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applied xclipboard patch. thx David Isaac Wolinsky.
[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
62 typedef struct {
63 char c; /* character code */
64 char mode; /* attribute flags */
65 int fg; /* foreground */
66 int bg; /* background */
67 char state; /* state flags */
68 } Glyph;
69
70 typedef Glyph* Line;
71
72 typedef struct {
73 Glyph attr; /* current char attributes */
74 int x;
75 int y;
76 char state;
77 } TCursor;
78
79 /* CSI Escape sequence structs */
80 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
81 typedef struct {
82 char buf[ESC_BUF_SIZ]; /* raw string */
83 int len; /* raw string length */
84 char priv;
85 int arg[ESC_ARG_SIZ];
86 int narg; /* nb of args */
87 char mode;
88 } CSIEscape;
89
90 /* Internal representation of the screen */
91 typedef struct {
92 int row; /* nb row */
93 int col; /* nb col */
94 Line* line; /* screen */
95 Line* alt; /* alternate screen */
96 TCursor c; /* cursor */
97 int top; /* top scroll limit */
98 int bot; /* bottom scroll limit */
99 int mode; /* terminal mode flags */
100 int esc; /* escape state flags */
101 char title[ESC_TITLE_SIZ];
102 int titlelen;
103 } Term;
104
105 /* Purely graphic info */
106 typedef struct {
107 Display* dis;
108 Colormap cmap;
109 Window win;
110 Pixmap buf;
111 XIM xim;
112 XIC xic;
113 int scr;
114 int w; /* window width */
115 int h; /* window height */
116 int bufw; /* pixmap width */
117 int bufh; /* pixmap height */
118 int ch; /* char height */
119 int cw; /* char width */
120 int focus;
121 int vis; /* is 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 y = term.c.y;
631 if(term.c.y == term.bot)
632 tscrollup(term.top, 1);
633 else
634 y++;
635 tmoveto(0, y);
636 }
637
638 void
639 csiparse(void) {
640 /* int noarg = 1; */
641 char *p = escseq.buf;
642
643 escseq.narg = 0;
644 if(*p == '?')
645 escseq.priv = 1, p++;
646
647 while(p < escseq.buf+escseq.len) {
648 while(isdigit(*p)) {
649 escseq.arg[escseq.narg] *= 10;
650 escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
651 }
652 if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
653 escseq.narg++, p++;
654 else {
655 escseq.mode = *p;
656 escseq.narg++;
657 return;
658 }
659 }
660 }
661
662 void
663 tmoveto(int x, int y) {
664 LIMIT(x, 0, term.col-1);
665 LIMIT(y, 0, term.row-1);
666 term.c.state &= ~CURSOR_WRAPNEXT;
667 term.c.x = x;
668 term.c.y = y;
669 }
670
671 void
672 tsetchar(char c) {
673 term.line[term.c.y][term.c.x] = term.c.attr;
674 term.line[term.c.y][term.c.x].c = c;
675 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
676 }
677
678 void
679 tclearregion(int x1, int y1, int x2, int y2) {
680 int y, temp;
681
682 if(x1 > x2)
683 temp = x1, x1 = x2, x2 = temp;
684 if(y1 > y2)
685 temp = y1, y1 = y2, y2 = temp;
686
687 LIMIT(x1, 0, term.col-1);
688 LIMIT(x2, 0, term.col-1);
689 LIMIT(y1, 0, term.row-1);
690 LIMIT(y2, 0, term.row-1);
691
692 for(y = y1; y <= y2; y++)
693 memset(&term.line[y][x1], 0, sizeof(Glyph)*(x2-x1+1));
694 }
695
696 void
697 tdeletechar(int n) {
698 int src = term.c.x + n;
699 int dst = term.c.x;
700 int size = term.col - src;
701
702 if(src >= term.col) {
703 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
704 return;
705 }
706 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
707 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
708 }
709
710 void
711 tinsertblank(int n) {
