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f3f7f28a10f2fcf34b9a6b374e682ac4195838c0
[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: 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: 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: gfx attr %d unknown\n", attr[i]), csidump();
1161
1162 break;
1163 }
1164 }
1165 }
1166
1167 void
1168 tsetscroll(int t, int b) {
1169 int temp;
1170
1171 LIMIT(t, 0, term.row-1);
1172 LIMIT(b, 0, term.row-1);
1173 if(t > b) {
1174 temp = t;
1175 t = b;
1176 b = temp;
1177 }
1178 term.top = t;
1179 term.bot = b;
1180 }
1181
1182 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1183
1184 void
1185 tsetmode(bool priv, bool set, int *args, int narg) {
1186 int *lim, mode;
1187
1188 for (lim = args + narg; args < lim; ++args) {
1189 if(priv) {
1190 switch(*args) {
1191 case 1:
1192 MODBIT(term.mode, set, MODE_APPKEYPAD);
1193 break;
1194 case 5: /* DECSCNM -- Reverve video */
1195 mode = term.mode;
1196 MODBIT(term.mode,set, MODE_REVERSE);
1197 if (mode != term.mode)
1198 draw();
1199 break;
1200 case 7:
1201 MODBIT(term.mode, set, MODE_WRAP);
1202 break;
1203 case 20:
1204 MODBIT(term.mode, set, MODE_CRLF);
1205 break;
1206 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1207 break;
1208 case 25:
1209 MODBIT(term.c.state, !set, CURSOR_HIDE);
1210 break;
1211 case 1000: /* 1000,1002: enable xterm mouse report */
1212 MODBIT(term.mode, set, MODE_MOUSEBTN);
1213 break;
1214 case 1002:
1215 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1216 break;
1217 case 1049: /* = 1047 and 1048 */
1218 case 47:
1219 case 1047:
1220 if(IS_SET(MODE_ALTSCREEN))
1221 tclearregion(0, 0, term.col-1, term.row-1);
1222 if ((set && !IS_SET(MODE_ALTSCREEN)) ||
1223 (!set && IS_SET(MODE_ALTSCREEN))) {
1224 tswapscreen();
1225 }
1226 if (*args != 1049)
1227 break;
1228 /* pass through */
1229 case 1048:
1230 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1231 break;
1232 default:
1233 fprintf(stderr,
1234 "erresc: unknown private set/reset mode %d\n",
1235 *args);
1236 break;
1237 }
1238 } else {
1239 switch(*args) {
1240 case 4:
1241 MODBIT(term.mode, set, MODE_INSERT);
1242 break;
1243 default:
1244 fprintf(stderr,
1245 "erresc: unknown set/reset mode %d\n",
1246 *args);
1247 break;
1248 }
1249 }
1250 }
1251 }
1252 #undef MODBIT
1253
1254
1255 void
1256 csihandle(void) {
1257 switch(csiescseq.mode) {
1258 default:
1259 unknown:
1260 fprintf(stderr, "erresc: unknown csi ");
1261 csidump();
1262 /* die(""); */
1263 break;
1264 case '@': /* ICH -- Insert <n> blank char */
1265 DEFAULT(csiescseq.arg[0], 1);
1266 tinsertblank(csiescseq.arg[0]);
1267 break;
1268 case 'A': /* CUU -- Cursor <n> Up */
1269 case 'e':
1270 DEFAULT(csiescseq.arg[0], 1);
1271 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1272 break;
1273 case 'B': /* CUD -- Cursor <n> Down */
1274 DEFAULT(csiescseq.arg[0], 1);
1275 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1276 break;
1277 case 'C': /* CUF -- Cursor <n> Forward */
1278 case 'a':
1279 DEFAULT(csiescseq.arg[0], 1);
1280 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1281 break;
1282 case 'D': /* CUB -- Cursor <n> Backward */
1283 DEFAULT(csiescseq.arg[0], 1);
1284 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1285 break;
1286 case 'E': /* CNL -- Cursor <n> Down and first col */
1287 DEFAULT(csiescseq.arg[0], 1);
1288 tmoveto(0, term.c.y+csiescseq.arg[0]);
1289 break;
1290 case 'F': /* CPL -- Cursor <n> Up and first col */
1291 DEFAULT(csiescseq.arg[0], 1);
1292 tmoveto(0, term.c.y-csiescseq.arg[0]);
1293 break;
1294 case 'g': /* TBC -- Tabulation clear */
1295 switch (csiescseq.arg[0]) {
1296 case 0: /* clear current tab stop */
1297 term.tabs[term.c.x] = 0;
1298 break;
1299 case 3: /* clear all the tabs */
1300 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1301 break;
1302 default:
1303 goto unknown;
1304 }
1305 break;
1306 case 'G': /* CHA -- Move to <col> */
1307 case '`': /* XXX: HPA -- same? */
