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7ae9d8c6f7a0fa86ea2c7df67bd15e804cf45f26
[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 <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <sys/ioctl.h>
15 #include <sys/select.h>
16 #include <sys/stat.h>
17 #include <sys/time.h>
18 #include <sys/types.h>
19 #include <sys/wait.h>
20 #include <time.h>
21 #include <unistd.h>
22 #include <X11/Xatom.h>
23 #include <X11/Xlib.h>
24 #include <X11/Xutil.h>
25 #include <X11/cursorfont.h>
26 #include <X11/keysym.h>
27 #include <X11/extensions/Xdbe.h>
28 #include <X11/Xft/Xft.h>
29 #include <fontconfig/fontconfig.h>
30 #define Glyph Glyph_
31 #define Font Font_
32
33 #if defined(__linux)
34 #include <pty.h>
35 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
36 #include <util.h>
37 #elif defined(__FreeBSD__) || defined(__DragonFly__)
38 #include <libutil.h>
39 #endif
40
41 #define USAGE \
42 "st " VERSION " (c) 2010-2012 st engineers\n" \
43 "usage: st [-v] [-c class] [-f font] [-g geometry] [-o file]" \
44 " [-t title] [-w windowid] [-e command ...]\n"
45
46 /* XEMBED messages */
47 #define XEMBED_FOCUS_IN 4
48 #define XEMBED_FOCUS_OUT 5
49
50 /* Arbitrary sizes */
51 #define ESC_BUF_SIZ 256
52 #define ESC_ARG_SIZ 16
53 #define STR_BUF_SIZ 256
54 #define STR_ARG_SIZ 16
55 #define DRAW_BUF_SIZ 20*1024
56 #define UTF_SIZ 4
57 #define XK_NO_MOD UINT_MAX
58 #define XK_ANY_MOD 0
59
60 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
61
62 #define SERRNO strerror(errno)
63 #define MIN(a, b) ((a) < (b) ? (a) : (b))
64 #define MAX(a, b) ((a) < (b) ? (b) : (a))
65 #define LEN(a) (sizeof(a) / sizeof(a[0]))
66 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
67 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
68 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
69 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
70 #define IS_SET(flag) (term.mode & (flag))
71 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
72 #define X2COL(x) (((x) - BORDER)/xw.cw)
73 #define Y2ROW(y) (((y) - BORDER)/xw.ch)
74
75 enum glyph_attribute {
76 ATTR_NULL = 0,
77 ATTR_REVERSE = 1,
78 ATTR_UNDERLINE = 2,
79 ATTR_BOLD = 4,
80 ATTR_GFX = 8,
81 ATTR_ITALIC = 16,
82 ATTR_BLINK = 32,
83 };
84
85 enum cursor_movement {
86 CURSOR_UP,
87 CURSOR_DOWN,
88 CURSOR_LEFT,
89 CURSOR_RIGHT,
90 CURSOR_SAVE,
91 CURSOR_LOAD
92 };
93
94 enum cursor_state {
95 CURSOR_DEFAULT = 0,
96 CURSOR_HIDE = 1,
97 CURSOR_WRAPNEXT = 2
98 };
99
100 enum glyph_state {
101 GLYPH_SET = 1,
102 GLYPH_DIRTY = 2
103 };
104
105 enum term_mode {
106 MODE_WRAP = 1,
107 MODE_INSERT = 2,
108 MODE_APPKEYPAD = 4,
109 MODE_ALTSCREEN = 8,
110 MODE_CRLF = 16,
111 MODE_MOUSEBTN = 32,
112 MODE_MOUSEMOTION = 64,
113 MODE_MOUSE = 32|64,
114 MODE_REVERSE = 128,
115 MODE_KBDLOCK = 256
116 };
117
118 enum escape_state {
119 ESC_START = 1,
120 ESC_CSI = 2,
121 ESC_STR = 4, /* DSC, OSC, PM, APC */
122 ESC_ALTCHARSET = 8,
123 ESC_STR_END = 16, /* a final string was encountered */
124 };
125
126 enum window_state {
127 WIN_VISIBLE = 1,
128 WIN_REDRAW = 2,
129 WIN_FOCUSED = 4
130 };
131
132 /* bit macro */
133 #undef B0
134 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
135
136 typedef unsigned char uchar;
137 typedef unsigned int uint;
138 typedef unsigned long ulong;
139 typedef unsigned short ushort;
140
141 typedef struct {
142 char c[UTF_SIZ]; /* character code */
143 uchar mode; /* attribute flags */
144 ushort fg; /* foreground */
145 ushort bg; /* background */
146 uchar state; /* state flags */
147 } Glyph;
148
149 typedef Glyph* Line;
150
151 typedef struct {
152 Glyph attr; /* current char attributes */
153 int x;
154 int y;
155 char state;
156 } TCursor;
157
158 /* CSI Escape sequence structs */
159 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
160 typedef struct {
161 char buf[ESC_BUF_SIZ]; /* raw string */
162 int len; /* raw string length */
163 char priv;
164 int arg[ESC_ARG_SIZ];
165 int narg; /* nb of args */
166 char mode;
167 } CSIEscape;
168
169 /* STR Escape sequence structs */
170 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
171 typedef struct {
172 char type; /* ESC type ... */
173 char buf[STR_BUF_SIZ]; /* raw string */
174 int len; /* raw string length */
175 char *args[STR_ARG_SIZ];
176 int narg; /* nb of args */
177 } STREscape;
178
179 /* Internal representation of the screen */
180 typedef struct {
181 int row; /* nb row */
182 int col; /* nb col */
183 Line* line; /* screen */
184 Line* alt; /* alternate screen */
185 bool* dirty; /* dirtyness of lines */
186 TCursor c; /* cursor */
187 int top; /* top scroll limit */
188 int bot; /* bottom scroll limit */
189 int mode; /* terminal mode flags */
190 int esc; /* escape state flags */
191 bool *tabs;
192 } Term;
193
194 /* Purely graphic info */
195 typedef struct {
196 Display* dpy;
197 Colormap cmap;
198 Window win;
199 XdbeBackBuffer buf;
200 Atom xembed;
201 XIM xim;
202 XIC xic;
203 XftDraw *xft_draw;
204 Visual *vis;
205 int scr;
206 bool isfixed; /* is fixed geometry? */
207 int fx, fy, fw, fh; /* fixed geometry */
208 int tw, th; /* tty width and height */
209 int w; /* window width */
210 int h; /* window height */
211 int ch; /* char height */
212 int cw; /* char width */
213 char state; /* focus, redraw, visible */
214 } XWindow;
215
216 typedef struct {
217 KeySym k;
218 uint mask;
219 char s[ESC_BUF_SIZ];
220 } Key;
221
222 /* TODO: use better name for vars... */
223 typedef struct {
224 int mode;
225 int bx, by;
226 int ex, ey;
227 struct {int x, y;} b, e;
228 char *clip;
229 Atom xtarget;
230 bool alt;
231 struct timeval tclick1;
232 struct timeval tclick2;
233 } Selection;
234
235 #include "config.h"
236
237 /* Font structure */
238 typedef struct {
239 int height;
240 int width;
241 int ascent;
242 int descent;
243 short lbearing;
244 short rbearing;
245 XftFont* xft_set;
246 } Font;
247
248 /* Drawing Context */
249 typedef struct {
250 XftColor xft_col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
251 GC gc;
252 Font font, bfont, ifont, ibfont;
253 } DC;
254
255 static void die(const char*, ...);
256 static void draw(void);
257 static void redraw(void);
258 static void drawregion(int, int, int, int);
259 static void execsh(void);
260 static void sigchld(int);
261 static void run(void);
262
263 static void csidump(void);
264 static void csihandle(void);
265 static void csiparse(void);
266 static void csireset(void);
267 static void strdump(void);
268 static void strhandle(void);
269 static void strparse(void);
270 static void strreset(void);
271
272 static void tclearregion(int, int, int, int);
273 static void tcursor(int);
274 static void tdeletechar(int);
275 static void tdeleteline(int);
276 static void tinsertblank(int);
277 static void tinsertblankline(int);
278 static void tmoveto(int, int);
279 static void tnew(int, int);
280 static void tnewline(int);
281 static void tputtab(bool);
282 static void tputc(char*, int);
283 static void treset(void);
284 static int tresize(int, int);
285 static void tscrollup(int, int);
286 static void tscrolldown(int, int);
287 static void tsetattr(int*, int);
288 static void tsetchar(char*);
289 static void tsetscroll(int, int);
290 static void tswapscreen(void);
291 static void tsetdirt(int, int);
292 static void tsetmode(bool, bool, int *, int);
293 static void tfulldirt(void);
294
295 static void ttynew(void);
296 static void ttyread(void);
297 static void ttyresize(void);
298 static void ttywrite(const char *, size_t);
299
300 static void xdraws(char *, Glyph, int, int, int, int);
301 static void xhints(void);
302 static void xclear(int, int, int, int);
303 static void xclearborders(void);
304 static void xdrawcursor(void);
305 static void xinit(void);
306 static void xloadcols(void);
307 static void xresettitle(void);
308 static void xseturgency(int);
309 static void xsetsel(char*);
310 static void xtermclear(int, int, int, int);
311 static void xresize(int, int);
312
313 static void expose(XEvent *);
314 static void visibility(XEvent *);
315 static void unmap(XEvent *);
316 static char* kmap(KeySym, uint);
317 static void kpress(XEvent *);
318 static void cmessage(XEvent *);
319 static void resize(XEvent *);
320 static void focus(XEvent *);
321 static void brelease(XEvent *);
322 static void bpress(XEvent *);
323 static void bmotion(XEvent *);
324 static void selnotify(XEvent *);
325 static void selclear(XEvent *);
326 static void selrequest(XEvent *);
327
328 static void selinit(void);
329 static inline bool selected(int, int);
330 static void selcopy(void);
331 static void selpaste(void);
332 static void selscroll(int, int);
333
334 static int utf8decode(char *, long *);
335 static int utf8encode(long *, char *);
336 static int utf8size(char *);
337 static int isfullutf8(char *, int);
338
339 static void *xmalloc(size_t);
340 static void *xrealloc(void *, size_t);
341 static void *xcalloc(size_t nmemb, size_t size);
342 static char *smstrcat(char *, ...);
343
344 static void (*handler[LASTEvent])(XEvent *) = {
345 [KeyPress] = kpress,
346 [ClientMessage] = cmessage,
347 [ConfigureNotify] = resize,
348 [VisibilityNotify] = visibility,
349 [UnmapNotify] = unmap,
350 [Expose] = expose,
351 [FocusIn] = focus,
352 [FocusOut] = focus,
353 [MotionNotify] = bmotion,
354 [ButtonPress] = bpress,
355 [ButtonRelease] = brelease,
356 [SelectionClear] = selclear,
357 [SelectionNotify] = selnotify,
358 [SelectionRequest] = selrequest,
359 };
360
361 /* Globals */
362 static DC dc;
363 static XWindow xw;
364 static Term term;
365 static CSIEscape csiescseq;
366 static STREscape strescseq;
367 static int cmdfd;
368 static pid_t pid;
369 static Selection sel;
370 static int iofd = -1;
371 static char **opt_cmd = NULL;
372 static char *opt_io = NULL;
373 static char *opt_title = NULL;
374 static char *opt_embed = NULL;
375 static char *opt_class = NULL;
376 static char *opt_font = NULL;
377
378 void *
379 xmalloc(size_t len) {
380 void *p = malloc(len);
381 if(!p)
382 die("Out of memory\n");
383 return p;
384 }
385
386 void *
387 xrealloc(void *p, size_t len) {
388 if((p = realloc(p, len)) == NULL)
389 die("Out of memory\n");
390 return p;
391 }
392
393 void *
394 xcalloc(size_t nmemb, size_t size) {
395 void *p = calloc(nmemb, size);
396 if(!p)
397 die("Out of memory\n");
398 return p;
399 }
400
401 char *
402 smstrcat(char *src, ...)
