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7852de0745f3bac16ee4947ab963172a4bdc1f03
[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) {
805 if(!strcmp(opt_io, "-")) {
806 fileio = stdout;
807 } else {
808 if(!(fileio = fopen(opt_io, "w"))) {
809 fprintf(stderr, "Error opening %s:%s\n",
810 opt_io, strerror(errno));
811 }
812 }
813 }
814 }
815 }
816
817 void
818 dump(char c) {
819 static int col;
820 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
821 if(++col % 10 == 0)
822 fprintf(stderr, "\n");
823 }
824
825 void
826 ttyread(void) {
827 static char buf[BUFSIZ];
828 static int buflen = 0;
829 char *ptr;
830 char s[UTF_SIZ];
831 int charsize; /* size of utf8 char in bytes */
832 long utf8c;
833 int ret;
834
835 /* append read bytes to unprocessed bytes */
836 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
837 die("Couldn't read from shell: %s\n", SERRNO);
838
839 /* process every complete utf8 char */
840 buflen += ret;
841 ptr = buf;
842 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
843 charsize = utf8decode(ptr, &utf8c);
844 utf8encode(&utf8c, s);
845 tputc(s);
846 ptr += charsize;
847 buflen -= charsize;
848 }
849
850 /* keep any uncomplete utf8 char for the next call */
851 memmove(buf, ptr, buflen);
852 }
853
854 void
855 ttywrite(const char *s, size_t n) {
856 if(write(cmdfd, s, n) == -1)
857 die("write error on tty: %s\n", SERRNO);
858 }
859
860 void
861 ttyresize(int x, int y) {
862 struct winsize w;
863
864 w.ws_row = term.row;
865 w.ws_col = term.col;
866 w.ws_xpixel = xw.w;
867 w.ws_ypixel = xw.h;
868 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
869 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
870 }
871
872 void
873 tsetdirt(int top, int bot)
874 {
875 int i;
876
877 LIMIT(top, 0, term.row-1);
878 LIMIT(bot, 0, term.row-1);
879
880 for(i = top; i <= bot; i++)
881 term.dirty[i] = 1;
882 }
883
884 void
885 tfulldirt(void)
886 {
887 tsetdirt(0, term.row-1);
888 }
889
890 void
891 tcursor(int mode) {
892 static TCursor c;
893
894 if(mode == CURSOR_SAVE)
895 c = term.c;
896 else if(mode == CURSOR_LOAD)
897 term.c = c, tmoveto(c.x, c.y);
898 }
899
900 void
901 treset(void) {
902 unsigned i;
903 term.c = (TCursor){{
904 .mode = ATTR_NULL,
905 .fg = DefaultFG,
906 .bg = DefaultBG
907 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
908
909 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
910 for(i = TAB; i < term.col; i += TAB)
911 term.tabs[i] = 1;
912 term.top = 0, term.bot = term.row - 1;
913 term.mode = MODE_WRAP;
914 tclearregion(0, 0, term.col-1, term.row-1);
915 }
916
917 void
918 tnew(int col, int row) {
919 /* set screen size */
920 term.row = row, term.col = col;
921 term.line = malloc(term.row * sizeof(Line));
922 term.alt = malloc(term.row * sizeof(Line));
923 term.dirty = malloc(term.row * sizeof(*term.dirty));
924 term.tabs = malloc(term.col * sizeof(*term.tabs));
925
926 for(row = 0; row < term.row; row++) {
927 term.line[row] = malloc(term.col * sizeof(Glyph));
928 term.alt [row] = malloc(term.col * sizeof(Glyph));
929 term.dirty[row] = 0;
930 }
931 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
932 /* setup screen */
933 treset();
934 }
935
936 void
937 tswapscreen(void) {
938 Line* tmp = term.line;
939 term.line = term.alt;
940 term.alt = tmp;
941 term.mode ^= MODE_ALTSCREEN;
942 tfulldirt();
943 }
944
945 void
946 tscrolldown(int orig, int n) {
947 int i;
948 Line temp;
949
950 LIMIT(n, 0, term.bot-orig+1);
951
952 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
953
954 for(i = term.bot; i >= orig+n; i--) {
955 temp = term.line[i];
956 term.line[i] = term.line[i-n];
957 term.line[i-n] = temp;
958
959 term.dirty[i] = 1;
960 term.dirty[i-n] = 1;
961 }
962
963 selscroll(orig, n);
964 }
965
966 void
967 tscrollup(int orig, int n) {
968 int i;
969 Line temp;
970 LIMIT(n, 0, term.bot-orig+1);
971
972 tclearregion(0, orig, term.col-1, orig+n-1);
973
974 for(i = orig; i <= term.bot-n; i++) {
975 temp = term.line[i];
976 term.line[i] = term.line[i+n];
977 term.line[i+n] = temp;
978
979 term.dirty[i] = 1;
980 term.dirty[i+n] = 1;
981 }
982
983 selscroll(orig, -n);
984 }
985
986 void
987 selscroll(int orig, int n) {
988 if(sel.bx == -1)
989 return;
990
991 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
992 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
993 sel.bx = -1;
994 return;
995 }
996 if(sel.by < term.top) {
997 sel.by = term.top;
998 sel.bx = 0;
999 }
1000 if(sel.ey > term.bot) {
1001 sel.ey = term.bot;
1002 sel.ex = term.col;
1003 }
1004 sel.b.y = sel.by, sel.b.x = sel.bx;
1005 sel.e.y = sel.ey, sel.e.x = sel.ex;
1006 }
1007 }
1008
1009 void
1010 tnewline(int first_col) {
1011 int y = term.c.y;
1012 if(y == term.bot)
1013 tscrollup(term.top, 1);
1014 else
1015 y++;
1016 tmoveto(first_col ? 0 : term.c.x, y);
1017 }
1018
1019 void
1020 csiparse(void) {
1021 /* int noarg = 1; */
1022 char *p = csiescseq.buf;
1023
1024 csiescseq.narg = 0;
1025 if(*p == '?')
