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[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 20*1024
52 #define UTF_SIZ 4
53 #define XK_NO_MOD UINT_MAX
54 #define XK_ANY_MOD 0
55
56 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
57
58 #define SERRNO strerror(errno)
59 #define MIN(a, b) ((a) < (b) ? (a) : (b))
60 #define MAX(a, b) ((a) < (b) ? (b) : (a))
61 #define LEN(a) (sizeof(a) / sizeof(a[0]))
62 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
63 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
64 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
65 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
66 #define IS_SET(flag) (term.mode & (flag))
67 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
68 #define X2COL(x) (((x) - BORDER)/xw.cw)
69 #define Y2ROW(y) (((y) - BORDER)/xw.ch)
70
71 enum glyph_attribute {
72 ATTR_NULL = 0,
73 ATTR_REVERSE = 1,
74 ATTR_UNDERLINE = 2,
75 ATTR_BOLD = 4,
76 ATTR_GFX = 8,
77 ATTR_ITALIC = 16,
78 ATTR_BLINK = 32,
79 };
80
81 enum cursor_movement {
82 CURSOR_UP,
83 CURSOR_DOWN,
84 CURSOR_LEFT,
85 CURSOR_RIGHT,
86 CURSOR_SAVE,
87 CURSOR_LOAD
88 };
89
90 enum cursor_state {
91 CURSOR_DEFAULT = 0,
92 CURSOR_HIDE = 1,
93 CURSOR_WRAPNEXT = 2
94 };
95
96 enum glyph_state {
97 GLYPH_SET = 1,
98 GLYPH_DIRTY = 2
99 };
100
101 enum term_mode {
102 MODE_WRAP = 1,
103 MODE_INSERT = 2,
104 MODE_APPKEYPAD = 4,
105 MODE_ALTSCREEN = 8,
106 MODE_CRLF = 16,
107 MODE_MOUSEBTN = 32,
108 MODE_MOUSEMOTION = 64,
109 MODE_MOUSE = 32|64,
110 MODE_REVERSE = 128
111 };
112
113 enum escape_state {
114 ESC_START = 1,
115 ESC_CSI = 2,
116 ESC_STR = 4, /* DSC, OSC, PM, APC */
117 ESC_ALTCHARSET = 8,
118 ESC_STR_END = 16, /* a final string was encountered */
119 };
120
121 enum window_state {
122 WIN_VISIBLE = 1,
123 WIN_REDRAW = 2,
124 WIN_FOCUSED = 4
125 };
126
127 /* bit macro */
128 #undef B0
129 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
130
131 typedef unsigned char uchar;
132 typedef unsigned int uint;
133 typedef unsigned long ulong;
134 typedef unsigned short ushort;
135
136 typedef struct {
137 char c[UTF_SIZ]; /* character code */
138 uchar mode; /* attribute flags */
139 ushort fg; /* foreground */
140 ushort bg; /* background */
141 uchar state; /* state flags */
142 } Glyph;
143
144 typedef Glyph* Line;
145
146 typedef struct {
147 Glyph attr; /* current char attributes */
148 int x;
149 int y;
150 char state;
151 } TCursor;
152
153 /* CSI Escape sequence structs */
154 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
155 typedef struct {
156 char buf[ESC_BUF_SIZ]; /* raw string */
157 int len; /* raw string length */
158 char priv;
159 int arg[ESC_ARG_SIZ];
160 int narg; /* nb of args */
161 char mode;
162 } CSIEscape;
163
164 /* STR Escape sequence structs */
165 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
166 typedef struct {
167 char type; /* ESC type ... */
168 char buf[STR_BUF_SIZ]; /* raw string */
169 int len; /* raw string length */
170 char *args[STR_ARG_SIZ];
171 int narg; /* nb of args */
172 } STREscape;
173
174 /* Internal representation of the screen */
175 typedef struct {
176 int row; /* nb row */
177 int col; /* nb col */
178 Line* line; /* screen */
179 Line* alt; /* alternate screen */
180 bool* dirty; /* dirtyness of lines */
181 TCursor c; /* cursor */
182 int top; /* top scroll limit */
183 int bot; /* bottom scroll limit */
184 int mode; /* terminal mode flags */
185 int esc; /* escape state flags */
186 bool *tabs;
187 } Term;
188
189 /* Purely graphic info */
190 typedef struct {
191 Display* dpy;
192 Colormap cmap;
193 Window win;
194 XdbeBackBuffer buf;
195 Atom xembed;
196 XIM xim;
197 XIC xic;
198 int scr;
199 Bool isfixed; /* is fixed geometry? */
200 int fx, fy, fw, fh; /* fixed geometry */
201 int w; /* window width */
202 int h; /* window height */
203 int ch; /* char height */
204 int cw; /* char width */
205 char state; /* focus, redraw, visible */
206 } XWindow;
207
208 typedef struct {
209 KeySym k;
210 uint mask;
211 char s[ESC_BUF_SIZ];
212 } Key;
213
214
215 /* TODO: use better name for vars... */
216 typedef struct {
217 int mode;
218 int bx, by;
219 int ex, ey;
220 struct {int x, y;} b, e;
221 char *clip;
222 Atom xtarget;
223 bool alt;
224 struct timeval tclick1;
225 struct timeval tclick2;
226 } Selection;
227
228 #include "config.h"
229
230 /* Drawing Context */
231 typedef struct {
232 ulong col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
233 GC gc;
234 struct {
235 int ascent;
236 int descent;
237 short lbearing;
238 short rbearing;
239 XFontSet set;
240 } font, bfont, ifont, ibfont;
241 } DC;
242
243 static void die(const char*, ...);
244 static void draw(void);
245 static void redraw(void);
246 static void drawregion(int, int, int, int);
247 static void execsh(void);
248 static void sigchld(int);
249 static void run(void);
250
251 static void csidump(void);
252 static void csihandle(void);
253 static void csiparse(void);
254 static void csireset(void);
255 static void strdump(void);
256 static void strhandle(void);
257 static void strparse(void);
258 static void strreset(void);
259
260 static void tclearregion(int, int, int, int);
261 static void tcursor(int);
262 static void tdeletechar(int);
263 static void tdeleteline(int);
264 static void tinsertblank(int);
265 static void tinsertblankline(int);
266 static void tmoveto(int, int);
267 static void tnew(int, int);
268 static void tnewline(int);
269 static void tputtab(bool);
270 static void tputc(char*);
271 static void treset(void);
272 static int tresize(int, int);
273 static void tscrollup(int, int);
274 static void tscrolldown(int, int);
275 static void tsetattr(int*, int);
276 static void tsetchar(char*);
277 static void tsetscroll(int, int);
278 static void tswapscreen(void);
279 static void tsetdirt(int, int);
280 static void tsetmode(bool, bool, int *, int);
281 static void tfulldirt(void);
282
283 static void ttynew(void);
284 static void ttyread(void);
285 static void ttyresize(int, int);
286 static void ttywrite(const char *, size_t);
287
288 static void xdraws(char *, Glyph, int, int, int, int);
289 static void xhints(void);
290 static void xclear(int, int, int, int);
291 static void xdrawcursor(void);
292 static void xinit(void);
293 static void xloadcols(void);
294 static void xresettitle(void);
295 static void xseturgency(int);
296 static void xsetsel(char*);
297 static void xresize(int, int);
298
299 static void expose(XEvent *);
300 static void visibility(XEvent *);
301 static void unmap(XEvent *);
302 static char* kmap(KeySym, uint);
303 static void kpress(XEvent *);
304 static void cmessage(XEvent *);
305 static void resize(XEvent *);
306 static void focus(XEvent *);
307 static void brelease(XEvent *);
308 static void bpress(XEvent *);
309 static void bmotion(XEvent *);
310 static void selnotify(XEvent *);
311 static void selclear(XEvent *);
312 static void selrequest(XEvent *);
313
314 static void selinit(void);
315 static inline bool selected(int, int);
316 static void selcopy(void);
317 static void selpaste(void);
318 static void selscroll(int, int);
319
320 static int utf8decode(char *, long *);
321 static int utf8encode(long *, char *);
322 static int utf8size(char *);
323 static int isfullutf8(char *, int);
324
325 static void *xmalloc(size_t);
326 static void *xrealloc(void *, size_t);
327 static void *xcalloc(size_t nmemb, size_t size);
328
329 static void (*handler[LASTEvent])(XEvent *) = {
330 [KeyPress] = kpress,
331 [ClientMessage] = cmessage,
332 [ConfigureNotify] = resize,
333 [VisibilityNotify] = visibility,
334 [UnmapNotify] = unmap,
335 [Expose] = expose,
336 [FocusIn] = focus,
337 [FocusOut] = focus,
338 [MotionNotify] = bmotion,
339 [ButtonPress] = bpress,
340 [ButtonRelease] = brelease,
341 [SelectionClear] = selclear,
342 [SelectionNotify] = selnotify,
343 [SelectionRequest] = selrequest,
344 };
345
346 /* Globals */
347 static DC dc;
348 static XWindow xw;
349 static Term term;
350 static CSIEscape csiescseq;
351 static STREscape strescseq;
352 static int cmdfd;
353 static pid_t pid;
354 static Selection sel;
355 static int iofd = -1;
356 static char **opt_cmd = NULL;
357 static char *opt_io = NULL;
358 static char *opt_title = NULL;
