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96e66fb23f669fe1c7fe505a31de623ba9e6a140
[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 fprintf(stderr, "selrequest\n");
797 XSelectionRequestEvent *xsre;
798 XSelectionEvent xev;
799 Atom xa_targets, string;
800
801 xsre = (XSelectionRequestEvent *) e;
802 xev.type = SelectionNotify;
803 xev.requestor = xsre->requestor;
804 xev.selection = xsre->selection;
805 xev.target = xsre->target;
806 xev.time = xsre->time;
807 /* reject */
808 xev.property = None;
809
810 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
811 if(xsre->target == xa_targets) {
812 /* respond with the supported type */
813 string = sel.xtarget;
814 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
815 XA_ATOM, 32, PropModeReplace,
816 (uchar *) &string, 1);
817 xev.property = xsre->property;
818 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
819 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
820 xsre->target, 8, PropModeReplace,
821 (uchar *) sel.clip, strlen(sel.clip));
822 xev.property = xsre->property;
823 }
824
825 /* all done, send a notification to the listener */
826 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
827 fprintf(stderr, "Error sending SelectionNotify event\n");
828 }
829
830 void
831 xsetsel(char *str) {
832 fprintf(stderr, "xsetsel: %s\n", str);
833 /* register the selection for both the clipboard and the primary */
834 Atom clipboard;
835
836 free(sel.clip);
837 sel.clip = str;
838
839 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
840
841 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
842 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
843 }
844
845 void
846 brelease(XEvent *e) {
847 struct timeval now;
848
849 if(IS_SET(MODE_MOUSE)) {
850 mousereport(e);
851 return;
852 }
853
854 if(e->xbutton.button == Button2) {
855 selpaste(NULL);
856 } else if(e->xbutton.button == Button1) {
857 sel.mode = 0;
858 getbuttoninfo(e);
859 term.dirty[sel.ey] = 1;
860 if(sel.bx == sel.ex && sel.by == sel.ey) {
861 sel.bx = -1;
862 gettimeofday(&now, NULL);
863
864 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
865 /* triple click on the line */
866 sel.b.x = sel.bx = 0;
867 sel.e.x = sel.ex = term.col;
868 sel.b.y = sel.e.y = sel.ey;
869 selcopy();
870 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
871 /* double click to select word */
872 sel.bx = sel.ex;
873 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
874 term.line[sel.ey][sel.bx-1].c[0] != ' ') {
875 sel.bx--;
876 }
877 sel.b.x = sel.bx;
878 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
879 term.line[sel.ey][sel.ex+1].c[0] != ' ') {
880 sel.ex++;
881 }
882 sel.e.x = sel.ex;
883 sel.b.y = sel.e.y = sel.ey;
884 selcopy();
885 }
886 } else {
887 selcopy();
888 }
889 }
890
891 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
892 gettimeofday(&sel.tclick1, NULL);
893 }
894
895 void
896 bmotion(XEvent *e) {
897 int starty, endy, oldey, oldex;
898
899 if(IS_SET(MODE_MOUSE)) {
900 mousereport(e);
901 return;
902 }
903
904 if(!sel.mode)
905 return;
906
907 oldey = sel.ey;
908 oldex = sel.ex;
909 getbuttoninfo(e);
910
911 if(oldey != sel.ey || oldex != sel.ex) {
912 starty = MIN(oldey, sel.ey);
913 endy = MAX(oldey, sel.ey);
914 tsetdirt(starty, endy);
915 }
916 }
917
918 void
919 die(const char *errstr, ...) {
920 va_list ap;
921
922 va_start(ap, errstr);
923 vfprintf(stderr, errstr, ap);
924 va_end(ap);
925 exit(EXIT_FAILURE);
926 }
927
928 void
929 execsh(void) {
930 char **args;
931 char *envshell = getenv("SHELL");
932 const struct passwd *pass = getpwuid(getuid());
933 char buf[sizeof(long) * 8 + 1];
934
935 unsetenv("COLUMNS");
936 unsetenv("LINES");
937 unsetenv("TERMCAP");
938
939 if(pass) {
940 setenv("LOGNAME", pass->pw_name, 1);
941 setenv("USER", pass->pw_name, 1);
942 setenv("SHELL", pass->pw_shell, 0);
943 setenv("HOME", pass->pw_dir, 0);
944 }
945
946 snprintf(buf, sizeof(buf), "%lu", xw.win);
947 setenv("WINDOWID", buf, 1);
948
949 signal(SIGCHLD, SIG_DFL);
950 signal(SIGHUP, SIG_DFL);
951 signal(SIGINT, SIG_DFL);
952 signal(SIGQUIT, SIG_DFL);
953 signal(SIGTERM, SIG_DFL);
954 signal(SIGALRM, SIG_DFL);
955
956 DEFAULT(envshell, shell);
957 setenv("TERM", termname, 1);
958 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
959 execvp(args[0], args);
960 exit(EXIT_FAILURE);
961 }
962
963 void
964 sigchld(int a) {
965 int stat = 0;
966
967 if(waitpid(pid, &stat, 0) < 0)
968 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
969
970 if(WIFEXITED(stat)) {
971 exit(WEXITSTATUS(stat));
972 } else {
973 exit(EXIT_FAILURE);
974 }
975 }
976
977 void
978 ttynew(void) {
979 int m, s;
980 struct winsize w = {term.row, term.col, 0, 0};
981
982 /* seems to work fine on linux, openbsd and freebsd */
983 if(openpty(&m, &s, NULL, NULL, &w) < 0)
984 die("openpty failed: %s\n", SERRNO);
985
986 switch(pid = fork()) {
987 case -1:
988 die("fork failed\n");
989 break;
990 case 0:
991 setsid(); /* create a new process group */
992 dup2(s, STDIN_FILENO);
993 dup2(s, STDOUT_FILENO);
994 dup2(s, STDERR_FILENO);
995 if(ioctl(s, TIOCSCTTY, NULL) < 0)
996 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
997 close(s);
998 close(m);
999 execsh();
1000 break;
1001 default:
1002 close(s);
1003 cmdfd = m;
1004 signal(SIGCHLD, sigchld);
1005 if(opt_io) {
1006 iofd = (!strcmp(opt_io, "-")) ?
1007 STDOUT_FILENO :
1008 open(opt_io, O_WRONLY | O_CREAT, 0666);
1009 if(iofd < 0) {
1010 fprintf(stderr, "Error opening %s:%s\n",
1011 opt_io, strerror(errno));
1012 }
1013 }
1014 }
1015 }
1016
1017 void
1018 dump(char c) {
1019 static int col;
1020
1021 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1022 if(++col % 10 == 0)
1023 fprintf(stderr, "\n");
1024 }
1025
1026 void
1027 ttyread(void) {
1028 static char buf[BUFSIZ];
1029 static int buflen = 0;
1030 char *ptr;
1031 char s[UTF_SIZ];
1032 int charsize; /* size of utf8 char in bytes */
1033 long utf8c;
1034 int ret;
1035
1036 /* append read bytes to unprocessed bytes */
1037 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1038 die("Couldn't read from shell: %s\n", SERRNO);
1039
1040 /* process every complete utf8 char */
1041 buflen += ret;
1042 ptr = buf;
1043 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1044 charsize = utf8decode(ptr, &utf8c);
1045 utf8encode(&utf8c, s);
1046 tputc(s, charsize);
1047 ptr += charsize;
1048 buflen -= charsize;
1049 }
1050
1051 /* keep any uncomplete utf8 char for the next call */
1052 memmove(buf, ptr, buflen);
1053 }
1054
1055 void
1056 ttywrite(const char *s, size_t n) {
1057 if(write(cmdfd, s, n) == -1)
1058 die("write error on tty: %s\n", SERRNO);
1059 }
1060
1061 void
1062 ttyresize(void) {
1063 struct winsize w;
1064
1065 w.ws_row = term.row;
1066 w.ws_col = term.col;
1067 w.ws_xpixel = xw.tw;
1068 w.ws_ypixel = xw.th;
1069 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1070 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1071 }
1072
1073 void
1074 tsetdirt(int top, int bot) {
1075 int i;
1076
1077 LIMIT(top, 0, term.row-1);
1078 LIMIT(bot, 0, term.row-1);
1079
1080 for(i = top; i <= bot; i++)
1081 term.dirty[i] = 1;
1082 }
1083
1084 void
1085 tfulldirt(void) {
1086 tsetdirt(0, term.row-1);
1087 }
1088
1089 void
1090 tcursor(int mode) {
1091 static TCursor c;
1092
1093 if(mode == CURSOR_SAVE) {
1094 c = term.c;
1095 } else if(mode == CURSOR_LOAD) {
1096 term.c = c;
1097 tmoveto(c.x, c.y);
1098 }
1099 }
1100
1101 void
1102 treset(void) {
1103 uint i;
1104
1105 term.c = (TCursor){{
1106 .mode = ATTR_NULL,
1107 .fg = defaultfg,
1108 .bg = defaultbg
1109 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1110
1111 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1112 for(i = tabspaces; i < term.col; i += tabspaces)
1113 term.tabs[i] = 1;
1114 term.top = 0;
1115 term.bot = term.row - 1;
1116 term.mode = MODE_WRAP;
1117
1118 tclearregion(0, 0, term.col-1, term.row-1, 0);
1119 tmoveto(0, 0);
1120 tcursor(CURSOR_SAVE);
1121 }
1122
1123 void
1124 tnew(int col, int row) {
1125 /* set screen size */
1126 term.row = row;
1127 term.col = col;
1128 term.line = xmalloc(term.row * sizeof(Line));
1129 term.alt = xmalloc(term.row * sizeof(Line));
1130 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
1131 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
1132
1133 for(row = 0; row < term.row; row++) {
1134 term.line[row] = xmalloc(term.col * sizeof(Glyph));
1135 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
