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Removed redundant check in draw code.
[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 #define Rectangle XRectangle
40
41 #if defined(__linux)
42 #include <pty.h>
43 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
44 #include <util.h>
45 #elif defined(__FreeBSD__) || defined(__DragonFly__)
46 #include <libutil.h>
47 #endif
48
49
50 /* XEMBED messages */
51 #define XEMBED_FOCUS_IN 4
52 #define XEMBED_FOCUS_OUT 5
53
54 /* Arbitrary sizes */
55 #define UTF_SIZ 4
56 #define ESC_BUF_SIZ (128*UTF_SIZ)
57 #define ESC_ARG_SIZ 16
58 #define STR_BUF_SIZ ESC_BUF_SIZ
59 #define STR_ARG_SIZ ESC_ARG_SIZ
60 #define DRAW_BUF_SIZ 20*1024
61 #define XK_ANY_MOD UINT_MAX
62 #define XK_NO_MOD 0
63 #define XK_SWITCH_MOD (1<<13)
64
65 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
66
67 /* macros */
68 #define SERRNO strerror(errno)
69 #define MIN(a, b) ((a) < (b) ? (a) : (b))
70 #define MAX(a, b) ((a) < (b) ? (b) : (a))
71 #define LEN(a) (sizeof(a) / sizeof(a[0]))
72 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
73 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
74 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
75 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
76 #define IS_SET(flag) ((term.mode & (flag)) != 0)
77 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
78
79 #define VT102ID "\033[?6c"
80
81 enum glyph_attribute {
82 ATTR_NULL = 0,
83 ATTR_REVERSE = 1,
84 ATTR_UNDERLINE = 2,
85 ATTR_BOLD = 4,
86 ATTR_GFX = 8,
87 ATTR_ITALIC = 16,
88 ATTR_BLINK = 32,
89 ATTR_WRAP = 64,
90 };
91
92 enum cursor_movement {
93 CURSOR_SAVE,
94 CURSOR_LOAD
95 };
96
97 enum cursor_state {
98 CURSOR_DEFAULT = 0,
99 CURSOR_WRAPNEXT = 1,
100 CURSOR_ORIGIN = 2
101 };
102
103 enum term_mode {
104 MODE_WRAP = 1,
105 MODE_INSERT = 2,
106 MODE_APPKEYPAD = 4,
107 MODE_ALTSCREEN = 8,
108 MODE_CRLF = 16,
109 MODE_MOUSEBTN = 32,
110 MODE_MOUSEMOTION = 64,
111 MODE_MOUSE = 32|64,
112 MODE_REVERSE = 128,
113 MODE_KBDLOCK = 256,
114 MODE_HIDE = 512,
115 MODE_ECHO = 1024,
116 MODE_APPCURSOR = 2048,
117 MODE_MOUSESGR = 4096,
118 MODE_8BIT = 8192,
119 };
120
121 enum escape_state {
122 ESC_START = 1,
123 ESC_CSI = 2,
124 ESC_STR = 4, /* DSC, OSC, PM, APC */
125 ESC_ALTCHARSET = 8,
126 ESC_STR_END = 16, /* a final string was encountered */
127 ESC_TEST = 32, /* Enter in test mode */
128 };
129
130 enum window_state {
131 WIN_VISIBLE = 1,
132 WIN_REDRAW = 2,
133 WIN_FOCUSED = 4
134 };
135
136 enum selection_type {
137 SEL_REGULAR = 1,
138 SEL_RECTANGULAR = 2
139 };
140
141 enum selection_snap {
142 SNAP_WORD = 1,
143 SNAP_LINE = 2
144 };
145
146 /* bit macro */
147 #undef B0
148 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
149
150 typedef unsigned char uchar;
151 typedef unsigned int uint;
152 typedef unsigned long ulong;
153 typedef unsigned short ushort;
154
155 typedef struct {
156 char c[UTF_SIZ]; /* character code */
157 uchar mode; /* attribute flags */
158 ushort fg; /* foreground */
159 ushort bg; /* background */
160 } Glyph;
161
162 typedef Glyph *Line;
163
164 typedef struct {
165 Glyph attr; /* current char attributes */
166 int x;
167 int y;
168 char state;
169 } TCursor;
170
171 /* CSI Escape sequence structs */
172 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
173 typedef struct {
174 char buf[ESC_BUF_SIZ]; /* raw string */
175 int len; /* raw string length */
176 char priv;
177 int arg[ESC_ARG_SIZ];
178 int narg; /* nb of args */
179 char mode;
180 } CSIEscape;
181
182 /* STR Escape sequence structs */
183 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
184 typedef struct {
185 char type; /* ESC type ... */
186 char buf[STR_BUF_SIZ]; /* raw string */
187 int len; /* raw string length */
188 char *args[STR_ARG_SIZ];
189 int narg; /* nb of args */
190 } STREscape;
191
192 /* Internal representation of the screen */
193 typedef struct {
194 int row; /* nb row */
195 int col; /* nb col */
196 Line *line; /* screen */
197 Line *alt; /* alternate screen */
198 bool *dirty; /* dirtyness of lines */
199 TCursor c; /* cursor */
200 int top; /* top scroll limit */
201 int bot; /* bottom scroll limit */
202 int mode; /* terminal mode flags */
203 int esc; /* escape state flags */
204 bool numlock; /* lock numbers in keyboard */
205 bool *tabs;
206 } Term;
207
208 /* Purely graphic info */
209 typedef struct {
210 Display *dpy;
211 Colourmap cmap;
212 Window win;
213 Drawable buf;
214 Atom xembed, wmdeletewin;
215 XIM xim;
216 XIC xic;
217 Draw draw;
218 Visual *vis;
219 int scr;
220 bool isfixed; /* is fixed geometry? */
221 int fx, fy, fw, fh; /* fixed geometry */
222 int tw, th; /* tty width and height */
223 int w, h; /* window width and height */
224 int ch; /* char height */
225 int cw; /* char width */
226 char state; /* focus, redraw, visible */
227 } XWindow;
228
229 typedef struct {
230 KeySym k;
231 uint mask;
232 char s[ESC_BUF_SIZ];
233 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
234 signed char appkey; /* application keypad */
235 signed char appcursor; /* application cursor */
236 signed char crlf; /* crlf mode */
237 } Key;
238
239 /* TODO: use better name for vars... */
240 typedef struct {
241 int mode;
242 int type;
243 int snap;
244 int bx, by;
245 int ex, ey;
246 struct {
247 int x, y;
248 } b, e;
249 char *clip;
250 Atom xtarget;
251 bool alt;
252 struct timeval tclick1;
253 struct timeval tclick2;
254 } Selection;
255
256 typedef union {
257 int i;
258 unsigned int ui;
259 float f;
260 const void *v;
261 } Arg;
262
263 typedef struct {
264 unsigned int mod;
265 KeySym keysym;
266 void (*func)(const Arg *);
267 const Arg arg;
268 } Shortcut;
269
270 /* function definitions used in config.h */
271 static void clippaste(const Arg *);
272 static void numlock(const Arg *);
273 static void selpaste(const Arg *);
274 static void xzoom(const Arg *);
275
276 /* Config.h for applying patches and the configuration. */
277 #include "config.h"
278
279 /* Font structure */
280 typedef struct {
281 int height;
282 int width;
283 int ascent;
284 int descent;
285 short lbearing;
286 short rbearing;
287 XftFont *match;
288 FcFontSet *set;
289 FcPattern *pattern;
290 } Font;
291
292 /* Drawing Context */
293 typedef struct {
294 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
295 Font font, bfont, ifont, ibfont;
296 GC gc;
297 } DC;
298
299 static void die(const char *, ...);
300 static void draw(void);
301 static void redraw(int);
302 static void drawregion(int, int, int, int);
303 static void execsh(void);
304 static void sigchld(int);
305 static void run(void);
306
307 static void csidump(void);
308 static void csihandle(void);
309 static void csiparse(void);
310 static void csireset(void);
311 static void strdump(void);
312 static void strhandle(void);
313 static void strparse(void);
314 static void strreset(void);
315
316 static void tclearregion(int, int, int, int);
317 static void tcursor(int);
318 static void tdeletechar(int);
319 static void tdeleteline(int);
320 static void tinsertblank(int);
321 static void tinsertblankline(int);
322 static void tmoveto(int, int);
323 static void tmoveato(int x, int y);
324 static void tnew(int, int);
325 static void tnewline(int);
326 static void tputtab(bool);
327 static void tputc(char *, int);
328 static void treset(void);
329 static int tresize(int, int);
330 static void tscrollup(int, int);
331 static void tscrolldown(int, int);
332 static void tsetattr(int*, int);
333 static void tsetchar(char *, Glyph *, int, int);
334 static void tsetscroll(int, int);
335 static void tswapscreen(void);
336 static void tsetdirt(int, int);
337 static void tsetmode(bool, bool, int *, int);
338 static void tfulldirt(void);
339 static void techo(char *, int);
340
341 static inline bool match(uint, uint);
342 static void ttynew(void);
343 static void ttyread(void);
344 static void ttyresize(void);
345 static void ttywrite(const char *, size_t);
346
347 static void xdraws(char *, Glyph, int, int, int, int);
348 static void xhints(void);
349 static void xclear(int, int, int, int);
350 static void xdrawcursor(void);
351 static void xinit(void);
352 static void xloadcols(void);
353 static int xsetcolorname(int, const char *);
354 static int xloadfont(Font *, FcPattern *);
355 static void xloadfonts(char *, int);
356 static void xsettitle(char *);
357 static void xresettitle(void);
358 static void xseturgency(int);
359 static void xsetsel(char*);
360 static void xtermclear(int, int, int, int);
361 static void xunloadfonts(void);
362 static void xresize(int, int);
363
364 static void expose(XEvent *);
365 static void visibility(XEvent *);
366 static void unmap(XEvent *);
367 static char *kmap(KeySym, uint);
368 static void kpress(XEvent *);
369 static void cmessage(XEvent *);
370 static void cresize(int, int);
371 static void resize(XEvent *);
372 static void focus(XEvent *);
373 static void brelease(XEvent *);
374 static void bpress(XEvent *);
375 static void bmotion(XEvent *);
376 static void selnotify(XEvent *);
377 static void selclear(XEvent *);
378 static void selrequest(XEvent *);
379
380 static void selinit(void);
381 static inline bool selected(int, int);
382 static void selcopy(void);
383 static void selscroll(int, int);
384 static void selsnap(int, int *, int *, int);
385
386 static int utf8decode(char *, long *);
387 static int utf8encode(long *, char *);
388 static int utf8size(char *);
389 static int isfullutf8(char *, int);
390
391 static ssize_t xwrite(int, char *, size_t);
392 static void *xmalloc(size_t);
393 static void *xrealloc(void *, size_t);
394 static void *xcalloc(size_t, size_t);
395
396 static void (*handler[LASTEvent])(XEvent *) = {
397 [KeyPress] = kpress,
398 [ClientMessage] = cmessage,
399 [ConfigureNotify] = resize,
400 [VisibilityNotify] = visibility,
401 [UnmapNotify] = unmap,
402 [Expose] = expose,
403 [FocusIn] = focus,
404 [FocusOut] = focus,
405 [MotionNotify] = bmotion,
406 [ButtonPress] = bpress,
407 [ButtonRelease] = brelease,
408 [SelectionClear] = selclear,
409 [SelectionNotify] = selnotify,
410 [SelectionRequest] = selrequest,
411 };
412
413 /* Globals */
414 static DC dc;
415 static XWindow xw;
416 static Term term;
417 static CSIEscape csiescseq;
418 static STREscape strescseq;
419 static int cmdfd;
420 static pid_t pid;
421 static Selection sel;
422 static int iofd = -1;
423 static char **opt_cmd = NULL;
424 static char *opt_io = NULL;
425 static char *opt_title = NULL;
426 static char *opt_embed = NULL;
427 static char *opt_class = NULL;
428 static char *opt_font = NULL;
429
430 static char *usedfont = NULL;
431 static int usedfontsize = 0;
432
433 /* Font Ring Cache */
434 enum {
435 FRC_NORMAL,
436 FRC_ITALIC,
437 FRC_BOLD,
438 FRC_ITALICBOLD
439 };
440
441 typedef struct {
442 XftFont *font;
443 long c;
444 int flags;
445 } Fontcache;
446
447 /*
448 * Fontcache is a ring buffer, with frccur as current position and frclen as
449 * the current length of used elements.
