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Selection snapping is now considering wrapping.
[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 MODE_BLINK = 16384,
120 MODE_FBLINK = 32768,
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 enum selection_snap {
144 SNAP_WORD = 1,
145 SNAP_LINE = 2
146 };
147
148 /* bit macro */
149 #undef B0
150 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
151
152 typedef unsigned char uchar;
153 typedef unsigned int uint;
154 typedef unsigned long ulong;
155 typedef unsigned short ushort;
156
157 typedef struct {
158 char c[UTF_SIZ]; /* character code */
159 uchar mode; /* attribute flags */
160 ushort fg; /* foreground */
161 ushort bg; /* background */
162 } Glyph;
163
164 typedef Glyph *Line;
165
166 typedef struct {
167 Glyph attr; /* current char attributes */
168 int x;
169 int y;
170 char state;
171 } TCursor;
172
173 /* CSI Escape sequence structs */
174 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
175 typedef struct {
176 char buf[ESC_BUF_SIZ]; /* raw string */
177 int len; /* raw string length */
178 char priv;
179 int arg[ESC_ARG_SIZ];
180 int narg; /* nb of args */
181 char mode;
182 } CSIEscape;
183
184 /* STR Escape sequence structs */
185 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
186 typedef struct {
187 char type; /* ESC type ... */
188 char buf[STR_BUF_SIZ]; /* raw string */
189 int len; /* raw string length */
190 char *args[STR_ARG_SIZ];
191 int narg; /* nb of args */
192 } STREscape;
193
194 /* Internal representation of the screen */
195 typedef struct {
196 int row; /* nb row */
197 int col; /* nb col */
198 Line *line; /* screen */
199 Line *alt; /* alternate screen */
200 bool *dirty; /* dirtyness of lines */
201 TCursor c; /* cursor */
202 int top; /* top scroll limit */
203 int bot; /* bottom scroll limit */
204 int mode; /* terminal mode flags */
205 int esc; /* escape state flags */
206 bool numlock; /* lock numbers in keyboard */
207 bool *tabs;
208 } Term;
209
210 /* Purely graphic info */
211 typedef struct {
212 Display *dpy;
213 Colourmap cmap;
214 Window win;
215 Drawable buf;
216 Atom xembed, wmdeletewin;
217 XIM xim;
218 XIC xic;
219 Draw draw;
220 Visual *vis;
221 int scr;
222 bool isfixed; /* is fixed geometry? */
223 int fx, fy, fw, fh; /* fixed geometry */
224 int tw, th; /* tty width and height */
225 int w, h; /* window width and height */
226 int ch; /* char height */
227 int cw; /* char width */
228 char state; /* focus, redraw, visible */
229 } XWindow;
230
231 typedef struct {
232 int b;
233 uint mask;
234 char s[ESC_BUF_SIZ];
235 } Mousekey;
236
237 typedef struct {
238 KeySym k;
239 uint mask;
240 char s[ESC_BUF_SIZ];
241 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
242 signed char appkey; /* application keypad */
243 signed char appcursor; /* application cursor */
244 signed char crlf; /* crlf mode */
245 } Key;
246
247 /* TODO: use better name for vars... */
248 typedef struct {
249 int mode;
250 int type;
251 int snap;
252 int bx, by;
253 int ex, ey;
254 struct {
255 int x, y;
256 } b, e;
257 char *clip;
258 Atom xtarget;
259 bool alt;
260 struct timeval tclick1;
261 struct timeval tclick2;
262 } Selection;
263
264 typedef union {
265 int i;
266 unsigned int ui;
267 float f;
268 const void *v;
269 } Arg;
270
271 typedef struct {
272 unsigned int mod;
273 KeySym keysym;
274 void (*func)(const Arg *);
275 const Arg arg;
276 } Shortcut;
277
278 /* function definitions used in config.h */
279 static void clippaste(const Arg *);
280 static void numlock(const Arg *);
281 static void selpaste(const Arg *);
282 static void xzoom(const Arg *);
283
284 /* Config.h for applying patches and the configuration. */
285 #include "config.h"
286
287 /* Font structure */
288 typedef struct {
289 int height;
290 int width;
291 int ascent;
292 int descent;
293 short lbearing;
294 short rbearing;
295 XftFont *match;
296 FcFontSet *set;
297 FcPattern *pattern;
298 } Font;
299
300 /* Drawing Context */
301 typedef struct {
302 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
303 Font font, bfont, ifont, ibfont;
304 GC gc;
305 } DC;
306
307 static void die(const char *, ...);
308 static void draw(void);
309 static void redraw(int);
310 static void drawregion(int, int, int, int);
311 static void execsh(void);
312 static void sigchld(int);
313 static void run(void);
314
315 static void csidump(void);
316 static void csihandle(void);
317 static void csiparse(void);
318 static void csireset(void);
319 static void strdump(void);
320 static void strhandle(void);
321 static void strparse(void);
322 static void strreset(void);
323
324 static int tattrset(int);
325 static void tclearregion(int, int, int, int);
326 static void tcursor(int);
327 static void tdeletechar(int);
328 static void tdeleteline(int);
329 static void tinsertblank(int);
330 static void tinsertblankline(int);
331 static void tmoveto(int, int);
332 static void tmoveato(int x, int y);
333 static void tnew(int, int);
334 static void tnewline(int);
335 static void tputtab(bool);
336 static void tputc(char *, int);
337 static void treset(void);
338 static int tresize(int, int);
339 static void tscrollup(int, int);
340 static void tscrolldown(int, int);
341 static void tsetattr(int*, int);
342 static void tsetchar(char *, Glyph *, int, int);
343 static void tsetscroll(int, int);
344 static void tswapscreen(void);
345 static void tsetdirt(int, int);
346 static void tsetdirtattr(int);
347 static void tsetmode(bool, bool, int *, int);
348 static void tfulldirt(void);
349 static void techo(char *, int);
350
351 static inline bool match(uint, uint);
352 static void ttynew(void);
353 static void ttyread(void);
354 static void ttyresize(void);
355 static void ttywrite(const char *, size_t);
356
357 static void xdraws(char *, Glyph, int, int, int, int);
358 static void xhints(void);
359 static void xclear(int, int, int, int);
360 static void xdrawcursor(void);
361 static void xinit(void);
362 static void xloadcols(void);
363 static int xsetcolorname(int, const char *);
364 static int xloadfont(Font *, FcPattern *);
365 static void xloadfonts(char *, int);
366 static void xsettitle(char *);
367 static void xresettitle(void);
368 static void xseturgency(int);
369 static void xsetsel(char*);
370 static void xtermclear(int, int, int, int);
371 static void xunloadfonts(void);
372 static void xresize(int, int);
373
374 static void expose(XEvent *);
375 static void visibility(XEvent *);
376 static void unmap(XEvent *);
377 static char *kmap(KeySym, uint);
378 static void kpress(XEvent *);
379 static void cmessage(XEvent *);
380 static void cresize(int, int);
381 static void resize(XEvent *);
382 static void focus(XEvent *);
383 static void brelease(XEvent *);
384 static void bpress(XEvent *);
385 static void bmotion(XEvent *);
386 static void selnotify(XEvent *);
387 static void selclear(XEvent *);
388 static void selrequest(XEvent *);
389
390 static void selinit(void);
391 static inline bool selected(int, int);
392 static void selcopy(void);
393 static void selscroll(int, int);
394 static void selsnap(int, int *, int *, int);
395
396 static int utf8decode(char *, long *);
397 static int utf8encode(long *, char *);
398 static int utf8size(char *);
399 static int isfullutf8(char *, int);
400
401 static ssize_t xwrite(int, char *, size_t);
402 static void *xmalloc(size_t);
403 static void *xrealloc(void *, size_t);
404 static void *xcalloc(size_t, size_t);
405
406 static void (*handler[LASTEvent])(XEvent *) = {
407 [KeyPress] = kpress,
408 [ClientMessage] = cmessage,
409 [ConfigureNotify] = resize,
410 [VisibilityNotify] = visibility,
411 [UnmapNotify] = unmap,
412 [Expose] = expose,
413 [FocusIn] = focus,
414 [FocusOut] = focus,
415 [MotionNotify] = bmotion,
416 [ButtonPress] = bpress,
417 [ButtonRelease] = brelease,
418 [SelectionClear] = selclear,
419 [SelectionNotify] = selnotify,
420 [SelectionRequest] = selrequest,
421 };
422
423 /* Globals */
424 static DC dc;
425 static XWindow xw;
426 static Term term;
427 static CSIEscape csiescseq;
428 static STREscape strescseq;
429 static int cmdfd;
430 static pid_t pid;
431 static Selection sel;
432 static int iofd = -1;
433 static char **opt_cmd = NULL;
434 static char *opt_io = NULL;
435 static char *opt_title = NULL;
436 static char *opt_embed = NULL;
437 static char *opt_class = NULL;
438 static char *opt_font = NULL;
439
440 static char *usedfont = NULL;
441 static int usedfontsize = 0;
442
443 /* Font Ring Cache */
444 enum {
445 FRC_NORMAL,
446 FRC_ITALIC,
447 FRC_BOLD,
448 FRC_ITALICBOLD
449 };
450
451 typedef struct {
452 XftFont *font;
453 long c;
454 int flags;
455 } Fontcache;
456
457 /*
458 * Fontcache is a ring buffer, with frccur as current position and frclen as
459 * the current length of used elements.