1136 term.dirty[row] = 0;
1137 }
1138
1139 term.numlock = 1;
1140 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1141 /* setup screen */
1142 treset();
1143 }
1144
1145 void
1146 tswapscreen(void) {
1147 Line *tmp = term.line;
1148
1149 term.line = term.alt;
1150 term.alt = tmp;
1151 term.mode ^= MODE_ALTSCREEN;
1152 tfulldirt();
1153 }
1154
1155 void
1156 tscrolldown(int orig, int n) {
1157 int i;
1158 Line temp;
1159
1160 LIMIT(n, 0, term.bot-orig+1);
1161
1162 tclearregion(0, term.bot-n+1, term.col-1, term.bot, 0);
1163
1164 for(i = term.bot; i >= orig+n; i--) {
1165 temp = term.line[i];
1166 term.line[i] = term.line[i-n];
1167 term.line[i-n] = temp;
1168
1169 term.dirty[i] = 1;
1170 term.dirty[i-n] = 1;
1171 }
1172
1173 selscroll(orig, n);
1174 }
1175
1176 void
1177 tscrollup(int orig, int n) {
1178 int i;
1179 Line temp;
1180 LIMIT(n, 0, term.bot-orig+1);
1181
1182 tclearregion(0, orig, term.col-1, orig+n-1, 0);
1183
1184 for(i = orig; i <= term.bot-n; i++) {
1185 temp = term.line[i];
1186 term.line[i] = term.line[i+n];
1187 term.line[i+n] = temp;
1188
1189 term.dirty[i] = 1;
1190 term.dirty[i+n] = 1;
1191 }
1192
1193 selscroll(orig, -n);
1194 }
1195
1196 void
1197 selscroll(int orig, int n) {
1198 if(sel.bx == -1)
1199 return;
1200
1201 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1202 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1203 sel.bx = -1;
1204 return;
1205 }
1206 if(sel.by < term.top) {
1207 sel.by = term.top;
1208 sel.bx = 0;
1209 }
1210 if(sel.ey > term.bot) {
1211 sel.ey = term.bot;
1212 sel.ex = term.col;
1213 }
1214 sel.b.y = sel.by, sel.b.x = sel.bx;
1215 sel.e.y = sel.ey, sel.e.x = sel.ex;
1216 }
1217 }
1218
1219 void
1220 tnewline(int first_col) {
1221 int y = term.c.y;
1222
1223 if(y == term.bot) {
1224 tscrollup(term.top, 1);
1225 } else {
1226 y++;
1227 }
1228 tmoveto(first_col ? 0 : term.c.x, y);
1229 }
1230
1231 void
1232 csiparse(void) {
1233 /* int noarg = 1; */
1234 char *p = csiescseq.buf;
1235
1236 csiescseq.narg = 0;
1237 if(*p == '?')
1238 csiescseq.priv = 1, p++;
1239
1240 while(p < csiescseq.buf+csiescseq.len) {
1241 while(isdigit(*p)) {
1242 csiescseq.arg[csiescseq.narg] *= 10;
1243 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1244 }
1245 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ) {
1246 csiescseq.narg++, p++;
1247 } else {
1248 csiescseq.mode = *p;
1249 csiescseq.narg++;
1250
1251 return;
1252 }
1253 }
1254 }
1255
1256 /* for absolute user moves, when decom is set */
1257 void
1258 tmoveato(int x, int y) {
1259 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1260 }
1261
1262 void
1263 tmoveto(int x, int y) {
1264 int miny, maxy;
1265
1266 if(term.c.state & CURSOR_ORIGIN) {
1267 miny = term.top;
1268 maxy = term.bot;
1269 } else {
1270 miny = 0;
1271 maxy = term.row - 1;
1272 }
1273 LIMIT(x, 0, term.col-1);
1274 LIMIT(y, miny, maxy);
1275 term.c.state &= ~CURSOR_WRAPNEXT;
1276 term.c.x = x;
1277 term.c.y = y;
1278 }
1279
1280 void
1281 tsetchar(char *c, Glyph *attr, int x, int y) {
1282 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1283 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1284 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1285 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1286 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1287 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1288 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1289 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1290 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1291 };
1292
1293 /*
1294 * The table is proudly stolen from rxvt.
1295 */
1296 if(attr->mode & ATTR_GFX) {
1297 if(c[0] >= 0x41 && c[0] <= 0x7e
1298 && vt100_0[c[0] - 0x41]) {
1299 c = vt100_0[c[0] - 0x41];
1300 }
1301 }
1302
1303 term.dirty[y] = 1;
1304 term.line[y][x] = *attr;
1305 memcpy(term.line[y][x].c, c, UTF_SIZ);
1306 term.line[y][x].state |= GLYPH_SET;
1307 }
1308
1309 void
1310 tclearregion(int x1, int y1, int x2, int y2, int bce) {
1311 int x, y, temp;
1312
1313 if(x1 > x2)
1314 temp = x1, x1 = x2, x2 = temp;
1315 if(y1 > y2)
1316 temp = y1, y1 = y2, y2 = temp;
1317
1318 LIMIT(x1, 0, term.col-1);
1319 LIMIT(x2, 0, term.col-1);
1320 LIMIT(y1, 0, term.row-1);
1321 LIMIT(y2, 0, term.row-1);
1322
1323 for(y = y1; y <= y2; y++) {
1324 term.dirty[y] = 1;
1325 for(x = x1; x <= x2; x++) {
1326 if(bce) {
1327 term.line[y][x] = term.c.attr;
1328 memcpy(term.line[y][x].c, " ", 2);
1329 term.line[y][x].state |= GLYPH_SET;
1330 } else {
1331 term.line[y][x].state = 0;
1332 }
1333 }
1334 }
1335 }
1336
1337 void
1338 tdeletechar(int n) {
1339 int src = term.c.x + n;
1340 int dst = term.c.x;
1341 int size = term.col - src;
1342
1343 term.dirty[term.c.y] = 1;
1344
1345 if(src >= term.col) {
1346 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1347 return;
1348 }
1349
1350 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1351 size * sizeof(Glyph));
1352 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y, 0);
1353 }
1354
1355 void
1356 tinsertblank(int n) {
1357 int src = term.c.x;
1358 int dst = src + n;
1359 int size = term.col - dst;
1360
1361 term.dirty[term.c.y] = 1;
1362
1363 if(dst >= term.col) {
1364 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1365 return;
1366 }
1367
1368 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1369 size * sizeof(Glyph));
1370 tclearregion(src, term.c.y, dst - 1, term.c.y, 0);
1371 }
1372
1373 void
1374 tinsertblankline(int n) {
1375 if(term.c.y < term.top || term.c.y > term.bot)
1376 return;
1377
1378 tscrolldown(term.c.y, n);
1379 }
1380
1381 void
1382 tdeleteline(int n) {
1383 if(term.c.y < term.top || term.c.y > term.bot)
1384 return;
1385
1386 tscrollup(term.c.y, n);
1387 }
1388
1389 void
1390 tsetattr(int *attr, int l) {
1391 int i;
1392
1393 for(i = 0; i < l; i++) {
1394 switch(attr[i]) {
1395 case 0:
1396 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1397 | ATTR_ITALIC | ATTR_BLINK);
1398 term.c.attr.fg = defaultfg;
1399 term.c.attr.bg = defaultbg;
1400 break;
1401 case 1:
1402 term.c.attr.mode |= ATTR_BOLD;
1403 break;
1404 case 3:
1405 term.c.attr.mode |= ATTR_ITALIC;
1406 break;
1407 case 4:
1408 term.c.attr.mode |= ATTR_UNDERLINE;
1409 break;
1410 case 5:
1411 term.c.attr.mode |= ATTR_BLINK;
1412 break;
1413 case 7:
1414 term.c.attr.mode |= ATTR_REVERSE;
1415 break;
1416 case 21:
1417 case 22:
1418 term.c.attr.mode &= ~ATTR_BOLD;
1419 break;
1420 case 23:
1421 term.c.attr.mode &= ~ATTR_ITALIC;
1422 break;
1423 case 24:
1424 term.c.attr.mode &= ~ATTR_UNDERLINE;
1425 break;
1426 case 25:
1427 term.c.attr.mode &= ~ATTR_BLINK;
1428 break;
1429 case 27:
1430 term.c.attr.mode &= ~ATTR_REVERSE;
1431 break;
1432 case 38:
1433 if(i + 2 < l && attr[i + 1] == 5) {
1434 i += 2;
1435 if(BETWEEN(attr[i], 0, 255)) {
1436 term.c.attr.fg = attr[i];
1437 } else {
1438 fprintf(stderr,
1439 "erresc: bad fgcolor %d\n",
1440 attr[i]);
1441 }
1442 } else {
1443 fprintf(stderr,
1444 "erresc(38): gfx attr %d unknown\n",
1445 attr[i]);
1446 }
1447 break;
1448 case 39:
1449 term.c.attr.fg = defaultfg;
1450 break;
1451 case 48:
1452 if(i + 2 < l && attr[i + 1] == 5) {
1453 i += 2;
1454 if(BETWEEN(attr[i], 0, 255)) {
1455 term.c.attr.bg = attr[i];
1456 } else {
1457 fprintf(stderr,
1458 "erresc: bad bgcolor %d\n",
1459 attr[i]);
1460 }
1461 } else {
1462 fprintf(stderr,
1463 "erresc(48): gfx attr %d unknown\n",
1464 attr[i]);
1465 }
1466 break;
1467 case 49:
1468 term.c.attr.bg = defaultbg;
1469 break;
1470 default:
1471 if(BETWEEN(attr[i], 30, 37)) {
1472 term.c.attr.fg = attr[i] - 30;
1473 } else if(BETWEEN(attr[i], 40, 47)) {
1474 term.c.attr.bg = attr[i] - 40;
1475 } else if(BETWEEN(attr[i], 90, 97)) {
1476 term.c.attr.fg = attr[i] - 90 + 8;
1477 } else if(BETWEEN(attr[i], 100, 107)) {
1478 term.c.attr.bg = attr[i] - 100 + 8;
1479 } else {
1480 fprintf(stderr,
1481 "erresc(default): gfx attr %d unknown\n",
1482 attr[i]), csidump();
1483 }
1484 break;
1485 }
1486 }
1487 }
1488
1489 void
1490 tsetscroll(int t, int b) {
1491 int temp;
1492
1493 LIMIT(t, 0, term.row-1);
1494 LIMIT(b, 0, term.row-1);
1495 if(t > b) {
1496 temp = t;
1497 t = b;
1498 b = temp;
1499 }
1500 term.top = t;
1501 term.bot = b;
1502 }
1503
1504 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1505
1506 void
1507 tsetmode(bool priv, bool set, int *args, int narg) {
1508 int *lim, mode;
1509 bool alt;
1510
