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fde0493f6e39c888faf8ed95d63741be6422376e
[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] [-f file] [-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 FILE *fileio;
346 static char **opt_cmd = NULL;
347 static char *opt_io = NULL;
348 static char *opt_title = NULL;
349 static char *opt_embed = NULL;
350 static char *opt_class = NULL;
351
352 int
353 utf8decode(char *s, long *u) {
354 uchar c;
355 int i, n, rtn;
356
357 rtn = 1;
358 c = *s;
359 if(~c & B7) { /* 0xxxxxxx */
360 *u = c;
361 return rtn;
362 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
363 *u = c&(B4|B3|B2|B1|B0);
364 n = 1;
365 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
366 *u = c&(B3|B2|B1|B0);
367 n = 2;
368 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
369 *u = c & (B2|B1|B0);
370 n = 3;
371 } else
372 goto invalid;
373 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
374 c = *s;
375 if((c & (B7|B6)) != B7) /* 10xxxxxx */
376 goto invalid;
377 *u <<= 6;
378 *u |= c & (B5|B4|B3|B2|B1|B0);
379 }
380 if((n == 1 && *u < 0x80) ||
381 (n == 2 && *u < 0x800) ||
382 (n == 3 && *u < 0x10000) ||
383 (*u >= 0xD800 && *u <= 0xDFFF))
384 goto invalid;
385 return rtn;
386 invalid:
387 *u = 0xFFFD;
388 return rtn;
389 }
390
391 int
392 utf8encode(long *u, char *s) {
393 uchar *sp;
394 ulong uc;
395 int i, n;
396
397 sp = (uchar*) s;
398 uc = *u;
399 if(uc < 0x80) {
400 *sp = uc; /* 0xxxxxxx */
401 return 1;
402 } else if(*u < 0x800) {
403 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
404 n = 1;
405 } else if(uc < 0x10000) {
406 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
407 n = 2;
408 } else if(uc <= 0x10FFFF) {
409 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
410 n = 3;
411 } else {
412 goto invalid;
413 }
414 for(i=n,++sp; i>0; --i,++sp)
415 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
416 return n+1;
417 invalid:
418 /* U+FFFD */
419 *s++ = '\xEF';
420 *s++ = '\xBF';
421 *s = '\xBD';
422 return 3;
423 }
424
425 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
426 UTF-8 otherwise return 0 */
427 int
428 isfullutf8(char *s, int b) {
429 uchar *c1, *c2, *c3;
430
431 c1 = (uchar *) s;
432 c2 = (uchar *) ++s;
433 c3 = (uchar *) ++s;
434 if(b < 1)
435 return 0;
436 else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
437 return 0;
438 else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
439 ((b == 1) ||
440 ((b == 2) && (*c2&(B7|B6)) == B7)))
441 return 0;
442 else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
443 ((b == 1) ||
444 ((b == 2) && (*c2&(B7|B6)) == B7) ||
445 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7)))
446 return 0;
447 else
448 return 1;
449 }
450
451 int
452 utf8size(char *s) {
453 uchar c = *s;
454
455 if(~c&B7)
456 return 1;
457 else if((c&(B7|B6|B5)) == (B7|B6))
458 return 2;
459 else if((c&(B7|B6|B5|B4)) == (B7|B6|B5))
460 return 3;
461 else
462 return 4;
463 }
464
465 void
466 selinit(void) {
467 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
468 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
469 sel.mode = 0;
470 sel.bx = -1;
471 sel.clip = NULL;
472 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
473 if(sel.xtarget == None)
474 sel.xtarget = XA_STRING;
475 }
476
477 static inline bool
478 selected(int x, int y) {
479 if(sel.ey == y && sel.by == y) {
480 int bx = MIN(sel.bx, sel.ex);
481 int ex = MAX(sel.bx, sel.ex);
482 return BETWEEN(x, bx, ex);
483 }
484 return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
485 || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
486 }
487
488 void
489 getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
490 if(b)
491 *b = e->xbutton.button;
492
493 *x = X2COL(e->xbutton.x);
494 *y = Y2ROW(e->xbutton.y);
495 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
496 sel.b.y = MIN(sel.by, sel.ey);
497 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
498 sel.e.y = MAX(sel.by, sel.ey);
499 }
500
501 void
502 mousereport(XEvent *e) {
503 int x = X2COL(e->xbutton.x);
504 int y = Y2ROW(e->xbutton.y);
505 int button = e->xbutton.button;
506 int state = e->xbutton.state;
507 char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
508 static int ob, ox, oy;
509
510 /* from urxvt */
511 if(e->xbutton.type == MotionNotify) {
512 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
513 return;
514 button = ob + 32;
515 ox = x, oy = y;
516 } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
517 button = 3;
518 } else {
519 button -= Button1;
520 if(button >= 3)
521 button += 64 - 3;
522 if(e->xbutton.type == ButtonPress) {
523 ob = button;
524 ox = x, oy = y;
525 }
526 }
527
528 buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
529 + (state & Mod4Mask ? 8 : 0)
530 + (state & ControlMask ? 16 : 0);
531
532 ttywrite(buf, sizeof(buf));
533 }
534
535 void
536 bpress(XEvent *e) {
537 if(IS_SET(MODE_MOUSE))
538 mousereport(e);
539 else if(e->xbutton.button == Button1) {
540 if(sel.bx != -1)
541 tsetdirt(sel.b.y, sel.e.y);
542 sel.mode = 1;
543 sel.ex = sel.bx = X2COL(e->xbutton.x);
544 sel.ey = sel.by = Y2ROW(e->xbutton.y);
545 }
546 }
547
548 void
549 selcopy(void) {
550 char *str, *ptr;
551 int x, y, bufsize, is_selected = 0;
552
553 if(sel.bx == -1)
554 str = NULL;
555
556 else {
557 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
558 ptr = str = malloc(bufsize);
559
560 /* append every set & selected glyph to the selection */
561 for(y = 0; y < term.row; y++) {
562 for(x = 0; x < term.col; x++) {
563 is_selected = selected(x, y);
564 if((term.line[y][x].state & GLYPH_SET) && is_selected) {
565 int size = utf8size(term.line[y][x].c);
566 memcpy(ptr, term.line[y][x].c, size);
567 ptr += size;
568 }
569 }
570
571 /* \n at the end of every selected line except for the last one */
572 if(is_selected && y < sel.e.y)
573 *ptr++ = '\n';
574 }
575 *ptr = 0;
576 }
577 xsetsel(str);
578 }
579
580 void
581 selnotify(XEvent *e) {
582 ulong nitems, ofs, rem;
583 int format;
584 uchar *data;
585 Atom type;
586
587 ofs = 0;
588 do {
589 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
590 False, AnyPropertyType, &type, &format,
591 &nitems, &rem, &data)) {
592 fprintf(stderr, "Clipboard allocation failed\n");
