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[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, p++;
1305
1306 while(p < csiescseq.buf+csiescseq.len) {
1307 np = NULL;
1308 v = strtol(p, &np, 10);
1309 if(v == LONG_MAX || v == LONG_MIN)
1310 v = -1;
1311 csiescseq.arg[csiescseq.narg] = v;
1312 if(np != NULL)
1313 p = np;
1314
1315 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ) {
1316 csiescseq.narg++, p++;
1317 } else {
1318 csiescseq.mode = *p;
1319 csiescseq.narg++;
1320
1321 return;
1322 }
1323 }
1324 }
1325
1326 /* for absolute user moves, when decom is set */
1327 void
1328 tmoveato(int x, int y) {
1329 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1330 }
1331
1332 void
1333 tmoveto(int x, int y) {
1334 int miny, maxy;
1335
1336 if(term.c.state & CURSOR_ORIGIN) {
1337 miny = term.top;
1338 maxy = term.bot;
1339 } else {
1340 miny = 0;
1341 maxy = term.row - 1;
1342 }
1343 LIMIT(x, 0, term.col-1);
1344 LIMIT(y, miny, maxy);
1345 term.c.state &= ~CURSOR_WRAPNEXT;
1346 term.c.x = x;
1347 term.c.y = y;
1348 }
1349
1350 void
1351 tsetchar(char *c, Glyph *attr, int x, int y) {
1352 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1353 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1354 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1355 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1356 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1357 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1358 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1359 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1360 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1361 };
1362
1363 /*
1364 * The table is proudly stolen from rxvt.
1365 */
1366 if(attr->mode & ATTR_GFX) {
1367 if(c[0] >= 0x41 && c[0] <= 0x7e
1368 && vt100_0[c[0] - 0x41]) {
1369 c = vt100_0[c[0] - 0x41];
1370 }
1371 }
1372
1373 term.dirty[y] = 1;
1374 term.line[y][x] = *attr;
1375 memcpy(term.line[y][x].c, c, UTF_SIZ);
1376 term.line[y][x].state |= GLYPH_SET;
1377 }
1378
1379 void
1380 tclearregion(int x1, int y1, int x2, int y2, int bce) {
1381 int x, y, temp;
1382
1383 if(x1 > x2)
1384 temp = x1, x1 = x2, x2 = temp;
1385 if(y1 > y2)
1386 temp = y1, y1 = y2, y2 = temp;
1387
1388 LIMIT(x1, 0, term.col-1);
1389 LIMIT(x2, 0, term.col-1);
1390 LIMIT(y1, 0, term.row-1);
1391 LIMIT(y2, 0, term.row-1);
1392
1393 for(y = y1; y <= y2; y++) {
1394 term.dirty[y] = 1;
1395 for(x = x1; x <= x2; x++) {
1396 if(bce) {
1397 term.line[y][x] = term.c.attr;
1398 memcpy(term.line[y][x].c, " ", 2);
1399 term.line[y][x].state |= GLYPH_SET;
1400 } else {
1401 term.line[y][x].state = 0;
1402 }
1403 }
1404 }
1405 }
1406
1407 void
1408 tdeletechar(int n) {
1409 int src = term.c.x + n;
1410 int dst = term.c.x;
1411 int size = term.col - src;
1412
1413 term.dirty[term.c.y] = 1;
1414
1415 if(src >= term.col) {
1416 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1417 return;
1418 }
1419
1420 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1421 size * sizeof(Glyph));
1422 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y, 0);
1423 }
1424
1425 void
1426 tinsertblank(int n) {
1427 int src = term.c.x;
1428 int dst = src + n;
1429 int size = term.col - dst;
1430
1431 term.dirty[term.c.y] = 1;
1432
1433 if(dst >= term.col) {
1434 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1435 return;
1436 }
1437
1438 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1439 size * sizeof(Glyph));
1440 tclearregion(src, term.c.y, dst - 1, term.c.y, 0);
1441 }
1442
1443 void
1444 tinsertblankline(int n) {
1445 if(term.c.y < term.top || term.c.y > term.bot)
1446 return;
1447
1448 tscrolldown(term.c.y, n);
1449 }
1450
1451 void
1452 tdeleteline(int n) {
1453 if(term.c.y < term.top || term.c.y > term.bot)
1454 return;
1455
1456 tscrollup(term.c.y, n);
1457 }
1458
1459 void
1460 tsetattr(int *attr, int l) {
1461 int i;
1462
1463 for(i = 0; i < l; i++) {
1464 switch(attr[i]) {
1465 case 0:
1466 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1467 | ATTR_ITALIC | ATTR_BLINK);
1468 term.c.attr.fg = defaultfg;
1469 term.c.attr.bg = defaultbg;
1470 break;
1471 case 1:
1472 term.c.attr.mode |= ATTR_BOLD;
1473 break;
1474 case 3:
1475 term.c.attr.mode |= ATTR_ITALIC;
1476 break;
1477 case 4:
1478 term.c.attr.mode |= ATTR_UNDERLINE;
1479 break;
1480 case 5: /* slow blink */
1481 case 6: /* rapid blink */
1482 term.c.attr.mode |= ATTR_BLINK;
1483 break;
1484 case 7:
1485 term.c.attr.mode |= ATTR_REVERSE;
1486 break;
1487 case 21:
1488 case 22:
1489 term.c.attr.mode &= ~ATTR_BOLD;
1490 break;
1491 case 23:
1492 term.c.attr.mode &= ~ATTR_ITALIC;
1493 break;
1494 case 24:
1495 term.c.attr.mode &= ~ATTR_UNDERLINE;
1496 break;
1497 case 25:
1498 case 26:
1499 term.c.attr.mode &= ~ATTR_BLINK;
1500 break;
1501 case 27:
1502 term.c.attr.mode &= ~ATTR_REVERSE;
1503 break;
1504 case 38:
1505 if(i + 2 < l && attr[i + 1] == 5) {
1506 i += 2;
1507 if(BETWEEN(attr[i], 0, 255)) {
1508 term.c.attr.fg = attr[i];
1509 } else {
1510 fprintf(stderr,
1511 "erresc: bad fgcolor %d\n",
1512 attr[i]);
1513 }
1514 } else {
1515 fprintf(stderr,
1516 "erresc(38): gfx attr %d unknown\n",
1517 attr[i]);
1518 }
1519 break;
1520 case 39:
1521 term.c.attr.fg = defaultfg;
1522 break;
1523 case 48:
1524 if(i + 2 < l && attr[i + 1] == 5) {
1525 i += 2;
1526 if(BETWEEN(attr[i], 0, 255)) {
1527 term.c.attr.bg = attr[i];
1528 } else {
1529 fprintf(stderr,
1530 "erresc: bad bgcolor %d\n",
1531 attr[i]);
1532 }
1533 } else {
1534 fprintf(stderr,
1535 "erresc(48): gfx attr %d unknown\n",
1536 attr[i]);
1537 }
1538 break;
1539 case 49:
1540 term.c.attr.bg = defaultbg;
1541 break;
1542 default:
1543 if(BETWEEN(attr[i], 30, 37)) {
1544 term.c.attr.fg = attr[i] - 30;
1545 } else if(BETWEEN(attr[i], 40, 47)) {
1546 term.c.attr.bg = attr[i] - 40;
1547 } else if(BETWEEN(attr[i], 90, 97)) {
1548 term.c.attr.fg = attr[i] - 90 + 8;
1549 } else if(BETWEEN(attr[i], 100, 107)) {
1550 term.c.attr.bg = attr[i] - 100 + 8;
1551 } else {
1552 fprintf(stderr,
1553 "erresc(default): gfx attr %d unknown\n",
1554 attr[i]), csidump();
1555 }
1556 break;
1557 }
1558 }
1559 }
1560
1561 void
1562 tsetscroll(int t, int b) {
1563 int temp;
1564
1565 LIMIT(t, 0, term.row-1);
1566 LIMIT(b, 0, term.row-1);
1567 if(t > b) {
1568 temp = t;
1569 t = b;
1570 b = temp;
1571 }
1572 term.top = t;
1573 term.bot = b;
1574 }
1575
1576 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1577
1578 void
1579 tsetmode(bool priv, bool set, int *args, int narg) {
1580 int *lim, mode;
1581 bool alt;
1582
