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Dbe is not required anymore.
[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) 2010-2012 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; /* window width */
217 int h; /* window height */
218 int ch; /* char height */
219 int cw; /* char width */
220 char state; /* focus, redraw, visible */
221 } XWindow;
222
223 typedef struct {
224 KeySym k;
225 uint mask;
226 char s[ESC_BUF_SIZ];
227 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
228 signed char appkey; /* application keypad */
229 signed char appcursor; /* application cursor */
230 signed char crlf; /* crlf mode */
231 } Key;
232
233 /* TODO: use better name for vars... */
234 typedef struct {
235 int mode;
236 int bx, by;
237 int ex, ey;
238 struct {
239 int x, y;
240 } b, e;
241 char *clip;
242 Atom xtarget;
243 bool alt;
244 struct timeval tclick1;
245 struct timeval tclick2;
246 } Selection;
247
248 typedef union {
249 int i;
250 unsigned int ui;
251 float f;
252 const void *v;
253 } Arg;
254
255 typedef struct {
256 unsigned int mod;
257 KeySym keysym;
258 void (*func)(const Arg *);
259 const Arg arg;
260 } Shortcut;
261
262 /* function definitions used in config.h */
263 static void xzoom(const Arg *);
264 static void selpaste(const Arg *);
265 static void numlock(const Arg *);
266
267 /* Config.h for applying patches and the configuration. */
268 #include "config.h"
269
270 /* Font structure */
271 typedef struct {
272 int height;
273 int width;
274 int ascent;
275 int descent;
276 short lbearing;
277 short rbearing;
278 XftFont *match;
279 FcFontSet *set;
280 FcPattern *pattern;
281 } Font;
282
283 /* Drawing Context */
284 typedef struct {
285 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
286 Font font, bfont, ifont, ibfont;
287 } DC;
288
289 static void die(const char *, ...);
290 static void draw(void);
291 static void redraw(void);
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);
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);
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);
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);
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) {
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 term.line[y][x].state = 0;
1325 }
1326 }
1327
1328 void
1329 tdeletechar(int n) {
1330 int src = term.c.x + n;
1331 int dst = term.c.x;
1332 int size = term.col - src;
1333
1334 term.dirty[term.c.y] = 1;
1335
1336 if(src >= term.col) {
1337 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1338 return;
1339 }
1340
1341 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1342 size * sizeof(Glyph));
1343 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1344 }
1345
1346 void
1347 tinsertblank(int n) {
1348 int src = term.c.x;
1349 int dst = src + n;
1350 int size = term.col - dst;
1351
1352 term.dirty[term.c.y] = 1;
1353
1354 if(dst >= term.col) {
1355 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1356 return;
1357 }
1358
1359 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1360 size * sizeof(Glyph));
1361 tclearregion(src, term.c.y, dst - 1, term.c.y);
1362 }
1363
1364 void
1365 tinsertblankline(int n) {
1366 if(term.c.y < term.top || term.c.y > term.bot)
1367 return;
1368
1369 tscrolldown(term.c.y, n);
1370 }
1371
1372 void
1373 tdeleteline(int n) {
1374 if(term.c.y < term.top || term.c.y > term.bot)
1375 return;
1376
1377 tscrollup(term.c.y, n);
1378 }
1379
1380 void
1381 tsetattr(int *attr, int l) {
1382 int i;
1383
1384 for(i = 0; i < l; i++) {
1385 switch(attr[i]) {
1386 case 0:
1387 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1388 | ATTR_ITALIC | ATTR_BLINK);
1389 term.c.attr.fg = defaultfg;
1390 term.c.attr.bg = defaultbg;
1391 break;
1392 case 1:
1393 term.c.attr.mode |= ATTR_BOLD;
1394 break;
1395 case 3:
1396 term.c.attr.mode |= ATTR_ITALIC;
1397 break;
1398 case 4:
1399 term.c.attr.mode |= ATTR_UNDERLINE;
1400 break;
1401 case 5:
1402 term.c.attr.mode |= ATTR_BLINK;
1403 break;
1404 case 7:
1405 term.c.attr.mode |= ATTR_REVERSE;
1406 break;
1407 case 21:
1408 case 22:
1409 term.c.attr.mode &= ~ATTR_BOLD;
1410 break;
1411 case 23:
1412 term.c.attr.mode &= ~ATTR_ITALIC;
1413 break;
1414 case 24:
1415 term.c.attr.mode &= ~ATTR_UNDERLINE;
1416 break;
1417 case 25:
1418 term.c.attr.mode &= ~ATTR_BLINK;
1419 break;
1420 case 27:
1421 term.c.attr.mode &= ~ATTR_REVERSE;
1422 break;
1423 case 38:
1424 if(i + 2 < l && attr[i + 1] == 5) {
1425 i += 2;
1426 if(BETWEEN(attr[i], 0, 255)) {
1427 term.c.attr.fg = attr[i];
1428 } else {
1429 fprintf(stderr,
1430 "erresc: bad fgcolor %d\n",
1431 attr[i]);
1432 }
1433 } else {
1434 fprintf(stderr,
1435 "erresc(38): gfx attr %d unknown\n",
1436 attr[i]);
1437 }
1438 break;
1439 case 39:
1440 term.c.attr.fg = defaultfg;
1441 break;
1442 case 48:
1443 if(i + 2 < l && attr[i + 1] == 5) {
1444 i += 2;
1445 if(BETWEEN(attr[i], 0, 255)) {
1446 term.c.attr.bg = attr[i];
1447 } else {
1448 fprintf(stderr,
1449 "erresc: bad bgcolor %d\n",
1450 attr[i]);
1451 }
1452 } else {
1453 fprintf(stderr,
1454 "erresc(48): gfx attr %d unknown\n",
1455 attr[i]);
1456 }
1457 break;
1458 case 49:
1459 term.c.attr.bg = defaultbg;
1460 break;
1461 default:
1462 if(BETWEEN(attr[i], 30, 37)) {
1463 term.c.attr.fg = attr[i] - 30;
1464 } else if(BETWEEN(attr[i], 40, 47)) {
1465 term.c.attr.bg = attr[i] - 40;
1466 } else if(BETWEEN(attr[i], 90, 97)) {
1467 term.c.attr.fg = attr[i] - 90 + 8;
1468 } else if(BETWEEN(attr[i], 100, 107)) {
1469 term.c.attr.bg = attr[i] - 100 + 8;
1470 } else {
1471 fprintf(stderr,
1472 "erresc(default): gfx attr %d unknown\n",
1473 attr[i]), csidump();
1474 }
1475 break;
1476 }
1477 }
1478 }
1479
1480 void
1481 tsetscroll(int t, int b) {
1482 int temp;
1483
1484 LIMIT(t, 0, term.row-1);
1485 LIMIT(b, 0, term.row-1);
1486 if(t > b) {
1487 temp = t;
1488 t = b;
1489 b = temp;
1490 }
1491 term.top = t;
1492 term.bot = b;
1493 }
1494
1495 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1496
1497 void
1498 tsetmode(bool priv, bool set, int *args, int narg) {
1499 int *lim, mode;
1500 bool alt;
1501
1502 for(lim = args + narg; args < lim; ++args) {
1503 if(priv) {
1504 switch(*args) {
1505 break;
1506 case 1: /* DECCKM -- Cursor key */
1507 MODBIT(term.mode, set, MODE_APPCURSOR);
1508 break;
1509 case 5: /* DECSCNM -- Reverse video */
1510 mode = term.mode;
1511 MODBIT(term.mode, set, MODE_REVERSE);
1512 if(mode != term.mode)
1513 redraw();
1514 break;
1515 case 6: /* DECOM -- Origin */
1516 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1517 tmoveato(0, 0);
1518 break;
1519 case 7: /* DECAWM -- Auto wrap */
1520 MODBIT(term.mode, set, MODE_WRAP);
1521 break;
1522 case 0: /* Error (IGNORED) */
1523 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1524 case 3: /* DECCOLM -- Column (IGNORED) */
1525 case 4: /* DECSCLM -- Scroll (IGNORED) */
1526 case 8: /* DECARM -- Auto repeat (IGNORED) */
1527 case 18: /* DECPFF -- Printer feed (IGNORED) */
1528 case 19: /* DECPEX -- Printer extent (IGNORED) */
1529 case 42: /* DECNRCM -- National characters (IGNORED) */
1530 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1531 break;
1532 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1533 MODBIT(term.mode, !set, MODE_HIDE);
