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Making the copy and pasting consistent.
[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, 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, is_selected = 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 is_selected = 0;
773 gp = &term.line[y][0];
774 last = gp + term.col;
775
776 while(--last >= gp && !(last->state & GLYPH_SET))
777 /* nothing */;
778
779 for(x = 0; gp <= last; x++, ++gp) {
780 if(!selected(x, y)) {
781 continue;
782 } else {
783 is_selected = 1;
784 }
785
786 p = (gp->state & GLYPH_SET) ? gp->c : " ";
787 size = utf8size(p);
788 memcpy(ptr, p, size);
789 ptr += size;
790 }
791
792 /*
793 * Copy and pasting of line endings is inconsistent
794 * in the inconsistent terminal and GUI world.
795 * The best solution seems like to produce '\n' when
796 * something is copied from st and convert '\n' to
797 * '\r', when something to be pasted is received by
798 * st.
799 * FIXME: Fix the computer world.
800 */
801 if(is_selected && y < sel.e.y)
802 *ptr++ = '\n';
803 }
804 *ptr = 0;
805 }
806 xsetsel(str);
807 }
808
809 void
810 selnotify(XEvent *e) {
811 ulong nitems, ofs, rem;
812 int format;
813 uchar *data, *last, *repl;
814 Atom type;
815
816 ofs = 0;
817 do {
818 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
819 False, AnyPropertyType, &type, &format,
820 &nitems, &rem, &data)) {
821 fprintf(stderr, "Clipboard allocation failed\n");
822 return;
823 }
824
825 /*
826 * As seen in selcopy:
827 * Line endings are inconsistent in the terminal and GUI world
828 * copy and pasting. When receiving some selection data,
829 * replace all '\n' with '\r'.
830 * FIXME: Fix the computer world.
831 */
832 repl = data;
833 last = data + nitems * format / 8;
834 while((repl = memchr(repl, '\n', last - repl))) {
835 *repl++ = '\r';
836 }
837
838 last = data + nitems * format / 8;
839 repl = data;
840
841
842 ttywrite((const char *)data, nitems * format / 8);
843 XFree(data);
844 /* number of 32-bit chunks returned */
845 ofs += nitems * format / 32;
846 } while(rem > 0);
847 }
848
849 void
850 selpaste(const Arg *dummy) {
851 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
852 xw.win, CurrentTime);
853 }
854
855 void
856 clippaste(const Arg *dummy) {
857 Atom clipboard;
858
859 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
860 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
861 xw.win, CurrentTime);
862 }
863
864 void
865 selclear(XEvent *e) {
866 if(sel.bx == -1)
867 return;
868 sel.bx = -1;
869 tsetdirt(sel.b.y, sel.e.y);
870 }
871
872 void
873 selrequest(XEvent *e) {
874 XSelectionRequestEvent *xsre;
875 XSelectionEvent xev;
876 Atom xa_targets, string;
877
878 xsre = (XSelectionRequestEvent *) e;
879 xev.type = SelectionNotify;
880 xev.requestor = xsre->requestor;
881 xev.selection = xsre->selection;
882 xev.target = xsre->target;
883 xev.time = xsre->time;
884 /* reject */
885 xev.property = None;
886
887 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
888 if(xsre->target == xa_targets) {
889 /* respond with the supported type */
890 string = sel.xtarget;
891 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
892 XA_ATOM, 32, PropModeReplace,
893 (uchar *) &string, 1);
894 xev.property = xsre->property;
895 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
896 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
897 xsre->target, 8, PropModeReplace,
898 (uchar *) sel.clip, strlen(sel.clip));
899 xev.property = xsre->property;
900 }
901
902 /* all done, send a notification to the listener */
903 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
904 fprintf(stderr, "Error sending SelectionNotify event\n");
905 }
906
907 void
908 xsetsel(char *str) {
909 /* register the selection for both the clipboard and the primary */
910 Atom clipboard;
911
912 free(sel.clip);
913 sel.clip = str;
914
915 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
916
917 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
918 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
919 }
920
921 void
922 brelease(XEvent *e) {
923 struct timeval now;
924
925 if(IS_SET(MODE_MOUSE)) {
926 mousereport(e);
927 return;
928 }
929
930 if(e->xbutton.button == Button2) {
931 selpaste(NULL);
932 } else if(e->xbutton.button == Button1) {
933 sel.mode = 0;
934 getbuttoninfo(e);
935 term.dirty[sel.ey] = 1;
936 if(sel.bx == sel.ex && sel.by == sel.ey) {
937 sel.bx = -1;
938 gettimeofday(&now, NULL);
939
940 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
941 /* triple click on the line */
942 sel.b.x = sel.bx = 0;
943 sel.e.x = sel.ex = term.col;
944 sel.b.y = sel.e.y = sel.ey;
945 selcopy();
946 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
947 /* double click to select word */
948 sel.bx = sel.ex;
949 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
950 term.line[sel.ey][sel.bx-1].c[0] != ' ') {
951 sel.bx--;
952 }
953 sel.b.x = sel.bx;
954 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
955 term.line[sel.ey][sel.ex+1].c[0] != ' ') {
956 sel.ex++;
957 }
958 sel.e.x = sel.ex;
959 sel.b.y = sel.e.y = sel.ey;
960 selcopy();
961 }
962 } else {
963 selcopy();
964 }
965 }
966
967 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
968 gettimeofday(&sel.tclick1, NULL);
969 }
970
971 void
972 bmotion(XEvent *e) {
973 int oldey, oldex, oldsby, oldsey;
974
975 if(IS_SET(MODE_MOUSE)) {
976 mousereport(e);
977 return;
978 }
979
980 if(!sel.mode)
981 return;
982
983 oldey = sel.ey;
984 oldex = sel.ex;
985 oldsby = sel.b.y;
986 oldsey = sel.e.y;
987 getbuttoninfo(e);
988
989 if(oldey != sel.ey || oldex != sel.ex) {
990 tsetdirt(MIN(sel.b.y, oldsby), MAX(sel.e.y, oldsey));
991 }
992 }
993
994 void
995 die(const char *errstr, ...) {
996 va_list ap;
997
998 va_start(ap, errstr);
999 vfprintf(stderr, errstr, ap);
1000 va_end(ap);
1001 exit(EXIT_FAILURE);
1002 }
1003
1004 void
1005 execsh(void) {
1006 char **args;
1007 char *envshell = getenv("SHELL");
1008 const struct passwd *pass = getpwuid(getuid());
1009 char buf[sizeof(long) * 8 + 1];
1010
1011 unsetenv("COLUMNS");
1012 unsetenv("LINES");
1013 unsetenv("TERMCAP");
1014
1015 if(pass) {
1016 setenv("LOGNAME", pass->pw_name, 1);
1017 setenv("USER", pass->pw_name, 1);
1018 setenv("SHELL", pass->pw_shell, 0);
1019 setenv("HOME", pass->pw_dir, 0);
1020 }
1021
1022 snprintf(buf, sizeof(buf), "%lu", xw.win);
1023 setenv("WINDOWID", buf, 1);
1024
1025 signal(SIGCHLD, SIG_DFL);
1026 signal(SIGHUP, SIG_DFL);
1027 signal(SIGINT, SIG_DFL);
1028 signal(SIGQUIT, SIG_DFL);
1029 signal(SIGTERM, SIG_DFL);
1030 signal(SIGALRM, SIG_DFL);
1031
1032 DEFAULT(envshell, shell);
1033 setenv("TERM", termname, 1);
1034 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1035 execvp(args[0], args);
1036 exit(EXIT_FAILURE);
1037 }
1038
1039 void
1040 sigchld(int a) {
1041 int stat = 0;
1042
1043 if(waitpid(pid, &stat, 0) < 0)
1044 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1045
1046 if(WIFEXITED(stat)) {
1047 exit(WEXITSTATUS(stat));
1048 } else {
1049 exit(EXIT_FAILURE);
1050 }
1051 }
1052
1053 void
1054 ttynew(void) {
1055 int m, s;
1056 struct winsize w = {term.row, term.col, 0, 0};
1057
1058 /* seems to work fine on linux, openbsd and freebsd */
1059 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1060 die("openpty failed: %s\n", SERRNO);
1061
1062 switch(pid = fork()) {
1063 case -1:
1064 die("fork failed\n");
1065 break;
1066 case 0:
1067 setsid(); /* create a new process group */
1068 dup2(s, STDIN_FILENO);
1069 dup2(s, STDOUT_FILENO);
1070 dup2(s, STDERR_FILENO);
1071 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1072 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1073 close(s);
1074 close(m);
1075 execsh();
1076 break;
1077 default:
1078 close(s);
1079 cmdfd = m;
1080 signal(SIGCHLD, sigchld);
1081 if(opt_io) {
1082 iofd = (!strcmp(opt_io, "-")) ?