1308 DEFAULT(csiescseq.arg[0], 1);
1309 tmoveto(csiescseq.arg[0]-1, term.c.y);
1310 break;
1311 case 'H': /* CUP -- Move to <row> <col> */
1312 case 'f': /* XXX: HVP -- same? */
1313 DEFAULT(csiescseq.arg[0], 1);
1314 DEFAULT(csiescseq.arg[1], 1);
1315 tmoveto(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1316 break;
1317 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1318 DEFAULT(csiescseq.arg[0], 1);
1319 while (csiescseq.arg[0]--)
1320 tputtab(1);
1321 break;
1322 case 'J': /* ED -- Clear screen */
1323 sel.bx = -1;
1324 switch(csiescseq.arg[0]) {
1325 case 0: /* below */
1326 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1327 if(term.c.y < term.row-1)
1328 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1329 break;
1330 case 1: /* above */
1331 if(term.c.y > 1)
1332 tclearregion(0, 0, term.col-1, term.c.y-1);
1333 tclearregion(0, term.c.y, term.c.x, term.c.y);
1334 break;
1335 case 2: /* all */
1336 tclearregion(0, 0, term.col-1, term.row-1);
1337 break;
1338 default:
1339 goto unknown;
1340 }
1341 break;
1342 case 'K': /* EL -- Clear line */
1343 switch(csiescseq.arg[0]) {
1344 case 0: /* right */
1345 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1346 break;
1347 case 1: /* left */
1348 tclearregion(0, term.c.y, term.c.x, term.c.y);
1349 break;
1350 case 2: /* all */
1351 tclearregion(0, term.c.y, term.col-1, term.c.y);
1352 break;
1353 }
1354 break;
1355 case 'S': /* SU -- Scroll <n> line up */
1356 DEFAULT(csiescseq.arg[0], 1);
1357 tscrollup(term.top, csiescseq.arg[0]);
1358 break;
1359 case 'T': /* SD -- Scroll <n> line down */
1360 DEFAULT(csiescseq.arg[0], 1);
1361 tscrolldown(term.top, csiescseq.arg[0]);
1362 break;
1363 case 'L': /* IL -- Insert <n> blank lines */
1364 DEFAULT(csiescseq.arg[0], 1);
1365 tinsertblankline(csiescseq.arg[0]);
1366 break;
1367 case 'l': /* RM -- Reset Mode */
1368 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1369 break;
1370 case 'M': /* DL -- Delete <n> lines */
1371 DEFAULT(csiescseq.arg[0], 1);
1372 tdeleteline(csiescseq.arg[0]);
1373 break;
1374 case 'X': /* ECH -- Erase <n> char */
1375 DEFAULT(csiescseq.arg[0], 1);
1376 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
1377 break;
1378 case 'P': /* DCH -- Delete <n> char */
1379 DEFAULT(csiescseq.arg[0], 1);
1380 tdeletechar(csiescseq.arg[0]);
1381 break;
1382 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1383 DEFAULT(csiescseq.arg[0], 1);
1384 while (csiescseq.arg[0]--)
1385 tputtab(0);
1386 break;
1387 case 'd': /* VPA -- Move to <row> */
1388 DEFAULT(csiescseq.arg[0], 1);
1389 tmoveto(term.c.x, csiescseq.arg[0]-1);
1390 break;
1391 case 'h': /* SM -- Set terminal mode */
1392 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1393 break;
1394 case 'm': /* SGR -- Terminal attribute (color) */
1395 tsetattr(csiescseq.arg, csiescseq.narg);
1396 break;
1397 case 'r': /* DECSTBM -- Set Scrolling Region */
1398 if(csiescseq.priv)
1399 goto unknown;
1400 else {
1401 DEFAULT(csiescseq.arg[0], 1);
1402 DEFAULT(csiescseq.arg[1], term.row);
1403 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1404 tmoveto(0, 0);
1405 }
1406 break;
1407 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1408 tcursor(CURSOR_SAVE);
1409 break;
1410 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1411 tcursor(CURSOR_LOAD);
1412 break;
1413 }
1414 }
1415
1416 void
1417 csidump(void) {
1418 int i;
1419 printf("ESC[");
1420 for(i = 0; i < csiescseq.len; i++) {
1421 uint c = csiescseq.buf[i] & 0xff;
1422 if(isprint(c)) putchar(c);
1423 else if(c == '\n') printf("(\\n)");
1424 else if(c == '\r') printf("(\\r)");
1425 else if(c == 0x1b) printf("(\\e)");
1426 else printf("(%02x)", c);
1427 }
1428 putchar('\n');
1429 }
1430
1431 void
1432 csireset(void) {
1433 memset(&csiescseq, 0, sizeof(csiescseq));
1434 }
1435
1436 void
1437 strhandle(void) {
1438 char *p;
1439
1440 /*
1441 * TODO: make this being useful in case of color palette change.
