof(Glyph));
1086 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
1087 term.dirty[row] = 0;
1088 }
1089 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1090 /* setup screen */
1091 treset();
1092 }
1093
1094 void
1095 tswapscreen(void) {
1096 Line *tmp = term.line;
1097
1098 term.line = term.alt;
1099 term.alt = tmp;
1100 term.mode ^= MODE_ALTSCREEN;
1101 tfulldirt();
1102 }
1103
1104 void
1105 tscrolldown(int orig, int n) {
1106 int i;
1107 Line temp;
1108
1109 LIMIT(n, 0, term.bot-orig+1);
1110
1111 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1112
1113 for(i = term.bot; i >= orig+n; i--) {
1114 temp = term.line[i];
1115 term.line[i] = term.line[i-n];
1116 term.line[i-n] = temp;
1117
1118 term.dirty[i] = 1;
1119 term.dirty[i-n] = 1;
1120 }
1121
1122 selscroll(orig, n);
1123 }
1124
1125 void
1126 tscrollup(int orig, int n) {
1127 int i;
1128 Line temp;
1129 LIMIT(n, 0, term.bot-orig+1);
1130
1131 tclearregion(0, orig, term.col-1, orig+n-1);
1132
1133 for(i = orig; i <= term.bot-n; i++) {
1134 temp = term.line[i];
1135 term.line[i] = term.line[i+n];
1136 term.line[i+n] = temp;
1137
1138 term.dirty[i] = 1;
1139 term.dirty[i+n] = 1;
1140 }
1141
1142 selscroll(orig, -n);
1143 }
1144
1145 void
1146 selscroll(int orig, int n) {
1147 if(sel.bx == -1)
1148 return;
1149
1150 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1151 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1152 sel.bx = -1;
1153 return;
1154 }
1155 if(sel.by < term.top) {
1156 sel.by = term.top;
1157 sel.bx = 0;
1158 }
1159 if(sel.ey > term.bot) {
1160 sel.ey = term.bot;
1161 sel.ex = term.col;
1162 }
1163 sel.b.y = sel.by, sel.b.x = sel.bx;
1164 sel.e.y = sel.ey, sel.e.x = sel.ex;
1165 }
1166 }
1167
1168 void
1169 tnewline(int first_col) {
1170 int y = term.c.y;
1171
1172 if(y == term.bot) {
1173 tscrollup(term.top, 1);
1174 } else {
1175 y++;
1176 }
1177 tmoveto(first_col ? 0 : term.c.x, y);
1178 }
1179
1180 void
1181 csiparse(void) {
1182 /* int noarg = 1; */
1183 char *p = csiescseq.buf;
1184
1185 csiescseq.narg = 0;
1186 if(*p == '?')
1187 csiescseq.priv = 1, p++;
1188
1189 while(p < csiescseq.buf+csiescseq.len) {
1190 while(isdigit(*p)) {
1191 csiescseq.arg[csiescseq.narg] *= 10;
1192 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1193 }
1194 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ) {
1195 csiescseq.narg++, p++;
1196 } else {
1197 csiescseq.mode = *p;
1198 csiescseq.narg++;
1199
1200 return;
1201 }
1202 }
1203 }
1204
1205 void
1206 tmoveto(int x, int y) {
1207 LIMIT(x, 0, term.col-1);
1208 LIMIT(y, 0, term.row-1);
1209 term.c.state &= ~CURSOR_WRAPNEXT;
1210 term.c.x = x;
1211 term.c.y = y;
1212 }
1213
1214 void
1215 tsetchar(char *c, Glyph *attr, int x, int y) {
1216 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1217 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1218 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1219 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1220 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1221 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1222 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1223 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1224 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1225 };
1226
1227 /*
1228 * The table is proudly stolen from rxvt.
1229 */
1230 if(attr->mode & ATTR_GFX) {
1231 if(c[0] >= 0x41 && c[0] <= 0x7e
1232 && vt100_0[c[0] - 0x41]) {
1233 c = vt100_0[c[0] - 0x41];
1234 }
1235 }
1236
1237 term.dirty[y] = 1;
1238 term.line[y][x] = *attr;
1239 memcpy(term.line[y][x].c, c, UTF_SIZ);
1240 term.line[y][x].state |= GLYPH_SET;
1241 }
1242
1243 void
1244 tclearregion(int x1, int y1, int x2, int y2) {
1245 int x, y, temp;
1246
1247 if(x1 > x2)
1248 temp = x1, x1 = x2, x2 = temp;
1249 if(y1 > y2)
1250 temp = y1, y1 = y2, y2 = temp;
1251
1252 LIMIT(x1, 0, term.col-1);
1253 LIMIT(x2, 0, term.col-1);
1254 LIMIT(y1, 0, term.row-1);
1255 LIMIT(y2, 0, term.row-1);
1256
1257 for(y = y1; y <= y2; y++) {
1258 term.dirty[y] = 1;
1259 for(x = x1; x <= x2; x++)
1260 term.line[y][x].state = 0;
1261 }
1262 }
1263
1264 void
1265 tdeletechar(int n) {
1266 int src = term.c.x + n;
1267 int dst = term.c.x;
1268 int size = term.col - src;
1269
1270 term.dirty[term.c.y] = 1;
1271
1272 if(src >= term.col) {
1273 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1274 return;
1275 }
1276
1277 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1278 size * sizeof(Glyph));
1279 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1280 }
1281
1282 void
1283 tinsertblank(int n) {
1284 int src = term.c.x;
1285 int dst = src + n;
1286 int size = term.col - dst;
1287
1288 term.dirty[term.c.y] = 1;
1289
1290 if(dst >= term.col) {
1291 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1292 return;
1293 }
1294
1295 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1296 size * sizeof(Glyph));
1297 tclearregion(src, term.c.y, dst - 1, term.c.y);
1298 }
1299
1300 void
1301 tinsertblankline(int n) {
1302 if(term.c.y < term.top || term.c.y > term.bot)
1303 return;
1304
1305 tscrolldown(term.c.y, n);
1306 }
1307
1308 void
1309 tdeleteline(int n) {
1310 if(term.c.y < term.top || term.c.y > term.bot)
1311 return;
1312
1313 tscrollup(term.c.y, n);
1314 }
1315
1316 void
1317 tsetattr(int *attr, int l) {
1318 int i;
1319
1320 for(i = 0; i < l; i++) {
1321 switch(attr[i]) {
1322 case 0:
1323 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1324 | ATTR_ITALIC | ATTR_BLINK);
