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7ddce0cb5104ba2bce3a7aa5d298273d542f995b
[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/Xft/Xft.h>
29 #include <fontconfig/fontconfig.h>
30
31 #define Glyph Glyph_
32 #define Font Font_
33 #define Draw XftDraw *
34 #define Colour XftColor
35 #define Colourmap Colormap
36
37 #if defined(__linux)
38 #include <pty.h>
39 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
40 #include <util.h>
41 #elif defined(__FreeBSD__) || defined(__DragonFly__)
42 #include <libutil.h>
43 #endif
44
45 #define USAGE \
46 "st " VERSION " (c) 2010-2013 st engineers\n" \
47 "usage: st [-v] [-c class] [-f font] [-g geometry] [-o file]" \
48 " [-t title] [-w windowid] [-e command ...]\n"
49
50 /* XEMBED messages */
51 #define XEMBED_FOCUS_IN 4
52 #define XEMBED_FOCUS_OUT 5
53
54 /* Arbitrary sizes */
55 #define UTF_SIZ 4
56 #define ESC_BUF_SIZ (128*UTF_SIZ)
57 #define ESC_ARG_SIZ 16
58 #define STR_BUF_SIZ ESC_BUF_SIZ
59 #define STR_ARG_SIZ ESC_ARG_SIZ
60 #define DRAW_BUF_SIZ 20*1024
61 #define XK_ANY_MOD UINT_MAX
62 #define XK_NO_MOD 0
63 #define XK_SWITCH_MOD (1<<13)
64
65 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
66
67 /* macros */
68 #define SERRNO strerror(errno)
69 #define MIN(a, b) ((a) < (b) ? (a) : (b))
70 #define MAX(a, b) ((a) < (b) ? (b) : (a))
71 #define LEN(a) (sizeof(a) / sizeof(a[0]))
72 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
73 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
74 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
75 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
76 #define IS_SET(flag) ((term.mode & (flag)) != 0)
77 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
78
79 #define VT102ID "\033[?6c"
80
81 enum glyph_attribute {
82 ATTR_NULL = 0,
83 ATTR_REVERSE = 1,
84 ATTR_UNDERLINE = 2,
85 ATTR_BOLD = 4,
86 ATTR_GFX = 8,
87 ATTR_ITALIC = 16,
88 ATTR_BLINK = 32,
89 };
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 glyph_state {
103 GLYPH_SET = 1,
104 GLYPH_DIRTY = 2
105 };
106
107 enum term_mode {
108 MODE_WRAP = 1,
109 MODE_INSERT = 2,
110 MODE_APPKEYPAD = 4,
111 MODE_ALTSCREEN = 8,
112 MODE_CRLF = 16,
113 MODE_MOUSEBTN = 32,
114 MODE_MOUSEMOTION = 64,
115 MODE_MOUSE = 32|64,
116 MODE_REVERSE = 128,
117 MODE_KBDLOCK = 256,
118 MODE_HIDE = 512,
119 MODE_ECHO = 1024,
120 MODE_APPCURSOR = 2048,
121 MODE_MOUSESGR = 4096,
122 };
123
124 enum escape_state {
125 ESC_START = 1,
126 ESC_CSI = 2,
127 ESC_STR = 4, /* DSC, OSC, PM, APC */
128 ESC_ALTCHARSET = 8,
129 ESC_STR_END = 16, /* a final string was encountered */
130 ESC_TEST = 32, /* Enter in test mode */
131 };
132
133 enum window_state {
134 WIN_VISIBLE = 1,
135 WIN_REDRAW = 2,
136 WIN_FOCUSED = 4
137 };
138
139 enum selection_type {
140 SEL_REGULAR = 1,
141 SEL_RECTANGULAR = 2
142 };
143
144 /* bit macro */
145 #undef B0
146 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
147
148 typedef unsigned char uchar;
149 typedef unsigned int uint;
150 typedef unsigned long ulong;
151 typedef unsigned short ushort;
152
153 typedef struct {
154 char c[UTF_SIZ]; /* character code */
155 uchar mode; /* attribute flags */
156 ushort fg; /* foreground */
157 ushort bg; /* background */
158 uchar state; /* state flags */
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 bx, by;
243 int ex, ey;
244 struct {
245 int x, y;
246 } b, e;
247 char *clip;
248 Atom xtarget;
249 bool alt;
250 struct timeval tclick1;
251 struct timeval tclick2;
252 } Selection;
253
254 typedef union {
255 int i;
256 unsigned int ui;
257 float f;
258 const void *v;
259 } Arg;
260
261 typedef struct {
262 unsigned int mod;
263 KeySym keysym;
264 void (*func)(const Arg *);
265 const Arg arg;
266 } Shortcut;
267
268 /* function definitions used in config.h */
269 static void clippaste(const Arg *);
270 static void numlock(const Arg *);
271 static void selpaste(const Arg *);
272 static void xzoom(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 void csidump(void);
306 static void csihandle(void);
307 static void csiparse(void);
308 static void csireset(void);
309 static void strdump(void);
310 static void strhandle(void);
311 static void strparse(void);
312 static void strreset(void);
313
314 static void tclearregion(int, int, int, int, int);
315 static void tcursor(int);
316 static void tdeletechar(int);
317 static void tdeleteline(int);
318 static void tinsertblank(int);
319 static void tinsertblankline(int);
320 static void tmoveto(int, int);
321 static void tmoveato(int x, int y);
322 static void tnew(int, int);
323 static void tnewline(int);
324 static void tputtab(bool);
325 static void tputc(char *, int);
326 static void treset(void);
327 static int tresize(int, int);
328 static void tscrollup(int, int);
329 static void tscrolldown(int, int);
330 static void tsetattr(int*, int);
331 static void tsetchar(char *, Glyph *, int, int);
332 static void tsetscroll(int, int);
333 static void tswapscreen(void);
334 static void tsetdirt(int, int);
335 static void tsetmode(bool, bool, int *, int);
336 static void tfulldirt(void);
337 static void techo(char *, int);
338
339 static inline bool match(uint, uint);
340 static void ttynew(void);
341 static void ttyread(void);
342 static void ttyresize(void);
343 static void ttywrite(const char *, size_t);
344
345 static void xdraws(char *, Glyph, int, int, int, int);
346 static void xhints(void);
347 static void xclear(int, int, int, int);
348 static void xdrawcursor(void);
349 static void xinit(void);
350 static void xloadcols(void);
351 static int xsetcolorname(int, const char *);
352 static int xloadfont(Font *, FcPattern *);
353 static void xloadfonts(char *, int);
354 static void xsettitle(char *);
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 static char *usedfont = NULL;
428 static int usedfontsize = 0;
429
430 /* Font Ring Cache */
431 enum {
432 FRC_NORMAL,
433 FRC_ITALIC,
434 FRC_BOLD,
435 FRC_ITALICBOLD
436 };
437
438 typedef struct {
439 XftFont *font;
440 long c;
441 int flags;
442 } Fontcache;
443
444 /*
445 * Fontcache is a ring buffer, with frccur as current position and frclen as
446 * the current length of used elements.
447 */
448
449 static Fontcache frc[1024];
450 static int frccur = -1, frclen = 0;
451
452 ssize_t
453 xwrite(int fd, char *s, size_t len) {
454 size_t aux = len;
455
456 while(len > 0) {
457 ssize_t r = write(fd, s, len);
458 if(r < 0)
459 return r;
460 len -= r;
461 s += r;
462 }
463 return aux;
464 }
465
466 void *
467 xmalloc(size_t len) {
468 void *p = malloc(len);
469
470 if(!p)
471 die("Out of memory\n");
472
473 return p;
474 }
475
476 void *
477 xrealloc(void *p, size_t len) {
478 if((p = realloc(p, len)) == NULL)
479 die("Out of memory\n");
480
481 return p;
482 }
483
484 void *
485 xcalloc(size_t nmemb, size_t size) {
486 void *p = calloc(nmemb, size);
487
488 if(!p)
489 die("Out of memory\n");
490
491 return p;
492 }
493
494 int
495 utf8decode(char *s, long *u) {
496 uchar c;
497 int i, n, rtn;
498
499 rtn = 1;
500 c = *s;
501 if(~c & B7) { /* 0xxxxxxx */
502 *u = c;
503 return rtn;
504 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
505 *u = c&(B4|B3|B2|B1|B0);
506 n = 1;
507 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
508 *u = c&(B3|B2|B1|B0);
509 n = 2;
510 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
511 *u = c & (B2|B1|B0);
512 n = 3;
513 } else {
514 goto invalid;
515 }
516
517 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
518 c = *s;
519 if((c & (B7|B6)) != B7) /* 10xxxxxx */
520 goto invalid;
521 *u <<= 6;
522 *u |= c & (B5|B4|B3|B2|B1|B0);
523 }
524
525 if((n == 1 && *u < 0x80) ||
526 (n == 2 && *u < 0x800) ||
527 (n == 3 && *u < 0x10000) ||
528 (*u >= 0xD800 && *u <= 0xDFFF)) {
529 goto invalid;
530 }
531
532 return rtn;
533 invalid:
534 *u = 0xFFFD;
535
536 return rtn;
537 }
538
539 int
540 utf8encode(long *u, char *s) {
541 uchar *sp;
542 ulong uc;
543 int i, n;
544
545 sp = (uchar *)s;
546 uc = *u;
547 if(uc < 0x80) {
548 *sp = uc; /* 0xxxxxxx */
549 return 1;
550 } else if(*u < 0x800) {
551 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
552 n = 1;
553 } else if(uc < 0x10000) {
554 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
555 n = 2;
556 } else if(uc <= 0x10FFFF) {
557 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
558 n = 3;
559 } else {
560 goto invalid;
561 }
562
563 for(i=n,++sp; i>0; --i,++sp)
564 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
565
566 return n+1;
567 invalid:
568 /* U+FFFD */
569 *s++ = '\xEF';
570 *s++ = '\xBF';
571 *s = '\xBD';
572
573 return 3;
574 }
575
576 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
577 UTF-8 otherwise return 0 */
578 int
579 isfullutf8(char *s, int b) {
580 uchar *c1, *c2, *c3;
581
582 c1 = (uchar *)s;
583 c2 = (uchar *)++s;
584 c3 = (uchar *)++s;
585 if(b < 1) {
586 return 0;
587 } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
588 return 0;
589 } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
590 ((b == 1) ||
591 ((b == 2) && (*c2&(B7|B6)) == B7))) {
592 return 0;
593 } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
594 ((b == 1) ||
595 ((b == 2) && (*c2&(B7|B6)) == B7) ||
596 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
597 return 0;
598 } else {
599 return 1;
600 }
601 }
602
603 int
604 utf8size(char *s) {
605 uchar c = *s;
606
607 if(~c&B7) {
608 return 1;
609 } else if((c&(B7|B6|B5)) == (B7|B6)) {
610 return 2;
611 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
612 return 3;
613 } else {
614 return 4;
615 }
616 }
617
618 void
619 selinit(void) {
620 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
621 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
622 sel.mode = 0;
623 sel.bx = -1;
624 sel.clip = NULL;
625 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
626 if(sel.xtarget == None)
627 sel.xtarget = XA_STRING;
628 }
629
630 static int
631 x2col(int x) {
632 x -= borderpx;
633 x /= xw.cw;
634
635 return LIMIT(x, 0, term.col-1);
636 }
637
638 static int
639 y2row(int y) {
640 y -= borderpx;
641 y /= xw.ch;
642
643 return LIMIT(y, 0, term.row-1);
644 }
645
646 static inline bool
647 selected(int x, int y) {
648 int bx, ex;