460 */
461
462 static Fontcache frc[1024];
463 static int frccur = -1, frclen = 0;
464
465 ssize_t
466 xwrite(int fd, char *s, size_t len) {
467 size_t aux = len;
468
469 while(len > 0) {
470 ssize_t r = write(fd, s, len);
471 if(r < 0)
472 return r;
473 len -= r;
474 s += r;
475 }
476 return aux;
477 }
478
479 void *
480 xmalloc(size_t len) {
481 void *p = malloc(len);
482
483 if(!p)
484 die("Out of memory\n");
485
486 return p;
487 }
488
489 void *
490 xrealloc(void *p, size_t len) {
491 if((p = realloc(p, len)) == NULL)
492 die("Out of memory\n");
493
494 return p;
495 }
496
497 void *
498 xcalloc(size_t nmemb, size_t size) {
499 void *p = calloc(nmemb, size);
500
501 if(!p)
502 die("Out of memory\n");
503
504 return p;
505 }
506
507 int
508 utf8decode(char *s, long *u) {
509 uchar c;
510 int i, n, rtn;
511
512 rtn = 1;
513 c = *s;
514 if(~c & B7) { /* 0xxxxxxx */
515 *u = c;
516 return rtn;
517 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
518 *u = c&(B4|B3|B2|B1|B0);
519 n = 1;
520 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
521 *u = c&(B3|B2|B1|B0);
522 n = 2;
523 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
524 *u = c & (B2|B1|B0);
525 n = 3;
526 } else {
527 goto invalid;
528 }
529
530 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
531 c = *s;
532 if((c & (B7|B6)) != B7) /* 10xxxxxx */
533 goto invalid;
534 *u <<= 6;
535 *u |= c & (B5|B4|B3|B2|B1|B0);
536 }
537
538 if((n == 1 && *u < 0x80) ||
539 (n == 2 && *u < 0x800) ||
540 (n == 3 && *u < 0x10000) ||
541 (*u >= 0xD800 && *u <= 0xDFFF)) {
542 goto invalid;
543 }
544
545 return rtn;
546 invalid:
547 *u = 0xFFFD;
548
549 return rtn;
550 }
551
552 int
553 utf8encode(long *u, char *s) {
554 uchar *sp;
555 ulong uc;
556 int i, n;
557
558 sp = (uchar *)s;
559 uc = *u;
560 if(uc < 0x80) {
561 *sp = uc; /* 0xxxxxxx */
562 return 1;
563 } else if(*u < 0x800) {
564 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
565 n = 1;
566 } else if(uc < 0x10000) {
567 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
568 n = 2;
569 } else if(uc <= 0x10FFFF) {
570 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
571 n = 3;
572 } else {
573 goto invalid;
574 }
575
576 for(i=n,++sp; i>0; --i,++sp)
577 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
578
579 return n+1;
580 invalid:
581 /* U+FFFD */
582 *s++ = '\xEF';
583 *s++ = '\xBF';
584 *s = '\xBD';
585
586 return 3;
587 }
588
589 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
590 UTF-8 otherwise return 0 */
591 int
592 isfullutf8(char *s, int b) {
593 uchar *c1, *c2, *c3;
594
595 c1 = (uchar *)s;
596 c2 = (uchar *)++s;
597 c3 = (uchar *)++s;
598 if(b < 1) {
599 return 0;
600 } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
601 return 0;
602 } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
603 ((b == 1) ||
604 ((b == 2) && (*c2&(B7|B6)) == B7))) {
605 return 0;
606 } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
607 ((b == 1) ||
608 ((b == 2) && (*c2&(B7|B6)) == B7) ||
609 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
610 return 0;
611 } else {
612 return 1;
613 }
614 }
615
616 int
617 utf8size(char *s) {
618 uchar c = *s;
619
620 if(~c&B7) {
621 return 1;
622 } else if((c&(B7|B6|B5)) == (B7|B6)) {
623 return 2;
624 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
625 return 3;
626 } else {
627 return 4;
628 }
629 }
630
631 void
632 selinit(void) {
633 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
634 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
635 sel.mode = 0;
636 sel.bx = -1;
637 sel.clip = NULL;
638 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
639 if(sel.xtarget == None)
640 sel.xtarget = XA_STRING;
641 }
642
643 static int
644 x2col(int x) {
645 x -= borderpx;
646 x /= xw.cw;
647
648 return LIMIT(x, 0, term.col-1);
649 }
650
651 static int
652 y2row(int y) {
653 y -= borderpx;
654 y /= xw.ch;
655
656 return LIMIT(y, 0, term.row-1);
657 }
658
659 static inline bool
660 selected(int x, int y) {
661 int bx, ex;
662
663 if(sel.ey == y && sel.by == y) {
664 bx = MIN(sel.bx, sel.ex);
665 ex = MAX(sel.bx, sel.ex);
666
667 return BETWEEN(x, bx, ex);
668 }
669
670 if(sel.type == SEL_RECTANGULAR) {
671 return ((sel.b.y <= y && y <= sel.e.y)
672 && (sel.b.x <= x && x <= sel.e.x));
673 }
674 return ((sel.b.y < y && y < sel.e.y)
675 || (y == sel.e.y && x <= sel.e.x))
676 || (y == sel.b.y && x >= sel.b.x
677 && (x <= sel.e.x || sel.b.y != sel.e.y));
678 }
679
680 void
681 selsnap(int mode, int *x, int *y, int direction) {
682 switch(mode) {
683 case SNAP_WORD:
684 for(;;) {
685 if(direction < 0 && *x <= 0) {
686 if(*y > 0 && term.line[*y - 1][term.col-1].mode
687 & ATTR_WRAP) {
688 *y -= 1;
689 *x = term.col-1;
690 } else {
691 break;
692 }
693 }
694 if(direction > 0 && *x >= term.col-1) {
695 if(*y < term.row-1 && term.line[*y][*x].mode
696 & ATTR_WRAP) {
697 *y += 1;
698 *x = 0;
699 } else {
700 break;
701 }
702 }
703
704 if(term.line[*y][*x + direction].c[0] == ' ')
705 break;
706
707 *x += direction;
708 }
709 break;
710 case SNAP_LINE:
711 *x = (direction < 0) ? 0 : term.col - 1;
712 if(direction < 0 && *y > 0) {
713 for(; *y > 0; *y += direction) {
714 if(!(term.line[*y-1][term.col-1].mode
715 & ATTR_WRAP)) {
716 break;
717 }
718 }
719 } else if(direction > 0 && *y < term.row-1) {
720 for(; *y < term.row; *y += direction) {
721 if(!(term.line[*y][term.col-1].mode
722 & ATTR_WRAP)) {
723 break;
724 }
725 }
726 }
727 break;
728 default:
729 break;
730 }
731 }
732
733 void
734 getbuttoninfo(XEvent *e) {
735 int type;
736 uint state = e->xbutton.state &~Button1Mask;
737
738 sel.alt = IS_SET(MODE_ALTSCREEN);
739
740 sel.ex = x2col(e->xbutton.x);
741 sel.ey = y2row(e->xbutton.y);
742
743 if (sel.by < sel.ey
744 || (sel.by == sel.ey && sel.bx < sel.ex)) {
745 selsnap(sel.snap, &sel.bx, &sel.by, -1);
746 selsnap(sel.snap, &sel.ex, &sel.ey, +1);
747 } else {
748 selsnap(sel.snap, &sel.ex, &sel.ey, -1);
749 selsnap(sel.snap, &sel.bx, &sel.by, +1);
750 }
751
752 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
753 sel.b.y = MIN(sel.by, sel.ey);
754 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
755 sel.e.y = MAX(sel.by, sel.ey);
756
757 sel.type = SEL_REGULAR;
758 for(type = 1; type < LEN(selmasks); ++type) {
759 if(match(selmasks[type], state)) {
760 sel.type = type;
761 break;
762 }
763 }
764 }
765
766 void
767 mousereport(XEvent *e) {
768 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
769 button = e->xbutton.button, state = e->xbutton.state,
770 len;
771 char buf[40];
772 static int ob, ox, oy;
773
774 /* from urxvt */
775 if(e->xbutton.type == MotionNotify) {
776 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
777 return;
778 button = ob + 32;
779 ox = x, oy = y;
780 } else if(!IS_SET(MODE_MOUSESGR)
781 && (e->xbutton.type == ButtonRelease
782 || button == AnyButton)) {
783 button = 3;
784 } else {
785 button -= Button1;
786 if(button >= 3)
787 button += 64 - 3;
788 if(e->xbutton.type == ButtonPress) {
789 ob = button;
790 ox = x, oy = y;
791 }
792 }
793
794 button += (state & ShiftMask ? 4 : 0)
795 + (state & Mod4Mask ? 8 : 0)
796 + (state & ControlMask ? 16 : 0);
797
798 len = 0;
799 if(IS_SET(MODE_MOUSESGR)) {
800 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
801 button, x+1, y+1,
802 e->xbutton.type == ButtonRelease ? 'm' : 'M');
803 } else if(x < 223 && y < 223) {
804 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
805 32+button, 32+x+1, 32+y+1);
806 } else {
807 return;
808 }
809
810 ttywrite(buf, len);
811 }
812
813 void
814 bpress(XEvent *e) {
815 struct timeval now;
816 Mousekey *mk;
817
818 if(IS_SET(MODE_MOUSE)) {
819 mousereport(e);
820 return;
821 }
822
823 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
824 if(e->xbutton.button == mk->b
825 && match(mk->mask, e->xbutton.state)) {
826 ttywrite(mk->s, strlen(mk->s));
827 if(IS_SET(MODE_ECHO))
828 techo(mk->s, strlen(mk->s));
829 return;
830 }
831 }
832
833 if(e->xbutton.button == Button1) {
834 gettimeofday(&now, NULL);
835
836 /* Clear previous selection, logically and visually. */
837 if(sel.bx != -1) {
838 sel.bx = -1;
839 tsetdirt(sel.b.y, sel.e.y);
840 draw();
841 }
842 sel.mode = 1;
843 sel.type = SEL_REGULAR;
844 sel.ex = sel.bx = x2col(e->xbutton.x);
845 sel.ey = sel.by = y2row(e->xbutton.y);
846
847 /*
848 * If the user clicks below predefined timeouts specific
849 * snapping behaviour is exposed.
850 */
851 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
852 sel.snap = SNAP_LINE;
853 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
854 sel.snap = SNAP_WORD;
855 } else {
856 sel.snap = 0;
857 }
858 selsnap(sel.snap, &sel.bx, &sel.by, -1);
859 selsnap(sel.snap, &sel.ex, &sel.ey, +1);
860 sel.b.x = sel.bx;
861 sel.b.y = sel.by;
862 sel.e.x = sel.ex;
863 sel.e.y = sel.ey;
864
865 /*
866 * Draw selection, unless it's regular and we don't want to
867 * make clicks visible
868 */
869 if(sel.snap != 0) {
870 sel.mode++;
871 tsetdirt(sel.b.y, sel.e.y);
872 draw();
873 }
874 sel.tclick2 = sel.tclick1;
875 sel.tclick1 = now;
876 }
877 }
878
879 void
880 selcopy(void) {
881 char *str, *ptr;
882 int x, y, bufsize, size;
883 Glyph *gp, *last;
884
885 if(sel.bx == -1) {
886 str = NULL;
887 } else {
888 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
889 ptr = str = xmalloc(bufsize);
890
891 /* append every set & selected glyph to the selection */
892 for(y = sel.b.y; y < sel.e.y + 1; y++) {
893 gp = &term.line[y][0];
894 last = gp + term.col;
895
896 while(--last >= gp && !(selected(last - gp, y) && \
897 strcmp(last->c, " ") != 0))
898 /* nothing */;
899
900 for(x = 0; gp <= last; x++, ++gp) {
901 if(!selected(x, y))
902 continue;
903
904 size = utf8size(gp->c);
905 memcpy(ptr, gp->c, size);
906 ptr += size;
907 }
908
909 /*
910 * Copy and pasting of line endings is inconsistent
911 * in the inconsistent terminal and GUI world.
912 * The best solution seems like to produce '\n' when
913 * something is copied from st and convert '\n' to
914 * '\r', when something to be pasted is received by
915 * st.
916 * FIXME: Fix the computer world.
917 */
918 if(y < sel.e.y && !((gp-1)->mode & ATTR_WRAP))
919 *ptr++ = '\n';
920 }
921 *ptr = 0;
922 }
923 xsetsel(str);
924 }
925
926 void
927 selnotify(XEvent *e) {
928 ulong nitems, ofs, rem;
929 int format;
930 uchar *data, *last, *repl;
931 Atom type;
932
933 ofs = 0;
934 do {
935 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
936 False, AnyPropertyType, &type, &format,
937 &nitems, &rem, &data)) {
938 fprintf(stderr, "Clipboard allocation failed\n");
939 return;
940 }
941
942 /*
943 * As seen in selcopy:
944 * Line endings are inconsistent in the terminal and GUI world
945 * copy and pasting. When receiving some selection data,
946 * replace all '\n' with '\r'.
947 * FIXME: Fix the computer world.
948 */
949 repl = data;
950 last = data + nitems * format / 8;
951 while((repl = memchr(repl, '\n', last - repl))) {
952 *repl++ = '\r';
953 }
954
955 ttywrite((const char *)data, nitems * format / 8);
956 XFree(data);
957 /* number of 32-bit chunks returned */
958 ofs += nitems * format / 32;
959 } while(rem > 0);
960 }
961
962 void
963 selpaste(const Arg *dummy) {
964 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
965 xw.win, CurrentTime);
966 }
967
968 void
969 clippaste(const Arg *dummy) {
970 Atom clipboard;
971
972 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
973 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
974 xw.win, CurrentTime);
975 }
976
977 void
978 selclear(XEvent *e) {
979 if(sel.bx == -1)
980 return;
981 sel.bx = -1;
982 tsetdirt(sel.b.y, sel.e.y);
983 }
984
985 void
986 selrequest(XEvent *e) {
987 XSelectionRequestEvent *xsre;
988 XSelectionEvent xev;
989 Atom xa_targets, string;
990
991 xsre = (XSelectionRequestEvent *) e;
992 xev.type = SelectionNotify;
993 xev.requestor = xsre->requestor;
994 xev.selection = xsre->selection;
995 xev.target = xsre->target;
996 xev.time = xsre->time;
997 /* reject */
998 xev.property = None;
999
1000 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1001 if(xsre->target == xa_targets) {
1002 /* respond with the supported type */
1003 string = sel.xtarget;
1004 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1005 XA_ATOM, 32, PropModeReplace,
1006 (uchar *) &string, 1);
1007 xev.property = xsre->property;
1008 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1009 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1010 xsre->target, 8, PropModeReplace,
1011 (uchar *) sel.clip, strlen(sel.clip));
1012 xev.property = xsre->property;
1013 }
1014
1015 /* all done, send a notification to the listener */
1016 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1017 fprintf(stderr, "Error sending SelectionNotify event\n");
1018 }
1019
1020 void
1021 xsetsel(char *str) {
1022 /* register the selection for both the clipboard and the primary */
1023 Atom clipboard;
1024
1025 free(sel.clip);
1026 sel.clip = str;
1027
1028 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1029
1030 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1031 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1032 }
1033
1034 void
1035 brelease(XEvent *e) {
1036 if(IS_SET(MODE_MOUSE)) {
1037 mousereport(e);
1038 return;
1039 }
1040
1041 if(e->xbutton.button == Button2) {
1042 selpaste(NULL);
1043 } else if(e->xbutton.button == Button1) {
1044 if(sel.mode < 2) {
1045 sel.bx = -1;
1046 } else {
1047 getbuttoninfo(e);
1048 selcopy();
1049 }
1050 sel.mode = 0;
1051 term.dirty[sel.ey] = 1;
1052 }
1053 }
1054
1055 void
1056 bmotion(XEvent *e) {
1057 int oldey, oldex, oldsby, oldsey;
1058
1059 if(IS_SET(MODE_MOUSE)) {
1060 mousereport(e);
1061 return;
1062 }
1063
1064 if(!sel.mode)
1065 return;
1066
1067 sel.mode++;
1068 oldey = sel.ey;
1069 oldex = sel.ex;
1070 oldsby = sel.b.y;
1071 oldsey = sel.e.y;
1072 getbuttoninfo(e);
1073
1074 if(oldey != sel.ey || oldex != sel.ex) {
1075 tsetdirt(MIN(sel.b.y, oldsby), MAX(sel.e.y, oldsey));
1076 }
1077 }
1078
1079 void
1080 die(const char *errstr, ...) {
1081 va_list ap;
1082
1083 va_start(ap, errstr);
1084 vfprintf(stderr, errstr, ap);
1085 va_end(ap);
1086 exit(EXIT_FAILURE);
1087 }
1088
1089 void
1090 execsh(void) {
1091 char **args;
1092 char *envshell = getenv("SHELL");
1093 const struct passwd *pass = getpwuid(getuid());
1094 char buf[sizeof(long) * 8 + 1];
1095
1096 unsetenv("COLUMNS");
1097 unsetenv("LINES");
1098 unsetenv("TERMCAP");
1099
1100 if(pass) {
1101 setenv("LOGNAME", pass->pw_name, 1);
1102 setenv("USER", pass->pw_name, 1);
1103 setenv("SHELL", pass->pw_shell, 0);
1104 setenv("HOME", pass->pw_dir, 0);
1105 }
1106
1107 snprintf(buf, sizeof(buf), "%lu", xw.win);
1108 setenv("WINDOWID", buf, 1);
1109
1110 signal(SIGCHLD, SIG_DFL);
1111 signal(SIGHUP, SIG_DFL);
1112 signal(SIGINT, SIG_DFL);
1113 signal(SIGQUIT, SIG_DFL);
1114 signal(SIGTERM, SIG_DFL);
1115 signal(SIGALRM, SIG_DFL);
1116
1117 DEFAULT(envshell, shell);
1118 setenv("TERM", termname, 1);
1119 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1120 execvp(args[0], args);
1121 exit(EXIT_FAILURE);
1122 }
1123
1124 void
1125 sigchld(int a) {
1126 int stat = 0;
1127
1128 if(waitpid(pid, &stat, 0) < 0)
1129 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1130
1131 if(WIFEXITED(stat)) {
1132 exit(WEXITSTATUS(stat));
1133 } else {
1134 exit(EXIT_FAILURE);
1135 }
1136 }
1137
1138 void
1139 ttynew(void) {
1140 int m, s;
1141 struct winsize w = {term.row, term.col, 0, 0};
1142
1143 /* seems to work fine on linux, openbsd and freebsd */
1144 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1145 die("openpty failed: %s\n", SERRNO);
1146
1147 switch(pid = fork()) {
1148 case -1:
1149 die("fork failed\n");
1150 break;
1151 case 0:
1152 setsid(); /* create a new process group */
1153 dup2(s, STDIN_FILENO);
1154 dup2(s, STDOUT_FILENO);
1155 dup2(s, STDERR_FILENO);
1156 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1157 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1158 close(s);
1159 close(m);
1160 execsh();
1161 break;
1162 default:
1163 close(s);
1164 cmdfd = m;
1165 signal(SIGCHLD, sigchld);
1166 if(opt_io) {
1167 iofd = (!strcmp(opt_io, "-")) ?
