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A reset should reset the line drawing too.
[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 term.dirty[term.c.y] = 1;
1098 term.line[term.c.y][term.c.x] = term.c.attr;
1099 memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
1100 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
1101 }
1102
1103 void
1104 tclearregion(int x1, int y1, int x2, int y2) {
1105 int x, y, temp;
1106
1107 if(x1 > x2)
1108 temp = x1, x1 = x2, x2 = temp;
1109 if(y1 > y2)
1110 temp = y1, y1 = y2, y2 = temp;
1111
1112 LIMIT(x1, 0, term.col-1);
1113 LIMIT(x2, 0, term.col-1);
1114 LIMIT(y1, 0, term.row-1);
1115 LIMIT(y2, 0, term.row-1);
1116
1117 for(y = y1; y <= y2; y++) {
1118 term.dirty[y] = 1;
1119 for(x = x1; x <= x2; x++)
1120 term.line[y][x].state = 0;
1121 }
1122 }
1123
1124 void
1125 tdeletechar(int n) {
1126 int src = term.c.x + n;
1127 int dst = term.c.x;
1128 int size = term.col - src;
1129
1130 term.dirty[term.c.y] = 1;
1131
1132 if(src >= term.col) {
1133 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1134 return;
1135 }
1136 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1137 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1138 }
1139
1140 void
1141 tinsertblank(int n) {
1142 int src = term.c.x;
1143 int dst = src + n;
1144 int size = term.col - dst;
1145
1146 term.dirty[term.c.y] = 1;
1147
1148 if(dst >= term.col) {
1149 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1150 return;
1151 }
1152 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1153 tclearregion(src, term.c.y, dst - 1, term.c.y);
1154 }
1155
1156 void
1157 tinsertblankline(int n) {
1158 if(term.c.y < term.top || term.c.y > term.bot)
1159 return;
1160
1161 tscrolldown(term.c.y, n);
1162 }
1163
1164 void
1165 tdeleteline(int n) {
1166 if(term.c.y < term.top || term.c.y > term.bot)
1167 return;
1168
1169 tscrollup(term.c.y, n);
1170 }
1171
1172 void
1173 tsetattr(int *attr, int l) {
1174 int i;
1175
1176 for(i = 0; i < l; i++) {
1177 switch(attr[i]) {
1178 case 0:
1179 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1180 | ATTR_ITALIC | ATTR_BLINK | ATTR_GFX);
1181 term.c.attr.fg = DefaultFG;
1182 term.c.attr.bg = DefaultBG;
1183 break;
1184 case 1:
1185 term.c.attr.mode |= ATTR_BOLD;
1186 break;
1187 case 3: /* enter standout (highlight) */
1188 term.c.attr.mode |= ATTR_ITALIC;
1189 break;
1190 case 4:
1191 term.c.attr.mode |= ATTR_UNDERLINE;
1192 break;
1193 case 5:
1194 term.c.attr.mode |= ATTR_BLINK;
1195 break;
1196 case 7:
1197 term.c.attr.mode |= ATTR_REVERSE;
1198 break;
1199 case 21:
1200 case 22:
1201 term.c.attr.mode &= ~ATTR_BOLD;
1202 break;
1203 case 23: /* leave standout (highlight) mode */
1204 term.c.attr.mode &= ~ATTR_ITALIC;
1205 break;
1206 case 24:
1207 term.c.attr.mode &= ~ATTR_UNDERLINE;
1208 break;
1209 case 25:
1210 term.c.attr.mode &= ~ATTR_BLINK;
1211 break;
1212 case 27:
1213 term.c.attr.mode &= ~ATTR_REVERSE;
1214 break;
1215 case 38:
1216 if(i + 2 < l && attr[i + 1] == 5) {
1217 i += 2;
1218 if(BETWEEN(attr[i], 0, 255))
1219 term.c.attr.fg = attr[i];
1220 else
1221 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
1222 }
1223 else
1224 fprintf(stderr, "erresc(38): gfx attr %d unknown\n", attr[i]);
1225 break;
1226 case 39:
1227 term.c.attr.fg = DefaultFG;
1228 break;
1229 case 48:
1230 if(i + 2 < l && attr[i + 1] == 5) {
1231 i += 2;
1232 if(BETWEEN(attr[i], 0, 255))
1233 term.c.attr.bg = attr[i];
1234 else
1235 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
1236 }
1237 else
1238 fprintf(stderr, "erresc(48): gfx attr %d unknown\n", attr[i]);
1239 break;
1240 case 49:
1241 term.c.attr.bg = DefaultBG;
1242 break;
1243 default:
1244 if(BETWEEN(attr[i], 30, 37))
1245 term.c.attr.fg = attr[i] - 30;
1246 else if(BETWEEN(attr[i], 40, 47))
1247 term.c.attr.bg = attr[i] - 40;
1248 else if(BETWEEN(attr[i], 90, 97))
1249 term.c.attr.fg = attr[i] - 90 + 8;
1250 else if(BETWEEN(attr[i], 100, 107))
1251 term.c.attr.bg = attr[i] - 100 + 8;
1252 else
1253 fprintf(stderr, "erresc(default): gfx attr %d unknown\n", attr[i]), csidump();
1254 break;
1255 }
1256 }
1257 }
1258
1259 void
1260 tsetscroll(int t, int b) {
1261 int temp;
1262
1263 LIMIT(t, 0, term.row-1);
1264 LIMIT(b, 0, term.row-1);
1265 if(t > b) {
1266 temp = t;
1267 t = b;
1268 b = temp;
1269 }
1270 term.top = t;
1271 term.bot = b;
1272 }
1273
1274 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1275
1276 void
1277 tsetmode(bool priv, bool set, int *args, int narg) {
1278 int *lim, mode;
1279
