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09b0262b553affc78854aff294003df0c0c5f6d1
[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] [-g geometry]" \
40 " [-w windowid] [-v] [-f file] [-e command...]\n"
41
42 /* XEMBED messages */
43 #define XEMBED_FOCUS_IN 4
44 #define XEMBED_FOCUS_OUT 5
45
46 /* Arbitrary sizes */
47 #define ESC_BUF_SIZ 256
48 #define ESC_ARG_SIZ 16
49 #define STR_BUF_SIZ 256
50 #define STR_ARG_SIZ 16
51 #define DRAW_BUF_SIZ 1024
52 #define UTF_SIZ 4
53 #define XK_NO_MOD UINT_MAX
54 #define XK_ANY_MOD 0
55
56 #define SELECT_TIMEOUT (20*1000) /* 20 ms */
57 #define DRAW_TIMEOUT (20*1000) /* 20 ms */
58 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
59
60 #define SERRNO strerror(errno)
61 #define MIN(a, b) ((a) < (b) ? (a) : (b))
62 #define MAX(a, b) ((a) < (b) ? (b) : (a))
63 #define LEN(a) (sizeof(a) / sizeof(a[0]))
64 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
65 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
66 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
67 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
68 #define IS_SET(flag) (term.mode & (flag))
69 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
70 #define X2COL(x) (((x) - BORDER)/xw.cw)
71 #define Y2ROW(y) (((y) - BORDER)/xw.ch)
72
73 enum glyph_attribute {
74 ATTR_NULL = 0,
75 ATTR_REVERSE = 1,
76 ATTR_UNDERLINE = 2,
77 ATTR_BOLD = 4,
78 ATTR_GFX = 8,
79 };
80
81 enum cursor_movement {
82 CURSOR_UP,
83 CURSOR_DOWN,
84 CURSOR_LEFT,
85 CURSOR_RIGHT,
86 CURSOR_SAVE,
87 CURSOR_LOAD
88 };
89
90 enum cursor_state {
91 CURSOR_DEFAULT = 0,
92 CURSOR_HIDE = 1,
93 CURSOR_WRAPNEXT = 2
94 };
95
96 enum glyph_state {
97 GLYPH_SET = 1,
98 GLYPH_DIRTY = 2
99 };
100
101 enum term_mode {
102 MODE_WRAP = 1,
103 MODE_INSERT = 2,
104 MODE_APPKEYPAD = 4,
105 MODE_ALTSCREEN = 8,
106 MODE_CRLF = 16,
107 MODE_MOUSEBTN = 32,
108 MODE_MOUSEMOTION = 64,
109 MODE_MOUSE = 32|64,
110 MODE_REVERSE = 128
111 };
112
113 enum escape_state {
114 ESC_START = 1,
115 ESC_CSI = 2,
116 ESC_STR = 4, /* DSC, OSC, PM, APC */
117 ESC_ALTCHARSET = 8,
118 ESC_STR_END = 16, /* a final string was encountered */
119 };
120
121 enum window_state {
122 WIN_VISIBLE = 1,
123 WIN_REDRAW = 2,
124 WIN_FOCUSED = 4
125 };
126
127 /* bit macro */
128 #undef B0
129 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
130
131 typedef unsigned char uchar;
132 typedef unsigned int uint;
133 typedef unsigned long ulong;
134 typedef unsigned short ushort;
135
136 typedef struct {
137 char c[UTF_SIZ]; /* character code */
138 uchar mode; /* attribute flags */
139 ushort fg; /* foreground */
140 ushort bg; /* background */
141 uchar state; /* state flags */
142 } Glyph;
143
144 typedef Glyph* Line;
145
146 typedef struct {
147 Glyph attr; /* current char attributes */
148 int x;
149 int y;
150 char state;
151 } TCursor;
152
153 /* CSI Escape sequence structs */
154 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
155 typedef struct {
156 char buf[ESC_BUF_SIZ]; /* raw string */
157 int len; /* raw string length */
158 char priv;
159 int arg[ESC_ARG_SIZ];
160 int narg; /* nb of args */
161 char mode;
162 } CSIEscape;
163
164 /* STR Escape sequence structs */
165 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
166 typedef struct {
167 char type; /* ESC type ... */
168 char buf[STR_BUF_SIZ]; /* raw string */
169 int len; /* raw string length */
170 char *args[STR_ARG_SIZ];
171 int narg; /* nb of args */
172 } STREscape;
173
174 /* Internal representation of the screen */
175 typedef struct {
176 int row; /* nb row */
177 int col; /* nb col */
178 Line* line; /* screen */
179 Line* alt; /* alternate screen */
180 bool* dirty; /* dirtyness of lines */
181 TCursor c; /* cursor */
182 int top; /* top scroll limit */
183 int bot; /* bottom scroll limit */
184 int mode; /* terminal mode flags */
185 int esc; /* escape state flags */
186 bool *tabs;
187 } Term;
188
189 /* Purely graphic info */
190 typedef struct {
191 Display* dpy;
192 Colormap cmap;
193 Window win;
194 XdbeBackBuffer buf;
195 Atom xembed;
196 XIM xim;
197 XIC xic;
198 int scr;
199 Bool isfixed; /* is fixed geometry? */
200 int fx, fy, fw, fh; /* fixed geometry */
201 int w; /* window width */
202 int h; /* window height */
203 int ch; /* char height */
204 int cw; /* char width */
205 char state; /* focus, redraw, visible */
206 struct timeval lastdraw;
207 } XWindow;
208
209 typedef struct {
210 KeySym k;
211 uint mask;
212 char s[ESC_BUF_SIZ];
213 } Key;
214
215
216 /* TODO: use better name for vars... */
217 typedef struct {
218 int mode;
219 int bx, by;
220 int ex, ey;
221 struct {int x, y;} b, e;
222 char *clip;
223 Atom xtarget;
224 struct timeval tclick1;
225 struct timeval tclick2;
226 } Selection;
227
228 #include "config.h"
229
230 /* Drawing Context */
231 typedef struct {
232 ulong col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
233 GC gc;
234 struct {
235 int ascent;
236 int descent;
237 short lbearing;
238 short rbearing;
239 XFontSet set;
240 } font, bfont;
241 } DC;
242
243 static void die(const char*, ...);
244 static void draw(void);
245 static void redraw(void);
246 static void drawregion(int, int, int, int);
247 static void execsh(void);
248 static void sigchld(int);
249 static void run(void);
250 static bool last_draw_too_old(void);
251
252 static void csidump(void);
253 static void csihandle(void);
254 static void csiparse(void);
255 static void csireset(void);
256 static void strdump(void);
257 static void strhandle(void);
258 static void strparse(void);
259 static void strreset(void);
260
261 static void tclearregion(int, int, int, int);
262 static void tcursor(int);
263 static void tdeletechar(int);
264 static void tdeleteline(int);
265 static void tinsertblank(int);
266 static void tinsertblankline(int);
267 static void tmoveto(int, int);
268 static void tnew(int, int);
269 static void tnewline(int);
270 static void tputtab(bool);
271 static void tputc(char*);
272 static void treset(void);
273 static int tresize(int, int);
274 static void tscrollup(int, int);
275 static void tscrolldown(int, int);
276 static void tsetattr(int*, int);
277 static void tsetchar(char*);
278 static void tsetscroll(int, int);
279 static void tswapscreen(void);
280 static void tsetdirt(int, int);
281 static void tsetmode(bool, bool, int *, int);
282 static void tfulldirt(void);
283
284 static void ttynew(void);
285 static void ttyread(void);
286 static void ttyresize(int, int);
287 static void ttywrite(const char *, size_t);
288
289 static void xdraws(char *, Glyph, int, int, int, int);
290 static void xhints(void);
291 static void xclear(int, int, int, int);
292 static void xcopy();
293 static void xdrawcursor(void);
294 static void xinit(void);
295 static void xloadcols(void);
296 static void xseturgency(int);
297 static void xsetsel(char*);
298 static void xresize(int, int);
299
300 static void expose(XEvent *);
301 static void visibility(XEvent *);
302 static void unmap(XEvent *);
303 static char* kmap(KeySym, uint);
304 static void kpress(XEvent *);
305 static void cmessage(XEvent *);
306 static void resize(XEvent *);
307 static void focus(XEvent *);
308 static void brelease(XEvent *);
309 static void bpress(XEvent *);
310 static void bmotion(XEvent *);
311 static void selnotify(XEvent *);
312 static void selrequest(XEvent *);
313
314 static void selinit(void);
315 static inline bool selected(int, int);
316 static void selcopy(void);
317 static void selpaste();
318 static void selscroll(int, int);
319
320 static int utf8decode(char *, long *);
321 static int utf8encode(long *, char *);
322 static int utf8size(char *);
323 static int isfullutf8(char *, int);
324
325 static void (*handler[LASTEvent])(XEvent *) = {
326 [KeyPress] = kpress,
327 [ClientMessage] = cmessage,
328 [ConfigureNotify] = resize,
329 [VisibilityNotify] = visibility,
330 [UnmapNotify] = unmap,
331 [Expose] = expose,
332 [FocusIn] = focus,
333 [FocusOut] = focus,
