/// <summary>
/// Create a new <see cref="TrailerDictionary"/>.
/// </summary>
/// <param name="dictionary">The parsed dictionary from the document.</param>
internal TrailerDictionary(DictionaryToken dictionary)
{
if (dictionary == null)
{
throw new ArgumentNullException(nameof(dictionary));
}
Size = dictionary.GetInt(NameToken.Size);
PreviousCrossReferenceOffset = dictionary.GetLongOrDefault(NameToken.Prev);
if (!dictionary.TryGet(NameToken.Root, out IndirectReferenceToken rootReference))
{
throw new PdfDocumentFormatException($"No root token was found in the trailer dictionary: {dictionary}.");
}
Root = rootReference.Data;
if (dictionary.TryGet(NameToken.Info, out IndirectReferenceToken reference))
{
Info = reference.Data;
}
if (dictionary.TryGet(NameToken.Id, out ArrayToken arr))
{
var ids = new List <string>(arr.Data.Count);
foreach (var token in arr.Data)
{
if (token is StringToken str)
{
ids.Add(str.Data);
}
else if (token is HexToken hex)
{
ids.Add(hex.Data);
}
}
Identifier = ids;
}
else
{
Identifier = EmptyArray <string> .Instance;
}
if (dictionary.TryGet(NameToken.Encrypt, out var encryptionToken))
{
EncryptionToken = encryptionToken;
}
}