593 return;
594 }
595 ttywrite((const char *) data, nitems * format / 8);
596 XFree(data);
597 /* number of 32-bit chunks returned */
598 ofs += nitems * format / 32;
599 } while(rem > 0);
600 }
601
602 void
603 selpaste() {
604 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY, xw.win, CurrentTime);
605 }
606
607 void
608 selrequest(XEvent *e) {
609 XSelectionRequestEvent *xsre;
610 XSelectionEvent xev;
611 Atom xa_targets;
612
613 xsre = (XSelectionRequestEvent *) e;
614 xev.type = SelectionNotify;
615 xev.requestor = xsre->requestor;
616 xev.selection = xsre->selection;
617 xev.target = xsre->target;
618 xev.time = xsre->time;
619 /* reject */
620 xev.property = None;
621
622 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
623 if(xsre->target == xa_targets) {
624 /* respond with the supported type */
625 Atom string = sel.xtarget;
626 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
627 XA_ATOM, 32, PropModeReplace,
628 (uchar *) &string, 1);
629 xev.property = xsre->property;
630 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
631 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
632 xsre->target, 8, PropModeReplace,
633 (uchar *) sel.clip, strlen(sel.clip));
634 xev.property = xsre->property;
635 }
636
637 /* all done, send a notification to the listener */
638 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
639 fprintf(stderr, "Error sending SelectionNotify event\n");
640 }
641
642 void
643 xsetsel(char *str) {
644 /* register the selection for both the clipboard and the primary */
645 Atom clipboard;
646
647 free(sel.clip);
648 sel.clip = str;
649
650 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
651
652 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
653 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
654
655 XFlush(xw.dpy);
656 }
657
658 void
659 brelease(XEvent *e) {
660 if(IS_SET(MODE_MOUSE)) {
661 mousereport(e);
662 return;
663 }
664 if(e->xbutton.button == Button2)
665 selpaste();
666 else if(e->xbutton.button == Button1) {
667 sel.mode = 0;
668 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
669 term.dirty[sel.ey] = 1;
670 if(sel.bx == sel.ex && sel.by == sel.ey) {
671 struct timeval now;
672 sel.bx = -1;
673 gettimeofday(&now, NULL);
674
675 if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
676 /* triple click on the line */
677 sel.b.x = sel.bx = 0;
678 sel.e.x = sel.ex = term.col;
679 sel.b.y = sel.e.y = sel.ey;
680 selcopy();
681 } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
682 /* double click to select word */
683 sel.bx = sel.ex;
684 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
685 term.line[sel.ey][sel.bx-1].c[0] != ' ') sel.bx--;
686 sel.b.x = sel.bx;
687 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
688 term.line[sel.ey][sel.ex+1].c[0] != ' ') sel.ex++;
689 sel.e.x = sel.ex;
690 sel.b.y = sel.e.y = sel.ey;
691 selcopy();
692 }
693 } else
694 selcopy();
695 }
696 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
697 gettimeofday(&sel.tclick1, NULL);
698 draw();
699 }
700
701 void
702 bmotion(XEvent *e) {
703 if(IS_SET(MODE_MOUSE)) {
704 mousereport(e);
705 return;
706 }
707 if(sel.mode) {
708 int oldey = sel.ey, oldex = sel.ex;
709 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
710
711 if(oldey != sel.ey || oldex != sel.ex) {
712 int starty = MIN(oldey, sel.ey);
713 int endy = MAX(oldey, sel.ey);
714 tsetdirt(starty, endy);
715 draw();
716 }
717 }
718 }
719
720 void
721 die(const char *errstr, ...) {
722 va_list ap;
723
724 va_start(ap, errstr);
725 vfprintf(stderr, errstr, ap);
726 va_end(ap);
727 exit(EXIT_FAILURE);
728 }
729
730 void
731 execsh(void) {
732 char **args;
733 char *envshell = getenv("SHELL");
734
735 DEFAULT(envshell, SHELL);
736 putenv("TERM="TNAME);
737 args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
738 execvp(args[0], args);
739 exit(EXIT_FAILURE);
740 }
741
742 void
743 sigchld(int a) {
744 int stat = 0;
745 if(waitpid(pid, &stat, 0) < 0)
746 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
747 if(WIFEXITED(stat))
748 exit(WEXITSTATUS(stat));
749 else
750 exit(EXIT_FAILURE);
751 }
752
753 void
754 ttynew(void) {
755 int m, s;
756
757 /* seems to work fine on linux, openbsd and freebsd */
758 struct winsize w = {term.row, term.col, 0, 0};
759 if(openpty(&m, &s, NULL, NULL, &w) < 0)
760 die("openpty failed: %s\n", SERRNO);
761
762 switch(pid = fork()) {
763 case -1:
764 die("fork failed\n");
765 break;
766 case 0:
767 setsid(); /* create a new process group */
768 dup2(s, STDIN_FILENO);
769 dup2(s, STDOUT_FILENO);
770 dup2(s, STDERR_FILENO);
771 if(ioctl(s, TIOCSCTTY, NULL) < 0)
772 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
773 close(s);
774 close(m);
775 execsh();
776 break;
777 default:
778 close(s);
779 cmdfd = m;
780 signal(SIGCHLD, sigchld);
781 if (opt_io && !(fileio = fopen(opt_io, "w"))) {
782 fprintf(stderr, "Error opening %s:%s",
783 opt_io, strerror(errno));
784 }
785 }
786 }
787
788 void
789 dump(char c) {
790 static int col;
791 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
792 if(++col % 10 == 0)
793 fprintf(stderr, "\n");
794 }
795
796 void
797 ttyread(void) {
798 static char buf[BUFSIZ];
799 static int buflen = 0;
800 char *ptr;
801 char s[UTF_SIZ];
802 int charsize; /* size of utf8 char in bytes */
803 long utf8c;
804 int ret;
805
806 /* append read bytes to unprocessed bytes */
807 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
808 die("Couldn't read from shell: %s\n", SERRNO);
809
810 /* process every complete utf8 char */
811 buflen += ret;
812 ptr = buf;
813 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
814 charsize = utf8decode(ptr, &utf8c);
815 utf8encode(&utf8c, s);
816 tputc(s);
817 ptr += charsize;
818 buflen -= charsize;
819 }
820
821 /* keep any uncomplete utf8 char for the next call */
822 memmove(buf, ptr, buflen);
823 }
824
825 void
826 ttywrite(const char *s, size_t n) {
827 if(write(cmdfd, s, n) == -1)
828 die("write error on tty: %s\n", SERRNO);
829 }
830
831 void
832 ttyresize(int x, int y) {
833 struct winsize w;
834
835 w.ws_row = term.row;
836 w.ws_col = term.col;
837 w.ws_xpixel = w.ws_ypixel = 0;
838 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