1442 */
1443 strparse();
1444
1445 p = strescseq.buf;
1446
1447 switch(strescseq.type) {
1448 case ']': /* OSC -- Operating System Command */
1449 switch(p[0]) {
1450 case '0':
1451 case '1':
1452 case '2':
1453 /*
1454 * TODO: Handle special chars in string, like umlauts.
1455 */
1456 if(p[1] == ';') {
1457 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1458 }
1459 break;
1460 case ';':
1461 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1462 break;
1463 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1464 break;
1465 default:
1466 fprintf(stderr, "erresc: unknown str ");
1467 strdump();
1468 break;
1469 }
1470 break;
1471 case 'P': /* DSC -- Device Control String */
1472 case '_': /* APC -- Application Program Command */
1473 case '^': /* PM -- Privacy Message */
1474 default:
1475 fprintf(stderr, "erresc: unknown str ");
1476 strdump();
1477 /* die(""); */
1478 break;
1479 }
1480 }
1481
1482 void
1483 strparse(void) {
1484 /*
1485 * TODO: Implement parsing like for CSI when required.
1486 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1487 */
1488 return;
1489 }
1490
1491 void
1492 strdump(void) {
1493 int i;
1494 printf("ESC%c", strescseq.type);
1495 for(i = 0; i < strescseq.len; i++) {
1496 uint c = strescseq.buf[i] & 0xff;
1497 if(isprint(c)) putchar(c);
1498 else if(c == '\n') printf("(\\n)");
1499 else if(c == '\r') printf("(\\r)");
1500 else if(c == 0x1b) printf("(\\e)");
1501 else printf("(%02x)", c);
1502 }
1503 printf("ESC\\\n");
1504 }
1505
1506 void
1507 strreset(void) {
1508 memset(&strescseq, 0, sizeof(strescseq));
1509 }
1510
1511 void
1512 tputtab(bool forward) {
1513 unsigned x = term.c.x;
1514
1515 if (forward) {
1516 if (x == term.col)
1517 return;
1518 for (++x; x < term.col && !term.tabs[x]; ++x)
1519 /* nothing */ ;
1520 } else {
1521 if (x == 0)
1522 return;
1523 for (--x; x > 0 && !term.tabs[x]; --x)
1524 /* nothing */ ;
1525 }
1526 tmoveto(x, term.c.y);
1527 }
1528
1529 void
1530 tputc(char *c) {
1531 char ascii = *c;
1532 if(term.esc & ESC_START) {
1533 if(term.esc & ESC_CSI) {
1534 csiescseq.buf[csiescseq.len++] = ascii;
1535 if(BETWEEN(ascii, 0x40, 0x7E) || csiescseq.len >= ESC_BUF_SIZ) {
1536 term.esc = 0;
1537 csiparse(), csihandle();
1538 }
1539 } else if(term.esc & ESC_STR) {
1540 switch(ascii) {
1541 case '\033':
1542 term.esc = ESC_START | ESC_STR_END;
1543 break;
1544 case '\a': /* backwards compatibility to xterm */
1545 term.esc = 0;
1546 strhandle();
1547 break;
1548 default:
1549 strescseq.buf[strescseq.len++] = ascii;
1550 if (strescseq.len+1 >= STR_BUF_SIZ) {
1551 term.esc = 0;
1552 strhandle();
1553 }
1554 }
1555 } else if(term.esc & ESC_STR_END) {
1556 term.esc = 0;
1557 if(ascii == '\\')
1558 strhandle();
1559 } else if(term.esc & ESC_ALTCHARSET) {
1560 switch(ascii) {
1561 case '0': /* Line drawing crap */
1562 term.c.attr.mode |= ATTR_GFX;
1563 break;
1564 case 'B': /* Back to regular text */
1565 term.c.attr.mode &= ~ATTR_GFX;
1566 break;
1567 default:
1568 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1569 }
1570 term.esc = 0;
1571 } else {
1572 switch(ascii) {
1573 case '[':
1574 term.esc |= ESC_CSI;
1575 break;
1576 case 'P': /* DCS -- Device Control String */
1577 case '_': /* APC -- Application Program Command */
1578 case '^': /* PM -- Privacy Message */
1579 case ']': /* OSC -- Operating System Command */
1580 strreset();
1581 strescseq.type = ascii;
1582 term.esc |= ESC_STR;
1583 break;
1584 case '(':
1585 term.esc |= ESC_ALTCHARSET;
1586 break;
1587 case 'D': /* IND -- Linefeed */
1588 if(term.c.y == term.bot)
1589 tscrollup(term.top, 1);
1590 else
1591 tmoveto(term.c.x, term.c.y+1);
1592 term.esc = 0;