1583 for(lim = args + narg; args < lim; ++args) {
1584 if(priv) {
1585 switch(*args) {
1586 break;
1587 case 1: /* DECCKM -- Cursor key */
1588 MODBIT(term.mode, set, MODE_APPCURSOR);
1589 break;
1590 case 5: /* DECSCNM -- Reverse video */
1591 mode = term.mode;
1592 MODBIT(term.mode, set, MODE_REVERSE);
1593 if(mode != term.mode)
1594 redraw(REDRAW_TIMEOUT);
1595 break;
1596 case 6: /* DECOM -- Origin */
1597 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1598 tmoveato(0, 0);
1599 break;
1600 case 7: /* DECAWM -- Auto wrap */
1601 MODBIT(term.mode, set, MODE_WRAP);
1602 break;
1603 case 0: /* Error (IGNORED) */
1604 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1605 case 3: /* DECCOLM -- Column (IGNORED) */
1606 case 4: /* DECSCLM -- Scroll (IGNORED) */
1607 case 8: /* DECARM -- Auto repeat (IGNORED) */
1608 case 18: /* DECPFF -- Printer feed (IGNORED) */
1609 case 19: /* DECPEX -- Printer extent (IGNORED) */
1610 case 42: /* DECNRCM -- National characters (IGNORED) */
1611 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1612 break;
1613 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1614 MODBIT(term.mode, !set, MODE_HIDE);
1615 break;
1616 case 1000: /* 1000,1002: enable xterm mouse report */
1617 MODBIT(term.mode, set, MODE_MOUSEBTN);
1618 MODBIT(term.mode, 0, MODE_MOUSEMOTION);
1619 break;
1620 case 1002:
1621 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1622 MODBIT(term.mode, 0, MODE_MOUSEBTN);
1623 break;
1624 case 1006:
1625 MODBIT(term.mode, set, MODE_MOUSESGR);
1626 break;
1627 case 1049: /* = 1047 and 1048 */
1628 case 47:
1629 case 1047: {
1630 alt = IS_SET(MODE_ALTSCREEN);
1631 if(alt) {
1632 tclearregion(0, 0, term.col-1,
1633 term.row-1, 0);
1634 }
1635 if(set ^ alt) /* set is always 1 or 0 */
1636 tswapscreen();
1637 if(*args != 1049)
1638 break;
1639 }
1640 /* pass through */
1641 case 1048:
1642 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1643 break;
1644 default:
1645 fprintf(stderr,
1646 "erresc: unknown private set/reset mode %d\n",
1647 *args);
1648 break;
1649 }
1650 } else {
1651 switch(*args) {
1652 case 0: /* Error (IGNORED) */
1653 break;
1654 case 2: /* KAM -- keyboard action */
1655 MODBIT(term.mode, set, MODE_KBDLOCK);
1656 break;
1657 case 4: /* IRM -- Insertion-replacement */
1658 MODBIT(term.mode, set, MODE_INSERT);
1659 break;
1660 case 12: /* SRM -- Send/Receive */
1661 MODBIT(term.mode, !set, MODE_ECHO);
1662 break;
1663 case 20: /* LNM -- Linefeed/new line */
1664 MODBIT(term.mode, set, MODE_CRLF);
1665 break;
1666 default:
1667 fprintf(stderr,
1668 "erresc: unknown set/reset mode %d\n",
1669 *args);
1670 break;
1671 }
1672 }
1673 }
1674 }
1675 #undef MODBIT
1676
1677
1678 void
1679 csihandle(void) {
1680 switch(csiescseq.mode) {
1681 default:
1682 unknown:
1683 fprintf(stderr, "erresc: unknown csi ");
1684 csidump();
1685 /* die(""); */
1686 break;
1687 case '@': /* ICH -- Insert <n> blank char */
1688 DEFAULT(csiescseq.arg[0], 1);
1689 tinsertblank(csiescseq.arg[0]);
1690 break;
1691 case 'A': /* CUU -- Cursor <n> Up */
1692 DEFAULT(csiescseq.arg[0], 1);
1693 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1694 break;
1695 case 'B': /* CUD -- Cursor <n> Down */
1696 case 'e': /* VPR --Cursor <n> Down */
1697 DEFAULT(csiescseq.arg[0], 1);
1698 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1699 break;
1700 case 'c': /* DA -- Device Attributes */
1701 if(csiescseq.arg[0] == 0)
1702 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1703 break;
1704 case 'C': /* CUF -- Cursor <n> Forward */
1705 case 'a': /* HPR -- Cursor <n> Forward */
1706 DEFAULT(csiescseq.arg[0], 1);
1707 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1708 break;
1709 case 'D': /* CUB -- Cursor <n> Backward */
1710 DEFAULT(csiescseq.arg[0], 1);
1711 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1712 break;
1713 case 'E': /* CNL -- Cursor <n> Down and first col */
1714 DEFAULT(csiescseq.arg[0], 1);
1715 tmoveto(0, term.c.y+csiescseq.arg[0]);
1716 break;
1717 case 'F': /* CPL -- Cursor <n> Up and first col */
1718 DEFAULT(csiescseq.arg[0], 1);
1719 tmoveto(0, term.c.y-csiescseq.arg[0]);
1720 break;
1721 case 'g': /* TBC -- Tabulation clear */
1722 switch(csiescseq.arg[0]) {
1723 case 0: /* clear current tab stop */
1724 term.tabs[term.c.x] = 0;
1725 break;
1726 case 3: /* clear all the tabs */
1727 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1728 break;
1729 default:
1730 goto unknown;
1731 }
1732 break;
1733 case 'G': /* CHA -- Move to <col> */
1734 case '`': /* HPA */
1735 DEFAULT(csiescseq.arg[0], 1);
1736 tmoveto(csiescseq.arg[0]-1, term.c.y);
1737 break;
1738 case 'H': /* CUP -- Move to <row> <col> */
1739 case 'f': /* HVP */
1740 DEFAULT(csiescseq.arg[0], 1);
1741 DEFAULT(csiescseq.arg[1], 1);
1742 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1743 break;
1744 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1745 DEFAULT(csiescseq.arg[0], 1);
1746 while(csiescseq.arg[0]--)
1747 tputtab(1);
1748 break;
1749 case 'J': /* ED -- Clear screen */
1750 sel.bx = -1;
1751 switch(csiescseq.arg[0]) {
1752 case 0: /* below */
1753 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 1);
1754 if(term.c.y < term.row-1) {
1755 tclearregion(0, term.c.y+1, term.col-1,
1756 term.row-1, 1);
1757 }
1758 break;
1759 case 1: /* above */
1760 if(term.c.y > 1)
1761 tclearregion(0, 0, term.col-1, term.c.y-1, 1);
1762 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1763 break;
1764 case 2: /* all */
1765 tclearregion(0, 0, term.col-1, term.row-1, 1);
1766 break;
1767 default:
1768 goto unknown;
1769 }
1770 break;
1771 case 'K': /* EL -- Clear line */
1772 switch(csiescseq.arg[0]) {
1773 case 0: /* right */
1774 tclearregion(term.c.x, term.c.y, term.col-1,
1775 term.c.y, 1);
1776 break;
1777 case 1: /* left */
1778 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1779 break;
1780 case 2: /* all */
1781 tclearregion(0, term.c.y, term.col-1, term.c.y, 1);
1782 break;
1783 }
1784 break;
1785 case 'S': /* SU -- Scroll <n> line up */
1786 DEFAULT(csiescseq.arg[0], 1);
1787 tscrollup(term.top, csiescseq.arg[0]);
1788 break;
1789 case 'T': /* SD -- Scroll <n> line down */
1790 DEFAULT(csiescseq.arg[0], 1);
1791 tscrolldown(term.top, csiescseq.arg[0]);
1792 break;
1793 case 'L': /* IL -- Insert <n> blank lines */
1794 DEFAULT(csiescseq.arg[0], 1);
1795 tinsertblankline(csiescseq.arg[0]);
1796 break;
1797 case 'l': /* RM -- Reset Mode */
1798 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1799 break;
1800 case 'M': /* DL -- Delete <n> lines */
1801 DEFAULT(csiescseq.arg[0], 1);