1511 for(lim = args + narg; args < lim; ++args) {
1512 if(priv) {
1513 switch(*args) {
1514 break;
1515 case 1: /* DECCKM -- Cursor key */
1516 MODBIT(term.mode, set, MODE_APPCURSOR);
1517 break;
1518 case 5: /* DECSCNM -- Reverse video */
1519 mode = term.mode;
1520 MODBIT(term.mode, set, MODE_REVERSE);
1521 if(mode != term.mode)
1522 redraw(REDRAW_TIMEOUT);
1523 break;
1524 case 6: /* DECOM -- Origin */
1525 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1526 tmoveato(0, 0);
1527 break;
1528 case 7: /* DECAWM -- Auto wrap */
1529 MODBIT(term.mode, set, MODE_WRAP);
1530 break;
1531 case 0: /* Error (IGNORED) */
1532 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1533 case 3: /* DECCOLM -- Column (IGNORED) */
1534 case 4: /* DECSCLM -- Scroll (IGNORED) */
1535 case 8: /* DECARM -- Auto repeat (IGNORED) */
1536 case 18: /* DECPFF -- Printer feed (IGNORED) */
1537 case 19: /* DECPEX -- Printer extent (IGNORED) */
1538 case 42: /* DECNRCM -- National characters (IGNORED) */
1539 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1540 break;
1541 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1542 MODBIT(term.mode, !set, MODE_HIDE);
1543 break;
1544 case 1000: /* 1000,1002: enable xterm mouse report */
1545 MODBIT(term.mode, set, MODE_MOUSEBTN);
1546 break;
1547 case 1002:
1548 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1549 break;
1550 case 1049: /* = 1047 and 1048 */
1551 case 47:
1552 case 1047: {
1553 alt = IS_SET(MODE_ALTSCREEN);
1554 if(alt) {
1555 tclearregion(0, 0, term.col-1,
1556 term.row-1, 0);
1557 }
1558 if(set ^ alt) /* set is always 1 or 0 */
1559 tswapscreen();
1560 if(*args != 1049)
1561 break;
1562 }
1563 /* pass through */
1564 case 1048:
1565 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1566 break;
1567 default:
1568 fprintf(stderr,
1569 "erresc: unknown private set/reset mode %d\n",
1570 *args);
1571 break;
1572 }
1573 } else {
1574 switch(*args) {
1575 case 0: /* Error (IGNORED) */
1576 break;
1577 case 2: /* KAM -- keyboard action */
1578 MODBIT(term.mode, set, MODE_KBDLOCK);
1579 break;
1580 case 4: /* IRM -- Insertion-replacement */
1581 MODBIT(term.mode, set, MODE_INSERT);
1582 break;
1583 case 12: /* SRM -- Send/Receive */
1584 MODBIT(term.mode, !set, MODE_ECHO);
1585 break;
1586 case 20: /* LNM -- Linefeed/new line */
1587 MODBIT(term.mode, set, MODE_CRLF);
1588 break;
1589 default:
1590 fprintf(stderr,
1591 "erresc: unknown set/reset mode %d\n",
1592 *args);
1593 break;
1594 }
1595 }
1596 }
1597 }
1598 #undef MODBIT
1599
1600
1601 void
1602 csihandle(void) {
1603 switch(csiescseq.mode) {
1604 default:
1605 unknown:
1606 fprintf(stderr, "erresc: unknown csi ");
1607 csidump();
1608 /* die(""); */
1609 break;
1610 case '@': /* ICH -- Insert <n> blank char */
1611 DEFAULT(csiescseq.arg[0], 1);
1612 tinsertblank(csiescseq.arg[0]);
1613 break;
1614 case 'A': /* CUU -- Cursor <n> Up */
1615 DEFAULT(csiescseq.arg[0], 1);
1616 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1617 break;
1618 case 'B': /* CUD -- Cursor <n> Down */
1619 case 'e': /* VPR --Cursor <n> Down */
1620 DEFAULT(csiescseq.arg[0], 1);
1621 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1622 break;
1623 case 'c': /* DA -- Device Attributes */
1624 if(csiescseq.arg[0] == 0)
1625 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1626 break;
1627 case 'C': /* CUF -- Cursor <n> Forward */
1628 case 'a': /* HPR -- Cursor <n> Forward */
1629 DEFAULT(csiescseq.arg[0], 1);
1630 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1631 break;
1632 case 'D': /* CUB -- Cursor <n> Backward */
1633 DEFAULT(csiescseq.arg[0], 1);
1634 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1635 break;
1636 case 'E': /* CNL -- Cursor <n> Down and first col */
1637 DEFAULT(csiescseq.arg[0], 1);
1638 tmoveto(0, term.c.y+csiescseq.arg[0]);
1639 break;
1640 case 'F': /* CPL -- Cursor <n> Up and first col */
1641 DEFAULT(csiescseq.arg[0], 1);
1642 tmoveto(0, term.c.y-csiescseq.arg[0]);
1643 break;
1644 case 'g': /* TBC -- Tabulation clear */
1645 switch (csiescseq.arg[0]) {
1646 case 0: /* clear current tab stop */
1647 term.tabs[term.c.x] = 0;
1648 break;
1649 case 3: /* clear all the tabs */
1650 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1651 break;
1652 default:
1653 goto unknown;
1654 }
1655 break;
1656 case 'G': /* CHA -- Move to <col> */
1657 case '`': /* HPA */
1658 DEFAULT(csiescseq.arg[0], 1);
1659 tmoveto(csiescseq.arg[0]-1, term.c.y);
1660 break;
1661 case 'H': /* CUP -- Move to <row> <col> */
1662 case 'f': /* HVP */
1663 DEFAULT(csiescseq.arg[0], 1);
1664 DEFAULT(csiescseq.arg[1], 1);
1665 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1666 break;
1667 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1668 DEFAULT(csiescseq.arg[0], 1);
1669 while(csiescseq.arg[0]--)
1670 tputtab(1);
1671 break;
1672 case 'J': /* ED -- Clear screen */
1673 sel.bx = -1;
1674 switch(csiescseq.arg[0]) {
1675 case 0: /* below */
1676 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 1);
1677 if(term.c.y < term.row-1) {
1678 tclearregion(0, term.c.y+1, term.col-1,
1679 term.row-1, 1);
1680 }
1681 break;
1682 case 1: /* above */
1683 if(term.c.y > 1)
1684 tclearregion(0, 0, term.col-1, term.c.y-1, 1);
1685 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1686 break;
1687 case 2: /* all */
1688 tclearregion(0, 0, term.col-1, term.row-1, 1);
1689 break;
1690 default:
1691 goto unknown;
1692 }
1693 break;
1694 case 'K': /* EL -- Clear line */
1695 switch(csiescseq.arg[0]) {
1696 case 0: /* right */
1697 tclearregion(term.c.x, term.c.y, term.col-1,
1698 term.c.y, 1);
1699 break;
1700 case 1: /* left */
1701 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1702 break;
1703 case 2: /* all */
1704 tclearregion(0, term.c.y, term.col-1, term.c.y, 1);
1705 break;
1706 }
1707 break;
1708 case 'S': /* SU -- Scroll <n> line up */
1709 DEFAULT(csiescseq.arg[0], 1);
1710 tscrollup(term.top, csiescseq.arg[0]);
1711 break;
1712 case 'T': /* SD -- Scroll <n> line down */
1713 DEFAULT(csiescseq.arg[0], 1);
1714 tscrolldown(term.top, csiescseq.arg[0]);
1715 break;
1716 case 'L': /* IL -- Insert <n> blank lines */
1717 DEFAULT(csiescseq.arg[0], 1);
1718 tinsertblankline(csiescseq.arg[0]);
1719 break;
1720 case 'l': /* RM -- Reset Mode */
1721 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1722 break;
1723 case 'M': /* DL -- Delete <n> lines */
1724 DEFAULT(csiescseq.arg[0], 1);
1725 tdeleteline(csiescseq.arg[0]);
1726 break;
1727 case 'X': /* ECH -- Erase <n> char */
1728 DEFAULT(csiescseq.arg[0], 1);
1729 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0],
1730 term.c.y, 0);
1731 break;
1732 case 'P': /* DCH -- Delete <n> char */
1733 DEFAULT(csiescseq.arg[0], 1);
1734 tdeletechar(csiescseq.arg[0]);
1735 break;
1736 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1737 DEFAULT(csiescseq.arg[0], 1);
1738 while(csiescseq.arg[0]--)
1739 tputtab(0);
1740 break;
1741 case 'd': /* VPA -- Move to <row> */
1742 DEFAULT(csiescseq.arg[0], 1);
1743 tmoveato(term.c.x, csiescseq.arg[0]-1);
1744 break;
1745 case 'h': /* SM -- Set terminal mode */
1746 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1747 break;
1748 case 'm': /* SGR -- Terminal attribute (color) */
1749 tsetattr(csiescseq.arg, csiescseq.narg);
1750 break;
1751 case 'r': /* DECSTBM -- Set Scrolling Region */
1752 if(csiescseq.priv) {
1753 goto unknown;
1754 } else {
1755 DEFAULT(csiescseq.arg[0], 1);
1756 DEFAULT(csiescseq.arg[1], term.row);
1757 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1758 tmoveato(0, 0);
1759 }
1760 break;
1761 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1762 tcursor(CURSOR_SAVE);
1763 break;
1764 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1765 tcursor(CURSOR_LOAD);
1766 break;
1767 }
1768 }
1769
1770 void
1771 csidump(void) {
1772 int i;
1773 uint c;
1774
1775 printf("ESC[");
1776 for(i = 0; i < csiescseq.len; i++) {
1777 c = csiescseq.buf[i] & 0xff;
1778 if(isprint(c)) {
1779 putchar(c);
1780 } else if(c == '\n') {
1781 printf("(\\n)");
1782 } else if(c == '\r') {
1783 printf("(\\r)");
1784 } else if(c == 0x1b) {
1785 printf("(\\e)");
1786 } else {
1787 printf("(%02x)", c);
1788 }
1789 }
1790 putchar('\n');
1791 }
1792
1793 void
1794 csireset(void) {
1795 memset(&csiescseq, 0, sizeof(csiescseq));
1796 }
1797
1798 void
1799 strhandle(void) {
1800 char *p;
1801
1802 /*
1803 * TODO: make this being useful in case of color palette change.
