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St is in 2013 now.
[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #define _XOPEN_SOURCE 600
3 #include <ctype.h>
4 #include <errno.h>
5 #include <fcntl.h>
6 #include <limits.h>
7 #include <locale.h>
8 #include <pwd.h>
9 #include <stdarg.h>
10 #include <stdbool.h>
11 #include <stdio.h>
12 #include <stdlib.h>
13 #include <string.h>
14 #include <signal.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <sys/stat.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <sys/wait.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <X11/Xatom.h>
24 #include <X11/Xlib.h>
25 #include <X11/Xutil.h>
26 #include <X11/cursorfont.h>
27 #include <X11/keysym.h>
28 #include <X11/extensions/Xdbe.h>
29 #include <X11/Xft/Xft.h>
30 #include <fontconfig/fontconfig.h>
31
32 #define Glyph Glyph_
33 #define Font Font_
34 #define Draw XftDraw *
35 #define Colour XftColor
36 #define Colourmap Colormap
37
38 #if defined(__linux)
39 #include <pty.h>
40 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
41 #include <util.h>
42 #elif defined(__FreeBSD__) || defined(__DragonFly__)
43 #include <libutil.h>
44 #endif
45
46 #define USAGE \
47 "st " VERSION " (c) 2010-2013 st engineers\n" \
48 "usage: st [-v] [-c class] [-f font] [-g geometry] [-o file]" \
49 " [-t title] [-w windowid] [-e command ...]\n"
50
51 /* XEMBED messages */
52 #define XEMBED_FOCUS_IN 4
53 #define XEMBED_FOCUS_OUT 5
54
55 /* Arbitrary sizes */
56 #define UTF_SIZ 4
57 #define ESC_BUF_SIZ (128*UTF_SIZ)
58 #define ESC_ARG_SIZ 16
59 #define STR_BUF_SIZ ESC_BUF_SIZ
60 #define STR_ARG_SIZ ESC_ARG_SIZ
61 #define DRAW_BUF_SIZ 20*1024
62 #define XK_ANY_MOD UINT_MAX
63 #define XK_NO_MOD 0
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 };
90
91 enum cursor_movement {
92 CURSOR_SAVE,
93 CURSOR_LOAD
94 };
95
96 enum cursor_state {
97 CURSOR_DEFAULT = 0,
98 CURSOR_WRAPNEXT = 1,
99 CURSOR_ORIGIN = 2
100 };
101
102 enum glyph_state {
103 GLYPH_SET = 1,
104 GLYPH_DIRTY = 2
105 };
106
107 enum term_mode {
108 MODE_WRAP = 1,
109 MODE_INSERT = 2,
110 MODE_APPKEYPAD = 4,
111 MODE_ALTSCREEN = 8,
112 MODE_CRLF = 16,
113 MODE_MOUSEBTN = 32,
114 MODE_MOUSEMOTION = 64,
115 MODE_MOUSE = 32|64,
116 MODE_REVERSE = 128,
117 MODE_KBDLOCK = 256,
118 MODE_HIDE = 512,
119 MODE_ECHO = 1024,
120 MODE_APPCURSOR = 2048
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 /* bit macro */
139 #undef B0
140 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
141
142 typedef unsigned char uchar;
143 typedef unsigned int uint;
144 typedef unsigned long ulong;
145 typedef unsigned short ushort;
146
147 typedef struct {
148 char c[UTF_SIZ]; /* character code */
149 uchar mode; /* attribute flags */
150 ushort fg; /* foreground */
151 ushort bg; /* background */
152 uchar state; /* state flags */
153 } Glyph;
154
155 typedef Glyph *Line;
156
157 typedef struct {
158 Glyph attr; /* current char attributes */
159 int x;
160 int y;
161 char state;
162 } TCursor;
163
164 /* CSI Escape sequence structs */
165 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
166 typedef struct {
167 char buf[ESC_BUF_SIZ]; /* raw string */
168 int len; /* raw string length */
169 char priv;
170 int arg[ESC_ARG_SIZ];
171 int narg; /* nb of args */
172 char mode;
173 } CSIEscape;
174
175 /* STR Escape sequence structs */
176 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
177 typedef struct {
178 char type; /* ESC type ... */
179 char buf[STR_BUF_SIZ]; /* raw string */
180 int len; /* raw string length */
181 char *args[STR_ARG_SIZ];
182 int narg; /* nb of args */
183 } STREscape;
184
185 /* Internal representation of the screen */
186 typedef struct {
187 int row; /* nb row */
188 int col; /* nb col */
189 Line *line; /* screen */
190 Line *alt; /* alternate screen */
191 bool *dirty; /* dirtyness of lines */
192 TCursor c; /* cursor */
193 int top; /* top scroll limit */
194 int bot; /* bottom scroll limit */
195 int mode; /* terminal mode flags */
196 int esc; /* escape state flags */
197 bool numlock; /* lock numbers in keyboard */
198 bool *tabs;
199 } Term;
200
201 /* Purely graphic info */
202 typedef struct {
203 Display *dpy;
204 Colourmap cmap;
205 Window win;
206 Drawable buf;
207 Atom xembed, wmdeletewin;
208 XIM xim;
209 XIC xic;
210 Draw draw;
211 Visual *vis;
212 int scr;
213 bool isfixed; /* is fixed geometry? */
214 int fx, fy, fw, fh; /* fixed geometry */
215 int tw, th; /* tty width and height */
216 int w, h; /* window width and height */
217 int ch; /* char height */
218 int cw; /* char width */
219 char state; /* focus, redraw, visible */
220 } XWindow;
221
222 typedef struct {
223 KeySym k;
224 uint mask;
225 char s[ESC_BUF_SIZ];
226 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
227 signed char appkey; /* application keypad */
228 signed char appcursor; /* application cursor */
229 signed char crlf; /* crlf mode */
230 } Key;
231
232 /* TODO: use better name for vars... */
233 typedef struct {
234 int mode;
235 int bx, by;
236 int ex, ey;
237 struct {
238 int x, y;
239 } b, e;
240 char *clip;
241 Atom xtarget;
242 bool alt;
243 struct timeval tclick1;
244 struct timeval tclick2;
245 } Selection;
246
247 typedef union {
248 int i;
249 unsigned int ui;
250 float f;
251 const void *v;
252 } Arg;
253
254 typedef struct {
255 unsigned int mod;
256 KeySym keysym;
257 void (*func)(const Arg *);
258 const Arg arg;
259 } Shortcut;
260
261 /* function definitions used in config.h */
262 static void xzoom(const Arg *);
263 static void selpaste(const Arg *);
264 static void numlock(const Arg *);
265
266 /* Config.h for applying patches and the configuration. */
267 #include "config.h"
268
269 /* Font structure */
270 typedef struct {
271 int height;
272 int width;
273 int ascent;
274 int descent;
275 short lbearing;
276 short rbearing;
277 XftFont *match;
278 FcFontSet *set;
279 FcPattern *pattern;
280 } Font;
281
282 /* Drawing Context */
283 typedef struct {
284 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
285 Font font, bfont, ifont, ibfont;
286 GC gc;
287 } DC;
288
289 static void die(const char *, ...);
290 static void draw(void);
291 static void redraw(int);
292 static void drawregion(int, int, int, int);
293 static void execsh(void);
294 static void sigchld(int);
295 static void run(void);
296
297 static void csidump(void);
298 static void csihandle(void);
299 static void csiparse(void);
300 static void csireset(void);
301 static void strdump(void);
302 static void strhandle(void);
303 static void strparse(void);
304 static void strreset(void);
305
306 static void tclearregion(int, int, int, int, int);
307 static void tcursor(int);
308 static void tdeletechar(int);
309 static void tdeleteline(int);
310 static void tinsertblank(int);
311 static void tinsertblankline(int);
312 static void tmoveto(int, int);
313 static void tmoveato(int x, int y);
314 static void tnew(int, int);
315 static void tnewline(int);
316 static void tputtab(bool);
317 static void tputc(char *, int);
318 static void treset(void);
319 static int tresize(int, int);
320 static void tscrollup(int, int);
321 static void tscrolldown(int, int);
322 static void tsetattr(int*, int);
323 static void tsetchar(char *, Glyph *, int, int);
324 static void tsetscroll(int, int);
325 static void tswapscreen(void);
326 static void tsetdirt(int, int);
327 static void tsetmode(bool, bool, int *, int);
328 static void tfulldirt(void);
329 static void techo(char *, int);
330
331 static inline bool match(uint, uint);
332 static void ttynew(void);
333 static void ttyread(void);
334 static void ttyresize(void);
335 static void ttywrite(const char *, size_t);
336
337 static void xdraws(char *, Glyph, int, int, int, int);
338 static void xhints(void);
339 static void xclear(int, int, int, int);
340 static void xdrawcursor(void);
341 static void xinit(void);
342 static void xloadcols(void);
343 static int xloadfont(Font *, FcPattern *);
344 static void xloadfonts(char *, int);
345 static void xresettitle(void);
346 static void xseturgency(int);
347 static void xsetsel(char*);
348 static void xtermclear(int, int, int, int);
349 static void xunloadfonts(void);
350 static void xresize(int, int);
351
352 static void expose(XEvent *);
353 static void visibility(XEvent *);
354 static void unmap(XEvent *);
355 static char *kmap(KeySym, uint);
356 static void kpress(XEvent *);
357 static void cmessage(XEvent *);
358 static void cresize(int, int);
359 static void resize(XEvent *);
360 static void focus(XEvent *);
361 static void brelease(XEvent *);
362 static void bpress(XEvent *);
363 static void bmotion(XEvent *);
364 static void selnotify(XEvent *);
365 static void selclear(XEvent *);
366 static void selrequest(XEvent *);
367
368 static void selinit(void);
369 static inline bool selected(int, int);
370 static void selcopy(void);
371 static void selscroll(int, int);
372
373 static int utf8decode(char *, long *);
374 static int utf8encode(long *, char *);
375 static int utf8size(char *);
376 static int isfullutf8(char *, int);
377
378 static ssize_t xwrite(int, char *, size_t);
379 static void *xmalloc(size_t);
380 static void *xrealloc(void *, size_t);
381 static void *xcalloc(size_t, size_t);
382
383 static void (*handler[LASTEvent])(XEvent *) = {
384 [KeyPress] = kpress,
385 [ClientMessage] = cmessage,
386 [ConfigureNotify] = resize,
387 [VisibilityNotify] = visibility,
388 [UnmapNotify] = unmap,
389 [Expose] = expose,
390 [FocusIn] = focus,
391 [FocusOut] = focus,
392 [MotionNotify] = bmotion,
393 [ButtonPress] = bpress,
394 [ButtonRelease] = brelease,
395 [SelectionClear] = selclear,
396 [SelectionNotify] = selnotify,
397 [SelectionRequest] = selrequest,
398 };
399
400 /* Globals */
401 static DC dc;
402 static XWindow xw;
403 static Term term;
404 static CSIEscape csiescseq;
405 static STREscape strescseq;
406 static int cmdfd;
407 static pid_t pid;
408 static Selection sel;
409 static int iofd = -1;
410 static char **opt_cmd = NULL;
411 static char *opt_io = NULL;
412 static char *opt_title = NULL;
413 static char *opt_embed = NULL;
414 static char *opt_class = NULL;
415 static char *opt_font = NULL;
416
417 bool usedbe = False;
418
419 static char *usedfont = NULL;
420 static int usedfontsize = 0;
421
422 /* Font Ring Cache */
423 enum {
424 FRC_NORMAL,
425 FRC_ITALIC,
426 FRC_BOLD,
427 FRC_ITALICBOLD
428 };
429
430 typedef struct {
431 XftFont *font;
432 long c;
433 int flags;
434 } Fontcache;
435
436 /*
437 * Fontcache is a ring buffer, with frccur as current position and frclen as
438 * the current length of used elements.
