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c938ff43a65363dd957c354801c89194a24d4648
[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 /* \n at the end of every selected line except for the last one */
792 if(is_selected && y < sel.e.y)
793 *ptr++ = '\r';
794 }
795 *ptr = 0;
796 }
797 xsetsel(str);
798 }
799
800 void
801 selnotify(XEvent *e) {
802 ulong nitems, ofs, rem;
803 int format;
804 uchar *data;
805 Atom type;
806
807 ofs = 0;
808 do {
809 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
810 False, AnyPropertyType, &type, &format,
811 &nitems, &rem, &data)) {
812 fprintf(stderr, "Clipboard allocation failed\n");
813 return;
814 }
815 ttywrite((const char *) data, nitems * format / 8);
816 XFree(data);
817 /* number of 32-bit chunks returned */
818 ofs += nitems * format / 32;
819 } while(rem > 0);
820 }
821
822 void
823 selpaste(const Arg *dummy) {
824 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
825 xw.win, CurrentTime);
826 }
827
828 void
829 clippaste(const Arg *dummy) {
830 Atom clipboard;
831
832 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
833 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
834 xw.win, CurrentTime);
835 }
836
837 void
838 selclear(XEvent *e) {
839 if(sel.bx == -1)
840 return;
841 sel.bx = -1;
842 tsetdirt(sel.b.y, sel.e.y);
843 }
844
845 void
846 selrequest(XEvent *e) {
847 XSelectionRequestEvent *xsre;
848 XSelectionEvent xev;
849 Atom xa_targets, string;
850
851 xsre = (XSelectionRequestEvent *) e;
852 xev.type = SelectionNotify;
853 xev.requestor = xsre->requestor;
854 xev.selection = xsre->selection;
855 xev.target = xsre->target;
856 xev.time = xsre->time;
857 /* reject */
858 xev.property = None;
859
860 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
861 if(xsre->target == xa_targets) {
862 /* respond with the supported type */
863 string = sel.xtarget;
864 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
865 XA_ATOM, 32, PropModeReplace,
866 (uchar *) &string, 1);
867 xev.property = xsre->property;
868 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
869 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
870 xsre->target, 8, PropModeReplace,
871 (uchar *) sel.clip, strlen(sel.clip));
872 xev.property = xsre->property;
873 }
874
875 /* all done, send a notification to the listener */
876 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
877 fprintf(stderr, "Error sending SelectionNotify event\n");
878 }
879
880 void
881 xsetsel(char *str) {
882 /* register the selection for both the clipboard and the primary */
883 Atom clipboard;
884
885 free(sel.clip);
886 sel.clip = str;
887
888 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
889
890 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
891 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
892 }
893
894 void
895 brelease(XEvent *e) {
896 struct timeval now;
897
898 if(IS_SET(MODE_MOUSE)) {
899 mousereport(e);
900 return;
901 }
902
903 if(e->xbutton.button == Button2) {
904 selpaste(NULL);
905 } else if(e->xbutton.button == Button1) {
906 sel.mode = 0;
907 getbuttoninfo(e);
908 term.dirty[sel.ey] = 1;
909 if(sel.bx == sel.ex && sel.by == sel.ey) {
910 sel.bx = -1;
911 gettimeofday(&now, NULL);
912
913 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
914 /* triple click on the line */
915 sel.b.x = sel.bx = 0;
916 sel.e.x = sel.ex = term.col;
917 sel.b.y = sel.e.y = sel.ey;
918 selcopy();
919 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
920 /* double click to select word */
921 sel.bx = sel.ex;
922 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
923 term.line[sel.ey][sel.bx-1].c[0] != ' ') {
924 sel.bx--;
925 }
926 sel.b.x = sel.bx;
927 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
928 term.line[sel.ey][sel.ex+1].c[0] != ' ') {
929 sel.ex++;
930 }
931 sel.e.x = sel.ex;
932 sel.b.y = sel.e.y = sel.ey;
933 selcopy();
934 }
935 } else {
936 selcopy();
937 }
938 }
939
940 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
941 gettimeofday(&sel.tclick1, NULL);
942 }
943
944 void
945 bmotion(XEvent *e) {
946 int oldey, oldex, oldsby, oldsey;
947
948 if(IS_SET(MODE_MOUSE)) {
949 mousereport(e);
950 return;
951 }
952
953 if(!sel.mode)
954 return;
955
956 oldey = sel.ey;
957 oldex = sel.ex;
958 oldsby = sel.b.y;
959 oldsey = sel.e.y;
960 getbuttoninfo(e);
961
962 if(oldey != sel.ey || oldex != sel.ex) {
963 tsetdirt(MIN(sel.b.y, oldsby), MAX(sel.e.y, oldsey));
964 }
965 }
966
967 void
968 die(const char *errstr, ...) {
969 va_list ap;
970
971 va_start(ap, errstr);
972 vfprintf(stderr, errstr, ap);
973 va_end(ap);
974 exit(EXIT_FAILURE);
975 }
976
977 void
978 execsh(void) {
979 char **args;
980 char *envshell = getenv("SHELL");
981 const struct passwd *pass = getpwuid(getuid());
982 char buf[sizeof(long) * 8 + 1];
983
984 unsetenv("COLUMNS");
985 unsetenv("LINES");
986 unsetenv("TERMCAP");
987
988 if(pass) {
989 setenv("LOGNAME", pass->pw_name, 1);
990 setenv("USER", pass->pw_name, 1);
991 setenv("SHELL", pass->pw_shell, 0);
992 setenv("HOME", pass->pw_dir, 0);
993 }
994
995 snprintf(buf, sizeof(buf), "%lu", xw.win);
996 setenv("WINDOWID", buf, 1);
997
998 signal(SIGCHLD, SIG_DFL);
999 signal(SIGHUP, SIG_DFL);
1000 signal(SIGINT, SIG_DFL);
1001 signal(SIGQUIT, SIG_DFL);
1002 signal(SIGTERM, SIG_DFL);
1003 signal(SIGALRM, SIG_DFL);
1004
1005 DEFAULT(envshell, shell);
1006 setenv("TERM", termname, 1);
1007 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1008 execvp(args[0], args);
1009 exit(EXIT_FAILURE);
1010 }
1011
1012 void
1013 sigchld(int a) {
1014 int stat = 0;
1015
1016 if(waitpid(pid, &stat, 0) < 0)
1017 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1018
1019 if(WIFEXITED(stat)) {
1020 exit(WEXITSTATUS(stat));
1021 } else {
1022 exit(EXIT_FAILURE);
1023 }
1024 }
1025
1026 void
1027 ttynew(void) {
1028 int m, s;
1029 struct winsize w = {term.row, term.col, 0, 0};
1030
1031 /* seems to work fine on linux, openbsd and freebsd */
1032 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1033 die("openpty failed: %s\n", SERRNO);
1034
1035 switch(pid = fork()) {
1036 case -1:
1037 die("fork failed\n");
1038 break;
1039 case 0:
1040 setsid(); /* create a new process group */
1041 dup2(s, STDIN_FILENO);
1042 dup2(s, STDOUT_FILENO);
1043 dup2(s, STDERR_FILENO);
1044 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1045 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1046 close(s);
1047 close(m);
1048 execsh();
1049 break;
1050 default:
1051 close(s);
1052 cmdfd = m;
1053 signal(SIGCHLD, sigchld);
1054 if(opt_io) {
1055 iofd = (!strcmp(opt_io, "-")) ?
