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Added basic xterm-ish palette swap support.
[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #define _XOPEN_SOURCE 600
3 #include <ctype.h>
4 #include <errno.h>
5 #include <fcntl.h>
6 #include <limits.h>
7 #include <locale.h>
8 #include <pwd.h>
9 #include <stdarg.h>
10 #include <stdbool.h>
11 #include <stdio.h>
12 #include <stdlib.h>
13 #include <string.h>
14 #include <signal.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <sys/stat.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <sys/wait.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <X11/Xatom.h>
24 #include <X11/Xlib.h>
25 #include <X11/Xutil.h>
26 #include <X11/cursorfont.h>
27 #include <X11/keysym.h>
28 #include <X11/extensions/Xdbe.h>
29 #include <X11/Xft/Xft.h>
30 #include <fontconfig/fontconfig.h>
31
32 #define Glyph Glyph_
33 #define Font Font_
34 #define Draw XftDraw *
35 #define Colour XftColor
36 #define Colourmap Colormap
37
38 #if defined(__linux)
39 #include <pty.h>
40 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
41 #include <util.h>
42 #elif defined(__FreeBSD__) || defined(__DragonFly__)
43 #include <libutil.h>
44 #endif
45
46 #define USAGE \
47 "st " VERSION " (c) 2010-2013 st engineers\n" \
48 "usage: st [-v] [-c class] [-f font] [-g geometry] [-o file]" \
49 " [-t title] [-w windowid] [-e command ...]\n"
50
51 /* XEMBED messages */
52 #define XEMBED_FOCUS_IN 4
53 #define XEMBED_FOCUS_OUT 5
54
55 /* Arbitrary sizes */
56 #define UTF_SIZ 4
57 #define ESC_BUF_SIZ (128*UTF_SIZ)
58 #define ESC_ARG_SIZ 16
59 #define STR_BUF_SIZ ESC_BUF_SIZ
60 #define STR_ARG_SIZ ESC_ARG_SIZ
61 #define DRAW_BUF_SIZ 20*1024
62 #define XK_ANY_MOD UINT_MAX
63 #define XK_NO_MOD 0
64 #define XK_SWITCH_MOD (1<<13)
65
66 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
67
68 /* macros */
69 #define SERRNO strerror(errno)
70 #define MIN(a, b) ((a) < (b) ? (a) : (b))
71 #define MAX(a, b) ((a) < (b) ? (b) : (a))
72 #define LEN(a) (sizeof(a) / sizeof(a[0]))
73 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
74 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
75 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
76 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
77 #define IS_SET(flag) ((term.mode & (flag)) != 0)
78 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
79
80 #define VT102ID "\033[?6c"
81
82 enum glyph_attribute {
83 ATTR_NULL = 0,
84 ATTR_REVERSE = 1,
85 ATTR_UNDERLINE = 2,
86 ATTR_BOLD = 4,
87 ATTR_GFX = 8,
88 ATTR_ITALIC = 16,
89 ATTR_BLINK = 32,
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 glyph_state {
104 GLYPH_SET = 1,
105 GLYPH_DIRTY = 2
106 };
107
108 enum term_mode {
109 MODE_WRAP = 1,
110 MODE_INSERT = 2,
111 MODE_APPKEYPAD = 4,
112 MODE_ALTSCREEN = 8,
113 MODE_CRLF = 16,
114 MODE_MOUSEBTN = 32,
115 MODE_MOUSEMOTION = 64,
116 MODE_MOUSE = 32|64,
117 MODE_REVERSE = 128,
118 MODE_KBDLOCK = 256,
119 MODE_HIDE = 512,
120 MODE_ECHO = 1024,
121 MODE_APPCURSOR = 2048,
122 MODE_MOUSESGR = 4096,
123 };
124
125 enum escape_state {
126 ESC_START = 1,
127 ESC_CSI = 2,
128 ESC_STR = 4, /* DSC, OSC, PM, APC */
129 ESC_ALTCHARSET = 8,
130 ESC_STR_END = 16, /* a final string was encountered */
131 ESC_TEST = 32, /* Enter in test mode */
132 };
133
134 enum window_state {
135 WIN_VISIBLE = 1,
136 WIN_REDRAW = 2,
137 WIN_FOCUSED = 4
138 };
139
140 enum selection_type {
141 SEL_REGULAR = 1,
142 SEL_RECTANGULAR = 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 uchar state; /* state flags */
160 } Glyph;
161
162 typedef Glyph *Line;
163
164 typedef struct {
165 Glyph attr; /* current char attributes */
166 int x;
167 int y;
168 char state;
169 } TCursor;
170
171 /* CSI Escape sequence structs */
172 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
173 typedef struct {
174 char buf[ESC_BUF_SIZ]; /* raw string */
175 int len; /* raw string length */
176 char priv;
177 int arg[ESC_ARG_SIZ];
178 int narg; /* nb of args */
179 char mode;
180 } CSIEscape;
181
182 /* STR Escape sequence structs */
183 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
184 typedef struct {
185 char type; /* ESC type ... */
186 char buf[STR_BUF_SIZ]; /* raw string */
187 int len; /* raw string length */
188 char *args[STR_ARG_SIZ];
189 int narg; /* nb of args */
190 } STREscape;
191
192 /* Internal representation of the screen */
193 typedef struct {
194 int row; /* nb row */
195 int col; /* nb col */
196 Line *line; /* screen */
197 Line *alt; /* alternate screen */
198 bool *dirty; /* dirtyness of lines */
199 TCursor c; /* cursor */
200 int top; /* top scroll limit */
201 int bot; /* bottom scroll limit */
202 int mode; /* terminal mode flags */
203 int esc; /* escape state flags */
204 bool numlock; /* lock numbers in keyboard */
205 bool *tabs;
206 } Term;
207
208 /* Purely graphic info */
209 typedef struct {
210 Display *dpy;
211 Colourmap cmap;
212 Window win;
213 Drawable buf;
214 Atom xembed, wmdeletewin;
215 XIM xim;
216 XIC xic;
217 Draw draw;
218 Visual *vis;
219 int scr;
220 bool isfixed; /* is fixed geometry? */
221 int fx, fy, fw, fh; /* fixed geometry */
222 int tw, th; /* tty width and height */
223 int w, h; /* window width and height */
224 int ch; /* char height */
225 int cw; /* char width */
226 char state; /* focus, redraw, visible */
227 } XWindow;
228
229 typedef struct {
230 KeySym k;
231 uint mask;
232 char s[ESC_BUF_SIZ];
233 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
234 signed char appkey; /* application keypad */
235 signed char appcursor; /* application cursor */
236 signed char crlf; /* crlf mode */
237 } Key;
238
239 /* TODO: use better name for vars... */
240 typedef struct {
241 int mode;
242 int type;
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 xzoom(const Arg *);
271 static void selpaste(const Arg *);
272 static void numlock(const Arg *);
273
274 /* Config.h for applying patches and the configuration. */
275 #include "config.h"
276
277 /* Font structure */
278 typedef struct {
279 int height;
280 int width;
281 int ascent;
282 int descent;
283 short lbearing;
284 short rbearing;
285 XftFont *match;
286 FcFontSet *set;
287 FcPattern *pattern;
288 } Font;
289
290 /* Drawing Context */
291 typedef struct {
292 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
293 Font font, bfont, ifont, ibfont;
294 GC gc;
295 } DC;
296
297 static void die(const char *, ...);
298 static void draw(void);
299 static void redraw(int);
300 static void drawregion(int, int, int, int);
301 static void execsh(void);
302 static void sigchld(int);
303 static void run(void);
304
305 static inline int parse_int(char *);
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, 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 xresettitle(void);
356 static void xseturgency(int);
357 static void xsetsel(char*);
358 static void xtermclear(int, int, int, int);
359 static void xunloadfonts(void);
360 static void xresize(int, int);
361
362 static void expose(XEvent *);
363 static void visibility(XEvent *);
364 static void unmap(XEvent *);
365 static char *kmap(KeySym, uint);
366 static void kpress(XEvent *);
367 static void cmessage(XEvent *);
368 static void cresize(int, int);
369 static void resize(XEvent *);
370 static void focus(XEvent *);
371 static void brelease(XEvent *);
372 static void bpress(XEvent *);
373 static void bmotion(XEvent *);
374 static void selnotify(XEvent *);
375 static void selclear(XEvent *);
376 static void selrequest(XEvent *);
377
378 static void selinit(void);
379 static inline bool selected(int, int);
380 static void selcopy(void);
381 static void selscroll(int, int);
382
383 static int utf8decode(char *, long *);
384 static int utf8encode(long *, char *);
385 static int utf8size(char *);
386 static int isfullutf8(char *, int);
387
388 static ssize_t xwrite(int, char *, size_t);
389 static void *xmalloc(size_t);
390 static void *xrealloc(void *, size_t);
391 static void *xcalloc(size_t, size_t);
392
393 static void (*handler[LASTEvent])(XEvent *) = {
394 [KeyPress] = kpress,
395 [ClientMessage] = cmessage,
396 [ConfigureNotify] = resize,
397 [VisibilityNotify] = visibility,
398 [UnmapNotify] = unmap,
399 [Expose] = expose,
400 [FocusIn] = focus,
401 [FocusOut] = focus,
402 [MotionNotify] = bmotion,
403 [ButtonPress] = bpress,
404 [ButtonRelease] = brelease,
405 [SelectionClear] = selclear,
406 [SelectionNotify] = selnotify,
407 [SelectionRequest] = selrequest,
408 };
409
410 /* Globals */
411 static DC dc;
412 static XWindow xw;
413 static Term term;
414 static CSIEscape csiescseq;
415 static STREscape strescseq;
416 static int cmdfd;
417 static pid_t pid;
418 static Selection sel;
419 static int iofd = -1;
420 static char **opt_cmd = NULL;
421 static char *opt_io = NULL;
422 static char *opt_title = NULL;
423 static char *opt_embed = NULL;
424 static char *opt_class = NULL;
425 static char *opt_font = NULL;
426
427 bool usedbe = False;
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 return BETWEEN(x, bx, ex);
656 }
657
658 return ((sel.b.y < y && y < sel.e.y)
659 || (y == sel.e.y && x <= sel.e.x))
660 || (y == sel.b.y && x >= sel.b.x
661 && (x <= sel.e.x || sel.b.y != sel.e.y));
662 switch(sel.type) {
663 case SEL_REGULAR:
664 return ((sel.b.y < y && y < sel.e.y)
665 || (y == sel.e.y && x <= sel.e.x))
666 || (y == sel.b.y && x >= sel.b.x