450 */
451
452 static Fontcache frc[1024];
453 static int frccur = -1, frclen = 0;
454
455 ssize_t
456 xwrite(int fd, char *s, size_t len) {
457 size_t aux = len;
458
459 while(len > 0) {
460 ssize_t r = write(fd, s, len);
461 if(r < 0)
462 return r;
463 len -= r;
464 s += r;
465 }
466 return aux;
467 }
468
469 void *
470 xmalloc(size_t len) {
471 void *p = malloc(len);
472
473 if(!p)
474 die("Out of memory\n");
475
476 return p;
477 }
478
479 void *
480 xrealloc(void *p, size_t len) {
481 if((p = realloc(p, len)) == NULL)
482 die("Out of memory\n");
483
484 return p;
485 }
486
487 void *
488 xcalloc(size_t nmemb, size_t size) {
489 void *p = calloc(nmemb, size);
490
491 if(!p)
492 die("Out of memory\n");
493
494 return p;
495 }
496
497 int
498 utf8decode(char *s, long *u) {
499 uchar c;
500 int i, n, rtn;
501
502 rtn = 1;
503 c = *s;
504 if(~c & B7) { /* 0xxxxxxx */
505 *u = c;
506 return rtn;
507 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
508 *u = c&(B4|B3|B2|B1|B0);
509 n = 1;
510 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
511 *u = c&(B3|B2|B1|B0);
512 n = 2;
513 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
514 *u = c & (B2|B1|B0);
515 n = 3;
516 } else {
517 goto invalid;
518 }
519
520 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
521 c = *s;
522 if((c & (B7|B6)) != B7) /* 10xxxxxx */
523 goto invalid;
524 *u <<= 6;
525 *u |= c & (B5|B4|B3|B2|B1|B0);
526 }
527
528 if((n == 1 && *u < 0x80) ||
529 (n == 2 && *u < 0x800) ||
530 (n == 3 && *u < 0x10000) ||
531 (*u >= 0xD800 && *u <= 0xDFFF)) {
532 goto invalid;
533 }
534
535 return rtn;
536 invalid:
537 *u = 0xFFFD;
538
539 return rtn;
540 }
541
542 int
543 utf8encode(long *u, char *s) {
544 uchar *sp;
545 ulong uc;
546 int i, n;
547
548 sp = (uchar *)s;
549 uc = *u;
550 if(uc < 0x80) {
551 *sp = uc; /* 0xxxxxxx */
552 return 1;
553 } else if(*u < 0x800) {
554 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
555 n = 1;
556 } else if(uc < 0x10000) {
557 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
558 n = 2;
559 } else if(uc <= 0x10FFFF) {
560 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
561 n = 3;
562 } else {
563 goto invalid;
564 }
565
566 for(i=n,++sp; i>0; --i,++sp)
567 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
568
569 return n+1;
570 invalid:
571 /* U+FFFD */
572 *s++ = '\xEF';
573 *s++ = '\xBF';
574 *s = '\xBD';
575
576 return 3;
577 }
578
579 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
580 UTF-8 otherwise return 0 */
581 int
582 isfullutf8(char *s, int b) {
583 uchar *c1, *c2, *c3;
584
585 c1 = (uchar *)s;
586 c2 = (uchar *)++s;
587 c3 = (uchar *)++s;
588 if(b < 1) {
589 return 0;
590 } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
591 return 0;
592 } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
593 ((b == 1) ||
594 ((b == 2) && (*c2&(B7|B6)) == B7))) {
595 return 0;
596 } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
597 ((b == 1) ||
598 ((b == 2) && (*c2&(B7|B6)) == B7) ||
599 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
600 return 0;
601 } else {
602 return 1;
603 }
604 }
605
606 int
607 utf8size(char *s) {
608 uchar c = *s;
609
610 if(~c&B7) {
611 return 1;
612 } else if((c&(B7|B6|B5)) == (B7|B6)) {
613 return 2;
614 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
615 return 3;
616 } else {
617 return 4;
618 }
619 }
620
621 void
622 selinit(void) {
623 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
624 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
625 sel.mode = 0;
626 sel.bx = -1;
627 sel.clip = NULL;
628 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
629 if(sel.xtarget == None)
630 sel.xtarget = XA_STRING;
631 }
632
633 static int
634 x2col(int x) {
635 x -= borderpx;
636 x /= xw.cw;
637
638 return LIMIT(x, 0, term.col-1);
639 }
640
641 static int
642 y2row(int y) {
643 y -= borderpx;
644 y /= xw.ch;
645
646 return LIMIT(y, 0, term.row-1);
647 }
648
649 static inline bool
650 selected(int x, int y) {
651 int bx, ex;
652
653 if(sel.ey == y && sel.by == y) {
654 bx = MIN(sel.bx, sel.ex);
655 ex = MAX(sel.bx, sel.ex);
656
657 return BETWEEN(x, bx, ex);
658 }
659
660 if(sel.type == SEL_RECTANGULAR) {
661 return ((sel.b.y <= y && y <= sel.e.y)
662 && (sel.b.x <= x && x <= sel.e.x));
663 }
664 return ((sel.b.y < y && y < sel.e.y)
665 || (y == sel.e.y && x <= sel.e.x))
666 || (y == sel.b.y && x >= sel.b.x
667 && (x <= sel.e.x || sel.b.y != sel.e.y));
668 }
669
670 void
671 selsnap(int mode, int *x, int *y, int direction) {
672 switch(mode) {
673 case SNAP_WORD:
674 while(*x > 0 && *x < term.col-1
675 && term.line[*y][*x + direction].c[0] != ' ') {
676 *x += direction;
677 }
678 break;
679 case SNAP_LINE:
680 *x = (direction < 0) ? 0 : term.col - 1;
681 break;
682 default:
683 break;
684 }
685 }
686
687 void
688 getbuttoninfo(XEvent *e) {
689 int type;
690 uint state = e->xbutton.state &~Button1Mask;
691
692 sel.alt = IS_SET(MODE_ALTSCREEN);
693
694 sel.ex = x2col(e->xbutton.x);
695 sel.ey = y2row(e->xbutton.y);
696
697 if (sel.by < sel.ey
698 || (sel.by == sel.ey && sel.bx < sel.ex)) {
699 selsnap(sel.snap, &sel.bx, &sel.by, -1);
700 selsnap(sel.snap, &sel.ex, &sel.ey, +1);
701 } else {
702 selsnap(sel.snap, &sel.ex, &sel.ey, -1);
703 selsnap(sel.snap, &sel.bx, &sel.by, +1);
704 }
705
706 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
707 sel.b.y = MIN(sel.by, sel.ey);
708 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
709 sel.e.y = MAX(sel.by, sel.ey);
710
711 sel.type = SEL_REGULAR;
712 for(type = 1; type < LEN(selmasks); ++type) {
713 if(match(selmasks[type], state)) {
714 sel.type = type;
715 break;
716 }
717 }
718 }
719
720 void
721 mousereport(XEvent *e) {
722 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
723 button = e->xbutton.button, state = e->xbutton.state,
724 len;
725 char buf[40];
726 static int ob, ox, oy;
727
728 /* from urxvt */
729 if(e->xbutton.type == MotionNotify) {
730 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
731 return;
732 button = ob + 32;
733 ox = x, oy = y;
734 } else if(!IS_SET(MODE_MOUSESGR)
735 && (e->xbutton.type == ButtonRelease
736 || button == AnyButton)) {
737 button = 3;
738 } else {
739 button -= Button1;
740 if(button >= 3)
741 button += 64 - 3;
742 if(e->xbutton.type == ButtonPress) {
743 ob = button;
744 ox = x, oy = y;
745 }
746 }
747
748 button += (state & ShiftMask ? 4 : 0)
749 + (state & Mod4Mask ? 8 : 0)
750 + (state & ControlMask ? 16 : 0);
751
752 len = 0;
753 if(IS_SET(MODE_MOUSESGR)) {
754 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
755 button, x+1, y+1,
756 e->xbutton.type == ButtonRelease ? 'm' : 'M');
757 } else if(x < 223 && y < 223) {
758 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
759 32+button, 32+x+1, 32+y+1);
760 } else {
761 return;
762 }
763
764 ttywrite(buf, len);
765 }
766
767 void
768 bpress(XEvent *e) {
769 struct timeval now;
770
771 if(IS_SET(MODE_MOUSE)) {
772 mousereport(e);
773 } else if(e->xbutton.button == Button1) {
774 gettimeofday(&now, NULL);
775
776 /* Clear previous selection, logically and visually. */
777 if(sel.bx != -1) {
778 sel.bx = -1;
779 tsetdirt(sel.b.y, sel.e.y);
780 draw();
781 }
782 sel.mode = 1;
783 sel.type = SEL_REGULAR;
784 sel.ex = sel.bx = x2col(e->xbutton.x);
785 sel.ey = sel.by = y2row(e->xbutton.y);
786
787 /*
788 * Snap handling.
789 * If user clicks are fasst enough (e.g. below timeouts),
790 * we ignore if his hand slipped left or down and accidentally
791 * selected more; we are just snapping to whatever we're
792 * snapping.
793 */
794 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
795 sel.snap = SNAP_LINE;
796 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
797 sel.snap = SNAP_WORD;
798 } else {
799 sel.snap = 0;
800 }
801 selsnap(sel.snap, &sel.bx, &sel.by, -1);
802 selsnap(sel.snap, &sel.ex, &sel.ey, 1);
803 sel.b.x = sel.bx;
804 sel.b.y = sel.by;
805 sel.e.x = sel.ex;
806 sel.e.y = sel.ey;
807
808 /*
809 * Draw selection, unless it's regular and we don't want to
810 * make clicks visible
811 */
812 if (sel.snap != 0) {
813 tsetdirt(sel.b.y, sel.e.y);
814 draw();
815 }
816 sel.tclick2 = sel.tclick1;
817 sel.tclick1 = now;
818 } else if(e->xbutton.button == Button4) {
819 ttywrite("\031", 1);
820 } else if(e->xbutton.button == Button5) {
821 ttywrite("\005", 1);
822 }
823 }
824
825 void
826 selcopy(void) {
827 char *str, *ptr;
828 int x, y, bufsize, size;
829 Glyph *gp, *last;
830
831 if(sel.bx == -1) {
832 str = NULL;
833 } else {
834 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
835 ptr = str = xmalloc(bufsize);
836
837 /* append every set & selected glyph to the selection */
838 for(y = sel.b.y; y < sel.e.y + 1; y++) {
839 gp = &term.line[y][0];
840 last = gp + term.col;
841
842 while(--last >= gp && !(selected(last - gp, y) && \
843 strcmp(last->c, " ") != 0))
844 /* nothing */;
845
846 for(x = 0; gp <= last; x++, ++gp) {
847 if(!selected(x, y))
848 continue;
849
850 size = utf8size(gp->c);
851 memcpy(ptr, gp->c, size);
852 ptr += size;
853 }
854
855 /*
856 * Copy and pasting of line endings is inconsistent
857 * in the inconsistent terminal and GUI world.
858 * The best solution seems like to produce '\n' when
859 * something is copied from st and convert '\n' to
860 * '\r', when something to be pasted is received by
861 * st.
862 * FIXME: Fix the computer world.
863 */
864 if(y < sel.e.y && !((gp-1)->mode & ATTR_WRAP))
865 *ptr++ = '\n';
866 }
867 *ptr = 0;
868 }
869 xsetsel(str);
870 }
871
872 void
873 selnotify(XEvent *e) {
874 ulong nitems, ofs, rem;
875 int format;
876 uchar *data, *last, *repl;
877 Atom type;
878
879 ofs = 0;
880 do {
881 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
882 False, AnyPropertyType, &type, &format,
883 &nitems, &rem, &data)) {
884 fprintf(stderr, "Clipboard allocation failed\n");
885 return;
886 }
887
888 /*
889 * As seen in selcopy:
890 * Line endings are inconsistent in the terminal and GUI world
891 * copy and pasting. When receiving some selection data,
892 * replace all '\n' with '\r'.
893 * FIXME: Fix the computer world.