1534 break;
1535 case 1000: /* 1000,1002: enable xterm mouse report */
1536 MODBIT(term.mode, set, MODE_MOUSEBTN);
1537 break;
1538 case 1002:
1539 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1540 break;
1541 case 1049: /* = 1047 and 1048 */
1542 case 47:
1543 case 1047: {
1544 alt = IS_SET(MODE_ALTSCREEN);
1545 if(alt)
1546 tclearregion(0, 0, term.col-1, term.row-1);
1547 if(set ^ alt) /* set is always 1 or 0 */
1548 tswapscreen();
1549 if(*args != 1049)
1550 break;
1551 }
1552 /* pass through */
1553 case 1048:
1554 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1555 break;
1556 default:
1557 fprintf(stderr,
1558 "erresc: unknown private set/reset mode %d\n",
1559 *args);
1560 break;
1561 }
1562 } else {
1563 switch(*args) {
1564 case 0: /* Error (IGNORED) */
1565 break;
1566 case 2: /* KAM -- keyboard action */
1567 MODBIT(term.mode, set, MODE_KBDLOCK);
1568 break;
1569 case 4: /* IRM -- Insertion-replacement */
1570 MODBIT(term.mode, set, MODE_INSERT);
1571 break;
1572 case 12: /* SRM -- Send/Receive */
1573 MODBIT(term.mode, !set, MODE_ECHO);
1574 break;
1575 case 20: /* LNM -- Linefeed/new line */
1576 MODBIT(term.mode, set, MODE_CRLF);
1577 break;
1578 default:
1579 fprintf(stderr,
1580 "erresc: unknown set/reset mode %d\n",
1581 *args);
1582 break;
1583 }
1584 }
1585 }
1586 }
1587 #undef MODBIT
1588
1589
1590 void
1591 csihandle(void) {
1592 switch(csiescseq.mode) {
1593 default:
1594 unknown:
1595 fprintf(stderr, "erresc: unknown csi ");
1596 csidump();
1597 /* die(""); */
1598 break;
1599 case '@': /* ICH -- Insert <n> blank char */
1600 DEFAULT(csiescseq.arg[0], 1);
1601 tinsertblank(csiescseq.arg[0]);
1602 break;
1603 case 'A': /* CUU -- Cursor <n> Up */
1604 DEFAULT(csiescseq.arg[0], 1);
1605 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1606 break;
1607 case 'B': /* CUD -- Cursor <n> Down */
1608 case 'e': /* VPR --Cursor <n> Down */
1609 DEFAULT(csiescseq.arg[0], 1);
1610 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1611 break;
1612 case 'c': /* DA -- Device Attributes */
1613 if(csiescseq.arg[0] == 0)
1614 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1615 break;
1616 case 'C': /* CUF -- Cursor <n> Forward */
1617 case 'a': /* HPR -- Cursor <n> Forward */
1618 DEFAULT(csiescseq.arg[0], 1);
1619 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1620 break;
1621 case 'D': /* CUB -- Cursor <n> Backward */
1622 DEFAULT(csiescseq.arg[0], 1);
1623 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1624 break;
1625 case 'E': /* CNL -- Cursor <n> Down and first col */
1626 DEFAULT(csiescseq.arg[0], 1);
1627 tmoveto(0, term.c.y+csiescseq.arg[0]);
1628 break;
1629 case 'F': /* CPL -- Cursor <n> Up and first col */
1630 DEFAULT(csiescseq.arg[0], 1);
1631 tmoveto(0, term.c.y-csiescseq.arg[0]);
1632 break;
1633 case 'g': /* TBC -- Tabulation clear */
1634 switch (csiescseq.arg[0]) {
1635 case 0: /* clear current tab stop */
1636 term.tabs[term.c.x] = 0;
1637 break;
1638 case 3: /* clear all the tabs */
1639 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1640 break;
1641 default:
1642 goto unknown;
1643 }
1644 break;
1645 case 'G': /* CHA -- Move to <col> */
1646 case '`': /* HPA */
1647 DEFAULT(csiescseq.arg[0], 1);
1648 tmoveto(csiescseq.arg[0]-1, term.c.y);
1649 break;
1650 case 'H': /* CUP -- Move to <row> <col> */
1651 case 'f': /* HVP */
1652 DEFAULT(csiescseq.arg[0], 1);
1653 DEFAULT(csiescseq.arg[1], 1);
1654 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1655 break;
1656 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1657 DEFAULT(csiescseq.arg[0], 1);
1658 while(csiescseq.arg[0]--)
1659 tputtab(1);
1660 break;
1661 case 'J': /* ED -- Clear screen */
1662 sel.bx = -1;
1663 switch(csiescseq.arg[0]) {
1664 case 0: /* below */
1665 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1666 if(term.c.y < term.row-1)
1667 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1668 break;
1669 case 1: /* above */
1670 if(term.c.y > 1)
1671 tclearregion(0, 0, term.col-1, term.c.y-1);
1672 tclearregion(0, term.c.y, term.c.x, term.c.y);
1673 break;
1674 case 2: /* all */
1675 tclearregion(0, 0, term.col-1, term.row-1);
1676 break;
1677 default:
1678 goto unknown;
1679 }
1680 break;
1681 case 'K': /* EL -- Clear line */
1682 switch(csiescseq.arg[0]) {
1683 case 0: /* right */
1684 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1685 break;
1686 case 1: /* left */
1687 tclearregion(0, term.c.y, term.c.x, term.c.y);
1688 break;
1689 case 2: /* all */
1690 tclearregion(0, term.c.y, term.col-1, term.c.y);
1691 break;
1692 }
1693 break;
1694 case 'S': /* SU -- Scroll <n> line up */
1695 DEFAULT(csiescseq.arg[0], 1);
1696 tscrollup(term.top, csiescseq.arg[0]);
1697 break;
1698 case 'T': /* SD -- Scroll <n> line down */
1699 DEFAULT(csiescseq.arg[0], 1);
1700 tscrolldown(term.top, csiescseq.arg[0]);
1701 break;
1702 case 'L': /* IL -- Insert <n> blank lines */
1703 DEFAULT(csiescseq.arg[0], 1);
1704 tinsertblankline(csiescseq.arg[0]);
1705 break;
1706 case 'l': /* RM -- Reset Mode */
1707 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1708 break;
1709 case 'M': /* DL -- Delete <n> lines */
1710 DEFAULT(csiescseq.arg[0], 1);
1711 tdeleteline(csiescseq.arg[0]);
1712 break;
1713 case 'X': /* ECH -- Erase <n> char */
1714 DEFAULT(csiescseq.arg[0], 1);
1715 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
1716 break;
1717 case 'P': /* DCH -- Delete <n> char */
1718 DEFAULT(csiescseq.arg[0], 1);
1719 tdeletechar(csiescseq.arg[0]);
1720 break;
1721 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1722 DEFAULT(csiescseq.arg[0], 1);
1723 while(csiescseq.arg[0]--)
1724 tputtab(0);
1725 break;
1726 case 'd': /* VPA -- Move to <row> */
1727 DEFAULT(csiescseq.arg[0], 1);
1728 tmoveato(term.c.x, csiescseq.arg[0]-1);
1729 break;
1730 case 'h': /* SM -- Set terminal mode */
1731 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1732 break;
1733 case 'm': /* SGR -- Terminal attribute (color) */
1734 tsetattr(csiescseq.arg, csiescseq.narg);
1735 break;
1736 case 'r': /* DECSTBM -- Set Scrolling Region */
1737 if(csiescseq.priv) {
1738 goto unknown;
1739 } else {
1740 DEFAULT(csiescseq.arg[0], 1);
1741 DEFAULT(csiescseq.arg[1], term.row);
1742 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1743 tmoveato(0, 0);
1744 }
1745 break;
1746 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1747 tcursor(CURSOR_SAVE);
1748 break;
1749 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1750 tcursor(CURSOR_LOAD);
1751 break;
1752 }
1753 }
1754
1755 void
1756 csidump(void) {
1757 int i;
1758 uint c;
1759
1760 printf("ESC[");
1761 for(i = 0; i < csiescseq.len; i++) {
1762 c = csiescseq.buf[i] & 0xff;
1763 if(isprint(c)) {
1764 putchar(c);
1765 } else if(c == '\n') {
1766 printf("(\\n)");
1767 } else if(c == '\r') {
1768 printf("(\\r)");
1769 } else if(c == 0x1b) {
1770 printf("(\\e)");
1771 } else {
1772 printf("(%02x)", c);
1773 }
1774 }
1775 putchar('\n');
1776 }
1777
1778 void
1779 csireset(void) {
1780 memset(&csiescseq, 0, sizeof(csiescseq));
1781 }
1782
1783 void
1784 strhandle(void) {
1785 char *p;
1786
1787 /*
1788 * TODO: make this being useful in case of color palette change.