839 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
840 }
841
842 void
843 tsetdirt(int top, int bot)
844 {
845 int i;
846
847 LIMIT(top, 0, term.row-1);
848 LIMIT(bot, 0, term.row-1);
849
850 for(i = top; i <= bot; i++)
851 term.dirty[i] = 1;
852 }
853
854 void
855 tfulldirt(void)
856 {
857 tsetdirt(0, term.row-1);
858 }
859
860 void
861 tcursor(int mode) {
862 static TCursor c;
863
864 if(mode == CURSOR_SAVE)
865 c = term.c;
866 else if(mode == CURSOR_LOAD)
867 term.c = c, tmoveto(c.x, c.y);
868 }
869
870 void
871 treset(void) {
872 unsigned i;
873 term.c = (TCursor){{
874 .mode = ATTR_NULL,
875 .fg = DefaultFG,
876 .bg = DefaultBG
877 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
878
879 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
880 for (i = TAB; i < term.col; i += TAB)
881 term.tabs[i] = 1;
882 term.top = 0, term.bot = term.row - 1;
883 term.mode = MODE_WRAP;
884 tclearregion(0, 0, term.col-1, term.row-1);
885 }
886
887 void
888 tnew(int col, int row) {
889 /* set screen size */
890 term.row = row, term.col = col;
891 term.line = malloc(term.row * sizeof(Line));
892 term.alt = malloc(term.row * sizeof(Line));
893 term.dirty = malloc(term.row * sizeof(*term.dirty));
894 term.tabs = malloc(term.col * sizeof(*term.tabs));
895
896 for(row = 0; row < term.row; row++) {
897 term.line[row] = malloc(term.col * sizeof(Glyph));
898 term.alt [row] = malloc(term.col * sizeof(Glyph));
899 term.dirty[row] = 0;
900 }
901 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
902 /* setup screen */
903 treset();
904 }
905
906 void
907 tswapscreen(void) {
908 Line* tmp = term.line;
909 term.line = term.alt;
910 term.alt = tmp;
911 term.mode ^= MODE_ALTSCREEN;
912 tfulldirt();
913 }
914
915 void
916 tscrolldown(int orig, int n) {
917 int i;
918 Line temp;
919
920 LIMIT(n, 0, term.bot-orig+1);
921
922 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
923
924 for(i = term.bot; i >= orig+n; i--) {
925 temp = term.line[i];
926 term.line[i] = term.line[i-n];
927 term.line[i-n] = temp;
928
929 term.dirty[i] = 1;
930 term.dirty[i-n] = 1;
931 }
932
933 selscroll(orig, n);
934 }
935
936 void
937 tscrollup(int orig, int n) {
938 int i;
939 Line temp;
940 LIMIT(n, 0, term.bot-orig+1);
941
942 tclearregion(0, orig, term.col-1, orig+n-1);
943
944 for(i = orig; i <= term.bot-n; i++) {
945 temp = term.line[i];
946 term.line[i] = term.line[i+n];
947 term.line[i+n] = temp;
948
949 term.dirty[i] = 1;
950 term.dirty[i+n] = 1;
951 }
952
953 selscroll(orig, -n);
954 }
955
956 void
957 selscroll(int orig, int n) {
958 if(sel.bx == -1)
959 return;
960
961 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
962 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
963 sel.bx = -1;
964 return;
965 }
966 if(sel.by < term.top) {
967 sel.by = term.top;
968 sel.bx = 0;
969 }
970 if(sel.ey > term.bot) {
971 sel.ey = term.bot;
972 sel.ex = term.col;
973 }
974 sel.b.y = sel.by, sel.b.x = sel.bx;
975 sel.e.y = sel.ey, sel.e.x = sel.ex;
976 }
977 }
978
979 void
980 tnewline(int first_col) {
981 int y = term.c.y;
982 if(y == term.bot)
983 tscrollup(term.top, 1);
984 else
985 y++;
986 tmoveto(first_col ? 0 : term.c.x, y);
987 }
988
989 void
990 csiparse(void) {
991 /* int noarg = 1; */
992 char *p = csiescseq.buf;
993
994 csiescseq.narg = 0;
995 if(*p == '?')
996 csiescseq.priv = 1, p++;
997
998 while(p < csiescseq.buf+csiescseq.len) {
999 while(isdigit(*p)) {
1000 csiescseq.arg[csiescseq.narg] *= 10;
1001 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1002 }
1003 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ)
1004 csiescseq.narg++, p++;
1005 else {
1006 csiescseq.mode = *p;
1007 csiescseq.narg++;
1008 return;
1009 }
1010 }
1011 }
1012
1013 void
1014 tmoveto(int x, int y) {
1015 LIMIT(x, 0, term.col-1);
1016 LIMIT(y, 0, term.row-1);
1017 term.c.state &= ~CURSOR_WRAPNEXT;
1018 term.c.x = x;
1019 term.c.y = y;
1020 }
1021
1022 void
1023 tsetchar(char *c) {
1024 term.dirty[term.c.y] = 1;
1025 term.line[term.c.y][term.c.x] = term.c.attr;
1026 memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
1027 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
1028 }
1029
1030 void
1031 tclearregion(int x1, int y1, int x2, int y2) {
1032 int x, y, temp;
1033
1034 if(x1 > x2)
1035 temp = x1, x1 = x2, x2 = temp;
1036 if(y1 > y2)
1037 temp = y1, y1 = y2, y2 = temp;
1038
1039 LIMIT(x1, 0, term.col-1);
1040 LIMIT(x2, 0, term.col-1);
1041 LIMIT(y1, 0, term.row-1);
1042 LIMIT(y2, 0, term.row-1);
1043
1044 for(y = y1; y <= y2; y++) {
1045 term.dirty[y] = 1;
1046 for(x = x1; x <= x2; x++)
1047 term.line[y][x].state = 0;
1048 }
1049 }
1050
1051 void
1052 tdeletechar(int n) {
1053 int src = term.c.x + n;
1054 int dst = term.c.x;
1055 int size = term.col - src;
1056
1057 term.dirty[term.c.y] = 1;
1058
1059 if(src >= term.col) {
1060 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1061 return;
1062 }
1063 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1064 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1065 }
1066
1067 void
1068 tinsertblank(int n) {
1069 int src = term.c.x;
1070 int dst = src + n;
1071 int size = term.col - dst;
1072
1073 term.dirty[term.c.y] = 1;
1074
1075 if(dst >= term.col) {
1076 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1077 return;
1078 }
1079 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1080 tclearregion(src, term.c.y, dst - 1, term.c.y);
1081 }
1082
1083 void
1084 tinsertblankline(int n) {
1085 if(term.c.y < term.top || term.c.y > term.bot)
1086 return;
1087
1088 tscrolldown(term.c.y, n);
1089 }
1090
1091 void
1092 tdeleteline(int n) {
1093 if(term.c.y < term.top || term.c.y > term.bot)
1094 return;
1095
1096 tscrollup(term.c.y, n);
1097 }
1098
1099 void
1100 tsetattr(int *attr, int l) {
1101 int i;
1102
1103 for(i = 0; i < l; i++) {
1104 switch(attr[i]) {
1105 case 0:
1106 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
1107 term.c.attr.fg = DefaultFG;
1108 term.c.attr.bg = DefaultBG;
1109 break;
1110 case 1:
1111 term.c.attr.mode |= ATTR_BOLD;
1112 break;
1113 case 3: /* enter standout (highlight) mode TODO: make it italic */
1114 term.c.attr.mode |= ATTR_REVERSE;
1115 break;
1116 case 4:
1117 term.c.attr.mode |= ATTR_UNDERLINE;
1118 break;
1119 case 7:
1120 term.c.attr.mode |= ATTR_REVERSE;