894 */
895 repl = data;
896 last = data + nitems * format / 8;
897 while((repl = memchr(repl, '\n', last - repl))) {
898 *repl++ = '\r';
899 }
900
901 ttywrite((const char *)data, nitems * format / 8);
902 XFree(data);
903 /* number of 32-bit chunks returned */
904 ofs += nitems * format / 32;
905 } while(rem > 0);
906 }
907
908 void
909 selpaste(const Arg *dummy) {
910 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
911 xw.win, CurrentTime);
912 }
913
914 void
915 clippaste(const Arg *dummy) {
916 Atom clipboard;
917
918 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
919 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
920 xw.win, CurrentTime);
921 }
922
923 void
924 selclear(XEvent *e) {
925 if(sel.bx == -1)
926 return;
927 sel.bx = -1;
928 tsetdirt(sel.b.y, sel.e.y);
929 }
930
931 void
932 selrequest(XEvent *e) {
933 XSelectionRequestEvent *xsre;
934 XSelectionEvent xev;
935 Atom xa_targets, string;
936
937 xsre = (XSelectionRequestEvent *) e;
938 xev.type = SelectionNotify;
939 xev.requestor = xsre->requestor;
940 xev.selection = xsre->selection;
941 xev.target = xsre->target;
942 xev.time = xsre->time;
943 /* reject */
944 xev.property = None;
945
946 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
947 if(xsre->target == xa_targets) {
948 /* respond with the supported type */
949 string = sel.xtarget;
950 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
951 XA_ATOM, 32, PropModeReplace,
952 (uchar *) &string, 1);
953 xev.property = xsre->property;
954 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
955 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
956 xsre->target, 8, PropModeReplace,
957 (uchar *) sel.clip, strlen(sel.clip));
958 xev.property = xsre->property;
959 }
960
961 /* all done, send a notification to the listener */
962 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
963 fprintf(stderr, "Error sending SelectionNotify event\n");
964 }
965
966 void
967 xsetsel(char *str) {
968 /* register the selection for both the clipboard and the primary */
969 Atom clipboard;
970
971 free(sel.clip);
972 sel.clip = str;
973
974 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
975
976 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
977 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
978 }
979
980 void
981 brelease(XEvent *e) {
982 if(IS_SET(MODE_MOUSE)) {
983 mousereport(e);
984 return;
985 }
986
987 if(e->xbutton.button == Button2) {
988 selpaste(NULL);
989 } else if(e->xbutton.button == Button1) {
990 sel.mode = 0;
991 getbuttoninfo(e);
992 term.dirty[sel.ey] = 1;
993 if(sel.bx == sel.ex && sel.by == sel.ey) {
994 sel.bx = -1;
995 } else {
996 selcopy();
997 }
998 }
999 }
1000
1001 void
1002 bmotion(XEvent *e) {
1003 int oldey, oldex, oldsby, oldsey;
1004
1005 if(IS_SET(MODE_MOUSE)) {
1006 mousereport(e);
1007 return;
1008 }
1009
1010 if(!sel.mode)
1011 return;
1012
1013 oldey = sel.ey;
1014 oldex = sel.ex;
1015 oldsby = sel.b.y;
1016 oldsey = sel.e.y;
1017 getbuttoninfo(e);
1018
1019 if(oldey != sel.ey || oldex != sel.ex) {
1020 tsetdirt(MIN(sel.b.y, oldsby), MAX(sel.e.y, oldsey));
1021 }
1022 }
1023
1024 void
1025 die(const char *errstr, ...) {
1026 va_list ap;
1027
1028 va_start(ap, errstr);
1029 vfprintf(stderr, errstr, ap);
1030 va_end(ap);
1031 exit(EXIT_FAILURE);
1032 }
1033
1034 void
1035 execsh(void) {
1036 char **args;
1037 char *envshell = getenv("SHELL");
1038 const struct passwd *pass = getpwuid(getuid());
1039 char buf[sizeof(long) * 8 + 1];
1040
1041 unsetenv("COLUMNS");
1042 unsetenv("LINES");
1043 unsetenv("TERMCAP");
1044
1045 if(pass) {
1046 setenv("LOGNAME", pass->pw_name, 1);
1047 setenv("USER", pass->pw_name, 1);
1048 setenv("SHELL", pass->pw_shell, 0);
1049 setenv("HOME", pass->pw_dir, 0);
1050 }
1051
1052 snprintf(buf, sizeof(buf), "%lu", xw.win);
1053 setenv("WINDOWID", buf, 1);
1054
1055 signal(SIGCHLD, SIG_DFL);
1056 signal(SIGHUP, SIG_DFL);
1057 signal(SIGINT, SIG_DFL);
1058 signal(SIGQUIT, SIG_DFL);
1059 signal(SIGTERM, SIG_DFL);
1060 signal(SIGALRM, SIG_DFL);
1061
1062 DEFAULT(envshell, shell);
1063 setenv("TERM", termname, 1);
1064 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1065 execvp(args[0], args);
1066 exit(EXIT_FAILURE);
1067 }
1068
1069 void
1070 sigchld(int a) {
1071 int stat = 0;
1072
1073 if(waitpid(pid, &stat, 0) < 0)
1074 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1075
1076 if(WIFEXITED(stat)) {
1077 exit(WEXITSTATUS(stat));
1078 } else {
1079 exit(EXIT_FAILURE);
1080 }
1081 }
1082
1083 void
1084 ttynew(void) {
1085 int m, s;
1086 struct winsize w = {term.row, term.col, 0, 0};
1087
1088 /* seems to work fine on linux, openbsd and freebsd */
1089 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1090 die("openpty failed: %s\n", SERRNO);
1091
1092 switch(pid = fork()) {
1093 case -1:
1094 die("fork failed\n");
1095 break;
1096 case 0:
1097 setsid(); /* create a new process group */
1098 dup2(s, STDIN_FILENO);
1099 dup2(s, STDOUT_FILENO);
1100 dup2(s, STDERR_FILENO);
1101 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1102 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1103 close(s);
1104 close(m);
1105 execsh();
1106 break;
1107 default:
1108 close(s);
1109 cmdfd = m;
1110 signal(SIGCHLD, sigchld);
1111 if(opt_io) {
1112 iofd = (!strcmp(opt_io, "-")) ?
1113 STDOUT_FILENO :
1114 open(opt_io, O_WRONLY | O_CREAT, 0666);
1115 if(iofd < 0) {
1116 fprintf(stderr, "Error opening %s:%s\n",
1117 opt_io, strerror(errno));
1118 }
1119 }
1120 }
1121 }
1122
1123 void
1124 dump(char c) {
1125 static int col;
1126
1127 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1128 if(++col % 10 == 0)
1129 fprintf(stderr, "\n");
1130 }
1131
1132 void
1133 ttyread(void) {
1134 static char buf[BUFSIZ];
1135 static int buflen = 0;
1136 char *ptr;
1137 char s[UTF_SIZ];
1138 int charsize; /* size of utf8 char in bytes */
1139 long utf8c;
1140 int ret;
1141
1142 /* append read bytes to unprocessed bytes */
1143 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1144 die("Couldn't read from shell: %s\n", SERRNO);
1145
1146 /* process every complete utf8 char */
1147 buflen += ret;
1148 ptr = buf;
1149 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1150 charsize = utf8decode(ptr, &utf8c);
1151 utf8encode(&utf8c, s);
1152 tputc(s, charsize);
1153 ptr += charsize;
1154 buflen -= charsize;
1155 }
1156
1157 /* keep any uncomplete utf8 char for the next call */
1158 memmove(buf, ptr, buflen);
1159 }
1160
1161 void
1162 ttywrite(const char *s, size_t n) {
1163 if(write(cmdfd, s, n) == -1)
1164 die("write error on tty: %s\n", SERRNO);
1165 }
1166
1167 void
1168 ttyresize(void) {
1169 struct winsize w;
1170
1171 w.ws_row = term.row;
1172 w.ws_col = term.col;
1173 w.ws_xpixel = xw.tw;
1174 w.ws_ypixel = xw.th;
1175 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1176 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1177 }
1178
1179 void
1180 tsetdirt(int top, int bot) {
1181 int i;
1182
1183 LIMIT(top, 0, term.row-1);
1184 LIMIT(bot, 0, term.row-1);
1185
1186 for(i = top; i <= bot; i++)
1187 term.dirty[i] = 1;
1188 }
1189
1190 void
1191 tfulldirt(void) {
1192 tsetdirt(0, term.row-1);
1193 }
1194
1195 void
1196 tcursor(int mode) {
1197 static TCursor c;
1198
1199 if(mode == CURSOR_SAVE) {
1200 c = term.c;
1201 } else if(mode == CURSOR_LOAD) {
1202 term.c = c;
1203 tmoveto(c.x, c.y);
1204 }
1205 }
1206
1207 void
1208 treset(void) {
1209 uint i;
1210
1211 term.c = (TCursor){{
1212 .mode = ATTR_NULL,
1213 .fg = defaultfg,
1214 .bg = defaultbg
1215 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1216
1217 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1218 for(i = tabspaces; i < term.col; i += tabspaces)
1219 term.tabs[i] = 1;
1220 term.top = 0;
1221 term.bot = term.row - 1;
1222 term.mode = MODE_WRAP;
1223
1224 tclearregion(0, 0, term.col-1, term.row-1);
1225 tmoveto(0, 0);
1226 tcursor(CURSOR_SAVE);
1227 }
1228
1229 void
1230 tnew(int col, int row) {
1231 memset(&term, 0, sizeof(Term));
1232 tresize(col, row);
1233 term.numlock = 1;
1234
1235 treset();
1236 }
1237
1238 void
1239 tswapscreen(void) {
1240 Line *tmp = term.line;
1241
1242 term.line = term.alt;
1243 term.alt = tmp;
1244 term.mode ^= MODE_ALTSCREEN;
1245 tfulldirt();
1246 }
1247
1248 void
1249 tscrolldown(int orig, int n) {
1250 int i;
1251 Line temp;
1252
1253 LIMIT(n, 0, term.bot-orig+1);
1254
1255 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1256
1257 for(i = term.bot; i >= orig+n; i--) {
1258 temp = term.line[i];
1259 term.line[i] = term.line[i-n];
1260 term.line[i-n] = temp;
1261
1262 term.dirty[i] = 1;
1263 term.dirty[i-n] = 1;
1264 }
1265
1266 selscroll(orig, n);
1267 }
1268
1269 void
1270 tscrollup(int orig, int n) {
1271 int i;
1272 Line temp;
1273 LIMIT(n, 0, term.bot-orig+1);
1274
1275 tclearregion(0, orig, term.col-1, orig+n-1);
1276
1277 for(i = orig; i <= term.bot-n; i++) {
1278 temp = term.line[i];
1279 term.line[i] = term.line[i+n];
1280 term.line[i+n] = temp;
1281
1282 term.dirty[i] = 1;
1283 term.dirty[i+n] = 1;
1284 }
1285
1286 selscroll(orig, -n);
1287 }
1288
1289 void
1290 selscroll(int orig, int n) {
1291 if(sel.bx == -1)
1292 return;
1293
1294 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1295 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1296 sel.bx = -1;
1297 return;
1298 }
1299 if(sel.type == SEL_RECTANGULAR) {
1300 if(sel.by < term.top)
1301 sel.by = term.top;
1302 if(sel.ey > term.bot)
1303 sel.ey = term.bot;
1304 } else {
1305 if(sel.by < term.top) {
1306 sel.by = term.top;
1307 sel.bx = 0;
1308 }
1309 if(sel.ey > term.bot) {
1310 sel.ey = term.bot;
1311 sel.ex = term.col;
1312 }
1313 }
1314 sel.b.y = sel.by, sel.b.x = sel.bx;
1315 sel.e.y = sel.ey, sel.e.x = sel.ex;
1316 }
1317 }
1318
1319 void
1320 tnewline(int first_col) {
1321 int y = term.c.y;
1322
1323 if(y == term.bot) {
1324 tscrollup(term.top, 1);
1325 } else {
1326 y++;
1327 }
1328 tmoveto(first_col ? 0 : term.c.x, y);
1329 }
1330
1331 void
1332 csiparse(void) {
1333 char *p = csiescseq.buf, *np;
1334 long int v;
1335
1336 csiescseq.narg = 0;
1337 if(*p == '?') {
1338 csiescseq.priv = 1;
1339 p++;
1340 }
1341
1342 csiescseq.buf[csiescseq.len] = '\0';
1343 while(p < csiescseq.buf+csiescseq.len) {
1344 np = NULL;
1345 v = strtol(p, &np, 10);
1346 if(np == p)
1347 v = 0;
1348 if(v == LONG_MAX || v == LONG_MIN)
1349 v = -1;
1350 csiescseq.arg[csiescseq.narg++] = v;
1351 p = np;
1352 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1353 break;
1354 p++;
1355 }
1356 csiescseq.mode = *p;
1357 }
1358
1359 /* for absolute user moves, when decom is set */
1360 void
1361 tmoveato(int x, int y) {
1362 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1363 }
1364
1365 void
1366 tmoveto(int x, int y) {
1367 int miny, maxy;
1368
1369 if(term.c.state & CURSOR_ORIGIN) {
1370 miny = term.top;
1371 maxy = term.bot;
1372 } else {
1373 miny = 0;
1374 maxy = term.row - 1;
1375 }
1376 LIMIT(x, 0, term.col-1);
1377 LIMIT(y, miny, maxy);
1378 term.c.state &= ~CURSOR_WRAPNEXT;
1379 term.c.x = x;
1380 term.c.y = y;
1381 }
1382
1383 void
1384 tsetchar(char *c, Glyph *attr, int x, int y) {
1385 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1386 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1387 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1388 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1389 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1390 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1391 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1392 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1393 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1394 };
1395
1396 /*
1397 * The table is proudly stolen from rxvt.