1056 STDOUT_FILENO :
1057 open(opt_io, O_WRONLY | O_CREAT, 0666);
1058 if(iofd < 0) {
1059 fprintf(stderr, "Error opening %s:%s\n",
1060 opt_io, strerror(errno));
1061 }
1062 }
1063 }
1064 }
1065
1066 void
1067 dump(char c) {
1068 static int col;
1069
1070 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1071 if(++col % 10 == 0)
1072 fprintf(stderr, "\n");
1073 }
1074
1075 void
1076 ttyread(void) {
1077 static char buf[BUFSIZ];
1078 static int buflen = 0;
1079 char *ptr;
1080 char s[UTF_SIZ];
1081 int charsize; /* size of utf8 char in bytes */
1082 long utf8c;
1083 int ret;
1084
1085 /* append read bytes to unprocessed bytes */
1086 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1087 die("Couldn't read from shell: %s\n", SERRNO);
1088
1089 /* process every complete utf8 char */
1090 buflen += ret;
1091 ptr = buf;
1092 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1093 charsize = utf8decode(ptr, &utf8c);
1094 utf8encode(&utf8c, s);
1095 tputc(s, charsize);
1096 ptr += charsize;
1097 buflen -= charsize;
1098 }
1099
1100 /* keep any uncomplete utf8 char for the next call */
1101 memmove(buf, ptr, buflen);
1102 }
1103
1104 void
1105 ttywrite(const char *s, size_t n) {
1106 if(write(cmdfd, s, n) == -1)
1107 die("write error on tty: %s\n", SERRNO);
1108 }
1109
1110 void
1111 ttyresize(void) {
1112 struct winsize w;
1113
1114 w.ws_row = term.row;
1115 w.ws_col = term.col;
1116 w.ws_xpixel = xw.tw;
1117 w.ws_ypixel = xw.th;
1118 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1119 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1120 }
1121
1122 void
1123 tsetdirt(int top, int bot) {
1124 int i;
1125
1126 LIMIT(top, 0, term.row-1);
1127 LIMIT(bot, 0, term.row-1);
1128
1129 for(i = top; i <= bot; i++)
1130 term.dirty[i] = 1;
1131 }
1132
1133 void
1134 tfulldirt(void) {
1135 tsetdirt(0, term.row-1);
1136 }
1137
1138 void
1139 tcursor(int mode) {
1140 static TCursor c;
1141
1142 if(mode == CURSOR_SAVE) {
1143 c = term.c;
1144 } else if(mode == CURSOR_LOAD) {
1145 term.c = c;
1146 tmoveto(c.x, c.y);
1147 }
1148 }
1149
1150 void
1151 treset(void) {
1152 uint i;
1153
1154 term.c = (TCursor){{
1155 .mode = ATTR_NULL,
1156 .fg = defaultfg,
1157 .bg = defaultbg
1158 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1159
1160 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1161 for(i = tabspaces; i < term.col; i += tabspaces)
1162 term.tabs[i] = 1;
1163 term.top = 0;
1164 term.bot = term.row - 1;
1165 term.mode = MODE_WRAP;
1166
1167 tclearregion(0, 0, term.col-1, term.row-1, 0);
1168 tmoveto(0, 0);
1169 tcursor(CURSOR_SAVE);
1170 }
1171
1172 void
1173 tnew(int col, int row) {
1174 /* set screen size */
1175 term.row = row;
1176 term.col = col;
1177 term.line = xmalloc(term.row * sizeof(Line));
1178 term.alt = xmalloc(term.row * sizeof(Line));
1179 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
1180 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
1181
1182 for(row = 0; row < term.row; row++) {
1183 term.line[row] = xmalloc(term.col * sizeof(Glyph));
1184 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
1185 term.dirty[row] = 0;
1186 }
1187
1188 term.numlock = 1;
1189 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1190 /* setup screen */
1191 treset();
1192 }
1193
1194 void
1195 tswapscreen(void) {
1196 Line *tmp = term.line;
1197
1198 term.line = term.alt;
1199 term.alt = tmp;
1200 term.mode ^= MODE_ALTSCREEN;
1201 tfulldirt();
1202 }
1203
1204 void
1205 tscrolldown(int orig, int n) {
1206 int i;
1207 Line temp;
1208
1209 LIMIT(n, 0, term.bot-orig+1);
1210
1211 tclearregion(0, term.bot-n+1, term.col-1, term.bot, 0);
1212
1213 for(i = term.bot; i >= orig+n; i--) {
1214 temp = term.line[i];
1215 term.line[i] = term.line[i-n];
1216 term.line[i-n] = temp;
1217
1218 term.dirty[i] = 1;
1219 term.dirty[i-n] = 1;
1220 }
1221
1222 selscroll(orig, n);
1223 }
1224
1225 void
1226 tscrollup(int orig, int n) {
1227 int i;
1228 Line temp;
1229 LIMIT(n, 0, term.bot-orig+1);
1230
1231 tclearregion(0, orig, term.col-1, orig+n-1, 0);
1232
1233 for(i = orig; i <= term.bot-n; i++) {
1234 temp = term.line[i];
1235 term.line[i] = term.line[i+n];
1236 term.line[i+n] = temp;
1237
1238 term.dirty[i] = 1;
1239 term.dirty[i+n] = 1;
1240 }
1241
1242 selscroll(orig, -n);
1243 }
1244
1245 void
1246 selscroll(int orig, int n) {
1247 if(sel.bx == -1)
1248 return;
1249
1250 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1251 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1252 sel.bx = -1;
1253 return;
1254 }
1255 if(sel.type == SEL_RECTANGULAR) {
1256 if(sel.by < term.top)
1257 sel.by = term.top;
1258 if(sel.ey > term.bot)
1259 sel.ey = term.bot;
1260 } else {
1261 if(sel.by < term.top) {
1262 sel.by = term.top;
1263 sel.bx = 0;
1264 }
1265 if(sel.ey > term.bot) {
1266 sel.ey = term.bot;
1267 sel.ex = term.col;
1268 }
1269 }
1270 sel.b.y = sel.by, sel.b.x = sel.bx;
1271 sel.e.y = sel.ey, sel.e.x = sel.ex;
1272 }
1273 }
1274
1275 void
1276 tnewline(int first_col) {
1277 int y = term.c.y;
1278
1279 if(y == term.bot) {
1280 tscrollup(term.top, 1);
1281 } else {
1282 y++;
1283 }
1284 tmoveto(first_col ? 0 : term.c.x, y);
1285 }
1286
1287 void
1288 csiparse(void) {
1289 char *p = csiescseq.buf, *np;
1290 long int v;
1291
1292 csiescseq.narg = 0;
1293 if(*p == '?') {
1294 csiescseq.priv = 1;
1295 p++;
1296 }
1297
1298 csiescseq.buf[csiescseq.len] = '\0';
1299 while(p < csiescseq.buf+csiescseq.len) {
1300 np = NULL;
1301 v = strtol(p, &np, 10);
1302 if(np == p)
1303 v = 0;
1304 if(v == LONG_MAX || v == LONG_MIN)
1305 v = -1;
1306 csiescseq.arg[csiescseq.narg++] = v;
1307 p = np;
1308 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1309 break;
1310 p++;
1311 }
1312 csiescseq.mode = *p;
1313 }
1314
1315 /* for absolute user moves, when decom is set */
1316 void
1317 tmoveato(int x, int y) {
1318 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1319 }
1320
1321 void
1322 tmoveto(int x, int y) {
1323 int miny, maxy;
1324
1325 if(term.c.state & CURSOR_ORIGIN) {
1326 miny = term.top;
1327 maxy = term.bot;
1328 } else {
1329 miny = 0;
1330 maxy = term.row - 1;
1331 }
1332 LIMIT(x, 0, term.col-1);
1333 LIMIT(y, miny, maxy);
1334 term.c.state &= ~CURSOR_WRAPNEXT;
1335 term.c.x = x;
1336 term.c.y = y;
1337 }
1338
1339 void
1340 tsetchar(char *c, Glyph *attr, int x, int y) {
1341 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1342 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1343 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1344 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1345 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1346 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1347 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1348 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1349 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1350 };
1351
1352 /*
1353 * The table is proudly stolen from rxvt.
1354 */
1355 if(attr->mode & ATTR_GFX) {
1356 if(c[0] >= 0x41 && c[0] <= 0x7e
1357 && vt100_0[c[0] - 0x41]) {
1358 c = vt100_0[c[0] - 0x41];
1359 }
1360 }
1361
1362 term.dirty[y] = 1;
1363 term.line[y][x] = *attr;
1364 memcpy(term.line[y][x].c, c, UTF_SIZ);
1365 term.line[y][x].state |= GLYPH_SET;
1366 }
1367
1368 void
1369 tclearregion(int x1, int y1, int x2, int y2, int bce) {
1370 int x, y, temp;
1371
1372 if(x1 > x2)
1373 temp = x1, x1 = x2, x2 = temp;
1374 if(y1 > y2)
1375 temp = y1, y1 = y2, y2 = temp;
1376
1377 LIMIT(x1, 0, term.col-1);
1378 LIMIT(x2, 0, term.col-1);
1379 LIMIT(y1, 0, term.row-1);
1380 LIMIT(y2, 0, term.row-1);
1381
1382 for(y = y1; y <= y2; y++) {
1383 term.dirty[y] = 1;
1384 for(x = x1; x <= x2; x++) {
1385 if(bce) {
1386 term.line[y][x] = term.c.attr;
1387 memcpy(term.line[y][x].c, " ", 2);
1388 term.line[y][x].state |= GLYPH_SET;
1389 } else {
1390 term.line[y][x].state = 0;
1391 }
1392 }
1393 }
1394 }
1395
1396 void
1397 tdeletechar(int n) {
1398 int src = term.c.x + n;
1399 int dst = term.c.x;
1400 int size = term.col - src;
1401
1402 term.dirty[term.c.y] = 1;
1403
1404 if(src >= term.col) {
1405 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1406 return;
1407 }
1408
1409 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1410 size * sizeof(Glyph));
1411 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y, 0);
1412 }
1413
1414 void
1415 tinsertblank(int n) {
1416 int src = term.c.x;
1417 int dst = src + n;
1418 int size = term.col - dst;
1419
1420 term.dirty[term.c.y] = 1;
1421
1422 if(dst >= term.col) {