667 && (x <= sel.e.x || sel.b.y != sel.e.y));
668 case SEL_RECTANGULAR:
669 return ((sel.b.y <= y && y <= sel.e.y)
670 && (sel.b.x <= x && x <= sel.e.x));
671 };
672 }
673
674 void
675 getbuttoninfo(XEvent *e) {
676 int type;
677 uint state = e->xbutton.state &~Button1Mask;
678
679 sel.alt = IS_SET(MODE_ALTSCREEN);
680
681 sel.ex = x2col(e->xbutton.x);
682 sel.ey = y2row(e->xbutton.y);
683
684 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
685 sel.b.y = MIN(sel.by, sel.ey);
686 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
687 sel.e.y = MAX(sel.by, sel.ey);
688
689 sel.type = SEL_REGULAR;
690 for(type = 1; type < LEN(selmasks); ++type) {
691 if(match(selmasks[type], state)) {
692 sel.type = type;
693 break;
694 }
695 }
696 }
697
698 void
699 mousereport(XEvent *e) {
700 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
701 button = e->xbutton.button, state = e->xbutton.state,
702 len;
703 char buf[40];
704 static int ob, ox, oy;
705
706 /* from urxvt */
707 if(e->xbutton.type == MotionNotify) {
708 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
709 return;
710 button = ob + 32;
711 ox = x, oy = y;
712 } else if(!IS_SET(MODE_MOUSESGR)
713 && (e->xbutton.type == ButtonRelease
714 || button == AnyButton)) {
715 button = 3;
716 } else {
717 button -= Button1;
718 if(button >= 3)
719 button += 64 - 3;
720 if(e->xbutton.type == ButtonPress) {
721 ob = button;
722 ox = x, oy = y;
723 }
724 }
725
726 button += (state & ShiftMask ? 4 : 0)
727 + (state & Mod4Mask ? 8 : 0)
728 + (state & ControlMask ? 16 : 0);
729
730 len = 0;
731 if(IS_SET(MODE_MOUSESGR)) {
732 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
733 button, x+1, y+1,
734 e->xbutton.type == ButtonRelease ? 'm' : 'M');
735 } else if(x < 223 && y < 223) {
736 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
737 32+button, 32+x+1, 32+y+1);
738 } else {
739 return;
740 }
741
742 ttywrite(buf, len);
743 }
744
745 void
746 bpress(XEvent *e) {
747 if(IS_SET(MODE_MOUSE)) {
748 mousereport(e);
749 } else if(e->xbutton.button == Button1) {
750 if(sel.bx != -1) {
751 sel.bx = -1;
752 tsetdirt(sel.b.y, sel.e.y);
753 draw();
754 }
755 sel.mode = 1;
756 sel.type = SEL_REGULAR;
757 sel.ex = sel.bx = x2col(e->xbutton.x);
758 sel.ey = sel.by = y2row(e->xbutton.y);
759 } else if(e->xbutton.button == Button4) {
760 ttywrite("\031", 1);
761 } else if(e->xbutton.button == Button5) {
762 ttywrite("\005", 1);
763 }
764 }
765
766 void
767 selcopy(void) {
768 char *str, *ptr, *p;
769 int x, y, bufsize, is_selected = 0, size;
770 Glyph *gp, *last;
771
772 if(sel.bx == -1) {
773 str = NULL;
774 } else {
775 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
776 ptr = str = xmalloc(bufsize);
777
778 /* append every set & selected glyph to the selection */
779 for(y = sel.b.y; y < sel.e.y + 1; y++) {
780 is_selected = 0;
781 gp = &term.line[y][0];
782 last = gp + term.col;
783
784 while(--last >= gp && !(last->state & GLYPH_SET))
785 /* nothing */;
786
787 for(x = 0; gp <= last; x++, ++gp) {
788 if(!selected(x, y)) {
789 continue;
790 } else {
791 is_selected = 1;
792 }
793
794 p = (gp->state & GLYPH_SET) ? gp->c : " ";
795 size = utf8size(p);
796 memcpy(ptr, p, size);
797 ptr += size;
798 }
799 /* \n at the end of every selected line except for the last one */
800 if(is_selected && y < sel.e.y)
801 *ptr++ = '\n';
802 }
803 *ptr = 0;
804 }
805 xsetsel(str);
806 }
807
808 void
809 selnotify(XEvent *e) {
810 ulong nitems, ofs, rem;
811 int format;
812 uchar *data;
813 Atom type;
814
815 ofs = 0;
816 do {
817 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
818 False, AnyPropertyType, &type, &format,
819 &nitems, &rem, &data)) {
820 fprintf(stderr, "Clipboard allocation failed\n");
821 return;
822 }
823 ttywrite((const char *) data, nitems * format / 8);
824 XFree(data);
825 /* number of 32-bit chunks returned */
826 ofs += nitems * format / 32;
827 } while(rem > 0);
828 }
829
830 void
831 selpaste(const Arg *dummy) {
832 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
833 xw.win, CurrentTime);
834 }
835
836 void selclear(XEvent *e) {
837 if(sel.bx == -1)
838 return;
839 sel.bx = -1;
840 tsetdirt(sel.b.y, sel.e.y);
841 }
842
843 void
844 selrequest(XEvent *e) {
845 XSelectionRequestEvent *xsre;
846 XSelectionEvent xev;
847 Atom xa_targets, string;
848
849 xsre = (XSelectionRequestEvent *) e;
850 xev.type = SelectionNotify;
851 xev.requestor = xsre->requestor;
852 xev.selection = xsre->selection;
853 xev.target = xsre->target;
854 xev.time = xsre->time;
855 /* reject */
856 xev.property = None;
857
858 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
859 if(xsre->target == xa_targets) {
860 /* respond with the supported type */
861 string = sel.xtarget;
862 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
863 XA_ATOM, 32, PropModeReplace,
864 (uchar *) &string, 1);
865 xev.property = xsre->property;
866 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
867 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
868 xsre->target, 8, PropModeReplace,
869 (uchar *) sel.clip, strlen(sel.clip));
870 xev.property = xsre->property;
871 }
872
873 /* all done, send a notification to the listener */
874 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
875 fprintf(stderr, "Error sending SelectionNotify event\n");
876 }
877
878 void
879 xsetsel(char *str) {
880 /* register the selection for both the clipboard and the primary */
881 Atom clipboard;
882
883 free(sel.clip);
884 sel.clip = str;
885
886 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
887
888 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
889 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
890 }
891
892 void
893 brelease(XEvent *e) {
894 struct timeval now;
895
896 if(IS_SET(MODE_MOUSE)) {
897 mousereport(e);
898 return;
899 }
900
901 if(e->xbutton.button == Button2) {
902 selpaste(NULL);
903 } else if(e->xbutton.button == Button1) {
904 sel.mode = 0;
905 getbuttoninfo(e);
906 term.dirty[sel.ey] = 1;
907 if(sel.bx == sel.ex && sel.by == sel.ey) {
908 sel.bx = -1;
909 gettimeofday(&now, NULL);
910
911 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
912 /* triple click on the line */
913 sel.b.x = sel.bx = 0;
914 sel.e.x = sel.ex = term.col;
915 sel.b.y = sel.e.y = sel.ey;
916 selcopy();
917 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
918 /* double click to select word */
919 sel.bx = sel.ex;
920 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
921 term.line[sel.ey][sel.bx-1].c[0] != ' ') {
922 sel.bx--;
923 }
924 sel.b.x = sel.bx;
925 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
926 term.line[sel.ey][sel.ex+1].c[0] != ' ') {
927 sel.ex++;
928 }
929 sel.e.x = sel.ex;
930 sel.b.y = sel.e.y = sel.ey;
931 selcopy();
932 }
933 } else {
934 selcopy();
935 }
936 }
937
938 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
939 gettimeofday(&sel.tclick1, NULL);
940 }
941
942 void
943 bmotion(XEvent *e) {
944 int oldey, oldex;
945
946 if(IS_SET(MODE_MOUSE)) {
947 mousereport(e);
948 return;
949 }
950
951 if(!sel.mode)
952 return;
953
954 oldey = sel.ey;
955 oldex = sel.ex;
956 getbuttoninfo(e);
957
958 if(oldey != sel.ey || oldex != sel.ex) {
959 tsetdirt(sel.b.y, sel.e.y);
960 }
961 }
962
963 void
964 die(const char *errstr, ...) {
965 va_list ap;
966
967 va_start(ap, errstr);
968 vfprintf(stderr, errstr, ap);
969 va_end(ap);
970 exit(EXIT_FAILURE);
971 }
972
973 void
974 execsh(void) {
975 char **args;
976 char *envshell = getenv("SHELL");
977 const struct passwd *pass = getpwuid(getuid());
978 char buf[sizeof(long) * 8 + 1];
979
980 unsetenv("COLUMNS");
981 unsetenv("LINES");
982 unsetenv("TERMCAP");
983
984 if(pass) {
985 setenv("LOGNAME", pass->pw_name, 1);
986 setenv("USER", pass->pw_name, 1);
987 setenv("SHELL", pass->pw_shell, 0);
988 setenv("HOME", pass->pw_dir, 0);
989 }
990
991 snprintf(buf, sizeof(buf), "%lu", xw.win);
992 setenv("WINDOWID", buf, 1);
993
994 signal(SIGCHLD, SIG_DFL);
995 signal(SIGHUP, SIG_DFL);
996 signal(SIGINT, SIG_DFL);
997 signal(SIGQUIT, SIG_DFL);
998 signal(SIGTERM, SIG_DFL);
999 signal(SIGALRM, SIG_DFL);
1000
1001 DEFAULT(envshell, shell);
1002 setenv("TERM", termname, 1);
1003 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1004 execvp(args[0], args);
1005 exit(EXIT_FAILURE);
1006 }
1007
1008 void
1009 sigchld(int a) {
1010 int stat = 0;
1011
1012 if(waitpid(pid, &stat, 0) < 0)
1013 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1014
1015 if(WIFEXITED(stat)) {
1016 exit(WEXITSTATUS(stat));
1017 } else {
1018 exit(EXIT_FAILURE);
1019 }
1020 }
1021
1022 void
1023 ttynew(void) {
1024 int m, s;
1025 struct winsize w = {term.row, term.col, 0, 0};
1026
1027 /* seems to work fine on linux, openbsd and freebsd */
1028 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1029 die("openpty failed: %s\n", SERRNO);
1030
1031 switch(pid = fork()) {
1032 case -1:
1033 die("fork failed\n");
1034 break;
1035 case 0:
1036 setsid(); /* create a new process group */
1037 dup2(s, STDIN_FILENO);
1038 dup2(s, STDOUT_FILENO);
1039 dup2(s, STDERR_FILENO);
1040 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1041 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1042 close(s);
1043 close(m);
1044 execsh();
1045 break;
1046 default:
1047 close(s);
1048 cmdfd = m;
1049 signal(SIGCHLD, sigchld);
1050 if(opt_io) {
1051 iofd = (!strcmp(opt_io, "-")) ?
