Xinqi Bao's Git

projects / st.git / blob


89c59b4145f9fdebe5b523c6129188fc0645a2ee
[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #define _XOPEN_SOURCE 600
3 #include <ctype.h>
4 #include <errno.h>
5 #include <fcntl.h>
6 #include <limits.h>
7 #include <locale.h>
8 #include <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <sys/ioctl.h>
15 #include <sys/select.h>
16 #include <sys/stat.h>
17 #include <sys/time.h>
18 #include <sys/types.h>
19 #include <sys/wait.h>
20 #include <time.h>
21 #include <unistd.h>
22 #include <X11/Xatom.h>
23 #include <X11/Xlib.h>
24 #include <X11/Xutil.h>
25 #include <X11/cursorfont.h>
26 #include <X11/keysym.h>
27 #include <X11/extensions/Xdbe.h>
28
29 #if defined(__linux)
30 #include <pty.h>
31 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
32 #include <util.h>
33 #elif defined(__FreeBSD__) || defined(__DragonFly__)
34 #include <libutil.h>
35 #endif
36
37 #define USAGE \
38 "st " VERSION " (c) 2010-2012 st engineers\n" \
39 "usage: st [-t title] [-c class] [-g geometry]" \
40 " [-w windowid] [-v] [-f file] [-e command...]\n"
41
42 /* XEMBED messages */
43 #define XEMBED_FOCUS_IN 4
44 #define XEMBED_FOCUS_OUT 5
45
46 /* Arbitrary sizes */
47 #define ESC_BUF_SIZ 256
48 #define ESC_ARG_SIZ 16
49 #define STR_BUF_SIZ 256
50 #define STR_ARG_SIZ 16
51 #define DRAW_BUF_SIZ 20*1024
52 #define UTF_SIZ 4
53 #define XK_NO_MOD UINT_MAX
54 #define XK_ANY_MOD 0
55
56 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
57
58 #define SERRNO strerror(errno)
59 #define MIN(a, b) ((a) < (b) ? (a) : (b))
60 #define MAX(a, b) ((a) < (b) ? (b) : (a))
61 #define LEN(a) (sizeof(a) / sizeof(a[0]))
62 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
63 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
64 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
65 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
66 #define IS_SET(flag) (term.mode & (flag))
67 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
68 #define X2COL(x) (((x) - BORDER)/xw.cw)
69 #define Y2ROW(y) (((y) - BORDER)/xw.ch)
70
71 enum glyph_attribute {
72 ATTR_NULL = 0,
73 ATTR_REVERSE = 1,
74 ATTR_UNDERLINE = 2,
75 ATTR_BOLD = 4,
76 ATTR_GFX = 8,
77 ATTR_ITALIC = 16,
78 ATTR_BLINK = 32,
79 };
80
81 enum cursor_movement {
82 CURSOR_UP,
83 CURSOR_DOWN,
84 CURSOR_LEFT,
85 CURSOR_RIGHT,
86 CURSOR_SAVE,
87 CURSOR_LOAD
88 };
89
90 enum cursor_state {
91 CURSOR_DEFAULT = 0,
92 CURSOR_HIDE = 1,
93 CURSOR_WRAPNEXT = 2
94 };
95
96 enum glyph_state {
97 GLYPH_SET = 1,
98 GLYPH_DIRTY = 2
99 };
100
101 enum term_mode {
102 MODE_WRAP = 1,
103 MODE_INSERT = 2,
104 MODE_APPKEYPAD = 4,
105 MODE_ALTSCREEN = 8,
106 MODE_CRLF = 16,
107 MODE_MOUSEBTN = 32,
108 MODE_MOUSEMOTION = 64,
109 MODE_MOUSE = 32|64,
110 MODE_REVERSE = 128
111 };
112
113 enum escape_state {
114 ESC_START = 1,
115 ESC_CSI = 2,
116 ESC_STR = 4, /* DSC, OSC, PM, APC */
117 ESC_ALTCHARSET = 8,
118 ESC_STR_END = 16, /* a final string was encountered */
119 };
120
121 enum window_state {
122 WIN_VISIBLE = 1,
123 WIN_REDRAW = 2,
124 WIN_FOCUSED = 4
125 };
126
127 /* bit macro */
128 #undef B0
129 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
130
131 typedef unsigned char uchar;
132 typedef unsigned int uint;
133 typedef unsigned long ulong;
134 typedef unsigned short ushort;
135
136 typedef struct {
137 char c[UTF_SIZ]; /* character code */
138 uchar mode; /* attribute flags */
139 ushort fg; /* foreground */
140 ushort bg; /* background */
141 uchar state; /* state flags */
142 } Glyph;
143
144 typedef Glyph* Line;
145
146 typedef struct {
147 Glyph attr; /* current char attributes */
148 int x;
149 int y;
150 char state;
151 } TCursor;
152
153 /* CSI Escape sequence structs */
154 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
155 typedef struct {
156 char buf[ESC_BUF_SIZ]; /* raw string */
157 int len; /* raw string length */
158 char priv;
159 int arg[ESC_ARG_SIZ];
160 int narg; /* nb of args */
161 char mode;
162 } CSIEscape;
163
164 /* STR Escape sequence structs */
165 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
166 typedef struct {
167 char type; /* ESC type ... */
168 char buf[STR_BUF_SIZ]; /* raw string */
169 int len; /* raw string length */
170 char *args[STR_ARG_SIZ];
171 int narg; /* nb of args */
172 } STREscape;
173
174 /* Internal representation of the screen */
175 typedef struct {
176 int row; /* nb row */
177 int col; /* nb col */
178 Line* line; /* screen */
179 Line* alt; /* alternate screen */
180 bool* dirty; /* dirtyness of lines */
181 TCursor c; /* cursor */
182 int top; /* top scroll limit */
183 int bot; /* bottom scroll limit */
184 int mode; /* terminal mode flags */
185 int esc; /* escape state flags */
186 bool *tabs;
187 } Term;
188
189 /* Purely graphic info */
190 typedef struct {
191 Display* dpy;
192 Colormap cmap;
193 Window win;
194 XdbeBackBuffer buf;
195 Atom xembed;
196 XIM xim;
197 XIC xic;
198 int scr;
199 Bool isfixed; /* is fixed geometry? */
200 int fx, fy, fw, fh; /* fixed geometry */
201 int tw, th; /* tty width and height */
202 int w; /* window width */
203 int h; /* window height */
204 int ch; /* char height */
205 int cw; /* char width */
206 char state; /* focus, redraw, visible */
207 } XWindow;
208
209 typedef struct {
210 KeySym k;
211 uint mask;
212 char s[ESC_BUF_SIZ];
213 } Key;
214
215
216 /* TODO: use better name for vars... */
217 typedef struct {
218 int mode;
219 int bx, by;
220 int ex, ey;
221 struct {int x, y;} b, e;
222 char *clip;
223 Atom xtarget;
224 bool alt;
225 struct timeval tclick1;
226 struct timeval tclick2;
227 } Selection;
228
229 #include "config.h"
230
231 /* Drawing Context */
232 typedef struct {
233 ulong col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
234 GC gc;
235 struct {
236 int ascent;
237 int descent;
238 short lbearing;
239 short rbearing;
240 XFontSet set;
241 } font, bfont, ifont, ibfont;
242 } DC;
243
244 static void die(const char*, ...);
245 static void draw(void);
246 static void redraw(void);
247 static void drawregion(int, int, int, int);
248 static void execsh(void);
249 static void sigchld(int);
250 static void run(void);
251
252 static void csidump(void);
253 static void csihandle(void);
254 static void csiparse(void);
255 static void csireset(void);
256 static void strdump(void);
257 static void strhandle(void);
258 static void strparse(void);
259 static void strreset(void);
260
261 static void tclearregion(int, int, int, int);
262 static void tcursor(int);
263 static void tdeletechar(int);
264 static void tdeleteline(int);
265 static void tinsertblank(int);
266 static void tinsertblankline(int);
267 static void tmoveto(int, int);
268 static void tnew(int, int);
269 static void tnewline(int);
270 static void tputtab(bool);
271 static void tputc(char*);
272 static void treset(void);
273 static int tresize(int, int);
274 static void tscrollup(int, int);
275 static void tscrolldown(int, int);
276 static void tsetattr(int*, int);
277 static void tsetchar(char*);
278 static void tsetscroll(int, int);
279 static void tswapscreen(void);
280 static void tsetdirt(int, int);
281 static void tsetmode(bool, bool, int *, int);
282 static void tfulldirt(void);
283
284 static void ttynew(void);
285 static void ttyread(void);
286 static void ttyresize(int, int);
287 static void ttywrite(const char *, size_t);
288
289 static void xdraws(char *, Glyph, int, int, int, int);
290 static void xhints(void);
291 static void xclear(int, int, int, int);
292 static void xdrawcursor(void);
293 static void xinit(void);
294 static void xloadcols(void);
295 static void xresettitle(void);
296 static void xseturgency(int);
297 static void xsetsel(char*);
298 static void xresize(int, int);
299
300 static void expose(XEvent *);
301 static void visibility(XEvent *);
302 static void unmap(XEvent *);
303 static char* kmap(KeySym, uint);
304 static void kpress(XEvent *);
305 static void cmessage(XEvent *);
306 static void resize(XEvent *);
307 static void focus(XEvent *);
308 static void brelease(XEvent *);
309 static void bpress(XEvent *);
310 static void bmotion(XEvent *);
311 static void selnotify(XEvent *);
312 static void selclear(XEvent *);
313 static void selrequest(XEvent *);
314
315 static void selinit(void);
316 static inline bool selected(int, int);
317 static void selcopy(void);
318 static void selpaste(void);
319 static void selscroll(int, int);
320
321 static int utf8decode(char *, long *);
322 static int utf8encode(long *, char *);
323 static int utf8size(char *);
324 static int isfullutf8(char *, int);
325
326 static void *xmalloc(size_t);
327 static void *xrealloc(void *, size_t);
328 static void *xcalloc(size_t nmemb, size_t size);
