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[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #define _XOPEN_SOURCE 600
3 #include <ctype.h>
4 #include <errno.h>
5 #include <fcntl.h>
6 #include <limits.h>
7 #include <locale.h>
8 #include <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <sys/ioctl.h>
15 #include <sys/select.h>
16 #include <sys/stat.h>
17 #include <sys/time.h>
18 #include <sys/types.h>
19 #include <sys/wait.h>
20 #include <time.h>
21 #include <unistd.h>
22 #include <X11/Xatom.h>
23 #include <X11/Xlib.h>
24 #include <X11/Xutil.h>
25 #include <X11/cursorfont.h>
26 #include <X11/keysym.h>
27 #include <X11/extensions/Xdbe.h>
28
29 #if defined(__linux)
30 #include <pty.h>
31 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
32 #include <util.h>
33 #elif defined(__FreeBSD__) || defined(__DragonFly__)
34 #include <libutil.h>
35 #endif
36
37 #define USAGE \
38 "st " VERSION " (c) 2010-2012 st engineers\n" \
39 "usage: st [-t title] [-c class] [-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 bool alt;
225 struct timeval tclick1;
226 struct timeval tclick2;
227 } Selection;
228
229 #include "config.h"
230
231 /* Drawing Context */
232 typedef struct {
233 ulong col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
234 GC gc;
235 struct {
236 int ascent;
237 int descent;
238 short lbearing;
239 short rbearing;
240 XFontSet set;
241 } font, bfont;
242 } DC;
243
244 static void die(const char*, ...);
245 static void draw(void);
246 static void redraw(void);
247 static void drawregion(int, int, int, int);
248 static void execsh(void);
249 static void sigchld(int);
250 static void run(void);
251 static bool last_draw_too_old(void);
252
253 static void csidump(void);
254 static void csihandle(void);
255 static void csiparse(void);
256 static void csireset(void);
257 static void strdump(void);
258 static void strhandle(void);
259 static void strparse(void);
260 static void strreset(void);
261
262 static void tclearregion(int, int, int, int);
263 static void tcursor(int);
264 static void tdeletechar(int);
265 static void tdeleteline(int);
266 static void tinsertblank(int);
267 static void tinsertblankline(int);
268 static void tmoveto(int, int);
269 static void tnew(int, int);
270 static void tnewline(int);
271 static void tputtab(bool);
272 static void tputc(char*);
273 static void treset(void);
274 static int tresize(int, int);
275 static void tscrollup(int, int);
276 static void tscrolldown(int, int);
277 static void tsetattr(int*, int);
278 static void tsetchar(char*);
279 static void tsetscroll(int, int);
280 static void tswapscreen(void);
281 static void tsetdirt(int, int);
282 static void tsetmode(bool, bool, int *, int);
283 static void tfulldirt(void);
284
285 static void ttynew(void);
286 static void ttyread(void);
287 static void ttyresize(int, int);
288 static void ttywrite(const char *, size_t);
289
290 static void xdraws(char *, Glyph, int, int, int, int);
291 static void xhints(void);
292 static void xclear(int, int, int, int);
293 static void xcopy();
294 static void xdrawcursor(void);
295 static void xinit(void);
296 static void xloadcols(void);
297 static void xseturgency(int);
298 static void xsetsel(char*);
299 static void xresize(int, int);
300
301 static void expose(XEvent *);
302 static void visibility(XEvent *);
303 static void unmap(XEvent *);
304 static char* kmap(KeySym, uint);
305 static void kpress(XEvent *);
306 static void cmessage(XEvent *);
307 static void resize(XEvent *);
308 static void focus(XEvent *);
309 static void brelease(XEvent *);
310 static void bpress(XEvent *);
311 static void bmotion(XEvent *);
312 static void selnotify(XEvent *);
313 static void selrequest(XEvent *);
314
315 static void selinit(void);
316 static inline bool selected(int, int);
317 static void selcopy(void);
318 static void selpaste();
319 static void selscroll(int, int);
320
321 static int utf8decode(char *, long *);
322 static int utf8encode(long *, char *);
323 static int utf8size(char *);
324 static int isfullutf8(char *, int);
325
326 static void (*handler[LASTEvent])(XEvent *) = {
327 [KeyPress] = kpress,
328 [ClientMessage] = cmessage,
329 [ConfigureNotify] = resize,
330 [VisibilityNotify] = visibility,
331 [UnmapNotify] = unmap,
332 [Expose] = expose,
333 [FocusIn] = focus,
334 [FocusOut] = focus,
335 [MotionNotify] = bmotion,
336 [ButtonPress] = bpress,
337 [ButtonRelease] = brelease,
338 [SelectionNotify] = selnotify,
339 [SelectionRequest] = selrequest,
340 };
341
342 /* Globals */
343 static DC dc;
344 static XWindow xw;
345 static Term term;
346 static CSIEscape csiescseq;
347 static STREscape strescseq;
348 static int cmdfd;
349 static pid_t pid;
350 static Selection sel;
351 static FILE *fileio;
352 static char **opt_cmd = NULL;
353 static char *opt_io = NULL;
354 static char *opt_title = NULL;
355 static char *opt_embed = NULL;
356 static char *opt_class = NULL;
357
358 int
359 utf8decode(char *s, long *u) {
360 uchar c;
361 int i, n, rtn;
362
363 rtn = 1;
364 c = *s;
365 if(~c & B7) { /* 0xxxxxxx */
366 *u = c;
367 return rtn;
368 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
369 *u = c&(B4|B3|B2|B1|B0);
370 n = 1;
371 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
372 *u = c&(B3|B2|B1|B0);
373 n = 2;
374 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
375 *u = c & (B2|B1|B0);
376 n = 3;
377 } else
378 goto invalid;
379 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
380 c = *s;
381 if((c & (B7|B6)) != B7) /* 10xxxxxx */
382 goto invalid;
383 *u <<= 6;
384 *u |= c & (B5|B4|B3|B2|B1|B0);
385 }
386 if((n == 1 && *u < 0x80) ||
387 (n == 2 && *u < 0x800) ||
388 (n == 3 && *u < 0x10000) ||
389 (*u >= 0xD800 && *u <= 0xDFFF))
390 goto invalid;
391 return rtn;
392 invalid:
393 *u = 0xFFFD;
394 return rtn;
395 }
396
397 int
398 utf8encode(long *u, char *s) {
399 uchar *sp;
400 ulong uc;
401 int i, n;
402
403 sp = (uchar*) s;
404 uc = *u;
405 if(uc < 0x80) {
406 *sp = uc; /* 0xxxxxxx */
407 return 1;
408 } else if(*u < 0x800) {
409 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
410 n = 1;
411 } else if(uc < 0x10000) {
412 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
413 n = 2;
414 } else if(uc <= 0x10FFFF) {
415 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
416 n = 3;
417 } else {
418 goto invalid;
419 }
420 for(i=n,++sp; i>0; --i,++sp)
421 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
422 return n+1;
423 invalid:
424 /* U+FFFD */
425 *s++ = '\xEF';
426 *s++ = '\xBF';
427 *s = '\xBD';
428 return 3;
429 }
430
431 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
432 UTF-8 otherwise return 0 */
433 int
434 isfullutf8(char *s, int b) {
435 uchar *c1, *c2, *c3;
436
437 c1 = (uchar *) s;
438 c2 = (uchar *) ++s;
439 c3 = (uchar *) ++s;
440 if(b < 1)
441 return 0;