1083 STDOUT_FILENO :
1084 open(opt_io, O_WRONLY | O_CREAT, 0666);
1085 if(iofd < 0) {
1086 fprintf(stderr, "Error opening %s:%s\n",
1087 opt_io, strerror(errno));
1088 }
1089 }
1090 }
1091 }
1092
1093 void
1094 dump(char c) {
1095 static int col;
1096
1097 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1098 if(++col % 10 == 0)
1099 fprintf(stderr, "\n");
1100 }
1101
1102 void
1103 ttyread(void) {
1104 static char buf[BUFSIZ];
1105 static int buflen = 0;
1106 char *ptr;
1107 char s[UTF_SIZ];
1108 int charsize; /* size of utf8 char in bytes */
1109 long utf8c;
1110 int ret;
1111
1112 /* append read bytes to unprocessed bytes */
1113 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1114 die("Couldn't read from shell: %s\n", SERRNO);
1115
1116 /* process every complete utf8 char */
1117 buflen += ret;
1118 ptr = buf;
1119 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1120 charsize = utf8decode(ptr, &utf8c);
1121 utf8encode(&utf8c, s);
1122 tputc(s, charsize);
1123 ptr += charsize;
1124 buflen -= charsize;
1125 }
1126
1127 /* keep any uncomplete utf8 char for the next call */
1128 memmove(buf, ptr, buflen);
1129 }
1130
1131 void
1132 ttywrite(const char *s, size_t n) {
1133 if(write(cmdfd, s, n) == -1)
1134 die("write error on tty: %s\n", SERRNO);
1135 }
1136
1137 void
1138 ttyresize(void) {
1139 struct winsize w;
1140
1141 w.ws_row = term.row;
1142 w.ws_col = term.col;
1143 w.ws_xpixel = xw.tw;
1144 w.ws_ypixel = xw.th;
1145 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1146 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1147 }
1148
1149 void
1150 tsetdirt(int top, int bot) {
1151 int i;
1152
1153 LIMIT(top, 0, term.row-1);
1154 LIMIT(bot, 0, term.row-1);
1155
1156 for(i = top; i <= bot; i++)
1157 term.dirty[i] = 1;
1158 }
1159
1160 void
1161 tfulldirt(void) {
1162 tsetdirt(0, term.row-1);
1163 }
1164
1165 void
1166 tcursor(int mode) {
1167 static TCursor c;
1168
1169 if(mode == CURSOR_SAVE) {
1170 c = term.c;
1171 } else if(mode == CURSOR_LOAD) {
1172 term.c = c;
1173 tmoveto(c.x, c.y);
1174 }
1175 }
1176
1177 void
1178 treset(void) {
1179 uint i;
1180
1181 term.c = (TCursor){{
1182 .mode = ATTR_NULL,
1183 .fg = defaultfg,
1184 .bg = defaultbg
1185 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1186
1187 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1188 for(i = tabspaces; i < term.col; i += tabspaces)
1189 term.tabs[i] = 1;
1190 term.top = 0;
1191 term.bot = term.row - 1;
1192 term.mode = MODE_WRAP;
1193
1194 tclearregion(0, 0, term.col-1, term.row-1, 0);
1195 tmoveto(0, 0);
1196 tcursor(CURSOR_SAVE);
1197 }
1198
1199 void
1200 tnew(int col, int row) {
1201 /* set screen size */
1202 term.row = row;
1203 term.col = col;
1204 term.line = xmalloc(term.row * sizeof(Line));
1205 term.alt = xmalloc(term.row * sizeof(Line));
1206 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
1207 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
1208
1209 for(row = 0; row < term.row; row++) {
1210 term.line[row] = xmalloc(term.col * sizeof(Glyph));
1211 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
1212 term.dirty[row] = 0;
1213 }
1214
1215 term.numlock = 1;
1216 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1217 /* setup screen */
1218 treset();
1219 }
1220
1221 void
1222 tswapscreen(void) {
1223 Line *tmp = term.line;
1224
1225 term.line = term.alt;
1226 term.alt = tmp;
1227 term.mode ^= MODE_ALTSCREEN;
1228 tfulldirt();
1229 }
1230
1231 void
1232 tscrolldown(int orig, int n) {
1233 int i;
1234 Line temp;
1235
1236 LIMIT(n, 0, term.bot-orig+1);
1237
1238 tclearregion(0, term.bot-n+1, term.col-1, term.bot, 0);
1239
1240 for(i = term.bot; i >= orig+n; i--) {
1241 temp = term.line[i];
1242 term.line[i] = term.line[i-n];
1243 term.line[i-n] = temp;
1244
1245 term.dirty[i] = 1;
1246 term.dirty[i-n] = 1;
1247 }
1248
1249 selscroll(orig, n);
1250 }
1251
1252 void
1253 tscrollup(int orig, int n) {
1254 int i;
1255 Line temp;
1256 LIMIT(n, 0, term.bot-orig+1);
1257
1258 tclearregion(0, orig, term.col-1, orig+n-1, 0);
1259
1260 for(i = orig; i <= term.bot-n; i++) {
1261 temp = term.line[i];
1262 term.line[i] = term.line[i+n];
1263 term.line[i+n] = temp;
1264
1265 term.dirty[i] = 1;
1266 term.dirty[i+n] = 1;
1267 }
1268
1269 selscroll(orig, -n);
1270 }
1271
1272 void
1273 selscroll(int orig, int n) {
1274 if(sel.bx == -1)
1275 return;
1276
1277 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1278 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1279 sel.bx = -1;
1280 return;
1281 }
1282 if(sel.type == SEL_RECTANGULAR) {
1283 if(sel.by < term.top)
1284 sel.by = term.top;
1285 if(sel.ey > term.bot)
1286 sel.ey = term.bot;
1287 } else {
1288 if(sel.by < term.top) {
1289 sel.by = term.top;
1290 sel.bx = 0;
1291 }
1292 if(sel.ey > term.bot) {
1293 sel.ey = term.bot;
1294 sel.ex = term.col;
1295 }
1296 }
1297 sel.b.y = sel.by, sel.b.x = sel.bx;
1298 sel.e.y = sel.ey, sel.e.x = sel.ex;
1299 }
1300 }
1301
1302 void
1303 tnewline(int first_col) {
1304 int y = term.c.y;
1305
1306 if(y == term.bot) {
1307 tscrollup(term.top, 1);
1308 } else {
1309 y++;
1310 }
1311 tmoveto(first_col ? 0 : term.c.x, y);
1312 }
1313
1314 void
1315 csiparse(void) {
1316 char *p = csiescseq.buf, *np;
1317 long int v;
1318
1319 csiescseq.narg = 0;
1320 if(*p == '?') {
1321 csiescseq.priv = 1;
1322 p++;
1323 }
1324
1325 csiescseq.buf[csiescseq.len] = '\0';
1326 while(p < csiescseq.buf+csiescseq.len) {
1327 np = NULL;
1328 v = strtol(p, &np, 10);
1329 if(np == p)
1330 v = 0;
1331 if(v == LONG_MAX || v == LONG_MIN)
1332 v = -1;
1333 csiescseq.arg[csiescseq.narg++] = v;
1334 p = np;
1335 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1336 break;
1337 p++;
1338 }
1339 csiescseq.mode = *p;
1340 }
1341
1342 /* for absolute user moves, when decom is set */
1343 void
1344 tmoveato(int x, int y) {
1345 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1346 }
1347
1348 void
1349 tmoveto(int x, int y) {
1350 int miny, maxy;
1351
1352 if(term.c.state & CURSOR_ORIGIN) {
1353 miny = term.top;
1354 maxy = term.bot;
1355 } else {
1356 miny = 0;
1357 maxy = term.row - 1;
1358 }
1359 LIMIT(x, 0, term.col-1);
1360 LIMIT(y, miny, maxy);
1361 term.c.state &= ~CURSOR_WRAPNEXT;
1362 term.c.x = x;
1363 term.c.y = y;
1364 }
1365
1366 void
1367 tsetchar(char *c, Glyph *attr, int x, int y) {
1368 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1369 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1370 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1371 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1372 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1373 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1374 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1375 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1376 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1377 };
1378
1379 /*
1380 * The table is proudly stolen from rxvt.
1381 */
1382 if(attr->mode & ATTR_GFX) {
1383 if(c[0] >= 0x41 && c[0] <= 0x7e
1384 && vt100_0[c[0] - 0x41]) {
1385 c = vt100_0[c[0] - 0x41];
1386 }
1387 }
1388
1389 term.dirty[y] = 1;
1390 term.line[y][x] = *attr;
1391 memcpy(term.line[y][x].c, c, UTF_SIZ);
1392 term.line[y][x].state |= GLYPH_SET;
1393 }
1394
1395 void
1396 tclearregion(int x1, int y1, int x2, int y2, int bce) {
1397 int x, y, temp;
1398
1399 if(x1 > x2)
1400 temp = x1, x1 = x2, x2 = temp;
1401 if(y1 > y2)
1402 temp = y1, y1 = y2, y2 = temp;
1403
1404 LIMIT(x1, 0, term.col-1);
1405 LIMIT(x2, 0, term.col-1);
1406 LIMIT(y1, 0, term.row-1);
1407 LIMIT(y2, 0, term.row-1);
1408
1409 for(y = y1; y <= y2; y++) {
1410 term.dirty[y] = 1;
1411 for(x = x1; x <= x2; x++) {
1412 if(bce) {
1413 term.line[y][x] = term.c.attr;
1414 memcpy(term.line[y][x].c, " ", 2);
1415 term.line[y][x].state |= GLYPH_SET;
1416 } else {
1417 term.line[y][x].state = 0;
1418 }
1419 }
1420 }
1421 }
1422
1423 void
1424 tdeletechar(int n) {
1425 int src = term.c.x + n;
1426 int dst = term.c.x;
1427 int size = term.col - src;
1428
1429 term.dirty[term.c.y] = 1;
1430
1431 if(src >= term.col) {
1432 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1433 return;
1434 }
1435
1436 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1437 size * sizeof(Glyph));
1438 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y, 0);
1439 }
1440
1441 void
1442 tinsertblank(int n) {
1443 int src = term.c.x;
1444 int dst = src + n;
1445 int size = term.col - dst;
1446
1447 term.dirty[term.c.y] = 1;
1448
1449 if(dst >= term.col) {