439 */
440
441 static Fontcache frc[1024];
442 static int frccur = -1, frclen = 0;
443
444 ssize_t
445 xwrite(int fd, char *s, size_t len) {
446 size_t aux = len;
447
448 while(len > 0) {
449 ssize_t r = write(fd, s, len);
450 if(r < 0)
451 return r;
452 len -= r;
453 s += r;
454 }
455 return aux;
456 }
457
458 void *
459 xmalloc(size_t len) {
460 void *p = malloc(len);
461
462 if(!p)
463 die("Out of memory\n");
464
465 return p;
466 }
467
468 void *
469 xrealloc(void *p, size_t len) {
470 if((p = realloc(p, len)) == NULL)
471 die("Out of memory\n");
472
473 return p;
474 }
475
476 void *
477 xcalloc(size_t nmemb, size_t size) {
478 void *p = calloc(nmemb, size);
479
480 if(!p)
481 die("Out of memory\n");
482
483 return p;
484 }
485
486 int
487 utf8decode(char *s, long *u) {
488 uchar c;
489 int i, n, rtn;
490
491 rtn = 1;
492 c = *s;
493 if(~c & B7) { /* 0xxxxxxx */
494 *u = c;
495 return rtn;
496 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
497 *u = c&(B4|B3|B2|B1|B0);
498 n = 1;
499 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
500 *u = c&(B3|B2|B1|B0);
501 n = 2;
502 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
503 *u = c & (B2|B1|B0);
504 n = 3;
505 } else {
506 goto invalid;
507 }
508
509 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
510 c = *s;
511 if((c & (B7|B6)) != B7) /* 10xxxxxx */
512 goto invalid;
513 *u <<= 6;
514 *u |= c & (B5|B4|B3|B2|B1|B0);
515 }
516
517 if((n == 1 && *u < 0x80) ||
518 (n == 2 && *u < 0x800) ||
519 (n == 3 && *u < 0x10000) ||
520 (*u >= 0xD800 && *u <= 0xDFFF)) {
521 goto invalid;
522 }
523
524 return rtn;
525 invalid:
526 *u = 0xFFFD;
527
528 return rtn;
529 }
530
531 int
532 utf8encode(long *u, char *s) {
533 uchar *sp;
534 ulong uc;
535 int i, n;
536
537 sp = (uchar *)s;
538 uc = *u;
539 if(uc < 0x80) {
540 *sp = uc; /* 0xxxxxxx */
541 return 1;
542 } else if(*u < 0x800) {
543 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
544 n = 1;
545 } else if(uc < 0x10000) {
546 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
547 n = 2;
548 } else if(uc <= 0x10FFFF) {
549 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
550 n = 3;
551 } else {
552 goto invalid;
553 }
554
555 for(i=n,++sp; i>0; --i,++sp)
556 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
557
558 return n+1;
559 invalid:
560 /* U+FFFD */
561 *s++ = '\xEF';
562 *s++ = '\xBF';
563 *s = '\xBD';
564
565 return 3;
566 }
567
568 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
569 UTF-8 otherwise return 0 */
570 int
571 isfullutf8(char *s, int b) {
572 uchar *c1, *c2, *c3;
573
574 c1 = (uchar *)s;
575 c2 = (uchar *)++s;
576 c3 = (uchar *)++s;
577 if(b < 1) {
578 return 0;
579 } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
580 return 0;
581 } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
582 ((b == 1) ||
583 ((b == 2) && (*c2&(B7|B6)) == B7))) {
584 return 0;
585 } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
586 ((b == 1) ||
587 ((b == 2) && (*c2&(B7|B6)) == B7) ||
588 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
589 return 0;
590 } else {
591 return 1;
592 }
593 }
594
595 int
596 utf8size(char *s) {
597 uchar c = *s;
598
599 if(~c&B7) {
600 return 1;
601 } else if((c&(B7|B6|B5)) == (B7|B6)) {
602 return 2;
603 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
604 return 3;
605 } else {
606 return 4;
607 }
608 }
609
610 void
611 selinit(void) {
612 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
613 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
614 sel.mode = 0;
615 sel.bx = -1;
616 sel.clip = NULL;
617 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
618 if(sel.xtarget == None)
619 sel.xtarget = XA_STRING;
620 }
621
622 static int
623 x2col(int x) {
624 x -= borderpx;
625 x /= xw.cw;
626
627 return LIMIT(x, 0, term.col-1);
628 }
629
630 static int
631 y2row(int y) {
632 y -= borderpx;
633 y /= xw.ch;
634
635 return LIMIT(y, 0, term.row-1);
636 }
637
638 static inline bool
639 selected(int x, int y) {
640 int bx, ex;
641
642 if(sel.ey == y && sel.by == y) {
643 bx = MIN(sel.bx, sel.ex);
644 ex = MAX(sel.bx, sel.ex);
645 return BETWEEN(x, bx, ex);
646 }
647
648 return ((sel.b.y < y && y < sel.e.y)
649 || (y == sel.e.y && x <= sel.e.x))
650 || (y == sel.b.y && x >= sel.b.x
651 && (x <= sel.e.x || sel.b.y != sel.e.y));
652 }
653
654 void
655 getbuttoninfo(XEvent *e) {
656 sel.alt = IS_SET(MODE_ALTSCREEN);
657
658 sel.ex = x2col(e->xbutton.x);
659 sel.ey = y2row(e->xbutton.y);
660
661 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
662 sel.b.y = MIN(sel.by, sel.ey);
663 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
664 sel.e.y = MAX(sel.by, sel.ey);
665 }
666
667 void
668 mousereport(XEvent *e) {
669 int x = x2col(e->xbutton.x);
670 int y = y2row(e->xbutton.y);
671 int button = e->xbutton.button;
672 int state = e->xbutton.state;
673 char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
674 static int ob, ox, oy;
675
676 /* from urxvt */
677 if(e->xbutton.type == MotionNotify) {
678 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
679 return;
680 button = ob + 32;
681 ox = x, oy = y;
682 } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
683 button = 3;
684 } else {
685 button -= Button1;
686 if(button >= 3)
687 button += 64 - 3;
688 if(e->xbutton.type == ButtonPress) {
689 ob = button;
690 ox = x, oy = y;
691 }
692 }
693
694 buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
695 + (state & Mod4Mask ? 8 : 0)
696 + (state & ControlMask ? 16 : 0);
697
698 ttywrite(buf, sizeof(buf));
699 }
700
701 void
702 bpress(XEvent *e) {
703 if(IS_SET(MODE_MOUSE)) {
704 mousereport(e);
705 } else if(e->xbutton.button == Button1) {
706 if(sel.bx != -1) {
707 sel.bx = -1;
708 tsetdirt(sel.b.y, sel.e.y);
709 draw();
710 }
711 sel.mode = 1;
712 sel.ex = sel.bx = x2col(e->xbutton.x);
713 sel.ey = sel.by = y2row(e->xbutton.y);
714 } else if(e->xbutton.button == Button4) {
715 ttywrite("\031", 1);
716 } else if(e->xbutton.button == Button5) {
717 ttywrite("\005", 1);
718 }
719 }
720
721 void
722 selcopy(void) {
723 char *str, *ptr, *p;
724 int x, y, bufsize, is_selected = 0, size;
725 Glyph *gp, *last;
726
727 if(sel.bx == -1) {
728 str = NULL;
729 } else {
730 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
731 ptr = str = xmalloc(bufsize);
732
733 /* append every set & selected glyph to the selection */
734 for(y = 0; y < term.row; y++) {
735 gp = &term.line[y][0];
736 last = gp + term.col;
737
738 while(--last >= gp && !(last->state & GLYPH_SET))
739 /* nothing */;
740
741 for(x = 0; gp <= last; x++, ++gp) {
742 if(!(is_selected = selected(x, y)))
743 continue;
744
745 p = (gp->state & GLYPH_SET) ? gp->c : " ";
746 size = utf8size(p);
747 memcpy(ptr, p, size);
748 ptr += size;
749 }
750 /* \n at the end of every selected line except for the last one */
751 if(is_selected && y < sel.e.y)
752 *ptr++ = '\n';
753 }
754 *ptr = 0;
755 }
756 xsetsel(str);
757 }
758
759 void
760 selnotify(XEvent *e) {
761 ulong nitems, ofs, rem;
762 int format;
763 uchar *data;
764 Atom type;
765
766 ofs = 0;
767 do {
768 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
769 False, AnyPropertyType, &type, &format,
770 &nitems, &rem, &data)) {
771 fprintf(stderr, "Clipboard allocation failed\n");
772 return;
773 }
774 ttywrite((const char *) data, nitems * format / 8);
775 XFree(data);
776 /* number of 32-bit chunks returned */
777 ofs += nitems * format / 32;
778 } while(rem > 0);
779 }
780
781 void
782 selpaste(const Arg *dummy) {
783 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
784 xw.win, CurrentTime);
785 }
786
787 void selclear(XEvent *e) {
788 if(sel.bx == -1)
789 return;
790 sel.bx = -1;
791 tsetdirt(sel.b.y, sel.e.y);
792 }
793
794 void
795 selrequest(XEvent *e) {
796 XSelectionRequestEvent *xsre;
797 XSelectionEvent xev;
798 Atom xa_targets, string;
799
800 xsre = (XSelectionRequestEvent *) e;
801 xev.type = SelectionNotify;
802 xev.requestor = xsre->requestor;
803 xev.selection = xsre->selection;
804 xev.target = xsre->target;
805 xev.time = xsre->time;
806 /* reject */
807 xev.property = None;
808
809 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
810 if(xsre->target == xa_targets) {
811 /* respond with the supported type */
812 string = sel.xtarget;
813 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
814 XA_ATOM, 32, PropModeReplace,
815 (uchar *) &string, 1);
816 xev.property = xsre->property;
817 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
818 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
819 xsre->target, 8, PropModeReplace,
820 (uchar *) sel.clip, strlen(sel.clip));
821 xev.property = xsre->property;
822 }
823
824 /* all done, send a notification to the listener */
825 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
826 fprintf(stderr, "Error sending SelectionNotify event\n");
827 }
828
829 void
830 xsetsel(char *str) {
831 /* register the selection for both the clipboard and the primary */
832 Atom clipboard;
833
834 free(sel.clip);
835 sel.clip = str;
836
837 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
838
839 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
840 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
841 }
842
843 void
844 brelease(XEvent *e) {
845 struct timeval now;
846
847 if(IS_SET(MODE_MOUSE)) {
848 mousereport(e);
849 return;
850 }
851
852 if(e->xbutton.button == Button2) {
853 selpaste(NULL);
854 } else if(e->xbutton.button == Button1) {
855 sel.mode = 0;
856 getbuttoninfo(e);
857 term.dirty[sel.ey] = 1;
858 if(sel.bx == sel.ex && sel.by == sel.ey) {
859 sel.bx = -1;
860 gettimeofday(&now, NULL);
861
862 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
863 /* triple click on the line */
864 sel.b.x = sel.bx = 0;
865 sel.e.x = sel.ex = term.col;
866 sel.b.y = sel.e.y = sel.ey;
867 selcopy();
868 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
869 /* double click to select word */
870 sel.bx = sel.ex;
871 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
872 term.line[sel.ey][sel.bx-1].c[0] != ' ') {
873 sel.bx--;
874 }
875 sel.b.x = sel.bx;
876 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
877 term.line[sel.ey][sel.ex+1].c[0] != ' ') {
878 sel.ex++;
879 }
880 sel.e.x = sel.ex;
881 sel.b.y = sel.e.y = sel.ey;
882 selcopy();
883 }
884 } else {
885 selcopy();
886 }
887 }
888
889 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
890 gettimeofday(&sel.tclick1, NULL);
891 }
892
893 void
894 bmotion(XEvent *e) {
895 int starty, endy, oldey, oldex;
896
897 if(IS_SET(MODE_MOUSE)) {
898 mousereport(e);
899 return;
900 }
901
902 if(!sel.mode)
903 return;
904
905 oldey = sel.ey;
906 oldex = sel.ex;
907 getbuttoninfo(e);
908
909 if(oldey != sel.ey || oldex != sel.ex) {
910 starty = MIN(oldey, sel.ey);
911 endy = MAX(oldey, sel.ey);
912 tsetdirt(starty, endy);
913 }
914 }
915
916 void
917 die(const char *errstr, ...) {
918 va_list ap;
919
920 va_start(ap, errstr);
921 vfprintf(stderr, errstr, ap);
922 va_end(ap);
923 exit(EXIT_FAILURE);
924 }
925
926 void
927 execsh(void) {
928 char **args;
929 char *envshell = getenv("SHELL");
930 const struct passwd *pass = getpwuid(getuid());
931 char buf[sizeof(long) * 8 + 1];
932
933 unsetenv("COLUMNS");
934 unsetenv("LINES");
935 unsetenv("TERMCAP");
936
937 if(pass) {
938 setenv("LOGNAME", pass->pw_name, 1);
939 setenv("USER", pass->pw_name, 1);
940 setenv("SHELL", pass->pw_shell, 0);
941 setenv("HOME", pass->pw_dir, 0);
942 }
943
944 snprintf(buf, sizeof(buf), "%lu", xw.win);
945 setenv("WINDOWID", buf, 1);
946
947 signal(SIGCHLD, SIG_DFL);
948 signal(SIGHUP, SIG_DFL);
949 signal(SIGINT, SIG_DFL);
950 signal(SIGQUIT, SIG_DFL);
951 signal(SIGTERM, SIG_DFL);
952 signal(SIGALRM, SIG_DFL);
953
954 DEFAULT(envshell, shell);
955 setenv("TERM", termname, 1);
956 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
957 execvp(args[0], args);
958 exit(EXIT_FAILURE);
959 }
960
961 void
962 sigchld(int a) {
963 int stat = 0;
964
965 if(waitpid(pid, &stat, 0) < 0)
966 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
967
968 if(WIFEXITED(stat)) {
969 exit(WEXITSTATUS(stat));
970 } else {
971 exit(EXIT_FAILURE);
972 }
973 }
974
975 void
976 ttynew(void) {
977 int m, s;
978 struct winsize w = {term.row, term.col, 0, 0};
979
980 /* seems to work fine on linux, openbsd and freebsd */
981 if(openpty(&m, &s, NULL, NULL, &w) < 0)
982 die("openpty failed: %s\n", SERRNO);
983
984 switch(pid = fork()) {
985 case -1:
986 die("fork failed\n");
987 break;
988 case 0:
989 setsid(); /* create a new process group */
990 dup2(s, STDIN_FILENO);
991 dup2(s, STDOUT_FILENO);
992 dup2(s, STDERR_FILENO);
993 if(ioctl(s, TIOCSCTTY, NULL) < 0)
994 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
995 close(s);
996 close(m);
997 execsh();
998 break;
999 default:
1000 close(s);
1001 cmdfd = m;
1002 signal(SIGCHLD, sigchld);
1003 if(opt_io) {
1004 iofd = (!strcmp(opt_io, "-")) ?
