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9587886f8191edeec2be43429ce1bbb50b2ad8b4
[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 #include "arg.h"
31
32 char *argv0;
33
34 #define Glyph Glyph_
35 #define Font Font_
36 #define Draw XftDraw *
37 #define Colour XftColor
38 #define Colourmap Colormap
39
40 #if defined(__linux)
41 #include <pty.h>
42 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
43 #include <util.h>
44 #elif defined(__FreeBSD__) || defined(__DragonFly__)
45 #include <libutil.h>
46 #endif
47
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);
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
653 return BETWEEN(x, bx, ex);
654 }
655
656 if(sel.type == SEL_RECTANGULAR) {
657 return ((sel.b.y <= y && y <= sel.e.y)
658 && (sel.b.x <= x && x <= sel.e.x));
659 }
660 return ((sel.b.y < y && y < sel.e.y)
661 || (y == sel.e.y && x <= sel.e.x))
662 || (y == sel.b.y && x >= sel.b.x
663 && (x <= sel.e.x || sel.b.y != sel.e.y));
664 }
665
666 void
667 getbuttoninfo(XEvent *e) {
668 int type;
669 uint state = e->xbutton.state &~Button1Mask;
670
671 sel.alt = IS_SET(MODE_ALTSCREEN);
672
673 sel.ex = x2col(e->xbutton.x);
674 sel.ey = y2row(e->xbutton.y);
675
676 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
677 sel.b.y = MIN(sel.by, sel.ey);
678 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
679 sel.e.y = MAX(sel.by, sel.ey);
680
681 sel.type = SEL_REGULAR;
682 for(type = 1; type < LEN(selmasks); ++type) {
683 if(match(selmasks[type], state)) {
684 sel.type = type;
685 break;
686 }
687 }
688 }
689
690 void
691 mousereport(XEvent *e) {
692 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
693 button = e->xbutton.button, state = e->xbutton.state,
694 len;
695 char buf[40];
696 static int ob, ox, oy;
697
698 /* from urxvt */
699 if(e->xbutton.type == MotionNotify) {
700 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
701 return;
702 button = ob + 32;
703 ox = x, oy = y;
704 } else if(!IS_SET(MODE_MOUSESGR)
705 && (e->xbutton.type == ButtonRelease
706 || button == AnyButton)) {
707 button = 3;
708 } else {
709 button -= Button1;
710 if(button >= 3)
711 button += 64 - 3;
712 if(e->xbutton.type == ButtonPress) {
713 ob = button;
714 ox = x, oy = y;
715 }
716 }
717
718 button += (state & ShiftMask ? 4 : 0)
719 + (state & Mod4Mask ? 8 : 0)
720 + (state & ControlMask ? 16 : 0);
721
722 len = 0;
723 if(IS_SET(MODE_MOUSESGR)) {
724 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
725 button, x+1, y+1,
726 e->xbutton.type == ButtonRelease ? 'm' : 'M');
727 } else if(x < 223 && y < 223) {
728 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
729 32+button, 32+x+1, 32+y+1);
730 } else {
731 return;
732 }
733
734 ttywrite(buf, len);
735 }
736
737 void
738 bpress(XEvent *e) {
739 if(IS_SET(MODE_MOUSE)) {
740 mousereport(e);
741 } else if(e->xbutton.button == Button1) {
742 if(sel.bx != -1) {
743 sel.bx = -1;
744 tsetdirt(sel.b.y, sel.e.y);
745 draw();
746 }
747 sel.mode = 1;
748 sel.type = SEL_REGULAR;
749 sel.ex = sel.bx = x2col(e->xbutton.x);
750 sel.ey = sel.by = y2row(e->xbutton.y);
751 } else if(e->xbutton.button == Button4) {
752 ttywrite("\031", 1);
753 } else if(e->xbutton.button == Button5) {
754 ttywrite("\005", 1);
755 }
756 }
757
758 void
759 selcopy(void) {
760 char *str, *ptr, *p;
761 int x, y, bufsize, isselected = 0, size;
762 Glyph *gp, *last;
763
764 if(sel.bx == -1) {
765 str = NULL;
766 } else {
767 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
768 ptr = str = xmalloc(bufsize);
769
770 /* append every set & selected glyph to the selection */
771 for(y = sel.b.y; y < sel.e.y + 1; y++) {
772 isselected = 0;
773 gp = &term.line[y][0];
774 last = gp + term.col;
775
776 while(--last >= gp && !((last->state & GLYPH_SET) && \
777 selected(last - gp, y) && strcmp(last->c, " ") != 0))
778 /* nothing */;
779
780 for(x = 0; gp <= last; x++, ++gp) {
781 if(!selected(x, y)) {
782 continue;
783 } else {
784 isselected = 1;
785 }
786
787 p = (gp->state & GLYPH_SET) ? gp->c : " ";
788 size = utf8size(p);
789 memcpy(ptr, p, size);
790 ptr += size;
791 }
792
793 /*
794 * Copy and pasting of line endings is inconsistent
795 * in the inconsistent terminal and GUI world.
796 * The best solution seems like to produce '\n' when
797 * something is copied from st and convert '\n' to
798 * '\r', when something to be pasted is received by
799 * st.
800 * FIXME: Fix the computer world.
801 */
802 if(isselected && y < sel.e.y)
803 *ptr++ = '\n';
804 }
805 *ptr = 0;
806 }
807 xsetsel(str);
808 }
809
810 void
811 selnotify(XEvent *e) {
812 ulong nitems, ofs, rem;
813 int format;
814 uchar *data, *last, *repl;
815 Atom type;
816
817 ofs = 0;
818 do {
819 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
820 False, AnyPropertyType, &type, &format,
821 &nitems, &rem, &data)) {
822 fprintf(stderr, "Clipboard allocation failed\n");
823 return;
824 }
825
826 /*
827 * As seen in selcopy:
828 * Line endings are inconsistent in the terminal and GUI world
829 * copy and pasting. When receiving some selection data,
830 * replace all '\n' with '\r'.
831 * FIXME: Fix the computer world.
