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Fixing the menus in mc.
[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 MODE_MOUSESGR = 4096,
122 };
123
124 enum escape_state {
125 ESC_START = 1,
126 ESC_CSI = 2,
127 ESC_STR = 4, /* DSC, OSC, PM, APC */
128 ESC_ALTCHARSET = 8,
129 ESC_STR_END = 16, /* a final string was encountered */
130 ESC_TEST = 32, /* Enter in test mode */
131 };
132
133 enum window_state {
134 WIN_VISIBLE = 1,
135 WIN_REDRAW = 2,
136 WIN_FOCUSED = 4
137 };
138
139 /* bit macro */
140 #undef B0
141 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
142
143 typedef unsigned char uchar;
144 typedef unsigned int uint;
145 typedef unsigned long ulong;
146 typedef unsigned short ushort;
147
148 typedef struct {
149 char c[UTF_SIZ]; /* character code */
150 uchar mode; /* attribute flags */
151 ushort fg; /* foreground */
152 ushort bg; /* background */
153 uchar state; /* state flags */
154 } Glyph;
155
156 typedef Glyph *Line;
157
158 typedef struct {
159 Glyph attr; /* current char attributes */
160 int x;
161 int y;
162 char state;
163 } TCursor;
164
165 /* CSI Escape sequence structs */
166 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
167 typedef struct {
168 char buf[ESC_BUF_SIZ]; /* raw string */
169 int len; /* raw string length */
170 char priv;
171 int arg[ESC_ARG_SIZ];
172 int narg; /* nb of args */
173 char mode;
174 } CSIEscape;
175
176 /* STR Escape sequence structs */
177 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
178 typedef struct {
179 char type; /* ESC type ... */
180 char buf[STR_BUF_SIZ]; /* raw string */
181 int len; /* raw string length */
182 char *args[STR_ARG_SIZ];
183 int narg; /* nb of args */
184 } STREscape;
185
186 /* Internal representation of the screen */
187 typedef struct {
188 int row; /* nb row */
189 int col; /* nb col */
190 Line *line; /* screen */
191 Line *alt; /* alternate screen */
192 bool *dirty; /* dirtyness of lines */
193 TCursor c; /* cursor */
194 int top; /* top scroll limit */
195 int bot; /* bottom scroll limit */
196 int mode; /* terminal mode flags */
197 int esc; /* escape state flags */
198 bool numlock; /* lock numbers in keyboard */
199 bool *tabs;
200 } Term;
201
202 /* Purely graphic info */
203 typedef struct {
204 Display *dpy;
205 Colourmap cmap;
206 Window win;
207 Drawable buf;
208 Atom xembed, wmdeletewin;
209 XIM xim;
210 XIC xic;
211 Draw draw;
212 Visual *vis;
213 int scr;
214 bool isfixed; /* is fixed geometry? */
215 int fx, fy, fw, fh; /* fixed geometry */
216 int tw, th; /* tty width and height */
217 int w, h; /* window width and 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 GC gc;
288 } DC;
289
290 static void die(const char *, ...);
291 static void draw(void);
292 static void redraw(int);
293 static void drawregion(int, int, int, int);
294 static void execsh(void);
295 static void sigchld(int);
296 static void run(void);
297
298 static void csidump(void);
299 static void csihandle(void);
300 static void csiparse(void);
301 static void csireset(void);
302 static void strdump(void);
303 static void strhandle(void);
304 static void strparse(void);
305 static void strreset(void);
306
307 static void tclearregion(int, int, int, int, int);
308 static void tcursor(int);
309 static void tdeletechar(int);
310 static void tdeleteline(int);
311 static void tinsertblank(int);
312 static void tinsertblankline(int);
313 static void tmoveto(int, int);
314 static void tmoveato(int x, int y);
315 static void tnew(int, int);
316 static void tnewline(int);
317 static void tputtab(bool);
318 static void tputc(char *, int);
319 static void treset(void);
320 static int tresize(int, int);
321 static void tscrollup(int, int);
322 static void tscrolldown(int, int);
323 static void tsetattr(int*, int);
324 static void tsetchar(char *, Glyph *, int, int);
325 static void tsetscroll(int, int);
326 static void tswapscreen(void);
327 static void tsetdirt(int, int);
328 static void tsetmode(bool, bool, int *, int);
329 static void tfulldirt(void);
330 static void techo(char *, int);
331
332 static inline bool match(uint, uint);
333 static void ttynew(void);
334 static void ttyread(void);
335 static void ttyresize(void);
336 static void ttywrite(const char *, size_t);
337
338 static void xdraws(char *, Glyph, int, int, int, int);
339 static void xhints(void);
340 static void xclear(int, int, int, int);
341 static void xdrawcursor(void);
342 static void xinit(void);
343 static void xloadcols(void);
344 static int xloadfont(Font *, FcPattern *);
345 static void xloadfonts(char *, int);
346 static void xresettitle(void);
347 static void xseturgency(int);
348 static void xsetsel(char*);
349 static void xtermclear(int, int, int, int);
350 static void xunloadfonts(void);
351 static void xresize(int, int);
352
353 static void expose(XEvent *);
354 static void visibility(XEvent *);
355 static void unmap(XEvent *);
356 static char *kmap(KeySym, uint);
357 static void kpress(XEvent *);
358 static void cmessage(XEvent *);
359 static void cresize(int, int);
360 static void resize(XEvent *);
361 static void focus(XEvent *);
362 static void brelease(XEvent *);
363 static void bpress(XEvent *);
364 static void bmotion(XEvent *);
365 static void selnotify(XEvent *);
366 static void selclear(XEvent *);
367 static void selrequest(XEvent *);
368
369 static void selinit(void);
370 static inline bool selected(int, int);
371 static void selcopy(void);
372 static void selscroll(int, int);
373
374 static int utf8decode(char *, long *);
375 static int utf8encode(long *, char *);
376 static int utf8size(char *);
377 static int isfullutf8(char *, int);
378
379 static ssize_t xwrite(int, char *, size_t);
380 static void *xmalloc(size_t);
381 static void *xrealloc(void *, size_t);
382 static void *xcalloc(size_t, size_t);
383
384 static void (*handler[LASTEvent])(XEvent *) = {
385 [KeyPress] = kpress,
386 [ClientMessage] = cmessage,
387 [ConfigureNotify] = resize,
388 [VisibilityNotify] = visibility,
389 [UnmapNotify] = unmap,
390 [Expose] = expose,
391 [FocusIn] = focus,
392 [FocusOut] = focus,
393 [MotionNotify] = bmotion,
394 [ButtonPress] = bpress,
395 [ButtonRelease] = brelease,
396 [SelectionClear] = selclear,
397 [SelectionNotify] = selnotify,
398 [SelectionRequest] = selrequest,
399 };
400
401 /* Globals */
402 static DC dc;
403 static XWindow xw;
404 static Term term;
405 static CSIEscape csiescseq;
406 static STREscape strescseq;
407 static int cmdfd;
408 static pid_t pid;
409 static Selection sel;
410 static int iofd = -1;
411 static char **opt_cmd = NULL;
412 static char *opt_io = NULL;
413 static char *opt_title = NULL;
414 static char *opt_embed = NULL;
415 static char *opt_class = NULL;
416 static char *opt_font = NULL;
417
418 bool usedbe = False;
419
420 static char *usedfont = NULL;
421 static int usedfontsize = 0;
422
423 /* Font Ring Cache */
424 enum {
425 FRC_NORMAL,
426 FRC_ITALIC,
427 FRC_BOLD,
428 FRC_ITALICBOLD
429 };
430
431 typedef struct {
432 XftFont *font;
433 long c;
434 int flags;
435 } Fontcache;
436
437 /*
438 * Fontcache is a ring buffer, with frccur as current position and frclen as
439 * the current length of used elements.
440 */
441
442 static Fontcache frc[1024];
443 static int frccur = -1, frclen = 0;
444
445 ssize_t
446 xwrite(int fd, char *s, size_t len) {
447 size_t aux = len;
448
449 while(len > 0) {
450 ssize_t r = write(fd, s, len);
451 if(r < 0)
452 return r;
453 len -= r;
454 s += r;
455 }
456 return aux;
457 }
458
459 void *
460 xmalloc(size_t len) {
461 void *p = malloc(len);
462
463 if(!p)
464 die("Out of memory\n");
465
466 return p;
467 }
468
469 void *
470 xrealloc(void *p, size_t len) {
471 if((p = realloc(p, len)) == NULL)
472 die("Out of memory\n");
473
474 return p;
475 }
476
477 void *
478 xcalloc(size_t nmemb, size_t size) {
479 void *p = calloc(nmemb, size);
480
481 if(!p)
482 die("Out of memory\n");
483
484 return p;
485 }
486
487 int
488 utf8decode(char *s, long *u) {
489 uchar c;
490 int i, n, rtn;
491
492 rtn = 1;
493 c = *s;
494 if(~c & B7) { /* 0xxxxxxx */
495 *u = c;
496 return rtn;
497 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
498 *u = c&(B4|B3|B2|B1|B0);
499 n = 1;
500 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
501 *u = c&(B3|B2|B1|B0);
502 n = 2;
503 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
504 *u = c & (B2|B1|B0);
505 n = 3;
506 } else {
507 goto invalid;
508 }
509
510 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
511 c = *s;
512 if((c & (B7|B6)) != B7) /* 10xxxxxx */
513 goto invalid;
514 *u <<= 6;
515 *u |= c & (B5|B4|B3|B2|B1|B0);
516 }
517
518 if((n == 1 && *u < 0x80) ||
519 (n == 2 && *u < 0x800) ||
520 (n == 3 && *u < 0x10000) ||
521 (*u >= 0xD800 && *u <= 0xDFFF)) {
522 goto invalid;
523 }
524
525 return rtn;
526 invalid:
527 *u = 0xFFFD;
528
529 return rtn;
530 }
531
532 int
533 utf8encode(long *u, char *s) {
534 uchar *sp;
535 ulong uc;
536 int i, n;
537
538 sp = (uchar *)s;
539 uc = *u;
540 if(uc < 0x80) {
541 *sp = uc; /* 0xxxxxxx */
542 return 1;
543 } else if(*u < 0x800) {
544 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
545 n = 1;
546 } else if(uc < 0x10000) {
547 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
548 n = 2;
549 } else if(uc <= 0x10FFFF) {
550 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
551 n = 3;
552 } else {
553 goto invalid;
554 }
555
556 for(i=n,++sp; i>0; --i,++sp)
557 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
558
559 return n+1;
560 invalid:
561 /* U+FFFD */
562 *s++ = '\xEF';
563 *s++ = '\xBF';
564 *s = '\xBD';
565
566 return 3;
567 }
568
569 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
570 UTF-8 otherwise return 0 */
571 int
572 isfullutf8(char *s, int b) {
573 uchar *c1, *c2, *c3;
574
575 c1 = (uchar *)s;
576 c2 = (uchar *)++s;
577 c3 = (uchar *)++s;
578 if(b < 1) {
579 return 0;
580 } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
581 return 0;
582 } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
583 ((b == 1) ||
584 ((b == 2) && (*c2&(B7|B6)) == B7))) {
585 return 0;
586 } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
587 ((b == 1) ||
