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Applying the CBT patch of Roberto Vargas. Thanks.
[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #define _XOPEN_SOURCE 600
3 #include <ctype.h>
4 #include <errno.h>
5 #include <fcntl.h>
6 #include <limits.h>
7 #include <locale.h>
8 #include <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <sys/ioctl.h>
15 #include <sys/select.h>
16 #include <sys/stat.h>
17 #include <sys/time.h>
18 #include <sys/types.h>
19 #include <sys/wait.h>
20 #include <time.h>
21 #include <unistd.h>
22 #include <X11/Xatom.h>
23 #include <X11/Xlib.h>
24 #include <X11/Xutil.h>
25 #include <X11/cursorfont.h>
26 #include <X11/keysym.h>
27 #include <X11/extensions/Xdbe.h>
28
29 #if defined(__linux)
30 #include <pty.h>
31 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
32 #include <util.h>
33 #elif defined(__FreeBSD__) || defined(__DragonFly__)
34 #include <libutil.h>
35 #endif
36
37 #define USAGE \
38 "st " VERSION " (c) 2010-2012 st engineers\n" \
39 "usage: st [-t title] [-c class] [-w windowid] [-v] [-e command...]\n"
40
41 /* XEMBED messages */
42 #define XEMBED_FOCUS_IN 4
43 #define XEMBED_FOCUS_OUT 5
44
45 /* Arbitrary sizes */
46 #define ESC_BUF_SIZ 256
47 #define ESC_ARG_SIZ 16
48 #define STR_BUF_SIZ 256
49 #define STR_ARG_SIZ 16
50 #define DRAW_BUF_SIZ 1024
51 #define UTF_SIZ 4
52 #define XK_NO_MOD UINT_MAX
53 #define XK_ANY_MOD 0
54
55 #define SELECT_TIMEOUT (20*1000) /* 20 ms */
56 #define DRAW_TIMEOUT (20*1000) /* 20 ms */
57
58 #define SERRNO strerror(errno)
59 #define MIN(a, b) ((a) < (b) ? (a) : (b))
60 #define MAX(a, b) ((a) < (b) ? (b) : (a))
61 #define LEN(a) (sizeof(a) / sizeof(a[0]))
62 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
63 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
64 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
65 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
66 #define IS_SET(flag) (term.mode & (flag))
67 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
68 #define X2COL(x) (((x) - BORDER)/xw.cw)
69 #define Y2ROW(y) (((y) - BORDER)/xw.ch)
70
71 enum glyph_attribute {
72 ATTR_NULL = 0,
73 ATTR_REVERSE = 1,
74 ATTR_UNDERLINE = 2,
75 ATTR_BOLD = 4,
76 ATTR_GFX = 8,
77 };
78
79 enum cursor_movement {
80 CURSOR_UP,
81 CURSOR_DOWN,
82 CURSOR_LEFT,
83 CURSOR_RIGHT,
84 CURSOR_SAVE,
85 CURSOR_LOAD
86 };
87
88 enum cursor_state {
89 CURSOR_DEFAULT = 0,
90 CURSOR_HIDE = 1,
91 CURSOR_WRAPNEXT = 2
92 };
93
94 enum glyph_state {
95 GLYPH_SET = 1,
96 GLYPH_DIRTY = 2
97 };
98
99 enum term_mode {
100 MODE_WRAP = 1,
101 MODE_INSERT = 2,
102 MODE_APPKEYPAD = 4,
103 MODE_ALTSCREEN = 8,
104 MODE_CRLF = 16,
105 MODE_MOUSEBTN = 32,
106 MODE_MOUSEMOTION = 64,
107 MODE_MOUSE = 32|64,
108 MODE_REVERSE = 128
109 };
110
111 enum escape_state {
112 ESC_START = 1,
113 ESC_CSI = 2,
114 ESC_STR = 4, /* DSC, OSC, PM, APC */
115 ESC_ALTCHARSET = 8,
116 ESC_STR_END = 16, /* a final string was encountered */
117 };
118
119 enum window_state {
120 WIN_VISIBLE = 1,
121 WIN_REDRAW = 2,
122 WIN_FOCUSED = 4
123 };
124
125 /* bit macro */
126 #undef B0
127 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
128
129 typedef unsigned char uchar;
130 typedef unsigned int uint;
131 typedef unsigned long ulong;
132 typedef unsigned short ushort;
133
134 typedef struct {
135 char c[UTF_SIZ]; /* character code */
136 uchar mode; /* attribute flags */
137 ushort fg; /* foreground */
138 ushort bg; /* background */
139 uchar state; /* state flags */
140 } Glyph;
141
142 typedef Glyph* Line;
143
144 typedef struct {
145 Glyph attr; /* current char attributes */
