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	frinit.c - sam - An updated version of the sam text editor.
	git clone git://vernunftzentrum.de/sam.git
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	---
	frinit.c (1199B)
	---
	1 /* Copyright (c) 1998 Lucent Technologies - All rights reserved. */
	2 #include <u.h>
	3 #include <libg.h>
	4 #include <frame.h>
	5
	6 int tabwidth = 8;
	7 extern bool expandtabs;
	8
	9 void
	10 frinit(Frame f, Rectangle r, XftFont ft, Bitmap *b, uint64_t bg)
	11 {
	12 int tabs = atoi(getenv("TABS") ? getenv("TABS") : "");
	13 if (tabs < 0){
	14 tabs = -tabs;
	15 expandtabs = true;
	16 }
	17
	18 if (tabs > 0 && tabs <= 12)
	19 tabwidth = tabs;
	20
	21 f->font = ft;
	22 /* ft->height is NOT CORRECT; we must use ascent + descent to
	23 clear the lowest edge of characters. - cks */
	24 f->fheight = ft->ascent + ft->descent;
	25 f->maxtab = tabwidth*charwidth(ft, '0');
	26 f->nbox = 0;
	27 f->nalloc = 0;
	28 f->nchars = 0;
	29 f->nlines = 0;
	30 f->p0 = 0;
	31 f->p1 = 0;
	32 f->box = 0;
	33 f->lastlinefull = 0;
	34 f->bg = bg;
	35 frsetrects(f, r, b);
	36 }
	37
	38 void
	39 frsetrects(Frame f, Rectangle r, Bitmap b)
	40 {
	41 f->b = b;
	42 f->entire = r;
	43 f->r = r;
	44 f->r.max.y -= (r.max.y-r.min.y)%f->fheight;
	45 f->left = r.min.x+1;
	46 f->maxlines = (r.max.y-r.min.y)/f->fheight;
	47 }
	48
	49 void
	50 frclear(Frame *f)
	51 {
	52 if(f->nbox)
	53 _frdelbox(f, 0, f->nbox-1);
	54 if(f->box)
	55 free(f->box);
	56 f->box = 0;
	57 }