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Implement italic font support.
[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 <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <sys/ioctl.h>
15 #include <sys/select.h>
16 #include <sys/stat.h>
17 #include <sys/time.h>
18 #include <sys/types.h>
19 #include <sys/wait.h>
20 #include <time.h>
21 #include <unistd.h>
22 #include <X11/Xatom.h>
23 #include <X11/Xlib.h>
24 #include <X11/Xutil.h>
25 #include <X11/cursorfont.h>
26 #include <X11/keysym.h>
27 #include <X11/extensions/Xdbe.h>
28
29 #if defined(__linux)
30 #include <pty.h>
31 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
32 #include <util.h>
33 #elif defined(__FreeBSD__) || defined(__DragonFly__)
34 #include <libutil.h>
35 #endif
36
37 #define USAGE \
38 "st " VERSION " (c) 2010-2012 st engineers\n" \
39 "usage: st [-t title] [-c class] [-g geometry]" \
40 " [-w windowid] [-v] [-f file] [-e command...]\n"
41
42 /* XEMBED messages */
43 #define XEMBED_FOCUS_IN 4
44 #define XEMBED_FOCUS_OUT 5
45
46 /* Arbitrary sizes */
47 #define ESC_BUF_SIZ 256
48 #define ESC_ARG_SIZ 16
49 #define STR_BUF_SIZ 256
50 #define STR_ARG_SIZ 16
51 #define DRAW_BUF_SIZ 1024
52 #define UTF_SIZ 4
53 #define XK_NO_MOD UINT_MAX
54 #define XK_ANY_MOD 0
55
56 #define SELECT_TIMEOUT (20*1000) /* 20 ms */
57 #define DRAW_TIMEOUT (20*1000) /* 20 ms */
58 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
59
60 #define SERRNO strerror(errno)
61 #define MIN(a, b) ((a) < (b) ? (a) : (b))
62 #define MAX(a, b) ((a) < (b) ? (b) : (a))
63 #define LEN(a) (sizeof(a) / sizeof(a[0]))
64 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
65 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
66 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
67 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
68 #define IS_SET(flag) (term.mode & (flag))
69 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
70 #define X2COL(x) (((x) - BORDER)/xw.cw)
71 #define Y2ROW(y) (((y) - BORDER)/xw.ch)
72
73 enum glyph_attribute {
74 ATTR_NULL = 0,
75 ATTR_REVERSE = 1,
76 ATTR_UNDERLINE = 2,
77 ATTR_BOLD = 4,
78 ATTR_GFX = 8,
79 ATTR_ITALIC = 16,
80 };
81
82 enum cursor_movement {
83 CURSOR_UP,
84 CURSOR_DOWN,
85 CURSOR_LEFT,
86 CURSOR_RIGHT,
87 CURSOR_SAVE,
88 CURSOR_LOAD
89 };
90
91 enum cursor_state {
92 CURSOR_DEFAULT = 0,
93 CURSOR_HIDE = 1,
94 CURSOR_WRAPNEXT = 2
95 };
96
97 enum glyph_state {
98 GLYPH_SET = 1,
99 GLYPH_DIRTY = 2
100 };
101
102 enum term_mode {
103 MODE_WRAP = 1,
104 MODE_INSERT = 2,
105 MODE_APPKEYPAD = 4,
106 MODE_ALTSCREEN = 8,
107 MODE_CRLF = 16,
108 MODE_MOUSEBTN = 32,
109 MODE_MOUSEMOTION = 64,
110 MODE_MOUSE = 32|64,
111 MODE_REVERSE = 128
112 };
113
114 enum escape_state {
115 ESC_START = 1,
116 ESC_CSI = 2,
117 ESC_STR = 4, /* DSC, OSC, PM, APC */
118 ESC_ALTCHARSET = 8,
119 ESC_STR_END = 16, /* a final string was encountered */
120 };
121
122 enum window_state {
123 WIN_VISIBLE = 1,
124 WIN_REDRAW = 2,
125 WIN_FOCUSED = 4
126 };
127
128 /* bit macro */
129 #undef B0
130 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
131
132 typedef unsigned char uchar;
133 typedef unsigned int uint;
134 typedef unsigned long ulong;
135 typedef unsigned short ushort;
136
137 typedef struct {
138 char c[UTF_SIZ]; /* character code */
139 uchar mode; /* attribute flags */
140 ushort fg; /* foreground */
141 ushort bg; /* background */
142 uchar state; /* state flags */
143 } Glyph;
144
145 typedef Glyph* Line;
146
147 typedef struct {
148 Glyph attr; /* current char attributes */
149 int x;
150 int y;
151 char state;
152 } TCursor;
153
154 /* CSI Escape sequence structs */
155 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
156 typedef struct {
157 char buf[ESC_BUF_SIZ]; /* raw string */
158 int len; /* raw string length */
159 char priv;
160 int arg[ESC_ARG_SIZ];
161 int narg; /* nb of args */
162 char mode;
163 } CSIEscape;
164
165 /* STR Escape sequence structs */
166 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
167 typedef struct {
168 char type; /* ESC type ... */
169 char buf[STR_BUF_SIZ]; /* raw string */
170 int len; /* raw string length */
171 char *args[STR_ARG_SIZ];
172 int narg; /* nb of args */
173 } STREscape;
174
175 /* Internal representation of the screen */
176 typedef struct {
177 int row; /* nb row */
178 int col; /* nb col */
179 Line* line; /* screen */
180 Line* alt; /* alternate screen */
181 bool* dirty; /* dirtyness of lines */
182 TCursor c; /* cursor */
183 int top; /* top scroll limit */
184 int bot; /* bottom scroll limit */
185 int mode; /* terminal mode flags */
186 int esc; /* escape state flags */
187 bool *tabs;
188 } Term;
189
190 /* Purely graphic info */
191 typedef struct {
192 Display* dpy;
193 Colormap cmap;
194 Window win;
195 XdbeBackBuffer buf;
196 Atom xembed;
197 XIM xim;
198 XIC xic;
199 int scr;
200 Bool isfixed; /* is fixed geometry? */
201 int fx, fy, fw, fh; /* fixed geometry */
202 int w; /* window width */
203 int h; /* window height */
204 int ch; /* char height */
205 int cw; /* char width */
206 char state; /* focus, redraw, visible */
207 struct timeval lastdraw;
208 } XWindow;
209
210 typedef struct {
211 KeySym k;
212 uint mask;
213 char s[ESC_BUF_SIZ];
214 } Key;
215
216
217 /* TODO: use better name for vars... */
218 typedef struct {
219 int mode;
220 int bx, by;
221 int ex, ey;
222 struct {int x, y;} b, e;
223 char *clip;
224 Atom xtarget;
225 bool alt;
226 struct timeval tclick1;
227 struct timeval tclick2;
228 } Selection;
229
230 #include "config.h"
231
232 /* Drawing Context */
233 typedef struct {
234 ulong col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
235 GC gc;
236 struct {
237 int ascent;
238 int descent;
239 short lbearing;
240 short rbearing;
241 XFontSet set;
242 } font, bfont, ifont;
243 } DC;
244
245 static void die(const char*, ...);
246 static void draw(void);
247 static void redraw(void);
248 static void drawregion(int, int, int, int);
249 static void execsh(void);
250 static void sigchld(int);
251 static void run(void);
252 static bool last_draw_too_old(void);
253
254 static void csidump(void);
255 static void csihandle(void);
256 static void csiparse(void);
257 static void csireset(void);
258 static void strdump(void);
259 static void strhandle(void);
260 static void strparse(void);
261 static void strreset(void);
262
263 static void tclearregion(int, int, int, int);
264 static void tcursor(int);
265 static void tdeletechar(int);
266 static void tdeleteline(int);
267 static void tinsertblank(int);
268 static void tinsertblankline(int);
269 static void tmoveto(int, int);
270 static void tnew(int, int);
271 static void tnewline(int);
272 static void tputtab(bool);
273 static void tputc(char*);
274 static void treset(void);
275 static int tresize(int, int);
276 static void tscrollup(int, int);
277 static void tscrolldown(int, int);
278 static void tsetattr(int*, int);
279 static void tsetchar(char*);
280 static void tsetscroll(int, int);
281 static void tswapscreen(void);
282 static void tsetdirt(int, int);
283 static void tsetmode(bool, bool, int *, int);
284 static void tfulldirt(void);
285
286 static void ttynew(void);
287 static void ttyread(void);
288 static void ttyresize(int, int);
289 static void ttywrite(const char *, size_t);
290
291 static void xdraws(char *, Glyph, int, int, int, int);
292 static void xhints(void);
293 static void xclear(int, int, int, int);
294 static void xcopy();
295 static void xdrawcursor(void);
296 static void xinit(void);
297 static void xloadcols(void);
298 static void xseturgency(int);
299 static void xsetsel(char*);
300 static void xresize(int, int);
301
302 static void expose(XEvent *);
303 static void visibility(XEvent *);
304 static void unmap(XEvent *);
305 static char* kmap(KeySym, uint);
306 static void kpress(XEvent *);
307 static void cmessage(XEvent *);
308 static void resize(XEvent *);
309 static void focus(XEvent *);
310 static void brelease(XEvent *);
311 static void bpress(XEvent *);
312 static void bmotion(XEvent *);
313 static void selnotify(XEvent *);
314 static void selrequest(XEvent *);
315
316 static void selinit(void);
317 static inline bool selected(int, int);
318 static void selcopy(void);
319 static void selpaste();
320 static void selscroll(int, int);
