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3cd78310a5985d04386099d255c1ef3de54f9311
[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;
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 || !(gp->state & GLYPH_SET)) {
698 continue;
699 }
700 size = utf8size(gp->c);
701 memcpy(ptr, gp->c, size);
702 ptr += size;
703 }
704 /* \n at the end of every selected line except for the last one */
705 if(is_selected && y < sel.e.y)
706 *ptr++ = '\n';
707 }
708 *ptr = 0;
709 }
710 sel.alt = IS_SET(MODE_ALTSCREEN);
711 xsetsel(str);
712 }
713
714 void
715 selnotify(XEvent *e) {
716 ulong nitems, ofs, rem;
717 int format;
718 uchar *data;
719 Atom type;
720
721 ofs = 0;
722 do {
723 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
724 False, AnyPropertyType, &type, &format,
725 &nitems, &rem, &data)) {
726 fprintf(stderr, "Clipboard allocation failed\n");
727 return;
728 }
729 ttywrite((const char *) data, nitems * format / 8);
730 XFree(data);
731 /* number of 32-bit chunks returned */
732 ofs += nitems * format / 32;
733 } while(rem > 0);
734 }
735
736 void
737 selpaste(void) {
738 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
739 xw.win, CurrentTime);
740 }
741
742 void selclear(XEvent *e) {
743 if(sel.bx == -1)
744 return;
745 sel.bx = -1;
746 tsetdirt(sel.b.y, sel.e.y);
747 }
748
749 void
750 selrequest(XEvent *e) {
751 XSelectionRequestEvent *xsre;
752 XSelectionEvent xev;
753 Atom xa_targets, string;
754
755 xsre = (XSelectionRequestEvent *) e;
756 xev.type = SelectionNotify;
757 xev.requestor = xsre->requestor;
758 xev.selection = xsre->selection;
759 xev.target = xsre->target;
760 xev.time = xsre->time;
761 /* reject */
762 xev.property = None;
763
764 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
765 if(xsre->target == xa_targets) {
766 /* respond with the supported type */
767 string = sel.xtarget;
768 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
769 XA_ATOM, 32, PropModeReplace,
770 (uchar *) &string, 1);
771 xev.property = xsre->property;
772 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
773 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
774 xsre->target, 8, PropModeReplace,
775 (uchar *) sel.clip, strlen(sel.clip));
776 xev.property = xsre->property;
777 }
778
779 /* all done, send a notification to the listener */
780 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
781 fprintf(stderr, "Error sending SelectionNotify event\n");
782 }
783
784 void
785 xsetsel(char *str) {
786 /* register the selection for both the clipboard and the primary */
787 Atom clipboard;
788
789 free(sel.clip);
790 sel.clip = str;
791
792 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
793
794 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
795 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
796 }
797
798 void
799 brelease(XEvent *e) {
800 struct timeval now;
801
802 if(IS_SET(MODE_MOUSE)) {
803 mousereport(e);
804 return;
805 }
806
807 if(e->xbutton.button == Button2) {
808 selpaste();
809 } else if(e->xbutton.button == Button1) {
810 sel.mode = 0;
811 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
812 term.dirty[sel.ey] = 1;
813 if(sel.bx == sel.ex && sel.by == sel.ey) {
814 sel.bx = -1;
815 gettimeofday(&now, NULL);
816
817 if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
818 /* triple click on the line */
819 sel.b.x = sel.bx = 0;
820 sel.e.x = sel.ex = term.col;
821 sel.b.y = sel.e.y = sel.ey;
822 selcopy();
823 } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
824 /* double click to select word */
825 sel.bx = sel.ex;
826 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
827 term.line[sel.ey][sel.bx-1].c[0] != ' ') {
828 sel.bx--;
829 }
830 sel.b.x = sel.bx;
831 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
832 term.line[sel.ey][sel.ex+1].c[0] != ' ') {
833 sel.ex++;
834 }
835 sel.e.x = sel.ex;
836 sel.b.y = sel.e.y = sel.ey;
837 selcopy();
838 }
839 } else {
840 selcopy();
841 }
842 }
843
844 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
845 gettimeofday(&sel.tclick1, NULL);
846 }
847
848 void
849 bmotion(XEvent *e) {
850 int starty, endy, oldey, oldex;
851
852 if(IS_SET(MODE_MOUSE)) {
853 mousereport(e);
854 return;
855 }
856
857 if(sel.mode) {
858 oldey = sel.ey;
859 oldex = sel.ex;
860 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
861
862 if(oldey != sel.ey || oldex != sel.ex) {
863 starty = MIN(oldey, sel.ey);
864 endy = MAX(oldey, sel.ey);
865 tsetdirt(starty, endy);
866 }
867 }
868 }
869
870 void
871 die(const char *errstr, ...) {
872 va_list ap;
873
874 va_start(ap, errstr);
875 vfprintf(stderr, errstr, ap);
876 va_end(ap);
877 exit(EXIT_FAILURE);
878 }
879
880 void
881 execsh(void) {
882 char **args;
883 char *envshell = getenv("SHELL");
884
885 unsetenv("COLUMNS");
886 unsetenv("LINES");
887 unsetenv("TERMCAP");
888
889 signal(SIGCHLD, SIG_DFL);
890 signal(SIGHUP, SIG_DFL);
891 signal(SIGINT, SIG_DFL);
892 signal(SIGQUIT, SIG_DFL);
893 signal(SIGTERM, SIG_DFL);
894 signal(SIGALRM, SIG_DFL);
895
896 DEFAULT(envshell, SHELL);
897 putenv("TERM="TNAME);
898 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
899 execvp(args[0], args);
900 exit(EXIT_FAILURE);
901 }
902
903 void
904 sigchld(int a) {
905 int stat = 0;
906
907 if(waitpid(pid, &stat, 0) < 0)
908 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
909
910 if(WIFEXITED(stat)) {
911 exit(WEXITSTATUS(stat));
912 } else {
913 exit(EXIT_FAILURE);
914 }
915 }
916
917 void
918 ttynew(void) {
919 int m, s;
920 struct winsize w = {term.row, term.col, 0, 0};
921
922 /* seems to work fine on linux, openbsd and freebsd */
923 if(openpty(&m, &s, NULL, NULL, &w) < 0)
924 die("openpty failed: %s\n", SERRNO);
925
926 switch(pid = fork()) {
927 case -1:
928 die("fork failed\n");
929 break;
930 case 0:
931 setsid(); /* create a new process group */
932 dup2(s, STDIN_FILENO);
933 dup2(s, STDOUT_FILENO);
934 dup2(s, STDERR_FILENO);
935 if(ioctl(s, TIOCSCTTY, NULL) < 0)
936 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
937 close(s);
938 close(m);
939 execsh();
940 break;
941 default:
942 close(s);
943 cmdfd = m;
944 signal(SIGCHLD, sigchld);
945 if(opt_io) {
946 iofd = (!strcmp(opt_io, "-")) ?