1789 */
1790 strparse();
1791
1792 p = strescseq.buf;
1793
1794 switch(strescseq.type) {
1795 case ']': /* OSC -- Operating System Command */
1796 switch(p[0]) {
1797 case '0':
1798 case '1':
1799 case '2':
1800 /*
1801 * TODO: Handle special chars in string, like umlauts.
1802 */
1803 if(p[1] == ';') {
1804 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1805 }
1806 break;
1807 case ';':
1808 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1809 break;
1810 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1811 break;
1812 default:
1813 fprintf(stderr, "erresc: unknown str ");
1814 strdump();
1815 break;
1816 }
1817 break;
1818 case 'k': /* old title set compatibility */
1819 XStoreName(xw.dpy, xw.win, strescseq.buf);
1820 break;
1821 case 'P': /* DSC -- Device Control String */
1822 case '_': /* APC -- Application Program Command */
1823 case '^': /* PM -- Privacy Message */
1824 default:
1825 fprintf(stderr, "erresc: unknown str ");
1826 strdump();
1827 /* die(""); */
1828 break;
1829 }
1830 }
1831
1832 void
1833 strparse(void) {
1834 /*
1835 * TODO: Implement parsing like for CSI when required.
1836 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1837 */
1838 return;
1839 }
1840
1841 void
1842 strdump(void) {
1843 int i;
1844 uint c;
1845
1846 printf("ESC%c", strescseq.type);
1847 for(i = 0; i < strescseq.len; i++) {
1848 c = strescseq.buf[i] & 0xff;
1849 if(isprint(c)) {
1850 putchar(c);
1851 } else if(c == '\n') {
1852 printf("(\\n)");
1853 } else if(c == '\r') {
1854 printf("(\\r)");
1855 } else if(c == 0x1b) {
1856 printf("(\\e)");
1857 } else {
1858 printf("(%02x)", c);
1859 }
1860 }
1861 printf("ESC\\\n");
1862 }
1863
1864 void
1865 strreset(void) {
1866 memset(&strescseq, 0, sizeof(strescseq));
1867 }
1868
1869 void
1870 tputtab(bool forward) {
1871 uint x = term.c.x;
1872
1873 if(forward) {
1874 if(x == term.col)
1875 return;
1876 for(++x; x < term.col && !term.tabs[x]; ++x)
1877 /* nothing */ ;
1878 } else {
1879 if(x == 0)
1880 return;
1881 for(--x; x > 0 && !term.tabs[x]; --x)
1882 /* nothing */ ;
1883 }
1884 tmoveto(x, term.c.y);
1885 }
1886
1887 void
1888 techo(char *buf, int len) {
1889 for(; len > 0; buf++, len--) {
1890 char c = *buf;
1891
1892 if(c == '\033') { /* escape */
1893 tputc("^", 1);
1894 tputc("[", 1);
1895 } else if (c < '\x20') { /* control code */
1896 if(c != '\n' && c != '\r' && c != '\t') {
1897 c |= '\x40';
1898 tputc("^", 1);
1899 }
1900 tputc(&c, 1);
1901 } else {
1902 break;
1903 }
1904 }
1905 if (len)
1906 tputc(buf, len);
1907 }
1908
1909 void
1910 tputc(char *c, int len) {
1911 uchar ascii = *c;
1912 bool control = ascii < '\x20' || ascii == 0177;
1913
1914 if(iofd != -1) {
1915 if (xwrite(iofd, c, len) < 0) {
1916 fprintf(stderr, "Error writing in %s:%s\n",
1917 opt_io, strerror(errno));
1918 close(iofd);
1919 iofd = -1;
1920 }
1921 }
1922
1923 /*
1924 * STR sequences must be checked before anything else
1925 * because it can use some control codes as part of the sequence.
1926 */
1927 if(term.esc & ESC_STR) {
1928 switch(ascii) {
1929 case '\033':
1930 term.esc = ESC_START | ESC_STR_END;
1931 break;
1932 case '\a': /* backwards compatibility to xterm */
1933 term.esc = 0;
1934 strhandle();
1935 break;
1936 default:
1937 if(strescseq.len + len < sizeof(strescseq.buf)) {
1938 memmove(&strescseq.buf[strescseq.len], c, len);
1939 strescseq.len += len;
1940 } else {
1941 /*
1942 * Here is a bug in terminals. If the user never sends
1943 * some code to stop the str or esc command, then st
1944 * will stop responding. But this is better than
1945 * silently failing with unknown characters. At least
1946 * then users will report back.
1947 *
1948 * In the case users ever get fixed, here is the code:
1949 */
1950 /*
1951 * term.esc = 0;
1952 * strhandle();
1953 */
1954 }
1955 }
1956 return;
1957 }
1958
1959 /*
1960 * Actions of control codes must be performed as soon they arrive
1961 * because they can be embedded inside a control sequence, and
1962 * they must not cause conflicts with sequences.