649
650 if(sel.ey == y && sel.by == y) {
651 bx = MIN(sel.bx, sel.ex);
652 ex = MAX(sel.bx, sel.ex);
653 return BETWEEN(x, bx, ex);
654 }
655
656 return ((sel.b.y < y && y < sel.e.y)
657 || (y == sel.e.y && x <= sel.e.x))
658 || (y == sel.b.y && x >= sel.b.x
659 && (x <= sel.e.x || sel.b.y != sel.e.y));
660 switch(sel.type) {
661 case SEL_REGULAR:
662 return ((sel.b.y < y && y < sel.e.y)
663 || (y == sel.e.y && x <= sel.e.x))
664 || (y == sel.b.y && x >= sel.b.x
665 && (x <= sel.e.x || sel.b.y != sel.e.y));
666 case SEL_RECTANGULAR:
667 return ((sel.b.y <= y && y <= sel.e.y)
668 && (sel.b.x <= x && x <= sel.e.x));
669 };
670 }
671
672 void
673 getbuttoninfo(XEvent *e) {
674 int type;
675 uint state = e->xbutton.state &~Button1Mask;
676
677 sel.alt = IS_SET(MODE_ALTSCREEN);
678
679 sel.ex = x2col(e->xbutton.x);
680 sel.ey = y2row(e->xbutton.y);
681
682 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
683 sel.b.y = MIN(sel.by, sel.ey);
684 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
685 sel.e.y = MAX(sel.by, sel.ey);
686
687 sel.type = SEL_REGULAR;
688 for(type = 1; type < LEN(selmasks); ++type) {
689 if(match(selmasks[type], state)) {
690 sel.type = type;
691 break;
692 }
693 }
694 }
695
696 void
697 mousereport(XEvent *e) {
698 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
699 button = e->xbutton.button, state = e->xbutton.state,
700 len;
701 char buf[40];
702 static int ob, ox, oy;
703
704 /* from urxvt */
705 if(e->xbutton.type == MotionNotify) {
706 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
707 return;
708 button = ob + 32;
709 ox = x, oy = y;
710 } else if(!IS_SET(MODE_MOUSESGR)
711 && (e->xbutton.type == ButtonRelease
712 || button == AnyButton)) {
713 button = 3;
714 } else {
715 button -= Button1;
716 if(button >= 3)
717 button += 64 - 3;
718 if(e->xbutton.type == ButtonPress) {
719 ob = button;
720 ox = x, oy = y;
721 }
722 }
723
724 button += (state & ShiftMask ? 4 : 0)
725 + (state & Mod4Mask ? 8 : 0)
726 + (state & ControlMask ? 16 : 0);
727
728 len = 0;
729 if(IS_SET(MODE_MOUSESGR)) {
730 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
731 button, x+1, y+1,
732 e->xbutton.type == ButtonRelease ? 'm' : 'M');
733 } else if(x < 223 && y < 223) {
734 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
735 32+button, 32+x+1, 32+y+1);
736 } else {
737 return;
738 }
739
740 ttywrite(buf, len);
741 }
742
743 void
744 bpress(XEvent *e) {
745 if(IS_SET(MODE_MOUSE)) {
746 mousereport(e);
747 } else if(e->xbutton.button == Button1) {
748 if(sel.bx != -1) {
749 sel.bx = -1;
750 tsetdirt(sel.b.y, sel.e.y);
751 draw();
752 }
753 sel.mode = 1;
754 sel.type = SEL_REGULAR;
755 sel.ex = sel.bx = x2col(e->xbutton.x);
756 sel.ey = sel.by = y2row(e->xbutton.y);
757 } else if(e->xbutton.button == Button4) {
758 ttywrite("\031", 1);
759 } else if(e->xbutton.button == Button5) {
760 ttywrite("\005", 1);
761 }
762 }
763
764 void
765 selcopy(void) {
766 char *str, *ptr, *p;
767 int x, y, bufsize, is_selected = 0, size;
768 Glyph *gp, *last;
769
770 if(sel.bx == -1) {
771 str = NULL;
772 } else {
773 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
774 ptr = str = xmalloc(bufsize);
775
776 /* append every set & selected glyph to the selection */
777 for(y = sel.b.y; y < sel.e.y + 1; y++) {
778 is_selected = 0;
779 gp = &term.line[y][0];
780 last = gp + term.col;
781
782 while(--last >= gp && !(last->state & GLYPH_SET))
783 /* nothing */;
784
785 for(x = 0; gp <= last; x++, ++gp) {
786 if(!selected(x, y)) {
787 continue;
788 } else {
789 is_selected = 1;
790 }
791
792 p = (gp->state & GLYPH_SET) ? gp->c : " ";
793 size = utf8size(p);
794 memcpy(ptr, p, size);
795 ptr += size;
796 }
797 /* \n at the end of every selected line except for the last one */
798 if(is_selected && y < sel.e.y)
799 *ptr++ = '\n';
800 }
801 *ptr = 0;
802 }
803 xsetsel(str);
804 }
805
806 void
807 selnotify(XEvent *e) {
808 ulong nitems, ofs, rem;
809 int format;
810 uchar *data;
811 Atom type;
812
813 ofs = 0;
814 do {
815 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
816 False, AnyPropertyType, &type, &format,
817 &nitems, &rem, &data)) {
818 fprintf(stderr, "Clipboard allocation failed\n");
819 return;
820 }
821 ttywrite((const char *) data, nitems * format / 8);
822 XFree(data);
823 /* number of 32-bit chunks returned */
824 ofs += nitems * format / 32;
825 } while(rem > 0);
826 }
827
828 void
829 selpaste(const Arg *dummy) {
830 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
831 xw.win, CurrentTime);
832 }
833
834 void
835 clippaste(const Arg *dummy) {
836 Atom clipboard;
837
838 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
839 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
840 xw.win, CurrentTime);
841 }
842
843 void
844 selclear(XEvent *e) {
845 if(sel.bx == -1)
846 return;
847 sel.bx = -1;
848 tsetdirt(sel.b.y, sel.e.y);
849 }
850
851 void
852 selrequest(XEvent *e) {
853 XSelectionRequestEvent *xsre;
854 XSelectionEvent xev;
855 Atom xa_targets, string;
856
857 xsre = (XSelectionRequestEvent *) e;
858 xev.type = SelectionNotify;
859 xev.requestor = xsre->requestor;
860 xev.selection = xsre->selection;
861 xev.target = xsre->target;
862 xev.time = xsre->time;
863 /* reject */
864 xev.property = None;
865
866 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
867 if(xsre->target == xa_targets) {
868 /* respond with the supported type */
869 string = sel.xtarget;
870 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
871 XA_ATOM, 32, PropModeReplace,
872 (uchar *) &string, 1);
873 xev.property = xsre->property;
874 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
875 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
876 xsre->target, 8, PropModeReplace,
877 (uchar *) sel.clip, strlen(sel.clip));
878 xev.property = xsre->property;
879 }
880
881 /* all done, send a notification to the listener */
882 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
883 fprintf(stderr, "Error sending SelectionNotify event\n");
884 }
885
886 void
887 xsetsel(char *str) {
888 /* register the selection for both the clipboard and the primary */
889 Atom clipboard;
890
891 free(sel.clip);
892 sel.clip = str;
893
894 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
895
896 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
897 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
898 }
899
900 void
901 brelease(XEvent *e) {
902 struct timeval now;
903
904 if(IS_SET(MODE_MOUSE)) {
905 mousereport(e);
906 return;
907 }
908
909 if(e->xbutton.button == Button2) {
910 selpaste(NULL);
911 } else if(e->xbutton.button == Button1) {
912 sel.mode = 0;
913 getbuttoninfo(e);
914 term.dirty[sel.ey] = 1;
915 if(sel.bx == sel.ex && sel.by == sel.ey) {
916 sel.bx = -1;
917 gettimeofday(&now, NULL);
918
919 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
920 /* triple click on the line */
921 sel.b.x = sel.bx = 0;
922 sel.e.x = sel.ex = term.col;
923 sel.b.y = sel.e.y = sel.ey;
924 selcopy();
925 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
926 /* double click to select word */
927 sel.bx = sel.ex;
928 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
929 term.line[sel.ey][sel.bx-1].c[0] != ' ') {
930 sel.bx--;
931 }
932 sel.b.x = sel.bx;
933 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
934 term.line[sel.ey][sel.ex+1].c[0] != ' ') {
935 sel.ex++;
936 }
937 sel.e.x = sel.ex;
938 sel.b.y = sel.e.y = sel.ey;
939 selcopy();
940 }
941 } else {
942 selcopy();
943 }
944 }
945
946 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
947 gettimeofday(&sel.tclick1, NULL);
948 }
949
950 void
951 bmotion(XEvent *e) {
952 int oldey, oldex, oldsby, oldsey;
953
954 if(IS_SET(MODE_MOUSE)) {
955 mousereport(e);
956 return;
957 }
958
959 if(!sel.mode)
960 return;
961
962 oldey = sel.ey;
963 oldex = sel.ex;
964 oldsby = sel.b.y;
965 oldsey = sel.e.y;
966 getbuttoninfo(e);
967
968 if(oldey != sel.ey || oldex != sel.ex) {
969 tsetdirt(MIN(sel.b.y, oldsby), MAX(sel.e.y, oldsey));
970 }
971 }
972
973 void
974 die(const char *errstr, ...) {
975 va_list ap;
976
977 va_start(ap, errstr);
978 vfprintf(stderr, errstr, ap);
979 va_end(ap);
980 exit(EXIT_FAILURE);
981 }
982
983 void
984 execsh(void) {
985 char **args;
986 char *envshell = getenv("SHELL");
987 const struct passwd *pass = getpwuid(getuid());
988 char buf[sizeof(long) * 8 + 1];
989
990 unsetenv("COLUMNS");
991 unsetenv("LINES");
992 unsetenv("TERMCAP");
993
994 if(pass) {
995 setenv("LOGNAME", pass->pw_name, 1);
996 setenv("USER", pass->pw_name, 1);
997 setenv("SHELL", pass->pw_shell, 0);
998 setenv("HOME", pass->pw_dir, 0);
999 }
1000
1001 snprintf(buf, sizeof(buf), "%lu", xw.win);
1002 setenv("WINDOWID", buf, 1);
1003
1004 signal(SIGCHLD, SIG_DFL);
1005 signal(SIGHUP, SIG_DFL);
1006 signal(SIGINT, SIG_DFL);
1007 signal(SIGQUIT, SIG_DFL);
1008 signal(SIGTERM, SIG_DFL);
1009 signal(SIGALRM, SIG_DFL);
1010
1011 DEFAULT(envshell, shell);
1012 setenv("TERM", termname, 1);
1013 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1014 execvp(args[0], args);
1015 exit(EXIT_FAILURE);
1016 }
1017
1018 void
1019 sigchld(int a) {
1020 int stat = 0;
1021
1022 if(waitpid(pid, &stat, 0) < 0)
1023 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1024
1025 if(WIFEXITED(stat)) {
1026 exit(WEXITSTATUS(stat));
1027 } else {
1028 exit(EXIT_FAILURE);
1029 }
1030 }
1031
1032 void
1033 ttynew(void) {
1034 int m, s;
1035 struct winsize w = {term.row, term.col, 0, 0};
1036
1037 /* seems to work fine on linux, openbsd and freebsd */
1038 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1039 die("openpty failed: %s\n", SERRNO);
1040
1041 switch(pid = fork()) {
1042 case -1:
1043 die("fork failed\n");
1044 break;
1045 case 0:
1046 setsid(); /* create a new process group */
1047 dup2(s, STDIN_FILENO);
1048 dup2(s, STDOUT_FILENO);
1049 dup2(s, STDERR_FILENO);
1050 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1051 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1052 close(s);
1053 close(m);
1054 execsh();
1055 break;
1056 default:
1057 close(s);
1058 cmdfd = m;
1059 signal(SIGCHLD, sigchld);
1060 if(opt_io) {
1061 iofd = (!strcmp(opt_io, "-")) ?
