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support for x11 xterm mouse reporting
[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/Xatom.h>
20 #include <X11/Xlib.h>
21 #include <X11/Xutil.h>
22 #include <X11/cursorfont.h>
23 #include <X11/keysym.h>
24
25 #include <sys/time.h>
26 #include <time.h>
27
28 #if defined(__linux)
29 #include <pty.h>
30 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
31 #include <util.h>
32 #elif defined(__FreeBSD__) || defined(__DragonFly__)
33 #include <libutil.h>
34 #endif
35
36 #define USAGE \
37 "st-" VERSION ", (c) 2010 st engineers\n" \
38 "usage: st [-t title] [-c class] [-v] [-e cmd]\n"
39
40 /* Arbitrary sizes */
41 #define ESC_TITLE_SIZ 256
42 #define ESC_BUF_SIZ 256
43 #define ESC_ARG_SIZ 16
44 #define DRAW_BUF_SIZ 1024
45 #define UTF_SIZ 4
46
47 #define SERRNO strerror(errno)
48 #define MIN(a, b) ((a) < (b) ? (a) : (b))
49 #define MAX(a, b) ((a) < (b) ? (b) : (a))
50 #define LEN(a) (sizeof(a) / sizeof(a[0]))
51 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
52 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
53 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
54 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
55 #define IS_SET(flag) (term.mode & (flag))
56 #define TIMEDIFFERENCE(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
57
58 /* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
59 enum { ATTR_NULL=0 , ATTR_REVERSE=1 , ATTR_UNDERLINE=2, ATTR_BOLD=4, ATTR_GFX=8 };
60 enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT,
61 CURSOR_SAVE, CURSOR_LOAD };
62 enum { CURSOR_DEFAULT = 0, CURSOR_HIDE = 1, CURSOR_WRAPNEXT = 2 };
63 enum { GLYPH_SET=1, GLYPH_DIRTY=2 };
64 enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4, MODE_ALTSCREEN=8,
65 MODE_CRLF=16, MODE_MOUSE=32 };
66 enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
67 enum { WIN_VISIBLE=1, WIN_REDRAW=2, WIN_FOCUSED=4 };
68
69 #undef B0
70 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
71
72 typedef struct {
73 char c[UTF_SIZ]; /* character code */
74 char mode; /* attribute flags */
75 int fg; /* foreground */
76 int bg; /* background */
77 char state; /* state flags */
78 } Glyph;
79
80 typedef Glyph* Line;
81
82 typedef struct {
83 Glyph attr; /* current char attributes */
84 int x;
85 int y;
86 char state;
87 } TCursor;
88
89 /* CSI Escape sequence structs */
90 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
91 typedef struct {
92 char buf[ESC_BUF_SIZ]; /* raw string */
93 int len; /* raw string length */
94 char priv;
95 int arg[ESC_ARG_SIZ];
96 int narg; /* nb of args */
97 char mode;
98 } CSIEscape;
99
100 /* Internal representation of the screen */
101 typedef struct {
102 int row; /* nb row */
103 int col; /* nb col */
104 Line* line; /* screen */
105 Line* alt; /* alternate screen */
106 TCursor c; /* cursor */
107 int top; /* top scroll limit */
108 int bot; /* bottom scroll limit */
109 int mode; /* terminal mode flags */
110 int esc; /* escape state flags */
111 char title[ESC_TITLE_SIZ];
112 int titlelen;
113 } Term;
114
115 /* Purely graphic info */
116 typedef struct {
117 Display* dpy;
118 Colormap cmap;
119 Window win;
120 Pixmap buf;
121 XIM xim;
122 XIC xic;
123 int scr;
124 int w; /* window width */
125 int h; /* window height */
126 int bufw; /* pixmap width */
127 int bufh; /* pixmap height */
128 int ch; /* char height */
129 int cw; /* char width */
130 char state; /* focus, redraw, visible */
131 } XWindow;
132
133 typedef struct {
134 KeySym k;
135 unsigned int mask;
136 char s[ESC_BUF_SIZ];
137 } Key;
138
139 /* Drawing Context */
140 typedef struct {
141 unsigned long col[256];
142 GC gc;
143 struct {
144 int ascent;
145 int descent;
146 short lbearing;
147 short rbearing;
148 XFontSet set;
149 } font, bfont;
150 } DC;
151
152 /* TODO: use better name for vars... */
153 typedef struct {
154 int mode;
155 int bx, by;
156 int ex, ey;
157 struct {int x, y;} b, e;
158 char *clip;
159 Atom xtarget;
160 struct timeval tclick1;
161 struct timeval tclick2;
162 } Selection;
163
164 #include "config.h"
165
166 static void die(const char*, ...);
167 static void draw(void);
168 static void drawregion(int, int, int, int);
169 static void execsh(void);
170 static void sigchld(int);
171 static void run(void);
172
173 static void csidump(void);
174 static void csihandle(void);
175 static void csiparse(void);
176 static void csireset(void);
177
178 static void tclearregion(int, int, int, int);
179 static void tcursor(int);
180 static void tdeletechar(int);
181 static void tdeleteline(int);
182 static void tinsertblank(int);
183 static void tinsertblankline(int);
184 static void tmoveto(int, int);
185 static void tnew(int, int);
186 static void tnewline(int);
187 static void tputtab(void);
188 static void tputc(char*);
189 static void treset(void);
190 static int tresize(int, int);
191 static void tscrollup(int, int);
192 static void tscrolldown(int, int);
193 static void tsetattr(int*, int);
194 static void tsetchar(char*);
195 static void tsetscroll(int, int);
196 static void tswapscreen(void);
197
198 static void ttynew(void);
199 static void ttyread(void);
200 static void ttyresize(int, int);
201 static void ttywrite(const char *, size_t);
202
203 static void xdraws(char *, Glyph, int, int, int, int);
204 static void xhints(void);
205 static void xclear(int, int, int, int);
206 static void xdrawcursor(void);
207 static void xinit(void);
208 static void xloadcols(void);
209 static void xseturgency(int);
210 static void xsetsel(char*);
211 static void xresize(int, int);
212
213 static void expose(XEvent *);
214 static void visibility(XEvent *);
215 static void unmap(XEvent *);
216 static char* kmap(KeySym, unsigned int state);
217 static void kpress(XEvent *);
218 static void resize(XEvent *);
219 static void focus(XEvent *);
220 static void brelease(XEvent *);
221 static void bpress(XEvent *);
222 static void bmotion(XEvent *);
223 static void selnotify(XEvent *);
224 static void selrequest(XEvent *);
225
226 static void selinit(void);
227 static inline int selected(int, int);
228 static void selcopy(void);
229 static void selpaste();
230
231 static int utf8decode(char *, long *);
232 static int utf8encode(long *, char *);
233 static int utf8size(char *);
234 static int isfullutf8(char *, int);
235
236 static void (*handler[LASTEvent])(XEvent *) = {
237 [KeyPress] = kpress,
238 [ConfigureNotify] = resize,
239 [VisibilityNotify] = visibility,
240 [UnmapNotify] = unmap,
241 [Expose] = expose,
242 [FocusIn] = focus,
243 [FocusOut] = focus,
244 [MotionNotify] = bmotion,
245 [ButtonPress] = bpress,
246 [ButtonRelease] = brelease,
247 [SelectionNotify] = selnotify,
248 [SelectionRequest] = selrequest,
249 };
250
251 /* Globals */
252 static DC dc;
253 static XWindow xw;
254 static Term term;