1802 tdeleteline(csiescseq.arg[0]);
1803 break;
1804 case 'X': /* ECH -- Erase <n> char */
1805 DEFAULT(csiescseq.arg[0], 1);
1806 tclearregion(term.c.x, term.c.y,
1807 term.c.x + csiescseq.arg[0] - 1, term.c.y, 1);
1808 break;
1809 case 'P': /* DCH -- Delete <n> char */
1810 DEFAULT(csiescseq.arg[0], 1);
1811 tdeletechar(csiescseq.arg[0]);
1812 break;
1813 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1814 DEFAULT(csiescseq.arg[0], 1);
1815 while(csiescseq.arg[0]--)
1816 tputtab(0);
1817 break;
1818 case 'd': /* VPA -- Move to <row> */
1819 DEFAULT(csiescseq.arg[0], 1);
1820 tmoveato(term.c.x, csiescseq.arg[0]-1);
1821 break;
1822 case 'h': /* SM -- Set terminal mode */
1823 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1824 break;
1825 case 'm': /* SGR -- Terminal attribute (color) */
1826 tsetattr(csiescseq.arg, csiescseq.narg);
1827 break;
1828 case 'r': /* DECSTBM -- Set Scrolling Region */
1829 if(csiescseq.priv) {
1830 goto unknown;
1831 } else {
1832 DEFAULT(csiescseq.arg[0], 1);
1833 DEFAULT(csiescseq.arg[1], term.row);
1834 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1835 tmoveato(0, 0);
1836 }
1837 break;
1838 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1839 tcursor(CURSOR_SAVE);
1840 break;
1841 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1842 tcursor(CURSOR_LOAD);
1843 break;
1844 }
1845 }
1846
1847 void
1848 csidump(void) {
1849 int i;
1850 uint c;
1851
1852 printf("ESC[");
1853 for(i = 0; i < csiescseq.len; i++) {
1854 c = csiescseq.buf[i] & 0xff;
1855 if(isprint(c)) {
1856 putchar(c);
1857 } else if(c == '\n') {
1858 printf("(\\n)");
1859 } else if(c == '\r') {
1860 printf("(\\r)");
1861 } else if(c == 0x1b) {
1862 printf("(\\e)");
1863 } else {
1864 printf("(%02x)", c);
1865 }
1866 }
1867 putchar('\n');
1868 }
1869
1870 void
1871 csireset(void) {
1872 memset(&csiescseq, 0, sizeof(csiescseq));
1873 }
1874
1875 void
1876 strhandle(void) {
1877 char *p = NULL;
1878 int i, j, narg;
1879
1880 strparse();
1881 narg = strescseq.narg;
1882
1883 switch(strescseq.type) {
1884 case ']': /* OSC -- Operating System Command */
1885 switch(i = atoi(strescseq.args[0])) {
1886 case 0:
1887 case 1:
1888 case 2:
1889 if(narg > 1)
1890 xsettitle(strescseq.args[1]);
1891 break;
1892 case 4: /* color set */
1893 if(narg < 3)
1894 break;
1895 p = strescseq.args[2];
1896 /* fall through */
1897 case 104: /* color reset, here p = NULL */
1898 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
1899 if (!xsetcolorname(j, p)) {
1900 fprintf(stderr, "erresc: invalid color %s\n", p);
1901 } else {
1902 /*
1903 * TODO if defaultbg color is changed, borders
1904 * are dirty
1905 */
1906 redraw(0);
1907 }
1908 break;
1909 default:
1910 fprintf(stderr, "erresc: unknown str ");
1911 strdump();
1912 break;
1913 }
1914 break;
1915 case 'k': /* old title set compatibility */
1916 xsettitle(strescseq.args[0]);
1917 break;
1918 case 'P': /* DSC -- Device Control String */
1919 case '_': /* APC -- Application Program Command */
1920 case '^': /* PM -- Privacy Message */
1921 default:
1922 fprintf(stderr, "erresc: unknown str ");
1923 strdump();
1924 /* die(""); */
1925 break;
1926 }
1927 }
1928
1929 void
1930 strparse(void) {
1931 /*
1932 * TODO: Implement parsing like for CSI when required.
1933 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1934 */
1935 int narg = 0;
1936 char *start = strescseq.buf, *end = start + strescseq.len;
1937 strescseq.args[0] = start;
1938 while(start < end && narg < LEN(strescseq.args)) {
1939 start = memchr(start, ';', end - start);
1940 if(!start)
1941 break;
1942 *start++ = '\0';
1943 if(start < end) {
1944 strescseq.args[++narg] = start;
1945 }
1946 }
1947 strescseq.narg = narg + 1;
1948 }
1949
1950 void
1951 strdump(void) {
1952 int i;
1953 uint c;
1954
1955 printf("ESC%c", strescseq.type);
1956 for(i = 0; i < strescseq.len; i++) {
1957 c = strescseq.buf[i] & 0xff;
1958 if(isprint(c)) {
1959 putchar(c);
1960 } else if(c == '\n') {
1961 printf("(\\n)");
1962 } else if(c == '\r') {
1963 printf("(\\r)");
1964 } else if(c == 0x1b) {
1965 printf("(\\e)");
1966 } else {
1967 printf("(%02x)", c);
1968 }
1969 }
1970 printf("ESC\\\n");
1971 }
1972
1973 void
1974 strreset(void) {
1975 memset(&strescseq, 0, sizeof(strescseq));
1976 }
1977
1978 void
1979 tputtab(bool forward) {
1980 uint x = term.c.x;
1981
1982 if(forward) {
1983 if(x == term.col)
1984 return;
1985 for(++x; x < term.col && !term.tabs[x]; ++x)
1986 /* nothing */ ;
1987 } else {
1988 if(x == 0)
1989 return;
1990 for(--x; x > 0 && !term.tabs[x]; --x)
1991 /* nothing */ ;
1992 }
1993 tmoveto(x, term.c.y);
1994 }
1995
1996 void
1997 techo(char *buf, int len) {
1998 for(; len > 0; buf++, len--) {
1999 char c = *buf;
2000
2001 if(c == '\033') { /* escape */
2002 tputc("^", 1);
2003 tputc("[", 1);
2004 } else if(c < '\x20') { /* control code */
2005 if(c != '\n' && c != '\r' && c != '\t') {
2006 c |= '\x40';
2007 tputc("^", 1);
2008 }
2009 tputc(&c, 1);
2010 } else {
2011 break;
2012 }
2013 }
2014 if(len)
2015 tputc(buf, len);
2016 }
2017
2018 void
2019 tputc(char *c, int len) {
2020 uchar ascii = *c;
2021 bool control = ascii < '\x20' || ascii == 0177;
2022
2023 if(iofd != -1) {
2024 if(xwrite(iofd, c, len) < 0) {
2025 fprintf(stderr, "Error writing in %s:%s\n",
2026 opt_io, strerror(errno));
2027 close(iofd);
2028 iofd = -1;
2029 }
2030 }
2031
2032 /*
2033 * STR sequences must be checked before anything else
2034 * because it can use some control codes as part of the sequence.
2035 */
2036 if(term.esc & ESC_STR) {
2037 switch(ascii) {
2038 case '\033':
2039 term.esc = ESC_START | ESC_STR_END;
2040 break;
2041 case '\a': /* backwards compatibility to xterm */
2042 term.esc = 0;
2043 strhandle();
2044 break;
2045 default:
2046 if(strescseq.len + len < sizeof(strescseq.buf)) {
2047 memmove(&strescseq.buf[strescseq.len], c, len);
2048 strescseq.len += len;
2049 } else {
2050 /*
2051 * Here is a bug in terminals. If the user never sends
2052 * some code to stop the str or esc command, then st
2053 * will stop responding. But this is better than
2054 * silently failing with unknown characters. At least
2055 * then users will report back.
2056 *
2057 * In the case users ever get fixed, here is the code:
2058 */
2059 /*
2060 * term.esc = 0;
2061 * strhandle();
2062 */
2063 }
2064 }
2065 return;
2066 }
2067
2068 /*
2069 * Actions of control codes must be performed as soon they arrive
2070 * because they can be embedded inside a control sequence, and
2071 * they must not cause conflicts with sequences.
