Xinqi Bao's Git

projects / st.git / blob


f6c9f18d400085ddc2c1ab3c2d60a2e7ddb5cbe9
[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 enum glyph_attribute {
76 ATTR_NULL = 0,
77 ATTR_REVERSE = 1,
78 ATTR_UNDERLINE = 2,
79 ATTR_BOLD = 4,
80 ATTR_GFX = 8,
81 ATTR_ITALIC = 16,
82 ATTR_BLINK = 32,
83 };
84
85 enum cursor_movement {
86 CURSOR_UP,
87 CURSOR_DOWN,
88 CURSOR_LEFT,
89 CURSOR_RIGHT,
90 CURSOR_SAVE,
91 CURSOR_LOAD
92 };
93
94 enum cursor_state {
95 CURSOR_DEFAULT = 0,
96 CURSOR_HIDE = 1,
97 CURSOR_WRAPNEXT = 2
98 };
99
100 enum glyph_state {
101 GLYPH_SET = 1,
102 GLYPH_DIRTY = 2
103 };
104
105 enum term_mode {
106 MODE_WRAP = 1,
107 MODE_INSERT = 2,
108 MODE_APPKEYPAD = 4,
109 MODE_ALTSCREEN = 8,
110 MODE_CRLF = 16,
111 MODE_MOUSEBTN = 32,
112 MODE_MOUSEMOTION = 64,
113 MODE_MOUSE = 32|64,
114 MODE_REVERSE = 128,
115 MODE_KBDLOCK = 256
116 };
117
118 enum escape_state {
119 ESC_START = 1,
120 ESC_CSI = 2,
121 ESC_STR = 4, /* DSC, OSC, PM, APC */
122 ESC_ALTCHARSET = 8,
123 ESC_STR_END = 16, /* a final string was encountered */
124 };
125
126 enum window_state {
127 WIN_VISIBLE = 1,
128 WIN_REDRAW = 2,
129 WIN_FOCUSED = 4
130 };
131
132 /* bit macro */
133 #undef B0
134 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
135
136 typedef unsigned char uchar;
137 typedef unsigned int uint;
138 typedef unsigned long ulong;
139 typedef unsigned short ushort;
140
141 typedef struct {
142 char c[UTF_SIZ]; /* character code */
143 uchar mode; /* attribute flags */
144 ushort fg; /* foreground */
145 ushort bg; /* background */
146 uchar state; /* state flags */
147 } Glyph;
148
149 typedef Glyph* Line;
150
151 typedef struct {
152 Glyph attr; /* current char attributes */
153 int x;
154 int y;
155 char state;
156 } TCursor;
157
158 /* CSI Escape sequence structs */
159 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
160 typedef struct {
161 char buf[ESC_BUF_SIZ]; /* raw string */
162 int len; /* raw string length */
163 char priv;
164 int arg[ESC_ARG_SIZ];
165 int narg; /* nb of args */
166 char mode;
167 } CSIEscape;
168
169 /* STR Escape sequence structs */
170 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
171 typedef struct {
172 char type; /* ESC type ... */
173 char buf[STR_BUF_SIZ]; /* raw string */
174 int len; /* raw string length */
175 char *args[STR_ARG_SIZ];
176 int narg; /* nb of args */
177 } STREscape;
178
179 /* Internal representation of the screen */
180 typedef struct {
181 int row; /* nb row */
182 int col; /* nb col */
183 Line *line; /* screen */
184 Line *alt; /* alternate screen */
185 bool *dirty; /* dirtyness of lines */
186 TCursor c; /* cursor */
187 int top; /* top scroll limit */
188 int bot; /* bottom scroll limit */
189 int mode; /* terminal mode flags */
190 int esc; /* escape state flags */
191 bool *tabs;
192 } Term;
193
194 /* Purely graphic info */
195 typedef struct {
196 Display* dpy;
197 Colormap cmap;
198 Window win;
199 XdbeBackBuffer buf;
200 Atom xembed, wmdeletewin;
201 XIM xim;
202 XIC xic;
203 XftDraw *xft_draw;
204 Visual *vis;
205 int scr;
206 bool isfixed; /* is fixed geometry? */
207 int fx, fy, fw, fh; /* fixed geometry */
208 int tw, th; /* tty width and height */
209 int w; /* window width */
210 int h; /* window height */
211 int ch; /* char height */
212 int cw; /* char width */
213 char state; /* focus, redraw, visible */
214 } XWindow;
215
216 typedef struct {
217 KeySym k;
218 uint mask;
219 char s[ESC_BUF_SIZ];
220 } Key;
221
222 /* TODO: use better name for vars... */
223 typedef struct {
224 int mode;
225 int bx, by;
226 int ex, ey;
227 struct {int x, y;} b, e;
228 char *clip;
229 Atom xtarget;
230 bool alt;
231 struct timeval tclick1;
232 struct timeval tclick2;
233 } Selection;
234
235 #include "config.h"
236
237 /* Font structure */
238 typedef struct {
239 int height;
240 int width;
241 int ascent;
242 int descent;
243 short lbearing;
244 short rbearing;
245 XftFont *xft_set;
246 } Font;
247
248 /* Drawing Context */
249 typedef struct {
250 XftColor xft_col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
251 GC gc;
252 Font font, bfont, ifont, ibfont;
253 } DC;
254
255 static void die(const char *, ...);
256 static void draw(void);
257 static void redraw(void);
258 static void drawregion(int, int, int, int);
259 static void execsh(void);
260 static void sigchld(int);
261 static void run(void);
262
263 static void csidump(void);
264 static void csihandle(void);
265 static void csiparse(void);
266 static void csireset(void);
267 static void strdump(void);
268 static void strhandle(void);
269 static void strparse(void);
270 static void strreset(void);
271
272 static void tclearregion(int, int, int, int);
273 static void tcursor(int);
274 static void tdeletechar(int);
275 static void tdeleteline(int);
276 static void tinsertblank(int);
277 static void tinsertblankline(int);
278 static void tmoveto(int, int);
279 static void tnew(int, int);
280 static void tnewline(int);
281 static void tputtab(bool);
282 static void tputc(char *, int);
283 static void treset(void);
284 static int tresize(int, int);
285 static void tscrollup(int, int);
286 static void tscrolldown(int, int);
287 static void tsetattr(int*, int);
288 static void tsetchar(char*);
289 static void tsetscroll(int, int);
290 static void tswapscreen(void);
291 static void tsetdirt(int, int);
292 static void tsetmode(bool, bool, int *, int);
293 static void tfulldirt(void);
294
295 static void ttynew(void);
296 static void ttyread(void);
297 static void ttyresize(void);
298 static void ttywrite(const char *, size_t);
299
300 static void xdraws(char *, Glyph, int, int, int, int);
301 static void xhints(void);
302 static void xclear(int, int, int, int);
303 static void xclearborders(void);
304 static void xdrawcursor(void);
305 static void xinit(void);
306 static void xloadcols(void);
307 static void xresettitle(void);
308 static void xseturgency(int);
309 static void xsetsel(char*);
310 static void xtermclear(int, int, int, int);
311 static void xresize(int, int);
312
313 static void expose(XEvent *);
314 static void visibility(XEvent *);
315 static void unmap(XEvent *);
316 static char *kmap(KeySym, uint);
317 static void kpress(XEvent *);
318 static void cmessage(XEvent *);
319 static void resize(XEvent *);
320 static void focus(XEvent *);
321 static void brelease(XEvent *);
322 static void bpress(XEvent *);
323 static void bmotion(XEvent *);
324 static void selnotify(XEvent *);
325 static void selclear(XEvent *);
326 static void selrequest(XEvent *);
327
328 static void selinit(void);
329 static inline bool selected(int, int);
330 static void selcopy(void);
331 static void selpaste(void);
332 static void selscroll(int, int);
333
334 static int utf8decode(char *, long *);
335 static int utf8encode(long *, char *);
336 static int utf8size(char *);
337 static int isfullutf8(char *, int);
338
339 static void *xmalloc(size_t);
340 static void *xrealloc(void *, size_t);
341 static void *xcalloc(size_t nmemb, size_t size);
342 static char *smstrcat(char *, ...);
343
344 static void (*handler[LASTEvent])(XEvent *) = {
345 [KeyPress] = kpress,
346 [ClientMessage] = cmessage,
347 [ConfigureNotify] = resize,
348 [VisibilityNotify] = visibility,
349 [UnmapNotify] = unmap,
350 [Expose] = expose,
351 [FocusIn] = focus,
352 [FocusOut] = focus,
353 [MotionNotify] = bmotion,
354 [ButtonPress] = bpress,
355 [ButtonRelease] = brelease,
356 [SelectionClear] = selclear,
357 [SelectionNotify] = selnotify,
358 [SelectionRequest] = selrequest,
359 };
360
361 /* Globals */
362 static DC dc;
363 static XWindow xw;
364 static Term term;
365 static CSIEscape csiescseq;
366 static STREscape strescseq;
367 static int cmdfd;
368 static pid_t pid;
369 static Selection sel;
370 static int iofd = -1;
371 static char **opt_cmd = NULL;
372 static char *opt_io = NULL;
373 static char *opt_title = NULL;
374 static char *opt_embed = NULL;
375 static char *opt_class = NULL;
376 static char *opt_font = NULL;
377
378 void *
379 xmalloc(size_t len) {
380 void *p = malloc(len);
381
382 if(!p)
383 die("Out of memory\n");
384
385 return p;
386 }
387
388 void *
389 xrealloc(void *p, size_t len) {
390 if((p = realloc(p, len)) == NULL)
391 die("Out of memory\n");
392
393 return p;
394 }
395
396 void *
397 xcalloc(size_t nmemb, size_t size) {
398 void *p = calloc(nmemb, size);
399
400 if(!p)
401 die("Out of memory\n");
402
403 return p;
404 }
405
406 char *
407 smstrcat(char *src, ...)