255 static CSIEscape escseq;
256 static int cmdfd;
257 static pid_t pid;
258 static Selection sel;
259 static char **opt_cmd = NULL;
260 static char *opt_title = NULL;
261 static char *opt_class = NULL;
262
263 int
264 utf8decode(char *s, long *u) {
265 unsigned char c;
266 int i, n, rtn;
267
268 rtn = 1;
269 c = *s;
270 if(~c&B7) { /* 0xxxxxxx */
271 *u = c;
272 return rtn;
273 } else if((c&(B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
274 *u = c&(B4|B3|B2|B1|B0);
275 n = 1;
276 } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
277 *u = c&(B3|B2|B1|B0);
278 n = 2;
279 } else if((c&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
280 *u = c&(B2|B1|B0);
281 n = 3;
282 } else
283 goto invalid;
284 for(i=n,++s; i>0; --i,++rtn,++s) {
285 c = *s;
286 if((c&(B7|B6)) != B7) /* 10xxxxxx */
287 goto invalid;
288 *u <<= 6;
289 *u |= c&(B5|B4|B3|B2|B1|B0);
290 }
291 if((n == 1 && *u < 0x80) ||
292 (n == 2 && *u < 0x800) ||
293 (n == 3 && *u < 0x10000) ||
294 (*u >= 0xD800 && *u <= 0xDFFF))
295 goto invalid;
296 return rtn;
297 invalid:
298 *u = 0xFFFD;
299 return rtn;
300 }
301
302 int
303 utf8encode(long *u, char *s) {
304 unsigned char *sp;
305 unsigned long uc;
306 int i, n;
307
308 sp = (unsigned char*) s;
309 uc = *u;
310 if(uc < 0x80) {
311 *sp = uc; /* 0xxxxxxx */
312 return 1;
313 } else if(*u < 0x800) {
314 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
315 n = 1;
316 } else if(uc < 0x10000) {
317 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
318 n = 2;
319 } else if(uc <= 0x10FFFF) {
320 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
321 n = 3;
322 } else {
323 goto invalid;
324 }
325 for(i=n,++sp; i>0; --i,++sp)
326 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
327 return n+1;
328 invalid:
329 /* U+FFFD */
330 *s++ = '\xEF';
331 *s++ = '\xBF';
332 *s = '\xBD';
333 return 3;
334 }
335
336 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
337 UTF-8 otherwise return 0 */
338 int
339 isfullutf8(char *s, int b) {
340 unsigned char *c1, *c2, *c3;
341
342 c1 = (unsigned char *) s;
343 c2 = (unsigned char *) ++s;
344 c3 = (unsigned char *) ++s;
345 if(b < 1)
346 return 0;
347 else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
348 return 0;
349 else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
350 ((b == 1) ||
351 ((b == 2) && (*c2&(B7|B6)) == B7)))
352 return 0;
353 else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
354 ((b == 1) ||
355 ((b == 2) && (*c2&(B7|B6)) == B7) ||
356 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7)))
357 return 0;
358 else
359 return 1;
360 }
361
362 int
363 utf8size(char *s) {
364 unsigned char c = *s;
365
366 if(~c&B7)
367 return 1;
368 else if((c&(B7|B6|B5)) == (B7|B6))
369 return 2;
370 else if((c&(B7|B6|B5|B4)) == (B7|B6|B5))
371 return 3;
372 else
373 return 4;
374 }
375
376 void
377 selinit(void) {
378 sel.tclick1.tv_sec = 0;
379 sel.tclick1.tv_usec = 0;
380 sel.mode = 0;
381 sel.bx = -1;
382 sel.clip = NULL;
383 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
384 if(sel.xtarget == None)
385 sel.xtarget = XA_STRING;
386 }
387
388 static inline int
389 selected(int x, int y) {
390 if(sel.ey == y && sel.by == y) {
391 int bx = MIN(sel.bx, sel.ex);
392 int ex = MAX(sel.bx, sel.ex);
393 return BETWEEN(x, bx, ex);
394 }
395 return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
396 || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
397 }
398
399 void
400 getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
401 if(b)
402 *b = e->xbutton.button;
403
404 *x = (e->xbutton.x - BORDER)/xw.cw;
405 *y = (e->xbutton.y - BORDER)/xw.ch;
406 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
407 sel.b.y = MIN(sel.by, sel.ey);
408 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
409 sel.e.y = MAX(sel.by, sel.ey);
410 }
411
412 void
413 mousereport(XEvent *e) {
414 int x = (e->xbutton.x - BORDER)/xw.cw;
415 int y = (e->xbutton.y - BORDER)/xw.ch;
416 int button = e->xbutton.button;
417 int state = e->xbutton.state;
418 char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
419
420 if(!IS_SET(MODE_MOUSE))
421 return;
422
423 /* from urxvt */
424 if(e->xbutton.type == ButtonRelease || button == AnyButton)
425 button = 3;
426 else {
427 button -= Button1;
428 if(button >= 3)
429 button += 64 - 3;
430 }
431
432 buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
433 + (state & Mod4Mask ? 8 : 0)
434 + (state & ControlMask ? 16 : 0);
435
436 ttywrite(buf, sizeof(buf));
437 }
438
439 void
440 bpress(XEvent *e) {
441 mousereport(e);
442 sel.mode = 1;
443 sel.ex = sel.bx = (e->xbutton.x - BORDER)/xw.cw;
444 sel.ey = sel.by = (e->xbutton.y - BORDER)/xw.ch;
445 }
446
447 void
448 selcopy(void) {
449 char *str, *ptr;
450 int x, y, sz, sl, ls = 0;
451
452 if(sel.bx == -1)
453 str = NULL;
454 else {
455 sz = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
456 ptr = str = malloc(sz);
457 for(y = 0; y < term.row; y++) {
458 for(x = 0; x < term.col; x++)
459 if(term.line[y][x].state & GLYPH_SET && (ls = selected(x, y))) {
460 sl = utf8size(term.line[y][x].c);
461 memcpy(ptr, term.line[y][x].c, sl);
462 ptr += sl;
463 }
464 if(ls && y < sel.e.y)
465 *ptr++ = '\n';
466 }
467 *ptr = 0;
468 }
469 xsetsel(str);
470 }
471
472 void
473 selnotify(XEvent *e) {
474 unsigned long nitems;
475 unsigned long ofs, rem;
476 int format;
477 unsigned char *data;
478 Atom type;
479
480 ofs = 0;
481 do {
482 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
483 False, AnyPropertyType, &type, &format,
484 &nitems, &rem, &data)) {
485 fprintf(stderr, "Clipboard allocation failed\n");
486 return;
487 }
488 ttywrite((const char *) data, nitems * format / 8);
489 XFree(data);
490 /* number of 32-bit chunks returned */
491 ofs += nitems * format / 32;
492 } while(rem > 0);
493 }
494
495 void
496 selpaste() {
497 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY, xw.win, CurrentTime);
498 }
499
500 void
501 selrequest(XEvent *e) {
502 XSelectionRequestEvent *xsre;
503 XSelectionEvent xev;
504 Atom xa_targets;
505
506 xsre = (XSelectionRequestEvent *) e;
507 xev.type = SelectionNotify;
508 xev.requestor = xsre->requestor;
509 xev.selection = xsre->selection;
510 xev.target = xsre->target;
511 xev.time = xsre->time;
512 /* reject */
513 xev.property = None;
514
515 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
516 if(xsre->target == xa_targets) {
517 /* respond with the supported type */
518 Atom string = sel.xtarget;
519 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
520 XA_ATOM, 32, PropModeReplace,
521 (unsigned char *) &string, 1);
522 xev.property = xsre->property;
523 } else if(xsre->target == sel.xtarget) {
524 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
525 xsre->target, 8, PropModeReplace,
526 (unsigned char *) sel.clip, strlen(sel.clip));
527 xev.property = xsre->property;
