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4f17752144b9f6e14a9290ef9279f6aae2b8e7d0
[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 enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
60 enum { SCREEN_UPDATE, SCREEN_REDRAW };
61 enum { WIN_VISIBLE=1, WIN_REDRAW=2, WIN_FOCUSED=4 };
62
63 typedef struct {
64 char c; /* character code */
65 char mode; /* attribute flags */
66 int fg; /* foreground */
67 int bg; /* background */
68 char state; /* state flags */
69 } Glyph;
70
71 typedef Glyph* Line;
72
73 typedef struct {
74 Glyph attr; /* current char attributes */
75 int x;
76 int y;
77 char state;
78 } TCursor;
79
80 /* CSI Escape sequence structs */
81 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
82 typedef struct {
83 char buf[ESC_BUF_SIZ]; /* raw string */
84 int len; /* raw string length */
85 char priv;
86 int arg[ESC_ARG_SIZ];
87 int narg; /* nb of args */
88 char mode;
89 } CSIEscape;
90
91 /* Internal representation of the screen */
92 typedef struct {
93 int row; /* nb row */
94 int col; /* nb col */
95 Line* line; /* screen */
96 Line* alt; /* alternate screen */
97 TCursor c; /* cursor */
98 int top; /* top scroll limit */
99 int bot; /* bottom scroll limit */
100 int mode; /* terminal mode flags */
101 int esc; /* escape state flags */
102 char title[ESC_TITLE_SIZ];
103 int titlelen;
104 } Term;
105
106 /* Purely graphic info */
107 typedef struct {
108 Display* dis;
109 Colormap cmap;
110 Window win;
111 Pixmap buf;
112 XIM xim;
113 XIC xic;
114 int scr;
115 int w; /* window width */
116 int h; /* window height */
117 int bufw; /* pixmap width */
118 int bufh; /* pixmap height */
119 int ch; /* char height */
120 int cw; /* char width */
121 char state; /* focus, redraw, visible */
122 } XWindow;
123
124 typedef struct {
125 KeySym k;
126 char s[ESC_BUF_SIZ];
127 } Key;
128
129 /* Drawing Context */
130 typedef struct {
131 unsigned long col[256];
132 XFontStruct* font;
133 XFontStruct* bfont;
134 GC gc;
135 } DC;
136
137 /* TODO: use better name for vars... */
138 typedef struct {
139 int mode;
140 int bx, by;
141 int ex, ey;
142 struct {int x, y;} b, e;
143 char *clip;
144 } Selection;
145
146 #include "config.h"
147
148 static void die(const char *errstr, ...);
149 static void draw(int);
150 static void execsh(void);
151 static void sigchld(int);
152 static void run(void);
153
154 static void csidump(void);
155 static void csihandle(void);
156 static void csiparse(void);
157 static void csireset(void);
158
159 static void tclearregion(int, int, int, int);
160 static void tcursor(int);
161 static void tdeletechar(int);
162 static void tdeleteline(int);
163 static void tinsertblank(int);
164 static void tinsertblankline(int);
165 static void tmoveto(int, int);
166 static void tnew(int, int);
167 static void tnewline(void);
168 static void tputtab(void);
169 static void tputc(char);
170 static void tputs(char*, int);
171 static void treset(void);
172 static void tresize(int, int);
173 static void tscrollup(int, int);
174 static void tscrolldown(int, int);
175 static void tsetattr(int*, int);
176 static void tsetchar(char);
177 static void tsetscroll(int, int);
178 static void tswapscreen(void);
179
180 static void ttynew(void);
181 static void ttyread(void);
182 static void ttyresize(int, int);
183 static void ttywrite(const char *, size_t);
184
185 static void xdraws(char *, Glyph, int, int, int);
186 static void xhints(void);
187 static void xclear(int, int, int, int);
188 static void xdrawcursor(void);
189 static void xinit(void);
190 static void xloadcols(void);
191 static void xseturgency(int);
192
193 static void expose(XEvent *);
194 static void visibility(XEvent *);
195 static void unmap(XEvent *);
196 static char* kmap(KeySym);
197 static void kpress(XEvent *);
198 static void resize(XEvent *);
199 static void focus(XEvent *);
200 static void brelease(XEvent *);
201 static void bpress(XEvent *);
202 static void bmotion(XEvent *);
203 static void selection_notify(XEvent *);
204 static void selection_request(XEvent *);
205
206 static void (*handler[LASTEvent])(XEvent *) = {
207 [KeyPress] = kpress,
208 [ConfigureNotify] = resize,
209 [VisibilityNotify] = visibility,
210 [UnmapNotify] = unmap,
211 [Expose] = expose,
212 [FocusIn] = focus,
213 [FocusOut] = focus,
214 [MotionNotify] = bmotion,
215 [ButtonPress] = bpress,
216 [ButtonRelease] = brelease,
217 [SelectionNotify] = selection_notify,
218 [SelectionRequest] = selection_request,
219 };
220
221 /* Globals */
222 static DC dc;
223 static XWindow xw;
224 static Term term;
225 static CSIEscape escseq;
226 static int cmdfd;
227 static pid_t pid;
228 static Selection sel;
229 static char *opt_cmd = NULL;
230 static char *opt_title = NULL;
231
232 void
233 selinit(void) {
234 sel.mode = 0;
235 sel.bx = -1;
