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[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(void);
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 tfulldirt(void);
277
278 static void ttynew(void);
279 static void ttyread(void);
280 static void ttyresize(int, int);
281 static void ttywrite(const char *, size_t);
282
283 static void xdraws(char *, Glyph, int, int, int, int);
284 static void xhints(void);
285 static void xclear(int, int, int, int);
286 static void xcopy();
287 static void xdrawcursor(void);
288 static void xinit(void);
289 static void xloadcols(void);
290 static void xseturgency(int);
291 static void xsetsel(char*);
292 static void xresize(int, int);
293
294 static void expose(XEvent *);
295 static void visibility(XEvent *);
296 static void unmap(XEvent *);
297 static char* kmap(KeySym, uint);
298 static void kpress(XEvent *);
299 static void cmessage(XEvent *);
300 static void resize(XEvent *);
301 static void focus(XEvent *);
302 static void brelease(XEvent *);
303 static void bpress(XEvent *);
304 static void bmotion(XEvent *);
305 static void selnotify(XEvent *);
306 static void selrequest(XEvent *);
307
308 static void selinit(void);
309 static inline bool selected(int, int);
310 static void selcopy(void);
311 static void selpaste();
312 static void selscroll(int, int);
313
314 static int utf8decode(char *, long *);
315 static int utf8encode(long *, char *);
316 static int utf8size(char *);
317 static int isfullutf8(char *, int);
318
319 static void (*handler[LASTEvent])(XEvent *) = {
320 [KeyPress] = kpress,
321 [ClientMessage] = cmessage,
322 [ConfigureNotify] = resize,
323 [VisibilityNotify] = visibility,
324 [UnmapNotify] = unmap,
325 [Expose] = expose,
326 [FocusIn] = focus,
327 [FocusOut] = focus,
328 [MotionNotify] = bmotion,
329 [ButtonPress] = bpress,
330 [ButtonRelease] = brelease,
331 [SelectionNotify] = selnotify,
332 [SelectionRequest] = selrequest,
333 };
334
335 /* Globals */
336 static DC dc;
337 static XWindow xw;
338 static Term term;
339 static CSIEscape csiescseq;
340 static STREscape strescseq;
341 static int cmdfd;
342 static pid_t pid;
343 static Selection sel;
344 static char **opt_cmd = NULL;
345 static char *opt_title = NULL;
346 static char *opt_embed = NULL;
347 static char *opt_class = NULL;
348
349 int
350 utf8decode(char *s, long *u) {
351 uchar c;
352 int i, n, rtn;
353
354 rtn = 1;
355 c = *s;
356 if(~c & B7) { /* 0xxxxxxx */
357 *u = c;
358 return rtn;
359 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
360 *u = c&(B4|B3|B2|B1|B0);
361 n = 1;
362 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
363 *u = c&(B3|B2|B1|B0);
364 n = 2;
365 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
366 *u = c & (B2|B1|B0);
367 n = 3;
368 } else
369 goto invalid;
370 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
371 c = *s;
372 if((c & (B7|B6)) != B7) /* 10xxxxxx */
373 goto invalid;
374 *u <<= 6;
375 *u |= c & (B5|B4|B3|B2|B1|B0);
376 }
377 if((n == 1 && *u < 0x80) ||
378 (n == 2 && *u < 0x800) ||
379 (n == 3 && *u < 0x10000) ||
380 (*u >= 0xD800 && *u <= 0xDFFF))
381 goto invalid;
382 return rtn;
383 invalid:
384 *u = 0xFFFD;
385 return rtn;
386 }
387
388 int
389 utf8encode(long *u, char *s) {
390 uchar *sp;
391 ulong uc;
392 int i, n;
393
394 sp = (uchar*) s;
395 uc = *u;
396 if(uc < 0x80) {
397 *sp = uc; /* 0xxxxxxx */
398 return 1;
399 } else if(*u < 0x800) {
400 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
401 n = 1;
402 } else if(uc < 0x10000) {
403 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
404 n = 2;
405 } else if(uc <= 0x10FFFF) {
406 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
407 n = 3;
408 } else {
409 goto invalid;
410 }
411 for(i=n,++sp; i>0; --i,++sp)
412 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
413 return n+1;
414 invalid:
415 /* U+FFFD */
416 *s++ = '\xEF';
417 *s++ = '\xBF';
418 *s = '\xBD';
419 return 3;
420 }
421
422 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
423 UTF-8 otherwise return 0 */
424 int
425 isfullutf8(char *s, int b) {
426 uchar *c1, *c2, *c3;
427
428 c1 = (uchar *) s;
429 c2 = (uchar *) ++s;
430 c3 = (uchar *) ++s;
431 if(b < 1)
432 return 0;
433 else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
434 return 0;
435 else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
436 ((b == 1) ||
437 ((b == 2) && (*c2&(B7|B6)) == B7)))
438 return 0;
439 else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
440 ((b == 1) ||
441 ((b == 2) && (*c2&(B7|B6)) == B7) ||
442 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7)))
443 return 0;
444 else
445 return 1;
446 }
447
448 int
449 utf8size(char *s) {
450 uchar c = *s;
451
452 if(~c&B7)
453 return 1;
454 else if((c&(B7|B6|B5)) == (B7|B6))
455 return 2;
456 else if((c&(B7|B6|B5|B4)) == (B7|B6|B5))
457 return 3;
458 else
459 return 4;
460 }
461
462 void
463 selinit(void) {
464 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
465 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
466 sel.mode = 0;
467 sel.bx = -1;
468 sel.clip = NULL;
469 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
470 if(sel.xtarget == None)
471 sel.xtarget = XA_STRING;
472 }
473
474 static inline bool
475 selected(int x, int y) {
476 if(sel.ey == y && sel.by == y) {
477 int bx = MIN(sel.bx, sel.ex);
478 int ex = MAX(sel.bx, sel.ex);
479 return BETWEEN(x, bx, ex);
480 }
481 return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
482 || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
483 }
484
485 void
486 getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
487 if(b)
488 *b = e->xbutton.button;
489
490 *x = X2COL(e->xbutton.x);
491 *y = Y2ROW(e->xbutton.y);
492 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
493 sel.b.y = MIN(sel.by, sel.ey);
494 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
495 sel.e.y = MAX(sel.by, sel.ey);
496 }
497
498 void
499 mousereport(XEvent *e) {
500 int x = X2COL(e->xbutton.x);
501 int y = Y2ROW(e->xbutton.y);
502 int button = e->xbutton.button;
503 int state = e->xbutton.state;
504 char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