408 {
409 va_list fmtargs;
410 char *ret, *p, *v;
411 int len, slen, flen;
412
413 len = slen = strlen(src);
414
415 va_start(fmtargs, src);
416 for(;;) {
417 v = va_arg(fmtargs, char *);
418 if(v == NULL)
419 break;
420 len += strlen(v);
421 }
422 va_end(fmtargs);
423
424 p = ret = xmalloc(len+1);
425 memmove(p, src, slen);
426 p += slen;
427
428 va_start(fmtargs, src);
429 for(;;) {
430 v = va_arg(fmtargs, char *);
431 if(v == NULL)
432 break;
433 flen = strlen(v);
434 memmove(p, v, flen);
435 p += flen;
436 }
437 va_end(fmtargs);
438
439 ret[len] = '\0';
440
441 return ret;
442 }
443
444 int
445 utf8decode(char *s, long *u) {
446 uchar c;
447 int i, n, rtn;
448
449 rtn = 1;
450 c = *s;
451 if(~c & B7) { /* 0xxxxxxx */
452 *u = c;
453 return rtn;
454 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
455 *u = c&(B4|B3|B2|B1|B0);
456 n = 1;
457 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
458 *u = c&(B3|B2|B1|B0);
459 n = 2;
460 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
461 *u = c & (B2|B1|B0);
462 n = 3;
463 } else {
464 goto invalid;
465 }
466
467 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
468 c = *s;
469 if((c & (B7|B6)) != B7) /* 10xxxxxx */
470 goto invalid;
471 *u <<= 6;
472 *u |= c & (B5|B4|B3|B2|B1|B0);
473 }
474
475 if((n == 1 && *u < 0x80) ||
476 (n == 2 && *u < 0x800) ||
477 (n == 3 && *u < 0x10000) ||
478 (*u >= 0xD800 && *u <= 0xDFFF)) {
479 goto invalid;
480 }
481
482 return rtn;
483 invalid:
484 *u = 0xFFFD;
485
486 return rtn;
487 }
488
489 int
490 utf8encode(long *u, char *s) {
491 uchar *sp;
492 ulong uc;
493 int i, n;
494
495 sp = (uchar *)s;
496 uc = *u;
497 if(uc < 0x80) {
498 *sp = uc; /* 0xxxxxxx */
499 return 1;
500 } else if(*u < 0x800) {
501 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
502 n = 1;
503 } else if(uc < 0x10000) {
504 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
505 n = 2;
506 } else if(uc <= 0x10FFFF) {
507 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
508 n = 3;
509 } else {
510 goto invalid;
511 }
512
513 for(i=n,++sp; i>0; --i,++sp)
514 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
515
516 return n+1;
517 invalid:
518 /* U+FFFD */
519 *s++ = '\xEF';
520 *s++ = '\xBF';
521 *s = '\xBD';
522
523 return 3;
524 }
525
526 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
527 UTF-8 otherwise return 0 */
528 int
529 isfullutf8(char *s, int b) {
530 uchar *c1, *c2, *c3;
531
532 c1 = (uchar *)s;
533 c2 = (uchar *)++s;
534 c3 = (uchar *)++s;
535 if(b < 1) {
536 return 0;
537 } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
538 return 0;
539 } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
540 ((b == 1) ||
541 ((b == 2) && (*c2&(B7|B6)) == B7))) {
542 return 0;
543 } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
544 ((b == 1) ||
545 ((b == 2) && (*c2&(B7|B6)) == B7) ||
546 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
547 return 0;
548 } else {
549 return 1;
550 }
551 }
552
553 int
554 utf8size(char *s) {
555 uchar c = *s;
556
557 if(~c&B7) {
558 return 1;
559 } else if((c&(B7|B6|B5)) == (B7|B6)) {
560 return 2;
561 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
562 return 3;
563 } else {
564 return 4;
565 }
566 }
567
568 void
569 selinit(void) {
570 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
571 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
572 sel.mode = 0;
573 sel.bx = -1;
574 sel.clip = NULL;
575 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
576 if(sel.xtarget == None)
577 sel.xtarget = XA_STRING;
578 }
579
580 static inline bool
581 selected(int x, int y) {
582 int bx, ex;
583
584 if(sel.ey == y && sel.by == y) {
585 bx = MIN(sel.bx, sel.ex);
586 ex = MAX(sel.bx, sel.ex);
587 return BETWEEN(x, bx, ex);
588 }
589
590 return ((sel.b.y < y&&y < sel.e.y)
591 || (y==sel.e.y && x<=sel.e.x))
592 || (y==sel.b.y && x>=sel.b.x
593 && (x<=sel.e.x || sel.b.y!=sel.e.y));
594 }
595
596 void
597 getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
598 if(b)
599 *b = e->xbutton.button;
600
601 *x = X2COL(e->xbutton.x);
602 *y = Y2ROW(e->xbutton.y);
603 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
604 sel.b.y = MIN(sel.by, sel.ey);
605 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
606 sel.e.y = MAX(sel.by, sel.ey);
607 }
608
609 void
610 mousereport(XEvent *e) {
611 int x = X2COL(e->xbutton.x);
612 int y = Y2ROW(e->xbutton.y);
613 int button = e->xbutton.button;
614 int state = e->xbutton.state;
615 char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
616 static int ob, ox, oy;
617
618 /* from urxvt */
619 if(e->xbutton.type == MotionNotify) {
620 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
621 return;
622 button = ob + 32;
623 ox = x, oy = y;
624 } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
625 button = 3;
626 } else {
627 button -= Button1;
628 if(button >= 3)
629 button += 64 - 3;
630 if(e->xbutton.type == ButtonPress) {
631 ob = button;
632 ox = x, oy = y;
633 }
634 }
635
636 buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
637 + (state & Mod4Mask ? 8 : 0)
638 + (state & ControlMask ? 16 : 0);
639
640 ttywrite(buf, sizeof(buf));
641 }
642
643 void
644 bpress(XEvent *e) {
645 if(IS_SET(MODE_MOUSE)) {
646 mousereport(e);
647 } else if(e->xbutton.button == Button1) {
648 if(sel.bx != -1) {
649 sel.bx = -1;
650 tsetdirt(sel.b.y, sel.e.y);
651 draw();
652 }
653 sel.mode = 1;
654 sel.ex = sel.bx = X2COL(e->xbutton.x);
655 sel.ey = sel.by = Y2ROW(e->xbutton.y);
656 }
657 }
658
659 void
660 selcopy(void) {
661 char *str, *ptr, *p;
662 int x, y, bufsize, is_selected = 0, size;
663 Glyph *gp;
664
665 if(sel.bx == -1) {
666 str = NULL;
667 } else {
668 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
669 ptr = str = xmalloc(bufsize);
670
671 /* append every set & selected glyph to the selection */
672 for(y = 0; y < term.row; y++) {
673 for(x = 0; x < term.col; x++) {
674 gp = &term.line[y][x];
675
676 if(!(is_selected = selected(x, y)))
677 continue;
678 p = (gp->state & GLYPH_SET) ? gp->c : " ";
679 size = utf8size(p);
680 memcpy(ptr, p, size);
681 ptr += size;
682 }
683 /* \n at the end of every selected line except for the last one */
684 if(is_selected && y < sel.e.y)
685 *ptr++ = '\n';
686 }
687 *ptr = 0;
688 }
689 sel.alt = IS_SET(MODE_ALTSCREEN);
690 xsetsel(str);
691 }
692
693 void
694 selnotify(XEvent *e) {
695 ulong nitems, ofs, rem;
696 int format;
697 uchar *data;
698 Atom type;
699
700 ofs = 0;
701 do {
702 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
703 False, AnyPropertyType, &type, &format,
704 &nitems, &rem, &data)) {
705 fprintf(stderr, "Clipboard allocation failed\n");
706 return;
707 }
708 ttywrite((const char *) data, nitems * format / 8);
709 XFree(data);
710 /* number of 32-bit chunks returned */
711 ofs += nitems * format / 32;
712 } while(rem > 0);
713 }
714
715 void
716 selpaste(void) {
717 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
718 xw.win, CurrentTime);
719 }
720
721 void selclear(XEvent *e) {
722 if(sel.bx == -1)
723 return;
724 sel.bx = -1;
725 tsetdirt(sel.b.y, sel.e.y);
726 }
727
728 void
729 selrequest(XEvent *e) {
730 XSelectionRequestEvent *xsre;
731 XSelectionEvent xev;
732 Atom xa_targets, string;
733
734 xsre = (XSelectionRequestEvent *) e;
735 xev.type = SelectionNotify;
736 xev.requestor = xsre->requestor;
737 xev.selection = xsre->selection;
738 xev.target = xsre->target;
739 xev.time = xsre->time;
740 /* reject */
741 xev.property = None;
742
743 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
744 if(xsre->target == xa_targets) {
745 /* respond with the supported type */
746 string = sel.xtarget;
747 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
748 XA_ATOM, 32, PropModeReplace,
749 (uchar *) &string, 1);
750 xev.property = xsre->property;
751 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
752 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
753 xsre->target, 8, PropModeReplace,
754 (uchar *) sel.clip, strlen(sel.clip));
755 xev.property = xsre->property;
756 }
757
758 /* all done, send a notification to the listener */
759 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
760 fprintf(stderr, "Error sending SelectionNotify event\n");
761 }
762
763 void
764 xsetsel(char *str) {
765 /* register the selection for both the clipboard and the primary */
766 Atom clipboard;
767
768 free(sel.clip);
769 sel.clip = str;
770
771 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
772