588 ((b == 2) && (*c2&(B7|B6)) == B7) ||
589 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
590 return 0;
591 } else {
592 return 1;
593 }
594 }
595
596 int
597 utf8size(char *s) {
598 uchar c = *s;
599
600 if(~c&B7) {
601 return 1;
602 } else if((c&(B7|B6|B5)) == (B7|B6)) {
603 return 2;
604 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
605 return 3;
606 } else {
607 return 4;
608 }
609 }
610
611 void
612 selinit(void) {
613 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
614 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
615 sel.mode = 0;
616 sel.bx = -1;
617 sel.clip = NULL;
618 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
619 if(sel.xtarget == None)
620 sel.xtarget = XA_STRING;
621 }
622
623 static int
624 x2col(int x) {
625 x -= borderpx;
626 x /= xw.cw;
627
628 return LIMIT(x, 0, term.col-1);
629 }
630
631 static int
632 y2row(int y) {
633 y -= borderpx;
634 y /= xw.ch;
635
636 return LIMIT(y, 0, term.row-1);
637 }
638
639 static inline bool
640 selected(int x, int y) {
641 int bx, ex;
642
643 if(sel.ey == y && sel.by == y) {
644 bx = MIN(sel.bx, sel.ex);
645 ex = MAX(sel.bx, sel.ex);
646 return BETWEEN(x, bx, ex);
647 }
648
649 return ((sel.b.y < y && y < sel.e.y)
650 || (y == sel.e.y && x <= sel.e.x))
651 || (y == sel.b.y && x >= sel.b.x
652 && (x <= sel.e.x || sel.b.y != sel.e.y));
653 }
654
655 void
656 getbuttoninfo(XEvent *e) {
657 sel.alt = IS_SET(MODE_ALTSCREEN);
658
659 sel.ex = x2col(e->xbutton.x);
660 sel.ey = y2row(e->xbutton.y);
661
662 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
663 sel.b.y = MIN(sel.by, sel.ey);
664 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
665 sel.e.y = MAX(sel.by, sel.ey);
666 }
667
668 void
669 mousereport(XEvent *e) {
670 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
671 button = e->xbutton.button, state = e->xbutton.state,
672 len;
673 char buf[40];
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(!IS_SET(MODE_MOUSESGR)
683 && (e->xbutton.type == ButtonRelease
684 || button == AnyButton)) {
685 button = 3;
686 } else {
687 button -= Button1;
688 if(button >= 3)
689 button += 64 - 3;
690 if(e->xbutton.type == ButtonPress) {
691 ob = button;
692 ox = x, oy = y;
693 }
694 }
695
696 button += (state & ShiftMask ? 4 : 0)
697 + (state & Mod4Mask ? 8 : 0)
698 + (state & ControlMask ? 16 : 0);
699
700 len = 0;
701 if(IS_SET(MODE_MOUSESGR)) {
702 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
703 button, x+1, y+1,
704 e->xbutton.type == ButtonRelease ? 'm' : 'M');
705 } else if(x < 223 && y < 223) {
706 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
707 32+button, 32+x+1, 32+y+1);
708 } else {
709 return;
710 }
711
712 ttywrite(buf, len);
713 }
714
715 void
716 bpress(XEvent *e) {
717 if(IS_SET(MODE_MOUSE)) {
718 mousereport(e);
719 } else if(e->xbutton.button == Button1) {
720 if(sel.bx != -1) {
721 sel.bx = -1;
722 tsetdirt(sel.b.y, sel.e.y);
723 draw();
724 }
725 sel.mode = 1;
726 sel.ex = sel.bx = x2col(e->xbutton.x);
727 sel.ey = sel.by = y2row(e->xbutton.y);
728 } else if(e->xbutton.button == Button4) {
729 ttywrite("\031", 1);
730 } else if(e->xbutton.button == Button5) {
731 ttywrite("\005", 1);
732 }
733 }
734
735 void
736 selcopy(void) {
737 char *str, *ptr, *p;
738 int x, y, bufsize, is_selected = 0, size;
739 Glyph *gp, *last;
740
741 if(sel.bx == -1) {
742 str = NULL;
743 } else {
744 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
745 ptr = str = xmalloc(bufsize);
746
747 /* append every set & selected glyph to the selection */
748 for(y = 0; y < term.row; y++) {
749 gp = &term.line[y][0];
750 last = gp + term.col;
751
752 while(--last >= gp && !(last->state & GLYPH_SET))
753 /* nothing */;
754
755 for(x = 0; gp <= last; x++, ++gp) {
756 if(!(is_selected = selected(x, y)))
757 continue;
758
759 p = (gp->state & GLYPH_SET) ? gp->c : " ";
760 size = utf8size(p);
761 memcpy(ptr, p, size);
762 ptr += size;
763 }
764 /* \n at the end of every selected line except for the last one */
765 if(is_selected && y < sel.e.y)
766 *ptr++ = '\n';
767 }
768 *ptr = 0;
769 }
770 xsetsel(str);
771 }
772
773 void
774 selnotify(XEvent *e) {
775 ulong nitems, ofs, rem;
776 int format;
777 uchar *data;
778 Atom type;
779
780 ofs = 0;
781 do {
782 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
783 False, AnyPropertyType, &type, &format,
784 &nitems, &rem, &data)) {
785 fprintf(stderr, "Clipboard allocation failed\n");
786 return;
787 }
788 ttywrite((const char *) data, nitems * format / 8);
789 XFree(data);
790 /* number of 32-bit chunks returned */
791 ofs += nitems * format / 32;
792 } while(rem > 0);
793 }
794
795 void
796 selpaste(const Arg *dummy) {
797 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
798 xw.win, CurrentTime);
799 }
800
801 void selclear(XEvent *e) {
802 if(sel.bx == -1)
803 return;
804 sel.bx = -1;
805 tsetdirt(sel.b.y, sel.e.y);
806 }
807
808 void
809 selrequest(XEvent *e) {
810 fprintf(stderr, "selrequest\n");
811 XSelectionRequestEvent *xsre;
812 XSelectionEvent xev;
813 Atom xa_targets, string;
814
815 xsre = (XSelectionRequestEvent *) e;
816 xev.type = SelectionNotify;
817 xev.requestor = xsre->requestor;
818 xev.selection = xsre->selection;
819 xev.target = xsre->target;
820 xev.time = xsre->time;
821 /* reject */
822 xev.property = None;
823
824 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
825 if(xsre->target == xa_targets) {
826 /* respond with the supported type */
827 string = sel.xtarget;
828 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
829 XA_ATOM, 32, PropModeReplace,
830 (uchar *) &string, 1);
831 xev.property = xsre->property;
832 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
833 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
834 xsre->target, 8, PropModeReplace,
835 (uchar *) sel.clip, strlen(sel.clip));
836 xev.property = xsre->property;
837 }
838
839 /* all done, send a notification to the listener */
840 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
841 fprintf(stderr, "Error sending SelectionNotify event\n");
842 }
843
844 void
845 xsetsel(char *str) {
846 fprintf(stderr, "xsetsel: %s\n", str);
847 /* register the selection for both the clipboard and the primary */
848 Atom clipboard;
849
850 free(sel.clip);
851 sel.clip = str;
852
853 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
854
855 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
856 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
857 }
858
859 void
860 brelease(XEvent *e) {
861 struct timeval now;
862
863 if(IS_SET(MODE_MOUSE)) {
864 mousereport(e);
865 return;
866 }
867
868 if(e->xbutton.button == Button2) {
869 selpaste(NULL);
870 } else if(e->xbutton.button == Button1) {
871 sel.mode = 0;
872 getbuttoninfo(e);
873 term.dirty[sel.ey] = 1;
874 if(sel.bx == sel.ex && sel.by == sel.ey) {
875 sel.bx = -1;
876 gettimeofday(&now, NULL);
877
878 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
879 /* triple click on the line */
880 sel.b.x = sel.bx = 0;
881 sel.e.x = sel.ex = term.col;
882 sel.b.y = sel.e.y = sel.ey;
883 selcopy();
884 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
885 /* double click to select word */
886 sel.bx = sel.ex;
887 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
888 term.line[sel.ey][sel.bx-1].c[0] != ' ') {
889 sel.bx--;
890 }
891 sel.b.x = sel.bx;
892 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
893 term.line[sel.ey][sel.ex+1].c[0] != ' ') {
894 sel.ex++;
895 }
896 sel.e.x = sel.ex;
897 sel.b.y = sel.e.y = sel.ey;
898 selcopy();
899 }
900 } else {
901 selcopy();
902 }
903 }
904
905 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
906 gettimeofday(&sel.tclick1, NULL);
907 }
908
909 void
910 bmotion(XEvent *e) {
911 int starty, endy, oldey, oldex;
912
913 if(IS_SET(MODE_MOUSE)) {
914 mousereport(e);
915 return;
916 }
917
918 if(!sel.mode)
919 return;
920
921 oldey = sel.ey;
922 oldex = sel.ex;
923 getbuttoninfo(e);
924
925 if(oldey != sel.ey || oldex != sel.ex) {
926 starty = MIN(oldey, sel.ey);
927 endy = MAX(oldey, sel.ey);
928 tsetdirt(starty, endy);
929 }
930 }
931
932 void
933 die(const char *errstr, ...) {
934 va_list ap;
935
936 va_start(ap, errstr);
937 vfprintf(stderr, errstr, ap);
938 va_end(ap);
939 exit(EXIT_FAILURE);
940 }
941
942 void
943 execsh(void) {
944 char **args;
945 char *envshell = getenv("SHELL");
946 const struct passwd *pass = getpwuid(getuid());
947 char buf[sizeof(long) * 8 + 1];
948
949 unsetenv("COLUMNS");
950 unsetenv("LINES");
951 unsetenv("TERMCAP");
952
953 if(pass) {
954 setenv("LOGNAME", pass->pw_name, 1);
955 setenv("USER", pass->pw_name, 1);
956 setenv("SHELL", pass->pw_shell, 0);
957 setenv("HOME", pass->pw_dir, 0);
958 }
959
960 snprintf(buf, sizeof(buf), "%lu", xw.win);
961 setenv("WINDOWID", buf, 1);
962
963 signal(SIGCHLD, SIG_DFL);
964 signal(SIGHUP, SIG_DFL);
965 signal(SIGINT, SIG_DFL);
966 signal(SIGQUIT, SIG_DFL);
967 signal(SIGTERM, SIG_DFL);
968 signal(SIGALRM, SIG_DFL);
969
970 DEFAULT(envshell, shell);
971 setenv("TERM", termname, 1);
972 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
973 execvp(args[0], args);
974 exit(EXIT_FAILURE);
975 }
976
977 void
978 sigchld(int a) {
979 int stat = 0;
980
981 if(waitpid(pid, &stat, 0) < 0)
982 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
983
984 if(WIFEXITED(stat)) {
985 exit(WEXITSTATUS(stat));
986 } else {
987 exit(EXIT_FAILURE);
988 }
989 }
990
991 void
992 ttynew(void) {
993 int m, s;
994 struct winsize w = {term.row, term.col, 0, 0};
995
996 /* seems to work fine on linux, openbsd and freebsd */
997 if(openpty(&m, &s, NULL, NULL, &w) < 0)
998 die("openpty failed: %s\n", SERRNO);
999
1000 switch(pid = fork()) {
1001 case -1:
1002 die("fork failed\n");
1003 break;
1004 case 0:
1005 setsid(); /* create a new process group */
1006 dup2(s, STDIN_FILENO);
1007 dup2(s, STDOUT_FILENO);
1008 dup2(s, STDERR_FILENO);
1009 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1010 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1011 close(s);
1012 close(m);
1013 execsh();
1014 break;
1015 default:
1016 close(s);
1017 cmdfd = m;
1018 signal(SIGCHLD, sigchld);
1019 if(opt_io) {
1020 iofd = (!strcmp(opt_io, "-")) ?
