Xinqi Bao's Git

projects / st.git / blob
summary | log | commit | diff | tree
history | raw | HEAD
Adding instantenous debug output and fixing italic with a reset.
[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 draw();
555 }
556 }
557
558 void
559 selcopy(void) {
560 char *str, *ptr;
561 int x, y, bufsize, is_selected = 0;
562
563 if(sel.bx == -1)
564 str = NULL;
565
566 else {
567 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
568 ptr = str = malloc(bufsize);
569
570 /* append every set & selected glyph to the selection */
571 for(y = 0; y < term.row; y++) {
572 for(x = 0; x < term.col; x++) {
573 is_selected = selected(x, y);
574 if((term.line[y][x].state & GLYPH_SET) && is_selected) {
575 int size = utf8size(term.line[y][x].c);
576 memcpy(ptr, term.line[y][x].c, size);
577 ptr += size;
578 }
579 }
580
581 /* \n at the end of every selected line except for the last one */
582 if(is_selected && y < sel.e.y)
583 *ptr++ = '\n';
584 }
585 *ptr = 0;
586 }
587 sel.alt = IS_SET(MODE_ALTSCREEN);
588 xsetsel(str);
589 }
590
591 void
592 selnotify(XEvent *e) {
593 ulong nitems, ofs, rem;
594 int format;
595 uchar *data;
596 Atom type;
597
598 ofs = 0;
599 do {
600 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
601 False, AnyPropertyType, &type, &format,
602 &nitems, &rem, &data)) {
603 fprintf(stderr, "Clipboard allocation failed\n");
604 return;
605 }
606 ttywrite((const char *) data, nitems * format / 8);
607 XFree(data);
608 /* number of 32-bit chunks returned */
609 ofs += nitems * format / 32;
610 } while(rem > 0);
611 }
612
613 void
614 selpaste() {
615 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY, xw.win, CurrentTime);
616 }
617
618 void selclear(XEvent *e) {
619 if(sel.bx == -1)
620 return;
621 sel.bx = -1;
622 tsetdirt(sel.b.y, sel.e.y);
623 draw();
624 }
625
626 void
627 selrequest(XEvent *e) {
628 XSelectionRequestEvent *xsre;
629 XSelectionEvent xev;
630 Atom xa_targets;
631
632 xsre = (XSelectionRequestEvent *) e;
633 xev.type = SelectionNotify;
634 xev.requestor = xsre->requestor;
635 xev.selection = xsre->selection;
636 xev.target = xsre->target;
637 xev.time = xsre->time;
638 /* reject */
639 xev.property = None;
640
641 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
642 if(xsre->target == xa_targets) {
643 /* respond with the supported type */
644 Atom string = sel.xtarget;
645 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
646 XA_ATOM, 32, PropModeReplace,
647 (uchar *) &string, 1);
648 xev.property = xsre->property;
649 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
650 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
651 xsre->target, 8, PropModeReplace,
652 (uchar *) sel.clip, strlen(sel.clip));
653 xev.property = xsre->property;
654 }
655
656 /* all done, send a notification to the listener */
657 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
658 fprintf(stderr, "Error sending SelectionNotify event\n");
659 }
660
661 void
662 xsetsel(char *str) {
663 /* register the selection for both the clipboard and the primary */
664 Atom clipboard;
665
666 free(sel.clip);
667 sel.clip = str;
668
669 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
670
671 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
672 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
673
674 XFlush(xw.dpy);
675 }
676
677 void
678 brelease(XEvent *e) {
679 if(IS_SET(MODE_MOUSE)) {
680 mousereport(e);
681 return;
682 }
683 if(e->xbutton.button == Button2)
684 selpaste();
685 else if(e->xbutton.button == Button1) {
686 sel.mode = 0;
687 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
688 term.dirty[sel.ey] = 1;
689 if(sel.bx == sel.ex && sel.by == sel.ey) {
690 struct timeval now;
691 sel.bx = -1;
692 gettimeofday(&now, NULL);
693
694 if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
695 /* triple click on the line */
696 sel.b.x = sel.bx = 0;
697 sel.e.x = sel.ex = term.col;
698 sel.b.y = sel.e.y = sel.ey;
699 selcopy();
700 } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
701 /* double click to select word */
702 sel.bx = sel.ex;
703 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
704 term.line[sel.ey][sel.bx-1].c[0] != ' ') sel.bx--;
705 sel.b.x = sel.bx;
706 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
707 term.line[sel.ey][sel.ex+1].c[0] != ' ') sel.ex++;
708 sel.e.x = sel.ex;
709 sel.b.y = sel.e.y = sel.ey;
710 selcopy();
711 }
712 } else
713 selcopy();
714 }
715 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
716 gettimeofday(&sel.tclick1, NULL);
717 draw();
718 }
719
720 void
721 bmotion(XEvent *e) {
722 if(IS_SET(MODE_MOUSE)) {
723 mousereport(e);
724 return;
725 }
726 if(sel.mode) {
727 int oldey = sel.ey, oldex = sel.ex;
728 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
729
730 if(oldey != sel.ey || oldex != sel.ex) {
731 int starty = MIN(oldey, sel.ey);
732 int endy = MAX(oldey, sel.ey);
733 tsetdirt(starty, endy);
734 draw();
735 }
736 }
737 }
738
739 void
740 die(const char *errstr, ...) {
741 va_list ap;
742
743 va_start(ap, errstr);
744 vfprintf(stderr, errstr, ap);
745 va_end(ap);
746 exit(EXIT_FAILURE);
747 }
748
749 void
750 execsh(void) {
751 char **args;
752 char *envshell = getenv("SHELL");
753
754 unsetenv("COLUMNS");
755 unsetenv("LINES");
756 unsetenv("TERMCAP");
757
758 DEFAULT(envshell, SHELL);
759 putenv("TERM="TNAME);
760 args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
761 execvp(args[0], args);
762 exit(EXIT_FAILURE);
763 }
764
765 void
766 sigchld(int a) {
767 int stat = 0;
768 if(waitpid(pid, &stat, 0) < 0)