334 [MotionNotify] = bmotion,
335 [ButtonPress] = bpress,
336 [ButtonRelease] = brelease,
337 [SelectionNotify] = selnotify,
338 [SelectionRequest] = selrequest,
339 };
340
341 /* Globals */
342 static DC dc;
343 static XWindow xw;
344 static Term term;
345 static CSIEscape csiescseq;
346 static STREscape strescseq;
347 static int cmdfd;
348 static pid_t pid;
349 static Selection sel;
350 static FILE *fileio;
351 static char **opt_cmd = NULL;
352 static char *opt_io = NULL;
353 static char *opt_title = NULL;
354 static char *opt_embed = NULL;
355 static char *opt_class = NULL;
356
357 int
358 utf8decode(char *s, long *u) {
359 uchar c;
360 int i, n, rtn;
361
362 rtn = 1;
363 c = *s;
364 if(~c & B7) { /* 0xxxxxxx */
365 *u = c;
366 return rtn;
367 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
368 *u = c&(B4|B3|B2|B1|B0);
369 n = 1;
370 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
371 *u = c&(B3|B2|B1|B0);
372 n = 2;
373 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
374 *u = c & (B2|B1|B0);
375 n = 3;
376 } else
377 goto invalid;
378 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
379 c = *s;
380 if((c & (B7|B6)) != B7) /* 10xxxxxx */
381 goto invalid;
382 *u <<= 6;
383 *u |= c & (B5|B4|B3|B2|B1|B0);
384 }
385 if((n == 1 && *u < 0x80) ||
386 (n == 2 && *u < 0x800) ||
387 (n == 3 && *u < 0x10000) ||
388 (*u >= 0xD800 && *u <= 0xDFFF))
389 goto invalid;
390 return rtn;
391 invalid:
392 *u = 0xFFFD;
393 return rtn;
394 }
395
396 int
397 utf8encode(long *u, char *s) {
398 uchar *sp;
399 ulong uc;
400 int i, n;
401
402 sp = (uchar*) s;
403 uc = *u;
404 if(uc < 0x80) {
405 *sp = uc; /* 0xxxxxxx */
406 return 1;
407 } else if(*u < 0x800) {
408 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
409 n = 1;
410 } else if(uc < 0x10000) {
411 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
412 n = 2;
413 } else if(uc <= 0x10FFFF) {
414 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
415 n = 3;
416 } else {
417 goto invalid;
418 }
419 for(i=n,++sp; i>0; --i,++sp)
420 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
421 return n+1;
422 invalid:
423 /* U+FFFD */
424 *s++ = '\xEF';
425 *s++ = '\xBF';
426 *s = '\xBD';
427 return 3;
428 }
429
430 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
431 UTF-8 otherwise return 0 */
432 int
433 isfullutf8(char *s, int b) {
434 uchar *c1, *c2, *c3;
435
436 c1 = (uchar *) s;
437 c2 = (uchar *) ++s;
438 c3 = (uchar *) ++s;
439 if(b < 1)
440 return 0;
441 else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
442 return 0;
443 else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
444 ((b == 1) ||
445 ((b == 2) && (*c2&(B7|B6)) == B7)))
446 return 0;
447 else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
448 ((b == 1) ||
449 ((b == 2) && (*c2&(B7|B6)) == B7) ||
450 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7)))
451 return 0;
452 else
453 return 1;
454 }
455
456 int
457 utf8size(char *s) {
458 uchar c = *s;
459
460 if(~c&B7)
461 return 1;
462 else if((c&(B7|B6|B5)) == (B7|B6))
463 return 2;
464 else if((c&(B7|B6|B5|B4)) == (B7|B6|B5))
465 return 3;
466 else
467 return 4;
468 }
469
470 void
471 selinit(void) {
472 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
473 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
474 sel.mode = 0;
475 sel.bx = -1;
476 sel.clip = NULL;
477 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
478 if(sel.xtarget == None)
479 sel.xtarget = XA_STRING;
480 }
481
482 static inline bool
483 selected(int x, int y) {
484 if(sel.ey == y && sel.by == y) {
485 int bx = MIN(sel.bx, sel.ex);
486 int ex = MAX(sel.bx, sel.ex);
487 return BETWEEN(x, bx, ex);
488 }
489 return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
490 || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
491 }
492
493 void
494 getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
495 if(b)
496 *b = e->xbutton.button;
497
498 *x = X2COL(e->xbutton.x);
499 *y = Y2ROW(e->xbutton.y);
500 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
501 sel.b.y = MIN(sel.by, sel.ey);
502 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
503 sel.e.y = MAX(sel.by, sel.ey);
504 }
505
506 void
507 mousereport(XEvent *e) {
508 int x = X2COL(e->xbutton.x);
509 int y = Y2ROW(e->xbutton.y);
510 int button = e->xbutton.button;
511 int state = e->xbutton.state;
512 char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
513 static int ob, ox, oy;
514
515 /* from urxvt */
516 if(e->xbutton.type == MotionNotify) {
517 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
518 return;
519 button = ob + 32;
520 ox = x, oy = y;
521 } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
522 button = 3;
523 } else {
524 button -= Button1;
525 if(button >= 3)
526 button += 64 - 3;
527 if(e->xbutton.type == ButtonPress) {
528 ob = button;
529 ox = x, oy = y;
530 }
531 }
532
533 buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
534 + (state & Mod4Mask ? 8 : 0)
535 + (state & ControlMask ? 16 : 0);
536
537 ttywrite(buf, sizeof(buf));
538 }
539
540 void
541 bpress(XEvent *e) {
542 if(IS_SET(MODE_MOUSE))
543 mousereport(e);
544 else if(e->xbutton.button == Button1) {
545 if(sel.bx != -1)
546 tsetdirt(sel.b.y, sel.e.y);
547 sel.mode = 1;
548 sel.ex = sel.bx = X2COL(e->xbutton.x);
549 sel.ey = sel.by = Y2ROW(e->xbutton.y);
550 }
551 }
552
553 void
554 selcopy(void) {
555 char *str, *ptr;
556 int x, y, bufsize, is_selected = 0;
557
558 if(sel.bx == -1)
559 str = NULL;
560
561 else {
562 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
563 ptr = str = malloc(bufsize);
564
565 /* append every set & selected glyph to the selection */
566 for(y = 0; y < term.row; y++) {
567 for(x = 0; x < term.col; x++) {
568 is_selected = selected(x, y);
569 if((term.line[y][x].state & GLYPH_SET) && is_selected) {
570 int size = utf8size(term.line[y][x].c);
571 memcpy(ptr, term.line[y][x].c, size);
572 ptr += size;
573 }
574 }
575
576 /* \n at the end of every selected line except for the last one */
577 if(is_selected && y < sel.e.y)
578 *ptr++ = '\n';
579 }
580 *ptr = 0;
581 }
582 xsetsel(str);
583 }
584
585 void
586 selnotify(XEvent *e) {
587 ulong nitems, ofs, rem;
588 int format;
589 uchar *data;
590 Atom type;
591
592 ofs = 0;
593 do {
594 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
595 False, AnyPropertyType, &type, &format,
596 &nitems, &rem, &data)) {
597 fprintf(stderr, "Clipboard allocation failed\n");
598 return;
599 }
600 ttywrite((const char *) data, nitems * format / 8);
601 XFree(data);
602 /* number of 32-bit chunks returned */
603 ofs += nitems * format / 32;
604 } while(rem > 0);
605 }
606
607 void
608 selpaste() {
609 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY, xw.win, CurrentTime);
610 }
611
612 void
613 selrequest(XEvent *e) {
614 XSelectionRequestEvent *xsre;
615 XSelectionEvent xev;
616 Atom xa_targets;
617
618 xsre = (XSelectionRequestEvent *) e;
619 xev.type = SelectionNotify;
620 xev.requestor = xsre->requestor;
621 xev.selection = xsre->selection;
622 xev.target = xsre->target;
623 xev.time = xsre->time;
624 /* reject */
625 xev.property = None;
626
627 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
628 if(xsre->target == xa_targets) {
629 /* respond with the supported type */
630 Atom string = sel.xtarget;
631 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
632 XA_ATOM, 32, PropModeReplace,
633 (uchar *) &string, 1);
634 xev.property = xsre->property;
635 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
636 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
637 xsre->target, 8, PropModeReplace,
638 (uchar *) sel.clip, strlen(sel.clip));
639 xev.property = xsre->property;
640 }
641
642 /* all done, send a notification to the listener */
643 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
644 fprintf(stderr, "Error sending SelectionNotify event\n");
645 }
646
647 void
648 xsetsel(char *str) {
649 /* register the selection for both the clipboard and the primary */