1450 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1451 return;
1452 }
1453
1454 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1455 size * sizeof(Glyph));
1456 tclearregion(src, term.c.y, dst - 1, term.c.y, 0);
1457 }
1458
1459 void
1460 tinsertblankline(int n) {
1461 if(term.c.y < term.top || term.c.y > term.bot)
1462 return;
1463
1464 tscrolldown(term.c.y, n);
1465 }
1466
1467 void
1468 tdeleteline(int n) {
1469 if(term.c.y < term.top || term.c.y > term.bot)
1470 return;
1471
1472 tscrollup(term.c.y, n);
1473 }
1474
1475 void
1476 tsetattr(int *attr, int l) {
1477 int i;
1478
1479 for(i = 0; i < l; i++) {
1480 switch(attr[i]) {
1481 case 0:
1482 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1483 | ATTR_ITALIC | ATTR_BLINK);
1484 term.c.attr.fg = defaultfg;
1485 term.c.attr.bg = defaultbg;
1486 break;
1487 case 1:
1488 term.c.attr.mode |= ATTR_BOLD;
1489 break;
1490 case 3:
1491 term.c.attr.mode |= ATTR_ITALIC;
1492 break;
1493 case 4:
1494 term.c.attr.mode |= ATTR_UNDERLINE;
1495 break;
1496 case 5: /* slow blink */
1497 case 6: /* rapid blink */
1498 term.c.attr.mode |= ATTR_BLINK;
1499 break;
1500 case 7:
1501 term.c.attr.mode |= ATTR_REVERSE;
1502 break;
1503 case 21:
1504 case 22:
1505 term.c.attr.mode &= ~ATTR_BOLD;
1506 break;
1507 case 23:
1508 term.c.attr.mode &= ~ATTR_ITALIC;
1509 break;
1510 case 24:
1511 term.c.attr.mode &= ~ATTR_UNDERLINE;
1512 break;
1513 case 25:
1514 case 26:
1515 term.c.attr.mode &= ~ATTR_BLINK;
1516 break;
1517 case 27:
1518 term.c.attr.mode &= ~ATTR_REVERSE;
1519 break;
1520 case 38:
1521 if(i + 2 < l && attr[i + 1] == 5) {
1522 i += 2;
1523 if(BETWEEN(attr[i], 0, 255)) {
1524 term.c.attr.fg = attr[i];
1525 } else {
1526 fprintf(stderr,
1527 "erresc: bad fgcolor %d\n",
1528 attr[i]);
1529 }
1530 } else {
1531 fprintf(stderr,
1532 "erresc(38): gfx attr %d unknown\n",
1533 attr[i]);
1534 }
1535 break;
1536 case 39:
1537 term.c.attr.fg = defaultfg;
1538 break;
1539 case 48:
1540 if(i + 2 < l && attr[i + 1] == 5) {
1541 i += 2;
1542 if(BETWEEN(attr[i], 0, 255)) {
1543 term.c.attr.bg = attr[i];
1544 } else {
1545 fprintf(stderr,
1546 "erresc: bad bgcolor %d\n",
1547 attr[i]);
1548 }
1549 } else {
1550 fprintf(stderr,
1551 "erresc(48): gfx attr %d unknown\n",
1552 attr[i]);
1553 }
1554 break;
1555 case 49:
1556 term.c.attr.bg = defaultbg;
1557 break;
1558 default:
1559 if(BETWEEN(attr[i], 30, 37)) {
1560 term.c.attr.fg = attr[i] - 30;
1561 } else if(BETWEEN(attr[i], 40, 47)) {
1562 term.c.attr.bg = attr[i] - 40;
1563 } else if(BETWEEN(attr[i], 90, 97)) {
1564 term.c.attr.fg = attr[i] - 90 + 8;
1565 } else if(BETWEEN(attr[i], 100, 107)) {
1566 term.c.attr.bg = attr[i] - 100 + 8;
1567 } else {
1568 fprintf(stderr,
1569 "erresc(default): gfx attr %d unknown\n",
1570 attr[i]), csidump();
1571 }
1572 break;
1573 }
1574 }
1575 }
1576
1577 void
1578 tsetscroll(int t, int b) {
1579 int temp;
1580
1581 LIMIT(t, 0, term.row-1);
1582 LIMIT(b, 0, term.row-1);
1583 if(t > b) {
1584 temp = t;
1585 t = b;
1586 b = temp;
1587 }
1588 term.top = t;
1589 term.bot = b;
1590 }
1591
1592 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1593
1594 void
1595 tsetmode(bool priv, bool set, int *args, int narg) {
1596 int *lim, mode;
1597 bool alt;
1598
1599 for(lim = args + narg; args < lim; ++args) {
1600 if(priv) {
1601 switch(*args) {
1602 break;
1603 case 1: /* DECCKM -- Cursor key */
1604 MODBIT(term.mode, set, MODE_APPCURSOR);
1605 break;
1606 case 5: /* DECSCNM -- Reverse video */
1607 mode = term.mode;
1608 MODBIT(term.mode, set, MODE_REVERSE);
1609 if(mode != term.mode)
1610 redraw(REDRAW_TIMEOUT);
1611 break;
1612 case 6: /* DECOM -- Origin */
1613 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1614 tmoveato(0, 0);
1615 break;
1616 case 7: /* DECAWM -- Auto wrap */
1617 MODBIT(term.mode, set, MODE_WRAP);
1618 break;
1619 case 0: /* Error (IGNORED) */
1620 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1621 case 3: /* DECCOLM -- Column (IGNORED) */
1622 case 4: /* DECSCLM -- Scroll (IGNORED) */
1623 case 8: /* DECARM -- Auto repeat (IGNORED) */
1624 case 18: /* DECPFF -- Printer feed (IGNORED) */
1625 case 19: /* DECPEX -- Printer extent (IGNORED) */
1626 case 42: /* DECNRCM -- National characters (IGNORED) */
1627 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1628 break;
1629 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1630 MODBIT(term.mode, !set, MODE_HIDE);
1631 break;
1632 case 1000: /* 1000,1002: enable xterm mouse report */
1633 MODBIT(term.mode, set, MODE_MOUSEBTN);
1634 MODBIT(term.mode, 0, MODE_MOUSEMOTION);
1635 break;
1636 case 1002:
1637 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1638 MODBIT(term.mode, 0, MODE_MOUSEBTN);
1639 break;
1640 case 1006:
1641 MODBIT(term.mode, set, MODE_MOUSESGR);
1642 break;
1643 case 1049: /* = 1047 and 1048 */
1644 case 47:
1645 case 1047:
1646 if (!allowaltscreen)
1647 break;
1648
1649 alt = IS_SET(MODE_ALTSCREEN);
1650 if(alt) {
1651 tclearregion(0, 0, term.col-1,
1652 term.row-1, 0);
1653 }
1654 if(set ^ alt) /* set is always 1 or 0 */
1655 tswapscreen();
1656 if(*args != 1049)
1657 break;
1658 /* FALLTRU */
1659 case 1048:
1660 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1661 break;
1662 default:
1663 fprintf(stderr,
1664 "erresc: unknown private set/reset mode %d\n",
1665 *args);
1666 break;
1667 }
1668 } else {
1669 switch(*args) {
1670 case 0: /* Error (IGNORED) */
1671 break;
1672 case 2: /* KAM -- keyboard action */
1673 MODBIT(term.mode, set, MODE_KBDLOCK);
1674 break;
1675 case 4: /* IRM -- Insertion-replacement */
1676 MODBIT(term.mode, set, MODE_INSERT);
1677 break;
1678 case 12: /* SRM -- Send/Receive */
1679 MODBIT(term.mode, !set, MODE_ECHO);
1680 break;
1681 case 20: /* LNM -- Linefeed/new line */
1682 MODBIT(term.mode, set, MODE_CRLF);
1683 break;
1684 default:
1685 fprintf(stderr,
1686 "erresc: unknown set/reset mode %d\n",
1687 *args);
1688 break;
1689 }
1690 }
1691 }
1692 }
1693 #undef MODBIT
1694
1695
1696 void
1697 csihandle(void) {
1698 switch(csiescseq.mode) {
1699 default:
1700 unknown:
1701 fprintf(stderr, "erresc: unknown csi ");
1702 csidump();
1703 /* die(""); */
1704 break;
1705 case '@': /* ICH -- Insert <n> blank char */
1706 DEFAULT(csiescseq.arg[0], 1);
1707 tinsertblank(csiescseq.arg[0]);
1708 break;
1709 case 'A': /* CUU -- Cursor <n> Up */
1710 DEFAULT(csiescseq.arg[0], 1);
1711 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1712 break;
1713 case 'B': /* CUD -- Cursor <n> Down */
1714 case 'e': /* VPR --Cursor <n> Down */
1715 DEFAULT(csiescseq.arg[0], 1);
1716 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1717 break;
1718 case 'c': /* DA -- Device Attributes */
1719 if(csiescseq.arg[0] == 0)
1720 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1721 break;
1722 case 'C': /* CUF -- Cursor <n> Forward */
1723 case 'a': /* HPR -- Cursor <n> Forward */
1724 DEFAULT(csiescseq.arg[0], 1);
1725 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1726 break;
1727 case 'D': /* CUB -- Cursor <n> Backward */
1728 DEFAULT(csiescseq.arg[0], 1);
1729 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1730 break;
1731 case 'E': /* CNL -- Cursor <n> Down and first col */
1732 DEFAULT(csiescseq.arg[0], 1);
1733 tmoveto(0, term.c.y+csiescseq.arg[0]);
1734 break;
1735 case 'F': /* CPL -- Cursor <n> Up and first col */
1736 DEFAULT(csiescseq.arg[0], 1);
1737 tmoveto(0, term.c.y-csiescseq.arg[0]);
1738 break;
1739 case 'g': /* TBC -- Tabulation clear */
1740 switch(csiescseq.arg[0]) {
1741 case 0: /* clear current tab stop */
1742 term.tabs[term.c.x] = 0;
1743 break;
1744 case 3: /* clear all the tabs */
1745 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1746 break;
1747 default:
1748 goto unknown;
1749 }
1750 break;
1751 case 'G': /* CHA -- Move to <col> */
1752 case '`': /* HPA */
1753 DEFAULT(csiescseq.arg[0], 1);
1754 tmoveto(csiescseq.arg[0]-1, term.c.y);
1755 break;
1756 case 'H': /* CUP -- Move to <row> <col> */
1757 case 'f': /* HVP */
1758 DEFAULT(csiescseq.arg[0], 1);
1759 DEFAULT(csiescseq.arg[1], 1);
1760 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1761 break;
1762 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1763 DEFAULT(csiescseq.arg[0], 1);
1764 while(csiescseq.arg[0]--)
1765 tputtab(1);
1766 break;
1767 case 'J': /* ED -- Clear screen */
1768 sel.bx = -1;
1769 switch(csiescseq.arg[0]) {
1770 case 0: /* below */
1771 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 1);
1772 if(term.c.y < term.row-1) {
1773 tclearregion(0, term.c.y+1, term.col-1,