947 STDOUT_FILENO :
948 open(opt_io, O_WRONLY | O_CREAT, 0666);
949 if(iofd < 0) {
950 fprintf(stderr, "Error opening %s:%s\n",
951 opt_io, strerror(errno));
952 }
953 }
954 }
955 }
956
957 void
958 dump(char c) {
959 static int col;
960
961 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
962 if(++col % 10 == 0)
963 fprintf(stderr, "\n");
964 }
965
966 void
967 ttyread(void) {
968 static char buf[BUFSIZ];
969 static int buflen = 0;
970 char *ptr;
971 char s[UTF_SIZ];
972 int charsize; /* size of utf8 char in bytes */
973 long utf8c;
974 int ret;
975
976 /* append read bytes to unprocessed bytes */
977 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
978 die("Couldn't read from shell: %s\n", SERRNO);
979
980 /* process every complete utf8 char */
981 buflen += ret;
982 ptr = buf;
983 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
984 charsize = utf8decode(ptr, &utf8c);
985 utf8encode(&utf8c, s);
986 tputc(s, charsize);
987 ptr += charsize;
988 buflen -= charsize;
989 }
990
991 /* keep any uncomplete utf8 char for the next call */
992 memmove(buf, ptr, buflen);
993 }
994
995 void
996 ttywrite(const char *s, size_t n) {
997 if(write(cmdfd, s, n) == -1)
998 die("write error on tty: %s\n", SERRNO);
999 }
1000
1001 void
1002 ttyresize(void) {
1003 struct winsize w;
1004
1005 w.ws_row = term.row;
1006 w.ws_col = term.col;
1007 w.ws_xpixel = xw.tw;
1008 w.ws_ypixel = xw.th;
1009 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1010 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1011 }
1012
1013 void
1014 tsetdirt(int top, int bot) {
1015 int i;
1016
1017 LIMIT(top, 0, term.row-1);
1018 LIMIT(bot, 0, term.row-1);
1019
1020 for(i = top; i <= bot; i++)
1021 term.dirty[i] = 1;
1022 }
1023
1024 void
1025 tfulldirt(void) {
1026 tsetdirt(0, term.row-1);
1027 }
1028
1029 void
1030 tcursor(int mode) {
1031 static TCursor c;
1032
1033 if(mode == CURSOR_SAVE) {
1034 c = term.c;
1035 } else if(mode == CURSOR_LOAD) {
1036 term.c = c;
1037 tmoveto(c.x, c.y);
1038 }
1039 }
1040
1041 void
1042 treset(void) {
1043 uint i;
1044
1045 term.c = (TCursor){{
1046 .mode = ATTR_NULL,
1047 .fg = DefaultFG,
1048 .bg = DefaultBG
1049 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1050
1051 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1052 for(i = TAB; i < term.col; i += TAB)
1053 term.tabs[i] = 1;
1054 term.top = 0;
1055 term.bot = term.row - 1;
1056 term.mode = MODE_WRAP;
1057
1058 tclearregion(0, 0, term.col-1, term.row-1);
1059 }
1060
1061 void
1062 tnew(int col, int row) {
1063 /* set screen size */
1064 term.row = row;
1065 term.col = col;
1066 term.line = xmalloc(term.row * sizeof(Line));
1067 term.alt = xmalloc(term.row * sizeof(Line));
1068 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
1069 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
1070
1071 for(row = 0; row < term.row; row++) {
1072 term.line[row] = xmalloc(term.col * sizeof(Glyph));
1073 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
1074 term.dirty[row] = 0;
1075 }
1076 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1077 /* setup screen */
1078 treset();
1079 }
1080
1081 void
1082 tswapscreen(void) {
1083 Line *tmp = term.line;
1084
1085 term.line = term.alt;
1086 term.alt = tmp;
1087 term.mode ^= MODE_ALTSCREEN;
1088 tfulldirt();
1089 }
1090
1091 void
1092 tscrolldown(int orig, int n) {
1093 int i;
1094 Line temp;
1095
1096 LIMIT(n, 0, term.bot-orig+1);
1097
1098 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1099
1100 for(i = term.bot; i >= orig+n; i--) {
1101 temp = term.line[i];
1102 term.line[i] = term.line[i-n];
1103 term.line[i-n] = temp;
1104
1105 term.dirty[i] = 1;
1106 term.dirty[i-n] = 1;
1107 }
1108
1109 selscroll(orig, n);
1110 }
1111
1112 void
1113 tscrollup(int orig, int n) {
1114 int i;
1115 Line temp;
1116 LIMIT(n, 0, term.bot-orig+1);
1117
1118 tclearregion(0, orig, term.col-1, orig+n-1);
1119
1120 for(i = orig; i <= term.bot-n; i++) {
1121 temp = term.line[i];
1122 term.line[i] = term.line[i+n];
1123 term.line[i+n] = temp;
1124
1125 term.dirty[i] = 1;
1126 term.dirty[i+n] = 1;
1127 }
1128
1129 selscroll(orig, -n);
1130 }
1131
1132 void
1133 selscroll(int orig, int n) {
1134 if(sel.bx == -1)
1135 return;
1136
1137 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1138 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1139 sel.bx = -1;
1140 return;
1141 }
1142 if(sel.by < term.top) {
1143 sel.by = term.top;
1144 sel.bx = 0;
1145 }
1146 if(sel.ey > term.bot) {
1147 sel.ey = term.bot;
1148 sel.ex = term.col;
1149 }
1150 sel.b.y = sel.by, sel.b.x = sel.bx;
1151 sel.e.y = sel.ey, sel.e.x = sel.ex;
1152 }
1153 }
1154
1155 void
1156 tnewline(int first_col) {
1157 int y = term.c.y;
1158
1159 if(y == term.bot) {
1160 tscrollup(term.top, 1);
1161 } else {
1162 y++;
1163 }
1164 tmoveto(first_col ? 0 : term.c.x, y);
1165 }
1166
1167 void
1168 csiparse(void) {
1169 /* int noarg = 1; */
1170 char *p = csiescseq.buf;
1171
1172 csiescseq.narg = 0;
1173 if(*p == '?')
1174 csiescseq.priv = 1, p++;
1175
1176 while(p < csiescseq.buf+csiescseq.len) {
1177 while(isdigit(*p)) {
1178 csiescseq.arg[csiescseq.narg] *= 10;
1179 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1180 }
1181 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ) {
1182 csiescseq.narg++, p++;
1183 } else {
1184 csiescseq.mode = *p;
1185 csiescseq.narg++;
1186
1187 return;
1188 }
1189 }
1190 }
1191
1192 void
1193 tmoveto(int x, int y) {
1194 LIMIT(x, 0, term.col-1);
1195 LIMIT(y, 0, term.row-1);
1196 term.c.state &= ~CURSOR_WRAPNEXT;
1197 term.c.x = x;
1198 term.c.y = y;
1199 }
1200
1201 void
1202 tsetchar(char *c, Glyph *attr, int x, int y) {
1203 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1204 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1205 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1206 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1207 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1208 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1209 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1210 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1211 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1212 };
1213
1214 /*
1215 * The table is proudly stolen from rxvt.