769 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
770 if(WIFEXITED(stat))
771 exit(WEXITSTATUS(stat));
772 else
773 exit(EXIT_FAILURE);
774 }
775
776 void
777 ttynew(void) {
778 int m, s;
779
780 /* seems to work fine on linux, openbsd and freebsd */
781 struct winsize w = {term.row, term.col, 0, 0};
782 if(openpty(&m, &s, NULL, NULL, &w) < 0)
783 die("openpty failed: %s\n", SERRNO);
784
785 switch(pid = fork()) {
786 case -1:
787 die("fork failed\n");
788 break;
789 case 0:
790 setsid(); /* create a new process group */
791 dup2(s, STDIN_FILENO);
792 dup2(s, STDOUT_FILENO);
793 dup2(s, STDERR_FILENO);
794 if(ioctl(s, TIOCSCTTY, NULL) < 0)
795 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
796 close(s);
797 close(m);
798 execsh();
799 break;
800 default:
801 close(s);
802 cmdfd = m;
803 signal(SIGCHLD, sigchld);
804 if(opt_io && !(fileio = fopen(opt_io, "w"))) {
805 fprintf(stderr, "Error opening %s:%s\n",
806 opt_io, strerror(errno));
807 }
808 }
809 }
810
811 void
812 dump(char c) {
813 static int col;
814 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
815 if(++col % 10 == 0)
816 fprintf(stderr, "\n");
817 }
818
819 void
820 ttyread(void) {
821 static char buf[BUFSIZ];
822 static int buflen = 0;
823 char *ptr;
824 char s[UTF_SIZ];
825 int charsize; /* size of utf8 char in bytes */
826 long utf8c;
827 int ret;
828
829 /* append read bytes to unprocessed bytes */
830 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
831 die("Couldn't read from shell: %s\n", SERRNO);
832
833 /* process every complete utf8 char */
834 buflen += ret;
835 ptr = buf;
836 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
837 charsize = utf8decode(ptr, &utf8c);
838 utf8encode(&utf8c, s);
839 tputc(s);
840 ptr += charsize;
841 buflen -= charsize;
842 }
843
844 /* keep any uncomplete utf8 char for the next call */
845 memmove(buf, ptr, buflen);
846 }
847
848 void
849 ttywrite(const char *s, size_t n) {
850 if(write(cmdfd, s, n) == -1)
851 die("write error on tty: %s\n", SERRNO);
852 }
853
854 void
855 ttyresize(int x, int y) {
856 struct winsize w;
857
858 w.ws_row = term.row;
859 w.ws_col = term.col;
860 w.ws_xpixel = xw.w;
861 w.ws_ypixel = xw.h;
862 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
863 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
864 }
865
866 void
867 tsetdirt(int top, int bot)
868 {
869 int i;
870
871 LIMIT(top, 0, term.row-1);
872 LIMIT(bot, 0, term.row-1);
873
874 for(i = top; i <= bot; i++)
875 term.dirty[i] = 1;
876 }
877
878 void
879 tfulldirt(void)
880 {
881 tsetdirt(0, term.row-1);
882 }
883
884 void
885 tcursor(int mode) {
886 static TCursor c;
887
888 if(mode == CURSOR_SAVE)
889 c = term.c;
890 else if(mode == CURSOR_LOAD)
891 term.c = c, tmoveto(c.x, c.y);
892 }
893
894 void
895 treset(void) {
896 unsigned i;
897 term.c = (TCursor){{
898 .mode = ATTR_NULL,
899 .fg = DefaultFG,
900 .bg = DefaultBG
901 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
902
903 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
904 for(i = TAB; i < term.col; i += TAB)
905 term.tabs[i] = 1;
906 term.top = 0, term.bot = term.row - 1;
907 term.mode = MODE_WRAP;
908 tclearregion(0, 0, term.col-1, term.row-1);
909 }
910
911 void
912 tnew(int col, int row) {
913 /* set screen size */
914 term.row = row, term.col = col;
915 term.line = malloc(term.row * sizeof(Line));
916 term.alt = malloc(term.row * sizeof(Line));
917 term.dirty = malloc(term.row * sizeof(*term.dirty));
918 term.tabs = malloc(term.col * sizeof(*term.tabs));
919
920 for(row = 0; row < term.row; row++) {
921 term.line[row] = malloc(term.col * sizeof(Glyph));
922 term.alt [row] = malloc(term.col * sizeof(Glyph));
923 term.dirty[row] = 0;
924 }
925 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
926 /* setup screen */
927 treset();
928 }
929
930 void
931 tswapscreen(void) {
932 Line* tmp = term.line;
933 term.line = term.alt;
934 term.alt = tmp;
935 term.mode ^= MODE_ALTSCREEN;
936 tfulldirt();
937 }
938
939 void
940 tscrolldown(int orig, int n) {
941 int i;
942 Line temp;
943
944 LIMIT(n, 0, term.bot-orig+1);
945
946 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
947
948 for(i = term.bot; i >= orig+n; i--) {
949 temp = term.line[i];
950 term.line[i] = term.line[i-n];
951 term.line[i-n] = temp;
952
953 term.dirty[i] = 1;
954 term.dirty[i-n] = 1;
955 }
956
957 selscroll(orig, n);
958 }
959
960 void
961 tscrollup(int orig, int n) {
962 int i;
963 Line temp;
964 LIMIT(n, 0, term.bot-orig+1);
965
966 tclearregion(0, orig, term.col-1, orig+n-1);
967
968 for(i = orig; i <= term.bot-n; i++) {
969 temp = term.line[i];
970 term.line[i] = term.line[i+n];
971 term.line[i+n] = temp;
972
973 term.dirty[i] = 1;
974 term.dirty[i+n] = 1;
975 }
976
977 selscroll(orig, -n);
978 }
979
980 void
981 selscroll(int orig, int n) {
982 if(sel.bx == -1)
983 return;
984
985 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
986 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
987 sel.bx = -1;
988 return;
989 }
990 if(sel.by < term.top) {
991 sel.by = term.top;
992 sel.bx = 0;
993 }
994 if(sel.ey > term.bot) {
995 sel.ey = term.bot;
996 sel.ex = term.col;
997 }
998 sel.b.y = sel.by, sel.b.x = sel.bx;
999 sel.e.y = sel.ey, sel.e.x = sel.ex;
1000 }
1001 }
1002
1003 void
1004 tnewline(int first_col) {
1005 int y = term.c.y;
1006 if(y == term.bot)
1007 tscrollup(term.top, 1);
1008 else
1009 y++;
1010 tmoveto(first_col ? 0 : term.c.x, y);
1011 }
1012
1013 void
1014 csiparse(void) {
1015 /* int noarg = 1; */
1016 char *p = csiescseq.buf;
1017
1018 csiescseq.narg = 0;
1019 if(*p == '?')