442 else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
443 return 0;
444 else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
445 ((b == 1) ||
446 ((b == 2) && (*c2&(B7|B6)) == B7)))
447 return 0;
448 else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
449 ((b == 1) ||
450 ((b == 2) && (*c2&(B7|B6)) == B7) ||
451 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7)))
452 return 0;
453 else
454 return 1;
455 }
456
457 int
458 utf8size(char *s) {
459 uchar c = *s;
460
461 if(~c&B7)
462 return 1;
463 else if((c&(B7|B6|B5)) == (B7|B6))
464 return 2;
465 else if((c&(B7|B6|B5|B4)) == (B7|B6|B5))
466 return 3;
467 else
468 return 4;
469 }
470
471 void
472 selinit(void) {
473 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
474 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
475 sel.mode = 0;
476 sel.bx = -1;
477 sel.clip = NULL;
478 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
479 if(sel.xtarget == None)
480 sel.xtarget = XA_STRING;
481 }
482
483 static inline bool
484 selected(int x, int y) {
485 if(sel.ey == y && sel.by == y) {
486 int bx = MIN(sel.bx, sel.ex);
487 int ex = MAX(sel.bx, sel.ex);
488 return BETWEEN(x, bx, ex);
489 }
490 return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
491 || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
492 }
493
494 void
495 getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
496 if(b)
497 *b = e->xbutton.button;
498
499 *x = X2COL(e->xbutton.x);
500 *y = Y2ROW(e->xbutton.y);
501 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
502 sel.b.y = MIN(sel.by, sel.ey);
503 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
504 sel.e.y = MAX(sel.by, sel.ey);
505 }
506
507 void
508 mousereport(XEvent *e) {
509 int x = X2COL(e->xbutton.x);
510 int y = Y2ROW(e->xbutton.y);
511 int button = e->xbutton.button;
512 int state = e->xbutton.state;
513 char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
514 static int ob, ox, oy;
515
516 /* from urxvt */
517 if(e->xbutton.type == MotionNotify) {
518 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
519 return;
520 button = ob + 32;
521 ox = x, oy = y;
522 } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
523 button = 3;
524 } else {
525 button -= Button1;
526 if(button >= 3)
527 button += 64 - 3;
528 if(e->xbutton.type == ButtonPress) {
529 ob = button;
530 ox = x, oy = y;
531 }
532 }
533
534 buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
535 + (state & Mod4Mask ? 8 : 0)
536 + (state & ControlMask ? 16 : 0);
537
538 ttywrite(buf, sizeof(buf));
539 }
540
541 void
542 bpress(XEvent *e) {
543 if(IS_SET(MODE_MOUSE))
544 mousereport(e);
545 else if(e->xbutton.button == Button1) {
546 if(sel.bx != -1)
547 tsetdirt(sel.b.y, sel.e.y);
548 sel.mode = 1;
549 sel.ex = sel.bx = X2COL(e->xbutton.x);
550 sel.ey = sel.by = Y2ROW(e->xbutton.y);
551 }
552 }
553
554 void
555 selcopy(void) {
556 char *str, *ptr;
557 int x, y, bufsize, is_selected = 0;
558
559 if(sel.bx == -1)
560 str = NULL;
561
562 else {
563 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
564 ptr = str = malloc(bufsize);
565
566 /* append every set & selected glyph to the selection */
567 for(y = 0; y < term.row; y++) {
568 for(x = 0; x < term.col; x++) {
569 is_selected = selected(x, y);
570 if((term.line[y][x].state & GLYPH_SET) && is_selected) {
571 int size = utf8size(term.line[y][x].c);
572 memcpy(ptr, term.line[y][x].c, size);
573 ptr += size;
574 }
575 }
576
577 /* \n at the end of every selected line except for the last one */
578 if(is_selected && y < sel.e.y)
579 *ptr++ = '\n';
580 }
581 *ptr = 0;
582 }
583 sel.alt = IS_SET(MODE_ALTSCREEN);
584 xsetsel(str);
585 }
586
587 void
588 selnotify(XEvent *e) {
589 ulong nitems, ofs, rem;
590 int format;
591 uchar *data;
592 Atom type;
593
594 ofs = 0;
595 do {
596 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
597 False, AnyPropertyType, &type, &format,
598 &nitems, &rem, &data)) {
599 fprintf(stderr, "Clipboard allocation failed\n");
600 return;
601 }
602 ttywrite((const char *) data, nitems * format / 8);
603 XFree(data);
604 /* number of 32-bit chunks returned */
605 ofs += nitems * format / 32;
606 } while(rem > 0);
607 }
608
609 void
610 selpaste() {
611 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY, xw.win, CurrentTime);
612 }
613
614 void
615 selrequest(XEvent *e) {
616 XSelectionRequestEvent *xsre;
617 XSelectionEvent xev;
618 Atom xa_targets;
619
620 xsre = (XSelectionRequestEvent *) e;
621 xev.type = SelectionNotify;
622 xev.requestor = xsre->requestor;
623 xev.selection = xsre->selection;
624 xev.target = xsre->target;
625 xev.time = xsre->time;
626 /* reject */
627 xev.property = None;
628
629 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
630 if(xsre->target == xa_targets) {
631 /* respond with the supported type */
632 Atom string = sel.xtarget;
633 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
634 XA_ATOM, 32, PropModeReplace,
635 (uchar *) &string, 1);
636 xev.property = xsre->property;
637 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
638 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
639 xsre->target, 8, PropModeReplace,
640 (uchar *) sel.clip, strlen(sel.clip));
641 xev.property = xsre->property;
642 }
643
644 /* all done, send a notification to the listener */
645 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
646 fprintf(stderr, "Error sending SelectionNotify event\n");
647 }
648
649 void
650 xsetsel(char *str) {
651 /* register the selection for both the clipboard and the primary */
652 Atom clipboard;
653
654 free(sel.clip);
655 sel.clip = str;
656
657 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
658
659 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
660 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
661
662 XFlush(xw.dpy);
663 }
664
665 void
666 brelease(XEvent *e) {
667 if(IS_SET(MODE_MOUSE)) {
668 mousereport(e);
669 return;
670 }
671 if(e->xbutton.button == Button2)
672 selpaste();
673 else if(e->xbutton.button == Button1) {
674 sel.mode = 0;
675 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
676 term.dirty[sel.ey] = 1;
677 if(sel.bx == sel.ex && sel.by == sel.ey) {
678 struct timeval now;
679 sel.bx = -1;
680 gettimeofday(&now, NULL);
681
682 if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
683 /* triple click on the line */
684 sel.b.x = sel.bx = 0;
685 sel.e.x = sel.ex = term.col;
686 sel.b.y = sel.e.y = sel.ey;
687 selcopy();
688 } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
689 /* double click to select word */
690 sel.bx = sel.ex;
691 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
692 term.line[sel.ey][sel.bx-1].c[0] != ' ') sel.bx--;
693 sel.b.x = sel.bx;
694 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
695 term.line[sel.ey][sel.ex+1].c[0] != ' ') sel.ex++;