1280 for(lim = args + narg; args < lim; ++args) {
1281 if(priv) {
1282 switch(*args) {
1283 break;
1284 case 1: /* DECCKM -- Cursor key */
1285 MODBIT(term.mode, set, MODE_APPKEYPAD);
1286 break;
1287 case 5: /* DECSCNM -- Reverve video */
1288 mode = term.mode;
1289 MODBIT(term.mode,set, MODE_REVERSE);
1290 if(mode != term.mode)
1291 redraw();
1292 break;
1293 case 6: /* XXX: DECOM -- Origin */
1294 break;
1295 case 7: /* DECAWM -- Auto wrap */
1296 MODBIT(term.mode, set, MODE_WRAP);
1297 break;
1298 case 8: /* XXX: DECARM -- Auto repeat */
1299 break;
1300 case 0: /* Error (IGNORED) */
1301 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1302 break;
1303 case 25:
1304 MODBIT(term.c.state, !set, CURSOR_HIDE);
1305 break;
1306 case 1000: /* 1000,1002: enable xterm mouse report */
1307 MODBIT(term.mode, set, MODE_MOUSEBTN);
1308 break;
1309 case 1002:
1310 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1311 break;
1312 case 1049: /* = 1047 and 1048 */
1313 case 47:
1314 case 1047:
1315 if(IS_SET(MODE_ALTSCREEN))
1316 tclearregion(0, 0, term.col-1, term.row-1);
1317 if((set && !IS_SET(MODE_ALTSCREEN)) ||
1318 (!set && IS_SET(MODE_ALTSCREEN))) {
1319 tswapscreen();
1320 }
1321 if(*args != 1049)
1322 break;
1323 /* pass through */
1324 case 1048:
1325 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1326 break;
1327 default:
1328 /* case 2: DECANM -- ANSI/VT52 (NOT SUPPOURTED) */
1329 /* case 3: DECCOLM -- Column (NOT SUPPORTED) */
1330 /* case 4: DECSCLM -- Scroll (NOT SUPPORTED) */
1331 /* case 18: DECPFF -- Printer feed (NOT SUPPORTED) */
1332 /* case 19: DECPEX -- Printer extent (NOT SUPPORTED) */
1333 /* case 42: DECNRCM -- National characters (NOT SUPPORTED) */
1334 fprintf(stderr,
1335 "erresc: unknown private set/reset mode %d\n",
1336 *args);
1337 break;
1338 }
1339 } else {
1340 switch(*args) {
1341 case 0: /* Error (IGNORED) */
1342 break;
1343 case 2: /* KAM -- keyboard action */
1344 MODBIT(term.mode, set, MODE_KBDLOCK);
1345 break;
1346 case 4: /* IRM -- Insertion-replacement */
1347 MODBIT(term.mode, set, MODE_INSERT);
1348 break;
1349 case 12: /* XXX: SRM -- Send/Receive */
1350 break;
1351 case 20: /* LNM -- Linefeed/new line */
1352 MODBIT(term.mode, set, MODE_CRLF);
1353 break;
1354 default:
1355 fprintf(stderr,
1356 "erresc: unknown set/reset mode %d\n",
1357 *args);
1358 break;
1359 }
1360 }
1361 }
1362 }
1363 #undef MODBIT
1364
1365
1366 void
1367 csihandle(void) {
1368 switch(csiescseq.mode) {
1369 default:
1370 unknown:
1371 fprintf(stderr, "erresc: unknown csi ");
1372 csidump();
1373 /* die(""); */
1374 break;
1375 case '@': /* ICH -- Insert <n> blank char */
1376 DEFAULT(csiescseq.arg[0], 1);
1377 tinsertblank(csiescseq.arg[0]);
1378 break;
1379 case 'A': /* CUU -- Cursor <n> Up */
1380 case 'e':
1381 DEFAULT(csiescseq.arg[0], 1);
1382 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1383 break;
1384 case 'B': /* CUD -- Cursor <n> Down */
1385 DEFAULT(csiescseq.arg[0], 1);
1386 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1387 break;
1388 case 'C': /* CUF -- Cursor <n> Forward */
1389 case 'a':
1390 DEFAULT(csiescseq.arg[0], 1);
1391 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1392 break;
1393 case 'D': /* CUB -- Cursor <n> Backward */
1394 DEFAULT(csiescseq.arg[0], 1);
1395 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1396 break;
1397 case 'E': /* CNL -- Cursor <n> Down and first col */
1398 DEFAULT(csiescseq.arg[0], 1);
1399 tmoveto(0, term.c.y+csiescseq.arg[0]);
1400 break;
1401 case 'F': /* CPL -- Cursor <n> Up and first col */
1402 DEFAULT(csiescseq.arg[0], 1);
1403 tmoveto(0, term.c.y-csiescseq.arg[0]);
1404 break;
1405 case 'g': /* TBC -- Tabulation clear */
1406 switch (csiescseq.arg[0]) {
1407 case 0: /* clear current tab stop */
1408 term.tabs[term.c.x] = 0;
1409 break;
1410 case 3: /* clear all the tabs */
1411 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1412 break;
1413 default:
1414 goto unknown;
1415 }
1416 break;
1417 case 'G': /* CHA -- Move to <col> */
1418 case '`': /* HPA */
1419 DEFAULT(csiescseq.arg[0], 1);
1420 tmoveto(csiescseq.arg[0]-1, term.c.y);
1421 break;
1422 case 'H': /* CUP -- Move to <row> <col> */
1423 case 'f': /* HVP */
1424 DEFAULT(csiescseq.arg[0], 1);
1425 DEFAULT(csiescseq.arg[1], 1);
1426 tmoveto(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1427 break;
1428 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1429 DEFAULT(csiescseq.arg[0], 1);
1430 while(csiescseq.arg[0]--)
1431 tputtab(1);
1432 break;
1433 case 'J': /* ED -- Clear screen */
1434 sel.bx = -1;
