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56dc94c611b9016a9ad5852d2ebecabe1e6feb37
[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 /* set screen size */
1199 term.row = row;
1200 term.col = col;
1201 term.line = xmalloc(term.row * sizeof(Line));
1202 term.alt = xmalloc(term.row * sizeof(Line));
1203 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
1204 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
1205
1206 for(row = 0; row < term.row; row++) {
1207 term.line[row] = xmalloc(term.col * sizeof(Glyph));
1208 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
1209 term.dirty[row] = 0;
1210 }
1211
1212 term.numlock = 1;
1213 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1214 /* setup screen */
1215 treset();
1216 }
1217
1218 void
1219 tswapscreen(void) {
1220 Line *tmp = term.line;
1221
1222 term.line = term.alt;
1223 term.alt = tmp;
1224 term.mode ^= MODE_ALTSCREEN;
1225 tfulldirt();
1226 }
1227
1228 void
1229 tscrolldown(int orig, int n) {
1230 int i;
1231 Line temp;
1232
1233 LIMIT(n, 0, term.bot-orig+1);
1234
1235 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1236
1237 for(i = term.bot; i >= orig+n; i--) {
1238 temp = term.line[i];
1239 term.line[i] = term.line[i-n];
1240 term.line[i-n] = temp;
1241
1242 term.dirty[i] = 1;
1243 term.dirty[i-n] = 1;
1244 }
1245
1246 selscroll(orig, n);
1247 }
1248
1249 void
1250 tscrollup(int orig, int n) {
1251 int i;
1252 Line temp;
1253 LIMIT(n, 0, term.bot-orig+1);
1254
1255 tclearregion(0, orig, term.col-1, orig+n-1);
1256
1257 for(i = orig; i <= term.bot-n; i++) {
1258 temp = term.line[i];
1259 term.line[i] = term.line[i+n];
1260 term.line[i+n] = temp;
1261
1262 term.dirty[i] = 1;
1263 term.dirty[i+n] = 1;
1264 }
1265
1266 selscroll(orig, -n);
1267 }
1268
1269 void
1270 selscroll(int orig, int n) {
1271 if(sel.bx == -1)
1272 return;
1273
1274 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1275 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1276 sel.bx = -1;
1277 return;
1278 }
1279 if(sel.type == SEL_RECTANGULAR) {
1280 if(sel.by < term.top)
1281 sel.by = term.top;
1282 if(sel.ey > term.bot)
1283 sel.ey = term.bot;
1284 } else {
1285 if(sel.by < term.top) {
1286 sel.by = term.top;
1287 sel.bx = 0;
1288 }
1289 if(sel.ey > term.bot) {
1290 sel.ey = term.bot;
1291 sel.ex = term.col;
1292 }
1293 }
1294 sel.b.y = sel.by, sel.b.x = sel.bx;
1295 sel.e.y = sel.ey, sel.e.x = sel.ex;
1296 }
1297 }
1298
1299 void
1300 tnewline(int first_col) {
1301 int y = term.c.y;
1302
1303 if(y == term.bot) {
1304 tscrollup(term.top, 1);
1305 } else {
1306 y++;
1307 }
1308 tmoveto(first_col ? 0 : term.c.x, y);
1309 }
1310
1311 void
1312 csiparse(void) {
1313 char *p = csiescseq.buf, *np;
1314 long int v;
1315
1316 csiescseq.narg = 0;
1317 if(*p == '?') {
1318 csiescseq.priv = 1;
1319 p++;
1320 }
1321
1322 csiescseq.buf[csiescseq.len] = '\0';
1323 while(p < csiescseq.buf+csiescseq.len) {
1324 np = NULL;
1325 v = strtol(p, &np, 10);
1326 if(np == p)
1327 v = 0;
1328 if(v == LONG_MAX || v == LONG_MIN)
1329 v = -1;
1330 csiescseq.arg[csiescseq.narg++] = v;
1331 p = np;
1332 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1333 break;
1334 p++;
1335 }
1336 csiescseq.mode = *p;
1337 }
1338
1339 /* for absolute user moves, when decom is set */
1340 void
1341 tmoveato(int x, int y) {
1342 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1343 }
1344
1345 void
1346 tmoveto(int x, int y) {
1347 int miny, maxy;
1348
1349 if(term.c.state & CURSOR_ORIGIN) {
1350 miny = term.top;
1351 maxy = term.bot;
1352 } else {
1353 miny = 0;
1354 maxy = term.row - 1;
1355 }
1356 LIMIT(x, 0, term.col-1);
1357 LIMIT(y, miny, maxy);
1358 term.c.state &= ~CURSOR_WRAPNEXT;
1359 term.c.x = x;
1360 term.c.y = y;
1361 }
1362
1363 void
1364 tsetchar(char *c, Glyph *attr, int x, int y) {
1365 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1366 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1367 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1368 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1369 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1370 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1371 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1372 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1373 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1374 };
1375
1376 /*
1377 * The table is proudly stolen from rxvt.
1378 */
1379 if(attr->mode & ATTR_GFX) {
1380 if(c[0] >= 0x41 && c[0] <= 0x7e
1381 && vt100_0[c[0] - 0x41]) {
1382 c = vt100_0[c[0] - 0x41];
1383 }
1384 }
1385
1386 term.dirty[y] = 1;
1387 term.line[y][x] = *attr;
1388 memcpy(term.line[y][x].c, c, UTF_SIZ);
1389 term.line[y][x].state |= GLYPH_SET;
1390 }
1391
1392 void
1393 tclearregion(int x1, int y1, int x2, int y2) {
1394 int x, y, temp;
1395
1396 if(x1 > x2)
1397 temp = x1, x1 = x2, x2 = temp;
1398 if(y1 > y2)
1399 temp = y1, y1 = y2, y2 = temp;
1400
1401 LIMIT(x1, 0, term.col-1);
1402 LIMIT(x2, 0, term.col-1);
1403 LIMIT(y1, 0, term.row-1);
1404 LIMIT(y2, 0, term.row-1);
1405
1406 for(y = y1; y <= y2; y++) {
1407 term.dirty[y] = 1;
1408 for(x = x1; x <= x2; x++) {
1409 term.line[y][x] = term.c.attr;
1410 memcpy(term.line[y][x].c, " ", 2);
1411 term.line[y][x].state |= GLYPH_SET;
1412 }
1413 }
1414 }
1415
1416 void
1417 tdeletechar(int n) {
1418 int src = term.c.x + n;
1419 int dst = term.c.x;
1420 int size = term.col - src;
1421
1422 term.dirty[term.c.y] = 1;
1423
1424 if(src >= term.col) {
1425 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1426 return;
1427 }
1428
1429 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1430 size * sizeof(Glyph));
1431 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1432 }
1433
1434 void
1435 tinsertblank(int n) {
1436 int src = term.c.x;
1437 int dst = src + n;
1438 int size = term.col - dst;
1439
1440 term.dirty[term.c.y] = 1;
1441
1442 if(dst >= term.col) {
1443 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1444 return;
1445 }
1446
1447 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1448 size * sizeof(Glyph));
1449 tclearregion(src, term.c.y, dst - 1, term.c.y);
1450 }
1451
1452 void
1453 tinsertblankline(int n) {
1454 if(term.c.y < term.top || term.c.y > term.bot)
1455 return;
1456
1457 tscrolldown(term.c.y, n);
1458 }
1459
1460 void
1461 tdeleteline(int n) {
1462 if(term.c.y < term.top || term.c.y > term.bot)
1463 return;
1464
1465 tscrollup(term.c.y, n);
1466 }
1467
1468 void
1469 tsetattr(int *attr, int l) {
1470 int i;
1471
1472 for(i = 0; i < l; i++) {
1473 switch(attr[i]) {
1474 case 0:
1475 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1476 | ATTR_BOLD | ATTR_ITALIC \
1477 | ATTR_BLINK);
1478 term.c.attr.fg = defaultfg;
1479 term.c.attr.bg = defaultbg;
1480 break;
1481 case 1:
1482 term.c.attr.mode |= ATTR_BOLD;
1483 break;
1484 case 3:
1485 term.c.attr.mode |= ATTR_ITALIC;
1486 break;
1487 case 4:
1488 term.c.attr.mode |= ATTR_UNDERLINE;
1489 break;
1490 case 5: /* slow blink */
1491 case 6: /* rapid blink */