236 sel.clip = NULL;
237 }
238
239 static inline int selected(int x, int y) {
240 if(sel.ey == y && sel.by == y) {
241 int bx = MIN(sel.bx, sel.ex);
242 int ex = MAX(sel.bx, sel.ex);
243 return BETWEEN(x, bx, ex);
244 }
245 return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
246 || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
247 }
248
249 static void getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
250 if(b)
251 *b = e->xbutton.button;
252
253 *x = e->xbutton.x/xw.cw;
254 *y = e->xbutton.y/xw.ch;
255 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
256 sel.b.y = MIN(sel.by, sel.ey);
257 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
258 sel.e.y = MAX(sel.by, sel.ey);
259 }
260
261 static void bpress(XEvent *e) {
262 sel.mode = 1;
263 sel.ex = sel.bx = e->xbutton.x/xw.cw;
264 sel.ey = sel.by = e->xbutton.y/xw.ch;
265 }
266
267 static char *getseltext() {
268 char *str, *ptr;
269 int ls, x, y, sz;
270 if(sel.bx == -1)
271 return NULL;
272 sz = (term.col+1) * (sel.e.y-sel.b.y+1);
273 ptr = str = malloc(sz);
274 for(y = 0; y < term.row; y++) {
275 for(x = 0; x < term.col; x++)
276 if(term.line[y][x].state & GLYPH_SET && (ls = selected(x, y)))
277 *ptr = term.line[y][x].c, ptr++;
278 if(ls)
279 *ptr = '\n', ptr++;
280 }
281 *ptr = 0;
282 return str;
283 }
284
285 static void selection_notify(XEvent *e) {
286 unsigned long nitems;
287 unsigned long length;
288 int format, res;
289 unsigned char *data;
290 Atom type;
291
292 res = XGetWindowProperty(xw.dis, xw.win, XA_PRIMARY, 0, 0, False,
293 AnyPropertyType, &type, &format, &nitems, &length, &data);
294 switch(res) {
295 case BadAtom:
296 case BadValue:
297 case BadWindow:
298 fprintf(stderr, "Invalid paste, XGetWindowProperty0");
299 return;
300 }
301
302 res = XGetWindowProperty(xw.dis, xw.win, XA_PRIMARY, 0, length, False,
303 AnyPropertyType, &type, &format, &nitems, &length, &data);
304 switch(res) {
305 case BadAtom:
306 case BadValue:
307 case BadWindow:
308 fprintf(stderr, "Invalid paste, XGetWindowProperty0");
309 return;
310 }
311
312 if(data) {
313 ttywrite((const char *) data, nitems * format / 8);
314 XFree(data);
315 }
316 }
317
318 static void selpaste() {
319 XConvertSelection(xw.dis, XA_PRIMARY, XA_STRING, XA_PRIMARY, xw.win, CurrentTime);
320 }
321
322 static void selection_request(XEvent *e)
323 {
324 XSelectionRequestEvent *xsre;
325 XSelectionEvent xev;
326 int res;
327 Atom xa_targets;
328
329 xsre = (XSelectionRequestEvent *) e;
330 xev.type = SelectionNotify;
331 xev.requestor = xsre->requestor;
332 xev.selection = xsre->selection;
333 xev.target = xsre->target;
334 xev.time = xsre->time;
335 /* reject */
336 xev.property = None;
337
338 xa_targets = XInternAtom(xw.dis, "TARGETS", 0);
339 if(xsre->target == xa_targets) {
340 /* respond with the supported type */
341 Atom string = XA_STRING;
342 res = XChangeProperty(xsre->display, xsre->requestor, xsre->property, XA_ATOM, 32,
343 PropModeReplace, (unsigned char *) &string, 1);
344 switch(res) {
345 case BadAlloc:
346 case BadAtom:
347 case BadMatch:
348 case BadValue:
349 case BadWindow:
350 fprintf(stderr, "Error in selection_request, TARGETS");
351 break;
352 default:
353 xev.property = xsre->property;
354 }
355 } else if(xsre->target == XA_STRING) {
356 res = XChangeProperty(xsre->display, xsre->requestor, xsre->property,
357 xsre->target, 8, PropModeReplace, (unsigned char *) sel.clip,
358 strlen(sel.clip));
359 switch(res) {
360 case BadAlloc:
361 case BadAtom:
362 case BadMatch:
363 case BadValue:
364 case BadWindow:
365 fprintf(stderr, "Error in selection_request, XA_STRING");
366 break;
367 default:
368 xev.property = xsre->property;
369 }
370 }
371
372 /* all done, send a notification to the listener */
373 res = XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev);
374 switch(res) {
375 case 0:
376 case BadValue:
377 case BadWindow:
378 fprintf(stderr, "Error in selection_requested, XSendEvent");
379 }
380 }
381
382 static void selcopy(char *str) {
383 /* register the selection for both the clipboard and the primary */
384 Atom clipboard;
385 int res;
386
387 free(sel.clip);
388 sel.clip = str;
389
390 res = XSetSelectionOwner(xw.dis, XA_PRIMARY, xw.win, CurrentTime);
391 switch(res) {
392 case BadAtom:
393 case BadWindow:
394 fprintf(stderr, "Invalid copy, XSetSelectionOwner");
395 return;
396 }
397
398 clipboard = XInternAtom(xw.dis, "CLIPBOARD", 0);
399 res = XSetSelectionOwner(xw.dis, clipboard, xw.win, CurrentTime);
400 switch(res) {
401 case BadAtom:
402 case BadWindow:
403 fprintf(stderr, "Invalid copy, XSetSelectionOwner");
404 return;
405 }
406
407 XFlush(xw.dis);
408 }
409
410 /* TODO: doubleclick to select word */
411 static void brelease(XEvent *e) {
412 int b;
413 sel.mode = 0;
414 getbuttoninfo(e, &b, &sel.ex, &sel.ey);
