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