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594b0d376539df0d0ab65c57a06e89543fbe8e3c
[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
42 #define SERRNO strerror(errno)
43 #define MIN(a, b) ((a) < (b) ? (a) : (b))
44 #define MAX(a, b) ((a) < (b) ? (b) : (a))
45 #define LEN(a) (sizeof(a) / sizeof(a[0]))
46 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
47 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
48 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
49 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
50 #define IS_SET(flag) (term.mode & (flag))
51
52 /* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
53 enum { ATTR_NULL=0 , ATTR_REVERSE=1 , ATTR_UNDERLINE=2, ATTR_BOLD=4, ATTR_GFX=8 };
54 enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT,
55 CURSOR_SAVE, CURSOR_LOAD };
56 enum { CURSOR_DEFAULT = 0, CURSOR_HIDE = 1, CURSOR_WRAPNEXT = 2 };
57 enum { GLYPH_SET=1, GLYPH_DIRTY=2 };
58 enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4, MODE_ALTSCREEN=8,
59 MODE_CRLF=16 };
60 enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
61 enum { SCREEN_UPDATE, SCREEN_REDRAW };
62 enum { WIN_VISIBLE=1, WIN_REDRAW=2, WIN_FOCUSED=4 };
63
64 typedef struct {
65 char c; /* character code */
66 char mode; /* attribute flags */
67 int fg; /* foreground */
68 int bg; /* background */
69 char state; /* state flags */
70 } Glyph;
71
72 typedef Glyph* Line;
73
74 typedef struct {
75 Glyph attr; /* current char attributes */
76 int x;
77 int y;
78 char state;
79 } TCursor;
80
81 /* CSI Escape sequence structs */
82 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
83 typedef struct {
84 char buf[ESC_BUF_SIZ]; /* raw string */
85 int len; /* raw string length */
86 char priv;
87 int arg[ESC_ARG_SIZ];
88 int narg; /* nb of args */
89 char mode;
90 } CSIEscape;
91
92 /* Internal representation of the screen */
93 typedef struct {
94 int row; /* nb row */
95 int col; /* nb col */
96 Line* line; /* screen */
97 Line* alt; /* alternate screen */
98 TCursor c; /* cursor */
99 int top; /* top scroll limit */
100 int bot; /* bottom scroll limit */
101 int mode; /* terminal mode flags */
102 int esc; /* escape state flags */
103 char title[ESC_TITLE_SIZ];
104 int titlelen;
105 } Term;
106
107 /* Purely graphic info */
108 typedef struct {
109 Display* dis;
110 Colormap cmap;
111 Window win;
112 Pixmap buf;
113 XIM xim;
114 XIC xic;
115 int scr;
116 int w; /* window width */
117 int h; /* window height */
118 int bufw; /* pixmap width */
119 int bufh; /* pixmap height */
120 int ch; /* char height */
121 int cw; /* char width */
122 char state; /* focus, redraw, visible */
123 } XWindow;
124
125 typedef struct {
126 KeySym k;
127 char s[ESC_BUF_SIZ];
128 } Key;
129
130 /* Drawing Context */
131 typedef struct {
132 unsigned long col[256];
133 XFontStruct* font;
134 XFontStruct* bfont;
135 GC gc;
136 } DC;
137
138 /* TODO: use better name for vars... */
139 typedef struct {
140 int mode;
141 int bx, by;
142 int ex, ey;
143 struct {int x, y;} b, e;
144 char *clip;
145 } Selection;
146
147 #include "config.h"
148
149 static void die(const char *errstr, ...);
150 static void draw(int);
151 static void execsh(void);
152 static void sigchld(int);
153 static void run(void);
154
155 static void csidump(void);
156 static void csihandle(void);
157 static void csiparse(void);
158 static void csireset(void);
159
160 static void tclearregion(int, int, int, int);
161 static void tcursor(int);
162 static void tdeletechar(int);
163 static void tdeleteline(int);
164 static void tinsertblank(int);
165 static void tinsertblankline(int);
166 static void tmoveto(int, int);
167 static void tnew(int, int);
168 static void tnewline(int);
169 static void tputtab(void);
170 static void tputc(char);
171 static void tputs(char*, int);
172 static void treset(void);
173 static void tresize(int, int);
174 static void tscrollup(int, int);
175 static void tscrolldown(int, int);
176 static void tsetattr(int*, int);
177 static void tsetchar(char);
178 static void tsetscroll(int, int);
179 static void tswapscreen(void);
180
181 static void ttynew(void);
182 static void ttyread(void);
183 static void ttyresize(int, int);
184 static void ttywrite(const char *, size_t);
185
186 static void xdraws(char *, Glyph, int, int, int);
187 static void xhints(void);
188 static void xclear(int, int, int, int);
189 static void xdrawcursor(void);
190 static void xinit(void);
191 static void xloadcols(void);
192 static void xseturgency(int);
193 static void xresize(int, int);
194
195 static void expose(XEvent *);
196 static void visibility(XEvent *);
197 static void unmap(XEvent *);
198 static char* kmap(KeySym);
199 static void kpress(XEvent *);
200 static void resize(XEvent *);
201 static void focus(XEvent *);
202 static void brelease(XEvent *);
203 static void bpress(XEvent *);
204 static void bmotion(XEvent *);
205 static void selection_notify(XEvent *);
206 static void selection_request(XEvent *);
207
208 static void (*handler[LASTEvent])(XEvent *) = {
209 [KeyPress] = kpress,
210 [ConfigureNotify] = resize,