1325 term.c.attr.fg = DefaultFG;
1326 term.c.attr.bg = DefaultBG;
1327 break;
1328 case 1:
1329 term.c.attr.mode |= ATTR_BOLD;
1330 break;
1331 case 3: /* enter standout (highlight) */
1332 term.c.attr.mode |= ATTR_ITALIC;
1333 break;
1334 case 4:
1335 term.c.attr.mode |= ATTR_UNDERLINE;
1336 break;
1337 case 5:
1338 term.c.attr.mode |= ATTR_BLINK;
1339 break;
1340 case 7:
1341 term.c.attr.mode |= ATTR_REVERSE;
1342 break;
1343 case 21:
1344 case 22:
1345 term.c.attr.mode &= ~ATTR_BOLD;
1346 break;
1347 case 23: /* leave standout (highlight) mode */
1348 term.c.attr.mode &= ~ATTR_ITALIC;
1349 break;
1350 case 24:
1351 term.c.attr.mode &= ~ATTR_UNDERLINE;
1352 break;
1353 case 25:
1354 term.c.attr.mode &= ~ATTR_BLINK;
1355 break;
1356 case 27:
1357 term.c.attr.mode &= ~ATTR_REVERSE;
1358 break;
1359 case 38:
1360 if(i + 2 < l && attr[i + 1] == 5) {
1361 i += 2;
1362 if(BETWEEN(attr[i], 0, 255)) {
1363 term.c.attr.fg = attr[i];
1364 } else {
1365 fprintf(stderr,
1366 "erresc: bad fgcolor %d\n",
1367 attr[i]);
1368 }
1369 } else {
1370 fprintf(stderr,
1371 "erresc(38): gfx attr %d unknown\n",
1372 attr[i]);
1373 }
1374 break;
1375 case 39:
1376 term.c.attr.fg = DefaultFG;
1377 break;
1378 case 48:
1379 if(i + 2 < l && attr[i + 1] == 5) {
1380 i += 2;
1381 if(BETWEEN(attr[i], 0, 255)) {
1382 term.c.attr.bg = attr[i];
1383 } else {
1384 fprintf(stderr,
1385 "erresc: bad bgcolor %d\n",
1386 attr[i]);
1387 }
1388 } else {
1389 fprintf(stderr,
1390 "erresc(48): gfx attr %d unknown\n",
1391 attr[i]);
1392 }
1393 break;
1394 case 49:
1395 term.c.attr.bg = DefaultBG;
1396 break;
1397 default:
1398 if(BETWEEN(attr[i], 30, 37)) {
1399 term.c.attr.fg = attr[i] - 30;
1400 } else if(BETWEEN(attr[i], 40, 47)) {
1401 term.c.attr.bg = attr[i] - 40;
1402 } else if(BETWEEN(attr[i], 90, 97)) {
1403 term.c.attr.fg = attr[i] - 90 + 8;
1404 } else if(BETWEEN(attr[i], 100, 107)) {
1405 term.c.attr.bg = attr[i] - 100 + 8;
1406 } else {
1407 fprintf(stderr,
1408 "erresc(default): gfx attr %d unknown\n",
1409 attr[i]), csidump();
1410 }
1411 break;
1412 }
1413 }
1414 }
1415
1416 void
1417 tsetscroll(int t, int b) {
1418 int temp;
1419
1420 LIMIT(t, 0, term.row-1);
1421 LIMIT(b, 0, term.row-1);
1422 if(t > b) {
1423 temp = t;
1424 t = b;
1425 b = temp;
1426 }
1427 term.top = t;
1428 term.bot = b;
1429 }
1430
1431 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1432
1433 void
1434 tsetmode(bool priv, bool set, int *args, int narg) {
1435 int *lim, mode;
1436
1437 for(lim = args + narg; args < lim; ++args) {
1438 if(priv) {
1439 switch(*args) {
1440 break;
1441 case 1: /* DECCKM -- Cursor key */
1442 MODBIT(term.mode, set, MODE_APPKEYPAD);
1443 break;
1444 case 5: /* DECSCNM -- Reverse video */
1445 mode = term.mode;
1446 MODBIT(term.mode, set, MODE_REVERSE);
1447 if(mode != term.mode)
1448 redraw();
1449 break;
1450 case 6: /* XXX: DECOM -- Origin */
1451 break;
1452 case 7: /* DECAWM -- Auto wrap */
1453 MODBIT(term.mode, set, MODE_WRAP);
1454 break;
1455 case 8: /* XXX: DECARM -- Auto repeat */
1456 break;
1457 case 0: /* Error (IGNORED) */
1458 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1459 break;
1460 case 25:
1461 MODBIT(term.c.state, !set, CURSOR_HIDE);
1462 break;
1463 case 1000: /* 1000,1002: enable xterm mouse report */
1464 MODBIT(term.mode, set, MODE_MOUSEBTN);
1465 break;
1466 case 1002:
1467 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1468 break;
1469 case 1049: /* = 1047 and 1048 */
1470 case 47:
1471 case 1047:
1472 if(IS_SET(MODE_ALTSCREEN))
1473 tclearregion(0, 0, term.col-1, term.row-1);
1474 if((set && !IS_SET(MODE_ALTSCREEN)) ||
1475 (!set && IS_SET(MODE_ALTSCREEN))) {
1476 tswapscreen();
1477 }
1478 if(*args != 1049)
1479 break;
1480 /* pass through */
1481 case 1048:
1482 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1483 break;
1484 default:
1485 /* case 2: DECANM -- ANSI/VT52 (NOT SUPPOURTED) */
1486 /* case 3: DECCOLM -- Column (NOT SUPPORTED) */
1487 /* case 4: DECSCLM -- Scroll (NOT SUPPORTED) */
1488 /* case 18: DECPFF -- Printer feed (NOT SUPPORTED) */
1489 /* case 19: DECPEX -- Printer extent (NOT SUPPORTED) */
1490 /* case 42: DECNRCM -- National characters (NOT SUPPORTED) */
1491 fprintf(stderr,
1492 "erresc: unknown private set/reset mode %d\n",
1493 *args);
1494 break;
1495 }
1496 } else {
1497 switch(*args) {
1498 case 0: /* Error (IGNORED) */
1499 break;
1500 case 2: /* KAM -- keyboard action */
1501 MODBIT(term.mode, set, MODE_KBDLOCK);
1502 break;
1503 case 4: /* IRM -- Insertion-replacement */
1504 MODBIT(term.mode, set, MODE_INSERT);
1505 break;
1506 case 12: /* XXX: SRM -- Send/Receive */
1507 break;
1508 case 20: /* LNM -- Linefeed/new line */
1509 MODBIT(term.mode, set, MODE_CRLF);
1510 break;
1511 default:
1512 fprintf(stderr,
1513 "erresc: unknown set/reset mode %d\n",
1514 *args);
1515 break;
1516 }
1517 }
1518 }
1519 }
1520 #undef MODBIT
1521
1522
1523 void
1524 csihandle(void) {
1525 switch(csiescseq.mode) {
1526 default:
1527 unknown:
1528 fprintf(stderr, "erresc: unknown csi ");
1529 csidump();
1530 /* die(""); */
1531 break;
1532 case '@': /* ICH -- Insert <n> blank char */
1533 DEFAULT(csiescseq.arg[0], 1);
1534 tinsertblank(csiescseq.arg[0]);
1535 break;
1536 case 'A': /* CUU -- Cursor <n> Up */
1537 case 'e':
1538 DEFAULT(csiescseq.arg[0], 1);
1539 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1540 break;
1541 case 'B': /* CUD -- Cursor <n> Down */
1542 DEFAULT(csiescseq.arg[0], 1);