832 */
833 repl = data;
834 last = data + nitems * format / 8;
835 while((repl = memchr(repl, '\n', last - repl))) {
836 *repl++ = '\r';
837 }
838
839 ttywrite((const char *)data, nitems * format / 8);
840 XFree(data);
841 /* number of 32-bit chunks returned */
842 ofs += nitems * format / 32;
843 } while(rem > 0);
844 }
845
846 void
847 selpaste(const Arg *dummy) {
848 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
849 xw.win, CurrentTime);
850 }
851
852 void
853 clippaste(const Arg *dummy) {
854 Atom clipboard;
855
856 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
857 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
858 xw.win, CurrentTime);
859 }
860
861 void
862 selclear(XEvent *e) {
863 if(sel.bx == -1)
864 return;
865 sel.bx = -1;
866 tsetdirt(sel.b.y, sel.e.y);
867 }
868
869 void
870 selrequest(XEvent *e) {
871 XSelectionRequestEvent *xsre;
872 XSelectionEvent xev;
873 Atom xa_targets, string;
874
875 xsre = (XSelectionRequestEvent *) e;
876 xev.type = SelectionNotify;
877 xev.requestor = xsre->requestor;
878 xev.selection = xsre->selection;
879 xev.target = xsre->target;
880 xev.time = xsre->time;
881 /* reject */
882 xev.property = None;
883
884 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
885 if(xsre->target == xa_targets) {
886 /* respond with the supported type */
887 string = sel.xtarget;
888 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
889 XA_ATOM, 32, PropModeReplace,
890 (uchar *) &string, 1);
891 xev.property = xsre->property;
892 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
893 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
894 xsre->target, 8, PropModeReplace,
895 (uchar *) sel.clip, strlen(sel.clip));
896 xev.property = xsre->property;
897 }
898
899 /* all done, send a notification to the listener */
900 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
901 fprintf(stderr, "Error sending SelectionNotify event\n");
902 }
903
904 void
905 xsetsel(char *str) {
906 /* register the selection for both the clipboard and the primary */
907 Atom clipboard;
908
909 free(sel.clip);
910 sel.clip = str;
911
912 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
913
914 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
915 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
916 }
917
918 void
919 brelease(XEvent *e) {
920 struct timeval now;
921
922 if(IS_SET(MODE_MOUSE)) {
923 mousereport(e);
924 return;
925 }
926
927 if(e->xbutton.button == Button2) {
928 selpaste(NULL);
929 } else if(e->xbutton.button == Button1) {
930 sel.mode = 0;
931 getbuttoninfo(e);
932 term.dirty[sel.ey] = 1;
933 if(sel.bx == sel.ex && sel.by == sel.ey) {
934 sel.bx = -1;
935 gettimeofday(&now, NULL);
936
937 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
938 /* triple click on the line */
939 sel.b.x = sel.bx = 0;
940 sel.e.x = sel.ex = term.col;
941 sel.b.y = sel.e.y = sel.ey;
942 selcopy();
943 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
944 /* double click to select word */
945 sel.bx = sel.ex;
946 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
947 term.line[sel.ey][sel.bx-1].c[0] != ' ') {
948 sel.bx--;
949 }
950 sel.b.x = sel.bx;
951 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
952 term.line[sel.ey][sel.ex+1].c[0] != ' ') {
953 sel.ex++;
954 }
955 sel.e.x = sel.ex;
956 sel.b.y = sel.e.y = sel.ey;
957 selcopy();
958 }
959 } else {
960 selcopy();
961 }
962 }
963
964 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
965 gettimeofday(&sel.tclick1, NULL);
966 }
967
968 void
969 bmotion(XEvent *e) {
970 int oldey, oldex, oldsby, oldsey;
971
972 if(IS_SET(MODE_MOUSE)) {
973 mousereport(e);
974 return;
975 }
976
977 if(!sel.mode)
978 return;
979
980 oldey = sel.ey;
981 oldex = sel.ex;
982 oldsby = sel.b.y;
983 oldsey = sel.e.y;
984 getbuttoninfo(e);
985
986 if(oldey != sel.ey || oldex != sel.ex) {
987 tsetdirt(MIN(sel.b.y, oldsby), MAX(sel.e.y, oldsey));
988 }
989 }
990
991 void
992 die(const char *errstr, ...) {
993 va_list ap;
994
995 va_start(ap, errstr);
996 vfprintf(stderr, errstr, ap);
997 va_end(ap);
998 exit(EXIT_FAILURE);
999 }
1000
1001 void
1002 execsh(void) {
1003 char **args;
1004 char *envshell = getenv("SHELL");
1005 const struct passwd *pass = getpwuid(getuid());
1006 char buf[sizeof(long) * 8 + 1];
1007
1008 unsetenv("COLUMNS");
1009 unsetenv("LINES");
1010 unsetenv("TERMCAP");
1011
1012 if(pass) {
1013 setenv("LOGNAME", pass->pw_name, 1);
1014 setenv("USER", pass->pw_name, 1);
1015 setenv("SHELL", pass->pw_shell, 0);
1016 setenv("HOME", pass->pw_dir, 0);
1017 }
1018
1019 snprintf(buf, sizeof(buf), "%lu", xw.win);
1020 setenv("WINDOWID", buf, 1);
1021
1022 signal(SIGCHLD, SIG_DFL);
1023 signal(SIGHUP, SIG_DFL);
1024 signal(SIGINT, SIG_DFL);
1025 signal(SIGQUIT, SIG_DFL);
1026 signal(SIGTERM, SIG_DFL);
1027 signal(SIGALRM, SIG_DFL);
1028
1029 DEFAULT(envshell, shell);
1030 setenv("TERM", termname, 1);
1031 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1032 execvp(args[0], args);
1033 exit(EXIT_FAILURE);
1034 }
1035
1036 void
1037 sigchld(int a) {
1038 int stat = 0;
1039
1040 if(waitpid(pid, &stat, 0) < 0)
1041 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1042
1043 if(WIFEXITED(stat)) {
1044 exit(WEXITSTATUS(stat));
1045 } else {
1046 exit(EXIT_FAILURE);
1047 }
1048 }
1049
1050 void
1051 ttynew(void) {
1052 int m, s;
1053 struct winsize w = {term.row, term.col, 0, 0};
1054
1055 /* seems to work fine on linux, openbsd and freebsd */
1056 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1057 die("openpty failed: %s\n", SERRNO);
1058
1059 switch(pid = fork()) {
1060 case -1:
1061 die("fork failed\n");
1062 break;
1063 case 0:
1064 setsid(); /* create a new process group */
1065 dup2(s, STDIN_FILENO);
1066 dup2(s, STDOUT_FILENO);
1067 dup2(s, STDERR_FILENO);
1068 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1069 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1070 close(s);
1071 close(m);
1072 execsh();
1073 break;
1074 default:
1075 close(s);
1076 cmdfd = m;
1077 signal(SIGCHLD, sigchld);
1078 if(opt_io) {
1079 iofd = (!strcmp(opt_io, "-")) ?
1080 STDOUT_FILENO :
1081 open(opt_io, O_WRONLY | O_CREAT, 0666);
1082 if(iofd < 0) {
1083 fprintf(stderr, "Error opening %s:%s\n",
1084 opt_io, strerror(errno));
1085 }
1086 }
1087 }
1088 }
1089
1090 void
1091 dump(char c) {
1092 static int col;
1093
1094 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1095 if(++col % 10 == 0)
1096 fprintf(stderr, "\n");
1097 }
1098
1099 void
1100 ttyread(void) {
1101 static char buf[BUFSIZ];
1102 static int buflen = 0;
1103 char *ptr;
1104 char s[UTF_SIZ];
1105 int charsize; /* size of utf8 char in bytes */
1106 long utf8c;
1107 int ret;
1108
1109 /* append read bytes to unprocessed bytes */
1110 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1111 die("Couldn't read from shell: %s\n", SERRNO);
1112
1113 /* process every complete utf8 char */
1114 buflen += ret;
1115 ptr = buf;
1116 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1117 charsize = utf8decode(ptr, &utf8c);
1118 utf8encode(&utf8c, s);
1119 tputc(s, charsize);
1120 ptr += charsize;
1121 buflen -= charsize;
1122 }
1123
1124 /* keep any uncomplete utf8 char for the next call */
1125 memmove(buf, ptr, buflen);
1126 }
1127
1128 void
1129 ttywrite(const char *s, size_t n) {
1130 if(write(cmdfd, s, n) == -1)
1131 die("write error on tty: %s\n", SERRNO);
