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#437 actually use code written for multi-part xref tables and fix bug

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This commit is contained in:
Eliot Jones
2022-04-22 16:32:38 -04:00
parent a12fc0ce34
commit 26f028c421
1 changed files with 514 additions and 547 deletions
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119
src/UglyToad.PdfPig/Writer/TokenWriter.cs
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@@ -151,80 +151,6 @@
outputStream.Write(Xref, 0, Xref.Length);
WriteLineBreak(outputStream);
WriteLong(0, outputStream);
WriteWhitespace(outputStream);
// 1 extra for the free entry.
WriteLong(objectOffsets.Count + 1, outputStream);
WriteWhitespace(outputStream);
WriteLineBreak(outputStream);
WriteFirstXrefEmptyEntry(outputStream);
foreach (var keyValuePair in objectOffsets.OrderBy(x => x.Key.ObjectNumber))
{
/*
* nnnnnnnnnn ggggg n eol
* where:
* nnnnnnnnnn is a 10-digit byte offset
* ggggg is a 5-digit generation number
* n is a literal keyword identifying this as an in-use entry
* eol is a 2-character end-of-line sequence ('\r\n' or ' \n')
*/
var paddedOffset = OtherEncodings.StringAsLatin1Bytes(keyValuePair.Value.ToString("D10"));
outputStream.Write(paddedOffset, 0, paddedOffset.Length);
WriteWhitespace(outputStream);
var generation = OtherEncodings.StringAsLatin1Bytes(keyValuePair.Key.Generation.ToString("D5"));
outputStream.Write(generation, 0, generation.Length);
WriteWhitespace(outputStream);
outputStream.WriteByte(InUseEntry);
WriteWhitespace(outputStream);
WriteLineBreak(outputStream);
}
outputStream.Write(Trailer, 0, Trailer.Length);
WriteLineBreak(outputStream);
var identifier = new ArrayToken(new IToken[]
{
new HexToken(Guid.NewGuid().ToString("N").ToCharArray()),
new HexToken(Guid.NewGuid().ToString("N").ToCharArray())
});
var trailerDictionaryData = new Dictionary<NameToken, IToken>
{
// 1 for the free entry.
{NameToken.Size, new NumericToken(objectOffsets.Count + 1)},
{NameToken.Root, new IndirectReferenceToken(catalogToken)},
{NameToken.Id, identifier}
};
if (documentInformationReference.HasValue)
{
trailerDictionaryData[NameToken.Info] = new IndirectReferenceToken(documentInformationReference.Value);
}
var trailerDictionary = new DictionaryToken(trailerDictionaryData);
WriteDictionary(trailerDictionary, outputStream);
WriteLineBreak(outputStream);
outputStream.Write(StartXref, 0, StartXref.Length);
WriteLineBreak(outputStream);
WriteLong(position, outputStream);
WriteLineBreak(outputStream);
// Complete!
outputStream.Write(Eof, 0, Eof.Length);
}
private static void WriteCrossReferenceTable(IReadOnlyDictionary<IndirectReference, long> objectOffsets, Stream outputStream)
{
var sets = new List<XrefSeries>();
var orderedList = objectOffsets.OrderBy(x => x.Key.ObjectNumber).ToList();
@@ -258,11 +184,16 @@
}
}
if (items.Count > 0)
{
sets.Add(new XrefSeries(firstObjectNumber, items));
}
foreach (var series in sets)
{
WriteLong(0, outputStream);
WriteLong(series.First, outputStream);
WriteWhitespace(outputStream);
// 1 extra for the free entry.
WriteLong(series.Offsets.Count, outputStream);
WriteWhitespace(outputStream);
@@ -302,6 +233,42 @@
}
}
}
outputStream.Write(Trailer, 0, Trailer.Length);
WriteLineBreak(outputStream);
var identifier = new ArrayToken(new IToken[]
{
new HexToken(Guid.NewGuid().ToString("N").ToCharArray()),
new HexToken(Guid.NewGuid().ToString("N").ToCharArray())
});
var trailerDictionaryData = new Dictionary<NameToken, IToken>
{
// 1 for the free entry.
{NameToken.Size, new NumericToken(objectOffsets.Count + 1)},
{NameToken.Root, new IndirectReferenceToken(catalogToken)},
{NameToken.Id, identifier}
};
if (documentInformationReference.HasValue)
{
trailerDictionaryData[NameToken.Info] = new IndirectReferenceToken(documentInformationReference.Value);
}
var trailerDictionary = new DictionaryToken(trailerDictionaryData);
WriteDictionary(trailerDictionary, outputStream);
WriteLineBreak(outputStream);
outputStream.Write(StartXref, 0, StartXref.Length);
WriteLineBreak(outputStream);
WriteLong(position, outputStream);
WriteLineBreak(outputStream);
// Complete!
outputStream.Write(Eof, 0, Eof.Length);
}
/// <summary>