1216 */
1217 if(attr->mode & ATTR_GFX) {
1218 if(c[0] >= 0x41 && c[0] <= 0x7e
1219 && vt100_0[c[0] - 0x41]) {
1220 c = vt100_0[c[0] - 0x41];
1221 }
1222 }
1223
1224 term.dirty[y] = 1;
1225 term.line[y][x] = *attr;
1226 memcpy(term.line[y][x].c, c, UTF_SIZ);
1227 term.line[y][x].state |= GLYPH_SET;
1228 }
1229
1230 void
1231 tclearregion(int x1, int y1, int x2, int y2) {
1232 int x, y, temp;
1233
1234 if(x1 > x2)
1235 temp = x1, x1 = x2, x2 = temp;
1236 if(y1 > y2)
1237 temp = y1, y1 = y2, y2 = temp;
1238
1239 LIMIT(x1, 0, term.col-1);
1240 LIMIT(x2, 0, term.col-1);
1241 LIMIT(y1, 0, term.row-1);
1242 LIMIT(y2, 0, term.row-1);
1243
1244 for(y = y1; y <= y2; y++) {
1245 term.dirty[y] = 1;
1246 for(x = x1; x <= x2; x++)
1247 term.line[y][x].state = 0;
1248 }
1249 }
1250
1251 void
1252 tdeletechar(int n) {
1253 int src = term.c.x + n;
1254 int dst = term.c.x;
1255 int size = term.col - src;
1256
1257 term.dirty[term.c.y] = 1;
1258
1259 if(src >= term.col) {
1260 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1261 return;
1262 }
1263
1264 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1265 size * sizeof(Glyph));
1266 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1267 }
1268
1269 void
1270 tinsertblank(int n) {
1271 int src = term.c.x;
1272 int dst = src + n;
1273 int size = term.col - dst;
1274
1275 term.dirty[term.c.y] = 1;
1276
1277 if(dst >= term.col) {
1278 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1279 return;
1280 }
1281
1282 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1283 size * sizeof(Glyph));
1284 tclearregion(src, term.c.y, dst - 1, term.c.y);
1285 }
1286
1287 void
1288 tinsertblankline(int n) {
1289 if(term.c.y < term.top || term.c.y > term.bot)
1290 return;
1291
1292 tscrolldown(term.c.y, n);
1293 }
1294
1295 void
1296 tdeleteline(int n) {
1297 if(term.c.y < term.top || term.c.y > term.bot)
1298 return;
1299
1300 tscrollup(term.c.y, n);
1301 }
1302
1303 void
1304 tsetattr(int *attr, int l) {
1305 int i;
1306
1307 for(i = 0; i < l; i++) {
1308 switch(attr[i]) {
1309 case 0:
1310 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1311 | ATTR_ITALIC | ATTR_BLINK);
1312 term.c.attr.fg = DefaultFG;
1313 term.c.attr.bg = DefaultBG;
1314 break;
1315 case 1:
1316 term.c.attr.mode |= ATTR_BOLD;
1317 break;
1318 case 3: /* enter standout (highlight) */
1319 term.c.attr.mode |= ATTR_ITALIC;
1320 break;
1321 case 4:
1322 term.c.attr.mode |= ATTR_UNDERLINE;
1323 break;
1324 case 5:
1325 term.c.attr.mode |= ATTR_BLINK;
1326 break;
1327 case 7:
1328 term.c.attr.mode |= ATTR_REVERSE;
1329 break;
1330 case 21:
1331 case 22:
1332 term.c.attr.mode &= ~ATTR_BOLD;
1333 break;
1334 case 23: /* leave standout (highlight) mode */
1335 term.c.attr.mode &= ~ATTR_ITALIC;
1336 break;
1337 case 24:
1338 term.c.attr.mode &= ~ATTR_UNDERLINE;
1339 break;
1340 case 25:
1341 term.c.attr.mode &= ~ATTR_BLINK;
1342 break;
1343 case 27:
1344 term.c.attr.mode &= ~ATTR_REVERSE;
1345 break;
1346 case 38:
1347 if(i + 2 < l && attr[i + 1] == 5) {
1348 i += 2;
1349 if(BETWEEN(attr[i], 0, 255)) {
1350 term.c.attr.fg = attr[i];
1351 } else {
1352 fprintf(stderr,
1353 "erresc: bad fgcolor %d\n",
1354 attr[i]);
1355 }
1356 } else {
1357 fprintf(stderr,
1358 "erresc(38): gfx attr %d unknown\n",
1359 attr[i]);
1360 }
1361 break;
1362 case 39:
1363 term.c.attr.fg = DefaultFG;
1364 break;
1365 case 48:
1366 if(i + 2 < l && attr[i + 1] == 5) {
1367 i += 2;
1368 if(BETWEEN(attr[i], 0, 255)) {
1369 term.c.attr.bg = attr[i];
1370 } else {
1371 fprintf(stderr,
1372 "erresc: bad bgcolor %d\n",
1373 attr[i]);
1374 }
1375 } else {
1376 fprintf(stderr,
1377 "erresc(48): gfx attr %d unknown\n",
1378 attr[i]);
1379 }
1380 break;
1381 case 49:
1382 term.c.attr.bg = DefaultBG;
1383 break;
1384 default:
1385 if(BETWEEN(attr[i], 30, 37)) {
1386 term.c.attr.fg = attr[i] - 30;
1387 } else if(BETWEEN(attr[i], 40, 47)) {
1388 term.c.attr.bg = attr[i] - 40;
1389 } else if(BETWEEN(attr[i], 90, 97)) {
1390 term.c.attr.fg = attr[i] - 90 + 8;
1391 } else if(BETWEEN(attr[i], 100, 107)) {
1392 term.c.attr.bg = attr[i] - 100 + 8;
1393 } else {
1394 fprintf(stderr,
1395 "erresc(default): gfx attr %d unknown\n",
1396 attr[i]), csidump();
1397 }
1398 break;
1399 }
1400 }
1401 }
1402
1403 void
1404 tsetscroll(int t, int b) {
1405 int temp;
1406
1407 LIMIT(t, 0, term.row-1);
1408 LIMIT(b, 0, term.row-1);
1409 if(t > b) {
1410 temp = t;
1411 t = b;
1412 b = temp;
1413 }
1414 term.top = t;
1415 term.bot = b;
1416 }
1417
1418 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1419
1420 void
1421 tsetmode(bool priv, bool set, int *args, int narg) {
1422 int *lim, mode;
1423
1424 for(lim = args + narg; args < lim; ++args) {
1425 if(priv) {
1426 switch(*args) {
1427 break;
1428 case 1: /* DECCKM -- Cursor key */
1429 MODBIT(term.mode, set, MODE_APPKEYPAD);
1430 break;
1431 case 5: /* DECSCNM -- Reverse video */
1432 mode = term.mode;
1433 MODBIT(term.mode, set, MODE_REVERSE);
1434 if(mode != term.mode)
1435 redraw();
1436 break;
1437 case 6: /* XXX: DECOM -- Origin */
1438 break;
1439 case 7: /* DECAWM -- Auto wrap */
1440 MODBIT(term.mode, set, MODE_WRAP);
1441 break;
1442 case 8: /* XXX: DECARM -- Auto repeat */
1443 break;
1444 case 0: /* Error (IGNORED) */
1445 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1446 break;
1447 case 25:
1448 MODBIT(term.c.state, !set, CURSOR_HIDE);
1449 break;
1450 case 1000: /* 1000,1002: enable xterm mouse report */
1451 MODBIT(term.mode, set, MODE_MOUSEBTN);
1452 break;
1453 case 1002:
1454 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1455 break;
1456 case 1049: /* = 1047 and 1048 */
1457 case 47:
1458 case 1047:
1459 if(IS_SET(MODE_ALTSCREEN))
1460 tclearregion(0, 0, term.col-1, term.row-1);
1461 if((set && !IS_SET(MODE_ALTSCREEN)) ||
1462 (!set && IS_SET(MODE_ALTSCREEN))) {
1463 tswapscreen();
1464 }
1465 if(*args != 1049)
1466 break;
1467 /* pass through */
1468 case 1048:
1469 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1470 break;
1471 default:
1472 /* case 2: DECANM -- ANSI/VT52 (NOT SUPPOURTED) */
1473 /* case 3: DECCOLM -- Column (NOT SUPPORTED) */
1474 /* case 4: DECSCLM -- Scroll (NOT SUPPORTED) */
1475 /* case 18: DECPFF -- Printer feed (NOT SUPPORTED) */
1476 /* case 19: DECPEX -- Printer extent (NOT SUPPORTED) */
1477 /* case 42: DECNRCM -- National characters (NOT SUPPORTED) */
1478 fprintf(stderr,
1479 "erresc: unknown private set/reset mode %d\n",
1480 *args);
1481 break;
1482 }
1483 } else {
1484 switch(*args) {
1485 case 0: /* Error (IGNORED) */
1486 break;
1487 case 2: /* KAM -- keyboard action */
1488 MODBIT(term.mode, set, MODE_KBDLOCK);
1489 break;
1490 case 4: /* IRM -- Insertion-replacement */
1491 MODBIT(term.mode, set, MODE_INSERT);
1492 break;
1493 case 12: /* XXX: SRM -- Send/Receive */
1494 break;
1495 case 20: /* LNM -- Linefeed/new line */
1496 MODBIT(term.mode, set, MODE_CRLF);
1497 break;
1498 default:
1499 fprintf(stderr,
1500 "erresc: unknown set/reset mode %d\n",
1501 *args);