403 {
404 va_list fmtargs;
405 char *ret, *p, *v;
406 int len, slen, flen;
407
408 len = slen = strlen(src);
409
410 va_start(fmtargs, src);
411 for(;;) {
412 v = va_arg(fmtargs, char *);
413 if(v == NULL)
414 break;
415 len += strlen(v);
416 }
417 va_end(fmtargs);
418
419 p = ret = xmalloc(len+1);
420 memmove(p, src, slen);
421 p += slen;
422
423 va_start(fmtargs, src);
424 for(;;) {
425 v = va_arg(fmtargs, char *);
426 if(v == NULL)
427 break;
428 flen = strlen(v);
429 memmove(p, v, flen);
430 p += flen;
431 }
432 va_end(fmtargs);
433
434 ret[len] = '\0';
435
436 return ret;
437 }
438
439 int
440 utf8decode(char *s, long *u) {
441 uchar c;
442 int i, n, rtn;
443
444 rtn = 1;
445 c = *s;
446 if(~c & B7) { /* 0xxxxxxx */
447 *u = c;
448 return rtn;
449 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
450 *u = c&(B4|B3|B2|B1|B0);
451 n = 1;
452 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
453 *u = c&(B3|B2|B1|B0);
454 n = 2;
455 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
456 *u = c & (B2|B1|B0);
457 n = 3;
458 } else
459 goto invalid;
460 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
461 c = *s;
462 if((c & (B7|B6)) != B7) /* 10xxxxxx */
463 goto invalid;
464 *u <<= 6;
465 *u |= c & (B5|B4|B3|B2|B1|B0);
466 }
467 if((n == 1 && *u < 0x80) ||
468 (n == 2 && *u < 0x800) ||
469 (n == 3 && *u < 0x10000) ||
470 (*u >= 0xD800 && *u <= 0xDFFF))
471 goto invalid;
472 return rtn;
473 invalid:
474 *u = 0xFFFD;
475 return rtn;
476 }
477
478 int
479 utf8encode(long *u, char *s) {
480 uchar *sp;
481 ulong uc;
482 int i, n;
483
484 sp = (uchar*) s;
485 uc = *u;
486 if(uc < 0x80) {
487 *sp = uc; /* 0xxxxxxx */
488 return 1;
489 } else if(*u < 0x800) {
490 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
491 n = 1;
492 } else if(uc < 0x10000) {
493 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
494 n = 2;
495 } else if(uc <= 0x10FFFF) {
496 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
497 n = 3;
498 } else {
499 goto invalid;
500 }
501 for(i=n,++sp; i>0; --i,++sp)
502 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
503 return n+1;
504 invalid:
505 /* U+FFFD */
506 *s++ = '\xEF';
507 *s++ = '\xBF';
508 *s = '\xBD';
509 return 3;
510 }
511
512 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
513 UTF-8 otherwise return 0 */
514 int
515 isfullutf8(char *s, int b) {
516 uchar *c1, *c2, *c3;
517
518 c1 = (uchar *) s;
519 c2 = (uchar *) ++s;
520 c3 = (uchar *) ++s;
521 if(b < 1)
522 return 0;
523 else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
524 return 0;
525 else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
526 ((b == 1) ||
527 ((b == 2) && (*c2&(B7|B6)) == B7)))
528 return 0;
529 else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
530 ((b == 1) ||
531 ((b == 2) && (*c2&(B7|B6)) == B7) ||
532 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7)))
533 return 0;
534 else
535 return 1;
536 }
537
538 int
539 utf8size(char *s) {
540 uchar c = *s;
541
542 if(~c&B7)
543 return 1;
544 else if((c&(B7|B6|B5)) == (B7|B6))
545 return 2;
546 else if((c&(B7|B6|B5|B4)) == (B7|B6|B5))
547 return 3;
548 else
549 return 4;
550 }
551
552 void
553 selinit(void) {
554 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
555 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
556 sel.mode = 0;
557 sel.bx = -1;
558 sel.clip = NULL;
559 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
560 if(sel.xtarget == None)
561 sel.xtarget = XA_STRING;
562 }
563
564 static inline bool
565 selected(int x, int y) {
566 if(sel.ey == y && sel.by == y) {
567 int bx = MIN(sel.bx, sel.ex);
568 int ex = MAX(sel.bx, sel.ex);
569 return BETWEEN(x, bx, ex);
570 }
571 return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
572 || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
573 }
574
575 void
576 getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
577 if(b)
578 *b = e->xbutton.button;
579
580 *x = X2COL(e->xbutton.x);
581 *y = Y2ROW(e->xbutton.y);
582 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
583 sel.b.y = MIN(sel.by, sel.ey);
584 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
585 sel.e.y = MAX(sel.by, sel.ey);
586 }
587
588 void
589 mousereport(XEvent *e) {
590 int x = X2COL(e->xbutton.x);
591 int y = Y2ROW(e->xbutton.y);
592 int button = e->xbutton.button;
593 int state = e->xbutton.state;
594 char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
595 static int ob, ox, oy;
596
597 /* from urxvt */
598 if(e->xbutton.type == MotionNotify) {
599 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
600 return;
601 button = ob + 32;
602 ox = x, oy = y;
603 } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
604 button = 3;
605 } else {
606 button -= Button1;
607 if(button >= 3)
608 button += 64 - 3;
609 if(e->xbutton.type == ButtonPress) {
610 ob = button;
611 ox = x, oy = y;
612 }
613 }
614
615 buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
616 + (state & Mod4Mask ? 8 : 0)
617 + (state & ControlMask ? 16 : 0);
618
619 ttywrite(buf, sizeof(buf));
620 }
621
622 void
623 bpress(XEvent *e) {
624 if(IS_SET(MODE_MOUSE))
625 mousereport(e);
626 else if(e->xbutton.button == Button1) {
627 if(sel.bx != -1) {
628 sel.bx = -1;
629 tsetdirt(sel.b.y, sel.e.y);
630 draw();
631 }
632 sel.mode = 1;
633 sel.ex = sel.bx = X2COL(e->xbutton.x);
634 sel.ey = sel.by = Y2ROW(e->xbutton.y);
635 }
636 }
637
638 void
639 selcopy(void) {
640 char *str, *ptr;
641 int x, y, bufsize, is_selected = 0;
642
643 if(sel.bx == -1)
644 str = NULL;
645
646 else {
647 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
648 ptr = str = xmalloc(bufsize);
649
650 /* append every set & selected glyph to the selection */
651 for(y = 0; y < term.row; y++) {
652 for(x = 0; x < term.col; x++) {
653 int size;
654 char *p;
655 Glyph *gp = &term.line[y][x];
656
657 if(!(is_selected = selected(x, y)))
658 continue;
659 p = (gp->state & GLYPH_SET) ? gp->c : " ";
660 size = utf8size(p);
661 memcpy(ptr, p, size);
662 ptr += size;
663 }
664 /* \n at the end of every selected line except for the last one */
665 if(is_selected && y < sel.e.y)
666 *ptr++ = '\n';
667 }
668 *ptr = 0;
669 }
670 sel.alt = IS_SET(MODE_ALTSCREEN);
671 xsetsel(str);
672 }
673
674 void
675 selnotify(XEvent *e) {
676 ulong nitems, ofs, rem;
677 int format;
678 uchar *data;
679 Atom type;
680
681 ofs = 0;
682 do {
683 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
684 False, AnyPropertyType, &type, &format,
685 &nitems, &rem, &data)) {
686 fprintf(stderr, "Clipboard allocation failed\n");
687 return;
688 }
689 ttywrite((const char *) data, nitems * format / 8);
690 XFree(data);
691 /* number of 32-bit chunks returned */
692 ofs += nitems * format / 32;
693 } while(rem > 0);
694 }
695
696 void
697 selpaste() {
698 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY, xw.win, CurrentTime);
699 }
700
701 void selclear(XEvent *e) {
702 if(sel.bx == -1)
703 return;
704 sel.bx = -1;
705 tsetdirt(sel.b.y, sel.e.y);
706 }
707
708 void
709 selrequest(XEvent *e) {
710 XSelectionRequestEvent *xsre;
711 XSelectionEvent xev;
712 Atom xa_targets;
713
714 xsre = (XSelectionRequestEvent *) e;
715 xev.type = SelectionNotify;
716 xev.requestor = xsre->requestor;
717 xev.selection = xsre->selection;
718 xev.target = xsre->target;
719 xev.time = xsre->time;
720 /* reject */
721 xev.property = None;
722
723 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
724 if(xsre->target == xa_targets) {
725 /* respond with the supported type */
726 Atom string = sel.xtarget;
727 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
728 XA_ATOM, 32, PropModeReplace,
729 (uchar *) &string, 1);
730 xev.property = xsre->property;
731 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
732 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
733 xsre->target, 8, PropModeReplace,
734 (uchar *) sel.clip, strlen(sel.clip));
735 xev.property = xsre->property;
736 }
737
738 /* all done, send a notification to the listener */
739 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
740 fprintf(stderr, "Error sending SelectionNotify event\n");
741 }
742
743 void
744 xsetsel(char *str) {
745 /* register the selection for both the clipboard and the primary */
746 Atom clipboard;
747
748 free(sel.clip);
749 sel.clip = str;
750
751 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