1005 STDOUT_FILENO :
1006 open(opt_io, O_WRONLY | O_CREAT, 0666);
1007 if(iofd < 0) {
1008 fprintf(stderr, "Error opening %s:%s\n",
1009 opt_io, strerror(errno));
1010 }
1011 }
1012 }
1013 }
1014
1015 void
1016 dump(char c) {
1017 static int col;
1018
1019 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1020 if(++col % 10 == 0)
1021 fprintf(stderr, "\n");
1022 }
1023
1024 void
1025 ttyread(void) {
1026 static char buf[BUFSIZ];
1027 static int buflen = 0;
1028 char *ptr;
1029 char s[UTF_SIZ];
1030 int charsize; /* size of utf8 char in bytes */
1031 long utf8c;
1032 int ret;
1033
1034 /* append read bytes to unprocessed bytes */
1035 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1036 die("Couldn't read from shell: %s\n", SERRNO);
1037
1038 /* process every complete utf8 char */
1039 buflen += ret;
1040 ptr = buf;
1041 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1042 charsize = utf8decode(ptr, &utf8c);
1043 utf8encode(&utf8c, s);
1044 tputc(s, charsize);
1045 ptr += charsize;
1046 buflen -= charsize;
1047 }
1048
1049 /* keep any uncomplete utf8 char for the next call */
1050 memmove(buf, ptr, buflen);
1051 }
1052
1053 void
1054 ttywrite(const char *s, size_t n) {
1055 if(write(cmdfd, s, n) == -1)
1056 die("write error on tty: %s\n", SERRNO);
1057 }
1058
1059 void
1060 ttyresize(void) {
1061 struct winsize w;
1062
1063 w.ws_row = term.row;
1064 w.ws_col = term.col;
1065 w.ws_xpixel = xw.tw;
1066 w.ws_ypixel = xw.th;
1067 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1068 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1069 }
1070
1071 void
1072 tsetdirt(int top, int bot) {
1073 int i;
1074
1075 LIMIT(top, 0, term.row-1);
1076 LIMIT(bot, 0, term.row-1);
1077
1078 for(i = top; i <= bot; i++)
1079 term.dirty[i] = 1;
1080 }
1081
1082 void
1083 tfulldirt(void) {
1084 tsetdirt(0, term.row-1);
1085 }
1086
1087 void
1088 tcursor(int mode) {
1089 static TCursor c;
1090
1091 if(mode == CURSOR_SAVE) {
1092 c = term.c;
1093 } else if(mode == CURSOR_LOAD) {
1094 term.c = c;
1095 tmoveto(c.x, c.y);
1096 }
1097 }
1098
1099 void
1100 treset(void) {
1101 uint i;
1102
1103 term.c = (TCursor){{
1104 .mode = ATTR_NULL,
1105 .fg = defaultfg,
1106 .bg = defaultbg
1107 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1108
1109 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1110 for(i = tabspaces; i < term.col; i += tabspaces)
1111 term.tabs[i] = 1;
1112 term.top = 0;
1113 term.bot = term.row - 1;
1114 term.mode = MODE_WRAP;
1115
1116 tclearregion(0, 0, term.col-1, term.row-1, 0);
1117 tmoveto(0, 0);
1118 tcursor(CURSOR_SAVE);
1119 }
1120
1121 void
1122 tnew(int col, int row) {
1123 /* set screen size */
1124 term.row = row;
1125 term.col = col;
1126 term.line = xmalloc(term.row * sizeof(Line));
1127 term.alt = xmalloc(term.row * sizeof(Line));
1128 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
1129 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
1130
1131 for(row = 0; row < term.row; row++) {
1132 term.line[row] = xmalloc(term.col * sizeof(Glyph));
1133 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
1134 term.dirty[row] = 0;
1135 }
1136
1137 term.numlock = 1;
1138 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1139 /* setup screen */
1140 treset();
1141 }
1142
1143 void
1144 tswapscreen(void) {
1145 Line *tmp = term.line;
1146
1147 term.line = term.alt;
1148 term.alt = tmp;
1149 term.mode ^= MODE_ALTSCREEN;
1150 tfulldirt();
1151 }
1152
1153 void
1154 tscrolldown(int orig, int n) {
1155 int i;
1156 Line temp;
1157
1158 LIMIT(n, 0, term.bot-orig+1);
1159
1160 tclearregion(0, term.bot-n+1, term.col-1, term.bot, 0);
1161
1162 for(i = term.bot; i >= orig+n; i--) {
1163 temp = term.line[i];
1164 term.line[i] = term.line[i-n];
1165 term.line[i-n] = temp;
1166
1167 term.dirty[i] = 1;
1168 term.dirty[i-n] = 1;
1169 }
1170
1171 selscroll(orig, n);
1172 }
1173
1174 void
1175 tscrollup(int orig, int n) {
1176 int i;
1177 Line temp;
1178 LIMIT(n, 0, term.bot-orig+1);
1179
1180 tclearregion(0, orig, term.col-1, orig+n-1, 0);
1181
1182 for(i = orig; i <= term.bot-n; i++) {
1183 temp = term.line[i];
1184 term.line[i] = term.line[i+n];
1185 term.line[i+n] = temp;
1186
1187 term.dirty[i] = 1;
1188 term.dirty[i+n] = 1;
1189 }
1190
1191 selscroll(orig, -n);
1192 }
1193
1194 void
1195 selscroll(int orig, int n) {
1196 if(sel.bx == -1)
1197 return;
1198
1199 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1200 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1201 sel.bx = -1;
1202 return;
1203 }
1204 if(sel.by < term.top) {
1205 sel.by = term.top;
1206 sel.bx = 0;
1207 }
1208 if(sel.ey > term.bot) {
1209 sel.ey = term.bot;
1210 sel.ex = term.col;
1211 }
1212 sel.b.y = sel.by, sel.b.x = sel.bx;
1213 sel.e.y = sel.ey, sel.e.x = sel.ex;
1214 }
1215 }
1216
1217 void
1218 tnewline(int first_col) {
1219 int y = term.c.y;
1220
1221 if(y == term.bot) {
1222 tscrollup(term.top, 1);
1223 } else {
1224 y++;
1225 }
1226 tmoveto(first_col ? 0 : term.c.x, y);
1227 }
1228
1229 void
1230 csiparse(void) {
1231 /* int noarg = 1; */
1232 char *p = csiescseq.buf;
1233
1234 csiescseq.narg = 0;
1235 if(*p == '?')
1236 csiescseq.priv = 1, p++;
1237
1238 while(p < csiescseq.buf+csiescseq.len) {
1239 while(isdigit(*p)) {
1240 csiescseq.arg[csiescseq.narg] *= 10;
1241 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1242 }
1243 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ) {
1244 csiescseq.narg++, p++;
1245 } else {
1246 csiescseq.mode = *p;
1247 csiescseq.narg++;
1248
1249 return;
1250 }
1251 }
1252 }
1253
1254 /* for absolute user moves, when decom is set */
1255 void
1256 tmoveato(int x, int y) {
1257 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1258 }
1259
1260 void
1261 tmoveto(int x, int y) {
1262 int miny, maxy;
1263
1264 if(term.c.state & CURSOR_ORIGIN) {
1265 miny = term.top;
1266 maxy = term.bot;
1267 } else {
1268 miny = 0;
1269 maxy = term.row - 1;
1270 }
1271 LIMIT(x, 0, term.col-1);
1272 LIMIT(y, miny, maxy);
1273 term.c.state &= ~CURSOR_WRAPNEXT;
1274 term.c.x = x;
1275 term.c.y = y;
1276 }
1277
1278 void
1279 tsetchar(char *c, Glyph *attr, int x, int y) {
1280 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1281 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1282 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1283 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1284 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1285 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1286 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1287 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1288 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1289 };
1290
1291 /*
1292 * The table is proudly stolen from rxvt.
