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Implementing line drawing right.
[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 #include <X11/Xft/Xft.h>
29 #define Glyph Glyph_
30 #define Font Font_
31
32 #if defined(__linux)
33 #include <pty.h>
34 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
35 #include <util.h>
36 #elif defined(__FreeBSD__) || defined(__DragonFly__)
37 #include <libutil.h>
38 #endif
39
40 #define USAGE \
41 "st " VERSION " (c) 2010-2012 st engineers\n" \
42 "usage: st [-t title] [-c class] [-g geometry]" \
43 " [-w windowid] [-v] [-f file] [-e command...]\n"
44
45 /* XEMBED messages */
46 #define XEMBED_FOCUS_IN 4
47 #define XEMBED_FOCUS_OUT 5
48
49 /* Arbitrary sizes */
50 #define ESC_BUF_SIZ 256
51 #define ESC_ARG_SIZ 16
52 #define STR_BUF_SIZ 256
53 #define STR_ARG_SIZ 16
54 #define DRAW_BUF_SIZ 20*1024
55 #define UTF_SIZ 4
56 #define XK_NO_MOD UINT_MAX
57 #define XK_ANY_MOD 0
58
59 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
60
61 #define SERRNO strerror(errno)
62 #define MIN(a, b) ((a) < (b) ? (a) : (b))
63 #define MAX(a, b) ((a) < (b) ? (b) : (a))
64 #define LEN(a) (sizeof(a) / sizeof(a[0]))
65 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
66 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
67 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
68 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
69 #define IS_SET(flag) (term.mode & (flag))
70 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
71 #define X2COL(x) (((x) - BORDER)/xw.cw)
72 #define Y2ROW(y) (((y) - BORDER)/xw.ch)
73
74 enum glyph_attribute {
75 ATTR_NULL = 0,
76 ATTR_REVERSE = 1,
77 ATTR_UNDERLINE = 2,
78 ATTR_BOLD = 4,
79 ATTR_GFX = 8,
80 ATTR_ITALIC = 16,
81 ATTR_BLINK = 32,
82 };
83
84 enum cursor_movement {
85 CURSOR_UP,
86 CURSOR_DOWN,
87 CURSOR_LEFT,
88 CURSOR_RIGHT,
89 CURSOR_SAVE,
90 CURSOR_LOAD
91 };
92
93 enum cursor_state {
94 CURSOR_DEFAULT = 0,
95 CURSOR_HIDE = 1,
96 CURSOR_WRAPNEXT = 2
97 };
98
99 enum glyph_state {
100 GLYPH_SET = 1,
101 GLYPH_DIRTY = 2
102 };
103
104 enum term_mode {
105 MODE_WRAP = 1,
106 MODE_INSERT = 2,
107 MODE_APPKEYPAD = 4,
108 MODE_ALTSCREEN = 8,
109 MODE_CRLF = 16,
110 MODE_MOUSEBTN = 32,
111 MODE_MOUSEMOTION = 64,
112 MODE_MOUSE = 32|64,
113 MODE_REVERSE = 128,
114 MODE_KBDLOCK = 256
115 };
116
117 enum escape_state {
118 ESC_START = 1,
119 ESC_CSI = 2,
120 ESC_STR = 4, /* DSC, OSC, PM, APC */
121 ESC_ALTCHARSET = 8,
122 ESC_STR_END = 16, /* a final string was encountered */
123 };
124
125 enum window_state {
126 WIN_VISIBLE = 1,
127 WIN_REDRAW = 2,
128 WIN_FOCUSED = 4
129 };
130
131 /* bit macro */
132 #undef B0
133 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
134
135 typedef unsigned char uchar;
136 typedef unsigned int uint;
137 typedef unsigned long ulong;
138 typedef unsigned short ushort;
139
140 typedef struct {
141 char c[UTF_SIZ]; /* character code */
142 uchar mode; /* attribute flags */
143 ushort fg; /* foreground */
144 ushort bg; /* background */
145 uchar state; /* state flags */
146 } Glyph;
147
148 typedef Glyph* Line;
149
150 typedef struct {
151 Glyph attr; /* current char attributes */
152 int x;
153 int y;
154 char state;
155 } TCursor;
156
157 /* CSI Escape sequence structs */
158 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
159 typedef struct {
160 char buf[ESC_BUF_SIZ]; /* raw string */
161 int len; /* raw string length */
162 char priv;
163 int arg[ESC_ARG_SIZ];
164 int narg; /* nb of args */
165 char mode;
166 } CSIEscape;
167
168 /* STR Escape sequence structs */
169 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
170 typedef struct {
171 char type; /* ESC type ... */
172 char buf[STR_BUF_SIZ]; /* raw string */
173 int len; /* raw string length */
174 char *args[STR_ARG_SIZ];
175 int narg; /* nb of args */
176 } STREscape;
177
178 /* Internal representation of the screen */
179 typedef struct {
180 int row; /* nb row */
181 int col; /* nb col */
182 Line* line; /* screen */
183 Line* alt; /* alternate screen */
184 bool* dirty; /* dirtyness of lines */
185 TCursor c; /* cursor */
186 int top; /* top scroll limit */
187 int bot; /* bottom scroll limit */
188 int mode; /* terminal mode flags */
189 int esc; /* escape state flags */
190 bool *tabs;
191 } Term;
192
193 /* Purely graphic info */
194 typedef struct {
195 Display* dpy;
196 Colormap cmap;
197 Window win;
198 XdbeBackBuffer buf;
199 Atom xembed;
200 XIM xim;
201 XIC xic;
202 XftDraw *xft_draw;
203 Visual *vis;
204 int scr;
205 bool isfixed; /* is fixed geometry? */
206 int fx, fy, fw, fh; /* fixed geometry */
207 int tw, th; /* tty width and height */
208 int w; /* window width */
209 int h; /* window height */
210 int ch; /* char height */
211 int cw; /* char width */
212 char state; /* focus, redraw, visible */
213 } XWindow;
214
215 typedef struct {
216 KeySym k;
217 uint mask;
218 char s[ESC_BUF_SIZ];
219 } Key;
220
221 /* TODO: use better name for vars... */
222 typedef struct {
223 int mode;
224 int bx, by;
225 int ex, ey;
226 struct {int x, y;} b, e;
227 char *clip;
228 Atom xtarget;
229 bool alt;
230 struct timeval tclick1;
231 struct timeval tclick2;
232 } Selection;
233
234 #include "config.h"
235
236 /* Font structure */
237 typedef struct {
238 int ascent;
239 int descent;
240 short lbearing;
241 short rbearing;
242 XFontSet set;
243 XftFont* xft_set;
244 } Font;
245
246 /* Drawing Context */
247 typedef struct {
248 ulong col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
249 XftColor xft_col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
250 GC gc;
251 Font font, bfont, ifont, ibfont;
252 } DC;
253
254 static void die(const char*, ...);
255 static void draw(void);
256 static void redraw(void);
257 static void drawregion(int, int, int, int);
258 static void execsh(void);
259 static void sigchld(int);
260 static void run(void);
261
262 static void csidump(void);
263 static void csihandle(void);
264 static void csiparse(void);
265 static void csireset(void);
266 static void strdump(void);
267 static void strhandle(void);
268 static void strparse(void);
269 static void strreset(void);
270
271 static void tclearregion(int, int, int, int);
272 static void tcursor(int);
273 static void tdeletechar(int);
274 static void tdeleteline(int);
275 static void tinsertblank(int);
276 static void tinsertblankline(int);
277 static void tmoveto(int, int);
278 static void tnew(int, int);
279 static void tnewline(int);
280 static void tputtab(bool);
281 static void tputc(char*, int);
282 static void treset(void);
283 static int tresize(int, int);
284 static void tscrollup(int, int);
285 static void tscrolldown(int, int);
286 static void tsetattr(int*, int);
287 static void tsetchar(char*);
288 static void tsetscroll(int, int);
289 static void tswapscreen(void);
290 static void tsetdirt(int, int);
291 static void tsetmode(bool, bool, int *, int);
292 static void tfulldirt(void);
293
294 static void ttynew(void);
295 static void ttyread(void);
296 static void ttyresize(void);
297 static void ttywrite(const char *, size_t);
298
299 static void xdraws(char *, Glyph, int, int, int, int);
300 static void xhints(void);
301 static void xclear(int, int, int, int);
302 static void xdrawcursor(void);
303 static void xinit(void);
304 static void xloadcols(void);
305 static void xresettitle(void);
306 static void xseturgency(int);
307 static void xsetsel(char*);
308 static void xresize(int, int);
309
310 static void expose(XEvent *);
311 static void visibility(XEvent *);
312 static void unmap(XEvent *);
313 static char* kmap(KeySym, uint);
314 static void kpress(XEvent *);
315 static void cmessage(XEvent *);
316 static void resize(XEvent *);
317 static void focus(XEvent *);
318 static void brelease(XEvent *);
319 static void bpress(XEvent *);
320 static void bmotion(XEvent *);
321 static void selnotify(XEvent *);
322 static void selclear(XEvent *);
323 static void selrequest(XEvent *);
324
325 static void selinit(void);
326 static inline bool selected(int, int);
327 static void selcopy(void);
328 static void selpaste(void);
329 static void selscroll(int, int);
330
331 static int utf8decode(char *, long *);
332 static int utf8encode(long *, char *);
333 static int utf8size(char *);
334 static int isfullutf8(char *, int);
335
336 static void *xmalloc(size_t);
337 static void *xrealloc(void *, size_t);
338 static void *xcalloc(size_t nmemb, size_t size);
339
340 static void (*handler[LASTEvent])(XEvent *) = {
341 [KeyPress] = kpress,
342 [ClientMessage] = cmessage,
343 [ConfigureNotify] = resize,