1804 */
1805 strparse();
1806
1807 p = strescseq.buf;
1808
1809 switch(strescseq.type) {
1810 case ']': /* OSC -- Operating System Command */
1811 switch(p[0]) {
1812 case '0':
1813 case '1':
1814 case '2':
1815 /*
1816 * TODO: Handle special chars in string, like umlauts.
1817 */
1818 if(p[1] == ';') {
1819 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1820 }
1821 break;
1822 case ';':
1823 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1824 break;
1825 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1826 break;
1827 default:
1828 fprintf(stderr, "erresc: unknown str ");
1829 strdump();
1830 break;
1831 }
1832 break;
1833 case 'k': /* old title set compatibility */
1834 XStoreName(xw.dpy, xw.win, strescseq.buf);
1835 break;
1836 case 'P': /* DSC -- Device Control String */
1837 case '_': /* APC -- Application Program Command */
1838 case '^': /* PM -- Privacy Message */
1839 default:
1840 fprintf(stderr, "erresc: unknown str ");
1841 strdump();
1842 /* die(""); */
1843 break;
1844 }
1845 }
1846
1847 void
1848 strparse(void) {
1849 /*
1850 * TODO: Implement parsing like for CSI when required.
1851 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1852 */
1853 return;
1854 }
1855
1856 void
1857 strdump(void) {
1858 int i;
1859 uint c;
1860
1861 printf("ESC%c", strescseq.type);
1862 for(i = 0; i < strescseq.len; i++) {
1863 c = strescseq.buf[i] & 0xff;
1864 if(isprint(c)) {
1865 putchar(c);
1866 } else if(c == '\n') {
1867 printf("(\\n)");
1868 } else if(c == '\r') {
1869 printf("(\\r)");
1870 } else if(c == 0x1b) {
1871 printf("(\\e)");
1872 } else {
1873 printf("(%02x)", c);
1874 }
1875 }
1876 printf("ESC\\\n");
1877 }
1878
1879 void
1880 strreset(void) {
1881 memset(&strescseq, 0, sizeof(strescseq));
1882 }
1883
1884 void
1885 tputtab(bool forward) {
1886 uint x = term.c.x;
1887
1888 if(forward) {
1889 if(x == term.col)
1890 return;
1891 for(++x; x < term.col && !term.tabs[x]; ++x)
1892 /* nothing */ ;
1893 } else {
1894 if(x == 0)
1895 return;
1896 for(--x; x > 0 && !term.tabs[x]; --x)
1897 /* nothing */ ;
1898 }
1899 tmoveto(x, term.c.y);
1900 }
1901
1902 void
1903 techo(char *buf, int len) {
1904 for(; len > 0; buf++, len--) {
1905 char c = *buf;
1906
1907 if(c == '\033') { /* escape */
1908 tputc("^", 1);
1909 tputc("[", 1);
1910 } else if (c < '\x20') { /* control code */
1911 if(c != '\n' && c != '\r' && c != '\t') {
1912 c |= '\x40';
1913 tputc("^", 1);
1914 }
1915 tputc(&c, 1);
1916 } else {
1917 break;
1918 }
1919 }
1920 if (len)
1921 tputc(buf, len);
1922 }
1923
1924 void
1925 tputc(char *c, int len) {
1926 uchar ascii = *c;
1927 bool control = ascii < '\x20' || ascii == 0177;
1928
1929 if(iofd != -1) {
1930 if (xwrite(iofd, c, len) < 0) {
1931 fprintf(stderr, "Error writing in %s:%s\n",
1932 opt_io, strerror(errno));
1933 close(iofd);
1934 iofd = -1;
1935 }
1936 }
1937
1938 /*
1939 * STR sequences must be checked before anything else
1940 * because it can use some control codes as part of the sequence.
1941 */
1942 if(term.esc & ESC_STR) {
1943 switch(ascii) {
1944 case '\033':
1945 term.esc = ESC_START | ESC_STR_END;
1946 break;
1947 case '\a': /* backwards compatibility to xterm */
1948 term.esc = 0;
1949 strhandle();
1950 break;
1951 default:
1952 if(strescseq.len + len < sizeof(strescseq.buf)) {
1953 memmove(&strescseq.buf[strescseq.len], c, len);
1954 strescseq.len += len;
1955 } else {
1956 /*
1957 * Here is a bug in terminals. If the user never sends
1958 * some code to stop the str or esc command, then st
1959 * will stop responding. But this is better than
1960 * silently failing with unknown characters. At least
1961 * then users will report back.
1962 *
1963 * In the case users ever get fixed, here is the code:
1964 */
1965 /*
1966 * term.esc = 0;
1967 * strhandle();
1968 */
1969 }
1970 }
1971 return;
1972 }
1973
1974 /*
1975 * Actions of control codes must be performed as soon they arrive
1976 * because they can be embedded inside a control sequence, and
1977 * they must not cause conflicts with sequences.
1978 */
1979 if(control) {
1980 switch(ascii) {
1981 case '\t': /* HT */
1982 tputtab(1);
1983 return;
1984 case '\b': /* BS */
1985 tmoveto(term.c.x-1, term.c.y);
1986 return;
1987 case '\r': /* CR */
1988 tmoveto(0, term.c.y);
1989 return;
1990 case '\f': /* LF */
1991 case '\v': /* VT */
1992 case '\n': /* LF */
1993 /* go to first col if the mode is set */
1994 tnewline(IS_SET(MODE_CRLF));
1995 return;
1996 case '\a': /* BEL */
1997 if(!(xw.state & WIN_FOCUSED))
1998 xseturgency(1);
1999 return;
2000 case '\033': /* ESC */
2001 csireset();
2002 term.esc = ESC_START;
2003 return;
2004 case '\016': /* SO */
2005 case '\017': /* SI */
2006 /*
2007 * Different charsets are hard to handle. Applications
2008 * should use the right alt charset escapes for the
2009 * only reason they still exist: line drawing. The
2010 * rest is incompatible history st should not support.