146 int x;
147 int y;
148 char state;
149 } TCursor;
150
151 /* CSI Escape sequence structs */
152 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
153 typedef struct {
154 char buf[ESC_BUF_SIZ]; /* raw string */
155 int len; /* raw string length */
156 char priv;
157 int arg[ESC_ARG_SIZ];
158 int narg; /* nb of args */
159 char mode;
160 } CSIEscape;
161
162 /* STR Escape sequence structs */
163 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
164 typedef struct {
165 char type; /* ESC type ... */
166 char buf[STR_BUF_SIZ]; /* raw string */
167 int len; /* raw string length */
168 char *args[STR_ARG_SIZ];
169 int narg; /* nb of args */
170 } STREscape;
171
172 /* Internal representation of the screen */
173 typedef struct {
174 int row; /* nb row */
175 int col; /* nb col */
176 Line* line; /* screen */
177 Line* alt; /* alternate screen */
178 bool* dirty; /* dirtyness of lines */
179 TCursor c; /* cursor */
180 int top; /* top scroll limit */
181 int bot; /* bottom scroll limit */
182 int mode; /* terminal mode flags */
183 int esc; /* escape state flags */
184 bool *tabs;
185 } Term;
186
187 /* Purely graphic info */
188 typedef struct {
189 Display* dpy;
190 Colormap cmap;
191 Window win;
192 XdbeBackBuffer buf;
193 Atom xembed;
194 XIM xim;
195 XIC xic;
196 int scr;
197 int w; /* window width */
198 int h; /* window height */
199 int ch; /* char height */
200 int cw; /* char width */
201 char state; /* focus, redraw, visible */
202 struct timeval lastdraw;
203 } XWindow;
204
205 typedef struct {
206 KeySym k;
207 uint mask;
208 char s[ESC_BUF_SIZ];
209 } Key;
210
211
212 /* TODO: use better name for vars... */
213 typedef struct {
214 int mode;
215 int bx, by;
216 int ex, ey;
217 struct {int x, y;} b, e;
218 char *clip;
219 Atom xtarget;
220 struct timeval tclick1;
221 struct timeval tclick2;
222 } Selection;
223
224 #include "config.h"
225
226 /* Drawing Context */
227 typedef struct {
228 ulong col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
229 GC gc;
230 struct {
231 int ascent;
232 int descent;
233 short lbearing;
234 short rbearing;
235 XFontSet set;
236 } font, bfont;
237 } DC;
238
239 static void die(const char*, ...);
240 static void draw(void);
241 static void drawregion(int, int, int, int);
242 static void execsh(void);
243 static void sigchld(int);
244 static void run(void);
245 static bool last_draw_too_old(void);
246
247 static void csidump(void);
248 static void csihandle(void);
249 static void csiparse(void);
250 static void csireset(void);
251 static void strdump(void);
252 static void strhandle(void);
253 static void strparse(void);
254 static void strreset(void);
255
256 static void tclearregion(int, int, int, int);
257 static void tcursor(int);
258 static void tdeletechar(int);
259 static void tdeleteline(int);
260 static void tinsertblank(int);
261 static void tinsertblankline(int);
262 static void tmoveto(int, int);
263 static void tnew(int, int);
264 static void tnewline(int);
265 static void tputtab(bool);
266 static void tputc(char*);
267 static void treset(void);
268 static int tresize(int, int);
269 static void tscrollup(int, int);
270 static void tscrolldown(int, int);
271 static void tsetattr(int*, int);
272 static void tsetchar(char*);
273 static void tsetscroll(int, int);
274 static void tswapscreen(void);
275 static void tsetdirt(int, int);
276 static void 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(1);
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 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1360 DEFAULT(csiescseq.arg[0], 1);