505 static int ob, ox, oy;
506
507 /* from urxvt */
508 if(e->xbutton.type == MotionNotify) {
509 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
510 return;
511 button = ob + 32;
512 ox = x, oy = y;
513 } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
514 button = 3;
515 } else {
516 button -= Button1;
517 if(button >= 3)
518 button += 64 - 3;
519 if(e->xbutton.type == ButtonPress) {
520 ob = button;
521 ox = x, oy = y;
522 }
523 }
524
525 buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
526 + (state & Mod4Mask ? 8 : 0)
527 + (state & ControlMask ? 16 : 0);
528
529 ttywrite(buf, sizeof(buf));
530 }
531
532 void
533 bpress(XEvent *e) {
534 if(IS_SET(MODE_MOUSE))
535 mousereport(e);
536 else if(e->xbutton.button == Button1) {
537 if(sel.bx != -1)
538 tsetdirt(sel.b.y, sel.e.y);
539 sel.mode = 1;
540 sel.ex = sel.bx = X2COL(e->xbutton.x);
541 sel.ey = sel.by = Y2ROW(e->xbutton.y);
542 }
543 }
544
545 void
546 selcopy(void) {
547 char *str, *ptr;
548 int x, y, bufsize, is_selected = 0;
549
550 if(sel.bx == -1)
551 str = NULL;
552
553 else {
554 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
555 ptr = str = malloc(bufsize);
556
557 /* append every set & selected glyph to the selection */
558 for(y = 0; y < term.row; y++) {
559 for(x = 0; x < term.col; x++) {
560 is_selected = selected(x, y);
561 if((term.line[y][x].state & GLYPH_SET) && is_selected) {
562 int size = utf8size(term.line[y][x].c);
563 memcpy(ptr, term.line[y][x].c, size);
564 ptr += size;
565 }
566 }
567
568 /* \n at the end of every selected line except for the last one */
569 if(is_selected && y < sel.e.y)
570 *ptr++ = '\n';
571 }
572 *ptr = 0;
573 }
574 xsetsel(str);
575 }
576
577 void
578 selnotify(XEvent *e) {
579 ulong nitems, ofs, rem;
580 int format;
581 uchar *data;
582 Atom type;
583
584 ofs = 0;
585 do {
586 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
587 False, AnyPropertyType, &type, &format,
588 &nitems, &rem, &data)) {
589 fprintf(stderr, "Clipboard allocation failed\n");
590 return;
591 }
592 ttywrite((const char *) data, nitems * format / 8);
593 XFree(data);
594 /* number of 32-bit chunks returned */
595 ofs += nitems * format / 32;
596 } while(rem > 0);
597 }
598
599 void
600 selpaste() {
601 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY, xw.win, CurrentTime);
602 }
603
604 void
605 selrequest(XEvent *e) {
606 XSelectionRequestEvent *xsre;
607 XSelectionEvent xev;
608 Atom xa_targets;
609
610 xsre = (XSelectionRequestEvent *) e;
611 xev.type = SelectionNotify;
612 xev.requestor = xsre->requestor;
613 xev.selection = xsre->selection;
614 xev.target = xsre->target;
615 xev.time = xsre->time;
616 /* reject */
617 xev.property = None;
618
619 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
620 if(xsre->target == xa_targets) {
621 /* respond with the supported type */
622 Atom string = sel.xtarget;
623 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
624 XA_ATOM, 32, PropModeReplace,
625 (uchar *) &string, 1);
626 xev.property = xsre->property;
627 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
628 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
629 xsre->target, 8, PropModeReplace,
630 (uchar *) sel.clip, strlen(sel.clip));
631 xev.property = xsre->property;
632 }
633
634 /* all done, send a notification to the listener */
635 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
636 fprintf(stderr, "Error sending SelectionNotify event\n");
637 }
638
639 void
640 xsetsel(char *str) {
641 /* register the selection for both the clipboard and the primary */
642 Atom clipboard;
643
644 free(sel.clip);
645 sel.clip = str;
646
647 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
648
649 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
650 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
651
652 XFlush(xw.dpy);
653 }
654
655 void
656 brelease(XEvent *e) {
657 if(IS_SET(MODE_MOUSE)) {
658 mousereport(e);
659 return;
660 }
661 if(e->xbutton.button == Button2)
662 selpaste();
663 else if(e->xbutton.button == Button1) {
664 sel.mode = 0;
665 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
666 term.dirty[sel.ey] = 1;
667 if(sel.bx == sel.ex && sel.by == sel.ey) {
668 struct timeval now;
669 sel.bx = -1;
670 gettimeofday(&now, NULL);
671
672 if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
673 /* triple click on the line */
674 sel.b.x = sel.bx = 0;
675 sel.e.x = sel.ex = term.col;
676 sel.b.y = sel.e.y = sel.ey;
677 selcopy();
678 } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
679 /* double click to select word */
680 sel.bx = sel.ex;
681 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
682 term.line[sel.ey][sel.bx-1].c[0] != ' ') sel.bx--;
683 sel.b.x = sel.bx;
684 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
685 term.line[sel.ey][sel.ex+1].c[0] != ' ') sel.ex++;
686 sel.e.x = sel.ex;
687 sel.b.y = sel.e.y = sel.ey;
688 selcopy();
689 }
690 } else
691 selcopy();
692 }
693 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
694 gettimeofday(&sel.tclick1, NULL);
695 draw();
696 }
697
698 void
699 bmotion(XEvent *e) {
700 if(IS_SET(MODE_MOUSE)) {
701 mousereport(e);
702 return;
703 }
704 if(sel.mode) {
705 int oldey = sel.ey, oldex = sel.ex;
706 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
707
708 if(oldey != sel.ey || oldex != sel.ex) {
709 int starty = MIN(oldey, sel.ey);
710 int endy = MAX(oldey, sel.ey);
711 tsetdirt(starty, endy);
712 draw();
713 }
714 }
715 }
716
717 void
718 die(const char *errstr, ...) {
719 va_list ap;
720
721 va_start(ap, errstr);
722 vfprintf(stderr, errstr, ap);
723 va_end(ap);
724 exit(EXIT_FAILURE);
725 }
726
727 void
728 execsh(void) {
729 char **args;
730 char *envshell = getenv("SHELL");
731
732 DEFAULT(envshell, SHELL);
733 putenv("TERM="TNAME);
734 args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
735 execvp(args[0], args);
736 exit(EXIT_FAILURE);
737 }
738
739 void
740 sigchld(int a) {
741 int stat = 0;
742 if(waitpid(pid, &stat, 0) < 0)
743 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
744 if(WIFEXITED(stat))
