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83edbb8a27d3c1e660fde797fc883274e8b5fd14
[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 };
115
116 enum escape_state {
117 ESC_START = 1,
118 ESC_CSI = 2,
119 ESC_STR = 4, /* DSC, OSC, PM, APC */
120 ESC_ALTCHARSET = 8,
121 ESC_STR_END = 16, /* a final string was encountered */
122 };
123
124 enum window_state {
125 WIN_VISIBLE = 1,
126 WIN_REDRAW = 2,
127 WIN_FOCUSED = 4
128 };
129
130 /* bit macro */
131 #undef B0
132 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
133
134 typedef unsigned char uchar;
135 typedef unsigned int uint;
136 typedef unsigned long ulong;
137 typedef unsigned short ushort;
138
139 typedef struct {
140 char c[UTF_SIZ]; /* character code */
141 uchar mode; /* attribute flags */
142 ushort fg; /* foreground */
143 ushort bg; /* background */
144 uchar state; /* state flags */
145 } Glyph;
146
147 typedef Glyph* Line;
148
149 typedef struct {
150 Glyph attr; /* current char attributes */
151 int x;
152 int y;
153 char state;
154 } TCursor;
155
156 /* CSI Escape sequence structs */
157 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
158 typedef struct {
159 char buf[ESC_BUF_SIZ]; /* raw string */
160 int len; /* raw string length */
161 char priv;
162 int arg[ESC_ARG_SIZ];
163 int narg; /* nb of args */
164 char mode;
165 } CSIEscape;
166
167 /* STR Escape sequence structs */
168 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
169 typedef struct {
170 char type; /* ESC type ... */
171 char buf[STR_BUF_SIZ]; /* raw string */
172 int len; /* raw string length */
173 char *args[STR_ARG_SIZ];
174 int narg; /* nb of args */
175 } STREscape;
176
177 /* Internal representation of the screen */
178 typedef struct {
179 int row; /* nb row */
180 int col; /* nb col */
181 Line* line; /* screen */
182 Line* alt; /* alternate screen */
183 bool* dirty; /* dirtyness of lines */
184 TCursor c; /* cursor */
185 int top; /* top scroll limit */
186 int bot; /* bottom scroll limit */
187 int mode; /* terminal mode flags */
188 int esc; /* escape state flags */
189 bool *tabs;
190 } Term;
191
192 /* Purely graphic info */
193 typedef struct {
194 Display* dpy;
195 Colormap cmap;
196 Window win;
197 XdbeBackBuffer buf;
198 Atom xembed;
199 XIM xim;
200 XIC xic;
201 XftDraw *xft_draw;
202 Visual *vis;
203 int scr;
204 bool isfixed; /* is fixed geometry? */
205 int fx, fy, fw, fh; /* fixed geometry */
206 int tw, th; /* tty width and height */
207 int w; /* window width */
208 int h; /* window height */
209 int ch; /* char height */
210 int cw; /* char width */
211 char state; /* focus, redraw, visible */
212 } XWindow;
213
214 typedef struct {
215 KeySym k;
216 uint mask;
217 char s[ESC_BUF_SIZ];
218 } Key;
219
220 /* TODO: use better name for vars... */
221 typedef struct {
222 int mode;
223 int bx, by;
224 int ex, ey;
225 struct {int x, y;} b, e;
226 char *clip;
227 Atom xtarget;
228 bool alt;
229 struct timeval tclick1;
230 struct timeval tclick2;
231 } Selection;
232
233 #include "config.h"
234
235 /* Font structure */
236 typedef struct {
237 int ascent;
238 int descent;
239 short lbearing;
240 short rbearing;
241 XFontSet set;
242 XftFont* xft_set;
243 } Font;
244
245 /* Drawing Context */
246 typedef struct {
247 ulong col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
248 XftColor xft_col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
249 GC gc;
250 Font font, bfont, ifont, ibfont;
251 } DC;
252
253 static void die(const char*, ...);
254 static void draw(void);
255 static void redraw(void);
256 static void drawregion(int, int, int, int);
257 static void execsh(void);
258 static void sigchld(int);
259 static void run(void);
260
261 static void csidump(void);
262 static void csihandle(void);
263 static void csiparse(void);
264 static void csireset(void);
265 static void strdump(void);
266 static void strhandle(void);
267 static void strparse(void);
268 static void strreset(void);
269
270 static void tclearregion(int, int, int, int);
271 static void tcursor(int);
272 static void tdeletechar(int);
273 static void tdeleteline(int);
274 static void tinsertblank(int);
275 static void tinsertblankline(int);
276 static void tmoveto(int, int);
277 static void tnew(int, int);
278 static void tnewline(int);
279 static void tputtab(bool);
280 static void tputc(char*);
281 static void treset(void);
282 static int tresize(int, int);
283 static void tscrollup(int, int);
284 static void tscrolldown(int, int);
285 static void tsetattr(int*, int);
286 static void tsetchar(char*);
287 static void tsetscroll(int, int);
288 static void tswapscreen(void);
289 static void tsetdirt(int, int);
290 static void tsetmode(bool, bool, int *, int);
291 static void tfulldirt(void);
292
293 static void ttynew(void);
294 static void ttyread(void);
295 static void ttyresize(void);
296 static void ttywrite(const char *, size_t);
297
298 static void xdraws(char *, Glyph, int, int, int, int);
299 static void xhints(void);
300 static void xclear(int, int, int, int);
301 static void xdrawcursor(void);
302 static void xinit(void);
303 static void xloadcols(void);
304 static void xresettitle(void);
305 static void xseturgency(int);
306 static void xsetsel(char*);
307 static void xresize(int, int);
308
309 static void expose(XEvent *);
310 static void visibility(XEvent *);
311 static void unmap(XEvent *);
312 static char* kmap(KeySym, uint);
313 static void kpress(XEvent *);
314 static void cmessage(XEvent *);
315 static void resize(XEvent *);
316 static void focus(XEvent *);
317 static void brelease(XEvent *);
318 static void bpress(XEvent *);
319 static void bmotion(XEvent *);
320 static void selnotify(XEvent *);
321 static void selclear(XEvent *);
322 static void selrequest(XEvent *);
323
324 static void selinit(void);
325 static inline bool selected(int, int);
326 static void selcopy(void);
327 static void selpaste(void);
328 static void selscroll(int, int);
329
330 static int utf8decode(char *, long *);
331 static int utf8encode(long *, char *);
332 static int utf8size(char *);
333 static int isfullutf8(char *, int);
334
335 static void *xmalloc(size_t);
336 static void *xrealloc(void *, size_t);
337 static void *xcalloc(size_t nmemb, size_t size);
338
339 static void (*handler[LASTEvent])(XEvent *) = {
340 [KeyPress] = kpress,
341 [ClientMessage] = cmessage,
342 [ConfigureNotify] = resize,
343 [VisibilityNotify] = visibility,
344 [UnmapNotify] = unmap,
345 [Expose] = expose,
346 [FocusIn] = focus,
347 [FocusOut] = focus,
348 [MotionNotify] = bmotion,
349 [ButtonPress] = bpress,
350 [ButtonRelease] = brelease,
351 [SelectionClear] = selclear,
352 [SelectionNotify] = selnotify,
353 [SelectionRequest] = selrequest,
354 };
355
356 /* Globals */
357 static DC dc;
358 static XWindow xw;
359 static Term term;
360 static CSIEscape csiescseq;
361 static STREscape strescseq;
362 static int cmdfd;
363 static pid_t pid;
364 static Selection sel;
365 static int iofd = -1;
366 static char **opt_cmd = NULL;
367 static char *opt_io = NULL;
368 static char *opt_title = NULL;
369 static char *opt_embed = NULL;
370 static char *opt_class = NULL;
371
372 void *
373 xmalloc(size_t len) {
374 void *p = malloc(len);
375 if(!p)
376 die("Out of memory\n");
377 return p;
378 }
379
380 void *
381 xrealloc(void *p, size_t len) {
382 if((p = realloc(p, len)) == NULL)
383 die("Out of memory\n");
384 return p;
385 }
386
387 void *
388 xcalloc(size_t nmemb, size_t size) {
389 void *p = calloc(nmemb, size);
390 if(!p)
391 die("Out of memory\n");
392 return p;
393 }
394
395 int
396 utf8decode(char *s, long *u) {
397 uchar c;
398 int i, n, rtn;
399
400 rtn = 1;
401 c = *s;
402 if(~c & B7) { /* 0xxxxxxx */
403 *u = c;
404 return rtn;
405 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
406 *u = c&(B4|B3|B2|B1|B0);
407 n = 1;
408 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