1361 while (csiescseq.arg[0]--)
1362 tputtab(0);
1363 break;
1364 case 'd': /* VPA -- Move to <row> */
1365 DEFAULT(csiescseq.arg[0], 1);
1366 tmoveto(term.c.x, csiescseq.arg[0]-1);
1367 break;
1368 case 'h': /* SM -- Set terminal mode */
1369 if(csiescseq.priv) {
1370 switch(csiescseq.arg[0]) {
1371 case 1:
1372 term.mode |= MODE_APPKEYPAD;
1373 break;
1374 case 5: /* DECSCNM -- Reverve video */
1375 if(!IS_SET(MODE_REVERSE)) {
1376 term.mode |= MODE_REVERSE;
1377 draw();
1378 }
1379 break;
1380 case 7:
1381 term.mode |= MODE_WRAP;
1382 break;
1383 case 20:
1384 term.mode |= MODE_CRLF;
1385 break;
1386 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1387 /* fallthrough for xterm cvvis = CSI [ ? 12 ; 25 h */
1388 if(csiescseq.narg > 1 && csiescseq.arg[1] != 25)
1389 break;
1390 case 25:
1391 term.c.state &= ~CURSOR_HIDE;
1392 break;
1393 case 1000: /* 1000,1002: enable xterm mouse report */
1394 term.mode |= MODE_MOUSEBTN;
1395 break;
1396 case 1002:
1397 term.mode |= MODE_MOUSEMOTION;
1398 break;
1399 case 1049: /* = 1047 and 1048 */
1400 case 47:
1401 case 1047:
1402 if(IS_SET(MODE_ALTSCREEN))
1403 tclearregion(0, 0, term.col-1, term.row-1);
1404 else
1405 tswapscreen();
1406 if(csiescseq.arg[0] != 1049)
1407 break;
1408 case 1048:
1409 tcursor(CURSOR_SAVE);
1410 break;
1411 default: goto unknown;
1412 }
1413 } else {
1414 switch(csiescseq.arg[0]) {
1415 case 4:
1416 term.mode |= MODE_INSERT;
1417 break;
1418 default: goto unknown;
1419 }
1420 };
1421 break;
1422 case 'm': /* SGR -- Terminal attribute (color) */
1423 tsetattr(csiescseq.arg, csiescseq.narg);
1424 break;
1425 case 'r': /* DECSTBM -- Set Scrolling Region */
1426 if(csiescseq.priv)
1427 goto unknown;
1428 else {
1429 DEFAULT(csiescseq.arg[0], 1);
1430 DEFAULT(csiescseq.arg[1], term.row);
1431 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1432 tmoveto(0, 0);
1433 }
1434 break;
1435 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1436 tcursor(CURSOR_SAVE);
1437 break;
1438 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1439 tcursor(CURSOR_LOAD);
1440 break;
1441 }
1442 }
1443
1444 void
1445 csidump(void) {
1446 int i;
1447 printf("ESC[");
1448 for(i = 0; i < csiescseq.len; i++) {
1449 uint c = csiescseq.buf[i] & 0xff;
1450 if(isprint(c)) putchar(c);
1451 else if(c == '\n') printf("(\\n)");
1452 else if(c == '\r') printf("(\\r)");
1453 else if(c == 0x1b) printf("(\\e)");
1454 else printf("(%02x)", c);
1455 }
1456 putchar('\n');
1457 }
1458
1459 void
1460 csireset(void) {
1461 memset(&csiescseq, 0, sizeof(csiescseq));
1462 }
1463
1464 void
1465 strhandle(void) {
1466 char *p;
1467
1468 p = strescseq.buf;
1469
1470 switch(strescseq.type) {
1471 case ']': /* OSC -- Operating System Command */
1472 switch(p[0]) {
1473 case '0':
1474 case '1':
1475 case '2':
1476 /*
1477 * TODO: Handle special chars in string, like umlauts.
1478 */
1479 if(p[1] == ';') {
1480 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1481 }
1482 break;
1483 case ';':
1484 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1485 break;
1486 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1487 break;
1488 default:
1489 fprintf(stderr, "erresc: unknown str ");
1490 strdump();
1491 break;
1492 }
1493 break;
1494 case 'P': /* DSC -- Device Control String */
1495 case '_': /* APC -- Application Program Command */
1496 case '^': /* PM -- Privacy Message */
1497 default:
1498 fprintf(stderr, "erresc: unknown str ");
1499 strdump();
1500 /* die(""); */
1501 break;
1502 }
1503 }
1504
1505 void
1506 strparse(void) {
1507 /*
1508 * TODO: Implement parsing like for CSI when required.