773 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
774 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
775 }
776
777 void
778 brelease(XEvent *e) {
779 struct timeval now;
780
781 if(IS_SET(MODE_MOUSE)) {
782 mousereport(e);
783 return;
784 }
785
786 if(e->xbutton.button == Button2) {
787 selpaste();
788 } else if(e->xbutton.button == Button1) {
789 sel.mode = 0;
790 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
791 term.dirty[sel.ey] = 1;
792 if(sel.bx == sel.ex && sel.by == sel.ey) {
793 sel.bx = -1;
794 gettimeofday(&now, NULL);
795
796 if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
797 /* triple click on the line */
798 sel.b.x = sel.bx = 0;
799 sel.e.x = sel.ex = term.col;
800 sel.b.y = sel.e.y = sel.ey;
801 selcopy();
802 } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
803 /* double click to select word */
804 sel.bx = sel.ex;
805 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
806 term.line[sel.ey][sel.bx-1].c[0] != ' ') {
807 sel.bx--;
808 }
809 sel.b.x = sel.bx;
810 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
811 term.line[sel.ey][sel.ex+1].c[0] != ' ') {
812 sel.ex++;
813 }
814 sel.e.x = sel.ex;
815 sel.b.y = sel.e.y = sel.ey;
816 selcopy();
817 }
818 } else {
819 selcopy();
820 }
821 }
822
823 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
824 gettimeofday(&sel.tclick1, NULL);
825 }
826
827 void
828 bmotion(XEvent *e) {
829 int starty, endy, oldey, oldex;
830
831 if(IS_SET(MODE_MOUSE)) {
832 mousereport(e);
833 return;
834 }
835
836 if(sel.mode) {
837 oldey = sel.ey;
838 oldex = sel.ex;
839 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
840
841 if(oldey != sel.ey || oldex != sel.ex) {
842 starty = MIN(oldey, sel.ey);
843 endy = MAX(oldey, sel.ey);
844 tsetdirt(starty, endy);
845 }
846 }
847 }
848
849 void
850 die(const char *errstr, ...) {
851 va_list ap;
852
853 va_start(ap, errstr);
854 vfprintf(stderr, errstr, ap);
855 va_end(ap);
856 exit(EXIT_FAILURE);
857 }
858
859 void
860 execsh(void) {
861 char **args;
862 char *envshell = getenv("SHELL");
863
864 unsetenv("COLUMNS");
865 unsetenv("LINES");
866 unsetenv("TERMCAP");
867
868 signal(SIGCHLD, SIG_DFL);
869 signal(SIGHUP, SIG_DFL);
870 signal(SIGINT, SIG_DFL);
871 signal(SIGQUIT, SIG_DFL);
872 signal(SIGTERM, SIG_DFL);
873 signal(SIGALRM, SIG_DFL);
874
875 DEFAULT(envshell, SHELL);
876 putenv("TERM="TNAME);
877 args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
878 execvp(args[0], args);
879 exit(EXIT_FAILURE);
880 }
881
882 void
883 sigchld(int a) {
884 int stat = 0;
885
886 if(waitpid(pid, &stat, 0) < 0)
887 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
888
889 if(WIFEXITED(stat)) {
890 exit(WEXITSTATUS(stat));
891 } else {
892 exit(EXIT_FAILURE);
893 }
894 }
895
896 void
897 ttynew(void) {
898 int m, s;
899 struct winsize w = {term.row, term.col, 0, 0};
900
901 /* seems to work fine on linux, openbsd and freebsd */
902 if(openpty(&m, &s, NULL, NULL, &w) < 0)
903 die("openpty failed: %s\n", SERRNO);
904
905 switch(pid = fork()) {
906 case -1:
907 die("fork failed\n");
908 break;
909 case 0:
910 setsid(); /* create a new process group */
911 dup2(s, STDIN_FILENO);
912 dup2(s, STDOUT_FILENO);
913 dup2(s, STDERR_FILENO);
914 if(ioctl(s, TIOCSCTTY, NULL) < 0)
915 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
916 close(s);
917 close(m);
918 execsh();
919 break;
920 default:
921 close(s);
922 cmdfd = m;
923 signal(SIGCHLD, sigchld);
924 if(opt_io) {
925 if(!strcmp(opt_io, "-")) {
926 iofd = STDOUT_FILENO;
927 } else {
928 if((iofd = open(opt_io, O_WRONLY | O_CREAT, 0666)) < 0) {
929 fprintf(stderr, "Error opening %s:%s\n",
930 opt_io, strerror(errno));
931 }
932 }
933 }
934 }
935 }
936
937 void
938 dump(char c) {
939 static int col;
940
941 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
942 if(++col % 10 == 0)
943 fprintf(stderr, "\n");
944 }
945
946 void
947 ttyread(void) {
948 static char buf[BUFSIZ];
949 static int buflen = 0;
950 char *ptr;
951 char s[UTF_SIZ];
952 int charsize; /* size of utf8 char in bytes */
953 long utf8c;
954 int ret;
955
956 /* append read bytes to unprocessed bytes */
957 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
958 die("Couldn't read from shell: %s\n", SERRNO);
959
960 /* process every complete utf8 char */
961 buflen += ret;
962 ptr = buf;
963 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
964 charsize = utf8decode(ptr, &utf8c);
965 utf8encode(&utf8c, s);
966 tputc(s, charsize);
967 ptr += charsize;
968 buflen -= charsize;
969 }
970
971 /* keep any uncomplete utf8 char for the next call */
972 memmove(buf, ptr, buflen);
973 }
974
975 void
976 ttywrite(const char *s, size_t n) {
977 if(write(cmdfd, s, n) == -1)
978 die("write error on tty: %s\n", SERRNO);
979 }
980
981 void
982 ttyresize(void) {
983 struct winsize w;
984
985 w.ws_row = term.row;
986 w.ws_col = term.col;
987 w.ws_xpixel = xw.tw;
988 w.ws_ypixel = xw.th;
989 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
990 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
991 }
992
993 void
994 tsetdirt(int top, int bot) {
995 int i;
996
997 LIMIT(top, 0, term.row-1);
998 LIMIT(bot, 0, term.row-1);
999
1000 for(i = top; i <= bot; i++)
1001 term.dirty[i] = 1;
1002 }
1003
1004 void
1005 tfulldirt(void) {
1006 tsetdirt(0, term.row-1);
1007 }
1008
1009 void
1010 tcursor(int mode) {
1011 static TCursor c;
1012
1013 if(mode == CURSOR_SAVE) {
1014 c = term.c;
1015 } else if(mode == CURSOR_LOAD) {
1016 term.c = c;
1017 tmoveto(c.x, c.y);
1018 }
1019 }
1020
1021 void
1022 treset(void) {
1023 uint i;
1024
1025 term.c = (TCursor){{
1026 .mode = ATTR_NULL,
1027 .fg = DefaultFG,
1028 .bg = DefaultBG
1029 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1030
1031 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1032 for(i = TAB; i < term.col; i += TAB)
1033 term.tabs[i] = 1;
1034 term.top = 0, term.bot = term.row - 1;
1035 term.mode = MODE_WRAP;
1036
1037 tclearregion(0, 0, term.col-1, term.row-1);
1038 }
1039
1040 void
1041 tnew(int col, int row) {
1042 /* set screen size */
1043 term.row = row, term.col = col;
1044 term.line = xmalloc(term.row * sizeof(Line));
1045 term.alt = xmalloc(term.row * sizeof(Line));
1046 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
1047 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
1048
1049 for(row = 0; row < term.row; row++) {
1050 term.line[row] = xmalloc(term.col * sizeof(Glyph));
1051 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
1052 term.dirty[row] = 0;
1053 }
1054 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1055 /* setup screen */
1056 treset();
1057 }
1058
1059 void
1060 tswapscreen(void) {
1061 Line *tmp = term.line;
1062
1063 term.line = term.alt;
1064 term.alt = tmp;
1065 term.mode ^= MODE_ALTSCREEN;
1066 tfulldirt();
1067 }
1068
1069 void
1070 tscrolldown(int orig, int n) {
1071 int i;
1072 Line temp;
1073
1074 LIMIT(n, 0, term.bot-orig+1);
1075
1076 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1077
1078 for(i = term.bot; i >= orig+n; i--) {
1079 temp = term.line[i];
1080 term.line[i] = term.line[i-n];
1081 term.line[i-n] = temp;
1082
1083 term.dirty[i] = 1;
1084 term.dirty[i-n] = 1;
1085 }
1086
1087 selscroll(orig, n);
1088 }
1089
1090 void
1091 tscrollup(int orig, int n) {
1092 int i;
1093 Line temp;
1094 LIMIT(n, 0, term.bot-orig+1);
1095
1096 tclearregion(0, orig, term.col-1, orig+n-1);
1097
1098 for(i = orig; i <= term.bot-n; i++) {
1099 temp = term.line[i];
1100 term.line[i] = term.line[i+n];
1101 term.line[i+n] = temp;
1102
1103 term.dirty[i] = 1;
1104 term.dirty[i+n] = 1;
1105 }
1106
1107 selscroll(orig, -n);
1108 }
1109
1110 void
1111 selscroll(int orig, int n) {
1112 if(sel.bx == -1)
1113 return;
1114
1115 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1116 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1117 sel.bx = -1;
1118 return;
1119 }
1120 if(sel.by < term.top) {
1121 sel.by = term.top;
1122 sel.bx = 0;
1123 }
1124 if(sel.ey > term.bot) {
1125 sel.ey = term.bot;
1126 sel.ex = term.col;
1127 }
1128 sel.b.y = sel.by, sel.b.x = sel.bx;
1129 sel.e.y = sel.ey, sel.e.x = sel.ex;
1130 }
1131 }
1132
1133 void
1134 tnewline(int first_col) {
1135 int y = term.c.y;
1136
1137 if(y == term.bot) {
1138 tscrollup(term.top, 1);
1139 } else {
1140 y++;
1141 }
1142 tmoveto(first_col ? 0 : term.c.x, y);
1143 }
1144
1145 void
1146 csiparse(void) {
1147 /* int noarg = 1; */
1148 char *p = csiescseq.buf;
1149
1150 csiescseq.narg = 0;
1151 if(*p == '?')
