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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 draw();
623 }
624
625 void
626 selrequest(XEvent *e) {
627 XSelectionRequestEvent *xsre;
628 XSelectionEvent xev;
629 Atom xa_targets;
630
631 xsre = (XSelectionRequestEvent *) e;
632 xev.type = SelectionNotify;
633 xev.requestor = xsre->requestor;
634 xev.selection = xsre->selection;
635 xev.target = xsre->target;
636 xev.time = xsre->time;
637 /* reject */
638 xev.property = None;
639
640 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
641 if(xsre->target == xa_targets) {
642 /* respond with the supported type */
643 Atom string = sel.xtarget;
644 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
645 XA_ATOM, 32, PropModeReplace,
646 (uchar *) &string, 1);
647 xev.property = xsre->property;
648 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
649 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
650 xsre->target, 8, PropModeReplace,
651 (uchar *) sel.clip, strlen(sel.clip));
652 xev.property = xsre->property;
653 }
654
655 /* all done, send a notification to the listener */
656 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
657 fprintf(stderr, "Error sending SelectionNotify event\n");
658 }
659
660 void
661 xsetsel(char *str) {
662 /* register the selection for both the clipboard and the primary */
663 Atom clipboard;
664
665 free(sel.clip);
666 sel.clip = str;
667
668 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
669
670 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
671 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
672
673 XFlush(xw.dpy);
674 }
675
676 void
677 brelease(XEvent *e) {
678 if(IS_SET(MODE_MOUSE)) {
679 mousereport(e);
680 return;
681 }
682 if(e->xbutton.button == Button2)
683 selpaste();
684 else if(e->xbutton.button == Button1) {
685 sel.mode = 0;
686 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
687 term.dirty[sel.ey] = 1;
688 if(sel.bx == sel.ex && sel.by == sel.ey) {
689 struct timeval now;
690 sel.bx = -1;
691 gettimeofday(&now, NULL);
692
693 if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
694 /* triple click on the line */
695 sel.b.x = sel.bx = 0;
696 sel.e.x = sel.ex = term.col;
697 sel.b.y = sel.e.y = sel.ey;
698 selcopy();
699 } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
700 /* double click to select word */
701 sel.bx = sel.ex;
702 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
703 term.line[sel.ey][sel.bx-1].c[0] != ' ') sel.bx--;
704 sel.b.x = sel.bx;
705 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
706 term.line[sel.ey][sel.ex+1].c[0] != ' ') sel.ex++;
707 sel.e.x = sel.ex;
708 sel.b.y = sel.e.y = sel.ey;
709 selcopy();
710 }
711 } else
712 selcopy();
713 }
714 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
715 gettimeofday(&sel.tclick1, NULL);
716 draw();
717 }
718
719 void
720 bmotion(XEvent *e) {
721 if(IS_SET(MODE_MOUSE)) {
722 mousereport(e);
723 return;
724 }
725 if(sel.mode) {
726 int oldey = sel.ey, oldex = sel.ex;
727 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
728
729 if(oldey != sel.ey || oldex != sel.ex) {
730 int starty = MIN(oldey, sel.ey);
731 int endy = MAX(oldey, sel.ey);
732 tsetdirt(starty, endy);
733 draw();
734 }
735 }
736 }
737
738 void
739 die(const char *errstr, ...) {
740 va_list ap;
741
742 va_start(ap, errstr);
743 vfprintf(stderr, errstr, ap);
744 va_end(ap);
745 exit(EXIT_FAILURE);
746 }
747
748 void
749 execsh(void) {
750 char **args;
751 char *envshell = getenv("SHELL");
752
753 unsetenv("COLUMNS");
754 unsetenv("LINES");
755 unsetenv("TERMCAP");
756
757 DEFAULT(envshell, SHELL);
758 putenv("TERM="TNAME);
759 args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
760 execvp(args[0], args);
761 exit(EXIT_FAILURE);
762 }
763
764 void
765 sigchld(int a) {
766 int stat = 0;
767 if(waitpid(pid, &stat, 0) < 0)
768 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
769 if(WIFEXITED(stat))
770 exit(WEXITSTATUS(stat));
771 else
772 exit(EXIT_FAILURE);
773 }
774
775 void
776 ttynew(void) {
777 int m, s;
778
779 /* seems to work fine on linux, openbsd and freebsd */
780 struct winsize w = {term.row, term.col, 0, 0};
781 if(openpty(&m, &s, NULL, NULL, &w) < 0)
782 die("openpty failed: %s\n", SERRNO);
783
784 switch(pid = fork()) {
785 case -1:
786 die("fork failed\n");
787 break;
788 case 0:
789 setsid(); /* create a new process group */
790 dup2(s, STDIN_FILENO);
791 dup2(s, STDOUT_FILENO);
792 dup2(s, STDERR_FILENO);
793 if(ioctl(s, TIOCSCTTY, NULL) < 0)
794 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
795 close(s);
796 close(m);
797 execsh();
798 break;
799 default:
800 close(s);
801 cmdfd = m;
802 signal(SIGCHLD, sigchld);
803 if(opt_io) {
804 if(!strcmp(opt_io, "-")) {
805 fileio = stdout;
806 } else {
807 if(!(fileio = fopen(opt_io, "w"))) {
808 fprintf(stderr, "Error opening %s:%s\n",
809 opt_io, strerror(errno));
810 }
811 }
812 }
813 }
814 }
815
816 void
817 dump(char c) {
818 static int col;
819 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
820 if(++col % 10 == 0)
821 fprintf(stderr, "\n");
822 }
823
824 void
825 ttyread(void) {
826 static char buf[BUFSIZ];
827 static int buflen = 0;
828 char *ptr;
829 char s[UTF_SIZ];
830 int charsize; /* size of utf8 char in bytes */
831 long utf8c;
832 int ret;
833
834 /* append read bytes to unprocessed bytes */
835 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
836 die("Couldn't read from shell: %s\n", SERRNO);
837
838 /* process every complete utf8 char */
839 buflen += ret;
840 ptr = buf;
841 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
842 charsize = utf8decode(ptr, &utf8c);
843 utf8encode(&utf8c, s);