1593 break;
1594 case 'E': /* NEL -- Next line */
1595 tnewline(1); /* always go to first col */
1596 term.esc = 0;
1597 break;
1598 case 'H': /* HTS -- Horizontal tab stop */
1599 term.tabs[term.c.x] = 1;
1600 term.esc = 0;
1601 break;
1602 case 'M': /* RI -- Reverse index */
1603 if(term.c.y == term.top)
1604 tscrolldown(term.top, 1);
1605 else
1606 tmoveto(term.c.x, term.c.y-1);
1607 term.esc = 0;
1608 break;
1609 case 'c': /* RIS -- Reset to inital state */
1610 treset();
1611 term.esc = 0;
1612 break;
1613 case '=': /* DECPAM -- Application keypad */
1614 term.mode |= MODE_APPKEYPAD;
1615 term.esc = 0;
1616 break;
1617 case '>': /* DECPNM -- Normal keypad */
1618 term.mode &= ~MODE_APPKEYPAD;
1619 term.esc = 0;
1620 break;
1621 case '7': /* DECSC -- Save Cursor */
1622 tcursor(CURSOR_SAVE);
1623 term.esc = 0;
1624 break;
1625 case '8': /* DECRC -- Restore Cursor */
1626 tcursor(CURSOR_LOAD);
1627 term.esc = 0;
1628 break;
1629 case '\\': /* ST -- Stop */
1630 term.esc = 0;
1631 break;
1632 default:
1633 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
1634 (uchar) ascii, isprint(ascii)?ascii:'.');
1635 term.esc = 0;
1636 }
1637 }
1638 } else {
1639 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
1640 sel.bx = -1;
1641 switch(ascii) {
1642 case '\t':
1643 tputtab(1);
1644 break;
1645 case '\b':
1646 tmoveto(term.c.x-1, term.c.y);
1647 break;
1648 case '\r':
1649 tmoveto(0, term.c.y);
1650 break;
1651 case '\f':
1652 case '\v':
1653 case '\n':
1654 /* go to first col if the mode is set */
1655 tnewline(IS_SET(MODE_CRLF));
1656 break;
1657 case '\a':
1658 if(!(xw.state & WIN_FOCUSED))
1659 xseturgency(1);
1660 break;
1661 case '\033':
1662 csireset();
1663 term.esc = ESC_START;
1664 break;
1665 default:
1666 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1667 tnewline(1); /* always go to first col */
1668 tsetchar(c);
1669 if(term.c.x+1 < term.col)
1670 tmoveto(term.c.x+1, term.c.y);
1671 else
1672 term.c.state |= CURSOR_WRAPNEXT;
1673 }
1674 }
1675 }
1676
1677 int
1678 tresize(int col, int row) {
1679 int i, x;
1680 int minrow = MIN(row, term.row);
1681 int mincol = MIN(col, term.col);
1682 int slide = term.c.y - row + 1;
1683
1684 if(col < 1 || row < 1)
1685 return 0;
1686
1687 /* free unneeded rows */
1688 i = 0;
1689 if(slide > 0) {
1690 /* slide screen to keep cursor where we expect it -
1691 * tscrollup would work here, but we can optimize to
1692 * memmove because we're freeing the earlier lines */
1693 for(/* i = 0 */; i < slide; i++) {
1694 free(term.line[i]);
1695 free(term.alt[i]);
1696 }
1697 memmove(term.line, term.line + slide, row * sizeof(Line));
1698 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1699 }
1700 for(i += row; i < term.row; i++) {
1701 free(term.line[i]);
1702 free(term.alt[i]);
1703 }
1704
1705 /* resize to new height */
1706 term.line = realloc(term.line, row * sizeof(Line));
1707 term.alt = realloc(term.alt, row * sizeof(Line));
1708 term.dirty = realloc(term.dirty, row * sizeof(*term.dirty));
1709 term.tabs = realloc(term.tabs, col * sizeof(*term.tabs));
1710
1711 /* resize each row to new width, zero-pad if needed */
1712 for(i = 0; i < minrow; i++) {
1713 term.dirty[i] = 1;
1714 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
1715 term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
1716 for(x = mincol; x < col; x++) {
1717 term.line[i][x].state = 0;
1718 term.alt[i][x].state = 0;
1719 }
1720 }
1721
1722 /* allocate any new rows */
1723 for(/* i == minrow */; i < row; i++) {
1724 term.dirty[i] = 1;
1725 term.line[i] = calloc(col, sizeof(Glyph));
1726 term.alt [i] = calloc(col, sizeof(Glyph));
1727 }
1728 if (col > term.col) {