1021 STDOUT_FILENO :
1022 open(opt_io, O_WRONLY | O_CREAT, 0666);
1023 if(iofd < 0) {
1024 fprintf(stderr, "Error opening %s:%s\n",
1025 opt_io, strerror(errno));
1026 }
1027 }
1028 }
1029 }
1030
1031 void
1032 dump(char c) {
1033 static int col;
1034
1035 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1036 if(++col % 10 == 0)
1037 fprintf(stderr, "\n");
1038 }
1039
1040 void
1041 ttyread(void) {
1042 static char buf[BUFSIZ];
1043 static int buflen = 0;
1044 char *ptr;
1045 char s[UTF_SIZ];
1046 int charsize; /* size of utf8 char in bytes */
1047 long utf8c;
1048 int ret;
1049
1050 /* append read bytes to unprocessed bytes */
1051 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1052 die("Couldn't read from shell: %s\n", SERRNO);
1053
1054 /* process every complete utf8 char */
1055 buflen += ret;
1056 ptr = buf;
1057 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1058 charsize = utf8decode(ptr, &utf8c);
1059 utf8encode(&utf8c, s);
1060 tputc(s, charsize);
1061 ptr += charsize;
1062 buflen -= charsize;
1063 }
1064
1065 /* keep any uncomplete utf8 char for the next call */
1066 memmove(buf, ptr, buflen);
1067 }
1068
1069 void
1070 ttywrite(const char *s, size_t n) {
1071 if(write(cmdfd, s, n) == -1)
1072 die("write error on tty: %s\n", SERRNO);
1073 }
1074
1075 void
1076 ttyresize(void) {
1077 struct winsize w;
1078
1079 w.ws_row = term.row;
1080 w.ws_col = term.col;
1081 w.ws_xpixel = xw.tw;
1082 w.ws_ypixel = xw.th;
1083 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1084 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1085 }
1086
1087 void
1088 tsetdirt(int top, int bot) {
1089 int i;
1090
1091 LIMIT(top, 0, term.row-1);
1092 LIMIT(bot, 0, term.row-1);
1093
1094 for(i = top; i <= bot; i++)
1095 term.dirty[i] = 1;
1096 }
1097
1098 void
1099 tfulldirt(void) {
1100 tsetdirt(0, term.row-1);
1101 }
1102
1103 void
1104 tcursor(int mode) {
1105 static TCursor c;
1106
1107 if(mode == CURSOR_SAVE) {
1108 c = term.c;
1109 } else if(mode == CURSOR_LOAD) {
1110 term.c = c;
1111 tmoveto(c.x, c.y);
1112 }
1113 }
1114
1115 void
1116 treset(void) {
1117 uint i;
1118
1119 term.c = (TCursor){{
1120 .mode = ATTR_NULL,
1121 .fg = defaultfg,
1122 .bg = defaultbg
1123 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1124
1125 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1126 for(i = tabspaces; i < term.col; i += tabspaces)
1127 term.tabs[i] = 1;
1128 term.top = 0;
1129 term.bot = term.row - 1;
1130 term.mode = MODE_WRAP;
1131
1132 tclearregion(0, 0, term.col-1, term.row-1, 0);
1133 tmoveto(0, 0);
1134 tcursor(CURSOR_SAVE);
1135 }
1136
1137 void
1138 tnew(int col, int row) {
1139 /* set screen size */
1140 term.row = row;
1141 term.col = col;
1142 term.line = xmalloc(term.row * sizeof(Line));
1143 term.alt = xmalloc(term.row * sizeof(Line));
1144 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
1145 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
1146
1147 for(row = 0; row < term.row; row++) {
1148 term.line[row] = xmalloc(term.col * sizeof(Glyph));
1149 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
1150 term.dirty[row] = 0;
1151 }
1152
1153 term.numlock = 1;
1154 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1155 /* setup screen */
1156 treset();
1157 }
1158
1159 void
1160 tswapscreen(void) {
1161 Line *tmp = term.line;
1162
1163 term.line = term.alt;
1164 term.alt = tmp;
1165 term.mode ^= MODE_ALTSCREEN;
1166 tfulldirt();
1167 }
1168
1169 void
1170 tscrolldown(int orig, int n) {
1171 int i;
1172 Line temp;
1173
1174 LIMIT(n, 0, term.bot-orig+1);
1175
1176 tclearregion(0, term.bot-n+1, term.col-1, term.bot, 0);
1177
1178 for(i = term.bot; i >= orig+n; i--) {
1179 temp = term.line[i];
1180 term.line[i] = term.line[i-n];
1181 term.line[i-n] = temp;
1182
1183 term.dirty[i] = 1;
1184 term.dirty[i-n] = 1;
1185 }
1186
1187 selscroll(orig, n);
1188 }
1189
1190 void
1191 tscrollup(int orig, int n) {
1192 int i;
1193 Line temp;
1194 LIMIT(n, 0, term.bot-orig+1);
1195
1196 tclearregion(0, orig, term.col-1, orig+n-1, 0);
1197
1198 for(i = orig; i <= term.bot-n; i++) {
1199 temp = term.line[i];
1200 term.line[i] = term.line[i+n];
1201 term.line[i+n] = temp;
1202
1203 term.dirty[i] = 1;
1204 term.dirty[i+n] = 1;
1205 }
1206
1207 selscroll(orig, -n);
1208 }
1209
1210 void
1211 selscroll(int orig, int n) {
1212 if(sel.bx == -1)
1213 return;
1214
1215 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1216 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1217 sel.bx = -1;
1218 return;
1219 }
1220 if(sel.by < term.top) {
1221 sel.by = term.top;
1222 sel.bx = 0;
1223 }
1224 if(sel.ey > term.bot) {
1225 sel.ey = term.bot;
1226 sel.ex = term.col;
1227 }
1228 sel.b.y = sel.by, sel.b.x = sel.bx;
1229 sel.e.y = sel.ey, sel.e.x = sel.ex;
1230 }
1231 }
1232
1233 void
1234 tnewline(int first_col) {
1235 int y = term.c.y;
1236
1237 if(y == term.bot) {
1238 tscrollup(term.top, 1);
1239 } else {
1240 y++;
1241 }
1242 tmoveto(first_col ? 0 : term.c.x, y);
1243 }
1244
1245 void
1246 csiparse(void) {
1247 /* int noarg = 1; */
1248 char *p = csiescseq.buf;
1249
1250 csiescseq.narg = 0;
1251 if(*p == '?')
1252 csiescseq.priv = 1, p++;
1253
1254 while(p < csiescseq.buf+csiescseq.len) {
1255 while(isdigit(*p)) {
1256 csiescseq.arg[csiescseq.narg] *= 10;
1257 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1258 }
1259 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ) {
1260 csiescseq.narg++, p++;
1261 } else {
1262 csiescseq.mode = *p;
1263 csiescseq.narg++;
1264
1265 return;
1266 }
1267 }
1268 }
1269
1270 /* for absolute user moves, when decom is set */
1271 void
1272 tmoveato(int x, int y) {
1273 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1274 }
1275
1276 void
1277 tmoveto(int x, int y) {
1278 int miny, maxy;
1279
1280 if(term.c.state & CURSOR_ORIGIN) {
1281 miny = term.top;
1282 maxy = term.bot;
1283 } else {
1284 miny = 0;
1285 maxy = term.row - 1;
1286 }
1287 LIMIT(x, 0, term.col-1);
1288 LIMIT(y, miny, maxy);
1289 term.c.state &= ~CURSOR_WRAPNEXT;
1290 term.c.x = x;
1291 term.c.y = y;
1292 }
1293
1294 void
1295 tsetchar(char *c, Glyph *attr, int x, int y) {
1296 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1297 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1298 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1299 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1300 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1301 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1302 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1303 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1304 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1305 };
1306
1307 /*
1308 * The table is proudly stolen from rxvt.
1309 */
1310 if(attr->mode & ATTR_GFX) {
1311 if(c[0] >= 0x41 && c[0] <= 0x7e
1312 && vt100_0[c[0] - 0x41]) {
1313 c = vt100_0[c[0] - 0x41];
1314 }
1315 }
1316
1317 term.dirty[y] = 1;
1318 term.line[y][x] = *attr;
1319 memcpy(term.line[y][x].c, c, UTF_SIZ);
1320 term.line[y][x].state |= GLYPH_SET;
1321 }
1322
1323 void
1324 tclearregion(int x1, int y1, int x2, int y2, int bce) {
1325 int x, y, temp;
1326
1327 if(x1 > x2)
1328 temp = x1, x1 = x2, x2 = temp;
1329 if(y1 > y2)
1330 temp = y1, y1 = y2, y2 = temp;
1331
1332 LIMIT(x1, 0, term.col-1);
1333 LIMIT(x2, 0, term.col-1);
1334 LIMIT(y1, 0, term.row-1);
1335 LIMIT(y2, 0, term.row-1);
1336
1337 for(y = y1; y <= y2; y++) {
1338 term.dirty[y] = 1;
1339 for(x = x1; x <= x2; x++) {
1340 if(bce) {
1341 term.line[y][x] = term.c.attr;
1342 memcpy(term.line[y][x].c, " ", 2);
1343 term.line[y][x].state |= GLYPH_SET;
1344 } else {
1345 term.line[y][x].state = 0;
1346 }
1347 }
1348 }
1349 }
1350
1351 void
1352 tdeletechar(int n) {
1353 int src = term.c.x + n;
1354 int dst = term.c.x;
1355 int size = term.col - src;
1356
1357 term.dirty[term.c.y] = 1;
1358
1359 if(src >= term.col) {
1360 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1361 return;
1362 }
1363
1364 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1365 size * sizeof(Glyph));
1366 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y, 0);
1367 }
1368
1369 void
1370 tinsertblank(int n) {
1371 int src = term.c.x;
1372 int dst = src + n;
1373 int size = term.col - dst;
1374
1375 term.dirty[term.c.y] = 1;
1376
1377 if(dst >= term.col) {
1378 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1379 return;
1380 }
1381
1382 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1383 size * sizeof(Glyph));
1384 tclearregion(src, term.c.y, dst - 1, term.c.y, 0);
1385 }
1386
1387 void
1388 tinsertblankline(int n) {
1389 if(term.c.y < term.top || term.c.y > term.bot)
1390 return;
1391
1392 tscrolldown(term.c.y, n);
1393 }
1394
1395 void
1396 tdeleteline(int n) {
1397 if(term.c.y < term.top || term.c.y > term.bot)
1398 return;
1399
1400 tscrollup(term.c.y, n);
1401 }
1402
1403 void
1404 tsetattr(int *attr, int l) {
1405 int i;
1406
1407 for(i = 0; i < l; i++) {
1408 switch(attr[i]) {
1409 case 0:
1410 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1411 | ATTR_ITALIC | ATTR_BLINK);
1412 term.c.attr.fg = defaultfg;
1413 term.c.attr.bg = defaultbg;
1414 break;
1415 case 1:
1416 term.c.attr.mode |= ATTR_BOLD;
1417 break;
1418 case 3:
1419 term.c.attr.mode |= ATTR_ITALIC;
1420 break;
1421 case 4:
1422 term.c.attr.mode |= ATTR_UNDERLINE;
1423 break;
1424 case 5: /* slow blink */
1425 case 6: /* rapid blink */
1426 term.c.attr.mode |= ATTR_BLINK;
1427 break;
1428 case 7:
1429 term.c.attr.mode |= ATTR_REVERSE;
1430 break;
1431 case 21:
1432 case 22:
1433 term.c.attr.mode &= ~ATTR_BOLD;
1434 break;
1435 case 23:
1436 term.c.attr.mode &= ~ATTR_ITALIC;
1437 break;
1438 case 24:
1439 term.c.attr.mode &= ~ATTR_UNDERLINE;
1440 break;
1441 case 25:
1442 case 26:
1443 term.c.attr.mode &= ~ATTR_BLINK;
1444 break;
1445 case 27:
1446 term.c.attr.mode &= ~ATTR_REVERSE;
1447 break;
1448 case 38:
1449 if(i + 2 < l && attr[i + 1] == 5) {
1450 i += 2;
1451 if(BETWEEN(attr[i], 0, 255)) {
1452 term.c.attr.fg = attr[i];
1453 } else {
1454 fprintf(stderr,
1455 "erresc: bad fgcolor %d\n",