211 [VisibilityNotify] = visibility,
212 [UnmapNotify] = unmap,
213 [Expose] = expose,
214 [FocusIn] = focus,
215 [FocusOut] = focus,
216 [MotionNotify] = bmotion,
217 [ButtonPress] = bpress,
218 [ButtonRelease] = brelease,
219 [SelectionNotify] = selection_notify,
220 [SelectionRequest] = selection_request,
221 };
222
223 /* Globals */
224 static DC dc;
225 static XWindow xw;
226 static Term term;
227 static CSIEscape escseq;
228 static int cmdfd;
229 static pid_t pid;
230 static Selection sel;
231 static char *opt_cmd = NULL;
232 static char *opt_title = NULL;
233
234 void
235 selinit(void) {
236 sel.mode = 0;
237 sel.bx = -1;
238 sel.clip = NULL;
239 }
240
241 static inline int selected(int x, int y) {
242 if(sel.ey == y && sel.by == y) {
243 int bx = MIN(sel.bx, sel.ex);
244 int ex = MAX(sel.bx, sel.ex);
245 return BETWEEN(x, bx, ex);
246 }
247 return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
248 || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
249 }
250
251 static void getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
252 if(b)
253 *b = e->xbutton.button;
254
255 *x = e->xbutton.x/xw.cw;
256 *y = e->xbutton.y/xw.ch;
257 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
258 sel.b.y = MIN(sel.by, sel.ey);
259 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
260 sel.e.y = MAX(sel.by, sel.ey);
261 }
262
263 static void bpress(XEvent *e) {
264 sel.mode = 1;
265 sel.ex = sel.bx = e->xbutton.x/xw.cw;
266 sel.ey = sel.by = e->xbutton.y/xw.ch;
267 }
268
269 static char *getseltext() {
270 char *str, *ptr;
271 int ls, x, y, sz;
272 if(sel.bx == -1)
273 return NULL;
274 sz = (term.col+1) * (sel.e.y-sel.b.y+1);
275 ptr = str = malloc(sz);
276 for(y = 0; y < term.row; y++) {
277 for(x = 0; x < term.col; x++)
278 if(term.line[y][x].state & GLYPH_SET && (ls = selected(x, y)))
279 *ptr = term.line[y][x].c, ptr++;
280 if(ls)
281 *ptr = '\n', ptr++;
282 }
283 *ptr = 0;
284 return str;
285 }
286
287 static void selection_notify(XEvent *e) {
288 unsigned long nitems;
289 unsigned long length;
290 int format, res;
291 unsigned char *data;
292 Atom type;
293
294 res = XGetWindowProperty(xw.dis, xw.win, XA_PRIMARY, 0, 0, False,
295 AnyPropertyType, &type, &format, &nitems, &length, &data);
296 switch(res) {
297 case BadAtom:
298 case BadValue:
299 case BadWindow:
300 fprintf(stderr, "Invalid paste, XGetWindowProperty0");
301 return;
302 }
303
304 res = XGetWindowProperty(xw.dis, xw.win, XA_PRIMARY, 0, length, False,
305 AnyPropertyType, &type, &format, &nitems, &length, &data);
306 switch(res) {
307 case BadAtom:
308 case BadValue:
309 case BadWindow:
310 fprintf(stderr, "Invalid paste, XGetWindowProperty0");
311 return;
312 }
313
314 if(data) {
315 ttywrite((const char *) data, nitems * format / 8);
316 XFree(data);
317 }
318 }
319
320 static void selpaste() {
321 XConvertSelection(xw.dis, XA_PRIMARY, XA_STRING, XA_PRIMARY, xw.win, CurrentTime);
322 }
323
324 static void selection_request(XEvent *e)
325 {
326 XSelectionRequestEvent *xsre;
327 XSelectionEvent xev;
328 int res;
329 Atom xa_targets;
330
331 xsre = (XSelectionRequestEvent *) e;
332 xev.type = SelectionNotify;
333 xev.requestor = xsre->requestor;
334 xev.selection = xsre->selection;
335 xev.target = xsre->target;
336 xev.time = xsre->time;
337 /* reject */
338 xev.property = None;
339
340 xa_targets = XInternAtom(xw.dis, "TARGETS", 0);
341 if(xsre->target == xa_targets) {
342 /* respond with the supported type */
343 Atom string = XA_STRING;
344 res = XChangeProperty(xsre->display, xsre->requestor, xsre->property, XA_ATOM, 32,
345 PropModeReplace, (unsigned char *) &string, 1);
346 switch(res) {
347 case BadAlloc:
348 case BadAtom:
349 case BadMatch:
350 case BadValue:
351 case BadWindow:
352 fprintf(stderr, "Error in selection_request, TARGETS");
353 break;
354 default:
355 xev.property = xsre->property;
356 }
357 } else if(xsre->target == XA_STRING) {
358 res = XChangeProperty(xsre->display, xsre->requestor, xsre->property,
359 xsre->target, 8, PropModeReplace, (unsigned char *) sel.clip,
360 strlen(sel.clip));
361 switch(res) {
362 case BadAlloc:
363 case BadAtom:
364 case BadMatch:
365 case BadValue:
366 case BadWindow:
367 fprintf(stderr, "Error in selection_request, XA_STRING");
368 break;
369 default:
370 xev.property = xsre->property;
371 }
372 }
373
374 /* all done, send a notification to the listener */
375 res = XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev);
376 switch(res) {
377 case 0:
378 case BadValue:
379 case BadWindow:
380 fprintf(stderr, "Error in selection_requested, XSendEvent");
381 }
382 }
383
384 static void selcopy(char *str) {
385 /* register the selection for both the clipboard and the primary */
386 Atom clipboard;
387 int res;
388
389 free(sel.clip);
390 sel.clip = str;
391
392 res = XSetSelectionOwner(xw.dis, XA_PRIMARY, xw.win, CurrentTime);
393 switch(res) {
394 case BadAtom:
395 case BadWindow:
396 fprintf(stderr, "Invalid copy, XSetSelectionOwner");
397 return;
398 }
399
400 clipboard = XInternAtom(xw.dis, "CLIPBOARD", 0);
401 res = XSetSelectionOwner(xw.dis, clipboard, xw.win, CurrentTime);
