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Pange seems to use ascent + descent instead of height.
[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <sys/ioctl.h>
15 #include <sys/select.h>
16 #include <sys/stat.h>
17 #include <sys/time.h>
18 #include <sys/types.h>
19 #include <sys/wait.h>
20 #include <time.h>
21 #include <unistd.h>
22 #include <X11/Xatom.h>
23 #include <X11/Xlib.h>
24 #include <X11/Xutil.h>
25 #include <X11/cursorfont.h>
26 #include <X11/keysym.h>
27 #include <X11/Xft/Xft.h>
28 #include <fontconfig/fontconfig.h>
29
30 #define Glyph Glyph_
31 #define Font Font_
32 #define Draw XftDraw *
33 #define Colour XftColor
34 #define Colourmap Colormap
35
36 #if defined(__linux)
37 #include <pty.h>
38 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
39 #include <util.h>
40 #elif defined(__FreeBSD__) || defined(__DragonFly__)
41 #include <libutil.h>
42 #endif
43
44 #define USAGE \
45 "st " VERSION " (c) 2010-2013 st engineers\n" \
46 "usage: st [-v] [-c class] [-f font] [-g geometry] [-o file]" \
47 " [-t title] [-w windowid] [-e command ...]\n"
48
49 /* XEMBED messages */
50 #define XEMBED_FOCUS_IN 4
51 #define XEMBED_FOCUS_OUT 5
52
53 /* Arbitrary sizes */
54 #define UTF_SIZ 4
55 #define ESC_BUF_SIZ (128*UTF_SIZ)
56 #define ESC_ARG_SIZ 16
57 #define STR_BUF_SIZ ESC_BUF_SIZ
58 #define STR_ARG_SIZ ESC_ARG_SIZ
59 #define DRAW_BUF_SIZ 20*1024
60 #define XK_ANY_MOD UINT_MAX
61 #define XK_NO_MOD 0
62 #define XK_SWITCH_MOD (1<<13)
63
64 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
65
66 /* macros */
67 #define SERRNO strerror(errno)
68 #define MIN(a, b) ((a) < (b) ? (a) : (b))
69 #define MAX(a, b) ((a) < (b) ? (b) : (a))
70 #define LEN(a) (sizeof(a) / sizeof(a[0]))
71 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
72 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
73 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
74 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
75 #define IS_SET(flag) ((term.mode & (flag)) != 0)
76 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
77
78 #define VT102ID "\033[?6c"
79
80 enum glyph_attribute {
81 ATTR_NULL = 0,
82 ATTR_REVERSE = 1,
83 ATTR_UNDERLINE = 2,
84 ATTR_BOLD = 4,
85 ATTR_GFX = 8,
86 ATTR_ITALIC = 16,
87 ATTR_BLINK = 32,
88 };
89
90 enum cursor_movement {
91 CURSOR_SAVE,
92 CURSOR_LOAD
93 };
94
95 enum cursor_state {
96 CURSOR_DEFAULT = 0,
97 CURSOR_WRAPNEXT = 1,
98 CURSOR_ORIGIN = 2
99 };
100
101 enum glyph_state {
102 GLYPH_SET = 1,
103 GLYPH_DIRTY = 2
104 };
105
106 enum term_mode {
107 MODE_WRAP = 1,
108 MODE_INSERT = 2,
109 MODE_APPKEYPAD = 4,
110 MODE_ALTSCREEN = 8,
111 MODE_CRLF = 16,
112 MODE_MOUSEBTN = 32,
113 MODE_MOUSEMOTION = 64,
114 MODE_MOUSE = 32|64,
115 MODE_REVERSE = 128,
116 MODE_KBDLOCK = 256,
117 MODE_HIDE = 512,
118 MODE_ECHO = 1024,
119 MODE_APPCURSOR = 2048,
120 MODE_MOUSESGR = 4096,
121 };
122
123 enum escape_state {
124 ESC_START = 1,
125 ESC_CSI = 2,
126 ESC_STR = 4, /* DSC, OSC, PM, APC */
127 ESC_ALTCHARSET = 8,
128 ESC_STR_END = 16, /* a final string was encountered */
129 ESC_TEST = 32, /* Enter in test mode */
130 };
131
132 enum window_state {
133 WIN_VISIBLE = 1,
134 WIN_REDRAW = 2,
135 WIN_FOCUSED = 4
136 };
137
138 enum selection_type {
139 SEL_REGULAR = 1,
140 SEL_RECTANGULAR = 2
141 };
142
143 /* bit macro */
144 #undef B0
145 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
146
147 typedef unsigned char uchar;
148 typedef unsigned int uint;
149 typedef unsigned long ulong;
150 typedef unsigned short ushort;
151
152 typedef struct {
153 char c[UTF_SIZ]; /* character code */
154 uchar mode; /* attribute flags */
155 ushort fg; /* foreground */
156 ushort bg; /* background */
157 uchar state; /* state flags */
158 } Glyph;
159
160 typedef Glyph *Line;
161
162 typedef struct {
163 Glyph attr; /* current char attributes */
164 int x;
165 int y;
166 char state;
167 } TCursor;
168
169 /* CSI Escape sequence structs */
170 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
171 typedef struct {
172 char buf[ESC_BUF_SIZ]; /* raw string */
173 int len; /* raw string length */
174 char priv;
175 int arg[ESC_ARG_SIZ];
176 int narg; /* nb of args */
177 char mode;
178 } CSIEscape;
179
180 /* STR Escape sequence structs */
181 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
182 typedef struct {
183 char type; /* ESC type ... */
184 char buf[STR_BUF_SIZ]; /* raw string */
185 int len; /* raw string length */
186 char *args[STR_ARG_SIZ];
187 int narg; /* nb of args */
188 } STREscape;
189
190 /* Internal representation of the screen */
191 typedef struct {
192 int row; /* nb row */
193 int col; /* nb col */
194 Line *line; /* screen */
195 Line *alt; /* alternate screen */
196 bool *dirty; /* dirtyness of lines */
197 TCursor c; /* cursor */
198 int top; /* top scroll limit */
199 int bot; /* bottom scroll limit */
200 int mode; /* terminal mode flags */
201 int esc; /* escape state flags */
202 bool numlock; /* lock numbers in keyboard */
203 bool *tabs;
204 } Term;
205
206 /* Purely graphic info */
207 typedef struct {
208 Display *dpy;
209 Colourmap cmap;
210 Window win;
211 Drawable buf;
212 Atom xembed, wmdeletewin;
213 XIM xim;
214 XIC xic;
215 Draw draw;
216 Visual *vis;
217 int scr;
218 bool isfixed; /* is fixed geometry? */
219 int fx, fy, fw, fh; /* fixed geometry */
220 int tw, th; /* tty width and height */
221 int w, h; /* window width and height */
222 int ch; /* char height */
223 int cw; /* char width */
224 char state; /* focus, redraw, visible */
225 } XWindow;
226
227 typedef struct {
228 KeySym k;
229 uint mask;
230 char s[ESC_BUF_SIZ];
231 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
232 signed char appkey; /* application keypad */
233 signed char appcursor; /* application cursor */
234 signed char crlf; /* crlf mode */
235 } Key;
236
237 /* TODO: use better name for vars... */
238 typedef struct {
239 int mode;
240 int type;
241 int bx, by;
242 int ex, ey;
243 struct {
244 int x, y;
245 } b, e;
246 char *clip;
247 Atom xtarget;
248 bool alt;
249 struct timeval tclick1;
250 struct timeval tclick2;
251 } Selection;
252
253 typedef union {
254 int i;
255 unsigned int ui;
256 float f;
257 const void *v;
258 } Arg;
259
260 typedef struct {
261 unsigned int mod;
262 KeySym keysym;
263 void (*func)(const Arg *);
264 const Arg arg;
265 } Shortcut;
266
267 /* function definitions used in config.h */
268 static void clippaste(const Arg *);
269 static void numlock(const Arg *);
270 static void selpaste(const Arg *);
271 static void xzoom(const Arg *);
272
273 /* Config.h for applying patches and the configuration. */
274 #include "config.h"
275
276 /* Font structure */
277 typedef struct {
278 int height;
279 int width;
280 int ascent;
281 int descent;
282 short lbearing;
283 short rbearing;
284 XftFont *match;
285 FcFontSet *set;
286 FcPattern *pattern;
287 } Font;
288
289 /* Drawing Context */
290 typedef struct {
291 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
292 Font font, bfont, ifont, ibfont;
293 GC gc;
294 } DC;
295
296 static void die(const char *, ...);
297 static void draw(void);
298 static void redraw(int);
299 static void drawregion(int, int, int, int);
300 static void execsh(void);
301 static void sigchld(int);
302 static void run(void);
303
304 static void csidump(void);
305 static void csihandle(void);
306 static void csiparse(void);
307 static void csireset(void);
308 static void strdump(void);
309 static void strhandle(void);
310 static void strparse(void);
311 static void strreset(void);
312
313 static void tclearregion(int, int, int, int, int);
314 static void tcursor(int);
315 static void tdeletechar(int);
316 static void tdeleteline(int);
317 static void tinsertblank(int);
318 static void tinsertblankline(int);
319 static void tmoveto(int, int);
320 static void tmoveato(int x, int y);
321 static void tnew(int, int);
322 static void tnewline(int);
323 static void tputtab(bool);
324 static void tputc(char *, int);
325 static void treset(void);
326 static int tresize(int, int);
327 static void tscrollup(int, int);
328 static void tscrolldown(int, int);
329 static void tsetattr(int*, int);
330 static void tsetchar(char *, Glyph *, int, int);
331 static void tsetscroll(int, int);
332 static void tswapscreen(void);
333 static void tsetdirt(int, int);
334 static void tsetmode(bool, bool, int *, int);
335 static void tfulldirt(void);
336 static void techo(char *, int);
337
338 static inline bool match(uint, uint);
339 static void ttynew(void);
340 static void ttyread(void);
341 static void ttyresize(void);
342 static void ttywrite(const char *, size_t);
343
344 static void xdraws(char *, Glyph, int, int, int, int);
345 static void xhints(void);
346 static void xclear(int, int, int, int);
347 static void xdrawcursor(void);
348 static void xinit(void);
349 static void xloadcols(void);
350 static int xsetcolorname(int, const char *);
351 static int xloadfont(Font *, FcPattern *);
352 static void xloadfonts(char *, int);
353 static void xsettitle(char *);
354 static void xresettitle(void);
355 static void xseturgency(int);
356 static void xsetsel(char*);
357 static void xtermclear(int, int, int, int);
358 static void xunloadfonts(void);
359 static void xresize(int, int);
360
361 static void expose(XEvent *);
362 static void visibility(XEvent *);
363 static void unmap(XEvent *);
364 static char *kmap(KeySym, uint);
365 static void kpress(XEvent *);
366 static void cmessage(XEvent *);
367 static void cresize(int, int);
368 static void resize(XEvent *);
369 static void focus(XEvent *);
370 static void brelease(XEvent *);
371 static void bpress(XEvent *);
372 static void bmotion(XEvent *);
373 static void selnotify(XEvent *);
374 static void selclear(XEvent *);
375 static void selrequest(XEvent *);
376
377 static void selinit(void);
378 static inline bool selected(int, int);
379 static void selcopy(void);
380 static void selscroll(int, int);
381
382 static int utf8decode(char *, long *);
383 static int utf8encode(long *, char *);
384 static int utf8size(char *);
385 static int isfullutf8(char *, int);
386
387 static ssize_t xwrite(int, char *, size_t);
388 static void *xmalloc(size_t);
389 static void *xrealloc(void *, size_t);
390 static void *xcalloc(size_t, size_t);
391
392 static void (*handler[LASTEvent])(XEvent *) = {
393 [KeyPress] = kpress,
394 [ClientMessage] = cmessage,
395 [ConfigureNotify] = resize,
396 [VisibilityNotify] = visibility,
397 [UnmapNotify] = unmap,
398 [Expose] = expose,
399 [FocusIn] = focus,
400 [FocusOut] = focus,
401 [MotionNotify] = bmotion,
402 [ButtonPress] = bpress,
403 [ButtonRelease] = brelease,
404 [SelectionClear] = selclear,
405 [SelectionNotify] = selnotify,
406 [SelectionRequest] = selrequest,
407 };
408
409 /* Globals */
410 static DC dc;
411 static XWindow xw;
412 static Term term;
413 static CSIEscape csiescseq;
414 static STREscape strescseq;
415 static int cmdfd;
416 static pid_t pid;
417 static Selection sel;
418 static int iofd = -1;
419 static char **opt_cmd = NULL;
420 static char *opt_io = NULL;
421 static char *opt_title = NULL;
422 static char *opt_embed = NULL;
423 static char *opt_class = NULL;
424 static char *opt_font = NULL;
425
426 static char *usedfont = NULL;
427 static int usedfontsize = 0;
428
429 /* Font Ring Cache */
430 enum {
431 FRC_NORMAL,
432 FRC_ITALIC,
433 FRC_BOLD,
434 FRC_ITALICBOLD
435 };
436
437 typedef struct {
438 XftFont *font;
439 long c;
440 int flags;
441 } Fontcache;
442
443 /*
444 * Fontcache is a ring buffer, with frccur as current position and frclen as
445 * the current length of used elements.