528 }
529
530 /* all done, send a notification to the listener */
531 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
532 fprintf(stderr, "Error sending SelectionNotify event\n");
533 }
534
535 void
536 xsetsel(char *str) {
537 /* register the selection for both the clipboard and the primary */
538 Atom clipboard;
539
540 free(sel.clip);
541 sel.clip = str;
542
543 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
544
545 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
546 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
547
548 XFlush(xw.dpy);
549 }
550
551 void
552 brelease(XEvent *e) {
553 int b;
554
555 sel.mode = 0;
556 getbuttoninfo(e, &b, &sel.ex, &sel.ey);
557 mousereport(e);
558 if(sel.bx == sel.ex && sel.by == sel.ey) {
559 sel.bx = -1;
560 if(b == 2)
561 selpaste();
562 else if(b == 1) {
563 struct timeval now;
564 gettimeofday(&now, NULL);
565
566 if(TIMEDIFFERENCE(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
567 /* triple click on the line */
568 sel.b.x = sel.bx = 0;
569 sel.e.x = sel.ex = term.col;
570 sel.b.y = sel.e.y = sel.ey;
571 selcopy();
572 } else if(TIMEDIFFERENCE(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
573 /* double click to select word */
574 sel.bx = sel.ex;
575 while(term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
576 term.line[sel.ey][sel.bx-1].c[0] != ' ') sel.bx--;
577 sel.b.x = sel.bx;
578 while(term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
579 term.line[sel.ey][sel.ex+1].c[0] != ' ') sel.ex++;
580 sel.e.x = sel.ex;
581 sel.b.y = sel.e.y = sel.ey;
582 selcopy();
583 }
584 }
585 } else if(b == 1)
586 selcopy();
587 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
588 gettimeofday(&sel.tclick1, NULL);
589 draw();
590 }
591
592 void
593 bmotion(XEvent *e) {
594 if(sel.mode) {
595 int oldey = sel.ey,
596 oldex = sel.ex;
597 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
598
599 if(oldey != sel.ey || oldex != sel.ex) {
600 int starty = MIN(oldey, sel.ey);
601 int endy = MAX(oldey, sel.ey);
602 drawregion(0, (starty > 0 ? starty : 0), term.col, (sel.ey < term.row ? endy+1 : term.row));
603 }
604 }
605 }
606
607 void
608 die(const char *errstr, ...) {
609 va_list ap;
610
611 va_start(ap, errstr);
612 vfprintf(stderr, errstr, ap);
613 va_end(ap);
614 exit(EXIT_FAILURE);
615 }
616
617 void
618 execsh(void) {
619 char **args;
620 char *envshell = getenv("SHELL");
621
622 DEFAULT(envshell, "sh");
623 putenv("TERM="TNAME);
624 args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
625 execvp(args[0], args);
626 exit(EXIT_FAILURE);
627 }
628
629 void
630 sigchld(int a) {
631 int stat = 0;
632 if(waitpid(pid, &stat, 0) < 0)
633 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
634 if(WIFEXITED(stat))
635 exit(WEXITSTATUS(stat));
636 else
637 exit(EXIT_FAILURE);
638 }
639
640 void
641 ttynew(void) {
642 int m, s;
643
644 /* seems to work fine on linux, openbsd and freebsd */
645 struct winsize w = {term.row, term.col, 0, 0};
646 if(openpty(&m, &s, NULL, NULL, &w) < 0)
647 die("openpty failed: %s\n", SERRNO);
648
649 switch(pid = fork()) {
650 case -1:
651 die("fork failed\n");
652 break;
653 case 0:
654 setsid(); /* create a new process group */
655 dup2(s, STDIN_FILENO);
656 dup2(s, STDOUT_FILENO);
657 dup2(s, STDERR_FILENO);
658 if(ioctl(s, TIOCSCTTY, NULL) < 0)
659 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
660 close(s);
661 close(m);
662 execsh();
663 break;
664 default:
665 close(s);
666 cmdfd = m;
667 signal(SIGCHLD, sigchld);
668 }
669 }
670
671 void
672 dump(char c) {
673 static int col;
674 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
675 if(++col % 10 == 0)
676 fprintf(stderr, "\n");
677 }
678
679 void
680 ttyread(void) {
681 static char buf[BUFSIZ];
682 static int buflen = 0;
683 char *ptr;
684 char s[UTF_SIZ];
685 int charsize; /* size of utf8 char in bytes */
686 long utf8c;
687 int ret;
688
689 /* append read bytes to unprocessed bytes */
690 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
691 die("Couldn't read from shell: %s\n", SERRNO);
692
693 /* process every complete utf8 char */
694 buflen += ret;
695 ptr = buf;
696 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
697 charsize = utf8decode(ptr, &utf8c);
698 utf8encode(&utf8c, s);
699 tputc(s);
700 ptr += charsize;
701 buflen -= charsize;
702 }
703
704 /* keep any uncomplete utf8 char for the next call */
705 memmove(buf, ptr, buflen);
706 }
707
708 void
709 ttywrite(const char *s, size_t n) {
710 if(write(cmdfd, s, n) == -1)
711 die("write error on tty: %s\n", SERRNO);
712 }
713
714 void
715 ttyresize(int x, int y) {
716 struct winsize w;
717
718 w.ws_row = term.row;
719 w.ws_col = term.col;
720 w.ws_xpixel = w.ws_ypixel = 0;
721 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
722 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
723 }
724
725 void
726 tcursor(int mode) {
727 static TCursor c;
728
729 if(mode == CURSOR_SAVE)
730 c = term.c;
731 else if(mode == CURSOR_LOAD)
732 term.c = c, tmoveto(c.x, c.y);
733 }
734
735 void
736 treset(void) {
737 term.c = (TCursor){{
738 .mode = ATTR_NULL,
739 .fg = DefaultFG,
740 .bg = DefaultBG
741 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
742
743 term.top = 0, term.bot = term.row - 1;
744 term.mode = MODE_WRAP;
745 tclearregion(0, 0, term.col-1, term.row-1);
746 }
747
748 void
749 tnew(int col, int row) {
750 /* set screen size */
751 term.row = row, term.col = col;
752 term.line = malloc(term.row * sizeof(Line));
753 term.alt = malloc(term.row * sizeof(Line));
754 for(row = 0 ; row < term.row; row++) {
755 term.line[row] = malloc(term.col * sizeof(Glyph));
756 term.alt [row] = malloc(term.col * sizeof(Glyph));
757 }
758 /* setup screen */
759 treset();
760 }
761
762 void
763 tswapscreen(void) {
764 Line* tmp = term.line;
765 term.line = term.alt;
766 term.alt = tmp;
767 term.mode ^= MODE_ALTSCREEN;
768 }
769
770 void
771 tscrolldown(int orig, int n) {
772 int i;
773 Line temp;
774
775 LIMIT(n, 0, term.bot-orig+1);
776
777 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
778
779 for(i = term.bot; i >= orig+n; i--) {
780 temp = term.line[i];
781 term.line[i] = term.line[i-n];
782 term.line[i-n] = temp;
783 }
784 }
785
786 void
787 tscrollup(int orig, int n) {
788 int i;
789 Line temp;
790 LIMIT(n, 0, term.bot-orig+1);
791
792 tclearregion(0, orig, term.col-1, orig+n-1);
793
794 for(i = orig; i <= term.bot-n; i++) {
795 temp = term.line[i];
796 term.line[i] = term.line[i+n];
797 term.line[i+n] = temp;
798 }
799 }
800
801 void
802 tnewline(int first_col) {
803 int y = term.c.y;
804 if(y == term.bot)
805 tscrollup(term.top, 1);
806 else
807 y++;
808 tmoveto(first_col ? 0 : term.c.x, y);
809 }
810
811 void
812 csiparse(void) {
813 /* int noarg = 1; */
814 char *p = escseq.buf;
815
816 escseq.narg = 0;
817 if(*p == '?')
