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Implementing 8 bit mode for meta.
[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
40 #if defined(__linux)
41 #include <pty.h>
42 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
43 #include <util.h>
44 #elif defined(__FreeBSD__) || defined(__DragonFly__)
45 #include <libutil.h>
46 #endif
47
48
49 /* XEMBED messages */
50 #define XEMBED_FOCUS_IN 4
51 #define XEMBED_FOCUS_OUT 5
52
53 /* Arbitrary sizes */
54 #define UTF_SIZ 4
55 #define ESC_BUF_SIZ (128*UTF_SIZ)
56 #define ESC_ARG_SIZ 16
57 #define STR_BUF_SIZ ESC_BUF_SIZ
58 #define STR_ARG_SIZ ESC_ARG_SIZ
59 #define DRAW_BUF_SIZ 20*1024
60 #define XK_ANY_MOD UINT_MAX
61 #define XK_NO_MOD 0
62 #define XK_SWITCH_MOD (1<<13)
63
64 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
65
66 /* macros */
67 #define SERRNO strerror(errno)
68 #define MIN(a, b) ((a) < (b) ? (a) : (b))
69 #define MAX(a, b) ((a) < (b) ? (b) : (a))
70 #define LEN(a) (sizeof(a) / sizeof(a[0]))
71 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
72 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
73 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
74 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
75 #define IS_SET(flag) ((term.mode & (flag)) != 0)
76 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
77
78 #define VT102ID "\033[?6c"
79
80 enum glyph_attribute {
81 ATTR_NULL = 0,
82 ATTR_REVERSE = 1,
83 ATTR_UNDERLINE = 2,
84 ATTR_BOLD = 4,
85 ATTR_GFX = 8,
86 ATTR_ITALIC = 16,
87 ATTR_BLINK = 32,
88 ATTR_WRAP = 64,
89 };
90
91 enum cursor_movement {
92 CURSOR_SAVE,
93 CURSOR_LOAD
94 };
95
96 enum cursor_state {
97 CURSOR_DEFAULT = 0,
98 CURSOR_WRAPNEXT = 1,
99 CURSOR_ORIGIN = 2
100 };
101
102 enum term_mode {
103 MODE_WRAP = 1,
104 MODE_INSERT = 2,
105 MODE_APPKEYPAD = 4,
106 MODE_ALTSCREEN = 8,
107 MODE_CRLF = 16,
108 MODE_MOUSEBTN = 32,
109 MODE_MOUSEMOTION = 64,
110 MODE_MOUSE = 32|64,
111 MODE_REVERSE = 128,
112 MODE_KBDLOCK = 256,
113 MODE_HIDE = 512,
114 MODE_ECHO = 1024,
115 MODE_APPCURSOR = 2048,
116 MODE_MOUSESGR = 4096,
117 MODE_8BIT = 8192,
118 };
119
120 enum escape_state {
121 ESC_START = 1,
122 ESC_CSI = 2,
123 ESC_STR = 4, /* DSC, OSC, PM, APC */
124 ESC_ALTCHARSET = 8,
125 ESC_STR_END = 16, /* a final string was encountered */
126 ESC_TEST = 32, /* Enter in test mode */
127 };
128
129 enum window_state {
130 WIN_VISIBLE = 1,
131 WIN_REDRAW = 2,
132 WIN_FOCUSED = 4
133 };
134
135 enum selection_type {
136 SEL_REGULAR = 1,
137 SEL_RECTANGULAR = 2
138 };
139
140 enum selection_snap {
141 SNAP_WORD = 1,
142 SNAP_LINE = 2
143 };
144
145 /* bit macro */
146 #undef B0
147 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
148
149 typedef unsigned char uchar;
150 typedef unsigned int uint;
151 typedef unsigned long ulong;
152 typedef unsigned short ushort;
153
154 typedef struct {
155 char c[UTF_SIZ]; /* character code */
156 uchar mode; /* attribute flags */
157 ushort fg; /* foreground */
158 ushort bg; /* background */
159 } Glyph;
160
161 typedef Glyph *Line;
162
163 typedef struct {
164 Glyph attr; /* current char attributes */
165 int x;
166 int y;
167 char state;
168 } TCursor;
169
170 /* CSI Escape sequence structs */
171 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
172 typedef struct {
173 char buf[ESC_BUF_SIZ]; /* raw string */
174 int len; /* raw string length */
175 char priv;
176 int arg[ESC_ARG_SIZ];
177 int narg; /* nb of args */
178 char mode;
179 } CSIEscape;
180
181 /* STR Escape sequence structs */
182 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
183 typedef struct {
184 char type; /* ESC type ... */
185 char buf[STR_BUF_SIZ]; /* raw string */
186 int len; /* raw string length */
187 char *args[STR_ARG_SIZ];
188 int narg; /* nb of args */
189 } STREscape;
190
191 /* Internal representation of the screen */
192 typedef struct {
193 int row; /* nb row */
194 int col; /* nb col */
195 Line *line; /* screen */
196 Line *alt; /* alternate screen */
197 bool *dirty; /* dirtyness of lines */
198 TCursor c; /* cursor */
199 int top; /* top scroll limit */
200 int bot; /* bottom scroll limit */
201 int mode; /* terminal mode flags */
202 int esc; /* escape state flags */
203 bool numlock; /* lock numbers in keyboard */
204 bool *tabs;
205 } Term;
206
207 /* Purely graphic info */
208 typedef struct {
209 Display *dpy;
210 Colourmap cmap;
211 Window win;
212 Drawable buf;
213 Atom xembed, wmdeletewin;
214 XIM xim;
215 XIC xic;
216 Draw draw;
217 Visual *vis;
218 int scr;
219 bool isfixed; /* is fixed geometry? */
220 int fx, fy, fw, fh; /* fixed geometry */
221 int tw, th; /* tty width and height */
222 int w, h; /* window width and height */
223 int ch; /* char height */
224 int cw; /* char width */
225 char state; /* focus, redraw, visible */
226 } XWindow;
227
228 typedef struct {
229 KeySym k;
230 uint mask;
231 char s[ESC_BUF_SIZ];
232 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
233 signed char appkey; /* application keypad */
234 signed char appcursor; /* application cursor */
235 signed char crlf; /* crlf mode */
236 } Key;
237
238 /* TODO: use better name for vars... */
239 typedef struct {
240 int mode;
241 int type;
242 int snap;
243 int bx, by;
244 int ex, ey;
245 struct {
246 int x, y;
247 } b, e;
248 char *clip;
249 Atom xtarget;
250 bool alt;
251 struct timeval tclick1;
252 struct timeval tclick2;
253 } Selection;
254
255 typedef union {
256 int i;
257 unsigned int ui;
258 float f;
259 const void *v;
260 } Arg;
261
262 typedef struct {
263 unsigned int mod;
264 KeySym keysym;
265 void (*func)(const Arg *);
266 const Arg arg;
267 } Shortcut;
268
269 /* function definitions used in config.h */
270 static void clippaste(const Arg *);
271 static void numlock(const Arg *);
272 static void selpaste(const Arg *);
273 static void xzoom(const Arg *);
274
275 /* Config.h for applying patches and the configuration. */
276 #include "config.h"
277
278 /* Font structure */
279 typedef struct {
280 int height;
281 int width;
282 int ascent;
283 int descent;
284 short lbearing;
285 short rbearing;
286 XftFont *match;
287 FcFontSet *set;
288 FcPattern *pattern;
289 } Font;
290
291 /* Drawing Context */
292 typedef struct {
293 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
294 Font font, bfont, ifont, ibfont;
295 GC gc;
296 } DC;
297
298 static void die(const char *, ...);
299 static void draw(void);
300 static void redraw(int);
301 static void drawregion(int, int, int, int);
302 static void execsh(void);
303 static void sigchld(int);
304 static void run(void);
305
306 static void csidump(void);
307 static void csihandle(void);
308 static void csiparse(void);
309 static void csireset(void);
310 static void strdump(void);
311 static void strhandle(void);
312 static void strparse(void);
313 static void strreset(void);
314
315 static void tclearregion(int, int, int, int);
316 static void tcursor(int);
317 static void tdeletechar(int);
318 static void tdeleteline(int);
319 static void tinsertblank(int);
320 static void tinsertblankline(int);
321 static void tmoveto(int, int);
322 static void tmoveato(int x, int y);
323 static void tnew(int, int);
324 static void tnewline(int);
325 static void tputtab(bool);
326 static void tputc(char *, int);
327 static void treset(void);
328 static int tresize(int, int);
329 static void tscrollup(int, int);
330 static void tscrolldown(int, int);
331 static void tsetattr(int*, int);
332 static void tsetchar(char *, Glyph *, int, int);
333 static void tsetscroll(int, int);
334 static void tswapscreen(void);
335 static void tsetdirt(int, int);
336 static void tsetmode(bool, bool, int *, int);
337 static void tfulldirt(void);
338 static void techo(char *, int);
339
340 static inline bool match(uint, uint);
341 static void ttynew(void);
342 static void ttyread(void);
343 static void ttyresize(void);
344 static void ttywrite(const char *, size_t);
345
346 static void xdraws(char *, Glyph, int, int, int, int);
347 static void xhints(void);
348 static void xclear(int, int, int, int);
349 static void xdrawcursor(void);
350 static void xinit(void);
351 static void xloadcols(void);
352 static int xsetcolorname(int, const char *);
353 static int xloadfont(Font *, FcPattern *);
354 static void xloadfonts(char *, int);
355 static void xsettitle(char *);
356 static void xresettitle(void);
357 static void xseturgency(int);
358 static void xsetsel(char*);
359 static void xtermclear(int, int, int, int);
360 static void xunloadfonts(void);
361 static void xresize(int, int);
362
363 static void expose(XEvent *);
364 static void visibility(XEvent *);
365 static void unmap(XEvent *);
366 static char *kmap(KeySym, uint);
367 static void kpress(XEvent *);
368 static void cmessage(XEvent *);
369 static void cresize(int, int);
370 static void resize(XEvent *);
371 static void focus(XEvent *);
372 static void brelease(XEvent *);
373 static void bpress(XEvent *);
374 static void bmotion(XEvent *);
375 static void selnotify(XEvent *);
376 static void selclear(XEvent *);
377 static void selrequest(XEvent *);
378
379 static void selinit(void);
380 static inline bool selected(int, int);
381 static void selcopy(void);
382 static void selscroll(int, int);
383 static void selsnap(int, int *, int *, int);
384
385 static int utf8decode(char *, long *);
386 static int utf8encode(long *, char *);
387 static int utf8size(char *);
388 static int isfullutf8(char *, int);
389
390 static ssize_t xwrite(int, char *, size_t);
391 static void *xmalloc(size_t);
392 static void *xrealloc(void *, size_t);
393 static void *xcalloc(size_t, size_t);
394
395 static void (*handler[LASTEvent])(XEvent *) = {
396 [KeyPress] = kpress,
397 [ClientMessage] = cmessage,
398 [ConfigureNotify] = resize,
399 [VisibilityNotify] = visibility,
400 [UnmapNotify] = unmap,
401 [Expose] = expose,
402 [FocusIn] = focus,
403 [FocusOut] = focus,
404 [MotionNotify] = bmotion,
405 [ButtonPress] = bpress,
406 [ButtonRelease] = brelease,
407 [SelectionClear] = selclear,
408 [SelectionNotify] = selnotify,
409 [SelectionRequest] = selrequest,
410 };
411
412 /* Globals */
413 static DC dc;
414 static XWindow xw;
415 static Term term;
416 static CSIEscape csiescseq;
417 static STREscape strescseq;
418 static int cmdfd;
419 static pid_t pid;
420 static Selection sel;
421 static int iofd = -1;
422 static char **opt_cmd = NULL;
423 static char *opt_io = NULL;
424 static char *opt_title = NULL;
425 static char *opt_embed = NULL;
426 static char *opt_class = NULL;
427 static char *opt_font = NULL;
428
429 static char *usedfont = NULL;
430 static int usedfontsize = 0;
431
432 /* Font Ring Cache */
433 enum {
434 FRC_NORMAL,
435 FRC_ITALIC,
436 FRC_BOLD,
437 FRC_ITALICBOLD
438 };
439
440 typedef struct {
441 XftFont *font;
442 long c;
443 int flags;
444 } Fontcache;
445
446 /*
447 * Fontcache is a ring buffer, with frccur as current position and frclen as
448 * the current length of used elements.