409 *u = c&(B3|B2|B1|B0);
410 n = 2;
411 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
412 *u = c & (B2|B1|B0);
413 n = 3;
414 } else
415 goto invalid;
416 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
417 c = *s;
418 if((c & (B7|B6)) != B7) /* 10xxxxxx */
419 goto invalid;
420 *u <<= 6;
421 *u |= c & (B5|B4|B3|B2|B1|B0);
422 }
423 if((n == 1 && *u < 0x80) ||
424 (n == 2 && *u < 0x800) ||
425 (n == 3 && *u < 0x10000) ||
426 (*u >= 0xD800 && *u <= 0xDFFF))
427 goto invalid;
428 return rtn;
429 invalid:
430 *u = 0xFFFD;
431 return rtn;
432 }
433
434 int
435 utf8encode(long *u, char *s) {
436 uchar *sp;
437 ulong uc;
438 int i, n;
439
440 sp = (uchar*) s;
441 uc = *u;
442 if(uc < 0x80) {
443 *sp = uc; /* 0xxxxxxx */
444 return 1;
445 } else if(*u < 0x800) {
446 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
447 n = 1;
448 } else if(uc < 0x10000) {
449 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
450 n = 2;
451 } else if(uc <= 0x10FFFF) {
452 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
453 n = 3;
454 } else {
455 goto invalid;
456 }
457 for(i=n,++sp; i>0; --i,++sp)
458 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
459 return n+1;
460 invalid:
461 /* U+FFFD */
462 *s++ = '\xEF';
463 *s++ = '\xBF';
464 *s = '\xBD';
465 return 3;
466 }
467
468 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
469 UTF-8 otherwise return 0 */
470 int
471 isfullutf8(char *s, int b) {
472 uchar *c1, *c2, *c3;
473
474 c1 = (uchar *) s;
475 c2 = (uchar *) ++s;
476 c3 = (uchar *) ++s;
477 if(b < 1)
478 return 0;
479 else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
480 return 0;
481 else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
482 ((b == 1) ||
483 ((b == 2) && (*c2&(B7|B6)) == B7)))
484 return 0;
485 else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
486 ((b == 1) ||
487 ((b == 2) && (*c2&(B7|B6)) == B7) ||
488 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7)))
489 return 0;
490 else
491 return 1;
492 }
493
494 int
495 utf8size(char *s) {
496 uchar c = *s;
497
498 if(~c&B7)
499 return 1;
500 else if((c&(B7|B6|B5)) == (B7|B6))
501 return 2;
502 else if((c&(B7|B6|B5|B4)) == (B7|B6|B5))
503 return 3;
504 else
505 return 4;
506 }
507
508 void
509 selinit(void) {
510 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
511 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
512 sel.mode = 0;
513 sel.bx = -1;
514 sel.clip = NULL;
515 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
516 if(sel.xtarget == None)
517 sel.xtarget = XA_STRING;
518 }
519
520 static inline bool
521 selected(int x, int y) {
522 if(sel.ey == y && sel.by == y) {
523 int bx = MIN(sel.bx, sel.ex);
524 int ex = MAX(sel.bx, sel.ex);
525 return BETWEEN(x, bx, ex);
526 }
527 return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
528 || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
529 }
530
531 void
532 getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
533 if(b)
534 *b = e->xbutton.button;
535
536 *x = X2COL(e->xbutton.x);
537 *y = Y2ROW(e->xbutton.y);
538 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
539 sel.b.y = MIN(sel.by, sel.ey);
540 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
541 sel.e.y = MAX(sel.by, sel.ey);
542 }
543
544 void
545 mousereport(XEvent *e) {
546 int x = X2COL(e->xbutton.x);
547 int y = Y2ROW(e->xbutton.y);
548 int button = e->xbutton.button;
549 int state = e->xbutton.state;
550 char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
551 static int ob, ox, oy;
552
553 /* from urxvt */
554 if(e->xbutton.type == MotionNotify) {
555 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
556 return;
557 button = ob + 32;
558 ox = x, oy = y;
559 } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
560 button = 3;
561 } else {
562 button -= Button1;
563 if(button >= 3)
564 button += 64 - 3;
565 if(e->xbutton.type == ButtonPress) {
566 ob = button;
567 ox = x, oy = y;
568 }
569 }
570
571 buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
572 + (state & Mod4Mask ? 8 : 0)
573 + (state & ControlMask ? 16 : 0);
574
575 ttywrite(buf, sizeof(buf));
576 }
577
578 void
579 bpress(XEvent *e) {
580 if(IS_SET(MODE_MOUSE))
581 mousereport(e);
582 else if(e->xbutton.button == Button1) {
583 if(sel.bx != -1) {
584 sel.bx = -1;
585 tsetdirt(sel.b.y, sel.e.y);
586 draw();
587 }
588 sel.mode = 1;
589 sel.ex = sel.bx = X2COL(e->xbutton.x);
590 sel.ey = sel.by = Y2ROW(e->xbutton.y);
591 }
592 }
593
594 void
595 selcopy(void) {
596 char *str, *ptr;
597 int x, y, bufsize, is_selected = 0;
598
599 if(sel.bx == -1)
600 str = NULL;
601
602 else {
603 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
604 ptr = str = xmalloc(bufsize);
605
606 /* append every set & selected glyph to the selection */
607 for(y = 0; y < term.row; y++) {
608 for(x = 0; x < term.col; x++) {
609 int size;
610 char *p;
611 Glyph *gp = &term.line[y][x];
612
613 if(!(is_selected = selected(x, y)))
614 continue;
615 p = (gp->state & GLYPH_SET) ? gp->c : " ";
616 size = utf8size(p);
617 memcpy(ptr, p, size);
618 ptr += size;
619 }
620 /* \n at the end of every selected line except for the last one */
621 if(is_selected && y < sel.e.y)
622 *ptr++ = '\n';
623 }
624 *ptr = 0;
625 }
626 sel.alt = IS_SET(MODE_ALTSCREEN);
627 xsetsel(str);
628 }
629
630 void
631 selnotify(XEvent *e) {
632 ulong nitems, ofs, rem;
633 int format;
634 uchar *data;
635 Atom type;
636
637 ofs = 0;
638 do {
639 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
640 False, AnyPropertyType, &type, &format,
641 &nitems, &rem, &data)) {
642 fprintf(stderr, "Clipboard allocation failed\n");
643 return;
644 }
645 ttywrite((const char *) data, nitems * format / 8);
646 XFree(data);
647 /* number of 32-bit chunks returned */
648 ofs += nitems * format / 32;
649 } while(rem > 0);
650 }
651
652 void
653 selpaste() {
654 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY, xw.win, CurrentTime);
655 }
656
657 void selclear(XEvent *e) {
658 if(sel.bx == -1)
659 return;
660 sel.bx = -1;
661 tsetdirt(sel.b.y, sel.e.y);
662 }
663
664 void
665 selrequest(XEvent *e) {
666 XSelectionRequestEvent *xsre;
667 XSelectionEvent xev;
668 Atom xa_targets;
669
670 xsre = (XSelectionRequestEvent *) e;
671 xev.type = SelectionNotify;
672 xev.requestor = xsre->requestor;
673 xev.selection = xsre->selection;
674 xev.target = xsre->target;
675 xev.time = xsre->time;
676 /* reject */
677 xev.property = None;
678
679 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
680 if(xsre->target == xa_targets) {
681 /* respond with the supported type */
682 Atom string = sel.xtarget;
683 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
684 XA_ATOM, 32, PropModeReplace,
685 (uchar *) &string, 1);
686 xev.property = xsre->property;
687 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
688 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
689 xsre->target, 8, PropModeReplace,
690 (uchar *) sel.clip, strlen(sel.clip));
691 xev.property = xsre->property;
692 }
693
694 /* all done, send a notification to the listener */
695 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
696 fprintf(stderr, "Error sending SelectionNotify event\n");
697 }
698
699 void
700 xsetsel(char *str) {
701 /* register the selection for both the clipboard and the primary */
702 Atom clipboard;
703
704 free(sel.clip);
705 sel.clip = str;
706
707 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
708
709 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
710 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
711 }
712
713 void
714 brelease(XEvent *e) {
715 if(IS_SET(MODE_MOUSE)) {
716 mousereport(e);
717 return;
718 }
719 if(e->xbutton.button == Button2)
720 selpaste();
721 else if(e->xbutton.button == Button1) {
722 sel.mode = 0;
723 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
724 term.dirty[sel.ey] = 1;