1020 csiescseq.priv = 1, p++;
1021
1022 while(p < csiescseq.buf+csiescseq.len) {
1023 while(isdigit(*p)) {
1024 csiescseq.arg[csiescseq.narg] *= 10;
1025 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1026 }
1027 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ)
1028 csiescseq.narg++, p++;
1029 else {
1030 csiescseq.mode = *p;
1031 csiescseq.narg++;
1032 return;
1033 }
1034 }
1035 }
1036
1037 void
1038 tmoveto(int x, int y) {
1039 LIMIT(x, 0, term.col-1);
1040 LIMIT(y, 0, term.row-1);
1041 term.c.state &= ~CURSOR_WRAPNEXT;
1042 term.c.x = x;
1043 term.c.y = y;
1044 }
1045
1046 void
1047 tsetchar(char *c) {
1048 term.dirty[term.c.y] = 1;
1049 term.line[term.c.y][term.c.x] = term.c.attr;
1050 memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
1051 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
1052 }
1053
1054 void
1055 tclearregion(int x1, int y1, int x2, int y2) {
1056 int x, y, temp;
1057
1058 if(x1 > x2)
1059 temp = x1, x1 = x2, x2 = temp;
1060 if(y1 > y2)
1061 temp = y1, y1 = y2, y2 = temp;
1062
1063 LIMIT(x1, 0, term.col-1);
1064 LIMIT(x2, 0, term.col-1);
1065 LIMIT(y1, 0, term.row-1);
1066 LIMIT(y2, 0, term.row-1);
1067
1068 for(y = y1; y <= y2; y++) {
1069 term.dirty[y] = 1;
1070 for(x = x1; x <= x2; x++)
1071 term.line[y][x].state = 0;
1072 }
1073 }
1074
1075 void
1076 tdeletechar(int n) {
1077 int src = term.c.x + n;
1078 int dst = term.c.x;
1079 int size = term.col - src;
1080
1081 term.dirty[term.c.y] = 1;
1082
1083 if(src >= term.col) {
1084 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1085 return;
1086 }
1087 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1088 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1089 }
1090
1091 void
1092 tinsertblank(int n) {
1093 int src = term.c.x;
1094 int dst = src + n;
1095 int size = term.col - dst;
1096
1097 term.dirty[term.c.y] = 1;
1098
1099 if(dst >= term.col) {
1100 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1101 return;
1102 }
1103 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1104 tclearregion(src, term.c.y, dst - 1, term.c.y);
1105 }
1106
1107 void
1108 tinsertblankline(int n) {
1109 if(term.c.y < term.top || term.c.y > term.bot)
1110 return;
1111
1112 tscrolldown(term.c.y, n);
1113 }
1114
1115 void
1116 tdeleteline(int n) {
1117 if(term.c.y < term.top || term.c.y > term.bot)
1118 return;
1119
1120 tscrollup(term.c.y, n);
1121 }
1122
1123 void
1124 tsetattr(int *attr, int l) {
1125 int i;
1126
1127 for(i = 0; i < l; i++) {
1128 switch(attr[i]) {
1129 case 0:
1130 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1131 | ATTR_ITALIC);
1132 term.c.attr.fg = DefaultFG;
1133 term.c.attr.bg = DefaultBG;
1134 break;
1135 case 1:
1136 term.c.attr.mode |= ATTR_BOLD;
1137 break;
1138 case 3: /* enter standout (highlight) */
1139 term.c.attr.mode |= ATTR_ITALIC;
1140 break;
1141 case 4:
1142 term.c.attr.mode |= ATTR_UNDERLINE;
1143 break;
1144 case 7:
1145 term.c.attr.mode |= ATTR_REVERSE;
1146 break;
1147 case 22:
1148 term.c.attr.mode &= ~ATTR_BOLD;
1149 break;
1150 case 23: /* leave standout (highlight) mode */
1151 term.c.attr.mode &= ~ATTR_ITALIC;
1152 break;
1153 case 24:
1154 term.c.attr.mode &= ~ATTR_UNDERLINE;
1155 break;
1156 case 27:
1157 term.c.attr.mode &= ~ATTR_REVERSE;
1158 break;
1159 case 38:
1160 if(i + 2 < l && attr[i + 1] == 5) {
1161 i += 2;
1162 if(BETWEEN(attr[i], 0, 255))
1163 term.c.attr.fg = attr[i];
1164 else
1165 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
1166 }
1167 else
1168 fprintf(stderr, "erresc(38): gfx attr %d unknown\n", attr[i]);
1169 break;
1170 case 39:
1171 term.c.attr.fg = DefaultFG;
1172 break;
1173 case 48:
1174 if(i + 2 < l && attr[i + 1] == 5) {
1175 i += 2;
1176 if(BETWEEN(attr[i], 0, 255))
1177 term.c.attr.bg = attr[i];
1178 else
1179 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
1180 }
1181 else
1182 fprintf(stderr, "erresc(48): gfx attr %d unknown\n", attr[i]);
1183 break;
1184 case 49:
1185 term.c.attr.bg = DefaultBG;
1186 break;
1187 default:
1188 if(BETWEEN(attr[i], 30, 37))
1189 term.c.attr.fg = attr[i] - 30;
1190 else if(BETWEEN(attr[i], 40, 47))
1191 term.c.attr.bg = attr[i] - 40;
1192 else if(BETWEEN(attr[i], 90, 97))
1193 term.c.attr.fg = attr[i] - 90 + 8;
1194 else if(BETWEEN(attr[i], 100, 107))
1195 term.c.attr.fg = attr[i] - 100 + 8;
1196 else
1197 fprintf(stderr, "erresc(default): gfx attr %d unknown\n", attr[i]), csidump();
1198 break;
1199 }
1200 }
1201 }
1202
1203 void
1204 tsetscroll(int t, int b) {
1205 int temp;
1206
1207 LIMIT(t, 0, term.row-1);
1208 LIMIT(b, 0, term.row-1);
1209 if(t > b) {
1210 temp = t;
1211 t = b;
1212 b = temp;
1213 }
1214 term.top = t;
1215 term.bot = b;
1216 }
1217
1218 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1219
1220 void
1221 tsetmode(bool priv, bool set, int *args, int narg) {
1222 int *lim, mode;
1223
1224 for(lim = args + narg; args < lim; ++args) {
1225 if(priv) {
1226 switch(*args) {
1227 case 1:
1228 MODBIT(term.mode, set, MODE_APPKEYPAD);
1229 break;
1230 case 5: /* DECSCNM -- Reverve video */
1231 mode = term.mode;
1232 MODBIT(term.mode,set, MODE_REVERSE);
1233 if(mode != term.mode)
1234 redraw();
1235 break;
1236 case 7:
1237 MODBIT(term.mode, set, MODE_WRAP);
1238 break;
1239 case 20:
1240 MODBIT(term.mode, set, MODE_CRLF);
1241 break;
1242 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1243 break;
1244 case 25:
1245 MODBIT(term.c.state, !set, CURSOR_HIDE);
1246 break;
1247 case 1000: /* 1000,1002: enable xterm mouse report */
1248 MODBIT(term.mode, set, MODE_MOUSEBTN);
1249 break;
1250 case 1002:
1251 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1252 break;
1253 case 1049: /* = 1047 and 1048 */
1254 case 47:
1255 case 1047:
1256 if(IS_SET(MODE_ALTSCREEN))
1257 tclearregion(0, 0, term.col-1, term.row-1);
1258 if((set && !IS_SET(MODE_ALTSCREEN)) ||
1259 (!set && IS_SET(MODE_ALTSCREEN))) {
1260 tswapscreen();
1261 }
1262 if(*args != 1049)
1263 break;
1264 /* pass through */
1265 case 1048:
1266 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1267 break;
1268 default:
1269 fprintf(stderr,
1270 "erresc: unknown private set/reset mode %d\n",
1271 *args);
