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aa2cd085eec33f594bcb8aa800fd5f75e6329074
[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.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/Xft/Xft.h>
28 #include <fontconfig/fontconfig.h>
29
30 #include "arg.h"
31
32 char *argv0;
33
34 #define Glyph Glyph_
35 #define Font Font_
36 #define Draw XftDraw *
37 #define Colour XftColor
38 #define Colourmap Colormap
39 #define Rectangle XRectangle
40
41 #if defined(__linux)
42 #include <pty.h>
43 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
44 #include <util.h>
45 #elif defined(__FreeBSD__) || defined(__DragonFly__)
46 #include <libutil.h>
47 #endif
48
49
50 /* XEMBED messages */
51 #define XEMBED_FOCUS_IN 4
52 #define XEMBED_FOCUS_OUT 5
53
54 /* Arbitrary sizes */
55 #define UTF_SIZ 4
56 #define ESC_BUF_SIZ (128*UTF_SIZ)
57 #define ESC_ARG_SIZ 16
58 #define STR_BUF_SIZ ESC_BUF_SIZ
59 #define STR_ARG_SIZ ESC_ARG_SIZ
60 #define DRAW_BUF_SIZ 20*1024
61 #define XK_ANY_MOD UINT_MAX
62 #define XK_NO_MOD 0
63 #define XK_SWITCH_MOD (1<<13)
64
65 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
66
67 /* macros */
68 #define SERRNO strerror(errno)
69 #define MIN(a, b) ((a) < (b) ? (a) : (b))
70 #define MAX(a, b) ((a) < (b) ? (b) : (a))
71 #define LEN(a) (sizeof(a) / sizeof(a[0]))
72 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
73 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
74 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
75 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
76 #define IS_SET(flag) ((term.mode & (flag)) != 0)
77 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
78
79 #define VT102ID "\033[?6c"
80
81 enum glyph_attribute {
82 ATTR_NULL = 0,
83 ATTR_REVERSE = 1,
84 ATTR_UNDERLINE = 2,
85 ATTR_BOLD = 4,
86 ATTR_GFX = 8,
87 ATTR_ITALIC = 16,
88 ATTR_BLINK = 32,
89 ATTR_WRAP = 64,
90 };
91
92 enum cursor_movement {
93 CURSOR_SAVE,
94 CURSOR_LOAD
95 };
96
97 enum cursor_state {
98 CURSOR_DEFAULT = 0,
99 CURSOR_WRAPNEXT = 1,
100 CURSOR_ORIGIN = 2
101 };
102
103 enum term_mode {
104 MODE_WRAP = 1,
105 MODE_INSERT = 2,
106 MODE_APPKEYPAD = 4,
107 MODE_ALTSCREEN = 8,
108 MODE_CRLF = 16,
109 MODE_MOUSEBTN = 32,
110 MODE_MOUSEMOTION = 64,
111 MODE_MOUSE = 32|64,
112 MODE_REVERSE = 128,
113 MODE_KBDLOCK = 256,
114 MODE_HIDE = 512,
115 MODE_ECHO = 1024,
116 MODE_APPCURSOR = 2048,
117 MODE_MOUSESGR = 4096,
118 MODE_8BIT = 8192,
119 MODE_BLINK = 16384,
120 MODE_FBLINK = 32768,
121 };
122
123 enum escape_state {
124 ESC_START = 1,
125 ESC_CSI = 2,
126 ESC_STR = 4, /* DSC, OSC, PM, APC */
127 ESC_ALTCHARSET = 8,
128 ESC_STR_END = 16, /* a final string was encountered */
129 ESC_TEST = 32, /* Enter in test mode */
130 };
131
132 enum window_state {
133 WIN_VISIBLE = 1,
134 WIN_REDRAW = 2,
135 WIN_FOCUSED = 4
136 };
137
138 enum selection_type {
139 SEL_REGULAR = 1,
140 SEL_RECTANGULAR = 2
141 };
142
143 enum selection_snap {
144 SNAP_WORD = 1,
145 SNAP_LINE = 2
146 };
147
148 /* bit macro */
149 #undef B0
150 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
151
152 typedef unsigned char uchar;
153 typedef unsigned int uint;
154 typedef unsigned long ulong;
155 typedef unsigned short ushort;
156
157 typedef struct {
158 char c[UTF_SIZ]; /* character code */
159 uchar mode; /* attribute flags */
160 ushort fg; /* foreground */
161 ushort bg; /* background */
162 } Glyph;
163
164 typedef Glyph *Line;
165
166 typedef struct {
167 Glyph attr; /* current char attributes */
168 int x;
169 int y;
170 char state;
171 } TCursor;
172
173 /* CSI Escape sequence structs */
174 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
175 typedef struct {
176 char buf[ESC_BUF_SIZ]; /* raw string */
177 int len; /* raw string length */
178 char priv;
179 int arg[ESC_ARG_SIZ];
180 int narg; /* nb of args */
181 char mode;
182 } CSIEscape;
183
184 /* STR Escape sequence structs */
185 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
186 typedef struct {
187 char type; /* ESC type ... */
188 char buf[STR_BUF_SIZ]; /* raw string */
189 int len; /* raw string length */
190 char *args[STR_ARG_SIZ];
191 int narg; /* nb of args */
192 } STREscape;
193
194 /* Internal representation of the screen */
195 typedef struct {
196 int row; /* nb row */
197 int col; /* nb col */
198 Line *line; /* screen */
199 Line *alt; /* alternate screen */
200 bool *dirty; /* dirtyness of lines */
201 TCursor c; /* cursor */
202 int top; /* top scroll limit */
203 int bot; /* bottom scroll limit */
204 int mode; /* terminal mode flags */
205 int esc; /* escape state flags */
206 bool numlock; /* lock numbers in keyboard */
207 bool *tabs;
208 } Term;
209
210 /* Purely graphic info */
211 typedef struct {
212 Display *dpy;
213 Colourmap cmap;
214 Window win;
215 Drawable buf;
216 Atom xembed, wmdeletewin;
217 XIM xim;
218 XIC xic;
219 Draw draw;
220 Visual *vis;
221 int scr;
222 bool isfixed; /* is fixed geometry? */
223 int fx, fy, fw, fh; /* fixed geometry */
224 int tw, th; /* tty width and height */
225 int w, h; /* window width and height */
226 int ch; /* char height */
227 int cw; /* char width */
228 char state; /* focus, redraw, visible */
229 } XWindow;
230
231 typedef struct {
232 int b;
233 uint mask;
234 char s[ESC_BUF_SIZ];
235 } Mousekey;
236
237 typedef struct {
238 KeySym k;
239 uint mask;
240 char s[ESC_BUF_SIZ];
241 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
242 signed char appkey; /* application keypad */
243 signed char appcursor; /* application cursor */
244 signed char crlf; /* crlf mode */
245 } Key;
246
247 /* TODO: use better name for vars... */
248 typedef struct {
249 int mode;
250 int type;
251 int snap;
252 int bx, by;
253 int ex, ey;
254 struct {
255 int x, y;
256 } b, e;
257 char *clip;
258 Atom xtarget;
259 bool alt;
260 struct timeval tclick1;
261 struct timeval tclick2;
262 } Selection;
263
264 typedef union {
265 int i;
266 unsigned int ui;
267 float f;
268 const void *v;
269 } Arg;
270
271 typedef struct {
272 unsigned int mod;
273 KeySym keysym;
274 void (*func)(const Arg *);
275 const Arg arg;
276 } Shortcut;
277
278 /* function definitions used in config.h */
279 static void clippaste(const Arg *);
280 static void numlock(const Arg *);
281 static void selpaste(const Arg *);
282 static void xzoom(const Arg *);
283
284 /* Config.h for applying patches and the configuration. */
285 #include "config.h"
286
287 /* Font structure */
288 typedef struct {
289 int height;
290 int width;
291 int ascent;
292 int descent;
293 short lbearing;
294 short rbearing;
295 XftFont *match;
296 FcFontSet *set;
297 FcPattern *pattern;
298 } Font;
299
300 /* Drawing Context */
301 typedef struct {
302 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
303 Font font, bfont, ifont, ibfont;
304 GC gc;
305 } DC;
306
307 static void die(const char *, ...);
308 static void draw(void);
309 static void redraw(int);
310 static void drawregion(int, int, int, int);
311 static void execsh(void);
312 static void sigchld(int);
313 static void run(void);
314
315 static void csidump(void);
316 static void csihandle(void);
317 static void csiparse(void);
318 static void csireset(void);
319 static void strdump(void);
320 static void strhandle(void);
321 static void strparse(void);
322 static void strreset(void);
323
324 static int tattrset(int);
325 static void tclearregion(int, int, int, int);
326 static void tcursor(int);
327 static void tdeletechar(int);
328 static void tdeleteline(int);
329 static void tinsertblank(int);
330 static void tinsertblankline(int);
331 static void tmoveto(int, int);
332 static void tmoveato(int x, int y);
333 static void tnew(int, int);
334 static void tnewline(int);
335 static void tputtab(bool);
336 static void tputc(char *, int);
337 static void treset(void);
338 static int tresize(int, int);
339 static void tscrollup(int, int);
340 static void tscrolldown(int, int);
341 static void tsetattr(int*, int);
342 static void tsetchar(char *, Glyph *, int, int);
343 static void tsetscroll(int, int);
344 static void tswapscreen(void);
345 static void tsetdirt(int, int);
346 static void tsetdirtattr(int);
347 static void tsetmode(bool, bool, int *, int);
348 static void tfulldirt(void);
349 static void techo(char *, int);
350
351 static inline bool match(uint, uint);
352 static void ttynew(void);
353 static void ttyread(void);
354 static void ttyresize(void);
355 static void ttywrite(const char *, size_t);
356
357 static void xdraws(char *, Glyph, int, int, int, int);
358 static void xhints(void);
359 static void xclear(int, int, int, int);
360 static void xdrawcursor(void);
361 static void xinit(void);
362 static void xloadcols(void);
363 static int xsetcolorname(int, const char *);
364 static int xloadfont(Font *, FcPattern *);
365 static void xloadfonts(char *, int);
366 static void xsettitle(char *);
367 static void xresettitle(void);
368 static void xseturgency(int);
369 static void xsetsel(char*);
370 static void xtermclear(int, int, int, int);
371 static void xunloadfonts(void);
372 static void xresize(int, int);
373
374 static void expose(XEvent *);
375 static void visibility(XEvent *);
376 static void unmap(XEvent *);
377 static char *kmap(KeySym, uint);
378 static void kpress(XEvent *);
379 static void cmessage(XEvent *);
380 static void cresize(int, int);
381 static void resize(XEvent *);
382 static void focus(XEvent *);
383 static void brelease(XEvent *);
384 static void bpress(XEvent *);
385 static void bmotion(XEvent *);
386 static void selnotify(XEvent *);
387 static void selclear(XEvent *);
388 static void selrequest(XEvent *);
389
390 static void selinit(void);
391 static inline bool selected(int, int);
392 static void selcopy(void);
393 static void selscroll(int, int);
394 static void selsnap(int, int *, int *, int);
395
396 static int utf8decode(char *, long *);
397 static int utf8encode(long *, char *);
398 static int utf8size(char *);
399 static int isfullutf8(char *, int);
400
401 static ssize_t xwrite(int, char *, size_t);
402 static void *xmalloc(size_t);
403 static void *xrealloc(void *, size_t);
404 static void *xcalloc(size_t, size_t);
405
406 static void (*handler[LASTEvent])(XEvent *) = {
407 [KeyPress] = kpress,
408 [ClientMessage] = cmessage,
409 [ConfigureNotify] = resize,
410 [VisibilityNotify] = visibility,
411 [UnmapNotify] = unmap,
412 [Expose] = expose,
413 [FocusIn] = focus,
414 [FocusOut] = focus,
415 [MotionNotify] = bmotion,
416 [ButtonPress] = bpress,
417 [ButtonRelease] = brelease,
418 [SelectionClear] = selclear,
419 [SelectionNotify] = selnotify,
420 [SelectionRequest] = selrequest,
421 };
422
423 /* Globals */
424 static DC dc;
425 static XWindow xw;
426 static Term term;
427 static CSIEscape csiescseq;
428 static STREscape strescseq;
429 static int cmdfd;
430 static pid_t pid;
431 static Selection sel;
432 static int iofd = -1;
433 static char **opt_cmd = NULL;
434 static char *opt_io = NULL;
435 static char *opt_title = NULL;
436 static char *opt_embed = NULL;
437 static char *opt_class = NULL;
438 static char *opt_font = NULL;
439
440 static char *usedfont = NULL;
441 static int usedfontsize = 0;
442
443 /* Font Ring Cache */
444 enum {
445 FRC_NORMAL,
446 FRC_ITALIC,
447 FRC_BOLD,
448 FRC_ITALICBOLD
449 };
450
451 typedef struct {
452 XftFont *font;
453 long c;
454 int flags;
455 } Fontcache;
456
457 /*
458 * Fontcache is a ring buffer, with frccur as current position and frclen as
459 * the current length of used elements.
