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add new line glitch to terminfo entry.
[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 <stdio.h>
10 #include <stdlib.h>
11 #include <string.h>
12 #include <signal.h>
13 #include <sys/ioctl.h>
14 #include <sys/select.h>
15 #include <sys/stat.h>
16 #include <sys/types.h>
17 #include <sys/wait.h>
18 #include <unistd.h>
19 #include <X11/Xlib.h>
20 #include <X11/Xatom.h>
21 #include <X11/keysym.h>
22 #include <X11/Xutil.h>
23
24 #if defined(__linux)
25 #include <pty.h>
26 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
27 #include <util.h>
28 #elif defined(__FreeBSD__) || defined(__DragonFly__)
29 #include <libutil.h>
30 #endif
31
32 #define USAGE \
33 "st-" VERSION ", (c) 2010 st engineers\n" \
34 "usage: st [-t title] [-c class] [-e cmd] [-v]\n"
35
36 /* Arbitrary sizes */
37 #define ESC_TITLE_SIZ 256
38 #define ESC_BUF_SIZ 256
39 #define ESC_ARG_SIZ 16
40 #define DRAW_BUF_SIZ 1024
41 #define UTF_SIZ 4
42
43 #define SERRNO strerror(errno)
44 #define MIN(a, b) ((a) < (b) ? (a) : (b))
45 #define MAX(a, b) ((a) < (b) ? (b) : (a))
46 #define LEN(a) (sizeof(a) / sizeof(a[0]))
47 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
48 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
49 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
50 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
51 #define IS_SET(flag) (term.mode & (flag))
52
53 /* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
54 enum { ATTR_NULL=0 , ATTR_REVERSE=1 , ATTR_UNDERLINE=2, ATTR_BOLD=4, ATTR_GFX=8 };
55 enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT,
56 CURSOR_SAVE, CURSOR_LOAD };
57 enum { CURSOR_DEFAULT = 0, CURSOR_HIDE = 1, CURSOR_WRAPNEXT = 2 };
58 enum { GLYPH_SET=1, GLYPH_DIRTY=2 };
59 enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4, MODE_ALTSCREEN=8,
60 MODE_CRLF=16 };
61 enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
62 enum { SCREEN_UPDATE, SCREEN_REDRAW };
63 enum { WIN_VISIBLE=1, WIN_REDRAW=2, WIN_FOCUSED=4 };
64
65 #undef B0
66 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
67
68 typedef struct {
69 char c[UTF_SIZ]; /* character code */
70 char mode; /* attribute flags */
71 int fg; /* foreground */
72 int bg; /* background */
73 char state; /* state flags */
74 } Glyph;
75
76 typedef Glyph* Line;
77
78 typedef struct {
79 Glyph attr; /* current char attributes */
80 int x;
81 int y;
82 char state;
83 } TCursor;
84
85 /* CSI Escape sequence structs */
86 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
87 typedef struct {
88 char buf[ESC_BUF_SIZ]; /* raw string */
89 int len; /* raw string length */
90 char priv;
91 int arg[ESC_ARG_SIZ];
92 int narg; /* nb of args */
93 char mode;
94 } CSIEscape;
95
96 /* Internal representation of the screen */
97 typedef struct {
98 int row; /* nb row */
99 int col; /* nb col */
100 Line* line; /* screen */
101 Line* alt; /* alternate screen */
102 TCursor c; /* cursor */
103 int top; /* top scroll limit */
104 int bot; /* bottom scroll limit */
105 int mode; /* terminal mode flags */
106 int esc; /* escape state flags */
107 char title[ESC_TITLE_SIZ];
108 int titlelen;
109 } Term;
110
111 /* Purely graphic info */
112 typedef struct {
113 Display* dpy;
114 Colormap cmap;
115 Window win;
116 Pixmap buf;
117 XIM xim;
118 XIC xic;
119 int scr;
120 int w; /* window width */
121 int h; /* window height */
122 int bufw; /* pixmap width */
123 int bufh; /* pixmap height */
124 int ch; /* char height */
125 int cw; /* char width */
126 char state; /* focus, redraw, visible */
127 } XWindow;
128
129 typedef struct {
130 KeySym k;
131 char s[ESC_BUF_SIZ];
132 } Key;
133
134 /* Drawing Context */
135 typedef struct {
136 unsigned long col[256];
137 GC gc;
138 struct {
139 int ascent;
140 int descent;
141 short lbearing;
142 short rbearing;
143 XFontSet set;
144 } font, bfont;
145 } DC;
146
147 /* TODO: use better name for vars... */
148 typedef struct {
149 int mode;
150 int bx, by;
151 int ex, ey;
152 struct {int x, y;} b, e;
153 char *clip;
154 } Selection;
155
156 #include "config.h"
157
158 static void die(const char *errstr, ...);
159 static void draw(int);
160 static void execsh(void);
161 static void sigchld(int);
162 static void run(void);
163
164 static void csidump(void);
165 static void csihandle(void);
166 static void csiparse(void);
167 static void csireset(void);
168
169 static void tclearregion(int, int, int, int);
170 static void tcursor(int);
171 static void tdeletechar(int);
172 static void tdeleteline(int);
173 static void tinsertblank(int);
174 static void tinsertblankline(int);
175 static void tmoveto(int, int);
176 static void tnew(int, int);
177 static void tnewline(int);
178 static void tputtab(void);
179 static void tputc(char*);
180 static void treset(void);
181 static int tresize(int, int);
182 static void tscrollup(int, int);
183 static void tscrolldown(int, int);
184 static void tsetattr(int*, int);
185 static void tsetchar(char*);
186 static void tsetscroll(int, int);
187 static void tswapscreen(void);
188
189 static void ttynew(void);
190 static void ttyread(void);
191 static void ttyresize(int, int);
192 static void ttywrite(const char *, size_t);
193
194 static void xdraws(char *, Glyph, int, int, int, int);
195 static void xhints(void);
196 static void xclear(int, int, int, int);
197 static void xdrawcursor(void);
198 static void xinit(void);
199 static void xloadcols(void);
200 static void xseturgency(int);
201 static void xsetsel(char*);
202 static void xresize(int, int);
203
204 static void expose(XEvent *);
205 static void visibility(XEvent *);
206 static void unmap(XEvent *);
207 static char* kmap(KeySym);
208 static void kpress(XEvent *);
209 static void resize(XEvent *);
210 static void focus(XEvent *);
211 static void brelease(XEvent *);
212 static void bpress(XEvent *);
213 static void bmotion(XEvent *);
214 static void selnotify(XEvent *);
215 static void selrequest(XEvent *);
216
217 static void selinit(void);
218 static inline int selected(int, int);
219 static void selcopy(void);
220 static void selpaste(void);
221
222 static int utf8decode(char *, long *);
223 static int utf8encode(long *, char *);
224 static int utf8size(char *);
225 static int isfullutf8(char *, int);
226
227 static void (*handler[LASTEvent])(XEvent *) = {
228 [KeyPress] = kpress,
229 [ConfigureNotify] = resize,
230 [VisibilityNotify] = visibility,
231 [UnmapNotify] = unmap,
232 [Expose] = expose,
233 [FocusIn] = focus,
234 [FocusOut] = focus,
235 [MotionNotify] = bmotion,
236 [ButtonPress] = bpress,
237 [ButtonRelease] = brelease,
238 [SelectionNotify] = selnotify,
239 [SelectionRequest] = selrequest,
240 };
241
242 /* Globals */
243 static DC dc;
244 static XWindow xw;
245 static Term term;
246 static CSIEscape escseq;
247 static int cmdfd;
248 static pid_t pid;
249 static Selection sel;