1132 }
1133
1134 void
1135 ttyresize(void) {
1136 struct winsize w;
1137
1138 w.ws_row = term.row;
1139 w.ws_col = term.col;
1140 w.ws_xpixel = xw.tw;
1141 w.ws_ypixel = xw.th;
1142 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1143 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1144 }
1145
1146 void
1147 tsetdirt(int top, int bot) {
1148 int i;
1149
1150 LIMIT(top, 0, term.row-1);
1151 LIMIT(bot, 0, term.row-1);
1152
1153 for(i = top; i <= bot; i++)
1154 term.dirty[i] = 1;
1155 }
1156
1157 void
1158 tfulldirt(void) {
1159 tsetdirt(0, term.row-1);
1160 }
1161
1162 void
1163 tcursor(int mode) {
1164 static TCursor c;
1165
1166 if(mode == CURSOR_SAVE) {
1167 c = term.c;
1168 } else if(mode == CURSOR_LOAD) {
1169 term.c = c;
1170 tmoveto(c.x, c.y);
1171 }
1172 }
1173
1174 void
1175 treset(void) {
1176 uint i;
1177
1178 term.c = (TCursor){{
1179 .mode = ATTR_NULL,
1180 .fg = defaultfg,
1181 .bg = defaultbg
1182 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1183
1184 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1185 for(i = tabspaces; i < term.col; i += tabspaces)
1186 term.tabs[i] = 1;
1187 term.top = 0;
1188 term.bot = term.row - 1;
1189 term.mode = MODE_WRAP;
1190
1191 tclearregion(0, 0, term.col-1, term.row-1);
1192 tmoveto(0, 0);
1193 tcursor(CURSOR_SAVE);
1194 }
1195
1196 void
1197 tnew(int col, int row) {
1198 memset(&term, 0, sizeof(Term));
1199 tresize(col, row);
1200 term.numlock = 1;
1201
1202 treset();
1203 }
1204
1205 void
1206 tswapscreen(void) {
1207 Line *tmp = term.line;
1208
1209 term.line = term.alt;
1210 term.alt = tmp;
1211 term.mode ^= MODE_ALTSCREEN;
1212 tfulldirt();
1213 }
1214
1215 void
1216 tscrolldown(int orig, int n) {
1217 int i;
1218 Line temp;
1219
1220 LIMIT(n, 0, term.bot-orig+1);
1221
1222 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1223
1224 for(i = term.bot; i >= orig+n; i--) {
1225 temp = term.line[i];
1226 term.line[i] = term.line[i-n];
1227 term.line[i-n] = temp;
1228
1229 term.dirty[i] = 1;
1230 term.dirty[i-n] = 1;
1231 }
1232
1233 selscroll(orig, n);
1234 }
1235
1236 void
1237 tscrollup(int orig, int n) {
1238 int i;
1239 Line temp;
1240 LIMIT(n, 0, term.bot-orig+1);
1241
1242 tclearregion(0, orig, term.col-1, orig+n-1);
1243
1244 for(i = orig; i <= term.bot-n; i++) {
1245 temp = term.line[i];
1246 term.line[i] = term.line[i+n];
1247 term.line[i+n] = temp;
1248
1249 term.dirty[i] = 1;
1250 term.dirty[i+n] = 1;
1251 }
1252
1253 selscroll(orig, -n);
1254 }
1255
1256 void
1257 selscroll(int orig, int n) {
1258 if(sel.bx == -1)
1259 return;
1260
1261 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1262 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1263 sel.bx = -1;
1264 return;
1265 }
1266 if(sel.type == SEL_RECTANGULAR) {
1267 if(sel.by < term.top)
1268 sel.by = term.top;
1269 if(sel.ey > term.bot)
1270 sel.ey = term.bot;
1271 } else {
1272 if(sel.by < term.top) {
1273 sel.by = term.top;
1274 sel.bx = 0;
1275 }
1276 if(sel.ey > term.bot) {
1277 sel.ey = term.bot;
1278 sel.ex = term.col;
1279 }
1280 }
1281 sel.b.y = sel.by, sel.b.x = sel.bx;
1282 sel.e.y = sel.ey, sel.e.x = sel.ex;
1283 }
1284 }
1285
1286 void
1287 tnewline(int first_col) {
1288 int y = term.c.y;
1289
1290 if(y == term.bot) {
1291 tscrollup(term.top, 1);
1292 } else {
1293 y++;
1294 }
1295 tmoveto(first_col ? 0 : term.c.x, y);
1296 }
1297
1298 void
1299 csiparse(void) {
1300 char *p = csiescseq.buf, *np;
1301 long int v;
1302
1303 csiescseq.narg = 0;
1304 if(*p == '?') {
1305 csiescseq.priv = 1;
1306 p++;
1307 }
1308
1309 csiescseq.buf[csiescseq.len] = '\0';
1310 while(p < csiescseq.buf+csiescseq.len) {
1311 np = NULL;
1312 v = strtol(p, &np, 10);
1313 if(np == p)
1314 v = 0;
1315 if(v == LONG_MAX || v == LONG_MIN)
1316 v = -1;
1317 csiescseq.arg[csiescseq.narg++] = v;
1318 p = np;
1319 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1320 break;
1321 p++;
1322 }
1323 csiescseq.mode = *p;
1324 }
1325
1326 /* for absolute user moves, when decom is set */
1327 void
1328 tmoveato(int x, int y) {
1329 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1330 }
1331
1332 void
1333 tmoveto(int x, int y) {
1334 int miny, maxy;
1335
1336 if(term.c.state & CURSOR_ORIGIN) {
1337 miny = term.top;
1338 maxy = term.bot;
1339 } else {
1340 miny = 0;
1341 maxy = term.row - 1;
1342 }
1343 LIMIT(x, 0, term.col-1);
1344 LIMIT(y, miny, maxy);
1345 term.c.state &= ~CURSOR_WRAPNEXT;
1346 term.c.x = x;
1347 term.c.y = y;
1348 }
1349
1350 void
1351 tsetchar(char *c, Glyph *attr, int x, int y) {
1352 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1353 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1354 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1355 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1356 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1357 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1358 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1359 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1360 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1361 };
1362
1363 /*
1364 * The table is proudly stolen from rxvt.
1365 */
1366 if(attr->mode & ATTR_GFX) {
1367 if(c[0] >= 0x41 && c[0] <= 0x7e
1368 && vt100_0[c[0] - 0x41]) {
1369 c = vt100_0[c[0] - 0x41];
1370 }
1371 }
1372
1373 term.dirty[y] = 1;
1374 term.line[y][x] = *attr;
1375 memcpy(term.line[y][x].c, c, UTF_SIZ);
1376 term.line[y][x].state |= GLYPH_SET;
1377 }
1378
1379 void
1380 tclearregion(int x1, int y1, int x2, int y2) {
1381 int x, y, temp;
1382
1383 if(x1 > x2)
1384 temp = x1, x1 = x2, x2 = temp;
1385 if(y1 > y2)
1386 temp = y1, y1 = y2, y2 = temp;
1387
1388 LIMIT(x1, 0, term.col-1);
1389 LIMIT(x2, 0, term.col-1);
1390 LIMIT(y1, 0, term.row-1);
1391 LIMIT(y2, 0, term.row-1);
1392
1393 for(y = y1; y <= y2; y++) {
1394 term.dirty[y] = 1;
1395 for(x = x1; x <= x2; x++) {
1396 term.line[y][x] = term.c.attr;
1397 memcpy(term.line[y][x].c, " ", 2);
1398 term.line[y][x].state |= GLYPH_SET;
1399 }
1400 }
1401 }
1402
1403 void
1404 tdeletechar(int n) {
1405 int src = term.c.x + n;
1406 int dst = term.c.x;
1407 int size = term.col - src;
1408
1409 term.dirty[term.c.y] = 1;
1410
1411 if(src >= term.col) {
1412 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1413 return;
1414 }
1415
1416 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1417 size * sizeof(Glyph));
1418 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1419 }
1420
1421 void
1422 tinsertblank(int n) {
1423 int src = term.c.x;
1424 int dst = src + n;
1425 int size = term.col - dst;
1426
1427 term.dirty[term.c.y] = 1;
1428
1429 if(dst >= term.col) {
1430 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1431 return;
1432 }
1433
1434 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1435 size * sizeof(Glyph));
1436 tclearregion(src, term.c.y, dst - 1, term.c.y);
1437 }
1438
1439 void
1440 tinsertblankline(int n) {
1441 if(term.c.y < term.top || term.c.y > term.bot)
1442 return;
1443
1444 tscrolldown(term.c.y, n);
1445 }
1446
1447 void
1448 tdeleteline(int n) {
1449 if(term.c.y < term.top || term.c.y > term.bot)
1450 return;
1451
1452 tscrollup(term.c.y, n);
1453 }
1454
1455 void
1456 tsetattr(int *attr, int l) {
1457 int i;
1458
1459 for(i = 0; i < l; i++) {
1460 switch(attr[i]) {
1461 case 0:
1462 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1463 | ATTR_BOLD | ATTR_ITALIC \