1963 */
1964 if(control) {
1965 switch(ascii) {
1966 case '\t': /* HT */
1967 tputtab(1);
1968 return;
1969 case '\b': /* BS */
1970 tmoveto(term.c.x-1, term.c.y);
1971 return;
1972 case '\r': /* CR */
1973 tmoveto(0, term.c.y);
1974 return;
1975 case '\f': /* LF */
1976 case '\v': /* VT */
1977 case '\n': /* LF */
1978 /* go to first col if the mode is set */
1979 tnewline(IS_SET(MODE_CRLF));
1980 return;
1981 case '\a': /* BEL */
1982 if(!(xw.state & WIN_FOCUSED))
1983 xseturgency(1);
1984 return;
1985 case '\033': /* ESC */
1986 csireset();
1987 term.esc = ESC_START;
1988 return;
1989 case '\016': /* SO */
1990 term.c.attr.mode |= ATTR_GFX;
1991 return;
1992 case '\017': /* SI */
1993 term.c.attr.mode &= ~ATTR_GFX;
1994 return;
1995 case '\032': /* SUB */
1996 case '\030': /* CAN */
1997 csireset();
1998 return;
1999 case '\005': /* ENQ (IGNORED) */
2000 case '\000': /* NUL (IGNORED) */
2001 case '\021': /* XON (IGNORED) */
2002 case '\023': /* XOFF (IGNORED) */
2003 case 0177: /* DEL (IGNORED) */
2004 return;
2005 }
2006 } else if(term.esc & ESC_START) {
2007 if(term.esc & ESC_CSI) {
2008 csiescseq.buf[csiescseq.len++] = ascii;
2009 if(BETWEEN(ascii, 0x40, 0x7E)
2010 || csiescseq.len >= ESC_BUF_SIZ) {
2011 term.esc = 0;
2012 csiparse(), csihandle();
2013 }
2014 } else if(term.esc & ESC_STR_END) {
2015 term.esc = 0;
2016 if(ascii == '\\')
2017 strhandle();
2018 } else if(term.esc & ESC_ALTCHARSET) {
2019 switch(ascii) {
2020 case '0': /* Line drawing set */
2021 term.c.attr.mode |= ATTR_GFX;
2022 break;
2023 case 'B': /* USASCII */
2024 term.c.attr.mode &= ~ATTR_GFX;
2025 break;
2026 case 'A': /* UK (IGNORED) */
2027 case '<': /* multinational charset (IGNORED) */
2028 case '5': /* Finnish (IGNORED) */
2029 case 'C': /* Finnish (IGNORED) */
2030 case 'K': /* German (IGNORED) */
2031 break;
2032 default:
2033 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2034 }
2035 term.esc = 0;
2036 } else if(term.esc & ESC_TEST) {
2037 if(ascii == '8') { /* DEC screen alignment test. */
2038 char E[UTF_SIZ] = "E";
2039 int x, y;
2040
2041 for(x = 0; x < term.col; ++x) {
2042 for(y = 0; y < term.row; ++y)
2043 tsetchar(E, &term.c.attr, x, y);
2044 }
2045 }
2046 term.esc = 0;
2047 } else {
2048 switch(ascii) {
2049 case '[':
2050 term.esc |= ESC_CSI;
2051 break;
2052 case '#':
2053 term.esc |= ESC_TEST;
2054 break;
2055 case 'P': /* DCS -- Device Control String */
2056 case '_': /* APC -- Application Program Command */
2057 case '^': /* PM -- Privacy Message */
2058 case ']': /* OSC -- Operating System Command */
2059 case 'k': /* old title set compatibility */
2060 strreset();
2061 strescseq.type = ascii;
2062 term.esc |= ESC_STR;
2063 break;
2064 case '(': /* set primary charset G0 */
2065 term.esc |= ESC_ALTCHARSET;
2066 break;
2067 case ')': /* set secondary charset G1 (IGNORED) */
2068 case '*': /* set tertiary charset G2 (IGNORED) */
2069 case '+': /* set quaternary charset G3 (IGNORED) */
2070 term.esc = 0;
2071 break;
2072 case 'D': /* IND -- Linefeed */
2073 if(term.c.y == term.bot) {
2074 tscrollup(term.top, 1);
2075 } else {
2076 tmoveto(term.c.x, term.c.y+1);
2077 }
2078 term.esc = 0;
2079 break;
2080 case 'E': /* NEL -- Next line */
2081 tnewline(1); /* always go to first col */
2082 term.esc = 0;
2083 break;
2084 case 'H': /* HTS -- Horizontal tab stop */
2085 term.tabs[term.c.x] = 1;
2086 term.esc = 0;
2087 break;
2088 case 'M': /* RI -- Reverse index */
2089 if(term.c.y == term.top) {
2090 tscrolldown(term.top, 1);
2091 } else {
2092 tmoveto(term.c.x, term.c.y-1);
2093 }
2094 term.esc = 0;
2095 break;
2096 case 'Z': /* DECID -- Identify Terminal */
2097 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2098 term.esc = 0;
2099 break;
2100 case 'c': /* RIS -- Reset to inital state */
2101 treset();
2102 term.esc = 0;
2103 xresettitle();
2104 break;
2105 case '=': /* DECPAM -- Application keypad */
2106 term.mode |= MODE_APPKEYPAD;
2107 term.esc = 0;
2108 break;
2109 case '>': /* DECPNM -- Normal keypad */
2110 term.mode &= ~MODE_APPKEYPAD;
2111 term.esc = 0;
2112 break;
2113 case '7': /* DECSC -- Save Cursor */
2114 tcursor(CURSOR_SAVE);
2115 term.esc = 0;
2116 break;
2117 case '8': /* DECRC -- Restore Cursor */
2118 tcursor(CURSOR_LOAD);
2119 term.esc = 0;
2120 break;
2121 case '\\': /* ST -- Stop */
2122 term.esc = 0;
2123 break;
2124 default:
2125 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2126 (uchar) ascii, isprint(ascii)? ascii:'.');
2127 term.esc = 0;
2128 }
2129 }
2130 /*
2131 * All characters which form part of a sequence are not
2132 * printed
2133 */
2134 return;
2135 }
2136 /*
2137 * Display control codes only if we are in graphic mode
2138 */
2139 if(control && !(term.c.attr.mode & ATTR_GFX))
2140 return;
2141 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2142 sel.bx = -1;
2143 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2144 tnewline(1); /* always go to first col */
2145
2146 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2147 memmove(&term.line[term.c.y][term.c.x+1],
2148 &term.line[term.c.y][term.c.x],
2149 (term.col - term.c.x - 1) * sizeof(Glyph));
2150 }
2151
2152 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2153 if(term.c.x+1 < term.col) {
2154 tmoveto(term.c.x+1, term.c.y);
2155 } else {
2156 term.c.state |= CURSOR_WRAPNEXT;
2157 }
2158 }
2159
2160 int
2161 tresize(int col, int row) {
2162 int i, x;
2163 int minrow = MIN(row, term.row);
2164 int mincol = MIN(col, term.col);
2165 int slide = term.c.y - row + 1;
2166 bool *bp;
2167
2168 if(col < 1 || row < 1)
2169 return 0;
2170
2171 /* free unneeded rows */
2172 i = 0;
2173 if(slide > 0) {
2174 /* slide screen to keep cursor where we expect it -
2175 * tscrollup would work here, but we can optimize to
2176 * memmove because we're freeing the earlier lines */
2177 for(/* i = 0 */; i < slide; i++) {
2178 free(term.line[i]);
2179 free(term.alt[i]);
2180 }
2181 memmove(term.line, term.line + slide, row * sizeof(Line));
2182 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2183 }
2184 for(i += row; i < term.row; i++) {
2185 free(term.line[i]);
2186 free(term.alt[i]);
2187 }
2188
2189 /* resize to new height */
2190 term.line = xrealloc(term.line, row * sizeof(Line));
2191 term.alt = xrealloc(term.alt, row * sizeof(Line));