752
753 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
754 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
755 }
756
757 void
758 brelease(XEvent *e) {
759 if(IS_SET(MODE_MOUSE)) {
760 mousereport(e);
761 return;
762 }
763 if(e->xbutton.button == Button2)
764 selpaste();
765 else if(e->xbutton.button == Button1) {
766 sel.mode = 0;
767 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
768 term.dirty[sel.ey] = 1;
769 if(sel.bx == sel.ex && sel.by == sel.ey) {
770 struct timeval now;
771 sel.bx = -1;
772 gettimeofday(&now, NULL);
773
774 if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
775 /* triple click on the line */
776 sel.b.x = sel.bx = 0;
777 sel.e.x = sel.ex = term.col;
778 sel.b.y = sel.e.y = sel.ey;
779 selcopy();
780 } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
781 /* double click to select word */
782 sel.bx = sel.ex;
783 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
784 term.line[sel.ey][sel.bx-1].c[0] != ' ') sel.bx--;
785 sel.b.x = sel.bx;
786 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
787 term.line[sel.ey][sel.ex+1].c[0] != ' ') sel.ex++;
788 sel.e.x = sel.ex;
789 sel.b.y = sel.e.y = sel.ey;
790 selcopy();
791 }
792 } else
793 selcopy();
794 }
795 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
796 gettimeofday(&sel.tclick1, NULL);
797 }
798
799 void
800 bmotion(XEvent *e) {
801 if(IS_SET(MODE_MOUSE)) {
802 mousereport(e);
803 return;
804 }
805 if(sel.mode) {
806 int oldey = sel.ey, oldex = sel.ex;
807 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
808
809 if(oldey != sel.ey || oldex != sel.ex) {
810 int starty = MIN(oldey, sel.ey);
811 int endy = MAX(oldey, sel.ey);
812 tsetdirt(starty, endy);
813 }
814 }
815 }
816
817 void
818 die(const char *errstr, ...) {
819 va_list ap;
820
821 va_start(ap, errstr);
822 vfprintf(stderr, errstr, ap);
823 va_end(ap);
824 exit(EXIT_FAILURE);
825 }
826
827 void
828 execsh(void) {
829 char **args;
830 char *envshell = getenv("SHELL");
831
832 unsetenv("COLUMNS");
833 unsetenv("LINES");
834 unsetenv("TERMCAP");
835
836 signal(SIGCHLD, SIG_DFL);
837 signal(SIGHUP, SIG_DFL);
838 signal(SIGINT, SIG_DFL);
839 signal(SIGQUIT, SIG_DFL);
840 signal(SIGTERM, SIG_DFL);
841 signal(SIGALRM, SIG_DFL);
842
843 DEFAULT(envshell, SHELL);
844 putenv("TERM="TNAME);
845 args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
846 execvp(args[0], args);
847 exit(EXIT_FAILURE);
848 }
849
850 void
851 sigchld(int a) {
852 int stat = 0;
853 if(waitpid(pid, &stat, 0) < 0)
854 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
855 if(WIFEXITED(stat))
856 exit(WEXITSTATUS(stat));
857 else
858 exit(EXIT_FAILURE);
859 }
860
861 void
862 ttynew(void) {
863 int m, s;
864
865 /* seems to work fine on linux, openbsd and freebsd */
866 struct winsize w = {term.row, term.col, 0, 0};
867 if(openpty(&m, &s, NULL, NULL, &w) < 0)
868 die("openpty failed: %s\n", SERRNO);
869
870 switch(pid = fork()) {
871 case -1:
872 die("fork failed\n");
873 break;
874 case 0:
875 setsid(); /* create a new process group */
876 dup2(s, STDIN_FILENO);
877 dup2(s, STDOUT_FILENO);
878 dup2(s, STDERR_FILENO);
879 if(ioctl(s, TIOCSCTTY, NULL) < 0)
880 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
881 close(s);
882 close(m);
883 execsh();
884 break;
885 default:
886 close(s);
887 cmdfd = m;
888 signal(SIGCHLD, sigchld);
889 if(opt_io) {
890 if(!strcmp(opt_io, "-")) {
891 iofd = STDOUT_FILENO;
892 } else {
893 if((iofd = open(opt_io, O_WRONLY | O_CREAT, 0666)) < 0) {
894 fprintf(stderr, "Error opening %s:%s\n",
895 opt_io, strerror(errno));
896 }
897 }
898 }
899 }
900 }
901
902 void
903 dump(char c) {
904 static int col;
905 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
906 if(++col % 10 == 0)
907 fprintf(stderr, "\n");
908 }
909
910 void
911 ttyread(void) {
912 static char buf[BUFSIZ];
913 static int buflen = 0;
914 char *ptr;
915 char s[UTF_SIZ];
916 int charsize; /* size of utf8 char in bytes */
917 long utf8c;
918 int ret;
919
920 /* append read bytes to unprocessed bytes */
921 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
922 die("Couldn't read from shell: %s\n", SERRNO);
923
924 /* process every complete utf8 char */
925 buflen += ret;
926 ptr = buf;
927 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
928 charsize = utf8decode(ptr, &utf8c);
929 utf8encode(&utf8c, s);
930 tputc(s, charsize);
931 ptr += charsize;
932 buflen -= charsize;
933 }
934
935 /* keep any uncomplete utf8 char for the next call */
936 memmove(buf, ptr, buflen);
937 }
938
939 void
940 ttywrite(const char *s, size_t n) {
941 if(write(cmdfd, s, n) == -1)
942 die("write error on tty: %s\n", SERRNO);
943 }
944
945 void
946 ttyresize(void) {
947 struct winsize w;
948
949 w.ws_row = term.row;
950 w.ws_col = term.col;
951 w.ws_xpixel = xw.tw;
952 w.ws_ypixel = xw.th;
953 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
954 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
955 }
956
957 void
958 tsetdirt(int top, int bot)
959 {
960 int i;
961
962 LIMIT(top, 0, term.row-1);
963 LIMIT(bot, 0, term.row-1);
964
965 for(i = top; i <= bot; i++)
966 term.dirty[i] = 1;
967 }
968
969 void
970 tfulldirt(void)
971 {
972 tsetdirt(0, term.row-1);
973 }
974
975 void
976 tcursor(int mode) {
977 static TCursor c;
978
979 if(mode == CURSOR_SAVE)
980 c = term.c;
981 else if(mode == CURSOR_LOAD)
982 term.c = c, tmoveto(c.x, c.y);
983 }
984
985 void
986 treset(void) {
987 uint i;
988 term.c = (TCursor){{
989 .mode = ATTR_NULL,
990 .fg = DefaultFG,
991 .bg = DefaultBG
992 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
993
994 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
995 for(i = TAB; i < term.col; i += TAB)
996 term.tabs[i] = 1;
997 term.top = 0, term.bot = term.row - 1;
998 term.mode = MODE_WRAP;
999
1000 tclearregion(0, 0, term.col-1, term.row-1);
1001 }
1002
1003 void
1004 tnew(int col, int row) {
1005 /* set screen size */
1006 term.row = row, term.col = col;
1007 term.line = xmalloc(term.row * sizeof(Line));
1008 term.alt = xmalloc(term.row * sizeof(Line));
1009 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
1010 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
1011
1012 for(row = 0; row < term.row; row++) {
1013 term.line[row] = xmalloc(term.col * sizeof(Glyph));
1014 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
1015 term.dirty[row] = 0;
1016 }
1017 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1018 /* setup screen */
1019 treset();
1020 }
1021
1022 void
1023 tswapscreen(void) {
1024 Line* tmp = term.line;
1025 term.line = term.alt;
1026 term.alt = tmp;
1027 term.mode ^= MODE_ALTSCREEN;
1028 tfulldirt();
1029 }
1030
1031 void
1032 tscrolldown(int orig, int n) {
1033 int i;
1034 Line temp;
1035
1036 LIMIT(n, 0, term.bot-orig+1);
1037
1038 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1039
1040 for(i = term.bot; i >= orig+n; i--) {
1041 temp = term.line[i];
1042 term.line[i] = term.line[i-n];
1043 term.line[i-n] = temp;
1044
1045 term.dirty[i] = 1;
1046 term.dirty[i-n] = 1;
1047 }
1048
1049 selscroll(orig, n);
1050 }
1051
1052 void
1053 tscrollup(int orig, int n) {
1054 int i;
1055 Line temp;
1056 LIMIT(n, 0, term.bot-orig+1);
1057
1058 tclearregion(0, orig, term.col-1, orig+n-1);
1059
1060 for(i = orig; i <= term.bot-n; i++) {
1061 temp = term.line[i];
1062 term.line[i] = term.line[i+n];
1063 term.line[i+n] = temp;
1064
1065 term.dirty[i] = 1;
1066 term.dirty[i+n] = 1;
1067 }
1068
1069 selscroll(orig, -n);
1070 }
1071
1072 void
1073 selscroll(int orig, int n) {
1074 if(sel.bx == -1)
1075 return;
1076
1077 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1078 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1079 sel.bx = -1;
1080 return;
1081 }
1082 if(sel.by < term.top) {
1083 sel.by = term.top;
1084 sel.bx = 0;
1085 }
1086 if(sel.ey > term.bot) {
1087 sel.ey = term.bot;
1088 sel.ex = term.col;
1089 }
1090 sel.b.y = sel.by, sel.b.x = sel.bx;
1091 sel.e.y = sel.ey, sel.e.x = sel.ex;
1092 }
1093 }
1094
1095 void
1096 tnewline(int first_col) {
1097 int y = term.c.y;
1098 if(y == term.bot)
1099 tscrollup(term.top, 1);
1100 else
1101 y++;
1102 tmoveto(first_col ? 0 : term.c.x, y);
1103 }
1104
1105 void
1106 csiparse(void) {
1107 /* int noarg = 1; */
1108 char *p = csiescseq.buf;
1109
1110 csiescseq.narg = 0;
1111 if(*p == '?')