415 if(sel.bx==sel.ex && sel.by==sel.ey) {
416 sel.bx = -1;
417 if(b==2)
418 selpaste();
419 } else {
420 if(b==1)
421 selcopy(getseltext());
422 }
423 draw(1);
424 }
425
426 static void bmotion(XEvent *e) {
427 if (sel.mode) {
428 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
429 draw(1);
430 }
431 }
432
433 #ifdef DEBUG
434 void
435 tdump(void) {
436 int row, col;
437 Glyph c;
438
439 for(row = 0; row < term.row; row++) {
440 for(col = 0; col < term.col; col++) {
441 if(col == term.c.x && row == term.c.y)
442 putchar('#');
443 else {
444 c = term.line[row][col];
445 putchar(c.state & GLYPH_SET ? c.c : '.');
446 }
447 }
448 putchar('\n');
449 }
450 }
451 #endif
452
453 void
454 die(const char *errstr, ...) {
455 va_list ap;
456
457 va_start(ap, errstr);
458 vfprintf(stderr, errstr, ap);
459 va_end(ap);
460 exit(EXIT_FAILURE);
461 }
462
463 void
464 execsh(void) {
465 char *args[] = {getenv("SHELL"), "-i", NULL};
466 if(opt_cmd)
467 args[0] = opt_cmd, args[1] = NULL;
468 else
469 DEFAULT(args[0], SHELL);
470 putenv("TERM="TNAME);
471 execvp(args[0], args);
472 }
473
474 void
475 sigchld(int a) {
476 int stat = 0;
477 if(waitpid(pid, &stat, 0) < 0)
478 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
479 if(WIFEXITED(stat))
480 exit(WEXITSTATUS(stat));
481 else
482 exit(EXIT_FAILURE);
483 }
484
485 void
486 ttynew(void) {
487 int m, s;
488
489 /* seems to work fine on linux, openbsd and freebsd */
490 struct winsize w = {term.row, term.col, 0, 0};
491 if(openpty(&m, &s, NULL, NULL, &w) < 0)
492 die("openpty failed: %s\n", SERRNO);
493
494 switch(pid = fork()) {
495 case -1:
496 die("fork failed\n");
497 break;
498 case 0:
499 setsid(); /* create a new process group */
500 dup2(s, STDIN_FILENO);
501 dup2(s, STDOUT_FILENO);
502 dup2(s, STDERR_FILENO);
503 if(ioctl(s, TIOCSCTTY, NULL) < 0)
504 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
505 close(s);
506 close(m);
507 execsh();
508 break;
509 default:
510 close(s);
511 cmdfd = m;
512 signal(SIGCHLD, sigchld);
513 }
514 }
515
516 void
517 dump(char c) {
518 static int col;
519 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
520 if(++col % 10 == 0)
521 fprintf(stderr, "\n");
522 }
523
524 void
525 ttyread(void) {
526 char buf[BUFSIZ];
527 int ret;
528
529 if((ret = read(cmdfd, buf, LEN(buf))) < 0)
530 die("Couldn't read from shell: %s\n", SERRNO);
531 else
532 tputs(buf, ret);
533 }
534
535 void
536 ttywrite(const char *s, size_t n) {
537 if(write(cmdfd, s, n) == -1)
538 die("write error on tty: %s\n", SERRNO);
539 }
540
541 void
542 ttyresize(int x, int y) {
543 struct winsize w;
544
545 w.ws_row = term.row;
546 w.ws_col = term.col;
547 w.ws_xpixel = w.ws_ypixel = 0;
548 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
549 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
550 }
551
552 void
553 tcursor(int mode) {
554 static TCursor c;
555
556 if(mode == CURSOR_SAVE)
557 c = term.c;
558 else if(mode == CURSOR_LOAD)
559 term.c = c, tmoveto(c.x, c.y);
560 }
561
562 void
563 treset(void) {
564 term.c = (TCursor){{
565 .mode = ATTR_NULL,
566 .fg = DefaultFG,
567 .bg = DefaultBG
568 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
569
570 term.top = 0, term.bot = term.row - 1;
571 term.mode = MODE_WRAP;
572 tclearregion(0, 0, term.col-1, term.row-1);
573 }
574
575 void
576 tnew(int col, int row) {
577 /* set screen size */
578 term.row = row, term.col = col;
579 term.line = malloc(term.row * sizeof(Line));
580 term.alt = malloc(term.row * sizeof(Line));
581 for(row = 0 ; row < term.row; row++) {
582 term.line[row] = malloc(term.col * sizeof(Glyph));
583 term.alt [row] = malloc(term.col * sizeof(Glyph));
584 }
585 /* setup screen */
586 treset();
587 }
588
589 void
590 tswapscreen(void) {
591 Line* tmp = term.line;
592 term.line = term.alt;
593 term.alt = tmp;
594 term.mode ^= MODE_ALTSCREEN;
595 }
596
597 void
598 tscrolldown(int orig, int n) {
599 int i;
600 Line temp;
601
602 LIMIT(n, 0, term.bot-orig+1);
603
604 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
605
606 for(i = term.bot; i >= orig+n; i--) {
607 temp = term.line[i];
608 term.line[i] = term.line[i-n];
609 term.line[i-n] = temp;
610 }
611 }
612
613 void
614 tscrollup(int orig, int n) {
615 int i;
616 Line temp;
617 LIMIT(n, 0, term.bot-orig+1);
618
619 tclearregion(0, orig, term.col-1, orig+n-1);
620
621 for(i = orig; i <= term.bot-n; i++) {
622 temp = term.line[i];
623 term.line[i] = term.line[i+n];
624 term.line[i+n] = temp;
625 }
626 }
627
628 void
629 tnewline(void) {
630 int x = term.c.x+1 < term.col ? term.c.x : 0;
631 int y = term.c.y;
632 if(term.c.y == term.bot)
633 tscrollup(term.top, 1);
634 else
635 y++;
636 tmoveto(x, y);
637 }
638
639 void
640 csiparse(void) {
641 /* int noarg = 1; */
642 char *p = escseq.buf;
643
644 escseq.narg = 0;
645 if(*p == '?')