1272 break;
1273 }
1274 } else {
1275 switch(*args) {
1276 case 4:
1277 MODBIT(term.mode, set, MODE_INSERT);
1278 break;
1279 default:
1280 fprintf(stderr,
1281 "erresc: unknown set/reset mode %d\n",
1282 *args);
1283 break;
1284 }
1285 }
1286 }
1287 }
1288 #undef MODBIT
1289
1290
1291 void
1292 csihandle(void) {
1293 switch(csiescseq.mode) {
1294 default:
1295 unknown:
1296 fprintf(stderr, "erresc: unknown csi ");
1297 csidump();
1298 /* die(""); */
1299 break;
1300 case '@': /* ICH -- Insert <n> blank char */
1301 DEFAULT(csiescseq.arg[0], 1);
1302 tinsertblank(csiescseq.arg[0]);
1303 break;
1304 case 'A': /* CUU -- Cursor <n> Up */
1305 case 'e':
1306 DEFAULT(csiescseq.arg[0], 1);
1307 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1308 break;
1309 case 'B': /* CUD -- Cursor <n> Down */
1310 DEFAULT(csiescseq.arg[0], 1);
1311 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1312 break;
1313 case 'C': /* CUF -- Cursor <n> Forward */
1314 case 'a':
1315 DEFAULT(csiescseq.arg[0], 1);
1316 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1317 break;
1318 case 'D': /* CUB -- Cursor <n> Backward */
1319 DEFAULT(csiescseq.arg[0], 1);
1320 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1321 break;
1322 case 'E': /* CNL -- Cursor <n> Down and first col */
1323 DEFAULT(csiescseq.arg[0], 1);
1324 tmoveto(0, term.c.y+csiescseq.arg[0]);
1325 break;
1326 case 'F': /* CPL -- Cursor <n> Up and first col */
1327 DEFAULT(csiescseq.arg[0], 1);
1328 tmoveto(0, term.c.y-csiescseq.arg[0]);
1329 break;
1330 case 'g': /* TBC -- Tabulation clear */
1331 switch (csiescseq.arg[0]) {
1332 case 0: /* clear current tab stop */
1333 term.tabs[term.c.x] = 0;
1334 break;
1335 case 3: /* clear all the tabs */
1336 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1337 break;
1338 default:
1339 goto unknown;
1340 }
1341 break;
1342 case 'G': /* CHA -- Move to <col> */
1343 case '`': /* HPA */
1344 DEFAULT(csiescseq.arg[0], 1);
1345 tmoveto(csiescseq.arg[0]-1, term.c.y);
1346 break;
1347 case 'H': /* CUP -- Move to <row> <col> */
1348 case 'f': /* HVP */
1349 DEFAULT(csiescseq.arg[0], 1);
1350 DEFAULT(csiescseq.arg[1], 1);
1351 tmoveto(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1352 break;
1353 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1354 DEFAULT(csiescseq.arg[0], 1);
1355 while(csiescseq.arg[0]--)
1356 tputtab(1);
1357 break;
1358 case 'J': /* ED -- Clear screen */
1359 sel.bx = -1;
1360 switch(csiescseq.arg[0]) {
1361 case 0: /* below */
1362 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1363 if(term.c.y < term.row-1)
1364 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1365 break;
1366 case 1: /* above */
1367 if(term.c.y > 1)
1368 tclearregion(0, 0, term.col-1, term.c.y-1);
1369 tclearregion(0, term.c.y, term.c.x, term.c.y);
1370 break;
1371 case 2: /* all */
1372 tclearregion(0, 0, term.col-1, term.row-1);
1373 break;
1374 default:
1375 goto unknown;
1376 }
1377 break;
1378 case 'K': /* EL -- Clear line */
1379 switch(csiescseq.arg[0]) {
1380 case 0: /* right */
1381 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1382 break;
1383 case 1: /* left */
1384 tclearregion(0, term.c.y, term.c.x, term.c.y);
1385 break;
1386 case 2: /* all */
1387 tclearregion(0, term.c.y, term.col-1, term.c.y);
1388 break;
1389 }
1390 break;
1391 case 'S': /* SU -- Scroll <n> line up */
1392 DEFAULT(csiescseq.arg[0], 1);
1393 tscrollup(term.top, csiescseq.arg[0]);
1394 break;
1395 case 'T': /* SD -- Scroll <n> line down */
1396 DEFAULT(csiescseq.arg[0], 1);
1397 tscrolldown(term.top, csiescseq.arg[0]);
1398 break;
1399 case 'L': /* IL -- Insert <n> blank lines */
1400 DEFAULT(csiescseq.arg[0], 1);
1401 tinsertblankline(csiescseq.arg[0]);
1402 break;
1403 case 'l': /* RM -- Reset Mode */
1404 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1405 break;
1406 case 'M': /* DL -- Delete <n> lines */
1407 DEFAULT(csiescseq.arg[0], 1);
1408 tdeleteline(csiescseq.arg[0]);
1409 break;
1410 case 'X': /* ECH -- Erase <n> char */
1411 DEFAULT(csiescseq.arg[0], 1);
1412 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
1413 break;
1414 case 'P': /* DCH -- Delete <n> char */
1415 DEFAULT(csiescseq.arg[0], 1);
1416 tdeletechar(csiescseq.arg[0]);
1417 break;
1418 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1419 DEFAULT(csiescseq.arg[0], 1);
1420 while(csiescseq.arg[0]--)
1421 tputtab(0);
1422 break;
1423 case 'd': /* VPA -- Move to <row> */
1424 DEFAULT(csiescseq.arg[0], 1);
1425 tmoveto(term.c.x, csiescseq.arg[0]-1);
1426 break;
1427 case 'h': /* SM -- Set terminal mode */
1428 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1429 break;
1430 case 'm': /* SGR -- Terminal attribute (color) */
1431 tsetattr(csiescseq.arg, csiescseq.narg);
1432 break;
1433 case 'r': /* DECSTBM -- Set Scrolling Region */
1434 if(csiescseq.priv)
1435 goto unknown;
1436 else {
1437 DEFAULT(csiescseq.arg[0], 1);
1438 DEFAULT(csiescseq.arg[1], term.row);
1439 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1440 tmoveto(0, 0);
1441 }
1442 break;
1443 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1444 tcursor(CURSOR_SAVE);
1445 break;
1446 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1447 tcursor(CURSOR_LOAD);
1448 break;
1449 }
1450 }
1451
1452 void
1453 csidump(void) {
1454 int i;
1455 printf("ESC[");
1456 for(i = 0; i < csiescseq.len; i++) {
1457 uint c = csiescseq.buf[i] & 0xff;
1458 if(isprint(c)) putchar(c);
1459 else if(c == '\n') printf("(\\n)");
1460 else if(c == '\r') printf("(\\r)");
1461 else if(c == 0x1b) printf("(\\e)");
1462 else printf("(%02x)", c);
1463 }
1464 putchar('\n');
1465 }
1466
1467 void
1468 csireset(void) {
1469 memset(&csiescseq, 0, sizeof(csiescseq));
1470 }
1471
1472 void
1473 strhandle(void) {
1474 char *p;
1475
1476 /*
1477 * TODO: make this being useful in case of color palette change.
1478 */
1479 strparse();
1480
1481 p = strescseq.buf;
1482
1483 switch(strescseq.type) {
1484 case ']': /* OSC -- Operating System Command */
1485 switch(p[0]) {
1486 case '0':
1487 case '1':
1488 case '2':
1489 /*
1490 * TODO: Handle special chars in string, like umlauts.