2192 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2193 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2194
2195 /* resize each row to new width, zero-pad if needed */
2196 for(i = 0; i < minrow; i++) {
2197 term.dirty[i] = 1;
2198 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2199 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2200 for(x = mincol; x < col; x++) {
2201 term.line[i][x].state = 0;
2202 term.alt[i][x].state = 0;
2203 }
2204 }
2205
2206 /* allocate any new rows */
2207 for(/* i == minrow */; i < row; i++) {
2208 term.dirty[i] = 1;
2209 term.line[i] = xcalloc(col, sizeof(Glyph));
2210 term.alt [i] = xcalloc(col, sizeof(Glyph));
2211 }
2212 if(col > term.col) {
2213 bp = term.tabs + term.col;
2214
2215 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2216 while(--bp > term.tabs && !*bp)
2217 /* nothing */ ;
2218 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2219 *bp = 1;
2220 }
2221 /* update terminal size */
2222 term.col = col;
2223 term.row = row;
2224 /* reset scrolling region */
2225 tsetscroll(0, row-1);
2226 /* make use of the LIMIT in tmoveto */
2227 tmoveto(term.c.x, term.c.y);
2228
2229 return (slide > 0);
2230 }
2231
2232 void
2233 xresize(int col, int row) {
2234 xw.tw = MAX(1, col * xw.cw);
2235 xw.th = MAX(1, row * xw.ch);
2236
2237 XftDrawChange(xw.draw, xw.buf);
2238 }
2239
2240 void
2241 xloadcols(void) {
2242 int i, r, g, b;
2243 XRenderColor color = { .alpha = 0 };
2244
2245 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2246 for(i = 0; i < LEN(colorname); i++) {
2247 if(!colorname[i])
2248 continue;
2249 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2250 die("Could not allocate color '%s'\n", colorname[i]);
2251 }
2252 }
2253
2254 /* load colors [16-255] ; same colors as xterm */
2255 for(i = 16, r = 0; r < 6; r++) {
2256 for(g = 0; g < 6; g++) {
2257 for(b = 0; b < 6; b++) {
2258 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
2259 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
2260 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
2261 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2262 die("Could not allocate color %d\n", i);
2263 }
2264 i++;
2265 }
2266 }
2267 }
2268
2269 for(r = 0; r < 24; r++, i++) {
2270 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2271 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2272 &dc.col[i])) {
2273 die("Could not allocate color %d\n", i);
2274 }
2275 }
2276 }
2277
2278 void
2279 xtermclear(int col1, int row1, int col2, int row2) {
2280 XftDrawRect(xw.draw,
2281 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2282 borderpx + col1 * xw.cw,
2283 borderpx + row1 * xw.ch,
2284 (col2-col1+1) * xw.cw,
2285 (row2-row1+1) * xw.ch);
2286 }
2287
2288 /*
2289 * Absolute coordinates.
2290 */
2291 void
2292 xclear(int x1, int y1, int x2, int y2) {
2293 XftDrawRect(xw.draw,
2294 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2295 x1, y1, x2-x1, y2-y1);
2296 }
2297
2298 void
2299 xhints(void) {
2300 XClassHint class = {opt_class ? opt_class : termname, termname};
2301 XWMHints wm = {.flags = InputHint, .input = 1};
2302 XSizeHints *sizeh = NULL;
2303
2304 sizeh = XAllocSizeHints();
2305 if(xw.isfixed == False) {
2306 sizeh->flags = PSize | PResizeInc | PBaseSize;
2307 sizeh->height = xw.h;
2308 sizeh->width = xw.w;
2309 sizeh->height_inc = xw.ch;
2310 sizeh->width_inc = xw.cw;
2311 sizeh->base_height = 2 * borderpx;
2312 sizeh->base_width = 2 * borderpx;
2313 } else {
2314 sizeh->flags = PMaxSize | PMinSize;
2315 sizeh->min_width = sizeh->max_width = xw.fw;
2316 sizeh->min_height = sizeh->max_height = xw.fh;
2317 }
2318
2319 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2320 XFree(sizeh);
2321 }
2322
2323 int
2324 xloadfont(Font *f, FcPattern *pattern) {
2325 FcPattern *match;
2326 FcResult result;
2327
2328 match = FcFontMatch(NULL, pattern, &result);
2329 if(!match)
2330 return 1;
2331
2332 if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
2333 FcPatternDestroy(match);
2334 return 1;
2335 }
2336
2337 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2338 FcPatternDestroy(match);
2339 return 1;
2340 }
2341
2342 f->pattern = FcPatternDuplicate(pattern);
2343
2344 f->ascent = f->match->ascent;
2345 f->descent = f->match->descent;
2346 f->lbearing = 0;
2347 f->rbearing = f->match->max_advance_width;
2348
2349 f->height = f->match->height;
2350 f->width = f->lbearing + f->rbearing;
2351
2352 return 0;
2353 }
2354
2355 void
2356 xloadfonts(char *fontstr, int fontsize) {
2357 FcPattern *pattern;
2358 FcResult result;
2359 double fontval;
2360
2361 if(fontstr[0] == '-') {
2362 pattern = XftXlfdParse(fontstr, False, False);
2363 } else {
2364 pattern = FcNameParse((FcChar8 *)fontstr);
2365 }
2366
2367 if(!pattern)
2368 die("st: can't open font %s\n", fontstr);
2369
2370 if(fontsize > 0) {
2371 FcPatternDel(pattern, FC_PIXEL_SIZE);
2372 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2373 usedfontsize = fontsize;
2374 } else {
2375 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2376 if(result == FcResultMatch) {
2377 usedfontsize = (int)fontval;
2378 } else {
2379 /*
2380 * Default font size is 12, if none given. This is to
2381 * have a known usedfontsize value.
2382 */
2383 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2384 usedfontsize = 12;
2385 }
2386 }
2387
2388 FcConfigSubstitute(0, pattern, FcMatchPattern);
2389 FcDefaultSubstitute(pattern);
2390
2391 if(xloadfont(&dc.font, pattern))
2392 die("st: can't open font %s\n", fontstr);
2393
2394 /* Setting character width and height. */
2395 xw.cw = dc.font.width;
2396 xw.ch = dc.font.height;
2397
2398 FcPatternDel(pattern, FC_WEIGHT);
2399 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2400 if(xloadfont(&dc.bfont, pattern))
2401 die("st: can't open font %s\n", fontstr);
2402
2403 FcPatternDel(pattern, FC_SLANT);
2404 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2405 if(xloadfont(&dc.ibfont, pattern))
2406 die("st: can't open font %s\n", fontstr);
2407
2408 FcPatternDel(pattern, FC_WEIGHT);
2409 if(xloadfont(&dc.ifont, pattern))
2410 die("st: can't open font %s\n", fontstr);
2411
2412 FcPatternDestroy(pattern);
2413 }
2414
2415 void
2416 xunloadfonts(void)
2417 {
2418 int i, ip;
2419
2420 /*
2421 * Free the loaded fonts in the font cache. This is done backwards
2422 * from the frccur.
