IEnumerable <GridElement> GetRowElements()
{
var rowLength = 0;
while (ChildrenQueue.Any())
{
var element = ChildrenQueue.Peek();
if (rowLength + element.Columns > ColumnsCount)
{
break;
}
rowLength += element.Columns;
yield return(ChildrenQueue.Dequeue());
}
}
internal override SpacePlan Measure(Size availableSpace)
{
if (!ChildrenQueue.Any())
{
return(SpacePlan.FullRender(Size.Zero));
}
var lines = Compose(availableSpace);
if (!lines.Any())
{
return(SpacePlan.Wrap());
}
var lineSizes = lines
.Select(line =>
{
var size = GetLineSize(line);
var widthWithSpacing = size.Width + (line.Count - 1) * HorizontalSpacing;
return(new Size(widthWithSpacing, size.Height));
})
.ToList();
var width = lineSizes.Max(x => x.Width);
var height = lineSizes.Sum(x => x.Height) + (lines.Count - 1) * VerticalSpacing;
var targetSize = new Size(width, height);
var isPartiallyRendered = lines.Sum(x => x.Count) != ChildrenQueue.Count;
if (isPartiallyRendered)
{
return(SpacePlan.PartialRender(targetSize));
}
return(SpacePlan.FullRender(targetSize));
}