650 Atom clipboard;
651
652 free(sel.clip);
653 sel.clip = str;
654
655 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
656
657 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
658 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
659
660 XFlush(xw.dpy);
661 }
662
663 void
664 brelease(XEvent *e) {
665 if(IS_SET(MODE_MOUSE)) {
666 mousereport(e);
667 return;
668 }
669 if(e->xbutton.button == Button2)
670 selpaste();
671 else if(e->xbutton.button == Button1) {
672 sel.mode = 0;
673 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
674 term.dirty[sel.ey] = 1;
675 if(sel.bx == sel.ex && sel.by == sel.ey) {
676 struct timeval now;
677 sel.bx = -1;
678 gettimeofday(&now, NULL);
679
680 if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
681 /* triple click on the line */
682 sel.b.x = sel.bx = 0;
683 sel.e.x = sel.ex = term.col;
684 sel.b.y = sel.e.y = sel.ey;
685 selcopy();
686 } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
687 /* double click to select word */
688 sel.bx = sel.ex;
689 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
690 term.line[sel.ey][sel.bx-1].c[0] != ' ') sel.bx--;
691 sel.b.x = sel.bx;
692 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
693 term.line[sel.ey][sel.ex+1].c[0] != ' ') sel.ex++;
694 sel.e.x = sel.ex;
695 sel.b.y = sel.e.y = sel.ey;
696 selcopy();
697 }
698 } else
699 selcopy();
700 }
701 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
702 gettimeofday(&sel.tclick1, NULL);
703 draw();
704 }
705
706 void
707 bmotion(XEvent *e) {
708 if(IS_SET(MODE_MOUSE)) {
709 mousereport(e);
710 return;
711 }
712 if(sel.mode) {
713 int oldey = sel.ey, oldex = sel.ex;
714 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
715
716 if(oldey != sel.ey || oldex != sel.ex) {
717 int starty = MIN(oldey, sel.ey);
718 int endy = MAX(oldey, sel.ey);
719 tsetdirt(starty, endy);
720 draw();
721 }
722 }
723 }
724
725 void
726 die(const char *errstr, ...) {
727 va_list ap;
728
729 va_start(ap, errstr);
730 vfprintf(stderr, errstr, ap);
731 va_end(ap);
732 exit(EXIT_FAILURE);
733 }
734
735 void
736 execsh(void) {
737 char **args;
738 char *envshell = getenv("SHELL");
739
740 DEFAULT(envshell, SHELL);
741 putenv("TERM="TNAME);
742 args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
743 execvp(args[0], args);
744 exit(EXIT_FAILURE);
745 }
746
747 void
748 sigchld(int a) {
749 int stat = 0;
750 if(waitpid(pid, &stat, 0) < 0)
751 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
752 if(WIFEXITED(stat))
753 exit(WEXITSTATUS(stat));
754 else
755 exit(EXIT_FAILURE);
756 }
757
758 void
759 ttynew(void) {
760 int m, s;
761
762 /* seems to work fine on linux, openbsd and freebsd */
763 struct winsize w = {term.row, term.col, 0, 0};
764 if(openpty(&m, &s, NULL, NULL, &w) < 0)
765 die("openpty failed: %s\n", SERRNO);
766
767 switch(pid = fork()) {
768 case -1:
769 die("fork failed\n");
770 break;
771 case 0:
772 setsid(); /* create a new process group */
773 dup2(s, STDIN_FILENO);
774 dup2(s, STDOUT_FILENO);
775 dup2(s, STDERR_FILENO);
776 if(ioctl(s, TIOCSCTTY, NULL) < 0)
777 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
778 close(s);
779 close(m);
780 execsh();
781 break;
782 default:
783 close(s);
784 cmdfd = m;
785 signal(SIGCHLD, sigchld);
786 if (opt_io && !(fileio = fopen(opt_io, "w"))) {
787 fprintf(stderr, "Error opening %s:%s",
788 opt_io, strerror(errno));
789 }
790 }
791 }
792
793 void
794 dump(char c) {
795 static int col;
796 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
797 if(++col % 10 == 0)
798 fprintf(stderr, "\n");
799 }
800
801 void
802 ttyread(void) {
803 static char buf[BUFSIZ];
804 static int buflen = 0;
805 char *ptr;
806 char s[UTF_SIZ];
807 int charsize; /* size of utf8 char in bytes */
808 long utf8c;
809 int ret;
810
811 /* append read bytes to unprocessed bytes */
812 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
813 die("Couldn't read from shell: %s\n", SERRNO);
814
815 /* process every complete utf8 char */
816 buflen += ret;
817 ptr = buf;
818 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
819 charsize = utf8decode(ptr, &utf8c);
820 utf8encode(&utf8c, s);
821 tputc(s);
822 ptr += charsize;
823 buflen -= charsize;
824 }
825
826 /* keep any uncomplete utf8 char for the next call */
827 memmove(buf, ptr, buflen);
828 }
829
830 void
831 ttywrite(const char *s, size_t n) {
832 if(write(cmdfd, s, n) == -1)
833 die("write error on tty: %s\n", SERRNO);
834 }
835
836 void
837 ttyresize(int x, int y) {
838 struct winsize w;
839
840 w.ws_row = term.row;
841 w.ws_col = term.col;
842 w.ws_xpixel = w.ws_ypixel = 0;
843 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
844 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
845 }
846
847 void
848 tsetdirt(int top, int bot)
849 {
850 int i;
851
852 LIMIT(top, 0, term.row-1);
853 LIMIT(bot, 0, term.row-1);
854
855 for(i = top; i <= bot; i++)
856 term.dirty[i] = 1;
857 }
858
859 void
860 tfulldirt(void)
861 {
862 tsetdirt(0, term.row-1);
863 }
864
865 void
866 tcursor(int mode) {
867 static TCursor c;
868
869 if(mode == CURSOR_SAVE)
870 c = term.c;
871 else if(mode == CURSOR_LOAD)
872 term.c = c, tmoveto(c.x, c.y);
873 }
874
875 void
876 treset(void) {
877 unsigned i;
878 term.c = (TCursor){{
879 .mode = ATTR_NULL,
880 .fg = DefaultFG,
881 .bg = DefaultBG
882 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
883
884 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
885 for (i = TAB; i < term.col; i += TAB)
886 term.tabs[i] = 1;
887 term.top = 0, term.bot = term.row - 1;
888 term.mode = MODE_WRAP;
889 tclearregion(0, 0, term.col-1, term.row-1);
890 }
891
892 void
893 tnew(int col, int row) {
894 /* set screen size */
895 term.row = row, term.col = col;
896 term.line = malloc(term.row * sizeof(Line));
897 term.alt = malloc(term.row * sizeof(Line));
898 term.dirty = malloc(term.row * sizeof(*term.dirty));
899 term.tabs = malloc(term.col * sizeof(*term.tabs));
900
901 for(row = 0; row < term.row; row++) {
902 term.line[row] = malloc(term.col * sizeof(Glyph));
903 term.alt [row] = malloc(term.col * sizeof(Glyph));
904 term.dirty[row] = 0;
905 }
906 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
907 /* setup screen */
908 treset();
909 }
910
911 void
912 tswapscreen(void) {
913 Line* tmp = term.line;
914 term.line = term.alt;
915 term.alt = tmp;
916 term.mode ^= MODE_ALTSCREEN;
917 tfulldirt();
918 }
919
920 void
921 tscrolldown(int orig, int n) {
922 int i;
923 Line temp;
924
925 LIMIT(n, 0, term.bot-orig+1);
926
927 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
928
929 for(i = term.bot; i >= orig+n; i--) {
930 temp = term.line[i];
931 term.line[i] = term.line[i-n];
932 term.line[i-n] = temp;
933
934 term.dirty[i] = 1;
935 term.dirty[i-n] = 1;
936 }
937
938 selscroll(orig, n);
939 }
940
941 void
942 tscrollup(int orig, int n) {
943 int i;
944 Line temp;
945 LIMIT(n, 0, term.bot-orig+1);
946
947 tclearregion(0, orig, term.col-1, orig+n-1);
948
949 for(i = orig; i <= term.bot-n; i++) {
950 temp = term.line[i];
951 term.line[i] = term.line[i+n];
952 term.line[i+n] = temp;
953
954 term.dirty[i] = 1;
955 term.dirty[i+n] = 1;
956 }
957
958 selscroll(orig, -n);
959 }
960
961 void
962 selscroll(int orig, int n) {
963 if(sel.bx == -1)
964 return;
965
966 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
967 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
968 sel.bx = -1;
969 return;
970 }
971 if(sel.by < term.top) {
972 sel.by = term.top;
973 sel.bx = 0;
974 }
975 if(sel.ey > term.bot) {
976 sel.ey = term.bot;
977 sel.ex = term.col;
978 }
979 sel.b.y = sel.by, sel.b.x = sel.bx;
980 sel.e.y = sel.ey, sel.e.x = sel.ex;
981 }
982 }
983
984 void
985 tnewline(int first_col) {
986 int y = term.c.y;
987 if(y == term.bot)
988 tscrollup(term.top, 1);
989 else
990 y++;
991 tmoveto(first_col ? 0 : term.c.x, y);
992 }
993
994 void
995 csiparse(void) {
996 /* int noarg = 1; */
997 char *p = csiescseq.buf;
998
999 csiescseq.narg = 0;
1000 if(*p == '?')