712 int src = term.c.x;
713 int dst = src + n;
714 int size = term.col - dst;
715
716 if(dst >= term.col) {
717 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
718 return;
719 }
720 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
721 tclearregion(src, term.c.y, dst - 1, term.c.y);
722 }
723
724 void
725 tinsertblankline(int n) {
726 if(term.c.y < term.top || term.c.y > term.bot)
727 return;
728
729 tscrolldown(term.c.y, n);
730 }
731
732 void
733 tdeleteline(int n) {
734 if(term.c.y < term.top || term.c.y > term.bot)
735 return;
736
737 tscrollup(term.c.y, n);
738 }
739
740 void
741 tsetattr(int *attr, int l) {
742 int i;
743
744 for(i = 0; i < l; i++) {
745 switch(attr[i]) {
746 case 0:
747 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
748 term.c.attr.fg = DefaultFG;
749 term.c.attr.bg = DefaultBG;
750 break;
751 case 1:
752 term.c.attr.mode |= ATTR_BOLD;
753 break;
754 case 4:
755 term.c.attr.mode |= ATTR_UNDERLINE;
756 break;
757 case 7:
758 term.c.attr.mode |= ATTR_REVERSE;
759 break;
760 case 22:
761 term.c.attr.mode &= ~ATTR_BOLD;
762 break;
763 case 24:
764 term.c.attr.mode &= ~ATTR_UNDERLINE;
765 break;
766 case 27:
767 term.c.attr.mode &= ~ATTR_REVERSE;
768 break;
769 case 38:
770 if (i + 2 < l && attr[i + 1] == 5) {
771 i += 2;
772 if (BETWEEN(attr[i], 0, 255))
773 term.c.attr.fg = attr[i];
774 else
775 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
776 }
777 else
778 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
779 break;
780 case 39:
781 term.c.attr.fg = DefaultFG;
782 break;
783 case 48:
784 if (i + 2 < l && attr[i + 1] == 5) {
785 i += 2;
786 if (BETWEEN(attr[i], 0, 255))
787 term.c.attr.bg = attr[i];
788 else
789 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
790 }
791 else
792 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
793 break;
794 case 49:
795 term.c.attr.bg = DefaultBG;
796 break;
797 default:
798 if(BETWEEN(attr[i], 30, 37))
799 term.c.attr.fg = attr[i] - 30;
800 else if(BETWEEN(attr[i], 40, 47))
801 term.c.attr.bg = attr[i] - 40;
802 else if(BETWEEN(attr[i], 90, 97))
803 term.c.attr.fg = attr[i] - 90 + 8;
804 else if(BETWEEN(attr[i], 100, 107))
805 term.c.attr.fg = attr[i] - 100 + 8;
806 else
807 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]), csidump();
808
809 break;
810 }
811 }
812 }
813
814 void
815 tsetscroll(int t, int b) {
816 int temp;
817
818 LIMIT(t, 0, term.row-1);
819 LIMIT(b, 0, term.row-1);
820 if(t > b) {
821 temp = t;
822 t = b;
823 b = temp;
824 }
825 term.top = t;
826 term.bot = b;
827 }
828
829 void
830 csihandle(void) {
831 switch(escseq.mode) {
832 default:
833 unknown:
834 printf("erresc: unknown csi ");
835 csidump();
836 /* die(""); */
837 break;
838 case '@': /* ICH -- Insert <n> blank char */
839 DEFAULT(escseq.arg[0], 1);
840 tinsertblank(escseq.arg[0]);
841 break;
842 case 'A': /* CUU -- Cursor <n> Up */
843 case 'e':
844 DEFAULT(escseq.arg[0], 1);
845 tmoveto(term.c.x, term.c.y-escseq.arg[0]);
846 break;
847 case 'B': /* CUD -- Cursor <n> Down */
848 DEFAULT(escseq.arg[0], 1);
849 tmoveto(term.c.x, term.c.y+escseq.arg[0]);
850 break;
851 case 'C': /* CUF -- Cursor <n> Forward */
852 case 'a':
853 DEFAULT(escseq.arg[0], 1);
854 tmoveto(term.c.x+escseq.arg[0], term.c.y);
855 break;
856 case 'D': /* CUB -- Cursor <n> Backward */
857 DEFAULT(escseq.arg[0], 1);
858 tmoveto(term.c.x-escseq.arg[0], term.c.y);
859 break;
860 case 'E': /* CNL -- Cursor <n> Down and first col */