1729 bool *bp = term.tabs + term.col;
1730
1731 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
1732 while (--bp > term.tabs && !*bp)
1733 /* nothing */ ;
1734 for (bp += TAB; bp < term.tabs + col; bp += TAB)
1735 *bp = 1;
1736 }
1737 /* update terminal size */
1738 term.col = col, term.row = row;
1739 /* make use of the LIMIT in tmoveto */
1740 tmoveto(term.c.x, term.c.y);
1741 /* reset scrolling region */
1742 tsetscroll(0, row-1);
1743
1744 return (slide > 0);
1745 }
1746
1747 void
1748 xresize(int col, int row) {
1749 xw.w = MAX(1, 2*BORDER + col * xw.cw);
1750 xw.h = MAX(1, 2*BORDER + row * xw.ch);
1751 }
1752
1753 void
1754 xloadcols(void) {
1755 int i, r, g, b;
1756 XColor color;
1757 ulong white = WhitePixel(xw.dpy, xw.scr);
1758
1759 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
1760 for(i = 0; i < LEN(colorname); i++) {
1761 if(!colorname[i])
1762 continue;
1763 if(!XAllocNamedColor(xw.dpy, xw.cmap, colorname[i], &color, &color)) {
1764 dc.col[i] = white;
1765 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1766 } else
1767 dc.col[i] = color.pixel;
1768 }
1769
1770 /* load colors [16-255] ; same colors as xterm */
1771 for(i = 16, r = 0; r < 6; r++)
1772 for(g = 0; g < 6; g++)
1773 for(b = 0; b < 6; b++) {
1774 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1775 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1776 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1777 if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
1778 dc.col[i] = white;
1779 fprintf(stderr, "Could not allocate color %d\n", i);
1780 } else
1781 dc.col[i] = color.pixel;
1782 i++;
1783 }
1784
1785 for(r = 0; r < 24; r++, i++) {
1786 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1787 if (!XAllocColor(xw.dpy, xw.cmap, &color)) {
1788 dc.col[i] = white;
1789 fprintf(stderr, "Could not allocate color %d\n", i);
1790 } else
1791 dc.col[i] = color.pixel;
1792 }
1793 }
1794
1795 void
1796 xclear(int x1, int y1, int x2, int y2) {
1797 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
1798 XFillRectangle(xw.dpy, xw.buf, dc.gc,
1799 BORDER + x1 * xw.cw, BORDER + y1 * xw.ch,
1800 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1801 }
1802
1803 void
1804 xhints(void) {
1805 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
1806 XWMHints wm = {.flags = InputHint, .input = 1};
1807 XSizeHints size = {
1808 .flags = PSize | PResizeInc | PBaseSize,
1809 .height = xw.h,
1810 .width = xw.w,
1811 .height_inc = xw.ch,
1812 .width_inc = xw.cw,
1813 .base_height = 2*BORDER,
1814 .base_width = 2*BORDER,
1815 };
1816 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1817 }
1818
1819 XFontSet
1820 xinitfont(char *fontstr) {
1821 XFontSet set;
1822 char *def, **missing;
1823 int n;
1824
1825 missing = NULL;
1826 set = XCreateFontSet(xw.dpy, fontstr, &missing, &n, &def);
1827 if(missing) {
1828 while(n--)
1829 fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
1830 XFreeStringList(missing);
1831 }
1832 return set;
1833 }
1834
1835 void
1836 xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing) {
1837 XFontStruct **xfonts;
1838 char **font_names;
1839 int i, n;
1840
1841 *ascent = *descent = *lbearing = *rbearing = 0;
1842 n = XFontsOfFontSet(set, &xfonts, &font_names);
1843 for(i = 0; i < n; i++) {
1844 *ascent = MAX(*ascent, (*xfonts)->ascent);
1845 *descent = MAX(*descent, (*xfonts)->descent);
1846 *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
1847 *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
1848 xfonts++;
1849 }
1850 }
1851
1852 void
1853 initfonts(char *fontstr, char *bfontstr) {
1854 if((dc.font.set = xinitfont(fontstr)) == NULL ||