1001 csiescseq.priv = 1, p++;
1002
1003 while(p < csiescseq.buf+csiescseq.len) {
1004 while(isdigit(*p)) {
1005 csiescseq.arg[csiescseq.narg] *= 10;
1006 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1007 }
1008 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ)
1009 csiescseq.narg++, p++;
1010 else {
1011 csiescseq.mode = *p;
1012 csiescseq.narg++;
1013 return;
1014 }
1015 }
1016 }
1017
1018 void
1019 tmoveto(int x, int y) {
1020 LIMIT(x, 0, term.col-1);
1021 LIMIT(y, 0, term.row-1);
1022 term.c.state &= ~CURSOR_WRAPNEXT;
1023 term.c.x = x;
1024 term.c.y = y;
1025 }
1026
1027 void
1028 tsetchar(char *c) {
1029 term.dirty[term.c.y] = 1;
1030 term.line[term.c.y][term.c.x] = term.c.attr;
1031 memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
1032 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
1033 }
1034
1035 void
1036 tclearregion(int x1, int y1, int x2, int y2) {
1037 int x, y, temp;
1038
1039 if(x1 > x2)
1040 temp = x1, x1 = x2, x2 = temp;
1041 if(y1 > y2)
1042 temp = y1, y1 = y2, y2 = temp;
1043
1044 LIMIT(x1, 0, term.col-1);
1045 LIMIT(x2, 0, term.col-1);
1046 LIMIT(y1, 0, term.row-1);
1047 LIMIT(y2, 0, term.row-1);
1048
1049 for(y = y1; y <= y2; y++) {
1050 term.dirty[y] = 1;
1051 for(x = x1; x <= x2; x++)
1052 term.line[y][x].state = 0;
1053 }
1054 }
1055
1056 void
1057 tdeletechar(int n) {
1058 int src = term.c.x + n;
1059 int dst = term.c.x;
1060 int size = term.col - src;
1061
1062 term.dirty[term.c.y] = 1;
1063
1064 if(src >= term.col) {
1065 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1066 return;
1067 }
1068 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1069 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1070 }
1071
1072 void
1073 tinsertblank(int n) {
1074 int src = term.c.x;
1075 int dst = src + n;
1076 int size = term.col - dst;
1077
1078 term.dirty[term.c.y] = 1;
1079
1080 if(dst >= term.col) {
1081 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1082 return;
1083 }
1084 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1085 tclearregion(src, term.c.y, dst - 1, term.c.y);
1086 }
1087
1088 void
1089 tinsertblankline(int n) {
1090 if(term.c.y < term.top || term.c.y > term.bot)
1091 return;
1092
1093 tscrolldown(term.c.y, n);
1094 }
1095
1096 void
1097 tdeleteline(int n) {
1098 if(term.c.y < term.top || term.c.y > term.bot)
1099 return;
1100
1101 tscrollup(term.c.y, n);
1102 }
1103
1104 void
1105 tsetattr(int *attr, int l) {
1106 int i;
1107
1108 for(i = 0; i < l; i++) {
1109 switch(attr[i]) {
1110 case 0:
1111 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
1112 term.c.attr.fg = DefaultFG;
1113 term.c.attr.bg = DefaultBG;
1114 break;
1115 case 1:
1116 term.c.attr.mode |= ATTR_BOLD;
1117 break;
1118 case 3: /* enter standout (highlight) mode TODO: make it italic */
1119 term.c.attr.mode |= ATTR_REVERSE;
1120 break;
1121 case 4:
1122 term.c.attr.mode |= ATTR_UNDERLINE;
1123 break;
1124 case 7:
1125 term.c.attr.mode |= ATTR_REVERSE;
1126 break;
1127 case 22:
1128 term.c.attr.mode &= ~ATTR_BOLD;
1129 break;
1130 case 23: /* leave standout (highlight) mode TODO: make it italic */
1131 term.c.attr.mode &= ~ATTR_REVERSE;
1132 break;
1133 case 24:
1134 term.c.attr.mode &= ~ATTR_UNDERLINE;
1135 break;
1136 case 27:
1137 term.c.attr.mode &= ~ATTR_REVERSE;
1138 break;
1139 case 38:
1140 if(i + 2 < l && attr[i + 1] == 5) {
1141 i += 2;
1142 if(BETWEEN(attr[i], 0, 255))
1143 term.c.attr.fg = attr[i];
1144 else
1145 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
1146 }
1147 else
1148 fprintf(stderr, "erresc(38): gfx attr %d unknown\n", attr[i]);
1149 break;
1150 case 39:
1151 term.c.attr.fg = DefaultFG;
1152 break;
1153 case 48:
1154 if(i + 2 < l && attr[i + 1] == 5) {
1155 i += 2;
1156 if(BETWEEN(attr[i], 0, 255))
1157 term.c.attr.bg = attr[i];
1158 else
1159 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
1160 }
1161 else
1162 fprintf(stderr, "erresc(48): gfx attr %d unknown\n", attr[i]);
1163 break;
1164 case 49:
1165 term.c.attr.bg = DefaultBG;
1166 break;
1167 default:
1168 if(BETWEEN(attr[i], 30, 37))
1169 term.c.attr.fg = attr[i] - 30;
1170 else if(BETWEEN(attr[i], 40, 47))
1171 term.c.attr.bg = attr[i] - 40;
1172 else if(BETWEEN(attr[i], 90, 97))
1173 term.c.attr.fg = attr[i] - 90 + 8;
1174 else if(BETWEEN(attr[i], 100, 107))
1175 term.c.attr.fg = attr[i] - 100 + 8;
1176 else
1177 fprintf(stderr, "erresc(default): gfx attr %d unknown\n", attr[i]), csidump();
1178 break;
1179 }
1180 }
1181 }
1182
1183 void
1184 tsetscroll(int t, int b) {
1185 int temp;
1186
1187 LIMIT(t, 0, term.row-1);
1188 LIMIT(b, 0, term.row-1);
1189 if(t > b) {
1190 temp = t;
1191 t = b;
1192 b = temp;
1193 }
1194 term.top = t;
1195 term.bot = b;
1196 }
1197
1198 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1199
1200 void
1201 tsetmode(bool priv, bool set, int *args, int narg) {
1202 int *lim, mode;
1203
1204 for (lim = args + narg; args < lim; ++args) {
1205 if(priv) {
1206 switch(*args) {
1207 case 1:
1208 MODBIT(term.mode, set, MODE_APPKEYPAD);
1209 break;
1210 case 5: /* DECSCNM -- Reverve video */
1211 mode = term.mode;
1212 MODBIT(term.mode,set, MODE_REVERSE);
1213 if (mode != term.mode)
1214 redraw();
1215 break;
1216 case 7:
1217 MODBIT(term.mode, set, MODE_WRAP);
1218 break;
1219 case 20:
1220 MODBIT(term.mode, set, MODE_CRLF);
1221 break;
1222 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1223 break;
1224 case 25:
1225 MODBIT(term.c.state, !set, CURSOR_HIDE);
1226 break;
1227 case 1000: /* 1000,1002: enable xterm mouse report */
1228 MODBIT(term.mode, set, MODE_MOUSEBTN);
1229 break;
1230 case 1002:
1231 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1232 break;
1233 case 1049: /* = 1047 and 1048 */
1234 case 47:
1235 case 1047:
1236 if(IS_SET(MODE_ALTSCREEN))
1237 tclearregion(0, 0, term.col-1, term.row-1);
1238 if ((set && !IS_SET(MODE_ALTSCREEN)) ||
1239 (!set && IS_SET(MODE_ALTSCREEN))) {
1240 tswapscreen();
1241 }
1242 if (*args != 1049)
1243 break;
1244 /* pass through */
1245 case 1048:
1246 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1247 break;
1248 default:
1249 fprintf(stderr,
1250 "erresc: unknown private set/reset mode %d\n",
1251 *args);
1252 break;
1253 }
1254 } else {
1255 switch(*args) {
1256 case 4:
1257 MODBIT(term.mode, set, MODE_INSERT);
1258 break;
1259 default:
1260 fprintf(stderr,
1261 "erresc: unknown set/reset mode %d\n",
1262 *args);
1263 break;
1264 }
1265 }
1266 }
1267 }
1268 #undef MODBIT
1269
1270
1271 void
1272 csihandle(void) {
1273 switch(csiescseq.mode) {
1274 default:
1275 unknown:
1276 fprintf(stderr, "erresc: unknown csi ");
1277 csidump();
1278 /* die(""); */
1279 break;
1280 case '@': /* ICH -- Insert <n> blank char */
1281 DEFAULT(csiescseq.arg[0], 1);
1282 tinsertblank(csiescseq.arg[0]);
1283 break;
1284 case 'A': /* CUU -- Cursor <n> Up */
1285 case 'e':
1286 DEFAULT(csiescseq.arg[0], 1);
1287 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1288 break;
1289 case 'B': /* CUD -- Cursor <n> Down */
1290 DEFAULT(csiescseq.arg[0], 1);
1291 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1292 break;
1293 case 'C': /* CUF -- Cursor <n> Forward */
1294 case 'a':
1295 DEFAULT(csiescseq.arg[0], 1);
1296 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1297 break;
1298 case 'D': /* CUB -- Cursor <n> Backward */
1299 DEFAULT(csiescseq.arg[0], 1);
1300 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1301 break;
1302 case 'E': /* CNL -- Cursor <n> Down and first col */
1303 DEFAULT(csiescseq.arg[0], 1);
1304 tmoveto(0, term.c.y+csiescseq.arg[0]);
1305 break;
1306 case 'F': /* CPL -- Cursor <n> Up and first col */
1307 DEFAULT(csiescseq.arg[0], 1);
1308 tmoveto(0, term.c.y-csiescseq.arg[0]);
1309 break;
1310 case 'g': /* TBC -- Tabulation clear */
1311 switch (csiescseq.arg[0]) {
1312 case 0: /* clear current tab stop */
1313 term.tabs[term.c.x] = 0;
1314 break;
1315 case 3: /* clear all the tabs */
1316 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1317 break;
1318 default:
1319 goto unknown;
1320 }
1321 break;
1322 case 'G': /* CHA -- Move to <col> */
1323 case '`': /* XXX: HPA -- same? */
1324 DEFAULT(csiescseq.arg[0], 1);
1325 tmoveto(csiescseq.arg[0]-1, term.c.y);
1326 break;
1327 case 'H': /* CUP -- Move to <row> <col> */
1328 case 'f': /* XXX: HVP -- same? */
1329 DEFAULT(csiescseq.arg[0], 1);
1330 DEFAULT(csiescseq.arg[1], 1);
1331 tmoveto(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1332 break;
1333 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1334 DEFAULT(csiescseq.arg[0], 1);
1335 while (csiescseq.arg[0]--)
1336 tputtab(1);
1337 break;
1338 case 'J': /* ED -- Clear screen */
1339 sel.bx = -1;
1340 switch(csiescseq.arg[0]) {
1341 case 0: /* below */
1342 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1343 if(term.c.y < term.row-1)
1344 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1345 break;
1346 case 1: /* above */
1347 if(term.c.y > 1)
1348 tclearregion(0, 0, term.col-1, term.c.y-1);
1349 tclearregion(0, term.c.y, term.c.x, term.c.y);
1350 break;
1351 case 2: /* all */
1352 tclearregion(0, 0, term.col-1, term.row-1);
1353 break;
1354 default:
1355 goto unknown;
1356 }
1357 break;
1358 case 'K': /* EL -- Clear line */
1359 switch(csiescseq.arg[0]) {
1360 case 0: /* right */
1361 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1362 break;
1363 case 1: /* left */
1364 tclearregion(0, term.c.y, term.c.x, term.c.y);
1365 break;
1366 case 2: /* all */
1367 tclearregion(0, term.c.y, term.col-1, term.c.y);
1368 break;
1369 }
1370 break;
1371 case 'S': /* SU -- Scroll <n> line up */
1372 DEFAULT(csiescseq.arg[0], 1);
1373 tscrollup(term.top, csiescseq.arg[0]);
1374 break;
1375 case 'T': /* SD -- Scroll <n> line down */
1376 DEFAULT(csiescseq.arg[0], 1);
1377 tscrolldown(term.top, csiescseq.arg[0]);
1378 break;
1379 case 'L': /* IL -- Insert <n> blank lines */
1380 DEFAULT(csiescseq.arg[0], 1);
1381 tinsertblankline(csiescseq.arg[0]);
1382 break;
1383 case 'l': /* RM -- Reset Mode */
1384 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1385 break;
1386 case 'M': /* DL -- Delete <n> lines */
1387 DEFAULT(csiescseq.arg[0], 1);
1388 tdeleteline(csiescseq.arg[0]);
1389 break;
1390 case 'X': /* ECH -- Erase <n> char */
1391 DEFAULT(csiescseq.arg[0], 1);
1392 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
1393 break;
1394 case 'P': /* DCH -- Delete <n> char */
1395 DEFAULT(csiescseq.arg[0], 1);
1396 tdeletechar(csiescseq.arg[0]);
1397 break;
1398 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1399 DEFAULT(csiescseq.arg[0], 1);
1400 while (csiescseq.arg[0]--)
1401 tputtab(0);
1402 break;
1403 case 'd': /* VPA -- Move to <row> */
1404 DEFAULT(csiescseq.arg[0], 1);
1405 tmoveto(term.c.x, csiescseq.arg[0]-1);
1406 break;
1407 case 'h': /* SM -- Set terminal mode */
1408 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1409 break;
1410 case 'm': /* SGR -- Terminal attribute (color) */
1411 tsetattr(csiescseq.arg, csiescseq.narg);
1412 break;
1413 case 'r': /* DECSTBM -- Set Scrolling Region */
1414 if(csiescseq.priv)
1415 goto unknown;
1416 else {
1417 DEFAULT(csiescseq.arg[0], 1);
1418 DEFAULT(csiescseq.arg[1], term.row);
1419 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1420 tmoveto(0, 0);
1421 }
1422 break;
1423 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1424 tcursor(CURSOR_SAVE);
1425 break;
1426 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1427 tcursor(CURSOR_LOAD);
1428 break;
1429 }
1430 }
1431
1432 void
1433 csidump(void) {
1434 int i;
1435 printf("ESC[");
1436 for(i = 0; i < csiescseq.len; i++) {
1437 uint c = csiescseq.buf[i] & 0xff;
1438 if(isprint(c)) putchar(c);
1439 else if(c == '\n') printf("(\\n)");
1440 else if(c == '\r') printf("(\\r)");
1441 else if(c == 0x1b) printf("(\\e)");
1442 else printf("(%02x)", c);
1443 }
1444 putchar('\n');
1445 }
1446
1447 void
1448 csireset(void) {
1449 memset(&csiescseq, 0, sizeof(csiescseq));
1450 }
1451
1452 void
1453 strhandle(void) {
1454 char *p;
1455
1456 /*
1457 * TODO: make this being useful in case of color palette change.
1458 */
1459 strparse();
1460
1461 p = strescseq.buf;
1462
1463 switch(strescseq.type) {
1464 case ']': /* OSC -- Operating System Command */
1465 switch(p[0]) {
1466 case '0':
1467 case '1':
1468 case '2':
1469 /*
1470 * TODO: Handle special chars in string, like umlauts.
1471 */
1472 if(p[1] == ';') {
1473 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1474 }
1475 break;
1476 case ';':
1477 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1478 break;
1479 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1480 break;
1481 default:
1482 fprintf(stderr, "erresc: unknown str ");
1483 strdump();
1484 break;
1485 }
1486 break;
1487 case 'P': /* DSC -- Device Control String */
1488 case '_': /* APC -- Application Program Command */
1489 case '^': /* PM -- Privacy Message */
1490 default:
1491 fprintf(stderr, "erresc: unknown str ");
1492 strdump();
1493 /* die(""); */
1494 break;
1495 }
1496 }
1497
1498 void
1499 strparse(void) {
1500 /*
1501 * TODO: Implement parsing like for CSI when required.