2423 */
2424 for (i = 0, ip = frccur; i < frclen; i++, ip--) {
2425 if (ip < 0)
2426 ip = LEN(frc) - 1;
2427 XftFontClose(xw.dpy, frc[ip].font);
2428 }
2429 frccur = -1;
2430 frclen = 0;
2431
2432 XftFontClose(xw.dpy, dc.font.match);
2433 FcPatternDestroy(dc.font.pattern);
2434 FcFontSetDestroy(dc.font.set);
2435 XftFontClose(xw.dpy, dc.bfont.match);
2436 FcPatternDestroy(dc.bfont.pattern);
2437 FcFontSetDestroy(dc.bfont.set);
2438 XftFontClose(xw.dpy, dc.ifont.match);
2439 FcPatternDestroy(dc.ifont.pattern);
2440 FcFontSetDestroy(dc.ifont.set);
2441 XftFontClose(xw.dpy, dc.ibfont.match);
2442 FcPatternDestroy(dc.ibfont.pattern);
2443 FcFontSetDestroy(dc.ibfont.set);
2444 }
2445
2446 void
2447 xzoom(const Arg *arg)
2448 {
2449 xunloadfonts();
2450 xloadfonts(usedfont, usedfontsize + arg->i);
2451 cresize(0, 0);
2452 draw();
2453 }
2454
2455 void
2456 xinit(void) {
2457 XSetWindowAttributes attrs;
2458 Cursor cursor;
2459 Window parent;
2460 int sw, sh, major, minor;
2461
2462 if(!(xw.dpy = XOpenDisplay(NULL)))
2463 die("Can't open display\n");
2464 xw.scr = XDefaultScreen(xw.dpy);
2465 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2466
2467 /* font */
2468 if (!FcInit())
2469 die("Could not init fontconfig.\n");
2470
2471 usedfont = (opt_font == NULL)? font : opt_font;
2472 xloadfonts(usedfont, 0);
2473
2474 /* colors */
2475 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2476 xloadcols();
2477
2478 /* adjust fixed window geometry */
2479 if(xw.isfixed) {
2480 sw = DisplayWidth(xw.dpy, xw.scr);
2481 sh = DisplayHeight(xw.dpy, xw.scr);
2482 if(xw.fx < 0)
2483 xw.fx = sw + xw.fx - xw.fw - 1;
2484 if(xw.fy < 0)
2485 xw.fy = sh + xw.fy - xw.fh - 1;
2486
2487 xw.h = xw.fh;
2488 xw.w = xw.fw;
2489 } else {
2490 /* window - default size */
2491 xw.h = 2 * borderpx + term.row * xw.ch;
2492 xw.w = 2 * borderpx + term.col * xw.cw;
2493 xw.fx = 0;
2494 xw.fy = 0;
2495 }
2496
2497 attrs.background_pixel = dc.col[defaultbg].pixel;
2498 attrs.border_pixel = dc.col[defaultbg].pixel;
2499 attrs.bit_gravity = NorthWestGravity;
2500 attrs.event_mask = FocusChangeMask | KeyPressMask
2501 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2502 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2503 attrs.colormap = xw.cmap;
2504
2505 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2506 XRootWindow(xw.dpy, xw.scr);
2507 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2508 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2509 xw.vis,
2510 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2511 | CWColormap,
2512 &attrs);
2513
2514 /* double buffering */
2515 if(XdbeQueryExtension(xw.dpy, &major, &minor)) {
2516 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win,
2517 XdbeBackground);
2518 usedbe = True;
2519 } else {
2520 xw.buf = xw.win;
2521 }
2522
2523 /* Xft rendering context */
2524 xw.draw = XftDrawCreate(xw.dpy, xw.win, xw.vis, xw.cmap);
2525
2526 /* input methods */
2527 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2528 XSetLocaleModifiers("@im=local");
2529 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2530 XSetLocaleModifiers("@im=");
2531 if((xw.xim = XOpenIM(xw.dpy,
2532 NULL, NULL, NULL)) == NULL) {
2533 die("XOpenIM failed. Could not open input"
2534 " device.\n");
2535 }
2536 }
2537 }
2538 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2539 | XIMStatusNothing, XNClientWindow, xw.win,
2540 XNFocusWindow, xw.win, NULL);
2541 if(xw.xic == NULL)
2542 die("XCreateIC failed. Could not obtain input method.\n");
2543
2544 /* white cursor, black outline */
2545 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2546 XDefineCursor(xw.dpy, xw.win, cursor);
2547 XRecolorCursor(xw.dpy, cursor,
2548 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2549 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2550
2551 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2552 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2553 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2554
2555 xresettitle();
2556 XMapWindow(xw.dpy, xw.win);
2557 xhints();
2558 XSync(xw.dpy, 0);
2559 }
2560
2561 void
2562 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2563 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2564 width = charlen * xw.cw, xp, i;
2565 int frp, frcflags;
2566 int u8fl, u8fblen, u8cblen, doesexist;
2567 char *u8c, *u8fs;
2568 long u8char;
2569 Font *font = &dc.font;
2570 FcResult fcres;
2571 FcPattern *fcpattern, *fontpattern;
2572 FcFontSet *fcsets[] = { NULL };
2573 FcCharSet *fccharset;
2574 Colour *fg = &dc.col[base.fg], *bg = &dc.col[base.bg],
2575 *temp, revfg, revbg;
2576 XRenderColor colfg, colbg;
2577
2578 frcflags = FRC_NORMAL;
2579
2580 if(base.mode & ATTR_BOLD) {
2581 if(BETWEEN(base.fg, 0, 7)) {
2582 /* basic system colors */
2583 fg = &dc.col[base.fg + 8];
2584 } else if(BETWEEN(base.fg, 16, 195)) {
2585 /* 256 colors */
2586 fg = &dc.col[base.fg + 36];
2587 } else if(BETWEEN(base.fg, 232, 251)) {
2588 /* greyscale */
2589 fg = &dc.col[base.fg + 4];
2590 }
2591 /*
2592 * Those ranges will not be brightened:
2593 * 8 - 15 – bright system colors
2594 * 196 - 231 – highest 256 color cube
2595 * 252 - 255 – brightest colors in greyscale
2596 */
2597 font = &dc.bfont;
2598 frcflags = FRC_BOLD;
2599 }
2600
2601 if(base.mode & ATTR_ITALIC) {
2602 font = &dc.ifont;
2603 frcflags = FRC_ITALIC;
2604 }
2605 if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2606 font = &dc.ibfont;
2607 frcflags = FRC_ITALICBOLD;
2608 }
2609
2610 if(IS_SET(MODE_REVERSE)) {
2611 if(fg == &dc.col[defaultfg]) {
2612 fg = &dc.col[defaultbg];
2613 } else {
2614 colfg.red = ~fg->color.red;
2615 colfg.green = ~fg->color.green;
2616 colfg.blue = ~fg->color.blue;
2617 colfg.alpha = fg->color.alpha;
2618 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2619 fg = &revfg;
2620 }
2621
2622 if(bg == &dc.col[defaultbg]) {
2623 bg = &dc.col[defaultfg];
2624 } else {
2625 colbg.red = ~bg->color.red;
2626 colbg.green = ~bg->color.green;
2627 colbg.blue = ~bg->color.blue;
2628 colbg.alpha = bg->color.alpha;
2629 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2630 bg = &revbg;
2631 }
2632 }
2633
2634 if(base.mode & ATTR_REVERSE) {
2635 temp = fg;
2636 fg = bg;
2637 bg = temp;
2638 }
2639
2640 /* Intelligent cleaning up of the borders. */
2641 if(x == 0) {
2642 xclear(0, (y == 0)? 0 : winy, borderpx,
2643 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2644 }
2645 if(x + charlen >= term.col) {
2646 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2647 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2648 }
2649 if(y == 0)
2650 xclear(winx, 0, winx + width, borderpx);
2651 if(y == term.row-1)
2652 xclear(winx, winy + xw.ch, winx + width, xw.h);
2653
2654 /* Clean up the region we want to draw to. */
2655 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2656
2657 fcsets[0] = font->set;
2658 for (xp = winx; bytelen > 0;) {
2659 /*
2660 * Search for the range in the to be printed string of glyphs
2661 * that are in the main font. Then print that range. If
2662 * some glyph is found that is not in the font, do the
2663 * fallback dance.