818 escseq.priv = 1, p++;
819
820 while(p < escseq.buf+escseq.len) {
821 while(isdigit(*p)) {
822 escseq.arg[escseq.narg] *= 10;
823 escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
824 }
825 if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
826 escseq.narg++, p++;
827 else {
828 escseq.mode = *p;
829 escseq.narg++;
830 return;
831 }
832 }
833 }
834
835 void
836 tmoveto(int x, int y) {
837 LIMIT(x, 0, term.col-1);
838 LIMIT(y, 0, term.row-1);
839 term.c.state &= ~CURSOR_WRAPNEXT;
840 term.c.x = x;
841 term.c.y = y;
842 }
843
844 void
845 tsetchar(char *c) {
846 term.line[term.c.y][term.c.x] = term.c.attr;
847 memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
848 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
849 }
850
851 void
852 tclearregion(int x1, int y1, int x2, int y2) {
853 int x, y, temp;
854
855 if(x1 > x2)
856 temp = x1, x1 = x2, x2 = temp;
857 if(y1 > y2)
858 temp = y1, y1 = y2, y2 = temp;
859
860 LIMIT(x1, 0, term.col-1);
861 LIMIT(x2, 0, term.col-1);
862 LIMIT(y1, 0, term.row-1);
863 LIMIT(y2, 0, term.row-1);
864
865 for(y = y1; y <= y2; y++)
866 for(x = x1; x <= x2; x++)
867 term.line[y][x].state = 0;
868 }
869
870 void
871 tdeletechar(int n) {
872 int src = term.c.x + n;
873 int dst = term.c.x;
874 int size = term.col - src;
875
876 if(src >= term.col) {
877 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
878 return;
879 }
880 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
881 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
882 }
883
884 void
885 tinsertblank(int n) {
886 int src = term.c.x;
887 int dst = src + n;
888 int size = term.col - dst;
889
890 if(dst >= term.col) {
891 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
892 return;
893 }
894 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
895 tclearregion(src, term.c.y, dst - 1, term.c.y);
896 }
897
898 void
899 tinsertblankline(int n) {
900 if(term.c.y < term.top || term.c.y > term.bot)
901 return;
902
903 tscrolldown(term.c.y, n);
904 }
905
906 void
907 tdeleteline(int n) {
908 if(term.c.y < term.top || term.c.y > term.bot)
909 return;
910
911 tscrollup(term.c.y, n);
912 }
913
914 void
915 tsetattr(int *attr, int l) {
916 int i;
917
918 for(i = 0; i < l; i++) {
919 switch(attr[i]) {
920 case 0:
921 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
922 term.c.attr.fg = DefaultFG;
923 term.c.attr.bg = DefaultBG;
924 break;
925 case 1:
926 term.c.attr.mode |= ATTR_BOLD;
927 break;
928 case 4:
929 term.c.attr.mode |= ATTR_UNDERLINE;
930 break;
931 case 7:
932 term.c.attr.mode |= ATTR_REVERSE;
933 break;
934 case 22:
935 term.c.attr.mode &= ~ATTR_BOLD;
936 break;
937 case 24:
938 term.c.attr.mode &= ~ATTR_UNDERLINE;
939 break;
940 case 27:
941 term.c.attr.mode &= ~ATTR_REVERSE;
942 break;
943 case 38:
944 if(i + 2 < l && attr[i + 1] == 5) {
945 i += 2;
946 if(BETWEEN(attr[i], 0, 255))
947 term.c.attr.fg = attr[i];
948 else
949 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
950 }
951 else
952 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
953 break;
954 case 39:
955 term.c.attr.fg = DefaultFG;
956 break;
957 case 48:
958 if(i + 2 < l && attr[i + 1] == 5) {
959 i += 2;
960 if(BETWEEN(attr[i], 0, 255))
961 term.c.attr.bg = attr[i];
962 else
963 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
964 }
965 else
966 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
967 break;
968 case 49:
969 term.c.attr.bg = DefaultBG;
970 break;
971 default:
972 if(BETWEEN(attr[i], 30, 37))
973 term.c.attr.fg = attr[i] - 30;
974 else if(BETWEEN(attr[i], 40, 47))
975 term.c.attr.bg = attr[i] - 40;
976 else if(BETWEEN(attr[i], 90, 97))
977 term.c.attr.fg = attr[i] - 90 + 8;
978 else if(BETWEEN(attr[i], 100, 107))
979 term.c.attr.fg = attr[i] - 100 + 8;
980 else
981 fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]), csidump();
982
983 break;
984 }
985 }
986 }
987
988 void
989 tsetscroll(int t, int b) {
990 int temp;
991
992 LIMIT(t, 0, term.row-1);
993 LIMIT(b, 0, term.row-1);
994 if(t > b) {
995 temp = t;
996 t = b;
997 b = temp;
998 }
999 term.top = t;
1000 term.bot = b;
1001 }
1002
1003 void
1004 csihandle(void) {
1005 switch(escseq.mode) {
1006 default:
1007 unknown:
1008 fprintf(stderr, "erresc: unknown csi ");
1009 csidump();
1010 /* die(""); */
1011 break;
1012 case '@': /* ICH -- Insert <n> blank char */
1013 DEFAULT(escseq.arg[0], 1);
1014 tinsertblank(escseq.arg[0]);
1015 break;
1016 case 'A': /* CUU -- Cursor <n> Up */
1017 case 'e':
1018 DEFAULT(escseq.arg[0], 1);
1019 tmoveto(term.c.x, term.c.y-escseq.arg[0]);
1020 break;
1021 case 'B': /* CUD -- Cursor <n> Down */
1022 DEFAULT(escseq.arg[0], 1);
1023 tmoveto(term.c.x, term.c.y+escseq.arg[0]);
1024 break;
1025 case 'C': /* CUF -- Cursor <n> Forward */
1026 case 'a':
1027 DEFAULT(escseq.arg[0], 1);
1028 tmoveto(term.c.x+escseq.arg[0], term.c.y);
1029 break;
1030 case 'D': /* CUB -- Cursor <n> Backward */
1031 DEFAULT(escseq.arg[0], 1);
1032 tmoveto(term.c.x-escseq.arg[0], term.c.y);
1033 break;
1034 case 'E': /* CNL -- Cursor <n> Down and first col */
1035 DEFAULT(escseq.arg[0], 1);
1036 tmoveto(0, term.c.y+escseq.arg[0]);
1037 break;
1038 case 'F': /* CPL -- Cursor <n> Up and first col */
1039 DEFAULT(escseq.arg[0], 1);
1040 tmoveto(0, term.c.y-escseq.arg[0]);
1041 break;
1042 case 'G': /* CHA -- Move to <col> */
1043 case '`': /* XXX: HPA -- same? */
1044 DEFAULT(escseq.arg[0], 1);
1045 tmoveto(escseq.arg[0]-1, term.c.y);
1046 break;
1047 case 'H': /* CUP -- Move to <row> <col> */
1048 case 'f': /* XXX: HVP -- same? */
1049 DEFAULT(escseq.arg[0], 1);
1050 DEFAULT(escseq.arg[1], 1);
1051 tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
1052 break;
1053 /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
1054 case 'J': /* ED -- Clear screen */
1055 switch(escseq.arg[0]) {
1056 case 0: /* below */