1168 STDOUT_FILENO :
1169 open(opt_io, O_WRONLY | O_CREAT, 0666);
1170 if(iofd < 0) {
1171 fprintf(stderr, "Error opening %s:%s\n",
1172 opt_io, strerror(errno));
1173 }
1174 }
1175 }
1176 }
1177
1178 void
1179 dump(char c) {
1180 static int col;
1181
1182 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1183 if(++col % 10 == 0)
1184 fprintf(stderr, "\n");
1185 }
1186
1187 void
1188 ttyread(void) {
1189 static char buf[BUFSIZ];
1190 static int buflen = 0;
1191 char *ptr;
1192 char s[UTF_SIZ];
1193 int charsize; /* size of utf8 char in bytes */
1194 long utf8c;
1195 int ret;
1196
1197 /* append read bytes to unprocessed bytes */
1198 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1199 die("Couldn't read from shell: %s\n", SERRNO);
1200
1201 /* process every complete utf8 char */
1202 buflen += ret;
1203 ptr = buf;
1204 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1205 charsize = utf8decode(ptr, &utf8c);
1206 utf8encode(&utf8c, s);
1207 tputc(s, charsize);
1208 ptr += charsize;
1209 buflen -= charsize;
1210 }
1211
1212 /* keep any uncomplete utf8 char for the next call */
1213 memmove(buf, ptr, buflen);
1214 }
1215
1216 void
1217 ttywrite(const char *s, size_t n) {
1218 if(write(cmdfd, s, n) == -1)
1219 die("write error on tty: %s\n", SERRNO);
1220 }
1221
1222 void
1223 ttyresize(void) {
1224 struct winsize w;
1225
1226 w.ws_row = term.row;
1227 w.ws_col = term.col;
1228 w.ws_xpixel = xw.tw;
1229 w.ws_ypixel = xw.th;
1230 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1231 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1232 }
1233
1234 int
1235 tattrset(int attr) {
1236 int i, j;
1237
1238 for(i = 0; i < term.row-1; i++) {
1239 for(j = 0; j < term.col-1; j++) {
1240 if(term.line[i][j].mode & attr)
1241 return 1;
1242 }
1243 }
1244
1245 return 0;
1246 }
1247
1248 void
1249 tsetdirt(int top, int bot) {
1250 int i;
1251
1252 LIMIT(top, 0, term.row-1);
1253 LIMIT(bot, 0, term.row-1);
1254
1255 for(i = top; i <= bot; i++)
1256 term.dirty[i] = 1;
1257 }
1258
1259 void
1260 tsetdirtattr(int attr) {
1261 int i, j;
1262
1263 for(i = 0; i < term.row-1; i++) {
1264 for(j = 0; j < term.col-1; j++) {
1265 if(term.line[i][j].mode & attr) {
1266 tsetdirt(i, i);
1267 break;
1268 }
1269 }
1270 }
1271 }
1272
1273 void
1274 tfulldirt(void) {
1275 tsetdirt(0, term.row-1);
1276 }
1277
1278 void
1279 tcursor(int mode) {
1280 static TCursor c;
1281
1282 if(mode == CURSOR_SAVE) {
1283 c = term.c;
1284 } else if(mode == CURSOR_LOAD) {
1285 term.c = c;
1286 tmoveto(c.x, c.y);
1287 }
1288 }
1289
1290 void
1291 treset(void) {
1292 uint i;
1293
1294 term.c = (TCursor){{
1295 .mode = ATTR_NULL,
1296 .fg = defaultfg,
1297 .bg = defaultbg
1298 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1299
1300 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1301 for(i = tabspaces; i < term.col; i += tabspaces)
1302 term.tabs[i] = 1;
1303 term.top = 0;
1304 term.bot = term.row - 1;
1305 term.mode = MODE_WRAP;
1306
1307 tclearregion(0, 0, term.col-1, term.row-1);
1308 tmoveto(0, 0);
1309 tcursor(CURSOR_SAVE);
1310 }
1311
1312 void
1313 tnew(int col, int row) {
1314 memset(&term, 0, sizeof(Term));
1315 tresize(col, row);
1316 term.numlock = 1;
1317
1318 treset();
1319 }
1320
1321 void
1322 tswapscreen(void) {
1323 Line *tmp = term.line;
1324
1325 term.line = term.alt;
1326 term.alt = tmp;
1327 term.mode ^= MODE_ALTSCREEN;
1328 tfulldirt();
1329 }
1330
1331 void
1332 tscrolldown(int orig, int n) {
1333 int i;
1334 Line temp;
1335
1336 LIMIT(n, 0, term.bot-orig+1);
1337
1338 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1339
1340 for(i = term.bot; i >= orig+n; i--) {
1341 temp = term.line[i];
1342 term.line[i] = term.line[i-n];
1343 term.line[i-n] = temp;
1344
1345 term.dirty[i] = 1;
1346 term.dirty[i-n] = 1;
1347 }
1348
1349 selscroll(orig, n);
1350 }
1351
1352 void
1353 tscrollup(int orig, int n) {
1354 int i;
1355 Line temp;
1356 LIMIT(n, 0, term.bot-orig+1);
1357
1358 tclearregion(0, orig, term.col-1, orig+n-1);
1359
1360 for(i = orig; i <= term.bot-n; i++) {
1361 temp = term.line[i];
1362 term.line[i] = term.line[i+n];
1363 term.line[i+n] = temp;
1364
1365 term.dirty[i] = 1;
1366 term.dirty[i+n] = 1;
1367 }
1368
1369 selscroll(orig, -n);
1370 }
1371
1372 void
1373 selscroll(int orig, int n) {
1374 if(sel.bx == -1)
1375 return;
1376
1377 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1378 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1379 sel.bx = -1;
1380 return;
1381 }
1382 if(sel.type == SEL_RECTANGULAR) {
1383 if(sel.by < term.top)
1384 sel.by = term.top;
1385 if(sel.ey > term.bot)
1386 sel.ey = term.bot;
1387 } else {
1388 if(sel.by < term.top) {
1389 sel.by = term.top;
1390 sel.bx = 0;
1391 }
1392 if(sel.ey > term.bot) {
1393 sel.ey = term.bot;
1394 sel.ex = term.col;
1395 }
1396 }
1397 sel.b.y = sel.by, sel.b.x = sel.bx;
1398 sel.e.y = sel.ey, sel.e.x = sel.ex;
1399 }
1400 }
1401
1402 void
1403 tnewline(int first_col) {
1404 int y = term.c.y;
1405
1406 if(y == term.bot) {
1407 tscrollup(term.top, 1);
1408 } else {
1409 y++;
1410 }
1411 tmoveto(first_col ? 0 : term.c.x, y);
1412 }
1413
1414 void
1415 csiparse(void) {
1416 char *p = csiescseq.buf, *np;
1417 long int v;
1418
1419 csiescseq.narg = 0;
1420 if(*p == '?') {
1421 csiescseq.priv = 1;
1422 p++;
1423 }
1424
1425 csiescseq.buf[csiescseq.len] = '\0';
1426 while(p < csiescseq.buf+csiescseq.len) {
1427 np = NULL;
1428 v = strtol(p, &np, 10);
1429 if(np == p)
1430 v = 0;
1431 if(v == LONG_MAX || v == LONG_MIN)
1432 v = -1;
1433 csiescseq.arg[csiescseq.narg++] = v;
1434 p = np;
1435 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1436 break;
1437 p++;
1438 }
1439 csiescseq.mode = *p;
1440 }
1441
1442 /* for absolute user moves, when decom is set */
1443 void
1444 tmoveato(int x, int y) {
1445 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1446 }
1447
1448 void
1449 tmoveto(int x, int y) {
1450 int miny, maxy;
1451
1452 if(term.c.state & CURSOR_ORIGIN) {
1453 miny = term.top;
1454 maxy = term.bot;
1455 } else {
1456 miny = 0;
1457 maxy = term.row - 1;
1458 }
1459 LIMIT(x, 0, term.col-1);
1460 LIMIT(y, miny, maxy);
1461 term.c.state &= ~CURSOR_WRAPNEXT;
1462 term.c.x = x;
1463 term.c.y = y;
1464 }
1465
1466 void
1467 tsetchar(char *c, Glyph *attr, int x, int y) {
1468 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1469 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1470 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1471 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1472 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1473 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1474 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1475 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1476 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1477 };
1478
1479 /*
1480 * The table is proudly stolen from rxvt.