1423 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1424 return;
1425 }
1426
1427 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1428 size * sizeof(Glyph));
1429 tclearregion(src, term.c.y, dst - 1, term.c.y, 0);
1430 }
1431
1432 void
1433 tinsertblankline(int n) {
1434 if(term.c.y < term.top || term.c.y > term.bot)
1435 return;
1436
1437 tscrolldown(term.c.y, n);
1438 }
1439
1440 void
1441 tdeleteline(int n) {
1442 if(term.c.y < term.top || term.c.y > term.bot)
1443 return;
1444
1445 tscrollup(term.c.y, n);
1446 }
1447
1448 void
1449 tsetattr(int *attr, int l) {
1450 int i;
1451
1452 for(i = 0; i < l; i++) {
1453 switch(attr[i]) {
1454 case 0:
1455 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1456 | ATTR_ITALIC | ATTR_BLINK);
1457 term.c.attr.fg = defaultfg;
1458 term.c.attr.bg = defaultbg;
1459 break;
1460 case 1:
1461 term.c.attr.mode |= ATTR_BOLD;
1462 break;
1463 case 3:
1464 term.c.attr.mode |= ATTR_ITALIC;
1465 break;
1466 case 4:
1467 term.c.attr.mode |= ATTR_UNDERLINE;
1468 break;
1469 case 5: /* slow blink */
1470 case 6: /* rapid blink */
1471 term.c.attr.mode |= ATTR_BLINK;
1472 break;
1473 case 7:
1474 term.c.attr.mode |= ATTR_REVERSE;
1475 break;
1476 case 21:
1477 case 22:
1478 term.c.attr.mode &= ~ATTR_BOLD;
1479 break;
1480 case 23:
1481 term.c.attr.mode &= ~ATTR_ITALIC;
1482 break;
1483 case 24:
1484 term.c.attr.mode &= ~ATTR_UNDERLINE;
1485 break;
1486 case 25:
1487 case 26:
1488 term.c.attr.mode &= ~ATTR_BLINK;
1489 break;
1490 case 27:
1491 term.c.attr.mode &= ~ATTR_REVERSE;
1492 break;
1493 case 38:
1494 if(i + 2 < l && attr[i + 1] == 5) {
1495 i += 2;
1496 if(BETWEEN(attr[i], 0, 255)) {
1497 term.c.attr.fg = attr[i];
1498 } else {
1499 fprintf(stderr,
1500 "erresc: bad fgcolor %d\n",
1501 attr[i]);
1502 }
1503 } else {
1504 fprintf(stderr,
1505 "erresc(38): gfx attr %d unknown\n",
1506 attr[i]);
1507 }
1508 break;
1509 case 39:
1510 term.c.attr.fg = defaultfg;
1511 break;
1512 case 48:
1513 if(i + 2 < l && attr[i + 1] == 5) {
1514 i += 2;
1515 if(BETWEEN(attr[i], 0, 255)) {
1516 term.c.attr.bg = attr[i];
1517 } else {
1518 fprintf(stderr,
1519 "erresc: bad bgcolor %d\n",
1520 attr[i]);
1521 }
1522 } else {
1523 fprintf(stderr,
1524 "erresc(48): gfx attr %d unknown\n",
1525 attr[i]);
1526 }
1527 break;
1528 case 49:
1529 term.c.attr.bg = defaultbg;
1530 break;
1531 default:
1532 if(BETWEEN(attr[i], 30, 37)) {
1533 term.c.attr.fg = attr[i] - 30;
1534 } else if(BETWEEN(attr[i], 40, 47)) {
1535 term.c.attr.bg = attr[i] - 40;
1536 } else if(BETWEEN(attr[i], 90, 97)) {
1537 term.c.attr.fg = attr[i] - 90 + 8;
1538 } else if(BETWEEN(attr[i], 100, 107)) {
1539 term.c.attr.bg = attr[i] - 100 + 8;
1540 } else {
1541 fprintf(stderr,
1542 "erresc(default): gfx attr %d unknown\n",
1543 attr[i]), csidump();
1544 }
1545 break;
1546 }
1547 }
1548 }
1549
1550 void
1551 tsetscroll(int t, int b) {
1552 int temp;
1553
1554 LIMIT(t, 0, term.row-1);
1555 LIMIT(b, 0, term.row-1);
1556 if(t > b) {
1557 temp = t;
1558 t = b;
1559 b = temp;
1560 }
1561 term.top = t;
1562 term.bot = b;
1563 }
1564
1565 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1566
1567 void
1568 tsetmode(bool priv, bool set, int *args, int narg) {
1569 int *lim, mode;
1570 bool alt;
1571
1572 for(lim = args + narg; args < lim; ++args) {
1573 if(priv) {
1574 switch(*args) {
1575 break;
1576 case 1: /* DECCKM -- Cursor key */
1577 MODBIT(term.mode, set, MODE_APPCURSOR);
1578 break;
1579 case 5: /* DECSCNM -- Reverse video */
1580 mode = term.mode;
1581 MODBIT(term.mode, set, MODE_REVERSE);
1582 if(mode != term.mode)
1583 redraw(REDRAW_TIMEOUT);
1584 break;
1585 case 6: /* DECOM -- Origin */
1586 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1587 tmoveato(0, 0);
1588 break;
1589 case 7: /* DECAWM -- Auto wrap */
1590 MODBIT(term.mode, set, MODE_WRAP);
1591 break;
1592 case 0: /* Error (IGNORED) */
1593 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1594 case 3: /* DECCOLM -- Column (IGNORED) */
1595 case 4: /* DECSCLM -- Scroll (IGNORED) */
1596 case 8: /* DECARM -- Auto repeat (IGNORED) */
1597 case 18: /* DECPFF -- Printer feed (IGNORED) */
1598 case 19: /* DECPEX -- Printer extent (IGNORED) */
1599 case 42: /* DECNRCM -- National characters (IGNORED) */
1600 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1601 break;
1602 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1603 MODBIT(term.mode, !set, MODE_HIDE);
1604 break;
1605 case 1000: /* 1000,1002: enable xterm mouse report */
1606 MODBIT(term.mode, set, MODE_MOUSEBTN);
1607 MODBIT(term.mode, 0, MODE_MOUSEMOTION);
1608 break;
1609 case 1002:
1610 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1611 MODBIT(term.mode, 0, MODE_MOUSEBTN);
1612 break;
1613 case 1006:
1614 MODBIT(term.mode, set, MODE_MOUSESGR);
1615 break;
1616 case 1049: /* = 1047 and 1048 */
1617 case 47:
1618 case 1047:
1619 if (!allowaltscreen)
1620 break;
1621
1622 alt = IS_SET(MODE_ALTSCREEN);
1623 if(alt) {
1624 tclearregion(0, 0, term.col-1,
1625 term.row-1, 0);
1626 }
1627 if(set ^ alt) /* set is always 1 or 0 */
1628 tswapscreen();
1629 if(*args != 1049)
1630 break;
1631 /* FALLTRU */
1632 case 1048:
1633 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1634 break;
1635 default:
1636 fprintf(stderr,
1637 "erresc: unknown private set/reset mode %d\n",
1638 *args);
1639 break;
1640 }
1641 } else {
1642 switch(*args) {
1643 case 0: /* Error (IGNORED) */
1644 break;
1645 case 2: /* KAM -- keyboard action */
1646 MODBIT(term.mode, set, MODE_KBDLOCK);
1647 break;
1648 case 4: /* IRM -- Insertion-replacement */
1649 MODBIT(term.mode, set, MODE_INSERT);
1650 break;
1651 case 12: /* SRM -- Send/Receive */
1652 MODBIT(term.mode, !set, MODE_ECHO);
1653 break;
1654 case 20: /* LNM -- Linefeed/new line */
1655 MODBIT(term.mode, set, MODE_CRLF);
1656 break;
1657 default:
1658 fprintf(stderr,
1659 "erresc: unknown set/reset mode %d\n",
1660 *args);
1661 break;
1662 }
1663 }
1664 }
1665 }
1666 #undef MODBIT
1667
1668
1669 void
1670 csihandle(void) {
1671 switch(csiescseq.mode) {
1672 default:
1673 unknown:
1674 fprintf(stderr, "erresc: unknown csi ");
1675 csidump();
1676 /* die(""); */
1677 break;
1678 case '@': /* ICH -- Insert <n> blank char */
1679 DEFAULT(csiescseq.arg[0], 1);
1680 tinsertblank(csiescseq.arg[0]);
1681 break;
1682 case 'A': /* CUU -- Cursor <n> Up */
1683 DEFAULT(csiescseq.arg[0], 1);
1684 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1685 break;
1686 case 'B': /* CUD -- Cursor <n> Down */
1687 case 'e': /* VPR --Cursor <n> Down */
1688 DEFAULT(csiescseq.arg[0], 1);
1689 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1690 break;
1691 case 'c': /* DA -- Device Attributes */
1692 if(csiescseq.arg[0] == 0)
1693 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1694 break;
1695 case 'C': /* CUF -- Cursor <n> Forward */
1696 case 'a': /* HPR -- Cursor <n> Forward */
1697 DEFAULT(csiescseq.arg[0], 1);
1698 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1699 break;
1700 case 'D': /* CUB -- Cursor <n> Backward */
1701 DEFAULT(csiescseq.arg[0], 1);
1702 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1703 break;
1704 case 'E': /* CNL -- Cursor <n> Down and first col */
1705 DEFAULT(csiescseq.arg[0], 1);
1706 tmoveto(0, term.c.y+csiescseq.arg[0]);
1707 break;
1708 case 'F': /* CPL -- Cursor <n> Up and first col */
1709 DEFAULT(csiescseq.arg[0], 1);
1710 tmoveto(0, term.c.y-csiescseq.arg[0]);
1711 break;
1712 case 'g': /* TBC -- Tabulation clear */
1713 switch(csiescseq.arg[0]) {
1714 case 0: /* clear current tab stop */
1715 term.tabs[term.c.x] = 0;
1716 break;
1717 case 3: /* clear all the tabs */
1718 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1719 break;
1720 default:
1721 goto unknown;
1722 }
1723 break;
1724 case 'G': /* CHA -- Move to <col> */
1725 case '`': /* HPA */
1726 DEFAULT(csiescseq.arg[0], 1);
1727 tmoveto(csiescseq.arg[0]-1, term.c.y);
1728 break;
1729 case 'H': /* CUP -- Move to <row> <col> */
1730 case 'f': /* HVP */
1731 DEFAULT(csiescseq.arg[0], 1);
1732 DEFAULT(csiescseq.arg[1], 1);
1733 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1734 break;
1735 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1736 DEFAULT(csiescseq.arg[0], 1);
1737 while(csiescseq.arg[0]--)
1738 tputtab(1);
1739 break;
1740 case 'J': /* ED -- Clear screen */
1741 sel.bx = -1;
1742 switch(csiescseq.arg[0]) {
1743 case 0: /* below */
1744 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 1);
1745 if(term.c.y < term.row-1) {
1746 tclearregion(0, term.c.y+1, term.col-1,
