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300e5ec571b19ce24e5f3af43a3a11b4486e908f
[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #define _XOPEN_SOURCE 600
3 #include <ctype.h>
4 #include <errno.h>
5 #include <fcntl.h>
6 #include <limits.h>
7 #include <locale.h>
8 #include <pwd.h>
9 #include <stdarg.h>
10 #include <stdbool.h>
11 #include <stdio.h>
12 #include <stdlib.h>
13 #include <string.h>
14 #include <signal.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <sys/stat.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <sys/wait.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <X11/Xatom.h>
24 #include <X11/Xlib.h>
25 #include <X11/Xutil.h>
26 #include <X11/cursorfont.h>
27 #include <X11/keysym.h>
28 #include <X11/extensions/Xdbe.h>
29 #include <X11/Xft/Xft.h>
30 #include <fontconfig/fontconfig.h>
31
32 #define Glyph Glyph_
33 #define Font Font_
34 #define Draw XftDraw *
35 #define Colour XftColor
36 #define Colourmap Colormap
37
38 #if defined(__linux)
39 #include <pty.h>
40 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
41 #include <util.h>
42 #elif defined(__FreeBSD__) || defined(__DragonFly__)
43 #include <libutil.h>
44 #endif
45
46 #define USAGE \
47 "st " VERSION " (c) 2010-2013 st engineers\n" \
48 "usage: st [-v] [-c class] [-f font] [-g geometry] [-o file]" \
49 " [-t title] [-w windowid] [-e command ...]\n"
50
51 /* XEMBED messages */
52 #define XEMBED_FOCUS_IN 4
53 #define XEMBED_FOCUS_OUT 5
54
55 /* Arbitrary sizes */
56 #define UTF_SIZ 4
57 #define ESC_BUF_SIZ (128*UTF_SIZ)
58 #define ESC_ARG_SIZ 16
59 #define STR_BUF_SIZ ESC_BUF_SIZ
60 #define STR_ARG_SIZ ESC_ARG_SIZ
61 #define DRAW_BUF_SIZ 20*1024
62 #define XK_ANY_MOD UINT_MAX
63 #define XK_NO_MOD 0
64 #define XK_SWITCH_MOD (1<<13)
65
66 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
67
68 /* macros */
69 #define SERRNO strerror(errno)
70 #define MIN(a, b) ((a) < (b) ? (a) : (b))
71 #define MAX(a, b) ((a) < (b) ? (b) : (a))
72 #define LEN(a) (sizeof(a) / sizeof(a[0]))
73 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
74 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
75 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
76 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
77 #define IS_SET(flag) ((term.mode & (flag)) != 0)
78 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
79
80 #define VT102ID "\033[?6c"
81
82 enum glyph_attribute {
83 ATTR_NULL = 0,
84 ATTR_REVERSE = 1,
85 ATTR_UNDERLINE = 2,
86 ATTR_BOLD = 4,
87 ATTR_GFX = 8,
88 ATTR_ITALIC = 16,
89 ATTR_BLINK = 32,
90 };
91
92 enum cursor_movement {
93 CURSOR_SAVE,
94 CURSOR_LOAD
95 };
96
97 enum cursor_state {
98 CURSOR_DEFAULT = 0,
99 CURSOR_WRAPNEXT = 1,
100 CURSOR_ORIGIN = 2
101 };
102
103 enum glyph_state {
104 GLYPH_SET = 1,
105 GLYPH_DIRTY = 2
106 };
107
108 enum term_mode {
109 MODE_WRAP = 1,
110 MODE_INSERT = 2,
111 MODE_APPKEYPAD = 4,
112 MODE_ALTSCREEN = 8,
113 MODE_CRLF = 16,
114 MODE_MOUSEBTN = 32,
115 MODE_MOUSEMOTION = 64,
116 MODE_MOUSE = 32|64,
117 MODE_REVERSE = 128,
118 MODE_KBDLOCK = 256,
119 MODE_HIDE = 512,
120 MODE_ECHO = 1024,
121 MODE_APPCURSOR = 2048,
122 MODE_MOUSESGR = 4096,
123 };
124
125 enum escape_state {
126 ESC_START = 1,
127 ESC_CSI = 2,
128 ESC_STR = 4, /* DSC, OSC, PM, APC */
129 ESC_ALTCHARSET = 8,
130 ESC_STR_END = 16, /* a final string was encountered */
131 ESC_TEST = 32, /* Enter in test mode */
132 };
133
134 enum window_state {
135 WIN_VISIBLE = 1,
136 WIN_REDRAW = 2,
137 WIN_FOCUSED = 4
138 };
139
140 enum selection_type {
141 SEL_REGULAR = 1,
142 SEL_RECTANGULAR = 2
143 };
144
145 /* bit macro */
146 #undef B0
147 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
148
149 typedef unsigned char uchar;
150 typedef unsigned int uint;
151 typedef unsigned long ulong;
152 typedef unsigned short ushort;
153
154 typedef struct {
155 char c[UTF_SIZ]; /* character code */
156 uchar mode; /* attribute flags */
157 ushort fg; /* foreground */
158 ushort bg; /* background */
159 uchar state; /* state flags */
160 } Glyph;
161
162 typedef Glyph *Line;
163
164 typedef struct {
165 Glyph attr; /* current char attributes */
166 int x;
167 int y;
168 char state;
169 } TCursor;
170
171 /* CSI Escape sequence structs */
172 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
173 typedef struct {
174 char buf[ESC_BUF_SIZ]; /* raw string */
175 int len; /* raw string length */
176 char priv;
177 int arg[ESC_ARG_SIZ];
178 int narg; /* nb of args */
179 char mode;
180 } CSIEscape;
181
182 /* STR Escape sequence structs */
183 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
184 typedef struct {
185 char type; /* ESC type ... */
186 char buf[STR_BUF_SIZ]; /* raw string */
187 int len; /* raw string length */
188 char *args[STR_ARG_SIZ];
189 int narg; /* nb of args */
190 } STREscape;
191
192 /* Internal representation of the screen */
193 typedef struct {
194 int row; /* nb row */
195 int col; /* nb col */
196 Line *line; /* screen */
197 Line *alt; /* alternate screen */
198 bool *dirty; /* dirtyness of lines */
199 TCursor c; /* cursor */
200 int top; /* top scroll limit */
201 int bot; /* bottom scroll limit */
202 int mode; /* terminal mode flags */
203 int esc; /* escape state flags */
204 bool numlock; /* lock numbers in keyboard */
205 bool *tabs;
206 } Term;
207
208 /* Purely graphic info */
209 typedef struct {
210 Display *dpy;
211 Colourmap cmap;
212 Window win;
213 Drawable buf;
214 Atom xembed, wmdeletewin;
215 XIM xim;
216 XIC xic;
217 Draw draw;
218 Visual *vis;
219 int scr;
220 bool isfixed; /* is fixed geometry? */
221 int fx, fy, fw, fh; /* fixed geometry */
222 int tw, th; /* tty width and height */
223 int w, h; /* window width and height */
224 int ch; /* char height */
225 int cw; /* char width */
226 char state; /* focus, redraw, visible */
227 } XWindow;
228
229 typedef struct {
230 KeySym k;
231 uint mask;
232 char s[ESC_BUF_SIZ];
233 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
234 signed char appkey; /* application keypad */
235 signed char appcursor; /* application cursor */
236 signed char crlf; /* crlf mode */
237 } Key;
238
239 /* TODO: use better name for vars... */
240 typedef struct {
241 int mode;
242 int type;
243 int bx, by;
244 int ex, ey;
245 struct {
246 int x, y;
247 } b, e;
248 char *clip;
249 Atom xtarget;
250 bool alt;
251 struct timeval tclick1;
252 struct timeval tclick2;
253 } Selection;
254
255 typedef union {
256 int i;
257 unsigned int ui;
258 float f;
259 const void *v;
260 } Arg;
261
262 typedef struct {
263 unsigned int mod;
264 KeySym keysym;
265 void (*func)(const Arg *);
266 const Arg arg;
267 } Shortcut;
268
269 /* function definitions used in config.h */
270 static void xzoom(const Arg *);
271 static void selpaste(const Arg *);
272 static void numlock(const Arg *);
273
274 /* Config.h for applying patches and the configuration. */
275 #include "config.h"
276
277 /* Font structure */
278 typedef struct {
279 int height;
280 int width;
281 int ascent;
282 int descent;
283 short lbearing;
284 short rbearing;
285 XftFont *match;
286 FcFontSet *set;
287 FcPattern *pattern;
288 } Font;
289
290 /* Drawing Context */
291 typedef struct {
292 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
293 Font font, bfont, ifont, ibfont;
294 GC gc;
295 } DC;
296
297 static void die(const char *, ...);
298 static void draw(void);
299 static void redraw(int);
300 static void drawregion(int, int, int, int);
301 static void execsh(void);
302 static void sigchld(int);
303 static void run(void);
304
305 static 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 xloadfont(Font *, FcPattern *);
352 static void xloadfonts(char *, int);
353 static void xresettitle(void);
354 static void xseturgency(int);
355 static void xsetsel(char*);
356 static void xtermclear(int, int, int, int);
357 static void xunloadfonts(void);
358 static void xresize(int, int);
359
360 static void expose(XEvent *);
361 static void visibility(XEvent *);
362 static void unmap(XEvent *);
363 static char *kmap(KeySym, uint);
364 static void kpress(XEvent *);
365 static void cmessage(XEvent *);
366 static void cresize(int, int);
367 static void resize(XEvent *);
368 static void focus(XEvent *);
369 static void brelease(XEvent *);
370 static void bpress(XEvent *);
371 static void bmotion(XEvent *);
372 static void selnotify(XEvent *);
373 static void selclear(XEvent *);
374 static void selrequest(XEvent *);
375
376 static void selinit(void);
377 static inline bool selected(int, int);
378 static void selcopy(void);
379 static void selscroll(int, int);
380
381 static int utf8decode(char *, long *);
382 static int utf8encode(long *, char *);
383 static int utf8size(char *);
384 static int isfullutf8(char *, int);
385
386 static ssize_t xwrite(int, char *, size_t);
387 static void *xmalloc(size_t);
388 static void *xrealloc(void *, size_t);
389 static void *xcalloc(size_t, size_t);
390
391 static void (*handler[LASTEvent])(XEvent *) = {
392 [KeyPress] = kpress,
393 [ClientMessage] = cmessage,
394 [ConfigureNotify] = resize,
395 [VisibilityNotify] = visibility,
396 [UnmapNotify] = unmap,
397 [Expose] = expose,
398 [FocusIn] = focus,
399 [FocusOut] = focus,
400 [MotionNotify] = bmotion,
401 [ButtonPress] = bpress,
402 [ButtonRelease] = brelease,
403 [SelectionClear] = selclear,
404 [SelectionNotify] = selnotify,
405 [SelectionRequest] = selrequest,
406 };
407
408 /* Globals */
409 static DC dc;
410 static XWindow xw;
411 static Term term;
412 static CSIEscape csiescseq;
413 static STREscape strescseq;
414 static int cmdfd;
415 static pid_t pid;
416 static Selection sel;
417 static int iofd = -1;
418 static char **opt_cmd = NULL;
419 static char *opt_io = NULL;
420 static char *opt_title = NULL;
421 static char *opt_embed = NULL;
422 static char *opt_class = NULL;
423 static char *opt_font = NULL;
424
425 bool usedbe = False;
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 selclear(XEvent *e) {
835 if(sel.bx == -1)
836 return;
837 sel.bx = -1;
838 tsetdirt(sel.b.y, sel.e.y);
839 }
840
841 void
842 selrequest(XEvent *e) {
843 XSelectionRequestEvent *xsre;
844 XSelectionEvent xev;
845 Atom xa_targets, string;
846
847 xsre = (XSelectionRequestEvent *) e;
848 xev.type = SelectionNotify;
849 xev.requestor = xsre->requestor;