1502 break;
1503 }
1504 }
1505 }
1506 }
1507 #undef MODBIT
1508
1509
1510 void
1511 csihandle(void) {
1512 switch(csiescseq.mode) {
1513 default:
1514 unknown:
1515 fprintf(stderr, "erresc: unknown csi ");
1516 csidump();
1517 /* die(""); */
1518 break;
1519 case '@': /* ICH -- Insert <n> blank char */
1520 DEFAULT(csiescseq.arg[0], 1);
1521 tinsertblank(csiescseq.arg[0]);
1522 break;
1523 case 'A': /* CUU -- Cursor <n> Up */
1524 case 'e':
1525 DEFAULT(csiescseq.arg[0], 1);
1526 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1527 break;
1528 case 'B': /* CUD -- Cursor <n> Down */
1529 DEFAULT(csiescseq.arg[0], 1);
1530 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1531 break;
1532 case 'c': /* DA -- Device Attributes */
1533 if(csiescseq.arg[0] == 0)
1534 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1535 break;
1536 case 'C': /* CUF -- Cursor <n> Forward */
1537 case 'a':
1538 DEFAULT(csiescseq.arg[0], 1);
1539 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1540 break;
1541 case 'D': /* CUB -- Cursor <n> Backward */
1542 DEFAULT(csiescseq.arg[0], 1);
1543 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1544 break;
1545 case 'E': /* CNL -- Cursor <n> Down and first col */
1546 DEFAULT(csiescseq.arg[0], 1);
1547 tmoveto(0, term.c.y+csiescseq.arg[0]);
1548 break;
1549 case 'F': /* CPL -- Cursor <n> Up and first col */
1550 DEFAULT(csiescseq.arg[0], 1);
1551 tmoveto(0, term.c.y-csiescseq.arg[0]);
1552 break;
1553 case 'g': /* TBC -- Tabulation clear */
1554 switch (csiescseq.arg[0]) {
1555 case 0: /* clear current tab stop */
1556 term.tabs[term.c.x] = 0;
1557 break;
1558 case 3: /* clear all the tabs */
1559 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1560 break;
1561 default:
1562 goto unknown;
1563 }
1564 break;
1565 case 'G': /* CHA -- Move to <col> */
1566 case '`': /* HPA */
1567 DEFAULT(csiescseq.arg[0], 1);
1568 tmoveto(csiescseq.arg[0]-1, term.c.y);
1569 break;
1570 case 'H': /* CUP -- Move to <row> <col> */
1571 case 'f': /* HVP */
1572 DEFAULT(csiescseq.arg[0], 1);
1573 DEFAULT(csiescseq.arg[1], 1);
1574 tmoveto(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1575 break;
1576 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1577 DEFAULT(csiescseq.arg[0], 1);
1578 while(csiescseq.arg[0]--)
1579 tputtab(1);
1580 break;
1581 case 'J': /* ED -- Clear screen */
1582 sel.bx = -1;
1583 switch(csiescseq.arg[0]) {
1584 case 0: /* below */
1585 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1586 if(term.c.y < term.row-1)
1587 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1588 break;
1589 case 1: /* above */
1590 if(term.c.y > 1)
1591 tclearregion(0, 0, term.col-1, term.c.y-1);
1592 tclearregion(0, term.c.y, term.c.x, term.c.y);
1593 break;
1594 case 2: /* all */
1595 tclearregion(0, 0, term.col-1, term.row-1);
1596 break;
1597 default:
1598 goto unknown;
1599 }
1600 break;
1601 case 'K': /* EL -- Clear line */
1602 switch(csiescseq.arg[0]) {
1603 case 0: /* right */
1604 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1605 break;
1606 case 1: /* left */
1607 tclearregion(0, term.c.y, term.c.x, term.c.y);
1608 break;
1609 case 2: /* all */
1610 tclearregion(0, term.c.y, term.col-1, term.c.y);
1611 break;
1612 }
1613 break;
1614 case 'S': /* SU -- Scroll <n> line up */
1615 DEFAULT(csiescseq.arg[0], 1);
1616 tscrollup(term.top, csiescseq.arg[0]);
1617 break;
1618 case 'T': /* SD -- Scroll <n> line down */
1619 DEFAULT(csiescseq.arg[0], 1);
1620 tscrolldown(term.top, csiescseq.arg[0]);
1621 break;
1622 case 'L': /* IL -- Insert <n> blank lines */
1623 DEFAULT(csiescseq.arg[0], 1);
1624 tinsertblankline(csiescseq.arg[0]);
1625 break;
1626 case 'l': /* RM -- Reset Mode */
1627 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1628 break;
1629 case 'M': /* DL -- Delete <n> lines */
1630 DEFAULT(csiescseq.arg[0], 1);
1631 tdeleteline(csiescseq.arg[0]);
1632 break;
1633 case 'X': /* ECH -- Erase <n> char */
1634 DEFAULT(csiescseq.arg[0], 1);
1635 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
1636 break;
1637 case 'P': /* DCH -- Delete <n> char */
1638 DEFAULT(csiescseq.arg[0], 1);
1639 tdeletechar(csiescseq.arg[0]);
1640 break;
1641 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1642 DEFAULT(csiescseq.arg[0], 1);
1643 while(csiescseq.arg[0]--)
1644 tputtab(0);
1645 break;
1646 case 'd': /* VPA -- Move to <row> */
1647 DEFAULT(csiescseq.arg[0], 1);
1648 tmoveto(term.c.x, csiescseq.arg[0]-1);
1649 break;
1650 case 'h': /* SM -- Set terminal mode */
1651 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1652 break;
1653 case 'm': /* SGR -- Terminal attribute (color) */
1654 tsetattr(csiescseq.arg, csiescseq.narg);
1655 break;
1656 case 'r': /* DECSTBM -- Set Scrolling Region */
1657 if(csiescseq.priv) {
1658 goto unknown;
1659 } else {
1660 DEFAULT(csiescseq.arg[0], 1);
1661 DEFAULT(csiescseq.arg[1], term.row);
1662 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1663 tmoveto(0, 0);
1664 }
1665 break;
1666 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1667 tcursor(CURSOR_SAVE);
1668 break;
1669 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1670 tcursor(CURSOR_LOAD);
1671 break;
1672 }
1673 }
1674
1675 void
1676 csidump(void) {
1677 int i;
1678 uint c;
1679
1680 printf("ESC[");
1681 for(i = 0; i < csiescseq.len; i++) {
1682 c = csiescseq.buf[i] & 0xff;
1683 if(isprint(c)) {
1684 putchar(c);
1685 } else if(c == '\n') {
1686 printf("(\\n)");
1687 } else if(c == '\r') {
1688 printf("(\\r)");
1689 } else if(c == 0x1b) {
1690 printf("(\\e)");
1691 } else {
1692 printf("(%02x)", c);
1693 }
1694 }
1695 putchar('\n');
1696 }
1697
1698 void
1699 csireset(void) {
1700 memset(&csiescseq, 0, sizeof(csiescseq));
1701 }
1702
1703 void
1704 strhandle(void) {
1705 char *p;
1706
1707 /*
1708 * TODO: make this being useful in case of color palette change.
1709 */
1710 strparse();
1711
1712 p = strescseq.buf;
1713
1714 switch(strescseq.type) {
1715 case ']': /* OSC -- Operating System Command */
1716 switch(p[0]) {
1717 case '0':
1718 case '1':
1719 case '2':
1720 /*
1721 * TODO: Handle special chars in string, like umlauts.
1722 */
1723 if(p[1] == ';') {
1724 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1725 }
1726 break;
1727 case ';':
1728 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1729 break;
1730 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1731 break;
1732 default:
1733 fprintf(stderr, "erresc: unknown str ");
1734 strdump();
1735 break;
1736 }
1737 break;
1738 case 'k': /* old title set compatibility */
1739 XStoreName(xw.dpy, xw.win, strescseq.buf);
1740 break;
1741 case 'P': /* DSC -- Device Control String */
1742 case '_': /* APC -- Application Program Command */
1743 case '^': /* PM -- Privacy Message */
1744 default:
1745 fprintf(stderr, "erresc: unknown str ");
1746 strdump();
1747 /* die(""); */
1748 break;
1749 }
1750 }
1751
1752 void
1753 strparse(void) {
1754 /*
1755 * TODO: Implement parsing like for CSI when required.
