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1ac7fdea2e4e003561a31b2c4e751c3a73991afc
[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, wmdeletewin;
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
854 if(waitpid(pid, &stat, 0) < 0)
855 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
856
857 if(WIFEXITED(stat)) {
858 exit(WEXITSTATUS(stat));
859 } else {
860 exit(EXIT_FAILURE);
861 }
862 }
863
864 void
865 ttynew(void) {
866 int m, s;
867
868 /* seems to work fine on linux, openbsd and freebsd */
869 struct winsize w = {term.row, term.col, 0, 0};
870 if(openpty(&m, &s, NULL, NULL, &w) < 0)
871 die("openpty failed: %s\n", SERRNO);
872
873 switch(pid = fork()) {
874 case -1:
875 die("fork failed\n");
876 break;
877 case 0:
878 setsid(); /* create a new process group */
879 dup2(s, STDIN_FILENO);
880 dup2(s, STDOUT_FILENO);
881 dup2(s, STDERR_FILENO);
882 if(ioctl(s, TIOCSCTTY, NULL) < 0)
883 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
884 close(s);
885 close(m);
886 execsh();
887 break;
888 default:
889 close(s);
890 cmdfd = m;
891 signal(SIGCHLD, sigchld);
892 if(opt_io) {
893 if(!strcmp(opt_io, "-")) {
894 iofd = STDOUT_FILENO;
895 } else {
896 if((iofd = open(opt_io, O_WRONLY | O_CREAT, 0666)) < 0) {
897 fprintf(stderr, "Error opening %s:%s\n",
898 opt_io, strerror(errno));
899 }
900 }
901 }
902 }
903 }
904
905 void
906 dump(char c) {
907 static int col;
908 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
909 if(++col % 10 == 0)
910 fprintf(stderr, "\n");
911 }
912
913 void
914 ttyread(void) {
915 static char buf[BUFSIZ];
916 static int buflen = 0;
917 char *ptr;
918 char s[UTF_SIZ];
919 int charsize; /* size of utf8 char in bytes */
920 long utf8c;
921 int ret;
922
923 /* append read bytes to unprocessed bytes */
924 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
925 die("Couldn't read from shell: %s\n", SERRNO);
926
927 /* process every complete utf8 char */
928 buflen += ret;
929 ptr = buf;
930 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
931 charsize = utf8decode(ptr, &utf8c);
932 utf8encode(&utf8c, s);
933 tputc(s, charsize);
934 ptr += charsize;
935 buflen -= charsize;
936 }
937
938 /* keep any uncomplete utf8 char for the next call */
939 memmove(buf, ptr, buflen);
940 }
941
942 void
943 ttywrite(const char *s, size_t n) {
944 if(write(cmdfd, s, n) == -1)
945 die("write error on tty: %s\n", SERRNO);
946 }
947
948 void
949 ttyresize(void) {
950 struct winsize w;
951
952 w.ws_row = term.row;
953 w.ws_col = term.col;
954 w.ws_xpixel = xw.tw;
955 w.ws_ypixel = xw.th;
956 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
957 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
958 }
959
960 void
961 tsetdirt(int top, int bot)
962 {
963 int i;
964
965 LIMIT(top, 0, term.row-1);
966 LIMIT(bot, 0, term.row-1);
967
968 for(i = top; i <= bot; i++)
969 term.dirty[i] = 1;
970 }
971
972 void
973 tfulldirt(void)
974 {
975 tsetdirt(0, term.row-1);
976 }
977
978 void
979 tcursor(int mode) {
980 static TCursor c;
981
982 if(mode == CURSOR_SAVE)
983 c = term.c;
984 else if(mode == CURSOR_LOAD)
985 term.c = c, tmoveto(c.x, c.y);
986 }
987
988 void
989 treset(void) {
990 uint i;
991 term.c = (TCursor){{
992 .mode = ATTR_NULL,
993 .fg = DefaultFG,
994 .bg = DefaultBG
995 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
996
997 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
998 for(i = TAB; i < term.col; i += TAB)
999 term.tabs[i] = 1;
1000 term.top = 0, term.bot = term.row - 1;
1001 term.mode = MODE_WRAP;
1002
1003 tclearregion(0, 0, term.col-1, term.row-1);
1004 }
1005
1006 void
1007 tnew(int col, int row) {
1008 /* set screen size */
1009 term.row = row, term.col = col;
1010 term.line = xmalloc(term.row * sizeof(Line));
1011 term.alt = xmalloc(term.row * sizeof(Line));
1012 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
1013 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
1014
1015 for(row = 0; row < term.row; row++) {
1016 term.line[row] = xmalloc(term.col * sizeof(Glyph));
1017 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
1018 term.dirty[row] = 0;
1019 }
1020 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1021 /* setup screen */
1022 treset();
1023 }
1024
1025 void
1026 tswapscreen(void) {
1027 Line* tmp = term.line;
1028 term.line = term.alt;
1029 term.alt = tmp;
1030 term.mode ^= MODE_ALTSCREEN;
1031 tfulldirt();
1032 }
1033
1034 void
1035 tscrolldown(int orig, int n) {
1036 int i;
1037 Line temp;
1038
1039 LIMIT(n, 0, term.bot-orig+1);
1040
1041 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1042
1043 for(i = term.bot; i >= orig+n; i--) {
1044 temp = term.line[i];
1045 term.line[i] = term.line[i-n];
1046 term.line[i-n] = temp;
1047
1048 term.dirty[i] = 1;
1049 term.dirty[i-n] = 1;
1050 }
1051
1052 selscroll(orig, n);
1053 }
1054
1055 void
1056 tscrollup(int orig, int n) {
1057 int i;
1058 Line temp;
1059 LIMIT(n, 0, term.bot-orig+1);
1060
1061 tclearregion(0, orig, term.col-1, orig+n-1);
1062
1063 for(i = orig; i <= term.bot-n; i++) {
1064 temp = term.line[i];
1065 term.line[i] = term.line[i+n];
1066 term.line[i+n] = temp;
1067
1068 term.dirty[i] = 1;
1069 term.dirty[i+n] = 1;
1070 }
1071
1072 selscroll(orig, -n);
1073 }
1074
1075 void
1076 selscroll(int orig, int n) {
1077 if(sel.bx == -1)
1078 return;
1079
1080 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1081 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1082 sel.bx = -1;
1083 return;
1084 }
1085 if(sel.by < term.top) {
1086 sel.by = term.top;
1087 sel.bx = 0;
1088 }
1089 if(sel.ey > term.bot) {
1090 sel.ey = term.bot;
1091 sel.ex = term.col;
1092 }
1093 sel.b.y = sel.by, sel.b.x = sel.bx;
1094 sel.e.y = sel.ey, sel.e.x = sel.ex;
1095 }
1096 }
1097
1098 void
1099 tnewline(int first_col) {
1100 int y = term.c.y;
1101 if(y == term.bot)
1102 tscrollup(term.top, 1);
1103 else
1104 y++;
1105 tmoveto(first_col ? 0 : term.c.x, y);
1106 }
1107
1108 void
1109 csiparse(void) {
1110 /* int noarg = 1; */
1111 char *p = csiescseq.buf;
1112
1113 csiescseq.narg = 0;
1114 if(*p == '?')