329
330 static void (*handler[LASTEvent])(XEvent *) = {
331 [KeyPress] = kpress,
332 [ClientMessage] = cmessage,
333 [ConfigureNotify] = resize,
334 [VisibilityNotify] = visibility,
335 [UnmapNotify] = unmap,
336 [Expose] = expose,
337 [FocusIn] = focus,
338 [FocusOut] = focus,
339 [MotionNotify] = bmotion,
340 [ButtonPress] = bpress,
341 [ButtonRelease] = brelease,
342 [SelectionClear] = selclear,
343 [SelectionNotify] = selnotify,
344 [SelectionRequest] = selrequest,
345 };
346
347 /* Globals */
348 static DC dc;
349 static XWindow xw;
350 static Term term;
351 static CSIEscape csiescseq;
352 static STREscape strescseq;
353 static int cmdfd;
354 static pid_t pid;
355 static Selection sel;
356 static int iofd = -1;
357 static char **opt_cmd = NULL;
358 static char *opt_io = NULL;
359 static char *opt_title = NULL;
360 static char *opt_embed = NULL;
361 static char *opt_class = NULL;
362
363 void *
364 xmalloc(size_t len) {
365 void *p = malloc(len);
366 if(!p)
367 die("Out of memory\n");
368 return p;
369 }
370
371 void *
372 xrealloc(void *p, size_t len) {
373 if((p = realloc(p, len)) == NULL)
374 die("Out of memory\n");
375 return p;
376 }
377
378 void *
379 xcalloc(size_t nmemb, size_t size) {
380 void *p = calloc(nmemb, size);
381 if(!p)
382 die("Out of memory\n");
383 return p;
384 }
385
386 int
387 utf8decode(char *s, long *u) {
388 uchar c;
389 int i, n, rtn;
390
391 rtn = 1;
392 c = *s;
393 if(~c & B7) { /* 0xxxxxxx */
394 *u = c;
395 return rtn;
396 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
397 *u = c&(B4|B3|B2|B1|B0);
398 n = 1;
399 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
400 *u = c&(B3|B2|B1|B0);
401 n = 2;
402 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
403 *u = c & (B2|B1|B0);
404 n = 3;
405 } else
406 goto invalid;
407 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
408 c = *s;
409 if((c & (B7|B6)) != B7) /* 10xxxxxx */
410 goto invalid;
411 *u <<= 6;
412 *u |= c & (B5|B4|B3|B2|B1|B0);
413 }
414 if((n == 1 && *u < 0x80) ||
415 (n == 2 && *u < 0x800) ||
416 (n == 3 && *u < 0x10000) ||
417 (*u >= 0xD800 && *u <= 0xDFFF))
418 goto invalid;
419 return rtn;
420 invalid:
421 *u = 0xFFFD;
422 return rtn;
423 }
424
425 int
426 utf8encode(long *u, char *s) {
427 uchar *sp;
428 ulong uc;
429 int i, n;
430
431 sp = (uchar*) s;
432 uc = *u;
433 if(uc < 0x80) {
434 *sp = uc; /* 0xxxxxxx */
435 return 1;
436 } else if(*u < 0x800) {
437 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
438 n = 1;
439 } else if(uc < 0x10000) {
440 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
441 n = 2;
442 } else if(uc <= 0x10FFFF) {
443 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
444 n = 3;
445 } else {
446 goto invalid;
447 }
448 for(i=n,++sp; i>0; --i,++sp)
449 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
450 return n+1;
451 invalid:
452 /* U+FFFD */
453 *s++ = '\xEF';
454 *s++ = '\xBF';
455 *s = '\xBD';
456 return 3;
457 }
458
459 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
460 UTF-8 otherwise return 0 */
461 int
462 isfullutf8(char *s, int b) {
463 uchar *c1, *c2, *c3;
464
465 c1 = (uchar *) s;
466 c2 = (uchar *) ++s;
467 c3 = (uchar *) ++s;
468 if(b < 1)
469 return 0;
470 else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
471 return 0;
472 else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
473 ((b == 1) ||
474 ((b == 2) && (*c2&(B7|B6)) == B7)))
475 return 0;
476 else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
477 ((b == 1) ||
478 ((b == 2) && (*c2&(B7|B6)) == B7) ||
479 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7)))
480 return 0;
481 else
482 return 1;
483 }
484
485 int
486 utf8size(char *s) {
487 uchar c = *s;
488
489 if(~c&B7)
490 return 1;
491 else if((c&(B7|B6|B5)) == (B7|B6))
492 return 2;
493 else if((c&(B7|B6|B5|B4)) == (B7|B6|B5))
494 return 3;
495 else
496 return 4;
497 }
498
499 void
500 selinit(void) {
501 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
502 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
503 sel.mode = 0;
504 sel.bx = -1;
505 sel.clip = NULL;
506 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
507 if(sel.xtarget == None)
508 sel.xtarget = XA_STRING;
509 }
510
511 static inline bool
512 selected(int x, int y) {
513 if(sel.ey == y && sel.by == y) {
514 int bx = MIN(sel.bx, sel.ex);
515 int ex = MAX(sel.bx, sel.ex);
516 return BETWEEN(x, bx, ex);
517 }
518 return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
519 || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
520 }
521
522 void
523 getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
524 if(b)
525 *b = e->xbutton.button;
526
527 *x = X2COL(e->xbutton.x);
528 *y = Y2ROW(e->xbutton.y);
529 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
530 sel.b.y = MIN(sel.by, sel.ey);
531 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
532 sel.e.y = MAX(sel.by, sel.ey);
533 }
534
535 void
536 mousereport(XEvent *e) {
537 int x = X2COL(e->xbutton.x);
538 int y = Y2ROW(e->xbutton.y);
539 int button = e->xbutton.button;
540 int state = e->xbutton.state;
541 char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
542 static int ob, ox, oy;
543
544 /* from urxvt */
545 if(e->xbutton.type == MotionNotify) {
546 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
547 return;
548 button = ob + 32;
549 ox = x, oy = y;
550 } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
551 button = 3;
552 } else {
553 button -= Button1;
554 if(button >= 3)
555 button += 64 - 3;
556 if(e->xbutton.type == ButtonPress) {
557 ob = button;
558 ox = x, oy = y;
559 }
560 }
561
562 buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
563 + (state & Mod4Mask ? 8 : 0)
564 + (state & ControlMask ? 16 : 0);
565
566 ttywrite(buf, sizeof(buf));
567 }
568
569 void
570 bpress(XEvent *e) {
571 if(IS_SET(MODE_MOUSE))
572 mousereport(e);
573 else if(e->xbutton.button == Button1) {
574 if(sel.bx != -1) {
575 sel.bx = -1;
576 tsetdirt(sel.b.y, sel.e.y);
577 draw();
578 }
579 sel.mode = 1;
580 sel.ex = sel.bx = X2COL(e->xbutton.x);
581 sel.ey = sel.by = Y2ROW(e->xbutton.y);
582 }
583 }
584
585 void
586 selcopy(void) {
587 char *str, *ptr;
588 int x, y, bufsize, is_selected = 0;
589
590 if(sel.bx == -1)
591 str = NULL;
592
593 else {
594 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
595 ptr = str = xmalloc(bufsize);
596
597 /* append every set & selected glyph to the selection */
598 for(y = 0; y < term.row; y++) {
599 for(x = 0; x < term.col; x++) {
600 int size;
601 char *p;
602 Glyph *gp = &term.line[y][x];
603
604 if(!(is_selected = selected(x, y)))
605 continue;
606 p = (gp->state & GLYPH_SET) ? gp->c : " ";
607 size = utf8size(p);
608 memcpy(ptr, p, size);
609 ptr += size;
610 }
611 /* \n at the end of every selected line except for the last one */
612 if(is_selected && y < sel.e.y)
613 *ptr++ = '\n';
614 }
615 *ptr = 0;
616 }
617 sel.alt = IS_SET(MODE_ALTSCREEN);
618 xsetsel(str);
619 }
620
621 void
622 selnotify(XEvent *e) {
623 ulong nitems, ofs, rem;
624 int format;
625 uchar *data;
626 Atom type;
627
628 ofs = 0;
629 do {
630 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
631 False, AnyPropertyType, &type, &format,
632 &nitems, &rem, &data)) {
633 fprintf(stderr, "Clipboard allocation failed\n");
634 return;
635 }
636 ttywrite((const char *) data, nitems * format / 8);
637 XFree(data);
638 /* number of 32-bit chunks returned */
639 ofs += nitems * format / 32;
640 } while(rem > 0);
641 }
642
643 void
644 selpaste() {
645 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY, xw.win, CurrentTime);
646 }
647
648 void selclear(XEvent *e) {
649 if(sel.bx == -1)
650 return;
651 sel.bx = -1;
652 tsetdirt(sel.b.y, sel.e.y);
653 }
654
655 void
656 selrequest(XEvent *e) {
657 XSelectionRequestEvent *xsre;
658 XSelectionEvent xev;
659 Atom xa_targets;
660
661 xsre = (XSelectionRequestEvent *) e;
662 xev.type = SelectionNotify;
663 xev.requestor = xsre->requestor;
664 xev.selection = xsre->selection;
665 xev.target = xsre->target;
666 xev.time = xsre->time;
667 /* reject */
668 xev.property = None;
669
670 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
671 if(xsre->target == xa_targets) {
672 /* respond with the supported type */
673 Atom string = sel.xtarget;
674 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
675 XA_ATOM, 32, PropModeReplace,
676 (uchar *) &string, 1);
677 xev.property = xsre->property;
678 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
679 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
680 xsre->target, 8, PropModeReplace,
681 (uchar *) sel.clip, strlen(sel.clip));
682 xev.property = xsre->property;
683 }
684