1052 STDOUT_FILENO :
1053 open(opt_io, O_WRONLY | O_CREAT, 0666);
1054 if(iofd < 0) {
1055 fprintf(stderr, "Error opening %s:%s\n",
1056 opt_io, strerror(errno));
1057 }
1058 }
1059 }
1060 }
1061
1062 void
1063 dump(char c) {
1064 static int col;
1065
1066 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1067 if(++col % 10 == 0)
1068 fprintf(stderr, "\n");
1069 }
1070
1071 void
1072 ttyread(void) {
1073 static char buf[BUFSIZ];
1074 static int buflen = 0;
1075 char *ptr;
1076 char s[UTF_SIZ];
1077 int charsize; /* size of utf8 char in bytes */
1078 long utf8c;
1079 int ret;
1080
1081 /* append read bytes to unprocessed bytes */
1082 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1083 die("Couldn't read from shell: %s\n", SERRNO);
1084
1085 /* process every complete utf8 char */
1086 buflen += ret;
1087 ptr = buf;
1088 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1089 charsize = utf8decode(ptr, &utf8c);
1090 utf8encode(&utf8c, s);
1091 tputc(s, charsize);
1092 ptr += charsize;
1093 buflen -= charsize;
1094 }
1095
1096 /* keep any uncomplete utf8 char for the next call */
1097 memmove(buf, ptr, buflen);
1098 }
1099
1100 void
1101 ttywrite(const char *s, size_t n) {
1102 if(write(cmdfd, s, n) == -1)
1103 die("write error on tty: %s\n", SERRNO);
1104 }
1105
1106 void
1107 ttyresize(void) {
1108 struct winsize w;
1109
1110 w.ws_row = term.row;
1111 w.ws_col = term.col;
1112 w.ws_xpixel = xw.tw;
1113 w.ws_ypixel = xw.th;
1114 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1115 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1116 }
1117
1118 void
1119 tsetdirt(int top, int bot) {
1120 int i;
1121
1122 LIMIT(top, 0, term.row-1);
1123 LIMIT(bot, 0, term.row-1);
1124
1125 for(i = top; i <= bot; i++)
1126 term.dirty[i] = 1;
1127 }
1128
1129 void
1130 tfulldirt(void) {
1131 tsetdirt(0, term.row-1);
1132 }
1133
1134 void
1135 tcursor(int mode) {
1136 static TCursor c;
1137
1138 if(mode == CURSOR_SAVE) {
1139 c = term.c;
1140 } else if(mode == CURSOR_LOAD) {
1141 term.c = c;
1142 tmoveto(c.x, c.y);
1143 }
1144 }
1145
1146 void
1147 treset(void) {
1148 uint i;
1149
1150 term.c = (TCursor){{
1151 .mode = ATTR_NULL,
1152 .fg = defaultfg,
1153 .bg = defaultbg
1154 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1155
1156 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1157 for(i = tabspaces; i < term.col; i += tabspaces)
1158 term.tabs[i] = 1;
1159 term.top = 0;
1160 term.bot = term.row - 1;
1161 term.mode = MODE_WRAP;
1162
1163 tclearregion(0, 0, term.col-1, term.row-1, 0);
1164 tmoveto(0, 0);
1165 tcursor(CURSOR_SAVE);
1166 }
1167
1168 void
1169 tnew(int col, int row) {
1170 /* set screen size */
1171 term.row = row;
1172 term.col = col;
1173 term.line = xmalloc(term.row * sizeof(Line));
1174 term.alt = xmalloc(term.row * sizeof(Line));
1175 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
1176 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
1177
1178 for(row = 0; row < term.row; row++) {
1179 term.line[row] = xmalloc(term.col * sizeof(Glyph));
1180 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
1181 term.dirty[row] = 0;
1182 }
1183
1184 term.numlock = 1;
1185 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1186 /* setup screen */
1187 treset();
1188 }
1189
1190 void
1191 tswapscreen(void) {
1192 Line *tmp = term.line;
1193
1194 term.line = term.alt;
1195 term.alt = tmp;
1196 term.mode ^= MODE_ALTSCREEN;
1197 tfulldirt();
1198 }
1199
1200 void
1201 tscrolldown(int orig, int n) {
1202 int i;
1203 Line temp;
1204
1205 LIMIT(n, 0, term.bot-orig+1);
1206
1207 tclearregion(0, term.bot-n+1, term.col-1, term.bot, 0);
1208
1209 for(i = term.bot; i >= orig+n; i--) {
1210 temp = term.line[i];
1211 term.line[i] = term.line[i-n];
1212 term.line[i-n] = temp;
1213
1214 term.dirty[i] = 1;
1215 term.dirty[i-n] = 1;
1216 }
1217
1218 selscroll(orig, n);
1219 }
1220
1221 void
1222 tscrollup(int orig, int n) {
1223 int i;
1224 Line temp;
1225 LIMIT(n, 0, term.bot-orig+1);
1226
1227 tclearregion(0, orig, term.col-1, orig+n-1, 0);
1228
1229 for(i = orig; i <= term.bot-n; i++) {
1230 temp = term.line[i];
1231 term.line[i] = term.line[i+n];
1232 term.line[i+n] = temp;
1233
1234 term.dirty[i] = 1;
1235 term.dirty[i+n] = 1;
1236 }
1237
1238 selscroll(orig, -n);
1239 }
1240
1241 void
1242 selscroll(int orig, int n) {
1243 if(sel.bx == -1)
1244 return;
1245
1246 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1247 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1248 sel.bx = -1;
1249 return;
1250 }
1251 switch(sel.type) {
1252 case SEL_REGULAR:
1253 if(sel.by < term.top) {
1254 sel.by = term.top;
1255 sel.bx = 0;
1256 }
1257 if(sel.ey > term.bot) {
1258 sel.ey = term.bot;
1259 sel.ex = term.col;
1260 }
1261 break;
1262 case SEL_RECTANGULAR:
1263 if(sel.by < term.top)
1264 sel.by = term.top;
1265 if(sel.ey > term.bot)
1266 sel.ey = term.bot;
1267 break;
1268 };
1269 sel.b.y = sel.by, sel.b.x = sel.bx;
1270 sel.e.y = sel.ey, sel.e.x = sel.ex;
1271 }
1272 }
1273
1274 void
1275 tnewline(int first_col) {
1276 int y = term.c.y;
1277
1278 if(y == term.bot) {
1279 tscrollup(term.top, 1);
1280 } else {
1281 y++;
1282 }
1283 tmoveto(first_col ? 0 : term.c.x, y);
1284 }
1285
1286 void
1287 csiparse(void) {
1288 /* int noarg = 1; */
1289 char *p = csiescseq.buf;
1290
1291 csiescseq.narg = 0;
1292 if(*p == '?')
1293 csiescseq.priv = 1, p++;
1294
1295 while(p < csiescseq.buf+csiescseq.len) {
1296 while(isdigit(*p)) {
1297 csiescseq.arg[csiescseq.narg] *= 10;
1298 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1299 }
1300 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ) {
1301 csiescseq.narg++, p++;
1302 } else {
1303 csiescseq.mode = *p;
1304 csiescseq.narg++;
1305
1306 return;
1307 }
1308 }
1309 }
1310
1311 /* for absolute user moves, when decom is set */
1312 void
1313 tmoveato(int x, int y) {
1314 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1315 }
1316
1317 void
1318 tmoveto(int x, int y) {
1319 int miny, maxy;
1320
1321 if(term.c.state & CURSOR_ORIGIN) {
1322 miny = term.top;
1323 maxy = term.bot;
1324 } else {
1325 miny = 0;
1326 maxy = term.row - 1;
1327 }
1328 LIMIT(x, 0, term.col-1);
1329 LIMIT(y, miny, maxy);
1330 term.c.state &= ~CURSOR_WRAPNEXT;
1331 term.c.x = x;
1332 term.c.y = y;
1333 }
1334
1335 void
1336 tsetchar(char *c, Glyph *attr, int x, int y) {
1337 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1338 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1339 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1340 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1341 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1342 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1343 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1344 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1345 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1346 };
1347
1348 /*
1349 * The table is proudly stolen from rxvt.
1350 */
1351 if(attr->mode & ATTR_GFX) {
1352 if(c[0] >= 0x41 && c[0] <= 0x7e
1353 && vt100_0[c[0] - 0x41]) {
1354 c = vt100_0[c[0] - 0x41];
1355 }
1356 }
1357
1358 term.dirty[y] = 1;
1359 term.line[y][x] = *attr;
1360 memcpy(term.line[y][x].c, c, UTF_SIZ);
1361 term.line[y][x].state |= GLYPH_SET;
1362 }
1363
1364 void
1365 tclearregion(int x1, int y1, int x2, int y2, int bce) {
1366 int x, y, temp;
1367
1368 if(x1 > x2)
1369 temp = x1, x1 = x2, x2 = temp;
1370 if(y1 > y2)
1371 temp = y1, y1 = y2, y2 = temp;
1372
1373 LIMIT(x1, 0, term.col-1);
1374 LIMIT(x2, 0, term.col-1);
1375 LIMIT(y1, 0, term.row-1);
1376 LIMIT(y2, 0, term.row-1);
1377
1378 for(y = y1; y <= y2; y++) {
1379 term.dirty[y] = 1;
1380 for(x = x1; x <= x2; x++) {
1381 if(bce) {
1382 term.line[y][x] = term.c.attr;
1383 memcpy(term.line[y][x].c, " ", 2);
1384 term.line[y][x].state |= GLYPH_SET;
1385 } else {
1386 term.line[y][x].state = 0;
1387 }
1388 }
1389 }
1390 }
1391
1392 void
1393 tdeletechar(int n) {
1394 int src = term.c.x + n;
1395 int dst = term.c.x;
1396 int size = term.col - src;
1397
1398 term.dirty[term.c.y] = 1;
1399
1400 if(src >= term.col) {
1401 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1402 return;
1403 }
1404
1405 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1406 size * sizeof(Glyph));
1407 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y, 0);
1408 }
1409
1410 void
1411 tinsertblank(int n) {
1412 int src = term.c.x;
1413 int dst = src + n;
1414 int size = term.col - dst;
1415
1416 term.dirty[term.c.y] = 1;
1417
1418 if(dst >= term.col) {
1419 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1420 return;
1421 }
1422
1423 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1424 size * sizeof(Glyph));
1425 tclearregion(src, term.c.y, dst - 1, term.c.y, 0);
1426 }
1427
1428 void
1429 tinsertblankline(int n) {
1430 if(term.c.y < term.top || term.c.y > term.bot)
1431 return;
1432
1433 tscrolldown(term.c.y, n);
1434 }
1435
1436 void
1437 tdeleteline(int n) {
1438 if(term.c.y < term.top || term.c.y > term.bot)
1439 return;
1440
1441 tscrollup(term.c.y, n);
1442 }
1443
1444 void
1445 tsetattr(int *attr, int l) {
1446 int i;
1447
1448 for(i = 0; i < l; i++) {
1449 switch(attr[i]) {
1450 case 0:
1451 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1452 | ATTR_ITALIC | ATTR_BLINK);
1453 term.c.attr.fg = defaultfg;
1454 term.c.attr.bg = defaultbg;
1455 break;
1456 case 1:
1457 term.c.attr.mode |= ATTR_BOLD;
1458 break;
1459 case 3:
1460 term.c.attr.mode |= ATTR_ITALIC;
1461 break;
1462 case 4:
1463 term.c.attr.mode |= ATTR_UNDERLINE;
1464 break;
1465 case 5: /* slow blink */
1466 case 6: /* rapid blink */
1467 term.c.attr.mode |= ATTR_BLINK;
1468 break;
1469 case 7:
1470 term.c.attr.mode |= ATTR_REVERSE;
1471 break;
1472 case 21:
1473 case 22:
1474 term.c.attr.mode &= ~ATTR_BOLD;
1475 break;
1476 case 23:
1477 term.c.attr.mode &= ~ATTR_ITALIC;
1478 break;
1479 case 24:
1480 term.c.attr.mode &= ~ATTR_UNDERLINE;
1481 break;
1482 case 25:
1483 case 26:
1484 term.c.attr.mode &= ~ATTR_BLINK;
1485 break;
1486 case 27:
1487 term.c.attr.mode &= ~ATTR_REVERSE;
1488 break;
1489 case 38:
1490 if(i + 2 < l && attr[i + 1] == 5) {
1491 i += 2;
1492 if(BETWEEN(attr[i], 0, 255)) {
1493 term.c.attr.fg = attr[i];
1494 } else {
1495 fprintf(stderr,
1496 "erresc: bad fgcolor %d\n",
1497 attr[i]);
1498 }
1499 } else {
1500 fprintf(stderr,
1501 "erresc(38): gfx attr %d unknown\n",