1115 csiescseq.priv = 1, p++;
1116
1117 while(p < csiescseq.buf+csiescseq.len) {
1118 while(isdigit(*p)) {
1119 csiescseq.arg[csiescseq.narg] *= 10;
1120 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1121 }
1122 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ)
1123 csiescseq.narg++, p++;
1124 else {
1125 csiescseq.mode = *p;
1126 csiescseq.narg++;
1127 return;
1128 }
1129 }
1130 }
1131
1132 void
1133 tmoveto(int x, int y) {
1134 LIMIT(x, 0, term.col-1);
1135 LIMIT(y, 0, term.row-1);
1136 term.c.state &= ~CURSOR_WRAPNEXT;
1137 term.c.x = x;
1138 term.c.y = y;
1139 }
1140
1141 void
1142 tsetchar(char *c) {
1143 /*
1144 * The table is proudly stolen from rxvt.
1145 */
1146 if(term.c.attr.mode & ATTR_GFX) {
1147 char *vt100_0[62] = { /* 0x41 - 0x7e */
1148 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1149 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1150 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1151 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1152 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1153 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1154 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1155 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1156 };
1157
1158 if(c[0] >= 0x41 && c[0] <= 0x7e
1159 && vt100_0[c[0] - 0x41]) {
1160 c = vt100_0[c[0] - 0x41];
1161 }
1162 }
1163
1164 term.dirty[term.c.y] = 1;
1165 term.line[term.c.y][term.c.x] = term.c.attr;
1166 memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
1167 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
1168 }
1169
1170 void
1171 tclearregion(int x1, int y1, int x2, int y2) {
1172 int x, y, temp;
1173
1174 if(x1 > x2)
1175 temp = x1, x1 = x2, x2 = temp;
1176 if(y1 > y2)
1177 temp = y1, y1 = y2, y2 = temp;
1178
1179 LIMIT(x1, 0, term.col-1);
1180 LIMIT(x2, 0, term.col-1);
1181 LIMIT(y1, 0, term.row-1);
1182 LIMIT(y2, 0, term.row-1);
1183
1184 for(y = y1; y <= y2; y++) {
1185 term.dirty[y] = 1;
1186 for(x = x1; x <= x2; x++)
1187 term.line[y][x].state = 0;
1188 }
1189 }
1190
1191 void
1192 tdeletechar(int n) {
1193 int src = term.c.x + n;
1194 int dst = term.c.x;
1195 int size = term.col - src;
1196
1197 term.dirty[term.c.y] = 1;
1198
1199 if(src >= term.col) {
1200 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1201 return;
1202 }
1203 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1204 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1205 }
1206
1207 void
1208 tinsertblank(int n) {
1209 int src = term.c.x;
1210 int dst = src + n;
1211 int size = term.col - dst;
1212
1213 term.dirty[term.c.y] = 1;
1214
1215 if(dst >= term.col) {
1216 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1217 return;
1218 }
1219 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1220 tclearregion(src, term.c.y, dst - 1, term.c.y);
1221 }
1222
1223 void
1224 tinsertblankline(int n) {
1225 if(term.c.y < term.top || term.c.y > term.bot)
1226 return;
1227
1228 tscrolldown(term.c.y, n);
1229 }
1230
1231 void
1232 tdeleteline(int n) {
1233 if(term.c.y < term.top || term.c.y > term.bot)
1234 return;
1235
1236 tscrollup(term.c.y, n);
1237 }
1238
1239 void
1240 tsetattr(int *attr, int l) {
1241 int i;
1242
1243 for(i = 0; i < l; i++) {
1244 switch(attr[i]) {
1245 case 0:
1246 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1247 | ATTR_ITALIC | ATTR_BLINK);
1248 term.c.attr.fg = DefaultFG;
1249 term.c.attr.bg = DefaultBG;
1250 break;
1251 case 1:
1252 term.c.attr.mode |= ATTR_BOLD;
1253 break;
1254 case 3: /* enter standout (highlight) */
1255 term.c.attr.mode |= ATTR_ITALIC;
1256 break;
1257 case 4:
1258 term.c.attr.mode |= ATTR_UNDERLINE;
1259 break;
1260 case 5:
1261 term.c.attr.mode |= ATTR_BLINK;
1262 break;
1263 case 7:
1264 term.c.attr.mode |= ATTR_REVERSE;
1265 break;
1266 case 21:
1267 case 22:
1268 term.c.attr.mode &= ~ATTR_BOLD;
1269 break;
1270 case 23: /* leave standout (highlight) mode */
1271 term.c.attr.mode &= ~ATTR_ITALIC;
1272 break;
1273 case 24:
1274 term.c.attr.mode &= ~ATTR_UNDERLINE;
1275 break;
1276 case 25:
1277 term.c.attr.mode &= ~ATTR_BLINK;
1278 break;
1279 case 27:
1280 term.c.attr.mode &= ~ATTR_REVERSE;
1281 break;
1282 case 38:
1283 if(i + 2 < l && attr[i + 1] == 5) {
1284 i += 2;
1285 if(BETWEEN(attr[i], 0, 255))
1286 term.c.attr.fg = attr[i];
1287 else
1288 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
1289 }
1290 else
1291 fprintf(stderr, "erresc(38): gfx attr %d unknown\n", attr[i]);
1292 break;
1293 case 39:
1294 term.c.attr.fg = DefaultFG;
1295 break;
1296 case 48:
1297 if(i + 2 < l && attr[i + 1] == 5) {
1298 i += 2;
1299 if(BETWEEN(attr[i], 0, 255))
1300 term.c.attr.bg = attr[i];
1301 else
1302 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
1303 }
1304 else
1305 fprintf(stderr, "erresc(48): gfx attr %d unknown\n", attr[i]);
1306 break;
1307 case 49:
1308 term.c.attr.bg = DefaultBG;
1309 break;
1310 default:
1311 if(BETWEEN(attr[i], 30, 37))
1312 term.c.attr.fg = attr[i] - 30;
1313 else if(BETWEEN(attr[i], 40, 47))
1314 term.c.attr.bg = attr[i] - 40;
1315 else if(BETWEEN(attr[i], 90, 97))
1316 term.c.attr.fg = attr[i] - 90 + 8;
1317 else if(BETWEEN(attr[i], 100, 107))
1318 term.c.attr.bg = attr[i] - 100 + 8;
1319 else
1320 fprintf(stderr, "erresc(default): gfx attr %d unknown\n", attr[i]), csidump();
1321 break;
1322 }
1323 }
1324 }
1325
1326 void
1327 tsetscroll(int t, int b) {
1328 int temp;
1329
1330 LIMIT(t, 0, term.row-1);
1331 LIMIT(b, 0, term.row-1);
1332 if(t > b) {
1333 temp = t;
1334 t = b;
1335 b = temp;
1336 }
1337 term.top = t;
1338 term.bot = b;
1339 }
1340
1341 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1342
1343 void
1344 tsetmode(bool priv, bool set, int *args, int narg) {
1345 int *lim, mode;
1346
1347 for(lim = args + narg; args < lim; ++args) {
1348 if(priv) {
1349 switch(*args) {
1350 break;
1351 case 1: /* DECCKM -- Cursor key */
1352 MODBIT(term.mode, set, MODE_APPKEYPAD);
1353 break;
1354 case 5: /* DECSCNM -- Reverse video */
1355 mode = term.mode;
