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7befdc0c05beb481eb2c0e48b312b2449563868f
[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 #define XK_SWITCH_MOD (1<<13)
65
66 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
67
68 /* macros */
69 #define SERRNO strerror(errno)
70 #define MIN(a, b) ((a) < (b) ? (a) : (b))
71 #define MAX(a, b) ((a) < (b) ? (b) : (a))
72 #define LEN(a) (sizeof(a) / sizeof(a[0]))
73 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
74 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
75 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
76 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
77 #define IS_SET(flag) ((term.mode & (flag)) != 0)
78 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
79
80 #define VT102ID "\033[?6c"
81
82 enum glyph_attribute {
83 ATTR_NULL = 0,
84 ATTR_REVERSE = 1,
85 ATTR_UNDERLINE = 2,
86 ATTR_BOLD = 4,
87 ATTR_GFX = 8,
88 ATTR_ITALIC = 16,
89 ATTR_BLINK = 32,
90 };
91
92 enum cursor_movement {
93 CURSOR_SAVE,
94 CURSOR_LOAD
95 };
96
97 enum cursor_state {
98 CURSOR_DEFAULT = 0,
99 CURSOR_WRAPNEXT = 1,
100 CURSOR_ORIGIN = 2
101 };
102
103 enum glyph_state {
104 GLYPH_SET = 1,
105 GLYPH_DIRTY = 2
106 };
107
108 enum term_mode {
109 MODE_WRAP = 1,
110 MODE_INSERT = 2,
111 MODE_APPKEYPAD = 4,
112 MODE_ALTSCREEN = 8,
113 MODE_CRLF = 16,
114 MODE_MOUSEBTN = 32,
115 MODE_MOUSEMOTION = 64,
116 MODE_MOUSE = 32|64,
117 MODE_REVERSE = 128,
118 MODE_KBDLOCK = 256,
119 MODE_HIDE = 512,
120 MODE_ECHO = 1024,
121 MODE_APPCURSOR = 2048,
122 MODE_MOUSESGR = 4096,
123 };
124
125 enum escape_state {
126 ESC_START = 1,
127 ESC_CSI = 2,
128 ESC_STR = 4, /* DSC, OSC, PM, APC */
129 ESC_ALTCHARSET = 8,
130 ESC_STR_END = 16, /* a final string was encountered */
131 ESC_TEST = 32, /* Enter in test mode */
132 };
133
134 enum window_state {
135 WIN_VISIBLE = 1,
136 WIN_REDRAW = 2,
137 WIN_FOCUSED = 4
138 };
139
140 /* bit macro */
141 #undef B0
142 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
143
144 typedef unsigned char uchar;
145 typedef unsigned int uint;
146 typedef unsigned long ulong;
147 typedef unsigned short ushort;
148
149 typedef struct {
150 char c[UTF_SIZ]; /* character code */
151 uchar mode; /* attribute flags */
152 ushort fg; /* foreground */
153 ushort bg; /* background */
154 uchar state; /* state flags */
155 } Glyph;
156
157 typedef Glyph *Line;
158
159 typedef struct {
160 Glyph attr; /* current char attributes */
161 int x;
162 int y;
163 char state;
164 } TCursor;
165
166 /* CSI Escape sequence structs */
167 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
168 typedef struct {
169 char buf[ESC_BUF_SIZ]; /* raw string */
170 int len; /* raw string length */
171 char priv;
172 int arg[ESC_ARG_SIZ];
173 int narg; /* nb of args */
174 char mode;
175 } CSIEscape;
176
177 /* STR Escape sequence structs */
178 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
179 typedef struct {
180 char type; /* ESC type ... */
181 char buf[STR_BUF_SIZ]; /* raw string */
182 int len; /* raw string length */
183 char *args[STR_ARG_SIZ];
184 int narg; /* nb of args */
185 } STREscape;
186
187 /* Internal representation of the screen */
188 typedef struct {
189 int row; /* nb row */
190 int col; /* nb col */
191 Line *line; /* screen */
192 Line *alt; /* alternate screen */
193 bool *dirty; /* dirtyness of lines */
194 TCursor c; /* cursor */
195 int top; /* top scroll limit */
196 int bot; /* bottom scroll limit */
197 int mode; /* terminal mode flags */
198 int esc; /* escape state flags */
199 bool numlock; /* lock numbers in keyboard */
200 bool *tabs;
201 } Term;
202
203 /* Purely graphic info */
204 typedef struct {
205 Display *dpy;
206 Colourmap cmap;
207 Window win;
208 Drawable buf;
209 Atom xembed, wmdeletewin;
210 XIM xim;
211 XIC xic;
212 Draw draw;
213 Visual *vis;
214 int scr;
215 bool isfixed; /* is fixed geometry? */
216 int fx, fy, fw, fh; /* fixed geometry */
217 int tw, th; /* tty width and height */
218 int w, h; /* window width and height */
219 int ch; /* char height */
220 int cw; /* char width */
221 char state; /* focus, redraw, visible */
222 } XWindow;
223
224 typedef struct {
225 KeySym k;
226 uint mask;
227 char s[ESC_BUF_SIZ];
228 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
229 signed char appkey; /* application keypad */
230 signed char appcursor; /* application cursor */
231 signed char crlf; /* crlf mode */
232 } Key;
233
234 /* TODO: use better name for vars... */
235 typedef struct {
236 int mode;
237 int bx, by;
238 int ex, ey;
239 struct {
240 int x, y;
241 } b, e;
242 char *clip;
243 Atom xtarget;
244 bool alt;
245 struct timeval tclick1;
246 struct timeval tclick2;
247 } Selection;
248
249 typedef union {
250 int i;
251 unsigned int ui;
252 float f;
253 const void *v;
254 } Arg;
255
256 typedef struct {
257 unsigned int mod;
258 KeySym keysym;
259 void (*func)(const Arg *);
260 const Arg arg;
261 } Shortcut;
262
263 /* function definitions used in config.h */
264 static void xzoom(const Arg *);
265 static void selpaste(const Arg *);
266 static void numlock(const Arg *);
267
268 /* Config.h for applying patches and the configuration. */
269 #include "config.h"
270
271 /* Font structure */
272 typedef struct {
273 int height;
274 int width;
275 int ascent;
276 int descent;
277 short lbearing;
278 short rbearing;
279 XftFont *match;
280 FcFontSet *set;
281 FcPattern *pattern;
282 } Font;
283
284 /* Drawing Context */
285 typedef struct {
286 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
287 Font font, bfont, ifont, ibfont;
288 GC gc;
289 } DC;
290
291 static void die(const char *, ...);
292 static void draw(void);
293 static void redraw(int);
294 static void drawregion(int, int, int, int);
295 static void execsh(void);
296 static void sigchld(int);
297 static void run(void);
298
299 static void csidump(void);
300 static void csihandle(void);
301 static void csiparse(void);
302 static void csireset(void);
303 static void strdump(void);
304 static void strhandle(void);
305 static void strparse(void);
306 static void strreset(void);
307
308 static void tclearregion(int, int, int, int, int);
309 static void tcursor(int);
310 static void tdeletechar(int);
311 static void tdeleteline(int);
312 static void tinsertblank(int);
313 static void tinsertblankline(int);
314 static void tmoveto(int, int);
315 static void tmoveato(int x, int y);
316 static void tnew(int, int);
317 static void tnewline(int);
318 static void tputtab(bool);
319 static void tputc(char *, int);
320 static void treset(void);
321 static int tresize(int, int);
322 static void tscrollup(int, int);
323 static void tscrolldown(int, int);
324 static void tsetattr(int*, int);
325 static void tsetchar(char *, Glyph *, int, int);
326 static void tsetscroll(int, int);
327 static void tswapscreen(void);
328 static void tsetdirt(int, int);
329 static void tsetmode(bool, bool, int *, int);
330 static void tfulldirt(void);
331 static void techo(char *, int);
332
333 static inline bool match(uint, uint);
334 static void ttynew(void);
335 static void ttyread(void);
336 static void ttyresize(void);
337 static void ttywrite(const char *, size_t);
338
339 static void xdraws(char *, Glyph, int, int, int, int);
340 static void xhints(void);
341 static void xclear(int, int, int, int);
342 static void xdrawcursor(void);
343 static void xinit(void);
344 static void xloadcols(void);
345 static int xloadfont(Font *, FcPattern *);
346 static void xloadfonts(char *, int);
347 static void xresettitle(void);
348 static void xseturgency(int);
349 static void xsetsel(char*);
350 static void xtermclear(int, int, int, int);
351 static void xunloadfonts(void);
352 static void xresize(int, int);
353
354 static void expose(XEvent *);
355 static void visibility(XEvent *);
356 static void unmap(XEvent *);
357 static char *kmap(KeySym, uint);
358 static void kpress(XEvent *);
359 static void cmessage(XEvent *);
360 static void cresize(int, int);
361 static void resize(XEvent *);
362 static void focus(XEvent *);
363 static void brelease(XEvent *);
364 static void bpress(XEvent *);
365 static void bmotion(XEvent *);
366 static void selnotify(XEvent *);
367 static void selclear(XEvent *);
368 static void selrequest(XEvent *);
369
370 static void selinit(void);
371 static inline bool selected(int, int);
372 static void selcopy(void);
373 static void selscroll(int, int);
374
375 static int utf8decode(char *, long *);
376 static int utf8encode(long *, char *);
377 static int utf8size(char *);
378 static int isfullutf8(char *, int);
379
380 static ssize_t xwrite(int, char *, size_t);
381 static void *xmalloc(size_t);
382 static void *xrealloc(void *, size_t);
383 static void *xcalloc(size_t, size_t);
384
385 static void (*handler[LASTEvent])(XEvent *) = {
386 [KeyPress] = kpress,
387 [ClientMessage] = cmessage,
388 [ConfigureNotify] = resize,
389 [VisibilityNotify] = visibility,
390 [UnmapNotify] = unmap,
391 [Expose] = expose,
392 [FocusIn] = focus,
393 [FocusOut] = focus,
394 [MotionNotify] = bmotion,
395 [ButtonPress] = bpress,
396 [ButtonRelease] = brelease,
397 [SelectionClear] = selclear,
398 [SelectionNotify] = selnotify,
399 [SelectionRequest] = selrequest,
400 };
401
402 /* Globals */
403 static DC dc;
404 static XWindow xw;
405 static Term term;
406 static CSIEscape csiescseq;
407 static STREscape strescseq;
408 static int cmdfd;
409 static pid_t pid;
410 static Selection sel;
411 static int iofd = -1;
412 static char **opt_cmd = NULL;
413 static char *opt_io = NULL;
414 static char *opt_title = NULL;
415 static char *opt_embed = NULL;
416 static char *opt_class = NULL;
417 static char *opt_font = NULL;
418
419 bool usedbe = False;
420
421 static char *usedfont = NULL;
422 static int usedfontsize = 0;
423
424 /* Font Ring Cache */
425 enum {
426 FRC_NORMAL,
427 FRC_ITALIC,
428 FRC_BOLD,
429 FRC_ITALICBOLD
430 };
431
432 typedef struct {
433 XftFont *font;
434 long c;
435 int flags;
436 } Fontcache;
437
438 /*
439 * Fontcache is a ring buffer, with frccur as current position and frclen as
440 * the current length of used elements.