1456 attr[i]);
1457 }
1458 } else {
1459 fprintf(stderr,
1460 "erresc(38): gfx attr %d unknown\n",
1461 attr[i]);
1462 }
1463 break;
1464 case 39:
1465 term.c.attr.fg = defaultfg;
1466 break;
1467 case 48:
1468 if(i + 2 < l && attr[i + 1] == 5) {
1469 i += 2;
1470 if(BETWEEN(attr[i], 0, 255)) {
1471 term.c.attr.bg = attr[i];
1472 } else {
1473 fprintf(stderr,
1474 "erresc: bad bgcolor %d\n",
1475 attr[i]);
1476 }
1477 } else {
1478 fprintf(stderr,
1479 "erresc(48): gfx attr %d unknown\n",
1480 attr[i]);
1481 }
1482 break;
1483 case 49:
1484 term.c.attr.bg = defaultbg;
1485 break;
1486 default:
1487 if(BETWEEN(attr[i], 30, 37)) {
1488 term.c.attr.fg = attr[i] - 30;
1489 } else if(BETWEEN(attr[i], 40, 47)) {
1490 term.c.attr.bg = attr[i] - 40;
1491 } else if(BETWEEN(attr[i], 90, 97)) {
1492 term.c.attr.fg = attr[i] - 90 + 8;
1493 } else if(BETWEEN(attr[i], 100, 107)) {
1494 term.c.attr.bg = attr[i] - 100 + 8;
1495 } else {
1496 fprintf(stderr,
1497 "erresc(default): gfx attr %d unknown\n",
1498 attr[i]), csidump();
1499 }
1500 break;
1501 }
1502 }
1503 }
1504
1505 void
1506 tsetscroll(int t, int b) {
1507 int temp;
1508
1509 LIMIT(t, 0, term.row-1);
1510 LIMIT(b, 0, term.row-1);
1511 if(t > b) {
1512 temp = t;
1513 t = b;
1514 b = temp;
1515 }
1516 term.top = t;
1517 term.bot = b;
1518 }
1519
1520 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1521
1522 void
1523 tsetmode(bool priv, bool set, int *args, int narg) {
1524 int *lim, mode;
1525 bool alt;
1526
1527 for(lim = args + narg; args < lim; ++args) {
1528 if(priv) {
1529 switch(*args) {
1530 break;
1531 case 1: /* DECCKM -- Cursor key */
1532 MODBIT(term.mode, set, MODE_APPCURSOR);
1533 break;
1534 case 5: /* DECSCNM -- Reverse video */
1535 mode = term.mode;
1536 MODBIT(term.mode, set, MODE_REVERSE);
1537 if(mode != term.mode)
1538 redraw(REDRAW_TIMEOUT);
1539 break;
1540 case 6: /* DECOM -- Origin */
1541 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1542 tmoveato(0, 0);
1543 break;
1544 case 7: /* DECAWM -- Auto wrap */
1545 MODBIT(term.mode, set, MODE_WRAP);
1546 break;
1547 case 0: /* Error (IGNORED) */
1548 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1549 case 3: /* DECCOLM -- Column (IGNORED) */
1550 case 4: /* DECSCLM -- Scroll (IGNORED) */
1551 case 8: /* DECARM -- Auto repeat (IGNORED) */
1552 case 18: /* DECPFF -- Printer feed (IGNORED) */
1553 case 19: /* DECPEX -- Printer extent (IGNORED) */
1554 case 42: /* DECNRCM -- National characters (IGNORED) */
1555 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1556 break;
1557 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1558 MODBIT(term.mode, !set, MODE_HIDE);
1559 break;
1560 case 1000: /* 1000,1002: enable xterm mouse report */
1561 MODBIT(term.mode, set, MODE_MOUSEBTN);
1562 break;
1563 case 1002:
1564 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1565 break;
1566 case 1006:
1567 MODBIT(term.mode, set, MODE_MOUSESGR);
1568 break;
1569 case 1049: /* = 1047 and 1048 */
1570 case 47:
1571 case 1047: {
1572 alt = IS_SET(MODE_ALTSCREEN);
1573 if(alt) {
1574 tclearregion(0, 0, term.col-1,
1575 term.row-1, 0);
1576 }
1577 if(set ^ alt) /* set is always 1 or 0 */
1578 tswapscreen();
1579 if(*args != 1049)
1580 break;
1581 }
1582 /* pass through */
1583 case 1048:
1584 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1585 break;
1586 default:
1587 fprintf(stderr,
1588 "erresc: unknown private set/reset mode %d\n",
1589 *args);
1590 break;
1591 }
1592 } else {
1593 switch(*args) {
1594 case 0: /* Error (IGNORED) */
1595 break;
1596 case 2: /* KAM -- keyboard action */
1597 MODBIT(term.mode, set, MODE_KBDLOCK);
1598 break;
1599 case 4: /* IRM -- Insertion-replacement */
1600 MODBIT(term.mode, set, MODE_INSERT);
1601 break;
1602 case 12: /* SRM -- Send/Receive */
1603 MODBIT(term.mode, !set, MODE_ECHO);
1604 break;
1605 case 20: /* LNM -- Linefeed/new line */
1606 MODBIT(term.mode, set, MODE_CRLF);
1607 break;
1608 default:
1609 fprintf(stderr,
1610 "erresc: unknown set/reset mode %d\n",
1611 *args);
1612 break;
1613 }
1614 }
1615 }
1616 }
1617 #undef MODBIT
1618
1619
1620 void
1621 csihandle(void) {
1622 switch(csiescseq.mode) {
1623 default:
1624 unknown:
1625 fprintf(stderr, "erresc: unknown csi ");
1626 csidump();
1627 /* die(""); */
1628 break;
1629 case '@': /* ICH -- Insert <n> blank char */
1630 DEFAULT(csiescseq.arg[0], 1);
1631 tinsertblank(csiescseq.arg[0]);
1632 break;
1633 case 'A': /* CUU -- Cursor <n> Up */
1634 DEFAULT(csiescseq.arg[0], 1);
1635 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1636 break;
1637 case 'B': /* CUD -- Cursor <n> Down */
1638 case 'e': /* VPR --Cursor <n> Down */
1639 DEFAULT(csiescseq.arg[0], 1);
1640 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1641 break;
1642 case 'c': /* DA -- Device Attributes */
1643 if(csiescseq.arg[0] == 0)
1644 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1645 break;
1646 case 'C': /* CUF -- Cursor <n> Forward */
1647 case 'a': /* HPR -- Cursor <n> Forward */
1648 DEFAULT(csiescseq.arg[0], 1);
1649 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1650 break;
1651 case 'D': /* CUB -- Cursor <n> Backward */
1652 DEFAULT(csiescseq.arg[0], 1);
1653 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1654 break;
1655 case 'E': /* CNL -- Cursor <n> Down and first col */
1656 DEFAULT(csiescseq.arg[0], 1);
1657 tmoveto(0, term.c.y+csiescseq.arg[0]);
1658 break;
1659 case 'F': /* CPL -- Cursor <n> Up and first col */
1660 DEFAULT(csiescseq.arg[0], 1);
1661 tmoveto(0, term.c.y-csiescseq.arg[0]);
1662 break;
1663 case 'g': /* TBC -- Tabulation clear */
1664 switch (csiescseq.arg[0]) {
1665 case 0: /* clear current tab stop */
1666 term.tabs[term.c.x] = 0;
1667 break;
1668 case 3: /* clear all the tabs */
1669 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1670 break;
1671 default:
1672 goto unknown;
1673 }
1674 break;
1675 case 'G': /* CHA -- Move to <col> */
1676 case '`': /* HPA */
1677 DEFAULT(csiescseq.arg[0], 1);
1678 tmoveto(csiescseq.arg[0]-1, term.c.y);
1679 break;
1680 case 'H': /* CUP -- Move to <row> <col> */
1681 case 'f': /* HVP */
1682 DEFAULT(csiescseq.arg[0], 1);
1683 DEFAULT(csiescseq.arg[1], 1);
1684 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1685 break;
1686 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1687 DEFAULT(csiescseq.arg[0], 1);
1688 while(csiescseq.arg[0]--)
1689 tputtab(1);
1690 break;
1691 case 'J': /* ED -- Clear screen */
1692 sel.bx = -1;
1693 switch(csiescseq.arg[0]) {
1694 case 0: /* below */
1695 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 1);
1696 if(term.c.y < term.row-1) {
1697 tclearregion(0, term.c.y+1, term.col-1,
1698 term.row-1, 1);
1699 }
1700 break;
1701 case 1: /* above */
1702 if(term.c.y > 1)
1703 tclearregion(0, 0, term.col-1, term.c.y-1, 1);
1704 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1705 break;
1706 case 2: /* all */
1707 tclearregion(0, 0, term.col-1, term.row-1, 1);
1708 break;
1709 default:
1710 goto unknown;
1711 }
1712 break;
1713 case 'K': /* EL -- Clear line */
1714 switch(csiescseq.arg[0]) {
1715 case 0: /* right */
1716 tclearregion(term.c.x, term.c.y, term.col-1,
1717 term.c.y, 1);
1718 break;
1719 case 1: /* left */
1720 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1721 break;
1722 case 2: /* all */
1723 tclearregion(0, term.c.y, term.col-1, term.c.y, 1);
1724 break;
1725 }
1726 break;
1727 case 'S': /* SU -- Scroll <n> line up */
1728 DEFAULT(csiescseq.arg[0], 1);
1729 tscrollup(term.top, csiescseq.arg[0]);
1730 break;
1731 case 'T': /* SD -- Scroll <n> line down */
1732 DEFAULT(csiescseq.arg[0], 1);
1733 tscrolldown(term.top, csiescseq.arg[0]);
1734 break;
1735 case 'L': /* IL -- Insert <n> blank lines */
1736 DEFAULT(csiescseq.arg[0], 1);
1737 tinsertblankline(csiescseq.arg[0]);
1738 break;
1739 case 'l': /* RM -- Reset Mode */
1740 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1741 break;
1742 case 'M': /* DL -- Delete <n> lines */
1743 DEFAULT(csiescseq.arg[0], 1);
1744 tdeleteline(csiescseq.arg[0]);
1745 break;
1746 case 'X': /* ECH -- Erase <n> char */
1747 DEFAULT(csiescseq.arg[0], 1);
1748 tclearregion(term.c.x, term.c.y,
1749 term.c.x + csiescseq.arg[0] - 1, term.c.y, 1);
1750 break;
1751 case 'P': /* DCH -- Delete <n> char */
1752 DEFAULT(csiescseq.arg[0], 1);
1753 tdeletechar(csiescseq.arg[0]);
1754 break;
1755 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1756 DEFAULT(csiescseq.arg[0], 1);
1757 while(csiescseq.arg[0]--)
1758 tputtab(0);
1759 break;
1760 case 'd': /* VPA -- Move to <row> */
1761 DEFAULT(csiescseq.arg[0], 1);
1762 tmoveato(term.c.x, csiescseq.arg[0]-1);
1763 break;
1764 case 'h': /* SM -- Set terminal mode */
1765 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1766 break;
1767 case 'm': /* SGR -- Terminal attribute (color) */
1768 tsetattr(csiescseq.arg, csiescseq.narg);
1769 break;
1770 case 'r': /* DECSTBM -- Set Scrolling Region */
1771 if(csiescseq.priv) {
1772 goto unknown;
1773 } else {
1774 DEFAULT(csiescseq.arg[0], 1);
1775 DEFAULT(csiescseq.arg[1], term.row);
1776 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1777 tmoveato(0, 0);
1778 }
1779 break;
1780 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1781 tcursor(CURSOR_SAVE);
1782 break;
1783 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1784 tcursor(CURSOR_LOAD);
1785 break;
1786 }
1787 }
1788
1789 void
1790 csidump(void) {
1791 int i;
1792 uint c;
1793
1794 printf("ESC[");
1795 for(i = 0; i < csiescseq.len; i++) {
1796 c = csiescseq.buf[i] & 0xff;
1797 if(isprint(c)) {
1798 putchar(c);
1799 } else if(c == '\n') {
1800 printf("(\\n)");
1801 } else if(c == '\r') {
1802 printf("(\\r)");
1803 } else if(c == 0x1b) {
1804 printf("(\\e)");
1805 } else {
1806 printf("(%02x)", c);
1807 }
1808 }
1809 putchar('\n');
1810 }
1811
1812 void
1813 csireset(void) {
1814 memset(&csiescseq, 0, sizeof(csiescseq));
1815 }
1816
1817 void
1818 strhandle(void) {
1819 char *p;
1820
1821 /*
1822 * TODO: make this being useful in case of color palette change.