1356 MODBIT(term.mode, set, MODE_REVERSE);
1357 if(mode != term.mode)
1358 redraw();
1359 break;
1360 case 6: /* XXX: DECOM -- Origin */
1361 break;
1362 case 7: /* DECAWM -- Auto wrap */
1363 MODBIT(term.mode, set, MODE_WRAP);
1364 break;
1365 case 8: /* XXX: DECARM -- Auto repeat */
1366 break;
1367 case 0: /* Error (IGNORED) */
1368 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1369 break;
1370 case 25:
1371 MODBIT(term.c.state, !set, CURSOR_HIDE);
1372 break;
1373 case 1000: /* 1000,1002: enable xterm mouse report */
1374 MODBIT(term.mode, set, MODE_MOUSEBTN);
1375 break;
1376 case 1002:
1377 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1378 break;
1379 case 1049: /* = 1047 and 1048 */
1380 case 47:
1381 case 1047:
1382 if(IS_SET(MODE_ALTSCREEN))
1383 tclearregion(0, 0, term.col-1, term.row-1);
1384 if((set && !IS_SET(MODE_ALTSCREEN)) ||
1385 (!set && IS_SET(MODE_ALTSCREEN))) {
1386 tswapscreen();
1387 }
1388 if(*args != 1049)
1389 break;
1390 /* pass through */
1391 case 1048:
1392 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1393 break;
1394 default:
1395 /* case 2: DECANM -- ANSI/VT52 (NOT SUPPOURTED) */
1396 /* case 3: DECCOLM -- Column (NOT SUPPORTED) */
1397 /* case 4: DECSCLM -- Scroll (NOT SUPPORTED) */
1398 /* case 18: DECPFF -- Printer feed (NOT SUPPORTED) */
1399 /* case 19: DECPEX -- Printer extent (NOT SUPPORTED) */
1400 /* case 42: DECNRCM -- National characters (NOT SUPPORTED) */
1401 fprintf(stderr,
1402 "erresc: unknown private set/reset mode %d\n",
1403 *args);
1404 break;
1405 }
1406 } else {
1407 switch(*args) {
1408 case 0: /* Error (IGNORED) */
1409 break;
1410 case 2: /* KAM -- keyboard action */
1411 MODBIT(term.mode, set, MODE_KBDLOCK);
1412 break;
1413 case 4: /* IRM -- Insertion-replacement */
1414 MODBIT(term.mode, set, MODE_INSERT);
1415 break;
1416 case 12: /* XXX: SRM -- Send/Receive */
1417 break;
1418 case 20: /* LNM -- Linefeed/new line */
1419 MODBIT(term.mode, set, MODE_CRLF);
1420 break;
1421 default:
1422 fprintf(stderr,
1423 "erresc: unknown set/reset mode %d\n",
1424 *args);
1425 break;
1426 }
1427 }
1428 }
1429 }
1430 #undef MODBIT
1431
1432
1433 void
1434 csihandle(void) {
1435 switch(csiescseq.mode) {
1436 default:
1437 unknown:
1438 fprintf(stderr, "erresc: unknown csi ");
1439 csidump();
1440 /* die(""); */
1441 break;
1442 case '@': /* ICH -- Insert <n> blank char */
1443 DEFAULT(csiescseq.arg[0], 1);
1444 tinsertblank(csiescseq.arg[0]);
1445 break;
1446 case 'A': /* CUU -- Cursor <n> Up */
1447 case 'e':
1448 DEFAULT(csiescseq.arg[0], 1);
1449 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1450 break;
1451 case 'B': /* CUD -- Cursor <n> Down */
1452 DEFAULT(csiescseq.arg[0], 1);
1453 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1454 break;
1455 case 'C': /* CUF -- Cursor <n> Forward */
1456 case 'a':
1457 DEFAULT(csiescseq.arg[0], 1);
1458 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1459 break;
1460 case 'D': /* CUB -- Cursor <n> Backward */
1461 DEFAULT(csiescseq.arg[0], 1);
1462 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1463 break;
1464 case 'E': /* CNL -- Cursor <n> Down and first col */
1465 DEFAULT(csiescseq.arg[0], 1);
1466 tmoveto(0, term.c.y+csiescseq.arg[0]);
1467 break;
1468 case 'F': /* CPL -- Cursor <n> Up and first col */
1469 DEFAULT(csiescseq.arg[0], 1);
1470 tmoveto(0, term.c.y-csiescseq.arg[0]);
1471 break;
1472 case 'g': /* TBC -- Tabulation clear */
1473 switch (csiescseq.arg[0]) {
1474 case 0: /* clear current tab stop */
1475 term.tabs[term.c.x] = 0;
1476 break;
1477 case 3: /* clear all the tabs */
1478 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1479 break;
1480 default:
1481 goto unknown;
1482 }
1483 break;
1484 case 'G': /* CHA -- Move to <col> */
1485 case '`': /* HPA */
1486 DEFAULT(csiescseq.arg[0], 1);
1487 tmoveto(csiescseq.arg[0]-1, term.c.y);
1488 break;
1489 case 'H': /* CUP -- Move to <row> <col> */
1490 case 'f': /* HVP */
1491 DEFAULT(csiescseq.arg[0], 1);
1492 DEFAULT(csiescseq.arg[1], 1);
1493 tmoveto(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1494 break;
1495 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1496 DEFAULT(csiescseq.arg[0], 1);
1497 while(csiescseq.arg[0]--)
1498 tputtab(1);
1499 break;
1500 case 'J': /* ED -- Clear screen */
1501 sel.bx = -1;
1502 switch(csiescseq.arg[0]) {
1503 case 0: /* below */
1504 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1505 if(term.c.y < term.row-1)
1506 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1507 break;
1508 case 1: /* above */
1509 if(term.c.y > 1)
1510 tclearregion(0, 0, term.col-1, term.c.y-1);
1511 tclearregion(0, term.c.y, term.c.x, term.c.y);
1512 break;
1513 case 2: /* all */
1514 tclearregion(0, 0, term.col-1, term.row-1);
1515 break;
1516 default:
1517 goto unknown;
1518 }
1519 break;
1520 case 'K': /* EL -- Clear line */
1521 switch(csiescseq.arg[0]) {
1522 case 0: /* right */
1523 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1524 break;
1525 case 1: /* left */
1526 tclearregion(0, term.c.y, term.c.x, term.c.y);
1527 break;
1528 case 2: /* all */
1529 tclearregion(0, term.c.y, term.col-1, term.c.y);
1530 break;
1531 }
1532 break;
1533 case 'S': /* SU -- Scroll <n> line up */
1534 DEFAULT(csiescseq.arg[0], 1);
1535 tscrollup(term.top, csiescseq.arg[0]);
1536 break;
1537 case 'T': /* SD -- Scroll <n> line down */
1538 DEFAULT(csiescseq.arg[0], 1);
1539 tscrolldown(term.top, csiescseq.arg[0]);
1540 break;
1541 case 'L': /* IL -- Insert <n> blank lines */
1542 DEFAULT(csiescseq.arg[0], 1);
1543 tinsertblankline(csiescseq.arg[0]);
1544 break;
1545 case 'l': /* RM -- Reset Mode */
1546 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1547 break;
1548 case 'M': /* DL -- Delete <n> lines */
1549 DEFAULT(csiescseq.arg[0], 1);
1550 tdeleteline(csiescseq.arg[0]);
1551 break;
1552 case 'X': /* ECH -- Erase <n> char */
1553 DEFAULT(csiescseq.arg[0], 1);
1554 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
1555 break;
1556 case 'P': /* DCH -- Delete <n> char */