359 static char *opt_embed = NULL;
360 static char *opt_class = NULL;
361
362 void *
363 xmalloc(size_t len) {
364 void *p = malloc(len);
365 if(!p)
366 die("Out of memory");
367 return p;
368 }
369
370 void *
371 xrealloc(void *p, size_t len) {
372 if((p = realloc(p, len)) == NULL)
373 die("Out of memory");
374 return p;
375 }
376
377 void *
378 xcalloc(size_t nmemb, size_t size) {
379 void *p = calloc(nmemb, size);
380 if(!p)
381 die("Out of memory\n");
382 return p;
383 }
384
385 int
386 utf8decode(char *s, long *u) {
387 uchar c;
388 int i, n, rtn;
389
390 rtn = 1;
391 c = *s;
392 if(~c & B7) { /* 0xxxxxxx */
393 *u = c;
394 return rtn;
395 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
396 *u = c&(B4|B3|B2|B1|B0);
397 n = 1;
398 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
399 *u = c&(B3|B2|B1|B0);
400 n = 2;
401 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
402 *u = c & (B2|B1|B0);
403 n = 3;
404 } else
405 goto invalid;
406 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
407 c = *s;
408 if((c & (B7|B6)) != B7) /* 10xxxxxx */
409 goto invalid;
410 *u <<= 6;
411 *u |= c & (B5|B4|B3|B2|B1|B0);
412 }
413 if((n == 1 && *u < 0x80) ||
414 (n == 2 && *u < 0x800) ||
415 (n == 3 && *u < 0x10000) ||
416 (*u >= 0xD800 && *u <= 0xDFFF))
417 goto invalid;
418 return rtn;
419 invalid:
420 *u = 0xFFFD;
421 return rtn;
422 }
423
424 int
425 utf8encode(long *u, char *s) {
426 uchar *sp;
427 ulong uc;
428 int i, n;
429
430 sp = (uchar*) s;
431 uc = *u;
432 if(uc < 0x80) {
433 *sp = uc; /* 0xxxxxxx */
434 return 1;
435 } else if(*u < 0x800) {
436 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
437 n = 1;
438 } else if(uc < 0x10000) {
439 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
440 n = 2;
441 } else if(uc <= 0x10FFFF) {
442 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
443 n = 3;
444 } else {
445 goto invalid;
446 }
447 for(i=n,++sp; i>0; --i,++sp)
448 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
449 return n+1;
450 invalid:
451 /* U+FFFD */
452 *s++ = '\xEF';
453 *s++ = '\xBF';
454 *s = '\xBD';
455 return 3;
456 }
457
458 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
459 UTF-8 otherwise return 0 */
460 int
461 isfullutf8(char *s, int b) {
462 uchar *c1, *c2, *c3;
463
464 c1 = (uchar *) s;
465 c2 = (uchar *) ++s;
466 c3 = (uchar *) ++s;
467 if(b < 1)
468 return 0;
469 else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
470 return 0;
471 else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
472 ((b == 1) ||
473 ((b == 2) && (*c2&(B7|B6)) == B7)))
474 return 0;
475 else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
476 ((b == 1) ||
477 ((b == 2) && (*c2&(B7|B6)) == B7) ||
478 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7)))
479 return 0;
480 else
481 return 1;
482 }
483
484 int
485 utf8size(char *s) {
486 uchar c = *s;
487
488 if(~c&B7)
489 return 1;
490 else if((c&(B7|B6|B5)) == (B7|B6))
491 return 2;
492 else if((c&(B7|B6|B5|B4)) == (B7|B6|B5))
493 return 3;
494 else
495 return 4;
496 }
497
498 void
499 selinit(void) {
500 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
501 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
502 sel.mode = 0;
503 sel.bx = -1;
504 sel.clip = NULL;
505 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
506 if(sel.xtarget == None)
507 sel.xtarget = XA_STRING;
508 }
509
510 static inline bool
511 selected(int x, int y) {
512 if(sel.ey == y && sel.by == y) {
513 int bx = MIN(sel.bx, sel.ex);
514 int ex = MAX(sel.bx, sel.ex);
515 return BETWEEN(x, bx, ex);
516 }
517 return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
518 || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
519 }
520
521 void
522 getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
523 if(b)
524 *b = e->xbutton.button;
525
526 *x = X2COL(e->xbutton.x);
527 *y = Y2ROW(e->xbutton.y);
528 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
529 sel.b.y = MIN(sel.by, sel.ey);
530 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
531 sel.e.y = MAX(sel.by, sel.ey);
532 }
533
534 void
535 mousereport(XEvent *e) {
536 int x = X2COL(e->xbutton.x);
537 int y = Y2ROW(e->xbutton.y);
538 int button = e->xbutton.button;
539 int state = e->xbutton.state;
540 char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
541 static int ob, ox, oy;
542
543 /* from urxvt */
544 if(e->xbutton.type == MotionNotify) {
545 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
546 return;
547 button = ob + 32;
548 ox = x, oy = y;
549 } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
550 button = 3;
551 } else {
552 button -= Button1;
553 if(button >= 3)
554 button += 64 - 3;
555 if(e->xbutton.type == ButtonPress) {
556 ob = button;
557 ox = x, oy = y;
558 }
559 }
560
561 buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
562 + (state & Mod4Mask ? 8 : 0)
563 + (state & ControlMask ? 16 : 0);
564
565 ttywrite(buf, sizeof(buf));
566 }
567
568 void
569 bpress(XEvent *e) {
570 if(IS_SET(MODE_MOUSE))
571 mousereport(e);
572 else if(e->xbutton.button == Button1) {
573 if(sel.bx != -1) {
574 sel.bx = -1;
575 tsetdirt(sel.b.y, sel.e.y);
576 draw();
577 }
578 sel.mode = 1;
579 sel.ex = sel.bx = X2COL(e->xbutton.x);
580 sel.ey = sel.by = Y2ROW(e->xbutton.y);
581 }
582 }
583
584 void
585 selcopy(void) {
586 char *str, *ptr;
587 int x, y, bufsize, is_selected = 0;
588
589 if(sel.bx == -1)
590 str = NULL;
591
592 else {
593 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
594 ptr = str = xmalloc(bufsize);
595
596 /* append every set & selected glyph to the selection */
597 for(y = 0; y < term.row; y++) {
598 for(x = 0; x < term.col; x++) {
599 is_selected = selected(x, y);
600 if((term.line[y][x].state & GLYPH_SET) && is_selected) {
601 int size = utf8size(term.line[y][x].c);
602 memcpy(ptr, term.line[y][x].c, size);
603 ptr += size;
604 }
605 }
606
607 /* \n at the end of every selected line except for the last one */
608 if(is_selected && y < sel.e.y)
609 *ptr++ = '\n';
610 }
611 *ptr = 0;
612 }
613 sel.alt = IS_SET(MODE_ALTSCREEN);
614 xsetsel(str);
615 }
616
617 void
618 selnotify(XEvent *e) {
619 ulong nitems, ofs, rem;
620 int format;
621 uchar *data;
622 Atom type;
623
624 ofs = 0;
625 do {
626 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
627 False, AnyPropertyType, &type, &format,
628 &nitems, &rem, &data)) {
629 fprintf(stderr, "Clipboard allocation failed\n");
630 return;
631 }
632 ttywrite((const char *) data, nitems * format / 8);
633 XFree(data);
634 /* number of 32-bit chunks returned */
635 ofs += nitems * format / 32;
636 } while(rem > 0);
637 }
638
639 void
640 selpaste() {
641 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY, xw.win, CurrentTime);
642 }
643
644 void selclear(XEvent *e) {
645 if(sel.bx == -1)
646 return;
647 sel.bx = -1;
648 tsetdirt(sel.b.y, sel.e.y);
649 }
650
651 void
652 selrequest(XEvent *e) {
653 XSelectionRequestEvent *xsre;
654 XSelectionEvent xev;
655 Atom xa_targets;
656
657 xsre = (XSelectionRequestEvent *) e;
658 xev.type = SelectionNotify;
659 xev.requestor = xsre->requestor;
660 xev.selection = xsre->selection;
661 xev.target = xsre->target;
662 xev.time = xsre->time;
663 /* reject */
664 xev.property = None;
665
666 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
667 if(xsre->target == xa_targets) {
668 /* respond with the supported type */
669 Atom string = sel.xtarget;
670 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
671 XA_ATOM, 32, PropModeReplace,
672 (uchar *) &string, 1);
673 xev.property = xsre->property;
674 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
675 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
676 xsre->target, 8, PropModeReplace,
677 (uchar *) sel.clip, strlen(sel.clip));
678 xev.property = xsre->property;
679 }
680
681 /* all done, send a notification to the listener */
682 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
683 fprintf(stderr, "Error sending SelectionNotify event\n");
684 }
685
686 void
687 xsetsel(char *str) {
688 /* register the selection for both the clipboard and the primary */
689 Atom clipboard;
690
691 free(sel.clip);
692 sel.clip = str;
693
694 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
695