446 */
447
448 static Fontcache frc[1024];
449 static int frccur = -1, frclen = 0;
450
451 ssize_t
452 xwrite(int fd, char *s, size_t len) {
453 size_t aux = len;
454
455 while(len > 0) {
456 ssize_t r = write(fd, s, len);
457 if(r < 0)
458 return r;
459 len -= r;
460 s += r;
461 }
462 return aux;
463 }
464
465 void *
466 xmalloc(size_t len) {
467 void *p = malloc(len);
468
469 if(!p)
470 die("Out of memory\n");
471
472 return p;
473 }
474
475 void *
476 xrealloc(void *p, size_t len) {
477 if((p = realloc(p, len)) == NULL)
478 die("Out of memory\n");
479
480 return p;
481 }
482
483 void *
484 xcalloc(size_t nmemb, size_t size) {
485 void *p = calloc(nmemb, size);
486
487 if(!p)
488 die("Out of memory\n");
489
490 return p;
491 }
492
493 int
494 utf8decode(char *s, long *u) {
495 uchar c;
496 int i, n, rtn;
497
498 rtn = 1;
499 c = *s;
500 if(~c & B7) { /* 0xxxxxxx */
501 *u = c;
502 return rtn;
503 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
504 *u = c&(B4|B3|B2|B1|B0);
505 n = 1;
506 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
507 *u = c&(B3|B2|B1|B0);
508 n = 2;
509 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
510 *u = c & (B2|B1|B0);
511 n = 3;
512 } else {
513 goto invalid;
514 }
515
516 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
517 c = *s;
518 if((c & (B7|B6)) != B7) /* 10xxxxxx */
519 goto invalid;
520 *u <<= 6;
521 *u |= c & (B5|B4|B3|B2|B1|B0);
522 }
523
524 if((n == 1 && *u < 0x80) ||
525 (n == 2 && *u < 0x800) ||
526 (n == 3 && *u < 0x10000) ||
527 (*u >= 0xD800 && *u <= 0xDFFF)) {
528 goto invalid;
529 }
530
531 return rtn;
532 invalid:
533 *u = 0xFFFD;
534
535 return rtn;
536 }
537
538 int
539 utf8encode(long *u, char *s) {
540 uchar *sp;
541 ulong uc;
542 int i, n;
543
544 sp = (uchar *)s;
545 uc = *u;
546 if(uc < 0x80) {
547 *sp = uc; /* 0xxxxxxx */
548 return 1;
549 } else if(*u < 0x800) {
550 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
551 n = 1;
552 } else if(uc < 0x10000) {
553 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
554 n = 2;
555 } else if(uc <= 0x10FFFF) {
556 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
557 n = 3;
558 } else {
559 goto invalid;
560 }
561
562 for(i=n,++sp; i>0; --i,++sp)
563 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
564
565 return n+1;
566 invalid:
567 /* U+FFFD */
568 *s++ = '\xEF';
569 *s++ = '\xBF';
570 *s = '\xBD';
571
572 return 3;
573 }
574
575 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
576 UTF-8 otherwise return 0 */
577 int
578 isfullutf8(char *s, int b) {
579 uchar *c1, *c2, *c3;
580
581 c1 = (uchar *)s;
582 c2 = (uchar *)++s;
583 c3 = (uchar *)++s;
584 if(b < 1) {
585 return 0;
586 } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
587 return 0;
588 } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
589 ((b == 1) ||
590 ((b == 2) && (*c2&(B7|B6)) == B7))) {
591 return 0;
592 } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
593 ((b == 1) ||
594 ((b == 2) && (*c2&(B7|B6)) == B7) ||
595 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
596 return 0;
597 } else {
598 return 1;
599 }
600 }
601
602 int
603 utf8size(char *s) {
604 uchar c = *s;
605
606 if(~c&B7) {
607 return 1;
608 } else if((c&(B7|B6|B5)) == (B7|B6)) {
609 return 2;
610 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
611 return 3;
612 } else {
613 return 4;
614 }
615 }
616
617 void
618 selinit(void) {
619 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
620 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
621 sel.mode = 0;
622 sel.bx = -1;
623 sel.clip = NULL;
624 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
625 if(sel.xtarget == None)
626 sel.xtarget = XA_STRING;
627 }
628
629 static int
630 x2col(int x) {
631 x -= borderpx;
632 x /= xw.cw;
633
634 return LIMIT(x, 0, term.col-1);
635 }
636
637 static int
638 y2row(int y) {
639 y -= borderpx;
640 y /= xw.ch;
641
642 return LIMIT(y, 0, term.row-1);
643 }
644
645 static inline bool
646 selected(int x, int y) {
647 int bx, ex;
648
649 if(sel.ey == y && sel.by == y) {
650 bx = MIN(sel.bx, sel.ex);
651 ex = MAX(sel.bx, sel.ex);
652 return BETWEEN(x, bx, ex);
653 }
654
655 return ((sel.b.y < y && y < sel.e.y)
656 || (y == sel.e.y && x <= sel.e.x))
657 || (y == sel.b.y && x >= sel.b.x
658 && (x <= sel.e.x || sel.b.y != sel.e.y));
659 switch(sel.type) {
660 case SEL_REGULAR:
661 return ((sel.b.y < y && y < sel.e.y)
662 || (y == sel.e.y && x <= sel.e.x))
663 || (y == sel.b.y && x >= sel.b.x
664 && (x <= sel.e.x || sel.b.y != sel.e.y));
665 case SEL_RECTANGULAR:
666 return ((sel.b.y <= y && y <= sel.e.y)
667 && (sel.b.x <= x && x <= sel.e.x));
668 };
669 }
670
671 void
672 getbuttoninfo(XEvent *e) {
673 int type;
674 uint state = e->xbutton.state &~Button1Mask;
675
676 sel.alt = IS_SET(MODE_ALTSCREEN);
677
678 sel.ex = x2col(e->xbutton.x);
679 sel.ey = y2row(e->xbutton.y);
680
681 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
682 sel.b.y = MIN(sel.by, sel.ey);
683 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
684 sel.e.y = MAX(sel.by, sel.ey);
685
686 sel.type = SEL_REGULAR;
687 for(type = 1; type < LEN(selmasks); ++type) {
688 if(match(selmasks[type], state)) {
689 sel.type = type;
690 break;
691 }
692 }
693 }
694
695 void
696 mousereport(XEvent *e) {
697 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
698 button = e->xbutton.button, state = e->xbutton.state,
699 len;
700 char buf[40];
701 static int ob, ox, oy;
702
703 /* from urxvt */
704 if(e->xbutton.type == MotionNotify) {
705 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
706 return;
707 button = ob + 32;
708 ox = x, oy = y;
709 } else if(!IS_SET(MODE_MOUSESGR)
710 && (e->xbutton.type == ButtonRelease
711 || button == AnyButton)) {
712 button = 3;
713 } else {
714 button -= Button1;
715 if(button >= 3)
716 button += 64 - 3;
717 if(e->xbutton.type == ButtonPress) {
718 ob = button;
719 ox = x, oy = y;
720 }
721 }
722
723 button += (state & ShiftMask ? 4 : 0)
724 + (state & Mod4Mask ? 8 : 0)
725 + (state & ControlMask ? 16 : 0);
726
727 len = 0;
728 if(IS_SET(MODE_MOUSESGR)) {
729 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
730 button, x+1, y+1,
731 e->xbutton.type == ButtonRelease ? 'm' : 'M');
732 } else if(x < 223 && y < 223) {
733 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
734 32+button, 32+x+1, 32+y+1);
735 } else {
736 return;
737 }
738
739 ttywrite(buf, len);
740 }
741
742 void
743 bpress(XEvent *e) {
744 if(IS_SET(MODE_MOUSE)) {
745 mousereport(e);
746 } else if(e->xbutton.button == Button1) {
747 if(sel.bx != -1) {
748 sel.bx = -1;
749 tsetdirt(sel.b.y, sel.e.y);
750 draw();
751 }
752 sel.mode = 1;
753 sel.type = SEL_REGULAR;
754 sel.ex = sel.bx = x2col(e->xbutton.x);
755 sel.ey = sel.by = y2row(e->xbutton.y);
756 } else if(e->xbutton.button == Button4) {
757 ttywrite("\031", 1);
758 } else if(e->xbutton.button == Button5) {
759 ttywrite("\005", 1);
760 }
761 }
762
763 void
764 selcopy(void) {
765 char *str, *ptr, *p;
766 int x, y, bufsize, is_selected = 0, size;
767 Glyph *gp, *last;
768
769 if(sel.bx == -1) {
770 str = NULL;
771 } else {
772 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
773 ptr = str = xmalloc(bufsize);
774
775 /* append every set & selected glyph to the selection */
776 for(y = sel.b.y; y < sel.e.y + 1; y++) {
777 is_selected = 0;
778 gp = &term.line[y][0];
779 last = gp + term.col;
780
781 while(--last >= gp && !(last->state & GLYPH_SET))
782 /* nothing */;
783
784 for(x = 0; gp <= last; x++, ++gp) {
785 if(!selected(x, y)) {
786 continue;
787 } else {
788 is_selected = 1;
789 }
790
791 p = (gp->state & GLYPH_SET) ? gp->c : " ";
792 size = utf8size(p);
793 memcpy(ptr, p, size);
794 ptr += size;
795 }
796 /* \n at the end of every selected line except for the last one */
797 if(is_selected && y < sel.e.y)
798 *ptr++ = '\r';
799 }
800 *ptr = 0;
801 }
802 xsetsel(str);
803 }
804
805 void
806 selnotify(XEvent *e) {
807 ulong nitems, ofs, rem;
808 int format;
809 uchar *data;
810 Atom type;
811
812 ofs = 0;
813 do {
814 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
815 False, AnyPropertyType, &type, &format,
816 &nitems, &rem, &data)) {
817 fprintf(stderr, "Clipboard allocation failed\n");
818 return;
819 }
820 ttywrite((const char *) data, nitems * format / 8);
821 XFree(data);
822 /* number of 32-bit chunks returned */
823 ofs += nitems * format / 32;
824 } while(rem > 0);
825 }
826
827 void
828 selpaste(const Arg *dummy) {
829 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
830 xw.win, CurrentTime);
831 }
832
833 void
834 clippaste(const Arg *dummy) {
835 Atom clipboard;
836
837 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
838 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
839 xw.win, CurrentTime);
840 }
841
842 void
843 selclear(XEvent *e) {
844 if(sel.bx == -1)
845 return;
846 sel.bx = -1;
847 tsetdirt(sel.b.y, sel.e.y);
848 }
849
850 void
851 selrequest(XEvent *e) {
852 XSelectionRequestEvent *xsre;
853 XSelectionEvent xev;
854 Atom xa_targets, string;
855
856 xsre = (XSelectionRequestEvent *) e;
857 xev.type = SelectionNotify;
858 xev.requestor = xsre->requestor;
859 xev.selection = xsre->selection;
860 xev.target = xsre->target;
861 xev.time = xsre->time;
862 /* reject */
863 xev.property = None;
864
865 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
866 if(xsre->target == xa_targets) {
867 /* respond with the supported type */
868 string = sel.xtarget;
869 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
870 XA_ATOM, 32, PropModeReplace,
871 (uchar *) &string, 1);
872 xev.property = xsre->property;
873 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
874 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
875 xsre->target, 8, PropModeReplace,
876 (uchar *) sel.clip, strlen(sel.clip));
877 xev.property = xsre->property;
878 }
879
880 /* all done, send a notification to the listener */
881 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
882 fprintf(stderr, "Error sending SelectionNotify event\n");
883 }
884
885 void
886 xsetsel(char *str) {
887 /* register the selection for both the clipboard and the primary */
888 Atom clipboard;
889
890 free(sel.clip);
891 sel.clip = str;
892
893 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
894
895 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
896 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
897 }
898
899 void
900 brelease(XEvent *e) {
901 struct timeval now;
902
903 if(IS_SET(MODE_MOUSE)) {
904 mousereport(e);
905 return;
906 }
907
908 if(e->xbutton.button == Button2) {