449 */
450
451 static Fontcache frc[1024];
452 static int frccur = -1, frclen = 0;
453
454 ssize_t
455 xwrite(int fd, char *s, size_t len) {
456 size_t aux = len;
457
458 while(len > 0) {
459 ssize_t r = write(fd, s, len);
460 if(r < 0)
461 return r;
462 len -= r;
463 s += r;
464 }
465 return aux;
466 }
467
468 void *
469 xmalloc(size_t len) {
470 void *p = malloc(len);
471
472 if(!p)
473 die("Out of memory\n");
474
475 return p;
476 }
477
478 void *
479 xrealloc(void *p, size_t len) {
480 if((p = realloc(p, len)) == NULL)
481 die("Out of memory\n");
482
483 return p;
484 }
485
486 void *
487 xcalloc(size_t nmemb, size_t size) {
488 void *p = calloc(nmemb, size);
489
490 if(!p)
491 die("Out of memory\n");
492
493 return p;
494 }
495
496 int
497 utf8decode(char *s, long *u) {
498 uchar c;
499 int i, n, rtn;
500
501 rtn = 1;
502 c = *s;
503 if(~c & B7) { /* 0xxxxxxx */
504 *u = c;
505 return rtn;
506 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
507 *u = c&(B4|B3|B2|B1|B0);
508 n = 1;
509 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
510 *u = c&(B3|B2|B1|B0);
511 n = 2;
512 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
513 *u = c & (B2|B1|B0);
514 n = 3;
515 } else {
516 goto invalid;
517 }
518
519 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
520 c = *s;
521 if((c & (B7|B6)) != B7) /* 10xxxxxx */
522 goto invalid;
523 *u <<= 6;
524 *u |= c & (B5|B4|B3|B2|B1|B0);
525 }
526
527 if((n == 1 && *u < 0x80) ||
528 (n == 2 && *u < 0x800) ||
529 (n == 3 && *u < 0x10000) ||
530 (*u >= 0xD800 && *u <= 0xDFFF)) {
531 goto invalid;
532 }
533
534 return rtn;
535 invalid:
536 *u = 0xFFFD;
537
538 return rtn;
539 }
540
541 int
542 utf8encode(long *u, char *s) {
543 uchar *sp;
544 ulong uc;
545 int i, n;
546
547 sp = (uchar *)s;
548 uc = *u;
549 if(uc < 0x80) {
550 *sp = uc; /* 0xxxxxxx */
551 return 1;
552 } else if(*u < 0x800) {
553 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
554 n = 1;
555 } else if(uc < 0x10000) {
556 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
557 n = 2;
558 } else if(uc <= 0x10FFFF) {
559 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
560 n = 3;
561 } else {
562 goto invalid;
563 }
564
565 for(i=n,++sp; i>0; --i,++sp)
566 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
567
568 return n+1;
569 invalid:
570 /* U+FFFD */
571 *s++ = '\xEF';
572 *s++ = '\xBF';
573 *s = '\xBD';
574
575 return 3;
576 }
577
578 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
579 UTF-8 otherwise return 0 */
580 int
581 isfullutf8(char *s, int b) {
582 uchar *c1, *c2, *c3;
583
584 c1 = (uchar *)s;
585 c2 = (uchar *)++s;
586 c3 = (uchar *)++s;
587 if(b < 1) {
588 return 0;
589 } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
590 return 0;
591 } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
592 ((b == 1) ||
593 ((b == 2) && (*c2&(B7|B6)) == B7))) {
594 return 0;
595 } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
596 ((b == 1) ||
597 ((b == 2) && (*c2&(B7|B6)) == B7) ||
598 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
599 return 0;
600 } else {
601 return 1;
602 }
603 }
604
605 int
606 utf8size(char *s) {
607 uchar c = *s;
608
609 if(~c&B7) {
610 return 1;
611 } else if((c&(B7|B6|B5)) == (B7|B6)) {
612 return 2;
613 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
614 return 3;
615 } else {
616 return 4;
617 }
618 }
619
620 void
621 selinit(void) {
622 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
623 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
624 sel.mode = 0;
625 sel.bx = -1;
626 sel.clip = NULL;
627 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
628 if(sel.xtarget == None)
629 sel.xtarget = XA_STRING;
630 }
631
632 static int
633 x2col(int x) {
634 x -= borderpx;
635 x /= xw.cw;
636
637 return LIMIT(x, 0, term.col-1);
638 }
639
640 static int
641 y2row(int y) {
642 y -= borderpx;
643 y /= xw.ch;
644
645 return LIMIT(y, 0, term.row-1);
646 }
647
648 static inline bool
649 selected(int x, int y) {
650 int bx, ex;
651
652 if(sel.ey == y && sel.by == y) {
653 bx = MIN(sel.bx, sel.ex);
654 ex = MAX(sel.bx, sel.ex);
655
656 return BETWEEN(x, bx, ex);
657 }
658
659 if(sel.type == SEL_RECTANGULAR) {
660 return ((sel.b.y <= y && y <= sel.e.y)
661 && (sel.b.x <= x && x <= sel.e.x));
662 }
663 return ((sel.b.y < y && y < sel.e.y)
664 || (y == sel.e.y && x <= sel.e.x))
665 || (y == sel.b.y && x >= sel.b.x
666 && (x <= sel.e.x || sel.b.y != sel.e.y));
667 }
668
669 void
670 selsnap(int mode, int *x, int *y, int direction) {
671 switch(mode) {
672 case SNAP_WORD:
673 while(*x > 0 && *x < term.col-1
674 && term.line[*y][*x + direction].c[0] != ' ') {
675 *x += direction;
676 }
677 break;
678 case SNAP_LINE:
679 *x = (direction < 0) ? 0 : term.col - 1;
680 break;
681 default:
682 break;
683 }
684 }
685
686 void
687 getbuttoninfo(XEvent *e) {
688 int type;
689 uint state = e->xbutton.state &~Button1Mask;
690
691 sel.alt = IS_SET(MODE_ALTSCREEN);
692
693 sel.ex = x2col(e->xbutton.x);
694 sel.ey = y2row(e->xbutton.y);
695
696 if (sel.by < sel.ey
697 || (sel.by == sel.ey && sel.bx < sel.ex)) {
698 selsnap(sel.snap, &sel.bx, &sel.by, -1);
699 selsnap(sel.snap, &sel.ex, &sel.ey, +1);
700 } else {
701 selsnap(sel.snap, &sel.ex, &sel.ey, -1);
702 selsnap(sel.snap, &sel.bx, &sel.by, +1);
703 }
704
705 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
706 sel.b.y = MIN(sel.by, sel.ey);
707 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
708 sel.e.y = MAX(sel.by, sel.ey);
709
710 sel.type = SEL_REGULAR;
711 for(type = 1; type < LEN(selmasks); ++type) {
712 if(match(selmasks[type], state)) {
713 sel.type = type;
714 break;
715 }
716 }
717 }
718
719 void
720 mousereport(XEvent *e) {
721 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
722 button = e->xbutton.button, state = e->xbutton.state,
723 len;
724 char buf[40];
725 static int ob, ox, oy;
726
727 /* from urxvt */
728 if(e->xbutton.type == MotionNotify) {
729 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
730 return;
731 button = ob + 32;
732 ox = x, oy = y;
733 } else if(!IS_SET(MODE_MOUSESGR)
734 && (e->xbutton.type == ButtonRelease
735 || button == AnyButton)) {
736 button = 3;
737 } else {
738 button -= Button1;
739 if(button >= 3)
740 button += 64 - 3;
741 if(e->xbutton.type == ButtonPress) {
742 ob = button;
743 ox = x, oy = y;
744 }
745 }
746
747 button += (state & ShiftMask ? 4 : 0)
748 + (state & Mod4Mask ? 8 : 0)
749 + (state & ControlMask ? 16 : 0);
750
751 len = 0;
752 if(IS_SET(MODE_MOUSESGR)) {
753 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
754 button, x+1, y+1,
755 e->xbutton.type == ButtonRelease ? 'm' : 'M');
756 } else if(x < 223 && y < 223) {
757 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
758 32+button, 32+x+1, 32+y+1);
759 } else {
760 return;
761 }
762
763 ttywrite(buf, len);
764 }
765
766 void
767 bpress(XEvent *e) {
768 struct timeval now;
769
770 if(IS_SET(MODE_MOUSE)) {
771 mousereport(e);
772 } else if(e->xbutton.button == Button1) {
773 gettimeofday(&now, NULL);
774
775 /* Clear previous selection, logically and visually. */
776 if(sel.bx != -1) {
777 sel.bx = -1;
778 tsetdirt(sel.b.y, sel.e.y);
779 draw();
780 }
781 sel.mode = 1;
782 sel.type = SEL_REGULAR;
783 sel.ex = sel.bx = x2col(e->xbutton.x);
784 sel.ey = sel.by = y2row(e->xbutton.y);
785
786 /*
787 * Snap handling.
788 * If user clicks are fasst enough (e.g. below timeouts),
789 * we ignore if his hand slipped left or down and accidentally
790 * selected more; we are just snapping to whatever we're
791 * snapping.
792 */
793 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
794 sel.snap = SNAP_LINE;
795 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
796 sel.snap = SNAP_WORD;
797 } else {
798 sel.snap = 0;
799 }
800 selsnap(sel.snap, &sel.bx, &sel.by, -1);
801 selsnap(sel.snap, &sel.ex, &sel.ey, 1);
802 sel.b.x = sel.bx;
803 sel.b.y = sel.by;
804 sel.e.x = sel.ex;
805 sel.e.y = sel.ey;
806
807 /*
808 * Draw selection, unless it's regular and we don't want to
809 * make clicks visible
810 */
811 if (sel.snap != 0) {
812 tsetdirt(sel.b.y, sel.e.y);
813 draw();
814 }
815 sel.tclick2 = sel.tclick1;
816 sel.tclick1 = now;
817 } else if(e->xbutton.button == Button4) {
818 ttywrite("\031", 1);
819 } else if(e->xbutton.button == Button5) {
820 ttywrite("\005", 1);
821 }
822 }
823
824 void
825 selcopy(void) {
826 char *str, *ptr;
827 int x, y, bufsize, size;
828 Glyph *gp, *last;
829
830 if(sel.bx == -1) {
831 str = NULL;
832 } else {
833 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
834 ptr = str = xmalloc(bufsize);
835
836 /* append every set & selected glyph to the selection */
837 for(y = sel.b.y; y < sel.e.y + 1; y++) {
838 gp = &term.line[y][0];
839 last = gp + term.col;
840
841 while(--last >= gp && !(selected(last - gp, y) && \
842 strcmp(last->c, " ") != 0))
843 /* nothing */;
844
845 for(x = 0; gp <= last; x++, ++gp) {
846 if(!selected(x, y))
847 continue;
848
849 size = utf8size(gp->c);
850 memcpy(ptr, gp->c, size);
851 ptr += size;
852 }
853
854 /*
855 * Copy and pasting of line endings is inconsistent
856 * in the inconsistent terminal and GUI world.
857 * The best solution seems like to produce '\n' when
858 * something is copied from st and convert '\n' to
859 * '\r', when something to be pasted is received by
860 * st.
861 * FIXME: Fix the computer world.
862 */
863 if(y < sel.e.y && !((gp-1)->mode & ATTR_WRAP))
864 *ptr++ = '\n';
865 }
866 *ptr = 0;
867 }
868 xsetsel(str);
869 }
870
871 void
872 selnotify(XEvent *e) {
873 ulong nitems, ofs, rem;
874 int format;
875 uchar *data, *last, *repl;
876 Atom type;
877
878 ofs = 0;
879 do {
880 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
881 False, AnyPropertyType, &type, &format,
882 &nitems, &rem, &data)) {
883 fprintf(stderr, "Clipboard allocation failed\n");
884 return;
885 }
886
887 /*
888 * As seen in selcopy:
889 * Line endings are inconsistent in the terminal and GUI world
890 * copy and pasting. When receiving some selection data,
891 * replace all '\n' with '\r'.
892 * FIXME: Fix the computer world.