696 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
697 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
698 }
699
700 void
701 brelease(XEvent *e) {
702 if(IS_SET(MODE_MOUSE)) {
703 mousereport(e);
704 return;
705 }
706 if(e->xbutton.button == Button2)
707 selpaste();
708 else if(e->xbutton.button == Button1) {
709 sel.mode = 0;
710 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
711 term.dirty[sel.ey] = 1;
712 if(sel.bx == sel.ex && sel.by == sel.ey) {
713 struct timeval now;
714 sel.bx = -1;
715 gettimeofday(&now, NULL);
716
717 if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
718 /* triple click on the line */
719 sel.b.x = sel.bx = 0;
720 sel.e.x = sel.ex = term.col;
721 sel.b.y = sel.e.y = sel.ey;
722 selcopy();
723 } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
724 /* double click to select word */
725 sel.bx = sel.ex;
726 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
727 term.line[sel.ey][sel.bx-1].c[0] != ' ') sel.bx--;
728 sel.b.x = sel.bx;
729 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
730 term.line[sel.ey][sel.ex+1].c[0] != ' ') sel.ex++;
731 sel.e.x = sel.ex;
732 sel.b.y = sel.e.y = sel.ey;
733 selcopy();
734 }
735 } else
736 selcopy();
737 }
738 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
739 gettimeofday(&sel.tclick1, NULL);
740 }
741
742 void
743 bmotion(XEvent *e) {
744 if(IS_SET(MODE_MOUSE)) {
745 mousereport(e);
746 return;
747 }
748 if(sel.mode) {
749 int oldey = sel.ey, oldex = sel.ex;
750 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
751
752 if(oldey != sel.ey || oldex != sel.ex) {
753 int starty = MIN(oldey, sel.ey);
754 int endy = MAX(oldey, sel.ey);
755 tsetdirt(starty, endy);
756 }
757 }
758 }
759
760 void
761 die(const char *errstr, ...) {
762 va_list ap;
763
764 va_start(ap, errstr);
765 vfprintf(stderr, errstr, ap);
766 va_end(ap);
767 exit(EXIT_FAILURE);
768 }
769
770 void
771 execsh(void) {
772 char **args;
773 char *envshell = getenv("SHELL");
774
775 unsetenv("COLUMNS");
776 unsetenv("LINES");
777 unsetenv("TERMCAP");
778
779 signal(SIGCHLD, SIG_DFL);
780 signal(SIGHUP, SIG_DFL);
781 signal(SIGINT, SIG_DFL);
782 signal(SIGQUIT, SIG_DFL);
783 signal(SIGTERM, SIG_DFL);
784 signal(SIGALRM, SIG_DFL);
785
786 DEFAULT(envshell, SHELL);
787 putenv("TERM="TNAME);
788 args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
789 execvp(args[0], args);
790 exit(EXIT_FAILURE);
791 }
792
793 void
794 sigchld(int a) {
795 int stat = 0;
796 if(waitpid(pid, &stat, 0) < 0)
797 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
798 if(WIFEXITED(stat))
799 exit(WEXITSTATUS(stat));
800 else
801 exit(EXIT_FAILURE);
802 }
803
804 void
805 ttynew(void) {
806 int m, s;
807
808 /* seems to work fine on linux, openbsd and freebsd */
809 struct winsize w = {term.row, term.col, 0, 0};
810 if(openpty(&m, &s, NULL, NULL, &w) < 0)
811 die("openpty failed: %s\n", SERRNO);
812
813 switch(pid = fork()) {
814 case -1:
815 die("fork failed\n");
816 break;
817 case 0:
818 setsid(); /* create a new process group */
819 dup2(s, STDIN_FILENO);
820 dup2(s, STDOUT_FILENO);
821 dup2(s, STDERR_FILENO);
822 if(ioctl(s, TIOCSCTTY, NULL) < 0)
823 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
824 close(s);
825 close(m);
826 execsh();
827 break;
828 default:
829 close(s);
830 cmdfd = m;
831 signal(SIGCHLD, sigchld);
832 if(opt_io) {
833 if(!strcmp(opt_io, "-")) {
834 iofd = STDOUT_FILENO;
835 } else {
836 if((iofd = open(opt_io, O_WRONLY | O_CREAT, 0666)) < 0) {
837 fprintf(stderr, "Error opening %s:%s\n",
838 opt_io, strerror(errno));
839 }
840 }
841 }
842 }
843 }
844
845 void
846 dump(char c) {
847 static int col;
848 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
849 if(++col % 10 == 0)
850 fprintf(stderr, "\n");
851 }
852
853 void
854 ttyread(void) {
855 static char buf[BUFSIZ];
856 static int buflen = 0;
857 char *ptr;
858 char s[UTF_SIZ];
859 int charsize; /* size of utf8 char in bytes */
860 long utf8c;
861 int ret;
862
863 /* append read bytes to unprocessed bytes */
864 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
865 die("Couldn't read from shell: %s\n", SERRNO);
866
867 /* process every complete utf8 char */
868 buflen += ret;
869 ptr = buf;
870 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
871 charsize = utf8decode(ptr, &utf8c);
872 utf8encode(&utf8c, s);
873 tputc(s);
874 ptr += charsize;
875 buflen -= charsize;
876 }
877
878 /* keep any uncomplete utf8 char for the next call */
879 memmove(buf, ptr, buflen);
880 }
881
882 void
883 ttywrite(const char *s, size_t n) {
884 if(write(cmdfd, s, n) == -1)
885 die("write error on tty: %s\n", SERRNO);
886 }
887
888 void
889 ttyresize(int x, int y) {
890 struct winsize w;
891
892 w.ws_row = term.row;
893 w.ws_col = term.col;
894 w.ws_xpixel = xw.w;
895 w.ws_ypixel = xw.h;
896 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
897 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
898 }
899
900 void
901 tsetdirt(int top, int bot)
902 {
903 int i;
904
905 LIMIT(top, 0, term.row-1);
906 LIMIT(bot, 0, term.row-1);
907
908 for(i = top; i <= bot; i++)
909 term.dirty[i] = 1;
910 }
911
912 void
913 tfulldirt(void)
914 {
915 tsetdirt(0, term.row-1);
916 }
917
918 void
919 tcursor(int mode) {
920 static TCursor c;
921
922 if(mode == CURSOR_SAVE)
923 c = term.c;
924 else if(mode == CURSOR_LOAD)
925 term.c = c, tmoveto(c.x, c.y);
926 }
927
928 void
929 treset(void) {
930 unsigned i;
931 term.c = (TCursor){{
932 .mode = ATTR_NULL,
933 .fg = DefaultFG,
934 .bg = DefaultBG
935 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
936
937 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
938 for(i = TAB; i < term.col; i += TAB)
939 term.tabs[i] = 1;
940 term.top = 0, term.bot = term.row - 1;
941 term.mode = MODE_WRAP;
942 tclearregion(0, 0, term.col-1, term.row-1);
943 }
944
945 void
946 tnew(int col, int row) {
947 /* set screen size */
948 term.row = row, term.col = col;
949 term.line = xmalloc(term.row * sizeof(Line));
950 term.alt = xmalloc(term.row * sizeof(Line));
951 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
952 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
953
954 for(row = 0; row < term.row; row++) {
955 term.line[row] = xmalloc(term.col * sizeof(Glyph));
956 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
957 term.dirty[row] = 0;
958 }
959 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
960 /* setup screen */
961 treset();
962 }
963
964 void
965 tswapscreen(void) {
966 Line* tmp = term.line;
967 term.line = term.alt;
968 term.alt = tmp;
969 term.mode ^= MODE_ALTSCREEN;
970 tfulldirt();
971 }
972
973 void
974 tscrolldown(int orig, int n) {
975 int i;
976 Line temp;
977
978 LIMIT(n, 0, term.bot-orig+1);
979
980 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
981
982 for(i = term.bot; i >= orig+n; i--) {
983 temp = term.line[i];
984 term.line[i] = term.line[i-n];
985 term.line[i-n] = temp;
986
987 term.dirty[i] = 1;
988 term.dirty[i-n] = 1;
989 }
990
991 selscroll(orig, n);
992 }
993
994 void
995 tscrollup(int orig, int n) {
996 int i;
997 Line temp;
998 LIMIT(n, 0, term.bot-orig+1);
999
1000 tclearregion(0, orig, term.col-1, orig+n-1);
1001
1002 for(i = orig; i <= term.bot-n; i++) {
1003 temp = term.line[i];
1004 term.line[i] = term.line[i+n];
1005 term.line[i+n] = temp;
1006
1007 term.dirty[i] = 1;
1008 term.dirty[i+n] = 1;
1009 }
1010
1011 selscroll(orig, -n);
1012 }
1013
1014 void
1015 selscroll(int orig, int n) {
1016 if(sel.bx == -1)
1017 return;
1018
1019 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1020 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1021 sel.bx = -1;
1022 return;
1023 }
1024 if(sel.by < term.top) {
1025 sel.by = term.top;
1026 sel.bx = 0;
1027 }
1028 if(sel.ey > term.bot) {
1029 sel.ey = term.bot;
1030 sel.ex = term.col;
1031 }
1032 sel.b.y = sel.by, sel.b.x = sel.bx;
1033 sel.e.y = sel.ey, sel.e.x = sel.ex;
1034 }
1035 }
1036
1037 void
1038 tnewline(int first_col) {
1039 int y = term.c.y;
1040 if(y == term.bot)
1041 tscrollup(term.top, 1);
1042 else
1043 y++;
1044 tmoveto(first_col ? 0 : term.c.x, y);
1045 }
1046
1047 void
1048 csiparse(void) {
1049 /* int noarg = 1; */
1050 char *p = csiescseq.buf;
1051
1052 csiescseq.narg = 0;
1053 if(*p == '?')