460 */
461
462 static Fontcache frc[1024];
463 static int frccur = -1, frclen = 0;
464
465 ssize_t
466 xwrite(int fd, char *s, size_t len) {
467 size_t aux = len;
468
469 while(len > 0) {
470 ssize_t r = write(fd, s, len);
471 if(r < 0)
472 return r;
473 len -= r;
474 s += r;
475 }
476 return aux;
477 }
478
479 void *
480 xmalloc(size_t len) {
481 void *p = malloc(len);
482
483 if(!p)
484 die("Out of memory\n");
485
486 return p;
487 }
488
489 void *
490 xrealloc(void *p, size_t len) {
491 if((p = realloc(p, len)) == NULL)
492 die("Out of memory\n");
493
494 return p;
495 }
496
497 void *
498 xcalloc(size_t nmemb, size_t size) {
499 void *p = calloc(nmemb, size);
500
501 if(!p)
502 die("Out of memory\n");
503
504 return p;
505 }
506
507 int
508 utf8decode(char *s, long *u) {
509 uchar c;
510 int i, n, rtn;
511
512 rtn = 1;
513 c = *s;
514 if(~c & B7) { /* 0xxxxxxx */
515 *u = c;
516 return rtn;
517 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
518 *u = c&(B4|B3|B2|B1|B0);
519 n = 1;
520 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
521 *u = c&(B3|B2|B1|B0);
522 n = 2;
523 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
524 *u = c & (B2|B1|B0);
525 n = 3;
526 } else {
527 goto invalid;
528 }
529
530 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
531 c = *s;
532 if((c & (B7|B6)) != B7) /* 10xxxxxx */
533 goto invalid;
534 *u <<= 6;
535 *u |= c & (B5|B4|B3|B2|B1|B0);
536 }
537
538 if((n == 1 && *u < 0x80) ||
539 (n == 2 && *u < 0x800) ||
540 (n == 3 && *u < 0x10000) ||
541 (*u >= 0xD800 && *u <= 0xDFFF)) {
542 goto invalid;
543 }
544
545 return rtn;
546 invalid:
547 *u = 0xFFFD;
548
549 return rtn;
550 }
551
552 int
553 utf8encode(long *u, char *s) {
554 uchar *sp;
555 ulong uc;
556 int i, n;
557
558 sp = (uchar *)s;
559 uc = *u;
560 if(uc < 0x80) {
561 *sp = uc; /* 0xxxxxxx */
562 return 1;
563 } else if(*u < 0x800) {
564 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
565 n = 1;
566 } else if(uc < 0x10000) {
567 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
568 n = 2;
569 } else if(uc <= 0x10FFFF) {
570 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
571 n = 3;
572 } else {
573 goto invalid;
574 }
575
576 for(i=n,++sp; i>0; --i,++sp)
577 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
578
579 return n+1;
580 invalid:
581 /* U+FFFD */
582 *s++ = '\xEF';
583 *s++ = '\xBF';
584 *s = '\xBD';
585
586 return 3;
587 }
588
589 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
590 UTF-8 otherwise return 0 */
591 int
592 isfullutf8(char *s, int b) {
593 uchar *c1, *c2, *c3;
594
595 c1 = (uchar *)s;
596 c2 = (uchar *)++s;
597 c3 = (uchar *)++s;
598 if(b < 1) {
599 return 0;
600 } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
601 return 0;
602 } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
603 ((b == 1) ||
604 ((b == 2) && (*c2&(B7|B6)) == B7))) {
605 return 0;
606 } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
607 ((b == 1) ||
608 ((b == 2) && (*c2&(B7|B6)) == B7) ||
609 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
610 return 0;
611 } else {
612 return 1;
613 }
614 }
615
616 int
617 utf8size(char *s) {
618 uchar c = *s;
619
620 if(~c&B7) {
621 return 1;
622 } else if((c&(B7|B6|B5)) == (B7|B6)) {
623 return 2;
624 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
625 return 3;
626 } else {
627 return 4;
628 }
629 }
630
631 void
632 selinit(void) {
633 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
634 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
635 sel.mode = 0;
636 sel.bx = -1;
637 sel.clip = NULL;
638 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
639 if(sel.xtarget == None)
640 sel.xtarget = XA_STRING;
641 }
642
643 static int
644 x2col(int x) {
645 x -= borderpx;
646 x /= xw.cw;
647
648 return LIMIT(x, 0, term.col-1);
649 }
650
651 static int
652 y2row(int y) {
653 y -= borderpx;
654 y /= xw.ch;
655
656 return LIMIT(y, 0, term.row-1);
657 }
658
659 static inline bool
660 selected(int x, int y) {
661 int bx, ex;
662
663 if(sel.ey == y && sel.by == y) {
664 bx = MIN(sel.bx, sel.ex);
665 ex = MAX(sel.bx, sel.ex);
666
667 return BETWEEN(x, bx, ex);
668 }
669
670 if(sel.type == SEL_RECTANGULAR) {
671 return ((sel.b.y <= y && y <= sel.e.y)
672 && (sel.b.x <= x && x <= sel.e.x));
673 }
674 return ((sel.b.y < y && y < sel.e.y)
675 || (y == sel.e.y && x <= sel.e.x))
676 || (y == sel.b.y && x >= sel.b.x
677 && (x <= sel.e.x || sel.b.y != sel.e.y));
678 }
679
680 void
681 selsnap(int mode, int *x, int *y, int direction) {
682 switch(mode) {
683 case SNAP_WORD:
684 while(*x > 0 && *x < term.col-1
685 && term.line[*y][*x + direction].c[0] != ' ') {
686 *x += direction;
687 }
688 break;
689 case SNAP_LINE:
690 *x = (direction < 0) ? 0 : term.col - 1;
691 break;
692 default:
693 break;
694 }
695 }
696
697 void
698 getbuttoninfo(XEvent *e) {
699 int type;
700 uint state = e->xbutton.state &~Button1Mask;
701
702 sel.alt = IS_SET(MODE_ALTSCREEN);
703
704 sel.ex = x2col(e->xbutton.x);
705 sel.ey = y2row(e->xbutton.y);
706
707 if (sel.by < sel.ey
708 || (sel.by == sel.ey && sel.bx < sel.ex)) {
709 selsnap(sel.snap, &sel.bx, &sel.by, -1);
710 selsnap(sel.snap, &sel.ex, &sel.ey, +1);
711 } else {
712 selsnap(sel.snap, &sel.ex, &sel.ey, -1);
713 selsnap(sel.snap, &sel.bx, &sel.by, +1);
714 }
715
716 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
717 sel.b.y = MIN(sel.by, sel.ey);
718 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
719 sel.e.y = MAX(sel.by, sel.ey);
720
721 sel.type = SEL_REGULAR;
722 for(type = 1; type < LEN(selmasks); ++type) {
723 if(match(selmasks[type], state)) {
724 sel.type = type;
725 break;
726 }
727 }
728 }
729
730 void
731 mousereport(XEvent *e) {
732 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
733 button = e->xbutton.button, state = e->xbutton.state,
734 len;
735 char buf[40];
736 static int ob, ox, oy;
737
738 /* from urxvt */
739 if(e->xbutton.type == MotionNotify) {
740 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
741 return;
742 button = ob + 32;
743 ox = x, oy = y;
744 } else if(!IS_SET(MODE_MOUSESGR)
745 && (e->xbutton.type == ButtonRelease
746 || button == AnyButton)) {
747 button = 3;
748 } else {
749 button -= Button1;
750 if(button >= 3)
751 button += 64 - 3;
752 if(e->xbutton.type == ButtonPress) {
753 ob = button;
754 ox = x, oy = y;
755 }
756 }
757
758 button += (state & ShiftMask ? 4 : 0)
759 + (state & Mod4Mask ? 8 : 0)
760 + (state & ControlMask ? 16 : 0);
761
762 len = 0;
763 if(IS_SET(MODE_MOUSESGR)) {
764 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
765 button, x+1, y+1,
766 e->xbutton.type == ButtonRelease ? 'm' : 'M');
767 } else if(x < 223 && y < 223) {
768 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
769 32+button, 32+x+1, 32+y+1);
770 } else {
771 return;
772 }
773
774 ttywrite(buf, len);
775 }
776
777 void
778 bpress(XEvent *e) {
779 struct timeval now;
780 Mousekey *mk;
781
782 if(IS_SET(MODE_MOUSE)) {
783 mousereport(e);
784 return;
785 }
786
787 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
788 if(e->xbutton.button == mk->b
789 && match(mk->mask, e->xbutton.state)) {
790 ttywrite(mk->s, strlen(mk->s));
791 if(IS_SET(MODE_ECHO))
792 techo(mk->s, strlen(mk->s));
793 return;
794 }
795 }
796
797 if(e->xbutton.button == Button1) {
798 gettimeofday(&now, NULL);
799
800 /* Clear previous selection, logically and visually. */
801 if(sel.bx != -1) {
802 sel.bx = -1;
803 tsetdirt(sel.b.y, sel.e.y);
804 draw();
805 }
806 sel.mode = 1;
807 sel.type = SEL_REGULAR;
808 sel.ex = sel.bx = x2col(e->xbutton.x);
809 sel.ey = sel.by = y2row(e->xbutton.y);
810
811 /*
812 * If the user clicks below predefined timeouts specific
813 * snapping behaviour is exposed.
814 */
815 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
816 sel.snap = SNAP_LINE;
817 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
818 sel.snap = SNAP_WORD;
819 } else {
820 sel.snap = 0;
821 }
822 selsnap(sel.snap, &sel.bx, &sel.by, -1);
823 selsnap(sel.snap, &sel.ex, &sel.ey, 1);
824 sel.b.x = sel.bx;
825 sel.b.y = sel.by;
826 sel.e.x = sel.ex;
827 sel.e.y = sel.ey;
828
829 /*
830 * Draw selection, unless it's regular and we don't want to
831 * make clicks visible
832 */
833 if(sel.snap != 0) {
834 sel.mode++;
835 tsetdirt(sel.b.y, sel.e.y);
836 draw();
837 }
838 sel.tclick2 = sel.tclick1;
839 sel.tclick1 = now;
840 }
841 }
842
843 void
844 selcopy(void) {
845 char *str, *ptr;
846 int x, y, bufsize, size;
847 Glyph *gp, *last;
848
849 if(sel.bx == -1) {
850 str = NULL;
851 } else {
852 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
853 ptr = str = xmalloc(bufsize);
854
855 /* append every set & selected glyph to the selection */
856 for(y = sel.b.y; y < sel.e.y + 1; y++) {
857 gp = &term.line[y][0];
858 last = gp + term.col;
859
860 while(--last >= gp && !(selected(last - gp, y) && \
861 strcmp(last->c, " ") != 0))
862 /* nothing */;
863
864 for(x = 0; gp <= last; x++, ++gp) {
865 if(!selected(x, y))
866 continue;
867
868 size = utf8size(gp->c);
869 memcpy(ptr, gp->c, size);
870 ptr += size;
871 }
872
873 /*
874 * Copy and pasting of line endings is inconsistent
875 * in the inconsistent terminal and GUI world.
876 * The best solution seems like to produce '\n' when
877 * something is copied from st and convert '\n' to
878 * '\r', when something to be pasted is received by
879 * st.
880 * FIXME: Fix the computer world.
881 */
882 if(y < sel.e.y && !((gp-1)->mode & ATTR_WRAP))
883 *ptr++ = '\n';
884 }
885 *ptr = 0;
886 }
887 xsetsel(str);
888 }
889
890 void
891 selnotify(XEvent *e) {
892 ulong nitems, ofs, rem;
893 int format;
894 uchar *data, *last, *repl;
895 Atom type;
896
897 ofs = 0;
898 do {
899 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
900 False, AnyPropertyType, &type, &format,
901 &nitems, &rem, &data)) {
902 fprintf(stderr, "Clipboard allocation failed\n");
903 return;
904 }
905
906 /*
907 * As seen in selcopy:
908 * Line endings are inconsistent in the terminal and GUI world
909 * copy and pasting. When receiving some selection data,
910 * replace all '\n' with '\r'.
911 * FIXME: Fix the computer world.
