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