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