1509 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1510 */
1511 return;
1512 }
1513
1514 void
1515 strdump(void) {
1516 int i;
1517 printf("ESC%c", strescseq.type);
1518 for(i = 0; i < strescseq.len; i++) {
1519 uint c = strescseq.buf[i] & 0xff;
1520 if(isprint(c)) putchar(c);
1521 else if(c == '\n') printf("(\\n)");
1522 else if(c == '\r') printf("(\\r)");
1523 else if(c == 0x1b) printf("(\\e)");
1524 else printf("(%02x)", c);
1525 }
1526 printf("ESC\\\n");
1527 }
1528
1529 void
1530 strreset(void) {
1531 memset(&strescseq, 0, sizeof(strescseq));
1532 }
1533
1534 void
1535 tputtab(bool forward) {
1536 unsigned x = term.c.x;
1537
1538 if (forward) {
1539 if (x == term.col)
1540 return;
1541 for (++x; x < term.col && !term.tabs[x]; ++x)
1542 /* nothing */ ;
1543 } else {
1544 if (x == 0)
1545 return;
1546 for (--x; x > 0 && !term.tabs[x]; --x)
1547 /* nothing */ ;
1548 }
1549 tmoveto(x, term.c.y);
1550 }
1551
1552 void
1553 tputc(char *c) {
1554 char ascii = *c;
1555 if(term.esc & ESC_START) {
1556 if(term.esc & ESC_CSI) {
1557 csiescseq.buf[csiescseq.len++] = ascii;
1558 if(BETWEEN(ascii, 0x40, 0x7E) || csiescseq.len >= ESC_BUF_SIZ) {
1559 term.esc = 0;
1560 csiparse(), csihandle();
1561 }
1562 } else if(term.esc & ESC_STR) {
1563 switch(ascii) {
1564 case '\033':
1565 term.esc = ESC_START | ESC_STR_END;
1566 break;
1567 case '\a': /* backwards compatibility to xterm */
1568 term.esc = 0;
1569 strhandle();
1570 break;
1571 default:
1572 strescseq.buf[strescseq.len++] = ascii;
1573 if (strescseq.len+1 >= STR_BUF_SIZ) {
1574 term.esc = 0;
1575 strhandle();
1576 }
1577 }
1578 } else if(term.esc & ESC_STR_END) {
1579 term.esc = 0;
1580 if(ascii == '\\')
1581 strhandle();
1582 } else if(term.esc & ESC_ALTCHARSET) {
1583 switch(ascii) {
1584 case '0': /* Line drawing crap */
1585 term.c.attr.mode |= ATTR_GFX;
1586 break;
1587 case 'B': /* Back to regular text */
1588 term.c.attr.mode &= ~ATTR_GFX;
1589 break;
1590 default:
1591 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1592 }
1593 term.esc = 0;
1594 } else {
1595 switch(ascii) {
1596 case '[':
1597 term.esc |= ESC_CSI;
1598 break;
1599 case 'P': /* DCS -- Device Control String */
1600 case '_': /* APC -- Application Program Command */
1601 case '^': /* PM -- Privacy Message */
1602 case ']': /* OSC -- Operating System Command */
1603 strreset();
1604 strescseq.type = ascii;
1605 term.esc |= ESC_STR;
1606 break;
1607 case '(':
1608 term.esc |= ESC_ALTCHARSET;
1609 break;
1610 case 'D': /* IND -- Linefeed */
1611 if(term.c.y == term.bot)
1612 tscrollup(term.top, 1);
1613 else
1614 tmoveto(term.c.x, term.c.y+1);
1615 term.esc = 0;
1616 break;
1617 case 'E': /* NEL -- Next line */
1618 tnewline(1); /* always go to first col */
1619 term.esc = 0;
1620 break;
1621 case 'H': /* HTS -- Horizontal tab stop */
1622 term.tabs[term.c.x] = 1;
1623 term.esc = 0;
1624 break;
1625 case 'M': /* RI -- Reverse index */
1626 if(term.c.y == term.top)
1627 tscrolldown(term.top, 1);
1628 else
1629 tmoveto(term.c.x, term.c.y-1);
1630 term.esc = 0;
1631 break;
1632 case 'c': /* RIS -- Reset to inital state */
1633 treset();
1634 term.esc = 0;
1635 break;
1636 case '=': /* DECPAM -- Application keypad */
1637 term.mode |= MODE_APPKEYPAD;
1638 term.esc = 0;
1639 break;
1640 case '>': /* DECPNM -- Normal keypad */
1641 term.mode &= ~MODE_APPKEYPAD;
1642 term.esc = 0;
1643 break;
1644 case '7': /* DECSC -- Save Cursor */
1645 tcursor(CURSOR_SAVE);
1646 term.esc = 0;
1647 break;
1648 case '8': /* DECRC -- Restore Cursor */
1649 tcursor(CURSOR_LOAD);
1650 term.esc = 0;
1651 break;
1652 case '\\': /* ST -- Stop */
1653 term.esc = 0;
1654 break;
1655 default:
1656 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
1657 (uchar) ascii, isprint(ascii)?ascii:'.');
1658 term.esc = 0;
1659 }
1660 }
1661 } else {
1662 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
1663 sel.bx = -1;
1664 switch(ascii) {
1665 case '\t':
1666 tputtab(1);
1667 break;
1668 case '\b':
1669 tmoveto(term.c.x-1, term.c.y);
1670 break;
1671 case '\r':
1672 tmoveto(0, term.c.y);
1673 break;
1674 case '\f':
1675 case '\v':
1676 case '\n':
1677 /* go to first col if the mode is set */
