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8e1afe29441d209e5173c5e36e194c0c0eee3878
[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
29 #if defined(__linux)
30 #include <pty.h>
31 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
32 #include <util.h>
33 #elif defined(__FreeBSD__) || defined(__DragonFly__)
34 #include <libutil.h>
35 #endif
36
37 #define USAGE \
38 "st " VERSION " (c) 2010-2012 st engineers\n" \
39 "usage: st [-t title] [-c class] [-w windowid] [-v] [-e command...]\n"
40
41 /* XEMBED messages */
42 #define XEMBED_FOCUS_IN 4
43 #define XEMBED_FOCUS_OUT 5
44
45 /* Arbitrary sizes */
46 #define ESC_BUF_SIZ 256
47 #define ESC_ARG_SIZ 16
48 #define STR_BUF_SIZ 256
49 #define STR_ARG_SIZ 16
50 #define DRAW_BUF_SIZ 1024
51 #define UTF_SIZ 4
52 #define XK_NO_MOD UINT_MAX
53 #define XK_ANY_MOD 0
54
55 #define SELECT_TIMEOUT (20*1000) /* 20 ms */
56 #define DRAW_TIMEOUT (20*1000) /* 20 ms */
57
58 #define SERRNO strerror(errno)
59 #define MIN(a, b) ((a) < (b) ? (a) : (b))
60 #define MAX(a, b) ((a) < (b) ? (b) : (a))
61 #define LEN(a) (sizeof(a) / sizeof(a[0]))
62 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
63 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
64 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
65 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
66 #define IS_SET(flag) (term.mode & (flag))
67 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
68 #define X2COL(x) (((x) - BORDER)/xw.cw)
69 #define Y2ROW(y) (((y) - BORDER)/xw.ch)
70
71 enum glyph_attribute {
72 ATTR_NULL = 0,
73 ATTR_REVERSE = 1,
74 ATTR_UNDERLINE = 2,
75 ATTR_BOLD = 4,
76 ATTR_GFX = 8,
77 };
78
79 enum cursor_movement {
80 CURSOR_UP,
81 CURSOR_DOWN,
82 CURSOR_LEFT,
83 CURSOR_RIGHT,
84 CURSOR_SAVE,
85 CURSOR_LOAD
86 };
87
88 enum cursor_state {
89 CURSOR_DEFAULT = 0,
90 CURSOR_HIDE = 1,
91 CURSOR_WRAPNEXT = 2
92 };
93
94 enum glyph_state {
95 GLYPH_SET = 1,
96 GLYPH_DIRTY = 2
97 };
98
99 enum term_mode {
100 MODE_WRAP = 1,
101 MODE_INSERT = 2,
102 MODE_APPKEYPAD = 4,
103 MODE_ALTSCREEN = 8,
104 MODE_CRLF = 16,
105 MODE_MOUSEBTN = 32,
106 MODE_MOUSEMOTION = 64,
107 MODE_MOUSE = 32|64,
108 MODE_REVERSE = 128
109 };
110
111 enum escape_state {
112 ESC_START = 1,
113 ESC_CSI = 2,
114 ESC_STR = 4, /* DSC, OSC, PM, APC */
115 ESC_ALTCHARSET = 8,
116 ESC_STR_END = 16, /* a final string was encountered */
117 };
118
119 enum window_state {
120 WIN_VISIBLE = 1,
121 WIN_REDRAW = 2,
122 WIN_FOCUSED = 4
123 };
124
125 /* bit macro */
126 #undef B0
127 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
128
129 typedef unsigned char uchar;
130 typedef unsigned int uint;
131 typedef unsigned long ulong;
132 typedef unsigned short ushort;
133
134 typedef struct {
135 char c[UTF_SIZ]; /* character code */
136 uchar mode; /* attribute flags */
137 ushort fg; /* foreground */
138 ushort bg; /* background */
139 uchar state; /* state flags */
140 } Glyph;
141
142 typedef Glyph* Line;
143
144 typedef struct {
145 Glyph attr; /* current char attributes */
146 int x;
147 int y;
148 char state;
149 } TCursor;
150
151 /* CSI Escape sequence structs */
152 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
153 typedef struct {
154 char buf[ESC_BUF_SIZ]; /* raw string */
155 int len; /* raw string length */
156 char priv;
157 int arg[ESC_ARG_SIZ];
158 int narg; /* nb of args */
159 char mode;
160 } CSIEscape;
161
162 /* STR Escape sequence structs */
163 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
164 typedef struct {
165 char type; /* ESC type ... */
166 char buf[STR_BUF_SIZ]; /* raw string */
167 int len; /* raw string length */
168 char *args[STR_ARG_SIZ];
169 int narg; /* nb of args */
170 } STREscape;
171
172 /* Internal representation of the screen */
173 typedef struct {
174 int row; /* nb row */
175 int col; /* nb col */
176 Line* line; /* screen */
177 Line* alt; /* alternate screen */
178 bool* dirty; /* dirtyness of lines */
179 TCursor c; /* cursor */
180 int top; /* top scroll limit */
181 int bot; /* bottom scroll limit */
182 int mode; /* terminal mode flags */
183 int esc; /* escape state flags */
184 bool *tabs;
185 } Term;
186
187 /* Purely graphic info */
188 typedef struct {
189 Display* dpy;
190 Colormap cmap;
191 Window win;
192 XdbeBackBuffer buf;
193 Atom xembed;
194 XIM xim;
195 XIC xic;
196 int scr;
197 int w; /* window width */
198 int h; /* window height */
199 int ch; /* char height */
200 int cw; /* char width */
201 char state; /* focus, redraw, visible */
202 struct timeval lastdraw;
203 } XWindow;
204
205 typedef struct {
206 KeySym k;
207 uint mask;
208 char s[ESC_BUF_SIZ];
209 } Key;
210
211
212 /* TODO: use better name for vars... */
213 typedef struct {
214 int mode;
215 int bx, by;
216 int ex, ey;
217 struct {int x, y;} b, e;
218 char *clip;
219 Atom xtarget;
220 struct timeval tclick1;
221 struct timeval tclick2;
222 } Selection;
223
224 #include "config.h"
225
226 /* Drawing Context */
227 typedef struct {
228 ulong col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
229 GC gc;
230 struct {
231 int ascent;
232 int descent;
233 short lbearing;
234 short rbearing;
235 XFontSet set;
236 } font, bfont;
237 } DC;
238
239 static void die(const char*, ...);
240 static void draw(void);
241 static void drawregion(int, int, int, int);
242 static void execsh(void);
243 static void sigchld(int);
244 static void run(void);
245 static bool last_draw_too_old(void);
246
247 static void csidump(void);
248 static void csihandle(void);
249 static void csiparse(void);
250 static void csireset(void);
251 static void strdump(void);
252 static void strhandle(void);
253 static void strparse(void);
254 static void strreset(void);
255
256 static void tclearregion(int, int, int, int);
257 static void tcursor(int);
258 static void tdeletechar(int);
259 static void tdeleteline(int);
260 static void tinsertblank(int);
261 static void tinsertblankline(int);
262 static void tmoveto(int, int);
263 static void tnew(int, int);
264 static void tnewline(int);
265 static void tputtab(bool);
266 static void tputc(char*);
267 static void treset(void);
268 static int tresize(int, int);
269 static void tscrollup(int, int);
270 static void tscrolldown(int, int);
271 static void tsetattr(int*, int);
272 static void tsetchar(char*);
273 static void tsetscroll(int, int);
274 static void tswapscreen(void);
275 static void tsetdirt(int, int);
276 static void tsetmode(bool, bool, int *, int);
277 static void tfulldirt(void);
278
279 static void ttynew(void);
280 static void ttyread(void);
281 static void ttyresize(int, int);
282 static void ttywrite(const char *, size_t);
283
284 static void xdraws(char *, Glyph, int, int, int, int);
285 static void xhints(void);
286 static void xclear(int, int, int, int);
287 static void xcopy();
288 static void xdrawcursor(void);
289 static void xinit(void);
290 static void xloadcols(void);
291 static void xseturgency(int);
292 static void xsetsel(char*);
293 static void xresize(int, int);
294
295 static void expose(XEvent *);
296 static void visibility(XEvent *);
297 static void unmap(XEvent *);
298 static char* kmap(KeySym, uint);
299 static void kpress(XEvent *);
300 static void cmessage(XEvent *);
301 static void resize(XEvent *);
302 static void focus(XEvent *);
303 static void brelease(XEvent *);
304 static void bpress(XEvent *);
305 static void bmotion(XEvent *);
306 static void selnotify(XEvent *);
307 static void selrequest(XEvent *);
308
309 static void selinit(void);
310 static inline bool selected(int, int);
311 static void selcopy(void);
312 static void selpaste();
313 static void selscroll(int, int);
314
315 static int utf8decode(char *, long *);
316 static int utf8encode(long *, char *);
317 static int utf8size(char *);
318 static int isfullutf8(char *, int);
319
320 static void (*handler[LASTEvent])(XEvent *) = {
321 [KeyPress] = kpress,
322 [ClientMessage] = cmessage,
323 [ConfigureNotify] = resize,