1464 | 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 if (!allowaltscreen)
1628 break;
1629
1630 alt = IS_SET(MODE_ALTSCREEN);
1631 if(alt) {
1632 tclearregion(0, 0, term.col-1,
1633 term.row-1);
1634 }
1635 if(set ^ alt) /* set is always 1 or 0 */
1636 tswapscreen();
1637 if(*args != 1049)
1638 break;
1639 /* FALLTRU */
1640 case 1048:
1641 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1642 break;
1643 default:
1644 fprintf(stderr,
1645 "erresc: unknown private set/reset mode %d\n",
1646 *args);
1647 break;
1648 }
1649 } else {
1650 switch(*args) {
1651 case 0: /* Error (IGNORED) */
1652 break;
1653 case 2: /* KAM -- keyboard action */
1654 MODBIT(term.mode, set, MODE_KBDLOCK);
1655 break;
1656 case 4: /* IRM -- Insertion-replacement */
1657 MODBIT(term.mode, set, MODE_INSERT);
1658 break;
1659 case 12: /* SRM -- Send/Receive */
1660 MODBIT(term.mode, !set, MODE_ECHO);
1661 break;
1662 case 20: /* LNM -- Linefeed/new line */
1663 MODBIT(term.mode, set, MODE_CRLF);
1664 break;
1665 default:
1666 fprintf(stderr,
1667 "erresc: unknown set/reset mode %d\n",
1668 *args);
1669 break;
1670 }
1671 }
1672 }
1673 }
1674 #undef MODBIT
1675
1676
1677 void
1678 csihandle(void) {
1679 switch(csiescseq.mode) {
1680 default:
1681 unknown:
1682 fprintf(stderr, "erresc: unknown csi ");
1683 csidump();
1684 /* die(""); */
1685 break;
1686 case '@': /* ICH -- Insert <n> blank char */
1687 DEFAULT(csiescseq.arg[0], 1);
1688 tinsertblank(csiescseq.arg[0]);
1689 break;
1690 case 'A': /* CUU -- Cursor <n> Up */
1691 DEFAULT(csiescseq.arg[0], 1);
1692 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1693 break;
1694 case 'B': /* CUD -- Cursor <n> Down */
1695 case 'e': /* VPR --Cursor <n> Down */
1696 DEFAULT(csiescseq.arg[0], 1);
1697 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1698 break;
1699 case 'c': /* DA -- Device Attributes */
1700 if(csiescseq.arg[0] == 0)
1701 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1702 break;
1703 case 'C': /* CUF -- Cursor <n> Forward */
1704 case 'a': /* HPR -- Cursor <n> Forward */
1705 DEFAULT(csiescseq.arg[0], 1);
1706 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1707 break;
1708 case 'D': /* CUB -- Cursor <n> Backward */
1709 DEFAULT(csiescseq.arg[0], 1);
1710 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1711 break;
1712 case 'E': /* CNL -- Cursor <n> Down and first col */
1713 DEFAULT(csiescseq.arg[0], 1);
1714 tmoveto(0, term.c.y+csiescseq.arg[0]);
1715 break;
1716 case 'F': /* CPL -- Cursor <n> Up and first col */
1717 DEFAULT(csiescseq.arg[0], 1);
1718 tmoveto(0, term.c.y-csiescseq.arg[0]);
1719 break;
1720 case 'g': /* TBC -- Tabulation clear */
1721 switch(csiescseq.arg[0]) {
1722 case 0: /* clear current tab stop */
1723 term.tabs[term.c.x] = 0;
1724 break;
1725 case 3: /* clear all the tabs */
1726 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1727 break;
1728 default:
1729 goto unknown;
1730 }
1731 break;
1732 case 'G': /* CHA -- Move to <col> */
1733 case '`': /* HPA */
1734 DEFAULT(csiescseq.arg[0], 1);
1735 tmoveto(csiescseq.arg[0]-1, term.c.y);
1736 break;
1737 case 'H': /* CUP -- Move to <row> <col> */
1738 case 'f': /* HVP */
1739 DEFAULT(csiescseq.arg[0], 1);
1740 DEFAULT(csiescseq.arg[1], 1);
1741 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1742 break;
1743 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1744 DEFAULT(csiescseq.arg[0], 1);
1745 while(csiescseq.arg[0]--)
1746 tputtab(1);
1747 break;
1748 case 'J': /* ED -- Clear screen */
1749 sel.bx = -1;
1750 switch(csiescseq.arg[0]) {
1751 case 0: /* below */
1752 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1753 if(term.c.y < term.row-1) {
1754 tclearregion(0, term.c.y+1, term.col-1,
1755 term.row-1);
1756 }
1757 break;
1758 case 1: /* above */
1759 if(term.c.y > 1)
1760 tclearregion(0, 0, term.col-1, term.c.y-1);
1761 tclearregion(0, term.c.y, term.c.x, term.c.y);
1762 break;
1763 case 2: /* all */
1764 tclearregion(0, 0, term.col-1, term.row-1);
1765 break;
1766 default:
1767 goto unknown;
1768 }
1769 break;
1770 case 'K': /* EL -- Clear line */
1771 switch(csiescseq.arg[0]) {
1772 case 0: /* right */
1773 tclearregion(term.c.x, term.c.y, term.col-1,
1774 term.c.y);
1775 break;
1776 case 1: /* left */
1777 tclearregion(0, term.c.y, term.c.x, term.c.y);
1778 break;
1779 case 2: /* all */
1780 tclearregion(0, term.c.y, term.col-1, term.c.y);
1781 break;
1782 }
1783 break;
1784 case 'S': /* SU -- Scroll <n> line up */
1785 DEFAULT(csiescseq.arg[0], 1);
1786 tscrollup(term.top, csiescseq.arg[0]);
1787 break;
1788 case 'T': /* SD -- Scroll <n> line down */
1789 DEFAULT(csiescseq.arg[0], 1);
1790 tscrolldown(term.top, csiescseq.arg[0]);
1791 break;
1792 case 'L': /* IL -- Insert <n> blank lines */
1793 DEFAULT(csiescseq.arg[0], 1);
1794 tinsertblankline(csiescseq.arg[0]);
1795 break;
1796 case 'l': /* RM -- Reset Mode */
1797 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1798 break;
1799 case 'M': /* DL -- Delete <n> lines */
1800 DEFAULT(csiescseq.arg[0], 1);
1801 tdeleteline(csiescseq.arg[0]);
1802 break;
1803 case 'X': /* ECH -- Erase <n> char */
1804 DEFAULT(csiescseq.arg[0], 1);
1805 tclearregion(term.c.x, term.c.y,
1806 term.c.x + csiescseq.arg[0] - 1, term.c.y);
1807 break;
1808 case 'P': /* DCH -- Delete <n> char */
1809 DEFAULT(csiescseq.arg[0], 1);
1810 tdeletechar(csiescseq.arg[0]);
1811 break;
1812 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1813 DEFAULT(csiescseq.arg[0], 1);
1814 while(csiescseq.arg[0]--)
1815 tputtab(0);
1816 break;
1817 case 'd': /* VPA -- Move to <row> */
1818 DEFAULT(csiescseq.arg[0], 1);
1819 tmoveato(term.c.x, csiescseq.arg[0]-1);
1820 break;
1821 case 'h': /* SM -- Set terminal mode */
1822 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1823 break;
1824 case 'm': /* SGR -- Terminal attribute (color) */
1825 tsetattr(csiescseq.arg, csiescseq.narg);
1826 break;
1827 case 'r': /* DECSTBM -- Set Scrolling Region */
1828 if(csiescseq.priv) {
1829 goto unknown;
1830 } else {
1831 DEFAULT(csiescseq.arg[0], 1);
1832 DEFAULT(csiescseq.arg[1], term.row);
1833 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1834 tmoveato(0, 0);
1835 }
1836 break;
1837 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1838 tcursor(CURSOR_SAVE);
1839 break;
1840 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1841 tcursor(CURSOR_LOAD);
1842 break;
1843 }
1844 }
1845
1846 void
1847 csidump(void) {
1848 int i;
1849 uint c;
1850
1851 printf("ESC[");
1852 for(i = 0; i < csiescseq.len; i++) {
1853 c = csiescseq.buf[i] & 0xff;
1854 if(isprint(c)) {
1855 putchar(c);
1856 } else if(c == '\n') {
1857 printf("(\\n)");
1858 } else if(c == '\r') {
1859 printf("(\\r)");
1860 } else if(c == 0x1b) {
1861 printf("(\\e)");
1862 } else {
1863 printf("(%02x)", c);
1864 }
1865 }
1866 putchar('\n');
1867 }
1868
1869 void
1870 csireset(void) {
1871 memset(&csiescseq, 0, sizeof(csiescseq));
1872 }
1873
1874 void
1875 strhandle(void) {
1876 char *p = NULL;
1877 int i, j, narg;
1878
1879 strparse();
1880 narg = strescseq.narg;
1881
1882 switch(strescseq.type) {
1883 case ']': /* OSC -- Operating System Command */
1884 switch(i = atoi(strescseq.args[0])) {
1885 case 0:
1886 case 1:
1887 case 2:
1888 if(narg > 1)
1889 xsettitle(strescseq.args[1]);
1890 break;
1891 case 4: /* color set */
1892 if(narg < 3)
1893 break;
1894 p = strescseq.args[2];
1895 /* fall through */