1747 term.row-1, 1);
1748 }
1749 break;
1750 case 1: /* above */
1751 if(term.c.y > 1)
1752 tclearregion(0, 0, term.col-1, term.c.y-1, 1);
1753 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1754 break;
1755 case 2: /* all */
1756 tclearregion(0, 0, term.col-1, term.row-1, 1);
1757 break;
1758 default:
1759 goto unknown;
1760 }
1761 break;
1762 case 'K': /* EL -- Clear line */
1763 switch(csiescseq.arg[0]) {
1764 case 0: /* right */
1765 tclearregion(term.c.x, term.c.y, term.col-1,
1766 term.c.y, 1);
1767 break;
1768 case 1: /* left */
1769 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1770 break;
1771 case 2: /* all */
1772 tclearregion(0, term.c.y, term.col-1, term.c.y, 1);
1773 break;
1774 }
1775 break;
1776 case 'S': /* SU -- Scroll <n> line up */
1777 DEFAULT(csiescseq.arg[0], 1);
1778 tscrollup(term.top, csiescseq.arg[0]);
1779 break;
1780 case 'T': /* SD -- Scroll <n> line down */
1781 DEFAULT(csiescseq.arg[0], 1);
1782 tscrolldown(term.top, csiescseq.arg[0]);
1783 break;
1784 case 'L': /* IL -- Insert <n> blank lines */
1785 DEFAULT(csiescseq.arg[0], 1);
1786 tinsertblankline(csiescseq.arg[0]);
1787 break;
1788 case 'l': /* RM -- Reset Mode */
1789 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1790 break;
1791 case 'M': /* DL -- Delete <n> lines */
1792 DEFAULT(csiescseq.arg[0], 1);
1793 tdeleteline(csiescseq.arg[0]);
1794 break;
1795 case 'X': /* ECH -- Erase <n> char */
1796 DEFAULT(csiescseq.arg[0], 1);
1797 tclearregion(term.c.x, term.c.y,
1798 term.c.x + csiescseq.arg[0] - 1, term.c.y, 1);
1799 break;
1800 case 'P': /* DCH -- Delete <n> char */
1801 DEFAULT(csiescseq.arg[0], 1);
1802 tdeletechar(csiescseq.arg[0]);
1803 break;
1804 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1805 DEFAULT(csiescseq.arg[0], 1);
1806 while(csiescseq.arg[0]--)
1807 tputtab(0);
1808 break;
1809 case 'd': /* VPA -- Move to <row> */
1810 DEFAULT(csiescseq.arg[0], 1);
1811 tmoveato(term.c.x, csiescseq.arg[0]-1);
1812 break;
1813 case 'h': /* SM -- Set terminal mode */
1814 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1815 break;
1816 case 'm': /* SGR -- Terminal attribute (color) */
1817 tsetattr(csiescseq.arg, csiescseq.narg);
1818 break;
1819 case 'r': /* DECSTBM -- Set Scrolling Region */
1820 if(csiescseq.priv) {
1821 goto unknown;
1822 } else {
1823 DEFAULT(csiescseq.arg[0], 1);
1824 DEFAULT(csiescseq.arg[1], term.row);
1825 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1826 tmoveato(0, 0);
1827 }
1828 break;
1829 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1830 tcursor(CURSOR_SAVE);
1831 break;
1832 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1833 tcursor(CURSOR_LOAD);
1834 break;
1835 }
1836 }
1837
1838 void
1839 csidump(void) {
1840 int i;
1841 uint c;
1842
1843 printf("ESC[");
1844 for(i = 0; i < csiescseq.len; i++) {
1845 c = csiescseq.buf[i] & 0xff;
1846 if(isprint(c)) {
1847 putchar(c);
1848 } else if(c == '\n') {
1849 printf("(\\n)");
1850 } else if(c == '\r') {
1851 printf("(\\r)");
1852 } else if(c == 0x1b) {
1853 printf("(\\e)");
1854 } else {
1855 printf("(%02x)", c);
1856 }
1857 }
1858 putchar('\n');
1859 }
1860
1861 void
1862 csireset(void) {
1863 memset(&csiescseq, 0, sizeof(csiescseq));
1864 }
1865
1866 void
1867 strhandle(void) {
1868 char *p = NULL;
1869 int i, j, narg;
1870
1871 strparse();
1872 narg = strescseq.narg;
1873
1874 switch(strescseq.type) {
1875 case ']': /* OSC -- Operating System Command */
1876 switch(i = atoi(strescseq.args[0])) {
1877 case 0:
1878 case 1:
1879 case 2:
1880 if(narg > 1)
1881 xsettitle(strescseq.args[1]);
1882 break;
1883 case 4: /* color set */
1884 if(narg < 3)
1885 break;
1886 p = strescseq.args[2];
1887 /* fall through */
1888 case 104: /* color reset, here p = NULL */
1889 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
1890 if (!xsetcolorname(j, p)) {
1891 fprintf(stderr, "erresc: invalid color %s\n", p);
1892 } else {
1893 /*
1894 * TODO if defaultbg color is changed, borders
1895 * are dirty
1896 */
1897 redraw(0);
1898 }
1899 break;
1900 default:
1901 fprintf(stderr, "erresc: unknown str ");
1902 strdump();
1903 break;
1904 }
1905 break;
1906 case 'k': /* old title set compatibility */
1907 xsettitle(strescseq.args[0]);
1908 break;
1909 case 'P': /* DSC -- Device Control String */
1910 case '_': /* APC -- Application Program Command */
1911 case '^': /* PM -- Privacy Message */
1912 default:
1913 fprintf(stderr, "erresc: unknown str ");
1914 strdump();
1915 /* die(""); */
1916 break;
1917 }
1918 }
1919
1920 void
1921 strparse(void) {
1922 char *p = strescseq.buf;
1923
1924 strescseq.narg = 0;
1925 strescseq.buf[strescseq.len] = '\0';
1926 while(p && strescseq.narg < STR_ARG_SIZ)
1927 strescseq.args[strescseq.narg++] = strsep(&p, ";");
1928 }
1929
1930 void
1931 strdump(void) {
1932 int i;
1933 uint c;
1934
1935 printf("ESC%c", strescseq.type);
1936 for(i = 0; i < strescseq.len; i++) {
1937 c = strescseq.buf[i] & 0xff;
1938 if(c == '\0') {
1939 return;
1940 } else if(isprint(c)) {
1941 putchar(c);
1942 } else if(c == '\n') {
1943 printf("(\\n)");
1944 } else if(c == '\r') {
1945 printf("(\\r)");
1946 } else if(c == 0x1b) {
1947 printf("(\\e)");
1948 } else {
1949 printf("(%02x)", c);
1950 }
1951 }
1952 printf("ESC\\\n");
1953 }
1954
1955 void
1956 strreset(void) {
1957 memset(&strescseq, 0, sizeof(strescseq));
1958 }
1959
1960 void
1961 tputtab(bool forward) {
1962 uint x = term.c.x;
1963
1964 if(forward) {
1965 if(x == term.col)
1966 return;
1967 for(++x; x < term.col && !term.tabs[x]; ++x)
1968 /* nothing */ ;
1969 } else {
1970 if(x == 0)
1971 return;
1972 for(--x; x > 0 && !term.tabs[x]; --x)
1973 /* nothing */ ;
1974 }
1975 tmoveto(x, term.c.y);
1976 }
1977
1978 void
1979 techo(char *buf, int len) {
1980 for(; len > 0; buf++, len--) {
1981 char c = *buf;
1982
1983 if(c == '\033') { /* escape */
1984 tputc("^", 1);
1985 tputc("[", 1);
1986 } else if(c < '\x20') { /* control code */
1987 if(c != '\n' && c != '\r' && c != '\t') {
1988 c |= '\x40';
1989 tputc("^", 1);
1990 }
1991 tputc(&c, 1);
1992 } else {
1993 break;
1994 }
1995 }
1996 if(len)
1997 tputc(buf, len);
1998 }
1999
2000 void
2001 tputc(char *c, int len) {
2002 uchar ascii = *c;
2003 bool control = ascii < '\x20' || ascii == 0177;
2004
2005 if(iofd != -1) {
2006 if(xwrite(iofd, c, len) < 0) {
2007 fprintf(stderr, "Error writing in %s:%s\n",
2008 opt_io, strerror(errno));
2009 close(iofd);
2010 iofd = -1;
2011 }
2012 }
2013
2014 /*
2015 * STR sequences must be checked before anything else
2016 * because it can use some control codes as part of the sequence.
2017 */
2018 if(term.esc & ESC_STR) {
2019 switch(ascii) {
2020 case '\033':
2021 term.esc = ESC_START | ESC_STR_END;
2022 break;
2023 case '\a': /* backwards compatibility to xterm */
2024 term.esc = 0;
2025 strhandle();
2026 break;
2027 default:
2028 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2029 memmove(&strescseq.buf[strescseq.len], c, len);
2030 strescseq.len += len;
2031 } else {
2032 /*
2033 * Here is a bug in terminals. If the user never sends
2034 * some code to stop the str or esc command, then st
2035 * will stop responding. But this is better than
2036 * silently failing with unknown characters. At least
2037 * then users will report back.
2038 *
2039 * In the case users ever get fixed, here is the code:
2040 */
2041 /*
2042 * term.esc = 0;
2043 * strhandle();
2044 */
2045 }
2046 }
2047 return;
2048 }
2049
2050 /*
2051 * Actions of control codes must be performed as soon they arrive
2052 * because they can be embedded inside a control sequence, and
2053 * they must not cause conflicts with sequences.
2054 */
2055 if(control) {
2056 switch(ascii) {
2057 case '\t': /* HT */
2058 tputtab(1);
2059 return;
2060 case '\b': /* BS */
2061 tmoveto(term.c.x-1, term.c.y);
2062 return;
2063 case '\r': /* CR */
2064 tmoveto(0, term.c.y);
2065 return;
2066 case '\f': /* LF */
2067 case '\v': /* VT */
2068 case '\n': /* LF */
2069 /* go to first col if the mode is set */
2070 tnewline(IS_SET(MODE_CRLF));
2071 return;
2072 case '\a': /* BEL */
2073 if(!(xw.state & WIN_FOCUSED))
2074 xseturgency(1);
2075 return;
2076 case '\033': /* ESC */
2077 csireset();
2078 term.esc = ESC_START;
2079 return;
2080 case '\016': /* SO */
2081 case '\017': /* SI */
2082 /*
2083 * Different charsets are hard to handle. Applications
2084 * should use the right alt charset escapes for the
2085 * only reason they still exist: line drawing. The
2086 * rest is incompatible history st should not support.