344 [VisibilityNotify] = visibility,
345 [UnmapNotify] = unmap,
346 [Expose] = expose,
347 [FocusIn] = focus,
348 [FocusOut] = focus,
349 [MotionNotify] = bmotion,
350 [ButtonPress] = bpress,
351 [ButtonRelease] = brelease,
352 [SelectionClear] = selclear,
353 [SelectionNotify] = selnotify,
354 [SelectionRequest] = selrequest,
355 };
356
357 /* Globals */
358 static DC dc;
359 static XWindow xw;
360 static Term term;
361 static CSIEscape csiescseq;
362 static STREscape strescseq;
363 static int cmdfd;
364 static pid_t pid;
365 static Selection sel;
366 static int iofd = -1;
367 static char **opt_cmd = NULL;
368 static char *opt_io = NULL;
369 static char *opt_title = NULL;
370 static char *opt_embed = NULL;
371 static char *opt_class = NULL;
372
373 void *
374 xmalloc(size_t len) {
375 void *p = malloc(len);
376 if(!p)
377 die("Out of memory\n");
378 return p;
379 }
380
381 void *
382 xrealloc(void *p, size_t len) {
383 if((p = realloc(p, len)) == NULL)
384 die("Out of memory\n");
385 return p;
386 }
387
388 void *
389 xcalloc(size_t nmemb, size_t size) {
390 void *p = calloc(nmemb, size);
391 if(!p)
392 die("Out of memory\n");
393 return p;
394 }
395
396 int
397 utf8decode(char *s, long *u) {
398 uchar c;
399 int i, n, rtn;
400
401 rtn = 1;
402 c = *s;
403 if(~c & B7) { /* 0xxxxxxx */
404 *u = c;
405 return rtn;
406 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
407 *u = c&(B4|B3|B2|B1|B0);
408 n = 1;
409 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
410 *u = c&(B3|B2|B1|B0);
411 n = 2;
412 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
413 *u = c & (B2|B1|B0);
414 n = 3;
415 } else
416 goto invalid;
417 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
418 c = *s;
419 if((c & (B7|B6)) != B7) /* 10xxxxxx */
420 goto invalid;
421 *u <<= 6;
422 *u |= c & (B5|B4|B3|B2|B1|B0);
423 }
424 if((n == 1 && *u < 0x80) ||
425 (n == 2 && *u < 0x800) ||
426 (n == 3 && *u < 0x10000) ||
427 (*u >= 0xD800 && *u <= 0xDFFF))
428 goto invalid;
429 return rtn;
430 invalid:
431 *u = 0xFFFD;
432 return rtn;
433 }
434
435 int
436 utf8encode(long *u, char *s) {
437 uchar *sp;
438 ulong uc;
439 int i, n;
440
441 sp = (uchar*) s;
442 uc = *u;
443 if(uc < 0x80) {
444 *sp = uc; /* 0xxxxxxx */
445 return 1;
446 } else if(*u < 0x800) {
447 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
448 n = 1;
449 } else if(uc < 0x10000) {
450 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
451 n = 2;
452 } else if(uc <= 0x10FFFF) {
453 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
454 n = 3;
455 } else {
456 goto invalid;
457 }
458 for(i=n,++sp; i>0; --i,++sp)
459 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
460 return n+1;
461 invalid:
462 /* U+FFFD */
463 *s++ = '\xEF';
464 *s++ = '\xBF';
465 *s = '\xBD';
466 return 3;
467 }
468
469 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
470 UTF-8 otherwise return 0 */
471 int
472 isfullutf8(char *s, int b) {
473 uchar *c1, *c2, *c3;
474
475 c1 = (uchar *) s;
476 c2 = (uchar *) ++s;
477 c3 = (uchar *) ++s;
478 if(b < 1)
479 return 0;
480 else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
481 return 0;
482 else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
483 ((b == 1) ||
484 ((b == 2) && (*c2&(B7|B6)) == B7)))
485 return 0;
486 else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
487 ((b == 1) ||
488 ((b == 2) && (*c2&(B7|B6)) == B7) ||
489 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7)))
490 return 0;
491 else
492 return 1;
493 }
494
495 int
496 utf8size(char *s) {
497 uchar c = *s;
498
499 if(~c&B7)
500 return 1;
501 else if((c&(B7|B6|B5)) == (B7|B6))
502 return 2;
503 else if((c&(B7|B6|B5|B4)) == (B7|B6|B5))
504 return 3;
505 else
506 return 4;
507 }
508
509 void
510 selinit(void) {
511 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
512 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
513 sel.mode = 0;
514 sel.bx = -1;
515 sel.clip = NULL;
516 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
517 if(sel.xtarget == None)
518 sel.xtarget = XA_STRING;
519 }
520
521 static inline bool
522 selected(int x, int y) {
523 if(sel.ey == y && sel.by == y) {
524 int bx = MIN(sel.bx, sel.ex);
525 int ex = MAX(sel.bx, sel.ex);
526 return BETWEEN(x, bx, ex);
527 }
528 return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
529 || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
530 }
531
532 void
533 getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
534 if(b)
535 *b = e->xbutton.button;
536
537 *x = X2COL(e->xbutton.x);
538 *y = Y2ROW(e->xbutton.y);
539 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
540 sel.b.y = MIN(sel.by, sel.ey);
541 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
542 sel.e.y = MAX(sel.by, sel.ey);
543 }
544
545 void
546 mousereport(XEvent *e) {
547 int x = X2COL(e->xbutton.x);
548 int y = Y2ROW(e->xbutton.y);
549 int button = e->xbutton.button;
550 int state = e->xbutton.state;
551 char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
552 static int ob, ox, oy;
553
554 /* from urxvt */
555 if(e->xbutton.type == MotionNotify) {
556 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
557 return;
558 button = ob + 32;
559 ox = x, oy = y;
560 } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
561 button = 3;
562 } else {
563 button -= Button1;
564 if(button >= 3)
565 button += 64 - 3;
566 if(e->xbutton.type == ButtonPress) {
567 ob = button;
568 ox = x, oy = y;
569 }
570 }
571
572 buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
573 + (state & Mod4Mask ? 8 : 0)
574 + (state & ControlMask ? 16 : 0);
575
576 ttywrite(buf, sizeof(buf));
577 }
578
579 void
580 bpress(XEvent *e) {
581 if(IS_SET(MODE_MOUSE))
582 mousereport(e);
583 else if(e->xbutton.button == Button1) {
584 if(sel.bx != -1) {
585 sel.bx = -1;
586 tsetdirt(sel.b.y, sel.e.y);
587 draw();
588 }
589 sel.mode = 1;
590 sel.ex = sel.bx = X2COL(e->xbutton.x);
591 sel.ey = sel.by = Y2ROW(e->xbutton.y);
592 }
593 }
594
595 void
596 selcopy(void) {
597 char *str, *ptr;
598 int x, y, bufsize, is_selected = 0;
599
600 if(sel.bx == -1)
601 str = NULL;
602
603 else {
604 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
605 ptr = str = xmalloc(bufsize);
606
607 /* append every set & selected glyph to the selection */
608 for(y = 0; y < term.row; y++) {
609 for(x = 0; x < term.col; x++) {
610 int size;
611 char *p;
612 Glyph *gp = &term.line[y][x];
613
614 if(!(is_selected = selected(x, y)))
615 continue;
616 p = (gp->state & GLYPH_SET) ? gp->c : " ";
617 size = utf8size(p);
618 memcpy(ptr, p, size);
619 ptr += size;
620 }
621 /* \n at the end of every selected line except for the last one */
622 if(is_selected && y < sel.e.y)
623 *ptr++ = '\n';
624 }
625 *ptr = 0;
626 }
627 sel.alt = IS_SET(MODE_ALTSCREEN);
628 xsetsel(str);
629 }
630
631 void
632 selnotify(XEvent *e) {
633 ulong nitems, ofs, rem;
634 int format;
635 uchar *data;
636 Atom type;
637
638 ofs = 0;
639 do {
640 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
641 False, AnyPropertyType, &type, &format,
642 &nitems, &rem, &data)) {
643 fprintf(stderr, "Clipboard allocation failed\n");
644 return;
645 }
646 ttywrite((const char *) data, nitems * format / 8);
647 XFree(data);
648 /* number of 32-bit chunks returned */
649 ofs += nitems * format / 32;
650 } while(rem > 0);
651 }
652
653 void
654 selpaste() {
655 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY, xw.win, CurrentTime);
656 }
657
658 void selclear(XEvent *e) {
659 if(sel.bx == -1)
660 return;
661 sel.bx = -1;
662 tsetdirt(sel.b.y, sel.e.y);
663 }
664
665 void
666 selrequest(XEvent *e) {
667 XSelectionRequestEvent *xsre;
668 XSelectionEvent xev;
669 Atom xa_targets;
670
671 xsre = (XSelectionRequestEvent *) e;
672 xev.type = SelectionNotify;
673 xev.requestor = xsre->requestor;
674 xev.selection = xsre->selection;
675 xev.target = xsre->target;
676 xev.time = xsre->time;
677 /* reject */
678 xev.property = None;
679
680 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
681 if(xsre->target == xa_targets) {
682 /* respond with the supported type */
683 Atom string = sel.xtarget;
684 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
685 XA_ATOM, 32, PropModeReplace,
686 (uchar *) &string, 1);
687 xev.property = xsre->property;
688 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
689 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
690 xsre->target, 8, PropModeReplace,
691 (uchar *) sel.clip, strlen(sel.clip));
692 xev.property = xsre->property;
693 }
694
695 /* all done, send a notification to the listener */
696 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