685 /* all done, send a notification to the listener */
686 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
687 fprintf(stderr, "Error sending SelectionNotify event\n");
688 }
689
690 void
691 xsetsel(char *str) {
692 /* register the selection for both the clipboard and the primary */
693 Atom clipboard;
694
695 free(sel.clip);
696 sel.clip = str;
697
698 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
699
700 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
701 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
702 }
703
704 void
705 brelease(XEvent *e) {
706 if(IS_SET(MODE_MOUSE)) {
707 mousereport(e);
708 return;
709 }
710 if(e->xbutton.button == Button2)
711 selpaste();
712 else if(e->xbutton.button == Button1) {
713 sel.mode = 0;
714 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
715 term.dirty[sel.ey] = 1;
716 if(sel.bx == sel.ex && sel.by == sel.ey) {
717 struct timeval now;
718 sel.bx = -1;
719 gettimeofday(&now, NULL);
720
721 if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
722 /* triple click on the line */
723 sel.b.x = sel.bx = 0;
724 sel.e.x = sel.ex = term.col;
725 sel.b.y = sel.e.y = sel.ey;
726 selcopy();
727 } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
728 /* double click to select word */
729 sel.bx = sel.ex;
730 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
731 term.line[sel.ey][sel.bx-1].c[0] != ' ') sel.bx--;
732 sel.b.x = sel.bx;
733 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
734 term.line[sel.ey][sel.ex+1].c[0] != ' ') sel.ex++;
735 sel.e.x = sel.ex;
736 sel.b.y = sel.e.y = sel.ey;
737 selcopy();
738 }
739 } else
740 selcopy();
741 }
742 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
743 gettimeofday(&sel.tclick1, NULL);
744 }
745
746 void
747 bmotion(XEvent *e) {
748 if(IS_SET(MODE_MOUSE)) {
749 mousereport(e);
750 return;
751 }
752 if(sel.mode) {
753 int oldey = sel.ey, oldex = sel.ex;
754 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
755
756 if(oldey != sel.ey || oldex != sel.ex) {
757 int starty = MIN(oldey, sel.ey);
758 int endy = MAX(oldey, sel.ey);
759 tsetdirt(starty, endy);
760 }
761 }
762 }
763
764 void
765 die(const char *errstr, ...) {
766 va_list ap;
767
768 va_start(ap, errstr);
769 vfprintf(stderr, errstr, ap);
770 va_end(ap);
771 exit(EXIT_FAILURE);
772 }
773
774 void
775 execsh(void) {
776 char **args;
777 char *envshell = getenv("SHELL");
778
779 unsetenv("COLUMNS");
780 unsetenv("LINES");
781 unsetenv("TERMCAP");
782
783 signal(SIGCHLD, SIG_DFL);
784 signal(SIGHUP, SIG_DFL);
785 signal(SIGINT, SIG_DFL);
786 signal(SIGQUIT, SIG_DFL);
787 signal(SIGTERM, SIG_DFL);
788 signal(SIGALRM, SIG_DFL);
789
790 DEFAULT(envshell, SHELL);
791 putenv("TERM="TNAME);
792 args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
793 execvp(args[0], args);
794 exit(EXIT_FAILURE);
795 }
796
797 void
798 sigchld(int a) {
799 int stat = 0;
800 if(waitpid(pid, &stat, 0) < 0)
801 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
802 if(WIFEXITED(stat))
803 exit(WEXITSTATUS(stat));
804 else
805 exit(EXIT_FAILURE);
806 }
807
808 void
809 ttynew(void) {
810 int m, s;
811
812 /* seems to work fine on linux, openbsd and freebsd */
813 struct winsize w = {term.row, term.col, 0, 0};
814 if(openpty(&m, &s, NULL, NULL, &w) < 0)
815 die("openpty failed: %s\n", SERRNO);
816
817 switch(pid = fork()) {
818 case -1:
819 die("fork failed\n");
820 break;
821 case 0:
822 setsid(); /* create a new process group */
823 dup2(s, STDIN_FILENO);
824 dup2(s, STDOUT_FILENO);
825 dup2(s, STDERR_FILENO);
826 if(ioctl(s, TIOCSCTTY, NULL) < 0)
827 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
828 close(s);
829 close(m);
830 execsh();
831 break;
832 default:
833 close(s);
834 cmdfd = m;
835 signal(SIGCHLD, sigchld);
836 if(opt_io) {
837 if(!strcmp(opt_io, "-")) {
838 iofd = STDOUT_FILENO;
839 } else {
840 if((iofd = open(opt_io, O_WRONLY | O_CREAT, 0666)) < 0) {
841 fprintf(stderr, "Error opening %s:%s\n",
842 opt_io, strerror(errno));
843 }
844 }
845 }
846 }
847 }
848
849 void
850 dump(char c) {
851 static int col;
852 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
853 if(++col % 10 == 0)
854 fprintf(stderr, "\n");
855 }
856
857 void
858 ttyread(void) {
859 static char buf[BUFSIZ];
860 static int buflen = 0;
861 char *ptr;
862 char s[UTF_SIZ];
863 int charsize; /* size of utf8 char in bytes */
864 long utf8c;
865 int ret;
866
867 /* append read bytes to unprocessed bytes */
868 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
869 die("Couldn't read from shell: %s\n", SERRNO);
870
871 /* process every complete utf8 char */
872 buflen += ret;
873 ptr = buf;
874 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
875 charsize = utf8decode(ptr, &utf8c);
876 utf8encode(&utf8c, s);
877 tputc(s);
878 ptr += charsize;
879 buflen -= charsize;
880 }
881
882 /* keep any uncomplete utf8 char for the next call */
883 memmove(buf, ptr, buflen);
884 }
885
886 void
887 ttywrite(const char *s, size_t n) {
888 if(write(cmdfd, s, n) == -1)
889 die("write error on tty: %s\n", SERRNO);
890 }
891
892 void
893 ttyresize(int x, int y) {
894 struct winsize w;
895
896 w.ws_row = term.row;
897 w.ws_col = term.col;
898 w.ws_xpixel = xw.tw;
899 w.ws_ypixel = xw.th;
900 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
901 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
902 }
903
904 void
905 tsetdirt(int top, int bot)
906 {
907 int i;
908
909 LIMIT(top, 0, term.row-1);
910 LIMIT(bot, 0, term.row-1);
911
912 for(i = top; i <= bot; i++)
913 term.dirty[i] = 1;
914 }
915
916 void
917 tfulldirt(void)
918 {
919 tsetdirt(0, term.row-1);
920 }
921
922 void
923 tcursor(int mode) {
924 static TCursor c;
925
926 if(mode == CURSOR_SAVE)
927 c = term.c;
928 else if(mode == CURSOR_LOAD)
929 term.c = c, tmoveto(c.x, c.y);
930 }
931
932 void
933 treset(void) {
934 unsigned i;
935 term.c = (TCursor){{
936 .mode = ATTR_NULL,
937 .fg = DefaultFG,
938 .bg = DefaultBG
939 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
940
941 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
942 for(i = TAB; i < term.col; i += TAB)
943 term.tabs[i] = 1;
944 term.top = 0, term.bot = term.row - 1;
945 term.mode = MODE_WRAP;
946 tclearregion(0, 0, term.col-1, term.row-1);
947 }
948
949 void
950 tnew(int col, int row) {
951 /* set screen size */
952 term.row = row, term.col = col;
953 term.line = xmalloc(term.row * sizeof(Line));
954 term.alt = xmalloc(term.row * sizeof(Line));
955 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
956 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
957
958 for(row = 0; row < term.row; row++) {
959 term.line[row] = xmalloc(term.col * sizeof(Glyph));
960 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
961 term.dirty[row] = 0;
962 }
963 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
964 /* setup screen */
965 treset();
966 }
967
968 void
969 tswapscreen(void) {
970 Line* tmp = term.line;
971 term.line = term.alt;
972 term.alt = tmp;
973 term.mode ^= MODE_ALTSCREEN;
974 tfulldirt();
975 }
976
977 void
978 tscrolldown(int orig, int n) {
979 int i;
980 Line temp;
981
982 LIMIT(n, 0, term.bot-orig+1);
983
984 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
985
986 for(i = term.bot; i >= orig+n; i--) {
987 temp = term.line[i];
988 term.line[i] = term.line[i-n];
989 term.line[i-n] = temp;
990
991 term.dirty[i] = 1;
992 term.dirty[i-n] = 1;
993 }
994
995 selscroll(orig, n);
996 }
997
998 void
999 tscrollup(int orig, int n) {
1000 int i;
1001 Line temp;
1002 LIMIT(n, 0, term.bot-orig+1);
1003
1004 tclearregion(0, orig, term.col-1, orig+n-1);
1005
1006 for(i = orig; i <= term.bot-n; i++) {
1007 temp = term.line[i];
1008 term.line[i] = term.line[i+n];
1009 term.line[i+n] = temp;
1010
1011 term.dirty[i] = 1;
1012 term.dirty[i+n] = 1;
1013 }
1014
1015 selscroll(orig, -n);
1016 }
1017
1018 void
1019 selscroll(int orig, int n) {
1020 if(sel.bx == -1)
1021 return;
1022
1023 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1024 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1025 sel.bx = -1;
1026 return;
1027 }
1028 if(sel.by < term.top) {
1029 sel.by = term.top;
1030 sel.bx = 0;
1031 }
1032 if(sel.ey > term.bot) {
1033 sel.ey = term.bot;
1034 sel.ex = term.col;
1035 }
1036 sel.b.y = sel.by, sel.b.x = sel.bx;
1037 sel.e.y = sel.ey, sel.e.x = sel.ex;
1038 }
1039 }
1040
1041 void
1042 tnewline(int first_col) {
1043 int y = term.c.y;
1044 if(y == term.bot)
1045 tscrollup(term.top, 1);
1046 else
1047 y++;
1048 tmoveto(first_col ? 0 : term.c.x, y);
1049 }
1050
1051 void
1052 csiparse(void) {
1053 /* int noarg = 1; */
1054 char *p = csiescseq.buf;
1055
1056 csiescseq.narg = 0;
1057 if(*p == '?')