1502 attr[i]);
1503 }
1504 break;
1505 case 39:
1506 term.c.attr.fg = defaultfg;
1507 break;
1508 case 48:
1509 if(i + 2 < l && attr[i + 1] == 5) {
1510 i += 2;
1511 if(BETWEEN(attr[i], 0, 255)) {
1512 term.c.attr.bg = attr[i];
1513 } else {
1514 fprintf(stderr,
1515 "erresc: bad bgcolor %d\n",
1516 attr[i]);
1517 }
1518 } else {
1519 fprintf(stderr,
1520 "erresc(48): gfx attr %d unknown\n",
1521 attr[i]);
1522 }
1523 break;
1524 case 49:
1525 term.c.attr.bg = defaultbg;
1526 break;
1527 default:
1528 if(BETWEEN(attr[i], 30, 37)) {
1529 term.c.attr.fg = attr[i] - 30;
1530 } else if(BETWEEN(attr[i], 40, 47)) {
1531 term.c.attr.bg = attr[i] - 40;
1532 } else if(BETWEEN(attr[i], 90, 97)) {
1533 term.c.attr.fg = attr[i] - 90 + 8;
1534 } else if(BETWEEN(attr[i], 100, 107)) {
1535 term.c.attr.bg = attr[i] - 100 + 8;
1536 } else {
1537 fprintf(stderr,
1538 "erresc(default): gfx attr %d unknown\n",
1539 attr[i]), csidump();
1540 }
1541 break;
1542 }
1543 }
1544 }
1545
1546 void
1547 tsetscroll(int t, int b) {
1548 int temp;
1549
1550 LIMIT(t, 0, term.row-1);
1551 LIMIT(b, 0, term.row-1);
1552 if(t > b) {
1553 temp = t;
1554 t = b;
1555 b = temp;
1556 }
1557 term.top = t;
1558 term.bot = b;
1559 }
1560
1561 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1562
1563 void
1564 tsetmode(bool priv, bool set, int *args, int narg) {
1565 int *lim, mode;
1566 bool alt;
1567
1568 for(lim = args + narg; args < lim; ++args) {
1569 if(priv) {
1570 switch(*args) {
1571 break;
1572 case 1: /* DECCKM -- Cursor key */
1573 MODBIT(term.mode, set, MODE_APPCURSOR);
1574 break;
1575 case 5: /* DECSCNM -- Reverse video */
1576 mode = term.mode;
1577 MODBIT(term.mode, set, MODE_REVERSE);
1578 if(mode != term.mode)
1579 redraw(REDRAW_TIMEOUT);
1580 break;
1581 case 6: /* DECOM -- Origin */
1582 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1583 tmoveato(0, 0);
1584 break;
1585 case 7: /* DECAWM -- Auto wrap */
1586 MODBIT(term.mode, set, MODE_WRAP);
1587 break;
1588 case 0: /* Error (IGNORED) */
1589 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1590 case 3: /* DECCOLM -- Column (IGNORED) */
1591 case 4: /* DECSCLM -- Scroll (IGNORED) */
1592 case 8: /* DECARM -- Auto repeat (IGNORED) */
1593 case 18: /* DECPFF -- Printer feed (IGNORED) */
1594 case 19: /* DECPEX -- Printer extent (IGNORED) */
1595 case 42: /* DECNRCM -- National characters (IGNORED) */
1596 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1597 break;
1598 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1599 MODBIT(term.mode, !set, MODE_HIDE);
1600 break;
1601 case 1000: /* 1000,1002: enable xterm mouse report */
1602 MODBIT(term.mode, set, MODE_MOUSEBTN);
1603 MODBIT(term.mode, 0, MODE_MOUSEMOTION);
1604 break;
1605 case 1002:
1606 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1607 MODBIT(term.mode, 0, MODE_MOUSEBTN);
1608 break;
1609 case 1006:
1610 MODBIT(term.mode, set, MODE_MOUSESGR);
1611 break;
1612 case 1049: /* = 1047 and 1048 */
1613 case 47:
1614 case 1047: {
1615 alt = IS_SET(MODE_ALTSCREEN);
1616 if(alt) {
1617 tclearregion(0, 0, term.col-1,
1618 term.row-1, 0);
1619 }
1620 if(set ^ alt) /* set is always 1 or 0 */
1621 tswapscreen();
1622 if(*args != 1049)
1623 break;
1624 }
1625 /* pass through */
1626 case 1048:
1627 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1628 break;
1629 default:
1630 fprintf(stderr,
1631 "erresc: unknown private set/reset mode %d\n",
1632 *args);
1633 break;
1634 }
1635 } else {
1636 switch(*args) {
1637 case 0: /* Error (IGNORED) */
1638 break;
1639 case 2: /* KAM -- keyboard action */
1640 MODBIT(term.mode, set, MODE_KBDLOCK);
1641 break;
1642 case 4: /* IRM -- Insertion-replacement */
1643 MODBIT(term.mode, set, MODE_INSERT);
1644 break;
1645 case 12: /* SRM -- Send/Receive */
1646 MODBIT(term.mode, !set, MODE_ECHO);
1647 break;
1648 case 20: /* LNM -- Linefeed/new line */
1649 MODBIT(term.mode, set, MODE_CRLF);
1650 break;
1651 default:
1652 fprintf(stderr,
1653 "erresc: unknown set/reset mode %d\n",
1654 *args);
1655 break;
1656 }
1657 }
1658 }
1659 }
1660 #undef MODBIT
1661
1662
1663 void
1664 csihandle(void) {
1665 switch(csiescseq.mode) {
1666 default:
1667 unknown:
1668 fprintf(stderr, "erresc: unknown csi ");
1669 csidump();
1670 /* die(""); */
1671 break;
1672 case '@': /* ICH -- Insert <n> blank char */
1673 DEFAULT(csiescseq.arg[0], 1);
1674 tinsertblank(csiescseq.arg[0]);
1675 break;
1676 case 'A': /* CUU -- Cursor <n> Up */
1677 DEFAULT(csiescseq.arg[0], 1);
1678 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1679 break;
1680 case 'B': /* CUD -- Cursor <n> Down */
1681 case 'e': /* VPR --Cursor <n> Down */
1682 DEFAULT(csiescseq.arg[0], 1);
1683 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1684 break;
1685 case 'c': /* DA -- Device Attributes */
1686 if(csiescseq.arg[0] == 0)
1687 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1688 break;
1689 case 'C': /* CUF -- Cursor <n> Forward */
1690 case 'a': /* HPR -- Cursor <n> Forward */
1691 DEFAULT(csiescseq.arg[0], 1);
1692 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1693 break;
1694 case 'D': /* CUB -- Cursor <n> Backward */
1695 DEFAULT(csiescseq.arg[0], 1);
1696 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1697 break;
1698 case 'E': /* CNL -- Cursor <n> Down and first col */
1699 DEFAULT(csiescseq.arg[0], 1);
1700 tmoveto(0, term.c.y+csiescseq.arg[0]);
1701 break;
1702 case 'F': /* CPL -- Cursor <n> Up and first col */
1703 DEFAULT(csiescseq.arg[0], 1);
1704 tmoveto(0, term.c.y-csiescseq.arg[0]);
1705 break;
1706 case 'g': /* TBC -- Tabulation clear */
1707 switch(csiescseq.arg[0]) {
1708 case 0: /* clear current tab stop */
1709 term.tabs[term.c.x] = 0;
1710 break;
1711 case 3: /* clear all the tabs */
1712 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1713 break;
1714 default:
1715 goto unknown;
1716 }
1717 break;
1718 case 'G': /* CHA -- Move to <col> */
1719 case '`': /* HPA */
1720 DEFAULT(csiescseq.arg[0], 1);
1721 tmoveto(csiescseq.arg[0]-1, term.c.y);
1722 break;
1723 case 'H': /* CUP -- Move to <row> <col> */
1724 case 'f': /* HVP */
1725 DEFAULT(csiescseq.arg[0], 1);
1726 DEFAULT(csiescseq.arg[1], 1);
1727 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1728 break;
1729 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1730 DEFAULT(csiescseq.arg[0], 1);
1731 while(csiescseq.arg[0]--)
1732 tputtab(1);
1733 break;
1734 case 'J': /* ED -- Clear screen */
1735 sel.bx = -1;
1736 switch(csiescseq.arg[0]) {
1737 case 0: /* below */
1738 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 1);
1739 if(term.c.y < term.row-1) {
1740 tclearregion(0, term.c.y+1, term.col-1,
1741 term.row-1, 1);
1742 }
1743 break;
1744 case 1: /* above */
1745 if(term.c.y > 1)
1746 tclearregion(0, 0, term.col-1, term.c.y-1, 1);
1747 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1748 break;
1749 case 2: /* all */
1750 tclearregion(0, 0, term.col-1, term.row-1, 1);
1751 break;
1752 default:
1753 goto unknown;
1754 }
1755 break;
1756 case 'K': /* EL -- Clear line */
1757 switch(csiescseq.arg[0]) {
1758 case 0: /* right */
1759 tclearregion(term.c.x, term.c.y, term.col-1,
1760 term.c.y, 1);
1761 break;
1762 case 1: /* left */
1763 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1764 break;
1765 case 2: /* all */
1766 tclearregion(0, term.c.y, term.col-1, term.c.y, 1);
1767 break;
1768 }
1769 break;
1770 case 'S': /* SU -- Scroll <n> line up */
1771 DEFAULT(csiescseq.arg[0], 1);
1772 tscrollup(term.top, csiescseq.arg[0]);
1773 break;
1774 case 'T': /* SD -- Scroll <n> line down */
1775 DEFAULT(csiescseq.arg[0], 1);
1776 tscrolldown(term.top, csiescseq.arg[0]);
1777 break;
1778 case 'L': /* IL -- Insert <n> blank lines */
1779 DEFAULT(csiescseq.arg[0], 1);
1780 tinsertblankline(csiescseq.arg[0]);
1781 break;
1782 case 'l': /* RM -- Reset Mode */
1783 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1784 break;
1785 case 'M': /* DL -- Delete <n> lines */
1786 DEFAULT(csiescseq.arg[0], 1);
1787 tdeleteline(csiescseq.arg[0]);
1788 break;
1789 case 'X': /* ECH -- Erase <n> char */
1790 DEFAULT(csiescseq.arg[0], 1);
1791 tclearregion(term.c.x, term.c.y,
1792 term.c.x + csiescseq.arg[0] - 1, term.c.y, 1);
1793 break;
1794 case 'P': /* DCH -- Delete <n> char */
1795 DEFAULT(csiescseq.arg[0], 1);
1796 tdeletechar(csiescseq.arg[0]);
1797 break;
1798 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1799 DEFAULT(csiescseq.arg[0], 1);
1800 while(csiescseq.arg[0]--)
1801 tputtab(0);
1802 break;
1803 case 'd': /* VPA -- Move to <row> */
1804 DEFAULT(csiescseq.arg[0], 1);
1805 tmoveato(term.c.x, csiescseq.arg[0]-1);
1806 break;
1807 case 'h': /* SM -- Set terminal mode */
1808 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1809 break;
1810 case 'm': /* SGR -- Terminal attribute (color) */
1811 tsetattr(csiescseq.arg, csiescseq.narg);
1812 break;
1813 case 'r': /* DECSTBM -- Set Scrolling Region */
1814 if(csiescseq.priv) {
1815 goto unknown;
1816 } else {
1817 DEFAULT(csiescseq.arg[0], 1);
1818 DEFAULT(csiescseq.arg[1], term.row);
1819 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1820 tmoveato(0, 0);
1821 }
1822 break;
1823 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1824 tcursor(CURSOR_SAVE);
1825 break;
1826 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1827 tcursor(CURSOR_LOAD);
1828 break;
1829 }
1830 }
1831
1832 void
1833 csidump(void) {
1834 int i;
1835 uint c;
1836
1837 printf("ESC[");
1838 for(i = 0; i < csiescseq.len; i++) {
1839 c = csiescseq.buf[i] & 0xff;
1840 if(isprint(c)) {
1841 putchar(c);
1842 } else if(c == '\n') {
1843 printf("(\\n)");
1844 } else if(c == '\r') {
1845 printf("(\\r)");
1846 } else if(c == 0x1b) {
1847 printf("(\\e)");
1848 } else {
1849 printf("(%02x)", c);
1850 }
1851 }
1852 putchar('\n');
1853 }
1854
1855 void
1856 csireset(void) {
1857 memset(&csiescseq, 0, sizeof(csiescseq));
1858 }
1859
1860 inline int
1861 parse_int(char *s) {
1862 int x = 0;
1863 char c;
1864 while(isdigit(c = *s)) {
1865 if((INT_MAX - c + '0') / 10 >= x) {
1866 x = x * 10 + c - '0';
1867 } else
1868 return -1;
1869 s++;
1870 }
1871 if(*s != '\0')
1872 return -1;
1873 return x;
1874 }
1875
1876 void
1877 strhandle(void) {
1878 char *p = NULL;
1879 int i, j;
1880 int narg;
1881
1882 /*
1883 * TODO: make this being useful in case of color palette change.