861 DEFAULT(escseq.arg[0], 1);
862 tmoveto(0, term.c.y+escseq.arg[0]);
863 break;
864 case 'F': /* CPL -- Cursor <n> Up and first col */
865 DEFAULT(escseq.arg[0], 1);
866 tmoveto(0, term.c.y-escseq.arg[0]);
867 break;
868 case 'G': /* CHA -- Move to <col> */
869 case '`': /* XXX: HPA -- same? */
870 DEFAULT(escseq.arg[0], 1);
871 tmoveto(escseq.arg[0]-1, term.c.y);
872 break;
873 case 'H': /* CUP -- Move to <row> <col> */
874 case 'f': /* XXX: HVP -- same? */
875 DEFAULT(escseq.arg[0], 1);
876 DEFAULT(escseq.arg[1], 1);
877 tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
878 break;
879 /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
880 case 'J': /* ED -- Clear screen */
881 switch(escseq.arg[0]) {
882 case 0: /* below */
883 tclearregion(term.c.x, term.c.y, term.col-1, term.row-1);
884 break;
885 case 1: /* above */
886 tclearregion(0, 0, term.c.x, term.c.y);
887 break;
888 case 2: /* all */
889 tclearregion(0, 0, term.col-1, term.row-1);
890 break;
891 default:
892 goto unknown;
893 }
894 break;
895 case 'K': /* EL -- Clear line */
896 switch(escseq.arg[0]) {
897 case 0: /* right */
898 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
899 break;
900 case 1: /* left */
901 tclearregion(0, term.c.y, term.c.x, term.c.y);
902 break;
903 case 2: /* all */
904 tclearregion(0, term.c.y, term.col-1, term.c.y);
905 break;
906 }
907 break;
908 case 'S': /* SU -- Scroll <n> line up */
909 DEFAULT(escseq.arg[0], 1);
910 tscrollup(term.top, escseq.arg[0]);
911 break;
912 case 'T': /* SD -- Scroll <n> line down */
913 DEFAULT(escseq.arg[0], 1);
914 tscrolldown(term.top, escseq.arg[0]);
915 break;
916 case 'L': /* IL -- Insert <n> blank lines */
917 DEFAULT(escseq.arg[0], 1);
918 tinsertblankline(escseq.arg[0]);
919 break;
920 case 'l': /* RM -- Reset Mode */
921 if(escseq.priv) {
922 switch(escseq.arg[0]) {
923 case 1:
924 term.mode &= ~MODE_APPKEYPAD;
925 break;
926 case 5: /* TODO: DECSCNM -- Remove reverse video */
927 break;
928 case 7:
929 term.mode &= ~MODE_WRAP;
930 break;
931 case 12: /* att610 -- Stop blinking cursor (IGNORED) */
932 break;
933 case 25:
934 term.c.state |= CURSOR_HIDE;
935 break;
936 case 1049: /* = 1047 and 1048 */
937 case 1047:
938 if(IS_SET(MODE_ALTSCREEN)) {
939 tclearregion(0, 0, term.col-1, term.row-1);
940 tswapscreen();
941 }
942 if(escseq.arg[0] == 1047)
943 break;
944 case 1048:
945 tcursor(CURSOR_LOAD);
946 break;
947 default:
948 goto unknown;
949 }
950 } else {
951 switch(escseq.arg[0]) {
952 case 4:
953 term.mode &= ~MODE_INSERT;
954 break;
955 default:
956 goto unknown;
957 }
958 }
959 break;
960 case 'M': /* DL -- Delete <n> lines */
961 DEFAULT(escseq.arg[0], 1);
962 tdeleteline(escseq.arg[0]);
963 break;
964 case 'X': /* ECH -- Erase <n> char */
965 DEFAULT(escseq.arg[0], 1);
966 tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
967 break;
968 case 'P': /* DCH -- Delete <n> char */
969 DEFAULT(escseq.arg[0], 1);
970 tdeletechar(escseq.arg[0]);
971 break;
972 /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
973 case 'd': /* VPA -- Move to <row> */
974 DEFAULT(escseq.arg[0], 1);
975 tmoveto(term.c.x, escseq.arg[0]-1);
976 break;
977 case 'h': /* SM -- Set terminal mode */
978 if(escseq.priv) {
979 switch(escseq.arg[0]) {
980 case 1:
981 term.mode |= MODE_APPKEYPAD;
982 break;
983 case 5: /* DECSCNM -- Reverve video */
984 /* TODO: set REVERSE on the whole screen (f) */
985 break;