893 */
894 repl = data;
895 last = data + nitems * format / 8;
896 while((repl = memchr(repl, '\n', last - repl))) {
897 *repl++ = '\r';
898 }
899
900 ttywrite((const char *)data, nitems * format / 8);
901 XFree(data);
902 /* number of 32-bit chunks returned */
903 ofs += nitems * format / 32;
904 } while(rem > 0);
905 }
906
907 void
908 selpaste(const Arg *dummy) {
909 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
910 xw.win, CurrentTime);
911 }
912
913 void
914 clippaste(const Arg *dummy) {
915 Atom clipboard;
916
917 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
918 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
919 xw.win, CurrentTime);
920 }
921
922 void
923 selclear(XEvent *e) {
924 if(sel.bx == -1)
925 return;
926 sel.bx = -1;
927 tsetdirt(sel.b.y, sel.e.y);
928 }
929
930 void
931 selrequest(XEvent *e) {
932 XSelectionRequestEvent *xsre;
933 XSelectionEvent xev;
934 Atom xa_targets, string;
935
936 xsre = (XSelectionRequestEvent *) e;
937 xev.type = SelectionNotify;
938 xev.requestor = xsre->requestor;
939 xev.selection = xsre->selection;
940 xev.target = xsre->target;
941 xev.time = xsre->time;
942 /* reject */
943 xev.property = None;
944
945 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
946 if(xsre->target == xa_targets) {
947 /* respond with the supported type */
948 string = sel.xtarget;
949 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
950 XA_ATOM, 32, PropModeReplace,
951 (uchar *) &string, 1);
952 xev.property = xsre->property;
953 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
954 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
955 xsre->target, 8, PropModeReplace,
956 (uchar *) sel.clip, strlen(sel.clip));
957 xev.property = xsre->property;
958 }
959
960 /* all done, send a notification to the listener */
961 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
962 fprintf(stderr, "Error sending SelectionNotify event\n");
963 }
964
965 void
966 xsetsel(char *str) {
967 /* register the selection for both the clipboard and the primary */
968 Atom clipboard;
969
970 free(sel.clip);
971 sel.clip = str;
972
973 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
974
975 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
976 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
977 }
978
979 void
980 brelease(XEvent *e) {
981 if(IS_SET(MODE_MOUSE)) {
982 mousereport(e);
983 return;
984 }
985
986 if(e->xbutton.button == Button2) {
987 selpaste(NULL);
988 } else if(e->xbutton.button == Button1) {
989 sel.mode = 0;
990 getbuttoninfo(e);
991 term.dirty[sel.ey] = 1;
992 if(sel.bx == sel.ex && sel.by == sel.ey) {
993 sel.bx = -1;
994 } else {
995 selcopy();
996 }
997 }
998 }
999
1000 void
1001 bmotion(XEvent *e) {
1002 int oldey, oldex, oldsby, oldsey;
1003
1004 if(IS_SET(MODE_MOUSE)) {
1005 mousereport(e);
1006 return;
1007 }
1008
1009 if(!sel.mode)
1010 return;
1011
1012 oldey = sel.ey;
1013 oldex = sel.ex;
1014 oldsby = sel.b.y;
1015 oldsey = sel.e.y;
1016 getbuttoninfo(e);
1017
1018 if(oldey != sel.ey || oldex != sel.ex) {
1019 tsetdirt(MIN(sel.b.y, oldsby), MAX(sel.e.y, oldsey));
1020 }
1021 }
1022
1023 void
1024 die(const char *errstr, ...) {
1025 va_list ap;
1026
1027 va_start(ap, errstr);
1028 vfprintf(stderr, errstr, ap);
1029 va_end(ap);
1030 exit(EXIT_FAILURE);
1031 }
1032
1033 void
1034 execsh(void) {
1035 char **args;
1036 char *envshell = getenv("SHELL");
1037 const struct passwd *pass = getpwuid(getuid());
1038 char buf[sizeof(long) * 8 + 1];
1039
1040 unsetenv("COLUMNS");
1041 unsetenv("LINES");
1042 unsetenv("TERMCAP");
1043
1044 if(pass) {
1045 setenv("LOGNAME", pass->pw_name, 1);
1046 setenv("USER", pass->pw_name, 1);
1047 setenv("SHELL", pass->pw_shell, 0);
1048 setenv("HOME", pass->pw_dir, 0);
1049 }
1050
1051 snprintf(buf, sizeof(buf), "%lu", xw.win);
1052 setenv("WINDOWID", buf, 1);
1053
1054 signal(SIGCHLD, SIG_DFL);
1055 signal(SIGHUP, SIG_DFL);
1056 signal(SIGINT, SIG_DFL);
1057 signal(SIGQUIT, SIG_DFL);
1058 signal(SIGTERM, SIG_DFL);
1059 signal(SIGALRM, SIG_DFL);
1060
1061 DEFAULT(envshell, shell);
1062 setenv("TERM", termname, 1);
1063 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1064 execvp(args[0], args);
1065 exit(EXIT_FAILURE);
1066 }
1067
1068 void
1069 sigchld(int a) {
1070 int stat = 0;
1071
1072 if(waitpid(pid, &stat, 0) < 0)
1073 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1074
1075 if(WIFEXITED(stat)) {
1076 exit(WEXITSTATUS(stat));
1077 } else {
1078 exit(EXIT_FAILURE);
1079 }
1080 }
1081
1082 void
1083 ttynew(void) {
1084 int m, s;
1085 struct winsize w = {term.row, term.col, 0, 0};
1086
1087 /* seems to work fine on linux, openbsd and freebsd */
1088 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1089 die("openpty failed: %s\n", SERRNO);
1090
1091 switch(pid = fork()) {
1092 case -1:
1093 die("fork failed\n");
1094 break;
1095 case 0:
1096 setsid(); /* create a new process group */
1097 dup2(s, STDIN_FILENO);
1098 dup2(s, STDOUT_FILENO);
1099 dup2(s, STDERR_FILENO);
1100 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1101 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1102 close(s);
1103 close(m);
1104 execsh();
1105 break;
1106 default:
1107 close(s);
1108 cmdfd = m;
1109 signal(SIGCHLD, sigchld);
1110 if(opt_io) {
1111 iofd = (!strcmp(opt_io, "-")) ?
1112 STDOUT_FILENO :
1113 open(opt_io, O_WRONLY | O_CREAT, 0666);
1114 if(iofd < 0) {
1115 fprintf(stderr, "Error opening %s:%s\n",
1116 opt_io, strerror(errno));
1117 }
1118 }
1119 }
1120 }
1121
1122 void
1123 dump(char c) {
1124 static int col;
1125
1126 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1127 if(++col % 10 == 0)
1128 fprintf(stderr, "\n");
1129 }
1130
1131 void
1132 ttyread(void) {
1133 static char buf[BUFSIZ];
1134 static int buflen = 0;
1135 char *ptr;
1136 char s[UTF_SIZ];
1137 int charsize; /* size of utf8 char in bytes */
1138 long utf8c;
1139 int ret;
1140
1141 /* append read bytes to unprocessed bytes */
1142 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1143 die("Couldn't read from shell: %s\n", SERRNO);
1144
1145 /* process every complete utf8 char */
1146 buflen += ret;
1147 ptr = buf;
1148 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1149 charsize = utf8decode(ptr, &utf8c);
1150 utf8encode(&utf8c, s);
1151 tputc(s, charsize);
1152 ptr += charsize;
1153 buflen -= charsize;
1154 }
1155
1156 /* keep any uncomplete utf8 char for the next call */
1157 memmove(buf, ptr, buflen);
1158 }
1159
1160 void
1161 ttywrite(const char *s, size_t n) {
1162 if(write(cmdfd, s, n) == -1)
1163 die("write error on tty: %s\n", SERRNO);
1164 }
1165
1166 void
1167 ttyresize(void) {
1168 struct winsize w;
1169
1170 w.ws_row = term.row;
1171 w.ws_col = term.col;
1172 w.ws_xpixel = xw.tw;
1173 w.ws_ypixel = xw.th;
1174 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1175 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1176 }
1177
1178 void
1179 tsetdirt(int top, int bot) {
1180 int i;
1181
1182 LIMIT(top, 0, term.row-1);
1183 LIMIT(bot, 0, term.row-1);
1184
1185 for(i = top; i <= bot; i++)
1186 term.dirty[i] = 1;
1187 }
1188
1189 void
1190 tfulldirt(void) {
1191 tsetdirt(0, term.row-1);
1192 }
1193
1194 void
1195 tcursor(int mode) {
1196 static TCursor c;
1197
1198 if(mode == CURSOR_SAVE) {
1199 c = term.c;
1200 } else if(mode == CURSOR_LOAD) {
1201 term.c = c;
1202 tmoveto(c.x, c.y);
1203 }
1204 }
1205
1206 void
1207 treset(void) {
1208 uint i;
1209
1210 term.c = (TCursor){{
1211 .mode = ATTR_NULL,
1212 .fg = defaultfg,
1213 .bg = defaultbg
1214 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1215
1216 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1217 for(i = tabspaces; i < term.col; i += tabspaces)
1218 term.tabs[i] = 1;
1219 term.top = 0;
1220 term.bot = term.row - 1;
1221 term.mode = MODE_WRAP;
1222
1223 tclearregion(0, 0, term.col-1, term.row-1);
1224 tmoveto(0, 0);
1225 tcursor(CURSOR_SAVE);
1226 }
1227
1228 void
1229 tnew(int col, int row) {
1230 memset(&term, 0, sizeof(Term));
1231 tresize(col, row);
1232 term.numlock = 1;
1233
1234 treset();
1235 }
1236
1237 void
1238 tswapscreen(void) {
1239 Line *tmp = term.line;
1240
1241 term.line = term.alt;
1242 term.alt = tmp;
1243 term.mode ^= MODE_ALTSCREEN;
1244 tfulldirt();
1245 }
1246
1247 void
1248 tscrolldown(int orig, int n) {
1249 int i;
1250 Line temp;
1251
1252 LIMIT(n, 0, term.bot-orig+1);
1253
1254 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1255
1256 for(i = term.bot; i >= orig+n; i--) {
1257 temp = term.line[i];
1258 term.line[i] = term.line[i-n];
1259 term.line[i-n] = temp;
1260
1261 term.dirty[i] = 1;
1262 term.dirty[i-n] = 1;
1263 }
1264
1265 selscroll(orig, n);
1266 }
1267
1268 void
1269 tscrollup(int orig, int n) {
1270 int i;
1271 Line temp;
1272 LIMIT(n, 0, term.bot-orig+1);
1273
1274 tclearregion(0, orig, term.col-1, orig+n-1);
1275
1276 for(i = orig; i <= term.bot-n; i++) {
1277 temp = term.line[i];
1278 term.line[i] = term.line[i+n];
1279 term.line[i+n] = temp;
1280
1281 term.dirty[i] = 1;
1282 term.dirty[i+n] = 1;
1283 }
1284
1285 selscroll(orig, -n);
1286 }
1287
1288 void
1289 selscroll(int orig, int n) {
1290 if(sel.bx == -1)
1291 return;
1292
1293 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1294 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1295 sel.bx = -1;
1296 return;
1297 }
1298 if(sel.type == SEL_RECTANGULAR) {
1299 if(sel.by < term.top)
1300 sel.by = term.top;
1301 if(sel.ey > term.bot)
1302 sel.ey = term.bot;
1303 } else {
1304 if(sel.by < term.top) {
1305 sel.by = term.top;
1306 sel.bx = 0;
1307 }
1308 if(sel.ey > term.bot) {
1309 sel.ey = term.bot;
1310 sel.ex = term.col;
1311 }
1312 }
1313 sel.b.y = sel.by, sel.b.x = sel.bx;
1314 sel.e.y = sel.ey, sel.e.x = sel.ex;
1315 }
1316 }
1317
1318 void
1319 tnewline(int first_col) {
1320 int y = term.c.y;
1321
1322 if(y == term.bot) {
1323 tscrollup(term.top, 1);
1324 } else {
1325 y++;
1326 }
1327 tmoveto(first_col ? 0 : term.c.x, y);
1328 }
1329
1330 void
1331 csiparse(void) {
1332 char *p = csiescseq.buf, *np;
1333 long int v;
1334
1335 csiescseq.narg = 0;
1336 if(*p == '?') {
1337 csiescseq.priv = 1;
1338 p++;
1339 }
1340
1341 csiescseq.buf[csiescseq.len] = '\0';
1342 while(p < csiescseq.buf+csiescseq.len) {
1343 np = NULL;
1344 v = strtol(p, &np, 10);
1345 if(np == p)
1346 v = 0;
1347 if(v == LONG_MAX || v == LONG_MIN)
1348 v = -1;
1349 csiescseq.arg[csiescseq.narg++] = v;
1350 p = np;
1351 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1352 break;
1353 p++;
1354 }
1355 csiescseq.mode = *p;
1356 }
1357
1358 /* for absolute user moves, when decom is set */
1359 void
1360 tmoveato(int x, int y) {
1361 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1362 }
1363
1364 void
1365 tmoveto(int x, int y) {
1366 int miny, maxy;
1367
1368 if(term.c.state & CURSOR_ORIGIN) {
1369 miny = term.top;
1370 maxy = term.bot;
1371 } else {
1372 miny = 0;
1373 maxy = term.row - 1;
1374 }
1375 LIMIT(x, 0, term.col-1);
1376 LIMIT(y, miny, maxy);
1377 term.c.state &= ~CURSOR_WRAPNEXT;
1378 term.c.x = x;
1379 term.c.y = y;
1380 }
1381
1382 void
1383 tsetchar(char *c, Glyph *attr, int x, int y) {
1384 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1385 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1386 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1387 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1388 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1389 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1390 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1391 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1392 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1393 };
1394
1395 /*
1396 * The table is proudly stolen from rxvt.