2087 */
2088 return;
2089 case '\032': /* SUB */
2090 case '\030': /* CAN */
2091 csireset();
2092 return;
2093 case '\005': /* ENQ (IGNORED) */
2094 case '\000': /* NUL (IGNORED) */
2095 case '\021': /* XON (IGNORED) */
2096 case '\023': /* XOFF (IGNORED) */
2097 case 0177: /* DEL (IGNORED) */
2098 return;
2099 }
2100 } else if(term.esc & ESC_START) {
2101 if(term.esc & ESC_CSI) {
2102 csiescseq.buf[csiescseq.len++] = ascii;
2103 if(BETWEEN(ascii, 0x40, 0x7E)
2104 || csiescseq.len >= \
2105 sizeof(csiescseq.buf)-1) {
2106 term.esc = 0;
2107 csiparse();
2108 csihandle();
2109 }
2110 } else if(term.esc & ESC_STR_END) {
2111 term.esc = 0;
2112 if(ascii == '\\')
2113 strhandle();
2114 } else if(term.esc & ESC_ALTCHARSET) {
2115 switch(ascii) {
2116 case '0': /* Line drawing set */
2117 term.c.attr.mode |= ATTR_GFX;
2118 break;
2119 case 'B': /* USASCII */
2120 term.c.attr.mode &= ~ATTR_GFX;
2121 break;
2122 case 'A': /* UK (IGNORED) */
2123 case '<': /* multinational charset (IGNORED) */
2124 case '5': /* Finnish (IGNORED) */
2125 case 'C': /* Finnish (IGNORED) */
2126 case 'K': /* German (IGNORED) */
2127 break;
2128 default:
2129 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2130 }
2131 term.esc = 0;
2132 } else if(term.esc & ESC_TEST) {
2133 if(ascii == '8') { /* DEC screen alignment test. */
2134 char E[UTF_SIZ] = "E";
2135 int x, y;
2136
2137 for(x = 0; x < term.col; ++x) {
2138 for(y = 0; y < term.row; ++y)
2139 tsetchar(E, &term.c.attr, x, y);
2140 }
2141 }
2142 term.esc = 0;
2143 } else {
2144 switch(ascii) {
2145 case '[':
2146 term.esc |= ESC_CSI;
2147 break;
2148 case '#':
2149 term.esc |= ESC_TEST;
2150 break;
2151 case 'P': /* DCS -- Device Control String */
2152 case '_': /* APC -- Application Program Command */
2153 case '^': /* PM -- Privacy Message */
2154 case ']': /* OSC -- Operating System Command */
2155 case 'k': /* old title set compatibility */
2156 strreset();
2157 strescseq.type = ascii;
2158 term.esc |= ESC_STR;
2159 break;
2160 case '(': /* set primary charset G0 */
2161 term.esc |= ESC_ALTCHARSET;
2162 break;
2163 case ')': /* set secondary charset G1 (IGNORED) */
2164 case '*': /* set tertiary charset G2 (IGNORED) */
2165 case '+': /* set quaternary charset G3 (IGNORED) */
2166 term.esc = 0;
2167 break;
2168 case 'D': /* IND -- Linefeed */
2169 if(term.c.y == term.bot) {
2170 tscrollup(term.top, 1);
2171 } else {
2172 tmoveto(term.c.x, term.c.y+1);
2173 }
2174 term.esc = 0;
2175 break;
2176 case 'E': /* NEL -- Next line */
2177 tnewline(1); /* always go to first col */
2178 term.esc = 0;
2179 break;
2180 case 'H': /* HTS -- Horizontal tab stop */
2181 term.tabs[term.c.x] = 1;
2182 term.esc = 0;
2183 break;
2184 case 'M': /* RI -- Reverse index */
2185 if(term.c.y == term.top) {
2186 tscrolldown(term.top, 1);
2187 } else {
2188 tmoveto(term.c.x, term.c.y-1);
2189 }
2190 term.esc = 0;
2191 break;
2192 case 'Z': /* DECID -- Identify Terminal */
2193 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2194 term.esc = 0;
2195 break;
2196 case 'c': /* RIS -- Reset to inital state */
2197 treset();
2198 term.esc = 0;
2199 xresettitle();
2200 break;
2201 case '=': /* DECPAM -- Application keypad */
2202 term.mode |= MODE_APPKEYPAD;
2203 term.esc = 0;
2204 break;
2205 case '>': /* DECPNM -- Normal keypad */
2206 term.mode &= ~MODE_APPKEYPAD;
2207 term.esc = 0;
2208 break;
2209 case '7': /* DECSC -- Save Cursor */
2210 tcursor(CURSOR_SAVE);
2211 term.esc = 0;
2212 break;
2213 case '8': /* DECRC -- Restore Cursor */
2214 tcursor(CURSOR_LOAD);
2215 term.esc = 0;
2216 break;
2217 case '\\': /* ST -- Stop */
2218 term.esc = 0;
2219 break;
2220 default:
2221 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2222 (uchar) ascii, isprint(ascii)? ascii:'.');
2223 term.esc = 0;
2224 }
2225 }
2226 /*
2227 * All characters which form part of a sequence are not
2228 * printed
2229 */
2230 return;
2231 }
2232 /*
2233 * Display control codes only if we are in graphic mode
2234 */
2235 if(control && !(term.c.attr.mode & ATTR_GFX))
2236 return;
2237 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2238 sel.bx = -1;
2239 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2240 tnewline(1); /* always go to first col */
2241
2242 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2243 memmove(&term.line[term.c.y][term.c.x+1],
2244 &term.line[term.c.y][term.c.x],
2245 (term.col - term.c.x - 1) * sizeof(Glyph));
2246 }
2247
2248 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2249 if(term.c.x+1 < term.col) {
2250 tmoveto(term.c.x+1, term.c.y);
2251 } else {
2252 term.c.state |= CURSOR_WRAPNEXT;
2253 }
2254 }
2255
2256 int
2257 tresize(int col, int row) {
2258 int i, x;
2259 int minrow = MIN(row, term.row);
2260 int mincol = MIN(col, term.col);
2261 int slide = term.c.y - row + 1;
2262 bool *bp;
2263
2264 if(col < 1 || row < 1)
2265 return 0;
2266
2267 /* free unneeded rows */
2268 i = 0;
2269 if(slide > 0) {
2270 /*
2271 * slide screen to keep cursor where we expect it -
2272 * tscrollup would work here, but we can optimize to
2273 * memmove because we're freeing the earlier lines
2274 */
2275 for(/* i = 0 */; i < slide; i++) {
2276 free(term.line[i]);
2277 free(term.alt[i]);
2278 }
2279 memmove(term.line, term.line + slide, row * sizeof(Line));
2280 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2281 }
2282 for(i += row; i < term.row; i++) {
2283 free(term.line[i]);
2284 free(term.alt[i]);
2285 }
2286
2287 /* resize to new height */
2288 term.line = xrealloc(term.line, row * sizeof(Line));
2289 term.alt = xrealloc(term.alt, row * sizeof(Line));
2290 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2291 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2292
2293 /* resize each row to new width, zero-pad if needed */
2294 for(i = 0; i < minrow; i++) {
2295 term.dirty[i] = 1;
2296 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2297 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2298 for(x = mincol; x < col; x++) {
2299 term.line[i][x].state = 0;
2300 term.alt[i][x].state = 0;
2301 }
2302 }
2303
2304 /* allocate any new rows */
2305 for(/* i == minrow */; i < row; i++) {
2306 term.dirty[i] = 1;
2307 term.line[i] = xcalloc(col, sizeof(Glyph));
2308 term.alt [i] = xcalloc(col, sizeof(Glyph));
2309 }
2310 if(col > term.col) {
2311 bp = term.tabs + term.col;
2312
2313 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2314 while(--bp > term.tabs && !*bp)
2315 /* nothing */ ;
2316 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2317 *bp = 1;
2318 }
2319 /* update terminal size */
2320 term.col = col;
2321 term.row = row;
2322 /* reset scrolling region */
2323 tsetscroll(0, row-1);
2324 /* make use of the LIMIT in tmoveto */
2325 tmoveto(term.c.x, term.c.y);
2326
2327 return (slide > 0);
2328 }
2329
2330 void
2331 xresize(int col, int row) {
2332 xw.tw = MAX(1, col * xw.cw);
2333 xw.th = MAX(1, row * xw.ch);
2334
2335 XFreePixmap(xw.dpy, xw.buf);
2336 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2337 DefaultDepth(xw.dpy, xw.scr));
2338 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg].pixel);
2339 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2340
2341 XftDrawChange(xw.draw, xw.buf);
2342 }
2343
2344 static inline ushort
2345 sixd_to_16bit(int x) {
2346 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2347 }
2348
2349 void
2350 xloadcols(void) {
2351 int i, r, g, b;
2352 XRenderColor color = { .alpha = 0xffff };
2353
2354 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2355 for(i = 0; i < LEN(colorname); i++) {
2356 if(!colorname[i])
2357 continue;
2358 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2359 die("Could not allocate color '%s'\n", colorname[i]);
2360 }
2361 }
2362
2363 /* load colors [16-255] ; same colors as xterm */
2364 for(i = 16, r = 0; r < 6; r++) {
2365 for(g = 0; g < 6; g++) {
2366 for(b = 0; b < 6; b++) {
2367 color.red = sixd_to_16bit(r);
2368 color.green = sixd_to_16bit(g);
2369 color.blue = sixd_to_16bit(b);
2370 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2371 die("Could not allocate color %d\n", i);
2372 }
2373 i++;
2374 }
2375 }
2376 }
2377
2378 for(r = 0; r < 24; r++, i++) {
2379 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2380 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2381 &dc.col[i])) {
2382 die("Could not allocate color %d\n", i);
2383 }
2384 }
2385 }
2386
2387 int
2388 xsetcolorname(int x, const char *name) {
2389 XRenderColor color = { .alpha = 0xffff };
2390 Colour colour;
2391 if (x < 0 || x > LEN(colorname))
2392 return -1;
2393 if(!name) {
2394 if(16 <= x && x < 16 + 216) {
2395 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2396 color.red = sixd_to_16bit(r);
2397 color.green = sixd_to_16bit(g);
2398 color.blue = sixd_to_16bit(b);
2399 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2400 return 0; /* something went wrong */
2401 dc.col[x] = colour;
2402 return 1;
2403 } else if (16 + 216 <= x && x < 256) {
2404 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2405 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2406 return 0; /* something went wrong */
2407 dc.col[x] = colour;
2408 return 1;
2409 } else {
2410 name = colorname[x];
2411 }
2412 }
2413 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2414 return 0;
2415 dc.col[x] = colour;
2416 return 1;
2417 }
2418
2419 void
2420 xtermclear(int col1, int row1, int col2, int row2) {
2421 XftDrawRect(xw.draw,
2422 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2423 borderpx + col1 * xw.cw,
2424 borderpx + row1 * xw.ch,
2425 (col2-col1+1) * xw.cw,
2426 (row2-row1+1) * xw.ch);
2427 }
2428
2429 /*
2430 * Absolute coordinates.