1435 switch(csiescseq.arg[0]) {
1436 case 0: /* below */
1437 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1438 if(term.c.y < term.row-1)
1439 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1440 break;
1441 case 1: /* above */
1442 if(term.c.y > 1)
1443 tclearregion(0, 0, term.col-1, term.c.y-1);
1444 tclearregion(0, term.c.y, term.c.x, term.c.y);
1445 break;
1446 case 2: /* all */
1447 tclearregion(0, 0, term.col-1, term.row-1);
1448 break;
1449 default:
1450 goto unknown;
1451 }
1452 break;
1453 case 'K': /* EL -- Clear line */
1454 switch(csiescseq.arg[0]) {
1455 case 0: /* right */
1456 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1457 break;
1458 case 1: /* left */
1459 tclearregion(0, term.c.y, term.c.x, term.c.y);
1460 break;
1461 case 2: /* all */
1462 tclearregion(0, term.c.y, term.col-1, term.c.y);
1463 break;
1464 }
1465 break;
1466 case 'S': /* SU -- Scroll <n> line up */
1467 DEFAULT(csiescseq.arg[0], 1);
1468 tscrollup(term.top, csiescseq.arg[0]);
1469 break;
1470 case 'T': /* SD -- Scroll <n> line down */
1471 DEFAULT(csiescseq.arg[0], 1);
1472 tscrolldown(term.top, csiescseq.arg[0]);
1473 break;
1474 case 'L': /* IL -- Insert <n> blank lines */
1475 DEFAULT(csiescseq.arg[0], 1);
1476 tinsertblankline(csiescseq.arg[0]);
1477 break;
1478 case 'l': /* RM -- Reset Mode */
1479 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1480 break;
1481 case 'M': /* DL -- Delete <n> lines */
1482 DEFAULT(csiescseq.arg[0], 1);
1483 tdeleteline(csiescseq.arg[0]);
1484 break;
1485 case 'X': /* ECH -- Erase <n> char */
1486 DEFAULT(csiescseq.arg[0], 1);
1487 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
1488 break;
1489 case 'P': /* DCH -- Delete <n> char */
1490 DEFAULT(csiescseq.arg[0], 1);
1491 tdeletechar(csiescseq.arg[0]);
1492 break;
1493 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1494 DEFAULT(csiescseq.arg[0], 1);
1495 while(csiescseq.arg[0]--)
1496 tputtab(0);
1497 break;
1498 case 'd': /* VPA -- Move to <row> */
1499 DEFAULT(csiescseq.arg[0], 1);
1500 tmoveto(term.c.x, csiescseq.arg[0]-1);
1501 break;
1502 case 'h': /* SM -- Set terminal mode */
1503 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1504 break;
1505 case 'm': /* SGR -- Terminal attribute (color) */
1506 tsetattr(csiescseq.arg, csiescseq.narg);
1507 break;
1508 case 'r': /* DECSTBM -- Set Scrolling Region */
1509 if(csiescseq.priv)
1510 goto unknown;
1511 else {
1512 DEFAULT(csiescseq.arg[0], 1);
1513 DEFAULT(csiescseq.arg[1], term.row);
1514 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1515 tmoveto(0, 0);
1516 }
1517 break;
1518 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1519 tcursor(CURSOR_SAVE);
1520 break;
1521 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1522 tcursor(CURSOR_LOAD);
1523 break;
1524 }
1525 }
1526
1527 void
1528 csidump(void) {
1529 int i;
1530 printf("ESC[");
1531 for(i = 0; i < csiescseq.len; i++) {
1532 uint c = csiescseq.buf[i] & 0xff;
1533 if(isprint(c)) putchar(c);
1534 else if(c == '\n') printf("(\\n)");
1535 else if(c == '\r') printf("(\\r)");
1536 else if(c == 0x1b) printf("(\\e)");
1537 else printf("(%02x)", c);
1538 }
1539 putchar('\n');
1540 }
1541
1542 void
1543 csireset(void) {
1544 memset(&csiescseq, 0, sizeof(csiescseq));
1545 }
1546
1547 void
1548 strhandle(void) {
1549 char *p;
1550
1551 /*
1552 * TODO: make this being useful in case of color palette change.
1553 */
1554 strparse();
1555
1556 p = strescseq.buf;
1557
1558 switch(strescseq.type) {
1559 case ']': /* OSC -- Operating System Command */
1560 switch(p[0]) {
1561 case '0':
1562 case '1':
1563 case '2':
1564 /*
1565 * TODO: Handle special chars in string, like umlauts.
1566 */
1567 if(p[1] == ';') {
1568 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1569 }
1570 break;
1571 case ';':
1572 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1573 break;
1574 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1575 break;
1576 default:
1577 fprintf(stderr, "erresc: unknown str ");
1578 strdump();
1579 break;
1580 }
1581 break;
1582 case 'k': /* old title set compatibility */
1583 XStoreName(xw.dpy, xw.win, strescseq.buf);
1584 break;
1585 case 'P': /* DSC -- Device Control String */
1586 case '_': /* APC -- Application Program Command */
1587 case '^': /* PM -- Privacy Message */
1588 default:
1589 fprintf(stderr, "erresc: unknown str ");
1590 strdump();
1591 /* die(""); */
1592 break;
1593 }
1594 }
1595
1596 void
1597 strparse(void) {
1598 /*
1599 * TODO: Implement parsing like for CSI when required.