844 tputc(s);
845 ptr += charsize;
846 buflen -= charsize;
847 }
848
849 /* keep any uncomplete utf8 char for the next call */
850 memmove(buf, ptr, buflen);
851 }
852
853 void
854 ttywrite(const char *s, size_t n) {
855 if(write(cmdfd, s, n) == -1)
856 die("write error on tty: %s\n", SERRNO);
857 }
858
859 void
860 ttyresize(int x, int y) {
861 struct winsize w;
862
863 w.ws_row = term.row;
864 w.ws_col = term.col;
865 w.ws_xpixel = xw.w;
866 w.ws_ypixel = xw.h;
867 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
868 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
869 }
870
871 void
872 tsetdirt(int top, int bot)
873 {
874 int i;
875
876 LIMIT(top, 0, term.row-1);
877 LIMIT(bot, 0, term.row-1);
878
879 for(i = top; i <= bot; i++)
880 term.dirty[i] = 1;
881 }
882
883 void
884 tfulldirt(void)
885 {
886 tsetdirt(0, term.row-1);
887 }
888
889 void
890 tcursor(int mode) {
891 static TCursor c;
892
893 if(mode == CURSOR_SAVE)
894 c = term.c;
895 else if(mode == CURSOR_LOAD)
896 term.c = c, tmoveto(c.x, c.y);
897 }
898
899 void
900 treset(void) {
901 unsigned i;
902 term.c = (TCursor){{
903 .mode = ATTR_NULL,
904 .fg = DefaultFG,
905 .bg = DefaultBG
906 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
907
908 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
909 for(i = TAB; i < term.col; i += TAB)
910 term.tabs[i] = 1;
911 term.top = 0, term.bot = term.row - 1;
912 term.mode = MODE_WRAP;
913 tclearregion(0, 0, term.col-1, term.row-1);
914 }
915
916 void
917 tnew(int col, int row) {
918 /* set screen size */
919 term.row = row, term.col = col;
920 term.line = malloc(term.row * sizeof(Line));
921 term.alt = malloc(term.row * sizeof(Line));
922 term.dirty = malloc(term.row * sizeof(*term.dirty));
923 term.tabs = malloc(term.col * sizeof(*term.tabs));
924
925 for(row = 0; row < term.row; row++) {
926 term.line[row] = malloc(term.col * sizeof(Glyph));
927 term.alt [row] = malloc(term.col * sizeof(Glyph));
928 term.dirty[row] = 0;
929 }
930 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
931 /* setup screen */
932 treset();
933 }
934
935 void
936 tswapscreen(void) {
937 Line* tmp = term.line;
938 term.line = term.alt;
939 term.alt = tmp;
940 term.mode ^= MODE_ALTSCREEN;
941 tfulldirt();
942 }
943
944 void
945 tscrolldown(int orig, int n) {
946 int i;
947 Line temp;
948
949 LIMIT(n, 0, term.bot-orig+1);
950
951 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
952
953 for(i = term.bot; i >= orig+n; i--) {
954 temp = term.line[i];
955 term.line[i] = term.line[i-n];
956 term.line[i-n] = temp;
957
958 term.dirty[i] = 1;
959 term.dirty[i-n] = 1;
960 }
961
962 selscroll(orig, n);
963 }
964
965 void
966 tscrollup(int orig, int n) {
967 int i;
968 Line temp;
969 LIMIT(n, 0, term.bot-orig+1);
970
971 tclearregion(0, orig, term.col-1, orig+n-1);
972
973 for(i = orig; i <= term.bot-n; i++) {
974 temp = term.line[i];
975 term.line[i] = term.line[i+n];
976 term.line[i+n] = temp;
977
978 term.dirty[i] = 1;
979 term.dirty[i+n] = 1;
980 }
981
982 selscroll(orig, -n);
983 }
984
985 void
986 selscroll(int orig, int n) {
987 if(sel.bx == -1)
988 return;
989
990 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
991 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
992 sel.bx = -1;
993 return;
994 }
995 if(sel.by < term.top) {
996 sel.by = term.top;
997 sel.bx = 0;
998 }
999 if(sel.ey > term.bot) {
1000 sel.ey = term.bot;
1001 sel.ex = term.col;
1002 }
1003 sel.b.y = sel.by, sel.b.x = sel.bx;
1004 sel.e.y = sel.ey, sel.e.x = sel.ex;
1005 }
1006 }
1007
1008 void
1009 tnewline(int first_col) {
1010 int y = term.c.y;
1011 if(y == term.bot)
1012 tscrollup(term.top, 1);
1013 else
1014 y++;
1015 tmoveto(first_col ? 0 : term.c.x, y);
1016 }
1017
1018 void
1019 csiparse(void) {
1020 /* int noarg = 1; */
1021 char *p = csiescseq.buf;
1022
1023 csiescseq.narg = 0;
1024 if(*p == '?')
1025 csiescseq.priv = 1, p++;
1026
1027 while(p < csiescseq.buf+csiescseq.len) {
1028 while(isdigit(*p)) {
1029 csiescseq.arg[csiescseq.narg] *= 10;
1030 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1031 }
1032 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ)
1033 csiescseq.narg++, p++;
1034 else {
1035 csiescseq.mode = *p;
1036 csiescseq.narg++;
1037 return;
1038 }
1039 }
1040 }
1041
1042 void
1043 tmoveto(int x, int y) {
1044 LIMIT(x, 0, term.col-1);
1045 LIMIT(y, 0, term.row-1);
1046 term.c.state &= ~CURSOR_WRAPNEXT;
1047 term.c.x = x;
1048 term.c.y = y;
1049 }
1050
1051 void
1052 tsetchar(char *c) {
1053 term.dirty[term.c.y] = 1;
1054 term.line[term.c.y][term.c.x] = term.c.attr;
1055 memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
1056 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
1057 }
1058
1059 void
1060 tclearregion(int x1, int y1, int x2, int y2) {
1061 int x, y, temp;
1062
1063 if(x1 > x2)
1064 temp = x1, x1 = x2, x2 = temp;
1065 if(y1 > y2)
1066 temp = y1, y1 = y2, y2 = temp;
1067
1068 LIMIT(x1, 0, term.col-1);
1069 LIMIT(x2, 0, term.col-1);
1070 LIMIT(y1, 0, term.row-1);
1071 LIMIT(y2, 0, term.row-1);
1072
1073 for(y = y1; y <= y2; y++) {
1074 term.dirty[y] = 1;
1075 for(x = x1; x <= x2; x++)
1076 term.line[y][x].state = 0;
1077 }
1078 }
1079
1080 void
1081 tdeletechar(int n) {
1082 int src = term.c.x + n;
1083 int dst = term.c.x;
1084 int size = term.col - src;
1085
1086 term.dirty[term.c.y] = 1;
1087
1088 if(src >= term.col) {
1089 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1090 return;
1091 }
1092 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1093 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1094 }
1095
1096 void
1097 tinsertblank(int n) {
1098 int src = term.c.x;
1099 int dst = src + n;