696 sel.e.x = sel.ex;
697 sel.b.y = sel.e.y = sel.ey;
698 selcopy();
699 }
700 } else
701 selcopy();
702 }
703 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
704 gettimeofday(&sel.tclick1, NULL);
705 draw();
706 }
707
708 void
709 bmotion(XEvent *e) {
710 if(IS_SET(MODE_MOUSE)) {
711 mousereport(e);
712 return;
713 }
714 if(sel.mode) {
715 int oldey = sel.ey, oldex = sel.ex;
716 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
717
718 if(oldey != sel.ey || oldex != sel.ex) {
719 int starty = MIN(oldey, sel.ey);
720 int endy = MAX(oldey, sel.ey);
721 tsetdirt(starty, endy);
722 draw();
723 }
724 }
725 }
726
727 void
728 die(const char *errstr, ...) {
729 va_list ap;
730
731 va_start(ap, errstr);
732 vfprintf(stderr, errstr, ap);
733 va_end(ap);
734 exit(EXIT_FAILURE);
735 }
736
737 void
738 execsh(void) {
739 char **args;
740 char *envshell = getenv("SHELL");
741
742 unsetenv("COLUMNS");
743 unsetenv("LINES");
744 unsetenv("TERMCAP");
745
746 DEFAULT(envshell, SHELL);
747 putenv("TERM="TNAME);
748 args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
749 execvp(args[0], args);
750 exit(EXIT_FAILURE);
751 }
752
753 void
754 sigchld(int a) {
755 int stat = 0;
756 if(waitpid(pid, &stat, 0) < 0)
757 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
758 if(WIFEXITED(stat))
759 exit(WEXITSTATUS(stat));
760 else
761 exit(EXIT_FAILURE);
762 }
763
764 void
765 ttynew(void) {
766 int m, s;
767
768 /* seems to work fine on linux, openbsd and freebsd */
769 struct winsize w = {term.row, term.col, 0, 0};
770 if(openpty(&m, &s, NULL, NULL, &w) < 0)
771 die("openpty failed: %s\n", SERRNO);
772
773 switch(pid = fork()) {
774 case -1:
775 die("fork failed\n");
776 break;
777 case 0:
778 setsid(); /* create a new process group */
779 dup2(s, STDIN_FILENO);
780 dup2(s, STDOUT_FILENO);
781 dup2(s, STDERR_FILENO);
782 if(ioctl(s, TIOCSCTTY, NULL) < 0)
783 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
784 close(s);
785 close(m);
786 execsh();
787 break;
788 default:
789 close(s);
790 cmdfd = m;
791 signal(SIGCHLD, sigchld);
792 if(opt_io && !(fileio = fopen(opt_io, "w"))) {
793 fprintf(stderr, "Error opening %s:%s\n",
794 opt_io, strerror(errno));
795 }
796 }
797 }
798
799 void
800 dump(char c) {
801 static int col;
802 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
803 if(++col % 10 == 0)
804 fprintf(stderr, "\n");
805 }
806
807 void
808 ttyread(void) {
809 static char buf[BUFSIZ];
810 static int buflen = 0;
811 char *ptr;
812 char s[UTF_SIZ];
813 int charsize; /* size of utf8 char in bytes */
814 long utf8c;
815 int ret;
816
817 /* append read bytes to unprocessed bytes */
818 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
819 die("Couldn't read from shell: %s\n", SERRNO);
820
821 /* process every complete utf8 char */
822 buflen += ret;
823 ptr = buf;
824 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
825 charsize = utf8decode(ptr, &utf8c);
826 utf8encode(&utf8c, s);
827 tputc(s);
828 ptr += charsize;
829 buflen -= charsize;
830 }
831
832 /* keep any uncomplete utf8 char for the next call */
833 memmove(buf, ptr, buflen);
834 }
835
836 void
837 ttywrite(const char *s, size_t n) {
838 if(write(cmdfd, s, n) == -1)
839 die("write error on tty: %s\n", SERRNO);
840 }
841
842 void
843 ttyresize(int x, int y) {
844 struct winsize w;
845
846 w.ws_row = term.row;
847 w.ws_col = term.col;
848 w.ws_xpixel = xw.w;
849 w.ws_ypixel = xw.h;
850 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
851 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
852 }
853
854 void
855 tsetdirt(int top, int bot)
856 {
857 int i;
858
859 LIMIT(top, 0, term.row-1);
860 LIMIT(bot, 0, term.row-1);
861
862 for(i = top; i <= bot; i++)
863 term.dirty[i] = 1;
864 }
865
866 void
867 tfulldirt(void)
868 {
869 tsetdirt(0, term.row-1);
870 }
871
872 void
873 tcursor(int mode) {
874 static TCursor c;
875
876 if(mode == CURSOR_SAVE)
877 c = term.c;
878 else if(mode == CURSOR_LOAD)
879 term.c = c, tmoveto(c.x, c.y);
880 }
881
882 void
883 treset(void) {
884 unsigned i;
885 term.c = (TCursor){{
886 .mode = ATTR_NULL,
887 .fg = DefaultFG,
888 .bg = DefaultBG
889 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
890
891 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
892 for(i = TAB; i < term.col; i += TAB)
893 term.tabs[i] = 1;
894 term.top = 0, term.bot = term.row - 1;
895 term.mode = MODE_WRAP;
896 tclearregion(0, 0, term.col-1, term.row-1);
897 }
898
899 void
900 tnew(int col, int row) {
901 /* set screen size */
902 term.row = row, term.col = col;
903 term.line = malloc(term.row * sizeof(Line));
904 term.alt = malloc(term.row * sizeof(Line));
905 term.dirty = malloc(term.row * sizeof(*term.dirty));
906 term.tabs = malloc(term.col * sizeof(*term.tabs));
907
908 for(row = 0; row < term.row; row++) {
909 term.line[row] = malloc(term.col * sizeof(Glyph));
910 term.alt [row] = malloc(term.col * sizeof(Glyph));
911 term.dirty[row] = 0;
912 }
913 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
914 /* setup screen */
915 treset();
916 }
917
918 void
919 tswapscreen(void) {
920 Line* tmp = term.line;
921 term.line = term.alt;
922 term.alt = tmp;
923 term.mode ^= MODE_ALTSCREEN;
924 tfulldirt();
925 }
926
927 void
928 tscrolldown(int orig, int n) {
929 int i;
930 Line temp;
931
932 LIMIT(n, 0, term.bot-orig+1);
933
934 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
935
936 for(i = term.bot; i >= orig+n; i--) {
937 temp = term.line[i];
938 term.line[i] = term.line[i-n];
939 term.line[i-n] = temp;
940
941 term.dirty[i] = 1;
942 term.dirty[i-n] = 1;
943 }
944
945 selscroll(orig, n);
946 }
947
948 void
949 tscrollup(int orig, int n) {
950 int i;
951 Line temp;
952 LIMIT(n, 0, term.bot-orig+1);
953
954 tclearregion(0, orig, term.col-1, orig+n-1);
955
956 for(i = orig; i <= term.bot-n; i++) {
957 temp = term.line[i];
958 term.line[i] = term.line[i+n];
959 term.line[i+n] = temp;
960
961 term.dirty[i] = 1;
962 term.dirty[i+n] = 1;
963 }
964
965 selscroll(orig, -n);
966 }
967
968 void
969 selscroll(int orig, int n) {
970 if(sel.bx == -1)
971 return;
972
973 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
974 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
975 sel.bx = -1;
976 return;
977 }
978 if(sel.by < term.top) {
979 sel.by = term.top;
980 sel.bx = 0;
981 }
982 if(sel.ey > term.bot) {
983 sel.ey = term.bot;
984 sel.ex = term.col;
985 }
986 sel.b.y = sel.by, sel.b.x = sel.bx;
987 sel.e.y = sel.ey, sel.e.x = sel.ex;
988 }
989 }
990
991 void
992 tnewline(int first_col) {
993 int y = term.c.y;
994 if(y == term.bot)
995 tscrollup(term.top, 1);
996 else
997 y++;
998 tmoveto(first_col ? 0 : term.c.x, y);
999 }
1000
1001 void
1002 csiparse(void) {
1003 /* int noarg = 1; */
1004 char *p = csiescseq.buf;
1005
1006 csiescseq.narg = 0;
1007 if(*p == '?')