1054 csiescseq.priv = 1, p++;
1055
1056 while(p < csiescseq.buf+csiescseq.len) {
1057 while(isdigit(*p)) {
1058 csiescseq.arg[csiescseq.narg] *= 10;
1059 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1060 }
1061 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ)
1062 csiescseq.narg++, p++;
1063 else {
1064 csiescseq.mode = *p;
1065 csiescseq.narg++;
1066 return;
1067 }
1068 }
1069 }
1070
1071 void
1072 tmoveto(int x, int y) {
1073 LIMIT(x, 0, term.col-1);
1074 LIMIT(y, 0, term.row-1);
1075 term.c.state &= ~CURSOR_WRAPNEXT;
1076 term.c.x = x;
1077 term.c.y = y;
1078 }
1079
1080 void
1081 tsetchar(char *c) {
1082 term.dirty[term.c.y] = 1;
1083 term.line[term.c.y][term.c.x] = term.c.attr;
1084 memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
1085 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
1086 }
1087
1088 void
1089 tclearregion(int x1, int y1, int x2, int y2) {
1090 int x, y, temp;
1091
1092 if(x1 > x2)
1093 temp = x1, x1 = x2, x2 = temp;
1094 if(y1 > y2)
1095 temp = y1, y1 = y2, y2 = temp;
1096
1097 LIMIT(x1, 0, term.col-1);
1098 LIMIT(x2, 0, term.col-1);
1099 LIMIT(y1, 0, term.row-1);
1100 LIMIT(y2, 0, term.row-1);
1101
1102 for(y = y1; y <= y2; y++) {
1103 term.dirty[y] = 1;
1104 for(x = x1; x <= x2; x++)
1105 term.line[y][x].state = 0;
1106 }
1107 }
1108
1109 void
1110 tdeletechar(int n) {
1111 int src = term.c.x + n;
1112 int dst = term.c.x;
1113 int size = term.col - src;
1114
1115 term.dirty[term.c.y] = 1;
1116
1117 if(src >= term.col) {
1118 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1119 return;
1120 }
1121 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1122 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1123 }
1124
1125 void
1126 tinsertblank(int n) {
1127 int src = term.c.x;
1128 int dst = src + n;
1129 int size = term.col - dst;
1130
1131 term.dirty[term.c.y] = 1;
1132
1133 if(dst >= term.col) {
1134 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1135 return;
1136 }
1137 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1138 tclearregion(src, term.c.y, dst - 1, term.c.y);
1139 }
1140
1141 void
1142 tinsertblankline(int n) {
1143 if(term.c.y < term.top || term.c.y > term.bot)
1144 return;
1145
1146 tscrolldown(term.c.y, n);
1147 }
1148
1149 void
1150 tdeleteline(int n) {
1151 if(term.c.y < term.top || term.c.y > term.bot)
1152 return;
1153
1154 tscrollup(term.c.y, n);
1155 }
1156
1157 void
1158 tsetattr(int *attr, int l) {
1159 int i;
1160
1161 for(i = 0; i < l; i++) {
1162 switch(attr[i]) {
1163 case 0:
1164 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1165 | ATTR_ITALIC | ATTR_BLINK);
1166 term.c.attr.fg = DefaultFG;
1167 term.c.attr.bg = DefaultBG;
1168 break;
1169 case 1:
1170 term.c.attr.mode |= ATTR_BOLD;
1171 break;
1172 case 3: /* enter standout (highlight) */
1173 term.c.attr.mode |= ATTR_ITALIC;
1174 break;
1175 case 4:
1176 term.c.attr.mode |= ATTR_UNDERLINE;
1177 break;
1178 case 5:
1179 term.c.attr.mode |= ATTR_BLINK;
1180 break;
1181 case 7:
1182 term.c.attr.mode |= ATTR_REVERSE;
1183 break;
1184 case 21:
1185 case 22:
1186 term.c.attr.mode &= ~ATTR_BOLD;
1187 break;
1188 case 23: /* leave standout (highlight) mode */
1189 term.c.attr.mode &= ~ATTR_ITALIC;
1190 break;
1191 case 24:
1192 term.c.attr.mode &= ~ATTR_UNDERLINE;
1193 break;
1194 case 25:
1195 term.c.attr.mode &= ~ATTR_BLINK;
1196 break;
1197 case 27:
1198 term.c.attr.mode &= ~ATTR_REVERSE;
1199 break;
1200 case 38:
1201 if(i + 2 < l && attr[i + 1] == 5) {
1202 i += 2;
1203 if(BETWEEN(attr[i], 0, 255))
1204 term.c.attr.fg = attr[i];
1205 else
1206 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
1207 }
1208 else
1209 fprintf(stderr, "erresc(38): gfx attr %d unknown\n", attr[i]);
1210 break;
1211 case 39:
1212 term.c.attr.fg = DefaultFG;
1213 break;
1214 case 48:
1215 if(i + 2 < l && attr[i + 1] == 5) {
1216 i += 2;
1217 if(BETWEEN(attr[i], 0, 255))
1218 term.c.attr.bg = attr[i];
1219 else
1220 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
1221 }
1222 else
1223 fprintf(stderr, "erresc(48): gfx attr %d unknown\n", attr[i]);
1224 break;
1225 case 49:
1226 term.c.attr.bg = DefaultBG;
1227 break;
1228 default:
1229 if(BETWEEN(attr[i], 30, 37))
1230 term.c.attr.fg = attr[i] - 30;
1231 else if(BETWEEN(attr[i], 40, 47))
1232 term.c.attr.bg = attr[i] - 40;
1233 else if(BETWEEN(attr[i], 90, 97))
1234 term.c.attr.fg = attr[i] - 90 + 8;
1235 else if(BETWEEN(attr[i], 100, 107))
1236 term.c.attr.bg = attr[i] - 100 + 8;
1237 else
1238 fprintf(stderr, "erresc(default): gfx attr %d unknown\n", attr[i]), csidump();
1239 break;
1240 }
1241 }
1242 }
1243
1244 void
1245 tsetscroll(int t, int b) {
1246 int temp;
1247
1248 LIMIT(t, 0, term.row-1);
1249 LIMIT(b, 0, term.row-1);
1250 if(t > b) {
1251 temp = t;
1252 t = b;
1253 b = temp;
1254 }
1255 term.top = t;
1256 term.bot = b;
1257 }
1258
1259 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1260
1261 void
1262 tsetmode(bool priv, bool set, int *args, int narg) {
1263 int *lim, mode;
1264
1265 for(lim = args + narg; args < lim; ++args) {
1266 if(priv) {
1267 switch(*args) {
1268 case 1:
1269 MODBIT(term.mode, set, MODE_APPKEYPAD);
1270 break;
1271 case 5: /* DECSCNM -- Reverve video */
1272 mode = term.mode;
1273 MODBIT(term.mode,set, MODE_REVERSE);
1274 if(mode != term.mode)
1275 redraw();
1276 break;
1277 case 7:
1278 MODBIT(term.mode, set, MODE_WRAP);
1279 break;
1280 case 20:
1281 MODBIT(term.mode, set, MODE_CRLF);
1282 break;
1283 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1284 break;
1285 case 25:
1286 MODBIT(term.c.state, !set, CURSOR_HIDE);
1287 break;
1288 case 1000: /* 1000,1002: enable xterm mouse report */
1289 MODBIT(term.mode, set, MODE_MOUSEBTN);
1290 break;
1291 case 1002:
1292 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1293 break;
1294 case 1049: /* = 1047 and 1048 */
1295 case 47:
1296 case 1047:
1297 if(IS_SET(MODE_ALTSCREEN))
1298 tclearregion(0, 0, term.col-1, term.row-1);
1299 if((set && !IS_SET(MODE_ALTSCREEN)) ||
1300 (!set && IS_SET(MODE_ALTSCREEN))) {
1301 tswapscreen();
1302 }
1303 if(*args != 1049)
1304 break;
1305 /* pass through */
1306 case 1048:
1307 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1308 break;
1309 default:
1310 fprintf(stderr,
1311 "erresc: unknown private set/reset mode %d\n",
1312 *args);
1313 break;
1314 }
1315 } else {
1316 switch(*args) {
1317 case 4:
1318 MODBIT(term.mode, set, MODE_INSERT);
1319 break;
1320 default:
1321 fprintf(stderr,
1322 "erresc: unknown set/reset mode %d\n",
1323 *args);
1324 break;
1325 }
1326 }
1327 }
1328 }
1329 #undef MODBIT
1330
1331
1332 void
1333 csihandle(void) {
1334 switch(csiescseq.mode) {