324 [VisibilityNotify] = visibility,
325 [UnmapNotify] = unmap,
326 [Expose] = expose,
327 [FocusIn] = focus,
328 [FocusOut] = focus,
329 [MotionNotify] = bmotion,
330 [ButtonPress] = bpress,
331 [ButtonRelease] = brelease,
332 [SelectionNotify] = selnotify,
333 [SelectionRequest] = selrequest,
334 };
335
336 /* Globals */
337 static DC dc;
338 static XWindow xw;
339 static Term term;
340 static CSIEscape csiescseq;
341 static STREscape strescseq;
342 static int cmdfd;
343 static pid_t pid;
344 static Selection sel;
345 static char **opt_cmd = NULL;
346 static char *opt_title = NULL;
347 static char *opt_embed = NULL;
348 static char *opt_class = NULL;
349
350 int
351 utf8decode(char *s, long *u) {
352 uchar c;
353 int i, n, rtn;
354
355 rtn = 1;
356 c = *s;
357 if(~c & B7) { /* 0xxxxxxx */
358 *u = c;
359 return rtn;
360 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
361 *u = c&(B4|B3|B2|B1|B0);
362 n = 1;
363 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
364 *u = c&(B3|B2|B1|B0);
365 n = 2;
366 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
367 *u = c & (B2|B1|B0);
368 n = 3;
369 } else
370 goto invalid;
371 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
372 c = *s;
373 if((c & (B7|B6)) != B7) /* 10xxxxxx */
374 goto invalid;
375 *u <<= 6;
376 *u |= c & (B5|B4|B3|B2|B1|B0);
377 }
378 if((n == 1 && *u < 0x80) ||
379 (n == 2 && *u < 0x800) ||
380 (n == 3 && *u < 0x10000) ||
381 (*u >= 0xD800 && *u <= 0xDFFF))
382 goto invalid;
383 return rtn;
384 invalid:
385 *u = 0xFFFD;
386 return rtn;
387 }
388
389 int
390 utf8encode(long *u, char *s) {
391 uchar *sp;
392 ulong uc;
393 int i, n;
394
395 sp = (uchar*) s;
396 uc = *u;
397 if(uc < 0x80) {
398 *sp = uc; /* 0xxxxxxx */
399 return 1;
400 } else if(*u < 0x800) {
401 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
402 n = 1;
403 } else if(uc < 0x10000) {
404 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
405 n = 2;
406 } else if(uc <= 0x10FFFF) {
407 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
408 n = 3;
409 } else {
410 goto invalid;
411 }
412 for(i=n,++sp; i>0; --i,++sp)
413 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
414 return n+1;
415 invalid:
416 /* U+FFFD */
417 *s++ = '\xEF';
418 *s++ = '\xBF';
419 *s = '\xBD';
420 return 3;
421 }
422
423 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
424 UTF-8 otherwise return 0 */
425 int
426 isfullutf8(char *s, int b) {
427 uchar *c1, *c2, *c3;
428
429 c1 = (uchar *) s;
430 c2 = (uchar *) ++s;
431 c3 = (uchar *) ++s;
432 if(b < 1)
433 return 0;
434 else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
435 return 0;
436 else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
437 ((b == 1) ||
438 ((b == 2) && (*c2&(B7|B6)) == B7)))
439 return 0;
440 else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
441 ((b == 1) ||
442 ((b == 2) && (*c2&(B7|B6)) == B7) ||
443 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7)))
444 return 0;
445 else
446 return 1;
447 }
448
449 int
450 utf8size(char *s) {
451 uchar c = *s;
452
453 if(~c&B7)
454 return 1;
455 else if((c&(B7|B6|B5)) == (B7|B6))
456 return 2;
457 else if((c&(B7|B6|B5|B4)) == (B7|B6|B5))
458 return 3;
459 else
460 return 4;
461 }
462
463 void
464 selinit(void) {
465 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
466 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
467 sel.mode = 0;
468 sel.bx = -1;
469 sel.clip = NULL;
470 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
471 if(sel.xtarget == None)
472 sel.xtarget = XA_STRING;
473 }
474
475 static inline bool
476 selected(int x, int y) {
477 if(sel.ey == y && sel.by == y) {
478 int bx = MIN(sel.bx, sel.ex);
479 int ex = MAX(sel.bx, sel.ex);
480 return BETWEEN(x, bx, ex);
481 }
482 return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
483 || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
484 }
485
486 void
487 getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
488 if(b)
489 *b = e->xbutton.button;
490
491 *x = X2COL(e->xbutton.x);
492 *y = Y2ROW(e->xbutton.y);
493 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
494 sel.b.y = MIN(sel.by, sel.ey);
495 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
496 sel.e.y = MAX(sel.by, sel.ey);
497 }
498
499 void
500 mousereport(XEvent *e) {
501 int x = X2COL(e->xbutton.x);
502 int y = Y2ROW(e->xbutton.y);
503 int button = e->xbutton.button;
504 int state = e->xbutton.state;
505 char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
506 static int ob, ox, oy;
507
508 /* from urxvt */
509 if(e->xbutton.type == MotionNotify) {
510 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
511 return;
512 button = ob + 32;
513 ox = x, oy = y;
514 } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
515 button = 3;
516 } else {
517 button -= Button1;
518 if(button >= 3)
519 button += 64 - 3;
520 if(e->xbutton.type == ButtonPress) {
521 ob = button;
522 ox = x, oy = y;
523 }
524 }
525
526 buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
527 + (state & Mod4Mask ? 8 : 0)
528 + (state & ControlMask ? 16 : 0);
529
530 ttywrite(buf, sizeof(buf));
531 }
532
533 void
534 bpress(XEvent *e) {
535 if(IS_SET(MODE_MOUSE))
536 mousereport(e);
537 else if(e->xbutton.button == Button1) {
538 if(sel.bx != -1)
539 tsetdirt(sel.b.y, sel.e.y);
540 sel.mode = 1;
541 sel.ex = sel.bx = X2COL(e->xbutton.x);
542 sel.ey = sel.by = Y2ROW(e->xbutton.y);
543 }
544 }
545
546 void
547 selcopy(void) {
548 char *str, *ptr;
549 int x, y, bufsize, is_selected = 0;
550
551 if(sel.bx == -1)
552 str = NULL;
553
554 else {
555 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
556 ptr = str = malloc(bufsize);
557
558 /* append every set & selected glyph to the selection */
559 for(y = 0; y < term.row; y++) {
560 for(x = 0; x < term.col; x++) {
561 is_selected = selected(x, y);
562 if((term.line[y][x].state & GLYPH_SET) && is_selected) {
563 int size = utf8size(term.line[y][x].c);
564 memcpy(ptr, term.line[y][x].c, size);
565 ptr += size;
566 }
567 }
568
569 /* \n at the end of every selected line except for the last one */
570 if(is_selected && y < sel.e.y)
571 *ptr++ = '\n';
572 }
573 *ptr = 0;
574 }
575 xsetsel(str);
576 }
577
578 void
579 selnotify(XEvent *e) {
580 ulong nitems, ofs, rem;
581 int format;
582 uchar *data;
583 Atom type;
584
585 ofs = 0;
586 do {
587 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
588 False, AnyPropertyType, &type, &format,
589 &nitems, &rem, &data)) {
590 fprintf(stderr, "Clipboard allocation failed\n");
591 return;
592 }
593 ttywrite((const char *) data, nitems * format / 8);
594 XFree(data);
595 /* number of 32-bit chunks returned */
596 ofs += nitems * format / 32;
597 } while(rem > 0);
598 }
599
600 void
601 selpaste() {
602 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY, xw.win, CurrentTime);
603 }
604
605 void
606 selrequest(XEvent *e) {
607 XSelectionRequestEvent *xsre;
608 XSelectionEvent xev;
609 Atom xa_targets;
610
611 xsre = (XSelectionRequestEvent *) e;
612 xev.type = SelectionNotify;
613 xev.requestor = xsre->requestor;
614 xev.selection = xsre->selection;
615 xev.target = xsre->target;
616 xev.time = xsre->time;
617 /* reject */
618 xev.property = None;
619
620 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
621 if(xsre->target == xa_targets) {
622 /* respond with the supported type */
623 Atom string = sel.xtarget;
624 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
625 XA_ATOM, 32, PropModeReplace,
626 (uchar *) &string, 1);
627 xev.property = xsre->property;
628 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
629 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
630 xsre->target, 8, PropModeReplace,
631 (uchar *) sel.clip, strlen(sel.clip));
632 xev.property = xsre->property;
633 }
634
635 /* all done, send a notification to the listener */
636 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
637 fprintf(stderr, "Error sending SelectionNotify event\n");
638 }
639
640 void