986 case 7:
987 term.mode |= MODE_WRAP;
988 break;
989 case 12: /* att610 -- Start blinking cursor (IGNORED) */
990 /* fallthrough for xterm cvvis = CSI [ ? 12 ; 25 h */
991 if(escseq.narg > 1 && escseq.arg[1] != 25)
992 break;
993 case 25:
994 term.c.state &= ~CURSOR_HIDE;
995 break;
996 case 1049: /* = 1047 and 1048 */
997 case 1047:
998 if(IS_SET(MODE_ALTSCREEN))
999 tclearregion(0, 0, term.col-1, term.row-1);
1000 else
1001 tswapscreen();
1002 if(escseq.arg[0] == 1047)
1003 break;
1004 case 1048:
1005 tcursor(CURSOR_SAVE);
1006 break;
1007 default: goto unknown;
1008 }
1009 } else {
1010 switch(escseq.arg[0]) {
1011 case 4:
1012 term.mode |= MODE_INSERT;
1013 break;
1014 default: goto unknown;
1015 }
1016 };
1017 break;
1018 case 'm': /* SGR -- Terminal attribute (color) */
1019 tsetattr(escseq.arg, escseq.narg);
1020 break;
1021 case 'r': /* DECSTBM -- Set Scrolling Region */
1022 if(escseq.priv)
1023 goto unknown;
1024 else {
1025 DEFAULT(escseq.arg[0], 1);
1026 DEFAULT(escseq.arg[1], term.row);
1027 tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
1028 tmoveto(0, 0);
1029 }
1030 break;
1031 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1032 tcursor(CURSOR_SAVE);
1033 break;
1034 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1035 tcursor(CURSOR_LOAD);
1036 break;
1037 }
1038 }
1039
1040 void
1041 csidump(void) {
1042 int i;
1043 printf("ESC [ %s", escseq.priv ? "? " : "");
1044 if(escseq.narg)
1045 for(i = 0; i < escseq.narg; i++)
1046 printf("%d ", escseq.arg[i]);
1047 if(escseq.mode)
1048 putchar(escseq.mode);
1049 putchar('\n');
1050 }
1051
1052 void
1053 csireset(void) {
1054 memset(&escseq, 0, sizeof(escseq));
1055 }
1056
1057 void
1058 tputtab(void) {
1059 int space = TAB - term.c.x % TAB;
1060 tmoveto(term.c.x + space, term.c.y);
1061 }
1062
1063 void
1064 tputc(char c) {
1065 if(term.esc & ESC_START) {
1066 if(term.esc & ESC_CSI) {
1067 escseq.buf[escseq.len++] = c;
1068 if(BETWEEN(c, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
1069 term.esc = 0;
1070 csiparse(), csihandle();
1071 }
1072 /* TODO: handle other OSC */
1073 } else if(term.esc & ESC_OSC) {
1074 if(c == ';') {
1075 term.titlelen = 0;
1076 term.esc = ESC_START | ESC_TITLE;
1077 }
1078 } else if(term.esc & ESC_TITLE) {
1079 if(c == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
1080 term.esc = 0;
1081 term.title[term.titlelen] = '\0';
1082 XStoreName(xw.dis, xw.win, term.title);
1083 } else {
1084 term.title[term.titlelen++] = c;
1085 }
1086 } else if(term.esc & ESC_ALTCHARSET) {
1087 switch(c) {
1088 case '0': /* Line drawing crap */
1089 term.c.attr.mode |= ATTR_GFX;
1090 break;
1091 case 'B': /* Back to regular text */
1092 term.c.attr.mode &= ~ATTR_GFX;
1093 break;
1094 default:
1095 printf("esc unhandled charset: ESC ( %c\n", c);
1096 }
1097 term.esc = 0;
1098 } else {
1099 switch(c) {
1100 case '[':
1101 term.esc |= ESC_CSI;
1102 break;
1103 case ']':
1104 term.esc |= ESC_OSC;
1105 break;
1106 case '(':
1107 term.esc |= ESC_ALTCHARSET;
1108 break;
1109 case 'D': /* IND -- Linefeed */
1110 if(term.c.y == term.bot)
1111 tscrollup(term.top, 1);
1112 else
1113 tmoveto(term.c.x, term.c.y+1);
1114 term.esc = 0;
1115 break;
1116 case 'E': /* NEL -- Next line */
1117 tnewline();
1118 term.esc = 0;
1119 break;
1120 case 'M': /* RI -- Reverse index */
1121 if(term.c.y == term.top)
1122 tscrolldown(term.top, 1);
1123 else
1124 tmoveto(term.c.x, term.c.y-1);