1678 tnewline(IS_SET(MODE_CRLF));
1679 break;
1680 case '\a':
1681 if(!(xw.state & WIN_FOCUSED))
1682 xseturgency(1);
1683 break;
1684 case '\033':
1685 csireset();
1686 term.esc = ESC_START;
1687 break;
1688 default:
1689 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1690 tnewline(1); /* always go to first col */
1691 tsetchar(c);
1692 if(term.c.x+1 < term.col)
1693 tmoveto(term.c.x+1, term.c.y);
1694 else
1695 term.c.state |= CURSOR_WRAPNEXT;
1696 }
1697 }
1698 }
1699
1700 int
1701 tresize(int col, int row) {
1702 int i, x;
1703 int minrow = MIN(row, term.row);
1704 int mincol = MIN(col, term.col);
1705 int slide = term.c.y - row + 1;
1706
1707 if(col < 1 || row < 1)
1708 return 0;
1709
1710 /* free unneeded rows */
1711 i = 0;
1712 if(slide > 0) {
1713 /* slide screen to keep cursor where we expect it -
1714 * tscrollup would work here, but we can optimize to
1715 * memmove because we're freeing the earlier lines */
1716 for(/* i = 0 */; i < slide; i++) {
1717 free(term.line[i]);
1718 free(term.alt[i]);
1719 }
1720 memmove(term.line, term.line + slide, row * sizeof(Line));
1721 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1722 }
1723 for(i += row; i < term.row; i++) {
1724 free(term.line[i]);
1725 free(term.alt[i]);
1726 }
1727
1728 /* resize to new height */
1729 term.line = realloc(term.line, row * sizeof(Line));
1730 term.alt = realloc(term.alt, row * sizeof(Line));
1731 term.dirty = realloc(term.dirty, row * sizeof(*term.dirty));
1732 term.tabs = realloc(term.tabs, col * sizeof(*term.tabs));
1733
1734 /* resize each row to new width, zero-pad if needed */
1735 for(i = 0; i < minrow; i++) {
1736 term.dirty[i] = 1;
1737 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
1738 term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
1739 for(x = mincol; x < col; x++) {
1740 term.line[i][x].state = 0;
1741 term.alt[i][x].state = 0;
1742 }
1743 }
1744
1745 /* allocate any new rows */
1746 for(/* i == minrow */; i < row; i++) {
1747 term.dirty[i] = 1;
1748 term.line[i] = calloc(col, sizeof(Glyph));
1749 term.alt [i] = calloc(col, sizeof(Glyph));
1750 }
1751 if (col > term.col) {
1752 bool *bp = term.tabs + term.col;
1753
1754 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
1755 while (--bp > term.tabs && !*bp)
1756 /* nothing */ ;
1757 for (bp += TAB; bp < term.tabs + col; bp += TAB)
1758 *bp = 1;
1759 }
1760 /* update terminal size */
1761 term.col = col, term.row = row;
1762 /* make use of the LIMIT in tmoveto */
1763 tmoveto(term.c.x, term.c.y);
1764 /* reset scrolling region */
1765 tsetscroll(0, row-1);
1766
1767 return (slide > 0);
1768 }
1769
1770 void
1771 xresize(int col, int row) {
1772 xw.w = MAX(1, 2*BORDER + col * xw.cw);
1773 xw.h = MAX(1, 2*BORDER + row * xw.ch);
1774 }
1775
1776 void
1777 xloadcols(void) {
1778 int i, r, g, b;
1779 XColor color;
1780 ulong white = WhitePixel(xw.dpy, xw.scr);
1781
1782 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
1783 for(i = 0; i < LEN(colorname); i++) {
1784 if(!colorname[i])
1785 continue;
1786 if(!XAllocNamedColor(xw.dpy, xw.cmap, colorname[i], &color, &color)) {
1787 dc.col[i] = white;
1788 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1789 } else
1790 dc.col[i] = color.pixel;
1791 }
1792
1793 /* load colors [16-255] ; same colors as xterm */
1794 for(i = 16, r = 0; r < 6; r++)
1795 for(g = 0; g < 6; g++)
1796 for(b = 0; b < 6; b++) {
1797 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1798 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1799 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
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 i++;
1806 }
1807
1808 for(r = 0; r < 24; r++, i++) {
1809 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1810 if (!XAllocColor(xw.dpy, xw.cmap, &color)) {
1811 dc.col[i] = white;
1812 fprintf(stderr, "Could not allocate color %d\n", i);
1813 } else
1814 dc.col[i] = color.pixel;
1815 }
1816 }
1817
1818 void
1819 xclear(int x1, int y1, int x2, int y2) {
1820 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
1821 XFillRectangle(xw.dpy, xw.buf, dc.gc,
1822 BORDER + x1 * xw.cw, BORDER + y1 * xw.ch,