1823 */
1824 strparse();
1825
1826 p = strescseq.buf;
1827
1828 switch(strescseq.type) {
1829 case ']': /* OSC -- Operating System Command */
1830 switch(p[0]) {
1831 case '0':
1832 case '1':
1833 case '2':
1834 /*
1835 * TODO: Handle special chars in string, like umlauts.
1836 */
1837 if(p[1] == ';') {
1838 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1839 }
1840 break;
1841 case ';':
1842 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1843 break;
1844 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1845 break;
1846 default:
1847 fprintf(stderr, "erresc: unknown str ");
1848 strdump();
1849 break;
1850 }
1851 break;
1852 case 'k': /* old title set compatibility */
1853 XStoreName(xw.dpy, xw.win, strescseq.buf);
1854 break;
1855 case 'P': /* DSC -- Device Control String */
1856 case '_': /* APC -- Application Program Command */
1857 case '^': /* PM -- Privacy Message */
1858 default:
1859 fprintf(stderr, "erresc: unknown str ");
1860 strdump();
1861 /* die(""); */
1862 break;
1863 }
1864 }
1865
1866 void
1867 strparse(void) {
1868 /*
1869 * TODO: Implement parsing like for CSI when required.
1870 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1871 */
1872 return;
1873 }
1874
1875 void
1876 strdump(void) {
1877 int i;
1878 uint c;
1879
1880 printf("ESC%c", strescseq.type);
1881 for(i = 0; i < strescseq.len; i++) {
1882 c = strescseq.buf[i] & 0xff;
1883 if(isprint(c)) {
1884 putchar(c);
1885 } else if(c == '\n') {
1886 printf("(\\n)");
1887 } else if(c == '\r') {
1888 printf("(\\r)");
1889 } else if(c == 0x1b) {
1890 printf("(\\e)");
1891 } else {
1892 printf("(%02x)", c);
1893 }
1894 }
1895 printf("ESC\\\n");
1896 }
1897
1898 void
1899 strreset(void) {
1900 memset(&strescseq, 0, sizeof(strescseq));
1901 }
1902
1903 void
1904 tputtab(bool forward) {
1905 uint x = term.c.x;
1906
1907 if(forward) {
1908 if(x == term.col)
1909 return;
1910 for(++x; x < term.col && !term.tabs[x]; ++x)
1911 /* nothing */ ;
1912 } else {
1913 if(x == 0)
1914 return;
1915 for(--x; x > 0 && !term.tabs[x]; --x)
1916 /* nothing */ ;
1917 }
1918 tmoveto(x, term.c.y);
1919 }
1920
1921 void
1922 techo(char *buf, int len) {
1923 for(; len > 0; buf++, len--) {
1924 char c = *buf;
1925
1926 if(c == '\033') { /* escape */
1927 tputc("^", 1);
1928 tputc("[", 1);
1929 } else if (c < '\x20') { /* control code */
1930 if(c != '\n' && c != '\r' && c != '\t') {
1931 c |= '\x40';
1932 tputc("^", 1);
1933 }
1934 tputc(&c, 1);
1935 } else {
1936 break;
1937 }
1938 }
1939 if (len)
1940 tputc(buf, len);
1941 }
1942
1943 void
1944 tputc(char *c, int len) {
1945 uchar ascii = *c;
1946 bool control = ascii < '\x20' || ascii == 0177;
1947
1948 if(iofd != -1) {
1949 if (xwrite(iofd, c, len) < 0) {
1950 fprintf(stderr, "Error writing in %s:%s\n",
1951 opt_io, strerror(errno));
1952 close(iofd);
1953 iofd = -1;
1954 }
1955 }
1956
1957 /*
1958 * STR sequences must be checked before anything else
1959 * because it can use some control codes as part of the sequence.
1960 */
1961 if(term.esc & ESC_STR) {
1962 switch(ascii) {
1963 case '\033':
1964 term.esc = ESC_START | ESC_STR_END;
1965 break;
1966 case '\a': /* backwards compatibility to xterm */
1967 term.esc = 0;
1968 strhandle();
1969 break;
1970 default:
1971 if(strescseq.len + len < sizeof(strescseq.buf)) {
1972 memmove(&strescseq.buf[strescseq.len], c, len);
1973 strescseq.len += len;
1974 } else {
1975 /*
1976 * Here is a bug in terminals. If the user never sends
1977 * some code to stop the str or esc command, then st
1978 * will stop responding. But this is better than
1979 * silently failing with unknown characters. At least
1980 * then users will report back.
1981 *
1982 * In the case users ever get fixed, here is the code:
1983 */
1984 /*
1985 * term.esc = 0;
1986 * strhandle();
1987 */
1988 }
1989 }
1990 return;
1991 }
1992
1993 /*
1994 * Actions of control codes must be performed as soon they arrive
1995 * because they can be embedded inside a control sequence, and
1996 * they must not cause conflicts with sequences.
1997 */
1998 if(control) {
1999 switch(ascii) {
2000 case '\t': /* HT */
2001 tputtab(1);
2002 return;
2003 case '\b': /* BS */
2004 tmoveto(term.c.x-1, term.c.y);
2005 return;
2006 case '\r': /* CR */
2007 tmoveto(0, term.c.y);
2008 return;
2009 case '\f': /* LF */
2010 case '\v': /* VT */
2011 case '\n': /* LF */
2012 /* go to first col if the mode is set */
2013 tnewline(IS_SET(MODE_CRLF));
2014 return;
2015 case '\a': /* BEL */
2016 if(!(xw.state & WIN_FOCUSED))
2017 xseturgency(1);
2018 return;
2019 case '\033': /* ESC */
2020 csireset();
2021 term.esc = ESC_START;
2022 return;
2023 case '\016': /* SO */
2024 case '\017': /* SI */
2025 /*
2026 * Different charsets are hard to handle. Applications
2027 * should use the right alt charset escapes for the
2028 * only reason they still exist: line drawing. The
2029 * rest is incompatible history st should not support.
2030 */
2031 return;
2032 case '\032': /* SUB */
2033 case '\030': /* CAN */
2034 csireset();
2035 return;
2036 case '\005': /* ENQ (IGNORED) */
2037 case '\000': /* NUL (IGNORED) */
2038 case '\021': /* XON (IGNORED) */
2039 case '\023': /* XOFF (IGNORED) */
2040 case 0177: /* DEL (IGNORED) */
2041 return;
2042 }
2043 } else if(term.esc & ESC_START) {
2044 if(term.esc & ESC_CSI) {
2045 csiescseq.buf[csiescseq.len++] = ascii;
2046 if(BETWEEN(ascii, 0x40, 0x7E)
2047 || csiescseq.len >= ESC_BUF_SIZ) {
2048 term.esc = 0;
2049 csiparse(), csihandle();
2050 }
2051 } else if(term.esc & ESC_STR_END) {
2052 term.esc = 0;
2053 if(ascii == '\\')
2054 strhandle();
2055 } else if(term.esc & ESC_ALTCHARSET) {
2056 switch(ascii) {
2057 case '0': /* Line drawing set */
2058 term.c.attr.mode |= ATTR_GFX;
2059 break;
2060 case 'B': /* USASCII */
2061 term.c.attr.mode &= ~ATTR_GFX;
2062 break;
2063 case 'A': /* UK (IGNORED) */
2064 case '<': /* multinational charset (IGNORED) */
2065 case '5': /* Finnish (IGNORED) */
2066 case 'C': /* Finnish (IGNORED) */
2067 case 'K': /* German (IGNORED) */
2068 break;
2069 default:
2070 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2071 }
2072 term.esc = 0;
2073 } else if(term.esc & ESC_TEST) {
2074 if(ascii == '8') { /* DEC screen alignment test. */
2075 char E[UTF_SIZ] = "E";
2076 int x, y;
2077
2078 for(x = 0; x < term.col; ++x) {
2079 for(y = 0; y < term.row; ++y)
2080 tsetchar(E, &term.c.attr, x, y);
2081 }
2082 }
2083 term.esc = 0;
2084 } else {
2085 switch(ascii) {
2086 case '[':
2087 term.esc |= ESC_CSI;
2088 break;
2089 case '#':
2090 term.esc |= ESC_TEST;
2091 break;
2092 case 'P': /* DCS -- Device Control String */
2093 case '_': /* APC -- Application Program Command */
2094 case '^': /* PM -- Privacy Message */
2095 case ']': /* OSC -- Operating System Command */
2096 case 'k': /* old title set compatibility */
2097 strreset();
2098 strescseq.type = ascii;
2099 term.esc |= ESC_STR;
2100 break;
2101 case '(': /* set primary charset G0 */
2102 term.esc |= ESC_ALTCHARSET;
2103 break;
2104 case ')': /* set secondary charset G1 (IGNORED) */
2105 case '*': /* set tertiary charset G2 (IGNORED) */
2106 case '+': /* set quaternary charset G3 (IGNORED) */
2107 term.esc = 0;
2108 break;
2109 case 'D': /* IND -- Linefeed */
2110 if(term.c.y == term.bot) {
2111 tscrollup(term.top, 1);
2112 } else {
2113 tmoveto(term.c.x, term.c.y+1);
2114 }
2115 term.esc = 0;
2116 break;
2117 case 'E': /* NEL -- Next line */
2118 tnewline(1); /* always go to first col */
2119 term.esc = 0;
2120 break;
2121 case 'H': /* HTS -- Horizontal tab stop */
2122 term.tabs[term.c.x] = 1;
2123 term.esc = 0;
2124 break;
2125 case 'M': /* RI -- Reverse index */
2126 if(term.c.y == term.top) {
2127 tscrolldown(term.top, 1);
2128 } else {
2129 tmoveto(term.c.x, term.c.y-1);
2130 }
2131 term.esc = 0;
2132 break;
2133 case 'Z': /* DECID -- Identify Terminal */
2134 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2135 term.esc = 0;
2136 break;
2137 case 'c': /* RIS -- Reset to inital state */
2138 treset();
2139 term.esc = 0;
2140 xresettitle();
2141 break;
2142 case '=': /* DECPAM -- Application keypad */
2143 term.mode |= MODE_APPKEYPAD;
2144 term.esc = 0;
2145 break;
2146 case '>': /* DECPNM -- Normal keypad */
2147 term.mode &= ~MODE_APPKEYPAD;
2148 term.esc = 0;
2149 break;
2150 case '7': /* DECSC -- Save Cursor */
2151 tcursor(CURSOR_SAVE);
2152 term.esc = 0;
2153 break;
2154 case '8': /* DECRC -- Restore Cursor */
2155 tcursor(CURSOR_LOAD);
2156 term.esc = 0;
2157 break;
2158 case '\\': /* ST -- Stop */
2159 term.esc = 0;
2160 break;
2161 default:
2162 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2163 (uchar) ascii, isprint(ascii)? ascii:'.');
2164 term.esc = 0;
2165 }
2166 }
2167 /*
2168 * All characters which form part of a sequence are not
2169 * printed
2170 */
2171 return;
2172 }
2173 /*
2174 * Display control codes only if we are in graphic mode
2175 */
2176 if(control && !(term.c.attr.mode & ATTR_GFX))
2177 return;
2178 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2179 sel.bx = -1;
2180 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2181 tnewline(1); /* always go to first col */
2182
2183 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2184 memmove(&term.line[term.c.y][term.c.x+1],
2185 &term.line[term.c.y][term.c.x],
2186 (term.col - term.c.x - 1) * sizeof(Glyph));
2187 }
2188
2189 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2190 if(term.c.x+1 < term.col) {
2191 tmoveto(term.c.x+1, term.c.y);
2192 } else {
2193 term.c.state |= CURSOR_WRAPNEXT;
2194 }
2195 }
2196
2197 int
2198 tresize(int col, int row) {
2199 int i, x;
2200 int minrow = MIN(row, term.row);
2201 int mincol = MIN(col, term.col);
2202 int slide = term.c.y - row + 1;
2203 bool *bp;
2204
2205 if(col < 1 || row < 1)
2206 return 0;
2207
2208 /* free unneeded rows */
2209 i = 0;
2210 if(slide > 0) {
2211 /*
2212 * slide screen to keep cursor where we expect it -
2213 * tscrollup would work here, but we can optimize to
2214 * memmove because we're freeing the earlier lines
2215 */
2216 for(/* i = 0 */; i < slide; i++) {
2217 free(term.line[i]);
2218 free(term.alt[i]);
2219 }
2220 memmove(term.line, term.line + slide, row * sizeof(Line));
2221 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2222 }
2223 for(i += row; i < term.row; i++) {
2224 free(term.line[i]);
2225 free(term.alt[i]);
2226 }
2227
2228 /* resize to new height */
2229 term.line = xrealloc(term.line, row * sizeof(Line));
2230 term.alt = xrealloc(term.alt, row * sizeof(Line));
2231 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2232 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2233
2234 /* resize each row to new width, zero-pad if needed */
2235 for(i = 0; i < minrow; i++) {
2236 term.dirty[i] = 1;
2237 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2238 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2239 for(x = mincol; x < col; x++) {
2240 term.line[i][x].state = 0;
2241 term.alt[i][x].state = 0;
2242 }
2243 }
2244
2245 /* allocate any new rows */
2246 for(/* i == minrow */; i < row; i++) {
2247 term.dirty[i] = 1;
2248 term.line[i] = xcalloc(col, sizeof(Glyph));
2249 term.alt [i] = xcalloc(col, sizeof(Glyph));
2250 }
2251 if(col > term.col) {
2252 bp = term.tabs + term.col;
2253
2254 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2255 while(--bp > term.tabs && !*bp)
2256 /* nothing */ ;
2257 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2258 *bp = 1;
2259 }
2260 /* update terminal size */
2261 term.col = col;
2262 term.row = row;
2263 /* reset scrolling region */
2264 tsetscroll(0, row-1);
2265 /* make use of the LIMIT in tmoveto */
2266 tmoveto(term.c.x, term.c.y);
2267
2268 return (slide > 0);
2269 }
2270
2271 void
2272 xresize(int col, int row) {
2273 xw.tw = MAX(1, col * xw.cw);
2274 xw.th = MAX(1, row * xw.ch);
2275
2276 if(!usedbe) {
2277 XFreePixmap(xw.dpy, xw.buf);
2278 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2279 DefaultDepth(xw.dpy, xw.scr));
2280 XSetForeground(xw.dpy, dc.gc, 0);
2281 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2282 }
2283
2284 XftDrawChange(xw.draw, xw.buf);
2285 }
2286
2287 void
2288 xloadcols(void) {
2289 int i, r, g, b;
2290 XRenderColor color = { .alpha = 0 };
2291
2292 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2293 for(i = 0; i < LEN(colorname); i++) {
2294 if(!colorname[i])
2295 continue;
2296 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2297 die("Could not allocate color '%s'\n", colorname[i]);
2298 }
2299 }
2300
2301 /* load colors [16-255] ; same colors as xterm */
2302 for(i = 16, r = 0; r < 6; r++) {
2303 for(g = 0; g < 6; g++) {
2304 for(b = 0; b < 6; b++) {
2305 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
2306 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
2307 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
2308 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2309 die("Could not allocate color %d\n", i);
2310 }
2311 i++;
2312 }
2313 }
2314 }
2315
2316 for(r = 0; r < 24; r++, i++) {
2317 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2318 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2319 &dc.col[i])) {
2320 die("Could not allocate color %d\n", i);
2321 }
2322 }
2323 }
2324
2325 void
2326 xtermclear(int col1, int row1, int col2, int row2) {
2327 XftDrawRect(xw.draw,
2328 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2329 borderpx + col1 * xw.cw,
2330 borderpx + row1 * xw.ch,
2331 (col2-col1+1) * xw.cw,
2332 (row2-row1+1) * xw.ch);
2333 }
2334
2335 /*
2336 * Absolute coordinates.
2337 */
2338 void
2339 xclear(int x1, int y1, int x2, int y2) {
2340 XftDrawRect(xw.draw,
2341 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2342 x1, y1, x2-x1, y2-y1);
2343 }
2344
2345 void
2346 xhints(void) {
2347 XClassHint class = {opt_class ? opt_class : termname, termname};
2348 XWMHints wm = {.flags = InputHint, .input = 1};
2349 XSizeHints *sizeh = NULL;
2350
2351 sizeh = XAllocSizeHints();
2352 if(xw.isfixed == False) {
2353 sizeh->flags = PSize | PResizeInc | PBaseSize;
2354 sizeh->height = xw.h;
2355 sizeh->width = xw.w;
2356 sizeh->height_inc = xw.ch;
2357 sizeh->width_inc = xw.cw;
2358 sizeh->base_height = 2 * borderpx;
2359 sizeh->base_width = 2 * borderpx;
2360 } else {
2361 sizeh->flags = PMaxSize | PMinSize;
2362 sizeh->min_width = sizeh->max_width = xw.fw;
2363 sizeh->min_height = sizeh->max_height = xw.fh;
2364 }
2365
2366 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2367 XFree(sizeh);
2368 }
2369
2370 int
2371 xloadfont(Font *f, FcPattern *pattern) {
2372 FcPattern *match;
2373 FcResult result;
2374
2375 match = FcFontMatch(NULL, pattern, &result);
2376 if(!match)
2377 return 1;
2378
2379 if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
2380 FcPatternDestroy(match);
2381 return 1;
2382 }
2383
2384 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2385 FcPatternDestroy(match);
2386 return 1;
2387 }
2388
2389 f->pattern = FcPatternDuplicate(pattern);
2390
2391 f->ascent = f->match->ascent;
2392 f->descent = f->match->descent;
2393 f->lbearing = 0;
2394 f->rbearing = f->match->max_advance_width;
2395
2396 f->height = f->match->height;
2397 f->width = f->lbearing + f->rbearing;
2398
2399 return 0;
2400 }
2401
2402 void
2403 xloadfonts(char *fontstr, int fontsize) {
2404 FcPattern *pattern;
2405 FcResult result;
2406 double fontval;
2407
2408 if(fontstr[0] == '-') {
2409 pattern = XftXlfdParse(fontstr, False, False);
2410 } else {
2411 pattern = FcNameParse((FcChar8 *)fontstr);
2412 }
2413
2414 if(!pattern)
2415 die("st: can't open font %s\n", fontstr);
2416
2417 if(fontsize > 0) {
2418 FcPatternDel(pattern, FC_PIXEL_SIZE);
2419 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2420 usedfontsize = fontsize;
2421 } else {
2422 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2423 if(result == FcResultMatch) {
2424 usedfontsize = (int)fontval;
2425 } else {
2426 /*
2427 * Default font size is 12, if none given. This is to
2428 * have a known usedfontsize value.
2429 */
2430 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2431 usedfontsize = 12;
2432 }
2433 }
2434
2435 FcConfigSubstitute(0, pattern, FcMatchPattern);
2436 FcDefaultSubstitute(pattern);
2437
2438 if(xloadfont(&dc.font, pattern))
2439 die("st: can't open font %s\n", fontstr);
2440
2441 /* Setting character width and height. */
2442 xw.cw = dc.font.width;
2443 xw.ch = dc.font.height;
2444
2445 FcPatternDel(pattern, FC_WEIGHT);
2446 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2447 if(xloadfont(&dc.bfont, pattern))
2448 die("st: can't open font %s\n", fontstr);
2449
2450 FcPatternDel(pattern, FC_SLANT);
2451 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2452 if(xloadfont(&dc.ibfont, pattern))
2453 die("st: can't open font %s\n", fontstr);
2454
2455 FcPatternDel(pattern, FC_WEIGHT);
2456 if(xloadfont(&dc.ifont, pattern))
2457 die("st: can't open font %s\n", fontstr);
2458
2459 FcPatternDestroy(pattern);
2460 }
2461
2462 void
2463 xunloadfonts(void) {
2464 int i, ip;
2465
2466 /*
2467 * Free the loaded fonts in the font cache. This is done backwards
2468 * from the frccur.