2072 */
2073 if(control) {
2074 switch(ascii) {
2075 case '\t': /* HT */
2076 tputtab(1);
2077 return;
2078 case '\b': /* BS */
2079 tmoveto(term.c.x-1, term.c.y);
2080 return;
2081 case '\r': /* CR */
2082 tmoveto(0, term.c.y);
2083 return;
2084 case '\f': /* LF */
2085 case '\v': /* VT */
2086 case '\n': /* LF */
2087 /* go to first col if the mode is set */
2088 tnewline(IS_SET(MODE_CRLF));
2089 return;
2090 case '\a': /* BEL */
2091 if(!(xw.state & WIN_FOCUSED))
2092 xseturgency(1);
2093 return;
2094 case '\033': /* ESC */
2095 csireset();
2096 term.esc = ESC_START;
2097 return;
2098 case '\016': /* SO */
2099 case '\017': /* SI */
2100 /*
2101 * Different charsets are hard to handle. Applications
2102 * should use the right alt charset escapes for the
2103 * only reason they still exist: line drawing. The
2104 * rest is incompatible history st should not support.
2105 */
2106 return;
2107 case '\032': /* SUB */
2108 case '\030': /* CAN */
2109 csireset();
2110 return;
2111 case '\005': /* ENQ (IGNORED) */
2112 case '\000': /* NUL (IGNORED) */
2113 case '\021': /* XON (IGNORED) */
2114 case '\023': /* XOFF (IGNORED) */
2115 case 0177: /* DEL (IGNORED) */
2116 return;
2117 }
2118 } else if(term.esc & ESC_START) {
2119 if(term.esc & ESC_CSI) {
2120 csiescseq.buf[csiescseq.len++] = ascii;
2121 if(BETWEEN(ascii, 0x40, 0x7E)
2122 || csiescseq.len >= ESC_BUF_SIZ) {
2123 term.esc = 0;
2124 csiparse();
2125 csihandle();
2126 }
2127 } else if(term.esc & ESC_STR_END) {
2128 term.esc = 0;
2129 if(ascii == '\\')
2130 strhandle();
2131 } else if(term.esc & ESC_ALTCHARSET) {
2132 switch(ascii) {
2133 case '0': /* Line drawing set */
2134 term.c.attr.mode |= ATTR_GFX;
2135 break;
2136 case 'B': /* USASCII */
2137 term.c.attr.mode &= ~ATTR_GFX;
2138 break;
2139 case 'A': /* UK (IGNORED) */
2140 case '<': /* multinational charset (IGNORED) */
2141 case '5': /* Finnish (IGNORED) */
2142 case 'C': /* Finnish (IGNORED) */
2143 case 'K': /* German (IGNORED) */
2144 break;
2145 default:
2146 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2147 }
2148 term.esc = 0;
2149 } else if(term.esc & ESC_TEST) {
2150 if(ascii == '8') { /* DEC screen alignment test. */
2151 char E[UTF_SIZ] = "E";
2152 int x, y;
2153
2154 for(x = 0; x < term.col; ++x) {
2155 for(y = 0; y < term.row; ++y)
2156 tsetchar(E, &term.c.attr, x, y);
2157 }
2158 }
2159 term.esc = 0;
2160 } else {
2161 switch(ascii) {
2162 case '[':
2163 term.esc |= ESC_CSI;
2164 break;
2165 case '#':
2166 term.esc |= ESC_TEST;
2167 break;
2168 case 'P': /* DCS -- Device Control String */
2169 case '_': /* APC -- Application Program Command */
2170 case '^': /* PM -- Privacy Message */
2171 case ']': /* OSC -- Operating System Command */
2172 case 'k': /* old title set compatibility */
2173 strreset();
2174 strescseq.type = ascii;
2175 term.esc |= ESC_STR;
2176 break;
2177 case '(': /* set primary charset G0 */
2178 term.esc |= ESC_ALTCHARSET;
2179 break;
2180 case ')': /* set secondary charset G1 (IGNORED) */
2181 case '*': /* set tertiary charset G2 (IGNORED) */
2182 case '+': /* set quaternary charset G3 (IGNORED) */
2183 term.esc = 0;
2184 break;
2185 case 'D': /* IND -- Linefeed */
2186 if(term.c.y == term.bot) {
2187 tscrollup(term.top, 1);
2188 } else {
2189 tmoveto(term.c.x, term.c.y+1);
2190 }
2191 term.esc = 0;
2192 break;
2193 case 'E': /* NEL -- Next line */
2194 tnewline(1); /* always go to first col */
2195 term.esc = 0;
2196 break;
2197 case 'H': /* HTS -- Horizontal tab stop */
2198 term.tabs[term.c.x] = 1;
2199 term.esc = 0;
2200 break;
2201 case 'M': /* RI -- Reverse index */
2202 if(term.c.y == term.top) {
2203 tscrolldown(term.top, 1);
2204 } else {
2205 tmoveto(term.c.x, term.c.y-1);
2206 }
2207 term.esc = 0;
2208 break;
2209 case 'Z': /* DECID -- Identify Terminal */
2210 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2211 term.esc = 0;
2212 break;
2213 case 'c': /* RIS -- Reset to inital state */
2214 treset();
2215 term.esc = 0;
2216 xresettitle();
2217 break;
2218 case '=': /* DECPAM -- Application keypad */
2219 term.mode |= MODE_APPKEYPAD;
2220 term.esc = 0;
2221 break;
2222 case '>': /* DECPNM -- Normal keypad */
2223 term.mode &= ~MODE_APPKEYPAD;
2224 term.esc = 0;
2225 break;
2226 case '7': /* DECSC -- Save Cursor */
2227 tcursor(CURSOR_SAVE);
2228 term.esc = 0;
2229 break;
2230 case '8': /* DECRC -- Restore Cursor */
2231 tcursor(CURSOR_LOAD);
2232 term.esc = 0;
2233 break;
2234 case '\\': /* ST -- Stop */
2235 term.esc = 0;
2236 break;
2237 default:
2238 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2239 (uchar) ascii, isprint(ascii)? ascii:'.');
2240 term.esc = 0;
2241 }
2242 }
2243 /*
2244 * All characters which form part of a sequence are not
2245 * printed
2246 */
2247 return;
2248 }
2249 /*
2250 * Display control codes only if we are in graphic mode
2251 */
2252 if(control && !(term.c.attr.mode & ATTR_GFX))
2253 return;
2254 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2255 sel.bx = -1;
2256 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2257 tnewline(1); /* always go to first col */
2258
2259 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2260 memmove(&term.line[term.c.y][term.c.x+1],
2261 &term.line[term.c.y][term.c.x],
2262 (term.col - term.c.x - 1) * sizeof(Glyph));
2263 }
2264
2265 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2266 if(term.c.x+1 < term.col) {
2267 tmoveto(term.c.x+1, term.c.y);
2268 } else {
2269 term.c.state |= CURSOR_WRAPNEXT;
2270 }
2271 }
2272
2273 int
2274 tresize(int col, int row) {
2275 int i, x;
2276 int minrow = MIN(row, term.row);
2277 int mincol = MIN(col, term.col);
2278 int slide = term.c.y - row + 1;
2279 bool *bp;
2280
2281 if(col < 1 || row < 1)
2282 return 0;
2283
2284 /* free unneeded rows */
2285 i = 0;
2286 if(slide > 0) {
2287 /*
2288 * slide screen to keep cursor where we expect it -
2289 * tscrollup would work here, but we can optimize to
2290 * memmove because we're freeing the earlier lines
2291 */
2292 for(/* i = 0 */; i < slide; i++) {
2293 free(term.line[i]);
2294 free(term.alt[i]);
2295 }
2296 memmove(term.line, term.line + slide, row * sizeof(Line));
2297 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2298 }
2299 for(i += row; i < term.row; i++) {
2300 free(term.line[i]);
2301 free(term.alt[i]);
2302 }
2303
2304 /* resize to new height */
2305 term.line = xrealloc(term.line, row * sizeof(Line));
2306 term.alt = xrealloc(term.alt, row * sizeof(Line));
2307 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2308 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2309
2310 /* resize each row to new width, zero-pad if needed */
2311 for(i = 0; i < minrow; i++) {
2312 term.dirty[i] = 1;
2313 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2314 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2315 for(x = mincol; x < col; x++) {
2316 term.line[i][x].state = 0;
2317 term.alt[i][x].state = 0;
2318 }
2319 }
2320
2321 /* allocate any new rows */
2322 for(/* i == minrow */; i < row; i++) {
2323 term.dirty[i] = 1;
2324 term.line[i] = xcalloc(col, sizeof(Glyph));