641 xsetsel(char *str) {
642 /* register the selection for both the clipboard and the primary */
643 Atom clipboard;
644
645 free(sel.clip);
646 sel.clip = str;
647
648 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
649
650 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
651 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
652
653 XFlush(xw.dpy);
654 }
655
656 void
657 brelease(XEvent *e) {
658 if(IS_SET(MODE_MOUSE)) {
659 mousereport(e);
660 return;
661 }
662 if(e->xbutton.button == Button2)
663 selpaste();
664 else if(e->xbutton.button == Button1) {
665 sel.mode = 0;
666 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
667 term.dirty[sel.ey] = 1;
668 if(sel.bx == sel.ex && sel.by == sel.ey) {
669 struct timeval now;
670 sel.bx = -1;
671 gettimeofday(&now, NULL);
672
673 if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
674 /* triple click on the line */
675 sel.b.x = sel.bx = 0;
676 sel.e.x = sel.ex = term.col;
677 sel.b.y = sel.e.y = sel.ey;
678 selcopy();
679 } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
680 /* double click to select word */
681 sel.bx = sel.ex;
682 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
683 term.line[sel.ey][sel.bx-1].c[0] != ' ') sel.bx--;
684 sel.b.x = sel.bx;
685 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
686 term.line[sel.ey][sel.ex+1].c[0] != ' ') sel.ex++;
687 sel.e.x = sel.ex;
688 sel.b.y = sel.e.y = sel.ey;
689 selcopy();
690 }
691 } else
692 selcopy();
693 }
694 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
695 gettimeofday(&sel.tclick1, NULL);
696 draw();
697 }
698
699 void
700 bmotion(XEvent *e) {
701 if(IS_SET(MODE_MOUSE)) {
702 mousereport(e);
703 return;
704 }
705 if(sel.mode) {
706 int oldey = sel.ey, oldex = sel.ex;
707 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
708
709 if(oldey != sel.ey || oldex != sel.ex) {
710 int starty = MIN(oldey, sel.ey);
711 int endy = MAX(oldey, sel.ey);
712 tsetdirt(starty, endy);
713 draw();
714 }
715 }
716 }
717
718 void
719 die(const char *errstr, ...) {
720 va_list ap;
721
722 va_start(ap, errstr);
723 vfprintf(stderr, errstr, ap);
724 va_end(ap);
725 exit(EXIT_FAILURE);
726 }
727
728 void
729 execsh(void) {
730 char **args;
731 char *envshell = getenv("SHELL");
732
733 DEFAULT(envshell, SHELL);
734 putenv("TERM="TNAME);
735 args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
736 execvp(args[0], args);
737 exit(EXIT_FAILURE);
738 }
739
740 void
741 sigchld(int a) {
742 int stat = 0;
743 if(waitpid(pid, &stat, 0) < 0)
744 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
745 if(WIFEXITED(stat))
746 exit(WEXITSTATUS(stat));
747 else
748 exit(EXIT_FAILURE);
749 }
750
751 void
752 ttynew(void) {
753 int m, s;
754
755 /* seems to work fine on linux, openbsd and freebsd */
756 struct winsize w = {term.row, term.col, 0, 0};
757 if(openpty(&m, &s, NULL, NULL, &w) < 0)
758 die("openpty failed: %s\n", SERRNO);
759
760 switch(pid = fork()) {
761 case -1:
762 die("fork failed\n");
763 break;
764 case 0:
765 setsid(); /* create a new process group */
766 dup2(s, STDIN_FILENO);
767 dup2(s, STDOUT_FILENO);
768 dup2(s, STDERR_FILENO);
769 if(ioctl(s, TIOCSCTTY, NULL) < 0)
770 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
771 close(s);
772 close(m);
773 execsh();
774 break;
775 default:
776 close(s);
777 cmdfd = m;
778 signal(SIGCHLD, sigchld);
779 }
780 }
781
782 void
783 dump(char c) {
784 static int col;
785 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
786 if(++col % 10 == 0)
787 fprintf(stderr, "\n");
788 }
789
790 void
791 ttyread(void) {
792 static char buf[BUFSIZ];
793 static int buflen = 0;
794 char *ptr;
795 char s[UTF_SIZ];
796 int charsize; /* size of utf8 char in bytes */
797 long utf8c;
798 int ret;
799
800 /* append read bytes to unprocessed bytes */
801 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
802 die("Couldn't read from shell: %s\n", SERRNO);
803
804 /* process every complete utf8 char */
805 buflen += ret;
806 ptr = buf;
807 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
808 charsize = utf8decode(ptr, &utf8c);
809 utf8encode(&utf8c, s);
810 tputc(s);
811 ptr += charsize;
812 buflen -= charsize;
813 }
814
815 /* keep any uncomplete utf8 char for the next call */
816 memmove(buf, ptr, buflen);
817 }
818
819 void
820 ttywrite(const char *s, size_t n) {
821 if(write(cmdfd, s, n) == -1)
822 die("write error on tty: %s\n", SERRNO);
823 }
824
825 void
826 ttyresize(int x, int y) {
827 struct winsize w;
828
829 w.ws_row = term.row;
830 w.ws_col = term.col;
831 w.ws_xpixel = w.ws_ypixel = 0;
832 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
833 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
834 }
835
836 void
837 tsetdirt(int top, int bot)
838 {
839 int i;
840
841 LIMIT(top, 0, term.row-1);
842 LIMIT(bot, 0, term.row-1);
843
844 for(i = top; i <= bot; i++)
845 term.dirty[i] = 1;
846 }
847
848 void
849 tfulldirt(void)
850 {
851 tsetdirt(0, term.row-1);
852 }
853
854 void
855 tcursor(int mode) {
856 static TCursor c;
857
858 if(mode == CURSOR_SAVE)
859 c = term.c;
860 else if(mode == CURSOR_LOAD)
861 term.c = c, tmoveto(c.x, c.y);
862 }
863
864 void
865 treset(void) {
866 unsigned i;
867 term.c = (TCursor){{
868 .mode = ATTR_NULL,
869 .fg = DefaultFG,
870 .bg = DefaultBG
871 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
872
873 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
874 for (i = TAB; i < term.col; i += TAB)
875 term.tabs[i] = 1;
876 term.top = 0, term.bot = term.row - 1;
877 term.mode = MODE_WRAP;
878 tclearregion(0, 0, term.col-1, term.row-1);
879 }
880
881 void
882 tnew(int col, int row) {
883 /* set screen size */
884 term.row = row, term.col = col;
885 term.line = malloc(term.row * sizeof(Line));
886 term.alt = malloc(term.row * sizeof(Line));
887 term.dirty = malloc(term.row * sizeof(*term.dirty));
888 term.tabs = malloc(term.col * sizeof(*term.tabs));
889
890 for(row = 0; row < term.row; row++) {
891 term.line[row] = malloc(term.col * sizeof(Glyph));
892 term.alt [row] = malloc(term.col * sizeof(Glyph));
893 term.dirty[row] = 0;
894 }
895 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
896 /* setup screen */
897 treset();
898 }
899
900 void
901 tswapscreen(void) {
902 Line* tmp = term.line;
903 term.line = term.alt;
904 term.alt = tmp;
905 term.mode ^= MODE_ALTSCREEN;
906 tfulldirt();
907 }
908
909 void
910 tscrolldown(int orig, int n) {
911 int i;
912 Line temp;
913
914 LIMIT(n, 0, term.bot-orig+1);
915
916 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
917
918 for(i = term.bot; i >= orig+n; i--) {
919 temp = term.line[i];
920 term.line[i] = term.line[i-n];
921 term.line[i-n] = temp;
922
923 term.dirty[i] = 1;
924 term.dirty[i-n] = 1;
925 }
926
927 selscroll(orig, n);
928 }
929
930 void
931 tscrollup(int orig, int n) {
932 int i;
933 Line temp;
934 LIMIT(n, 0, term.bot-orig+1);
935
936 tclearregion(0, orig, term.col-1, orig+n-1);
937
938 for(i = orig; i <= term.bot-n; i++) {
939 temp = term.line[i];
940 term.line[i] = term.line[i+n];
941 term.line[i+n] = temp;
942
943 term.dirty[i] = 1;
944 term.dirty[i+n] = 1;
945 }
946
947 selscroll(orig, -n);
948 }
949
950 void
951 selscroll(int orig, int n) {
952 if(sel.bx == -1)
953 return;
954
955 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
956 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
957 sel.bx = -1;
958 return;
959 }
960 if(sel.by < term.top) {
961 sel.by = term.top;
962 sel.bx = 0;
963 }
964 if(sel.ey > term.bot) {
965 sel.ey = term.bot;
966 sel.ex = term.col;
967 }
968 sel.b.y = sel.by, sel.b.x = sel.bx;
969 sel.e.y = sel.ey, sel.e.x = sel.ex;
970 }
971 }
972
973 void
974 tnewline(int first_col) {
975 int y = term.c.y;
976 if(y == term.bot)
977 tscrollup(term.top, 1);
978 else
979 y++;
980 tmoveto(first_col ? 0 : term.c.x, y);
981 }
982
983 void
984 csiparse(void) {
985 /* int noarg = 1; */
986 char *p = csiescseq.buf;
987
988 csiescseq.narg = 0;
989 if(*p == '?')