1293 */
1294 if(attr->mode & ATTR_GFX) {
1295 if(c[0] >= 0x41 && c[0] <= 0x7e
1296 && vt100_0[c[0] - 0x41]) {
1297 c = vt100_0[c[0] - 0x41];
1298 }
1299 }
1300
1301 term.dirty[y] = 1;
1302 term.line[y][x] = *attr;
1303 memcpy(term.line[y][x].c, c, UTF_SIZ);
1304 term.line[y][x].state |= GLYPH_SET;
1305 }
1306
1307 void
1308 tclearregion(int x1, int y1, int x2, int y2, int bce) {
1309 int x, y, temp;
1310
1311 if(x1 > x2)
1312 temp = x1, x1 = x2, x2 = temp;
1313 if(y1 > y2)
1314 temp = y1, y1 = y2, y2 = temp;
1315
1316 LIMIT(x1, 0, term.col-1);
1317 LIMIT(x2, 0, term.col-1);
1318 LIMIT(y1, 0, term.row-1);
1319 LIMIT(y2, 0, term.row-1);
1320
1321 for(y = y1; y <= y2; y++) {
1322 term.dirty[y] = 1;
1323 for(x = x1; x <= x2; x++) {
1324 if(bce) {
1325 term.line[y][x] = term.c.attr;
1326 memcpy(term.line[y][x].c, " ", 2);
1327 term.line[y][x].state |= GLYPH_SET;
1328 } else {
1329 term.line[y][x].state = 0;
1330 }
1331 }
1332 }
1333 }
1334
1335 void
1336 tdeletechar(int n) {
1337 int src = term.c.x + n;
1338 int dst = term.c.x;
1339 int size = term.col - src;
1340
1341 term.dirty[term.c.y] = 1;
1342
1343 if(src >= term.col) {
1344 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1345 return;
1346 }
1347
1348 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1349 size * sizeof(Glyph));
1350 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y, 0);
1351 }
1352
1353 void
1354 tinsertblank(int n) {
1355 int src = term.c.x;
1356 int dst = src + n;
1357 int size = term.col - dst;
1358
1359 term.dirty[term.c.y] = 1;
1360
1361 if(dst >= term.col) {
1362 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1363 return;
1364 }
1365
1366 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1367 size * sizeof(Glyph));
1368 tclearregion(src, term.c.y, dst - 1, term.c.y, 0);
1369 }
1370
1371 void
1372 tinsertblankline(int n) {
1373 if(term.c.y < term.top || term.c.y > term.bot)
1374 return;
1375
1376 tscrolldown(term.c.y, n);
1377 }
1378
1379 void
1380 tdeleteline(int n) {
1381 if(term.c.y < term.top || term.c.y > term.bot)
1382 return;
1383
1384 tscrollup(term.c.y, n);
1385 }
1386
1387 void
1388 tsetattr(int *attr, int l) {
1389 int i;
1390
1391 for(i = 0; i < l; i++) {
1392 switch(attr[i]) {
1393 case 0:
1394 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1395 | ATTR_ITALIC | ATTR_BLINK);
1396 term.c.attr.fg = defaultfg;
1397 term.c.attr.bg = defaultbg;
1398 break;
1399 case 1:
1400 term.c.attr.mode |= ATTR_BOLD;
1401 break;
1402 case 3:
1403 term.c.attr.mode |= ATTR_ITALIC;
1404 break;
1405 case 4:
1406 term.c.attr.mode |= ATTR_UNDERLINE;
1407 break;
1408 case 5:
1409 term.c.attr.mode |= ATTR_BLINK;
1410 break;
1411 case 7:
1412 term.c.attr.mode |= ATTR_REVERSE;
1413 break;
1414 case 21:
1415 case 22:
1416 term.c.attr.mode &= ~ATTR_BOLD;
1417 break;
1418 case 23:
1419 term.c.attr.mode &= ~ATTR_ITALIC;
1420 break;
1421 case 24:
1422 term.c.attr.mode &= ~ATTR_UNDERLINE;
1423 break;
1424 case 25:
1425 term.c.attr.mode &= ~ATTR_BLINK;
1426 break;
1427 case 27:
1428 term.c.attr.mode &= ~ATTR_REVERSE;
1429 break;
1430 case 38:
1431 if(i + 2 < l && attr[i + 1] == 5) {
1432 i += 2;
1433 if(BETWEEN(attr[i], 0, 255)) {
1434 term.c.attr.fg = attr[i];
1435 } else {
1436 fprintf(stderr,
1437 "erresc: bad fgcolor %d\n",
1438 attr[i]);
1439 }
1440 } else {
1441 fprintf(stderr,
1442 "erresc(38): gfx attr %d unknown\n",
1443 attr[i]);
1444 }
1445 break;
1446 case 39:
1447 term.c.attr.fg = defaultfg;
1448 break;
1449 case 48:
1450 if(i + 2 < l && attr[i + 1] == 5) {
1451 i += 2;
1452 if(BETWEEN(attr[i], 0, 255)) {
1453 term.c.attr.bg = attr[i];
1454 } else {
1455 fprintf(stderr,
1456 "erresc: bad bgcolor %d\n",
1457 attr[i]);
1458 }
1459 } else {
1460 fprintf(stderr,
1461 "erresc(48): gfx attr %d unknown\n",
1462 attr[i]);
1463 }
1464 break;
1465 case 49:
1466 term.c.attr.bg = defaultbg;
1467 break;
1468 default:
1469 if(BETWEEN(attr[i], 30, 37)) {
1470 term.c.attr.fg = attr[i] - 30;
1471 } else if(BETWEEN(attr[i], 40, 47)) {
1472 term.c.attr.bg = attr[i] - 40;
1473 } else if(BETWEEN(attr[i], 90, 97)) {
1474 term.c.attr.fg = attr[i] - 90 + 8;
1475 } else if(BETWEEN(attr[i], 100, 107)) {
1476 term.c.attr.bg = attr[i] - 100 + 8;
1477 } else {
1478 fprintf(stderr,
1479 "erresc(default): gfx attr %d unknown\n",
1480 attr[i]), csidump();
1481 }
1482 break;
1483 }
1484 }
1485 }
1486
1487 void
1488 tsetscroll(int t, int b) {
1489 int temp;
1490
1491 LIMIT(t, 0, term.row-1);
1492 LIMIT(b, 0, term.row-1);
1493 if(t > b) {
1494 temp = t;
1495 t = b;
1496 b = temp;
1497 }
1498 term.top = t;
1499 term.bot = b;
1500 }
1501
1502 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1503
1504 void
1505 tsetmode(bool priv, bool set, int *args, int narg) {
1506 int *lim, mode;
1507 bool alt;
1508
1509 for(lim = args + narg; args < lim; ++args) {
1510 if(priv) {
1511 switch(*args) {
1512 break;
1513 case 1: /* DECCKM -- Cursor key */
1514 MODBIT(term.mode, set, MODE_APPCURSOR);
1515 break;
1516 case 5: /* DECSCNM -- Reverse video */
1517 mode = term.mode;
1518 MODBIT(term.mode, set, MODE_REVERSE);
1519 if(mode != term.mode)
1520 redraw(REDRAW_TIMEOUT);
1521 break;
1522 case 6: /* DECOM -- Origin */
1523 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1524 tmoveato(0, 0);
1525 break;
1526 case 7: /* DECAWM -- Auto wrap */
1527 MODBIT(term.mode, set, MODE_WRAP);
1528 break;
1529 case 0: /* Error (IGNORED) */
1530 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1531 case 3: /* DECCOLM -- Column (IGNORED) */
1532 case 4: /* DECSCLM -- Scroll (IGNORED) */
1533 case 8: /* DECARM -- Auto repeat (IGNORED) */
1534 case 18: /* DECPFF -- Printer feed (IGNORED) */
1535 case 19: /* DECPEX -- Printer extent (IGNORED) */
1536 case 42: /* DECNRCM -- National characters (IGNORED) */
1537 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1538 break;
1539 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1540 MODBIT(term.mode, !set, MODE_HIDE);
1541 break;
1542 case 1000: /* 1000,1002: enable xterm mouse report */
1543 MODBIT(term.mode, set, MODE_MOUSEBTN);
1544 break;
1545 case 1002:
1546 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1547 break;
1548 case 1049: /* = 1047 and 1048 */
1549 case 47:
1550 case 1047: {
1551 alt = IS_SET(MODE_ALTSCREEN);
1552 if(alt) {
1553 tclearregion(0, 0, term.col-1,
1554 term.row-1, 0);
1555 }
1556 if(set ^ alt) /* set is always 1 or 0 */
1557 tswapscreen();
1558 if(*args != 1049)
1559 break;
1560 }
1561 /* pass through */
1562 case 1048:
1563 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1564 break;
1565 default:
1566 fprintf(stderr,
1567 "erresc: unknown private set/reset mode %d\n",
1568 *args);
1569 break;
1570 }
1571 } else {
1572 switch(*args) {
1573 case 0: /* Error (IGNORED) */
1574 break;
1575 case 2: /* KAM -- keyboard action */
1576 MODBIT(term.mode, set, MODE_KBDLOCK);
1577 break;
1578 case 4: /* IRM -- Insertion-replacement */
1579 MODBIT(term.mode, set, MODE_INSERT);
1580 break;
1581 case 12: /* SRM -- Send/Receive */
1582 MODBIT(term.mode, !set, MODE_ECHO);
1583 break;
1584 case 20: /* LNM -- Linefeed/new line */
1585 MODBIT(term.mode, set, MODE_CRLF);
1586 break;
1587 default:
1588 fprintf(stderr,
1589 "erresc: unknown set/reset mode %d\n",
1590 *args);
1591 break;
1592 }
1593 }
1594 }
1595 }
1596 #undef MODBIT
1597
1598
1599 void
1600 csihandle(void) {
1601 switch(csiescseq.mode) {
1602 default:
1603 unknown:
1604 fprintf(stderr, "erresc: unknown csi ");
1605 csidump();
1606 /* die(""); */
1607 break;
1608 case '@': /* ICH -- Insert <n> blank char */
1609 DEFAULT(csiescseq.arg[0], 1);
1610 tinsertblank(csiescseq.arg[0]);
1611 break;
1612 case 'A': /* CUU -- Cursor <n> Up */
1613 DEFAULT(csiescseq.arg[0], 1);
1614 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1615 break;
1616 case 'B': /* CUD -- Cursor <n> Down */
1617 case 'e': /* VPR --Cursor <n> Down */
1618 DEFAULT(csiescseq.arg[0], 1);
1619 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1620 break;
1621 case 'c': /* DA -- Device Attributes */
1622 if(csiescseq.arg[0] == 0)
1623 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1624 break;
1625 case 'C': /* CUF -- Cursor <n> Forward */
1626 case 'a': /* HPR -- Cursor <n> Forward */
1627 DEFAULT(csiescseq.arg[0], 1);
1628 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1629 break;
1630 case 'D': /* CUB -- Cursor <n> Backward */
1631 DEFAULT(csiescseq.arg[0], 1);
1632 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1633 break;
1634 case 'E': /* CNL -- Cursor <n> Down and first col */
1635 DEFAULT(csiescseq.arg[0], 1);
1636 tmoveto(0, term.c.y+csiescseq.arg[0]);
1637 break;
1638 case 'F': /* CPL -- Cursor <n> Up and first col */
1639 DEFAULT(csiescseq.arg[0], 1);
1640 tmoveto(0, term.c.y-csiescseq.arg[0]);
1641 break;
1642 case 'g': /* TBC -- Tabulation clear */
1643 switch (csiescseq.arg[0]) {
1644 case 0: /* clear current tab stop */
1645 term.tabs[term.c.x] = 0;
1646 break;
1647 case 3: /* clear all the tabs */
1648 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1649 break;
1650 default:
1651 goto unknown;
1652 }