1397 */
1398 if(attr->mode & ATTR_GFX) {
1399 if(c[0] >= 0x41 && c[0] <= 0x7e
1400 && vt100_0[c[0] - 0x41]) {
1401 c = vt100_0[c[0] - 0x41];
1402 }
1403 }
1404
1405 term.dirty[y] = 1;
1406 term.line[y][x] = *attr;
1407 memcpy(term.line[y][x].c, c, UTF_SIZ);
1408 }
1409
1410 void
1411 tclearregion(int x1, int y1, int x2, int y2) {
1412 int x, y, temp;
1413
1414 if(x1 > x2)
1415 temp = x1, x1 = x2, x2 = temp;
1416 if(y1 > y2)
1417 temp = y1, y1 = y2, y2 = temp;
1418
1419 LIMIT(x1, 0, term.col-1);
1420 LIMIT(x2, 0, term.col-1);
1421 LIMIT(y1, 0, term.row-1);
1422 LIMIT(y2, 0, term.row-1);
1423
1424 for(y = y1; y <= y2; y++) {
1425 term.dirty[y] = 1;
1426 for(x = x1; x <= x2; x++) {
1427 term.line[y][x] = term.c.attr;
1428 memcpy(term.line[y][x].c, " ", 2);
1429 }
1430 }
1431 }
1432
1433 void
1434 tdeletechar(int n) {
1435 int src = term.c.x + n;
1436 int dst = term.c.x;
1437 int size = term.col - src;
1438
1439 term.dirty[term.c.y] = 1;
1440
1441 if(src >= term.col) {
1442 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1443 return;
1444 }
1445
1446 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1447 size * sizeof(Glyph));
1448 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1449 }
1450
1451 void
1452 tinsertblank(int n) {
1453 int src = term.c.x;
1454 int dst = src + n;
1455 int size = term.col - dst;
1456
1457 term.dirty[term.c.y] = 1;
1458
1459 if(dst >= term.col) {
1460 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1461 return;
1462 }
1463
1464 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1465 size * sizeof(Glyph));
1466 tclearregion(src, term.c.y, dst - 1, term.c.y);
1467 }
1468
1469 void
1470 tinsertblankline(int n) {
1471 if(term.c.y < term.top || term.c.y > term.bot)
1472 return;
1473
1474 tscrolldown(term.c.y, n);
1475 }
1476
1477 void
1478 tdeleteline(int n) {
1479 if(term.c.y < term.top || term.c.y > term.bot)
1480 return;
1481
1482 tscrollup(term.c.y, n);
1483 }
1484
1485 void
1486 tsetattr(int *attr, int l) {
1487 int i;
1488
1489 for(i = 0; i < l; i++) {
1490 switch(attr[i]) {
1491 case 0:
1492 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1493 | ATTR_BOLD | ATTR_ITALIC \
1494 | ATTR_BLINK);
1495 term.c.attr.fg = defaultfg;
1496 term.c.attr.bg = defaultbg;
1497 break;
1498 case 1:
1499 term.c.attr.mode |= ATTR_BOLD;
1500 break;
1501 case 3:
1502 term.c.attr.mode |= ATTR_ITALIC;
1503 break;
1504 case 4:
1505 term.c.attr.mode |= ATTR_UNDERLINE;
1506 break;
1507 case 5: /* slow blink */
1508 case 6: /* rapid blink */
1509 term.c.attr.mode |= ATTR_BLINK;
1510 break;
1511 case 7:
1512 term.c.attr.mode |= ATTR_REVERSE;
1513 break;
1514 case 21:
1515 case 22:
1516 term.c.attr.mode &= ~ATTR_BOLD;
1517 break;
1518 case 23:
1519 term.c.attr.mode &= ~ATTR_ITALIC;
1520 break;
1521 case 24:
1522 term.c.attr.mode &= ~ATTR_UNDERLINE;
1523 break;
1524 case 25:
1525 case 26:
1526 term.c.attr.mode &= ~ATTR_BLINK;
1527 break;
1528 case 27:
1529 term.c.attr.mode &= ~ATTR_REVERSE;
1530 break;
1531 case 38:
1532 if(i + 2 < l && attr[i + 1] == 5) {
1533 i += 2;
1534 if(BETWEEN(attr[i], 0, 255)) {
1535 term.c.attr.fg = attr[i];
1536 } else {
1537 fprintf(stderr,
1538 "erresc: bad fgcolor %d\n",
1539 attr[i]);
1540 }
1541 } else {
1542 fprintf(stderr,
1543 "erresc(38): gfx attr %d unknown\n",
1544 attr[i]);
1545 }
1546 break;
1547 case 39:
1548 term.c.attr.fg = defaultfg;
1549 break;
1550 case 48:
1551 if(i + 2 < l && attr[i + 1] == 5) {
1552 i += 2;
1553 if(BETWEEN(attr[i], 0, 255)) {
1554 term.c.attr.bg = attr[i];
1555 } else {
1556 fprintf(stderr,
1557 "erresc: bad bgcolor %d\n",
1558 attr[i]);
1559 }
1560 } else {
1561 fprintf(stderr,
1562 "erresc(48): gfx attr %d unknown\n",
1563 attr[i]);
1564 }
1565 break;
1566 case 49:
1567 term.c.attr.bg = defaultbg;
1568 break;
1569 default:
1570 if(BETWEEN(attr[i], 30, 37)) {
1571 term.c.attr.fg = attr[i] - 30;
1572 } else if(BETWEEN(attr[i], 40, 47)) {
1573 term.c.attr.bg = attr[i] - 40;
1574 } else if(BETWEEN(attr[i], 90, 97)) {
1575 term.c.attr.fg = attr[i] - 90 + 8;
1576 } else if(BETWEEN(attr[i], 100, 107)) {
1577 term.c.attr.bg = attr[i] - 100 + 8;
1578 } else {
1579 fprintf(stderr,
1580 "erresc(default): gfx attr %d unknown\n",
1581 attr[i]), csidump();
1582 }
1583 break;
1584 }
1585 }
1586 }
1587
1588 void
1589 tsetscroll(int t, int b) {
1590 int temp;
1591
1592 LIMIT(t, 0, term.row-1);
1593 LIMIT(b, 0, term.row-1);
1594 if(t > b) {
1595 temp = t;
1596 t = b;
1597 b = temp;
1598 }
1599 term.top = t;
1600 term.bot = b;
1601 }
1602
1603 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1604
1605 void
1606 tsetmode(bool priv, bool set, int *args, int narg) {
1607 int *lim, mode;
1608 bool alt;
1609
1610 for(lim = args + narg; args < lim; ++args) {
1611 if(priv) {
1612 switch(*args) {
1613 break;
1614 case 1: /* DECCKM -- Cursor key */
1615 MODBIT(term.mode, set, MODE_APPCURSOR);
1616 break;
1617 case 5: /* DECSCNM -- Reverse video */
1618 mode = term.mode;
1619 MODBIT(term.mode, set, MODE_REVERSE);
1620 if(mode != term.mode)
1621 redraw(REDRAW_TIMEOUT);
1622 break;
1623 case 6: /* DECOM -- Origin */
1624 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1625 tmoveato(0, 0);
1626 break;
1627 case 7: /* DECAWM -- Auto wrap */
1628 MODBIT(term.mode, set, MODE_WRAP);
1629 break;
1630 case 0: /* Error (IGNORED) */
1631 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1632 case 3: /* DECCOLM -- Column (IGNORED) */
1633 case 4: /* DECSCLM -- Scroll (IGNORED) */
1634 case 8: /* DECARM -- Auto repeat (IGNORED) */
1635 case 18: /* DECPFF -- Printer feed (IGNORED) */
1636 case 19: /* DECPEX -- Printer extent (IGNORED) */
1637 case 42: /* DECNRCM -- National characters (IGNORED) */
1638 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1639 break;
1640 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1641 MODBIT(term.mode, !set, MODE_HIDE);
1642 break;
1643 case 1000: /* 1000,1002: enable xterm mouse report */
1644 MODBIT(term.mode, set, MODE_MOUSEBTN);
1645 MODBIT(term.mode, 0, MODE_MOUSEMOTION);
1646 break;
1647 case 1002:
1648 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1649 MODBIT(term.mode, 0, MODE_MOUSEBTN);
1650 break;
1651 case 1006:
1652 MODBIT(term.mode, set, MODE_MOUSESGR);
1653 break;
1654 case 1034:
1655 MODBIT(term.mode, set, MODE_8BIT);
1656 break;
1657 case 1049: /* = 1047 and 1048 */
1658 case 47:
1659 case 1047:
1660 if (!allowaltscreen)
1661 break;
1662
1663 alt = IS_SET(MODE_ALTSCREEN);
1664 if(alt) {
1665 tclearregion(0, 0, term.col-1,
1666 term.row-1);
1667 }
1668 if(set ^ alt) /* set is always 1 or 0 */
1669 tswapscreen();
1670 if(*args != 1049)
1671 break;
1672 /* FALLTRU */
1673 case 1048:
1674 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1675 break;
1676 default:
1677 fprintf(stderr,
1678 "erresc: unknown private set/reset mode %d\n",
1679 *args);
1680 break;
1681 }
1682 } else {
1683 switch(*args) {
1684 case 0: /* Error (IGNORED) */
1685 break;
1686 case 2: /* KAM -- keyboard action */
1687 MODBIT(term.mode, set, MODE_KBDLOCK);
1688 break;
1689 case 4: /* IRM -- Insertion-replacement */
1690 MODBIT(term.mode, set, MODE_INSERT);
1691 break;
1692 case 12: /* SRM -- Send/Receive */
1693 MODBIT(term.mode, !set, MODE_ECHO);
1694 break;
1695 case 20: /* LNM -- Linefeed/new line */
1696 MODBIT(term.mode, set, MODE_CRLF);
1697 break;
1698 default:
1699 fprintf(stderr,
1700 "erresc: unknown set/reset mode %d\n",
1701 *args);
1702 break;
1703 }
1704 }
1705 }
1706 }
1707 #undef MODBIT
1708
1709
1710 void
1711 csihandle(void) {
1712 switch(csiescseq.mode) {
1713 default:
1714 unknown:
1715 fprintf(stderr, "erresc: unknown csi ");
1716 csidump();
1717 /* die(""); */
1718 break;
1719 case '@': /* ICH -- Insert <n> blank char */
1720 DEFAULT(csiescseq.arg[0], 1);
1721 tinsertblank(csiescseq.arg[0]);
1722 break;
1723 case 'A': /* CUU -- Cursor <n> Up */
1724 DEFAULT(csiescseq.arg[0], 1);
1725 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1726 break;
1727 case 'B': /* CUD -- Cursor <n> Down */
1728 case 'e': /* VPR --Cursor <n> Down */
1729 DEFAULT(csiescseq.arg[0], 1);
1730 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1731 break;
1732 case 'c': /* DA -- Device Attributes */
1733 if(csiescseq.arg[0] == 0)
1734 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1735 break;
1736 case 'C': /* CUF -- Cursor <n> Forward */
1737 case 'a': /* HPR -- Cursor <n> Forward */
1738 DEFAULT(csiescseq.arg[0], 1);
1739 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1740 break;
1741 case 'D': /* CUB -- Cursor <n> Backward */
1742 DEFAULT(csiescseq.arg[0], 1);
1743 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1744 break;
1745 case 'E': /* CNL -- Cursor <n> Down and first col */
1746 DEFAULT(csiescseq.arg[0], 1);
1747 tmoveto(0, term.c.y+csiescseq.arg[0]);
1748 break;
1749 case 'F': /* CPL -- Cursor <n> Up and first col */
1750 DEFAULT(csiescseq.arg[0], 1);
1751 tmoveto(0, term.c.y-csiescseq.arg[0]);
1752 break;
1753 case 'g': /* TBC -- Tabulation clear */
1754 switch(csiescseq.arg[0]) {
1755 case 0: /* clear current tab stop */
1756 term.tabs[term.c.x] = 0;
1757 break;
1758 case 3: /* clear all the tabs */
1759 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1760 break;
1761 default:
1762 goto unknown;
1763 }
1764 break;