1855 (dc.bfont.set = xinitfont(bfontstr)) == NULL)
1856 die("Can't load font %s\n", dc.font.set ? BOLDFONT : FONT);
1857 xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
1858 &dc.font.lbearing, &dc.font.rbearing);
1859 xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
1860 &dc.bfont.lbearing, &dc.bfont.rbearing);
1861 }
1862
1863 void
1864 xinit(void) {
1865 XSetWindowAttributes attrs;
1866 Cursor cursor;
1867 Window parent;
1868
1869 if(!(xw.dpy = XOpenDisplay(NULL)))
1870 die("Can't open display\n");
1871 xw.scr = XDefaultScreen(xw.dpy);
1872
1873 /* font */
1874 initfonts(FONT, BOLDFONT);
1875
1876 /* XXX: Assuming same size for bold font */
1877 xw.cw = dc.font.rbearing - dc.font.lbearing;
1878 xw.ch = dc.font.ascent + dc.font.descent;
1879
1880 /* colors */
1881 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1882 xloadcols();
1883
1884 /* window - default size */
1885 xw.h = 2*BORDER + term.row * xw.ch;
1886 xw.w = 2*BORDER + term.col * xw.cw;
1887
1888 attrs.background_pixel = dc.col[DefaultBG];
1889 attrs.border_pixel = dc.col[DefaultBG];
1890 attrs.bit_gravity = NorthWestGravity;
1891 attrs.event_mask = FocusChangeMask | KeyPressMask
1892 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1893 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask
1894 | EnterWindowMask | LeaveWindowMask;
1895 attrs.colormap = xw.cmap;
1896
1897 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
1898 xw.win = XCreateWindow(xw.dpy, parent, 0, 0,
1899 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
1900 XDefaultVisual(xw.dpy, xw.scr),
1901 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
1902 | CWColormap,
1903 &attrs);
1904 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
1905
1906
1907 /* input methods */
1908 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
1909 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
1910 | XIMStatusNothing, XNClientWindow, xw.win,
1911 XNFocusWindow, xw.win, NULL);
1912 /* gc */
1913 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
1914
1915 /* white cursor, black outline */
1916 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
1917 XDefineCursor(xw.dpy, xw.win, cursor);
1918 XRecolorCursor(xw.dpy, cursor,
1919 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
1920 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
1921
1922 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
1923
1924 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
1925 XMapWindow(xw.dpy, xw.win);
1926 xhints();
1927 XSync(xw.dpy, 0);
1928 }
1929
1930 void
1931 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
1932 int fg = base.fg, bg = base.bg, temp;
1933 int winx = BORDER+x*xw.cw, winy = BORDER+y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
1934 XFontSet fontset = dc.font.set;
1935 int i;
1936
1937 /* only switch default fg/bg if term is in RV mode */
1938 if(IS_SET(MODE_REVERSE)) {
1939 if(fg == DefaultFG)
1940 fg = DefaultBG;
1941 if(bg == DefaultBG)
1942 bg = DefaultFG;
1943 }
1944
1945 if(base.mode & ATTR_REVERSE)
1946 temp = fg, fg = bg, bg = temp;
1947
1948 if(base.mode & ATTR_BOLD) {
1949 fg += 8;
1950 fontset = dc.bfont.set;
1951 }
1952
1953 XSetBackground(xw.dpy, dc.gc, dc.col[bg]);
1954 XSetForeground(xw.dpy, dc.gc, dc.col[fg]);
1955
1956 if(base.mode & ATTR_GFX) {
1957 for(i = 0; i < bytelen; i++) {
1958 char c = gfx[(uint)s[i] % 256];
1959 if(c)
1960 s[i] = c;
1961 else if(s[i] > 0x5f)
1962 s[i] -= 0x5f;
1963 }
1964 }
1965
1966 XmbDrawImageString(xw.dpy, xw.buf, fontset, dc.gc, winx, winy, s, bytelen);
1967
1968 if(base.mode & ATTR_UNDERLINE)
1969 XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1970 }
1971
