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Add StreamToken as exception to CopyTokenq

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Add summary to better explain CopyToken purpose
This commit is contained in:
Inusual
2020-02-24 21:07:23 -04:00
committed by Eliot Jones
parent 669742b6bd
commit 6e0caee317
1 changed files with 12 additions and 2 deletions
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14
src/UglyToad.PdfPig/Writer/PdfMerger.cs
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@@ -264,6 +264,13 @@
return Context.WriteObject(Memory, new DictionaryToken(pageDictionary)); return Context.WriteObject(Memory, new DictionaryToken(pageDictionary));
} }
/// <summary>
/// The purpose of this method is to resolve indirect reference. That mean copy the reference's content to the new document's stream
/// and replace the indirect reference with the correct/new one
/// </summary>
/// <param name="tokenToCopy">Token to inspect for reference</param>
/// <param name="tokenScanner">scanner get the content from the original document</param>
/// <returns>A copy of the token with all his content copied to the new document's stream</returns>
private IToken CopyToken(IToken tokenToCopy, IPdfTokenScanner tokenScanner) private IToken CopyToken(IToken tokenToCopy, IPdfTokenScanner tokenScanner)
{ {
if (tokenToCopy is DictionaryToken dictionaryToken) if (tokenToCopy is DictionaryToken dictionaryToken)
@@ -301,11 +308,14 @@
} }
else if (tokenToCopy is StreamToken streamToken) else if (tokenToCopy is StreamToken streamToken)
{ {
return streamToken; //Note: Unnecessary
var properties = CopyToken(streamToken.StreamDictionary, tokenScanner) as DictionaryToken;
Debug.Assert(properties != null);
return new StreamToken(properties, new List<byte>(streamToken.Data));
} }
else // Non Complex Token - BooleanToken, NumericToken, NameToken, Etc... else // Non Complex Token - BooleanToken, NumericToken, NameToken, Etc...
{ {
// TODO: Should we do a deep copy of the token? // TODO: Should we do a deep copy of this tokens?
return tokenToCopy; return tokenToCopy;
} }
} }