250 static char **opt_cmd = NULL;
251 static char *opt_title = NULL;
252 static char *opt_class = NULL;
253
254 int
255 utf8decode(char *s, long *u) {
256 unsigned char c;
257 int i, n, rtn;
258
259 rtn = 1;
260 c = *s;
261 if(~c&B7) { /* 0xxxxxxx */
262 *u = c;
263 return rtn;
264 } else if((c&(B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
265 *u = c&(B4|B3|B2|B1|B0);
266 n = 1;
267 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
268 *u = c&(B3|B2|B1|B0);
269 n = 2;
270 } else if((c&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
271 *u = c&(B2|B1|B0);
272 n = 3;
273 } else
274 goto invalid;
275 for(i=n,++s; i>0; --i,++rtn,++s) {
276 c = *s;
277 if((c&(B7|B6)) != B7) /* 10xxxxxx */
278 goto invalid;
279 *u <<= 6;
280 *u |= c&(B5|B4|B3|B2|B1|B0);
281 }
282 if((n == 1 && *u < 0x80) ||
283 (n == 2 && *u < 0x800) ||
284 (n == 3 && *u < 0x10000) ||
285 (*u >= 0xD800 && *u <= 0xDFFF))
286 goto invalid;
287 return rtn;
288 invalid:
289 *u = 0xFFFD;
290 return rtn;
291 }
292
293 int
294 utf8encode(long *u, char *s) {
295 unsigned char *sp;
296 unsigned long uc;
297 int i, n;
298
299 sp = (unsigned char*) s;
300 uc = *u;
301 if(uc < 0x80) {
302 *sp = uc; /* 0xxxxxxx */
303 return 1;
304 } else if(*u < 0x800) {
305 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
306 n = 1;
307 } else if(uc < 0x10000) {
308 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
309 n = 2;
310 } else if(uc <= 0x10FFFF) {
311 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
312 n = 3;
313 } else {
314 goto invalid;
315 }
316 for(i=n,++sp; i>0; --i,++sp)
317 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
318 return n+1;
319 invalid:
320 /* U+FFFD */
321 *s++ = '\xEF';
322 *s++ = '\xBF';
323 *s = '\xBD';
324 return 3;
325 }
326
327 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
328 UTF-8 otherwise return 0 */
329 int
330 isfullutf8(char *s, int b) {
331 unsigned char *c1, *c2, *c3;
332
333 c1 = (unsigned char *) s;
334 c2 = (unsigned char *) ++s;
335 c3 = (unsigned char *) ++s;
336 if(b < 1)
337 return 0;
338 else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
339 return 0;
340 else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
341 ((b == 1) ||
342 ((b == 2) && (*c2&(B7|B6)) == B7)))
343 return 0;
344 else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
345 ((b == 1) ||
346 ((b == 2) && (*c2&(B7|B6)) == B7) ||
347 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7)))
348 return 0;
349 else
350 return 1;
351 }
352
353 int
354 utf8size(char *s) {
355 unsigned char c = *s;
356
357 if (~c&B7)
358 return 1;
359 else if ((c&(B7|B6|B5)) == (B7|B6))
360 return 2;
361 else if ((c&(B7|B6|B5|B4)) == (B7|B6|B5))
362 return 3;
363 else
364 return 4;
365 }
366
367 void
368 selinit(void) {
369 sel.mode = 0;
370 sel.bx = -1;
371 sel.clip = NULL;
372 }
373
374 static inline int
375 selected(int x, int y) {
376 if(sel.ey == y && sel.by == y) {
377 int bx = MIN(sel.bx, sel.ex);
378 int ex = MAX(sel.bx, sel.ex);
379 return BETWEEN(x, bx, ex);
380 }
381 return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
382 || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
383 }
384
385 void
386 getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
387 if(b)
388 *b = e->xbutton.button;
389
390 *x = e->xbutton.x/xw.cw;
391 *y = e->xbutton.y/xw.ch;
392 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
393 sel.b.y = MIN(sel.by, sel.ey);
394 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
395 sel.e.y = MAX(sel.by, sel.ey);
396 }
397
398 void
399 bpress(XEvent *e) {
400 sel.mode = 1;
401 sel.ex = sel.bx = e->xbutton.x/xw.cw;
402 sel.ey = sel.by = e->xbutton.y/xw.ch;
403 }
404
405 void
406 selcopy(void) {
407 char *str, *ptr;
408 int x, y, sz, sl, ls = 0;
409
410 if(sel.bx == -1)
411 str = NULL;
412 else {
413 sz = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
414 ptr = str = malloc(sz);
415 for(y = 0; y < term.row; y++) {
416 for(x = 0; x < term.col; x++)
417 if(term.line[y][x].state & GLYPH_SET && (ls = selected(x, y))) {
418 sl = utf8size(term.line[y][x].c);
419 memcpy(ptr, term.line[y][x].c, sl);
420 ptr += sl;
421 }
422 if(ls)
423 *ptr = '\n', ptr++;
424 }
425 *ptr = 0;
426 }
427 xsetsel(str);
428 }
429
430 void
431 selnotify(XEvent *e) {
432 unsigned long nitems;
433 unsigned long ofs, rem;
434 int format;
435 unsigned char *data;
436 Atom type;
437
438 ofs = 0;
439 do {
440 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
441 False, AnyPropertyType, &type, &format,
442 &nitems, &rem, &data)) {
443 fprintf(stderr, "Clipboard allocation failed\n");
444 return;
445 }
446 ttywrite((const char *) data, nitems * format / 8);
447 XFree(data);
448 /* number of 32-bit chunks returned */
449 ofs += nitems * format / 32;
450 } while(rem > 0);
451 }
452
453 void
454 selpaste() {
455 XConvertSelection(xw.dpy, XA_PRIMARY, XA_STRING, XA_PRIMARY, xw.win, CurrentTime);
456 }
457
458 void
459 selrequest(XEvent *e) {
460 XSelectionRequestEvent *xsre;
461 XSelectionEvent xev;
462 Atom xa_targets;
463
464 xsre = (XSelectionRequestEvent *) e;
465 xev.type = SelectionNotify;
466 xev.requestor = xsre->requestor;
467 xev.selection = xsre->selection;
468 xev.target = xsre->target;
469 xev.time = xsre->time;
470 /* reject */
471 xev.property = None;
472
473 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
474 if(xsre->target == xa_targets) {
475 /* respond with the supported type */
476 Atom string = XA_STRING;
477 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
478 XA_ATOM, 32, PropModeReplace,
479 (unsigned char *) &string, 1);
480 xev.property = xsre->property;
481 } else if(xsre->target == XA_STRING) {
482 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
483 xsre->target, 8, PropModeReplace,
484 (unsigned char *) sel.clip, strlen(sel.clip));
485 xev.property = xsre->property;
486 }
487
488 /* all done, send a notification to the listener */
489 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
490 fprintf(stderr, "Error sending SelectionNotify event\n");
491 }
492
493 void
494 xsetsel(char *str) {
495 /* register the selection for both the clipboard and the primary */
496 Atom clipboard;
497
498 free(sel.clip);
499 sel.clip = str;
500
501 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
502
503 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
504 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
505
506 XFlush(xw.dpy);
507 }
508
509 /* TODO: doubleclick to select word */
510 void
511 brelease(XEvent *e) {
512 int b;
513 sel.mode = 0;
514 getbuttoninfo(e, &b, &sel.ex, &sel.ey);
515 if(sel.bx==sel.ex && sel.by==sel.ey) {
516 sel.bx = -1;
517 if(b==2)
518 selpaste();
519 } else {
520 if(b==1)
521 selcopy();
522 }
523 draw(1);
524 }
525
526 void
527 bmotion(XEvent *e) {
528 if (sel.mode) {
529 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
530 /* XXX: draw() can't keep up, disabled for now.