1057 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1058 if(term.c.y < term.row-1)
1059 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1060 break;
1061 case 1: /* above */
1062 if(term.c.y > 1)
1063 tclearregion(0, 0, term.col-1, term.c.y-1);
1064 tclearregion(0, term.c.y, term.c.x, term.c.y);
1065 break;
1066 case 2: /* all */
1067 tclearregion(0, 0, term.col-1, term.row-1);
1068 break;
1069 default:
1070 goto unknown;
1071 }
1072 break;
1073 case 'K': /* EL -- Clear line */
1074 switch(escseq.arg[0]) {
1075 case 0: /* right */
1076 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1077 break;
1078 case 1: /* left */
1079 tclearregion(0, term.c.y, term.c.x, term.c.y);
1080 break;
1081 case 2: /* all */
1082 tclearregion(0, term.c.y, term.col-1, term.c.y);
1083 break;
1084 }
1085 break;
1086 case 'S': /* SU -- Scroll <n> line up */
1087 DEFAULT(escseq.arg[0], 1);
1088 tscrollup(term.top, escseq.arg[0]);
1089 break;
1090 case 'T': /* SD -- Scroll <n> line down */
1091 DEFAULT(escseq.arg[0], 1);
1092 tscrolldown(term.top, escseq.arg[0]);
1093 break;
1094 case 'L': /* IL -- Insert <n> blank lines */
1095 DEFAULT(escseq.arg[0], 1);
1096 tinsertblankline(escseq.arg[0]);
1097 break;
1098 case 'l': /* RM -- Reset Mode */
1099 if(escseq.priv) {
1100 switch(escseq.arg[0]) {
1101 case 1:
1102 term.mode &= ~MODE_APPKEYPAD;
1103 break;
1104 case 5: /* TODO: DECSCNM -- Remove reverse video */
1105 break;
1106 case 7:
1107 term.mode &= ~MODE_WRAP;
1108 break;
1109 case 12: /* att610 -- Stop blinking cursor (IGNORED) */
1110 break;
1111 case 20:
1112 term.mode &= ~MODE_CRLF;
1113 break;
1114 case 25:
1115 term.c.state |= CURSOR_HIDE;
1116 break;
1117 case 1000: /* disable X11 xterm mouse reporting */
1118 term.mode &= ~MODE_MOUSE;
1119 break;
1120 case 1049: /* = 1047 and 1048 */
1121 case 1047:
1122 if(IS_SET(MODE_ALTSCREEN)) {
1123 tclearregion(0, 0, term.col-1, term.row-1);
1124 tswapscreen();
1125 }
1126 if(escseq.arg[0] == 1047)
1127 break;
1128 case 1048:
1129 tcursor(CURSOR_LOAD);
1130 break;
1131 default:
1132 goto unknown;
1133 }
1134 } else {
1135 switch(escseq.arg[0]) {
1136 case 4:
1137 term.mode &= ~MODE_INSERT;
1138 break;
1139 default:
1140 goto unknown;
1141 }
1142 }
1143 break;
1144 case 'M': /* DL -- Delete <n> lines */
1145 DEFAULT(escseq.arg[0], 1);
1146 tdeleteline(escseq.arg[0]);
1147 break;
1148 case 'X': /* ECH -- Erase <n> char */
1149 DEFAULT(escseq.arg[0], 1);
1150 tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
1151 break;
1152 case 'P': /* DCH -- Delete <n> char */
1153 DEFAULT(escseq.arg[0], 1);
1154 tdeletechar(escseq.arg[0]);
1155 break;
1156 /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
1157 case 'd': /* VPA -- Move to <row> */
1158 DEFAULT(escseq.arg[0], 1);
1159 tmoveto(term.c.x, escseq.arg[0]-1);
1160 break;
1161 case 'h': /* SM -- Set terminal mode */
1162 if(escseq.priv) {
1163 switch(escseq.arg[0]) {
1164 case 1:
1165 term.mode |= MODE_APPKEYPAD;
1166 break;
1167 case 5: /* DECSCNM -- Reverve video */
1168 /* TODO: set REVERSE on the whole screen (f) */
1169 break;
1170 case 7:
1171 term.mode |= MODE_WRAP;
1172 break;
1173 case 20:
1174 term.mode |= MODE_CRLF;
1175 break;
1176 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1177 /* fallthrough for xterm cvvis = CSI [ ? 12 ; 25 h */
1178 if(escseq.narg > 1 && escseq.arg[1] != 25)
1179 break;
1180 case 25:
1181 term.c.state &= ~CURSOR_HIDE;
1182 break;
1183 case 1000: /* enable X11 xterm mouse reporting */
1184 term.mode |= MODE_MOUSE;
1185 break;
1186 case 1049: /* = 1047 and 1048 */
1187 case 1047:
1188 if(IS_SET(MODE_ALTSCREEN))
1189 tclearregion(0, 0, term.col-1, term.row-1);
1190 else
1191 tswapscreen();
1192 if(escseq.arg[0] == 1047)
1193 break;
1194 case 1048:
1195 tcursor(CURSOR_SAVE);
1196 break;
1197 default: goto unknown;
1198 }
1199 } else {
1200 switch(escseq.arg[0]) {
1201 case 4:
1202 term.mode |= MODE_INSERT;
1203 break;
1204 default: goto unknown;
1205 }
1206 };
1207 break;
1208 case 'm': /* SGR -- Terminal attribute (color) */
1209 tsetattr(escseq.arg, escseq.narg);
1210 break;
1211 case 'r': /* DECSTBM -- Set Scrolling Region */
1212 if(escseq.priv)
1213 goto unknown;
1214 else {
1215 DEFAULT(escseq.arg[0], 1);
1216 DEFAULT(escseq.arg[1], term.row);
1217 tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
1218 tmoveto(0, 0);
1219 }
1220 break;
1221 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1222 tcursor(CURSOR_SAVE);
1223 break;
1224 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1225 tcursor(CURSOR_LOAD);
1226 break;
1227 }
1228 }
1229
1230 void
1231 csidump(void) {
1232 int i;
1233 printf("ESC [ %s", escseq.priv ? "? " : "");
1234 if(escseq.narg)
1235 for(i = 0; i < escseq.narg; i++)
1236 printf("%d ", escseq.arg[i]);
1237 if(escseq.mode)
1238 putchar(escseq.mode);
1239 putchar('\n');
1240 }
1241
1242 void
1243 csireset(void) {
1244 memset(&escseq, 0, sizeof(escseq));
1245 }
1246
1247 void
1248 tputtab(void) {
1249 int space = TAB - term.c.x % TAB;
1250 tmoveto(term.c.x + space, term.c.y);
1251 }
1252
1253 void
1254 tputc(char *c) {
1255 char ascii = *c;
1256 if(term.esc & ESC_START) {
1257 if(term.esc & ESC_CSI) {
1258 escseq.buf[escseq.len++] = ascii;
1259 if(BETWEEN(ascii, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
1260 term.esc = 0;
1261 csiparse(), csihandle();
1262 }
1263 /* TODO: handle other OSC */
1264 } else if(term.esc & ESC_OSC) {
1265 if(ascii == ';') {
1266 term.titlelen = 0;
1267 term.esc = ESC_START | ESC_TITLE;
1268 }
1269 } else if(term.esc & ESC_TITLE) {
1270 if(ascii == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
1271 term.esc = 0;
1272 term.title[term.titlelen] = '\0';
1273 XStoreName(xw.dpy, xw.win, term.title);
1274 } else {
1275 term.title[term.titlelen++] = ascii;
1276 }
1277 } else if(term.esc & ESC_ALTCHARSET) {