850 xev.selection = xsre->selection;
851 xev.target = xsre->target;
852 xev.time = xsre->time;
853 /* reject */
854 xev.property = None;
855
856 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
857 if(xsre->target == xa_targets) {
858 /* respond with the supported type */
859 string = sel.xtarget;
860 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
861 XA_ATOM, 32, PropModeReplace,
862 (uchar *) &string, 1);
863 xev.property = xsre->property;
864 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
865 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
866 xsre->target, 8, PropModeReplace,
867 (uchar *) sel.clip, strlen(sel.clip));
868 xev.property = xsre->property;
869 }
870
871 /* all done, send a notification to the listener */
872 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
873 fprintf(stderr, "Error sending SelectionNotify event\n");
874 }
875
876 void
877 xsetsel(char *str) {
878 /* register the selection for both the clipboard and the primary */
879 Atom clipboard;
880
881 free(sel.clip);
882 sel.clip = str;
883
884 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
885
886 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
887 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
888 }
889
890 void
891 brelease(XEvent *e) {
892 struct timeval now;
893
894 if(IS_SET(MODE_MOUSE)) {
895 mousereport(e);
896 return;
897 }
898
899 if(e->xbutton.button == Button2) {
900 selpaste(NULL);
901 } else if(e->xbutton.button == Button1) {
902 sel.mode = 0;
903 getbuttoninfo(e);
904 term.dirty[sel.ey] = 1;
905 if(sel.bx == sel.ex && sel.by == sel.ey) {
906 sel.bx = -1;
907 gettimeofday(&now, NULL);
908
909 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
910 /* triple click on the line */
911 sel.b.x = sel.bx = 0;
912 sel.e.x = sel.ex = term.col;
913 sel.b.y = sel.e.y = sel.ey;
914 selcopy();
915 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
916 /* double click to select word */
917 sel.bx = sel.ex;
918 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
919 term.line[sel.ey][sel.bx-1].c[0] != ' ') {
920 sel.bx--;
921 }
922 sel.b.x = sel.bx;
923 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
924 term.line[sel.ey][sel.ex+1].c[0] != ' ') {
925 sel.ex++;
926 }
927 sel.e.x = sel.ex;
928 sel.b.y = sel.e.y = sel.ey;
929 selcopy();
930 }
931 } else {
932 selcopy();
933 }
934 }
935
936 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
937 gettimeofday(&sel.tclick1, NULL);
938 }
939
940 void
941 bmotion(XEvent *e) {
942 int oldey, oldex;
943
944 if(IS_SET(MODE_MOUSE)) {
945 mousereport(e);
946 return;
947 }
948
949 if(!sel.mode)
950 return;
951
952 oldey = sel.ey;
953 oldex = sel.ex;
954 getbuttoninfo(e);
955
956 if(oldey != sel.ey || oldex != sel.ex) {
957 tsetdirt(sel.b.y, sel.e.y);
958 }
959 }
960
961 void
962 die(const char *errstr, ...) {
963 va_list ap;
964
965 va_start(ap, errstr);
966 vfprintf(stderr, errstr, ap);
967 va_end(ap);
968 exit(EXIT_FAILURE);
969 }
970
971 void
972 execsh(void) {
973 char **args;
974 char *envshell = getenv("SHELL");
975 const struct passwd *pass = getpwuid(getuid());
976 char buf[sizeof(long) * 8 + 1];
977
978 unsetenv("COLUMNS");
979 unsetenv("LINES");
980 unsetenv("TERMCAP");
981
982 if(pass) {
983 setenv("LOGNAME", pass->pw_name, 1);
984 setenv("USER", pass->pw_name, 1);
985 setenv("SHELL", pass->pw_shell, 0);
986 setenv("HOME", pass->pw_dir, 0);
987 }
988
989 snprintf(buf, sizeof(buf), "%lu", xw.win);
990 setenv("WINDOWID", buf, 1);
991
992 signal(SIGCHLD, SIG_DFL);
993 signal(SIGHUP, SIG_DFL);
994 signal(SIGINT, SIG_DFL);
995 signal(SIGQUIT, SIG_DFL);
996 signal(SIGTERM, SIG_DFL);
997 signal(SIGALRM, SIG_DFL);
998
999 DEFAULT(envshell, shell);
1000 setenv("TERM", termname, 1);
1001 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1002 execvp(args[0], args);
1003 exit(EXIT_FAILURE);
1004 }
1005
1006 void
1007 sigchld(int a) {
1008 int stat = 0;
1009
1010 if(waitpid(pid, &stat, 0) < 0)
1011 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1012
1013 if(WIFEXITED(stat)) {
1014 exit(WEXITSTATUS(stat));
1015 } else {
1016 exit(EXIT_FAILURE);
1017 }
1018 }
1019
1020 void
1021 ttynew(void) {
1022 int m, s;
1023 struct winsize w = {term.row, term.col, 0, 0};
1024
1025 /* seems to work fine on linux, openbsd and freebsd */
1026 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1027 die("openpty failed: %s\n", SERRNO);
1028
1029 switch(pid = fork()) {
1030 case -1:
1031 die("fork failed\n");
1032 break;
1033 case 0:
1034 setsid(); /* create a new process group */
1035 dup2(s, STDIN_FILENO);
1036 dup2(s, STDOUT_FILENO);
1037 dup2(s, STDERR_FILENO);
1038 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1039 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1040 close(s);
1041 close(m);
1042 execsh();
1043 break;
1044 default:
1045 close(s);
1046 cmdfd = m;
1047 signal(SIGCHLD, sigchld);
1048 if(opt_io) {
1049 iofd = (!strcmp(opt_io, "-")) ?
1050 STDOUT_FILENO :
1051 open(opt_io, O_WRONLY | O_CREAT, 0666);
1052 if(iofd < 0) {
1053 fprintf(stderr, "Error opening %s:%s\n",
1054 opt_io, strerror(errno));
1055 }
1056 }
1057 }
1058 }
1059
1060 void
1061 dump(char c) {
1062 static int col;
1063
1064 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1065 if(++col % 10 == 0)
1066 fprintf(stderr, "\n");
1067 }
1068
1069 void
1070 ttyread(void) {
1071 static char buf[BUFSIZ];
1072 static int buflen = 0;
1073 char *ptr;
1074 char s[UTF_SIZ];
1075 int charsize; /* size of utf8 char in bytes */
1076 long utf8c;
1077 int ret;
1078
1079 /* append read bytes to unprocessed bytes */
1080 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1081 die("Couldn't read from shell: %s\n", SERRNO);
1082
1083 /* process every complete utf8 char */
1084 buflen += ret;
1085 ptr = buf;
1086 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1087 charsize = utf8decode(ptr, &utf8c);
1088 utf8encode(&utf8c, s);
1089 tputc(s, charsize);
1090 ptr += charsize;
1091 buflen -= charsize;
1092 }
1093
1094 /* keep any uncomplete utf8 char for the next call */
1095 memmove(buf, ptr, buflen);
1096 }
1097
1098 void
1099 ttywrite(const char *s, size_t n) {
1100 if(write(cmdfd, s, n) == -1)
1101 die("write error on tty: %s\n", SERRNO);
1102 }
1103
1104 void
1105 ttyresize(void) {
1106 struct winsize w;
1107
1108 w.ws_row = term.row;
1109 w.ws_col = term.col;
1110 w.ws_xpixel = xw.tw;
1111 w.ws_ypixel = xw.th;
1112 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1113 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1114 }
1115
1116 void
1117 tsetdirt(int top, int bot) {
1118 int i;
1119
1120 LIMIT(top, 0, term.row-1);
1121 LIMIT(bot, 0, term.row-1);
1122
1123 for(i = top; i <= bot; i++)
1124 term.dirty[i] = 1;
1125 }
1126
1127 void
1128 tfulldirt(void) {
1129 tsetdirt(0, term.row-1);
1130 }
1131
1132 void
1133 tcursor(int mode) {
1134 static TCursor c;
1135
1136 if(mode == CURSOR_SAVE) {
1137 c = term.c;
1138 } else if(mode == CURSOR_LOAD) {
1139 term.c = c;
1140 tmoveto(c.x, c.y);
1141 }
1142 }
1143
1144 void
1145 treset(void) {
1146 uint i;
1147
1148 term.c = (TCursor){{
1149 .mode = ATTR_NULL,
1150 .fg = defaultfg,
1151 .bg = defaultbg
1152 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1153
1154 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1155 for(i = tabspaces; i < term.col; i += tabspaces)
1156 term.tabs[i] = 1;
1157 term.top = 0;
1158 term.bot = term.row - 1;
1159 term.mode = MODE_WRAP;
1160
1161 tclearregion(0, 0, term.col-1, term.row-1, 0);
1162 tmoveto(0, 0);
1163 tcursor(CURSOR_SAVE);
1164 }
1165
1166 void
1167 tnew(int col, int row) {
1168 /* set screen size */
1169 term.row = row;
1170 term.col = col;
1171 term.line = xmalloc(term.row * sizeof(Line));
1172 term.alt = xmalloc(term.row * sizeof(Line));
1173 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
1174 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
1175
1176 for(row = 0; row < term.row; row++) {
1177 term.line[row] = xmalloc(term.col * sizeof(Glyph));
1178 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
1179 term.dirty[row] = 0;
1180 }
1181
1182 term.numlock = 1;
1183 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1184 /* setup screen */
1185 treset();
1186 }
1187
1188 void
1189 tswapscreen(void) {
1190 Line *tmp = term.line;
1191
1192 term.line = term.alt;
1193 term.alt = tmp;
1194 term.mode ^= MODE_ALTSCREEN;
1195 tfulldirt();
1196 }
1197
1198 void
1199 tscrolldown(int orig, int n) {
1200 int i;
1201 Line temp;
1202
1203 LIMIT(n, 0, term.bot-orig+1);
1204
1205 tclearregion(0, term.bot-n+1, term.col-1, term.bot, 0);
1206
1207 for(i = term.bot; i >= orig+n; i--) {
1208 temp = term.line[i];
1209 term.line[i] = term.line[i-n];
1210 term.line[i-n] = temp;
1211
1212 term.dirty[i] = 1;
1213 term.dirty[i-n] = 1;
1214 }
1215
1216 selscroll(orig, n);
1217 }
1218
1219 void
1220 tscrollup(int orig, int n) {
1221 int i;
1222 Line temp;
1223 LIMIT(n, 0, term.bot-orig+1);
1224
1225 tclearregion(0, orig, term.col-1, orig+n-1, 0);
1226
1227 for(i = orig; i <= term.bot-n; i++) {
1228 temp = term.line[i];
1229 term.line[i] = term.line[i+n];
1230 term.line[i+n] = temp;
1231
1232 term.dirty[i] = 1;
1233 term.dirty[i+n] = 1;
1234 }
1235
1236 selscroll(orig, -n);
1237 }
1238
1239 void
1240 selscroll(int orig, int n) {
1241 if(sel.bx == -1)
1242 return;
1243
1244 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1245 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1246 sel.bx = -1;
1247 return;
1248 }
1249 switch(sel.type) {
1250 case SEL_REGULAR:
1251 if(sel.by < term.top) {
1252 sel.by = term.top;
1253 sel.bx = 0;
1254 }
1255 if(sel.ey > term.bot) {
1256 sel.ey = term.bot;
1257 sel.ex = term.col;
1258 }
1259 break;
1260 case SEL_RECTANGULAR:
1261 if(sel.by < term.top)
1262 sel.by = term.top;
1263 if(sel.ey > term.bot)
1264 sel.ey = term.bot;
1265 break;
1266 };
1267 sel.b.y = sel.by, sel.b.x = sel.bx;
1268 sel.e.y = sel.ey, sel.e.x = sel.ex;
1269 }
1270 }
1271
1272 void
1273 tnewline(int first_col) {
1274 int y = term.c.y;
1275
1276 if(y == term.bot) {
1277 tscrollup(term.top, 1);
1278 } else {
1279 y++;
1280 }
1281 tmoveto(first_col ? 0 : term.c.x, y);
1282 }
1283
1284 void
1285 csiparse(void) {
1286 /* int noarg = 1; */
1287 char *p = csiescseq.buf;
1288
1289 csiescseq.narg = 0;
1290 if(*p == '?')