646 escseq.priv = 1, p++;
647
648 while(p < escseq.buf+escseq.len) {
649 while(isdigit(*p)) {
650 escseq.arg[escseq.narg] *= 10;
651 escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
652 }
653 if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
654 escseq.narg++, p++;
655 else {
656 escseq.mode = *p;
657 escseq.narg++;
658 return;
659 }
660 }
661 }
662
663 void
664 tmoveto(int x, int y) {
665 LIMIT(x, 0, term.col-1);
666 LIMIT(y, 0, term.row-1);
667 term.c.state &= ~CURSOR_WRAPNEXT;
668 term.c.x = x;
669 term.c.y = y;
670 }
671
672 void
673 tsetchar(char c) {
674 term.line[term.c.y][term.c.x] = term.c.attr;
675 term.line[term.c.y][term.c.x].c = c;
676 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
677 }
678
679 void
680 tclearregion(int x1, int y1, int x2, int y2) {
681 int x, y, temp;
682
683 if(x1 > x2)
684 temp = x1, x1 = x2, x2 = temp;
685 if(y1 > y2)
686 temp = y1, y1 = y2, y2 = temp;
687
688 LIMIT(x1, 0, term.col-1);
689 LIMIT(x2, 0, term.col-1);
690 LIMIT(y1, 0, term.row-1);
691 LIMIT(y2, 0, term.row-1);
692
693 for(y = y1; y <= y2; y++)
694 for(x = x1; x <= x2; x++)
695 term.line[y][x].state = 0;
696 }
697
698 void
699 tdeletechar(int n) {
700 int src = term.c.x + n;
701 int dst = term.c.x;
702 int size = term.col - src;
703
704 if(src >= term.col) {
705 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
706 return;
707 }
708 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
709 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
710 }
711
712 void
713 tinsertblank(int n) {
714 int src = term.c.x;
715 int dst = src + n;
716 int size = term.col - dst;
717
718 if(dst >= term.col) {
719 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
720 return;
721 }
722 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
723 tclearregion(src, term.c.y, dst - 1, term.c.y);
724 }
725
726 void
727 tinsertblankline(int n) {
728 if(term.c.y < term.top || term.c.y > term.bot)
729 return;
730
731 tscrolldown(term.c.y, n);
732 }
733
734 void
735 tdeleteline(int n) {
736 if(term.c.y < term.top || term.c.y > term.bot)
737 return;
738
739 tscrollup(term.c.y, n);
740 }
741
742 void
743 tsetattr(int *attr, int l) {
744 int i;
745
746 for(i = 0; i < l; i++) {
747 switch(attr[i]) {
748 case 0:
749 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
750 term.c.attr.fg = DefaultFG;
751 term.c.attr.bg = DefaultBG;
752 break;
753 case 1:
754 term.c.attr.mode |= ATTR_BOLD;
755 break;
756 case 4:
757 term.c.attr.mode |= ATTR_UNDERLINE;
758 break;
759 case 7:
760 term.c.attr.mode |= ATTR_REVERSE;
761 break;
762 case 22:
763 term.c.attr.mode &= ~ATTR_BOLD;
764 break;
765 case 24:
766 term.c.attr.mode &= ~ATTR_UNDERLINE;
767 break;
768 case 27:
769 term.c.attr.mode &= ~ATTR_REVERSE;
770 break;
771 case 38:
772 if (i + 2 < l && attr[i + 1] == 5) {
773 i += 2;
774 if (BETWEEN(attr[i], 0, 255))
775 term.c.attr.fg = attr[i];
776 else
777 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
778 }
779 else
780 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
781 break;
782 case 39:
783 term.c.attr.fg = DefaultFG;
784 break;
785 case 48:
786 if (i + 2 < l && attr[i + 1] == 5) {
787 i += 2;
788 if (BETWEEN(attr[i], 0, 255))
789 term.c.attr.bg = attr[i];
790 else
791 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
792 }
793 else
794 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
795 break;
796 case 49:
797 term.c.attr.bg = DefaultBG;
798 break;
799 default:
800 if(BETWEEN(attr[i], 30, 37))
801 term.c.attr.fg = attr[i] - 30;
802 else if(BETWEEN(attr[i], 40, 47))
803 term.c.attr.bg = attr[i] - 40;
804 else if(BETWEEN(attr[i], 90, 97))
805 term.c.attr.fg = attr[i] - 90 + 8;
806 else if(BETWEEN(attr[i], 100, 107))
807 term.c.attr.fg = attr[i] - 100 + 8;
808 else
809 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]), csidump();
810
811 break;
812 }
813 }
814 }
815
816 void
817 tsetscroll(int t, int b) {
818 int temp;
819
820 LIMIT(t, 0, term.row-1);
821 LIMIT(b, 0, term.row-1);
822 if(t > b) {
823 temp = t;
824 t = b;
825 b = temp;
826 }
827 term.top = t;
828 term.bot = b;
829 }
830
831 void
832 csihandle(void) {
833 switch(escseq.mode) {
834 default:
835 unknown:
836 printf("erresc: unknown csi ");
837 csidump();
838 /* die(""); */
839 break;
840 case '@': /* ICH -- Insert <n> blank char */
841 DEFAULT(escseq.arg[0], 1);
842 tinsertblank(escseq.arg[0]);
843 break;
844 case 'A': /* CUU -- Cursor <n> Up */
845 case 'e':
846 DEFAULT(escseq.arg[0], 1);
847 tmoveto(term.c.x, term.c.y-escseq.arg[0]);
848 break;
849 case 'B': /* CUD -- Cursor <n> Down */
850 DEFAULT(escseq.arg[0], 1);
851 tmoveto(term.c.x, term.c.y+escseq.arg[0]);
852 break;
853 case 'C': /* CUF -- Cursor <n> Forward */
854 case 'a':
855 DEFAULT(escseq.arg[0], 1);
856 tmoveto(term.c.x+escseq.arg[0], term.c.y);
857 break;
858 case 'D': /* CUB -- Cursor <n> Backward */
859 DEFAULT(escseq.arg[0], 1);
860 tmoveto(term.c.x-escseq.arg[0], term.c.y);
861 break;
862 case 'E': /* CNL -- Cursor <n> Down and first col */
863 DEFAULT(escseq.arg[0], 1);
864 tmoveto(0, term.c.y+escseq.arg[0]);
865 break;
866 case 'F': /* CPL -- Cursor <n> Up and first col */
867 DEFAULT(escseq.arg[0], 1);
868 tmoveto(0, term.c.y-escseq.arg[0]);