990 csiescseq.priv = 1, p++;
991
992 while(p < csiescseq.buf+csiescseq.len) {
993 while(isdigit(*p)) {
994 csiescseq.arg[csiescseq.narg] *= 10;
995 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
996 }
997 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ)
998 csiescseq.narg++, p++;
999 else {
1000 csiescseq.mode = *p;
1001 csiescseq.narg++;
1002 return;
1003 }
1004 }
1005 }
1006
1007 void
1008 tmoveto(int x, int y) {
1009 LIMIT(x, 0, term.col-1);
1010 LIMIT(y, 0, term.row-1);
1011 term.c.state &= ~CURSOR_WRAPNEXT;
1012 term.c.x = x;
1013 term.c.y = y;
1014 }
1015
1016 void
1017 tsetchar(char *c) {
1018 term.dirty[term.c.y] = 1;
1019 term.line[term.c.y][term.c.x] = term.c.attr;
1020 memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
1021 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
1022 }
1023
1024 void
1025 tclearregion(int x1, int y1, int x2, int y2) {
1026 int x, y, temp;
1027
1028 if(x1 > x2)
1029 temp = x1, x1 = x2, x2 = temp;
1030 if(y1 > y2)
1031 temp = y1, y1 = y2, y2 = temp;
1032
1033 LIMIT(x1, 0, term.col-1);
1034 LIMIT(x2, 0, term.col-1);
1035 LIMIT(y1, 0, term.row-1);
1036 LIMIT(y2, 0, term.row-1);
1037
1038 for(y = y1; y <= y2; y++) {
1039 term.dirty[y] = 1;
1040 for(x = x1; x <= x2; x++)
1041 term.line[y][x].state = 0;
1042 }
1043 }
1044
1045 void
1046 tdeletechar(int n) {
1047 int src = term.c.x + n;
1048 int dst = term.c.x;
1049 int size = term.col - src;
1050
1051 term.dirty[term.c.y] = 1;
1052
1053 if(src >= term.col) {
1054 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1055 return;
1056 }
1057 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1058 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1059 }
1060
1061 void
1062 tinsertblank(int n) {
1063 int src = term.c.x;
1064 int dst = src + n;
1065 int size = term.col - dst;
1066
1067 term.dirty[term.c.y] = 1;
1068
1069 if(dst >= term.col) {
1070 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1071 return;
1072 }
1073 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1074 tclearregion(src, term.c.y, dst - 1, term.c.y);
1075 }
1076
1077 void
1078 tinsertblankline(int n) {
1079 if(term.c.y < term.top || term.c.y > term.bot)
1080 return;
1081
1082 tscrolldown(term.c.y, n);
1083 }
1084
1085 void
1086 tdeleteline(int n) {
1087 if(term.c.y < term.top || term.c.y > term.bot)
1088 return;
1089
1090 tscrollup(term.c.y, n);
1091 }
1092
1093 void
1094 tsetattr(int *attr, int l) {
1095 int i;
1096
1097 for(i = 0; i < l; i++) {
1098 switch(attr[i]) {
1099 case 0:
1100 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
1101 term.c.attr.fg = DefaultFG;
1102 term.c.attr.bg = DefaultBG;
1103 break;
1104 case 1:
1105 term.c.attr.mode |= ATTR_BOLD;
1106 break;
1107 case 4:
1108 term.c.attr.mode |= ATTR_UNDERLINE;
1109 break;
1110 case 7:
1111 term.c.attr.mode |= ATTR_REVERSE;
1112 break;
1113 case 22:
1114 term.c.attr.mode &= ~ATTR_BOLD;
1115 break;
1116 case 24:
1117 term.c.attr.mode &= ~ATTR_UNDERLINE;
1118 break;
1119 case 27:
1120 term.c.attr.mode &= ~ATTR_REVERSE;
1121 break;
1122 case 38:
1123 if(i + 2 < l && attr[i + 1] == 5) {
1124 i += 2;
1125 if(BETWEEN(attr[i], 0, 255))
1126 term.c.attr.fg = attr[i];
1127 else
1128 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
1129 }
1130 else
1131 fprintf(stderr, "erresc(38): gfx attr %d unknown\n", attr[i]);
1132 break;
1133 case 39:
1134 term.c.attr.fg = DefaultFG;
1135 break;
1136 case 48:
1137 if(i + 2 < l && attr[i + 1] == 5) {
1138 i += 2;
1139 if(BETWEEN(attr[i], 0, 255))
1140 term.c.attr.bg = attr[i];
1141 else
1142 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
1143 }
1144 else
1145 fprintf(stderr, "erresc(48): gfx attr %d unknown\n", attr[i]);
1146 break;
1147 case 49:
1148 term.c.attr.bg = DefaultBG;
1149 break;
1150 default:
1151 if(BETWEEN(attr[i], 30, 37))
1152 term.c.attr.fg = attr[i] - 30;
1153 else if(BETWEEN(attr[i], 40, 47))
1154 term.c.attr.bg = attr[i] - 40;
1155 else if(BETWEEN(attr[i], 90, 97))
1156 term.c.attr.fg = attr[i] - 90 + 8;
1157 else if(BETWEEN(attr[i], 100, 107))
1158 term.c.attr.fg = attr[i] - 100 + 8;
1159 else
1160 fprintf(stderr, "erresc(default): gfx attr %d unknown\n", attr[i]), csidump();
1161 break;
1162 }
1163 }
1164 }
1165
1166 void
1167 tsetscroll(int t, int b) {
1168 int temp;
1169
1170 LIMIT(t, 0, term.row-1);
1171 LIMIT(b, 0, term.row-1);
1172 if(t > b) {
1173 temp = t;
1174 t = b;
1175 b = temp;
1176 }
1177 term.top = t;
1178 term.bot = b;
1179 }
1180
1181 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1182
1183 void
1184 tsetmode(bool priv, bool set, int *args, int narg) {
1185 int *lim, mode;
1186
1187 for (lim = args + narg; args < lim; ++args) {
1188 if(priv) {
1189 switch(*args) {
1190 case 1:
1191 MODBIT(term.mode, set, MODE_APPKEYPAD);
1192 break;
1193 case 5: /* DECSCNM -- Reverve video */
1194 mode = term.mode;
1195 MODBIT(term.mode,set, MODE_REVERSE);
1196 if (mode != term.mode)
1197 draw();
1198 break;
1199 case 7:
1200 MODBIT(term.mode, set, MODE_WRAP);
1201 break;
1202 case 20:
1203 MODBIT(term.mode, set, MODE_CRLF);
1204 break;
1205 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1206 break;
1207 case 25:
1208 MODBIT(term.c.state, !set, CURSOR_HIDE);
1209 break;
1210 case 1000: /* 1000,1002: enable xterm mouse report */
1211 MODBIT(term.mode, set, MODE_MOUSEBTN);
1212 break;
1213 case 1002:
1214 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1215 break;
1216 case 1049: /* = 1047 and 1048 */
1217 case 47:
1218 case 1047:
1219 if(IS_SET(MODE_ALTSCREEN))
1220 tclearregion(0, 0, term.col-1, term.row-1);
1221 if ((set && !IS_SET(MODE_ALTSCREEN)) ||
1222 (!set && IS_SET(MODE_ALTSCREEN))) {
1223 tswapscreen();
1224 }
1225 if (*args != 1049)
1226 break;
1227 /* pass through */
1228 case 1048:
1229 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1230 break;
1231 default:
1232 fprintf(stderr,
1233 "erresc: unknown private set/reset mode %d\n",
1234 *args);
1235 break;
1236 }
1237 } else {
1238 switch(*args) {
1239 case 4:
1240 MODBIT(term.mode, set, MODE_INSERT);
1241 break;