1491 */
1492 if(p[1] == ';') {
1493 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1494 }
1495 break;
1496 case ';':
1497 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1498 break;
1499 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1500 break;
1501 default:
1502 fprintf(stderr, "erresc: unknown str ");
1503 strdump();
1504 break;
1505 }
1506 break;
1507 case 'P': /* DSC -- Device Control String */
1508 case '_': /* APC -- Application Program Command */
1509 case '^': /* PM -- Privacy Message */
1510 default:
1511 fprintf(stderr, "erresc: unknown str ");
1512 strdump();
1513 /* die(""); */
1514 break;
1515 }
1516 }
1517
1518 void
1519 strparse(void) {
1520 /*
1521 * TODO: Implement parsing like for CSI when required.
1522 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1523 */
1524 return;
1525 }
1526
1527 void
1528 strdump(void) {
1529 int i;
1530 printf("ESC%c", strescseq.type);
1531 for(i = 0; i < strescseq.len; i++) {
1532 uint c = strescseq.buf[i] & 0xff;
1533 if(isprint(c)) putchar(c);
1534 else if(c == '\n') printf("(\\n)");
1535 else if(c == '\r') printf("(\\r)");
1536 else if(c == 0x1b) printf("(\\e)");
1537 else printf("(%02x)", c);
1538 }
1539 printf("ESC\\\n");
1540 }
1541
1542 void
1543 strreset(void) {
1544 memset(&strescseq, 0, sizeof(strescseq));
1545 }
1546
1547 void
1548 tputtab(bool forward) {
1549 unsigned x = term.c.x;
1550
1551 if(forward) {
1552 if(x == term.col)
1553 return;
1554 for(++x; x < term.col && !term.tabs[x]; ++x)
1555 /* nothing */ ;
1556 } else {
1557 if(x == 0)
1558 return;
1559 for(--x; x > 0 && !term.tabs[x]; --x)
1560 /* nothing */ ;
1561 }
1562 tmoveto(x, term.c.y);
1563 }
1564
1565 void
1566 tputc(char *c) {
1567 char ascii = *c;
1568
1569 if(fileio) {
1570 putc(ascii, fileio);
1571 fflush(fileio);
1572 }
1573
1574 if(term.esc & ESC_START) {
1575 if(term.esc & ESC_CSI) {
1576 csiescseq.buf[csiescseq.len++] = ascii;
1577 if(BETWEEN(ascii, 0x40, 0x7E) || csiescseq.len >= ESC_BUF_SIZ) {
1578 term.esc = 0;
1579 csiparse(), csihandle();
1580 }
1581 } else if(term.esc & ESC_STR) {
1582 switch(ascii) {
1583 case '\033':
1584 term.esc = ESC_START | ESC_STR_END;
1585 break;
1586 case '\a': /* backwards compatibility to xterm */
1587 term.esc = 0;
1588 strhandle();
1589 break;
1590 default:
1591 strescseq.buf[strescseq.len++] = ascii;
1592 if(strescseq.len+1 >= STR_BUF_SIZ) {
1593 term.esc = 0;
1594 strhandle();
1595 }
1596 }
1597 } else if(term.esc & ESC_STR_END) {
1598 term.esc = 0;
1599 if(ascii == '\\')
1600 strhandle();
1601 } else if(term.esc & ESC_ALTCHARSET) {
1602 switch(ascii) {
1603 case '0': /* Line drawing crap */
1604 term.c.attr.mode |= ATTR_GFX;
1605 break;
1606 case 'B': /* Back to regular text */
1607 term.c.attr.mode &= ~ATTR_GFX;
1608 break;
1609 default:
1610 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1611 }
1612 term.esc = 0;
1613 } else {
1614 switch(ascii) {
1615 case '[':
1616 term.esc |= ESC_CSI;
1617 break;
1618 case 'P': /* DCS -- Device Control String */
1619 case '_': /* APC -- Application Program Command */
1620 case '^': /* PM -- Privacy Message */
1621 case ']': /* OSC -- Operating System Command */
1622 strreset();
1623 strescseq.type = ascii;
1624 term.esc |= ESC_STR;
1625 break;
1626 case '(':
1627 term.esc |= ESC_ALTCHARSET;
1628 break;
1629 case 'D': /* IND -- Linefeed */
1630 if(term.c.y == term.bot)
1631 tscrollup(term.top, 1);
1632 else
1633 tmoveto(term.c.x, term.c.y+1);
1634 term.esc = 0;
1635 break;
1636 case 'E': /* NEL -- Next line */
1637 tnewline(1); /* always go to first col */
1638 term.esc = 0;
1639 break;
1640 case 'H': /* HTS -- Horizontal tab stop */
1641 term.tabs[term.c.x] = 1;
1642 term.esc = 0;
1643 break;
1644 case 'M': /* RI -- Reverse index */
1645 if(term.c.y == term.top)
1646 tscrolldown(term.top, 1);
1647 else
1648 tmoveto(term.c.x, term.c.y-1);
1649 term.esc = 0;
1650 break;
1651 case 'c': /* RIS -- Reset to inital state */
1652 treset();
1653 term.esc = 0;
1654 break;
1655 case '=': /* DECPAM -- Application keypad */
1656 term.mode |= MODE_APPKEYPAD;
1657 term.esc = 0;
1658 break;
1659 case '>': /* DECPNM -- Normal keypad */
1660 term.mode &= ~MODE_APPKEYPAD;
1661 term.esc = 0;
1662 break;
1663 case '7': /* DECSC -- Save Cursor */
1664 tcursor(CURSOR_SAVE);
1665 term.esc = 0;
1666 break;
1667 case '8': /* DECRC -- Restore Cursor */
1668 tcursor(CURSOR_LOAD);
1669 term.esc = 0;
1670 break;
1671 case '\\': /* ST -- Stop */
1672 term.esc = 0;
1673 break;
1674 default:
1675 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
1676 (uchar) ascii, isprint(ascii)?ascii:'.');
1677 term.esc = 0;
1678 }
1679 }
1680 } else {
1681 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
1682 sel.bx = -1;
1683 switch(ascii) {
1684 case '\t':
1685 tputtab(1);
1686 break;
1687 case '\b':
1688 tmoveto(term.c.x-1, term.c.y);
1689 break;
1690 case '\r':
1691 tmoveto(0, term.c.y);
1692 break;
1693 case '\f':
1694 case '\v':
1695 case '\n':
1696 /* go to first col if the mode is set */
1697 tnewline(IS_SET(MODE_CRLF));
1698 break;
1699 case '\a':
1700 if(!(xw.state & WIN_FOCUSED))
1701 xseturgency(1);
1702 break;
1703 case '\033':
1704 csireset();
1705 term.esc = ESC_START;
1706 break;
1707 default:
1708 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1709 tnewline(1); /* always go to first col */
1710 tsetchar(c);
1711 if(term.c.x+1 < term.col)
1712 tmoveto(term.c.x+1, term.c.y);
1713 else
1714 term.c.state |= CURSOR_WRAPNEXT;
1715 }
1716 }
1717 }
1718
1719 int
1720 tresize(int col, int row) {
1721 int i, x;
1722 int minrow = MIN(row, term.row);
1723 int mincol = MIN(col, term.col);
1724 int slide = term.c.y - row + 1;
1725
1726 if(col < 1 || row < 1)
1727 return 0;
1728
1729 /* free unneeded rows */
1730 i = 0;
1731 if(slide > 0) {
1732 /* slide screen to keep cursor where we expect it -
1733 * tscrollup would work here, but we can optimize to
1734 * memmove because we're freeing the earlier lines */