2325 term.alt [i] = xcalloc(col, sizeof(Glyph));
2326 }
2327 if(col > term.col) {
2328 bp = term.tabs + term.col;
2329
2330 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2331 while(--bp > term.tabs && !*bp)
2332 /* nothing */ ;
2333 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2334 *bp = 1;
2335 }
2336 /* update terminal size */
2337 term.col = col;
2338 term.row = row;
2339 /* reset scrolling region */
2340 tsetscroll(0, row-1);
2341 /* make use of the LIMIT in tmoveto */
2342 tmoveto(term.c.x, term.c.y);
2343
2344 return (slide > 0);
2345 }
2346
2347 void
2348 xresize(int col, int row) {
2349 xw.tw = MAX(1, col * xw.cw);
2350 xw.th = MAX(1, row * xw.ch);
2351
2352 XFreePixmap(xw.dpy, xw.buf);
2353 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2354 DefaultDepth(xw.dpy, xw.scr));
2355 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg].pixel);
2356 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2357
2358 XftDrawChange(xw.draw, xw.buf);
2359 }
2360
2361 static inline ushort
2362 sixd_to_16bit(int x) {
2363 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2364 }
2365
2366 void
2367 xloadcols(void) {
2368 int i, r, g, b;
2369 XRenderColor color = { .alpha = 0xffff };
2370
2371 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2372 for(i = 0; i < LEN(colorname); i++) {
2373 if(!colorname[i])
2374 continue;
2375 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2376 die("Could not allocate color '%s'\n", colorname[i]);
2377 }
2378 }
2379
2380 /* load colors [16-255] ; same colors as xterm */
2381 for(i = 16, r = 0; r < 6; r++) {
2382 for(g = 0; g < 6; g++) {
2383 for(b = 0; b < 6; b++) {
2384 color.red = sixd_to_16bit(r);
2385 color.green = sixd_to_16bit(g);
2386 color.blue = sixd_to_16bit(b);
2387 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2388 die("Could not allocate color %d\n", i);
2389 }
2390 i++;
2391 }
2392 }
2393 }
2394
2395 for(r = 0; r < 24; r++, i++) {
2396 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2397 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2398 &dc.col[i])) {
2399 die("Could not allocate color %d\n", i);
2400 }
2401 }
2402 }
2403
2404 int
2405 xsetcolorname(int x, const char *name) {
2406 XRenderColor color = { .alpha = 0xffff };
2407 Colour colour;
2408 if (x < 0 || x > LEN(colorname))
2409 return -1;
2410 if(!name) {
2411 if(16 <= x && x < 16 + 216) {
2412 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2413 color.red = sixd_to_16bit(r);
2414 color.green = sixd_to_16bit(g);
2415 color.blue = sixd_to_16bit(b);
2416 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2417 return 0; /* something went wrong */
2418 dc.col[x] = colour;
2419 return 1;
2420 } else if (16 + 216 <= x && x < 256) {
2421 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2422 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2423 return 0; /* something went wrong */
2424 dc.col[x] = colour;
2425 return 1;
2426 } else {
2427 name = colorname[x];
2428 }
2429 }
2430 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2431 return 0;
2432 dc.col[x] = colour;
2433 return 1;
2434 }
2435
2436 void
2437 xtermclear(int col1, int row1, int col2, int row2) {
2438 XftDrawRect(xw.draw,
2439 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2440 borderpx + col1 * xw.cw,
2441 borderpx + row1 * xw.ch,
2442 (col2-col1+1) * xw.cw,
2443 (row2-row1+1) * xw.ch);
2444 }
2445
2446 /*
2447 * Absolute coordinates.
2448 */
2449 void
2450 xclear(int x1, int y1, int x2, int y2) {
2451 XftDrawRect(xw.draw,
2452 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2453 x1, y1, x2-x1, y2-y1);
2454 }
2455
2456 void
2457 xhints(void) {
2458 XClassHint class = {opt_class ? opt_class : termname, termname};
2459 XWMHints wm = {.flags = InputHint, .input = 1};
2460 XSizeHints *sizeh = NULL;
2461
2462 sizeh = XAllocSizeHints();
2463 if(xw.isfixed == False) {
2464 sizeh->flags = PSize | PResizeInc | PBaseSize;
2465 sizeh->height = xw.h;
2466 sizeh->width = xw.w;
2467 sizeh->height_inc = xw.ch;
2468 sizeh->width_inc = xw.cw;
2469 sizeh->base_height = 2 * borderpx;
2470 sizeh->base_width = 2 * borderpx;
2471 } else {
2472 sizeh->flags = PMaxSize | PMinSize;
2473 sizeh->min_width = sizeh->max_width = xw.fw;
2474 sizeh->min_height = sizeh->max_height = xw.fh;
2475 }
2476
2477 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2478 XFree(sizeh);
2479 }
2480
2481 int
2482 xloadfont(Font *f, FcPattern *pattern) {
2483 FcPattern *match;
2484 FcResult result;
2485
2486 match = FcFontMatch(NULL, pattern, &result);
2487 if(!match)
2488 return 1;
2489
2490 if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
2491 FcPatternDestroy(match);
2492 return 1;
2493 }
2494
2495 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2496 FcPatternDestroy(match);
2497 return 1;
2498 }
2499
2500 f->pattern = FcPatternDuplicate(pattern);
2501
2502 f->ascent = f->match->ascent;
2503 f->descent = f->match->descent;
2504 f->lbearing = 0;
2505 f->rbearing = f->match->max_advance_width;
2506
2507 f->height = f->match->height;
2508 f->width = f->lbearing + f->rbearing;
2509
2510 return 0;
2511 }
2512
2513 void
2514 xloadfonts(char *fontstr, int fontsize) {
2515 FcPattern *pattern;
2516 FcResult result;
2517 double fontval;
2518
2519 if(fontstr[0] == '-') {
2520 pattern = XftXlfdParse(fontstr, False, False);
2521 } else {
2522 pattern = FcNameParse((FcChar8 *)fontstr);
2523 }
2524
2525 if(!pattern)
2526 die("st: can't open font %s\n", fontstr);
2527
2528 if(fontsize > 0) {
2529 FcPatternDel(pattern, FC_PIXEL_SIZE);
2530 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2531 usedfontsize = fontsize;
2532 } else {
2533 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2534 if(result == FcResultMatch) {
2535 usedfontsize = (int)fontval;
2536 } else {
2537 /*
2538 * Default font size is 12, if none given. This is to
2539 * have a known usedfontsize value.
2540 */
2541 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2542 usedfontsize = 12;
2543 }
2544 }
2545
2546 FcConfigSubstitute(0, pattern, FcMatchPattern);
2547 FcDefaultSubstitute(pattern);
2548
2549 if(xloadfont(&dc.font, pattern))
2550 die("st: can't open font %s\n", fontstr);
2551
2552 /* Setting character width and height. */
2553 xw.cw = dc.font.width;
2554 xw.ch = dc.font.height;
2555
2556 FcPatternDel(pattern, FC_SLANT);
2557 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2558 if(xloadfont(&dc.ifont, pattern))
2559 die("st: can't open font %s\n", fontstr);
2560
2561 FcPatternDel(pattern, FC_WEIGHT);
2562 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2563 if(xloadfont(&dc.ibfont, pattern))
2564 die("st: can't open font %s\n", fontstr);
2565
2566 FcPatternDel(pattern, FC_SLANT);
2567 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2568 if(xloadfont(&dc.bfont, pattern))
2569 die("st: can't open font %s\n", fontstr);
2570
2571 FcPatternDestroy(pattern);
2572 }
2573
2574 void
2575 xunloadfonts(void) {
2576 int i, ip;
2577
2578 /*
2579 * Free the loaded fonts in the font cache. This is done backwards
2580 * from the frccur.