745 exit(WEXITSTATUS(stat));
746 else
747 exit(EXIT_FAILURE);
748 }
749
750 void
751 ttynew(void) {
752 int m, s;
753
754 /* seems to work fine on linux, openbsd and freebsd */
755 struct winsize w = {term.row, term.col, 0, 0};
756 if(openpty(&m, &s, NULL, NULL, &w) < 0)
757 die("openpty failed: %s\n", SERRNO);
758
759 switch(pid = fork()) {
760 case -1:
761 die("fork failed\n");
762 break;
763 case 0:
764 setsid(); /* create a new process group */
765 dup2(s, STDIN_FILENO);
766 dup2(s, STDOUT_FILENO);
767 dup2(s, STDERR_FILENO);
768 if(ioctl(s, TIOCSCTTY, NULL) < 0)
769 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
770 close(s);
771 close(m);
772 execsh();
773 break;
774 default:
775 close(s);
776 cmdfd = m;
777 signal(SIGCHLD, sigchld);
778 }
779 }
780
781 void
782 dump(char c) {
783 static int col;
784 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
785 if(++col % 10 == 0)
786 fprintf(stderr, "\n");
787 }
788
789 void
790 ttyread(void) {
791 static char buf[BUFSIZ];
792 static int buflen = 0;
793 char *ptr;
794 char s[UTF_SIZ];
795 int charsize; /* size of utf8 char in bytes */
796 long utf8c;
797 int ret;
798
799 /* append read bytes to unprocessed bytes */
800 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
801 die("Couldn't read from shell: %s\n", SERRNO);
802
803 /* process every complete utf8 char */
804 buflen += ret;
805 ptr = buf;
806 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
807 charsize = utf8decode(ptr, &utf8c);
808 utf8encode(&utf8c, s);
809 tputc(s);
810 ptr += charsize;
811 buflen -= charsize;
812 }
813
814 /* keep any uncomplete utf8 char for the next call */
815 memmove(buf, ptr, buflen);
816 }
817
818 void
819 ttywrite(const char *s, size_t n) {
820 if(write(cmdfd, s, n) == -1)
821 die("write error on tty: %s\n", SERRNO);
822 }
823
824 void
825 ttyresize(int x, int y) {
826 struct winsize w;
827
828 w.ws_row = term.row;
829 w.ws_col = term.col;
830 w.ws_xpixel = w.ws_ypixel = 0;
831 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
832 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
833 }
834
835 void
836 tsetdirt(int top, int bot)
837 {
838 int i;
839
840 LIMIT(top, 0, term.row-1);
841 LIMIT(bot, 0, term.row-1);
842
843 for(i = top; i <= bot; i++)
844 term.dirty[i] = 1;
845 }
846
847 void
848 tfulldirt(void)
849 {
850 tsetdirt(0, term.row-1);
851 }
852
853 void
854 tcursor(int mode) {
855 static TCursor c;
856
857 if(mode == CURSOR_SAVE)
858 c = term.c;
859 else if(mode == CURSOR_LOAD)
860 term.c = c, tmoveto(c.x, c.y);
861 }
862
863 void
864 treset(void) {
865 unsigned i;
866 term.c = (TCursor){{
867 .mode = ATTR_NULL,
868 .fg = DefaultFG,
869 .bg = DefaultBG
870 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
871
872 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
873 for (i = TAB; i < term.col; i += TAB)
874 term.tabs[i] = 1;
875 term.top = 0, term.bot = term.row - 1;
876 term.mode = MODE_WRAP;
877 tclearregion(0, 0, term.col-1, term.row-1);
878 }
879
880 void
881 tnew(int col, int row) {
882 /* set screen size */
883 term.row = row, term.col = col;
884 term.line = malloc(term.row * sizeof(Line));
885 term.alt = malloc(term.row * sizeof(Line));
886 term.dirty = malloc(term.row * sizeof(*term.dirty));
887 term.tabs = malloc(term.col * sizeof(*term.tabs));
888
889 for(row = 0; row < term.row; row++) {
890 term.line[row] = malloc(term.col * sizeof(Glyph));
891 term.alt [row] = malloc(term.col * sizeof(Glyph));
892 term.dirty[row] = 0;
893 }
894 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
895 /* setup screen */
896 treset();
897 }
898
899 void
900 tswapscreen(void) {
901 Line* tmp = term.line;
902 term.line = term.alt;
903 term.alt = tmp;
904 term.mode ^= MODE_ALTSCREEN;
905 tfulldirt();
906 }
907
908 void
909 tscrolldown(int orig, int n) {
910 int i;
911 Line temp;
912
913 LIMIT(n, 0, term.bot-orig+1);
914
915 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
916
917 for(i = term.bot; i >= orig+n; i--) {
918 temp = term.line[i];
919 term.line[i] = term.line[i-n];
920 term.line[i-n] = temp;
921
922 term.dirty[i] = 1;
923 term.dirty[i-n] = 1;
924 }
925
926 selscroll(orig, n);
927 }
928
929 void
930 tscrollup(int orig, int n) {
931 int i;
932 Line temp;
933 LIMIT(n, 0, term.bot-orig+1);
934
935 tclearregion(0, orig, term.col-1, orig+n-1);
936
937 for(i = orig; i <= term.bot-n; i++) {
938 temp = term.line[i];
939 term.line[i] = term.line[i+n];
940 term.line[i+n] = temp;
941
942 term.dirty[i] = 1;
943 term.dirty[i+n] = 1;
944 }
945
946 selscroll(orig, -n);
947 }
948
949 void
950 selscroll(int orig, int n) {
951 if(sel.bx == -1)
952 return;
953
954 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
955 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
956 sel.bx = -1;
957 return;
958 }
959 if(sel.by < term.top) {
960 sel.by = term.top;
961 sel.bx = 0;
962 }
963 if(sel.ey > term.bot) {
964 sel.ey = term.bot;
965 sel.ex = term.col;
966 }
967 sel.b.y = sel.by, sel.b.x = sel.bx;
968 sel.e.y = sel.ey, sel.e.x = sel.ex;
969 }
970 }
971
972 void
973 tnewline(int first_col) {
974 int y = term.c.y;
975 if(y == term.bot)
976 tscrollup(term.top, 1);
977 else
978 y++;
979 tmoveto(first_col ? 0 : term.c.x, y);
980 }
981
982 void
983 csiparse(void) {
984 /* int noarg = 1; */
985 char *p = csiescseq.buf;
986
987 csiescseq.narg = 0;
988 if(*p == '?')
989 csiescseq.priv = 1, p++;
990
991 while(p < csiescseq.buf+csiescseq.len) {
992 while(isdigit(*p)) {
993 csiescseq.arg[csiescseq.narg] *= 10;
994 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
995 }
996 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ)
997 csiescseq.narg++, p++;
998 else {
999 csiescseq.mode = *p;
1000 csiescseq.narg++;
1001 return;
1002 }
1003 }
1004 }
1005
1006 void
1007 tmoveto(int x, int y) {
1008 LIMIT(x, 0, term.col-1);
1009 LIMIT(y, 0, term.row-1);
1010 term.c.state &= ~CURSOR_WRAPNEXT;
1011 term.c.x = x;
1012 term.c.y = y;
1013 }
1014
1015 void
1016 tsetchar(char *c) {
1017 term.dirty[term.c.y] = 1;
1018 term.line[term.c.y][term.c.x] = term.c.attr;
1019 memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