1543 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1544 break;
1545 case 'c': /* DA -- Device Attributes */
1546 if(csiescseq.arg[0] == 0)
1547 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1548 break;
1549 case 'C': /* CUF -- Cursor <n> Forward */
1550 case 'a':
1551 DEFAULT(csiescseq.arg[0], 1);
1552 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1553 break;
1554 case 'D': /* CUB -- Cursor <n> Backward */
1555 DEFAULT(csiescseq.arg[0], 1);
1556 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1557 break;
1558 case 'E': /* CNL -- Cursor <n> Down and first col */
1559 DEFAULT(csiescseq.arg[0], 1);
1560 tmoveto(0, term.c.y+csiescseq.arg[0]);
1561 break;
1562 case 'F': /* CPL -- Cursor <n> Up and first col */
1563 DEFAULT(csiescseq.arg[0], 1);
1564 tmoveto(0, term.c.y-csiescseq.arg[0]);
1565 break;
1566 case 'g': /* TBC -- Tabulation clear */
1567 switch (csiescseq.arg[0]) {
1568 case 0: /* clear current tab stop */
1569 term.tabs[term.c.x] = 0;
1570 break;
1571 case 3: /* clear all the tabs */
1572 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1573 break;
1574 default:
1575 goto unknown;
1576 }
1577 break;
1578 case 'G': /* CHA -- Move to <col> */
1579 case '`': /* HPA */
1580 DEFAULT(csiescseq.arg[0], 1);
1581 tmoveto(csiescseq.arg[0]-1, term.c.y);
1582 break;
1583 case 'H': /* CUP -- Move to <row> <col> */
1584 case 'f': /* HVP */
1585 DEFAULT(csiescseq.arg[0], 1);
1586 DEFAULT(csiescseq.arg[1], 1);
1587 tmoveto(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1588 break;
1589 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1590 DEFAULT(csiescseq.arg[0], 1);
1591 while(csiescseq.arg[0]--)
1592 tputtab(1);
1593 break;
1594 case 'J': /* ED -- Clear screen */
1595 sel.bx = -1;
1596 switch(csiescseq.arg[0]) {
1597 case 0: /* below */
1598 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1599 if(term.c.y < term.row-1)
1600 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1601 break;
1602 case 1: /* above */
1603 if(term.c.y > 1)
1604 tclearregion(0, 0, term.col-1, term.c.y-1);
1605 tclearregion(0, term.c.y, term.c.x, term.c.y);
1606 break;
1607 case 2: /* all */
1608 tclearregion(0, 0, term.col-1, term.row-1);
1609 break;
1610 default:
1611 goto unknown;
1612 }
1613 break;
1614 case 'K': /* EL -- Clear line */
1615 switch(csiescseq.arg[0]) {
1616 case 0: /* right */
1617 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1618 break;
1619 case 1: /* left */
1620 tclearregion(0, term.c.y, term.c.x, term.c.y);
1621 break;
1622 case 2: /* all */
1623 tclearregion(0, term.c.y, term.col-1, term.c.y);
1624 break;
1625 }
1626 break;
1627 case 'S': /* SU -- Scroll <n> line up */
1628 DEFAULT(csiescseq.arg[0], 1);
1629 tscrollup(term.top, csiescseq.arg[0]);
1630 break;
1631 case 'T': /* SD -- Scroll <n> line down */
1632 DEFAULT(csiescseq.arg[0], 1);
1633 tscrolldown(term.top, csiescseq.arg[0]);
1634 break;
1635 case 'L': /* IL -- Insert <n> blank lines */
1636 DEFAULT(csiescseq.arg[0], 1);
1637 tinsertblankline(csiescseq.arg[0]);
1638 break;
1639 case 'l': /* RM -- Reset Mode */
1640 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1641 break;
1642 case 'M': /* DL -- Delete <n> lines */
1643 DEFAULT(csiescseq.arg[0], 1);
1644 tdeleteline(csiescseq.arg[0]);
1645 break;
1646 case 'X': /* ECH -- Erase <n> char */
1647 DEFAULT(csiescseq.arg[0], 1);
1648 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
1649 break;
1650 case 'P': /* DCH -- Delete <n> char */
1651 DEFAULT(csiescseq.arg[0], 1);
1652 tdeletechar(csiescseq.arg[0]);
1653 break;
1654 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1655 DEFAULT(csiescseq.arg[0], 1);
1656 while(csiescseq.arg[0]--)
1657 tputtab(0);
1658 break;
1659 case 'd': /* VPA -- Move to <row> */
1660 DEFAULT(csiescseq.arg[0], 1);
1661 tmoveto(term.c.x, csiescseq.arg[0]-1);
1662 break;
1663 case 'h': /* SM -- Set terminal mode */
1664 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1665 break;
1666 case 'm': /* SGR -- Terminal attribute (color) */
1667 tsetattr(csiescseq.arg, csiescseq.narg);
1668 break;
1669 case 'r': /* DECSTBM -- Set Scrolling Region */
1670 if(csiescseq.priv) {
1671 goto unknown;
1672 } else {
1673 DEFAULT(csiescseq.arg[0], 1);
1674 DEFAULT(csiescseq.arg[1], term.row);
1675 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1676 tmoveto(0, 0);
1677 }
1678 break;
1679 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1680 tcursor(CURSOR_SAVE);
1681 break;
1682 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1683 tcursor(CURSOR_LOAD);
1684 break;
1685 }
1686 }
1687
1688 void
1689 csidump(void) {
1690 int i;
1691 uint c;
1692
1693 printf("ESC[");
1694 for(i = 0; i < csiescseq.len; i++) {
1695 c = csiescseq.buf[i] & 0xff;
1696 if(isprint(c)) {
1697 putchar(c);
1698 } else if(c == '\n') {
1699 printf("(\\n)");
1700 } else if(c == '\r') {
1701 printf("(\\r)");
1702 } else if(c == 0x1b) {
1703 printf("(\\e)");
1704 } else {
1705 printf("(%02x)", c);
1706 }
1707 }
1708 putchar('\n');
1709 }
1710
1711 void
1712 csireset(void) {
1713 memset(&csiescseq, 0, sizeof(csiescseq));
1714 }
1715
1716 void
1717 strhandle(void) {
1718 char *p;
1719
1720 /*
1721 * TODO: make this being useful in case of color palette change.
1722 */
1723 strparse();
1724
1725 p = strescseq.buf;
1726
1727 switch(strescseq.type) {
1728 case ']': /* OSC -- Operating System Command */
1729 switch(p[0]) {
1730 case '0':
1731 case '1':
1732 case '2':
1733 /*
1734 * TODO: Handle special chars in string, like umlauts.