1152 csiescseq.priv = 1, p++;
1153
1154 while(p < csiescseq.buf+csiescseq.len) {
1155 while(isdigit(*p)) {
1156 csiescseq.arg[csiescseq.narg] *= 10;
1157 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1158 }
1159 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ) {
1160 csiescseq.narg++, p++;
1161 } else {
1162 csiescseq.mode = *p;
1163 csiescseq.narg++;
1164
1165 return;
1166 }
1167 }
1168 }
1169
1170 void
1171 tmoveto(int x, int y) {
1172 LIMIT(x, 0, term.col-1);
1173 LIMIT(y, 0, term.row-1);
1174 term.c.state &= ~CURSOR_WRAPNEXT;
1175 term.c.x = x;
1176 term.c.y = y;
1177 }
1178
1179 void
1180 tsetchar(char *c) {
1181 char *vt100_0[62] = { /* 0x41 - 0x7e */
1182 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1183 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1184 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1185 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1186 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1187 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1188 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1189 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1190 };
1191
1192 /*
1193 * The table is proudly stolen from rxvt.
1194 */
1195 if(term.c.attr.mode & ATTR_GFX) {
1196 if(c[0] >= 0x41 && c[0] <= 0x7e
1197 && vt100_0[c[0] - 0x41]) {
1198 c = vt100_0[c[0] - 0x41];
1199 }
1200 }
1201
1202 term.dirty[term.c.y] = 1;
1203 term.line[term.c.y][term.c.x] = term.c.attr;
1204 memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
1205 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
1206 }
1207
1208 void
1209 tclearregion(int x1, int y1, int x2, int y2) {
1210 int x, y, temp;
1211
1212 if(x1 > x2)
1213 temp = x1, x1 = x2, x2 = temp;
1214 if(y1 > y2)
1215 temp = y1, y1 = y2, y2 = temp;
1216
1217 LIMIT(x1, 0, term.col-1);
1218 LIMIT(x2, 0, term.col-1);
1219 LIMIT(y1, 0, term.row-1);
1220 LIMIT(y2, 0, term.row-1);
1221
1222 for(y = y1; y <= y2; y++) {
1223 term.dirty[y] = 1;
1224 for(x = x1; x <= x2; x++)
1225 term.line[y][x].state = 0;
1226 }
1227 }
1228
1229 void
1230 tdeletechar(int n) {
1231 int src = term.c.x + n;
1232 int dst = term.c.x;
1233 int size = term.col - src;
1234
1235 term.dirty[term.c.y] = 1;
1236
1237 if(src >= term.col) {
1238 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1239 return;
1240 }
1241
1242 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1243 size * sizeof(Glyph));
1244 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1245 }
1246
1247 void
1248 tinsertblank(int n) {
1249 int src = term.c.x;
1250 int dst = src + n;
1251 int size = term.col - dst;
1252
1253 term.dirty[term.c.y] = 1;
1254
1255 if(dst >= term.col) {
1256 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1257 return;
1258 }
1259
1260 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1261 size * sizeof(Glyph));
1262 tclearregion(src, term.c.y, dst - 1, term.c.y);
1263 }
1264
1265 void
1266 tinsertblankline(int n) {
1267 if(term.c.y < term.top || term.c.y > term.bot)
1268 return;
1269
1270 tscrolldown(term.c.y, n);
1271 }
1272
1273 void
1274 tdeleteline(int n) {
1275 if(term.c.y < term.top || term.c.y > term.bot)
1276 return;
1277
1278 tscrollup(term.c.y, n);
1279 }
1280
1281 void
1282 tsetattr(int *attr, int l) {
1283 int i;
1284
1285 for(i = 0; i < l; i++) {
1286 switch(attr[i]) {
1287 case 0:
1288 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1289 | ATTR_ITALIC | ATTR_BLINK);
1290 term.c.attr.fg = DefaultFG;
1291 term.c.attr.bg = DefaultBG;
1292 break;
1293 case 1:
1294 term.c.attr.mode |= ATTR_BOLD;
1295 break;
1296 case 3: /* enter standout (highlight) */
1297 term.c.attr.mode |= ATTR_ITALIC;
1298 break;
1299 case 4:
1300 term.c.attr.mode |= ATTR_UNDERLINE;
1301 break;
1302 case 5:
1303 term.c.attr.mode |= ATTR_BLINK;
1304 break;
1305 case 7:
1306 term.c.attr.mode |= ATTR_REVERSE;
1307 break;
1308 case 21:
1309 case 22:
1310 term.c.attr.mode &= ~ATTR_BOLD;
1311 break;
1312 case 23: /* leave standout (highlight) mode */
1313 term.c.attr.mode &= ~ATTR_ITALIC;
1314 break;
1315 case 24:
1316 term.c.attr.mode &= ~ATTR_UNDERLINE;
1317 break;
1318 case 25:
1319 term.c.attr.mode &= ~ATTR_BLINK;
1320 break;
1321 case 27:
1322 term.c.attr.mode &= ~ATTR_REVERSE;
1323 break;
1324 case 38:
1325 if(i + 2 < l && attr[i + 1] == 5) {
1326 i += 2;
1327 if(BETWEEN(attr[i], 0, 255)) {
1328 term.c.attr.fg = attr[i];
1329 } else {
1330 fprintf(stderr,
1331 "erresc: bad fgcolor %d\n",
1332 attr[i]);
1333 }
1334 } else {
1335 fprintf(stderr,
1336 "erresc(38): gfx attr %d unknown\n",
1337 attr[i]);
1338 }
1339 break;
1340 case 39:
1341 term.c.attr.fg = DefaultFG;
1342 break;
1343 case 48:
1344 if(i + 2 < l && attr[i + 1] == 5) {
1345 i += 2;
1346 if(BETWEEN(attr[i], 0, 255)) {
1347 term.c.attr.bg = attr[i];
1348 } else {
1349 fprintf(stderr,
1350 "erresc: bad bgcolor %d\n",
1351 attr[i]);
1352 }
1353 } else {
1354 fprintf(stderr,
1355 "erresc(48): gfx attr %d unknown\n",
1356 attr[i]);
1357 }
1358 break;
1359 case 49:
1360 term.c.attr.bg = DefaultBG;
1361 break;
1362 default:
1363 if(BETWEEN(attr[i], 30, 37)) {
1364 term.c.attr.fg = attr[i] - 30;
1365 } else if(BETWEEN(attr[i], 40, 47)) {
1366 term.c.attr.bg = attr[i] - 40;
1367 } else if(BETWEEN(attr[i], 90, 97)) {
1368 term.c.attr.fg = attr[i] - 90 + 8;
1369 } else if(BETWEEN(attr[i], 100, 107)) {
1370 term.c.attr.bg = attr[i] - 100 + 8;
1371 } else {
1372 fprintf(stderr,
1373 "erresc(default): gfx attr %d unknown\n",
1374 attr[i]), csidump();
1375 }
1376 break;
1377 }
1378 }
1379 }
1380
1381 void
1382 tsetscroll(int t, int b) {
1383 int temp;
1384
1385 LIMIT(t, 0, term.row-1);
1386 LIMIT(b, 0, term.row-1);
1387 if(t > b) {
1388 temp = t;
1389 t = b;
1390 b = temp;
1391 }
1392 term.top = t;
1393 term.bot = b;
1394 }
1395
1396 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1397
1398 void
1399 tsetmode(bool priv, bool set, int *args, int narg) {
1400 int *lim, mode;
1401
1402 for(lim = args + narg; args < lim; ++args) {
1403 if(priv) {
1404 switch(*args) {
1405 break;
1406 case 1: /* DECCKM -- Cursor key */
1407 MODBIT(term.mode, set, MODE_APPKEYPAD);
1408 break;
1409 case 5: /* DECSCNM -- Reverse video */
1410 mode = term.mode;
1411 MODBIT(term.mode, set, MODE_REVERSE);
1412 if(mode != term.mode)
1413 redraw();
1414 break;
1415 case 6: /* XXX: DECOM -- Origin */
1416 break;
1417 case 7: /* DECAWM -- Auto wrap */
1418 MODBIT(term.mode, set, MODE_WRAP);
1419 break;
1420 case 8: /* XXX: DECARM -- Auto repeat */
1421 break;
1422 case 0: /* Error (IGNORED) */
1423 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1424 break;
1425 case 25:
1426 MODBIT(term.c.state, !set, CURSOR_HIDE);
1427 break;
1428 case 1000: /* 1000,1002: enable xterm mouse report */
1429 MODBIT(term.mode, set, MODE_MOUSEBTN);
1430 break;
1431 case 1002:
1432 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1433 break;
1434 case 1049: /* = 1047 and 1048 */
1435 case 47:
1436 case 1047:
1437 if(IS_SET(MODE_ALTSCREEN))
1438 tclearregion(0, 0, term.col-1, term.row-1);
1439 if((set && !IS_SET(MODE_ALTSCREEN)) ||
1440 (!set && IS_SET(MODE_ALTSCREEN))) {
1441 tswapscreen();
1442 }
1443 if(*args != 1049)
1444 break;
1445 /* pass through */
1446 case 1048:
1447 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1448 break;
1449 default:
1450 /* case 2: DECANM -- ANSI/VT52 (NOT SUPPOURTED) */
1451 /* case 3: DECCOLM -- Column (NOT SUPPORTED) */
1452 /* case 4: DECSCLM -- Scroll (NOT SUPPORTED) */
1453 /* case 18: DECPFF -- Printer feed (NOT SUPPORTED) */
1454 /* case 19: DECPEX -- Printer extent (NOT SUPPORTED) */