441 */
442
443 static Fontcache frc[1024];
444 static int frccur = -1, frclen = 0;
445
446 ssize_t
447 xwrite(int fd, char *s, size_t len) {
448 size_t aux = len;
449
450 while(len > 0) {
451 ssize_t r = write(fd, s, len);
452 if(r < 0)
453 return r;
454 len -= r;
455 s += r;
456 }
457 return aux;
458 }
459
460 void *
461 xmalloc(size_t len) {
462 void *p = malloc(len);
463
464 if(!p)
465 die("Out of memory\n");
466
467 return p;
468 }
469
470 void *
471 xrealloc(void *p, size_t len) {
472 if((p = realloc(p, len)) == NULL)
473 die("Out of memory\n");
474
475 return p;
476 }
477
478 void *
479 xcalloc(size_t nmemb, size_t size) {
480 void *p = calloc(nmemb, size);
481
482 if(!p)
483 die("Out of memory\n");
484
485 return p;
486 }
487
488 int
489 utf8decode(char *s, long *u) {
490 uchar c;
491 int i, n, rtn;
492
493 rtn = 1;
494 c = *s;
495 if(~c & B7) { /* 0xxxxxxx */
496 *u = c;
497 return rtn;
498 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
499 *u = c&(B4|B3|B2|B1|B0);
500 n = 1;
501 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
502 *u = c&(B3|B2|B1|B0);
503 n = 2;
504 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
505 *u = c & (B2|B1|B0);
506 n = 3;
507 } else {
508 goto invalid;
509 }
510
511 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
512 c = *s;
513 if((c & (B7|B6)) != B7) /* 10xxxxxx */
514 goto invalid;
515 *u <<= 6;
516 *u |= c & (B5|B4|B3|B2|B1|B0);
517 }
518
519 if((n == 1 && *u < 0x80) ||
520 (n == 2 && *u < 0x800) ||
521 (n == 3 && *u < 0x10000) ||
522 (*u >= 0xD800 && *u <= 0xDFFF)) {
523 goto invalid;
524 }
525
526 return rtn;
527 invalid:
528 *u = 0xFFFD;
529
530 return rtn;
531 }
532
533 int
534 utf8encode(long *u, char *s) {
535 uchar *sp;
536 ulong uc;
537 int i, n;
538
539 sp = (uchar *)s;
540 uc = *u;
541 if(uc < 0x80) {
542 *sp = uc; /* 0xxxxxxx */
543 return 1;
544 } else if(*u < 0x800) {
545 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
546 n = 1;
547 } else if(uc < 0x10000) {
548 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
549 n = 2;
550 } else if(uc <= 0x10FFFF) {
551 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
552 n = 3;
553 } else {
554 goto invalid;
555 }
556
557 for(i=n,++sp; i>0; --i,++sp)
558 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
559
560 return n+1;
561 invalid:
562 /* U+FFFD */
563 *s++ = '\xEF';
564 *s++ = '\xBF';
565 *s = '\xBD';
566
567 return 3;
568 }
569
570 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
571 UTF-8 otherwise return 0 */
572 int
573 isfullutf8(char *s, int b) {
574 uchar *c1, *c2, *c3;
575
576 c1 = (uchar *)s;
577 c2 = (uchar *)++s;
578 c3 = (uchar *)++s;
579 if(b < 1) {
580 return 0;
581 } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
582 return 0;
583 } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
584 ((b == 1) ||
585 ((b == 2) && (*c2&(B7|B6)) == B7))) {
586 return 0;
587 } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
588 ((b == 1) ||
589 ((b == 2) && (*c2&(B7|B6)) == B7) ||
590 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
591 return 0;
592 } else {
593 return 1;
594 }
595 }
596
597 int
598 utf8size(char *s) {
599 uchar c = *s;
600
601 if(~c&B7) {
602 return 1;
603 } else if((c&(B7|B6|B5)) == (B7|B6)) {
604 return 2;
605 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
606 return 3;
607 } else {
608 return 4;
609 }
610 }
611
612 void
613 selinit(void) {
614 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
615 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
616 sel.mode = 0;
617 sel.bx = -1;
618 sel.clip = NULL;
619 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
620 if(sel.xtarget == None)
621 sel.xtarget = XA_STRING;
622 }
623
624 static int
625 x2col(int x) {
626 x -= borderpx;
627 x /= xw.cw;
628
629 return LIMIT(x, 0, term.col-1);
630 }
631
632 static int
633 y2row(int y) {
634 y -= borderpx;
635 y /= xw.ch;
636
637 return LIMIT(y, 0, term.row-1);
638 }
639
640 static inline bool
641 selected(int x, int y) {
642 int bx, ex;
643
644 if(sel.ey == y && sel.by == y) {
645 bx = MIN(sel.bx, sel.ex);
646 ex = MAX(sel.bx, sel.ex);
647 return BETWEEN(x, bx, ex);
648 }
649
650 return ((sel.b.y < y && y < sel.e.y)
651 || (y == sel.e.y && x <= sel.e.x))
652 || (y == sel.b.y && x >= sel.b.x
653 && (x <= sel.e.x || sel.b.y != sel.e.y));
654 }
655
656 void
657 getbuttoninfo(XEvent *e) {
658 sel.alt = IS_SET(MODE_ALTSCREEN);
659
660 sel.ex = x2col(e->xbutton.x);
661 sel.ey = y2row(e->xbutton.y);
662
663 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
664 sel.b.y = MIN(sel.by, sel.ey);
665 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
666 sel.e.y = MAX(sel.by, sel.ey);
667 }
668
669 void
670 mousereport(XEvent *e) {
671 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
672 button = e->xbutton.button, state = e->xbutton.state,
673 len;
674 char buf[40];
675 static int ob, ox, oy;
676
677 /* from urxvt */
678 if(e->xbutton.type == MotionNotify) {
679 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
680 return;
681 button = ob + 32;
682 ox = x, oy = y;
683 } else if(!IS_SET(MODE_MOUSESGR)
684 && (e->xbutton.type == ButtonRelease
685 || button == AnyButton)) {
686 button = 3;
687 } else {
688 button -= Button1;
689 if(button >= 3)
690 button += 64 - 3;
691 if(e->xbutton.type == ButtonPress) {
692 ob = button;
693 ox = x, oy = y;
694 }
695 }
696
697 button += (state & ShiftMask ? 4 : 0)
698 + (state & Mod4Mask ? 8 : 0)
699 + (state & ControlMask ? 16 : 0);
700
701 len = 0;
702 if(IS_SET(MODE_MOUSESGR)) {
703 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
704 button, x+1, y+1,
705 e->xbutton.type == ButtonRelease ? 'm' : 'M');
706 } else if(x < 223 && y < 223) {
707 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
708 32+button, 32+x+1, 32+y+1);
709 } else {
710 return;
711 }
712
713 ttywrite(buf, len);
714 }
715
716 void
717 bpress(XEvent *e) {
718 if(IS_SET(MODE_MOUSE)) {
719 mousereport(e);
720 } else if(e->xbutton.button == Button1) {
721 if(sel.bx != -1) {
722 sel.bx = -1;
723 tsetdirt(sel.b.y, sel.e.y);
724 draw();
725 }
726 sel.mode = 1;
727 sel.ex = sel.bx = x2col(e->xbutton.x);
728 sel.ey = sel.by = y2row(e->xbutton.y);
729 } else if(e->xbutton.button == Button4) {
730 ttywrite("\031", 1);
731 } else if(e->xbutton.button == Button5) {
732 ttywrite("\005", 1);
733 }
734 }
735
736 void
737 selcopy(void) {
738 char *str, *ptr, *p;
739 int x, y, bufsize, is_selected = 0, size;
740 Glyph *gp, *last;
741
742 if(sel.bx == -1) {
743 str = NULL;
744 } else {
745 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
746 ptr = str = xmalloc(bufsize);
747
748 /* append every set & selected glyph to the selection */
749 for(y = 0; y < term.row; y++) {
750 gp = &term.line[y][0];
751 last = gp + term.col;
752
753 while(--last >= gp && !(last->state & GLYPH_SET))
754 /* nothing */;
755
756 for(x = 0; gp <= last; x++, ++gp) {
757 if(!(is_selected = selected(x, y)))
758 continue;
759
760 p = (gp->state & GLYPH_SET) ? gp->c : " ";
761 size = utf8size(p);
762 memcpy(ptr, p, size);
763 ptr += size;
764 }
765 /* \n at the end of every selected line except for the last one */
766 if(is_selected && y < sel.e.y)
767 *ptr++ = '\n';
768 }
769 *ptr = 0;
770 }
771 xsetsel(str);
772 }
773
774 void
775 selnotify(XEvent *e) {
776 ulong nitems, ofs, rem;
777 int format;
778 uchar *data;
779 Atom type;
780
781 ofs = 0;
782 do {
783 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
784 False, AnyPropertyType, &type, &format,
785 &nitems, &rem, &data)) {
786 fprintf(stderr, "Clipboard allocation failed\n");
787 return;
788 }
789 ttywrite((const char *) data, nitems * format / 8);
790 XFree(data);
791 /* number of 32-bit chunks returned */
792 ofs += nitems * format / 32;
793 } while(rem > 0);
794 }
795
796 void
797 selpaste(const Arg *dummy) {
798 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
799 xw.win, CurrentTime);
800 }
801
802 void selclear(XEvent *e) {
803 if(sel.bx == -1)
804 return;
805 sel.bx = -1;
806 tsetdirt(sel.b.y, sel.e.y);
807 }
808
809 void
810 selrequest(XEvent *e) {
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 /* register the selection for both the clipboard and the primary */
847 Atom clipboard;
848
849 free(sel.clip);
850 sel.clip = str;
851
852 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
853
854 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
855 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
856 }
857
858 void
859 brelease(XEvent *e) {
860 struct timeval now;
861
862 if(IS_SET(MODE_MOUSE)) {
863 mousereport(e);
864 return;
865 }
866
867 if(e->xbutton.button == Button2) {
868 selpaste(NULL);
869 } else if(e->xbutton.button == Button1) {
870 sel.mode = 0;
871 getbuttoninfo(e);
872 term.dirty[sel.ey] = 1;
873 if(sel.bx == sel.ex && sel.by == sel.ey) {
874 sel.bx = -1;
875 gettimeofday(&now, NULL);
876
877 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
878 /* triple click on the line */
879 sel.b.x = sel.bx = 0;
880 sel.e.x = sel.ex = term.col;
881 sel.b.y = sel.e.y = sel.ey;
882 selcopy();
883 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
884 /* double click to select word */
885 sel.bx = sel.ex;
886 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
887 term.line[sel.ey][sel.bx-1].c[0] != ' ') {
888 sel.bx--;
889 }
890 sel.b.x = sel.bx;
891 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
892 term.line[sel.ey][sel.ex+1].c[0] != ' ') {
893 sel.ex++;
894 }
895 sel.e.x = sel.ex;
896 sel.b.y = sel.e.y = sel.ey;
897 selcopy();
898 }
899 } else {
900 selcopy();
901 }
902 }
903
904 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
905 gettimeofday(&sel.tclick1, NULL);
906 }
907
908 void
909 bmotion(XEvent *e) {
910 int starty, endy, oldey, oldex;
911
912 if(IS_SET(MODE_MOUSE)) {
913 mousereport(e);
914 return;
915 }
916
917 if(!sel.mode)
918 return;
919
920 oldey = sel.ey;
921 oldex = sel.ex;
922 getbuttoninfo(e);
923
924 if(oldey != sel.ey || oldex != sel.ex) {
925 starty = MIN(oldey, sel.ey);
926 endy = MAX(oldey, sel.ey);
927 tsetdirt(starty, endy);
928 }
929 }
930
931 void
932 die(const char *errstr, ...) {
933 va_list ap;
934
935 va_start(ap, errstr);
936 vfprintf(stderr, errstr, ap);
937 va_end(ap);
938 exit(EXIT_FAILURE);
939 }
940
941 void
942 execsh(void) {
943 char **args;
944 char *envshell = getenv("SHELL");
945 const struct passwd *pass = getpwuid(getuid());
946 char buf[sizeof(long) * 8 + 1];
947
948 unsetenv("COLUMNS");
949 unsetenv("LINES");
950 unsetenv("TERMCAP");
951
952 if(pass) {
953 setenv("LOGNAME", pass->pw_name, 1);
954 setenv("USER", pass->pw_name, 1);
955 setenv("SHELL", pass->pw_shell, 0);
956 setenv("HOME", pass->pw_dir, 0);
957 }
958
959 snprintf(buf, sizeof(buf), "%lu", xw.win);
960 setenv("WINDOWID", buf, 1);
961
962 signal(SIGCHLD, SIG_DFL);
963 signal(SIGHUP, SIG_DFL);
964 signal(SIGINT, SIG_DFL);
965 signal(SIGQUIT, SIG_DFL);
966 signal(SIGTERM, SIG_DFL);
967 signal(SIGALRM, SIG_DFL);
968
969 DEFAULT(envshell, shell);
970 setenv("TERM", termname, 1);
971 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
972 execvp(args[0], args);
973 exit(EXIT_FAILURE);
974 }
975
976 void
977 sigchld(int a) {
978 int stat = 0;
979
980 if(waitpid(pid, &stat, 0) < 0)
981 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
982
983 if(WIFEXITED(stat)) {
984 exit(WEXITSTATUS(stat));
985 } else {
986 exit(EXIT_FAILURE);
987 }
988 }
989
990 void
991 ttynew(void) {
992 int m, s;
993 struct winsize w = {term.row, term.col, 0, 0};
994
995 /* seems to work fine on linux, openbsd and freebsd */
996 if(openpty(&m, &s, NULL, NULL, &w) < 0)
997 die("openpty failed: %s\n", SERRNO);
998
999 switch(pid = fork()) {
1000 case -1:
1001 die("fork failed\n");
1002 break;
1003 case 0:
1004 setsid(); /* create a new process group */
1005 dup2(s, STDIN_FILENO);
1006 dup2(s, STDOUT_FILENO);
1007 dup2(s, STDERR_FILENO);
1008 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1009 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1010 close(s);
1011 close(m);
1012 execsh();
1013 break;
1014 default:
1015 close(s);
1016 cmdfd = m;
1017 signal(SIGCHLD, sigchld);
1018 if(opt_io) {
1019 iofd = (!strcmp(opt_io, "-")) ?