1735 */
1736 if(p[1] == ';') {
1737 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1738 }
1739 break;
1740 case ';':
1741 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1742 break;
1743 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1744 break;
1745 default:
1746 fprintf(stderr, "erresc: unknown str ");
1747 strdump();
1748 break;
1749 }
1750 break;
1751 case 'k': /* old title set compatibility */
1752 XStoreName(xw.dpy, xw.win, strescseq.buf);
1753 break;
1754 case 'P': /* DSC -- Device Control String */
1755 case '_': /* APC -- Application Program Command */
1756 case '^': /* PM -- Privacy Message */
1757 default:
1758 fprintf(stderr, "erresc: unknown str ");
1759 strdump();
1760 /* die(""); */
1761 break;
1762 }
1763 }
1764
1765 void
1766 strparse(void) {
1767 /*
1768 * TODO: Implement parsing like for CSI when required.
1769 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1770 */
1771 return;
1772 }
1773
1774 void
1775 strdump(void) {
1776 int i;
1777 uint c;
1778
1779 printf("ESC%c", strescseq.type);
1780 for(i = 0; i < strescseq.len; i++) {
1781 c = strescseq.buf[i] & 0xff;
1782 if(isprint(c)) {
1783 putchar(c);
1784 } else if(c == '\n') {
1785 printf("(\\n)");
1786 } else if(c == '\r') {
1787 printf("(\\r)");
1788 } else if(c == 0x1b) {
1789 printf("(\\e)");
1790 } else {
1791 printf("(%02x)", c);
1792 }
1793 }
1794 printf("ESC\\\n");
1795 }
1796
1797 void
1798 strreset(void) {
1799 memset(&strescseq, 0, sizeof(strescseq));
1800 }
1801
1802 void
1803 tputtab(bool forward) {
1804 uint x = term.c.x;
1805
1806 if(forward) {
1807 if(x == term.col)
1808 return;
1809 for(++x; x < term.col && !term.tabs[x]; ++x)
1810 /* nothing */ ;
1811 } else {
1812 if(x == 0)
1813 return;
1814 for(--x; x > 0 && !term.tabs[x]; --x)
1815 /* nothing */ ;
1816 }
1817 tmoveto(x, term.c.y);
1818 }
1819
1820 void
1821 tputc(char *c, int len) {
1822 uchar ascii = *c;
1823 bool control = ascii < '\x20' || ascii == 0177;
1824
1825 if(iofd != -1) {
1826 if (xwrite(iofd, c, len) < 0) {
1827 fprintf(stderr, "Error writting in %s:%s\n",
1828 opt_io, strerror(errno));
1829 close(iofd);
1830 iofd = -1;
1831 }
1832 }
1833 /*
1834 * STR sequences must be checked before of anything
1835 * because it can use some control codes as part of the sequence
1836 */
1837 if(term.esc & ESC_STR) {
1838 switch(ascii) {
1839 case '\033':
1840 term.esc = ESC_START | ESC_STR_END;
1841 break;
1842 case '\a': /* backwards compatibility to xterm */
1843 term.esc = 0;
1844 strhandle();
1845 break;
1846 default:
1847 strescseq.buf[strescseq.len++] = ascii;
1848 if(strescseq.len+1 >= STR_BUF_SIZ) {
1849 term.esc = 0;
1850 strhandle();
1851 }
1852 }
1853 return;
1854 }
1855 /*
1856 * Actions of control codes must be performed as soon they arrive
1857 * because they can be embedded inside a control sequence, and
1858 * they must not cause conflicts with sequences.
1859 */
1860 if(control) {
1861 switch(ascii) {
1862 case '\t': /* HT */
1863 tputtab(1);
1864 return;
1865 case '\b': /* BS */
1866 tmoveto(term.c.x-1, term.c.y);
1867 return;
1868 case '\r': /* CR */
1869 tmoveto(0, term.c.y);
1870 return;
1871 case '\f': /* LF */
1872 case '\v': /* VT */
1873 case '\n': /* LF */
1874 /* go to first col if the mode is set */
1875 tnewline(IS_SET(MODE_CRLF));
1876 return;
1877 case '\a': /* BEL */
1878 if(!(xw.state & WIN_FOCUSED))
1879 xseturgency(1);
1880 return;
1881 case '\033': /* ESC */
1882 csireset();
1883 term.esc = ESC_START;
1884 return;
1885 case '\016': /* SO */
1886 term.c.attr.mode |= ATTR_GFX;
1887 return;
1888 case '\017': /* SI */
1889 term.c.attr.mode &= ~ATTR_GFX;
1890 return;
1891 case '\032': /* SUB */
1892 case '\030': /* CAN */
1893 csireset();
1894 return;
1895 case '\005': /* ENQ (IGNORED) */
1896 case '\000': /* NUL (IGNORED) */
1897 case '\021': /* XON (IGNORED) */
1898 case '\023': /* XOFF (IGNORED) */
1899 case 0177: /* DEL (IGNORED) */
1900 return;
1901 }
1902 } else if(term.esc & ESC_START) {
1903 if(term.esc & ESC_CSI) {
1904 csiescseq.buf[csiescseq.len++] = ascii;
1905 if(BETWEEN(ascii, 0x40, 0x7E)
1906 || csiescseq.len >= ESC_BUF_SIZ) {
1907 term.esc = 0;
1908 csiparse(), csihandle();
1909 }
1910 } else if(term.esc & ESC_STR_END) {
1911 term.esc = 0;
1912 if(ascii == '\\')
1913 strhandle();
1914 } else if(term.esc & ESC_ALTCHARSET) {
1915 switch(ascii) {
1916 case '0': /* Line drawing set */
1917 term.c.attr.mode |= ATTR_GFX;
1918 break;
1919 case 'B': /* USASCII */
1920 term.c.attr.mode &= ~ATTR_GFX;
1921 break;
1922 case 'A': /* UK (IGNORED) */
1923 case '<': /* multinational charset (IGNORED) */
1924 case '5': /* Finnish (IGNORED) */
1925 case 'C': /* Finnish (IGNORED) */
1926 case 'K': /* German (IGNORED) */
1927 break;
1928 default:
1929 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1930 }
1931 term.esc = 0;
1932 } else if(term.esc & ESC_TEST) {
1933 if(ascii == '8') { /* DEC screen alignment test. */
1934 char E[UTF_SIZ] = "E";
1935 int x, y;
1936
1937 for(x = 0; x < term.col; ++x) {
1938 for(y = 0; y < term.row; ++y)
1939 tsetchar(E, &term.c.attr, x, y);
1940 }
1941 }
1942 term.esc = 0;
1943 } else {
1944 switch(ascii) {
1945 case '[':
1946 term.esc |= ESC_CSI;
1947 break;
1948 case '#':
1949 term.esc |= ESC_TEST;
1950 break;
1951 case 'P': /* DCS -- Device Control String */
1952 case '_': /* APC -- Application Program Command */
1953 case '^': /* PM -- Privacy Message */
1954 case ']': /* OSC -- Operating System Command */
1955 case 'k': /* old title set compatibility */
1956 strreset();
1957 strescseq.type = ascii;
1958 term.esc |= ESC_STR;
1959 break;
1960 case '(': /* set primary charset G0 */
1961 term.esc |= ESC_ALTCHARSET;
1962 break;
1963 case ')': /* set secondary charset G1 (IGNORED) */
1964 case '*': /* set tertiary charset G2 (IGNORED) */
1965 case '+': /* set quaternary charset G3 (IGNORED) */
1966 term.esc = 0;
1967 break;
1968 case 'D': /* IND -- Linefeed */
1969 if(term.c.y == term.bot) {