1291 csiescseq.priv = 1, p++;
1292
1293 while(p < csiescseq.buf+csiescseq.len) {
1294 while(isdigit(*p)) {
1295 csiescseq.arg[csiescseq.narg] *= 10;
1296 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1297 }
1298 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ) {
1299 csiescseq.narg++, p++;
1300 } else {
1301 csiescseq.mode = *p;
1302 csiescseq.narg++;
1303
1304 return;
1305 }
1306 }
1307 }
1308
1309 /* for absolute user moves, when decom is set */
1310 void
1311 tmoveato(int x, int y) {
1312 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1313 }
1314
1315 void
1316 tmoveto(int x, int y) {
1317 int miny, maxy;
1318
1319 if(term.c.state & CURSOR_ORIGIN) {
1320 miny = term.top;
1321 maxy = term.bot;
1322 } else {
1323 miny = 0;
1324 maxy = term.row - 1;
1325 }
1326 LIMIT(x, 0, term.col-1);
1327 LIMIT(y, miny, maxy);
1328 term.c.state &= ~CURSOR_WRAPNEXT;
1329 term.c.x = x;
1330 term.c.y = y;
1331 }
1332
1333 void
1334 tsetchar(char *c, Glyph *attr, int x, int y) {
1335 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1336 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1337 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1338 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1339 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1340 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1341 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1342 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1343 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1344 };
1345
1346 /*
1347 * The table is proudly stolen from rxvt.
1348 */
1349 if(attr->mode & ATTR_GFX) {
1350 if(c[0] >= 0x41 && c[0] <= 0x7e
1351 && vt100_0[c[0] - 0x41]) {
1352 c = vt100_0[c[0] - 0x41];
1353 }
1354 }
1355
1356 term.dirty[y] = 1;
1357 term.line[y][x] = *attr;
1358 memcpy(term.line[y][x].c, c, UTF_SIZ);
1359 term.line[y][x].state |= GLYPH_SET;
1360 }
1361
1362 void
1363 tclearregion(int x1, int y1, int x2, int y2, int bce) {
1364 int x, y, temp;
1365
1366 if(x1 > x2)
1367 temp = x1, x1 = x2, x2 = temp;
1368 if(y1 > y2)
1369 temp = y1, y1 = y2, y2 = temp;
1370
1371 LIMIT(x1, 0, term.col-1);
1372 LIMIT(x2, 0, term.col-1);
1373 LIMIT(y1, 0, term.row-1);
1374 LIMIT(y2, 0, term.row-1);
1375
1376 for(y = y1; y <= y2; y++) {
1377 term.dirty[y] = 1;
1378 for(x = x1; x <= x2; x++) {
1379 if(bce) {
1380 term.line[y][x] = term.c.attr;
1381 memcpy(term.line[y][x].c, " ", 2);
1382 term.line[y][x].state |= GLYPH_SET;
1383 } else {
1384 term.line[y][x].state = 0;
1385 }
1386 }
1387 }
1388 }
1389
1390 void
1391 tdeletechar(int n) {
1392 int src = term.c.x + n;
1393 int dst = term.c.x;
1394 int size = term.col - src;
1395
1396 term.dirty[term.c.y] = 1;
1397
1398 if(src >= term.col) {
1399 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1400 return;
1401 }
1402
1403 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1404 size * sizeof(Glyph));
1405 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y, 0);
1406 }
1407
1408 void
1409 tinsertblank(int n) {
1410 int src = term.c.x;
1411 int dst = src + n;
1412 int size = term.col - dst;
1413
1414 term.dirty[term.c.y] = 1;
1415
1416 if(dst >= term.col) {
1417 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1418 return;
1419 }
1420
1421 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1422 size * sizeof(Glyph));
1423 tclearregion(src, term.c.y, dst - 1, term.c.y, 0);
1424 }
1425
1426 void
1427 tinsertblankline(int n) {
1428 if(term.c.y < term.top || term.c.y > term.bot)
1429 return;
1430
1431 tscrolldown(term.c.y, n);
1432 }
1433
1434 void
1435 tdeleteline(int n) {
1436 if(term.c.y < term.top || term.c.y > term.bot)
1437 return;
1438
1439 tscrollup(term.c.y, n);
1440 }
1441
1442 void
1443 tsetattr(int *attr, int l) {
1444 int i;
1445
1446 for(i = 0; i < l; i++) {
1447 switch(attr[i]) {
1448 case 0:
1449 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1450 | ATTR_ITALIC | ATTR_BLINK);
1451 term.c.attr.fg = defaultfg;
1452 term.c.attr.bg = defaultbg;
1453 break;
1454 case 1:
1455 term.c.attr.mode |= ATTR_BOLD;
1456 break;
1457 case 3:
1458 term.c.attr.mode |= ATTR_ITALIC;
1459 break;
1460 case 4:
1461 term.c.attr.mode |= ATTR_UNDERLINE;
1462 break;
1463 case 5: /* slow blink */
1464 case 6: /* rapid blink */
1465 term.c.attr.mode |= ATTR_BLINK;
1466 break;
1467 case 7:
1468 term.c.attr.mode |= ATTR_REVERSE;
1469 break;
1470 case 21:
1471 case 22:
1472 term.c.attr.mode &= ~ATTR_BOLD;
1473 break;
1474 case 23:
1475 term.c.attr.mode &= ~ATTR_ITALIC;
1476 break;
1477 case 24:
1478 term.c.attr.mode &= ~ATTR_UNDERLINE;
1479 break;
1480 case 25:
1481 case 26:
1482 term.c.attr.mode &= ~ATTR_BLINK;
1483 break;
1484 case 27:
1485 term.c.attr.mode &= ~ATTR_REVERSE;
1486 break;
1487 case 38:
1488 if(i + 2 < l && attr[i + 1] == 5) {
1489 i += 2;
1490 if(BETWEEN(attr[i], 0, 255)) {
1491 term.c.attr.fg = attr[i];
1492 } else {
1493 fprintf(stderr,
1494 "erresc: bad fgcolor %d\n",
1495 attr[i]);
1496 }
1497 } else {
1498 fprintf(stderr,
1499 "erresc(38): gfx attr %d unknown\n",
1500 attr[i]);
1501 }
1502 break;
1503 case 39:
1504 term.c.attr.fg = defaultfg;
1505 break;
1506 case 48:
1507 if(i + 2 < l && attr[i + 1] == 5) {
1508 i += 2;
1509 if(BETWEEN(attr[i], 0, 255)) {
1510 term.c.attr.bg = attr[i];
1511 } else {
1512 fprintf(stderr,
1513 "erresc: bad bgcolor %d\n",
1514 attr[i]);
1515 }
1516 } else {
1517 fprintf(stderr,
1518 "erresc(48): gfx attr %d unknown\n",
1519 attr[i]);
1520 }
1521 break;
1522 case 49:
1523 term.c.attr.bg = defaultbg;
1524 break;
1525 default:
1526 if(BETWEEN(attr[i], 30, 37)) {
1527 term.c.attr.fg = attr[i] - 30;
1528 } else if(BETWEEN(attr[i], 40, 47)) {
1529 term.c.attr.bg = attr[i] - 40;
1530 } else if(BETWEEN(attr[i], 90, 97)) {
1531 term.c.attr.fg = attr[i] - 90 + 8;
1532 } else if(BETWEEN(attr[i], 100, 107)) {
1533 term.c.attr.bg = attr[i] - 100 + 8;
1534 } else {
1535 fprintf(stderr,
1536 "erresc(default): gfx attr %d unknown\n",
1537 attr[i]), csidump();
1538 }
1539 break;
1540 }
1541 }
1542 }
1543
1544 void
1545 tsetscroll(int t, int b) {
1546 int temp;
1547
1548 LIMIT(t, 0, term.row-1);
1549 LIMIT(b, 0, term.row-1);
1550 if(t > b) {
1551 temp = t;
1552 t = b;
1553 b = temp;
1554 }
1555 term.top = t;
1556 term.bot = b;
1557 }
1558
1559 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1560
1561 void
1562 tsetmode(bool priv, bool set, int *args, int narg) {
1563 int *lim, mode;
1564 bool alt;
1565
1566 for(lim = args + narg; args < lim; ++args) {
1567 if(priv) {
1568 switch(*args) {
1569 break;
1570 case 1: /* DECCKM -- Cursor key */
1571 MODBIT(term.mode, set, MODE_APPCURSOR);
1572 break;
1573 case 5: /* DECSCNM -- Reverse video */
1574 mode = term.mode;
1575 MODBIT(term.mode, set, MODE_REVERSE);
1576 if(mode != term.mode)
1577 redraw(REDRAW_TIMEOUT);
1578 break;
1579 case 6: /* DECOM -- Origin */
1580 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1581 tmoveato(0, 0);
1582 break;
1583 case 7: /* DECAWM -- Auto wrap */
1584 MODBIT(term.mode, set, MODE_WRAP);
1585 break;
1586 case 0: /* Error (IGNORED) */
1587 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1588 case 3: /* DECCOLM -- Column (IGNORED) */
1589 case 4: /* DECSCLM -- Scroll (IGNORED) */
1590 case 8: /* DECARM -- Auto repeat (IGNORED) */
1591 case 18: /* DECPFF -- Printer feed (IGNORED) */
1592 case 19: /* DECPEX -- Printer extent (IGNORED) */
1593 case 42: /* DECNRCM -- National characters (IGNORED) */
1594 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1595 break;
1596 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1597 MODBIT(term.mode, !set, MODE_HIDE);
1598 break;
1599 case 1000: /* 1000,1002: enable xterm mouse report */