1756 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1757 */
1758 return;
1759 }
1760
1761 void
1762 strdump(void) {
1763 int i;
1764 uint c;
1765
1766 printf("ESC%c", strescseq.type);
1767 for(i = 0; i < strescseq.len; i++) {
1768 c = strescseq.buf[i] & 0xff;
1769 if(isprint(c)) {
1770 putchar(c);
1771 } else if(c == '\n') {
1772 printf("(\\n)");
1773 } else if(c == '\r') {
1774 printf("(\\r)");
1775 } else if(c == 0x1b) {
1776 printf("(\\e)");
1777 } else {
1778 printf("(%02x)", c);
1779 }
1780 }
1781 printf("ESC\\\n");
1782 }
1783
1784 void
1785 strreset(void) {
1786 memset(&strescseq, 0, sizeof(strescseq));
1787 }
1788
1789 void
1790 tputtab(bool forward) {
1791 uint x = term.c.x;
1792
1793 if(forward) {
1794 if(x == term.col)
1795 return;
1796 for(++x; x < term.col && !term.tabs[x]; ++x)
1797 /* nothing */ ;
1798 } else {
1799 if(x == 0)
1800 return;
1801 for(--x; x > 0 && !term.tabs[x]; --x)
1802 /* nothing */ ;
1803 }
1804 tmoveto(x, term.c.y);
1805 }
1806
1807 void
1808 tputc(char *c, int len) {
1809 uchar ascii = *c;
1810 bool control = ascii < '\x20' || ascii == 0177;
1811
1812 if(iofd != -1) {
1813 if (xwrite(iofd, c, len) < 0) {
1814 fprintf(stderr, "Error writting in %s:%s\n",
1815 opt_io, strerror(errno));
1816 close(iofd);
1817 iofd = -1;
1818 }
1819 }
1820 /*
1821 * STR sequences must be checked before of anything
1822 * because it can use some control codes as part of the sequence
1823 */
1824 if(term.esc & ESC_STR) {
1825 switch(ascii) {
1826 case '\033':
1827 term.esc = ESC_START | ESC_STR_END;
1828 break;
1829 case '\a': /* backwards compatibility to xterm */
1830 term.esc = 0;
1831 strhandle();
1832 break;
1833 default:
1834 strescseq.buf[strescseq.len++] = ascii;
1835 if(strescseq.len+1 >= STR_BUF_SIZ) {
1836 term.esc = 0;
1837 strhandle();
1838 }
1839 }
1840 return;
1841 }
1842 /*
1843 * Actions of control codes must be performed as soon they arrive
1844 * because they can be embedded inside a control sequence, and
1845 * they must not cause conflicts with sequences.
1846 */
1847 if(control) {
1848 switch(ascii) {
1849 case '\t': /* HT */
1850 tputtab(1);
1851 return;
1852 case '\b': /* BS */
1853 tmoveto(term.c.x-1, term.c.y);
1854 return;
1855 case '\r': /* CR */
1856 tmoveto(0, term.c.y);
1857 return;
1858 case '\f': /* LF */
1859 case '\v': /* VT */
1860 case '\n': /* LF */
1861 /* go to first col if the mode is set */
1862 tnewline(IS_SET(MODE_CRLF));
1863 return;
1864 case '\a': /* BEL */
1865 if(!(xw.state & WIN_FOCUSED))
1866 xseturgency(1);
1867 return;
1868 case '\033': /* ESC */
1869 csireset();
1870 term.esc = ESC_START;
1871 return;
1872 case '\016': /* SO */
1873 term.c.attr.mode |= ATTR_GFX;
1874 return;
1875 case '\017': /* SI */
1876 term.c.attr.mode &= ~ATTR_GFX;
1877 return;
1878 case '\032': /* SUB */
1879 case '\030': /* CAN */
1880 csireset();
1881 return;
1882 case '\005': /* ENQ (IGNORED) */
1883 case '\000': /* NUL (IGNORED) */
1884 case '\021': /* XON (IGNORED) */
1885 case '\023': /* XOFF (IGNORED) */
1886 case 0177: /* DEL (IGNORED) */
1887 return;
1888 }
1889 } else if(term.esc & ESC_START) {
1890 if(term.esc & ESC_CSI) {
1891 csiescseq.buf[csiescseq.len++] = ascii;
1892 if(BETWEEN(ascii, 0x40, 0x7E)
1893 || csiescseq.len >= ESC_BUF_SIZ) {
1894 term.esc = 0;
1895 csiparse(), csihandle();
1896 }
1897 } else if(term.esc & ESC_STR_END) {
1898 term.esc = 0;
1899 if(ascii == '\\')
1900 strhandle();
1901 } else if(term.esc & ESC_ALTCHARSET) {
1902 switch(ascii) {
1903 case '0': /* Line drawing set */
1904 term.c.attr.mode |= ATTR_GFX;
1905 break;
1906 case 'B': /* USASCII */
1907 term.c.attr.mode &= ~ATTR_GFX;
1908 break;
1909 case 'A': /* UK (IGNORED) */
1910 case '<': /* multinational charset (IGNORED) */
1911 case '5': /* Finnish (IGNORED) */
1912 case 'C': /* Finnish (IGNORED) */
1913 case 'K': /* German (IGNORED) */
1914 break;
1915 default:
1916 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1917 }
1918 term.esc = 0;
1919 } else if(term.esc & ESC_TEST) {
1920 if(ascii == '8') { /* DEC screen alignment test. */
1921 char E[UTF_SIZ] = "E";
1922 int x, y;
1923
1924 for(x = 0; x < term.col; ++x) {
1925 for(y = 0; y < term.row; ++y)
1926 tsetchar(E, &term.c.attr, x, y);
1927 }
1928 }
1929 term.esc = 0;
1930 } else {
1931 switch(ascii) {
1932 case '[':
1933 term.esc |= ESC_CSI;
1934 break;
1935 case '#':
1936 term.esc |= ESC_TEST;
1937 break;
1938 case 'P': /* DCS -- Device Control String */
1939 case '_': /* APC -- Application Program Command */
1940 case '^': /* PM -- Privacy Message */
1941 case ']': /* OSC -- Operating System Command */
1942 case 'k': /* old title set compatibility */
1943 strreset();
1944 strescseq.type = ascii;
1945 term.esc |= ESC_STR;
1946 break;
1947 case '(': /* set primary charset G0 */
1948 term.esc |= ESC_ALTCHARSET;
1949 break;
1950 case ')': /* set secondary charset G1 (IGNORED) */
1951 case '*': /* set tertiary charset G2 (IGNORED) */
1952 case '+': /* set quaternary charset G3 (IGNORED) */
1953 term.esc = 0;
1954 break;
1955 case 'D': /* IND -- Linefeed */
1956 if(term.c.y == term.bot) {
1957 tscrollup(term.top, 1);
1958 } else {
1959 tmoveto(term.c.x, term.c.y+1);
1960 }
1961 term.esc = 0;
1962 break;
1963 case 'E': /* NEL -- Next line */
1964 tnewline(1); /* always go to first col */
1965 term.esc = 0;
1966 break;
1967 case 'H': /* HTS -- Horizontal tab stop */
1968 term.tabs[term.c.x] = 1;
1969 term.esc = 0;
1970 break;
1971 case 'M': /* RI -- Reverse index */
1972 if(term.c.y == term.top) {
1973 tscrolldown(term.top, 1);
1974 } else {
1975 tmoveto(term.c.x, term.c.y-1);
1976 }
1977 term.esc = 0;
1978 break;
1979 case 'Z': /* DECID -- Identify Terminal */
1980 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1981 term.esc = 0;
1982 break;
1983 case 'c': /* RIS -- Reset to inital state */
1984 treset();
1985 term.esc = 0;
1986 xresettitle();
1987 break;
1988 case '=': /* DECPAM -- Application keypad */
1989 term.mode |= MODE_APPKEYPAD;
1990 term.esc = 0;
1991 break;
1992 case '>': /* DECPNM -- Normal keypad */
1993 term.mode &= ~MODE_APPKEYPAD;
1994 term.esc = 0;
1995 break;
1996 case '7': /* DECSC -- Save Cursor */
1997 tcursor(CURSOR_SAVE);
1998 term.esc = 0;
1999 break;
2000 case '8': /* DECRC -- Restore Cursor */
2001 tcursor(CURSOR_LOAD);
2002 term.esc = 0;
2003 break;
2004 case '\\': /* ST -- Stop */
2005 term.esc = 0;
2006 break;
2007 default:
2008 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2009 (uchar) ascii, isprint(ascii)? ascii:'.');
2010 term.esc = 0;
2011 }
2012 }
2013 /*
2014 * All characters which forms part of a sequence are not
2015 * printed
2016 */
2017 return;
2018 }
2019 /*
2020 * Display control codes only if we are in graphic mode
2021 */
2022 if(control && !(term.c.attr.mode & ATTR_GFX))
2023 return;
2024 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2025 sel.bx = -1;