1121 break;
1122 case 22:
1123 term.c.attr.mode &= ~ATTR_BOLD;
1124 break;
1125 case 23: /* leave standout (highlight) mode TODO: make it italic */
1126 term.c.attr.mode &= ~ATTR_REVERSE;
1127 break;
1128 case 24:
1129 term.c.attr.mode &= ~ATTR_UNDERLINE;
1130 break;
1131 case 27:
1132 term.c.attr.mode &= ~ATTR_REVERSE;
1133 break;
1134 case 38:
1135 if(i + 2 < l && attr[i + 1] == 5) {
1136 i += 2;
1137 if(BETWEEN(attr[i], 0, 255))
1138 term.c.attr.fg = attr[i];
1139 else
1140 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
1141 }
1142 else
1143 fprintf(stderr, "erresc(38): gfx attr %d unknown\n", attr[i]);
1144 break;
1145 case 39:
1146 term.c.attr.fg = DefaultFG;
1147 break;
1148 case 48:
1149 if(i + 2 < l && attr[i + 1] == 5) {
1150 i += 2;
1151 if(BETWEEN(attr[i], 0, 255))
1152 term.c.attr.bg = attr[i];
1153 else
1154 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
1155 }
1156 else
1157 fprintf(stderr, "erresc(48): gfx attr %d unknown\n", attr[i]);
1158 break;
1159 case 49:
1160 term.c.attr.bg = DefaultBG;
1161 break;
1162 default:
1163 if(BETWEEN(attr[i], 30, 37))
1164 term.c.attr.fg = attr[i] - 30;
1165 else if(BETWEEN(attr[i], 40, 47))
1166 term.c.attr.bg = attr[i] - 40;
1167 else if(BETWEEN(attr[i], 90, 97))
1168 term.c.attr.fg = attr[i] - 90 + 8;
1169 else if(BETWEEN(attr[i], 100, 107))
1170 term.c.attr.fg = attr[i] - 100 + 8;
1171 else
1172 fprintf(stderr, "erresc(default): gfx attr %d unknown\n", attr[i]), csidump();
1173 break;
1174 }
1175 }
1176 }
1177
1178 void
1179 tsetscroll(int t, int b) {
1180 int temp;
1181
1182 LIMIT(t, 0, term.row-1);
1183 LIMIT(b, 0, term.row-1);
1184 if(t > b) {
1185 temp = t;
1186 t = b;
1187 b = temp;
1188 }
1189 term.top = t;
1190 term.bot = b;
1191 }
1192
1193 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1194
1195 void
1196 tsetmode(bool priv, bool set, int *args, int narg) {
1197 int *lim, mode;
1198
1199 for (lim = args + narg; args < lim; ++args) {
1200 if(priv) {
1201 switch(*args) {
1202 case 1:
1203 MODBIT(term.mode, set, MODE_APPKEYPAD);
1204 break;
1205 case 5: /* DECSCNM -- Reverve video */
1206 mode = term.mode;
1207 MODBIT(term.mode,set, MODE_REVERSE);
1208 if (mode != term.mode)
1209 draw();
1210 break;
1211 case 7:
1212 MODBIT(term.mode, set, MODE_WRAP);
1213 break;
1214 case 20:
1215 MODBIT(term.mode, set, MODE_CRLF);
1216 break;
1217 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1218 break;
1219 case 25:
1220 MODBIT(term.c.state, !set, CURSOR_HIDE);
1221 break;
1222 case 1000: /* 1000,1002: enable xterm mouse report */
1223 MODBIT(term.mode, set, MODE_MOUSEBTN);
1224 break;
1225 case 1002:
1226 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1227 break;
1228 case 1049: /* = 1047 and 1048 */
1229 case 47:
1230 case 1047:
1231 if(IS_SET(MODE_ALTSCREEN))
1232 tclearregion(0, 0, term.col-1, term.row-1);
1233 if ((set && !IS_SET(MODE_ALTSCREEN)) ||
1234 (!set && IS_SET(MODE_ALTSCREEN))) {
1235 tswapscreen();
1236 }
1237 if (*args != 1049)
1238 break;
1239 /* pass through */
1240 case 1048:
1241 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1242 break;
1243 default:
1244 fprintf(stderr,
1245 "erresc: unknown private set/reset mode %d\n",
1246 *args);
1247 break;
1248 }
1249 } else {
1250 switch(*args) {
1251 case 4:
1252 MODBIT(term.mode, set, MODE_INSERT);
1253 break;
1254 default:
1255 fprintf(stderr,
1256 "erresc: unknown set/reset mode %d\n",
1257 *args);
1258 break;
1259 }
1260 }
1261 }
1262 }
1263 #undef MODBIT
1264
1265
1266 void
1267 csihandle(void) {
1268 switch(csiescseq.mode) {
1269 default:
1270 unknown:
1271 fprintf(stderr, "erresc: unknown csi ");
1272 csidump();
1273 /* die(""); */
1274 break;
1275 case '@': /* ICH -- Insert <n> blank char */
1276 DEFAULT(csiescseq.arg[0], 1);
1277 tinsertblank(csiescseq.arg[0]);
1278 break;
1279 case 'A': /* CUU -- Cursor <n> Up */
1280 case 'e':
1281 DEFAULT(csiescseq.arg[0], 1);
1282 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1283 break;
1284 case 'B': /* CUD -- Cursor <n> Down */
1285 DEFAULT(csiescseq.arg[0], 1);
1286 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1287 break;
1288 case 'C': /* CUF -- Cursor <n> Forward */
1289 case 'a':
1290 DEFAULT(csiescseq.arg[0], 1);
1291 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1292 break;
1293 case 'D': /* CUB -- Cursor <n> Backward */
1294 DEFAULT(csiescseq.arg[0], 1);
1295 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1296 break;
1297 case 'E': /* CNL -- Cursor <n> Down and first col */
1298 DEFAULT(csiescseq.arg[0], 1);
1299 tmoveto(0, term.c.y+csiescseq.arg[0]);
1300 break;
1301 case 'F': /* CPL -- Cursor <n> Up and first col */
1302 DEFAULT(csiescseq.arg[0], 1);
1303 tmoveto(0, term.c.y-csiescseq.arg[0]);
1304 break;
1305 case 'g': /* TBC -- Tabulation clear */
1306 switch (csiescseq.arg[0]) {
1307 case 0: /* clear current tab stop */
1308 term.tabs[term.c.x] = 0;
1309 break;
1310 case 3: /* clear all the tabs */
1311 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1312 break;
1313 default:
1314 goto unknown;
1315 }
1316 break;
1317 case 'G': /* CHA -- Move to <col> */
1318 case '`': /* XXX: HPA -- same? */
1319 DEFAULT(csiescseq.arg[0], 1);
1320 tmoveto(csiescseq.arg[0]-1, term.c.y);
1321 break;
1322 case 'H': /* CUP -- Move to <row> <col> */
1323 case 'f': /* XXX: HVP -- same? */
1324 DEFAULT(csiescseq.arg[0], 1);
1325 DEFAULT(csiescseq.arg[1], 1);
1326 tmoveto(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1327 break;
1328 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1329 DEFAULT(csiescseq.arg[0], 1);
1330 while (csiescseq.arg[0]--)
1331 tputtab(1);
1332 break;
1333 case 'J': /* ED -- Clear screen */
1334 sel.bx = -1;
1335 switch(csiescseq.arg[0]) {
1336 case 0: /* below */
1337 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1338 if(term.c.y < term.row-1)
1339 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1340 break;
1341 case 1: /* above */
1342 if(term.c.y > 1)
1343 tclearregion(0, 0, term.col-1, term.c.y-1);
1344 tclearregion(0, term.c.y, term.c.x, term.c.y);
1345 break;
1346 case 2: /* all */
1347 tclearregion(0, 0, term.col-1, term.row-1);
1348 break;
1349 default:
1350 goto unknown;
1351 }
1352 break;
1353 case 'K': /* EL -- Clear line */