1100 int size = term.col - dst;
1101
1102 term.dirty[term.c.y] = 1;
1103
1104 if(dst >= term.col) {
1105 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1106 return;
1107 }
1108 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1109 tclearregion(src, term.c.y, dst - 1, term.c.y);
1110 }
1111
1112 void
1113 tinsertblankline(int n) {
1114 if(term.c.y < term.top || term.c.y > term.bot)
1115 return;
1116
1117 tscrolldown(term.c.y, n);
1118 }
1119
1120 void
1121 tdeleteline(int n) {
1122 if(term.c.y < term.top || term.c.y > term.bot)
1123 return;
1124
1125 tscrollup(term.c.y, n);
1126 }
1127
1128 void
1129 tsetattr(int *attr, int l) {
1130 int i;
1131
1132 for(i = 0; i < l; i++) {
1133 switch(attr[i]) {
1134 case 0:
1135 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1136 | ATTR_ITALIC);
1137 term.c.attr.fg = DefaultFG;
1138 term.c.attr.bg = DefaultBG;
1139 break;
1140 case 1:
1141 term.c.attr.mode |= ATTR_BOLD;
1142 break;
1143 case 3: /* enter standout (highlight) */
1144 term.c.attr.mode |= ATTR_ITALIC;
1145 break;
1146 case 4:
1147 term.c.attr.mode |= ATTR_UNDERLINE;
1148 break;
1149 case 7:
1150 term.c.attr.mode |= ATTR_REVERSE;
1151 break;
1152 case 22:
1153 term.c.attr.mode &= ~ATTR_BOLD;
1154 break;
1155 case 23: /* leave standout (highlight) mode */
1156 term.c.attr.mode &= ~ATTR_ITALIC;
1157 break;
1158 case 24:
1159 term.c.attr.mode &= ~ATTR_UNDERLINE;
1160 break;
1161 case 27:
1162 term.c.attr.mode &= ~ATTR_REVERSE;
1163 break;
1164 case 38:
1165 if(i + 2 < l && attr[i + 1] == 5) {
1166 i += 2;
1167 if(BETWEEN(attr[i], 0, 255))
1168 term.c.attr.fg = attr[i];
1169 else
1170 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
1171 }
1172 else
1173 fprintf(stderr, "erresc(38): gfx attr %d unknown\n", attr[i]);
1174 break;
1175 case 39:
1176 term.c.attr.fg = DefaultFG;
1177 break;
1178 case 48:
1179 if(i + 2 < l && attr[i + 1] == 5) {
1180 i += 2;
1181 if(BETWEEN(attr[i], 0, 255))
1182 term.c.attr.bg = attr[i];
1183 else
1184 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
1185 }
1186 else
1187 fprintf(stderr, "erresc(48): gfx attr %d unknown\n", attr[i]);
1188 break;
1189 case 49:
1190 term.c.attr.bg = DefaultBG;
1191 break;
1192 default:
1193 if(BETWEEN(attr[i], 30, 37))
1194 term.c.attr.fg = attr[i] - 30;
1195 else if(BETWEEN(attr[i], 40, 47))
1196 term.c.attr.bg = attr[i] - 40;
1197 else if(BETWEEN(attr[i], 90, 97))
1198 term.c.attr.fg = attr[i] - 90 + 8;
1199 else if(BETWEEN(attr[i], 100, 107))
1200 term.c.attr.fg = attr[i] - 100 + 8;
1201 else
1202 fprintf(stderr, "erresc(default): gfx attr %d unknown\n", attr[i]), csidump();
1203 break;
1204 }
1205 }
1206 }
1207
1208 void
1209 tsetscroll(int t, int b) {
1210 int temp;
1211
1212 LIMIT(t, 0, term.row-1);
1213 LIMIT(b, 0, term.row-1);
1214 if(t > b) {
1215 temp = t;
1216 t = b;
1217 b = temp;
1218 }
1219 term.top = t;
1220 term.bot = b;
1221 }
1222
1223 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1224
1225 void
1226 tsetmode(bool priv, bool set, int *args, int narg) {
1227 int *lim, mode;
1228
1229 for(lim = args + narg; args < lim; ++args) {
1230 if(priv) {
1231 switch(*args) {
1232 case 1:
1233 MODBIT(term.mode, set, MODE_APPKEYPAD);
1234 break;
1235 case 5: /* DECSCNM -- Reverve video */
1236 mode = term.mode;
1237 MODBIT(term.mode,set, MODE_REVERSE);
1238 if(mode != term.mode)
1239 redraw();
1240 break;
1241 case 7:
1242 MODBIT(term.mode, set, MODE_WRAP);
1243 break;
1244 case 20:
1245 MODBIT(term.mode, set, MODE_CRLF);
1246 break;
1247 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1248 break;
1249 case 25:
1250 MODBIT(term.c.state, !set, CURSOR_HIDE);
1251 break;
1252 case 1000: /* 1000,1002: enable xterm mouse report */
1253 MODBIT(term.mode, set, MODE_MOUSEBTN);
1254 break;
1255 case 1002:
1256 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1257 break;
1258 case 1049: /* = 1047 and 1048 */
1259 case 47:
1260 case 1047:
1261 if(IS_SET(MODE_ALTSCREEN))
1262 tclearregion(0, 0, term.col-1, term.row-1);
1263 if((set && !IS_SET(MODE_ALTSCREEN)) ||
1264 (!set && IS_SET(MODE_ALTSCREEN))) {
1265 tswapscreen();
1266 }
1267 if(*args != 1049)
1268 break;
1269 /* pass through */
1270 case 1048:
1271 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1272 break;
1273 default:
1274 fprintf(stderr,
1275 "erresc: unknown private set/reset mode %d\n",
1276 *args);
1277 break;
1278 }
1279 } else {
1280 switch(*args) {
1281 case 4:
1282 MODBIT(term.mode, set, MODE_INSERT);
1283 break;
1284 default:
1285 fprintf(stderr,
1286 "erresc: unknown set/reset mode %d\n",
1287 *args);
1288 break;
1289 }
1290 }
1291 }
1292 }
1293 #undef MODBIT
1294
1295
1296 void
1297 csihandle(void) {
1298 switch(csiescseq.mode) {
1299 default:
1300 unknown:
1301 fprintf(stderr, "erresc: unknown csi ");
1302 csidump();
1303 /* die(""); */
1304 break;
1305 case '@': /* ICH -- Insert <n> blank char */
1306 DEFAULT(csiescseq.arg[0], 1);
1307 tinsertblank(csiescseq.arg[0]);
1308 break;
1309 case 'A': /* CUU -- Cursor <n> Up */
1310 case 'e':
1311 DEFAULT(csiescseq.arg[0], 1);
1312 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1313 break;
1314 case 'B': /* CUD -- Cursor <n> Down */
1315 DEFAULT(csiescseq.arg[0], 1);
1316 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1317 break;
1318 case 'C': /* CUF -- Cursor <n> Forward */
1319 case 'a':
1320 DEFAULT(csiescseq.arg[0], 1);
1321 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1322 break;
1323 case 'D': /* CUB -- Cursor <n> Backward */
1324 DEFAULT(csiescseq.arg[0], 1);
1325 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1326 break;
1327 case 'E': /* CNL -- Cursor <n> Down and first col */
1328 DEFAULT(csiescseq.arg[0], 1);