1600 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1601 */
1602 return;
1603 }
1604
1605 void
1606 strdump(void) {
1607 int i;
1608 printf("ESC%c", strescseq.type);
1609 for(i = 0; i < strescseq.len; i++) {
1610 uint c = strescseq.buf[i] & 0xff;
1611 if(isprint(c)) putchar(c);
1612 else if(c == '\n') printf("(\\n)");
1613 else if(c == '\r') printf("(\\r)");
1614 else if(c == 0x1b) printf("(\\e)");
1615 else printf("(%02x)", c);
1616 }
1617 printf("ESC\\\n");
1618 }
1619
1620 void
1621 strreset(void) {
1622 memset(&strescseq, 0, sizeof(strescseq));
1623 }
1624
1625 void
1626 tputtab(bool forward) {
1627 uint x = term.c.x;
1628
1629 if(forward) {
1630 if(x == term.col)
1631 return;
1632 for(++x; x < term.col && !term.tabs[x]; ++x)
1633 /* nothing */ ;
1634 } else {
1635 if(x == 0)
1636 return;
1637 for(--x; x > 0 && !term.tabs[x]; --x)
1638 /* nothing */ ;
1639 }
1640 tmoveto(x, term.c.y);
1641 }
1642
1643 void
1644 tputc(char *c, int len) {
1645 char ascii = *c;
1646
1647 if(iofd != -1)
1648 write(iofd, c, len);
1649
1650 if(term.esc & ESC_START) {
1651 if(term.esc & ESC_CSI) {
1652 csiescseq.buf[csiescseq.len++] = ascii;
1653 if(BETWEEN(ascii, 0x40, 0x7E) || csiescseq.len >= ESC_BUF_SIZ) {
1654 term.esc = 0;
1655 csiparse(), csihandle();
1656 }
1657 } else if(term.esc & ESC_STR) {
1658 switch(ascii) {
1659 case '\033':
1660 term.esc = ESC_START | ESC_STR_END;
1661 break;
1662 case '\a': /* backwards compatibility to xterm */
1663 term.esc = 0;
1664 strhandle();
1665 break;
1666 default:
1667 strescseq.buf[strescseq.len++] = ascii;
1668 if(strescseq.len+1 >= STR_BUF_SIZ) {
1669 term.esc = 0;
1670 strhandle();
1671 }
1672 }
1673 } else if(term.esc & ESC_STR_END) {
1674 term.esc = 0;
1675 if(ascii == '\\')
1676 strhandle();
1677 } else if(term.esc & ESC_ALTCHARSET) {
1678 switch(ascii) {
1679 case '0': /* Line drawing crap */
1680 term.c.attr.mode |= ATTR_GFX;
1681 break;
1682 case 'B': /* Back to regular text */
1683 term.c.attr.mode &= ~ATTR_GFX;
1684 break;
1685 default:
1686 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1687 }
1688 term.esc = 0;
1689 } else {
1690 switch(ascii) {
1691 case '[':
1692 term.esc |= ESC_CSI;
1693 break;
1694 case 'P': /* DCS -- Device Control String */
1695 case '_': /* APC -- Application Program Command */
1696 case '^': /* PM -- Privacy Message */
1697 case ']': /* OSC -- Operating System Command */
1698 case 'k': /* old title set compatibility */
1699 strreset();
1700 strescseq.type = ascii;
1701 term.esc |= ESC_STR;
1702 break;
1703 case ')':
1704 case '(':
1705 term.esc |= ESC_ALTCHARSET;
1706 break;
1707 case 'D': /* IND -- Linefeed */
1708 if(term.c.y == term.bot)
1709 tscrollup(term.top, 1);
1710 else
1711 tmoveto(term.c.x, term.c.y+1);
1712 term.esc = 0;
1713 break;
1714 case 'E': /* NEL -- Next line */
1715 tnewline(1); /* always go to first col */
1716 term.esc = 0;
1717 break;
1718 case 'H': /* HTS -- Horizontal tab stop */
1719 term.tabs[term.c.x] = 1;
1720 term.esc = 0;
1721 break;
1722 case 'M': /* RI -- Reverse index */
1723 if(term.c.y == term.top)
1724 tscrolldown(term.top, 1);
1725 else
1726 tmoveto(term.c.x, term.c.y-1);
1727 term.esc = 0;
1728 break;
1729 case 'c': /* RIS -- Reset to inital state */
1730 treset();
1731 term.esc = 0;
1732 xclear(0, 0, xw.w, xw.h);
1733 xresettitle();
1734 break;
1735 case '=': /* DECPAM -- Application keypad */
1736 term.mode |= MODE_APPKEYPAD;
1737 term.esc = 0;
1738 break;
1739 case '>': /* DECPNM -- Normal keypad */
1740 term.mode &= ~MODE_APPKEYPAD;
1741 term.esc = 0;
1742 break;
1743 case '7': /* DECSC -- Save Cursor */
1744 tcursor(CURSOR_SAVE);
1745 term.esc = 0;
1746 break;
1747 case '8': /* DECRC -- Restore Cursor */
1748 tcursor(CURSOR_LOAD);
1749 term.esc = 0;
1750 break;
1751 case '\\': /* ST -- Stop */
1752 term.esc = 0;
1753 break;
1754 default:
1755 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
1756 (uchar) ascii, isprint(ascii)?ascii:'.');
1757 term.esc = 0;
1758 }
1759 }
1760 } else {
1761 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
1762 sel.bx = -1;
1763 switch(ascii) {
1764 case '\0': /* padding character, do nothing */
1765 break;
1766 case '\t':
1767 tputtab(1);
1768 break;
1769 case '\b':
1770 tmoveto(term.c.x-1, term.c.y);
1771 break;
1772 case '\r':
1773 tmoveto(0, term.c.y);
1774 break;
1775 case '\f':
1776 case '\v':
1777 case '\n':
1778 /* go to first col if the mode is set */
1779 tnewline(IS_SET(MODE_CRLF));
1780 break;
1781 case '\a':
1782 if(!(xw.state & WIN_FOCUSED))
1783 xseturgency(1);
1784 break;
1785 case '\033':
1786 csireset();