2664 */
2665 u8fs = s;
2666 u8fblen = 0;
2667 u8fl = 0;
2668 for (;;) {
2669 u8c = s;
2670 u8cblen = utf8decode(s, &u8char);
2671 s += u8cblen;
2672 bytelen -= u8cblen;
2673
2674 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
2675 if (!doesexist || bytelen <= 0) {
2676 if (bytelen <= 0) {
2677 if (doesexist) {
2678 u8fl++;
2679 u8fblen += u8cblen;
2680 }
2681 }
2682
2683 if (u8fl > 0) {
2684 XftDrawStringUtf8(xw.draw, fg,
2685 font->match, xp,
2686 winy + font->ascent,
2687 (FcChar8 *)u8fs,
2688 u8fblen);
2689 xp += font->width * u8fl;
2690 }
2691 break;
2692 }
2693
2694 u8fl++;
2695 u8fblen += u8cblen;
2696 }
2697 if (doesexist)
2698 break;
2699
2700 frp = frccur;
2701 /* Search the font cache. */
2702 for (i = 0; i < frclen; i++, frp--) {
2703 if (frp <= 0)
2704 frp = LEN(frc) - 1;
2705
2706 if (frc[frp].c == u8char
2707 && frc[frp].flags == frcflags) {
2708 break;
2709 }
2710 }
2711
2712 /* Nothing was found. */
2713 if (i >= frclen) {
2714 /*
2715 * Nothing was found in the cache. Now use
2716 * some dozen of Fontconfig calls to get the
2717 * font for one single character.
2718 */
2719 fcpattern = FcPatternDuplicate(font->pattern);
2720 fccharset = FcCharSetCreate();
2721
2722 FcCharSetAddChar(fccharset, u8char);
2723 FcPatternAddCharSet(fcpattern, FC_CHARSET,
2724 fccharset);
2725 FcPatternAddBool(fcpattern, FC_SCALABLE,
2726 FcTrue);
2727
2728 FcConfigSubstitute(0, fcpattern,
2729 FcMatchPattern);
2730 FcDefaultSubstitute(fcpattern);
2731
2732 fontpattern = FcFontSetMatch(0, fcsets,
2733 FcTrue, fcpattern, &fcres);
2734
2735 /*
2736 * Overwrite or create the new cache entry
2737 * entry.
2738 */
2739 frccur++;
2740 frclen++;
2741 if (frccur >= LEN(frc))
2742 frccur = 0;
2743 if (frclen > LEN(frc)) {
2744 frclen = LEN(frc);
2745 XftFontClose(xw.dpy, frc[frccur].font);
2746 }
2747
2748 frc[frccur].font = XftFontOpenPattern(xw.dpy,
2749 fontpattern);
2750 frc[frccur].c = u8char;
2751 frc[frccur].flags = frcflags;
2752
2753 FcPatternDestroy(fcpattern);
2754 FcCharSetDestroy(fccharset);
2755
2756 frp = frccur;
2757 }
2758
2759 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
2760 xp, winy + frc[frp].font->ascent,
2761 (FcChar8 *)u8c, u8cblen);
2762
2763 xp += font->width;
2764 }
2765
2766 /*
2767 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
2768 winy + font->ascent, (FcChar8 *)s, bytelen);
2769 */
2770
2771 if(base.mode & ATTR_UNDERLINE) {
2772 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
2773 width, 1);
2774 }
2775 }
2776
2777 void
2778 xdrawcursor(void) {
2779 static int oldx = 0, oldy = 0;
2780 int sl;
2781 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs, 0};
2782
2783 LIMIT(oldx, 0, term.col-1);
2784 LIMIT(oldy, 0, term.row-1);
2785
2786 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2787 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2788
2789 /* remove the old cursor */
2790 if(term.line[oldy][oldx].state & GLYPH_SET) {
2791 sl = utf8size(term.line[oldy][oldx].c);
2792 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2793 oldy, 1, sl);
2794 } else {
2795 xtermclear(oldx, oldy, oldx, oldy);
2796 }
2797
2798 /* draw the new one */
2799 if(!(IS_SET(MODE_HIDE))) {
2800 if(!(xw.state & WIN_FOCUSED))
2801 g.bg = defaultucs;
2802
2803 if(IS_SET(MODE_REVERSE))
2804 g.mode |= ATTR_REVERSE, g.fg = defaultcs, g.bg = defaultfg;
2805
2806 sl = utf8size(g.c);
2807 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2808 oldx = term.c.x, oldy = term.c.y;
2809 }
2810 }
2811
2812 void
2813 xresettitle(void) {
2814 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
2815 }
2816
2817 void
2818 redraw(void) {
2819 struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
2820
2821 tfulldirt();
2822 draw();
2823 XSync(xw.dpy, False); /* necessary for a good tput flash */
2824 nanosleep(&tv, NULL);
2825 }
2826
2827 void
2828 draw(void) {
2829 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2830
2831 drawregion(0, 0, term.col, term.row);
2832 if(usedbe)
2833 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2834 }
2835
2836 void
2837 drawregion(int x1, int y1, int x2, int y2) {
2838 int ic, ib, x, y, ox, sl;
2839 Glyph base, new;
2840 char buf[DRAW_BUF_SIZ];
2841 bool ena_sel = sel.bx != -1;
2842
2843 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
2844 ena_sel = 0;
2845
2846 if(!(xw.state & WIN_VISIBLE))
2847 return;
2848
2849 for(y = y1; y < y2; y++) {
2850 if(!term.dirty[y])
2851 continue;
2852
2853 xtermclear(0, y, term.col, y);
2854 term.dirty[y] = 0;
2855 base = term.line[y][0];
2856 ic = ib = ox = 0;
2857 for(x = x1; x < x2; x++) {
2858 new = term.line[y][x];
2859 if(ena_sel && *(new.c) && selected(x, y))
2860 new.mode ^= ATTR_REVERSE;
2861 if(ib > 0 && (!(new.state & GLYPH_SET)
2862 || ATTRCMP(base, new)
2863 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2864 xdraws(buf, base, ox, y, ic, ib);
2865 ic = ib = 0;
2866 }
2867 if(new.state & GLYPH_SET) {
2868 if(ib == 0) {
2869 ox = x;
2870 base = new;
2871 }
2872 sl = utf8size(new.c);
2873 memcpy(buf+ib, new.c, sl);
2874 ib += sl;
2875 ++ic;
2876 }
2877 }
2878 if(ib > 0)
2879 xdraws(buf, base, ox, y, ic, ib);
2880 }
2881 xdrawcursor();
2882 }
2883
2884 void
2885 expose(XEvent *ev) {
2886 XExposeEvent *e = &ev->xexpose;
2887
2888 if(xw.state & WIN_REDRAW) {
2889 if(!e->count)
2890 xw.state &= ~WIN_REDRAW;
2891 }
2892 }
2893
2894 void
2895 visibility(XEvent *ev) {
2896 XVisibilityEvent *e = &ev->xvisibility;
2897
2898 if(e->state == VisibilityFullyObscured) {
2899 xw.state &= ~WIN_VISIBLE;
2900 } else if(!(xw.state & WIN_VISIBLE)) {
2901 /* need a full redraw for next Expose, not just a buf copy */
2902 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2903 }
2904 }
2905
2906 void
2907 unmap(XEvent *ev) {
2908 xw.state &= ~WIN_VISIBLE;
2909 }
2910
2911 void
2912 xseturgency(int add) {
2913 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2914
2915 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2916 XSetWMHints(xw.dpy, xw.win, h);
2917 XFree(h);
2918 }
2919
2920 void
2921 focus(XEvent *ev) {
2922 if(ev->type == FocusIn) {
2923 XSetICFocus(xw.xic);
2924 xw.state |= WIN_FOCUSED;
