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