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skip unrelated entries in document name tree

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This commit is contained in:
Eliot Jones
2019-12-05 13:47:42 +00:00
parent 2e5c995322
commit 8ca947542f
1 changed files with 59 additions and 65 deletions
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124
src/UglyToad.PdfPig/Outline/BookmarksProvider.cs
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@@ -5,7 +5,6 @@
using Exceptions;
using Logging;
using Parser.Parts;
using System;
using System.Collections.Generic;
using Tokenization.Scanner;
using Tokens;
@@ -91,16 +90,15 @@
BookmarkNode bookmark;
if (nodeDictionary.TryGet(NameToken.Dest, pdfScanner, out ArrayToken destArray))
if (nodeDictionary.TryGet(NameToken.Dest, pdfScanner, out ArrayToken destArray)
&& TryGetExplicitDestination(destArray, catalog, log, out var destination))
{
var destination = GetExplicitDestination(destArray, catalog, isLenientParsing, log);
bookmark = new DocumentBookmarkNode(title, level, destination, children);
}
else if (nodeDictionary.TryGet(NameToken.Dest, pdfScanner, out IDataToken<string> destStringToken))
{
// 12.3.2.3 Named Destinations
if (namedDestinations.TryGetValue(destStringToken.Data, out var destination))
if (namedDestinations.TryGetValue(destStringToken.Data, out destination))
{
bookmark = new DocumentBookmarkNode(title, level, destination, children);
}
@@ -114,8 +112,7 @@
}
}
else if (nodeDictionary.TryGet(NameToken.A, pdfScanner, out DictionaryToken actionDictionary)
&& TryGetAction(actionDictionary, catalog, pdfScanner, isLenientParsing, namedDestinations,
log, out var actionResult))
&& TryGetAction(actionDictionary, catalog, pdfScanner, namedDestinations, log, out var actionResult))
{
if (actionResult.isExternal)
{
@@ -186,14 +183,10 @@
{
var value = kvp.Value;
if (TryReadExplicitDestination(value, catalog, pdfScanner, isLenientParsing, log, out var destination))
if (TryReadExplicitDestination(value, catalog, pdfScanner, log, out var destination))
{
result[kvp.Key] = destination;
}
else if (!isLenientParsing)
{
throw new PdfDocumentFormatException($"Failed to find explicit destination for value '{value}' in: {dests}.");
}
}
}
else if (catalog.CatalogDictionary.TryGet(NameToken.Names, pdfScanner, out DictionaryToken names)
@@ -222,24 +215,15 @@
{
if (!(nodeNames[i] is IDataToken<string> key))
{
if (isLenientParsing)
{
continue;
}
throw new PdfDocumentFormatException($"Invalid key '{nodeNames[i]}' in names tree for explicit destinations: {nameTreeNodeDictionary}.");
continue;
}
var value = nodeNames[i + 1];
if (TryReadExplicitDestination(value, catalog, pdfScanner, isLenientParsing, log, out var destination))
if (TryReadExplicitDestination(value, catalog, pdfScanner, log, out var destination))
{
explicitDestinations[key.Data] = destination;
}
else if (!isLenientParsing)
{
throw new PdfDocumentFormatException($"Failed to find explicit destination for value '{value}' in: {nameTreeNodeDictionary}.");
}
}
}
@@ -260,42 +244,41 @@
}
private static bool TryReadExplicitDestination(IToken value, Catalog catalog, IPdfTokenScanner pdfScanner,
bool isLenientParsing, ILog log, out ExplicitDestination destination)
ILog log, out ExplicitDestination destination)
{
if (DirectObjectFinder.TryGet(value, pdfScanner, out ArrayToken valueArray))
destination = null;
if (DirectObjectFinder.TryGet(value, pdfScanner, out ArrayToken valueArray)
&& TryGetExplicitDestination(valueArray, catalog, log, out destination))
{
destination = GetExplicitDestination(valueArray, catalog, isLenientParsing, log);
return true;
}
if (DirectObjectFinder.TryGet(value, pdfScanner, out DictionaryToken valueDictionary)
&& valueDictionary.TryGet(NameToken.D, pdfScanner, out valueArray))
&& valueDictionary.TryGet(NameToken.D, pdfScanner, out valueArray)
&& TryGetExplicitDestination(valueArray, catalog, log, out destination))
{
destination = GetExplicitDestination(valueArray, catalog, isLenientParsing, log);
return true;
}
destination = null;
return false;
}
private static ExplicitDestination GetExplicitDestination(ArrayToken explicitDestinationArray, Catalog catalog,
bool isLenientParsing,
ILog log)
private static bool TryGetExplicitDestination(ArrayToken explicitDestinationArray, Catalog catalog,
ILog log,
out ExplicitDestination destination)
{
if (explicitDestinationArray == null)
destination = null;
if (explicitDestinationArray == null || explicitDestinationArray.Length == 0)
{
throw new ArgumentNullException(nameof(explicitDestinationArray));
return false;
}
if (explicitDestinationArray.Length == 0)
{
throw new ArgumentException("Invalid (empty) array for an explicit destination.", nameof(explicitDestinationArray));
}
var pageNumber = 1;
int pageNumber;
var pageToken = explicitDestinationArray[0];