1492 term.c.attr.mode |= ATTR_BLINK;
1493 break;
1494 case 7:
1495 term.c.attr.mode |= ATTR_REVERSE;
1496 break;
1497 case 21:
1498 case 22:
1499 term.c.attr.mode &= ~ATTR_BOLD;
1500 break;
1501 case 23:
1502 term.c.attr.mode &= ~ATTR_ITALIC;
1503 break;
1504 case 24:
1505 term.c.attr.mode &= ~ATTR_UNDERLINE;
1506 break;
1507 case 25:
1508 case 26:
1509 term.c.attr.mode &= ~ATTR_BLINK;
1510 break;
1511 case 27:
1512 term.c.attr.mode &= ~ATTR_REVERSE;
1513 break;
1514 case 38:
1515 if(i + 2 < l && attr[i + 1] == 5) {
1516 i += 2;
1517 if(BETWEEN(attr[i], 0, 255)) {
1518 term.c.attr.fg = attr[i];
1519 } else {
1520 fprintf(stderr,
1521 "erresc: bad fgcolor %d\n",
1522 attr[i]);
1523 }
1524 } else {
1525 fprintf(stderr,
1526 "erresc(38): gfx attr %d unknown\n",
1527 attr[i]);
1528 }
1529 break;
1530 case 39:
1531 term.c.attr.fg = defaultfg;
1532 break;
1533 case 48:
1534 if(i + 2 < l && attr[i + 1] == 5) {
1535 i += 2;
1536 if(BETWEEN(attr[i], 0, 255)) {
1537 term.c.attr.bg = attr[i];
1538 } else {
1539 fprintf(stderr,
1540 "erresc: bad bgcolor %d\n",
1541 attr[i]);
1542 }
1543 } else {
1544 fprintf(stderr,
1545 "erresc(48): gfx attr %d unknown\n",
1546 attr[i]);
1547 }
1548 break;
1549 case 49:
1550 term.c.attr.bg = defaultbg;
1551 break;
1552 default:
1553 if(BETWEEN(attr[i], 30, 37)) {
1554 term.c.attr.fg = attr[i] - 30;
1555 } else if(BETWEEN(attr[i], 40, 47)) {
1556 term.c.attr.bg = attr[i] - 40;
1557 } else if(BETWEEN(attr[i], 90, 97)) {
1558 term.c.attr.fg = attr[i] - 90 + 8;
1559 } else if(BETWEEN(attr[i], 100, 107)) {
1560 term.c.attr.bg = attr[i] - 100 + 8;
1561 } else {
1562 fprintf(stderr,
1563 "erresc(default): gfx attr %d unknown\n",
1564 attr[i]), csidump();
1565 }
1566 break;
1567 }
1568 }
1569 }
1570
1571 void
1572 tsetscroll(int t, int b) {
1573 int temp;
1574
1575 LIMIT(t, 0, term.row-1);
1576 LIMIT(b, 0, term.row-1);
1577 if(t > b) {
1578 temp = t;
1579 t = b;
1580 b = temp;
1581 }
1582 term.top = t;
1583 term.bot = b;
1584 }
1585
1586 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1587
1588 void
1589 tsetmode(bool priv, bool set, int *args, int narg) {
1590 int *lim, mode;
1591 bool alt;
1592
1593 for(lim = args + narg; args < lim; ++args) {
1594 if(priv) {
1595 switch(*args) {
1596 break;
1597 case 1: /* DECCKM -- Cursor key */
1598 MODBIT(term.mode, set, MODE_APPCURSOR);
1599 break;
1600 case 5: /* DECSCNM -- Reverse video */
1601 mode = term.mode;
1602 MODBIT(term.mode, set, MODE_REVERSE);
1603 if(mode != term.mode)
1604 redraw(REDRAW_TIMEOUT);
1605 break;
1606 case 6: /* DECOM -- Origin */
1607 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1608 tmoveato(0, 0);
1609 break;
1610 case 7: /* DECAWM -- Auto wrap */
1611 MODBIT(term.mode, set, MODE_WRAP);
1612 break;
1613 case 0: /* Error (IGNORED) */
1614 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1615 case 3: /* DECCOLM -- Column (IGNORED) */
1616 case 4: /* DECSCLM -- Scroll (IGNORED) */
1617 case 8: /* DECARM -- Auto repeat (IGNORED) */
1618 case 18: /* DECPFF -- Printer feed (IGNORED) */
1619 case 19: /* DECPEX -- Printer extent (IGNORED) */
1620 case 42: /* DECNRCM -- National characters (IGNORED) */
1621 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1622 break;
1623 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1624 MODBIT(term.mode, !set, MODE_HIDE);
1625 break;
1626 case 1000: /* 1000,1002: enable xterm mouse report */
1627 MODBIT(term.mode, set, MODE_MOUSEBTN);
1628 MODBIT(term.mode, 0, MODE_MOUSEMOTION);
1629 break;
1630 case 1002:
1631 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1632 MODBIT(term.mode, 0, MODE_MOUSEBTN);
1633 break;
1634 case 1006:
1635 MODBIT(term.mode, set, MODE_MOUSESGR);
1636 break;
1637 case 1049: /* = 1047 and 1048 */
1638 case 47:
1639 case 1047:
1640 if (!allowaltscreen)
1641 break;
1642
1643 alt = IS_SET(MODE_ALTSCREEN);
1644 if(alt) {
1645 tclearregion(0, 0, term.col-1,
1646 term.row-1);
1647 }
1648 if(set ^ alt) /* set is always 1 or 0 */
1649 tswapscreen();
1650 if(*args != 1049)
1651 break;
1652 /* FALLTRU */
1653 case 1048:
1654 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1655 break;
1656 default:
1657 fprintf(stderr,
1658 "erresc: unknown private set/reset mode %d\n",
1659 *args);
1660 break;
1661 }
1662 } else {
1663 switch(*args) {
1664 case 0: /* Error (IGNORED) */
1665 break;
1666 case 2: /* KAM -- keyboard action */
1667 MODBIT(term.mode, set, MODE_KBDLOCK);
1668 break;
1669 case 4: /* IRM -- Insertion-replacement */
1670 MODBIT(term.mode, set, MODE_INSERT);
1671 break;
1672 case 12: /* SRM -- Send/Receive */
1673 MODBIT(term.mode, !set, MODE_ECHO);
1674 break;
1675 case 20: /* LNM -- Linefeed/new line */
1676 MODBIT(term.mode, set, MODE_CRLF);
1677 break;
1678 default:
1679 fprintf(stderr,
1680 "erresc: unknown set/reset mode %d\n",
1681 *args);
1682 break;
1683 }
1684 }
1685 }
1686 }
1687 #undef MODBIT
1688
1689
1690 void
1691 csihandle(void) {
1692 switch(csiescseq.mode) {
1693 default:
1694 unknown:
1695 fprintf(stderr, "erresc: unknown csi ");
1696 csidump();
1697 /* die(""); */
1698 break;
1699 case '@': /* ICH -- Insert <n> blank char */
1700 DEFAULT(csiescseq.arg[0], 1);
1701 tinsertblank(csiescseq.arg[0]);
1702 break;
1703 case 'A': /* CUU -- Cursor <n> Up */
1704 DEFAULT(csiescseq.arg[0], 1);
1705 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1706 break;
1707 case 'B': /* CUD -- Cursor <n> Down */
1708 case 'e': /* VPR --Cursor <n> Down */
1709 DEFAULT(csiescseq.arg[0], 1);
1710 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1711 break;
1712 case 'c': /* DA -- Device Attributes */
1713 if(csiescseq.arg[0] == 0)
1714 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1715 break;
1716 case 'C': /* CUF -- Cursor <n> Forward */
1717 case 'a': /* HPR -- Cursor <n> Forward */
1718 DEFAULT(csiescseq.arg[0], 1);
1719 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1720 break;
1721 case 'D': /* CUB -- Cursor <n> Backward */
1722 DEFAULT(csiescseq.arg[0], 1);
1723 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1724 break;
1725 case 'E': /* CNL -- Cursor <n> Down and first col */
1726 DEFAULT(csiescseq.arg[0], 1);
1727 tmoveto(0, term.c.y+csiescseq.arg[0]);
1728 break;
1729 case 'F': /* CPL -- Cursor <n> Up and first col */
1730 DEFAULT(csiescseq.arg[0], 1);
1731 tmoveto(0, term.c.y-csiescseq.arg[0]);
1732 break;
1733 case 'g': /* TBC -- Tabulation clear */
1734 switch(csiescseq.arg[0]) {
1735 case 0: /* clear current tab stop */
1736 term.tabs[term.c.x] = 0;
1737 break;
1738 case 3: /* clear all the tabs */
1739 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1740 break;
1741 default:
1742 goto unknown;
1743 }
1744 break;
1745 case 'G': /* CHA -- Move to <col> */
1746 case '`': /* HPA */
1747 DEFAULT(csiescseq.arg[0], 1);
1748 tmoveto(csiescseq.arg[0]-1, term.c.y);
1749 break;
1750 case 'H': /* CUP -- Move to <row> <col> */
1751 case 'f': /* HVP */
1752 DEFAULT(csiescseq.arg[0], 1);
1753 DEFAULT(csiescseq.arg[1], 1);