1970 tscrollup(term.top, 1);
1971 } else {
1972 tmoveto(term.c.x, term.c.y+1);
1973 }
1974 term.esc = 0;
1975 break;
1976 case 'E': /* NEL -- Next line */
1977 tnewline(1); /* always go to first col */
1978 term.esc = 0;
1979 break;
1980 case 'H': /* HTS -- Horizontal tab stop */
1981 term.tabs[term.c.x] = 1;
1982 term.esc = 0;
1983 break;
1984 case 'M': /* RI -- Reverse index */
1985 if(term.c.y == term.top) {
1986 tscrolldown(term.top, 1);
1987 } else {
1988 tmoveto(term.c.x, term.c.y-1);
1989 }
1990 term.esc = 0;
1991 break;
1992 case 'Z': /* DECID -- Identify Terminal */
1993 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1994 term.esc = 0;
1995 break;
1996 case 'c': /* RIS -- Reset to inital state */
1997 treset();
1998 term.esc = 0;
1999 xresettitle();
2000 break;
2001 case '=': /* DECPAM -- Application keypad */
2002 term.mode |= MODE_APPKEYPAD;
2003 term.esc = 0;
2004 break;
2005 case '>': /* DECPNM -- Normal keypad */
2006 term.mode &= ~MODE_APPKEYPAD;
2007 term.esc = 0;
2008 break;
2009 case '7': /* DECSC -- Save Cursor */
2010 tcursor(CURSOR_SAVE);
2011 term.esc = 0;
2012 break;
2013 case '8': /* DECRC -- Restore Cursor */
2014 tcursor(CURSOR_LOAD);
2015 term.esc = 0;
2016 break;
2017 case '\\': /* ST -- Stop */
2018 term.esc = 0;
2019 break;
2020 default:
2021 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2022 (uchar) ascii, isprint(ascii)? ascii:'.');
2023 term.esc = 0;
2024 }
2025 }
2026 /*
2027 * All characters which forms part of a sequence are not
2028 * printed
2029 */
2030 return;
2031 }
2032 /*
2033 * Display control codes only if we are in graphic mode
2034 */
2035 if(control && !(term.c.attr.mode & ATTR_GFX))
2036 return;
2037 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2038 sel.bx = -1;
2039 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2040 tnewline(1); /* always go to first col */
2041 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2042 if(term.c.x+1 < term.col)
2043 tmoveto(term.c.x+1, term.c.y);
2044 else
2045 term.c.state |= CURSOR_WRAPNEXT;
2046 }
2047
2048 int
2049 tresize(int col, int row) {
2050 int i, x;
2051 int minrow = MIN(row, term.row);
2052 int mincol = MIN(col, term.col);
2053 int slide = term.c.y - row + 1;
2054 bool *bp;
2055
2056 if(col < 1 || row < 1)
2057 return 0;
2058
2059 /* free unneeded rows */
2060 i = 0;
2061 if(slide > 0) {
2062 /* slide screen to keep cursor where we expect it -
2063 * tscrollup would work here, but we can optimize to
2064 * memmove because we're freeing the earlier lines */
2065 for(/* i = 0 */; i < slide; i++) {
2066 free(term.line[i]);
2067 free(term.alt[i]);
2068 }
2069 memmove(term.line, term.line + slide, row * sizeof(Line));
2070 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2071 }
2072 for(i += row; i < term.row; i++) {
2073 free(term.line[i]);
2074 free(term.alt[i]);
2075 }
2076
2077 /* resize to new height */
2078 term.line = xrealloc(term.line, row * sizeof(Line));
2079 term.alt = xrealloc(term.alt, row * sizeof(Line));
2080 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2081 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2082
2083 /* resize each row to new width, zero-pad if needed */
2084 for(i = 0; i < minrow; i++) {
2085 term.dirty[i] = 1;
2086 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2087 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2088 for(x = mincol; x < col; x++) {
2089 term.line[i][x].state = 0;
2090 term.alt[i][x].state = 0;
2091 }
2092 }
2093
2094 /* allocate any new rows */
2095 for(/* i == minrow */; i < row; i++) {
2096 term.dirty[i] = 1;
2097 term.line[i] = xcalloc(col, sizeof(Glyph));
2098 term.alt [i] = xcalloc(col, sizeof(Glyph));
2099 }
2100 if(col > term.col) {
2101 bp = term.tabs + term.col;
2102
2103 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2104 while(--bp > term.tabs && !*bp)
2105 /* nothing */ ;
2106 for(bp += TAB; bp < term.tabs + col; bp += TAB)
2107 *bp = 1;
2108 }
2109 /* update terminal size */
2110 term.col = col, term.row = row;
2111 /* make use of the LIMIT in tmoveto */
2112 tmoveto(term.c.x, term.c.y);
2113 /* reset scrolling region */
2114 tsetscroll(0, row-1);
2115
2116 return (slide > 0);
2117 }
2118
2119 void
2120 xresize(int col, int row) {
2121 xw.tw = MAX(1, 2*BORDER + col * xw.cw);
2122 xw.th = MAX(1, 2*BORDER + row * xw.ch);
2123
2124 XftDrawChange(xw.xft_draw, xw.buf);
2125 }
2126
2127 void
2128 xloadcols(void) {
2129 int i, r, g, b;
2130 XRenderColor xft_color = { .alpha = 0 };
2131
2132 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2133 for(i = 0; i < LEN(colorname); i++) {
2134 if(!colorname[i])
2135 continue;
2136 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.xft_col[i])) {
2137 die("Could not allocate color '%s'\n", colorname[i]);
2138 }
2139 }
2140
2141 /* load colors [16-255] ; same colors as xterm */
2142 for(i = 16, r = 0; r < 6; r++) {
2143 for(g = 0; g < 6; g++) {
2144 for(b = 0; b < 6; b++) {
2145 xft_color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
2146 xft_color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
2147 xft_color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
2148 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &xft_color, &dc.xft_col[i])) {
2149 die("Could not allocate color %d\n", i);
2150 }
2151 i++;
2152 }
2153 }
2154 }
2155
2156 for(r = 0; r < 24; r++, i++) {
2157 xft_color.red = xft_color.green = xft_color.blue = 0x0808 + 0x0a0a * r;
2158 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &xft_color,
2159 &dc.xft_col[i])) {
2160 die("Could not allocate color %d\n", i);
2161 }
2162 }
2163 }
2164
2165 void
2166 xtermclear(int col1, int row1, int col2, int row2) {
2167 XftDrawRect(xw.xft_draw,
2168 &dc.xft_col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG],
2169 BORDER + col1 * xw.cw,
2170 BORDER + row1 * xw.ch,
2171 (col2-col1+1) * xw.cw,
2172 (row2-row1+1) * xw.ch);
2173 }
2174
2175 /*
2176 * Absolute coordinates.