1774 term.row-1, 1);
1775 }
1776 break;
1777 case 1: /* above */
1778 if(term.c.y > 1)
1779 tclearregion(0, 0, term.col-1, term.c.y-1, 1);
1780 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1781 break;
1782 case 2: /* all */
1783 tclearregion(0, 0, term.col-1, term.row-1, 1);
1784 break;
1785 default:
1786 goto unknown;
1787 }
1788 break;
1789 case 'K': /* EL -- Clear line */
1790 switch(csiescseq.arg[0]) {
1791 case 0: /* right */
1792 tclearregion(term.c.x, term.c.y, term.col-1,
1793 term.c.y, 1);
1794 break;
1795 case 1: /* left */
1796 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1797 break;
1798 case 2: /* all */
1799 tclearregion(0, term.c.y, term.col-1, term.c.y, 1);
1800 break;
1801 }
1802 break;
1803 case 'S': /* SU -- Scroll <n> line up */
1804 DEFAULT(csiescseq.arg[0], 1);
1805 tscrollup(term.top, csiescseq.arg[0]);
1806 break;
1807 case 'T': /* SD -- Scroll <n> line down */
1808 DEFAULT(csiescseq.arg[0], 1);
1809 tscrolldown(term.top, csiescseq.arg[0]);
1810 break;
1811 case 'L': /* IL -- Insert <n> blank lines */
1812 DEFAULT(csiescseq.arg[0], 1);
1813 tinsertblankline(csiescseq.arg[0]);
1814 break;
1815 case 'l': /* RM -- Reset Mode */
1816 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1817 break;
1818 case 'M': /* DL -- Delete <n> lines */
1819 DEFAULT(csiescseq.arg[0], 1);
1820 tdeleteline(csiescseq.arg[0]);
1821 break;
1822 case 'X': /* ECH -- Erase <n> char */
1823 DEFAULT(csiescseq.arg[0], 1);
1824 tclearregion(term.c.x, term.c.y,
1825 term.c.x + csiescseq.arg[0] - 1, term.c.y, 1);
1826 break;
1827 case 'P': /* DCH -- Delete <n> char */
1828 DEFAULT(csiescseq.arg[0], 1);
1829 tdeletechar(csiescseq.arg[0]);
1830 break;
1831 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1832 DEFAULT(csiescseq.arg[0], 1);
1833 while(csiescseq.arg[0]--)
1834 tputtab(0);
1835 break;
1836 case 'd': /* VPA -- Move to <row> */
1837 DEFAULT(csiescseq.arg[0], 1);
1838 tmoveato(term.c.x, csiescseq.arg[0]-1);
1839 break;
1840 case 'h': /* SM -- Set terminal mode */
1841 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1842 break;
1843 case 'm': /* SGR -- Terminal attribute (color) */
1844 tsetattr(csiescseq.arg, csiescseq.narg);
1845 break;
1846 case 'r': /* DECSTBM -- Set Scrolling Region */
1847 if(csiescseq.priv) {
1848 goto unknown;
1849 } else {
1850 DEFAULT(csiescseq.arg[0], 1);
1851 DEFAULT(csiescseq.arg[1], term.row);
1852 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1853 tmoveato(0, 0);
1854 }
1855 break;
1856 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1857 tcursor(CURSOR_SAVE);
1858 break;
1859 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1860 tcursor(CURSOR_LOAD);
1861 break;
1862 }
1863 }
1864
1865 void
1866 csidump(void) {
1867 int i;
1868 uint c;
1869
1870 printf("ESC[");
1871 for(i = 0; i < csiescseq.len; i++) {
1872 c = csiescseq.buf[i] & 0xff;
1873 if(isprint(c)) {
1874 putchar(c);
1875 } else if(c == '\n') {
1876 printf("(\\n)");
1877 } else if(c == '\r') {
1878 printf("(\\r)");
1879 } else if(c == 0x1b) {
1880 printf("(\\e)");
1881 } else {
1882 printf("(%02x)", c);
1883 }
1884 }
1885 putchar('\n');
1886 }
1887
1888 void
1889 csireset(void) {
1890 memset(&csiescseq, 0, sizeof(csiescseq));
1891 }
1892
1893 void
1894 strhandle(void) {
1895 char *p = NULL;
1896 int i, j, narg;
1897
1898 strparse();
1899 narg = strescseq.narg;
1900
1901 switch(strescseq.type) {
1902 case ']': /* OSC -- Operating System Command */
1903 switch(i = atoi(strescseq.args[0])) {
1904 case 0:
1905 case 1:
1906 case 2:
1907 if(narg > 1)
1908 xsettitle(strescseq.args[1]);
1909 break;
1910 case 4: /* color set */
1911 if(narg < 3)
1912 break;
1913 p = strescseq.args[2];
1914 /* fall through */
1915 case 104: /* color reset, here p = NULL */
1916 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
1917 if (!xsetcolorname(j, p)) {
1918 fprintf(stderr, "erresc: invalid color %s\n", p);
1919 } else {
1920 /*
1921 * TODO if defaultbg color is changed, borders
1922 * are dirty
1923 */
1924 redraw(0);
1925 }
1926 break;
1927 default:
1928 fprintf(stderr, "erresc: unknown str ");
1929 strdump();
1930 break;
1931 }
1932 break;
1933 case 'k': /* old title set compatibility */
1934 xsettitle(strescseq.args[0]);
1935 break;
1936 case 'P': /* DSC -- Device Control String */
1937 case '_': /* APC -- Application Program Command */
1938 case '^': /* PM -- Privacy Message */
1939 default:
1940 fprintf(stderr, "erresc: unknown str ");
1941 strdump();
1942 /* die(""); */
1943 break;
1944 }
1945 }
1946
1947 void
1948 strparse(void) {
1949 char *p = strescseq.buf;
1950
1951 strescseq.narg = 0;
1952 strescseq.buf[strescseq.len] = '\0';
1953 while(p && strescseq.narg < STR_ARG_SIZ)
1954 strescseq.args[strescseq.narg++] = strsep(&p, ";");
1955 }
1956
1957 void
1958 strdump(void) {
1959 int i;
1960 uint c;
1961
1962 printf("ESC%c", strescseq.type);
1963 for(i = 0; i < strescseq.len; i++) {
1964 c = strescseq.buf[i] & 0xff;
1965 if(c == '\0') {
1966 return;
1967 } else if(isprint(c)) {
1968 putchar(c);
1969 } else if(c == '\n') {
1970 printf("(\\n)");
1971 } else if(c == '\r') {
1972 printf("(\\r)");
1973 } else if(c == 0x1b) {
1974 printf("(\\e)");
1975 } else {
1976 printf("(%02x)", c);
1977 }
1978 }
1979 printf("ESC\\\n");
1980 }
1981
1982 void
1983 strreset(void) {
1984 memset(&strescseq, 0, sizeof(strescseq));
1985 }
1986
1987 void
1988 tputtab(bool forward) {
1989 uint x = term.c.x;
1990
1991 if(forward) {
1992 if(x == term.col)
1993 return;
1994 for(++x; x < term.col && !term.tabs[x]; ++x)
1995 /* nothing */ ;
1996 } else {
1997 if(x == 0)
1998 return;
1999 for(--x; x > 0 && !term.tabs[x]; --x)
2000 /* nothing */ ;
2001 }
2002 tmoveto(x, term.c.y);
2003 }
2004
2005 void
2006 techo(char *buf, int len) {
2007 for(; len > 0; buf++, len--) {
2008 char c = *buf;
2009
2010 if(c == '\033') { /* escape */
2011 tputc("^", 1);
2012 tputc("[", 1);
2013 } else if(c < '\x20') { /* control code */
2014 if(c != '\n' && c != '\r' && c != '\t') {
2015 c |= '\x40';
2016 tputc("^", 1);
2017 }
2018 tputc(&c, 1);
2019 } else {
2020 break;
2021 }
2022 }
2023 if(len)
2024 tputc(buf, len);
2025 }
2026
2027 void
2028 tputc(char *c, int len) {
2029 uchar ascii = *c;
2030 bool control = ascii < '\x20' || ascii == 0177;
2031
2032 if(iofd != -1) {
2033 if(xwrite(iofd, c, len) < 0) {
2034 fprintf(stderr, "Error writing in %s:%s\n",
2035 opt_io, strerror(errno));
2036 close(iofd);
2037 iofd = -1;
2038 }
2039 }
2040
2041 /*
2042 * STR sequences must be checked before anything else
2043 * because it can use some control codes as part of the sequence.
2044 */
2045 if(term.esc & ESC_STR) {
2046 switch(ascii) {
2047 case '\033':
2048 term.esc = ESC_START | ESC_STR_END;
2049 break;
2050 case '\a': /* backwards compatibility to xterm */
2051 term.esc = 0;
2052 strhandle();
2053 break;
2054 default:
2055 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2056 memmove(&strescseq.buf[strescseq.len], c, len);
2057 strescseq.len += len;
2058 } else {
2059 /*
2060 * Here is a bug in terminals. If the user never sends
2061 * some code to stop the str or esc command, then st
2062 * will stop responding. But this is better than
2063 * silently failing with unknown characters. At least
2064 * then users will report back.
2065 *
2066 * In the case users ever get fixed, here is the code:
2067 */
2068 /*
2069 * term.esc = 0;
2070 * strhandle();
2071 */
2072 }
2073 }
2074 return;
2075 }
2076
2077 /*
2078 * Actions of control codes must be performed as soon they arrive
2079 * because they can be embedded inside a control sequence, and
2080 * they must not cause conflicts with sequences.
2081 */
2082 if(control) {
2083 switch(ascii) {
2084 case '\t': /* HT */
2085 tputtab(1);
2086 return;
2087 case '\b': /* BS */
2088 tmoveto(term.c.x-1, term.c.y);
2089 return;
2090 case '\r': /* CR */
2091 tmoveto(0, term.c.y);
2092 return;
2093 case '\f': /* LF */
2094 case '\v': /* VT */
2095 case '\n': /* LF */
2096 /* go to first col if the mode is set */
2097 tnewline(IS_SET(MODE_CRLF));
2098 return;
2099 case '\a': /* BEL */
2100 if(!(xw.state & WIN_FOCUSED))
2101 xseturgency(1);
2102 return;
2103 case '\033': /* ESC */
2104 csireset();
2105 term.esc = ESC_START;
2106 return;
2107 case '\016': /* SO */
2108 case '\017': /* SI */
2109 /*
2110 * Different charsets are hard to handle. Applications
2111 * should use the right alt charset escapes for the
2112 * only reason they still exist: line drawing. The
2113 * rest is incompatible history st should not support.