1754 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1755 break;
1756 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1757 DEFAULT(csiescseq.arg[0], 1);
1758 while(csiescseq.arg[0]--)
1759 tputtab(1);
1760 break;
1761 case 'J': /* ED -- Clear screen */
1762 sel.bx = -1;
1763 switch(csiescseq.arg[0]) {
1764 case 0: /* below */
1765 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1766 if(term.c.y < term.row-1) {
1767 tclearregion(0, term.c.y+1, term.col-1,
1768 term.row-1);
1769 }
1770 break;
1771 case 1: /* above */
1772 if(term.c.y > 1)
1773 tclearregion(0, 0, term.col-1, term.c.y-1);
1774 tclearregion(0, term.c.y, term.c.x, term.c.y);
1775 break;
1776 case 2: /* all */
1777 tclearregion(0, 0, term.col-1, term.row-1);
1778 break;
1779 default:
1780 goto unknown;
1781 }
1782 break;
1783 case 'K': /* EL -- Clear line */
1784 switch(csiescseq.arg[0]) {
1785 case 0: /* right */
1786 tclearregion(term.c.x, term.c.y, term.col-1,
1787 term.c.y);
1788 break;
1789 case 1: /* left */
1790 tclearregion(0, term.c.y, term.c.x, term.c.y);
1791 break;
1792 case 2: /* all */
1793 tclearregion(0, term.c.y, term.col-1, term.c.y);
1794 break;
1795 }
1796 break;
1797 case 'S': /* SU -- Scroll <n> line up */
1798 DEFAULT(csiescseq.arg[0], 1);
1799 tscrollup(term.top, csiescseq.arg[0]);
1800 break;
1801 case 'T': /* SD -- Scroll <n> line down */
1802 DEFAULT(csiescseq.arg[0], 1);
1803 tscrolldown(term.top, csiescseq.arg[0]);
1804 break;
1805 case 'L': /* IL -- Insert <n> blank lines */
1806 DEFAULT(csiescseq.arg[0], 1);
1807 tinsertblankline(csiescseq.arg[0]);
1808 break;
1809 case 'l': /* RM -- Reset Mode */
1810 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1811 break;
1812 case 'M': /* DL -- Delete <n> lines */
1813 DEFAULT(csiescseq.arg[0], 1);
1814 tdeleteline(csiescseq.arg[0]);
1815 break;
1816 case 'X': /* ECH -- Erase <n> char */
1817 DEFAULT(csiescseq.arg[0], 1);
1818 tclearregion(term.c.x, term.c.y,
1819 term.c.x + csiescseq.arg[0] - 1, term.c.y);
1820 break;
1821 case 'P': /* DCH -- Delete <n> char */
1822 DEFAULT(csiescseq.arg[0], 1);
1823 tdeletechar(csiescseq.arg[0]);
1824 break;
1825 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1826 DEFAULT(csiescseq.arg[0], 1);
1827 while(csiescseq.arg[0]--)
1828 tputtab(0);
1829 break;
1830 case 'd': /* VPA -- Move to <row> */
1831 DEFAULT(csiescseq.arg[0], 1);
1832 tmoveato(term.c.x, csiescseq.arg[0]-1);
1833 break;
1834 case 'h': /* SM -- Set terminal mode */
1835 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1836 break;
1837 case 'm': /* SGR -- Terminal attribute (color) */
1838 tsetattr(csiescseq.arg, csiescseq.narg);
1839 break;
1840 case 'r': /* DECSTBM -- Set Scrolling Region */
1841 if(csiescseq.priv) {
1842 goto unknown;
1843 } else {
1844 DEFAULT(csiescseq.arg[0], 1);
1845 DEFAULT(csiescseq.arg[1], term.row);
1846 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1847 tmoveato(0, 0);
1848 }
1849 break;
1850 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1851 tcursor(CURSOR_SAVE);
1852 break;
1853 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1854 tcursor(CURSOR_LOAD);
1855 break;
1856 }
1857 }
1858
1859 void
1860 csidump(void) {
1861 int i;
1862 uint c;
1863
1864 printf("ESC[");
1865 for(i = 0; i < csiescseq.len; i++) {
1866 c = csiescseq.buf[i] & 0xff;
1867 if(isprint(c)) {
1868 putchar(c);
1869 } else if(c == '\n') {
1870 printf("(\\n)");
1871 } else if(c == '\r') {
1872 printf("(\\r)");
1873 } else if(c == 0x1b) {
1874 printf("(\\e)");
1875 } else {
1876 printf("(%02x)", c);
1877 }
1878 }
1879 putchar('\n');
1880 }
1881
1882 void
1883 csireset(void) {
1884 memset(&csiescseq, 0, sizeof(csiescseq));
1885 }
1886
1887 void
1888 strhandle(void) {
1889 char *p = NULL;
1890 int i, j, narg;
1891
1892 strparse();
1893 narg = strescseq.narg;
1894
1895 switch(strescseq.type) {
1896 case ']': /* OSC -- Operating System Command */
1897 switch(i = atoi(strescseq.args[0])) {
1898 case 0:
1899 case 1:
1900 case 2:
1901 if(narg > 1)
1902 xsettitle(strescseq.args[1]);
1903 break;
1904 case 4: /* color set */
1905 if(narg < 3)
1906 break;
1907 p = strescseq.args[2];
1908 /* fall through */
1909 case 104: /* color reset, here p = NULL */
1910 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
1911 if (!xsetcolorname(j, p)) {
1912 fprintf(stderr, "erresc: invalid color %s\n", p);
1913 } else {
1914 /*
1915 * TODO if defaultbg color is changed, borders
1916 * are dirty
1917 */
1918 redraw(0);
1919 }
1920 break;
1921 default:
1922 fprintf(stderr, "erresc: unknown str ");
1923 strdump();
1924 break;
1925 }
1926 break;
1927 case 'k': /* old title set compatibility */
1928 xsettitle(strescseq.args[0]);
1929 break;
1930 case 'P': /* DSC -- Device Control String */
1931 case '_': /* APC -- Application Program Command */
1932 case '^': /* PM -- Privacy Message */
1933 default:
1934 fprintf(stderr, "erresc: unknown str ");
1935 strdump();
1936 /* die(""); */
1937 break;
1938 }
1939 }
1940
1941 void
1942 strparse(void) {
1943 char *p = strescseq.buf;
1944
1945 strescseq.narg = 0;
1946 strescseq.buf[strescseq.len] = '\0';
1947 while(p && strescseq.narg < STR_ARG_SIZ)
1948 strescseq.args[strescseq.narg++] = strsep(&p, ";");
1949 }
1950
1951 void
1952 strdump(void) {
1953 int i;
1954 uint c;
1955
1956 printf("ESC%c", strescseq.type);
1957 for(i = 0; i < strescseq.len; i++) {
1958 c = strescseq.buf[i] & 0xff;
1959 if(c == '\0') {
1960 return;
1961 } else if(isprint(c)) {
1962 putchar(c);
1963 } else if(c == '\n') {
1964 printf("(\\n)");
1965 } else if(c == '\r') {
1966 printf("(\\r)");
1967 } else if(c == 0x1b) {
1968 printf("(\\e)");
1969 } else {
1970 printf("(%02x)", c);
1971 }
1972 }
1973 printf("ESC\\\n");
1974 }
1975
1976 void
1977 strreset(void) {
1978 memset(&strescseq, 0, sizeof(strescseq));
1979 }
1980
1981 void
1982 tputtab(bool forward) {
1983 uint x = term.c.x;
1984
1985 if(forward) {
1986 if(x == term.col)
1987 return;
1988 for(++x; x < term.col && !term.tabs[x]; ++x)
1989 /* nothing */ ;
1990 } else {
1991 if(x == 0)
1992 return;
1993 for(--x; x > 0 && !term.tabs[x]; --x)
1994 /* nothing */ ;
1995 }
1996 tmoveto(x, term.c.y);
1997 }
1998
1999 void
2000 techo(char *buf, int len) {
2001 for(; len > 0; buf++, len--) {
2002 char c = *buf;
2003
2004 if(c == '\033') { /* escape */
2005 tputc("^", 1);
2006 tputc("[", 1);
2007 } else if(c < '\x20') { /* control code */
2008 if(c != '\n' && c != '\r' && c != '\t') {
2009 c |= '\x40';
2010 tputc("^", 1);
2011 }
2012 tputc(&c, 1);
2013 } else {
2014 break;
2015 }
2016 }
2017 if(len)
2018 tputc(buf, len);
2019 }
2020
2021 void
2022 tputc(char *c, int len) {
2023 uchar ascii = *c;
2024 bool control = ascii < '\x20' || ascii == 0177;
2025
2026 if(iofd != -1) {
2027 if(xwrite(iofd, c, len) < 0) {
2028 fprintf(stderr, "Error writing in %s:%s\n",
2029 opt_io, strerror(errno));
2030 close(iofd);
2031 iofd = -1;
2032 }
2033 }
2034
2035 /*
2036 * STR sequences must be checked before anything else
2037 * because it can use some control codes as part of the sequence.