1787 term.esc = ESC_START;
1788 break;
1789 default:
1790 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1791 tnewline(1); /* always go to first col */
1792 tsetchar(c);
1793 if(term.c.x+1 < term.col)
1794 tmoveto(term.c.x+1, term.c.y);
1795 else
1796 term.c.state |= CURSOR_WRAPNEXT;
1797 }
1798 }
1799 }
1800
1801 int
1802 tresize(int col, int row) {
1803 int i, x;
1804 int minrow = MIN(row, term.row);
1805 int mincol = MIN(col, term.col);
1806 int slide = term.c.y - row + 1;
1807
1808 if(col < 1 || row < 1)
1809 return 0;
1810
1811 /* free unneeded rows */
1812 i = 0;
1813 if(slide > 0) {
1814 /* slide screen to keep cursor where we expect it -
1815 * tscrollup would work here, but we can optimize to
1816 * memmove because we're freeing the earlier lines */
1817 for(/* i = 0 */; i < slide; i++) {
1818 free(term.line[i]);
1819 free(term.alt[i]);
1820 }
1821 memmove(term.line, term.line + slide, row * sizeof(Line));
1822 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1823 }
1824 for(i += row; i < term.row; i++) {
1825 free(term.line[i]);
1826 free(term.alt[i]);
1827 }
1828
1829 /* resize to new height */
1830 term.line = xrealloc(term.line, row * sizeof(Line));
1831 term.alt = xrealloc(term.alt, row * sizeof(Line));
1832 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
1833 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
1834
1835 /* resize each row to new width, zero-pad if needed */
1836 for(i = 0; i < minrow; i++) {
1837 term.dirty[i] = 1;
1838 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
1839 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
1840 for(x = mincol; x < col; x++) {
1841 term.line[i][x].state = 0;
1842 term.alt[i][x].state = 0;
1843 }
1844 }
1845
1846 /* allocate any new rows */
1847 for(/* i == minrow */; i < row; i++) {
1848 term.dirty[i] = 1;
1849 term.line[i] = xcalloc(col, sizeof(Glyph));
1850 term.alt [i] = xcalloc(col, sizeof(Glyph));
1851 }
1852 if(col > term.col) {
1853 bool *bp = term.tabs + term.col;
1854
1855 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
1856 while(--bp > term.tabs && !*bp)
1857 /* nothing */ ;
1858 for(bp += TAB; bp < term.tabs + col; bp += TAB)
1859 *bp = 1;
1860 }
1861 /* update terminal size */
1862 term.col = col, term.row = row;
1863 /* make use of the LIMIT in tmoveto */
1864 tmoveto(term.c.x, term.c.y);
1865 /* reset scrolling region */
1866 tsetscroll(0, row-1);
1867
1868 return (slide > 0);
1869 }
1870
1871 void
1872 xresize(int col, int row) {
1873 xw.tw = MAX(1, 2*BORDER + col * xw.cw);
1874 xw.th = MAX(1, 2*BORDER + row * xw.ch);
1875
1876 XftDrawChange(xw.xft_draw, xw.buf);
1877 }
1878
1879 void
1880 xloadcols(void) {
1881 int i, r, g, b;
1882 XRenderColor xft_color = { .alpha = 0 };
1883 ulong white = WhitePixel(xw.dpy, xw.scr);
1884
1885 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
1886 for(i = 0; i < LEN(colorname); i++) {
1887 if(!colorname[i])
1888 continue;
1889 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.xft_col[i])) {
1890 dc.col[i] = white;
1891 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1892 } else
1893 dc.col[i] = dc.xft_col[i].pixel;
1894 }
1895
1896 /* load colors [16-255] ; same colors as xterm */
1897 for(i = 16, r = 0; r < 6; r++)
1898 for(g = 0; g < 6; g++)
1899 for(b = 0; b < 6; b++) {
1900 xft_color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1901 xft_color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1902 xft_color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1903 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &xft_color, &dc.xft_col[i])) {
1904 dc.col[i] = white;
1905 fprintf(stderr, "Could not allocate color %d\n", i);
1906 } else
1907 dc.col[i] = dc.xft_col[i].pixel;
1908 i++;
1909 }
1910
1911 for(r = 0; r < 24; r++, i++) {
1912 xft_color.red = xft_color.green = xft_color.blue = 0x0808 + 0x0a0a * r;
1913 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &xft_color, &dc.xft_col[i])) {
1914 dc.col[i] = white;
1915 fprintf(stderr, "Could not allocate color %d\n", i);
1916 } else
1917 dc.col[i] = dc.xft_col[i].pixel;
1918 }
1919 }
1920
1921 void
1922 xclear(int x1, int y1, int x2, int y2) {
1923 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
1924 XFillRectangle(xw.dpy, xw.buf, dc.gc,
1925 BORDER + x1 * xw.cw, BORDER + y1 * xw.ch,
1926 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1927 }
1928
1929 void
1930 xhints(void) {
1931 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
1932 XWMHints wm = {.flags = InputHint, .input = 1};
1933 XSizeHints *sizeh = NULL;
1934
1935 sizeh = XAllocSizeHints();