1735 for(/* i = 0 */; i < slide; i++) {
1736 free(term.line[i]);
1737 free(term.alt[i]);
1738 }
1739 memmove(term.line, term.line + slide, row * sizeof(Line));
1740 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1741 }
1742 for(i += row; i < term.row; i++) {
1743 free(term.line[i]);
1744 free(term.alt[i]);
1745 }
1746
1747 /* resize to new height */
1748 term.line = realloc(term.line, row * sizeof(Line));
1749 term.alt = realloc(term.alt, row * sizeof(Line));
1750 term.dirty = realloc(term.dirty, row * sizeof(*term.dirty));
1751 term.tabs = realloc(term.tabs, col * sizeof(*term.tabs));
1752
1753 /* resize each row to new width, zero-pad if needed */
1754 for(i = 0; i < minrow; i++) {
1755 term.dirty[i] = 1;
1756 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
1757 term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
1758 for(x = mincol; x < col; x++) {
1759 term.line[i][x].state = 0;
1760 term.alt[i][x].state = 0;
1761 }
1762 }
1763
1764 /* allocate any new rows */
1765 for(/* i == minrow */; i < row; i++) {
1766 term.dirty[i] = 1;
1767 term.line[i] = calloc(col, sizeof(Glyph));
1768 term.alt [i] = calloc(col, sizeof(Glyph));
1769 }
1770 if(col > term.col) {
1771 bool *bp = term.tabs + term.col;
1772
1773 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
1774 while(--bp > term.tabs && !*bp)
1775 /* nothing */ ;
1776 for(bp += TAB; bp < term.tabs + col; bp += TAB)
1777 *bp = 1;
1778 }
1779 /* update terminal size */
1780 term.col = col, term.row = row;
1781 /* make use of the LIMIT in tmoveto */
1782 tmoveto(term.c.x, term.c.y);
1783 /* reset scrolling region */
1784 tsetscroll(0, row-1);
1785
1786 return (slide > 0);
1787 }
1788
1789 void
1790 xresize(int col, int row) {
1791 xw.w = MAX(1, 2*BORDER + col * xw.cw);
1792 xw.h = MAX(1, 2*BORDER + row * xw.ch);
1793 }
1794
1795 void
1796 xloadcols(void) {
1797 int i, r, g, b;
1798 XColor color;
1799 ulong white = WhitePixel(xw.dpy, xw.scr);
1800
1801 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
1802 for(i = 0; i < LEN(colorname); i++) {
1803 if(!colorname[i])
1804 continue;
1805 if(!XAllocNamedColor(xw.dpy, xw.cmap, colorname[i], &color, &color)) {
1806 dc.col[i] = white;
1807 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1808 } else
1809 dc.col[i] = color.pixel;
1810 }
1811
1812 /* load colors [16-255] ; same colors as xterm */
1813 for(i = 16, r = 0; r < 6; r++)
1814 for(g = 0; g < 6; g++)
1815 for(b = 0; b < 6; b++) {
1816 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1817 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1818 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1819 if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
1820 dc.col[i] = white;
1821 fprintf(stderr, "Could not allocate color %d\n", i);
1822 } else
1823 dc.col[i] = color.pixel;
1824 i++;
1825 }
1826
1827 for(r = 0; r < 24; r++, i++) {
1828 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1829 if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
1830 dc.col[i] = white;
1831 fprintf(stderr, "Could not allocate color %d\n", i);
1832 } else
1833 dc.col[i] = color.pixel;
1834 }
1835 }
1836
1837 void
1838 xclear(int x1, int y1, int x2, int y2) {
1839 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
1840 XFillRectangle(xw.dpy, xw.buf, dc.gc,
1841 BORDER + x1 * xw.cw, BORDER + y1 * xw.ch,
1842 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1843 }
1844
1845 void
1846 xhints(void) {
1847 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
1848 XWMHints wm = {.flags = InputHint, .input = 1};
1849 XSizeHints *sizeh = NULL;
1850
1851 sizeh = XAllocSizeHints();
1852 if(xw.isfixed == False) {
1853 sizeh->flags = PSize | PResizeInc | PBaseSize;
1854 sizeh->height = xw.h;
1855 sizeh->width = xw.w;
1856 sizeh->height_inc = xw.ch;
1857 sizeh->width_inc = xw.cw;
1858 sizeh->base_height = 2*BORDER;
1859 sizeh->base_width = 2*BORDER;
1860 } else {
1861 sizeh->flags = PMaxSize | PMinSize;
1862 sizeh->min_width = sizeh->max_width = xw.fw;
1863 sizeh->min_height = sizeh->max_height = xw.fh;
1864 }
1865
1866 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
1867 XFree(sizeh);
1868 }
1869
1870 XFontSet
1871 xinitfont(char *fontstr) {
1872 XFontSet set;
1873 char *def, **missing;
1874 int n;
1875
1876 missing = NULL;
1877 set = XCreateFontSet(xw.dpy, fontstr, &missing, &n, &def);
1878 if(missing) {
1879 while(n--)
1880 fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
1881 XFreeStringList(missing);
1882 }
1883 return set;
1884 }
1885
1886 void
1887 xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing) {
1888 XFontStruct **xfonts;
1889 char **font_names;
1890 int i, n;
1891
1892 *ascent = *descent = *lbearing = *rbearing = 0;
1893 n = XFontsOfFontSet(set, &xfonts, &font_names);
1894 for(i = 0; i < n; i++) {
1895 *ascent = MAX(*ascent, (*xfonts)->ascent);
1896 *descent = MAX(*descent, (*xfonts)->descent);
1897 *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
1898 *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
1899 xfonts++;
1900 }
1901 }
1902
1903 void
1904 initfonts(char *fontstr, char *bfontstr, char *ifontstr) {
1905 if((dc.font.set = xinitfont(fontstr)) == NULL)
1906 die("Can't load font %s\n", fontstr);
1907 if((dc.bfont.set = xinitfont(bfontstr)) == NULL)
1908 die("Can't load bfont %s\n", bfontstr);
1909 if((dc.ifont.set = xinitfont(ifontstr)) == NULL)
1910 die("Can't load ifont %s\n", ifontstr);
1911
1912 xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
1913 &dc.font.lbearing, &dc.font.rbearing);
1914 xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
1915 &dc.bfont.lbearing, &dc.bfont.rbearing);
1916 xgetfontinfo(dc.ifont.set, &dc.ifont.ascent, &dc.ifont.descent,
1917 &dc.ifont.lbearing, &dc.ifont.rbearing);
1918 }
1919
1920 void
1921 xinit(void) {
1922 XSetWindowAttributes attrs;
1923 Cursor cursor;
1924 Window parent;
1925 int sw, sh;
1926