2581 */
2582 for(i = 0, ip = frccur; i < frclen; i++, ip--) {
2583 if(ip < 0)
2584 ip = LEN(frc) - 1;
2585 XftFontClose(xw.dpy, frc[ip].font);
2586 }
2587 frccur = -1;
2588 frclen = 0;
2589
2590 XftFontClose(xw.dpy, dc.font.match);
2591 FcPatternDestroy(dc.font.pattern);
2592 FcFontSetDestroy(dc.font.set);
2593 XftFontClose(xw.dpy, dc.bfont.match);
2594 FcPatternDestroy(dc.bfont.pattern);
2595 FcFontSetDestroy(dc.bfont.set);
2596 XftFontClose(xw.dpy, dc.ifont.match);
2597 FcPatternDestroy(dc.ifont.pattern);
2598 FcFontSetDestroy(dc.ifont.set);
2599 XftFontClose(xw.dpy, dc.ibfont.match);
2600 FcPatternDestroy(dc.ibfont.pattern);
2601 FcFontSetDestroy(dc.ibfont.set);
2602 }
2603
2604 void
2605 xzoom(const Arg *arg) {
2606 xunloadfonts();
2607 xloadfonts(usedfont, usedfontsize + arg->i);
2608 cresize(0, 0);
2609 redraw(0);
2610 }
2611
2612 void
2613 xinit(void) {
2614 XSetWindowAttributes attrs;
2615 XGCValues gcvalues;
2616 Cursor cursor;
2617 Window parent;
2618 int sw, sh;
2619
2620 if(!(xw.dpy = XOpenDisplay(NULL)))
2621 die("Can't open display\n");
2622 xw.scr = XDefaultScreen(xw.dpy);
2623 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2624
2625 /* font */
2626 if(!FcInit())
2627 die("Could not init fontconfig.\n");
2628
2629 usedfont = (opt_font == NULL)? font : opt_font;
2630 xloadfonts(usedfont, 0);
2631
2632 /* colors */
2633 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2634 xloadcols();
2635
2636 /* adjust fixed window geometry */
2637 if(xw.isfixed) {
2638 sw = DisplayWidth(xw.dpy, xw.scr);
2639 sh = DisplayHeight(xw.dpy, xw.scr);
2640 if(xw.fx < 0)
2641 xw.fx = sw + xw.fx - xw.fw - 1;
2642 if(xw.fy < 0)
2643 xw.fy = sh + xw.fy - xw.fh - 1;
2644
2645 xw.h = xw.fh;
2646 xw.w = xw.fw;
2647 } else {
2648 /* window - default size */
2649 xw.h = 2 * borderpx + term.row * xw.ch;
2650 xw.w = 2 * borderpx + term.col * xw.cw;
2651 xw.fx = 0;
2652 xw.fy = 0;
2653 }
2654
2655 /* Events */
2656 attrs.background_pixel = dc.col[defaultbg].pixel;
2657 attrs.border_pixel = dc.col[defaultbg].pixel;
2658 attrs.bit_gravity = NorthWestGravity;
2659 attrs.event_mask = FocusChangeMask | KeyPressMask
2660 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2661 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2662 attrs.colormap = xw.cmap;
2663
2664 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2665 XRootWindow(xw.dpy, xw.scr);
2666 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2667 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2668 xw.vis,
2669 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2670 | CWColormap,
2671 &attrs);
2672
2673 memset(&gcvalues, 0, sizeof(gcvalues));
2674 gcvalues.graphics_exposures = False;
2675 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2676 &gcvalues);
2677 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2678 DefaultDepth(xw.dpy, xw.scr));
2679 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2680 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2681
2682 /* Xft rendering context */
2683 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2684
2685 /* input methods */
2686 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2687 XSetLocaleModifiers("@im=local");
2688 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2689 XSetLocaleModifiers("@im=");
2690 if((xw.xim = XOpenIM(xw.dpy,
2691 NULL, NULL, NULL)) == NULL) {
2692 die("XOpenIM failed. Could not open input"
2693 " device.\n");
2694 }
2695 }
2696 }
2697 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2698 | XIMStatusNothing, XNClientWindow, xw.win,
2699 XNFocusWindow, xw.win, NULL);
2700 if(xw.xic == NULL)
2701 die("XCreateIC failed. Could not obtain input method.\n");
2702
2703 /* white cursor, black outline */
2704 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2705 XDefineCursor(xw.dpy, xw.win, cursor);
2706 XRecolorCursor(xw.dpy, cursor,
2707 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2708 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2709
2710 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2711 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2712 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2713
2714 xresettitle();
2715 XMapWindow(xw.dpy, xw.win);
2716 xhints();
2717 XSync(xw.dpy, 0);
2718 }
2719
2720 void
2721 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2722 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2723 width = charlen * xw.cw, xp, i;
2724 int frp, frcflags;
2725 int u8fl, u8fblen, u8cblen, doesexist;
2726 char *u8c, *u8fs;
2727 long u8char;
2728 Font *font = &dc.font;
2729 FcResult fcres;
2730 FcPattern *fcpattern, *fontpattern;
2731 FcFontSet *fcsets[] = { NULL };
2732 FcCharSet *fccharset;
2733 Colour *fg = &dc.col[base.fg], *bg = &dc.col[base.bg],
2734 *temp, revfg, revbg;
2735 XRenderColor colfg, colbg;
2736
2737 frcflags = FRC_NORMAL;
2738
2739 if(base.mode & ATTR_BOLD) {
2740 if(BETWEEN(base.fg, 0, 7)) {
2741 /* basic system colors */
2742 fg = &dc.col[base.fg + 8];
2743 } else if(BETWEEN(base.fg, 16, 195)) {
2744 /* 256 colors */
2745 fg = &dc.col[base.fg + 36];
2746 } else if(BETWEEN(base.fg, 232, 251)) {
2747 /* greyscale */
2748 fg = &dc.col[base.fg + 4];
2749 }
2750 /*
2751 * Those ranges will not be brightened:
2752 * 8 - 15 – bright system colors
2753 * 196 - 231 – highest 256 color cube
2754 * 252 - 255 – brightest colors in greyscale
2755 */
2756 font = &dc.bfont;
2757 frcflags = FRC_BOLD;
2758 }
2759
2760 if(base.mode & ATTR_ITALIC) {
2761 font = &dc.ifont;
2762 frcflags = FRC_ITALIC;
2763 }
2764 if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2765 font = &dc.ibfont;
2766 frcflags = FRC_ITALICBOLD;
2767 }
2768
2769 if(IS_SET(MODE_REVERSE)) {
2770 if(fg == &dc.col[defaultfg]) {
2771 fg = &dc.col[defaultbg];
2772 } else {
2773 colfg.red = ~fg->color.red;
2774 colfg.green = ~fg->color.green;
2775 colfg.blue = ~fg->color.blue;
2776 colfg.alpha = fg->color.alpha;
2777 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2778 fg = &revfg;
2779 }
2780
2781 if(bg == &dc.col[defaultbg]) {
2782 bg = &dc.col[defaultfg];
2783 } else {
2784 colbg.red = ~bg->color.red;
2785 colbg.green = ~bg->color.green;
2786 colbg.blue = ~bg->color.blue;
2787 colbg.alpha = bg->color.alpha;
2788 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2789 bg = &revbg;
2790 }
2791 }
2792
2793 if(base.mode & ATTR_REVERSE) {
2794 temp = fg;
2795 fg = bg;
2796 bg = temp;
2797 }
2798
2799 /* Intelligent cleaning up of the borders. */
2800 if(x == 0) {
2801 xclear(0, (y == 0)? 0 : winy, borderpx,
2802 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2803 }
2804 if(x + charlen >= term.col) {
2805 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2806 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2807 }
2808 if(y == 0)
2809 xclear(winx, 0, winx + width, borderpx);
2810 if(y == term.row-1)
2811 xclear(winx, winy + xw.ch, winx + width, xw.h);
2812
2813 /* Clean up the region we want to draw to. */
2814 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2815
2816 fcsets[0] = font->set;
2817 for(xp = winx; bytelen > 0;) {
2818 /*
2819 * Search for the range in the to be printed string of glyphs
2820 * that are in the main font. Then print that range. If
2821 * some glyph is found that is not in the font, do the
2822 * fallback dance.