1481 */
1482 if(attr->mode & ATTR_GFX) {
1483 if(c[0] >= 0x41 && c[0] <= 0x7e
1484 && vt100_0[c[0] - 0x41]) {
1485 c = vt100_0[c[0] - 0x41];
1486 }
1487 }
1488
1489 term.dirty[y] = 1;
1490 term.line[y][x] = *attr;
1491 memcpy(term.line[y][x].c, c, UTF_SIZ);
1492 }
1493
1494 void
1495 tclearregion(int x1, int y1, int x2, int y2) {
1496 int x, y, temp;
1497
1498 if(x1 > x2)
1499 temp = x1, x1 = x2, x2 = temp;
1500 if(y1 > y2)
1501 temp = y1, y1 = y2, y2 = temp;
1502
1503 LIMIT(x1, 0, term.col-1);
1504 LIMIT(x2, 0, term.col-1);
1505 LIMIT(y1, 0, term.row-1);
1506 LIMIT(y2, 0, term.row-1);
1507
1508 for(y = y1; y <= y2; y++) {
1509 term.dirty[y] = 1;
1510 for(x = x1; x <= x2; x++) {
1511 if(selected(x, y))
1512 selclear(NULL);
1513 term.line[y][x] = term.c.attr;
1514 memcpy(term.line[y][x].c, " ", 2);
1515 }
1516 }
1517 }
1518
1519 void
1520 tdeletechar(int n) {
1521 int src = term.c.x + n;
1522 int dst = term.c.x;
1523 int size = term.col - src;
1524
1525 term.dirty[term.c.y] = 1;
1526
1527 if(src >= term.col) {
1528 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1529 return;
1530 }
1531
1532 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1533 size * sizeof(Glyph));
1534 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1535 }
1536
1537 void
1538 tinsertblank(int n) {
1539 int src = term.c.x;
1540 int dst = src + n;
1541 int size = term.col - dst;
1542
1543 term.dirty[term.c.y] = 1;
1544
1545 if(dst >= term.col) {
1546 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1547 return;
1548 }
1549
1550 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1551 size * sizeof(Glyph));
1552 tclearregion(src, term.c.y, dst - 1, term.c.y);
1553 }
1554
1555 void
1556 tinsertblankline(int n) {
1557 if(term.c.y < term.top || term.c.y > term.bot)
1558 return;
1559
1560 tscrolldown(term.c.y, n);
1561 }
1562
1563 void
1564 tdeleteline(int n) {
1565 if(term.c.y < term.top || term.c.y > term.bot)
1566 return;
1567
1568 tscrollup(term.c.y, n);
1569 }
1570
1571 void
1572 tsetattr(int *attr, int l) {
1573 int i;
1574
1575 for(i = 0; i < l; i++) {
1576 switch(attr[i]) {
1577 case 0:
1578 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1579 | ATTR_BOLD | ATTR_ITALIC \
1580 | ATTR_BLINK);
1581 term.c.attr.fg = defaultfg;
1582 term.c.attr.bg = defaultbg;
1583 break;
1584 case 1:
1585 term.c.attr.mode |= ATTR_BOLD;
1586 break;
1587 case 3:
1588 term.c.attr.mode |= ATTR_ITALIC;
1589 break;
1590 case 4:
1591 term.c.attr.mode |= ATTR_UNDERLINE;
1592 break;
1593 case 5: /* slow blink */
1594 case 6: /* rapid blink */
1595 term.c.attr.mode |= ATTR_BLINK;
1596 break;
1597 case 7:
1598 term.c.attr.mode |= ATTR_REVERSE;
1599 break;
1600 case 21:
1601 case 22:
1602 term.c.attr.mode &= ~ATTR_BOLD;
1603 break;
1604 case 23:
1605 term.c.attr.mode &= ~ATTR_ITALIC;
1606 break;
1607 case 24:
1608 term.c.attr.mode &= ~ATTR_UNDERLINE;
1609 break;
1610 case 25:
1611 case 26:
1612 term.c.attr.mode &= ~ATTR_BLINK;
1613 break;
1614 case 27:
1615 term.c.attr.mode &= ~ATTR_REVERSE;
1616 break;
1617 case 38:
1618 if(i + 2 < l && attr[i + 1] == 5) {
1619 i += 2;
1620 if(BETWEEN(attr[i], 0, 255)) {
1621 term.c.attr.fg = attr[i];
1622 } else {
1623 fprintf(stderr,
1624 "erresc: bad fgcolor %d\n",
1625 attr[i]);
1626 }
1627 } else {
1628 fprintf(stderr,
1629 "erresc(38): gfx attr %d unknown\n",
1630 attr[i]);
1631 }
1632 break;
1633 case 39:
1634 term.c.attr.fg = defaultfg;
1635 break;
1636 case 48:
1637 if(i + 2 < l && attr[i + 1] == 5) {
1638 i += 2;
1639 if(BETWEEN(attr[i], 0, 255)) {
1640 term.c.attr.bg = attr[i];
1641 } else {
1642 fprintf(stderr,
1643 "erresc: bad bgcolor %d\n",
1644 attr[i]);
1645 }
1646 } else {
1647 fprintf(stderr,
1648 "erresc(48): gfx attr %d unknown\n",
1649 attr[i]);
1650 }
1651 break;
1652 case 49:
1653 term.c.attr.bg = defaultbg;
1654 break;
1655 default:
1656 if(BETWEEN(attr[i], 30, 37)) {
1657 term.c.attr.fg = attr[i] - 30;
1658 } else if(BETWEEN(attr[i], 40, 47)) {
1659 term.c.attr.bg = attr[i] - 40;
1660 } else if(BETWEEN(attr[i], 90, 97)) {
1661 term.c.attr.fg = attr[i] - 90 + 8;
1662 } else if(BETWEEN(attr[i], 100, 107)) {
1663 term.c.attr.bg = attr[i] - 100 + 8;
1664 } else {
1665 fprintf(stderr,
1666 "erresc(default): gfx attr %d unknown\n",
1667 attr[i]), csidump();
1668 }
1669 break;
1670 }
1671 }
1672 }
1673
1674 void
1675 tsetscroll(int t, int b) {
1676 int temp;
1677
1678 LIMIT(t, 0, term.row-1);
1679 LIMIT(b, 0, term.row-1);
1680 if(t > b) {
1681 temp = t;
1682 t = b;
1683 b = temp;
1684 }
1685 term.top = t;
1686 term.bot = b;
1687 }
1688
1689 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1690
1691 void
1692 tsetmode(bool priv, bool set, int *args, int narg) {
1693 int *lim, mode;
1694 bool alt;
1695
1696 for(lim = args + narg; args < lim; ++args) {
1697 if(priv) {
1698 switch(*args) {
1699 break;
1700 case 1: /* DECCKM -- Cursor key */
1701 MODBIT(term.mode, set, MODE_APPCURSOR);
1702 break;
1703 case 5: /* DECSCNM -- Reverse video */
1704 mode = term.mode;
1705 MODBIT(term.mode, set, MODE_REVERSE);
1706 if(mode != term.mode)
1707 redraw(REDRAW_TIMEOUT);
1708 break;
1709 case 6: /* DECOM -- Origin */
1710 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1711 tmoveato(0, 0);
1712 break;
1713 case 7: /* DECAWM -- Auto wrap */
1714 MODBIT(term.mode, set, MODE_WRAP);
1715 break;
1716 case 0: /* Error (IGNORED) */
1717 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1718 case 3: /* DECCOLM -- Column (IGNORED) */
1719 case 4: /* DECSCLM -- Scroll (IGNORED) */
1720 case 8: /* DECARM -- Auto repeat (IGNORED) */
1721 case 18: /* DECPFF -- Printer feed (IGNORED) */
1722 case 19: /* DECPEX -- Printer extent (IGNORED) */
1723 case 42: /* DECNRCM -- National characters (IGNORED) */
1724 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1725 break;
1726 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1727 MODBIT(term.mode, !set, MODE_HIDE);
1728 break;
1729 case 1000: /* 1000,1002: enable xterm mouse report */
1730 MODBIT(term.mode, set, MODE_MOUSEBTN);
1731 MODBIT(term.mode, 0, MODE_MOUSEMOTION);
1732 break;
1733 case 1002:
1734 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1735 MODBIT(term.mode, 0, MODE_MOUSEBTN);
1736 break;
1737 case 1006:
1738 MODBIT(term.mode, set, MODE_MOUSESGR);
1739 break;
1740 case 1034:
1741 MODBIT(term.mode, set, MODE_8BIT);
1742 break;
1743 case 1049: /* = 1047 and 1048 */
1744 case 47:
1745 case 1047:
1746 if (!allowaltscreen)
1747 break;
1748
1749 alt = IS_SET(MODE_ALTSCREEN);
1750 if(alt) {
1751 tclearregion(0, 0, term.col-1,
1752 term.row-1);
1753 }
1754 if(set ^ alt) /* set is always 1 or 0 */
1755 tswapscreen();
1756 if(*args != 1049)
1757 break;
1758 /* FALLTRU */
1759 case 1048:
1760 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1761 break;
1762 default:
1763 fprintf(stderr,
1764 "erresc: unknown private set/reset mode %d\n",
1765 *args);
1766 break;
1767 }
1768 } else {
1769 switch(*args) {
1770 case 0: /* Error (IGNORED) */
1771 break;
1772 case 2: /* KAM -- keyboard action */
1773 MODBIT(term.mode, set, MODE_KBDLOCK);
1774 break;
1775 case 4: /* IRM -- Insertion-replacement */
1776 MODBIT(term.mode, set, MODE_INSERT);
1777 break;
1778 case 12: /* SRM -- Send/Receive */
1779 MODBIT(term.mode, !set, MODE_ECHO);
1780 break;
1781 case 20: /* LNM -- Linefeed/new line */
1782 MODBIT(term.mode, set, MODE_CRLF);
1783 break;
1784 default:
1785 fprintf(stderr,
1786 "erresc: unknown set/reset mode %d\n",
1787 *args);
1788 break;
1789 }
1790 }
1791 }
1792 }
1793 #undef MODBIT
1794
1795
1796 void
1797 csihandle(void) {
1798 switch(csiescseq.mode) {
1799 default:
1800 unknown:
1801 fprintf(stderr, "erresc: unknown csi ");
1802 csidump();
1803 /* die(""); */
1804 break;
1805 case '@': /* ICH -- Insert <n> blank char */
1806 DEFAULT(csiescseq.arg[0], 1);
1807 tinsertblank(csiescseq.arg[0]);
1808 break;
1809 case 'A': /* CUU -- Cursor <n> Up */
1810 DEFAULT(csiescseq.arg[0], 1);
1811 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1812 break;
1813 case 'B': /* CUD -- Cursor <n> Down */
1814 case 'e': /* VPR --Cursor <n> Down */
1815 DEFAULT(csiescseq.arg[0], 1);
1816 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1817 break;
1818 case 'c': /* DA -- Device Attributes */
1819 if(csiescseq.arg[0] == 0)
1820 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1821 break;
1822 case 'C': /* CUF -- Cursor <n> Forward */
1823 case 'a': /* HPR -- Cursor <n> Forward */
1824 DEFAULT(csiescseq.arg[0], 1);
1825 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1826 break;
1827 case 'D': /* CUB -- Cursor <n> Backward */
1828 DEFAULT(csiescseq.arg[0], 1);
1829 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1830 break;
1831 case 'E': /* CNL -- Cursor <n> Down and first col */
1832 DEFAULT(csiescseq.arg[0], 1);
1833 tmoveto(0, term.c.y+csiescseq.arg[0]);
1834 break;
1835 case 'F': /* CPL -- Cursor <n> Up and first col */
1836 DEFAULT(csiescseq.arg[0], 1);
1837 tmoveto(0, term.c.y-csiescseq.arg[0]);
1838 break;
1839 case 'g': /* TBC -- Tabulation clear */
1840 switch(csiescseq.arg[0]) {
1841 case 0: /* clear current tab stop */
1842 term.tabs[term.c.x] = 0;
1843 break;
1844 case 3: /* clear all the tabs */
1845 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1846 break;
1847 default:
1848 goto unknown;