1058 csiescseq.priv = 1, p++;
1059
1060 while(p < csiescseq.buf+csiescseq.len) {
1061 while(isdigit(*p)) {
1062 csiescseq.arg[csiescseq.narg] *= 10;
1063 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1064 }
1065 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ)
1066 csiescseq.narg++, p++;
1067 else {
1068 csiescseq.mode = *p;
1069 csiescseq.narg++;
1070 return;
1071 }
1072 }
1073 }
1074
1075 void
1076 tmoveto(int x, int y) {
1077 LIMIT(x, 0, term.col-1);
1078 LIMIT(y, 0, term.row-1);
1079 term.c.state &= ~CURSOR_WRAPNEXT;
1080 term.c.x = x;
1081 term.c.y = y;
1082 }
1083
1084 void
1085 tsetchar(char *c) {
1086 term.dirty[term.c.y] = 1;
1087 term.line[term.c.y][term.c.x] = term.c.attr;
1088 memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
1089 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
1090 }
1091
1092 void
1093 tclearregion(int x1, int y1, int x2, int y2) {
1094 int x, y, temp;
1095
1096 if(x1 > x2)
1097 temp = x1, x1 = x2, x2 = temp;
1098 if(y1 > y2)
1099 temp = y1, y1 = y2, y2 = temp;
1100
1101 LIMIT(x1, 0, term.col-1);
1102 LIMIT(x2, 0, term.col-1);
1103 LIMIT(y1, 0, term.row-1);
1104 LIMIT(y2, 0, term.row-1);
1105
1106 for(y = y1; y <= y2; y++) {
1107 term.dirty[y] = 1;
1108 for(x = x1; x <= x2; x++)
1109 term.line[y][x].state = 0;
1110 }
1111 }
1112
1113 void
1114 tdeletechar(int n) {
1115 int src = term.c.x + n;
1116 int dst = term.c.x;
1117 int size = term.col - src;
1118
1119 term.dirty[term.c.y] = 1;
1120
1121 if(src >= term.col) {
1122 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1123 return;
1124 }
1125 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1126 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1127 }
1128
1129 void
1130 tinsertblank(int n) {
1131 int src = term.c.x;
1132 int dst = src + n;
1133 int size = term.col - dst;
1134
1135 term.dirty[term.c.y] = 1;
1136
1137 if(dst >= term.col) {
1138 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1139 return;
1140 }
1141 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1142 tclearregion(src, term.c.y, dst - 1, term.c.y);
1143 }
1144
1145 void
1146 tinsertblankline(int n) {
1147 if(term.c.y < term.top || term.c.y > term.bot)
1148 return;
1149
1150 tscrolldown(term.c.y, n);
1151 }
1152
1153 void
1154 tdeleteline(int n) {
1155 if(term.c.y < term.top || term.c.y > term.bot)
1156 return;
1157
1158 tscrollup(term.c.y, n);
1159 }
1160
1161 void
1162 tsetattr(int *attr, int l) {
1163 int i;
1164
1165 for(i = 0; i < l; i++) {
1166 switch(attr[i]) {
1167 case 0:
1168 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1169 | ATTR_ITALIC | ATTR_BLINK);
1170 term.c.attr.fg = DefaultFG;
1171 term.c.attr.bg = DefaultBG;
1172 break;
1173 case 1:
1174 term.c.attr.mode |= ATTR_BOLD;
1175 break;
1176 case 3: /* enter standout (highlight) */
1177 term.c.attr.mode |= ATTR_ITALIC;
1178 break;
1179 case 4:
1180 term.c.attr.mode |= ATTR_UNDERLINE;
1181 break;
1182 case 5:
1183 term.c.attr.mode |= ATTR_BLINK;
1184 break;
1185 case 7:
1186 term.c.attr.mode |= ATTR_REVERSE;
1187 break;
1188 case 21:
1189 case 22:
1190 term.c.attr.mode &= ~ATTR_BOLD;
1191 break;
1192 case 23: /* leave standout (highlight) mode */
1193 term.c.attr.mode &= ~ATTR_ITALIC;
1194 break;
1195 case 24:
1196 term.c.attr.mode &= ~ATTR_UNDERLINE;
1197 break;
1198 case 25:
1199 term.c.attr.mode &= ~ATTR_BLINK;
1200 break;
1201 case 27:
1202 term.c.attr.mode &= ~ATTR_REVERSE;
1203 break;
1204 case 38:
1205 if(i + 2 < l && attr[i + 1] == 5) {
1206 i += 2;
1207 if(BETWEEN(attr[i], 0, 255))
1208 term.c.attr.fg = attr[i];
1209 else
1210 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
1211 }
1212 else
1213 fprintf(stderr, "erresc(38): gfx attr %d unknown\n", attr[i]);
1214 break;
1215 case 39:
1216 term.c.attr.fg = DefaultFG;
1217 break;
1218 case 48:
1219 if(i + 2 < l && attr[i + 1] == 5) {
1220 i += 2;
1221 if(BETWEEN(attr[i], 0, 255))
1222 term.c.attr.bg = attr[i];
1223 else
1224 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
1225 }
1226 else
1227 fprintf(stderr, "erresc(48): gfx attr %d unknown\n", attr[i]);
1228 break;
1229 case 49:
1230 term.c.attr.bg = DefaultBG;
1231 break;
1232 default:
1233 if(BETWEEN(attr[i], 30, 37))
1234 term.c.attr.fg = attr[i] - 30;
1235 else if(BETWEEN(attr[i], 40, 47))
1236 term.c.attr.bg = attr[i] - 40;
1237 else if(BETWEEN(attr[i], 90, 97))
1238 term.c.attr.fg = attr[i] - 90 + 8;
1239 else if(BETWEEN(attr[i], 100, 107))
1240 term.c.attr.bg = attr[i] - 100 + 8;
1241 else
1242 fprintf(stderr, "erresc(default): gfx attr %d unknown\n", attr[i]), csidump();
1243 break;
1244 }
1245 }
1246 }
1247
1248 void
1249 tsetscroll(int t, int b) {
1250 int temp;
1251
1252 LIMIT(t, 0, term.row-1);
1253 LIMIT(b, 0, term.row-1);
1254 if(t > b) {
1255 temp = t;
1256 t = b;
1257 b = temp;
1258 }
1259 term.top = t;
1260 term.bot = b;
1261 }
1262
1263 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1264
1265 void
1266 tsetmode(bool priv, bool set, int *args, int narg) {
1267 int *lim, mode;
1268
1269 for(lim = args + narg; args < lim; ++args) {
1270 if(priv) {
1271 switch(*args) {
1272 case 1:
1273 MODBIT(term.mode, set, MODE_APPKEYPAD);
1274 break;
1275 case 5: /* DECSCNM -- Reverve video */
1276 mode = term.mode;
1277 MODBIT(term.mode,set, MODE_REVERSE);
1278 if(mode != term.mode)
1279 redraw();
1280 break;
1281 case 7:
1282 MODBIT(term.mode, set, MODE_WRAP);
1283 break;
1284 case 20:
1285 MODBIT(term.mode, set, MODE_CRLF);
1286 break;
1287 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1288 break;
1289 case 25:
1290 MODBIT(term.c.state, !set, CURSOR_HIDE);
1291 break;
1292 case 1000: /* 1000,1002: enable xterm mouse report */
1293 MODBIT(term.mode, set, MODE_MOUSEBTN);
1294 break;
1295 case 1002:
1296 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1297 break;
1298 case 1049: /* = 1047 and 1048 */
1299 case 47:
1300 case 1047:
1301 if(IS_SET(MODE_ALTSCREEN))
1302 tclearregion(0, 0, term.col-1, term.row-1);
1303 if((set && !IS_SET(MODE_ALTSCREEN)) ||
1304 (!set && IS_SET(MODE_ALTSCREEN))) {
1305 tswapscreen();
1306 }
1307 if(*args != 1049)
1308 break;
1309 /* pass through */
1310 case 1048:
1311 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1312 break;
1313 default:
1314 fprintf(stderr,
1315 "erresc: unknown private set/reset mode %d\n",
1316 *args);
1317 break;
1318 }
1319 } else {
1320 switch(*args) {
1321 case 4:
1322 MODBIT(term.mode, set, MODE_INSERT);
1323 break;
1324 default:
1325 fprintf(stderr,
1326 "erresc: unknown set/reset mode %d\n",
1327 *args);
1328 break;
1329 }
1330 }
1331 }
1332 }
1333 #undef MODBIT
1334
1335
1336 void
1337 csihandle(void) {
1338 switch(csiescseq.mode) {