2114 */
2115 return;
2116 case '\032': /* SUB */
2117 case '\030': /* CAN */
2118 csireset();
2119 return;
2120 case '\005': /* ENQ (IGNORED) */
2121 case '\000': /* NUL (IGNORED) */
2122 case '\021': /* XON (IGNORED) */
2123 case '\023': /* XOFF (IGNORED) */
2124 case 0177: /* DEL (IGNORED) */
2125 return;
2126 }
2127 } else if(term.esc & ESC_START) {
2128 if(term.esc & ESC_CSI) {
2129 csiescseq.buf[csiescseq.len++] = ascii;
2130 if(BETWEEN(ascii, 0x40, 0x7E)
2131 || csiescseq.len >= \
2132 sizeof(csiescseq.buf)-1) {
2133 term.esc = 0;
2134 csiparse();
2135 csihandle();
2136 }
2137 } else if(term.esc & ESC_STR_END) {
2138 term.esc = 0;
2139 if(ascii == '\\')
2140 strhandle();
2141 } else if(term.esc & ESC_ALTCHARSET) {
2142 switch(ascii) {
2143 case '0': /* Line drawing set */
2144 term.c.attr.mode |= ATTR_GFX;
2145 break;
2146 case 'B': /* USASCII */
2147 term.c.attr.mode &= ~ATTR_GFX;
2148 break;
2149 case 'A': /* UK (IGNORED) */
2150 case '<': /* multinational charset (IGNORED) */
2151 case '5': /* Finnish (IGNORED) */
2152 case 'C': /* Finnish (IGNORED) */
2153 case 'K': /* German (IGNORED) */
2154 break;
2155 default:
2156 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2157 }
2158 term.esc = 0;
2159 } else if(term.esc & ESC_TEST) {
2160 if(ascii == '8') { /* DEC screen alignment test. */
2161 char E[UTF_SIZ] = "E";
2162 int x, y;
2163
2164 for(x = 0; x < term.col; ++x) {
2165 for(y = 0; y < term.row; ++y)
2166 tsetchar(E, &term.c.attr, x, y);
2167 }
2168 }
2169 term.esc = 0;
2170 } else {
2171 switch(ascii) {
2172 case '[':
2173 term.esc |= ESC_CSI;
2174 break;
2175 case '#':
2176 term.esc |= ESC_TEST;
2177 break;
2178 case 'P': /* DCS -- Device Control String */
2179 case '_': /* APC -- Application Program Command */
2180 case '^': /* PM -- Privacy Message */
2181 case ']': /* OSC -- Operating System Command */
2182 case 'k': /* old title set compatibility */
2183 strreset();
2184 strescseq.type = ascii;
2185 term.esc |= ESC_STR;
2186 break;
2187 case '(': /* set primary charset G0 */
2188 term.esc |= ESC_ALTCHARSET;
2189 break;
2190 case ')': /* set secondary charset G1 (IGNORED) */
2191 case '*': /* set tertiary charset G2 (IGNORED) */
2192 case '+': /* set quaternary charset G3 (IGNORED) */
2193 term.esc = 0;
2194 break;
2195 case 'D': /* IND -- Linefeed */
2196 if(term.c.y == term.bot) {
2197 tscrollup(term.top, 1);
2198 } else {
2199 tmoveto(term.c.x, term.c.y+1);
2200 }
2201 term.esc = 0;
2202 break;
2203 case 'E': /* NEL -- Next line */
2204 tnewline(1); /* always go to first col */
2205 term.esc = 0;
2206 break;
2207 case 'H': /* HTS -- Horizontal tab stop */
2208 term.tabs[term.c.x] = 1;
2209 term.esc = 0;
2210 break;
2211 case 'M': /* RI -- Reverse index */
2212 if(term.c.y == term.top) {
2213 tscrolldown(term.top, 1);
2214 } else {
2215 tmoveto(term.c.x, term.c.y-1);
2216 }
2217 term.esc = 0;
2218 break;
2219 case 'Z': /* DECID -- Identify Terminal */
2220 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2221 term.esc = 0;
2222 break;
2223 case 'c': /* RIS -- Reset to inital state */
2224 treset();
2225 term.esc = 0;
2226 xresettitle();
2227 break;
2228 case '=': /* DECPAM -- Application keypad */
2229 term.mode |= MODE_APPKEYPAD;
2230 term.esc = 0;
2231 break;
2232 case '>': /* DECPNM -- Normal keypad */
2233 term.mode &= ~MODE_APPKEYPAD;
2234 term.esc = 0;
2235 break;
2236 case '7': /* DECSC -- Save Cursor */
2237 tcursor(CURSOR_SAVE);
2238 term.esc = 0;
2239 break;
2240 case '8': /* DECRC -- Restore Cursor */
2241 tcursor(CURSOR_LOAD);
2242 term.esc = 0;
2243 break;
2244 case '\\': /* ST -- Stop */
2245 term.esc = 0;
2246 break;
2247 default:
2248 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2249 (uchar) ascii, isprint(ascii)? ascii:'.');
2250 term.esc = 0;
2251 }
2252 }
2253 /*
2254 * All characters which form part of a sequence are not
2255 * printed
2256 */
2257 return;
2258 }
2259 /*
2260 * Display control codes only if we are in graphic mode
2261 */
2262 if(control && !(term.c.attr.mode & ATTR_GFX))
2263 return;
2264 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2265 sel.bx = -1;
2266 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2267 tnewline(1); /* always go to first col */
2268
2269 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2270 memmove(&term.line[term.c.y][term.c.x+1],
2271 &term.line[term.c.y][term.c.x],
2272 (term.col - term.c.x - 1) * sizeof(Glyph));
2273 }
2274
2275 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2276 if(term.c.x+1 < term.col) {
2277 tmoveto(term.c.x+1, term.c.y);
2278 } else {
2279 term.c.state |= CURSOR_WRAPNEXT;
2280 }
2281 }
2282
2283 int
2284 tresize(int col, int row) {
2285 int i, x;
2286 int minrow = MIN(row, term.row);
2287 int mincol = MIN(col, term.col);
2288 int slide = term.c.y - row + 1;
2289 bool *bp;
2290
2291 if(col < 1 || row < 1)
2292 return 0;
2293
2294 /* free unneeded rows */
2295 i = 0;
2296 if(slide > 0) {
2297 /*
2298 * slide screen to keep cursor where we expect it -
2299 * tscrollup would work here, but we can optimize to
2300 * memmove because we're freeing the earlier lines
2301 */
2302 for(/* i = 0 */; i < slide; i++) {
2303 free(term.line[i]);
2304 free(term.alt[i]);
2305 }
2306 memmove(term.line, term.line + slide, row * sizeof(Line));
2307 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2308 }
2309 for(i += row; i < term.row; i++) {
2310 free(term.line[i]);
2311 free(term.alt[i]);
2312 }
2313
2314 /* resize to new height */
2315 term.line = xrealloc(term.line, row * sizeof(Line));
2316 term.alt = xrealloc(term.alt, row * sizeof(Line));
2317 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2318 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2319
2320 /* resize each row to new width, zero-pad if needed */
2321 for(i = 0; i < minrow; i++) {
2322 term.dirty[i] = 1;
2323 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2324 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2325 for(x = mincol; x < col; x++) {
2326 term.line[i][x].state = 0;
2327 term.alt[i][x].state = 0;
2328 }
2329 }
2330
2331 /* allocate any new rows */
2332 for(/* i == minrow */; i < row; i++) {
2333 term.dirty[i] = 1;
2334 term.line[i] = xcalloc(col, sizeof(Glyph));
2335 term.alt [i] = xcalloc(col, sizeof(Glyph));
2336 }
2337 if(col > term.col) {
2338 bp = term.tabs + term.col;
2339
2340 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2341 while(--bp > term.tabs && !*bp)
2342 /* nothing */ ;
2343 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2344 *bp = 1;
2345 }
2346 /* update terminal size */
2347 term.col = col;
2348 term.row = row;
2349 /* reset scrolling region */
2350 tsetscroll(0, row-1);
2351 /* make use of the LIMIT in tmoveto */
2352 tmoveto(term.c.x, term.c.y);
2353
2354 return (slide > 0);
2355 }
2356
2357 void
2358 xresize(int col, int row) {
2359 xw.tw = MAX(1, col * xw.cw);
2360 xw.th = MAX(1, row * xw.ch);
2361
2362 XFreePixmap(xw.dpy, xw.buf);
2363 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2364 DefaultDepth(xw.dpy, xw.scr));
2365 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg].pixel);
2366 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2367
2368 XftDrawChange(xw.draw, xw.buf);
2369 }
2370
2371 static inline ushort
2372 sixd_to_16bit(int x) {
2373 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2374 }
2375
2376 void
2377 xloadcols(void) {
2378 int i, r, g, b;
2379 XRenderColor color = { .alpha = 0xffff };
2380
2381 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2382 for(i = 0; i < LEN(colorname); i++) {
2383 if(!colorname[i])
2384 continue;
2385 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2386 die("Could not allocate color '%s'\n", colorname[i]);
2387 }
2388 }
2389
2390 /* load colors [16-255] ; same colors as xterm */
2391 for(i = 16, r = 0; r < 6; r++) {
2392 for(g = 0; g < 6; g++) {
2393 for(b = 0; b < 6; b++) {
2394 color.red = sixd_to_16bit(r);
2395 color.green = sixd_to_16bit(g);
2396 color.blue = sixd_to_16bit(b);
2397 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2398 die("Could not allocate color %d\n", i);
2399 }
2400 i++;
2401 }
2402 }
2403 }
2404
2405 for(r = 0; r < 24; r++, i++) {
2406 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2407 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2408 &dc.col[i])) {
2409 die("Could not allocate color %d\n", i);
2410 }
2411 }
2412 }
2413
2414 int
2415 xsetcolorname(int x, const char *name) {
2416 XRenderColor color = { .alpha = 0xffff };
2417 Colour colour;
2418 if (x < 0 || x > LEN(colorname))
2419 return -1;
2420 if(!name) {
2421 if(16 <= x && x < 16 + 216) {
2422 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2423 color.red = sixd_to_16bit(r);
2424 color.green = sixd_to_16bit(g);
2425 color.blue = sixd_to_16bit(b);
2426 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2427 return 0; /* something went wrong */
2428 dc.col[x] = colour;
2429 return 1;
2430 } else if (16 + 216 <= x && x < 256) {
2431 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2432 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2433 return 0; /* something went wrong */
2434 dc.col[x] = colour;
2435 return 1;
2436 } else {
2437 name = colorname[x];
2438 }
2439 }
2440 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2441 return 0;
2442 dc.col[x] = colour;
2443 return 1;
2444 }
2445
2446 void
2447 xtermclear(int col1, int row1, int col2, int row2) {
2448 XftDrawRect(xw.draw,
2449 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2450 borderpx + col1 * xw.cw,
2451 borderpx + row1 * xw.ch,
2452 (col2-col1+1) * xw.cw,
2453 (row2-row1+1) * xw.ch);
2454 }
2455
2456 /*
2457 * Absolute coordinates.