1020 STDOUT_FILENO :
1021 open(opt_io, O_WRONLY | O_CREAT, 0666);
1022 if(iofd < 0) {
1023 fprintf(stderr, "Error opening %s:%s\n",
1024 opt_io, strerror(errno));
1025 }
1026 }
1027 }
1028 }
1029
1030 void
1031 dump(char c) {
1032 static int col;
1033
1034 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1035 if(++col % 10 == 0)
1036 fprintf(stderr, "\n");
1037 }
1038
1039 void
1040 ttyread(void) {
1041 static char buf[BUFSIZ];
1042 static int buflen = 0;
1043 char *ptr;
1044 char s[UTF_SIZ];
1045 int charsize; /* size of utf8 char in bytes */
1046 long utf8c;
1047 int ret;
1048
1049 /* append read bytes to unprocessed bytes */
1050 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1051 die("Couldn't read from shell: %s\n", SERRNO);
1052
1053 /* process every complete utf8 char */
1054 buflen += ret;
1055 ptr = buf;
1056 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1057 charsize = utf8decode(ptr, &utf8c);
1058 utf8encode(&utf8c, s);
1059 tputc(s, charsize);
1060 ptr += charsize;
1061 buflen -= charsize;
1062 }
1063
1064 /* keep any uncomplete utf8 char for the next call */
1065 memmove(buf, ptr, buflen);
1066 }
1067
1068 void
1069 ttywrite(const char *s, size_t n) {
1070 if(write(cmdfd, s, n) == -1)
1071 die("write error on tty: %s\n", SERRNO);
1072 }
1073
1074 void
1075 ttyresize(void) {
1076 struct winsize w;
1077
1078 w.ws_row = term.row;
1079 w.ws_col = term.col;
1080 w.ws_xpixel = xw.tw;
1081 w.ws_ypixel = xw.th;
1082 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1083 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1084 }
1085
1086 void
1087 tsetdirt(int top, int bot) {
1088 int i;
1089
1090 LIMIT(top, 0, term.row-1);
1091 LIMIT(bot, 0, term.row-1);
1092
1093 for(i = top; i <= bot; i++)
1094 term.dirty[i] = 1;
1095 }
1096
1097 void
1098 tfulldirt(void) {
1099 tsetdirt(0, term.row-1);
1100 }
1101
1102 void
1103 tcursor(int mode) {
1104 static TCursor c;
1105
1106 if(mode == CURSOR_SAVE) {
1107 c = term.c;
1108 } else if(mode == CURSOR_LOAD) {
1109 term.c = c;
1110 tmoveto(c.x, c.y);
1111 }
1112 }
1113
1114 void
1115 treset(void) {
1116 uint i;
1117
1118 term.c = (TCursor){{
1119 .mode = ATTR_NULL,
1120 .fg = defaultfg,
1121 .bg = defaultbg
1122 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1123
1124 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1125 for(i = tabspaces; i < term.col; i += tabspaces)
1126 term.tabs[i] = 1;
1127 term.top = 0;
1128 term.bot = term.row - 1;
1129 term.mode = MODE_WRAP;
1130
1131 tclearregion(0, 0, term.col-1, term.row-1, 0);
1132 tmoveto(0, 0);
1133 tcursor(CURSOR_SAVE);
1134 }
1135
1136 void
1137 tnew(int col, int row) {
1138 /* set screen size */
1139 term.row = row;
1140 term.col = col;
1141 term.line = xmalloc(term.row * sizeof(Line));
1142 term.alt = xmalloc(term.row * sizeof(Line));
1143 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
1144 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
1145
1146 for(row = 0; row < term.row; row++) {
1147 term.line[row] = xmalloc(term.col * sizeof(Glyph));
1148 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
1149 term.dirty[row] = 0;
1150 }
1151
1152 term.numlock = 1;
1153 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1154 /* setup screen */
1155 treset();
1156 }
1157
1158 void
1159 tswapscreen(void) {
1160 Line *tmp = term.line;
1161
1162 term.line = term.alt;
1163 term.alt = tmp;
1164 term.mode ^= MODE_ALTSCREEN;
1165 tfulldirt();
1166 }
1167
1168 void
1169 tscrolldown(int orig, int n) {
1170 int i;
1171 Line temp;
1172
1173 LIMIT(n, 0, term.bot-orig+1);
1174
1175 tclearregion(0, term.bot-n+1, term.col-1, term.bot, 0);
1176
1177 for(i = term.bot; i >= orig+n; i--) {
1178 temp = term.line[i];
1179 term.line[i] = term.line[i-n];
1180 term.line[i-n] = temp;
1181
1182 term.dirty[i] = 1;
1183 term.dirty[i-n] = 1;
1184 }
1185
1186 selscroll(orig, n);
1187 }
1188
1189 void
1190 tscrollup(int orig, int n) {
1191 int i;
1192 Line temp;
1193 LIMIT(n, 0, term.bot-orig+1);
1194
1195 tclearregion(0, orig, term.col-1, orig+n-1, 0);
1196
1197 for(i = orig; i <= term.bot-n; i++) {
1198 temp = term.line[i];
1199 term.line[i] = term.line[i+n];
1200 term.line[i+n] = temp;
1201
1202 term.dirty[i] = 1;
1203 term.dirty[i+n] = 1;
1204 }
1205
1206 selscroll(orig, -n);
1207 }
1208
1209 void
1210 selscroll(int orig, int n) {
1211 if(sel.bx == -1)
1212 return;
1213
1214 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1215 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1216 sel.bx = -1;
1217 return;
1218 }
1219 if(sel.by < term.top) {
1220 sel.by = term.top;
1221 sel.bx = 0;
1222 }
1223 if(sel.ey > term.bot) {
1224 sel.ey = term.bot;
1225 sel.ex = term.col;
1226 }
1227 sel.b.y = sel.by, sel.b.x = sel.bx;
1228 sel.e.y = sel.ey, sel.e.x = sel.ex;
1229 }
1230 }
1231
1232 void
1233 tnewline(int first_col) {
1234 int y = term.c.y;
1235
1236 if(y == term.bot) {
1237 tscrollup(term.top, 1);
1238 } else {
1239 y++;
1240 }
1241 tmoveto(first_col ? 0 : term.c.x, y);
1242 }
1243
1244 void
1245 csiparse(void) {
1246 /* int noarg = 1; */
1247 char *p = csiescseq.buf;
1248
1249 csiescseq.narg = 0;
1250 if(*p == '?')
1251 csiescseq.priv = 1, p++;
1252
1253 while(p < csiescseq.buf+csiescseq.len) {
1254 while(isdigit(*p)) {
1255 csiescseq.arg[csiescseq.narg] *= 10;
1256 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1257 }
1258 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ) {
1259 csiescseq.narg++, p++;
1260 } else {
1261 csiescseq.mode = *p;
1262 csiescseq.narg++;
1263
1264 return;
1265 }
1266 }
1267 }
1268
1269 /* for absolute user moves, when decom is set */
1270 void
1271 tmoveato(int x, int y) {
1272 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1273 }
1274
1275 void
1276 tmoveto(int x, int y) {
1277 int miny, maxy;
1278
1279 if(term.c.state & CURSOR_ORIGIN) {
1280 miny = term.top;
1281 maxy = term.bot;
1282 } else {
1283 miny = 0;
1284 maxy = term.row - 1;
1285 }
1286 LIMIT(x, 0, term.col-1);
1287 LIMIT(y, miny, maxy);
1288 term.c.state &= ~CURSOR_WRAPNEXT;
1289 term.c.x = x;
1290 term.c.y = y;
1291 }
1292
1293 void
1294 tsetchar(char *c, Glyph *attr, int x, int y) {
1295 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1296 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1297 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1298 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1299 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1300 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1301 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1302 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1303 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1304 };
1305
1306 /*
1307 * The table is proudly stolen from rxvt.