1062 STDOUT_FILENO :
1063 open(opt_io, O_WRONLY | O_CREAT, 0666);
1064 if(iofd < 0) {
1065 fprintf(stderr, "Error opening %s:%s\n",
1066 opt_io, strerror(errno));
1067 }
1068 }
1069 }
1070 }
1071
1072 void
1073 dump(char c) {
1074 static int col;
1075
1076 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1077 if(++col % 10 == 0)
1078 fprintf(stderr, "\n");
1079 }
1080
1081 void
1082 ttyread(void) {
1083 static char buf[BUFSIZ];
1084 static int buflen = 0;
1085 char *ptr;
1086 char s[UTF_SIZ];
1087 int charsize; /* size of utf8 char in bytes */
1088 long utf8c;
1089 int ret;
1090
1091 /* append read bytes to unprocessed bytes */
1092 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1093 die("Couldn't read from shell: %s\n", SERRNO);
1094
1095 /* process every complete utf8 char */
1096 buflen += ret;
1097 ptr = buf;
1098 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1099 charsize = utf8decode(ptr, &utf8c);
1100 utf8encode(&utf8c, s);
1101 tputc(s, charsize);
1102 ptr += charsize;
1103 buflen -= charsize;
1104 }
1105
1106 /* keep any uncomplete utf8 char for the next call */
1107 memmove(buf, ptr, buflen);
1108 }
1109
1110 void
1111 ttywrite(const char *s, size_t n) {
1112 if(write(cmdfd, s, n) == -1)
1113 die("write error on tty: %s\n", SERRNO);
1114 }
1115
1116 void
1117 ttyresize(void) {
1118 struct winsize w;
1119
1120 w.ws_row = term.row;
1121 w.ws_col = term.col;
1122 w.ws_xpixel = xw.tw;
1123 w.ws_ypixel = xw.th;
1124 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1125 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1126 }
1127
1128 void
1129 tsetdirt(int top, int bot) {
1130 int i;
1131
1132 LIMIT(top, 0, term.row-1);
1133 LIMIT(bot, 0, term.row-1);
1134
1135 for(i = top; i <= bot; i++)
1136 term.dirty[i] = 1;
1137 }
1138
1139 void
1140 tfulldirt(void) {
1141 tsetdirt(0, term.row-1);
1142 }
1143
1144 void
1145 tcursor(int mode) {
1146 static TCursor c;
1147
1148 if(mode == CURSOR_SAVE) {
1149 c = term.c;
1150 } else if(mode == CURSOR_LOAD) {
1151 term.c = c;
1152 tmoveto(c.x, c.y);
1153 }
1154 }
1155
1156 void
1157 treset(void) {
1158 uint i;
1159
1160 term.c = (TCursor){{
1161 .mode = ATTR_NULL,
1162 .fg = defaultfg,
1163 .bg = defaultbg
1164 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1165
1166 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1167 for(i = tabspaces; i < term.col; i += tabspaces)
1168 term.tabs[i] = 1;
1169 term.top = 0;
1170 term.bot = term.row - 1;
1171 term.mode = MODE_WRAP;
1172
1173 tclearregion(0, 0, term.col-1, term.row-1, 0);
1174 tmoveto(0, 0);
1175 tcursor(CURSOR_SAVE);
1176 }
1177
1178 void
1179 tnew(int col, int row) {
1180 /* set screen size */
1181 term.row = row;
1182 term.col = col;
1183 term.line = xmalloc(term.row * sizeof(Line));
1184 term.alt = xmalloc(term.row * sizeof(Line));
1185 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
1186 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
1187
1188 for(row = 0; row < term.row; row++) {
1189 term.line[row] = xmalloc(term.col * sizeof(Glyph));
1190 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
1191 term.dirty[row] = 0;
1192 }
1193
1194 term.numlock = 1;
1195 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1196 /* setup screen */
1197 treset();
1198 }
1199
1200 void
1201 tswapscreen(void) {
1202 Line *tmp = term.line;
1203
1204 term.line = term.alt;
1205 term.alt = tmp;
1206 term.mode ^= MODE_ALTSCREEN;
1207 tfulldirt();
1208 }
1209
1210 void
1211 tscrolldown(int orig, int n) {
1212 int i;
1213 Line temp;
1214
1215 LIMIT(n, 0, term.bot-orig+1);
1216
1217 tclearregion(0, term.bot-n+1, term.col-1, term.bot, 0);
1218
1219 for(i = term.bot; i >= orig+n; i--) {
1220 temp = term.line[i];
1221 term.line[i] = term.line[i-n];
1222 term.line[i-n] = temp;
1223
1224 term.dirty[i] = 1;
1225 term.dirty[i-n] = 1;
1226 }
1227
1228 selscroll(orig, n);
1229 }
1230
1231 void
1232 tscrollup(int orig, int n) {
1233 int i;
1234 Line temp;
1235 LIMIT(n, 0, term.bot-orig+1);
1236
1237 tclearregion(0, orig, term.col-1, orig+n-1, 0);
1238
1239 for(i = orig; i <= term.bot-n; i++) {
1240 temp = term.line[i];
1241 term.line[i] = term.line[i+n];
1242 term.line[i+n] = temp;
1243
1244 term.dirty[i] = 1;
1245 term.dirty[i+n] = 1;
1246 }
1247
1248 selscroll(orig, -n);
1249 }
1250
1251 void
1252 selscroll(int orig, int n) {
1253 if(sel.bx == -1)
1254 return;
1255
1256 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1257 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1258 sel.bx = -1;
1259 return;
1260 }
1261 switch(sel.type) {
1262 case SEL_REGULAR:
1263 if(sel.by < term.top) {
1264 sel.by = term.top;
1265 sel.bx = 0;
1266 }
1267 if(sel.ey > term.bot) {
1268 sel.ey = term.bot;
1269 sel.ex = term.col;
1270 }
1271 break;
1272 case SEL_RECTANGULAR:
1273 if(sel.by < term.top)
1274 sel.by = term.top;
1275 if(sel.ey > term.bot)
1276 sel.ey = term.bot;
1277 break;
1278 };
1279 sel.b.y = sel.by, sel.b.x = sel.bx;
1280 sel.e.y = sel.ey, sel.e.x = sel.ex;
1281 }
1282 }
1283
1284 void
1285 tnewline(int first_col) {
1286 int y = term.c.y;
1287
1288 if(y == term.bot) {
1289 tscrollup(term.top, 1);
1290 } else {
1291 y++;
1292 }
1293 tmoveto(first_col ? 0 : term.c.x, y);
1294 }
1295
1296 void
1297 csiparse(void) {
1298 /* int noarg = 1; */
1299 char *p = csiescseq.buf, *np;
1300 long int v;
1301
1302 csiescseq.narg = 0;
1303 if(*p == '?') {
1304 csiescseq.priv = 1;
1305 p++;
1306 }
1307
1308 while(p < csiescseq.buf+csiescseq.len) {
1309 np = NULL;
1310 v = strtol(p, &np, 10);
1311 if(v == LONG_MAX || v == LONG_MIN)
1312 v = -1;
1313 csiescseq.arg[csiescseq.narg] = v;
1314 if(np != NULL)
1315 p = np;
1316
1317 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ) {
1318 csiescseq.narg++, p++;
1319 } else {
1320 csiescseq.mode = *p;
1321 csiescseq.narg++;
1322
1323 return;
1324 }
1325 }
1326 }
1327
1328 /* for absolute user moves, when decom is set */
1329 void
1330 tmoveato(int x, int y) {
1331 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1332 }
1333
1334 void
1335 tmoveto(int x, int y) {
1336 int miny, maxy;
1337
1338 if(term.c.state & CURSOR_ORIGIN) {
1339 miny = term.top;
1340 maxy = term.bot;
1341 } else {
1342 miny = 0;
1343 maxy = term.row - 1;
1344 }
1345 LIMIT(x, 0, term.col-1);
1346 LIMIT(y, miny, maxy);
1347 term.c.state &= ~CURSOR_WRAPNEXT;
1348 term.c.x = x;
1349 term.c.y = y;
1350 }
1351
1352 void
1353 tsetchar(char *c, Glyph *attr, int x, int y) {
1354 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1355 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1356 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1357 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1358 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1359 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1360 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1361 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1362 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1363 };
1364
1365 /*
1366 * The table is proudly stolen from rxvt.
1367 */
1368 if(attr->mode & ATTR_GFX) {
1369 if(c[0] >= 0x41 && c[0] <= 0x7e
1370 && vt100_0[c[0] - 0x41]) {
1371 c = vt100_0[c[0] - 0x41];
1372 }
1373 }
1374
1375 term.dirty[y] = 1;
1376 term.line[y][x] = *attr;
1377 memcpy(term.line[y][x].c, c, UTF_SIZ);
1378 term.line[y][x].state |= GLYPH_SET;
1379 }
1380
1381 void
1382 tclearregion(int x1, int y1, int x2, int y2, int bce) {
1383 int x, y, temp;
1384
1385 if(x1 > x2)
1386 temp = x1, x1 = x2, x2 = temp;
1387 if(y1 > y2)
1388 temp = y1, y1 = y2, y2 = temp;
1389
1390 LIMIT(x1, 0, term.col-1);
1391 LIMIT(x2, 0, term.col-1);
1392 LIMIT(y1, 0, term.row-1);
1393 LIMIT(y2, 0, term.row-1);
1394
1395 for(y = y1; y <= y2; y++) {
1396 term.dirty[y] = 1;
1397 for(x = x1; x <= x2; x++) {
1398 if(bce) {
1399 term.line[y][x] = term.c.attr;
1400 memcpy(term.line[y][x].c, " ", 2);
1401 term.line[y][x].state |= GLYPH_SET;
1402 } else {
1403 term.line[y][x].state = 0;
1404 }
1405 }
1406 }
1407 }
1408
1409 void
1410 tdeletechar(int n) {
1411 int src = term.c.x + n;
1412 int dst = term.c.x;
1413 int size = term.col - src;
1414
1415 term.dirty[term.c.y] = 1;
1416
1417 if(src >= term.col) {
1418 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1419 return;
1420 }
1421
1422 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1423 size * sizeof(Glyph));
1424 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y, 0);
1425 }
1426
1427 void
1428 tinsertblank(int n) {
1429 int src = term.c.x;
1430 int dst = src + n;
1431 int size = term.col - dst;
1432
1433 term.dirty[term.c.y] = 1;
1434
1435 if(dst >= term.col) {
1436 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1437 return;
1438 }
1439
1440 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1441 size * sizeof(Glyph));
1442 tclearregion(src, term.c.y, dst - 1, term.c.y, 0);
1443 }
1444
1445 void
1446 tinsertblankline(int n) {
1447 if(term.c.y < term.top || term.c.y > term.bot)
1448 return;
1449
1450 tscrolldown(term.c.y, n);
1451 }
1452
1453 void
1454 tdeleteline(int n) {
1455 if(term.c.y < term.top || term.c.y > term.bot)
1456 return;
1457
1458 tscrollup(term.c.y, n);
1459 }
1460
1461 void
1462 tsetattr(int *attr, int l) {
1463 int i;
1464
1465 for(i = 0; i < l; i++) {
1466 switch(attr[i]) {
1467 case 0:
1468 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1469 | ATTR_ITALIC | ATTR_BLINK);
1470 term.c.attr.fg = defaultfg;
1471 term.c.attr.bg = defaultbg;
1472 break;
1473 case 1:
1474 term.c.attr.mode |= ATTR_BOLD;
1475 break;
1476 case 3:
1477 term.c.attr.mode |= ATTR_ITALIC;
1478 break;
1479 case 4:
1480 term.c.attr.mode |= ATTR_UNDERLINE;
1481 break;
1482 case 5: /* slow blink */
1483 case 6: /* rapid blink */
1484 term.c.attr.mode |= ATTR_BLINK;
1485 break;