1335 default:
1336 unknown:
1337 fprintf(stderr, "erresc: unknown csi ");
1338 csidump();
1339 /* die(""); */
1340 break;
1341 case '@': /* ICH -- Insert <n> blank char */
1342 DEFAULT(csiescseq.arg[0], 1);
1343 tinsertblank(csiescseq.arg[0]);
1344 break;
1345 case 'A': /* CUU -- Cursor <n> Up */
1346 case 'e':
1347 DEFAULT(csiescseq.arg[0], 1);
1348 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1349 break;
1350 case 'B': /* CUD -- Cursor <n> Down */
1351 DEFAULT(csiescseq.arg[0], 1);
1352 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1353 break;
1354 case 'C': /* CUF -- Cursor <n> Forward */
1355 case 'a':
1356 DEFAULT(csiescseq.arg[0], 1);
1357 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1358 break;
1359 case 'D': /* CUB -- Cursor <n> Backward */
1360 DEFAULT(csiescseq.arg[0], 1);
1361 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1362 break;
1363 case 'E': /* CNL -- Cursor <n> Down and first col */
1364 DEFAULT(csiescseq.arg[0], 1);
1365 tmoveto(0, term.c.y+csiescseq.arg[0]);
1366 break;
1367 case 'F': /* CPL -- Cursor <n> Up and first col */
1368 DEFAULT(csiescseq.arg[0], 1);
1369 tmoveto(0, term.c.y-csiescseq.arg[0]);
1370 break;
1371 case 'g': /* TBC -- Tabulation clear */
1372 switch (csiescseq.arg[0]) {
1373 case 0: /* clear current tab stop */
1374 term.tabs[term.c.x] = 0;
1375 break;
1376 case 3: /* clear all the tabs */
1377 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1378 break;
1379 default:
1380 goto unknown;
1381 }
1382 break;
1383 case 'G': /* CHA -- Move to <col> */
1384 case '`': /* HPA */
1385 DEFAULT(csiescseq.arg[0], 1);
1386 tmoveto(csiescseq.arg[0]-1, term.c.y);
1387 break;
1388 case 'H': /* CUP -- Move to <row> <col> */
1389 case 'f': /* HVP */
1390 DEFAULT(csiescseq.arg[0], 1);
1391 DEFAULT(csiescseq.arg[1], 1);
1392 tmoveto(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1393 break;
1394 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1395 DEFAULT(csiescseq.arg[0], 1);
1396 while(csiescseq.arg[0]--)
1397 tputtab(1);
1398 break;
1399 case 'J': /* ED -- Clear screen */
1400 sel.bx = -1;
1401 switch(csiescseq.arg[0]) {
1402 case 0: /* below */
1403 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1404 if(term.c.y < term.row-1)
1405 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1406 break;
1407 case 1: /* above */
1408 if(term.c.y > 1)
1409 tclearregion(0, 0, term.col-1, term.c.y-1);
1410 tclearregion(0, term.c.y, term.c.x, term.c.y);
1411 break;
1412 case 2: /* all */
1413 tclearregion(0, 0, term.col-1, term.row-1);
1414 break;
1415 default:
1416 goto unknown;
1417 }
1418 break;
1419 case 'K': /* EL -- Clear line */
1420 switch(csiescseq.arg[0]) {
1421 case 0: /* right */
1422 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1423 break;
1424 case 1: /* left */
1425 tclearregion(0, term.c.y, term.c.x, term.c.y);
1426 break;
1427 case 2: /* all */
1428 tclearregion(0, term.c.y, term.col-1, term.c.y);
1429 break;
1430 }
1431 break;
1432 case 'S': /* SU -- Scroll <n> line up */
1433 DEFAULT(csiescseq.arg[0], 1);
1434 tscrollup(term.top, csiescseq.arg[0]);
1435 break;
1436 case 'T': /* SD -- Scroll <n> line down */
1437 DEFAULT(csiescseq.arg[0], 1);
1438 tscrolldown(term.top, csiescseq.arg[0]);
1439 break;
1440 case 'L': /* IL -- Insert <n> blank lines */
1441 DEFAULT(csiescseq.arg[0], 1);
1442 tinsertblankline(csiescseq.arg[0]);
1443 break;
1444 case 'l': /* RM -- Reset Mode */
1445 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1446 break;
1447 case 'M': /* DL -- Delete <n> lines */
1448 DEFAULT(csiescseq.arg[0], 1);
1449 tdeleteline(csiescseq.arg[0]);
1450 break;
1451 case 'X': /* ECH -- Erase <n> char */
1452 DEFAULT(csiescseq.arg[0], 1);
1453 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
1454 break;
1455 case 'P': /* DCH -- Delete <n> char */
1456 DEFAULT(csiescseq.arg[0], 1);
1457 tdeletechar(csiescseq.arg[0]);
1458 break;
1459 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1460 DEFAULT(csiescseq.arg[0], 1);
1461 while(csiescseq.arg[0]--)
1462 tputtab(0);
1463 break;
1464 case 'd': /* VPA -- Move to <row> */
1465 DEFAULT(csiescseq.arg[0], 1);
1466 tmoveto(term.c.x, csiescseq.arg[0]-1);
1467 break;
1468 case 'h': /* SM -- Set terminal mode */
1469 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1470 break;
1471 case 'm': /* SGR -- Terminal attribute (color) */
1472 tsetattr(csiescseq.arg, csiescseq.narg);
1473 break;
1474 case 'r': /* DECSTBM -- Set Scrolling Region */
1475 if(csiescseq.priv)
1476 goto unknown;
1477 else {
1478 DEFAULT(csiescseq.arg[0], 1);
1479 DEFAULT(csiescseq.arg[1], term.row);
1480 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1481 tmoveto(0, 0);
1482 }
1483 break;
1484 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1485 tcursor(CURSOR_SAVE);
1486 break;
1487 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1488 tcursor(CURSOR_LOAD);
1489 break;
1490 }
1491 }
1492
1493 void
1494 csidump(void) {
1495 int i;
1496 printf("ESC[");
1497 for(i = 0; i < csiescseq.len; i++) {
1498 uint c = csiescseq.buf[i] & 0xff;
1499 if(isprint(c)) putchar(c);
1500 else if(c == '\n') printf("(\\n)");
1501 else if(c == '\r') printf("(\\r)");
1502 else if(c == 0x1b) printf("(\\e)");
1503 else printf("(%02x)", c);
1504 }
1505 putchar('\n');
1506 }
1507
1508 void
1509 csireset(void) {
1510 memset(&csiescseq, 0, sizeof(csiescseq));
1511 }
1512
1513 void
1514 strhandle(void) {
1515 char *p;
1516
1517 /*
1518 * TODO: make this being useful in case of color palette change.
1519 */
1520 strparse();
1521
1522 p = strescseq.buf;
1523
1524 switch(strescseq.type) {
1525 case ']': /* OSC -- Operating System Command */
1526 switch(p[0]) {
1527 case '0':
1528 case '1':
1529 case '2':
1530 /*
1531 * TODO: Handle special chars in string, like umlauts.
1532 */
1533 if(p[1] == ';') {
1534 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1535 }
1536 break;
1537 case ';':
1538 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1539 break;
1540 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1541 break;
1542 default:
1543 fprintf(stderr, "erresc: unknown str ");
1544 strdump();
1545 break;
1546 }
1547 break;
1548 case 'k': /* old title set compatibility */
1549 XStoreName(xw.dpy, xw.win, strescseq.buf);
1550 break;
1551 case 'P': /* DSC -- Device Control String */
1552 case '_': /* APC -- Application Program Command */
1553 case '^': /* PM -- Privacy Message */
1554 default:
1555 fprintf(stderr, "erresc: unknown str ");
1556 strdump();
1557 /* die(""); */
1558 break;
1559 }
1560 }
1561
1562 void
1563 strparse(void) {
1564 /*
1565 * TODO: Implement parsing like for CSI when required.