1502 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1503 */
1504 return;
1505 }
1506
1507 void
1508 strdump(void) {
1509 int i;
1510 printf("ESC%c", strescseq.type);
1511 for(i = 0; i < strescseq.len; i++) {
1512 uint c = strescseq.buf[i] & 0xff;
1513 if(isprint(c)) putchar(c);
1514 else if(c == '\n') printf("(\\n)");
1515 else if(c == '\r') printf("(\\r)");
1516 else if(c == 0x1b) printf("(\\e)");
1517 else printf("(%02x)", c);
1518 }
1519 printf("ESC\\\n");
1520 }
1521
1522 void
1523 strreset(void) {
1524 memset(&strescseq, 0, sizeof(strescseq));
1525 }
1526
1527 void
1528 tputtab(bool forward) {
1529 unsigned x = term.c.x;
1530
1531 if (forward) {
1532 if (x == term.col)
1533 return;
1534 for (++x; x < term.col && !term.tabs[x]; ++x)
1535 /* nothing */ ;
1536 } else {
1537 if (x == 0)
1538 return;
1539 for (--x; x > 0 && !term.tabs[x]; --x)
1540 /* nothing */ ;
1541 }
1542 tmoveto(x, term.c.y);
1543 }
1544
1545 void
1546 tputc(char *c) {
1547 char ascii = *c;
1548
1549 if (fileio)
1550 putc(ascii, fileio);
1551 if(term.esc & ESC_START) {
1552 if(term.esc & ESC_CSI) {
1553 csiescseq.buf[csiescseq.len++] = ascii;
1554 if(BETWEEN(ascii, 0x40, 0x7E) || csiescseq.len >= ESC_BUF_SIZ) {
1555 term.esc = 0;
1556 csiparse(), csihandle();
1557 }
1558 } else if(term.esc & ESC_STR) {
1559 switch(ascii) {
1560 case '\033':
1561 term.esc = ESC_START | ESC_STR_END;
1562 break;
1563 case '\a': /* backwards compatibility to xterm */
1564 term.esc = 0;
1565 strhandle();
1566 break;
1567 default:
1568 strescseq.buf[strescseq.len++] = ascii;
1569 if (strescseq.len+1 >= STR_BUF_SIZ) {
1570 term.esc = 0;
1571 strhandle();
1572 }
1573 }
1574 } else if(term.esc & ESC_STR_END) {
1575 term.esc = 0;
1576 if(ascii == '\\')
1577 strhandle();
1578 } else if(term.esc & ESC_ALTCHARSET) {
1579 switch(ascii) {
1580 case '0': /* Line drawing crap */
1581 term.c.attr.mode |= ATTR_GFX;
1582 break;
1583 case 'B': /* Back to regular text */
1584 term.c.attr.mode &= ~ATTR_GFX;
1585 break;
1586 default:
1587 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1588 }
1589 term.esc = 0;
1590 } else {
1591 switch(ascii) {
1592 case '[':
1593 term.esc |= ESC_CSI;
1594 break;
1595 case 'P': /* DCS -- Device Control String */
1596 case '_': /* APC -- Application Program Command */
1597 case '^': /* PM -- Privacy Message */
1598 case ']': /* OSC -- Operating System Command */
1599 strreset();
1600 strescseq.type = ascii;
1601 term.esc |= ESC_STR;
1602 break;
1603 case '(':
1604 term.esc |= ESC_ALTCHARSET;
1605 break;
1606 case 'D': /* IND -- Linefeed */
1607 if(term.c.y == term.bot)
1608 tscrollup(term.top, 1);
1609 else
1610 tmoveto(term.c.x, term.c.y+1);
1611 term.esc = 0;
1612 break;
1613 case 'E': /* NEL -- Next line */
1614 tnewline(1); /* always go to first col */
1615 term.esc = 0;
1616 break;
1617 case 'H': /* HTS -- Horizontal tab stop */
1618 term.tabs[term.c.x] = 1;
1619 term.esc = 0;
1620 break;
1621 case 'M': /* RI -- Reverse index */
1622 if(term.c.y == term.top)
1623 tscrolldown(term.top, 1);
1624 else
1625 tmoveto(term.c.x, term.c.y-1);
1626 term.esc = 0;
1627 break;
1628 case 'c': /* RIS -- Reset to inital state */
1629 treset();
1630 term.esc = 0;
1631 break;
1632 case '=': /* DECPAM -- Application keypad */
1633 term.mode |= MODE_APPKEYPAD;
1634 term.esc = 0;
1635 break;
1636 case '>': /* DECPNM -- Normal keypad */
1637 term.mode &= ~MODE_APPKEYPAD;
1638 term.esc = 0;
1639 break;
1640 case '7': /* DECSC -- Save Cursor */
1641 tcursor(CURSOR_SAVE);
1642 term.esc = 0;
1643 break;
1644 case '8': /* DECRC -- Restore Cursor */
1645 tcursor(CURSOR_LOAD);
1646 term.esc = 0;
1647 break;
1648 case '\\': /* ST -- Stop */
1649 term.esc = 0;
1650 break;
1651 default:
1652 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
1653 (uchar) ascii, isprint(ascii)?ascii:'.');
1654 term.esc = 0;
1655 }
1656 }
1657 } else {
1658 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
1659 sel.bx = -1;
1660 switch(ascii) {
1661 case '\t':
1662 tputtab(1);
1663 break;
1664 case '\b':
1665 tmoveto(term.c.x-1, term.c.y);
1666 break;
1667 case '\r':
1668 tmoveto(0, term.c.y);
1669 break;
1670 case '\f':
1671 case '\v':
1672 case '\n':
1673 /* go to first col if the mode is set */
1674 tnewline(IS_SET(MODE_CRLF));
1675 break;
1676 case '\a':
1677 if(!(xw.state & WIN_FOCUSED))
1678 xseturgency(1);
1679 break;
1680 case '\033':
1681 csireset();
1682 term.esc = ESC_START;
1683 break;
1684 default:
1685 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1686 tnewline(1); /* always go to first col */
1687 tsetchar(c);
1688 if(term.c.x+1 < term.col)
1689 tmoveto(term.c.x+1, term.c.y);
1690 else
1691 term.c.state |= CURSOR_WRAPNEXT;
1692 }
1693 }
1694 }
1695
1696 int
1697 tresize(int col, int row) {
1698 int i, x;
1699 int minrow = MIN(row, term.row);
1700 int mincol = MIN(col, term.col);
1701 int slide = term.c.y - row + 1;
1702
1703 if(col < 1 || row < 1)
1704 return 0;
1705
1706 /* free unneeded rows */
1707 i = 0;
1708 if(slide > 0) {
1709 /* slide screen to keep cursor where we expect it -
1710 * tscrollup would work here, but we can optimize to
1711 * memmove because we're freeing the earlier lines */
1712 for(/* i = 0 */; i < slide; i++) {
1713 free(term.line[i]);
1714 free(term.alt[i]);
1715 }
1716 memmove(term.line, term.line + slide, row * sizeof(Line));
1717 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1718 }
1719 for(i += row; i < term.row; i++) {
1720 free(term.line[i]);
1721 free(term.alt[i]);
1722 }
1723
1724 /* resize to new height */
1725 term.line = realloc(term.line, row * sizeof(Line));
1726 term.alt = realloc(term.alt, row * sizeof(Line));
1727 term.dirty = realloc(term.dirty, row * sizeof(*term.dirty));
1728 term.tabs = realloc(term.tabs, col * sizeof(*term.tabs));
1729
1730 /* resize each row to new width, zero-pad if needed */
1731 for(i = 0; i < minrow; i++) {
1732 term.dirty[i] = 1;
1733 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
1734 term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
1735 for(x = mincol; x < col; x++) {
1736 term.line[i][x].state = 0;
1737 term.alt[i][x].state = 0;
1738 }
1739 }
1740
1741 /* allocate any new rows */
1742 for(/* i == minrow */; i < row; i++) {
1743 term.dirty[i] = 1;
1744 term.line[i] = calloc(col, sizeof(Glyph));
1745 term.alt [i] = calloc(col, sizeof(Glyph));
1746 }
1747 if (col > term.col) {
1748 bool *bp = term.tabs + term.col;
1749
1750 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
1751 while (--bp > term.tabs && !*bp)
1752 /* nothing */ ;
1753 for (bp += TAB; bp < term.tabs + col; bp += TAB)
1754 *bp = 1;
1755 }
1756 /* update terminal size */
1757 term.col = col, term.row = row;
1758 /* make use of the LIMIT in tmoveto */
1759 tmoveto(term.c.x, term.c.y);
1760 /* reset scrolling region */
1761 tsetscroll(0, row-1);
1762
1763 return (slide > 0);
1764 }
1765
1766 void
1767 xresize(int col, int row) {
1768 xw.w = MAX(1, 2*BORDER + col * xw.cw);
1769 xw.h = MAX(1, 2*BORDER + row * xw.ch);
1770 }
1771
1772 void
1773 xloadcols(void) {
1774 int i, r, g, b;
1775 XColor color;
1776 ulong white = WhitePixel(xw.dpy, xw.scr);
1777
1778 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
1779 for(i = 0; i < LEN(colorname); i++) {
1780 if(!colorname[i])
1781 continue;
1782 if(!XAllocNamedColor(xw.dpy, xw.cmap, colorname[i], &color, &color)) {
1783 dc.col[i] = white;
1784 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1785 } else
1786 dc.col[i] = color.pixel;
1787 }
1788