2038 */
2039 if(term.esc & ESC_STR) {
2040 switch(ascii) {
2041 case '\033':
2042 term.esc = ESC_START | ESC_STR_END;
2043 break;
2044 case '\a': /* backwards compatibility to xterm */
2045 term.esc = 0;
2046 strhandle();
2047 break;
2048 default:
2049 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2050 memmove(&strescseq.buf[strescseq.len], c, len);
2051 strescseq.len += len;
2052 } else {
2053 /*
2054 * Here is a bug in terminals. If the user never sends
2055 * some code to stop the str or esc command, then st
2056 * will stop responding. But this is better than
2057 * silently failing with unknown characters. At least
2058 * then users will report back.
2059 *
2060 * In the case users ever get fixed, here is the code:
2061 */
2062 /*
2063 * term.esc = 0;
2064 * strhandle();
2065 */
2066 }
2067 }
2068 return;
2069 }
2070
2071 /*
2072 * Actions of control codes must be performed as soon they arrive
2073 * because they can be embedded inside a control sequence, and
2074 * they must not cause conflicts with sequences.
2075 */
2076 if(control) {
2077 switch(ascii) {
2078 case '\t': /* HT */
2079 tputtab(1);
2080 return;
2081 case '\b': /* BS */
2082 tmoveto(term.c.x-1, term.c.y);
2083 return;
2084 case '\r': /* CR */
2085 tmoveto(0, term.c.y);
2086 return;
2087 case '\f': /* LF */
2088 case '\v': /* VT */
2089 case '\n': /* LF */
2090 /* go to first col if the mode is set */
2091 tnewline(IS_SET(MODE_CRLF));
2092 return;
2093 case '\a': /* BEL */
2094 if(!(xw.state & WIN_FOCUSED))
2095 xseturgency(1);
2096 return;
2097 case '\033': /* ESC */
2098 csireset();
2099 term.esc = ESC_START;
2100 return;
2101 case '\016': /* SO */
2102 case '\017': /* SI */
2103 /*
2104 * Different charsets are hard to handle. Applications
2105 * should use the right alt charset escapes for the
2106 * only reason they still exist: line drawing. The
2107 * rest is incompatible history st should not support.
2108 */
2109 return;
2110 case '\032': /* SUB */
2111 case '\030': /* CAN */
2112 csireset();
2113 return;
2114 case '\005': /* ENQ (IGNORED) */
2115 case '\000': /* NUL (IGNORED) */
2116 case '\021': /* XON (IGNORED) */
2117 case '\023': /* XOFF (IGNORED) */
2118 case 0177: /* DEL (IGNORED) */
2119 return;
2120 }
2121 } else if(term.esc & ESC_START) {
2122 if(term.esc & ESC_CSI) {
2123 csiescseq.buf[csiescseq.len++] = ascii;
2124 if(BETWEEN(ascii, 0x40, 0x7E)
2125 || csiescseq.len >= \
2126 sizeof(csiescseq.buf)-1) {
2127 term.esc = 0;
2128 csiparse();
2129 csihandle();
2130 }
2131 } else if(term.esc & ESC_STR_END) {
2132 term.esc = 0;
2133 if(ascii == '\\')
2134 strhandle();
2135 } else if(term.esc & ESC_ALTCHARSET) {
2136 switch(ascii) {
2137 case '0': /* Line drawing set */
2138 term.c.attr.mode |= ATTR_GFX;
2139 break;
2140 case 'B': /* USASCII */
2141 term.c.attr.mode &= ~ATTR_GFX;
2142 break;
2143 case 'A': /* UK (IGNORED) */
2144 case '<': /* multinational charset (IGNORED) */
2145 case '5': /* Finnish (IGNORED) */
2146 case 'C': /* Finnish (IGNORED) */
2147 case 'K': /* German (IGNORED) */
2148 break;
2149 default:
2150 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2151 }
2152 term.esc = 0;
2153 } else if(term.esc & ESC_TEST) {
2154 if(ascii == '8') { /* DEC screen alignment test. */
2155 char E[UTF_SIZ] = "E";
2156 int x, y;
2157
2158 for(x = 0; x < term.col; ++x) {
2159 for(y = 0; y < term.row; ++y)
2160 tsetchar(E, &term.c.attr, x, y);
2161 }
2162 }
2163 term.esc = 0;
2164 } else {
2165 switch(ascii) {
2166 case '[':
2167 term.esc |= ESC_CSI;
2168 break;
2169 case '#':
2170 term.esc |= ESC_TEST;
2171 break;
2172 case 'P': /* DCS -- Device Control String */
2173 case '_': /* APC -- Application Program Command */
2174 case '^': /* PM -- Privacy Message */
2175 case ']': /* OSC -- Operating System Command */
2176 case 'k': /* old title set compatibility */
2177 strreset();
2178 strescseq.type = ascii;
2179 term.esc |= ESC_STR;
2180 break;
2181 case '(': /* set primary charset G0 */
2182 term.esc |= ESC_ALTCHARSET;
2183 break;
2184 case ')': /* set secondary charset G1 (IGNORED) */
2185 case '*': /* set tertiary charset G2 (IGNORED) */
2186 case '+': /* set quaternary charset G3 (IGNORED) */
2187 term.esc = 0;
2188 break;
2189 case 'D': /* IND -- Linefeed */
2190 if(term.c.y == term.bot) {
2191 tscrollup(term.top, 1);
2192 } else {
2193 tmoveto(term.c.x, term.c.y+1);
2194 }
2195 term.esc = 0;
2196 break;
2197 case 'E': /* NEL -- Next line */
2198 tnewline(1); /* always go to first col */
2199 term.esc = 0;
2200 break;
2201 case 'H': /* HTS -- Horizontal tab stop */
2202 term.tabs[term.c.x] = 1;
2203 term.esc = 0;
2204 break;
2205 case 'M': /* RI -- Reverse index */
2206 if(term.c.y == term.top) {
2207 tscrolldown(term.top, 1);
2208 } else {
2209 tmoveto(term.c.x, term.c.y-1);
2210 }
2211 term.esc = 0;
2212 break;
2213 case 'Z': /* DECID -- Identify Terminal */
2214 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2215 term.esc = 0;
2216 break;
2217 case 'c': /* RIS -- Reset to inital state */
2218 treset();
2219 term.esc = 0;
2220 xresettitle();
2221 break;
2222 case '=': /* DECPAM -- Application keypad */
2223 term.mode |= MODE_APPKEYPAD;
2224 term.esc = 0;
2225 break;
2226 case '>': /* DECPNM -- Normal keypad */
2227 term.mode &= ~MODE_APPKEYPAD;
2228 term.esc = 0;
2229 break;
2230 case '7': /* DECSC -- Save Cursor */
2231 tcursor(CURSOR_SAVE);
2232 term.esc = 0;
2233 break;
2234 case '8': /* DECRC -- Restore Cursor */
2235 tcursor(CURSOR_LOAD);
2236 term.esc = 0;
2237 break;
2238 case '\\': /* ST -- Stop */
2239 term.esc = 0;
2240 break;
2241 default:
2242 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2243 (uchar) ascii, isprint(ascii)? ascii:'.');
2244 term.esc = 0;
2245 }
2246 }
2247 /*
2248 * All characters which form part of a sequence are not
2249 * printed
2250 */
2251 return;
2252 }
2253 /*
2254 * Display control codes only if we are in graphic mode
2255 */
2256 if(control && !(term.c.attr.mode & ATTR_GFX))
2257 return;
2258 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2259 sel.bx = -1;
2260 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2261 tnewline(1); /* always go to first col */
2262
2263 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2264 memmove(&term.line[term.c.y][term.c.x+1],
2265 &term.line[term.c.y][term.c.x],
2266 (term.col - term.c.x - 1) * sizeof(Glyph));
2267 }
2268
2269 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2270 if(term.c.x+1 < term.col) {
2271 tmoveto(term.c.x+1, term.c.y);
2272 } else {
2273 term.c.state |= CURSOR_WRAPNEXT;
2274 }
2275 }
2276
2277 int
2278 tresize(int col, int row) {
2279 int i, x;
2280 int minrow = MIN(row, term.row);
2281 int mincol = MIN(col, term.col);
2282 int slide = term.c.y - row + 1;
2283 bool *bp;
2284
2285 if(col < 1 || row < 1)
2286 return 0;
2287
2288 /* free unneeded rows */
2289 i = 0;
2290 if(slide > 0) {
2291 /*
2292 * slide screen to keep cursor where we expect it -
2293 * tscrollup would work here, but we can optimize to
2294 * memmove because we're freeing the earlier lines
2295 */
2296 for(/* i = 0 */; i < slide; i++) {
2297 free(term.line[i]);
2298 free(term.alt[i]);
2299 }
2300 memmove(term.line, term.line + slide, row * sizeof(Line));
2301 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2302 }
2303 for(i += row; i < term.row; i++) {
2304 free(term.line[i]);
2305 free(term.alt[i]);
2306 }
2307
2308 /* resize to new height */
2309 term.line = xrealloc(term.line, row * sizeof(Line));
2310 term.alt = xrealloc(term.alt, row * sizeof(Line));