869 break;
870 case 'G': /* CHA -- Move to <col> */
871 case '`': /* XXX: HPA -- same? */
872 DEFAULT(escseq.arg[0], 1);
873 tmoveto(escseq.arg[0]-1, term.c.y);
874 break;
875 case 'H': /* CUP -- Move to <row> <col> */
876 case 'f': /* XXX: HVP -- same? */
877 DEFAULT(escseq.arg[0], 1);
878 DEFAULT(escseq.arg[1], 1);
879 tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
880 break;
881 /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
882 case 'J': /* ED -- Clear screen */
883 switch(escseq.arg[0]) {
884 case 0: /* below */
885 tclearregion(term.c.x, term.c.y, term.col-1, term.row-1);
886 break;
887 case 1: /* above */
888 tclearregion(0, 0, term.c.x, term.c.y);
889 break;
890 case 2: /* all */
891 tclearregion(0, 0, term.col-1, term.row-1);
892 break;
893 default:
894 goto unknown;
895 }
896 break;
897 case 'K': /* EL -- Clear line */
898 switch(escseq.arg[0]) {
899 case 0: /* right */
900 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
901 break;
902 case 1: /* left */
903 tclearregion(0, term.c.y, term.c.x, term.c.y);
904 break;
905 case 2: /* all */
906 tclearregion(0, term.c.y, term.col-1, term.c.y);
907 break;
908 }
909 break;
910 case 'S': /* SU -- Scroll <n> line up */
911 DEFAULT(escseq.arg[0], 1);
912 tscrollup(term.top, escseq.arg[0]);
913 break;
914 case 'T': /* SD -- Scroll <n> line down */
915 DEFAULT(escseq.arg[0], 1);
916 tscrolldown(term.top, escseq.arg[0]);
917 break;
918 case 'L': /* IL -- Insert <n> blank lines */
919 DEFAULT(escseq.arg[0], 1);
920 tinsertblankline(escseq.arg[0]);
921 break;
922 case 'l': /* RM -- Reset Mode */
923 if(escseq.priv) {
924 switch(escseq.arg[0]) {
925 case 1:
926 term.mode &= ~MODE_APPKEYPAD;
927 break;
928 case 5: /* TODO: DECSCNM -- Remove reverse video */
929 break;
930 case 7:
931 term.mode &= ~MODE_WRAP;
932 break;
933 case 12: /* att610 -- Stop blinking cursor (IGNORED) */
934 break;
935 case 25:
936 term.c.state |= CURSOR_HIDE;
937 break;
938 case 1049: /* = 1047 and 1048 */
939 case 1047:
940 if(IS_SET(MODE_ALTSCREEN)) {
941 tclearregion(0, 0, term.col-1, term.row-1);
942 tswapscreen();
943 }
944 if(escseq.arg[0] == 1047)
945 break;
946 case 1048:
947 tcursor(CURSOR_LOAD);
948 break;
949 default:
950 goto unknown;
951 }
952 } else {
953 switch(escseq.arg[0]) {
954 case 4:
955 term.mode &= ~MODE_INSERT;
956 break;
957 default:
958 goto unknown;
959 }
960 }
961 break;
962 case 'M': /* DL -- Delete <n> lines */
963 DEFAULT(escseq.arg[0], 1);
964 tdeleteline(escseq.arg[0]);
965 break;
966 case 'X': /* ECH -- Erase <n> char */
967 DEFAULT(escseq.arg[0], 1);
968 tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
969 break;
970 case 'P': /* DCH -- Delete <n> char */
971 DEFAULT(escseq.arg[0], 1);
972 tdeletechar(escseq.arg[0]);
973 break;
974 /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
975 case 'd': /* VPA -- Move to <row> */
976 DEFAULT(escseq.arg[0], 1);
977 tmoveto(term.c.x, escseq.arg[0]-1);
978 break;
979 case 'h': /* SM -- Set terminal mode */
980 if(escseq.priv) {
981 switch(escseq.arg[0]) {
982 case 1:
983 term.mode |= MODE_APPKEYPAD;
984 break;
985 case 5: /* DECSCNM -- Reverve video */
986 /* TODO: set REVERSE on the whole screen (f) */
987 break;
988 case 7:
989 term.mode |= MODE_WRAP;
990 break;
991 case 12: /* att610 -- Start blinking cursor (IGNORED) */
992 /* fallthrough for xterm cvvis = CSI [ ? 12 ; 25 h */
993 if(escseq.narg > 1 && escseq.arg[1] != 25)
994 break;
995 case 25:
996 term.c.state &= ~CURSOR_HIDE;
997 break;
998 case 1049: /* = 1047 and 1048 */
999 case 1047:
1000 if(IS_SET(MODE_ALTSCREEN))
1001 tclearregion(0, 0, term.col-1, term.row-1);
1002 else
1003 tswapscreen();
1004 if(escseq.arg[0] == 1047)
1005 break;
1006 case 1048:
1007 tcursor(CURSOR_SAVE);
1008 break;
1009 default: goto unknown;
1010 }
1011 } else {
1012 switch(escseq.arg[0]) {
1013 case 4:
1014 term.mode |= MODE_INSERT;
1015 break;
1016 default: goto unknown;
1017 }
1018 };
1019 break;
1020 case 'm': /* SGR -- Terminal attribute (color) */
1021 tsetattr(escseq.arg, escseq.narg);
1022 break;
1023 case 'r': /* DECSTBM -- Set Scrolling Region */
1024 if(escseq.priv)
1025 goto unknown;
1026 else {
1027 DEFAULT(escseq.arg[0], 1);
1028 DEFAULT(escseq.arg[1], term.row);
1029 tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
1030 tmoveto(0, 0);
1031 }
1032 break;
1033 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1034 tcursor(CURSOR_SAVE);
1035 break;
1036 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1037 tcursor(CURSOR_LOAD);
1038 break;
1039 }
1040 }
1041
1042 void
1043 csidump(void) {
1044 int i;
1045 printf("ESC [ %s", escseq.priv ? "? " : "");
1046 if(escseq.narg)
1047 for(i = 0; i < escseq.narg; i++)
1048 printf("%d ", escseq.arg[i]);
1049 if(escseq.mode)
1050 putchar(escseq.mode);
1051 putchar('\n');
1052 }
1053
1054 void
1055 csireset(void) {
1056 memset(&escseq, 0, sizeof(escseq));
1057 }
1058
1059 void
1060 tputtab(void) {
1061 int space = TAB - term.c.x % TAB;
1062 tmoveto(term.c.x + space, term.c.y);
1063 }
1064
1065 void
1066 tputc(char c) {
1067 if(term.esc & ESC_START) {
1068 if(term.esc & ESC_CSI) {
1069 escseq.buf[escseq.len++] = c;
1070 if(BETWEEN(c, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