697 fprintf(stderr, "Error sending SelectionNotify event\n");
698 }
699
700 void
701 xsetsel(char *str) {
702 /* register the selection for both the clipboard and the primary */
703 Atom clipboard;
704
705 free(sel.clip);
706 sel.clip = str;
707
708 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
709
710 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
711 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
712 }
713
714 void
715 brelease(XEvent *e) {
716 if(IS_SET(MODE_MOUSE)) {
717 mousereport(e);
718 return;
719 }
720 if(e->xbutton.button == Button2)
721 selpaste();
722 else if(e->xbutton.button == Button1) {
723 sel.mode = 0;
724 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
725 term.dirty[sel.ey] = 1;
726 if(sel.bx == sel.ex && sel.by == sel.ey) {
727 struct timeval now;
728 sel.bx = -1;
729 gettimeofday(&now, NULL);
730
731 if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
732 /* triple click on the line */
733 sel.b.x = sel.bx = 0;
734 sel.e.x = sel.ex = term.col;
735 sel.b.y = sel.e.y = sel.ey;
736 selcopy();
737 } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
738 /* double click to select word */
739 sel.bx = sel.ex;
740 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
741 term.line[sel.ey][sel.bx-1].c[0] != ' ') sel.bx--;
742 sel.b.x = sel.bx;
743 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
744 term.line[sel.ey][sel.ex+1].c[0] != ' ') sel.ex++;
745 sel.e.x = sel.ex;
746 sel.b.y = sel.e.y = sel.ey;
747 selcopy();
748 }
749 } else
750 selcopy();
751 }
752 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
753 gettimeofday(&sel.tclick1, NULL);
754 }
755
756 void
757 bmotion(XEvent *e) {
758 if(IS_SET(MODE_MOUSE)) {
759 mousereport(e);
760 return;
761 }
762 if(sel.mode) {
763 int oldey = sel.ey, oldex = sel.ex;
764 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
765
766 if(oldey != sel.ey || oldex != sel.ex) {
767 int starty = MIN(oldey, sel.ey);
768 int endy = MAX(oldey, sel.ey);
769 tsetdirt(starty, endy);
770 }
771 }
772 }
773
774 void
775 die(const char *errstr, ...) {
776 va_list ap;
777
778 va_start(ap, errstr);
779 vfprintf(stderr, errstr, ap);
780 va_end(ap);
781 exit(EXIT_FAILURE);
782 }
783
784 void
785 execsh(void) {
786 char **args;
787 char *envshell = getenv("SHELL");
788
789 unsetenv("COLUMNS");
790 unsetenv("LINES");
791 unsetenv("TERMCAP");
792
793 signal(SIGCHLD, SIG_DFL);
794 signal(SIGHUP, SIG_DFL);
795 signal(SIGINT, SIG_DFL);
796 signal(SIGQUIT, SIG_DFL);
797 signal(SIGTERM, SIG_DFL);
798 signal(SIGALRM, SIG_DFL);
799
800 DEFAULT(envshell, SHELL);
801 putenv("TERM="TNAME);
802 args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
803 execvp(args[0], args);
804 exit(EXIT_FAILURE);
805 }
806
807 void
808 sigchld(int a) {
809 int stat = 0;
810 if(waitpid(pid, &stat, 0) < 0)
811 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
812 if(WIFEXITED(stat))
813 exit(WEXITSTATUS(stat));
814 else
815 exit(EXIT_FAILURE);
816 }
817
818 void
819 ttynew(void) {
820 int m, s;
821
822 /* seems to work fine on linux, openbsd and freebsd */
823 struct winsize w = {term.row, term.col, 0, 0};
824 if(openpty(&m, &s, NULL, NULL, &w) < 0)
825 die("openpty failed: %s\n", SERRNO);
826
827 switch(pid = fork()) {
828 case -1:
829 die("fork failed\n");
830 break;
831 case 0:
832 setsid(); /* create a new process group */
833 dup2(s, STDIN_FILENO);
834 dup2(s, STDOUT_FILENO);
835 dup2(s, STDERR_FILENO);
836 if(ioctl(s, TIOCSCTTY, NULL) < 0)
837 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
838 close(s);
839 close(m);
840 execsh();
841 break;
842 default:
843 close(s);
844 cmdfd = m;
845 signal(SIGCHLD, sigchld);
846 if(opt_io) {
847 if(!strcmp(opt_io, "-")) {
848 iofd = STDOUT_FILENO;
849 } else {
850 if((iofd = open(opt_io, O_WRONLY | O_CREAT, 0666)) < 0) {
851 fprintf(stderr, "Error opening %s:%s\n",
852 opt_io, strerror(errno));
853 }
854 }
855 }
856 }
857 }
858
859 void
860 dump(char c) {
861 static int col;
862 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
863 if(++col % 10 == 0)
864 fprintf(stderr, "\n");
865 }
866
867 void
868 ttyread(void) {
869 static char buf[BUFSIZ];
870 static int buflen = 0;
871 char *ptr;
872 char s[UTF_SIZ];
873 int charsize; /* size of utf8 char in bytes */
874 long utf8c;
875 int ret;
876
877 /* append read bytes to unprocessed bytes */
878 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
879 die("Couldn't read from shell: %s\n", SERRNO);
880
881 /* process every complete utf8 char */
882 buflen += ret;
883 ptr = buf;
884 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
885 charsize = utf8decode(ptr, &utf8c);
886 utf8encode(&utf8c, s);
887 tputc(s, charsize);
888 ptr += charsize;
889 buflen -= charsize;
890 }
891
892 /* keep any uncomplete utf8 char for the next call */
893 memmove(buf, ptr, buflen);
894 }
895
896 void
897 ttywrite(const char *s, size_t n) {
898 if(write(cmdfd, s, n) == -1)
899 die("write error on tty: %s\n", SERRNO);
900 }
901
902 void
903 ttyresize(void) {
904 struct winsize w;
905
906 w.ws_row = term.row;
907 w.ws_col = term.col;
908 w.ws_xpixel = xw.tw;
909 w.ws_ypixel = xw.th;
910 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
911 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
912 }
913
914 void
915 tsetdirt(int top, int bot)
916 {
917 int i;
918
919 LIMIT(top, 0, term.row-1);
920 LIMIT(bot, 0, term.row-1);
921
922 for(i = top; i <= bot; i++)
923 term.dirty[i] = 1;
924 }
925
926 void
927 tfulldirt(void)
928 {
929 tsetdirt(0, term.row-1);
930 }
931
932 void
933 tcursor(int mode) {
934 static TCursor c;
935
936 if(mode == CURSOR_SAVE)
937 c = term.c;
938 else if(mode == CURSOR_LOAD)
939 term.c = c, tmoveto(c.x, c.y);
940 }
941
942 void
943 treset(void) {
944 uint i;
945 term.c = (TCursor){{
946 .mode = ATTR_NULL,
947 .fg = DefaultFG,
948 .bg = DefaultBG
949 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
950
951 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
952 for(i = TAB; i < term.col; i += TAB)
953 term.tabs[i] = 1;
954 term.top = 0, term.bot = term.row - 1;
955 term.mode = MODE_WRAP;
956
957 tclearregion(0, 0, term.col-1, term.row-1);
958 }
959
960 void
961 tnew(int col, int row) {
962 /* set screen size */
963 term.row = row, term.col = col;
964 term.line = xmalloc(term.row * sizeof(Line));
965 term.alt = xmalloc(term.row * sizeof(Line));
966 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
967 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
968
969 for(row = 0; row < term.row; row++) {
970 term.line[row] = xmalloc(term.col * sizeof(Glyph));
971 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
972 term.dirty[row] = 0;
973 }
974 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
975 /* setup screen */
976 treset();
977 }
978
979 void
980 tswapscreen(void) {
981 Line* tmp = term.line;
982 term.line = term.alt;
983 term.alt = tmp;
984 term.mode ^= MODE_ALTSCREEN;
985 tfulldirt();
986 }
987
988 void
989 tscrolldown(int orig, int n) {
990 int i;
991 Line temp;
992
993 LIMIT(n, 0, term.bot-orig+1);
994
995 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
996
997 for(i = term.bot; i >= orig+n; i--) {
998 temp = term.line[i];
999 term.line[i] = term.line[i-n];
1000 term.line[i-n] = temp;
1001
1002 term.dirty[i] = 1;
1003 term.dirty[i-n] = 1;
1004 }
1005
1006 selscroll(orig, n);
1007 }
1008
1009 void
1010 tscrollup(int orig, int n) {
1011 int i;
1012 Line temp;
1013 LIMIT(n, 0, term.bot-orig+1);
1014
1015 tclearregion(0, orig, term.col-1, orig+n-1);
1016
1017 for(i = orig; i <= term.bot-n; i++) {
1018 temp = term.line[i];
1019 term.line[i] = term.line[i+n];
1020 term.line[i+n] = temp;
1021
1022 term.dirty[i] = 1;
1023 term.dirty[i+n] = 1;
1024 }
1025
1026 selscroll(orig, -n);
1027 }
1028
1029 void
1030 selscroll(int orig, int n) {
1031 if(sel.bx == -1)
1032 return;
1033
1034 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1035 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1036 sel.bx = -1;
1037 return;
1038 }
1039 if(sel.by < term.top) {
1040 sel.by = term.top;
1041 sel.bx = 0;
1042 }
1043 if(sel.ey > term.bot) {
1044 sel.ey = term.bot;
1045 sel.ex = term.col;
1046 }
1047 sel.b.y = sel.by, sel.b.x = sel.bx;
1048 sel.e.y = sel.ey, sel.e.x = sel.ex;
1049 }
1050 }
1051
1052 void
1053 tnewline(int first_col) {
1054 int y = term.c.y;
1055 if(y == term.bot)
1056 tscrollup(term.top, 1);
1057 else
1058 y++;
1059 tmoveto(first_col ? 0 : term.c.x, y);
1060 }
1061
1062 void
1063 csiparse(void) {
1064 /* int noarg = 1; */
1065 char *p = csiescseq.buf;
1066
1067 csiescseq.narg = 0;
1068 if(*p == '?')