1765 case 'G': /* CHA -- Move to <col> */
1766 case '`': /* HPA */
1767 DEFAULT(csiescseq.arg[0], 1);
1768 tmoveto(csiescseq.arg[0]-1, term.c.y);
1769 break;
1770 case 'H': /* CUP -- Move to <row> <col> */
1771 case 'f': /* HVP */
1772 DEFAULT(csiescseq.arg[0], 1);
1773 DEFAULT(csiescseq.arg[1], 1);
1774 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1775 break;
1776 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1777 DEFAULT(csiescseq.arg[0], 1);
1778 while(csiescseq.arg[0]--)
1779 tputtab(1);
1780 break;
1781 case 'J': /* ED -- Clear screen */
1782 sel.bx = -1;
1783 switch(csiescseq.arg[0]) {
1784 case 0: /* below */
1785 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1786 if(term.c.y < term.row-1) {
1787 tclearregion(0, term.c.y+1, term.col-1,
1788 term.row-1);
1789 }
1790 break;
1791 case 1: /* above */
1792 if(term.c.y > 1)
1793 tclearregion(0, 0, term.col-1, term.c.y-1);
1794 tclearregion(0, term.c.y, term.c.x, term.c.y);
1795 break;
1796 case 2: /* all */
1797 tclearregion(0, 0, term.col-1, term.row-1);
1798 break;
1799 default:
1800 goto unknown;
1801 }
1802 break;
1803 case 'K': /* EL -- Clear line */
1804 switch(csiescseq.arg[0]) {
1805 case 0: /* right */
1806 tclearregion(term.c.x, term.c.y, term.col-1,
1807 term.c.y);
1808 break;
1809 case 1: /* left */
1810 tclearregion(0, term.c.y, term.c.x, term.c.y);
1811 break;
1812 case 2: /* all */
1813 tclearregion(0, term.c.y, term.col-1, term.c.y);
1814 break;
1815 }
1816 break;
1817 case 'S': /* SU -- Scroll <n> line up */
1818 DEFAULT(csiescseq.arg[0], 1);
1819 tscrollup(term.top, csiescseq.arg[0]);
1820 break;
1821 case 'T': /* SD -- Scroll <n> line down */
1822 DEFAULT(csiescseq.arg[0], 1);
1823 tscrolldown(term.top, csiescseq.arg[0]);
1824 break;
1825 case 'L': /* IL -- Insert <n> blank lines */
1826 DEFAULT(csiescseq.arg[0], 1);
1827 tinsertblankline(csiescseq.arg[0]);
1828 break;
1829 case 'l': /* RM -- Reset Mode */
1830 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1831 break;
1832 case 'M': /* DL -- Delete <n> lines */
1833 DEFAULT(csiescseq.arg[0], 1);
1834 tdeleteline(csiescseq.arg[0]);
1835 break;
1836 case 'X': /* ECH -- Erase <n> char */
1837 DEFAULT(csiescseq.arg[0], 1);
1838 tclearregion(term.c.x, term.c.y,
1839 term.c.x + csiescseq.arg[0] - 1, term.c.y);
1840 break;
1841 case 'P': /* DCH -- Delete <n> char */
1842 DEFAULT(csiescseq.arg[0], 1);
1843 tdeletechar(csiescseq.arg[0]);
1844 break;
1845 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1846 DEFAULT(csiescseq.arg[0], 1);
1847 while(csiescseq.arg[0]--)
1848 tputtab(0);
1849 break;
1850 case 'd': /* VPA -- Move to <row> */
1851 DEFAULT(csiescseq.arg[0], 1);
1852 tmoveato(term.c.x, csiescseq.arg[0]-1);
1853 break;
1854 case 'h': /* SM -- Set terminal mode */
1855 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1856 break;
1857 case 'm': /* SGR -- Terminal attribute (color) */
1858 tsetattr(csiescseq.arg, csiescseq.narg);
1859 break;
1860 case 'r': /* DECSTBM -- Set Scrolling Region */
1861 if(csiescseq.priv) {
1862 goto unknown;
1863 } else {
1864 DEFAULT(csiescseq.arg[0], 1);
1865 DEFAULT(csiescseq.arg[1], term.row);
1866 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1867 tmoveato(0, 0);
1868 }
1869 break;
1870 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1871 tcursor(CURSOR_SAVE);
1872 break;
1873 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1874 tcursor(CURSOR_LOAD);
1875 break;
1876 }
1877 }
1878
1879 void
1880 csidump(void) {
1881 int i;
1882 uint c;
1883
1884 printf("ESC[");
1885 for(i = 0; i < csiescseq.len; i++) {
1886 c = csiescseq.buf[i] & 0xff;
1887 if(isprint(c)) {
1888 putchar(c);
1889 } else if(c == '\n') {
1890 printf("(\\n)");
1891 } else if(c == '\r') {
1892 printf("(\\r)");
1893 } else if(c == 0x1b) {
1894 printf("(\\e)");
1895 } else {
1896 printf("(%02x)", c);
1897 }
1898 }
1899 putchar('\n');
1900 }
1901
1902 void
1903 csireset(void) {
1904 memset(&csiescseq, 0, sizeof(csiescseq));
1905 }
1906
1907 void
1908 strhandle(void) {
1909 char *p = NULL;
1910 int i, j, narg;
1911
1912 strparse();
1913 narg = strescseq.narg;
1914
1915 switch(strescseq.type) {
1916 case ']': /* OSC -- Operating System Command */
1917 switch(i = atoi(strescseq.args[0])) {
1918 case 0:
1919 case 1:
1920 case 2:
1921 if(narg > 1)
1922 xsettitle(strescseq.args[1]);
1923 break;
1924 case 4: /* color set */
1925 if(narg < 3)
1926 break;
1927 p = strescseq.args[2];
1928 /* fall through */
1929 case 104: /* color reset, here p = NULL */
1930 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
1931 if (!xsetcolorname(j, p)) {
1932 fprintf(stderr, "erresc: invalid color %s\n", p);
1933 } else {
1934 /*
1935 * TODO if defaultbg color is changed, borders
1936 * are dirty
1937 */
1938 redraw(0);
1939 }
1940 break;
1941 default:
1942 fprintf(stderr, "erresc: unknown str ");
1943 strdump();
1944 break;
1945 }
1946 break;
1947 case 'k': /* old title set compatibility */
1948 xsettitle(strescseq.args[0]);
1949 break;
1950 case 'P': /* DSC -- Device Control String */
1951 case '_': /* APC -- Application Program Command */
1952 case '^': /* PM -- Privacy Message */
1953 default:
1954 fprintf(stderr, "erresc: unknown str ");
1955 strdump();
1956 /* die(""); */
1957 break;
1958 }
1959 }
1960
1961 void
1962 strparse(void) {
1963 char *p = strescseq.buf;
1964
1965 strescseq.narg = 0;
1966 strescseq.buf[strescseq.len] = '\0';
1967 while(p && strescseq.narg < STR_ARG_SIZ)
1968 strescseq.args[strescseq.narg++] = strsep(&p, ";");
1969 }
1970
1971 void
1972 strdump(void) {
1973 int i;
1974 uint c;
1975
1976 printf("ESC%c", strescseq.type);
1977 for(i = 0; i < strescseq.len; i++) {
1978 c = strescseq.buf[i] & 0xff;
1979 if(c == '\0') {
1980 return;
1981 } else if(isprint(c)) {
1982 putchar(c);
1983 } else if(c == '\n') {
1984 printf("(\\n)");
1985 } else if(c == '\r') {
1986 printf("(\\r)");
1987 } else if(c == 0x1b) {
1988 printf("(\\e)");
1989 } else {
1990 printf("(%02x)", c);
1991 }
1992 }
1993 printf("ESC\\\n");
1994 }
1995
1996 void
1997 strreset(void) {
1998 memset(&strescseq, 0, sizeof(strescseq));
1999 }
2000
2001 void
2002 tputtab(bool forward) {
2003 uint x = term.c.x;
2004
2005 if(forward) {
2006 if(x == term.col)
2007 return;
2008 for(++x; x < term.col && !term.tabs[x]; ++x)
2009 /* nothing */ ;
2010 } else {
2011 if(x == 0)
2012 return;
2013 for(--x; x > 0 && !term.tabs[x]; --x)
2014 /* nothing */ ;
2015 }
2016 tmoveto(x, term.c.y);
2017 }
2018
2019 void
2020 techo(char *buf, int len) {
2021 for(; len > 0; buf++, len--) {
2022 char c = *buf;
2023
2024 if(c == '\033') { /* escape */
2025 tputc("^", 1);
2026 tputc("[", 1);
2027 } else if(c < '\x20') { /* control code */
2028 if(c != '\n' && c != '\r' && c != '\t') {
2029 c |= '\x40';
2030 tputc("^", 1);
2031 }
2032 tputc(&c, 1);
2033 } else {
2034 break;
2035 }
2036 }
2037 if(len)
2038 tputc(buf, len);
2039 }
2040
2041 void
2042 tputc(char *c, int len) {
2043 uchar ascii = *c;
2044 bool control = ascii < '\x20' || ascii == 0177;
2045
2046 if(iofd != -1) {
2047 if(xwrite(iofd, c, len) < 0) {
2048 fprintf(stderr, "Error writing in %s:%s\n",
2049 opt_io, strerror(errno));
2050 close(iofd);
2051 iofd = -1;
2052 }
2053 }
2054
2055 /*
2056 * STR sequences must be checked before anything else
2057 * because it can use some control codes as part of the sequence.
2058 */
2059 if(term.esc & ESC_STR) {
2060 switch(ascii) {
2061 case '\033':
2062 term.esc = ESC_START | ESC_STR_END;
2063 break;
2064 case '\a': /* backwards compatibility to xterm */
2065 term.esc = 0;
2066 strhandle();
2067 break;
2068 default:
2069 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2070 memmove(&strescseq.buf[strescseq.len], c, len);
2071 strescseq.len += len;
2072 } else {
2073 /*
2074 * Here is a bug in terminals. If the user never sends
2075 * some code to stop the str or esc command, then st
2076 * will stop responding. But this is better than
2077 * silently failing with unknown characters. At least
2078 * then users will report back.
2079 *
2080 * In the case users ever get fixed, here is the code:
2081 */
2082 /*
2083 * term.esc = 0;
2084 * strhandle();
2085 */
2086 }
2087 }
2088 return;
2089 }
2090
2091 /*
2092 * Actions of control codes must be performed as soon they arrive
2093 * because they can be embedded inside a control sequence, and
2094 * they must not cause conflicts with sequences.
2095 */
2096 if(control) {
2097 switch(ascii) {
2098 case '\t': /* HT */
2099 tputtab(1);
2100 return;
2101 case '\b': /* BS */
2102 tmoveto(term.c.x-1, term.c.y);
2103 return;
2104 case '\r': /* CR */
2105 tmoveto(0, term.c.y);
2106 return;
2107 case '\f': /* LF */
2108 case '\v': /* VT */
2109 case '\n': /* LF */
2110 /* go to first col if the mode is set */
2111 tnewline(IS_SET(MODE_CRLF));
2112 return;
2113 case '\a': /* BEL */
2114 if(!(xw.state & WIN_FOCUSED))
2115 xseturgency(1);
2116 return;
2117 case '\033': /* ESC */
2118 csireset();
2119 term.esc = ESC_START;
2120 return;
2121 case '\016': /* SO */
2122 case '\017': /* SI */
2123 /*
2124 * Different charsets are hard to handle. Applications
2125 * should use the right alt charset escapes for the
2126 * only reason they still exist: line drawing. The
2127 * rest is incompatible history st should not support.