2431 */
2432 void
2433 xclear(int x1, int y1, int x2, int y2) {
2434 XftDrawRect(xw.draw,
2435 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2436 x1, y1, x2-x1, y2-y1);
2437 }
2438
2439 void
2440 xhints(void) {
2441 XClassHint class = {opt_class ? opt_class : termname, termname};
2442 XWMHints wm = {.flags = InputHint, .input = 1};
2443 XSizeHints *sizeh = NULL;
2444
2445 sizeh = XAllocSizeHints();
2446 if(xw.isfixed == False) {
2447 sizeh->flags = PSize | PResizeInc | PBaseSize;
2448 sizeh->height = xw.h;
2449 sizeh->width = xw.w;
2450 sizeh->height_inc = xw.ch;
2451 sizeh->width_inc = xw.cw;
2452 sizeh->base_height = 2 * borderpx;
2453 sizeh->base_width = 2 * borderpx;
2454 } else {
2455 sizeh->flags = PMaxSize | PMinSize;
2456 sizeh->min_width = sizeh->max_width = xw.fw;
2457 sizeh->min_height = sizeh->max_height = xw.fh;
2458 }
2459
2460 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2461 XFree(sizeh);
2462 }
2463
2464 int
2465 xloadfont(Font *f, FcPattern *pattern) {
2466 FcPattern *match;
2467 FcResult result;
2468
2469 match = FcFontMatch(NULL, pattern, &result);
2470 if(!match)
2471 return 1;
2472
2473 if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
2474 FcPatternDestroy(match);
2475 return 1;
2476 }
2477
2478 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2479 FcPatternDestroy(match);
2480 return 1;
2481 }
2482
2483 f->pattern = FcPatternDuplicate(pattern);
2484
2485 f->ascent = f->match->ascent;
2486 f->descent = f->match->descent;
2487 f->lbearing = 0;
2488 f->rbearing = f->match->max_advance_width;
2489
2490 f->height = f->ascent + f->descent;
2491 f->width = f->lbearing + f->rbearing;
2492
2493 return 0;
2494 }
2495
2496 void
2497 xloadfonts(char *fontstr, int fontsize) {
2498 FcPattern *pattern;
2499 FcResult result;
2500 double fontval;
2501
2502 if(fontstr[0] == '-') {
2503 pattern = XftXlfdParse(fontstr, False, False);
2504 } else {
2505 pattern = FcNameParse((FcChar8 *)fontstr);
2506 }
2507
2508 if(!pattern)
2509 die("st: can't open font %s\n", fontstr);
2510
2511 if(fontsize > 0) {
2512 FcPatternDel(pattern, FC_PIXEL_SIZE);
2513 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2514 usedfontsize = fontsize;
2515 } else {
2516 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2517 if(result == FcResultMatch) {
2518 usedfontsize = (int)fontval;
2519 } else {
2520 /*
2521 * Default font size is 12, if none given. This is to
2522 * have a known usedfontsize value.
2523 */
2524 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2525 usedfontsize = 12;
2526 }
2527 }
2528
2529 FcConfigSubstitute(0, pattern, FcMatchPattern);
2530 FcDefaultSubstitute(pattern);
2531
2532 if(xloadfont(&dc.font, pattern))
2533 die("st: can't open font %s\n", fontstr);
2534
2535 /* Setting character width and height. */
2536 xw.cw = dc.font.width;
2537 xw.ch = dc.font.height;
2538
2539 FcPatternDel(pattern, FC_SLANT);
2540 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2541 if(xloadfont(&dc.ifont, pattern))
2542 die("st: can't open font %s\n", fontstr);
2543
2544 FcPatternDel(pattern, FC_WEIGHT);
2545 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2546 if(xloadfont(&dc.ibfont, pattern))
2547 die("st: can't open font %s\n", fontstr);
2548
2549 FcPatternDel(pattern, FC_SLANT);
2550 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2551 if(xloadfont(&dc.bfont, pattern))
2552 die("st: can't open font %s\n", fontstr);
2553
2554 FcPatternDestroy(pattern);
2555 }
2556
2557 void
2558 xunloadfonts(void) {
2559 int i, ip;
2560
2561 /*
2562 * Free the loaded fonts in the font cache. This is done backwards
2563 * from the frccur.
2564 */
2565 for(i = 0, ip = frccur; i < frclen; i++, ip--) {
2566 if(ip < 0)
2567 ip = LEN(frc) - 1;
2568 XftFontClose(xw.dpy, frc[ip].font);
2569 }
2570 frccur = -1;
2571 frclen = 0;
2572
2573 XftFontClose(xw.dpy, dc.font.match);
2574 FcPatternDestroy(dc.font.pattern);
2575 FcFontSetDestroy(dc.font.set);
2576 XftFontClose(xw.dpy, dc.bfont.match);
2577 FcPatternDestroy(dc.bfont.pattern);
2578 FcFontSetDestroy(dc.bfont.set);
2579 XftFontClose(xw.dpy, dc.ifont.match);
2580 FcPatternDestroy(dc.ifont.pattern);
2581 FcFontSetDestroy(dc.ifont.set);
2582 XftFontClose(xw.dpy, dc.ibfont.match);
2583 FcPatternDestroy(dc.ibfont.pattern);
2584 FcFontSetDestroy(dc.ibfont.set);
2585 }
2586
2587 void
2588 xzoom(const Arg *arg) {
2589 xunloadfonts();
2590 xloadfonts(usedfont, usedfontsize + arg->i);
2591 cresize(0, 0);
2592 redraw(0);
2593 }
2594
2595 void
2596 xinit(void) {
2597 XSetWindowAttributes attrs;
2598 XGCValues gcvalues;
2599 Cursor cursor;
2600 Window parent;
2601 int sw, sh;
2602
2603 if(!(xw.dpy = XOpenDisplay(NULL)))
2604 die("Can't open display\n");
2605 xw.scr = XDefaultScreen(xw.dpy);
2606 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2607
2608 /* font */
2609 if(!FcInit())
2610 die("Could not init fontconfig.\n");
2611
2612 usedfont = (opt_font == NULL)? font : opt_font;
2613 xloadfonts(usedfont, 0);
2614
2615 /* colors */
2616 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2617 xloadcols();
2618
2619 /* adjust fixed window geometry */
2620 if(xw.isfixed) {
2621 sw = DisplayWidth(xw.dpy, xw.scr);
2622 sh = DisplayHeight(xw.dpy, xw.scr);
2623 if(xw.fx < 0)
2624 xw.fx = sw + xw.fx - xw.fw - 1;
2625 if(xw.fy < 0)
2626 xw.fy = sh + xw.fy - xw.fh - 1;
2627
2628 xw.h = xw.fh;
2629 xw.w = xw.fw;
2630 } else {
2631 /* window - default size */
2632 xw.h = 2 * borderpx + term.row * xw.ch;
2633 xw.w = 2 * borderpx + term.col * xw.cw;
2634 xw.fx = 0;
2635 xw.fy = 0;
2636 }
2637
2638 /* Events */
2639 attrs.background_pixel = dc.col[defaultbg].pixel;
2640 attrs.border_pixel = dc.col[defaultbg].pixel;
2641 attrs.bit_gravity = NorthWestGravity;
2642 attrs.event_mask = FocusChangeMask | KeyPressMask
2643 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2644 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2645 attrs.colormap = xw.cmap;
2646
2647 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2648 XRootWindow(xw.dpy, xw.scr);
2649 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2650 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2651 xw.vis,
2652 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2653 | CWColormap,
2654 &attrs);
2655
2656 memset(&gcvalues, 0, sizeof(gcvalues));
2657 gcvalues.graphics_exposures = False;
2658 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2659 &gcvalues);
2660 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2661 DefaultDepth(xw.dpy, xw.scr));
2662 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2663 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2664
2665 /* Xft rendering context */
2666 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2667
2668 /* input methods */
2669 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2670 XSetLocaleModifiers("@im=local");
2671 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2672 XSetLocaleModifiers("@im=");
2673 if((xw.xim = XOpenIM(xw.dpy,
2674 NULL, NULL, NULL)) == NULL) {
2675 die("XOpenIM failed. Could not open input"
2676 " device.\n");
2677 }
2678 }
2679 }
2680 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2681 | XIMStatusNothing, XNClientWindow, xw.win,
2682 XNFocusWindow, xw.win, NULL);
2683 if(xw.xic == NULL)
2684 die("XCreateIC failed. Could not obtain input method.\n");
2685
2686 /* white cursor, black outline */
2687 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2688 XDefineCursor(xw.dpy, xw.win, cursor);
2689 XRecolorCursor(xw.dpy, cursor,
2690 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2691 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2692