531 selection is visible on button release.
532 draw(1); */
533 }
534 }
535
536 void
537 die(const char *errstr, ...) {
538 va_list ap;
539
540 va_start(ap, errstr);
541 vfprintf(stderr, errstr, ap);
542 va_end(ap);
543 exit(EXIT_FAILURE);
544 }
545
546 void
547 execsh(void) {
548 char **args;
549 char *envshell = getenv("SHELL");
550
551 DEFAULT(envshell, "sh");
552 putenv("TERM="TNAME);
553 args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
554 execvp(args[0], args);
555 exit(EXIT_FAILURE);
556 }
557
558 void
559 sigchld(int a) {
560 int stat = 0;
561 if(waitpid(pid, &stat, 0) < 0)
562 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
563 if(WIFEXITED(stat))
564 exit(WEXITSTATUS(stat));
565 else
566 exit(EXIT_FAILURE);
567 }
568
569 void
570 ttynew(void) {
571 int m, s;
572
573 /* seems to work fine on linux, openbsd and freebsd */
574 struct winsize w = {term.row, term.col, 0, 0};
575 if(openpty(&m, &s, NULL, NULL, &w) < 0)
576 die("openpty failed: %s\n", SERRNO);
577
578 switch(pid = fork()) {
579 case -1:
580 die("fork failed\n");
581 break;
582 case 0:
583 setsid(); /* create a new process group */
584 dup2(s, STDIN_FILENO);
585 dup2(s, STDOUT_FILENO);
586 dup2(s, STDERR_FILENO);
587 if(ioctl(s, TIOCSCTTY, NULL) < 0)
588 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
589 close(s);
590 close(m);
591 execsh();
592 break;
593 default:
594 close(s);
595 cmdfd = m;
596 signal(SIGCHLD, sigchld);
597 }
598 }
599
600 void
601 dump(char c) {
602 static int col;
603 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
604 if(++col % 10 == 0)
605 fprintf(stderr, "\n");
606 }
607
608 void
609 ttyread(void) {
610 static char buf[BUFSIZ];
611 static int buflen = 0;
612 char *ptr;
613 char s[UTF_SIZ];
614 int charsize; /* size of utf8 char in bytes */
615 long utf8c;
616 int ret;
617
618 /* append read bytes to unprocessed bytes */
619 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
620 die("Couldn't read from shell: %s\n", SERRNO);
621
622 /* process every complete utf8 char */
623 buflen += ret;
624 ptr = buf;
625 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
626 charsize = utf8decode(ptr, &utf8c);
627 utf8encode(&utf8c, s);
628 tputc(s);
629 ptr += charsize;
630 buflen -= charsize;
631 }
632
633 /* keep any uncomplete utf8 char for the next call */
634 memmove(buf, ptr, buflen);
635 }
636
637 void
638 ttywrite(const char *s, size_t n) {
639 if(write(cmdfd, s, n) == -1)
640 die("write error on tty: %s\n", SERRNO);
641 }
642
643 void
644 ttyresize(int x, int y) {
645 struct winsize w;
646
647 w.ws_row = term.row;
648 w.ws_col = term.col;
649 w.ws_xpixel = w.ws_ypixel = 0;
650 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
651 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
652 }
653
654 void
655 tcursor(int mode) {
656 static TCursor c;
657
658 if(mode == CURSOR_SAVE)
659 c = term.c;
660 else if(mode == CURSOR_LOAD)
661 term.c = c, tmoveto(c.x, c.y);
662 }
663
664 void
665 treset(void) {
666 term.c = (TCursor){{
667 .mode = ATTR_NULL,
668 .fg = DefaultFG,
669 .bg = DefaultBG
670 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
671
672 term.top = 0, term.bot = term.row - 1;
673 term.mode = MODE_WRAP;
674 tclearregion(0, 0, term.col-1, term.row-1);
675 }
676
677 void
678 tnew(int col, int row) {
679 /* set screen size */
680 term.row = row, term.col = col;
681 term.line = malloc(term.row * sizeof(Line));
682 term.alt = malloc(term.row * sizeof(Line));
683 for(row = 0 ; row < term.row; row++) {
684 term.line[row] = malloc(term.col * sizeof(Glyph));
685 term.alt [row] = malloc(term.col * sizeof(Glyph));
686 }
687 /* setup screen */
688 treset();
689 }
690
691 void
692 tswapscreen(void) {
693 Line* tmp = term.line;
694 term.line = term.alt;
695 term.alt = tmp;
696 term.mode ^= MODE_ALTSCREEN;
697 }
698
699 void
700 tscrolldown(int orig, int n) {
701 int i;
702 Line temp;
703
704 LIMIT(n, 0, term.bot-orig+1);
705
706 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
707
708 for(i = term.bot; i >= orig+n; i--) {
709 temp = term.line[i];
710 term.line[i] = term.line[i-n];
711 term.line[i-n] = temp;
712 }
713 }
714
715 void
716 tscrollup(int orig, int n) {
717 int i;
718 Line temp;
719 LIMIT(n, 0, term.bot-orig+1);
720
721 tclearregion(0, orig, term.col-1, orig+n-1);
722
723 for(i = orig; i <= term.bot-n; i++) {
724 temp = term.line[i];
725 term.line[i] = term.line[i+n];
726 term.line[i+n] = temp;
727 }
728 }
729
730 void
731 tnewline(int first_col) {
732 int y = term.c.y;
733 if(y == term.bot)
734 tscrollup(term.top, 1);
735 else
736 y++;
737 tmoveto(first_col ? 0 : term.c.x, y);
738 }
739
740 void
741 csiparse(void) {
742 /* int noarg = 1; */
743 char *p = escseq.buf;
744
745 escseq.narg = 0;
746 if(*p == '?')