1927 if(!(xw.dpy = XOpenDisplay(NULL)))
1928 die("Can't open display\n");
1929 xw.scr = XDefaultScreen(xw.dpy);
1930
1931 /* adjust fixed window geometry */
1932 if(xw.isfixed) {
1933 sw = DisplayWidth(xw.dpy, xw.scr);
1934 sh = DisplayHeight(xw.dpy, xw.scr);
1935 if(xw.fx < 0)
1936 xw.fx = sw + xw.fx - xw.fw - 1;
1937 if(xw.fy < 0)
1938 xw.fy = sh + xw.fy - xw.fh - 1;
1939
1940 xw.h = xw.fh;
1941 xw.w = xw.fw;
1942 } else {
1943 /* window - default size */
1944 xw.h = 2*BORDER + term.row * xw.ch;
1945 xw.w = 2*BORDER + term.col * xw.cw;
1946 xw.fx = 0;
1947 xw.fy = 0;
1948 }
1949
1950 /* font */
1951 initfonts(FONT, BOLDFONT, ITALICFONT);
1952
1953 /* XXX: Assuming same size for bold font */
1954 xw.cw = dc.font.rbearing - dc.font.lbearing;
1955 xw.ch = dc.font.ascent + dc.font.descent;
1956
1957 /* colors */
1958 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1959 xloadcols();
1960
1961 attrs.background_pixel = dc.col[DefaultBG];
1962 attrs.border_pixel = dc.col[DefaultBG];
1963 attrs.bit_gravity = NorthWestGravity;
1964 attrs.event_mask = FocusChangeMask | KeyPressMask
1965 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1966 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
1967 attrs.colormap = xw.cmap;
1968
1969 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
1970 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
1971 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
1972 XDefaultVisual(xw.dpy, xw.scr),
1973 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
1974 | CWColormap,
1975 &attrs);
1976 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
1977
1978
1979 /* input methods */
1980 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
1981 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
1982 | XIMStatusNothing, XNClientWindow, xw.win,
1983 XNFocusWindow, xw.win, NULL);
1984 /* gc */
1985 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
1986
1987 /* white cursor, black outline */
1988 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
1989 XDefineCursor(xw.dpy, xw.win, cursor);
1990 XRecolorCursor(xw.dpy, cursor,
1991 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
1992 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
1993
1994 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
1995
1996 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
1997 XMapWindow(xw.dpy, xw.win);
1998 xhints();
1999 XSync(xw.dpy, 0);
2000 }
2001
2002 void
2003 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2004 int fg = base.fg, bg = base.bg, temp;
2005 int winx = BORDER+x*xw.cw, winy = BORDER+y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
2006 XFontSet fontset = dc.font.set;
2007 int i;
2008
2009 /* only switch default fg/bg if term is in RV mode */
2010 if(IS_SET(MODE_REVERSE)) {
2011 if(fg == DefaultFG)
2012 fg = DefaultBG;
2013 if(bg == DefaultBG)
2014 bg = DefaultFG;
2015 }
2016
2017 if(base.mode & ATTR_REVERSE)
2018 temp = fg, fg = bg, bg = temp;
2019
2020 if(base.mode & ATTR_BOLD) {
2021 fg += 8;
2022 fontset = dc.bfont.set;
2023 }
2024
2025 if(base.mode & ATTR_ITALIC)
2026 fontset = dc.ifont.set;
2027
2028 XSetBackground(xw.dpy, dc.gc, dc.col[bg]);
2029 XSetForeground(xw.dpy, dc.gc, dc.col[fg]);
2030
2031 if(base.mode & ATTR_GFX) {
2032 for(i = 0; i < bytelen; i++) {
2033 char c = gfx[(uint)s[i] % 256];
2034 if(c)
2035 s[i] = c;
2036 else if(s[i] > 0x5f)
2037 s[i] -= 0x5f;
2038 }
2039 }
2040
2041 XmbDrawImageString(xw.dpy, xw.buf, fontset, dc.gc, winx, winy, s, bytelen);
2042
2043 if(base.mode & ATTR_UNDERLINE)
2044 XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
2045 }
2046
2047 /* copy buffer pixmap to screen pixmap */
2048 void
2049 xcopy() {
2050 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2051 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2052 }
2053
2054 void
2055 xdrawcursor(void) {
2056 static int oldx = 0;
2057 static int oldy = 0;
2058 int sl;
2059 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
2060
2061 LIMIT(oldx, 0, term.col-1);
2062 LIMIT(oldy, 0, term.row-1);
2063
2064 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2065 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2066
2067 /* remove the old cursor */
2068 if(term.line[oldy][oldx].state & GLYPH_SET) {
2069 sl = utf8size(term.line[oldy][oldx].c);
2070 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
2071 } else
2072 xclear(oldx, oldy, oldx, oldy);
2073
2074 xcopy();
2075
2076 /* draw the new one */
2077 if(!(term.c.state & CURSOR_HIDE)) {
2078 if(!(xw.state & WIN_FOCUSED))
2079 g.bg = DefaultUCS;
2080
2081 if(IS_SET(MODE_REVERSE))
2082 g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
2083
2084 sl = utf8size(g.c);
2085 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2086 oldx = term.c.x, oldy = term.c.y;
2087 }
2088
2089 xcopy();
2090 }
2091
2092 void
2093 redraw(void) {
2094 struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
2095 tfulldirt();
2096 draw();
2097 nanosleep(&tv, NULL);
2098 }
2099
2100 void
2101 draw() {
2102 drawregion(0, 0, term.col, term.row);
2103 xcopy();
2104 gettimeofday(&xw.lastdraw, NULL);
2105 }
2106
2107 void
2108 drawregion(int x1, int y1, int x2, int y2) {
2109 int ic, ib, x, y, ox, sl;
2110 Glyph base, new;
2111 char buf[DRAW_BUF_SIZ];
2112 bool ena_sel = sel.bx != -1, alt = IS_SET(MODE_ALTSCREEN);
2113
2114 if((sel.alt && !alt) || (!sel.alt && alt))
2115 ena_sel = 0;
2116 if(!(xw.state & WIN_VISIBLE))
2117 return;
2118
2119 for(y = y1; y < y2; y++) {
2120 if(!term.dirty[y])
2121 continue;
2122 xclear(0, y, term.col, y);
2123 term.dirty[y] = 0;
2124 base = term.line[y][0];
2125 ic = ib = ox = 0;
2126 for(x = x1; x < x2; x++) {
2127 new = term.line[y][x];
2128 if(ena_sel && *(new.c) && selected(x, y))
2129 new.mode ^= ATTR_REVERSE;
2130 if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
2131 ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2132 xdraws(buf, base, ox, y, ic, ib);