321
322 static int utf8decode(char *, long *);
323 static int utf8encode(long *, char *);
324 static int utf8size(char *);
325 static int isfullutf8(char *, int);
326
327 static void (*handler[LASTEvent])(XEvent *) = {
328 [KeyPress] = kpress,
329 [ClientMessage] = cmessage,
330 [ConfigureNotify] = resize,
331 [VisibilityNotify] = visibility,
332 [UnmapNotify] = unmap,
333 [Expose] = expose,
334 [FocusIn] = focus,
335 [FocusOut] = focus,
336 [MotionNotify] = bmotion,
337 [ButtonPress] = bpress,
338 [ButtonRelease] = brelease,
339 [SelectionNotify] = selnotify,
340 [SelectionRequest] = selrequest,
341 };
342
343 /* Globals */
344 static DC dc;
345 static XWindow xw;
346 static Term term;
347 static CSIEscape csiescseq;
348 static STREscape strescseq;
349 static int cmdfd;
350 static pid_t pid;
351 static Selection sel;
352 static FILE *fileio;
353 static char **opt_cmd = NULL;
354 static char *opt_io = NULL;
355 static char *opt_title = NULL;
356 static char *opt_embed = NULL;
357 static char *opt_class = NULL;
358
359 int
360 utf8decode(char *s, long *u) {
361 uchar c;
362 int i, n, rtn;
363
364 rtn = 1;
365 c = *s;
366 if(~c & B7) { /* 0xxxxxxx */
367 *u = c;
368 return rtn;
369 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
370 *u = c&(B4|B3|B2|B1|B0);
371 n = 1;
372 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
373 *u = c&(B3|B2|B1|B0);
374 n = 2;
375 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
376 *u = c & (B2|B1|B0);
377 n = 3;
378 } else
379 goto invalid;
380 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
381 c = *s;
382 if((c & (B7|B6)) != B7) /* 10xxxxxx */
383 goto invalid;
384 *u <<= 6;
385 *u |= c & (B5|B4|B3|B2|B1|B0);
386 }
387 if((n == 1 && *u < 0x80) ||
388 (n == 2 && *u < 0x800) ||
389 (n == 3 && *u < 0x10000) ||
390 (*u >= 0xD800 && *u <= 0xDFFF))
391 goto invalid;
392 return rtn;
393 invalid:
394 *u = 0xFFFD;
395 return rtn;
396 }
397
398 int
399 utf8encode(long *u, char *s) {
400 uchar *sp;
401 ulong uc;
402 int i, n;
403
404 sp = (uchar*) s;
405 uc = *u;
406 if(uc < 0x80) {
407 *sp = uc; /* 0xxxxxxx */
408 return 1;
409 } else if(*u < 0x800) {
410 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
411 n = 1;
412 } else if(uc < 0x10000) {
413 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
414 n = 2;
415 } else if(uc <= 0x10FFFF) {
416 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
417 n = 3;
418 } else {
419 goto invalid;
420 }
421 for(i=n,++sp; i>0; --i,++sp)
422 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
423 return n+1;
424 invalid:
425 /* U+FFFD */
426 *s++ = '\xEF';
427 *s++ = '\xBF';
428 *s = '\xBD';
429 return 3;
430 }
431
432 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
433 UTF-8 otherwise return 0 */
434 int
435 isfullutf8(char *s, int b) {
436 uchar *c1, *c2, *c3;
437
438 c1 = (uchar *) s;
439 c2 = (uchar *) ++s;
440 c3 = (uchar *) ++s;
441 if(b < 1)
442 return 0;
443 else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
444 return 0;
445 else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
446 ((b == 1) ||
447 ((b == 2) && (*c2&(B7|B6)) == B7)))
448 return 0;
449 else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
450 ((b == 1) ||
451 ((b == 2) && (*c2&(B7|B6)) == B7) ||
452 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7)))
453 return 0;
454 else
455 return 1;
456 }
457
458 int
459 utf8size(char *s) {
460 uchar c = *s;
461
462 if(~c&B7)
463 return 1;
464 else if((c&(B7|B6|B5)) == (B7|B6))
465 return 2;
466 else if((c&(B7|B6|B5|B4)) == (B7|B6|B5))
467 return 3;
468 else
469 return 4;
470 }
471
472 void
473 selinit(void) {
474 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
475 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
476 sel.mode = 0;
477 sel.bx = -1;
478 sel.clip = NULL;
479 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
480 if(sel.xtarget == None)
481 sel.xtarget = XA_STRING;
482 }
483
484 static inline bool
485 selected(int x, int y) {
486 if(sel.ey == y && sel.by == y) {
487 int bx = MIN(sel.bx, sel.ex);
488 int ex = MAX(sel.bx, sel.ex);
489 return BETWEEN(x, bx, ex);
490 }
491 return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
492 || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
493 }
494
495 void
496 getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
497 if(b)
498 *b = e->xbutton.button;
499
500 *x = X2COL(e->xbutton.x);
501 *y = Y2ROW(e->xbutton.y);
502 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
503 sel.b.y = MIN(sel.by, sel.ey);
504 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
505 sel.e.y = MAX(sel.by, sel.ey);
506 }
507
508 void
509 mousereport(XEvent *e) {
510 int x = X2COL(e->xbutton.x);
511 int y = Y2ROW(e->xbutton.y);
512 int button = e->xbutton.button;
513 int state = e->xbutton.state;
514 char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
515 static int ob, ox, oy;
516
517 /* from urxvt */
518 if(e->xbutton.type == MotionNotify) {
519 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
520 return;
521 button = ob + 32;
522 ox = x, oy = y;
523 } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
524 button = 3;
525 } else {
526 button -= Button1;
527 if(button >= 3)
528 button += 64 - 3;
529 if(e->xbutton.type == ButtonPress) {
530 ob = button;
531 ox = x, oy = y;
532 }
533 }
534
535 buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
536 + (state & Mod4Mask ? 8 : 0)
537 + (state & ControlMask ? 16 : 0);
538
539 ttywrite(buf, sizeof(buf));
540 }
541
542 void
543 bpress(XEvent *e) {
544 if(IS_SET(MODE_MOUSE))
545 mousereport(e);
546 else if(e->xbutton.button == Button1) {
547 if(sel.bx != -1)
548 tsetdirt(sel.b.y, sel.e.y);
549 sel.mode = 1;
550 sel.ex = sel.bx = X2COL(e->xbutton.x);
551 sel.ey = sel.by = Y2ROW(e->xbutton.y);
552 }
553 }
554
555 void
556 selcopy(void) {
557 char *str, *ptr;
558 int x, y, bufsize, is_selected = 0;
559
560 if(sel.bx == -1)
561 str = NULL;
562
563 else {
564 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
565 ptr = str = malloc(bufsize);
566
567 /* append every set & selected glyph to the selection */
568 for(y = 0; y < term.row; y++) {
569 for(x = 0; x < term.col; x++) {
570 is_selected = selected(x, y);
571 if((term.line[y][x].state & GLYPH_SET) && is_selected) {
572 int size = utf8size(term.line[y][x].c);
573 memcpy(ptr, term.line[y][x].c, size);
574 ptr += size;
575 }
576 }
577
578 /* \n at the end of every selected line except for the last one */
579 if(is_selected && y < sel.e.y)
580 *ptr++ = '\n';
581 }
582 *ptr = 0;
583 }
584 sel.alt = IS_SET(MODE_ALTSCREEN);
585 xsetsel(str);
586 }
587
588 void
589 selnotify(XEvent *e) {
590 ulong nitems, ofs, rem;
591 int format;
592 uchar *data;
593 Atom type;
594
595 ofs = 0;
596 do {
597 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
598 False, AnyPropertyType, &type, &format,
599 &nitems, &rem, &data)) {
600 fprintf(stderr, "Clipboard allocation failed\n");
601 return;
602 }
603 ttywrite((const char *) data, nitems * format / 8);
604 XFree(data);
605 /* number of 32-bit chunks returned */
606 ofs += nitems * format / 32;
607 } while(rem > 0);
608 }
609
610 void
611 selpaste() {
612 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY, xw.win, CurrentTime);
613 }
614
615 void
616 selrequest(XEvent *e) {
617 XSelectionRequestEvent *xsre;
618 XSelectionEvent xev;
619 Atom xa_targets;
620
621 xsre = (XSelectionRequestEvent *) e;
622 xev.type = SelectionNotify;
623 xev.requestor = xsre->requestor;
624 xev.selection = xsre->selection;
625 xev.target = xsre->target;
626 xev.time = xsre->time;
627 /* reject */
628 xev.property = None;
629
630 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
631 if(xsre->target == xa_targets) {
632 /* respond with the supported type */
633 Atom string = sel.xtarget;
634 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
635 XA_ATOM, 32, PropModeReplace,
636 (uchar *) &string, 1);
637 xev.property = xsre->property;
638 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
639 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
640 xsre->target, 8, PropModeReplace,
641 (uchar *) sel.clip, strlen(sel.clip));
642 xev.property = xsre->property;
643 }
644
645 /* all done, send a notification to the listener */
646 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