1069 csiescseq.priv = 1, p++;
1070
1071 while(p < csiescseq.buf+csiescseq.len) {
1072 while(isdigit(*p)) {
1073 csiescseq.arg[csiescseq.narg] *= 10;
1074 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1075 }
1076 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ)
1077 csiescseq.narg++, p++;
1078 else {
1079 csiescseq.mode = *p;
1080 csiescseq.narg++;
1081 return;
1082 }
1083 }
1084 }
1085
1086 void
1087 tmoveto(int x, int y) {
1088 LIMIT(x, 0, term.col-1);
1089 LIMIT(y, 0, term.row-1);
1090 term.c.state &= ~CURSOR_WRAPNEXT;
1091 term.c.x = x;
1092 term.c.y = y;
1093 }
1094
1095 void
1096 tsetchar(char *c) {
1097 /*
1098 * The table is proudly stolen from rxvt.
1099 */
1100 if(term.c.attr.mode & ATTR_GFX) {
1101 char *vt100_0[62] = { /* 0x41 - 0x7e */
1102 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1103 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1104 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1105 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1106 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1107 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1108 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1109 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1110 };
1111
1112 if(c[0] >= 0x41 && c[0] <= 0x7e
1113 && vt100_0[c[0] - 0x41]) {
1114 c = vt100_0[c[0] - 0x41];
1115 }
1116 }
1117
1118 term.dirty[term.c.y] = 1;
1119 term.line[term.c.y][term.c.x] = term.c.attr;
1120 memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
1121 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
1122 }
1123
1124 void
1125 tclearregion(int x1, int y1, int x2, int y2) {
1126 int x, y, temp;
1127
1128 if(x1 > x2)
1129 temp = x1, x1 = x2, x2 = temp;
1130 if(y1 > y2)
1131 temp = y1, y1 = y2, y2 = temp;
1132
1133 LIMIT(x1, 0, term.col-1);
1134 LIMIT(x2, 0, term.col-1);
1135 LIMIT(y1, 0, term.row-1);
1136 LIMIT(y2, 0, term.row-1);
1137
1138 for(y = y1; y <= y2; y++) {
1139 term.dirty[y] = 1;
1140 for(x = x1; x <= x2; x++)
1141 term.line[y][x].state = 0;
1142 }
1143 }
1144
1145 void
1146 tdeletechar(int n) {
1147 int src = term.c.x + n;
1148 int dst = term.c.x;
1149 int size = term.col - src;
1150
1151 term.dirty[term.c.y] = 1;
1152
1153 if(src >= term.col) {
1154 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1155 return;
1156 }
1157 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1158 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1159 }
1160
1161 void
1162 tinsertblank(int n) {
1163 int src = term.c.x;
1164 int dst = src + n;
1165 int size = term.col - dst;
1166
1167 term.dirty[term.c.y] = 1;
1168
1169 if(dst >= term.col) {
1170 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1171 return;
1172 }
1173 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1174 tclearregion(src, term.c.y, dst - 1, term.c.y);
1175 }
1176
1177 void
1178 tinsertblankline(int n) {
1179 if(term.c.y < term.top || term.c.y > term.bot)
1180 return;
1181
1182 tscrolldown(term.c.y, n);
1183 }
1184
1185 void
1186 tdeleteline(int n) {
1187 if(term.c.y < term.top || term.c.y > term.bot)
1188 return;
1189
1190 tscrollup(term.c.y, n);
1191 }
1192
1193 void
1194 tsetattr(int *attr, int l) {
1195 int i;
1196
1197 for(i = 0; i < l; i++) {
1198 switch(attr[i]) {
1199 case 0:
1200 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1201 | ATTR_ITALIC | ATTR_BLINK);
1202 term.c.attr.fg = DefaultFG;
1203 term.c.attr.bg = DefaultBG;
1204 break;
1205 case 1:
1206 term.c.attr.mode |= ATTR_BOLD;
1207 break;
1208 case 3: /* enter standout (highlight) */
1209 term.c.attr.mode |= ATTR_ITALIC;
1210 break;
1211 case 4:
1212 term.c.attr.mode |= ATTR_UNDERLINE;
1213 break;
1214 case 5:
1215 term.c.attr.mode |= ATTR_BLINK;
1216 break;
1217 case 7:
1218 term.c.attr.mode |= ATTR_REVERSE;
1219 break;
1220 case 21:
1221 case 22:
1222 term.c.attr.mode &= ~ATTR_BOLD;
1223 break;
1224 case 23: /* leave standout (highlight) mode */
1225 term.c.attr.mode &= ~ATTR_ITALIC;
1226 break;
1227 case 24:
1228 term.c.attr.mode &= ~ATTR_UNDERLINE;
1229 break;
1230 case 25:
1231 term.c.attr.mode &= ~ATTR_BLINK;
1232 break;
1233 case 27:
1234 term.c.attr.mode &= ~ATTR_REVERSE;
1235 break;
1236 case 38:
1237 if(i + 2 < l && attr[i + 1] == 5) {
1238 i += 2;
1239 if(BETWEEN(attr[i], 0, 255))
1240 term.c.attr.fg = attr[i];
1241 else
1242 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
1243 }
1244 else
1245 fprintf(stderr, "erresc(38): gfx attr %d unknown\n", attr[i]);
1246 break;
1247 case 39:
1248 term.c.attr.fg = DefaultFG;
1249 break;
1250 case 48:
1251 if(i + 2 < l && attr[i + 1] == 5) {
1252 i += 2;
1253 if(BETWEEN(attr[i], 0, 255))
1254 term.c.attr.bg = attr[i];
1255 else
1256 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
1257 }
1258 else
1259 fprintf(stderr, "erresc(48): gfx attr %d unknown\n", attr[i]);
1260 break;
1261 case 49:
1262 term.c.attr.bg = DefaultBG;
1263 break;
1264 default:
1265 if(BETWEEN(attr[i], 30, 37))
1266 term.c.attr.fg = attr[i] - 30;
1267 else if(BETWEEN(attr[i], 40, 47))
1268 term.c.attr.bg = attr[i] - 40;
1269 else if(BETWEEN(attr[i], 90, 97))
1270 term.c.attr.fg = attr[i] - 90 + 8;
1271 else if(BETWEEN(attr[i], 100, 107))
1272 term.c.attr.bg = attr[i] - 100 + 8;
1273 else
1274 fprintf(stderr, "erresc(default): gfx attr %d unknown\n", attr[i]), csidump();
1275 break;
1276 }
1277 }
1278 }
1279
1280 void
1281 tsetscroll(int t, int b) {
1282 int temp;
1283
1284 LIMIT(t, 0, term.row-1);
1285 LIMIT(b, 0, term.row-1);
1286 if(t > b) {
1287 temp = t;
1288 t = b;
1289 b = temp;
1290 }
1291 term.top = t;
1292 term.bot = b;
1293 }
1294
1295 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1296
1297 void
1298 tsetmode(bool priv, bool set, int *args, int narg) {
1299 int *lim, mode;
1300
1301 for(lim = args + narg; args < lim; ++args) {
1302 if(priv) {
1303 switch(*args) {
1304 break;
1305 case 1: /* DECCKM -- Cursor key */
1306 MODBIT(term.mode, set, MODE_APPKEYPAD);
1307 break;
1308 case 5: /* DECSCNM -- Reverve video */
1309 mode = term.mode;
1310 MODBIT(term.mode,set, MODE_REVERSE);
1311 if(mode != term.mode)
1312 redraw();
1313 break;
1314 case 6: /* XXX: DECOM -- Origin */
1315 break;
1316 case 7: /* DECAWM -- Auto wrap */
1317 MODBIT(term.mode, set, MODE_WRAP);
1318 break;
1319 case 8: /* XXX: DECARM -- Auto repeat */
1320 break;
1321 case 0: /* Error (IGNORED) */
1322 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1323 break;
1324 case 25:
1325 MODBIT(term.c.state, !set, CURSOR_HIDE);
1326 break;
1327 case 1000: /* 1000,1002: enable xterm mouse report */
1328 MODBIT(term.mode, set, MODE_MOUSEBTN);
1329 break;
1330 case 1002:
1331 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1332 break;
1333 case 1049: /* = 1047 and 1048 */
1334 case 47:
1335 case 1047:
1336 if(IS_SET(MODE_ALTSCREEN))
1337 tclearregion(0, 0, term.col-1, term.row-1);
1338 if((set && !IS_SET(MODE_ALTSCREEN)) ||
1339 (!set && IS_SET(MODE_ALTSCREEN))) {
1340 tswapscreen();
1341 }
1342 if(*args != 1049)
1343 break;
1344 /* pass through */
1345 case 1048:
1346 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1347 break;
1348 default:
1349 /* case 2: DECANM -- ANSI/VT52 (NOT SUPPOURTED) */
1350 /* case 3: DECCOLM -- Column (NOT SUPPORTED) */
1351 /* case 4: DECSCLM -- Scroll (NOT SUPPORTED) */
1352 /* case 18: DECPFF -- Printer feed (NOT SUPPORTED) */
1353 /* case 19: DECPEX -- Printer extent (NOT SUPPORTED) */
1354 /* case 42: DECNRCM -- National characters (NOT SUPPORTED) */