1884 */
1885 strparse();
1886 narg = strescseq.narg;
1887
1888 switch(strescseq.type) {
1889 case ']': /* OSC -- Operating System Command */
1890 switch(i = parse_int(strescseq.args[0])) {
1891 case 0:
1892 case 1:
1893 case 2:
1894 /*
1895 * TODO: Handle special chars in string, like umlauts.
1896 */
1897 if(narg > 1)
1898 XStoreName(xw.dpy, xw.win, strescseq.args[2]);
1899 break;
1900 case 4: /* color set */
1901 if(narg < 3)
1902 break;
1903 p = strescseq.args[2];
1904 /* fall through */
1905 case 104: /* color reset, here p = NULL */
1906 j = (narg > 1) ? parse_int(strescseq.args[1]) : -1;
1907 if (!xsetcolorname(j, p))
1908 fprintf(stderr, "erresc: invalid color %s\n", p);
1909 else {
1910 redraw(0); /* TODO if defaultbg color is changed, borders are dirty */
1911 }
1912 break;
1913 default:
1914 fprintf(stderr, "erresc: unknown str ");
1915 strdump();
1916 break;
1917 }
1918 break;
1919 case 'k': /* old title set compatibility */
1920 XStoreName(xw.dpy, xw.win, strescseq.buf);
1921 break;
1922 case 'P': /* DSC -- Device Control String */
1923 case '_': /* APC -- Application Program Command */
1924 case '^': /* PM -- Privacy Message */
1925 default:
1926 fprintf(stderr, "erresc: unknown str ");
1927 strdump();
1928 /* die(""); */
1929 break;
1930 }
1931 }
1932
1933 void
1934 strparse(void) {
1935 /*
1936 * TODO: Implement parsing like for CSI when required.
1937 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1938 */
1939 int narg = 0;
1940 char *start = strescseq.buf, *end = start + strescseq.len;
1941 strescseq.args[0] = start;
1942 while(start < end && narg < LEN(strescseq.args)) {
1943 start = memchr(start, ';', end - start);
1944 if(!start)
1945 break;
1946 *start++ = '\0';
1947 if(start < end) {
1948 strescseq.args[++narg] = start;
1949 }
1950 }
1951 strescseq.narg = narg + 1;
1952 }
1953
1954 void
1955 strdump(void) {
1956 int i;
1957 uint c;
1958
1959 printf("ESC%c", strescseq.type);
1960 for(i = 0; i < strescseq.len; i++) {
1961 c = strescseq.buf[i] & 0xff;
1962 if(isprint(c)) {
1963 putchar(c);
1964 } else if(c == '\n') {
1965 printf("(\\n)");
1966 } else if(c == '\r') {
1967 printf("(\\r)");
1968 } else if(c == 0x1b) {
1969 printf("(\\e)");
1970 } else {
1971 printf("(%02x)", c);
1972 }
1973 }
1974 printf("ESC\\\n");
1975 }
1976
1977 void
1978 strreset(void) {
1979 memset(&strescseq, 0, sizeof(strescseq));
1980 }
1981
1982 void
1983 tputtab(bool forward) {
1984 uint x = term.c.x;
1985
1986 if(forward) {
1987 if(x == term.col)
1988 return;
1989 for(++x; x < term.col && !term.tabs[x]; ++x)
1990 /* nothing */ ;
1991 } else {
1992 if(x == 0)
1993 return;
1994 for(--x; x > 0 && !term.tabs[x]; --x)
1995 /* nothing */ ;
1996 }
1997 tmoveto(x, term.c.y);
1998 }
1999
2000 void
2001 techo(char *buf, int len) {
2002 for(; len > 0; buf++, len--) {
2003 char c = *buf;
2004
2005 if(c == '\033') { /* escape */
2006 tputc("^", 1);
2007 tputc("[", 1);
2008 } else if(c < '\x20') { /* control code */
2009 if(c != '\n' && c != '\r' && c != '\t') {
2010 c |= '\x40';
2011 tputc("^", 1);
2012 }
2013 tputc(&c, 1);
2014 } else {
2015 break;
2016 }
2017 }
2018 if(len)
2019 tputc(buf, len);
2020 }
2021
2022 void
2023 tputc(char *c, int len) {
2024 uchar ascii = *c;
2025 bool control = ascii < '\x20' || ascii == 0177;
2026
2027 if(iofd != -1) {
2028 if(xwrite(iofd, c, len) < 0) {
2029 fprintf(stderr, "Error writing in %s:%s\n",
2030 opt_io, strerror(errno));
2031 close(iofd);
2032 iofd = -1;
2033 }
2034 }
2035
2036 /*
2037 * STR sequences must be checked before anything else
2038 * because it can use some control codes as part of the sequence.
2039 */
2040 if(term.esc & ESC_STR) {
2041 switch(ascii) {
2042 case '\033':
2043 term.esc = ESC_START | ESC_STR_END;
2044 break;
2045 case '\a': /* backwards compatibility to xterm */
2046 term.esc = 0;
2047 strhandle();
2048 break;
2049 default:
2050 if(strescseq.len + len < sizeof(strescseq.buf)) {
2051 memmove(&strescseq.buf[strescseq.len], c, len);
2052 strescseq.len += len;
2053 } else {
2054 /*
2055 * Here is a bug in terminals. If the user never sends
2056 * some code to stop the str or esc command, then st
2057 * will stop responding. But this is better than
2058 * silently failing with unknown characters. At least
2059 * then users will report back.
2060 *
2061 * In the case users ever get fixed, here is the code:
2062 */
2063 /*
2064 * term.esc = 0;
2065 * strhandle();
2066 */
2067 }
2068 }
2069 return;
2070 }
2071
2072 /*
2073 * Actions of control codes must be performed as soon they arrive
2074 * because they can be embedded inside a control sequence, and
2075 * they must not cause conflicts with sequences.
2076 */
2077 if(control) {
2078 switch(ascii) {
2079 case '\t': /* HT */
2080 tputtab(1);
2081 return;
2082 case '\b': /* BS */
2083 tmoveto(term.c.x-1, term.c.y);
2084 return;
2085 case '\r': /* CR */
2086 tmoveto(0, term.c.y);
2087 return;
2088 case '\f': /* LF */
2089 case '\v': /* VT */
2090 case '\n': /* LF */
2091 /* go to first col if the mode is set */
2092 tnewline(IS_SET(MODE_CRLF));
2093 return;
2094 case '\a': /* BEL */
2095 if(!(xw.state & WIN_FOCUSED))
2096 xseturgency(1);
2097 return;
2098 case '\033': /* ESC */
2099 csireset();
2100 term.esc = ESC_START;
2101 return;
2102 case '\016': /* SO */
2103 case '\017': /* SI */
2104 /*
2105 * Different charsets are hard to handle. Applications
2106 * should use the right alt charset escapes for the
2107 * only reason they still exist: line drawing. The
2108 * rest is incompatible history st should not support.
2109 */
2110 return;
2111 case '\032': /* SUB */
2112 case '\030': /* CAN */
2113 csireset();
2114 return;
2115 case '\005': /* ENQ (IGNORED) */
2116 case '\000': /* NUL (IGNORED) */
2117 case '\021': /* XON (IGNORED) */
2118 case '\023': /* XOFF (IGNORED) */
2119 case 0177: /* DEL (IGNORED) */
2120 return;
2121 }
2122 } else if(term.esc & ESC_START) {
2123 if(term.esc & ESC_CSI) {
2124 csiescseq.buf[csiescseq.len++] = ascii;
2125 if(BETWEEN(ascii, 0x40, 0x7E)
2126 || csiescseq.len >= ESC_BUF_SIZ) {
2127 term.esc = 0;
2128 csiparse(), csihandle();
2129 }
2130 } else if(term.esc & ESC_STR_END) {
2131 term.esc = 0;
2132 if(ascii == '\\')
2133 strhandle();
2134 } else if(term.esc & ESC_ALTCHARSET) {
2135 switch(ascii) {
2136 case '0': /* Line drawing set */
2137 term.c.attr.mode |= ATTR_GFX;
2138 break;
2139 case 'B': /* USASCII */
2140 term.c.attr.mode &= ~ATTR_GFX;
2141 break;
2142 case 'A': /* UK (IGNORED) */
2143 case '<': /* multinational charset (IGNORED) */
2144 case '5': /* Finnish (IGNORED) */
2145 case 'C': /* Finnish (IGNORED) */
2146 case 'K': /* German (IGNORED) */
2147 break;
2148 default:
2149 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2150 }
2151 term.esc = 0;
2152 } else if(term.esc & ESC_TEST) {
2153 if(ascii == '8') { /* DEC screen alignment test. */
2154 char E[UTF_SIZ] = "E";
2155 int x, y;
2156
2157 for(x = 0; x < term.col; ++x) {
2158 for(y = 0; y < term.row; ++y)
2159 tsetchar(E, &term.c.attr, x, y);
2160 }
2161 }
2162 term.esc = 0;
2163 } else {
2164 switch(ascii) {
2165 case '[':
2166 term.esc |= ESC_CSI;
2167 break;
2168 case '#':
2169 term.esc |= ESC_TEST;
2170 break;
2171 case 'P': /* DCS -- Device Control String */
2172 case '_': /* APC -- Application Program Command */
2173 case '^': /* PM -- Privacy Message */
2174 case ']': /* OSC -- Operating System Command */
2175 case 'k': /* old title set compatibility */
2176 strreset();
2177 strescseq.type = ascii;
2178 term.esc |= ESC_STR;
2179 break;
2180 case '(': /* set primary charset G0 */
2181 term.esc |= ESC_ALTCHARSET;
2182 break;
2183 case ')': /* set secondary charset G1 (IGNORED) */
2184 case '*': /* set tertiary charset G2 (IGNORED) */
2185 case '+': /* set quaternary charset G3 (IGNORED) */
2186 term.esc = 0;
2187 break;
2188 case 'D': /* IND -- Linefeed */
2189 if(term.c.y == term.bot) {
2190 tscrollup(term.top, 1);
2191 } else {
2192 tmoveto(term.c.x, term.c.y+1);
2193 }
2194 term.esc = 0;
2195 break;
2196 case 'E': /* NEL -- Next line */
2197 tnewline(1); /* always go to first col */
2198 term.esc = 0;
2199 break;
2200 case 'H': /* HTS -- Horizontal tab stop */
2201 term.tabs[term.c.x] = 1;
2202 term.esc = 0;
2203 break;
2204 case 'M': /* RI -- Reverse index */
2205 if(term.c.y == term.top) {
2206 tscrolldown(term.top, 1);
2207 } else {
2208 tmoveto(term.c.x, term.c.y-1);
2209 }
2210 term.esc = 0;
2211 break;
2212 case 'Z': /* DECID -- Identify Terminal */
2213 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2214 term.esc = 0;
2215 break;
2216 case 'c': /* RIS -- Reset to inital state */
2217 treset();
2218 term.esc = 0;
2219 xresettitle();
2220 break;
2221 case '=': /* DECPAM -- Application keypad */
2222 term.mode |= MODE_APPKEYPAD;
2223 term.esc = 0;
2224 break;
2225 case '>': /* DECPNM -- Normal keypad */
2226 term.mode &= ~MODE_APPKEYPAD;
2227 term.esc = 0;
2228 break;
2229 case '7': /* DECSC -- Save Cursor */
2230 tcursor(CURSOR_SAVE);
2231 term.esc = 0;
2232 break;
2233 case '8': /* DECRC -- Restore Cursor */
2234 tcursor(CURSOR_LOAD);
2235 term.esc = 0;
2236 break;
2237 case '\\': /* ST -- Stop */
2238 term.esc = 0;
2239 break;
2240 default:
2241 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2242 (uchar) ascii, isprint(ascii)? ascii:'.');
2243 term.esc = 0;
2244 }
2245 }
2246 /*
2247 * All characters which form part of a sequence are not
2248 * printed
2249 */
2250 return;