1486 case 7:
1487 term.c.attr.mode |= ATTR_REVERSE;
1488 break;
1489 case 21:
1490 case 22:
1491 term.c.attr.mode &= ~ATTR_BOLD;
1492 break;
1493 case 23:
1494 term.c.attr.mode &= ~ATTR_ITALIC;
1495 break;
1496 case 24:
1497 term.c.attr.mode &= ~ATTR_UNDERLINE;
1498 break;
1499 case 25:
1500 case 26:
1501 term.c.attr.mode &= ~ATTR_BLINK;
1502 break;
1503 case 27:
1504 term.c.attr.mode &= ~ATTR_REVERSE;
1505 break;
1506 case 38:
1507 if(i + 2 < l && attr[i + 1] == 5) {
1508 i += 2;
1509 if(BETWEEN(attr[i], 0, 255)) {
1510 term.c.attr.fg = attr[i];
1511 } else {
1512 fprintf(stderr,
1513 "erresc: bad fgcolor %d\n",
1514 attr[i]);
1515 }
1516 } else {
1517 fprintf(stderr,
1518 "erresc(38): gfx attr %d unknown\n",
1519 attr[i]);
1520 }
1521 break;
1522 case 39:
1523 term.c.attr.fg = defaultfg;
1524 break;
1525 case 48:
1526 if(i + 2 < l && attr[i + 1] == 5) {
1527 i += 2;
1528 if(BETWEEN(attr[i], 0, 255)) {
1529 term.c.attr.bg = attr[i];
1530 } else {
1531 fprintf(stderr,
1532 "erresc: bad bgcolor %d\n",
1533 attr[i]);
1534 }
1535 } else {
1536 fprintf(stderr,
1537 "erresc(48): gfx attr %d unknown\n",
1538 attr[i]);
1539 }
1540 break;
1541 case 49:
1542 term.c.attr.bg = defaultbg;
1543 break;
1544 default:
1545 if(BETWEEN(attr[i], 30, 37)) {
1546 term.c.attr.fg = attr[i] - 30;
1547 } else if(BETWEEN(attr[i], 40, 47)) {
1548 term.c.attr.bg = attr[i] - 40;
1549 } else if(BETWEEN(attr[i], 90, 97)) {
1550 term.c.attr.fg = attr[i] - 90 + 8;
1551 } else if(BETWEEN(attr[i], 100, 107)) {
1552 term.c.attr.bg = attr[i] - 100 + 8;
1553 } else {
1554 fprintf(stderr,
1555 "erresc(default): gfx attr %d unknown\n",
1556 attr[i]), csidump();
1557 }
1558 break;
1559 }
1560 }
1561 }
1562
1563 void
1564 tsetscroll(int t, int b) {
1565 int temp;
1566
1567 LIMIT(t, 0, term.row-1);
1568 LIMIT(b, 0, term.row-1);
1569 if(t > b) {
1570 temp = t;
1571 t = b;
1572 b = temp;
1573 }
1574 term.top = t;
1575 term.bot = b;
1576 }
1577
1578 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1579
1580 void
1581 tsetmode(bool priv, bool set, int *args, int narg) {
1582 int *lim, mode;
1583 bool alt;
1584
1585 for(lim = args + narg; args < lim; ++args) {
1586 if(priv) {
1587 switch(*args) {
1588 break;
1589 case 1: /* DECCKM -- Cursor key */
1590 MODBIT(term.mode, set, MODE_APPCURSOR);
1591 break;
1592 case 5: /* DECSCNM -- Reverse video */
1593 mode = term.mode;
1594 MODBIT(term.mode, set, MODE_REVERSE);
1595 if(mode != term.mode)
1596 redraw(REDRAW_TIMEOUT);
1597 break;
1598 case 6: /* DECOM -- Origin */
1599 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1600 tmoveato(0, 0);
1601 break;
1602 case 7: /* DECAWM -- Auto wrap */
1603 MODBIT(term.mode, set, MODE_WRAP);
1604 break;
1605 case 0: /* Error (IGNORED) */
1606 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1607 case 3: /* DECCOLM -- Column (IGNORED) */
1608 case 4: /* DECSCLM -- Scroll (IGNORED) */
1609 case 8: /* DECARM -- Auto repeat (IGNORED) */
1610 case 18: /* DECPFF -- Printer feed (IGNORED) */
1611 case 19: /* DECPEX -- Printer extent (IGNORED) */
1612 case 42: /* DECNRCM -- National characters (IGNORED) */
1613 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1614 break;
1615 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1616 MODBIT(term.mode, !set, MODE_HIDE);
1617 break;
1618 case 1000: /* 1000,1002: enable xterm mouse report */
1619 MODBIT(term.mode, set, MODE_MOUSEBTN);
1620 MODBIT(term.mode, 0, MODE_MOUSEMOTION);
1621 break;
1622 case 1002:
1623 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1624 MODBIT(term.mode, 0, MODE_MOUSEBTN);
1625 break;
1626 case 1006:
1627 MODBIT(term.mode, set, MODE_MOUSESGR);
1628 break;
1629 case 1049: /* = 1047 and 1048 */
1630 case 47:
1631 case 1047: {
1632 alt = IS_SET(MODE_ALTSCREEN);
1633 if(alt) {
1634 tclearregion(0, 0, term.col-1,
1635 term.row-1, 0);
1636 }
1637 if(set ^ alt) /* set is always 1 or 0 */
1638 tswapscreen();
1639 if(*args != 1049)
1640 break;
1641 }
1642 /* pass through */
1643 case 1048:
1644 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1645 break;
1646 default:
1647 fprintf(stderr,
1648 "erresc: unknown private set/reset mode %d\n",
1649 *args);
1650 break;
1651 }
1652 } else {
1653 switch(*args) {
1654 case 0: /* Error (IGNORED) */
1655 break;
1656 case 2: /* KAM -- keyboard action */
1657 MODBIT(term.mode, set, MODE_KBDLOCK);
1658 break;
1659 case 4: /* IRM -- Insertion-replacement */
1660 MODBIT(term.mode, set, MODE_INSERT);
1661 break;
1662 case 12: /* SRM -- Send/Receive */
1663 MODBIT(term.mode, !set, MODE_ECHO);
1664 break;
1665 case 20: /* LNM -- Linefeed/new line */
1666 MODBIT(term.mode, set, MODE_CRLF);
1667 break;
1668 default:
1669 fprintf(stderr,
1670 "erresc: unknown set/reset mode %d\n",
1671 *args);
1672 break;
1673 }
1674 }
1675 }
1676 }
1677 #undef MODBIT
1678
1679
1680 void
1681 csihandle(void) {
1682 switch(csiescseq.mode) {
1683 default:
1684 unknown:
1685 fprintf(stderr, "erresc: unknown csi ");
1686 csidump();
1687 /* die(""); */
1688 break;
1689 case '@': /* ICH -- Insert <n> blank char */
1690 DEFAULT(csiescseq.arg[0], 1);
1691 tinsertblank(csiescseq.arg[0]);
1692 break;
1693 case 'A': /* CUU -- Cursor <n> Up */
1694 DEFAULT(csiescseq.arg[0], 1);
1695 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1696 break;
1697 case 'B': /* CUD -- Cursor <n> Down */
1698 case 'e': /* VPR --Cursor <n> Down */
1699 DEFAULT(csiescseq.arg[0], 1);
1700 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1701 break;
1702 case 'c': /* DA -- Device Attributes */
1703 if(csiescseq.arg[0] == 0)
1704 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1705 break;
1706 case 'C': /* CUF -- Cursor <n> Forward */
1707 case 'a': /* HPR -- Cursor <n> Forward */
1708 DEFAULT(csiescseq.arg[0], 1);
1709 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1710 break;
1711 case 'D': /* CUB -- Cursor <n> Backward */
1712 DEFAULT(csiescseq.arg[0], 1);
1713 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1714 break;
1715 case 'E': /* CNL -- Cursor <n> Down and first col */
1716 DEFAULT(csiescseq.arg[0], 1);
1717 tmoveto(0, term.c.y+csiescseq.arg[0]);
1718 break;
1719 case 'F': /* CPL -- Cursor <n> Up and first col */
1720 DEFAULT(csiescseq.arg[0], 1);
1721 tmoveto(0, term.c.y-csiescseq.arg[0]);
1722 break;
1723 case 'g': /* TBC -- Tabulation clear */
1724 switch(csiescseq.arg[0]) {
1725 case 0: /* clear current tab stop */
1726 term.tabs[term.c.x] = 0;
1727 break;
1728 case 3: /* clear all the tabs */
1729 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1730 break;
1731 default:
1732 goto unknown;
1733 }
1734 break;
1735 case 'G': /* CHA -- Move to <col> */
1736 case '`': /* HPA */
1737 DEFAULT(csiescseq.arg[0], 1);
1738 tmoveto(csiescseq.arg[0]-1, term.c.y);
1739 break;
1740 case 'H': /* CUP -- Move to <row> <col> */
1741 case 'f': /* HVP */
1742 DEFAULT(csiescseq.arg[0], 1);
1743 DEFAULT(csiescseq.arg[1], 1);
1744 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1745 break;
1746 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1747 DEFAULT(csiescseq.arg[0], 1);
1748 while(csiescseq.arg[0]--)
1749 tputtab(1);
1750 break;
1751 case 'J': /* ED -- Clear screen */
1752 sel.bx = -1;
1753 switch(csiescseq.arg[0]) {
1754 case 0: /* below */
1755 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 1);
1756 if(term.c.y < term.row-1) {
1757 tclearregion(0, term.c.y+1, term.col-1,
1758 term.row-1, 1);
1759 }
1760 break;
1761 case 1: /* above */
1762 if(term.c.y > 1)
1763 tclearregion(0, 0, term.col-1, term.c.y-1, 1);
1764 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1765 break;
1766 case 2: /* all */
1767 tclearregion(0, 0, term.col-1, term.row-1, 1);
1768 break;
1769 default:
1770 goto unknown;
1771 }
1772 break;
1773 case 'K': /* EL -- Clear line */
1774 switch(csiescseq.arg[0]) {
1775 case 0: /* right */
1776 tclearregion(term.c.x, term.c.y, term.col-1,
1777 term.c.y, 1);
1778 break;
1779 case 1: /* left */
1780 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1781 break;
1782 case 2: /* all */
1783 tclearregion(0, term.c.y, term.col-1, term.c.y, 1);
1784 break;
1785 }
1786 break;
1787 case 'S': /* SU -- Scroll <n> line up */
1788 DEFAULT(csiescseq.arg[0], 1);
1789 tscrollup(term.top, csiescseq.arg[0]);
1790 break;
1791 case 'T': /* SD -- Scroll <n> line down */
1792 DEFAULT(csiescseq.arg[0], 1);
1793 tscrolldown(term.top, csiescseq.arg[0]);
1794 break;
1795 case 'L': /* IL -- Insert <n> blank lines */
1796 DEFAULT(csiescseq.arg[0], 1);
1797 tinsertblankline(csiescseq.arg[0]);
1798 break;
1799 case 'l': /* RM -- Reset Mode */
1800 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1801 break;
1802 case 'M': /* DL -- Delete <n> lines */
1803 DEFAULT(csiescseq.arg[0], 1);
1804 tdeleteline(csiescseq.arg[0]);
1805 break;
1806 case 'X': /* ECH -- Erase <n> char */
1807 DEFAULT(csiescseq.arg[0], 1);
1808 tclearregion(term.c.x, term.c.y,
1809 term.c.x + csiescseq.arg[0] - 1, term.c.y, 1);
1810 break;
1811 case 'P': /* DCH -- Delete <n> char */
1812 DEFAULT(csiescseq.arg[0], 1);
1813 tdeletechar(csiescseq.arg[0]);
1814 break;
1815 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1816 DEFAULT(csiescseq.arg[0], 1);
1817 while(csiescseq.arg[0]--)
1818 tputtab(0);
1819 break;
1820 case 'd': /* VPA -- Move to <row> */
1821 DEFAULT(csiescseq.arg[0], 1);
1822 tmoveato(term.c.x, csiescseq.arg[0]-1);
1823 break;
1824 case 'h': /* SM -- Set terminal mode */
1825 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1826 break;
1827 case 'm': /* SGR -- Terminal attribute (color) */
1828 tsetattr(csiescseq.arg, csiescseq.narg);
1829 break;
1830 case 'r': /* DECSTBM -- Set Scrolling Region */
1831 if(csiescseq.priv) {
1832 goto unknown;
1833 } else {
1834 DEFAULT(csiescseq.arg[0], 1);