1896 case 104: /* color reset, here p = NULL */
1897 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
1898 if (!xsetcolorname(j, p)) {
1899 fprintf(stderr, "erresc: invalid color %s\n", p);
1900 } else {
1901 /*
1902 * TODO if defaultbg color is changed, borders
1903 * are dirty
1904 */
1905 redraw(0);
1906 }
1907 break;
1908 default:
1909 fprintf(stderr, "erresc: unknown str ");
1910 strdump();
1911 break;
1912 }
1913 break;
1914 case 'k': /* old title set compatibility */
1915 xsettitle(strescseq.args[0]);
1916 break;
1917 case 'P': /* DSC -- Device Control String */
1918 case '_': /* APC -- Application Program Command */
1919 case '^': /* PM -- Privacy Message */
1920 default:
1921 fprintf(stderr, "erresc: unknown str ");
1922 strdump();
1923 /* die(""); */
1924 break;
1925 }
1926 }
1927
1928 void
1929 strparse(void) {
1930 char *p = strescseq.buf;
1931
1932 strescseq.narg = 0;
1933 strescseq.buf[strescseq.len] = '\0';
1934 while(p && strescseq.narg < STR_ARG_SIZ)
1935 strescseq.args[strescseq.narg++] = strsep(&p, ";");
1936 }
1937
1938 void
1939 strdump(void) {
1940 int i;
1941 uint c;
1942
1943 printf("ESC%c", strescseq.type);
1944 for(i = 0; i < strescseq.len; i++) {
1945 c = strescseq.buf[i] & 0xff;
1946 if(c == '\0') {
1947 return;
1948 } else if(isprint(c)) {
1949 putchar(c);
1950 } else if(c == '\n') {
1951 printf("(\\n)");
1952 } else if(c == '\r') {
1953 printf("(\\r)");
1954 } else if(c == 0x1b) {
1955 printf("(\\e)");
1956 } else {
1957 printf("(%02x)", c);
1958 }
1959 }
1960 printf("ESC\\\n");
1961 }
1962
1963 void
1964 strreset(void) {
1965 memset(&strescseq, 0, sizeof(strescseq));
1966 }
1967
1968 void
1969 tputtab(bool forward) {
1970 uint x = term.c.x;
1971
1972 if(forward) {
1973 if(x == term.col)
1974 return;
1975 for(++x; x < term.col && !term.tabs[x]; ++x)
1976 /* nothing */ ;
1977 } else {
1978 if(x == 0)
1979 return;
1980 for(--x; x > 0 && !term.tabs[x]; --x)
1981 /* nothing */ ;
1982 }
1983 tmoveto(x, term.c.y);
1984 }
1985
1986 void
1987 techo(char *buf, int len) {
1988 for(; len > 0; buf++, len--) {
1989 char c = *buf;
1990
1991 if(c == '\033') { /* escape */
1992 tputc("^", 1);
1993 tputc("[", 1);
1994 } else if(c < '\x20') { /* control code */
1995 if(c != '\n' && c != '\r' && c != '\t') {
1996 c |= '\x40';
1997 tputc("^", 1);
1998 }
1999 tputc(&c, 1);
2000 } else {
2001 break;
2002 }
2003 }
2004 if(len)
2005 tputc(buf, len);
2006 }
2007
2008 void
2009 tputc(char *c, int len) {
2010 uchar ascii = *c;
2011 bool control = ascii < '\x20' || ascii == 0177;
2012
2013 if(iofd != -1) {
2014 if(xwrite(iofd, c, len) < 0) {
2015 fprintf(stderr, "Error writing in %s:%s\n",
2016 opt_io, strerror(errno));
2017 close(iofd);
2018 iofd = -1;
2019 }
2020 }
2021
2022 /*
2023 * STR sequences must be checked before anything else
2024 * because it can use some control codes as part of the sequence.
2025 */
2026 if(term.esc & ESC_STR) {
2027 switch(ascii) {
2028 case '\033':
2029 term.esc = ESC_START | ESC_STR_END;
2030 break;
2031 case '\a': /* backwards compatibility to xterm */
2032 term.esc = 0;
2033 strhandle();
2034 break;
2035 default:
2036 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2037 memmove(&strescseq.buf[strescseq.len], c, len);
2038 strescseq.len += len;
2039 } else {
2040 /*
2041 * Here is a bug in terminals. If the user never sends
2042 * some code to stop the str or esc command, then st
2043 * will stop responding. But this is better than
2044 * silently failing with unknown characters. At least
2045 * then users will report back.
2046 *
2047 * In the case users ever get fixed, here is the code:
2048 */
2049 /*
2050 * term.esc = 0;
2051 * strhandle();
2052 */
2053 }
2054 }
2055 return;
2056 }
2057
2058 /*
2059 * Actions of control codes must be performed as soon they arrive
2060 * because they can be embedded inside a control sequence, and
2061 * they must not cause conflicts with sequences.
2062 */
2063 if(control) {
2064 switch(ascii) {
2065 case '\t': /* HT */
2066 tputtab(1);
2067 return;
2068 case '\b': /* BS */
2069 tmoveto(term.c.x-1, term.c.y);
2070 return;
2071 case '\r': /* CR */
2072 tmoveto(0, term.c.y);
2073 return;
2074 case '\f': /* LF */
2075 case '\v': /* VT */
2076 case '\n': /* LF */
2077 /* go to first col if the mode is set */
2078 tnewline(IS_SET(MODE_CRLF));
2079 return;
2080 case '\a': /* BEL */
2081 if(!(xw.state & WIN_FOCUSED))
2082 xseturgency(1);
2083 return;
2084 case '\033': /* ESC */
2085 csireset();
2086 term.esc = ESC_START;
2087 return;
2088 case '\016': /* SO */
2089 case '\017': /* SI */
2090 /*
2091 * Different charsets are hard to handle. Applications
2092 * should use the right alt charset escapes for the
2093 * only reason they still exist: line drawing. The
2094 * rest is incompatible history st should not support.
2095 */
2096 return;
2097 case '\032': /* SUB */
2098 case '\030': /* CAN */
2099 csireset();
2100 return;
2101 case '\005': /* ENQ (IGNORED) */
2102 case '\000': /* NUL (IGNORED) */
2103 case '\021': /* XON (IGNORED) */
2104 case '\023': /* XOFF (IGNORED) */
2105 case 0177: /* DEL (IGNORED) */
2106 return;
2107 }
2108 } else if(term.esc & ESC_START) {
2109 if(term.esc & ESC_CSI) {
2110 csiescseq.buf[csiescseq.len++] = ascii;
2111 if(BETWEEN(ascii, 0x40, 0x7E)
2112 || csiescseq.len >= \
2113 sizeof(csiescseq.buf)-1) {
2114 term.esc = 0;
2115 csiparse();
2116 csihandle();
2117 }
2118 } else if(term.esc & ESC_STR_END) {
2119 term.esc = 0;
2120 if(ascii == '\\')
2121 strhandle();
2122 } else if(term.esc & ESC_ALTCHARSET) {
2123 switch(ascii) {
2124 case '0': /* Line drawing set */
2125 term.c.attr.mode |= ATTR_GFX;
2126 break;
2127 case 'B': /* USASCII */
2128 term.c.attr.mode &= ~ATTR_GFX;
2129 break;
2130 case 'A': /* UK (IGNORED) */
2131 case '<': /* multinational charset (IGNORED) */
2132 case '5': /* Finnish (IGNORED) */
2133 case 'C': /* Finnish (IGNORED) */
2134 case 'K': /* German (IGNORED) */
2135 break;
2136 default:
2137 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2138 }
2139 term.esc = 0;
2140 } else if(term.esc & ESC_TEST) {
2141 if(ascii == '8') { /* DEC screen alignment test. */
2142 char E[UTF_SIZ] = "E";
2143 int x, y;
2144
2145 for(x = 0; x < term.col; ++x) {
2146 for(y = 0; y < term.row; ++y)
2147 tsetchar(E, &term.c.attr, x, y);
2148 }
2149 }
2150 term.esc = 0;
2151 } else {
2152 switch(ascii) {
2153 case '[':
2154 term.esc |= ESC_CSI;
2155 break;
2156 case '#':
2157 term.esc |= ESC_TEST;
2158 break;
2159 case 'P': /* DCS -- Device Control String */
2160 case '_': /* APC -- Application Program Command */
2161 case '^': /* PM -- Privacy Message */
2162 case ']': /* OSC -- Operating System Command */
2163 case 'k': /* old title set compatibility */
2164 strreset();
2165 strescseq.type = ascii;
2166 term.esc |= ESC_STR;
2167 break;
2168 case '(': /* set primary charset G0 */
2169 term.esc |= ESC_ALTCHARSET;
2170 break;
2171 case ')': /* set secondary charset G1 (IGNORED) */
2172 case '*': /* set tertiary charset G2 (IGNORED) */
2173 case '+': /* set quaternary charset G3 (IGNORED) */
2174 term.esc = 0;
2175 break;
2176 case 'D': /* IND -- Linefeed */
2177 if(term.c.y == term.bot) {
2178 tscrollup(term.top, 1);
2179 } else {
2180 tmoveto(term.c.x, term.c.y+1);
2181 }
2182 term.esc = 0;
2183 break;
2184 case 'E': /* NEL -- Next line */
2185 tnewline(1); /* always go to first col */
2186 term.esc = 0;
2187 break;