2177 */
2178 void
2179 xclear(int x1, int y1, int x2, int y2) {
2180 XftDrawRect(xw.xft_draw,
2181 &dc.xft_col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG],
2182 x1, y1, x2-x1, y2-y1);
2183 }
2184
2185 void
2186 xhints(void) {
2187 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
2188 XWMHints wm = {.flags = InputHint, .input = 1};
2189 XSizeHints *sizeh = NULL;
2190
2191 sizeh = XAllocSizeHints();
2192 if(xw.isfixed == False) {
2193 sizeh->flags = PSize | PResizeInc | PBaseSize;
2194 sizeh->height = xw.h;
2195 sizeh->width = xw.w;
2196 sizeh->height_inc = xw.ch;
2197 sizeh->width_inc = xw.cw;
2198 sizeh->base_height = 2*BORDER;
2199 sizeh->base_width = 2*BORDER;
2200 } else {
2201 sizeh->flags = PMaxSize | PMinSize;
2202 sizeh->min_width = sizeh->max_width = xw.fw;
2203 sizeh->min_height = sizeh->max_height = xw.fh;
2204 }
2205
2206 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2207 XFree(sizeh);
2208 }
2209
2210 void
2211 xinitfont(Font *f, char *fontstr) {
2212 FcPattern *pattern, *match;
2213 FcResult result;
2214
2215 pattern = FcNameParse((FcChar8 *)fontstr);
2216 if(!pattern)
2217 die("st: can't open font %s\n", fontstr);
2218
2219 match = XftFontMatch(xw.dpy, xw.scr, pattern, &result);
2220 FcPatternDestroy(pattern);
2221 if(!match)
2222 die("st: can't open font %s\n", fontstr);
2223 if(!(f->xft_set = XftFontOpenPattern(xw.dpy, match))) {
2224 FcPatternDestroy(match);
2225 die("st: can't open font %s.\n", fontstr);
2226 }
2227
2228 f->ascent = f->xft_set->ascent;
2229 f->descent = f->xft_set->descent;
2230 f->lbearing = 0;
2231 f->rbearing = f->xft_set->max_advance_width;
2232
2233 f->height = f->xft_set->height;
2234 f->width = f->lbearing + f->rbearing;
2235 }
2236
2237 void
2238 initfonts(char *fontstr) {
2239 char *fstr;
2240
2241 xinitfont(&dc.font, fontstr);
2242 xw.cw = dc.font.width;
2243 xw.ch = dc.font.height;
2244
2245 fstr = smstrcat(fontstr, ":weight=bold", NULL);
2246 xinitfont(&dc.bfont, fstr);
2247 free(fstr);
2248
2249 fstr = smstrcat(fontstr, ":slant=italic,oblique", NULL);
2250 xinitfont(&dc.ifont, fstr);
2251 free(fstr);
2252
2253 fstr = smstrcat(fontstr, ":weight=bold:slant=italic,oblique", NULL);
2254 xinitfont(&dc.ibfont, fstr);
2255 free(fstr);
2256 }
2257
2258 void
2259 xinit(void) {
2260 XSetWindowAttributes attrs;
2261 Cursor cursor;
2262 Window parent;
2263 int sw, sh, major, minor;
2264
2265 if(!(xw.dpy = XOpenDisplay(NULL)))
2266 die("Can't open display\n");
2267 xw.scr = XDefaultScreen(xw.dpy);
2268 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2269
2270 /* font */
2271 initfonts((opt_font != NULL)? opt_font : FONT);
2272
2273 /* colors */
2274 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2275 xloadcols();
2276
2277 /* adjust fixed window geometry */
2278 if(xw.isfixed) {
2279 sw = DisplayWidth(xw.dpy, xw.scr);
2280 sh = DisplayHeight(xw.dpy, xw.scr);
2281 if(xw.fx < 0)
2282 xw.fx = sw + xw.fx - xw.fw - 1;
2283 if(xw.fy < 0)
2284 xw.fy = sh + xw.fy - xw.fh - 1;
2285
2286 xw.h = xw.fh;
2287 xw.w = xw.fw;
2288 } else {
2289 /* window - default size */
2290 xw.h = 2*BORDER + term.row * xw.ch;
2291 xw.w = 2*BORDER + term.col * xw.cw;
2292 xw.fx = 0;
2293 xw.fy = 0;
2294 }
2295
2296 attrs.background_pixel = dc.xft_col[DefaultBG].pixel;
2297 attrs.border_pixel = dc.xft_col[DefaultBG].pixel;
2298 attrs.bit_gravity = NorthWestGravity;
2299 attrs.event_mask = FocusChangeMask | KeyPressMask
2300 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2301 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2302 attrs.colormap = xw.cmap;
2303
2304 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
2305 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2306 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2307 xw.vis,
2308 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2309 | CWColormap,
2310 &attrs);
2311
2312 /* double buffering */
2313 if(!XdbeQueryExtension(xw.dpy, &major, &minor))
2314 die("Xdbe extension is not present\n");
2315 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
2316
2317 /* Xft rendering context */
2318 xw.xft_draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2319
2320 /* input methods */
2321 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
2322 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2323 | XIMStatusNothing, XNClientWindow, xw.win,
2324 XNFocusWindow, xw.win, NULL);
2325 /* gc */
2326 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
2327
2328 /* white cursor, black outline */
2329 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2330 XDefineCursor(xw.dpy, xw.win, cursor);
2331 XRecolorCursor(xw.dpy, cursor,
2332 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2333 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2334
2335 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2336 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2337 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2338
2339 xresettitle();
2340 XMapWindow(xw.dpy, xw.win);
2341 xhints();
2342 XSync(xw.dpy, 0);
2343 }
2344
2345 void
2346 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2347 int winx = BORDER + x * xw.cw, winy = BORDER + y * xw.ch,
2348 width = charlen * xw.cw;
2349 Font *font = &dc.font;
2350 XGlyphInfo extents;
2351 XftColor *fg = &dc.xft_col[base.fg], *bg = &dc.xft_col[base.bg],
2352 *temp, revfg, revbg;
2353 XRenderColor colfg, colbg;
2354
2355 if(base.mode & ATTR_REVERSE)
2356 temp = fg, fg = bg, bg = temp;
2357
2358 if(base.mode & ATTR_BOLD) {