1125 term.esc = 0;
1126 break;
1127 case 'c': /* RIS -- Reset to inital state */
1128 treset();
1129 term.esc = 0;
1130 break;
1131 case '=': /* DECPAM -- Application keypad */
1132 term.mode |= MODE_APPKEYPAD;
1133 term.esc = 0;
1134 break;
1135 case '>': /* DECPNM -- Normal keypad */
1136 term.mode &= ~MODE_APPKEYPAD;
1137 term.esc = 0;
1138 break;
1139 case '7': /* DECSC -- Save Cursor */
1140 tcursor(CURSOR_SAVE);
1141 term.esc = 0;
1142 break;
1143 case '8': /* DECRC -- Restore Cursor */
1144 tcursor(CURSOR_LOAD);
1145 term.esc = 0;
1146 break;
1147 default:
1148 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n", c, isprint(c)?c:'.');
1149 term.esc = 0;
1150 }
1151 }
1152 } else {
1153 switch(c) {
1154 case '\t':
1155 tputtab();
1156 break;
1157 case '\b':
1158 tmoveto(term.c.x-1, term.c.y);
1159 break;
1160 case '\r':
1161 tmoveto(0, term.c.y);
1162 break;
1163 case '\n':
1164 tnewline();
1165 break;
1166 case '\a':
1167 if(!xw.focus)
1168 xseturgency(1);
1169 break;
1170 case '\033':
1171 csireset();
1172 term.esc = ESC_START;
1173 break;
1174 default:
1175 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1176 tnewline();
1177 tsetchar(c);
1178 if(term.c.x+1 < term.col)
1179 tmoveto(term.c.x+1, term.c.y);
1180 else
1181 term.c.state |= CURSOR_WRAPNEXT;
1182 break;
1183 }
1184 }
1185 }
1186
1187 void
1188 tputs(char *s, int len) {
1189 for(; len > 0; len--)
1190 tputc(*s++);
1191 }
1192
1193 void
1194 tresize(int col, int row) {
1195 int i;
1196 int minrow = MIN(row, term.row);
1197 int mincol = MIN(col, term.col);
1198 int slide = term.c.y - row + 1;
1199
1200 if(col < 1 || row < 1)
1201 return;
1202
1203 /* free unneeded rows */
1204 i = 0;
1205 if(slide > 0) {
1206 /* slide screen to keep cursor where we expect it -
1207 * tscrollup would work here, but we can optimize to
1208 * memmove because we're freeing the earlier lines */
1209 for(/* i = 0 */; i < slide; i++) {
1210 free(term.line[i]);
1211 free(term.alt[i]);
1212 }
1213 memmove(term.line, term.line + slide, row * sizeof(Line));
1214 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1215 }
1216 for(i += row; i < term.row; i++) {
1217 free(term.line[i]);
1218 free(term.alt[i]);
1219 }
1220
1221 /* resize to new height */
1222 term.line = realloc(term.line, row * sizeof(Line));
1223 term.alt = realloc(term.alt, row * sizeof(Line));
1224
1225 /* resize each row to new width, zero-pad if needed */
1226 for(i = 0; i < minrow; i++) {
1227 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
1228 term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
1229 memset(term.line[i] + mincol, 0, (col - mincol) * sizeof(Glyph));
1230 memset(term.alt[i] + mincol, 0, (col - mincol) * sizeof(Glyph));
1231 }
1232
1233 /* allocate any new rows */
1234 for(/* i == minrow */; i < row; i++) {
1235 term.line[i] = calloc(col, sizeof(Glyph));
1236 term.alt [i] = calloc(col, sizeof(Glyph));
1237 }
1238
1239 /* update terminal size */
1240 term.col = col, term.row = row;
1241 /* make use of the LIMIT in tmoveto */
1242 tmoveto(term.c.x, term.c.y);
1243 /* reset scrolling region */
1244 tsetscroll(0, row-1);
1245 }
1246
1247 void
1248 xloadcols(void) {
1249 int i, r, g, b;
1250 XColor color;
1251 unsigned long white = WhitePixel(xw.dis, xw.scr);
1252
1253 for(i = 0; i < 16; i++) {
1254 if (!XAllocNamedColor(xw.dis, xw.cmap, colorname[i], &color, &color)) {
1255 dc.col[i] = white;
1256 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1257 } else
