lsm/PdfPig
1
0
Fork 0
mirror of https://github.com/UglyToad/PdfPig.git synced 2025-09-19 19:07:56 +08:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity

Remove dead code

Browse Source
This commit is contained in:
Inusual
2020-02-28 20:18:43 -04:00
committed by Eliot Jones
parent 932857cf8c
commit 439a186ed7
1 changed files with 7 additions and 84 deletions
Download Patch File Download Diff File Expand all files Collapse all files

91
src/UglyToad.PdfPig/Writer/PdfMerger.cs
View File

@@ -1,4 +1,4 @@
namespace UglyToad.PdfPig.Writer namespace UglyToad.PdfPig.Writer
{ {
using System; using System;
using System.Collections.Generic; using System.Collections.Generic;
@@ -75,52 +75,22 @@
var version = FileHeaderParser.Parse(coreScanner, true, Log); var version = FileHeaderParser.Parse(coreScanner, true, Log);
var bruteForceSearcher = new BruteForceSearcher(inputBytes); var bruteForceSearcher = new BruteForceSearcher(inputBytes);
var xrefValidator = new XrefOffsetValidator(Log); var crossReferenceParser = new CrossReferenceParser(Log, new XrefOffsetValidator(Log), new XrefCosOffsetChecker(Log, bruteForceSearcher),
var objectChecker = new XrefCosOffsetChecker(Log, bruteForceSearcher); new Parser.Parts.CrossReference.CrossReferenceStreamParser(FilterProvider));
var crossReferenceParser = new CrossReferenceParser(Log, xrefValidator, objectChecker, new Parser.Parts.CrossReference.CrossReferenceStreamParser(FilterProvider));
var crossReferenceOffset = FileTrailerParser.GetFirstCrossReferenceOffset(inputBytes, coreScanner, isLenientParsing);
var objectLocations = bruteForceSearcher.GetObjectLocations();
CrossReferenceTable crossReference = null; CrossReferenceTable crossReference = null;
var locationProvider = new ObjectLocationProvider(() => crossReference, bruteForceSearcher); var locationProvider = new ObjectLocationProvider(() => crossReference, bruteForceSearcher);
// I'm not using the BruteForceObjectLocationProvider because, the offset that it give are wrong by +2
// var locationProvider = new BruteForcedObjectLocationProvider(objectLocations);
var pdfScanner = new PdfTokenScanner(inputBytes, locationProvider, FilterProvider, NoOpEncryptionHandler.Instance); var pdfScanner = new PdfTokenScanner(inputBytes, locationProvider, FilterProvider, NoOpEncryptionHandler.Instance);
var crossReferenceOffset = FileTrailerParser.GetFirstCrossReferenceOffset(inputBytes, coreScanner, isLenientParsing);
crossReference = crossReferenceParser.Parse(inputBytes, isLenientParsing, crossReferenceOffset, version.OffsetInFile, pdfScanner, coreScanner); crossReference = crossReferenceParser.Parse(inputBytes, isLenientParsing, crossReferenceOffset, version.OffsetInFile, pdfScanner, coreScanner);
var trailerDictionary = crossReference.Trailer; var catalogDictionaryToken = ParseCatalog(crossReference, pdfScanner, out var encryptionDictionary);
var (trailerRef, catalogDictionaryToken) = ParseCatalog(crossReference, pdfScanner, out var encryptionDictionary);
if (encryptionDictionary != null) if (encryptionDictionary != null)
{ {
// TODO: Find option of how to pass password for the documents...
throw new PdfDocumentEncryptedException("Unable to merge document with password"); throw new PdfDocumentEncryptedException("Unable to merge document with password");
// pdfScanner.UpdateEncryptionHandler(new EncryptionHandler(encryptionDictionary, trailerDictionary, new[] { string.Empty }));
}
var objectsLocation = bruteForceSearcher.GetObjectLocations();
var root = pdfScanner.Get(trailerDictionary.Root);
var tokens = new List<IToken>();
pdfScanner.Seek(0);
while (pdfScanner.MoveNext())
{
tokens.Add(pdfScanner.CurrentToken);