2458 */
2459 void
2460 xclear(int x1, int y1, int x2, int y2) {
2461 XftDrawRect(xw.draw,
2462 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2463 x1, y1, x2-x1, y2-y1);
2464 }
2465
2466 void
2467 xhints(void) {
2468 XClassHint class = {opt_class ? opt_class : termname, termname};
2469 XWMHints wm = {.flags = InputHint, .input = 1};
2470 XSizeHints *sizeh = NULL;
2471
2472 sizeh = XAllocSizeHints();
2473 if(xw.isfixed == False) {
2474 sizeh->flags = PSize | PResizeInc | PBaseSize;
2475 sizeh->height = xw.h;
2476 sizeh->width = xw.w;
2477 sizeh->height_inc = xw.ch;
2478 sizeh->width_inc = xw.cw;
2479 sizeh->base_height = 2 * borderpx;
2480 sizeh->base_width = 2 * borderpx;
2481 } else {
2482 sizeh->flags = PMaxSize | PMinSize;
2483 sizeh->min_width = sizeh->max_width = xw.fw;
2484 sizeh->min_height = sizeh->max_height = xw.fh;
2485 }
2486
2487 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2488 XFree(sizeh);
2489 }
2490
2491 int
2492 xloadfont(Font *f, FcPattern *pattern) {
2493 FcPattern *match;
2494 FcResult result;
2495
2496 match = FcFontMatch(NULL, pattern, &result);
2497 if(!match)
2498 return 1;
2499
2500 if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
2501 FcPatternDestroy(match);
2502 return 1;
2503 }
2504
2505 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2506 FcPatternDestroy(match);
2507 return 1;
2508 }
2509
2510 f->pattern = FcPatternDuplicate(pattern);
2511
2512 f->ascent = f->match->ascent;
2513 f->descent = f->match->descent;
2514 f->lbearing = 0;
2515 f->rbearing = f->match->max_advance_width;
2516
2517 f->height = f->ascent + f->descent;
2518 f->width = f->lbearing + f->rbearing;
2519
2520 return 0;
2521 }
2522
2523 void
2524 xloadfonts(char *fontstr, int fontsize) {
2525 FcPattern *pattern;
2526 FcResult result;
2527 double fontval;
2528
2529 if(fontstr[0] == '-') {
2530 pattern = XftXlfdParse(fontstr, False, False);
2531 } else {
2532 pattern = FcNameParse((FcChar8 *)fontstr);
2533 }
2534
2535 if(!pattern)
2536 die("st: can't open font %s\n", fontstr);
2537
2538 if(fontsize > 0) {
2539 FcPatternDel(pattern, FC_PIXEL_SIZE);
2540 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2541 usedfontsize = fontsize;
2542 } else {
2543 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2544 if(result == FcResultMatch) {
2545 usedfontsize = (int)fontval;
2546 } else {
2547 /*
2548 * Default font size is 12, if none given. This is to
2549 * have a known usedfontsize value.
2550 */
2551 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2552 usedfontsize = 12;
2553 }
2554 }
2555
2556 FcConfigSubstitute(0, pattern, FcMatchPattern);
2557 FcDefaultSubstitute(pattern);
2558
2559 if(xloadfont(&dc.font, pattern))
2560 die("st: can't open font %s\n", fontstr);
2561
2562 /* Setting character width and height. */
2563 xw.cw = dc.font.width;
2564 xw.ch = dc.font.height;
2565
2566 FcPatternDel(pattern, FC_SLANT);
2567 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2568 if(xloadfont(&dc.ifont, pattern))
2569 die("st: can't open font %s\n", fontstr);
2570
2571 FcPatternDel(pattern, FC_WEIGHT);
2572 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2573 if(xloadfont(&dc.ibfont, pattern))
2574 die("st: can't open font %s\n", fontstr);
2575
2576 FcPatternDel(pattern, FC_SLANT);
2577 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2578 if(xloadfont(&dc.bfont, pattern))
2579 die("st: can't open font %s\n", fontstr);
2580
2581 FcPatternDestroy(pattern);
2582 }
2583
2584 void
2585 xunloadfonts(void) {
2586 int i, ip;
2587
2588 /*
2589 * Free the loaded fonts in the font cache. This is done backwards
2590 * from the frccur.
2591 */
2592 for(i = 0, ip = frccur; i < frclen; i++, ip--) {
2593 if(ip < 0)
2594 ip = LEN(frc) - 1;
2595 XftFontClose(xw.dpy, frc[ip].font);
2596 }
2597 frccur = -1;
2598 frclen = 0;
2599
2600 XftFontClose(xw.dpy, dc.font.match);
2601 FcPatternDestroy(dc.font.pattern);
2602 FcFontSetDestroy(dc.font.set);
2603 XftFontClose(xw.dpy, dc.bfont.match);
2604 FcPatternDestroy(dc.bfont.pattern);
2605 FcFontSetDestroy(dc.bfont.set);
2606 XftFontClose(xw.dpy, dc.ifont.match);
2607 FcPatternDestroy(dc.ifont.pattern);
2608 FcFontSetDestroy(dc.ifont.set);
2609 XftFontClose(xw.dpy, dc.ibfont.match);
2610 FcPatternDestroy(dc.ibfont.pattern);
2611 FcFontSetDestroy(dc.ibfont.set);
2612 }
2613
2614 void
2615 xzoom(const Arg *arg) {
2616 xunloadfonts();
2617 xloadfonts(usedfont, usedfontsize + arg->i);
2618 cresize(0, 0);
2619 redraw(0);
2620 }
2621
2622 void
2623 xinit(void) {
2624 XSetWindowAttributes attrs;
2625 XGCValues gcvalues;
2626 Cursor cursor;
2627 Window parent;
2628 int sw, sh;
2629
2630 if(!(xw.dpy = XOpenDisplay(NULL)))
2631 die("Can't open display\n");
2632 xw.scr = XDefaultScreen(xw.dpy);
2633 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2634
2635 /* font */
2636 if(!FcInit())
2637 die("Could not init fontconfig.\n");
2638
2639 usedfont = (opt_font == NULL)? font : opt_font;
2640 xloadfonts(usedfont, 0);
2641
2642 /* colors */
2643 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2644 xloadcols();
2645
2646 /* adjust fixed window geometry */
2647 if(xw.isfixed) {
2648 sw = DisplayWidth(xw.dpy, xw.scr);
2649 sh = DisplayHeight(xw.dpy, xw.scr);
2650 if(xw.fx < 0)
2651 xw.fx = sw + xw.fx - xw.fw - 1;
2652 if(xw.fy < 0)
2653 xw.fy = sh + xw.fy - xw.fh - 1;
2654
2655 xw.h = xw.fh;
2656 xw.w = xw.fw;
2657 } else {
2658 /* window - default size */
2659 xw.h = 2 * borderpx + term.row * xw.ch;
2660 xw.w = 2 * borderpx + term.col * xw.cw;
2661 xw.fx = 0;
2662 xw.fy = 0;
2663 }
2664
2665 /* Events */
2666 attrs.background_pixel = dc.col[defaultbg].pixel;
2667 attrs.border_pixel = dc.col[defaultbg].pixel;
2668 attrs.bit_gravity = NorthWestGravity;
2669 attrs.event_mask = FocusChangeMask | KeyPressMask
2670 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2671 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2672 attrs.colormap = xw.cmap;
2673
2674 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2675 XRootWindow(xw.dpy, xw.scr);
2676 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2677 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2678 xw.vis,
2679 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2680 | CWColormap,
2681 &attrs);
2682
2683 memset(&gcvalues, 0, sizeof(gcvalues));
2684 gcvalues.graphics_exposures = False;
2685 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2686 &gcvalues);
2687 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2688 DefaultDepth(xw.dpy, xw.scr));
2689 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2690 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2691
2692 /* Xft rendering context */
2693 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2694
2695 /* input methods */
2696 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2697 XSetLocaleModifiers("@im=local");
2698 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2699 XSetLocaleModifiers("@im=");
2700 if((xw.xim = XOpenIM(xw.dpy,
2701 NULL, NULL, NULL)) == NULL) {
2702 die("XOpenIM failed. Could not open input"
2703 " device.\n");
2704 }
2705 }
2706 }
2707 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2708 | XIMStatusNothing, XNClientWindow, xw.win,
2709 XNFocusWindow, xw.win, NULL);
2710 if(xw.xic == NULL)
2711 die("XCreateIC failed. Could not obtain input method.\n");
2712
2713 /* white cursor, black outline */
2714 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2715 XDefineCursor(xw.dpy, xw.win, cursor);
2716 XRecolorCursor(xw.dpy, cursor,
2717 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2718 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2719