1455 /* case 42: DECNRCM -- National characters (NOT SUPPORTED) */
1456 fprintf(stderr,
1457 "erresc: unknown private set/reset mode %d\n",
1458 *args);
1459 break;
1460 }
1461 } else {
1462 switch(*args) {
1463 case 0: /* Error (IGNORED) */
1464 break;
1465 case 2: /* KAM -- keyboard action */
1466 MODBIT(term.mode, set, MODE_KBDLOCK);
1467 break;
1468 case 4: /* IRM -- Insertion-replacement */
1469 MODBIT(term.mode, set, MODE_INSERT);
1470 break;
1471 case 12: /* XXX: SRM -- Send/Receive */
1472 break;
1473 case 20: /* LNM -- Linefeed/new line */
1474 MODBIT(term.mode, set, MODE_CRLF);
1475 break;
1476 default:
1477 fprintf(stderr,
1478 "erresc: unknown set/reset mode %d\n",
1479 *args);
1480 break;
1481 }
1482 }
1483 }
1484 }
1485 #undef MODBIT
1486
1487
1488 void
1489 csihandle(void) {
1490 switch(csiescseq.mode) {
1491 default:
1492 unknown:
1493 fprintf(stderr, "erresc: unknown csi ");
1494 csidump();
1495 /* die(""); */
1496 break;
1497 case '@': /* ICH -- Insert <n> blank char */
1498 DEFAULT(csiescseq.arg[0], 1);
1499 tinsertblank(csiescseq.arg[0]);
1500 break;
1501 case 'A': /* CUU -- Cursor <n> Up */
1502 case 'e':
1503 DEFAULT(csiescseq.arg[0], 1);
1504 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1505 break;
1506 case 'B': /* CUD -- Cursor <n> Down */
1507 DEFAULT(csiescseq.arg[0], 1);
1508 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1509 break;
1510 case 'C': /* CUF -- Cursor <n> Forward */
1511 case 'a':
1512 DEFAULT(csiescseq.arg[0], 1);
1513 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1514 break;
1515 case 'D': /* CUB -- Cursor <n> Backward */
1516 DEFAULT(csiescseq.arg[0], 1);
1517 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1518 break;
1519 case 'E': /* CNL -- Cursor <n> Down and first col */
1520 DEFAULT(csiescseq.arg[0], 1);
1521 tmoveto(0, term.c.y+csiescseq.arg[0]);
1522 break;
1523 case 'F': /* CPL -- Cursor <n> Up and first col */
1524 DEFAULT(csiescseq.arg[0], 1);
1525 tmoveto(0, term.c.y-csiescseq.arg[0]);
1526 break;
1527 case 'g': /* TBC -- Tabulation clear */
1528 switch (csiescseq.arg[0]) {
1529 case 0: /* clear current tab stop */
1530 term.tabs[term.c.x] = 0;
1531 break;
1532 case 3: /* clear all the tabs */
1533 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1534 break;
1535 default:
1536 goto unknown;
1537 }
1538 break;
1539 case 'G': /* CHA -- Move to <col> */
1540 case '`': /* HPA */
1541 DEFAULT(csiescseq.arg[0], 1);
1542 tmoveto(csiescseq.arg[0]-1, term.c.y);
1543 break;
1544 case 'H': /* CUP -- Move to <row> <col> */
1545 case 'f': /* HVP */
1546 DEFAULT(csiescseq.arg[0], 1);
1547 DEFAULT(csiescseq.arg[1], 1);
1548 tmoveto(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1549 break;
1550 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1551 DEFAULT(csiescseq.arg[0], 1);
1552 while(csiescseq.arg[0]--)
1553 tputtab(1);
1554 break;
1555 case 'J': /* ED -- Clear screen */
1556 sel.bx = -1;
1557 switch(csiescseq.arg[0]) {
1558 case 0: /* below */
1559 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1560 if(term.c.y < term.row-1)
1561 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1562 break;
1563 case 1: /* above */
1564 if(term.c.y > 1)
1565 tclearregion(0, 0, term.col-1, term.c.y-1);
1566 tclearregion(0, term.c.y, term.c.x, term.c.y);
1567 break;
1568 case 2: /* all */
1569 tclearregion(0, 0, term.col-1, term.row-1);
1570 break;
1571 default:
1572 goto unknown;
1573 }
1574 break;
1575 case 'K': /* EL -- Clear line */
1576 switch(csiescseq.arg[0]) {
1577 case 0: /* right */
1578 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1579 break;
1580 case 1: /* left */
1581 tclearregion(0, term.c.y, term.c.x, term.c.y);
1582 break;
1583 case 2: /* all */
1584 tclearregion(0, term.c.y, term.col-1, term.c.y);
1585 break;
1586 }
1587 break;
1588 case 'S': /* SU -- Scroll <n> line up */
1589 DEFAULT(csiescseq.arg[0], 1);
1590 tscrollup(term.top, csiescseq.arg[0]);
1591 break;
1592 case 'T': /* SD -- Scroll <n> line down */
1593 DEFAULT(csiescseq.arg[0], 1);
1594 tscrolldown(term.top, csiescseq.arg[0]);
1595 break;
1596 case 'L': /* IL -- Insert <n> blank lines */
1597 DEFAULT(csiescseq.arg[0], 1);
1598 tinsertblankline(csiescseq.arg[0]);
1599 break;
1600 case 'l': /* RM -- Reset Mode */
1601 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1602 break;
1603 case 'M': /* DL -- Delete <n> lines */
1604 DEFAULT(csiescseq.arg[0], 1);
1605 tdeleteline(csiescseq.arg[0]);
1606 break;
1607 case 'X': /* ECH -- Erase <n> char */
1608 DEFAULT(csiescseq.arg[0], 1);
1609 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
1610 break;
1611 case 'P': /* DCH -- Delete <n> char */
1612 DEFAULT(csiescseq.arg[0], 1);
1613 tdeletechar(csiescseq.arg[0]);
1614 break;
1615 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1616 DEFAULT(csiescseq.arg[0], 1);
1617 while(csiescseq.arg[0]--)
1618 tputtab(0);
1619 break;
1620 case 'd': /* VPA -- Move to <row> */
1621 DEFAULT(csiescseq.arg[0], 1);
1622 tmoveto(term.c.x, csiescseq.arg[0]-1);
1623 break;
1624 case 'h': /* SM -- Set terminal mode */
1625 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1626 break;
1627 case 'm': /* SGR -- Terminal attribute (color) */
1628 tsetattr(csiescseq.arg, csiescseq.narg);
1629 break;
1630 case 'r': /* DECSTBM -- Set Scrolling Region */
1631 if(csiescseq.priv) {
1632 goto unknown;
1633 } else {
1634 DEFAULT(csiescseq.arg[0], 1);
1635 DEFAULT(csiescseq.arg[1], term.row);
1636 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1637 tmoveto(0, 0);
1638 }
1639 break;
1640 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1641 tcursor(CURSOR_SAVE);
1642 break;
1643 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1644 tcursor(CURSOR_LOAD);
1645 break;
1646 }
1647 }
1648
1649 void
1650 csidump(void) {
1651 int i;
1652 uint c;
1653
1654 printf("ESC[");
1655 for(i = 0; i < csiescseq.len; i++) {
1656 c = csiescseq.buf[i] & 0xff;
1657 if(isprint(c)) {
1658 putchar(c);
1659 } else if(c == '\n') {
1660 printf("(\\n)");
1661 } else if(c == '\r') {
1662 printf("(\\r)");
1663 } else if(c == 0x1b) {
1664 printf("(\\e)");
1665 } else {
1666 printf("(%02x)", c);
1667 }
1668 }
1669 putchar('\n');
1670 }
1671
1672 void
1673 csireset(void) {
1674 memset(&csiescseq, 0, sizeof(csiescseq));
1675 }
1676
1677 void
1678 strhandle(void) {
1679 char *p;
1680
1681 /*
1682 * TODO: make this being useful in case of color palette change.
1683 */
1684 strparse();
1685
1686 p = strescseq.buf;
1687
1688 switch(strescseq.type) {
1689 case ']': /* OSC -- Operating System Command */
1690 switch(p[0]) {
1691 case '0':
1692 case '1':
1693 case '2':
1694 /*
1695 * TODO: Handle special chars in string, like umlauts.
1696 */
1697 if(p[1] == ';') {
1698 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1699 }
1700 break;
1701 case ';':
1702 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1703 break;
1704 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1705 break;
1706 default:
1707 fprintf(stderr, "erresc: unknown str ");
1708 strdump();
1709 break;
1710 }
1711 break;
1712 case 'k': /* old title set compatibility */
1713 XStoreName(xw.dpy, xw.win, strescseq.buf);
1714 break;
1715 case 'P': /* DSC -- Device Control String */
1716 case '_': /* APC -- Application Program Command */
1717 case '^': /* PM -- Privacy Message */
1718 default:
1719 fprintf(stderr, "erresc: unknown str ");
1720 strdump();
1721 /* die(""); */
1722 break;
1723 }
1724 }
1725
1726 void
1727 strparse(void) {
1728 /*
1729 * TODO: Implement parsing like for CSI when required.