1972 /* copy buffer pixmap to screen pixmap */
1973 void
1974 xcopy() {
1975 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
1976 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
1977
1978 }
1979
1980 void
1981 xdrawcursor(void) {
1982 static int oldx = 0;
1983 static int oldy = 0;
1984 int sl;
1985 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
1986
1987 LIMIT(oldx, 0, term.col-1);
1988 LIMIT(oldy, 0, term.row-1);
1989
1990 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
1991 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
1992
1993 /* remove the old cursor */
1994 if(term.line[oldy][oldx].state & GLYPH_SET) {
1995 sl = utf8size(term.line[oldy][oldx].c);
1996 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
1997 } else
1998 xclear(oldx, oldy, oldx, oldy);
1999
2000 xcopy(oldx, oldy, 1, 1);
2001
2002 /* draw the new one */
2003 if(!(term.c.state & CURSOR_HIDE)) {
2004 if(!(xw.state & WIN_FOCUSED))
2005 g.bg = DefaultUCS;
2006
2007 if(IS_SET(MODE_REVERSE))
2008 g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
2009
2010 sl = utf8size(g.c);
2011 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2012 oldx = term.c.x, oldy = term.c.y;
2013 }
2014
2015 xcopy(term.c.x, term.c.y, 1, 1);
2016 }
2017
2018 void
2019 draw() {
2020 drawregion(0, 0, term.col, term.row);
2021 xcopy();
2022 gettimeofday(&xw.lastdraw, NULL);
2023 }
2024
2025 void
2026 drawregion(int x1, int y1, int x2, int y2) {
2027 int ic, ib, x, y, ox, sl;
2028 Glyph base, new;
2029 char buf[DRAW_BUF_SIZ];
2030
2031 if(!(xw.state & WIN_VISIBLE))
2032 return;
2033
2034 for(y = y1; y < y2; y++) {
2035 if(!term.dirty[y])
2036 continue;
2037 xclear(0, y, term.col, y);
2038 term.dirty[y] = 0;
2039 base = term.line[y][0];
2040 ic = ib = ox = 0;
2041 for(x = x1; x < x2; x++) {
2042 new = term.line[y][x];
2043 if(sel.bx != -1 && *(new.c) && selected(x, y))
2044 new.mode ^= ATTR_REVERSE;
2045 if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
2046 ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2047 xdraws(buf, base, ox, y, ic, ib);
2048 ic = ib = 0;
2049 }
2050 if(new.state & GLYPH_SET) {
2051 if(ib == 0) {
2052 ox = x;
2053 base = new;
2054 }
2055 sl = utf8size(new.c);
2056 memcpy(buf+ib, new.c, sl);
2057 ib += sl;
2058 ++ic;
2059 }
2060 }
2061 if(ib > 0)
2062 xdraws(buf, base, ox, y, ic, ib);
2063 }
2064 xdrawcursor();
2065 }
2066
2067 void
2068 expose(XEvent *ev) {
2069 XExposeEvent *e = &ev->xexpose;
2070 if(xw.state & WIN_REDRAW) {
2071 if(!e->count)
2072 xw.state &= ~WIN_REDRAW;
2073 }
2074 xcopy();
2075 }
2076
2077 void
2078 visibility(XEvent *ev) {
2079 XVisibilityEvent *e = &ev->xvisibility;
2080 if(e->state == VisibilityFullyObscured)
2081 xw.state &= ~WIN_VISIBLE;
2082 else if(!(xw.state & WIN_VISIBLE))
2083 /* need a full redraw for next Expose, not just a buf copy */
2084 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2085 }
2086
2087 void
2088 unmap(XEvent *ev) {
2089 xw.state &= ~WIN_VISIBLE;
2090 }
2091
2092 void
2093 xseturgency(int add) {
2094 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2095 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2096 XSetWMHints(xw.dpy, xw.win, h);
2097 XFree(h);
2098 }
2099
2100 void
2101 focus(XEvent *ev) {
2102 if(ev->type == FocusIn) {
2103 xw.state |= WIN_FOCUSED;
2104 xseturgency(0);
2105 } else
2106 xw.state &= ~WIN_FOCUSED;
2107 draw();
2108 }
2109
2110 char*
2111 kmap(KeySym k, uint state) {
2112 int i;
2113 state &= ~Mod2Mask;
2114 for(i = 0; i < LEN(key); i++) {
2115 uint mask = key[i].mask;
2116 if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
2117 return (char*)key[i].s;
2118 }
2119 return NULL;
2120 }
2121