647 fprintf(stderr, "Error sending SelectionNotify event\n");
648 }
649
650 void
651 xsetsel(char *str) {
652 /* register the selection for both the clipboard and the primary */
653 Atom clipboard;
654
655 free(sel.clip);
656 sel.clip = str;
657
658 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
659
660 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
661 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
662
663 XFlush(xw.dpy);
664 }
665
666 void
667 brelease(XEvent *e) {
668 if(IS_SET(MODE_MOUSE)) {
669 mousereport(e);
670 return;
671 }
672 if(e->xbutton.button == Button2)
673 selpaste();
674 else if(e->xbutton.button == Button1) {
675 sel.mode = 0;
676 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
677 term.dirty[sel.ey] = 1;
678 if(sel.bx == sel.ex && sel.by == sel.ey) {
679 struct timeval now;
680 sel.bx = -1;
681 gettimeofday(&now, NULL);
682
683 if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
684 /* triple click on the line */
685 sel.b.x = sel.bx = 0;
686 sel.e.x = sel.ex = term.col;
687 sel.b.y = sel.e.y = sel.ey;
688 selcopy();
689 } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
690 /* double click to select word */
691 sel.bx = sel.ex;
692 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
693 term.line[sel.ey][sel.bx-1].c[0] != ' ') sel.bx--;
694 sel.b.x = sel.bx;
695 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
696 term.line[sel.ey][sel.ex+1].c[0] != ' ') sel.ex++;
697 sel.e.x = sel.ex;
698 sel.b.y = sel.e.y = sel.ey;
699 selcopy();
700 }
701 } else
702 selcopy();
703 }
704 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
705 gettimeofday(&sel.tclick1, NULL);
706 draw();
707 }
708
709 void
710 bmotion(XEvent *e) {
711 if(IS_SET(MODE_MOUSE)) {
712 mousereport(e);
713 return;
714 }
715 if(sel.mode) {
716 int oldey = sel.ey, oldex = sel.ex;
717 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
718
719 if(oldey != sel.ey || oldex != sel.ex) {
720 int starty = MIN(oldey, sel.ey);
721 int endy = MAX(oldey, sel.ey);
722 tsetdirt(starty, endy);
723 draw();
724 }
725 }
726 }
727
728 void
729 die(const char *errstr, ...) {
730 va_list ap;
731
732 va_start(ap, errstr);
733 vfprintf(stderr, errstr, ap);
734 va_end(ap);
735 exit(EXIT_FAILURE);
736 }
737
738 void
739 execsh(void) {
740 char **args;
741 char *envshell = getenv("SHELL");
742
743 unsetenv("COLUMNS");
744 unsetenv("LINES");
745 unsetenv("TERMCAP");
746
747 DEFAULT(envshell, SHELL);
748 putenv("TERM="TNAME);
749 args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
750 execvp(args[0], args);
751 exit(EXIT_FAILURE);
752 }
753
754 void
755 sigchld(int a) {
756 int stat = 0;
757 if(waitpid(pid, &stat, 0) < 0)
758 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
759 if(WIFEXITED(stat))
760 exit(WEXITSTATUS(stat));
761 else
762 exit(EXIT_FAILURE);
763 }
764
765 void
766 ttynew(void) {
767 int m, s;
768
769 /* seems to work fine on linux, openbsd and freebsd */
770 struct winsize w = {term.row, term.col, 0, 0};
771 if(openpty(&m, &s, NULL, NULL, &w) < 0)
772 die("openpty failed: %s\n", SERRNO);
773
774 switch(pid = fork()) {
775 case -1:
776 die("fork failed\n");
777 break;
778 case 0:
779 setsid(); /* create a new process group */
780 dup2(s, STDIN_FILENO);
781 dup2(s, STDOUT_FILENO);
782 dup2(s, STDERR_FILENO);
783 if(ioctl(s, TIOCSCTTY, NULL) < 0)
784 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
785 close(s);
786 close(m);
787 execsh();
788 break;
789 default:
790 close(s);
791 cmdfd = m;
792 signal(SIGCHLD, sigchld);
793 if(opt_io && !(fileio = fopen(opt_io, "w"))) {
794 fprintf(stderr, "Error opening %s:%s\n",
795 opt_io, strerror(errno));
796 }
797 }
798 }
799
800 void
801 dump(char c) {
802 static int col;
803 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
804 if(++col % 10 == 0)
805 fprintf(stderr, "\n");
806 }
807
808 void
809 ttyread(void) {
810 static char buf[BUFSIZ];
811 static int buflen = 0;
812 char *ptr;
813 char s[UTF_SIZ];
814 int charsize; /* size of utf8 char in bytes */
815 long utf8c;
816 int ret;
817
818 /* append read bytes to unprocessed bytes */
819 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
820 die("Couldn't read from shell: %s\n", SERRNO);
821
822 /* process every complete utf8 char */
823 buflen += ret;
824 ptr = buf;
825 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
826 charsize = utf8decode(ptr, &utf8c);
827 utf8encode(&utf8c, s);
828 tputc(s);
829 ptr += charsize;
830 buflen -= charsize;
831 }
832
833 /* keep any uncomplete utf8 char for the next call */
834 memmove(buf, ptr, buflen);
835 }
836
837 void
838 ttywrite(const char *s, size_t n) {
839 if(write(cmdfd, s, n) == -1)
840 die("write error on tty: %s\n", SERRNO);
841 }
842
843 void
844 ttyresize(int x, int y) {
845 struct winsize w;
846
847 w.ws_row = term.row;
848 w.ws_col = term.col;
849 w.ws_xpixel = xw.w;
850 w.ws_ypixel = xw.h;
851 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
852 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
853 }
854
855 void
856 tsetdirt(int top, int bot)
857 {
858 int i;
859
860 LIMIT(top, 0, term.row-1);
861 LIMIT(bot, 0, term.row-1);
862
863 for(i = top; i <= bot; i++)
864 term.dirty[i] = 1;
865 }
866
867 void
868 tfulldirt(void)
869 {
870 tsetdirt(0, term.row-1);
871 }
872
873 void
874 tcursor(int mode) {
875 static TCursor c;
876
877 if(mode == CURSOR_SAVE)
878 c = term.c;
879 else if(mode == CURSOR_LOAD)
880 term.c = c, tmoveto(c.x, c.y);
881 }
882
883 void
884 treset(void) {
885 unsigned i;
886 term.c = (TCursor){{
887 .mode = ATTR_NULL,
888 .fg = DefaultFG,
889 .bg = DefaultBG
890 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
891
892 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
893 for(i = TAB; i < term.col; i += TAB)
894 term.tabs[i] = 1;
895 term.top = 0, term.bot = term.row - 1;
896 term.mode = MODE_WRAP;
897 tclearregion(0, 0, term.col-1, term.row-1);
898 }
899
900 void
901 tnew(int col, int row) {
902 /* set screen size */
903 term.row = row, term.col = col;
904 term.line = malloc(term.row * sizeof(Line));
905 term.alt = malloc(term.row * sizeof(Line));
906 term.dirty = malloc(term.row * sizeof(*term.dirty));
907 term.tabs = malloc(term.col * sizeof(*term.tabs));
908
909 for(row = 0; row < term.row; row++) {
910 term.line[row] = malloc(term.col * sizeof(Glyph));
911 term.alt [row] = malloc(term.col * sizeof(Glyph));
912 term.dirty[row] = 0;
913 }
914 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
915 /* setup screen */
916 treset();
917 }
918
919 void
920 tswapscreen(void) {
921 Line* tmp = term.line;
922 term.line = term.alt;
923 term.alt = tmp;
924 term.mode ^= MODE_ALTSCREEN;
925 tfulldirt();
926 }
927
928 void
929 tscrolldown(int orig, int n) {
930 int i;
931 Line temp;
932
933 LIMIT(n, 0, term.bot-orig+1);
934
935 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
936
937 for(i = term.bot; i >= orig+n; i--) {
938 temp = term.line[i];
939 term.line[i] = term.line[i-n];
940 term.line[i-n] = temp;
941
942 term.dirty[i] = 1;
943 term.dirty[i-n] = 1;
944 }
945
946 selscroll(orig, n);
947 }
948
949 void
950 tscrollup(int orig, int n) {
951 int i;
952 Line temp;
953 LIMIT(n, 0, term.bot-orig+1);
954
955 tclearregion(0, orig, term.col-1, orig+n-1);
956
957 for(i = orig; i <= term.bot-n; i++) {
958 temp = term.line[i];
959 term.line[i] = term.line[i+n];
960 term.line[i+n] = temp;
961
962 term.dirty[i] = 1;
963 term.dirty[i+n] = 1;
964 }
965
966 selscroll(orig, -n);
967 }
968
969 void
970 selscroll(int orig, int n) {
971 if(sel.bx == -1)
972 return;
973
974 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
975 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
976 sel.bx = -1;
977 return;
978 }
979 if(sel.by < term.top) {
980 sel.by = term.top;
981 sel.bx = 0;
982 }
983 if(sel.ey > term.bot) {
984 sel.ey = term.bot;
985 sel.ex = term.col;
986 }
987 sel.b.y = sel.by, sel.b.x = sel.bx;
988 sel.e.y = sel.ey, sel.e.x = sel.ex;
989 }
990 }
991
992 void
993 tnewline(int first_col) {
994 int y = term.c.y;
995 if(y == term.bot)
996 tscrollup(term.top, 1);
997 else
998 y++;
999 tmoveto(first_col ? 0 : term.c.x, y);
1000 }
1001
1002 void
1003 csiparse(void) {
1004 /* int noarg = 1; */
1005 char *p = csiescseq.buf;
1006
1007 csiescseq.narg = 0;
1008 if(*p == '?')