2359 if(BETWEEN(base.fg, 0, 7)) {
2360 /* basic system colors */
2361 fg = &dc.xft_col[base.fg + 8];
2362 } else if(BETWEEN(base.fg, 16, 195)) {
2363 /* 256 colors */
2364 fg = &dc.xft_col[base.fg + 36];
2365 } else if(BETWEEN(base.fg, 232, 251)) {
2366 /* greyscale */
2367 fg = &dc.xft_col[base.fg + 4];
2368 }
2369 /*
2370 * Those ranges will not be brightened:
2371 * 8 - 15 – bright system colors
2372 * 196 - 231 – highest 256 color cube
2373 * 252 - 255 – brightest colors in greyscale
2374 */
2375 font = &dc.bfont;
2376 }
2377
2378 if(base.mode & ATTR_ITALIC)
2379 font = &dc.ifont;
2380 if(base.mode & (ATTR_ITALIC|ATTR_ITALIC))
2381 font = &dc.ibfont;
2382
2383 if(IS_SET(MODE_REVERSE)) {
2384 if(fg == &dc.xft_col[DefaultFG]) {
2385 fg = &dc.xft_col[DefaultBG];
2386 } else {
2387 colfg.red = ~fg->color.red;
2388 colfg.green = ~fg->color.green;
2389 colfg.blue = ~fg->color.blue;
2390 colfg.alpha = fg->color.alpha;
2391 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2392 fg = &revfg;
2393 }
2394
2395 if(bg == &dc.xft_col[DefaultBG]) {
2396 bg = &dc.xft_col[DefaultFG];
2397 } else {
2398 colbg.red = ~bg->color.red;
2399 colbg.green = ~bg->color.green;
2400 colbg.blue = ~bg->color.blue;
2401 colbg.alpha = bg->color.alpha;
2402 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2403 bg = &revbg;
2404 }
2405 }
2406
2407 XftTextExtentsUtf8(xw.dpy, font->xft_set, (FcChar8 *)s, bytelen,
2408 &extents);
2409 width = extents.xOff;
2410
2411 /* Intelligent cleaning up of the borders. */
2412 if(x == 0) {
2413 xclear(0, (y == 0)? 0 : winy, BORDER,
2414 winy + xw.ch + (y == term.row-1)? xw.h : 0);
2415 }
2416 if(x + charlen >= term.col-1) {
2417 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2418 (y == term.row-1)? xw.h : (winy + xw.ch));
2419 }
2420 if(y == 0)
2421 xclear(winx, 0, winx + width, BORDER);
2422 if(y == term.row-1)
2423 xclear(winx, winy + xw.ch, winx + width, xw.h);
2424
2425 XftDrawRect(xw.xft_draw, bg, winx, winy, width, xw.ch);
2426 XftDrawStringUtf8(xw.xft_draw, fg, font->xft_set, winx,
2427 winy + font->ascent, (FcChar8 *)s, bytelen);
2428
2429 if(base.mode & ATTR_UNDERLINE) {
2430 XftDrawRect(xw.xft_draw, fg, winx, winy + font->ascent + 1,
2431 width, 1);
2432 }
2433 }
2434
2435 void
2436 xdrawcursor(void) {
2437 static int oldx = 0, oldy = 0;
2438 int sl;
2439 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
2440
2441 LIMIT(oldx, 0, term.col-1);
2442 LIMIT(oldy, 0, term.row-1);
2443
2444 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2445 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2446
2447 /* remove the old cursor */
2448 if(term.line[oldy][oldx].state & GLYPH_SET) {
2449 sl = utf8size(term.line[oldy][oldx].c);
2450 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2451 oldy, 1, sl);
2452 } else {
2453 xtermclear(oldx, oldy, oldx, oldy);
2454 }
2455
2456 /* draw the new one */
2457 if(!(term.c.state & CURSOR_HIDE)) {
2458 if(!(xw.state & WIN_FOCUSED))
2459 g.bg = DefaultUCS;
2460
2461 if(IS_SET(MODE_REVERSE))
2462 g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
2463
2464 sl = utf8size(g.c);
2465 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2466 oldx = term.c.x, oldy = term.c.y;
2467 }
2468 }
2469
2470 void
2471 xresettitle(void) {
2472 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
2473 }
2474
2475 void
2476 redraw(void) {
2477 struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
2478
2479 tfulldirt();
2480 draw();
2481 XSync(xw.dpy, False); /* necessary for a good tput flash */
2482 nanosleep(&tv, NULL);
2483 }
2484
2485 void
2486 draw(void) {
2487 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2488
2489 drawregion(0, 0, term.col, term.row);
2490 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2491 }
2492
2493 void
2494 drawregion(int x1, int y1, int x2, int y2) {
2495 int ic, ib, x, y, ox, sl;
2496 Glyph base, new;
2497 char buf[DRAW_BUF_SIZ];
2498 bool ena_sel = sel.bx != -1, alt = IS_SET(MODE_ALTSCREEN);
2499
2500 if((sel.alt && !alt) || (!sel.alt && alt))
2501 ena_sel = 0;
2502 if(!(xw.state & WIN_VISIBLE))
2503 return;
2504
2505 for(y = y1; y < y2; y++) {
2506 if(!term.dirty[y])
2507 continue;
2508
2509 xtermclear(0, y, term.col, y);
2510 term.dirty[y] = 0;
2511 base = term.line[y][0];
2512 ic = ib = ox = 0;
2513 for(x = x1; x < x2; x++) {
2514 new = term.line[y][x];
2515 if(ena_sel && *(new.c) && selected(x, y))
2516 new.mode ^= ATTR_REVERSE;
2517 if(ib > 0 && (!(new.state & GLYPH_SET)
2518 || ATTRCMP(base, new)
2519 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2520 xdraws(buf, base, ox, y, ic, ib);
2521 ic = ib = 0;
2522 }
2523 if(new.state & GLYPH_SET) {
2524 if(ib == 0) {
2525 ox = x;
2526 base = new;
2527 }
2528 sl = utf8size(new.c);
2529 memcpy(buf+ib, new.c, sl);
2530 ib += sl;
2531 ++ic;
2532 }
2533 }
2534 if(ib > 0)
2535 xdraws(buf, base, ox, y, ic, ib);
2536 }
2537 xdrawcursor();
2538 }
2539
2540 void
2541 expose(XEvent *ev) {
2542 XExposeEvent *e = &ev->xexpose;
2543
2544 if(xw.state & WIN_REDRAW) {
2545 if(!e->count)
2546 xw.state &= ~WIN_REDRAW;
2547 }
2548 }
2549
2550 void
2551 visibility(XEvent *ev) {
2552 XVisibilityEvent *e = &ev->xvisibility;
2553
2554 if(e->state == VisibilityFullyObscured) {
2555 xw.state &= ~WIN_VISIBLE;
2556 } else if(!(xw.state & WIN_VISIBLE)) {
2557 /* need a full redraw for next Expose, not just a buf copy */
2558 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2559 }
2560 }
2561
2562 void
2563 unmap(XEvent *ev) {