1849 }
1850 break;
1851 case 'G': /* CHA -- Move to <col> */
1852 case '`': /* HPA */
1853 DEFAULT(csiescseq.arg[0], 1);
1854 tmoveto(csiescseq.arg[0]-1, term.c.y);
1855 break;
1856 case 'H': /* CUP -- Move to <row> <col> */
1857 case 'f': /* HVP */
1858 DEFAULT(csiescseq.arg[0], 1);
1859 DEFAULT(csiescseq.arg[1], 1);
1860 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1861 break;
1862 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1863 DEFAULT(csiescseq.arg[0], 1);
1864 while(csiescseq.arg[0]--)
1865 tputtab(1);
1866 break;
1867 case 'J': /* ED -- Clear screen */
1868 sel.bx = -1;
1869 switch(csiescseq.arg[0]) {
1870 case 0: /* below */
1871 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1872 if(term.c.y < term.row-1) {
1873 tclearregion(0, term.c.y+1, term.col-1,
1874 term.row-1);
1875 }
1876 break;
1877 case 1: /* above */
1878 if(term.c.y > 1)
1879 tclearregion(0, 0, term.col-1, term.c.y-1);
1880 tclearregion(0, term.c.y, term.c.x, term.c.y);
1881 break;
1882 case 2: /* all */
1883 tclearregion(0, 0, term.col-1, term.row-1);
1884 break;
1885 default:
1886 goto unknown;
1887 }
1888 break;
1889 case 'K': /* EL -- Clear line */
1890 switch(csiescseq.arg[0]) {
1891 case 0: /* right */
1892 tclearregion(term.c.x, term.c.y, term.col-1,
1893 term.c.y);
1894 break;
1895 case 1: /* left */
1896 tclearregion(0, term.c.y, term.c.x, term.c.y);
1897 break;
1898 case 2: /* all */
1899 tclearregion(0, term.c.y, term.col-1, term.c.y);
1900 break;
1901 }
1902 break;
1903 case 'S': /* SU -- Scroll <n> line up */
1904 DEFAULT(csiescseq.arg[0], 1);
1905 tscrollup(term.top, csiescseq.arg[0]);
1906 break;
1907 case 'T': /* SD -- Scroll <n> line down */
1908 DEFAULT(csiescseq.arg[0], 1);
1909 tscrolldown(term.top, csiescseq.arg[0]);
1910 break;
1911 case 'L': /* IL -- Insert <n> blank lines */
1912 DEFAULT(csiescseq.arg[0], 1);
1913 tinsertblankline(csiescseq.arg[0]);
1914 break;
1915 case 'l': /* RM -- Reset Mode */
1916 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1917 break;
1918 case 'M': /* DL -- Delete <n> lines */
1919 DEFAULT(csiescseq.arg[0], 1);
1920 tdeleteline(csiescseq.arg[0]);
1921 break;
1922 case 'X': /* ECH -- Erase <n> char */
1923 DEFAULT(csiescseq.arg[0], 1);
1924 tclearregion(term.c.x, term.c.y,
1925 term.c.x + csiescseq.arg[0] - 1, term.c.y);
1926 break;
1927 case 'P': /* DCH -- Delete <n> char */
1928 DEFAULT(csiescseq.arg[0], 1);
1929 tdeletechar(csiescseq.arg[0]);
1930 break;
1931 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1932 DEFAULT(csiescseq.arg[0], 1);
1933 while(csiescseq.arg[0]--)
1934 tputtab(0);
1935 break;
1936 case 'd': /* VPA -- Move to <row> */
1937 DEFAULT(csiescseq.arg[0], 1);
1938 tmoveato(term.c.x, csiescseq.arg[0]-1);
1939 break;
1940 case 'h': /* SM -- Set terminal mode */
1941 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1942 break;
1943 case 'm': /* SGR -- Terminal attribute (color) */
1944 tsetattr(csiescseq.arg, csiescseq.narg);
1945 break;
1946 case 'r': /* DECSTBM -- Set Scrolling Region */
1947 if(csiescseq.priv) {
1948 goto unknown;
1949 } else {
1950 DEFAULT(csiescseq.arg[0], 1);
1951 DEFAULT(csiescseq.arg[1], term.row);
1952 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1953 tmoveato(0, 0);
1954 }
1955 break;
1956 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1957 tcursor(CURSOR_SAVE);
1958 break;
1959 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1960 tcursor(CURSOR_LOAD);
1961 break;
1962 }
1963 }
1964
1965 void
1966 csidump(void) {
1967 int i;
1968 uint c;
1969
1970 printf("ESC[");
1971 for(i = 0; i < csiescseq.len; i++) {
1972 c = csiescseq.buf[i] & 0xff;
1973 if(isprint(c)) {
1974 putchar(c);
1975 } else if(c == '\n') {
1976 printf("(\\n)");
1977 } else if(c == '\r') {
1978 printf("(\\r)");
1979 } else if(c == 0x1b) {
1980 printf("(\\e)");
1981 } else {
1982 printf("(%02x)", c);
1983 }
1984 }
1985 putchar('\n');
1986 }
1987
1988 void
1989 csireset(void) {
1990 memset(&csiescseq, 0, sizeof(csiescseq));
1991 }
1992
1993 void
1994 strhandle(void) {
1995 char *p = NULL;
1996 int i, j, narg;
1997
1998 strparse();
1999 narg = strescseq.narg;
2000
2001 switch(strescseq.type) {
2002 case ']': /* OSC -- Operating System Command */
2003 switch(i = atoi(strescseq.args[0])) {
2004 case 0:
2005 case 1:
2006 case 2:
2007 if(narg > 1)
2008 xsettitle(strescseq.args[1]);
2009 break;
2010 case 4: /* color set */
2011 if(narg < 3)
2012 break;
2013 p = strescseq.args[2];
2014 /* fall through */
2015 case 104: /* color reset, here p = NULL */
2016 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2017 if (!xsetcolorname(j, p)) {
2018 fprintf(stderr, "erresc: invalid color %s\n", p);
2019 } else {
2020 /*
2021 * TODO if defaultbg color is changed, borders
2022 * are dirty
2023 */
2024 redraw(0);
2025 }
2026 break;
2027 default:
2028 fprintf(stderr, "erresc: unknown str ");
2029 strdump();
2030 break;
2031 }
2032 break;
2033 case 'k': /* old title set compatibility */
2034 xsettitle(strescseq.args[0]);
2035 break;
2036 case 'P': /* DSC -- Device Control String */
2037 case '_': /* APC -- Application Program Command */
2038 case '^': /* PM -- Privacy Message */
2039 default:
2040 fprintf(stderr, "erresc: unknown str ");
2041 strdump();
2042 /* die(""); */
2043 break;
2044 }
2045 }
2046
2047 void
2048 strparse(void) {
2049 char *p = strescseq.buf;
2050
2051 strescseq.narg = 0;
2052 strescseq.buf[strescseq.len] = '\0';
2053 while(p && strescseq.narg < STR_ARG_SIZ)
2054 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2055 }
2056
2057 void
2058 strdump(void) {
2059 int i;
2060 uint c;
2061
2062 printf("ESC%c", strescseq.type);
2063 for(i = 0; i < strescseq.len; i++) {
2064 c = strescseq.buf[i] & 0xff;
2065 if(c == '\0') {
2066 return;
2067 } else if(isprint(c)) {
2068 putchar(c);
2069 } else if(c == '\n') {
2070 printf("(\\n)");
2071 } else if(c == '\r') {
2072 printf("(\\r)");
2073 } else if(c == 0x1b) {
2074 printf("(\\e)");
2075 } else {
2076 printf("(%02x)", c);
2077 }
2078 }
2079 printf("ESC\\\n");
2080 }
2081
2082 void
2083 strreset(void) {
2084 memset(&strescseq, 0, sizeof(strescseq));
2085 }
2086
2087 void
2088 tputtab(bool forward) {
2089 uint x = term.c.x;
2090
2091 if(forward) {
2092 if(x == term.col)
2093 return;
2094 for(++x; x < term.col && !term.tabs[x]; ++x)
2095 /* nothing */ ;
2096 } else {
2097 if(x == 0)
2098 return;
2099 for(--x; x > 0 && !term.tabs[x]; --x)
2100 /* nothing */ ;
2101 }
2102 tmoveto(x, term.c.y);
2103 }
2104
2105 void
2106 techo(char *buf, int len) {
2107 for(; len > 0; buf++, len--) {
2108 char c = *buf;
2109
2110 if(c == '\033') { /* escape */
2111 tputc("^", 1);
2112 tputc("[", 1);
2113 } else if(c < '\x20') { /* control code */
2114 if(c != '\n' && c != '\r' && c != '\t') {
2115 c |= '\x40';
2116 tputc("^", 1);
2117 }
2118 tputc(&c, 1);
2119 } else {
2120 break;
2121 }
2122 }
2123 if(len)
2124 tputc(buf, len);
2125 }
2126
2127 void
2128 tputc(char *c, int len) {
2129 uchar ascii = *c;
2130 bool control = ascii < '\x20' || ascii == 0177;
2131
2132 if(iofd != -1) {
2133 if(xwrite(iofd, c, len) < 0) {
2134 fprintf(stderr, "Error writing in %s:%s\n",
2135 opt_io, strerror(errno));
2136 close(iofd);
2137 iofd = -1;
2138 }
2139 }
2140
2141 /*
2142 * STR sequences must be checked before anything else
2143 * because it can use some control codes as part of the sequence.
2144 */
2145 if(term.esc & ESC_STR) {
2146 switch(ascii) {
2147 case '\033':
2148 term.esc = ESC_START | ESC_STR_END;
2149 break;
2150 case '\a': /* backwards compatibility to xterm */
2151 term.esc = 0;
2152 strhandle();
2153 break;
2154 default:
2155 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2156 memmove(&strescseq.buf[strescseq.len], c, len);
2157 strescseq.len += len;
2158 } else {
2159 /*
2160 * Here is a bug in terminals. If the user never sends
2161 * some code to stop the str or esc command, then st
2162 * will stop responding. But this is better than
2163 * silently failing with unknown characters. At least
2164 * then users will report back.
2165 *
2166 * In the case users ever get fixed, here is the code:
2167 */
2168 /*
2169 * term.esc = 0;
2170 * strhandle();
2171 */
2172 }
2173 }
2174 return;
2175 }
2176
2177 /*
2178 * Actions of control codes must be performed as soon they arrive
2179 * because they can be embedded inside a control sequence, and
2180 * they must not cause conflicts with sequences.
2181 */
2182 if(control) {
2183 switch(ascii) {
2184 case '\t': /* HT */
2185 tputtab(1);
2186 return;
2187 case '\b': /* BS */
2188 tmoveto(term.c.x-1, term.c.y);
2189 return;
2190 case '\r': /* CR */
2191 tmoveto(0, term.c.y);
2192 return;
2193 case '\f': /* LF */
2194 case '\v': /* VT */
2195 case '\n': /* LF */
2196 /* go to first col if the mode is set */
2197 tnewline(IS_SET(MODE_CRLF));
2198 return;
2199 case '\a': /* BEL */
2200 if(!(xw.state & WIN_FOCUSED))
2201 xseturgency(1);
2202 return;
2203 case '\033': /* ESC */
2204 csireset();
2205 term.esc = ESC_START;
2206 return;
2207 case '\016': /* SO */
2208 case '\017': /* SI */
2209 /*
2210 * Different charsets are hard to handle. Applications
2211 * should use the right alt charset escapes for the
2212 * only reason they still exist: line drawing. The
2213 * rest is incompatible history st should not support.