1009 csiescseq.priv = 1, p++;
1010
1011 while(p < csiescseq.buf+csiescseq.len) {
1012 while(isdigit(*p)) {
1013 csiescseq.arg[csiescseq.narg] *= 10;
1014 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1015 }
1016 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ)
1017 csiescseq.narg++, p++;
1018 else {
1019 csiescseq.mode = *p;
1020 csiescseq.narg++;
1021 return;
1022 }
1023 }
1024 }
1025
1026 void
1027 tmoveto(int x, int y) {
1028 LIMIT(x, 0, term.col-1);
1029 LIMIT(y, 0, term.row-1);
1030 term.c.state &= ~CURSOR_WRAPNEXT;
1031 term.c.x = x;
1032 term.c.y = y;
1033 }
1034
1035 void
1036 tsetchar(char *c) {
1037 term.dirty[term.c.y] = 1;
1038 term.line[term.c.y][term.c.x] = term.c.attr;
1039 memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
1040 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
1041 }
1042
1043 void
1044 tclearregion(int x1, int y1, int x2, int y2) {
1045 int x, y, temp;
1046
1047 if(x1 > x2)
1048 temp = x1, x1 = x2, x2 = temp;
1049 if(y1 > y2)
1050 temp = y1, y1 = y2, y2 = temp;
1051
1052 LIMIT(x1, 0, term.col-1);
1053 LIMIT(x2, 0, term.col-1);
1054 LIMIT(y1, 0, term.row-1);
1055 LIMIT(y2, 0, term.row-1);
1056
1057 for(y = y1; y <= y2; y++) {
1058 term.dirty[y] = 1;
1059 for(x = x1; x <= x2; x++)
1060 term.line[y][x].state = 0;
1061 }
1062 }
1063
1064 void
1065 tdeletechar(int n) {
1066 int src = term.c.x + n;
1067 int dst = term.c.x;
1068 int size = term.col - src;
1069
1070 term.dirty[term.c.y] = 1;
1071
1072 if(src >= term.col) {
1073 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1074 return;
1075 }
1076 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1077 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1078 }
1079
1080 void
1081 tinsertblank(int n) {
1082 int src = term.c.x;
1083 int dst = src + n;
1084 int size = term.col - dst;
1085
1086 term.dirty[term.c.y] = 1;
1087
1088 if(dst >= term.col) {
1089 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1090 return;
1091 }
1092 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1093 tclearregion(src, term.c.y, dst - 1, term.c.y);
1094 }
1095
1096 void
1097 tinsertblankline(int n) {
1098 if(term.c.y < term.top || term.c.y > term.bot)
1099 return;
1100
1101 tscrolldown(term.c.y, n);
1102 }
1103
1104 void
1105 tdeleteline(int n) {
1106 if(term.c.y < term.top || term.c.y > term.bot)
1107 return;
1108
1109 tscrollup(term.c.y, n);
1110 }
1111
1112 void
1113 tsetattr(int *attr, int l) {
1114 int i;
1115
1116 for(i = 0; i < l; i++) {
1117 switch(attr[i]) {
1118 case 0:
1119 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
1120 term.c.attr.fg = DefaultFG;
1121 term.c.attr.bg = DefaultBG;
1122 break;
1123 case 1:
1124 term.c.attr.mode |= ATTR_BOLD;
1125 break;
1126 case 3: /* enter standout (highlight) */
1127 term.c.attr.mode |= ATTR_ITALIC;
1128 break;
1129 case 4:
1130 term.c.attr.mode |= ATTR_UNDERLINE;
1131 break;
1132 case 7:
1133 term.c.attr.mode |= ATTR_REVERSE;
1134 break;
1135 case 22:
1136 term.c.attr.mode &= ~ATTR_BOLD;
1137 break;
1138 case 23: /* leave standout (highlight) mode */
1139 term.c.attr.mode &= ~ATTR_ITALIC;
1140 break;
1141 case 24:
1142 term.c.attr.mode &= ~ATTR_UNDERLINE;
1143 break;
1144 case 27:
1145 term.c.attr.mode &= ~ATTR_REVERSE;
1146 break;
1147 case 38:
1148 if(i + 2 < l && attr[i + 1] == 5) {
1149 i += 2;
1150 if(BETWEEN(attr[i], 0, 255))
1151 term.c.attr.fg = attr[i];
1152 else
1153 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
1154 }
1155 else
1156 fprintf(stderr, "erresc(38): gfx attr %d unknown\n", attr[i]);
1157 break;
1158 case 39:
1159 term.c.attr.fg = DefaultFG;
1160 break;
1161 case 48:
1162 if(i + 2 < l && attr[i + 1] == 5) {
1163 i += 2;
1164 if(BETWEEN(attr[i], 0, 255))
1165 term.c.attr.bg = attr[i];
1166 else
1167 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
1168 }
1169 else
1170 fprintf(stderr, "erresc(48): gfx attr %d unknown\n", attr[i]);
1171 break;
1172 case 49:
1173 term.c.attr.bg = DefaultBG;
1174 break;
1175 default:
1176 if(BETWEEN(attr[i], 30, 37))
1177 term.c.attr.fg = attr[i] - 30;
1178 else if(BETWEEN(attr[i], 40, 47))
1179 term.c.attr.bg = attr[i] - 40;
1180 else if(BETWEEN(attr[i], 90, 97))
1181 term.c.attr.fg = attr[i] - 90 + 8;
1182 else if(BETWEEN(attr[i], 100, 107))
1183 term.c.attr.fg = attr[i] - 100 + 8;
1184 else
1185 fprintf(stderr, "erresc(default): gfx attr %d unknown\n", attr[i]), csidump();
1186 break;
1187 }
1188 }
1189 }
1190
1191 void
1192 tsetscroll(int t, int b) {
1193 int temp;
1194
1195 LIMIT(t, 0, term.row-1);
1196 LIMIT(b, 0, term.row-1);
1197 if(t > b) {
1198 temp = t;
1199 t = b;
1200 b = temp;
1201 }
1202 term.top = t;
1203 term.bot = b;
1204 }
1205
1206 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1207
1208 void
1209 tsetmode(bool priv, bool set, int *args, int narg) {
1210 int *lim, mode;
1211
1212 for(lim = args + narg; args < lim; ++args) {
1213 if(priv) {
1214 switch(*args) {
1215 case 1:
1216 MODBIT(term.mode, set, MODE_APPKEYPAD);
1217 break;
1218 case 5: /* DECSCNM -- Reverve video */
1219 mode = term.mode;
1220 MODBIT(term.mode,set, MODE_REVERSE);
1221 if(mode != term.mode)
1222 redraw();
1223 break;
1224 case 7:
1225 MODBIT(term.mode, set, MODE_WRAP);
1226 break;
1227 case 20:
1228 MODBIT(term.mode, set, MODE_CRLF);
1229 break;
1230 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1231 break;
1232 case 25:
1233 MODBIT(term.c.state, !set, CURSOR_HIDE);
1234 break;
1235 case 1000: /* 1000,1002: enable xterm mouse report */
1236 MODBIT(term.mode, set, MODE_MOUSEBTN);
1237 break;
1238 case 1002:
1239 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1240 break;
1241 case 1049: /* = 1047 and 1048 */
1242 case 47:
1243 case 1047:
1244 if(IS_SET(MODE_ALTSCREEN))
1245 tclearregion(0, 0, term.col-1, term.row-1);
1246 if((set && !IS_SET(MODE_ALTSCREEN)) ||
1247 (!set && IS_SET(MODE_ALTSCREEN))) {
1248 tswapscreen();
1249 }
1250 if(*args != 1049)
1251 break;
1252 /* pass through */
1253 case 1048:
1254 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1255 break;
1256 default:
1257 fprintf(stderr,
1258 "erresc: unknown private set/reset mode %d\n",
1259 *args);
1260 break;
1261 }
1262 } else {
1263 switch(*args) {
1264 case 4:
1265 MODBIT(term.mode, set, MODE_INSERT);
1266 break;
1267 default:
1268 fprintf(stderr,
1269 "erresc: unknown set/reset mode %d\n",
1270 *args);
1271 break;
1272 }
1273 }
1274 }
1275 }
1276 #undef MODBIT
1277
1278
1279 void
1280 csihandle(void) {
1281 switch(csiescseq.mode) {
1282 default:
1283 unknown:
1284 fprintf(stderr, "erresc: unknown csi ");
1285 csidump();
1286 /* die(""); */
1287 break;
1288 case '@': /* ICH -- Insert <n> blank char */
1289 DEFAULT(csiescseq.arg[0], 1);
1290 tinsertblank(csiescseq.arg[0]);
1291 break;
1292 case 'A': /* CUU -- Cursor <n> Up */
1293 case 'e':
1294 DEFAULT(csiescseq.arg[0], 1);
1295 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1296 break;
1297 case 'B': /* CUD -- Cursor <n> Down */
1298 DEFAULT(csiescseq.arg[0], 1);
1299 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1300 break;
1301 case 'C': /* CUF -- Cursor <n> Forward */
1302 case 'a':
1303 DEFAULT(csiescseq.arg[0], 1);
1304 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1305 break;
1306 case 'D': /* CUB -- Cursor <n> Backward */
1307 DEFAULT(csiescseq.arg[0], 1);
1308 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1309 break;
1310 case 'E': /* CNL -- Cursor <n> Down and first col */
1311 DEFAULT(csiescseq.arg[0], 1);
1312 tmoveto(0, term.c.y+csiescseq.arg[0]);
1313 break;
1314 case 'F': /* CPL -- Cursor <n> Up and first col */
1315 DEFAULT(csiescseq.arg[0], 1);
1316 tmoveto(0, term.c.y-csiescseq.arg[0]);
1317 break;
1318 case 'g': /* TBC -- Tabulation clear */
1319 switch (csiescseq.arg[0]) {
1320 case 0: /* clear current tab stop */
1321 term.tabs[term.c.x] = 0;
1322 break;
1323 case 3: /* clear all the tabs */
1324 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1325 break;
1326 default:
1327 goto unknown;
1328 }
1329 break;
1330 case 'G': /* CHA -- Move to <col> */
1331 case '`': /* HPA */
1332 DEFAULT(csiescseq.arg[0], 1);
1333 tmoveto(csiescseq.arg[0]-1, term.c.y);
1334 break;
1335 case 'H': /* CUP -- Move to <row> <col> */
1336 case 'f': /* HVP */
1337 DEFAULT(csiescseq.arg[0], 1);
1338 DEFAULT(csiescseq.arg[1], 1);
1339 tmoveto(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1340 break;
1341 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1342 DEFAULT(csiescseq.arg[0], 1);
1343 while(csiescseq.arg[0]--)
1344 tputtab(1);
1345 break;
1346 case 'J': /* ED -- Clear screen */
1347 sel.bx = -1;
1348 switch(csiescseq.arg[0]) {
1349 case 0: /* below */
1350 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1351 if(term.c.y < term.row-1)
1352 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1353 break;
1354 case 1: /* above */
1355 if(term.c.y > 1)
1356 tclearregion(0, 0, term.col-1, term.c.y-1);
1357 tclearregion(0, term.c.y, term.c.x, term.c.y);
1358 break;
1359 case 2: /* all */
1360 tclearregion(0, 0, term.col-1, term.row-1);
1361 break;
1362 default:
1363 goto unknown;
1364 }
1365 break;
1366 case 'K': /* EL -- Clear line */
1367 switch(csiescseq.arg[0]) {
1368 case 0: /* right */
1369 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1370 break;
1371 case 1: /* left */
1372 tclearregion(0, term.c.y, term.c.x, term.c.y);
1373 break;
1374 case 2: /* all */
1375 tclearregion(0, term.c.y, term.col-1, term.c.y);
1376 break;
1377 }
1378 break;
1379 case 'S': /* SU -- Scroll <n> line up */
1380 DEFAULT(csiescseq.arg[0], 1);
1381 tscrollup(term.top, csiescseq.arg[0]);
1382 break;
1383 case 'T': /* SD -- Scroll <n> line down */
1384 DEFAULT(csiescseq.arg[0], 1);
1385 tscrolldown(term.top, csiescseq.arg[0]);
1386 break;
1387 case 'L': /* IL -- Insert <n> blank lines */
1388 DEFAULT(csiescseq.arg[0], 1);
1389 tinsertblankline(csiescseq.arg[0]);
1390 break;
1391 case 'l': /* RM -- Reset Mode */
1392 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1393 break;
1394 case 'M': /* DL -- Delete <n> lines */
1395 DEFAULT(csiescseq.arg[0], 1);
1396 tdeleteline(csiescseq.arg[0]);
1397 break;
1398 case 'X': /* ECH -- Erase <n> char */
1399 DEFAULT(csiescseq.arg[0], 1);
1400 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
1401 break;
1402 case 'P': /* DCH -- Delete <n> char */
1403 DEFAULT(csiescseq.arg[0], 1);
1404 tdeletechar(csiescseq.arg[0]);
1405 break;
1406 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1407 DEFAULT(csiescseq.arg[0], 1);
1408 while(csiescseq.arg[0]--)
1409 tputtab(0);
1410 break;
1411 case 'd': /* VPA -- Move to <row> */
1412 DEFAULT(csiescseq.arg[0], 1);
1413 tmoveto(term.c.x, csiescseq.arg[0]-1);
1414 break;
1415 case 'h': /* SM -- Set terminal mode */
1416 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1417 break;
1418 case 'm': /* SGR -- Terminal attribute (color) */
1419 tsetattr(csiescseq.arg, csiescseq.narg);
1420 break;
1421 case 'r': /* DECSTBM -- Set Scrolling Region */
1422 if(csiescseq.priv)
1423 goto unknown;
1424 else {
1425 DEFAULT(csiescseq.arg[0], 1);
1426 DEFAULT(csiescseq.arg[1], term.row);
1427 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1428 tmoveto(0, 0);
1429 }
1430 break;
1431 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1432 tcursor(CURSOR_SAVE);
1433 break;
1434 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1435 tcursor(CURSOR_LOAD);
1436 break;
1437 }
1438 }
1439
1440 void
1441 csidump(void) {
1442 int i;
1443 printf("ESC[");
1444 for(i = 0; i < csiescseq.len; i++) {
1445 uint c = csiescseq.buf[i] & 0xff;
1446 if(isprint(c)) putchar(c);
1447 else if(c == '\n') printf("(\\n)");
1448 else if(c == '\r') printf("(\\r)");
1449 else if(c == 0x1b) printf("(\\e)");
1450 else printf("(%02x)", c);
1451 }
1452 putchar('\n');
1453 }
1454
1455 void
1456 csireset(void) {
1457 memset(&csiescseq, 0, sizeof(csiescseq));
1458 }
1459
1460 void
1461 strhandle(void) {
1462 char *p;
1463
1464 /*
1465 * TODO: make this being useful in case of color palette change.
1466 */
1467 strparse();
1468
1469 p = strescseq.buf;
1470
1471 switch(strescseq.type) {
1472 case ']': /* OSC -- Operating System Command */
1473 switch(p[0]) {
1474 case '0':
1475 case '1':
1476 case '2':
1477 /*
1478 * TODO: Handle special chars in string, like umlauts.
1479 */
1480 if(p[1] == ';') {
1481 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1482 }
1483 break;
1484 case ';':
1485 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1486 break;
1487 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1488 break;
1489 default:
1490 fprintf(stderr, "erresc: unknown str ");
1491 strdump();
1492 break;
1493 }
1494 break;
1495 case 'P': /* DSC -- Device Control String */
1496 case '_': /* APC -- Application Program Command */
1497 case '^': /* PM -- Privacy Message */
1498 default:
1499 fprintf(stderr, "erresc: unknown str ");
1500 strdump();
1501 /* die(""); */
1502 break;
1503 }
1504 }
1505
1506 void
1507 strparse(void) {
1508 /*
1509 * TODO: Implement parsing like for CSI when required.