1008 csiescseq.priv = 1, p++;
1009
1010 while(p < csiescseq.buf+csiescseq.len) {
1011 while(isdigit(*p)) {
1012 csiescseq.arg[csiescseq.narg] *= 10;
1013 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1014 }
1015 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ)
1016 csiescseq.narg++, p++;
1017 else {
1018 csiescseq.mode = *p;
1019 csiescseq.narg++;
1020 return;
1021 }
1022 }
1023 }
1024
1025 void
1026 tmoveto(int x, int y) {
1027 LIMIT(x, 0, term.col-1);
1028 LIMIT(y, 0, term.row-1);
1029 term.c.state &= ~CURSOR_WRAPNEXT;
1030 term.c.x = x;
1031 term.c.y = y;
1032 }
1033
1034 void
1035 tsetchar(char *c) {
1036 term.dirty[term.c.y] = 1;
1037 term.line[term.c.y][term.c.x] = term.c.attr;
1038 memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
1039 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
1040 }
1041
1042 void
1043 tclearregion(int x1, int y1, int x2, int y2) {
1044 int x, y, temp;
1045
1046 if(x1 > x2)
1047 temp = x1, x1 = x2, x2 = temp;
1048 if(y1 > y2)
1049 temp = y1, y1 = y2, y2 = temp;
1050
1051 LIMIT(x1, 0, term.col-1);
1052 LIMIT(x2, 0, term.col-1);
1053 LIMIT(y1, 0, term.row-1);
1054 LIMIT(y2, 0, term.row-1);
1055
1056 for(y = y1; y <= y2; y++) {
1057 term.dirty[y] = 1;
1058 for(x = x1; x <= x2; x++)
1059 term.line[y][x].state = 0;
1060 }
1061 }
1062
1063 void
1064 tdeletechar(int n) {
1065 int src = term.c.x + n;
1066 int dst = term.c.x;
1067 int size = term.col - src;
1068
1069 term.dirty[term.c.y] = 1;
1070
1071 if(src >= term.col) {
1072 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1073 return;
1074 }
1075 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1076 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1077 }
1078
1079 void
1080 tinsertblank(int n) {
1081 int src = term.c.x;
1082 int dst = src + n;
1083 int size = term.col - dst;
1084
1085 term.dirty[term.c.y] = 1;
1086
1087 if(dst >= term.col) {
1088 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1089 return;
1090 }
1091 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1092 tclearregion(src, term.c.y, dst - 1, term.c.y);
1093 }
1094
1095 void
1096 tinsertblankline(int n) {
1097 if(term.c.y < term.top || term.c.y > term.bot)
1098 return;
1099
1100 tscrolldown(term.c.y, n);
1101 }
1102
1103 void
1104 tdeleteline(int n) {
1105 if(term.c.y < term.top || term.c.y > term.bot)
1106 return;
1107
1108 tscrollup(term.c.y, n);
1109 }
1110
1111 void
1112 tsetattr(int *attr, int l) {
1113 int i;
1114
1115 for(i = 0; i < l; i++) {
1116 switch(attr[i]) {
1117 case 0:
1118 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
1119 term.c.attr.fg = DefaultFG;
1120 term.c.attr.bg = DefaultBG;
1121 break;
1122 case 1:
1123 term.c.attr.mode |= ATTR_BOLD;
1124 break;
1125 case 3: /* enter standout (highlight) mode TODO: make it italic */
1126 term.c.attr.mode |= ATTR_REVERSE;
1127 break;
1128 case 4:
1129 term.c.attr.mode |= ATTR_UNDERLINE;
1130 break;
1131 case 7:
1132 term.c.attr.mode |= ATTR_REVERSE;
1133 break;
1134 case 22:
1135 term.c.attr.mode &= ~ATTR_BOLD;
1136 break;
1137 case 23: /* leave standout (highlight) mode TODO: make it italic */
1138 term.c.attr.mode &= ~ATTR_REVERSE;
1139 break;
1140 case 24:
1141 term.c.attr.mode &= ~ATTR_UNDERLINE;
1142 break;
1143 case 27:
1144 term.c.attr.mode &= ~ATTR_REVERSE;
1145 break;
1146 case 38:
1147 if(i + 2 < l && attr[i + 1] == 5) {
1148 i += 2;
1149 if(BETWEEN(attr[i], 0, 255))
1150 term.c.attr.fg = attr[i];
1151 else
1152 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
1153 }
1154 else
1155 fprintf(stderr, "erresc(38): gfx attr %d unknown\n", attr[i]);
1156 break;
1157 case 39:
1158 term.c.attr.fg = DefaultFG;
1159 break;
1160 case 48:
1161 if(i + 2 < l && attr[i + 1] == 5) {
1162 i += 2;
1163 if(BETWEEN(attr[i], 0, 255))
1164 term.c.attr.bg = attr[i];
1165 else
1166 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
1167 }
1168 else
1169 fprintf(stderr, "erresc(48): gfx attr %d unknown\n", attr[i]);
1170 break;
1171 case 49:
1172 term.c.attr.bg = DefaultBG;
1173 break;
1174 default:
1175 if(BETWEEN(attr[i], 30, 37))
1176 term.c.attr.fg = attr[i] - 30;
1177 else if(BETWEEN(attr[i], 40, 47))
1178 term.c.attr.bg = attr[i] - 40;
1179 else if(BETWEEN(attr[i], 90, 97))
1180 term.c.attr.fg = attr[i] - 90 + 8;
1181 else if(BETWEEN(attr[i], 100, 107))
1182 term.c.attr.fg = attr[i] - 100 + 8;
1183 else
1184 fprintf(stderr, "erresc(default): gfx attr %d unknown\n", attr[i]), csidump();
1185 break;
1186 }
1187 }
1188 }
1189
1190 void
1191 tsetscroll(int t, int b) {
1192 int temp;
1193
1194 LIMIT(t, 0, term.row-1);
1195 LIMIT(b, 0, term.row-1);
1196 if(t > b) {
1197 temp = t;
1198 t = b;
1199 b = temp;
1200 }
1201 term.top = t;
1202 term.bot = b;
1203 }
1204
1205 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1206
1207 void
1208 tsetmode(bool priv, bool set, int *args, int narg) {
1209 int *lim, mode;
1210
1211 for(lim = args + narg; args < lim; ++args) {
1212 if(priv) {
1213 switch(*args) {
1214 case 1:
1215 MODBIT(term.mode, set, MODE_APPKEYPAD);
1216 break;
1217 case 5: /* DECSCNM -- Reverve video */
1218 mode = term.mode;
1219 MODBIT(term.mode,set, MODE_REVERSE);
1220 if(mode != term.mode)
1221 redraw();
1222 break;
1223 case 7:
1224 MODBIT(term.mode, set, MODE_WRAP);
1225 break;
1226 case 20:
1227 MODBIT(term.mode, set, MODE_CRLF);
1228 break;
1229 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1230 break;
1231 case 25:
1232 MODBIT(term.c.state, !set, CURSOR_HIDE);
1233 break;
1234 case 1000: /* 1000,1002: enable xterm mouse report */
1235 MODBIT(term.mode, set, MODE_MOUSEBTN);
1236 break;
1237 case 1002:
1238 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1239 break;
1240 case 1049: /* = 1047 and 1048 */
1241 case 47:
1242 case 1047:
1243 if(IS_SET(MODE_ALTSCREEN))
1244 tclearregion(0, 0, term.col-1, term.row-1);
1245 if((set && !IS_SET(MODE_ALTSCREEN)) ||
1246 (!set && IS_SET(MODE_ALTSCREEN))) {
1247 tswapscreen();
1248 }
1249 if(*args != 1049)
1250 break;
1251 /* pass through */
1252 case 1048:
1253 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1254 break;
1255 default:
1256 fprintf(stderr,
1257 "erresc: unknown private set/reset mode %d\n",
1258 *args);
1259 break;
1260 }
1261 } else {
1262 switch(*args) {
1263 case 4:
1264 MODBIT(term.mode, set, MODE_INSERT);
1265 break;
1266 default:
1267 fprintf(stderr,
1268 "erresc: unknown set/reset mode %d\n",
1269 *args);
1270 break;
1271 }
1272 }
1273 }
1274 }
1275 #undef MODBIT
1276
1277
1278 void
1279 csihandle(void) {
1280 switch(csiescseq.mode) {
1281 default:
1282 unknown:
1283 fprintf(stderr, "erresc: unknown csi ");
1284 csidump();
1285 /* die(""); */
1286 break;
1287 case '@': /* ICH -- Insert <n> blank char */
1288 DEFAULT(csiescseq.arg[0], 1);
1289 tinsertblank(csiescseq.arg[0]);
1290 break;
1291 case 'A': /* CUU -- Cursor <n> Up */
1292 case 'e':
1293 DEFAULT(csiescseq.arg[0], 1);
1294 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1295 break;
1296 case 'B': /* CUD -- Cursor <n> Down */
1297 DEFAULT(csiescseq.arg[0], 1);
1298 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1299 break;
1300 case 'C': /* CUF -- Cursor <n> Forward */
1301 case 'a':
1302 DEFAULT(csiescseq.arg[0], 1);
1303 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1304 break;
1305 case 'D': /* CUB -- Cursor <n> Backward */
1306 DEFAULT(csiescseq.arg[0], 1);
1307 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1308 break;
1309 case 'E': /* CNL -- Cursor <n> Down and first col */
1310 DEFAULT(csiescseq.arg[0], 1);
1311 tmoveto(0, term.c.y+csiescseq.arg[0]);
1312 break;
1313 case 'F': /* CPL -- Cursor <n> Up and first col */
1314 DEFAULT(csiescseq.arg[0], 1);
1315 tmoveto(0, term.c.y-csiescseq.arg[0]);
1316 break;
1317 case 'g': /* TBC -- Tabulation clear */
1318 switch (csiescseq.arg[0]) {
1319 case 0: /* clear current tab stop */
1320 term.tabs[term.c.x] = 0;
1321 break;
1322 case 3: /* clear all the tabs */
1323 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1324 break;
1325 default:
1326 goto unknown;
1327 }
1328 break;
1329 case 'G': /* CHA -- Move to <col> */
1330 case '`': /* HPA */
1331 DEFAULT(csiescseq.arg[0], 1);
1332 tmoveto(csiescseq.arg[0]-1, term.c.y);
1333 break;
1334 case 'H': /* CUP -- Move to <row> <col> */
1335 case 'f': /* HVP */
1336 DEFAULT(csiescseq.arg[0], 1);
1337 DEFAULT(csiescseq.arg[1], 1);
1338 tmoveto(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1339 break;
1340 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1341 DEFAULT(csiescseq.arg[0], 1);
1342 while(csiescseq.arg[0]--)
1343 tputtab(1);
1344 break;
1345 case 'J': /* ED -- Clear screen */
1346 sel.bx = -1;
1347 switch(csiescseq.arg[0]) {
1348 case 0: /* below */
1349 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1350 if(term.c.y < term.row-1)
1351 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1352 break;
1353 case 1: /* above */
1354 if(term.c.y > 1)
1355 tclearregion(0, 0, term.col-1, term.c.y-1);
1356 tclearregion(0, term.c.y, term.c.x, term.c.y);
1357 break;
1358 case 2: /* all */
1359 tclearregion(0, 0, term.col-1, term.row-1);
1360 break;
1361 default:
1362 goto unknown;
1363 }
1364 break;
1365 case 'K': /* EL -- Clear line */
1366 switch(csiescseq.arg[0]) {
1367 case 0: /* right */
1368 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1369 break;
1370 case 1: /* left */
1371 tclearregion(0, term.c.y, term.c.x, term.c.y);
1372 break;
1373 case 2: /* all */
1374 tclearregion(0, term.c.y, term.col-1, term.c.y);
1375 break;
1376 }
1377 break;
1378 case 'S': /* SU -- Scroll <n> line up */
1379 DEFAULT(csiescseq.arg[0], 1);
1380 tscrollup(term.top, csiescseq.arg[0]);
1381 break;
1382 case 'T': /* SD -- Scroll <n> line down */
1383 DEFAULT(csiescseq.arg[0], 1);
1384 tscrolldown(term.top, csiescseq.arg[0]);
1385 break;
1386 case 'L': /* IL -- Insert <n> blank lines */
1387 DEFAULT(csiescseq.arg[0], 1);
1388 tinsertblankline(csiescseq.arg[0]);
1389 break;
1390 case 'l': /* RM -- Reset Mode */
1391 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1392 break;
1393 case 'M': /* DL -- Delete <n> lines */
1394 DEFAULT(csiescseq.arg[0], 1);
1395 tdeleteline(csiescseq.arg[0]);
1396 break;
1397 case 'X': /* ECH -- Erase <n> char */
1398 DEFAULT(csiescseq.arg[0], 1);
1399 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
1400 break;
1401 case 'P': /* DCH -- Delete <n> char */
1402 DEFAULT(csiescseq.arg[0], 1);
1403 tdeletechar(csiescseq.arg[0]);
1404 break;
1405 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1406 DEFAULT(csiescseq.arg[0], 1);
1407 while(csiescseq.arg[0]--)
1408 tputtab(0);
1409 break;
1410 case 'd': /* VPA -- Move to <row> */
1411 DEFAULT(csiescseq.arg[0], 1);
1412 tmoveto(term.c.x, csiescseq.arg[0]-1);
1413 break;
1414 case 'h': /* SM -- Set terminal mode */
1415 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1416 break;
1417 case 'm': /* SGR -- Terminal attribute (color) */
1418 tsetattr(csiescseq.arg, csiescseq.narg);
1419 break;
1420 case 'r': /* DECSTBM -- Set Scrolling Region */
1421 if(csiescseq.priv)
1422 goto unknown;
1423 else {
1424 DEFAULT(csiescseq.arg[0], 1);
1425 DEFAULT(csiescseq.arg[1], term.row);
1426 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1427 tmoveto(0, 0);
1428 }
1429 break;
1430 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1431 tcursor(CURSOR_SAVE);
1432 break;
1433 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1434 tcursor(CURSOR_LOAD);
1435 break;
1436 }
1437 }
1438
1439 void
1440 csidump(void) {
1441 int i;
1442 printf("ESC[");
1443 for(i = 0; i < csiescseq.len; i++) {
1444 uint c = csiescseq.buf[i] & 0xff;
1445 if(isprint(c)) putchar(c);
1446 else if(c == '\n') printf("(\\n)");
1447 else if(c == '\r') printf("(\\r)");
1448 else if(c == 0x1b) printf("(\\e)");
1449 else printf("(%02x)", c);
1450 }
1451 putchar('\n');
1452 }
1453
1454 void
1455 csireset(void) {
1456 memset(&csiescseq, 0, sizeof(csiescseq));
1457 }
1458
1459 void
1460 strhandle(void) {
1461 char *p;
1462
1463 /*
1464 * TODO: make this being useful in case of color palette change.