1936 if(xw.isfixed == False) {
1937 sizeh->flags = PSize | PResizeInc | PBaseSize;
1938 sizeh->height = xw.h;
1939 sizeh->width = xw.w;
1940 sizeh->height_inc = xw.ch;
1941 sizeh->width_inc = xw.cw;
1942 sizeh->base_height = 2*BORDER;
1943 sizeh->base_width = 2*BORDER;
1944 } else {
1945 sizeh->flags = PMaxSize | PMinSize;
1946 sizeh->min_width = sizeh->max_width = xw.fw;
1947 sizeh->min_height = sizeh->max_height = xw.fh;
1948 }
1949
1950 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
1951 XFree(sizeh);
1952 }
1953
1954 void
1955 xinitfont(Font *f, char *fontstr) {
1956 f->xft_set = XftFontOpenName(xw.dpy, xw.scr, fontstr);
1957
1958 if(!f->xft_set)
1959 die("st: can't open font %s.\n", fontstr);
1960
1961 f->ascent = f->xft_set->ascent;
1962 f->descent = f->xft_set->descent;
1963 f->lbearing = 0;
1964 f->rbearing = f->xft_set->max_advance_width;
1965 }
1966
1967 void
1968 initfonts(char *fontstr, char *bfontstr, char *ifontstr, char *ibfontstr) {
1969 xinitfont(&dc.font, fontstr);
1970 xinitfont(&dc.bfont, bfontstr);
1971 xinitfont(&dc.ifont, ifontstr);
1972 xinitfont(&dc.ibfont, ibfontstr);
1973 }
1974
1975 void
1976 xinit(void) {
1977 XSetWindowAttributes attrs;
1978 Cursor cursor;
1979 Window parent;
1980 int sw, sh, major, minor;
1981
1982 if(!(xw.dpy = XOpenDisplay(NULL)))
1983 die("Can't open display\n");
1984 xw.scr = XDefaultScreen(xw.dpy);
1985 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
1986
1987 /* font */
1988 initfonts(FONT, BOLDFONT, ITALICFONT, ITALICBOLDFONT);
1989
1990 /* XXX: Assuming same size for bold font */
1991 xw.cw = dc.font.rbearing - dc.font.lbearing;
1992 xw.ch = dc.font.ascent + dc.font.descent;
1993
1994 /* colors */
1995 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1996 xloadcols();
1997
1998 /* adjust fixed window geometry */
1999 if(xw.isfixed) {
2000 sw = DisplayWidth(xw.dpy, xw.scr);
2001 sh = DisplayHeight(xw.dpy, xw.scr);
2002 if(xw.fx < 0)
2003 xw.fx = sw + xw.fx - xw.fw - 1;
2004 if(xw.fy < 0)
2005 xw.fy = sh + xw.fy - xw.fh - 1;
2006
2007 xw.h = xw.fh;
2008 xw.w = xw.fw;
2009 } else {
2010 /* window - default size */
2011 xw.h = 2*BORDER + term.row * xw.ch;
2012 xw.w = 2*BORDER + term.col * xw.cw;
2013 xw.fx = 0;
2014 xw.fy = 0;
2015 }
2016
2017 attrs.background_pixel = dc.col[DefaultBG];
2018 attrs.border_pixel = dc.col[DefaultBG];
2019 attrs.bit_gravity = NorthWestGravity;
2020 attrs.event_mask = FocusChangeMask | KeyPressMask
2021 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2022 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2023 attrs.colormap = xw.cmap;
2024
2025 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
2026 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2027 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2028 xw.vis,
2029 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2030 | CWColormap,
2031 &attrs);
2032
2033 /* double buffering */
2034 if(!XdbeQueryExtension(xw.dpy, &major, &minor))
2035 die("Xdbe extension is not present\n");
2036 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
2037
2038 /* Xft rendering context */
2039 xw.xft_draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2040
2041 /* input methods */
2042 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
2043 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2044 | XIMStatusNothing, XNClientWindow, xw.win,
2045 XNFocusWindow, xw.win, NULL);
2046 /* gc */
2047 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
2048
2049 /* white cursor, black outline */
2050 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2051 XDefineCursor(xw.dpy, xw.win, cursor);
2052 XRecolorCursor(xw.dpy, cursor,
2053 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2054 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2055
2056 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2057
2058 xresettitle();
2059 XMapWindow(xw.dpy, xw.win);
2060 xhints();
2061 XSync(xw.dpy, 0);
2062 }
2063
2064 void
2065 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2066 int fg = base.fg, bg = base.bg, temp;
2067 int winx = BORDER+x*xw.cw, winy = BORDER+y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
2068 Font *font = &dc.font;
2069 XGlyphInfo extents;
2070 int i;
2071
2072 /* only switch default fg/bg if term is in RV mode */
2073 if(IS_SET(MODE_REVERSE)) {
2074 if(fg == DefaultFG)
2075 fg = DefaultBG;
2076 if(bg == DefaultBG)
2077 bg = DefaultFG;
2078 }
2079
2080 if(base.mode & ATTR_REVERSE)
2081 temp = fg, fg = bg, bg = temp;
2082
2083 if(base.mode & ATTR_BOLD) {
2084 fg += 8;
2085 font = &dc.bfont;
2086 }
2087