1329 tmoveto(0, term.c.y+csiescseq.arg[0]);
1330 break;
1331 case 'F': /* CPL -- Cursor <n> Up and first col */
1332 DEFAULT(csiescseq.arg[0], 1);
1333 tmoveto(0, term.c.y-csiescseq.arg[0]);
1334 break;
1335 case 'g': /* TBC -- Tabulation clear */
1336 switch (csiescseq.arg[0]) {
1337 case 0: /* clear current tab stop */
1338 term.tabs[term.c.x] = 0;
1339 break;
1340 case 3: /* clear all the tabs */
1341 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1342 break;
1343 default:
1344 goto unknown;
1345 }
1346 break;
1347 case 'G': /* CHA -- Move to <col> */
1348 case '`': /* HPA */
1349 DEFAULT(csiescseq.arg[0], 1);
1350 tmoveto(csiescseq.arg[0]-1, term.c.y);
1351 break;
1352 case 'H': /* CUP -- Move to <row> <col> */
1353 case 'f': /* HVP */
1354 DEFAULT(csiescseq.arg[0], 1);
1355 DEFAULT(csiescseq.arg[1], 1);
1356 tmoveto(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1357 break;
1358 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1359 DEFAULT(csiescseq.arg[0], 1);
1360 while(csiescseq.arg[0]--)
1361 tputtab(1);
1362 break;
1363 case 'J': /* ED -- Clear screen */
1364 sel.bx = -1;
1365 switch(csiescseq.arg[0]) {
1366 case 0: /* below */
1367 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1368 if(term.c.y < term.row-1)
1369 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1370 break;
1371 case 1: /* above */
1372 if(term.c.y > 1)
1373 tclearregion(0, 0, term.col-1, term.c.y-1);
1374 tclearregion(0, term.c.y, term.c.x, term.c.y);
1375 break;
1376 case 2: /* all */
1377 tclearregion(0, 0, term.col-1, term.row-1);
1378 break;
1379 default:
1380 goto unknown;
1381 }
1382 break;
1383 case 'K': /* EL -- Clear line */
1384 switch(csiescseq.arg[0]) {
1385 case 0: /* right */
1386 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1387 break;
1388 case 1: /* left */
1389 tclearregion(0, term.c.y, term.c.x, term.c.y);
1390 break;
1391 case 2: /* all */
1392 tclearregion(0, term.c.y, term.col-1, term.c.y);
1393 break;
1394 }
1395 break;
1396 case 'S': /* SU -- Scroll <n> line up */
1397 DEFAULT(csiescseq.arg[0], 1);
1398 tscrollup(term.top, csiescseq.arg[0]);
1399 break;
1400 case 'T': /* SD -- Scroll <n> line down */
1401 DEFAULT(csiescseq.arg[0], 1);
1402 tscrolldown(term.top, csiescseq.arg[0]);
1403 break;
1404 case 'L': /* IL -- Insert <n> blank lines */
1405 DEFAULT(csiescseq.arg[0], 1);
1406 tinsertblankline(csiescseq.arg[0]);
1407 break;
1408 case 'l': /* RM -- Reset Mode */
1409 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1410 break;
1411 case 'M': /* DL -- Delete <n> lines */
1412 DEFAULT(csiescseq.arg[0], 1);
1413 tdeleteline(csiescseq.arg[0]);
1414 break;
1415 case 'X': /* ECH -- Erase <n> char */
1416 DEFAULT(csiescseq.arg[0], 1);
1417 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
1418 break;
1419 case 'P': /* DCH -- Delete <n> char */
1420 DEFAULT(csiescseq.arg[0], 1);
1421 tdeletechar(csiescseq.arg[0]);
1422 break;
1423 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1424 DEFAULT(csiescseq.arg[0], 1);
1425 while(csiescseq.arg[0]--)
1426 tputtab(0);
1427 break;
1428 case 'd': /* VPA -- Move to <row> */
1429 DEFAULT(csiescseq.arg[0], 1);
1430 tmoveto(term.c.x, csiescseq.arg[0]-1);
1431 break;
1432 case 'h': /* SM -- Set terminal mode */
1433 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1434 break;
1435 case 'm': /* SGR -- Terminal attribute (color) */
1436 tsetattr(csiescseq.arg, csiescseq.narg);
1437 break;
1438 case 'r': /* DECSTBM -- Set Scrolling Region */
1439 if(csiescseq.priv)
1440 goto unknown;
1441 else {
1442 DEFAULT(csiescseq.arg[0], 1);
1443 DEFAULT(csiescseq.arg[1], term.row);
1444 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1445 tmoveto(0, 0);
1446 }
1447 break;
1448 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1449 tcursor(CURSOR_SAVE);
1450 break;
1451 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1452 tcursor(CURSOR_LOAD);
1453 break;
1454 }
1455 }
1456
1457 void
1458 csidump(void) {
1459 int i;
1460 printf("ESC[");
1461 for(i = 0; i < csiescseq.len; i++) {
1462 uint c = csiescseq.buf[i] & 0xff;
1463 if(isprint(c)) putchar(c);
1464 else if(c == '\n') printf("(\\n)");
1465 else if(c == '\r') printf("(\\r)");
1466 else if(c == 0x1b) printf("(\\e)");
1467 else printf("(%02x)", c);
1468 }
1469 putchar('\n');
1470 }
1471
1472 void
1473 csireset(void) {
1474 memset(&csiescseq, 0, sizeof(csiescseq));
1475 }
1476
1477 void
1478 strhandle(void) {
1479 char *p;
1480
1481 /*
1482 * TODO: make this being useful in case of color palette change.
1483 */
1484 strparse();
1485
1486 p = strescseq.buf;
1487
1488 switch(strescseq.type) {
1489 case ']': /* OSC -- Operating System Command */
1490 switch(p[0]) {
1491 case '0':
1492 case '1':
1493 case '2':
1494 /*
1495 * TODO: Handle special chars in string, like umlauts.
1496 */
1497 if(p[1] == ';') {
1498 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1499 }
1500 break;
1501 case ';':
1502 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1503 break;
1504 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1505 break;
1506 default:
1507 fprintf(stderr, "erresc: unknown str ");
1508 strdump();
1509 break;
1510 }
1511 break;
1512 case 'k': /* old title set compatibility */
1513 XStoreName(xw.dpy, xw.win, strescseq.buf);
1514 break;
1515 case 'P': /* DSC -- Device Control String */
1516 case '_': /* APC -- Application Program Command */
1517 case '^': /* PM -- Privacy Message */
1518 default:
1519 fprintf(stderr, "erresc: unknown str ");
1520 strdump();
1521 /* die(""); */
1522 break;
1523 }
1524 }
1525
1526 void
1527 strparse(void) {
1528 /*
1529 * TODO: Implement parsing like for CSI when required.