402 switch(res) {
403 case BadAtom:
404 case BadWindow:
405 fprintf(stderr, "Invalid copy, XSetSelectionOwner");
406 return;
407 }
408
409 XFlush(xw.dis);
410 }
411
412 /* TODO: doubleclick to select word */
413 static void brelease(XEvent *e) {
414 int b;
415 sel.mode = 0;
416 getbuttoninfo(e, &b, &sel.ex, &sel.ey);
417 if(sel.bx==sel.ex && sel.by==sel.ey) {
418 sel.bx = -1;
419 if(b==2)
420 selpaste();
421 } else {
422 if(b==1)
423 selcopy(getseltext());
424 }
425 draw(1);
426 }
427
428 static void bmotion(XEvent *e) {
429 if (sel.mode) {
430 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
431 draw(1);
432 }
433 }
434
435 #ifdef DEBUG
436 void
437 tdump(void) {
438 int row, col;
439 Glyph c;
440
441 for(row = 0; row < term.row; row++) {
442 for(col = 0; col < term.col; col++) {
443 if(col == term.c.x && row == term.c.y)
444 putchar('#');
445 else {
446 c = term.line[row][col];
447 putchar(c.state & GLYPH_SET ? c.c : '.');
448 }
449 }
450 putchar('\n');
451 }
452 }
453 #endif
454
455 void
456 die(const char *errstr, ...) {
457 va_list ap;
458
459 va_start(ap, errstr);
460 vfprintf(stderr, errstr, ap);
461 va_end(ap);
462 exit(EXIT_FAILURE);
463 }
464
465 void
466 execsh(void) {
467 char *args[] = {getenv("SHELL"), "-i", NULL};
468 if(opt_cmd)
469 args[0] = opt_cmd, args[1] = NULL;
470 else
471 DEFAULT(args[0], SHELL);
472 putenv("TERM="TNAME);
473 execvp(args[0], args);
474 }
475
476 void
477 sigchld(int a) {
478 int stat = 0;
479 if(waitpid(pid, &stat, 0) < 0)
480 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
481 if(WIFEXITED(stat))
482 exit(WEXITSTATUS(stat));
483 else
484 exit(EXIT_FAILURE);
485 }
486
487 void
488 ttynew(void) {
489 int m, s;
490
491 /* seems to work fine on linux, openbsd and freebsd */
492 struct winsize w = {term.row, term.col, 0, 0};
493 if(openpty(&m, &s, NULL, NULL, &w) < 0)
494 die("openpty failed: %s\n", SERRNO);
495
496 switch(pid = fork()) {
497 case -1:
498 die("fork failed\n");
499 break;
500 case 0:
501 setsid(); /* create a new process group */
502 dup2(s, STDIN_FILENO);
503 dup2(s, STDOUT_FILENO);
504 dup2(s, STDERR_FILENO);
505 if(ioctl(s, TIOCSCTTY, NULL) < 0)
506 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
507 close(s);
508 close(m);
509 execsh();
510 break;
511 default:
512 close(s);
513 cmdfd = m;
514 signal(SIGCHLD, sigchld);
515 }
516 }
517
518 void
519 dump(char c) {
520 static int col;
521 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
522 if(++col % 10 == 0)
523 fprintf(stderr, "\n");
524 }
525
526 void
527 ttyread(void) {
528 char buf[BUFSIZ];
529 int ret;
530
531 if((ret = read(cmdfd, buf, LEN(buf))) < 0)
532 die("Couldn't read from shell: %s\n", SERRNO);
533 else
534 tputs(buf, ret);
535 }
536
537 void
538 ttywrite(const char *s, size_t n) {
539 if(write(cmdfd, s, n) == -1)
540 die("write error on tty: %s\n", SERRNO);
541 }
542
543 void
544 ttyresize(int x, int y) {
545 struct winsize w;
546
547 w.ws_row = term.row;
548 w.ws_col = term.col;
549 w.ws_xpixel = w.ws_ypixel = 0;
550 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
551 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
552 }
553
554 void
555 tcursor(int mode) {
556 static TCursor c;
557
558 if(mode == CURSOR_SAVE)
559 c = term.c;
560 else if(mode == CURSOR_LOAD)
561 term.c = c, tmoveto(c.x, c.y);
562 }
563
564 void
565 treset(void) {
566 term.c = (TCursor){{
567 .mode = ATTR_NULL,
568 .fg = DefaultFG,
569 .bg = DefaultBG
570 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
571
572 term.top = 0, term.bot = term.row - 1;
573 term.mode = MODE_WRAP;
574 tclearregion(0, 0, term.col-1, term.row-1);
575 }
576
577 void
578 tnew(int col, int row) {
579 /* set screen size */
580 term.row = row, term.col = col;
581 term.line = malloc(term.row * sizeof(Line));
582 term.alt = malloc(term.row * sizeof(Line));
583 for(row = 0 ; row < term.row; row++) {
584 term.line[row] = malloc(term.col * sizeof(Glyph));
585 term.alt [row] = malloc(term.col * sizeof(Glyph));
586 }
587 /* setup screen */
588 treset();
589 }
590
591 void
592 tswapscreen(void) {
593 Line* tmp = term.line;
594 term.line = term.alt;
595 term.alt = tmp;
596 term.mode ^= MODE_ALTSCREEN;
597 }
598
599 void
600 tscrolldown(int orig, int n) {
601 int i;
602 Line temp;
603
604 LIMIT(n, 0, term.bot-orig+1);
605
606 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
607
608 for(i = term.bot; i >= orig+n; i--) {
609 temp = term.line[i];
610 term.line[i] = term.line[i-n];
611 term.line[i-n] = temp;
612 }
613 }
614
615 void
616 tscrollup(int orig, int n) {
617 int i;
618 Line temp;
619 LIMIT(n, 0, term.bot-orig+1);
620
621 tclearregion(0, orig, term.col-1, orig+n-1);
622
623 for(i = orig; i <= term.bot-n; i++) {
624 temp = term.line[i];
625 term.line[i] = term.line[i+n];
626 term.line[i+n] = temp;
627 }
628 }
629
630 void
631 tnewline(int first_col) {
632 int y = term.c.y;
633 if(y == term.bot)
634 tscrollup(term.top, 1);
635 else
636 y++;
637 tmoveto(first_col ? 0 : term.c.x, y);
638 }
639
640 void
641 csiparse(void) {
642 /* int noarg = 1; */
643 char *p = escseq.buf;
644
645 escseq.narg = 0;
646 if(*p == '?')