1566 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1567 */
1568 return;
1569 }
1570
1571 void
1572 strdump(void) {
1573 int i;
1574 printf("ESC%c", strescseq.type);
1575 for(i = 0; i < strescseq.len; i++) {
1576 uint c = strescseq.buf[i] & 0xff;
1577 if(isprint(c)) putchar(c);
1578 else if(c == '\n') printf("(\\n)");
1579 else if(c == '\r') printf("(\\r)");
1580 else if(c == 0x1b) printf("(\\e)");
1581 else printf("(%02x)", c);
1582 }
1583 printf("ESC\\\n");
1584 }
1585
1586 void
1587 strreset(void) {
1588 memset(&strescseq, 0, sizeof(strescseq));
1589 }
1590
1591 void
1592 tputtab(bool forward) {
1593 unsigned x = term.c.x;
1594
1595 if(forward) {
1596 if(x == term.col)
1597 return;
1598 for(++x; x < term.col && !term.tabs[x]; ++x)
1599 /* nothing */ ;
1600 } else {
1601 if(x == 0)
1602 return;
1603 for(--x; x > 0 && !term.tabs[x]; --x)
1604 /* nothing */ ;
1605 }
1606 tmoveto(x, term.c.y);
1607 }
1608
1609 void
1610 tputc(char *c) {
1611 char ascii = *c;
1612
1613 if(iofd != -1)
1614 write(iofd, c, 1);
1615
1616 if(term.esc & ESC_START) {
1617 if(term.esc & ESC_CSI) {
1618 csiescseq.buf[csiescseq.len++] = ascii;
1619 if(BETWEEN(ascii, 0x40, 0x7E) || csiescseq.len >= ESC_BUF_SIZ) {
1620 term.esc = 0;
1621 csiparse(), csihandle();
1622 }
1623 } else if(term.esc & ESC_STR) {
1624 switch(ascii) {
1625 case '\033':
1626 term.esc = ESC_START | ESC_STR_END;
1627 break;
1628 case '\a': /* backwards compatibility to xterm */
1629 term.esc = 0;
1630 strhandle();
1631 break;
1632 default:
1633 strescseq.buf[strescseq.len++] = ascii;
1634 if(strescseq.len+1 >= STR_BUF_SIZ) {
1635 term.esc = 0;
1636 strhandle();
1637 }
1638 }
1639 } else if(term.esc & ESC_STR_END) {
1640 term.esc = 0;
1641 if(ascii == '\\')
1642 strhandle();
1643 } else if(term.esc & ESC_ALTCHARSET) {
1644 switch(ascii) {
1645 case '0': /* Line drawing crap */
1646 term.c.attr.mode |= ATTR_GFX;
1647 break;
1648 case 'B': /* Back to regular text */
1649 term.c.attr.mode &= ~ATTR_GFX;
1650 break;
1651 default:
1652 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1653 }
1654 term.esc = 0;
1655 } else {
1656 switch(ascii) {
1657 case '[':
1658 term.esc |= ESC_CSI;
1659 break;
1660 case 'P': /* DCS -- Device Control String */
1661 case '_': /* APC -- Application Program Command */
1662 case '^': /* PM -- Privacy Message */
1663 case ']': /* OSC -- Operating System Command */
1664 case 'k': /* old title set compatibility */
1665 strreset();
1666 strescseq.type = ascii;
1667 term.esc |= ESC_STR;
1668 break;
1669 case '(':
1670 term.esc |= ESC_ALTCHARSET;
1671 break;
1672 case 'D': /* IND -- Linefeed */
1673 if(term.c.y == term.bot)
1674 tscrollup(term.top, 1);
1675 else
1676 tmoveto(term.c.x, term.c.y+1);
1677 term.esc = 0;
1678 break;
1679 case 'E': /* NEL -- Next line */
1680 tnewline(1); /* always go to first col */
1681 term.esc = 0;
1682 break;
1683 case 'H': /* HTS -- Horizontal tab stop */
1684 term.tabs[term.c.x] = 1;
1685 term.esc = 0;
1686 break;
1687 case 'M': /* RI -- Reverse index */
1688 if(term.c.y == term.top)
1689 tscrolldown(term.top, 1);
1690 else
1691 tmoveto(term.c.x, term.c.y-1);
1692 term.esc = 0;
1693 break;
1694 case 'c': /* RIS -- Reset to inital state */
1695 treset();
1696 term.esc = 0;
1697 xresettitle();
1698 break;
1699 case '=': /* DECPAM -- Application keypad */
1700 term.mode |= MODE_APPKEYPAD;
1701 term.esc = 0;
1702 break;
1703 case '>': /* DECPNM -- Normal keypad */
1704 term.mode &= ~MODE_APPKEYPAD;
1705 term.esc = 0;
1706 break;
1707 case '7': /* DECSC -- Save Cursor */
1708 tcursor(CURSOR_SAVE);
1709 term.esc = 0;
1710 break;
1711 case '8': /* DECRC -- Restore Cursor */
1712 tcursor(CURSOR_LOAD);
1713 term.esc = 0;
1714 break;
1715 case '\\': /* ST -- Stop */
1716 term.esc = 0;
1717 break;
1718 default:
1719 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
1720 (uchar) ascii, isprint(ascii)?ascii:'.');
1721 term.esc = 0;
1722 }
1723 }
1724 } else {
1725 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
1726 sel.bx = -1;
1727 switch(ascii) {
1728 case '\0': /* padding character, do nothing */
1729 break;
1730 case '\t':
1731 tputtab(1);
1732 break;
1733 case '\b':
1734 tmoveto(term.c.x-1, term.c.y);
1735 break;
1736 case '\r':
1737 tmoveto(0, term.c.y);
1738 break;
1739 case '\f':
1740 case '\v':
1741 case '\n':
1742 /* go to first col if the mode is set */
1743 tnewline(IS_SET(MODE_CRLF));
1744 break;
1745 case '\a':
1746 if(!(xw.state & WIN_FOCUSED))
1747 xseturgency(1);
1748 break;
1749 case '\033':
1750 csireset();
1751 term.esc = ESC_START;
1752 break;
1753 default:
1754 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1755 tnewline(1); /* always go to first col */
1756 tsetchar(c);
1757 if(term.c.x+1 < term.col)
1758 tmoveto(term.c.x+1, term.c.y);
1759 else
1760 term.c.state |= CURSOR_WRAPNEXT;
1761 }
1762 }
1763 }
1764
1765 int
1766 tresize(int col, int row) {
1767 int i, x;
1768 int minrow = MIN(row, term.row);
1769 int mincol = MIN(col, term.col);
1770 int slide = term.c.y - row + 1;
1771
1772 if(col < 1 || row < 1)
1773 return 0;
1774
1775 /* free unneeded rows */
1776 i = 0;
1777 if(slide > 0) {
1778 /* slide screen to keep cursor where we expect it -
1779 * tscrollup would work here, but we can optimize to
1780 * memmove because we're freeing the earlier lines */
1781 for(/* i = 0 */; i < slide; i++) {
1782 free(term.line[i]);
1783 free(term.alt[i]);
1784 }
1785 memmove(term.line, term.line + slide, row * sizeof(Line));
1786 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1787 }
1788 for(i += row; i < term.row; i++) {
1789 free(term.line[i]);
1790 free(term.alt[i]);
1791 }
1792
1793 /* resize to new height */
1794 term.line = xrealloc(term.line, row * sizeof(Line));
1795 term.alt = xrealloc(term.alt, row * sizeof(Line));
1796 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
1797 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
1798
1799 /* resize each row to new width, zero-pad if needed */
1800 for(i = 0; i < minrow; i++) {
1801 term.dirty[i] = 1;
1802 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
1803 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
1804 for(x = mincol; x < col; x++) {
1805 term.line[i][x].state = 0;
1806 term.alt[i][x].state = 0;
1807 }
1808 }
1809
1810 /* allocate any new rows */
1811 for(/* i == minrow */; i < row; i++) {
1812 term.dirty[i] = 1;
1813 term.line[i] = xcalloc(col, sizeof(Glyph));
1814 term.alt [i] = xcalloc(col, sizeof(Glyph));
1815 }
1816 if(col > term.col) {
1817 bool *bp = term.tabs + term.col;
1818
1819 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
1820 while(--bp > term.tabs && !*bp)
1821 /* nothing */ ;
1822 for(bp += TAB; bp < term.tabs + col; bp += TAB)
1823 *bp = 1;
1824 }
1825 /* update terminal size */
1826 term.col = col, term.row = row;
1827 /* make use of the LIMIT in tmoveto */
1828 tmoveto(term.c.x, term.c.y);
1829 /* reset scrolling region */
1830 tsetscroll(0, row-1);
1831
1832 return (slide > 0);
1833 }
1834
1835 void
1836 xresize(int col, int row) {
1837 xw.w = MAX(1, 2*BORDER + col * xw.cw);
1838 xw.h = MAX(1, 2*BORDER + row * xw.ch);
1839 }
1840
1841 void
1842 xloadcols(void) {
1843 int i, r, g, b;
1844 XColor color;
1845 ulong white = WhitePixel(xw.dpy, xw.scr);
1846
1847 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
1848 for(i = 0; i < LEN(colorname); i++) {
1849 if(!colorname[i])
1850 continue;
1851 if(!XAllocNamedColor(xw.dpy, xw.cmap, colorname[i], &color, &color)) {
1852 dc.col[i] = white;
1853 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1854 } else
1855 dc.col[i] = color.pixel;
1856 }
1857
1858 /* load colors [16-255] ; same colors as xterm */
1859 for(i = 16, r = 0; r < 6; r++)
1860 for(g = 0; g < 6; g++)
1861 for(b = 0; b < 6; b++) {