1339 default:
1340 unknown:
1341 fprintf(stderr, "erresc: unknown csi ");
1342 csidump();
1343 /* die(""); */
1344 break;
1345 case '@': /* ICH -- Insert <n> blank char */
1346 DEFAULT(csiescseq.arg[0], 1);
1347 tinsertblank(csiescseq.arg[0]);
1348 break;
1349 case 'A': /* CUU -- Cursor <n> Up */
1350 case 'e':
1351 DEFAULT(csiescseq.arg[0], 1);
1352 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1353 break;
1354 case 'B': /* CUD -- Cursor <n> Down */
1355 DEFAULT(csiescseq.arg[0], 1);
1356 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1357 break;
1358 case 'C': /* CUF -- Cursor <n> Forward */
1359 case 'a':
1360 DEFAULT(csiescseq.arg[0], 1);
1361 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1362 break;
1363 case 'D': /* CUB -- Cursor <n> Backward */
1364 DEFAULT(csiescseq.arg[0], 1);
1365 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1366 break;
1367 case 'E': /* CNL -- Cursor <n> Down and first col */
1368 DEFAULT(csiescseq.arg[0], 1);
1369 tmoveto(0, term.c.y+csiescseq.arg[0]);
1370 break;
1371 case 'F': /* CPL -- Cursor <n> Up and first col */
1372 DEFAULT(csiescseq.arg[0], 1);
1373 tmoveto(0, term.c.y-csiescseq.arg[0]);
1374 break;
1375 case 'g': /* TBC -- Tabulation clear */
1376 switch (csiescseq.arg[0]) {
1377 case 0: /* clear current tab stop */
1378 term.tabs[term.c.x] = 0;
1379 break;
1380 case 3: /* clear all the tabs */
1381 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1382 break;
1383 default:
1384 goto unknown;
1385 }
1386 break;
1387 case 'G': /* CHA -- Move to <col> */
1388 case '`': /* HPA */
1389 DEFAULT(csiescseq.arg[0], 1);
1390 tmoveto(csiescseq.arg[0]-1, term.c.y);
1391 break;
1392 case 'H': /* CUP -- Move to <row> <col> */
1393 case 'f': /* HVP */
1394 DEFAULT(csiescseq.arg[0], 1);
1395 DEFAULT(csiescseq.arg[1], 1);
1396 tmoveto(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1397 break;
1398 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1399 DEFAULT(csiescseq.arg[0], 1);
1400 while(csiescseq.arg[0]--)
1401 tputtab(1);
1402 break;
1403 case 'J': /* ED -- Clear screen */
1404 sel.bx = -1;
1405 switch(csiescseq.arg[0]) {
1406 case 0: /* below */
1407 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1408 if(term.c.y < term.row-1)
1409 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1410 break;
1411 case 1: /* above */
1412 if(term.c.y > 1)
1413 tclearregion(0, 0, term.col-1, term.c.y-1);
1414 tclearregion(0, term.c.y, term.c.x, term.c.y);
1415 break;
1416 case 2: /* all */
1417 tclearregion(0, 0, term.col-1, term.row-1);
1418 break;
1419 default:
1420 goto unknown;
1421 }
1422 break;
1423 case 'K': /* EL -- Clear line */
1424 switch(csiescseq.arg[0]) {
1425 case 0: /* right */
1426 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1427 break;
1428 case 1: /* left */
1429 tclearregion(0, term.c.y, term.c.x, term.c.y);
1430 break;
1431 case 2: /* all */
1432 tclearregion(0, term.c.y, term.col-1, term.c.y);
1433 break;
1434 }
1435 break;
1436 case 'S': /* SU -- Scroll <n> line up */
1437 DEFAULT(csiescseq.arg[0], 1);
1438 tscrollup(term.top, csiescseq.arg[0]);
1439 break;
1440 case 'T': /* SD -- Scroll <n> line down */
1441 DEFAULT(csiescseq.arg[0], 1);
1442 tscrolldown(term.top, csiescseq.arg[0]);
1443 break;
1444 case 'L': /* IL -- Insert <n> blank lines */
1445 DEFAULT(csiescseq.arg[0], 1);
1446 tinsertblankline(csiescseq.arg[0]);
1447 break;
1448 case 'l': /* RM -- Reset Mode */
1449 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1450 break;
1451 case 'M': /* DL -- Delete <n> lines */
1452 DEFAULT(csiescseq.arg[0], 1);
1453 tdeleteline(csiescseq.arg[0]);
1454 break;
1455 case 'X': /* ECH -- Erase <n> char */
1456 DEFAULT(csiescseq.arg[0], 1);
1457 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
1458 break;
1459 case 'P': /* DCH -- Delete <n> char */
1460 DEFAULT(csiescseq.arg[0], 1);
1461 tdeletechar(csiescseq.arg[0]);
1462 break;
1463 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1464 DEFAULT(csiescseq.arg[0], 1);
1465 while(csiescseq.arg[0]--)
1466 tputtab(0);
1467 break;
1468 case 'd': /* VPA -- Move to <row> */
1469 DEFAULT(csiescseq.arg[0], 1);
1470 tmoveto(term.c.x, csiescseq.arg[0]-1);
1471 break;
1472 case 'h': /* SM -- Set terminal mode */
1473 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1474 break;
1475 case 'm': /* SGR -- Terminal attribute (color) */
1476 tsetattr(csiescseq.arg, csiescseq.narg);
1477 break;
1478 case 'r': /* DECSTBM -- Set Scrolling Region */
1479 if(csiescseq.priv)
1480 goto unknown;
1481 else {
1482 DEFAULT(csiescseq.arg[0], 1);
1483 DEFAULT(csiescseq.arg[1], term.row);
1484 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1485 tmoveto(0, 0);
1486 }
1487 break;
1488 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1489 tcursor(CURSOR_SAVE);
1490 break;
1491 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1492 tcursor(CURSOR_LOAD);
1493 break;
1494 }
1495 }
1496
1497 void
1498 csidump(void) {
1499 int i;
1500 printf("ESC[");
1501 for(i = 0; i < csiescseq.len; i++) {
1502 uint c = csiescseq.buf[i] & 0xff;
1503 if(isprint(c)) putchar(c);
1504 else if(c == '\n') printf("(\\n)");
1505 else if(c == '\r') printf("(\\r)");
1506 else if(c == 0x1b) printf("(\\e)");
1507 else printf("(%02x)", c);
1508 }
1509 putchar('\n');
1510 }
1511
1512 void
1513 csireset(void) {
1514 memset(&csiescseq, 0, sizeof(csiescseq));
1515 }
1516
1517 void
1518 strhandle(void) {
1519 char *p;
1520
1521 /*
1522 * TODO: make this being useful in case of color palette change.
1523 */
1524 strparse();
1525
1526 p = strescseq.buf;
1527
1528 switch(strescseq.type) {
1529 case ']': /* OSC -- Operating System Command */
1530 switch(p[0]) {
1531 case '0':
1532 case '1':
1533 case '2':
1534 /*
1535 * TODO: Handle special chars in string, like umlauts.
1536 */
1537 if(p[1] == ';') {
1538 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1539 }
1540 break;
1541 case ';':
1542 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1543 break;
1544 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1545 break;
1546 default:
1547 fprintf(stderr, "erresc: unknown str ");
1548 strdump();
1549 break;
1550 }
1551 break;
1552 case 'k': /* old title set compatibility */
1553 XStoreName(xw.dpy, xw.win, strescseq.buf);
1554 break;
1555 case 'P': /* DSC -- Device Control String */
1556 case '_': /* APC -- Application Program Command */
1557 case '^': /* PM -- Privacy Message */
1558 default:
1559 fprintf(stderr, "erresc: unknown str ");
1560 strdump();
1561 /* die(""); */
1562 break;
1563 }
1564 }
1565
1566 void
1567 strparse(void) {
1568 /*
1569 * TODO: Implement parsing like for CSI when required.