1258 dc.col[i] = color.pixel;
1259 }
1260
1261 /* same colors as xterm */
1262 for(r = 0; r < 6; r++)
1263 for(g = 0; g < 6; g++)
1264 for(b = 0; b < 6; b++) {
1265 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1266 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1267 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1268 if (!XAllocColor(xw.dis, xw.cmap, &color)) {
1269 dc.col[i] = white;
1270 fprintf(stderr, "Could not allocate color %d\n", i);
1271 } else
1272 dc.col[i] = color.pixel;
1273 i++;
1274 }
1275
1276 for(r = 0; r < 24; r++, i++) {
1277 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1278 if (!XAllocColor(xw.dis, xw.cmap, &color)) {
1279 dc.col[i] = white;
1280 fprintf(stderr, "Could not allocate color %d\n", i);
1281 } else
1282 dc.col[i] = color.pixel;
1283 }
1284 }
1285
1286 void
1287 xclear(int x1, int y1, int x2, int y2) {
1288 XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
1289 XFillRectangle(xw.dis, xw.buf, dc.gc,
1290 x1 * xw.cw, y1 * xw.ch,
1291 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1292 }
1293
1294 void
1295 xhints(void)
1296 {
1297 XClassHint class = {TNAME, TNAME};
1298 XWMHints wm = {.flags = InputHint, .input = 1};
1299 XSizeHints size = {
1300 .flags = PSize | PResizeInc | PBaseSize,
1301 .height = xw.h,
1302 .width = xw.w,
1303 .height_inc = xw.ch,
1304 .width_inc = xw.cw,
1305 .base_height = 2*BORDER,
1306 .base_width = 2*BORDER,
1307 };
1308 XSetWMProperties(xw.dis, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1309 }
1310
1311 void
1312 xinit(void) {
1313 XSetWindowAttributes attrs;
1314
1315 if(!(xw.dis = XOpenDisplay(NULL)))
1316 die("Can't open display\n");
1317 xw.scr = XDefaultScreen(xw.dis);
1318
1319 /* font */
1320 if(!(dc.font = XLoadQueryFont(xw.dis, FONT)) || !(dc.bfont = XLoadQueryFont(xw.dis, BOLDFONT)))
1321 die("Can't load font %s\n", dc.font ? BOLDFONT : FONT);
1322
1323 /* XXX: Assuming same size for bold font */
1324 xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing;
1325 xw.ch = dc.font->ascent + dc.font->descent;
1326
1327 /* colors */
1328 xw.cmap = XDefaultColormap(xw.dis, xw.scr);
1329 xloadcols();
1330
1331 /* window - default size */
1332 xw.bufh = 24 * xw.ch;
1333 xw.bufw = 80 * xw.cw;
1334 xw.h = xw.bufh + 2*BORDER;
1335 xw.w = xw.bufw + 2*BORDER;
1336
1337 attrs.background_pixel = dc.col[DefaultBG];
1338 attrs.border_pixel = dc.col[DefaultBG];
1339 attrs.bit_gravity = NorthWestGravity;
1340 attrs.event_mask = FocusChangeMask | KeyPressMask
1341 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1342 | PointerMotionMask | ButtonPressMask | ButtonReleaseMask;
1343 attrs.colormap = xw.cmap;
1344
1345 xw.win = XCreateWindow(xw.dis, XRootWindow(xw.dis, xw.scr), 0, 0,
1346 xw.w, xw.h, 0, XDefaultDepth(xw.dis, xw.scr), InputOutput,
1347 XDefaultVisual(xw.dis, xw.scr),
1348 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
1349 | CWColormap,
1350 &attrs);
1351 xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1352
1353
1354 /* input methods */
1355 xw.xim = XOpenIM(xw.dis, NULL, NULL, NULL);
1356 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
1357 | XIMStatusNothing, XNClientWindow, xw.win,
1358 XNFocusWindow, xw.win, NULL);
1359 /* gc */
1360 dc.gc = XCreateGC(xw.dis, xw.win, 0, NULL);
1361
1362 XMapWindow(xw.dis, xw.win);
1363 xhints();
1364 XStoreName(xw.dis, xw.win, opt_title ? opt_title : "st");