2823 */
2824 u8fs = s;
2825 u8fblen = 0;
2826 u8fl = 0;
2827 for(;;) {
2828 u8c = s;
2829 u8cblen = utf8decode(s, &u8char);
2830 s += u8cblen;
2831 bytelen -= u8cblen;
2832
2833 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
2834 if(!doesexist || bytelen <= 0) {
2835 if(bytelen <= 0) {
2836 if(doesexist) {
2837 u8fl++;
2838 u8fblen += u8cblen;
2839 }
2840 }
2841
2842 if(u8fl > 0) {
2843 XftDrawStringUtf8(xw.draw, fg,
2844 font->match, xp,
2845 winy + font->ascent,
2846 (FcChar8 *)u8fs,
2847 u8fblen);
2848 xp += font->width * u8fl;
2849 }
2850 break;
2851 }
2852
2853 u8fl++;
2854 u8fblen += u8cblen;
2855 }
2856 if(doesexist)
2857 break;
2858
2859 frp = frccur;
2860 /* Search the font cache. */
2861 for(i = 0; i < frclen; i++, frp--) {
2862 if(frp <= 0)
2863 frp = LEN(frc) - 1;
2864
2865 if(frc[frp].c == u8char
2866 && frc[frp].flags == frcflags) {
2867 break;
2868 }
2869 }
2870
2871 /* Nothing was found. */
2872 if(i >= frclen) {
2873 /*
2874 * Nothing was found in the cache. Now use
2875 * some dozen of Fontconfig calls to get the
2876 * font for one single character.
2877 */
2878 fcpattern = FcPatternDuplicate(font->pattern);
2879 fccharset = FcCharSetCreate();
2880
2881 FcCharSetAddChar(fccharset, u8char);
2882 FcPatternAddCharSet(fcpattern, FC_CHARSET,
2883 fccharset);
2884 FcPatternAddBool(fcpattern, FC_SCALABLE,
2885 FcTrue);
2886
2887 FcConfigSubstitute(0, fcpattern,
2888 FcMatchPattern);
2889 FcDefaultSubstitute(fcpattern);
2890
2891 fontpattern = FcFontSetMatch(0, fcsets,
2892 FcTrue, fcpattern, &fcres);
2893
2894 /*
2895 * Overwrite or create the new cache entry
2896 * entry.
2897 */
2898 frccur++;
2899 frclen++;
2900 if(frccur >= LEN(frc))
2901 frccur = 0;
2902 if(frclen > LEN(frc)) {
2903 frclen = LEN(frc);
2904 XftFontClose(xw.dpy, frc[frccur].font);
2905 }
2906
2907 frc[frccur].font = XftFontOpenPattern(xw.dpy,
2908 fontpattern);
2909 frc[frccur].c = u8char;
2910 frc[frccur].flags = frcflags;
2911
2912 FcPatternDestroy(fcpattern);
2913 FcCharSetDestroy(fccharset);
2914
2915 frp = frccur;
2916 }
2917
2918 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
2919 xp, winy + frc[frp].font->ascent,
2920 (FcChar8 *)u8c, u8cblen);
2921
2922 xp += font->width;
2923 }
2924
2925 /*
2926 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
2927 winy + font->ascent, (FcChar8 *)s, bytelen);
2928 */
2929
2930 if(base.mode & ATTR_UNDERLINE) {
2931 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
2932 width, 1);
2933 }
2934 }
2935
2936 void
2937 xdrawcursor(void) {
2938 static int oldx = 0, oldy = 0;
2939 int sl;
2940 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs, 0};
2941
2942 LIMIT(oldx, 0, term.col-1);
2943 LIMIT(oldy, 0, term.row-1);
2944
2945 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2946 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2947
2948 /* remove the old cursor */
2949 if(term.line[oldy][oldx].state & GLYPH_SET) {
2950 sl = utf8size(term.line[oldy][oldx].c);
2951 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2952 oldy, 1, sl);
2953 } else {
2954 xtermclear(oldx, oldy, oldx, oldy);
2955 }
2956
2957 /* draw the new one */
2958 if(!(IS_SET(MODE_HIDE))) {
2959 if(!(xw.state & WIN_FOCUSED))
2960 g.bg = defaultucs;
2961
2962 if(IS_SET(MODE_REVERSE))
2963 g.mode |= ATTR_REVERSE, g.fg = defaultcs, g.bg = defaultfg;
2964
2965 sl = utf8size(g.c);
2966 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2967 oldx = term.c.x, oldy = term.c.y;
2968 }
2969 }
2970
2971
2972 void
2973 xsettitle(char *p) {
2974 XTextProperty prop;
2975
2976 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
2977 &prop);
2978 XSetWMName(xw.dpy, xw.win, &prop);
2979 }
2980
2981 void
2982 xresettitle(void) {
2983 xsettitle(opt_title ? opt_title : "st");
2984 }
2985
2986 void
2987 redraw(int timeout) {
2988 struct timespec tv = {0, timeout * 1000};
2989
2990 tfulldirt();
2991 draw();
2992
2993 if(timeout > 0) {
2994 nanosleep(&tv, NULL);
2995 XSync(xw.dpy, False); /* necessary for a good tput flash */
2996 }
2997 }
2998
2999 void
3000 draw(void) {
3001 drawregion(0, 0, term.col, term.row);
3002 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3003 xw.h, 0, 0);
3004 XSetForeground(xw.dpy, dc.gc,
3005 dc.col[IS_SET(MODE_REVERSE)?
3006 defaultfg : defaultbg].pixel);
3007 }
3008
3009 void
3010 drawregion(int x1, int y1, int x2, int y2) {
3011 int ic, ib, x, y, ox, sl;
3012 Glyph base, new;
3013 char buf[DRAW_BUF_SIZ];
3014 bool ena_sel = sel.bx != -1;
3015
3016 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3017 ena_sel = 0;
3018
3019 if(!(xw.state & WIN_VISIBLE))
3020 return;
3021
3022 for(y = y1; y < y2; y++) {
3023 if(!term.dirty[y])
3024 continue;
3025
3026 xtermclear(0, y, term.col, y);
3027 term.dirty[y] = 0;
3028 base = term.line[y][0];
3029 ic = ib = ox = 0;
3030 for(x = x1; x < x2; x++) {
3031 new = term.line[y][x];
3032 if(ena_sel && *(new.c) && selected(x, y))
3033 new.mode ^= ATTR_REVERSE;
3034 if(ib > 0 && (!(new.state & GLYPH_SET)
3035 || ATTRCMP(base, new)
3036 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3037 xdraws(buf, base, ox, y, ic, ib);
3038 ic = ib = 0;
3039 }
3040 if(new.state & GLYPH_SET) {
3041 if(ib == 0) {
3042 ox = x;
3043 base = new;
3044 }
3045
3046 sl = utf8size(new.c);
3047 memcpy(buf+ib, new.c, sl);
3048 ib += sl;
3049 ++ic;
3050 }
3051 }
3052 if(ib > 0)
3053 xdraws(buf, base, ox, y, ic, ib);
3054 }
3055 xdrawcursor();
3056 }
3057
3058 void
3059 expose(XEvent *ev) {
3060 XExposeEvent *e = &ev->xexpose;
3061
3062 if(xw.state & WIN_REDRAW) {
3063 if(!e->count)
3064 xw.state &= ~WIN_REDRAW;
3065 }
3066 redraw(0);
3067 }
3068
3069 void
3070 visibility(XEvent *ev) {
3071 XVisibilityEvent *e = &ev->xvisibility;
3072
3073 if(e->state == VisibilityFullyObscured) {
3074 xw.state &= ~WIN_VISIBLE;
3075 } else if(!(xw.state & WIN_VISIBLE)) {
3076 /* need a full redraw for next Expose, not just a buf copy */
3077 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3078 }
3079 }
3080
3081 void
3082 unmap(XEvent *ev) {
3083 xw.state &= ~WIN_VISIBLE;
3084 }
3085
3086 void
3087 xseturgency(int add) {
3088 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3089
3090 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3091 XSetWMHints(xw.dpy, xw.win, h);
3092 XFree(h);
3093 }
3094
3095 void
3096 focus(XEvent *ev) {
3097 XFocusChangeEvent *e = &ev->xfocus;
3098
3099 if(e->mode == NotifyGrab)