1398 */
1399 if(attr->mode & ATTR_GFX) {
1400 if(c[0] >= 0x41 && c[0] <= 0x7e
1401 && vt100_0[c[0] - 0x41]) {
1402 c = vt100_0[c[0] - 0x41];
1403 }
1404 }
1405
1406 term.dirty[y] = 1;
1407 term.line[y][x] = *attr;
1408 memcpy(term.line[y][x].c, c, UTF_SIZ);
1409 }
1410
1411 void
1412 tclearregion(int x1, int y1, int x2, int y2) {
1413 int x, y, temp, mask;
1414
1415 if(x1 > x2)
1416 temp = x1, x1 = x2, x2 = temp;
1417 if(y1 > y2)
1418 temp = y1, y1 = y2, y2 = temp;
1419
1420 LIMIT(x1, 0, term.col-1);
1421 LIMIT(x2, 0, term.col-1);
1422 LIMIT(y1, 0, term.row-1);
1423 LIMIT(y2, 0, term.row-1);
1424
1425 for(y = y1; y <= y2; y++) {
1426 term.dirty[y] = 1;
1427 for(x = x1; x <= x2; x++) {
1428 mask = selected(x, y) ? ATTR_REVERSE : 0;
1429 term.line[y][x] = term.c.attr;
1430 term.line[y][x].mode ^= mask;
1431 memcpy(term.line[y][x].c, " ", 2);
1432 }
1433 }
1434 }
1435
1436 void
1437 tdeletechar(int n) {
1438 int src = term.c.x + n;
1439 int dst = term.c.x;
1440 int size = term.col - src;
1441
1442 term.dirty[term.c.y] = 1;
1443
1444 if(src >= term.col) {
1445 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1446 return;
1447 }
1448
1449 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1450 size * sizeof(Glyph));
1451 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1452 }
1453
1454 void
1455 tinsertblank(int n) {
1456 int src = term.c.x;
1457 int dst = src + n;
1458 int size = term.col - dst;
1459
1460 term.dirty[term.c.y] = 1;
1461
1462 if(dst >= term.col) {
1463 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1464 return;
1465 }
1466
1467 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1468 size * sizeof(Glyph));
1469 tclearregion(src, term.c.y, dst - 1, term.c.y);
1470 }
1471
1472 void
1473 tinsertblankline(int n) {
1474 if(term.c.y < term.top || term.c.y > term.bot)
1475 return;
1476
1477 tscrolldown(term.c.y, n);
1478 }
1479
1480 void
1481 tdeleteline(int n) {
1482 if(term.c.y < term.top || term.c.y > term.bot)
1483 return;
1484
1485 tscrollup(term.c.y, n);
1486 }
1487
1488 void
1489 tsetattr(int *attr, int l) {
1490 int i;
1491
1492 for(i = 0; i < l; i++) {
1493 switch(attr[i]) {
1494 case 0:
1495 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1496 | ATTR_BOLD | ATTR_ITALIC \
1497 | ATTR_BLINK);
1498 term.c.attr.fg = defaultfg;
1499 term.c.attr.bg = defaultbg;
1500 break;
1501 case 1:
1502 term.c.attr.mode |= ATTR_BOLD;
1503 break;
1504 case 3:
1505 term.c.attr.mode |= ATTR_ITALIC;
1506 break;
1507 case 4:
1508 term.c.attr.mode |= ATTR_UNDERLINE;
1509 break;
1510 case 5: /* slow blink */
1511 case 6: /* rapid blink */
1512 term.c.attr.mode |= ATTR_BLINK;
1513 break;
1514 case 7:
1515 term.c.attr.mode |= ATTR_REVERSE;
1516 break;
1517 case 21:
1518 case 22:
1519 term.c.attr.mode &= ~ATTR_BOLD;
1520 break;
1521 case 23:
1522 term.c.attr.mode &= ~ATTR_ITALIC;
1523 break;
1524 case 24:
1525 term.c.attr.mode &= ~ATTR_UNDERLINE;
1526 break;
1527 case 25:
1528 case 26:
1529 term.c.attr.mode &= ~ATTR_BLINK;
1530 break;
1531 case 27:
1532 term.c.attr.mode &= ~ATTR_REVERSE;
1533 break;
1534 case 38:
1535 if(i + 2 < l && attr[i + 1] == 5) {
1536 i += 2;
1537 if(BETWEEN(attr[i], 0, 255)) {
1538 term.c.attr.fg = attr[i];
1539 } else {
1540 fprintf(stderr,
1541 "erresc: bad fgcolor %d\n",
1542 attr[i]);
1543 }
1544 } else {
1545 fprintf(stderr,
1546 "erresc(38): gfx attr %d unknown\n",
1547 attr[i]);
1548 }
1549 break;
1550 case 39:
1551 term.c.attr.fg = defaultfg;
1552 break;
1553 case 48:
1554 if(i + 2 < l && attr[i + 1] == 5) {
1555 i += 2;
1556 if(BETWEEN(attr[i], 0, 255)) {
1557 term.c.attr.bg = attr[i];
1558 } else {
1559 fprintf(stderr,
1560 "erresc: bad bgcolor %d\n",
1561 attr[i]);
1562 }
1563 } else {
1564 fprintf(stderr,
1565 "erresc(48): gfx attr %d unknown\n",
1566 attr[i]);
1567 }
1568 break;
1569 case 49:
1570 term.c.attr.bg = defaultbg;
1571 break;
1572 default:
1573 if(BETWEEN(attr[i], 30, 37)) {
1574 term.c.attr.fg = attr[i] - 30;
1575 } else if(BETWEEN(attr[i], 40, 47)) {
1576 term.c.attr.bg = attr[i] - 40;
1577 } else if(BETWEEN(attr[i], 90, 97)) {
1578 term.c.attr.fg = attr[i] - 90 + 8;
1579 } else if(BETWEEN(attr[i], 100, 107)) {
1580 term.c.attr.bg = attr[i] - 100 + 8;
1581 } else {
1582 fprintf(stderr,
1583 "erresc(default): gfx attr %d unknown\n",
1584 attr[i]), csidump();
1585 }
1586 break;
1587 }
1588 }
1589 }
1590
1591 void
1592 tsetscroll(int t, int b) {
1593 int temp;
1594
1595 LIMIT(t, 0, term.row-1);
1596 LIMIT(b, 0, term.row-1);
1597 if(t > b) {
1598 temp = t;
1599 t = b;
1600 b = temp;
1601 }
1602 term.top = t;
1603 term.bot = b;
1604 }
1605
1606 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1607
1608 void
1609 tsetmode(bool priv, bool set, int *args, int narg) {
1610 int *lim, mode;
1611 bool alt;
1612
1613 for(lim = args + narg; args < lim; ++args) {
1614 if(priv) {
1615 switch(*args) {
1616 break;
1617 case 1: /* DECCKM -- Cursor key */
1618 MODBIT(term.mode, set, MODE_APPCURSOR);
1619 break;
1620 case 5: /* DECSCNM -- Reverse video */
1621 mode = term.mode;
1622 MODBIT(term.mode, set, MODE_REVERSE);
1623 if(mode != term.mode)
1624 redraw(REDRAW_TIMEOUT);
1625 break;
1626 case 6: /* DECOM -- Origin */
1627 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1628 tmoveato(0, 0);
1629 break;
1630 case 7: /* DECAWM -- Auto wrap */
1631 MODBIT(term.mode, set, MODE_WRAP);
1632 break;
1633 case 0: /* Error (IGNORED) */
1634 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1635 case 3: /* DECCOLM -- Column (IGNORED) */
1636 case 4: /* DECSCLM -- Scroll (IGNORED) */
1637 case 8: /* DECARM -- Auto repeat (IGNORED) */
1638 case 18: /* DECPFF -- Printer feed (IGNORED) */
1639 case 19: /* DECPEX -- Printer extent (IGNORED) */
1640 case 42: /* DECNRCM -- National characters (IGNORED) */
1641 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1642 break;
1643 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1644 MODBIT(term.mode, !set, MODE_HIDE);
1645 break;
1646 case 1000: /* 1000,1002: enable xterm mouse report */
1647 MODBIT(term.mode, set, MODE_MOUSEBTN);
1648 MODBIT(term.mode, 0, MODE_MOUSEMOTION);
1649 break;
1650 case 1002:
1651 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1652 MODBIT(term.mode, 0, MODE_MOUSEBTN);
1653 break;
1654 case 1006:
1655 MODBIT(term.mode, set, MODE_MOUSESGR);
1656 break;
1657 case 1034:
1658 MODBIT(term.mode, set, MODE_8BIT);
1659 break;
1660 case 1049: /* = 1047 and 1048 */
1661 case 47:
1662 case 1047:
1663 if (!allowaltscreen)
1664 break;
1665
1666 alt = IS_SET(MODE_ALTSCREEN);
1667 if(alt) {
1668 tclearregion(0, 0, term.col-1,
1669 term.row-1);
1670 }
1671 if(set ^ alt) /* set is always 1 or 0 */
1672 tswapscreen();
1673 if(*args != 1049)
1674 break;
1675 /* FALLTRU */
1676 case 1048:
1677 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1678 break;
1679 default:
1680 fprintf(stderr,
1681 "erresc: unknown private set/reset mode %d\n",
1682 *args);
1683 break;
1684 }
1685 } else {
1686 switch(*args) {
1687 case 0: /* Error (IGNORED) */
1688 break;
1689 case 2: /* KAM -- keyboard action */
1690 MODBIT(term.mode, set, MODE_KBDLOCK);
1691 break;
1692 case 4: /* IRM -- Insertion-replacement */
1693 MODBIT(term.mode, set, MODE_INSERT);
1694 break;
1695 case 12: /* SRM -- Send/Receive */
1696 MODBIT(term.mode, !set, MODE_ECHO);
1697 break;
1698 case 20: /* LNM -- Linefeed/new line */
1699 MODBIT(term.mode, set, MODE_CRLF);
1700 break;
1701 default:
1702 fprintf(stderr,
1703 "erresc: unknown set/reset mode %d\n",
1704 *args);
1705 break;
1706 }
1707 }
1708 }
1709 }
1710 #undef MODBIT
1711
1712
1713 void
1714 csihandle(void) {
1715 switch(csiescseq.mode) {
1716 default:
1717 unknown:
1718 fprintf(stderr, "erresc: unknown csi ");
1719 csidump();
1720 /* die(""); */
1721 break;
1722 case '@': /* ICH -- Insert <n> blank char */
1723 DEFAULT(csiescseq.arg[0], 1);
1724 tinsertblank(csiescseq.arg[0]);
1725 break;
1726 case 'A': /* CUU -- Cursor <n> Up */
1727 DEFAULT(csiescseq.arg[0], 1);
1728 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1729 break;
1730 case 'B': /* CUD -- Cursor <n> Down */
1731 case 'e': /* VPR --Cursor <n> Down */
1732 DEFAULT(csiescseq.arg[0], 1);
1733 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1734 break;
1735 case 'c': /* DA -- Device Attributes */
1736 if(csiescseq.arg[0] == 0)
1737 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1738 break;
1739 case 'C': /* CUF -- Cursor <n> Forward */
1740 case 'a': /* HPR -- Cursor <n> Forward */
1741 DEFAULT(csiescseq.arg[0], 1);
1742 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1743 break;
1744 case 'D': /* CUB -- Cursor <n> Backward */
1745 DEFAULT(csiescseq.arg[0], 1);
1746 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1747 break;
1748 case 'E': /* CNL -- Cursor <n> Down and first col */
1749 DEFAULT(csiescseq.arg[0], 1);
1750 tmoveto(0, term.c.y+csiescseq.arg[0]);
1751 break;
1752 case 'F': /* CPL -- Cursor <n> Up and first col */
1753 DEFAULT(csiescseq.arg[0], 1);
1754 tmoveto(0, term.c.y-csiescseq.arg[0]);
1755 break;
1756 case 'g': /* TBC -- Tabulation clear */
1757 switch(csiescseq.arg[0]) {
1758 case 0: /* clear current tab stop */
1759 term.tabs[term.c.x] = 0;
1760 break;
1761 case 3: /* clear all the tabs */
1762 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1763 break;
1764 default:
1765 goto unknown;
1766 }
1767 break;
1768 case 'G': /* CHA -- Move to <col> */
1769 case '`': /* HPA */
1770 DEFAULT(csiescseq.arg[0], 1);
1771 tmoveto(csiescseq.arg[0]-1, term.c.y);
1772 break;
1773 case 'H': /* CUP -- Move to <row> <col> */
1774 case 'f': /* HVP */
1775 DEFAULT(csiescseq.arg[0], 1);
1776 DEFAULT(csiescseq.arg[1], 1);
1777 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1778 break;
1779 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1780 DEFAULT(csiescseq.arg[0], 1);
1781 while(csiescseq.arg[0]--)
1782 tputtab(1);
1783 break;
1784 case 'J': /* ED -- Clear screen */
1785 sel.bx = -1;
1786 switch(csiescseq.arg[0]) {
1787 case 0: /* below */
1788 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1789 if(term.c.y < term.row-1) {
1790 tclearregion(0, term.c.y+1, term.col-1,
1791 term.row-1);
1792 }
1793 break;
1794 case 1: /* above */
1795 if(term.c.y > 1)
1796 tclearregion(0, 0, term.col-1, term.c.y-1);
1797 tclearregion(0, term.c.y, term.c.x, term.c.y);
1798 break;
1799 case 2: /* all */
1800 tclearregion(0, 0, term.col-1, term.row-1);
1801 break;
1802 default:
1803 goto unknown;
1804 }
1805 break;
1806 case 'K': /* EL -- Clear line */
1807 switch(csiescseq.arg[0]) {
1808 case 0: /* right */
1809 tclearregion(term.c.x, term.c.y, term.col-1,
1810 term.c.y);
1811 break;
1812 case 1: /* left */
1813 tclearregion(0, term.c.y, term.c.x, term.c.y);
1814 break;
1815 case 2: /* all */
1816 tclearregion(0, term.c.y, term.col-1, term.c.y);
1817 break;
1818 }
1819 break;
1820 case 'S': /* SU -- Scroll <n> line up */
1821 DEFAULT(csiescseq.arg[0], 1);
1822 tscrollup(term.top, csiescseq.arg[0]);
1823 break;
1824 case 'T': /* SD -- Scroll <n> line down */
1825 DEFAULT(csiescseq.arg[0], 1);
1826 tscrolldown(term.top, csiescseq.arg[0]);
1827 break;
1828 case 'L': /* IL -- Insert <n> blank lines */
1829 DEFAULT(csiescseq.arg[0], 1);
1830 tinsertblankline(csiescseq.arg[0]);
1831 break;
1832 case 'l': /* RM -- Reset Mode */
1833 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1834 break;
1835 case 'M': /* DL -- Delete <n> lines */
1836 DEFAULT(csiescseq.arg[0], 1);
1837 tdeleteline(csiescseq.arg[0]);
1838 break;
1839 case 'X': /* ECH -- Erase <n> char */
1840 DEFAULT(csiescseq.arg[0], 1);
1841 tclearregion(term.c.x, term.c.y,
1842 term.c.x + csiescseq.arg[0] - 1, term.c.y);
1843 break;
1844 case 'P': /* DCH -- Delete <n> char */
1845 DEFAULT(csiescseq.arg[0], 1);
1846 tdeletechar(csiescseq.arg[0]);
1847 break;
1848 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1849 DEFAULT(csiescseq.arg[0], 1);
1850 while(csiescseq.arg[0]--)
1851 tputtab(0);
1852 break;
1853 case 'd': /* VPA -- Move to <row> */
1854 DEFAULT(csiescseq.arg[0], 1);
1855 tmoveato(term.c.x, csiescseq.arg[0]-1);
1856 break;
1857 case 'h': /* SM -- Set terminal mode */
1858 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1859 break;
1860 case 'm': /* SGR -- Terminal attribute (color) */
1861 tsetattr(csiescseq.arg, csiescseq.narg);
1862 break;
1863 case 'r': /* DECSTBM -- Set Scrolling Region */
1864 if(csiescseq.priv) {
1865 goto unknown;
1866 } else {
1867 DEFAULT(csiescseq.arg[0], 1);
1868 DEFAULT(csiescseq.arg[1], term.row);
1869 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1870 tmoveato(0, 0);
1871 }
1872 break;
1873 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1874 tcursor(CURSOR_SAVE);
1875 break;
1876 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1877 tcursor(CURSOR_LOAD);
1878 break;
1879 }
1880 }
1881
1882 void
1883 csidump(void) {
1884 int i;
1885 uint c;
1886
1887 printf("ESC[");
1888 for(i = 0; i < csiescseq.len; i++) {
1889 c = csiescseq.buf[i] & 0xff;
1890 if(isprint(c)) {
1891 putchar(c);
1892 } else if(c == '\n') {
1893 printf("(\\n)");
1894 } else if(c == '\r') {
1895 printf("(\\r)");
1896 } else if(c == 0x1b) {
1897 printf("(\\e)");
1898 } else {
1899 printf("(%02x)", c);
1900 }
1901 }
1902 putchar('\n');
1903 }
1904
1905 void
1906 csireset(void) {
1907 memset(&csiescseq, 0, sizeof(csiescseq));
1908 }
1909
1910 void
1911 strhandle(void) {
1912 char *p = NULL;
1913 int i, j, narg;
1914
1915 strparse();
1916 narg = strescseq.narg;
1917
1918 switch(strescseq.type) {
1919 case ']': /* OSC -- Operating System Command */
1920 switch(i = atoi(strescseq.args[0])) {
1921 case 0:
1922 case 1:
1923 case 2:
1924 if(narg > 1)
1925 xsettitle(strescseq.args[1]);
1926 break;
1927 case 4: /* color set */
1928 if(narg < 3)
1929 break;
1930 p = strescseq.args[2];
1931 /* fall through */
1932 case 104: /* color reset, here p = NULL */
1933 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
1934 if (!xsetcolorname(j, p)) {
1935 fprintf(stderr, "erresc: invalid color %s\n", p);
1936 } else {
1937 /*
1938 * TODO if defaultbg color is changed, borders
1939 * are dirty
1940 */
1941 redraw(0);
1942 }
1943 break;
1944 default:
1945 fprintf(stderr, "erresc: unknown str ");
1946 strdump();
1947 break;
1948 }
1949 break;
1950 case 'k': /* old title set compatibility */
1951 xsettitle(strescseq.args[0]);
1952 break;
1953 case 'P': /* DSC -- Device Control String */
1954 case '_': /* APC -- Application Program Command */
1955 case '^': /* PM -- Privacy Message */
1956 default:
1957 fprintf(stderr, "erresc: unknown str ");
1958 strdump();
1959 /* die(""); */
1960 break;
1961 }
1962 }
1963
1964 void
1965 strparse(void) {
1966 char *p = strescseq.buf;
1967
1968 strescseq.narg = 0;
1969 strescseq.buf[strescseq.len] = '\0';
1970 while(p && strescseq.narg < STR_ARG_SIZ)
1971 strescseq.args[strescseq.narg++] = strsep(&p, ";");
1972 }
1973
1974 void
1975 strdump(void) {
1976 int i;
1977 uint c;
1978
1979 printf("ESC%c", strescseq.type);
1980 for(i = 0; i < strescseq.len; i++) {
1981 c = strescseq.buf[i] & 0xff;
1982 if(c == '\0') {
1983 return;
1984 } else if(isprint(c)) {
1985 putchar(c);
1986 } else if(c == '\n') {
1987 printf("(\\n)");
1988 } else if(c == '\r') {
1989 printf("(\\r)");
1990 } else if(c == 0x1b) {
1991 printf("(\\e)");
1992 } else {
1993 printf("(%02x)", c);
1994 }
1995 }
1996 printf("ESC\\\n");
1997 }
1998
1999 void
2000 strreset(void) {
2001 memset(&strescseq, 0, sizeof(strescseq));
2002 }
2003
2004 void
2005 tputtab(bool forward) {
2006 uint x = term.c.x;
2007
2008 if(forward) {
2009 if(x == term.col)
2010 return;
2011 for(++x; x < term.col && !term.tabs[x]; ++x)
2012 /* nothing */ ;
2013 } else {
2014 if(x == 0)
2015 return;
2016 for(--x; x > 0 && !term.tabs[x]; --x)
2017 /* nothing */ ;
2018 }
2019 tmoveto(x, term.c.y);
2020 }
2021
2022 void
2023 techo(char *buf, int len) {
2024 for(; len > 0; buf++, len--) {
2025 char c = *buf;
2026
2027 if(c == '\033') { /* escape */
2028 tputc("^", 1);
2029 tputc("[", 1);
2030 } else if(c < '\x20') { /* control code */
2031 if(c != '\n' && c != '\r' && c != '\t') {
2032 c |= '\x40';
2033 tputc("^", 1);
2034 }
2035 tputc(&c, 1);
2036 } else {
2037 break;
2038 }
2039 }
2040 if(len)
2041 tputc(buf, len);
2042 }
2043
2044 void
2045 tputc(char *c, int len) {
2046 uchar ascii = *c;
2047 bool control = ascii < '\x20' || ascii == 0177;
2048
2049 if(iofd != -1) {
2050 if(xwrite(iofd, c, len) < 0) {
2051 fprintf(stderr, "Error writing in %s:%s\n",
2052 opt_io, strerror(errno));
2053 close(iofd);
2054 iofd = -1;
2055 }
2056 }
2057
2058 /*
2059 * STR sequences must be checked before anything else
2060 * because it can use some control codes as part of the sequence.
2061 */
2062 if(term.esc & ESC_STR) {
2063 switch(ascii) {
2064 case '\033':
2065 term.esc = ESC_START | ESC_STR_END;
2066 break;
2067 case '\a': /* backwards compatibility to xterm */
2068 term.esc = 0;
2069 strhandle();
2070 break;
2071 default:
2072 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2073 memmove(&strescseq.buf[strescseq.len], c, len);
2074 strescseq.len += len;
2075 } else {
2076 /*
2077 * Here is a bug in terminals. If the user never sends
2078 * some code to stop the str or esc command, then st
2079 * will stop responding. But this is better than
2080 * silently failing with unknown characters. At least
2081 * then users will report back.
2082 *
2083 * In the case users ever get fixed, here is the code:
2084 */
2085 /*
2086 * term.esc = 0;
2087 * strhandle();
2088 */
2089 }
2090 }
2091 return;
2092 }
2093
2094 /*
2095 * Actions of control codes must be performed as soon they arrive
2096 * because they can be embedded inside a control sequence, and
2097 * they must not cause conflicts with sequences.
2098 */
2099 if(control) {
2100 switch(ascii) {
2101 case '\t': /* HT */
2102 tputtab(1);
2103 return;
2104 case '\b': /* BS */
2105 tmoveto(term.c.x-1, term.c.y);
2106 return;
2107 case '\r': /* CR */
2108 tmoveto(0, term.c.y);
2109 return;
2110 case '\f': /* LF */
2111 case '\v': /* VT */
2112 case '\n': /* LF */
2113 /* go to first col if the mode is set */
2114 tnewline(IS_SET(MODE_CRLF));
2115 return;
2116 case '\a': /* BEL */
2117 if(!(xw.state & WIN_FOCUSED))
2118 xseturgency(1);
2119 return;
2120 case '\033': /* ESC */
2121 csireset();
2122 term.esc = ESC_START;
2123 return;
2124 case '\016': /* SO */
2125 case '\017': /* SI */
2126 /*
2127 * Different charsets are hard to handle. Applications
2128 * should use the right alt charset escapes for the
2129 * only reason they still exist: line drawing. The
2130 * rest is incompatible history st should not support.