1600 MODBIT(term.mode, set, MODE_MOUSEBTN);
1601 MODBIT(term.mode, 0, MODE_MOUSEMOTION);
1602 break;
1603 case 1002:
1604 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1605 MODBIT(term.mode, 0, MODE_MOUSEBTN);
1606 break;
1607 case 1006:
1608 MODBIT(term.mode, set, MODE_MOUSESGR);
1609 break;
1610 case 1049: /* = 1047 and 1048 */
1611 case 47:
1612 case 1047: {
1613 alt = IS_SET(MODE_ALTSCREEN);
1614 if(alt) {
1615 tclearregion(0, 0, term.col-1,
1616 term.row-1, 0);
1617 }
1618 if(set ^ alt) /* set is always 1 or 0 */
1619 tswapscreen();
1620 if(*args != 1049)
1621 break;
1622 }
1623 /* pass through */
1624 case 1048:
1625 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1626 break;
1627 default:
1628 fprintf(stderr,
1629 "erresc: unknown private set/reset mode %d\n",
1630 *args);
1631 break;
1632 }
1633 } else {
1634 switch(*args) {
1635 case 0: /* Error (IGNORED) */
1636 break;
1637 case 2: /* KAM -- keyboard action */
1638 MODBIT(term.mode, set, MODE_KBDLOCK);
1639 break;
1640 case 4: /* IRM -- Insertion-replacement */
1641 MODBIT(term.mode, set, MODE_INSERT);
1642 break;
1643 case 12: /* SRM -- Send/Receive */
1644 MODBIT(term.mode, !set, MODE_ECHO);
1645 break;
1646 case 20: /* LNM -- Linefeed/new line */
1647 MODBIT(term.mode, set, MODE_CRLF);
1648 break;
1649 default:
1650 fprintf(stderr,
1651 "erresc: unknown set/reset mode %d\n",
1652 *args);
1653 break;
1654 }
1655 }
1656 }
1657 }
1658 #undef MODBIT
1659
1660
1661 void
1662 csihandle(void) {
1663 switch(csiescseq.mode) {
1664 default:
1665 unknown:
1666 fprintf(stderr, "erresc: unknown csi ");
1667 csidump();
1668 /* die(""); */
1669 break;
1670 case '@': /* ICH -- Insert <n> blank char */
1671 DEFAULT(csiescseq.arg[0], 1);
1672 tinsertblank(csiescseq.arg[0]);
1673 break;
1674 case 'A': /* CUU -- Cursor <n> Up */
1675 DEFAULT(csiescseq.arg[0], 1);
1676 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1677 break;
1678 case 'B': /* CUD -- Cursor <n> Down */
1679 case 'e': /* VPR --Cursor <n> Down */
1680 DEFAULT(csiescseq.arg[0], 1);
1681 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1682 break;
1683 case 'c': /* DA -- Device Attributes */
1684 if(csiescseq.arg[0] == 0)
1685 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1686 break;
1687 case 'C': /* CUF -- Cursor <n> Forward */
1688 case 'a': /* HPR -- Cursor <n> Forward */
1689 DEFAULT(csiescseq.arg[0], 1);
1690 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1691 break;
1692 case 'D': /* CUB -- Cursor <n> Backward */
1693 DEFAULT(csiescseq.arg[0], 1);
1694 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1695 break;
1696 case 'E': /* CNL -- Cursor <n> Down and first col */
1697 DEFAULT(csiescseq.arg[0], 1);
1698 tmoveto(0, term.c.y+csiescseq.arg[0]);
1699 break;
1700 case 'F': /* CPL -- Cursor <n> Up and first col */
1701 DEFAULT(csiescseq.arg[0], 1);
1702 tmoveto(0, term.c.y-csiescseq.arg[0]);
1703 break;
1704 case 'g': /* TBC -- Tabulation clear */
1705 switch(csiescseq.arg[0]) {
1706 case 0: /* clear current tab stop */
1707 term.tabs[term.c.x] = 0;
1708 break;
1709 case 3: /* clear all the tabs */
1710 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1711 break;
1712 default:
1713 goto unknown;
1714 }
1715 break;
1716 case 'G': /* CHA -- Move to <col> */
1717 case '`': /* HPA */
1718 DEFAULT(csiescseq.arg[0], 1);
1719 tmoveto(csiescseq.arg[0]-1, term.c.y);
1720 break;
1721 case 'H': /* CUP -- Move to <row> <col> */
1722 case 'f': /* HVP */
1723 DEFAULT(csiescseq.arg[0], 1);
1724 DEFAULT(csiescseq.arg[1], 1);
1725 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1726 break;
1727 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1728 DEFAULT(csiescseq.arg[0], 1);
1729 while(csiescseq.arg[0]--)
1730 tputtab(1);
1731 break;
1732 case 'J': /* ED -- Clear screen */
1733 sel.bx = -1;
1734 switch(csiescseq.arg[0]) {
1735 case 0: /* below */
1736 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 1);
1737 if(term.c.y < term.row-1) {
1738 tclearregion(0, term.c.y+1, term.col-1,
1739 term.row-1, 1);
1740 }
1741 break;
1742 case 1: /* above */
1743 if(term.c.y > 1)
1744 tclearregion(0, 0, term.col-1, term.c.y-1, 1);
1745 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1746 break;
1747 case 2: /* all */
1748 tclearregion(0, 0, term.col-1, term.row-1, 1);
1749 break;
1750 default:
1751 goto unknown;
1752 }
1753 break;
1754 case 'K': /* EL -- Clear line */
1755 switch(csiescseq.arg[0]) {
1756 case 0: /* right */
1757 tclearregion(term.c.x, term.c.y, term.col-1,
1758 term.c.y, 1);
1759 break;
1760 case 1: /* left */
1761 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1762 break;
1763 case 2: /* all */
1764 tclearregion(0, term.c.y, term.col-1, term.c.y, 1);
1765 break;
1766 }
1767 break;
1768 case 'S': /* SU -- Scroll <n> line up */
1769 DEFAULT(csiescseq.arg[0], 1);
1770 tscrollup(term.top, csiescseq.arg[0]);
1771 break;
1772 case 'T': /* SD -- Scroll <n> line down */
1773 DEFAULT(csiescseq.arg[0], 1);
1774 tscrolldown(term.top, csiescseq.arg[0]);
1775 break;
1776 case 'L': /* IL -- Insert <n> blank lines */
1777 DEFAULT(csiescseq.arg[0], 1);
1778 tinsertblankline(csiescseq.arg[0]);
1779 break;
1780 case 'l': /* RM -- Reset Mode */
1781 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1782 break;
1783 case 'M': /* DL -- Delete <n> lines */
1784 DEFAULT(csiescseq.arg[0], 1);
1785 tdeleteline(csiescseq.arg[0]);
1786 break;
1787 case 'X': /* ECH -- Erase <n> char */
1788 DEFAULT(csiescseq.arg[0], 1);
1789 tclearregion(term.c.x, term.c.y,
1790 term.c.x + csiescseq.arg[0] - 1, term.c.y, 1);
1791 break;
1792 case 'P': /* DCH -- Delete <n> char */
1793 DEFAULT(csiescseq.arg[0], 1);
1794 tdeletechar(csiescseq.arg[0]);
1795 break;
1796 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1797 DEFAULT(csiescseq.arg[0], 1);
1798 while(csiescseq.arg[0]--)
1799 tputtab(0);
1800 break;
1801 case 'd': /* VPA -- Move to <row> */
1802 DEFAULT(csiescseq.arg[0], 1);
1803 tmoveato(term.c.x, csiescseq.arg[0]-1);
1804 break;
1805 case 'h': /* SM -- Set terminal mode */
1806 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1807 break;
1808 case 'm': /* SGR -- Terminal attribute (color) */
1809 tsetattr(csiescseq.arg, csiescseq.narg);
1810 break;
1811 case 'r': /* DECSTBM -- Set Scrolling Region */
1812 if(csiescseq.priv) {
1813 goto unknown;
1814 } else {
1815 DEFAULT(csiescseq.arg[0], 1);
1816 DEFAULT(csiescseq.arg[1], term.row);
1817 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1818 tmoveato(0, 0);
1819 }
1820 break;
1821 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1822 tcursor(CURSOR_SAVE);
1823 break;
1824 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1825 tcursor(CURSOR_LOAD);
1826 break;
1827 }
1828 }
1829
1830 void
1831 csidump(void) {
1832 int i;
1833 uint c;
1834
1835 printf("ESC[");
1836 for(i = 0; i < csiescseq.len; i++) {
1837 c = csiescseq.buf[i] & 0xff;
1838 if(isprint(c)) {
1839 putchar(c);
1840 } else if(c == '\n') {
1841 printf("(\\n)");
1842 } else if(c == '\r') {
1843 printf("(\\r)");
1844 } else if(c == 0x1b) {
1845 printf("(\\e)");
1846 } else {
1847 printf("(%02x)", c);
1848 }
1849 }
1850 putchar('\n');
1851 }
1852
1853 void
1854 csireset(void) {
1855 memset(&csiescseq, 0, sizeof(csiescseq));
1856 }
1857
1858 void
1859 strhandle(void) {
1860 char *p;
1861
1862 /*
1863 * TODO: make this being useful in case of color palette change.
1864 */
1865 strparse();
1866
1867 p = strescseq.buf;
1868
1869 switch(strescseq.type) {
1870 case ']': /* OSC -- Operating System Command */
1871 switch(p[0]) {
1872 case '0':
1873 case '1':
1874 case '2':
1875 /*
1876 * TODO: Handle special chars in string, like umlauts.