647 escseq.priv = 1, p++;
648
649 while(p < escseq.buf+escseq.len) {
650 while(isdigit(*p)) {
651 escseq.arg[escseq.narg] *= 10;
652 escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
653 }
654 if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
655 escseq.narg++, p++;
656 else {
657 escseq.mode = *p;
658 escseq.narg++;
659 return;
660 }
661 }
662 }
663
664 void
665 tmoveto(int x, int y) {
666 LIMIT(x, 0, term.col-1);
667 LIMIT(y, 0, term.row-1);
668 term.c.state &= ~CURSOR_WRAPNEXT;
669 term.c.x = x;
670 term.c.y = y;
671 }
672
673 void
674 tsetchar(char c) {
675 term.line[term.c.y][term.c.x] = term.c.attr;
676 term.line[term.c.y][term.c.x].c = c;
677 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
678 }
679
680 void
681 tclearregion(int x1, int y1, int x2, int y2) {
682 int x, y, temp;
683
684 if(x1 > x2)
685 temp = x1, x1 = x2, x2 = temp;
686 if(y1 > y2)
687 temp = y1, y1 = y2, y2 = temp;
688
689 LIMIT(x1, 0, term.col-1);
690 LIMIT(x2, 0, term.col-1);
691 LIMIT(y1, 0, term.row-1);
692 LIMIT(y2, 0, term.row-1);
693
694 for(y = y1; y <= y2; y++)
695 for(x = x1; x <= x2; x++)
696 term.line[y][x].state = 0;
697 }
698
699 void
700 tdeletechar(int n) {
701 int src = term.c.x + n;
702 int dst = term.c.x;
703 int size = term.col - src;
704
705 if(src >= term.col) {
706 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
707 return;
708 }
709 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
710 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
711 }
712
713 void
714 tinsertblank(int n) {
715 int src = term.c.x;
716 int dst = src + n;
717 int size = term.col - dst;
718
719 if(dst >= term.col) {
720 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
721 return;
722 }
723 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
724 tclearregion(src, term.c.y, dst - 1, term.c.y);
725 }
726
727 void
728 tinsertblankline(int n) {
729 if(term.c.y < term.top || term.c.y > term.bot)
730 return;
731
732 tscrolldown(term.c.y, n);
733 }
734
735 void
736 tdeleteline(int n) {
737 if(term.c.y < term.top || term.c.y > term.bot)
738 return;
739
740 tscrollup(term.c.y, n);
741 }
742
743 void
744 tsetattr(int *attr, int l) {
745 int i;
746
747 for(i = 0; i < l; i++) {
748 switch(attr[i]) {
749 case 0:
750 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
751 term.c.attr.fg = DefaultFG;
752 term.c.attr.bg = DefaultBG;
753 break;
754 case 1:
755 term.c.attr.mode |= ATTR_BOLD;
756 break;
757 case 4:
758 term.c.attr.mode |= ATTR_UNDERLINE;
759 break;
760 case 7:
761 term.c.attr.mode |= ATTR_REVERSE;
762 break;
763 case 22:
764 term.c.attr.mode &= ~ATTR_BOLD;
765 break;
766 case 24:
767 term.c.attr.mode &= ~ATTR_UNDERLINE;
768 break;
769 case 27:
770 term.c.attr.mode &= ~ATTR_REVERSE;
771 break;
772 case 38:
773 if (i + 2 < l && attr[i + 1] == 5) {
774 i += 2;
775 if (BETWEEN(attr[i], 0, 255))
776 term.c.attr.fg = attr[i];
777 else
778 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
779 }
780 else
781 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
782 break;
783 case 39:
784 term.c.attr.fg = DefaultFG;
785 break;
786 case 48:
787 if (i + 2 < l && attr[i + 1] == 5) {
788 i += 2;
789 if (BETWEEN(attr[i], 0, 255))
790 term.c.attr.bg = attr[i];
791 else
792 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
793 }
794 else
795 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
796 break;
797 case 49:
798 term.c.attr.bg = DefaultBG;
799 break;
800 default:
801 if(BETWEEN(attr[i], 30, 37))
802 term.c.attr.fg = attr[i] - 30;
803 else if(BETWEEN(attr[i], 40, 47))
804 term.c.attr.bg = attr[i] - 40;
805 else if(BETWEEN(attr[i], 90, 97))
806 term.c.attr.fg = attr[i] - 90 + 8;
807 else if(BETWEEN(attr[i], 100, 107))
808 term.c.attr.fg = attr[i] - 100 + 8;
809 else
810 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]), csidump();
811
812 break;
813 }
814 }
815 }
816
817 void
818 tsetscroll(int t, int b) {
819 int temp;
820
821 LIMIT(t, 0, term.row-1);
822 LIMIT(b, 0, term.row-1);
823 if(t > b) {
824 temp = t;
825 t = b;
826 b = temp;
827 }
828 term.top = t;
829 term.bot = b;
830 }
831
832 void
833 csihandle(void) {
834 switch(escseq.mode) {
835 default:
836 unknown:
837 printf("erresc: unknown csi ");
838 csidump();
839 /* die(""); */
840 break;
841 case '@': /* ICH -- Insert <n> blank char */
842 DEFAULT(escseq.arg[0], 1);
843 tinsertblank(escseq.arg[0]);
844 break;
845 case 'A': /* CUU -- Cursor <n> Up */
846 case 'e':
847 DEFAULT(escseq.arg[0], 1);
848 tmoveto(term.c.x, term.c.y-escseq.arg[0]);
849 break;
850 case 'B': /* CUD -- Cursor <n> Down */
851 DEFAULT(escseq.arg[0], 1);
852 tmoveto(term.c.x, term.c.y+escseq.arg[0]);
853 break;
854 case 'C': /* CUF -- Cursor <n> Forward */
855 case 'a':
856 DEFAULT(escseq.arg[0], 1);
857 tmoveto(term.c.x+escseq.arg[0], term.c.y);
858 break;
859 case 'D': /* CUB -- Cursor <n> Backward */
860 DEFAULT(escseq.arg[0], 1);
861 tmoveto(term.c.x-escseq.arg[0], term.c.y);
862 break;
863 case 'E': /* CNL -- Cursor <n> Down and first col */
864 DEFAULT(escseq.arg[0], 1);
865 tmoveto(0, term.c.y+escseq.arg[0]);
866 break;
867 case 'F': /* CPL -- Cursor <n> Up and first col */
868 DEFAULT(escseq.arg[0], 1);
869 tmoveto(0, term.c.y-escseq.arg[0]);
870 break;
871 case 'G': /* CHA -- Move to <col> */
872 case '`': /* XXX: HPA -- same? */
873 DEFAULT(escseq.arg[0], 1);