3100 return;
3101
3102 if(ev->type == FocusIn) {
3103 XSetICFocus(xw.xic);
3104 xw.state |= WIN_FOCUSED;
3105 xseturgency(0);
3106 } else {
3107 XUnsetICFocus(xw.xic);
3108 xw.state &= ~WIN_FOCUSED;
3109 }
3110 }
3111
3112 inline bool
3113 match(uint mask, uint state) {
3114 state &= ~(ignoremod);
3115
3116 if(mask == XK_NO_MOD && state)
3117 return false;
3118 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3119 return false;
3120 if((state & mask) != state)
3121 return false;
3122 return true;
3123 }
3124
3125 void
3126 numlock(const Arg *dummy) {
3127 term.numlock ^= 1;
3128 }
3129
3130 char*
3131 kmap(KeySym k, uint state) {
3132 uint mask;
3133 Key *kp;
3134 int i;
3135
3136 /* Check for mapped keys out of X11 function keys. */
3137 for(i = 0; i < LEN(mappedkeys); i++) {
3138 if(mappedkeys[i] == k)
3139 break;
3140 }
3141 if(i == LEN(mappedkeys)) {
3142 if((k & 0xFFFF) < 0xFD00)
3143 return NULL;
3144 }
3145
3146 for(kp = key; kp < key + LEN(key); kp++) {
3147 mask = kp->mask;
3148
3149 if(kp->k != k)
3150 continue;
3151
3152 if(!match(mask, state))
3153 continue;
3154
3155 if(kp->appkey > 0) {
3156 if(!IS_SET(MODE_APPKEYPAD))
3157 continue;
3158 if(term.numlock && kp->appkey == 2)
3159 continue;
3160 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3161 continue;
3162 }
3163
3164 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3165 (kp->appcursor > 0
3166 && !IS_SET(MODE_APPCURSOR))) {
3167 continue;
3168 }
3169
3170 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3171 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3172 continue;
3173 }
3174
3175 return kp->s;
3176 }
3177
3178 return NULL;
3179 }
3180
3181 void
3182 kpress(XEvent *ev) {
3183 XKeyEvent *e = &ev->xkey;
3184 KeySym ksym;
3185 char xstr[31], buf[32], *customkey, *cp = buf;
3186 int len;
3187 Status status;
3188 Shortcut *bp;
3189
3190 if(IS_SET(MODE_KBDLOCK))
3191 return;
3192
3193 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3194 e->state &= ~Mod2Mask;
3195 /* 1. shortcuts */
3196 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3197 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3198 bp->func(&(bp->arg));
3199 return;
3200 }
3201 }
3202
3203 /* 2. custom keys from config.h */
3204 if((customkey = kmap(ksym, e->state))) {
3205 len = strlen(customkey);
3206 memcpy(buf, customkey, len);
3207 /* 2. hardcoded (overrides X lookup) */
3208 } else {
3209 if(len == 0)
3210 return;
3211
3212 if(len == 1 && e->state & Mod1Mask)
3213 *cp++ = '\033';
3214
3215 memcpy(cp, xstr, len);
3216 len = cp - buf + len;
3217 }
3218
3219 ttywrite(buf, len);
3220 if(IS_SET(MODE_ECHO))
3221 techo(buf, len);
3222 }
3223
3224
3225 void
3226 cmessage(XEvent *e) {
3227 /*
3228 * See xembed specs
3229 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3230 */
3231 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3232 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3233 xw.state |= WIN_FOCUSED;
3234 xseturgency(0);
3235 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3236 xw.state &= ~WIN_FOCUSED;
3237 }
3238 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3239 /* Send SIGHUP to shell */
3240 kill(pid, SIGHUP);
3241 exit(EXIT_SUCCESS);
3242 }
3243 }
3244
3245 void
3246 cresize(int width, int height) {
3247 int col, row;
3248
3249 if(width != 0)
3250 xw.w = width;
3251 if(height != 0)
3252 xw.h = height;
3253
3254 col = (xw.w - 2 * borderpx) / xw.cw;
3255 row = (xw.h - 2 * borderpx) / xw.ch;
3256
3257 tresize(col, row);
3258 xresize(col, row);
3259 ttyresize();
3260 }
3261
3262 void
3263 resize(XEvent *e) {
3264 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3265 return;
3266
3267 cresize(e->xconfigure.width, e->xconfigure.height);
3268 }
3269
3270 void
3271 run(void) {
3272 XEvent ev;
3273 fd_set rfd;
3274 int xfd = XConnectionNumber(xw.dpy), xev;
3275 struct timeval drawtimeout, *tv = NULL, now, last;
3276
3277 gettimeofday(&last, NULL);
3278
3279 for(xev = actionfps;;) {
3280 FD_ZERO(&rfd);
3281 FD_SET(cmdfd, &rfd);
3282 FD_SET(xfd, &rfd);
3283 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3284 if(errno == EINTR)
3285 continue;
3286 die("select failed: %s\n", SERRNO);
3287 }
3288
3289 gettimeofday(&now, NULL);
3290 drawtimeout.tv_sec = 0;
3291 drawtimeout.tv_usec = (1000/xfps) * 1000;
3292 tv = &drawtimeout;
3293
3294 if(FD_ISSET(cmdfd, &rfd))
3295 ttyread();
3296
3297 if(FD_ISSET(xfd, &rfd))
3298 xev = actionfps;
3299
3300 if(TIMEDIFF(now, last) > \
3301 (xev ? (1000/xfps) : (1000/actionfps))) {
3302 while(XPending(xw.dpy)) {
3303 XNextEvent(xw.dpy, &ev);
3304 if(XFilterEvent(&ev, None))
3305 continue;
3306 if(handler[ev.type])
3307 (handler[ev.type])(&ev);
3308 }
3309
3310 draw();
3311 XFlush(xw.dpy);
3312 last = now;
3313
3314 if(xev && !FD_ISSET(xfd, &rfd))
3315 xev--;
3316 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd))
3317 tv = NULL;
3318 }
3319 }
3320 }
3321
3322 int
3323 main(int argc, char *argv[]) {
3324 int i, bitm, xr, yr;
3325 uint wr, hr;
3326
3327 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3328 xw.isfixed = False;
3329
3330 for(i = 1; i < argc; i++) {
3331 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
3332 case 'c':
3333 if(++i < argc)
3334 opt_class = argv[i];
3335 break;
3336 case 'e':
3337 /* eat all remaining arguments */
3338 if(++i < argc)
3339 opt_cmd = &argv[i];
3340 goto run;
3341 case 'f':
3342 if(++i < argc)
3343 opt_font = argv[i];
3344 break;
3345 case 'g':
3346 if(++i >= argc)
3347 break;
3348
3349 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
3350 if(bitm & XValue)
3351 xw.fx = xr;
3352 if(bitm & YValue)
3353 xw.fy = yr;
3354 if(bitm & WidthValue)
3355 xw.fw = (int)wr;
3356 if(bitm & HeightValue)
3357 xw.fh = (int)hr;
3358 if(bitm & XNegative && xw.fx == 0)
3359 xw.fx = -1;
3360 if(bitm & XNegative && xw.fy == 0)
3361 xw.fy = -1;
3362
3363 if(xw.fh != 0 && xw.fw != 0)
3364 xw.isfixed = True;
3365 break;
3366 case 'o':
3367 if(++i < argc)
3368 opt_io = argv[i];
3369 break;
3370 case 't':
3371 if(++i < argc)
3372 opt_title = argv[i];
3373 break;
3374 case 'v':
3375 default:
3376 die(USAGE);
3377 case 'w':
3378 if(++i < argc)
3379 opt_embed = argv[i];
3380 break;
3381 }
3382 }
3383
3384 run:
3385 setlocale(LC_CTYPE, "");
3386 XSetLocaleModifiers("");
3387 tnew(80, 24);
3388 xinit();
3389 ttynew();
3390 selinit();
3391 run();
3392
3393 return 0;
3394 }
3395