1071 term.esc = 0;
1072 csiparse(), csihandle();
1073 }
1074 /* TODO: handle other OSC */
1075 } else if(term.esc & ESC_OSC) {
1076 if(c == ';') {
1077 term.titlelen = 0;
1078 term.esc = ESC_START | ESC_TITLE;
1079 }
1080 } else if(term.esc & ESC_TITLE) {
1081 if(c == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
1082 term.esc = 0;
1083 term.title[term.titlelen] = '\0';
1084 XStoreName(xw.dis, xw.win, term.title);
1085 } else {
1086 term.title[term.titlelen++] = c;
1087 }
1088 } else if(term.esc & ESC_ALTCHARSET) {
1089 switch(c) {
1090 case '0': /* Line drawing crap */
1091 term.c.attr.mode |= ATTR_GFX;
1092 break;
1093 case 'B': /* Back to regular text */
1094 term.c.attr.mode &= ~ATTR_GFX;
1095 break;
1096 default:
1097 printf("esc unhandled charset: ESC ( %c\n", c);
1098 }
1099 term.esc = 0;
1100 } else {
1101 switch(c) {
1102 case '[':
1103 term.esc |= ESC_CSI;
1104 break;
1105 case ']':
1106 term.esc |= ESC_OSC;
1107 break;
1108 case '(':
1109 term.esc |= ESC_ALTCHARSET;
1110 break;
1111 case 'D': /* IND -- Linefeed */
1112 if(term.c.y == term.bot)
1113 tscrollup(term.top, 1);
1114 else
1115 tmoveto(term.c.x, term.c.y+1);
1116 term.esc = 0;
1117 break;
1118 case 'E': /* NEL -- Next line */
1119 tnewline();
1120 term.esc = 0;
1121 break;
1122 case 'M': /* RI -- Reverse index */
1123 if(term.c.y == term.top)
1124 tscrolldown(term.top, 1);
1125 else
1126 tmoveto(term.c.x, term.c.y-1);
1127 term.esc = 0;
1128 break;
1129 case 'c': /* RIS -- Reset to inital state */
1130 treset();
1131 term.esc = 0;
1132 break;
1133 case '=': /* DECPAM -- Application keypad */
1134 term.mode |= MODE_APPKEYPAD;
1135 term.esc = 0;
1136 break;
1137 case '>': /* DECPNM -- Normal keypad */
1138 term.mode &= ~MODE_APPKEYPAD;
1139 term.esc = 0;
1140 break;
1141 case '7': /* DECSC -- Save Cursor */
1142 tcursor(CURSOR_SAVE);
1143 term.esc = 0;
1144 break;
1145 case '8': /* DECRC -- Restore Cursor */
1146 tcursor(CURSOR_LOAD);
1147 term.esc = 0;
1148 break;
1149 default:
1150 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n", c, isprint(c)?c:'.');
1151 term.esc = 0;
1152 }
1153 }
1154 } else {
1155 switch(c) {
1156 case '\t':
1157 tputtab();
1158 break;
1159 case '\b':
1160 tmoveto(term.c.x-1, term.c.y);
1161 break;
1162 case '\r':
1163 tmoveto(0, term.c.y);
1164 break;
1165 case '\n':
1166 tnewline();
1167 break;
1168 case '\a':
1169 if(!(xw.state & WIN_FOCUSED))
1170 xseturgency(1);
1171 break;
1172 case '\033':
1173 csireset();
1174 term.esc = ESC_START;
1175 break;
1176 default:
1177 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1178 tnewline();
1179 tsetchar(c);
1180 if(term.c.x+1 < term.col)
1181 tmoveto(term.c.x+1, term.c.y);
1182 else
1183 term.c.state |= CURSOR_WRAPNEXT;
1184 break;
1185 }
1186 }
1187 }
1188
1189 void
1190 tputs(char *s, int len) {
1191 for(; len > 0; len--)
1192 tputc(*s++);
1193 }
1194
1195 void
1196 tresize(int col, int row) {
1197 int i, x;
1198 int minrow = MIN(row, term.row);
1199 int mincol = MIN(col, term.col);
1200 int slide = term.c.y - row + 1;
1201
1202 if(col < 1 || row < 1)
1203 return;
1204
1205 /* free unneeded rows */
1206 i = 0;
1207 if(slide > 0) {
1208 /* slide screen to keep cursor where we expect it -
1209 * tscrollup would work here, but we can optimize to
1210 * memmove because we're freeing the earlier lines */
1211 for(/* i = 0 */; i < slide; i++) {
1212 free(term.line[i]);
1213 free(term.alt[i]);
1214 }
1215 memmove(term.line, term.line + slide, row * sizeof(Line));
1216 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1217 }
1218 for(i += row; i < term.row; i++) {
1219 free(term.line[i]);
1220 free(term.alt[i]);
1221 }
1222
1223 /* resize to new height */
1224 term.line = realloc(term.line, row * sizeof(Line));
1225 term.alt = realloc(term.alt, row * sizeof(Line));
1226
1227 /* resize each row to new width, zero-pad if needed */
1228 for(i = 0; i < minrow; i++) {
1229 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
1230 term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
1231 for(x = mincol; x < col; x++) {
1232 term.line[i][x].state = 0;
1233 term.alt[i][x].state = 0;
1234 }
1235 }
1236
1237 /* allocate any new rows */
1238 for(/* i == minrow */; i < row; i++) {
1239 term.line[i] = calloc(col, sizeof(Glyph));
1240 term.alt [i] = calloc(col, sizeof(Glyph));
1241 }
1242
1243 /* update terminal size */
1244 term.col = col, term.row = row;
1245 /* make use of the LIMIT in tmoveto */
1246 tmoveto(term.c.x, term.c.y);
1247 /* reset scrolling region */
1248 tsetscroll(0, row-1);
1249 }
1250
1251 void
1252 xloadcols(void) {
1253 int i, r, g, b;
1254 XColor color;
1255 unsigned long white = WhitePixel(xw.dis, xw.scr);
1256
1257 for(i = 0; i < 16; i++) {
1258 if (!XAllocNamedColor(xw.dis, xw.cmap, colorname[i], &color, &color)) {
1259 dc.col[i] = white;
1260 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1261 } else
1262 dc.col[i] = color.pixel;
1263 }
1264
1265 /* same colors as xterm */
1266 for(r = 0; r < 6; r++)
1267 for(g = 0; g < 6; g++)
1268 for(b = 0; b < 6; b++) {
1269 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1270 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1271 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1272 if (!XAllocColor(xw.dis, xw.cmap, &color)) {