1510 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1511 */
1512 return;
1513 }
1514
1515 void
1516 strdump(void) {
1517 int i;
1518 printf("ESC%c", strescseq.type);
1519 for(i = 0; i < strescseq.len; i++) {
1520 uint c = strescseq.buf[i] & 0xff;
1521 if(isprint(c)) putchar(c);
1522 else if(c == '\n') printf("(\\n)");
1523 else if(c == '\r') printf("(\\r)");
1524 else if(c == 0x1b) printf("(\\e)");
1525 else printf("(%02x)", c);
1526 }
1527 printf("ESC\\\n");
1528 }
1529
1530 void
1531 strreset(void) {
1532 memset(&strescseq, 0, sizeof(strescseq));
1533 }
1534
1535 void
1536 tputtab(bool forward) {
1537 unsigned x = term.c.x;
1538
1539 if(forward) {
1540 if(x == term.col)
1541 return;
1542 for(++x; x < term.col && !term.tabs[x]; ++x)
1543 /* nothing */ ;
1544 } else {
1545 if(x == 0)
1546 return;
1547 for(--x; x > 0 && !term.tabs[x]; --x)
1548 /* nothing */ ;
1549 }
1550 tmoveto(x, term.c.y);
1551 }
1552
1553 void
1554 tputc(char *c) {
1555 char ascii = *c;
1556
1557 if(fileio)
1558 putc(ascii, fileio);
1559
1560 if(term.esc & ESC_START) {
1561 if(term.esc & ESC_CSI) {
1562 csiescseq.buf[csiescseq.len++] = ascii;
1563 if(BETWEEN(ascii, 0x40, 0x7E) || csiescseq.len >= ESC_BUF_SIZ) {
1564 term.esc = 0;
1565 csiparse(), csihandle();
1566 }
1567 } else if(term.esc & ESC_STR) {
1568 switch(ascii) {
1569 case '\033':
1570 term.esc = ESC_START | ESC_STR_END;
1571 break;
1572 case '\a': /* backwards compatibility to xterm */
1573 term.esc = 0;
1574 strhandle();
1575 break;
1576 default:
1577 strescseq.buf[strescseq.len++] = ascii;
1578 if(strescseq.len+1 >= STR_BUF_SIZ) {
1579 term.esc = 0;
1580 strhandle();
1581 }
1582 }
1583 } else if(term.esc & ESC_STR_END) {
1584 term.esc = 0;
1585 if(ascii == '\\')
1586 strhandle();
1587 } else if(term.esc & ESC_ALTCHARSET) {
1588 switch(ascii) {
1589 case '0': /* Line drawing crap */
1590 term.c.attr.mode |= ATTR_GFX;
1591 break;
1592 case 'B': /* Back to regular text */
1593 term.c.attr.mode &= ~ATTR_GFX;
1594 break;
1595 default:
1596 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1597 }
1598 term.esc = 0;
1599 } else {
1600 switch(ascii) {
1601 case '[':
1602 term.esc |= ESC_CSI;
1603 break;
1604 case 'P': /* DCS -- Device Control String */
1605 case '_': /* APC -- Application Program Command */
1606 case '^': /* PM -- Privacy Message */
1607 case ']': /* OSC -- Operating System Command */
1608 strreset();
1609 strescseq.type = ascii;
1610 term.esc |= ESC_STR;
1611 break;
1612 case '(':
1613 term.esc |= ESC_ALTCHARSET;
1614 break;
1615 case 'D': /* IND -- Linefeed */
1616 if(term.c.y == term.bot)
1617 tscrollup(term.top, 1);
1618 else
1619 tmoveto(term.c.x, term.c.y+1);
1620 term.esc = 0;
1621 break;
1622 case 'E': /* NEL -- Next line */
1623 tnewline(1); /* always go to first col */
1624 term.esc = 0;
1625 break;
1626 case 'H': /* HTS -- Horizontal tab stop */
1627 term.tabs[term.c.x] = 1;
1628 term.esc = 0;
1629 break;
1630 case 'M': /* RI -- Reverse index */
1631 if(term.c.y == term.top)
1632 tscrolldown(term.top, 1);
1633 else
1634 tmoveto(term.c.x, term.c.y-1);
1635 term.esc = 0;
1636 break;
1637 case 'c': /* RIS -- Reset to inital state */
1638 treset();
1639 term.esc = 0;
1640 break;
1641 case '=': /* DECPAM -- Application keypad */
1642 term.mode |= MODE_APPKEYPAD;
1643 term.esc = 0;
1644 break;
1645 case '>': /* DECPNM -- Normal keypad */
1646 term.mode &= ~MODE_APPKEYPAD;
1647 term.esc = 0;
1648 break;
1649 case '7': /* DECSC -- Save Cursor */
1650 tcursor(CURSOR_SAVE);
1651 term.esc = 0;
1652 break;
1653 case '8': /* DECRC -- Restore Cursor */
1654 tcursor(CURSOR_LOAD);
1655 term.esc = 0;
1656 break;
1657 case '\\': /* ST -- Stop */
1658 term.esc = 0;
1659 break;
1660 default:
1661 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
1662 (uchar) ascii, isprint(ascii)?ascii:'.');
1663 term.esc = 0;
1664 }
1665 }
1666 } else {
1667 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
1668 sel.bx = -1;
1669 switch(ascii) {
1670 case '\t':
1671 tputtab(1);
1672 break;
1673 case '\b':
1674 tmoveto(term.c.x-1, term.c.y);
1675 break;
1676 case '\r':
1677 tmoveto(0, term.c.y);
1678 break;
1679 case '\f':
1680 case '\v':
1681 case '\n':
1682 /* go to first col if the mode is set */
1683 tnewline(IS_SET(MODE_CRLF));
1684 break;
1685 case '\a':
1686 if(!(xw.state & WIN_FOCUSED))
1687 xseturgency(1);
1688 break;
1689 case '\033':
1690 csireset();
1691 term.esc = ESC_START;
1692 break;
1693 default:
1694 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1695 tnewline(1); /* always go to first col */
1696 tsetchar(c);
1697 if(term.c.x+1 < term.col)
1698 tmoveto(term.c.x+1, term.c.y);
1699 else
1700 term.c.state |= CURSOR_WRAPNEXT;
1701 }
1702 }
1703 }
1704
1705 int
1706 tresize(int col, int row) {
1707 int i, x;
1708 int minrow = MIN(row, term.row);
1709 int mincol = MIN(col, term.col);
1710 int slide = term.c.y - row + 1;
1711
1712 if(col < 1 || row < 1)
1713 return 0;
1714
1715 /* free unneeded rows */
1716 i = 0;
1717 if(slide > 0) {
1718 /* slide screen to keep cursor where we expect it -
1719 * tscrollup would work here, but we can optimize to
1720 * memmove because we're freeing the earlier lines */
1721 for(/* i = 0 */; i < slide; i++) {
1722 free(term.line[i]);
1723 free(term.alt[i]);
1724 }
1725 memmove(term.line, term.line + slide, row * sizeof(Line));
1726 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1727 }
1728 for(i += row; i < term.row; i++) {
1729 free(term.line[i]);
1730 free(term.alt[i]);
1731 }
1732
1733 /* resize to new height */
1734 term.line = realloc(term.line, row * sizeof(Line));
1735 term.alt = realloc(term.alt, row * sizeof(Line));
1736 term.dirty = realloc(term.dirty, row * sizeof(*term.dirty));
1737 term.tabs = realloc(term.tabs, col * sizeof(*term.tabs));
1738
1739 /* resize each row to new width, zero-pad if needed */
1740 for(i = 0; i < minrow; i++) {
1741 term.dirty[i] = 1;
1742 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
1743 term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
1744 for(x = mincol; x < col; x++) {
1745 term.line[i][x].state = 0;
1746 term.alt[i][x].state = 0;
1747 }
1748 }
1749
1750 /* allocate any new rows */
1751 for(/* i == minrow */; i < row; i++) {
1752 term.dirty[i] = 1;
1753 term.line[i] = calloc(col, sizeof(Glyph));
1754 term.alt [i] = calloc(col, sizeof(Glyph));
1755 }
1756 if(col > term.col) {
1757 bool *bp = term.tabs + term.col;
1758
1759 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
1760 while(--bp > term.tabs && !*bp)
1761 /* nothing */ ;
1762 for(bp += TAB; bp < term.tabs + col; bp += TAB)
1763 *bp = 1;
1764 }
1765 /* update terminal size */
1766 term.col = col, term.row = row;
1767 /* make use of the LIMIT in tmoveto */
1768 tmoveto(term.c.x, term.c.y);
1769 /* reset scrolling region */
1770 tsetscroll(0, row-1);
1771
1772 return (slide > 0);
1773 }
1774
1775 void
1776 xresize(int col, int row) {
1777 xw.w = MAX(1, 2*BORDER + col * xw.cw);
1778 xw.h = MAX(1, 2*BORDER + row * xw.ch);
1779 }
1780
1781 void
1782 xloadcols(void) {
1783 int i, r, g, b;
1784 XColor color;
1785 ulong white = WhitePixel(xw.dpy, xw.scr);
1786
1787 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
1788 for(i = 0; i < LEN(colorname); i++) {
1789 if(!colorname[i])
1790 continue;
1791 if(!XAllocNamedColor(xw.dpy, xw.cmap, colorname[i], &color, &color)) {
1792 dc.col[i] = white;
1793 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1794 } else
1795 dc.col[i] = color.pixel;
1796 }
1797
1798 /* load colors [16-255] ; same colors as xterm */
1799 for(i = 16, r = 0; r < 6; r++)
1800 for(g = 0; g < 6; g++)
1801 for(b = 0; b < 6; b++) {