912 */
913 repl = data;
914 last = data + nitems * format / 8;
915 while((repl = memchr(repl, '\n', last - repl))) {
916 *repl++ = '\r';
917 }
918
919 ttywrite((const char *)data, nitems * format / 8);
920 XFree(data);
921 /* number of 32-bit chunks returned */
922 ofs += nitems * format / 32;
923 } while(rem > 0);
924 }
925
926 void
927 selpaste(const Arg *dummy) {
928 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
929 xw.win, CurrentTime);
930 }
931
932 void
933 clippaste(const Arg *dummy) {
934 Atom clipboard;
935
936 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
937 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
938 xw.win, CurrentTime);
939 }
940
941 void
942 selclear(XEvent *e) {
943 if(sel.bx == -1)
944 return;
945 sel.bx = -1;
946 tsetdirt(sel.b.y, sel.e.y);
947 }
948
949 void
950 selrequest(XEvent *e) {
951 XSelectionRequestEvent *xsre;
952 XSelectionEvent xev;
953 Atom xa_targets, string;
954
955 xsre = (XSelectionRequestEvent *) e;
956 xev.type = SelectionNotify;
957 xev.requestor = xsre->requestor;
958 xev.selection = xsre->selection;
959 xev.target = xsre->target;
960 xev.time = xsre->time;
961 /* reject */
962 xev.property = None;
963
964 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
965 if(xsre->target == xa_targets) {
966 /* respond with the supported type */
967 string = sel.xtarget;
968 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
969 XA_ATOM, 32, PropModeReplace,
970 (uchar *) &string, 1);
971 xev.property = xsre->property;
972 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
973 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
974 xsre->target, 8, PropModeReplace,
975 (uchar *) sel.clip, strlen(sel.clip));
976 xev.property = xsre->property;
977 }
978
979 /* all done, send a notification to the listener */
980 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
981 fprintf(stderr, "Error sending SelectionNotify event\n");
982 }
983
984 void
985 xsetsel(char *str) {
986 /* register the selection for both the clipboard and the primary */
987 Atom clipboard;
988
989 free(sel.clip);
990 sel.clip = str;
991
992 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
993
994 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
995 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
996 }
997
998 void
999 brelease(XEvent *e) {
1000 if(IS_SET(MODE_MOUSE)) {
1001 mousereport(e);
1002 return;
1003 }
1004
1005 if(e->xbutton.button == Button2) {
1006 selpaste(NULL);
1007 } else if(e->xbutton.button == Button1) {
1008 if(sel.mode < 2) {
1009 sel.bx = -1;
1010 } else {
1011 getbuttoninfo(e);
1012 selcopy();
1013 }
1014 sel.mode = 0;
1015 term.dirty[sel.ey] = 1;
1016 }
1017 }
1018
1019 void
1020 bmotion(XEvent *e) {
1021 int oldey, oldex, oldsby, oldsey;
1022
1023 if(IS_SET(MODE_MOUSE)) {
1024 mousereport(e);
1025 return;
1026 }
1027
1028 if(!sel.mode)
1029 return;
1030
1031 sel.mode++;
1032 oldey = sel.ey;
1033 oldex = sel.ex;
1034 oldsby = sel.b.y;
1035 oldsey = sel.e.y;
1036 getbuttoninfo(e);
1037
1038 if(oldey != sel.ey || oldex != sel.ex) {
1039 tsetdirt(MIN(sel.b.y, oldsby), MAX(sel.e.y, oldsey));
1040 }
1041 }
1042
1043 void
1044 die(const char *errstr, ...) {
1045 va_list ap;
1046
1047 va_start(ap, errstr);
1048 vfprintf(stderr, errstr, ap);
1049 va_end(ap);
1050 exit(EXIT_FAILURE);
1051 }
1052
1053 void
1054 execsh(void) {
1055 char **args;
1056 char *envshell = getenv("SHELL");
1057 const struct passwd *pass = getpwuid(getuid());
1058 char buf[sizeof(long) * 8 + 1];
1059
1060 unsetenv("COLUMNS");
1061 unsetenv("LINES");
1062 unsetenv("TERMCAP");
1063
1064 if(pass) {
1065 setenv("LOGNAME", pass->pw_name, 1);
1066 setenv("USER", pass->pw_name, 1);
1067 setenv("SHELL", pass->pw_shell, 0);
1068 setenv("HOME", pass->pw_dir, 0);
1069 }
1070
1071 snprintf(buf, sizeof(buf), "%lu", xw.win);
1072 setenv("WINDOWID", buf, 1);
1073
1074 signal(SIGCHLD, SIG_DFL);
1075 signal(SIGHUP, SIG_DFL);
1076 signal(SIGINT, SIG_DFL);
1077 signal(SIGQUIT, SIG_DFL);
1078 signal(SIGTERM, SIG_DFL);
1079 signal(SIGALRM, SIG_DFL);
1080
1081 DEFAULT(envshell, shell);
1082 setenv("TERM", termname, 1);
1083 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1084 execvp(args[0], args);
1085 exit(EXIT_FAILURE);
1086 }
1087
1088 void
1089 sigchld(int a) {
1090 int stat = 0;
1091
1092 if(waitpid(pid, &stat, 0) < 0)
1093 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1094
1095 if(WIFEXITED(stat)) {
1096 exit(WEXITSTATUS(stat));
1097 } else {
1098 exit(EXIT_FAILURE);
1099 }
1100 }
1101
1102 void
1103 ttynew(void) {
1104 int m, s;
1105 struct winsize w = {term.row, term.col, 0, 0};
1106
1107 /* seems to work fine on linux, openbsd and freebsd */
1108 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1109 die("openpty failed: %s\n", SERRNO);
1110
1111 switch(pid = fork()) {
1112 case -1:
1113 die("fork failed\n");
1114 break;
1115 case 0:
1116 setsid(); /* create a new process group */
1117 dup2(s, STDIN_FILENO);
1118 dup2(s, STDOUT_FILENO);
1119 dup2(s, STDERR_FILENO);
1120 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1121 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1122 close(s);
1123 close(m);
1124 execsh();
1125 break;
1126 default:
1127 close(s);
1128 cmdfd = m;
1129 signal(SIGCHLD, sigchld);
1130 if(opt_io) {
1131 iofd = (!strcmp(opt_io, "-")) ?
1132 STDOUT_FILENO :
1133 open(opt_io, O_WRONLY | O_CREAT, 0666);
1134 if(iofd < 0) {
1135 fprintf(stderr, "Error opening %s:%s\n",
1136 opt_io, strerror(errno));
1137 }
1138 }
1139 }
1140 }
1141
1142 void
1143 dump(char c) {
1144 static int col;
1145
1146 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1147 if(++col % 10 == 0)
1148 fprintf(stderr, "\n");
1149 }
1150
1151 void
1152 ttyread(void) {
1153 static char buf[BUFSIZ];
1154 static int buflen = 0;
1155 char *ptr;
1156 char s[UTF_SIZ];
1157 int charsize; /* size of utf8 char in bytes */
1158 long utf8c;
1159 int ret;
1160
1161 /* append read bytes to unprocessed bytes */
1162 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1163 die("Couldn't read from shell: %s\n", SERRNO);
1164
1165 /* process every complete utf8 char */
1166 buflen += ret;
1167 ptr = buf;
1168 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1169 charsize = utf8decode(ptr, &utf8c);
1170 utf8encode(&utf8c, s);
1171 tputc(s, charsize);
1172 ptr += charsize;
1173 buflen -= charsize;
1174 }
1175
1176 /* keep any uncomplete utf8 char for the next call */
1177 memmove(buf, ptr, buflen);
1178 }
1179
1180 void
1181 ttywrite(const char *s, size_t n) {
1182 if(write(cmdfd, s, n) == -1)
1183 die("write error on tty: %s\n", SERRNO);
1184 }
1185
1186 void
1187 ttyresize(void) {
1188 struct winsize w;
1189
1190 w.ws_row = term.row;
1191 w.ws_col = term.col;
1192 w.ws_xpixel = xw.tw;
1193 w.ws_ypixel = xw.th;
1194 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1195 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1196 }
1197
1198 int
1199 tattrset(int attr) {
1200 int i, j;
1201
1202 for(i = 0; i < term.row-1; i++) {
1203 for(j = 0; j < term.col-1; j++) {
1204 if(term.line[i][j].mode & attr)
1205 return 1;
1206 }
1207 }
1208
1209 return 0;
1210 }
1211
1212 void
1213 tsetdirt(int top, int bot) {
1214 int i;
1215
1216 LIMIT(top, 0, term.row-1);
1217 LIMIT(bot, 0, term.row-1);
1218
1219 for(i = top; i <= bot; i++)
1220 term.dirty[i] = 1;
1221 }
1222
1223 void
1224 tsetdirtattr(int attr) {
1225 int i, j;
1226
1227 for(i = 0; i < term.row-1; i++) {
1228 for(j = 0; j < term.col-1; j++) {
1229 if(term.line[i][j].mode & attr) {
1230 tsetdirt(i, i);
1231 break;
1232 }
1233 }
1234 }
1235 }
1236
1237 void
1238 tfulldirt(void) {
1239 tsetdirt(0, term.row-1);
1240 }
1241
1242 void
1243 tcursor(int mode) {
1244 static TCursor c;
1245
1246 if(mode == CURSOR_SAVE) {
1247 c = term.c;
1248 } else if(mode == CURSOR_LOAD) {
1249 term.c = c;
1250 tmoveto(c.x, c.y);
1251 }
1252 }
1253
1254 void
1255 treset(void) {
1256 uint i;
1257
1258 term.c = (TCursor){{
1259 .mode = ATTR_NULL,
1260 .fg = defaultfg,
1261 .bg = defaultbg
1262 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1263
1264 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1265 for(i = tabspaces; i < term.col; i += tabspaces)
1266 term.tabs[i] = 1;
1267 term.top = 0;
1268 term.bot = term.row - 1;
1269 term.mode = MODE_WRAP;
1270
1271 tclearregion(0, 0, term.col-1, term.row-1);
1272 tmoveto(0, 0);
1273 tcursor(CURSOR_SAVE);
1274 }
1275
1276 void
1277 tnew(int col, int row) {
1278 memset(&term, 0, sizeof(Term));
1279 tresize(col, row);
1280 term.numlock = 1;
1281
1282 treset();
1283 }
1284
1285 void
1286 tswapscreen(void) {
1287 Line *tmp = term.line;
1288
1289 term.line = term.alt;
1290 term.alt = tmp;
1291 term.mode ^= MODE_ALTSCREEN;
1292 tfulldirt();
1293 }
1294
1295 void
1296 tscrolldown(int orig, int n) {
1297 int i;
1298 Line temp;
1299
1300 LIMIT(n, 0, term.bot-orig+1);
1301
1302 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1303
1304 for(i = term.bot; i >= orig+n; i--) {
1305 temp = term.line[i];
1306 term.line[i] = term.line[i-n];
1307 term.line[i-n] = temp;
1308
1309 term.dirty[i] = 1;
1310 term.dirty[i-n] = 1;
1311 }
1312
1313 selscroll(orig, n);
1314 }
1315
1316 void
1317 tscrollup(int orig, int n) {
1318 int i;
1319 Line temp;
1320 LIMIT(n, 0, term.bot-orig+1);
1321
1322 tclearregion(0, orig, term.col-1, orig+n-1);
1323
1324 for(i = orig; i <= term.bot-n; i++) {
1325 temp = term.line[i];
1326 term.line[i] = term.line[i+n];
1327 term.line[i+n] = temp;
1328
1329 term.dirty[i] = 1;
1330 term.dirty[i+n] = 1;
1331 }
1332
1333 selscroll(orig, -n);
1334 }
1335
1336 void
1337 selscroll(int orig, int n) {
1338 if(sel.bx == -1)
1339 return;
1340
1341 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1342 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1343 sel.bx = -1;
1344 return;
1345 }
1346 if(sel.type == SEL_RECTANGULAR) {
1347 if(sel.by < term.top)
1348 sel.by = term.top;
1349 if(sel.ey > term.bot)
1350 sel.ey = term.bot;
1351 } else {
1352 if(sel.by < term.top) {
1353 sel.by = term.top;
1354 sel.bx = 0;
1355 }
1356 if(sel.ey > term.bot) {
1357 sel.ey = term.bot;
1358 sel.ex = term.col;
1359 }
1360 }
1361 sel.b.y = sel.by, sel.b.x = sel.bx;
1362 sel.e.y = sel.ey, sel.e.x = sel.ex;
1363 }
1364 }
1365
1366 void
1367 tnewline(int first_col) {
1368 int y = term.c.y;
1369
1370 if(y == term.bot) {
1371 tscrollup(term.top, 1);
1372 } else {
1373 y++;
1374 }
1375 tmoveto(first_col ? 0 : term.c.x, y);
1376 }
1377
1378 void
1379 csiparse(void) {
1380 char *p = csiescseq.buf, *np;
1381 long int v;
1382
1383 csiescseq.narg = 0;
1384 if(*p == '?') {
1385 csiescseq.priv = 1;
1386 p++;
1387 }
1388
1389 csiescseq.buf[csiescseq.len] = '\0';
1390 while(p < csiescseq.buf+csiescseq.len) {
1391 np = NULL;
1392 v = strtol(p, &np, 10);
1393 if(np == p)
1394 v = 0;
1395 if(v == LONG_MAX || v == LONG_MIN)
1396 v = -1;
1397 csiescseq.arg[csiescseq.narg++] = v;
1398 p = np;
1399 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1400 break;
1401 p++;
1402 }
1403 csiescseq.mode = *p;
1404 }
1405
1406 /* for absolute user moves, when decom is set */
1407 void
1408 tmoveato(int x, int y) {
1409 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1410 }
1411
1412 void
1413 tmoveto(int x, int y) {
1414 int miny, maxy;
1415
1416 if(term.c.state & CURSOR_ORIGIN) {
1417 miny = term.top;
1418 maxy = term.bot;
1419 } else {
1420 miny = 0;
1421 maxy = term.row - 1;
1422 }
1423 LIMIT(x, 0, term.col-1);
1424 LIMIT(y, miny, maxy);
1425 term.c.state &= ~CURSOR_WRAPNEXT;
1426 term.c.x = x;
1427 term.c.y = y;
1428 }
1429
1430 void
1431 tsetchar(char *c, Glyph *attr, int x, int y) {
1432 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1433 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1434 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1435 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1436 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1437 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1438 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1439 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1440 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1441 };
1442
1443 /*
1444 * The table is proudly stolen from rxvt.