2088 if(base.mode & ATTR_ITALIC)
2089 font = &dc.ifont;
2090 if(base.mode & (ATTR_ITALIC|ATTR_ITALIC))
2091 font = &dc.ibfont;
2092
2093 XSetBackground(xw.dpy, dc.gc, dc.col[bg]);
2094 XSetForeground(xw.dpy, dc.gc, dc.col[fg]);
2095
2096 if(base.mode & ATTR_GFX) {
2097 for(i = 0; i < bytelen; i++) {
2098 char c = gfx[(uint)s[i] % 256];
2099 if(c)
2100 s[i] = c;
2101 else if(s[i] > 0x5f)
2102 s[i] -= 0x5f;
2103 }
2104 }
2105
2106 XftTextExtentsUtf8(xw.dpy, font->xft_set, (FcChar8 *)s, bytelen, &extents);
2107 width = extents.xOff;
2108 XftDrawRect(xw.xft_draw, &dc.xft_col[bg], winx, winy - font->ascent, width, xw.ch);
2109 XftDrawStringUtf8(xw.xft_draw, &dc.xft_col[fg], font->xft_set, winx, winy, (FcChar8 *)s, bytelen);
2110
2111 if(base.mode & ATTR_UNDERLINE)
2112 XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
2113 }
2114
2115 void
2116 xdrawcursor(void) {
2117 static int oldx = 0;
2118 static int oldy = 0;
2119 int sl;
2120 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
2121
2122 LIMIT(oldx, 0, term.col-1);
2123 LIMIT(oldy, 0, term.row-1);
2124
2125 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2126 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2127
2128 /* remove the old cursor */
2129 if(term.line[oldy][oldx].state & GLYPH_SET) {
2130 sl = utf8size(term.line[oldy][oldx].c);
2131 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
2132 } else
2133 xclear(oldx, oldy, oldx, oldy);
2134
2135 /* draw the new one */
2136 if(!(term.c.state & CURSOR_HIDE)) {
2137 if(!(xw.state & WIN_FOCUSED))
2138 g.bg = DefaultUCS;
2139
2140 if(IS_SET(MODE_REVERSE))
2141 g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
2142
2143 sl = utf8size(g.c);
2144 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2145 oldx = term.c.x, oldy = term.c.y;
2146 }
2147 }
2148
2149 void
2150 xresettitle(void) {
2151 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
2152 }
2153
2154 void
2155 redraw(void) {
2156 struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
2157
2158 xclear(0, 0, xw.w, xw.h);
2159 tfulldirt();
2160 draw();
2161 XSync(xw.dpy, False); /* necessary for a good tput flash */
2162 nanosleep(&tv, NULL);
2163 }
2164
2165 void
2166 draw() {
2167 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2168
2169 drawregion(0, 0, term.col, term.row);
2170 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2171 }
2172
2173 void
2174 drawregion(int x1, int y1, int x2, int y2) {
2175 int ic, ib, x, y, ox, sl;
2176 Glyph base, new;
2177 char buf[DRAW_BUF_SIZ];
2178 bool ena_sel = sel.bx != -1, alt = IS_SET(MODE_ALTSCREEN);
2179
2180 if((sel.alt && !alt) || (!sel.alt && alt))
2181 ena_sel = 0;
2182 if(!(xw.state & WIN_VISIBLE))
2183 return;
2184
2185 for(y = y1; y < y2; y++) {
2186 if(!term.dirty[y])
2187 continue;
2188 xclear(0, y, term.col, y);
2189 term.dirty[y] = 0;
2190 base = term.line[y][0];
2191 ic = ib = ox = 0;
2192 for(x = x1; x < x2; x++) {
2193 new = term.line[y][x];
2194 if(ena_sel && *(new.c) && selected(x, y))
2195 new.mode ^= ATTR_REVERSE;
2196 if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
2197 ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2198 xdraws(buf, base, ox, y, ic, ib);
2199 ic = ib = 0;
2200 }
2201 if(new.state & GLYPH_SET) {
2202 if(ib == 0) {
2203 ox = x;
2204 base = new;
2205 }
2206 sl = utf8size(new.c);
2207 memcpy(buf+ib, new.c, sl);
2208 ib += sl;
2209 ++ic;
2210 }
2211 }
2212 if(ib > 0)
2213 xdraws(buf, base, ox, y, ic, ib);
2214 }
2215 xdrawcursor();
2216 }
2217
2218 void
2219 expose(XEvent *ev) {
2220 XExposeEvent *e = &ev->xexpose;
2221 if(xw.state & WIN_REDRAW) {
2222 if(!e->count)
2223 xw.state &= ~WIN_REDRAW;
2224 }
2225 }
2226
2227 void
2228 visibility(XEvent *ev) {
2229 XVisibilityEvent *e = &ev->xvisibility;
2230 if(e->state == VisibilityFullyObscured)
2231 xw.state &= ~WIN_VISIBLE;
2232 else if(!(xw.state & WIN_VISIBLE))
2233 /* need a full redraw for next Expose, not just a buf copy */
2234 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2235 }
2236
2237 void
2238 unmap(XEvent *ev) {
2239 xw.state &= ~WIN_VISIBLE;
2240 }
2241
2242 void
2243 xseturgency(int add) {
2244 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2245 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2246 XSetWMHints(xw.dpy, xw.win, h);
2247 XFree(h);
2248 }
2249
2250 void
2251 focus(XEvent *ev) {
2252 if(ev->type == FocusIn) {
2253 xw.state |= WIN_FOCUSED;
2254 xseturgency(0);
2255 } else
2256 xw.state &= ~WIN_FOCUSED;
2257 }
2258
2259 char*
2260 kmap(KeySym k, uint state) {
2261 int i;
2262 state &= ~Mod2Mask;
2263 for(i = 0; i < LEN(key); i++) {