2011 */
2012 return;
2013 case '\032': /* SUB */
2014 case '\030': /* CAN */
2015 csireset();
2016 return;
2017 case '\005': /* ENQ (IGNORED) */
2018 case '\000': /* NUL (IGNORED) */
2019 case '\021': /* XON (IGNORED) */
2020 case '\023': /* XOFF (IGNORED) */
2021 case 0177: /* DEL (IGNORED) */
2022 return;
2023 }
2024 } else if(term.esc & ESC_START) {
2025 if(term.esc & ESC_CSI) {
2026 csiescseq.buf[csiescseq.len++] = ascii;
2027 if(BETWEEN(ascii, 0x40, 0x7E)
2028 || csiescseq.len >= ESC_BUF_SIZ) {
2029 term.esc = 0;
2030 csiparse(), csihandle();
2031 }
2032 } else if(term.esc & ESC_STR_END) {
2033 term.esc = 0;
2034 if(ascii == '\\')
2035 strhandle();
2036 } else if(term.esc & ESC_ALTCHARSET) {
2037 switch(ascii) {
2038 case '0': /* Line drawing set */
2039 term.c.attr.mode |= ATTR_GFX;
2040 break;
2041 case 'B': /* USASCII */
2042 term.c.attr.mode &= ~ATTR_GFX;
2043 break;
2044 case 'A': /* UK (IGNORED) */
2045 case '<': /* multinational charset (IGNORED) */
2046 case '5': /* Finnish (IGNORED) */
2047 case 'C': /* Finnish (IGNORED) */
2048 case 'K': /* German (IGNORED) */
2049 break;
2050 default:
2051 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2052 }
2053 term.esc = 0;
2054 } else if(term.esc & ESC_TEST) {
2055 if(ascii == '8') { /* DEC screen alignment test. */
2056 char E[UTF_SIZ] = "E";
2057 int x, y;
2058
2059 for(x = 0; x < term.col; ++x) {
2060 for(y = 0; y < term.row; ++y)
2061 tsetchar(E, &term.c.attr, x, y);
2062 }
2063 }
2064 term.esc = 0;
2065 } else {
2066 switch(ascii) {
2067 case '[':
2068 term.esc |= ESC_CSI;
2069 break;
2070 case '#':
2071 term.esc |= ESC_TEST;
2072 break;
2073 case 'P': /* DCS -- Device Control String */
2074 case '_': /* APC -- Application Program Command */
2075 case '^': /* PM -- Privacy Message */
2076 case ']': /* OSC -- Operating System Command */
2077 case 'k': /* old title set compatibility */
2078 strreset();
2079 strescseq.type = ascii;
2080 term.esc |= ESC_STR;
2081 break;
2082 case '(': /* set primary charset G0 */
2083 term.esc |= ESC_ALTCHARSET;
2084 break;
2085 case ')': /* set secondary charset G1 (IGNORED) */
2086 case '*': /* set tertiary charset G2 (IGNORED) */
2087 case '+': /* set quaternary charset G3 (IGNORED) */
2088 term.esc = 0;
2089 break;
2090 case 'D': /* IND -- Linefeed */
2091 if(term.c.y == term.bot) {
2092 tscrollup(term.top, 1);
2093 } else {
2094 tmoveto(term.c.x, term.c.y+1);
2095 }
2096 term.esc = 0;
2097 break;
2098 case 'E': /* NEL -- Next line */
2099 tnewline(1); /* always go to first col */
2100 term.esc = 0;
2101 break;
2102 case 'H': /* HTS -- Horizontal tab stop */
2103 term.tabs[term.c.x] = 1;
2104 term.esc = 0;
2105 break;
2106 case 'M': /* RI -- Reverse index */
2107 if(term.c.y == term.top) {
2108 tscrolldown(term.top, 1);
2109 } else {
2110 tmoveto(term.c.x, term.c.y-1);
2111 }
2112 term.esc = 0;
2113 break;
2114 case 'Z': /* DECID -- Identify Terminal */
2115 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2116 term.esc = 0;
2117 break;
2118 case 'c': /* RIS -- Reset to inital state */
2119 treset();
2120 term.esc = 0;
2121 xresettitle();
2122 break;
2123 case '=': /* DECPAM -- Application keypad */
2124 term.mode |= MODE_APPKEYPAD;
2125 term.esc = 0;
2126 break;
2127 case '>': /* DECPNM -- Normal keypad */
2128 term.mode &= ~MODE_APPKEYPAD;
2129 term.esc = 0;
2130 break;
2131 case '7': /* DECSC -- Save Cursor */
2132 tcursor(CURSOR_SAVE);
2133 term.esc = 0;
2134 break;
2135 case '8': /* DECRC -- Restore Cursor */
2136 tcursor(CURSOR_LOAD);
2137 term.esc = 0;
2138 break;
2139 case '\\': /* ST -- Stop */
2140 term.esc = 0;
2141 break;
2142 default:
2143 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2144 (uchar) ascii, isprint(ascii)? ascii:'.');
2145 term.esc = 0;
2146 }
2147 }
2148 /*
2149 * All characters which form part of a sequence are not
2150 * printed
2151 */
2152 return;
2153 }
2154 /*
2155 * Display control codes only if we are in graphic mode
2156 */
2157 if(control && !(term.c.attr.mode & ATTR_GFX))
2158 return;
2159 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2160 sel.bx = -1;
2161 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2162 tnewline(1); /* always go to first col */
2163
2164 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2165 memmove(&term.line[term.c.y][term.c.x+1],
2166 &term.line[term.c.y][term.c.x],
2167 (term.col - term.c.x - 1) * sizeof(Glyph));
2168 }
2169
2170 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2171 if(term.c.x+1 < term.col) {
2172 tmoveto(term.c.x+1, term.c.y);
2173 } else {
2174 term.c.state |= CURSOR_WRAPNEXT;
2175 }
2176 }
2177
2178 int
2179 tresize(int col, int row) {
2180 int i, x;
2181 int minrow = MIN(row, term.row);
2182 int mincol = MIN(col, term.col);
2183 int slide = term.c.y - row + 1;
2184 bool *bp;
2185
2186 if(col < 1 || row < 1)
2187 return 0;
2188
2189 /* free unneeded rows */
2190 i = 0;
2191 if(slide > 0) {
2192 /* slide screen to keep cursor where we expect it -
2193 * tscrollup would work here, but we can optimize to
2194 * memmove because we're freeing the earlier lines */
2195 for(/* i = 0 */; i < slide; i++) {
2196 free(term.line[i]);
2197 free(term.alt[i]);
2198 }
2199 memmove(term.line, term.line + slide, row * sizeof(Line));
2200 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2201 }
2202 for(i += row; i < term.row; i++) {
2203 free(term.line[i]);
2204 free(term.alt[i]);
2205 }
2206
2207 /* resize to new height */
2208 term.line = xrealloc(term.line, row * sizeof(Line));
2209 term.alt = xrealloc(term.alt, row * sizeof(Line));
2210 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2211 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2212
2213 /* resize each row to new width, zero-pad if needed */
2214 for(i = 0; i < minrow; i++) {
2215 term.dirty[i] = 1;
2216 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2217 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2218 for(x = mincol; x < col; x++) {
2219 term.line[i][x].state = 0;
2220 term.alt[i][x].state = 0;
2221 }
2222 }
2223
2224 /* allocate any new rows */
2225 for(/* i == minrow */; i < row; i++) {
2226 term.dirty[i] = 1;
2227 term.line[i] = xcalloc(col, sizeof(Glyph));
2228 term.alt [i] = xcalloc(col, sizeof(Glyph));
2229 }
2230 if(col > term.col) {
2231 bp = term.tabs + term.col;
2232
2233 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2234 while(--bp > term.tabs && !*bp)
2235 /* nothing */ ;
2236 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2237 *bp = 1;
2238 }
2239 /* update terminal size */
2240 term.col = col;
2241 term.row = row;
2242 /* reset scrolling region */
2243 tsetscroll(0, row-1);
2244 /* make use of the LIMIT in tmoveto */
2245 tmoveto(term.c.x, term.c.y);
2246
2247 return (slide > 0);
2248 }
2249
2250 void
2251 xresize(int col, int row) {
2252 xw.tw = MAX(1, col * xw.cw);
2253 xw.th = MAX(1, row * xw.ch);
2254
2255 if(!usedbe) {
2256 XFreePixmap(xw.dpy, xw.buf);
2257 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2258 DefaultDepth(xw.dpy, xw.scr));
2259 XSetForeground(xw.dpy, dc.gc, 0);
2260 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2261 }
2262
2263 XftDrawChange(xw.draw, xw.buf);
2264 }
2265
2266 void
2267 xloadcols(void) {
2268 int i, r, g, b;
2269 XRenderColor color = { .alpha = 0 };
2270
2271 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2272 for(i = 0; i < LEN(colorname); i++) {
2273 if(!colorname[i])
2274 continue;
2275 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2276 die("Could not allocate color '%s'\n", colorname[i]);
2277 }
2278 }
2279
2280 /* load colors [16-255] ; same colors as xterm */
2281 for(i = 16, r = 0; r < 6; r++) {
2282 for(g = 0; g < 6; g++) {
2283 for(b = 0; b < 6; b++) {
2284 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
2285 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
2286 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
2287 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2288 die("Could not allocate color %d\n", i);
2289 }
2290 i++;
2291 }
2292 }
2293 }
2294
2295 for(r = 0; r < 24; r++, i++) {
2296 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2297 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2298 &dc.col[i])) {
2299 die("Could not allocate color %d\n", i);
2300 }
2301 }
2302 }
2303
2304 void
2305 xtermclear(int col1, int row1, int col2, int row2) {
2306 XftDrawRect(xw.draw,
2307 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2308 borderpx + col1 * xw.cw,
2309 borderpx + row1 * xw.ch,
2310 (col2-col1+1) * xw.cw,
2311 (row2-row1+1) * xw.ch);
2312 }
2313
2314 /*
2315 * Absolute coordinates.