1835 DEFAULT(csiescseq.arg[1], term.row);
1836 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1837 tmoveato(0, 0);
1838 }
1839 break;
1840 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1841 tcursor(CURSOR_SAVE);
1842 break;
1843 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1844 tcursor(CURSOR_LOAD);
1845 break;
1846 }
1847 }
1848
1849 void
1850 csidump(void) {
1851 int i;
1852 uint c;
1853
1854 printf("ESC[");
1855 for(i = 0; i < csiescseq.len; i++) {
1856 c = csiescseq.buf[i] & 0xff;
1857 if(isprint(c)) {
1858 putchar(c);
1859 } else if(c == '\n') {
1860 printf("(\\n)");
1861 } else if(c == '\r') {
1862 printf("(\\r)");
1863 } else if(c == 0x1b) {
1864 printf("(\\e)");
1865 } else {
1866 printf("(%02x)", c);
1867 }
1868 }
1869 putchar('\n');
1870 }
1871
1872 void
1873 csireset(void) {
1874 memset(&csiescseq, 0, sizeof(csiescseq));
1875 }
1876
1877 void
1878 strhandle(void) {
1879 char *p = NULL;
1880 int i, j, narg;
1881
1882 strparse();
1883 narg = strescseq.narg;
1884
1885 switch(strescseq.type) {
1886 case ']': /* OSC -- Operating System Command */
1887 switch(i = atoi(strescseq.args[0])) {
1888 case 0:
1889 case 1:
1890 case 2:
1891 if(narg > 1)
1892 xsettitle(strescseq.args[1]);
1893 break;
1894 case 4: /* color set */
1895 if(narg < 3)
1896 break;
1897 p = strescseq.args[2];
1898 /* fall through */
1899 case 104: /* color reset, here p = NULL */
1900 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
1901 if (!xsetcolorname(j, p)) {
1902 fprintf(stderr, "erresc: invalid color %s\n", p);
1903 } else {
1904 /*
1905 * TODO if defaultbg color is changed, borders
1906 * are dirty
1907 */
1908 redraw(0);
1909 }
1910 break;
1911 default:
1912 fprintf(stderr, "erresc: unknown str ");
1913 strdump();
1914 break;
1915 }
1916 break;
1917 case 'k': /* old title set compatibility */
1918 xsettitle(strescseq.args[0]);
1919 break;
1920 case 'P': /* DSC -- Device Control String */
1921 case '_': /* APC -- Application Program Command */
1922 case '^': /* PM -- Privacy Message */
1923 default:
1924 fprintf(stderr, "erresc: unknown str ");
1925 strdump();
1926 /* die(""); */
1927 break;
1928 }
1929 }
1930
1931 void
1932 strparse(void) {
1933 char *p = strescseq.buf, *np, *sp;
1934
1935 strescseq.narg = 0;
1936 np = strtok_r(strescseq.buf, ";", &sp);
1937 while(p < strescseq.buf+strescseq.len && np != NULL) {
1938 strescseq.args[strescseq.narg++] = p;
1939
1940 np = strtok_r(NULL, ";", &sp);
1941 if(np != NULL)
1942 p = np;
1943 }
1944 }
1945
1946 void
1947 strdump(void) {
1948 int i;
1949 uint c;
1950
1951 printf("ESC%c", strescseq.type);
1952 for(i = 0; i < strescseq.len; i++) {
1953 c = strescseq.buf[i] & 0xff;
1954 if(isprint(c)) {
1955 putchar(c);
1956 } else if(c == '\n') {
1957 printf("(\\n)");
1958 } else if(c == '\r') {
1959 printf("(\\r)");
1960 } else if(c == 0x1b) {
1961 printf("(\\e)");
1962 } else {
1963 printf("(%02x)", c);
1964 }
1965 }
1966 printf("ESC\\\n");
1967 }
1968
1969 void
1970 strreset(void) {
1971 memset(&strescseq, 0, sizeof(strescseq));
1972 }
1973
1974 void
1975 tputtab(bool forward) {
1976 uint x = term.c.x;
1977
1978 if(forward) {
1979 if(x == term.col)
1980 return;
1981 for(++x; x < term.col && !term.tabs[x]; ++x)
1982 /* nothing */ ;
1983 } else {
1984 if(x == 0)
1985 return;
1986 for(--x; x > 0 && !term.tabs[x]; --x)
1987 /* nothing */ ;
1988 }
1989 tmoveto(x, term.c.y);
1990 }
1991
1992 void
1993 techo(char *buf, int len) {
1994 for(; len > 0; buf++, len--) {
1995 char c = *buf;
1996
1997 if(c == '\033') { /* escape */
1998 tputc("^", 1);
1999 tputc("[", 1);
2000 } else if(c < '\x20') { /* control code */
2001 if(c != '\n' && c != '\r' && c != '\t') {
2002 c |= '\x40';
2003 tputc("^", 1);
2004 }
2005 tputc(&c, 1);
2006 } else {
2007 break;
2008 }
2009 }
2010 if(len)
2011 tputc(buf, len);
2012 }
2013
2014 void
2015 tputc(char *c, int len) {
2016 uchar ascii = *c;
2017 bool control = ascii < '\x20' || ascii == 0177;
2018
2019 if(iofd != -1) {
2020 if(xwrite(iofd, c, len) < 0) {
2021 fprintf(stderr, "Error writing in %s:%s\n",
2022 opt_io, strerror(errno));
2023 close(iofd);
2024 iofd = -1;
2025 }
2026 }
2027
2028 /*
2029 * STR sequences must be checked before anything else
2030 * because it can use some control codes as part of the sequence.
2031 */
2032 if(term.esc & ESC_STR) {
2033 switch(ascii) {
2034 case '\033':
2035 term.esc = ESC_START | ESC_STR_END;
2036 break;
2037 case '\a': /* backwards compatibility to xterm */
2038 term.esc = 0;
2039 strhandle();
2040 break;
2041 default:
2042 if(strescseq.len + len < sizeof(strescseq.buf)) {
2043 memmove(&strescseq.buf[strescseq.len], c, len);
2044 strescseq.len += len;
2045 } else {
2046 /*
2047 * Here is a bug in terminals. If the user never sends
2048 * some code to stop the str or esc command, then st
2049 * will stop responding. But this is better than
2050 * silently failing with unknown characters. At least
2051 * then users will report back.
2052 *
2053 * In the case users ever get fixed, here is the code:
2054 */
2055 /*
2056 * term.esc = 0;
2057 * strhandle();
2058 */
2059 }
2060 }
2061 return;
2062 }
2063
2064 /*
2065 * Actions of control codes must be performed as soon they arrive
2066 * because they can be embedded inside a control sequence, and
2067 * they must not cause conflicts with sequences.
2068 */
2069 if(control) {
2070 switch(ascii) {
2071 case '\t': /* HT */
2072 tputtab(1);
2073 return;
2074 case '\b': /* BS */
2075 tmoveto(term.c.x-1, term.c.y);
2076 return;
2077 case '\r': /* CR */
2078 tmoveto(0, term.c.y);
2079 return;
2080 case '\f': /* LF */
2081 case '\v': /* VT */
2082 case '\n': /* LF */
2083 /* go to first col if the mode is set */
2084 tnewline(IS_SET(MODE_CRLF));
2085 return;
2086 case '\a': /* BEL */
2087 if(!(xw.state & WIN_FOCUSED))
2088 xseturgency(1);
2089 return;
2090 case '\033': /* ESC */
2091 csireset();
2092 term.esc = ESC_START;
2093 return;
2094 case '\016': /* SO */
2095 case '\017': /* SI */
2096 /*
2097 * Different charsets are hard to handle. Applications
2098 * should use the right alt charset escapes for the
2099 * only reason they still exist: line drawing. The
2100 * rest is incompatible history st should not support.
2101 */
2102 return;
2103 case '\032': /* SUB */
2104 case '\030': /* CAN */
2105 csireset();
2106 return;
2107 case '\005': /* ENQ (IGNORED) */
2108 case '\000': /* NUL (IGNORED) */
2109 case '\021': /* XON (IGNORED) */
2110 case '\023': /* XOFF (IGNORED) */
2111 case 0177: /* DEL (IGNORED) */
2112 return;
2113 }
2114 } else if(term.esc & ESC_START) {
2115 if(term.esc & ESC_CSI) {
2116 csiescseq.buf[csiescseq.len++] = ascii;
2117 if(BETWEEN(ascii, 0x40, 0x7E)
2118 || csiescseq.len >= ESC_BUF_SIZ) {
2119 term.esc = 0;
2120 csiparse();
2121 csihandle();
2122 }
2123 } else if(term.esc & ESC_STR_END) {
2124 term.esc = 0;
2125 if(ascii == '\\')
2126 strhandle();
2127 } else if(term.esc & ESC_ALTCHARSET) {
2128 switch(ascii) {
2129 case '0': /* Line drawing set */
2130 term.c.attr.mode |= ATTR_GFX;
2131 break;
2132 case 'B': /* USASCII */
2133 term.c.attr.mode &= ~ATTR_GFX;
2134 break;
2135 case 'A': /* UK (IGNORED) */
2136 case '<': /* multinational charset (IGNORED) */
2137 case '5': /* Finnish (IGNORED) */
2138 case 'C': /* Finnish (IGNORED) */
2139 case 'K': /* German (IGNORED) */
2140 break;
2141 default:
2142 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2143 }
2144 term.esc = 0;
2145 } else if(term.esc & ESC_TEST) {
2146 if(ascii == '8') { /* DEC screen alignment test. */
2147 char E[UTF_SIZ] = "E";
2148 int x, y;
2149
2150 for(x = 0; x < term.col; ++x) {
2151 for(y = 0; y < term.row; ++y)
2152 tsetchar(E, &term.c.attr, x, y);
2153 }
2154 }
2155 term.esc = 0;
2156 } else {
2157 switch(ascii) {
2158 case '[':
2159 term.esc |= ESC_CSI;
2160 break;
2161 case '#':
2162 term.esc |= ESC_TEST;
2163 break;
2164 case 'P': /* DCS -- Device Control String */
2165 case '_': /* APC -- Application Program Command */
2166 case '^': /* PM -- Privacy Message */
2167 case ']': /* OSC -- Operating System Command */
2168 case 'k': /* old title set compatibility */
2169 strreset();
2170 strescseq.type = ascii;
2171 term.esc |= ESC_STR;
2172 break;
2173 case '(': /* set primary charset G0 */
2174 term.esc |= ESC_ALTCHARSET;
2175 break;
2176 case ')': /* set secondary charset G1 (IGNORED) */
2177 case '*': /* set tertiary charset G2 (IGNORED) */
2178 case '+': /* set quaternary charset G3 (IGNORED) */
2179 term.esc = 0;
2180 break;
2181 case 'D': /* IND -- Linefeed */
2182 if(term.c.y == term.bot) {
2183 tscrollup(term.top, 1);
2184 } else {
2185 tmoveto(term.c.x, term.c.y+1);
2186 }
2187 term.esc = 0;
2188 break;
2189 case 'E': /* NEL -- Next line */
2190 tnewline(1); /* always go to first col */
2191 term.esc = 0;
2192 break;
2193 case 'H': /* HTS -- Horizontal tab stop */
2194 term.tabs[term.c.x] = 1;
2195 term.esc = 0;
2196 break;
2197 case 'M': /* RI -- Reverse index */
2198 if(term.c.y == term.top) {
2199 tscrolldown(term.top, 1);
2200 } else {
2201 tmoveto(term.c.x, term.c.y-1);
2202 }
2203 term.esc = 0;
2204 break;
2205 case 'Z': /* DECID -- Identify Terminal */
2206 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2207 term.esc = 0;
2208 break;
2209 case 'c': /* RIS -- Reset to inital state */
2210 treset();
2211 term.esc = 0;
2212 xresettitle();
2213 break;
2214 case '=': /* DECPAM -- Application keypad */
2215 term.mode |= MODE_APPKEYPAD;
2216 term.esc = 0;
2217 break;
2218 case '>': /* DECPNM -- Normal keypad */
2219 term.mode &= ~MODE_APPKEYPAD;
2220 term.esc = 0;
2221 break;
2222 case '7': /* DECSC -- Save Cursor */
2223 tcursor(CURSOR_SAVE);
2224 term.esc = 0;
2225 break;
2226 case '8': /* DECRC -- Restore Cursor */
2227 tcursor(CURSOR_LOAD);
2228 term.esc = 0;
