public static IEnumerable <PageRegion> UnionPageRegions(
this IEnumerable <PageRegion> pageRegions,
Margin contentMargin)
{
var unioned = pageRegions
.GroupBy(pr => pr.PagePosition)
.Select(grp =>
{
var rectangle = Rectangle.Union(grp.Select(r => r.Region));
return(new PageRegion(grp.Key, rectangle));
})
.Select((pr, i) =>
{
var top = i == 0
? contentMargin.Top
: 0;
var npr = new PageRegion(pr.PagePosition, pr.Region.Inflate(top, contentMargin.Right, 0, contentMargin.Left));
return(npr);
})
.ToArray();
var last = unioned.Last();
unioned[unioned.Length - 1] = new PageRegion(last.PagePosition, last.Region.Inflate(0, 0, contentMargin.Bottom, 0));
return(unioned);
}
protected void SetPageRegion(PageRegion pageRegion)
{
this.PageRegions = this.PageRegions
.Where(pr => pr.PagePosition != pageRegion.PagePosition)
.Union(new[] { pageRegion })
.OrderBy(pr => pr.PagePosition)
.ToArray();
}