2469 */
2470 for (i = 0, ip = frccur; i < frclen; i++, ip--) {
2471 if (ip < 0)
2472 ip = LEN(frc) - 1;
2473 XftFontClose(xw.dpy, frc[ip].font);
2474 }
2475 frccur = -1;
2476 frclen = 0;
2477
2478 XftFontClose(xw.dpy, dc.font.match);
2479 FcPatternDestroy(dc.font.pattern);
2480 FcFontSetDestroy(dc.font.set);
2481 XftFontClose(xw.dpy, dc.bfont.match);
2482 FcPatternDestroy(dc.bfont.pattern);
2483 FcFontSetDestroy(dc.bfont.set);
2484 XftFontClose(xw.dpy, dc.ifont.match);
2485 FcPatternDestroy(dc.ifont.pattern);
2486 FcFontSetDestroy(dc.ifont.set);
2487 XftFontClose(xw.dpy, dc.ibfont.match);
2488 FcPatternDestroy(dc.ibfont.pattern);
2489 FcFontSetDestroy(dc.ibfont.set);
2490 }
2491
2492 void
2493 xzoom(const Arg *arg) {
2494 xunloadfonts();
2495 xloadfonts(usedfont, usedfontsize + arg->i);
2496 cresize(0, 0);
2497 redraw(0);
2498 }
2499
2500 void
2501 xinit(void) {
2502 XSetWindowAttributes attrs;
2503 XGCValues gcvalues;
2504 Cursor cursor;
2505 Window parent;
2506 int sw, sh, major, minor;
2507
2508 if(!(xw.dpy = XOpenDisplay(NULL)))
2509 die("Can't open display\n");
2510 xw.scr = XDefaultScreen(xw.dpy);
2511 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2512
2513 /* font */
2514 if (!FcInit())
2515 die("Could not init fontconfig.\n");
2516
2517 usedfont = (opt_font == NULL)? font : opt_font;
2518 xloadfonts(usedfont, 0);
2519
2520 /* colors */
2521 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2522 xloadcols();
2523
2524 /* adjust fixed window geometry */
2525 if(xw.isfixed) {
2526 sw = DisplayWidth(xw.dpy, xw.scr);
2527 sh = DisplayHeight(xw.dpy, xw.scr);
2528 if(xw.fx < 0)
2529 xw.fx = sw + xw.fx - xw.fw - 1;
2530 if(xw.fy < 0)
2531 xw.fy = sh + xw.fy - xw.fh - 1;
2532
2533 xw.h = xw.fh;
2534 xw.w = xw.fw;
2535 } else {
2536 /* window - default size */
2537 xw.h = 2 * borderpx + term.row * xw.ch;
2538 xw.w = 2 * borderpx + term.col * xw.cw;
2539 xw.fx = 0;
2540 xw.fy = 0;
2541 }
2542
2543 /* Events */
2544 attrs.background_pixel = dc.col[defaultbg].pixel;
2545 attrs.border_pixel = dc.col[defaultbg].pixel;
2546 attrs.bit_gravity = NorthWestGravity;
2547 attrs.event_mask = FocusChangeMask | KeyPressMask
2548 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2549 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2550 attrs.colormap = xw.cmap;
2551
2552 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2553 XRootWindow(xw.dpy, xw.scr);
2554 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2555 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2556 xw.vis,
2557 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2558 | CWColormap,
2559 &attrs);
2560
2561 /* double buffering */
2562 /*
2563 if(XdbeQueryExtension(xw.dpy, &major, &minor)) {
2564 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win,
2565 XdbeBackground);
2566 usedbe = True;
2567 } else {
2568 */
2569 memset(&gcvalues, 0, sizeof(gcvalues));
2570 gcvalues.graphics_exposures = False;
2571 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2572 &gcvalues);
2573 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2574 DefaultDepth(xw.dpy, xw.scr));
2575 XSetForeground(xw.dpy, dc.gc, 0);
2576 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2577 //xw.buf = xw.win;
2578 /*
2579 }
2580 */
2581
2582 /* Xft rendering context */
2583 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2584
2585 /* input methods */
2586 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2587 XSetLocaleModifiers("@im=local");
2588 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2589 XSetLocaleModifiers("@im=");
2590 if((xw.xim = XOpenIM(xw.dpy,
2591 NULL, NULL, NULL)) == NULL) {
2592 die("XOpenIM failed. Could not open input"
2593 " device.\n");
2594 }
2595 }
2596 }
2597 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2598 | XIMStatusNothing, XNClientWindow, xw.win,
2599 XNFocusWindow, xw.win, NULL);
2600 if(xw.xic == NULL)
2601 die("XCreateIC failed. Could not obtain input method.\n");
2602
2603 /* white cursor, black outline */
2604 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2605 XDefineCursor(xw.dpy, xw.win, cursor);
2606 XRecolorCursor(xw.dpy, cursor,
2607 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2608 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2609
2610 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2611 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2612 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2613
2614 xresettitle();
2615 XMapWindow(xw.dpy, xw.win);
2616 xhints();
2617 XSync(xw.dpy, 0);
2618 }
2619
2620 void
2621 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2622 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2623 width = charlen * xw.cw, xp, i;
2624 int frp, frcflags;
2625 int u8fl, u8fblen, u8cblen, doesexist;
2626 char *u8c, *u8fs;
2627 long u8char;
2628 Font *font = &dc.font;
2629 FcResult fcres;
2630 FcPattern *fcpattern, *fontpattern;
2631 FcFontSet *fcsets[] = { NULL };
2632 FcCharSet *fccharset;
2633 Colour *fg = &dc.col[base.fg], *bg = &dc.col[base.bg],
2634 *temp, revfg, revbg;
2635 XRenderColor colfg, colbg;
2636
2637 frcflags = FRC_NORMAL;
2638
2639 if(base.mode & ATTR_BOLD) {
2640 if(BETWEEN(base.fg, 0, 7)) {
2641 /* basic system colors */
2642 fg = &dc.col[base.fg + 8];
2643 } else if(BETWEEN(base.fg, 16, 195)) {
2644 /* 256 colors */
2645 fg = &dc.col[base.fg + 36];
2646 } else if(BETWEEN(base.fg, 232, 251)) {
2647 /* greyscale */
2648 fg = &dc.col[base.fg + 4];
2649 }
2650 /*
2651 * Those ranges will not be brightened:
2652 * 8 - 15 – bright system colors
2653 * 196 - 231 – highest 256 color cube
2654 * 252 - 255 – brightest colors in greyscale
2655 */
2656 font = &dc.bfont;
2657 frcflags = FRC_BOLD;
2658 }
2659
2660 if(base.mode & ATTR_ITALIC) {
2661 font = &dc.ifont;
2662 frcflags = FRC_ITALIC;
2663 }
2664 if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2665 font = &dc.ibfont;
2666 frcflags = FRC_ITALICBOLD;
2667 }
2668
2669 if(IS_SET(MODE_REVERSE)) {
2670 if(fg == &dc.col[defaultfg]) {
2671 fg = &dc.col[defaultbg];
2672 } else {
2673 colfg.red = ~fg->color.red;
2674 colfg.green = ~fg->color.green;
2675 colfg.blue = ~fg->color.blue;
2676 colfg.alpha = fg->color.alpha;
2677 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2678 fg = &revfg;
2679 }
2680
2681 if(bg == &dc.col[defaultbg]) {
2682 bg = &dc.col[defaultfg];
2683 } else {
2684 colbg.red = ~bg->color.red;
2685 colbg.green = ~bg->color.green;
2686 colbg.blue = ~bg->color.blue;
2687 colbg.alpha = bg->color.alpha;
2688 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2689 bg = &revbg;
2690 }
2691 }
2692
2693 if(base.mode & ATTR_REVERSE) {
2694 temp = fg;
2695 fg = bg;
2696 bg = temp;
2697 }
2698
2699 /* Intelligent cleaning up of the borders. */
2700 if(x == 0) {
2701 xclear(0, (y == 0)? 0 : winy, borderpx,
2702 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2703 }
2704 if(x + charlen >= term.col) {
2705 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2706 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2707 }
2708 if(y == 0)
2709 xclear(winx, 0, winx + width, borderpx);
2710 if(y == term.row-1)
2711 xclear(winx, winy + xw.ch, winx + width, xw.h);
2712
2713 /* Clean up the region we want to draw to. */
2714 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2715
2716 fcsets[0] = font->set;
2717 for (xp = winx; bytelen > 0;) {
2718 /*
2719 * Search for the range in the to be printed string of glyphs
2720 * that are in the main font. Then print that range. If
2721 * some glyph is found that is not in the font, do the
2722 * fallback dance.
2723 */
2724 u8fs = s;
2725 u8fblen = 0;
2726 u8fl = 0;
2727 for (;;) {
2728 u8c = s;
2729 u8cblen = utf8decode(s, &u8char);
2730 s += u8cblen;
2731 bytelen -= u8cblen;
2732
2733 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
2734 if (!doesexist || bytelen <= 0) {
2735 if (bytelen <= 0) {
2736 if (doesexist) {
2737 u8fl++;
2738 u8fblen += u8cblen;
2739 }
2740 }
2741
2742 if (u8fl > 0) {
2743 XftDrawStringUtf8(xw.draw, fg,
2744 font->match, xp,
2745 winy + font->ascent,
2746 (FcChar8 *)u8fs,
2747 u8fblen);
2748 xp += font->width * u8fl;
2749 }
2750 break;
2751 }
2752
2753 u8fl++;
2754 u8fblen += u8cblen;
2755 }
2756 if (doesexist)
2757 break;
2758
2759 frp = frccur;
2760 /* Search the font cache. */
2761 for (i = 0; i < frclen; i++, frp--) {
2762 if (frp <= 0)
2763 frp = LEN(frc) - 1;
2764
2765 if (frc[frp].c == u8char
2766 && frc[frp].flags == frcflags) {
2767 break;
2768 }
2769 }
2770
2771 /* Nothing was found. */
2772 if (i >= frclen) {
2773 /*
2774 * Nothing was found in the cache. Now use
2775 * some dozen of Fontconfig calls to get the
2776 * font for one single character.
2777 */
2778 fcpattern = FcPatternDuplicate(font->pattern);
2779 fccharset = FcCharSetCreate();
2780
2781 FcCharSetAddChar(fccharset, u8char);
2782 FcPatternAddCharSet(fcpattern, FC_CHARSET,
2783 fccharset);
2784 FcPatternAddBool(fcpattern, FC_SCALABLE,
2785 FcTrue);
2786
2787 FcConfigSubstitute(0, fcpattern,
2788 FcMatchPattern);
2789 FcDefaultSubstitute(fcpattern);
2790
2791 fontpattern = FcFontSetMatch(0, fcsets,
2792 FcTrue, fcpattern, &fcres);
2793
2794 /*
2795 * Overwrite or create the new cache entry
2796 * entry.