1354 switch(csiescseq.arg[0]) {
1355 case 0: /* right */
1356 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1357 break;
1358 case 1: /* left */
1359 tclearregion(0, term.c.y, term.c.x, term.c.y);
1360 break;
1361 case 2: /* all */
1362 tclearregion(0, term.c.y, term.col-1, term.c.y);
1363 break;
1364 }
1365 break;
1366 case 'S': /* SU -- Scroll <n> line up */
1367 DEFAULT(csiescseq.arg[0], 1);
1368 tscrollup(term.top, csiescseq.arg[0]);
1369 break;
1370 case 'T': /* SD -- Scroll <n> line down */
1371 DEFAULT(csiescseq.arg[0], 1);
1372 tscrolldown(term.top, csiescseq.arg[0]);
1373 break;
1374 case 'L': /* IL -- Insert <n> blank lines */
1375 DEFAULT(csiescseq.arg[0], 1);
1376 tinsertblankline(csiescseq.arg[0]);
1377 break;
1378 case 'l': /* RM -- Reset Mode */
1379 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1380 break;
1381 case 'M': /* DL -- Delete <n> lines */
1382 DEFAULT(csiescseq.arg[0], 1);
1383 tdeleteline(csiescseq.arg[0]);
1384 break;
1385 case 'X': /* ECH -- Erase <n> char */
1386 DEFAULT(csiescseq.arg[0], 1);
1387 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
1388 break;
1389 case 'P': /* DCH -- Delete <n> char */
1390 DEFAULT(csiescseq.arg[0], 1);
1391 tdeletechar(csiescseq.arg[0]);
1392 break;
1393 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1394 DEFAULT(csiescseq.arg[0], 1);
1395 while (csiescseq.arg[0]--)
1396 tputtab(0);
1397 break;
1398 case 'd': /* VPA -- Move to <row> */
1399 DEFAULT(csiescseq.arg[0], 1);
1400 tmoveto(term.c.x, csiescseq.arg[0]-1);
1401 break;
1402 case 'h': /* SM -- Set terminal mode */
1403 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1404 break;
1405 case 'm': /* SGR -- Terminal attribute (color) */
1406 tsetattr(csiescseq.arg, csiescseq.narg);
1407 break;
1408 case 'r': /* DECSTBM -- Set Scrolling Region */
1409 if(csiescseq.priv)
1410 goto unknown;
1411 else {
1412 DEFAULT(csiescseq.arg[0], 1);
1413 DEFAULT(csiescseq.arg[1], term.row);
1414 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1415 tmoveto(0, 0);
1416 }
1417 break;
1418 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1419 tcursor(CURSOR_SAVE);
1420 break;
1421 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1422 tcursor(CURSOR_LOAD);
1423 break;
1424 }
1425 }
1426
1427 void
1428 csidump(void) {
1429 int i;
1430 printf("ESC[");
1431 for(i = 0; i < csiescseq.len; i++) {
1432 uint c = csiescseq.buf[i] & 0xff;
1433 if(isprint(c)) putchar(c);
1434 else if(c == '\n') printf("(\\n)");
1435 else if(c == '\r') printf("(\\r)");
1436 else if(c == 0x1b) printf("(\\e)");
1437 else printf("(%02x)", c);
1438 }
1439 putchar('\n');
1440 }
1441
1442 void
1443 csireset(void) {
1444 memset(&csiescseq, 0, sizeof(csiescseq));
1445 }
1446
1447 void
1448 strhandle(void) {
1449 char *p;
1450
1451 /*
1452 * TODO: make this being useful in case of color palette change.
1453 */
1454 strparse();
1455
1456 p = strescseq.buf;
1457
1458 switch(strescseq.type) {
1459 case ']': /* OSC -- Operating System Command */
1460 switch(p[0]) {
1461 case '0':
1462 case '1':
1463 case '2':
1464 /*
1465 * TODO: Handle special chars in string, like umlauts.
1466 */
1467 if(p[1] == ';') {
1468 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1469 }
1470 break;
1471 case ';':
1472 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1473 break;
1474 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1475 break;
1476 default:
1477 fprintf(stderr, "erresc: unknown str ");
1478 strdump();
1479 break;
1480 }
1481 break;
1482 case 'P': /* DSC -- Device Control String */
1483 case '_': /* APC -- Application Program Command */
1484 case '^': /* PM -- Privacy Message */
1485 default:
1486 fprintf(stderr, "erresc: unknown str ");
1487 strdump();
1488 /* die(""); */
1489 break;
1490 }
1491 }
1492
1493 void
1494 strparse(void) {
1495 /*
1496 * TODO: Implement parsing like for CSI when required.
1497 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1498 */
1499 return;
1500 }
1501
1502 void
1503 strdump(void) {
1504 int i;
1505 printf("ESC%c", strescseq.type);
1506 for(i = 0; i < strescseq.len; i++) {
1507 uint c = strescseq.buf[i] & 0xff;
1508 if(isprint(c)) putchar(c);
1509 else if(c == '\n') printf("(\\n)");
1510 else if(c == '\r') printf("(\\r)");
1511 else if(c == 0x1b) printf("(\\e)");
1512 else printf("(%02x)", c);
1513 }
1514 printf("ESC\\\n");
1515 }
1516
1517 void
1518 strreset(void) {
1519 memset(&strescseq, 0, sizeof(strescseq));
1520 }
1521
1522 void
1523 tputtab(bool forward) {
1524 unsigned x = term.c.x;
1525
1526 if (forward) {
1527 if (x == term.col)
1528 return;
1529 for (++x; x < term.col && !term.tabs[x]; ++x)
1530 /* nothing */ ;
1531 } else {
1532 if (x == 0)
1533 return;
1534 for (--x; x > 0 && !term.tabs[x]; --x)
1535 /* nothing */ ;
1536 }
1537 tmoveto(x, term.c.y);
1538 }
1539
1540 void
1541 tputc(char *c) {
1542 char ascii = *c;
1543
1544 if (fileio)
1545 putc(ascii, fileio);
1546 if(term.esc & ESC_START) {
1547 if(term.esc & ESC_CSI) {
1548 csiescseq.buf[csiescseq.len++] = ascii;
1549 if(BETWEEN(ascii, 0x40, 0x7E) || csiescseq.len >= ESC_BUF_SIZ) {
1550 term.esc = 0;
1551 csiparse(), csihandle();
1552 }
1553 } else if(term.esc & ESC_STR) {
1554 switch(ascii) {
1555 case '\033':
1556 term.esc = ESC_START | ESC_STR_END;
1557 break;
1558 case '\a': /* backwards compatibility to xterm */
1559 term.esc = 0;
1560 strhandle();
1561 break;
1562 default:
1563 strescseq.buf[strescseq.len++] = ascii;
1564 if (strescseq.len+1 >= STR_BUF_SIZ) {
1565 term.esc = 0;
1566 strhandle();
1567 }
1568 }
1569 } else if(term.esc & ESC_STR_END) {
1570 term.esc = 0;
1571 if(ascii == '\\')
1572 strhandle();
1573 } else if(term.esc & ESC_ALTCHARSET) {
1574 switch(ascii) {
1575 case '0': /* Line drawing crap */
1576 term.c.attr.mode |= ATTR_GFX;
1577 break;
1578 case 'B': /* Back to regular text */
1579 term.c.attr.mode &= ~ATTR_GFX;
1580 break;
1581 default:
1582 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1583 }
1584 term.esc = 0;
1585 } else {
1586 switch(ascii) {
1587 case '[':
1588 term.esc |= ESC_CSI;
1589 break;
1590 case 'P': /* DCS -- Device Control String */
1591 case '_': /* APC -- Application Program Command */
1592 case '^': /* PM -- Privacy Message */
1593 case ']': /* OSC -- Operating System Command */