1026 csiescseq.priv = 1, p++;
1027
1028 while(p < csiescseq.buf+csiescseq.len) {
1029 while(isdigit(*p)) {
1030 csiescseq.arg[csiescseq.narg] *= 10;
1031 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1032 }
1033 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ)
1034 csiescseq.narg++, p++;
1035 else {
1036 csiescseq.mode = *p;
1037 csiescseq.narg++;
1038 return;
1039 }
1040 }
1041 }
1042
1043 void
1044 tmoveto(int x, int y) {
1045 LIMIT(x, 0, term.col-1);
1046 LIMIT(y, 0, term.row-1);
1047 term.c.state &= ~CURSOR_WRAPNEXT;
1048 term.c.x = x;
1049 term.c.y = y;
1050 }
1051
1052 void
1053 tsetchar(char *c) {
1054 term.dirty[term.c.y] = 1;
1055 term.line[term.c.y][term.c.x] = term.c.attr;
1056 memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
1057 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
1058 }
1059
1060 void
1061 tclearregion(int x1, int y1, int x2, int y2) {
1062 int x, y, temp;
1063
1064 if(x1 > x2)
1065 temp = x1, x1 = x2, x2 = temp;
1066 if(y1 > y2)
1067 temp = y1, y1 = y2, y2 = temp;
1068
1069 LIMIT(x1, 0, term.col-1);
1070 LIMIT(x2, 0, term.col-1);
1071 LIMIT(y1, 0, term.row-1);
1072 LIMIT(y2, 0, term.row-1);
1073
1074 for(y = y1; y <= y2; y++) {
1075 term.dirty[y] = 1;
1076 for(x = x1; x <= x2; x++)
1077 term.line[y][x].state = 0;
1078 }
1079 }
1080
1081 void
1082 tdeletechar(int n) {
1083 int src = term.c.x + n;
1084 int dst = term.c.x;
1085 int size = term.col - src;
1086
1087 term.dirty[term.c.y] = 1;
1088
1089 if(src >= term.col) {
1090 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1091 return;
1092 }
1093 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1094 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1095 }
1096
1097 void
1098 tinsertblank(int n) {
1099 int src = term.c.x;
1100 int dst = src + n;
1101 int size = term.col - dst;
1102
1103 term.dirty[term.c.y] = 1;
1104
1105 if(dst >= term.col) {
1106 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1107 return;
1108 }
1109 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1110 tclearregion(src, term.c.y, dst - 1, term.c.y);
1111 }
1112
1113 void
1114 tinsertblankline(int n) {
1115 if(term.c.y < term.top || term.c.y > term.bot)
1116 return;
1117
1118 tscrolldown(term.c.y, n);
1119 }
1120
1121 void
1122 tdeleteline(int n) {
1123 if(term.c.y < term.top || term.c.y > term.bot)
1124 return;
1125
1126 tscrollup(term.c.y, n);
1127 }
1128
1129 void
1130 tsetattr(int *attr, int l) {
1131 int i;
1132
1133 for(i = 0; i < l; i++) {
1134 switch(attr[i]) {
1135 case 0:
1136 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1137 | ATTR_ITALIC);
1138 term.c.attr.fg = DefaultFG;
1139 term.c.attr.bg = DefaultBG;
1140 break;
1141 case 1:
1142 term.c.attr.mode |= ATTR_BOLD;
1143 break;
1144 case 3: /* enter standout (highlight) */
1145 term.c.attr.mode |= ATTR_ITALIC;
1146 break;
1147 case 4:
1148 term.c.attr.mode |= ATTR_UNDERLINE;
1149 break;
1150 case 7:
1151 term.c.attr.mode |= ATTR_REVERSE;
1152 break;
1153 case 22:
1154 term.c.attr.mode &= ~ATTR_BOLD;
1155 break;
1156 case 23: /* leave standout (highlight) mode */
1157 term.c.attr.mode &= ~ATTR_ITALIC;
1158 break;
1159 case 24:
1160 term.c.attr.mode &= ~ATTR_UNDERLINE;
1161 break;
1162 case 27:
1163 term.c.attr.mode &= ~ATTR_REVERSE;
1164 break;
1165 case 38:
1166 if(i + 2 < l && attr[i + 1] == 5) {
1167 i += 2;
1168 if(BETWEEN(attr[i], 0, 255))
1169 term.c.attr.fg = attr[i];
1170 else
1171 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
1172 }
1173 else
1174 fprintf(stderr, "erresc(38): gfx attr %d unknown\n", attr[i]);
1175 break;
1176 case 39:
1177 term.c.attr.fg = DefaultFG;
1178 break;
1179 case 48:
1180 if(i + 2 < l && attr[i + 1] == 5) {
1181 i += 2;
1182 if(BETWEEN(attr[i], 0, 255))
1183 term.c.attr.bg = attr[i];
1184 else
1185 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
1186 }
1187 else
1188 fprintf(stderr, "erresc(48): gfx attr %d unknown\n", attr[i]);
1189 break;
1190 case 49:
1191 term.c.attr.bg = DefaultBG;
1192 break;
1193 default:
1194 if(BETWEEN(attr[i], 30, 37))
1195 term.c.attr.fg = attr[i] - 30;
1196 else if(BETWEEN(attr[i], 40, 47))
1197 term.c.attr.bg = attr[i] - 40;
1198 else if(BETWEEN(attr[i], 90, 97))
1199 term.c.attr.fg = attr[i] - 90 + 8;
1200 else if(BETWEEN(attr[i], 100, 107))
1201 term.c.attr.fg = attr[i] - 100 + 8;
1202 else
1203 fprintf(stderr, "erresc(default): gfx attr %d unknown\n", attr[i]), csidump();
1204 break;
1205 }
1206 }
1207 }
1208
1209 void
1210 tsetscroll(int t, int b) {
1211 int temp;
1212
1213 LIMIT(t, 0, term.row-1);
1214 LIMIT(b, 0, term.row-1);
1215 if(t > b) {
1216 temp = t;
1217 t = b;
1218 b = temp;
1219 }
1220 term.top = t;
1221 term.bot = b;
1222 }
1223
1224 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1225
1226 void
1227 tsetmode(bool priv, bool set, int *args, int narg) {
1228 int *lim, mode;
1229
1230 for(lim = args + narg; args < lim; ++args) {
1231 if(priv) {
1232 switch(*args) {
1233 case 1:
1234 MODBIT(term.mode, set, MODE_APPKEYPAD);
1235 break;
1236 case 5: /* DECSCNM -- Reverve video */
1237 mode = term.mode;
1238 MODBIT(term.mode,set, MODE_REVERSE);
1239 if(mode != term.mode)