909 selpaste(NULL);
910 } else if(e->xbutton.button == Button1) {
911 sel.mode = 0;
912 getbuttoninfo(e);
913 term.dirty[sel.ey] = 1;
914 if(sel.bx == sel.ex && sel.by == sel.ey) {
915 sel.bx = -1;
916 gettimeofday(&now, NULL);
917
918 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
919 /* triple click on the line */
920 sel.b.x = sel.bx = 0;
921 sel.e.x = sel.ex = term.col;
922 sel.b.y = sel.e.y = sel.ey;
923 selcopy();
924 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
925 /* double click to select word */
926 sel.bx = sel.ex;
927 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
928 term.line[sel.ey][sel.bx-1].c[0] != ' ') {
929 sel.bx--;
930 }
931 sel.b.x = sel.bx;
932 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
933 term.line[sel.ey][sel.ex+1].c[0] != ' ') {
934 sel.ex++;
935 }
936 sel.e.x = sel.ex;
937 sel.b.y = sel.e.y = sel.ey;
938 selcopy();
939 }
940 } else {
941 selcopy();
942 }
943 }
944
945 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
946 gettimeofday(&sel.tclick1, NULL);
947 }
948
949 void
950 bmotion(XEvent *e) {
951 int oldey, oldex, oldsby, oldsey;
952
953 if(IS_SET(MODE_MOUSE)) {
954 mousereport(e);
955 return;
956 }
957
958 if(!sel.mode)
959 return;
960
961 oldey = sel.ey;
962 oldex = sel.ex;
963 oldsby = sel.b.y;
964 oldsey = sel.e.y;
965 getbuttoninfo(e);
966
967 if(oldey != sel.ey || oldex != sel.ex) {
968 tsetdirt(MIN(sel.b.y, oldsby), MAX(sel.e.y, oldsey));
969 }
970 }
971
972 void
973 die(const char *errstr, ...) {
974 va_list ap;
975
976 va_start(ap, errstr);
977 vfprintf(stderr, errstr, ap);
978 va_end(ap);
979 exit(EXIT_FAILURE);
980 }
981
982 void
983 execsh(void) {
984 char **args;
985 char *envshell = getenv("SHELL");
986 const struct passwd *pass = getpwuid(getuid());
987 char buf[sizeof(long) * 8 + 1];
988
989 unsetenv("COLUMNS");
990 unsetenv("LINES");
991 unsetenv("TERMCAP");
992
993 if(pass) {
994 setenv("LOGNAME", pass->pw_name, 1);
995 setenv("USER", pass->pw_name, 1);
996 setenv("SHELL", pass->pw_shell, 0);
997 setenv("HOME", pass->pw_dir, 0);
998 }
999
1000 snprintf(buf, sizeof(buf), "%lu", xw.win);
1001 setenv("WINDOWID", buf, 1);
1002
1003 signal(SIGCHLD, SIG_DFL);
1004 signal(SIGHUP, SIG_DFL);
1005 signal(SIGINT, SIG_DFL);
1006 signal(SIGQUIT, SIG_DFL);
1007 signal(SIGTERM, SIG_DFL);
1008 signal(SIGALRM, SIG_DFL);
1009
1010 DEFAULT(envshell, shell);
1011 setenv("TERM", termname, 1);
1012 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1013 execvp(args[0], args);
1014 exit(EXIT_FAILURE);
1015 }
1016
1017 void
1018 sigchld(int a) {
1019 int stat = 0;
1020
1021 if(waitpid(pid, &stat, 0) < 0)
1022 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1023
1024 if(WIFEXITED(stat)) {
1025 exit(WEXITSTATUS(stat));
1026 } else {
1027 exit(EXIT_FAILURE);
1028 }
1029 }
1030
1031 void
1032 ttynew(void) {
1033 int m, s;
1034 struct winsize w = {term.row, term.col, 0, 0};
1035
1036 /* seems to work fine on linux, openbsd and freebsd */
1037 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1038 die("openpty failed: %s\n", SERRNO);
1039
1040 switch(pid = fork()) {
1041 case -1:
1042 die("fork failed\n");
1043 break;
1044 case 0:
1045 setsid(); /* create a new process group */
1046 dup2(s, STDIN_FILENO);
1047 dup2(s, STDOUT_FILENO);
1048 dup2(s, STDERR_FILENO);
1049 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1050 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1051 close(s);
1052 close(m);
1053 execsh();
1054 break;
1055 default:
1056 close(s);
1057 cmdfd = m;
1058 signal(SIGCHLD, sigchld);
1059 if(opt_io) {
1060 iofd = (!strcmp(opt_io, "-")) ?
1061 STDOUT_FILENO :
1062 open(opt_io, O_WRONLY | O_CREAT, 0666);
1063 if(iofd < 0) {
1064 fprintf(stderr, "Error opening %s:%s\n",
1065 opt_io, strerror(errno));
1066 }
1067 }
1068 }
1069 }
1070
1071 void
1072 dump(char c) {
1073 static int col;
1074
1075 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1076 if(++col % 10 == 0)
1077 fprintf(stderr, "\n");
1078 }
1079
1080 void
1081 ttyread(void) {
1082 static char buf[BUFSIZ];
1083 static int buflen = 0;
1084 char *ptr;
1085 char s[UTF_SIZ];
1086 int charsize; /* size of utf8 char in bytes */
1087 long utf8c;
1088 int ret;
1089
1090 /* append read bytes to unprocessed bytes */
1091 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1092 die("Couldn't read from shell: %s\n", SERRNO);
1093
1094 /* process every complete utf8 char */
1095 buflen += ret;
1096 ptr = buf;
1097 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1098 charsize = utf8decode(ptr, &utf8c);
1099 utf8encode(&utf8c, s);
1100 tputc(s, charsize);
1101 ptr += charsize;
1102 buflen -= charsize;
1103 }
1104
1105 /* keep any uncomplete utf8 char for the next call */
1106 memmove(buf, ptr, buflen);
1107 }
1108
1109 void
1110 ttywrite(const char *s, size_t n) {
1111 if(write(cmdfd, s, n) == -1)
1112 die("write error on tty: %s\n", SERRNO);
1113 }
1114
1115 void
1116 ttyresize(void) {
1117 struct winsize w;
1118
1119 w.ws_row = term.row;
1120 w.ws_col = term.col;
1121 w.ws_xpixel = xw.tw;
1122 w.ws_ypixel = xw.th;
1123 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1124 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1125 }
1126
1127 void
1128 tsetdirt(int top, int bot) {
1129 int i;
1130
1131 LIMIT(top, 0, term.row-1);
1132 LIMIT(bot, 0, term.row-1);
1133
1134 for(i = top; i <= bot; i++)
1135 term.dirty[i] = 1;
1136 }
1137
1138 void
1139 tfulldirt(void) {
1140 tsetdirt(0, term.row-1);
1141 }
1142
1143 void
1144 tcursor(int mode) {
1145 static TCursor c;
1146
1147 if(mode == CURSOR_SAVE) {
1148 c = term.c;
1149 } else if(mode == CURSOR_LOAD) {
1150 term.c = c;
1151 tmoveto(c.x, c.y);
1152 }
1153 }
1154
1155 void
1156 treset(void) {
1157 uint i;
1158
1159 term.c = (TCursor){{
1160 .mode = ATTR_NULL,
1161 .fg = defaultfg,
1162 .bg = defaultbg
1163 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1164
1165 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1166 for(i = tabspaces; i < term.col; i += tabspaces)
1167 term.tabs[i] = 1;
1168 term.top = 0;
1169 term.bot = term.row - 1;
1170 term.mode = MODE_WRAP;
1171
1172 tclearregion(0, 0, term.col-1, term.row-1, 0);
1173 tmoveto(0, 0);
1174 tcursor(CURSOR_SAVE);
1175 }
1176
1177 void
1178 tnew(int col, int row) {
1179 /* set screen size */
1180 term.row = row;
1181 term.col = col;
1182 term.line = xmalloc(term.row * sizeof(Line));
1183 term.alt = xmalloc(term.row * sizeof(Line));
1184 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
1185 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
1186
1187 for(row = 0; row < term.row; row++) {
1188 term.line[row] = xmalloc(term.col * sizeof(Glyph));
1189 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
1190 term.dirty[row] = 0;
1191 }
1192
1193 term.numlock = 1;
1194 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1195 /* setup screen */
1196 treset();
1197 }
1198
1199 void
1200 tswapscreen(void) {
1201 Line *tmp = term.line;
1202
1203 term.line = term.alt;
1204 term.alt = tmp;
1205 term.mode ^= MODE_ALTSCREEN;
1206 tfulldirt();
1207 }
1208
1209 void
1210 tscrolldown(int orig, int n) {
1211 int i;
1212 Line temp;
1213
1214 LIMIT(n, 0, term.bot-orig+1);
1215
1216 tclearregion(0, term.bot-n+1, term.col-1, term.bot, 0);
1217
1218 for(i = term.bot; i >= orig+n; i--) {
1219 temp = term.line[i];
1220 term.line[i] = term.line[i-n];
1221 term.line[i-n] = temp;
1222
1223 term.dirty[i] = 1;
1224 term.dirty[i-n] = 1;
1225 }
1226
1227 selscroll(orig, n);
1228 }
1229
1230 void
1231 tscrollup(int orig, int n) {
1232 int i;
1233 Line temp;
1234 LIMIT(n, 0, term.bot-orig+1);
1235
1236 tclearregion(0, orig, term.col-1, orig+n-1, 0);
1237
1238 for(i = orig; i <= term.bot-n; i++) {
1239 temp = term.line[i];
1240 term.line[i] = term.line[i+n];
1241 term.line[i+n] = temp;
1242
1243 term.dirty[i] = 1;
1244 term.dirty[i+n] = 1;
1245 }
1246
1247 selscroll(orig, -n);
1248 }
1249
1250 void
1251 selscroll(int orig, int n) {
1252 if(sel.bx == -1)
1253 return;
1254
1255 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1256 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1257 sel.bx = -1;
1258 return;
1259 }
1260 switch(sel.type) {
1261 case SEL_REGULAR:
1262 if(sel.by < term.top) {
1263 sel.by = term.top;
1264 sel.bx = 0;
1265 }
1266 if(sel.ey > term.bot) {
1267 sel.ey = term.bot;
1268 sel.ex = term.col;
1269 }
1270 break;
1271 case SEL_RECTANGULAR:
1272 if(sel.by < term.top)
1273 sel.by = term.top;
1274 if(sel.ey > term.bot)
1275 sel.ey = term.bot;
1276 break;
1277 };
1278 sel.b.y = sel.by, sel.b.x = sel.bx;
1279 sel.e.y = sel.ey, sel.e.x = sel.ex;
1280 }
1281 }
1282
1283 void
1284 tnewline(int first_col) {
1285 int y = term.c.y;
1286
1287 if(y == term.bot) {
1288 tscrollup(term.top, 1);
1289 } else {
1290 y++;
1291 }
1292 tmoveto(first_col ? 0 : term.c.x, y);
1293 }
1294
1295 void
1296 csiparse(void) {
1297 char *p = csiescseq.buf, *np;
1298 long int v;
1299
1300 csiescseq.narg = 0;
1301 if(*p == '?') {
1302 csiescseq.priv = 1;
1303 p++;
1304 }
1305
1306 csiescseq.buf[csiescseq.len] = '\0';
1307 while(p < csiescseq.buf+csiescseq.len) {
1308 np = NULL;
1309 v = strtol(p, &np, 10);
1310 if(np == p)
1311 v = 0;
1312 if(v == LONG_MAX || v == LONG_MIN)
1313 v = -1;
1314 csiescseq.arg[csiescseq.narg++] = v;
1315 p = np;
1316 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1317 break;
1318 p++;
1319 }
1320 csiescseq.mode = *p;
1321 }
1322
1323 /* for absolute user moves, when decom is set */
1324 void
1325 tmoveato(int x, int y) {
1326 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1327 }
1328
1329 void
1330 tmoveto(int x, int y) {
1331 int miny, maxy;
1332
1333 if(term.c.state & CURSOR_ORIGIN) {
1334 miny = term.top;
1335 maxy = term.bot;
1336 } else {
1337 miny = 0;
1338 maxy = term.row - 1;
1339 }
1340 LIMIT(x, 0, term.col-1);
1341 LIMIT(y, miny, maxy);
1342 term.c.state &= ~CURSOR_WRAPNEXT;
1343 term.c.x = x;
1344 term.c.y = y;
1345 }
1346
1347 void
1348 tsetchar(char *c, Glyph *attr, int x, int y) {
1349 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1350 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1351 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1352 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1353 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1354 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1355 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1356 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1357 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1358 };
1359
1360 /*
1361 * The table is proudly stolen from rxvt.