1653 break;
1654 case 'G': /* CHA -- Move to <col> */
1655 case '`': /* HPA */
1656 DEFAULT(csiescseq.arg[0], 1);
1657 tmoveto(csiescseq.arg[0]-1, term.c.y);
1658 break;
1659 case 'H': /* CUP -- Move to <row> <col> */
1660 case 'f': /* HVP */
1661 DEFAULT(csiescseq.arg[0], 1);
1662 DEFAULT(csiescseq.arg[1], 1);
1663 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1664 break;
1665 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1666 DEFAULT(csiescseq.arg[0], 1);
1667 while(csiescseq.arg[0]--)
1668 tputtab(1);
1669 break;
1670 case 'J': /* ED -- Clear screen */
1671 sel.bx = -1;
1672 switch(csiescseq.arg[0]) {
1673 case 0: /* below */
1674 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 1);
1675 if(term.c.y < term.row-1) {
1676 tclearregion(0, term.c.y+1, term.col-1,
1677 term.row-1, 1);
1678 }
1679 break;
1680 case 1: /* above */
1681 if(term.c.y > 1)
1682 tclearregion(0, 0, term.col-1, term.c.y-1, 1);
1683 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1684 break;
1685 case 2: /* all */
1686 tclearregion(0, 0, term.col-1, term.row-1, 1);
1687 break;
1688 default:
1689 goto unknown;
1690 }
1691 break;
1692 case 'K': /* EL -- Clear line */
1693 switch(csiescseq.arg[0]) {
1694 case 0: /* right */
1695 tclearregion(term.c.x, term.c.y, term.col-1,
1696 term.c.y, 1);
1697 break;
1698 case 1: /* left */
1699 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1700 break;
1701 case 2: /* all */
1702 tclearregion(0, term.c.y, term.col-1, term.c.y, 1);
1703 break;
1704 }
1705 break;
1706 case 'S': /* SU -- Scroll <n> line up */
1707 DEFAULT(csiescseq.arg[0], 1);
1708 tscrollup(term.top, csiescseq.arg[0]);
1709 break;
1710 case 'T': /* SD -- Scroll <n> line down */
1711 DEFAULT(csiescseq.arg[0], 1);
1712 tscrolldown(term.top, csiescseq.arg[0]);
1713 break;
1714 case 'L': /* IL -- Insert <n> blank lines */
1715 DEFAULT(csiescseq.arg[0], 1);
1716 tinsertblankline(csiescseq.arg[0]);
1717 break;
1718 case 'l': /* RM -- Reset Mode */
1719 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1720 break;
1721 case 'M': /* DL -- Delete <n> lines */
1722 DEFAULT(csiescseq.arg[0], 1);
1723 tdeleteline(csiescseq.arg[0]);
1724 break;
1725 case 'X': /* ECH -- Erase <n> char */
1726 DEFAULT(csiescseq.arg[0], 1);
1727 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0],
1728 term.c.y, 0);
1729 break;
1730 case 'P': /* DCH -- Delete <n> char */
1731 DEFAULT(csiescseq.arg[0], 1);
1732 tdeletechar(csiescseq.arg[0]);
1733 break;
1734 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1735 DEFAULT(csiescseq.arg[0], 1);
1736 while(csiescseq.arg[0]--)
1737 tputtab(0);
1738 break;
1739 case 'd': /* VPA -- Move to <row> */
1740 DEFAULT(csiescseq.arg[0], 1);
1741 tmoveato(term.c.x, csiescseq.arg[0]-1);
1742 break;
1743 case 'h': /* SM -- Set terminal mode */
1744 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1745 break;
1746 case 'm': /* SGR -- Terminal attribute (color) */
1747 tsetattr(csiescseq.arg, csiescseq.narg);
1748 break;
1749 case 'r': /* DECSTBM -- Set Scrolling Region */
1750 if(csiescseq.priv) {
1751 goto unknown;
1752 } else {
1753 DEFAULT(csiescseq.arg[0], 1);
1754 DEFAULT(csiescseq.arg[1], term.row);
1755 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1756 tmoveato(0, 0);
1757 }
1758 break;
1759 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1760 tcursor(CURSOR_SAVE);
1761 break;
1762 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1763 tcursor(CURSOR_LOAD);
1764 break;
1765 }
1766 }
1767
1768 void
1769 csidump(void) {
1770 int i;
1771 uint c;
1772
1773 printf("ESC[");
1774 for(i = 0; i < csiescseq.len; i++) {
1775 c = csiescseq.buf[i] & 0xff;
1776 if(isprint(c)) {
1777 putchar(c);
1778 } else if(c == '\n') {
1779 printf("(\\n)");
1780 } else if(c == '\r') {
1781 printf("(\\r)");
1782 } else if(c == 0x1b) {
1783 printf("(\\e)");
1784 } else {
1785 printf("(%02x)", c);
1786 }
1787 }
1788 putchar('\n');
1789 }
1790
1791 void
1792 csireset(void) {
1793 memset(&csiescseq, 0, sizeof(csiescseq));
1794 }
1795
1796 void
1797 strhandle(void) {
1798 char *p;
1799
1800 /*
1801 * TODO: make this being useful in case of color palette change.
1802 */
1803 strparse();
1804
1805 p = strescseq.buf;
1806
1807 switch(strescseq.type) {
1808 case ']': /* OSC -- Operating System Command */
1809 switch(p[0]) {
1810 case '0':
1811 case '1':
1812 case '2':
1813 /*
1814 * TODO: Handle special chars in string, like umlauts.
1815 */
1816 if(p[1] == ';') {
1817 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1818 }
1819 break;
1820 case ';':
1821 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1822 break;
1823 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1824 break;
1825 default:
1826 fprintf(stderr, "erresc: unknown str ");
1827 strdump();
1828 break;
1829 }
1830 break;
1831 case 'k': /* old title set compatibility */
1832 XStoreName(xw.dpy, xw.win, strescseq.buf);
1833 break;
1834 case 'P': /* DSC -- Device Control String */
1835 case '_': /* APC -- Application Program Command */
1836 case '^': /* PM -- Privacy Message */
1837 default:
1838 fprintf(stderr, "erresc: unknown str ");
1839 strdump();
1840 /* die(""); */
1841 break;
1842 }
1843 }
1844
1845 void
1846 strparse(void) {
1847 /*
1848 * TODO: Implement parsing like for CSI when required.
1849 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1850 */
1851 return;
1852 }
1853
1854 void
1855 strdump(void) {
1856 int i;
1857 uint c;
1858
1859 printf("ESC%c", strescseq.type);
1860 for(i = 0; i < strescseq.len; i++) {
1861 c = strescseq.buf[i] & 0xff;
1862 if(isprint(c)) {
1863 putchar(c);
1864 } else if(c == '\n') {
1865 printf("(\\n)");
1866 } else if(c == '\r') {
1867 printf("(\\r)");
1868 } else if(c == 0x1b) {
1869 printf("(\\e)");
1870 } else {
1871 printf("(%02x)", c);
1872 }
1873 }
1874 printf("ESC\\\n");
1875 }
1876
1877 void
1878 strreset(void) {
1879 memset(&strescseq, 0, sizeof(strescseq));
1880 }
1881
1882 void
1883 tputtab(bool forward) {
1884 uint x = term.c.x;
1885
1886 if(forward) {
1887 if(x == term.col)
1888 return;
1889 for(++x; x < term.col && !term.tabs[x]; ++x)
1890 /* nothing */ ;
1891 } else {
1892 if(x == 0)
1893 return;
1894 for(--x; x > 0 && !term.tabs[x]; --x)
1895 /* nothing */ ;
1896 }
1897 tmoveto(x, term.c.y);
1898 }
1899
1900 void
1901 techo(char *buf, int len) {
1902 for(; len > 0; buf++, len--) {
1903 char c = *buf;
1904
1905 if(c == '\033') { /* escape */
1906 tputc("^", 1);
1907 tputc("[", 1);
1908 } else if (c < '\x20') { /* control code */
1909 if(c != '\n' && c != '\r' && c != '\t') {
1910 c |= '\x40';
1911 tputc("^", 1);
1912 }
1913 tputc(&c, 1);
1914 } else {
1915 break;
1916 }
1917 }
1918 if (len)
1919 tputc(buf, len);
1920 }
1921
1922 void
1923 tputc(char *c, int len) {
1924 uchar ascii = *c;
1925 bool control = ascii < '\x20' || ascii == 0177;
1926
1927 if(iofd != -1) {
1928 if (xwrite(iofd, c, len) < 0) {
1929 fprintf(stderr, "Error writing in %s:%s\n",
1930 opt_io, strerror(errno));
1931 close(iofd);
1932 iofd = -1;
1933 }
1934 }
1935
1936 /*
1937 * STR sequences must be checked before anything else
1938 * because it can use some control codes as part of the sequence.
1939 */
1940 if(term.esc & ESC_STR) {
1941 switch(ascii) {
1942 case '\033':
1943 term.esc = ESC_START | ESC_STR_END;
1944 break;
1945 case '\a': /* backwards compatibility to xterm */
1946 term.esc = 0;
1947 strhandle();
1948 break;
1949 default:
1950 if(strescseq.len + len < sizeof(strescseq.buf)) {
1951 memmove(&strescseq.buf[strescseq.len], c, len);
1952 strescseq.len += len;
1953 } else {
1954 /*
1955 * Here is a bug in terminals. If the user never sends
1956 * some code to stop the str or esc command, then st
1957 * will stop responding. But this is better than
1958 * silently failing with unknown characters. At least
1959 * then users will report back.
1960 *
1961 * In the case users ever get fixed, here is the code:
1962 */
1963 /*
1964 * term.esc = 0;
1965 * strhandle();
1966 */
1967 }
1968 }
1969 return;
1970 }
1971
1972 /*
1973 * Actions of control codes must be performed as soon they arrive
1974 * because they can be embedded inside a control sequence, and
1975 * they must not cause conflicts with sequences.
1976 */
1977 if(control) {
1978 switch(ascii) {
1979 case '\t': /* HT */
1980 tputtab(1);
1981 return;
1982 case '\b': /* BS */
1983 tmoveto(term.c.x-1, term.c.y);
1984 return;
1985 case '\r': /* CR */
1986 tmoveto(0, term.c.y);
1987 return;
1988 case '\f': /* LF */
1989 case '\v': /* VT */
1990 case '\n': /* LF */
1991 /* go to first col if the mode is set */
1992 tnewline(IS_SET(MODE_CRLF));
1993 return;
1994 case '\a': /* BEL */
1995 if(!(xw.state & WIN_FOCUSED))
1996 xseturgency(1);
1997 return;
1998 case '\033': /* ESC */
1999 csireset();
2000 term.esc = ESC_START;
2001 return;
2002 case '\016': /* SO */
2003 case '\017': /* SI */
2004 /*
2005 * Different charsets are hard to handle. Applications
2006 * should use the right alt charset escapes for the
2007 * only reason they still exist: line drawing. The
2008 * rest is incompatible history st should not support.