1877 */
1878 if(p[1] == ';') {
1879 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1880 }
1881 break;
1882 case ';':
1883 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1884 break;
1885 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1886 break;
1887 default:
1888 fprintf(stderr, "erresc: unknown str ");
1889 strdump();
1890 break;
1891 }
1892 break;
1893 case 'k': /* old title set compatibility */
1894 XStoreName(xw.dpy, xw.win, strescseq.buf);
1895 break;
1896 case 'P': /* DSC -- Device Control String */
1897 case '_': /* APC -- Application Program Command */
1898 case '^': /* PM -- Privacy Message */
1899 default:
1900 fprintf(stderr, "erresc: unknown str ");
1901 strdump();
1902 /* die(""); */
1903 break;
1904 }
1905 }
1906
1907 void
1908 strparse(void) {
1909 /*
1910 * TODO: Implement parsing like for CSI when required.
1911 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1912 */
1913 return;
1914 }
1915
1916 void
1917 strdump(void) {
1918 int i;
1919 uint c;
1920
1921 printf("ESC%c", strescseq.type);
1922 for(i = 0; i < strescseq.len; i++) {
1923 c = strescseq.buf[i] & 0xff;
1924 if(isprint(c)) {
1925 putchar(c);
1926 } else if(c == '\n') {
1927 printf("(\\n)");
1928 } else if(c == '\r') {
1929 printf("(\\r)");
1930 } else if(c == 0x1b) {
1931 printf("(\\e)");
1932 } else {
1933 printf("(%02x)", c);
1934 }
1935 }
1936 printf("ESC\\\n");
1937 }
1938
1939 void
1940 strreset(void) {
1941 memset(&strescseq, 0, sizeof(strescseq));
1942 }
1943
1944 void
1945 tputtab(bool forward) {
1946 uint x = term.c.x;
1947
1948 if(forward) {
1949 if(x == term.col)
1950 return;
1951 for(++x; x < term.col && !term.tabs[x]; ++x)
1952 /* nothing */ ;
1953 } else {
1954 if(x == 0)
1955 return;
1956 for(--x; x > 0 && !term.tabs[x]; --x)
1957 /* nothing */ ;
1958 }
1959 tmoveto(x, term.c.y);
1960 }
1961
1962 void
1963 techo(char *buf, int len) {
1964 for(; len > 0; buf++, len--) {
1965 char c = *buf;
1966
1967 if(c == '\033') { /* escape */
1968 tputc("^", 1);
1969 tputc("[", 1);
1970 } else if(c < '\x20') { /* control code */
1971 if(c != '\n' && c != '\r' && c != '\t') {
1972 c |= '\x40';
1973 tputc("^", 1);
1974 }
1975 tputc(&c, 1);
1976 } else {
1977 break;
1978 }
1979 }
1980 if(len)
1981 tputc(buf, len);
1982 }
1983
1984 void
1985 tputc(char *c, int len) {
1986 uchar ascii = *c;
1987 bool control = ascii < '\x20' || ascii == 0177;
1988
1989 if(iofd != -1) {
1990 if(xwrite(iofd, c, len) < 0) {
1991 fprintf(stderr, "Error writing in %s:%s\n",
1992 opt_io, strerror(errno));
1993 close(iofd);
1994 iofd = -1;
1995 }
1996 }
1997
1998 /*
1999 * STR sequences must be checked before anything else
2000 * because it can use some control codes as part of the sequence.
2001 */
2002 if(term.esc & ESC_STR) {
2003 switch(ascii) {
2004 case '\033':
2005 term.esc = ESC_START | ESC_STR_END;
2006 break;
2007 case '\a': /* backwards compatibility to xterm */
2008 term.esc = 0;
2009 strhandle();
2010 break;
2011 default:
2012 if(strescseq.len + len < sizeof(strescseq.buf)) {
2013 memmove(&strescseq.buf[strescseq.len], c, len);
2014 strescseq.len += len;
2015 } else {
2016 /*
2017 * Here is a bug in terminals. If the user never sends
2018 * some code to stop the str or esc command, then st
2019 * will stop responding. But this is better than
2020 * silently failing with unknown characters. At least
2021 * then users will report back.
2022 *
2023 * In the case users ever get fixed, here is the code:
2024 */
2025 /*
2026 * term.esc = 0;
2027 * strhandle();
2028 */
2029 }
2030 }
2031 return;
2032 }
2033
2034 /*
2035 * Actions of control codes must be performed as soon they arrive
2036 * because they can be embedded inside a control sequence, and
2037 * they must not cause conflicts with sequences.
2038 */
2039 if(control) {
2040 switch(ascii) {
2041 case '\t': /* HT */
2042 tputtab(1);
2043 return;
2044 case '\b': /* BS */
2045 tmoveto(term.c.x-1, term.c.y);
2046 return;
2047 case '\r': /* CR */
2048 tmoveto(0, term.c.y);
2049 return;
2050 case '\f': /* LF */
2051 case '\v': /* VT */
2052 case '\n': /* LF */
2053 /* go to first col if the mode is set */
2054 tnewline(IS_SET(MODE_CRLF));
2055 return;
2056 case '\a': /* BEL */
2057 if(!(xw.state & WIN_FOCUSED))
2058 xseturgency(1);
2059 return;
2060 case '\033': /* ESC */
2061 csireset();
2062 term.esc = ESC_START;
2063 return;
2064 case '\016': /* SO */
2065 case '\017': /* SI */
2066 /*
2067 * Different charsets are hard to handle. Applications
2068 * should use the right alt charset escapes for the
2069 * only reason they still exist: line drawing. The
2070 * rest is incompatible history st should not support.
2071 */
2072 return;
2073 case '\032': /* SUB */
2074 case '\030': /* CAN */
2075 csireset();
2076 return;
2077 case '\005': /* ENQ (IGNORED) */
2078 case '\000': /* NUL (IGNORED) */
2079 case '\021': /* XON (IGNORED) */
2080 case '\023': /* XOFF (IGNORED) */
2081 case 0177: /* DEL (IGNORED) */
2082 return;
2083 }
2084 } else if(term.esc & ESC_START) {
2085 if(term.esc & ESC_CSI) {
2086 csiescseq.buf[csiescseq.len++] = ascii;
2087 if(BETWEEN(ascii, 0x40, 0x7E)
2088 || csiescseq.len >= ESC_BUF_SIZ) {
2089 term.esc = 0;
2090 csiparse(), csihandle();
2091 }
2092 } else if(term.esc & ESC_STR_END) {
2093 term.esc = 0;
2094 if(ascii == '\\')
2095 strhandle();
2096 } else if(term.esc & ESC_ALTCHARSET) {
2097 switch(ascii) {
2098 case '0': /* Line drawing set */
2099 term.c.attr.mode |= ATTR_GFX;
2100 break;
2101 case 'B': /* USASCII */
2102 term.c.attr.mode &= ~ATTR_GFX;
2103 break;
2104 case 'A': /* UK (IGNORED) */
2105 case '<': /* multinational charset (IGNORED) */
2106 case '5': /* Finnish (IGNORED) */
2107 case 'C': /* Finnish (IGNORED) */
2108 case 'K': /* German (IGNORED) */
2109 break;
2110 default:
2111 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2112 }
2113 term.esc = 0;
2114 } else if(term.esc & ESC_TEST) {
2115 if(ascii == '8') { /* DEC screen alignment test. */
2116 char E[UTF_SIZ] = "E";
2117 int x, y;
2118
2119 for(x = 0; x < term.col; ++x) {
2120 for(y = 0; y < term.row; ++y)
2121 tsetchar(E, &term.c.attr, x, y);
2122 }
2123 }
2124 term.esc = 0;
2125 } else {
2126 switch(ascii) {
2127 case '[':
2128 term.esc |= ESC_CSI;
2129 break;
2130 case '#':
2131 term.esc |= ESC_TEST;
2132 break;
2133 case 'P': /* DCS -- Device Control String */
2134 case '_': /* APC -- Application Program Command */
2135 case '^': /* PM -- Privacy Message */
2136 case ']': /* OSC -- Operating System Command */
2137 case 'k': /* old title set compatibility */
2138 strreset();
2139 strescseq.type = ascii;
2140 term.esc |= ESC_STR;
2141 break;
2142 case '(': /* set primary charset G0 */
2143 term.esc |= ESC_ALTCHARSET;
2144 break;
2145 case ')': /* set secondary charset G1 (IGNORED) */
2146 case '*': /* set tertiary charset G2 (IGNORED) */
2147 case '+': /* set quaternary charset G3 (IGNORED) */
2148 term.esc = 0;
2149 break;
2150 case 'D': /* IND -- Linefeed */
2151 if(term.c.y == term.bot) {
2152 tscrollup(term.top, 1);
2153 } else {
2154 tmoveto(term.c.x, term.c.y+1);
2155 }
2156 term.esc = 0;
2157 break;
2158 case 'E': /* NEL -- Next line */
2159 tnewline(1); /* always go to first col */
2160 term.esc = 0;
2161 break;
2162 case 'H': /* HTS -- Horizontal tab stop */
2163 term.tabs[term.c.x] = 1;
2164 term.esc = 0;
2165 break;
2166 case 'M': /* RI -- Reverse index */
2167 if(term.c.y == term.top) {
2168 tscrolldown(term.top, 1);
2169 } else {
2170 tmoveto(term.c.x, term.c.y-1);
2171 }
2172 term.esc = 0;
2173 break;
2174 case 'Z': /* DECID -- Identify Terminal */
2175 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2176 term.esc = 0;
2177 break;
2178 case 'c': /* RIS -- Reset to inital state */
2179 treset();
2180 term.esc = 0;
2181 xresettitle();
2182 break;
2183 case '=': /* DECPAM -- Application keypad */
2184 term.mode |= MODE_APPKEYPAD;
2185 term.esc = 0;
2186 break;
2187 case '>': /* DECPNM -- Normal keypad */
2188 term.mode &= ~MODE_APPKEYPAD;
2189 term.esc = 0;
2190 break;
2191 case '7': /* DECSC -- Save Cursor */
2192 tcursor(CURSOR_SAVE);
2193 term.esc = 0;
2194 break;
2195 case '8': /* DECRC -- Restore Cursor */
2196 tcursor(CURSOR_LOAD);
2197 term.esc = 0;
2198 break;
2199 case '\\': /* ST -- Stop */
2200 term.esc = 0;
2201 break;
2202 default:
2203 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2204 (uchar) ascii, isprint(ascii)? ascii:'.');
2205 term.esc = 0;
2206 }
2207 }
2208 /*
2209 * All characters which form part of a sequence are not