1355 fprintf(stderr,
1356 "erresc: unknown private set/reset mode %d\n",
1357 *args);
1358 break;
1359 }
1360 } else {
1361 switch(*args) {
1362 case 0: /* Error (IGNORED) */
1363 break;
1364 case 2: /* KAM -- keyboard action */
1365 MODBIT(term.mode, set, MODE_KBDLOCK);
1366 break;
1367 case 4: /* IRM -- Insertion-replacement */
1368 MODBIT(term.mode, set, MODE_INSERT);
1369 break;
1370 case 12: /* XXX: SRM -- Send/Receive */
1371 break;
1372 case 20: /* LNM -- Linefeed/new line */
1373 MODBIT(term.mode, set, MODE_CRLF);
1374 break;
1375 default:
1376 fprintf(stderr,
1377 "erresc: unknown set/reset mode %d\n",
1378 *args);
1379 break;
1380 }
1381 }
1382 }
1383 }
1384 #undef MODBIT
1385
1386
1387 void
1388 csihandle(void) {
1389 switch(csiescseq.mode) {
1390 default:
1391 unknown:
1392 fprintf(stderr, "erresc: unknown csi ");
1393 csidump();
1394 /* die(""); */
1395 break;
1396 case '@': /* ICH -- Insert <n> blank char */
1397 DEFAULT(csiescseq.arg[0], 1);
1398 tinsertblank(csiescseq.arg[0]);
1399 break;
1400 case 'A': /* CUU -- Cursor <n> Up */
1401 case 'e':
1402 DEFAULT(csiescseq.arg[0], 1);
1403 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1404 break;
1405 case 'B': /* CUD -- Cursor <n> Down */
1406 DEFAULT(csiescseq.arg[0], 1);
1407 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1408 break;
1409 case 'C': /* CUF -- Cursor <n> Forward */
1410 case 'a':
1411 DEFAULT(csiescseq.arg[0], 1);
1412 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1413 break;
1414 case 'D': /* CUB -- Cursor <n> Backward */
1415 DEFAULT(csiescseq.arg[0], 1);
1416 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1417 break;
1418 case 'E': /* CNL -- Cursor <n> Down and first col */
1419 DEFAULT(csiescseq.arg[0], 1);
1420 tmoveto(0, term.c.y+csiescseq.arg[0]);
1421 break;
1422 case 'F': /* CPL -- Cursor <n> Up and first col */
1423 DEFAULT(csiescseq.arg[0], 1);
1424 tmoveto(0, term.c.y-csiescseq.arg[0]);
1425 break;
1426 case 'g': /* TBC -- Tabulation clear */
1427 switch (csiescseq.arg[0]) {
1428 case 0: /* clear current tab stop */
1429 term.tabs[term.c.x] = 0;
1430 break;
1431 case 3: /* clear all the tabs */
1432 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1433 break;
1434 default:
1435 goto unknown;
1436 }
1437 break;
1438 case 'G': /* CHA -- Move to <col> */
1439 case '`': /* HPA */
1440 DEFAULT(csiescseq.arg[0], 1);
1441 tmoveto(csiescseq.arg[0]-1, term.c.y);
1442 break;
1443 case 'H': /* CUP -- Move to <row> <col> */
1444 case 'f': /* HVP */
1445 DEFAULT(csiescseq.arg[0], 1);
1446 DEFAULT(csiescseq.arg[1], 1);
1447 tmoveto(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1448 break;
1449 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1450 DEFAULT(csiescseq.arg[0], 1);
1451 while(csiescseq.arg[0]--)
1452 tputtab(1);
1453 break;
1454 case 'J': /* ED -- Clear screen */
1455 sel.bx = -1;
1456 switch(csiescseq.arg[0]) {
1457 case 0: /* below */
1458 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1459 if(term.c.y < term.row-1)
1460 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1461 break;
1462 case 1: /* above */
1463 if(term.c.y > 1)
1464 tclearregion(0, 0, term.col-1, term.c.y-1);
1465 tclearregion(0, term.c.y, term.c.x, term.c.y);
1466 break;
1467 case 2: /* all */
1468 tclearregion(0, 0, term.col-1, term.row-1);
1469 break;
1470 default:
1471 goto unknown;
1472 }
1473 break;
1474 case 'K': /* EL -- Clear line */
1475 switch(csiescseq.arg[0]) {
1476 case 0: /* right */
1477 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1478 break;
1479 case 1: /* left */
1480 tclearregion(0, term.c.y, term.c.x, term.c.y);
1481 break;
1482 case 2: /* all */
1483 tclearregion(0, term.c.y, term.col-1, term.c.y);
1484 break;
1485 }
1486 break;
1487 case 'S': /* SU -- Scroll <n> line up */
1488 DEFAULT(csiescseq.arg[0], 1);
1489 tscrollup(term.top, csiescseq.arg[0]);
1490 break;
1491 case 'T': /* SD -- Scroll <n> line down */
1492 DEFAULT(csiescseq.arg[0], 1);
1493 tscrolldown(term.top, csiescseq.arg[0]);
1494 break;
1495 case 'L': /* IL -- Insert <n> blank lines */
1496 DEFAULT(csiescseq.arg[0], 1);
1497 tinsertblankline(csiescseq.arg[0]);
1498 break;
1499 case 'l': /* RM -- Reset Mode */
1500 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1501 break;
1502 case 'M': /* DL -- Delete <n> lines */
1503 DEFAULT(csiescseq.arg[0], 1);
1504 tdeleteline(csiescseq.arg[0]);
1505 break;
1506 case 'X': /* ECH -- Erase <n> char */
1507 DEFAULT(csiescseq.arg[0], 1);
1508 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
1509 break;
1510 case 'P': /* DCH -- Delete <n> char */
1511 DEFAULT(csiescseq.arg[0], 1);
1512 tdeletechar(csiescseq.arg[0]);
1513 break;
1514 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1515 DEFAULT(csiescseq.arg[0], 1);
1516 while(csiescseq.arg[0]--)
1517 tputtab(0);
1518 break;
1519 case 'd': /* VPA -- Move to <row> */
1520 DEFAULT(csiescseq.arg[0], 1);
1521 tmoveto(term.c.x, csiescseq.arg[0]-1);
1522 break;
1523 case 'h': /* SM -- Set terminal mode */
1524 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1525 break;
1526 case 'm': /* SGR -- Terminal attribute (color) */
1527 tsetattr(csiescseq.arg, csiescseq.narg);
1528 break;
1529 case 'r': /* DECSTBM -- Set Scrolling Region */
1530 if(csiescseq.priv)
1531 goto unknown;
1532 else {
1533 DEFAULT(csiescseq.arg[0], 1);
1534 DEFAULT(csiescseq.arg[1], term.row);
1535 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1536 tmoveto(0, 0);
1537 }
1538 break;
1539 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1540 tcursor(CURSOR_SAVE);
1541 break;
1542 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1543 tcursor(CURSOR_LOAD);
1544 break;
1545 }
1546 }
1547
1548 void
1549 csidump(void) {
1550 int i;
1551 printf("ESC[");
1552 for(i = 0; i < csiescseq.len; i++) {
1553 uint c = csiescseq.buf[i] & 0xff;
1554 if(isprint(c)) putchar(c);
1555 else if(c == '\n') printf("(\\n)");
1556 else if(c == '\r') printf("(\\r)");
1557 else if(c == 0x1b) printf("(\\e)");
1558 else printf("(%02x)", c);
1559 }
1560 putchar('\n');
1561 }
1562
1563 void
1564 csireset(void) {
1565 memset(&csiescseq, 0, sizeof(csiescseq));
1566 }
1567
1568 void
1569 strhandle(void) {
1570 char *p;
1571
1572 /*
1573 * TODO: make this being useful in case of color palette change.
1574 */
1575 strparse();
1576
1577 p = strescseq.buf;
1578
1579 switch(strescseq.type) {
1580 case ']': /* OSC -- Operating System Command */
1581 switch(p[0]) {
1582 case '0':
1583 case '1':
1584 case '2':
1585 /*
1586 * TODO: Handle special chars in string, like umlauts.
1587 */
1588 if(p[1] == ';') {
1589 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1590 }
1591 break;
1592 case ';':
1593 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1594 break;
1595 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1596 break;
1597 default:
1598 fprintf(stderr, "erresc: unknown str ");
1599 strdump();
1600 break;
1601 }
1602 break;
1603 case 'k': /* old title set compatibility */
1604 XStoreName(xw.dpy, xw.win, strescseq.buf);
1605 break;
1606 case 'P': /* DSC -- Device Control String */
1607 case '_': /* APC -- Application Program Command */
1608 case '^': /* PM -- Privacy Message */
1609 default:
1610 fprintf(stderr, "erresc: unknown str ");
1611 strdump();
1612 /* die(""); */
1613 break;
1614 }
1615 }
1616
1617 void
1618 strparse(void) {
1619 /*
1620 * TODO: Implement parsing like for CSI when required.