2251 }
2252 /*
2253 * Display control codes only if we are in graphic mode
2254 */
2255 if(control && !(term.c.attr.mode & ATTR_GFX))
2256 return;
2257 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2258 sel.bx = -1;
2259 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2260 tnewline(1); /* always go to first col */
2261
2262 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2263 memmove(&term.line[term.c.y][term.c.x+1],
2264 &term.line[term.c.y][term.c.x],
2265 (term.col - term.c.x - 1) * sizeof(Glyph));
2266 }
2267
2268 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2269 if(term.c.x+1 < term.col) {
2270 tmoveto(term.c.x+1, term.c.y);
2271 } else {
2272 term.c.state |= CURSOR_WRAPNEXT;
2273 }
2274 }
2275
2276 int
2277 tresize(int col, int row) {
2278 int i, x;
2279 int minrow = MIN(row, term.row);
2280 int mincol = MIN(col, term.col);
2281 int slide = term.c.y - row + 1;
2282 bool *bp;
2283
2284 if(col < 1 || row < 1)
2285 return 0;
2286
2287 /* free unneeded rows */
2288 i = 0;
2289 if(slide > 0) {
2290 /*
2291 * slide screen to keep cursor where we expect it -
2292 * tscrollup would work here, but we can optimize to
2293 * memmove because we're freeing the earlier lines
2294 */
2295 for(/* i = 0 */; i < slide; i++) {
2296 free(term.line[i]);
2297 free(term.alt[i]);
2298 }
2299 memmove(term.line, term.line + slide, row * sizeof(Line));
2300 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2301 }
2302 for(i += row; i < term.row; i++) {
2303 free(term.line[i]);
2304 free(term.alt[i]);
2305 }
2306
2307 /* resize to new height */
2308 term.line = xrealloc(term.line, row * sizeof(Line));
2309 term.alt = xrealloc(term.alt, row * sizeof(Line));
2310 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2311 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2312
2313 /* resize each row to new width, zero-pad if needed */
2314 for(i = 0; i < minrow; i++) {
2315 term.dirty[i] = 1;
2316 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2317 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2318 for(x = mincol; x < col; x++) {
2319 term.line[i][x].state = 0;
2320 term.alt[i][x].state = 0;
2321 }
2322 }
2323
2324 /* allocate any new rows */
2325 for(/* i == minrow */; i < row; i++) {
2326 term.dirty[i] = 1;
2327 term.line[i] = xcalloc(col, sizeof(Glyph));
2328 term.alt [i] = xcalloc(col, sizeof(Glyph));
2329 }
2330 if(col > term.col) {
2331 bp = term.tabs + term.col;
2332
2333 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2334 while(--bp > term.tabs && !*bp)
2335 /* nothing */ ;
2336 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2337 *bp = 1;
2338 }
2339 /* update terminal size */
2340 term.col = col;
2341 term.row = row;
2342 /* reset scrolling region */
2343 tsetscroll(0, row-1);
2344 /* make use of the LIMIT in tmoveto */
2345 tmoveto(term.c.x, term.c.y);
2346
2347 return (slide > 0);
2348 }
2349
2350 void
2351 xresize(int col, int row) {
2352 xw.tw = MAX(1, col * xw.cw);
2353 xw.th = MAX(1, row * xw.ch);
2354
2355 if(!usedbe) {
2356 XFreePixmap(xw.dpy, xw.buf);
2357 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2358 DefaultDepth(xw.dpy, xw.scr));
2359 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg].pixel);
2360 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2361 }
2362
2363 XftDrawChange(xw.draw, xw.buf);
2364 }
2365
2366 static inline ushort
2367 sixd_to_16bit(int x) {
2368 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2369 }
2370
2371 void
2372 xloadcols(void) {
2373 int i, r, g, b;
2374 XRenderColor color = { .alpha = 0xffff };
2375
2376 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2377 for(i = 0; i < LEN(colorname); i++) {
2378 if(!colorname[i])
2379 continue;
2380 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2381 die("Could not allocate color '%s'\n", colorname[i]);
2382 }
2383 }
2384
2385 /* load colors [16-255] ; same colors as xterm */
2386 for(i = 16, r = 0; r < 6; r++) {
2387 for(g = 0; g < 6; g++) {
2388 for(b = 0; b < 6; b++) {
2389 color.red = sixd_to_16bit(r);
2390 color.green = sixd_to_16bit(g);
2391 color.blue = sixd_to_16bit(b);
2392 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2393 die("Could not allocate color %d\n", i);
2394 }
2395 i++;
2396 }
2397 }
2398 }
2399
2400 for(r = 0; r < 24; r++, i++) {
2401 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2402 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2403 &dc.col[i])) {
2404 die("Could not allocate color %d\n", i);
2405 }
2406 }
2407 }
2408
2409 int
2410 xsetcolorname(int x, const char *name) {
2411 XRenderColor color = { .alpha = 0xffff };
2412 Colour colour;
2413 if (x < 0 || x > LEN(colorname))
2414 return -1;
2415 if(!name) {
2416 if(16 <= x && x < 16 + 216) {
2417 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2418 color.red = sixd_to_16bit(r);
2419 color.green = sixd_to_16bit(g);
2420 color.blue = sixd_to_16bit(b);
2421 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2422 return 0; /* something went wrong */
2423 dc.col[x] = colour;
2424 return 1;
2425 } else if (16 + 216 <= x && x < 256) {
2426 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2427 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2428 return 0; /* something went wrong */
2429 dc.col[x] = colour;
2430 return 1;
2431 } else {
2432 name = colorname[x];
2433 }
2434 }
2435 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2436 return 0;
2437 dc.col[x] = colour;
2438 return 1;
2439 }
2440
2441 void
2442 xtermclear(int col1, int row1, int col2, int row2) {
2443 XftDrawRect(xw.draw,
2444 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2445 borderpx + col1 * xw.cw,
2446 borderpx + row1 * xw.ch,
2447 (col2-col1+1) * xw.cw,
2448 (row2-row1+1) * xw.ch);
2449 }
2450
2451 /*
2452 * Absolute coordinates.
2453 */
2454 void
2455 xclear(int x1, int y1, int x2, int y2) {
2456 XftDrawRect(xw.draw,
2457 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2458 x1, y1, x2-x1, y2-y1);
2459 }
2460
2461 void
2462 xhints(void) {
2463 XClassHint class = {opt_class ? opt_class : termname, termname};
2464 XWMHints wm = {.flags = InputHint, .input = 1};
2465 XSizeHints *sizeh = NULL;
2466
2467 sizeh = XAllocSizeHints();
2468 if(xw.isfixed == False) {
2469 sizeh->flags = PSize | PResizeInc | PBaseSize;
2470 sizeh->height = xw.h;
2471 sizeh->width = xw.w;
2472 sizeh->height_inc = xw.ch;
2473 sizeh->width_inc = xw.cw;
2474 sizeh->base_height = 2 * borderpx;
2475 sizeh->base_width = 2 * borderpx;
2476 } else {
2477 sizeh->flags = PMaxSize | PMinSize;
2478 sizeh->min_width = sizeh->max_width = xw.fw;
2479 sizeh->min_height = sizeh->max_height = xw.fh;
2480 }
2481
2482 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2483 XFree(sizeh);
2484 }
2485
2486 int
2487 xloadfont(Font *f, FcPattern *pattern) {
2488 FcPattern *match;
2489 FcResult result;
2490
2491 match = FcFontMatch(NULL, pattern, &result);
2492 if(!match)
2493 return 1;
2494
2495 if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
2496 FcPatternDestroy(match);
2497 return 1;
2498 }
2499
2500 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2501 FcPatternDestroy(match);
2502 return 1;
2503 }
2504
2505 f->pattern = FcPatternDuplicate(pattern);
2506
2507 f->ascent = f->match->ascent;
2508 f->descent = f->match->descent;
2509 f->lbearing = 0;
2510 f->rbearing = f->match->max_advance_width;
2511
2512 f->height = f->match->height;
2513 f->width = f->lbearing + f->rbearing;
2514
2515 return 0;
2516 }
2517
2518 void
2519 xloadfonts(char *fontstr, int fontsize) {
2520 FcPattern *pattern;
2521 FcResult result;
2522 double fontval;
2523
2524 if(fontstr[0] == '-') {
2525 pattern = XftXlfdParse(fontstr, False, False);
2526 } else {
2527 pattern = FcNameParse((FcChar8 *)fontstr);
2528 }
2529
2530 if(!pattern)
2531 die("st: can't open font %s\n", fontstr);
2532
2533 if(fontsize > 0) {
2534 FcPatternDel(pattern, FC_PIXEL_SIZE);
2535 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2536 usedfontsize = fontsize;
2537 } else {
2538 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2539 if(result == FcResultMatch) {
2540 usedfontsize = (int)fontval;
2541 } else {
2542 /*
2543 * Default font size is 12, if none given. This is to
2544 * have a known usedfontsize value.
2545 */
2546 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2547 usedfontsize = 12;
2548 }
2549 }
2550
2551 FcConfigSubstitute(0, pattern, FcMatchPattern);
2552 FcDefaultSubstitute(pattern);
2553
2554 if(xloadfont(&dc.font, pattern))
2555 die("st: can't open font %s\n", fontstr);
2556
2557 /* Setting character width and height. */
2558 xw.cw = dc.font.width;
2559 xw.ch = dc.font.height;
2560
2561 FcPatternDel(pattern, FC_SLANT);
2562 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2563 if(xloadfont(&dc.ifont, pattern))
2564 die("st: can't open font %s\n", fontstr);
2565
2566 FcPatternDel(pattern, FC_WEIGHT);
2567 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2568 if(xloadfont(&dc.ibfont, pattern))
2569 die("st: can't open font %s\n", fontstr);
2570
2571 FcPatternDel(pattern, FC_SLANT);
2572 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2573 if(xloadfont(&dc.bfont, pattern))
2574 die("st: can't open font %s\n", fontstr);
2575
2576 FcPatternDestroy(pattern);
2577 }
2578
2579 void
2580 xunloadfonts(void) {
2581 int i, ip;
2582
2583 /*
2584 * Free the loaded fonts in the font cache. This is done backwards
2585 * from the frccur.