2311 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2312 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2313
2314 /* resize each row to new width, zero-pad if needed */
2315 for(i = 0; i < minrow; i++) {
2316 term.dirty[i] = 1;
2317 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2318 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2319 for(x = mincol; x < col; x++) {
2320 term.line[i][x].state = 0;
2321 term.alt[i][x].state = 0;
2322 }
2323 }
2324
2325 /* allocate any new rows */
2326 for(/* i == minrow */; i < row; i++) {
2327 term.dirty[i] = 1;
2328 term.line[i] = xcalloc(col, sizeof(Glyph));
2329 term.alt [i] = xcalloc(col, sizeof(Glyph));
2330 }
2331 if(col > term.col) {
2332 bp = term.tabs + term.col;
2333
2334 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2335 while(--bp > term.tabs && !*bp)
2336 /* nothing */ ;
2337 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2338 *bp = 1;
2339 }
2340 /* update terminal size */
2341 term.col = col;
2342 term.row = row;
2343 /* reset scrolling region */
2344 tsetscroll(0, row-1);
2345 /* make use of the LIMIT in tmoveto */
2346 tmoveto(term.c.x, term.c.y);
2347
2348 return (slide > 0);
2349 }
2350
2351 void
2352 xresize(int col, int row) {
2353 xw.tw = MAX(1, col * xw.cw);
2354 xw.th = MAX(1, row * xw.ch);
2355
2356 XFreePixmap(xw.dpy, xw.buf);
2357 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2358 DefaultDepth(xw.dpy, xw.scr));
2359 XftDrawChange(xw.draw, xw.buf);
2360 xclear(0, 0, xw.w, xw.h);
2361 }
2362
2363 static inline ushort
2364 sixd_to_16bit(int x) {
2365 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2366 }
2367
2368 void
2369 xloadcols(void) {
2370 int i, r, g, b;
2371 XRenderColor color = { .alpha = 0xffff };
2372
2373 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2374 for(i = 0; i < LEN(colorname); i++) {
2375 if(!colorname[i])
2376 continue;
2377 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2378 die("Could not allocate color '%s'\n", colorname[i]);
2379 }
2380 }
2381
2382 /* load colors [16-255] ; same colors as xterm */
2383 for(i = 16, r = 0; r < 6; r++) {
2384 for(g = 0; g < 6; g++) {
2385 for(b = 0; b < 6; b++) {
2386 color.red = sixd_to_16bit(r);
2387 color.green = sixd_to_16bit(g);
2388 color.blue = sixd_to_16bit(b);
2389 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2390 die("Could not allocate color %d\n", i);
2391 }
2392 i++;
2393 }
2394 }
2395 }
2396
2397 for(r = 0; r < 24; r++, i++) {
2398 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2399 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2400 &dc.col[i])) {
2401 die("Could not allocate color %d\n", i);
2402 }
2403 }
2404 }
2405
2406 int
2407 xsetcolorname(int x, const char *name) {
2408 XRenderColor color = { .alpha = 0xffff };
2409 Colour colour;
2410 if (x < 0 || x > LEN(colorname))
2411 return -1;
2412 if(!name) {
2413 if(16 <= x && x < 16 + 216) {
2414 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2415 color.red = sixd_to_16bit(r);
2416 color.green = sixd_to_16bit(g);
2417 color.blue = sixd_to_16bit(b);
2418 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2419 return 0; /* something went wrong */
2420 dc.col[x] = colour;
2421 return 1;
2422 } else if (16 + 216 <= x && x < 256) {
2423 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2424 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2425 return 0; /* something went wrong */
2426 dc.col[x] = colour;
2427 return 1;
2428 } else {
2429 name = colorname[x];
2430 }
2431 }
2432 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2433 return 0;
2434 dc.col[x] = colour;
2435 return 1;
2436 }
2437
2438 void
2439 xtermclear(int col1, int row1, int col2, int row2) {
2440 XftDrawRect(xw.draw,
2441 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2442 borderpx + col1 * xw.cw,
2443 borderpx + row1 * xw.ch,
2444 (col2-col1+1) * xw.cw,
2445 (row2-row1+1) * xw.ch);
2446 }
2447
2448 /*
2449 * Absolute coordinates.
2450 */
2451 void
2452 xclear(int x1, int y1, int x2, int y2) {
2453 XftDrawRect(xw.draw,
2454 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2455 x1, y1, x2-x1, y2-y1);
2456 }
2457
2458 void
2459 xhints(void) {
2460 XClassHint class = {opt_class ? opt_class : termname, termname};
2461 XWMHints wm = {.flags = InputHint, .input = 1};
2462 XSizeHints *sizeh = NULL;
2463
2464 sizeh = XAllocSizeHints();
2465 if(xw.isfixed == False) {
2466 sizeh->flags = PSize | PResizeInc | PBaseSize;
2467 sizeh->height = xw.h;
2468 sizeh->width = xw.w;
2469 sizeh->height_inc = xw.ch;
2470 sizeh->width_inc = xw.cw;
2471 sizeh->base_height = 2 * borderpx;
2472 sizeh->base_width = 2 * borderpx;
2473 } else {
2474 sizeh->flags = PMaxSize | PMinSize;
2475 sizeh->min_width = sizeh->max_width = xw.fw;
2476 sizeh->min_height = sizeh->max_height = xw.fh;
2477 }
2478
2479 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2480 XFree(sizeh);
2481 }
2482
2483 int
2484 xloadfont(Font *f, FcPattern *pattern) {
2485 FcPattern *match;
2486 FcResult result;
2487
2488 match = FcFontMatch(NULL, pattern, &result);
2489 if(!match)
2490 return 1;
2491
2492 if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
2493 FcPatternDestroy(match);
2494 return 1;
2495 }
2496
2497 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2498 FcPatternDestroy(match);
2499 return 1;
2500 }
2501
2502 f->pattern = FcPatternDuplicate(pattern);
2503
2504 f->ascent = f->match->ascent;
2505 f->descent = f->match->descent;
2506 f->lbearing = 0;
2507 f->rbearing = f->match->max_advance_width;
2508
2509 f->height = f->ascent + f->descent;
2510 f->width = f->lbearing + f->rbearing;
2511
2512 return 0;
2513 }
2514
2515 void
2516 xloadfonts(char *fontstr, int fontsize) {
2517 FcPattern *pattern;
2518 FcResult result;
2519 double fontval;
2520
2521 if(fontstr[0] == '-') {
2522 pattern = XftXlfdParse(fontstr, False, False);
2523 } else {
2524 pattern = FcNameParse((FcChar8 *)fontstr);
2525 }
2526
2527 if(!pattern)
2528 die("st: can't open font %s\n", fontstr);
2529
2530 if(fontsize > 0) {
2531 FcPatternDel(pattern, FC_PIXEL_SIZE);
2532 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2533 usedfontsize = fontsize;
2534 } else {
2535 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2536 if(result == FcResultMatch) {
2537 usedfontsize = (int)fontval;
2538 } else {
2539 /*
2540 * Default font size is 12, if none given. This is to
2541 * have a known usedfontsize value.
2542 */
2543 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2544 usedfontsize = 12;
2545 }
2546 }
2547
2548 FcConfigSubstitute(0, pattern, FcMatchPattern);
2549 FcDefaultSubstitute(pattern);
2550
2551 if(xloadfont(&dc.font, pattern))
2552 die("st: can't open font %s\n", fontstr);
2553
2554 /* Setting character width and height. */
2555 xw.cw = dc.font.width;
2556 xw.ch = dc.font.height;
2557
2558 FcPatternDel(pattern, FC_SLANT);
2559 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2560 if(xloadfont(&dc.ifont, pattern))
2561 die("st: can't open font %s\n", fontstr);
2562
2563 FcPatternDel(pattern, FC_WEIGHT);
2564 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2565 if(xloadfont(&dc.ibfont, pattern))
2566 die("st: can't open font %s\n", fontstr);
2567
2568 FcPatternDel(pattern, FC_SLANT);
2569 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2570 if(xloadfont(&dc.bfont, pattern))
2571 die("st: can't open font %s\n", fontstr);
2572
2573 FcPatternDestroy(pattern);
2574 }
2575
2576 void
2577 xunloadfonts(void) {
2578 int i, ip;
2579
2580 /*
2581 * Free the loaded fonts in the font cache. This is done backwards
2582 * from the frccur.