725 if(sel.bx == sel.ex && sel.by == sel.ey) {
726 struct timeval now;
727 sel.bx = -1;
728 gettimeofday(&now, NULL);
729
730 if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
731 /* triple click on the line */
732 sel.b.x = sel.bx = 0;
733 sel.e.x = sel.ex = term.col;
734 sel.b.y = sel.e.y = sel.ey;
735 selcopy();
736 } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
737 /* double click to select word */
738 sel.bx = sel.ex;
739 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
740 term.line[sel.ey][sel.bx-1].c[0] != ' ') sel.bx--;
741 sel.b.x = sel.bx;
742 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
743 term.line[sel.ey][sel.ex+1].c[0] != ' ') sel.ex++;
744 sel.e.x = sel.ex;
745 sel.b.y = sel.e.y = sel.ey;
746 selcopy();
747 }
748 } else
749 selcopy();
750 }
751 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
752 gettimeofday(&sel.tclick1, NULL);
753 }
754
755 void
756 bmotion(XEvent *e) {
757 if(IS_SET(MODE_MOUSE)) {
758 mousereport(e);
759 return;
760 }
761 if(sel.mode) {
762 int oldey = sel.ey, oldex = sel.ex;
763 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
764
765 if(oldey != sel.ey || oldex != sel.ex) {
766 int starty = MIN(oldey, sel.ey);
767 int endy = MAX(oldey, sel.ey);
768 tsetdirt(starty, endy);
769 }
770 }
771 }
772
773 void
774 die(const char *errstr, ...) {
775 va_list ap;
776
777 va_start(ap, errstr);
778 vfprintf(stderr, errstr, ap);
779 va_end(ap);
780 exit(EXIT_FAILURE);
781 }
782
783 void
784 execsh(void) {
785 char **args;
786 char *envshell = getenv("SHELL");
787
788 unsetenv("COLUMNS");
789 unsetenv("LINES");
790 unsetenv("TERMCAP");
791
792 signal(SIGCHLD, SIG_DFL);
793 signal(SIGHUP, SIG_DFL);
794 signal(SIGINT, SIG_DFL);
795 signal(SIGQUIT, SIG_DFL);
796 signal(SIGTERM, SIG_DFL);
797 signal(SIGALRM, SIG_DFL);
798
799 DEFAULT(envshell, SHELL);
800 putenv("TERM="TNAME);
801 args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
802 execvp(args[0], args);
803 exit(EXIT_FAILURE);
804 }
805
806 void
807 sigchld(int a) {
808 int stat = 0;
809 if(waitpid(pid, &stat, 0) < 0)
810 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
811 if(WIFEXITED(stat))
812 exit(WEXITSTATUS(stat));
813 else
814 exit(EXIT_FAILURE);
815 }
816
817 void
818 ttynew(void) {
819 int m, s;
820
821 /* seems to work fine on linux, openbsd and freebsd */
822 struct winsize w = {term.row, term.col, 0, 0};
823 if(openpty(&m, &s, NULL, NULL, &w) < 0)
824 die("openpty failed: %s\n", SERRNO);
825
826 switch(pid = fork()) {
827 case -1:
828 die("fork failed\n");
829 break;
830 case 0:
831 setsid(); /* create a new process group */
832 dup2(s, STDIN_FILENO);
833 dup2(s, STDOUT_FILENO);
834 dup2(s, STDERR_FILENO);
835 if(ioctl(s, TIOCSCTTY, NULL) < 0)
836 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
837 close(s);
838 close(m);
839 execsh();
840 break;
841 default:
842 close(s);
843 cmdfd = m;
844 signal(SIGCHLD, sigchld);
845 if(opt_io) {
846 if(!strcmp(opt_io, "-")) {
847 iofd = STDOUT_FILENO;
848 } else {
849 if((iofd = open(opt_io, O_WRONLY | O_CREAT, 0666)) < 0) {
850 fprintf(stderr, "Error opening %s:%s\n",
851 opt_io, strerror(errno));
852 }
853 }
854 }
855 }
856 }
857
858 void
859 dump(char c) {
860 static int col;
861 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
862 if(++col % 10 == 0)
863 fprintf(stderr, "\n");
864 }
865
866 void
867 ttyread(void) {
868 static char buf[BUFSIZ];
869 static int buflen = 0;
870 char *ptr;
871 char s[UTF_SIZ];
872 int charsize; /* size of utf8 char in bytes */
873 long utf8c;
874 int ret;
875
876 /* append read bytes to unprocessed bytes */
877 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
878 die("Couldn't read from shell: %s\n", SERRNO);
879
880 /* process every complete utf8 char */
881 buflen += ret;
882 ptr = buf;
883 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
884 charsize = utf8decode(ptr, &utf8c);
885 utf8encode(&utf8c, s);
886 tputc(s);
887 ptr += charsize;
888 buflen -= charsize;
889 }
890
891 /* keep any uncomplete utf8 char for the next call */
892 memmove(buf, ptr, buflen);
893 }
894
895 void
896 ttywrite(const char *s, size_t n) {
897 if(write(cmdfd, s, n) == -1)
898 die("write error on tty: %s\n", SERRNO);
899 }
900
901 void
902 ttyresize(void) {
903 struct winsize w;
904
905 w.ws_row = term.row;
906 w.ws_col = term.col;
907 w.ws_xpixel = xw.tw;
908 w.ws_ypixel = xw.th;
909 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
910 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
911 }
912
913 void
914 tsetdirt(int top, int bot)
915 {
916 int i;
917
918 LIMIT(top, 0, term.row-1);
919 LIMIT(bot, 0, term.row-1);
920
921 for(i = top; i <= bot; i++)
922 term.dirty[i] = 1;
923 }
924
925 void
926 tfulldirt(void)
927 {
928 tsetdirt(0, term.row-1);
929 }
930
931 void
932 tcursor(int mode) {
933 static TCursor c;
934
935 if(mode == CURSOR_SAVE)
936 c = term.c;
937 else if(mode == CURSOR_LOAD)
938 term.c = c, tmoveto(c.x, c.y);
939 }
940
941 void
942 treset(void) {
943 uint i;
944 term.c = (TCursor){{
945 .mode = ATTR_NULL,
946 .fg = DefaultFG,
947 .bg = DefaultBG
948 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
949
950 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
951 for(i = TAB; i < term.col; i += TAB)
952 term.tabs[i] = 1;
953 term.top = 0, term.bot = term.row - 1;
954 term.mode = MODE_WRAP;
955 xclear(0, 0, xw.w, xw.h);
956 tclearregion(0, 0, term.col-1, term.row-1);
957 }
958
959 void
960 tnew(int col, int row) {
961 /* set screen size */
962 term.row = row, term.col = col;
963 term.line = xmalloc(term.row * sizeof(Line));
964 term.alt = xmalloc(term.row * sizeof(Line));
965 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
966 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
967
968 for(row = 0; row < term.row; row++) {
969 term.line[row] = xmalloc(term.col * sizeof(Glyph));
970 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
971 term.dirty[row] = 0;
972 }
973 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
974 /* setup screen */
975 treset();
976 }
977
978 void
979 tswapscreen(void) {
980 Line* tmp = term.line;
981 term.line = term.alt;
982 term.alt = tmp;
983 term.mode ^= MODE_ALTSCREEN;
984 tfulldirt();
985 }
986
987 void
988 tscrolldown(int orig, int n) {
989 int i;
990 Line temp;
991
992 LIMIT(n, 0, term.bot-orig+1);
993
994 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
995
996 for(i = term.bot; i >= orig+n; i--) {
997 temp = term.line[i];
998 term.line[i] = term.line[i-n];
999 term.line[i-n] = temp;
1000
1001 term.dirty[i] = 1;
1002 term.dirty[i-n] = 1;
1003 }
1004
1005 selscroll(orig, n);
1006 }
1007
1008 void
1009 tscrollup(int orig, int n) {
1010 int i;
1011 Line temp;
1012 LIMIT(n, 0, term.bot-orig+1);
1013
1014 tclearregion(0, orig, term.col-1, orig+n-1);
1015
1016 for(i = orig; i <= term.bot-n; i++) {
1017 temp = term.line[i];
1018 term.line[i] = term.line[i+n];
1019 term.line[i+n] = temp;
1020
1021 term.dirty[i] = 1;
1022 term.dirty[i+n] = 1;
1023 }
1024
1025 selscroll(orig, -n);
1026 }
1027
1028 void
1029 selscroll(int orig, int n) {
1030 if(sel.bx == -1)
1031 return;
1032
1033 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1034 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1035 sel.bx = -1;
1036 return;
1037 }
1038 if(sel.by < term.top) {
1039 sel.by = term.top;
1040 sel.bx = 0;
1041 }
1042 if(sel.ey > term.bot) {
1043 sel.ey = term.bot;
1044 sel.ex = term.col;
1045 }
1046 sel.b.y = sel.by, sel.b.x = sel.bx;
1047 sel.e.y = sel.ey, sel.e.x = sel.ex;
1048 }
1049 }
1050
1051 void
1052 tnewline(int first_col) {
1053 int y = term.c.y;
1054 if(y == term.bot)
1055 tscrollup(term.top, 1);
1056 else
1057 y++;
1058 tmoveto(first_col ? 0 : term.c.x, y);
1059 }
1060
1061 void
1062 csiparse(void) {
1063 /* int noarg = 1; */
1064 char *p = csiescseq.buf;
1065
1066 csiescseq.narg = 0;
1067 if(*p == '?')