1594 strreset();
1595 strescseq.type = ascii;
1596 term.esc |= ESC_STR;
1597 break;
1598 case '(':
1599 term.esc |= ESC_ALTCHARSET;
1600 break;
1601 case 'D': /* IND -- Linefeed */
1602 if(term.c.y == term.bot)
1603 tscrollup(term.top, 1);
1604 else
1605 tmoveto(term.c.x, term.c.y+1);
1606 term.esc = 0;
1607 break;
1608 case 'E': /* NEL -- Next line */
1609 tnewline(1); /* always go to first col */
1610 term.esc = 0;
1611 break;
1612 case 'H': /* HTS -- Horizontal tab stop */
1613 term.tabs[term.c.x] = 1;
1614 term.esc = 0;
1615 break;
1616 case 'M': /* RI -- Reverse index */
1617 if(term.c.y == term.top)
1618 tscrolldown(term.top, 1);
1619 else
1620 tmoveto(term.c.x, term.c.y-1);
1621 term.esc = 0;
1622 break;
1623 case 'c': /* RIS -- Reset to inital state */
1624 treset();
1625 term.esc = 0;
1626 break;
1627 case '=': /* DECPAM -- Application keypad */
1628 term.mode |= MODE_APPKEYPAD;
1629 term.esc = 0;
1630 break;
1631 case '>': /* DECPNM -- Normal keypad */
1632 term.mode &= ~MODE_APPKEYPAD;
1633 term.esc = 0;
1634 break;
1635 case '7': /* DECSC -- Save Cursor */
1636 tcursor(CURSOR_SAVE);
1637 term.esc = 0;
1638 break;
1639 case '8': /* DECRC -- Restore Cursor */
1640 tcursor(CURSOR_LOAD);
1641 term.esc = 0;
1642 break;
1643 case '\\': /* ST -- Stop */
1644 term.esc = 0;
1645 break;
1646 default:
1647 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
1648 (uchar) ascii, isprint(ascii)?ascii:'.');
1649 term.esc = 0;
1650 }
1651 }
1652 } else {
1653 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
1654 sel.bx = -1;
1655 switch(ascii) {
1656 case '\t':
1657 tputtab(1);
1658 break;
1659 case '\b':
1660 tmoveto(term.c.x-1, term.c.y);
1661 break;
1662 case '\r':
1663 tmoveto(0, term.c.y);
1664 break;
1665 case '\f':
1666 case '\v':
1667 case '\n':
1668 /* go to first col if the mode is set */
1669 tnewline(IS_SET(MODE_CRLF));
1670 break;
1671 case '\a':
1672 if(!(xw.state & WIN_FOCUSED))
1673 xseturgency(1);
1674 break;
1675 case '\033':
1676 csireset();
1677 term.esc = ESC_START;
1678 break;
1679 default:
1680 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1681 tnewline(1); /* always go to first col */
1682 tsetchar(c);
1683 if(term.c.x+1 < term.col)
1684 tmoveto(term.c.x+1, term.c.y);
1685 else
1686 term.c.state |= CURSOR_WRAPNEXT;
1687 }
1688 }
1689 }
1690
1691 int
1692 tresize(int col, int row) {
1693 int i, x;
1694 int minrow = MIN(row, term.row);
1695 int mincol = MIN(col, term.col);
1696 int slide = term.c.y - row + 1;
1697
1698 if(col < 1 || row < 1)
1699 return 0;
1700
1701 /* free unneeded rows */
1702 i = 0;
1703 if(slide > 0) {
1704 /* slide screen to keep cursor where we expect it -
1705 * tscrollup would work here, but we can optimize to
1706 * memmove because we're freeing the earlier lines */
1707 for(/* i = 0 */; i < slide; i++) {
1708 free(term.line[i]);
1709 free(term.alt[i]);
1710 }
1711 memmove(term.line, term.line + slide, row * sizeof(Line));
1712 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1713 }
1714 for(i += row; i < term.row; i++) {
1715 free(term.line[i]);
1716 free(term.alt[i]);
1717 }
1718
1719 /* resize to new height */
1720 term.line = realloc(term.line, row * sizeof(Line));
1721 term.alt = realloc(term.alt, row * sizeof(Line));
1722 term.dirty = realloc(term.dirty, row * sizeof(*term.dirty));
1723 term.tabs = realloc(term.tabs, col * sizeof(*term.tabs));
1724
1725 /* resize each row to new width, zero-pad if needed */
1726 for(i = 0; i < minrow; i++) {
1727 term.dirty[i] = 1;
1728 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
1729 term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
1730 for(x = mincol; x < col; x++) {
1731 term.line[i][x].state = 0;
1732 term.alt[i][x].state = 0;
1733 }
1734 }
1735
1736 /* allocate any new rows */
1737 for(/* i == minrow */; i < row; i++) {
1738 term.dirty[i] = 1;
1739 term.line[i] = calloc(col, sizeof(Glyph));
1740 term.alt [i] = calloc(col, sizeof(Glyph));
1741 }
1742 if (col > term.col) {
1743 bool *bp = term.tabs + term.col;
1744
1745 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
1746 while (--bp > term.tabs && !*bp)
1747 /* nothing */ ;
1748 for (bp += TAB; bp < term.tabs + col; bp += TAB)
1749 *bp = 1;
1750 }
1751 /* update terminal size */
1752 term.col = col, term.row = row;
1753 /* make use of the LIMIT in tmoveto */
1754 tmoveto(term.c.x, term.c.y);
1755 /* reset scrolling region */
1756 tsetscroll(0, row-1);
1757
1758 return (slide > 0);
1759 }
1760
1761 void
1762 xresize(int col, int row) {
1763 xw.w = MAX(1, 2*BORDER + col * xw.cw);
1764 xw.h = MAX(1, 2*BORDER + row * xw.ch);
1765 }
1766
1767 void
1768 xloadcols(void) {
1769 int i, r, g, b;
1770 XColor color;
1771 ulong white = WhitePixel(xw.dpy, xw.scr);
1772
1773 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
1774 for(i = 0; i < LEN(colorname); i++) {
1775 if(!colorname[i])
1776 continue;
1777 if(!XAllocNamedColor(xw.dpy, xw.cmap, colorname[i], &color, &color)) {
1778 dc.col[i] = white;
1779 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1780 } else
1781 dc.col[i] = color.pixel;
1782 }
1783
1784 /* load colors [16-255] ; same colors as xterm */
1785 for(i = 16, r = 0; r < 6; r++)
1786 for(g = 0; g < 6; g++)
1787 for(b = 0; b < 6; b++) {
1788 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1789 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1790 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1791 if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
1792 dc.col[i] = white;
1793 fprintf(stderr, "Could not allocate color %d\n", i);
1794 } else
1795 dc.col[i] = color.pixel;
1796 i++;
1797 }
1798
1799 for(r = 0; r < 24; r++, i++) {
1800 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1801 if (!XAllocColor(xw.dpy, xw.cmap, &color)) {
1802 dc.col[i] = white;
1803 fprintf(stderr, "Could not allocate color %d\n", i);
1804 } else
1805 dc.col[i] = color.pixel;
1806 }
1807 }
1808
1809 void
1810 xclear(int x1, int y1, int x2, int y2) {
1811 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
1812 XFillRectangle(xw.dpy, xw.buf, dc.gc,
1813 BORDER + x1 * xw.cw, BORDER + y1 * xw.ch,
1814 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1815 }
1816
1817 void
1818 xhints(void) {