1557 DEFAULT(csiescseq.arg[0], 1);
1558 tdeletechar(csiescseq.arg[0]);
1559 break;
1560 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1561 DEFAULT(csiescseq.arg[0], 1);
1562 while(csiescseq.arg[0]--)
1563 tputtab(0);
1564 break;
1565 case 'd': /* VPA -- Move to <row> */
1566 DEFAULT(csiescseq.arg[0], 1);
1567 tmoveto(term.c.x, csiescseq.arg[0]-1);
1568 break;
1569 case 'h': /* SM -- Set terminal mode */
1570 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1571 break;
1572 case 'm': /* SGR -- Terminal attribute (color) */
1573 tsetattr(csiescseq.arg, csiescseq.narg);
1574 break;
1575 case 'r': /* DECSTBM -- Set Scrolling Region */
1576 if(csiescseq.priv)
1577 goto unknown;
1578 else {
1579 DEFAULT(csiescseq.arg[0], 1);
1580 DEFAULT(csiescseq.arg[1], term.row);
1581 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1582 tmoveto(0, 0);
1583 }
1584 break;
1585 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1586 tcursor(CURSOR_SAVE);
1587 break;
1588 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1589 tcursor(CURSOR_LOAD);
1590 break;
1591 }
1592 }
1593
1594 void
1595 csidump(void) {
1596 int i;
1597 printf("ESC[");
1598 for(i = 0; i < csiescseq.len; i++) {
1599 uint c = csiescseq.buf[i] & 0xff;
1600 if(isprint(c)) putchar(c);
1601 else if(c == '\n') printf("(\\n)");
1602 else if(c == '\r') printf("(\\r)");
1603 else if(c == 0x1b) printf("(\\e)");
1604 else printf("(%02x)", c);
1605 }
1606 putchar('\n');
1607 }
1608
1609 void
1610 csireset(void) {
1611 memset(&csiescseq, 0, sizeof(csiescseq));
1612 }
1613
1614 void
1615 strhandle(void) {
1616 char *p;
1617
1618 /*
1619 * TODO: make this being useful in case of color palette change.
1620 */
1621 strparse();
1622
1623 p = strescseq.buf;
1624
1625 switch(strescseq.type) {
1626 case ']': /* OSC -- Operating System Command */
1627 switch(p[0]) {
1628 case '0':
1629 case '1':
1630 case '2':
1631 /*
1632 * TODO: Handle special chars in string, like umlauts.
1633 */
1634 if(p[1] == ';') {
1635 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1636 }
1637 break;
1638 case ';':
1639 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1640 break;
1641 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1642 break;
1643 default:
1644 fprintf(stderr, "erresc: unknown str ");
1645 strdump();
1646 break;
1647 }
1648 break;
1649 case 'k': /* old title set compatibility */
1650 XStoreName(xw.dpy, xw.win, strescseq.buf);
1651 break;
1652 case 'P': /* DSC -- Device Control String */
1653 case '_': /* APC -- Application Program Command */
1654 case '^': /* PM -- Privacy Message */
1655 default:
1656 fprintf(stderr, "erresc: unknown str ");
1657 strdump();
1658 /* die(""); */
1659 break;
1660 }
1661 }
1662
1663 void
1664 strparse(void) {
1665 /*
1666 * TODO: Implement parsing like for CSI when required.
1667 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1668 */
1669 return;
1670 }
1671
1672 void
1673 strdump(void) {
1674 int i;
1675 printf("ESC%c", strescseq.type);
1676 for(i = 0; i < strescseq.len; i++) {
1677 uint c = strescseq.buf[i] & 0xff;
1678 if(isprint(c)) putchar(c);
1679 else if(c == '\n') printf("(\\n)");
1680 else if(c == '\r') printf("(\\r)");
1681 else if(c == 0x1b) printf("(\\e)");
1682 else printf("(%02x)", c);
1683 }
1684 printf("ESC\\\n");
1685 }
1686
1687 void
1688 strreset(void) {
1689 memset(&strescseq, 0, sizeof(strescseq));
1690 }
1691
1692 void
1693 tputtab(bool forward) {
1694 uint x = term.c.x;
1695
1696 if(forward) {
1697 if(x == term.col)
1698 return;
1699 for(++x; x < term.col && !term.tabs[x]; ++x)
1700 /* nothing */ ;
1701 } else {
1702 if(x == 0)
1703 return;
1704 for(--x; x > 0 && !term.tabs[x]; --x)
1705 /* nothing */ ;
1706 }
1707 tmoveto(x, term.c.y);
1708 }
1709
1710 void
1711 tputc(char *c, int len) {
1712 uchar ascii = *c;
1713
1714 if(iofd != -1)
1715 write(iofd, c, len);
1716
1717 switch(ascii) {
1718 case '\t':
1719 tputtab(1);
1720 return;
1721 case '\b':
1722 tmoveto(term.c.x-1, term.c.y);
1723 return;
1724 case '\r':
1725 tmoveto(0, term.c.y);
1726 return;
1727 case '\f':
1728 case '\v':
1729 case '\n':
1730 /* go to first col if the mode is set */
1731 tnewline(IS_SET(MODE_CRLF));
1732 return;
1733 case '\a':
1734 if(term.esc & ESC_STR)
1735 break;
1736
1737 if(!(xw.state & WIN_FOCUSED))
1738 xseturgency(1);
1739 return;
1740 case '\033':
1741 csireset();
1742 term.esc = ESC_START;
1743 return;
1744 }
1745
1746 if(term.esc & ESC_START) {
1747 if(term.esc & ESC_CSI) {
1748 csiescseq.buf[csiescseq.len++] = ascii;
1749 if(BETWEEN(ascii, 0x40, 0x7E) || csiescseq.len >= ESC_BUF_SIZ) {
1750 term.esc = 0;
1751 csiparse(), csihandle();
1752 }
1753 } else if(term.esc & ESC_STR) {
1754 switch(ascii) {
1755 case '\033':
1756 term.esc = ESC_START | ESC_STR_END;
1757 break;
1758 case '\a': /* backwards compatibility to xterm */
1759 term.esc = 0;
1760 strhandle();
1761 break;
1762 default:
1763 strescseq.buf[strescseq.len++] = ascii;
1764 if(strescseq.len+1 >= STR_BUF_SIZ) {
1765 term.esc = 0;
1766 strhandle();
1767 }
1768 }
1769 } else if(term.esc & ESC_STR_END) {
1770 term.esc = 0;
1771 if(ascii == '\\')
1772 strhandle();
1773 } else if(term.esc & ESC_ALTCHARSET) {
1774 switch(ascii) {
1775 case '0': /* Line drawing set */
1776 term.c.attr.mode |= ATTR_GFX;
1777 break;
1778 case 'B': /* USASCII */
1779 term.c.attr.mode &= ~ATTR_GFX;
1780 break;
1781 case 'A': /* UK (IGNORED) */
1782 case '<': /* multinational charset (IGNORED) */
1783 case '5': /* Finnish (IGNORED) */
1784 case 'C': /* Finnish (IGNORED) */
1785 case 'K': /* German (IGNORED) */
1786 break;
1787 default:
1788 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1789 }
1790 term.esc = 0;
1791 } else {
1792 switch(ascii) {
1793 case '[':
1794 term.esc |= ESC_CSI;
1795 break;
1796 case 'P': /* DCS -- Device Control String */
1797 case '_': /* APC -- Application Program Command */
1798 case '^': /* PM -- Privacy Message */
1799 case ']': /* OSC -- Operating System Command */
1800 case 'k': /* old title set compatibility */