1240 redraw();
1241 break;
1242 case 7:
1243 MODBIT(term.mode, set, MODE_WRAP);
1244 break;
1245 case 20:
1246 MODBIT(term.mode, set, MODE_CRLF);
1247 break;
1248 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1249 break;
1250 case 25:
1251 MODBIT(term.c.state, !set, CURSOR_HIDE);
1252 break;
1253 case 1000: /* 1000,1002: enable xterm mouse report */
1254 MODBIT(term.mode, set, MODE_MOUSEBTN);
1255 break;
1256 case 1002:
1257 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1258 break;
1259 case 1049: /* = 1047 and 1048 */
1260 case 47:
1261 case 1047:
1262 if(IS_SET(MODE_ALTSCREEN))
1263 tclearregion(0, 0, term.col-1, term.row-1);
1264 if((set && !IS_SET(MODE_ALTSCREEN)) ||
1265 (!set && IS_SET(MODE_ALTSCREEN))) {
1266 tswapscreen();
1267 }
1268 if(*args != 1049)
1269 break;
1270 /* pass through */
1271 case 1048:
1272 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1273 break;
1274 default:
1275 fprintf(stderr,
1276 "erresc: unknown private set/reset mode %d\n",
1277 *args);
1278 break;
1279 }
1280 } else {
1281 switch(*args) {
1282 case 4:
1283 MODBIT(term.mode, set, MODE_INSERT);
1284 break;
1285 default:
1286 fprintf(stderr,
1287 "erresc: unknown set/reset mode %d\n",
1288 *args);
1289 break;
1290 }
1291 }
1292 }
1293 }
1294 #undef MODBIT
1295
1296
1297 void
1298 csihandle(void) {
1299 switch(csiescseq.mode) {
1300 default:
1301 unknown:
1302 fprintf(stderr, "erresc: unknown csi ");
1303 csidump();
1304 /* die(""); */
1305 break;
1306 case '@': /* ICH -- Insert <n> blank char */
1307 DEFAULT(csiescseq.arg[0], 1);
1308 tinsertblank(csiescseq.arg[0]);
1309 break;
1310 case 'A': /* CUU -- Cursor <n> Up */
1311 case 'e':
1312 DEFAULT(csiescseq.arg[0], 1);
1313 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1314 break;
1315 case 'B': /* CUD -- Cursor <n> Down */
1316 DEFAULT(csiescseq.arg[0], 1);
1317 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1318 break;
1319 case 'C': /* CUF -- Cursor <n> Forward */
1320 case 'a':
1321 DEFAULT(csiescseq.arg[0], 1);
1322 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1323 break;
1324 case 'D': /* CUB -- Cursor <n> Backward */
1325 DEFAULT(csiescseq.arg[0], 1);
1326 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1327 break;
1328 case 'E': /* CNL -- Cursor <n> Down and first col */
1329 DEFAULT(csiescseq.arg[0], 1);
1330 tmoveto(0, term.c.y+csiescseq.arg[0]);
1331 break;
1332 case 'F': /* CPL -- Cursor <n> Up and first col */
1333 DEFAULT(csiescseq.arg[0], 1);
1334 tmoveto(0, term.c.y-csiescseq.arg[0]);
1335 break;
1336 case 'g': /* TBC -- Tabulation clear */
1337 switch (csiescseq.arg[0]) {
1338 case 0: /* clear current tab stop */
1339 term.tabs[term.c.x] = 0;
1340 break;
1341 case 3: /* clear all the tabs */
1342 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1343 break;
1344 default:
1345 goto unknown;
1346 }
1347 break;
1348 case 'G': /* CHA -- Move to <col> */
1349 case '`': /* HPA */
1350 DEFAULT(csiescseq.arg[0], 1);
1351 tmoveto(csiescseq.arg[0]-1, term.c.y);
1352 break;
1353 case 'H': /* CUP -- Move to <row> <col> */
1354 case 'f': /* HVP */
1355 DEFAULT(csiescseq.arg[0], 1);
1356 DEFAULT(csiescseq.arg[1], 1);
1357 tmoveto(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1358 break;
1359 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1360 DEFAULT(csiescseq.arg[0], 1);
1361 while(csiescseq.arg[0]--)
1362 tputtab(1);
1363 break;
1364 case 'J': /* ED -- Clear screen */
1365 sel.bx = -1;
1366 switch(csiescseq.arg[0]) {
1367 case 0: /* below */
1368 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1369 if(term.c.y < term.row-1)
1370 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1371 break;
1372 case 1: /* above */
1373 if(term.c.y > 1)
1374 tclearregion(0, 0, term.col-1, term.c.y-1);
1375 tclearregion(0, term.c.y, term.c.x, term.c.y);
1376 break;
1377 case 2: /* all */
1378 tclearregion(0, 0, term.col-1, term.row-1);
1379 break;
1380 default:
1381 goto unknown;
1382 }
1383 break;
1384 case 'K': /* EL -- Clear line */
1385 switch(csiescseq.arg[0]) {
1386 case 0: /* right */
1387 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1388 break;
1389 case 1: /* left */
1390 tclearregion(0, term.c.y, term.c.x, term.c.y);
1391 break;
1392 case 2: /* all */
1393 tclearregion(0, term.c.y, term.col-1, term.c.y);
1394 break;
1395 }
1396 break;
1397 case 'S': /* SU -- Scroll <n> line up */
1398 DEFAULT(csiescseq.arg[0], 1);
1399 tscrollup(term.top, csiescseq.arg[0]);
1400 break;
1401 case 'T': /* SD -- Scroll <n> line down */
1402 DEFAULT(csiescseq.arg[0], 1);
1403 tscrolldown(term.top, csiescseq.arg[0]);
1404 break;
1405 case 'L': /* IL -- Insert <n> blank lines */
1406 DEFAULT(csiescseq.arg[0], 1);
1407 tinsertblankline(csiescseq.arg[0]);
1408 break;
1409 case 'l': /* RM -- Reset Mode */
1410 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1411 break;
1412 case 'M': /* DL -- Delete <n> lines */
1413 DEFAULT(csiescseq.arg[0], 1);
1414 tdeleteline(csiescseq.arg[0]);
1415 break;
1416 case 'X': /* ECH -- Erase <n> char */
1417 DEFAULT(csiescseq.arg[0], 1);
1418 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
1419 break;