2797 */
2798 frccur++;
2799 frclen++;
2800 if (frccur >= LEN(frc))
2801 frccur = 0;
2802 if (frclen > LEN(frc)) {
2803 frclen = LEN(frc);
2804 XftFontClose(xw.dpy, frc[frccur].font);
2805 }
2806
2807 frc[frccur].font = XftFontOpenPattern(xw.dpy,
2808 fontpattern);
2809 frc[frccur].c = u8char;
2810 frc[frccur].flags = frcflags;
2811
2812 FcPatternDestroy(fcpattern);
2813 FcCharSetDestroy(fccharset);
2814
2815 frp = frccur;
2816 }
2817
2818 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
2819 xp, winy + frc[frp].font->ascent,
2820 (FcChar8 *)u8c, u8cblen);
2821
2822 xp += font->width;
2823 }
2824
2825 /*
2826 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
2827 winy + font->ascent, (FcChar8 *)s, bytelen);
2828 */
2829
2830 if(base.mode & ATTR_UNDERLINE) {
2831 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
2832 width, 1);
2833 }
2834 }
2835
2836 void
2837 xdrawcursor(void) {
2838 static int oldx = 0, oldy = 0;
2839 int sl;
2840 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs, 0};
2841
2842 LIMIT(oldx, 0, term.col-1);
2843 LIMIT(oldy, 0, term.row-1);
2844
2845 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2846 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2847
2848 /* remove the old cursor */
2849 if(term.line[oldy][oldx].state & GLYPH_SET) {
2850 sl = utf8size(term.line[oldy][oldx].c);
2851 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2852 oldy, 1, sl);
2853 } else {
2854 xtermclear(oldx, oldy, oldx, oldy);
2855 }
2856
2857 /* draw the new one */
2858 if(!(IS_SET(MODE_HIDE))) {
2859 if(!(xw.state & WIN_FOCUSED))
2860 g.bg = defaultucs;
2861
2862 if(IS_SET(MODE_REVERSE))
2863 g.mode |= ATTR_REVERSE, g.fg = defaultcs, g.bg = defaultfg;
2864
2865 sl = utf8size(g.c);
2866 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2867 oldx = term.c.x, oldy = term.c.y;
2868 }
2869 }
2870
2871 void
2872 xresettitle(void) {
2873 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
2874 }
2875
2876 void
2877 redraw(int timeout) {
2878 struct timespec tv = {0, timeout * 1000};
2879
2880 tfulldirt();
2881 draw();
2882
2883 if(timeout > 0) {
2884 nanosleep(&tv, NULL);
2885 XSync(xw.dpy, False); /* necessary for a good tput flash */
2886 }
2887 }
2888
2889 void
2890 draw(void) {
2891 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2892
2893 drawregion(0, 0, term.col, term.row);
2894 if(usedbe) {
2895 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2896 } else {
2897 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
2898 xw.h, 0, 0);
2899 XSetForeground(xw.dpy, dc.gc, 0);
2900 }
2901 }
2902
2903 void
2904 drawregion(int x1, int y1, int x2, int y2) {
2905 int ic, ib, x, y, ox, sl;
2906 Glyph base, new;
2907 char buf[DRAW_BUF_SIZ];
2908 bool ena_sel = sel.bx != -1;
2909
2910 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
2911 ena_sel = 0;
2912
2913 if(!(xw.state & WIN_VISIBLE))
2914 return;
2915
2916 for(y = y1; y < y2; y++) {
2917 if(!term.dirty[y])
2918 continue;
2919
2920 xtermclear(0, y, term.col, y);
2921 term.dirty[y] = 0;
2922 base = term.line[y][0];
2923 ic = ib = ox = 0;
2924 for(x = x1; x < x2; x++) {
2925 new = term.line[y][x];
2926 if(ena_sel && *(new.c) && selected(x, y))
2927 new.mode ^= ATTR_REVERSE;
2928 if(ib > 0 && (!(new.state & GLYPH_SET)
2929 || ATTRCMP(base, new)
2930 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2931 xdraws(buf, base, ox, y, ic, ib);
2932 ic = ib = 0;
2933 }
2934 if(new.state & GLYPH_SET) {
2935 if(ib == 0) {
2936 ox = x;
2937 base = new;
2938 }
2939
2940 sl = utf8size(new.c);
2941 memcpy(buf+ib, new.c, sl);
2942 ib += sl;
2943 ++ic;
2944 }
2945 }
2946 if(ib > 0)
2947 xdraws(buf, base, ox, y, ic, ib);
2948 }
2949 xdrawcursor();
2950 }
2951
2952 void
2953 expose(XEvent *ev) {
2954 XExposeEvent *e = &ev->xexpose;
2955
2956 if(xw.state & WIN_REDRAW) {
2957 if(!e->count)
2958 xw.state &= ~WIN_REDRAW;
2959 }
2960 redraw(0);
2961 }
2962
2963 void
2964 visibility(XEvent *ev) {
2965 XVisibilityEvent *e = &ev->xvisibility;
2966
2967 if(e->state == VisibilityFullyObscured) {
2968 xw.state &= ~WIN_VISIBLE;
2969 } else if(!(xw.state & WIN_VISIBLE)) {
2970 /* need a full redraw for next Expose, not just a buf copy */
2971 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2972 }
2973 }
2974
2975 void
2976 unmap(XEvent *ev) {
2977 xw.state &= ~WIN_VISIBLE;
2978 }
2979
2980 void
2981 xseturgency(int add) {
2982 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2983
2984 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2985 XSetWMHints(xw.dpy, xw.win, h);
2986 XFree(h);
2987 }
2988
2989 void
2990 focus(XEvent *ev) {
2991 if(ev->type == FocusIn) {
2992 XSetICFocus(xw.xic);
2993 xw.state |= WIN_FOCUSED;
2994 xseturgency(0);
2995 } else {
2996 XUnsetICFocus(xw.xic);
2997 xw.state &= ~WIN_FOCUSED;
2998 }
2999 }
3000
3001 inline bool
3002 match(uint mask, uint state) {
3003 if(mask == XK_NO_MOD && state)
3004 return false;
3005 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3006 return false;
3007 if((state & mask) != state)
3008 return false;
3009 return true;
3010 }
3011
3012 void
3013 numlock(const Arg *dummy) {
3014 term.numlock ^= 1;
3015 }
3016
3017 char*
3018 kmap(KeySym k, uint state) {
3019 uint mask;
3020 Key *kp;
3021 int i;
3022
3023 /* Check for mapped keys out of X11 function keys. */
3024 for(i = 0; i < LEN(mappedkeys); i++) {
3025 if(mappedkeys[i] == k)
3026 break;
3027 }
3028 if(i == LEN(mappedkeys)) {
3029 if((k & 0xFFFF) < 0xFD00)
3030 return NULL;
3031 }
3032
3033 for(kp = key; kp < key + LEN(key); kp++) {
3034 mask = kp->mask;
3035
3036 if(kp->k != k)
3037 continue;
3038
3039 if(!match(mask, state))
3040 continue;
3041
3042 if(kp->appkey > 0) {
3043 if(!IS_SET(MODE_APPKEYPAD))
3044 continue;
3045 if(term.numlock && kp->appkey == 2)
3046 continue;
3047 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3048 continue;
3049 }
3050
3051 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3052 (kp->appcursor > 0
3053 && !IS_SET(MODE_APPCURSOR))) {
3054 continue;
3055 }
3056
3057 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3058 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3059 continue;
3060 }
3061
3062 return kp->s;
3063 }
3064
3065 return NULL;
3066 }
3067
3068 void
3069 kpress(XEvent *ev) {
3070 XKeyEvent *e = &ev->xkey;
3071 KeySym ksym;
3072 char xstr[31], buf[32], *customkey, *cp = buf;
3073 int len;
3074 Status status;
3075 Shortcut *bp;
3076
3077 if (IS_SET(MODE_KBDLOCK))
3078 return;
3079
3080 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3081 e->state &= ~Mod2Mask;
3082 /* 1. shortcuts */
3083 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3084 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3085 bp->func(&(bp->arg));
3086 return;
3087 }
3088 }
3089
3090 /* 2. custom keys from config.h */
3091 if((customkey = kmap(ksym, e->state))) {
3092 len = strlen(customkey);
3093 memcpy(buf, customkey, len);
3094 /* 2. hardcoded (overrides X lookup) */
3095 } else {
3096 if(len == 0)
3097 return;
3098
3099 if (len == 1 && e->state & Mod1Mask)
3100 *cp++ = '\033';
3101
3102 memcpy(cp, xstr, len);
3103 len = cp - buf + len;
3104 }
3105
3106 ttywrite(buf, len);
3107 if(IS_SET(MODE_ECHO))
3108 techo(buf, len);
3109 }
3110
3111
3112 void
3113 cmessage(XEvent *e) {
3114 /*
3115 * See xembed specs
3116 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3117 */
3118 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3119 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3120 xw.state |= WIN_FOCUSED;
3121 xseturgency(0);
3122 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3123 xw.state &= ~WIN_FOCUSED;
3124 }
3125 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3126 /* Send SIGHUP to shell */
3127 kill(pid, SIGHUP);
3128 exit(EXIT_SUCCESS);
3129 }
3130 }
3131
3132 void
3133 cresize(int width, int height) {
3134 int col, row;
3135
3136 if(width != 0)
3137 xw.w = width;
3138 if(height != 0)
3139 xw.h = height;
3140
3141 col = (xw.w - 2 * borderpx) / xw.cw;
3142 row = (xw.h - 2 * borderpx) / xw.ch;
3143
3144 tresize(col, row);
3145 xresize(col, row);
3146 ttyresize();
3147 }
3148
3149 void
3150 resize(XEvent *e) {
3151 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3152 return;
3153
3154 cresize(e->xconfigure.width, e->xconfigure.height);
3155 }
3156
3157 void
3158 run(void) {
3159 XEvent ev;
3160 fd_set rfd;
3161 int xfd = XConnectionNumber(xw.dpy), i;
3162 struct timeval drawtimeout, *tv = NULL;
3163
3164 for(i = 0;; i++) {
3165 FD_ZERO(&rfd);
3166 FD_SET(cmdfd, &rfd);
3167 FD_SET(xfd, &rfd);
3168 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3169 if(errno == EINTR)
3170 continue;
3171 die("select failed: %s\n", SERRNO);
3172 }
3173
3174 /*
3175 * Stop after a certain number of reads so the user does not
3176 * feel like the system is stuttering.
3177 */
3178 if(i < 1000 && FD_ISSET(cmdfd, &rfd)) {
3179 ttyread();
3180
3181 /*
3182 * Just wait a bit so it isn't disturbing the
3183 * user and the system is able to write something.
3184 */
3185 drawtimeout.tv_sec = 0;
3186 drawtimeout.tv_usec = 5;
3187 tv = &drawtimeout;
3188 continue;
3189 }
3190 i = 0;
3191 tv = NULL;
3192
3193 while(XPending(xw.dpy)) {
3194 XNextEvent(xw.dpy, &ev);
3195 if(XFilterEvent(&ev, None))
3196 continue;
3197 if(handler[ev.type])
3198 (handler[ev.type])(&ev);
3199 }
3200
3201 draw();
3202 XFlush(xw.dpy);
3203 }
3204 }
3205
3206 int
3207 main(int argc, char *argv[]) {
3208 int i, bitm, xr, yr;
3209 uint wr, hr;
3210
3211 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3212 xw.isfixed = False;
3213
3214 for(i = 1; i < argc; i++) {
3215 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
3216 case 'c':
3217 if(++i < argc)
3218 opt_class = argv[i];
3219 break;
3220 case 'e':
3221 /* eat all remaining arguments */
3222 if(++i < argc)
3223 opt_cmd = &argv[i];
3224 goto run;
3225 case 'f':
3226 if(++i < argc)
3227 opt_font = argv[i];
3228 break;
3229 case 'g':
3230 if(++i >= argc)
3231 break;
3232
3233 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
3234 if(bitm & XValue)
3235 xw.fx = xr;
3236 if(bitm & YValue)
3237 xw.fy = yr;
3238 if(bitm & WidthValue)
3239 xw.fw = (int)wr;
3240 if(bitm & HeightValue)
3241 xw.fh = (int)hr;
3242 if(bitm & XNegative && xw.fx == 0)
3243 xw.fx = -1;
3244 if(bitm & XNegative && xw.fy == 0)
3245 xw.fy = -1;
3246
3247 if(xw.fh != 0 && xw.fw != 0)
3248 xw.isfixed = True;
3249 break;
3250 case 'o':
3251 if(++i < argc)
3252 opt_io = argv[i];
3253 break;
3254 case 't':
3255 if(++i < argc)
3256 opt_title = argv[i];
3257 break;
3258 case 'v':
3259 default:
3260 die(USAGE);
3261 case 'w':
3262 if(++i < argc)
3263 opt_embed = argv[i];
3264 break;
3265 }
3266 }
3267
3268 run:
3269 setlocale(LC_CTYPE, "");
3270 XSetLocaleModifiers("");
3271 tnew(80, 24);
3272 xinit();
3273 ttynew();
3274 selinit();
3275 run();
3276
3277 return 0;
3278 }
3279