747 escseq.priv = 1, p++;
748
749 while(p < escseq.buf+escseq.len) {
750 while(isdigit(*p)) {
751 escseq.arg[escseq.narg] *= 10;
752 escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
753 }
754 if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
755 escseq.narg++, p++;
756 else {
757 escseq.mode = *p;
758 escseq.narg++;
759 return;
760 }
761 }
762 }
763
764 void
765 tmoveto(int x, int y) {
766 LIMIT(x, 0, term.col-1);
767 LIMIT(y, 0, term.row-1);
768 term.c.state &= ~CURSOR_WRAPNEXT;
769 term.c.x = x;
770 term.c.y = y;
771 }
772
773 void
774 tsetchar(char *c) {
775 term.line[term.c.y][term.c.x] = term.c.attr;
776 memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
777 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
778 }
779
780 void
781 tclearregion(int x1, int y1, int x2, int y2) {
782 int x, y, temp;
783
784 if(x1 > x2)
785 temp = x1, x1 = x2, x2 = temp;
786 if(y1 > y2)
787 temp = y1, y1 = y2, y2 = temp;
788
789 LIMIT(x1, 0, term.col-1);
790 LIMIT(x2, 0, term.col-1);
791 LIMIT(y1, 0, term.row-1);
792 LIMIT(y2, 0, term.row-1);
793
794 for(y = y1; y <= y2; y++)
795 for(x = x1; x <= x2; x++)
796 term.line[y][x].state = 0;
797 }
798
799 void
800 tdeletechar(int n) {
801 int src = term.c.x + n;
802 int dst = term.c.x;
803 int size = term.col - src;
804
805 if(src >= term.col) {
806 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
807 return;
808 }
809 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
810 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
811 }
812
813 void
814 tinsertblank(int n) {
815 int src = term.c.x;
816 int dst = src + n;
817 int size = term.col - dst;
818
819 if(dst >= term.col) {
820 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
821 return;
822 }
823 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
824 tclearregion(src, term.c.y, dst - 1, term.c.y);
825 }
826
827 void
828 tinsertblankline(int n) {
829 if(term.c.y < term.top || term.c.y > term.bot)
830 return;
831
832 tscrolldown(term.c.y, n);
833 }
834
835 void
836 tdeleteline(int n) {
837 if(term.c.y < term.top || term.c.y > term.bot)
838 return;
839
840 tscrollup(term.c.y, n);
841 }
842
843 void
844 tsetattr(int *attr, int l) {
845 int i;
846
847 for(i = 0; i < l; i++) {
848 switch(attr[i]) {
849 case 0:
850 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
851 term.c.attr.fg = DefaultFG;
852 term.c.attr.bg = DefaultBG;
853 break;
854 case 1:
855 term.c.attr.mode |= ATTR_BOLD;
856 break;
857 case 4:
858 term.c.attr.mode |= ATTR_UNDERLINE;
859 break;
860 case 7:
861 term.c.attr.mode |= ATTR_REVERSE;
862 break;
863 case 22:
864 term.c.attr.mode &= ~ATTR_BOLD;
865 break;
866 case 24:
867 term.c.attr.mode &= ~ATTR_UNDERLINE;
868 break;
869 case 27:
870 term.c.attr.mode &= ~ATTR_REVERSE;
871 break;
872 case 38:
873 if (i + 2 < l && attr[i + 1] == 5) {
874 i += 2;
875 if (BETWEEN(attr[i], 0, 255))
876 term.c.attr.fg = attr[i];
877 else
878 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
879 }
880 else
881 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
882 break;
883 case 39:
884 term.c.attr.fg = DefaultFG;
885 break;
886 case 48:
887 if (i + 2 < l && attr[i + 1] == 5) {
888 i += 2;
889 if (BETWEEN(attr[i], 0, 255))
890 term.c.attr.bg = attr[i];
891 else
892 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
893 }
894 else
895 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
896 break;
897 case 49:
898 term.c.attr.bg = DefaultBG;
899 break;
900 default:
901 if(BETWEEN(attr[i], 30, 37))
902 term.c.attr.fg = attr[i] - 30;
903 else if(BETWEEN(attr[i], 40, 47))
904 term.c.attr.bg = attr[i] - 40;
905 else if(BETWEEN(attr[i], 90, 97))
906 term.c.attr.fg = attr[i] - 90 + 8;
907 else if(BETWEEN(attr[i], 100, 107))
908 term.c.attr.fg = attr[i] - 100 + 8;
909 else
910 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]), csidump();
911
912 break;
913 }
914 }
915 }
916
917 void
918 tsetscroll(int t, int b) {
919 int temp;
920
921 LIMIT(t, 0, term.row-1);
922 LIMIT(b, 0, term.row-1);
923 if(t > b) {
924 temp = t;
925 t = b;
926 b = temp;
927 }
928 term.top = t;
929 term.bot = b;
930 }
931
932 void
933 csihandle(void) {
934 switch(escseq.mode) {
935 default:
936 unknown:
937 printf("erresc: unknown csi ");
938 csidump();
939 /* die(""); */
940 break;
941 case '@': /* ICH -- Insert <n> blank char */
942 DEFAULT(escseq.arg[0], 1);
943 tinsertblank(escseq.arg[0]);
944 break;
945 case 'A': /* CUU -- Cursor <n> Up */
946 case 'e':
947 DEFAULT(escseq.arg[0], 1);
948 tmoveto(term.c.x, term.c.y-escseq.arg[0]);
949 break;
950 case 'B': /* CUD -- Cursor <n> Down */
951 DEFAULT(escseq.arg[0], 1);
952 tmoveto(term.c.x, term.c.y+escseq.arg[0]);
953 break;
954 case 'C': /* CUF -- Cursor <n> Forward */
955 case 'a':
956 DEFAULT(escseq.arg[0], 1);
957 tmoveto(term.c.x+escseq.arg[0], term.c.y);
958 break;
959 case 'D': /* CUB -- Cursor <n> Backward */
960 DEFAULT(escseq.arg[0], 1);
961 tmoveto(term.c.x-escseq.arg[0], term.c.y);
962 break;
963 case 'E': /* CNL -- Cursor <n> Down and first col */
964 DEFAULT(escseq.arg[0], 1);
965 tmoveto(0, term.c.y+escseq.arg[0]);
966 break;
967 case 'F': /* CPL -- Cursor <n> Up and first col */
968 DEFAULT(escseq.arg[0], 1);
969 tmoveto(0, term.c.y-escseq.arg[0]);
970 break;
971 case 'G': /* CHA -- Move to <col> */
972 case '`': /* XXX: HPA -- same? */
973 DEFAULT(escseq.arg[0], 1);
974 tmoveto(escseq.arg[0]-1, term.c.y);
975 break;
976 case 'H': /* CUP -- Move to <row> <col> */
977 case 'f': /* XXX: HVP -- same? */
978 DEFAULT(escseq.arg[0], 1);
979 DEFAULT(escseq.arg[1], 1);
980 tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
981 break;
982 /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
983 case 'J': /* ED -- Clear screen */
984 switch(escseq.arg[0]) {
985 case 0: /* below */
986 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
987 if(term.c.y < term.row-1)