2210 * printed
2211 */
2212 return;
2213 }
2214 /*
2215 * Display control codes only if we are in graphic mode
2216 */
2217 if(control && !(term.c.attr.mode & ATTR_GFX))
2218 return;
2219 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2220 sel.bx = -1;
2221 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2222 tnewline(1); /* always go to first col */
2223
2224 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2225 memmove(&term.line[term.c.y][term.c.x+1],
2226 &term.line[term.c.y][term.c.x],
2227 (term.col - term.c.x - 1) * sizeof(Glyph));
2228 }
2229
2230 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2231 if(term.c.x+1 < term.col) {
2232 tmoveto(term.c.x+1, term.c.y);
2233 } else {
2234 term.c.state |= CURSOR_WRAPNEXT;
2235 }
2236 }
2237
2238 int
2239 tresize(int col, int row) {
2240 int i, x;
2241 int minrow = MIN(row, term.row);
2242 int mincol = MIN(col, term.col);
2243 int slide = term.c.y - row + 1;
2244 bool *bp;
2245
2246 if(col < 1 || row < 1)
2247 return 0;
2248
2249 /* free unneeded rows */
2250 i = 0;
2251 if(slide > 0) {
2252 /*
2253 * slide screen to keep cursor where we expect it -
2254 * tscrollup would work here, but we can optimize to
2255 * memmove because we're freeing the earlier lines
2256 */
2257 for(/* i = 0 */; i < slide; i++) {
2258 free(term.line[i]);
2259 free(term.alt[i]);
2260 }
2261 memmove(term.line, term.line + slide, row * sizeof(Line));
2262 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2263 }
2264 for(i += row; i < term.row; i++) {
2265 free(term.line[i]);
2266 free(term.alt[i]);
2267 }
2268
2269 /* resize to new height */
2270 term.line = xrealloc(term.line, row * sizeof(Line));
2271 term.alt = xrealloc(term.alt, row * sizeof(Line));
2272 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2273 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2274
2275 /* resize each row to new width, zero-pad if needed */
2276 for(i = 0; i < minrow; i++) {
2277 term.dirty[i] = 1;
2278 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2279 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2280 for(x = mincol; x < col; x++) {
2281 term.line[i][x].state = 0;
2282 term.alt[i][x].state = 0;
2283 }
2284 }
2285
2286 /* allocate any new rows */
2287 for(/* i == minrow */; i < row; i++) {
2288 term.dirty[i] = 1;
2289 term.line[i] = xcalloc(col, sizeof(Glyph));
2290 term.alt [i] = xcalloc(col, sizeof(Glyph));
2291 }
2292 if(col > term.col) {
2293 bp = term.tabs + term.col;
2294
2295 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2296 while(--bp > term.tabs && !*bp)
2297 /* nothing */ ;
2298 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2299 *bp = 1;
2300 }
2301 /* update terminal size */
2302 term.col = col;
2303 term.row = row;
2304 /* reset scrolling region */
2305 tsetscroll(0, row-1);
2306 /* make use of the LIMIT in tmoveto */
2307 tmoveto(term.c.x, term.c.y);
2308
2309 return (slide > 0);
2310 }
2311
2312 void
2313 xresize(int col, int row) {
2314 xw.tw = MAX(1, col * xw.cw);
2315 xw.th = MAX(1, row * xw.ch);
2316
2317 if(!usedbe) {
2318 XFreePixmap(xw.dpy, xw.buf);
2319 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2320 DefaultDepth(xw.dpy, xw.scr));
2321 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg].pixel);
2322 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2323 }
2324
2325 XftDrawChange(xw.draw, xw.buf);
2326 }
2327
2328 void
2329 xloadcols(void) {
2330 int i, r, g, b;
2331 XRenderColor color = { .alpha = 0xffff };
2332
2333 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2334 for(i = 0; i < LEN(colorname); i++) {
2335 if(!colorname[i])
2336 continue;
2337 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2338 die("Could not allocate color '%s'\n", colorname[i]);
2339 }
2340 }
2341
2342 /* load colors [16-255] ; same colors as xterm */
2343 for(i = 16, r = 0; r < 6; r++) {
2344 for(g = 0; g < 6; g++) {
2345 for(b = 0; b < 6; b++) {
2346 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
2347 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
2348 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
2349 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2350 die("Could not allocate color %d\n", i);
2351 }
2352 i++;
2353 }
2354 }
2355 }
2356
2357 for(r = 0; r < 24; r++, i++) {
2358 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2359 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2360 &dc.col[i])) {
2361 die("Could not allocate color %d\n", i);
2362 }
2363 }
2364 }
2365
2366 void
2367 xtermclear(int col1, int row1, int col2, int row2) {
2368 XftDrawRect(xw.draw,
2369 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2370 borderpx + col1 * xw.cw,
2371 borderpx + row1 * xw.ch,
2372 (col2-col1+1) * xw.cw,
2373 (row2-row1+1) * xw.ch);
2374 }
2375
2376 /*
2377 * Absolute coordinates.
2378 */
2379 void
2380 xclear(int x1, int y1, int x2, int y2) {
2381 XftDrawRect(xw.draw,
2382 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2383 x1, y1, x2-x1, y2-y1);
2384 }
2385
2386 void
2387 xhints(void) {
2388 XClassHint class = {opt_class ? opt_class : termname, termname};
2389 XWMHints wm = {.flags = InputHint, .input = 1};
2390 XSizeHints *sizeh = NULL;
2391
2392 sizeh = XAllocSizeHints();
2393 if(xw.isfixed == False) {
2394 sizeh->flags = PSize | PResizeInc | PBaseSize;
2395 sizeh->height = xw.h;
2396 sizeh->width = xw.w;
2397 sizeh->height_inc = xw.ch;
2398 sizeh->width_inc = xw.cw;
2399 sizeh->base_height = 2 * borderpx;
2400 sizeh->base_width = 2 * borderpx;
2401 } else {
2402 sizeh->flags = PMaxSize | PMinSize;
2403 sizeh->min_width = sizeh->max_width = xw.fw;
2404 sizeh->min_height = sizeh->max_height = xw.fh;
2405 }
2406
2407 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2408 XFree(sizeh);
2409 }
2410
2411 int
2412 xloadfont(Font *f, FcPattern *pattern) {
2413 FcPattern *match;
2414 FcResult result;
2415
2416 match = FcFontMatch(NULL, pattern, &result);
2417 if(!match)
2418 return 1;
2419
2420 if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
2421 FcPatternDestroy(match);
2422 return 1;
2423 }
2424
2425 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2426 FcPatternDestroy(match);
2427 return 1;
2428 }
2429
2430 f->pattern = FcPatternDuplicate(pattern);
2431
2432 f->ascent = f->match->ascent;
2433 f->descent = f->match->descent;
2434 f->lbearing = 0;
2435 f->rbearing = f->match->max_advance_width;
2436
2437 f->height = f->match->height;
2438 f->width = f->lbearing + f->rbearing;
2439
2440 return 0;
2441 }
2442
2443 void
2444 xloadfonts(char *fontstr, int fontsize) {
2445 FcPattern *pattern;
2446 FcResult result;
2447 double fontval;
2448
2449 if(fontstr[0] == '-') {
2450 pattern = XftXlfdParse(fontstr, False, False);
2451 } else {
2452 pattern = FcNameParse((FcChar8 *)fontstr);
2453 }
2454
2455 if(!pattern)
2456 die("st: can't open font %s\n", fontstr);
2457
2458 if(fontsize > 0) {
2459 FcPatternDel(pattern, FC_PIXEL_SIZE);
2460 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2461 usedfontsize = fontsize;
2462 } else {
2463 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2464 if(result == FcResultMatch) {
2465 usedfontsize = (int)fontval;
2466 } else {
2467 /*
2468 * Default font size is 12, if none given. This is to
2469 * have a known usedfontsize value.
2470 */
2471 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2472 usedfontsize = 12;
2473 }
2474 }
2475
2476 FcConfigSubstitute(0, pattern, FcMatchPattern);
2477 FcDefaultSubstitute(pattern);
2478
2479 if(xloadfont(&dc.font, pattern))
2480 die("st: can't open font %s\n", fontstr);
2481
2482 /* Setting character width and height. */
2483 xw.cw = dc.font.width;
2484 xw.ch = dc.font.height;
2485
2486 FcPatternDel(pattern, FC_SLANT);
2487 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2488 if(xloadfont(&dc.ifont, pattern))
2489 die("st: can't open font %s\n", fontstr);
2490
2491 FcPatternDel(pattern, FC_WEIGHT);
2492 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2493 if(xloadfont(&dc.ibfont, pattern))
2494 die("st: can't open font %s\n", fontstr);
2495
2496 FcPatternDel(pattern, FC_SLANT);
2497 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2498 if(xloadfont(&dc.bfont, pattern))
2499 die("st: can't open font %s\n", fontstr);
2500
2501 FcPatternDestroy(pattern);
2502 }
2503
2504 void
2505 xunloadfonts(void) {
2506 int i, ip;
2507
2508 /*
2509 * Free the loaded fonts in the font cache. This is done backwards
2510 * from the frccur.