1823 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1824 }
1825
1826 void
1827 xhints(void) {
1828 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
1829 XWMHints wm = {.flags = InputHint, .input = 1};
1830 XSizeHints size = {
1831 .flags = PSize | PResizeInc | PBaseSize,
1832 .height = xw.h,
1833 .width = xw.w,
1834 .height_inc = xw.ch,
1835 .width_inc = xw.cw,
1836 .base_height = 2*BORDER,
1837 .base_width = 2*BORDER,
1838 };
1839 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1840 }
1841
1842 XFontSet
1843 xinitfont(char *fontstr) {
1844 XFontSet set;
1845 char *def, **missing;
1846 int n;
1847
1848 missing = NULL;
1849 set = XCreateFontSet(xw.dpy, fontstr, &missing, &n, &def);
1850 if(missing) {
1851 while(n--)
1852 fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
1853 XFreeStringList(missing);
1854 }
1855 return set;
1856 }
1857
1858 void
1859 xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing) {
1860 XFontStruct **xfonts;
1861 char **font_names;
1862 int i, n;
1863
1864 *ascent = *descent = *lbearing = *rbearing = 0;
1865 n = XFontsOfFontSet(set, &xfonts, &font_names);
1866 for(i = 0; i < n; i++) {
1867 *ascent = MAX(*ascent, (*xfonts)->ascent);
1868 *descent = MAX(*descent, (*xfonts)->descent);
1869 *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
1870 *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
1871 xfonts++;
1872 }
1873 }
1874
1875 void
1876 initfonts(char *fontstr, char *bfontstr) {
1877 if((dc.font.set = xinitfont(fontstr)) == NULL ||
1878 (dc.bfont.set = xinitfont(bfontstr)) == NULL)
1879 die("Can't load font %s\n", dc.font.set ? BOLDFONT : FONT);
1880 xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
1881 &dc.font.lbearing, &dc.font.rbearing);
1882 xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
1883 &dc.bfont.lbearing, &dc.bfont.rbearing);
1884 }
1885
1886 void
1887 xinit(void) {
1888 XSetWindowAttributes attrs;
1889 Cursor cursor;
1890 Window parent;
1891
1892 if(!(xw.dpy = XOpenDisplay(NULL)))
1893 die("Can't open display\n");
1894 xw.scr = XDefaultScreen(xw.dpy);
1895
1896 /* font */
1897 initfonts(FONT, BOLDFONT);
1898
1899 /* XXX: Assuming same size for bold font */
1900 xw.cw = dc.font.rbearing - dc.font.lbearing;
1901 xw.ch = dc.font.ascent + dc.font.descent;
1902
1903 /* colors */
1904 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1905 xloadcols();
1906
1907 /* window - default size */
1908 xw.h = 2*BORDER + term.row * xw.ch;
1909 xw.w = 2*BORDER + term.col * xw.cw;
1910
1911 attrs.background_pixel = dc.col[DefaultBG];
1912 attrs.border_pixel = dc.col[DefaultBG];
1913 attrs.bit_gravity = NorthWestGravity;
1914 attrs.event_mask = FocusChangeMask | KeyPressMask
1915 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1916 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask
1917 | EnterWindowMask | LeaveWindowMask;
1918 attrs.colormap = xw.cmap;
1919
1920 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
1921 xw.win = XCreateWindow(xw.dpy, parent, 0, 0,
1922 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
1923 XDefaultVisual(xw.dpy, xw.scr),
1924 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
1925 | CWColormap,
1926 &attrs);
1927 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
1928
1929
1930 /* input methods */
1931 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
1932 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
1933 | XIMStatusNothing, XNClientWindow, xw.win,
1934 XNFocusWindow, xw.win, NULL);
1935 /* gc */
1936 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
1937
1938 /* white cursor, black outline */
1939 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
1940 XDefineCursor(xw.dpy, xw.win, cursor);
1941 XRecolorCursor(xw.dpy, cursor,
1942 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
1943 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
1944
1945 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
1946
1947 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
1948 XMapWindow(xw.dpy, xw.win);
1949 xhints();
1950 XSync(xw.dpy, 0);
1951 }
1952
1953 void
1954 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
1955 int fg = base.fg, bg = base.bg, temp;