1068 csiescseq.priv = 1, p++;
1069
1070 while(p < csiescseq.buf+csiescseq.len) {
1071 while(isdigit(*p)) {
1072 csiescseq.arg[csiescseq.narg] *= 10;
1073 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1074 }
1075 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ)
1076 csiescseq.narg++, p++;
1077 else {
1078 csiescseq.mode = *p;
1079 csiescseq.narg++;
1080 return;
1081 }
1082 }
1083 }
1084
1085 void
1086 tmoveto(int x, int y) {
1087 LIMIT(x, 0, term.col-1);
1088 LIMIT(y, 0, term.row-1);
1089 term.c.state &= ~CURSOR_WRAPNEXT;
1090 term.c.x = x;
1091 term.c.y = y;
1092 }
1093
1094 void
1095 tsetchar(char *c) {
1096 term.dirty[term.c.y] = 1;
1097 term.line[term.c.y][term.c.x] = term.c.attr;
1098 memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
1099 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
1100 }
1101
1102 void
1103 tclearregion(int x1, int y1, int x2, int y2) {
1104 int x, y, temp;
1105
1106 if(x1 > x2)
1107 temp = x1, x1 = x2, x2 = temp;
1108 if(y1 > y2)
1109 temp = y1, y1 = y2, y2 = temp;
1110
1111 LIMIT(x1, 0, term.col-1);
1112 LIMIT(x2, 0, term.col-1);
1113 LIMIT(y1, 0, term.row-1);
1114 LIMIT(y2, 0, term.row-1);
1115
1116 for(y = y1; y <= y2; y++) {
1117 term.dirty[y] = 1;
1118 for(x = x1; x <= x2; x++)
1119 term.line[y][x].state = 0;
1120 }
1121 }
1122
1123 void
1124 tdeletechar(int n) {
1125 int src = term.c.x + n;
1126 int dst = term.c.x;
1127 int size = term.col - src;
1128
1129 term.dirty[term.c.y] = 1;
1130
1131 if(src >= term.col) {
1132 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1133 return;
1134 }
1135 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1136 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1137 }
1138
1139 void
1140 tinsertblank(int n) {
1141 int src = term.c.x;
1142 int dst = src + n;
1143 int size = term.col - dst;
1144
1145 term.dirty[term.c.y] = 1;
1146
1147 if(dst >= term.col) {
1148 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1149 return;
1150 }
1151 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1152 tclearregion(src, term.c.y, dst - 1, term.c.y);
1153 }
1154
1155 void
1156 tinsertblankline(int n) {
1157 if(term.c.y < term.top || term.c.y > term.bot)
1158 return;
1159
1160 tscrolldown(term.c.y, n);
1161 }
1162
1163 void
1164 tdeleteline(int n) {
1165 if(term.c.y < term.top || term.c.y > term.bot)
1166 return;
1167
1168 tscrollup(term.c.y, n);
1169 }
1170
1171 void
1172 tsetattr(int *attr, int l) {
1173 int i;
1174
1175 for(i = 0; i < l; i++) {
1176 switch(attr[i]) {
1177 case 0:
1178 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1179 | ATTR_ITALIC | ATTR_BLINK);
1180 term.c.attr.fg = DefaultFG;
1181 term.c.attr.bg = DefaultBG;
1182 break;
1183 case 1:
1184 term.c.attr.mode |= ATTR_BOLD;
1185 break;
1186 case 3: /* enter standout (highlight) */
1187 term.c.attr.mode |= ATTR_ITALIC;
1188 break;
1189 case 4:
1190 term.c.attr.mode |= ATTR_UNDERLINE;
1191 break;
1192 case 5:
1193 term.c.attr.mode |= ATTR_BLINK;
1194 break;
1195 case 7:
1196 term.c.attr.mode |= ATTR_REVERSE;
1197 break;
1198 case 21:
1199 case 22:
1200 term.c.attr.mode &= ~ATTR_BOLD;
1201 break;
1202 case 23: /* leave standout (highlight) mode */
1203 term.c.attr.mode &= ~ATTR_ITALIC;
1204 break;
1205 case 24:
1206 term.c.attr.mode &= ~ATTR_UNDERLINE;
1207 break;
1208 case 25:
1209 term.c.attr.mode &= ~ATTR_BLINK;
1210 break;
1211 case 27:
1212 term.c.attr.mode &= ~ATTR_REVERSE;
1213 break;
1214 case 38:
1215 if(i + 2 < l && attr[i + 1] == 5) {
1216 i += 2;
1217 if(BETWEEN(attr[i], 0, 255))
1218 term.c.attr.fg = attr[i];
1219 else
1220 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
1221 }
1222 else
1223 fprintf(stderr, "erresc(38): gfx attr %d unknown\n", attr[i]);
1224 break;
1225 case 39:
1226 term.c.attr.fg = DefaultFG;
1227 break;
1228 case 48:
1229 if(i + 2 < l && attr[i + 1] == 5) {
1230 i += 2;
1231 if(BETWEEN(attr[i], 0, 255))
1232 term.c.attr.bg = attr[i];
1233 else
1234 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
1235 }
1236 else
1237 fprintf(stderr, "erresc(48): gfx attr %d unknown\n", attr[i]);
1238 break;
1239 case 49:
1240 term.c.attr.bg = DefaultBG;
1241 break;
1242 default:
1243 if(BETWEEN(attr[i], 30, 37))
1244 term.c.attr.fg = attr[i] - 30;
1245 else if(BETWEEN(attr[i], 40, 47))
1246 term.c.attr.bg = attr[i] - 40;
1247 else if(BETWEEN(attr[i], 90, 97))
1248 term.c.attr.fg = attr[i] - 90 + 8;
1249 else if(BETWEEN(attr[i], 100, 107))
1250 term.c.attr.bg = attr[i] - 100 + 8;
1251 else
1252 fprintf(stderr, "erresc(default): gfx attr %d unknown\n", attr[i]), csidump();
1253 break;
1254 }
1255 }
1256 }
1257
1258 void
1259 tsetscroll(int t, int b) {
1260 int temp;
1261
1262 LIMIT(t, 0, term.row-1);
1263 LIMIT(b, 0, term.row-1);
1264 if(t > b) {
1265 temp = t;
1266 t = b;
1267 b = temp;
1268 }
1269 term.top = t;
1270 term.bot = b;
1271 }
1272
1273 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1274
1275 void
1276 tsetmode(bool priv, bool set, int *args, int narg) {
1277 int *lim, mode;
1278
1279 for(lim = args + narg; args < lim; ++args) {
1280 if(priv) {
1281 switch(*args) {
1282 case 1:
1283 MODBIT(term.mode, set, MODE_APPKEYPAD);
1284 break;
1285 case 5: /* DECSCNM -- Reverve video */
1286 mode = term.mode;
1287 MODBIT(term.mode,set, MODE_REVERSE);
1288 if(mode != term.mode)
1289 redraw();
1290 break;
1291 case 7:
1292 MODBIT(term.mode, set, MODE_WRAP);
1293 break;
1294 case 20:
1295 MODBIT(term.mode, set, MODE_CRLF);
1296 break;
1297 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1298 break;
1299 case 25:
1300 MODBIT(term.c.state, !set, CURSOR_HIDE);
1301 break;
1302 case 1000: /* 1000,1002: enable xterm mouse report */
1303 MODBIT(term.mode, set, MODE_MOUSEBTN);
1304 break;
1305 case 1002:
1306 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1307 break;
1308 case 1049: /* = 1047 and 1048 */
1309 case 47:
1310 case 1047:
1311 if(IS_SET(MODE_ALTSCREEN))
1312 tclearregion(0, 0, term.col-1, term.row-1);
1313 if((set && !IS_SET(MODE_ALTSCREEN)) ||
1314 (!set && IS_SET(MODE_ALTSCREEN))) {
1315 tswapscreen();
1316 }
1317 if(*args != 1049)
1318 break;
1319 /* pass through */
1320 case 1048:
1321 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1322 break;
1323 default:
1324 fprintf(stderr,
1325 "erresc: unknown private set/reset mode %d\n",
1326 *args);
1327 break;
1328 }
1329 } else {
1330 switch(*args) {
1331 case 4:
1332 MODBIT(term.mode, set, MODE_INSERT);
1333 break;
1334 default:
1335 fprintf(stderr,
1336 "erresc: unknown set/reset mode %d\n",
1337 *args);
1338 break;
1339 }
1340 }
1341 }
1342 }
1343 #undef MODBIT
1344
1345
1346 void
1347 csihandle(void) {
1348 switch(csiescseq.mode) {