}
if (!(tokens.Count == objectLocations.Count))
{
// Do we really need to check this?
throw new PdfDocumentFormatException("Something whent wrong while reading file");
} }
var documentCatalog = CatalogFactory.Create(crossReference.Trailer.Root, catalogDictionaryToken, pdfScanner, isLenientParsing); var documentCatalog = CatalogFactory.Create(crossReference.Trailer.Root, catalogDictionaryToken, pdfScanner, isLenientParsing);
@@ -132,7 +102,7 @@
} }
// This method is a basically a copy of the method UglyToad.PdfPig.Parser.PdfDocumentFactory.ParseTrailer() // This method is a basically a copy of the method UglyToad.PdfPig.Parser.PdfDocumentFactory.ParseTrailer()
private static (IndirectReference, DictionaryToken) ParseCatalog(CrossReferenceTable crossReferenceTable, private static DictionaryToken ParseCatalog(CrossReferenceTable crossReferenceTable,
IPdfTokenScanner pdfTokenScanner, IPdfTokenScanner pdfTokenScanner,
out EncryptionDictionary encryptionDictionary) out EncryptionDictionary encryptionDictionary)
{ {
@@ -156,7 +126,7 @@
rootDictionary = rootDictionary.With(NameToken.Type, NameToken.Catalog); rootDictionary = rootDictionary.With(NameToken.Type, NameToken.Catalog);
} }
return (crossReferenceTable.Trailer.Root, rootDictionary); return rootDictionary;
} }
private class DocumentMerger private class DocumentMerger
@@ -293,7 +263,6 @@
{ {
var tokenObject = DirectObjectFinder.Get<IToken>(referenceToken.Data, tokenScanner); var tokenObject = DirectObjectFinder.Get<IToken>(referenceToken.Data, tokenScanner);
// Is this even a allowed?
Debug.Assert(!(tokenObject is IndirectReferenceToken)); Debug.Assert(!(tokenObject is IndirectReferenceToken));
var newToken = CopyToken(tokenObject, tokenScanner); var newToken = CopyToken(tokenObject, tokenScanner);
@@ -302,14 +271,12 @@
} }
else if (tokenToCopy is StreamToken streamToken) else if (tokenToCopy is StreamToken streamToken)
{ {
//Note: Unnecessary
var properties = CopyToken(streamToken.StreamDictionary, tokenScanner) as DictionaryToken; var properties = CopyToken(streamToken.StreamDictionary, tokenScanner) as DictionaryToken;
Debug.Assert(properties != null); Debug.Assert(properties != null);
return new StreamToken(properties, new List<byte>(streamToken.Data)); 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 this tokens?
return tokenToCopy; return tokenToCopy;
} }
} }
@@ -372,49 +339,5 @@
} }
} }
} }
// Currently unused becauase, brute force search give the wrong offset (+2)
private class BruteForcedObjectLocationProvider : IObjectLocationProvider
{
private readonly Dictionary<IndirectReference, long> objectLocations;
private readonly Dictionary<IndirectReference, ObjectToken> cache = new Dictionary<IndirectReference, ObjectToken>();
public BruteForcedObjectLocationProvider(IReadOnlyDictionary<IndirectReference, long> objectLocations)
{
this.objectLocations = objectLocations.ToDictionary(x => x.Key, x => x.Value);
}
public bool TryGetOffset(IndirectReference reference, out long offset)
{
var result = objectLocations.TryGetValue(reference, out offset);
//offset -= 2;
return result;
}
public void UpdateOffset(IndirectReference reference, long offset)
{
objectLocations[reference] = offset;
}
public bool TryGetCached(IndirectReference reference, out ObjectToken objectToken)
{
return cache.TryGetValue(reference, out objectToken);
}
public void Cache(ObjectToken objectToken, bool force = false)
{
if (!TryGetOffset(objectToken.Number, out var offsetExpected) || force)
{
cache[objectToken.Number] = objectToken;
}
if (offsetExpected != objectToken.Position)
{
return;
}
cache[objectToken.Number] = objectToken;
}
}
} }
} }