1308 */
1309 if(attr->mode & ATTR_GFX) {
1310 if(c[0] >= 0x41 && c[0] <= 0x7e
1311 && vt100_0[c[0] - 0x41]) {
1312 c = vt100_0[c[0] - 0x41];
1313 }
1314 }
1315
1316 term.dirty[y] = 1;
1317 term.line[y][x] = *attr;
1318 memcpy(term.line[y][x].c, c, UTF_SIZ);
1319 term.line[y][x].state |= GLYPH_SET;
1320 }
1321
1322 void
1323 tclearregion(int x1, int y1, int x2, int y2, int bce) {
1324 int x, y, temp;
1325
1326 if(x1 > x2)
1327 temp = x1, x1 = x2, x2 = temp;
1328 if(y1 > y2)
1329 temp = y1, y1 = y2, y2 = temp;
1330
1331 LIMIT(x1, 0, term.col-1);
1332 LIMIT(x2, 0, term.col-1);
1333 LIMIT(y1, 0, term.row-1);
1334 LIMIT(y2, 0, term.row-1);
1335
1336 for(y = y1; y <= y2; y++) {
1337 term.dirty[y] = 1;
1338 for(x = x1; x <= x2; x++) {
1339 if(bce) {
1340 term.line[y][x] = term.c.attr;
1341 memcpy(term.line[y][x].c, " ", 2);
1342 term.line[y][x].state |= GLYPH_SET;
1343 } else {
1344 term.line[y][x].state = 0;
1345 }
1346 }
1347 }
1348 }
1349
1350 void
1351 tdeletechar(int n) {
1352 int src = term.c.x + n;
1353 int dst = term.c.x;
1354 int size = term.col - src;
1355
1356 term.dirty[term.c.y] = 1;
1357
1358 if(src >= term.col) {
1359 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1360 return;
1361 }
1362
1363 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1364 size * sizeof(Glyph));
1365 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y, 0);
1366 }
1367
1368 void
1369 tinsertblank(int n) {
1370 int src = term.c.x;
1371 int dst = src + n;
1372 int size = term.col - dst;
1373
1374 term.dirty[term.c.y] = 1;
1375
1376 if(dst >= term.col) {
1377 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1378 return;
1379 }
1380
1381 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1382 size * sizeof(Glyph));
1383 tclearregion(src, term.c.y, dst - 1, term.c.y, 0);
1384 }
1385
1386 void
1387 tinsertblankline(int n) {
1388 if(term.c.y < term.top || term.c.y > term.bot)
1389 return;
1390
1391 tscrolldown(term.c.y, n);
1392 }
1393
1394 void
1395 tdeleteline(int n) {
1396 if(term.c.y < term.top || term.c.y > term.bot)
1397 return;
1398
1399 tscrollup(term.c.y, n);
1400 }
1401
1402 void
1403 tsetattr(int *attr, int l) {
1404 int i;
1405
1406 for(i = 0; i < l; i++) {
1407 switch(attr[i]) {
1408 case 0:
1409 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1410 | ATTR_ITALIC | ATTR_BLINK);
1411 term.c.attr.fg = defaultfg;
1412 term.c.attr.bg = defaultbg;
1413 break;
1414 case 1:
1415 term.c.attr.mode |= ATTR_BOLD;
1416 break;
1417 case 3:
1418 term.c.attr.mode |= ATTR_ITALIC;
1419 break;
1420 case 4:
1421 term.c.attr.mode |= ATTR_UNDERLINE;
1422 break;
1423 case 5: /* slow blink */
1424 case 6: /* rapid blink */
1425 term.c.attr.mode |= ATTR_BLINK;
1426 break;
1427 case 7:
1428 term.c.attr.mode |= ATTR_REVERSE;
1429 break;
1430 case 21:
1431 case 22:
1432 term.c.attr.mode &= ~ATTR_BOLD;
1433 break;
1434 case 23:
1435 term.c.attr.mode &= ~ATTR_ITALIC;
1436 break;
1437 case 24:
1438 term.c.attr.mode &= ~ATTR_UNDERLINE;
1439 break;
1440 case 25:
1441 case 26:
1442 term.c.attr.mode &= ~ATTR_BLINK;
1443 break;
1444 case 27:
1445 term.c.attr.mode &= ~ATTR_REVERSE;
1446 break;
1447 case 38:
1448 if(i + 2 < l && attr[i + 1] == 5) {
1449 i += 2;
1450 if(BETWEEN(attr[i], 0, 255)) {
1451 term.c.attr.fg = attr[i];
1452 } else {
1453 fprintf(stderr,
1454 "erresc: bad fgcolor %d\n",
1455 attr[i]);
1456 }
1457 } else {
1458 fprintf(stderr,
1459 "erresc(38): gfx attr %d unknown\n",
1460 attr[i]);
1461 }
1462 break;
1463 case 39:
1464 term.c.attr.fg = defaultfg;
1465 break;
1466 case 48:
1467 if(i + 2 < l && attr[i + 1] == 5) {
1468 i += 2;
1469 if(BETWEEN(attr[i], 0, 255)) {
1470 term.c.attr.bg = attr[i];
1471 } else {
1472 fprintf(stderr,
1473 "erresc: bad bgcolor %d\n",
1474 attr[i]);
1475 }
1476 } else {
1477 fprintf(stderr,
1478 "erresc(48): gfx attr %d unknown\n",
1479 attr[i]);
1480 }
1481 break;
1482 case 49:
1483 term.c.attr.bg = defaultbg;
1484 break;
1485 default:
1486 if(BETWEEN(attr[i], 30, 37)) {
1487 term.c.attr.fg = attr[i] - 30;
1488 } else if(BETWEEN(attr[i], 40, 47)) {
1489 term.c.attr.bg = attr[i] - 40;
1490 } else if(BETWEEN(attr[i], 90, 97)) {
1491 term.c.attr.fg = attr[i] - 90 + 8;
1492 } else if(BETWEEN(attr[i], 100, 107)) {
1493 term.c.attr.bg = attr[i] - 100 + 8;
1494 } else {
1495 fprintf(stderr,
1496 "erresc(default): gfx attr %d unknown\n",
1497 attr[i]), csidump();
1498 }
1499 break;
1500 }
1501 }
1502 }
1503
1504 void
1505 tsetscroll(int t, int b) {
1506 int temp;
1507
1508 LIMIT(t, 0, term.row-1);
1509 LIMIT(b, 0, term.row-1);
1510 if(t > b) {
1511 temp = t;
1512 t = b;
1513 b = temp;
1514 }
1515 term.top = t;
1516 term.bot = b;
1517 }
1518
1519 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1520
1521 void
1522 tsetmode(bool priv, bool set, int *args, int narg) {
1523 int *lim, mode;
1524 bool alt;
1525
1526 for(lim = args + narg; args < lim; ++args) {
1527 if(priv) {
1528 switch(*args) {
1529 break;
1530 case 1: /* DECCKM -- Cursor key */
1531 MODBIT(term.mode, set, MODE_APPCURSOR);
1532 break;
1533 case 5: /* DECSCNM -- Reverse video */
1534 mode = term.mode;
1535 MODBIT(term.mode, set, MODE_REVERSE);
1536 if(mode != term.mode)
1537 redraw(REDRAW_TIMEOUT);
1538 break;
1539 case 6: /* DECOM -- Origin */
1540 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1541 tmoveato(0, 0);
1542 break;
1543 case 7: /* DECAWM -- Auto wrap */
1544 MODBIT(term.mode, set, MODE_WRAP);
1545 break;
1546 case 0: /* Error (IGNORED) */
1547 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1548 case 3: /* DECCOLM -- Column (IGNORED) */
1549 case 4: /* DECSCLM -- Scroll (IGNORED) */
1550 case 8: /* DECARM -- Auto repeat (IGNORED) */
1551 case 18: /* DECPFF -- Printer feed (IGNORED) */
1552 case 19: /* DECPEX -- Printer extent (IGNORED) */
1553 case 42: /* DECNRCM -- National characters (IGNORED) */
1554 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1555 break;
1556 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1557 MODBIT(term.mode, !set, MODE_HIDE);
1558 break;
1559 case 1000: /* 1000,1002: enable xterm mouse report */
1560 MODBIT(term.mode, set, MODE_MOUSEBTN);
1561 MODBIT(term.mode, 0, MODE_MOUSEMOTION);
1562 break;
1563 case 1002:
1564 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1565 MODBIT(term.mode, 0, MODE_MOUSEBTN);
1566 break;
1567 case 1006:
1568 MODBIT(term.mode, set, MODE_MOUSESGR);
1569 break;
1570 case 1049: /* = 1047 and 1048 */
1571 case 47:
1572 case 1047: {
1573 alt = IS_SET(MODE_ALTSCREEN);
1574 if(alt) {
1575 tclearregion(0, 0, term.col-1,
1576 term.row-1, 0);
1577 }
1578 if(set ^ alt) /* set is always 1 or 0 */
1579 tswapscreen();
1580 if(*args != 1049)
1581 break;
1582 }
1583 /* pass through */
1584 case 1048:
1585 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1586 break;
1587 default:
1588 fprintf(stderr,
1589 "erresc: unknown private set/reset mode %d\n",
1590 *args);
1591 break;
1592 }
1593 } else {
1594 switch(*args) {
1595 case 0: /* Error (IGNORED) */
1596 break;
1597 case 2: /* KAM -- keyboard action */
1598 MODBIT(term.mode, set, MODE_KBDLOCK);
1599 break;
1600 case 4: /* IRM -- Insertion-replacement */
1601 MODBIT(term.mode, set, MODE_INSERT);
1602 break;
1603 case 12: /* SRM -- Send/Receive */
1604 MODBIT(term.mode, !set, MODE_ECHO);
1605 break;
1606 case 20: /* LNM -- Linefeed/new line */
1607 MODBIT(term.mode, set, MODE_CRLF);
1608 break;
1609 default:
1610 fprintf(stderr,
1611 "erresc: unknown set/reset mode %d\n",
1612 *args);
1613 break;
1614 }
1615 }
1616 }
1617 }
1618 #undef MODBIT
1619
1620
1621 void
1622 csihandle(void) {
1623 switch(csiescseq.mode) {
1624 default:
1625 unknown:
1626 fprintf(stderr, "erresc: unknown csi ");
1627 csidump();
1628 /* die(""); */
1629 break;
1630 case '@': /* ICH -- Insert <n> blank char */
1631 DEFAULT(csiescseq.arg[0], 1);
1632 tinsertblank(csiescseq.arg[0]);
1633 break;
1634 case 'A': /* CUU -- Cursor <n> Up */
1635 DEFAULT(csiescseq.arg[0], 1);
1636 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1637 break;
1638 case 'B': /* CUD -- Cursor <n> Down */
1639 case 'e': /* VPR --Cursor <n> Down */
1640 DEFAULT(csiescseq.arg[0], 1);
1641 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1642 break;
1643 case 'c': /* DA -- Device Attributes */
1644 if(csiescseq.arg[0] == 0)
1645 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1646 break;
1647 case 'C': /* CUF -- Cursor <n> Forward */
1648 case 'a': /* HPR -- Cursor <n> Forward */
1649 DEFAULT(csiescseq.arg[0], 1);
1650 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1651 break;
1652 case 'D': /* CUB -- Cursor <n> Backward */
1653 DEFAULT(csiescseq.arg[0], 1);
1654 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1655 break;
1656 case 'E': /* CNL -- Cursor <n> Down and first col */
1657 DEFAULT(csiescseq.arg[0], 1);
1658 tmoveto(0, term.c.y+csiescseq.arg[0]);
1659 break;
1660 case 'F': /* CPL -- Cursor <n> Up and first col */
1661 DEFAULT(csiescseq.arg[0], 1);
1662 tmoveto(0, term.c.y-csiescseq.arg[0]);
1663 break;
1664 case 'g': /* TBC -- Tabulation clear */
1665 switch(csiescseq.arg[0]) {
1666 case 0: /* clear current tab stop */
1667 term.tabs[term.c.x] = 0;
1668 break;
1669 case 3: /* clear all the tabs */
1670 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1671 break;
1672 default:
1673 goto unknown;
1674 }
1675 break;
1676 case 'G': /* CHA -- Move to <col> */
1677 case '`': /* HPA */
1678 DEFAULT(csiescseq.arg[0], 1);
1679 tmoveto(csiescseq.arg[0]-1, term.c.y);
1680 break;
1681 case 'H': /* CUP -- Move to <row> <col> */
1682 case 'f': /* HVP */
1683 DEFAULT(csiescseq.arg[0], 1);
1684 DEFAULT(csiescseq.arg[1], 1);
1685 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1686 break;
1687 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1688 DEFAULT(csiescseq.arg[0], 1);
1689 while(csiescseq.arg[0]--)
1690 tputtab(1);
1691 break;
1692 case 'J': /* ED -- Clear screen */
1693 sel.bx = -1;
1694 switch(csiescseq.arg[0]) {
1695 case 0: /* below */
1696 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 1);
1697 if(term.c.y < term.row-1) {
1698 tclearregion(0, term.c.y+1, term.col-1,
1699 term.row-1, 1);
1700 }
1701 break;
1702 case 1: /* above */
1703 if(term.c.y > 1)
1704 tclearregion(0, 0, term.col-1, term.c.y-1, 1);
1705 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1706 break;
1707 case 2: /* all */
1708 tclearregion(0, 0, term.col-1, term.row-1, 1);
1709 break;
1710 default:
1711 goto unknown;
1712 }
1713 break;
1714 case 'K': /* EL -- Clear line */
1715 switch(csiescseq.arg[0]) {
1716 case 0: /* right */
1717 tclearregion(term.c.x, term.c.y, term.col-1,
1718 term.c.y, 1);
1719 break;
1720 case 1: /* left */
1721 tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1722 break;
1723 case 2: /* all */
1724 tclearregion(0, term.c.y, term.col-1, term.c.y, 1);
1725 break;
1726 }
1727 break;
1728 case 'S': /* SU -- Scroll <n> line up */
1729 DEFAULT(csiescseq.arg[0], 1);
1730 tscrollup(term.top, csiescseq.arg[0]);
1731 break;
1732 case 'T': /* SD -- Scroll <n> line down */
1733 DEFAULT(csiescseq.arg[0], 1);
1734 tscrolldown(term.top, csiescseq.arg[0]);
1735 break;
1736 case 'L': /* IL -- Insert <n> blank lines */
1737 DEFAULT(csiescseq.arg[0], 1);
1738 tinsertblankline(csiescseq.arg[0]);
1739 break;
1740 case 'l': /* RM -- Reset Mode */
1741 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1742 break;
1743 case 'M': /* DL -- Delete <n> lines */
1744 DEFAULT(csiescseq.arg[0], 1);
1745 tdeleteline(csiescseq.arg[0]);
1746 break;
1747 case 'X': /* ECH -- Erase <n> char */
1748 DEFAULT(csiescseq.arg[0], 1);
1749 tclearregion(term.c.x, term.c.y,
1750 term.c.x + csiescseq.arg[0] - 1, term.c.y, 1);
1751 break;
1752 case 'P': /* DCH -- Delete <n> char */
1753 DEFAULT(csiescseq.arg[0], 1);
1754 tdeletechar(csiescseq.arg[0]);
1755 break;
1756 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1757 DEFAULT(csiescseq.arg[0], 1);
1758 while(csiescseq.arg[0]--)
1759 tputtab(0);
1760 break;
1761 case 'd': /* VPA -- Move to <row> */
1762 DEFAULT(csiescseq.arg[0], 1);
1763 tmoveato(term.c.x, csiescseq.arg[0]-1);
1764 break;
1765 case 'h': /* SM -- Set terminal mode */
1766 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1767 break;
1768 case 'm': /* SGR -- Terminal attribute (color) */
1769 tsetattr(csiescseq.arg, csiescseq.narg);
1770 break;
1771 case 'r': /* DECSTBM -- Set Scrolling Region */
1772 if(csiescseq.priv) {
1773 goto unknown;
1774 } else {
1775 DEFAULT(csiescseq.arg[0], 1);
1776 DEFAULT(csiescseq.arg[1], term.row);
1777 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1778 tmoveato(0, 0);
1779 }
1780 break;
1781 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1782 tcursor(CURSOR_SAVE);
1783 break;
1784 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1785 tcursor(CURSOR_LOAD);
1786 break;
1787 }
1788 }
1789
1790 void
1791 csidump(void) {
1792 int i;
1793 uint c;
1794
1795 printf("ESC[");
1796 for(i = 0; i < csiescseq.len; i++) {
1797 c = csiescseq.buf[i] & 0xff;
1798 if(isprint(c)) {
1799 putchar(c);
1800 } else if(c == '\n') {
1801 printf("(\\n)");
1802 } else if(c == '\r') {
1803 printf("(\\r)");
1804 } else if(c == 0x1b) {
1805 printf("(\\e)");
1806 } else {
1807 printf("(%02x)", c);
1808 }
1809 }
1810 putchar('\n');
1811 }
1812
1813 void
1814 csireset(void) {
1815 memset(&csiescseq, 0, sizeof(csiescseq));
1816 }
1817
1818 void
1819 strhandle(void) {
1820 char *p;
1821
1822 /*
1823 * TODO: make this being useful in case of color palette change.