1420 case 'P': /* DCH -- Delete <n> char */
1421 DEFAULT(csiescseq.arg[0], 1);
1422 tdeletechar(csiescseq.arg[0]);
1423 break;
1424 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1425 DEFAULT(csiescseq.arg[0], 1);
1426 while(csiescseq.arg[0]--)
1427 tputtab(0);
1428 break;
1429 case 'd': /* VPA -- Move to <row> */
1430 DEFAULT(csiescseq.arg[0], 1);
1431 tmoveto(term.c.x, csiescseq.arg[0]-1);
1432 break;
1433 case 'h': /* SM -- Set terminal mode */
1434 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1435 break;
1436 case 'm': /* SGR -- Terminal attribute (color) */
1437 tsetattr(csiescseq.arg, csiescseq.narg);
1438 break;
1439 case 'r': /* DECSTBM -- Set Scrolling Region */
1440 if(csiescseq.priv)
1441 goto unknown;
1442 else {
1443 DEFAULT(csiescseq.arg[0], 1);
1444 DEFAULT(csiescseq.arg[1], term.row);
1445 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1446 tmoveto(0, 0);
1447 }
1448 break;
1449 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1450 tcursor(CURSOR_SAVE);
1451 break;
1452 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1453 tcursor(CURSOR_LOAD);
1454 break;
1455 }
1456 }
1457
1458 void
1459 csidump(void) {
1460 int i;
1461 printf("ESC[");
1462 for(i = 0; i < csiescseq.len; i++) {
1463 uint c = csiescseq.buf[i] & 0xff;
1464 if(isprint(c)) putchar(c);
1465 else if(c == '\n') printf("(\\n)");
1466 else if(c == '\r') printf("(\\r)");
1467 else if(c == 0x1b) printf("(\\e)");
1468 else printf("(%02x)", c);
1469 }
1470 putchar('\n');
1471 }
1472
1473 void
1474 csireset(void) {
1475 memset(&csiescseq, 0, sizeof(csiescseq));
1476 }
1477
1478 void
1479 strhandle(void) {
1480 char *p;
1481
1482 /*
1483 * TODO: make this being useful in case of color palette change.
1484 */
1485 strparse();
1486
1487 p = strescseq.buf;
1488
1489 switch(strescseq.type) {
1490 case ']': /* OSC -- Operating System Command */
1491 switch(p[0]) {
1492 case '0':
1493 case '1':
1494 case '2':
1495 /*
1496 * TODO: Handle special chars in string, like umlauts.
1497 */
1498 if(p[1] == ';') {
1499 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1500 }
1501 break;
1502 case ';':
1503 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1504 break;
1505 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1506 break;
1507 default:
1508 fprintf(stderr, "erresc: unknown str ");
1509 strdump();
1510 break;
1511 }
1512 break;
1513 case 'P': /* DSC -- Device Control String */
1514 case '_': /* APC -- Application Program Command */
1515 case '^': /* PM -- Privacy Message */
1516 default:
1517 fprintf(stderr, "erresc: unknown str ");
1518 strdump();
1519 /* die(""); */
1520 break;
1521 }
1522 }
1523
1524 void
1525 strparse(void) {
1526 /*
1527 * TODO: Implement parsing like for CSI when required.
1528 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1529 */
1530 return;
1531 }
1532
1533 void
1534 strdump(void) {
1535 int i;
1536 printf("ESC%c", strescseq.type);
1537 for(i = 0; i < strescseq.len; i++) {
1538 uint c = strescseq.buf[i] & 0xff;
1539 if(isprint(c)) putchar(c);
1540 else if(c == '\n') printf("(\\n)");
1541 else if(c == '\r') printf("(\\r)");
1542 else if(c == 0x1b) printf("(\\e)");
1543 else printf("(%02x)", c);
1544 }
1545 printf("ESC\\\n");
1546 }
1547
1548 void
1549 strreset(void) {
1550 memset(&strescseq, 0, sizeof(strescseq));
1551 }
1552
1553 void
1554 tputtab(bool forward) {
1555 unsigned x = term.c.x;
1556
1557 if(forward) {
1558 if(x == term.col)
1559 return;
1560 for(++x; x < term.col && !term.tabs[x]; ++x)
1561 /* nothing */ ;
1562 } else {
1563 if(x == 0)
1564 return;
1565 for(--x; x > 0 && !term.tabs[x]; --x)
1566 /* nothing */ ;
1567 }
1568 tmoveto(x, term.c.y);
1569 }
1570
1571 void
1572 tputc(char *c) {
1573 char ascii = *c;
1574
1575 if(fileio) {
1576 putc(ascii, fileio);
1577 fflush(fileio);
1578 }
1579
1580 if(term.esc & ESC_START) {
1581 if(term.esc & ESC_CSI) {
1582 csiescseq.buf[csiescseq.len++] = ascii;
1583 if(BETWEEN(ascii, 0x40, 0x7E) || csiescseq.len >= ESC_BUF_SIZ) {
1584 term.esc = 0;
1585 csiparse(), csihandle();
1586 }
1587 } else if(term.esc & ESC_STR) {
1588 switch(ascii) {
1589 case '\033':
1590 term.esc = ESC_START | ESC_STR_END;
1591 break;
1592 case '\a': /* backwards compatibility to xterm */
1593 term.esc = 0;
1594 strhandle();
1595 break;
1596 default:
1597 strescseq.buf[strescseq.len++] = ascii;
1598 if(strescseq.len+1 >= STR_BUF_SIZ) {
1599 term.esc = 0;
1600 strhandle();
1601 }
1602 }
1603 } else if(term.esc & ESC_STR_END) {
1604 term.esc = 0;
1605 if(ascii == '\\')
1606 strhandle();
1607 } else if(term.esc & ESC_ALTCHARSET) {
1608 switch(ascii) {
1609 case '0': /* Line drawing crap */
1610 term.c.attr.mode |= ATTR_GFX;
1611 break;
1612 case 'B': /* Back to regular text */
1613 term.c.attr.mode &= ~ATTR_GFX;
1614 break;
1615 default:
1616 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1617 }
1618 term.esc = 0;
1619 } else {
1620 switch(ascii) {
1621 case '[':
1622 term.esc |= ESC_CSI;
1623 break;
1624 case 'P': /* DCS -- Device Control String */
1625 case '_': /* APC -- Application Program Command */
1626 case '^': /* PM -- Privacy Message */
1627 case ']': /* OSC -- Operating System Command */