1365 XSync(xw.dis, 0);
1366 }
1367
1368 void
1369 xdraws(char *s, Glyph base, int x, int y, int len) {
1370 unsigned long xfg, xbg;
1371 int winx = x*xw.cw, winy = y*xw.ch + dc.font->ascent, width = len*xw.cw;
1372 int i;
1373
1374 if(base.mode & ATTR_REVERSE)
1375 xfg = dc.col[base.bg], xbg = dc.col[base.fg];
1376 else
1377 xfg = dc.col[base.fg], xbg = dc.col[base.bg];
1378
1379 XSetBackground(xw.dis, dc.gc, xbg);
1380 XSetForeground(xw.dis, dc.gc, xfg);
1381
1382 if(base.mode & ATTR_GFX)
1383 for(i = 0; i < len; i++) {
1384 char c = gfx[(unsigned int)s[i] % 256];
1385 if(c)
1386 s[i] = c;
1387 else if(s[i] > 0x5f)
1388 s[i] -= 0x5f;
1389 }
1390
1391 XSetFont(xw.dis, dc.gc, base.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1392 XDrawImageString(xw.dis, xw.buf, dc.gc, winx, winy, s, len);
1393
1394 if(base.mode & ATTR_UNDERLINE)
1395 XDrawLine(xw.dis, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1396 }
1397
1398 void
1399 xdrawcursor(void) {
1400 static int oldx = 0;
1401 static int oldy = 0;
1402 Glyph g = {' ', ATTR_NULL, DefaultBG, DefaultCS, 0};
1403
1404 LIMIT(oldx, 0, term.col-1);
1405 LIMIT(oldy, 0, term.row-1);
1406
1407 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
1408 g.c = term.line[term.c.y][term.c.x].c;
1409
1410 /* remove the old cursor */
1411 if(term.line[oldy][oldx].state & GLYPH_SET)
1412 xdraws(&term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1);
1413 else
1414 xclear(oldx, oldy, oldx, oldy);
1415
1416 /* draw the new one */
1417 if(!(term.c.state & CURSOR_HIDE) && xw.focus) {
1418 xdraws(&g.c, g, term.c.x, term.c.y, 1);
1419 oldx = term.c.x, oldy = term.c.y;
1420 }
1421 }
1422
1423 #ifdef DEBUG
1424 /* basic drawing routines */
1425 void
1426 xdrawc(int x, int y, Glyph g) {
1427 XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
1428 XSetBackground(xw.dis, dc.gc, dc.col[g.bg]);
1429 XSetForeground(xw.dis, dc.gc, dc.col[g.fg]);
1430 XSetFont(xw.dis, dc.gc, g.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
1431 XDrawImageString(xw.dis, xw.buf, dc.gc, r.x, r.y+dc.font->ascent, &g.c, 1);
1432 }
1433
1434 void
1435 draw(int dummy) {
1436 int x, y;
1437
1438 xclear(0, 0, term.col-1, term.row-1);
1439 for(y = 0; y < term.row; y++)
1440 for(x = 0; x < term.col; x++)
1441 if(term.line[y][x].state & GLYPH_SET)
1442 xdrawc(x, y, term.line[y][x]);
1443
1444 xdrawcursor();
1445 XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1446 XFlush(xw.dis);
1447 }
1448
1449 #else
1450 /* optimized drawing routine */
1451 void
1452 draw(int redraw_all) {
1453 int i, x, y, ox;
1454 Glyph base, new;
1455 char buf[DRAW_BUF_SIZ];
1456
1457 if(!xw.vis)
1458 return;
1459
1460 xclear(0, 0, term.col-1, term.row-1);
1461 for(y = 0; y < term.row; y++) {
1462 base = term.line[y][0];
1463 i = ox = 0;
1464 for(x = 0; x < term.col; x++) {
1465 new = term.line[y][x];
1466 if(sel.bx!=-1 && new.c && selected(x, y))
1467 new.mode ^= ATTR_REVERSE;
1468 if(i > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
1469 i >= DRAW_BUF_SIZ)) {
1470 xdraws(buf, base, ox, y, i);
1471 i = 0;
1472 }
1473 if(new.state & GLYPH_SET) {
1474 if(i == 0) {
1475 ox = x;
1476 base = new;
1477 }
1478 buf[i++] = new.c;
1479 }
1480 }
1481 if(i > 0)
1482 xdraws(buf, base, ox, y, i);
1483 }
1484 xdrawcursor();
1485 XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1486 XFlush(xw.dis);
1487 }
1488
1489 #endif
1490
1491 void
1492 expose(XEvent *ev) {