1530 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1531 */
1532 return;
1533 }
1534
1535 void
1536 strdump(void) {
1537 int i;
1538 printf("ESC%c", strescseq.type);
1539 for(i = 0; i < strescseq.len; i++) {
1540 uint c = strescseq.buf[i] & 0xff;
1541 if(isprint(c)) putchar(c);
1542 else if(c == '\n') printf("(\\n)");
1543 else if(c == '\r') printf("(\\r)");
1544 else if(c == 0x1b) printf("(\\e)");
1545 else printf("(%02x)", c);
1546 }
1547 printf("ESC\\\n");
1548 }
1549
1550 void
1551 strreset(void) {
1552 memset(&strescseq, 0, sizeof(strescseq));
1553 }
1554
1555 void
1556 tputtab(bool forward) {
1557 unsigned x = term.c.x;
1558
1559 if(forward) {
1560 if(x == term.col)
1561 return;
1562 for(++x; x < term.col && !term.tabs[x]; ++x)
1563 /* nothing */ ;
1564 } else {
1565 if(x == 0)
1566 return;
1567 for(--x; x > 0 && !term.tabs[x]; --x)
1568 /* nothing */ ;
1569 }
1570 tmoveto(x, term.c.y);
1571 }
1572
1573 void
1574 tputc(char *c) {
1575 char ascii = *c;
1576
1577 if(fileio) {
1578 putc(ascii, fileio);
1579 fflush(fileio);
1580 }
1581
1582 if(term.esc & ESC_START) {
1583 if(term.esc & ESC_CSI) {
1584 csiescseq.buf[csiescseq.len++] = ascii;
1585 if(BETWEEN(ascii, 0x40, 0x7E) || csiescseq.len >= ESC_BUF_SIZ) {
1586 term.esc = 0;
1587 csiparse(), csihandle();
1588 }
1589 } else if(term.esc & ESC_STR) {
1590 switch(ascii) {
1591 case '\033':
1592 term.esc = ESC_START | ESC_STR_END;
1593 break;
1594 case '\a': /* backwards compatibility to xterm */
1595 term.esc = 0;
1596 strhandle();
1597 break;
1598 default:
1599 strescseq.buf[strescseq.len++] = ascii;
1600 if(strescseq.len+1 >= STR_BUF_SIZ) {
1601 term.esc = 0;
1602 strhandle();
1603 }
1604 }
1605 } else if(term.esc & ESC_STR_END) {
1606 term.esc = 0;
1607 if(ascii == '\\')
1608 strhandle();
1609 } else if(term.esc & ESC_ALTCHARSET) {
1610 switch(ascii) {
1611 case '0': /* Line drawing crap */
1612 term.c.attr.mode |= ATTR_GFX;
1613 break;
1614 case 'B': /* Back to regular text */
1615 term.c.attr.mode &= ~ATTR_GFX;
1616 break;
1617 default:
1618 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1619 }
1620 term.esc = 0;
1621 } else {
1622 switch(ascii) {
1623 case '[':
1624 term.esc |= ESC_CSI;
1625 break;
1626 case 'P': /* DCS -- Device Control String */
1627 case '_': /* APC -- Application Program Command */
1628 case '^': /* PM -- Privacy Message */
1629 case ']': /* OSC -- Operating System Command */
1630 case 'k': /* old title set compatibility */
1631 strreset();
1632 strescseq.type = ascii;
1633 term.esc |= ESC_STR;
1634 break;
1635 case '(':
1636 term.esc |= ESC_ALTCHARSET;
1637 break;
1638 case 'D': /* IND -- Linefeed */
1639 if(term.c.y == term.bot)
1640 tscrollup(term.top, 1);
1641 else
1642 tmoveto(term.c.x, term.c.y+1);
1643 term.esc = 0;
1644 break;
1645 case 'E': /* NEL -- Next line */
1646 tnewline(1); /* always go to first col */
1647 term.esc = 0;
1648 break;
1649 case 'H': /* HTS -- Horizontal tab stop */
1650 term.tabs[term.c.x] = 1;
1651 term.esc = 0;
1652 break;
1653 case 'M': /* RI -- Reverse index */
1654 if(term.c.y == term.top)
1655 tscrolldown(term.top, 1);
1656 else
1657 tmoveto(term.c.x, term.c.y-1);
1658 term.esc = 0;
1659 break;
1660 case 'c': /* RIS -- Reset to inital state */
1661 treset();
1662 term.esc = 0;
1663 break;
1664 case '=': /* DECPAM -- Application keypad */
1665 term.mode |= MODE_APPKEYPAD;
1666 term.esc = 0;
1667 break;
1668 case '>': /* DECPNM -- Normal keypad */
1669 term.mode &= ~MODE_APPKEYPAD;
1670 term.esc = 0;
1671 break;
1672 case '7': /* DECSC -- Save Cursor */
1673 tcursor(CURSOR_SAVE);
1674 term.esc = 0;
1675 break;
1676 case '8': /* DECRC -- Restore Cursor */
1677 tcursor(CURSOR_LOAD);
1678 term.esc = 0;
1679 break;
1680 case '\\': /* ST -- Stop */
1681 term.esc = 0;
1682 break;
1683 default:
1684 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
1685 (uchar) ascii, isprint(ascii)?ascii:'.');
1686 term.esc = 0;
1687 }
1688 }
1689 } else {
1690 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
1691 sel.bx = -1;
1692 switch(ascii) {
1693 case '\t':
1694 tputtab(1);
1695 break;
1696 case '\b':
1697 tmoveto(term.c.x-1, term.c.y);
1698 break;
1699 case '\r':
1700 tmoveto(0, term.c.y);
1701 break;
1702 case '\f':
1703 case '\v':
1704 case '\n':
1705 /* go to first col if the mode is set */
1706 tnewline(IS_SET(MODE_CRLF));
1707 break;
1708 case '\a':
1709 if(!(xw.state & WIN_FOCUSED))
1710 xseturgency(1);
1711 break;
1712 case '\033':
1713 csireset();
1714 term.esc = ESC_START;
1715 break;
1716 default:
1717 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1718 tnewline(1); /* always go to first col */
1719 tsetchar(c);
1720 if(term.c.x+1 < term.col)
1721 tmoveto(term.c.x+1, term.c.y);
1722 else
1723 term.c.state |= CURSOR_WRAPNEXT;
1724 }
1725 }
1726 }
1727
1728 int
1729 tresize(int col, int row) {
1730 int i, x;
1731 int minrow = MIN(row, term.row);
1732 int mincol = MIN(col, term.col);
1733 int slide = term.c.y - row + 1;
1734
1735 if(col < 1 || row < 1)
1736 return 0;
1737
1738 /* free unneeded rows */
1739 i = 0;
1740 if(slide > 0) {
1741 /* slide screen to keep cursor where we expect it -
1742 * tscrollup would work here, but we can optimize to
1743 * memmove because we're freeing the earlier lines */
1744 for(/* i = 0 */; i < slide; i++) {
1745 free(term.line[i]);
1746 free(term.alt[i]);
1747 }
1748 memmove(term.line, term.line + slide, row * sizeof(Line));
1749 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1750 }
1751 for(i += row; i < term.row; i++) {
1752 free(term.line[i]);
1753 free(term.alt[i]);
1754 }
1755
1756 /* resize to new height */
1757 term.line = realloc(term.line, row * sizeof(Line));
1758 term.alt = realloc(term.alt, row * sizeof(Line));