2229 break;
2230 case '\\': /* ST -- Stop */
2231 term.esc = 0;
2232 break;
2233 default:
2234 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2235 (uchar) ascii, isprint(ascii)? ascii:'.');
2236 term.esc = 0;
2237 }
2238 }
2239 /*
2240 * All characters which form part of a sequence are not
2241 * printed
2242 */
2243 return;
2244 }
2245 /*
2246 * Display control codes only if we are in graphic mode
2247 */
2248 if(control && !(term.c.attr.mode & ATTR_GFX))
2249 return;
2250 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2251 sel.bx = -1;
2252 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2253 tnewline(1); /* always go to first col */
2254
2255 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2256 memmove(&term.line[term.c.y][term.c.x+1],
2257 &term.line[term.c.y][term.c.x],
2258 (term.col - term.c.x - 1) * sizeof(Glyph));
2259 }
2260
2261 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2262 if(term.c.x+1 < term.col) {
2263 tmoveto(term.c.x+1, term.c.y);
2264 } else {
2265 term.c.state |= CURSOR_WRAPNEXT;
2266 }
2267 }
2268
2269 int
2270 tresize(int col, int row) {
2271 int i, x;
2272 int minrow = MIN(row, term.row);
2273 int mincol = MIN(col, term.col);
2274 int slide = term.c.y - row + 1;
2275 bool *bp;
2276
2277 if(col < 1 || row < 1)
2278 return 0;
2279
2280 /* free unneeded rows */
2281 i = 0;
2282 if(slide > 0) {
2283 /*
2284 * slide screen to keep cursor where we expect it -
2285 * tscrollup would work here, but we can optimize to
2286 * memmove because we're freeing the earlier lines
2287 */
2288 for(/* i = 0 */; i < slide; i++) {
2289 free(term.line[i]);
2290 free(term.alt[i]);
2291 }
2292 memmove(term.line, term.line + slide, row * sizeof(Line));
2293 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2294 }
2295 for(i += row; i < term.row; i++) {
2296 free(term.line[i]);
2297 free(term.alt[i]);
2298 }
2299
2300 /* resize to new height */
2301 term.line = xrealloc(term.line, row * sizeof(Line));
2302 term.alt = xrealloc(term.alt, row * sizeof(Line));
2303 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2304 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2305
2306 /* resize each row to new width, zero-pad if needed */
2307 for(i = 0; i < minrow; i++) {
2308 term.dirty[i] = 1;
2309 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2310 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2311 for(x = mincol; x < col; x++) {
2312 term.line[i][x].state = 0;
2313 term.alt[i][x].state = 0;
2314 }
2315 }
2316
2317 /* allocate any new rows */
2318 for(/* i == minrow */; i < row; i++) {
2319 term.dirty[i] = 1;
2320 term.line[i] = xcalloc(col, sizeof(Glyph));
2321 term.alt [i] = xcalloc(col, sizeof(Glyph));
2322 }
2323 if(col > term.col) {
2324 bp = term.tabs + term.col;
2325
2326 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2327 while(--bp > term.tabs && !*bp)
2328 /* nothing */ ;
2329 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2330 *bp = 1;
2331 }
2332 /* update terminal size */
2333 term.col = col;
2334 term.row = row;
2335 /* reset scrolling region */
2336 tsetscroll(0, row-1);
2337 /* make use of the LIMIT in tmoveto */
2338 tmoveto(term.c.x, term.c.y);
2339
2340 return (slide > 0);
2341 }
2342
2343 void
2344 xresize(int col, int row) {
2345 xw.tw = MAX(1, col * xw.cw);
2346 xw.th = MAX(1, row * xw.ch);
2347
2348 XFreePixmap(xw.dpy, xw.buf);
2349 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2350 DefaultDepth(xw.dpy, xw.scr));
2351 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg].pixel);
2352 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2353
2354 XftDrawChange(xw.draw, xw.buf);
2355 }
2356
2357 static inline ushort
2358 sixd_to_16bit(int x) {
2359 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2360 }
2361
2362 void
2363 xloadcols(void) {
2364 int i, r, g, b;
2365 XRenderColor color = { .alpha = 0xffff };
2366
2367 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2368 for(i = 0; i < LEN(colorname); i++) {
2369 if(!colorname[i])
2370 continue;
2371 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2372 die("Could not allocate color '%s'\n", colorname[i]);
2373 }
2374 }
2375
2376 /* load colors [16-255] ; same colors as xterm */
2377 for(i = 16, r = 0; r < 6; r++) {
2378 for(g = 0; g < 6; g++) {
2379 for(b = 0; b < 6; b++) {
2380 color.red = sixd_to_16bit(r);
2381 color.green = sixd_to_16bit(g);
2382 color.blue = sixd_to_16bit(b);
2383 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2384 die("Could not allocate color %d\n", i);
2385 }
2386 i++;
2387 }
2388 }
2389 }
2390
2391 for(r = 0; r < 24; r++, i++) {
2392 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2393 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2394 &dc.col[i])) {
2395 die("Could not allocate color %d\n", i);
2396 }
2397 }
2398 }
2399
2400 int
2401 xsetcolorname(int x, const char *name) {
2402 XRenderColor color = { .alpha = 0xffff };
2403 Colour colour;
2404 if (x < 0 || x > LEN(colorname))
2405 return -1;
2406 if(!name) {
2407 if(16 <= x && x < 16 + 216) {
2408 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2409 color.red = sixd_to_16bit(r);
2410 color.green = sixd_to_16bit(g);
2411 color.blue = sixd_to_16bit(b);
2412 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2413 return 0; /* something went wrong */
2414 dc.col[x] = colour;
2415 return 1;
2416 } else if (16 + 216 <= x && x < 256) {
2417 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2418 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2419 return 0; /* something went wrong */
2420 dc.col[x] = colour;
2421 return 1;
2422 } else {
2423 name = colorname[x];
2424 }
2425 }
2426 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2427 return 0;
2428 dc.col[x] = colour;
2429 return 1;
2430 }
2431
2432 void
2433 xtermclear(int col1, int row1, int col2, int row2) {
2434 XftDrawRect(xw.draw,
2435 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2436 borderpx + col1 * xw.cw,
2437 borderpx + row1 * xw.ch,
2438 (col2-col1+1) * xw.cw,
2439 (row2-row1+1) * xw.ch);
2440 }
2441
2442 /*
2443 * Absolute coordinates.
2444 */
2445 void
2446 xclear(int x1, int y1, int x2, int y2) {
2447 XftDrawRect(xw.draw,
2448 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2449 x1, y1, x2-x1, y2-y1);
2450 }
2451
2452 void
2453 xhints(void) {
2454 XClassHint class = {opt_class ? opt_class : termname, termname};
2455 XWMHints wm = {.flags = InputHint, .input = 1};
2456 XSizeHints *sizeh = NULL;
2457
2458 sizeh = XAllocSizeHints();
2459 if(xw.isfixed == False) {
2460 sizeh->flags = PSize | PResizeInc | PBaseSize;
2461 sizeh->height = xw.h;
2462 sizeh->width = xw.w;
2463 sizeh->height_inc = xw.ch;
2464 sizeh->width_inc = xw.cw;
2465 sizeh->base_height = 2 * borderpx;
2466 sizeh->base_width = 2 * borderpx;
2467 } else {
2468 sizeh->flags = PMaxSize | PMinSize;
2469 sizeh->min_width = sizeh->max_width = xw.fw;
2470 sizeh->min_height = sizeh->max_height = xw.fh;
2471 }
2472
2473 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2474 XFree(sizeh);
2475 }
2476
2477 int
2478 xloadfont(Font *f, FcPattern *pattern) {
2479 FcPattern *match;
2480 FcResult result;
2481
2482 match = FcFontMatch(NULL, pattern, &result);
2483 if(!match)
2484 return 1;
2485
2486 if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
2487 FcPatternDestroy(match);
2488 return 1;
2489 }
2490
2491 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2492 FcPatternDestroy(match);
2493 return 1;
2494 }
2495
2496 f->pattern = FcPatternDuplicate(pattern);
2497
2498 f->ascent = f->match->ascent;
2499 f->descent = f->match->descent;
2500 f->lbearing = 0;
2501 f->rbearing = f->match->max_advance_width;
2502
2503 f->height = f->match->height;
2504 f->width = f->lbearing + f->rbearing;
2505
2506 return 0;
2507 }
2508
2509 void
2510 xloadfonts(char *fontstr, int fontsize) {
2511 FcPattern *pattern;
2512 FcResult result;
2513 double fontval;
2514
2515 if(fontstr[0] == '-') {
2516 pattern = XftXlfdParse(fontstr, False, False);
2517 } else {
2518 pattern = FcNameParse((FcChar8 *)fontstr);
2519 }
2520
2521 if(!pattern)
2522 die("st: can't open font %s\n", fontstr);
2523
2524 if(fontsize > 0) {
2525 FcPatternDel(pattern, FC_PIXEL_SIZE);
2526 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2527 usedfontsize = fontsize;
2528 } else {
2529 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2530 if(result == FcResultMatch) {
2531 usedfontsize = (int)fontval;
2532 } else {
2533 /*
2534 * Default font size is 12, if none given. This is to
2535 * have a known usedfontsize value.
2536 */
2537 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2538 usedfontsize = 12;
2539 }
2540 }
2541
2542 FcConfigSubstitute(0, pattern, FcMatchPattern);
2543 FcDefaultSubstitute(pattern);
2544
2545 if(xloadfont(&dc.font, pattern))
2546 die("st: can't open font %s\n", fontstr);
2547
2548 /* Setting character width and height. */
2549 xw.cw = dc.font.width;
2550 xw.ch = dc.font.height;
2551
2552 FcPatternDel(pattern, FC_SLANT);
2553 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2554 if(xloadfont(&dc.ifont, pattern))
2555 die("st: can't open font %s\n", fontstr);
2556
2557 FcPatternDel(pattern, FC_WEIGHT);
2558 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2559 if(xloadfont(&dc.ibfont, pattern))
2560 die("st: can't open font %s\n", fontstr);
2561
2562 FcPatternDel(pattern, FC_SLANT);
2563 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2564 if(xloadfont(&dc.bfont, pattern))
2565 die("st: can't open font %s\n", fontstr);
2566
2567 FcPatternDestroy(pattern);
2568 }
2569
2570 void
2571 xunloadfonts(void) {
2572 int i, ip;
2573
2574 /*
2575 * Free the loaded fonts in the font cache. This is done backwards
2576 * from the frccur.