1020 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
1021 }
1022
1023 void
1024 tclearregion(int x1, int y1, int x2, int y2) {
1025 int x, y, temp;
1026
1027 if(x1 > x2)
1028 temp = x1, x1 = x2, x2 = temp;
1029 if(y1 > y2)
1030 temp = y1, y1 = y2, y2 = temp;
1031
1032 LIMIT(x1, 0, term.col-1);
1033 LIMIT(x2, 0, term.col-1);
1034 LIMIT(y1, 0, term.row-1);
1035 LIMIT(y2, 0, term.row-1);
1036
1037 for(y = y1; y <= y2; y++) {
1038 term.dirty[y] = 1;
1039 for(x = x1; x <= x2; x++)
1040 term.line[y][x].state = 0;
1041 }
1042 }
1043
1044 void
1045 tdeletechar(int n) {
1046 int src = term.c.x + n;
1047 int dst = term.c.x;
1048 int size = term.col - src;
1049
1050 term.dirty[term.c.y] = 1;
1051
1052 if(src >= term.col) {
1053 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1054 return;
1055 }
1056 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1057 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1058 }
1059
1060 void
1061 tinsertblank(int n) {
1062 int src = term.c.x;
1063 int dst = src + n;
1064 int size = term.col - dst;
1065
1066 term.dirty[term.c.y] = 1;
1067
1068 if(dst >= term.col) {
1069 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1070 return;
1071 }
1072 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1073 tclearregion(src, term.c.y, dst - 1, term.c.y);
1074 }
1075
1076 void
1077 tinsertblankline(int n) {
1078 if(term.c.y < term.top || term.c.y > term.bot)
1079 return;
1080
1081 tscrolldown(term.c.y, n);
1082 }
1083
1084 void
1085 tdeleteline(int n) {
1086 if(term.c.y < term.top || term.c.y > term.bot)
1087 return;
1088
1089 tscrollup(term.c.y, n);
1090 }
1091
1092 void
1093 tsetattr(int *attr, int l) {
1094 int i;
1095
1096 for(i = 0; i < l; i++) {
1097 switch(attr[i]) {
1098 case 0:
1099 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
1100 term.c.attr.fg = DefaultFG;
1101 term.c.attr.bg = DefaultBG;
1102 break;
1103 case 1:
1104 term.c.attr.mode |= ATTR_BOLD;
1105 break;
1106 case 4:
1107 term.c.attr.mode |= ATTR_UNDERLINE;
1108 break;
1109 case 7:
1110 term.c.attr.mode |= ATTR_REVERSE;
1111 break;
1112 case 22:
1113 term.c.attr.mode &= ~ATTR_BOLD;
1114 break;
1115 case 24:
1116 term.c.attr.mode &= ~ATTR_UNDERLINE;
1117 break;
1118 case 27:
1119 term.c.attr.mode &= ~ATTR_REVERSE;
1120 break;
1121 case 38:
1122 if(i + 2 < l && attr[i + 1] == 5) {
1123 i += 2;
1124 if(BETWEEN(attr[i], 0, 255))
1125 term.c.attr.fg = attr[i];
1126 else
1127 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
1128 }
1129 else
1130 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
1131 break;
1132 case 39:
1133 term.c.attr.fg = DefaultFG;
1134 break;
1135 case 48:
1136 if(i + 2 < l && attr[i + 1] == 5) {
1137 i += 2;
1138 if(BETWEEN(attr[i], 0, 255))
1139 term.c.attr.bg = attr[i];
1140 else
1141 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
1142 }
1143 else
1144 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
1145 break;
1146 case 49:
1147 term.c.attr.bg = DefaultBG;
1148 break;
1149 default:
1150 if(BETWEEN(attr[i], 30, 37))
1151 term.c.attr.fg = attr[i] - 30;
1152 else if(BETWEEN(attr[i], 40, 47))
1153 term.c.attr.bg = attr[i] - 40;
1154 else if(BETWEEN(attr[i], 90, 97))
1155 term.c.attr.fg = attr[i] - 90 + 8;
1156 else if(BETWEEN(attr[i], 100, 107))
1157 term.c.attr.fg = attr[i] - 100 + 8;
1158 else
1159 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]), csidump();
1160
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 void
1182 csihandle(void) {
1183 switch(csiescseq.mode) {
1184 default:
1185 unknown:
1186 fprintf(stderr, "erresc: unknown csi ");
1187 csidump();
1188 /* die(""); */
1189 break;
1190 case '@': /* ICH -- Insert <n> blank char */
1191 DEFAULT(csiescseq.arg[0], 1);
1192 tinsertblank(csiescseq.arg[0]);
1193 break;
1194 case 'A': /* CUU -- Cursor <n> Up */
1195 case 'e':
1196 DEFAULT(csiescseq.arg[0], 1);
1197 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1198 break;
1199 case 'B': /* CUD -- Cursor <n> Down */
1200 DEFAULT(csiescseq.arg[0], 1);
1201 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1202 break;
1203 case 'C': /* CUF -- Cursor <n> Forward */
1204 case 'a':
1205 DEFAULT(csiescseq.arg[0], 1);
1206 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1207 break;
1208 case 'D': /* CUB -- Cursor <n> Backward */
1209 DEFAULT(csiescseq.arg[0], 1);
1210 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1211 break;
1212 case 'E': /* CNL -- Cursor <n> Down and first col */
1213 DEFAULT(csiescseq.arg[0], 1);
1214 tmoveto(0, term.c.y+csiescseq.arg[0]);
1215 break;
1216 case 'F': /* CPL -- Cursor <n> Up and first col */
1217 DEFAULT(csiescseq.arg[0], 1);
1218 tmoveto(0, term.c.y-csiescseq.arg[0]);
1219 break;
1220 case 'g': /* TBC -- Tabulation clear */
1221 switch (csiescseq.arg[0]) {
1222 case 0: /* clear current tab stop */
1223 term.tabs[term.c.x] = 0;
1224 break;
1225 case 3: /* clear all the tabs */
1226 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1227 break;
1228 default:
1229 goto unknown;
1230 }
1231 break;
1232 case 'G': /* CHA -- Move to <col> */
1233 case '`': /* XXX: HPA -- same? */
1234 DEFAULT(csiescseq.arg[0], 1);
1235 tmoveto(csiescseq.arg[0]-1, term.c.y);
1236 break;
1237 case 'H': /* CUP -- Move to <row> <col> */
1238 case 'f': /* XXX: HVP -- same? */
1239 DEFAULT(csiescseq.arg[0], 1);
1240 DEFAULT(csiescseq.arg[1], 1);
1241 tmoveto(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1242 break;
1243 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1244 DEFAULT(csiescseq.arg[0], 1);
1245 while (csiescseq.arg[0]--)
1246 tputtab();
1247 break;
1248 case 'J': /* ED -- Clear screen */
1249 sel.bx = -1;
1250 switch(csiescseq.arg[0]) {
1251 case 0: /* below */
1252 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1253 if(term.c.y < term.row-1)
1254 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1255 break;
1256 case 1: /* above */
1257 if(term.c.y > 1)
1258 tclearregion(0, 0, term.col-1, term.c.y-1);
1259 tclearregion(0, term.c.y, term.c.x, term.c.y);
1260 break;
1261 case 2: /* all */
1262 tclearregion(0, 0, term.col-1, term.row-1);
1263 break;
1264 default:
1265 goto unknown;
1266 }