1362 */
1363 if(attr->mode & ATTR_GFX) {
1364 if(c[0] >= 0x41 && c[0] <= 0x7e
1365 && vt100_0[c[0] - 0x41]) {
1366 c = vt100_0[c[0] - 0x41];
1367 }
1368 }
1369
1370 term.dirty[y] = 1;
1371 term.line[y][x] = *attr;
1372 memcpy(term.line[y][x].c, c, UTF_SIZ);
1373 term.line[y][x].state |= GLYPH_SET;
1374 }
1375
1376 void
1377 tclearregion(int x1, int y1, int x2, int y2, int bce) {
1378 int x, y, temp;
1379
1380 if(x1 > x2)
1381 temp = x1, x1 = x2, x2 = temp;
1382 if(y1 > y2)
1383 temp = y1, y1 = y2, y2 = temp;
1384
1385 LIMIT(x1, 0, term.col-1);
1386 LIMIT(x2, 0, term.col-1);
1387 LIMIT(y1, 0, term.row-1);
1388 LIMIT(y2, 0, term.row-1);
1389
1390 for(y = y1; y <= y2; y++) {
1391 term.dirty[y] = 1;
1392 for(x = x1; x <= x2; x++) {
1393 if(bce) {
1394 term.line[y][x] = term.c.attr;
1395 memcpy(term.line[y][x].c, " ", 2);
1396 term.line[y][x].state |= GLYPH_SET;
1397 } else {
1398 term.line[y][x].state = 0;
1399 }
1400 }
1401 }
1402 }
1403
1404 void
1405 tdeletechar(int n) {
1406 int src = term.c.x + n;
1407 int dst = term.c.x;
1408 int size = term.col - src;
1409
1410 term.dirty[term.c.y] = 1;
1411
1412 if(src >= term.col) {
1413 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1414 return;
1415 }
1416
1417 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1418 size * sizeof(Glyph));
1419 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y, 0);
1420 }
1421
1422 void
1423 tinsertblank(int n) {
1424 int src = term.c.x;
1425 int dst = src + n;
1426 int size = term.col - dst;
1427
1428 term.dirty[term.c.y] = 1;
1429
1430 if(dst >= term.col) {
1431 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1432 return;
1433 }
1434
1435 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1436 size * sizeof(Glyph));
1437 tclearregion(src, term.c.y, dst - 1, term.c.y, 0);
1438 }
1439
1440 void
1441 tinsertblankline(int n) {
1442 if(term.c.y < term.top || term.c.y > term.bot)
1443 return;
1444
1445 tscrolldown(term.c.y, n);
1446 }
1447
1448 void
1449 tdeleteline(int n) {
1450 if(term.c.y < term.top || term.c.y > term.bot)
1451 return;
1452
1453 tscrollup(term.c.y, n);
1454 }
1455
1456 void
1457 tsetattr(int *attr, int l) {
1458 int i;
1459
1460 for(i = 0; i < l; i++) {
1461 switch(attr[i]) {
1462 case 0:
1463 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1464 | ATTR_ITALIC | ATTR_BLINK);
1465 term.c.attr.fg = defaultfg;
1466 term.c.attr.bg = defaultbg;
1467 break;
1468 case 1:
1469 term.c.attr.mode |= ATTR_BOLD;
1470 break;
1471 case 3:
1472 term.c.attr.mode |= ATTR_ITALIC;
1473 break;
1474 case 4:
1475 term.c.attr.mode |= ATTR_UNDERLINE;
1476 break;
1477 case 5: /* slow blink */
1478 case 6: /* rapid blink */
1479 term.c.attr.mode |= ATTR_BLINK;
1480 break;
1481 case 7:
1482 term.c.attr.mode |= ATTR_REVERSE;
1483 break;
1484 case 21:
1485 case 22:
1486 term.c.attr.mode &= ~ATTR_BOLD;
1487 break;
1488 case 23:
1489 term.c.attr.mode &= ~ATTR_ITALIC;
1490 break;
1491 case 24:
1492 term.c.attr.mode &= ~ATTR_UNDERLINE;
1493 break;
1494 case 25:
1495 case 26:
1496 term.c.attr.mode &= ~ATTR_BLINK;
1497 break;
1498 case 27:
1499 term.c.attr.mode &= ~ATTR_REVERSE;
1500 break;
1501 case 38:
1502 if(i + 2 < l && attr[i + 1] == 5) {
1503 i += 2;
1504 if(BETWEEN(attr[i], 0, 255)) {
1505 term.c.attr.fg = attr[i];
1506 } else {
1507 fprintf(stderr,
1508 "erresc: bad fgcolor %d\n",
1509 attr[i]);
1510 }
1511 } else {
1512 fprintf(stderr,
1513 "erresc(38): gfx attr %d unknown\n",
1514 attr[i]);
1515 }
1516 break;
1517 case 39:
1518 term.c.attr.fg = defaultfg;
1519 break;
1520 case 48:
1521 if(i + 2 < l && attr[i + 1] == 5) {
1522 i += 2;
1523 if(BETWEEN(attr[i], 0, 255)) {
1524 term.c.attr.bg = attr[i];
1525 } else {
1526 fprintf(stderr,
1527 "erresc: bad bgcolor %d\n",
1528 attr[i]);
1529 }
1530 } else {
1531 fprintf(stderr,
1532 "erresc(48): gfx attr %d unknown\n",
1533 attr[i]);
1534 }
1535 break;
1536 case 49:
1537 term.c.attr.bg = defaultbg;
1538 break;
1539 default:
1540 if(BETWEEN(attr[i], 30, 37)) {
1541 term.c.attr.fg = attr[i] - 30;
1542 } else if(BETWEEN(attr[i], 40, 47)) {
1543 term.c.attr.bg = attr[i] - 40;
1544 } else if(BETWEEN(attr[i], 90, 97)) {
1545 term.c.attr.fg = attr[i] - 90 + 8;
1546 } else if(BETWEEN(attr[i], 100, 107)) {
1547 term.c.attr.bg = attr[i] - 100 + 8;
1548 } else {
1549 fprintf(stderr,
1550 "erresc(default): gfx attr %d unknown\n",
1551 attr[i]), csidump();
1552 }
1553 break;
1554 }
1555 }
1556 }
1557
1558 void
1559 tsetscroll(int t, int b) {
1560 int temp;
1561
1562 LIMIT(t, 0, term.row-1);
1563 LIMIT(b, 0, term.row-1);
1564 if(t > b) {
1565 temp = t;
1566 t = b;
1567 b = temp;
1568 }
1569 term.top = t;
1570 term.bot = b;
1571 }
1572
1573 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1574
1575 void
1576 tsetmode(bool priv, bool set, int *args, int narg) {
1577 int *lim, mode;
1578 bool alt;
1579
1580 for(lim = args + narg; args < lim; ++args) {
1581 if(priv) {
1582 switch(*args) {
1583 break;
1584 case 1: /* DECCKM -- Cursor key */
1585 MODBIT(term.mode, set, MODE_APPCURSOR);
1586 break;
1587 case 5: /* DECSCNM -- Reverse video */
1588 mode = term.mode;
1589 MODBIT(term.mode, set, MODE_REVERSE);
1590 if(mode != term.mode)
1591 redraw(REDRAW_TIMEOUT);
1592 break;
1593 case 6: /* DECOM -- Origin */
1594 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1595 tmoveato(0, 0);
1596 break;
1597 case 7: /* DECAWM -- Auto wrap */
1598 MODBIT(term.mode, set, MODE_WRAP);
1599 break;
1600 case 0: /* Error (IGNORED) */
1601 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1602 case 3: /* DECCOLM -- Column (IGNORED) */
1603 case 4: /* DECSCLM -- Scroll (IGNORED) */
1604 case 8: /* DECARM -- Auto repeat (IGNORED) */
1605 case 18: /* DECPFF -- Printer feed (IGNORED) */
1606 case 19: /* DECPEX -- Printer extent (IGNORED) */
1607 case 42: /* DECNRCM -- National characters (IGNORED) */
1608 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1609 break;
1610 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1611 MODBIT(term.mode, !set, MODE_HIDE);
1612 break;
1613 case 1000: /* 1000,1002: enable xterm mouse report */
1614 MODBIT(term.mode, set, MODE_MOUSEBTN);
1615 MODBIT(term.mode, 0, MODE_MOUSEMOTION);
1616 break;
1617 case 1002:
1618 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1619 MODBIT(term.mode, 0, MODE_MOUSEBTN);
1620 break;
1621 case 1006:
1622 MODBIT(term.mode, set, MODE_MOUSESGR);
1623 break;
1624 case 1049: /* = 1047 and 1048 */
1625 case 47:
1626 case 1047: {
1627 alt = IS_SET(MODE_ALTSCREEN);
1628 if(alt) {
1629 tclearregion(0, 0, term.col-1,
1630 term.row-1, 0);
1631 }
1632 if(set ^ alt) /* set is always 1 or 0 */
1633 tswapscreen();
1634 if(*args != 1049)
1635 break;
1636 }
1637 /* pass through */
1638 case 1048:
1639 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1640 break;
1641 default:
1642 fprintf(stderr,
1643 "erresc: unknown private set/reset mode %d\n",
1644 *args);
1645 break;
1646 }
1647 } else {
1648 switch(*args) {
1649 case 0: /* Error (IGNORED) */
1650 break;
1651 case 2: /* KAM -- keyboard action */
1652 MODBIT(term.mode, set, MODE_KBDLOCK);
1653 break;
1654 case 4: /* IRM -- Insertion-replacement */
1655 MODBIT(term.mode, set, MODE_INSERT);
1656 break;
1657 case 12: /* SRM -- Send/Receive */
1658 MODBIT(term.mode, !set, MODE_ECHO);
1659 break;
1660 case 20: /* LNM -- Linefeed/new line */
1661 MODBIT(term.mode, set, MODE_CRLF);
1662 break;
1663 default:
1664 fprintf(stderr,
1665 "erresc: unknown set/reset mode %d\n",
1666 *args);
1667 break;
1668 }
1669 }
1670 }
1671 }
1672 #undef MODBIT
1673
1674
1675 void
1676 csihandle(void) {
1677 switch(csiescseq.mode) {
1678 default:
1679 unknown:
1680 fprintf(stderr, "erresc: unknown csi ");
1681 csidump();
1682 /* die(""); */
1683 break;
1684 case '@': /* ICH -- Insert <n> blank char */
1685 DEFAULT(csiescseq.arg[0], 1);
1686 tinsertblank(csiescseq.arg[0]);
1687 break;
1688 case 'A': /* CUU -- Cursor <n> Up */
1689 DEFAULT(csiescseq.arg[0], 1);
1690 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1691 break;
1692 case 'B': /* CUD -- Cursor <n> Down */
1693 case 'e': /* VPR --Cursor <n> Down */
1694 DEFAULT(csiescseq.arg[0], 1);
1695 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1696 break;
1697 case 'c': /* DA -- Device Attributes */
1698 if(csiescseq.arg[0] == 0)
1699 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1700 break;
1701 case 'C': /* CUF -- Cursor <n> Forward */
1702 case 'a': /* HPR -- Cursor <n> Forward */
1703 DEFAULT(csiescseq.arg[0], 1);
1704 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1705 break;
1706 case 'D': /* CUB -- Cursor <n> Backward */
1707 DEFAULT(csiescseq.arg[0], 1);
1708 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1709 break;
1710 case 'E': /* CNL -- Cursor <n> Down and first col */
1711 DEFAULT(csiescseq.arg[0], 1);
1712 tmoveto(0, term.c.y+csiescseq.arg[0]);
1713 break;
1714 case 'F': /* CPL -- Cursor <n> Up and first col */
1715 DEFAULT(csiescseq.arg[0], 1);
1716 tmoveto(0, term.c.y-csiescseq.arg[0]);
1717 break;
1718 case 'g': /* TBC -- Tabulation clear */
1719 switch(csiescseq.arg[0]) {
1720 case 0: /* clear current tab stop */
1721 term.tabs[term.c.x] = 0;
1722 break;
1723 case 3: /* clear all the tabs */
1724 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1725 break;
1726 default:
1727 goto unknown;
1728 }