2009 */
2010 return;
2011 case '\032': /* SUB */
2012 case '\030': /* CAN */
2013 csireset();
2014 return;
2015 case '\005': /* ENQ (IGNORED) */
2016 case '\000': /* NUL (IGNORED) */
2017 case '\021': /* XON (IGNORED) */
2018 case '\023': /* XOFF (IGNORED) */
2019 case 0177: /* DEL (IGNORED) */
2020 return;
2021 }
2022 } else if(term.esc & ESC_START) {
2023 if(term.esc & ESC_CSI) {
2024 csiescseq.buf[csiescseq.len++] = ascii;
2025 if(BETWEEN(ascii, 0x40, 0x7E)
2026 || csiescseq.len >= ESC_BUF_SIZ) {
2027 term.esc = 0;
2028 csiparse(), csihandle();
2029 }
2030 } else if(term.esc & ESC_STR_END) {
2031 term.esc = 0;
2032 if(ascii == '\\')
2033 strhandle();
2034 } else if(term.esc & ESC_ALTCHARSET) {
2035 switch(ascii) {
2036 case '0': /* Line drawing set */
2037 term.c.attr.mode |= ATTR_GFX;
2038 break;
2039 case 'B': /* USASCII */
2040 term.c.attr.mode &= ~ATTR_GFX;
2041 break;
2042 case 'A': /* UK (IGNORED) */
2043 case '<': /* multinational charset (IGNORED) */
2044 case '5': /* Finnish (IGNORED) */
2045 case 'C': /* Finnish (IGNORED) */
2046 case 'K': /* German (IGNORED) */
2047 break;
2048 default:
2049 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2050 }
2051 term.esc = 0;
2052 } else if(term.esc & ESC_TEST) {
2053 if(ascii == '8') { /* DEC screen alignment test. */
2054 char E[UTF_SIZ] = "E";
2055 int x, y;
2056
2057 for(x = 0; x < term.col; ++x) {
2058 for(y = 0; y < term.row; ++y)
2059 tsetchar(E, &term.c.attr, x, y);
2060 }
2061 }
2062 term.esc = 0;
2063 } else {
2064 switch(ascii) {
2065 case '[':
2066 term.esc |= ESC_CSI;
2067 break;
2068 case '#':
2069 term.esc |= ESC_TEST;
2070 break;
2071 case 'P': /* DCS -- Device Control String */
2072 case '_': /* APC -- Application Program Command */
2073 case '^': /* PM -- Privacy Message */
2074 case ']': /* OSC -- Operating System Command */
2075 case 'k': /* old title set compatibility */
2076 strreset();
2077 strescseq.type = ascii;
2078 term.esc |= ESC_STR;
2079 break;
2080 case '(': /* set primary charset G0 */
2081 term.esc |= ESC_ALTCHARSET;
2082 break;
2083 case ')': /* set secondary charset G1 (IGNORED) */
2084 case '*': /* set tertiary charset G2 (IGNORED) */
2085 case '+': /* set quaternary charset G3 (IGNORED) */
2086 term.esc = 0;
2087 break;
2088 case 'D': /* IND -- Linefeed */
2089 if(term.c.y == term.bot) {
2090 tscrollup(term.top, 1);
2091 } else {
2092 tmoveto(term.c.x, term.c.y+1);
2093 }
2094 term.esc = 0;
2095 break;
2096 case 'E': /* NEL -- Next line */
2097 tnewline(1); /* always go to first col */
2098 term.esc = 0;
2099 break;
2100 case 'H': /* HTS -- Horizontal tab stop */
2101 term.tabs[term.c.x] = 1;
2102 term.esc = 0;
2103 break;
2104 case 'M': /* RI -- Reverse index */
2105 if(term.c.y == term.top) {
2106 tscrolldown(term.top, 1);
2107 } else {
2108 tmoveto(term.c.x, term.c.y-1);
2109 }
2110 term.esc = 0;
2111 break;
2112 case 'Z': /* DECID -- Identify Terminal */
2113 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2114 term.esc = 0;
2115 break;
2116 case 'c': /* RIS -- Reset to inital state */
2117 treset();
2118 term.esc = 0;
2119 xresettitle();
2120 break;
2121 case '=': /* DECPAM -- Application keypad */
2122 term.mode |= MODE_APPKEYPAD;
2123 term.esc = 0;
2124 break;
2125 case '>': /* DECPNM -- Normal keypad */
2126 term.mode &= ~MODE_APPKEYPAD;
2127 term.esc = 0;
2128 break;
2129 case '7': /* DECSC -- Save Cursor */
2130 tcursor(CURSOR_SAVE);
2131 term.esc = 0;
2132 break;
2133 case '8': /* DECRC -- Restore Cursor */
2134 tcursor(CURSOR_LOAD);
2135 term.esc = 0;
2136 break;
2137 case '\\': /* ST -- Stop */
2138 term.esc = 0;
2139 break;
2140 default:
2141 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2142 (uchar) ascii, isprint(ascii)? ascii:'.');
2143 term.esc = 0;
2144 }
2145 }
2146 /*
2147 * All characters which form part of a sequence are not
2148 * printed
2149 */
2150 return;
2151 }
2152 /*
2153 * Display control codes only if we are in graphic mode
2154 */
2155 if(control && !(term.c.attr.mode & ATTR_GFX))
2156 return;
2157 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2158 sel.bx = -1;
2159 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2160 tnewline(1); /* always go to first col */
2161
2162 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2163 memmove(&term.line[term.c.y][term.c.x+1],
2164 &term.line[term.c.y][term.c.x],
2165 (term.col - term.c.x - 1) * sizeof(Glyph));
2166 }
2167
2168 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2169 if(term.c.x+1 < term.col) {
2170 tmoveto(term.c.x+1, term.c.y);
2171 } else {
2172 term.c.state |= CURSOR_WRAPNEXT;
2173 }
2174 }
2175
2176 int
2177 tresize(int col, int row) {
2178 int i, x;
2179 int minrow = MIN(row, term.row);
2180 int mincol = MIN(col, term.col);
2181 int slide = term.c.y - row + 1;
2182 bool *bp;
2183
2184 if(col < 1 || row < 1)
2185 return 0;
2186
2187 /* free unneeded rows */
2188 i = 0;
2189 if(slide > 0) {
2190 /* slide screen to keep cursor where we expect it -
2191 * tscrollup would work here, but we can optimize to
2192 * memmove because we're freeing the earlier lines */
2193 for(/* i = 0 */; i < slide; i++) {
2194 free(term.line[i]);
2195 free(term.alt[i]);
2196 }
2197 memmove(term.line, term.line + slide, row * sizeof(Line));
2198 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2199 }
2200 for(i += row; i < term.row; i++) {
2201 free(term.line[i]);
2202 free(term.alt[i]);
2203 }
2204
2205 /* resize to new height */
2206 term.line = xrealloc(term.line, row * sizeof(Line));
2207 term.alt = xrealloc(term.alt, row * sizeof(Line));
2208 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2209 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2210
2211 /* resize each row to new width, zero-pad if needed */
2212 for(i = 0; i < minrow; i++) {
2213 term.dirty[i] = 1;
2214 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2215 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2216 for(x = mincol; x < col; x++) {
2217 term.line[i][x].state = 0;
2218 term.alt[i][x].state = 0;
2219 }
2220 }
2221
2222 /* allocate any new rows */
2223 for(/* i == minrow */; i < row; i++) {
2224 term.dirty[i] = 1;
2225 term.line[i] = xcalloc(col, sizeof(Glyph));
2226 term.alt [i] = xcalloc(col, sizeof(Glyph));
2227 }
2228 if(col > term.col) {
2229 bp = term.tabs + term.col;
2230
2231 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2232 while(--bp > term.tabs && !*bp)
2233 /* nothing */ ;
2234 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2235 *bp = 1;
2236 }
2237 /* update terminal size */
2238 term.col = col;
2239 term.row = row;
2240 /* reset scrolling region */
2241 tsetscroll(0, row-1);
2242 /* make use of the LIMIT in tmoveto */
2243 tmoveto(term.c.x, term.c.y);
2244
2245 return (slide > 0);
2246 }
2247
2248 void
2249 xresize(int col, int row) {
2250 xw.tw = MAX(1, col * xw.cw);
2251 xw.th = MAX(1, row * xw.ch);
2252
2253 if(!usedbe) {
2254 XFreePixmap(xw.dpy, xw.buf);
2255 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2256 DefaultDepth(xw.dpy, xw.scr));
2257 XSetForeground(xw.dpy, dc.gc, 0);
2258 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2259 }
2260
2261 XftDrawChange(xw.draw, xw.buf);
2262 }
2263
2264 void
2265 xloadcols(void) {
2266 int i, r, g, b;
2267 XRenderColor color = { .alpha = 0 };
2268
2269 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2270 for(i = 0; i < LEN(colorname); i++) {
2271 if(!colorname[i])
2272 continue;
2273 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2274 die("Could not allocate color '%s'\n", colorname[i]);
2275 }
2276 }
2277
2278 /* load colors [16-255] ; same colors as xterm */
2279 for(i = 16, r = 0; r < 6; r++) {
2280 for(g = 0; g < 6; g++) {
2281 for(b = 0; b < 6; b++) {
2282 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
2283 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
2284 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
2285 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2286 die("Could not allocate color %d\n", i);
2287 }
2288 i++;
2289 }
2290 }
2291 }
2292
2293 for(r = 0; r < 24; r++, i++) {
2294 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2295 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2296 &dc.col[i])) {
2297 die("Could not allocate color %d\n", i);
2298 }
2299 }
2300 }
2301
2302 void
2303 xtermclear(int col1, int row1, int col2, int row2) {
2304 XftDrawRect(xw.draw,
2305 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2306 borderpx + col1 * xw.cw,
2307 borderpx + row1 * xw.ch,
2308 (col2-col1+1) * xw.cw,
2309 (row2-row1+1) * xw.ch);
2310 }
2311
2312 /*
2313 * Absolute coordinates.
2314 */
2315 void
2316 xclear(int x1, int y1, int x2, int y2) {
2317 XftDrawRect(xw.draw,
2318 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2319 x1, y1, x2-x1, y2-y1);
2320 }
2321
2322 void
2323 xhints(void) {
2324 XClassHint class = {opt_class ? opt_class : termname, termname};
2325 XWMHints wm = {.flags = InputHint, .input = 1};
2326 XSizeHints *sizeh = NULL;
2327
2328 sizeh = XAllocSizeHints();
2329 if(xw.isfixed == False) {
2330 sizeh->flags = PSize | PResizeInc | PBaseSize;
2331 sizeh->height = xw.h;
2332 sizeh->width = xw.w;
2333 sizeh->height_inc = xw.ch;
2334 sizeh->width_inc = xw.cw;
2335 sizeh->base_height = 2 * borderpx;
2336 sizeh->base_width = 2 * borderpx;
2337 } else {
2338 sizeh->flags = PMaxSize | PMinSize;
2339 sizeh->min_width = sizeh->max_width = xw.fw;
2340 sizeh->min_height = sizeh->max_height = xw.fh;
2341 }
2342
2343 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2344 XFree(sizeh);
2345 }
2346
2347 int
2348 xloadfont(Font *f, FcPattern *pattern) {
2349 FcPattern *match;
2350 FcResult result;
2351
2352 match = FcFontMatch(NULL, pattern, &result);
2353 if(!match)
2354 return 1;
2355
2356 if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
2357 FcPatternDestroy(match);
2358 return 1;
2359 }
2360
2361 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2362 FcPatternDestroy(match);
2363 return 1;
2364 }
2365
2366 f->pattern = FcPatternDuplicate(pattern);
2367
2368 f->ascent = f->match->ascent;
2369 f->descent = f->match->descent;
2370 f->lbearing = 0;
2371 f->rbearing = f->match->max_advance_width;
2372
2373 f->height = f->match->height;
2374 f->width = f->lbearing + f->rbearing;
2375
2376 return 0;
2377 }
2378
2379 void
2380 xloadfonts(char *fontstr, int fontsize) {
2381 FcPattern *pattern;
2382 FcResult result;
2383 double fontval;
2384
2385 if(fontstr[0] == '-') {
2386 pattern = XftXlfdParse(fontstr, False, False);
2387 } else {
2388 pattern = FcNameParse((FcChar8 *)fontstr);
2389 }
2390
2391 if(!pattern)
2392 die("st: can't open font %s\n", fontstr);
2393
2394 if(fontsize > 0) {
2395 FcPatternDel(pattern, FC_PIXEL_SIZE);
2396 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2397 usedfontsize = fontsize;
2398 } else {
2399 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2400 if(result == FcResultMatch) {
2401 usedfontsize = (int)fontval;
2402 } else {
2403 /*
2404 * Default font size is 12, if none given. This is to
2405 * have a known usedfontsize value.
2406 */
2407 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2408 usedfontsize = 12;
2409 }
2410 }
2411
2412 FcConfigSubstitute(0, pattern, FcMatchPattern);
2413 FcDefaultSubstitute(pattern);
2414
2415 if(xloadfont(&dc.font, pattern))
2416 die("st: can't open font %s\n", fontstr);
2417
2418 /* Setting character width and height. */
2419 xw.cw = dc.font.width;
2420 xw.ch = dc.font.height;
2421
2422 FcPatternDel(pattern, FC_WEIGHT);
2423 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2424 if(xloadfont(&dc.bfont, pattern))
2425 die("st: can't open font %s\n", fontstr);
2426
2427 FcPatternDel(pattern, FC_SLANT);
2428 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2429 if(xloadfont(&dc.ibfont, pattern))
2430 die("st: can't open font %s\n", fontstr);
2431
2432 FcPatternDel(pattern, FC_WEIGHT);
2433 if(xloadfont(&dc.ifont, pattern))
2434 die("st: can't open font %s\n", fontstr);
2435
2436 FcPatternDestroy(pattern);
2437 }
2438
2439 void
2440 xunloadfonts(void)
2441 {
2442 int i, ip;
2443
2444 /*
2445 * Free the loaded fonts in the font cache. This is done backwards
2446 * from the frccur.