1349 default:
1350 unknown:
1351 fprintf(stderr, "erresc: unknown csi ");
1352 csidump();
1353 /* die(""); */
1354 break;
1355 case '@': /* ICH -- Insert <n> blank char */
1356 DEFAULT(csiescseq.arg[0], 1);
1357 tinsertblank(csiescseq.arg[0]);
1358 break;
1359 case 'A': /* CUU -- Cursor <n> Up */
1360 case 'e':
1361 DEFAULT(csiescseq.arg[0], 1);
1362 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1363 break;
1364 case 'B': /* CUD -- Cursor <n> Down */
1365 DEFAULT(csiescseq.arg[0], 1);
1366 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1367 break;
1368 case 'C': /* CUF -- Cursor <n> Forward */
1369 case 'a':
1370 DEFAULT(csiescseq.arg[0], 1);
1371 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1372 break;
1373 case 'D': /* CUB -- Cursor <n> Backward */
1374 DEFAULT(csiescseq.arg[0], 1);
1375 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1376 break;
1377 case 'E': /* CNL -- Cursor <n> Down and first col */
1378 DEFAULT(csiescseq.arg[0], 1);
1379 tmoveto(0, term.c.y+csiescseq.arg[0]);
1380 break;
1381 case 'F': /* CPL -- Cursor <n> Up and first col */
1382 DEFAULT(csiescseq.arg[0], 1);
1383 tmoveto(0, term.c.y-csiescseq.arg[0]);
1384 break;
1385 case 'g': /* TBC -- Tabulation clear */
1386 switch (csiescseq.arg[0]) {
1387 case 0: /* clear current tab stop */
1388 term.tabs[term.c.x] = 0;
1389 break;
1390 case 3: /* clear all the tabs */
1391 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1392 break;
1393 default:
1394 goto unknown;
1395 }
1396 break;
1397 case 'G': /* CHA -- Move to <col> */
1398 case '`': /* HPA */
1399 DEFAULT(csiescseq.arg[0], 1);
1400 tmoveto(csiescseq.arg[0]-1, term.c.y);
1401 break;
1402 case 'H': /* CUP -- Move to <row> <col> */
1403 case 'f': /* HVP */
1404 DEFAULT(csiescseq.arg[0], 1);
1405 DEFAULT(csiescseq.arg[1], 1);
1406 tmoveto(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1407 break;
1408 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1409 DEFAULT(csiescseq.arg[0], 1);
1410 while(csiescseq.arg[0]--)
1411 tputtab(1);
1412 break;
1413 case 'J': /* ED -- Clear screen */
1414 sel.bx = -1;
1415 switch(csiescseq.arg[0]) {
1416 case 0: /* below */
1417 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1418 if(term.c.y < term.row-1)
1419 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1420 break;
1421 case 1: /* above */
1422 if(term.c.y > 1)
1423 tclearregion(0, 0, term.col-1, term.c.y-1);
1424 tclearregion(0, term.c.y, term.c.x, term.c.y);
1425 break;
1426 case 2: /* all */
1427 tclearregion(0, 0, term.col-1, term.row-1);
1428 break;
1429 default:
1430 goto unknown;
1431 }
1432 break;
1433 case 'K': /* EL -- Clear line */
1434 switch(csiescseq.arg[0]) {
1435 case 0: /* right */
1436 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1437 break;
1438 case 1: /* left */
1439 tclearregion(0, term.c.y, term.c.x, term.c.y);
1440 break;
1441 case 2: /* all */
1442 tclearregion(0, term.c.y, term.col-1, term.c.y);
1443 break;
1444 }
1445 break;
1446 case 'S': /* SU -- Scroll <n> line up */
1447 DEFAULT(csiescseq.arg[0], 1);
1448 tscrollup(term.top, csiescseq.arg[0]);
1449 break;
1450 case 'T': /* SD -- Scroll <n> line down */
1451 DEFAULT(csiescseq.arg[0], 1);
1452 tscrolldown(term.top, csiescseq.arg[0]);
1453 break;
1454 case 'L': /* IL -- Insert <n> blank lines */
1455 DEFAULT(csiescseq.arg[0], 1);
1456 tinsertblankline(csiescseq.arg[0]);
1457 break;
1458 case 'l': /* RM -- Reset Mode */
1459 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1460 break;
1461 case 'M': /* DL -- Delete <n> lines */
1462 DEFAULT(csiescseq.arg[0], 1);
1463 tdeleteline(csiescseq.arg[0]);
1464 break;
1465 case 'X': /* ECH -- Erase <n> char */
1466 DEFAULT(csiescseq.arg[0], 1);
1467 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
1468 break;
1469 case 'P': /* DCH -- Delete <n> char */
1470 DEFAULT(csiescseq.arg[0], 1);
1471 tdeletechar(csiescseq.arg[0]);
1472 break;
1473 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1474 DEFAULT(csiescseq.arg[0], 1);
1475 while(csiescseq.arg[0]--)
1476 tputtab(0);
1477 break;
1478 case 'd': /* VPA -- Move to <row> */
1479 DEFAULT(csiescseq.arg[0], 1);
1480 tmoveto(term.c.x, csiescseq.arg[0]-1);
1481 break;
1482 case 'h': /* SM -- Set terminal mode */
1483 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1484 break;
1485 case 'm': /* SGR -- Terminal attribute (color) */
1486 tsetattr(csiescseq.arg, csiescseq.narg);
1487 break;
1488 case 'r': /* DECSTBM -- Set Scrolling Region */
1489 if(csiescseq.priv)
1490 goto unknown;
1491 else {
1492 DEFAULT(csiescseq.arg[0], 1);
1493 DEFAULT(csiescseq.arg[1], term.row);
1494 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1495 tmoveto(0, 0);
1496 }
1497 break;
1498 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1499 tcursor(CURSOR_SAVE);
1500 break;
1501 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1502 tcursor(CURSOR_LOAD);
1503 break;
1504 }
1505 }
1506
1507 void
1508 csidump(void) {
1509 int i;
1510 printf("ESC[");
1511 for(i = 0; i < csiescseq.len; i++) {
1512 uint c = csiescseq.buf[i] & 0xff;
1513 if(isprint(c)) putchar(c);
1514 else if(c == '\n') printf("(\\n)");
1515 else if(c == '\r') printf("(\\r)");
1516 else if(c == 0x1b) printf("(\\e)");
1517 else printf("(%02x)", c);
1518 }
1519 putchar('\n');
1520 }
1521
1522 void
1523 csireset(void) {
1524 memset(&csiescseq, 0, sizeof(csiescseq));
1525 }
1526
1527 void
1528 strhandle(void) {
1529 char *p;
1530
1531 /*
1532 * TODO: make this being useful in case of color palette change.
1533 */
1534 strparse();
1535
1536 p = strescseq.buf;
1537
1538 switch(strescseq.type) {
1539 case ']': /* OSC -- Operating System Command */
1540 switch(p[0]) {
1541 case '0':
1542 case '1':
1543 case '2':
1544 /*
1545 * TODO: Handle special chars in string, like umlauts.
1546 */
1547 if(p[1] == ';') {
1548 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1549 }
1550 break;
1551 case ';':
1552 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1553 break;
1554 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1555 break;
1556 default:
1557 fprintf(stderr, "erresc: unknown str ");
1558 strdump();
1559 break;
1560 }
1561 break;
1562 case 'k': /* old title set compatibility */
1563 XStoreName(xw.dpy, xw.win, strescseq.buf);
1564 break;
1565 case 'P': /* DSC -- Device Control String */
1566 case '_': /* APC -- Application Program Command */
1567 case '^': /* PM -- Privacy Message */
1568 default:
1569 fprintf(stderr, "erresc: unknown str ");
1570 strdump();
1571 /* die(""); */
1572 break;
1573 }
1574 }
1575
1576 void
1577 strparse(void) {
1578 /*
1579 * TODO: Implement parsing like for CSI when required.