2122 void
2123 kpress(XEvent *ev) {
2124 XKeyEvent *e = &ev->xkey;
2125 KeySym ksym;
2126 char buf[32];
2127 char *customkey;
2128 int len;
2129 int meta;
2130 int shift;
2131 Status status;
2132
2133 meta = e->state & Mod1Mask;
2134 shift = e->state & ShiftMask;
2135 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
2136
2137 /* 1. custom keys from config.h */
2138 if((customkey = kmap(ksym, e->state)))
2139 ttywrite(customkey, strlen(customkey));
2140 /* 2. hardcoded (overrides X lookup) */
2141 else
2142 switch(ksym) {
2143 case XK_Up:
2144 case XK_Down:
2145 case XK_Left:
2146 case XK_Right:
2147 /* XXX: shift up/down doesn't work */
2148 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
2149 ttywrite(buf, 3);
2150 break;
2151 case XK_Insert:
2152 if(shift)
2153 selpaste();
2154 break;
2155 case XK_Return:
2156 if(IS_SET(MODE_CRLF))
2157 ttywrite("\r\n", 2);
2158 else
2159 ttywrite("\r", 1);
2160 break;
2161 /* 3. X lookup */
2162 default:
2163 if(len > 0) {
2164 if(meta && len == 1)
2165 ttywrite("\033", 1);
2166 ttywrite(buf, len);
2167 }
2168 break;
2169 }
2170 }
2171
2172 void
2173 cmessage(XEvent *e) {
2174 /* See xembed specs
2175 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2176 if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2177 if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2178 xw.state |= WIN_FOCUSED;
2179 xseturgency(0);
2180 } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2181 xw.state &= ~WIN_FOCUSED;
2182 }
2183 draw();
2184 }
2185 }
2186
2187 void
2188 resize(XEvent *e) {
2189 int col, row;
2190
2191 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2192 return;
2193
2194 xw.w = e->xconfigure.width;
2195 xw.h = e->xconfigure.height;
2196 col = (xw.w - 2*BORDER) / xw.cw;
2197 row = (xw.h - 2*BORDER) / xw.ch;
2198 if(col == term.col && row == term.row)
2199 return;
2200 if(tresize(col, row))
2201 draw();
2202 ttyresize(col, row);
2203 xresize(col, row);
2204 }
2205
2206 bool
2207 last_draw_too_old(void) {
2208 struct timeval now;
2209 gettimeofday(&now, NULL);
2210 return TIMEDIFF(now, xw.lastdraw) >= DRAW_TIMEOUT/1000;
2211 }
2212
2213 void
2214 run(void) {
2215 XEvent ev;
2216 fd_set rfd;
2217 int xfd = XConnectionNumber(xw.dpy);
2218 struct timeval timeout = {0};
2219 bool stuff_to_print = 0;
2220
2221 for(;;) {
2222 FD_ZERO(&rfd);
2223 FD_SET(cmdfd, &rfd);
2224 FD_SET(xfd, &rfd);
2225 timeout.tv_sec = 0;
2226 timeout.tv_usec = SELECT_TIMEOUT;
2227 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, &timeout) < 0) {
2228 if(errno == EINTR)
2229 continue;
2230 die("select failed: %s\n", SERRNO);
2231 }
2232 if(FD_ISSET(cmdfd, &rfd)) {
2233 ttyread();
2234 stuff_to_print = 1;
2235 }
2236
2237 if(stuff_to_print && last_draw_too_old()) {
2238 stuff_to_print = 0;
2239 draw();
2240 }
2241
2242 while(XPending(xw.dpy)) {
2243 XNextEvent(xw.dpy, &ev);
2244 if(XFilterEvent(&ev, xw.win))
2245 continue;
2246 if(handler[ev.type])
2247 (handler[ev.type])(&ev);
2248 }
2249 }
2250 }
2251
2252 int
2253 main(int argc, char *argv[]) {
2254 int i;
2255
2256 for(i = 1; i < argc; i++) {
2257 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2258 case 't':
2259 if(++i < argc) opt_title = argv[i];
2260 break;
2261 case 'c':
2262 if(++i < argc) opt_class = argv[i];
2263 break;
2264 case 'w':
2265 if(++i < argc) opt_embed = argv[i];
2266 break;
2267 case 'e':
2268 /* eat every remaining arguments */
2269 if(++i < argc) opt_cmd = &argv[i];
2270 goto run;
2271 case 'v':
2272 default:
2273 die(USAGE);
2274 }
2275 }
2276
2277 run:
2278 setlocale(LC_CTYPE, "");
2279 tnew(80, 24);
2280 ttynew();
2281 xinit();
2282 selinit();
2283 run();
2284 return 0;
2285 }