1445 */
1446 if(attr->mode & ATTR_GFX) {
1447 if(c[0] >= 0x41 && c[0] <= 0x7e
1448 && vt100_0[c[0] - 0x41]) {
1449 c = vt100_0[c[0] - 0x41];
1450 }
1451 }
1452
1453 term.dirty[y] = 1;
1454 term.line[y][x] = *attr;
1455 memcpy(term.line[y][x].c, c, UTF_SIZ);
1456 }
1457
1458 void
1459 tclearregion(int x1, int y1, int x2, int y2) {
1460 int x, y, temp;
1461
1462 if(x1 > x2)
1463 temp = x1, x1 = x2, x2 = temp;
1464 if(y1 > y2)
1465 temp = y1, y1 = y2, y2 = temp;
1466
1467 LIMIT(x1, 0, term.col-1);
1468 LIMIT(x2, 0, term.col-1);
1469 LIMIT(y1, 0, term.row-1);
1470 LIMIT(y2, 0, term.row-1);
1471
1472 for(y = y1; y <= y2; y++) {
1473 term.dirty[y] = 1;
1474 for(x = x1; x <= x2; x++) {
1475 if(selected(x, y))
1476 selclear(NULL);
1477 term.line[y][x] = term.c.attr;
1478 memcpy(term.line[y][x].c, " ", 2);
1479 }
1480 }
1481 }
1482
1483 void
1484 tdeletechar(int n) {
1485 int src = term.c.x + n;
1486 int dst = term.c.x;
1487 int size = term.col - src;
1488
1489 term.dirty[term.c.y] = 1;
1490
1491 if(src >= term.col) {
1492 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1493 return;
1494 }
1495
1496 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1497 size * sizeof(Glyph));
1498 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1499 }
1500
1501 void
1502 tinsertblank(int n) {
1503 int src = term.c.x;
1504 int dst = src + n;
1505 int size = term.col - dst;
1506
1507 term.dirty[term.c.y] = 1;
1508
1509 if(dst >= term.col) {
1510 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1511 return;
1512 }
1513
1514 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1515 size * sizeof(Glyph));
1516 tclearregion(src, term.c.y, dst - 1, term.c.y);
1517 }
1518
1519 void
1520 tinsertblankline(int n) {
1521 if(term.c.y < term.top || term.c.y > term.bot)
1522 return;
1523
1524 tscrolldown(term.c.y, n);
1525 }
1526
1527 void
1528 tdeleteline(int n) {
1529 if(term.c.y < term.top || term.c.y > term.bot)
1530 return;
1531
1532 tscrollup(term.c.y, n);
1533 }
1534
1535 void
1536 tsetattr(int *attr, int l) {
1537 int i;
1538
1539 for(i = 0; i < l; i++) {
1540 switch(attr[i]) {
1541 case 0:
1542 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1543 | ATTR_BOLD | ATTR_ITALIC \
1544 | ATTR_BLINK);
1545 term.c.attr.fg = defaultfg;
1546 term.c.attr.bg = defaultbg;
1547 break;
1548 case 1:
1549 term.c.attr.mode |= ATTR_BOLD;
1550 break;
1551 case 3:
1552 term.c.attr.mode |= ATTR_ITALIC;
1553 break;
1554 case 4:
1555 term.c.attr.mode |= ATTR_UNDERLINE;
1556 break;
1557 case 5: /* slow blink */
1558 case 6: /* rapid blink */
1559 term.c.attr.mode |= ATTR_BLINK;
1560 break;
1561 case 7:
1562 term.c.attr.mode |= ATTR_REVERSE;
1563 break;
1564 case 21:
1565 case 22:
1566 term.c.attr.mode &= ~ATTR_BOLD;
1567 break;
1568 case 23:
1569 term.c.attr.mode &= ~ATTR_ITALIC;
1570 break;
1571 case 24:
1572 term.c.attr.mode &= ~ATTR_UNDERLINE;
1573 break;
1574 case 25:
1575 case 26:
1576 term.c.attr.mode &= ~ATTR_BLINK;
1577 break;
1578 case 27:
1579 term.c.attr.mode &= ~ATTR_REVERSE;
1580 break;
1581 case 38:
1582 if(i + 2 < l && attr[i + 1] == 5) {
1583 i += 2;
1584 if(BETWEEN(attr[i], 0, 255)) {
1585 term.c.attr.fg = attr[i];
1586 } else {
1587 fprintf(stderr,
1588 "erresc: bad fgcolor %d\n",
1589 attr[i]);
1590 }
1591 } else {
1592 fprintf(stderr,
1593 "erresc(38): gfx attr %d unknown\n",
1594 attr[i]);
1595 }
1596 break;
1597 case 39:
1598 term.c.attr.fg = defaultfg;
1599 break;
1600 case 48:
1601 if(i + 2 < l && attr[i + 1] == 5) {
1602 i += 2;
1603 if(BETWEEN(attr[i], 0, 255)) {
1604 term.c.attr.bg = attr[i];
1605 } else {
1606 fprintf(stderr,
1607 "erresc: bad bgcolor %d\n",
1608 attr[i]);
1609 }
1610 } else {
1611 fprintf(stderr,
1612 "erresc(48): gfx attr %d unknown\n",
1613 attr[i]);
1614 }
1615 break;
1616 case 49:
1617 term.c.attr.bg = defaultbg;
1618 break;
1619 default:
1620 if(BETWEEN(attr[i], 30, 37)) {
1621 term.c.attr.fg = attr[i] - 30;
1622 } else if(BETWEEN(attr[i], 40, 47)) {
1623 term.c.attr.bg = attr[i] - 40;
1624 } else if(BETWEEN(attr[i], 90, 97)) {
1625 term.c.attr.fg = attr[i] - 90 + 8;
1626 } else if(BETWEEN(attr[i], 100, 107)) {
1627 term.c.attr.bg = attr[i] - 100 + 8;
1628 } else {
1629 fprintf(stderr,
1630 "erresc(default): gfx attr %d unknown\n",
1631 attr[i]), csidump();
1632 }
1633 break;
1634 }
1635 }
1636 }
1637
1638 void
1639 tsetscroll(int t, int b) {
1640 int temp;
1641
1642 LIMIT(t, 0, term.row-1);
1643 LIMIT(b, 0, term.row-1);
1644 if(t > b) {
1645 temp = t;
1646 t = b;
1647 b = temp;
1648 }
1649 term.top = t;
1650 term.bot = b;
1651 }
1652
1653 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1654
1655 void
1656 tsetmode(bool priv, bool set, int *args, int narg) {
1657 int *lim, mode;
1658 bool alt;
1659
1660 for(lim = args + narg; args < lim; ++args) {
1661 if(priv) {
1662 switch(*args) {
1663 break;
1664 case 1: /* DECCKM -- Cursor key */
1665 MODBIT(term.mode, set, MODE_APPCURSOR);
1666 break;
1667 case 5: /* DECSCNM -- Reverse video */
1668 mode = term.mode;
1669 MODBIT(term.mode, set, MODE_REVERSE);
1670 if(mode != term.mode)
1671 redraw(REDRAW_TIMEOUT);
1672 break;
1673 case 6: /* DECOM -- Origin */
1674 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1675 tmoveato(0, 0);
1676 break;
1677 case 7: /* DECAWM -- Auto wrap */
1678 MODBIT(term.mode, set, MODE_WRAP);
1679 break;
1680 case 0: /* Error (IGNORED) */
1681 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1682 case 3: /* DECCOLM -- Column (IGNORED) */
1683 case 4: /* DECSCLM -- Scroll (IGNORED) */
1684 case 8: /* DECARM -- Auto repeat (IGNORED) */
1685 case 18: /* DECPFF -- Printer feed (IGNORED) */
1686 case 19: /* DECPEX -- Printer extent (IGNORED) */
1687 case 42: /* DECNRCM -- National characters (IGNORED) */
1688 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1689 break;
1690 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1691 MODBIT(term.mode, !set, MODE_HIDE);
1692 break;
1693 case 1000: /* 1000,1002: enable xterm mouse report */
1694 MODBIT(term.mode, set, MODE_MOUSEBTN);
1695 MODBIT(term.mode, 0, MODE_MOUSEMOTION);
1696 break;
1697 case 1002:
1698 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1699 MODBIT(term.mode, 0, MODE_MOUSEBTN);
1700 break;
1701 case 1006:
1702 MODBIT(term.mode, set, MODE_MOUSESGR);
1703 break;
1704 case 1034:
1705 MODBIT(term.mode, set, MODE_8BIT);
1706 break;
1707 case 1049: /* = 1047 and 1048 */
1708 case 47:
1709 case 1047:
1710 if (!allowaltscreen)
1711 break;
1712
1713 alt = IS_SET(MODE_ALTSCREEN);
1714 if(alt) {
1715 tclearregion(0, 0, term.col-1,
1716 term.row-1);
1717 }
1718 if(set ^ alt) /* set is always 1 or 0 */
1719 tswapscreen();
1720 if(*args != 1049)
1721 break;
1722 /* FALLTRU */
1723 case 1048:
1724 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1725 break;
1726 default:
1727 fprintf(stderr,
1728 "erresc: unknown private set/reset mode %d\n",
1729 *args);
1730 break;
1731 }
1732 } else {
1733 switch(*args) {
1734 case 0: /* Error (IGNORED) */
1735 break;
1736 case 2: /* KAM -- keyboard action */
1737 MODBIT(term.mode, set, MODE_KBDLOCK);
1738 break;
1739 case 4: /* IRM -- Insertion-replacement */
1740 MODBIT(term.mode, set, MODE_INSERT);
1741 break;
1742 case 12: /* SRM -- Send/Receive */
1743 MODBIT(term.mode, !set, MODE_ECHO);
1744 break;
1745 case 20: /* LNM -- Linefeed/new line */
1746 MODBIT(term.mode, set, MODE_CRLF);
1747 break;
1748 default:
1749 fprintf(stderr,
1750 "erresc: unknown set/reset mode %d\n",
1751 *args);
1752 break;
1753 }
1754 }
1755 }
1756 }
1757 #undef MODBIT
1758
1759
1760 void
1761 csihandle(void) {
1762 switch(csiescseq.mode) {
1763 default:
1764 unknown:
1765 fprintf(stderr, "erresc: unknown csi ");
1766 csidump();
1767 /* die(""); */
1768 break;
1769 case '@': /* ICH -- Insert <n> blank char */
1770 DEFAULT(csiescseq.arg[0], 1);
1771 tinsertblank(csiescseq.arg[0]);
1772 break;
1773 case 'A': /* CUU -- Cursor <n> Up */
1774 DEFAULT(csiescseq.arg[0], 1);
1775 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1776 break;
1777 case 'B': /* CUD -- Cursor <n> Down */
1778 case 'e': /* VPR --Cursor <n> Down */
1779 DEFAULT(csiescseq.arg[0], 1);
1780 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1781 break;
1782 case 'c': /* DA -- Device Attributes */
1783 if(csiescseq.arg[0] == 0)
1784 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1785 break;
1786 case 'C': /* CUF -- Cursor <n> Forward */
1787 case 'a': /* HPR -- Cursor <n> Forward */
1788 DEFAULT(csiescseq.arg[0], 1);
1789 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1790 break;
1791 case 'D': /* CUB -- Cursor <n> Backward */
1792 DEFAULT(csiescseq.arg[0], 1);
1793 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1794 break;
1795 case 'E': /* CNL -- Cursor <n> Down and first col */
1796 DEFAULT(csiescseq.arg[0], 1);
1797 tmoveto(0, term.c.y+csiescseq.arg[0]);
1798 break;
1799 case 'F': /* CPL -- Cursor <n> Up and first col */
1800 DEFAULT(csiescseq.arg[0], 1);
1801 tmoveto(0, term.c.y-csiescseq.arg[0]);
1802 break;
1803 case 'g': /* TBC -- Tabulation clear */
1804 switch(csiescseq.arg[0]) {
1805 case 0: /* clear current tab stop */
1806 term.tabs[term.c.x] = 0;
1807 break;
1808 case 3: /* clear all the tabs */
1809 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1810 break;
1811 default:
1812 goto unknown;