2188 case 'H': /* HTS -- Horizontal tab stop */
2189 term.tabs[term.c.x] = 1;
2190 term.esc = 0;
2191 break;
2192 case 'M': /* RI -- Reverse index */
2193 if(term.c.y == term.top) {
2194 tscrolldown(term.top, 1);
2195 } else {
2196 tmoveto(term.c.x, term.c.y-1);
2197 }
2198 term.esc = 0;
2199 break;
2200 case 'Z': /* DECID -- Identify Terminal */
2201 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2202 term.esc = 0;
2203 break;
2204 case 'c': /* RIS -- Reset to inital state */
2205 treset();
2206 term.esc = 0;
2207 xresettitle();
2208 break;
2209 case '=': /* DECPAM -- Application keypad */
2210 term.mode |= MODE_APPKEYPAD;
2211 term.esc = 0;
2212 break;
2213 case '>': /* DECPNM -- Normal keypad */
2214 term.mode &= ~MODE_APPKEYPAD;
2215 term.esc = 0;
2216 break;
2217 case '7': /* DECSC -- Save Cursor */
2218 tcursor(CURSOR_SAVE);
2219 term.esc = 0;
2220 break;
2221 case '8': /* DECRC -- Restore Cursor */
2222 tcursor(CURSOR_LOAD);
2223 term.esc = 0;
2224 break;
2225 case '\\': /* ST -- Stop */
2226 term.esc = 0;
2227 break;
2228 default:
2229 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2230 (uchar) ascii, isprint(ascii)? ascii:'.');
2231 term.esc = 0;
2232 }
2233 }
2234 /*
2235 * All characters which form part of a sequence are not
2236 * printed
2237 */
2238 return;
2239 }
2240 /*
2241 * Display control codes only if we are in graphic mode
2242 */
2243 if(control && !(term.c.attr.mode & ATTR_GFX))
2244 return;
2245 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2246 sel.bx = -1;
2247 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2248 tnewline(1); /* always go to first col */
2249
2250 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2251 memmove(&term.line[term.c.y][term.c.x+1],
2252 &term.line[term.c.y][term.c.x],
2253 (term.col - term.c.x - 1) * sizeof(Glyph));
2254 }
2255
2256 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2257 if(term.c.x+1 < term.col) {
2258 tmoveto(term.c.x+1, term.c.y);
2259 } else {
2260 term.c.state |= CURSOR_WRAPNEXT;
2261 }
2262 }
2263
2264 int
2265 tresize(int col, int row) {
2266 int i, x;
2267 int minrow = MIN(row, term.row);
2268 int mincol = MIN(col, term.col);
2269 int slide = term.c.y - row + 1;
2270 bool *bp;
2271
2272 if(col < 1 || row < 1)
2273 return 0;
2274
2275 /* free unneeded rows */
2276 i = 0;
2277 if(slide > 0) {
2278 /*
2279 * slide screen to keep cursor where we expect it -
2280 * tscrollup would work here, but we can optimize to
2281 * memmove because we're freeing the earlier lines
2282 */
2283 for(/* i = 0 */; i < slide; i++) {
2284 free(term.line[i]);
2285 free(term.alt[i]);
2286 }
2287 memmove(term.line, term.line + slide, row * sizeof(Line));
2288 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2289 }
2290 for(i += row; i < term.row; i++) {
2291 free(term.line[i]);
2292 free(term.alt[i]);
2293 }
2294
2295 /* resize to new height */
2296 term.line = xrealloc(term.line, row * sizeof(Line));
2297 term.alt = xrealloc(term.alt, row * sizeof(Line));
2298 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2299 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2300
2301 /* resize each row to new width, zero-pad if needed */
2302 for(i = 0; i < minrow; i++) {
2303 term.dirty[i] = 1;
2304 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2305 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2306 for(x = mincol; x < col; x++) {
2307 term.line[i][x].state = 0;
2308 term.alt[i][x].state = 0;
2309 }
2310 }
2311
2312 /* allocate any new rows */
2313 for(/* i == minrow */; i < row; i++) {
2314 term.dirty[i] = 1;
2315 term.line[i] = xcalloc(col, sizeof(Glyph));
2316 term.alt [i] = xcalloc(col, sizeof(Glyph));
2317 }
2318 if(col > term.col) {
2319 bp = term.tabs + term.col;
2320
2321 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2322 while(--bp > term.tabs && !*bp)
2323 /* nothing */ ;
2324 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2325 *bp = 1;
2326 }
2327 /* update terminal size */
2328 term.col = col;
2329 term.row = row;
2330 /* reset scrolling region */
2331 tsetscroll(0, row-1);
2332 /* make use of the LIMIT in tmoveto */
2333 tmoveto(term.c.x, term.c.y);
2334
2335 return (slide > 0);
2336 }
2337
2338 void
2339 xresize(int col, int row) {
2340 xw.tw = MAX(1, col * xw.cw);
2341 xw.th = MAX(1, row * xw.ch);
2342
2343 XFreePixmap(xw.dpy, xw.buf);
2344 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2345 DefaultDepth(xw.dpy, xw.scr));
2346 XftDrawChange(xw.draw, xw.buf);
2347 xclear(0, 0, xw.w, xw.h);
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, *bg, *temp, revfg, revbg;
2723 XRenderColor colfg, colbg;
2724
2725 frcflags = FRC_NORMAL;
2726
2727 if(base.mode & ATTR_ITALIC) {
2728 if(base.fg == defaultfg)
2729 base.fg = defaultitalic;
2730 font = &dc.ifont;
2731 frcflags = FRC_ITALIC;
2732 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2733 if(base.fg == defaultfg)
2734 base.fg = defaultitalic;
2735 font = &dc.ibfont;
2736 frcflags = FRC_ITALICBOLD;
2737 } else if(base.mode & ATTR_UNDERLINE) {
2738 if(base.fg == defaultfg)
2739 base.fg = defaultunderline;
2740 }
2741 fg = &dc.col[base.fg];
2742 bg = &dc.col[base.bg];
2743
2744 if(base.mode & ATTR_BOLD) {
2745 if(BETWEEN(base.fg, 0, 7)) {
2746 /* basic system colors */
2747 fg = &dc.col[base.fg + 8];
2748 } else if(BETWEEN(base.fg, 16, 195)) {
2749 /* 256 colors */
2750 fg = &dc.col[base.fg + 36];
2751 } else if(BETWEEN(base.fg, 232, 251)) {
2752 /* greyscale */
2753 fg = &dc.col[base.fg + 4];
2754 }
2755 /*
2756 * Those ranges will not be brightened:
2757 * 8 - 15 – bright system colors
2758 * 196 - 231 – highest 256 color cube
2759 * 252 - 255 – brightest colors in greyscale
2760 */
2761 font = &dc.bfont;
2762 frcflags = FRC_BOLD;
2763 }
2764
2765 if(IS_SET(MODE_REVERSE)) {
2766 if(fg == &dc.col[defaultfg]) {
2767 fg = &dc.col[defaultbg];
2768 } else {
2769 colfg.red = ~fg->color.red;
2770 colfg.green = ~fg->color.green;
2771 colfg.blue = ~fg->color.blue;
2772 colfg.alpha = fg->color.alpha;
2773 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2774 fg = &revfg;
2775 }
2776
2777 if(bg == &dc.col[defaultbg]) {
2778 bg = &dc.col[defaultfg];
2779 } else {
2780 colbg.red = ~bg->color.red;
2781 colbg.green = ~bg->color.green;
2782 colbg.blue = ~bg->color.blue;
2783 colbg.alpha = bg->color.alpha;
2784 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2785 bg = &revbg;
2786 }
2787 }
2788
2789 if(base.mode & ATTR_REVERSE) {
2790 temp = fg;
2791 fg = bg;
2792 bg = temp;
2793 }
2794
2795 /* Intelligent cleaning up of the borders. */
2796 if(x == 0) {
2797 xclear(0, (y == 0)? 0 : winy, borderpx,
2798 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2799 }
2800 if(x + charlen >= term.col) {
2801 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2802 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2803 }
2804 if(y == 0)
2805 xclear(winx, 0, winx + width, borderpx);
2806 if(y == term.row-1)
2807 xclear(winx, winy + xw.ch, winx + width, xw.h);
2808
2809 /* Clean up the region we want to draw to. */
2810 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2811
2812 fcsets[0] = font->set;
2813 for(xp = winx; bytelen > 0;) {
2814 /*
2815 * Search for the range in the to be printed string of glyphs
2816 * that are in the main font. Then print that range. If
2817 * some glyph is found that is not in the font, do the
2818 * fallback dance.