1267 break;
1268 case 'K': /* EL -- Clear line */
1269 switch(csiescseq.arg[0]) {
1270 case 0: /* right */
1271 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1272 break;
1273 case 1: /* left */
1274 tclearregion(0, term.c.y, term.c.x, term.c.y);
1275 break;
1276 case 2: /* all */
1277 tclearregion(0, term.c.y, term.col-1, term.c.y);
1278 break;
1279 }
1280 break;
1281 case 'S': /* SU -- Scroll <n> line up */
1282 DEFAULT(csiescseq.arg[0], 1);
1283 tscrollup(term.top, csiescseq.arg[0]);
1284 break;
1285 case 'T': /* SD -- Scroll <n> line down */
1286 DEFAULT(csiescseq.arg[0], 1);
1287 tscrolldown(term.top, csiescseq.arg[0]);
1288 break;
1289 case 'L': /* IL -- Insert <n> blank lines */
1290 DEFAULT(csiescseq.arg[0], 1);
1291 tinsertblankline(csiescseq.arg[0]);
1292 break;
1293 case 'l': /* RM -- Reset Mode */
1294 if(csiescseq.priv) {
1295 switch(csiescseq.arg[0]) {
1296 case 1:
1297 term.mode &= ~MODE_APPKEYPAD;
1298 break;
1299 case 5: /* DECSCNM -- Remove reverse video */
1300 if(IS_SET(MODE_REVERSE)) {
1301 term.mode &= ~MODE_REVERSE;
1302 draw();
1303 }
1304 break;
1305 case 7:
1306 term.mode &= ~MODE_WRAP;
1307 break;
1308 case 12: /* att610 -- Stop blinking cursor (IGNORED) */
1309 break;
1310 case 20:
1311 term.mode &= ~MODE_CRLF;
1312 break;
1313 case 25:
1314 term.c.state |= CURSOR_HIDE;
1315 break;
1316 case 1000: /* disable X11 xterm mouse reporting */
1317 term.mode &= ~MODE_MOUSEBTN;
1318 break;
1319 case 1002:
1320 term.mode &= ~MODE_MOUSEMOTION;
1321 break;
1322 case 1049: /* = 1047 and 1048 */
1323 case 47:
1324 case 1047:
1325 if(IS_SET(MODE_ALTSCREEN)) {
1326 tclearregion(0, 0, term.col-1, term.row-1);
1327 tswapscreen();
1328 }
1329 if(csiescseq.arg[0] != 1049)
1330 break;
1331 case 1048:
1332 tcursor(CURSOR_LOAD);
1333 break;
1334 default:
1335 goto unknown;
1336 }
1337 } else {
1338 switch(csiescseq.arg[0]) {
1339 case 4:
1340 term.mode &= ~MODE_INSERT;
1341 break;
1342 default:
1343 goto unknown;
1344 }
1345 }
1346 break;
1347 case 'M': /* DL -- Delete <n> lines */
1348 DEFAULT(csiescseq.arg[0], 1);
1349 tdeleteline(csiescseq.arg[0]);
1350 break;
1351 case 'X': /* ECH -- Erase <n> char */
1352 DEFAULT(csiescseq.arg[0], 1);
1353 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
1354 break;
1355 case 'P': /* DCH -- Delete <n> char */
1356 DEFAULT(csiescseq.arg[0], 1);
1357 tdeletechar(csiescseq.arg[0]);
1358 break;
1359 /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
1360 case 'd': /* VPA -- Move to <row> */
1361 DEFAULT(csiescseq.arg[0], 1);
1362 tmoveto(term.c.x, csiescseq.arg[0]-1);
1363 break;
1364 case 'h': /* SM -- Set terminal mode */
1365 if(csiescseq.priv) {
1366 switch(csiescseq.arg[0]) {
1367 case 1:
1368 term.mode |= MODE_APPKEYPAD;
1369 break;
1370 case 5: /* DECSCNM -- Reverve video */
1371 if(!IS_SET(MODE_REVERSE)) {
1372 term.mode |= MODE_REVERSE;
1373 draw();
1374 }
1375 break;
1376 case 7:
1377 term.mode |= MODE_WRAP;
1378 break;
1379 case 20:
1380 term.mode |= MODE_CRLF;
1381 break;
1382 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1383 /* fallthrough for xterm cvvis = CSI [ ? 12 ; 25 h */
1384 if(csiescseq.narg > 1 && csiescseq.arg[1] != 25)
1385 break;
1386 case 25:
1387 term.c.state &= ~CURSOR_HIDE;
1388 break;
1389 case 1000: /* 1000,1002: enable xterm mouse report */
1390 term.mode |= MODE_MOUSEBTN;
1391 break;
1392 case 1002:
1393 term.mode |= MODE_MOUSEMOTION;
1394 break;
1395 case 1049: /* = 1047 and 1048 */
1396 case 47:
1397 case 1047:
1398 if(IS_SET(MODE_ALTSCREEN))
1399 tclearregion(0, 0, term.col-1, term.row-1);
1400 else
1401 tswapscreen();
1402 if(csiescseq.arg[0] != 1049)
1403 break;
1404 case 1048:
1405 tcursor(CURSOR_SAVE);
1406 break;
1407 default: goto unknown;
1408 }
1409 } else {
1410 switch(csiescseq.arg[0]) {
1411 case 4:
1412 term.mode |= MODE_INSERT;
1413 break;
1414 default: goto unknown;
1415 }
1416 };
1417 break;
1418 case 'm': /* SGR -- Terminal attribute (color) */
1419 tsetattr(csiescseq.arg, csiescseq.narg);
1420 break;
1421 case 'r': /* DECSTBM -- Set Scrolling Region */
1422 if(csiescseq.priv)
1423 goto unknown;
1424 else {
1425 DEFAULT(csiescseq.arg[0], 1);
1426 DEFAULT(csiescseq.arg[1], term.row);
1427 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1428 tmoveto(0, 0);
1429 }
1430 break;
1431 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1432 tcursor(CURSOR_SAVE);
1433 break;
1434 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1435 tcursor(CURSOR_LOAD);
1436 break;
1437 }
1438 }
1439
1440 void
1441 csidump(void) {
1442 int i;
1443 printf("ESC[");
1444 for(i = 0; i < csiescseq.len; i++) {
1445 uint c = csiescseq.buf[i] & 0xff;
1446 if(isprint(c)) putchar(c);
1447 else if(c == '\n') printf("(\\n)");
1448 else if(c == '\r') printf("(\\r)");
1449 else if(c == 0x1b) printf("(\\e)");
1450 else printf("(%02x)", c);
1451 }
1452 putchar('\n');
1453 }
1454
1455 void
1456 csireset(void) {
1457 memset(&csiescseq, 0, sizeof(csiescseq));
1458 }
1459
1460 void
1461 strhandle(void) {
1462 char *p;
1463
1464 p = strescseq.buf;
1465
1466 switch(strescseq.type) {
1467 case ']': /* OSC -- Operating System Command */
1468 switch(p[0]) {
1469 case '0':
1470 case '2':
1471 /*
1472 * TODO: Handle special chars in string, like umlauts.
1473 */
1474 if(p[1] == ';') {
1475 if(!strncmp(strescseq.buf, "settitle ", 9)) {
1476 XStoreName(xw.dpy, xw.win, strescseq.buf+11);
1477 } else {
1478 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1479 }
1480 }
1481 break;
1482 case ';':
1483 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1484 break;
1485 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1486 break;
1487 default:
1488 fprintf(stderr, "erresc: unknown str ");
1489 strdump();
1490 break;
1491 }
1492 break;
1493 case 'P': /* DSC -- Device Control String */
1494 case '_': /* APC -- Application Program Command */
1495 case '^': /* PM -- Privacy Message */
1496 default:
1497 fprintf(stderr, "erresc: unknown str ");
1498 strdump();
1499 /* die(""); */
1500 break;
1501 }
1502 }
1503
1504 void
1505 strparse(void) {
1506 /*
1507 * TODO: Implement parsing like for CSI when required.