1813 }
1814 break;
1815 case 'G': /* CHA -- Move to <col> */
1816 case '`': /* HPA */
1817 DEFAULT(csiescseq.arg[0], 1);
1818 tmoveto(csiescseq.arg[0]-1, term.c.y);
1819 break;
1820 case 'H': /* CUP -- Move to <row> <col> */
1821 case 'f': /* HVP */
1822 DEFAULT(csiescseq.arg[0], 1);
1823 DEFAULT(csiescseq.arg[1], 1);
1824 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1825 break;
1826 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1827 DEFAULT(csiescseq.arg[0], 1);
1828 while(csiescseq.arg[0]--)
1829 tputtab(1);
1830 break;
1831 case 'J': /* ED -- Clear screen */
1832 sel.bx = -1;
1833 switch(csiescseq.arg[0]) {
1834 case 0: /* below */
1835 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1836 if(term.c.y < term.row-1) {
1837 tclearregion(0, term.c.y+1, term.col-1,
1838 term.row-1);
1839 }
1840 break;
1841 case 1: /* above */
1842 if(term.c.y > 1)
1843 tclearregion(0, 0, term.col-1, term.c.y-1);
1844 tclearregion(0, term.c.y, term.c.x, term.c.y);
1845 break;
1846 case 2: /* all */
1847 tclearregion(0, 0, term.col-1, term.row-1);
1848 break;
1849 default:
1850 goto unknown;
1851 }
1852 break;
1853 case 'K': /* EL -- Clear line */
1854 switch(csiescseq.arg[0]) {
1855 case 0: /* right */
1856 tclearregion(term.c.x, term.c.y, term.col-1,
1857 term.c.y);
1858 break;
1859 case 1: /* left */
1860 tclearregion(0, term.c.y, term.c.x, term.c.y);
1861 break;
1862 case 2: /* all */
1863 tclearregion(0, term.c.y, term.col-1, term.c.y);
1864 break;
1865 }
1866 break;
1867 case 'S': /* SU -- Scroll <n> line up */
1868 DEFAULT(csiescseq.arg[0], 1);
1869 tscrollup(term.top, csiescseq.arg[0]);
1870 break;
1871 case 'T': /* SD -- Scroll <n> line down */
1872 DEFAULT(csiescseq.arg[0], 1);
1873 tscrolldown(term.top, csiescseq.arg[0]);
1874 break;
1875 case 'L': /* IL -- Insert <n> blank lines */
1876 DEFAULT(csiescseq.arg[0], 1);
1877 tinsertblankline(csiescseq.arg[0]);
1878 break;
1879 case 'l': /* RM -- Reset Mode */
1880 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1881 break;
1882 case 'M': /* DL -- Delete <n> lines */
1883 DEFAULT(csiescseq.arg[0], 1);
1884 tdeleteline(csiescseq.arg[0]);
1885 break;
1886 case 'X': /* ECH -- Erase <n> char */
1887 DEFAULT(csiescseq.arg[0], 1);
1888 tclearregion(term.c.x, term.c.y,
1889 term.c.x + csiescseq.arg[0] - 1, term.c.y);
1890 break;
1891 case 'P': /* DCH -- Delete <n> char */
1892 DEFAULT(csiescseq.arg[0], 1);
1893 tdeletechar(csiescseq.arg[0]);
1894 break;
1895 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1896 DEFAULT(csiescseq.arg[0], 1);
1897 while(csiescseq.arg[0]--)
1898 tputtab(0);
1899 break;
1900 case 'd': /* VPA -- Move to <row> */
1901 DEFAULT(csiescseq.arg[0], 1);
1902 tmoveato(term.c.x, csiescseq.arg[0]-1);
1903 break;
1904 case 'h': /* SM -- Set terminal mode */
1905 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1906 break;
1907 case 'm': /* SGR -- Terminal attribute (color) */
1908 tsetattr(csiescseq.arg, csiescseq.narg);
1909 break;
1910 case 'r': /* DECSTBM -- Set Scrolling Region */
1911 if(csiescseq.priv) {
1912 goto unknown;
1913 } else {
1914 DEFAULT(csiescseq.arg[0], 1);
1915 DEFAULT(csiescseq.arg[1], term.row);
1916 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1917 tmoveato(0, 0);
1918 }
1919 break;
1920 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1921 tcursor(CURSOR_SAVE);
1922 break;
1923 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1924 tcursor(CURSOR_LOAD);
1925 break;
1926 }
1927 }
1928
1929 void
1930 csidump(void) {
1931 int i;
1932 uint c;
1933
1934 printf("ESC[");
1935 for(i = 0; i < csiescseq.len; i++) {
1936 c = csiescseq.buf[i] & 0xff;
1937 if(isprint(c)) {
1938 putchar(c);
1939 } else if(c == '\n') {
1940 printf("(\\n)");
1941 } else if(c == '\r') {
1942 printf("(\\r)");
1943 } else if(c == 0x1b) {
1944 printf("(\\e)");
1945 } else {
1946 printf("(%02x)", c);
1947 }
1948 }
1949 putchar('\n');
1950 }
1951
1952 void
1953 csireset(void) {
1954 memset(&csiescseq, 0, sizeof(csiescseq));
1955 }
1956
1957 void
1958 strhandle(void) {
1959 char *p = NULL;
1960 int i, j, narg;
1961
1962 strparse();
1963 narg = strescseq.narg;
1964
1965 switch(strescseq.type) {
1966 case ']': /* OSC -- Operating System Command */
1967 switch(i = atoi(strescseq.args[0])) {
1968 case 0:
1969 case 1:
1970 case 2:
1971 if(narg > 1)
1972 xsettitle(strescseq.args[1]);
1973 break;
1974 case 4: /* color set */
1975 if(narg < 3)
1976 break;
1977 p = strescseq.args[2];
1978 /* fall through */
1979 case 104: /* color reset, here p = NULL */
1980 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
1981 if (!xsetcolorname(j, p)) {
1982 fprintf(stderr, "erresc: invalid color %s\n", p);
1983 } else {
1984 /*
1985 * TODO if defaultbg color is changed, borders
1986 * are dirty
1987 */
1988 redraw(0);
1989 }
1990 break;
1991 default:
1992 fprintf(stderr, "erresc: unknown str ");
1993 strdump();
1994 break;
1995 }
1996 break;
1997 case 'k': /* old title set compatibility */
1998 xsettitle(strescseq.args[0]);
1999 break;
2000 case 'P': /* DSC -- Device Control String */
2001 case '_': /* APC -- Application Program Command */
2002 case '^': /* PM -- Privacy Message */
2003 default:
2004 fprintf(stderr, "erresc: unknown str ");
2005 strdump();
2006 /* die(""); */
2007 break;
2008 }
2009 }
2010
2011 void
2012 strparse(void) {
2013 char *p = strescseq.buf;
2014
2015 strescseq.narg = 0;
2016 strescseq.buf[strescseq.len] = '\0';
2017 while(p && strescseq.narg < STR_ARG_SIZ)
2018 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2019 }
2020
2021 void
2022 strdump(void) {
2023 int i;
2024 uint c;
2025
2026 printf("ESC%c", strescseq.type);
2027 for(i = 0; i < strescseq.len; i++) {
2028 c = strescseq.buf[i] & 0xff;
2029 if(c == '\0') {
2030 return;
2031 } else if(isprint(c)) {
2032 putchar(c);
2033 } else if(c == '\n') {
2034 printf("(\\n)");
2035 } else if(c == '\r') {
2036 printf("(\\r)");
2037 } else if(c == 0x1b) {
2038 printf("(\\e)");
2039 } else {
2040 printf("(%02x)", c);
2041 }
2042 }
2043 printf("ESC\\\n");
2044 }
2045
2046 void
2047 strreset(void) {
2048 memset(&strescseq, 0, sizeof(strescseq));
2049 }
2050
2051 void
2052 tputtab(bool forward) {
2053 uint x = term.c.x;
2054
2055 if(forward) {
2056 if(x == term.col)
2057 return;
2058 for(++x; x < term.col && !term.tabs[x]; ++x)
2059 /* nothing */ ;
2060 } else {
2061 if(x == 0)
2062 return;
2063 for(--x; x > 0 && !term.tabs[x]; --x)
2064 /* nothing */ ;
2065 }
2066 tmoveto(x, term.c.y);
2067 }
2068
2069 void
2070 techo(char *buf, int len) {
2071 for(; len > 0; buf++, len--) {
2072 char c = *buf;
2073
2074 if(c == '\033') { /* escape */
2075 tputc("^", 1);
2076 tputc("[", 1);
2077 } else if(c < '\x20') { /* control code */
2078 if(c != '\n' && c != '\r' && c != '\t') {
2079 c |= '\x40';
2080 tputc("^", 1);
2081 }
2082 tputc(&c, 1);
2083 } else {
2084 break;
2085 }
2086 }
2087 if(len)
2088 tputc(buf, len);
2089 }
2090
2091 void
2092 tputc(char *c, int len) {
2093 uchar ascii = *c;
2094 bool control = ascii < '\x20' || ascii == 0177;
2095
2096 if(iofd != -1) {
2097 if(xwrite(iofd, c, len) < 0) {
2098 fprintf(stderr, "Error writing in %s:%s\n",
2099 opt_io, strerror(errno));
2100 close(iofd);
2101 iofd = -1;
2102 }
2103 }
2104
2105 /*
2106 * STR sequences must be checked before anything else
2107 * because it can use some control codes as part of the sequence.
2108 */
2109 if(term.esc & ESC_STR) {
2110 switch(ascii) {
2111 case '\033':
2112 term.esc = ESC_START | ESC_STR_END;
2113 break;
2114 case '\a': /* backwards compatibility to xterm */
2115 term.esc = 0;
2116 strhandle();
2117 break;
2118 default:
2119 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2120 memmove(&strescseq.buf[strescseq.len], c, len);
2121 strescseq.len += len;
2122 } else {
2123 /*
2124 * Here is a bug in terminals. If the user never sends
2125 * some code to stop the str or esc command, then st
2126 * will stop responding. But this is better than
2127 * silently failing with unknown characters. At least
2128 * then users will report back.
2129 *
2130 * In the case users ever get fixed, here is the code:
2131 */
2132 /*
2133 * term.esc = 0;
2134 * strhandle();
2135 */
2136 }
2137 }
2138 return;
2139 }
2140
2141 /*
2142 * Actions of control codes must be performed as soon they arrive
2143 * because they can be embedded inside a control sequence, and
2144 * they must not cause conflicts with sequences.
2145 */
2146 if(control) {
2147 switch(ascii) {
2148 case '\t': /* HT */
2149 tputtab(1);
2150 return;
2151 case '\b': /* BS */
2152 tmoveto(term.c.x-1, term.c.y);
2153 return;
2154 case '\r': /* CR */
2155 tmoveto(0, term.c.y);
2156 return;
2157 case '\f': /* LF */
2158 case '\v': /* VT */
2159 case '\n': /* LF */
2160 /* go to first col if the mode is set */
2161 tnewline(IS_SET(MODE_CRLF));
2162 return;
2163 case '\a': /* BEL */
2164 if(!(xw.state & WIN_FOCUSED))
2165 xseturgency(1);
2166 return;
2167 case '\033': /* ESC */
2168 csireset();
2169 term.esc = ESC_START;
2170 return;
2171 case '\016': /* SO */
2172 case '\017': /* SI */
2173 /*
2174 * Different charsets are hard to handle. Applications
2175 * should use the right alt charset escapes for the
2176 * only reason they still exist: line drawing. The
2177 * rest is incompatible history st should not support.