1278 switch(ascii) {
1279 case '0': /* Line drawing crap */
1280 term.c.attr.mode |= ATTR_GFX;
1281 break;
1282 case 'B': /* Back to regular text */
1283 term.c.attr.mode &= ~ATTR_GFX;
1284 break;
1285 default:
1286 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1287 }
1288 term.esc = 0;
1289 } else {
1290 switch(ascii) {
1291 case '[':
1292 term.esc |= ESC_CSI;
1293 break;
1294 case ']':
1295 term.esc |= ESC_OSC;
1296 break;
1297 case '(':
1298 term.esc |= ESC_ALTCHARSET;
1299 break;
1300 case 'D': /* IND -- Linefeed */
1301 if(term.c.y == term.bot)
1302 tscrollup(term.top, 1);
1303 else
1304 tmoveto(term.c.x, term.c.y+1);
1305 term.esc = 0;
1306 break;
1307 case 'E': /* NEL -- Next line */
1308 tnewline(1); /* always go to first col */
1309 term.esc = 0;
1310 break;
1311 case 'M': /* RI -- Reverse index */
1312 if(term.c.y == term.top)
1313 tscrolldown(term.top, 1);
1314 else
1315 tmoveto(term.c.x, term.c.y-1);
1316 term.esc = 0;
1317 break;
1318 case 'c': /* RIS -- Reset to inital state */
1319 treset();
1320 term.esc = 0;
1321 break;
1322 case '=': /* DECPAM -- Application keypad */
1323 term.mode |= MODE_APPKEYPAD;
1324 term.esc = 0;
1325 break;
1326 case '>': /* DECPNM -- Normal keypad */
1327 term.mode &= ~MODE_APPKEYPAD;
1328 term.esc = 0;
1329 break;
1330 case '7': /* DECSC -- Save Cursor */
1331 tcursor(CURSOR_SAVE);
1332 term.esc = 0;
1333 break;
1334 case '8': /* DECRC -- Restore Cursor */
1335 tcursor(CURSOR_LOAD);
1336 term.esc = 0;
1337 break;
1338 default:
1339 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
1340 (unsigned char) ascii, isprint(ascii)?ascii:'.');
1341 term.esc = 0;
1342 }
1343 }
1344 } else {
1345 switch(ascii) {
1346 case '\t':
1347 tputtab();
1348 break;
1349 case '\b':
1350 tmoveto(term.c.x-1, term.c.y);
1351 break;
1352 case '\r':
1353 tmoveto(0, term.c.y);
1354 break;
1355 case '\f':
1356 case '\v':
1357 case '\n':
1358 /* go to first col if the mode is set */
1359 tnewline(IS_SET(MODE_CRLF));
1360 break;
1361 case '\a':
1362 if(!(xw.state & WIN_FOCUSED))
1363 xseturgency(1);
1364 break;
1365 case '\033':
1366 csireset();
1367 term.esc = ESC_START;
1368 break;
1369 default:
1370 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1371 tnewline(1); /* always go to first col */
1372 tsetchar(c);
1373 if(term.c.x+1 < term.col)
1374 tmoveto(term.c.x+1, term.c.y);
1375 else
1376 term.c.state |= CURSOR_WRAPNEXT;
1377 }
1378 }
1379 }
1380
1381 int
1382 tresize(int col, int row) {
1383 int i, x;
1384 int minrow = MIN(row, term.row);
1385 int mincol = MIN(col, term.col);
1386 int slide = term.c.y - row + 1;
1387
1388 if(col < 1 || row < 1)
1389 return 0;
1390
1391 /* free unneeded rows */
1392 i = 0;
1393 if(slide > 0) {
1394 /* slide screen to keep cursor where we expect it -
1395 * tscrollup would work here, but we can optimize to
1396 * memmove because we're freeing the earlier lines */
1397 for(/* i = 0 */; i < slide; i++) {
1398 free(term.line[i]);
1399 free(term.alt[i]);
1400 }
1401 memmove(term.line, term.line + slide, row * sizeof(Line));
1402 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1403 }
1404 for(i += row; i < term.row; i++) {
1405 free(term.line[i]);
1406 free(term.alt[i]);
1407 }
1408
1409 /* resize to new height */
1410 term.line = realloc(term.line, row * sizeof(Line));
1411 term.alt = realloc(term.alt, row * sizeof(Line));
1412
1413 /* resize each row to new width, zero-pad if needed */
1414 for(i = 0; i < minrow; i++) {
1415 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
1416 term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
1417 for(x = mincol; x < col; x++) {
1418 term.line[i][x].state = 0;
1419 term.alt[i][x].state = 0;
1420 }
1421 }
1422
1423 /* allocate any new rows */
1424 for(/* i == minrow */; i < row; i++) {
1425 term.line[i] = calloc(col, sizeof(Glyph));
1426 term.alt [i] = calloc(col, sizeof(Glyph));
1427 }
1428
1429 /* update terminal size */
1430 term.col = col, term.row = row;
1431 /* make use of the LIMIT in tmoveto */
1432 tmoveto(term.c.x, term.c.y);
1433 /* reset scrolling region */
1434 tsetscroll(0, row-1);
1435 return (slide > 0);
1436 }
1437
1438 void
1439 xresize(int col, int row) {
1440 Pixmap newbuf;
1441 int oldw, oldh;
1442
1443 oldw = xw.bufw;
1444 oldh = xw.bufh;
1445 xw.bufw = MAX(1, col * xw.cw);
1446 xw.bufh = MAX(1, row * xw.ch);
1447 newbuf = XCreatePixmap(xw.dpy, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dpy, xw.scr));
1448 XCopyArea(xw.dpy, xw.buf, newbuf, dc.gc, 0, 0, xw.bufw, xw.bufh, 0, 0);
1449 XFreePixmap(xw.dpy, xw.buf);
1450 XSetForeground(xw.dpy, dc.gc, dc.col[DefaultBG]);
1451 if(xw.bufw > oldw)
1452 XFillRectangle(xw.dpy, newbuf, dc.gc, oldw, 0,
1453 xw.bufw-oldw, MIN(xw.bufh, oldh));
1454 else if(xw.bufw < oldw && (BORDER > 0 || xw.w > xw.bufw))
1455 XClearArea(xw.dpy, xw.win, BORDER+xw.bufw, BORDER,
1456 xw.w-xw.bufh-BORDER, BORDER+MIN(xw.bufh, oldh),
1457 False);
1458 if(xw.bufh > oldh)
1459 XFillRectangle(xw.dpy, newbuf, dc.gc, 0, oldh,
1460 xw.bufw, xw.bufh-oldh);
1461 else if(xw.bufh < oldh && (BORDER > 0 || xw.h > xw.bufh))
1462 XClearArea(xw.dpy, xw.win, BORDER, BORDER+xw.bufh,
1463 xw.w-2*BORDER, xw.h-xw.bufh-BORDER,
1464 False);
1465 xw.buf = newbuf;
1466 }
1467
1468 void
1469 xloadcols(void) {
1470 int i, r, g, b;
1471 XColor color;
1472 unsigned long white = WhitePixel(xw.dpy, xw.scr);
1473
1474 for(i = 0; i < 16; i++) {
1475 if(!XAllocNamedColor(xw.dpy, xw.cmap, colorname[i], &color, &color)) {
1476 dc.col[i] = white;
1477 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1478 } else
1479 dc.col[i] = color.pixel;
1480 }
1481
1482 /* same colors as xterm */
1483 for(r = 0; r < 6; r++)
1484 for(g = 0; g < 6; g++)
1485 for(b = 0; b < 6; b++) {