2564 xw.state &= ~WIN_VISIBLE;
2565 }
2566
2567 void
2568 xseturgency(int add) {
2569 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2570
2571 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2572 XSetWMHints(xw.dpy, xw.win, h);
2573 XFree(h);
2574 }
2575
2576 void
2577 focus(XEvent *ev) {
2578 if(ev->type == FocusIn) {
2579 xw.state |= WIN_FOCUSED;
2580 xseturgency(0);
2581 } else {
2582 xw.state &= ~WIN_FOCUSED;
2583 }
2584 }
2585
2586 char*
2587 kmap(KeySym k, uint state) {
2588 int i;
2589 uint mask;
2590
2591 state &= ~Mod2Mask;
2592 for(i = 0; i < LEN(key); i++) {
2593 mask = key[i].mask;
2594
2595 if(key[i].k == k && ((state & mask) == mask
2596 || (mask == XK_NO_MOD && !state))) {
2597 return (char*)key[i].s;
2598 }
2599 }
2600 return NULL;
2601 }
2602
2603 void
2604 kpress(XEvent *ev) {
2605 XKeyEvent *e = &ev->xkey;
2606 KeySym ksym;
2607 char buf[32];
2608 char *customkey;
2609 int len;
2610 int meta;
2611 int shift;
2612 Status status;
2613
2614 if (IS_SET(MODE_KBDLOCK))
2615 return;
2616
2617 meta = e->state & Mod1Mask;
2618 shift = e->state & ShiftMask;
2619 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
2620
2621 /* 1. custom keys from config.h */
2622 if((customkey = kmap(ksym, e->state))) {
2623 ttywrite(customkey, strlen(customkey));
2624 /* 2. hardcoded (overrides X lookup) */
2625 } else {
2626 switch(ksym) {
2627 case XK_Up:
2628 case XK_Down:
2629 case XK_Left:
2630 case XK_Right:
2631 /* XXX: shift up/down doesn't work */
2632 sprintf(buf, "\033%c%c",
2633 IS_SET(MODE_APPKEYPAD) ? 'O' : '[',
2634 (shift ? "dacb":"DACB")[ksym - XK_Left]);
2635 ttywrite(buf, 3);
2636 break;
2637 case XK_Insert:
2638 if(shift)
2639 selpaste();
2640 break;
2641 case XK_Return:
2642 if(IS_SET(MODE_CRLF)) {
2643 ttywrite("\r\n", 2);
2644 } else {
2645 ttywrite("\r", 1);
2646 }
2647 break;
2648 /* 3. X lookup */
2649 default:
2650 if(len > 0) {
2651 if(meta && len == 1)
2652 ttywrite("\033", 1);
2653 ttywrite(buf, len);
2654 }
2655 break;
2656 }
2657 }
2658 }
2659
2660 void
2661 cmessage(XEvent *e) {
2662 /* See xembed specs
2663 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2664 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2665 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2666 xw.state |= WIN_FOCUSED;
2667 xseturgency(0);
2668 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2669 xw.state &= ~WIN_FOCUSED;
2670 }
2671 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
2672 /* Send SIGHUP to shell */
2673 kill(pid, SIGHUP);
2674 exit(EXIT_SUCCESS);
2675 }
2676 }
2677
2678 void
2679 resize(XEvent *e) {
2680 int col, row;
2681
2682 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2683 return;
2684
2685 xw.w = e->xconfigure.width;
2686 xw.h = e->xconfigure.height;
2687 col = (xw.w - 2*BORDER) / xw.cw;
2688 row = (xw.h - 2*BORDER) / xw.ch;
2689 if(col == term.col && row == term.row)
2690 return;
2691
2692 tresize(col, row);
2693 xresize(col, row);
2694 ttyresize();
2695 }
2696
2697 void
2698 run(void) {
2699 XEvent ev;
2700 fd_set rfd;
2701 int xfd = XConnectionNumber(xw.dpy), i;
2702 struct timeval drawtimeout, *tv = NULL;
2703
2704 for(i = 0;; i++) {
2705 FD_ZERO(&rfd);
2706 FD_SET(cmdfd, &rfd);
2707 FD_SET(xfd, &rfd);
2708 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
2709 if(errno == EINTR)
2710 continue;
2711 die("select failed: %s\n", SERRNO);
2712 }
2713
2714 /*
2715 * Stop after a certain number of reads so the user does not
2716 * feel like the system is stuttering.
2717 */
2718 if(i < 1000 && FD_ISSET(cmdfd, &rfd)) {
2719 ttyread();
2720
2721 /*
2722 * Just wait a bit so it isn't disturbing the
2723 * user and the system is able to write something.
2724 */
2725 drawtimeout.tv_sec = 0;
2726 drawtimeout.tv_usec = 5;
2727 tv = &drawtimeout;
2728 continue;
2729 }
2730 i = 0;
2731 tv = NULL;
2732
2733 while(XPending(xw.dpy)) {
2734 XNextEvent(xw.dpy, &ev);
2735 if(XFilterEvent(&ev, xw.win))
2736 continue;
2737 if(handler[ev.type])
2738 (handler[ev.type])(&ev);
2739 }
2740
2741 draw();
2742 XFlush(xw.dpy);
2743 }
2744 }
2745
2746 int
2747 main(int argc, char *argv[]) {
2748 int i, bitm, xr, yr;
2749 uint wr, hr;
2750
2751 xw.fw = xw.fh = xw.fx = xw.fy = 0;
2752 xw.isfixed = False;
2753
2754 for(i = 1; i < argc; i++) {
2755 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2756 case 'c':
2757 if(++i < argc)
2758 opt_class = argv[i];
2759 break;
2760 case 'e':
2761 /* eat every remaining arguments */
2762 if(++i < argc)
2763 opt_cmd = &argv[i];
2764 goto run;
2765 case 'f':
2766 if(++i < argc)
2767 opt_font = argv[i];
2768 break;
2769 case 'g':
2770 if(++i >= argc)
2771 break;
2772
2773 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
2774 if(bitm & XValue)
2775 xw.fx = xr;
2776 if(bitm & YValue)
2777 xw.fy = yr;
2778 if(bitm & WidthValue)
2779 xw.fw = (int)wr;
2780 if(bitm & HeightValue)
2781 xw.fh = (int)hr;
2782 if(bitm & XNegative && xw.fx == 0)
2783 xw.fx = -1;
2784 if(bitm & XNegative && xw.fy == 0)
2785 xw.fy = -1;
2786
2787 if(xw.fh != 0 && xw.fw != 0)
2788 xw.isfixed = True;
2789 break;
2790 case 'o':
2791 if(++i < argc)
2792 opt_io = argv[i];
2793 break;
2794 case 't':
2795 if(++i < argc)
2796 opt_title = argv[i];
2797 break;
2798 case 'v':
2799 default:
2800 die(USAGE);
2801 case 'w':
2802 if(++i < argc)
2803 opt_embed = argv[i];
2804 break;
2805 }
2806 }
2807
2808 run:
2809 setlocale(LC_CTYPE, "");
2810 tnew(80, 24);
2811 xinit();
2812 ttynew();
2813 selinit();
2814 run();
2815 return 0;
2816 }
2817