988 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
989 break;
990 case 1: /* above */
991 if(term.c.y > 1)
992 tclearregion(0, 0, term.col-1, term.c.y-1);
993 tclearregion(0, term.c.y, term.c.x, term.c.y);
994 break;
995 case 2: /* all */
996 tclearregion(0, 0, term.col-1, term.row-1);
997 break;
998 default:
999 goto unknown;
1000 }
1001 break;
1002 case 'K': /* EL -- Clear line */
1003 switch(escseq.arg[0]) {
1004 case 0: /* right */
1005 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1006 break;
1007 case 1: /* left */
1008 tclearregion(0, term.c.y, term.c.x, term.c.y);
1009 break;
1010 case 2: /* all */
1011 tclearregion(0, term.c.y, term.col-1, term.c.y);
1012 break;
1013 }
1014 break;
1015 case 'S': /* SU -- Scroll <n> line up */
1016 DEFAULT(escseq.arg[0], 1);
1017 tscrollup(term.top, escseq.arg[0]);
1018 break;
1019 case 'T': /* SD -- Scroll <n> line down */
1020 DEFAULT(escseq.arg[0], 1);
1021 tscrolldown(term.top, escseq.arg[0]);
1022 break;
1023 case 'L': /* IL -- Insert <n> blank lines */
1024 DEFAULT(escseq.arg[0], 1);
1025 tinsertblankline(escseq.arg[0]);
1026 break;
1027 case 'l': /* RM -- Reset Mode */
1028 if(escseq.priv) {
1029 switch(escseq.arg[0]) {
1030 case 1:
1031 term.mode &= ~MODE_APPKEYPAD;
1032 break;
1033 case 5: /* TODO: DECSCNM -- Remove reverse video */
1034 break;
1035 case 7:
1036 term.mode &= ~MODE_WRAP;
1037 break;
1038 case 12: /* att610 -- Stop blinking cursor (IGNORED) */
1039 break;
1040 case 20:
1041 term.mode &= ~MODE_CRLF;
1042 break;
1043 case 25:
1044 term.c.state |= CURSOR_HIDE;
1045 break;
1046 case 1049: /* = 1047 and 1048 */
1047 case 1047:
1048 if(IS_SET(MODE_ALTSCREEN)) {
1049 tclearregion(0, 0, term.col-1, term.row-1);
1050 tswapscreen();
1051 }
1052 if(escseq.arg[0] == 1047)
1053 break;
1054 case 1048:
1055 tcursor(CURSOR_LOAD);
1056 break;
1057 default:
1058 goto unknown;
1059 }
1060 } else {
1061 switch(escseq.arg[0]) {
1062 case 4:
1063 term.mode &= ~MODE_INSERT;
1064 break;
1065 default:
1066 goto unknown;
1067 }
1068 }
1069 break;
1070 case 'M': /* DL -- Delete <n> lines */
1071 DEFAULT(escseq.arg[0], 1);
1072 tdeleteline(escseq.arg[0]);
1073 break;
1074 case 'X': /* ECH -- Erase <n> char */
1075 DEFAULT(escseq.arg[0], 1);
1076 tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
1077 break;
1078 case 'P': /* DCH -- Delete <n> char */
1079 DEFAULT(escseq.arg[0], 1);
1080 tdeletechar(escseq.arg[0]);
1081 break;
1082 /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
1083 case 'd': /* VPA -- Move to <row> */
1084 DEFAULT(escseq.arg[0], 1);
1085 tmoveto(term.c.x, escseq.arg[0]-1);
1086 break;
1087 case 'h': /* SM -- Set terminal mode */
1088 if(escseq.priv) {
1089 switch(escseq.arg[0]) {
1090 case 1:
1091 term.mode |= MODE_APPKEYPAD;
1092 break;
1093 case 5: /* DECSCNM -- Reverve video */
1094 /* TODO: set REVERSE on the whole screen (f) */
1095 break;
1096 case 7:
1097 term.mode |= MODE_WRAP;
1098 break;
1099 case 20:
1100 term.mode |= MODE_CRLF;
1101 break;
1102 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1103 /* fallthrough for xterm cvvis = CSI [ ? 12 ; 25 h */
1104 if(escseq.narg > 1 && escseq.arg[1] != 25)
1105 break;
1106 case 25:
1107 term.c.state &= ~CURSOR_HIDE;
1108 break;
1109 case 1049: /* = 1047 and 1048 */
1110 case 1047:
1111 if(IS_SET(MODE_ALTSCREEN))
1112 tclearregion(0, 0, term.col-1, term.row-1);
1113 else
1114 tswapscreen();
1115 if(escseq.arg[0] == 1047)
1116 break;
1117 case 1048:
1118 tcursor(CURSOR_SAVE);
1119 break;
1120 default: goto unknown;
1121 }
1122 } else {
1123 switch(escseq.arg[0]) {
1124 case 4:
1125 term.mode |= MODE_INSERT;
1126 break;
1127 default: goto unknown;
1128 }
1129 };
1130 break;
1131 case 'm': /* SGR -- Terminal attribute (color) */
1132 tsetattr(escseq.arg, escseq.narg);
1133 break;
1134 case 'r': /* DECSTBM -- Set Scrolling Region */
1135 if(escseq.priv)
1136 goto unknown;
1137 else {
1138 DEFAULT(escseq.arg[0], 1);
1139 DEFAULT(escseq.arg[1], term.row);
1140 tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
1141 tmoveto(0, 0);
1142 }
1143 break;
1144 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1145 tcursor(CURSOR_SAVE);
1146 break;
1147 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1148 tcursor(CURSOR_LOAD);
1149 break;
1150 }
1151 }
1152
1153 void
1154 csidump(void) {
1155 int i;
1156 printf("ESC [ %s", escseq.priv ? "? " : "");
1157 if(escseq.narg)
1158 for(i = 0; i < escseq.narg; i++)
1159 printf("%d ", escseq.arg[i]);
1160 if(escseq.mode)
1161 putchar(escseq.mode);
1162 putchar('\n');
1163 }
1164
1165 void
1166 csireset(void) {
1167 memset(&escseq, 0, sizeof(escseq));
1168 }
1169
1170 void
1171 tputtab(void) {
1172 int space = TAB - term.c.x % TAB;
1173 tmoveto(term.c.x + space, term.c.y);
1174 }
1175
1176 void
1177 tputc(char *c) {
1178 char ascii = *c;
1179 if(term.esc & ESC_START) {
1180 if(term.esc & ESC_CSI) {
1181 escseq.buf[escseq.len++] = ascii;
1182 if(BETWEEN(ascii, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
1183 term.esc = 0;
1184 csiparse(), csihandle();
1185 }
1186 /* TODO: handle other OSC */
1187 } else if(term.esc & ESC_OSC) {
1188 if(ascii == ';') {
1189 term.titlelen = 0;
1190 term.esc = ESC_START | ESC_TITLE;
1191 }
1192 } else if(term.esc & ESC_TITLE) {
1193 if(ascii == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
1194 term.esc = 0;
1195 term.title[term.titlelen] = '\0';
1196 XStoreName(xw.dpy, xw.win, term.title);
1197 } else {
1198 term.title[term.titlelen++] = ascii;
1199 }
1200 } else if(term.esc & ESC_ALTCHARSET) {
1201 switch(ascii) {
1202 case '0': /* Line drawing crap */
1203 term.c.attr.mode |= ATTR_GFX;
1204 break;
1205 case 'B': /* Back to regular text */
1206 term.c.attr.mode &= ~ATTR_GFX;
1207 break;
1208 default:
1209 printf("esc unhandled charset: ESC ( %c\n", ascii);
1210 }
1211 term.esc = 0;
1212 } else {
1213 switch(ascii) {
1214 case '[':
1215 term.esc |= ESC_CSI;