1628 strreset();
1629 strescseq.type = ascii;
1630 term.esc |= ESC_STR;
1631 break;
1632 case '(':
1633 term.esc |= ESC_ALTCHARSET;
1634 break;
1635 case 'D': /* IND -- Linefeed */
1636 if(term.c.y == term.bot)
1637 tscrollup(term.top, 1);
1638 else
1639 tmoveto(term.c.x, term.c.y+1);
1640 term.esc = 0;
1641 break;
1642 case 'E': /* NEL -- Next line */
1643 tnewline(1); /* always go to first col */
1644 term.esc = 0;
1645 break;
1646 case 'H': /* HTS -- Horizontal tab stop */
1647 term.tabs[term.c.x] = 1;
1648 term.esc = 0;
1649 break;
1650 case 'M': /* RI -- Reverse index */
1651 if(term.c.y == term.top)
1652 tscrolldown(term.top, 1);
1653 else
1654 tmoveto(term.c.x, term.c.y-1);
1655 term.esc = 0;
1656 break;
1657 case 'c': /* RIS -- Reset to inital state */
1658 treset();
1659 term.esc = 0;
1660 break;
1661 case '=': /* DECPAM -- Application keypad */
1662 term.mode |= MODE_APPKEYPAD;
1663 term.esc = 0;
1664 break;
1665 case '>': /* DECPNM -- Normal keypad */
1666 term.mode &= ~MODE_APPKEYPAD;
1667 term.esc = 0;
1668 break;
1669 case '7': /* DECSC -- Save Cursor */
1670 tcursor(CURSOR_SAVE);
1671 term.esc = 0;
1672 break;
1673 case '8': /* DECRC -- Restore Cursor */
1674 tcursor(CURSOR_LOAD);
1675 term.esc = 0;
1676 break;
1677 case '\\': /* ST -- Stop */
1678 term.esc = 0;
1679 break;
1680 default:
1681 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
1682 (uchar) ascii, isprint(ascii)?ascii:'.');
1683 term.esc = 0;
1684 }
1685 }
1686 } else {
1687 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
1688 sel.bx = -1;
1689 switch(ascii) {
1690 case '\t':
1691 tputtab(1);
1692 break;
1693 case '\b':
1694 tmoveto(term.c.x-1, term.c.y);
1695 break;
1696 case '\r':
1697 tmoveto(0, term.c.y);
1698 break;
1699 case '\f':
1700 case '\v':
1701 case '\n':
1702 /* go to first col if the mode is set */
1703 tnewline(IS_SET(MODE_CRLF));
1704 break;
1705 case '\a':
1706 if(!(xw.state & WIN_FOCUSED))
1707 xseturgency(1);
1708 break;
1709 case '\033':
1710 csireset();
1711 term.esc = ESC_START;
1712 break;
1713 default:
1714 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1715 tnewline(1); /* always go to first col */
1716 tsetchar(c);
1717 if(term.c.x+1 < term.col)
1718 tmoveto(term.c.x+1, term.c.y);
1719 else
1720 term.c.state |= CURSOR_WRAPNEXT;
1721 }
1722 }
1723 }
1724
1725 int
1726 tresize(int col, int row) {
1727 int i, x;
1728 int minrow = MIN(row, term.row);
1729 int mincol = MIN(col, term.col);
1730 int slide = term.c.y - row + 1;
1731
1732 if(col < 1 || row < 1)
1733 return 0;
1734
1735 /* free unneeded rows */
1736 i = 0;
1737 if(slide > 0) {
1738 /* slide screen to keep cursor where we expect it -
1739 * tscrollup would work here, but we can optimize to
1740 * memmove because we're freeing the earlier lines */
1741 for(/* i = 0 */; i < slide; i++) {
1742 free(term.line[i]);
1743 free(term.alt[i]);
1744 }
1745 memmove(term.line, term.line + slide, row * sizeof(Line));
1746 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1747 }
1748 for(i += row; i < term.row; i++) {
1749 free(term.line[i]);
1750 free(term.alt[i]);
1751 }
1752
1753 /* resize to new height */
1754 term.line = realloc(term.line, row * sizeof(Line));
1755 term.alt = realloc(term.alt, row * sizeof(Line));
1756 term.dirty = realloc(term.dirty, row * sizeof(*term.dirty));
1757 term.tabs = realloc(term.tabs, col * sizeof(*term.tabs));
1758
1759 /* resize each row to new width, zero-pad if needed */
1760 for(i = 0; i < minrow; i++) {
1761 term.dirty[i] = 1;
1762 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
1763 term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
1764 for(x = mincol; x < col; x++) {
1765 term.line[i][x].state = 0;
1766 term.alt[i][x].state = 0;
1767 }
1768 }
1769
1770 /* allocate any new rows */
1771 for(/* i == minrow */; i < row; i++) {
1772 term.dirty[i] = 1;
1773 term.line[i] = calloc(col, sizeof(Glyph));
1774 term.alt [i] = calloc(col, sizeof(Glyph));
1775 }
1776 if(col > term.col) {
1777 bool *bp = term.tabs + term.col;
1778
1779 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
1780 while(--bp > term.tabs && !*bp)
1781 /* nothing */ ;
1782 for(bp += TAB; bp < term.tabs + col; bp += TAB)
1783 *bp = 1;
1784 }
1785 /* update terminal size */
1786 term.col = col, term.row = row;
1787 /* make use of the LIMIT in tmoveto */
1788 tmoveto(term.c.x, term.c.y);
1789 /* reset scrolling region */
1790 tsetscroll(0, row-1);
1791
1792 return (slide > 0);
1793 }
1794
1795 void
1796 xresize(int col, int row) {
1797 xw.w = MAX(1, 2*BORDER + col * xw.cw);
1798 xw.h = MAX(1, 2*BORDER + row * xw.ch);
1799 }
1800
1801 void
1802 xloadcols(void) {
1803 int i, r, g, b;
1804 XColor color;
1805 ulong white = WhitePixel(xw.dpy, xw.scr);
1806
1807 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
1808 for(i = 0; i < LEN(colorname); i++) {
1809 if(!colorname[i])
1810 continue;
1811 if(!XAllocNamedColor(xw.dpy, xw.cmap, colorname[i], &color, &color)) {
1812 dc.col[i] = white;
1813 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1814 } else
1815 dc.col[i] = color.pixel;
1816 }
1817