2693 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2694 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2695 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2696
2697 xresettitle();
2698 XMapWindow(xw.dpy, xw.win);
2699 xhints();
2700 XSync(xw.dpy, 0);
2701 }
2702
2703 void
2704 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2705 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2706 width = charlen * xw.cw, xp, i;
2707 int frp, frcflags;
2708 int u8fl, u8fblen, u8cblen, doesexist;
2709 char *u8c, *u8fs;
2710 long u8char;
2711 Font *font = &dc.font;
2712 FcResult fcres;
2713 FcPattern *fcpattern, *fontpattern;
2714 FcFontSet *fcsets[] = { NULL };
2715 FcCharSet *fccharset;
2716 Colour *fg, *bg, *temp, revfg, revbg;
2717 XRenderColor colfg, colbg;
2718
2719 frcflags = FRC_NORMAL;
2720
2721 if(base.mode & ATTR_ITALIC) {
2722 if(base.fg == defaultfg)
2723 base.fg = defaultitalic;
2724 font = &dc.ifont;
2725 frcflags = FRC_ITALIC;
2726 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2727 if(base.fg == defaultfg)
2728 base.fg = defaultitalic;
2729 font = &dc.ibfont;
2730 frcflags = FRC_ITALICBOLD;
2731 } else if(base.mode & ATTR_UNDERLINE) {
2732 if(base.fg == defaultfg)
2733 base.fg = defaultunderline;
2734 }
2735 fg = &dc.col[base.fg];
2736 bg = &dc.col[base.bg];
2737
2738 if(base.mode & ATTR_BOLD) {
2739 if(BETWEEN(base.fg, 0, 7)) {
2740 /* basic system colors */
2741 fg = &dc.col[base.fg + 8];
2742 } else if(BETWEEN(base.fg, 16, 195)) {
2743 /* 256 colors */
2744 fg = &dc.col[base.fg + 36];
2745 } else if(BETWEEN(base.fg, 232, 251)) {
2746 /* greyscale */
2747 fg = &dc.col[base.fg + 4];
2748 }
2749 /*
2750 * Those ranges will not be brightened:
2751 * 8 - 15 – bright system colors
2752 * 196 - 231 – highest 256 color cube
2753 * 252 - 255 – brightest colors in greyscale
2754 */
2755 font = &dc.bfont;
2756 frcflags = FRC_BOLD;
2757 }
2758
2759 if(IS_SET(MODE_REVERSE)) {
2760 if(fg == &dc.col[defaultfg]) {
2761 fg = &dc.col[defaultbg];
2762 } else {
2763 colfg.red = ~fg->color.red;
2764 colfg.green = ~fg->color.green;
2765 colfg.blue = ~fg->color.blue;
2766 colfg.alpha = fg->color.alpha;
2767 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2768 fg = &revfg;
2769 }
2770
2771 if(bg == &dc.col[defaultbg]) {
2772 bg = &dc.col[defaultfg];
2773 } else {
2774 colbg.red = ~bg->color.red;
2775 colbg.green = ~bg->color.green;
2776 colbg.blue = ~bg->color.blue;
2777 colbg.alpha = bg->color.alpha;
2778 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2779 bg = &revbg;
2780 }
2781 }
2782
2783 if(base.mode & ATTR_REVERSE) {
2784 temp = fg;
2785 fg = bg;
2786 bg = temp;
2787 }
2788
2789 /* Intelligent cleaning up of the borders. */
2790 if(x == 0) {
2791 xclear(0, (y == 0)? 0 : winy, borderpx,
2792 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2793 }
2794 if(x + charlen >= term.col) {
2795 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2796 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2797 }
2798 if(y == 0)
2799 xclear(winx, 0, winx + width, borderpx);
2800 if(y == term.row-1)
2801 xclear(winx, winy + xw.ch, winx + width, xw.h);
2802
2803 /* Clean up the region we want to draw to. */
2804 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2805
2806 fcsets[0] = font->set;
2807 for(xp = winx; bytelen > 0;) {
2808 /*
2809 * Search for the range in the to be printed string of glyphs
2810 * that are in the main font. Then print that range. If
2811 * some glyph is found that is not in the font, do the
2812 * fallback dance.
2813 */
2814 u8fs = s;
2815 u8fblen = 0;
2816 u8fl = 0;
2817 for(;;) {
2818 u8c = s;
2819 u8cblen = utf8decode(s, &u8char);
2820 s += u8cblen;
2821 bytelen -= u8cblen;
2822
2823 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
2824 if(!doesexist || bytelen <= 0) {
2825 if(bytelen <= 0) {
2826 if(doesexist) {
2827 u8fl++;
2828 u8fblen += u8cblen;
2829 }
2830 }
2831
2832 if(u8fl > 0) {
2833 XftDrawStringUtf8(xw.draw, fg,
2834 font->match, xp,
2835 winy + font->ascent,
2836 (FcChar8 *)u8fs,
2837 u8fblen);
2838 xp += font->width * u8fl;
2839 }
2840 break;
2841 }
2842
2843 u8fl++;
2844 u8fblen += u8cblen;
2845 }
2846 if(doesexist)
2847 break;
2848
2849 frp = frccur;
2850 /* Search the font cache. */
2851 for(i = 0; i < frclen; i++, frp--) {
2852 if(frp <= 0)
2853 frp = LEN(frc) - 1;
2854
2855 if(frc[frp].c == u8char
2856 && frc[frp].flags == frcflags) {
2857 break;
2858 }
2859 }
2860
2861 /* Nothing was found. */
2862 if(i >= frclen) {
2863 /*
2864 * Nothing was found in the cache. Now use
2865 * some dozen of Fontconfig calls to get the
2866 * font for one single character.
2867 */
2868 fcpattern = FcPatternDuplicate(font->pattern);
2869 fccharset = FcCharSetCreate();
2870
2871 FcCharSetAddChar(fccharset, u8char);
2872 FcPatternAddCharSet(fcpattern, FC_CHARSET,
2873 fccharset);
2874 FcPatternAddBool(fcpattern, FC_SCALABLE,
2875 FcTrue);
2876
2877 FcConfigSubstitute(0, fcpattern,
2878 FcMatchPattern);
2879 FcDefaultSubstitute(fcpattern);
2880
2881 fontpattern = FcFontSetMatch(0, fcsets,
2882 FcTrue, fcpattern, &fcres);
2883
2884 /*
2885 * Overwrite or create the new cache entry.
2886 */
2887 frccur++;
2888 frclen++;
2889 if(frccur >= LEN(frc))
2890 frccur = 0;
2891 if(frclen > LEN(frc)) {
2892 frclen = LEN(frc);
2893 XftFontClose(xw.dpy, frc[frccur].font);
2894 }
2895
2896 frc[frccur].font = XftFontOpenPattern(xw.dpy,
2897 fontpattern);
2898 frc[frccur].c = u8char;
2899 frc[frccur].flags = frcflags;
2900
2901 FcPatternDestroy(fcpattern);
2902 FcCharSetDestroy(fccharset);
2903
2904 frp = frccur;
2905 }
2906
2907 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
2908 xp, winy + frc[frp].font->ascent,
2909 (FcChar8 *)u8c, u8cblen);
2910
2911 xp += font->width;
2912 }
2913
2914 /*
2915 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
2916 winy + font->ascent, (FcChar8 *)s, bytelen);
2917 */
2918
2919 if(base.mode & ATTR_UNDERLINE) {
2920 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
2921 width, 1);
2922 }
2923 }
2924
2925 void
2926 xdrawcursor(void) {
2927 static int oldx = 0, oldy = 0;
2928 int sl;
2929 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs, 0};
2930
2931 LIMIT(oldx, 0, term.col-1);
2932 LIMIT(oldy, 0, term.row-1);
2933
2934 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2935 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2936
2937 /* remove the old cursor */
2938 if(term.line[oldy][oldx].state & GLYPH_SET) {
2939 sl = utf8size(term.line[oldy][oldx].c);
2940 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2941 oldy, 1, sl);
2942 } else {
2943 xtermclear(oldx, oldy, oldx, oldy);
2944 }
2945
2946 /* draw the new one */
2947 if(!(IS_SET(MODE_HIDE))) {
2948 if(!(xw.state & WIN_FOCUSED))
2949 g.bg = defaultucs;
2950
2951 if(IS_SET(MODE_REVERSE))
2952 g.mode |= ATTR_REVERSE, g.fg = defaultcs, g.bg = defaultfg;
2953
2954 sl = utf8size(g.c);
2955 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2956 oldx = term.c.x, oldy = term.c.y;
2957 }
2958 }
2959
2960
2961 void
2962 xsettitle(char *p) {
2963 XTextProperty prop;
2964
2965 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
2966 &prop);
2967 XSetWMName(xw.dpy, xw.win, &prop);
2968 }
2969
2970 void
2971 xresettitle(void) {
2972 xsettitle(opt_title ? opt_title : "st");
2973 }
2974
2975 void
2976 redraw(int timeout) {
2977 struct timespec tv = {0, timeout * 1000};
2978
2979 tfulldirt();
2980 draw();
2981
2982 if(timeout > 0) {
2983 nanosleep(&tv, NULL);
2984 XSync(xw.dpy, False); /* necessary for a good tput flash */
2985 }
2986 }
2987
2988 void
2989 draw(void) {
2990 drawregion(0, 0, term.col, term.row);
2991 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
2992 xw.h, 0, 0);
2993 XSetForeground(xw.dpy, dc.gc,
2994 dc.col[IS_SET(MODE_REVERSE)?