1570 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1571 */
1572 return;
1573 }
1574
1575 void
1576 strdump(void) {
1577 int i;
1578 printf("ESC%c", strescseq.type);
1579 for(i = 0; i < strescseq.len; i++) {
1580 uint c = strescseq.buf[i] & 0xff;
1581 if(isprint(c)) putchar(c);
1582 else if(c == '\n') printf("(\\n)");
1583 else if(c == '\r') printf("(\\r)");
1584 else if(c == 0x1b) printf("(\\e)");
1585 else printf("(%02x)", c);
1586 }
1587 printf("ESC\\\n");
1588 }
1589
1590 void
1591 strreset(void) {
1592 memset(&strescseq, 0, sizeof(strescseq));
1593 }
1594
1595 void
1596 tputtab(bool forward) {
1597 unsigned x = term.c.x;
1598
1599 if(forward) {
1600 if(x == term.col)
1601 return;
1602 for(++x; x < term.col && !term.tabs[x]; ++x)
1603 /* nothing */ ;
1604 } else {
1605 if(x == 0)
1606 return;
1607 for(--x; x > 0 && !term.tabs[x]; --x)
1608 /* nothing */ ;
1609 }
1610 tmoveto(x, term.c.y);
1611 }
1612
1613 void
1614 tputc(char *c) {
1615 char ascii = *c;
1616
1617 if(iofd != -1)
1618 write(iofd, c, 1);
1619
1620 if(term.esc & ESC_START) {
1621 if(term.esc & ESC_CSI) {
1622 csiescseq.buf[csiescseq.len++] = ascii;
1623 if(BETWEEN(ascii, 0x40, 0x7E) || csiescseq.len >= ESC_BUF_SIZ) {
1624 term.esc = 0;
1625 csiparse(), csihandle();
1626 }
1627 } else if(term.esc & ESC_STR) {
1628 switch(ascii) {
1629 case '\033':
1630 term.esc = ESC_START | ESC_STR_END;
1631 break;
1632 case '\a': /* backwards compatibility to xterm */
1633 term.esc = 0;
1634 strhandle();
1635 break;
1636 default:
1637 strescseq.buf[strescseq.len++] = ascii;
1638 if(strescseq.len+1 >= STR_BUF_SIZ) {
1639 term.esc = 0;
1640 strhandle();
1641 }
1642 }
1643 } else if(term.esc & ESC_STR_END) {
1644 term.esc = 0;
1645 if(ascii == '\\')
1646 strhandle();
1647 } else if(term.esc & ESC_ALTCHARSET) {
1648 switch(ascii) {
1649 case '0': /* Line drawing crap */
1650 term.c.attr.mode |= ATTR_GFX;
1651 break;
1652 case 'B': /* Back to regular text */
1653 term.c.attr.mode &= ~ATTR_GFX;
1654 break;
1655 default:
1656 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1657 }
1658 term.esc = 0;
1659 } else {
1660 switch(ascii) {
1661 case '[':
1662 term.esc |= ESC_CSI;
1663 break;
1664 case 'P': /* DCS -- Device Control String */
1665 case '_': /* APC -- Application Program Command */
1666 case '^': /* PM -- Privacy Message */
1667 case ']': /* OSC -- Operating System Command */
1668 case 'k': /* old title set compatibility */
1669 strreset();
1670 strescseq.type = ascii;
1671 term.esc |= ESC_STR;
1672 break;
1673 case '(':
1674 term.esc |= ESC_ALTCHARSET;
1675 break;
1676 case 'D': /* IND -- Linefeed */
1677 if(term.c.y == term.bot)
1678 tscrollup(term.top, 1);
1679 else
1680 tmoveto(term.c.x, term.c.y+1);
1681 term.esc = 0;
1682 break;
1683 case 'E': /* NEL -- Next line */
1684 tnewline(1); /* always go to first col */
1685 term.esc = 0;
1686 break;
1687 case 'H': /* HTS -- Horizontal tab stop */
1688 term.tabs[term.c.x] = 1;
1689 term.esc = 0;
1690 break;
1691 case 'M': /* RI -- Reverse index */
1692 if(term.c.y == term.top)
1693 tscrolldown(term.top, 1);
1694 else
1695 tmoveto(term.c.x, term.c.y-1);
1696 term.esc = 0;
1697 break;
1698 case 'c': /* RIS -- Reset to inital state */
1699 treset();
1700 term.esc = 0;
1701 xresettitle();
1702 break;
1703 case '=': /* DECPAM -- Application keypad */
1704 term.mode |= MODE_APPKEYPAD;
1705 term.esc = 0;
1706 break;
1707 case '>': /* DECPNM -- Normal keypad */
1708 term.mode &= ~MODE_APPKEYPAD;
1709 term.esc = 0;
1710 break;
1711 case '7': /* DECSC -- Save Cursor */
1712 tcursor(CURSOR_SAVE);
1713 term.esc = 0;
1714 break;
1715 case '8': /* DECRC -- Restore Cursor */
1716 tcursor(CURSOR_LOAD);
1717 term.esc = 0;
1718 break;
1719 case '\\': /* ST -- Stop */
1720 term.esc = 0;
1721 break;
1722 default:
1723 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
1724 (uchar) ascii, isprint(ascii)?ascii:'.');
1725 term.esc = 0;
1726 }
1727 }
1728 } else {
1729 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
1730 sel.bx = -1;
1731 switch(ascii) {
1732 case '\0': /* padding character, do nothing */
1733 break;
1734 case '\t':
1735 tputtab(1);
1736 break;
1737 case '\b':
1738 tmoveto(term.c.x-1, term.c.y);
1739 break;
1740 case '\r':
1741 tmoveto(0, term.c.y);
1742 break;
1743 case '\f':
1744 case '\v':
1745 case '\n':
1746 /* go to first col if the mode is set */
1747 tnewline(IS_SET(MODE_CRLF));
1748 break;
1749 case '\a':
1750 if(!(xw.state & WIN_FOCUSED))
1751 xseturgency(1);
1752 break;
1753 case '\033':
1754 csireset();
1755 term.esc = ESC_START;
1756 break;
1757 default:
1758 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1759 tnewline(1); /* always go to first col */
1760 tsetchar(c);
1761 if(term.c.x+1 < term.col)
1762 tmoveto(term.c.x+1, term.c.y);
1763 else
1764 term.c.state |= CURSOR_WRAPNEXT;
1765 }
1766 }
1767 }
1768
1769 int
1770 tresize(int col, int row) {
1771 int i, x;
1772 int minrow = MIN(row, term.row);
1773 int mincol = MIN(col, term.col);
1774 int slide = term.c.y - row + 1;
1775
1776 if(col < 1 || row < 1)
1777 return 0;
1778
1779 /* free unneeded rows */
1780 i = 0;
1781 if(slide > 0) {
1782 /* slide screen to keep cursor where we expect it -
1783 * tscrollup would work here, but we can optimize to
1784 * memmove because we're freeing the earlier lines */
1785 for(/* i = 0 */; i < slide; i++) {
1786 free(term.line[i]);
1787 free(term.alt[i]);
1788 }
1789 memmove(term.line, term.line + slide, row * sizeof(Line));
1790 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1791 }
1792 for(i += row; i < term.row; i++) {
1793 free(term.line[i]);
1794 free(term.alt[i]);
1795 }
1796
1797 /* resize to new height */
1798 term.line = xrealloc(term.line, row * sizeof(Line));
1799 term.alt = xrealloc(term.alt, row * sizeof(Line));
1800 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
1801 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
1802
1803 /* resize each row to new width, zero-pad if needed */
1804 for(i = 0; i < minrow; i++) {
1805 term.dirty[i] = 1;
1806 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
1807 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
1808 for(x = mincol; x < col; x++) {
1809 term.line[i][x].state = 0;
1810 term.alt[i][x].state = 0;
1811 }
1812 }
1813
1814 /* allocate any new rows */
1815 for(/* i == minrow */; i < row; i++) {
1816 term.dirty[i] = 1;
1817 term.line[i] = xcalloc(col, sizeof(Glyph));
1818 term.alt [i] = xcalloc(col, sizeof(Glyph));
1819 }
1820 if(col > term.col) {
1821 bool *bp = term.tabs + term.col;
1822
1823 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
1824 while(--bp > term.tabs && !*bp)
1825 /* nothing */ ;
1826 for(bp += TAB; bp < term.tabs + col; bp += TAB)
1827 *bp = 1;
1828 }
1829 /* update terminal size */
1830 term.col = col, term.row = row;
1831 /* make use of the LIMIT in tmoveto */
1832 tmoveto(term.c.x, term.c.y);
1833 /* reset scrolling region */
1834 tsetscroll(0, row-1);
1835
1836 return (slide > 0);
1837 }
1838
1839 void
1840 xresize(int col, int row) {
1841 xw.tw = MAX(1, 2*BORDER + col * xw.cw);
1842 xw.th = MAX(1, 2*BORDER + row * xw.ch);
1843 }
1844
1845 void
1846 xloadcols(void) {
1847 int i, r, g, b;
1848 XColor color;
1849 ulong white = WhitePixel(xw.dpy, xw.scr);
1850
1851 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
1852 for(i = 0; i < LEN(colorname); i++) {
1853 if(!colorname[i])
1854 continue;
1855 if(!XAllocNamedColor(xw.dpy, xw.cmap, colorname[i], &color, &color)) {
1856 dc.col[i] = white;
1857 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1858 } else
1859 dc.col[i] = color.pixel;
1860 }
1861
1862 /* load colors [16-255] ; same colors as xterm */
1863 for(i = 16, r = 0; r < 6; r++)
1864 for(g = 0; g < 6; g++)
1865 for(b = 0; b < 6; b++) {