2316 */
2317 void
2318 xclear(int x1, int y1, int x2, int y2) {
2319 XftDrawRect(xw.draw,
2320 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2321 x1, y1, x2-x1, y2-y1);
2322 }
2323
2324 void
2325 xhints(void) {
2326 XClassHint class = {opt_class ? opt_class : termname, termname};
2327 XWMHints wm = {.flags = InputHint, .input = 1};
2328 XSizeHints *sizeh = NULL;
2329
2330 sizeh = XAllocSizeHints();
2331 if(xw.isfixed == False) {
2332 sizeh->flags = PSize | PResizeInc | PBaseSize;
2333 sizeh->height = xw.h;
2334 sizeh->width = xw.w;
2335 sizeh->height_inc = xw.ch;
2336 sizeh->width_inc = xw.cw;
2337 sizeh->base_height = 2 * borderpx;
2338 sizeh->base_width = 2 * borderpx;
2339 } else {
2340 sizeh->flags = PMaxSize | PMinSize;
2341 sizeh->min_width = sizeh->max_width = xw.fw;
2342 sizeh->min_height = sizeh->max_height = xw.fh;
2343 }
2344
2345 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2346 XFree(sizeh);
2347 }
2348
2349 int
2350 xloadfont(Font *f, FcPattern *pattern) {
2351 FcPattern *match;
2352 FcResult result;
2353
2354 match = FcFontMatch(NULL, pattern, &result);
2355 if(!match)
2356 return 1;
2357
2358 if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
2359 FcPatternDestroy(match);
2360 return 1;
2361 }
2362
2363 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2364 FcPatternDestroy(match);
2365 return 1;
2366 }
2367
2368 f->pattern = FcPatternDuplicate(pattern);
2369
2370 f->ascent = f->match->ascent;
2371 f->descent = f->match->descent;
2372 f->lbearing = 0;
2373 f->rbearing = f->match->max_advance_width;
2374
2375 f->height = f->match->height;
2376 f->width = f->lbearing + f->rbearing;
2377
2378 return 0;
2379 }
2380
2381 void
2382 xloadfonts(char *fontstr, int fontsize) {
2383 FcPattern *pattern;
2384 FcResult result;
2385 double fontval;
2386
2387 if(fontstr[0] == '-') {
2388 pattern = XftXlfdParse(fontstr, False, False);
2389 } else {
2390 pattern = FcNameParse((FcChar8 *)fontstr);
2391 }
2392
2393 if(!pattern)
2394 die("st: can't open font %s\n", fontstr);
2395
2396 if(fontsize > 0) {
2397 FcPatternDel(pattern, FC_PIXEL_SIZE);
2398 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2399 usedfontsize = fontsize;
2400 } else {
2401 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2402 if(result == FcResultMatch) {
2403 usedfontsize = (int)fontval;
2404 } else {
2405 /*
2406 * Default font size is 12, if none given. This is to
2407 * have a known usedfontsize value.
2408 */
2409 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2410 usedfontsize = 12;
2411 }
2412 }
2413
2414 FcConfigSubstitute(0, pattern, FcMatchPattern);
2415 FcDefaultSubstitute(pattern);
2416
2417 if(xloadfont(&dc.font, pattern))
2418 die("st: can't open font %s\n", fontstr);
2419
2420 /* Setting character width and height. */
2421 xw.cw = dc.font.width;
2422 xw.ch = dc.font.height;
2423
2424 FcPatternDel(pattern, FC_WEIGHT);
2425 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2426 if(xloadfont(&dc.bfont, pattern))
2427 die("st: can't open font %s\n", fontstr);
2428
2429 FcPatternDel(pattern, FC_SLANT);
2430 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2431 if(xloadfont(&dc.ibfont, pattern))
2432 die("st: can't open font %s\n", fontstr);
2433
2434 FcPatternDel(pattern, FC_WEIGHT);
2435 if(xloadfont(&dc.ifont, pattern))
2436 die("st: can't open font %s\n", fontstr);
2437
2438 FcPatternDestroy(pattern);
2439 }
2440
2441 void
2442 xunloadfonts(void)
2443 {
2444 int i, ip;
2445
2446 /*
2447 * Free the loaded fonts in the font cache. This is done backwards
2448 * from the frccur.
2449 */
2450 for (i = 0, ip = frccur; i < frclen; i++, ip--) {
2451 if (ip < 0)
2452 ip = LEN(frc) - 1;
2453 XftFontClose(xw.dpy, frc[ip].font);
2454 }
2455 frccur = -1;
2456 frclen = 0;
2457
2458 XftFontClose(xw.dpy, dc.font.match);
2459 FcPatternDestroy(dc.font.pattern);
2460 FcFontSetDestroy(dc.font.set);
2461 XftFontClose(xw.dpy, dc.bfont.match);
2462 FcPatternDestroy(dc.bfont.pattern);
2463 FcFontSetDestroy(dc.bfont.set);
2464 XftFontClose(xw.dpy, dc.ifont.match);
2465 FcPatternDestroy(dc.ifont.pattern);
2466 FcFontSetDestroy(dc.ifont.set);
2467 XftFontClose(xw.dpy, dc.ibfont.match);
2468 FcPatternDestroy(dc.ibfont.pattern);
2469 FcFontSetDestroy(dc.ibfont.set);
2470 }
2471
2472 void
2473 xzoom(const Arg *arg)
2474 {
2475 xunloadfonts();
2476 xloadfonts(usedfont, usedfontsize + arg->i);
2477 cresize(0, 0);
2478 redraw(0);
2479 }
2480
2481 void
2482 xinit(void) {
2483 XSetWindowAttributes attrs;
2484 XGCValues gcvalues;
2485 Cursor cursor;
2486 Window parent;
2487 int sw, sh, major, minor;
2488
2489 if(!(xw.dpy = XOpenDisplay(NULL)))
2490 die("Can't open display\n");
2491 xw.scr = XDefaultScreen(xw.dpy);
2492 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2493
2494 /* font */
2495 if (!FcInit())
2496 die("Could not init fontconfig.\n");
2497
2498 usedfont = (opt_font == NULL)? font : opt_font;
2499 xloadfonts(usedfont, 0);
2500
2501 /* colors */
2502 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2503 xloadcols();
2504
2505 /* adjust fixed window geometry */
2506 if(xw.isfixed) {
2507 sw = DisplayWidth(xw.dpy, xw.scr);
2508 sh = DisplayHeight(xw.dpy, xw.scr);
2509 if(xw.fx < 0)
2510 xw.fx = sw + xw.fx - xw.fw - 1;
2511 if(xw.fy < 0)
2512 xw.fy = sh + xw.fy - xw.fh - 1;
2513
2514 xw.h = xw.fh;
2515 xw.w = xw.fw;
2516 } else {
2517 /* window - default size */
2518 xw.h = 2 * borderpx + term.row * xw.ch;
2519 xw.w = 2 * borderpx + term.col * xw.cw;
2520 xw.fx = 0;
2521 xw.fy = 0;
2522 }
2523
2524 /* Events */
2525 attrs.background_pixel = dc.col[defaultbg].pixel;
2526 attrs.border_pixel = dc.col[defaultbg].pixel;
2527 attrs.bit_gravity = NorthWestGravity;
2528 attrs.event_mask = FocusChangeMask | KeyPressMask
2529 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2530 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2531 attrs.colormap = xw.cmap;
2532
2533 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2534 XRootWindow(xw.dpy, xw.scr);
2535 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2536 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2537 xw.vis,
2538 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2539 | CWColormap,
2540 &attrs);
2541
2542 /* double buffering */
2543 /*
2544 if(XdbeQueryExtension(xw.dpy, &major, &minor)) {
2545 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win,
2546 XdbeBackground);
2547 usedbe = True;
2548 } else {
2549 */
2550 memset(&gcvalues, 0, sizeof(gcvalues));
2551 gcvalues.graphics_exposures = False;
2552 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2553 &gcvalues);
2554 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2555 DefaultDepth(xw.dpy, xw.scr));
2556 XSetForeground(xw.dpy, dc.gc, 0);
2557 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2558 //xw.buf = xw.win;
2559 /*
2560 }
2561 */
2562
2563 /* Xft rendering context */
2564 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2565
2566 /* input methods */
2567 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2568 XSetLocaleModifiers("@im=local");
2569 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2570 XSetLocaleModifiers("@im=");
2571 if((xw.xim = XOpenIM(xw.dpy,
2572 NULL, NULL, NULL)) == NULL) {
2573 die("XOpenIM failed. Could not open input"
2574 " device.\n");
2575 }
2576 }
2577 }
2578 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2579 | XIMStatusNothing, XNClientWindow, xw.win,
2580 XNFocusWindow, xw.win, NULL);
2581 if(xw.xic == NULL)
2582 die("XCreateIC failed. Could not obtain input method.\n");
2583
2584 /* white cursor, black outline */
2585 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2586 XDefineCursor(xw.dpy, xw.win, cursor);
2587 XRecolorCursor(xw.dpy, cursor,
2588 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2589 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2590