1956 int winx = BORDER+x*xw.cw, winy = BORDER+y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
1957 XFontSet fontset = dc.font.set;
1958 int i;
1959
1960 /* only switch default fg/bg if term is in RV mode */
1961 if(IS_SET(MODE_REVERSE)) {
1962 if(fg == DefaultFG)
1963 fg = DefaultBG;
1964 if(bg == DefaultBG)
1965 bg = DefaultFG;
1966 }
1967
1968 if(base.mode & ATTR_REVERSE)
1969 temp = fg, fg = bg, bg = temp;
1970
1971 if(base.mode & ATTR_BOLD) {
1972 fg += 8;
1973 fontset = dc.bfont.set;
1974 }
1975
1976 XSetBackground(xw.dpy, dc.gc, dc.col[bg]);
1977 XSetForeground(xw.dpy, dc.gc, dc.col[fg]);
1978
1979 if(base.mode & ATTR_GFX) {
1980 for(i = 0; i < bytelen; i++) {
1981 char c = gfx[(uint)s[i] % 256];
1982 if(c)
1983 s[i] = c;
1984 else if(s[i] > 0x5f)
1985 s[i] -= 0x5f;
1986 }
1987 }
1988
1989 XmbDrawImageString(xw.dpy, xw.buf, fontset, dc.gc, winx, winy, s, bytelen);
1990
1991 if(base.mode & ATTR_UNDERLINE)
1992 XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1993 }
1994
1995 /* copy buffer pixmap to screen pixmap */
1996 void
1997 xcopy() {
1998 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
1999 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2000
2001 }
2002
2003 void
2004 xdrawcursor(void) {
2005 static int oldx = 0;
2006 static int oldy = 0;
2007 int sl;
2008 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
2009
2010 LIMIT(oldx, 0, term.col-1);
2011 LIMIT(oldy, 0, term.row-1);
2012
2013 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2014 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2015
2016 /* remove the old cursor */
2017 if(term.line[oldy][oldx].state & GLYPH_SET) {
2018 sl = utf8size(term.line[oldy][oldx].c);
2019 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
2020 } else
2021 xclear(oldx, oldy, oldx, oldy);
2022
2023 xcopy(oldx, oldy, 1, 1);
2024
2025 /* draw the new one */
2026 if(!(term.c.state & CURSOR_HIDE)) {
2027 if(!(xw.state & WIN_FOCUSED))
2028 g.bg = DefaultUCS;
2029
2030 if(IS_SET(MODE_REVERSE))
2031 g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
2032
2033 sl = utf8size(g.c);
2034 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2035 oldx = term.c.x, oldy = term.c.y;
2036 }
2037
2038 xcopy(term.c.x, term.c.y, 1, 1);
2039 }
2040
2041 void
2042 draw() {
2043 drawregion(0, 0, term.col, term.row);
2044 xcopy();
2045 gettimeofday(&xw.lastdraw, NULL);
2046 }
2047
2048 void
2049 drawregion(int x1, int y1, int x2, int y2) {
2050 int ic, ib, x, y, ox, sl;
2051 Glyph base, new;
2052 char buf[DRAW_BUF_SIZ];
2053
2054 if(!(xw.state & WIN_VISIBLE))
2055 return;
2056
2057 for(y = y1; y < y2; y++) {
2058 if(!term.dirty[y])
2059 continue;
2060 xclear(0, y, term.col, y);
2061 term.dirty[y] = 0;
2062 base = term.line[y][0];
2063 ic = ib = ox = 0;
2064 for(x = x1; x < x2; x++) {
2065 new = term.line[y][x];
2066 if(sel.bx != -1 && *(new.c) && selected(x, y))
2067 new.mode ^= ATTR_REVERSE;
2068 if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
2069 ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2070 xdraws(buf, base, ox, y, ic, ib);
2071 ic = ib = 0;
2072 }
2073 if(new.state & GLYPH_SET) {
2074 if(ib == 0) {
2075 ox = x;
2076 base = new;
2077 }
2078 sl = utf8size(new.c);
2079 memcpy(buf+ib, new.c, sl);
2080 ib += sl;
2081 ++ic;
2082 }
2083 }
2084 if(ib > 0)
2085 xdraws(buf, base, ox, y, ic, ib);
2086 }
2087 xdrawcursor();
2088 }
2089
2090 void
2091 expose(XEvent *ev) {
2092 XExposeEvent *e = &ev->xexpose;
2093 if(xw.state & WIN_REDRAW) {
2094 if(!e->count)
2095 xw.state &= ~WIN_REDRAW;
2096 }
2097 xcopy();
2098 }
2099
2100 void
2101 visibility(XEvent *ev) {
2102 XVisibilityEvent *e = &ev->xvisibility;
2103 if(e->state == VisibilityFullyObscured)
2104 xw.state &= ~WIN_VISIBLE;
2105 else if(!(xw.state & WIN_VISIBLE))
2106 /* need a full redraw for next Expose, not just a buf copy */
2107 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2108 }
2109
2110 void
2111 unmap(XEvent *ev) {
2112 xw.state &= ~WIN_VISIBLE;
2113 }
2114
2115 void
2116 xseturgency(int add) {
2117 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2118 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2119 XSetWMHints(xw.dpy, xw.win, h);