2264 uint mask = key[i].mask;
2265 if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
2266 return (char*)key[i].s;
2267 }
2268 return NULL;
2269 }
2270
2271 void
2272 kpress(XEvent *ev) {
2273 XKeyEvent *e = &ev->xkey;
2274 KeySym ksym;
2275 char buf[32];
2276 char *customkey;
2277 int len;
2278 int meta;
2279 int shift;
2280 Status status;
2281
2282 if (IS_SET(MODE_KBDLOCK))
2283 return;
2284 meta = e->state & Mod1Mask;
2285 shift = e->state & ShiftMask;
2286 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
2287
2288 /* 1. custom keys from config.h */
2289 if((customkey = kmap(ksym, e->state)))
2290 ttywrite(customkey, strlen(customkey));
2291 /* 2. hardcoded (overrides X lookup) */
2292 else
2293 switch(ksym) {
2294 case XK_Up:
2295 case XK_Down:
2296 case XK_Left:
2297 case XK_Right:
2298 /* XXX: shift up/down doesn't work */
2299 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
2300 ttywrite(buf, 3);
2301 break;
2302 case XK_Insert:
2303 if(shift)
2304 selpaste();
2305 break;
2306 case XK_Return:
2307 if(IS_SET(MODE_CRLF))
2308 ttywrite("\r\n", 2);
2309 else
2310 ttywrite("\r", 1);
2311 break;
2312 /* 3. X lookup */
2313 default:
2314 if(len > 0) {
2315 if(meta && len == 1)
2316 ttywrite("\033", 1);
2317 ttywrite(buf, len);
2318 }
2319 break;
2320 }
2321 }
2322
2323 void
2324 cmessage(XEvent *e) {
2325 /* See xembed specs
2326 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2327 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2328 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2329 xw.state |= WIN_FOCUSED;
2330 xseturgency(0);
2331 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2332 xw.state &= ~WIN_FOCUSED;
2333 }
2334 }
2335 }
2336
2337 void
2338 resize(XEvent *e) {
2339 int col, row;
2340
2341 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2342 return;
2343
2344 xw.w = e->xconfigure.width;
2345 xw.h = e->xconfigure.height;
2346 col = (xw.w - 2*BORDER) / xw.cw;
2347 row = (xw.h - 2*BORDER) / xw.ch;
2348 if(col == term.col && row == term.row)
2349 return;
2350
2351 xclear(0, 0, xw.w, xw.h);
2352 tresize(col, row);
2353 xresize(col, row);
2354 ttyresize();
2355 }
2356
2357 void
2358 run(void) {
2359 XEvent ev;
2360 fd_set rfd;
2361 int xfd = XConnectionNumber(xw.dpy), i;
2362 struct timeval drawtimeout, *tv = NULL;
2363
2364 for(i = 0;; i++) {
2365 FD_ZERO(&rfd);
2366 FD_SET(cmdfd, &rfd);
2367 FD_SET(xfd, &rfd);
2368 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
2369 if(errno == EINTR)
2370 continue;
2371 die("select failed: %s\n", SERRNO);
2372 }
2373
2374 /*
2375 * Stop after a certain number of reads so the user does not
2376 * feel like the system is stuttering.
2377 */
2378 if(i < 1000 && FD_ISSET(cmdfd, &rfd)) {
2379 ttyread();
2380
2381 /*
2382 * Just wait a bit so it isn't disturbing the
2383 * user and the system is able to write something.
2384 */
2385 drawtimeout.tv_sec = 0;
2386 drawtimeout.tv_usec = 5;
2387 tv = &drawtimeout;
2388 continue;
2389 }
2390 i = 0;
2391 tv = NULL;
2392
2393 while(XPending(xw.dpy)) {
2394 XNextEvent(xw.dpy, &ev);
2395 if(XFilterEvent(&ev, xw.win))
2396 continue;
2397 if(handler[ev.type])
2398 (handler[ev.type])(&ev);
2399 }
2400
2401 draw();
2402 XFlush(xw.dpy);
2403 }
2404 }
2405
2406 int
2407 main(int argc, char *argv[]) {
2408 int i, bitm, xr, yr;
2409 uint wr, hr;
2410
2411 xw.fw = xw.fh = xw.fx = xw.fy = 0;
2412 xw.isfixed = False;
2413
2414 for(i = 1; i < argc; i++) {
2415 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2416 case 't':
2417 if(++i < argc) opt_title = argv[i];
2418 break;
2419 case 'c':
2420 if(++i < argc) opt_class = argv[i];
2421 break;
2422 case 'w':
2423 if(++i < argc) opt_embed = argv[i];
2424 break;
2425 case 'f':
2426 if(++i < argc) opt_io = argv[i];
2427 break;
2428 case 'e':
2429 /* eat every remaining arguments */
2430 if(++i < argc) opt_cmd = &argv[i];
2431 goto run;
2432 case 'g':
2433 if(++i >= argc)
2434 break;
2435
2436 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
2437 if(bitm & XValue)
2438 xw.fx = xr;
2439 if(bitm & YValue)
2440 xw.fy = yr;
2441 if(bitm & WidthValue)
2442 xw.fw = (int)wr;
2443 if(bitm & HeightValue)
2444 xw.fh = (int)hr;
2445 if(bitm & XNegative && xw.fx == 0)
2446 xw.fx = -1;
2447 if(bitm & XNegative && xw.fy == 0)
2448 xw.fy = -1;
2449
2450 if(xw.fh != 0 && xw.fw != 0)
2451 xw.isfixed = True;
2452 break;
2453 case 'v':
2454 default:
2455 die(USAGE);
2456 }
2457 }
2458
2459 run:
2460 setlocale(LC_CTYPE, "");
2461 tnew(80, 24);
2462 ttynew();
2463 xinit();
2464 selinit();
2465 run();
2466 return 0;
2467 }
2468