2131 */
2132 return;
2133 case '\032': /* SUB */
2134 case '\030': /* CAN */
2135 csireset();
2136 return;
2137 case '\005': /* ENQ (IGNORED) */
2138 case '\000': /* NUL (IGNORED) */
2139 case '\021': /* XON (IGNORED) */
2140 case '\023': /* XOFF (IGNORED) */
2141 case 0177: /* DEL (IGNORED) */
2142 return;
2143 }
2144 } else if(term.esc & ESC_START) {
2145 if(term.esc & ESC_CSI) {
2146 csiescseq.buf[csiescseq.len++] = ascii;
2147 if(BETWEEN(ascii, 0x40, 0x7E)
2148 || csiescseq.len >= \
2149 sizeof(csiescseq.buf)-1) {
2150 term.esc = 0;
2151 csiparse();
2152 csihandle();
2153 }
2154 } else if(term.esc & ESC_STR_END) {
2155 term.esc = 0;
2156 if(ascii == '\\')
2157 strhandle();
2158 } else if(term.esc & ESC_ALTCHARSET) {
2159 switch(ascii) {
2160 case '0': /* Line drawing set */
2161 term.c.attr.mode |= ATTR_GFX;
2162 break;
2163 case 'B': /* USASCII */
2164 term.c.attr.mode &= ~ATTR_GFX;
2165 break;
2166 case 'A': /* UK (IGNORED) */
2167 case '<': /* multinational charset (IGNORED) */
2168 case '5': /* Finnish (IGNORED) */
2169 case 'C': /* Finnish (IGNORED) */
2170 case 'K': /* German (IGNORED) */
2171 break;
2172 default:
2173 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2174 }
2175 term.esc = 0;
2176 } else if(term.esc & ESC_TEST) {
2177 if(ascii == '8') { /* DEC screen alignment test. */
2178 char E[UTF_SIZ] = "E";
2179 int x, y;
2180
2181 for(x = 0; x < term.col; ++x) {
2182 for(y = 0; y < term.row; ++y)
2183 tsetchar(E, &term.c.attr, x, y);
2184 }
2185 }
2186 term.esc = 0;
2187 } else {
2188 switch(ascii) {
2189 case '[':
2190 term.esc |= ESC_CSI;
2191 break;
2192 case '#':
2193 term.esc |= ESC_TEST;
2194 break;
2195 case 'P': /* DCS -- Device Control String */
2196 case '_': /* APC -- Application Program Command */
2197 case '^': /* PM -- Privacy Message */
2198 case ']': /* OSC -- Operating System Command */
2199 case 'k': /* old title set compatibility */
2200 strreset();
2201 strescseq.type = ascii;
2202 term.esc |= ESC_STR;
2203 break;
2204 case '(': /* set primary charset G0 */
2205 term.esc |= ESC_ALTCHARSET;
2206 break;
2207 case ')': /* set secondary charset G1 (IGNORED) */
2208 case '*': /* set tertiary charset G2 (IGNORED) */
2209 case '+': /* set quaternary charset G3 (IGNORED) */
2210 term.esc = 0;
2211 break;
2212 case 'D': /* IND -- Linefeed */
2213 if(term.c.y == term.bot) {
2214 tscrollup(term.top, 1);
2215 } else {
2216 tmoveto(term.c.x, term.c.y+1);
2217 }
2218 term.esc = 0;
2219 break;
2220 case 'E': /* NEL -- Next line */
2221 tnewline(1); /* always go to first col */
2222 term.esc = 0;
2223 break;
2224 case 'H': /* HTS -- Horizontal tab stop */
2225 term.tabs[term.c.x] = 1;
2226 term.esc = 0;
2227 break;
2228 case 'M': /* RI -- Reverse index */
2229 if(term.c.y == term.top) {
2230 tscrolldown(term.top, 1);
2231 } else {
2232 tmoveto(term.c.x, term.c.y-1);
2233 }
2234 term.esc = 0;
2235 break;
2236 case 'Z': /* DECID -- Identify Terminal */
2237 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2238 term.esc = 0;
2239 break;
2240 case 'c': /* RIS -- Reset to inital state */
2241 treset();
2242 term.esc = 0;
2243 xresettitle();
2244 break;
2245 case '=': /* DECPAM -- Application keypad */
2246 term.mode |= MODE_APPKEYPAD;
2247 term.esc = 0;
2248 break;
2249 case '>': /* DECPNM -- Normal keypad */
2250 term.mode &= ~MODE_APPKEYPAD;
2251 term.esc = 0;
2252 break;
2253 case '7': /* DECSC -- Save Cursor */
2254 tcursor(CURSOR_SAVE);
2255 term.esc = 0;
2256 break;
2257 case '8': /* DECRC -- Restore Cursor */
2258 tcursor(CURSOR_LOAD);
2259 term.esc = 0;
2260 break;
2261 case '\\': /* ST -- Stop */
2262 term.esc = 0;
2263 break;
2264 default:
2265 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2266 (uchar) ascii, isprint(ascii)? ascii:'.');
2267 term.esc = 0;
2268 }
2269 }
2270 /*
2271 * All characters which form part of a sequence are not
2272 * printed
2273 */
2274 return;
2275 }
2276 /*
2277 * Display control codes only if we are in graphic mode
2278 */
2279 if(control && !(term.c.attr.mode & ATTR_GFX))
2280 return;
2281 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2282 sel.bx = -1;
2283 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2284 term.line[term.c.y][term.c.x].mode |= ATTR_WRAP;
2285 tnewline(1);
2286 }
2287
2288 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2289 memmove(&term.line[term.c.y][term.c.x+1],
2290 &term.line[term.c.y][term.c.x],
2291 (term.col - term.c.x - 1) * sizeof(Glyph));
2292 }
2293
2294 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2295 if(term.c.x+1 < term.col) {
2296 tmoveto(term.c.x+1, term.c.y);
2297 } else {
2298 term.c.state |= CURSOR_WRAPNEXT;
2299 }
2300 }
2301
2302 int
2303 tresize(int col, int row) {
2304 int i;
2305 int minrow = MIN(row, term.row);
2306 int mincol = MIN(col, term.col);
2307 int slide = term.c.y - row + 1;
2308 bool *bp;
2309 Line *orig;
2310
2311 if(col < 1 || row < 1)
2312 return 0;
2313
2314 /* free unneeded rows */
2315 i = 0;
2316 if(slide > 0) {
2317 /*
2318 * slide screen to keep cursor where we expect it -
2319 * tscrollup would work here, but we can optimize to
2320 * memmove because we're freeing the earlier lines
2321 */
2322 for(/* i = 0 */; i < slide; i++) {
2323 free(term.line[i]);
2324 free(term.alt[i]);
2325 }
2326 memmove(term.line, term.line + slide, row * sizeof(Line));
2327 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2328 }
2329 for(i += row; i < term.row; i++) {
2330 free(term.line[i]);
2331 free(term.alt[i]);
2332 }
2333
2334 /* resize to new height */
2335 term.line = xrealloc(term.line, row * sizeof(Line));
2336 term.alt = xrealloc(term.alt, row * sizeof(Line));
2337 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2338 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2339
2340 /* resize each row to new width, zero-pad if needed */
2341 for(i = 0; i < minrow; i++) {
2342 term.dirty[i] = 1;
2343 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2344 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2345 }
2346
2347 /* allocate any new rows */
2348 for(/* i == minrow */; i < row; i++) {
2349 term.dirty[i] = 1;
2350 term.line[i] = xcalloc(col, sizeof(Glyph));
2351 term.alt [i] = xcalloc(col, sizeof(Glyph));
2352 }
2353 if(col > term.col) {
2354 bp = term.tabs + term.col;
2355
2356 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2357 while(--bp > term.tabs && !*bp)
2358 /* nothing */ ;
2359 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2360 *bp = 1;
2361 }
2362 /* update terminal size */
2363 term.col = col;
2364 term.row = row;
2365 /* reset scrolling region */
2366 tsetscroll(0, row-1);
2367 /* make use of the LIMIT in tmoveto */
2368 tmoveto(term.c.x, term.c.y);
2369 /* Clearing both screens */
2370 orig = term.line;
2371 do {
2372 if(mincol < col && 0 < minrow) {
2373 tclearregion(mincol, 0, col - 1, minrow - 1);
2374 }
2375 if(0 < col && minrow < row) {
2376 tclearregion(0, minrow, col - 1, row - 1);
2377 }
2378 tswapscreen();
2379 } while(orig != term.line);
2380
2381 return (slide > 0);
2382 }
2383
2384 void
2385 xresize(int col, int row) {
2386 xw.tw = MAX(1, col * xw.cw);
2387 xw.th = MAX(1, row * xw.ch);
2388
2389 XFreePixmap(xw.dpy, xw.buf);
2390 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2391 DefaultDepth(xw.dpy, xw.scr));
2392 XftDrawChange(xw.draw, xw.buf);
2393 xclear(0, 0, xw.w, xw.h);
2394 }
2395
2396 static inline ushort
2397 sixd_to_16bit(int x) {
2398 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2399 }
2400
2401 void
2402 xloadcols(void) {
2403 int i, r, g, b;
2404 XRenderColor color = { .alpha = 0xffff };
2405
2406 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2407 for(i = 0; i < LEN(colorname); i++) {
2408 if(!colorname[i])
2409 continue;
2410 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2411 die("Could not allocate color '%s'\n", colorname[i]);
2412 }
2413 }
2414
2415 /* load colors [16-255] ; same colors as xterm */
2416 for(i = 16, r = 0; r < 6; r++) {
2417 for(g = 0; g < 6; g++) {
2418 for(b = 0; b < 6; b++) {
2419 color.red = sixd_to_16bit(r);
2420 color.green = sixd_to_16bit(g);
2421 color.blue = sixd_to_16bit(b);
2422 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2423 die("Could not allocate color %d\n", i);
2424 }
2425 i++;
2426 }
2427 }
2428 }
2429
2430 for(r = 0; r < 24; r++, i++) {
2431 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2432 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2433 &dc.col[i])) {
2434 die("Could not allocate color %d\n", i);
2435 }
2436 }
2437 }
2438
2439 int
2440 xsetcolorname(int x, const char *name) {
2441 XRenderColor color = { .alpha = 0xffff };
2442 Colour colour;
2443 if (x < 0 || x > LEN(colorname))
2444 return -1;
2445 if(!name) {
2446 if(16 <= x && x < 16 + 216) {
2447 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2448 color.red = sixd_to_16bit(r);
2449 color.green = sixd_to_16bit(g);
2450 color.blue = sixd_to_16bit(b);
2451 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2452 return 0; /* something went wrong */
2453 dc.col[x] = colour;
2454 return 1;
2455 } else if (16 + 216 <= x && x < 256) {
2456 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2457 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2458 return 0; /* something went wrong */
2459 dc.col[x] = colour;
2460 return 1;
2461 } else {
2462 name = colorname[x];
2463 }
2464 }
2465 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2466 return 0;
2467 dc.col[x] = colour;
2468 return 1;
2469 }
2470
2471 void
2472 xtermclear(int col1, int row1, int col2, int row2) {
2473 XftDrawRect(xw.draw,
2474 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2475 borderpx + col1 * xw.cw,
2476 borderpx + row1 * xw.ch,
2477 (col2-col1+1) * xw.cw,
2478 (row2-row1+1) * xw.ch);
2479 }
2480
2481 /*
2482 * Absolute coordinates.
2483 */
2484 void
2485 xclear(int x1, int y1, int x2, int y2) {
2486 XftDrawRect(xw.draw,
2487 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2488 x1, y1, x2-x1, y2-y1);
2489 }
2490
2491 void
2492 xhints(void) {
2493 XClassHint class = {opt_class ? opt_class : termname, termname};
2494 XWMHints wm = {.flags = InputHint, .input = 1};
2495 XSizeHints *sizeh = NULL;
2496
2497 sizeh = XAllocSizeHints();
2498 if(xw.isfixed == False) {
2499 sizeh->flags = PSize | PResizeInc | PBaseSize;
2500 sizeh->height = xw.h;
2501 sizeh->width = xw.w;
2502 sizeh->height_inc = xw.ch;
2503 sizeh->width_inc = xw.cw;
2504 sizeh->base_height = 2 * borderpx;
2505 sizeh->base_width = 2 * borderpx;
2506 } else {
2507 sizeh->flags = PMaxSize | PMinSize;
2508 sizeh->min_width = sizeh->max_width = xw.fw;
2509 sizeh->min_height = sizeh->max_height = xw.fh;
2510 }
2511
2512 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2513 XFree(sizeh);
2514 }
2515
2516 int
2517 xloadfont(Font *f, FcPattern *pattern) {
2518 FcPattern *match;
2519 FcResult result;
2520
2521 match = FcFontMatch(NULL, pattern, &result);
2522 if(!match)
2523 return 1;
2524
2525 if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
2526 FcPatternDestroy(match);
2527 return 1;
2528 }
2529
2530 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2531 FcPatternDestroy(match);
2532 return 1;
2533 }
2534
2535 f->pattern = FcPatternDuplicate(pattern);
2536
2537 f->ascent = f->match->ascent;
2538 f->descent = f->match->descent;
2539 f->lbearing = 0;
2540 f->rbearing = f->match->max_advance_width;
2541
2542 f->height = f->ascent + f->descent;
2543 f->width = f->lbearing + f->rbearing;
2544
2545 return 0;
2546 }
2547
2548 void
2549 xloadfonts(char *fontstr, int fontsize) {
2550 FcPattern *pattern;
2551 FcResult result;
2552 double fontval;
2553
2554 if(fontstr[0] == '-') {
2555 pattern = XftXlfdParse(fontstr, False, False);
2556 } else {
2557 pattern = FcNameParse((FcChar8 *)fontstr);
2558 }
2559
2560 if(!pattern)
2561 die("st: can't open font %s\n", fontstr);
2562
2563 if(fontsize > 0) {
2564 FcPatternDel(pattern, FC_PIXEL_SIZE);
2565 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2566 usedfontsize = fontsize;
2567 } else {
2568 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2569 if(result == FcResultMatch) {
2570 usedfontsize = (int)fontval;
2571 } else {
2572 /*
2573 * Default font size is 12, if none given. This is to
2574 * have a known usedfontsize value.
2575 */
2576 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2577 usedfontsize = 12;
2578 }
2579 }
2580
2581 FcConfigSubstitute(0, pattern, FcMatchPattern);
2582 FcDefaultSubstitute(pattern);
2583
2584 if(xloadfont(&dc.font, pattern))
2585 die("st: can't open font %s\n", fontstr);
2586
2587 /* Setting character width and height. */
2588 xw.cw = dc.font.width;
2589 xw.ch = dc.font.height;
2590
2591 FcPatternDel(pattern, FC_SLANT);
2592 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2593 if(xloadfont(&dc.ifont, pattern))
2594 die("st: can't open font %s\n", fontstr);
2595
2596 FcPatternDel(pattern, FC_WEIGHT);
2597 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2598 if(xloadfont(&dc.ibfont, pattern))
2599 die("st: can't open font %s\n", fontstr);
2600
2601 FcPatternDel(pattern, FC_SLANT);
2602 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2603 if(xloadfont(&dc.bfont, pattern))
2604 die("st: can't open font %s\n", fontstr);
2605
2606 FcPatternDestroy(pattern);
2607 }
2608
2609 void
2610 xunloadfonts(void) {
2611 int i, ip;
2612
2613 /*
2614 * Free the loaded fonts in the font cache. This is done backwards
2615 * from the frccur.