1789 /* load colors [16-255] ; same colors as xterm */
1790 for(i = 16, r = 0; r < 6; r++)
1791 for(g = 0; g < 6; g++)
1792 for(b = 0; b < 6; b++) {
1793 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1794 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1795 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1796 if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
1797 dc.col[i] = white;
1798 fprintf(stderr, "Could not allocate color %d\n", i);
1799 } else
1800 dc.col[i] = color.pixel;
1801 i++;
1802 }
1803
1804 for(r = 0; r < 24; r++, i++) {
1805 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1806 if (!XAllocColor(xw.dpy, xw.cmap, &color)) {
1807 dc.col[i] = white;
1808 fprintf(stderr, "Could not allocate color %d\n", i);
1809 } else
1810 dc.col[i] = color.pixel;
1811 }
1812 }
1813
1814 void
1815 xclear(int x1, int y1, int x2, int y2) {
1816 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
1817 XFillRectangle(xw.dpy, xw.buf, dc.gc,
1818 BORDER + x1 * xw.cw, BORDER + y1 * xw.ch,
1819 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1820 }
1821
1822 void
1823 xhints(void) {
1824 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
1825 XWMHints wm = {.flags = InputHint, .input = 1};
1826 XSizeHints *sizeh = NULL;
1827
1828 sizeh = XAllocSizeHints();
1829 if(xw.isfixed == False) {
1830 sizeh->flags = PSize | PResizeInc | PBaseSize;
1831 sizeh->height = xw.h;
1832 sizeh->width = xw.w;
1833 sizeh->height_inc = xw.ch;
1834 sizeh->width_inc = xw.cw;
1835 sizeh->base_height = 2*BORDER;
1836 sizeh->base_width = 2*BORDER;
1837 } else {
1838 sizeh->flags = PMaxSize | PMinSize;
1839 sizeh->min_width = sizeh->max_width = xw.fw;
1840 sizeh->min_height = sizeh->max_height = xw.fh;
1841 }
1842
1843 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
1844 XFree(sizeh);
1845 }
1846
1847 XFontSet
1848 xinitfont(char *fontstr) {
1849 XFontSet set;
1850 char *def, **missing;
1851 int n;
1852
1853 missing = NULL;
1854 set = XCreateFontSet(xw.dpy, fontstr, &missing, &n, &def);
1855 if(missing) {
1856 while(n--)
1857 fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
1858 XFreeStringList(missing);
1859 }
1860 return set;
1861 }
1862
1863 void
1864 xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing) {
1865 XFontStruct **xfonts;
1866 char **font_names;
1867 int i, n;
1868
1869 *ascent = *descent = *lbearing = *rbearing = 0;
1870 n = XFontsOfFontSet(set, &xfonts, &font_names);
1871 for(i = 0; i < n; i++) {
1872 *ascent = MAX(*ascent, (*xfonts)->ascent);
1873 *descent = MAX(*descent, (*xfonts)->descent);
1874 *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
1875 *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
1876 xfonts++;
1877 }
1878 }
1879
1880 void
1881 initfonts(char *fontstr, char *bfontstr) {
1882 if((dc.font.set = xinitfont(fontstr)) == NULL ||
1883 (dc.bfont.set = xinitfont(bfontstr)) == NULL)
1884 die("Can't load font %s\n", dc.font.set ? BOLDFONT : FONT);
1885 xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
1886 &dc.font.lbearing, &dc.font.rbearing);
1887 xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
1888 &dc.bfont.lbearing, &dc.bfont.rbearing);
1889 }
1890
1891 void
1892 xinit(void) {
1893 XSetWindowAttributes attrs;
1894 Cursor cursor;
1895 Window parent;
1896 int sw, sh;
1897
1898 if(!(xw.dpy = XOpenDisplay(NULL)))
1899 die("Can't open display\n");
1900 xw.scr = XDefaultScreen(xw.dpy);
1901
1902 /* adjust fixed window geometry */
1903 if(xw.isfixed) {
1904 sw = DisplayWidth(xw.dpy, xw.scr);
1905 sh = DisplayHeight(xw.dpy, xw.scr);
1906 if(xw.fx < 0)
1907 xw.fx = sw + xw.fx - xw.fw - 1;
1908 if(xw.fy < 0)
1909 xw.fy = sh + xw.fy - xw.fh - 1;
1910 } else {
1911 /* window - default size */
1912 xw.h = 2*BORDER + term.row * xw.ch;
1913 xw.w = 2*BORDER + term.col * xw.cw;
1914 xw.fw = xw.w;
1915 xw.fh = xw.h;
1916 }
1917
1918 /* font */
1919 initfonts(FONT, BOLDFONT);
1920
1921 /* XXX: Assuming same size for bold font */
1922 xw.cw = dc.font.rbearing - dc.font.lbearing;
1923 xw.ch = dc.font.ascent + dc.font.descent;
1924
1925 /* colors */
1926 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1927 xloadcols();
1928
1929 attrs.background_pixel = dc.col[DefaultBG];
1930 attrs.border_pixel = dc.col[DefaultBG];
1931 attrs.bit_gravity = NorthWestGravity;
1932 attrs.event_mask = FocusChangeMask | KeyPressMask
1933 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1934 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask
1935 | EnterWindowMask | LeaveWindowMask;
1936 attrs.colormap = xw.cmap;
1937
1938 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
1939 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
1940 xw.fw, xw.fh, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
1941 XDefaultVisual(xw.dpy, xw.scr),
1942 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
1943 | CWColormap,
1944 &attrs);
1945 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
1946
1947
1948 /* input methods */
1949 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
1950 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
1951 | XIMStatusNothing, XNClientWindow, xw.win,
1952 XNFocusWindow, xw.win, NULL);
1953 /* gc */
1954 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
1955
1956 /* white cursor, black outline */
1957 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
1958 XDefineCursor(xw.dpy, xw.win, cursor);
1959 XRecolorCursor(xw.dpy, cursor,
1960 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
1961 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
1962
1963 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
1964
1965 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
1966 XMapWindow(xw.dpy, xw.win);
1967 xhints();
1968 XSync(xw.dpy, 0);
1969 }
1970
1971 void
1972 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
1973 int fg = base.fg, bg = base.bg, temp;
1974 int winx = BORDER+x*xw.cw, winy = BORDER+y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
1975 XFontSet fontset = dc.font.set;
1976 int i;
1977
1978 /* only switch default fg/bg if term is in RV mode */
1979 if(IS_SET(MODE_REVERSE)) {
1980 if(fg == DefaultFG)
1981 fg = DefaultBG;
1982 if(bg == DefaultBG)
1983 bg = DefaultFG;
1984 }
1985
1986 if(base.mode & ATTR_REVERSE)
1987 temp = fg, fg = bg, bg = temp;
1988
1989 if(base.mode & ATTR_BOLD) {
1990 fg += 8;
1991 fontset = dc.bfont.set;
1992 }
1993
1994 XSetBackground(xw.dpy, dc.gc, dc.col[bg]);
1995 XSetForeground(xw.dpy, dc.gc, dc.col[fg]);
1996
1997 if(base.mode & ATTR_GFX) {
1998 for(i = 0; i < bytelen; i++) {
1999 char c = gfx[(uint)s[i] % 256];
2000 if(c)
2001 s[i] = c;
2002 else if(s[i] > 0x5f)
2003 s[i] -= 0x5f;
2004 }
2005 }
2006
2007 XmbDrawImageString(xw.dpy, xw.buf, fontset, dc.gc, winx, winy, s, bytelen);
2008
2009 if(base.mode & ATTR_UNDERLINE)
2010 XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
2011 }
2012
2013 /* copy buffer pixmap to screen pixmap */
2014 void
2015 xcopy() {
2016 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2017 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2018
2019 }
2020
2021 void
2022 xdrawcursor(void) {
2023 static int oldx = 0;
2024 static int oldy = 0;
2025 int sl;
2026 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
2027
2028 LIMIT(oldx, 0, term.col-1);
2029 LIMIT(oldy, 0, term.row-1);
2030
2031 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2032 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2033
2034 /* remove the old cursor */
2035 if(term.line[oldy][oldx].state & GLYPH_SET) {