1819 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
1820 XWMHints wm = {.flags = InputHint, .input = 1};
1821 XSizeHints size = {
1822 .flags = PSize | PResizeInc | PBaseSize,
1823 .height = xw.h,
1824 .width = xw.w,
1825 .height_inc = xw.ch,
1826 .width_inc = xw.cw,
1827 .base_height = 2*BORDER,
1828 .base_width = 2*BORDER,
1829 };
1830 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1831 }
1832
1833 XFontSet
1834 xinitfont(char *fontstr) {
1835 XFontSet set;
1836 char *def, **missing;
1837 int n;
1838
1839 missing = NULL;
1840 set = XCreateFontSet(xw.dpy, fontstr, &missing, &n, &def);
1841 if(missing) {
1842 while(n--)
1843 fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
1844 XFreeStringList(missing);
1845 }
1846 return set;
1847 }
1848
1849 void
1850 xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing) {
1851 XFontStruct **xfonts;
1852 char **font_names;
1853 int i, n;
1854
1855 *ascent = *descent = *lbearing = *rbearing = 0;
1856 n = XFontsOfFontSet(set, &xfonts, &font_names);
1857 for(i = 0; i < n; i++) {
1858 *ascent = MAX(*ascent, (*xfonts)->ascent);
1859 *descent = MAX(*descent, (*xfonts)->descent);
1860 *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
1861 *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
1862 xfonts++;
1863 }
1864 }
1865
1866 void
1867 initfonts(char *fontstr, char *bfontstr) {
1868 if((dc.font.set = xinitfont(fontstr)) == NULL ||
1869 (dc.bfont.set = xinitfont(bfontstr)) == NULL)
1870 die("Can't load font %s\n", dc.font.set ? BOLDFONT : FONT);
1871 xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
1872 &dc.font.lbearing, &dc.font.rbearing);
1873 xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
1874 &dc.bfont.lbearing, &dc.bfont.rbearing);
1875 }
1876
1877 void
1878 xinit(void) {
1879 XSetWindowAttributes attrs;
1880 Cursor cursor;
1881 Window parent;
1882
1883 if(!(xw.dpy = XOpenDisplay(NULL)))
1884 die("Can't open display\n");
1885 xw.scr = XDefaultScreen(xw.dpy);
1886
1887 /* font */
1888 initfonts(FONT, BOLDFONT);
1889
1890 /* XXX: Assuming same size for bold font */
1891 xw.cw = dc.font.rbearing - dc.font.lbearing;
1892 xw.ch = dc.font.ascent + dc.font.descent;
1893
1894 /* colors */
1895 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1896 xloadcols();
1897
1898 /* window - default size */
1899 xw.h = 2*BORDER + term.row * xw.ch;
1900 xw.w = 2*BORDER + term.col * xw.cw;
1901
1902 attrs.background_pixel = dc.col[DefaultBG];
1903 attrs.border_pixel = dc.col[DefaultBG];
1904 attrs.bit_gravity = NorthWestGravity;
1905 attrs.event_mask = FocusChangeMask | KeyPressMask
1906 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1907 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask
1908 | EnterWindowMask | LeaveWindowMask;
1909 attrs.colormap = xw.cmap;
1910
1911 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
1912 xw.win = XCreateWindow(xw.dpy, parent, 0, 0,
1913 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
1914 XDefaultVisual(xw.dpy, xw.scr),
1915 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
1916 | CWColormap,
1917 &attrs);
1918 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
1919
1920
1921 /* input methods */
1922 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
1923 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
1924 | XIMStatusNothing, XNClientWindow, xw.win,
1925 XNFocusWindow, xw.win, NULL);
1926 /* gc */
1927 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
1928
1929 /* white cursor, black outline */
1930 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
1931 XDefineCursor(xw.dpy, xw.win, cursor);
1932 XRecolorCursor(xw.dpy, cursor,
1933 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
1934 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
1935
1936 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
1937
1938 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
1939 XMapWindow(xw.dpy, xw.win);
1940 xhints();
1941 XSync(xw.dpy, 0);
1942 }
1943
1944 void
1945 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
1946 int fg = base.fg, bg = base.bg, temp;
1947 int winx = BORDER+x*xw.cw, winy = BORDER+y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
1948 XFontSet fontset = dc.font.set;
1949 int i;
1950
1951 /* only switch default fg/bg if term is in RV mode */
1952 if(IS_SET(MODE_REVERSE)) {
1953 if(fg == DefaultFG)
1954 fg = DefaultBG;
1955 if(bg == DefaultBG)
1956 bg = DefaultFG;
1957 }
1958
1959 if(base.mode & ATTR_REVERSE)
1960 temp = fg, fg = bg, bg = temp;
1961
1962 if(base.mode & ATTR_BOLD) {
1963 fg += 8;
1964 fontset = dc.bfont.set;
1965 }
1966
1967 XSetBackground(xw.dpy, dc.gc, dc.col[bg]);
1968 XSetForeground(xw.dpy, dc.gc, dc.col[fg]);
1969
1970 if(base.mode & ATTR_GFX) {
1971 for(i = 0; i < bytelen; i++) {
1972 char c = gfx[(uint)s[i] % 256];
1973 if(c)
1974 s[i] = c;
1975 else if(s[i] > 0x5f)
1976 s[i] -= 0x5f;
1977 }
1978 }
1979
1980 XmbDrawImageString(xw.dpy, xw.buf, fontset, dc.gc, winx, winy, s, bytelen);
1981
1982 if(base.mode & ATTR_UNDERLINE)
1983 XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1984 }
1985
1986 /* copy buffer pixmap to screen pixmap */
1987 void
1988 xcopy() {
1989 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
1990 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
1991
1992 }
1993
1994 void
1995 xdrawcursor(void) {
1996 static int oldx = 0;
1997 static int oldy = 0;
1998 int sl;
1999 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
2000
2001 LIMIT(oldx, 0, term.col-1);
2002 LIMIT(oldy, 0, term.row-1);
2003
2004 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2005 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2006
2007 /* remove the old cursor */
2008 if(term.line[oldy][oldx].state & GLYPH_SET) {
2009 sl = utf8size(term.line[oldy][oldx].c);
2010 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
2011 } else
2012 xclear(oldx, oldy, oldx, oldy);
2013
2014 xcopy(oldx, oldy, 1, 1);
2015
2016 /* draw the new one */
2017 if(!(term.c.state & CURSOR_HIDE)) {
2018 if(!(xw.state & WIN_FOCUSED))
2019 g.bg = DefaultUCS;
2020
2021 if(IS_SET(MODE_REVERSE))
2022 g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
2023
2024 sl = utf8size(g.c);
2025 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2026 oldx = term.c.x, oldy = term.c.y;