2720 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2721 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2722 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2723
2724 xresettitle();
2725 XMapWindow(xw.dpy, xw.win);
2726 xhints();
2727 XSync(xw.dpy, 0);
2728 }
2729
2730 void
2731 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2732 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2733 width = charlen * xw.cw, xp, i;
2734 int frp, frcflags;
2735 int u8fl, u8fblen, u8cblen, doesexist;
2736 char *u8c, *u8fs;
2737 long u8char;
2738 Font *font = &dc.font;
2739 FcResult fcres;
2740 FcPattern *fcpattern, *fontpattern;
2741 FcFontSet *fcsets[] = { NULL };
2742 FcCharSet *fccharset;
2743 Colour *fg, *bg, *temp, revfg, revbg;
2744 XRenderColor colfg, colbg;
2745
2746 frcflags = FRC_NORMAL;
2747
2748 if(base.mode & ATTR_ITALIC) {
2749 if(base.fg == defaultfg)
2750 base.fg = defaultitalic;
2751 font = &dc.ifont;
2752 frcflags = FRC_ITALIC;
2753 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2754 if(base.fg == defaultfg)
2755 base.fg = defaultitalic;
2756 font = &dc.ibfont;
2757 frcflags = FRC_ITALICBOLD;
2758 } else if(base.mode & ATTR_UNDERLINE) {
2759 if(base.fg == defaultfg)
2760 base.fg = defaultunderline;
2761 }
2762 fg = &dc.col[base.fg];
2763 bg = &dc.col[base.bg];
2764
2765 if(base.mode & ATTR_BOLD) {
2766 if(BETWEEN(base.fg, 0, 7)) {
2767 /* basic system colors */
2768 fg = &dc.col[base.fg + 8];
2769 } else if(BETWEEN(base.fg, 16, 195)) {
2770 /* 256 colors */
2771 fg = &dc.col[base.fg + 36];
2772 } else if(BETWEEN(base.fg, 232, 251)) {
2773 /* greyscale */
2774 fg = &dc.col[base.fg + 4];
2775 }
2776 /*
2777 * Those ranges will not be brightened:
2778 * 8 - 15 – bright system colors
2779 * 196 - 231 – highest 256 color cube
2780 * 252 - 255 – brightest colors in greyscale
2781 */
2782 font = &dc.bfont;
2783 frcflags = FRC_BOLD;
2784 }
2785
2786 if(IS_SET(MODE_REVERSE)) {
2787 if(fg == &dc.col[defaultfg]) {
2788 fg = &dc.col[defaultbg];
2789 } else {
2790 colfg.red = ~fg->color.red;
2791 colfg.green = ~fg->color.green;
2792 colfg.blue = ~fg->color.blue;
2793 colfg.alpha = fg->color.alpha;
2794 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2795 fg = &revfg;
2796 }
2797
2798 if(bg == &dc.col[defaultbg]) {
2799 bg = &dc.col[defaultfg];
2800 } else {
2801 colbg.red = ~bg->color.red;
2802 colbg.green = ~bg->color.green;
2803 colbg.blue = ~bg->color.blue;
2804 colbg.alpha = bg->color.alpha;
2805 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2806 bg = &revbg;
2807 }
2808 }
2809
2810 if(base.mode & ATTR_REVERSE) {
2811 temp = fg;
2812 fg = bg;
2813 bg = temp;
2814 }
2815
2816 /* Intelligent cleaning up of the borders. */
2817 if(x == 0) {
2818 xclear(0, (y == 0)? 0 : winy, borderpx,
2819 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2820 }
2821 if(x + charlen >= term.col) {
2822 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2823 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2824 }
2825 if(y == 0)
2826 xclear(winx, 0, winx + width, borderpx);
2827 if(y == term.row-1)
2828 xclear(winx, winy + xw.ch, winx + width, xw.h);
2829
2830 /* Clean up the region we want to draw to. */
2831 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2832
2833 fcsets[0] = font->set;
2834 for(xp = winx; bytelen > 0;) {
2835 /*
2836 * Search for the range in the to be printed string of glyphs
2837 * that are in the main font. Then print that range. If
2838 * some glyph is found that is not in the font, do the
2839 * fallback dance.
2840 */
2841 u8fs = s;
2842 u8fblen = 0;
2843 u8fl = 0;
2844 for(;;) {
2845 u8c = s;
2846 u8cblen = utf8decode(s, &u8char);
2847 s += u8cblen;
2848 bytelen -= u8cblen;
2849
2850 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
2851 if(!doesexist || bytelen <= 0) {
2852 if(bytelen <= 0) {
2853 if(doesexist) {
2854 u8fl++;
2855 u8fblen += u8cblen;
2856 }
2857 }
2858
2859 if(u8fl > 0) {
2860 XftDrawStringUtf8(xw.draw, fg,
2861 font->match, xp,
2862 winy + font->ascent,
2863 (FcChar8 *)u8fs,
2864 u8fblen);
2865 xp += font->width * u8fl;
2866 }
2867 break;
2868 }
2869
2870 u8fl++;
2871 u8fblen += u8cblen;
2872 }
2873 if(doesexist)
2874 break;
2875
2876 frp = frccur;
2877 /* Search the font cache. */
2878 for(i = 0; i < frclen; i++, frp--) {
2879 if(frp <= 0)
2880 frp = LEN(frc) - 1;
2881
2882 if(frc[frp].c == u8char
2883 && frc[frp].flags == frcflags) {
2884 break;
2885 }
2886 }
2887
2888 /* Nothing was found. */
2889 if(i >= frclen) {
2890 /*
2891 * Nothing was found in the cache. Now use
2892 * some dozen of Fontconfig calls to get the
2893 * font for one single character.
2894 */
2895 fcpattern = FcPatternDuplicate(font->pattern);
2896 fccharset = FcCharSetCreate();
2897
2898 FcCharSetAddChar(fccharset, u8char);
2899 FcPatternAddCharSet(fcpattern, FC_CHARSET,
2900 fccharset);
2901 FcPatternAddBool(fcpattern, FC_SCALABLE,
2902 FcTrue);
2903
2904 FcConfigSubstitute(0, fcpattern,
2905 FcMatchPattern);
2906 FcDefaultSubstitute(fcpattern);
2907
2908 fontpattern = FcFontSetMatch(0, fcsets,
2909 FcTrue, fcpattern, &fcres);
2910
2911 /*
2912 * Overwrite or create the new cache entry.
2913 */
2914 frccur++;
2915 frclen++;
2916 if(frccur >= LEN(frc))
2917 frccur = 0;
2918 if(frclen > LEN(frc)) {
2919 frclen = LEN(frc);
2920 XftFontClose(xw.dpy, frc[frccur].font);
2921 }
2922
2923 frc[frccur].font = XftFontOpenPattern(xw.dpy,
2924 fontpattern);
2925 frc[frccur].c = u8char;
2926 frc[frccur].flags = frcflags;
2927
2928 FcPatternDestroy(fcpattern);
2929 FcCharSetDestroy(fccharset);
2930
2931 frp = frccur;
2932 }
2933
2934 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
2935 xp, winy + frc[frp].font->ascent,
2936 (FcChar8 *)u8c, u8cblen);
2937
2938 xp += font->width;
2939 }
2940
2941 /*
2942 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
2943 winy + font->ascent, (FcChar8 *)s, bytelen);
2944 */
2945
2946 if(base.mode & ATTR_UNDERLINE) {
2947 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
2948 width, 1);
2949 }
2950 }
2951
2952 void
2953 xdrawcursor(void) {
2954 static int oldx = 0, oldy = 0;
2955 int sl;
2956 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs, 0};
2957
2958 LIMIT(oldx, 0, term.col-1);
2959 LIMIT(oldy, 0, term.row-1);
2960
2961 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2962 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2963
2964 /* remove the old cursor */
2965 if(term.line[oldy][oldx].state & GLYPH_SET) {
2966 sl = utf8size(term.line[oldy][oldx].c);
2967 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2968 oldy, 1, sl);
2969 } else {
2970 xtermclear(oldx, oldy, oldx, oldy);
2971 }
2972
2973 /* draw the new one */
2974 if(!(IS_SET(MODE_HIDE))) {
2975 if(!(xw.state & WIN_FOCUSED))
2976 g.bg = defaultucs;
2977
2978 if(IS_SET(MODE_REVERSE))
2979 g.mode |= ATTR_REVERSE, g.fg = defaultcs, g.bg = defaultfg;
2980
2981 sl = utf8size(g.c);
2982 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2983 oldx = term.c.x, oldy = term.c.y;
2984 }
2985 }
2986
2987
2988 void
2989 xsettitle(char *p) {
2990 XTextProperty prop;
2991
2992 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
2993 &prop);
2994 XSetWMName(xw.dpy, xw.win, &prop);
2995 }
2996
2997 void
2998 xresettitle(void) {
2999 xsettitle(opt_title ? opt_title : "st");
3000 }
3001
3002 void
3003 redraw(int timeout) {
3004 struct timespec tv = {0, timeout * 1000};
3005
3006 tfulldirt();
3007 draw();
3008
3009 if(timeout > 0) {
3010 nanosleep(&tv, NULL);
3011 XSync(xw.dpy, False); /* necessary for a good tput flash */
3012 }
3013 }
3014
3015 void
3016 draw(void) {
3017 drawregion(0, 0, term.col, term.row);
3018 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3019 xw.h, 0, 0);
3020 XSetForeground(xw.dpy, dc.gc,
3021 dc.col[IS_SET(MODE_REVERSE)?