1866 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1867 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1868 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1869 if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
1870 dc.col[i] = white;
1871 fprintf(stderr, "Could not allocate color %d\n", i);
1872 } else
1873 dc.col[i] = color.pixel;
1874 i++;
1875 }
1876
1877 for(r = 0; r < 24; r++, i++) {
1878 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1879 if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
1880 dc.col[i] = white;
1881 fprintf(stderr, "Could not allocate color %d\n", i);
1882 } else
1883 dc.col[i] = color.pixel;
1884 }
1885 }
1886
1887 void
1888 xclear(int x1, int y1, int x2, int y2) {
1889 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
1890 XFillRectangle(xw.dpy, xw.buf, dc.gc,
1891 BORDER + x1 * xw.cw, BORDER + y1 * xw.ch,
1892 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1893 }
1894
1895 void
1896 xhints(void) {
1897 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
1898 XWMHints wm = {.flags = InputHint, .input = 1};
1899 XSizeHints *sizeh = NULL;
1900
1901 sizeh = XAllocSizeHints();
1902 if(xw.isfixed == False) {
1903 sizeh->flags = PSize | PResizeInc | PBaseSize;
1904 sizeh->height = xw.h;
1905 sizeh->width = xw.w;
1906 sizeh->height_inc = xw.ch;
1907 sizeh->width_inc = xw.cw;
1908 sizeh->base_height = 2*BORDER;
1909 sizeh->base_width = 2*BORDER;
1910 } else {
1911 sizeh->flags = PMaxSize | PMinSize;
1912 sizeh->min_width = sizeh->max_width = xw.fw;
1913 sizeh->min_height = sizeh->max_height = xw.fh;
1914 }
1915
1916 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
1917 XFree(sizeh);
1918 }
1919
1920 XFontSet
1921 xinitfont(char *fontstr) {
1922 XFontSet set;
1923 char *def, **missing;
1924 int n;
1925
1926 missing = NULL;
1927 set = XCreateFontSet(xw.dpy, fontstr, &missing, &n, &def);
1928 if(missing) {
1929 while(n--)
1930 fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
1931 XFreeStringList(missing);
1932 }
1933 return set;
1934 }
1935
1936 void
1937 xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing) {
1938 XFontStruct **xfonts;
1939 char **font_names;
1940 int i, n;
1941
1942 *ascent = *descent = *lbearing = *rbearing = 0;
1943 n = XFontsOfFontSet(set, &xfonts, &font_names);
1944 for(i = 0; i < n; i++) {
1945 *ascent = MAX(*ascent, (*xfonts)->ascent);
1946 *descent = MAX(*descent, (*xfonts)->descent);
1947 *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
1948 *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
1949 xfonts++;
1950 }
1951 }
1952
1953 void
1954 initfonts(char *fontstr, char *bfontstr, char *ifontstr, char *ibfontstr) {
1955 if((dc.font.set = xinitfont(fontstr)) == NULL)
1956 die("Can't load font %s\n", fontstr);
1957 if((dc.bfont.set = xinitfont(bfontstr)) == NULL)
1958 die("Can't load bfont %s\n", bfontstr);
1959 if((dc.ifont.set = xinitfont(ifontstr)) == NULL)
1960 die("Can't load ifont %s\n", ifontstr);
1961 if((dc.ibfont.set = xinitfont(ibfontstr)) == NULL)
1962 die("Can't load ibfont %s\n", ibfontstr);
1963
1964 xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
1965 &dc.font.lbearing, &dc.font.rbearing);
1966 xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
1967 &dc.bfont.lbearing, &dc.bfont.rbearing);
1968 xgetfontinfo(dc.ifont.set, &dc.ifont.ascent, &dc.ifont.descent,
1969 &dc.ifont.lbearing, &dc.ifont.rbearing);
1970 xgetfontinfo(dc.ibfont.set, &dc.ibfont.ascent, &dc.ibfont.descent,
1971 &dc.ibfont.lbearing, &dc.ibfont.rbearing);
1972 }
1973
1974 void
1975 xinit(void) {
1976 XSetWindowAttributes attrs;
1977 Cursor cursor;
1978 Window parent;
1979 int sw, sh, major, minor;
1980
1981 if(!(xw.dpy = XOpenDisplay(NULL)))
1982 die("Can't open display\n");
1983 xw.scr = XDefaultScreen(xw.dpy);
1984
1985 /* font */
1986 initfonts(FONT, BOLDFONT, ITALICFONT, ITALICBOLDFONT);
1987
1988 /* XXX: Assuming same size for bold font */
1989 xw.cw = dc.font.rbearing - dc.font.lbearing;
1990 xw.ch = dc.font.ascent + dc.font.descent;
1991
1992 /* colors */
1993 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1994 xloadcols();
1995
1996 /* adjust fixed window geometry */
1997 if(xw.isfixed) {
1998 sw = DisplayWidth(xw.dpy, xw.scr);
1999 sh = DisplayHeight(xw.dpy, xw.scr);
2000 if(xw.fx < 0)
2001 xw.fx = sw + xw.fx - xw.fw - 1;
2002 if(xw.fy < 0)
2003 xw.fy = sh + xw.fy - xw.fh - 1;
2004
2005 xw.h = xw.fh;
2006 xw.w = xw.fw;
2007 } else {
2008 /* window - default size */
2009 xw.h = 2*BORDER + term.row * xw.ch;
2010 xw.w = 2*BORDER + term.col * xw.cw;
2011 xw.fx = 0;
2012 xw.fy = 0;
2013 }
2014
2015 attrs.background_pixel = dc.col[DefaultBG];
2016 attrs.border_pixel = dc.col[DefaultBG];
2017 attrs.bit_gravity = NorthWestGravity;
2018 attrs.event_mask = FocusChangeMask | KeyPressMask
2019 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2020 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2021 attrs.colormap = xw.cmap;
2022
2023 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
2024 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2025 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2026 XDefaultVisual(xw.dpy, xw.scr),
2027 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2028 | CWColormap,
2029 &attrs);
2030 if(!XdbeQueryExtension(xw.dpy, &major, &minor))
2031 die("Xdbe extension is not present\n");
2032 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
2033
2034 /* input methods */
2035 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
2036 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2037 | XIMStatusNothing, XNClientWindow, xw.win,
2038 XNFocusWindow, xw.win, NULL);
2039 /* gc */
2040 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
2041
2042 /* white cursor, black outline */
2043 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2044 XDefineCursor(xw.dpy, xw.win, cursor);
2045 XRecolorCursor(xw.dpy, cursor,
2046 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2047 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2048
2049 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2050
2051 xresettitle();
2052 XMapWindow(xw.dpy, xw.win);
2053 xhints();
2054 XSync(xw.dpy, 0);
2055 }
2056
2057 void
2058 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2059 int fg = base.fg, bg = base.bg, temp;
2060 int winx = BORDER+x*xw.cw, winy = BORDER+y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
2061 XFontSet fontset = dc.font.set;
2062 int i;
2063
2064 /* only switch default fg/bg if term is in RV mode */
2065 if(IS_SET(MODE_REVERSE)) {
2066 if(fg == DefaultFG)
2067 fg = DefaultBG;
2068 if(bg == DefaultBG)
2069 bg = DefaultFG;
2070 }
2071
2072 if(base.mode & ATTR_REVERSE)
2073 temp = fg, fg = bg, bg = temp;
2074
2075 if(base.mode & ATTR_BOLD) {
2076 fg += 8;
2077 fontset = dc.bfont.set;
2078 }
2079
2080 if(base.mode & ATTR_ITALIC)
2081 fontset = dc.ifont.set;
2082 if(base.mode & (ATTR_ITALIC|ATTR_ITALIC))
2083 fontset = dc.ibfont.set;
2084
2085 XSetBackground(xw.dpy, dc.gc, dc.col[bg]);
2086 XSetForeground(xw.dpy, dc.gc, dc.col[fg]);
2087
2088 if(base.mode & ATTR_GFX) {
2089 for(i = 0; i < bytelen; i++) {
2090 char c = gfx[(uint)s[i] % 256];
2091 if(c)
2092 s[i] = c;
2093 else if(s[i] > 0x5f)
2094 s[i] -= 0x5f;
2095 }
2096 }
2097
2098 XmbDrawImageString(xw.dpy, xw.buf, fontset, dc.gc, winx, winy, s, bytelen);
2099
2100 if(base.mode & ATTR_UNDERLINE)
2101 XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
2102 }
2103
2104 void
2105 xdrawcursor(void) {
2106 static int oldx = 0;
2107 static int oldy = 0;
2108 int sl;
2109 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
2110
2111 LIMIT(oldx, 0, term.col-1);
2112 LIMIT(oldy, 0, term.row-1);
2113
2114 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2115 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2116
2117 /* remove the old cursor */
2118 if(term.line[oldy][oldx].state & GLYPH_SET) {
2119 sl = utf8size(term.line[oldy][oldx].c);
