/// <summary>
/// Create a new <see cref="CatalogDictionary"/>.
/// </summary>
internal Catalog(DictionaryToken catalogDictionary, DictionaryToken pagesDictionary,
PageTreeNode pageTree)
{
CatalogDictionary = catalogDictionary ?? throw new ArgumentNullException(nameof(catalogDictionary));
PagesDictionary = pagesDictionary ?? throw new ArgumentNullException(nameof(pagesDictionary));
PageTree = pageTree ?? throw new ArgumentNullException(nameof(pageTree));
if (!pageTree.IsRoot)
{
throw new ArgumentException("Page tree must be the root page tree node.", nameof(pageTree));
}
var byNumber = new Dictionary <int, PageTreeNode>();
PopulatePageByNumberDictionary(pageTree, byNumber);
pagesByNumber = byNumber;
}
private static void PopulatePageByNumberDictionary(PageTreeNode node, Dictionary <int, PageTreeNode> result)
{
if (node.IsPage)
{
if (!node.PageNumber.HasValue)
{
throw new InvalidOperationException($"Node was page but did not have page number: {node}.");
}
result[node.PageNumber.Value] = node;
return;
}
foreach (var child in node.Children)
{
PopulatePageByNumberDictionary(child, result);
}
}