2214 */
2215 return;
2216 case '\032': /* SUB */
2217 case '\030': /* CAN */
2218 csireset();
2219 return;
2220 case '\005': /* ENQ (IGNORED) */
2221 case '\000': /* NUL (IGNORED) */
2222 case '\021': /* XON (IGNORED) */
2223 case '\023': /* XOFF (IGNORED) */
2224 case 0177: /* DEL (IGNORED) */
2225 return;
2226 }
2227 } else if(term.esc & ESC_START) {
2228 if(term.esc & ESC_CSI) {
2229 csiescseq.buf[csiescseq.len++] = ascii;
2230 if(BETWEEN(ascii, 0x40, 0x7E)
2231 || csiescseq.len >= \
2232 sizeof(csiescseq.buf)-1) {
2233 term.esc = 0;
2234 csiparse();
2235 csihandle();
2236 }
2237 } else if(term.esc & ESC_STR_END) {
2238 term.esc = 0;
2239 if(ascii == '\\')
2240 strhandle();
2241 } else if(term.esc & ESC_ALTCHARSET) {
2242 switch(ascii) {
2243 case '0': /* Line drawing set */
2244 term.c.attr.mode |= ATTR_GFX;
2245 break;
2246 case 'B': /* USASCII */
2247 term.c.attr.mode &= ~ATTR_GFX;
2248 break;
2249 case 'A': /* UK (IGNORED) */
2250 case '<': /* multinational charset (IGNORED) */
2251 case '5': /* Finnish (IGNORED) */
2252 case 'C': /* Finnish (IGNORED) */
2253 case 'K': /* German (IGNORED) */
2254 break;
2255 default:
2256 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2257 }
2258 term.esc = 0;
2259 } else if(term.esc & ESC_TEST) {
2260 if(ascii == '8') { /* DEC screen alignment test. */
2261 char E[UTF_SIZ] = "E";
2262 int x, y;
2263
2264 for(x = 0; x < term.col; ++x) {
2265 for(y = 0; y < term.row; ++y)
2266 tsetchar(E, &term.c.attr, x, y);
2267 }
2268 }
2269 term.esc = 0;
2270 } else {
2271 switch(ascii) {
2272 case '[':
2273 term.esc |= ESC_CSI;
2274 break;
2275 case '#':
2276 term.esc |= ESC_TEST;
2277 break;
2278 case 'P': /* DCS -- Device Control String */
2279 case '_': /* APC -- Application Program Command */
2280 case '^': /* PM -- Privacy Message */
2281 case ']': /* OSC -- Operating System Command */
2282 case 'k': /* old title set compatibility */
2283 strreset();
2284 strescseq.type = ascii;
2285 term.esc |= ESC_STR;
2286 break;
2287 case '(': /* set primary charset G0 */
2288 term.esc |= ESC_ALTCHARSET;
2289 break;
2290 case ')': /* set secondary charset G1 (IGNORED) */
2291 case '*': /* set tertiary charset G2 (IGNORED) */
2292 case '+': /* set quaternary charset G3 (IGNORED) */
2293 term.esc = 0;
2294 break;
2295 case 'D': /* IND -- Linefeed */
2296 if(term.c.y == term.bot) {
2297 tscrollup(term.top, 1);
2298 } else {
2299 tmoveto(term.c.x, term.c.y+1);
2300 }
2301 term.esc = 0;
2302 break;
2303 case 'E': /* NEL -- Next line */
2304 tnewline(1); /* always go to first col */
2305 term.esc = 0;
2306 break;
2307 case 'H': /* HTS -- Horizontal tab stop */
2308 term.tabs[term.c.x] = 1;
2309 term.esc = 0;
2310 break;
2311 case 'M': /* RI -- Reverse index */
2312 if(term.c.y == term.top) {
2313 tscrolldown(term.top, 1);
2314 } else {
2315 tmoveto(term.c.x, term.c.y-1);
2316 }
2317 term.esc = 0;
2318 break;
2319 case 'Z': /* DECID -- Identify Terminal */
2320 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2321 term.esc = 0;
2322 break;
2323 case 'c': /* RIS -- Reset to inital state */
2324 treset();
2325 term.esc = 0;
2326 xresettitle();
2327 break;
2328 case '=': /* DECPAM -- Application keypad */
2329 term.mode |= MODE_APPKEYPAD;
2330 term.esc = 0;
2331 break;
2332 case '>': /* DECPNM -- Normal keypad */
2333 term.mode &= ~MODE_APPKEYPAD;
2334 term.esc = 0;
2335 break;
2336 case '7': /* DECSC -- Save Cursor */
2337 tcursor(CURSOR_SAVE);
2338 term.esc = 0;
2339 break;
2340 case '8': /* DECRC -- Restore Cursor */
2341 tcursor(CURSOR_LOAD);
2342 term.esc = 0;
2343 break;
2344 case '\\': /* ST -- Stop */
2345 term.esc = 0;
2346 break;
2347 default:
2348 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2349 (uchar) ascii, isprint(ascii)? ascii:'.');
2350 term.esc = 0;
2351 }
2352 }
2353 /*
2354 * All characters which form part of a sequence are not
2355 * printed
2356 */
2357 return;
2358 }
2359 /*
2360 * Display control codes only if we are in graphic mode
2361 */
2362 if(control && !(term.c.attr.mode & ATTR_GFX))
2363 return;
2364 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2365 sel.bx = -1;
2366 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2367 term.line[term.c.y][term.c.x].mode |= ATTR_WRAP;
2368 tnewline(1);
2369 }
2370
2371 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2372 memmove(&term.line[term.c.y][term.c.x+1],
2373 &term.line[term.c.y][term.c.x],
2374 (term.col - term.c.x - 1) * sizeof(Glyph));
2375 }
2376
2377 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2378 if(term.c.x+1 < term.col) {
2379 tmoveto(term.c.x+1, term.c.y);
2380 } else {
2381 term.c.state |= CURSOR_WRAPNEXT;
2382 }
2383 }
2384
2385 int
2386 tresize(int col, int row) {
2387 int i;
2388 int minrow = MIN(row, term.row);
2389 int mincol = MIN(col, term.col);
2390 int slide = term.c.y - row + 1;
2391 bool *bp;
2392 Line *orig;
2393
2394 if(col < 1 || row < 1)
2395 return 0;
2396
2397 /* free unneeded rows */
2398 i = 0;
2399 if(slide > 0) {
2400 /*
2401 * slide screen to keep cursor where we expect it -
2402 * tscrollup would work here, but we can optimize to
2403 * memmove because we're freeing the earlier lines
2404 */
2405 for(/* i = 0 */; i < slide; i++) {
2406 free(term.line[i]);
2407 free(term.alt[i]);
2408 }
2409 memmove(term.line, term.line + slide, row * sizeof(Line));
2410 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2411 }
2412 for(i += row; i < term.row; i++) {
2413 free(term.line[i]);
2414 free(term.alt[i]);
2415 }
2416
2417 /* resize to new height */
2418 term.line = xrealloc(term.line, row * sizeof(Line));
2419 term.alt = xrealloc(term.alt, row * sizeof(Line));
2420 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2421 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2422
2423 /* resize each row to new width, zero-pad if needed */
2424 for(i = 0; i < minrow; i++) {
2425 term.dirty[i] = 1;
2426 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2427 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2428 }
2429
2430 /* allocate any new rows */
2431 for(/* i == minrow */; i < row; i++) {
2432 term.dirty[i] = 1;
2433 term.line[i] = xcalloc(col, sizeof(Glyph));
2434 term.alt [i] = xcalloc(col, sizeof(Glyph));
2435 }
2436 if(col > term.col) {
2437 bp = term.tabs + term.col;
2438
2439 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2440 while(--bp > term.tabs && !*bp)
2441 /* nothing */ ;
2442 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2443 *bp = 1;
2444 }
2445 /* update terminal size */
2446 term.col = col;
2447 term.row = row;
2448 /* reset scrolling region */
2449 tsetscroll(0, row-1);
2450 /* make use of the LIMIT in tmoveto */
2451 tmoveto(term.c.x, term.c.y);
2452 /* Clearing both screens */
2453 orig = term.line;
2454 do {
2455 if(mincol < col && 0 < minrow) {
2456 tclearregion(mincol, 0, col - 1, minrow - 1);
2457 }
2458 if(0 < col && minrow < row) {
2459 tclearregion(0, minrow, col - 1, row - 1);
2460 }
2461 tswapscreen();
2462 } while(orig != term.line);
2463
2464 return (slide > 0);
2465 }
2466
2467 void
2468 xresize(int col, int row) {
2469 xw.tw = MAX(1, col * xw.cw);
2470 xw.th = MAX(1, row * xw.ch);
2471
2472 XFreePixmap(xw.dpy, xw.buf);
2473 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2474 DefaultDepth(xw.dpy, xw.scr));
2475 XftDrawChange(xw.draw, xw.buf);
2476 xclear(0, 0, xw.w, xw.h);
2477 }
2478
2479 static inline ushort
2480 sixd_to_16bit(int x) {
2481 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2482 }
2483
2484 void
2485 xloadcols(void) {
2486 int i, r, g, b;
2487 XRenderColor color = { .alpha = 0xffff };
2488
2489 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2490 for(i = 0; i < LEN(colorname); i++) {
2491 if(!colorname[i])
2492 continue;
2493 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2494 die("Could not allocate color '%s'\n", colorname[i]);
2495 }
2496 }
2497
2498 /* load colors [16-255] ; same colors as xterm */
2499 for(i = 16, r = 0; r < 6; r++) {
2500 for(g = 0; g < 6; g++) {
2501 for(b = 0; b < 6; b++) {
2502 color.red = sixd_to_16bit(r);
2503 color.green = sixd_to_16bit(g);
2504 color.blue = sixd_to_16bit(b);
2505 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2506 die("Could not allocate color %d\n", i);
2507 }
2508 i++;
2509 }
2510 }
2511 }
2512
2513 for(r = 0; r < 24; r++, i++) {
2514 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2515 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2516 &dc.col[i])) {
2517 die("Could not allocate color %d\n", i);
2518 }
2519 }
2520 }
2521
2522 int
2523 xsetcolorname(int x, const char *name) {
2524 XRenderColor color = { .alpha = 0xffff };
2525 Colour colour;
2526 if (x < 0 || x > LEN(colorname))
2527 return -1;
2528 if(!name) {
2529 if(16 <= x && x < 16 + 216) {
2530 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2531 color.red = sixd_to_16bit(r);
2532 color.green = sixd_to_16bit(g);
2533 color.blue = sixd_to_16bit(b);
2534 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2535 return 0; /* something went wrong */
2536 dc.col[x] = colour;
2537 return 1;
2538 } else if (16 + 216 <= x && x < 256) {
2539 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2540 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2541 return 0; /* something went wrong */
2542 dc.col[x] = colour;
2543 return 1;
2544 } else {
2545 name = colorname[x];
2546 }
2547 }
2548 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2549 return 0;
2550 dc.col[x] = colour;
2551 return 1;
2552 }
2553
2554 void
2555 xtermclear(int col1, int row1, int col2, int row2) {
2556 XftDrawRect(xw.draw,
2557 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2558 borderpx + col1 * xw.cw,
2559 borderpx + row1 * xw.ch,
2560 (col2-col1+1) * xw.cw,
2561 (row2-row1+1) * xw.ch);
2562 }
2563
2564 /*
2565 * Absolute coordinates.
2566 */
2567 void
2568 xclear(int x1, int y1, int x2, int y2) {
2569 XftDrawRect(xw.draw,
2570 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2571 x1, y1, x2-x1, y2-y1);
2572 }
2573
2574 void
2575 xhints(void) {
2576 XClassHint class = {opt_class ? opt_class : termname, termname};
2577 XWMHints wm = {.flags = InputHint, .input = 1};
2578 XSizeHints *sizeh = NULL;
2579
2580 sizeh = XAllocSizeHints();
2581 if(xw.isfixed == False) {
2582 sizeh->flags = PSize | PResizeInc | PBaseSize;
2583 sizeh->height = xw.h;
2584 sizeh->width = xw.w;
2585 sizeh->height_inc = xw.ch;
2586 sizeh->width_inc = xw.cw;
2587 sizeh->base_height = 2 * borderpx;
2588 sizeh->base_width = 2 * borderpx;
2589 } else {
2590 sizeh->flags = PMaxSize | PMinSize;
2591 sizeh->min_width = sizeh->max_width = xw.fw;
2592 sizeh->min_height = sizeh->max_height = xw.fh;
2593 }
2594
2595 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2596 XFree(sizeh);
2597 }
2598
2599 int
2600 xloadfont(Font *f, FcPattern *pattern) {
2601 FcPattern *match;
2602 FcResult result;
2603
2604 match = FcFontMatch(NULL, pattern, &result);
2605 if(!match)
2606 return 1;
2607
2608 if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
2609 FcPatternDestroy(match);
2610 return 1;
2611 }
2612
2613 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2614 FcPatternDestroy(match);
2615 return 1;
2616 }
2617
2618 f->pattern = FcPatternDuplicate(pattern);
2619
2620 f->ascent = f->match->ascent;
2621 f->descent = f->match->descent;
2622 f->lbearing = 0;
2623 f->rbearing = f->match->max_advance_width;
2624
2625 f->height = f->ascent + f->descent;
2626 f->width = f->lbearing + f->rbearing;
2627
2628 return 0;
2629 }
2630
2631 void
2632 xloadfonts(char *fontstr, int fontsize) {
2633 FcPattern *pattern;
2634 FcResult result;
2635 double fontval;
2636
2637 if(fontstr[0] == '-') {
2638 pattern = XftXlfdParse(fontstr, False, False);
2639 } else {
2640 pattern = FcNameParse((FcChar8 *)fontstr);
2641 }
2642
2643 if(!pattern)
2644 die("st: can't open font %s\n", fontstr);
2645
2646 if(fontsize > 0) {
2647 FcPatternDel(pattern, FC_PIXEL_SIZE);
2648 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2649 usedfontsize = fontsize;
2650 } else {
2651 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2652 if(result == FcResultMatch) {
2653 usedfontsize = (int)fontval;
2654 } else {
2655 /*
2656 * Default font size is 12, if none given. This is to
2657 * have a known usedfontsize value.
2658 */
2659 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2660 usedfontsize = 12;
2661 }
2662 }
2663
2664 FcConfigSubstitute(0, pattern, FcMatchPattern);
2665 FcDefaultSubstitute(pattern);
2666
2667 if(xloadfont(&dc.font, pattern))
2668 die("st: can't open font %s\n", fontstr);
2669
2670 /* Setting character width and height. */
2671 xw.cw = dc.font.width;
2672 xw.ch = dc.font.height;
2673
2674 FcPatternDel(pattern, FC_SLANT);
2675 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2676 if(xloadfont(&dc.ifont, pattern))
2677 die("st: can't open font %s\n", fontstr);
2678
2679 FcPatternDel(pattern, FC_WEIGHT);
2680 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2681 if(xloadfont(&dc.ibfont, pattern))
2682 die("st: can't open font %s\n", fontstr);
2683
2684 FcPatternDel(pattern, FC_SLANT);
2685 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2686 if(xloadfont(&dc.bfont, pattern))
2687 die("st: can't open font %s\n", fontstr);
2688
2689 FcPatternDestroy(pattern);
2690 }
2691
2692 void
2693 xunloadfonts(void) {
2694 int i, ip;
2695
2696 /*
2697 * Free the loaded fonts in the font cache. This is done backwards
2698 * from the frccur.