2026 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2027 tnewline(1); /* always go to first col */
2028 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2029 if(term.c.x+1 < term.col)
2030 tmoveto(term.c.x+1, term.c.y);
2031 else
2032 term.c.state |= CURSOR_WRAPNEXT;
2033 }
2034
2035 int
2036 tresize(int col, int row) {
2037 int i, x;
2038 int minrow = MIN(row, term.row);
2039 int mincol = MIN(col, term.col);
2040 int slide = term.c.y - row + 1;
2041 bool *bp;
2042
2043 if(col < 1 || row < 1)
2044 return 0;
2045
2046 /* free unneeded rows */
2047 i = 0;
2048 if(slide > 0) {
2049 /* slide screen to keep cursor where we expect it -
2050 * tscrollup would work here, but we can optimize to
2051 * memmove because we're freeing the earlier lines */
2052 for(/* i = 0 */; i < slide; i++) {
2053 free(term.line[i]);
2054 free(term.alt[i]);
2055 }
2056 memmove(term.line, term.line + slide, row * sizeof(Line));
2057 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2058 }
2059 for(i += row; i < term.row; i++) {
2060 free(term.line[i]);
2061 free(term.alt[i]);
2062 }
2063
2064 /* resize to new height */
2065 term.line = xrealloc(term.line, row * sizeof(Line));
2066 term.alt = xrealloc(term.alt, row * sizeof(Line));
2067 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2068 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2069
2070 /* resize each row to new width, zero-pad if needed */
2071 for(i = 0; i < minrow; i++) {
2072 term.dirty[i] = 1;
2073 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2074 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2075 for(x = mincol; x < col; x++) {
2076 term.line[i][x].state = 0;
2077 term.alt[i][x].state = 0;
2078 }
2079 }
2080
2081 /* allocate any new rows */
2082 for(/* i == minrow */; i < row; i++) {
2083 term.dirty[i] = 1;
2084 term.line[i] = xcalloc(col, sizeof(Glyph));
2085 term.alt [i] = xcalloc(col, sizeof(Glyph));
2086 }
2087 if(col > term.col) {
2088 bp = term.tabs + term.col;
2089
2090 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2091 while(--bp > term.tabs && !*bp)
2092 /* nothing */ ;
2093 for(bp += TAB; bp < term.tabs + col; bp += TAB)
2094 *bp = 1;
2095 }
2096 /* update terminal size */
2097 term.col = col, term.row = row;
2098 /* make use of the LIMIT in tmoveto */
2099 tmoveto(term.c.x, term.c.y);
2100 /* reset scrolling region */
2101 tsetscroll(0, row-1);
2102
2103 return (slide > 0);
2104 }
2105
2106 void
2107 xresize(int col, int row) {
2108 xw.tw = MAX(1, 2*BORDER + col * xw.cw);
2109 xw.th = MAX(1, 2*BORDER + row * xw.ch);
2110
2111 XftDrawChange(xw.xft_draw, xw.buf);
2112 }
2113
2114 void
2115 xloadcols(void) {
2116 int i, r, g, b;
2117 XRenderColor xft_color = { .alpha = 0 };
2118
2119 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2120 for(i = 0; i < LEN(colorname); i++) {
2121 if(!colorname[i])
2122 continue;
2123 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.xft_col[i])) {
2124 die("Could not allocate color '%s'\n", colorname[i]);
2125 }
2126 }
2127
2128 /* load colors [16-255] ; same colors as xterm */
2129 for(i = 16, r = 0; r < 6; r++) {
2130 for(g = 0; g < 6; g++) {
2131 for(b = 0; b < 6; b++) {
2132 xft_color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
2133 xft_color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
2134 xft_color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
2135 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &xft_color, &dc.xft_col[i])) {
2136 die("Could not allocate color %d\n", i);
2137 }
2138 i++;
2139 }
2140 }
2141 }
2142
2143 for(r = 0; r < 24; r++, i++) {
2144 xft_color.red = xft_color.green = xft_color.blue = 0x0808 + 0x0a0a * r;
2145 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &xft_color,
2146 &dc.xft_col[i])) {
2147 die("Could not allocate color %d\n", i);
2148 }
2149 }
2150 }
2151
2152 void
2153 xtermclear(int col1, int row1, int col2, int row2) {
2154 XftDrawRect(xw.xft_draw,
2155 &dc.xft_col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG],
2156 BORDER + col1 * xw.cw,
2157 BORDER + row1 * xw.ch,
2158 (col2-col1+1) * xw.cw,
2159 (row2-row1+1) * xw.ch);
2160 }
2161
2162 /*
2163 * Absolute coordinates.
2164 */
2165 void
2166 xclear(int x1, int y1, int x2, int y2) {
2167 XftDrawRect(xw.xft_draw,
2168 &dc.xft_col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG],
2169 x1, y1, x2-x1, y2-y1);
2170 }
2171
2172 void
2173 xhints(void) {
2174 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
2175 XWMHints wm = {.flags = InputHint, .input = 1};
2176 XSizeHints *sizeh = NULL;
2177
2178 sizeh = XAllocSizeHints();
2179 if(xw.isfixed == False) {
2180 sizeh->flags = PSize | PResizeInc | PBaseSize;
2181 sizeh->height = xw.h;
2182 sizeh->width = xw.w;
2183 sizeh->height_inc = xw.ch;
2184 sizeh->width_inc = xw.cw;
2185 sizeh->base_height = 2*BORDER;
2186 sizeh->base_width = 2*BORDER;
2187 } else {
2188 sizeh->flags = PMaxSize | PMinSize;
2189 sizeh->min_width = sizeh->max_width = xw.fw;
2190 sizeh->min_height = sizeh->max_height = xw.fh;
2191 }
2192
2193 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2194 XFree(sizeh);
2195 }
2196
2197 void
2198 xinitfont(Font *f, char *fontstr) {
2199 FcPattern *pattern, *match;
2200 FcResult result;
2201
2202 pattern = FcNameParse((FcChar8 *)fontstr);
2203 if(!pattern)
2204 die("st: can't open font %s\n", fontstr);
2205
2206 match = XftFontMatch(xw.dpy, xw.scr, pattern, &result);
2207 FcPatternDestroy(pattern);
2208 if(!match)
2209 die("st: can't open font %s\n", fontstr);
2210 if(!(f->xft_set = XftFontOpenPattern(xw.dpy, match))) {
2211 FcPatternDestroy(match);
2212 die("st: can't open font %s.\n", fontstr);
2213 }
2214
2215 f->ascent = f->xft_set->ascent;
2216 f->descent = f->xft_set->descent;
2217 f->lbearing = 0;
2218 f->rbearing = f->xft_set->max_advance_width;
2219
2220 f->height = f->xft_set->height;
2221 f->width = f->lbearing + f->rbearing;
2222 }
2223
2224 void
2225 initfonts(char *fontstr) {
2226 char *fstr;
2227
2228 xinitfont(&dc.font, fontstr);
2229 xw.cw = dc.font.width;
2230 xw.ch = dc.font.height;
2231
2232 fstr = smstrcat(fontstr, ":weight=bold", NULL);
2233 xinitfont(&dc.bfont, fstr);
2234 free(fstr);
2235
2236 fstr = smstrcat(fontstr, ":slant=italic,oblique", NULL);
2237 xinitfont(&dc.ifont, fstr);
2238 free(fstr);
2239
2240 fstr = smstrcat(fontstr, ":weight=bold:slant=italic,oblique", NULL);
2241 xinitfont(&dc.ibfont, fstr);
2242 free(fstr);
2243 }
2244
2245 void
2246 xinit(void) {
2247 XSetWindowAttributes attrs;
2248 Cursor cursor;
2249 Window parent;
2250 int sw, sh, major, minor;
2251
2252 if(!(xw.dpy = XOpenDisplay(NULL)))
2253 die("Can't open display\n");
2254 xw.scr = XDefaultScreen(xw.dpy);
2255 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2256
2257 /* font */
2258 initfonts((opt_font != NULL)? opt_font : FONT);
2259
2260 /* colors */
2261 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2262 xloadcols();