1621 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1622 */
1623 return;
1624 }
1625
1626 void
1627 strdump(void) {
1628 int i;
1629 printf("ESC%c", strescseq.type);
1630 for(i = 0; i < strescseq.len; i++) {
1631 uint c = strescseq.buf[i] & 0xff;
1632 if(isprint(c)) putchar(c);
1633 else if(c == '\n') printf("(\\n)");
1634 else if(c == '\r') printf("(\\r)");
1635 else if(c == 0x1b) printf("(\\e)");
1636 else printf("(%02x)", c);
1637 }
1638 printf("ESC\\\n");
1639 }
1640
1641 void
1642 strreset(void) {
1643 memset(&strescseq, 0, sizeof(strescseq));
1644 }
1645
1646 void
1647 tputtab(bool forward) {
1648 uint x = term.c.x;
1649
1650 if(forward) {
1651 if(x == term.col)
1652 return;
1653 for(++x; x < term.col && !term.tabs[x]; ++x)
1654 /* nothing */ ;
1655 } else {
1656 if(x == 0)
1657 return;
1658 for(--x; x > 0 && !term.tabs[x]; --x)
1659 /* nothing */ ;
1660 }
1661 tmoveto(x, term.c.y);
1662 }
1663
1664 void
1665 tputc(char *c, int len) {
1666 char ascii = *c;
1667
1668 if(iofd != -1)
1669 write(iofd, c, len);
1670
1671 if(term.esc & ESC_START) {
1672 if(term.esc & ESC_CSI) {
1673 csiescseq.buf[csiescseq.len++] = ascii;
1674 if(BETWEEN(ascii, 0x40, 0x7E) || csiescseq.len >= ESC_BUF_SIZ) {
1675 term.esc = 0;
1676 csiparse(), csihandle();
1677 }
1678 } else if(term.esc & ESC_STR) {
1679 switch(ascii) {
1680 case '\033':
1681 term.esc = ESC_START | ESC_STR_END;
1682 break;
1683 case '\a': /* backwards compatibility to xterm */
1684 term.esc = 0;
1685 strhandle();
1686 break;
1687 default:
1688 strescseq.buf[strescseq.len++] = ascii;
1689 if(strescseq.len+1 >= STR_BUF_SIZ) {
1690 term.esc = 0;
1691 strhandle();
1692 }
1693 }
1694 } else if(term.esc & ESC_STR_END) {
1695 term.esc = 0;
1696 if(ascii == '\\')
1697 strhandle();
1698 } else if(term.esc & ESC_ALTCHARSET) {
1699 switch(ascii) {
1700 case '0': /* Line drawing set */
1701 term.c.attr.mode |= ATTR_GFX;
1702 break;
1703 case 'B': /* USASCII */
1704 term.c.attr.mode &= ~ATTR_GFX;
1705 break;
1706 case 'A': /* UK (IGNORED) */
1707 case '<': /* multinational charset (IGNORED) */
1708 case '5': /* Finnish (IGNORED) */
1709 case 'C': /* Finnish (IGNORED) */
1710 case 'K': /* German (IGNORED) */
1711 break;
1712 default:
1713 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1714 }
1715 term.esc = 0;
1716 } else {
1717 switch(ascii) {
1718 case '[':
1719 term.esc |= ESC_CSI;
1720 break;
1721 case 'P': /* DCS -- Device Control String */
1722 case '_': /* APC -- Application Program Command */
1723 case '^': /* PM -- Privacy Message */
1724 case ']': /* OSC -- Operating System Command */
1725 case 'k': /* old title set compatibility */
1726 strreset();
1727 strescseq.type = ascii;
1728 term.esc |= ESC_STR;
1729 break;
1730 case '(': /* set primary charset G0 */
1731 term.esc |= ESC_ALTCHARSET;
1732 break;
1733 case ')': /* set secondary charset G1 (IGNORED) */
1734 case '*': /* set tertiary charset G2 (IGNORED) */
1735 case '+': /* set quaternary charset G3 (IGNORED) */
1736 term.esc = 0;
1737 break;
1738 case 'D': /* IND -- Linefeed */
1739 if(term.c.y == term.bot)
1740 tscrollup(term.top, 1);
1741 else
1742 tmoveto(term.c.x, term.c.y+1);
1743 term.esc = 0;
1744 break;
1745 case 'E': /* NEL -- Next line */
1746 tnewline(1); /* always go to first col */
1747 term.esc = 0;
1748 break;
1749 case 'H': /* HTS -- Horizontal tab stop */
1750 term.tabs[term.c.x] = 1;
1751 term.esc = 0;
1752 break;
1753 case 'M': /* RI -- Reverse index */
1754 if(term.c.y == term.top)
1755 tscrolldown(term.top, 1);
1756 else
1757 tmoveto(term.c.x, term.c.y-1);
1758 term.esc = 0;
1759 break;
1760 case 'c': /* RIS -- Reset to inital state */
1761 treset();
1762 term.esc = 0;
1763 xclear(0, 0, xw.w, xw.h);
1764 xresettitle();
1765 break;
1766 case '=': /* DECPAM -- Application keypad */
1767 term.mode |= MODE_APPKEYPAD;
1768 term.esc = 0;
1769 break;
1770 case '>': /* DECPNM -- Normal keypad */
1771 term.mode &= ~MODE_APPKEYPAD;
1772 term.esc = 0;
1773 break;
1774 case '7': /* DECSC -- Save Cursor */
1775 tcursor(CURSOR_SAVE);
1776 term.esc = 0;
1777 break;
1778 case '8': /* DECRC -- Restore Cursor */
1779 tcursor(CURSOR_LOAD);
1780 term.esc = 0;
1781 break;
1782 case '\\': /* ST -- Stop */
1783 term.esc = 0;
1784 break;
1785 default:
1786 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
1787 (uchar) ascii, isprint(ascii)?ascii:'.');
1788 term.esc = 0;
1789 }
1790 }
1791 } else {
1792 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
1793 sel.bx = -1;
1794 switch(ascii) {
1795 case '\0': /* padding character, do nothing */
1796 break;
1797 case '\t':
1798 tputtab(1);
1799 break;
1800 case '\b':
1801 tmoveto(term.c.x-1, term.c.y);
1802 break;
1803 case '\r':
1804 tmoveto(0, term.c.y);
1805 break;
1806 case '\f':
1807 case '\v':
1808 case '\n':
1809 /* go to first col if the mode is set */
1810 tnewline(IS_SET(MODE_CRLF));
1811 break;
1812 case '\a':
1813 if(!(xw.state & WIN_FOCUSED))
1814 xseturgency(1);
1815 break;
1816 case '\033':
1817 csireset();
1818 term.esc = ESC_START;
1819 break;
1820 default:
1821 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1822 tnewline(1); /* always go to first col */
1823 tsetchar(c);
1824 if(term.c.x+1 < term.col)
1825 tmoveto(term.c.x+1, term.c.y);
1826 else
1827 term.c.state |= CURSOR_WRAPNEXT;
1828 }
1829 }
1830 }
1831
1832 int
1833 tresize(int col, int row) {
1834 int i, x;
1835 int minrow = MIN(row, term.row);
1836 int mincol = MIN(col, term.col);
1837 int slide = term.c.y - row + 1;
1838
1839 if(col < 1 || row < 1)
1840 return 0;
1841
1842 /* free unneeded rows */
1843 i = 0;
1844 if(slide > 0) {
1845 /* slide screen to keep cursor where we expect it -
1846 * tscrollup would work here, but we can optimize to
1847 * memmove because we're freeing the earlier lines */
1848 for(/* i = 0 */; i < slide; i++) {
1849 free(term.line[i]);
1850 free(term.alt[i]);
1851 }
1852 memmove(term.line, term.line + slide, row * sizeof(Line));
1853 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1854 }
1855 for(i += row; i < term.row; i++) {
1856 free(term.line[i]);
1857 free(term.alt[i]);
1858 }
1859
1860 /* resize to new height */
1861 term.line = xrealloc(term.line, row * sizeof(Line));
1862 term.alt = xrealloc(term.alt, row * sizeof(Line));
1863 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
1864 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
1865
1866 /* resize each row to new width, zero-pad if needed */
1867 for(i = 0; i < minrow; i++) {
1868 term.dirty[i] = 1;
1869 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
1870 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
1871 for(x = mincol; x < col; x++) {
1872 term.line[i][x].state = 0;
1873 term.alt[i][x].state = 0;
1874 }
1875 }
1876
1877 /* allocate any new rows */
1878 for(/* i == minrow */; i < row; i++) {
1879 term.dirty[i] = 1;
1880 term.line[i] = xcalloc(col, sizeof(Glyph));
1881 term.alt [i] = xcalloc(col, sizeof(Glyph));
1882 }
1883 if(col > term.col) {
1884 bool *bp = term.tabs + term.col;
1885
1886 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
1887 while(--bp > term.tabs && !*bp)
1888 /* nothing */ ;
1889 for(bp += TAB; bp < term.tabs + col; bp += TAB)
1890 *bp = 1;
1891 }
1892 /* update terminal size */
1893 term.col = col, term.row = row;
1894 /* make use of the LIMIT in tmoveto */
1895 tmoveto(term.c.x, term.c.y);
1896 /* reset scrolling region */
1897 tsetscroll(0, row-1);
1898
1899 return (slide > 0);
1900 }
1901
1902 void
1903 xresize(int col, int row) {
1904 xw.tw = MAX(1, 2*BORDER + col * xw.cw);
1905 xw.th = MAX(1, 2*BORDER + row * xw.ch);
1906
1907 XftDrawChange(xw.xft_draw, xw.buf);
1908 }
1909
1910 void
1911 xloadcols(void) {
1912 int i, r, g, b;