1112 csiescseq.priv = 1, p++;
1113
1114 while(p < csiescseq.buf+csiescseq.len) {
1115 while(isdigit(*p)) {
1116 csiescseq.arg[csiescseq.narg] *= 10;
1117 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1118 }
1119 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ)
1120 csiescseq.narg++, p++;
1121 else {
1122 csiescseq.mode = *p;
1123 csiescseq.narg++;
1124 return;
1125 }
1126 }
1127 }
1128
1129 void
1130 tmoveto(int x, int y) {
1131 LIMIT(x, 0, term.col-1);
1132 LIMIT(y, 0, term.row-1);
1133 term.c.state &= ~CURSOR_WRAPNEXT;
1134 term.c.x = x;
1135 term.c.y = y;
1136 }
1137
1138 void
1139 tsetchar(char *c) {
1140 /*
1141 * The table is proudly stolen from rxvt.
1142 */
1143 if(term.c.attr.mode & ATTR_GFX) {
1144 char *vt100_0[62] = { /* 0x41 - 0x7e */
1145 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1146 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1147 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1148 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1149 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1150 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1151 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1152 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1153 };
1154
1155 if(c[0] >= 0x41 && c[0] <= 0x7e
1156 && vt100_0[c[0] - 0x41]) {
1157 c = vt100_0[c[0] - 0x41];
1158 }
1159 }
1160
1161 term.dirty[term.c.y] = 1;
1162 term.line[term.c.y][term.c.x] = term.c.attr;
1163 memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
1164 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
1165 }
1166
1167 void
1168 tclearregion(int x1, int y1, int x2, int y2) {
1169 int x, y, temp;
1170
1171 if(x1 > x2)
1172 temp = x1, x1 = x2, x2 = temp;
1173 if(y1 > y2)
1174 temp = y1, y1 = y2, y2 = temp;
1175
1176 LIMIT(x1, 0, term.col-1);
1177 LIMIT(x2, 0, term.col-1);
1178 LIMIT(y1, 0, term.row-1);
1179 LIMIT(y2, 0, term.row-1);
1180
1181 for(y = y1; y <= y2; y++) {
1182 term.dirty[y] = 1;
1183 for(x = x1; x <= x2; x++)
1184 term.line[y][x].state = 0;
1185 }
1186 }
1187
1188 void
1189 tdeletechar(int n) {
1190 int src = term.c.x + n;
1191 int dst = term.c.x;
1192 int size = term.col - src;
1193
1194 term.dirty[term.c.y] = 1;
1195
1196 if(src >= term.col) {
1197 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1198 return;
1199 }
1200 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1201 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1202 }
1203
1204 void
1205 tinsertblank(int n) {
1206 int src = term.c.x;
1207 int dst = src + n;
1208 int size = term.col - dst;
1209
1210 term.dirty[term.c.y] = 1;
1211
1212 if(dst >= term.col) {
1213 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1214 return;
1215 }
1216 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1217 tclearregion(src, term.c.y, dst - 1, term.c.y);
1218 }
1219
1220 void
1221 tinsertblankline(int n) {
1222 if(term.c.y < term.top || term.c.y > term.bot)
1223 return;
1224
1225 tscrolldown(term.c.y, n);
1226 }
1227
1228 void
1229 tdeleteline(int n) {
1230 if(term.c.y < term.top || term.c.y > term.bot)
1231 return;
1232
1233 tscrollup(term.c.y, n);
1234 }
1235
1236 void
1237 tsetattr(int *attr, int l) {
1238 int i;
1239
1240 for(i = 0; i < l; i++) {
1241 switch(attr[i]) {
1242 case 0:
1243 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1244 | ATTR_ITALIC | ATTR_BLINK);
1245 term.c.attr.fg = DefaultFG;
1246 term.c.attr.bg = DefaultBG;
1247 break;
1248 case 1:
1249 term.c.attr.mode |= ATTR_BOLD;
1250 break;
1251 case 3: /* enter standout (highlight) */
1252 term.c.attr.mode |= ATTR_ITALIC;
1253 break;
1254 case 4:
1255 term.c.attr.mode |= ATTR_UNDERLINE;
1256 break;
1257 case 5:
1258 term.c.attr.mode |= ATTR_BLINK;
1259 break;
1260 case 7:
1261 term.c.attr.mode |= ATTR_REVERSE;
1262 break;
1263 case 21:
1264 case 22:
1265 term.c.attr.mode &= ~ATTR_BOLD;
1266 break;
1267 case 23: /* leave standout (highlight) mode */
1268 term.c.attr.mode &= ~ATTR_ITALIC;
1269 break;
1270 case 24:
1271 term.c.attr.mode &= ~ATTR_UNDERLINE;
1272 break;
1273 case 25:
1274 term.c.attr.mode &= ~ATTR_BLINK;
1275 break;
1276 case 27:
1277 term.c.attr.mode &= ~ATTR_REVERSE;
1278 break;
1279 case 38:
1280 if(i + 2 < l && attr[i + 1] == 5) {
1281 i += 2;
1282 if(BETWEEN(attr[i], 0, 255))
1283 term.c.attr.fg = attr[i];
1284 else
1285 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
1286 }
1287 else
1288 fprintf(stderr, "erresc(38): gfx attr %d unknown\n", attr[i]);
1289 break;
1290 case 39:
1291 term.c.attr.fg = DefaultFG;
1292 break;
1293 case 48:
1294 if(i + 2 < l && attr[i + 1] == 5) {
1295 i += 2;
1296 if(BETWEEN(attr[i], 0, 255))
1297 term.c.attr.bg = attr[i];
1298 else
1299 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
1300 }
1301 else
1302 fprintf(stderr, "erresc(48): gfx attr %d unknown\n", attr[i]);
1303 break;
1304 case 49:
1305 term.c.attr.bg = DefaultBG;
1306 break;
1307 default:
1308 if(BETWEEN(attr[i], 30, 37))
1309 term.c.attr.fg = attr[i] - 30;
1310 else if(BETWEEN(attr[i], 40, 47))
1311 term.c.attr.bg = attr[i] - 40;
1312 else if(BETWEEN(attr[i], 90, 97))
1313 term.c.attr.fg = attr[i] - 90 + 8;
1314 else if(BETWEEN(attr[i], 100, 107))
1315 term.c.attr.bg = attr[i] - 100 + 8;
1316 else
1317 fprintf(stderr, "erresc(default): gfx attr %d unknown\n", attr[i]), csidump();
1318 break;
1319 }
1320 }
1321 }
1322
1323 void
1324 tsetscroll(int t, int b) {
1325 int temp;
1326
1327 LIMIT(t, 0, term.row-1);
1328 LIMIT(b, 0, term.row-1);
1329 if(t > b) {
1330 temp = t;
1331 t = b;
1332 b = temp;
1333 }
1334 term.top = t;
1335 term.bot = b;
1336 }
1337
1338 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1339
1340 void
1341 tsetmode(bool priv, bool set, int *args, int narg) {
1342 int *lim, mode;
1343
1344 for(lim = args + narg; args < lim; ++args) {
1345 if(priv) {
1346 switch(*args) {
1347 break;
1348 case 1: /* DECCKM -- Cursor key */
1349 MODBIT(term.mode, set, MODE_APPKEYPAD);
1350 break;
1351 case 5: /* DECSCNM -- Reverse video */
1352 mode = term.mode;
1353 MODBIT(term.mode, set, MODE_REVERSE);
1354 if(mode != term.mode)
1355 redraw();
1356 break;
1357 case 6: /* XXX: DECOM -- Origin */
1358 break;
1359 case 7: /* DECAWM -- Auto wrap */
1360 MODBIT(term.mode, set, MODE_WRAP);
1361 break;
1362 case 8: /* XXX: DECARM -- Auto repeat */
1363 break;
1364 case 0: /* Error (IGNORED) */
1365 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1366 break;
1367 case 25:
1368 MODBIT(term.c.state, !set, CURSOR_HIDE);
1369 break;
1370 case 1000: /* 1000,1002: enable xterm mouse report */
1371 MODBIT(term.mode, set, MODE_MOUSEBTN);
1372 break;
1373 case 1002:
1374 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1375 break;
1376 case 1049: /* = 1047 and 1048 */
1377 case 47:
1378 case 1047:
1379 if(IS_SET(MODE_ALTSCREEN))
1380 tclearregion(0, 0, term.col-1, term.row-1);
1381 if((set && !IS_SET(MODE_ALTSCREEN)) ||
1382 (!set && IS_SET(MODE_ALTSCREEN))) {
1383 tswapscreen();
1384 }
1385 if(*args != 1049)
1386 break;
1387 /* pass through */
1388 case 1048:
1389 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1390 break;
1391 default:
1392 /* case 2: DECANM -- ANSI/VT52 (NOT SUPPOURTED) */
1393 /* case 3: DECCOLM -- Column (NOT SUPPORTED) */
1394 /* case 4: DECSCLM -- Scroll (NOT SUPPORTED) */
1395 /* case 18: DECPFF -- Printer feed (NOT SUPPORTED) */
1396 /* case 19: DECPEX -- Printer extent (NOT SUPPORTED) */
1397 /* case 42: DECNRCM -- National characters (NOT SUPPORTED) */