2128 */
2129 return;
2130 case '\032': /* SUB */
2131 case '\030': /* CAN */
2132 csireset();
2133 return;
2134 case '\005': /* ENQ (IGNORED) */
2135 case '\000': /* NUL (IGNORED) */
2136 case '\021': /* XON (IGNORED) */
2137 case '\023': /* XOFF (IGNORED) */
2138 case 0177: /* DEL (IGNORED) */
2139 return;
2140 }
2141 } else if(term.esc & ESC_START) {
2142 if(term.esc & ESC_CSI) {
2143 csiescseq.buf[csiescseq.len++] = ascii;
2144 if(BETWEEN(ascii, 0x40, 0x7E)
2145 || csiescseq.len >= \
2146 sizeof(csiescseq.buf)-1) {
2147 term.esc = 0;
2148 csiparse();
2149 csihandle();
2150 }
2151 } else if(term.esc & ESC_STR_END) {
2152 term.esc = 0;
2153 if(ascii == '\\')
2154 strhandle();
2155 } else if(term.esc & ESC_ALTCHARSET) {
2156 switch(ascii) {
2157 case '0': /* Line drawing set */
2158 term.c.attr.mode |= ATTR_GFX;
2159 break;
2160 case 'B': /* USASCII */
2161 term.c.attr.mode &= ~ATTR_GFX;
2162 break;
2163 case 'A': /* UK (IGNORED) */
2164 case '<': /* multinational charset (IGNORED) */
2165 case '5': /* Finnish (IGNORED) */
2166 case 'C': /* Finnish (IGNORED) */
2167 case 'K': /* German (IGNORED) */
2168 break;
2169 default:
2170 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2171 }
2172 term.esc = 0;
2173 } else if(term.esc & ESC_TEST) {
2174 if(ascii == '8') { /* DEC screen alignment test. */
2175 char E[UTF_SIZ] = "E";
2176 int x, y;
2177
2178 for(x = 0; x < term.col; ++x) {
2179 for(y = 0; y < term.row; ++y)
2180 tsetchar(E, &term.c.attr, x, y);
2181 }
2182 }
2183 term.esc = 0;
2184 } else {
2185 switch(ascii) {
2186 case '[':
2187 term.esc |= ESC_CSI;
2188 break;
2189 case '#':
2190 term.esc |= ESC_TEST;
2191 break;
2192 case 'P': /* DCS -- Device Control String */
2193 case '_': /* APC -- Application Program Command */
2194 case '^': /* PM -- Privacy Message */
2195 case ']': /* OSC -- Operating System Command */
2196 case 'k': /* old title set compatibility */
2197 strreset();
2198 strescseq.type = ascii;
2199 term.esc |= ESC_STR;
2200 break;
2201 case '(': /* set primary charset G0 */
2202 term.esc |= ESC_ALTCHARSET;
2203 break;
2204 case ')': /* set secondary charset G1 (IGNORED) */
2205 case '*': /* set tertiary charset G2 (IGNORED) */
2206 case '+': /* set quaternary charset G3 (IGNORED) */
2207 term.esc = 0;
2208 break;
2209 case 'D': /* IND -- Linefeed */
2210 if(term.c.y == term.bot) {
2211 tscrollup(term.top, 1);
2212 } else {
2213 tmoveto(term.c.x, term.c.y+1);
2214 }
2215 term.esc = 0;
2216 break;
2217 case 'E': /* NEL -- Next line */
2218 tnewline(1); /* always go to first col */
2219 term.esc = 0;
2220 break;
2221 case 'H': /* HTS -- Horizontal tab stop */
2222 term.tabs[term.c.x] = 1;
2223 term.esc = 0;
2224 break;
2225 case 'M': /* RI -- Reverse index */
2226 if(term.c.y == term.top) {
2227 tscrolldown(term.top, 1);
2228 } else {
2229 tmoveto(term.c.x, term.c.y-1);
2230 }
2231 term.esc = 0;
2232 break;
2233 case 'Z': /* DECID -- Identify Terminal */
2234 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2235 term.esc = 0;
2236 break;
2237 case 'c': /* RIS -- Reset to inital state */
2238 treset();
2239 term.esc = 0;
2240 xresettitle();
2241 break;
2242 case '=': /* DECPAM -- Application keypad */
2243 term.mode |= MODE_APPKEYPAD;
2244 term.esc = 0;
2245 break;
2246 case '>': /* DECPNM -- Normal keypad */
2247 term.mode &= ~MODE_APPKEYPAD;
2248 term.esc = 0;
2249 break;
2250 case '7': /* DECSC -- Save Cursor */
2251 tcursor(CURSOR_SAVE);
2252 term.esc = 0;
2253 break;
2254 case '8': /* DECRC -- Restore Cursor */
2255 tcursor(CURSOR_LOAD);
2256 term.esc = 0;
2257 break;
2258 case '\\': /* ST -- Stop */
2259 term.esc = 0;
2260 break;
2261 default:
2262 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2263 (uchar) ascii, isprint(ascii)? ascii:'.');
2264 term.esc = 0;
2265 }
2266 }
2267 /*
2268 * All characters which form part of a sequence are not
2269 * printed
2270 */
2271 return;
2272 }
2273 /*
2274 * Display control codes only if we are in graphic mode
2275 */
2276 if(control && !(term.c.attr.mode & ATTR_GFX))
2277 return;
2278 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2279 sel.bx = -1;
2280 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2281 term.line[term.c.y][term.c.x].mode |= ATTR_WRAP;
2282 tnewline(1);
2283 }
2284
2285 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2286 memmove(&term.line[term.c.y][term.c.x+1],
2287 &term.line[term.c.y][term.c.x],
2288 (term.col - term.c.x - 1) * sizeof(Glyph));
2289 }
2290
2291 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2292 if(term.c.x+1 < term.col) {
2293 tmoveto(term.c.x+1, term.c.y);
2294 } else {
2295 term.c.state |= CURSOR_WRAPNEXT;
2296 }
2297 }
2298
2299 int
2300 tresize(int col, int row) {
2301 int i;
2302 int minrow = MIN(row, term.row);
2303 int mincol = MIN(col, term.col);
2304 int slide = term.c.y - row + 1;
2305 bool *bp;
2306 Line *orig;
2307
2308 if(col < 1 || row < 1)
2309 return 0;
2310
2311 /* free unneeded rows */
2312 i = 0;
2313 if(slide > 0) {
2314 /*
2315 * slide screen to keep cursor where we expect it -
2316 * tscrollup would work here, but we can optimize to
2317 * memmove because we're freeing the earlier lines
2318 */
2319 for(/* i = 0 */; i < slide; i++) {
2320 free(term.line[i]);
2321 free(term.alt[i]);
2322 }
2323 memmove(term.line, term.line + slide, row * sizeof(Line));
2324 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2325 }
2326 for(i += row; i < term.row; i++) {
2327 free(term.line[i]);
2328 free(term.alt[i]);
2329 }
2330
2331 /* resize to new height */
2332 term.line = xrealloc(term.line, row * sizeof(Line));
2333 term.alt = xrealloc(term.alt, row * sizeof(Line));
2334 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2335 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2336
2337 /* resize each row to new width, zero-pad if needed */
2338 for(i = 0; i < minrow; i++) {
2339 term.dirty[i] = 1;
2340 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2341 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2342 }
2343
2344 /* allocate any new rows */
2345 for(/* i == minrow */; i < row; i++) {
2346 term.dirty[i] = 1;
2347 term.line[i] = xcalloc(col, sizeof(Glyph));
2348 term.alt [i] = xcalloc(col, sizeof(Glyph));
2349 }
2350 if(col > term.col) {
2351 bp = term.tabs + term.col;
2352
2353 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2354 while(--bp > term.tabs && !*bp)
2355 /* nothing */ ;
2356 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2357 *bp = 1;
2358 }
2359 /* update terminal size */
2360 term.col = col;
2361 term.row = row;
2362 /* reset scrolling region */
2363 tsetscroll(0, row-1);
2364 /* make use of the LIMIT in tmoveto */
2365 tmoveto(term.c.x, term.c.y);
2366 /* Clearing both screens */
2367 orig = term.line;
2368 do {
2369 if(mincol < col && 0 < minrow) {
2370 tclearregion(mincol, 0, col - 1, minrow - 1);
2371 }
2372 if(0 < col && minrow < row) {
2373 tclearregion(0, minrow, col - 1, row - 1);
2374 }
2375 tswapscreen();
2376 } while(orig != term.line);
2377
2378 return (slide > 0);
2379 }
2380
2381 void
2382 xresize(int col, int row) {
2383 xw.tw = MAX(1, col * xw.cw);
2384 xw.th = MAX(1, row * xw.ch);
2385
2386 XFreePixmap(xw.dpy, xw.buf);
2387 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2388 DefaultDepth(xw.dpy, xw.scr));
2389 XftDrawChange(xw.draw, xw.buf);
2390 xclear(0, 0, xw.w, xw.h);
2391 }
2392
2393 static inline ushort
2394 sixd_to_16bit(int x) {
2395 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2396 }
2397
2398 void
2399 xloadcols(void) {
2400 int i, r, g, b;
2401 XRenderColor color = { .alpha = 0xffff };
2402
2403 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2404 for(i = 0; i < LEN(colorname); i++) {
2405 if(!colorname[i])
2406 continue;
2407 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2408 die("Could not allocate color '%s'\n", colorname[i]);
2409 }
2410 }
2411
2412 /* load colors [16-255] ; same colors as xterm */
2413 for(i = 16, r = 0; r < 6; r++) {
2414 for(g = 0; g < 6; g++) {
2415 for(b = 0; b < 6; b++) {
2416 color.red = sixd_to_16bit(r);
2417 color.green = sixd_to_16bit(g);
2418 color.blue = sixd_to_16bit(b);
2419 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2420 die("Could not allocate color %d\n", i);
2421 }
2422 i++;
2423 }
2424 }
2425 }
2426
2427 for(r = 0; r < 24; r++, i++) {
2428 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2429 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2430 &dc.col[i])) {
2431 die("Could not allocate color %d\n", i);
2432 }
2433 }
2434 }
2435
2436 int
2437 xsetcolorname(int x, const char *name) {
2438 XRenderColor color = { .alpha = 0xffff };
2439 Colour colour;
2440 if (x < 0 || x > LEN(colorname))
2441 return -1;
2442 if(!name) {
2443 if(16 <= x && x < 16 + 216) {
2444 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2445 color.red = sixd_to_16bit(r);
2446 color.green = sixd_to_16bit(g);
2447 color.blue = sixd_to_16bit(b);
2448 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2449 return 0; /* something went wrong */
2450 dc.col[x] = colour;
2451 return 1;
2452 } else if (16 + 216 <= x && x < 256) {
2453 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2454 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2455 return 0; /* something went wrong */
2456 dc.col[x] = colour;
2457 return 1;
2458 } else {
2459 name = colorname[x];
2460 }
2461 }
2462 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2463 return 0;
2464 dc.col[x] = colour;
2465 return 1;
2466 }
2467
2468 void
2469 xtermclear(int col1, int row1, int col2, int row2) {
2470 XftDrawRect(xw.draw,
2471 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2472 borderpx + col1 * xw.cw,
2473 borderpx + row1 * xw.ch,
2474 (col2-col1+1) * xw.cw,
2475 (row2-row1+1) * xw.ch);
2476 }
2477
2478 /*
2479 * Absolute coordinates.
2480 */
2481 void
2482 xclear(int x1, int y1, int x2, int y2) {
2483 XftDrawRect(xw.draw,
2484 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2485 x1, y1, x2-x1, y2-y1);
2486 }
2487
2488 void
2489 xhints(void) {
2490 XClassHint class = {opt_class ? opt_class : termname, termname};
2491 XWMHints wm = {.flags = InputHint, .input = 1};
2492 XSizeHints *sizeh = NULL;
2493
2494 sizeh = XAllocSizeHints();
2495 if(xw.isfixed == False) {
2496 sizeh->flags = PSize | PResizeInc | PBaseSize;
2497 sizeh->height = xw.h;
2498 sizeh->width = xw.w;
2499 sizeh->height_inc = xw.ch;
2500 sizeh->width_inc = xw.cw;
2501 sizeh->base_height = 2 * borderpx;
2502 sizeh->base_width = 2 * borderpx;
2503 } else {
2504 sizeh->flags = PMaxSize | PMinSize;
2505 sizeh->min_width = sizeh->max_width = xw.fw;
2506 sizeh->min_height = sizeh->max_height = xw.fh;
2507 }
2508
2509 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2510 XFree(sizeh);
2511 }
2512
2513 int
2514 xloadfont(Font *f, FcPattern *pattern) {
2515 FcPattern *match;
2516 FcResult result;
2517
2518 match = FcFontMatch(NULL, pattern, &result);
2519 if(!match)
2520 return 1;
2521
2522 if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
2523 FcPatternDestroy(match);
2524 return 1;
2525 }
2526
2527 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2528 FcPatternDestroy(match);
2529 return 1;
2530 }
2531
2532 f->pattern = FcPatternDuplicate(pattern);
2533
2534 f->ascent = f->match->ascent;
2535 f->descent = f->match->descent;
2536 f->lbearing = 0;
2537 f->rbearing = f->match->max_advance_width;
2538
2539 f->height = f->ascent + f->descent;
2540 f->width = f->lbearing + f->rbearing;
2541
2542 return 0;
2543 }
2544
2545 void
2546 xloadfonts(char *fontstr, int fontsize) {
2547 FcPattern *pattern;
2548 FcResult result;
2549 double fontval;
2550
2551 if(fontstr[0] == '-') {
2552 pattern = XftXlfdParse(fontstr, False, False);
2553 } else {
2554 pattern = FcNameParse((FcChar8 *)fontstr);
2555 }
2556
2557 if(!pattern)
2558 die("st: can't open font %s\n", fontstr);
2559
2560 if(fontsize > 0) {
2561 FcPatternDel(pattern, FC_PIXEL_SIZE);
2562 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2563 usedfontsize = fontsize;
2564 } else {
2565 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2566 if(result == FcResultMatch) {
2567 usedfontsize = (int)fontval;
2568 } else {
2569 /*
2570 * Default font size is 12, if none given. This is to
2571 * have a known usedfontsize value.
2572 */
2573 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2574 usedfontsize = 12;
2575 }
2576 }
2577
2578 FcConfigSubstitute(0, pattern, FcMatchPattern);
2579 FcDefaultSubstitute(pattern);
2580
2581 if(xloadfont(&dc.font, pattern))
2582 die("st: can't open font %s\n", fontstr);
2583
2584 /* Setting character width and height. */
2585 xw.cw = dc.font.width;
2586 xw.ch = dc.font.height;
2587
2588 FcPatternDel(pattern, FC_SLANT);
2589 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2590 if(xloadfont(&dc.ifont, pattern))
2591 die("st: can't open font %s\n", fontstr);
2592
2593 FcPatternDel(pattern, FC_WEIGHT);
2594 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2595 if(xloadfont(&dc.ibfont, pattern))
2596 die("st: can't open font %s\n", fontstr);
2597
2598 FcPatternDel(pattern, FC_SLANT);
2599 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2600 if(xloadfont(&dc.bfont, pattern))
2601 die("st: can't open font %s\n", fontstr);
2602
2603 FcPatternDestroy(pattern);
2604 }
2605
2606 void
2607 xunloadfonts(void) {
2608 int i, ip;
2609
2610 /*
2611 * Free the loaded fonts in the font cache. This is done backwards
2612 * from the frccur.