1242 default:
1243 fprintf(stderr,
1244 "erresc: unknown set/reset mode %d\n",
1245 *args);
1246 break;
1247 }
1248 }
1249 }
1250 }
1251 #undef MODBIT
1252
1253
1254 void
1255 csihandle(void) {
1256 switch(csiescseq.mode) {
1257 default:
1258 unknown:
1259 fprintf(stderr, "erresc: unknown csi ");
1260 csidump();
1261 /* die(""); */
1262 break;
1263 case '@': /* ICH -- Insert <n> blank char */
1264 DEFAULT(csiescseq.arg[0], 1);
1265 tinsertblank(csiescseq.arg[0]);
1266 break;
1267 case 'A': /* CUU -- Cursor <n> Up */
1268 case 'e':
1269 DEFAULT(csiescseq.arg[0], 1);
1270 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1271 break;
1272 case 'B': /* CUD -- Cursor <n> Down */
1273 DEFAULT(csiescseq.arg[0], 1);
1274 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1275 break;
1276 case 'C': /* CUF -- Cursor <n> Forward */
1277 case 'a':
1278 DEFAULT(csiescseq.arg[0], 1);
1279 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1280 break;
1281 case 'D': /* CUB -- Cursor <n> Backward */
1282 DEFAULT(csiescseq.arg[0], 1);
1283 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1284 break;
1285 case 'E': /* CNL -- Cursor <n> Down and first col */
1286 DEFAULT(csiescseq.arg[0], 1);
1287 tmoveto(0, term.c.y+csiescseq.arg[0]);
1288 break;
1289 case 'F': /* CPL -- Cursor <n> Up and first col */
1290 DEFAULT(csiescseq.arg[0], 1);
1291 tmoveto(0, term.c.y-csiescseq.arg[0]);
1292 break;
1293 case 'g': /* TBC -- Tabulation clear */
1294 switch (csiescseq.arg[0]) {
1295 case 0: /* clear current tab stop */
1296 term.tabs[term.c.x] = 0;
1297 break;
1298 case 3: /* clear all the tabs */
1299 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1300 break;
1301 default:
1302 goto unknown;
1303 }
1304 break;
1305 case 'G': /* CHA -- Move to <col> */
1306 case '`': /* XXX: HPA -- same? */
1307 DEFAULT(csiescseq.arg[0], 1);
1308 tmoveto(csiescseq.arg[0]-1, term.c.y);
1309 break;
1310 case 'H': /* CUP -- Move to <row> <col> */
1311 case 'f': /* XXX: HVP -- same? */
1312 DEFAULT(csiescseq.arg[0], 1);
1313 DEFAULT(csiescseq.arg[1], 1);
1314 tmoveto(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1315 break;
1316 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1317 DEFAULT(csiescseq.arg[0], 1);
1318 while (csiescseq.arg[0]--)
1319 tputtab(1);
1320 break;
1321 case 'J': /* ED -- Clear screen */
1322 sel.bx = -1;
1323 switch(csiescseq.arg[0]) {
1324 case 0: /* below */
1325 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1326 if(term.c.y < term.row-1)
1327 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1328 break;
1329 case 1: /* above */
1330 if(term.c.y > 1)
1331 tclearregion(0, 0, term.col-1, term.c.y-1);
1332 tclearregion(0, term.c.y, term.c.x, term.c.y);
1333 break;
1334 case 2: /* all */
1335 tclearregion(0, 0, term.col-1, term.row-1);
1336 break;
1337 default:
1338 goto unknown;
1339 }
1340 break;
1341 case 'K': /* EL -- Clear line */
1342 switch(csiescseq.arg[0]) {
1343 case 0: /* right */
1344 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1345 break;
1346 case 1: /* left */
1347 tclearregion(0, term.c.y, term.c.x, term.c.y);
1348 break;
1349 case 2: /* all */
1350 tclearregion(0, term.c.y, term.col-1, term.c.y);
1351 break;
1352 }
1353 break;
1354 case 'S': /* SU -- Scroll <n> line up */
1355 DEFAULT(csiescseq.arg[0], 1);
1356 tscrollup(term.top, csiescseq.arg[0]);
1357 break;
1358 case 'T': /* SD -- Scroll <n> line down */
1359 DEFAULT(csiescseq.arg[0], 1);
1360 tscrolldown(term.top, csiescseq.arg[0]);
1361 break;
1362 case 'L': /* IL -- Insert <n> blank lines */
1363 DEFAULT(csiescseq.arg[0], 1);
1364 tinsertblankline(csiescseq.arg[0]);
1365 break;
1366 case 'l': /* RM -- Reset Mode */
1367 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1368 break;
1369 case 'M': /* DL -- Delete <n> lines */
1370 DEFAULT(csiescseq.arg[0], 1);
1371 tdeleteline(csiescseq.arg[0]);
1372 break;
1373 case 'X': /* ECH -- Erase <n> char */
1374 DEFAULT(csiescseq.arg[0], 1);
1375 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
1376 break;
1377 case 'P': /* DCH -- Delete <n> char */
1378 DEFAULT(csiescseq.arg[0], 1);
1379 tdeletechar(csiescseq.arg[0]);
1380 break;
1381 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1382 DEFAULT(csiescseq.arg[0], 1);
1383 while (csiescseq.arg[0]--)
1384 tputtab(0);
1385 break;
1386 case 'd': /* VPA -- Move to <row> */
1387 DEFAULT(csiescseq.arg[0], 1);
1388 tmoveto(term.c.x, csiescseq.arg[0]-1);
1389 break;
1390 case 'h': /* SM -- Set terminal mode */
1391 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1392 break;
1393 case 'm': /* SGR -- Terminal attribute (color) */
1394 tsetattr(csiescseq.arg, csiescseq.narg);
1395 break;
1396 case 'r': /* DECSTBM -- Set Scrolling Region */
1397 if(csiescseq.priv)
1398 goto unknown;
1399 else {
1400 DEFAULT(csiescseq.arg[0], 1);
1401 DEFAULT(csiescseq.arg[1], term.row);
1402 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1403 tmoveto(0, 0);
1404 }
1405 break;
1406 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1407 tcursor(CURSOR_SAVE);
1408 break;
1409 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1410 tcursor(CURSOR_LOAD);
1411 break;
1412 }
1413 }
1414
1415 void
1416 csidump(void) {
1417 int i;
1418 printf("ESC[");
1419 for(i = 0; i < csiescseq.len; i++) {
1420 uint c = csiescseq.buf[i] & 0xff;
1421 if(isprint(c)) putchar(c);
1422 else if(c == '\n') printf("(\\n)");
1423 else if(c == '\r') printf("(\\r)");
1424 else if(c == 0x1b) printf("(\\e)");
1425 else printf("(%02x)", c);
1426 }
1427 putchar('\n');
1428 }
1429
1430 void
1431 csireset(void) {
1432 memset(&csiescseq, 0, sizeof(csiescseq));
1433 }
1434
1435 void
1436 strhandle(void) {
1437 char *p;
1438
1439 /*
1440 * TODO: make this being useful in case of color palette change.
1441 */
1442 strparse();
1443
1444 p = strescseq.buf;
1445
1446 switch(strescseq.type) {
1447 case ']': /* OSC -- Operating System Command */
1448 switch(p[0]) {
1449 case '0':
1450 case '1':
1451 case '2':
1452 /*
1453 * TODO: Handle special chars in string, like umlauts.