1486 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1487 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1488 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1489 if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
1490 dc.col[i] = white;
1491 fprintf(stderr, "Could not allocate color %d\n", i);
1492 } else
1493 dc.col[i] = color.pixel;
1494 i++;
1495 }
1496
1497 for(r = 0; r < 24; r++, i++) {
1498 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1499 if (!XAllocColor(xw.dpy, xw.cmap, &color)) {
1500 dc.col[i] = white;
1501 fprintf(stderr, "Could not allocate color %d\n", i);
1502 } else
1503 dc.col[i] = color.pixel;
1504 }
1505 }
1506
1507 void
1508 xclear(int x1, int y1, int x2, int y2) {
1509 XSetForeground(xw.dpy, dc.gc, dc.col[DefaultBG]);
1510 XFillRectangle(xw.dpy, xw.buf, dc.gc,
1511 x1 * xw.cw, y1 * xw.ch,
1512 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1513 }
1514
1515 void
1516 xhints(void) {
1517 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
1518 XWMHints wm = {.flags = InputHint, .input = 1};
1519 XSizeHints size = {
1520 .flags = PSize | PResizeInc | PBaseSize,
1521 .height = xw.h,
1522 .width = xw.w,
1523 .height_inc = xw.ch,
1524 .width_inc = xw.cw,
1525 .base_height = 2*BORDER,
1526 .base_width = 2*BORDER,
1527 };
1528 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
1529 }
1530
1531 XFontSet
1532 xinitfont(char *fontstr) {
1533 XFontSet set;
1534 char *def, **missing;
1535 int n;
1536
1537 missing = NULL;
1538 set = XCreateFontSet(xw.dpy, fontstr, &missing, &n, &def);
1539 if(missing) {
1540 while(n--)
1541 fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
1542 XFreeStringList(missing);
1543 }
1544 return set;
1545 }
1546
1547 void
1548 xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing) {
1549 XFontStruct **xfonts;
1550 char **font_names;
1551 int i, n;
1552
1553 *ascent = *descent = *lbearing = *rbearing = 0;
1554 n = XFontsOfFontSet(set, &xfonts, &font_names);
1555 for(i = 0; i < n; i++) {
1556 *ascent = MAX(*ascent, (*xfonts)->ascent);
1557 *descent = MAX(*descent, (*xfonts)->descent);
1558 *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
1559 *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
1560 xfonts++;
1561 }
1562 }
1563
1564 void
1565 initfonts(char *fontstr, char *bfontstr) {
1566 if((dc.font.set = xinitfont(fontstr)) == NULL ||
1567 (dc.bfont.set = xinitfont(bfontstr)) == NULL)
1568 die("Can't load font %s\n", dc.font.set ? BOLDFONT : FONT);
1569 xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
1570 &dc.font.lbearing, &dc.font.rbearing);
1571 xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
1572 &dc.bfont.lbearing, &dc.bfont.rbearing);
1573 }
1574
1575 void
1576 xinit(void) {
1577 XSetWindowAttributes attrs;
1578 Cursor cursor;
1579
1580 if(!(xw.dpy = XOpenDisplay(NULL)))
1581 die("Can't open display\n");
1582 xw.scr = XDefaultScreen(xw.dpy);
1583
1584 /* font */
1585 initfonts(FONT, BOLDFONT);
1586
1587 /* XXX: Assuming same size for bold font */
1588 xw.cw = dc.font.rbearing - dc.font.lbearing;
1589 xw.ch = dc.font.ascent + dc.font.descent;
1590
1591 /* colors */
1592 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1593 xloadcols();
1594
1595 /* window - default size */
1596 xw.bufh = 24 * xw.ch;
1597 xw.bufw = 80 * xw.cw;
1598 xw.h = xw.bufh + 2*BORDER;
1599 xw.w = xw.bufw + 2*BORDER;
1600
1601 attrs.background_pixel = dc.col[DefaultBG];
1602 attrs.border_pixel = dc.col[DefaultBG];
1603 attrs.bit_gravity = NorthWestGravity;
1604 attrs.event_mask = FocusChangeMask | KeyPressMask
1605 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1606 | PointerMotionMask | ButtonPressMask | ButtonReleaseMask;
1607 attrs.colormap = xw.cmap;
1608
1609 xw.win = XCreateWindow(xw.dpy, XRootWindow(xw.dpy, xw.scr), 0, 0,
1610 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
1611 XDefaultVisual(xw.dpy, xw.scr),
1612 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
1613 | CWColormap,
1614 &attrs);
1615 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dpy, xw.scr));
1616
1617
1618 /* input methods */
1619 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
1620 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
1621 | XIMStatusNothing, XNClientWindow, xw.win,
1622 XNFocusWindow, xw.win, NULL);
1623 /* gc */
1624 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
1625
1626 /* white cursor, black outline */
1627 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
1628 XDefineCursor(xw.dpy, xw.win, cursor);
1629 XRecolorCursor(xw.dpy, cursor,
1630 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
1631 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
1632
1633 XMapWindow(xw.dpy, xw.win);
1634 xhints();
1635 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
1636 XSync(xw.dpy, 0);
1637 }
1638
1639 void
1640 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
1641 unsigned long xfg, xbg;
1642 int winx = x*xw.cw, winy = y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
1643 int i;
1644
1645 if(base.mode & ATTR_REVERSE)
1646 xfg = dc.col[base.bg], xbg = dc.col[base.fg];
1647 else
1648 xfg = dc.col[base.fg], xbg = dc.col[base.bg];
1649
1650 XSetBackground(xw.dpy, dc.gc, xbg);
1651 XSetForeground(xw.dpy, dc.gc, xfg);
1652
1653 if(base.mode & ATTR_GFX) {
1654 for(i = 0; i < bytelen; i++) {
1655 char c = gfx[(unsigned int)s[i] % 256];
1656 if(c)
1657 s[i] = c;
1658 else if(s[i] > 0x5f)
1659 s[i] -= 0x5f;
1660 }
1661 }
1662
1663 XmbDrawImageString(xw.dpy, xw.buf, base.mode & ATTR_BOLD ? dc.bfont.set : dc.font.set,
1664 dc.gc, winx, winy, s, bytelen);
1665
1666 if(base.mode & ATTR_UNDERLINE)
1667 XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
1668 }
1669
1670 void
1671 xdrawcursor(void) {
1672 static int oldx = 0;
1673 static int oldy = 0;
1674 int sl;
1675 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
1676
1677 LIMIT(oldx, 0, term.col-1);
1678 LIMIT(oldy, 0, term.row-1);