2613 */
2614 for(i = 0, ip = frccur; i < frclen; i++, ip--) {
2615 if(ip < 0)
2616 ip = LEN(frc) - 1;
2617 XftFontClose(xw.dpy, frc[ip].font);
2618 }
2619 frccur = -1;
2620 frclen = 0;
2621
2622 XftFontClose(xw.dpy, dc.font.match);
2623 FcPatternDestroy(dc.font.pattern);
2624 FcFontSetDestroy(dc.font.set);
2625 XftFontClose(xw.dpy, dc.bfont.match);
2626 FcPatternDestroy(dc.bfont.pattern);
2627 FcFontSetDestroy(dc.bfont.set);
2628 XftFontClose(xw.dpy, dc.ifont.match);
2629 FcPatternDestroy(dc.ifont.pattern);
2630 FcFontSetDestroy(dc.ifont.set);
2631 XftFontClose(xw.dpy, dc.ibfont.match);
2632 FcPatternDestroy(dc.ibfont.pattern);
2633 FcFontSetDestroy(dc.ibfont.set);
2634 }
2635
2636 void
2637 xzoom(const Arg *arg) {
2638 xunloadfonts();
2639 xloadfonts(usedfont, usedfontsize + arg->i);
2640 cresize(0, 0);
2641 redraw(0);
2642 }
2643
2644 void
2645 xinit(void) {
2646 XSetWindowAttributes attrs;
2647 XGCValues gcvalues;
2648 Cursor cursor;
2649 Window parent;
2650 int sw, sh;
2651
2652 if(!(xw.dpy = XOpenDisplay(NULL)))
2653 die("Can't open display\n");
2654 xw.scr = XDefaultScreen(xw.dpy);
2655 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2656
2657 /* font */
2658 if(!FcInit())
2659 die("Could not init fontconfig.\n");
2660
2661 usedfont = (opt_font == NULL)? font : opt_font;
2662 xloadfonts(usedfont, 0);
2663
2664 /* colors */
2665 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2666 xloadcols();
2667
2668 /* adjust fixed window geometry */
2669 if(xw.isfixed) {
2670 sw = DisplayWidth(xw.dpy, xw.scr);
2671 sh = DisplayHeight(xw.dpy, xw.scr);
2672 if(xw.fx < 0)
2673 xw.fx = sw + xw.fx - xw.fw - 1;
2674 if(xw.fy < 0)
2675 xw.fy = sh + xw.fy - xw.fh - 1;
2676
2677 xw.h = xw.fh;
2678 xw.w = xw.fw;
2679 } else {
2680 /* window - default size */
2681 xw.h = 2 * borderpx + term.row * xw.ch;
2682 xw.w = 2 * borderpx + term.col * xw.cw;
2683 xw.fx = 0;
2684 xw.fy = 0;
2685 }
2686
2687 /* Events */
2688 attrs.background_pixel = dc.col[defaultbg].pixel;
2689 attrs.border_pixel = dc.col[defaultbg].pixel;
2690 attrs.bit_gravity = NorthWestGravity;
2691 attrs.event_mask = FocusChangeMask | KeyPressMask
2692 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2693 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2694 attrs.colormap = xw.cmap;
2695
2696 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2697 XRootWindow(xw.dpy, xw.scr);
2698 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2699 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2700 xw.vis,
2701 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2702 | CWColormap,
2703 &attrs);
2704
2705 memset(&gcvalues, 0, sizeof(gcvalues));
2706 gcvalues.graphics_exposures = False;
2707 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2708 &gcvalues);
2709 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2710 DefaultDepth(xw.dpy, xw.scr));
2711 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2712 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2713
2714 /* Xft rendering context */
2715 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2716
2717 /* input methods */
2718 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2719 XSetLocaleModifiers("@im=local");
2720 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2721 XSetLocaleModifiers("@im=");
2722 if((xw.xim = XOpenIM(xw.dpy,
2723 NULL, NULL, NULL)) == NULL) {
2724 die("XOpenIM failed. Could not open input"
2725 " device.\n");
2726 }
2727 }
2728 }
2729 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2730 | XIMStatusNothing, XNClientWindow, xw.win,
2731 XNFocusWindow, xw.win, NULL);
2732 if(xw.xic == NULL)
2733 die("XCreateIC failed. Could not obtain input method.\n");
2734
2735 /* white cursor, black outline */
2736 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2737 XDefineCursor(xw.dpy, xw.win, cursor);
2738 XRecolorCursor(xw.dpy, cursor,
2739 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2740 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2741
2742 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2743 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2744 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2745
2746 xresettitle();
2747 XMapWindow(xw.dpy, xw.win);
2748 xhints();
2749 XSync(xw.dpy, 0);
2750 }
2751
2752 void
2753 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2754 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2755 width = charlen * xw.cw, xp, i;
2756 int frp, frcflags;
2757 int u8fl, u8fblen, u8cblen, doesexist;
2758 char *u8c, *u8fs;
2759 long u8char;
2760 Font *font = &dc.font;
2761 FcResult fcres;
2762 FcPattern *fcpattern, *fontpattern;
2763 FcFontSet *fcsets[] = { NULL };
2764 FcCharSet *fccharset;
2765 Colour *fg, *bg, *temp, revfg, revbg;
2766 XRenderColor colfg, colbg;
2767
2768 frcflags = FRC_NORMAL;
2769
2770 if(base.mode & ATTR_ITALIC) {
2771 if(base.fg == defaultfg)
2772 base.fg = defaultitalic;
2773 font = &dc.ifont;
2774 frcflags = FRC_ITALIC;
2775 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2776 if(base.fg == defaultfg)
2777 base.fg = defaultitalic;
2778 font = &dc.ibfont;
2779 frcflags = FRC_ITALICBOLD;
2780 } else if(base.mode & ATTR_UNDERLINE) {
2781 if(base.fg == defaultfg)
2782 base.fg = defaultunderline;
2783 }
2784 fg = &dc.col[base.fg];
2785 bg = &dc.col[base.bg];
2786
2787 if(base.mode & ATTR_BOLD) {
2788 if(BETWEEN(base.fg, 0, 7)) {
2789 /* basic system colors */
2790 fg = &dc.col[base.fg + 8];
2791 } else if(BETWEEN(base.fg, 16, 195)) {
2792 /* 256 colors */
2793 fg = &dc.col[base.fg + 36];
2794 } else if(BETWEEN(base.fg, 232, 251)) {
2795 /* greyscale */
2796 fg = &dc.col[base.fg + 4];
2797 }
2798 /*
2799 * Those ranges will not be brightened:
2800 * 8 - 15 – bright system colors
2801 * 196 - 231 – highest 256 color cube
2802 * 252 - 255 – brightest colors in greyscale
2803 */
2804 font = &dc.bfont;
2805 frcflags = FRC_BOLD;
2806 }
2807
2808 if(IS_SET(MODE_REVERSE)) {
2809 if(fg == &dc.col[defaultfg]) {
2810 fg = &dc.col[defaultbg];
2811 } else {
2812 colfg.red = ~fg->color.red;
2813 colfg.green = ~fg->color.green;
2814 colfg.blue = ~fg->color.blue;
2815 colfg.alpha = fg->color.alpha;
2816 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2817 fg = &revfg;
2818 }
2819
2820 if(bg == &dc.col[defaultbg]) {
2821 bg = &dc.col[defaultfg];
2822 } else {
2823 colbg.red = ~bg->color.red;
2824 colbg.green = ~bg->color.green;
2825 colbg.blue = ~bg->color.blue;
2826 colbg.alpha = bg->color.alpha;
2827 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2828 bg = &revbg;
2829 }
2830 }
2831
2832 if(base.mode & ATTR_REVERSE) {
2833 temp = fg;
2834 fg = bg;
2835 bg = temp;
2836 }
2837
2838 /* Intelligent cleaning up of the borders. */
2839 if(x == 0) {
2840 xclear(0, (y == 0)? 0 : winy, borderpx,
2841 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2842 }
2843 if(x + charlen >= term.col) {
2844 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2845 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2846 }
2847 if(y == 0)
2848 xclear(winx, 0, winx + width, borderpx);
2849 if(y == term.row-1)
2850 xclear(winx, winy + xw.ch, winx + width, xw.h);
2851
2852 /* Clean up the region we want to draw to. */
2853 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2854
2855 fcsets[0] = font->set;
2856 for(xp = winx; bytelen > 0;) {
2857 /*
2858 * Search for the range in the to be printed string of glyphs
2859 * that are in the main font. Then print that range. If
2860 * some glyph is found that is not in the font, do the
2861 * fallback dance.
2862 */
2863 u8fs = s;
2864 u8fblen = 0;
2865 u8fl = 0;
2866 for(;;) {
2867 u8c = s;
2868 u8cblen = utf8decode(s, &u8char);
2869 s += u8cblen;
2870 bytelen -= u8cblen;
2871
2872 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
2873 if(!doesexist || bytelen <= 0) {
2874 if(bytelen <= 0) {
2875 if(doesexist) {
2876 u8fl++;
2877 u8fblen += u8cblen;
2878 }
2879 }
2880
2881 if(u8fl > 0) {
2882 XftDrawStringUtf8(xw.draw, fg,
2883 font->match, xp,
2884 winy + font->ascent,
2885 (FcChar8 *)u8fs,
2886 u8fblen);
2887 xp += font->width * u8fl;
2888 }
2889 break;
2890 }
2891
2892 u8fl++;
2893 u8fblen += u8cblen;
2894 }
2895 if(doesexist)
2896 break;
2897
2898 frp = frccur;
2899 /* Search the font cache. */
2900 for(i = 0; i < frclen; i++, frp--) {
2901 if(frp <= 0)
2902 frp = LEN(frc) - 1;
2903
2904 if(frc[frp].c == u8char
2905 && frc[frp].flags == frcflags) {
2906 break;
2907 }
2908 }
2909
2910 /* Nothing was found. */
2911 if(i >= frclen) {
2912 /*
2913 * Nothing was found in the cache. Now use
2914 * some dozen of Fontconfig calls to get the
2915 * font for one single character.
2916 */
2917 fcpattern = FcPatternDuplicate(font->pattern);
2918 fccharset = FcCharSetCreate();
2919
2920 FcCharSetAddChar(fccharset, u8char);
2921 FcPatternAddCharSet(fcpattern, FC_CHARSET,
2922 fccharset);
2923 FcPatternAddBool(fcpattern, FC_SCALABLE,
2924 FcTrue);
2925
2926 FcConfigSubstitute(0, fcpattern,
2927 FcMatchPattern);
2928 FcDefaultSubstitute(fcpattern);
2929
2930 fontpattern = FcFontSetMatch(0, fcsets,
2931 FcTrue, fcpattern, &fcres);
2932
2933 /*
2934 * Overwrite or create the new cache entry.
2935 */
2936 frccur++;
2937 frclen++;
2938 if(frccur >= LEN(frc))
2939 frccur = 0;
2940 if(frclen > LEN(frc)) {
2941 frclen = LEN(frc);
2942 XftFontClose(xw.dpy, frc[frccur].font);
2943 }
2944
2945 frc[frccur].font = XftFontOpenPattern(xw.dpy,
2946 fontpattern);
2947 frc[frccur].c = u8char;
2948 frc[frccur].flags = frcflags;
2949
2950 FcPatternDestroy(fcpattern);
2951 FcCharSetDestroy(fccharset);
2952
2953 frp = frccur;
2954 }
2955
2956 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
2957 xp, winy + frc[frp].font->ascent,
2958 (FcChar8 *)u8c, u8cblen);
2959
2960 xp += font->width;
2961 }
2962
2963 /*
2964 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
2965 winy + font->ascent, (FcChar8 *)s, bytelen);
2966 */
2967
2968 if(base.mode & ATTR_UNDERLINE) {
2969 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
2970 width, 1);
2971 }
2972 }
2973
2974 void
2975 xdrawcursor(void) {
2976 static int oldx = 0, oldy = 0;
2977 int sl;
2978 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
2979
2980 LIMIT(oldx, 0, term.col-1);
2981 LIMIT(oldy, 0, term.row-1);
2982
2983 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2984
2985 /* remove the old cursor */
2986 sl = utf8size(term.line[oldy][oldx].c);
2987 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2988 oldy, 1, sl);
2989
2990 /* draw the new one */
2991 if(!(IS_SET(MODE_HIDE))) {
2992 if(xw.state & WIN_FOCUSED) {
2993 if(IS_SET(MODE_REVERSE)) {
2994 g.mode |= ATTR_REVERSE;
2995 g.fg = defaultcs;
2996 g.bg = defaultfg;
2997 }
2998
2999 sl = utf8size(g.c);
3000 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
3001 } else {
3002 XftDrawRect(xw.draw, &dc.col[defaultcs],
3003 borderpx + term.c.x * xw.cw,
3004 borderpx + term.c.y * xw.ch,
3005 xw.cw - 1, 1);
3006 XftDrawRect(xw.draw, &dc.col[defaultcs],
3007 borderpx + term.c.x * xw.cw,
3008 borderpx + term.c.y * xw.ch,
3009 1, xw.ch - 1);
3010 XftDrawRect(xw.draw, &dc.col[defaultcs],
3011 borderpx + (term.c.x + 1) * xw.cw - 1,
3012 borderpx + term.c.y * xw.ch,
3013 1, xw.ch - 1);
3014 XftDrawRect(xw.draw, &dc.col[defaultcs],
3015 borderpx + term.c.x * xw.cw,
3016 borderpx + (term.c.y + 1) * xw.ch - 1,
3017 xw.cw, 1);
3018 }
3019 oldx = term.c.x, oldy = term.c.y;
3020 }
3021 }
3022
3023
3024 void
3025 xsettitle(char *p) {
3026 XTextProperty prop;
3027
3028 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3029 &prop);
3030 XSetWMName(xw.dpy, xw.win, &prop);
3031 }
3032
3033 void
3034 xresettitle(void) {
3035 xsettitle(opt_title ? opt_title : "st");
3036 }
3037
3038 void
3039 redraw(int timeout) {
3040 struct timespec tv = {0, timeout * 1000};
3041
3042 tfulldirt();
3043 draw();
3044
3045 if(timeout > 0) {
3046 nanosleep(&tv, NULL);
3047 XSync(xw.dpy, False); /* necessary for a good tput flash */
3048 }
3049 }
3050
3051 void
3052 draw(void) {
3053 drawregion(0, 0, term.col, term.row);
3054 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3055 xw.h, 0, 0);
3056 XSetForeground(xw.dpy, dc.gc,
3057 dc.col[IS_SET(MODE_REVERSE)?