1398 fprintf(stderr,
1399 "erresc: unknown private set/reset mode %d\n",
1400 *args);
1401 break;
1402 }
1403 } else {
1404 switch(*args) {
1405 case 0: /* Error (IGNORED) */
1406 break;
1407 case 2: /* KAM -- keyboard action */
1408 MODBIT(term.mode, set, MODE_KBDLOCK);
1409 break;
1410 case 4: /* IRM -- Insertion-replacement */
1411 MODBIT(term.mode, set, MODE_INSERT);
1412 break;
1413 case 12: /* XXX: SRM -- Send/Receive */
1414 break;
1415 case 20: /* LNM -- Linefeed/new line */
1416 MODBIT(term.mode, set, MODE_CRLF);
1417 break;
1418 default:
1419 fprintf(stderr,
1420 "erresc: unknown set/reset mode %d\n",
1421 *args);
1422 break;
1423 }
1424 }
1425 }
1426 }
1427 #undef MODBIT
1428
1429
1430 void
1431 csihandle(void) {
1432 switch(csiescseq.mode) {
1433 default:
1434 unknown:
1435 fprintf(stderr, "erresc: unknown csi ");
1436 csidump();
1437 /* die(""); */
1438 break;
1439 case '@': /* ICH -- Insert <n> blank char */
1440 DEFAULT(csiescseq.arg[0], 1);
1441 tinsertblank(csiescseq.arg[0]);
1442 break;
1443 case 'A': /* CUU -- Cursor <n> Up */
1444 case 'e':
1445 DEFAULT(csiescseq.arg[0], 1);
1446 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1447 break;
1448 case 'B': /* CUD -- Cursor <n> Down */
1449 DEFAULT(csiescseq.arg[0], 1);
1450 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1451 break;
1452 case 'C': /* CUF -- Cursor <n> Forward */
1453 case 'a':
1454 DEFAULT(csiescseq.arg[0], 1);
1455 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1456 break;
1457 case 'D': /* CUB -- Cursor <n> Backward */
1458 DEFAULT(csiescseq.arg[0], 1);
1459 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1460 break;
1461 case 'E': /* CNL -- Cursor <n> Down and first col */
1462 DEFAULT(csiescseq.arg[0], 1);
1463 tmoveto(0, term.c.y+csiescseq.arg[0]);
1464 break;
1465 case 'F': /* CPL -- Cursor <n> Up and first col */
1466 DEFAULT(csiescseq.arg[0], 1);
1467 tmoveto(0, term.c.y-csiescseq.arg[0]);
1468 break;
1469 case 'g': /* TBC -- Tabulation clear */
1470 switch (csiescseq.arg[0]) {
1471 case 0: /* clear current tab stop */
1472 term.tabs[term.c.x] = 0;
1473 break;
1474 case 3: /* clear all the tabs */
1475 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1476 break;
1477 default:
1478 goto unknown;
1479 }
1480 break;
1481 case 'G': /* CHA -- Move to <col> */
1482 case '`': /* HPA */
1483 DEFAULT(csiescseq.arg[0], 1);
1484 tmoveto(csiescseq.arg[0]-1, term.c.y);
1485 break;
1486 case 'H': /* CUP -- Move to <row> <col> */
1487 case 'f': /* HVP */
1488 DEFAULT(csiescseq.arg[0], 1);
1489 DEFAULT(csiescseq.arg[1], 1);
1490 tmoveto(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1491 break;
1492 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1493 DEFAULT(csiescseq.arg[0], 1);
1494 while(csiescseq.arg[0]--)
1495 tputtab(1);
1496 break;
1497 case 'J': /* ED -- Clear screen */
1498 sel.bx = -1;
1499 switch(csiescseq.arg[0]) {
1500 case 0: /* below */
1501 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1502 if(term.c.y < term.row-1)
1503 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1504 break;
1505 case 1: /* above */
1506 if(term.c.y > 1)
1507 tclearregion(0, 0, term.col-1, term.c.y-1);
1508 tclearregion(0, term.c.y, term.c.x, term.c.y);
1509 break;
1510 case 2: /* all */
1511 tclearregion(0, 0, term.col-1, term.row-1);
1512 break;
1513 default:
1514 goto unknown;
1515 }
1516 break;
1517 case 'K': /* EL -- Clear line */
1518 switch(csiescseq.arg[0]) {
1519 case 0: /* right */
1520 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1521 break;
1522 case 1: /* left */
1523 tclearregion(0, term.c.y, term.c.x, term.c.y);
1524 break;
1525 case 2: /* all */
1526 tclearregion(0, term.c.y, term.col-1, term.c.y);
1527 break;
1528 }
1529 break;
1530 case 'S': /* SU -- Scroll <n> line up */
1531 DEFAULT(csiescseq.arg[0], 1);
1532 tscrollup(term.top, csiescseq.arg[0]);
1533 break;
1534 case 'T': /* SD -- Scroll <n> line down */
1535 DEFAULT(csiescseq.arg[0], 1);
1536 tscrolldown(term.top, csiescseq.arg[0]);
1537 break;
1538 case 'L': /* IL -- Insert <n> blank lines */
1539 DEFAULT(csiescseq.arg[0], 1);
1540 tinsertblankline(csiescseq.arg[0]);
1541 break;
1542 case 'l': /* RM -- Reset Mode */
1543 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1544 break;
1545 case 'M': /* DL -- Delete <n> lines */
1546 DEFAULT(csiescseq.arg[0], 1);
1547 tdeleteline(csiescseq.arg[0]);
1548 break;
1549 case 'X': /* ECH -- Erase <n> char */
1550 DEFAULT(csiescseq.arg[0], 1);
1551 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
1552 break;
1553 case 'P': /* DCH -- Delete <n> char */
1554 DEFAULT(csiescseq.arg[0], 1);
1555 tdeletechar(csiescseq.arg[0]);
1556 break;
1557 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1558 DEFAULT(csiescseq.arg[0], 1);
1559 while(csiescseq.arg[0]--)
1560 tputtab(0);
1561 break;
1562 case 'd': /* VPA -- Move to <row> */
1563 DEFAULT(csiescseq.arg[0], 1);
1564 tmoveto(term.c.x, csiescseq.arg[0]-1);
1565 break;
1566 case 'h': /* SM -- Set terminal mode */
1567 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1568 break;
1569 case 'm': /* SGR -- Terminal attribute (color) */
1570 tsetattr(csiescseq.arg, csiescseq.narg);
1571 break;
1572 case 'r': /* DECSTBM -- Set Scrolling Region */
1573 if(csiescseq.priv)
1574 goto unknown;
1575 else {
1576 DEFAULT(csiescseq.arg[0], 1);
1577 DEFAULT(csiescseq.arg[1], term.row);
1578 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1579 tmoveto(0, 0);
1580 }
1581 break;
1582 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1583 tcursor(CURSOR_SAVE);
1584 break;
1585 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1586 tcursor(CURSOR_LOAD);
1587 break;
1588 }
1589 }
1590
1591 void
1592 csidump(void) {
1593 int i;
1594 printf("ESC[");
1595 for(i = 0; i < csiescseq.len; i++) {
1596 uint c = csiescseq.buf[i] & 0xff;
1597 if(isprint(c)) putchar(c);
1598 else if(c == '\n') printf("(\\n)");
1599 else if(c == '\r') printf("(\\r)");
1600 else if(c == 0x1b) printf("(\\e)");
1601 else printf("(%02x)", c);
1602 }
1603 putchar('\n');
1604 }
1605
1606 void
1607 csireset(void) {
1608 memset(&csiescseq, 0, sizeof(csiescseq));
1609 }
1610
1611 void
1612 strhandle(void) {
1613 char *p;
1614
1615 /*
1616 * TODO: make this being useful in case of color palette change.
1617 */
1618 strparse();
1619
1620 p = strescseq.buf;
1621
1622 switch(strescseq.type) {
1623 case ']': /* OSC -- Operating System Command */
1624 switch(p[0]) {
1625 case '0':
1626 case '1':
1627 case '2':
1628 /*
1629 * TODO: Handle special chars in string, like umlauts.
1630 */
1631 if(p[1] == ';') {
1632 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1633 }
1634 break;
1635 case ';':
1636 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1637 break;
1638 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1639 break;
1640 default:
1641 fprintf(stderr, "erresc: unknown str ");
1642 strdump();
1643 break;
1644 }
1645 break;
1646 case 'k': /* old title set compatibility */
1647 XStoreName(xw.dpy, xw.win, strescseq.buf);
1648 break;
1649 case 'P': /* DSC -- Device Control String */
1650 case '_': /* APC -- Application Program Command */
1651 case '^': /* PM -- Privacy Message */
1652 default:
1653 fprintf(stderr, "erresc: unknown str ");
1654 strdump();
1655 /* die(""); */
1656 break;
1657 }
1658 }
1659
1660 void
1661 strparse(void) {
1662 /*
1663 * TODO: Implement parsing like for CSI when required.