1273 dc.col[i] = white;
1274 fprintf(stderr, "Could not allocate color %d\n", i);
1275 } else
1276 dc.col[i] = color.pixel;
1277 i++;
1278 }
1279
1280 for(r = 0; r < 24; r++, i++) {
1281 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1282 if (!XAllocColor(xw.dis, xw.cmap, &color)) {
1283 dc.col[i] = white;
1284 fprintf(stderr, "Could not allocate color %d\n", i);
1285 } else
1286 dc.col[i] = color.pixel;
1287 }
1288 }
1289
1290 void
1291 xclear(int x1, int y1, int x2, int y2) {
1292 XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1293 XFillRectangle(xw.dis, xw.buf, dc.gc,
1294 x1 * xw.cw, y1 * xw.ch,
1295 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1296 }
1297
1298 void
1299 xhints(void)
1300 {
1301 XClassHint class = {TNAME, TNAME};
1302 XWMHints wm = {.flags = InputHint, .input = 1};
1303 XSizeHints size = {
1304 .flags = PSize | PResizeInc | PBaseSize,
1305 .height = xw.h,
1306 .width = xw.w,
1307 .height_inc = xw.ch,
1308 .width_inc = xw.cw,
1309 .base_height = 2*BORDER,
1310 .base_width = 2*BORDER,
1311 };
1312 XSetWMProperties(xw.dis, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1313 }
1314
1315 void
1316 xinit(void) {
1317 XSetWindowAttributes attrs;
1318
1319 if(!(xw.dis = XOpenDisplay(NULL)))
1320 die("Can't open display\n");
1321 xw.scr = XDefaultScreen(xw.dis);
1322
1323 /* font */
1324 if(!(dc.font = XLoadQueryFont(xw.dis, FONT)) || !(dc.bfont = XLoadQueryFont(xw.dis, BOLDFONT)))
1325 die("Can't load font %s\n", dc.font ? BOLDFONT : FONT);
1326
1327 /* XXX: Assuming same size for bold font */
1328 xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing;
1329 xw.ch = dc.font->ascent + dc.font->descent;
1330
1331 /* colors */
1332 xw.cmap = XDefaultColormap(xw.dis, xw.scr);
1333 xloadcols();
1334
1335 /* window - default size */
1336 xw.bufh = 24 * xw.ch;
1337 xw.bufw = 80 * xw.cw;
1338 xw.h = xw.bufh + 2*BORDER;
1339 xw.w = xw.bufw + 2*BORDER;
1340
1341 attrs.background_pixel = dc.col[DefaultBG];
1342 attrs.border_pixel = dc.col[DefaultBG];
1343 attrs.bit_gravity = NorthWestGravity;
1344 attrs.event_mask = FocusChangeMask | KeyPressMask
1345 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1346 | PointerMotionMask | ButtonPressMask | ButtonReleaseMask;
1347 attrs.colormap = xw.cmap;
1348
1349 xw.win = XCreateWindow(xw.dis, XRootWindow(xw.dis, xw.scr), 0, 0,
1350 xw.w, xw.h, 0, XDefaultDepth(xw.dis, xw.scr), InputOutput,
1351 XDefaultVisual(xw.dis, xw.scr),
1352 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
1353 | CWColormap,
1354 &attrs);
1355 xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1356
1357
1358 /* input methods */
1359 xw.xim = XOpenIM(xw.dis, NULL, NULL, NULL);
1360 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
1361 | XIMStatusNothing, XNClientWindow, xw.win,
1362 XNFocusWindow, xw.win, NULL);
1363 /* gc */
1364 dc.gc = XCreateGC(xw.dis, xw.win, 0, NULL);
1365
1366 XMapWindow(xw.dis, xw.win);
1367 xhints();
1368 XStoreName(xw.dis, xw.win, opt_title ? opt_title : "st");
1369 XSync(xw.dis, 0);
1370 }
1371
1372 void
1373 xdraws(char *s, Glyph base, int x, int y, int len) {
1374 unsigned long xfg, xbg;
1375 int winx = x*xw.cw, winy = y*xw.ch + dc.font->ascent, width = len*xw.cw;
1376 int i;
1377
1378 if(base.mode & ATTR_REVERSE)
1379 xfg = dc.col[base.bg], xbg = dc.col[base.fg];
1380 else
1381 xfg = dc.col[base.fg], xbg = dc.col[base.bg];
1382
1383 XSetBackground(xw.dis, dc.gc, xbg);
1384 XSetForeground(xw.dis, dc.gc, xfg);
1385
1386 if(base.mode & ATTR_GFX)
1387 for(i = 0; i < len; i++) {
1388 char c = gfx[(unsigned int)s[i] % 256];
1389 if(c)
1390 s[i] = c;
1391 else if(s[i] > 0x5f)
1392 s[i] -= 0x5f;
1393 }
1394
1395 XSetFont(xw.dis, dc.gc, base.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1396 XDrawImageString(xw.dis, xw.buf, dc.gc, winx, winy, s, len);
1397
1398 if(base.mode & ATTR_UNDERLINE)
1399 XDrawLine(xw.dis, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1400 }
1401
1402 void
1403 xdrawcursor(void) {
1404 static int oldx = 0;
1405 static int oldy = 0;
1406 Glyph g = {' ', ATTR_NULL, DefaultBG, DefaultCS, 0};
1407
1408 LIMIT(oldx, 0, term.col-1);
1409 LIMIT(oldy, 0, term.row-1);
1410
1411 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
1412 g.c = term.line[term.c.y][term.c.x].c;
1413
1414 /* remove the old cursor */
1415 if(term.line[oldy][oldx].state & GLYPH_SET)
1416 xdraws(&term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1);
1417 else
1418 xclear(oldx, oldy, oldx, oldy);
1419
1420 /* draw the new one */
1421 if(!(term.c.state & CURSOR_HIDE) && (xw.state & WIN_FOCUSED)) {
1422 xdraws(&g.c, g, term.c.x, term.c.y, 1);
1423 oldx = term.c.x, oldy = term.c.y;
1424 }
1425 }
1426
1427 #ifdef DEBUG
1428 /* basic drawing routines */
1429 void
1430 xdrawc(int x, int y, Glyph g) {
1431 XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
1432 XSetBackground(xw.dis, dc.gc, dc.col[g.bg]);
1433 XSetForeground(xw.dis, dc.gc, dc.col[g.fg]);
1434 XSetFont(xw.dis, dc.gc, g.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1435 XDrawImageString(xw.dis, xw.buf, dc.gc, r.x, r.y+dc.font->ascent, &g.c, 1);