1730 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1731 */
1732 return;
1733 }
1734
1735 void
1736 strdump(void) {
1737 int i;
1738 uint c;
1739
1740 printf("ESC%c", strescseq.type);
1741 for(i = 0; i < strescseq.len; i++) {
1742 c = strescseq.buf[i] & 0xff;
1743 if(isprint(c)) {
1744 putchar(c);
1745 } else if(c == '\n') {
1746 printf("(\\n)");
1747 } else if(c == '\r') {
1748 printf("(\\r)");
1749 } else if(c == 0x1b) {
1750 printf("(\\e)");
1751 } else {
1752 printf("(%02x)", c);
1753 }
1754 }
1755 printf("ESC\\\n");
1756 }
1757
1758 void
1759 strreset(void) {
1760 memset(&strescseq, 0, sizeof(strescseq));
1761 }
1762
1763 void
1764 tputtab(bool forward) {
1765 uint x = term.c.x;
1766
1767 if(forward) {
1768 if(x == term.col)
1769 return;
1770 for(++x; x < term.col && !term.tabs[x]; ++x)
1771 /* nothing */ ;
1772 } else {
1773 if(x == 0)
1774 return;
1775 for(--x; x > 0 && !term.tabs[x]; --x)
1776 /* nothing */ ;
1777 }
1778 tmoveto(x, term.c.y);
1779 }
1780
1781 void
1782 tputc(char *c, int len) {
1783 uchar ascii = *c;
1784
1785 if(iofd != -1)
1786 write(iofd, c, len);
1787
1788 switch(ascii) {
1789 case '\t':
1790 tputtab(1);
1791 return;
1792 case '\b':
1793 tmoveto(term.c.x-1, term.c.y);
1794 return;
1795 case '\r':
1796 tmoveto(0, term.c.y);
1797 return;
1798 case '\f':
1799 case '\v':
1800 case '\n':
1801 /* go to first col if the mode is set */
1802 tnewline(IS_SET(MODE_CRLF));
1803 return;
1804 case '\a':
1805 if(term.esc & ESC_STR)
1806 break;
1807
1808 if(!(xw.state & WIN_FOCUSED))
1809 xseturgency(1);
1810 return;
1811 case '\033':
1812 csireset();
1813 term.esc = ESC_START;
1814 return;
1815 }
1816
1817 if(term.esc & ESC_START) {
1818 if(term.esc & ESC_CSI) {
1819 csiescseq.buf[csiescseq.len++] = ascii;
1820 if(BETWEEN(ascii, 0x40, 0x7E)
1821 || csiescseq.len >= ESC_BUF_SIZ) {
1822 term.esc = 0;
1823 csiparse(), csihandle();
1824 }
1825 } else if(term.esc & ESC_STR) {
1826 switch(ascii) {
1827 case '\033':
1828 term.esc = ESC_START | ESC_STR_END;
1829 break;
1830 case '\a': /* backwards compatibility to xterm */
1831 term.esc = 0;
1832 strhandle();
1833 break;
1834 default:
1835 strescseq.buf[strescseq.len++] = ascii;
1836 if(strescseq.len+1 >= STR_BUF_SIZ) {
1837 term.esc = 0;
1838 strhandle();
1839 }
1840 }
1841 } else if(term.esc & ESC_STR_END) {
1842 term.esc = 0;
1843 if(ascii == '\\')
1844 strhandle();
1845 } else if(term.esc & ESC_ALTCHARSET) {
1846 switch(ascii) {
1847 case '0': /* Line drawing set */
1848 term.c.attr.mode |= ATTR_GFX;
1849 break;
1850 case 'B': /* USASCII */
1851 term.c.attr.mode &= ~ATTR_GFX;
1852 break;
1853 case 'A': /* UK (IGNORED) */
1854 case '<': /* multinational charset (IGNORED) */
1855 case '5': /* Finnish (IGNORED) */
1856 case 'C': /* Finnish (IGNORED) */
1857 case 'K': /* German (IGNORED) */
1858 break;
1859 default:
1860 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1861 }
1862 term.esc = 0;
1863 } else {
1864 switch(ascii) {
1865 case '[':
1866 term.esc |= ESC_CSI;
1867 break;
1868 case 'P': /* DCS -- Device Control String */
1869 case '_': /* APC -- Application Program Command */
1870 case '^': /* PM -- Privacy Message */
1871 case ']': /* OSC -- Operating System Command */
1872 case 'k': /* old title set compatibility */
1873 strreset();
1874 strescseq.type = ascii;
1875 term.esc |= ESC_STR;
1876 break;
1877 case '(': /* set primary charset G0 */
1878 term.esc |= ESC_ALTCHARSET;
1879 break;
1880 case ')': /* set secondary charset G1 (IGNORED) */
1881 case '*': /* set tertiary charset G2 (IGNORED) */
1882 case '+': /* set quaternary charset G3 (IGNORED) */
1883 term.esc = 0;
1884 break;
1885 case 'D': /* IND -- Linefeed */
1886 if(term.c.y == term.bot) {
1887 tscrollup(term.top, 1);
1888 } else {
1889 tmoveto(term.c.x, term.c.y+1);
1890 }
1891 term.esc = 0;
1892 break;
1893 case 'E': /* NEL -- Next line */
1894 tnewline(1); /* always go to first col */
1895 term.esc = 0;
1896 break;
1897 case 'H': /* HTS -- Horizontal tab stop */
1898 term.tabs[term.c.x] = 1;
1899 term.esc = 0;
1900 break;
1901 case 'M': /* RI -- Reverse index */
1902 if(term.c.y == term.top) {
1903 tscrolldown(term.top, 1);
1904 } else {
1905 tmoveto(term.c.x, term.c.y-1);
1906 }
1907 term.esc = 0;
1908 break;
1909 case 'c': /* RIS -- Reset to inital state */
1910 treset();
1911 term.esc = 0;
1912 xclearborders();
1913 xresettitle();
1914 break;
1915 case '=': /* DECPAM -- Application keypad */
1916 term.mode |= MODE_APPKEYPAD;
1917 term.esc = 0;
1918 break;
1919 case '>': /* DECPNM -- Normal keypad */
1920 term.mode &= ~MODE_APPKEYPAD;
1921 term.esc = 0;
1922 break;
1923 case '7': /* DECSC -- Save Cursor */
1924 tcursor(CURSOR_SAVE);
1925 term.esc = 0;
1926 break;
1927 case '8': /* DECRC -- Restore Cursor */
1928 tcursor(CURSOR_LOAD);
1929 term.esc = 0;
1930 break;
1931 case '\\': /* ST -- Stop */
1932 term.esc = 0;
1933 break;
1934 default:
1935 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
1936 (uchar) ascii, isprint(ascii)? ascii:'.');
1937 term.esc = 0;
1938 }
1939 }
1940 } else {
1941 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
1942 sel.bx = -1;
1943 if(ascii >= '\020' || term.c.attr.mode & ATTR_GFX) {
1944 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1945 tnewline(1); /* always go to first col */
1946 tsetchar(c);
1947 if(term.c.x+1 < term.col) {
1948 tmoveto(term.c.x+1, term.c.y);
1949 } else {
1950 term.c.state |= CURSOR_WRAPNEXT;
1951 }
1952 }
1953 }
1954 }
1955
1956 int
1957 tresize(int col, int row) {
1958 int i, x;
1959 int minrow = MIN(row, term.row);
1960 int mincol = MIN(col, term.col);
1961 int slide = term.c.y - row + 1;
1962 bool *bp;
1963
1964 if(col < 1 || row < 1)
1965 return 0;
1966
1967 /* free unneeded rows */
1968 i = 0;
1969 if(slide > 0) {
1970 /* slide screen to keep cursor where we expect it -
1971 * tscrollup would work here, but we can optimize to
1972 * memmove because we're freeing the earlier lines */
1973 for(/* i = 0 */; i < slide; i++) {
1974 free(term.line[i]);
1975 free(term.alt[i]);
1976 }
1977 memmove(term.line, term.line + slide, row * sizeof(Line));
1978 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1979 }
1980 for(i += row; i < term.row; i++) {
1981 free(term.line[i]);
1982 free(term.alt[i]);
1983 }
1984
1985 /* resize to new height */
1986 term.line = xrealloc(term.line, row * sizeof(Line));
1987 term.alt = xrealloc(term.alt, row * sizeof(Line));
1988 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
1989 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
1990
1991 /* resize each row to new width, zero-pad if needed */
1992 for(i = 0; i < minrow; i++) {
1993 term.dirty[i] = 1;
1994 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
1995 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
1996 for(x = mincol; x < col; x++) {
1997 term.line[i][x].state = 0;
1998 term.alt[i][x].state = 0;
1999 }
2000 }
2001
2002 /* allocate any new rows */
2003 for(/* i == minrow */; i < row; i++) {
2004 term.dirty[i] = 1;
2005 term.line[i] = xcalloc(col, sizeof(Glyph));
2006 term.alt [i] = xcalloc(col, sizeof(Glyph));
2007 }
2008 if(col > term.col) {
2009 bp = term.tabs + term.col;
2010
2011 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2012 while(--bp > term.tabs && !*bp)
2013 /* nothing */ ;
2014 for(bp += TAB; bp < term.tabs + col; bp += TAB)
2015 *bp = 1;
2016 }
2017 /* update terminal size */
2018 term.col = col, term.row = row;
2019 /* make use of the LIMIT in tmoveto */
2020 tmoveto(term.c.x, term.c.y);
2021 /* reset scrolling region */
2022 tsetscroll(0, row-1);
2023
2024 return (slide > 0);
2025 }
2026
2027 void
2028 xresize(int col, int row) {
2029 xw.tw = MAX(1, 2*BORDER + col * xw.cw);
2030 xw.th = MAX(1, 2*BORDER + row * xw.ch);
2031
2032 XftDrawChange(xw.xft_draw, xw.buf);
2033 }
2034
2035 void
2036 xloadcols(void) {
2037 int i, r, g, b;
2038 XRenderColor xft_color = { .alpha = 0 };
2039
2040 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2041 for(i = 0; i < LEN(colorname); i++) {
2042 if(!colorname[i])
2043 continue;
2044 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.xft_col[i])) {
2045 die("Could not allocate color '%s'\n", colorname[i]);
2046 }
2047 }
2048
2049 /* load colors [16-255] ; same colors as xterm */
2050 for(i = 16, r = 0; r < 6; r++) {
2051 for(g = 0; g < 6; g++) {
2052 for(b = 0; b < 6; b++) {
2053 xft_color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
2054 xft_color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
2055 xft_color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
2056 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &xft_color, &dc.xft_col[i])) {
2057 die("Could not allocate color %d\n", i);
2058 }
2059 i++;
2060 }
2061 }
2062 }
2063
2064 for(r = 0; r < 24; r++, i++) {
2065 xft_color.red = xft_color.green = xft_color.blue = 0x0808 + 0x0a0a * r;
2066 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &xft_color,
2067 &dc.xft_col[i])) {
2068 die("Could not allocate color %d\n", i);
2069 }
2070 }
2071 }
2072
2073 void
2074 xtermclear(int col1, int row1, int col2, int row2) {
2075 XftDrawRect(xw.xft_draw,
2076 &dc.xft_col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG],
2077 BORDER + col1 * xw.cw,
2078 BORDER + row1 * xw.ch,
2079 (col2-col1+1) * xw.cw,
2080 (row2-row1+1) * xw.ch);
2081 }
2082
2083 /*
2084 * Absolute coordinates.