1759 term.dirty = realloc(term.dirty, row * sizeof(*term.dirty));
1760 term.tabs = realloc(term.tabs, col * sizeof(*term.tabs));
1761
1762 /* resize each row to new width, zero-pad if needed */
1763 for(i = 0; i < minrow; i++) {
1764 term.dirty[i] = 1;
1765 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
1766 term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
1767 for(x = mincol; x < col; x++) {
1768 term.line[i][x].state = 0;
1769 term.alt[i][x].state = 0;
1770 }
1771 }
1772
1773 /* allocate any new rows */
1774 for(/* i == minrow */; i < row; i++) {
1775 term.dirty[i] = 1;
1776 term.line[i] = calloc(col, sizeof(Glyph));
1777 term.alt [i] = calloc(col, sizeof(Glyph));
1778 }
1779 if(col > term.col) {
1780 bool *bp = term.tabs + term.col;
1781
1782 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
1783 while(--bp > term.tabs && !*bp)
1784 /* nothing */ ;
1785 for(bp += TAB; bp < term.tabs + col; bp += TAB)
1786 *bp = 1;
1787 }
1788 /* update terminal size */
1789 term.col = col, term.row = row;
1790 /* make use of the LIMIT in tmoveto */
1791 tmoveto(term.c.x, term.c.y);
1792 /* reset scrolling region */
1793 tsetscroll(0, row-1);
1794
1795 return (slide > 0);
1796 }
1797
1798 void
1799 xresize(int col, int row) {
1800 xw.w = MAX(1, 2*BORDER + col * xw.cw);
1801 xw.h = MAX(1, 2*BORDER + row * xw.ch);
1802 }
1803
1804 void
1805 xloadcols(void) {
1806 int i, r, g, b;
1807 XColor color;
1808 ulong white = WhitePixel(xw.dpy, xw.scr);
1809
1810 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
1811 for(i = 0; i < LEN(colorname); i++) {
1812 if(!colorname[i])
1813 continue;
1814 if(!XAllocNamedColor(xw.dpy, xw.cmap, colorname[i], &color, &color)) {
1815 dc.col[i] = white;
1816 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1817 } else
1818 dc.col[i] = color.pixel;
1819 }
1820
1821 /* load colors [16-255] ; same colors as xterm */
1822 for(i = 16, r = 0; r < 6; r++)
1823 for(g = 0; g < 6; g++)
1824 for(b = 0; b < 6; b++) {
1825 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1826 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1827 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1828 if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
1829 dc.col[i] = white;
1830 fprintf(stderr, "Could not allocate color %d\n", i);
1831 } else
1832 dc.col[i] = color.pixel;
1833 i++;
1834 }
1835
1836 for(r = 0; r < 24; r++, i++) {
1837 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1838 if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
1839 dc.col[i] = white;
1840 fprintf(stderr, "Could not allocate color %d\n", i);
1841 } else
1842 dc.col[i] = color.pixel;
1843 }
1844 }
1845
1846 void
1847 xclear(int x1, int y1, int x2, int y2) {
1848 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
1849 XFillRectangle(xw.dpy, xw.buf, dc.gc,
1850 BORDER + x1 * xw.cw, BORDER + y1 * xw.ch,
1851 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1852 }
1853
1854 void
1855 xhints(void) {
1856 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
1857 XWMHints wm = {.flags = InputHint, .input = 1};
1858 XSizeHints *sizeh = NULL;
1859
1860 sizeh = XAllocSizeHints();
1861 if(xw.isfixed == False) {
1862 sizeh->flags = PSize | PResizeInc | PBaseSize;
1863 sizeh->height = xw.h;
1864 sizeh->width = xw.w;
1865 sizeh->height_inc = xw.ch;
1866 sizeh->width_inc = xw.cw;
1867 sizeh->base_height = 2*BORDER;
1868 sizeh->base_width = 2*BORDER;
1869 } else {
1870 sizeh->flags = PMaxSize | PMinSize;
1871 sizeh->min_width = sizeh->max_width = xw.fw;
1872 sizeh->min_height = sizeh->max_height = xw.fh;
1873 }
1874
1875 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
1876 XFree(sizeh);
1877 }
1878
1879 XFontSet
1880 xinitfont(char *fontstr) {
1881 XFontSet set;
1882 char *def, **missing;
1883 int n;
1884
1885 missing = NULL;
1886 set = XCreateFontSet(xw.dpy, fontstr, &missing, &n, &def);
1887 if(missing) {
1888 while(n--)
1889 fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
1890 XFreeStringList(missing);
1891 }
1892 return set;
1893 }
1894
1895 void
1896 xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing) {
1897 XFontStruct **xfonts;
1898 char **font_names;
1899 int i, n;
1900
1901 *ascent = *descent = *lbearing = *rbearing = 0;
1902 n = XFontsOfFontSet(set, &xfonts, &font_names);
1903 for(i = 0; i < n; i++) {
1904 *ascent = MAX(*ascent, (*xfonts)->ascent);
1905 *descent = MAX(*descent, (*xfonts)->descent);
1906 *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
1907 *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
1908 xfonts++;
1909 }
1910 }
1911
1912 void
1913 initfonts(char *fontstr, char *bfontstr, char *ifontstr) {
1914 if((dc.font.set = xinitfont(fontstr)) == NULL)
1915 die("Can't load font %s\n", fontstr);
1916 if((dc.bfont.set = xinitfont(bfontstr)) == NULL)
1917 die("Can't load bfont %s\n", bfontstr);
1918 if((dc.ifont.set = xinitfont(ifontstr)) == NULL)
1919 die("Can't load ifont %s\n", ifontstr);
1920
1921 xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
1922 &dc.font.lbearing, &dc.font.rbearing);
1923 xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
1924 &dc.bfont.lbearing, &dc.bfont.rbearing);
1925 xgetfontinfo(dc.ifont.set, &dc.ifont.ascent, &dc.ifont.descent,
1926 &dc.ifont.lbearing, &dc.ifont.rbearing);
1927 }
1928
1929 void
1930 xinit(void) {
1931 XSetWindowAttributes attrs;
1932 Cursor cursor;
1933 Window parent;
1934 int sw, sh;
1935
1936 if(!(xw.dpy = XOpenDisplay(NULL)))
1937 die("Can't open display\n");
1938 xw.scr = XDefaultScreen(xw.dpy);
1939
1940 /* font */
1941 initfonts(FONT, BOLDFONT, ITALICFONT);
1942
1943 /* XXX: Assuming same size for bold font */
1944 xw.cw = dc.font.rbearing - dc.font.lbearing;
1945 xw.ch = dc.font.ascent + dc.font.descent;
1946
1947 /* colors */