1862 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1863 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1864 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1865 if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
1866 dc.col[i] = white;
1867 fprintf(stderr, "Could not allocate color %d\n", i);
1868 } else
1869 dc.col[i] = color.pixel;
1870 i++;
1871 }
1872
1873 for(r = 0; r < 24; r++, i++) {
1874 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1875 if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
1876 dc.col[i] = white;
1877 fprintf(stderr, "Could not allocate color %d\n", i);
1878 } else
1879 dc.col[i] = color.pixel;
1880 }
1881 }
1882
1883 void
1884 xclear(int x1, int y1, int x2, int y2) {
1885 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
1886 XFillRectangle(xw.dpy, xw.buf, dc.gc,
1887 BORDER + x1 * xw.cw, BORDER + y1 * xw.ch,
1888 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1889 }
1890
1891 void
1892 xhints(void) {
1893 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
1894 XWMHints wm = {.flags = InputHint, .input = 1};
1895 XSizeHints *sizeh = NULL;
1896
1897 sizeh = XAllocSizeHints();
1898 if(xw.isfixed == False) {
1899 sizeh->flags = PSize | PResizeInc | PBaseSize;
1900 sizeh->height = xw.h;
1901 sizeh->width = xw.w;
1902 sizeh->height_inc = xw.ch;
1903 sizeh->width_inc = xw.cw;
1904 sizeh->base_height = 2*BORDER;
1905 sizeh->base_width = 2*BORDER;
1906 } else {
1907 sizeh->flags = PMaxSize | PMinSize;
1908 sizeh->min_width = sizeh->max_width = xw.fw;
1909 sizeh->min_height = sizeh->max_height = xw.fh;
1910 }
1911
1912 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
1913 XFree(sizeh);
1914 }
1915
1916 XFontSet
1917 xinitfont(char *fontstr) {
1918 XFontSet set;
1919 char *def, **missing;
1920 int n;
1921
1922 missing = NULL;
1923 set = XCreateFontSet(xw.dpy, fontstr, &missing, &n, &def);
1924 if(missing) {
1925 while(n--)
1926 fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
1927 XFreeStringList(missing);
1928 }
1929 return set;
1930 }
1931
1932 void
1933 xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing) {
1934 XFontStruct **xfonts;
1935 char **font_names;
1936 int i, n;
1937
1938 *ascent = *descent = *lbearing = *rbearing = 0;
1939 n = XFontsOfFontSet(set, &xfonts, &font_names);
1940 for(i = 0; i < n; i++) {
1941 *ascent = MAX(*ascent, (*xfonts)->ascent);
1942 *descent = MAX(*descent, (*xfonts)->descent);
1943 *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
1944 *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
1945 xfonts++;
1946 }
1947 }
1948
1949 void
1950 initfonts(char *fontstr, char *bfontstr, char *ifontstr, char *ibfontstr) {
1951 if((dc.font.set = xinitfont(fontstr)) == NULL)
1952 die("Can't load font %s\n", fontstr);
1953 if((dc.bfont.set = xinitfont(bfontstr)) == NULL)
1954 die("Can't load bfont %s\n", bfontstr);
1955 if((dc.ifont.set = xinitfont(ifontstr)) == NULL)
1956 die("Can't load ifont %s\n", ifontstr);
1957 if((dc.ibfont.set = xinitfont(ibfontstr)) == NULL)
1958 die("Can't load ibfont %s\n", ibfontstr);
1959
1960 xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
1961 &dc.font.lbearing, &dc.font.rbearing);
1962 xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
1963 &dc.bfont.lbearing, &dc.bfont.rbearing);
1964 xgetfontinfo(dc.ifont.set, &dc.ifont.ascent, &dc.ifont.descent,
1965 &dc.ifont.lbearing, &dc.ifont.rbearing);
1966 xgetfontinfo(dc.ibfont.set, &dc.ibfont.ascent, &dc.ibfont.descent,
1967 &dc.ibfont.lbearing, &dc.ibfont.rbearing);
1968 }
1969
1970 void
1971 xinit(void) {
1972 XSetWindowAttributes attrs;
1973 Cursor cursor;
1974 Window parent;
1975 int sw, sh, major, minor;
1976
1977 if(!(xw.dpy = XOpenDisplay(NULL)))
1978 die("Can't open display\n");
1979 xw.scr = XDefaultScreen(xw.dpy);
1980
1981 /* font */
1982 initfonts(FONT, BOLDFONT, ITALICFONT, ITALICBOLDFONT);
1983
1984 /* XXX: Assuming same size for bold font */
1985 xw.cw = dc.font.rbearing - dc.font.lbearing;
1986 xw.ch = dc.font.ascent + dc.font.descent;
1987
1988 /* colors */
1989 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1990 xloadcols();
1991
1992 /* adjust fixed window geometry */
1993 if(xw.isfixed) {
1994 sw = DisplayWidth(xw.dpy, xw.scr);
1995 sh = DisplayHeight(xw.dpy, xw.scr);
1996 if(xw.fx < 0)
1997 xw.fx = sw + xw.fx - xw.fw - 1;
1998 if(xw.fy < 0)
1999 xw.fy = sh + xw.fy - xw.fh - 1;
2000
2001 xw.h = xw.fh;
2002 xw.w = xw.fw;
2003 } else {
2004 /* window - default size */
2005 xw.h = 2*BORDER + term.row * xw.ch;
2006 xw.w = 2*BORDER + term.col * xw.cw;
2007 xw.fx = 0;
2008 xw.fy = 0;
2009 }
2010
2011 attrs.background_pixel = dc.col[DefaultBG];
2012 attrs.border_pixel = dc.col[DefaultBG];
2013 attrs.bit_gravity = NorthWestGravity;
2014 attrs.event_mask = FocusChangeMask | KeyPressMask
2015 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2016 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2017 attrs.colormap = xw.cmap;
2018
2019 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
2020 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2021 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2022 XDefaultVisual(xw.dpy, xw.scr),
2023 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2024 | CWColormap,
2025 &attrs);
2026 if(!XdbeQueryExtension(xw.dpy, &major, &minor))
2027 die("Xdbe extension is not present\n");
2028 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
2029
2030 /* input methods */
2031 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
2032 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2033 | XIMStatusNothing, XNClientWindow, xw.win,
2034 XNFocusWindow, xw.win, NULL);
2035 /* gc */
2036 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
2037
2038 /* white cursor, black outline */
2039 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2040 XDefineCursor(xw.dpy, xw.win, cursor);
2041 XRecolorCursor(xw.dpy, cursor,
2042 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2043 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2044
2045 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2046
2047 xresettitle();
2048 XMapWindow(xw.dpy, xw.win);
2049 xhints();
2050 XSync(xw.dpy, 0);
2051 }
2052
2053 void
2054 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2055 int fg = base.fg, bg = base.bg, temp;
2056 int winx = BORDER+x*xw.cw, winy = BORDER+y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
2057 XFontSet fontset = dc.font.set;
2058 int i;
2059
2060 /* only switch default fg/bg if term is in RV mode */
2061 if(IS_SET(MODE_REVERSE)) {
2062 if(fg == DefaultFG)
2063 fg = DefaultBG;
2064 if(bg == DefaultBG)
2065 bg = DefaultFG;
2066 }
2067
2068 if(base.mode & ATTR_REVERSE)
2069 temp = fg, fg = bg, bg = temp;
2070
2071 if(base.mode & ATTR_BOLD) {
2072 fg += 8;
2073 fontset = dc.bfont.set;
2074 }
2075
2076 if(base.mode & ATTR_ITALIC)
2077 fontset = dc.ifont.set;
2078 if(base.mode & (ATTR_ITALIC|ATTR_ITALIC))
2079 fontset = dc.ibfont.set;
2080
2081 XSetBackground(xw.dpy, dc.gc, dc.col[bg]);
2082 XSetForeground(xw.dpy, dc.gc, dc.col[fg]);
2083
2084 if(base.mode & ATTR_GFX) {
2085 for(i = 0; i < bytelen; i++) {
2086 char c = gfx[(uint)s[i] % 256];
2087 if(c)
2088 s[i] = c;
2089 else if(s[i] > 0x5f)
2090 s[i] -= 0x5f;
2091 }
2092 }
2093
2094 XmbDrawImageString(xw.dpy, xw.buf, fontset, dc.gc, winx, winy, s, bytelen);
2095
2096 if(base.mode & ATTR_UNDERLINE)
2097 XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
2098 }
2099
2100 void
2101 xdrawcursor(void) {
2102 static int oldx = 0;
2103 static int oldy = 0;
2104 int sl;
2105 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
2106
2107 LIMIT(oldx, 0, term.col-1);
2108 LIMIT(oldy, 0, term.row-1);
2109
2110 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2111 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2112
2113 /* remove the old cursor */
2114 if(term.line[oldy][oldx].state & GLYPH_SET) {
