// returns the top parent to include in the catalog
internal PdfIndirectReference WritePageTree()
{
if (pages.Count == 0)
{
throw new IOException("The document has no pages.");
}
int leaf = 1;
ArrayList tParents = parents;
ArrayList tPages = pages;
ArrayList nextParents = new ArrayList();
while (true)
{
leaf *= leafSize;
int stdCount = leafSize;
int rightCount = tPages.Count % leafSize;
if (rightCount == 0)
{
rightCount = leafSize;
}
for (int p = 0; p < tParents.Count; ++p)
{
int count;
int thisLeaf = leaf;
if (p == tParents.Count - 1)
{
count = rightCount;
thisLeaf = pages.Count % leaf;
if (thisLeaf == 0)
{
thisLeaf = leaf;
}
}
else
{
count = stdCount;
}
PdfDictionary top = new PdfDictionary(PdfName.PAGES);
top.Put(PdfName.COUNT, new PdfNumber(thisLeaf));
PdfArray kids = new PdfArray();
ArrayList intern = kids.ArrayList;
intern.AddRange(tPages.GetRange(p * stdCount, count));
top.Put(PdfName.KIDS, kids);
if (tParents.Count > 1)
{
if ((p % leafSize) == 0)
{
nextParents.Add(writer.PdfIndirectReference);
}
top.Put(PdfName.PARENT, (PdfIndirectReference)nextParents[p / leafSize]);
}
else
{
top.Put(PdfName.ITXT, new PdfString(Document.Release));
}
writer.AddToBody(top, (PdfIndirectReference)tParents[p]);
}
if (tParents.Count == 1)
{
topParent = (PdfIndirectReference)tParents[0];
return(topParent);
}
tPages = tParents;
tParents = nextParents;
nextParents = new ArrayList();
}
}