1802 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1803 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1804 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1805 if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
1806 dc.col[i] = white;
1807 fprintf(stderr, "Could not allocate color %d\n", i);
1808 } else
1809 dc.col[i] = color.pixel;
1810 i++;
1811 }
1812
1813 for(r = 0; r < 24; r++, i++) {
1814 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1815 if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
1816 dc.col[i] = white;
1817 fprintf(stderr, "Could not allocate color %d\n", i);
1818 } else
1819 dc.col[i] = color.pixel;
1820 }
1821 }
1822
1823 void
1824 xclear(int x1, int y1, int x2, int y2) {
1825 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
1826 XFillRectangle(xw.dpy, xw.buf, dc.gc,
1827 BORDER + x1 * xw.cw, BORDER + y1 * xw.ch,
1828 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1829 }
1830
1831 void
1832 xhints(void) {
1833 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
1834 XWMHints wm = {.flags = InputHint, .input = 1};
1835 XSizeHints *sizeh = NULL;
1836
1837 sizeh = XAllocSizeHints();
1838 if(xw.isfixed == False) {
1839 sizeh->flags = PSize | PResizeInc | PBaseSize;
1840 sizeh->height = xw.h;
1841 sizeh->width = xw.w;
1842 sizeh->height_inc = xw.ch;
1843 sizeh->width_inc = xw.cw;
1844 sizeh->base_height = 2*BORDER;
1845 sizeh->base_width = 2*BORDER;
1846 } else {
1847 sizeh->flags = PMaxSize | PMinSize;
1848 sizeh->min_width = sizeh->max_width = xw.fw;
1849 sizeh->min_height = sizeh->max_height = xw.fh;
1850 }
1851
1852 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
1853 XFree(sizeh);
1854 }
1855
1856 XFontSet
1857 xinitfont(char *fontstr) {
1858 XFontSet set;
1859 char *def, **missing;
1860 int n;
1861
1862 missing = NULL;
1863 set = XCreateFontSet(xw.dpy, fontstr, &missing, &n, &def);
1864 if(missing) {
1865 while(n--)
1866 fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
1867 XFreeStringList(missing);
1868 }
1869 return set;
1870 }
1871
1872 void
1873 xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing) {
1874 XFontStruct **xfonts;
1875 char **font_names;
1876 int i, n;
1877
1878 *ascent = *descent = *lbearing = *rbearing = 0;
1879 n = XFontsOfFontSet(set, &xfonts, &font_names);
1880 for(i = 0; i < n; i++) {
1881 *ascent = MAX(*ascent, (*xfonts)->ascent);
1882 *descent = MAX(*descent, (*xfonts)->descent);
1883 *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
1884 *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
1885 xfonts++;
1886 }
1887 }
1888
1889 void
1890 initfonts(char *fontstr, char *bfontstr, char *ifontstr) {
1891 if((dc.font.set = xinitfont(fontstr)) == NULL)
1892 die("Can't load font %s\n", fontstr);
1893 if((dc.bfont.set = xinitfont(bfontstr)) == NULL)
1894 die("Can't load bfont %s\n", bfontstr);
1895 if((dc.ifont.set = xinitfont(ifontstr)) == NULL)
1896 die("Can't load ifont %s\n", ifontstr);
1897
1898 xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
1899 &dc.font.lbearing, &dc.font.rbearing);
1900 xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
1901 &dc.bfont.lbearing, &dc.bfont.rbearing);
1902 xgetfontinfo(dc.ifont.set, &dc.ifont.ascent, &dc.ifont.descent,
1903 &dc.ifont.lbearing, &dc.ifont.rbearing);
1904 }
1905
1906 void
1907 xinit(void) {
1908 XSetWindowAttributes attrs;
1909 Cursor cursor;
1910 Window parent;
1911 int sw, sh;
1912
1913 if(!(xw.dpy = XOpenDisplay(NULL)))
1914 die("Can't open display\n");
1915 xw.scr = XDefaultScreen(xw.dpy);
1916
1917 /* adjust fixed window geometry */
1918 if(xw.isfixed) {
1919 sw = DisplayWidth(xw.dpy, xw.scr);
1920 sh = DisplayHeight(xw.dpy, xw.scr);
1921 if(xw.fx < 0)
1922 xw.fx = sw + xw.fx - xw.fw - 1;
1923 if(xw.fy < 0)
1924 xw.fy = sh + xw.fy - xw.fh - 1;
1925
1926 xw.h = xw.fh;
1927 xw.w = xw.fw;
1928 } else {
1929 /* window - default size */
1930 xw.h = 2*BORDER + term.row * xw.ch;
1931 xw.w = 2*BORDER + term.col * xw.cw;
1932 xw.fx = 0;
1933 xw.fy = 0;
1934 }
1935
1936 /* font */
1937 initfonts(FONT, BOLDFONT, ITALICFONT);
1938
1939 /* XXX: Assuming same size for bold font */
1940 xw.cw = dc.font.rbearing - dc.font.lbearing;
1941 xw.ch = dc.font.ascent + dc.font.descent;
1942
1943 /* colors */
1944 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1945 xloadcols();
1946
1947 attrs.background_pixel = dc.col[DefaultBG];
1948 attrs.border_pixel = dc.col[DefaultBG];
1949 attrs.bit_gravity = NorthWestGravity;
1950 attrs.event_mask = FocusChangeMask | KeyPressMask
1951 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1952 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask
1953 | EnterWindowMask | LeaveWindowMask;
1954 attrs.colormap = xw.cmap;
1955
1956 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
1957 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
1958 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
1959 XDefaultVisual(xw.dpy, xw.scr),
1960 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
1961 | CWColormap,
1962 &attrs);
1963 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
1964
1965
1966 /* input methods */
1967 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
1968 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
1969 | XIMStatusNothing, XNClientWindow, xw.win,
1970 XNFocusWindow, xw.win, NULL);
1971 /* gc */
1972 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
1973
1974 /* white cursor, black outline */
1975 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
1976 XDefineCursor(xw.dpy, xw.win, cursor);
1977 XRecolorCursor(xw.dpy, cursor,
1978 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
1979 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
1980
1981 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
1982
1983 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
1984 XMapWindow(xw.dpy, xw.win);
1985 xhints();
1986 XSync(xw.dpy, 0);
1987 }
1988
1989 void
1990 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
1991 int fg = base.fg, bg = base.bg, temp;
1992 int winx = BORDER+x*xw.cw, winy = BORDER+y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
1993 XFontSet fontset = dc.font.set;
1994 int i;
1995
1996 /* only switch default fg/bg if term is in RV mode */
1997 if(IS_SET(MODE_REVERSE)) {
1998 if(fg == DefaultFG)
1999 fg = DefaultBG;
2000 if(bg == DefaultBG)
2001 bg = DefaultFG;
2002 }
2003
2004 if(base.mode & ATTR_REVERSE)
2005 temp = fg, fg = bg, bg = temp;
2006
2007 if(base.mode & ATTR_BOLD) {
2008 fg += 8;
2009 fontset = dc.bfont.set;
2010 }
2011
2012 if(base.mode & ATTR_ITALIC)
2013 fontset = dc.ifont.set;
2014
2015 XSetBackground(xw.dpy, dc.gc, dc.col[bg]);
2016 XSetForeground(xw.dpy, dc.gc, dc.col[fg]);
2017
2018 if(base.mode & ATTR_GFX) {
2019 for(i = 0; i < bytelen; i++) {
2020 char c = gfx[(uint)s[i] % 256];
2021 if(c)
2022 s[i] = c;
2023 else if(s[i] > 0x5f)
2024 s[i] -= 0x5f;
2025 }
2026 }
2027
2028 XmbDrawImageString(xw.dpy, xw.buf, fontset, dc.gc, winx, winy, s, bytelen);
2029
2030 if(base.mode & ATTR_UNDERLINE)
2031 XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
2032 }
2033
2034 /* copy buffer pixmap to screen pixmap */
2035 void
2036 xcopy() {
2037 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2038 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2039
2040 }
2041
2042 void
2043 xdrawcursor(void) {
2044 static int oldx = 0;
2045 static int oldy = 0;
2046 int sl;
2047 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
2048
2049 LIMIT(oldx, 0, term.col-1);
2050 LIMIT(oldy, 0, term.row-1);
2051
2052 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2053 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2054
2055 /* remove the old cursor */