2577 */
2578 for(i = 0, ip = frccur; i < frclen; i++, ip--) {
2579 if(ip < 0)
2580 ip = LEN(frc) - 1;
2581 XftFontClose(xw.dpy, frc[ip].font);
2582 }
2583 frccur = -1;
2584 frclen = 0;
2585
2586 XftFontClose(xw.dpy, dc.font.match);
2587 FcPatternDestroy(dc.font.pattern);
2588 FcFontSetDestroy(dc.font.set);
2589 XftFontClose(xw.dpy, dc.bfont.match);
2590 FcPatternDestroy(dc.bfont.pattern);
2591 FcFontSetDestroy(dc.bfont.set);
2592 XftFontClose(xw.dpy, dc.ifont.match);
2593 FcPatternDestroy(dc.ifont.pattern);
2594 FcFontSetDestroy(dc.ifont.set);
2595 XftFontClose(xw.dpy, dc.ibfont.match);
2596 FcPatternDestroy(dc.ibfont.pattern);
2597 FcFontSetDestroy(dc.ibfont.set);
2598 }
2599
2600 void
2601 xzoom(const Arg *arg) {
2602 xunloadfonts();
2603 xloadfonts(usedfont, usedfontsize + arg->i);
2604 cresize(0, 0);
2605 redraw(0);
2606 }
2607
2608 void
2609 xinit(void) {
2610 XSetWindowAttributes attrs;
2611 XGCValues gcvalues;
2612 Cursor cursor;
2613 Window parent;
2614 int sw, sh;
2615
2616 if(!(xw.dpy = XOpenDisplay(NULL)))
2617 die("Can't open display\n");
2618 xw.scr = XDefaultScreen(xw.dpy);
2619 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2620
2621 /* font */
2622 if(!FcInit())
2623 die("Could not init fontconfig.\n");
2624
2625 usedfont = (opt_font == NULL)? font : opt_font;
2626 xloadfonts(usedfont, 0);
2627
2628 /* colors */
2629 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2630 xloadcols();
2631
2632 /* adjust fixed window geometry */
2633 if(xw.isfixed) {
2634 sw = DisplayWidth(xw.dpy, xw.scr);
2635 sh = DisplayHeight(xw.dpy, xw.scr);
2636 if(xw.fx < 0)
2637 xw.fx = sw + xw.fx - xw.fw - 1;
2638 if(xw.fy < 0)
2639 xw.fy = sh + xw.fy - xw.fh - 1;
2640
2641 xw.h = xw.fh;
2642 xw.w = xw.fw;
2643 } else {
2644 /* window - default size */
2645 xw.h = 2 * borderpx + term.row * xw.ch;
2646 xw.w = 2 * borderpx + term.col * xw.cw;
2647 xw.fx = 0;
2648 xw.fy = 0;
2649 }
2650
2651 /* Events */
2652 attrs.background_pixel = dc.col[defaultbg].pixel;
2653 attrs.border_pixel = dc.col[defaultbg].pixel;
2654 attrs.bit_gravity = NorthWestGravity;
2655 attrs.event_mask = FocusChangeMask | KeyPressMask
2656 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2657 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2658 attrs.colormap = xw.cmap;
2659
2660 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2661 XRootWindow(xw.dpy, xw.scr);
2662 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2663 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2664 xw.vis,
2665 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2666 | CWColormap,
2667 &attrs);
2668
2669 memset(&gcvalues, 0, sizeof(gcvalues));
2670 gcvalues.graphics_exposures = False;
2671 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2672 &gcvalues);
2673 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2674 DefaultDepth(xw.dpy, xw.scr));
2675 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2676 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2677
2678 /* Xft rendering context */
2679 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2680
2681 /* input methods */
2682 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2683 XSetLocaleModifiers("@im=local");
2684 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2685 XSetLocaleModifiers("@im=");
2686 if((xw.xim = XOpenIM(xw.dpy,
2687 NULL, NULL, NULL)) == NULL) {
2688 die("XOpenIM failed. Could not open input"
2689 " device.\n");
2690 }
2691 }
2692 }
2693 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2694 | XIMStatusNothing, XNClientWindow, xw.win,
2695 XNFocusWindow, xw.win, NULL);
2696 if(xw.xic == NULL)
2697 die("XCreateIC failed. Could not obtain input method.\n");
2698
2699 /* white cursor, black outline */
2700 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2701 XDefineCursor(xw.dpy, xw.win, cursor);
2702 XRecolorCursor(xw.dpy, cursor,
2703 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2704 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2705
2706 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2707 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2708 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2709
2710 xresettitle();
2711 XMapWindow(xw.dpy, xw.win);
2712 xhints();
2713 XSync(xw.dpy, 0);
2714 }
2715
2716 void
2717 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2718 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2719 width = charlen * xw.cw, xp, i;
2720 int frp, frcflags;
2721 int u8fl, u8fblen, u8cblen, doesexist;
2722 char *u8c, *u8fs;
2723 long u8char;
2724 Font *font = &dc.font;
2725 FcResult fcres;
2726 FcPattern *fcpattern, *fontpattern;
2727 FcFontSet *fcsets[] = { NULL };
2728 FcCharSet *fccharset;
2729 Colour *fg = &dc.col[base.fg], *bg = &dc.col[base.bg],
2730 *temp, revfg, revbg;
2731 XRenderColor colfg, colbg;
2732
2733 frcflags = FRC_NORMAL;
2734
2735 if(base.mode & ATTR_BOLD) {
2736 if(BETWEEN(base.fg, 0, 7)) {
2737 /* basic system colors */
2738 fg = &dc.col[base.fg + 8];
2739 } else if(BETWEEN(base.fg, 16, 195)) {
2740 /* 256 colors */
2741 fg = &dc.col[base.fg + 36];
2742 } else if(BETWEEN(base.fg, 232, 251)) {
2743 /* greyscale */
2744 fg = &dc.col[base.fg + 4];
2745 }
2746 /*
2747 * Those ranges will not be brightened:
2748 * 8 - 15 – bright system colors
2749 * 196 - 231 – highest 256 color cube
2750 * 252 - 255 – brightest colors in greyscale
2751 */
2752 font = &dc.bfont;
2753 frcflags = FRC_BOLD;
2754 }
2755
2756 if(base.mode & ATTR_ITALIC) {
2757 font = &dc.ifont;
2758 frcflags = FRC_ITALIC;
2759 }
2760 if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2761 font = &dc.ibfont;
2762 frcflags = FRC_ITALICBOLD;
2763 }
2764
2765 if(IS_SET(MODE_REVERSE)) {
2766 if(fg == &dc.col[defaultfg]) {
2767 fg = &dc.col[defaultbg];
2768 } else {
2769 colfg.red = ~fg->color.red;
2770 colfg.green = ~fg->color.green;
2771 colfg.blue = ~fg->color.blue;
2772 colfg.alpha = fg->color.alpha;
2773 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2774 fg = &revfg;
2775 }
2776
2777 if(bg == &dc.col[defaultbg]) {
2778 bg = &dc.col[defaultfg];
2779 } else {
2780 colbg.red = ~bg->color.red;
2781 colbg.green = ~bg->color.green;
2782 colbg.blue = ~bg->color.blue;
2783 colbg.alpha = bg->color.alpha;
2784 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2785 bg = &revbg;
2786 }
2787 }
2788
2789 if(base.mode & ATTR_REVERSE) {
2790 temp = fg;
2791 fg = bg;
2792 bg = temp;
2793 }
2794
2795 /* Intelligent cleaning up of the borders. */
2796 if(x == 0) {
2797 xclear(0, (y == 0)? 0 : winy, borderpx,
2798 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2799 }
2800 if(x + charlen >= term.col) {
2801 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2802 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2803 }
2804 if(y == 0)
2805 xclear(winx, 0, winx + width, borderpx);
2806 if(y == term.row-1)
2807 xclear(winx, winy + xw.ch, winx + width, xw.h);
2808
2809 /* Clean up the region we want to draw to. */
2810 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2811
2812 fcsets[0] = font->set;
2813 for(xp = winx; bytelen > 0;) {
2814 /*
2815 * Search for the range in the to be printed string of glyphs
2816 * that are in the main font. Then print that range. If
2817 * some glyph is found that is not in the font, do the
2818 * fallback dance.
2819 */
2820 u8fs = s;
2821 u8fblen = 0;
2822 u8fl = 0;
2823 for(;;) {
2824 u8c = s;
2825 u8cblen = utf8decode(s, &u8char);
2826 s += u8cblen;
2827 bytelen -= u8cblen;
2828
2829 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
2830 if(!doesexist || bytelen <= 0) {
2831 if(bytelen <= 0) {
2832 if(doesexist) {
2833 u8fl++;
2834 u8fblen += u8cblen;
2835 }
2836 }
2837
2838 if(u8fl > 0) {
2839 XftDrawStringUtf8(xw.draw, fg,
2840 font->match, xp,
2841 winy + font->ascent,
2842 (FcChar8 *)u8fs,
2843 u8fblen);
2844 xp += font->width * u8fl;
2845 }
2846 break;
2847 }
2848
2849 u8fl++;
2850 u8fblen += u8cblen;
2851 }
2852 if(doesexist)
2853 break;
2854
2855 frp = frccur;
2856 /* Search the font cache. */
2857 for(i = 0; i < frclen; i++, frp--) {
2858 if(frp <= 0)
2859 frp = LEN(frc) - 1;
2860
2861 if(frc[frp].c == u8char
2862 && frc[frp].flags == frcflags) {
2863 break;
2864 }
2865 }
2866
2867 /* Nothing was found. */
2868 if(i >= frclen) {
2869 /*
2870 * Nothing was found in the cache. Now use
2871 * some dozen of Fontconfig calls to get the
2872 * font for one single character.
2873 */
2874 fcpattern = FcPatternDuplicate(font->pattern);
2875 fccharset = FcCharSetCreate();
2876
2877 FcCharSetAddChar(fccharset, u8char);
2878 FcPatternAddCharSet(fcpattern, FC_CHARSET,
2879 fccharset);
2880 FcPatternAddBool(fcpattern, FC_SCALABLE,
2881 FcTrue);
2882
2883 FcConfigSubstitute(0, fcpattern,
2884 FcMatchPattern);
2885 FcDefaultSubstitute(fcpattern);
2886
2887 fontpattern = FcFontSetMatch(0, fcsets,
2888 FcTrue, fcpattern, &fcres);
2889
2890 /*
2891 * Overwrite or create the new cache entry
2892 * entry.
2893 */
2894 frccur++;
2895 frclen++;
2896 if(frccur >= LEN(frc))
2897 frccur = 0;
2898 if(frclen > LEN(frc)) {
2899 frclen = LEN(frc);
2900 XftFontClose(xw.dpy, frc[frccur].font);
2901 }
2902
2903 frc[frccur].font = XftFontOpenPattern(xw.dpy,
2904 fontpattern);
2905 frc[frccur].c = u8char;
2906 frc[frccur].flags = frcflags;
2907
2908 FcPatternDestroy(fcpattern);
2909 FcCharSetDestroy(fccharset);
2910
2911 frp = frccur;
2912 }
2913
2914 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
2915 xp, winy + frc[frp].font->ascent,
2916 (FcChar8 *)u8c, u8cblen);
2917
2918 xp += font->width;
2919 }
2920
2921 /*
2922 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
2923 winy + font->ascent, (FcChar8 *)s, bytelen);
2924 */
2925
2926 if(base.mode & ATTR_UNDERLINE) {
2927 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
2928 width, 1);
2929 }
2930 }
2931
2932 void
2933 xdrawcursor(void) {
2934 static int oldx = 0, oldy = 0;
2935 int sl;
2936 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs, 0};
2937
2938 LIMIT(oldx, 0, term.col-1);
2939 LIMIT(oldy, 0, term.row-1);
2940
2941 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2942 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2943
2944 /* remove the old cursor */
2945 if(term.line[oldy][oldx].state & GLYPH_SET) {
2946 sl = utf8size(term.line[oldy][oldx].c);
2947 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2948 oldy, 1, sl);
2949 } else {
2950 xtermclear(oldx, oldy, oldx, oldy);
2951 }
2952
2953 /* draw the new one */
2954 if(!(IS_SET(MODE_HIDE))) {
2955 if(!(xw.state & WIN_FOCUSED))
2956 g.bg = defaultucs;
2957
2958 if(IS_SET(MODE_REVERSE))
2959 g.mode |= ATTR_REVERSE, g.fg = defaultcs, g.bg = defaultfg;
2960
2961 sl = utf8size(g.c);
2962 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2963 oldx = term.c.x, oldy = term.c.y;
2964 }
2965 }
2966
2967
2968 void
2969 xsettitle(char *p) {
2970 XTextProperty prop;
2971
2972 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
2973 &prop);
2974 XSetWMName(xw.dpy, xw.win, &prop);
2975 }
2976
2977 void
2978 xresettitle(void) {
2979 xsettitle(opt_title ? opt_title : "st");
2980 }
2981
2982 void
2983 redraw(int timeout) {
2984 struct timespec tv = {0, timeout * 1000};
2985
2986 tfulldirt();
2987 draw();
2988
2989 if(timeout > 0) {
2990 nanosleep(&tv, NULL);
2991 XSync(xw.dpy, False); /* necessary for a good tput flash */
2992 }
2993 }
2994
2995 void
2996 draw(void) {
2997 drawregion(0, 0, term.col, term.row);
2998 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
2999 xw.h, 0, 0);
3000 XSetForeground(xw.dpy, dc.gc,
3001 dc.col[IS_SET(MODE_REVERSE)?