1801 strreset();
1802 strescseq.type = ascii;
1803 term.esc |= ESC_STR;
1804 break;
1805 case '(': /* set primary charset G0 */
1806 term.esc |= ESC_ALTCHARSET;
1807 break;
1808 case ')': /* set secondary charset G1 (IGNORED) */
1809 case '*': /* set tertiary charset G2 (IGNORED) */
1810 case '+': /* set quaternary charset G3 (IGNORED) */
1811 term.esc = 0;
1812 break;
1813 case 'D': /* IND -- Linefeed */
1814 if(term.c.y == term.bot)
1815 tscrollup(term.top, 1);
1816 else
1817 tmoveto(term.c.x, term.c.y+1);
1818 term.esc = 0;
1819 break;
1820 case 'E': /* NEL -- Next line */
1821 tnewline(1); /* always go to first col */
1822 term.esc = 0;
1823 break;
1824 case 'H': /* HTS -- Horizontal tab stop */
1825 term.tabs[term.c.x] = 1;
1826 term.esc = 0;
1827 break;
1828 case 'M': /* RI -- Reverse index */
1829 if(term.c.y == term.top)
1830 tscrolldown(term.top, 1);
1831 else
1832 tmoveto(term.c.x, term.c.y-1);
1833 term.esc = 0;
1834 break;
1835 case 'c': /* RIS -- Reset to inital state */
1836 treset();
1837 term.esc = 0;
1838 xclearborders();
1839 xresettitle();
1840 break;
1841 case '=': /* DECPAM -- Application keypad */
1842 term.mode |= MODE_APPKEYPAD;
1843 term.esc = 0;
1844 break;
1845 case '>': /* DECPNM -- Normal keypad */
1846 term.mode &= ~MODE_APPKEYPAD;
1847 term.esc = 0;
1848 break;
1849 case '7': /* DECSC -- Save Cursor */
1850 tcursor(CURSOR_SAVE);
1851 term.esc = 0;
1852 break;
1853 case '8': /* DECRC -- Restore Cursor */
1854 tcursor(CURSOR_LOAD);
1855 term.esc = 0;
1856 break;
1857 case '\\': /* ST -- Stop */
1858 term.esc = 0;
1859 break;
1860 default:
1861 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
1862 (uchar) ascii, isprint(ascii)?ascii:'.');
1863 term.esc = 0;
1864 }
1865 }
1866 } else {
1867 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
1868 sel.bx = -1;
1869 if(ascii >= '\020' || term.c.attr.mode & ATTR_GFX) {
1870 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1871 tnewline(1); /* always go to first col */
1872 tsetchar(c);
1873 if(term.c.x+1 < term.col)
1874 tmoveto(term.c.x+1, term.c.y);
1875 else
1876 term.c.state |= CURSOR_WRAPNEXT;
1877 }
1878 }
1879 }
1880
1881 int
1882 tresize(int col, int row) {
1883 int i, x;
1884 int minrow = MIN(row, term.row);
1885 int mincol = MIN(col, term.col);
1886 int slide = term.c.y - row + 1;
1887
1888 if(col < 1 || row < 1)
1889 return 0;
1890
1891 /* free unneeded rows */
1892 i = 0;
1893 if(slide > 0) {
1894 /* slide screen to keep cursor where we expect it -
1895 * tscrollup would work here, but we can optimize to
1896 * memmove because we're freeing the earlier lines */
1897 for(/* i = 0 */; i < slide; i++) {
1898 free(term.line[i]);
1899 free(term.alt[i]);
1900 }
1901 memmove(term.line, term.line + slide, row * sizeof(Line));
1902 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1903 }
1904 for(i += row; i < term.row; i++) {
1905 free(term.line[i]);
1906 free(term.alt[i]);
1907 }
1908
1909 /* resize to new height */
1910 term.line = xrealloc(term.line, row * sizeof(Line));
1911 term.alt = xrealloc(term.alt, row * sizeof(Line));
1912 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
1913 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
1914
1915 /* resize each row to new width, zero-pad if needed */
1916 for(i = 0; i < minrow; i++) {
1917 term.dirty[i] = 1;
1918 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
1919 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
1920 for(x = mincol; x < col; x++) {
1921 term.line[i][x].state = 0;
1922 term.alt[i][x].state = 0;
1923 }
1924 }
1925
1926 /* allocate any new rows */
1927 for(/* i == minrow */; i < row; i++) {
1928 term.dirty[i] = 1;
1929 term.line[i] = xcalloc(col, sizeof(Glyph));
1930 term.alt [i] = xcalloc(col, sizeof(Glyph));
1931 }
1932 if(col > term.col) {
1933 bool *bp = term.tabs + term.col;
1934
1935 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
1936 while(--bp > term.tabs && !*bp)
1937 /* nothing */ ;
1938 for(bp += TAB; bp < term.tabs + col; bp += TAB)
1939 *bp = 1;
1940 }
1941 /* update terminal size */
1942 term.col = col, term.row = row;
1943 /* make use of the LIMIT in tmoveto */
1944 tmoveto(term.c.x, term.c.y);
1945 /* reset scrolling region */
1946 tsetscroll(0, row-1);
1947
1948 return (slide > 0);
1949 }
1950
1951 void
1952 xresize(int col, int row) {
1953 xw.tw = MAX(1, 2*BORDER + col * xw.cw);
1954 xw.th = MAX(1, 2*BORDER + row * xw.ch);
1955
1956 XftDrawChange(xw.xft_draw, xw.buf);
1957 }
1958
1959 void
1960 xloadcols(void) {
1961 int i, r, g, b;
1962 XRenderColor xft_color = { .alpha = 0 };
1963
1964 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
1965 for(i = 0; i < LEN(colorname); i++) {
1966 if(!colorname[i])
1967 continue;
1968 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.xft_col[i])) {
1969 die("Could not allocate color '%s'\n", colorname[i]);
1970 }
1971 }
1972
1973 /* load colors [16-255] ; same colors as xterm */
1974 for(i = 16, r = 0; r < 6; r++) {
1975 for(g = 0; g < 6; g++) {
1976 for(b = 0; b < 6; b++) {
1977 xft_color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1978 xft_color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1979 xft_color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1980 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &xft_color, &dc.xft_col[i])) {
1981 die("Could not allocate color %d\n", i);
1982 }
1983 i++;
1984 }
1985 }
1986 }
1987
1988 for(r = 0; r < 24; r++, i++) {
1989 xft_color.red = xft_color.green = xft_color.blue = 0x0808 + 0x0a0a * r;
1990 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &xft_color, &dc.xft_col[i])) {
1991 die("Could not allocate color %d\n", i);
1992 }
1993 }
1994 }
1995
1996 void
1997 xtermclear(int col1, int row1, int col2, int row2) {
1998 XftDrawRect(xw.xft_draw,
1999 &dc.xft_col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG],
2000 BORDER + col1 * xw.cw,
2001 BORDER + row1 * xw.ch,
2002 (col2-col1+1) * xw.cw,
2003 (row2-row1+1) * xw.ch);
2004 }
2005
2006 /*
2007 * Absolute coordinates.
