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    Length: 1866 (0x74a)
    Types: TextFile
    Notes: UNIX file
    Names: »dalert.c«

└─⟦f27320a65⟧ Bits:30001972 Commodore 900 hard disk image with partial source code
    └─⟦2d53db1df⟧ UNIX V7 Filesystem
        └─ ⟦this⟧ »hr/src/desk/dalert.c« 

TextFile

#include	"desk.h"

#define	XMARGIN	(16)
#define	YMARGIN	(16)
#define	ALERT	(5)

struct alert
{
	int	a_rows;		/* number of rows of text	*/
	RECT	a_rect;		/* destination rectangle	*/
	char	**a_str;	/* ptr to string ptr array	*/
};


struct	alert alert[ALERT];	/* alert definitions		*/
int	aln;			/* 1st free alert entry		*/
int	alopen = -1;		/* current open entry		*/


AL_New(nrow, str)
int	nrow;
register char	**str;
{
	register struct alert	*alp;
	register int	height;
	register int	width;
	int	 j;
	RECT	 rect;

	if ( aln == ALERT )
		return -1;
	if ( nrow <= 0 || nrow > 128 || !str )
		return -1;
	alp = &alert[aln];
	alp->a_str = str;
	alp->a_rows = nrow;
	if ( (height = nrow * dskFntH + 2*YMARGIN) > DIS_HEIGHT )
		return -1;
	width = 0;
	while ( nrow-- )
	{
		if ( *str &&  (j = D_StrW(*str, strlen(*str))) > width )
			width = j;
		str++;
	}
	width += 2*XMARGIN;
	if ( width > DIS_WIDTH )
		return -1;

	rect.origin.x = 0;
	rect.origin.y = 0;
	rect.corner.x = width;
	rect.corner.y = height;
	alp->a_rect = R_addp(rect, XMIN + (DIS_WIDTH  - rect.corner.x)/2,
			           YMIN + (DIS_HEIGHT - rect.corner.y)/2 );
	if ( height * words_between(alp->a_rect.origin.x, alp->a_rect.corner.x) 
		 > HEAP )
		return -1;
	return aln++;
}


AL_Open(n)
register int n;
{
	register char **s;
	register int	x, y;
	RECT	rect;

	if ( n >= aln || alopen >= 0 )
		return -1;
	if ( D_Open(&alert[n].a_rect) == -1 )
		return -1;

	dskClip = alert[n].a_rect;
	D_Frame(&dskClip, 3);
	rect = R_inset(dskClip, 4, 4);
	D_Frame(&rect, 3);
	x = alert[n].a_rect.origin.x + XMARGIN;
	y = alert[n].a_rect.origin.y + YMARGIN + dskFntA;
	s = alert[n].a_str;
	n = alert[n].a_rows;

	while ( n-- )
	{
		if ( *s )
		{
			D_Str(*s, strlen(*s), x, y);
		}
		s++;
		y += dskFntH;
	}
	alopen = n;
	return 0;
}


AL_Close()
{
	if ( alopen == 1 )
		return;
	D_Close(&dskClip, 0);
	alopen = -1;
}