2115 sl = utf8size(term.line[oldy][oldx].c);
2116 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
2117 } else
2118 xclear(oldx, oldy, oldx, oldy);
2119
2120 /* draw the new one */
2121 if(!(term.c.state & CURSOR_HIDE)) {
2122 if(!(xw.state & WIN_FOCUSED))
2123 g.bg = DefaultUCS;
2124
2125 if(IS_SET(MODE_REVERSE))
2126 g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
2127
2128 sl = utf8size(g.c);
2129 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2130 oldx = term.c.x, oldy = term.c.y;
2131 }
2132 }
2133
2134 void
2135 xresettitle(void) {
2136 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
2137 }
2138
2139 void
2140 redraw(void) {
2141 struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
2142 tfulldirt();
2143 draw();
2144 XSync(xw.dpy, False); /* necessary for a good tput flash */
2145 nanosleep(&tv, NULL);
2146 }
2147
2148 void
2149 draw() {
2150 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2151
2152 drawregion(0, 0, term.col, term.row);
2153 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2154 }
2155
2156 void
2157 drawregion(int x1, int y1, int x2, int y2) {
2158 int ic, ib, x, y, ox, sl;
2159 Glyph base, new;
2160 char buf[DRAW_BUF_SIZ];
2161 bool ena_sel = sel.bx != -1, alt = IS_SET(MODE_ALTSCREEN);
2162
2163 if((sel.alt && !alt) || (!sel.alt && alt))
2164 ena_sel = 0;
2165 if(!(xw.state & WIN_VISIBLE))
2166 return;
2167
2168 for(y = y1; y < y2; y++) {
2169 if(!term.dirty[y])
2170 continue;
2171 xclear(0, y, term.col, y);
2172 term.dirty[y] = 0;
2173 base = term.line[y][0];
2174 ic = ib = ox = 0;
2175 for(x = x1; x < x2; x++) {
2176 new = term.line[y][x];
2177 if(ena_sel && *(new.c) && selected(x, y))
2178 new.mode ^= ATTR_REVERSE;
2179 if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
2180 ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2181 xdraws(buf, base, ox, y, ic, ib);
2182 ic = ib = 0;
2183 }
2184 if(new.state & GLYPH_SET) {
2185 if(ib == 0) {
2186 ox = x;
2187 base = new;
2188 }
2189 sl = utf8size(new.c);
2190 memcpy(buf+ib, new.c, sl);
2191 ib += sl;
2192 ++ic;
2193 }
2194 }
2195 if(ib > 0)
2196 xdraws(buf, base, ox, y, ic, ib);
2197 }
2198 xdrawcursor();
2199 }
2200
2201 void
2202 expose(XEvent *ev) {
2203 XExposeEvent *e = &ev->xexpose;
2204 if(xw.state & WIN_REDRAW) {
2205 if(!e->count)
2206 xw.state &= ~WIN_REDRAW;
2207 }
2208 }
2209
2210 void
2211 visibility(XEvent *ev) {
2212 XVisibilityEvent *e = &ev->xvisibility;
2213 if(e->state == VisibilityFullyObscured)
2214 xw.state &= ~WIN_VISIBLE;
2215 else if(!(xw.state & WIN_VISIBLE))
2216 /* need a full redraw for next Expose, not just a buf copy */
2217 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2218 }
2219
2220 void
2221 unmap(XEvent *ev) {
2222 xw.state &= ~WIN_VISIBLE;
2223 }
2224
2225 void
2226 xseturgency(int add) {
2227 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2228 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2229 XSetWMHints(xw.dpy, xw.win, h);
2230 XFree(h);
2231 }
2232
2233 void
2234 focus(XEvent *ev) {
2235 if(ev->type == FocusIn) {
2236 xw.state |= WIN_FOCUSED;
2237 xseturgency(0);
2238 } else
2239 xw.state &= ~WIN_FOCUSED;
2240 }
2241
2242 char*
2243 kmap(KeySym k, uint state) {
2244 int i;
2245 state &= ~Mod2Mask;
2246 for(i = 0; i < LEN(key); i++) {
2247 uint mask = key[i].mask;
2248 if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
2249 return (char*)key[i].s;
2250 }
2251 return NULL;
2252 }
2253
2254 void
2255 kpress(XEvent *ev) {
2256 XKeyEvent *e = &ev->xkey;
2257 KeySym ksym;
2258 char buf[32];
2259 char *customkey;
2260 int len;
2261 int meta;
2262 int shift;
2263 Status status;
2264
2265 meta = e->state & Mod1Mask;
2266 shift = e->state & ShiftMask;
2267 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
2268
2269 /* 1. custom keys from config.h */
2270 if((customkey = kmap(ksym, e->state)))
2271 ttywrite(customkey, strlen(customkey));
2272 /* 2. hardcoded (overrides X lookup) */
2273 else
2274 switch(ksym) {
2275 case XK_Up:
2276 case XK_Down:
2277 case XK_Left:
2278 case XK_Right:
2279 /* XXX: shift up/down doesn't work */
2280 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
2281 ttywrite(buf, 3);
2282 break;
2283 case XK_Insert:
2284 if(shift)
2285 selpaste();
2286 break;
2287 case XK_Return:
2288 if(IS_SET(MODE_CRLF))
2289 ttywrite("\r\n", 2);
2290 else
2291 ttywrite("\r", 1);
2292 break;
2293 /* 3. X lookup */
2294 default:
2295 if(len > 0) {
2296 if(meta && len == 1)
2297 ttywrite("\033", 1);
2298 ttywrite(buf, len);
2299 }
2300 break;
2301 }
2302 }
2303
2304 void
2305 cmessage(XEvent *e) {
2306 /* See xembed specs
2307 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2308 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2309 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2310 xw.state |= WIN_FOCUSED;
2311 xseturgency(0);
2312 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2313 xw.state &= ~WIN_FOCUSED;
2314 }
2315 }
2316 }
2317
2318 void
2319 resize(XEvent *e) {
2320 int col, row;
2321
2322 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2323 return;
2324
2325 xw.w = e->xconfigure.width;
2326 xw.h = e->xconfigure.height;
2327 col = (xw.w - 2*BORDER) / xw.cw;
2328 row = (xw.h - 2*BORDER) / xw.ch;
2329 if(col == term.col && row == term.row)
2330 return;
2331 tresize(col, row);
2332 xresize(col, row);
2333 ttyresize(col, row);
2334 }
2335
2336 void
2337 run(void) {
2338 XEvent ev;
2339 fd_set rfd;
2340 int xfd = XConnectionNumber(xw.dpy), i;
2341 struct timeval drawtimeout, *tv = NULL;
2342
2343 for(i = 0;; i++) {
2344 FD_ZERO(&rfd);
2345 FD_SET(cmdfd, &rfd);
2346 FD_SET(xfd, &rfd);
2347 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
2348 if(errno == EINTR)
2349 continue;
2350 die("select failed: %s\n", SERRNO);
2351 }
2352
2353 /*
2354 * Stop after a certain number of reads so the user does not
2355 * feel like the system is stuttering.
2356 */
2357 if(i < 1000 && FD_ISSET(cmdfd, &rfd)) {
2358 ttyread();
2359
2360 /*
2361 * Just wait a bit so it isn't disturbing the
2362 * user and the system is able to write something.
2363 */
2364 drawtimeout.tv_sec = 0;
2365 drawtimeout.tv_usec = 5;
2366 tv = &drawtimeout;
2367 continue;
2368 }
2369 i = 0;
2370 tv = NULL;
2371
2372 while(XPending(xw.dpy)) {
2373 XNextEvent(xw.dpy, &ev);
2374 if(XFilterEvent(&ev, xw.win))
2375 continue;
2376 if(handler[ev.type])
2377 (handler[ev.type])(&ev);
2378 }
2379
2380 draw();
2381 XFlush(xw.dpy);
2382 }
2383 }
2384
2385 int
2386 main(int argc, char *argv[]) {
2387 int i, bitm, xr, yr;
2388 unsigned int wr, hr;
2389
2390 xw.fw = xw.fh = xw.fx = xw.fy = 0;
2391 xw.isfixed = False;
2392
2393 for(i = 1; i < argc; i++) {
2394 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2395 case 't':
2396 if(++i < argc) opt_title = argv[i];
2397 break;
2398 case 'c':
2399 if(++i < argc) opt_class = argv[i];
2400 break;
2401 case 'w':
2402 if(++i < argc) opt_embed = argv[i];
2403 break;
2404 case 'f':
2405 if(++i < argc) opt_io = argv[i];
2406 break;
2407 case 'e':
2408 /* eat every remaining arguments */
2409 if(++i < argc) opt_cmd = &argv[i];
2410 goto run;
2411 case 'g':
2412 if(++i >= argc)
2413 break;
2414
2415 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
2416 if(bitm & XValue)
2417 xw.fx = xr;
2418 if(bitm & YValue)
2419 xw.fy = yr;
2420 if(bitm & WidthValue)
2421 xw.fw = (int)wr;
2422 if(bitm & HeightValue)
2423 xw.fh = (int)hr;
2424 if(bitm & XNegative && xw.fx == 0)
2425 xw.fx = -1;
2426 if(bitm & XNegative && xw.fy == 0)
2427 xw.fy = -1;
2428
2429 if(xw.fh != 0 && xw.fw != 0)
2430 xw.isfixed = True;
2431 break;
2432 case 'v':
2433 default:
2434 die(USAGE);
2435 }
2436 }
2437
2438 run:
2439 setlocale(LC_CTYPE, "");
2440 tnew(80, 24);
2441 ttynew();
2442 xinit();
2443 selinit();
2444 run();
2445 return 0;
2446 }
2447