2583 */
2584 for(i = 0, ip = frccur; i < frclen; i++, ip--) {
2585 if(ip < 0)
2586 ip = LEN(frc) - 1;
2587 XftFontClose(xw.dpy, frc[ip].font);
2588 }
2589 frccur = -1;
2590 frclen = 0;
2591
2592 XftFontClose(xw.dpy, dc.font.match);
2593 FcPatternDestroy(dc.font.pattern);
2594 FcFontSetDestroy(dc.font.set);
2595 XftFontClose(xw.dpy, dc.bfont.match);
2596 FcPatternDestroy(dc.bfont.pattern);
2597 FcFontSetDestroy(dc.bfont.set);
2598 XftFontClose(xw.dpy, dc.ifont.match);
2599 FcPatternDestroy(dc.ifont.pattern);
2600 FcFontSetDestroy(dc.ifont.set);
2601 XftFontClose(xw.dpy, dc.ibfont.match);
2602 FcPatternDestroy(dc.ibfont.pattern);
2603 FcFontSetDestroy(dc.ibfont.set);
2604 }
2605
2606 void
2607 xzoom(const Arg *arg) {
2608 xunloadfonts();
2609 xloadfonts(usedfont, usedfontsize + arg->i);
2610 cresize(0, 0);
2611 redraw(0);
2612 }
2613
2614 void
2615 xinit(void) {
2616 XSetWindowAttributes attrs;
2617 XGCValues gcvalues;
2618 Cursor cursor;
2619 Window parent;
2620 int sw, sh;
2621
2622 if(!(xw.dpy = XOpenDisplay(NULL)))
2623 die("Can't open display\n");
2624 xw.scr = XDefaultScreen(xw.dpy);
2625 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2626
2627 /* font */
2628 if(!FcInit())
2629 die("Could not init fontconfig.\n");
2630
2631 usedfont = (opt_font == NULL)? font : opt_font;
2632 xloadfonts(usedfont, 0);
2633
2634 /* colors */
2635 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2636 xloadcols();
2637
2638 /* adjust fixed window geometry */
2639 if(xw.isfixed) {
2640 sw = DisplayWidth(xw.dpy, xw.scr);
2641 sh = DisplayHeight(xw.dpy, xw.scr);
2642 if(xw.fx < 0)
2643 xw.fx = sw + xw.fx - xw.fw - 1;
2644 if(xw.fy < 0)
2645 xw.fy = sh + xw.fy - xw.fh - 1;
2646
2647 xw.h = xw.fh;
2648 xw.w = xw.fw;
2649 } else {
2650 /* window - default size */
2651 xw.h = 2 * borderpx + term.row * xw.ch;
2652 xw.w = 2 * borderpx + term.col * xw.cw;
2653 xw.fx = 0;
2654 xw.fy = 0;
2655 }
2656
2657 /* Events */
2658 attrs.background_pixel = dc.col[defaultbg].pixel;
2659 attrs.border_pixel = dc.col[defaultbg].pixel;
2660 attrs.bit_gravity = NorthWestGravity;
2661 attrs.event_mask = FocusChangeMask | KeyPressMask
2662 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2663 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2664 attrs.colormap = xw.cmap;
2665
2666 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2667 XRootWindow(xw.dpy, xw.scr);
2668 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2669 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2670 xw.vis,
2671 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2672 | CWColormap,
2673 &attrs);
2674
2675 memset(&gcvalues, 0, sizeof(gcvalues));
2676 gcvalues.graphics_exposures = False;
2677 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2678 &gcvalues);
2679 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2680 DefaultDepth(xw.dpy, xw.scr));
2681 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2682 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2683
2684 /* Xft rendering context */
2685 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2686
2687 /* input methods */
2688 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2689 XSetLocaleModifiers("@im=local");
2690 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2691 XSetLocaleModifiers("@im=");
2692 if((xw.xim = XOpenIM(xw.dpy,
2693 NULL, NULL, NULL)) == NULL) {
2694 die("XOpenIM failed. Could not open input"
2695 " device.\n");
2696 }
2697 }
2698 }
2699 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2700 | XIMStatusNothing, XNClientWindow, xw.win,
2701 XNFocusWindow, xw.win, NULL);
2702 if(xw.xic == NULL)
2703 die("XCreateIC failed. Could not obtain input method.\n");
2704
2705 /* white cursor, black outline */
2706 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2707 XDefineCursor(xw.dpy, xw.win, cursor);
2708 XRecolorCursor(xw.dpy, cursor,
2709 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2710 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2711
2712 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2713 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2714 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2715
2716 xresettitle();
2717 XMapWindow(xw.dpy, xw.win);
2718 xhints();
2719 XSync(xw.dpy, 0);
2720 }
2721
2722 void
2723 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2724 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2725 width = charlen * xw.cw, xp, i;
2726 int frp, frcflags;
2727 int u8fl, u8fblen, u8cblen, doesexist;
2728 char *u8c, *u8fs;
2729 long u8char;
2730 Font *font = &dc.font;
2731 FcResult fcres;
2732 FcPattern *fcpattern, *fontpattern;
2733 FcFontSet *fcsets[] = { NULL };
2734 FcCharSet *fccharset;
2735 Colour *fg, *bg, *temp, revfg, revbg;
2736 XRenderColor colfg, colbg;
2737
2738 frcflags = FRC_NORMAL;
2739
2740 if(base.mode & ATTR_ITALIC) {
2741 if(base.fg == defaultfg)
2742 base.fg = defaultitalic;
2743 font = &dc.ifont;
2744 frcflags = FRC_ITALIC;
2745 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2746 if(base.fg == defaultfg)
2747 base.fg = defaultitalic;
2748 font = &dc.ibfont;
2749 frcflags = FRC_ITALICBOLD;
2750 } else if(base.mode & ATTR_UNDERLINE) {
2751 if(base.fg == defaultfg)
2752 base.fg = defaultunderline;
2753 }
2754 fg = &dc.col[base.fg];
2755 bg = &dc.col[base.bg];
2756
2757 if(base.mode & ATTR_BOLD) {
2758 if(BETWEEN(base.fg, 0, 7)) {
2759 /* basic system colors */
2760 fg = &dc.col[base.fg + 8];
2761 } else if(BETWEEN(base.fg, 16, 195)) {
2762 /* 256 colors */
2763 fg = &dc.col[base.fg + 36];
2764 } else if(BETWEEN(base.fg, 232, 251)) {
2765 /* greyscale */
2766 fg = &dc.col[base.fg + 4];
2767 }
2768 /*
2769 * Those ranges will not be brightened:
2770 * 8 - 15 – bright system colors
2771 * 196 - 231 – highest 256 color cube
2772 * 252 - 255 – brightest colors in greyscale
2773 */
2774 font = &dc.bfont;
2775 frcflags = FRC_BOLD;
2776 }
2777
2778 if(IS_SET(MODE_REVERSE)) {
2779 if(fg == &dc.col[defaultfg]) {
2780 fg = &dc.col[defaultbg];
2781 } else {
2782 colfg.red = ~fg->color.red;
2783 colfg.green = ~fg->color.green;
2784 colfg.blue = ~fg->color.blue;
2785 colfg.alpha = fg->color.alpha;
2786 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2787 fg = &revfg;
2788 }
2789
2790 if(bg == &dc.col[defaultbg]) {
2791 bg = &dc.col[defaultfg];
2792 } else {
2793 colbg.red = ~bg->color.red;
2794 colbg.green = ~bg->color.green;
2795 colbg.blue = ~bg->color.blue;
2796 colbg.alpha = bg->color.alpha;
2797 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2798 bg = &revbg;
2799 }
2800 }
2801
2802 if(base.mode & ATTR_REVERSE) {
2803 temp = fg;
2804 fg = bg;
2805 bg = temp;
2806 }
2807
2808 /* Intelligent cleaning up of the borders. */
2809 if(x == 0) {
2810 xclear(0, (y == 0)? 0 : winy, borderpx,
2811 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2812 }
2813 if(x + charlen >= term.col) {
2814 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2815 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2816 }
2817 if(y == 0)
2818 xclear(winx, 0, winx + width, borderpx);
2819 if(y == term.row-1)
2820 xclear(winx, winy + xw.ch, winx + width, xw.h);
2821
2822 /* Clean up the region we want to draw to. */
2823 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2824
2825 fcsets[0] = font->set;
2826 for(xp = winx; bytelen > 0;) {
2827 /*
2828 * Search for the range in the to be printed string of glyphs
2829 * that are in the main font. Then print that range. If
2830 * some glyph is found that is not in the font, do the
2831 * fallback dance.