1824 */
1825 strparse();
1826
1827 p = strescseq.buf;
1828
1829 switch(strescseq.type) {
1830 case ']': /* OSC -- Operating System Command */
1831 switch(p[0]) {
1832 case '0':
1833 case '1':
1834 case '2':
1835 /*
1836 * TODO: Handle special chars in string, like umlauts.
1837 */
1838 if(p[1] == ';') {
1839 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1840 }
1841 break;
1842 case ';':
1843 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1844 break;
1845 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1846 break;
1847 default:
1848 fprintf(stderr, "erresc: unknown str ");
1849 strdump();
1850 break;
1851 }
1852 break;
1853 case 'k': /* old title set compatibility */
1854 XStoreName(xw.dpy, xw.win, strescseq.buf);
1855 break;
1856 case 'P': /* DSC -- Device Control String */
1857 case '_': /* APC -- Application Program Command */
1858 case '^': /* PM -- Privacy Message */
1859 default:
1860 fprintf(stderr, "erresc: unknown str ");
1861 strdump();
1862 /* die(""); */
1863 break;
1864 }
1865 }
1866
1867 void
1868 strparse(void) {
1869 /*
1870 * TODO: Implement parsing like for CSI when required.
1871 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1872 */
1873 return;
1874 }
1875
1876 void
1877 strdump(void) {
1878 int i;
1879 uint c;
1880
1881 printf("ESC%c", strescseq.type);
1882 for(i = 0; i < strescseq.len; i++) {
1883 c = strescseq.buf[i] & 0xff;
1884 if(isprint(c)) {
1885 putchar(c);
1886 } else if(c == '\n') {
1887 printf("(\\n)");
1888 } else if(c == '\r') {
1889 printf("(\\r)");
1890 } else if(c == 0x1b) {
1891 printf("(\\e)");
1892 } else {
1893 printf("(%02x)", c);
1894 }
1895 }
1896 printf("ESC\\\n");
1897 }
1898
1899 void
1900 strreset(void) {
1901 memset(&strescseq, 0, sizeof(strescseq));
1902 }
1903
1904 void
1905 tputtab(bool forward) {
1906 uint x = term.c.x;
1907
1908 if(forward) {
1909 if(x == term.col)
1910 return;
1911 for(++x; x < term.col && !term.tabs[x]; ++x)
1912 /* nothing */ ;
1913 } else {
1914 if(x == 0)
1915 return;
1916 for(--x; x > 0 && !term.tabs[x]; --x)
1917 /* nothing */ ;
1918 }
1919 tmoveto(x, term.c.y);
1920 }
1921
1922 void
1923 techo(char *buf, int len) {
1924 for(; len > 0; buf++, len--) {
1925 char c = *buf;
1926
1927 if(c == '\033') { /* escape */
1928 tputc("^", 1);
1929 tputc("[", 1);
1930 } else if(c < '\x20') { /* control code */
1931 if(c != '\n' && c != '\r' && c != '\t') {
1932 c |= '\x40';
1933 tputc("^", 1);
1934 }
1935 tputc(&c, 1);
1936 } else {
1937 break;
1938 }
1939 }
1940 if(len)
1941 tputc(buf, len);
1942 }
1943
1944 void
1945 tputc(char *c, int len) {
1946 uchar ascii = *c;
1947 bool control = ascii < '\x20' || ascii == 0177;
1948
1949 if(iofd != -1) {
1950 if(xwrite(iofd, c, len) < 0) {
1951 fprintf(stderr, "Error writing in %s:%s\n",
1952 opt_io, strerror(errno));
1953 close(iofd);
1954 iofd = -1;
1955 }
1956 }
1957
1958 /*
1959 * STR sequences must be checked before anything else
1960 * because it can use some control codes as part of the sequence.
1961 */
1962 if(term.esc & ESC_STR) {
1963 switch(ascii) {
1964 case '\033':
1965 term.esc = ESC_START | ESC_STR_END;
1966 break;
1967 case '\a': /* backwards compatibility to xterm */
1968 term.esc = 0;
1969 strhandle();
1970 break;
1971 default:
1972 if(strescseq.len + len < sizeof(strescseq.buf)) {
1973 memmove(&strescseq.buf[strescseq.len], c, len);
1974 strescseq.len += len;
1975 } else {
1976 /*
1977 * Here is a bug in terminals. If the user never sends
1978 * some code to stop the str or esc command, then st
1979 * will stop responding. But this is better than
1980 * silently failing with unknown characters. At least
1981 * then users will report back.
1982 *
1983 * In the case users ever get fixed, here is the code:
1984 */
1985 /*
1986 * term.esc = 0;
1987 * strhandle();
1988 */
1989 }
1990 }
1991 return;
1992 }
1993
1994 /*
1995 * Actions of control codes must be performed as soon they arrive
1996 * because they can be embedded inside a control sequence, and
1997 * they must not cause conflicts with sequences.
1998 */
1999 if(control) {
2000 switch(ascii) {
2001 case '\t': /* HT */
2002 tputtab(1);
2003 return;
2004 case '\b': /* BS */
2005 tmoveto(term.c.x-1, term.c.y);
2006 return;
2007 case '\r': /* CR */
2008 tmoveto(0, term.c.y);
2009 return;
2010 case '\f': /* LF */
2011 case '\v': /* VT */
2012 case '\n': /* LF */
2013 /* go to first col if the mode is set */
2014 tnewline(IS_SET(MODE_CRLF));
2015 return;
2016 case '\a': /* BEL */
2017 if(!(xw.state & WIN_FOCUSED))
2018 xseturgency(1);
2019 return;
2020 case '\033': /* ESC */
2021 csireset();
2022 term.esc = ESC_START;
2023 return;
2024 case '\016': /* SO */
2025 case '\017': /* SI */
2026 /*
2027 * Different charsets are hard to handle. Applications
2028 * should use the right alt charset escapes for the
2029 * only reason they still exist: line drawing. The
2030 * rest is incompatible history st should not support.