1436 }
1437
1438 void
1439 draw(int dummy) {
1440 int x, y;
1441
1442 xclear(0, 0, term.col-1, term.row-1);
1443 for(y = 0; y < term.row; y++)
1444 for(x = 0; x < term.col; x++)
1445 if(term.line[y][x].state & GLYPH_SET)
1446 xdrawc(x, y, term.line[y][x]);
1447
1448 xdrawcursor();
1449 XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1450 XFlush(xw.dis);
1451 }
1452
1453 #else
1454 /* optimized drawing routine */
1455 void
1456 draw(int redraw_all) {
1457 int i, x, y, ox;
1458 Glyph base, new;
1459 char buf[DRAW_BUF_SIZ];
1460
1461 if(!(xw.state & WIN_VISIBLE))
1462 return;
1463
1464 xclear(0, 0, term.col-1, term.row-1);
1465 for(y = 0; y < term.row; y++) {
1466 base = term.line[y][0];
1467 i = ox = 0;
1468 for(x = 0; x < term.col; x++) {
1469 new = term.line[y][x];
1470 if(sel.bx!=-1 && new.c && selected(x, y))
1471 new.mode ^= ATTR_REVERSE;
1472 if(i > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
1473 i >= DRAW_BUF_SIZ)) {
1474 xdraws(buf, base, ox, y, i);
1475 i = 0;
1476 }
1477 if(new.state & GLYPH_SET) {
1478 if(i == 0) {
1479 ox = x;
1480 base = new;
1481 }
1482 buf[i++] = new.c;
1483 }
1484 }
1485 if(i > 0)
1486 xdraws(buf, base, ox, y, i);
1487 }
1488 xdrawcursor();
1489 XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1490 }
1491
1492 #endif
1493
1494 void
1495 expose(XEvent *ev) {
1496 XExposeEvent *e = &ev->xexpose;
1497 if(xw.state & WIN_REDRAW) {
1498 if(!e->count) {
1499 xw.state &= ~WIN_REDRAW;
1500 draw(SCREEN_REDRAW);
1501 }
1502 } else
1503 XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, e->x-BORDER, e->y-BORDER,
1504 e->width, e->height, e->x, e->y);
1505 }
1506
1507 void
1508 visibility(XEvent *ev) {
1509 XVisibilityEvent *e = &ev->xvisibility;
1510 if(e->state == VisibilityFullyObscured)
1511 xw.state &= ~WIN_VISIBLE;
1512 else if(!(xw.state & WIN_VISIBLE))
1513 /* need a full redraw for next Expose, not just a buf copy */
1514 xw.state |= WIN_VISIBLE | WIN_REDRAW;
1515 }
1516
1517 void
1518 unmap(XEvent *ev) {
1519 xw.state &= ~WIN_VISIBLE;
1520 }
1521
1522 void
1523 xseturgency(int add) {
1524 XWMHints *h = XGetWMHints(xw.dis, xw.win);
1525 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
1526 XSetWMHints(xw.dis, xw.win, h);
1527 XFree(h);
1528 }
1529
1530 void
1531 focus(XEvent *ev) {
1532 if(ev->type == FocusIn) {
1533 xw.state |= WIN_FOCUSED;
1534 xseturgency(0);
1535 } else
1536 xw.state &= ~WIN_FOCUSED;
1537 draw(SCREEN_UPDATE);
1538 }
1539
1540 char*
1541 kmap(KeySym k) {
1542 int i;
1543 for(i = 0; i < LEN(key); i++)
1544 if(key[i].k == k)
1545 return (char*)key[i].s;
1546 return NULL;
1547 }
1548
1549 void
1550 kpress(XEvent *ev) {
1551 XKeyEvent *e = &ev->xkey;
1552 KeySym ksym;
1553 char buf[32];
1554 char *customkey;
1555 int len;
1556 int meta;
1557 int shift;
1558 Status status;
1559
1560 meta = e->state & Mod1Mask;
1561 shift = e->state & ShiftMask;
1562 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
1563
1564 if((customkey = kmap(ksym)))
1565 ttywrite(customkey, strlen(customkey));
1566 else if(len > 0) {
1567 buf[sizeof(buf)-1] = '\0';
1568 if(meta && len == 1)
1569 ttywrite("\033", 1);
1570 ttywrite(buf, len);
1571 } else
1572 switch(ksym) {
1573 case XK_Up:
1574 case XK_Down:
1575 case XK_Left:
1576 case XK_Right:
1577 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', "DACB"[ksym - XK_Left]);
1578 ttywrite(buf, 3);
1579 break;
1580 case XK_Insert:
1581 if(shift)
1582 selpaste();
1583 break;
1584 default:
1585 fprintf(stderr, "errkey: %d\n", (int)ksym);
1586 break;
1587 }
1588 }
1589
1590 void
1591 resize(XEvent *e) {
1592 int col, row;
1593
1594 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
1595 return;
1596
1597 xw.w = e->xconfigure.width;
1598 xw.h = e->xconfigure.height;
1599 xw.bufw = xw.w - 2*BORDER;
1600 xw.bufh = xw.h - 2*BORDER;
1601 col = xw.bufw / xw.cw;
1602 row = xw.bufh / xw.ch;
1603 tresize(col, row);
1604 ttyresize(col, row);
1605 xw.bufh = MAX(1, xw.bufh);
1606 xw.bufw = MAX(1, xw.bufw);
1607 XFreePixmap(xw.dis, xw.buf);
1608 xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1609 }
1610
1611 void
1612 run(void) {
1613 XEvent ev;
1614 fd_set rfd;
1615 int xfd = XConnectionNumber(xw.dis);
1616
1617 for(;;) {
1618 FD_ZERO(&rfd);
1619 FD_SET(cmdfd, &rfd);
1620 FD_SET(xfd, &rfd);
1621 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) < 0) {
1622 if(errno == EINTR)
1623 continue;
1624 die("select failed: %s\n", SERRNO);
1625 }
1626 if(FD_ISSET(cmdfd, &rfd)) {
1627 ttyread();
1628 draw(SCREEN_UPDATE);
1629 }
1630 while(XPending(xw.dis)) {
1631 XNextEvent(xw.dis, &ev);
1632 if (XFilterEvent(&ev, xw.win))
1633 continue;
1634 if(handler[ev.type])
1635 (handler[ev.type])(&ev);
1636 }
1637 }
1638 }
1639
1640 int
1641 main(int argc, char *argv[]) {
1642 int i;
1643
1644 for(i = 1; i < argc; i++) {
1645 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
1646 case 't':
1647 if(++i < argc) opt_title = argv[i];
1648 break;
1649 case 'e':
1650 if(++i < argc) opt_cmd = argv[i];
1651 break;
1652 case 'v':
1653 default:
1654 die(USAGE);
1655 }
1656 }
1657 setlocale(LC_CTYPE, "");
1658 tnew(80, 24);
1659 ttynew();
1660 xinit();
1661 selinit();
1662 run();
1663 return 0;
1664 }