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