1664 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1665 */
1666 return;
1667 }
1668
1669 void
1670 strdump(void) {
1671 int i;
1672 printf("ESC%c", strescseq.type);
1673 for(i = 0; i < strescseq.len; i++) {
1674 uint c = strescseq.buf[i] & 0xff;
1675 if(isprint(c)) putchar(c);
1676 else if(c == '\n') printf("(\\n)");
1677 else if(c == '\r') printf("(\\r)");
1678 else if(c == 0x1b) printf("(\\e)");
1679 else printf("(%02x)", c);
1680 }
1681 printf("ESC\\\n");
1682 }
1683
1684 void
1685 strreset(void) {
1686 memset(&strescseq, 0, sizeof(strescseq));
1687 }
1688
1689 void
1690 tputtab(bool forward) {
1691 uint x = term.c.x;
1692
1693 if(forward) {
1694 if(x == term.col)
1695 return;
1696 for(++x; x < term.col && !term.tabs[x]; ++x)
1697 /* nothing */ ;
1698 } else {
1699 if(x == 0)
1700 return;
1701 for(--x; x > 0 && !term.tabs[x]; --x)
1702 /* nothing */ ;
1703 }
1704 tmoveto(x, term.c.y);
1705 }
1706
1707 void
1708 tputc(char *c, int len) {
1709 uchar ascii = *c;
1710
1711 if(iofd != -1)
1712 write(iofd, c, len);
1713
1714 switch(ascii) {
1715 case '\t':
1716 tputtab(1);
1717 return;
1718 case '\b':
1719 tmoveto(term.c.x-1, term.c.y);
1720 return;
1721 case '\r':
1722 tmoveto(0, term.c.y);
1723 return;
1724 case '\f':
1725 case '\v':
1726 case '\n':
1727 /* go to first col if the mode is set */
1728 tnewline(IS_SET(MODE_CRLF));
1729 return;
1730 case '\a':
1731 if(term.esc & ESC_STR)
1732 break;
1733
1734 if(!(xw.state & WIN_FOCUSED))
1735 xseturgency(1);
1736 return;
1737 case '\033':
1738 csireset();
1739 term.esc = ESC_START;
1740 return;
1741 }
1742
1743 if(term.esc & ESC_START) {
1744 if(term.esc & ESC_CSI) {
1745 csiescseq.buf[csiescseq.len++] = ascii;
1746 if(BETWEEN(ascii, 0x40, 0x7E) || csiescseq.len >= ESC_BUF_SIZ) {
1747 term.esc = 0;
1748 csiparse(), csihandle();
1749 }
1750 } else if(term.esc & ESC_STR) {
1751 switch(ascii) {
1752 case '\033':
1753 term.esc = ESC_START | ESC_STR_END;
1754 break;
1755 case '\a': /* backwards compatibility to xterm */
1756 term.esc = 0;
1757 strhandle();
1758 break;
1759 default:
1760 strescseq.buf[strescseq.len++] = ascii;
1761 if(strescseq.len+1 >= STR_BUF_SIZ) {
1762 term.esc = 0;
1763 strhandle();
1764 }
1765 }
1766 } else if(term.esc & ESC_STR_END) {
1767 term.esc = 0;
1768 if(ascii == '\\')
1769 strhandle();
1770 } else if(term.esc & ESC_ALTCHARSET) {
1771 switch(ascii) {
1772 case '0': /* Line drawing set */
1773 term.c.attr.mode |= ATTR_GFX;
1774 break;
1775 case 'B': /* USASCII */
1776 term.c.attr.mode &= ~ATTR_GFX;
1777 break;
1778 case 'A': /* UK (IGNORED) */
1779 case '<': /* multinational charset (IGNORED) */
1780 case '5': /* Finnish (IGNORED) */
1781 case 'C': /* Finnish (IGNORED) */
1782 case 'K': /* German (IGNORED) */
1783 break;
1784 default:
1785 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1786 }
1787 term.esc = 0;
1788 } else {
1789 switch(ascii) {
1790 case '[':
1791 term.esc |= ESC_CSI;
1792 break;
1793 case 'P': /* DCS -- Device Control String */
1794 case '_': /* APC -- Application Program Command */
1795 case '^': /* PM -- Privacy Message */
1796 case ']': /* OSC -- Operating System Command */
1797 case 'k': /* old title set compatibility */
1798 strreset();
1799 strescseq.type = ascii;
1800 term.esc |= ESC_STR;
1801 break;
1802 case '(': /* set primary charset G0 */
1803 term.esc |= ESC_ALTCHARSET;
1804 break;
1805 case ')': /* set secondary charset G1 (IGNORED) */
1806 case '*': /* set tertiary charset G2 (IGNORED) */
1807 case '+': /* set quaternary charset G3 (IGNORED) */
1808 term.esc = 0;
1809 break;
1810 case 'D': /* IND -- Linefeed */
1811 if(term.c.y == term.bot)
1812 tscrollup(term.top, 1);
1813 else
1814 tmoveto(term.c.x, term.c.y+1);
1815 term.esc = 0;
1816 break;
1817 case 'E': /* NEL -- Next line */
1818 tnewline(1); /* always go to first col */
1819 term.esc = 0;
1820 break;
1821 case 'H': /* HTS -- Horizontal tab stop */
1822 term.tabs[term.c.x] = 1;
1823 term.esc = 0;
1824 break;
1825 case 'M': /* RI -- Reverse index */
1826 if(term.c.y == term.top)
1827 tscrolldown(term.top, 1);
1828 else
1829 tmoveto(term.c.x, term.c.y-1);
1830 term.esc = 0;
1831 break;
1832 case 'c': /* RIS -- Reset to inital state */
1833 treset();
1834 term.esc = 0;
1835 xclearborders();
1836 xresettitle();
1837 break;
1838 case '=': /* DECPAM -- Application keypad */
1839 term.mode |= MODE_APPKEYPAD;
1840 term.esc = 0;
1841 break;
1842 case '>': /* DECPNM -- Normal keypad */
1843 term.mode &= ~MODE_APPKEYPAD;
1844 term.esc = 0;
1845 break;
1846 case '7': /* DECSC -- Save Cursor */
1847 tcursor(CURSOR_SAVE);
1848 term.esc = 0;
1849 break;
1850 case '8': /* DECRC -- Restore Cursor */
1851 tcursor(CURSOR_LOAD);
1852 term.esc = 0;
1853 break;
1854 case '\\': /* ST -- Stop */
1855 term.esc = 0;
1856 break;
1857 default:
1858 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
1859 (uchar) ascii, isprint(ascii)?ascii:'.');
1860 term.esc = 0;
1861 }
1862 }
1863 } else {
1864 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
1865 sel.bx = -1;
1866 if(ascii >= '\020' || term.c.attr.mode & ATTR_GFX) {
1867 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1868 tnewline(1); /* always go to first col */
1869 tsetchar(c);
1870 if(term.c.x+1 < term.col)
1871 tmoveto(term.c.x+1, term.c.y);
1872 else
1873 term.c.state |= CURSOR_WRAPNEXT;
1874 }
1875 }
1876 }
1877
1878 int
1879 tresize(int col, int row) {
1880 int i, x;
1881 int minrow = MIN(row, term.row);
1882 int mincol = MIN(col, term.col);
1883 int slide = term.c.y - row + 1;
1884
1885 if(col < 1 || row < 1)
1886 return 0;
1887
1888 /* free unneeded rows */
1889 i = 0;
1890 if(slide > 0) {
1891 /* slide screen to keep cursor where we expect it -
1892 * tscrollup would work here, but we can optimize to
1893 * memmove because we're freeing the earlier lines */
1894 for(/* i = 0 */; i < slide; i++) {
1895 free(term.line[i]);
1896 free(term.alt[i]);
1897 }
1898 memmove(term.line, term.line + slide, row * sizeof(Line));
1899 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1900 }
1901 for(i += row; i < term.row; i++) {
1902 free(term.line[i]);
1903 free(term.alt[i]);
1904 }
1905
1906 /* resize to new height */
1907 term.line = xrealloc(term.line, row * sizeof(Line));
1908 term.alt = xrealloc(term.alt, row * sizeof(Line));
1909 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
1910 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
1911
1912 /* resize each row to new width, zero-pad if needed */
1913 for(i = 0; i < minrow; i++) {
1914 term.dirty[i] = 1;
1915 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
1916 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
1917 for(x = mincol; x < col; x++) {
1918 term.line[i][x].state = 0;
1919 term.alt[i][x].state = 0;
1920 }
1921 }
1922
1923 /* allocate any new rows */
1924 for(/* i == minrow */; i < row; i++) {
1925 term.dirty[i] = 1;
1926 term.line[i] = xcalloc(col, sizeof(Glyph));
1927 term.alt [i] = xcalloc(col, sizeof(Glyph));
1928 }
1929 if(col > term.col) {
1930 bool *bp = term.tabs + term.col;
1931
1932 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
1933 while(--bp > term.tabs && !*bp)
1934 /* nothing */ ;
1935 for(bp += TAB; bp < term.tabs + col; bp += TAB)
1936 *bp = 1;
1937 }
1938 /* update terminal size */
1939 term.col = col, term.row = row;
1940 /* make use of the LIMIT in tmoveto */
1941 tmoveto(term.c.x, term.c.y);
1942 /* reset scrolling region */
1943 tsetscroll(0, row-1);
1944
1945 return (slide > 0);
1946 }
1947
1948 void
1949 xresize(int col, int row) {
1950 xw.tw = MAX(1, 2*BORDER + col * xw.cw);
1951 xw.th = MAX(1, 2*BORDER + row * xw.ch);
1952
1953 XftDrawChange(xw.xft_draw, xw.buf);
1954 }
1955
1956 void
1957 xloadcols(void) {
1958 int i, r, g, b;
1959 XRenderColor xft_color = { .alpha = 0 };
1960
1961 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
1962 for(i = 0; i < LEN(colorname); i++) {
1963 if(!colorname[i])
1964 continue;
1965 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.xft_col[i])) {
1966 die("Could not allocate color '%s'\n", colorname[i]);
1967 }
1968 }
1969
1970 /* load colors [16-255] ; same colors as xterm */
1971 for(i = 16, r = 0; r < 6; r++) {
1972 for(g = 0; g < 6; g++) {
1973 for(b = 0; b < 6; b++) {
1974 xft_color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1975 xft_color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1976 xft_color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1977 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &xft_color, &dc.xft_col[i])) {
1978 die("Could not allocate color %d\n", i);
1979 }
1980 i++;
1981 }
1982 }
1983 }
1984
1985 for(r = 0; r < 24; r++, i++) {
1986 xft_color.red = xft_color.green = xft_color.blue = 0x0808 + 0x0a0a * r;
1987 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &xft_color, &dc.xft_col[i])) {
1988 die("Could not allocate color %d\n", i);
1989 }
1990 }
1991 }
1992
1993 void
1994 xtermclear(int col1, int row1, int col2, int row2) {
1995 XftDrawRect(xw.xft_draw,
1996 &dc.xft_col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG],
1997 BORDER + col1 * xw.cw,
1998 BORDER + row1 * xw.ch,
1999 (col2-col1+1) * xw.cw,
2000 (row2-row1+1) * xw.ch);
2001 }
2002
2003 /*
2004 * Absolute coordinates.