2085 */
2086 void
2087 xclear(int x1, int y1, int x2, int y2) {
2088 XftDrawRect(xw.xft_draw,
2089 &dc.xft_col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG],
2090 x1, y1, x2-x1, y2-y1);
2091 }
2092
2093 void
2094 xclearborders(void) {
2095 /* top and left border */
2096 xclear(0, 0, BORDER, xw.h);
2097 xclear(0, 0, xw.w, BORDER);
2098
2099 /* lower and right border */
2100 xclear(BORDER, xw.th - 1, xw.w, xw.h);
2101 /* Will just draw what hasn't been drawn by the previous call. */
2102 xclear(xw.tw - 1, BORDER, xw.w, xw.h - xw.th - 2);
2103 }
2104
2105 void
2106 xhints(void) {
2107 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
2108 XWMHints wm = {.flags = InputHint, .input = 1};
2109 XSizeHints *sizeh = NULL;
2110
2111 sizeh = XAllocSizeHints();
2112 if(xw.isfixed == False) {
2113 sizeh->flags = PSize | PResizeInc | PBaseSize;
2114 sizeh->height = xw.h;
2115 sizeh->width = xw.w;
2116 sizeh->height_inc = xw.ch;
2117 sizeh->width_inc = xw.cw;
2118 sizeh->base_height = 2*BORDER;
2119 sizeh->base_width = 2*BORDER;
2120 } else {
2121 sizeh->flags = PMaxSize | PMinSize;
2122 sizeh->min_width = sizeh->max_width = xw.fw;
2123 sizeh->min_height = sizeh->max_height = xw.fh;
2124 }
2125
2126 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2127 XFree(sizeh);
2128 }
2129
2130 void
2131 xinitfont(Font *f, char *fontstr) {
2132 FcPattern *pattern, *match;
2133 FcResult result;
2134
2135 pattern = FcNameParse((FcChar8 *)fontstr);
2136 if(!pattern)
2137 die("st: can't open font %s\n", fontstr);
2138
2139 match = XftFontMatch(xw.dpy, xw.scr, pattern, &result);
2140 FcPatternDestroy(pattern);
2141 if(!match)
2142 die("st: can't open font %s\n", fontstr);
2143 if(!(f->xft_set = XftFontOpenPattern(xw.dpy, match))) {
2144 FcPatternDestroy(match);
2145 die("st: can't open font %s.\n", fontstr);
2146 }
2147
2148 f->ascent = f->xft_set->ascent;
2149 f->descent = f->xft_set->descent;
2150 f->lbearing = 0;
2151 f->rbearing = f->xft_set->max_advance_width;
2152
2153 f->height = f->xft_set->height;
2154 f->width = f->lbearing + f->rbearing;
2155 }
2156
2157 void
2158 initfonts(char *fontstr) {
2159 char *fstr;
2160
2161 xinitfont(&dc.font, fontstr);
2162 xw.cw = dc.font.width;
2163 xw.ch = dc.font.height;
2164
2165 fstr = smstrcat(fontstr, ":weight=bold", NULL);
2166 xinitfont(&dc.bfont, fstr);
2167 free(fstr);
2168
2169 fstr = smstrcat(fontstr, ":slant=italic,oblique", NULL);
2170 xinitfont(&dc.ifont, fstr);
2171 free(fstr);
2172
2173 fstr = smstrcat(fontstr, ":weight=bold:slant=italic,oblique", NULL);
2174 xinitfont(&dc.ibfont, fstr);
2175 free(fstr);
2176 }
2177
2178 void
2179 xinit(void) {
2180 XSetWindowAttributes attrs;
2181 Cursor cursor;
2182 Window parent;
2183 int sw, sh, major, minor;
2184
2185 if(!(xw.dpy = XOpenDisplay(NULL)))
2186 die("Can't open display\n");
2187 xw.scr = XDefaultScreen(xw.dpy);
2188 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2189
2190 /* font */
2191 initfonts((opt_font != NULL)? opt_font : FONT);
2192
2193 /* colors */
2194 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2195 xloadcols();
2196
2197 /* adjust fixed window geometry */
2198 if(xw.isfixed) {
2199 sw = DisplayWidth(xw.dpy, xw.scr);
2200 sh = DisplayHeight(xw.dpy, xw.scr);
2201 if(xw.fx < 0)
2202 xw.fx = sw + xw.fx - xw.fw - 1;
2203 if(xw.fy < 0)
2204 xw.fy = sh + xw.fy - xw.fh - 1;
2205
2206 xw.h = xw.fh;
2207 xw.w = xw.fw;
2208 } else {
2209 /* window - default size */
2210 xw.h = 2*BORDER + term.row * xw.ch;
2211 xw.w = 2*BORDER + term.col * xw.cw;
2212 xw.fx = 0;
2213 xw.fy = 0;
2214 }
2215
2216 attrs.background_pixel = dc.xft_col[DefaultBG].pixel;
2217 attrs.border_pixel = dc.xft_col[DefaultBG].pixel;
2218 attrs.bit_gravity = NorthWestGravity;
2219 attrs.event_mask = FocusChangeMask | KeyPressMask
2220 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2221 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2222 attrs.colormap = xw.cmap;
2223
2224 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
2225 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2226 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2227 xw.vis,
2228 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2229 | CWColormap,
2230 &attrs);
2231
2232 /* double buffering */
2233 if(!XdbeQueryExtension(xw.dpy, &major, &minor))
2234 die("Xdbe extension is not present\n");
2235 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
2236
2237 /* Xft rendering context */
2238 xw.xft_draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2239
2240 /* input methods */
2241 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
2242 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2243 | XIMStatusNothing, XNClientWindow, xw.win,
2244 XNFocusWindow, xw.win, NULL);
2245 /* gc */
2246 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
2247
2248 /* white cursor, black outline */
2249 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2250 XDefineCursor(xw.dpy, xw.win, cursor);
2251 XRecolorCursor(xw.dpy, cursor,
2252 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2253 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2254
2255 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2256 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2257 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2258
2259 xresettitle();
2260 XMapWindow(xw.dpy, xw.win);
2261 xhints();
2262 XSync(xw.dpy, 0);
2263 }
2264
2265 void
2266 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2267 int winx = BORDER+x*xw.cw, winy = BORDER+y*xw.ch,
2268 width = charlen*xw.cw;
2269 Font *font = &dc.font;
2270 XGlyphInfo extents;
2271 XftColor *fg = &dc.xft_col[base.fg], *bg = &dc.xft_col[base.bg],
2272 *temp, revfg, revbg;
2273 XRenderColor colfg, colbg;
2274
2275 if(base.mode & ATTR_REVERSE)
2276 temp = fg, fg = bg, bg = temp;
2277
2278 if(base.mode & ATTR_BOLD) {
2279 if(BETWEEN(base.fg, 0, 7)) {
2280 /* basic system colors */
2281 fg = &dc.xft_col[base.fg + 8];
2282 } else if(BETWEEN(base.fg, 16, 195)) {
2283 /* 256 colors */
2284 fg = &dc.xft_col[base.fg + 36];
2285 } else if(BETWEEN(base.fg, 232, 251)) {
2286 /* greyscale */
2287 fg = &dc.xft_col[base.fg + 4];
2288 }
2289 /*
2290 * Those ranges will not be brightened:
2291 * 8 - 15 – bright system colors
2292 * 196 - 231 – highest 256 color cube
2293 * 252 - 255 – brightest colors in grescale
2294 */
2295 font = &dc.bfont;
2296 }
2297
2298 if(base.mode & ATTR_ITALIC)
2299 font = &dc.ifont;
2300 if(base.mode & (ATTR_ITALIC|ATTR_ITALIC))
2301 font = &dc.ibfont;
2302
2303 if(IS_SET(MODE_REVERSE)) {
2304 if(fg == &dc.xft_col[DefaultFG]) {
2305 fg = &dc.xft_col[DefaultBG];
2306 } else {
2307 colfg.red = ~fg->color.red;
2308 colfg.green = ~fg->color.green;
2309 colfg.blue = ~fg->color.blue;
2310 colfg.alpha = fg->color.alpha;
2311 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2312 fg = &revfg;
2313 }
2314
2315 if(bg == &dc.xft_col[DefaultBG]) {
2316 bg = &dc.xft_col[DefaultFG];
2317 } else {
2318 colbg.red = ~bg->color.red;
2319 colbg.green = ~bg->color.green;
2320 colbg.blue = ~bg->color.blue;
2321 colbg.alpha = bg->color.alpha;
2322 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2323 bg = &revbg;
2324 }
2325 }
2326
2327 XftTextExtentsUtf8(xw.dpy, font->xft_set, (FcChar8 *)s, bytelen,
2328 &extents);
2329 width = extents.xOff;
2330
2331 XftDrawRect(xw.xft_draw, bg, winx, winy, width, xw.ch);
2332 XftDrawStringUtf8(xw.xft_draw, fg, font->xft_set, winx,
2333 winy + font->ascent, (FcChar8 *)s, bytelen);
2334
2335 if(base.mode & ATTR_UNDERLINE) {
2336 XftDrawRect(xw.xft_draw, fg, winx, winy + font->ascent + 1,
2337 width, 1);
2338 }
2339 }
2340
2341 void
2342 xdrawcursor(void) {
2343 static int oldx = 0, oldy = 0;
2344 int sl;
2345 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
2346
2347 LIMIT(oldx, 0, term.col-1);
2348 LIMIT(oldy, 0, term.row-1);
2349
2350 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2351 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2352
2353 /* remove the old cursor */
2354 if(term.line[oldy][oldx].state & GLYPH_SET) {
2355 sl = utf8size(term.line[oldy][oldx].c);
2356 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2357 oldy, 1, sl);
2358 } else {