874 tmoveto(escseq.arg[0]-1, term.c.y);
875 break;
876 case 'H': /* CUP -- Move to <row> <col> */
877 case 'f': /* XXX: HVP -- same? */
878 DEFAULT(escseq.arg[0], 1);
879 DEFAULT(escseq.arg[1], 1);
880 tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
881 break;
882 /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
883 case 'J': /* ED -- Clear screen */
884 switch(escseq.arg[0]) {
885 case 0: /* below */
886 tclearregion(term.c.x, term.c.y, term.col-1, term.row-1);
887 break;
888 case 1: /* above */
889 tclearregion(0, 0, term.c.x, term.c.y);
890 break;
891 case 2: /* all */
892 tclearregion(0, 0, term.col-1, term.row-1);
893 break;
894 default:
895 goto unknown;
896 }
897 break;
898 case 'K': /* EL -- Clear line */
899 switch(escseq.arg[0]) {
900 case 0: /* right */
901 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
902 break;
903 case 1: /* left */
904 tclearregion(0, term.c.y, term.c.x, term.c.y);
905 break;
906 case 2: /* all */
907 tclearregion(0, term.c.y, term.col-1, term.c.y);
908 break;
909 }
910 break;
911 case 'S': /* SU -- Scroll <n> line up */
912 DEFAULT(escseq.arg[0], 1);
913 tscrollup(term.top, escseq.arg[0]);
914 break;
915 case 'T': /* SD -- Scroll <n> line down */
916 DEFAULT(escseq.arg[0], 1);
917 tscrolldown(term.top, escseq.arg[0]);
918 break;
919 case 'L': /* IL -- Insert <n> blank lines */
920 DEFAULT(escseq.arg[0], 1);
921 tinsertblankline(escseq.arg[0]);
922 break;
923 case 'l': /* RM -- Reset Mode */
924 if(escseq.priv) {
925 switch(escseq.arg[0]) {
926 case 1:
927 term.mode &= ~MODE_APPKEYPAD;
928 break;
929 case 5: /* TODO: DECSCNM -- Remove reverse video */
930 break;
931 case 7:
932 term.mode &= ~MODE_WRAP;
933 break;
934 case 12: /* att610 -- Stop blinking cursor (IGNORED) */
935 break;
936 case 20:
937 term.mode &= ~MODE_CRLF;
938 break;
939 case 25:
940 term.c.state |= CURSOR_HIDE;
941 break;
942 case 1049: /* = 1047 and 1048 */
943 case 1047:
944 if(IS_SET(MODE_ALTSCREEN)) {
945 tclearregion(0, 0, term.col-1, term.row-1);
946 tswapscreen();
947 }
948 if(escseq.arg[0] == 1047)
949 break;
950 case 1048:
951 tcursor(CURSOR_LOAD);
952 break;
953 default:
954 goto unknown;
955 }
956 } else {
957 switch(escseq.arg[0]) {
958 case 4:
959 term.mode &= ~MODE_INSERT;
960 break;
961 default:
962 goto unknown;
963 }
964 }
965 break;
966 case 'M': /* DL -- Delete <n> lines */
967 DEFAULT(escseq.arg[0], 1);
968 tdeleteline(escseq.arg[0]);
969 break;
970 case 'X': /* ECH -- Erase <n> char */
971 DEFAULT(escseq.arg[0], 1);
972 tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
973 break;
974 case 'P': /* DCH -- Delete <n> char */
975 DEFAULT(escseq.arg[0], 1);
976 tdeletechar(escseq.arg[0]);
977 break;
978 /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
979 case 'd': /* VPA -- Move to <row> */
980 DEFAULT(escseq.arg[0], 1);
981 tmoveto(term.c.x, escseq.arg[0]-1);
982 break;
983 case 'h': /* SM -- Set terminal mode */
984 if(escseq.priv) {
985 switch(escseq.arg[0]) {
986 case 1:
987 term.mode |= MODE_APPKEYPAD;
988 break;
989 case 5: /* DECSCNM -- Reverve video */
990 /* TODO: set REVERSE on the whole screen (f) */
991 break;
992 case 7:
993 term.mode |= MODE_WRAP;
994 break;
995 case 20:
996 term.mode |= MODE_CRLF;
997 break;
998 case 12: /* att610 -- Start blinking cursor (IGNORED) */
999 /* fallthrough for xterm cvvis = CSI [ ? 12 ; 25 h */
1000 if(escseq.narg > 1 && escseq.arg[1] != 25)
1001 break;
1002 case 25:
1003 term.c.state &= ~CURSOR_HIDE;
1004 break;
1005 case 1049: /* = 1047 and 1048 */
1006 case 1047:
1007 if(IS_SET(MODE_ALTSCREEN))
1008 tclearregion(0, 0, term.col-1, term.row-1);
1009 else
1010 tswapscreen();
1011 if(escseq.arg[0] == 1047)
1012 break;
1013 case 1048:
1014 tcursor(CURSOR_SAVE);
1015 break;
1016 default: goto unknown;
1017 }
1018 } else {
1019 switch(escseq.arg[0]) {
1020 case 4:
1021 term.mode |= MODE_INSERT;
1022 break;
1023 default: goto unknown;
1024 }
1025 };
1026 break;
1027 case 'm': /* SGR -- Terminal attribute (color) */
1028 tsetattr(escseq.arg, escseq.narg);
1029 break;
1030 case 'r': /* DECSTBM -- Set Scrolling Region */
1031 if(escseq.priv)
1032 goto unknown;
1033 else {
1034 DEFAULT(escseq.arg[0], 1);
1035 DEFAULT(escseq.arg[1], term.row);
1036 tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
1037 tmoveto(0, 0);
1038 }
1039 break;
1040 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1041 tcursor(CURSOR_SAVE);
1042 break;
1043 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1044 tcursor(CURSOR_LOAD);
1045 break;
1046 }
1047 }
1048
1049 void
1050 csidump(void) {
1051 int i;
1052 printf("ESC [ %s", escseq.priv ? "? " : "");
1053 if(escseq.narg)
1054 for(i = 0; i < escseq.narg; i++)
1055 printf("%d ", escseq.arg[i]);
1056 if(escseq.mode)
1057 putchar(escseq.mode);
1058 putchar('\n');
1059 }
1060
1061 void
1062 csireset(void) {
1063 memset(&escseq, 0, sizeof(escseq));
1064 }
1065
1066 void
1067 tputtab(void) {
1068 int space = TAB - term.c.x % TAB;
1069 tmoveto(term.c.x + space, term.c.y);
1070 }
1071
1072 void
1073 tputc(char c) {
1074 if(term.esc & ESC_START) {
1075 if(term.esc & ESC_CSI) {
1076 escseq.buf[escseq.len++] = c;
1077 if(BETWEEN(c, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
1078 term.esc = 0;
1079 csiparse(), csihandle();
1080 }
1081 /* TODO: handle other OSC */
1082 } else if(term.esc & ESC_OSC) {