1216 break;
1217 case ']':
1218 term.esc |= ESC_OSC;
1219 break;
1220 case '(':
1221 term.esc |= ESC_ALTCHARSET;
1222 break;
1223 case 'D': /* IND -- Linefeed */
1224 if(term.c.y == term.bot)
1225 tscrollup(term.top, 1);
1226 else
1227 tmoveto(term.c.x, term.c.y+1);
1228 term.esc = 0;
1229 break;
1230 case 'E': /* NEL -- Next line */
1231 tnewline(1); /* always go to first col */
1232 term.esc = 0;
1233 break;
1234 case 'M': /* RI -- Reverse index */
1235 if(term.c.y == term.top)
1236 tscrolldown(term.top, 1);
1237 else
1238 tmoveto(term.c.x, term.c.y-1);
1239 term.esc = 0;
1240 break;
1241 case 'c': /* RIS -- Reset to inital state */
1242 treset();
1243 term.esc = 0;
1244 break;
1245 case '=': /* DECPAM -- Application keypad */
1246 term.mode |= MODE_APPKEYPAD;
1247 term.esc = 0;
1248 break;
1249 case '>': /* DECPNM -- Normal keypad */
1250 term.mode &= ~MODE_APPKEYPAD;
1251 term.esc = 0;
1252 break;
1253 case '7': /* DECSC -- Save Cursor */
1254 tcursor(CURSOR_SAVE);
1255 term.esc = 0;
1256 break;
1257 case '8': /* DECRC -- Restore Cursor */
1258 tcursor(CURSOR_LOAD);
1259 term.esc = 0;
1260 break;
1261 default:
1262 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
1263 (unsigned char) ascii, isprint(ascii)?ascii:'.');
1264 term.esc = 0;
1265 }
1266 }
1267 } else {
1268 switch(ascii) {
1269 case '\t':
1270 tputtab();
1271 break;
1272 case '\b':
1273 tmoveto(term.c.x-1, term.c.y);
1274 break;
1275 case '\r':
1276 tmoveto(0, term.c.y);
1277 break;
1278 case '\f':
1279 case '\v':
1280 case '\n':
1281 /* go to first col if the mode is set */
1282 tnewline(IS_SET(MODE_CRLF));
1283 break;
1284 case '\a':
1285 if(!(xw.state & WIN_FOCUSED))
1286 xseturgency(1);
1287 break;
1288 case '\033':
1289 csireset();
1290 term.esc = ESC_START;
1291 break;
1292 default:
1293 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1294 tnewline(1); /* always go to first col */
1295 tsetchar(c);
1296 if(term.c.x+1 < term.col)
1297 tmoveto(term.c.x+1, term.c.y);
1298 else
1299 term.c.state |= CURSOR_WRAPNEXT;
1300 break;
1301 }
1302 }
1303 }
1304
1305 int
1306 tresize(int col, int row) {
1307 int i, x;
1308 int minrow = MIN(row, term.row);
1309 int mincol = MIN(col, term.col);
1310 int slide = term.c.y - row + 1;
1311
1312 if(col < 1 || row < 1)
1313 return 0;
1314
1315 /* free unneeded rows */
1316 i = 0;
1317 if(slide > 0) {
1318 /* slide screen to keep cursor where we expect it -
1319 * tscrollup would work here, but we can optimize to
1320 * memmove because we're freeing the earlier lines */
1321 for(/* i = 0 */; i < slide; i++) {
1322 free(term.line[i]);
1323 free(term.alt[i]);
1324 }
1325 memmove(term.line, term.line + slide, row * sizeof(Line));
1326 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1327 }
1328 for(i += row; i < term.row; i++) {
1329 free(term.line[i]);
1330 free(term.alt[i]);
1331 }
1332
1333 /* resize to new height */
1334 term.line = realloc(term.line, row * sizeof(Line));
1335 term.alt = realloc(term.alt, row * sizeof(Line));
1336
1337 /* resize each row to new width, zero-pad if needed */
1338 for(i = 0; i < minrow; i++) {
1339 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
1340 term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
1341 for(x = mincol; x < col; x++) {
1342 term.line[i][x].state = 0;
1343 term.alt[i][x].state = 0;
1344 }
1345 }
1346
1347 /* allocate any new rows */
1348 for(/* i == minrow */; i < row; i++) {
1349 term.line[i] = calloc(col, sizeof(Glyph));
1350 term.alt [i] = calloc(col, sizeof(Glyph));
1351 }
1352
1353 /* update terminal size */
1354 term.col = col, term.row = row;
1355 /* make use of the LIMIT in tmoveto */
1356 tmoveto(term.c.x, term.c.y);
1357 /* reset scrolling region */
1358 tsetscroll(0, row-1);
1359 return (slide > 0);
1360 }
1361
1362 void
1363 xresize(int col, int row) {
1364 Pixmap newbuf;
1365 int oldw, oldh;
1366
1367 oldw = xw.bufw;
1368 oldh = xw.bufh;
1369 xw.bufw = MAX(1, col * xw.cw);
1370 xw.bufh = MAX(1, row * xw.ch);
1371 newbuf = XCreatePixmap(xw.dpy, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dpy, xw.scr));
1372 XCopyArea(xw.dpy, xw.buf, newbuf, dc.gc, 0, 0, xw.bufw, xw.bufh, 0, 0);
1373 XFreePixmap(xw.dpy, xw.buf);
1374 XSetForeground(xw.dpy, dc.gc, dc.col[DefaultBG]);
1375 if(xw.bufw > oldw)
1376 XFillRectangle(xw.dpy, newbuf, dc.gc, oldw, 0,
1377 xw.bufw-oldw, MIN(xw.bufh, oldh));
1378 else if(xw.bufw < oldw && (BORDER > 0 || xw.w > xw.bufw))
1379 XClearArea(xw.dpy, xw.win, BORDER+xw.bufw, BORDER,
1380 xw.w-xw.bufh-BORDER, BORDER+MIN(xw.bufh, oldh),
1381 False);
1382 if(xw.bufh > oldh)
1383 XFillRectangle(xw.dpy, newbuf, dc.gc, 0, oldh,
1384 xw.bufw, xw.bufh-oldh);
1385 else if(xw.bufh < oldh && (BORDER > 0 || xw.h > xw.bufh))
1386 XClearArea(xw.dpy, xw.win, BORDER, BORDER+xw.bufh,
1387 xw.w-2*BORDER, xw.h-xw.bufh-BORDER,
1388 False);
1389 xw.buf = newbuf;
1390 }
1391
1392 void
1393 xloadcols(void) {
1394 int i, r, g, b;
1395 XColor color;
1396 unsigned long white = WhitePixel(xw.dpy, xw.scr);
1397
1398 for(i = 0; i < 16; i++) {
1399 if (!XAllocNamedColor(xw.dpy, xw.cmap, colorname[i], &color, &color)) {
1400 dc.col[i] = white;
1401 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1402 } else
1403 dc.col[i] = color.pixel;
1404 }
1405
1406 /* same colors as xterm */
1407 for(r = 0; r < 6; r++)
1408 for(g = 0; g < 6; g++)
1409 for(b = 0; b < 6; b++) {
1410 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1411 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1412 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1413 if (!XAllocColor(xw.dpy, xw.cmap, &color)) {
1414 dc.col[i] = white;
1415 fprintf(stderr, "Could not allocate color %d\n", i);
1416 } else
1417 dc.col[i] = color.pixel;
1418 i++;
1419 }
1420
1421 for(r = 0; r < 24; r++, i++) {
1422 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1423 if (!XAllocColor(xw.dpy, xw.cmap, &color)) {