2699 */
2700 for(i = 0, ip = frccur; i < frclen; i++, ip--) {
2701 if(ip < 0)
2702 ip = LEN(frc) - 1;
2703 XftFontClose(xw.dpy, frc[ip].font);
2704 }
2705 frccur = -1;
2706 frclen = 0;
2707
2708 XftFontClose(xw.dpy, dc.font.match);
2709 FcPatternDestroy(dc.font.pattern);
2710 FcFontSetDestroy(dc.font.set);
2711 XftFontClose(xw.dpy, dc.bfont.match);
2712 FcPatternDestroy(dc.bfont.pattern);
2713 FcFontSetDestroy(dc.bfont.set);
2714 XftFontClose(xw.dpy, dc.ifont.match);
2715 FcPatternDestroy(dc.ifont.pattern);
2716 FcFontSetDestroy(dc.ifont.set);
2717 XftFontClose(xw.dpy, dc.ibfont.match);
2718 FcPatternDestroy(dc.ibfont.pattern);
2719 FcFontSetDestroy(dc.ibfont.set);
2720 }
2721
2722 void
2723 xzoom(const Arg *arg) {
2724 xunloadfonts();
2725 xloadfonts(usedfont, usedfontsize + arg->i);
2726 cresize(0, 0);
2727 redraw(0);
2728 }
2729
2730 void
2731 xinit(void) {
2732 XSetWindowAttributes attrs;
2733 XGCValues gcvalues;
2734 Cursor cursor;
2735 Window parent;
2736 int sw, sh;
2737
2738 if(!(xw.dpy = XOpenDisplay(NULL)))
2739 die("Can't open display\n");
2740 xw.scr = XDefaultScreen(xw.dpy);
2741 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2742
2743 /* font */
2744 if(!FcInit())
2745 die("Could not init fontconfig.\n");
2746
2747 usedfont = (opt_font == NULL)? font : opt_font;
2748 xloadfonts(usedfont, 0);
2749
2750 /* colors */
2751 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2752 xloadcols();
2753
2754 /* adjust fixed window geometry */
2755 if(xw.isfixed) {
2756 sw = DisplayWidth(xw.dpy, xw.scr);
2757 sh = DisplayHeight(xw.dpy, xw.scr);
2758 if(xw.fx < 0)
2759 xw.fx = sw + xw.fx - xw.fw - 1;
2760 if(xw.fy < 0)
2761 xw.fy = sh + xw.fy - xw.fh - 1;
2762
2763 xw.h = xw.fh;
2764 xw.w = xw.fw;
2765 } else {
2766 /* window - default size */
2767 xw.h = 2 * borderpx + term.row * xw.ch;
2768 xw.w = 2 * borderpx + term.col * xw.cw;
2769 xw.fx = 0;
2770 xw.fy = 0;
2771 }
2772
2773 /* Events */
2774 attrs.background_pixel = dc.col[defaultbg].pixel;
2775 attrs.border_pixel = dc.col[defaultbg].pixel;
2776 attrs.bit_gravity = NorthWestGravity;
2777 attrs.event_mask = FocusChangeMask | KeyPressMask
2778 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2779 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2780 attrs.colormap = xw.cmap;
2781
2782 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2783 XRootWindow(xw.dpy, xw.scr);
2784 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2785 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2786 xw.vis,
2787 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2788 | CWColormap,
2789 &attrs);
2790
2791 memset(&gcvalues, 0, sizeof(gcvalues));
2792 gcvalues.graphics_exposures = False;
2793 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2794 &gcvalues);
2795 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2796 DefaultDepth(xw.dpy, xw.scr));
2797 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2798 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2799
2800 /* Xft rendering context */
2801 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2802
2803 /* input methods */
2804 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2805 XSetLocaleModifiers("@im=local");
2806 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2807 XSetLocaleModifiers("@im=");
2808 if((xw.xim = XOpenIM(xw.dpy,
2809 NULL, NULL, NULL)) == NULL) {
2810 die("XOpenIM failed. Could not open input"
2811 " device.\n");
2812 }
2813 }
2814 }
2815 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2816 | XIMStatusNothing, XNClientWindow, xw.win,
2817 XNFocusWindow, xw.win, NULL);
2818 if(xw.xic == NULL)
2819 die("XCreateIC failed. Could not obtain input method.\n");
2820
2821 /* white cursor, black outline */
2822 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2823 XDefineCursor(xw.dpy, xw.win, cursor);
2824 XRecolorCursor(xw.dpy, cursor,
2825 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2826 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2827
2828 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2829 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2830 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2831
2832 xresettitle();
2833 XMapWindow(xw.dpy, xw.win);
2834 xhints();
2835 XSync(xw.dpy, 0);
2836 }
2837
2838 void
2839 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2840 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2841 width = charlen * xw.cw, xp, i;
2842 int frp, frcflags;
2843 int u8fl, u8fblen, u8cblen, doesexist;
2844 char *u8c, *u8fs;
2845 long u8char;
2846 Font *font = &dc.font;
2847 FcResult fcres;
2848 FcPattern *fcpattern, *fontpattern;
2849 FcFontSet *fcsets[] = { NULL };
2850 FcCharSet *fccharset;
2851 Colour *fg, *bg, *temp, revfg, revbg;
2852 XRenderColor colfg, colbg;
2853 Rectangle r;
2854
2855 frcflags = FRC_NORMAL;
2856
2857 if(base.mode & ATTR_ITALIC) {
2858 if(base.fg == defaultfg)
2859 base.fg = defaultitalic;
2860 font = &dc.ifont;
2861 frcflags = FRC_ITALIC;
2862 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2863 if(base.fg == defaultfg)
2864 base.fg = defaultitalic;
2865 font = &dc.ibfont;
2866 frcflags = FRC_ITALICBOLD;
2867 } else if(base.mode & ATTR_UNDERLINE) {
2868 if(base.fg == defaultfg)
2869 base.fg = defaultunderline;
2870 }
2871 fg = &dc.col[base.fg];
2872 bg = &dc.col[base.bg];
2873
2874 if(base.mode & ATTR_BOLD) {
2875 if(BETWEEN(base.fg, 0, 7)) {
2876 /* basic system colors */
2877 fg = &dc.col[base.fg + 8];
2878 } else if(BETWEEN(base.fg, 16, 195)) {
2879 /* 256 colors */
2880 fg = &dc.col[base.fg + 36];
2881 } else if(BETWEEN(base.fg, 232, 251)) {
2882 /* greyscale */
2883 fg = &dc.col[base.fg + 4];
2884 }
2885 /*
2886 * Those ranges will not be brightened:
2887 * 8 - 15 – bright system colors
2888 * 196 - 231 – highest 256 color cube
2889 * 252 - 255 – brightest colors in greyscale
2890 */
2891 font = &dc.bfont;
2892 frcflags = FRC_BOLD;
2893 }
2894
2895 if(IS_SET(MODE_REVERSE)) {
2896 if(fg == &dc.col[defaultfg]) {
2897 fg = &dc.col[defaultbg];
2898 } else {
2899 colfg.red = ~fg->color.red;
2900 colfg.green = ~fg->color.green;
2901 colfg.blue = ~fg->color.blue;
2902 colfg.alpha = fg->color.alpha;
2903 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2904 fg = &revfg;
2905 }
2906
2907 if(bg == &dc.col[defaultbg]) {
2908 bg = &dc.col[defaultfg];
2909 } else {
2910 colbg.red = ~bg->color.red;
2911 colbg.green = ~bg->color.green;
2912 colbg.blue = ~bg->color.blue;
2913 colbg.alpha = bg->color.alpha;
2914 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2915 bg = &revbg;
2916 }
2917 }
2918
2919 if(base.mode & ATTR_REVERSE) {
2920 temp = fg;
2921 fg = bg;
2922 bg = temp;
2923 }
2924
2925 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
2926 fg = bg;
2927
2928 /* Intelligent cleaning up of the borders. */
2929 if(x == 0) {
2930 xclear(0, (y == 0)? 0 : winy, borderpx,
2931 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2932 }
2933 if(x + charlen >= term.col) {
2934 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2935 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2936 }
2937 if(y == 0)
2938 xclear(winx, 0, winx + width, borderpx);
2939 if(y == term.row-1)
2940 xclear(winx, winy + xw.ch, winx + width, xw.h);
2941
2942 /* Clean up the region we want to draw to. */
2943 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2944
2945 /* Set the clip region because Xft is sometimes dirty. */
2946 r.x = 0;
2947 r.y = 0;
2948 r.height = xw.ch;
2949 r.width = width;
2950 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
2951
2952 fcsets[0] = font->set;
2953 for(xp = winx; bytelen > 0;) {
2954 /*
2955 * Search for the range in the to be printed string of glyphs
2956 * that are in the main font. Then print that range. If
2957 * some glyph is found that is not in the font, do the
2958 * fallback dance.
2959 */
2960 u8fs = s;
2961 u8fblen = 0;
2962 u8fl = 0;
2963 for(;;) {
2964 u8c = s;
2965 u8cblen = utf8decode(s, &u8char);
2966 s += u8cblen;
2967 bytelen -= u8cblen;
2968
2969 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
2970 if(!doesexist || bytelen <= 0) {
2971 if(bytelen <= 0) {
2972 if(doesexist) {
2973 u8fl++;
2974 u8fblen += u8cblen;
2975 }
2976 }
2977
2978 if(u8fl > 0) {
2979 XftDrawStringUtf8(xw.draw, fg,
2980 font->match, xp,
2981 winy + font->ascent,
2982 (FcChar8 *)u8fs,
2983 u8fblen);
2984 xp += font->width * u8fl;
2985
2986 }
2987 break;
2988 }
2989
2990 u8fl++;
2991 u8fblen += u8cblen;
2992 }
2993 if(doesexist)
2994 break;
2995
2996 frp = frccur;
2997 /* Search the font cache. */
2998 for(i = 0; i < frclen; i++, frp--) {
2999 if(frp <= 0)
3000 frp = LEN(frc) - 1;
3001
3002 if(frc[frp].c == u8char
3003 && frc[frp].flags == frcflags) {
3004 break;
3005 }
3006 }
3007
3008 /* Nothing was found. */
3009 if(i >= frclen) {
3010 /*
3011 * Nothing was found in the cache. Now use
3012 * some dozen of Fontconfig calls to get the
3013 * font for one single character.
3014 */
3015 fcpattern = FcPatternDuplicate(font->pattern);
3016 fccharset = FcCharSetCreate();
3017
3018 FcCharSetAddChar(fccharset, u8char);
3019 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3020 fccharset);
3021 FcPatternAddBool(fcpattern, FC_SCALABLE,
3022 FcTrue);
3023
3024 FcConfigSubstitute(0, fcpattern,
3025 FcMatchPattern);
3026 FcDefaultSubstitute(fcpattern);
3027
3028 fontpattern = FcFontSetMatch(0, fcsets,
3029 FcTrue, fcpattern, &fcres);
3030
3031 /*
3032 * Overwrite or create the new cache entry.
3033 */
3034 frccur++;
3035 frclen++;
3036 if(frccur >= LEN(frc))
3037 frccur = 0;
3038 if(frclen > LEN(frc)) {
3039 frclen = LEN(frc);
3040 XftFontClose(xw.dpy, frc[frccur].font);
3041 }
3042
3043 frc[frccur].font = XftFontOpenPattern(xw.dpy,
3044 fontpattern);
3045 frc[frccur].c = u8char;
3046 frc[frccur].flags = frcflags;
3047
3048 FcPatternDestroy(fcpattern);
3049 FcCharSetDestroy(fccharset);
3050
3051 frp = frccur;
3052 }
3053
3054 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
3055 xp, winy + frc[frp].font->ascent,
3056 (FcChar8 *)u8c, u8cblen);
3057
3058 xp += font->width;
3059 }
3060
3061 /*
3062 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3063 winy + font->ascent, (FcChar8 *)s, bytelen);
3064 */
3065
3066 if(base.mode & ATTR_UNDERLINE) {
3067 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3068 width, 1);
3069 }
3070
3071 /* Reset clip to none. */
3072 XftDrawSetClip(xw.draw, 0);
3073 }
3074
3075 void
3076 xdrawcursor(void) {
3077 static int oldx = 0, oldy = 0;
3078 int sl;
3079 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3080
3081 LIMIT(oldx, 0, term.col-1);
3082 LIMIT(oldy, 0, term.row-1);
3083
3084 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3085
3086 /* remove the old cursor */
3087 sl = utf8size(term.line[oldy][oldx].c);
3088 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3089 oldy, 1, sl);
3090
3091 /* draw the new one */
3092 if(!(IS_SET(MODE_HIDE))) {
3093 if(xw.state & WIN_FOCUSED) {
3094 if(IS_SET(MODE_REVERSE)) {
3095 g.mode |= ATTR_REVERSE;
3096 g.fg = defaultcs;
3097 g.bg = defaultfg;
3098 }
3099
3100 sl = utf8size(g.c);
3101 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
3102 } else {
3103 XftDrawRect(xw.draw, &dc.col[defaultcs],
3104 borderpx + term.c.x * xw.cw,
3105 borderpx + term.c.y * xw.ch,
3106 xw.cw - 1, 1);
3107 XftDrawRect(xw.draw, &dc.col[defaultcs],
3108 borderpx + term.c.x * xw.cw,
3109 borderpx + term.c.y * xw.ch,
3110 1, xw.ch - 1);
3111 XftDrawRect(xw.draw, &dc.col[defaultcs],
3112 borderpx + (term.c.x + 1) * xw.cw - 1,
3113 borderpx + term.c.y * xw.ch,
3114 1, xw.ch - 1);
3115 XftDrawRect(xw.draw, &dc.col[defaultcs],
3116 borderpx + term.c.x * xw.cw,
3117 borderpx + (term.c.y + 1) * xw.ch - 1,
3118 xw.cw, 1);
3119 }
3120 oldx = term.c.x, oldy = term.c.y;
3121 }
3122 }
3123
3124
3125 void
3126 xsettitle(char *p) {
3127 XTextProperty prop;
3128
3129 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3130 &prop);
3131 XSetWMName(xw.dpy, xw.win, &prop);
3132 }
3133
3134 void
3135 xresettitle(void) {
3136 xsettitle(opt_title ? opt_title : "st");
3137 }
3138
3139 void
3140 redraw(int timeout) {
3141 struct timespec tv = {0, timeout * 1000};
3142
3143 tfulldirt();
3144 draw();
3145
3146 if(timeout > 0) {
3147 nanosleep(&tv, NULL);
3148 XSync(xw.dpy, False); /* necessary for a good tput flash */
3149 }
3150 }
3151
3152 void
3153 draw(void) {
3154 drawregion(0, 0, term.col, term.row);
3155 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3156 xw.h, 0, 0);
3157 XSetForeground(xw.dpy, dc.gc,
3158 dc.col[IS_SET(MODE_REVERSE)?