2031 */
2032 return;
2033 case '\032': /* SUB */
2034 case '\030': /* CAN */
2035 csireset();
2036 return;
2037 case '\005': /* ENQ (IGNORED) */
2038 case '\000': /* NUL (IGNORED) */
2039 case '\021': /* XON (IGNORED) */
2040 case '\023': /* XOFF (IGNORED) */
2041 case 0177: /* DEL (IGNORED) */
2042 return;
2043 }
2044 } else if(term.esc & ESC_START) {
2045 if(term.esc & ESC_CSI) {
2046 csiescseq.buf[csiescseq.len++] = ascii;
2047 if(BETWEEN(ascii, 0x40, 0x7E)
2048 || csiescseq.len >= ESC_BUF_SIZ) {
2049 term.esc = 0;
2050 csiparse(), csihandle();
2051 }
2052 } else if(term.esc & ESC_STR_END) {
2053 term.esc = 0;
2054 if(ascii == '\\')
2055 strhandle();
2056 } else if(term.esc & ESC_ALTCHARSET) {
2057 switch(ascii) {
2058 case '0': /* Line drawing set */
2059 term.c.attr.mode |= ATTR_GFX;
2060 break;
2061 case 'B': /* USASCII */
2062 term.c.attr.mode &= ~ATTR_GFX;
2063 break;
2064 case 'A': /* UK (IGNORED) */
2065 case '<': /* multinational charset (IGNORED) */
2066 case '5': /* Finnish (IGNORED) */
2067 case 'C': /* Finnish (IGNORED) */
2068 case 'K': /* German (IGNORED) */
2069 break;
2070 default:
2071 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2072 }
2073 term.esc = 0;
2074 } else if(term.esc & ESC_TEST) {
2075 if(ascii == '8') { /* DEC screen alignment test. */
2076 char E[UTF_SIZ] = "E";
2077 int x, y;
2078
2079 for(x = 0; x < term.col; ++x) {
2080 for(y = 0; y < term.row; ++y)
2081 tsetchar(E, &term.c.attr, x, y);
2082 }
2083 }
2084 term.esc = 0;
2085 } else {
2086 switch(ascii) {
2087 case '[':
2088 term.esc |= ESC_CSI;
2089 break;
2090 case '#':
2091 term.esc |= ESC_TEST;
2092 break;
2093 case 'P': /* DCS -- Device Control String */
2094 case '_': /* APC -- Application Program Command */
2095 case '^': /* PM -- Privacy Message */
2096 case ']': /* OSC -- Operating System Command */
2097 case 'k': /* old title set compatibility */
2098 strreset();
2099 strescseq.type = ascii;
2100 term.esc |= ESC_STR;
2101 break;
2102 case '(': /* set primary charset G0 */
2103 term.esc |= ESC_ALTCHARSET;
2104 break;
2105 case ')': /* set secondary charset G1 (IGNORED) */
2106 case '*': /* set tertiary charset G2 (IGNORED) */
2107 case '+': /* set quaternary charset G3 (IGNORED) */
2108 term.esc = 0;
2109 break;
2110 case 'D': /* IND -- Linefeed */
2111 if(term.c.y == term.bot) {
2112 tscrollup(term.top, 1);
2113 } else {
2114 tmoveto(term.c.x, term.c.y+1);
2115 }
2116 term.esc = 0;
2117 break;
2118 case 'E': /* NEL -- Next line */
2119 tnewline(1); /* always go to first col */
2120 term.esc = 0;
2121 break;
2122 case 'H': /* HTS -- Horizontal tab stop */
2123 term.tabs[term.c.x] = 1;
2124 term.esc = 0;
2125 break;
2126 case 'M': /* RI -- Reverse index */
2127 if(term.c.y == term.top) {
2128 tscrolldown(term.top, 1);
2129 } else {
2130 tmoveto(term.c.x, term.c.y-1);
2131 }
2132 term.esc = 0;
2133 break;
2134 case 'Z': /* DECID -- Identify Terminal */
2135 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2136 term.esc = 0;
2137 break;
2138 case 'c': /* RIS -- Reset to inital state */
2139 treset();
2140 term.esc = 0;
2141 xresettitle();
2142 break;
2143 case '=': /* DECPAM -- Application keypad */
2144 term.mode |= MODE_APPKEYPAD;
2145 term.esc = 0;
2146 break;
2147 case '>': /* DECPNM -- Normal keypad */
2148 term.mode &= ~MODE_APPKEYPAD;
2149 term.esc = 0;
2150 break;
2151 case '7': /* DECSC -- Save Cursor */
2152 tcursor(CURSOR_SAVE);
2153 term.esc = 0;
2154 break;
2155 case '8': /* DECRC -- Restore Cursor */
2156 tcursor(CURSOR_LOAD);
2157 term.esc = 0;
2158 break;
2159 case '\\': /* ST -- Stop */
2160 term.esc = 0;
2161 break;
2162 default:
2163 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2164 (uchar) ascii, isprint(ascii)? ascii:'.');
2165 term.esc = 0;
2166 }
2167 }
2168 /*
2169 * All characters which form part of a sequence are not
2170 * printed
2171 */
2172 return;
2173 }
2174 /*
2175 * Display control codes only if we are in graphic mode
2176 */
2177 if(control && !(term.c.attr.mode & ATTR_GFX))
2178 return;
2179 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2180 sel.bx = -1;
2181 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2182 tnewline(1); /* always go to first col */
2183
2184 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2185 memmove(&term.line[term.c.y][term.c.x+1],
2186 &term.line[term.c.y][term.c.x],
2187 (term.col - term.c.x - 1) * sizeof(Glyph));
2188 }
2189
2190 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2191 if(term.c.x+1 < term.col) {
2192 tmoveto(term.c.x+1, term.c.y);
2193 } else {
2194 term.c.state |= CURSOR_WRAPNEXT;
2195 }
2196 }
2197
2198 int
2199 tresize(int col, int row) {
2200 int i, x;
2201 int minrow = MIN(row, term.row);
2202 int mincol = MIN(col, term.col);
2203 int slide = term.c.y - row + 1;
2204 bool *bp;
2205
2206 if(col < 1 || row < 1)
2207 return 0;
2208
2209 /* free unneeded rows */
2210 i = 0;
2211 if(slide > 0) {
2212 /*
2213 * slide screen to keep cursor where we expect it -
2214 * tscrollup would work here, but we can optimize to
2215 * memmove because we're freeing the earlier lines
2216 */
2217 for(/* i = 0 */; i < slide; i++) {
2218 free(term.line[i]);
2219 free(term.alt[i]);
2220 }
2221 memmove(term.line, term.line + slide, row * sizeof(Line));
2222 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2223 }
2224 for(i += row; i < term.row; i++) {
2225 free(term.line[i]);
2226 free(term.alt[i]);
2227 }
2228
2229 /* resize to new height */
2230 term.line = xrealloc(term.line, row * sizeof(Line));
2231 term.alt = xrealloc(term.alt, row * sizeof(Line));
2232 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2233 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2234
2235 /* resize each row to new width, zero-pad if needed */
2236 for(i = 0; i < minrow; i++) {
2237 term.dirty[i] = 1;
2238 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2239 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2240 for(x = mincol; x < col; x++) {
2241 term.line[i][x].state = 0;
2242 term.alt[i][x].state = 0;
2243 }
2244 }
2245
2246 /* allocate any new rows */
2247 for(/* i == minrow */; i < row; i++) {
2248 term.dirty[i] = 1;
2249 term.line[i] = xcalloc(col, sizeof(Glyph));
2250 term.alt [i] = xcalloc(col, sizeof(Glyph));
2251 }
2252 if(col > term.col) {
2253 bp = term.tabs + term.col;
2254
2255 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2256 while(--bp > term.tabs && !*bp)
2257 /* nothing */ ;
2258 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2259 *bp = 1;
2260 }
2261 /* update terminal size */
2262 term.col = col;
2263 term.row = row;
2264 /* reset scrolling region */
2265 tsetscroll(0, row-1);
2266 /* make use of the LIMIT in tmoveto */
2267 tmoveto(term.c.x, term.c.y);
2268
2269 return (slide > 0);
2270 }
2271
2272 void
2273 xresize(int col, int row) {
2274 xw.tw = MAX(1, col * xw.cw);
2275 xw.th = MAX(1, row * xw.ch);
2276
2277 if(!usedbe) {
2278 XFreePixmap(xw.dpy, xw.buf);
2279 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2280 DefaultDepth(xw.dpy, xw.scr));
2281 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg].pixel);
2282 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2283 }
2284
2285 XftDrawChange(xw.draw, xw.buf);
2286 }
2287
2288 void
2289 xloadcols(void) {
2290 int i, r, g, b;
2291 XRenderColor color = { .alpha = 0xffff };
2292
2293 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2294 for(i = 0; i < LEN(colorname); i++) {
2295 if(!colorname[i])
2296 continue;
2297 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2298 die("Could not allocate color '%s'\n", colorname[i]);
2299 }
2300 }
2301
2302 /* load colors [16-255] ; same colors as xterm */
2303 for(i = 16, r = 0; r < 6; r++) {
2304 for(g = 0; g < 6; g++) {
2305 for(b = 0; b < 6; b++) {
2306 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
2307 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
2308 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
2309 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2310 die("Could not allocate color %d\n", i);
2311 }
2312 i++;
2313 }
2314 }
2315 }
2316
2317 for(r = 0; r < 24; r++, i++) {
2318 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2319 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2320 &dc.col[i])) {
2321 die("Could not allocate color %d\n", i);
2322 }
2323 }
2324 }
2325
2326 void
2327 xtermclear(int col1, int row1, int col2, int row2) {
2328 XftDrawRect(xw.draw,
2329 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2330 borderpx + col1 * xw.cw,
2331 borderpx + row1 * xw.ch,
2332 (col2-col1+1) * xw.cw,
2333 (row2-row1+1) * xw.ch);
2334 }
2335
2336 /*
2337 * Absolute coordinates.
2338 */
2339 void
2340 xclear(int x1, int y1, int x2, int y2) {
2341 XftDrawRect(xw.draw,
2342 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2343 x1, y1, x2-x1, y2-y1);
2344 }
2345
2346 void
2347 xhints(void) {
2348 XClassHint class = {opt_class ? opt_class : termname, termname};
2349 XWMHints wm = {.flags = InputHint, .input = 1};
2350 XSizeHints *sizeh = NULL;
2351
2352 sizeh = XAllocSizeHints();
2353 if(xw.isfixed == False) {
2354 sizeh->flags = PSize | PResizeInc | PBaseSize;
2355 sizeh->height = xw.h;
2356 sizeh->width = xw.w;
2357 sizeh->height_inc = xw.ch;
2358 sizeh->width_inc = xw.cw;
2359 sizeh->base_height = 2 * borderpx;
2360 sizeh->base_width = 2 * borderpx;
2361 } else {
2362 sizeh->flags = PMaxSize | PMinSize;
2363 sizeh->min_width = sizeh->max_width = xw.fw;
2364 sizeh->min_height = sizeh->max_height = xw.fh;
2365 }
2366
2367 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2368 XFree(sizeh);
2369 }
2370
2371 int
2372 xloadfont(Font *f, FcPattern *pattern) {
2373 FcPattern *match;
2374 FcResult result;
2375
2376 match = FcFontMatch(NULL, pattern, &result);
2377 if(!match)
2378 return 1;
2379
2380 if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
2381 FcPatternDestroy(match);
2382 return 1;
2383 }
2384
2385 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2386 FcPatternDestroy(match);
2387 return 1;
2388 }
2389
2390 f->pattern = FcPatternDuplicate(pattern);
2391
2392 f->ascent = f->match->ascent;
2393 f->descent = f->match->descent;
2394 f->lbearing = 0;
2395 f->rbearing = f->match->max_advance_width;
2396
2397 f->height = f->match->height;
2398 f->width = f->lbearing + f->rbearing;
2399
2400 return 0;
2401 }
2402
2403 void
2404 xloadfonts(char *fontstr, int fontsize) {
2405 FcPattern *pattern;
2406 FcResult result;
2407 double fontval;
2408
2409 if(fontstr[0] == '-') {
2410 pattern = XftXlfdParse(fontstr, False, False);
2411 } else {
2412 pattern = FcNameParse((FcChar8 *)fontstr);
2413 }
2414
2415 if(!pattern)
2416 die("st: can't open font %s\n", fontstr);
2417
2418 if(fontsize > 0) {
2419 FcPatternDel(pattern, FC_PIXEL_SIZE);
2420 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2421 usedfontsize = fontsize;
2422 } else {
2423 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2424 if(result == FcResultMatch) {
2425 usedfontsize = (int)fontval;
2426 } else {
2427 /*
2428 * Default font size is 12, if none given. This is to
2429 * have a known usedfontsize value.
2430 */
2431 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2432 usedfontsize = 12;
2433 }
2434 }
2435
2436 FcConfigSubstitute(0, pattern, FcMatchPattern);
2437 FcDefaultSubstitute(pattern);
2438
2439 if(xloadfont(&dc.font, pattern))
2440 die("st: can't open font %s\n", fontstr);
2441
2442 /* Setting character width and height. */
2443 xw.cw = dc.font.width;
2444 xw.ch = dc.font.height;
2445
2446 FcPatternDel(pattern, FC_SLANT);
2447 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2448 if(xloadfont(&dc.ifont, pattern))
2449 die("st: can't open font %s\n", fontstr);
2450
2451 FcPatternDel(pattern, FC_WEIGHT);
2452 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2453 if(xloadfont(&dc.ibfont, pattern))
2454 die("st: can't open font %s\n", fontstr);
2455
2456 FcPatternDel(pattern, FC_SLANT);
2457 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2458 if(xloadfont(&dc.bfont, pattern))
2459 die("st: can't open font %s\n", fontstr);
2460
2461 FcPatternDestroy(pattern);
2462 }
2463
2464 void
2465 xunloadfonts(void) {
2466 int i, ip;
2467
2468 /*
2469 * Free the loaded fonts in the font cache. This is done backwards
2470 * from the frccur.