1679
1680 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
1681 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
1682
1683 /* remove the old cursor */
1684 if(term.line[oldy][oldx].state & GLYPH_SET) {
1685 sl = utf8size(term.line[oldy][oldx].c);
1686 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
1687 } else
1688 xclear(oldx, oldy, oldx, oldy);
1689
1690 /* draw the new one */
1691 if(!(term.c.state & CURSOR_HIDE) && (xw.state & WIN_FOCUSED)) {
1692 sl = utf8size(g.c);
1693 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
1694 oldx = term.c.x, oldy = term.c.y;
1695 }
1696 }
1697
1698 void
1699 draw() {
1700 drawregion(0, 0, term.col, term.row);
1701 }
1702
1703 void
1704 drawregion(int x1, int y1, int x2, int y2) {
1705 int ic, ib, x, y, ox, sl;
1706 Glyph base, new;
1707 char buf[DRAW_BUF_SIZ];
1708
1709 if(!(xw.state & WIN_VISIBLE))
1710 return;
1711
1712 xclear(x1, y1, x2-1, y2-1);
1713 for(y = y1; y < y2; y++) {
1714 base = term.line[y][0];
1715 ic = ib = ox = 0;
1716 for(x = x1; x < x2; x++) {
1717 new = term.line[y][x];
1718 if(sel.bx != -1 && *(new.c) && selected(x, y))
1719 new.mode ^= ATTR_REVERSE;
1720 if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
1721 ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
1722 xdraws(buf, base, ox, y, ic, ib);
1723 ic = ib = 0;
1724 }
1725 if(new.state & GLYPH_SET) {
1726 if(ib == 0) {
1727 ox = x;
1728 base = new;
1729 }
1730 sl = utf8size(new.c);
1731 memcpy(buf+ib, new.c, sl);
1732 ib += sl;
1733 ++ic;
1734 }
1735 }
1736 if(ib > 0)
1737 xdraws(buf, base, ox, y, ic, ib);
1738 }
1739 xdrawcursor();
1740 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
1741 }
1742
1743 void
1744 expose(XEvent *ev) {
1745 XExposeEvent *e = &ev->xexpose;
1746 if(xw.state & WIN_REDRAW) {
1747 if(!e->count) {
1748 xw.state &= ~WIN_REDRAW;
1749 draw();
1750 }
1751 } else
1752 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, e->x-BORDER, e->y-BORDER,
1753 e->width, e->height, e->x, e->y);
1754 }
1755
1756 void
1757 visibility(XEvent *ev) {
1758 XVisibilityEvent *e = &ev->xvisibility;
1759 if(e->state == VisibilityFullyObscured)
1760 xw.state &= ~WIN_VISIBLE;
1761 else if(!(xw.state & WIN_VISIBLE))
1762 /* need a full redraw for next Expose, not just a buf copy */
1763 xw.state |= WIN_VISIBLE | WIN_REDRAW;
1764 }
1765
1766 void
1767 unmap(XEvent *ev) {
1768 xw.state &= ~WIN_VISIBLE;
1769 }
1770
1771 void
1772 xseturgency(int add) {
1773 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
1774 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
1775 XSetWMHints(xw.dpy, xw.win, h);
1776 XFree(h);
1777 }
1778
1779 void
1780 focus(XEvent *ev) {
1781 if(ev->type == FocusIn) {
1782 xw.state |= WIN_FOCUSED;
1783 xseturgency(0);
1784 } else
1785 xw.state &= ~WIN_FOCUSED;
1786 draw();
1787 }
1788
1789 char*
1790 kmap(KeySym k, unsigned int state) {
1791 int i;
1792 for(i = 0; i < LEN(key); i++)
1793 if(key[i].k == k && (key[i].mask == 0 || key[i].mask & state))
1794 return (char*)key[i].s;
1795 return NULL;
1796 }
1797
1798 void
1799 kpress(XEvent *ev) {
1800 XKeyEvent *e = &ev->xkey;
1801 KeySym ksym;
1802 char buf[32];
1803 char *customkey;
1804 int len;
1805 int meta;
1806 int shift;
1807 Status status;
1808
1809 meta = e->state & Mod1Mask;
1810 shift = e->state & ShiftMask;
1811 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
1812
1813 /* 1. custom keys from config.h */
1814 if((customkey = kmap(ksym, e->state)))
1815 ttywrite(customkey, strlen(customkey));
1816 /* 2. hardcoded (overrides X lookup) */
1817 else
1818 switch(ksym) {
1819 case XK_Up:
1820 case XK_Down:
1821 case XK_Left:
1822 case XK_Right:
1823 /* XXX: shift up/down doesn't work */
1824 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
1825 ttywrite(buf, 3);
1826 break;
1827 case XK_Insert:
1828 if(shift)
1829 selpaste();
1830 break;
1831 case XK_Return:
1832 if(IS_SET(MODE_CRLF))
1833 ttywrite("\r\n", 2);
1834 else
1835 ttywrite("\r", 1);
1836 break;
1837 /* 3. X lookup */
1838 default:
1839 if(len > 0) {
1840 if(meta && len == 1)
1841 ttywrite("\033", 1);
1842 ttywrite(buf, len);
1843 }
1844 break;
1845 }
1846 }
1847
1848 void
1849 resize(XEvent *e) {
1850 int col, row;
1851
1852 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
1853 return;
1854
1855 xw.w = e->xconfigure.width;
1856 xw.h = e->xconfigure.height;
1857 col = (xw.w - 2*BORDER) / xw.cw;
1858 row = (xw.h - 2*BORDER) / xw.ch;
1859 if(col == term.col && row == term.row)
1860 return;
1861 if(tresize(col, row))
1862 draw();
1863 ttyresize(col, row);
1864 xresize(col, row);
1865 }
1866
1867 void
1868 run(void) {
1869 XEvent ev;
1870 fd_set rfd;
1871 int xfd = XConnectionNumber(xw.dpy);
1872
1873 for(;;) {
1874 FD_ZERO(&rfd);
1875 FD_SET(cmdfd, &rfd);
1876 FD_SET(xfd, &rfd);
1877 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) < 0) {
1878 if(errno == EINTR)
1879 continue;
1880 die("select failed: %s\n", SERRNO);
1881 }
1882 if(FD_ISSET(cmdfd, &rfd)) {
1883 ttyread();
1884 draw();
1885 }
1886 while(XPending(xw.dpy)) {
1887 XNextEvent(xw.dpy, &ev);
1888 if(XFilterEvent(&ev, xw.win))
1889 continue;
1890 if(handler[ev.type])
1891 (handler[ev.type])(&ev);
1892 }
1893 }
1894 }
1895
1896 int
1897 main(int argc, char *argv[]) {
1898 int i;
1899
1900 for(i = 1; i < argc; i++) {
1901 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
1902 case 't':
1903 if(++i < argc) opt_title = argv[i];
1904 break;
1905 case 'c':
1906 if(++i < argc) opt_class = argv[i];
1907 break;
1908 case 'e':
1909 if(++i < argc) opt_cmd = &argv[i];
1910 break;
1911 case 'v':
1912 default:
1913 die(USAGE);
1914 }
1915 /* -e eats every remaining arguments */
1916 if(opt_cmd)
1917 break;
1918 }
1919 setlocale(LC_CTYPE, "");
1920 tnew(80, 24);
1921 ttynew();
1922 xinit();
1923 selinit();
1924 run();
1925 return 0;
1926 }