2056 if(term.line[oldy][oldx].state & GLYPH_SET) {
2057 sl = utf8size(term.line[oldy][oldx].c);
2058 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
2059 } else
2060 xclear(oldx, oldy, oldx, oldy);
2061
2062 xcopy(oldx, oldy, 1, 1);
2063
2064 /* draw the new one */
2065 if(!(term.c.state & CURSOR_HIDE)) {
2066 if(!(xw.state & WIN_FOCUSED))
2067 g.bg = DefaultUCS;
2068
2069 if(IS_SET(MODE_REVERSE))
2070 g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
2071
2072 sl = utf8size(g.c);
2073 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2074 oldx = term.c.x, oldy = term.c.y;
2075 }
2076
2077 xcopy(term.c.x, term.c.y, 1, 1);
2078 }
2079
2080 void
2081 redraw(void) {
2082 struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
2083 tfulldirt();
2084 draw();
2085 nanosleep(&tv, NULL);
2086 }
2087
2088 void
2089 draw() {
2090 drawregion(0, 0, term.col, term.row);
2091 xcopy();
2092 gettimeofday(&xw.lastdraw, NULL);
2093 }
2094
2095 void
2096 drawregion(int x1, int y1, int x2, int y2) {
2097 int ic, ib, x, y, ox, sl;
2098 Glyph base, new;
2099 char buf[DRAW_BUF_SIZ];
2100 bool ena_sel = sel.bx != -1, alt = IS_SET(MODE_ALTSCREEN);
2101
2102 if((sel.alt && !alt) || (!sel.alt && alt))
2103 ena_sel = 0;
2104 if(!(xw.state & WIN_VISIBLE))
2105 return;
2106
2107 for(y = y1; y < y2; y++) {
2108 if(!term.dirty[y])
2109 continue;
2110 xclear(0, y, term.col, y);
2111 term.dirty[y] = 0;
2112 base = term.line[y][0];
2113 ic = ib = ox = 0;
2114 for(x = x1; x < x2; x++) {
2115 new = term.line[y][x];
2116 if(ena_sel && *(new.c) && selected(x, y))
2117 new.mode ^= ATTR_REVERSE;
2118 if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
2119 ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2120 xdraws(buf, base, ox, y, ic, ib);
2121 ic = ib = 0;
2122 }
2123 if(new.state & GLYPH_SET) {
2124 if(ib == 0) {
2125 ox = x;
2126 base = new;
2127 }
2128 sl = utf8size(new.c);
2129 memcpy(buf+ib, new.c, sl);
2130 ib += sl;
2131 ++ic;
2132 }
2133 }
2134 if(ib > 0)
2135 xdraws(buf, base, ox, y, ic, ib);
2136 }
2137 xdrawcursor();
2138 }
2139
2140 void
2141 expose(XEvent *ev) {
2142 XExposeEvent *e = &ev->xexpose;
2143 if(xw.state & WIN_REDRAW) {
2144 if(!e->count)
2145 xw.state &= ~WIN_REDRAW;
2146 }
2147 xcopy();
2148 }
2149
2150 void
2151 visibility(XEvent *ev) {
2152 XVisibilityEvent *e = &ev->xvisibility;
2153 if(e->state == VisibilityFullyObscured)
2154 xw.state &= ~WIN_VISIBLE;
2155 else if(!(xw.state & WIN_VISIBLE))
2156 /* need a full redraw for next Expose, not just a buf copy */
2157 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2158 }
2159
2160 void
2161 unmap(XEvent *ev) {
2162 xw.state &= ~WIN_VISIBLE;
2163 }
2164
2165 void
2166 xseturgency(int add) {
2167 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2168 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2169 XSetWMHints(xw.dpy, xw.win, h);
2170 XFree(h);
2171 }
2172
2173 void
2174 focus(XEvent *ev) {
2175 if(ev->type == FocusIn) {
2176 xw.state |= WIN_FOCUSED;
2177 xseturgency(0);
2178 } else
2179 xw.state &= ~WIN_FOCUSED;
2180 draw();
2181 }
2182
2183 char*
2184 kmap(KeySym k, uint state) {
2185 int i;
2186 state &= ~Mod2Mask;
2187 for(i = 0; i < LEN(key); i++) {
2188 uint mask = key[i].mask;
2189 if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
2190 return (char*)key[i].s;
2191 }
2192 return NULL;
2193 }
2194
2195 void
2196 kpress(XEvent *ev) {
2197 XKeyEvent *e = &ev->xkey;
2198 KeySym ksym;
2199 char buf[32];
2200 char *customkey;
2201 int len;
2202 int meta;
2203 int shift;
2204 Status status;
2205
2206 meta = e->state & Mod1Mask;
2207 shift = e->state & ShiftMask;
2208 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
2209
2210 /* 1. custom keys from config.h */
2211 if((customkey = kmap(ksym, e->state)))
2212 ttywrite(customkey, strlen(customkey));
2213 /* 2. hardcoded (overrides X lookup) */
2214 else
2215 switch(ksym) {
2216 case XK_Up:
2217 case XK_Down:
2218 case XK_Left:
2219 case XK_Right:
2220 /* XXX: shift up/down doesn't work */
2221 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
2222 ttywrite(buf, 3);
2223 break;
2224 case XK_Insert:
2225 if(shift)
2226 selpaste();
2227 break;
2228 case XK_Return:
2229 if(IS_SET(MODE_CRLF))
2230 ttywrite("\r\n", 2);
2231 else
2232 ttywrite("\r", 1);
2233 break;
2234 /* 3. X lookup */
2235 default:
2236 if(len > 0) {
2237 if(meta && len == 1)
2238 ttywrite("\033", 1);
2239 ttywrite(buf, len);
2240 }
2241 break;
2242 }
2243 }
2244
2245 void
2246 cmessage(XEvent *e) {
2247 /* See xembed specs
2248 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2249 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2250 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2251 xw.state |= WIN_FOCUSED;
2252 xseturgency(0);
2253 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2254 xw.state &= ~WIN_FOCUSED;
2255 }
2256 draw();
2257 }
2258 }
2259
2260 void
2261 resize(XEvent *e) {
2262 int col, row;
2263
2264 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2265 return;
2266
2267 xw.w = e->xconfigure.width;
2268 xw.h = e->xconfigure.height;
2269 col = (xw.w - 2*BORDER) / xw.cw;
2270 row = (xw.h - 2*BORDER) / xw.ch;
2271 if(col == term.col && row == term.row)
2272 return;
2273 if(tresize(col, row))
2274 draw();
2275 xresize(col, row);
2276 ttyresize(col, row);
2277 }
2278
2279 bool
2280 last_draw_too_old(void) {
2281 struct timeval now;
2282 gettimeofday(&now, NULL);
2283 return TIMEDIFF(now, xw.lastdraw) >= DRAW_TIMEOUT/1000;
2284 }
2285
2286 void
2287 run(void) {
2288 XEvent ev;
2289 fd_set rfd;
2290 int xfd = XConnectionNumber(xw.dpy);
2291 struct timeval timeout = {0};
2292 bool stuff_to_print = 0;
2293
2294 for(;;) {
2295 FD_ZERO(&rfd);
2296 FD_SET(cmdfd, &rfd);
2297 FD_SET(xfd, &rfd);
2298 timeout.tv_sec = 0;
2299 timeout.tv_usec = SELECT_TIMEOUT;
2300 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, &timeout) < 0) {
2301 if(errno == EINTR)
2302 continue;
2303 die("select failed: %s\n", SERRNO);
2304 }
2305 if(FD_ISSET(cmdfd, &rfd)) {
2306 ttyread();
2307 stuff_to_print = 1;
2308 }
2309
2310 if(stuff_to_print && last_draw_too_old()) {
2311 stuff_to_print = 0;
2312 draw();
2313 }
2314
2315 while(XPending(xw.dpy)) {
2316 XNextEvent(xw.dpy, &ev);
2317 if(XFilterEvent(&ev, xw.win))
2318 continue;
2319 if(handler[ev.type])
2320 (handler[ev.type])(&ev);
2321 }
2322 }
2323 }
2324
2325 int
2326 main(int argc, char *argv[]) {
2327 int i, bitm, xr, yr;
2328 unsigned int wr, hr;
2329
2330 xw.fw = xw.fh = xw.fx = xw.fy = 0;
2331 xw.isfixed = False;
2332
2333 for(i = 1; i < argc; i++) {
2334 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2335 case 't':
2336 if(++i < argc) opt_title = argv[i];
2337 break;
2338 case 'c':
2339 if(++i < argc) opt_class = argv[i];
2340 break;
2341 case 'w':
2342 if(++i < argc) opt_embed = argv[i];
2343 break;
2344 case 'f':
2345 if(++i < argc) opt_io = argv[i];
2346 break;
2347 case 'e':
2348 /* eat every remaining arguments */
2349 if(++i < argc) opt_cmd = &argv[i];
2350 goto run;
2351 case 'g':
2352 if(++i >= argc)
2353 break;
2354
2355 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
2356 if(bitm & XValue)
2357 xw.fx = xr;
2358 if(bitm & YValue)
2359 xw.fy = yr;
2360 if(bitm & WidthValue)
2361 xw.fw = (int)wr;
2362 if(bitm & HeightValue)
2363 xw.fh = (int)hr;
2364 if(bitm & XNegative && xw.fx == 0)
2365 xw.fx = -1;
2366 if(bitm & XNegative && xw.fy == 0)
2367 xw.fy = -1;
2368
2369 if(xw.fh != 0 && xw.fw != 0)
2370 xw.isfixed = True;
2371 break;
2372 case 'v':
2373 default:
2374 die(USAGE);
2375 }
2376 }
2377
2378 run:
2379 setlocale(LC_CTYPE, "");
2380 tnew(80, 24);
2381 ttynew();
2382 xinit();
2383 selinit();
2384 run();
2385 return 0;
2386 }
2387