1493 draw(SCREEN_REDRAW);
1494 }
1495
1496 void
1497 visibility(XEvent *ev) {
1498 XVisibilityEvent *e = &ev->xvisibility;
1499 /* XXX if this goes from 0 to 1, need a full redraw for next Expose,
1500 * not just a buf copy */
1501 xw.vis = e->state != VisibilityFullyObscured;
1502 }
1503
1504 void
1505 unmap(XEvent *ev) {
1506 xw.vis = 0;
1507 }
1508
1509 void
1510 xseturgency(int add) {
1511 XWMHints *h = XGetWMHints(xw.dis, xw.win);
1512 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
1513 XSetWMHints(xw.dis, xw.win, h);
1514 XFree(h);
1515 }
1516
1517 void
1518 focus(XEvent *ev) {
1519 if((xw.focus = ev->type == FocusIn))
1520 xseturgency(0);
1521 draw(SCREEN_UPDATE);
1522 }
1523
1524 char*
1525 kmap(KeySym k) {
1526 int i;
1527 for(i = 0; i < LEN(key); i++)
1528 if(key[i].k == k)
1529 return (char*)key[i].s;
1530 return NULL;
1531 }
1532
1533 void
1534 kpress(XEvent *ev) {
1535 XKeyEvent *e = &ev->xkey;
1536 KeySym ksym;
1537 char buf[32];
1538 char *customkey;
1539 int len;
1540 int meta;
1541 int shift;
1542 Status status;
1543
1544 meta = e->state & Mod1Mask;
1545 shift = e->state & ShiftMask;
1546 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
1547
1548 if((customkey = kmap(ksym)))
1549 ttywrite(customkey, strlen(customkey));
1550 else if(len > 0) {
1551 buf[sizeof(buf)-1] = '\0';
1552 if(meta && len == 1)
1553 ttywrite("\033", 1);
1554 ttywrite(buf, len);
1555 } else
1556 switch(ksym) {
1557 case XK_Up:
1558 case XK_Down:
1559 case XK_Left:
1560 case XK_Right:
1561 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', "DACB"[ksym - XK_Left]);
1562 ttywrite(buf, 3);
1563 break;
1564 case XK_Insert:
1565 if(shift)
1566 selpaste(), draw(1);
1567 break;
1568 default:
1569 fprintf(stderr, "errkey: %d\n", (int)ksym);
1570 break;
1571 }
1572 }
1573
1574 void
1575 resize(XEvent *e) {
1576 int col, row;
1577
1578 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
1579 return;
1580
1581 xw.w = e->xconfigure.width;
1582 xw.h = e->xconfigure.height;
1583 xw.bufw = xw.w - 2*BORDER;
1584 xw.bufh = xw.h - 2*BORDER;
1585 col = xw.bufw / xw.cw;
1586 row = xw.bufh / xw.ch;
1587 tresize(col, row);
1588 ttyresize(col, row);
1589 xw.bufh = MAX(1, xw.bufh);
1590 xw.bufw = MAX(1, xw.bufw);
1591 XFreePixmap(xw.dis, xw.buf);
1592 xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
1593 }
1594
1595 void
1596 run(void) {
1597 XEvent ev;
1598 fd_set rfd;
1599 int xfd = XConnectionNumber(xw.dis);
1600
1601 for(;;) {
1602 FD_ZERO(&rfd);
1603 FD_SET(cmdfd, &rfd);
1604 FD_SET(xfd, &rfd);
1605 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) < 0) {
1606 if(errno == EINTR)
1607 continue;
1608 die("select failed: %s\n", SERRNO);
1609 }
1610 if(FD_ISSET(cmdfd, &rfd)) {
1611 ttyread();
1612 draw(SCREEN_UPDATE);
1613 }
1614 while(XPending(xw.dis)) {
1615 XNextEvent(xw.dis, &ev);
1616 if (XFilterEvent(&ev, xw.win))
1617 continue;
1618 if(handler[ev.type])
1619 (handler[ev.type])(&ev);
1620 }
1621 }
1622 }
1623
1624 int
1625 main(int argc, char *argv[]) {
1626 int i;
1627
1628 for(i = 1; i < argc; i++) {
1629 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
1630 case 't':
1631 if(++i < argc) opt_title = argv[i];
1632 break;
1633 case 'e':
1634 if(++i < argc) opt_cmd = argv[i];
1635 break;
1636 case 'v':
1637 default:
1638 die(USAGE);
1639 }
1640 }
1641 setlocale(LC_CTYPE, "");
1642 tnew(80, 24);
1643 ttynew();
1644 xinit();
1645 selinit();
1646 run();
1647 return 0;
1648 }