2616 */
2617 for(i = 0, ip = frccur; i < frclen; i++, ip--) {
2618 if(ip < 0)
2619 ip = LEN(frc) - 1;
2620 XftFontClose(xw.dpy, frc[ip].font);
2621 }
2622 frccur = -1;
2623 frclen = 0;
2624
2625 XftFontClose(xw.dpy, dc.font.match);
2626 FcPatternDestroy(dc.font.pattern);
2627 FcFontSetDestroy(dc.font.set);
2628 XftFontClose(xw.dpy, dc.bfont.match);
2629 FcPatternDestroy(dc.bfont.pattern);
2630 FcFontSetDestroy(dc.bfont.set);
2631 XftFontClose(xw.dpy, dc.ifont.match);
2632 FcPatternDestroy(dc.ifont.pattern);
2633 FcFontSetDestroy(dc.ifont.set);
2634 XftFontClose(xw.dpy, dc.ibfont.match);
2635 FcPatternDestroy(dc.ibfont.pattern);
2636 FcFontSetDestroy(dc.ibfont.set);
2637 }
2638
2639 void
2640 xzoom(const Arg *arg) {
2641 xunloadfonts();
2642 xloadfonts(usedfont, usedfontsize + arg->i);
2643 cresize(0, 0);
2644 redraw(0);
2645 }
2646
2647 void
2648 xinit(void) {
2649 XSetWindowAttributes attrs;
2650 XGCValues gcvalues;
2651 Cursor cursor;
2652 Window parent;
2653 int sw, sh;
2654
2655 if(!(xw.dpy = XOpenDisplay(NULL)))
2656 die("Can't open display\n");
2657 xw.scr = XDefaultScreen(xw.dpy);
2658 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2659
2660 /* font */
2661 if(!FcInit())
2662 die("Could not init fontconfig.\n");
2663
2664 usedfont = (opt_font == NULL)? font : opt_font;
2665 xloadfonts(usedfont, 0);
2666
2667 /* colors */
2668 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2669 xloadcols();
2670
2671 /* adjust fixed window geometry */
2672 if(xw.isfixed) {
2673 sw = DisplayWidth(xw.dpy, xw.scr);
2674 sh = DisplayHeight(xw.dpy, xw.scr);
2675 if(xw.fx < 0)
2676 xw.fx = sw + xw.fx - xw.fw - 1;
2677 if(xw.fy < 0)
2678 xw.fy = sh + xw.fy - xw.fh - 1;
2679
2680 xw.h = xw.fh;
2681 xw.w = xw.fw;
2682 } else {
2683 /* window - default size */
2684 xw.h = 2 * borderpx + term.row * xw.ch;
2685 xw.w = 2 * borderpx + term.col * xw.cw;
2686 xw.fx = 0;
2687 xw.fy = 0;
2688 }
2689
2690 /* Events */
2691 attrs.background_pixel = dc.col[defaultbg].pixel;
2692 attrs.border_pixel = dc.col[defaultbg].pixel;
2693 attrs.bit_gravity = NorthWestGravity;
2694 attrs.event_mask = FocusChangeMask | KeyPressMask
2695 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2696 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2697 attrs.colormap = xw.cmap;
2698
2699 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2700 XRootWindow(xw.dpy, xw.scr);
2701 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2702 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2703 xw.vis,
2704 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2705 | CWColormap,
2706 &attrs);
2707
2708 memset(&gcvalues, 0, sizeof(gcvalues));
2709 gcvalues.graphics_exposures = False;
2710 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2711 &gcvalues);
2712 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2713 DefaultDepth(xw.dpy, xw.scr));
2714 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2715 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2716
2717 /* Xft rendering context */
2718 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2719
2720 /* input methods */
2721 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2722 XSetLocaleModifiers("@im=local");
2723 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2724 XSetLocaleModifiers("@im=");
2725 if((xw.xim = XOpenIM(xw.dpy,
2726 NULL, NULL, NULL)) == NULL) {
2727 die("XOpenIM failed. Could not open input"
2728 " device.\n");
2729 }
2730 }
2731 }
2732 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2733 | XIMStatusNothing, XNClientWindow, xw.win,
2734 XNFocusWindow, xw.win, NULL);
2735 if(xw.xic == NULL)
2736 die("XCreateIC failed. Could not obtain input method.\n");
2737
2738 /* white cursor, black outline */
2739 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2740 XDefineCursor(xw.dpy, xw.win, cursor);
2741 XRecolorCursor(xw.dpy, cursor,
2742 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2743 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2744
2745 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2746 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2747 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2748
2749 xresettitle();
2750 XMapWindow(xw.dpy, xw.win);
2751 xhints();
2752 XSync(xw.dpy, 0);
2753 }
2754
2755 void
2756 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2757 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2758 width = charlen * xw.cw, xp, i;
2759 int frp, frcflags;
2760 int u8fl, u8fblen, u8cblen, doesexist;
2761 char *u8c, *u8fs;
2762 long u8char;
2763 Font *font = &dc.font;
2764 FcResult fcres;
2765 FcPattern *fcpattern, *fontpattern;
2766 FcFontSet *fcsets[] = { NULL };
2767 FcCharSet *fccharset;
2768 Colour *fg, *bg, *temp, revfg, revbg;
2769 XRenderColor colfg, colbg;
2770 Rectangle r;
2771
2772 frcflags = FRC_NORMAL;
2773
2774 if(base.mode & ATTR_ITALIC) {
2775 if(base.fg == defaultfg)
2776 base.fg = defaultitalic;
2777 font = &dc.ifont;
2778 frcflags = FRC_ITALIC;
2779 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2780 if(base.fg == defaultfg)
2781 base.fg = defaultitalic;
2782 font = &dc.ibfont;
2783 frcflags = FRC_ITALICBOLD;
2784 } else if(base.mode & ATTR_UNDERLINE) {
2785 if(base.fg == defaultfg)
2786 base.fg = defaultunderline;
2787 }
2788 fg = &dc.col[base.fg];
2789 bg = &dc.col[base.bg];
2790
2791 if(base.mode & ATTR_BOLD) {
2792 if(BETWEEN(base.fg, 0, 7)) {
2793 /* basic system colors */
2794 fg = &dc.col[base.fg + 8];
2795 } else if(BETWEEN(base.fg, 16, 195)) {
2796 /* 256 colors */
2797 fg = &dc.col[base.fg + 36];
2798 } else if(BETWEEN(base.fg, 232, 251)) {
2799 /* greyscale */
2800 fg = &dc.col[base.fg + 4];
2801 }
2802 /*
2803 * Those ranges will not be brightened:
2804 * 8 - 15 – bright system colors
2805 * 196 - 231 – highest 256 color cube
2806 * 252 - 255 – brightest colors in greyscale
2807 */
2808 font = &dc.bfont;
2809 frcflags = FRC_BOLD;
2810 }
2811
2812 if(IS_SET(MODE_REVERSE)) {
2813 if(fg == &dc.col[defaultfg]) {
2814 fg = &dc.col[defaultbg];
2815 } else {
2816 colfg.red = ~fg->color.red;
2817 colfg.green = ~fg->color.green;
2818 colfg.blue = ~fg->color.blue;
2819 colfg.alpha = fg->color.alpha;
2820 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2821 fg = &revfg;
2822 }
2823
2824 if(bg == &dc.col[defaultbg]) {
2825 bg = &dc.col[defaultfg];
2826 } else {
2827 colbg.red = ~bg->color.red;
2828 colbg.green = ~bg->color.green;
2829 colbg.blue = ~bg->color.blue;
2830 colbg.alpha = bg->color.alpha;
2831 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2832 bg = &revbg;
2833 }
2834 }
2835
2836 if(base.mode & ATTR_REVERSE) {
2837 temp = fg;
2838 fg = bg;
2839 bg = temp;
2840 }
2841
2842 /* Intelligent cleaning up of the borders. */
2843 if(x == 0) {
2844 xclear(0, (y == 0)? 0 : winy, borderpx,
2845 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2846 }
2847 if(x + charlen >= term.col) {
2848 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2849 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2850 }
2851 if(y == 0)
2852 xclear(winx, 0, winx + width, borderpx);
2853 if(y == term.row-1)
2854 xclear(winx, winy + xw.ch, winx + width, xw.h);
2855
2856 /* Clean up the region we want to draw to. */
2857 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2858
2859 /* Set the clip region because Xft is sometimes dirty. */
2860 r.x = 0;
2861 r.y = 0;
2862 r.height = xw.ch;
2863 r.width = width;
2864 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
2865
2866 fcsets[0] = font->set;
2867 for(xp = winx; bytelen > 0;) {
2868 /*
2869 * Search for the range in the to be printed string of glyphs
2870 * that are in the main font. Then print that range. If
2871 * some glyph is found that is not in the font, do the
2872 * fallback dance.
2873 */
2874 u8fs = s;
2875 u8fblen = 0;
2876 u8fl = 0;
2877 for(;;) {
2878 u8c = s;
2879 u8cblen = utf8decode(s, &u8char);
2880 s += u8cblen;
2881 bytelen -= u8cblen;
2882
2883 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
2884 if(!doesexist || bytelen <= 0) {
2885 if(bytelen <= 0) {
2886 if(doesexist) {
2887 u8fl++;
2888 u8fblen += u8cblen;
2889 }
2890 }
2891
2892 if(u8fl > 0) {
2893 XftDrawStringUtf8(xw.draw, fg,
2894 font->match, xp,
2895 winy + font->ascent,
2896 (FcChar8 *)u8fs,
2897 u8fblen);
2898 xp += font->width * u8fl;
2899
2900 }
2901 break;
2902 }
2903
2904 u8fl++;
2905 u8fblen += u8cblen;
2906 }
2907 if(doesexist)
2908 break;
2909
2910 frp = frccur;
2911 /* Search the font cache. */
2912 for(i = 0; i < frclen; i++, frp--) {
2913 if(frp <= 0)
2914 frp = LEN(frc) - 1;
2915
2916 if(frc[frp].c == u8char
2917 && frc[frp].flags == frcflags) {
2918 break;
2919 }
2920 }
2921
2922 /* Nothing was found. */
2923 if(i >= frclen) {
2924 /*
2925 * Nothing was found in the cache. Now use
2926 * some dozen of Fontconfig calls to get the
2927 * font for one single character.
2928 */
2929 fcpattern = FcPatternDuplicate(font->pattern);
2930 fccharset = FcCharSetCreate();
2931
2932 FcCharSetAddChar(fccharset, u8char);
2933 FcPatternAddCharSet(fcpattern, FC_CHARSET,
2934 fccharset);
2935 FcPatternAddBool(fcpattern, FC_SCALABLE,
2936 FcTrue);
2937
2938 FcConfigSubstitute(0, fcpattern,
2939 FcMatchPattern);
2940 FcDefaultSubstitute(fcpattern);
2941
2942 fontpattern = FcFontSetMatch(0, fcsets,
2943 FcTrue, fcpattern, &fcres);
2944
2945 /*
2946 * Overwrite or create the new cache entry.
2947 */
2948 frccur++;
2949 frclen++;
2950 if(frccur >= LEN(frc))
2951 frccur = 0;
2952 if(frclen > LEN(frc)) {
2953 frclen = LEN(frc);
2954 XftFontClose(xw.dpy, frc[frccur].font);
2955 }
2956
2957 frc[frccur].font = XftFontOpenPattern(xw.dpy,
2958 fontpattern);
2959 frc[frccur].c = u8char;
2960 frc[frccur].flags = frcflags;
2961
2962 FcPatternDestroy(fcpattern);
2963 FcCharSetDestroy(fccharset);
2964
2965 frp = frccur;
2966 }
2967
2968 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
2969 xp, winy + frc[frp].font->ascent,
2970 (FcChar8 *)u8c, u8cblen);
2971
2972 xp += font->width;
2973 }
2974
2975 /*
2976 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
2977 winy + font->ascent, (FcChar8 *)s, bytelen);
2978 */
2979
2980 if(base.mode & ATTR_UNDERLINE) {
2981 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
2982 width, 1);
2983 }
2984
2985 /* Reset clip to none. */
2986 XftDrawSetClip(xw.draw, 0);
2987 }
2988
2989 void
2990 xdrawcursor(void) {
2991 static int oldx = 0, oldy = 0;
2992 int sl;
2993 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
2994
2995 LIMIT(oldx, 0, term.col-1);
2996 LIMIT(oldy, 0, term.row-1);
2997
2998 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2999
3000 /* remove the old cursor */
3001 sl = utf8size(term.line[oldy][oldx].c);
3002 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3003 oldy, 1, sl);
3004
3005 /* draw the new one */
3006 if(!(IS_SET(MODE_HIDE))) {
3007 if(xw.state & WIN_FOCUSED) {
3008 if(IS_SET(MODE_REVERSE)) {
3009 g.mode |= ATTR_REVERSE;
3010 g.fg = defaultcs;
3011 g.bg = defaultfg;
3012 }
3013
3014 sl = utf8size(g.c);
3015 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
3016 } else {
3017 XftDrawRect(xw.draw, &dc.col[defaultcs],
3018 borderpx + term.c.x * xw.cw,
3019 borderpx + term.c.y * xw.ch,
3020 xw.cw - 1, 1);
3021 XftDrawRect(xw.draw, &dc.col[defaultcs],
3022 borderpx + term.c.x * xw.cw,
3023 borderpx + term.c.y * xw.ch,
3024 1, xw.ch - 1);
3025 XftDrawRect(xw.draw, &dc.col[defaultcs],
3026 borderpx + (term.c.x + 1) * xw.cw - 1,
3027 borderpx + term.c.y * xw.ch,
3028 1, xw.ch - 1);
3029 XftDrawRect(xw.draw, &dc.col[defaultcs],
3030 borderpx + term.c.x * xw.cw,
3031 borderpx + (term.c.y + 1) * xw.ch - 1,
3032 xw.cw, 1);
3033 }
3034 oldx = term.c.x, oldy = term.c.y;
3035 }
3036 }
3037
3038
3039 void
3040 xsettitle(char *p) {
3041 XTextProperty prop;
3042
3043 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3044 &prop);
3045 XSetWMName(xw.dpy, xw.win, &prop);
3046 }
3047
3048 void
3049 xresettitle(void) {
3050 xsettitle(opt_title ? opt_title : "st");
3051 }
3052
3053 void
3054 redraw(int timeout) {
3055 struct timespec tv = {0, timeout * 1000};
3056
3057 tfulldirt();
3058 draw();
3059
3060 if(timeout > 0) {
3061 nanosleep(&tv, NULL);
3062 XSync(xw.dpy, False); /* necessary for a good tput flash */
3063 }
3064 }
3065
3066 void
3067 draw(void) {
3068 drawregion(0, 0, term.col, term.row);
3069 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3070 xw.h, 0, 0);
3071 XSetForeground(xw.dpy, dc.gc,
3072 dc.col[IS_SET(MODE_REVERSE)?