2263
2264 /* adjust fixed window geometry */
2265 if(xw.isfixed) {
2266 sw = DisplayWidth(xw.dpy, xw.scr);
2267 sh = DisplayHeight(xw.dpy, xw.scr);
2268 if(xw.fx < 0)
2269 xw.fx = sw + xw.fx - xw.fw - 1;
2270 if(xw.fy < 0)
2271 xw.fy = sh + xw.fy - xw.fh - 1;
2272
2273 xw.h = xw.fh;
2274 xw.w = xw.fw;
2275 } else {
2276 /* window - default size */
2277 xw.h = 2*BORDER + term.row * xw.ch;
2278 xw.w = 2*BORDER + term.col * xw.cw;
2279 xw.fx = 0;
2280 xw.fy = 0;
2281 }
2282
2283 attrs.background_pixel = dc.xft_col[DefaultBG].pixel;
2284 attrs.border_pixel = dc.xft_col[DefaultBG].pixel;
2285 attrs.bit_gravity = NorthWestGravity;
2286 attrs.event_mask = FocusChangeMask | KeyPressMask
2287 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2288 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2289 attrs.colormap = xw.cmap;
2290
2291 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
2292 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2293 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2294 xw.vis,
2295 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2296 | CWColormap,
2297 &attrs);
2298
2299 /* double buffering */
2300 if(!XdbeQueryExtension(xw.dpy, &major, &minor))
2301 die("Xdbe extension is not present\n");
2302 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
2303
2304 /* Xft rendering context */
2305 xw.xft_draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2306
2307 /* input methods */
2308 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
2309 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2310 | XIMStatusNothing, XNClientWindow, xw.win,
2311 XNFocusWindow, xw.win, NULL);
2312 /* gc */
2313 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
2314
2315 /* white cursor, black outline */
2316 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2317 XDefineCursor(xw.dpy, xw.win, cursor);
2318 XRecolorCursor(xw.dpy, cursor,
2319 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2320 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2321
2322 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2323 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2324 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2325
2326 xresettitle();
2327 XMapWindow(xw.dpy, xw.win);
2328 xhints();
2329 XSync(xw.dpy, 0);
2330 }
2331
2332 void
2333 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2334 int winx = BORDER + x * xw.cw, winy = BORDER + y * xw.ch,
2335 width = charlen * xw.cw;
2336 Font *font = &dc.font;
2337 XGlyphInfo extents;
2338 XftColor *fg = &dc.xft_col[base.fg], *bg = &dc.xft_col[base.bg],
2339 *temp, revfg, revbg;
2340 XRenderColor colfg, colbg;
2341
2342 if(base.mode & ATTR_REVERSE)
2343 temp = fg, fg = bg, bg = temp;
2344
2345 if(base.mode & ATTR_BOLD) {
2346 if(BETWEEN(base.fg, 0, 7)) {
2347 /* basic system colors */
2348 fg = &dc.xft_col[base.fg + 8];
2349 } else if(BETWEEN(base.fg, 16, 195)) {
2350 /* 256 colors */
2351 fg = &dc.xft_col[base.fg + 36];
2352 } else if(BETWEEN(base.fg, 232, 251)) {
2353 /* greyscale */
2354 fg = &dc.xft_col[base.fg + 4];
2355 }
2356 /*
2357 * Those ranges will not be brightened:
2358 * 8 - 15 – bright system colors
2359 * 196 - 231 – highest 256 color cube
2360 * 252 - 255 – brightest colors in greyscale
2361 */
2362 font = &dc.bfont;
2363 }
2364
2365 if(base.mode & ATTR_ITALIC)
2366 font = &dc.ifont;
2367 if(base.mode & (ATTR_ITALIC|ATTR_ITALIC))
2368 font = &dc.ibfont;
2369
2370 if(IS_SET(MODE_REVERSE)) {
2371 if(fg == &dc.xft_col[DefaultFG]) {
2372 fg = &dc.xft_col[DefaultBG];
2373 } else {
2374 colfg.red = ~fg->color.red;
2375 colfg.green = ~fg->color.green;
2376 colfg.blue = ~fg->color.blue;
2377 colfg.alpha = fg->color.alpha;
2378 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2379 fg = &revfg;
2380 }
2381
2382 if(bg == &dc.xft_col[DefaultBG]) {
2383 bg = &dc.xft_col[DefaultFG];
2384 } else {
2385 colbg.red = ~bg->color.red;
2386 colbg.green = ~bg->color.green;
2387 colbg.blue = ~bg->color.blue;
2388 colbg.alpha = bg->color.alpha;
2389 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2390 bg = &revbg;
2391 }
2392 }
2393
2394 XftTextExtentsUtf8(xw.dpy, font->xft_set, (FcChar8 *)s, bytelen,
2395 &extents);
2396 width = extents.xOff;
2397
2398 /* Intelligent cleaning up of the borders. */
2399 if(x == 0) {
2400 xclear(0, (y == 0)? 0 : winy, BORDER,
2401 winy + xw.ch + (y == term.row-1)? xw.h : 0);
2402 }
2403 if(x + charlen >= term.col-1) {
2404 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2405 (y == term.row-1)? xw.h : (winy + xw.ch));
2406 }
2407 if(y == 0)
2408 xclear(winx, 0, winx + width, BORDER);
2409 if(y == term.row-1)
2410 xclear(winx, winy + xw.ch, winx + width, xw.h);
2411
2412 XftDrawRect(xw.xft_draw, bg, winx, winy, width, xw.ch);
2413 XftDrawStringUtf8(xw.xft_draw, fg, font->xft_set, winx,
2414 winy + font->ascent, (FcChar8 *)s, bytelen);
2415
2416 if(base.mode & ATTR_UNDERLINE) {
2417 XftDrawRect(xw.xft_draw, fg, winx, winy + font->ascent + 1,
2418 width, 1);
2419 }
2420 }
2421
2422 void
2423 xdrawcursor(void) {
2424 static int oldx = 0, oldy = 0;
2425 int sl;
2426 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
2427
2428 LIMIT(oldx, 0, term.col-1);
2429 LIMIT(oldy, 0, term.row-1);
2430
2431 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2432 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2433
2434 /* remove the old cursor */
2435 if(term.line[oldy][oldx].state & GLYPH_SET) {
2436 sl = utf8size(term.line[oldy][oldx].c);
2437 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2438 oldy, 1, sl);
2439 } else {
2440 xtermclear(oldx, oldy, oldx, oldy);
2441 }
2442
2443 /* draw the new one */
2444 if(!(term.c.state & CURSOR_HIDE)) {
2445 if(!(xw.state & WIN_FOCUSED))
2446 g.bg = DefaultUCS;
2447
2448 if(IS_SET(MODE_REVERSE))
2449 g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
2450
2451 sl = utf8size(g.c);
2452 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2453 oldx = term.c.x, oldy = term.c.y;
2454 }
2455 }
2456
2457 void
2458 xresettitle(void) {
2459 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
2460 }
2461
2462 void
2463 redraw(void) {
2464 struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
2465
2466 tfulldirt();
2467 draw();
2468 XSync(xw.dpy, False); /* necessary for a good tput flash */
2469 nanosleep(&tv, NULL);
2470 }
2471
2472 void
2473 draw(void) {
2474 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2475
2476 drawregion(0, 0, term.col, term.row);
2477 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2478 }
2479
2480 void
2481 drawregion(int x1, int y1, int x2, int y2) {
2482 int ic, ib, x, y, ox, sl;
2483 Glyph base, new;
2484 char buf[DRAW_BUF_SIZ];
2485 bool ena_sel = sel.bx != -1, alt = IS_SET(MODE_ALTSCREEN);
2486
2487 if((sel.alt && !alt) || (!sel.alt && alt))
2488 ena_sel = 0;
2489 if(!(xw.state & WIN_VISIBLE))
2490 return;