1508 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1509 */
1510 return;
1511 }
1512
1513 void
1514 strdump(void) {
1515 int i;
1516 printf("ESC%c", strescseq.type);
1517 for(i = 0; i < strescseq.len; i++) {
1518 uint c = strescseq.buf[i] & 0xff;
1519 if(isprint(c)) putchar(c);
1520 else if(c == '\n') printf("(\\n)");
1521 else if(c == '\r') printf("(\\r)");
1522 else if(c == 0x1b) printf("(\\e)");
1523 else printf("(%02x)", c);
1524 }
1525 printf("ESC\\\n");
1526 }
1527
1528 void
1529 strreset(void) {
1530 memset(&strescseq, 0, sizeof(strescseq));
1531 }
1532
1533 void
1534 tputtab(void) {
1535 unsigned x;
1536
1537 for (x = term.c.x + 1; x < term.col && !term.tabs[x]; ++x)
1538 /* nothing */ ;
1539 tmoveto(x, term.c.y);
1540 }
1541
1542 void
1543 tputc(char *c) {
1544 char ascii = *c;
1545 if(term.esc & ESC_START) {
1546 if(term.esc & ESC_CSI) {
1547 csiescseq.buf[csiescseq.len++] = ascii;
1548 if(BETWEEN(ascii, 0x40, 0x7E) || csiescseq.len >= ESC_BUF_SIZ) {
1549 term.esc = 0;
1550 csiparse(), csihandle();
1551 }
1552 } else if(term.esc & ESC_STR) {
1553 switch(ascii) {
1554 case '\033':
1555 term.esc = ESC_START | ESC_STR_END;
1556 break;
1557 case '\a': /* backwards compatibility to xterm */
1558 term.esc = 0;
1559 strhandle();
1560 break;
1561 default:
1562 strescseq.buf[strescseq.len++] = ascii;
1563 if (strescseq.len+1 >= STR_BUF_SIZ) {
1564 term.esc = 0;
1565 strhandle();
1566 }
1567 }
1568 } else if(term.esc & ESC_STR_END) {
1569 term.esc = 0;
1570 if(ascii == '\\')
1571 strhandle();
1572 } else if(term.esc & ESC_ALTCHARSET) {
1573 switch(ascii) {
1574 case '0': /* Line drawing crap */
1575 term.c.attr.mode |= ATTR_GFX;
1576 break;
1577 case 'B': /* Back to regular text */
1578 term.c.attr.mode &= ~ATTR_GFX;
1579 break;
1580 default:
1581 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1582 }
1583 term.esc = 0;
1584 } else {
1585 switch(ascii) {
1586 case '[':
1587 term.esc |= ESC_CSI;
1588 break;
1589 case 'P': /* DCS -- Device Control String */
1590 case '_': /* APC -- Application Program Command */
1591 case '^': /* PM -- Privacy Message */
1592 case ']': /* OSC -- Operating System Command */
1593 strreset();
1594 strescseq.type = ascii;
1595 term.esc |= ESC_STR;
1596 break;
1597 case '(':
1598 term.esc |= ESC_ALTCHARSET;
1599 break;
1600 case 'D': /* IND -- Linefeed */
1601 if(term.c.y == term.bot)
1602 tscrollup(term.top, 1);
1603 else
1604 tmoveto(term.c.x, term.c.y+1);
1605 term.esc = 0;
1606 break;
1607 case 'E': /* NEL -- Next line */
1608 tnewline(1); /* always go to first col */
1609 term.esc = 0;
1610 break;
1611 case 'H': /* HTS -- Horizontal tab stop */
1612 term.tabs[term.c.x] = 1;
1613 term.esc = 0;
1614 break;
1615 case 'M': /* RI -- Reverse index */
1616 if(term.c.y == term.top)
1617 tscrolldown(term.top, 1);
1618 else
1619 tmoveto(term.c.x, term.c.y-1);
1620 term.esc = 0;
1621 break;
1622 case 'c': /* RIS -- Reset to inital state */
1623 treset();
1624 term.esc = 0;
1625 break;
1626 case '=': /* DECPAM -- Application keypad */
1627 term.mode |= MODE_APPKEYPAD;
1628 term.esc = 0;
1629 break;
1630 case '>': /* DECPNM -- Normal keypad */
1631 term.mode &= ~MODE_APPKEYPAD;
1632 term.esc = 0;
1633 break;
1634 case '7': /* DECSC -- Save Cursor */
1635 tcursor(CURSOR_SAVE);
1636 term.esc = 0;
1637 break;
1638 case '8': /* DECRC -- Restore Cursor */
1639 tcursor(CURSOR_LOAD);
1640 term.esc = 0;
1641 break;
1642 case '\\': /* ST -- Stop */
1643 term.esc = 0;
1644 break;
1645 default:
1646 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
1647 (uchar) ascii, isprint(ascii)?ascii:'.');
1648 term.esc = 0;
1649 }
1650 }
1651 } else {
1652 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
1653 sel.bx = -1;
1654 switch(ascii) {
1655 case '\t':
1656 tputtab();
1657 break;
1658 case '\b':
1659 tmoveto(term.c.x-1, term.c.y);
1660 break;
1661 case '\r':
1662 tmoveto(0, term.c.y);
1663 break;
1664 case '\f':
1665 case '\v':
1666 case '\n':
1667 /* go to first col if the mode is set */
1668 tnewline(IS_SET(MODE_CRLF));
1669 break;
1670 case '\a':
1671 if(!(xw.state & WIN_FOCUSED))
1672 xseturgency(1);
1673 break;
1674 case '\033':
1675 csireset();
1676 term.esc = ESC_START;
1677 break;
1678 default:
1679 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1680 tnewline(1); /* always go to first col */
1681 tsetchar(c);
1682 if(term.c.x+1 < term.col)
1683 tmoveto(term.c.x+1, term.c.y);
1684 else
1685 term.c.state |= CURSOR_WRAPNEXT;
1686 }
1687 }
1688 }
1689
1690 int
1691 tresize(int col, int row) {
1692 int i, x;
1693 int minrow = MIN(row, term.row);
1694 int mincol = MIN(col, term.col);
1695 int slide = term.c.y - row + 1;
1696
1697 if(col < 1 || row < 1)
1698 return 0;
1699
1700 /* free unneeded rows */
1701 i = 0;
1702 if(slide > 0) {
1703 /* slide screen to keep cursor where we expect it -
1704 * tscrollup would work here, but we can optimize to
1705 * memmove because we're freeing the earlier lines */
1706 for(/* i = 0 */; i < slide; i++) {
1707 free(term.line[i]);
1708 free(term.alt[i]);
1709 }
1710 memmove(term.line, term.line + slide, row * sizeof(Line));
1711 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1712 }
1713 for(i += row; i < term.row; i++) {
1714 free(term.line[i]);
1715 free(term.alt[i]);
1716 }
1717
1718 /* resize to new height */
1719 term.line = realloc(term.line, row * sizeof(Line));
1720 term.alt = realloc(term.alt, row * sizeof(Line));
1721 term.dirty = realloc(term.dirty, row * sizeof(*term.dirty));
1722 term.tabs = realloc(term.tabs, col * sizeof(*term.tabs));
1723
1724 /* resize each row to new width, zero-pad if needed */
1725 for(i = 0; i < minrow; i++) {
1726 term.dirty[i] = 1;
1727 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
1728 term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
1729 for(x = mincol; x < col; x++) {
1730 term.line[i][x].state = 0;
1731 term.alt[i][x].state = 0;
1732 }
1733 }
1734
1735 /* allocate any new rows */
1736 for(/* i == minrow */; i < row; i++) {
1737 term.dirty[i] = 1;
1738 term.line[i] = calloc(col, sizeof(Glyph));
1739 term.alt [i] = calloc(col, sizeof(Glyph));
1740 }
1741 if (col > term.col) {
1742 bool *bp = term.tabs + term.col;
1743
1744 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
1745 while (--bp > term.tabs && !*bp)
1746 /* nothing */ ;
1747 for (bp += TAB; bp < term.tabs + col; bp += TAB)
1748 *bp = 1;
1749 }
1750 /* update terminal size */
1751 term.col = col, term.row = row;
1752 /* make use of the LIMIT in tmoveto */
1753 tmoveto(term.c.x, term.c.y);
1754 /* reset scrolling region */
1755 tsetscroll(0, row-1);
1756
1757 return (slide > 0);
1758 }
1759
1760 void
1761 xresize(int col, int row) {
1762 xw.w = MAX(1, 2*BORDER + col * xw.cw);
1763 xw.h = MAX(1, 2*BORDER + row * xw.ch);
1764 }
1765
1766 void
1767 xloadcols(void) {
1768 int i, r, g, b;
1769 XColor color;
1770 ulong white = WhitePixel(xw.dpy, xw.scr);
1771
1772 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