2832 */
2833 u8fs = s;
2834 u8fblen = 0;
2835 u8fl = 0;
2836 for(;;) {
2837 u8c = s;
2838 u8cblen = utf8decode(s, &u8char);
2839 s += u8cblen;
2840 bytelen -= u8cblen;
2841
2842 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
2843 if(!doesexist || bytelen <= 0) {
2844 if(bytelen <= 0) {
2845 if(doesexist) {
2846 u8fl++;
2847 u8fblen += u8cblen;
2848 }
2849 }
2850
2851 if(u8fl > 0) {
2852 XftDrawStringUtf8(xw.draw, fg,
2853 font->match, xp,
2854 winy + font->ascent,
2855 (FcChar8 *)u8fs,
2856 u8fblen);
2857 xp += font->width * u8fl;
2858 }
2859 break;
2860 }
2861
2862 u8fl++;
2863 u8fblen += u8cblen;
2864 }
2865 if(doesexist)
2866 break;
2867
2868 frp = frccur;
2869 /* Search the font cache. */
2870 for(i = 0; i < frclen; i++, frp--) {
2871 if(frp <= 0)
2872 frp = LEN(frc) - 1;
2873
2874 if(frc[frp].c == u8char
2875 && frc[frp].flags == frcflags) {
2876 break;
2877 }
2878 }
2879
2880 /* Nothing was found. */
2881 if(i >= frclen) {
2882 /*
2883 * Nothing was found in the cache. Now use
2884 * some dozen of Fontconfig calls to get the
2885 * font for one single character.
2886 */
2887 fcpattern = FcPatternDuplicate(font->pattern);
2888 fccharset = FcCharSetCreate();
2889
2890 FcCharSetAddChar(fccharset, u8char);
2891 FcPatternAddCharSet(fcpattern, FC_CHARSET,
2892 fccharset);
2893 FcPatternAddBool(fcpattern, FC_SCALABLE,
2894 FcTrue);
2895
2896 FcConfigSubstitute(0, fcpattern,
2897 FcMatchPattern);
2898 FcDefaultSubstitute(fcpattern);
2899
2900 fontpattern = FcFontSetMatch(0, fcsets,
2901 FcTrue, fcpattern, &fcres);
2902
2903 /*
2904 * Overwrite or create the new cache entry.
2905 */
2906 frccur++;
2907 frclen++;
2908 if(frccur >= LEN(frc))
2909 frccur = 0;
2910 if(frclen > LEN(frc)) {
2911 frclen = LEN(frc);
2912 XftFontClose(xw.dpy, frc[frccur].font);
2913 }
2914
2915 frc[frccur].font = XftFontOpenPattern(xw.dpy,
2916 fontpattern);
2917 frc[frccur].c = u8char;
2918 frc[frccur].flags = frcflags;
2919
2920 FcPatternDestroy(fcpattern);
2921 FcCharSetDestroy(fccharset);
2922
2923 frp = frccur;
2924 }
2925
2926 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
2927 xp, winy + frc[frp].font->ascent,
2928 (FcChar8 *)u8c, u8cblen);
2929
2930 xp += font->width;
2931 }
2932
2933 /*
2934 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
2935 winy + font->ascent, (FcChar8 *)s, bytelen);
2936 */
2937
2938 if(base.mode & ATTR_UNDERLINE) {
2939 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
2940 width, 1);
2941 }
2942 }
2943
2944 void
2945 xdrawcursor(void) {
2946 static int oldx = 0, oldy = 0;
2947 int sl;
2948 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs, 0};
2949
2950 LIMIT(oldx, 0, term.col-1);
2951 LIMIT(oldy, 0, term.row-1);
2952
2953 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2954 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2955
2956 /* remove the old cursor */
2957 if(term.line[oldy][oldx].state & GLYPH_SET) {
2958 sl = utf8size(term.line[oldy][oldx].c);
2959 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2960 oldy, 1, sl);
2961 } else {
2962 xtermclear(oldx, oldy, oldx, oldy);
2963 }
2964
2965 /* draw the new one */
2966 if(!(IS_SET(MODE_HIDE))) {
2967 if(xw.state & WIN_FOCUSED) {
2968 if(IS_SET(MODE_REVERSE)) {
2969 g.mode |= ATTR_REVERSE;
2970 g.fg = defaultcs;
2971 g.bg = defaultfg;
2972 }
2973
2974 sl = utf8size(g.c);
2975 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2976 } else {
2977 XftDrawRect(xw.draw, &dc.col[defaultcs],
2978 borderpx + term.c.x * xw.cw,
2979 borderpx + term.c.y * xw.ch,
2980 xw.cw - 1, 1);
2981 XftDrawRect(xw.draw, &dc.col[defaultcs],
2982 borderpx + term.c.x * xw.cw,
2983 borderpx + term.c.y * xw.ch,
2984 1, xw.ch - 1);
2985 XftDrawRect(xw.draw, &dc.col[defaultcs],
2986 borderpx + (term.c.x + 1) * xw.cw - 1,
2987 borderpx + term.c.y * xw.ch,
2988 1, xw.ch - 1);
2989 XftDrawRect(xw.draw, &dc.col[defaultcs],
2990 borderpx + term.c.x * xw.cw,
2991 borderpx + (term.c.y + 1) * xw.ch - 1,
2992 xw.cw, 1);
2993 }
2994 oldx = term.c.x, oldy = term.c.y;
2995 }
2996 }
2997
2998
2999 void
3000 xsettitle(char *p) {
3001 XTextProperty prop;
3002
3003 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3004 &prop);
3005 XSetWMName(xw.dpy, xw.win, &prop);
3006 }
3007
3008 void
3009 xresettitle(void) {
3010 xsettitle(opt_title ? opt_title : "st");
3011 }
3012
3013 void
3014 redraw(int timeout) {
3015 struct timespec tv = {0, timeout * 1000};
3016
3017 tfulldirt();
3018 draw();
3019
3020 if(timeout > 0) {
3021 nanosleep(&tv, NULL);
3022 XSync(xw.dpy, False); /* necessary for a good tput flash */
3023 }
3024 }
3025
3026 void
3027 draw(void) {
3028 drawregion(0, 0, term.col, term.row);
3029 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3030 xw.h, 0, 0);
3031 XSetForeground(xw.dpy, dc.gc,
3032 dc.col[IS_SET(MODE_REVERSE)?