2008 */
2009 void
2010 xclear(int x1, int y1, int x2, int y2) {
2011 XftDrawRect(xw.xft_draw,
2012 &dc.xft_col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG],
2013 x1, y1, x2-x1, y2-y1);
2014 }
2015
2016 void
2017 xclearborders(void) {
2018 /* top and left border */
2019 xclear(0, 0, BORDER, xw.h);
2020 xclear(0, 0, xw.w, BORDER);
2021
2022 /* lower and right border */
2023 xclear(BORDER, xw.th - 1, xw.w, xw.h);
2024 /* Will just draw what hasn't been drawn by the previous call. */
2025 xclear(xw.tw - 1, BORDER, xw.w, xw.h - xw.th - 2);
2026 }
2027
2028 void
2029 xhints(void) {
2030 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
2031 XWMHints wm = {.flags = InputHint, .input = 1};
2032 XSizeHints *sizeh = NULL;
2033
2034 sizeh = XAllocSizeHints();
2035 if(xw.isfixed == False) {
2036 sizeh->flags = PSize | PResizeInc | PBaseSize;
2037 sizeh->height = xw.h;
2038 sizeh->width = xw.w;
2039 sizeh->height_inc = xw.ch;
2040 sizeh->width_inc = xw.cw;
2041 sizeh->base_height = 2*BORDER;
2042 sizeh->base_width = 2*BORDER;
2043 } else {
2044 sizeh->flags = PMaxSize | PMinSize;
2045 sizeh->min_width = sizeh->max_width = xw.fw;
2046 sizeh->min_height = sizeh->max_height = xw.fh;
2047 }
2048
2049 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2050 XFree(sizeh);
2051 }
2052
2053 void
2054 xinitfont(Font *f, char *fontstr) {
2055 FcPattern *pattern, *match;
2056 FcResult result;
2057
2058 pattern = FcNameParse((FcChar8 *)fontstr);
2059 if(!pattern)
2060 die("st: can't open font %s\n", fontstr);
2061
2062 match = XftFontMatch(xw.dpy, xw.scr, pattern, &result);
2063 FcPatternDestroy(pattern);
2064 if(!match)
2065 die("st: can't open font %s\n", fontstr);
2066 if(!(f->xft_set = XftFontOpenPattern(xw.dpy, match))) {
2067 FcPatternDestroy(match);
2068 die("st: can't open font %s.\n", fontstr);
2069 }
2070
2071 f->ascent = f->xft_set->ascent;
2072 f->descent = f->xft_set->descent;
2073 f->lbearing = 0;
2074 f->rbearing = f->xft_set->max_advance_width;
2075
2076 f->height = f->xft_set->height;
2077 f->width = f->lbearing + f->rbearing;
2078 }
2079
2080 void
2081 initfonts(char *fontstr) {
2082 char *fstr;
2083
2084 xinitfont(&dc.font, fontstr);
2085 xw.cw = dc.font.width;
2086 xw.ch = dc.font.height;
2087
2088 fstr = smstrcat(fontstr, ":weight=bold", NULL);
2089 xinitfont(&dc.bfont, fstr);
2090 free(fstr);
2091
2092 fstr = smstrcat(fontstr, ":slant=italic,oblique", NULL);
2093 xinitfont(&dc.ifont, fstr);
2094 free(fstr);
2095
2096 fstr = smstrcat(fontstr, ":weight=bold:slant=italic,oblique", NULL);
2097 xinitfont(&dc.ibfont, fstr);
2098 free(fstr);
2099 }
2100
2101 void
2102 xinit(void) {
2103 XSetWindowAttributes attrs;
2104 Cursor cursor;
2105 Window parent;
2106 int sw, sh, major, minor;
2107
2108 if(!(xw.dpy = XOpenDisplay(NULL)))
2109 die("Can't open display\n");
2110 xw.scr = XDefaultScreen(xw.dpy);
2111 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2112
2113 /* font */
2114 initfonts((opt_font != NULL)? opt_font : FONT);
2115
2116 /* colors */
2117 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2118 xloadcols();
2119
2120 /* adjust fixed window geometry */
2121 if(xw.isfixed) {
2122 sw = DisplayWidth(xw.dpy, xw.scr);
2123 sh = DisplayHeight(xw.dpy, xw.scr);
2124 if(xw.fx < 0)
2125 xw.fx = sw + xw.fx - xw.fw - 1;
2126 if(xw.fy < 0)
2127 xw.fy = sh + xw.fy - xw.fh - 1;
2128
2129 xw.h = xw.fh;
2130 xw.w = xw.fw;
2131 } else {
2132 /* window - default size */
2133 xw.h = 2*BORDER + term.row * xw.ch;
2134 xw.w = 2*BORDER + term.col * xw.cw;
2135 xw.fx = 0;
2136 xw.fy = 0;
2137 }
2138
2139 attrs.background_pixel = dc.xft_col[DefaultBG].pixel;
2140 attrs.border_pixel = dc.xft_col[DefaultBG].pixel;
2141 attrs.bit_gravity = NorthWestGravity;
2142 attrs.event_mask = FocusChangeMask | KeyPressMask
2143 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2144 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2145 attrs.colormap = xw.cmap;
2146
2147 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
2148 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2149 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2150 xw.vis,
2151 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2152 | CWColormap,
2153 &attrs);
2154
2155 /* double buffering */
2156 if(!XdbeQueryExtension(xw.dpy, &major, &minor))
2157 die("Xdbe extension is not present\n");
2158 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
2159
2160 /* Xft rendering context */
2161 xw.xft_draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2162
2163 /* input methods */
2164 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
2165 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2166 | XIMStatusNothing, XNClientWindow, xw.win,
2167 XNFocusWindow, xw.win, NULL);
2168 /* gc */
2169 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
2170
2171 /* white cursor, black outline */
2172 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2173 XDefineCursor(xw.dpy, xw.win, cursor);
2174 XRecolorCursor(xw.dpy, cursor,
2175 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2176 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2177
2178 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2179 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2180 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2181
2182 xresettitle();
2183 XMapWindow(xw.dpy, xw.win);
2184 xhints();
2185 XSync(xw.dpy, 0);