2178 */
2179 return;
2180 case '\032': /* SUB */
2181 case '\030': /* CAN */
2182 csireset();
2183 return;
2184 case '\005': /* ENQ (IGNORED) */
2185 case '\000': /* NUL (IGNORED) */
2186 case '\021': /* XON (IGNORED) */
2187 case '\023': /* XOFF (IGNORED) */
2188 case 0177: /* DEL (IGNORED) */
2189 return;
2190 }
2191 } else if(term.esc & ESC_START) {
2192 if(term.esc & ESC_CSI) {
2193 csiescseq.buf[csiescseq.len++] = ascii;
2194 if(BETWEEN(ascii, 0x40, 0x7E)
2195 || csiescseq.len >= \
2196 sizeof(csiescseq.buf)-1) {
2197 term.esc = 0;
2198 csiparse();
2199 csihandle();
2200 }
2201 } else if(term.esc & ESC_STR_END) {
2202 term.esc = 0;
2203 if(ascii == '\\')
2204 strhandle();
2205 } else if(term.esc & ESC_ALTCHARSET) {
2206 switch(ascii) {
2207 case '0': /* Line drawing set */
2208 term.c.attr.mode |= ATTR_GFX;
2209 break;
2210 case 'B': /* USASCII */
2211 term.c.attr.mode &= ~ATTR_GFX;
2212 break;
2213 case 'A': /* UK (IGNORED) */
2214 case '<': /* multinational charset (IGNORED) */
2215 case '5': /* Finnish (IGNORED) */
2216 case 'C': /* Finnish (IGNORED) */
2217 case 'K': /* German (IGNORED) */
2218 break;
2219 default:
2220 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2221 }
2222 term.esc = 0;
2223 } else if(term.esc & ESC_TEST) {
2224 if(ascii == '8') { /* DEC screen alignment test. */
2225 char E[UTF_SIZ] = "E";
2226 int x, y;
2227
2228 for(x = 0; x < term.col; ++x) {
2229 for(y = 0; y < term.row; ++y)
2230 tsetchar(E, &term.c.attr, x, y);
2231 }
2232 }
2233 term.esc = 0;
2234 } else {
2235 switch(ascii) {
2236 case '[':
2237 term.esc |= ESC_CSI;
2238 break;
2239 case '#':
2240 term.esc |= ESC_TEST;
2241 break;
2242 case 'P': /* DCS -- Device Control String */
2243 case '_': /* APC -- Application Program Command */
2244 case '^': /* PM -- Privacy Message */
2245 case ']': /* OSC -- Operating System Command */
2246 case 'k': /* old title set compatibility */
2247 strreset();
2248 strescseq.type = ascii;
2249 term.esc |= ESC_STR;
2250 break;
2251 case '(': /* set primary charset G0 */
2252 term.esc |= ESC_ALTCHARSET;
2253 break;
2254 case ')': /* set secondary charset G1 (IGNORED) */
2255 case '*': /* set tertiary charset G2 (IGNORED) */
2256 case '+': /* set quaternary charset G3 (IGNORED) */
2257 term.esc = 0;
2258 break;
2259 case 'D': /* IND -- Linefeed */
2260 if(term.c.y == term.bot) {
2261 tscrollup(term.top, 1);
2262 } else {
2263 tmoveto(term.c.x, term.c.y+1);
2264 }
2265 term.esc = 0;
2266 break;
2267 case 'E': /* NEL -- Next line */
2268 tnewline(1); /* always go to first col */
2269 term.esc = 0;
2270 break;
2271 case 'H': /* HTS -- Horizontal tab stop */
2272 term.tabs[term.c.x] = 1;
2273 term.esc = 0;
2274 break;
2275 case 'M': /* RI -- Reverse index */
2276 if(term.c.y == term.top) {
2277 tscrolldown(term.top, 1);
2278 } else {
2279 tmoveto(term.c.x, term.c.y-1);
2280 }
2281 term.esc = 0;
2282 break;
2283 case 'Z': /* DECID -- Identify Terminal */
2284 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2285 term.esc = 0;
2286 break;
2287 case 'c': /* RIS -- Reset to inital state */
2288 treset();
2289 term.esc = 0;
2290 xresettitle();
2291 break;
2292 case '=': /* DECPAM -- Application keypad */
2293 term.mode |= MODE_APPKEYPAD;
2294 term.esc = 0;
2295 break;
2296 case '>': /* DECPNM -- Normal keypad */
2297 term.mode &= ~MODE_APPKEYPAD;
2298 term.esc = 0;
2299 break;
2300 case '7': /* DECSC -- Save Cursor */
2301 tcursor(CURSOR_SAVE);
2302 term.esc = 0;
2303 break;
2304 case '8': /* DECRC -- Restore Cursor */
2305 tcursor(CURSOR_LOAD);
2306 term.esc = 0;
2307 break;
2308 case '\\': /* ST -- Stop */
2309 term.esc = 0;
2310 break;
2311 default:
2312 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2313 (uchar) ascii, isprint(ascii)? ascii:'.');
2314 term.esc = 0;
2315 }
2316 }
2317 /*
2318 * All characters which form part of a sequence are not
2319 * printed
2320 */
2321 return;
2322 }
2323 /*
2324 * Display control codes only if we are in graphic mode
2325 */
2326 if(control && !(term.c.attr.mode & ATTR_GFX))
2327 return;
2328 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2329 sel.bx = -1;
2330 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2331 term.line[term.c.y][term.c.x].mode |= ATTR_WRAP;
2332 tnewline(1);
2333 }
2334
2335 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2336 memmove(&term.line[term.c.y][term.c.x+1],
2337 &term.line[term.c.y][term.c.x],
2338 (term.col - term.c.x - 1) * sizeof(Glyph));
2339 }
2340
2341 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2342 if(term.c.x+1 < term.col) {
2343 tmoveto(term.c.x+1, term.c.y);
2344 } else {
2345 term.c.state |= CURSOR_WRAPNEXT;
2346 }
2347 }
2348
2349 int
2350 tresize(int col, int row) {
2351 int i;
2352 int minrow = MIN(row, term.row);
2353 int mincol = MIN(col, term.col);
2354 int slide = term.c.y - row + 1;
2355 bool *bp;
2356 Line *orig;
2357
2358 if(col < 1 || row < 1)
2359 return 0;
2360
2361 /* free unneeded rows */
2362 i = 0;
2363 if(slide > 0) {
2364 /*
2365 * slide screen to keep cursor where we expect it -
2366 * tscrollup would work here, but we can optimize to
2367 * memmove because we're freeing the earlier lines
2368 */
2369 for(/* i = 0 */; i < slide; i++) {
2370 free(term.line[i]);
2371 free(term.alt[i]);
2372 }
2373 memmove(term.line, term.line + slide, row * sizeof(Line));
2374 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2375 }
2376 for(i += row; i < term.row; i++) {
2377 free(term.line[i]);
2378 free(term.alt[i]);
2379 }
2380
2381 /* resize to new height */
2382 term.line = xrealloc(term.line, row * sizeof(Line));
2383 term.alt = xrealloc(term.alt, row * sizeof(Line));
2384 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2385 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2386
2387 /* resize each row to new width, zero-pad if needed */
2388 for(i = 0; i < minrow; i++) {
2389 term.dirty[i] = 1;
2390 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2391 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2392 }
2393
2394 /* allocate any new rows */
2395 for(/* i == minrow */; i < row; i++) {
2396 term.dirty[i] = 1;
2397 term.line[i] = xcalloc(col, sizeof(Glyph));
2398 term.alt [i] = xcalloc(col, sizeof(Glyph));
2399 }
2400 if(col > term.col) {
2401 bp = term.tabs + term.col;
2402
2403 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2404 while(--bp > term.tabs && !*bp)
2405 /* nothing */ ;
2406 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2407 *bp = 1;
2408 }
2409 /* update terminal size */
2410 term.col = col;
2411 term.row = row;
2412 /* reset scrolling region */
2413 tsetscroll(0, row-1);
2414 /* make use of the LIMIT in tmoveto */
2415 tmoveto(term.c.x, term.c.y);
2416 /* Clearing both screens */
2417 orig = term.line;
2418 do {
2419 if(mincol < col && 0 < minrow) {
2420 tclearregion(mincol, 0, col - 1, minrow - 1);
2421 }
2422 if(0 < col && minrow < row) {
2423 tclearregion(0, minrow, col - 1, row - 1);
2424 }
2425 tswapscreen();
2426 } while(orig != term.line);
2427
2428 return (slide > 0);
2429 }
2430
2431 void
2432 xresize(int col, int row) {
2433 xw.tw = MAX(1, col * xw.cw);
2434 xw.th = MAX(1, row * xw.ch);
2435
2436 XFreePixmap(xw.dpy, xw.buf);
2437 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2438 DefaultDepth(xw.dpy, xw.scr));
2439 XftDrawChange(xw.draw, xw.buf);
2440 xclear(0, 0, xw.w, xw.h);
2441 }
2442
2443 static inline ushort
2444 sixd_to_16bit(int x) {
2445 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2446 }
2447
2448 void
2449 xloadcols(void) {
2450 int i, r, g, b;
2451 XRenderColor color = { .alpha = 0xffff };
2452
2453 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2454 for(i = 0; i < LEN(colorname); i++) {
2455 if(!colorname[i])
2456 continue;
2457 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2458 die("Could not allocate color '%s'\n", colorname[i]);
2459 }
2460 }
2461
2462 /* load colors [16-255] ; same colors as xterm */
2463 for(i = 16, r = 0; r < 6; r++) {
2464 for(g = 0; g < 6; g++) {
2465 for(b = 0; b < 6; b++) {
2466 color.red = sixd_to_16bit(r);
2467 color.green = sixd_to_16bit(g);
2468 color.blue = sixd_to_16bit(b);
2469 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2470 die("Could not allocate color %d\n", i);
2471 }
2472 i++;
2473 }
2474 }
2475 }
2476
2477 for(r = 0; r < 24; r++, i++) {
2478 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2479 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2480 &dc.col[i])) {
2481 die("Could not allocate color %d\n", i);
2482 }
2483 }
2484 }
2485
2486 int
2487 xsetcolorname(int x, const char *name) {
2488 XRenderColor color = { .alpha = 0xffff };
2489 Colour colour;
2490 if (x < 0 || x > LEN(colorname))
2491 return -1;
2492 if(!name) {
2493 if(16 <= x && x < 16 + 216) {
2494 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2495 color.red = sixd_to_16bit(r);
2496 color.green = sixd_to_16bit(g);
2497 color.blue = sixd_to_16bit(b);
2498 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2499 return 0; /* something went wrong */
2500 dc.col[x] = colour;
2501 return 1;
2502 } else if (16 + 216 <= x && x < 256) {
2503 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2504 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2505 return 0; /* something went wrong */
2506 dc.col[x] = colour;
2507 return 1;
2508 } else {
2509 name = colorname[x];
2510 }
2511 }
2512 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2513 return 0;
2514 dc.col[x] = colour;
2515 return 1;
2516 }
2517
2518 void
2519 xtermclear(int col1, int row1, int col2, int row2) {
2520 XftDrawRect(xw.draw,
2521 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2522 borderpx + col1 * xw.cw,
2523 borderpx + row1 * xw.ch,
2524 (col2-col1+1) * xw.cw,
2525 (row2-row1+1) * xw.ch);
2526 }
2527
2528 /*
2529 * Absolute coordinates.
2530 */
2531 void
2532 xclear(int x1, int y1, int x2, int y2) {
2533 XftDrawRect(xw.draw,
2534 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2535 x1, y1, x2-x1, y2-y1);
2536 }
2537
2538 void
2539 xhints(void) {
2540 XClassHint class = {opt_class ? opt_class : termname, termname};
2541 XWMHints wm = {.flags = InputHint, .input = 1};
2542 XSizeHints *sizeh = NULL;
2543
2544 sizeh = XAllocSizeHints();
2545 if(xw.isfixed == False) {
2546 sizeh->flags = PSize | PResizeInc | PBaseSize;
2547 sizeh->height = xw.h;
2548 sizeh->width = xw.w;
2549 sizeh->height_inc = xw.ch;
2550 sizeh->width_inc = xw.cw;
2551 sizeh->base_height = 2 * borderpx;
2552 sizeh->base_width = 2 * borderpx;
2553 } else {
2554 sizeh->flags = PMaxSize | PMinSize;
2555 sizeh->min_width = sizeh->max_width = xw.fw;
2556 sizeh->min_height = sizeh->max_height = xw.fh;
2557 }
2558
2559 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2560 XFree(sizeh);
2561 }
2562
2563 int
2564 xloadfont(Font *f, FcPattern *pattern) {
2565 FcPattern *match;
2566 FcResult result;
2567
2568 match = FcFontMatch(NULL, pattern, &result);
2569 if(!match)
2570 return 1;
2571
2572 if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
2573 FcPatternDestroy(match);
2574 return 1;
2575 }
2576
2577 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2578 FcPatternDestroy(match);
2579 return 1;
2580 }
2581
2582 f->pattern = FcPatternDuplicate(pattern);
2583
2584 f->ascent = f->match->ascent;
2585 f->descent = f->match->descent;
2586 f->lbearing = 0;
2587 f->rbearing = f->match->max_advance_width;
2588
2589 f->height = f->ascent + f->descent;
2590 f->width = f->lbearing + f->rbearing;
2591
2592 return 0;
2593 }
2594
2595 void
2596 xloadfonts(char *fontstr, int fontsize) {
2597 FcPattern *pattern;
2598 FcResult result;
2599 double fontval;
2600
2601 if(fontstr[0] == '-') {
2602 pattern = XftXlfdParse(fontstr, False, False);
2603 } else {
2604 pattern = FcNameParse((FcChar8 *)fontstr);
2605 }
2606
2607 if(!pattern)
2608 die("st: can't open font %s\n", fontstr);
2609
2610 if(fontsize > 0) {
2611 FcPatternDel(pattern, FC_PIXEL_SIZE);
2612 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2613 usedfontsize = fontsize;
2614 } else {
2615 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2616 if(result == FcResultMatch) {
2617 usedfontsize = (int)fontval;
2618 } else {
2619 /*
2620 * Default font size is 12, if none given. This is to
2621 * have a known usedfontsize value.
2622 */
2623 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2624 usedfontsize = 12;
2625 }
2626 }
2627
2628 FcConfigSubstitute(0, pattern, FcMatchPattern);
2629 FcDefaultSubstitute(pattern);
2630
2631 if(xloadfont(&dc.font, pattern))
2632 die("st: can't open font %s\n", fontstr);
2633
2634 /* Setting character width and height. */
2635 xw.cw = dc.font.width;
2636 xw.ch = dc.font.height;
2637
2638 FcPatternDel(pattern, FC_SLANT);
2639 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2640 if(xloadfont(&dc.ifont, pattern))
2641 die("st: can't open font %s\n", fontstr);
2642
2643 FcPatternDel(pattern, FC_WEIGHT);
2644 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2645 if(xloadfont(&dc.ibfont, pattern))
2646 die("st: can't open font %s\n", fontstr);
2647
2648 FcPatternDel(pattern, FC_SLANT);
2649 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2650 if(xloadfont(&dc.bfont, pattern))
2651 die("st: can't open font %s\n", fontstr);
2652
2653 FcPatternDestroy(pattern);
2654 }
2655
2656 void
2657 xunloadfonts(void) {
2658 int i, ip;
2659
2660 /*
2661 * Free the loaded fonts in the font cache. This is done backwards
2662 * from the frccur.