2995 defaultfg : defaultbg].pixel);
2996 }
2997
2998 void
2999 drawregion(int x1, int y1, int x2, int y2) {
3000 int ic, ib, x, y, ox, sl;
3001 Glyph base, new;
3002 char buf[DRAW_BUF_SIZ];
3003 bool ena_sel = sel.bx != -1;
3004
3005 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3006 ena_sel = 0;
3007
3008 if(!(xw.state & WIN_VISIBLE))
3009 return;
3010
3011 for(y = y1; y < y2; y++) {
3012 if(!term.dirty[y])
3013 continue;
3014
3015 xtermclear(0, y, term.col, y);
3016 term.dirty[y] = 0;
3017 base = term.line[y][0];
3018 ic = ib = ox = 0;
3019 for(x = x1; x < x2; x++) {
3020 new = term.line[y][x];
3021 if(ena_sel && *(new.c) && selected(x, y))
3022 new.mode ^= ATTR_REVERSE;
3023 if(ib > 0 && (!(new.state & GLYPH_SET)
3024 || ATTRCMP(base, new)
3025 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3026 xdraws(buf, base, ox, y, ic, ib);
3027 ic = ib = 0;
3028 }
3029 if(new.state & GLYPH_SET) {
3030 if(ib == 0) {
3031 ox = x;
3032 base = new;
3033 }
3034
3035 sl = utf8size(new.c);
3036 memcpy(buf+ib, new.c, sl);
3037 ib += sl;
3038 ++ic;
3039 }
3040 }
3041 if(ib > 0)
3042 xdraws(buf, base, ox, y, ic, ib);
3043 }
3044 xdrawcursor();
3045 }
3046
3047 void
3048 expose(XEvent *ev) {
3049 XExposeEvent *e = &ev->xexpose;
3050
3051 if(xw.state & WIN_REDRAW) {
3052 if(!e->count)
3053 xw.state &= ~WIN_REDRAW;
3054 }
3055 redraw(0);
3056 }
3057
3058 void
3059 visibility(XEvent *ev) {
3060 XVisibilityEvent *e = &ev->xvisibility;
3061
3062 if(e->state == VisibilityFullyObscured) {
3063 xw.state &= ~WIN_VISIBLE;
3064 } else if(!(xw.state & WIN_VISIBLE)) {
3065 /* need a full redraw for next Expose, not just a buf copy */
3066 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3067 }
3068 }
3069
3070 void
3071 unmap(XEvent *ev) {
3072 xw.state &= ~WIN_VISIBLE;
3073 }
3074
3075 void
3076 xseturgency(int add) {
3077 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3078
3079 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3080 XSetWMHints(xw.dpy, xw.win, h);
3081 XFree(h);
3082 }
3083
3084 void
3085 focus(XEvent *ev) {
3086 XFocusChangeEvent *e = &ev->xfocus;
3087
3088 if(e->mode == NotifyGrab)
3089 return;
3090
3091 if(ev->type == FocusIn) {
3092 XSetICFocus(xw.xic);
3093 xw.state |= WIN_FOCUSED;
3094 xseturgency(0);
3095 } else {
3096 XUnsetICFocus(xw.xic);
3097 xw.state &= ~WIN_FOCUSED;
3098 }
3099 }
3100
3101 inline bool
3102 match(uint mask, uint state) {
3103 state &= ~(ignoremod);
3104
3105 if(mask == XK_NO_MOD && state)
3106 return false;
3107 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3108 return false;
3109 if((state & mask) != state)
3110 return false;
3111 return true;
3112 }
3113
3114 void
3115 numlock(const Arg *dummy) {
3116 term.numlock ^= 1;
3117 }
3118
3119 char*
3120 kmap(KeySym k, uint state) {
3121 uint mask;
3122 Key *kp;
3123 int i;
3124
3125 /* Check for mapped keys out of X11 function keys. */
3126 for(i = 0; i < LEN(mappedkeys); i++) {
3127 if(mappedkeys[i] == k)
3128 break;
3129 }
3130 if(i == LEN(mappedkeys)) {
3131 if((k & 0xFFFF) < 0xFD00)
3132 return NULL;
3133 }
3134
3135 for(kp = key; kp < key + LEN(key); kp++) {
3136 mask = kp->mask;
3137
3138 if(kp->k != k)
3139 continue;
3140
3141 if(!match(mask, state))
3142 continue;
3143
3144 if(kp->appkey > 0) {
3145 if(!IS_SET(MODE_APPKEYPAD))
3146 continue;
3147 if(term.numlock && kp->appkey == 2)
3148 continue;
3149 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3150 continue;
3151 }
3152
3153 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3154 (kp->appcursor > 0
3155 && !IS_SET(MODE_APPCURSOR))) {
3156 continue;
3157 }
3158
3159 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3160 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3161 continue;
3162 }
3163
3164 return kp->s;
3165 }
3166
3167 return NULL;
3168 }
3169
3170 void
3171 kpress(XEvent *ev) {
3172 XKeyEvent *e = &ev->xkey;
3173 KeySym ksym;
3174 char xstr[31], buf[32], *customkey, *cp = buf;
3175 int len;
3176 Status status;
3177 Shortcut *bp;
3178
3179 if(IS_SET(MODE_KBDLOCK))
3180 return;
3181
3182 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3183 e->state &= ~Mod2Mask;
3184 /* 1. shortcuts */
3185 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3186 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3187 bp->func(&(bp->arg));
3188 return;
3189 }
3190 }
3191
3192 /* 2. custom keys from config.h */
3193 if((customkey = kmap(ksym, e->state))) {
3194 len = strlen(customkey);
3195 memcpy(buf, customkey, len);
3196 /* 2. hardcoded (overrides X lookup) */
3197 } else {
3198 if(len == 0)
3199 return;
3200
3201 if(len == 1 && e->state & Mod1Mask)
3202 *cp++ = '\033';
3203
3204 memcpy(cp, xstr, len);
3205 len = cp - buf + len;
3206 }
3207
3208 ttywrite(buf, len);
3209 if(IS_SET(MODE_ECHO))
3210 techo(buf, len);
3211 }
3212
3213
3214 void
3215 cmessage(XEvent *e) {
3216 /*
3217 * See xembed specs
3218 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3219 */
3220 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3221 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3222 xw.state |= WIN_FOCUSED;
3223 xseturgency(0);
3224 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3225 xw.state &= ~WIN_FOCUSED;
3226 }
3227 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3228 /* Send SIGHUP to shell */
3229 kill(pid, SIGHUP);
3230 exit(EXIT_SUCCESS);
3231 }
3232 }
3233
3234 void
3235 cresize(int width, int height) {
3236 int col, row;
3237
3238 if(width != 0)
3239 xw.w = width;
3240 if(height != 0)
3241 xw.h = height;
3242
3243 col = (xw.w - 2 * borderpx) / xw.cw;
3244 row = (xw.h - 2 * borderpx) / xw.ch;
3245
3246 tresize(col, row);
3247 xresize(col, row);
3248 ttyresize();
3249 }
3250
3251 void
3252 resize(XEvent *e) {
3253 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3254 return;
3255
3256 cresize(e->xconfigure.width, e->xconfigure.height);
3257 }
3258
3259 void
3260 run(void) {
3261 XEvent ev;
3262 fd_set rfd;
3263 int xfd = XConnectionNumber(xw.dpy), xev;
3264 struct timeval drawtimeout, *tv = NULL, now, last;
3265
3266 gettimeofday(&last, NULL);
3267
3268 for(xev = actionfps;;) {
3269 FD_ZERO(&rfd);
3270 FD_SET(cmdfd, &rfd);
3271 FD_SET(xfd, &rfd);
3272 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3273 if(errno == EINTR)
3274 continue;
3275 die("select failed: %s\n", SERRNO);
3276 }
3277
3278 gettimeofday(&now, NULL);
3279 drawtimeout.tv_sec = 0;
3280 drawtimeout.tv_usec = (1000/xfps) * 1000;
3281 tv = &drawtimeout;
3282
3283 if(FD_ISSET(cmdfd, &rfd))
3284 ttyread();
3285
3286 if(FD_ISSET(xfd, &rfd))
3287 xev = actionfps;
3288
3289 if(TIMEDIFF(now, last) > \
3290 (xev ? (1000/xfps) : (1000/actionfps))) {
3291 while(XPending(xw.dpy)) {
3292 XNextEvent(xw.dpy, &ev);
3293 if(XFilterEvent(&ev, None))
3294 continue;
3295 if(handler[ev.type])
3296 (handler[ev.type])(&ev);
3297 }
3298
3299 draw();
3300 XFlush(xw.dpy);
3301 last = now;
3302
3303 if(xev && !FD_ISSET(xfd, &rfd))
3304 xev--;
3305 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd))
3306 tv = NULL;
3307 }
3308 }
3309 }
3310
3311 void
3312 usage(void) {
3313 die("%s " VERSION " (c) 2010-2013 st engineers\n" \
3314 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3315 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3316 }
3317
3318 int
3319 main(int argc, char *argv[]) {
3320 int bitm, xr, yr;
3321 uint wr, hr;
3322
3323 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3324 xw.isfixed = False;
3325
3326 ARGBEGIN {
3327 case 'a':
3328 allowaltscreen = false;
3329 break;
3330 case 'c':
3331 opt_class = EARGF(usage());
3332 break;
3333 case 'e':
3334 /* eat all remaining arguments */
3335 opt_cmd = &argv[1];
3336 goto run;
3337 case 'f':
3338 opt_font = EARGF(usage());
3339 break;
3340 case 'g':
3341 bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
3342 if(bitm & XValue)
3343 xw.fx = xr;
3344 if(bitm & YValue)
3345 xw.fy = yr;
3346 if(bitm & WidthValue)
3347 xw.fw = (int)wr;
3348 if(bitm & HeightValue)
3349 xw.fh = (int)hr;
3350 if(bitm & XNegative && xw.fx == 0)
3351 xw.fx = -1;
3352 if(bitm & XNegative && xw.fy == 0)
3353 xw.fy = -1;
3354
3355 if(xw.fh != 0 && xw.fw != 0)
3356 xw.isfixed = True;
3357 break;
3358 case 'o':
3359 opt_io = EARGF(usage());
3360 break;
3361 case 't':
3362 opt_title = EARGF(usage());
3363 break;
3364 case 'w':
3365 opt_embed = EARGF(usage());
3366 break;
3367 case 'v':
3368 default:
3369 usage();
3370 } ARGEND;
3371
3372 run:
3373 setlocale(LC_CTYPE, "");
3374 XSetLocaleModifiers("");
3375 tnew(80, 24);
3376 xinit();
3377 ttynew();
3378 selinit();
3379 run();
3380
3381 return 0;
3382 }
3383