1729 break;
1730 case 'G': /* CHA -- Move to <col> */
1731 case '`': /* HPA */
1732 DEFAULT(csiescseq.arg[0], 1);
1733 tmoveto(csiescseq.arg[0]-1, term.c.y);
1734 break;
1735 case 'H': /* CUP -- Move to <row> <col> */
1736 case 'f': /* HVP */
1737 DEFAULT(csiescseq.arg[0], 1);
1738 DEFAULT(csiescseq.arg[1], 1);
1739 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1740 break;
1741 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1742 DEFAULT(csiescseq.arg[0], 1);
1743 while(csiescseq.arg[0]--)
1744 tputtab(1);
1745 break;
1746 case 'J': /* ED -- Clear screen */
1747 sel.bx = -1;
1748 switch(csiescseq.arg[0]) {
1749 case 0: /* below */
1750 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 1);
1751 if(term.c.y < term.row-1) {
1752 tclearregion(0, term.c.y+1, term.col-1,
1753 term.row-1, 1);
1754 }
1755 break;
1756 case 1: /* above */
1757 if(term.c.y > 1)
1758 tclearregion(0, 0, term.col-1, term.c.y-1, 1);
1759 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1760 break;
1761 case 2: /* all */
1762 tclearregion(0, 0, term.col-1, term.row-1, 1);
1763 break;
1764 default:
1765 goto unknown;
1766 }
1767 break;
1768 case 'K': /* EL -- Clear line */
1769 switch(csiescseq.arg[0]) {
1770 case 0: /* right */
1771 tclearregion(term.c.x, term.c.y, term.col-1,
1772 term.c.y, 1);
1773 break;
1774 case 1: /* left */
1775 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1776 break;
1777 case 2: /* all */
1778 tclearregion(0, term.c.y, term.col-1, term.c.y, 1);
1779 break;
1780 }
1781 break;
1782 case 'S': /* SU -- Scroll <n> line up */
1783 DEFAULT(csiescseq.arg[0], 1);
1784 tscrollup(term.top, csiescseq.arg[0]);
1785 break;
1786 case 'T': /* SD -- Scroll <n> line down */
1787 DEFAULT(csiescseq.arg[0], 1);
1788 tscrolldown(term.top, csiescseq.arg[0]);
1789 break;
1790 case 'L': /* IL -- Insert <n> blank lines */
1791 DEFAULT(csiescseq.arg[0], 1);
1792 tinsertblankline(csiescseq.arg[0]);
1793 break;
1794 case 'l': /* RM -- Reset Mode */
1795 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1796 break;
1797 case 'M': /* DL -- Delete <n> lines */
1798 DEFAULT(csiescseq.arg[0], 1);
1799 tdeleteline(csiescseq.arg[0]);
1800 break;
1801 case 'X': /* ECH -- Erase <n> char */
1802 DEFAULT(csiescseq.arg[0], 1);
1803 tclearregion(term.c.x, term.c.y,
1804 term.c.x + csiescseq.arg[0] - 1, term.c.y, 1);
1805 break;
1806 case 'P': /* DCH -- Delete <n> char */
1807 DEFAULT(csiescseq.arg[0], 1);
1808 tdeletechar(csiescseq.arg[0]);
1809 break;
1810 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1811 DEFAULT(csiescseq.arg[0], 1);
1812 while(csiescseq.arg[0]--)
1813 tputtab(0);
1814 break;
1815 case 'd': /* VPA -- Move to <row> */
1816 DEFAULT(csiescseq.arg[0], 1);
1817 tmoveato(term.c.x, csiescseq.arg[0]-1);
1818 break;
1819 case 'h': /* SM -- Set terminal mode */
1820 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1821 break;
1822 case 'm': /* SGR -- Terminal attribute (color) */
1823 tsetattr(csiescseq.arg, csiescseq.narg);
1824 break;
1825 case 'r': /* DECSTBM -- Set Scrolling Region */
1826 if(csiescseq.priv) {
1827 goto unknown;
1828 } else {
1829 DEFAULT(csiescseq.arg[0], 1);
1830 DEFAULT(csiescseq.arg[1], term.row);
1831 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1832 tmoveato(0, 0);
1833 }
1834 break;
1835 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1836 tcursor(CURSOR_SAVE);
1837 break;
1838 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1839 tcursor(CURSOR_LOAD);
1840 break;
1841 }
1842 }
1843
1844 void
1845 csidump(void) {
1846 int i;
1847 uint c;
1848
1849 printf("ESC[");
1850 for(i = 0; i < csiescseq.len; i++) {
1851 c = csiescseq.buf[i] & 0xff;
1852 if(isprint(c)) {
1853 putchar(c);
1854 } else if(c == '\n') {
1855 printf("(\\n)");
1856 } else if(c == '\r') {
1857 printf("(\\r)");
1858 } else if(c == 0x1b) {
1859 printf("(\\e)");
1860 } else {
1861 printf("(%02x)", c);
1862 }
1863 }
1864 putchar('\n');
1865 }
1866
1867 void
1868 csireset(void) {
1869 memset(&csiescseq, 0, sizeof(csiescseq));
1870 }
1871
1872 void
1873 strhandle(void) {
1874 char *p = NULL;
1875 int i, j, narg;
1876
1877 strparse();
1878 narg = strescseq.narg;
1879
1880 switch(strescseq.type) {
1881 case ']': /* OSC -- Operating System Command */
1882 switch(i = atoi(strescseq.args[0])) {
1883 case 0:
1884 case 1:
1885 case 2:
1886 if(narg > 1)
1887 xsettitle(strescseq.args[1]);
1888 break;
1889 case 4: /* color set */
1890 if(narg < 3)
1891 break;
1892 p = strescseq.args[2];
1893 /* fall through */
1894 case 104: /* color reset, here p = NULL */
1895 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
1896 if (!xsetcolorname(j, p)) {
1897 fprintf(stderr, "erresc: invalid color %s\n", p);
1898 } else {
1899 /*
1900 * TODO if defaultbg color is changed, borders
1901 * are dirty
1902 */
1903 redraw(0);
1904 }
1905 break;
1906 default:
1907 fprintf(stderr, "erresc: unknown str ");
1908 strdump();
1909 break;
1910 }
1911 break;
1912 case 'k': /* old title set compatibility */
1913 xsettitle(strescseq.args[0]);
1914 break;
1915 case 'P': /* DSC -- Device Control String */
1916 case '_': /* APC -- Application Program Command */
1917 case '^': /* PM -- Privacy Message */
1918 default:
1919 fprintf(stderr, "erresc: unknown str ");
1920 strdump();
1921 /* die(""); */
1922 break;
1923 }
1924 }
1925
1926 void
1927 strparse(void) {
1928 char *p = strescseq.buf;
1929
1930 strescseq.narg = 0;
1931 strescseq.buf[strescseq.len] = '\0';
1932 while(p && strescseq.narg < STR_ARG_SIZ)
1933 strescseq.args[strescseq.narg++] = strsep(&p, ";");
1934 }
1935
1936 void
1937 strdump(void) {
1938 int i;
1939 uint c;
1940
1941 printf("ESC%c", strescseq.type);
1942 for(i = 0; i < strescseq.len; i++) {
1943 c = strescseq.buf[i] & 0xff;
1944 if(c == '\0') {
1945 return;
1946 } else if(isprint(c)) {
1947 putchar(c);
1948 } else if(c == '\n') {
1949 printf("(\\n)");
1950 } else if(c == '\r') {
1951 printf("(\\r)");
1952 } else if(c == 0x1b) {
1953 printf("(\\e)");
1954 } else {
1955 printf("(%02x)", c);
1956 }
1957 }
1958 printf("ESC\\\n");
1959 }
1960
1961 void
1962 strreset(void) {
1963 memset(&strescseq, 0, sizeof(strescseq));
1964 }
1965
1966 void
1967 tputtab(bool forward) {
1968 uint x = term.c.x;
1969
1970 if(forward) {
1971 if(x == term.col)
1972 return;
1973 for(++x; x < term.col && !term.tabs[x]; ++x)
1974 /* nothing */ ;
1975 } else {
1976 if(x == 0)
1977 return;
1978 for(--x; x > 0 && !term.tabs[x]; --x)
1979 /* nothing */ ;
1980 }
1981 tmoveto(x, term.c.y);
1982 }
1983
1984 void
1985 techo(char *buf, int len) {
1986 for(; len > 0; buf++, len--) {
1987 char c = *buf;
1988
1989 if(c == '\033') { /* escape */
1990 tputc("^", 1);
1991 tputc("[", 1);
1992 } else if(c < '\x20') { /* control code */
1993 if(c != '\n' && c != '\r' && c != '\t') {
1994 c |= '\x40';
1995 tputc("^", 1);
1996 }
1997 tputc(&c, 1);
1998 } else {
1999 break;
2000 }
2001 }
2002 if(len)
2003 tputc(buf, len);
2004 }
2005
2006 void
2007 tputc(char *c, int len) {
2008 uchar ascii = *c;
2009 bool control = ascii < '\x20' || ascii == 0177;
2010
2011 if(iofd != -1) {
2012 if(xwrite(iofd, c, len) < 0) {
2013 fprintf(stderr, "Error writing in %s:%s\n",
2014 opt_io, strerror(errno));
2015 close(iofd);
2016 iofd = -1;
2017 }
2018 }
2019
2020 /*
2021 * STR sequences must be checked before anything else
2022 * because it can use some control codes as part of the sequence.
2023 */
2024 if(term.esc & ESC_STR) {
2025 switch(ascii) {
2026 case '\033':
2027 term.esc = ESC_START | ESC_STR_END;
2028 break;
2029 case '\a': /* backwards compatibility to xterm */
2030 term.esc = 0;
2031 strhandle();
2032 break;
2033 default:
2034 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2035 memmove(&strescseq.buf[strescseq.len], c, len);
2036 strescseq.len += len;
2037 } else {
2038 /*
2039 * Here is a bug in terminals. If the user never sends
2040 * some code to stop the str or esc command, then st
2041 * will stop responding. But this is better than
2042 * silently failing with unknown characters. At least
2043 * then users will report back.
2044 *
2045 * In the case users ever get fixed, here is the code:
2046 */
2047 /*
2048 * term.esc = 0;
2049 * strhandle();
2050 */
2051 }
2052 }
2053 return;
2054 }
2055
2056 /*
2057 * Actions of control codes must be performed as soon they arrive
2058 * because they can be embedded inside a control sequence, and
2059 * they must not cause conflicts with sequences.
2060 */
2061 if(control) {
2062 switch(ascii) {
2063 case '\t': /* HT */
2064 tputtab(1);
2065 return;
2066 case '\b': /* BS */
2067 tmoveto(term.c.x-1, term.c.y);
2068 return;
2069 case '\r': /* CR */
2070 tmoveto(0, term.c.y);
2071 return;
2072 case '\f': /* LF */
2073 case '\v': /* VT */
2074 case '\n': /* LF */
2075 /* go to first col if the mode is set */
2076 tnewline(IS_SET(MODE_CRLF));
2077 return;
2078 case '\a': /* BEL */
2079 if(!(xw.state & WIN_FOCUSED))
2080 xseturgency(1);
2081 return;
2082 case '\033': /* ESC */
2083 csireset();
2084 term.esc = ESC_START;
2085 return;
2086 case '\016': /* SO */
2087 case '\017': /* SI */
2088 /*
2089 * Different charsets are hard to handle. Applications
2090 * should use the right alt charset escapes for the
2091 * only reason they still exist: line drawing. The
2092 * rest is incompatible history st should not support.