2186 }
2187
2188 void
2189 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2190 int winx = BORDER+x*xw.cw, winy = BORDER+y*xw.ch,
2191 width = charlen*xw.cw;
2192 Font *font = &dc.font;
2193 XGlyphInfo extents;
2194 XftColor *fg = &dc.xft_col[base.fg], *bg = &dc.xft_col[base.bg],
2195 *temp, revfg, revbg;
2196 XRenderColor colfg, colbg;
2197
2198 if(base.mode & ATTR_REVERSE)
2199 temp = fg, fg = bg, bg = temp;
2200
2201 if(base.mode & ATTR_BOLD) {
2202 if(BETWEEN(base.fg, 0, 7)) {
2203 /* basic system colors */
2204 fg = &dc.xft_col[base.fg + 8];
2205 } else if(BETWEEN(base.fg, 16, 195)) {
2206 /* 256 colors */
2207 fg = &dc.xft_col[base.fg + 36];
2208 } else if(BETWEEN(base.fg, 232, 251)) {
2209 /* greyscale */
2210 fg = &dc.xft_col[base.fg + 4];
2211 }
2212 /*
2213 * Those ranges will not be brightened:
2214 * 8 - 15 – bright system colors
2215 * 196 - 231 – highest 256 color cube
2216 * 252 - 255 – brightest colors in grescale
2217 */
2218 font = &dc.bfont;
2219 }
2220
2221 if(base.mode & ATTR_ITALIC)
2222 font = &dc.ifont;
2223 if(base.mode & (ATTR_ITALIC|ATTR_ITALIC))
2224 font = &dc.ibfont;
2225
2226 if(IS_SET(MODE_REVERSE)) {
2227 if(fg == &dc.xft_col[DefaultFG]) {
2228 fg = &dc.xft_col[DefaultBG];
2229 } else {
2230 colfg.red = ~fg->color.red;
2231 colfg.green = ~fg->color.green;
2232 colfg.blue = ~fg->color.blue;
2233 colfg.alpha = fg->color.alpha;
2234 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2235 fg = &revfg;
2236 }
2237
2238 if(bg == &dc.xft_col[DefaultBG]) {
2239 bg = &dc.xft_col[DefaultFG];
2240 } else {
2241 colbg.red = ~bg->color.red;
2242 colbg.green = ~bg->color.green;
2243 colbg.blue = ~bg->color.blue;
2244 colbg.alpha = bg->color.alpha;
2245 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2246 bg = &revbg;
2247 }
2248 }
2249
2250 XftTextExtentsUtf8(xw.dpy, font->xft_set, (FcChar8 *)s, bytelen,
2251 &extents);
2252 width = extents.xOff;
2253
2254 XftDrawRect(xw.xft_draw, bg, winx, winy, width, xw.ch);
2255 XftDrawStringUtf8(xw.xft_draw, fg, font->xft_set, winx,
2256 winy + font->ascent, (FcChar8 *)s, bytelen);
2257
2258 if(base.mode & ATTR_UNDERLINE) {
2259 XftDrawRect(xw.xft_draw, fg, winx, winy + font->ascent + 1,
2260 width, 1);
2261 }
2262 }
2263
2264 void
2265 xdrawcursor(void) {
2266 static int oldx = 0;
2267 static int oldy = 0;
2268 int sl;
2269 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
2270
2271 LIMIT(oldx, 0, term.col-1);
2272 LIMIT(oldy, 0, term.row-1);
2273
2274 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2275 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2276
2277 /* remove the old cursor */
2278 if(term.line[oldy][oldx].state & GLYPH_SET) {
2279 sl = utf8size(term.line[oldy][oldx].c);
2280 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
2281 } else
2282 xtermclear(oldx, oldy, oldx, oldy);
2283
2284 /* draw the new one */
2285 if(!(term.c.state & CURSOR_HIDE)) {
2286 if(!(xw.state & WIN_FOCUSED))
2287 g.bg = DefaultUCS;
2288
2289 if(IS_SET(MODE_REVERSE))
2290 g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
2291
2292 sl = utf8size(g.c);
2293 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2294 oldx = term.c.x, oldy = term.c.y;
2295 }
2296 }
2297
2298 void
2299 xresettitle(void) {
2300 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
2301 }
2302
2303 void
2304 redraw(void) {
2305 struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
2306
2307 xclearborders();
2308 tfulldirt();
2309 draw();
2310 XSync(xw.dpy, False); /* necessary for a good tput flash */
2311 nanosleep(&tv, NULL);
2312 }
2313
2314 void
2315 draw(void) {
2316 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2317
2318 drawregion(0, 0, term.col, term.row);
2319 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2320 }
2321
2322 void
2323 drawregion(int x1, int y1, int x2, int y2) {
2324 int ic, ib, x, y, ox, sl;
2325 Glyph base, new;
2326 char buf[DRAW_BUF_SIZ];
2327 bool ena_sel = sel.bx != -1, alt = IS_SET(MODE_ALTSCREEN);
2328
2329 if((sel.alt && !alt) || (!sel.alt && alt))
2330 ena_sel = 0;
2331 if(!(xw.state & WIN_VISIBLE))
2332 return;
2333
2334 for(y = y1; y < y2; y++) {
2335 if(!term.dirty[y])
2336 continue;
2337 xtermclear(0, y, term.col, y);
2338 term.dirty[y] = 0;
2339 base = term.line[y][0];
2340 ic = ib = ox = 0;
2341 for(x = x1; x < x2; x++) {
2342 new = term.line[y][x];
2343 if(ena_sel && *(new.c) && selected(x, y))
2344 new.mode ^= ATTR_REVERSE;
2345 if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
2346 ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2347 xdraws(buf, base, ox, y, ic, ib);
2348 ic = ib = 0;
2349 }
2350 if(new.state & GLYPH_SET) {
2351 if(ib == 0) {
2352 ox = x;
2353 base = new;
2354 }
2355 sl = utf8size(new.c);
2356 memcpy(buf+ib, new.c, sl);
2357 ib += sl;
2358 ++ic;
2359 }
2360 }
2361 if(ib > 0)
2362 xdraws(buf, base, ox, y, ic, ib);
2363 }
2364 xdrawcursor();
2365 }
2366
2367 void
2368 expose(XEvent *ev) {
2369 XExposeEvent *e = &ev->xexpose;
2370 if(xw.state & WIN_REDRAW) {
2371 if(!e->count)
2372 xw.state &= ~WIN_REDRAW;
2373 }
2374 }
2375
2376 void
2377 visibility(XEvent *ev) {
2378 XVisibilityEvent *e = &ev->xvisibility;
2379 if(e->state == VisibilityFullyObscured)
2380 xw.state &= ~WIN_VISIBLE;
2381 else if(!(xw.state & WIN_VISIBLE))
2382 /* need a full redraw for next Expose, not just a buf copy */
2383 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2384 }