2925 xseturgency(0);
2926 } else {
2927 XUnsetICFocus(xw.xic);
2928 xw.state &= ~WIN_FOCUSED;
2929 }
2930 }
2931
2932 inline bool
2933 match(uint mask, uint state) {
2934 if(mask == XK_NO_MOD && state)
2935 return false;
2936 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
2937 return false;
2938 if((state & mask) != state)
2939 return false;
2940 return true;
2941 }
2942
2943 void
2944 numlock(const Arg *dummy) {
2945 term.numlock ^= 1;
2946 }
2947
2948 char*
2949 kmap(KeySym k, uint state) {
2950 uint mask;
2951 Key *kp;
2952 int i;
2953
2954 /* Check for mapped keys out of X11 function keys. */
2955 for(i = 0; i < LEN(mappedkeys); i++) {
2956 if(mappedkeys[i] == k)
2957 break;
2958 }
2959 if(i == LEN(mappedkeys)) {
2960 if((k & 0xFFFF) < 0xFD00)
2961 return NULL;
2962 }
2963
2964 for(kp = key; kp < key + LEN(key); kp++) {
2965 mask = kp->mask;
2966
2967 if(kp->k != k)
2968 continue;
2969
2970 if(!match(mask, state))
2971 continue;
2972
2973 if(kp->appkey > 0) {
2974 if(!IS_SET(MODE_APPKEYPAD))
2975 continue;
2976 if(term.numlock && kp->appkey == 2)
2977 continue;
2978 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
2979 continue;
2980 }
2981
2982 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
2983 (kp->appcursor > 0
2984 && !IS_SET(MODE_APPCURSOR))) {
2985 continue;
2986 }
2987
2988 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
2989 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
2990 continue;
2991 }
2992
2993 return kp->s;
2994 }
2995
2996 return NULL;
2997 }
2998
2999 void
3000 kpress(XEvent *ev) {
3001 XKeyEvent *e = &ev->xkey;
3002 KeySym ksym;
3003 char xstr[31], buf[32], *customkey, *cp = buf;
3004 int len;
3005 Status status;
3006 Shortcut *bp;
3007
3008 if (IS_SET(MODE_KBDLOCK))
3009 return;
3010
3011 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3012 e->state &= ~Mod2Mask;
3013 /* 1. shortcuts */
3014 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3015 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3016 bp->func(&(bp->arg));
3017 return;
3018 }
3019 }
3020
3021 /* 2. custom keys from config.h */
3022 if((customkey = kmap(ksym, e->state))) {
3023 len = strlen(customkey);
3024 memcpy(buf, customkey, len);
3025 /* 2. hardcoded (overrides X lookup) */
3026 } else {
3027 if(len == 0)
3028 return;
3029
3030 if (len == 1 && e->state & Mod1Mask)
3031 *cp++ = '\033';
3032
3033 memcpy(cp, xstr, len);
3034 len = cp - buf + len;
3035 }
3036
3037 ttywrite(buf, len);
3038 if(IS_SET(MODE_ECHO))
3039 techo(buf, len);
3040 }
3041
3042
3043 void
3044 cmessage(XEvent *e) {
3045 /* See xembed specs
3046 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
3047 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3048 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3049 xw.state |= WIN_FOCUSED;
3050 xseturgency(0);
3051 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3052 xw.state &= ~WIN_FOCUSED;
3053 }
3054 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3055 /* Send SIGHUP to shell */
3056 kill(pid, SIGHUP);
3057 exit(EXIT_SUCCESS);
3058 }
3059 }
3060
3061 void
3062 cresize(int width, int height)
3063 {
3064 int col, row;
3065
3066 if(width != 0)
3067 xw.w = width;
3068 if(height != 0)
3069 xw.h = height;
3070
3071 col = (xw.w - 2 * borderpx) / xw.cw;
3072 row = (xw.h - 2 * borderpx) / xw.ch;
3073
3074 tresize(col, row);
3075 xresize(col, row);
3076 ttyresize();
3077 }
3078
3079 void
3080 resize(XEvent *e) {
3081 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3082 return;
3083
3084 cresize(e->xconfigure.width, e->xconfigure.height);
3085 }
3086
3087 void
3088 run(void) {
3089 XEvent ev;
3090 fd_set rfd;
3091 int xfd = XConnectionNumber(xw.dpy), i;
3092 struct timeval drawtimeout, *tv = NULL;
3093
3094 for(i = 0;; i++) {
3095 FD_ZERO(&rfd);
3096 FD_SET(cmdfd, &rfd);
3097 FD_SET(xfd, &rfd);
3098 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3099 if(errno == EINTR)
3100 continue;
3101 die("select failed: %s\n", SERRNO);
3102 }
3103
3104 /*
3105 * Stop after a certain number of reads so the user does not
3106 * feel like the system is stuttering.
3107 */
3108 if(i < 1000 && FD_ISSET(cmdfd, &rfd)) {
3109 ttyread();
3110
3111 /*
3112 * Just wait a bit so it isn't disturbing the
3113 * user and the system is able to write something.
3114 */
3115 drawtimeout.tv_sec = 0;
3116 drawtimeout.tv_usec = 5;
3117 tv = &drawtimeout;
3118 continue;
3119 }
3120 i = 0;
3121 tv = NULL;
3122
3123 while(XPending(xw.dpy)) {
3124 XNextEvent(xw.dpy, &ev);
3125 if(XFilterEvent(&ev, None))
3126 continue;
3127 if(handler[ev.type])
3128 (handler[ev.type])(&ev);
3129 }
3130
3131 draw();
3132 XFlush(xw.dpy);
3133 }
3134 }
3135
3136 int
3137 main(int argc, char *argv[]) {
3138 int i, bitm, xr, yr;
3139 uint wr, hr;
3140
3141 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3142 xw.isfixed = False;
3143
3144 for(i = 1; i < argc; i++) {
3145 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
3146 case 'c':
3147 if(++i < argc)
3148 opt_class = argv[i];
3149 break;
3150 case 'e':
3151 /* eat all remaining arguments */
3152 if(++i < argc)
3153 opt_cmd = &argv[i];
3154 goto run;
3155 case 'f':
3156 if(++i < argc)
3157 opt_font = argv[i];
3158 break;
3159 case 'g':
3160 if(++i >= argc)
3161 break;
3162
3163 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
3164 if(bitm & XValue)
3165 xw.fx = xr;
3166 if(bitm & YValue)
3167 xw.fy = yr;
3168 if(bitm & WidthValue)
3169 xw.fw = (int)wr;
3170 if(bitm & HeightValue)
3171 xw.fh = (int)hr;
3172 if(bitm & XNegative && xw.fx == 0)
3173 xw.fx = -1;
3174 if(bitm & XNegative && xw.fy == 0)
3175 xw.fy = -1;
3176
3177 if(xw.fh != 0 && xw.fw != 0)
3178 xw.isfixed = True;
3179 break;
3180 case 'o':
3181 if(++i < argc)
3182 opt_io = argv[i];
3183 break;
3184 case 't':
3185 if(++i < argc)
3186 opt_title = argv[i];
3187 break;
3188 case 'v':
3189 default:
3190 die(USAGE);
3191 case 'w':
3192 if(++i < argc)
3193 opt_embed = argv[i];
3194 break;
3195 }
3196 }
3197
3198 run:
3199 setlocale(LC_CTYPE, "");
3200 XSetLocaleModifiers("");
3201 tnew(80, 24);
3202 xinit();
3203 ttynew();
3204 selinit();
3205 run();
3206
3207 return 0;
3208 }
3209