1454 */
1455 if(p[1] == ';') {
1456 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1457 }
1458 break;
1459 case ';':
1460 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1461 break;
1462 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1463 break;
1464 default:
1465 fprintf(stderr, "erresc: unknown str ");
1466 strdump();
1467 break;
1468 }
1469 break;
1470 case 'P': /* DSC -- Device Control String */
1471 case '_': /* APC -- Application Program Command */
1472 case '^': /* PM -- Privacy Message */
1473 default:
1474 fprintf(stderr, "erresc: unknown str ");
1475 strdump();
1476 /* die(""); */
1477 break;
1478 }
1479 }
1480
1481 void
1482 strparse(void) {
1483 /*
1484 * TODO: Implement parsing like for CSI when required.
1485 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1486 */
1487 return;
1488 }
1489
1490 void
1491 strdump(void) {
1492 int i;
1493 printf("ESC%c", strescseq.type);
1494 for(i = 0; i < strescseq.len; i++) {
1495 uint c = strescseq.buf[i] & 0xff;
1496 if(isprint(c)) putchar(c);
1497 else if(c == '\n') printf("(\\n)");
1498 else if(c == '\r') printf("(\\r)");
1499 else if(c == 0x1b) printf("(\\e)");
1500 else printf("(%02x)", c);
1501 }
1502 printf("ESC\\\n");
1503 }
1504
1505 void
1506 strreset(void) {
1507 memset(&strescseq, 0, sizeof(strescseq));
1508 }
1509
1510 void
1511 tputtab(bool forward) {
1512 unsigned x = term.c.x;
1513
1514 if (forward) {
1515 if (x == term.col)
1516 return;
1517 for (++x; x < term.col && !term.tabs[x]; ++x)
1518 /* nothing */ ;
1519 } else {
1520 if (x == 0)
1521 return;
1522 for (--x; x > 0 && !term.tabs[x]; --x)
1523 /* nothing */ ;
1524 }
1525 tmoveto(x, term.c.y);
1526 }
1527
1528 void
1529 tputc(char *c) {
1530 char ascii = *c;
1531 if(term.esc & ESC_START) {
1532 if(term.esc & ESC_CSI) {
1533 csiescseq.buf[csiescseq.len++] = ascii;
1534 if(BETWEEN(ascii, 0x40, 0x7E) || csiescseq.len >= ESC_BUF_SIZ) {
1535 term.esc = 0;
1536 csiparse(), csihandle();
1537 }
1538 } else if(term.esc & ESC_STR) {
1539 switch(ascii) {
1540 case '\033':
1541 term.esc = ESC_START | ESC_STR_END;
1542 break;
1543 case '\a': /* backwards compatibility to xterm */
1544 term.esc = 0;
1545 strhandle();
1546 break;
1547 default:
1548 strescseq.buf[strescseq.len++] = ascii;
1549 if (strescseq.len+1 >= STR_BUF_SIZ) {
1550 term.esc = 0;
1551 strhandle();
1552 }
1553 }
1554 } else if(term.esc & ESC_STR_END) {
1555 term.esc = 0;
1556 if(ascii == '\\')
1557 strhandle();
1558 } else if(term.esc & ESC_ALTCHARSET) {
1559 switch(ascii) {
1560 case '0': /* Line drawing crap */
1561 term.c.attr.mode |= ATTR_GFX;
1562 break;
1563 case 'B': /* Back to regular text */
1564 term.c.attr.mode &= ~ATTR_GFX;
1565 break;
1566 default:
1567 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1568 }
1569 term.esc = 0;
1570 } else {
1571 switch(ascii) {
1572 case '[':
1573 term.esc |= ESC_CSI;
1574 break;
1575 case 'P': /* DCS -- Device Control String */
1576 case '_': /* APC -- Application Program Command */
1577 case '^': /* PM -- Privacy Message */
1578 case ']': /* OSC -- Operating System Command */
1579 strreset();
1580 strescseq.type = ascii;
1581 term.esc |= ESC_STR;
1582 break;
1583 case '(':
1584 term.esc |= ESC_ALTCHARSET;
1585 break;
1586 case 'D': /* IND -- Linefeed */
1587 if(term.c.y == term.bot)
1588 tscrollup(term.top, 1);
1589 else
1590 tmoveto(term.c.x, term.c.y+1);
1591 term.esc = 0;
1592 break;
1593 case 'E': /* NEL -- Next line */
1594 tnewline(1); /* always go to first col */
1595 term.esc = 0;
1596 break;
1597 case 'H': /* HTS -- Horizontal tab stop */
1598 term.tabs[term.c.x] = 1;
1599 term.esc = 0;
1600 break;
1601 case 'M': /* RI -- Reverse index */
1602 if(term.c.y == term.top)
1603 tscrolldown(term.top, 1);
1604 else
1605 tmoveto(term.c.x, term.c.y-1);
1606 term.esc = 0;
1607 break;
1608 case 'c': /* RIS -- Reset to inital state */
1609 treset();
1610 term.esc = 0;
1611 break;
1612 case '=': /* DECPAM -- Application keypad */
1613 term.mode |= MODE_APPKEYPAD;
1614 term.esc = 0;
1615 break;
1616 case '>': /* DECPNM -- Normal keypad */
1617 term.mode &= ~MODE_APPKEYPAD;
1618 term.esc = 0;
1619 break;
1620 case '7': /* DECSC -- Save Cursor */
1621 tcursor(CURSOR_SAVE);
1622 term.esc = 0;
1623 break;
1624 case '8': /* DECRC -- Restore Cursor */
1625 tcursor(CURSOR_LOAD);
1626 term.esc = 0;
1627 break;
1628 case '\\': /* ST -- Stop */
1629 term.esc = 0;
1630 break;
1631 default:
1632 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
1633 (uchar) ascii, isprint(ascii)?ascii:'.');
1634 term.esc = 0;
1635 }
1636 }
1637 } else {
1638 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
1639 sel.bx = -1;
1640 switch(ascii) {
1641 case '\t':
1642 tputtab(1);
1643 break;
1644 case '\b':
1645 tmoveto(term.c.x-1, term.c.y);
1646 break;
1647 case '\r':
1648 tmoveto(0, term.c.y);
1649 break;
1650 case '\f':
1651 case '\v':
1652 case '\n':
1653 /* go to first col if the mode is set */
1654 tnewline(IS_SET(MODE_CRLF));
1655 break;
1656 case '\a':
1657 if(!(xw.state & WIN_FOCUSED))
1658 xseturgency(1);
1659 break;
1660 case '\033':
1661 csireset();
1662 term.esc = ESC_START;
1663 break;
1664 default:
1665 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1666 tnewline(1); /* always go to first col */
1667 tsetchar(c);
1668 if(term.c.x+1 < term.col)
1669 tmoveto(term.c.x+1, term.c.y);
1670 else
1671 term.c.state |= CURSOR_WRAPNEXT;
1672 }
1673 }
1674 }
1675
1676 int
1677 tresize(int col, int row) {
1678 int i, x;
1679 int minrow = MIN(row, term.row);
1680 int mincol = MIN(col, term.col);
1681 int slide = term.c.y - row + 1;
1682
1683 if(col < 1 || row < 1)
1684 return 0;
1685
1686 /* free unneeded rows */
1687 i = 0;
1688 if(slide > 0) {
1689 /* slide screen to keep cursor where we expect it -
1690 * tscrollup would work here, but we can optimize to
1691 * memmove because we're freeing the earlier lines */
1692 for(/* i = 0 */; i < slide; i++) {
1693 free(term.line[i]);
1694 free(term.alt[i]);
1695 }
1696 memmove(term.line, term.line + slide, row * sizeof(Line));
1697 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1698 }
1699 for(i += row; i < term.row; i++) {
1700 free(term.line[i]);
1701 free(term.alt[i]);
1702 }
1703
1704 /* resize to new height */
1705 term.line = realloc(term.line, row * sizeof(Line));
1706 term.alt = realloc(term.alt, row * sizeof(Line));
1707 term.dirty = realloc(term.dirty, row * sizeof(*term.dirty));
1708 term.tabs = realloc(term.tabs, col * sizeof(*term.tabs));
1709
1710 /* resize each row to new width, zero-pad if needed */
1711 for(i = 0; i < minrow; i++) {
1712 term.dirty[i] = 1;
1713 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
1714 term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
1715 for(x = mincol; x < col; x++) {
1716 term.line[i][x].state = 0;
1717 term.alt[i][x].state = 0;
1718 }
1719 }
1720
1721 /* allocate any new rows */
1722 for(/* i == minrow */; i < row; i++) {
1723 term.dirty[i] = 1;
1724 term.line[i] = calloc(col, sizeof(Glyph));
1725 term.alt [i] = calloc(col, sizeof(Glyph));
1726 }
1727 if (col > term.col) {
1728 bool *bp = term.tabs + term.col;
1729
1730 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
1731 while (--bp > term.tabs && !*bp)
1732 /* nothing */ ;