2586 */
2587 for(i = 0, ip = frccur; i < frclen; i++, ip--) {
2588 if(ip < 0)
2589 ip = LEN(frc) - 1;
2590 XftFontClose(xw.dpy, frc[ip].font);
2591 }
2592 frccur = -1;
2593 frclen = 0;
2594
2595 XftFontClose(xw.dpy, dc.font.match);
2596 FcPatternDestroy(dc.font.pattern);
2597 FcFontSetDestroy(dc.font.set);
2598 XftFontClose(xw.dpy, dc.bfont.match);
2599 FcPatternDestroy(dc.bfont.pattern);
2600 FcFontSetDestroy(dc.bfont.set);
2601 XftFontClose(xw.dpy, dc.ifont.match);
2602 FcPatternDestroy(dc.ifont.pattern);
2603 FcFontSetDestroy(dc.ifont.set);
2604 XftFontClose(xw.dpy, dc.ibfont.match);
2605 FcPatternDestroy(dc.ibfont.pattern);
2606 FcFontSetDestroy(dc.ibfont.set);
2607 }
2608
2609 void
2610 xzoom(const Arg *arg) {
2611 xunloadfonts();
2612 xloadfonts(usedfont, usedfontsize + arg->i);
2613 cresize(0, 0);
2614 redraw(0);
2615 }
2616
2617 void
2618 xinit(void) {
2619 XSetWindowAttributes attrs;
2620 XGCValues gcvalues;
2621 Cursor cursor;
2622 Window parent;
2623 int sw, sh, major, minor;
2624
2625 if(!(xw.dpy = XOpenDisplay(NULL)))
2626 die("Can't open display\n");
2627 xw.scr = XDefaultScreen(xw.dpy);
2628 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2629
2630 /* font */
2631 if(!FcInit())
2632 die("Could not init fontconfig.\n");
2633
2634 usedfont = (opt_font == NULL)? font : opt_font;
2635 xloadfonts(usedfont, 0);
2636
2637 /* colors */
2638 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2639 xloadcols();
2640
2641 /* adjust fixed window geometry */
2642 if(xw.isfixed) {
2643 sw = DisplayWidth(xw.dpy, xw.scr);
2644 sh = DisplayHeight(xw.dpy, xw.scr);
2645 if(xw.fx < 0)
2646 xw.fx = sw + xw.fx - xw.fw - 1;
2647 if(xw.fy < 0)
2648 xw.fy = sh + xw.fy - xw.fh - 1;
2649
2650 xw.h = xw.fh;
2651 xw.w = xw.fw;
2652 } else {
2653 /* window - default size */
2654 xw.h = 2 * borderpx + term.row * xw.ch;
2655 xw.w = 2 * borderpx + term.col * xw.cw;
2656 xw.fx = 0;
2657 xw.fy = 0;
2658 }
2659
2660 /* Events */
2661 attrs.background_pixel = dc.col[defaultbg].pixel;
2662 attrs.border_pixel = dc.col[defaultbg].pixel;
2663 attrs.bit_gravity = NorthWestGravity;
2664 attrs.event_mask = FocusChangeMask | KeyPressMask
2665 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2666 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2667 attrs.colormap = xw.cmap;
2668
2669 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2670 XRootWindow(xw.dpy, xw.scr);
2671 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2672 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2673 xw.vis,
2674 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2675 | CWColormap,
2676 &attrs);
2677
2678 /* double buffering */
2679 /*
2680 if(XdbeQueryExtension(xw.dpy, &major, &minor)) {
2681 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win,
2682 XdbeBackground);
2683 usedbe = True;
2684 } else {
2685 */
2686 memset(&gcvalues, 0, sizeof(gcvalues));
2687 gcvalues.graphics_exposures = False;
2688 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2689 &gcvalues);
2690 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2691 DefaultDepth(xw.dpy, xw.scr));
2692 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2693 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2694 //xw.buf = xw.win;
2695 /*
2696 }
2697 */
2698
2699 /* Xft rendering context */
2700 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2701
2702 /* input methods */
2703 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2704 XSetLocaleModifiers("@im=local");
2705 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2706 XSetLocaleModifiers("@im=");
2707 if((xw.xim = XOpenIM(xw.dpy,
2708 NULL, NULL, NULL)) == NULL) {
2709 die("XOpenIM failed. Could not open input"
2710 " device.\n");
2711 }
2712 }
2713 }
2714 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2715 | XIMStatusNothing, XNClientWindow, xw.win,
2716 XNFocusWindow, xw.win, NULL);
2717 if(xw.xic == NULL)
2718 die("XCreateIC failed. Could not obtain input method.\n");
2719
2720 /* white cursor, black outline */
2721 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2722 XDefineCursor(xw.dpy, xw.win, cursor);
2723 XRecolorCursor(xw.dpy, cursor,
2724 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2725 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2726
2727 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2728 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2729 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2730
2731 xresettitle();
2732 XMapWindow(xw.dpy, xw.win);
2733 xhints();
2734 XSync(xw.dpy, 0);
2735 }
2736
2737 void
2738 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2739 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2740 width = charlen * xw.cw, xp, i;
2741 int frp, frcflags;
2742 int u8fl, u8fblen, u8cblen, doesexist;
2743 char *u8c, *u8fs;
2744 long u8char;
2745 Font *font = &dc.font;
2746 FcResult fcres;
2747 FcPattern *fcpattern, *fontpattern;
2748 FcFontSet *fcsets[] = { NULL };
2749 FcCharSet *fccharset;
2750 Colour *fg = &dc.col[base.fg], *bg = &dc.col[base.bg],
2751 *temp, revfg, revbg;
2752 XRenderColor colfg, colbg;
2753
2754 frcflags = FRC_NORMAL;
2755
2756 if(base.mode & ATTR_BOLD) {
2757 if(BETWEEN(base.fg, 0, 7)) {
2758 /* basic system colors */
2759 fg = &dc.col[base.fg + 8];
2760 } else if(BETWEEN(base.fg, 16, 195)) {
2761 /* 256 colors */
2762 fg = &dc.col[base.fg + 36];
2763 } else if(BETWEEN(base.fg, 232, 251)) {
2764 /* greyscale */
2765 fg = &dc.col[base.fg + 4];
2766 }
2767 /*
2768 * Those ranges will not be brightened:
2769 * 8 - 15 – bright system colors
2770 * 196 - 231 – highest 256 color cube
2771 * 252 - 255 – brightest colors in greyscale
2772 */
2773 font = &dc.bfont;
2774 frcflags = FRC_BOLD;
2775 }
2776
2777 if(base.mode & ATTR_ITALIC) {
2778 font = &dc.ifont;
2779 frcflags = FRC_ITALIC;
2780 }
2781 if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2782 font = &dc.ibfont;
2783 frcflags = FRC_ITALICBOLD;
2784 }
2785
2786 if(IS_SET(MODE_REVERSE)) {
2787 if(fg == &dc.col[defaultfg]) {
2788 fg = &dc.col[defaultbg];
2789 } else {
2790 colfg.red = ~fg->color.red;
2791 colfg.green = ~fg->color.green;
2792 colfg.blue = ~fg->color.blue;
2793 colfg.alpha = fg->color.alpha;
2794 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2795 fg = &revfg;
2796 }
2797
2798 if(bg == &dc.col[defaultbg]) {
2799 bg = &dc.col[defaultfg];
2800 } else {
2801 colbg.red = ~bg->color.red;
2802 colbg.green = ~bg->color.green;
2803 colbg.blue = ~bg->color.blue;
2804 colbg.alpha = bg->color.alpha;
2805 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2806 bg = &revbg;
2807 }
2808 }
2809
2810 if(base.mode & ATTR_REVERSE) {
2811 temp = fg;
2812 fg = bg;
2813 bg = temp;
2814 }
2815
2816 /* Intelligent cleaning up of the borders. */
2817 if(x == 0) {
2818 xclear(0, (y == 0)? 0 : winy, borderpx,
2819 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2820 }
2821 if(x + charlen >= term.col) {
2822 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2823 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2824 }
2825 if(y == 0)
2826 xclear(winx, 0, winx + width, borderpx);
2827 if(y == term.row-1)
2828 xclear(winx, winy + xw.ch, winx + width, xw.h);
2829
2830 /* Clean up the region we want to draw to. */
2831 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2832
2833 fcsets[0] = font->set;
2834 for(xp = winx; bytelen > 0;) {
2835 /*
2836 * Search for the range in the to be printed string of glyphs
2837 * that are in the main font. Then print that range. If
2838 * some glyph is found that is not in the font, do the
2839 * fallback dance.
2840 */
2841 u8fs = s;
2842 u8fblen = 0;
2843 u8fl = 0;
2844 for(;;) {
2845 u8c = s;
2846 u8cblen = utf8decode(s, &u8char);
2847 s += u8cblen;
2848 bytelen -= u8cblen;
2849
2850 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
2851 if(!doesexist || bytelen <= 0) {
2852 if(bytelen <= 0) {
2853 if(doesexist) {
2854 u8fl++;
2855 u8fblen += u8cblen;
2856 }
2857 }
2858
2859 if(u8fl > 0) {
2860 XftDrawStringUtf8(xw.draw, fg,
2861 font->match, xp,
2862 winy + font->ascent,
2863 (FcChar8 *)u8fs,
2864 u8fblen);
2865 xp += font->width * u8fl;
2866 }
2867 break;
2868 }
2869
2870 u8fl++;
2871 u8fblen += u8cblen;
2872 }
2873 if(doesexist)
2874 break;
2875
2876 frp = frccur;
2877 /* Search the font cache. */
2878 for(i = 0; i < frclen; i++, frp--) {
2879 if(frp <= 0)
2880 frp = LEN(frc) - 1;
2881
2882 if(frc[frp].c == u8char
2883 && frc[frp].flags == frcflags) {
2884 break;
2885 }
2886 }
2887
2888 /* Nothing was found. */
2889 if(i >= frclen) {
2890 /*
2891 * Nothing was found in the cache. Now use
2892 * some dozen of Fontconfig calls to get the
2893 * font for one single character.
2894 */
2895 fcpattern = FcPatternDuplicate(font->pattern);
2896 fccharset = FcCharSetCreate();
2897
2898 FcCharSetAddChar(fccharset, u8char);
2899 FcPatternAddCharSet(fcpattern, FC_CHARSET,
2900 fccharset);
2901 FcPatternAddBool(fcpattern, FC_SCALABLE,
2902 FcTrue);
2903
2904 FcConfigSubstitute(0, fcpattern,
2905 FcMatchPattern);
2906 FcDefaultSubstitute(fcpattern);
2907
2908 fontpattern = FcFontSetMatch(0, fcsets,
2909 FcTrue, fcpattern, &fcres);
2910
2911 /*
2912 * Overwrite or create the new cache entry
2913 * entry.