1948 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1949 xloadcols();
1950
1951 /* adjust fixed window geometry */
1952 if(xw.isfixed) {
1953 sw = DisplayWidth(xw.dpy, xw.scr);
1954 sh = DisplayHeight(xw.dpy, xw.scr);
1955 if(xw.fx < 0)
1956 xw.fx = sw + xw.fx - xw.fw - 1;
1957 if(xw.fy < 0)
1958 xw.fy = sh + xw.fy - xw.fh - 1;
1959
1960 xw.h = xw.fh;
1961 xw.w = xw.fw;
1962 } else {
1963 /* window - default size */
1964 xw.h = 2*BORDER + term.row * xw.ch;
1965 xw.w = 2*BORDER + term.col * xw.cw;
1966 xw.fx = 0;
1967 xw.fy = 0;
1968 }
1969
1970 attrs.background_pixel = dc.col[DefaultBG];
1971 attrs.border_pixel = dc.col[DefaultBG];
1972 attrs.bit_gravity = NorthWestGravity;
1973 attrs.event_mask = FocusChangeMask | KeyPressMask
1974 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1975 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
1976 attrs.colormap = xw.cmap;
1977
1978 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
1979 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
1980 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
1981 XDefaultVisual(xw.dpy, xw.scr),
1982 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
1983 | CWColormap,
1984 &attrs);
1985 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
1986
1987
1988 /* input methods */
1989 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
1990 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
1991 | XIMStatusNothing, XNClientWindow, xw.win,
1992 XNFocusWindow, xw.win, NULL);
1993 /* gc */
1994 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
1995
1996 /* white cursor, black outline */
1997 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
1998 XDefineCursor(xw.dpy, xw.win, cursor);
1999 XRecolorCursor(xw.dpy, cursor,
2000 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2001 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2002
2003 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2004
2005 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
2006 XMapWindow(xw.dpy, xw.win);
2007 xhints();
2008 XSync(xw.dpy, 0);
2009 }
2010
2011 void
2012 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2013 int fg = base.fg, bg = base.bg, temp;
2014 int winx = BORDER+x*xw.cw, winy = BORDER+y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
2015 XFontSet fontset = dc.font.set;
2016 int i;
2017
2018 /* only switch default fg/bg if term is in RV mode */
2019 if(IS_SET(MODE_REVERSE)) {
2020 if(fg == DefaultFG)
2021 fg = DefaultBG;
2022 if(bg == DefaultBG)
2023 bg = DefaultFG;
2024 }
2025
2026 if(base.mode & ATTR_REVERSE)
2027 temp = fg, fg = bg, bg = temp;
2028
2029 if(base.mode & ATTR_BOLD) {
2030 fg += 8;
2031 fontset = dc.bfont.set;
2032 }
2033
2034 if(base.mode & ATTR_ITALIC)
2035 fontset = dc.ifont.set;
2036
2037 XSetBackground(xw.dpy, dc.gc, dc.col[bg]);
2038 XSetForeground(xw.dpy, dc.gc, dc.col[fg]);
2039
2040 if(base.mode & ATTR_GFX) {
2041 for(i = 0; i < bytelen; i++) {
2042 char c = gfx[(uint)s[i] % 256];
2043 if(c)
2044 s[i] = c;
2045 else if(s[i] > 0x5f)
2046 s[i] -= 0x5f;
2047 }
2048 }
2049
2050 XmbDrawImageString(xw.dpy, xw.buf, fontset, dc.gc, winx, winy, s, bytelen);
2051
2052 if(base.mode & ATTR_UNDERLINE)
2053 XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
2054 }
2055
2056 /* copy buffer pixmap to screen pixmap */
2057 void
2058 xcopy() {
2059 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2060 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2061 }
2062
2063 void
2064 xdrawcursor(void) {
2065 static int oldx = 0;
2066 static int oldy = 0;
2067 int sl;
2068 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
2069
2070 LIMIT(oldx, 0, term.col-1);
2071 LIMIT(oldy, 0, term.row-1);
2072
2073 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2074 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2075
2076 /* remove the old cursor */
2077 if(term.line[oldy][oldx].state & GLYPH_SET) {
2078 sl = utf8size(term.line[oldy][oldx].c);
2079 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
2080 } else
2081 xclear(oldx, oldy, oldx, oldy);
2082
2083 xcopy();
2084
2085 /* draw the new one */
2086 if(!(term.c.state & CURSOR_HIDE)) {
2087 if(!(xw.state & WIN_FOCUSED))
2088 g.bg = DefaultUCS;
2089
2090 if(IS_SET(MODE_REVERSE))
2091 g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
2092
2093 sl = utf8size(g.c);
2094 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2095 oldx = term.c.x, oldy = term.c.y;
2096 }
2097
2098 xcopy();
2099 }
2100
2101 void
2102 redraw(void) {
2103 struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
2104 tfulldirt();
2105 draw();
2106 nanosleep(&tv, NULL);
2107 }
2108
2109 void
2110 draw() {
2111 drawregion(0, 0, term.col, term.row);
2112 xcopy();
2113 gettimeofday(&xw.lastdraw, NULL);
2114 }
2115
2116 void
2117 drawregion(int x1, int y1, int x2, int y2) {
2118 int ic, ib, x, y, ox, sl;
2119 Glyph base, new;
2120 char buf[DRAW_BUF_SIZ];
2121 bool ena_sel = sel.bx != -1, alt = IS_SET(MODE_ALTSCREEN);
2122
2123 if((sel.alt && !alt) || (!sel.alt && alt))
2124 ena_sel = 0;
2125 if(!(xw.state & WIN_VISIBLE))
2126 return;
2127
2128 for(y = y1; y < y2; y++) {
2129 if(!term.dirty[y])
2130 continue;
2131 xclear(0, y, term.col, y);
2132 term.dirty[y] = 0;
2133 base = term.line[y][0];
2134 ic = ib = ox = 0;
2135 for(x = x1; x < x2; x++) {
2136 new = term.line[y][x];
2137 if(ena_sel && *(new.c) && selected(x, y))
2138 new.mode ^= ATTR_REVERSE;
2139 if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
2140 ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2141 xdraws(buf, base, ox, y, ic, ib);
2142 ic = ib = 0;
2143 }
2144 if(new.state & GLYPH_SET) {
2145 if(ib == 0) {
2146 ox = x;
2147 base = new;
2148 }
2149 sl = utf8size(new.c);
2150 memcpy(buf+ib, new.c, sl);