2359 xtermclear(oldx, oldy, oldx, oldy);
2360 }
2361
2362 /* draw the new one */
2363 if(!(term.c.state & CURSOR_HIDE)) {
2364 if(!(xw.state & WIN_FOCUSED))
2365 g.bg = DefaultUCS;
2366
2367 if(IS_SET(MODE_REVERSE))
2368 g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
2369
2370 sl = utf8size(g.c);
2371 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2372 oldx = term.c.x, oldy = term.c.y;
2373 }
2374 }
2375
2376 void
2377 xresettitle(void) {
2378 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
2379 }
2380
2381 void
2382 redraw(void) {
2383 struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
2384
2385 xclearborders();
2386 tfulldirt();
2387 draw();
2388 XSync(xw.dpy, False); /* necessary for a good tput flash */
2389 nanosleep(&tv, NULL);
2390 }
2391
2392 void
2393 draw(void) {
2394 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2395
2396 drawregion(0, 0, term.col, term.row);
2397 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2398 }
2399
2400 void
2401 drawregion(int x1, int y1, int x2, int y2) {
2402 int ic, ib, x, y, ox, sl;
2403 Glyph base, new;
2404 char buf[DRAW_BUF_SIZ];
2405 bool ena_sel = sel.bx != -1, alt = IS_SET(MODE_ALTSCREEN);
2406
2407 if((sel.alt && !alt) || (!sel.alt && alt))
2408 ena_sel = 0;
2409 if(!(xw.state & WIN_VISIBLE))
2410 return;
2411
2412 for(y = y1; y < y2; y++) {
2413 if(!term.dirty[y])
2414 continue;
2415
2416 xtermclear(0, y, term.col, y);
2417 term.dirty[y] = 0;
2418 base = term.line[y][0];
2419 ic = ib = ox = 0;
2420 for(x = x1; x < x2; x++) {
2421 new = term.line[y][x];
2422 if(ena_sel && *(new.c) && selected(x, y))
2423 new.mode ^= ATTR_REVERSE;
2424 if(ib > 0 && (!(new.state & GLYPH_SET)
2425 || ATTRCMP(base, new)
2426 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2427 xdraws(buf, base, ox, y, ic, ib);
2428 ic = ib = 0;
2429 }
2430 if(new.state & GLYPH_SET) {
2431 if(ib == 0) {
2432 ox = x;
2433 base = new;
2434 }
2435 sl = utf8size(new.c);
2436 memcpy(buf+ib, new.c, sl);
2437 ib += sl;
2438 ++ic;
2439 }
2440 }
2441 if(ib > 0)
2442 xdraws(buf, base, ox, y, ic, ib);
2443 }
2444 xdrawcursor();
2445 }
2446
2447 void
2448 expose(XEvent *ev) {
2449 XExposeEvent *e = &ev->xexpose;
2450
2451 if(xw.state & WIN_REDRAW) {
2452 if(!e->count)
2453 xw.state &= ~WIN_REDRAW;
2454 }
2455 }
2456
2457 void
2458 visibility(XEvent *ev) {
2459 XVisibilityEvent *e = &ev->xvisibility;
2460
2461 if(e->state == VisibilityFullyObscured) {
2462 xw.state &= ~WIN_VISIBLE;
2463 } else if(!(xw.state & WIN_VISIBLE)) {
2464 /* need a full redraw for next Expose, not just a buf copy */
2465 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2466 }
2467 }
2468
2469 void
2470 unmap(XEvent *ev) {
2471 xw.state &= ~WIN_VISIBLE;
2472 }
2473
2474 void
2475 xseturgency(int add) {
2476 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2477
2478 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2479 XSetWMHints(xw.dpy, xw.win, h);
2480 XFree(h);
2481 }
2482
2483 void
2484 focus(XEvent *ev) {
2485 if(ev->type == FocusIn) {
2486 xw.state |= WIN_FOCUSED;
2487 xseturgency(0);
2488 } else {
2489 xw.state &= ~WIN_FOCUSED;
2490 }
2491 }
2492
2493 char*
2494 kmap(KeySym k, uint state) {
2495 int i;
2496 uint mask;
2497
2498 state &= ~Mod2Mask;
2499 for(i = 0; i < LEN(key); i++) {
2500 mask = key[i].mask;
2501
2502 if(key[i].k == k && ((state & mask) == mask
2503 || (mask == XK_NO_MOD && !state))) {
2504 return (char*)key[i].s;
2505 }
2506 }
2507 return NULL;
2508 }
2509
2510 void
2511 kpress(XEvent *ev) {
2512 XKeyEvent *e = &ev->xkey;
2513 KeySym ksym;
2514 char buf[32];
2515 char *customkey;
2516 int len;
2517 int meta;
2518 int shift;
2519 Status status;
2520
2521 if (IS_SET(MODE_KBDLOCK))
2522 return;
2523
2524 meta = e->state & Mod1Mask;
2525 shift = e->state & ShiftMask;
2526 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
2527
2528 /* 1. custom keys from config.h */
2529 if((customkey = kmap(ksym, e->state))) {
2530 ttywrite(customkey, strlen(customkey));
2531 /* 2. hardcoded (overrides X lookup) */
2532 } else {
2533 switch(ksym) {
2534 case XK_Up:
2535 case XK_Down:
2536 case XK_Left:
2537 case XK_Right:
2538 /* XXX: shift up/down doesn't work */
2539 sprintf(buf, "\033%c%c",
2540 IS_SET(MODE_APPKEYPAD) ? 'O' : '[',
2541 (shift ? "dacb":"DACB")[ksym - XK_Left]);
2542 ttywrite(buf, 3);
2543 break;
2544 case XK_Insert:
2545 if(shift)
2546 selpaste();
2547 break;
2548 case XK_Return:
2549 if(IS_SET(MODE_CRLF)) {
2550 ttywrite("\r\n", 2);
2551 } else {
2552 ttywrite("\r", 1);
2553 }
2554 break;
2555 /* 3. X lookup */
2556 default:
2557 if(len > 0) {
2558 if(meta && len == 1)
2559 ttywrite("\033", 1);
2560 ttywrite(buf, len);
2561 }
2562 break;
2563 }
2564 }
2565 }
2566
2567 void
2568 cmessage(XEvent *e) {
2569 /* See xembed specs
2570 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2571 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2572 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2573 xw.state |= WIN_FOCUSED;
2574 xseturgency(0);
2575 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2576 xw.state &= ~WIN_FOCUSED;
2577 }
2578 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
2579 /* Send SIGHUP to shell */
2580 kill(pid, SIGHUP);
2581 exit(EXIT_SUCCESS);
2582 }
2583 }
2584
2585 void
2586 resize(XEvent *e) {
2587 int col, row;
2588
2589 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2590 return;
2591
2592 xw.w = e->xconfigure.width;
2593 xw.h = e->xconfigure.height;
2594 col = (xw.w - 2*BORDER) / xw.cw;
2595 row = (xw.h - 2*BORDER) / xw.ch;
2596 if(col == term.col && row == term.row)
2597 return;
2598
2599 tresize(col, row);
2600 xresize(col, row);
2601 xclearborders();
2602 ttyresize();
2603 }
2604
2605 void
2606 run(void) {
2607 XEvent ev;
2608 fd_set rfd;
2609 int xfd = XConnectionNumber(xw.dpy), i;
2610 struct timeval drawtimeout, *tv = NULL;
2611
2612 for(i = 0;; i++) {
2613 FD_ZERO(&rfd);
2614 FD_SET(cmdfd, &rfd);
2615 FD_SET(xfd, &rfd);
2616 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
2617 if(errno == EINTR)
2618 continue;
2619 die("select failed: %s\n", SERRNO);
2620 }
2621
2622 /*
2623 * Stop after a certain number of reads so the user does not
2624 * feel like the system is stuttering.
2625 */
2626 if(i < 1000 && FD_ISSET(cmdfd, &rfd)) {
2627 ttyread();
2628
2629 /*
2630 * Just wait a bit so it isn't disturbing the
2631 * user and the system is able to write something.
2632 */
2633 drawtimeout.tv_sec = 0;
2634 drawtimeout.tv_usec = 5;
2635 tv = &drawtimeout;
2636 continue;
2637 }
2638 i = 0;
2639 tv = NULL;
2640
2641 while(XPending(xw.dpy)) {
2642 XNextEvent(xw.dpy, &ev);
2643 if(XFilterEvent(&ev, xw.win))
2644 continue;
2645 if(handler[ev.type])
2646 (handler[ev.type])(&ev);
2647 }
2648
2649 draw();
2650 XFlush(xw.dpy);
2651 }
2652 }
2653
2654 int
2655 main(int argc, char *argv[]) {
2656 int i, bitm, xr, yr;
2657 uint wr, hr;
2658
2659 xw.fw = xw.fh = xw.fx = xw.fy = 0;
2660 xw.isfixed = False;
2661
2662 for(i = 1; i < argc; i++) {
2663 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2664 case 'c':
2665 if(++i < argc)
2666 opt_class = argv[i];
2667 break;
2668 case 'e':
2669 /* eat every remaining arguments */
2670 if(++i < argc)
2671 opt_cmd = &argv[i];
2672 goto run;
2673 case 'f':
2674 if(++i < argc)
2675 opt_font = argv[i];
2676 break;
2677 case 'g':
2678 if(++i >= argc)
2679 break;
2680
2681 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
2682 if(bitm & XValue)
2683 xw.fx = xr;
2684 if(bitm & YValue)
2685 xw.fy = yr;
2686 if(bitm & WidthValue)
2687 xw.fw = (int)wr;
2688 if(bitm & HeightValue)
2689 xw.fh = (int)hr;
2690 if(bitm & XNegative && xw.fx == 0)
2691 xw.fx = -1;
2692 if(bitm & XNegative && xw.fy == 0)
2693 xw.fy = -1;
2694
2695 if(xw.fh != 0 && xw.fw != 0)
2696 xw.isfixed = True;
2697 break;
2698 case 'o':
2699 if(++i < argc)
2700 opt_io = argv[i];
2701 break;
2702 case 't':
2703 if(++i < argc)
2704 opt_title = argv[i];
2705 break;
2706 case 'v':
2707 default:
2708 die(USAGE);
2709 case 'w':
2710 if(++i < argc)
2711 opt_embed = argv[i];
2712 break;
2713 }
2714 }
2715
2716 run:
2717 setlocale(LC_CTYPE, "");
2718 tnew(80, 24);
2719 ttynew();
2720 xinit();
2721 selinit();
2722 run();
2723 return 0;
2724 }
2725