2491
2492 for(y = y1; y < y2; y++) {
2493 if(!term.dirty[y])
2494 continue;
2495
2496 xtermclear(0, y, term.col, y);
2497 term.dirty[y] = 0;
2498 base = term.line[y][0];
2499 ic = ib = ox = 0;
2500 for(x = x1; x < x2; x++) {
2501 new = term.line[y][x];
2502 if(ena_sel && *(new.c) && selected(x, y))
2503 new.mode ^= ATTR_REVERSE;
2504 if(ib > 0 && (!(new.state & GLYPH_SET)
2505 || ATTRCMP(base, new)
2506 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2507 xdraws(buf, base, ox, y, ic, ib);
2508 ic = ib = 0;
2509 }
2510 if(new.state & GLYPH_SET) {
2511 if(ib == 0) {
2512 ox = x;
2513 base = new;
2514 }
2515 sl = utf8size(new.c);
2516 memcpy(buf+ib, new.c, sl);
2517 ib += sl;
2518 ++ic;
2519 }
2520 }
2521 if(ib > 0)
2522 xdraws(buf, base, ox, y, ic, ib);
2523 }
2524 xdrawcursor();
2525 }
2526
2527 void
2528 expose(XEvent *ev) {
2529 XExposeEvent *e = &ev->xexpose;
2530
2531 if(xw.state & WIN_REDRAW) {
2532 if(!e->count)
2533 xw.state &= ~WIN_REDRAW;
2534 }
2535 }
2536
2537 void
2538 visibility(XEvent *ev) {
2539 XVisibilityEvent *e = &ev->xvisibility;
2540
2541 if(e->state == VisibilityFullyObscured) {
2542 xw.state &= ~WIN_VISIBLE;
2543 } else if(!(xw.state & WIN_VISIBLE)) {
2544 /* need a full redraw for next Expose, not just a buf copy */
2545 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2546 }
2547 }
2548
2549 void
2550 unmap(XEvent *ev) {
2551 xw.state &= ~WIN_VISIBLE;
2552 }
2553
2554 void
2555 xseturgency(int add) {
2556 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2557
2558 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2559 XSetWMHints(xw.dpy, xw.win, h);
2560 XFree(h);
2561 }
2562
2563 void
2564 focus(XEvent *ev) {
2565 if(ev->type == FocusIn) {
2566 xw.state |= WIN_FOCUSED;
2567 xseturgency(0);
2568 } else {
2569 xw.state &= ~WIN_FOCUSED;
2570 }
2571 }
2572
2573 char*
2574 kmap(KeySym k, uint state) {
2575 int i;
2576 uint mask;
2577
2578 state &= ~Mod2Mask;
2579 for(i = 0; i < LEN(key); i++) {
2580 mask = key[i].mask;
2581
2582 if(key[i].k == k && ((state & mask) == mask
2583 || (mask == XK_NO_MOD && !state))) {
2584 return (char*)key[i].s;
2585 }
2586 }
2587 return NULL;
2588 }
2589
2590 void
2591 kpress(XEvent *ev) {
2592 XKeyEvent *e = &ev->xkey;
2593 KeySym ksym;
2594 char buf[32];
2595 char *customkey;
2596 int len;
2597 int meta;
2598 int shift;
2599 Status status;
2600
2601 if (IS_SET(MODE_KBDLOCK))
2602 return;
2603
2604 meta = e->state & Mod1Mask;
2605 shift = e->state & ShiftMask;
2606 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
2607
2608 /* 1. custom keys from config.h */
2609 if((customkey = kmap(ksym, e->state))) {
2610 ttywrite(customkey, strlen(customkey));
2611 /* 2. hardcoded (overrides X lookup) */
2612 } else {
2613 switch(ksym) {
2614 case XK_Up:
2615 case XK_Down:
2616 case XK_Left:
2617 case XK_Right:
2618 /* XXX: shift up/down doesn't work */
2619 sprintf(buf, "\033%c%c",
2620 IS_SET(MODE_APPKEYPAD) ? 'O' : '[',
2621 (shift ? "dacb":"DACB")[ksym - XK_Left]);
2622 ttywrite(buf, 3);
2623 break;
2624 case XK_Insert:
2625 if(shift)
2626 selpaste();
2627 break;
2628 case XK_Return:
2629 if(IS_SET(MODE_CRLF)) {
2630 ttywrite("\r\n", 2);
2631 } else {
2632 ttywrite("\r", 1);
2633 }
2634 break;
2635 /* 3. X lookup */
2636 default:
2637 if(len > 0) {
2638 if(meta && len == 1)
2639 ttywrite("\033", 1);
2640 ttywrite(buf, len);
2641 }
2642 break;
2643 }
2644 }
2645 }
2646
2647 void
2648 cmessage(XEvent *e) {
2649 /* See xembed specs
2650 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2651 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2652 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2653 xw.state |= WIN_FOCUSED;
2654 xseturgency(0);
2655 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2656 xw.state &= ~WIN_FOCUSED;
2657 }
2658 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
2659 /* Send SIGHUP to shell */
2660 kill(pid, SIGHUP);
2661 exit(EXIT_SUCCESS);
2662 }
2663 }
2664
2665 void
2666 resize(XEvent *e) {
2667 int col, row;
2668
2669 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2670 return;
2671
2672 xw.w = e->xconfigure.width;
2673 xw.h = e->xconfigure.height;
2674 col = (xw.w - 2*BORDER) / xw.cw;
2675 row = (xw.h - 2*BORDER) / xw.ch;
2676 if(col == term.col && row == term.row)
2677 return;
2678
2679 tresize(col, row);
2680 xresize(col, row);
2681 ttyresize();
2682 }
2683
2684 void
2685 run(void) {
2686 XEvent ev;
2687 fd_set rfd;
2688 int xfd = XConnectionNumber(xw.dpy), i;
2689 struct timeval drawtimeout, *tv = NULL;
2690
2691 for(i = 0;; i++) {
2692 FD_ZERO(&rfd);
2693 FD_SET(cmdfd, &rfd);
2694 FD_SET(xfd, &rfd);
2695 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
2696 if(errno == EINTR)
2697 continue;
2698 die("select failed: %s\n", SERRNO);
2699 }
2700
2701 /*
2702 * Stop after a certain number of reads so the user does not
2703 * feel like the system is stuttering.
2704 */
2705 if(i < 1000 && FD_ISSET(cmdfd, &rfd)) {
2706 ttyread();
2707
2708 /*
2709 * Just wait a bit so it isn't disturbing the
2710 * user and the system is able to write something.
2711 */
2712 drawtimeout.tv_sec = 0;
2713 drawtimeout.tv_usec = 5;
2714 tv = &drawtimeout;
2715 continue;
2716 }
2717 i = 0;
2718 tv = NULL;
2719
2720 while(XPending(xw.dpy)) {
2721 XNextEvent(xw.dpy, &ev);
2722 if(XFilterEvent(&ev, xw.win))
2723 continue;
2724 if(handler[ev.type])
2725 (handler[ev.type])(&ev);
2726 }
2727
2728 draw();
2729 XFlush(xw.dpy);
2730 }
2731 }
2732
2733 int
2734 main(int argc, char *argv[]) {
2735 int i, bitm, xr, yr;
2736 uint wr, hr;
2737
2738 xw.fw = xw.fh = xw.fx = xw.fy = 0;
2739 xw.isfixed = False;
2740
2741 for(i = 1; i < argc; i++) {
2742 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2743 case 'c':
2744 if(++i < argc)
2745 opt_class = argv[i];
2746 break;
2747 case 'e':
2748 /* eat every remaining arguments */
2749 if(++i < argc)
2750 opt_cmd = &argv[i];
2751 goto run;
2752 case 'f':
2753 if(++i < argc)
2754 opt_font = argv[i];
2755 break;
2756 case 'g':
2757 if(++i >= argc)
2758 break;
2759
2760 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
2761 if(bitm & XValue)
2762 xw.fx = xr;
2763 if(bitm & YValue)
2764 xw.fy = yr;
2765 if(bitm & WidthValue)
2766 xw.fw = (int)wr;
2767 if(bitm & HeightValue)
2768 xw.fh = (int)hr;
2769 if(bitm & XNegative && xw.fx == 0)
2770 xw.fx = -1;
2771 if(bitm & XNegative && xw.fy == 0)
2772 xw.fy = -1;
2773
2774 if(xw.fh != 0 && xw.fw != 0)
2775 xw.isfixed = True;
2776 break;
2777 case 'o':
2778 if(++i < argc)
2779 opt_io = argv[i];
2780 break;
2781 case 't':
2782 if(++i < argc)
2783 opt_title = argv[i];
2784 break;
2785 case 'v':
2786 default:
2787 die(USAGE);
2788 case 'w':
2789 if(++i < argc)
2790 opt_embed = argv[i];
2791 break;
2792 }
2793 }
2794
2795 run:
2796 setlocale(LC_CTYPE, "");
2797 tnew(80, 24);
2798 ttynew();
2799 xinit();
2800 selinit();
2801 run();
2802 return 0;
2803 }
2804