1818 /* load colors [16-255] ; same colors as xterm */
1819 for(i = 16, r = 0; r < 6; r++)
1820 for(g = 0; g < 6; g++)
1821 for(b = 0; b < 6; b++) {
1822 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1823 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1824 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1825 if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
1826 dc.col[i] = white;
1827 fprintf(stderr, "Could not allocate color %d\n", i);
1828 } else
1829 dc.col[i] = color.pixel;
1830 i++;
1831 }
1832
1833 for(r = 0; r < 24; r++, i++) {
1834 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1835 if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
1836 dc.col[i] = white;
1837 fprintf(stderr, "Could not allocate color %d\n", i);
1838 } else
1839 dc.col[i] = color.pixel;
1840 }
1841 }
1842
1843 void
1844 xclear(int x1, int y1, int x2, int y2) {
1845 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
1846 XFillRectangle(xw.dpy, xw.buf, dc.gc,
1847 BORDER + x1 * xw.cw, BORDER + y1 * xw.ch,
1848 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1849 }
1850
1851 void
1852 xhints(void) {
1853 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
1854 XWMHints wm = {.flags = InputHint, .input = 1};
1855 XSizeHints *sizeh = NULL;
1856
1857 sizeh = XAllocSizeHints();
1858 if(xw.isfixed == False) {
1859 sizeh->flags = PSize | PResizeInc | PBaseSize;
1860 sizeh->height = xw.h;
1861 sizeh->width = xw.w;
1862 sizeh->height_inc = xw.ch;
1863 sizeh->width_inc = xw.cw;
1864 sizeh->base_height = 2*BORDER;
1865 sizeh->base_width = 2*BORDER;
1866 } else {
1867 sizeh->flags = PMaxSize | PMinSize;
1868 sizeh->min_width = sizeh->max_width = xw.fw;
1869 sizeh->min_height = sizeh->max_height = xw.fh;
1870 }
1871
1872 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
1873 XFree(sizeh);
1874 }
1875
1876 XFontSet
1877 xinitfont(char *fontstr) {
1878 XFontSet set;
1879 char *def, **missing;
1880 int n;
1881
1882 missing = NULL;
1883 set = XCreateFontSet(xw.dpy, fontstr, &missing, &n, &def);
1884 if(missing) {
1885 while(n--)
1886 fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
1887 XFreeStringList(missing);
1888 }
1889 return set;
1890 }
1891
1892 void
1893 xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing) {
1894 XFontStruct **xfonts;
1895 char **font_names;
1896 int i, n;
1897
1898 *ascent = *descent = *lbearing = *rbearing = 0;
1899 n = XFontsOfFontSet(set, &xfonts, &font_names);
1900 for(i = 0; i < n; i++) {
1901 *ascent = MAX(*ascent, (*xfonts)->ascent);
1902 *descent = MAX(*descent, (*xfonts)->descent);
1903 *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
1904 *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
1905 xfonts++;
1906 }
1907 }
1908
1909 void
1910 initfonts(char *fontstr, char *bfontstr, char *ifontstr) {
1911 if((dc.font.set = xinitfont(fontstr)) == NULL)
1912 die("Can't load font %s\n", fontstr);
1913 if((dc.bfont.set = xinitfont(bfontstr)) == NULL)
1914 die("Can't load bfont %s\n", bfontstr);
1915 if((dc.ifont.set = xinitfont(ifontstr)) == NULL)
1916 die("Can't load ifont %s\n", ifontstr);
1917
1918 xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
1919 &dc.font.lbearing, &dc.font.rbearing);
1920 xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
1921 &dc.bfont.lbearing, &dc.bfont.rbearing);
1922 xgetfontinfo(dc.ifont.set, &dc.ifont.ascent, &dc.ifont.descent,
1923 &dc.ifont.lbearing, &dc.ifont.rbearing);
1924 }
1925
1926 void
1927 xinit(void) {
1928 XSetWindowAttributes attrs;
1929 Cursor cursor;
1930 Window parent;
1931 int sw, sh;
1932
1933 if(!(xw.dpy = XOpenDisplay(NULL)))
1934 die("Can't open display\n");
1935 xw.scr = XDefaultScreen(xw.dpy);
1936
1937 /* adjust fixed window geometry */
1938 if(xw.isfixed) {
1939 sw = DisplayWidth(xw.dpy, xw.scr);
1940 sh = DisplayHeight(xw.dpy, xw.scr);
1941 if(xw.fx < 0)
1942 xw.fx = sw + xw.fx - xw.fw - 1;
1943 if(xw.fy < 0)
1944 xw.fy = sh + xw.fy - xw.fh - 1;
1945
1946 xw.h = xw.fh;
1947 xw.w = xw.fw;
1948 } else {
1949 /* window - default size */
1950 xw.h = 2*BORDER + term.row * xw.ch;
1951 xw.w = 2*BORDER + term.col * xw.cw;
1952 xw.fx = 0;
1953 xw.fy = 0;
1954 }
1955
1956 /* font */
1957 initfonts(FONT, BOLDFONT, ITALICFONT);
1958
1959 /* XXX: Assuming same size for bold font */
1960 xw.cw = dc.font.rbearing - dc.font.lbearing;
1961 xw.ch = dc.font.ascent + dc.font.descent;
1962
1963 /* colors */
1964 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1965 xloadcols();
1966
1967 attrs.background_pixel = dc.col[DefaultBG];
1968 attrs.border_pixel = dc.col[DefaultBG];
1969 attrs.bit_gravity = NorthWestGravity;
1970 attrs.event_mask = FocusChangeMask | KeyPressMask
1971 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1972 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
1973 attrs.colormap = xw.cmap;
1974
1975 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
1976 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
1977 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
1978 XDefaultVisual(xw.dpy, xw.scr),
1979 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
1980 | CWColormap,
1981 &attrs);