1733 for (bp += TAB; bp < term.tabs + col; bp += TAB)
1734 *bp = 1;
1735 }
1736 /* update terminal size */
1737 term.col = col, term.row = row;
1738 /* make use of the LIMIT in tmoveto */
1739 tmoveto(term.c.x, term.c.y);
1740 /* reset scrolling region */
1741 tsetscroll(0, row-1);
1742
1743 return (slide > 0);
1744 }
1745
1746 void
1747 xresize(int col, int row) {
1748 xw.w = MAX(1, 2*BORDER + col * xw.cw);
1749 xw.h = MAX(1, 2*BORDER + row * xw.ch);
1750 }
1751
1752 void
1753 xloadcols(void) {
1754 int i, r, g, b;
1755 XColor color;
1756 ulong white = WhitePixel(xw.dpy, xw.scr);
1757
1758 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
1759 for(i = 0; i < LEN(colorname); i++) {
1760 if(!colorname[i])
1761 continue;
1762 if(!XAllocNamedColor(xw.dpy, xw.cmap, colorname[i], &color, &color)) {
1763 dc.col[i] = white;
1764 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1765 } else
1766 dc.col[i] = color.pixel;
1767 }
1768
1769 /* load colors [16-255] ; same colors as xterm */
1770 for(i = 16, r = 0; r < 6; r++)
1771 for(g = 0; g < 6; g++)
1772 for(b = 0; b < 6; b++) {
1773 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1774 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1775 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1776 if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
1777 dc.col[i] = white;
1778 fprintf(stderr, "Could not allocate color %d\n", i);
1779 } else
1780 dc.col[i] = color.pixel;
1781 i++;
1782 }
1783
1784 for(r = 0; r < 24; r++, i++) {
1785 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1786 if (!XAllocColor(xw.dpy, xw.cmap, &color)) {
1787 dc.col[i] = white;
1788 fprintf(stderr, "Could not allocate color %d\n", i);
1789 } else
1790 dc.col[i] = color.pixel;
1791 }
1792 }
1793
1794 void
1795 xclear(int x1, int y1, int x2, int y2) {
1796 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
1797 XFillRectangle(xw.dpy, xw.buf, dc.gc,
1798 BORDER + x1 * xw.cw, BORDER + y1 * xw.ch,
1799 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1800 }
1801
1802 void
1803 xhints(void) {
1804 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
1805 XWMHints wm = {.flags = InputHint, .input = 1};
1806 XSizeHints size = {
1807 .flags = PSize | PResizeInc | PBaseSize,
1808 .height = xw.h,
1809 .width = xw.w,
1810 .height_inc = xw.ch,
1811 .width_inc = xw.cw,
1812 .base_height = 2*BORDER,
1813 .base_width = 2*BORDER,
1814 };
1815 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1816 }
1817
1818 XFontSet
1819 xinitfont(char *fontstr) {
1820 XFontSet set;
1821 char *def, **missing;
1822 int n;
1823
1824 missing = NULL;
1825 set = XCreateFontSet(xw.dpy, fontstr, &missing, &n, &def);
1826 if(missing) {
1827 while(n--)
1828 fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
1829 XFreeStringList(missing);
1830 }
1831 return set;
1832 }
1833
1834 void
1835 xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing) {
1836 XFontStruct **xfonts;
1837 char **font_names;
1838 int i, n;
1839
1840 *ascent = *descent = *lbearing = *rbearing = 0;
1841 n = XFontsOfFontSet(set, &xfonts, &font_names);
1842 for(i = 0; i < n; i++) {
1843 *ascent = MAX(*ascent, (*xfonts)->ascent);
1844 *descent = MAX(*descent, (*xfonts)->descent);
1845 *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
1846 *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
1847 xfonts++;
1848 }
1849 }
1850
1851 void
1852 initfonts(char *fontstr, char *bfontstr) {
1853 if((dc.font.set = xinitfont(fontstr)) == NULL ||
1854 (dc.bfont.set = xinitfont(bfontstr)) == NULL)
1855 die("Can't load font %s\n", dc.font.set ? BOLDFONT : FONT);
1856 xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
1857 &dc.font.lbearing, &dc.font.rbearing);
1858 xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
1859 &dc.bfont.lbearing, &dc.bfont.rbearing);
1860 }
1861
1862 void
1863 xinit(void) {
1864 XSetWindowAttributes attrs;
1865 Cursor cursor;
1866 Window parent;
1867
1868 if(!(xw.dpy = XOpenDisplay(NULL)))
1869 die("Can't open display\n");
1870 xw.scr = XDefaultScreen(xw.dpy);
1871
1872 /* font */
1873 initfonts(FONT, BOLDFONT);
1874
1875 /* XXX: Assuming same size for bold font */
1876 xw.cw = dc.font.rbearing - dc.font.lbearing;
1877 xw.ch = dc.font.ascent + dc.font.descent;
1878
1879 /* colors */
1880 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1881 xloadcols();
1882
1883 /* window - default size */
1884 xw.h = 2*BORDER + term.row * xw.ch;
1885 xw.w = 2*BORDER + term.col * xw.cw;
1886
1887 attrs.background_pixel = dc.col[DefaultBG];
1888 attrs.border_pixel = dc.col[DefaultBG];
1889 attrs.bit_gravity = NorthWestGravity;
1890 attrs.event_mask = FocusChangeMask | KeyPressMask
1891 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1892 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask
1893 | EnterWindowMask | LeaveWindowMask;
1894 attrs.colormap = xw.cmap;
1895
1896 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
1897 xw.win = XCreateWindow(xw.dpy, parent, 0, 0,
1898 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
1899 XDefaultVisual(xw.dpy, xw.scr),
1900 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
1901 | CWColormap,
1902 &attrs);
1903 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
1904
1905
1906 /* input methods */
1907 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
1908 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
1909 | XIMStatusNothing, XNClientWindow, xw.win,
1910 XNFocusWindow, xw.win, NULL);
1911 /* gc */
1912 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
1913
1914 /* white cursor, black outline */
1915 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
1916 XDefineCursor(xw.dpy, xw.win, cursor);
1917 XRecolorCursor(xw.dpy, cursor,
1918 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
1919 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
1920
1921 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
1922
1923 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
1924 XMapWindow(xw.dpy, xw.win);
1925 xhints();
1926 XSync(xw.dpy, 0);
1927 }
1928
1929 void
1930 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
1931 int fg = base.fg, bg = base.bg, temp;
1932 int winx = BORDER+x*xw.cw, winy = BORDER+y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
1933 XFontSet fontset = dc.font.set;
1934 int i;
1935
1936 /* only switch default fg/bg if term is in RV mode */
1937 if(IS_SET(MODE_REVERSE)) {
1938 if(fg == DefaultFG)
1939 fg = DefaultBG;
1940 if(bg == DefaultBG)
1941 bg = DefaultFG;
1942 }
1943
1944 if(base.mode & ATTR_REVERSE)
1945 temp = fg, fg = bg, bg = temp;
1946
1947 if(base.mode & ATTR_BOLD) {
1948 fg += 8;
1949 fontset = dc.bfont.set;
1950 }
1951
1952 XSetBackground(xw.dpy, dc.gc, dc.col[bg]);
1953 XSetForeground(xw.dpy, dc.gc, dc.col[fg]);
1954
1955 if(base.mode & ATTR_GFX) {
1956 for(i = 0; i < bytelen; i++) {
1957 char c = gfx[(uint)s[i] % 256];
1958 if(c)
1959 s[i] = c;
1960 else if(s[i] > 0x5f)
1961 s[i] -= 0x5f;
1962 }
1963 }
1964
1965 XmbDrawImageString(xw.dpy, xw.buf, fontset, dc.gc, winx, winy, s, bytelen);
1966
1967 if(base.mode & ATTR_UNDERLINE)
1968 XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1969 }
1970
1971 /* copy buffer pixmap to screen pixmap */
1972 void
1973 xcopy() {