2819 */
2820 u8fs = s;
2821 u8fblen = 0;
2822 u8fl = 0;
2823 for(;;) {
2824 u8c = s;
2825 u8cblen = utf8decode(s, &u8char);
2826 s += u8cblen;
2827 bytelen -= u8cblen;
2828
2829 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
2830 if(!doesexist || bytelen <= 0) {
2831 if(bytelen <= 0) {
2832 if(doesexist) {
2833 u8fl++;
2834 u8fblen += u8cblen;
2835 }
2836 }
2837
2838 if(u8fl > 0) {
2839 XftDrawStringUtf8(xw.draw, fg,
2840 font->match, xp,
2841 winy + font->ascent,
2842 (FcChar8 *)u8fs,
2843 u8fblen);
2844 xp += font->width * u8fl;
2845 }
2846 break;
2847 }
2848
2849 u8fl++;
2850 u8fblen += u8cblen;
2851 }
2852 if(doesexist)
2853 break;
2854
2855 frp = frccur;
2856 /* Search the font cache. */
2857 for(i = 0; i < frclen; i++, frp--) {
2858 if(frp <= 0)
2859 frp = LEN(frc) - 1;
2860
2861 if(frc[frp].c == u8char
2862 && frc[frp].flags == frcflags) {
2863 break;
2864 }
2865 }
2866
2867 /* Nothing was found. */
2868 if(i >= frclen) {
2869 /*
2870 * Nothing was found in the cache. Now use
2871 * some dozen of Fontconfig calls to get the
2872 * font for one single character.
2873 */
2874 fcpattern = FcPatternDuplicate(font->pattern);
2875 fccharset = FcCharSetCreate();
2876
2877 FcCharSetAddChar(fccharset, u8char);
2878 FcPatternAddCharSet(fcpattern, FC_CHARSET,
2879 fccharset);
2880 FcPatternAddBool(fcpattern, FC_SCALABLE,
2881 FcTrue);
2882
2883 FcConfigSubstitute(0, fcpattern,
2884 FcMatchPattern);
2885 FcDefaultSubstitute(fcpattern);
2886
2887 fontpattern = FcFontSetMatch(0, fcsets,
2888 FcTrue, fcpattern, &fcres);
2889
2890 /*
2891 * Overwrite or create the new cache entry.
2892 */
2893 frccur++;
2894 frclen++;
2895 if(frccur >= LEN(frc))
2896 frccur = 0;
2897 if(frclen > LEN(frc)) {
2898 frclen = LEN(frc);
2899 XftFontClose(xw.dpy, frc[frccur].font);
2900 }
2901
2902 frc[frccur].font = XftFontOpenPattern(xw.dpy,
2903 fontpattern);
2904 frc[frccur].c = u8char;
2905 frc[frccur].flags = frcflags;
2906
2907 FcPatternDestroy(fcpattern);
2908 FcCharSetDestroy(fccharset);
2909
2910 frp = frccur;
2911 }
2912
2913 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
2914 xp, winy + frc[frp].font->ascent,
2915 (FcChar8 *)u8c, u8cblen);
2916
2917 xp += font->width;
2918 }
2919
2920 /*
2921 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
2922 winy + font->ascent, (FcChar8 *)s, bytelen);
2923 */
2924
2925 if(base.mode & ATTR_UNDERLINE) {
2926 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
2927 width, 1);
2928 }
2929 }
2930
2931 void
2932 xdrawcursor(void) {
2933 static int oldx = 0, oldy = 0;
2934 int sl;
2935 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs, 0};
2936
2937 LIMIT(oldx, 0, term.col-1);
2938 LIMIT(oldy, 0, term.row-1);
2939
2940 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2941 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2942
2943 /* remove the old cursor */
2944 if(term.line[oldy][oldx].state & GLYPH_SET) {
2945 sl = utf8size(term.line[oldy][oldx].c);
2946 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2947 oldy, 1, sl);
2948 } else {
2949 xtermclear(oldx, oldy, oldx, oldy);
2950 }
2951
2952 /* draw the new one */
2953 if(!(IS_SET(MODE_HIDE))) {
2954 if(xw.state & WIN_FOCUSED) {
2955 if(IS_SET(MODE_REVERSE)) {
2956 g.mode |= ATTR_REVERSE;
2957 g.fg = defaultcs;
2958 g.bg = defaultfg;
2959 }
2960
2961 sl = utf8size(g.c);
2962 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2963 } else {
2964 XftDrawRect(xw.draw, &dc.col[defaultcs],
2965 borderpx + term.c.x * xw.cw,
2966 borderpx + term.c.y * xw.ch,
2967 xw.cw - 1, 1);
2968 XftDrawRect(xw.draw, &dc.col[defaultcs],
2969 borderpx + term.c.x * xw.cw,
2970 borderpx + term.c.y * xw.ch,
2971 1, xw.ch - 1);
2972 XftDrawRect(xw.draw, &dc.col[defaultcs],
2973 borderpx + (term.c.x + 1) * xw.cw - 1,
2974 borderpx + term.c.y * xw.ch,
2975 1, xw.ch - 1);
2976 XftDrawRect(xw.draw, &dc.col[defaultcs],
2977 borderpx + term.c.x * xw.cw,
2978 borderpx + (term.c.y + 1) * xw.ch - 1,
2979 xw.cw, 1);
2980 }
2981 oldx = term.c.x, oldy = term.c.y;
2982 }
2983 }
2984
2985
2986 void
2987 xsettitle(char *p) {
2988 XTextProperty prop;
2989
2990 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
2991 &prop);
2992 XSetWMName(xw.dpy, xw.win, &prop);
2993 }
2994
2995 void
2996 xresettitle(void) {
2997 xsettitle(opt_title ? opt_title : "st");
2998 }
2999
3000 void
3001 redraw(int timeout) {
3002 struct timespec tv = {0, timeout * 1000};
3003
3004 tfulldirt();
3005 draw();
3006
3007 if(timeout > 0) {
3008 nanosleep(&tv, NULL);
3009 XSync(xw.dpy, False); /* necessary for a good tput flash */
3010 }
3011 }
3012
3013 void
3014 draw(void) {
3015 drawregion(0, 0, term.col, term.row);
3016 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3017 xw.h, 0, 0);
3018 XSetForeground(xw.dpy, dc.gc,
3019 dc.col[IS_SET(MODE_REVERSE)?