2591 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2592 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2593 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2594
2595 xresettitle();
2596 XMapWindow(xw.dpy, xw.win);
2597 xhints();
2598 XSync(xw.dpy, 0);
2599 }
2600
2601 void
2602 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2603 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2604 width = charlen * xw.cw, xp, i;
2605 int frp, frcflags;
2606 int u8fl, u8fblen, u8cblen, doesexist;
2607 char *u8c, *u8fs;
2608 long u8char;
2609 Font *font = &dc.font;
2610 FcResult fcres;
2611 FcPattern *fcpattern, *fontpattern;
2612 FcFontSet *fcsets[] = { NULL };
2613 FcCharSet *fccharset;
2614 Colour *fg = &dc.col[base.fg], *bg = &dc.col[base.bg],
2615 *temp, revfg, revbg;
2616 XRenderColor colfg, colbg;
2617
2618 frcflags = FRC_NORMAL;
2619
2620 if(base.mode & ATTR_BOLD) {
2621 if(BETWEEN(base.fg, 0, 7)) {
2622 /* basic system colors */
2623 fg = &dc.col[base.fg + 8];
2624 } else if(BETWEEN(base.fg, 16, 195)) {
2625 /* 256 colors */
2626 fg = &dc.col[base.fg + 36];
2627 } else if(BETWEEN(base.fg, 232, 251)) {
2628 /* greyscale */
2629 fg = &dc.col[base.fg + 4];
2630 }
2631 /*
2632 * Those ranges will not be brightened:
2633 * 8 - 15 – bright system colors
2634 * 196 - 231 – highest 256 color cube
2635 * 252 - 255 – brightest colors in greyscale
2636 */
2637 font = &dc.bfont;
2638 frcflags = FRC_BOLD;
2639 }
2640
2641 if(base.mode & ATTR_ITALIC) {
2642 font = &dc.ifont;
2643 frcflags = FRC_ITALIC;
2644 }
2645 if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2646 font = &dc.ibfont;
2647 frcflags = FRC_ITALICBOLD;
2648 }
2649
2650 if(IS_SET(MODE_REVERSE)) {
2651 if(fg == &dc.col[defaultfg]) {
2652 fg = &dc.col[defaultbg];
2653 } else {
2654 colfg.red = ~fg->color.red;
2655 colfg.green = ~fg->color.green;
2656 colfg.blue = ~fg->color.blue;
2657 colfg.alpha = fg->color.alpha;
2658 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2659 fg = &revfg;
2660 }
2661
2662 if(bg == &dc.col[defaultbg]) {
2663 bg = &dc.col[defaultfg];
2664 } else {
2665 colbg.red = ~bg->color.red;
2666 colbg.green = ~bg->color.green;
2667 colbg.blue = ~bg->color.blue;
2668 colbg.alpha = bg->color.alpha;
2669 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2670 bg = &revbg;
2671 }
2672 }
2673
2674 if(base.mode & ATTR_REVERSE) {
2675 temp = fg;
2676 fg = bg;
2677 bg = temp;
2678 }
2679
2680 /* Intelligent cleaning up of the borders. */
2681 if(x == 0) {
2682 xclear(0, (y == 0)? 0 : winy, borderpx,
2683 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2684 }
2685 if(x + charlen >= term.col) {
2686 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2687 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2688 }
2689 if(y == 0)
2690 xclear(winx, 0, winx + width, borderpx);
2691 if(y == term.row-1)
2692 xclear(winx, winy + xw.ch, winx + width, xw.h);
2693
2694 /* Clean up the region we want to draw to. */
2695 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2696
2697 fcsets[0] = font->set;
2698 for (xp = winx; bytelen > 0;) {
2699 /*
2700 * Search for the range in the to be printed string of glyphs
2701 * that are in the main font. Then print that range. If
2702 * some glyph is found that is not in the font, do the
2703 * fallback dance.
2704 */
2705 u8fs = s;
2706 u8fblen = 0;
2707 u8fl = 0;
2708 for (;;) {
2709 u8c = s;
2710 u8cblen = utf8decode(s, &u8char);
2711 s += u8cblen;
2712 bytelen -= u8cblen;
2713
2714 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
2715 if (!doesexist || bytelen <= 0) {
2716 if (bytelen <= 0) {
2717 if (doesexist) {
2718 u8fl++;
2719 u8fblen += u8cblen;
2720 }
2721 }
2722
2723 if (u8fl > 0) {
2724 XftDrawStringUtf8(xw.draw, fg,
2725 font->match, xp,
2726 winy + font->ascent,
2727 (FcChar8 *)u8fs,
2728 u8fblen);
2729 xp += font->width * u8fl;
2730 }
2731 break;
2732 }
2733
2734 u8fl++;
2735 u8fblen += u8cblen;
2736 }
2737 if (doesexist)
2738 break;
2739
2740 frp = frccur;
2741 /* Search the font cache. */
2742 for (i = 0; i < frclen; i++, frp--) {
2743 if (frp <= 0)
2744 frp = LEN(frc) - 1;
2745
2746 if (frc[frp].c == u8char
2747 && frc[frp].flags == frcflags) {
2748 break;
2749 }
2750 }
2751
2752 /* Nothing was found. */
2753 if (i >= frclen) {
2754 /*
2755 * Nothing was found in the cache. Now use
2756 * some dozen of Fontconfig calls to get the
2757 * font for one single character.
2758 */
2759 fcpattern = FcPatternDuplicate(font->pattern);
2760 fccharset = FcCharSetCreate();
2761
2762 FcCharSetAddChar(fccharset, u8char);
2763 FcPatternAddCharSet(fcpattern, FC_CHARSET,
2764 fccharset);
2765 FcPatternAddBool(fcpattern, FC_SCALABLE,
2766 FcTrue);
2767
2768 FcConfigSubstitute(0, fcpattern,
2769 FcMatchPattern);
2770 FcDefaultSubstitute(fcpattern);
2771
2772 fontpattern = FcFontSetMatch(0, fcsets,
2773 FcTrue, fcpattern, &fcres);
2774
2775 /*
2776 * Overwrite or create the new cache entry
2777 * entry.
2778 */
2779 frccur++;
2780 frclen++;
2781 if (frccur >= LEN(frc))
2782 frccur = 0;
2783 if (frclen > LEN(frc)) {
2784 frclen = LEN(frc);
2785 XftFontClose(xw.dpy, frc[frccur].font);
2786 }
2787
2788 frc[frccur].font = XftFontOpenPattern(xw.dpy,
2789 fontpattern);
2790 frc[frccur].c = u8char;
2791 frc[frccur].flags = frcflags;
2792
2793 FcPatternDestroy(fcpattern);
2794 FcCharSetDestroy(fccharset);
2795
2796 frp = frccur;
2797 }
2798
2799 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
2800 xp, winy + frc[frp].font->ascent,
2801 (FcChar8 *)u8c, u8cblen);
2802
2803 xp += font->width;
2804 }
2805
2806 /*
2807 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
2808 winy + font->ascent, (FcChar8 *)s, bytelen);
2809 */
2810
2811 if(base.mode & ATTR_UNDERLINE) {
2812 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
2813 width, 1);
2814 }
2815 }
2816
2817 void
2818 xdrawcursor(void) {
2819 static int oldx = 0, oldy = 0;
2820 int sl;
2821 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs, 0};
2822
2823 LIMIT(oldx, 0, term.col-1);
2824 LIMIT(oldy, 0, term.row-1);
2825
2826 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2827 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2828
2829 /* remove the old cursor */
2830 if(term.line[oldy][oldx].state & GLYPH_SET) {
2831 sl = utf8size(term.line[oldy][oldx].c);
2832 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2833 oldy, 1, sl);
2834 } else {
2835 xtermclear(oldx, oldy, oldx, oldy);
2836 }
2837
2838 /* draw the new one */
2839 if(!(IS_SET(MODE_HIDE))) {
2840 if(!(xw.state & WIN_FOCUSED))
2841 g.bg = defaultucs;
2842
2843 if(IS_SET(MODE_REVERSE))
2844 g.mode |= ATTR_REVERSE, g.fg = defaultcs, g.bg = defaultfg;
2845
2846 sl = utf8size(g.c);
2847 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2848 oldx = term.c.x, oldy = term.c.y;
2849 }
2850 }
2851
2852 void
2853 xresettitle(void) {
2854 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
2855 }
2856
2857 void
2858 redraw(int timeout) {
2859 struct timespec tv = {0, timeout * 1000};
2860
2861 tfulldirt();
2862 draw();
2863
2864 if(timeout > 0) {
2865 nanosleep(&tv, NULL);
2866 XSync(xw.dpy, False); /* necessary for a good tput flash */
2867 }
2868 }
2869
2870 void
2871 draw(void) {
2872 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2873
2874 drawregion(0, 0, term.col, term.row);
2875 if(usedbe) {
2876 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2877 } else {
2878 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
2879 xw.h, 0, 0);
2880 XSetForeground(xw.dpy, dc.gc, 0);
2881 }
2882 }
2883
2884 void
2885 drawregion(int x1, int y1, int x2, int y2) {
2886 int ic, ib, x, y, ox, sl;
2887 Glyph base, new;
2888 char buf[DRAW_BUF_SIZ];
2889 bool ena_sel = sel.bx != -1;
2890
2891 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
2892 ena_sel = 0;
2893
2894 if(!(xw.state & WIN_VISIBLE))
2895 return;
2896
2897 for(y = y1; y < y2; y++) {
2898 if(!term.dirty[y])