2093 */
2094 return;
2095 case '\032': /* SUB */
2096 case '\030': /* CAN */
2097 csireset();
2098 return;
2099 case '\005': /* ENQ (IGNORED) */
2100 case '\000': /* NUL (IGNORED) */
2101 case '\021': /* XON (IGNORED) */
2102 case '\023': /* XOFF (IGNORED) */
2103 case 0177: /* DEL (IGNORED) */
2104 return;
2105 }
2106 } else if(term.esc & ESC_START) {
2107 if(term.esc & ESC_CSI) {
2108 csiescseq.buf[csiescseq.len++] = ascii;
2109 if(BETWEEN(ascii, 0x40, 0x7E)
2110 || csiescseq.len >= \
2111 sizeof(csiescseq.buf)-1) {
2112 term.esc = 0;
2113 csiparse();
2114 csihandle();
2115 }
2116 } else if(term.esc & ESC_STR_END) {
2117 term.esc = 0;
2118 if(ascii == '\\')
2119 strhandle();
2120 } else if(term.esc & ESC_ALTCHARSET) {
2121 switch(ascii) {
2122 case '0': /* Line drawing set */
2123 term.c.attr.mode |= ATTR_GFX;
2124 break;
2125 case 'B': /* USASCII */
2126 term.c.attr.mode &= ~ATTR_GFX;
2127 break;
2128 case 'A': /* UK (IGNORED) */
2129 case '<': /* multinational charset (IGNORED) */
2130 case '5': /* Finnish (IGNORED) */
2131 case 'C': /* Finnish (IGNORED) */
2132 case 'K': /* German (IGNORED) */
2133 break;
2134 default:
2135 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2136 }
2137 term.esc = 0;
2138 } else if(term.esc & ESC_TEST) {
2139 if(ascii == '8') { /* DEC screen alignment test. */
2140 char E[UTF_SIZ] = "E";
2141 int x, y;
2142
2143 for(x = 0; x < term.col; ++x) {
2144 for(y = 0; y < term.row; ++y)
2145 tsetchar(E, &term.c.attr, x, y);
2146 }
2147 }
2148 term.esc = 0;
2149 } else {
2150 switch(ascii) {
2151 case '[':
2152 term.esc |= ESC_CSI;
2153 break;
2154 case '#':
2155 term.esc |= ESC_TEST;
2156 break;
2157 case 'P': /* DCS -- Device Control String */
2158 case '_': /* APC -- Application Program Command */
2159 case '^': /* PM -- Privacy Message */
2160 case ']': /* OSC -- Operating System Command */
2161 case 'k': /* old title set compatibility */
2162 strreset();
2163 strescseq.type = ascii;
2164 term.esc |= ESC_STR;
2165 break;
2166 case '(': /* set primary charset G0 */
2167 term.esc |= ESC_ALTCHARSET;
2168 break;
2169 case ')': /* set secondary charset G1 (IGNORED) */
2170 case '*': /* set tertiary charset G2 (IGNORED) */
2171 case '+': /* set quaternary charset G3 (IGNORED) */
2172 term.esc = 0;
2173 break;
2174 case 'D': /* IND -- Linefeed */
2175 if(term.c.y == term.bot) {
2176 tscrollup(term.top, 1);
2177 } else {
2178 tmoveto(term.c.x, term.c.y+1);
2179 }
2180 term.esc = 0;
2181 break;
2182 case 'E': /* NEL -- Next line */
2183 tnewline(1); /* always go to first col */
2184 term.esc = 0;
2185 break;
2186 case 'H': /* HTS -- Horizontal tab stop */
2187 term.tabs[term.c.x] = 1;
2188 term.esc = 0;
2189 break;
2190 case 'M': /* RI -- Reverse index */
2191 if(term.c.y == term.top) {
2192 tscrolldown(term.top, 1);
2193 } else {
2194 tmoveto(term.c.x, term.c.y-1);
2195 }
2196 term.esc = 0;
2197 break;
2198 case 'Z': /* DECID -- Identify Terminal */
2199 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2200 term.esc = 0;
2201 break;
2202 case 'c': /* RIS -- Reset to inital state */
2203 treset();
2204 term.esc = 0;
2205 xresettitle();
2206 break;
2207 case '=': /* DECPAM -- Application keypad */
2208 term.mode |= MODE_APPKEYPAD;
2209 term.esc = 0;
2210 break;
2211 case '>': /* DECPNM -- Normal keypad */
2212 term.mode &= ~MODE_APPKEYPAD;
2213 term.esc = 0;
2214 break;
2215 case '7': /* DECSC -- Save Cursor */
2216 tcursor(CURSOR_SAVE);
2217 term.esc = 0;
2218 break;
2219 case '8': /* DECRC -- Restore Cursor */
2220 tcursor(CURSOR_LOAD);
2221 term.esc = 0;
2222 break;
2223 case '\\': /* ST -- Stop */
2224 term.esc = 0;
2225 break;
2226 default:
2227 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2228 (uchar) ascii, isprint(ascii)? ascii:'.');
2229 term.esc = 0;
2230 }
2231 }
2232 /*
2233 * All characters which form part of a sequence are not
2234 * printed
2235 */
2236 return;
2237 }
2238 /*
2239 * Display control codes only if we are in graphic mode
2240 */
2241 if(control && !(term.c.attr.mode & ATTR_GFX))
2242 return;
2243 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2244 sel.bx = -1;
2245 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2246 tnewline(1); /* always go to first col */
2247
2248 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2249 memmove(&term.line[term.c.y][term.c.x+1],
2250 &term.line[term.c.y][term.c.x],
2251 (term.col - term.c.x - 1) * sizeof(Glyph));
2252 }
2253
2254 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2255 if(term.c.x+1 < term.col) {
2256 tmoveto(term.c.x+1, term.c.y);
2257 } else {
2258 term.c.state |= CURSOR_WRAPNEXT;
2259 }
2260 }
2261
2262 int
2263 tresize(int col, int row) {
2264 int i, x;
2265 int minrow = MIN(row, term.row);
2266 int mincol = MIN(col, term.col);
2267 int slide = term.c.y - row + 1;
2268 bool *bp;
2269
2270 if(col < 1 || row < 1)
2271 return 0;
2272
2273 /* free unneeded rows */
2274 i = 0;
2275 if(slide > 0) {
2276 /*
2277 * slide screen to keep cursor where we expect it -
2278 * tscrollup would work here, but we can optimize to
2279 * memmove because we're freeing the earlier lines
2280 */
2281 for(/* i = 0 */; i < slide; i++) {
2282 free(term.line[i]);
2283 free(term.alt[i]);
2284 }
2285 memmove(term.line, term.line + slide, row * sizeof(Line));
2286 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2287 }
2288 for(i += row; i < term.row; i++) {
2289 free(term.line[i]);
2290 free(term.alt[i]);
2291 }
2292
2293 /* resize to new height */
2294 term.line = xrealloc(term.line, row * sizeof(Line));
2295 term.alt = xrealloc(term.alt, row * sizeof(Line));
2296 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2297 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2298
2299 /* resize each row to new width, zero-pad if needed */
2300 for(i = 0; i < minrow; i++) {
2301 term.dirty[i] = 1;
2302 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2303 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2304 for(x = mincol; x < col; x++) {
2305 term.line[i][x].state = 0;
2306 term.alt[i][x].state = 0;
2307 }
2308 }
2309
2310 /* allocate any new rows */
2311 for(/* i == minrow */; i < row; i++) {
2312 term.dirty[i] = 1;
2313 term.line[i] = xcalloc(col, sizeof(Glyph));
2314 term.alt [i] = xcalloc(col, sizeof(Glyph));
2315 }
2316 if(col > term.col) {
2317 bp = term.tabs + term.col;
2318
2319 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2320 while(--bp > term.tabs && !*bp)
2321 /* nothing */ ;
2322 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2323 *bp = 1;
2324 }
2325 /* update terminal size */
2326 term.col = col;
2327 term.row = row;
2328 /* reset scrolling region */
2329 tsetscroll(0, row-1);
2330 /* make use of the LIMIT in tmoveto */
2331 tmoveto(term.c.x, term.c.y);
2332
2333 return (slide > 0);
2334 }
2335
2336 void
2337 xresize(int col, int row) {
2338 xw.tw = MAX(1, col * xw.cw);
2339 xw.th = MAX(1, row * xw.ch);
2340
2341 XFreePixmap(xw.dpy, xw.buf);
2342 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2343 DefaultDepth(xw.dpy, xw.scr));
2344 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg].pixel);
2345 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2346
2347 XftDrawChange(xw.draw, xw.buf);
2348 }
2349
2350 static inline ushort
2351 sixd_to_16bit(int x) {
2352 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2353 }
2354
2355 void
2356 xloadcols(void) {
2357 int i, r, g, b;
2358 XRenderColor color = { .alpha = 0xffff };
2359
2360 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2361 for(i = 0; i < LEN(colorname); i++) {
2362 if(!colorname[i])
2363 continue;
2364 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2365 die("Could not allocate color '%s'\n", colorname[i]);
2366 }
2367 }
2368
2369 /* load colors [16-255] ; same colors as xterm */
2370 for(i = 16, r = 0; r < 6; r++) {
2371 for(g = 0; g < 6; g++) {
2372 for(b = 0; b < 6; b++) {
2373 color.red = sixd_to_16bit(r);
2374 color.green = sixd_to_16bit(g);
2375 color.blue = sixd_to_16bit(b);
2376 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2377 die("Could not allocate color %d\n", i);
2378 }
2379 i++;
2380 }
2381 }
2382 }
2383
2384 for(r = 0; r < 24; r++, i++) {
2385 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2386 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2387 &dc.col[i])) {
2388 die("Could not allocate color %d\n", i);
2389 }
2390 }
2391 }
2392
2393 int
2394 xsetcolorname(int x, const char *name) {
2395 XRenderColor color = { .alpha = 0xffff };
2396 Colour colour;
2397 if (x < 0 || x > LEN(colorname))
2398 return -1;
2399 if(!name) {
2400 if(16 <= x && x < 16 + 216) {
2401 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2402 color.red = sixd_to_16bit(r);
2403 color.green = sixd_to_16bit(g);
2404 color.blue = sixd_to_16bit(b);
2405 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2406 return 0; /* something went wrong */
2407 dc.col[x] = colour;
2408 return 1;
2409 } else if (16 + 216 <= x && x < 256) {
2410 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2411 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2412 return 0; /* something went wrong */
2413 dc.col[x] = colour;
2414 return 1;
2415 } else {
2416 name = colorname[x];
2417 }
2418 }
2419 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2420 return 0;
2421 dc.col[x] = colour;
2422 return 1;
2423 }
2424
2425 void
2426 xtermclear(int col1, int row1, int col2, int row2) {
2427 XftDrawRect(xw.draw,
2428 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2429 borderpx + col1 * xw.cw,
2430 borderpx + row1 * xw.ch,
2431 (col2-col1+1) * xw.cw,
2432 (row2-row1+1) * xw.ch);
2433 }
2434
2435 /*
2436 * Absolute coordinates.
2437 */
2438 void
2439 xclear(int x1, int y1, int x2, int y2) {
2440 XftDrawRect(xw.draw,
2441 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2442 x1, y1, x2-x1, y2-y1);
2443 }
2444
2445 void
2446 xhints(void) {
2447 XClassHint class = {opt_class ? opt_class : termname, termname};
2448 XWMHints wm = {.flags = InputHint, .input = 1};
2449 XSizeHints *sizeh = NULL;
2450
2451 sizeh = XAllocSizeHints();
2452 if(xw.isfixed == False) {
2453 sizeh->flags = PSize | PResizeInc | PBaseSize;
2454 sizeh->height = xw.h;
2455 sizeh->width = xw.w;
2456 sizeh->height_inc = xw.ch;
2457 sizeh->width_inc = xw.cw;
2458 sizeh->base_height = 2 * borderpx;
2459 sizeh->base_width = 2 * borderpx;
2460 } else {
2461 sizeh->flags = PMaxSize | PMinSize;
2462 sizeh->min_width = sizeh->max_width = xw.fw;
2463 sizeh->min_height = sizeh->max_height = xw.fh;
2464 }
2465
2466 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2467 XFree(sizeh);
2468 }
2469
2470 int
2471 xloadfont(Font *f, FcPattern *pattern) {
2472 FcPattern *match;
2473 FcResult result;
2474
2475 match = FcFontMatch(NULL, pattern, &result);
2476 if(!match)
2477 return 1;
2478
2479 if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
2480 FcPatternDestroy(match);
2481 return 1;
2482 }
2483
2484 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2485 FcPatternDestroy(match);
2486 return 1;
2487 }
2488
2489 f->pattern = FcPatternDuplicate(pattern);
2490
2491 f->ascent = f->match->ascent;
2492 f->descent = f->match->descent;
2493 f->lbearing = 0;
2494 f->rbearing = f->match->max_advance_width;
2495
2496 f->height = f->ascent + f->descent;
2497 f->width = f->lbearing + f->rbearing;
2498
2499 return 0;
2500 }
2501
2502 void
2503 xloadfonts(char *fontstr, int fontsize) {
2504 FcPattern *pattern;
2505 FcResult result;
2506 double fontval;
2507
2508 if(fontstr[0] == '-') {
2509 pattern = XftXlfdParse(fontstr, False, False);
2510 } else {
2511 pattern = FcNameParse((FcChar8 *)fontstr);
2512 }
2513
2514 if(!pattern)
2515 die("st: can't open font %s\n", fontstr);
2516
2517 if(fontsize > 0) {
2518 FcPatternDel(pattern, FC_PIXEL_SIZE);
2519 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2520 usedfontsize = fontsize;
2521 } else {
2522 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2523 if(result == FcResultMatch) {
2524 usedfontsize = (int)fontval;
2525 } else {
2526 /*
2527 * Default font size is 12, if none given. This is to
2528 * have a known usedfontsize value.