3073 defaultfg : defaultbg].pixel);
3074 }
3075
3076 void
3077 drawregion(int x1, int y1, int x2, int y2) {
3078 int ic, ib, x, y, ox, sl;
3079 Glyph base, new;
3080 char buf[DRAW_BUF_SIZ];
3081 bool ena_sel = sel.bx != -1;
3082
3083 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3084 ena_sel = 0;
3085
3086 if(!(xw.state & WIN_VISIBLE))
3087 return;
3088
3089 for(y = y1; y < y2; y++) {
3090 if(!term.dirty[y])
3091 continue;
3092
3093 xtermclear(0, y, term.col, y);
3094 term.dirty[y] = 0;
3095 base = term.line[y][0];
3096 ic = ib = ox = 0;
3097 for(x = x1; x < x2; x++) {
3098 new = term.line[y][x];
3099 if(ena_sel && selected(x, y))
3100 new.mode ^= ATTR_REVERSE;
3101 if(ib > 0 && (ATTRCMP(base, new)
3102 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3103 xdraws(buf, base, ox, y, ic, ib);
3104 ic = ib = 0;
3105 }
3106 if(ib == 0) {
3107 ox = x;
3108 base = new;
3109 }
3110
3111 sl = utf8size(new.c);
3112 memcpy(buf+ib, new.c, sl);
3113 ib += sl;
3114 ++ic;
3115 }
3116 if(ib > 0)
3117 xdraws(buf, base, ox, y, ic, ib);
3118 }
3119 xdrawcursor();
3120 }
3121
3122 void
3123 expose(XEvent *ev) {
3124 XExposeEvent *e = &ev->xexpose;
3125
3126 if(xw.state & WIN_REDRAW) {
3127 if(!e->count)
3128 xw.state &= ~WIN_REDRAW;
3129 }
3130 redraw(0);
3131 }
3132
3133 void
3134 visibility(XEvent *ev) {
3135 XVisibilityEvent *e = &ev->xvisibility;
3136
3137 if(e->state == VisibilityFullyObscured) {
3138 xw.state &= ~WIN_VISIBLE;
3139 } else if(!(xw.state & WIN_VISIBLE)) {
3140 /* need a full redraw for next Expose, not just a buf copy */
3141 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3142 }
3143 }
3144
3145 void
3146 unmap(XEvent *ev) {
3147 xw.state &= ~WIN_VISIBLE;
3148 }
3149
3150 void
3151 xseturgency(int add) {
3152 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3153
3154 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3155 XSetWMHints(xw.dpy, xw.win, h);
3156 XFree(h);
3157 }
3158
3159 void
3160 focus(XEvent *ev) {
3161 XFocusChangeEvent *e = &ev->xfocus;
3162
3163 if(e->mode == NotifyGrab)
3164 return;
3165
3166 if(ev->type == FocusIn) {
3167 XSetICFocus(xw.xic);
3168 xw.state |= WIN_FOCUSED;
3169 xseturgency(0);
3170 } else {
3171 XUnsetICFocus(xw.xic);
3172 xw.state &= ~WIN_FOCUSED;
3173 }
3174 }
3175
3176 inline bool
3177 match(uint mask, uint state) {
3178 state &= ~(ignoremod);
3179
3180 if(mask == XK_NO_MOD && state)
3181 return false;
3182 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3183 return false;
3184 if((state & mask) != state)
3185 return false;
3186 return true;
3187 }
3188
3189 void
3190 numlock(const Arg *dummy) {
3191 term.numlock ^= 1;
3192 }
3193
3194 char*
3195 kmap(KeySym k, uint state) {
3196 uint mask;
3197 Key *kp;
3198 int i;
3199
3200 /* Check for mapped keys out of X11 function keys. */
3201 for(i = 0; i < LEN(mappedkeys); i++) {
3202 if(mappedkeys[i] == k)
3203 break;
3204 }
3205 if(i == LEN(mappedkeys)) {
3206 if((k & 0xFFFF) < 0xFD00)
3207 return NULL;
3208 }
3209
3210 for(kp = key; kp < key + LEN(key); kp++) {
3211 mask = kp->mask;
3212
3213 if(kp->k != k)
3214 continue;
3215
3216 if(!match(mask, state))
3217 continue;
3218
3219 if(kp->appkey > 0) {
3220 if(!IS_SET(MODE_APPKEYPAD))
3221 continue;
3222 if(term.numlock && kp->appkey == 2)
3223 continue;
3224 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3225 continue;
3226 }
3227
3228 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3229 (kp->appcursor > 0
3230 && !IS_SET(MODE_APPCURSOR))) {
3231 continue;
3232 }
3233
3234 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3235 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3236 continue;
3237 }
3238
3239 return kp->s;
3240 }
3241
3242 return NULL;
3243 }
3244
3245 void
3246 kpress(XEvent *ev) {
3247 XKeyEvent *e = &ev->xkey;
3248 KeySym ksym;
3249 char xstr[31], buf[32], *customkey, *cp = buf;
3250 int len, ret;
3251 long c;
3252 Status status;
3253 Shortcut *bp;
3254
3255 if(IS_SET(MODE_KBDLOCK))
3256 return;
3257
3258 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3259 e->state &= ~Mod2Mask;
3260 /* 1. shortcuts */
3261 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3262 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3263 bp->func(&(bp->arg));
3264 return;
3265 }
3266 }
3267
3268 /* 2. custom keys from config.h */
3269 if((customkey = kmap(ksym, e->state))) {
3270 len = strlen(customkey);
3271 memcpy(buf, customkey, len);
3272 /* 3. hardcoded (overrides X lookup) */
3273 } else {
3274 if(len == 0)
3275 return;
3276
3277 if(len == 1 && e->state & Mod1Mask) {
3278 if(IS_SET(MODE_8BIT)) {
3279 if(*xstr < 0177) {
3280 c = *xstr | B7;
3281 ret = utf8encode(&c, cp);
3282 cp += ret;
3283 len = 0;
3284 }
3285 } else {
3286 *cp++ = '\033';
3287 }
3288 }
3289
3290 memcpy(cp, xstr, len);
3291 len = cp - buf + len;
3292 }
3293
3294 ttywrite(buf, len);
3295 if(IS_SET(MODE_ECHO))
3296 techo(buf, len);
3297 }
3298
3299
3300 void
3301 cmessage(XEvent *e) {
3302 /*
3303 * See xembed specs
3304 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3305 */
3306 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3307 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3308 xw.state |= WIN_FOCUSED;
3309 xseturgency(0);
3310 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3311 xw.state &= ~WIN_FOCUSED;
3312 }
3313 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3314 /* Send SIGHUP to shell */
3315 kill(pid, SIGHUP);
3316 exit(EXIT_SUCCESS);
3317 }
3318 }
3319
3320 void
3321 cresize(int width, int height) {
3322 int col, row;
3323
3324 if(width != 0)
3325 xw.w = width;
3326 if(height != 0)
3327 xw.h = height;
3328
3329 col = (xw.w - 2 * borderpx) / xw.cw;
3330 row = (xw.h - 2 * borderpx) / xw.ch;
3331
3332 tresize(col, row);
3333 xresize(col, row);
3334 ttyresize();
3335 }
3336
3337 void
3338 resize(XEvent *e) {
3339 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3340 return;
3341
3342 cresize(e->xconfigure.width, e->xconfigure.height);
3343 }
3344
3345 void
3346 run(void) {
3347 XEvent ev;
3348 fd_set rfd;
3349 int xfd = XConnectionNumber(xw.dpy), xev;
3350 struct timeval drawtimeout, *tv = NULL, now, last;
3351
3352 gettimeofday(&last, NULL);
3353
3354 for(xev = actionfps;;) {
3355 FD_ZERO(&rfd);
3356 FD_SET(cmdfd, &rfd);
3357 FD_SET(xfd, &rfd);
3358 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3359 if(errno == EINTR)
3360 continue;
3361 die("select failed: %s\n", SERRNO);
3362 }
3363
3364 gettimeofday(&now, NULL);
3365 drawtimeout.tv_sec = 0;
3366 drawtimeout.tv_usec = (1000/xfps) * 1000;
3367 tv = &drawtimeout;
3368
3369 if(FD_ISSET(cmdfd, &rfd))
3370 ttyread();
3371
3372 if(FD_ISSET(xfd, &rfd))
3373 xev = actionfps;
3374
3375 if(TIMEDIFF(now, last) > \
3376 (xev ? (1000/xfps) : (1000/actionfps))) {
3377 while(XPending(xw.dpy)) {
3378 XNextEvent(xw.dpy, &ev);
3379 if(XFilterEvent(&ev, None))
3380 continue;
3381 if(handler[ev.type])
3382 (handler[ev.type])(&ev);
3383 }
3384
3385 draw();
3386 XFlush(xw.dpy);
3387 last = now;
3388
3389 if(xev && !FD_ISSET(xfd, &rfd))
3390 xev--;
3391 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd))
3392 tv = NULL;
3393 }
3394 }
3395 }
3396
3397 void
3398 usage(void) {
3399 die("%s " VERSION " (c) 2010-2013 st engineers\n" \
3400 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3401 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3402 }
3403
3404 int
3405 main(int argc, char *argv[]) {
3406 int bitm, xr, yr;
3407 uint wr, hr;
3408
3409 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3410 xw.isfixed = False;
3411
3412 ARGBEGIN {
3413 case 'a':
3414 allowaltscreen = false;
3415 break;
3416 case 'c':
3417 opt_class = EARGF(usage());
3418 break;
3419 case 'e':
3420 /* eat all remaining arguments */
3421 if(argc > 1)
3422 opt_cmd = &argv[1];
3423 goto run;
3424 case 'f':
3425 opt_font = EARGF(usage());
3426 break;
3427 case 'g':
3428 bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
3429 if(bitm & XValue)
3430 xw.fx = xr;
3431 if(bitm & YValue)
3432 xw.fy = yr;
3433 if(bitm & WidthValue)
3434 xw.fw = (int)wr;
3435 if(bitm & HeightValue)
3436 xw.fh = (int)hr;
3437 if(bitm & XNegative && xw.fx == 0)
3438 xw.fx = -1;
3439 if(bitm & XNegative && xw.fy == 0)
3440 xw.fy = -1;
3441
3442 if(xw.fh != 0 && xw.fw != 0)
3443 xw.isfixed = True;
3444 break;
3445 case 'o':
3446 opt_io = EARGF(usage());
3447 break;
3448 case 't':
3449 opt_title = EARGF(usage());
3450 break;
3451 case 'w':
3452 opt_embed = EARGF(usage());
3453 break;
3454 case 'v':
3455 default:
3456 usage();
3457 } ARGEND;
3458
3459 run:
3460 setlocale(LC_CTYPE, "");
3461 XSetLocaleModifiers("");
3462 tnew(80, 24);
3463 xinit();
3464 ttynew();
3465 selinit();
3466 if(xw.isfixed)
3467 cresize(xw.h, xw.w);
3468 run();
3469
3470 return 0;
3471 }
3472