2511 */
2512 for(i = 0, ip = frccur; i < frclen; i++, ip--) {
2513 if(ip < 0)
2514 ip = LEN(frc) - 1;
2515 XftFontClose(xw.dpy, frc[ip].font);
2516 }
2517 frccur = -1;
2518 frclen = 0;
2519
2520 XftFontClose(xw.dpy, dc.font.match);
2521 FcPatternDestroy(dc.font.pattern);
2522 FcFontSetDestroy(dc.font.set);
2523 XftFontClose(xw.dpy, dc.bfont.match);
2524 FcPatternDestroy(dc.bfont.pattern);
2525 FcFontSetDestroy(dc.bfont.set);
2526 XftFontClose(xw.dpy, dc.ifont.match);
2527 FcPatternDestroy(dc.ifont.pattern);
2528 FcFontSetDestroy(dc.ifont.set);
2529 XftFontClose(xw.dpy, dc.ibfont.match);
2530 FcPatternDestroy(dc.ibfont.pattern);
2531 FcFontSetDestroy(dc.ibfont.set);
2532 }
2533
2534 void
2535 xzoom(const Arg *arg) {
2536 xunloadfonts();
2537 xloadfonts(usedfont, usedfontsize + arg->i);
2538 cresize(0, 0);
2539 redraw(0);
2540 }
2541
2542 void
2543 xinit(void) {
2544 XSetWindowAttributes attrs;
2545 XGCValues gcvalues;
2546 Cursor cursor;
2547 Window parent;
2548 int sw, sh, major, minor;
2549
2550 if(!(xw.dpy = XOpenDisplay(NULL)))
2551 die("Can't open display\n");
2552 xw.scr = XDefaultScreen(xw.dpy);
2553 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2554
2555 /* font */
2556 if(!FcInit())
2557 die("Could not init fontconfig.\n");
2558
2559 usedfont = (opt_font == NULL)? font : opt_font;
2560 xloadfonts(usedfont, 0);
2561
2562 /* colors */
2563 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2564 xloadcols();
2565
2566 /* adjust fixed window geometry */
2567 if(xw.isfixed) {
2568 sw = DisplayWidth(xw.dpy, xw.scr);
2569 sh = DisplayHeight(xw.dpy, xw.scr);
2570 if(xw.fx < 0)
2571 xw.fx = sw + xw.fx - xw.fw - 1;
2572 if(xw.fy < 0)
2573 xw.fy = sh + xw.fy - xw.fh - 1;
2574
2575 xw.h = xw.fh;
2576 xw.w = xw.fw;
2577 } else {
2578 /* window - default size */
2579 xw.h = 2 * borderpx + term.row * xw.ch;
2580 xw.w = 2 * borderpx + term.col * xw.cw;
2581 xw.fx = 0;
2582 xw.fy = 0;
2583 }
2584
2585 /* Events */
2586 attrs.background_pixel = dc.col[defaultbg].pixel;
2587 attrs.border_pixel = dc.col[defaultbg].pixel;
2588 attrs.bit_gravity = NorthWestGravity;
2589 attrs.event_mask = FocusChangeMask | KeyPressMask
2590 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2591 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2592 attrs.colormap = xw.cmap;
2593
2594 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2595 XRootWindow(xw.dpy, xw.scr);
2596 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2597 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2598 xw.vis,
2599 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2600 | CWColormap,
2601 &attrs);
2602
2603 /* double buffering */
2604 /*
2605 if(XdbeQueryExtension(xw.dpy, &major, &minor)) {
2606 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win,
2607 XdbeBackground);
2608 usedbe = True;
2609 } else {
2610 */
2611 memset(&gcvalues, 0, sizeof(gcvalues));
2612 gcvalues.graphics_exposures = False;
2613 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2614 &gcvalues);
2615 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2616 DefaultDepth(xw.dpy, xw.scr));
2617 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2618 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2619 //xw.buf = xw.win;
2620 /*
2621 }
2622 */
2623
2624 /* Xft rendering context */
2625 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2626
2627 /* input methods */
2628 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2629 XSetLocaleModifiers("@im=local");
2630 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2631 XSetLocaleModifiers("@im=");
2632 if((xw.xim = XOpenIM(xw.dpy,
2633 NULL, NULL, NULL)) == NULL) {
2634 die("XOpenIM failed. Could not open input"
2635 " device.\n");
2636 }
2637 }
2638 }
2639 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2640 | XIMStatusNothing, XNClientWindow, xw.win,
2641 XNFocusWindow, xw.win, NULL);
2642 if(xw.xic == NULL)
2643 die("XCreateIC failed. Could not obtain input method.\n");
2644
2645 /* white cursor, black outline */
2646 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2647 XDefineCursor(xw.dpy, xw.win, cursor);
2648 XRecolorCursor(xw.dpy, cursor,
2649 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2650 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2651
2652 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2653 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2654 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2655
2656 xresettitle();
2657 XMapWindow(xw.dpy, xw.win);
2658 xhints();
2659 XSync(xw.dpy, 0);
2660 }
2661
2662 void
2663 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2664 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2665 width = charlen * xw.cw, xp, i;
2666 int frp, frcflags;
2667 int u8fl, u8fblen, u8cblen, doesexist;
2668 char *u8c, *u8fs;
2669 long u8char;
2670 Font *font = &dc.font;
2671 FcResult fcres;
2672 FcPattern *fcpattern, *fontpattern;
2673 FcFontSet *fcsets[] = { NULL };
2674 FcCharSet *fccharset;
2675 Colour *fg = &dc.col[base.fg], *bg = &dc.col[base.bg],
2676 *temp, revfg, revbg;
2677 XRenderColor colfg, colbg;
2678
2679 frcflags = FRC_NORMAL;
2680
2681 if(base.mode & ATTR_BOLD) {
2682 if(BETWEEN(base.fg, 0, 7)) {
2683 /* basic system colors */
2684 fg = &dc.col[base.fg + 8];
2685 } else if(BETWEEN(base.fg, 16, 195)) {
2686 /* 256 colors */
2687 fg = &dc.col[base.fg + 36];
2688 } else if(BETWEEN(base.fg, 232, 251)) {
2689 /* greyscale */
2690 fg = &dc.col[base.fg + 4];
2691 }
2692 /*
2693 * Those ranges will not be brightened:
2694 * 8 - 15 – bright system colors
2695 * 196 - 231 – highest 256 color cube
2696 * 252 - 255 – brightest colors in greyscale
2697 */
2698 font = &dc.bfont;
2699 frcflags = FRC_BOLD;
2700 }
2701
2702 if(base.mode & ATTR_ITALIC) {
2703 font = &dc.ifont;
2704 frcflags = FRC_ITALIC;
2705 }
2706 if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2707 font = &dc.ibfont;
2708 frcflags = FRC_ITALICBOLD;
2709 }
2710
2711 if(IS_SET(MODE_REVERSE)) {
2712 if(fg == &dc.col[defaultfg]) {
2713 fg = &dc.col[defaultbg];
2714 } else {
2715 colfg.red = ~fg->color.red;
2716 colfg.green = ~fg->color.green;
2717 colfg.blue = ~fg->color.blue;
2718 colfg.alpha = fg->color.alpha;
2719 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2720 fg = &revfg;
2721 }
2722
2723 if(bg == &dc.col[defaultbg]) {
2724 bg = &dc.col[defaultfg];
2725 } else {
2726 colbg.red = ~bg->color.red;
2727 colbg.green = ~bg->color.green;
2728 colbg.blue = ~bg->color.blue;
2729 colbg.alpha = bg->color.alpha;
2730 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2731 bg = &revbg;
2732 }
2733 }
2734
2735 if(base.mode & ATTR_REVERSE) {
2736 temp = fg;
2737 fg = bg;
2738 bg = temp;
2739 }
2740
2741 /* Intelligent cleaning up of the borders. */
2742 if(x == 0) {
2743 xclear(0, (y == 0)? 0 : winy, borderpx,
2744 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2745 }
2746 if(x + charlen >= term.col) {
2747 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2748 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2749 }
2750 if(y == 0)
2751 xclear(winx, 0, winx + width, borderpx);
2752 if(y == term.row-1)
2753 xclear(winx, winy + xw.ch, winx + width, xw.h);
2754
2755 /* Clean up the region we want to draw to. */
2756 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2757
2758 fcsets[0] = font->set;
2759 for(xp = winx; bytelen > 0;) {
2760 /*
2761 * Search for the range in the to be printed string of glyphs
2762 * that are in the main font. Then print that range. If
2763 * some glyph is found that is not in the font, do the
2764 * fallback dance.
2765 */
2766 u8fs = s;
2767 u8fblen = 0;
2768 u8fl = 0;
2769 for(;;) {
2770 u8c = s;
2771 u8cblen = utf8decode(s, &u8char);
2772 s += u8cblen;
2773 bytelen -= u8cblen;
2774
2775 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
2776 if(!doesexist || bytelen <= 0) {
2777 if(bytelen <= 0) {
2778 if(doesexist) {
2779 u8fl++;
2780 u8fblen += u8cblen;
2781 }
2782 }
2783
2784 if(u8fl > 0) {
2785 XftDrawStringUtf8(xw.draw, fg,
2786 font->match, xp,
2787 winy + font->ascent,
2788 (FcChar8 *)u8fs,
2789 u8fblen);
2790 xp += font->width * u8fl;
2791 }
2792 break;
2793 }
2794
2795 u8fl++;
2796 u8fblen += u8cblen;
2797 }
2798 if(doesexist)
2799 break;
2800
2801 frp = frccur;
2802 /* Search the font cache. */
2803 for(i = 0; i < frclen; i++, frp--) {
2804 if(frp <= 0)
2805 frp = LEN(frc) - 1;
2806
2807 if(frc[frp].c == u8char
2808 && frc[frp].flags == frcflags) {
2809 break;
2810 }
2811 }
2812
2813 /* Nothing was found. */
2814 if(i >= frclen) {
2815 /*
2816 * Nothing was found in the cache. Now use
2817 * some dozen of Fontconfig calls to get the
2818 * font for one single character.
2819 */
2820 fcpattern = FcPatternDuplicate(font->pattern);
2821 fccharset = FcCharSetCreate();
2822
2823 FcCharSetAddChar(fccharset, u8char);
2824 FcPatternAddCharSet(fcpattern, FC_CHARSET,
2825 fccharset);
2826 FcPatternAddBool(fcpattern, FC_SCALABLE,
2827 FcTrue);
2828
2829 FcConfigSubstitute(0, fcpattern,
2830 FcMatchPattern);
2831 FcDefaultSubstitute(fcpattern);
2832
2833 fontpattern = FcFontSetMatch(0, fcsets,
2834 FcTrue, fcpattern, &fcres);
2835
2836 /*
2837 * Overwrite or create the new cache entry
2838 * entry.