1465 */
1466 strparse();
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
1556 if(fileio)
1557 putc(ascii, fileio);
1558
1559 if(term.esc & ESC_START) {
1560 if(term.esc & ESC_CSI) {
1561 csiescseq.buf[csiescseq.len++] = ascii;
1562 if(BETWEEN(ascii, 0x40, 0x7E) || csiescseq.len >= ESC_BUF_SIZ) {
1563 term.esc = 0;
1564 csiparse(), csihandle();
1565 }
1566 } else if(term.esc & ESC_STR) {
1567 switch(ascii) {
1568 case '\033':
1569 term.esc = ESC_START | ESC_STR_END;
1570 break;
1571 case '\a': /* backwards compatibility to xterm */
1572 term.esc = 0;
1573 strhandle();
1574 break;
1575 default:
1576 strescseq.buf[strescseq.len++] = ascii;
1577 if(strescseq.len+1 >= STR_BUF_SIZ) {
1578 term.esc = 0;
1579 strhandle();
1580 }
1581 }
1582 } else if(term.esc & ESC_STR_END) {
1583 term.esc = 0;
1584 if(ascii == '\\')
1585 strhandle();
1586 } else if(term.esc & ESC_ALTCHARSET) {
1587 switch(ascii) {
1588 case '0': /* Line drawing crap */
1589 term.c.attr.mode |= ATTR_GFX;
1590 break;
1591 case 'B': /* Back to regular text */
1592 term.c.attr.mode &= ~ATTR_GFX;
1593 break;
1594 default:
1595 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1596 }
1597 term.esc = 0;
1598 } else {
1599 switch(ascii) {
1600 case '[':
1601 term.esc |= ESC_CSI;
1602 break;
1603 case 'P': /* DCS -- Device Control String */
1604 case '_': /* APC -- Application Program Command */
1605 case '^': /* PM -- Privacy Message */
1606 case ']': /* OSC -- Operating System Command */
1607 strreset();
1608 strescseq.type = ascii;
1609 term.esc |= ESC_STR;
1610 break;
1611 case '(':
1612 term.esc |= ESC_ALTCHARSET;
1613 break;
1614 case 'D': /* IND -- Linefeed */
1615 if(term.c.y == term.bot)
1616 tscrollup(term.top, 1);
1617 else
1618 tmoveto(term.c.x, term.c.y+1);
1619 term.esc = 0;
1620 break;
1621 case 'E': /* NEL -- Next line */
1622 tnewline(1); /* always go to first col */
1623 term.esc = 0;
1624 break;
1625 case 'H': /* HTS -- Horizontal tab stop */
1626 term.tabs[term.c.x] = 1;
1627 term.esc = 0;
1628 break;
1629 case 'M': /* RI -- Reverse index */
1630 if(term.c.y == term.top)
1631 tscrolldown(term.top, 1);
1632 else
1633 tmoveto(term.c.x, term.c.y-1);
1634 term.esc = 0;
1635 break;
1636 case 'c': /* RIS -- Reset to inital state */
1637 treset();
1638 term.esc = 0;
1639 break;
1640 case '=': /* DECPAM -- Application keypad */
1641 term.mode |= MODE_APPKEYPAD;
1642 term.esc = 0;
1643 break;
1644 case '>': /* DECPNM -- Normal keypad */
1645 term.mode &= ~MODE_APPKEYPAD;
1646 term.esc = 0;
1647 break;
1648 case '7': /* DECSC -- Save Cursor */
1649 tcursor(CURSOR_SAVE);
1650 term.esc = 0;
1651 break;
1652 case '8': /* DECRC -- Restore Cursor */
1653 tcursor(CURSOR_LOAD);
1654 term.esc = 0;
1655 break;
1656 case '\\': /* ST -- Stop */
1657 term.esc = 0;
1658 break;
1659 default:
1660 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
1661 (uchar) ascii, isprint(ascii)?ascii:'.');
1662 term.esc = 0;
1663 }
1664 }
1665 } else {
1666 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
1667 sel.bx = -1;
1668 switch(ascii) {
1669 case '\t':
1670 tputtab(1);
1671 break;
1672 case '\b':
1673 tmoveto(term.c.x-1, term.c.y);
1674 break;
1675 case '\r':
1676 tmoveto(0, term.c.y);
1677 break;
1678 case '\f':
1679 case '\v':
1680 case '\n':
1681 /* go to first col if the mode is set */
1682 tnewline(IS_SET(MODE_CRLF));
1683 break;
1684 case '\a':
1685 if(!(xw.state & WIN_FOCUSED))
1686 xseturgency(1);
1687 break;
1688 case '\033':
1689 csireset();
1690 term.esc = ESC_START;
1691 break;
1692 default:
1693 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1694 tnewline(1); /* always go to first col */
1695 tsetchar(c);
1696 if(term.c.x+1 < term.col)
1697 tmoveto(term.c.x+1, term.c.y);
1698 else
1699 term.c.state |= CURSOR_WRAPNEXT;
1700 }
1701 }
1702 }
1703
1704 int
1705 tresize(int col, int row) {
1706 int i, x;
1707 int minrow = MIN(row, term.row);
1708 int mincol = MIN(col, term.col);
1709 int slide = term.c.y - row + 1;
1710
1711 if(col < 1 || row < 1)
1712 return 0;
1713
1714 /* free unneeded rows */
1715 i = 0;
1716 if(slide > 0) {
1717 /* slide screen to keep cursor where we expect it -
1718 * tscrollup would work here, but we can optimize to
1719 * memmove because we're freeing the earlier lines */
1720 for(/* i = 0 */; i < slide; i++) {
1721 free(term.line[i]);
1722 free(term.alt[i]);
1723 }
1724 memmove(term.line, term.line + slide, row * sizeof(Line));
1725 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1726 }
1727 for(i += row; i < term.row; i++) {
1728 free(term.line[i]);
1729 free(term.alt[i]);
1730 }
1731
1732 /* resize to new height */
1733 term.line = realloc(term.line, row * sizeof(Line));
1734 term.alt = realloc(term.alt, row * sizeof(Line));
1735 term.dirty = realloc(term.dirty, row * sizeof(*term.dirty));
1736 term.tabs = realloc(term.tabs, col * sizeof(*term.tabs));
1737
1738 /* resize each row to new width, zero-pad if needed */
1739 for(i = 0; i < minrow; i++) {
1740 term.dirty[i] = 1;
1741 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
1742 term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
1743 for(x = mincol; x < col; x++) {
1744 term.line[i][x].state = 0;
1745 term.alt[i][x].state = 0;
1746 }
1747 }
1748
1749 /* allocate any new rows */
1750 for(/* i == minrow */; i < row; i++) {
1751 term.dirty[i] = 1;
1752 term.line[i] = calloc(col, sizeof(Glyph));
1753 term.alt [i] = calloc(col, sizeof(Glyph));
1754 }
1755 if(col > term.col) {
1756 bool *bp = term.tabs + term.col;
1757
1758 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
1759 while(--bp > term.tabs && !*bp)
1760 /* nothing */ ;
1761 for(bp += TAB; bp < term.tabs + col; bp += TAB)
1762 *bp = 1;
1763 }
1764 /* update terminal size */
1765 term.col = col, term.row = row;
1766 /* make use of the LIMIT in tmoveto */
1767 tmoveto(term.c.x, term.c.y);
1768 /* reset scrolling region */
1769 tsetscroll(0, row-1);
1770
1771 return (slide > 0);
1772 }
1773
1774 void
1775 xresize(int col, int row) {
1776 xw.w = MAX(1, 2*BORDER + col * xw.cw);
1777 xw.h = MAX(1, 2*BORDER + row * xw.ch);
1778 }
1779
1780 void
1781 xloadcols(void) {
1782 int i, r, g, b;
1783 XColor color;
1784 ulong white = WhitePixel(xw.dpy, xw.scr);
1785
1786 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
1787 for(i = 0; i < LEN(colorname); i++) {
1788 if(!colorname[i])
1789 continue;
1790 if(!XAllocNamedColor(xw.dpy, xw.cmap, colorname[i], &color, &color)) {
1791 dc.col[i] = white;
1792 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1793 } else
1794 dc.col[i] = color.pixel;
1795 }
1796
1797 /* load colors [16-255] ; same colors as xterm */
1798 for(i = 16, r = 0; r < 6; r++)
1799 for(g = 0; g < 6; g++)
1800 for(b = 0; b < 6; b++) {
1801 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1802 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1803 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1804 if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
1805 dc.col[i] = white;
1806 fprintf(stderr, "Could not allocate color %d\n", i);
1807 } else
1808 dc.col[i] = color.pixel;
1809 i++;
1810 }
1811
1812 for(r = 0; r < 24; r++, i++) {
1813 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1814 if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