2036 sl = utf8size(term.line[oldy][oldx].c);
2037 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
2038 } else
2039 xclear(oldx, oldy, oldx, oldy);
2040
2041 xcopy(oldx, oldy, 1, 1);
2042
2043 /* draw the new one */
2044 if(!(term.c.state & CURSOR_HIDE)) {
2045 if(!(xw.state & WIN_FOCUSED))
2046 g.bg = DefaultUCS;
2047
2048 if(IS_SET(MODE_REVERSE))
2049 g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
2050
2051 sl = utf8size(g.c);
2052 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2053 oldx = term.c.x, oldy = term.c.y;
2054 }
2055
2056 xcopy(term.c.x, term.c.y, 1, 1);
2057 }
2058
2059 void
2060 redraw(void) {
2061 struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
2062 tfulldirt();
2063 draw();
2064 nanosleep(&tv, NULL);
2065 }
2066
2067 void
2068 draw() {
2069 drawregion(0, 0, term.col, term.row);
2070 xcopy();
2071 gettimeofday(&xw.lastdraw, NULL);
2072 }
2073
2074 void
2075 drawregion(int x1, int y1, int x2, int y2) {
2076 int ic, ib, x, y, ox, sl;
2077 Glyph base, new;
2078 char buf[DRAW_BUF_SIZ];
2079
2080 if(!(xw.state & WIN_VISIBLE))
2081 return;
2082
2083 for(y = y1; y < y2; y++) {
2084 if(!term.dirty[y])
2085 continue;
2086 xclear(0, y, term.col, y);
2087 term.dirty[y] = 0;
2088 base = term.line[y][0];
2089 ic = ib = ox = 0;
2090 for(x = x1; x < x2; x++) {
2091 new = term.line[y][x];
2092 if(sel.bx != -1 && *(new.c) && selected(x, y))
2093 new.mode ^= ATTR_REVERSE;
2094 if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
2095 ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2096 xdraws(buf, base, ox, y, ic, ib);
2097 ic = ib = 0;
2098 }
2099 if(new.state & GLYPH_SET) {
2100 if(ib == 0) {
2101 ox = x;
2102 base = new;
2103 }
2104 sl = utf8size(new.c);
2105 memcpy(buf+ib, new.c, sl);
2106 ib += sl;
2107 ++ic;
2108 }
2109 }
2110 if(ib > 0)
2111 xdraws(buf, base, ox, y, ic, ib);
2112 }
2113 xdrawcursor();
2114 }
2115
2116 void
2117 expose(XEvent *ev) {
2118 XExposeEvent *e = &ev->xexpose;
2119 if(xw.state & WIN_REDRAW) {
2120 if(!e->count)
2121 xw.state &= ~WIN_REDRAW;
2122 }
2123 xcopy();
2124 }
2125
2126 void
2127 visibility(XEvent *ev) {
2128 XVisibilityEvent *e = &ev->xvisibility;
2129 if(e->state == VisibilityFullyObscured)
2130 xw.state &= ~WIN_VISIBLE;
2131 else if(!(xw.state & WIN_VISIBLE))
2132 /* need a full redraw for next Expose, not just a buf copy */
2133 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2134 }
2135
2136 void
2137 unmap(XEvent *ev) {
2138 xw.state &= ~WIN_VISIBLE;
2139 }
2140
2141 void
2142 xseturgency(int add) {
2143 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2144 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2145 XSetWMHints(xw.dpy, xw.win, h);
2146 XFree(h);
2147 }
2148
2149 void
2150 focus(XEvent *ev) {
2151 if(ev->type == FocusIn) {
2152 xw.state |= WIN_FOCUSED;
2153 xseturgency(0);
2154 } else
2155 xw.state &= ~WIN_FOCUSED;
2156 draw();
2157 }
2158
2159 char*
2160 kmap(KeySym k, uint state) {
2161 int i;
2162 state &= ~Mod2Mask;
2163 for(i = 0; i < LEN(key); i++) {
2164 uint mask = key[i].mask;
2165 if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
2166 return (char*)key[i].s;
2167 }
2168 return NULL;
2169 }
2170
2171 void
2172 kpress(XEvent *ev) {
2173 XKeyEvent *e = &ev->xkey;
2174 KeySym ksym;
2175 char buf[32];
2176 char *customkey;
2177 int len;
2178 int meta;
2179 int shift;
2180 Status status;
2181
2182 meta = e->state & Mod1Mask;
2183 shift = e->state & ShiftMask;
2184 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
2185
2186 /* 1. custom keys from config.h */
2187 if((customkey = kmap(ksym, e->state)))
2188 ttywrite(customkey, strlen(customkey));
2189 /* 2. hardcoded (overrides X lookup) */
2190 else
2191 switch(ksym) {
2192 case XK_Up:
2193 case XK_Down:
2194 case XK_Left:
2195 case XK_Right:
2196 /* XXX: shift up/down doesn't work */
2197 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
2198 ttywrite(buf, 3);
2199 break;
2200 case XK_Insert:
2201 if(shift)
2202 selpaste();
2203 break;
2204 case XK_Return:
2205 if(IS_SET(MODE_CRLF))
2206 ttywrite("\r\n", 2);
2207 else
2208 ttywrite("\r", 1);
2209 break;
2210 /* 3. X lookup */
2211 default:
2212 if(len > 0) {
2213 if(meta && len == 1)
2214 ttywrite("\033", 1);
2215 ttywrite(buf, len);
2216 }
2217 break;
2218 }
2219 }
2220
2221 void
2222 cmessage(XEvent *e) {
2223 /* See xembed specs
2224 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2225 if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2226 if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2227 xw.state |= WIN_FOCUSED;
2228 xseturgency(0);
2229 } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2230 xw.state &= ~WIN_FOCUSED;
2231 }
2232 draw();
2233 }
2234 }
2235
2236 void
2237 resize(XEvent *e) {
2238 int col, row;
2239
2240 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2241 return;
2242
2243 xw.w = e->xconfigure.width;
2244 xw.h = e->xconfigure.height;
2245 col = (xw.w - 2*BORDER) / xw.cw;
2246 row = (xw.h - 2*BORDER) / xw.ch;
2247 if(col == term.col && row == term.row)
2248 return;
2249 if(tresize(col, row))
2250 draw();
2251 ttyresize(col, row);
2252 xresize(col, row);
2253 }
2254
2255 bool
2256 last_draw_too_old(void) {
2257 struct timeval now;
2258 gettimeofday(&now, NULL);
2259 return TIMEDIFF(now, xw.lastdraw) >= DRAW_TIMEOUT/1000;
2260 }
2261
2262 void
2263 run(void) {
2264 XEvent ev;
2265 fd_set rfd;
2266 int xfd = XConnectionNumber(xw.dpy);
2267 struct timeval timeout = {0};
2268 bool stuff_to_print = 0;
2269
2270 for(;;) {
2271 FD_ZERO(&rfd);
2272 FD_SET(cmdfd, &rfd);
2273 FD_SET(xfd, &rfd);
2274 timeout.tv_sec = 0;
2275 timeout.tv_usec = SELECT_TIMEOUT;
2276 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, &timeout) < 0) {
2277 if(errno == EINTR)
2278 continue;
2279 die("select failed: %s\n", SERRNO);
2280 }
2281 if(FD_ISSET(cmdfd, &rfd)) {
2282 ttyread();
2283 stuff_to_print = 1;
2284 }
2285
2286 if(stuff_to_print && last_draw_too_old()) {
2287 stuff_to_print = 0;
2288 draw();
2289 }
2290
2291 while(XPending(xw.dpy)) {
2292 XNextEvent(xw.dpy, &ev);
2293 if(XFilterEvent(&ev, xw.win))
2294 continue;
2295 if(handler[ev.type])
2296 (handler[ev.type])(&ev);
2297 }
2298 }
2299 }
2300
2301 int
2302 main(int argc, char *argv[]) {
2303 int i, bitm, xr, yr;
2304 unsigned int wr, hr;
2305
2306 xw.fw = xw.fh = xw.fx = xw.fy = 0;
2307
2308 for(i = 1; i < argc; i++) {
2309 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2310 case 't':
2311 if(++i < argc) opt_title = argv[i];
2312 break;
2313 case 'c':
2314 if(++i < argc) opt_class = argv[i];
2315 break;
2316 case 'w':
2317 if(++i < argc) opt_embed = argv[i];
2318 break;
2319 case 'f':
2320 if (++i < argc) opt_io = argv[i];
2321 break;
2322 case 'e':
2323 /* eat every remaining arguments */
2324 if(++i < argc) opt_cmd = &argv[i];
2325 goto run;
2326 case 'g':
2327 if(++i >= argc)
2328 break;
2329
2330 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
2331 if(bitm & XValue)
2332 xw.fx = xr;
2333 if(bitm & YValue)
2334 xw.fy = yr;
2335 if(bitm & WidthValue)
2336 xw.fw = (int)wr;
2337 if(bitm & HeightValue)
2338 xw.fh = (int)hr;
2339 if(bitm & XNegative && xw.fx == 0)
2340 xw.fx = -1;
2341 if(bitm & XNegative && xw.fy == 0)
2342 xw.fy = -1;
2343
2344 if(xw.fh != 0 && xw.fw != 0)
2345 xw.isfixed = True;
2346 break;
2347 case 'v':
2348 default:
2349 die(USAGE);
2350 }
2351 }
2352
2353 run:
2354 setlocale(LC_CTYPE, "");
2355 tnew(80, 24);
2356 ttynew();
2357 xinit();
2358 selinit();
2359 run();
2360 return 0;
2361 }
2362