2120 XFree(h);
2121 }
2122
2123 void
2124 focus(XEvent *ev) {
2125 if(ev->type == FocusIn) {
2126 xw.state |= WIN_FOCUSED;
2127 xseturgency(0);
2128 } else
2129 xw.state &= ~WIN_FOCUSED;
2130 draw();
2131 }
2132
2133 char*
2134 kmap(KeySym k, uint state) {
2135 int i;
2136 state &= ~Mod2Mask;
2137 for(i = 0; i < LEN(key); i++) {
2138 uint mask = key[i].mask;
2139 if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
2140 return (char*)key[i].s;
2141 }
2142 return NULL;
2143 }
2144
2145 void
2146 kpress(XEvent *ev) {
2147 XKeyEvent *e = &ev->xkey;
2148 KeySym ksym;
2149 char buf[32];
2150 char *customkey;
2151 int len;
2152 int meta;
2153 int shift;
2154 Status status;
2155
2156 meta = e->state & Mod1Mask;
2157 shift = e->state & ShiftMask;
2158 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
2159
2160 /* 1. custom keys from config.h */
2161 if((customkey = kmap(ksym, e->state)))
2162 ttywrite(customkey, strlen(customkey));
2163 /* 2. hardcoded (overrides X lookup) */
2164 else
2165 switch(ksym) {
2166 case XK_Up:
2167 case XK_Down:
2168 case XK_Left:
2169 case XK_Right:
2170 /* XXX: shift up/down doesn't work */
2171 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
2172 ttywrite(buf, 3);
2173 break;
2174 case XK_Insert:
2175 if(shift)
2176 selpaste();
2177 break;
2178 case XK_Return:
2179 if(IS_SET(MODE_CRLF))
2180 ttywrite("\r\n", 2);
2181 else
2182 ttywrite("\r", 1);
2183 break;
2184 /* 3. X lookup */
2185 default:
2186 if(len > 0) {
2187 if(meta && len == 1)
2188 ttywrite("\033", 1);
2189 ttywrite(buf, len);
2190 }
2191 break;
2192 }
2193 }
2194
2195 void
2196 cmessage(XEvent *e) {
2197 /* See xembed specs
2198 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2199 if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2200 if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2201 xw.state |= WIN_FOCUSED;
2202 xseturgency(0);
2203 } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2204 xw.state &= ~WIN_FOCUSED;
2205 }
2206 draw();
2207 }
2208 }
2209
2210 void
2211 resize(XEvent *e) {
2212 int col, row;
2213
2214 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2215 return;
2216
2217 xw.w = e->xconfigure.width;
2218 xw.h = e->xconfigure.height;
2219 col = (xw.w - 2*BORDER) / xw.cw;
2220 row = (xw.h - 2*BORDER) / xw.ch;
2221 if(col == term.col && row == term.row)
2222 return;
2223 if(tresize(col, row))
2224 draw();
2225 ttyresize(col, row);
2226 xresize(col, row);
2227 }
2228
2229 bool
2230 last_draw_too_old(void) {
2231 struct timeval now;
2232 gettimeofday(&now, NULL);
2233 return TIMEDIFF(now, xw.lastdraw) >= DRAW_TIMEOUT/1000;
2234 }
2235
2236 void
2237 run(void) {
2238 XEvent ev;
2239 fd_set rfd;
2240 int xfd = XConnectionNumber(xw.dpy);
2241 struct timeval timeout = {0};
2242 bool stuff_to_print = 0;
2243
2244 for(;;) {
2245 FD_ZERO(&rfd);
2246 FD_SET(cmdfd, &rfd);
2247 FD_SET(xfd, &rfd);
2248 timeout.tv_sec = 0;
2249 timeout.tv_usec = SELECT_TIMEOUT;
2250 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, &timeout) < 0) {
2251 if(errno == EINTR)
2252 continue;
2253 die("select failed: %s\n", SERRNO);
2254 }
2255 if(FD_ISSET(cmdfd, &rfd)) {
2256 ttyread();
2257 stuff_to_print = 1;
2258 }
2259
2260 if(stuff_to_print && last_draw_too_old()) {
2261 stuff_to_print = 0;
2262 draw();
2263 }
2264
2265 while(XPending(xw.dpy)) {
2266 XNextEvent(xw.dpy, &ev);
2267 if(XFilterEvent(&ev, xw.win))
2268 continue;
2269 if(handler[ev.type])
2270 (handler[ev.type])(&ev);
2271 }
2272 }
2273 }
2274
2275 int
2276 main(int argc, char *argv[]) {
2277 int i;
2278
2279 for(i = 1; i < argc; i++) {
2280 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2281 case 't':
2282 if(++i < argc) opt_title = argv[i];
2283 break;
2284 case 'c':
2285 if(++i < argc) opt_class = argv[i];
2286 break;
2287 case 'w':
2288 if(++i < argc) opt_embed = argv[i];
2289 break;
2290 case 'e':
2291 /* eat every remaining arguments */
2292 if(++i < argc) opt_cmd = &argv[i];
2293 goto run;
2294 case 'v':
2295 default:
2296 die(USAGE);
2297 }
2298 }
2299
2300 run:
2301 setlocale(LC_CTYPE, "");
2302 tnew(80, 24);
2303 ttynew();
2304 xinit();
2305 selinit();
2306 run();
2307 return 0;
2308 }