2914 */
2915 frccur++;
2916 frclen++;
2917 if(frccur >= LEN(frc))
2918 frccur = 0;
2919 if(frclen > LEN(frc)) {
2920 frclen = LEN(frc);
2921 XftFontClose(xw.dpy, frc[frccur].font);
2922 }
2923
2924 frc[frccur].font = XftFontOpenPattern(xw.dpy,
2925 fontpattern);
2926 frc[frccur].c = u8char;
2927 frc[frccur].flags = frcflags;
2928
2929 FcPatternDestroy(fcpattern);
2930 FcCharSetDestroy(fccharset);
2931
2932 frp = frccur;
2933 }
2934
2935 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
2936 xp, winy + frc[frp].font->ascent,
2937 (FcChar8 *)u8c, u8cblen);
2938
2939 xp += font->width;
2940 }
2941
2942 /*
2943 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
2944 winy + font->ascent, (FcChar8 *)s, bytelen);
2945 */
2946
2947 if(base.mode & ATTR_UNDERLINE) {
2948 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
2949 width, 1);
2950 }
2951 }
2952
2953 void
2954 xdrawcursor(void) {
2955 static int oldx = 0, oldy = 0;
2956 int sl;
2957 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs, 0};
2958
2959 LIMIT(oldx, 0, term.col-1);
2960 LIMIT(oldy, 0, term.row-1);
2961
2962 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2963 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2964
2965 /* remove the old cursor */
2966 if(term.line[oldy][oldx].state & GLYPH_SET) {
2967 sl = utf8size(term.line[oldy][oldx].c);
2968 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2969 oldy, 1, sl);
2970 } else {
2971 xtermclear(oldx, oldy, oldx, oldy);
2972 }
2973
2974 /* draw the new one */
2975 if(!(IS_SET(MODE_HIDE))) {
2976 if(!(xw.state & WIN_FOCUSED))
2977 g.bg = defaultucs;
2978
2979 if(IS_SET(MODE_REVERSE))
2980 g.mode |= ATTR_REVERSE, g.fg = defaultcs, g.bg = defaultfg;
2981
2982 sl = utf8size(g.c);
2983 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2984 oldx = term.c.x, oldy = term.c.y;
2985 }
2986 }
2987
2988 void
2989 xresettitle(void) {
2990 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
2991 }
2992
2993 void
2994 redraw(int timeout) {
2995 struct timespec tv = {0, timeout * 1000};
2996
2997 tfulldirt();
2998 draw();
2999
3000 if(timeout > 0) {
3001 nanosleep(&tv, NULL);
3002 XSync(xw.dpy, False); /* necessary for a good tput flash */
3003 }
3004 }
3005
3006 void
3007 draw(void) {
3008 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
3009
3010 drawregion(0, 0, term.col, term.row);
3011 if(usedbe) {
3012 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
3013 } else {
3014 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3015 xw.h, 0, 0);
3016 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg].pixel);
3017 }
3018 }
3019
3020 void
3021 drawregion(int x1, int y1, int x2, int y2) {
3022 int ic, ib, x, y, ox, sl;
3023 Glyph base, new;
3024 char buf[DRAW_BUF_SIZ];
3025 bool ena_sel = sel.bx != -1;
3026
3027 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3028 ena_sel = 0;
3029
3030 if(!(xw.state & WIN_VISIBLE))
3031 return;
3032
3033 for(y = y1; y < y2; y++) {
3034 if(!term.dirty[y])
3035 continue;
3036
3037 xtermclear(0, y, term.col, y);
3038 term.dirty[y] = 0;
3039 base = term.line[y][0];
3040 ic = ib = ox = 0;
3041 for(x = x1; x < x2; x++) {
3042 new = term.line[y][x];
3043 if(ena_sel && *(new.c) && selected(x, y))
3044 new.mode ^= ATTR_REVERSE;
3045 if(ib > 0 && (!(new.state & GLYPH_SET)
3046 || ATTRCMP(base, new)
3047 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3048 xdraws(buf, base, ox, y, ic, ib);
3049 ic = ib = 0;
3050 }
3051 if(new.state & GLYPH_SET) {
3052 if(ib == 0) {
3053 ox = x;
3054 base = new;
3055 }
3056
3057 sl = utf8size(new.c);
3058 memcpy(buf+ib, new.c, sl);
3059 ib += sl;
3060 ++ic;
3061 }
3062 }
3063 if(ib > 0)
3064 xdraws(buf, base, ox, y, ic, ib);
3065 }
3066 xdrawcursor();
3067 }
3068
3069 void
3070 expose(XEvent *ev) {
3071 XExposeEvent *e = &ev->xexpose;
3072
3073 if(xw.state & WIN_REDRAW) {
3074 if(!e->count)
3075 xw.state &= ~WIN_REDRAW;
3076 }
3077 redraw(0);
3078 }
3079
3080 void
3081 visibility(XEvent *ev) {
3082 XVisibilityEvent *e = &ev->xvisibility;
3083
3084 if(e->state == VisibilityFullyObscured) {
3085 xw.state &= ~WIN_VISIBLE;
3086 } else if(!(xw.state & WIN_VISIBLE)) {
3087 /* need a full redraw for next Expose, not just a buf copy */
3088 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3089 }
3090 }
3091
3092 void
3093 unmap(XEvent *ev) {
3094 xw.state &= ~WIN_VISIBLE;
3095 }
3096
3097 void
3098 xseturgency(int add) {
3099 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3100
3101 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3102 XSetWMHints(xw.dpy, xw.win, h);
3103 XFree(h);
3104 }
3105
3106 void
3107 focus(XEvent *ev) {
3108 XFocusChangeEvent *e = &ev->xfocus;
3109
3110 if(e->mode == NotifyGrab)
3111 return;
3112
3113 if(ev->type == FocusIn) {
3114 XSetICFocus(xw.xic);
3115 xw.state |= WIN_FOCUSED;
3116 xseturgency(0);
3117 } else {
3118 XUnsetICFocus(xw.xic);
3119 xw.state &= ~WIN_FOCUSED;
3120 }
3121 }
3122
3123 inline bool
3124 match(uint mask, uint state) {
3125 state &= ~(ignoremod);
3126
3127 if(mask == XK_NO_MOD && state)
3128 return false;
3129 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3130 return false;
3131 if((state & mask) != state)
3132 return false;
3133 return true;
3134 }
3135
3136 void
3137 numlock(const Arg *dummy) {
3138 term.numlock ^= 1;
3139 }
3140
3141 char*
3142 kmap(KeySym k, uint state) {
3143 uint mask;
3144 Key *kp;
3145 int i;
3146
3147 /* Check for mapped keys out of X11 function keys. */
3148 for(i = 0; i < LEN(mappedkeys); i++) {
3149 if(mappedkeys[i] == k)
3150 break;
3151 }
3152 if(i == LEN(mappedkeys)) {
3153 if((k & 0xFFFF) < 0xFD00)
3154 return NULL;
3155 }
3156
3157 for(kp = key; kp < key + LEN(key); kp++) {
3158 mask = kp->mask;
3159
3160 if(kp->k != k)
3161 continue;
3162
3163 if(!match(mask, state))
3164 continue;
3165
3166 if(kp->appkey > 0) {
3167 if(!IS_SET(MODE_APPKEYPAD))
3168 continue;
3169 if(term.numlock && kp->appkey == 2)
3170 continue;
3171 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3172 continue;
3173 }
3174
3175 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3176 (kp->appcursor > 0
3177 && !IS_SET(MODE_APPCURSOR))) {
3178 continue;
3179 }
3180
3181 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3182 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3183 continue;
3184 }
3185
3186 return kp->s;
3187 }
3188
3189 return NULL;
3190 }
3191
3192 void
3193 kpress(XEvent *ev) {
3194 XKeyEvent *e = &ev->xkey;
3195 KeySym ksym;
3196 char xstr[31], buf[32], *customkey, *cp = buf;
3197 int len;
3198 Status status;
3199 Shortcut *bp;
3200
3201 if(IS_SET(MODE_KBDLOCK))
3202 return;
3203
3204 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3205 e->state &= ~Mod2Mask;
3206 /* 1. shortcuts */
3207 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3208 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3209 bp->func(&(bp->arg));
3210 return;
3211 }
3212 }
3213
3214 /* 2. custom keys from config.h */
3215 if((customkey = kmap(ksym, e->state))) {
3216 len = strlen(customkey);
3217 memcpy(buf, customkey, len);
3218 /* 2. hardcoded (overrides X lookup) */
3219 } else {
3220 if(len == 0)
3221 return;
3222
3223 if(len == 1 && e->state & Mod1Mask)
3224 *cp++ = '\033';
3225
3226 memcpy(cp, xstr, len);
3227 len = cp - buf + len;
3228 }
3229
3230 ttywrite(buf, len);
3231 if(IS_SET(MODE_ECHO))
3232 techo(buf, len);
3233 }
3234
3235
3236 void
3237 cmessage(XEvent *e) {
3238 /*
3239 * See xembed specs
3240 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3241 */
3242 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3243 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3244 xw.state |= WIN_FOCUSED;
3245 xseturgency(0);
3246 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3247 xw.state &= ~WIN_FOCUSED;
3248 }
3249 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3250 /* Send SIGHUP to shell */
3251 kill(pid, SIGHUP);
3252 exit(EXIT_SUCCESS);
3253 }
3254 }
3255
3256 void
3257 cresize(int width, int height) {
3258 int col, row;
3259
3260 if(width != 0)
3261 xw.w = width;
3262 if(height != 0)
3263 xw.h = height;
3264
3265 col = (xw.w - 2 * borderpx) / xw.cw;
3266 row = (xw.h - 2 * borderpx) / xw.ch;
3267
3268 tresize(col, row);
3269 xresize(col, row);
3270 ttyresize();
3271 }
3272
3273 void
3274 resize(XEvent *e) {
3275 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3276 return;
3277
3278 cresize(e->xconfigure.width, e->xconfigure.height);
3279 }
3280
3281 void
3282 run(void) {
3283 XEvent ev;
3284 fd_set rfd;
3285 int xfd = XConnectionNumber(xw.dpy), xev;
3286 struct timeval drawtimeout, *tv = NULL, now, last;
3287
3288 gettimeofday(&last, NULL);
3289
3290 for(xev = actionfps;;) {
3291 FD_ZERO(&rfd);
3292 FD_SET(cmdfd, &rfd);
3293 FD_SET(xfd, &rfd);
3294 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3295 if(errno == EINTR)
3296 continue;
3297 die("select failed: %s\n", SERRNO);
3298 }
3299
3300 gettimeofday(&now, NULL);
3301 drawtimeout.tv_sec = 0;
3302 drawtimeout.tv_usec = (1000/xfps) * 1000;
3303 tv = &drawtimeout;
3304
3305 if(FD_ISSET(cmdfd, &rfd))
3306 ttyread();
3307
3308 if(FD_ISSET(xfd, &rfd))
3309 xev = actionfps;
3310
3311 if(TIMEDIFF(now, last) > \
3312 (xev ? (1000/xfps) : (1000/actionfps))) {
3313 while(XPending(xw.dpy)) {
3314 XNextEvent(xw.dpy, &ev);
3315 if(XFilterEvent(&ev, None))
3316 continue;
3317 if(handler[ev.type])
3318 (handler[ev.type])(&ev);
3319 }
3320
3321 draw();
3322 XFlush(xw.dpy);
3323 last = now;
3324
3325 if(xev && !FD_ISSET(xfd, &rfd))
3326 xev--;
3327 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd))
3328 tv = NULL;
3329 }
3330 }
3331 }
3332
3333 int
3334 main(int argc, char *argv[]) {
3335 int i, bitm, xr, yr;
3336 uint wr, hr;
3337
3338 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3339 xw.isfixed = False;
3340
3341 for(i = 1; i < argc; i++) {
3342 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
3343 case 'c':
3344 if(++i < argc)
3345 opt_class = argv[i];
3346 break;
3347 case 'e':
3348 /* eat all remaining arguments */
3349 if(++i < argc)
3350 opt_cmd = &argv[i];
3351 goto run;
3352 case 'f':
3353 if(++i < argc)
3354 opt_font = argv[i];
3355 break;
3356 case 'g':
3357 if(++i >= argc)
3358 break;
3359
3360 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
3361 if(bitm & XValue)
3362 xw.fx = xr;
3363 if(bitm & YValue)
3364 xw.fy = yr;
3365 if(bitm & WidthValue)
3366 xw.fw = (int)wr;
3367 if(bitm & HeightValue)
3368 xw.fh = (int)hr;
3369 if(bitm & XNegative && xw.fx == 0)
3370 xw.fx = -1;
3371 if(bitm & XNegative && xw.fy == 0)
3372 xw.fy = -1;
3373
3374 if(xw.fh != 0 && xw.fw != 0)
3375 xw.isfixed = True;
3376 break;
3377 case 'o':
3378 if(++i < argc)
3379 opt_io = argv[i];
3380 break;
3381 case 't':
3382 if(++i < argc)
3383 opt_title = argv[i];
3384 break;
3385 case 'v':
3386 default:
3387 die(USAGE);
3388 case 'w':
3389 if(++i < argc)
3390 opt_embed = argv[i];
3391 break;
3392 }
3393 }
3394
3395 run:
3396 setlocale(LC_CTYPE, "");
3397 XSetLocaleModifiers("");
3398 tnew(80, 24);
3399 xinit();
3400 ttynew();
3401 selinit();
3402 run();
3403
3404 return 0;
3405 }
3406