2447 */
2448 for (i = 0, ip = frccur; i < frclen; i++, ip--) {
2449 if (ip < 0)
2450 ip = LEN(frc) - 1;
2451 XftFontClose(xw.dpy, frc[ip].font);
2452 }
2453 frccur = -1;
2454 frclen = 0;
2455
2456 XftFontClose(xw.dpy, dc.font.match);
2457 FcPatternDestroy(dc.font.pattern);
2458 FcFontSetDestroy(dc.font.set);
2459 XftFontClose(xw.dpy, dc.bfont.match);
2460 FcPatternDestroy(dc.bfont.pattern);
2461 FcFontSetDestroy(dc.bfont.set);
2462 XftFontClose(xw.dpy, dc.ifont.match);
2463 FcPatternDestroy(dc.ifont.pattern);
2464 FcFontSetDestroy(dc.ifont.set);
2465 XftFontClose(xw.dpy, dc.ibfont.match);
2466 FcPatternDestroy(dc.ibfont.pattern);
2467 FcFontSetDestroy(dc.ibfont.set);
2468 }
2469
2470 void
2471 xzoom(const Arg *arg)
2472 {
2473 xunloadfonts();
2474 xloadfonts(usedfont, usedfontsize + arg->i);
2475 cresize(0, 0);
2476 redraw(0);
2477 }
2478
2479 void
2480 xinit(void) {
2481 XSetWindowAttributes attrs;
2482 Cursor cursor;
2483 Window parent;
2484 int sw, sh, major, minor;
2485
2486 if(!(xw.dpy = XOpenDisplay(NULL)))
2487 die("Can't open display\n");
2488 xw.scr = XDefaultScreen(xw.dpy);
2489 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2490
2491 /* font */
2492 if (!FcInit())
2493 die("Could not init fontconfig.\n");
2494
2495 usedfont = (opt_font == NULL)? font : opt_font;
2496 xloadfonts(usedfont, 0);
2497
2498 /* colors */
2499 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2500 xloadcols();
2501
2502 /* adjust fixed window geometry */
2503 if(xw.isfixed) {
2504 sw = DisplayWidth(xw.dpy, xw.scr);
2505 sh = DisplayHeight(xw.dpy, xw.scr);
2506 if(xw.fx < 0)
2507 xw.fx = sw + xw.fx - xw.fw - 1;
2508 if(xw.fy < 0)
2509 xw.fy = sh + xw.fy - xw.fh - 1;
2510
2511 xw.h = xw.fh;
2512 xw.w = xw.fw;
2513 } else {
2514 /* window - default size */
2515 xw.h = 2 * borderpx + term.row * xw.ch;
2516 xw.w = 2 * borderpx + term.col * xw.cw;
2517 xw.fx = 0;
2518 xw.fy = 0;
2519 }
2520
2521 /* Events */
2522 attrs.background_pixel = dc.col[defaultbg].pixel;
2523 attrs.border_pixel = dc.col[defaultbg].pixel;
2524 attrs.bit_gravity = NorthWestGravity;
2525 attrs.event_mask = FocusChangeMask | KeyPressMask
2526 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2527 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2528 attrs.colormap = xw.cmap;
2529
2530 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2531 XRootWindow(xw.dpy, xw.scr);
2532 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2533 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2534 xw.vis,
2535 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2536 | CWColormap,
2537 &attrs);
2538
2539 /* double buffering */
2540 /*
2541 if(XdbeQueryExtension(xw.dpy, &major, &minor)) {
2542 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win,
2543 XdbeBackground);
2544 usedbe = True;
2545 } else {
2546 */
2547 dc.gc = XCreateGC(xw.dpy, parent, 0, 0);
2548 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2549 DefaultDepth(xw.dpy, xw.scr));
2550 XSetForeground(xw.dpy, dc.gc, 0);
2551 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2552 //xw.buf = xw.win;
2553 /*
2554 }
2555 */
2556
2557 /* Xft rendering context */
2558 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2559
2560 /* input methods */
2561 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2562 XSetLocaleModifiers("@im=local");
2563 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2564 XSetLocaleModifiers("@im=");
2565 if((xw.xim = XOpenIM(xw.dpy,
2566 NULL, NULL, NULL)) == NULL) {
2567 die("XOpenIM failed. Could not open input"
2568 " device.\n");
2569 }
2570 }
2571 }
2572 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2573 | XIMStatusNothing, XNClientWindow, xw.win,
2574 XNFocusWindow, xw.win, NULL);
2575 if(xw.xic == NULL)
2576 die("XCreateIC failed. Could not obtain input method.\n");
2577
2578 /* white cursor, black outline */
2579 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2580 XDefineCursor(xw.dpy, xw.win, cursor);
2581 XRecolorCursor(xw.dpy, cursor,
2582 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2583 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2584
2585 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2586 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2587 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2588
2589 xresettitle();
2590 XMapWindow(xw.dpy, xw.win);
2591 xhints();
2592 XSync(xw.dpy, 0);
2593 }
2594
2595 void
2596 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2597 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2598 width = charlen * xw.cw, xp, i;
2599 int frp, frcflags;
2600 int u8fl, u8fblen, u8cblen, doesexist;
2601 char *u8c, *u8fs;
2602 long u8char;
2603 Font *font = &dc.font;
2604 FcResult fcres;
2605 FcPattern *fcpattern, *fontpattern;
2606 FcFontSet *fcsets[] = { NULL };
2607 FcCharSet *fccharset;
2608 Colour *fg = &dc.col[base.fg], *bg = &dc.col[base.bg],
2609 *temp, revfg, revbg;
2610 XRenderColor colfg, colbg;
2611
2612 frcflags = FRC_NORMAL;
2613
2614 if(base.mode & ATTR_BOLD) {
2615 if(BETWEEN(base.fg, 0, 7)) {
2616 /* basic system colors */
2617 fg = &dc.col[base.fg + 8];
2618 } else if(BETWEEN(base.fg, 16, 195)) {
2619 /* 256 colors */
2620 fg = &dc.col[base.fg + 36];
2621 } else if(BETWEEN(base.fg, 232, 251)) {
2622 /* greyscale */
2623 fg = &dc.col[base.fg + 4];
2624 }
2625 /*
2626 * Those ranges will not be brightened:
2627 * 8 - 15 – bright system colors
2628 * 196 - 231 – highest 256 color cube
2629 * 252 - 255 – brightest colors in greyscale
2630 */
2631 font = &dc.bfont;
2632 frcflags = FRC_BOLD;
2633 }
2634
2635 if(base.mode & ATTR_ITALIC) {
2636 font = &dc.ifont;
2637 frcflags = FRC_ITALIC;
2638 }
2639 if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2640 font = &dc.ibfont;
2641 frcflags = FRC_ITALICBOLD;
2642 }
2643
2644 if(IS_SET(MODE_REVERSE)) {
2645 if(fg == &dc.col[defaultfg]) {
2646 fg = &dc.col[defaultbg];
2647 } else {
2648 colfg.red = ~fg->color.red;
2649 colfg.green = ~fg->color.green;
2650 colfg.blue = ~fg->color.blue;
2651 colfg.alpha = fg->color.alpha;
2652 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2653 fg = &revfg;
2654 }
2655
2656 if(bg == &dc.col[defaultbg]) {
2657 bg = &dc.col[defaultfg];
2658 } else {
2659 colbg.red = ~bg->color.red;
2660 colbg.green = ~bg->color.green;
2661 colbg.blue = ~bg->color.blue;
2662 colbg.alpha = bg->color.alpha;
2663 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2664 bg = &revbg;
2665 }
2666 }
2667
2668 if(base.mode & ATTR_REVERSE) {
2669 temp = fg;
2670 fg = bg;
2671 bg = temp;
2672 }
2673
2674 /* Intelligent cleaning up of the borders. */
2675 if(x == 0) {
2676 xclear(0, (y == 0)? 0 : winy, borderpx,
2677 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2678 }
2679 if(x + charlen >= term.col) {
2680 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2681 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2682 }
2683 if(y == 0)
2684 xclear(winx, 0, winx + width, borderpx);
2685 if(y == term.row-1)
2686 xclear(winx, winy + xw.ch, winx + width, xw.h);
2687
2688 /* Clean up the region we want to draw to. */
2689 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2690
2691 fcsets[0] = font->set;
2692 for (xp = winx; bytelen > 0;) {
2693 /*
2694 * Search for the range in the to be printed string of glyphs
2695 * that are in the main font. Then print that range. If
2696 * some glyph is found that is not in the font, do the
2697 * fallback dance.
2698 */
2699 u8fs = s;
2700 u8fblen = 0;
2701 u8fl = 0;
2702 for (;;) {
2703 u8c = s;
2704 u8cblen = utf8decode(s, &u8char);
2705 s += u8cblen;
2706 bytelen -= u8cblen;
2707
2708 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
2709 if (!doesexist || bytelen <= 0) {
2710 if (bytelen <= 0) {
2711 if (doesexist) {
2712 u8fl++;
2713 u8fblen += u8cblen;
2714 }
2715 }
2716
2717 if (u8fl > 0) {
2718 XftDrawStringUtf8(xw.draw, fg,
2719 font->match, xp,
2720 winy + font->ascent,
2721 (FcChar8 *)u8fs,
2722 u8fblen);
2723 xp += font->width * u8fl;
2724 }
2725 break;
2726 }
2727
2728 u8fl++;
2729 u8fblen += u8cblen;
2730 }
2731 if (doesexist)
2732 break;
2733
2734 frp = frccur;
2735 /* Search the font cache. */
2736 for (i = 0; i < frclen; i++, frp--) {
2737 if (frp <= 0)
2738 frp = LEN(frc) - 1;
2739
2740 if (frc[frp].c == u8char
2741 && frc[frp].flags == frcflags) {
2742 break;
2743 }
2744 }
2745
2746 /* Nothing was found. */
2747 if (i >= frclen) {
2748 /*
2749 * Nothing was found in the cache. Now use
2750 * some dozen of Fontconfig calls to get the
2751 * font for one single character.
2752 */
2753 fcpattern = FcPatternDuplicate(font->pattern);
2754 fccharset = FcCharSetCreate();
2755
2756 FcCharSetAddChar(fccharset, u8char);
2757 FcPatternAddCharSet(fcpattern, FC_CHARSET,
2758 fccharset);
2759 FcPatternAddBool(fcpattern, FC_SCALABLE,
2760 FcTrue);
2761
2762 FcConfigSubstitute(0, fcpattern,
2763 FcMatchPattern);
2764 FcDefaultSubstitute(fcpattern);
2765
2766 fontpattern = FcFontSetMatch(0, fcsets,
2767 FcTrue, fcpattern, &fcres);
2768
2769 /*
2770 * Overwrite or create the new cache entry
2771 * entry.