1815 dc.col[i] = white;
1816 fprintf(stderr, "Could not allocate color %d\n", i);
1817 } else
1818 dc.col[i] = color.pixel;
1819 }
1820 }
1821
1822 void
1823 xclear(int x1, int y1, int x2, int y2) {
1824 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
1825 XFillRectangle(xw.dpy, xw.buf, dc.gc,
1826 BORDER + x1 * xw.cw, BORDER + y1 * xw.ch,
1827 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1828 }
1829
1830 void
1831 xhints(void) {
1832 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
1833 XWMHints wm = {.flags = InputHint, .input = 1};
1834 XSizeHints *sizeh = NULL;
1835
1836 sizeh = XAllocSizeHints();
1837 if(xw.isfixed == False) {
1838 sizeh->flags = PSize | PResizeInc | PBaseSize;
1839 sizeh->height = xw.h;
1840 sizeh->width = xw.w;
1841 sizeh->height_inc = xw.ch;
1842 sizeh->width_inc = xw.cw;
1843 sizeh->base_height = 2*BORDER;
1844 sizeh->base_width = 2*BORDER;
1845 } else {
1846 sizeh->flags = PMaxSize | PMinSize;
1847 sizeh->min_width = sizeh->max_width = xw.fw;
1848 sizeh->min_height = sizeh->max_height = xw.fh;
1849 }
1850
1851 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
1852 XFree(sizeh);
1853 }
1854
1855 XFontSet
1856 xinitfont(char *fontstr) {
1857 XFontSet set;
1858 char *def, **missing;
1859 int n;
1860
1861 missing = NULL;
1862 set = XCreateFontSet(xw.dpy, fontstr, &missing, &n, &def);
1863 if(missing) {
1864 while(n--)
1865 fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
1866 XFreeStringList(missing);
1867 }
1868 return set;
1869 }
1870
1871 void
1872 xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing) {
1873 XFontStruct **xfonts;
1874 char **font_names;
1875 int i, n;
1876
1877 *ascent = *descent = *lbearing = *rbearing = 0;
1878 n = XFontsOfFontSet(set, &xfonts, &font_names);
1879 for(i = 0; i < n; i++) {
1880 *ascent = MAX(*ascent, (*xfonts)->ascent);
1881 *descent = MAX(*descent, (*xfonts)->descent);
1882 *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
1883 *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
1884 xfonts++;
1885 }
1886 }
1887
1888 void
1889 initfonts(char *fontstr, char *bfontstr) {
1890 if((dc.font.set = xinitfont(fontstr)) == NULL ||
1891 (dc.bfont.set = xinitfont(bfontstr)) == NULL)
1892 die("Can't load font %s\n", dc.font.set ? BOLDFONT : FONT);
1893 xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
1894 &dc.font.lbearing, &dc.font.rbearing);
1895 xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
1896 &dc.bfont.lbearing, &dc.bfont.rbearing);
1897 }
1898
1899 void
1900 xinit(void) {
1901 XSetWindowAttributes attrs;
1902 Cursor cursor;
1903 Window parent;
1904 int sw, sh;
1905
1906 if(!(xw.dpy = XOpenDisplay(NULL)))
1907 die("Can't open display\n");
1908 xw.scr = XDefaultScreen(xw.dpy);
1909
1910 /* adjust fixed window geometry */
1911 if(xw.isfixed) {
1912 sw = DisplayWidth(xw.dpy, xw.scr);
1913 sh = DisplayHeight(xw.dpy, xw.scr);
1914 if(xw.fx < 0)
1915 xw.fx = sw + xw.fx - xw.fw - 1;
1916 if(xw.fy < 0)
1917 xw.fy = sh + xw.fy - xw.fh - 1;
1918
1919 xw.h = xw.fh;
1920 xw.w = xw.fw;
1921 } else {
1922 /* window - default size */
1923 xw.h = 2*BORDER + term.row * xw.ch;
1924 xw.w = 2*BORDER + term.col * xw.cw;
1925 xw.fx = 0;
1926 xw.fy = 0;
1927 }
1928
1929 /* font */
1930 initfonts(FONT, BOLDFONT);
1931
1932 /* XXX: Assuming same size for bold font */
1933 xw.cw = dc.font.rbearing - dc.font.lbearing;
1934 xw.ch = dc.font.ascent + dc.font.descent;
1935
1936 /* colors */
1937 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1938 xloadcols();
1939
1940 attrs.background_pixel = dc.col[DefaultBG];
1941 attrs.border_pixel = dc.col[DefaultBG];
1942 attrs.bit_gravity = NorthWestGravity;
1943 attrs.event_mask = FocusChangeMask | KeyPressMask
1944 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1945 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask
1946 | EnterWindowMask | LeaveWindowMask;
1947 attrs.colormap = xw.cmap;
1948
1949 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
1950 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
1951 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
1952 XDefaultVisual(xw.dpy, xw.scr),
1953 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
1954 | CWColormap,
1955 &attrs);
1956 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
1957
1958
1959 /* input methods */
1960 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
1961 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
1962 | XIMStatusNothing, XNClientWindow, xw.win,
1963 XNFocusWindow, xw.win, NULL);
1964 /* gc */
1965 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
1966
1967 /* white cursor, black outline */
1968 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
1969 XDefineCursor(xw.dpy, xw.win, cursor);
1970 XRecolorCursor(xw.dpy, cursor,
1971 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
1972 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
1973
1974 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
1975
1976 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
1977 XMapWindow(xw.dpy, xw.win);
1978 xhints();
1979 XSync(xw.dpy, 0);
1980 }
1981
1982 void
1983 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
1984 int fg = base.fg, bg = base.bg, temp;
1985 int winx = BORDER+x*xw.cw, winy = BORDER+y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
1986 XFontSet fontset = dc.font.set;
1987 int i;
1988
1989 /* only switch default fg/bg if term is in RV mode */
1990 if(IS_SET(MODE_REVERSE)) {
1991 if(fg == DefaultFG)
1992 fg = DefaultBG;
1993 if(bg == DefaultBG)
1994 bg = DefaultFG;
1995 }
1996
1997 if(base.mode & ATTR_REVERSE)
1998 temp = fg, fg = bg, bg = temp;
1999
2000 if(base.mode & ATTR_BOLD) {
2001 fg += 8;
2002 fontset = dc.bfont.set;
2003 }
2004
2005 XSetBackground(xw.dpy, dc.gc, dc.col[bg]);
2006 XSetForeground(xw.dpy, dc.gc, dc.col[fg]);
2007
2008 if(base.mode & ATTR_GFX) {
2009 for(i = 0; i < bytelen; i++) {
2010 char c = gfx[(uint)s[i] % 256];
2011 if(c)
2012 s[i] = c;
2013 else if(s[i] > 0x5f)
2014 s[i] -= 0x5f;
2015 }
2016 }
2017
2018 XmbDrawImageString(xw.dpy, xw.buf, fontset, dc.gc, winx, winy, s, bytelen);
2019
2020 if(base.mode & ATTR_UNDERLINE)
2021 XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
2022 }
2023
2024 /* copy buffer pixmap to screen pixmap */
2025 void
2026 xcopy() {
2027 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2028 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2029
2030 }
2031
2032 void
2033 xdrawcursor(void) {
2034 static int oldx = 0;
2035 static int oldy = 0;
2036 int sl;
2037 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
2038
2039 LIMIT(oldx, 0, term.col-1);
2040 LIMIT(oldy, 0, term.row-1);
2041
2042 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2043 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2044
2045 /* remove the old cursor */
2046 if(term.line[oldy][oldx].state & GLYPH_SET) {
2047 sl = utf8size(term.line[oldy][oldx].c);
2048 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
2049 } else
2050 xclear(oldx, oldy, oldx, oldy);
2051
2052 xcopy(oldx, oldy, 1, 1);
2053
2054 /* draw the new one */
2055 if(!(term.c.state & CURSOR_HIDE)) {
2056 if(!(xw.state & WIN_FOCUSED))
2057 g.bg = DefaultUCS;
2058
2059 if(IS_SET(MODE_REVERSE))