1580 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1581 */
1582 return;
1583 }
1584
1585 void
1586 strdump(void) {
1587 int i;
1588 printf("ESC%c", strescseq.type);
1589 for(i = 0; i < strescseq.len; i++) {
1590 uint c = strescseq.buf[i] & 0xff;
1591 if(isprint(c)) putchar(c);
1592 else if(c == '\n') printf("(\\n)");
1593 else if(c == '\r') printf("(\\r)");
1594 else if(c == 0x1b) printf("(\\e)");
1595 else printf("(%02x)", c);
1596 }
1597 printf("ESC\\\n");
1598 }
1599
1600 void
1601 strreset(void) {
1602 memset(&strescseq, 0, sizeof(strescseq));
1603 }
1604
1605 void
1606 tputtab(bool forward) {
1607 uint x = term.c.x;
1608
1609 if(forward) {
1610 if(x == term.col)
1611 return;
1612 for(++x; x < term.col && !term.tabs[x]; ++x)
1613 /* nothing */ ;
1614 } else {
1615 if(x == 0)
1616 return;
1617 for(--x; x > 0 && !term.tabs[x]; --x)
1618 /* nothing */ ;
1619 }
1620 tmoveto(x, term.c.y);
1621 }
1622
1623 void
1624 tputc(char *c) {
1625 char ascii = *c;
1626
1627 if(iofd != -1)
1628 write(iofd, c, 1);
1629
1630 if(term.esc & ESC_START) {
1631 if(term.esc & ESC_CSI) {
1632 csiescseq.buf[csiescseq.len++] = ascii;
1633 if(BETWEEN(ascii, 0x40, 0x7E) || csiescseq.len >= ESC_BUF_SIZ) {
1634 term.esc = 0;
1635 csiparse(), csihandle();
1636 }
1637 } else if(term.esc & ESC_STR) {
1638 switch(ascii) {
1639 case '\033':
1640 term.esc = ESC_START | ESC_STR_END;
1641 break;
1642 case '\a': /* backwards compatibility to xterm */
1643 term.esc = 0;
1644 strhandle();
1645 break;
1646 default:
1647 strescseq.buf[strescseq.len++] = ascii;
1648 if(strescseq.len+1 >= STR_BUF_SIZ) {
1649 term.esc = 0;
1650 strhandle();
1651 }
1652 }
1653 } else if(term.esc & ESC_STR_END) {
1654 term.esc = 0;
1655 if(ascii == '\\')
1656 strhandle();
1657 } else if(term.esc & ESC_ALTCHARSET) {
1658 switch(ascii) {
1659 case '0': /* Line drawing crap */
1660 term.c.attr.mode |= ATTR_GFX;
1661 break;
1662 case 'B': /* Back to regular text */
1663 term.c.attr.mode &= ~ATTR_GFX;
1664 break;
1665 default:
1666 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1667 }
1668 term.esc = 0;
1669 } else {
1670 switch(ascii) {
1671 case '[':
1672 term.esc |= ESC_CSI;
1673 break;
1674 case 'P': /* DCS -- Device Control String */
1675 case '_': /* APC -- Application Program Command */
1676 case '^': /* PM -- Privacy Message */
1677 case ']': /* OSC -- Operating System Command */
1678 case 'k': /* old title set compatibility */
1679 strreset();
1680 strescseq.type = ascii;
1681 term.esc |= ESC_STR;
1682 break;
1683 case '(':
1684 term.esc |= ESC_ALTCHARSET;
1685 break;
1686 case 'D': /* IND -- Linefeed */
1687 if(term.c.y == term.bot)
1688 tscrollup(term.top, 1);
1689 else
1690 tmoveto(term.c.x, term.c.y+1);
1691 term.esc = 0;
1692 break;
1693 case 'E': /* NEL -- Next line */
1694 tnewline(1); /* always go to first col */
1695 term.esc = 0;
1696 break;
1697 case 'H': /* HTS -- Horizontal tab stop */
1698 term.tabs[term.c.x] = 1;
1699 term.esc = 0;
1700 break;
1701 case 'M': /* RI -- Reverse index */
1702 if(term.c.y == term.top)
1703 tscrolldown(term.top, 1);
1704 else
1705 tmoveto(term.c.x, term.c.y-1);
1706 term.esc = 0;
1707 break;
1708 case 'c': /* RIS -- Reset to inital state */
1709 treset();
1710 term.esc = 0;
1711 xresettitle();
1712 break;
1713 case '=': /* DECPAM -- Application keypad */
1714 term.mode |= MODE_APPKEYPAD;
1715 term.esc = 0;
1716 break;
1717 case '>': /* DECPNM -- Normal keypad */
1718 term.mode &= ~MODE_APPKEYPAD;
1719 term.esc = 0;
1720 break;
1721 case '7': /* DECSC -- Save Cursor */
1722 tcursor(CURSOR_SAVE);
1723 term.esc = 0;
1724 break;
1725 case '8': /* DECRC -- Restore Cursor */
1726 tcursor(CURSOR_LOAD);
1727 term.esc = 0;
1728 break;
1729 case '\\': /* ST -- Stop */
1730 term.esc = 0;
1731 break;
1732 default:
1733 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
1734 (uchar) ascii, isprint(ascii)?ascii:'.');
1735 term.esc = 0;
1736 }
1737 }
1738 } else {
1739 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
1740 sel.bx = -1;
1741 switch(ascii) {
1742 case '\0': /* padding character, do nothing */
1743 break;
1744 case '\t':
1745 tputtab(1);
1746 break;
1747 case '\b':
1748 tmoveto(term.c.x-1, term.c.y);
1749 break;
1750 case '\r':
1751 tmoveto(0, term.c.y);
1752 break;
1753 case '\f':
1754 case '\v':
1755 case '\n':
1756 /* go to first col if the mode is set */
1757 tnewline(IS_SET(MODE_CRLF));
1758 break;
1759 case '\a':
1760 if(!(xw.state & WIN_FOCUSED))
1761 xseturgency(1);
1762 break;
1763 case '\033':
1764 csireset();
1765 term.esc = ESC_START;
1766 break;
1767 default:
1768 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1769 tnewline(1); /* always go to first col */
1770 tsetchar(c);
1771 if(term.c.x+1 < term.col)
1772 tmoveto(term.c.x+1, term.c.y);
1773 else
1774 term.c.state |= CURSOR_WRAPNEXT;
1775 }
1776 }
1777 }
1778
1779 int
1780 tresize(int col, int row) {
1781 int i, x;
1782 int minrow = MIN(row, term.row);
1783 int mincol = MIN(col, term.col);
1784 int slide = term.c.y - row + 1;
1785
1786 if(col < 1 || row < 1)
1787 return 0;
1788
1789 /* free unneeded rows */
1790 i = 0;
1791 if(slide > 0) {
1792 /* slide screen to keep cursor where we expect it -
1793 * tscrollup would work here, but we can optimize to
1794 * memmove because we're freeing the earlier lines */
1795 for(/* i = 0 */; i < slide; i++) {
1796 free(term.line[i]);
1797 free(term.alt[i]);
1798 }
1799 memmove(term.line, term.line + slide, row * sizeof(Line));
1800 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1801 }
1802 for(i += row; i < term.row; i++) {
1803 free(term.line[i]);
1804 free(term.alt[i]);
1805 }
1806
1807 /* resize to new height */
1808 term.line = xrealloc(term.line, row * sizeof(Line));
1809 term.alt = xrealloc(term.alt, row * sizeof(Line));
1810 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
1811 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
1812
1813 /* resize each row to new width, zero-pad if needed */
1814 for(i = 0; i < minrow; i++) {
1815 term.dirty[i] = 1;
1816 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
1817 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
1818 for(x = mincol; x < col; x++) {
1819 term.line[i][x].state = 0;
1820 term.alt[i][x].state = 0;
1821 }
1822 }
1823
1824 /* allocate any new rows */
1825 for(/* i == minrow */; i < row; i++) {
1826 term.dirty[i] = 1;
1827 term.line[i] = xcalloc(col, sizeof(Glyph));
1828 term.alt [i] = xcalloc(col, sizeof(Glyph));
1829 }
1830 if(col > term.col) {
1831 bool *bp = term.tabs + term.col;
1832
1833 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
1834 while(--bp > term.tabs && !*bp)
1835 /* nothing */ ;
1836 for(bp += TAB; bp < term.tabs + col; bp += TAB)
1837 *bp = 1;
1838 }
1839 /* update terminal size */
1840 term.col = col, term.row = row;
1841 /* make use of the LIMIT in tmoveto */
1842 tmoveto(term.c.x, term.c.y);
1843 /* reset scrolling region */
1844 tsetscroll(0, row-1);
1845
1846 return (slide > 0);
1847 }
1848
1849 void
1850 xresize(int col, int row) {
1851 xw.tw = MAX(1, 2*BORDER + col * xw.cw);
1852 xw.th = MAX(1, 2*BORDER + row * xw.ch);
1853
1854 XftDrawChange(xw.xft_draw, xw.buf);
1855 }
1856
1857 void
1858 xloadcols(void) {
1859 int i, r, g, b;
1860 XRenderColor xft_color = { .alpha = 0 };
1861 ulong white = WhitePixel(xw.dpy, xw.scr);
1862
1863 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
1864 for(i = 0; i < LEN(colorname); i++) {
1865 if(!colorname[i])
1866 continue;
1867 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.xft_col[i])) {
1868 dc.col[i] = white;
1869 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1870 } else