1773 for(i = 0; i < LEN(colorname); i++) {
1774 if(!colorname[i])
1775 continue;
1776 if(!XAllocNamedColor(xw.dpy, xw.cmap, colorname[i], &color, &color)) {
1777 dc.col[i] = white;
1778 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1779 } else
1780 dc.col[i] = color.pixel;
1781 }
1782
1783 /* load colors [16-255] ; same colors as xterm */
1784 for(i = 16, r = 0; r < 6; r++)
1785 for(g = 0; g < 6; g++)
1786 for(b = 0; b < 6; b++) {
1787 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1788 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1789 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1790 if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
1791 dc.col[i] = white;
1792 fprintf(stderr, "Could not allocate color %d\n", i);
1793 } else
1794 dc.col[i] = color.pixel;
1795 i++;
1796 }
1797
1798 for(r = 0; r < 24; r++, i++) {
1799 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1800 if (!XAllocColor(xw.dpy, xw.cmap, &color)) {
1801 dc.col[i] = white;
1802 fprintf(stderr, "Could not allocate color %d\n", i);
1803 } else
1804 dc.col[i] = color.pixel;
1805 }
1806 }
1807
1808 void
1809 xclear(int x1, int y1, int x2, int y2) {
1810 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
1811 XFillRectangle(xw.dpy, xw.buf, dc.gc,
1812 BORDER + x1 * xw.cw, BORDER + y1 * xw.ch,
1813 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1814 }
1815
1816 void
1817 xhints(void) {
1818 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
1819 XWMHints wm = {.flags = InputHint, .input = 1};
1820 XSizeHints size = {
1821 .flags = PSize | PResizeInc | PBaseSize,
1822 .height = xw.h,
1823 .width = xw.w,
1824 .height_inc = xw.ch,
1825 .width_inc = xw.cw,
1826 .base_height = 2*BORDER,
1827 .base_width = 2*BORDER,
1828 };
1829 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1830 }
1831
1832 XFontSet
1833 xinitfont(char *fontstr) {
1834 XFontSet set;
1835 char *def, **missing;
1836 int n;
1837
1838 missing = NULL;
1839 set = XCreateFontSet(xw.dpy, fontstr, &missing, &n, &def);
1840 if(missing) {
1841 while(n--)
1842 fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
1843 XFreeStringList(missing);
1844 }
1845 return set;
1846 }
1847
1848 void
1849 xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing) {
1850 XFontStruct **xfonts;
1851 char **font_names;
1852 int i, n;
1853
1854 *ascent = *descent = *lbearing = *rbearing = 0;
1855 n = XFontsOfFontSet(set, &xfonts, &font_names);
1856 for(i = 0; i < n; i++) {
1857 *ascent = MAX(*ascent, (*xfonts)->ascent);
1858 *descent = MAX(*descent, (*xfonts)->descent);
1859 *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
1860 *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
1861 xfonts++;
1862 }
1863 }
1864
1865 void
1866 initfonts(char *fontstr, char *bfontstr) {
1867 if((dc.font.set = xinitfont(fontstr)) == NULL ||
1868 (dc.bfont.set = xinitfont(bfontstr)) == NULL)
1869 die("Can't load font %s\n", dc.font.set ? BOLDFONT : FONT);
1870 xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
1871 &dc.font.lbearing, &dc.font.rbearing);
1872 xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
1873 &dc.bfont.lbearing, &dc.bfont.rbearing);
1874 }
1875
1876 void
1877 xinit(void) {
1878 XSetWindowAttributes attrs;
1879 Cursor cursor;
1880 Window parent;
1881
1882 if(!(xw.dpy = XOpenDisplay(NULL)))
1883 die("Can't open display\n");
1884 xw.scr = XDefaultScreen(xw.dpy);
1885
1886 /* font */
1887 initfonts(FONT, BOLDFONT);
1888
1889 /* XXX: Assuming same size for bold font */
1890 xw.cw = dc.font.rbearing - dc.font.lbearing;
1891 xw.ch = dc.font.ascent + dc.font.descent;
1892
1893 /* colors */
1894 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1895 xloadcols();
1896
1897 /* window - default size */
1898 xw.h = 2*BORDER + term.row * xw.ch;
1899 xw.w = 2*BORDER + term.col * xw.cw;
1900
1901 attrs.background_pixel = dc.col[DefaultBG];
1902 attrs.border_pixel = dc.col[DefaultBG];
1903 attrs.bit_gravity = NorthWestGravity;
1904 attrs.event_mask = FocusChangeMask | KeyPressMask
1905 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1906 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask
1907 | EnterWindowMask | LeaveWindowMask;
1908 attrs.colormap = xw.cmap;
1909
1910 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
1911 xw.win = XCreateWindow(xw.dpy, parent, 0, 0,
1912 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
1913 XDefaultVisual(xw.dpy, xw.scr),
1914 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
1915 | CWColormap,
1916 &attrs);
1917 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
1918
1919
1920 /* input methods */
1921 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
1922 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
1923 | XIMStatusNothing, XNClientWindow, xw.win,
1924 XNFocusWindow, xw.win, NULL);
1925 /* gc */
1926 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
1927
1928 /* white cursor, black outline */
1929 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
1930 XDefineCursor(xw.dpy, xw.win, cursor);
1931 XRecolorCursor(xw.dpy, cursor,
1932 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
1933 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
1934
1935 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
1936
1937 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
1938 XMapWindow(xw.dpy, xw.win);
1939 xhints();
1940 XSync(xw.dpy, 0);
1941 }
1942
1943 void
1944 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
1945 int fg = base.fg, bg = base.bg, temp;
1946 int winx = BORDER+x*xw.cw, winy = BORDER+y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
1947 XFontSet fontset = dc.font.set;
1948 int i;
1949
1950 /* only switch default fg/bg if term is in RV mode */
1951 if(IS_SET(MODE_REVERSE)) {
1952 if(fg == DefaultFG)
1953 fg = DefaultBG;
1954 if(bg == DefaultBG)
1955 bg = DefaultFG;
1956 }
1957
1958 if(base.mode & ATTR_REVERSE)
1959 temp = fg, fg = bg, bg = temp;
1960
1961 if(base.mode & ATTR_BOLD) {
1962 fg += 8;
1963 fontset = dc.bfont.set;
1964 }
1965
1966 XSetBackground(xw.dpy, dc.gc, dc.col[bg]);
1967 XSetForeground(xw.dpy, dc.gc, dc.col[fg]);
1968
1969 if(base.mode & ATTR_GFX) {
1970 for(i = 0; i < bytelen; i++) {
1971 char c = gfx[(uint)s[i] % 256];
1972 if(c)
1973 s[i] = c;
1974 else if(s[i] > 0x5f)
1975 s[i] -= 0x5f;
1976 }
1977 }
1978
1979 XmbDrawImageString(xw.dpy, xw.buf, fontset, dc.gc, winx, winy, s, bytelen);
1980
1981 if(base.mode & ATTR_UNDERLINE)
1982 XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1983 }
1984
1985 /* copy buffer pixmap to screen pixmap */
1986 void
1987 xcopy() {
1988 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
1989 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
1990
1991 }
1992
1993 void
1994 xdrawcursor(void) {
1995 static int oldx = 0;
1996 static int oldy = 0;
1997 int sl;
1998 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
1999
2000 LIMIT(oldx, 0, term.col-1);