2060 g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
2061
2062 sl = utf8size(g.c);
2063 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2064 oldx = term.c.x, oldy = term.c.y;
2065 }
2066
2067 xcopy(term.c.x, term.c.y, 1, 1);
2068 }
2069
2070 void
2071 redraw(void) {
2072 struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
2073 tfulldirt();
2074 draw();
2075 nanosleep(&tv, NULL);
2076 }
2077
2078 void
2079 draw() {
2080 drawregion(0, 0, term.col, term.row);
2081 xcopy();
2082 gettimeofday(&xw.lastdraw, NULL);
2083 }
2084
2085 void
2086 drawregion(int x1, int y1, int x2, int y2) {
2087 int ic, ib, x, y, ox, sl;
2088 Glyph base, new;
2089 char buf[DRAW_BUF_SIZ];
2090 bool ena_sel = sel.bx != -1, alt = IS_SET(MODE_ALTSCREEN);
2091
2092 if((sel.alt && !alt) || (!sel.alt && alt))
2093 ena_sel = 0;
2094 if(!(xw.state & WIN_VISIBLE))
2095 return;
2096
2097 for(y = y1; y < y2; y++) {
2098 if(!term.dirty[y])
2099 continue;
2100 xclear(0, y, term.col, y);
2101 term.dirty[y] = 0;
2102 base = term.line[y][0];
2103 ic = ib = ox = 0;
2104 for(x = x1; x < x2; x++) {
2105 new = term.line[y][x];
2106 if(ena_sel && *(new.c) && selected(x, y))
2107 new.mode ^= ATTR_REVERSE;
2108 if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
2109 ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2110 xdraws(buf, base, ox, y, ic, ib);
2111 ic = ib = 0;
2112 }
2113 if(new.state & GLYPH_SET) {
2114 if(ib == 0) {
2115 ox = x;
2116 base = new;
2117 }
2118 sl = utf8size(new.c);
2119 memcpy(buf+ib, new.c, sl);
2120 ib += sl;
2121 ++ic;
2122 }
2123 }
2124 if(ib > 0)
2125 xdraws(buf, base, ox, y, ic, ib);
2126 }
2127 xdrawcursor();
2128 }
2129
2130 void
2131 expose(XEvent *ev) {
2132 XExposeEvent *e = &ev->xexpose;
2133 if(xw.state & WIN_REDRAW) {
2134 if(!e->count)
2135 xw.state &= ~WIN_REDRAW;
2136 }
2137 xcopy();
2138 }
2139
2140 void
2141 visibility(XEvent *ev) {
2142 XVisibilityEvent *e = &ev->xvisibility;
2143 if(e->state == VisibilityFullyObscured)
2144 xw.state &= ~WIN_VISIBLE;
2145 else if(!(xw.state & WIN_VISIBLE))
2146 /* need a full redraw for next Expose, not just a buf copy */
2147 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2148 }
2149
2150 void
2151 unmap(XEvent *ev) {
2152 xw.state &= ~WIN_VISIBLE;
2153 }
2154
2155 void
2156 xseturgency(int add) {
2157 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2158 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2159 XSetWMHints(xw.dpy, xw.win, h);
2160 XFree(h);
2161 }
2162
2163 void
2164 focus(XEvent *ev) {
2165 if(ev->type == FocusIn) {
2166 xw.state |= WIN_FOCUSED;
2167 xseturgency(0);
2168 } else
2169 xw.state &= ~WIN_FOCUSED;
2170 draw();
2171 }
2172
2173 char*
2174 kmap(KeySym k, uint state) {
2175 int i;
2176 state &= ~Mod2Mask;
2177 for(i = 0; i < LEN(key); i++) {
2178 uint mask = key[i].mask;
2179 if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
2180 return (char*)key[i].s;
2181 }
2182 return NULL;
2183 }
2184
2185 void
2186 kpress(XEvent *ev) {
2187 XKeyEvent *e = &ev->xkey;
2188 KeySym ksym;
2189 char buf[32];
2190 char *customkey;
2191 int len;
2192 int meta;
2193 int shift;
2194 Status status;
2195
2196 meta = e->state & Mod1Mask;
2197 shift = e->state & ShiftMask;
2198 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
2199
2200 /* 1. custom keys from config.h */
2201 if((customkey = kmap(ksym, e->state)))
2202 ttywrite(customkey, strlen(customkey));
2203 /* 2. hardcoded (overrides X lookup) */
2204 else
2205 switch(ksym) {
2206 case XK_Up:
2207 case XK_Down:
2208 case XK_Left:
2209 case XK_Right:
2210 /* XXX: shift up/down doesn't work */
2211 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
2212 ttywrite(buf, 3);
2213 break;
2214 case XK_Insert:
2215 if(shift)
2216 selpaste();
2217 break;
2218 case XK_Return:
2219 if(IS_SET(MODE_CRLF))
2220 ttywrite("\r\n", 2);
2221 else
2222 ttywrite("\r", 1);
2223 break;
2224 /* 3. X lookup */
2225 default:
2226 if(len > 0) {
2227 if(meta && len == 1)
2228 ttywrite("\033", 1);
2229 ttywrite(buf, len);
2230 }
2231 break;
2232 }
2233 }
2234
2235 void
2236 cmessage(XEvent *e) {
2237 /* See xembed specs
2238 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2239 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2240 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2241 xw.state |= WIN_FOCUSED;
2242 xseturgency(0);
2243 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2244 xw.state &= ~WIN_FOCUSED;
2245 }
2246 draw();
2247 }
2248 }
2249
2250 void
2251 resize(XEvent *e) {
2252 int col, row;
2253
2254 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2255 return;
2256
2257 xw.w = e->xconfigure.width;
2258 xw.h = e->xconfigure.height;
2259 col = (xw.w - 2*BORDER) / xw.cw;
2260 row = (xw.h - 2*BORDER) / xw.ch;
2261 if(col == term.col && row == term.row)
2262 return;
2263 if(tresize(col, row))
2264 draw();
2265 xresize(col, row);
2266 ttyresize(col, row);
2267 }
2268
2269 bool
2270 last_draw_too_old(void) {
2271 struct timeval now;
2272 gettimeofday(&now, NULL);
2273 return TIMEDIFF(now, xw.lastdraw) >= DRAW_TIMEOUT/1000;
2274 }
2275
2276 void
2277 run(void) {
2278 XEvent ev;
2279 fd_set rfd;
2280 int xfd = XConnectionNumber(xw.dpy);
2281 struct timeval timeout = {0};
2282 bool stuff_to_print = 0;
2283
2284 for(;;) {
2285 FD_ZERO(&rfd);
2286 FD_SET(cmdfd, &rfd);
2287 FD_SET(xfd, &rfd);
2288 timeout.tv_sec = 0;
2289 timeout.tv_usec = SELECT_TIMEOUT;
2290 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, &timeout) < 0) {
2291 if(errno == EINTR)
2292 continue;
2293 die("select failed: %s\n", SERRNO);
2294 }
2295 if(FD_ISSET(cmdfd, &rfd)) {
2296 ttyread();
2297 stuff_to_print = 1;
2298 }
2299
2300 if(stuff_to_print && last_draw_too_old()) {
2301 stuff_to_print = 0;
2302 draw();
2303 }
2304
2305 while(XPending(xw.dpy)) {
2306 XNextEvent(xw.dpy, &ev);
2307 if(XFilterEvent(&ev, xw.win))
2308 continue;
2309 if(handler[ev.type])
2310 (handler[ev.type])(&ev);
2311 }
2312 }
2313 }
2314
2315 int
2316 main(int argc, char *argv[]) {
2317 int i, bitm, xr, yr;
2318 unsigned int wr, hr;
2319
2320 xw.fw = xw.fh = xw.fx = xw.fy = 0;
2321 xw.isfixed = False;
2322
2323 for(i = 1; i < argc; i++) {
2324 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2325 case 't':
2326 if(++i < argc) opt_title = argv[i];
2327 break;
2328 case 'c':
2329 if(++i < argc) opt_class = argv[i];
2330 break;
2331 case 'w':
2332 if(++i < argc) opt_embed = argv[i];
2333 break;
2334 case 'f':
2335 if(++i < argc) opt_io = argv[i];
2336 break;
2337 case 'e':
2338 /* eat every remaining arguments */
2339 if(++i < argc) opt_cmd = &argv[i];
2340 goto run;
2341 case 'g':
2342 if(++i >= argc)
2343 break;
2344
2345 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
2346 if(bitm & XValue)
2347 xw.fx = xr;
2348 if(bitm & YValue)
2349 xw.fy = yr;
2350 if(bitm & WidthValue)
2351 xw.fw = (int)wr;
2352 if(bitm & HeightValue)
2353 xw.fh = (int)hr;
2354 if(bitm & XNegative && xw.fx == 0)
2355 xw.fx = -1;
2356 if(bitm & XNegative && xw.fy == 0)
2357 xw.fy = -1;
2358
2359 if(xw.fh != 0 && xw.fw != 0)
2360 xw.isfixed = True;
2361 break;
2362 case 'v':
2363 default:
2364 die(USAGE);
2365 }
2366 }
2367
2368 run:
2369 setlocale(LC_CTYPE, "");
2370 tnew(80, 24);
2371 ttynew();
2372 xinit();
2373 selinit();
2374 run();
2375 return 0;
2376 }
2377