1424 dc.col[i] = white;
1425 fprintf(stderr, "Could not allocate color %d\n", i);
1426 } else
1427 dc.col[i] = color.pixel;
1428 }
1429 }
1430
1431 void
1432 xclear(int x1, int y1, int x2, int y2) {
1433 XSetForeground(xw.dpy, dc.gc, dc.col[DefaultBG]);
1434 XFillRectangle(xw.dpy, xw.buf, dc.gc,
1435 x1 * xw.cw, y1 * xw.ch,
1436 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1437 }
1438
1439 void
1440 xhints(void)
1441 {
1442 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
1443 XWMHints wm = {.flags = InputHint, .input = 1};
1444 XSizeHints size = {
1445 .flags = PSize | PResizeInc | PBaseSize,
1446 .height = xw.h,
1447 .width = xw.w,
1448 .height_inc = xw.ch,
1449 .width_inc = xw.cw,
1450 .base_height = 2*BORDER,
1451 .base_width = 2*BORDER,
1452 };
1453 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1454 }
1455
1456 XFontSet
1457 xinitfont(char *fontstr)
1458 {
1459 XFontSet set;
1460 char *def, **missing;
1461 int n;
1462
1463 missing = NULL;
1464 set = XCreateFontSet(xw.dpy, fontstr, &missing, &n, &def);
1465 if(missing) {
1466 while(n--)
1467 fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
1468 XFreeStringList(missing);
1469 }
1470 return set;
1471 }
1472
1473 void
1474 xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing)
1475 {
1476 XFontStruct **xfonts;
1477 char **font_names;
1478 int i, n;
1479
1480 *ascent = *descent = *lbearing = *rbearing = 0;
1481 n = XFontsOfFontSet(set, &xfonts, &font_names);
1482 for(i = 0; i < n; i++) {
1483 *ascent = MAX(*ascent, (*xfonts)->ascent);
1484 *descent = MAX(*descent, (*xfonts)->descent);
1485 *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
1486 *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
1487 xfonts++;
1488 }
1489 }
1490
1491 void
1492 initfonts(char *fontstr, char *bfontstr)
1493 {
1494 if((dc.font.set = xinitfont(fontstr)) == NULL ||
1495 (dc.bfont.set = xinitfont(bfontstr)) == NULL)
1496 die("Can't load font %s\n", dc.font.set ? BOLDFONT : FONT);
1497 xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
1498 &dc.font.lbearing, &dc.font.rbearing);
1499 xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
1500 &dc.bfont.lbearing, &dc.bfont.rbearing);
1501 }
1502
1503 void
1504 xinit(void) {
1505 XSetWindowAttributes attrs;
1506
1507 if(!(xw.dpy = XOpenDisplay(NULL)))
1508 die("Can't open display\n");
1509 xw.scr = XDefaultScreen(xw.dpy);
1510
1511 /* font */
1512 initfonts(FONT, BOLDFONT);
1513
1514 /* XXX: Assuming same size for bold font */
1515 xw.cw = dc.font.rbearing - dc.font.lbearing;
1516 xw.ch = dc.font.ascent + dc.font.descent;
1517
1518 /* colors */
1519 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1520 xloadcols();
1521
1522 /* window - default size */
1523 xw.bufh = 24 * xw.ch;
1524 xw.bufw = 80 * xw.cw;
1525 xw.h = xw.bufh + 2*BORDER;
1526 xw.w = xw.bufw + 2*BORDER;
1527
1528 attrs.background_pixel = dc.col[DefaultBG];
1529 attrs.border_pixel = dc.col[DefaultBG];
1530 attrs.bit_gravity = NorthWestGravity;
1531 attrs.event_mask = FocusChangeMask | KeyPressMask
1532 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1533 | PointerMotionMask | ButtonPressMask | ButtonReleaseMask;
1534 attrs.colormap = xw.cmap;
1535
1536 xw.win = XCreateWindow(xw.dpy, XRootWindow(xw.dpy, xw.scr), 0, 0,
1537 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
1538 XDefaultVisual(xw.dpy, xw.scr),
1539 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
1540 | CWColormap,
1541 &attrs);
1542 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dpy, xw.scr));
1543
1544
1545 /* input methods */
1546 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
1547 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
1548 | XIMStatusNothing, XNClientWindow, xw.win,
1549 XNFocusWindow, xw.win, NULL);
1550 /* gc */
1551 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
1552
1553 XMapWindow(xw.dpy, xw.win);
1554 xhints();
1555 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
1556 XSync(xw.dpy, 0);
1557 }
1558
1559 void
1560 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
1561 unsigned long xfg, xbg;
1562 int winx = x*xw.cw, winy = y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
1563 int i;
1564
1565 if(base.mode & ATTR_REVERSE)
1566 xfg = dc.col[base.bg], xbg = dc.col[base.fg];
1567 else
1568 xfg = dc.col[base.fg], xbg = dc.col[base.bg];
1569
1570 XSetBackground(xw.dpy, dc.gc, xbg);
1571 XSetForeground(xw.dpy, dc.gc, xfg);
1572
1573 if(base.mode & ATTR_GFX) {
1574 for(i = 0; i < bytelen; i++) {
1575 char c = gfx[(unsigned int)s[i] % 256];
1576 if(c)
1577 s[i] = c;
1578 else if(s[i] > 0x5f)
1579 s[i] -= 0x5f;
1580 }
1581 }
1582
1583 XmbDrawImageString(xw.dpy, xw.buf, base.mode & ATTR_BOLD ? dc.bfont.set : dc.font.set,
1584 dc.gc, winx, winy, s, bytelen);
1585
1586 if(base.mode & ATTR_UNDERLINE)
1587 XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1588 }
1589
1590 void
1591 xdrawcursor(void) {
1592 static int oldx = 0;
1593 static int oldy = 0;
1594 int sl;
1595 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
1596
1597 LIMIT(oldx, 0, term.col-1);
1598 LIMIT(oldy, 0, term.row-1);
1599
1600 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
1601 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
1602
1603 /* remove the old cursor */
1604 if(term.line[oldy][oldx].state & GLYPH_SET) {
1605 sl = utf8size(term.line[oldy][oldx].c);
1606 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
1607 } else
1608 xclear(oldx, oldy, oldx, oldy);
1609
1610 /* draw the new one */
1611 if(!(term.c.state & CURSOR_HIDE) && (xw.state & WIN_FOCUSED)) {
1612 sl = utf8size(g.c);
1613 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
1614 oldx = term.c.x, oldy = term.c.y;
1615 }
1616 }
1617
1618 #ifdef DEBUG
1619 /* basic drawing routines */
1620 void
1621 xdrawc(int x, int y, Glyph g) {
1622 int sl = utf8size(g.c);