2001 LIMIT(oldy, 0, term.row-1);
2002
2003 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2004 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2005
2006 /* remove the old cursor */
2007 if(term.line[oldy][oldx].state & GLYPH_SET) {
2008 sl = utf8size(term.line[oldy][oldx].c);
2009 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
2010 } else
2011 xclear(oldx, oldy, oldx, oldy);
2012
2013 xcopy(oldx, oldy, 1, 1);
2014
2015 /* draw the new one */
2016 if(!(term.c.state & CURSOR_HIDE)) {
2017 if(!(xw.state & WIN_FOCUSED))
2018 g.bg = DefaultUCS;
2019
2020 if(IS_SET(MODE_REVERSE))
2021 g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
2022
2023 sl = utf8size(g.c);
2024 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2025 oldx = term.c.x, oldy = term.c.y;
2026 }
2027
2028 xcopy(term.c.x, term.c.y, 1, 1);
2029 }
2030
2031 void
2032 draw() {
2033 drawregion(0, 0, term.col, term.row);
2034 xcopy();
2035 gettimeofday(&xw.lastdraw, NULL);
2036 }
2037
2038 void
2039 drawregion(int x1, int y1, int x2, int y2) {
2040 int ic, ib, x, y, ox, sl;
2041 Glyph base, new;
2042 char buf[DRAW_BUF_SIZ];
2043
2044 if(!(xw.state & WIN_VISIBLE))
2045 return;
2046
2047 for(y = y1; y < y2; y++) {
2048 if(!term.dirty[y])
2049 continue;
2050 xclear(0, y, term.col, y);
2051 term.dirty[y] = 0;
2052 base = term.line[y][0];
2053 ic = ib = ox = 0;
2054 for(x = x1; x < x2; x++) {
2055 new = term.line[y][x];
2056 if(sel.bx != -1 && *(new.c) && selected(x, y))
2057 new.mode ^= ATTR_REVERSE;
2058 if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
2059 ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2060 xdraws(buf, base, ox, y, ic, ib);
2061 ic = ib = 0;
2062 }
2063 if(new.state & GLYPH_SET) {
2064 if(ib == 0) {
2065 ox = x;
2066 base = new;
2067 }
2068 sl = utf8size(new.c);
2069 memcpy(buf+ib, new.c, sl);
2070 ib += sl;
2071 ++ic;
2072 }
2073 }
2074 if(ib > 0)
2075 xdraws(buf, base, ox, y, ic, ib);
2076 }
2077 xdrawcursor();
2078 }
2079
2080 void
2081 expose(XEvent *ev) {
2082 XExposeEvent *e = &ev->xexpose;
2083 if(xw.state & WIN_REDRAW) {
2084 if(!e->count)
2085 xw.state &= ~WIN_REDRAW;
2086 }
2087 xcopy();
2088 }
2089
2090 void
2091 visibility(XEvent *ev) {
2092 XVisibilityEvent *e = &ev->xvisibility;
2093 if(e->state == VisibilityFullyObscured)
2094 xw.state &= ~WIN_VISIBLE;
2095 else if(!(xw.state & WIN_VISIBLE))
2096 /* need a full redraw for next Expose, not just a buf copy */
2097 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2098 }
2099
2100 void
2101 unmap(XEvent *ev) {
2102 xw.state &= ~WIN_VISIBLE;
2103 }
2104
2105 void
2106 xseturgency(int add) {
2107 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2108 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2109 XSetWMHints(xw.dpy, xw.win, h);
2110 XFree(h);
2111 }
2112
2113 void
2114 focus(XEvent *ev) {
2115 if(ev->type == FocusIn) {
2116 xw.state |= WIN_FOCUSED;
2117 xseturgency(0);
2118 } else
2119 xw.state &= ~WIN_FOCUSED;
2120 draw();
2121 }
2122
2123 char*
2124 kmap(KeySym k, uint state) {
2125 int i;
2126 state &= ~Mod2Mask;
2127 for(i = 0; i < LEN(key); i++) {
2128 uint mask = key[i].mask;
2129 if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
2130 return (char*)key[i].s;
2131 }
2132 return NULL;
2133 }
2134
2135 void
2136 kpress(XEvent *ev) {
2137 XKeyEvent *e = &ev->xkey;
2138 KeySym ksym;
2139 char buf[32];
2140 char *customkey;
2141 int len;
2142 int meta;
2143 int shift;
2144 Status status;
2145
2146 meta = e->state & Mod1Mask;
2147 shift = e->state & ShiftMask;
2148 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
2149
2150 /* 1. custom keys from config.h */
2151 if((customkey = kmap(ksym, e->state)))
2152 ttywrite(customkey, strlen(customkey));
2153 /* 2. hardcoded (overrides X lookup) */
2154 else
2155 switch(ksym) {
2156 case XK_Up:
2157 case XK_Down:
2158 case XK_Left:
2159 case XK_Right:
2160 /* XXX: shift up/down doesn't work */
2161 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
2162 ttywrite(buf, 3);
2163 break;
2164 case XK_Insert:
2165 if(shift)
2166 selpaste();
2167 break;
2168 case XK_Return:
2169 if(IS_SET(MODE_CRLF))
2170 ttywrite("\r\n", 2);
2171 else
2172 ttywrite("\r", 1);
2173 break;
2174 /* 3. X lookup */
2175 default:
2176 if(len > 0) {
2177 if(meta && len == 1)
2178 ttywrite("\033", 1);
2179 ttywrite(buf, len);
2180 }
2181 break;
2182 }
2183 }
2184
2185 void
2186 cmessage(XEvent *e) {
2187 /* See xembed specs
2188 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2189 if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2190 if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2191 xw.state |= WIN_FOCUSED;
2192 xseturgency(0);
2193 } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2194 xw.state &= ~WIN_FOCUSED;
2195 }
2196 draw();
2197 }
2198 }
2199
2200 void
2201 resize(XEvent *e) {
2202 int col, row;
2203
2204 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2205 return;
2206
2207 xw.w = e->xconfigure.width;
2208 xw.h = e->xconfigure.height;
2209 col = (xw.w - 2*BORDER) / xw.cw;
2210 row = (xw.h - 2*BORDER) / xw.ch;
2211 if(col == term.col && row == term.row)
2212 return;
2213 if(tresize(col, row))
2214 draw();
2215 ttyresize(col, row);
2216 xresize(col, row);
2217 }
2218
2219 bool
2220 last_draw_too_old(void) {
2221 struct timeval now;
2222 gettimeofday(&now, NULL);
2223 return TIMEDIFF(now, xw.lastdraw) >= DRAW_TIMEOUT/1000;
2224 }
2225
2226 void
2227 run(void) {
2228 XEvent ev;
2229 fd_set rfd;
2230 int xfd = XConnectionNumber(xw.dpy);
2231 struct timeval timeout = {0};
2232 bool stuff_to_print = 0;
2233
2234 for(;;) {
2235 FD_ZERO(&rfd);
2236 FD_SET(cmdfd, &rfd);
2237 FD_SET(xfd, &rfd);
2238 timeout.tv_sec = 0;
2239 timeout.tv_usec = SELECT_TIMEOUT;
2240 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, &timeout) < 0) {
2241 if(errno == EINTR)
2242 continue;
2243 die("select failed: %s\n", SERRNO);
2244 }
2245 if(FD_ISSET(cmdfd, &rfd)) {
2246 ttyread();
2247 stuff_to_print = 1;
2248 }
2249
2250 if(stuff_to_print && last_draw_too_old()) {
2251 stuff_to_print = 0;
2252 draw();
2253 }
2254
2255 while(XPending(xw.dpy)) {
2256 XNextEvent(xw.dpy, &ev);
2257 if(XFilterEvent(&ev, xw.win))
2258 continue;
2259 if(handler[ev.type])
2260 (handler[ev.type])(&ev);
2261 }
2262 }
2263 }
2264
2265 int
2266 main(int argc, char *argv[]) {
2267 int i;
2268
2269 for(i = 1; i < argc; i++) {
2270 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2271 case 't':
2272 if(++i < argc) opt_title = argv[i];
2273 break;
2274 case 'c':
2275 if(++i < argc) opt_class = argv[i];
2276 break;
2277 case 'w':
2278 if(++i < argc) opt_embed = argv[i];
2279 break;
2280 case 'e':
2281 /* eat every remaining arguments */
2282 if(++i < argc) opt_cmd = &argv[i];
2283 goto run;
2284 case 'v':
2285 default:
2286 die(USAGE);
2287 }
2288 }
2289
2290 run:
2291 setlocale(LC_CTYPE, "");
2292 tnew(80, 24);
2293 ttynew();
2294 xinit();
2295 selinit();
2296 run();
2297 return 0;
2298 }