1974 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
1975 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
1976
1977 }
1978
1979 void
1980 xdrawcursor(void) {
1981 static int oldx = 0;
1982 static int oldy = 0;
1983 int sl;
1984 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
1985
1986 LIMIT(oldx, 0, term.col-1);
1987 LIMIT(oldy, 0, term.row-1);
1988
1989 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
1990 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
1991
1992 /* remove the old cursor */
1993 if(term.line[oldy][oldx].state & GLYPH_SET) {
1994 sl = utf8size(term.line[oldy][oldx].c);
1995 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
1996 } else
1997 xclear(oldx, oldy, oldx, oldy);
1998
1999 xcopy(oldx, oldy, 1, 1);
2000
2001 /* draw the new one */
2002 if(!(term.c.state & CURSOR_HIDE)) {
2003 if(!(xw.state & WIN_FOCUSED))
2004 g.bg = DefaultUCS;
2005
2006 if(IS_SET(MODE_REVERSE))
2007 g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
2008
2009 sl = utf8size(g.c);
2010 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2011 oldx = term.c.x, oldy = term.c.y;
2012 }
2013
2014 xcopy(term.c.x, term.c.y, 1, 1);
2015 }
2016
2017 void
2018 draw() {
2019 drawregion(0, 0, term.col, term.row);
2020 xcopy();
2021 gettimeofday(&xw.lastdraw, NULL);
2022 }
2023
2024 void
2025 drawregion(int x1, int y1, int x2, int y2) {
2026 int ic, ib, x, y, ox, sl;
2027 Glyph base, new;
2028 char buf[DRAW_BUF_SIZ];
2029
2030 if(!(xw.state & WIN_VISIBLE))
2031 return;
2032
2033 for(y = y1; y < y2; y++) {
2034 if(!term.dirty[y])
2035 continue;
2036 xclear(0, y, term.col, y);
2037 term.dirty[y] = 0;
2038 base = term.line[y][0];
2039 ic = ib = ox = 0;
2040 for(x = x1; x < x2; x++) {
2041 new = term.line[y][x];
2042 if(sel.bx != -1 && *(new.c) && selected(x, y))
2043 new.mode ^= ATTR_REVERSE;
2044 if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
2045 ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2046 xdraws(buf, base, ox, y, ic, ib);
2047 ic = ib = 0;
2048 }
2049 if(new.state & GLYPH_SET) {
2050 if(ib == 0) {
2051 ox = x;
2052 base = new;
2053 }
2054 sl = utf8size(new.c);
2055 memcpy(buf+ib, new.c, sl);
2056 ib += sl;
2057 ++ic;
2058 }
2059 }
2060 if(ib > 0)
2061 xdraws(buf, base, ox, y, ic, ib);
2062 }
2063 xdrawcursor();
2064 }
2065
2066 void
2067 expose(XEvent *ev) {
2068 XExposeEvent *e = &ev->xexpose;
2069 if(xw.state & WIN_REDRAW) {
2070 if(!e->count)
2071 xw.state &= ~WIN_REDRAW;
2072 }
2073 xcopy();
2074 }
2075
2076 void
2077 visibility(XEvent *ev) {
2078 XVisibilityEvent *e = &ev->xvisibility;
2079 if(e->state == VisibilityFullyObscured)
2080 xw.state &= ~WIN_VISIBLE;
2081 else if(!(xw.state & WIN_VISIBLE))
2082 /* need a full redraw for next Expose, not just a buf copy */
2083 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2084 }
2085
2086 void
2087 unmap(XEvent *ev) {
2088 xw.state &= ~WIN_VISIBLE;
2089 }
2090
2091 void
2092 xseturgency(int add) {
2093 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2094 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2095 XSetWMHints(xw.dpy, xw.win, h);
2096 XFree(h);
2097 }
2098
2099 void
2100 focus(XEvent *ev) {
2101 if(ev->type == FocusIn) {
2102 xw.state |= WIN_FOCUSED;
2103 xseturgency(0);
2104 } else
2105 xw.state &= ~WIN_FOCUSED;
2106 draw();
2107 }
2108
2109 char*
2110 kmap(KeySym k, uint state) {
2111 int i;
2112 state &= ~Mod2Mask;
2113 for(i = 0; i < LEN(key); i++) {
2114 uint mask = key[i].mask;
2115 if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
2116 return (char*)key[i].s;
2117 }
2118 return NULL;
2119 }
2120
2121 void
2122 kpress(XEvent *ev) {
2123 XKeyEvent *e = &ev->xkey;
2124 KeySym ksym;
2125 char buf[32];
2126 char *customkey;
2127 int len;
2128 int meta;
2129 int shift;
2130 Status status;
2131
2132 meta = e->state & Mod1Mask;
2133 shift = e->state & ShiftMask;
2134 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
2135
2136 /* 1. custom keys from config.h */
2137 if((customkey = kmap(ksym, e->state)))
2138 ttywrite(customkey, strlen(customkey));
2139 /* 2. hardcoded (overrides X lookup) */
2140 else
2141 switch(ksym) {
2142 case XK_Up:
2143 case XK_Down:
2144 case XK_Left:
2145 case XK_Right:
2146 /* XXX: shift up/down doesn't work */
2147 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
2148 ttywrite(buf, 3);
2149 break;
2150 case XK_Insert:
2151 if(shift)
2152 selpaste();
2153 break;
2154 case XK_Return:
2155 if(IS_SET(MODE_CRLF))
2156 ttywrite("\r\n", 2);
2157 else
2158 ttywrite("\r", 1);
2159 break;
2160 /* 3. X lookup */
2161 default:
2162 if(len > 0) {
2163 if(meta && len == 1)
2164 ttywrite("\033", 1);
2165 ttywrite(buf, len);
2166 }
2167 break;
2168 }
2169 }
2170
2171 void
2172 cmessage(XEvent *e) {
2173 /* See xembed specs
2174 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2175 if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2176 if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2177 xw.state |= WIN_FOCUSED;
2178 xseturgency(0);
2179 } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2180 xw.state &= ~WIN_FOCUSED;
2181 }
2182 draw();
2183 }
2184 }
2185
2186 void
2187 resize(XEvent *e) {
2188 int col, row;
2189
2190 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2191 return;
2192
2193 xw.w = e->xconfigure.width;
2194 xw.h = e->xconfigure.height;
2195 col = (xw.w - 2*BORDER) / xw.cw;
2196 row = (xw.h - 2*BORDER) / xw.ch;
2197 if(col == term.col && row == term.row)
2198 return;
2199 if(tresize(col, row))
2200 draw();
2201 ttyresize(col, row);
2202 xresize(col, row);
2203 }
2204
2205 bool
2206 last_draw_too_old(void) {
2207 struct timeval now;
2208 gettimeofday(&now, NULL);
2209 return TIMEDIFF(now, xw.lastdraw) >= DRAW_TIMEOUT/1000;
2210 }
2211
2212 void
2213 run(void) {
2214 XEvent ev;
2215 fd_set rfd;
2216 int xfd = XConnectionNumber(xw.dpy);
2217 struct timeval timeout = {0};
2218 bool stuff_to_print = 0;
2219
2220 for(;;) {
2221 FD_ZERO(&rfd);
2222 FD_SET(cmdfd, &rfd);
2223 FD_SET(xfd, &rfd);
2224 timeout.tv_sec = 0;
2225 timeout.tv_usec = SELECT_TIMEOUT;
2226 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, &timeout) < 0) {
2227 if(errno == EINTR)
2228 continue;
2229 die("select failed: %s\n", SERRNO);
2230 }
2231 if(FD_ISSET(cmdfd, &rfd)) {
2232 ttyread();
2233 stuff_to_print = 1;
2234 }
2235
2236 if(stuff_to_print && last_draw_too_old()) {
2237 stuff_to_print = 0;
2238 draw();
2239 }
2240
2241 while(XPending(xw.dpy)) {
2242 XNextEvent(xw.dpy, &ev);
2243 if(XFilterEvent(&ev, xw.win))
2244 continue;
2245 if(handler[ev.type])
2246 (handler[ev.type])(&ev);
2247 }
2248 }
2249 }
2250
2251 int
2252 main(int argc, char *argv[]) {
2253 int i;
2254
2255 for(i = 1; i < argc; i++) {
2256 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2257 case 't':
2258 if(++i < argc) opt_title = argv[i];
2259 break;
2260 case 'c':
2261 if(++i < argc) opt_class = argv[i];
2262 break;
2263 case 'w':
2264 if(++i < argc) opt_embed = argv[i];
2265 break;
2266 case 'e':
2267 /* eat every remaining arguments */
2268 if(++i < argc) opt_cmd = &argv[i];
2269 goto run;
2270 case 'v':
2271 default:
2272 die(USAGE);
2273 }
2274 }
2275
2276 run:
2277 setlocale(LC_CTYPE, "");
2278 tnew(80, 24);
2279 ttynew();
2280 xinit();
2281 selinit();
2282 run();
2283 return 0;
2284 }