2663 */
2664 for(i = 0, ip = frccur; i < frclen; i++, ip--) {
2665 if(ip < 0)
2666 ip = LEN(frc) - 1;
2667 XftFontClose(xw.dpy, frc[ip].font);
2668 }
2669 frccur = -1;
2670 frclen = 0;
2671
2672 XftFontClose(xw.dpy, dc.font.match);
2673 FcPatternDestroy(dc.font.pattern);
2674 FcFontSetDestroy(dc.font.set);
2675 XftFontClose(xw.dpy, dc.bfont.match);
2676 FcPatternDestroy(dc.bfont.pattern);
2677 FcFontSetDestroy(dc.bfont.set);
2678 XftFontClose(xw.dpy, dc.ifont.match);
2679 FcPatternDestroy(dc.ifont.pattern);
2680 FcFontSetDestroy(dc.ifont.set);
2681 XftFontClose(xw.dpy, dc.ibfont.match);
2682 FcPatternDestroy(dc.ibfont.pattern);
2683 FcFontSetDestroy(dc.ibfont.set);
2684 }
2685
2686 void
2687 xzoom(const Arg *arg) {
2688 xunloadfonts();
2689 xloadfonts(usedfont, usedfontsize + arg->i);
2690 cresize(0, 0);
2691 redraw(0);
2692 }
2693
2694 void
2695 xinit(void) {
2696 XSetWindowAttributes attrs;
2697 XGCValues gcvalues;
2698 Cursor cursor;
2699 Window parent;
2700 int sw, sh;
2701
2702 if(!(xw.dpy = XOpenDisplay(NULL)))
2703 die("Can't open display\n");
2704 xw.scr = XDefaultScreen(xw.dpy);
2705 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2706
2707 /* font */
2708 if(!FcInit())
2709 die("Could not init fontconfig.\n");
2710
2711 usedfont = (opt_font == NULL)? font : opt_font;
2712 xloadfonts(usedfont, 0);
2713
2714 /* colors */
2715 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2716 xloadcols();
2717
2718 /* adjust fixed window geometry */
2719 if(xw.isfixed) {
2720 sw = DisplayWidth(xw.dpy, xw.scr);
2721 sh = DisplayHeight(xw.dpy, xw.scr);
2722 if(xw.fx < 0)
2723 xw.fx = sw + xw.fx - xw.fw - 1;
2724 if(xw.fy < 0)
2725 xw.fy = sh + xw.fy - xw.fh - 1;
2726
2727 xw.h = xw.fh;
2728 xw.w = xw.fw;
2729 } else {
2730 /* window - default size */
2731 xw.h = 2 * borderpx + term.row * xw.ch;
2732 xw.w = 2 * borderpx + term.col * xw.cw;
2733 xw.fx = 0;
2734 xw.fy = 0;
2735 }
2736
2737 /* Events */
2738 attrs.background_pixel = dc.col[defaultbg].pixel;
2739 attrs.border_pixel = dc.col[defaultbg].pixel;
2740 attrs.bit_gravity = NorthWestGravity;
2741 attrs.event_mask = FocusChangeMask | KeyPressMask
2742 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2743 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2744 attrs.colormap = xw.cmap;
2745
2746 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2747 XRootWindow(xw.dpy, xw.scr);
2748 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2749 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2750 xw.vis,
2751 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2752 | CWColormap,
2753 &attrs);
2754
2755 memset(&gcvalues, 0, sizeof(gcvalues));
2756 gcvalues.graphics_exposures = False;
2757 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2758 &gcvalues);
2759 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2760 DefaultDepth(xw.dpy, xw.scr));
2761 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2762 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2763
2764 /* Xft rendering context */
2765 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2766
2767 /* input methods */
2768 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2769 XSetLocaleModifiers("@im=local");
2770 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2771 XSetLocaleModifiers("@im=");
2772 if((xw.xim = XOpenIM(xw.dpy,
2773 NULL, NULL, NULL)) == NULL) {
2774 die("XOpenIM failed. Could not open input"
2775 " device.\n");
2776 }
2777 }
2778 }
2779 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2780 | XIMStatusNothing, XNClientWindow, xw.win,
2781 XNFocusWindow, xw.win, NULL);
2782 if(xw.xic == NULL)
2783 die("XCreateIC failed. Could not obtain input method.\n");
2784
2785 /* white cursor, black outline */
2786 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2787 XDefineCursor(xw.dpy, xw.win, cursor);
2788 XRecolorCursor(xw.dpy, cursor,
2789 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2790 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2791
2792 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2793 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2794 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2795
2796 xresettitle();
2797 XMapWindow(xw.dpy, xw.win);
2798 xhints();
2799 XSync(xw.dpy, 0);
2800 }
2801
2802 void
2803 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2804 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2805 width = charlen * xw.cw, xp, i;
2806 int frp, frcflags;
2807 int u8fl, u8fblen, u8cblen, doesexist;
2808 char *u8c, *u8fs;
2809 long u8char;
2810 Font *font = &dc.font;
2811 FcResult fcres;
2812 FcPattern *fcpattern, *fontpattern;
2813 FcFontSet *fcsets[] = { NULL };
2814 FcCharSet *fccharset;
2815 Colour *fg, *bg, *temp, revfg, revbg;
2816 XRenderColor colfg, colbg;
2817 Rectangle r;
2818
2819 frcflags = FRC_NORMAL;
2820
2821 if(base.mode & ATTR_ITALIC) {
2822 if(base.fg == defaultfg)
2823 base.fg = defaultitalic;
2824 font = &dc.ifont;
2825 frcflags = FRC_ITALIC;
2826 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2827 if(base.fg == defaultfg)
2828 base.fg = defaultitalic;
2829 font = &dc.ibfont;
2830 frcflags = FRC_ITALICBOLD;
2831 } else if(base.mode & ATTR_UNDERLINE) {
2832 if(base.fg == defaultfg)
2833 base.fg = defaultunderline;
2834 }
2835 fg = &dc.col[base.fg];
2836 bg = &dc.col[base.bg];
2837
2838 if(base.mode & ATTR_BOLD) {
2839 if(BETWEEN(base.fg, 0, 7)) {
2840 /* basic system colors */
2841 fg = &dc.col[base.fg + 8];
2842 } else if(BETWEEN(base.fg, 16, 195)) {
2843 /* 256 colors */
2844 fg = &dc.col[base.fg + 36];
2845 } else if(BETWEEN(base.fg, 232, 251)) {
2846 /* greyscale */
2847 fg = &dc.col[base.fg + 4];
2848 }
2849 /*
2850 * Those ranges will not be brightened:
2851 * 8 - 15 – bright system colors
2852 * 196 - 231 – highest 256 color cube
2853 * 252 - 255 – brightest colors in greyscale
2854 */
2855 font = &dc.bfont;
2856 frcflags = FRC_BOLD;
2857 }
2858
2859 if(IS_SET(MODE_REVERSE)) {
2860 if(fg == &dc.col[defaultfg]) {
2861 fg = &dc.col[defaultbg];
2862 } else {
2863 colfg.red = ~fg->color.red;
2864 colfg.green = ~fg->color.green;
2865 colfg.blue = ~fg->color.blue;
2866 colfg.alpha = fg->color.alpha;
2867 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2868 fg = &revfg;
2869 }
2870
2871 if(bg == &dc.col[defaultbg]) {
2872 bg = &dc.col[defaultfg];
2873 } else {
2874 colbg.red = ~bg->color.red;
2875 colbg.green = ~bg->color.green;
2876 colbg.blue = ~bg->color.blue;
2877 colbg.alpha = bg->color.alpha;
2878 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2879 bg = &revbg;
2880 }
2881 }
2882
2883 if(base.mode & ATTR_REVERSE) {
2884 temp = fg;
2885 fg = bg;
2886 bg = temp;
2887 }
2888
2889 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
2890 fg = bg;
2891
2892 /* Intelligent cleaning up of the borders. */
2893 if(x == 0) {
2894 xclear(0, (y == 0)? 0 : winy, borderpx,
2895 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2896 }
2897 if(x + charlen >= term.col) {
2898 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2899 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2900 }
2901 if(y == 0)
2902 xclear(winx, 0, winx + width, borderpx);
2903 if(y == term.row-1)
2904 xclear(winx, winy + xw.ch, winx + width, xw.h);
2905
2906 /* Clean up the region we want to draw to. */
2907 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2908
2909 /* Set the clip region because Xft is sometimes dirty. */
2910 r.x = 0;
2911 r.y = 0;
2912 r.height = xw.ch;
2913 r.width = width;
2914 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
2915
2916 fcsets[0] = font->set;
2917 for(xp = winx; bytelen > 0;) {
2918 /*
2919 * Search for the range in the to be printed string of glyphs
2920 * that are in the main font. Then print that range. If
2921 * some glyph is found that is not in the font, do the
2922 * fallback dance.
2923 */
2924 u8fs = s;
2925 u8fblen = 0;
2926 u8fl = 0;
2927 for(;;) {
2928 u8c = s;
2929 u8cblen = utf8decode(s, &u8char);
2930 s += u8cblen;
2931 bytelen -= u8cblen;
2932
2933 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
2934 if(!doesexist || bytelen <= 0) {
2935 if(bytelen <= 0) {
2936 if(doesexist) {
2937 u8fl++;
2938 u8fblen += u8cblen;
2939 }
2940 }
2941
2942 if(u8fl > 0) {
2943 XftDrawStringUtf8(xw.draw, fg,
2944 font->match, xp,
2945 winy + font->ascent,
2946 (FcChar8 *)u8fs,
2947 u8fblen);
2948 xp += font->width * u8fl;
2949
2950 }
2951 break;
2952 }
2953
2954 u8fl++;
2955 u8fblen += u8cblen;
2956 }
2957 if(doesexist)
2958 break;
2959
2960 frp = frccur;
2961 /* Search the font cache. */
2962 for(i = 0; i < frclen; i++, frp--) {
2963 if(frp <= 0)
2964 frp = LEN(frc) - 1;
2965
2966 if(frc[frp].c == u8char
2967 && frc[frp].flags == frcflags) {
2968 break;
2969 }
2970 }
2971
2972 /* Nothing was found. */
2973 if(i >= frclen) {
2974 /*
2975 * Nothing was found in the cache. Now use
2976 * some dozen of Fontconfig calls to get the
2977 * font for one single character.
2978 */
2979 fcpattern = FcPatternDuplicate(font->pattern);
2980 fccharset = FcCharSetCreate();
2981
2982 FcCharSetAddChar(fccharset, u8char);
2983 FcPatternAddCharSet(fcpattern, FC_CHARSET,
2984 fccharset);
2985 FcPatternAddBool(fcpattern, FC_SCALABLE,
2986 FcTrue);
2987
2988 FcConfigSubstitute(0, fcpattern,
2989 FcMatchPattern);
2990 FcDefaultSubstitute(fcpattern);
2991
2992 fontpattern = FcFontSetMatch(0, fcsets,
2993 FcTrue, fcpattern, &fcres);
2994
2995 /*
2996 * Overwrite or create the new cache entry.
2997 */
2998 frccur++;
2999 frclen++;
3000 if(frccur >= LEN(frc))
3001 frccur = 0;
3002 if(frclen > LEN(frc)) {
3003 frclen = LEN(frc);
3004 XftFontClose(xw.dpy, frc[frccur].font);
3005 }
3006
3007 frc[frccur].font = XftFontOpenPattern(xw.dpy,
3008 fontpattern);
3009 frc[frccur].c = u8char;
3010 frc[frccur].flags = frcflags;
3011
3012 FcPatternDestroy(fcpattern);
3013 FcCharSetDestroy(fccharset);
3014
3015 frp = frccur;
3016 }
3017
3018 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
3019 xp, winy + frc[frp].font->ascent,
3020 (FcChar8 *)u8c, u8cblen);
3021
3022 xp += font->width;
3023 }
3024
3025 /*
3026 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3027 winy + font->ascent, (FcChar8 *)s, bytelen);
3028 */
3029
3030 if(base.mode & ATTR_UNDERLINE) {
3031 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3032 width, 1);
3033 }
3034
3035 /* Reset clip to none. */
3036 XftDrawSetClip(xw.draw, 0);
3037 }
3038
3039 void
3040 xdrawcursor(void) {
3041 static int oldx = 0, oldy = 0;
3042 int sl;
3043 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3044
3045 LIMIT(oldx, 0, term.col-1);
3046 LIMIT(oldy, 0, term.row-1);
3047
3048 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3049
3050 /* remove the old cursor */
3051 sl = utf8size(term.line[oldy][oldx].c);
3052 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3053 oldy, 1, sl);
3054
3055 /* draw the new one */
3056 if(!(IS_SET(MODE_HIDE))) {
3057 if(xw.state & WIN_FOCUSED) {
3058 if(IS_SET(MODE_REVERSE)) {
3059 g.mode |= ATTR_REVERSE;
3060 g.fg = defaultcs;
3061 g.bg = defaultfg;
3062 }
3063
3064 sl = utf8size(g.c);
3065 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
3066 } else {
3067 XftDrawRect(xw.draw, &dc.col[defaultcs],
3068 borderpx + term.c.x * xw.cw,
3069 borderpx + term.c.y * xw.ch,
3070 xw.cw - 1, 1);
3071 XftDrawRect(xw.draw, &dc.col[defaultcs],
3072 borderpx + term.c.x * xw.cw,
3073 borderpx + term.c.y * xw.ch,
3074 1, xw.ch - 1);
3075 XftDrawRect(xw.draw, &dc.col[defaultcs],
3076 borderpx + (term.c.x + 1) * xw.cw - 1,
3077 borderpx + term.c.y * xw.ch,
3078 1, xw.ch - 1);
3079 XftDrawRect(xw.draw, &dc.col[defaultcs],
3080 borderpx + term.c.x * xw.cw,
3081 borderpx + (term.c.y + 1) * xw.ch - 1,
3082 xw.cw, 1);
3083 }
3084 oldx = term.c.x, oldy = term.c.y;
3085 }
3086 }
3087
3088
3089 void
3090 xsettitle(char *p) {
3091 XTextProperty prop;
3092
3093 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3094 &prop);
3095 XSetWMName(xw.dpy, xw.win, &prop);
3096 }
3097
3098 void
3099 xresettitle(void) {
3100 xsettitle(opt_title ? opt_title : "st");
3101 }
3102
3103 void
3104 redraw(int timeout) {
3105 struct timespec tv = {0, timeout * 1000};
3106
3107 tfulldirt();
3108 draw();
3109
3110 if(timeout > 0) {
3111 nanosleep(&tv, NULL);
3112 XSync(xw.dpy, False); /* necessary for a good tput flash */
3113 }
3114 }
3115
3116 void
3117 draw(void) {
3118 drawregion(0, 0, term.col, term.row);
3119 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3120 xw.h, 0, 0);
3121 XSetForeground(xw.dpy, dc.gc,
3122 dc.col[IS_SET(MODE_REVERSE)?