2529 */
2530 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2531 usedfontsize = 12;
2532 }
2533 }
2534
2535 FcConfigSubstitute(0, pattern, FcMatchPattern);
2536 FcDefaultSubstitute(pattern);
2537
2538 if(xloadfont(&dc.font, pattern))
2539 die("st: can't open font %s\n", fontstr);
2540
2541 /* Setting character width and height. */
2542 xw.cw = dc.font.width;
2543 xw.ch = dc.font.height;
2544
2545 FcPatternDel(pattern, FC_SLANT);
2546 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2547 if(xloadfont(&dc.ifont, pattern))
2548 die("st: can't open font %s\n", fontstr);
2549
2550 FcPatternDel(pattern, FC_WEIGHT);
2551 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2552 if(xloadfont(&dc.ibfont, pattern))
2553 die("st: can't open font %s\n", fontstr);
2554
2555 FcPatternDel(pattern, FC_SLANT);
2556 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2557 if(xloadfont(&dc.bfont, pattern))
2558 die("st: can't open font %s\n", fontstr);
2559
2560 FcPatternDestroy(pattern);
2561 }
2562
2563 void
2564 xunloadfonts(void) {
2565 int i, ip;
2566
2567 /*
2568 * Free the loaded fonts in the font cache. This is done backwards
2569 * from the frccur.
2570 */
2571 for(i = 0, ip = frccur; i < frclen; i++, ip--) {
2572 if(ip < 0)
2573 ip = LEN(frc) - 1;
2574 XftFontClose(xw.dpy, frc[ip].font);
2575 }
2576 frccur = -1;
2577 frclen = 0;
2578
2579 XftFontClose(xw.dpy, dc.font.match);
2580 FcPatternDestroy(dc.font.pattern);
2581 FcFontSetDestroy(dc.font.set);
2582 XftFontClose(xw.dpy, dc.bfont.match);
2583 FcPatternDestroy(dc.bfont.pattern);
2584 FcFontSetDestroy(dc.bfont.set);
2585 XftFontClose(xw.dpy, dc.ifont.match);
2586 FcPatternDestroy(dc.ifont.pattern);
2587 FcFontSetDestroy(dc.ifont.set);
2588 XftFontClose(xw.dpy, dc.ibfont.match);
2589 FcPatternDestroy(dc.ibfont.pattern);
2590 FcFontSetDestroy(dc.ibfont.set);
2591 }
2592
2593 void
2594 xzoom(const Arg *arg) {
2595 xunloadfonts();
2596 xloadfonts(usedfont, usedfontsize + arg->i);
2597 cresize(0, 0);
2598 redraw(0);
2599 }
2600
2601 void
2602 xinit(void) {
2603 XSetWindowAttributes attrs;
2604 XGCValues gcvalues;
2605 Cursor cursor;
2606 Window parent;
2607 int sw, sh;
2608
2609 if(!(xw.dpy = XOpenDisplay(NULL)))
2610 die("Can't open display\n");
2611 xw.scr = XDefaultScreen(xw.dpy);
2612 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2613
2614 /* font */
2615 if(!FcInit())
2616 die("Could not init fontconfig.\n");
2617
2618 usedfont = (opt_font == NULL)? font : opt_font;
2619 xloadfonts(usedfont, 0);
2620
2621 /* colors */
2622 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2623 xloadcols();
2624
2625 /* adjust fixed window geometry */
2626 if(xw.isfixed) {
2627 sw = DisplayWidth(xw.dpy, xw.scr);
2628 sh = DisplayHeight(xw.dpy, xw.scr);
2629 if(xw.fx < 0)
2630 xw.fx = sw + xw.fx - xw.fw - 1;
2631 if(xw.fy < 0)
2632 xw.fy = sh + xw.fy - xw.fh - 1;
2633
2634 xw.h = xw.fh;
2635 xw.w = xw.fw;
2636 } else {
2637 /* window - default size */
2638 xw.h = 2 * borderpx + term.row * xw.ch;
2639 xw.w = 2 * borderpx + term.col * xw.cw;
2640 xw.fx = 0;
2641 xw.fy = 0;
2642 }
2643
2644 /* Events */
2645 attrs.background_pixel = dc.col[defaultbg].pixel;
2646 attrs.border_pixel = dc.col[defaultbg].pixel;
2647 attrs.bit_gravity = NorthWestGravity;
2648 attrs.event_mask = FocusChangeMask | KeyPressMask
2649 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2650 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2651 attrs.colormap = xw.cmap;
2652
2653 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2654 XRootWindow(xw.dpy, xw.scr);
2655 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2656 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2657 xw.vis,
2658 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2659 | CWColormap,
2660 &attrs);
2661
2662 memset(&gcvalues, 0, sizeof(gcvalues));
2663 gcvalues.graphics_exposures = False;
2664 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2665 &gcvalues);
2666 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2667 DefaultDepth(xw.dpy, xw.scr));
2668 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2669 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2670
2671 /* Xft rendering context */
2672 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2673
2674 /* input methods */
2675 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2676 XSetLocaleModifiers("@im=local");
2677 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2678 XSetLocaleModifiers("@im=");
2679 if((xw.xim = XOpenIM(xw.dpy,
2680 NULL, NULL, NULL)) == NULL) {
2681 die("XOpenIM failed. Could not open input"
2682 " device.\n");
2683 }
2684 }
2685 }
2686 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2687 | XIMStatusNothing, XNClientWindow, xw.win,
2688 XNFocusWindow, xw.win, NULL);
2689 if(xw.xic == NULL)
2690 die("XCreateIC failed. Could not obtain input method.\n");
2691
2692 /* white cursor, black outline */
2693 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2694 XDefineCursor(xw.dpy, xw.win, cursor);
2695 XRecolorCursor(xw.dpy, cursor,
2696 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2697 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2698
2699 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2700 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2701 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2702
2703 xresettitle();
2704 XMapWindow(xw.dpy, xw.win);
2705 xhints();
2706 XSync(xw.dpy, 0);
2707 }
2708
2709 void
2710 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2711 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2712 width = charlen * xw.cw, xp, i;
2713 int frp, frcflags;
2714 int u8fl, u8fblen, u8cblen, doesexist;
2715 char *u8c, *u8fs;
2716 long u8char;
2717 Font *font = &dc.font;
2718 FcResult fcres;
2719 FcPattern *fcpattern, *fontpattern;
2720 FcFontSet *fcsets[] = { NULL };
2721 FcCharSet *fccharset;
2722 Colour *fg = &dc.col[base.fg], *bg = &dc.col[base.bg],
2723 *temp, revfg, revbg;
2724 XRenderColor colfg, colbg;
2725
2726 frcflags = FRC_NORMAL;
2727
2728 if(base.mode & ATTR_BOLD) {
2729 if(BETWEEN(base.fg, 0, 7)) {
2730 /* basic system colors */
2731 fg = &dc.col[base.fg + 8];
2732 } else if(BETWEEN(base.fg, 16, 195)) {
2733 /* 256 colors */
2734 fg = &dc.col[base.fg + 36];
2735 } else if(BETWEEN(base.fg, 232, 251)) {
2736 /* greyscale */
2737 fg = &dc.col[base.fg + 4];
2738 }
2739 /*
2740 * Those ranges will not be brightened:
2741 * 8 - 15 – bright system colors
2742 * 196 - 231 – highest 256 color cube
2743 * 252 - 255 – brightest colors in greyscale
2744 */
2745 font = &dc.bfont;
2746 frcflags = FRC_BOLD;
2747 }
2748
2749 if(base.mode & ATTR_ITALIC) {
2750 font = &dc.ifont;
2751 frcflags = FRC_ITALIC;
2752 }
2753 if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2754 font = &dc.ibfont;
2755 frcflags = FRC_ITALICBOLD;
2756 }
2757
2758 if(IS_SET(MODE_REVERSE)) {
2759 if(fg == &dc.col[defaultfg]) {
2760 fg = &dc.col[defaultbg];
2761 } else {
2762 colfg.red = ~fg->color.red;
2763 colfg.green = ~fg->color.green;
2764 colfg.blue = ~fg->color.blue;
2765 colfg.alpha = fg->color.alpha;
2766 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2767 fg = &revfg;
2768 }
2769
2770 if(bg == &dc.col[defaultbg]) {
2771 bg = &dc.col[defaultfg];
2772 } else {
2773 colbg.red = ~bg->color.red;
2774 colbg.green = ~bg->color.green;
2775 colbg.blue = ~bg->color.blue;
2776 colbg.alpha = bg->color.alpha;
2777 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2778 bg = &revbg;
2779 }
2780 }
2781
2782 if(base.mode & ATTR_REVERSE) {
2783 temp = fg;
2784 fg = bg;
2785 bg = temp;
2786 }
2787
2788 /* Intelligent cleaning up of the borders. */
2789 if(x == 0) {
2790 xclear(0, (y == 0)? 0 : winy, borderpx,
2791 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2792 }
2793 if(x + charlen >= term.col) {
2794 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2795 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2796 }
2797 if(y == 0)
2798 xclear(winx, 0, winx + width, borderpx);
2799 if(y == term.row-1)
2800 xclear(winx, winy + xw.ch, winx + width, xw.h);
2801
2802 /* Clean up the region we want to draw to. */
2803 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2804
2805 fcsets[0] = font->set;
2806 for(xp = winx; bytelen > 0;) {
2807 /*
2808 * Search for the range in the to be printed string of glyphs
2809 * that are in the main font. Then print that range. If
2810 * some glyph is found that is not in the font, do the
2811 * fallback dance.
2812 */
2813 u8fs = s;
2814 u8fblen = 0;
2815 u8fl = 0;
2816 for(;;) {
2817 u8c = s;
2818 u8cblen = utf8decode(s, &u8char);
2819 s += u8cblen;
2820 bytelen -= u8cblen;
2821
2822 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
2823 if(!doesexist || bytelen <= 0) {
2824 if(bytelen <= 0) {
2825 if(doesexist) {
2826 u8fl++;
2827 u8fblen += u8cblen;
2828 }
2829 }
2830
2831 if(u8fl > 0) {
2832 XftDrawStringUtf8(xw.draw, fg,
2833 font->match, xp,
2834 winy + font->ascent,
2835 (FcChar8 *)u8fs,
2836 u8fblen);
2837 xp += font->width * u8fl;
2838 }
2839 break;
2840 }
2841
2842 u8fl++;
2843 u8fblen += u8cblen;
2844 }
2845 if(doesexist)
2846 break;
2847
2848 frp = frccur;
2849 /* Search the font cache. */
2850 for(i = 0; i < frclen; i++, frp--) {
2851 if(frp <= 0)
2852 frp = LEN(frc) - 1;
2853
2854 if(frc[frp].c == u8char
2855 && frc[frp].flags == frcflags) {
2856 break;
2857 }
2858 }
2859
2860 /* Nothing was found. */
2861 if(i >= frclen) {
2862 /*
2863 * Nothing was found in the cache. Now use
2864 * some dozen of Fontconfig calls to get the
2865 * font for one single character.
2866 */
2867 fcpattern = FcPatternDuplicate(font->pattern);
2868 fccharset = FcCharSetCreate();
2869
2870 FcCharSetAddChar(fccharset, u8char);
2871 FcPatternAddCharSet(fcpattern, FC_CHARSET,
2872 fccharset);
2873 FcPatternAddBool(fcpattern, FC_SCALABLE,
2874 FcTrue);
2875
2876 FcConfigSubstitute(0, fcpattern,
2877 FcMatchPattern);
2878 FcDefaultSubstitute(fcpattern);
2879
2880 fontpattern = FcFontSetMatch(0, fcsets,
2881 FcTrue, fcpattern, &fcres);
2882
2883 /*
2884 * Overwrite or create the new cache entry
2885 * entry.