3002 defaultfg : defaultbg].pixel);
3003 }
3004
3005 void
3006 drawregion(int x1, int y1, int x2, int y2) {
3007 int ic, ib, x, y, ox, sl;
3008 Glyph base, new;
3009 char buf[DRAW_BUF_SIZ];
3010 bool ena_sel = sel.bx != -1;
3011
3012 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3013 ena_sel = 0;
3014
3015 if(!(xw.state & WIN_VISIBLE))
3016 return;
3017
3018 for(y = y1; y < y2; y++) {
3019 if(!term.dirty[y])
3020 continue;
3021
3022 xtermclear(0, y, term.col, y);
3023 term.dirty[y] = 0;
3024 base = term.line[y][0];
3025 ic = ib = ox = 0;
3026 for(x = x1; x < x2; x++) {
3027 new = term.line[y][x];
3028 if(ena_sel && *(new.c) && selected(x, y))
3029 new.mode ^= ATTR_REVERSE;
3030 if(ib > 0 && (!(new.state & GLYPH_SET)
3031 || ATTRCMP(base, new)
3032 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3033 xdraws(buf, base, ox, y, ic, ib);
3034 ic = ib = 0;
3035 }
3036 if(new.state & GLYPH_SET) {
3037 if(ib == 0) {
3038 ox = x;
3039 base = new;
3040 }
3041
3042 sl = utf8size(new.c);
3043 memcpy(buf+ib, new.c, sl);
3044 ib += sl;
3045 ++ic;
3046 }
3047 }
3048 if(ib > 0)
3049 xdraws(buf, base, ox, y, ic, ib);
3050 }
3051 xdrawcursor();
3052 }
3053
3054 void
3055 expose(XEvent *ev) {
3056 XExposeEvent *e = &ev->xexpose;
3057
3058 if(xw.state & WIN_REDRAW) {
3059 if(!e->count)
3060 xw.state &= ~WIN_REDRAW;
3061 }
3062 redraw(0);
3063 }
3064
3065 void
3066 visibility(XEvent *ev) {
3067 XVisibilityEvent *e = &ev->xvisibility;
3068
3069 if(e->state == VisibilityFullyObscured) {
3070 xw.state &= ~WIN_VISIBLE;
3071 } else if(!(xw.state & WIN_VISIBLE)) {
3072 /* need a full redraw for next Expose, not just a buf copy */
3073 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3074 }
3075 }
3076
3077 void
3078 unmap(XEvent *ev) {
3079 xw.state &= ~WIN_VISIBLE;
3080 }
3081
3082 void
3083 xseturgency(int add) {
3084 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3085
3086 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3087 XSetWMHints(xw.dpy, xw.win, h);
3088 XFree(h);
3089 }
3090
3091 void
3092 focus(XEvent *ev) {
3093 XFocusChangeEvent *e = &ev->xfocus;
3094
3095 if(e->mode == NotifyGrab)
3096 return;
3097
3098 if(ev->type == FocusIn) {
3099 XSetICFocus(xw.xic);
3100 xw.state |= WIN_FOCUSED;
3101 xseturgency(0);
3102 } else {
3103 XUnsetICFocus(xw.xic);
3104 xw.state &= ~WIN_FOCUSED;
3105 }
3106 }
3107
3108 inline bool
3109 match(uint mask, uint state) {
3110 state &= ~(ignoremod);
3111
3112 if(mask == XK_NO_MOD && state)
3113 return false;
3114 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3115 return false;
3116 if((state & mask) != state)
3117 return false;
3118 return true;
3119 }
3120
3121 void
3122 numlock(const Arg *dummy) {
3123 term.numlock ^= 1;
3124 }
3125
3126 char*
3127 kmap(KeySym k, uint state) {
3128 uint mask;
3129 Key *kp;
3130 int i;
3131
3132 /* Check for mapped keys out of X11 function keys. */
3133 for(i = 0; i < LEN(mappedkeys); i++) {
3134 if(mappedkeys[i] == k)
3135 break;
3136 }
3137 if(i == LEN(mappedkeys)) {
3138 if((k & 0xFFFF) < 0xFD00)
3139 return NULL;
3140 }
3141
3142 for(kp = key; kp < key + LEN(key); kp++) {
3143 mask = kp->mask;
3144
3145 if(kp->k != k)
3146 continue;
3147
3148 if(!match(mask, state))
3149 continue;
3150
3151 if(kp->appkey > 0) {
3152 if(!IS_SET(MODE_APPKEYPAD))
3153 continue;
3154 if(term.numlock && kp->appkey == 2)
3155 continue;
3156 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3157 continue;
3158 }
3159
3160 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3161 (kp->appcursor > 0
3162 && !IS_SET(MODE_APPCURSOR))) {
3163 continue;
3164 }
3165
3166 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3167 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3168 continue;
3169 }
3170
3171 return kp->s;
3172 }
3173
3174 return NULL;
3175 }
3176
3177 void
3178 kpress(XEvent *ev) {
3179 XKeyEvent *e = &ev->xkey;
3180 KeySym ksym;
3181 char xstr[31], buf[32], *customkey, *cp = buf;
3182 int len;
3183 Status status;
3184 Shortcut *bp;
3185
3186 if(IS_SET(MODE_KBDLOCK))
3187 return;
3188
3189 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3190 e->state &= ~Mod2Mask;
3191 /* 1. shortcuts */
3192 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3193 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3194 bp->func(&(bp->arg));
3195 return;
3196 }
3197 }
3198
3199 /* 2. custom keys from config.h */
3200 if((customkey = kmap(ksym, e->state))) {
3201 len = strlen(customkey);
3202 memcpy(buf, customkey, len);
3203 /* 2. hardcoded (overrides X lookup) */
3204 } else {
3205 if(len == 0)
3206 return;
3207
3208 if(len == 1 && e->state & Mod1Mask)
3209 *cp++ = '\033';
3210
3211 memcpy(cp, xstr, len);
3212 len = cp - buf + len;
3213 }
3214
3215 ttywrite(buf, len);
3216 if(IS_SET(MODE_ECHO))
3217 techo(buf, len);
3218 }
3219
3220
3221 void
3222 cmessage(XEvent *e) {
3223 /*
3224 * See xembed specs
3225 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3226 */
3227 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3228 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3229 xw.state |= WIN_FOCUSED;
3230 xseturgency(0);
3231 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3232 xw.state &= ~WIN_FOCUSED;
3233 }
3234 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3235 /* Send SIGHUP to shell */
3236 kill(pid, SIGHUP);
3237 exit(EXIT_SUCCESS);
3238 }
3239 }
3240
3241 void
3242 cresize(int width, int height) {
3243 int col, row;
3244
3245 if(width != 0)
3246 xw.w = width;
3247 if(height != 0)
3248 xw.h = height;
3249
3250 col = (xw.w - 2 * borderpx) / xw.cw;
3251 row = (xw.h - 2 * borderpx) / xw.ch;
3252
3253 tresize(col, row);
3254 xresize(col, row);
3255 ttyresize();
3256 }
3257
3258 void
3259 resize(XEvent *e) {
3260 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3261 return;
3262
3263 cresize(e->xconfigure.width, e->xconfigure.height);
3264 }
3265
3266 void
3267 run(void) {
3268 XEvent ev;
3269 fd_set rfd;
3270 int xfd = XConnectionNumber(xw.dpy), xev;
3271 struct timeval drawtimeout, *tv = NULL, now, last;
3272
3273 gettimeofday(&last, NULL);
3274
3275 for(xev = actionfps;;) {
3276 FD_ZERO(&rfd);
3277 FD_SET(cmdfd, &rfd);
3278 FD_SET(xfd, &rfd);
3279 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3280 if(errno == EINTR)
3281 continue;
3282 die("select failed: %s\n", SERRNO);
3283 }
3284
3285 gettimeofday(&now, NULL);
3286 drawtimeout.tv_sec = 0;
3287 drawtimeout.tv_usec = (1000/xfps) * 1000;
3288 tv = &drawtimeout;
3289
3290 if(FD_ISSET(cmdfd, &rfd))
3291 ttyread();
3292
3293 if(FD_ISSET(xfd, &rfd))
3294 xev = actionfps;
3295
3296 if(TIMEDIFF(now, last) > \
3297 (xev ? (1000/xfps) : (1000/actionfps))) {
3298 while(XPending(xw.dpy)) {
3299 XNextEvent(xw.dpy, &ev);
3300 if(XFilterEvent(&ev, None))
3301 continue;
3302 if(handler[ev.type])
3303 (handler[ev.type])(&ev);
3304 }
3305
3306 draw();
3307 XFlush(xw.dpy);
3308 last = now;
3309
3310 if(xev && !FD_ISSET(xfd, &rfd))
3311 xev--;
3312 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd))
3313 tv = NULL;
3314 }
3315 }
3316 }
3317
3318 int
3319 main(int argc, char *argv[]) {
3320 int i, bitm, xr, yr;
3321 uint wr, hr;
3322
3323 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3324 xw.isfixed = False;
3325
3326 for(i = 1; i < argc; i++) {
3327 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
3328 case 'c':
3329 if(++i < argc)
3330 opt_class = argv[i];
3331 break;
3332 case 'e':
3333 /* eat all remaining arguments */
3334 if(++i < argc)
3335 opt_cmd = &argv[i];
3336 goto run;
3337 case 'f':
3338 if(++i < argc)
3339 opt_font = argv[i];
3340 break;
3341 case 'g':
3342 if(++i >= argc)
3343 break;
3344
3345 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
3346 if(bitm & XValue)
3347 xw.fx = xr;
3348 if(bitm & YValue)
3349 xw.fy = yr;
3350 if(bitm & WidthValue)
3351 xw.fw = (int)wr;
3352 if(bitm & HeightValue)
3353 xw.fh = (int)hr;
3354 if(bitm & XNegative && xw.fx == 0)
3355 xw.fx = -1;
3356 if(bitm & XNegative && xw.fy == 0)
3357 xw.fy = -1;
3358
3359 if(xw.fh != 0 && xw.fw != 0)
3360 xw.isfixed = True;
3361 break;
3362 case 'o':
3363 if(++i < argc)
3364 opt_io = argv[i];
3365 break;
3366 case 't':
3367 if(++i < argc)
3368 opt_title = argv[i];
3369 break;
3370 case 'v':
3371 default:
3372 die(USAGE);
3373 case 'w':
3374 if(++i < argc)
3375 opt_embed = argv[i];
3376 break;
3377 }
3378 }
3379
3380 run:
3381 setlocale(LC_CTYPE, "");
3382 XSetLocaleModifiers("");
3383 tnew(80, 24);
3384 xinit();
3385 ttynew();
3386 selinit();
3387 run();
3388
3389 return 0;
3390 }
3391