1871 dc.col[i] = dc.xft_col[i].pixel;
1872 }
1873
1874 /* load colors [16-255] ; same colors as xterm */
1875 for(i = 16, r = 0; r < 6; r++)
1876 for(g = 0; g < 6; g++)
1877 for(b = 0; b < 6; b++) {
1878 xft_color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1879 xft_color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1880 xft_color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1881 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &xft_color, &dc.xft_col[i])) {
1882 dc.col[i] = white;
1883 fprintf(stderr, "Could not allocate color %d\n", i);
1884 } else
1885 dc.col[i] = dc.xft_col[i].pixel;
1886 i++;
1887 }
1888
1889 for(r = 0; r < 24; r++, i++) {
1890 xft_color.red = xft_color.green = xft_color.blue = 0x0808 + 0x0a0a * r;
1891 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &xft_color, &dc.xft_col[i])) {
1892 dc.col[i] = white;
1893 fprintf(stderr, "Could not allocate color %d\n", i);
1894 } else
1895 dc.col[i] = dc.xft_col[i].pixel;
1896 }
1897 }
1898
1899 void
1900 xclear(int x1, int y1, int x2, int y2) {
1901 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
1902 XFillRectangle(xw.dpy, xw.buf, dc.gc,
1903 BORDER + x1 * xw.cw, BORDER + y1 * xw.ch,
1904 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1905 }
1906
1907 void
1908 xhints(void) {
1909 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
1910 XWMHints wm = {.flags = InputHint, .input = 1};
1911 XSizeHints *sizeh = NULL;
1912
1913 sizeh = XAllocSizeHints();
1914 if(xw.isfixed == False) {
1915 sizeh->flags = PSize | PResizeInc | PBaseSize;
1916 sizeh->height = xw.h;
1917 sizeh->width = xw.w;
1918 sizeh->height_inc = xw.ch;
1919 sizeh->width_inc = xw.cw;
1920 sizeh->base_height = 2*BORDER;
1921 sizeh->base_width = 2*BORDER;
1922 } else {
1923 sizeh->flags = PMaxSize | PMinSize;
1924 sizeh->min_width = sizeh->max_width = xw.fw;
1925 sizeh->min_height = sizeh->max_height = xw.fh;
1926 }
1927
1928 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
1929 XFree(sizeh);
1930 }
1931
1932 void
1933 xinitfont(Font *f, char *fontstr) {
1934 f->xft_set = XftFontOpenName(xw.dpy, xw.scr, fontstr);
1935
1936 if(!f->xft_set)
1937 die("st: can't open font %s.\n", fontstr);
1938
1939 f->ascent = f->xft_set->ascent;
1940 f->descent = f->xft_set->descent;
1941 f->lbearing = 0;
1942 f->rbearing = f->xft_set->max_advance_width;
1943 }
1944
1945 void
1946 initfonts(char *fontstr, char *bfontstr, char *ifontstr, char *ibfontstr) {
1947 xinitfont(&dc.font, fontstr);
1948 xinitfont(&dc.bfont, bfontstr);
1949 xinitfont(&dc.ifont, ifontstr);
1950 xinitfont(&dc.ibfont, ibfontstr);
1951 }
1952
1953 void
1954 xinit(void) {
1955 XSetWindowAttributes attrs;
1956 Cursor cursor;
1957 Window parent;
1958 int sw, sh, major, minor;
1959
1960 if(!(xw.dpy = XOpenDisplay(NULL)))
1961 die("Can't open display\n");
1962 xw.scr = XDefaultScreen(xw.dpy);
1963 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
1964
1965 /* font */
1966 initfonts(FONT, BOLDFONT, ITALICFONT, ITALICBOLDFONT);
1967
1968 /* XXX: Assuming same size for bold font */
1969 xw.cw = dc.font.rbearing - dc.font.lbearing;
1970 xw.ch = dc.font.ascent + dc.font.descent;
1971
1972 /* colors */
1973 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1974 xloadcols();
1975
1976 /* adjust fixed window geometry */
1977 if(xw.isfixed) {
1978 sw = DisplayWidth(xw.dpy, xw.scr);
1979 sh = DisplayHeight(xw.dpy, xw.scr);
1980 if(xw.fx < 0)
1981 xw.fx = sw + xw.fx - xw.fw - 1;
1982 if(xw.fy < 0)
1983 xw.fy = sh + xw.fy - xw.fh - 1;
1984
1985 xw.h = xw.fh;
1986 xw.w = xw.fw;
1987 } else {
1988 /* window - default size */
1989 xw.h = 2*BORDER + term.row * xw.ch;
1990 xw.w = 2*BORDER + term.col * xw.cw;
1991 xw.fx = 0;
1992 xw.fy = 0;
1993 }
1994
1995 attrs.background_pixel = dc.col[DefaultBG];
1996 attrs.border_pixel = dc.col[DefaultBG];
1997 attrs.bit_gravity = NorthWestGravity;
1998 attrs.event_mask = FocusChangeMask | KeyPressMask
1999 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2000 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2001 attrs.colormap = xw.cmap;
2002
2003 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
2004 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2005 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2006 xw.vis,
2007 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2008 | CWColormap,
2009 &attrs);
2010
2011 /* double buffering */
2012 if(!XdbeQueryExtension(xw.dpy, &major, &minor))
2013 die("Xdbe extension is not present\n");
2014 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
2015
2016 /* Xft rendering context */
2017 xw.xft_draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2018
2019 /* input methods */
2020 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
2021 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2022 | XIMStatusNothing, XNClientWindow, xw.win,
2023 XNFocusWindow, xw.win, NULL);
2024 /* gc */
2025 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
2026
2027 /* white cursor, black outline */
2028 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2029 XDefineCursor(xw.dpy, xw.win, cursor);
2030 XRecolorCursor(xw.dpy, cursor,
2031 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2032 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2033
2034 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2035
2036 xresettitle();
2037 XMapWindow(xw.dpy, xw.win);
2038 xhints();
2039 XSync(xw.dpy, 0);
2040 }
2041
2042 void
2043 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2044 int fg = base.fg, bg = base.bg, temp;
2045 int winx = BORDER+x*xw.cw, winy = BORDER+y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
2046 Font *font = &dc.font;
2047 XGlyphInfo extents;
2048 int i;
2049
2050 /* only switch default fg/bg if term is in RV mode */
2051 if(IS_SET(MODE_REVERSE)) {
2052 if(fg == DefaultFG)
2053 fg = DefaultBG;
2054 if(bg == DefaultBG)
2055 bg = DefaultFG;
2056 }
2057
2058 if(base.mode & ATTR_REVERSE)
2059 temp = fg, fg = bg, bg = temp;
2060
2061 if(base.mode & ATTR_BOLD) {
2062 fg += 8;
2063 font = &dc.bfont;
2064 }
2065
2066 if(base.mode & ATTR_ITALIC)
2067 font = &dc.ifont;
2068 if(base.mode & (ATTR_ITALIC|ATTR_ITALIC))
2069 font = &dc.ibfont;
2070
2071 XSetBackground(xw.dpy, dc.gc, dc.col[bg]);
2072 XSetForeground(xw.dpy, dc.gc, dc.col[fg]);
2073
2074 if(base.mode & ATTR_GFX) {
2075 for(i = 0; i < bytelen; i++) {
2076 char c = gfx[(uint)s[i] % 256];
2077 if(c)
2078 s[i] = c;
2079 else if(s[i] > 0x5f)
2080 s[i] -= 0x5f;
2081 }
2082 }
2083
2084 XftTextExtentsUtf8(xw.dpy, font->xft_set, (FcChar8 *)s, bytelen, &extents);
2085 width = extents.xOff;
2086 XftDrawRect(xw.xft_draw, &dc.xft_col[bg], winx, winy - font->ascent, width, xw.ch);
2087 XftDrawStringUtf8(xw.xft_draw, &dc.xft_col[fg], font->xft_set, winx, winy, (FcChar8 *)s, bytelen);
2088
2089 if(base.mode & ATTR_UNDERLINE)
2090 XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
2091 }
2092
2093 void
2094 xdrawcursor(void) {
2095 static int oldx = 0;
2096 static int oldy = 0;
2097 int sl;
2098 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
2099
2100 LIMIT(oldx, 0, term.col-1);
2101 LIMIT(oldy, 0, term.row-1);
2102
2103 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2104 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2105
2106 /* remove the old cursor */
2107 if(term.line[oldy][oldx].state & GLYPH_SET) {
2108 sl = utf8size(term.line[oldy][oldx].c);
2109 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
2110 } else
2111 xclear(oldx, oldy, oldx, oldy);
2112
2113 /* draw the new one */
2114 if(!(term.c.state & CURSOR_HIDE)) {