1913 XRenderColor xft_color = { .alpha = 0 };
1914 ulong white = WhitePixel(xw.dpy, xw.scr);
1915
1916 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
1917 for(i = 0; i < LEN(colorname); i++) {
1918 if(!colorname[i])
1919 continue;
1920 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.xft_col[i])) {
1921 dc.col[i] = white;
1922 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1923 } else
1924 dc.col[i] = dc.xft_col[i].pixel;
1925 }
1926
1927 /* load colors [16-255] ; same colors as xterm */
1928 for(i = 16, r = 0; r < 6; r++)
1929 for(g = 0; g < 6; g++)
1930 for(b = 0; b < 6; b++) {
1931 xft_color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1932 xft_color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1933 xft_color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1934 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &xft_color, &dc.xft_col[i])) {
1935 dc.col[i] = white;
1936 fprintf(stderr, "Could not allocate color %d\n", i);
1937 } else
1938 dc.col[i] = dc.xft_col[i].pixel;
1939 i++;
1940 }
1941
1942 for(r = 0; r < 24; r++, i++) {
1943 xft_color.red = xft_color.green = xft_color.blue = 0x0808 + 0x0a0a * r;
1944 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &xft_color, &dc.xft_col[i])) {
1945 dc.col[i] = white;
1946 fprintf(stderr, "Could not allocate color %d\n", i);
1947 } else
1948 dc.col[i] = dc.xft_col[i].pixel;
1949 }
1950 }
1951
1952 void
1953 xclear(int x1, int y1, int x2, int y2) {
1954 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
1955 XFillRectangle(xw.dpy, xw.buf, dc.gc,
1956 BORDER + x1 * xw.cw, BORDER + y1 * xw.ch,
1957 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1958 }
1959
1960 void
1961 xhints(void) {
1962 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
1963 XWMHints wm = {.flags = InputHint, .input = 1};
1964 XSizeHints *sizeh = NULL;
1965
1966 sizeh = XAllocSizeHints();
1967 if(xw.isfixed == False) {
1968 sizeh->flags = PSize | PResizeInc | PBaseSize;
1969 sizeh->height = xw.h;
1970 sizeh->width = xw.w;
1971 sizeh->height_inc = xw.ch;
1972 sizeh->width_inc = xw.cw;
1973 sizeh->base_height = 2*BORDER;
1974 sizeh->base_width = 2*BORDER;
1975 } else {
1976 sizeh->flags = PMaxSize | PMinSize;
1977 sizeh->min_width = sizeh->max_width = xw.fw;
1978 sizeh->min_height = sizeh->max_height = xw.fh;
1979 }
1980
1981 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
1982 XFree(sizeh);
1983 }
1984
1985 void
1986 xinitfont(Font *f, char *fontstr) {
1987 f->xft_set = XftFontOpenName(xw.dpy, xw.scr, fontstr);
1988
1989 if(!f->xft_set)
1990 die("st: can't open font %s.\n", fontstr);
1991
1992 f->ascent = f->xft_set->ascent;
1993 f->descent = f->xft_set->descent;
1994 f->lbearing = 0;
1995 f->rbearing = f->xft_set->max_advance_width;
1996 }
1997
1998 void
1999 initfonts(char *fontstr, char *bfontstr, char *ifontstr, char *ibfontstr) {
2000 xinitfont(&dc.font, fontstr);
2001 xinitfont(&dc.bfont, bfontstr);
2002 xinitfont(&dc.ifont, ifontstr);
2003 xinitfont(&dc.ibfont, ibfontstr);
2004 }
2005
2006 void
2007 xinit(void) {
2008 XSetWindowAttributes attrs;
2009 Cursor cursor;
2010 Window parent;
2011 int sw, sh, major, minor;
2012
2013 if(!(xw.dpy = XOpenDisplay(NULL)))
2014 die("Can't open display\n");
2015 xw.scr = XDefaultScreen(xw.dpy);
2016 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2017
2018 /* font */
2019 initfonts(FONT, BOLDFONT, ITALICFONT, ITALICBOLDFONT);
2020
2021 /* XXX: Assuming same size for bold font */
2022 xw.cw = dc.font.rbearing - dc.font.lbearing;
2023 xw.ch = dc.font.ascent + dc.font.descent;
2024
2025 /* colors */
2026 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2027 xloadcols();
2028
2029 /* adjust fixed window geometry */
2030 if(xw.isfixed) {
2031 sw = DisplayWidth(xw.dpy, xw.scr);
2032 sh = DisplayHeight(xw.dpy, xw.scr);
2033 if(xw.fx < 0)
2034 xw.fx = sw + xw.fx - xw.fw - 1;
2035 if(xw.fy < 0)
2036 xw.fy = sh + xw.fy - xw.fh - 1;
2037
2038 xw.h = xw.fh;
2039 xw.w = xw.fw;
2040 } else {
2041 /* window - default size */
2042 xw.h = 2*BORDER + term.row * xw.ch;
2043 xw.w = 2*BORDER + term.col * xw.cw;
2044 xw.fx = 0;
2045 xw.fy = 0;
2046 }
2047
2048 attrs.background_pixel = dc.col[DefaultBG];
2049 attrs.border_pixel = dc.col[DefaultBG];
2050 attrs.bit_gravity = NorthWestGravity;
2051 attrs.event_mask = FocusChangeMask | KeyPressMask
2052 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2053 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2054 attrs.colormap = xw.cmap;
2055
2056 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
2057 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2058 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2059 xw.vis,
2060 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2061 | CWColormap,
2062 &attrs);
2063
2064 /* double buffering */
2065 if(!XdbeQueryExtension(xw.dpy, &major, &minor))
2066 die("Xdbe extension is not present\n");
2067 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
2068
2069 /* Xft rendering context */
2070 xw.xft_draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2071
2072 /* input methods */
2073 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
2074 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2075 | XIMStatusNothing, XNClientWindow, xw.win,
2076 XNFocusWindow, xw.win, NULL);
2077 /* gc */
2078 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
2079
2080 /* white cursor, black outline */
2081 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2082 XDefineCursor(xw.dpy, xw.win, cursor);
2083 XRecolorCursor(xw.dpy, cursor,
2084 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2085 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2086
2087 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2088
2089 xresettitle();
2090 XMapWindow(xw.dpy, xw.win);
2091 xhints();
2092 XSync(xw.dpy, 0);
2093 }
2094
2095 void
2096 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2097 int fg = base.fg, bg = base.bg, temp;
2098 int winx = BORDER+x*xw.cw, winy = BORDER+y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
2099 Font *font = &dc.font;
2100 XGlyphInfo extents;
2101
2102 /* only switch default fg/bg if term is in RV mode */
2103 if(IS_SET(MODE_REVERSE)) {
2104 if(fg == DefaultFG)
2105 fg = DefaultBG;
2106 if(bg == DefaultBG)
2107 bg = DefaultFG;
2108 }
2109
2110 if(base.mode & ATTR_REVERSE)
2111 temp = fg, fg = bg, bg = temp;
2112
2113 if(base.mode & ATTR_BOLD) {
2114 fg += 8;
2115 font = &dc.bfont;
2116 }
2117
2118 if(base.mode & ATTR_ITALIC)
2119 font = &dc.ifont;
2120 if(base.mode & (ATTR_ITALIC|ATTR_ITALIC))
2121 font = &dc.ibfont;
2122
2123 XSetBackground(xw.dpy, dc.gc, dc.col[bg]);
2124 XSetForeground(xw.dpy, dc.gc, dc.col[fg]);
2125
2126 XftTextExtentsUtf8(xw.dpy, font->xft_set, (FcChar8 *)s, bytelen, &extents);
2127 width = extents.xOff;
2128 XftDrawRect(xw.xft_draw, &dc.xft_col[bg], winx, winy - font->ascent, width, xw.ch);
2129 XftDrawStringUtf8(xw.xft_draw, &dc.xft_col[fg], font->xft_set, winx, winy, (FcChar8 *)s, bytelen);
2130
2131 if(base.mode & ATTR_UNDERLINE)
2132 XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
2133 }
2134
2135 void
2136 xdrawcursor(void) {
2137 static int oldx = 0;
2138 static int oldy = 0;
2139 int sl;
2140 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
2141
2142 LIMIT(oldx, 0, term.col-1);
2143 LIMIT(oldy, 0, term.row-1);
2144
2145 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2146 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2147
2148 /* remove the old cursor */
2149 if(term.line[oldy][oldx].state & GLYPH_SET) {
2150 sl = utf8size(term.line[oldy][oldx].c);
2151 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
2152 } else
2153 xclear(oldx, oldy, oldx, oldy);
2154
2155 /* draw the new one */