2471 */
2472 for(i = 0, ip = frccur; i < frclen; i++, ip--) {
2473 if(ip < 0)
2474 ip = LEN(frc) - 1;
2475 XftFontClose(xw.dpy, frc[ip].font);
2476 }
2477 frccur = -1;
2478 frclen = 0;
2479
2480 XftFontClose(xw.dpy, dc.font.match);
2481 FcPatternDestroy(dc.font.pattern);
2482 FcFontSetDestroy(dc.font.set);
2483 XftFontClose(xw.dpy, dc.bfont.match);
2484 FcPatternDestroy(dc.bfont.pattern);
2485 FcFontSetDestroy(dc.bfont.set);
2486 XftFontClose(xw.dpy, dc.ifont.match);
2487 FcPatternDestroy(dc.ifont.pattern);
2488 FcFontSetDestroy(dc.ifont.set);
2489 XftFontClose(xw.dpy, dc.ibfont.match);
2490 FcPatternDestroy(dc.ibfont.pattern);
2491 FcFontSetDestroy(dc.ibfont.set);
2492 }
2493
2494 void
2495 xzoom(const Arg *arg) {
2496 xunloadfonts();
2497 xloadfonts(usedfont, usedfontsize + arg->i);
2498 cresize(0, 0);
2499 redraw(0);
2500 }
2501
2502 void
2503 xinit(void) {
2504 XSetWindowAttributes attrs;
2505 XGCValues gcvalues;
2506 Cursor cursor;
2507 Window parent;
2508 int sw, sh, major, minor;
2509
2510 if(!(xw.dpy = XOpenDisplay(NULL)))
2511 die("Can't open display\n");
2512 xw.scr = XDefaultScreen(xw.dpy);
2513 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2514
2515 /* font */
2516 if(!FcInit())
2517 die("Could not init fontconfig.\n");
2518
2519 usedfont = (opt_font == NULL)? font : opt_font;
2520 xloadfonts(usedfont, 0);
2521
2522 /* colors */
2523 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2524 xloadcols();
2525
2526 /* adjust fixed window geometry */
2527 if(xw.isfixed) {
2528 sw = DisplayWidth(xw.dpy, xw.scr);
2529 sh = DisplayHeight(xw.dpy, xw.scr);
2530 if(xw.fx < 0)
2531 xw.fx = sw + xw.fx - xw.fw - 1;
2532 if(xw.fy < 0)
2533 xw.fy = sh + xw.fy - xw.fh - 1;
2534
2535 xw.h = xw.fh;
2536 xw.w = xw.fw;
2537 } else {
2538 /* window - default size */
2539 xw.h = 2 * borderpx + term.row * xw.ch;
2540 xw.w = 2 * borderpx + term.col * xw.cw;
2541 xw.fx = 0;
2542 xw.fy = 0;
2543 }
2544
2545 /* Events */
2546 attrs.background_pixel = dc.col[defaultbg].pixel;
2547 attrs.border_pixel = dc.col[defaultbg].pixel;
2548 attrs.bit_gravity = NorthWestGravity;
2549 attrs.event_mask = FocusChangeMask | KeyPressMask
2550 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2551 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2552 attrs.colormap = xw.cmap;
2553
2554 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2555 XRootWindow(xw.dpy, xw.scr);
2556 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2557 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2558 xw.vis,
2559 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2560 | CWColormap,
2561 &attrs);
2562
2563 /* double buffering */
2564 /*
2565 if(XdbeQueryExtension(xw.dpy, &major, &minor)) {
2566 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win,
2567 XdbeBackground);
2568 usedbe = True;
2569 } else {
2570 */
2571 memset(&gcvalues, 0, sizeof(gcvalues));
2572 gcvalues.graphics_exposures = False;
2573 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2574 &gcvalues);
2575 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2576 DefaultDepth(xw.dpy, xw.scr));
2577 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2578 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2579 //xw.buf = xw.win;
2580 /*
2581 }
2582 */
2583
2584 /* Xft rendering context */
2585 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2586
2587 /* input methods */
2588 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2589 XSetLocaleModifiers("@im=local");
2590 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2591 XSetLocaleModifiers("@im=");
2592 if((xw.xim = XOpenIM(xw.dpy,
2593 NULL, NULL, NULL)) == NULL) {
2594 die("XOpenIM failed. Could not open input"
2595 " device.\n");
2596 }
2597 }
2598 }
2599 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2600 | XIMStatusNothing, XNClientWindow, xw.win,
2601 XNFocusWindow, xw.win, NULL);
2602 if(xw.xic == NULL)
2603 die("XCreateIC failed. Could not obtain input method.\n");
2604
2605 /* white cursor, black outline */
2606 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2607 XDefineCursor(xw.dpy, xw.win, cursor);
2608 XRecolorCursor(xw.dpy, cursor,
2609 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2610 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2611
2612 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2613 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2614 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2615
2616 xresettitle();
2617 XMapWindow(xw.dpy, xw.win);
2618 xhints();
2619 XSync(xw.dpy, 0);
2620 }
2621
2622 void
2623 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2624 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2625 width = charlen * xw.cw, xp, i;
2626 int frp, frcflags;
2627 int u8fl, u8fblen, u8cblen, doesexist;
2628 char *u8c, *u8fs;
2629 long u8char;
2630 Font *font = &dc.font;
2631 FcResult fcres;
2632 FcPattern *fcpattern, *fontpattern;
2633 FcFontSet *fcsets[] = { NULL };
2634 FcCharSet *fccharset;
2635 Colour *fg = &dc.col[base.fg], *bg = &dc.col[base.bg],
2636 *temp, revfg, revbg;
2637 XRenderColor colfg, colbg;
2638
2639 frcflags = FRC_NORMAL;
2640
2641 if(base.mode & ATTR_BOLD) {
2642 if(BETWEEN(base.fg, 0, 7)) {
2643 /* basic system colors */
2644 fg = &dc.col[base.fg + 8];
2645 } else if(BETWEEN(base.fg, 16, 195)) {
2646 /* 256 colors */
2647 fg = &dc.col[base.fg + 36];
2648 } else if(BETWEEN(base.fg, 232, 251)) {
2649 /* greyscale */
2650 fg = &dc.col[base.fg + 4];
2651 }
2652 /*
2653 * Those ranges will not be brightened:
2654 * 8 - 15 – bright system colors
2655 * 196 - 231 – highest 256 color cube
2656 * 252 - 255 – brightest colors in greyscale
2657 */
2658 font = &dc.bfont;
2659 frcflags = FRC_BOLD;
2660 }
2661
2662 if(base.mode & ATTR_ITALIC) {
2663 font = &dc.ifont;
2664 frcflags = FRC_ITALIC;
2665 }
2666 if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2667 font = &dc.ibfont;
2668 frcflags = FRC_ITALICBOLD;
2669 }
2670
2671 if(IS_SET(MODE_REVERSE)) {
2672 if(fg == &dc.col[defaultfg]) {
2673 fg = &dc.col[defaultbg];
2674 } else {
2675 colfg.red = ~fg->color.red;
2676 colfg.green = ~fg->color.green;
2677 colfg.blue = ~fg->color.blue;
2678 colfg.alpha = fg->color.alpha;
2679 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2680 fg = &revfg;
2681 }
2682
2683 if(bg == &dc.col[defaultbg]) {
2684 bg = &dc.col[defaultfg];
2685 } else {
2686 colbg.red = ~bg->color.red;
2687 colbg.green = ~bg->color.green;
2688 colbg.blue = ~bg->color.blue;
2689 colbg.alpha = bg->color.alpha;
2690 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2691 bg = &revbg;
2692 }
2693 }
2694
2695 if(base.mode & ATTR_REVERSE) {
2696 temp = fg;
2697 fg = bg;
2698 bg = temp;
2699 }
2700
2701 /* Intelligent cleaning up of the borders. */
2702 if(x == 0) {
2703 xclear(0, (y == 0)? 0 : winy, borderpx,
2704 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2705 }
2706 if(x + charlen >= term.col) {
2707 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2708 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2709 }
2710 if(y == 0)
2711 xclear(winx, 0, winx + width, borderpx);
2712 if(y == term.row-1)
2713 xclear(winx, winy + xw.ch, winx + width, xw.h);
2714
2715 /* Clean up the region we want to draw to. */
2716 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2717
2718 fcsets[0] = font->set;
2719 for(xp = winx; bytelen > 0;) {
2720 /*
2721 * Search for the range in the to be printed string of glyphs
2722 * that are in the main font. Then print that range. If
2723 * some glyph is found that is not in the font, do the
2724 * fallback dance.
2725 */
2726 u8fs = s;
2727 u8fblen = 0;
2728 u8fl = 0;
2729 for(;;) {
2730 u8c = s;
2731 u8cblen = utf8decode(s, &u8char);
2732 s += u8cblen;
2733 bytelen -= u8cblen;
2734
2735 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
2736 if(!doesexist || bytelen <= 0) {
2737 if(bytelen <= 0) {
2738 if(doesexist) {
2739 u8fl++;
2740 u8fblen += u8cblen;
2741 }
2742 }
2743
2744 if(u8fl > 0) {
2745 XftDrawStringUtf8(xw.draw, fg,
2746 font->match, xp,
2747 winy + font->ascent,
2748 (FcChar8 *)u8fs,
2749 u8fblen);
2750 xp += font->width * u8fl;
2751 }
2752 break;
2753 }
2754
2755 u8fl++;
2756 u8fblen += u8cblen;
2757 }
2758 if(doesexist)
2759 break;
2760
2761 frp = frccur;
2762 /* Search the font cache. */
2763 for(i = 0; i < frclen; i++, frp--) {
2764 if(frp <= 0)
2765 frp = LEN(frc) - 1;
2766
2767 if(frc[frp].c == u8char
2768 && frc[frp].flags == frcflags) {
2769 break;
2770 }
2771 }
2772
2773 /* Nothing was found. */
2774 if(i >= frclen) {
2775 /*
2776 * Nothing was found in the cache. Now use
2777 * some dozen of Fontconfig calls to get the
2778 * font for one single character.
2779 */
2780 fcpattern = FcPatternDuplicate(font->pattern);
2781 fccharset = FcCharSetCreate();
2782
2783 FcCharSetAddChar(fccharset, u8char);
2784 FcPatternAddCharSet(fcpattern, FC_CHARSET,
2785 fccharset);
2786 FcPatternAddBool(fcpattern, FC_SCALABLE,
2787 FcTrue);
2788
2789 FcConfigSubstitute(0, fcpattern,
2790 FcMatchPattern);
2791 FcDefaultSubstitute(fcpattern);
2792
2793 fontpattern = FcFontSetMatch(0, fcsets,
2794 FcTrue, fcpattern, &fcres);
2795
2796 /*
2797 * Overwrite or create the new cache entry
2798 * entry.