2115 if(!(xw.state & WIN_FOCUSED))
2116 g.bg = DefaultUCS;
2117
2118 if(IS_SET(MODE_REVERSE))
2119 g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
2120
2121 sl = utf8size(g.c);
2122 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2123 oldx = term.c.x, oldy = term.c.y;
2124 }
2125 }
2126
2127 void
2128 xresettitle(void) {
2129 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
2130 }
2131
2132 void
2133 redraw(void) {
2134 struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
2135
2136 xclear(0, 0, xw.w, xw.h);
2137 tfulldirt();
2138 draw();
2139 XSync(xw.dpy, False); /* necessary for a good tput flash */
2140 nanosleep(&tv, NULL);
2141 }
2142
2143 void
2144 draw() {
2145 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2146
2147 drawregion(0, 0, term.col, term.row);
2148 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2149 }
2150
2151 void
2152 drawregion(int x1, int y1, int x2, int y2) {
2153 int ic, ib, x, y, ox, sl;
2154 Glyph base, new;
2155 char buf[DRAW_BUF_SIZ];
2156 bool ena_sel = sel.bx != -1, alt = IS_SET(MODE_ALTSCREEN);
2157
2158 if((sel.alt && !alt) || (!sel.alt && alt))
2159 ena_sel = 0;
2160 if(!(xw.state & WIN_VISIBLE))
2161 return;
2162
2163 for(y = y1; y < y2; y++) {
2164 if(!term.dirty[y])
2165 continue;
2166 xclear(0, y, term.col, y);
2167 term.dirty[y] = 0;
2168 base = term.line[y][0];
2169 ic = ib = ox = 0;
2170 for(x = x1; x < x2; x++) {
2171 new = term.line[y][x];
2172 if(ena_sel && *(new.c) && selected(x, y))
2173 new.mode ^= ATTR_REVERSE;
2174 if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
2175 ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2176 xdraws(buf, base, ox, y, ic, ib);
2177 ic = ib = 0;
2178 }
2179 if(new.state & GLYPH_SET) {
2180 if(ib == 0) {
2181 ox = x;
2182 base = new;
2183 }
2184 sl = utf8size(new.c);
2185 memcpy(buf+ib, new.c, sl);
2186 ib += sl;
2187 ++ic;
2188 }
2189 }
2190 if(ib > 0)
2191 xdraws(buf, base, ox, y, ic, ib);
2192 }
2193 xdrawcursor();
2194 }
2195
2196 void
2197 expose(XEvent *ev) {
2198 XExposeEvent *e = &ev->xexpose;
2199 if(xw.state & WIN_REDRAW) {
2200 if(!e->count)
2201 xw.state &= ~WIN_REDRAW;
2202 }
2203 }
2204
2205 void
2206 visibility(XEvent *ev) {
2207 XVisibilityEvent *e = &ev->xvisibility;
2208 if(e->state == VisibilityFullyObscured)
2209 xw.state &= ~WIN_VISIBLE;
2210 else if(!(xw.state & WIN_VISIBLE))
2211 /* need a full redraw for next Expose, not just a buf copy */
2212 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2213 }
2214
2215 void
2216 unmap(XEvent *ev) {
2217 xw.state &= ~WIN_VISIBLE;
2218 }
2219
2220 void
2221 xseturgency(int add) {
2222 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2223 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2224 XSetWMHints(xw.dpy, xw.win, h);
2225 XFree(h);
2226 }
2227
2228 void
2229 focus(XEvent *ev) {
2230 if(ev->type == FocusIn) {
2231 xw.state |= WIN_FOCUSED;
2232 xseturgency(0);
2233 } else
2234 xw.state &= ~WIN_FOCUSED;
2235 }
2236
2237 char*
2238 kmap(KeySym k, uint state) {
2239 int i;
2240 state &= ~Mod2Mask;
2241 for(i = 0; i < LEN(key); i++) {
2242 uint mask = key[i].mask;
2243 if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
2244 return (char*)key[i].s;
2245 }
2246 return NULL;
2247 }
2248
2249 void
2250 kpress(XEvent *ev) {
2251 XKeyEvent *e = &ev->xkey;
2252 KeySym ksym;
2253 char buf[32];
2254 char *customkey;
2255 int len;
2256 int meta;
2257 int shift;
2258 Status status;
2259
2260 meta = e->state & Mod1Mask;
2261 shift = e->state & ShiftMask;
2262 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
2263
2264 /* 1. custom keys from config.h */
2265 if((customkey = kmap(ksym, e->state)))
2266 ttywrite(customkey, strlen(customkey));
2267 /* 2. hardcoded (overrides X lookup) */
2268 else
2269 switch(ksym) {
2270 case XK_Up:
2271 case XK_Down:
2272 case XK_Left:
2273 case XK_Right:
2274 /* XXX: shift up/down doesn't work */
2275 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
2276 ttywrite(buf, 3);
2277 break;
2278 case XK_Insert:
2279 if(shift)
2280 selpaste();
2281 break;
2282 case XK_Return:
2283 if(IS_SET(MODE_CRLF))
2284 ttywrite("\r\n", 2);
2285 else
2286 ttywrite("\r", 1);
2287 break;
2288 /* 3. X lookup */
2289 default:
2290 if(len > 0) {
2291 if(meta && len == 1)
2292 ttywrite("\033", 1);
2293 ttywrite(buf, len);
2294 }
2295 break;
2296 }
2297 }
2298
2299 void
2300 cmessage(XEvent *e) {
2301 /* See xembed specs
2302 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2303 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2304 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2305 xw.state |= WIN_FOCUSED;
2306 xseturgency(0);
2307 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2308 xw.state &= ~WIN_FOCUSED;
2309 }
2310 }
2311 }
2312
2313 void
2314 resize(XEvent *e) {
2315 int col, row;
2316
2317 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2318 return;
2319
2320 xw.w = e->xconfigure.width;
2321 xw.h = e->xconfigure.height;
2322 col = (xw.w - 2*BORDER) / xw.cw;
2323 row = (xw.h - 2*BORDER) / xw.ch;
2324 if(col == term.col && row == term.row)
2325 return;
2326
2327 xclear(0, 0, xw.w, xw.h);
2328 tresize(col, row);
2329 xresize(col, row);
2330 ttyresize();
2331 }
2332
2333 void
2334 run(void) {
2335 XEvent ev;
2336 fd_set rfd;
2337 int xfd = XConnectionNumber(xw.dpy), i;
2338 struct timeval drawtimeout, *tv = NULL;
2339
2340 for(i = 0;; i++) {
2341 FD_ZERO(&rfd);
2342 FD_SET(cmdfd, &rfd);
2343 FD_SET(xfd, &rfd);
2344 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
2345 if(errno == EINTR)
2346 continue;
2347 die("select failed: %s\n", SERRNO);
2348 }
2349
2350 /*
2351 * Stop after a certain number of reads so the user does not
2352 * feel like the system is stuttering.
2353 */
2354 if(i < 1000 && FD_ISSET(cmdfd, &rfd)) {
2355 ttyread();
2356
2357 /*
2358 * Just wait a bit so it isn't disturbing the
2359 * user and the system is able to write something.
2360 */
2361 drawtimeout.tv_sec = 0;
2362 drawtimeout.tv_usec = 5;
2363 tv = &drawtimeout;
2364 continue;
2365 }
2366 i = 0;
2367 tv = NULL;
2368
2369 while(XPending(xw.dpy)) {
2370 XNextEvent(xw.dpy, &ev);
2371 if(XFilterEvent(&ev, xw.win))
2372 continue;
2373 if(handler[ev.type])
2374 (handler[ev.type])(&ev);
2375 }
2376
2377 draw();
2378 XFlush(xw.dpy);
2379 }
2380 }
2381
2382 int
2383 main(int argc, char *argv[]) {
2384 int i, bitm, xr, yr;
2385 uint wr, hr;
2386
2387 xw.fw = xw.fh = xw.fx = xw.fy = 0;
2388 xw.isfixed = False;
2389
2390 for(i = 1; i < argc; i++) {
2391 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2392 case 't':
2393 if(++i < argc) opt_title = argv[i];
2394 break;
2395 case 'c':
2396 if(++i < argc) opt_class = argv[i];
2397 break;
2398 case 'w':
2399 if(++i < argc) opt_embed = argv[i];
2400 break;
2401 case 'f':
2402 if(++i < argc) opt_io = argv[i];
2403 break;
2404 case 'e':
2405 /* eat every remaining arguments */
2406 if(++i < argc) opt_cmd = &argv[i];
2407 goto run;
2408 case 'g':
2409 if(++i >= argc)
2410 break;
2411
2412 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
2413 if(bitm & XValue)
2414 xw.fx = xr;
2415 if(bitm & YValue)
2416 xw.fy = yr;
2417 if(bitm & WidthValue)
2418 xw.fw = (int)wr;
2419 if(bitm & HeightValue)
2420 xw.fh = (int)hr;
2421 if(bitm & XNegative && xw.fx == 0)
2422 xw.fx = -1;
2423 if(bitm & XNegative && xw.fy == 0)
2424 xw.fy = -1;
2425
2426 if(xw.fh != 0 && xw.fw != 0)
2427 xw.isfixed = True;
2428 break;
2429 case 'v':
2430 default:
2431 die(USAGE);
2432 }
2433 }
2434
2435 run:
2436 setlocale(LC_CTYPE, "");
2437 xinit();
2438 tnew(80, 24);
2439 ttynew();
2440 selinit();
2441 run();
2442 return 0;
2443 }
2444