3020 defaultfg : defaultbg].pixel);
3021 }
3022
3023 void
3024 drawregion(int x1, int y1, int x2, int y2) {
3025 int ic, ib, x, y, ox, sl;
3026 Glyph base, new;
3027 char buf[DRAW_BUF_SIZ];
3028 bool ena_sel = sel.bx != -1;
3029
3030 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3031 ena_sel = 0;
3032
3033 if(!(xw.state & WIN_VISIBLE))
3034 return;
3035
3036 for(y = y1; y < y2; y++) {
3037 if(!term.dirty[y])
3038 continue;
3039
3040 xtermclear(0, y, term.col, y);
3041 term.dirty[y] = 0;
3042 base = term.line[y][0];
3043 ic = ib = ox = 0;
3044 for(x = x1; x < x2; x++) {
3045 new = term.line[y][x];
3046 if(ena_sel && *(new.c) && selected(x, y))
3047 new.mode ^= ATTR_REVERSE;
3048 if(ib > 0 && (!(new.state & GLYPH_SET)
3049 || ATTRCMP(base, new)
3050 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3051 xdraws(buf, base, ox, y, ic, ib);
3052 ic = ib = 0;
3053 }
3054 if(new.state & GLYPH_SET) {
3055 if(ib == 0) {
3056 ox = x;
3057 base = new;
3058 }
3059
3060 sl = utf8size(new.c);
3061 memcpy(buf+ib, new.c, sl);
3062 ib += sl;
3063 ++ic;
3064 }
3065 }
3066 if(ib > 0)
3067 xdraws(buf, base, ox, y, ic, ib);
3068 }
3069 xdrawcursor();
3070 }
3071
3072 void
3073 expose(XEvent *ev) {
3074 XExposeEvent *e = &ev->xexpose;
3075
3076 if(xw.state & WIN_REDRAW) {
3077 if(!e->count)
3078 xw.state &= ~WIN_REDRAW;
3079 }
3080 redraw(0);
3081 }
3082
3083 void
3084 visibility(XEvent *ev) {
3085 XVisibilityEvent *e = &ev->xvisibility;
3086
3087 if(e->state == VisibilityFullyObscured) {
3088 xw.state &= ~WIN_VISIBLE;
3089 } else if(!(xw.state & WIN_VISIBLE)) {
3090 /* need a full redraw for next Expose, not just a buf copy */
3091 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3092 }
3093 }
3094
3095 void
3096 unmap(XEvent *ev) {
3097 xw.state &= ~WIN_VISIBLE;
3098 }
3099
3100 void
3101 xseturgency(int add) {
3102 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3103
3104 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3105 XSetWMHints(xw.dpy, xw.win, h);
3106 XFree(h);
3107 }
3108
3109 void
3110 focus(XEvent *ev) {
3111 XFocusChangeEvent *e = &ev->xfocus;
3112
3113 if(e->mode == NotifyGrab)
3114 return;
3115
3116 if(ev->type == FocusIn) {
3117 XSetICFocus(xw.xic);
3118 xw.state |= WIN_FOCUSED;
3119 xseturgency(0);
3120 } else {
3121 XUnsetICFocus(xw.xic);
3122 xw.state &= ~WIN_FOCUSED;
3123 }
3124 }
3125
3126 inline bool
3127 match(uint mask, uint state) {
3128 state &= ~(ignoremod);
3129
3130 if(mask == XK_NO_MOD && state)
3131 return false;
3132 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3133 return false;
3134 if((state & mask) != state)
3135 return false;
3136 return true;
3137 }
3138
3139 void
3140 numlock(const Arg *dummy) {
3141 term.numlock ^= 1;
3142 }
3143
3144 char*
3145 kmap(KeySym k, uint state) {
3146 uint mask;
3147 Key *kp;
3148 int i;
3149
3150 /* Check for mapped keys out of X11 function keys. */
3151 for(i = 0; i < LEN(mappedkeys); i++) {
3152 if(mappedkeys[i] == k)
3153 break;
3154 }
3155 if(i == LEN(mappedkeys)) {
3156 if((k & 0xFFFF) < 0xFD00)
3157 return NULL;
3158 }
3159
3160 for(kp = key; kp < key + LEN(key); kp++) {
3161 mask = kp->mask;
3162
3163 if(kp->k != k)
3164 continue;
3165
3166 if(!match(mask, state))
3167 continue;
3168
3169 if(kp->appkey > 0) {
3170 if(!IS_SET(MODE_APPKEYPAD))
3171 continue;
3172 if(term.numlock && kp->appkey == 2)
3173 continue;
3174 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3175 continue;
3176 }
3177
3178 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3179 (kp->appcursor > 0
3180 && !IS_SET(MODE_APPCURSOR))) {
3181 continue;
3182 }
3183
3184 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3185 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3186 continue;
3187 }
3188
3189 return kp->s;
3190 }
3191
3192 return NULL;
3193 }
3194
3195 void
3196 kpress(XEvent *ev) {
3197 XKeyEvent *e = &ev->xkey;
3198 KeySym ksym;
3199 char xstr[31], buf[32], *customkey, *cp = buf;
3200 int len;
3201 Status status;
3202 Shortcut *bp;
3203
3204 if(IS_SET(MODE_KBDLOCK))
3205 return;
3206
3207 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3208 e->state &= ~Mod2Mask;
3209 /* 1. shortcuts */
3210 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3211 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3212 bp->func(&(bp->arg));
3213 return;
3214 }
3215 }
3216
3217 /* 2. custom keys from config.h */
3218 if((customkey = kmap(ksym, e->state))) {
3219 len = strlen(customkey);
3220 memcpy(buf, customkey, len);
3221 /* 2. hardcoded (overrides X lookup) */
3222 } else {
3223 if(len == 0)
3224 return;
3225
3226 if(len == 1 && e->state & Mod1Mask)
3227 *cp++ = '\033';
3228
3229 memcpy(cp, xstr, len);
3230 len = cp - buf + len;
3231 }
3232
3233 ttywrite(buf, len);
3234 if(IS_SET(MODE_ECHO))
3235 techo(buf, len);
3236 }
3237
3238
3239 void
3240 cmessage(XEvent *e) {
3241 /*
3242 * See xembed specs
3243 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3244 */
3245 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3246 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3247 xw.state |= WIN_FOCUSED;
3248 xseturgency(0);
3249 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3250 xw.state &= ~WIN_FOCUSED;
3251 }
3252 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3253 /* Send SIGHUP to shell */
3254 kill(pid, SIGHUP);
3255 exit(EXIT_SUCCESS);
3256 }
3257 }
3258
3259 void
3260 cresize(int width, int height) {
3261 int col, row;
3262
3263 if(width != 0)
3264 xw.w = width;
3265 if(height != 0)
3266 xw.h = height;
3267
3268 col = (xw.w - 2 * borderpx) / xw.cw;
3269 row = (xw.h - 2 * borderpx) / xw.ch;
3270
3271 tresize(col, row);
3272 xresize(col, row);
3273 ttyresize();
3274 }
3275
3276 void
3277 resize(XEvent *e) {
3278 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3279 return;
3280
3281 cresize(e->xconfigure.width, e->xconfigure.height);
3282 }
3283
3284 void
3285 run(void) {
3286 XEvent ev;
3287 fd_set rfd;
3288 int xfd = XConnectionNumber(xw.dpy), xev;
3289 struct timeval drawtimeout, *tv = NULL, now, last;
3290
3291 gettimeofday(&last, NULL);
3292
3293 for(xev = actionfps;;) {
3294 FD_ZERO(&rfd);
3295 FD_SET(cmdfd, &rfd);
3296 FD_SET(xfd, &rfd);
3297 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3298 if(errno == EINTR)
3299 continue;
3300 die("select failed: %s\n", SERRNO);
3301 }
3302
3303 gettimeofday(&now, NULL);
3304 drawtimeout.tv_sec = 0;
3305 drawtimeout.tv_usec = (1000/xfps) * 1000;
3306 tv = &drawtimeout;
3307
3308 if(FD_ISSET(cmdfd, &rfd))
3309 ttyread();
3310
3311 if(FD_ISSET(xfd, &rfd))
3312 xev = actionfps;
3313
3314 if(TIMEDIFF(now, last) > \
3315 (xev ? (1000/xfps) : (1000/actionfps))) {
3316 while(XPending(xw.dpy)) {
3317 XNextEvent(xw.dpy, &ev);
3318 if(XFilterEvent(&ev, None))
3319 continue;
3320 if(handler[ev.type])
3321 (handler[ev.type])(&ev);
3322 }
3323
3324 draw();
3325 XFlush(xw.dpy);
3326 last = now;
3327
3328 if(xev && !FD_ISSET(xfd, &rfd))
3329 xev--;
3330 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd))
3331 tv = NULL;
3332 }
3333 }
3334 }
3335
3336 void
3337 usage(void) {
3338 die("%s " VERSION " (c) 2010-2013 st engineers\n" \
3339 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3340 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3341 }
3342
3343 int
3344 main(int argc, char *argv[]) {
3345 int bitm, xr, yr;
3346 uint wr, hr;
3347
3348 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3349 xw.isfixed = False;
3350
3351 ARGBEGIN {
3352 case 'a':
3353 allowaltscreen = false;
3354 break;
3355 case 'c':
3356 opt_class = EARGF(usage());
3357 break;
3358 case 'e':
3359 /* eat all remaining arguments */
3360 if(argc > 1)
3361 opt_cmd = &argv[1];
3362 goto run;
3363 case 'f':
3364 opt_font = EARGF(usage());
3365 break;
3366 case 'g':
3367 bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
3368 if(bitm & XValue)
3369 xw.fx = xr;
3370 if(bitm & YValue)
3371 xw.fy = yr;
3372 if(bitm & WidthValue)
3373 xw.fw = (int)wr;
3374 if(bitm & HeightValue)
3375 xw.fh = (int)hr;
3376 if(bitm & XNegative && xw.fx == 0)
3377 xw.fx = -1;
3378 if(bitm & XNegative && xw.fy == 0)
3379 xw.fy = -1;
3380
3381 if(xw.fh != 0 && xw.fw != 0)
3382 xw.isfixed = True;
3383 break;
3384 case 'o':
3385 opt_io = EARGF(usage());
3386 break;
3387 case 't':
3388 opt_title = EARGF(usage());
3389 break;
3390 case 'w':
3391 opt_embed = EARGF(usage());
3392 break;
3393 case 'v':
3394 default:
3395 usage();
3396 } ARGEND;
3397
3398 run:
3399 setlocale(LC_CTYPE, "");
3400 XSetLocaleModifiers("");
3401 tnew(80, 24);
3402 xinit();
3403 ttynew();
3404 selinit();
3405 if(xw.isfixed)
3406 cresize(xw.h, xw.w);
3407 run();
3408
3409 return 0;
3410 }
3411