2799 */
2800 frccur++;
2801 frclen++;
2802 if(frccur >= LEN(frc))
2803 frccur = 0;
2804 if(frclen > LEN(frc)) {
2805 frclen = LEN(frc);
2806 XftFontClose(xw.dpy, frc[frccur].font);
2807 }
2808
2809 frc[frccur].font = XftFontOpenPattern(xw.dpy,
2810 fontpattern);
2811 frc[frccur].c = u8char;
2812 frc[frccur].flags = frcflags;
2813
2814 FcPatternDestroy(fcpattern);
2815 FcCharSetDestroy(fccharset);
2816
2817 frp = frccur;
2818 }
2819
2820 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
2821 xp, winy + frc[frp].font->ascent,
2822 (FcChar8 *)u8c, u8cblen);
2823
2824 xp += font->width;
2825 }
2826
2827 /*
2828 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
2829 winy + font->ascent, (FcChar8 *)s, bytelen);
2830 */
2831
2832 if(base.mode & ATTR_UNDERLINE) {
2833 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
2834 width, 1);
2835 }
2836 }
2837
2838 void
2839 xdrawcursor(void) {
2840 static int oldx = 0, oldy = 0;
2841 int sl;
2842 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs, 0};
2843
2844 LIMIT(oldx, 0, term.col-1);
2845 LIMIT(oldy, 0, term.row-1);
2846
2847 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2848 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2849
2850 /* remove the old cursor */
2851 if(term.line[oldy][oldx].state & GLYPH_SET) {
2852 sl = utf8size(term.line[oldy][oldx].c);
2853 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2854 oldy, 1, sl);
2855 } else {
2856 xtermclear(oldx, oldy, oldx, oldy);
2857 }
2858
2859 /* draw the new one */
2860 if(!(IS_SET(MODE_HIDE))) {
2861 if(!(xw.state & WIN_FOCUSED))
2862 g.bg = defaultucs;
2863
2864 if(IS_SET(MODE_REVERSE))
2865 g.mode |= ATTR_REVERSE, g.fg = defaultcs, g.bg = defaultfg;
2866
2867 sl = utf8size(g.c);
2868 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2869 oldx = term.c.x, oldy = term.c.y;
2870 }
2871 }
2872
2873 void
2874 xresettitle(void) {
2875 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
2876 }
2877
2878 void
2879 redraw(int timeout) {
2880 struct timespec tv = {0, timeout * 1000};
2881
2882 tfulldirt();
2883 draw();
2884
2885 if(timeout > 0) {
2886 nanosleep(&tv, NULL);
2887 XSync(xw.dpy, False); /* necessary for a good tput flash */
2888 }
2889 }
2890
2891 void
2892 draw(void) {
2893 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2894
2895 drawregion(0, 0, term.col, term.row);
2896 if(usedbe) {
2897 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2898 } else {
2899 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
2900 xw.h, 0, 0);
2901 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg].pixel);
2902 }
2903 }
2904
2905 void
2906 drawregion(int x1, int y1, int x2, int y2) {
2907 int ic, ib, x, y, ox, sl;
2908 Glyph base, new;
2909 char buf[DRAW_BUF_SIZ];
2910 bool ena_sel = sel.bx != -1;
2911
2912 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
2913 ena_sel = 0;
2914
2915 if(!(xw.state & WIN_VISIBLE))
2916 return;
2917
2918 for(y = y1; y < y2; y++) {
2919 if(!term.dirty[y])
2920 continue;
2921
2922 xtermclear(0, y, term.col, y);
2923 term.dirty[y] = 0;
2924 base = term.line[y][0];
2925 ic = ib = ox = 0;
2926 for(x = x1; x < x2; x++) {
2927 new = term.line[y][x];
2928 if(ena_sel && *(new.c) && selected(x, y))
2929 new.mode ^= ATTR_REVERSE;
2930 if(ib > 0 && (!(new.state & GLYPH_SET)
2931 || ATTRCMP(base, new)
2932 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2933 xdraws(buf, base, ox, y, ic, ib);
2934 ic = ib = 0;
2935 }
2936 if(new.state & GLYPH_SET) {
2937 if(ib == 0) {
2938 ox = x;
2939 base = new;
2940 }
2941
2942 sl = utf8size(new.c);
2943 memcpy(buf+ib, new.c, sl);
2944 ib += sl;
2945 ++ic;
2946 }
2947 }
2948 if(ib > 0)
2949 xdraws(buf, base, ox, y, ic, ib);
2950 }
2951 xdrawcursor();
2952 }
2953
2954 void
2955 expose(XEvent *ev) {
2956 XExposeEvent *e = &ev->xexpose;
2957
2958 if(xw.state & WIN_REDRAW) {
2959 if(!e->count)
2960 xw.state &= ~WIN_REDRAW;
2961 }
2962 redraw(0);
2963 }
2964
2965 void
2966 visibility(XEvent *ev) {
2967 XVisibilityEvent *e = &ev->xvisibility;
2968
2969 if(e->state == VisibilityFullyObscured) {
2970 xw.state &= ~WIN_VISIBLE;
2971 } else if(!(xw.state & WIN_VISIBLE)) {
2972 /* need a full redraw for next Expose, not just a buf copy */
2973 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2974 }
2975 }
2976
2977 void
2978 unmap(XEvent *ev) {
2979 xw.state &= ~WIN_VISIBLE;
2980 }
2981
2982 void
2983 xseturgency(int add) {
2984 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2985
2986 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2987 XSetWMHints(xw.dpy, xw.win, h);
2988 XFree(h);
2989 }
2990
2991 void
2992 focus(XEvent *ev) {
2993 XFocusChangeEvent *e = &ev->xfocus;
2994
2995 if(e->mode == NotifyGrab)
2996 return;
2997
2998 if(ev->type == FocusIn) {
2999 XSetICFocus(xw.xic);
3000 xw.state |= WIN_FOCUSED;
3001 xseturgency(0);
3002 } else {
3003 XUnsetICFocus(xw.xic);
3004 xw.state &= ~WIN_FOCUSED;
3005 }
3006 }
3007
3008 inline bool
3009 match(uint mask, uint state) {
3010 state &= ~(ignoremod);
3011
3012 if(mask == XK_NO_MOD && state)
3013 return false;
3014 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3015 return false;
3016 if((state & mask) != state)
3017 return false;
3018 return true;
3019 }
3020
3021 void
3022 numlock(const Arg *dummy) {
3023 term.numlock ^= 1;
3024 }
3025
3026 char*
3027 kmap(KeySym k, uint state) {
3028 uint mask;
3029 Key *kp;
3030 int i;
3031
3032 /* Check for mapped keys out of X11 function keys. */
3033 for(i = 0; i < LEN(mappedkeys); i++) {
3034 if(mappedkeys[i] == k)
3035 break;
3036 }
3037 if(i == LEN(mappedkeys)) {
3038 if((k & 0xFFFF) < 0xFD00)
3039 return NULL;
3040 }
3041
3042 for(kp = key; kp < key + LEN(key); kp++) {
3043 mask = kp->mask;
3044
3045 if(kp->k != k)
3046 continue;
3047
3048 if(!match(mask, state))
3049 continue;
3050
3051 if(kp->appkey > 0) {
3052 if(!IS_SET(MODE_APPKEYPAD))
3053 continue;
3054 if(term.numlock && kp->appkey == 2)
3055 continue;
3056 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3057 continue;
3058 }
3059
3060 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3061 (kp->appcursor > 0
3062 && !IS_SET(MODE_APPCURSOR))) {
3063 continue;
3064 }
3065
3066 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3067 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3068 continue;
3069 }
3070
3071 return kp->s;
3072 }
3073
3074 return NULL;
3075 }
3076
3077 void
3078 kpress(XEvent *ev) {
3079 XKeyEvent *e = &ev->xkey;
3080 KeySym ksym;
3081 char xstr[31], buf[32], *customkey, *cp = buf;
3082 int len;
3083 Status status;
3084 Shortcut *bp;
3085
3086 if(IS_SET(MODE_KBDLOCK))
3087 return;
3088
3089 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3090 e->state &= ~Mod2Mask;
3091 /* 1. shortcuts */
3092 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3093 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3094 bp->func(&(bp->arg));
3095 return;
3096 }
3097 }
3098
3099 /* 2. custom keys from config.h */
3100 if((customkey = kmap(ksym, e->state))) {
3101 len = strlen(customkey);
3102 memcpy(buf, customkey, len);
3103 /* 2. hardcoded (overrides X lookup) */
3104 } else {
3105 if(len == 0)
3106 return;
3107
3108 if(len == 1 && e->state & Mod1Mask)
3109 *cp++ = '\033';
3110
3111 memcpy(cp, xstr, len);
3112 len = cp - buf + len;
3113 }
3114
3115 ttywrite(buf, len);
3116 if(IS_SET(MODE_ECHO))
3117 techo(buf, len);
3118 }
3119
3120
3121 void
3122 cmessage(XEvent *e) {
3123 /*
3124 * See xembed specs
3125 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3126 */
3127 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3128 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3129 xw.state |= WIN_FOCUSED;
3130 xseturgency(0);
3131 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3132 xw.state &= ~WIN_FOCUSED;
3133 }
3134 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3135 /* Send SIGHUP to shell */
3136 kill(pid, SIGHUP);
3137 exit(EXIT_SUCCESS);
3138 }
3139 }
3140
3141 void
3142 cresize(int width, int height) {
3143 int col, row;
3144
3145 if(width != 0)
3146 xw.w = width;
3147 if(height != 0)
3148 xw.h = height;
3149
3150 col = (xw.w - 2 * borderpx) / xw.cw;
3151 row = (xw.h - 2 * borderpx) / xw.ch;
3152
3153 tresize(col, row);
3154 xresize(col, row);
3155 ttyresize();
3156 }
3157
3158 void
3159 resize(XEvent *e) {
3160 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3161 return;
3162
3163 cresize(e->xconfigure.width, e->xconfigure.height);
3164 }
3165
3166 void
3167 run(void) {
3168 XEvent ev;
3169 fd_set rfd;
3170 int xfd = XConnectionNumber(xw.dpy), xev;
3171 struct timeval drawtimeout, *tv = NULL, now, last;
3172
3173 gettimeofday(&last, NULL);
3174
3175 for(xev = actionfps;;) {
3176 FD_ZERO(&rfd);
3177 FD_SET(cmdfd, &rfd);
3178 FD_SET(xfd, &rfd);
3179 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3180 if(errno == EINTR)
3181 continue;
3182 die("select failed: %s\n", SERRNO);
3183 }
3184
3185 gettimeofday(&now, NULL);
3186 drawtimeout.tv_sec = 0;
3187 drawtimeout.tv_usec = (1000/xfps) * 1000;
3188 tv = &drawtimeout;
3189
3190 if(FD_ISSET(cmdfd, &rfd))
3191 ttyread();
3192
3193 if(FD_ISSET(xfd, &rfd))
3194 xev = actionfps;
3195
3196 if(TIMEDIFF(now, last) > \
3197 (xev ? (1000/xfps) : (1000/actionfps))) {
3198 while(XPending(xw.dpy)) {
3199 XNextEvent(xw.dpy, &ev);
3200 if(XFilterEvent(&ev, None))
3201 continue;
3202 if(handler[ev.type])
3203 (handler[ev.type])(&ev);
3204 }
3205
3206 draw();
3207 XFlush(xw.dpy);
3208 last = now;
3209
3210 if(xev && !FD_ISSET(xfd, &rfd))
3211 xev--;
3212 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd))
3213 tv = NULL;
3214 }
3215 }
3216 }
3217
3218 int
3219 main(int argc, char *argv[]) {
3220 int i, bitm, xr, yr;
3221 uint wr, hr;
3222
3223 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3224 xw.isfixed = False;
3225
3226 for(i = 1; i < argc; i++) {
3227 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
3228 case 'c':
3229 if(++i < argc)
3230 opt_class = argv[i];
3231 break;
3232 case 'e':
3233 /* eat all remaining arguments */
3234 if(++i < argc)
3235 opt_cmd = &argv[i];
3236 goto run;
3237 case 'f':
3238 if(++i < argc)
3239 opt_font = argv[i];
3240 break;
3241 case 'g':
3242 if(++i >= argc)
3243 break;
3244
3245 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
3246 if(bitm & XValue)
3247 xw.fx = xr;
3248 if(bitm & YValue)
3249 xw.fy = yr;
3250 if(bitm & WidthValue)
3251 xw.fw = (int)wr;
3252 if(bitm & HeightValue)
3253 xw.fh = (int)hr;
3254 if(bitm & XNegative && xw.fx == 0)
3255 xw.fx = -1;
3256 if(bitm & XNegative && xw.fy == 0)
3257 xw.fy = -1;
3258
3259 if(xw.fh != 0 && xw.fw != 0)
3260 xw.isfixed = True;
3261 break;
3262 case 'o':
3263 if(++i < argc)
3264 opt_io = argv[i];
3265 break;
3266 case 't':
3267 if(++i < argc)
3268 opt_title = argv[i];
3269 break;
3270 case 'v':
3271 default:
3272 die(USAGE);
3273 case 'w':
3274 if(++i < argc)
3275 opt_embed = argv[i];
3276 break;
3277 }
3278 }
3279
3280 run:
3281 setlocale(LC_CTYPE, "");
3282 XSetLocaleModifiers("");
3283 tnew(80, 24);
3284 xinit();
3285 ttynew();
3286 selinit();
3287 run();
3288
3289 return 0;
3290 }
3291