3022 defaultfg : defaultbg].pixel);
3023 }
3024
3025 void
3026 drawregion(int x1, int y1, int x2, int y2) {
3027 int ic, ib, x, y, ox, sl;
3028 Glyph base, new;
3029 char buf[DRAW_BUF_SIZ];
3030 bool ena_sel = sel.bx != -1;
3031
3032 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3033 ena_sel = 0;
3034
3035 if(!(xw.state & WIN_VISIBLE))
3036 return;
3037
3038 for(y = y1; y < y2; y++) {
3039 if(!term.dirty[y])
3040 continue;
3041
3042 xtermclear(0, y, term.col, y);
3043 term.dirty[y] = 0;
3044 base = term.line[y][0];
3045 ic = ib = ox = 0;
3046 for(x = x1; x < x2; x++) {
3047 new = term.line[y][x];
3048 if(ena_sel && *(new.c) && selected(x, y))
3049 new.mode ^= ATTR_REVERSE;
3050 if(ib > 0 && (!(new.state & GLYPH_SET)
3051 || ATTRCMP(base, new)
3052 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3053 xdraws(buf, base, ox, y, ic, ib);
3054 ic = ib = 0;
3055 }
3056 if(new.state & GLYPH_SET) {
3057 if(ib == 0) {
3058 ox = x;
3059 base = new;
3060 }
3061
3062 sl = utf8size(new.c);
3063 memcpy(buf+ib, new.c, sl);
3064 ib += sl;
3065 ++ic;
3066 }
3067 }
3068 if(ib > 0)
3069 xdraws(buf, base, ox, y, ic, ib);
3070 }
3071 xdrawcursor();
3072 }
3073
3074 void
3075 expose(XEvent *ev) {
3076 XExposeEvent *e = &ev->xexpose;
3077
3078 if(xw.state & WIN_REDRAW) {
3079 if(!e->count)
3080 xw.state &= ~WIN_REDRAW;
3081 }
3082 redraw(0);
3083 }
3084
3085 void
3086 visibility(XEvent *ev) {
3087 XVisibilityEvent *e = &ev->xvisibility;
3088
3089 if(e->state == VisibilityFullyObscured) {
3090 xw.state &= ~WIN_VISIBLE;
3091 } else if(!(xw.state & WIN_VISIBLE)) {
3092 /* need a full redraw for next Expose, not just a buf copy */
3093 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3094 }
3095 }
3096
3097 void
3098 unmap(XEvent *ev) {
3099 xw.state &= ~WIN_VISIBLE;
3100 }
3101
3102 void
3103 xseturgency(int add) {
3104 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3105
3106 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3107 XSetWMHints(xw.dpy, xw.win, h);
3108 XFree(h);
3109 }
3110
3111 void
3112 focus(XEvent *ev) {
3113 XFocusChangeEvent *e = &ev->xfocus;
3114
3115 if(e->mode == NotifyGrab)
3116 return;
3117
3118 if(ev->type == FocusIn) {
3119 XSetICFocus(xw.xic);
3120 xw.state |= WIN_FOCUSED;
3121 xseturgency(0);
3122 } else {
3123 XUnsetICFocus(xw.xic);
3124 xw.state &= ~WIN_FOCUSED;
3125 }
3126 }
3127
3128 inline bool
3129 match(uint mask, uint state) {
3130 state &= ~(ignoremod);
3131
3132 if(mask == XK_NO_MOD && state)
3133 return false;
3134 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3135 return false;
3136 if((state & mask) != state)
3137 return false;
3138 return true;
3139 }
3140
3141 void
3142 numlock(const Arg *dummy) {
3143 term.numlock ^= 1;
3144 }
3145
3146 char*
3147 kmap(KeySym k, uint state) {
3148 uint mask;
3149 Key *kp;
3150 int i;
3151
3152 /* Check for mapped keys out of X11 function keys. */
3153 for(i = 0; i < LEN(mappedkeys); i++) {
3154 if(mappedkeys[i] == k)
3155 break;
3156 }
3157 if(i == LEN(mappedkeys)) {
3158 if((k & 0xFFFF) < 0xFD00)
3159 return NULL;
3160 }
3161
3162 for(kp = key; kp < key + LEN(key); kp++) {
3163 mask = kp->mask;
3164
3165 if(kp->k != k)
3166 continue;
3167
3168 if(!match(mask, state))
3169 continue;
3170
3171 if(kp->appkey > 0) {
3172 if(!IS_SET(MODE_APPKEYPAD))
3173 continue;
3174 if(term.numlock && kp->appkey == 2)
3175 continue;
3176 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3177 continue;
3178 }
3179
3180 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3181 (kp->appcursor > 0
3182 && !IS_SET(MODE_APPCURSOR))) {
3183 continue;
3184 }
3185
3186 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3187 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3188 continue;
3189 }
3190
3191 return kp->s;
3192 }
3193
3194 return NULL;
3195 }
3196
3197 void
3198 kpress(XEvent *ev) {
3199 XKeyEvent *e = &ev->xkey;
3200 KeySym ksym;
3201 char xstr[31], buf[32], *customkey, *cp = buf;
3202 int len;
3203 Status status;
3204 Shortcut *bp;
3205
3206 if(IS_SET(MODE_KBDLOCK))
3207 return;
3208
3209 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3210 e->state &= ~Mod2Mask;
3211 /* 1. shortcuts */
3212 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3213 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3214 bp->func(&(bp->arg));
3215 return;
3216 }
3217 }
3218
3219 /* 2. custom keys from config.h */
3220 if((customkey = kmap(ksym, e->state))) {
3221 len = strlen(customkey);
3222 memcpy(buf, customkey, len);
3223 /* 2. hardcoded (overrides X lookup) */
3224 } else {
3225 if(len == 0)
3226 return;
3227
3228 if(len == 1 && e->state & Mod1Mask)
3229 *cp++ = '\033';
3230
3231 memcpy(cp, xstr, len);
3232 len = cp - buf + len;
3233 }
3234
3235 ttywrite(buf, len);
3236 if(IS_SET(MODE_ECHO))
3237 techo(buf, len);
3238 }
3239
3240
3241 void
3242 cmessage(XEvent *e) {
3243 /*
3244 * See xembed specs
3245 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3246 */
3247 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3248 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3249 xw.state |= WIN_FOCUSED;
3250 xseturgency(0);
3251 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3252 xw.state &= ~WIN_FOCUSED;
3253 }
3254 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3255 /* Send SIGHUP to shell */
3256 kill(pid, SIGHUP);
3257 exit(EXIT_SUCCESS);
3258 }
3259 }
3260
3261 void
3262 cresize(int width, int height) {
3263 int col, row;
3264
3265 if(width != 0)
3266 xw.w = width;
3267 if(height != 0)
3268 xw.h = height;
3269
3270 col = (xw.w - 2 * borderpx) / xw.cw;
3271 row = (xw.h - 2 * borderpx) / xw.ch;
3272
3273 tresize(col, row);
3274 xresize(col, row);
3275 ttyresize();
3276 }
3277
3278 void
3279 resize(XEvent *e) {
3280 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3281 return;
3282
3283 cresize(e->xconfigure.width, e->xconfigure.height);
3284 }
3285
3286 void
3287 run(void) {
3288 XEvent ev;
3289 fd_set rfd;
3290 int xfd = XConnectionNumber(xw.dpy), xev;
3291 struct timeval drawtimeout, *tv = NULL, now, last;
3292
3293 gettimeofday(&last, NULL);
3294
3295 for(xev = actionfps;;) {
3296 FD_ZERO(&rfd);
3297 FD_SET(cmdfd, &rfd);
3298 FD_SET(xfd, &rfd);
3299 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3300 if(errno == EINTR)
3301 continue;
3302 die("select failed: %s\n", SERRNO);
3303 }
3304
3305 gettimeofday(&now, NULL);
3306 drawtimeout.tv_sec = 0;
3307 drawtimeout.tv_usec = (1000/xfps) * 1000;
3308 tv = &drawtimeout;
3309
3310 if(FD_ISSET(cmdfd, &rfd))
3311 ttyread();
3312
3313 if(FD_ISSET(xfd, &rfd))
3314 xev = actionfps;
3315
3316 if(TIMEDIFF(now, last) > \
3317 (xev ? (1000/xfps) : (1000/actionfps))) {
3318 while(XPending(xw.dpy)) {
3319 XNextEvent(xw.dpy, &ev);
3320 if(XFilterEvent(&ev, None))
3321 continue;
3322 if(handler[ev.type])
3323 (handler[ev.type])(&ev);
3324 }
3325
3326 draw();
3327 XFlush(xw.dpy);
3328 last = now;
3329
3330 if(xev && !FD_ISSET(xfd, &rfd))
3331 xev--;
3332 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd))
3333 tv = NULL;
3334 }
3335 }
3336 }
3337
3338 void
3339 usage(void) {
3340 die("%s " VERSION " (c) 2010-2013 st engineers\n" \
3341 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3342 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3343 }
3344
3345 int
3346 main(int argc, char *argv[]) {
3347 int bitm, xr, yr;
3348 uint wr, hr;
3349
3350 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3351 xw.isfixed = False;
3352
3353 ARGBEGIN {
3354 case 'a':
3355 allowaltscreen = false;
3356 break;
3357 case 'c':
3358 opt_class = EARGF(usage());
3359 break;
3360 case 'e':
3361 /* eat all remaining arguments */
3362 if(argc > 1)
3363 opt_cmd = &argv[1];
3364 goto run;
3365 case 'f':
3366 opt_font = EARGF(usage());
3367 break;
3368 case 'g':
3369 bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
3370 if(bitm & XValue)
3371 xw.fx = xr;
3372 if(bitm & YValue)
3373 xw.fy = yr;
3374 if(bitm & WidthValue)
3375 xw.fw = (int)wr;
3376 if(bitm & HeightValue)
3377 xw.fh = (int)hr;
3378 if(bitm & XNegative && xw.fx == 0)
3379 xw.fx = -1;
3380 if(bitm & XNegative && xw.fy == 0)
3381 xw.fy = -1;
3382
3383 if(xw.fh != 0 && xw.fw != 0)
3384 xw.isfixed = True;
3385 break;
3386 case 'o':
3387 opt_io = EARGF(usage());
3388 break;
3389 case 't':
3390 opt_title = EARGF(usage());
3391 break;
3392 case 'w':
3393 opt_embed = EARGF(usage());
3394 break;
3395 case 'v':
3396 default:
3397 usage();
3398 } ARGEND;
3399
3400 run:
3401 setlocale(LC_CTYPE, "");
3402 XSetLocaleModifiers("");
3403 tnew(80, 24);
3404 xinit();
3405 ttynew();
3406 selinit();
3407 run();
3408
3409 return 0;
3410 }
3411