2027 }
2028
2029 xcopy(term.c.x, term.c.y, 1, 1);
2030 }
2031
2032 void
2033 draw() {
2034 drawregion(0, 0, term.col, term.row);
2035 xcopy();
2036 gettimeofday(&xw.lastdraw, NULL);
2037 }
2038
2039 void
2040 drawregion(int x1, int y1, int x2, int y2) {
2041 int ic, ib, x, y, ox, sl;
2042 Glyph base, new;
2043 char buf[DRAW_BUF_SIZ];
2044
2045 if(!(xw.state & WIN_VISIBLE))
2046 return;
2047
2048 for(y = y1; y < y2; y++) {
2049 if(!term.dirty[y])
2050 continue;
2051 xclear(0, y, term.col, y);
2052 term.dirty[y] = 0;
2053 base = term.line[y][0];
2054 ic = ib = ox = 0;
2055 for(x = x1; x < x2; x++) {
2056 new = term.line[y][x];
2057 if(sel.bx != -1 && *(new.c) && selected(x, y))
2058 new.mode ^= ATTR_REVERSE;
2059 if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
2060 ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2061 xdraws(buf, base, ox, y, ic, ib);
2062 ic = ib = 0;
2063 }
2064 if(new.state & GLYPH_SET) {
2065 if(ib == 0) {
2066 ox = x;
2067 base = new;
2068 }
2069 sl = utf8size(new.c);
2070 memcpy(buf+ib, new.c, sl);
2071 ib += sl;
2072 ++ic;
2073 }
2074 }
2075 if(ib > 0)
2076 xdraws(buf, base, ox, y, ic, ib);
2077 }
2078 xdrawcursor();
2079 }
2080
2081 void
2082 expose(XEvent *ev) {
2083 XExposeEvent *e = &ev->xexpose;
2084 if(xw.state & WIN_REDRAW) {
2085 if(!e->count)
2086 xw.state &= ~WIN_REDRAW;
2087 }
2088 xcopy();
2089 }
2090
2091 void
2092 visibility(XEvent *ev) {
2093 XVisibilityEvent *e = &ev->xvisibility;
2094 if(e->state == VisibilityFullyObscured)
2095 xw.state &= ~WIN_VISIBLE;
2096 else if(!(xw.state & WIN_VISIBLE))
2097 /* need a full redraw for next Expose, not just a buf copy */
2098 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2099 }
2100
2101 void
2102 unmap(XEvent *ev) {
2103 xw.state &= ~WIN_VISIBLE;
2104 }
2105
2106 void
2107 xseturgency(int add) {
2108 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2109 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2110 XSetWMHints(xw.dpy, xw.win, h);
2111 XFree(h);
2112 }
2113
2114 void
2115 focus(XEvent *ev) {
2116 if(ev->type == FocusIn) {
2117 xw.state |= WIN_FOCUSED;
2118 xseturgency(0);
2119 } else
2120 xw.state &= ~WIN_FOCUSED;
2121 draw();
2122 }
2123
2124 char*
2125 kmap(KeySym k, uint state) {
2126 int i;
2127 state &= ~Mod2Mask;
2128 for(i = 0; i < LEN(key); i++) {
2129 uint mask = key[i].mask;
2130 if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
2131 return (char*)key[i].s;
2132 }
2133 return NULL;
2134 }
2135
2136 void
2137 kpress(XEvent *ev) {
2138 XKeyEvent *e = &ev->xkey;
2139 KeySym ksym;
2140 char buf[32];
2141 char *customkey;
2142 int len;
2143 int meta;
2144 int shift;
2145 Status status;
2146
2147 meta = e->state & Mod1Mask;
2148 shift = e->state & ShiftMask;
2149 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
2150
2151 /* 1. custom keys from config.h */
2152 if((customkey = kmap(ksym, e->state)))
2153 ttywrite(customkey, strlen(customkey));
2154 /* 2. hardcoded (overrides X lookup) */
2155 else
2156 switch(ksym) {
2157 case XK_Up:
2158 case XK_Down:
2159 case XK_Left:
2160 case XK_Right:
2161 /* XXX: shift up/down doesn't work */
2162 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
2163 ttywrite(buf, 3);
2164 break;
2165 case XK_Insert:
2166 if(shift)
2167 selpaste();
2168 break;
2169 case XK_Return:
2170 if(IS_SET(MODE_CRLF))
2171 ttywrite("\r\n", 2);
2172 else
2173 ttywrite("\r", 1);
2174 break;
2175 /* 3. X lookup */
2176 default:
2177 if(len > 0) {
2178 if(meta && len == 1)
2179 ttywrite("\033", 1);
2180 ttywrite(buf, len);
2181 }
2182 break;
2183 }
2184 }
2185
2186 void
2187 cmessage(XEvent *e) {
2188 /* See xembed specs
2189 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2190 if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2191 if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2192 xw.state |= WIN_FOCUSED;
2193 xseturgency(0);
2194 } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2195 xw.state &= ~WIN_FOCUSED;
2196 }
2197 draw();
2198 }
2199 }
2200
2201 void
2202 resize(XEvent *e) {
2203 int col, row;
2204
2205 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2206 return;
2207
2208 xw.w = e->xconfigure.width;
2209 xw.h = e->xconfigure.height;
2210 col = (xw.w - 2*BORDER) / xw.cw;
2211 row = (xw.h - 2*BORDER) / xw.ch;
2212 if(col == term.col && row == term.row)
2213 return;
2214 if(tresize(col, row))
2215 draw();
2216 ttyresize(col, row);
2217 xresize(col, row);
2218 }
2219
2220 bool
2221 last_draw_too_old(void) {
2222 struct timeval now;
2223 gettimeofday(&now, NULL);
2224 return TIMEDIFF(now, xw.lastdraw) >= DRAW_TIMEOUT/1000;
2225 }
2226
2227 void
2228 run(void) {
2229 XEvent ev;
2230 fd_set rfd;
2231 int xfd = XConnectionNumber(xw.dpy);
2232 struct timeval timeout = {0};
2233 bool stuff_to_print = 0;
2234
2235 for(;;) {
2236 FD_ZERO(&rfd);
2237 FD_SET(cmdfd, &rfd);
2238 FD_SET(xfd, &rfd);
2239 timeout.tv_sec = 0;
2240 timeout.tv_usec = SELECT_TIMEOUT;
2241 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, &timeout) < 0) {
2242 if(errno == EINTR)
2243 continue;
2244 die("select failed: %s\n", SERRNO);
2245 }
2246 if(FD_ISSET(cmdfd, &rfd)) {
2247 ttyread();
2248 stuff_to_print = 1;
2249 }
2250
2251 if(stuff_to_print && last_draw_too_old()) {
2252 stuff_to_print = 0;
2253 draw();
2254 }
2255
2256 while(XPending(xw.dpy)) {
2257 XNextEvent(xw.dpy, &ev);
2258 if(XFilterEvent(&ev, xw.win))
2259 continue;
2260 if(handler[ev.type])
2261 (handler[ev.type])(&ev);
2262 }
2263 }
2264 }
2265
2266 int
2267 main(int argc, char *argv[]) {
2268 int i;
2269
2270 for(i = 1; i < argc; i++) {
2271 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2272 case 't':
2273 if(++i < argc) opt_title = argv[i];
2274 break;
2275 case 'c':
2276 if(++i < argc) opt_class = argv[i];
2277 break;
2278 case 'w':
2279 if(++i < argc) opt_embed = argv[i];
2280 break;
2281 case 'f':
2282 if (++i < argc) opt_io = argv[i];
2283 break;
2284 case 'e':
2285 /* eat every remaining arguments */
2286 if(++i < argc) opt_cmd = &argv[i];
2287 goto run;
2288 case 'v':
2289 default:
2290 die(USAGE);
2291 }
2292 }
2293
2294 run:
2295 setlocale(LC_CTYPE, "");
2296 tnew(80, 24);
2297 ttynew();
2298 xinit();
2299 selinit();
2300 run();
2301 return 0;
2302 }