1083 if(c == ';') {
1084 term.titlelen = 0;
1085 term.esc = ESC_START | ESC_TITLE;
1086 }
1087 } else if(term.esc & ESC_TITLE) {
1088 if(c == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
1089 term.esc = 0;
1090 term.title[term.titlelen] = '\0';
1091 XStoreName(xw.dis, xw.win, term.title);
1092 } else {
1093 term.title[term.titlelen++] = c;
1094 }
1095 } else if(term.esc & ESC_ALTCHARSET) {
1096 switch(c) {
1097 case '0': /* Line drawing crap */
1098 term.c.attr.mode |= ATTR_GFX;
1099 break;
1100 case 'B': /* Back to regular text */
1101 term.c.attr.mode &= ~ATTR_GFX;
1102 break;
1103 default:
1104 printf("esc unhandled charset: ESC ( %c\n", c);
1105 }
1106 term.esc = 0;
1107 } else {
1108 switch(c) {
1109 case '[':
1110 term.esc |= ESC_CSI;
1111 break;
1112 case ']':
1113 term.esc |= ESC_OSC;
1114 break;
1115 case '(':
1116 term.esc |= ESC_ALTCHARSET;
1117 break;
1118 case 'D': /* IND -- Linefeed */
1119 if(term.c.y == term.bot)
1120 tscrollup(term.top, 1);
1121 else
1122 tmoveto(term.c.x, term.c.y+1);
1123 term.esc = 0;
1124 break;
1125 case 'E': /* NEL -- Next line */
1126 tnewline(1); /* always go to first col */
1127 term.esc = 0;
1128 break;
1129 case 'M': /* RI -- Reverse index */
1130 if(term.c.y == term.top)
1131 tscrolldown(term.top, 1);
1132 else
1133 tmoveto(term.c.x, term.c.y-1);
1134 term.esc = 0;
1135 break;
1136 case 'c': /* RIS -- Reset to inital state */
1137 treset();
1138 term.esc = 0;
1139 break;
1140 case '=': /* DECPAM -- Application keypad */
1141 term.mode |= MODE_APPKEYPAD;
1142 term.esc = 0;
1143 break;
1144 case '>': /* DECPNM -- Normal keypad */
1145 term.mode &= ~MODE_APPKEYPAD;
1146 term.esc = 0;
1147 break;
1148 case '7': /* DECSC -- Save Cursor */
1149 tcursor(CURSOR_SAVE);
1150 term.esc = 0;
1151 break;
1152 case '8': /* DECRC -- Restore Cursor */
1153 tcursor(CURSOR_LOAD);
1154 term.esc = 0;
1155 break;
1156 default:
1157 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n", c, isprint(c)?c:'.');
1158 term.esc = 0;
1159 }
1160 }
1161 } else {
1162 switch(c) {
1163 case '\t':
1164 tputtab();
1165 break;
1166 case '\b':
1167 tmoveto(term.c.x-1, term.c.y);
1168 break;
1169 case '\r':
1170 tmoveto(0, term.c.y);
1171 break;
1172 case '\f':
1173 case '\v':
1174 case '\n':
1175 /* go to first col if the mode is set */
1176 tnewline(IS_SET(MODE_CRLF));
1177 break;
1178 case '\a':
1179 if(!(xw.state & WIN_FOCUSED))
1180 xseturgency(1);
1181 break;
1182 case '\033':
1183 csireset();
1184 term.esc = ESC_START;
1185 break;
1186 default:
1187 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1188 tnewline(1); /* always go to first col */
1189 tsetchar(c);
1190 if(term.c.x+1 < term.col)
1191 tmoveto(term.c.x+1, term.c.y);
1192 else
1193 term.c.state |= CURSOR_WRAPNEXT;
1194 break;
1195 }
1196 }
1197 }
1198
1199 void
1200 tputs(char *s, int len) {
1201 for(; len > 0; len--)
1202 tputc(*s++);
1203 }
1204
1205 void
1206 tresize(int col, int row) {
1207 int i, x;
1208 int minrow = MIN(row, term.row);
1209 int mincol = MIN(col, term.col);
1210 int slide = term.c.y - row + 1;
1211
1212 if(col < 1 || row < 1)
1213 return;
1214
1215 /* free unneeded rows */
1216 i = 0;
1217 if(slide > 0) {
1218 /* slide screen to keep cursor where we expect it -
1219 * tscrollup would work here, but we can optimize to
1220 * memmove because we're freeing the earlier lines */
1221 for(/* i = 0 */; i < slide; i++) {
1222 free(term.line[i]);
1223 free(term.alt[i]);
1224 }
1225 memmove(term.line, term.line + slide, row * sizeof(Line));
1226 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1227 }
1228 for(i += row; i < term.row; i++) {
1229 free(term.line[i]);
1230 free(term.alt[i]);
1231 }
1232
1233 /* resize to new height */
1234 term.line = realloc(term.line, row * sizeof(Line));
1235 term.alt = realloc(term.alt, row * sizeof(Line));
1236
1237 /* resize each row to new width, zero-pad if needed */
1238 for(i = 0; i < minrow; i++) {
1239 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
1240 term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
1241 for(x = mincol; x < col; x++) {
1242 term.line[i][x].state = 0;
1243 term.alt[i][x].state = 0;
1244 }
1245 }
1246
1247 /* allocate any new rows */
1248 for(/* i == minrow */; i < row; i++) {
1249 term.line[i] = calloc(col, sizeof(Glyph));
1250 term.alt [i] = calloc(col, sizeof(Glyph));
1251 }
1252
1253 /* update terminal size */
1254 term.col = col, term.row = row;
1255 /* make use of the LIMIT in tmoveto */
1256 tmoveto(term.c.x, term.c.y);
1257 /* reset scrolling region */
1258 tsetscroll(0, row-1);
1259 }
1260
1261 void
1262 xresize(int col, int row) {
1263 xw.bufw = MAX(1, col * xw.cw);
1264 xw.bufh = MAX(1, row * xw.ch);
1265 XFreePixmap(xw.dis, xw.buf);
1266 xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1267 }
1268
1269 void
1270 xloadcols(void) {
1271 int i, r, g, b;
1272 XColor color;
1273 unsigned long white = WhitePixel(xw.dis, xw.scr);
1274
1275 for(i = 0; i < 16; i++) {
1276 if (!XAllocNamedColor(xw.dis, xw.cmap, colorname[i], &color, &color)) {
1277 dc.col[i] = white;
1278 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1279 } else
1280 dc.col[i] = color.pixel;
1281 }
1282
1283 /* same colors as xterm */
1284 for(r = 0; r < 6; r++)
1285 for(g = 0; g < 6; g++)
1286 for(b = 0; b < 6; b++) {