3159 defaultfg : defaultbg].pixel);
3160 }
3161
3162 void
3163 drawregion(int x1, int y1, int x2, int y2) {
3164 int ic, ib, x, y, ox, sl;
3165 Glyph base, new;
3166 char buf[DRAW_BUF_SIZ];
3167 bool ena_sel = sel.bx != -1;
3168
3169 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3170 ena_sel = 0;
3171
3172 if(!(xw.state & WIN_VISIBLE))
3173 return;
3174
3175 for(y = y1; y < y2; y++) {
3176 if(!term.dirty[y])
3177 continue;
3178
3179 xtermclear(0, y, term.col, y);
3180 term.dirty[y] = 0;
3181 base = term.line[y][0];
3182 ic = ib = ox = 0;
3183 for(x = x1; x < x2; x++) {
3184 new = term.line[y][x];
3185 if(ena_sel && selected(x, y))
3186 new.mode ^= ATTR_REVERSE;
3187 if(ib > 0 && (ATTRCMP(base, new)
3188 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3189 xdraws(buf, base, ox, y, ic, ib);
3190 ic = ib = 0;
3191 }
3192 if(ib == 0) {
3193 ox = x;
3194 base = new;
3195 }
3196
3197 sl = utf8size(new.c);
3198 memcpy(buf+ib, new.c, sl);
3199 ib += sl;
3200 ++ic;
3201 }
3202 if(ib > 0)
3203 xdraws(buf, base, ox, y, ic, ib);
3204 }
3205 xdrawcursor();
3206 }
3207
3208 void
3209 expose(XEvent *ev) {
3210 XExposeEvent *e = &ev->xexpose;
3211
3212 if(xw.state & WIN_REDRAW) {
3213 if(!e->count)
3214 xw.state &= ~WIN_REDRAW;
3215 }
3216 redraw(0);
3217 }
3218
3219 void
3220 visibility(XEvent *ev) {
3221 XVisibilityEvent *e = &ev->xvisibility;
3222
3223 if(e->state == VisibilityFullyObscured) {
3224 xw.state &= ~WIN_VISIBLE;
3225 } else if(!(xw.state & WIN_VISIBLE)) {
3226 /* need a full redraw for next Expose, not just a buf copy */
3227 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3228 }
3229 }
3230
3231 void
3232 unmap(XEvent *ev) {
3233 xw.state &= ~WIN_VISIBLE;
3234 }
3235
3236 void
3237 xseturgency(int add) {
3238 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3239
3240 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3241 XSetWMHints(xw.dpy, xw.win, h);
3242 XFree(h);
3243 }
3244
3245 void
3246 focus(XEvent *ev) {
3247 XFocusChangeEvent *e = &ev->xfocus;
3248
3249 if(e->mode == NotifyGrab)
3250 return;
3251
3252 if(ev->type == FocusIn) {
3253 XSetICFocus(xw.xic);
3254 xw.state |= WIN_FOCUSED;
3255 xseturgency(0);
3256 } else {
3257 XUnsetICFocus(xw.xic);
3258 xw.state &= ~WIN_FOCUSED;
3259 }
3260 }
3261
3262 inline bool
3263 match(uint mask, uint state) {
3264 state &= ~(ignoremod);
3265
3266 if(mask == XK_NO_MOD && state)
3267 return false;
3268 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3269 return false;
3270 if((state & mask) != state)
3271 return false;
3272 return true;
3273 }
3274
3275 void
3276 numlock(const Arg *dummy) {
3277 term.numlock ^= 1;
3278 }
3279
3280 char*
3281 kmap(KeySym k, uint state) {
3282 uint mask;
3283 Key *kp;
3284 int i;
3285
3286 /* Check for mapped keys out of X11 function keys. */
3287 for(i = 0; i < LEN(mappedkeys); i++) {
3288 if(mappedkeys[i] == k)
3289 break;
3290 }
3291 if(i == LEN(mappedkeys)) {
3292 if((k & 0xFFFF) < 0xFD00)
3293 return NULL;
3294 }
3295
3296 for(kp = key; kp < key + LEN(key); kp++) {
3297 mask = kp->mask;
3298
3299 if(kp->k != k)
3300 continue;
3301
3302 if(!match(mask, state))
3303 continue;
3304
3305 if(kp->appkey > 0) {
3306 if(!IS_SET(MODE_APPKEYPAD))
3307 continue;
3308 if(term.numlock && kp->appkey == 2)
3309 continue;
3310 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3311 continue;
3312 }
3313
3314 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3315 (kp->appcursor > 0
3316 && !IS_SET(MODE_APPCURSOR))) {
3317 continue;
3318 }
3319
3320 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3321 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3322 continue;
3323 }
3324
3325 return kp->s;
3326 }
3327
3328 return NULL;
3329 }
3330
3331 void
3332 kpress(XEvent *ev) {
3333 XKeyEvent *e = &ev->xkey;
3334 KeySym ksym;
3335 char xstr[31], buf[32], *customkey, *cp = buf;
3336 int len, ret;
3337 long c;
3338 Status status;
3339 Shortcut *bp;
3340
3341 if(IS_SET(MODE_KBDLOCK))
3342 return;
3343
3344 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3345 e->state &= ~Mod2Mask;
3346 /* 1. shortcuts */
3347 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3348 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3349 bp->func(&(bp->arg));
3350 return;
3351 }
3352 }
3353
3354 /* 2. custom keys from config.h */
3355 if((customkey = kmap(ksym, e->state))) {
3356 len = strlen(customkey);
3357 memcpy(buf, customkey, len);
3358 /* 3. hardcoded (overrides X lookup) */
3359 } else {
3360 if(len == 0)
3361 return;
3362
3363 if(len == 1 && e->state & Mod1Mask) {
3364 if(IS_SET(MODE_8BIT)) {
3365 if(*xstr < 0177) {
3366 c = *xstr | B7;
3367 ret = utf8encode(&c, cp);
3368 cp += ret;
3369 len = 0;
3370 }
3371 } else {
3372 *cp++ = '\033';
3373 }
3374 }
3375
3376 memcpy(cp, xstr, len);
3377 len = cp - buf + len;
3378 }
3379
3380 ttywrite(buf, len);
3381 if(IS_SET(MODE_ECHO))
3382 techo(buf, len);
3383 }
3384
3385
3386 void
3387 cmessage(XEvent *e) {
3388 /*
3389 * See xembed specs
3390 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3391 */
3392 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3393 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3394 xw.state |= WIN_FOCUSED;
3395 xseturgency(0);
3396 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3397 xw.state &= ~WIN_FOCUSED;
3398 }
3399 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3400 /* Send SIGHUP to shell */
3401 kill(pid, SIGHUP);
3402 exit(EXIT_SUCCESS);
3403 }
3404 }
3405
3406 void
3407 cresize(int width, int height) {
3408 int col, row;
3409
3410 if(width != 0)
3411 xw.w = width;
3412 if(height != 0)
3413 xw.h = height;
3414
3415 col = (xw.w - 2 * borderpx) / xw.cw;
3416 row = (xw.h - 2 * borderpx) / xw.ch;
3417
3418 tresize(col, row);
3419 xresize(col, row);
3420 ttyresize();
3421 }
3422
3423 void
3424 resize(XEvent *e) {
3425 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3426 return;
3427
3428 cresize(e->xconfigure.width, e->xconfigure.height);
3429 }
3430
3431 void
3432 run(void) {
3433 XEvent ev;
3434 fd_set rfd;
3435 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3436 struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
3437
3438 gettimeofday(&lastblink, NULL);
3439 gettimeofday(&last, NULL);
3440
3441 for(xev = actionfps;;) {
3442 FD_ZERO(&rfd);
3443 FD_SET(cmdfd, &rfd);
3444 FD_SET(xfd, &rfd);
3445
3446 switch(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3447 case -1:
3448 if(errno == EINTR)
3449 continue;
3450 die("select failed: %s\n", SERRNO);
3451 default:
3452 if(FD_ISSET(cmdfd, &rfd)) {
3453 ttyread();
3454 if(blinktimeout) {
3455 blinkset = tattrset(ATTR_BLINK);
3456 if(!blinkset && term.mode & ATTR_BLINK)
3457 term.mode &= ~(MODE_BLINK);
3458 }
3459 }
3460
3461 if(FD_ISSET(xfd, &rfd))
3462 xev = actionfps;
3463 break;
3464 }
3465 gettimeofday(&now, NULL);
3466 drawtimeout.tv_sec = 0;
3467 drawtimeout.tv_usec = (1000/xfps) * 1000;
3468 tv = &drawtimeout;
3469
3470 dodraw = 0;
3471 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3472 tsetdirtattr(ATTR_BLINK);
3473 term.mode ^= MODE_BLINK;
3474 gettimeofday(&lastblink, NULL);
3475 dodraw = 1;
3476 }
3477 if(TIMEDIFF(now, last) \
3478 > (xev? (1000/xfps) : (1000/actionfps))) {
3479 dodraw = 1;
3480 last = now;
3481 }
3482
3483 if(dodraw) {
3484 while(XPending(xw.dpy)) {
3485 XNextEvent(xw.dpy, &ev);
3486 if(XFilterEvent(&ev, None))
3487 continue;
3488 if(handler[ev.type])
3489 (handler[ev.type])(&ev);
3490 }
3491
3492 draw();
3493 XFlush(xw.dpy);
3494
3495 if(xev && !FD_ISSET(xfd, &rfd))
3496 xev--;
3497 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3498 if(blinkset) {
3499 drawtimeout.tv_usec = 1000 * \
3500 blinktimeout;
3501 } else {
3502 tv = NULL;
3503 }
3504 }
3505 }
3506 }
3507 }
3508
3509 void
3510 usage(void) {
3511 die("%s " VERSION " (c) 2010-2013 st engineers\n" \
3512 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3513 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3514 }
3515
3516 int
3517 main(int argc, char *argv[]) {
3518 int bitm, xr, yr;
3519 uint wr, hr;
3520
3521 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3522 xw.isfixed = False;
3523
3524 ARGBEGIN {
3525 case 'a':
3526 allowaltscreen = false;
3527 break;
3528 case 'c':
3529 opt_class = EARGF(usage());
3530 break;
3531 case 'e':
3532 /* eat all remaining arguments */
3533 if(argc > 1)
3534 opt_cmd = &argv[1];
3535 goto run;
3536 case 'f':
3537 opt_font = EARGF(usage());
3538 break;
3539 case 'g':
3540 bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
3541 if(bitm & XValue)
3542 xw.fx = xr;
3543 if(bitm & YValue)
3544 xw.fy = yr;
3545 if(bitm & WidthValue)
3546 xw.fw = (int)wr;
3547 if(bitm & HeightValue)
3548 xw.fh = (int)hr;
3549 if(bitm & XNegative && xw.fx == 0)
3550 xw.fx = -1;
3551 if(bitm & XNegative && xw.fy == 0)
3552 xw.fy = -1;
3553
3554 if(xw.fh != 0 && xw.fw != 0)
3555 xw.isfixed = True;
3556 break;
3557 case 'o':
3558 opt_io = EARGF(usage());
3559 break;
3560 case 't':
3561 opt_title = EARGF(usage());
3562 break;
3563 case 'w':
3564 opt_embed = EARGF(usage());
3565 break;
3566 case 'v':
3567 default:
3568 usage();
3569 } ARGEND;
3570
3571 run:
3572 setlocale(LC_CTYPE, "");
3573 XSetLocaleModifiers("");
3574 tnew(80, 24);
3575 xinit();
3576 ttynew();
3577 selinit();
3578 if(xw.isfixed)
3579 cresize(xw.h, xw.w);
3580 run();
3581
3582 return 0;
3583 }
3584