2839 */
2840 frccur++;
2841 frclen++;
2842 if(frccur >= LEN(frc))
2843 frccur = 0;
2844 if(frclen > LEN(frc)) {
2845 frclen = LEN(frc);
2846 XftFontClose(xw.dpy, frc[frccur].font);
2847 }
2848
2849 frc[frccur].font = XftFontOpenPattern(xw.dpy,
2850 fontpattern);
2851 frc[frccur].c = u8char;
2852 frc[frccur].flags = frcflags;
2853
2854 FcPatternDestroy(fcpattern);
2855 FcCharSetDestroy(fccharset);
2856
2857 frp = frccur;
2858 }
2859
2860 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
2861 xp, winy + frc[frp].font->ascent,
2862 (FcChar8 *)u8c, u8cblen);
2863
2864 xp += font->width;
2865 }
2866
2867 /*
2868 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
2869 winy + font->ascent, (FcChar8 *)s, bytelen);
2870 */
2871
2872 if(base.mode & ATTR_UNDERLINE) {
2873 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
2874 width, 1);
2875 }
2876 }
2877
2878 void
2879 xdrawcursor(void) {
2880 static int oldx = 0, oldy = 0;
2881 int sl;
2882 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs, 0};
2883
2884 LIMIT(oldx, 0, term.col-1);
2885 LIMIT(oldy, 0, term.row-1);
2886
2887 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2888 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2889
2890 /* remove the old cursor */
2891 if(term.line[oldy][oldx].state & GLYPH_SET) {
2892 sl = utf8size(term.line[oldy][oldx].c);
2893 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2894 oldy, 1, sl);
2895 } else {
2896 xtermclear(oldx, oldy, oldx, oldy);
2897 }
2898
2899 /* draw the new one */
2900 if(!(IS_SET(MODE_HIDE))) {
2901 if(!(xw.state & WIN_FOCUSED))
2902 g.bg = defaultucs;
2903
2904 if(IS_SET(MODE_REVERSE))
2905 g.mode |= ATTR_REVERSE, g.fg = defaultcs, g.bg = defaultfg;
2906
2907 sl = utf8size(g.c);
2908 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2909 oldx = term.c.x, oldy = term.c.y;
2910 }
2911 }
2912
2913 void
2914 xresettitle(void) {
2915 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
2916 }
2917
2918 void
2919 redraw(int timeout) {
2920 struct timespec tv = {0, timeout * 1000};
2921
2922 tfulldirt();
2923 draw();
2924
2925 if(timeout > 0) {
2926 nanosleep(&tv, NULL);
2927 XSync(xw.dpy, False); /* necessary for a good tput flash */
2928 }
2929 }
2930
2931 void
2932 draw(void) {
2933 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2934
2935 drawregion(0, 0, term.col, term.row);
2936 if(usedbe) {
2937 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2938 } else {
2939 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
2940 xw.h, 0, 0);
2941 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg].pixel);
2942 }
2943 }
2944
2945 void
2946 drawregion(int x1, int y1, int x2, int y2) {
2947 int ic, ib, x, y, ox, sl;
2948 Glyph base, new;
2949 char buf[DRAW_BUF_SIZ];
2950 bool ena_sel = sel.bx != -1;
2951
2952 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
2953 ena_sel = 0;
2954
2955 if(!(xw.state & WIN_VISIBLE))
2956 return;
2957
2958 for(y = y1; y < y2; y++) {
2959 if(!term.dirty[y])
2960 continue;
2961
2962 xtermclear(0, y, term.col, y);
2963 term.dirty[y] = 0;
2964 base = term.line[y][0];
2965 ic = ib = ox = 0;
2966 for(x = x1; x < x2; x++) {
2967 new = term.line[y][x];
2968 if(ena_sel && *(new.c) && selected(x, y))
2969 new.mode ^= ATTR_REVERSE;
2970 if(ib > 0 && (!(new.state & GLYPH_SET)
2971 || ATTRCMP(base, new)
2972 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2973 xdraws(buf, base, ox, y, ic, ib);
2974 ic = ib = 0;
2975 }
2976 if(new.state & GLYPH_SET) {
2977 if(ib == 0) {
2978 ox = x;
2979 base = new;
2980 }
2981
2982 sl = utf8size(new.c);
2983 memcpy(buf+ib, new.c, sl);
2984 ib += sl;
2985 ++ic;
2986 }
2987 }
2988 if(ib > 0)
2989 xdraws(buf, base, ox, y, ic, ib);
2990 }
2991 xdrawcursor();
2992 }
2993
2994 void
2995 expose(XEvent *ev) {
2996 XExposeEvent *e = &ev->xexpose;
2997
2998 if(xw.state & WIN_REDRAW) {
2999 if(!e->count)
3000 xw.state &= ~WIN_REDRAW;
3001 }
3002 redraw(0);
3003 }
3004
3005 void
3006 visibility(XEvent *ev) {
3007 XVisibilityEvent *e = &ev->xvisibility;
3008
3009 if(e->state == VisibilityFullyObscured) {
3010 xw.state &= ~WIN_VISIBLE;
3011 } else if(!(xw.state & WIN_VISIBLE)) {
3012 /* need a full redraw for next Expose, not just a buf copy */
3013 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3014 }
3015 }
3016
3017 void
3018 unmap(XEvent *ev) {
3019 xw.state &= ~WIN_VISIBLE;
3020 }
3021
3022 void
3023 xseturgency(int add) {
3024 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3025
3026 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3027 XSetWMHints(xw.dpy, xw.win, h);
3028 XFree(h);
3029 }
3030
3031 void
3032 focus(XEvent *ev) {
3033 XFocusChangeEvent *e = &ev->xfocus;
3034
3035 if(e->mode == NotifyGrab)
3036 return;
3037
3038 if(ev->type == FocusIn) {
3039 XSetICFocus(xw.xic);
3040 xw.state |= WIN_FOCUSED;
3041 xseturgency(0);
3042 } else {
3043 XUnsetICFocus(xw.xic);
3044 xw.state &= ~WIN_FOCUSED;
3045 }
3046 }
3047
3048 inline bool
3049 match(uint mask, uint state) {
3050 state &= ~(ignoremod);
3051
3052 if(mask == XK_NO_MOD && state)
3053 return false;
3054 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3055 return false;
3056 if((state & mask) != state)
3057 return false;
3058 return true;
3059 }
3060
3061 void
3062 numlock(const Arg *dummy) {
3063 term.numlock ^= 1;
3064 }
3065
3066 char*
3067 kmap(KeySym k, uint state) {
3068 uint mask;
3069 Key *kp;
3070 int i;
3071
3072 /* Check for mapped keys out of X11 function keys. */
3073 for(i = 0; i < LEN(mappedkeys); i++) {
3074 if(mappedkeys[i] == k)
3075 break;
3076 }
3077 if(i == LEN(mappedkeys)) {
3078 if((k & 0xFFFF) < 0xFD00)
3079 return NULL;
3080 }
3081
3082 for(kp = key; kp < key + LEN(key); kp++) {
3083 mask = kp->mask;
3084
3085 if(kp->k != k)
3086 continue;
3087
3088 if(!match(mask, state))
3089 continue;
3090
3091 if(kp->appkey > 0) {
3092 if(!IS_SET(MODE_APPKEYPAD))
3093 continue;
3094 if(term.numlock && kp->appkey == 2)
3095 continue;
3096 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3097 continue;
3098 }
3099
3100 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3101 (kp->appcursor > 0
3102 && !IS_SET(MODE_APPCURSOR))) {
3103 continue;
3104 }
3105
3106 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3107 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3108 continue;
3109 }
3110
3111 return kp->s;
3112 }
3113
3114 return NULL;
3115 }
3116
3117 void
3118 kpress(XEvent *ev) {
3119 XKeyEvent *e = &ev->xkey;
3120 KeySym ksym;
3121 char xstr[31], buf[32], *customkey, *cp = buf;
3122 int len;
3123 Status status;
3124 Shortcut *bp;
3125
3126 if(IS_SET(MODE_KBDLOCK))
3127 return;
3128
3129 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3130 e->state &= ~Mod2Mask;
3131 /* 1. shortcuts */
3132 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3133 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3134 bp->func(&(bp->arg));
3135 return;
3136 }
3137 }
3138
3139 /* 2. custom keys from config.h */
3140 if((customkey = kmap(ksym, e->state))) {
3141 len = strlen(customkey);
3142 memcpy(buf, customkey, len);
3143 /* 2. hardcoded (overrides X lookup) */
3144 } else {
3145 if(len == 0)
3146 return;
3147
3148 if(len == 1 && e->state & Mod1Mask)
3149 *cp++ = '\033';
3150
3151 memcpy(cp, xstr, len);
3152 len = cp - buf + len;
3153 }
3154
3155 ttywrite(buf, len);
3156 if(IS_SET(MODE_ECHO))
3157 techo(buf, len);
3158 }
3159
3160
3161 void
3162 cmessage(XEvent *e) {
3163 /*
3164 * See xembed specs
3165 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3166 */
3167 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3168 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3169 xw.state |= WIN_FOCUSED;
3170 xseturgency(0);
3171 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3172 xw.state &= ~WIN_FOCUSED;
3173 }
3174 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3175 /* Send SIGHUP to shell */
3176 kill(pid, SIGHUP);
3177 exit(EXIT_SUCCESS);
3178 }
3179 }
3180
3181 void
3182 cresize(int width, int height) {
3183 int col, row;
3184
3185 if(width != 0)
3186 xw.w = width;
3187 if(height != 0)
3188 xw.h = height;
3189
3190 col = (xw.w - 2 * borderpx) / xw.cw;
3191 row = (xw.h - 2 * borderpx) / xw.ch;
3192
3193 tresize(col, row);
3194 xresize(col, row);
3195 ttyresize();
3196 }
3197
3198 void
3199 resize(XEvent *e) {
3200 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3201 return;
3202
3203 cresize(e->xconfigure.width, e->xconfigure.height);
3204 }
3205
3206 void
3207 run(void) {
3208 XEvent ev;
3209 fd_set rfd;
3210 int xfd = XConnectionNumber(xw.dpy), xev;
3211 struct timeval drawtimeout, *tv = NULL, now, last;
3212
3213 gettimeofday(&last, NULL);
3214
3215 for(xev = actionfps;;) {
3216 FD_ZERO(&rfd);
3217 FD_SET(cmdfd, &rfd);
3218 FD_SET(xfd, &rfd);
3219 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3220 if(errno == EINTR)
3221 continue;
3222 die("select failed: %s\n", SERRNO);
3223 }
3224
3225 gettimeofday(&now, NULL);
3226 drawtimeout.tv_sec = 0;
3227 drawtimeout.tv_usec = (1000/xfps) * 1000;
3228 tv = &drawtimeout;
3229
3230 if(FD_ISSET(cmdfd, &rfd))
3231 ttyread();
3232
3233 if(FD_ISSET(xfd, &rfd))
3234 xev = actionfps;
3235
3236 if(TIMEDIFF(now, last) > \
3237 (xev ? (1000/xfps) : (1000/actionfps))) {
3238 while(XPending(xw.dpy)) {
3239 XNextEvent(xw.dpy, &ev);
3240 if(XFilterEvent(&ev, None))
3241 continue;
3242 if(handler[ev.type])
3243 (handler[ev.type])(&ev);
3244 }
3245
3246 draw();
3247 XFlush(xw.dpy);
3248 last = now;
3249
3250 if(xev && !FD_ISSET(xfd, &rfd))
3251 xev--;
3252 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd))
3253 tv = NULL;
3254 }
3255 }
3256 }
3257
3258 int
3259 main(int argc, char *argv[]) {
3260 int i, bitm, xr, yr;
3261 uint wr, hr;
3262
3263 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3264 xw.isfixed = False;
3265
3266 for(i = 1; i < argc; i++) {
3267 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
3268 case 'c':
3269 if(++i < argc)
3270 opt_class = argv[i];
3271 break;
3272 case 'e':
3273 /* eat all remaining arguments */
3274 if(++i < argc)
3275 opt_cmd = &argv[i];
3276 goto run;
3277 case 'f':
3278 if(++i < argc)
3279 opt_font = argv[i];
3280 break;
3281 case 'g':
3282 if(++i >= argc)
3283 break;
3284
3285 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
3286 if(bitm & XValue)
3287 xw.fx = xr;
3288 if(bitm & YValue)
3289 xw.fy = yr;
3290 if(bitm & WidthValue)
3291 xw.fw = (int)wr;
3292 if(bitm & HeightValue)
3293 xw.fh = (int)hr;
3294 if(bitm & XNegative && xw.fx == 0)
3295 xw.fx = -1;
3296 if(bitm & XNegative && xw.fy == 0)
3297 xw.fy = -1;
3298
3299 if(xw.fh != 0 && xw.fw != 0)
3300 xw.isfixed = True;
3301 break;
3302 case 'o':
3303 if(++i < argc)
3304 opt_io = argv[i];
3305 break;
3306 case 't':
3307 if(++i < argc)
3308 opt_title = argv[i];
3309 break;
3310 case 'v':
3311 default:
3312 die(USAGE);
3313 case 'w':
3314 if(++i < argc)
3315 opt_embed = argv[i];
3316 break;
3317 }
3318 }
3319
3320 run:
3321 setlocale(LC_CTYPE, "");
3322 XSetLocaleModifiers("");
3323 tnew(80, 24);
3324 xinit();
3325 ttynew();
3326 selinit();
3327 run();
3328
3329 return 0;
3330 }
3331