3123 defaultfg : defaultbg].pixel);
3124 }
3125
3126 void
3127 drawregion(int x1, int y1, int x2, int y2) {
3128 int ic, ib, x, y, ox, sl;
3129 Glyph base, new;
3130 char buf[DRAW_BUF_SIZ];
3131 bool ena_sel = sel.bx != -1;
3132
3133 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3134 ena_sel = 0;
3135
3136 if(!(xw.state & WIN_VISIBLE))
3137 return;
3138
3139 for(y = y1; y < y2; y++) {
3140 if(!term.dirty[y])
3141 continue;
3142
3143 xtermclear(0, y, term.col, y);
3144 term.dirty[y] = 0;
3145 base = term.line[y][0];
3146 ic = ib = ox = 0;
3147 for(x = x1; x < x2; x++) {
3148 new = term.line[y][x];
3149 if(ena_sel && selected(x, y))
3150 new.mode ^= ATTR_REVERSE;
3151 if(ib > 0 && (ATTRCMP(base, new)
3152 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3153 xdraws(buf, base, ox, y, ic, ib);
3154 ic = ib = 0;
3155 }
3156 if(ib == 0) {
3157 ox = x;
3158 base = new;
3159 }
3160
3161 sl = utf8size(new.c);
3162 memcpy(buf+ib, new.c, sl);
3163 ib += sl;
3164 ++ic;
3165 }
3166 if(ib > 0)
3167 xdraws(buf, base, ox, y, ic, ib);
3168 }
3169 xdrawcursor();
3170 }
3171
3172 void
3173 expose(XEvent *ev) {
3174 XExposeEvent *e = &ev->xexpose;
3175
3176 if(xw.state & WIN_REDRAW) {
3177 if(!e->count)
3178 xw.state &= ~WIN_REDRAW;
3179 }
3180 redraw(0);
3181 }
3182
3183 void
3184 visibility(XEvent *ev) {
3185 XVisibilityEvent *e = &ev->xvisibility;
3186
3187 if(e->state == VisibilityFullyObscured) {
3188 xw.state &= ~WIN_VISIBLE;
3189 } else if(!(xw.state & WIN_VISIBLE)) {
3190 /* need a full redraw for next Expose, not just a buf copy */
3191 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3192 }
3193 }
3194
3195 void
3196 unmap(XEvent *ev) {
3197 xw.state &= ~WIN_VISIBLE;
3198 }
3199
3200 void
3201 xseturgency(int add) {
3202 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3203
3204 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3205 XSetWMHints(xw.dpy, xw.win, h);
3206 XFree(h);
3207 }
3208
3209 void
3210 focus(XEvent *ev) {
3211 XFocusChangeEvent *e = &ev->xfocus;
3212
3213 if(e->mode == NotifyGrab)
3214 return;
3215
3216 if(ev->type == FocusIn) {
3217 XSetICFocus(xw.xic);
3218 xw.state |= WIN_FOCUSED;
3219 xseturgency(0);
3220 } else {
3221 XUnsetICFocus(xw.xic);
3222 xw.state &= ~WIN_FOCUSED;
3223 }
3224 }
3225
3226 inline bool
3227 match(uint mask, uint state) {
3228 state &= ~(ignoremod);
3229
3230 if(mask == XK_NO_MOD && state)
3231 return false;
3232 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3233 return false;
3234 if((state & mask) != state)
3235 return false;
3236 return true;
3237 }
3238
3239 void
3240 numlock(const Arg *dummy) {
3241 term.numlock ^= 1;
3242 }
3243
3244 char*
3245 kmap(KeySym k, uint state) {
3246 uint mask;
3247 Key *kp;
3248 int i;
3249
3250 /* Check for mapped keys out of X11 function keys. */
3251 for(i = 0; i < LEN(mappedkeys); i++) {
3252 if(mappedkeys[i] == k)
3253 break;
3254 }
3255 if(i == LEN(mappedkeys)) {
3256 if((k & 0xFFFF) < 0xFD00)
3257 return NULL;
3258 }
3259
3260 for(kp = key; kp < key + LEN(key); kp++) {
3261 mask = kp->mask;
3262
3263 if(kp->k != k)
3264 continue;
3265
3266 if(!match(mask, state))
3267 continue;
3268
3269 if(kp->appkey > 0) {
3270 if(!IS_SET(MODE_APPKEYPAD))
3271 continue;
3272 if(term.numlock && kp->appkey == 2)
3273 continue;
3274 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3275 continue;
3276 }
3277
3278 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3279 (kp->appcursor > 0
3280 && !IS_SET(MODE_APPCURSOR))) {
3281 continue;
3282 }
3283
3284 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3285 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3286 continue;
3287 }
3288
3289 return kp->s;
3290 }
3291
3292 return NULL;
3293 }
3294
3295 void
3296 kpress(XEvent *ev) {
3297 XKeyEvent *e = &ev->xkey;
3298 KeySym ksym;
3299 char xstr[31], buf[32], *customkey, *cp = buf;
3300 int len, ret;
3301 long c;
3302 Status status;
3303 Shortcut *bp;
3304
3305 if(IS_SET(MODE_KBDLOCK))
3306 return;
3307
3308 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3309 e->state &= ~Mod2Mask;
3310 /* 1. shortcuts */
3311 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3312 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3313 bp->func(&(bp->arg));
3314 return;
3315 }
3316 }
3317
3318 /* 2. custom keys from config.h */
3319 if((customkey = kmap(ksym, e->state))) {
3320 len = strlen(customkey);
3321 memcpy(buf, customkey, len);
3322 /* 3. hardcoded (overrides X lookup) */
3323 } else {
3324 if(len == 0)
3325 return;
3326
3327 if(len == 1 && e->state & Mod1Mask) {
3328 if(IS_SET(MODE_8BIT)) {
3329 if(*xstr < 0177) {
3330 c = *xstr | B7;
3331 ret = utf8encode(&c, cp);
3332 cp += ret;
3333 len = 0;
3334 }
3335 } else {
3336 *cp++ = '\033';
3337 }
3338 }
3339
3340 memcpy(cp, xstr, len);
3341 len = cp - buf + len;
3342 }
3343
3344 ttywrite(buf, len);
3345 if(IS_SET(MODE_ECHO))
3346 techo(buf, len);
3347 }
3348
3349
3350 void
3351 cmessage(XEvent *e) {
3352 /*
3353 * See xembed specs
3354 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3355 */
3356 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3357 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3358 xw.state |= WIN_FOCUSED;
3359 xseturgency(0);
3360 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3361 xw.state &= ~WIN_FOCUSED;
3362 }
3363 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3364 /* Send SIGHUP to shell */
3365 kill(pid, SIGHUP);
3366 exit(EXIT_SUCCESS);
3367 }
3368 }
3369
3370 void
3371 cresize(int width, int height) {
3372 int col, row;
3373
3374 if(width != 0)
3375 xw.w = width;
3376 if(height != 0)
3377 xw.h = height;
3378
3379 col = (xw.w - 2 * borderpx) / xw.cw;
3380 row = (xw.h - 2 * borderpx) / xw.ch;
3381
3382 tresize(col, row);
3383 xresize(col, row);
3384 ttyresize();
3385 }
3386
3387 void
3388 resize(XEvent *e) {
3389 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3390 return;
3391
3392 cresize(e->xconfigure.width, e->xconfigure.height);
3393 }
3394
3395 void
3396 run(void) {
3397 XEvent ev;
3398 fd_set rfd;
3399 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3400 struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
3401
3402 gettimeofday(&lastblink, NULL);
3403 gettimeofday(&last, NULL);
3404
3405 for(xev = actionfps;;) {
3406 FD_ZERO(&rfd);
3407 FD_SET(cmdfd, &rfd);
3408 FD_SET(xfd, &rfd);
3409
3410 switch(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3411 case -1:
3412 if(errno == EINTR)
3413 continue;
3414 die("select failed: %s\n", SERRNO);
3415 default:
3416 if(FD_ISSET(cmdfd, &rfd)) {
3417 ttyread();
3418 if(blinktimeout) {
3419 blinkset = tattrset(ATTR_BLINK);
3420 if(!blinkset && term.mode & ATTR_BLINK)
3421 term.mode &= ~(MODE_BLINK);
3422 }
3423 }
3424
3425 if(FD_ISSET(xfd, &rfd))
3426 xev = actionfps;
3427 break;
3428 }
3429 gettimeofday(&now, NULL);
3430 drawtimeout.tv_sec = 0;
3431 drawtimeout.tv_usec = (1000/xfps) * 1000;
3432 tv = &drawtimeout;
3433
3434 dodraw = 0;
3435 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3436 tsetdirtattr(ATTR_BLINK);
3437 term.mode ^= MODE_BLINK;
3438 gettimeofday(&lastblink, NULL);
3439 dodraw = 1;
3440 }
3441 if(TIMEDIFF(now, last) \
3442 > (xev? (1000/xfps) : (1000/actionfps))) {
3443 dodraw = 1;
3444 last = now;
3445 }
3446
3447 if(dodraw) {
3448 while(XPending(xw.dpy)) {
3449 XNextEvent(xw.dpy, &ev);
3450 if(XFilterEvent(&ev, None))
3451 continue;
3452 if(handler[ev.type])
3453 (handler[ev.type])(&ev);
3454 }
3455
3456 draw();
3457 XFlush(xw.dpy);
3458
3459 if(xev && !FD_ISSET(xfd, &rfd))
3460 xev--;
3461 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3462 if(blinkset) {
3463 drawtimeout.tv_usec = 1000 * \
3464 blinktimeout;
3465 } else {
3466 tv = NULL;
3467 }
3468 }
3469 }
3470 }
3471 }
3472
3473 void
3474 usage(void) {
3475 die("%s " VERSION " (c) 2010-2013 st engineers\n" \
3476 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3477 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3478 }
3479
3480 int
3481 main(int argc, char *argv[]) {
3482 int bitm, xr, yr;
3483 uint wr, hr;
3484
3485 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3486 xw.isfixed = False;
3487
3488 ARGBEGIN {
3489 case 'a':
3490 allowaltscreen = false;
3491 break;
3492 case 'c':
3493 opt_class = EARGF(usage());
3494 break;
3495 case 'e':
3496 /* eat all remaining arguments */
3497 if(argc > 1)
3498 opt_cmd = &argv[1];
3499 goto run;
3500 case 'f':
3501 opt_font = EARGF(usage());
3502 break;
3503 case 'g':
3504 bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
3505 if(bitm & XValue)
3506 xw.fx = xr;
3507 if(bitm & YValue)
3508 xw.fy = yr;
3509 if(bitm & WidthValue)
3510 xw.fw = (int)wr;
3511 if(bitm & HeightValue)
3512 xw.fh = (int)hr;
3513 if(bitm & XNegative && xw.fx == 0)
3514 xw.fx = -1;
3515 if(bitm & XNegative && xw.fy == 0)
3516 xw.fy = -1;
3517
3518 if(xw.fh != 0 && xw.fw != 0)
3519 xw.isfixed = True;
3520 break;
3521 case 'o':
3522 opt_io = EARGF(usage());
3523 break;
3524 case 't':
3525 opt_title = EARGF(usage());
3526 break;
3527 case 'w':
3528 opt_embed = EARGF(usage());
3529 break;
3530 case 'v':
3531 default:
3532 usage();
3533 } ARGEND;
3534
3535 run:
3536 setlocale(LC_CTYPE, "");
3537 XSetLocaleModifiers("");
3538 tnew(80, 24);
3539 xinit();
3540 ttynew();
3541 selinit();
3542 if(xw.isfixed)
3543 cresize(xw.h, xw.w);
3544 run();
3545
3546 return 0;
3547 }
3548