1287 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1288 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1289 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1290 if (!XAllocColor(xw.dis, xw.cmap, &color)) {
1291 dc.col[i] = white;
1292 fprintf(stderr, "Could not allocate color %d\n", i);
1293 } else
1294 dc.col[i] = color.pixel;
1295 i++;
1296 }
1297
1298 for(r = 0; r < 24; r++, i++) {
1299 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1300 if (!XAllocColor(xw.dis, xw.cmap, &color)) {
1301 dc.col[i] = white;
1302 fprintf(stderr, "Could not allocate color %d\n", i);
1303 } else
1304 dc.col[i] = color.pixel;
1305 }
1306 }
1307
1308 void
1309 xclear(int x1, int y1, int x2, int y2) {
1310 XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1311 XFillRectangle(xw.dis, xw.buf, dc.gc,
1312 x1 * xw.cw, y1 * xw.ch,
1313 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1314 }
1315
1316 void
1317 xhints(void)
1318 {
1319 XClassHint class = {TNAME, TNAME};
1320 XWMHints wm = {.flags = InputHint, .input = 1};
1321 XSizeHints size = {
1322 .flags = PSize | PResizeInc | PBaseSize,
1323 .height = xw.h,
1324 .width = xw.w,
1325 .height_inc = xw.ch,
1326 .width_inc = xw.cw,
1327 .base_height = 2*BORDER,
1328 .base_width = 2*BORDER,
1329 };
1330 XSetWMProperties(xw.dis, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1331 }
1332
1333 void
1334 xinit(void) {
1335 XSetWindowAttributes attrs;
1336
1337 if(!(xw.dis = XOpenDisplay(NULL)))
1338 die("Can't open display\n");
1339 xw.scr = XDefaultScreen(xw.dis);
1340
1341 /* font */
1342 if(!(dc.font = XLoadQueryFont(xw.dis, FONT)) || !(dc.bfont = XLoadQueryFont(xw.dis, BOLDFONT)))
1343 die("Can't load font %s\n", dc.font ? BOLDFONT : FONT);
1344
1345 /* XXX: Assuming same size for bold font */
1346 xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing;
1347 xw.ch = dc.font->ascent + dc.font->descent;
1348
1349 /* colors */
1350 xw.cmap = XDefaultColormap(xw.dis, xw.scr);
1351 xloadcols();
1352
1353 /* window - default size */
1354 xw.bufh = 24 * xw.ch;
1355 xw.bufw = 80 * xw.cw;
1356 xw.h = xw.bufh + 2*BORDER;
1357 xw.w = xw.bufw + 2*BORDER;
1358
1359 attrs.background_pixel = dc.col[DefaultBG];
1360 attrs.border_pixel = dc.col[DefaultBG];
1361 attrs.bit_gravity = NorthWestGravity;
1362 attrs.event_mask = FocusChangeMask | KeyPressMask
1363 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1364 | PointerMotionMask | ButtonPressMask | ButtonReleaseMask;
1365 attrs.colormap = xw.cmap;
1366
1367 xw.win = XCreateWindow(xw.dis, XRootWindow(xw.dis, xw.scr), 0, 0,
1368 xw.w, xw.h, 0, XDefaultDepth(xw.dis, xw.scr), InputOutput,
1369 XDefaultVisual(xw.dis, xw.scr),
1370 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
1371 | CWColormap,
1372 &attrs);
1373 xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1374
1375
1376 /* input methods */
1377 xw.xim = XOpenIM(xw.dis, NULL, NULL, NULL);
1378 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
1379 | XIMStatusNothing, XNClientWindow, xw.win,
1380 XNFocusWindow, xw.win, NULL);
1381 /* gc */
1382 dc.gc = XCreateGC(xw.dis, xw.win, 0, NULL);
1383
1384 XMapWindow(xw.dis, xw.win);
1385 xhints();
1386 XStoreName(xw.dis, xw.win, opt_title ? opt_title : "st");
1387 XSync(xw.dis, 0);
1388 }
1389
1390 void
1391 xdraws(char *s, Glyph base, int x, int y, int len) {
1392 unsigned long xfg, xbg;
1393 int winx = x*xw.cw, winy = y*xw.ch + dc.font->ascent, width = len*xw.cw;
1394 int i;
1395
1396 if(base.mode & ATTR_REVERSE)
1397 xfg = dc.col[base.bg], xbg = dc.col[base.fg];
1398 else
1399 xfg = dc.col[base.fg], xbg = dc.col[base.bg];
1400
1401 XSetBackground(xw.dis, dc.gc, xbg);
1402 XSetForeground(xw.dis, dc.gc, xfg);
1403
1404 if(base.mode & ATTR_GFX)
1405 for(i = 0; i < len; i++) {
1406 char c = gfx[(unsigned int)s[i] % 256];
1407 if(c)
1408 s[i] = c;
1409 else if(s[i] > 0x5f)
1410 s[i] -= 0x5f;
1411 }
1412
1413 XSetFont(xw.dis, dc.gc, base.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1414 XDrawImageString(xw.dis, xw.buf, dc.gc, winx, winy, s, len);
1415
1416 if(base.mode & ATTR_UNDERLINE)
1417 XDrawLine(xw.dis, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1418 }
1419
1420 void
1421 xdrawcursor(void) {
1422 static int oldx = 0;
1423 static int oldy = 0;
1424 Glyph g = {' ', ATTR_NULL, DefaultBG, DefaultCS, 0};
1425
1426 LIMIT(oldx, 0, term.col-1);
1427 LIMIT(oldy, 0, term.row-1);
1428
1429 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
1430 g.c = term.line[term.c.y][term.c.x].c;
1431
1432 /* remove the old cursor */
1433 if(term.line[oldy][oldx].state & GLYPH_SET)
1434 xdraws(&term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1);
1435 else
1436 xclear(oldx, oldy, oldx, oldy);
1437
1438 /* draw the new one */
1439 if(!(term.c.state & CURSOR_HIDE) && (xw.state & WIN_FOCUSED)) {
1440 xdraws(&g.c, g, term.c.x, term.c.y, 1);
1441 oldx = term.c.x, oldy = term.c.y;
1442 }
1443 }
1444
1445 #ifdef DEBUG
1446 /* basic drawing routines */
1447 void
1448 xdrawc(int x, int y, Glyph g) {
1449 XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
1450 XSetBackground(xw.dis, dc.gc, dc.col[g.bg]);
1451 XSetForeground(xw.dis, dc.gc, dc.col[g.fg]);
1452 XSetFont(xw.dis, dc.gc, g.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1453 XDrawImageString(xw.dis, xw.buf, dc.gc, r.x, r.y+dc.font->ascent, &g.c, 1);
