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