1623 XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
1624 XSetBackground(xw.dpy, dc.gc, dc.col[g.bg]);
1625 XSetForeground(xw.dpy, dc.gc, dc.col[g.fg]);
1626 XmbDrawImageString(xw.dpy, xw.buf, g.mode&ATTR_BOLD?dc.bfont.fs:dc.font.fs,
1627 dc.gc, r.x, r.y+dc.font.ascent, g.c, sl);
1628 }
1629
1630 void
1631 draw(int dummy) {
1632 int x, y;
1633
1634 xclear(0, 0, term.col-1, term.row-1);
1635 for(y = 0; y < term.row; y++)
1636 for(x = 0; x < term.col; x++)
1637 if(term.line[y][x].state & GLYPH_SET)
1638 xdrawc(x, y, term.line[y][x]);
1639
1640 xdrawcursor();
1641 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1642 XFlush(xw.dpy);
1643 }
1644
1645 #else
1646 /* optimized drawing routine */
1647 void
1648 draw(int redraw_all) {
1649 int ic, ib, x, y, ox, sl;
1650 Glyph base, new;
1651 char buf[DRAW_BUF_SIZ];
1652
1653 if(!(xw.state & WIN_VISIBLE))
1654 return;
1655
1656 xclear(0, 0, term.col-1, term.row-1);
1657 for(y = 0; y < term.row; y++) {
1658 base = term.line[y][0];
1659 ic = ib = ox = 0;
1660 for(x = 0; x < term.col; x++) {
1661 new = term.line[y][x];
1662 if(sel.bx!=-1 && *(new.c) && selected(x, y))
1663 new.mode ^= ATTR_REVERSE;
1664 if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
1665 ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
1666 xdraws(buf, base, ox, y, ic, ib);
1667 ic = ib = 0;
1668 }
1669 if(new.state & GLYPH_SET) {
1670 if(ib == 0) {
1671 ox = x;
1672 base = new;
1673 }
1674 sl = utf8size(new.c);
1675 memcpy(buf+ib, new.c, sl);
1676 ib += sl;
1677 ++ic;
1678 }
1679 }
1680 if(ib > 0)
1681 xdraws(buf, base, ox, y, ic, ib);
1682 }
1683 xdrawcursor();
1684 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1685 }
1686
1687 #endif
1688
1689 void
1690 expose(XEvent *ev) {
1691 XExposeEvent *e = &ev->xexpose;
1692 if(xw.state & WIN_REDRAW) {
1693 if(!e->count) {
1694 xw.state &= ~WIN_REDRAW;
1695 draw(SCREEN_REDRAW);
1696 }
1697 } else
1698 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, e->x-BORDER, e->y-BORDER,
1699 e->width, e->height, e->x, e->y);
1700 }
1701
1702 void
1703 visibility(XEvent *ev) {
1704 XVisibilityEvent *e = &ev->xvisibility;
1705 if(e->state == VisibilityFullyObscured)
1706 xw.state &= ~WIN_VISIBLE;
1707 else if(!(xw.state & WIN_VISIBLE))
1708 /* need a full redraw for next Expose, not just a buf copy */
1709 xw.state |= WIN_VISIBLE | WIN_REDRAW;
1710 }
1711
1712 void
1713 unmap(XEvent *ev) {
1714 xw.state &= ~WIN_VISIBLE;
1715 }
1716
1717 void
1718 xseturgency(int add) {
1719 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
1720 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
1721 XSetWMHints(xw.dpy, xw.win, h);
1722 XFree(h);
1723 }
1724
1725 void
1726 focus(XEvent *ev) {
1727 if(ev->type == FocusIn) {
1728 xw.state |= WIN_FOCUSED;
1729 xseturgency(0);
1730 } else
1731 xw.state &= ~WIN_FOCUSED;
1732 draw(SCREEN_UPDATE);
1733 }
1734
1735 char*
1736 kmap(KeySym k) {
1737 int i;
1738 for(i = 0; i < LEN(key); i++)
1739 if(key[i].k == k)
1740 return (char*)key[i].s;
1741 return NULL;
1742 }
1743
1744 void
1745 kpress(XEvent *ev) {
1746 XKeyEvent *e = &ev->xkey;
1747 KeySym ksym;
1748 char buf[32];
1749 char *customkey;
1750 int len;
1751 int meta;
1752 int shift;
1753 Status status;
1754
1755 meta = e->state & Mod1Mask;
1756 shift = e->state & ShiftMask;
1757 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
1758
1759 /* 1. custom keys from config.h */
1760 if((customkey = kmap(ksym)))
1761 ttywrite(customkey, strlen(customkey));
1762 /* 2. hardcoded (overrides X lookup) */
1763 else
1764 switch(ksym) {
1765 case XK_Up:
1766 case XK_Down:
1767 case XK_Left:
1768 case XK_Right:
1769 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', "DACB"[ksym - XK_Left]);
1770 ttywrite(buf, 3);
1771 break;
1772 case XK_Insert:
1773 if(shift)
1774 selpaste();
1775 break;
1776 case XK_Return:
1777 if(IS_SET(MODE_CRLF))
1778 ttywrite("\r\n", 2);
1779 else
1780 ttywrite("\r", 1);
1781 break;
1782 /* 3. X lookup */
1783 default:
1784 if(len > 0) {
1785 if(meta && len == 1)
1786 ttywrite("\033", 1);
1787 ttywrite(buf, len);
1788 } else /* 4. nothing to send */
1789 fprintf(stderr, "errkey: %d\n", (int)ksym);
1790 break;
1791 }
1792 }
1793
1794 void
1795 resize(XEvent *e) {
1796 int col, row;
1797
1798 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
1799 return;
1800
1801 xw.w = e->xconfigure.width;
1802 xw.h = e->xconfigure.height;
1803 col = (xw.w - 2*BORDER) / xw.cw;
1804 row = (xw.h - 2*BORDER) / xw.ch;
1805 if(col == term.col && row == term.row)
1806 return;
1807 if(tresize(col, row))
1808 draw(SCREEN_REDRAW);
1809 ttyresize(col, row);
1810 xresize(col, row);
1811 }
1812
1813 void
1814 run(void) {
1815 XEvent ev;
1816 fd_set rfd;
1817 int xfd = XConnectionNumber(xw.dpy);
1818
1819 for(;;) {
1820 FD_ZERO(&rfd);
1821 FD_SET(cmdfd, &rfd);
1822 FD_SET(xfd, &rfd);
1823 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) < 0) {
1824 if(errno == EINTR)
1825 continue;
1826 die("select failed: %s\n", SERRNO);
1827 }
1828 if(FD_ISSET(cmdfd, &rfd)) {
1829 ttyread();
1830 draw(SCREEN_UPDATE);
1831 }
1832 while(XPending(xw.dpy)) {
1833 XNextEvent(xw.dpy, &ev);
1834 if (XFilterEvent(&ev, xw.win))
1835 continue;
1836 if(handler[ev.type])
1837 (handler[ev.type])(&ev);
1838 }
1839 }
1840 }
1841
1842 int
1843 main(int argc, char *argv[]) {
1844 int i;
1845
1846 for(i = 1; i < argc; i++) {
1847 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
1848 case 't':
1849 if(++i < argc) opt_title = argv[i];
1850 break;
1851 case 'c':
1852 if(++i < argc) opt_class = argv[i];
1853 break;
1854 case 'e':
1855 if(++i < argc) opt_cmd = &argv[i];
1856 break;
1857 case 'v':
1858 default:
1859 die(USAGE);
1860 }
1861 /* -e eats every remaining arguments */
1862 if(opt_cmd)
1863 break;
1864 }
1865 setlocale(LC_CTYPE, "");
1866 tnew(80, 24);
1867 ttynew();
1868 xinit();
1869 selinit();
1870 run();
1871 return 0;
1872 }