3033 defaultfg : defaultbg].pixel);
3034 }
3035
3036 void
3037 drawregion(int x1, int y1, int x2, int y2) {
3038 int ic, ib, x, y, ox, sl;
3039 Glyph base, new;
3040 char buf[DRAW_BUF_SIZ];
3041 bool ena_sel = sel.bx != -1;
3042
3043 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3044 ena_sel = 0;
3045
3046 if(!(xw.state & WIN_VISIBLE))
3047 return;
3048
3049 for(y = y1; y < y2; y++) {
3050 if(!term.dirty[y])
3051 continue;
3052
3053 xtermclear(0, y, term.col, y);
3054 term.dirty[y] = 0;
3055 base = term.line[y][0];
3056 ic = ib = ox = 0;
3057 for(x = x1; x < x2; x++) {
3058 new = term.line[y][x];
3059 if(ena_sel && *(new.c) && selected(x, y))
3060 new.mode ^= ATTR_REVERSE;
3061 if(ib > 0 && (!(new.state & GLYPH_SET)
3062 || ATTRCMP(base, new)
3063 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3064 xdraws(buf, base, ox, y, ic, ib);
3065 ic = ib = 0;
3066 }
3067 if(new.state & GLYPH_SET) {
3068 if(ib == 0) {
3069 ox = x;
3070 base = new;
3071 }
3072
3073 sl = utf8size(new.c);
3074 memcpy(buf+ib, new.c, sl);
3075 ib += sl;
3076 ++ic;
3077 }
3078 }
3079 if(ib > 0)
3080 xdraws(buf, base, ox, y, ic, ib);
3081 }
3082 xdrawcursor();
3083 }
3084
3085 void
3086 expose(XEvent *ev) {
3087 XExposeEvent *e = &ev->xexpose;
3088
3089 if(xw.state & WIN_REDRAW) {
3090 if(!e->count)
3091 xw.state &= ~WIN_REDRAW;
3092 }
3093 redraw(0);
3094 }
3095
3096 void
3097 visibility(XEvent *ev) {
3098 XVisibilityEvent *e = &ev->xvisibility;
3099
3100 if(e->state == VisibilityFullyObscured) {
3101 xw.state &= ~WIN_VISIBLE;
3102 } else if(!(xw.state & WIN_VISIBLE)) {
3103 /* need a full redraw for next Expose, not just a buf copy */
3104 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3105 }
3106 }
3107
3108 void
3109 unmap(XEvent *ev) {
3110 xw.state &= ~WIN_VISIBLE;
3111 }
3112
3113 void
3114 xseturgency(int add) {
3115 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3116
3117 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3118 XSetWMHints(xw.dpy, xw.win, h);
3119 XFree(h);
3120 }
3121
3122 void
3123 focus(XEvent *ev) {
3124 XFocusChangeEvent *e = &ev->xfocus;
3125
3126 if(e->mode == NotifyGrab)
3127 return;
3128
3129 if(ev->type == FocusIn) {
3130 XSetICFocus(xw.xic);
3131 xw.state |= WIN_FOCUSED;
3132 xseturgency(0);
3133 } else {
3134 XUnsetICFocus(xw.xic);
3135 xw.state &= ~WIN_FOCUSED;
3136 }
3137 }
3138
3139 inline bool
3140 match(uint mask, uint state) {
3141 state &= ~(ignoremod);
3142
3143 if(mask == XK_NO_MOD && state)
3144 return false;
3145 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3146 return false;
3147 if((state & mask) != state)
3148 return false;
3149 return true;
3150 }
3151
3152 void
3153 numlock(const Arg *dummy) {
3154 term.numlock ^= 1;
3155 }
3156
3157 char*
3158 kmap(KeySym k, uint state) {
3159 uint mask;
3160 Key *kp;
3161 int i;
3162
3163 /* Check for mapped keys out of X11 function keys. */
3164 for(i = 0; i < LEN(mappedkeys); i++) {
3165 if(mappedkeys[i] == k)
3166 break;
3167 }
3168 if(i == LEN(mappedkeys)) {
3169 if((k & 0xFFFF) < 0xFD00)
3170 return NULL;
3171 }
3172
3173 for(kp = key; kp < key + LEN(key); kp++) {
3174 mask = kp->mask;
3175
3176 if(kp->k != k)
3177 continue;
3178
3179 if(!match(mask, state))
3180 continue;
3181
3182 if(kp->appkey > 0) {
3183 if(!IS_SET(MODE_APPKEYPAD))
3184 continue;
3185 if(term.numlock && kp->appkey == 2)
3186 continue;
3187 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3188 continue;
3189 }
3190
3191 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3192 (kp->appcursor > 0
3193 && !IS_SET(MODE_APPCURSOR))) {
3194 continue;
3195 }
3196
3197 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3198 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3199 continue;
3200 }
3201
3202 return kp->s;
3203 }
3204
3205 return NULL;
3206 }
3207
3208 void
3209 kpress(XEvent *ev) {
3210 XKeyEvent *e = &ev->xkey;
3211 KeySym ksym;
3212 char xstr[31], buf[32], *customkey, *cp = buf;
3213 int len;
3214 Status status;
3215 Shortcut *bp;
3216
3217 if(IS_SET(MODE_KBDLOCK))
3218 return;
3219
3220 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3221 e->state &= ~Mod2Mask;
3222 /* 1. shortcuts */
3223 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3224 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3225 bp->func(&(bp->arg));
3226 return;
3227 }
3228 }
3229
3230 /* 2. custom keys from config.h */
3231 if((customkey = kmap(ksym, e->state))) {
3232 len = strlen(customkey);
3233 memcpy(buf, customkey, len);
3234 /* 2. hardcoded (overrides X lookup) */
3235 } else {
3236 if(len == 0)
3237 return;
3238
3239 if(len == 1 && e->state & Mod1Mask)
3240 *cp++ = '\033';
3241
3242 memcpy(cp, xstr, len);
3243 len = cp - buf + len;
3244 }
3245
3246 ttywrite(buf, len);
3247 if(IS_SET(MODE_ECHO))
3248 techo(buf, len);
3249 }
3250
3251
3252 void
3253 cmessage(XEvent *e) {
3254 /*
3255 * See xembed specs
3256 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3257 */
3258 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3259 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3260 xw.state |= WIN_FOCUSED;
3261 xseturgency(0);
3262 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3263 xw.state &= ~WIN_FOCUSED;
3264 }
3265 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3266 /* Send SIGHUP to shell */
3267 kill(pid, SIGHUP);
3268 exit(EXIT_SUCCESS);
3269 }
3270 }
3271
3272 void
3273 cresize(int width, int height) {
3274 int col, row;
3275
3276 if(width != 0)
3277 xw.w = width;
3278 if(height != 0)
3279 xw.h = height;
3280
3281 col = (xw.w - 2 * borderpx) / xw.cw;
3282 row = (xw.h - 2 * borderpx) / xw.ch;
3283
3284 tresize(col, row);
3285 xresize(col, row);
3286 ttyresize();
3287 }
3288
3289 void
3290 resize(XEvent *e) {
3291 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3292 return;
3293
3294 cresize(e->xconfigure.width, e->xconfigure.height);
3295 }
3296
3297 void
3298 run(void) {
3299 XEvent ev;
3300 fd_set rfd;
3301 int xfd = XConnectionNumber(xw.dpy), xev;
3302 struct timeval drawtimeout, *tv = NULL, now, last;
3303
3304 gettimeofday(&last, NULL);
3305
3306 for(xev = actionfps;;) {
3307 FD_ZERO(&rfd);
3308 FD_SET(cmdfd, &rfd);
3309 FD_SET(xfd, &rfd);
3310 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3311 if(errno == EINTR)
3312 continue;
3313 die("select failed: %s\n", SERRNO);
3314 }
3315
3316 gettimeofday(&now, NULL);
3317 drawtimeout.tv_sec = 0;
3318 drawtimeout.tv_usec = (1000/xfps) * 1000;
3319 tv = &drawtimeout;
3320
3321 if(FD_ISSET(cmdfd, &rfd))
3322 ttyread();
3323
3324 if(FD_ISSET(xfd, &rfd))
3325 xev = actionfps;
3326
3327 if(TIMEDIFF(now, last) > \
3328 (xev ? (1000/xfps) : (1000/actionfps))) {
3329 while(XPending(xw.dpy)) {
3330 XNextEvent(xw.dpy, &ev);
3331 if(XFilterEvent(&ev, None))
3332 continue;
3333 if(handler[ev.type])
3334 (handler[ev.type])(&ev);
3335 }
3336
3337 draw();
3338 XFlush(xw.dpy);
3339 last = now;
3340
3341 if(xev && !FD_ISSET(xfd, &rfd))
3342 xev--;
3343 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd))
3344 tv = NULL;
3345 }
3346 }
3347 }
3348
3349 void
3350 usage(void) {
3351 die("%s " VERSION " (c) 2010-2013 st engineers\n" \
3352 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3353 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3354 }
3355
3356 int
3357 main(int argc, char *argv[]) {
3358 int bitm, xr, yr;
3359 uint wr, hr;
3360
3361 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3362 xw.isfixed = False;
3363
3364 ARGBEGIN {
3365 case 'a':
3366 allowaltscreen = false;
3367 break;
3368 case 'c':
3369 opt_class = EARGF(usage());
3370 break;
3371 case 'e':
3372 /* eat all remaining arguments */
3373 if(argc > 1)
3374 opt_cmd = &argv[1];
3375 goto run;
3376 case 'f':
3377 opt_font = EARGF(usage());
3378 break;
3379 case 'g':
3380 bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
3381 if(bitm & XValue)
3382 xw.fx = xr;
3383 if(bitm & YValue)
3384 xw.fy = yr;
3385 if(bitm & WidthValue)
3386 xw.fw = (int)wr;
3387 if(bitm & HeightValue)
3388 xw.fh = (int)hr;
3389 if(bitm & XNegative && xw.fx == 0)
3390 xw.fx = -1;
3391 if(bitm & XNegative && xw.fy == 0)
3392 xw.fy = -1;
3393
3394 if(xw.fh != 0 && xw.fw != 0)
3395 xw.isfixed = True;
3396 break;
3397 case 'o':
3398 opt_io = EARGF(usage());
3399 break;
3400 case 't':
3401 opt_title = EARGF(usage());
3402 break;
3403 case 'w':
3404 opt_embed = EARGF(usage());
3405 break;
3406 case 'v':
3407 default:
3408 usage();
3409 } ARGEND;
3410
3411 run:
3412 setlocale(LC_CTYPE, "");
3413 XSetLocaleModifiers("");
3414 tnew(80, 24);
3415 xinit();
3416 ttynew();
3417 selinit();
3418 if(xw.isfixed)
3419 cresize(xw.h, xw.w);
3420 run();
3421
3422 return 0;
3423 }
3424