1982 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
1983
1984
1985 /* input methods */
1986 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
1987 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
1988 | XIMStatusNothing, XNClientWindow, xw.win,
1989 XNFocusWindow, xw.win, NULL);
1990 /* gc */
1991 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
1992
1993 /* white cursor, black outline */
1994 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
1995 XDefineCursor(xw.dpy, xw.win, cursor);
1996 XRecolorCursor(xw.dpy, cursor,
1997 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
1998 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
1999
2000 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2001
2002 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
2003 XMapWindow(xw.dpy, xw.win);
2004 xhints();
2005 XSync(xw.dpy, 0);
2006 }
2007
2008 void
2009 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2010 int fg = base.fg, bg = base.bg, temp;
2011 int winx = BORDER+x*xw.cw, winy = BORDER+y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
2012 XFontSet fontset = dc.font.set;
2013 int i;
2014
2015 /* only switch default fg/bg if term is in RV mode */
2016 if(IS_SET(MODE_REVERSE)) {
2017 if(fg == DefaultFG)
2018 fg = DefaultBG;
2019 if(bg == DefaultBG)
2020 bg = DefaultFG;
2021 }
2022
2023 if(base.mode & ATTR_REVERSE)
2024 temp = fg, fg = bg, bg = temp;
2025
2026 if(base.mode & ATTR_BOLD) {
2027 fg += 8;
2028 fontset = dc.bfont.set;
2029 }
2030
2031 if(base.mode & ATTR_ITALIC)
2032 fontset = dc.ifont.set;
2033
2034 XSetBackground(xw.dpy, dc.gc, dc.col[bg]);
2035 XSetForeground(xw.dpy, dc.gc, dc.col[fg]);
2036
2037 if(base.mode & ATTR_GFX) {
2038 for(i = 0; i < bytelen; i++) {
2039 char c = gfx[(uint)s[i] % 256];
2040 if(c)
2041 s[i] = c;
2042 else if(s[i] > 0x5f)
2043 s[i] -= 0x5f;
2044 }
2045 }
2046
2047 XmbDrawImageString(xw.dpy, xw.buf, fontset, dc.gc, winx, winy, s, bytelen);
2048
2049 if(base.mode & ATTR_UNDERLINE)
2050 XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
2051 }
2052
2053 /* copy buffer pixmap to screen pixmap */
2054 void
2055 xcopy() {
2056 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2057 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2058 }
2059
2060 void
2061 xdrawcursor(void) {
2062 static int oldx = 0;
2063 static int oldy = 0;
2064 int sl;
2065 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
2066
2067 LIMIT(oldx, 0, term.col-1);
2068 LIMIT(oldy, 0, term.row-1);
2069
2070 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2071 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2072
2073 /* remove the old cursor */
2074 if(term.line[oldy][oldx].state & GLYPH_SET) {
2075 sl = utf8size(term.line[oldy][oldx].c);
2076 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
2077 } else
2078 xclear(oldx, oldy, oldx, oldy);
2079
2080 xcopy();
2081
2082 /* draw the new one */
2083 if(!(term.c.state & CURSOR_HIDE)) {
2084 if(!(xw.state & WIN_FOCUSED))
2085 g.bg = DefaultUCS;
2086
2087 if(IS_SET(MODE_REVERSE))
2088 g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
2089
2090 sl = utf8size(g.c);
2091 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2092 oldx = term.c.x, oldy = term.c.y;
2093 }
2094
2095 xcopy();
2096 }
2097
2098 void
2099 redraw(void) {
2100 struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
2101 tfulldirt();
2102 draw();
2103 nanosleep(&tv, NULL);
2104 }
2105
2106 void
2107 draw() {
2108 drawregion(0, 0, term.col, term.row);
2109 xcopy();
2110 gettimeofday(&xw.lastdraw, NULL);
2111 }
2112
2113 void
2114 drawregion(int x1, int y1, int x2, int y2) {
2115 int ic, ib, x, y, ox, sl;
2116 Glyph base, new;
2117 char buf[DRAW_BUF_SIZ];
2118 bool ena_sel = sel.bx != -1, alt = IS_SET(MODE_ALTSCREEN);
2119
2120 if((sel.alt && !alt) || (!sel.alt && alt))
2121 ena_sel = 0;
2122 if(!(xw.state & WIN_VISIBLE))
2123 return;
2124
2125 for(y = y1; y < y2; y++) {
2126 if(!term.dirty[y])
2127 continue;
2128 xclear(0, y, term.col, y);
2129 term.dirty[y] = 0;
2130 base = term.line[y][0];
2131 ic = ib = ox = 0;
2132 for(x = x1; x < x2; x++) {
2133 new = term.line[y][x];
2134 if(ena_sel && *(new.c) && selected(x, y))
2135 new.mode ^= ATTR_REVERSE;
2136 if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
2137 ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2138 xdraws(buf, base, ox, y, ic, ib);
2139 ic = ib = 0;
2140 }
2141 if(new.state & GLYPH_SET) {
2142 if(ib == 0) {
2143 ox = x;
2144 base = new;
2145 }
2146 sl = utf8size(new.c);
2147 memcpy(buf+ib, new.c, sl);
2148 ib += sl;
2149 ++ic;
2150 }
2151 }
2152 if(ib > 0)
2153 xdraws(buf, base, ox, y, ic, ib);
2154 }
2155 xdrawcursor();
2156 }
2157
2158 void
2159 expose(XEvent *ev) {
2160 XExposeEvent *e = &ev->xexpose;
2161 if(xw.state & WIN_REDRAW) {
2162 if(!e->count)
2163 xw.state &= ~WIN_REDRAW;
2164 }
2165 xcopy();
2166 }
2167
2168 void
2169 visibility(XEvent *ev) {
2170 XVisibilityEvent *e = &ev->xvisibility;
2171 if(e->state == VisibilityFullyObscured)
2172 xw.state &= ~WIN_VISIBLE;
2173 else if(!(xw.state & WIN_VISIBLE))
2174 /* need a full redraw for next Expose, not just a buf copy */