3058 defaultfg : defaultbg].pixel);
3059 }
3060
3061 void
3062 drawregion(int x1, int y1, int x2, int y2) {
3063 int ic, ib, x, y, ox, sl;
3064 Glyph base, new;
3065 char buf[DRAW_BUF_SIZ];
3066 bool ena_sel = sel.bx != -1;
3067
3068 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3069 ena_sel = 0;
3070
3071 if(!(xw.state & WIN_VISIBLE))
3072 return;
3073
3074 for(y = y1; y < y2; y++) {
3075 if(!term.dirty[y])
3076 continue;
3077
3078 xtermclear(0, y, term.col, y);
3079 term.dirty[y] = 0;
3080 base = term.line[y][0];
3081 ic = ib = ox = 0;
3082 for(x = x1; x < x2; x++) {
3083 new = term.line[y][x];
3084 if(ena_sel && *(new.c) && selected(x, y))
3085 new.mode ^= ATTR_REVERSE;
3086 if(ib > 0 && (ATTRCMP(base, new)
3087 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3088 xdraws(buf, base, ox, y, ic, ib);
3089 ic = ib = 0;
3090 }
3091 if(ib == 0) {
3092 ox = x;
3093 base = new;
3094 }
3095
3096 sl = utf8size(new.c);
3097 memcpy(buf+ib, new.c, sl);
3098 ib += sl;
3099 ++ic;
3100 }
3101 if(ib > 0)
3102 xdraws(buf, base, ox, y, ic, ib);
3103 }
3104 xdrawcursor();
3105 }
3106
3107 void
3108 expose(XEvent *ev) {
3109 XExposeEvent *e = &ev->xexpose;
3110
3111 if(xw.state & WIN_REDRAW) {
3112 if(!e->count)
3113 xw.state &= ~WIN_REDRAW;
3114 }
3115 redraw(0);
3116 }
3117
3118 void
3119 visibility(XEvent *ev) {
3120 XVisibilityEvent *e = &ev->xvisibility;
3121
3122 if(e->state == VisibilityFullyObscured) {
3123 xw.state &= ~WIN_VISIBLE;
3124 } else if(!(xw.state & WIN_VISIBLE)) {
3125 /* need a full redraw for next Expose, not just a buf copy */
3126 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3127 }
3128 }
3129
3130 void
3131 unmap(XEvent *ev) {
3132 xw.state &= ~WIN_VISIBLE;
3133 }
3134
3135 void
3136 xseturgency(int add) {
3137 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3138
3139 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3140 XSetWMHints(xw.dpy, xw.win, h);
3141 XFree(h);
3142 }
3143
3144 void
3145 focus(XEvent *ev) {
3146 XFocusChangeEvent *e = &ev->xfocus;
3147
3148 if(e->mode == NotifyGrab)
3149 return;
3150
3151 if(ev->type == FocusIn) {
3152 XSetICFocus(xw.xic);
3153 xw.state |= WIN_FOCUSED;
3154 xseturgency(0);
3155 } else {
3156 XUnsetICFocus(xw.xic);
3157 xw.state &= ~WIN_FOCUSED;
3158 }
3159 }
3160
3161 inline bool
3162 match(uint mask, uint state) {
3163 state &= ~(ignoremod);
3164
3165 if(mask == XK_NO_MOD && state)
3166 return false;
3167 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3168 return false;
3169 if((state & mask) != state)
3170 return false;
3171 return true;
3172 }
3173
3174 void
3175 numlock(const Arg *dummy) {
3176 term.numlock ^= 1;
3177 }
3178
3179 char*
3180 kmap(KeySym k, uint state) {
3181 uint mask;
3182 Key *kp;
3183 int i;
3184
3185 /* Check for mapped keys out of X11 function keys. */
3186 for(i = 0; i < LEN(mappedkeys); i++) {
3187 if(mappedkeys[i] == k)
3188 break;
3189 }
3190 if(i == LEN(mappedkeys)) {
3191 if((k & 0xFFFF) < 0xFD00)
3192 return NULL;
3193 }
3194
3195 for(kp = key; kp < key + LEN(key); kp++) {
3196 mask = kp->mask;
3197
3198 if(kp->k != k)
3199 continue;
3200
3201 if(!match(mask, state))
3202 continue;
3203
3204 if(kp->appkey > 0) {
3205 if(!IS_SET(MODE_APPKEYPAD))
3206 continue;
3207 if(term.numlock && kp->appkey == 2)
3208 continue;
3209 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3210 continue;
3211 }
3212
3213 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3214 (kp->appcursor > 0
3215 && !IS_SET(MODE_APPCURSOR))) {
3216 continue;
3217 }
3218
3219 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3220 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3221 continue;
3222 }
3223
3224 return kp->s;
3225 }
3226
3227 return NULL;
3228 }
3229
3230 void
3231 kpress(XEvent *ev) {
3232 XKeyEvent *e = &ev->xkey;
3233 KeySym ksym;
3234 char xstr[31], buf[32], *customkey, *cp = buf;
3235 int len, ret;
3236 long c;
3237 Status status;
3238 Shortcut *bp;
3239
3240 if(IS_SET(MODE_KBDLOCK))
3241 return;
3242
3243 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3244 e->state &= ~Mod2Mask;
3245 /* 1. shortcuts */
3246 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3247 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3248 bp->func(&(bp->arg));
3249 return;
3250 }
3251 }
3252
3253 /* 2. custom keys from config.h */
3254 if((customkey = kmap(ksym, e->state))) {
3255 len = strlen(customkey);
3256 memcpy(buf, customkey, len);
3257 /* 3. hardcoded (overrides X lookup) */
3258 } else {
3259 if(len == 0)
3260 return;
3261
3262 if(len == 1 && e->state & Mod1Mask) {
3263 if(IS_SET(MODE_8BIT)) {
3264 if(*xstr < 0177) {
3265 c = *xstr | B7;
3266 ret = utf8encode(&c, cp);
3267 cp += ret;
3268 len = 0;
3269 }
3270 } else {
3271 *cp++ = '\033';
3272 }
3273 }
3274
3275 memcpy(cp, xstr, len);
3276 len = cp - buf + len;
3277 }
3278
3279 ttywrite(buf, len);
3280 if(IS_SET(MODE_ECHO))
3281 techo(buf, len);
3282 }
3283
3284
3285 void
3286 cmessage(XEvent *e) {
3287 /*
3288 * See xembed specs
3289 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3290 */
3291 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3292 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3293 xw.state |= WIN_FOCUSED;
3294 xseturgency(0);
3295 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3296 xw.state &= ~WIN_FOCUSED;
3297 }
3298 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3299 /* Send SIGHUP to shell */
3300 kill(pid, SIGHUP);
3301 exit(EXIT_SUCCESS);
3302 }
3303 }
3304
3305 void
3306 cresize(int width, int height) {
3307 int col, row;
3308
3309 if(width != 0)
3310 xw.w = width;
3311 if(height != 0)
3312 xw.h = height;
3313
3314 col = (xw.w - 2 * borderpx) / xw.cw;
3315 row = (xw.h - 2 * borderpx) / xw.ch;
3316
3317 tresize(col, row);
3318 xresize(col, row);
3319 ttyresize();
3320 }
3321
3322 void
3323 resize(XEvent *e) {
3324 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3325 return;
3326
3327 cresize(e->xconfigure.width, e->xconfigure.height);
3328 }
3329
3330 void
3331 run(void) {
3332 XEvent ev;
3333 fd_set rfd;
3334 int xfd = XConnectionNumber(xw.dpy), xev;
3335 struct timeval drawtimeout, *tv = NULL, now, last;
3336
3337 gettimeofday(&last, NULL);
3338
3339 for(xev = actionfps;;) {
3340 FD_ZERO(&rfd);
3341 FD_SET(cmdfd, &rfd);
3342 FD_SET(xfd, &rfd);
3343 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3344 if(errno == EINTR)
3345 continue;
3346 die("select failed: %s\n", SERRNO);
3347 }
3348
3349 gettimeofday(&now, NULL);
3350 drawtimeout.tv_sec = 0;
3351 drawtimeout.tv_usec = (1000/xfps) * 1000;
3352 tv = &drawtimeout;
3353
3354 if(FD_ISSET(cmdfd, &rfd))
3355 ttyread();
3356
3357 if(FD_ISSET(xfd, &rfd))
3358 xev = actionfps;
3359
3360 if(TIMEDIFF(now, last) > \
3361 (xev ? (1000/xfps) : (1000/actionfps))) {
3362 while(XPending(xw.dpy)) {
3363 XNextEvent(xw.dpy, &ev);
3364 if(XFilterEvent(&ev, None))
3365 continue;
3366 if(handler[ev.type])
3367 (handler[ev.type])(&ev);
3368 }
3369
3370 draw();
3371 XFlush(xw.dpy);
3372 last = now;
3373
3374 if(xev && !FD_ISSET(xfd, &rfd))
3375 xev--;
3376 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd))
3377 tv = NULL;
3378 }
3379 }
3380 }
3381
3382 void
3383 usage(void) {
3384 die("%s " VERSION " (c) 2010-2013 st engineers\n" \
3385 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3386 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3387 }
3388
3389 int
3390 main(int argc, char *argv[]) {
3391 int bitm, xr, yr;
3392 uint wr, hr;
3393
3394 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3395 xw.isfixed = False;
3396
3397 ARGBEGIN {
3398 case 'a':
3399 allowaltscreen = false;
3400 break;
3401 case 'c':
3402 opt_class = EARGF(usage());
3403 break;
3404 case 'e':
3405 /* eat all remaining arguments */
3406 if(argc > 1)
3407 opt_cmd = &argv[1];
3408 goto run;
3409 case 'f':
3410 opt_font = EARGF(usage());
3411 break;
3412 case 'g':
3413 bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
3414 if(bitm & XValue)
3415 xw.fx = xr;
3416 if(bitm & YValue)
3417 xw.fy = yr;
3418 if(bitm & WidthValue)
3419 xw.fw = (int)wr;
3420 if(bitm & HeightValue)
3421 xw.fh = (int)hr;
3422 if(bitm & XNegative && xw.fx == 0)
3423 xw.fx = -1;
3424 if(bitm & XNegative && xw.fy == 0)
3425 xw.fy = -1;
3426
3427 if(xw.fh != 0 && xw.fw != 0)
3428 xw.isfixed = True;
3429 break;
3430 case 'o':
3431 opt_io = EARGF(usage());
3432 break;
3433 case 't':
3434 opt_title = EARGF(usage());
3435 break;
3436 case 'w':
3437 opt_embed = EARGF(usage());
3438 break;
3439 case 'v':
3440 default:
3441 usage();
3442 } ARGEND;
3443
3444 run:
3445 setlocale(LC_CTYPE, "");
3446 XSetLocaleModifiers("");
3447 tnew(80, 24);
3448 xinit();
3449 ttynew();
3450 selinit();
3451 if(xw.isfixed)
3452 cresize(xw.h, xw.w);
3453 run();
3454
3455 return 0;
3456 }
3457