2120 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
2121 } else
2122 xclear(oldx, oldy, oldx, oldy);
2123
2124 /* draw the new one */
2125 if(!(term.c.state & CURSOR_HIDE)) {
2126 if(!(xw.state & WIN_FOCUSED))
2127 g.bg = DefaultUCS;
2128
2129 if(IS_SET(MODE_REVERSE))
2130 g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
2131
2132 sl = utf8size(g.c);
2133 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2134 oldx = term.c.x, oldy = term.c.y;
2135 }
2136 }
2137
2138 void
2139 xresettitle(void) {
2140 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
2141 }
2142
2143 void
2144 redraw(void) {
2145 struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
2146
2147 xclear(0, 0, xw.w, xw.h);
2148 tfulldirt();
2149 draw();
2150 XSync(xw.dpy, False); /* necessary for a good tput flash */
2151 nanosleep(&tv, NULL);
2152 }
2153
2154 void
2155 draw() {
2156 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2157
2158 drawregion(0, 0, term.col, term.row);
2159 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2160 }
2161
2162 void
2163 drawregion(int x1, int y1, int x2, int y2) {
2164 int ic, ib, x, y, ox, sl;
2165 Glyph base, new;
2166 char buf[DRAW_BUF_SIZ];
2167 bool ena_sel = sel.bx != -1, alt = IS_SET(MODE_ALTSCREEN);
2168
2169 if((sel.alt && !alt) || (!sel.alt && alt))
2170 ena_sel = 0;
2171 if(!(xw.state & WIN_VISIBLE))
2172 return;
2173
2174 for(y = y1; y < y2; y++) {
2175 if(!term.dirty[y])
2176 continue;
2177 xclear(0, y, term.col, y);
2178 term.dirty[y] = 0;
2179 base = term.line[y][0];
2180 ic = ib = ox = 0;
2181 for(x = x1; x < x2; x++) {
2182 new = term.line[y][x];
2183 if(ena_sel && *(new.c) && selected(x, y))
2184 new.mode ^= ATTR_REVERSE;
2185 if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
2186 ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2187 xdraws(buf, base, ox, y, ic, ib);
2188 ic = ib = 0;
2189 }
2190 if(new.state & GLYPH_SET) {
2191 if(ib == 0) {
2192 ox = x;
2193 base = new;
2194 }
2195 sl = utf8size(new.c);
2196 memcpy(buf+ib, new.c, sl);
2197 ib += sl;
2198 ++ic;
2199 }
2200 }
2201 if(ib > 0)
2202 xdraws(buf, base, ox, y, ic, ib);
2203 }
2204 xdrawcursor();
2205 }
2206
2207 void
2208 expose(XEvent *ev) {
2209 XExposeEvent *e = &ev->xexpose;
2210 if(xw.state & WIN_REDRAW) {
2211 if(!e->count)
2212 xw.state &= ~WIN_REDRAW;
2213 }
2214 }
2215
2216 void
2217 visibility(XEvent *ev) {
2218 XVisibilityEvent *e = &ev->xvisibility;
2219 if(e->state == VisibilityFullyObscured)
2220 xw.state &= ~WIN_VISIBLE;
2221 else if(!(xw.state & WIN_VISIBLE))
2222 /* need a full redraw for next Expose, not just a buf copy */
2223 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2224 }
2225
2226 void
2227 unmap(XEvent *ev) {
2228 xw.state &= ~WIN_VISIBLE;
2229 }
2230
2231 void
2232 xseturgency(int add) {
2233 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2234 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2235 XSetWMHints(xw.dpy, xw.win, h);
2236 XFree(h);
2237 }
2238
2239 void
2240 focus(XEvent *ev) {
2241 if(ev->type == FocusIn) {
2242 xw.state |= WIN_FOCUSED;
2243 xseturgency(0);
2244 } else
2245 xw.state &= ~WIN_FOCUSED;
2246 }
2247
2248 char*
2249 kmap(KeySym k, uint state) {
2250 int i;
2251 state &= ~Mod2Mask;
2252 for(i = 0; i < LEN(key); i++) {
2253 uint mask = key[i].mask;
2254 if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
2255 return (char*)key[i].s;
2256 }
2257 return NULL;
2258 }
2259
2260 void
2261 kpress(XEvent *ev) {
2262 XKeyEvent *e = &ev->xkey;
2263 KeySym ksym;
2264 char buf[32];
2265 char *customkey;
2266 int len;
2267 int meta;
2268 int shift;
2269 Status status;
2270
2271 meta = e->state & Mod1Mask;
2272 shift = e->state & ShiftMask;
2273 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
2274
2275 /* 1. custom keys from config.h */
2276 if((customkey = kmap(ksym, e->state)))
2277 ttywrite(customkey, strlen(customkey));
2278 /* 2. hardcoded (overrides X lookup) */
2279 else
2280 switch(ksym) {
2281 case XK_Up:
2282 case XK_Down:
2283 case XK_Left:
2284 case XK_Right:
2285 /* XXX: shift up/down doesn't work */
2286 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
2287 ttywrite(buf, 3);
2288 break;
2289 case XK_Insert:
2290 if(shift)
2291 selpaste();
2292 break;
2293 case XK_Return:
2294 if(IS_SET(MODE_CRLF))
2295 ttywrite("\r\n", 2);
2296 else
2297 ttywrite("\r", 1);
2298 break;
2299 /* 3. X lookup */
2300 default:
2301 if(len > 0) {
2302 if(meta && len == 1)
2303 ttywrite("\033", 1);
2304 ttywrite(buf, len);
2305 }
2306 break;
2307 }
2308 }
2309
2310 void
2311 cmessage(XEvent *e) {
2312 /* See xembed specs
2313 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2314 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2315 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2316 xw.state |= WIN_FOCUSED;
2317 xseturgency(0);
2318 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2319 xw.state &= ~WIN_FOCUSED;
2320 }
2321 }
2322 }
2323
2324 void
2325 resize(XEvent *e) {
2326 int col, row;
2327
2328 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2329 return;
2330
2331 xw.w = e->xconfigure.width;
2332 xw.h = e->xconfigure.height;
2333 col = (xw.w - 2*BORDER) / xw.cw;
2334 row = (xw.h - 2*BORDER) / xw.ch;
2335 if(col == term.col && row == term.row)
2336 return;
2337
2338 xclear(0, 0, xw.w, xw.h);
2339 tresize(col, row);
2340 xresize(col, row);
2341 ttyresize(col, row);
2342 }
2343
2344 void
2345 run(void) {
2346 XEvent ev;
2347 fd_set rfd;
2348 int xfd = XConnectionNumber(xw.dpy), i;
2349 struct timeval drawtimeout, *tv = NULL;
2350
2351 for(i = 0;; i++) {
2352 FD_ZERO(&rfd);
2353 FD_SET(cmdfd, &rfd);
2354 FD_SET(xfd, &rfd);
2355 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
2356 if(errno == EINTR)
2357 continue;
2358 die("select failed: %s\n", SERRNO);
2359 }
2360
2361 /*
2362 * Stop after a certain number of reads so the user does not
2363 * feel like the system is stuttering.
2364 */
2365 if(i < 1000 && FD_ISSET(cmdfd, &rfd)) {
2366 ttyread();
2367
2368 /*
2369 * Just wait a bit so it isn't disturbing the
2370 * user and the system is able to write something.
2371 */
2372 drawtimeout.tv_sec = 0;
2373 drawtimeout.tv_usec = 5;
2374 tv = &drawtimeout;
2375 continue;
2376 }
2377 i = 0;
2378 tv = NULL;
2379
2380 while(XPending(xw.dpy)) {
2381 XNextEvent(xw.dpy, &ev);
2382 if(XFilterEvent(&ev, xw.win))
2383 continue;
2384 if(handler[ev.type])
2385 (handler[ev.type])(&ev);
2386 }
2387
2388 draw();
2389 XFlush(xw.dpy);
2390 }
2391 }
2392
2393 int
2394 main(int argc, char *argv[]) {
2395 int i, bitm, xr, yr;
2396 unsigned int wr, hr;
2397
2398 xw.fw = xw.fh = xw.fx = xw.fy = 0;
2399 xw.isfixed = False;
2400
2401 for(i = 1; i < argc; i++) {
2402 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2403 case 't':
2404 if(++i < argc) opt_title = argv[i];
2405 break;
2406 case 'c':
2407 if(++i < argc) opt_class = argv[i];
2408 break;
2409 case 'w':
2410 if(++i < argc) opt_embed = argv[i];
2411 break;
2412 case 'f':
2413 if(++i < argc) opt_io = argv[i];
2414 break;
2415 case 'e':
2416 /* eat every remaining arguments */
2417 if(++i < argc) opt_cmd = &argv[i];
2418 goto run;
2419 case 'g':
2420 if(++i >= argc)
2421 break;
2422
2423 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
2424 if(bitm & XValue)
2425 xw.fx = xr;
2426 if(bitm & YValue)
2427 xw.fy = yr;
2428 if(bitm & WidthValue)
2429 xw.fw = (int)wr;
2430 if(bitm & HeightValue)
2431 xw.fh = (int)hr;
2432 if(bitm & XNegative && xw.fx == 0)
2433 xw.fx = -1;
2434 if(bitm & XNegative && xw.fy == 0)
2435 xw.fy = -1;
2436
2437 if(xw.fh != 0 && xw.fw != 0)
2438 xw.isfixed = True;
2439 break;
2440 case 'v':
2441 default:
2442 die(USAGE);
2443 }
2444 }
2445
2446 run:
2447 setlocale(LC_CTYPE, "");
2448 tnew(80, 24);
2449 ttynew();
2450 xinit();
2451 selinit();
2452 run();
2453 return 0;
2454 }
2455