2385
2386 void
2387 unmap(XEvent *ev) {
2388 xw.state &= ~WIN_VISIBLE;
2389 }
2390
2391 void
2392 xseturgency(int add) {
2393 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2394 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2395 XSetWMHints(xw.dpy, xw.win, h);
2396 XFree(h);
2397 }
2398
2399 void
2400 focus(XEvent *ev) {
2401 if(ev->type == FocusIn) {
2402 xw.state |= WIN_FOCUSED;
2403 xseturgency(0);
2404 } else
2405 xw.state &= ~WIN_FOCUSED;
2406 }
2407
2408 char*
2409 kmap(KeySym k, uint state) {
2410 int i;
2411 state &= ~Mod2Mask;
2412 for(i = 0; i < LEN(key); i++) {
2413 uint mask = key[i].mask;
2414 if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
2415 return (char*)key[i].s;
2416 }
2417 return NULL;
2418 }
2419
2420 void
2421 kpress(XEvent *ev) {
2422 XKeyEvent *e = &ev->xkey;
2423 KeySym ksym;
2424 char buf[32];
2425 char *customkey;
2426 int len;
2427 int meta;
2428 int shift;
2429 Status status;
2430
2431 if (IS_SET(MODE_KBDLOCK))
2432 return;
2433 meta = e->state & Mod1Mask;
2434 shift = e->state & ShiftMask;
2435 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
2436
2437 /* 1. custom keys from config.h */
2438 if((customkey = kmap(ksym, e->state)))
2439 ttywrite(customkey, strlen(customkey));
2440 /* 2. hardcoded (overrides X lookup) */
2441 else
2442 switch(ksym) {
2443 case XK_Up:
2444 case XK_Down:
2445 case XK_Left:
2446 case XK_Right:
2447 /* XXX: shift up/down doesn't work */
2448 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
2449 ttywrite(buf, 3);
2450 break;
2451 case XK_Insert:
2452 if(shift)
2453 selpaste();
2454 break;
2455 case XK_Return:
2456 if(IS_SET(MODE_CRLF))
2457 ttywrite("\r\n", 2);
2458 else
2459 ttywrite("\r", 1);
2460 break;
2461 /* 3. X lookup */
2462 default:
2463 if(len > 0) {
2464 if(meta && len == 1)
2465 ttywrite("\033", 1);
2466 ttywrite(buf, len);
2467 }
2468 break;
2469 }
2470 }
2471
2472 void
2473 cmessage(XEvent *e) {
2474 /* See xembed specs
2475 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2476 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2477 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2478 xw.state |= WIN_FOCUSED;
2479 xseturgency(0);
2480 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2481 xw.state &= ~WIN_FOCUSED;
2482 }
2483 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
2484 /* Send SIGHUP to shell */
2485 kill(pid, SIGHUP);
2486 exit(EXIT_SUCCESS);
2487 }
2488 }
2489
2490 void
2491 resize(XEvent *e) {
2492 int col, row;
2493
2494 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2495 return;
2496
2497 xw.w = e->xconfigure.width;
2498 xw.h = e->xconfigure.height;
2499 col = (xw.w - 2*BORDER) / xw.cw;
2500 row = (xw.h - 2*BORDER) / xw.ch;
2501 if(col == term.col && row == term.row)
2502 return;
2503
2504 tresize(col, row);
2505 xresize(col, row);
2506 xclearborders();
2507 ttyresize();
2508 }
2509
2510 void
2511 run(void) {
2512 XEvent ev;
2513 fd_set rfd;
2514 int xfd = XConnectionNumber(xw.dpy), i;
2515 struct timeval drawtimeout, *tv = NULL;
2516
2517 for(i = 0;; i++) {
2518 FD_ZERO(&rfd);
2519 FD_SET(cmdfd, &rfd);
2520 FD_SET(xfd, &rfd);
2521 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
2522 if(errno == EINTR)
2523 continue;
2524 die("select failed: %s\n", SERRNO);
2525 }
2526
2527 /*
2528 * Stop after a certain number of reads so the user does not
2529 * feel like the system is stuttering.
2530 */
2531 if(i < 1000 && FD_ISSET(cmdfd, &rfd)) {
2532 ttyread();
2533
2534 /*
2535 * Just wait a bit so it isn't disturbing the
2536 * user and the system is able to write something.
2537 */
2538 drawtimeout.tv_sec = 0;
2539 drawtimeout.tv_usec = 5;
2540 tv = &drawtimeout;
2541 continue;
2542 }
2543 i = 0;
2544 tv = NULL;
2545
2546 while(XPending(xw.dpy)) {
2547 XNextEvent(xw.dpy, &ev);
2548 if(XFilterEvent(&ev, xw.win))
2549 continue;
2550 if(handler[ev.type])
2551 (handler[ev.type])(&ev);
2552 }
2553
2554 draw();
2555 XFlush(xw.dpy);
2556 }
2557 }
2558
2559 int
2560 main(int argc, char *argv[]) {
2561 int i, bitm, xr, yr;
2562 uint wr, hr;
2563
2564 xw.fw = xw.fh = xw.fx = xw.fy = 0;
2565 xw.isfixed = False;
2566
2567 for(i = 1; i < argc; i++) {
2568 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2569 case 'c':
2570 if(++i < argc)
2571 opt_class = argv[i];
2572 break;
2573 case 'e':
2574 /* eat every remaining arguments */
2575 if(++i < argc)
2576 opt_cmd = &argv[i];
2577 goto run;
2578 case 'f':
2579 if(++i < argc)
2580 opt_font = argv[i];
2581 break;
2582 case 'g':
2583 if(++i >= argc)
2584 break;
2585
2586 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
2587 if(bitm & XValue)
2588 xw.fx = xr;
2589 if(bitm & YValue)
2590 xw.fy = yr;
2591 if(bitm & WidthValue)
2592 xw.fw = (int)wr;
2593 if(bitm & HeightValue)
2594 xw.fh = (int)hr;
2595 if(bitm & XNegative && xw.fx == 0)
2596 xw.fx = -1;
2597 if(bitm & XNegative && xw.fy == 0)
2598 xw.fy = -1;
2599
2600 if(xw.fh != 0 && xw.fw != 0)
2601 xw.isfixed = True;
2602 break;
2603 case 'o':
2604 if(++i < argc)
2605 opt_io = argv[i];
2606 break;
2607 case 't':
2608 if(++i < argc)
2609 opt_title = argv[i];
2610 break;
2611 case 'v':
2612 default:
2613 die(USAGE);
2614 case 'w':
2615 if(++i < argc)
2616 opt_embed = argv[i];
2617 break;
2618 }
2619 }
2620
2621 run:
2622 setlocale(LC_CTYPE, "");
2623 tnew(80, 24);
2624 ttynew();
2625 xinit();
2626 selinit();
2627 run();
2628 return 0;
2629 }
2630