2005 */
2006 void
2007 xclear(int x1, int y1, int x2, int y2) {
2008 XftDrawRect(xw.xft_draw,
2009 &dc.xft_col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG],
2010 x1, y1, x2-x1, y2-y1);
2011 }
2012
2013 void
2014 xclearborders(void) {
2015 /* top and left border */
2016 xclear(0, 0, BORDER, xw.h);
2017 xclear(0, 0, xw.w, BORDER);
2018
2019 /* lower and right border */
2020 xclear(BORDER, xw.th - 1, xw.w, xw.h);
2021 /* Will just draw what hasn't been drawn by the previous call. */
2022 xclear(xw.tw - 1, BORDER, xw.w, xw.h - xw.th - 2);
2023 }
2024
2025 void
2026 xhints(void) {
2027 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
2028 XWMHints wm = {.flags = InputHint, .input = 1};
2029 XSizeHints *sizeh = NULL;
2030
2031 sizeh = XAllocSizeHints();
2032 if(xw.isfixed == False) {
2033 sizeh->flags = PSize | PResizeInc | PBaseSize;
2034 sizeh->height = xw.h;
2035 sizeh->width = xw.w;
2036 sizeh->height_inc = xw.ch;
2037 sizeh->width_inc = xw.cw;
2038 sizeh->base_height = 2*BORDER;
2039 sizeh->base_width = 2*BORDER;
2040 } else {
2041 sizeh->flags = PMaxSize | PMinSize;
2042 sizeh->min_width = sizeh->max_width = xw.fw;
2043 sizeh->min_height = sizeh->max_height = xw.fh;
2044 }
2045
2046 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2047 XFree(sizeh);
2048 }
2049
2050 void
2051 xinitfont(Font *f, char *fontstr) {
2052 FcPattern *pattern, *match;
2053 FcResult result;
2054
2055 pattern = FcNameParse((FcChar8 *)fontstr);
2056 if(!pattern)
2057 die("st: can't open font %s\n", fontstr);
2058
2059 match = XftFontMatch(xw.dpy, xw.scr, pattern, &result);
2060 FcPatternDestroy(pattern);
2061 if(!match)
2062 die("st: can't open font %s\n", fontstr);
2063 if(!(f->xft_set = XftFontOpenPattern(xw.dpy, match))) {
2064 FcPatternDestroy(match);
2065 die("st: can't open font %s.\n", fontstr);
2066 }
2067
2068 f->ascent = f->xft_set->ascent;
2069 f->descent = f->xft_set->descent;
2070 f->lbearing = 0;
2071 f->rbearing = f->xft_set->max_advance_width;
2072
2073 f->height = f->xft_set->height;
2074 f->width = f->lbearing + f->rbearing;
2075 }
2076
2077 void
2078 initfonts(char *fontstr) {
2079 char *fstr;
2080
2081 xinitfont(&dc.font, fontstr);
2082 xw.cw = dc.font.width;
2083 xw.ch = dc.font.height;
2084
2085 fstr = smstrcat(fontstr, ":weight=bold", NULL);
2086 xinitfont(&dc.bfont, fstr);
2087 free(fstr);
2088
2089 fstr = smstrcat(fontstr, ":slant=italic,oblique", NULL);
2090 xinitfont(&dc.ifont, fstr);
2091 free(fstr);
2092
2093 fstr = smstrcat(fontstr, ":weight=bold:slant=italic,oblique", NULL);
2094 xinitfont(&dc.ibfont, fstr);
2095 free(fstr);
2096 }
2097
2098 void
2099 xinit(void) {
2100 XSetWindowAttributes attrs;
2101 Cursor cursor;
2102 Window parent;
2103 int sw, sh, major, minor;
2104
2105 if(!(xw.dpy = XOpenDisplay(NULL)))
2106 die("Can't open display\n");
2107 xw.scr = XDefaultScreen(xw.dpy);
2108 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2109
2110 /* font */
2111 initfonts((opt_font != NULL)? opt_font : FONT);
2112
2113 /* colors */
2114 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2115 xloadcols();
2116
2117 /* adjust fixed window geometry */
2118 if(xw.isfixed) {
2119 sw = DisplayWidth(xw.dpy, xw.scr);
2120 sh = DisplayHeight(xw.dpy, xw.scr);
2121 if(xw.fx < 0)
2122 xw.fx = sw + xw.fx - xw.fw - 1;
2123 if(xw.fy < 0)
2124 xw.fy = sh + xw.fy - xw.fh - 1;
2125
2126 xw.h = xw.fh;
2127 xw.w = xw.fw;
2128 } else {
2129 /* window - default size */
2130 xw.h = 2*BORDER + term.row * xw.ch;
2131 xw.w = 2*BORDER + term.col * xw.cw;
2132 xw.fx = 0;
2133 xw.fy = 0;
2134 }
2135
2136 attrs.background_pixel = dc.xft_col[DefaultBG].pixel;
2137 attrs.border_pixel = dc.xft_col[DefaultBG].pixel;
2138 attrs.bit_gravity = NorthWestGravity;
2139 attrs.event_mask = FocusChangeMask | KeyPressMask
2140 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2141 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2142 attrs.colormap = xw.cmap;
2143
2144 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
2145 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2146 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2147 xw.vis,
2148 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2149 | CWColormap,
2150 &attrs);
2151
2152 /* double buffering */
2153 if(!XdbeQueryExtension(xw.dpy, &major, &minor))
2154 die("Xdbe extension is not present\n");
2155 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
2156
2157 /* Xft rendering context */
2158 xw.xft_draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2159
2160 /* input methods */
2161 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
2162 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2163 | XIMStatusNothing, XNClientWindow, xw.win,
2164 XNFocusWindow, xw.win, NULL);
2165 /* gc */
2166 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
2167
2168 /* white cursor, black outline */
2169 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2170 XDefineCursor(xw.dpy, xw.win, cursor);
2171 XRecolorCursor(xw.dpy, cursor,
2172 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2173 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2174
2175 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2176
2177 xresettitle();
2178 XMapWindow(xw.dpy, xw.win);
2179 xhints();
2180 XSync(xw.dpy, 0);
2181 }
2182
2183 void
2184 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2185 int winx = BORDER+x*xw.cw, winy = BORDER+y*xw.ch,
2186 width = charlen*xw.cw;
2187 Font *font = &dc.font;
2188 XGlyphInfo extents;
2189 XftColor *fg = &dc.xft_col[base.fg], *bg = &dc.xft_col[base.bg],
2190 *temp, revfg, revbg;
2191 XRenderColor colfg, colbg;
2192
2193 if(base.mode & ATTR_REVERSE)
2194 temp = fg, fg = bg, bg = temp;
2195
2196 if(base.mode & ATTR_BOLD) {
2197 if(BETWEEN(base.fg, 0, 7)) {
2198 /* basic system colors */
2199 fg = &dc.xft_col[base.fg + 8];
2200 } else if(BETWEEN(base.fg, 16, 195)) {
2201 /* 256 colors */
2202 fg = &dc.xft_col[base.fg + 36];
2203 } else if(BETWEEN(base.fg, 232, 251)) {
2204 /* greyscale */
2205 fg = &dc.xft_col[base.fg + 4];
2206 }
2207 /*
2208 * Those ranges will not be brightened:
2209 * 8 - 15 – bright system colors
2210 * 196 - 231 – highest 256 color cube
2211 * 252 - 255 – brightest colors in grescale
2212 */
2213 font = &dc.bfont;
2214 }
2215
2216 if(base.mode & ATTR_ITALIC)
2217 font = &dc.ifont;
2218 if(base.mode & (ATTR_ITALIC|ATTR_ITALIC))
2219 font = &dc.ibfont;
2220
2221 if(IS_SET(MODE_REVERSE)) {
2222 if(fg == &dc.xft_col[DefaultFG]) {
2223 fg = &dc.xft_col[DefaultBG];
2224 } else {
2225 colfg.red = ~fg->color.red;
2226 colfg.green = ~fg->color.green;
2227 colfg.blue = ~fg->color.blue;
2228 colfg.alpha = fg->color.alpha;
2229 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2230 fg = &revfg;
2231 }
2232
2233 if(bg == &dc.xft_col[DefaultBG]) {
2234 bg = &dc.xft_col[DefaultFG];
2235 } else {
2236 colbg.red = ~bg->color.red;
2237 colbg.green = ~bg->color.green;
2238 colbg.blue = ~bg->color.blue;
2239 colbg.alpha = bg->color.alpha;
2240 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2241 bg = &revbg;
2242 }
2243 }
2244
2245 XftTextExtentsUtf8(xw.dpy, font->xft_set, (FcChar8 *)s, bytelen,
2246 &extents);
2247 width = extents.xOff;
2248
2249 XftDrawRect(xw.xft_draw, bg, winx, winy, width, xw.ch);
2250 XftDrawStringUtf8(xw.xft_draw, fg, font->xft_set, winx,
2251 winy + font->ascent, (FcChar8 *)s, bytelen);
2252
2253 if(base.mode & ATTR_UNDERLINE) {
2254 XftDrawRect(xw.xft_draw, fg, winx, winy + font->ascent + 1,
2255 width, 1);
2256 }
2257 }
2258
2259 void
2260 xdrawcursor(void) {
2261 static int oldx = 0;
2262 static int oldy = 0;
2263 int sl;
2264 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
2265
2266 LIMIT(oldx, 0, term.col-1);
2267 LIMIT(oldy, 0, term.row-1);
2268
2269 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2270 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2271
2272 /* remove the old cursor */
2273 if(term.line[oldy][oldx].state & GLYPH_SET) {