2156 if(!(term.c.state & CURSOR_HIDE)) {
2157 if(!(xw.state & WIN_FOCUSED))
2158 g.bg = DefaultUCS;
2159
2160 if(IS_SET(MODE_REVERSE))
2161 g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
2162
2163 sl = utf8size(g.c);
2164 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2165 oldx = term.c.x, oldy = term.c.y;
2166 }
2167 }
2168
2169 void
2170 xresettitle(void) {
2171 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
2172 }
2173
2174 void
2175 redraw(void) {
2176 struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
2177
2178 xclear(0, 0, xw.w, xw.h);
2179 tfulldirt();
2180 draw();
2181 XSync(xw.dpy, False); /* necessary for a good tput flash */
2182 nanosleep(&tv, NULL);
2183 }
2184
2185 void
2186 draw() {
2187 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2188
2189 drawregion(0, 0, term.col, term.row);
2190 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2191 }
2192
2193 void
2194 drawregion(int x1, int y1, int x2, int y2) {
2195 int ic, ib, x, y, ox, sl;
2196 Glyph base, new;
2197 char buf[DRAW_BUF_SIZ];
2198 bool ena_sel = sel.bx != -1, alt = IS_SET(MODE_ALTSCREEN);
2199
2200 if((sel.alt && !alt) || (!sel.alt && alt))
2201 ena_sel = 0;
2202 if(!(xw.state & WIN_VISIBLE))
2203 return;
2204
2205 for(y = y1; y < y2; y++) {
2206 if(!term.dirty[y])
2207 continue;
2208 xclear(0, y, term.col, y);
2209 term.dirty[y] = 0;
2210 base = term.line[y][0];
2211 ic = ib = ox = 0;
2212 for(x = x1; x < x2; x++) {
2213 new = term.line[y][x];
2214 if(ena_sel && *(new.c) && selected(x, y))
2215 new.mode ^= ATTR_REVERSE;
2216 if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
2217 ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2218 xdraws(buf, base, ox, y, ic, ib);
2219 ic = ib = 0;
2220 }
2221 if(new.state & GLYPH_SET) {
2222 if(ib == 0) {
2223 ox = x;
2224 base = new;
2225 }
2226 sl = utf8size(new.c);
2227 memcpy(buf+ib, new.c, sl);
2228 ib += sl;
2229 ++ic;
2230 }
2231 }
2232 if(ib > 0)
2233 xdraws(buf, base, ox, y, ic, ib);
2234 }
2235 xdrawcursor();
2236 }
2237
2238 void
2239 expose(XEvent *ev) {
2240 XExposeEvent *e = &ev->xexpose;
2241 if(xw.state & WIN_REDRAW) {
2242 if(!e->count)
2243 xw.state &= ~WIN_REDRAW;
2244 }
2245 }
2246
2247 void
2248 visibility(XEvent *ev) {
2249 XVisibilityEvent *e = &ev->xvisibility;
2250 if(e->state == VisibilityFullyObscured)
2251 xw.state &= ~WIN_VISIBLE;
2252 else if(!(xw.state & WIN_VISIBLE))
2253 /* need a full redraw for next Expose, not just a buf copy */
2254 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2255 }
2256
2257 void
2258 unmap(XEvent *ev) {
2259 xw.state &= ~WIN_VISIBLE;
2260 }
2261
2262 void
2263 xseturgency(int add) {
2264 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2265 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2266 XSetWMHints(xw.dpy, xw.win, h);
2267 XFree(h);
2268 }
2269
2270 void
2271 focus(XEvent *ev) {
2272 if(ev->type == FocusIn) {
2273 xw.state |= WIN_FOCUSED;
2274 xseturgency(0);
2275 } else
2276 xw.state &= ~WIN_FOCUSED;
2277 }
2278
2279 char*
2280 kmap(KeySym k, uint state) {
2281 int i;
2282 state &= ~Mod2Mask;
2283 for(i = 0; i < LEN(key); i++) {
2284 uint mask = key[i].mask;
2285 if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
2286 return (char*)key[i].s;
2287 }
2288 return NULL;
2289 }
2290
2291 void
2292 kpress(XEvent *ev) {
2293 XKeyEvent *e = &ev->xkey;
2294 KeySym ksym;
2295 char buf[32];
2296 char *customkey;
2297 int len;
2298 int meta;
2299 int shift;
2300 Status status;
2301
2302 if (IS_SET(MODE_KBDLOCK))
2303 return;
2304 meta = e->state & Mod1Mask;
2305 shift = e->state & ShiftMask;
2306 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
2307
2308 /* 1. custom keys from config.h */
2309 if((customkey = kmap(ksym, e->state)))
2310 ttywrite(customkey, strlen(customkey));
2311 /* 2. hardcoded (overrides X lookup) */
2312 else
2313 switch(ksym) {
2314 case XK_Up:
2315 case XK_Down:
2316 case XK_Left:
2317 case XK_Right:
2318 /* XXX: shift up/down doesn't work */
2319 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
2320 ttywrite(buf, 3);
2321 break;
2322 case XK_Insert:
2323 if(shift)
2324 selpaste();
2325 break;
2326 case XK_Return:
2327 if(IS_SET(MODE_CRLF))
2328 ttywrite("\r\n", 2);
2329 else
2330 ttywrite("\r", 1);
2331 break;
2332 /* 3. X lookup */
2333 default:
2334 if(len > 0) {
2335 if(meta && len == 1)
2336 ttywrite("\033", 1);
2337 ttywrite(buf, len);
2338 }
2339 break;
2340 }
2341 }
2342
2343 void
2344 cmessage(XEvent *e) {
2345 /* See xembed specs
2346 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2347 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2348 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2349 xw.state |= WIN_FOCUSED;
2350 xseturgency(0);
2351 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2352 xw.state &= ~WIN_FOCUSED;
2353 }
2354 }
2355 }
2356
2357 void
2358 resize(XEvent *e) {
2359 int col, row;
2360
2361 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2362 return;
2363
2364 xw.w = e->xconfigure.width;
2365 xw.h = e->xconfigure.height;
2366 col = (xw.w - 2*BORDER) / xw.cw;
2367 row = (xw.h - 2*BORDER) / xw.ch;
2368 if(col == term.col && row == term.row)
2369 return;
2370
2371 xclear(0, 0, xw.w, xw.h);
2372 tresize(col, row);
2373 xresize(col, row);
2374 ttyresize();
2375 }
2376
2377 void
2378 run(void) {
2379 XEvent ev;
2380 fd_set rfd;
2381 int xfd = XConnectionNumber(xw.dpy), i;
2382 struct timeval drawtimeout, *tv = NULL;
2383
2384 for(i = 0;; i++) {
2385 FD_ZERO(&rfd);
2386 FD_SET(cmdfd, &rfd);
2387 FD_SET(xfd, &rfd);
2388 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
2389 if(errno == EINTR)
2390 continue;
2391 die("select failed: %s\n", SERRNO);
2392 }
2393
2394 /*
2395 * Stop after a certain number of reads so the user does not
2396 * feel like the system is stuttering.
2397 */
2398 if(i < 1000 && FD_ISSET(cmdfd, &rfd)) {
2399 ttyread();
2400
2401 /*
2402 * Just wait a bit so it isn't disturbing the
2403 * user and the system is able to write something.
2404 */
2405 drawtimeout.tv_sec = 0;
2406 drawtimeout.tv_usec = 5;
2407 tv = &drawtimeout;
2408 continue;
2409 }
2410 i = 0;
2411 tv = NULL;
2412
2413 while(XPending(xw.dpy)) {
2414 XNextEvent(xw.dpy, &ev);
2415 if(XFilterEvent(&ev, xw.win))
2416 continue;
2417 if(handler[ev.type])
2418 (handler[ev.type])(&ev);
2419 }
2420
2421 draw();
2422 XFlush(xw.dpy);
2423 }
2424 }
2425
2426 int
2427 main(int argc, char *argv[]) {
2428 int i, bitm, xr, yr;
2429 uint wr, hr;
2430
2431 xw.fw = xw.fh = xw.fx = xw.fy = 0;
2432 xw.isfixed = False;
2433
2434 for(i = 1; i < argc; i++) {
2435 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2436 case 't':
2437 if(++i < argc) opt_title = argv[i];
2438 break;
2439 case 'c':
2440 if(++i < argc) opt_class = argv[i];
2441 break;
2442 case 'w':
2443 if(++i < argc) opt_embed = argv[i];
2444 break;
2445 case 'f':
2446 if(++i < argc) opt_io = argv[i];
2447 break;
2448 case 'e':
2449 /* eat every remaining arguments */
2450 if(++i < argc) opt_cmd = &argv[i];
2451 goto run;
2452 case 'g':
2453 if(++i >= argc)
2454 break;
2455
2456 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
2457 if(bitm & XValue)
2458 xw.fx = xr;
2459 if(bitm & YValue)
2460 xw.fy = yr;
2461 if(bitm & WidthValue)
2462 xw.fw = (int)wr;
2463 if(bitm & HeightValue)
2464 xw.fh = (int)hr;
2465 if(bitm & XNegative && xw.fx == 0)
2466 xw.fx = -1;
2467 if(bitm & XNegative && xw.fy == 0)
2468 xw.fy = -1;
2469
2470 if(xw.fh != 0 && xw.fw != 0)
2471 xw.isfixed = True;
2472 break;
2473 case 'v':
2474 default:
2475 die(USAGE);
2476 }
2477 }
2478
2479 run:
2480 setlocale(LC_CTYPE, "");
2481 tnew(80, 24);
2482 ttynew();
2483 xinit();
2484 selinit();
2485 run();
2486 return 0;
2487 }
2488