2175 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2176 }
2177
2178 void
2179 unmap(XEvent *ev) {
2180 xw.state &= ~WIN_VISIBLE;
2181 }
2182
2183 void
2184 xseturgency(int add) {
2185 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2186 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2187 XSetWMHints(xw.dpy, xw.win, h);
2188 XFree(h);
2189 }
2190
2191 void
2192 focus(XEvent *ev) {
2193 if(ev->type == FocusIn) {
2194 xw.state |= WIN_FOCUSED;
2195 xseturgency(0);
2196 } else
2197 xw.state &= ~WIN_FOCUSED;
2198 draw();
2199 }
2200
2201 char*
2202 kmap(KeySym k, uint state) {
2203 int i;
2204 state &= ~Mod2Mask;
2205 for(i = 0; i < LEN(key); i++) {
2206 uint mask = key[i].mask;
2207 if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
2208 return (char*)key[i].s;
2209 }
2210 return NULL;
2211 }
2212
2213 void
2214 kpress(XEvent *ev) {
2215 XKeyEvent *e = &ev->xkey;
2216 KeySym ksym;
2217 char buf[32];
2218 char *customkey;
2219 int len;
2220 int meta;
2221 int shift;
2222 Status status;
2223
2224 meta = e->state & Mod1Mask;
2225 shift = e->state & ShiftMask;
2226 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
2227
2228 /* 1. custom keys from config.h */
2229 if((customkey = kmap(ksym, e->state)))
2230 ttywrite(customkey, strlen(customkey));
2231 /* 2. hardcoded (overrides X lookup) */
2232 else
2233 switch(ksym) {
2234 case XK_Up:
2235 case XK_Down:
2236 case XK_Left:
2237 case XK_Right:
2238 /* XXX: shift up/down doesn't work */
2239 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
2240 ttywrite(buf, 3);
2241 break;
2242 case XK_Insert:
2243 if(shift)
2244 selpaste();
2245 break;
2246 case XK_Return:
2247 if(IS_SET(MODE_CRLF))
2248 ttywrite("\r\n", 2);
2249 else
2250 ttywrite("\r", 1);
2251 break;
2252 /* 3. X lookup */
2253 default:
2254 if(len > 0) {
2255 if(meta && len == 1)
2256 ttywrite("\033", 1);
2257 ttywrite(buf, len);
2258 }
2259 break;
2260 }
2261 }
2262
2263 void
2264 cmessage(XEvent *e) {
2265 /* See xembed specs
2266 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2267 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2268 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2269 xw.state |= WIN_FOCUSED;
2270 xseturgency(0);
2271 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2272 xw.state &= ~WIN_FOCUSED;
2273 }
2274 draw();
2275 }
2276 }
2277
2278 void
2279 resize(XEvent *e) {
2280 int col, row;
2281
2282 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2283 return;
2284
2285 xw.w = e->xconfigure.width;
2286 xw.h = e->xconfigure.height;
2287 col = (xw.w - 2*BORDER) / xw.cw;
2288 row = (xw.h - 2*BORDER) / xw.ch;
2289 if(col == term.col && row == term.row)
2290 return;
2291 if(tresize(col, row))
2292 draw();
2293 xresize(col, row);
2294 ttyresize(col, row);
2295 }
2296
2297 bool
2298 last_draw_too_old(void) {
2299 struct timeval now;
2300 gettimeofday(&now, NULL);
2301 return TIMEDIFF(now, xw.lastdraw) >= DRAW_TIMEOUT/1000;
2302 }
2303
2304 void
2305 run(void) {
2306 XEvent ev;
2307 fd_set rfd;
2308 int xfd = XConnectionNumber(xw.dpy);
2309 struct timeval timeout = {0};
2310 bool stuff_to_print = 0;
2311
2312 for(;;) {
2313 FD_ZERO(&rfd);
2314 FD_SET(cmdfd, &rfd);
2315 FD_SET(xfd, &rfd);
2316 timeout.tv_sec = 0;
2317 timeout.tv_usec = SELECT_TIMEOUT;
2318 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, &timeout) < 0) {
2319 if(errno == EINTR)
2320 continue;
2321 die("select failed: %s\n", SERRNO);
2322 }
2323 if(FD_ISSET(cmdfd, &rfd)) {
2324 ttyread();
2325 stuff_to_print = 1;
2326 }
2327
2328 if(stuff_to_print && last_draw_too_old()) {
2329 stuff_to_print = 0;
2330 draw();
2331 }
2332
2333 while(XPending(xw.dpy)) {
2334 XNextEvent(xw.dpy, &ev);
2335 if(XFilterEvent(&ev, xw.win))
2336 continue;
2337 if(handler[ev.type])
2338 (handler[ev.type])(&ev);
2339 }
2340 }
2341 }
2342
2343 int
2344 main(int argc, char *argv[]) {
2345 int i, bitm, xr, yr;
2346 unsigned int wr, hr;
2347
2348 xw.fw = xw.fh = xw.fx = xw.fy = 0;
2349 xw.isfixed = False;
2350
2351 for(i = 1; i < argc; i++) {
2352 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2353 case 't':
2354 if(++i < argc) opt_title = argv[i];
2355 break;
2356 case 'c':
2357 if(++i < argc) opt_class = argv[i];
2358 break;
2359 case 'w':
2360 if(++i < argc) opt_embed = argv[i];
2361 break;
2362 case 'f':
2363 if(++i < argc) opt_io = argv[i];
2364 break;
2365 case 'e':
2366 /* eat every remaining arguments */
2367 if(++i < argc) opt_cmd = &argv[i];
2368 goto run;
2369 case 'g':
2370 if(++i >= argc)
2371 break;
2372
2373 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
2374 if(bitm & XValue)
2375 xw.fx = xr;
2376 if(bitm & YValue)
2377 xw.fy = yr;
2378 if(bitm & WidthValue)
2379 xw.fw = (int)wr;
2380 if(bitm & HeightValue)
2381 xw.fh = (int)hr;
2382 if(bitm & XNegative && xw.fx == 0)
2383 xw.fx = -1;
2384 if(bitm & XNegative && xw.fy == 0)
2385 xw.fy = -1;
2386
2387 if(xw.fh != 0 && xw.fw != 0)
2388 xw.isfixed = True;
2389 break;
2390 case 'v':
2391 default:
2392 die(USAGE);
2393 }
2394 }
2395
2396 run:
2397 setlocale(LC_CTYPE, "");
2398 tnew(80, 24);
2399 ttynew();
2400 xinit();
2401 selinit();
2402 run();
2403 return 0;
2404 }
2405