2772 */
2773 frccur++;
2774 frclen++;
2775 if (frccur >= LEN(frc))
2776 frccur = 0;
2777 if (frclen > LEN(frc)) {
2778 frclen = LEN(frc);
2779 XftFontClose(xw.dpy, frc[frccur].font);
2780 }
2781
2782 frc[frccur].font = XftFontOpenPattern(xw.dpy,
2783 fontpattern);
2784 frc[frccur].c = u8char;
2785 frc[frccur].flags = frcflags;
2786
2787 FcPatternDestroy(fcpattern);
2788 FcCharSetDestroy(fccharset);
2789
2790 frp = frccur;
2791 }
2792
2793 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
2794 xp, winy + frc[frp].font->ascent,
2795 (FcChar8 *)u8c, u8cblen);
2796
2797 xp += font->width;
2798 }
2799
2800 /*
2801 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
2802 winy + font->ascent, (FcChar8 *)s, bytelen);
2803 */
2804
2805 if(base.mode & ATTR_UNDERLINE) {
2806 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
2807 width, 1);
2808 }
2809 }
2810
2811 void
2812 xdrawcursor(void) {
2813 static int oldx = 0, oldy = 0;
2814 int sl;
2815 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs, 0};
2816
2817 LIMIT(oldx, 0, term.col-1);
2818 LIMIT(oldy, 0, term.row-1);
2819
2820 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2821 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2822
2823 /* remove the old cursor */
2824 if(term.line[oldy][oldx].state & GLYPH_SET) {
2825 sl = utf8size(term.line[oldy][oldx].c);
2826 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2827 oldy, 1, sl);
2828 } else {
2829 xtermclear(oldx, oldy, oldx, oldy);
2830 }
2831
2832 /* draw the new one */
2833 if(!(IS_SET(MODE_HIDE))) {
2834 if(!(xw.state & WIN_FOCUSED))
2835 g.bg = defaultucs;
2836
2837 if(IS_SET(MODE_REVERSE))
2838 g.mode |= ATTR_REVERSE, g.fg = defaultcs, g.bg = defaultfg;
2839
2840 sl = utf8size(g.c);
2841 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2842 oldx = term.c.x, oldy = term.c.y;
2843 }
2844 }
2845
2846 void
2847 xresettitle(void) {
2848 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
2849 }
2850
2851 void
2852 redraw(int timeout) {
2853 struct timespec tv = {0, timeout * 1000};
2854
2855 tfulldirt();
2856 draw();
2857
2858 if(timeout > 0) {
2859 nanosleep(&tv, NULL);
2860 XSync(xw.dpy, False); /* necessary for a good tput flash */
2861 }
2862 }
2863
2864 void
2865 draw(void) {
2866 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2867
2868 drawregion(0, 0, term.col, term.row);
2869 if(usedbe) {
2870 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2871 } else {
2872 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
2873 xw.h, 0, 0);
2874 XSetForeground(xw.dpy, dc.gc, 0);
2875 XSync(xw.dpy, False);
2876 }
2877 }
2878
2879 void
2880 drawregion(int x1, int y1, int x2, int y2) {
2881 int ic, ib, x, y, ox, sl;
2882 Glyph base, new;
2883 char buf[DRAW_BUF_SIZ];
2884 bool ena_sel = sel.bx != -1;
2885
2886 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
2887 ena_sel = 0;
2888
2889 if(!(xw.state & WIN_VISIBLE))
2890 return;
2891
2892 for(y = y1; y < y2; y++) {
2893 if(!term.dirty[y])
2894 continue;
2895
2896 xtermclear(0, y, term.col, y);
2897 term.dirty[y] = 0;
2898 base = term.line[y][0];
2899 ic = ib = ox = 0;
2900 for(x = x1; x < x2; x++) {
2901 new = term.line[y][x];
2902 if(ena_sel && *(new.c) && selected(x, y))
2903 new.mode ^= ATTR_REVERSE;
2904 if(ib > 0 && (!(new.state & GLYPH_SET)
2905 || ATTRCMP(base, new)
2906 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2907 xdraws(buf, base, ox, y, ic, ib);
2908 ic = ib = 0;
2909 }
2910 if(new.state & GLYPH_SET) {
2911 if(ib == 0) {
2912 ox = x;
2913 base = new;
2914 }
2915
2916 sl = utf8size(new.c);
2917 memcpy(buf+ib, new.c, sl);
2918 ib += sl;
2919 ++ic;
2920 }
2921 }
2922 if(ib > 0)
2923 xdraws(buf, base, ox, y, ic, ib);
2924 }
2925 xdrawcursor();
2926 }
2927
2928 void
2929 expose(XEvent *ev) {
2930 XExposeEvent *e = &ev->xexpose;
2931
2932 if(xw.state & WIN_REDRAW) {
2933 if(!e->count)
2934 xw.state &= ~WIN_REDRAW;
2935 }
2936 redraw(0);
2937 }
2938
2939 void
2940 visibility(XEvent *ev) {
2941 XVisibilityEvent *e = &ev->xvisibility;
2942
2943 if(e->state == VisibilityFullyObscured) {
2944 xw.state &= ~WIN_VISIBLE;
2945 } else if(!(xw.state & WIN_VISIBLE)) {
2946 /* need a full redraw for next Expose, not just a buf copy */
2947 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2948 }
2949 }
2950
2951 void
2952 unmap(XEvent *ev) {
2953 xw.state &= ~WIN_VISIBLE;
2954 }
2955
2956 void
2957 xseturgency(int add) {
2958 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2959
2960 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2961 XSetWMHints(xw.dpy, xw.win, h);
2962 XFree(h);
2963 }
2964
2965 void
2966 focus(XEvent *ev) {
2967 if(ev->type == FocusIn) {
2968 XSetICFocus(xw.xic);
2969 xw.state |= WIN_FOCUSED;
2970 xseturgency(0);
2971 } else {
2972 XUnsetICFocus(xw.xic);
2973 xw.state &= ~WIN_FOCUSED;
2974 }
2975 }
2976
2977 inline bool
2978 match(uint mask, uint state) {
2979 if(mask == XK_NO_MOD && state)
2980 return false;
2981 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
2982 return false;
2983 if((state & mask) != state)
2984 return false;
2985 return true;
2986 }
2987
2988 void
2989 numlock(const Arg *dummy) {
2990 term.numlock ^= 1;
2991 }
2992
2993 char*
2994 kmap(KeySym k, uint state) {
2995 uint mask;
2996 Key *kp;
2997 int i;
2998
2999 /* Check for mapped keys out of X11 function keys. */
3000 for(i = 0; i < LEN(mappedkeys); i++) {
3001 if(mappedkeys[i] == k)
3002 break;
3003 }
3004 if(i == LEN(mappedkeys)) {
3005 if((k & 0xFFFF) < 0xFD00)
3006 return NULL;
3007 }
3008
3009 for(kp = key; kp < key + LEN(key); kp++) {
3010 mask = kp->mask;
3011
3012 if(kp->k != k)
3013 continue;
3014
3015 if(!match(mask, state))
3016 continue;
3017
3018 if(kp->appkey > 0) {
3019 if(!IS_SET(MODE_APPKEYPAD))
3020 continue;
3021 if(term.numlock && kp->appkey == 2)
3022 continue;
3023 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3024 continue;
3025 }
3026
3027 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3028 (kp->appcursor > 0
3029 && !IS_SET(MODE_APPCURSOR))) {
3030 continue;
3031 }
3032
3033 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3034 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3035 continue;
3036 }
3037
3038 return kp->s;
3039 }
3040
3041 return NULL;
3042 }
3043
3044 void
3045 kpress(XEvent *ev) {
3046 XKeyEvent *e = &ev->xkey;
3047 KeySym ksym;
3048 char xstr[31], buf[32], *customkey, *cp = buf;
3049 int len;
3050 Status status;
3051 Shortcut *bp;
3052
3053 if (IS_SET(MODE_KBDLOCK))
3054 return;
3055
3056 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3057 e->state &= ~Mod2Mask;
3058 /* 1. shortcuts */
3059 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3060 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3061 bp->func(&(bp->arg));
3062 return;
3063 }
3064 }
3065
3066 /* 2. custom keys from config.h */
3067 if((customkey = kmap(ksym, e->state))) {
3068 len = strlen(customkey);
3069 memcpy(buf, customkey, len);
3070 /* 2. hardcoded (overrides X lookup) */
3071 } else {
3072 if(len == 0)
3073 return;
3074
3075 if (len == 1 && e->state & Mod1Mask)
3076 *cp++ = '\033';
3077
3078 memcpy(cp, xstr, len);
3079 len = cp - buf + len;
3080 }
3081
3082 ttywrite(buf, len);
3083 if(IS_SET(MODE_ECHO))
3084 techo(buf, len);
3085 }
3086
3087
3088 void
3089 cmessage(XEvent *e) {
3090 /* See xembed specs
3091 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
3092 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3093 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3094 xw.state |= WIN_FOCUSED;
3095 xseturgency(0);
3096 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3097 xw.state &= ~WIN_FOCUSED;
3098 }
3099 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3100 /* Send SIGHUP to shell */
3101 kill(pid, SIGHUP);
3102 exit(EXIT_SUCCESS);
3103 }
3104 }
3105
3106 void
3107 cresize(int width, int height)
3108 {
3109 int col, row;
3110
3111 if(width != 0)
3112 xw.w = width;
3113 if(height != 0)
3114 xw.h = height;
3115
3116 col = (xw.w - 2 * borderpx) / xw.cw;
3117 row = (xw.h - 2 * borderpx) / xw.ch;
3118
3119 tresize(col, row);
3120 xresize(col, row);
3121 ttyresize();
3122 }
3123
3124 void
3125 resize(XEvent *e) {
3126 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3127 return;
3128
3129 cresize(e->xconfigure.width, e->xconfigure.height);
3130 }
3131
3132 void
3133 run(void) {
3134 XEvent ev;
3135 fd_set rfd;
3136 int xfd = XConnectionNumber(xw.dpy), i;
3137 struct timeval drawtimeout, *tv = NULL;
3138
3139 for(i = 0;; i++) {
3140 FD_ZERO(&rfd);
3141 FD_SET(cmdfd, &rfd);
3142 FD_SET(xfd, &rfd);
3143 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3144 if(errno == EINTR)
3145 continue;
3146 die("select failed: %s\n", SERRNO);
3147 }
3148
3149 /*
3150 * Stop after a certain number of reads so the user does not
3151 * feel like the system is stuttering.
3152 */
3153 if(i < 1000 && FD_ISSET(cmdfd, &rfd)) {
3154 ttyread();
3155
3156 /*
3157 * Just wait a bit so it isn't disturbing the
3158 * user and the system is able to write something.
3159 */
3160 drawtimeout.tv_sec = 0;
3161 drawtimeout.tv_usec = 5;
3162 tv = &drawtimeout;
3163 continue;
3164 }
3165 i = 0;
3166 tv = NULL;
3167
3168 while(XPending(xw.dpy)) {
3169 XNextEvent(xw.dpy, &ev);
3170 if(XFilterEvent(&ev, None))
3171 continue;
3172 if(handler[ev.type])
3173 (handler[ev.type])(&ev);
3174 }
3175
3176 draw();
3177 XFlush(xw.dpy);
3178 }
3179 }
3180
3181 int
3182 main(int argc, char *argv[]) {
3183 int i, bitm, xr, yr;
3184 uint wr, hr;
3185
3186 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3187 xw.isfixed = False;
3188
3189 for(i = 1; i < argc; i++) {
3190 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
3191 case 'c':
3192 if(++i < argc)
3193 opt_class = argv[i];
3194 break;
3195 case 'e':
3196 /* eat all remaining arguments */
3197 if(++i < argc)
3198 opt_cmd = &argv[i];
3199 goto run;
3200 case 'f':
3201 if(++i < argc)
3202 opt_font = argv[i];
3203 break;
3204 case 'g':
3205 if(++i >= argc)
3206 break;
3207
3208 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
3209 if(bitm & XValue)
3210 xw.fx = xr;
3211 if(bitm & YValue)
3212 xw.fy = yr;
3213 if(bitm & WidthValue)
3214 xw.fw = (int)wr;
3215 if(bitm & HeightValue)
3216 xw.fh = (int)hr;
3217 if(bitm & XNegative && xw.fx == 0)
3218 xw.fx = -1;
3219 if(bitm & XNegative && xw.fy == 0)
3220 xw.fy = -1;
3221
3222 if(xw.fh != 0 && xw.fw != 0)
3223 xw.isfixed = True;
3224 break;
3225 case 'o':
3226 if(++i < argc)
3227 opt_io = argv[i];
3228 break;
3229 case 't':
3230 if(++i < argc)
3231 opt_title = argv[i];
3232 break;
3233 case 'v':
3234 default:
3235 die(USAGE);
3236 case 'w':
3237 if(++i < argc)
3238 opt_embed = argv[i];
3239 break;
3240 }
3241 }
3242
3243 run:
3244 setlocale(LC_CTYPE, "");
3245 XSetLocaleModifiers("");
3246 tnew(80, 24);
3247 xinit();
3248 ttynew();
3249 selinit();
3250 run();
3251
3252 return 0;
3253 }
3254