2899 continue;
2900
2901 xtermclear(0, y, term.col, y);
2902 term.dirty[y] = 0;
2903 base = term.line[y][0];
2904 ic = ib = ox = 0;
2905 for(x = x1; x < x2; x++) {
2906 new = term.line[y][x];
2907 if(ena_sel && *(new.c) && selected(x, y))
2908 new.mode ^= ATTR_REVERSE;
2909 if(ib > 0 && (!(new.state & GLYPH_SET)
2910 || ATTRCMP(base, new)
2911 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2912 xdraws(buf, base, ox, y, ic, ib);
2913 ic = ib = 0;
2914 }
2915 if(new.state & GLYPH_SET) {
2916 if(ib == 0) {
2917 ox = x;
2918 base = new;
2919 }
2920
2921 sl = utf8size(new.c);
2922 memcpy(buf+ib, new.c, sl);
2923 ib += sl;
2924 ++ic;
2925 }
2926 }
2927 if(ib > 0)
2928 xdraws(buf, base, ox, y, ic, ib);
2929 }
2930 xdrawcursor();
2931 }
2932
2933 void
2934 expose(XEvent *ev) {
2935 XExposeEvent *e = &ev->xexpose;
2936
2937 if(xw.state & WIN_REDRAW) {
2938 if(!e->count)
2939 xw.state &= ~WIN_REDRAW;
2940 }
2941 redraw(0);
2942 }
2943
2944 void
2945 visibility(XEvent *ev) {
2946 XVisibilityEvent *e = &ev->xvisibility;
2947
2948 if(e->state == VisibilityFullyObscured) {
2949 xw.state &= ~WIN_VISIBLE;
2950 } else if(!(xw.state & WIN_VISIBLE)) {
2951 /* need a full redraw for next Expose, not just a buf copy */
2952 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2953 }
2954 }
2955
2956 void
2957 unmap(XEvent *ev) {
2958 xw.state &= ~WIN_VISIBLE;
2959 }
2960
2961 void
2962 xseturgency(int add) {
2963 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2964
2965 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2966 XSetWMHints(xw.dpy, xw.win, h);
2967 XFree(h);
2968 }
2969
2970 void
2971 focus(XEvent *ev) {
2972 if(ev->type == FocusIn) {
2973 XSetICFocus(xw.xic);
2974 xw.state |= WIN_FOCUSED;
2975 xseturgency(0);
2976 } else {
2977 XUnsetICFocus(xw.xic);
2978 xw.state &= ~WIN_FOCUSED;
2979 }
2980 }
2981
2982 inline bool
2983 match(uint mask, uint state) {
2984 if(mask == XK_NO_MOD && state)
2985 return false;
2986 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
2987 return false;
2988 if((state & mask) != state)
2989 return false;
2990 return true;
2991 }
2992
2993 void
2994 numlock(const Arg *dummy) {
2995 term.numlock ^= 1;
2996 }
2997
2998 char*
2999 kmap(KeySym k, uint state) {
3000 uint mask;
3001 Key *kp;
3002 int i;
3003
3004 /* Check for mapped keys out of X11 function keys. */
3005 for(i = 0; i < LEN(mappedkeys); i++) {
3006 if(mappedkeys[i] == k)
3007 break;
3008 }
3009 if(i == LEN(mappedkeys)) {
3010 if((k & 0xFFFF) < 0xFD00)
3011 return NULL;
3012 }
3013
3014 for(kp = key; kp < key + LEN(key); kp++) {
3015 mask = kp->mask;
3016
3017 if(kp->k != k)
3018 continue;
3019
3020 if(!match(mask, state))
3021 continue;
3022
3023 if(kp->appkey > 0) {
3024 if(!IS_SET(MODE_APPKEYPAD))
3025 continue;
3026 if(term.numlock && kp->appkey == 2)
3027 continue;
3028 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3029 continue;
3030 }
3031
3032 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3033 (kp->appcursor > 0
3034 && !IS_SET(MODE_APPCURSOR))) {
3035 continue;
3036 }
3037
3038 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3039 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3040 continue;
3041 }
3042
3043 return kp->s;
3044 }
3045
3046 return NULL;
3047 }
3048
3049 void
3050 kpress(XEvent *ev) {
3051 XKeyEvent *e = &ev->xkey;
3052 KeySym ksym;
3053 char xstr[31], buf[32], *customkey, *cp = buf;
3054 int len;
3055 Status status;
3056 Shortcut *bp;
3057
3058 if (IS_SET(MODE_KBDLOCK))
3059 return;
3060
3061 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3062 e->state &= ~Mod2Mask;
3063 /* 1. shortcuts */
3064 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3065 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3066 bp->func(&(bp->arg));
3067 return;
3068 }
3069 }
3070
3071 /* 2. custom keys from config.h */
3072 if((customkey = kmap(ksym, e->state))) {
3073 len = strlen(customkey);
3074 memcpy(buf, customkey, len);
3075 /* 2. hardcoded (overrides X lookup) */
3076 } else {
3077 if(len == 0)
3078 return;
3079
3080 if (len == 1 && e->state & Mod1Mask)
3081 *cp++ = '\033';
3082
3083 memcpy(cp, xstr, len);
3084 len = cp - buf + len;
3085 }
3086
3087 ttywrite(buf, len);
3088 if(IS_SET(MODE_ECHO))
3089 techo(buf, len);
3090 }
3091
3092
3093 void
3094 cmessage(XEvent *e) {
3095 /* See xembed specs
3096 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
3097 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3098 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3099 xw.state |= WIN_FOCUSED;
3100 xseturgency(0);
3101 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3102 xw.state &= ~WIN_FOCUSED;
3103 }
3104 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3105 /* Send SIGHUP to shell */
3106 kill(pid, SIGHUP);
3107 exit(EXIT_SUCCESS);
3108 }
3109 }
3110
3111 void
3112 cresize(int width, int height)
3113 {
3114 int col, row;
3115
3116 if(width != 0)
3117 xw.w = width;
3118 if(height != 0)
3119 xw.h = height;
3120
3121 col = (xw.w - 2 * borderpx) / xw.cw;
3122 row = (xw.h - 2 * borderpx) / xw.ch;
3123
3124 tresize(col, row);
3125 xresize(col, row);
3126 ttyresize();
3127 }
3128
3129 void
3130 resize(XEvent *e) {
3131 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3132 return;
3133
3134 cresize(e->xconfigure.width, e->xconfigure.height);
3135 }
3136
3137 void
3138 run(void) {
3139 XEvent ev;
3140 fd_set rfd;
3141 int xfd = XConnectionNumber(xw.dpy), i;
3142 struct timeval drawtimeout, *tv = NULL;
3143
3144 for(i = 0;; i++) {
3145 FD_ZERO(&rfd);
3146 FD_SET(cmdfd, &rfd);
3147 FD_SET(xfd, &rfd);
3148 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3149 if(errno == EINTR)
3150 continue;
3151 die("select failed: %s\n", SERRNO);
3152 }
3153
3154 /*
3155 * Stop after a certain number of reads so the user does not
3156 * feel like the system is stuttering.
3157 */
3158 if(i < 1000 && FD_ISSET(cmdfd, &rfd)) {
3159 ttyread();
3160
3161 /*
3162 * Just wait a bit so it isn't disturbing the
3163 * user and the system is able to write something.
3164 */
3165 drawtimeout.tv_sec = 0;
3166 drawtimeout.tv_usec = 5;
3167 tv = &drawtimeout;
3168 continue;
3169 }
3170 i = 0;
3171 tv = NULL;
3172
3173 while(XPending(xw.dpy)) {
3174 XNextEvent(xw.dpy, &ev);
3175 if(XFilterEvent(&ev, None))
3176 continue;
3177 if(handler[ev.type])
3178 (handler[ev.type])(&ev);
3179 }
3180
3181 draw();
3182 XFlush(xw.dpy);
3183 }
3184 }
3185
3186 int
3187 main(int argc, char *argv[]) {
3188 int i, bitm, xr, yr;
3189 uint wr, hr;
3190
3191 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3192 xw.isfixed = False;
3193
3194 for(i = 1; i < argc; i++) {
3195 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
3196 case 'c':
3197 if(++i < argc)
3198 opt_class = argv[i];
3199 break;
3200 case 'e':
3201 /* eat all remaining arguments */
3202 if(++i < argc)
3203 opt_cmd = &argv[i];
3204 goto run;
3205 case 'f':
3206 if(++i < argc)
3207 opt_font = argv[i];
3208 break;
3209 case 'g':
3210 if(++i >= argc)
3211 break;
3212
3213 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
3214 if(bitm & XValue)
3215 xw.fx = xr;
3216 if(bitm & YValue)
3217 xw.fy = yr;
3218 if(bitm & WidthValue)
3219 xw.fw = (int)wr;
3220 if(bitm & HeightValue)
3221 xw.fh = (int)hr;
3222 if(bitm & XNegative && xw.fx == 0)
3223 xw.fx = -1;
3224 if(bitm & XNegative && xw.fy == 0)
3225 xw.fy = -1;
3226
3227 if(xw.fh != 0 && xw.fw != 0)
3228 xw.isfixed = True;
3229 break;
3230 case 'o':
3231 if(++i < argc)
3232 opt_io = argv[i];
3233 break;
3234 case 't':
3235 if(++i < argc)
3236 opt_title = argv[i];
3237 break;
3238 case 'v':
3239 default:
3240 die(USAGE);
3241 case 'w':
3242 if(++i < argc)
3243 opt_embed = argv[i];
3244 break;
3245 }
3246 }
3247
3248 run:
3249 setlocale(LC_CTYPE, "");
3250 XSetLocaleModifiers("");
3251 tnew(80, 24);
3252 xinit();
3253 ttynew();
3254 selinit();
3255 run();
3256
3257 return 0;
3258 }
3259