2886 */
2887 frccur++;
2888 frclen++;
2889 if(frccur >= LEN(frc))
2890 frccur = 0;
2891 if(frclen > LEN(frc)) {
2892 frclen = LEN(frc);
2893 XftFontClose(xw.dpy, frc[frccur].font);
2894 }
2895
2896 frc[frccur].font = XftFontOpenPattern(xw.dpy,
2897 fontpattern);
2898 frc[frccur].c = u8char;
2899 frc[frccur].flags = frcflags;
2900
2901 FcPatternDestroy(fcpattern);
2902 FcCharSetDestroy(fccharset);
2903
2904 frp = frccur;
2905 }
2906
2907 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
2908 xp, winy + frc[frp].font->ascent,
2909 (FcChar8 *)u8c, u8cblen);
2910
2911 xp += font->width;
2912 }
2913
2914 /*
2915 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
2916 winy + font->ascent, (FcChar8 *)s, bytelen);
2917 */
2918
2919 if(base.mode & ATTR_UNDERLINE) {
2920 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
2921 width, 1);
2922 }
2923 }
2924
2925 void
2926 xdrawcursor(void) {
2927 static int oldx = 0, oldy = 0;
2928 int sl;
2929 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs, 0};
2930
2931 LIMIT(oldx, 0, term.col-1);
2932 LIMIT(oldy, 0, term.row-1);
2933
2934 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2935 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2936
2937 /* remove the old cursor */
2938 if(term.line[oldy][oldx].state & GLYPH_SET) {
2939 sl = utf8size(term.line[oldy][oldx].c);
2940 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2941 oldy, 1, sl);
2942 } else {
2943 xtermclear(oldx, oldy, oldx, oldy);
2944 }
2945
2946 /* draw the new one */
2947 if(!(IS_SET(MODE_HIDE))) {
2948 if(!(xw.state & WIN_FOCUSED))
2949 g.bg = defaultucs;
2950
2951 if(IS_SET(MODE_REVERSE))
2952 g.mode |= ATTR_REVERSE, g.fg = defaultcs, g.bg = defaultfg;
2953
2954 sl = utf8size(g.c);
2955 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2956 oldx = term.c.x, oldy = term.c.y;
2957 }
2958 }
2959
2960
2961 void
2962 xsettitle(char *p) {
2963 XTextProperty prop;
2964
2965 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
2966 &prop);
2967 XSetWMName(xw.dpy, xw.win, &prop);
2968 }
2969
2970 void
2971 xresettitle(void) {
2972 xsettitle(opt_title ? opt_title : "st");
2973 }
2974
2975 void
2976 redraw(int timeout) {
2977 struct timespec tv = {0, timeout * 1000};
2978
2979 tfulldirt();
2980 draw();
2981
2982 if(timeout > 0) {
2983 nanosleep(&tv, NULL);
2984 XSync(xw.dpy, False); /* necessary for a good tput flash */
2985 }
2986 }
2987
2988 void
2989 draw(void) {
2990 drawregion(0, 0, term.col, term.row);
2991 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
2992 xw.h, 0, 0);
2993 XSetForeground(xw.dpy, dc.gc,
2994 dc.col[IS_SET(MODE_REVERSE)?
2995 defaultfg : defaultbg].pixel);
2996 }
2997
2998 void
2999 drawregion(int x1, int y1, int x2, int y2) {
3000 int ic, ib, x, y, ox, sl;
3001 Glyph base, new;
3002 char buf[DRAW_BUF_SIZ];
3003 bool ena_sel = sel.bx != -1;
3004
3005 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3006 ena_sel = 0;
3007
3008 if(!(xw.state & WIN_VISIBLE))
3009 return;
3010
3011 for(y = y1; y < y2; y++) {
3012 if(!term.dirty[y])
3013 continue;
3014
3015 xtermclear(0, y, term.col, y);
3016 term.dirty[y] = 0;
3017 base = term.line[y][0];
3018 ic = ib = ox = 0;
3019 for(x = x1; x < x2; x++) {
3020 new = term.line[y][x];
3021 if(ena_sel && *(new.c) && selected(x, y))
3022 new.mode ^= ATTR_REVERSE;
3023 if(ib > 0 && (!(new.state & GLYPH_SET)
3024 || ATTRCMP(base, new)
3025 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3026 xdraws(buf, base, ox, y, ic, ib);
3027 ic = ib = 0;
3028 }
3029 if(new.state & GLYPH_SET) {
3030 if(ib == 0) {
3031 ox = x;
3032 base = new;
3033 }
3034
3035 sl = utf8size(new.c);
3036 memcpy(buf+ib, new.c, sl);
3037 ib += sl;
3038 ++ic;
3039 }
3040 }
3041 if(ib > 0)
3042 xdraws(buf, base, ox, y, ic, ib);
3043 }
3044 xdrawcursor();
3045 }
3046
3047 void
3048 expose(XEvent *ev) {
3049 XExposeEvent *e = &ev->xexpose;
3050
3051 if(xw.state & WIN_REDRAW) {
3052 if(!e->count)
3053 xw.state &= ~WIN_REDRAW;
3054 }
3055 redraw(0);
3056 }
3057
3058 void
3059 visibility(XEvent *ev) {
3060 XVisibilityEvent *e = &ev->xvisibility;
3061
3062 if(e->state == VisibilityFullyObscured) {
3063 xw.state &= ~WIN_VISIBLE;
3064 } else if(!(xw.state & WIN_VISIBLE)) {
3065 /* need a full redraw for next Expose, not just a buf copy */
3066 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3067 }
3068 }
3069
3070 void
3071 unmap(XEvent *ev) {
3072 xw.state &= ~WIN_VISIBLE;
3073 }
3074
3075 void
3076 xseturgency(int add) {
3077 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3078
3079 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3080 XSetWMHints(xw.dpy, xw.win, h);
3081 XFree(h);
3082 }
3083
3084 void
3085 focus(XEvent *ev) {
3086 XFocusChangeEvent *e = &ev->xfocus;
3087
3088 if(e->mode == NotifyGrab)
3089 return;
3090
3091 if(ev->type == FocusIn) {
3092 XSetICFocus(xw.xic);
3093 xw.state |= WIN_FOCUSED;
3094 xseturgency(0);
3095 } else {
3096 XUnsetICFocus(xw.xic);
3097 xw.state &= ~WIN_FOCUSED;
3098 }
3099 }
3100
3101 inline bool
3102 match(uint mask, uint state) {
3103 state &= ~(ignoremod);
3104
3105 if(mask == XK_NO_MOD && state)
3106 return false;
3107 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3108 return false;
3109 if((state & mask) != state)
3110 return false;
3111 return true;
3112 }
3113
3114 void
3115 numlock(const Arg *dummy) {
3116 term.numlock ^= 1;
3117 }
3118
3119 char*
3120 kmap(KeySym k, uint state) {
3121 uint mask;
3122 Key *kp;
3123 int i;
3124
3125 /* Check for mapped keys out of X11 function keys. */
3126 for(i = 0; i < LEN(mappedkeys); i++) {
3127 if(mappedkeys[i] == k)
3128 break;
3129 }
3130 if(i == LEN(mappedkeys)) {
3131 if((k & 0xFFFF) < 0xFD00)
3132 return NULL;
3133 }
3134
3135 for(kp = key; kp < key + LEN(key); kp++) {
3136 mask = kp->mask;
3137
3138 if(kp->k != k)
3139 continue;
3140
3141 if(!match(mask, state))
3142 continue;
3143
3144 if(kp->appkey > 0) {
3145 if(!IS_SET(MODE_APPKEYPAD))
3146 continue;
3147 if(term.numlock && kp->appkey == 2)
3148 continue;
3149 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3150 continue;
3151 }
3152
3153 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3154 (kp->appcursor > 0
3155 && !IS_SET(MODE_APPCURSOR))) {
3156 continue;
3157 }
3158
3159 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3160 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3161 continue;
3162 }
3163
3164 return kp->s;
3165 }
3166
3167 return NULL;
3168 }
3169
3170 void
3171 kpress(XEvent *ev) {
3172 XKeyEvent *e = &ev->xkey;
3173 KeySym ksym;
3174 char xstr[31], buf[32], *customkey, *cp = buf;
3175 int len;
3176 Status status;
3177 Shortcut *bp;
3178
3179 if(IS_SET(MODE_KBDLOCK))
3180 return;
3181
3182 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3183 e->state &= ~Mod2Mask;
3184 /* 1. shortcuts */
3185 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3186 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3187 bp->func(&(bp->arg));
3188 return;
3189 }
3190 }
3191
3192 /* 2. custom keys from config.h */
3193 if((customkey = kmap(ksym, e->state))) {
3194 len = strlen(customkey);
3195 memcpy(buf, customkey, len);
3196 /* 2. hardcoded (overrides X lookup) */
3197 } else {
3198 if(len == 0)
3199 return;
3200
3201 if(len == 1 && e->state & Mod1Mask)
3202 *cp++ = '\033';
3203
3204 memcpy(cp, xstr, len);
3205 len = cp - buf + len;
3206 }
3207
3208 ttywrite(buf, len);
3209 if(IS_SET(MODE_ECHO))
3210 techo(buf, len);
3211 }
3212
3213
3214 void
3215 cmessage(XEvent *e) {
3216 /*
3217 * See xembed specs
3218 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3219 */
3220 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3221 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3222 xw.state |= WIN_FOCUSED;
3223 xseturgency(0);
3224 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3225 xw.state &= ~WIN_FOCUSED;
3226 }
3227 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3228 /* Send SIGHUP to shell */
3229 kill(pid, SIGHUP);
3230 exit(EXIT_SUCCESS);
3231 }
3232 }
3233
3234 void
3235 cresize(int width, int height) {
3236 int col, row;
3237
3238 if(width != 0)
3239 xw.w = width;
3240 if(height != 0)
3241 xw.h = height;
3242
3243 col = (xw.w - 2 * borderpx) / xw.cw;
3244 row = (xw.h - 2 * borderpx) / xw.ch;
3245
3246 tresize(col, row);
3247 xresize(col, row);
3248 ttyresize();
3249 }
3250
3251 void
3252 resize(XEvent *e) {
3253 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3254 return;
3255
3256 cresize(e->xconfigure.width, e->xconfigure.height);
3257 }
3258
3259 void
3260 run(void) {
3261 XEvent ev;
3262 fd_set rfd;
3263 int xfd = XConnectionNumber(xw.dpy), xev;
3264 struct timeval drawtimeout, *tv = NULL, now, last;
3265
3266 gettimeofday(&last, NULL);
3267
3268 for(xev = actionfps;;) {
3269 FD_ZERO(&rfd);
3270 FD_SET(cmdfd, &rfd);
3271 FD_SET(xfd, &rfd);
3272 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3273 if(errno == EINTR)
3274 continue;
3275 die("select failed: %s\n", SERRNO);
3276 }
3277
3278 gettimeofday(&now, NULL);
3279 drawtimeout.tv_sec = 0;
3280 drawtimeout.tv_usec = (1000/xfps) * 1000;
3281 tv = &drawtimeout;
3282
3283 if(FD_ISSET(cmdfd, &rfd))
3284 ttyread();
3285
3286 if(FD_ISSET(xfd, &rfd))
3287 xev = actionfps;
3288
3289 if(TIMEDIFF(now, last) > \
3290 (xev ? (1000/xfps) : (1000/actionfps))) {
3291 while(XPending(xw.dpy)) {
3292 XNextEvent(xw.dpy, &ev);
3293 if(XFilterEvent(&ev, None))
3294 continue;
3295 if(handler[ev.type])
3296 (handler[ev.type])(&ev);
3297 }
3298
3299 draw();
3300 XFlush(xw.dpy);
3301 last = now;
3302
3303 if(xev && !FD_ISSET(xfd, &rfd))
3304 xev--;
3305 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd))
3306 tv = NULL;
3307 }
3308 }
3309 }
3310
3311 int
3312 main(int argc, char *argv[]) {
3313 int i, bitm, xr, yr;
3314 uint wr, hr;
3315
3316 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3317 xw.isfixed = False;
3318
3319 for(i = 1; i < argc; i++) {
3320 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
3321 case 'c':
3322 if(++i < argc)
3323 opt_class = argv[i];
3324 break;
3325 case 'e':
3326 /* eat all remaining arguments */
3327 if(++i < argc)
3328 opt_cmd = &argv[i];
3329 goto run;
3330 case 'f':
3331 if(++i < argc)
3332 opt_font = argv[i];
3333 break;
3334 case 'g':
3335 if(++i >= argc)
3336 break;
3337
3338 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
3339 if(bitm & XValue)
3340 xw.fx = xr;
3341 if(bitm & YValue)
3342 xw.fy = yr;
3343 if(bitm & WidthValue)
3344 xw.fw = (int)wr;
3345 if(bitm & HeightValue)
3346 xw.fh = (int)hr;
3347 if(bitm & XNegative && xw.fx == 0)
3348 xw.fx = -1;
3349 if(bitm & XNegative && xw.fy == 0)
3350 xw.fy = -1;
3351
3352 if(xw.fh != 0 && xw.fw != 0)
3353 xw.isfixed = True;
3354 break;
3355 case 'o':
3356 if(++i < argc)
3357 opt_io = argv[i];
3358 break;
3359 case 't':
3360 if(++i < argc)
3361 opt_title = argv[i];
3362 break;
3363 case 'v':
3364 default:
3365 die(USAGE);
3366 case 'w':
3367 if(++i < argc)
3368 opt_embed = argv[i];
3369 break;
3370 }
3371 }
3372
3373 run:
3374 setlocale(LC_CTYPE, "");
3375 XSetLocaleModifiers("");
3376 tnew(80, 24);
3377 xinit();
3378 ttynew();
3379 selinit();
3380 run();
3381
3382 return 0;
3383 }
3384