2274 sl = utf8size(term.line[oldy][oldx].c);
2275 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
2276 } else
2277 xtermclear(oldx, oldy, oldx, oldy);
2278
2279 /* draw the new one */
2280 if(!(term.c.state & CURSOR_HIDE)) {
2281 if(!(xw.state & WIN_FOCUSED))
2282 g.bg = DefaultUCS;
2283
2284 if(IS_SET(MODE_REVERSE))
2285 g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
2286
2287 sl = utf8size(g.c);
2288 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2289 oldx = term.c.x, oldy = term.c.y;
2290 }
2291 }
2292
2293 void
2294 xresettitle(void) {
2295 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
2296 }
2297
2298 void
2299 redraw(void) {
2300 struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
2301
2302 xclearborders();
2303 tfulldirt();
2304 draw();
2305 XSync(xw.dpy, False); /* necessary for a good tput flash */
2306 nanosleep(&tv, NULL);
2307 }
2308
2309 void
2310 draw(void) {
2311 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2312
2313 drawregion(0, 0, term.col, term.row);
2314 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2315 }
2316
2317 void
2318 drawregion(int x1, int y1, int x2, int y2) {
2319 int ic, ib, x, y, ox, sl;
2320 Glyph base, new;
2321 char buf[DRAW_BUF_SIZ];
2322 bool ena_sel = sel.bx != -1, alt = IS_SET(MODE_ALTSCREEN);
2323
2324 if((sel.alt && !alt) || (!sel.alt && alt))
2325 ena_sel = 0;
2326 if(!(xw.state & WIN_VISIBLE))
2327 return;
2328
2329 for(y = y1; y < y2; y++) {
2330 if(!term.dirty[y])
2331 continue;
2332 xtermclear(0, y, term.col, y);
2333 term.dirty[y] = 0;
2334 base = term.line[y][0];
2335 ic = ib = ox = 0;
2336 for(x = x1; x < x2; x++) {
2337 new = term.line[y][x];
2338 if(ena_sel && *(new.c) && selected(x, y))
2339 new.mode ^= ATTR_REVERSE;
2340 if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
2341 ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2342 xdraws(buf, base, ox, y, ic, ib);
2343 ic = ib = 0;
2344 }
2345 if(new.state & GLYPH_SET) {
2346 if(ib == 0) {
2347 ox = x;
2348 base = new;
2349 }
2350 sl = utf8size(new.c);
2351 memcpy(buf+ib, new.c, sl);
2352 ib += sl;
2353 ++ic;
2354 }
2355 }
2356 if(ib > 0)
2357 xdraws(buf, base, ox, y, ic, ib);
2358 }
2359 xdrawcursor();
2360 }
2361
2362 void
2363 expose(XEvent *ev) {
2364 XExposeEvent *e = &ev->xexpose;
2365 if(xw.state & WIN_REDRAW) {
2366 if(!e->count)
2367 xw.state &= ~WIN_REDRAW;
2368 }
2369 }
2370
2371 void
2372 visibility(XEvent *ev) {
2373 XVisibilityEvent *e = &ev->xvisibility;
2374 if(e->state == VisibilityFullyObscured)
2375 xw.state &= ~WIN_VISIBLE;
2376 else if(!(xw.state & WIN_VISIBLE))
2377 /* need a full redraw for next Expose, not just a buf copy */
2378 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2379 }
2380
2381 void
2382 unmap(XEvent *ev) {
2383 xw.state &= ~WIN_VISIBLE;
2384 }
2385
2386 void
2387 xseturgency(int add) {
2388 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2389 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2390 XSetWMHints(xw.dpy, xw.win, h);
2391 XFree(h);
2392 }
2393
2394 void
2395 focus(XEvent *ev) {
2396 if(ev->type == FocusIn) {
2397 xw.state |= WIN_FOCUSED;
2398 xseturgency(0);
2399 } else
2400 xw.state &= ~WIN_FOCUSED;
2401 }
2402
2403 char*
2404 kmap(KeySym k, uint state) {
2405 int i;
2406 state &= ~Mod2Mask;
2407 for(i = 0; i < LEN(key); i++) {
2408 uint mask = key[i].mask;
2409 if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
2410 return (char*)key[i].s;
2411 }
2412 return NULL;
2413 }
2414
2415 void
2416 kpress(XEvent *ev) {
2417 XKeyEvent *e = &ev->xkey;
2418 KeySym ksym;
2419 char buf[32];
2420 char *customkey;
2421 int len;
2422 int meta;
2423 int shift;
2424 Status status;
2425
2426 if (IS_SET(MODE_KBDLOCK))
2427 return;
2428 meta = e->state & Mod1Mask;
2429 shift = e->state & ShiftMask;
2430 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
2431
2432 /* 1. custom keys from config.h */
2433 if((customkey = kmap(ksym, e->state)))
2434 ttywrite(customkey, strlen(customkey));
2435 /* 2. hardcoded (overrides X lookup) */
2436 else
2437 switch(ksym) {
2438 case XK_Up:
2439 case XK_Down:
2440 case XK_Left:
2441 case XK_Right:
2442 /* XXX: shift up/down doesn't work */
2443 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
2444 ttywrite(buf, 3);
2445 break;
2446 case XK_Insert:
2447 if(shift)
2448 selpaste();
2449 break;
2450 case XK_Return:
2451 if(IS_SET(MODE_CRLF))
2452 ttywrite("\r\n", 2);
2453 else
2454 ttywrite("\r", 1);
2455 break;
2456 /* 3. X lookup */
2457 default:
2458 if(len > 0) {
2459 if(meta && len == 1)
2460 ttywrite("\033", 1);
2461 ttywrite(buf, len);
2462 }
2463 break;
2464 }
2465 }
2466
2467 void
2468 cmessage(XEvent *e) {
2469 /* See xembed specs
2470 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2471 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2472 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2473 xw.state |= WIN_FOCUSED;
2474 xseturgency(0);
2475 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2476 xw.state &= ~WIN_FOCUSED;
2477 }
2478 }
2479 }
2480
2481 void
2482 resize(XEvent *e) {
2483 int col, row;
2484
2485 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2486 return;
2487
2488 xw.w = e->xconfigure.width;
2489 xw.h = e->xconfigure.height;
2490 col = (xw.w - 2*BORDER) / xw.cw;
2491 row = (xw.h - 2*BORDER) / xw.ch;
2492 if(col == term.col && row == term.row)
2493 return;
2494
2495 tresize(col, row);
2496 xresize(col, row);
2497 xclearborders();
2498 ttyresize();
2499 }
2500
2501 void
2502 run(void) {
2503 XEvent ev;
2504 fd_set rfd;
2505 int xfd = XConnectionNumber(xw.dpy), i;
2506 struct timeval drawtimeout, *tv = NULL;
2507
2508 for(i = 0;; i++) {
2509 FD_ZERO(&rfd);
2510 FD_SET(cmdfd, &rfd);
2511 FD_SET(xfd, &rfd);
2512 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
2513 if(errno == EINTR)
2514 continue;
2515 die("select failed: %s\n", SERRNO);
2516 }
2517
2518 /*
2519 * Stop after a certain number of reads so the user does not
2520 * feel like the system is stuttering.
2521 */
2522 if(i < 1000 && FD_ISSET(cmdfd, &rfd)) {
2523 ttyread();
2524
2525 /*
2526 * Just wait a bit so it isn't disturbing the
2527 * user and the system is able to write something.
2528 */
2529 drawtimeout.tv_sec = 0;
2530 drawtimeout.tv_usec = 5;
2531 tv = &drawtimeout;
2532 continue;
2533 }
2534 i = 0;
2535 tv = NULL;
2536
2537 while(XPending(xw.dpy)) {
2538 XNextEvent(xw.dpy, &ev);
2539 if(XFilterEvent(&ev, xw.win))
2540 continue;
2541 if(handler[ev.type])
2542 (handler[ev.type])(&ev);
2543 }
2544
2545 draw();
2546 XFlush(xw.dpy);
2547 }
2548 }
2549
2550 int
2551 main(int argc, char *argv[]) {
2552 int i, bitm, xr, yr;
2553 uint wr, hr;
2554
2555 xw.fw = xw.fh = xw.fx = xw.fy = 0;
2556 xw.isfixed = False;
2557
2558 for(i = 1; i < argc; i++) {
2559 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2560 case 'c':
2561 if(++i < argc)
2562 opt_class = argv[i];
2563 break;
2564 case 'e':
2565 /* eat every remaining arguments */
2566 if(++i < argc)
2567 opt_cmd = &argv[i];
2568 goto run;
2569 case 'f':
2570 if(++i < argc)
2571 opt_font = argv[i];
2572 break;
2573 case 'g':
2574 if(++i >= argc)
2575 break;
2576
2577 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
2578 if(bitm & XValue)
2579 xw.fx = xr;
2580 if(bitm & YValue)
2581 xw.fy = yr;
2582 if(bitm & WidthValue)
2583 xw.fw = (int)wr;
2584 if(bitm & HeightValue)
2585 xw.fh = (int)hr;
2586 if(bitm & XNegative && xw.fx == 0)
2587 xw.fx = -1;
2588 if(bitm & XNegative && xw.fy == 0)
2589 xw.fy = -1;
2590
2591 if(xw.fh != 0 && xw.fw != 0)
2592 xw.isfixed = True;
2593 break;
2594 case 'o':
2595 if(++i < argc)
2596 opt_io = argv[i];
2597 break;
2598 case 't':
2599 if(++i < argc)
2600 opt_title = argv[i];
2601 break;
2602 case 'v':
2603 default:
2604 die(USAGE);
2605 case 'w':
2606 if(++i < argc)
2607 opt_embed = argv[i];
2608 break;
2609 }
2610 }
2611
2612 run:
2613 setlocale(LC_CTYPE, "");
2614 tnew(80, 24);
2615 ttynew();
2616 xinit();
2617 selinit();
2618 run();
2619 return 0;
2620 }
2621