2151 ib += sl;
2152 ++ic;
2153 }
2154 }
2155 if(ib > 0)
2156 xdraws(buf, base, ox, y, ic, ib);
2157 }
2158 xdrawcursor();
2159 }
2160
2161 void
2162 expose(XEvent *ev) {
2163 XExposeEvent *e = &ev->xexpose;
2164 if(xw.state & WIN_REDRAW) {
2165 if(!e->count)
2166 xw.state &= ~WIN_REDRAW;
2167 }
2168 xcopy();
2169 }
2170
2171 void
2172 visibility(XEvent *ev) {
2173 XVisibilityEvent *e = &ev->xvisibility;
2174 if(e->state == VisibilityFullyObscured)
2175 xw.state &= ~WIN_VISIBLE;
2176 else if(!(xw.state & WIN_VISIBLE))
2177 /* need a full redraw for next Expose, not just a buf copy */
2178 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2179 }
2180
2181 void
2182 unmap(XEvent *ev) {
2183 xw.state &= ~WIN_VISIBLE;
2184 }
2185
2186 void
2187 xseturgency(int add) {
2188 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2189 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2190 XSetWMHints(xw.dpy, xw.win, h);
2191 XFree(h);
2192 }
2193
2194 void
2195 focus(XEvent *ev) {
2196 if(ev->type == FocusIn) {
2197 xw.state |= WIN_FOCUSED;
2198 xseturgency(0);
2199 } else
2200 xw.state &= ~WIN_FOCUSED;
2201 draw();
2202 }
2203
2204 char*
2205 kmap(KeySym k, uint state) {
2206 int i;
2207 state &= ~Mod2Mask;
2208 for(i = 0; i < LEN(key); i++) {
2209 uint mask = key[i].mask;
2210 if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
2211 return (char*)key[i].s;
2212 }
2213 return NULL;
2214 }
2215
2216 void
2217 kpress(XEvent *ev) {
2218 XKeyEvent *e = &ev->xkey;
2219 KeySym ksym;
2220 char buf[32];
2221 char *customkey;
2222 int len;
2223 int meta;
2224 int shift;
2225 Status status;
2226
2227 meta = e->state & Mod1Mask;
2228 shift = e->state & ShiftMask;
2229 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
2230
2231 /* 1. custom keys from config.h */
2232 if((customkey = kmap(ksym, e->state)))
2233 ttywrite(customkey, strlen(customkey));
2234 /* 2. hardcoded (overrides X lookup) */
2235 else
2236 switch(ksym) {
2237 case XK_Up:
2238 case XK_Down:
2239 case XK_Left:
2240 case XK_Right:
2241 /* XXX: shift up/down doesn't work */
2242 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
2243 ttywrite(buf, 3);
2244 break;
2245 case XK_Insert:
2246 if(shift)
2247 selpaste();
2248 break;
2249 case XK_Return:
2250 if(IS_SET(MODE_CRLF))
2251 ttywrite("\r\n", 2);
2252 else
2253 ttywrite("\r", 1);
2254 break;
2255 /* 3. X lookup */
2256 default:
2257 if(len > 0) {
2258 if(meta && len == 1)
2259 ttywrite("\033", 1);
2260 ttywrite(buf, len);
2261 }
2262 break;
2263 }
2264 }
2265
2266 void
2267 cmessage(XEvent *e) {
2268 /* See xembed specs
2269 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2270 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2271 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2272 xw.state |= WIN_FOCUSED;
2273 xseturgency(0);
2274 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2275 xw.state &= ~WIN_FOCUSED;
2276 }
2277 draw();
2278 }
2279 }
2280
2281 void
2282 resize(XEvent *e) {
2283 int col, row;
2284
2285 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2286 return;
2287
2288 xw.w = e->xconfigure.width;
2289 xw.h = e->xconfigure.height;
2290 col = (xw.w - 2*BORDER) / xw.cw;
2291 row = (xw.h - 2*BORDER) / xw.ch;
2292 if(col == term.col && row == term.row)
2293 return;
2294 if(tresize(col, row))
2295 draw();
2296 xresize(col, row);
2297 ttyresize(col, row);
2298 }
2299
2300 bool
2301 last_draw_too_old(void) {
2302 struct timeval now;
2303 gettimeofday(&now, NULL);
2304 return TIMEDIFF(now, xw.lastdraw) >= DRAW_TIMEOUT/1000;
2305 }
2306
2307 void
2308 run(void) {
2309 XEvent ev;
2310 fd_set rfd;
2311 int xfd = XConnectionNumber(xw.dpy);
2312 struct timeval timeout = {0};
2313 bool stuff_to_print = 0;
2314
2315 for(;;) {
2316 FD_ZERO(&rfd);
2317 FD_SET(cmdfd, &rfd);
2318 FD_SET(xfd, &rfd);
2319 timeout.tv_sec = 0;
2320 timeout.tv_usec = SELECT_TIMEOUT;
2321 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, &timeout) < 0) {
2322 if(errno == EINTR)
2323 continue;
2324 die("select failed: %s\n", SERRNO);
2325 }
2326 if(FD_ISSET(cmdfd, &rfd)) {
2327 ttyread();
2328 stuff_to_print = 1;
2329 }
2330
2331 if(stuff_to_print && last_draw_too_old()) {
2332 stuff_to_print = 0;
2333 draw();
2334 }
2335
2336 while(XPending(xw.dpy)) {
2337 XNextEvent(xw.dpy, &ev);
2338 if(XFilterEvent(&ev, xw.win))
2339 continue;
2340 if(handler[ev.type])
2341 (handler[ev.type])(&ev);
2342 }
2343 }
2344 }
2345
2346 int
2347 main(int argc, char *argv[]) {
2348 int i, bitm, xr, yr;
2349 unsigned int wr, hr;
2350
2351 xw.fw = xw.fh = xw.fx = xw.fy = 0;
2352 xw.isfixed = False;
2353
2354 for(i = 1; i < argc; i++) {
2355 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2356 case 't':
2357 if(++i < argc) opt_title = argv[i];
2358 break;
2359 case 'c':
2360 if(++i < argc) opt_class = argv[i];
2361 break;
2362 case 'w':
2363 if(++i < argc) opt_embed = argv[i];
2364 break;
2365 case 'f':
2366 if(++i < argc) opt_io = argv[i];
2367 break;
2368 case 'e':
2369 /* eat every remaining arguments */
2370 if(++i < argc) opt_cmd = &argv[i];
2371 goto run;
2372 case 'g':
2373 if(++i >= argc)
2374 break;
2375
2376 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
2377 if(bitm & XValue)
2378 xw.fx = xr;
2379 if(bitm & YValue)
2380 xw.fy = yr;
2381 if(bitm & WidthValue)
2382 xw.fw = (int)wr;
2383 if(bitm & HeightValue)
2384 xw.fh = (int)hr;
2385 if(bitm & XNegative && xw.fx == 0)
2386 xw.fx = -1;
2387 if(bitm & XNegative && xw.fy == 0)
2388 xw.fy = -1;
2389
2390 if(xw.fh != 0 && xw.fw != 0)
2391 xw.isfixed = True;
2392 break;
2393 case 'v':
2394 default:
2395 die(USAGE);
2396 }
2397 }
2398
2399 run:
2400 setlocale(LC_CTYPE, "");
2401 tnew(80, 24);
2402 ttynew();
2403 xinit();
2404 selinit();
2405 run();
2406 return 0;
2407 }
2408