2133 ic = ib = 0;
2134 }
2135 if(new.state & GLYPH_SET) {
2136 if(ib == 0) {
2137 ox = x;
2138 base = new;
2139 }
2140 sl = utf8size(new.c);
2141 memcpy(buf+ib, new.c, sl);
2142 ib += sl;
2143 ++ic;
2144 }
2145 }
2146 if(ib > 0)
2147 xdraws(buf, base, ox, y, ic, ib);
2148 }
2149 xdrawcursor();
2150 }
2151
2152 void
2153 expose(XEvent *ev) {
2154 XExposeEvent *e = &ev->xexpose;
2155 if(xw.state & WIN_REDRAW) {
2156 if(!e->count)
2157 xw.state &= ~WIN_REDRAW;
2158 }
2159 xcopy();
2160 }
2161
2162 void
2163 visibility(XEvent *ev) {
2164 XVisibilityEvent *e = &ev->xvisibility;
2165 if(e->state == VisibilityFullyObscured)
2166 xw.state &= ~WIN_VISIBLE;
2167 else if(!(xw.state & WIN_VISIBLE))
2168 /* need a full redraw for next Expose, not just a buf copy */
2169 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2170 }
2171
2172 void
2173 unmap(XEvent *ev) {
2174 xw.state &= ~WIN_VISIBLE;
2175 }
2176
2177 void
2178 xseturgency(int add) {
2179 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2180 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2181 XSetWMHints(xw.dpy, xw.win, h);
2182 XFree(h);
2183 }
2184
2185 void
2186 focus(XEvent *ev) {
2187 if(ev->type == FocusIn) {
2188 xw.state |= WIN_FOCUSED;
2189 xseturgency(0);
2190 } else
2191 xw.state &= ~WIN_FOCUSED;
2192 draw();
2193 }
2194
2195 char*
2196 kmap(KeySym k, uint state) {
2197 int i;
2198 state &= ~Mod2Mask;
2199 for(i = 0; i < LEN(key); i++) {
2200 uint mask = key[i].mask;
2201 if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
2202 return (char*)key[i].s;
2203 }
2204 return NULL;
2205 }
2206
2207 void
2208 kpress(XEvent *ev) {
2209 XKeyEvent *e = &ev->xkey;
2210 KeySym ksym;
2211 char buf[32];
2212 char *customkey;
2213 int len;
2214 int meta;
2215 int shift;
2216 Status status;
2217
2218 meta = e->state & Mod1Mask;
2219 shift = e->state & ShiftMask;
2220 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
2221
2222 /* 1. custom keys from config.h */
2223 if((customkey = kmap(ksym, e->state)))
2224 ttywrite(customkey, strlen(customkey));
2225 /* 2. hardcoded (overrides X lookup) */
2226 else
2227 switch(ksym) {
2228 case XK_Up:
2229 case XK_Down:
2230 case XK_Left:
2231 case XK_Right:
2232 /* XXX: shift up/down doesn't work */
2233 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
2234 ttywrite(buf, 3);
2235 break;
2236 case XK_Insert:
2237 if(shift)
2238 selpaste();
2239 break;
2240 case XK_Return:
2241 if(IS_SET(MODE_CRLF))
2242 ttywrite("\r\n", 2);
2243 else
2244 ttywrite("\r", 1);
2245 break;
2246 /* 3. X lookup */
2247 default:
2248 if(len > 0) {
2249 if(meta && len == 1)
2250 ttywrite("\033", 1);
2251 ttywrite(buf, len);
2252 }
2253 break;
2254 }
2255 }
2256
2257 void
2258 cmessage(XEvent *e) {
2259 /* See xembed specs
2260 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2261 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2262 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2263 xw.state |= WIN_FOCUSED;
2264 xseturgency(0);
2265 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2266 xw.state &= ~WIN_FOCUSED;
2267 }
2268 draw();
2269 }
2270 }
2271
2272 void
2273 resize(XEvent *e) {
2274 int col, row;
2275
2276 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2277 return;
2278
2279 xw.w = e->xconfigure.width;
2280 xw.h = e->xconfigure.height;
2281 col = (xw.w - 2*BORDER) / xw.cw;
2282 row = (xw.h - 2*BORDER) / xw.ch;
2283 if(col == term.col && row == term.row)
2284 return;
2285 if(tresize(col, row))
2286 draw();
2287 xresize(col, row);
2288 ttyresize(col, row);
2289 }
2290
2291 bool
2292 last_draw_too_old(void) {
2293 struct timeval now;
2294 gettimeofday(&now, NULL);
2295 return TIMEDIFF(now, xw.lastdraw) >= DRAW_TIMEOUT/1000;
2296 }
2297
2298 void
2299 run(void) {
2300 XEvent ev;
2301 fd_set rfd;
2302 int xfd = XConnectionNumber(xw.dpy);
2303 struct timeval timeout = {0};
2304 bool stuff_to_print = 0;
2305
2306 for(;;) {
2307 FD_ZERO(&rfd);
2308 FD_SET(cmdfd, &rfd);
2309 FD_SET(xfd, &rfd);
2310 timeout.tv_sec = 0;
2311 timeout.tv_usec = SELECT_TIMEOUT;
2312 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, &timeout) < 0) {
2313 if(errno == EINTR)
2314 continue;
2315 die("select failed: %s\n", SERRNO);
2316 }
2317 if(FD_ISSET(cmdfd, &rfd)) {
2318 ttyread();
2319 stuff_to_print = 1;
2320 }
2321
2322 if(stuff_to_print && last_draw_too_old()) {
2323 stuff_to_print = 0;
2324 draw();
2325 }
2326
2327 while(XPending(xw.dpy)) {
2328 XNextEvent(xw.dpy, &ev);
2329 if(XFilterEvent(&ev, xw.win))
2330 continue;
2331 if(handler[ev.type])
2332 (handler[ev.type])(&ev);
2333 }
2334 }
2335 }
2336
2337 int
2338 main(int argc, char *argv[]) {
2339 int i, bitm, xr, yr;
2340 unsigned int wr, hr;
2341
2342 xw.fw = xw.fh = xw.fx = xw.fy = 0;
2343 xw.isfixed = False;
2344
2345 for(i = 1; i < argc; i++) {
2346 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2347 case 't':
2348 if(++i < argc) opt_title = argv[i];
2349 break;
2350 case 'c':
2351 if(++i < argc) opt_class = argv[i];
2352 break;
2353 case 'w':
2354 if(++i < argc) opt_embed = argv[i];
2355 break;
2356 case 'f':
2357 if(++i < argc) opt_io = argv[i];
2358 break;
2359 case 'e':
2360 /* eat every remaining arguments */
2361 if(++i < argc) opt_cmd = &argv[i];
2362 goto run;
2363 case 'g':
2364 if(++i >= argc)
2365 break;
2366
2367 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
2368 if(bitm & XValue)
2369 xw.fx = xr;
2370 if(bitm & YValue)
2371 xw.fy = yr;
2372 if(bitm & WidthValue)
2373 xw.fw = (int)wr;
2374 if(bitm & HeightValue)
2375 xw.fh = (int)hr;
2376 if(bitm & XNegative && xw.fx == 0)
2377 xw.fx = -1;
2378 if(bitm & XNegative && xw.fy == 0)
2379 xw.fy = -1;
2380
2381 if(xw.fh != 0 && xw.fw != 0)
2382 xw.isfixed = True;
2383 break;
2384 case 'v':
2385 default:
2386 die(USAGE);
2387 }
2388 }
2389
2390 run:
2391 setlocale(LC_CTYPE, "");
2392 tnew(80, 24);
2393 ttynew();
2394 xinit();
2395 selinit();
2396 run();
2397 return 0;
2398 }
2399