1454 }
1455
1456 void
1457 draw(int dummy) {
1458 int x, y;
1459
1460 xclear(0, 0, term.col-1, term.row-1);
1461 for(y = 0; y < term.row; y++)
1462 for(x = 0; x < term.col; x++)
1463 if(term.line[y][x].state & GLYPH_SET)
1464 xdrawc(x, y, term.line[y][x]);
1465
1466 xdrawcursor();
1467 XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1468 XFlush(xw.dis);
1469 }
1470
1471 #else
1472 /* optimized drawing routine */
1473 void
1474 draw(int redraw_all) {
1475 int i, x, y, ox;
1476 Glyph base, new;
1477 char buf[DRAW_BUF_SIZ];
1478
1479 if(!(xw.state & WIN_VISIBLE))
1480 return;
1481
1482 xclear(0, 0, term.col-1, term.row-1);
1483 for(y = 0; y < term.row; y++) {
1484 base = term.line[y][0];
1485 i = ox = 0;
1486 for(x = 0; x < term.col; x++) {
1487 new = term.line[y][x];
1488 if(sel.bx!=-1 && new.c && selected(x, y))
1489 new.mode ^= ATTR_REVERSE;
1490 if(i > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
1491 i >= DRAW_BUF_SIZ)) {
1492 xdraws(buf, base, ox, y, i);
1493 i = 0;
1494 }
1495 if(new.state & GLYPH_SET) {
1496 if(i == 0) {
1497 ox = x;
1498 base = new;
1499 }
1500 buf[i++] = new.c;
1501 }
1502 }
1503 if(i > 0)
1504 xdraws(buf, base, ox, y, i);
1505 }
1506 xdrawcursor();
1507 XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1508 }
1509
1510 #endif
1511
1512 void
1513 expose(XEvent *ev) {
1514 XExposeEvent *e = &ev->xexpose;
1515 if(xw.state & WIN_REDRAW) {
1516 if(!e->count) {
1517 xw.state &= ~WIN_REDRAW;
1518 draw(SCREEN_REDRAW);
1519 }
1520 } else
1521 XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, e->x-BORDER, e->y-BORDER,
1522 e->width, e->height, e->x, e->y);
1523 }
1524
1525 void
1526 visibility(XEvent *ev) {
1527 XVisibilityEvent *e = &ev->xvisibility;
1528 if(e->state == VisibilityFullyObscured)
1529 xw.state &= ~WIN_VISIBLE;
1530 else if(!(xw.state & WIN_VISIBLE))
1531 /* need a full redraw for next Expose, not just a buf copy */
1532 xw.state |= WIN_VISIBLE | WIN_REDRAW;
1533 }
1534
1535 void
1536 unmap(XEvent *ev) {
1537 xw.state &= ~WIN_VISIBLE;
1538 }
1539
1540 void
1541 xseturgency(int add) {
1542 XWMHints *h = XGetWMHints(xw.dis, xw.win);
1543 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
1544 XSetWMHints(xw.dis, xw.win, h);
1545 XFree(h);
1546 }
1547
1548 void
1549 focus(XEvent *ev) {
1550 if(ev->type == FocusIn) {
1551 xw.state |= WIN_FOCUSED;
1552 xseturgency(0);
1553 } else
1554 xw.state &= ~WIN_FOCUSED;
1555 draw(SCREEN_UPDATE);
1556 }
1557
1558 char*
1559 kmap(KeySym k) {
1560 int i;
1561 for(i = 0; i < LEN(key); i++)
1562 if(key[i].k == k)
1563 return (char*)key[i].s;
1564 return NULL;
1565 }
1566
1567 void
1568 kpress(XEvent *ev) {
1569 XKeyEvent *e = &ev->xkey;
1570 KeySym ksym;
1571 char buf[32];
1572 char *customkey;
1573 int len;
1574 int meta;
1575 int shift;
1576 Status status;
1577
1578 meta = e->state & Mod1Mask;
1579 shift = e->state & ShiftMask;
1580 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
1581
1582 /* 1. custom keys from config.h */
1583 if((customkey = kmap(ksym)))
1584 ttywrite(customkey, strlen(customkey));
1585 /* 2. hardcoded (overrides X lookup) */
1586 else
1587 switch(ksym) {
1588 case XK_Up:
1589 case XK_Down:
1590 case XK_Left:
1591 case XK_Right:
1592 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', "DACB"[ksym - XK_Left]);
1593 ttywrite(buf, 3);
1594 break;
1595 case XK_Insert:
1596 if(shift)
1597 selpaste();
1598 break;
1599 case XK_Return:
1600 if(IS_SET(MODE_CRLF))
1601 ttywrite("\r\n", 2);
1602 else
1603 ttywrite("\r", 1);
1604 break;
1605 /* 3. X lookup */
1606 default:
1607 if(len > 0) {
1608 buf[sizeof(buf)-1] = '\0';
1609 if(meta && len == 1)
1610 ttywrite("\033", 1);
1611 ttywrite(buf, len);
1612 } else /* 4. nothing to send */
1613 fprintf(stderr, "errkey: %d\n", (int)ksym);
1614 break;
1615 }
1616 }
1617
1618 void
1619 resize(XEvent *e) {
1620 int col, row;
1621
1622 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
1623 return;
1624
1625 xw.w = e->xconfigure.width;
1626 xw.h = e->xconfigure.height;
1627 col = (xw.w - 2*BORDER) / xw.cw;
1628 row = (xw.h - 2*BORDER) / xw.ch;
1629 if(col == term.col && row == term.row)
1630 return;
1631 tresize(col, row);
1632 ttyresize(col, row);
1633 xresize(col, row);
1634 }
1635
1636 void
1637 run(void) {
1638 XEvent ev;
1639 fd_set rfd;
1640 int xfd = XConnectionNumber(xw.dis);
1641
1642 for(;;) {
1643 FD_ZERO(&rfd);
1644 FD_SET(cmdfd, &rfd);
1645 FD_SET(xfd, &rfd);
1646 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) < 0) {
1647 if(errno == EINTR)
1648 continue;
1649 die("select failed: %s\n", SERRNO);
1650 }
1651 if(FD_ISSET(cmdfd, &rfd)) {
1652 ttyread();
1653 draw(SCREEN_UPDATE);
1654 }
1655 while(XPending(xw.dis)) {
1656 XNextEvent(xw.dis, &ev);
1657 if (XFilterEvent(&ev, xw.win))
1658 continue;
1659 if(handler[ev.type])
1660 (handler[ev.type])(&ev);
1661 }
1662 }
1663 }
1664
1665 int
1666 main(int argc, char *argv[]) {
1667 int i;
1668
1669 for(i = 1; i < argc; i++) {
1670 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
1671 case 't':
1672 if(++i < argc) opt_title = argv[i];
1673 break;
1674 case 'e':
1675 if(++i < argc) opt_cmd = argv[i];
1676 break;
1677 case 'v':
1678 default:
1679 die(USAGE);
1680 }
1681 }
1682 setlocale(LC_CTYPE, "");
1683 tnew(80, 24);
1684 ttynew();
1685 xinit();
1686 selinit();
1687 run();
1688 return 0;
1689 }