if (pageToken is IndirectReferenceToken pageIndirectReferenceToken)
{
pageNumber = catalog.GetPageByReference(pageIndirectReferenceToken.Data).PageNumber ?? 1;
@@ -306,27 +289,23 @@
}
else
{
var errorMessage = $"{nameof(GetExplicitDestination)} No page number given in 'Dest': '{explicitDestinationArray}'.";
if (!isLenientParsing)
{
throw new PdfDocumentFormatException(errorMessage);
}
var errorMessage = $"{nameof(TryGetExplicitDestination)} No page number given in 'Dest': '{explicitDestinationArray}'.";
log.Error(errorMessage);
return false;
}
var destTypeToken = explicitDestinationArray[1] as NameToken;
if (destTypeToken == null)
{
var errorMessage = $"Missing name token as second argument to explicit destination: {explicitDestinationArray}.";
if (!isLenientParsing)
{
throw new PdfDocumentFormatException(errorMessage);
}
log.Error(errorMessage);
return new ExplicitDestination(pageNumber, ExplicitDestinationType.FitPage, ExplicitDestinationCoordinates.Empty);
destination = new ExplicitDestination(pageNumber, ExplicitDestinationType.FitPage, ExplicitDestinationCoordinates.Empty);
return true;
}
if (destTypeToken.Equals(NameToken.XYZ))
@@ -335,31 +314,39 @@
var left = explicitDestinationArray[2] as NumericToken;
var top = explicitDestinationArray[3] as NumericToken;
return new ExplicitDestination(pageNumber, ExplicitDestinationType.XyzCoordinates,
destination = new ExplicitDestination(pageNumber, ExplicitDestinationType.XyzCoordinates,
new ExplicitDestinationCoordinates(left?.Data, top?.Data));
return true;
}
if (destTypeToken.Equals(NameToken.Fit))
{
// [page /Fit]
return new ExplicitDestination(pageNumber, ExplicitDestinationType.FitPage,
destination = new ExplicitDestination(pageNumber, ExplicitDestinationType.FitPage,
ExplicitDestinationCoordinates.Empty);
return true;
}
if (destTypeToken.Equals(NameToken.FitH))
{
// [page /FitH top]
var top = explicitDestinationArray[2] as NumericToken;
return new ExplicitDestination(pageNumber, ExplicitDestinationType.FitHorizontally,
destination = new ExplicitDestination(pageNumber, ExplicitDestinationType.FitHorizontally,
new ExplicitDestinationCoordinates(null, top?.Data));
return true;
}
if (destTypeToken.Equals(NameToken.FitV))
{
// [page /FitV left]
var left = explicitDestinationArray[2] as NumericToken;
return new ExplicitDestination(pageNumber, ExplicitDestinationType.FitVertically,
destination = new ExplicitDestination(pageNumber, ExplicitDestinationType.FitVertically,
new ExplicitDestinationCoordinates(left?.Data));
return true;
}
if (destTypeToken.Equals(NameToken.FitR))
@@ -370,37 +357,44 @@
var right = explicitDestinationArray[4] as NumericToken;
var top = explicitDestinationArray[5] as NumericToken;
return new ExplicitDestination(pageNumber, ExplicitDestinationType.FitRectangle,
destination = new ExplicitDestination(pageNumber, ExplicitDestinationType.FitRectangle,
new ExplicitDestinationCoordinates(left?.Data, top?.Data, right?.Data, bottom?.Data));
return true;
}
if (destTypeToken.Equals(NameToken.FitB))
{
// [page /FitB]
return new ExplicitDestination(pageNumber, ExplicitDestinationType.FitBoundingBox,
destination = new ExplicitDestination(pageNumber, ExplicitDestinationType.FitBoundingBox,
ExplicitDestinationCoordinates.Empty);
return true;
}
if (destTypeToken.Equals(NameToken.FitBH))
{
// [page /FitBH top]
return new ExplicitDestination(pageNumber, ExplicitDestinationType.FitBoundingBoxHorizontally,
destination = new ExplicitDestination(pageNumber, ExplicitDestinationType.FitBoundingBoxHorizontally,
new ExplicitDestinationCoordinates(null, (explicitDestinationArray[2] as NumericToken)?.Data));
return true;
}
if (destTypeToken.Equals(NameToken.FitBV))
{
// [page /FitBV left]
return new ExplicitDestination(pageNumber, ExplicitDestinationType.FitBoundingBoxVertically,
destination = new ExplicitDestination(pageNumber, ExplicitDestinationType.FitBoundingBoxVertically,
new ExplicitDestinationCoordinates((explicitDestinationArray[2] as NumericToken)?.Data));
return true;
}
throw new PdfDocumentFormatException($"Unknown explicit destination type: {destTypeToken}.");
return false;
}
#endregion
private static bool TryGetAction(DictionaryToken actionDictionary, Catalog catalog, IPdfTokenScanner pdfScanner,
bool isLenientParsing,
IReadOnlyDictionary<string, ExplicitDestination> namedDestinations,
ILog log,
out (bool isExternal, string externalFileName, ExplicitDestination destination) result)
@@ -414,16 +408,16 @@
if (actionType.Equals(NameToken.GoTo))
{
if (actionDictionary.TryGet(NameToken.D, pdfScanner, out ArrayToken destinationArray))
if (actionDictionary.TryGet(NameToken.D, pdfScanner, out ArrayToken destinationArray)
&& TryGetExplicitDestination(destinationArray, catalog, log, out var destination))
{
var destination = GetExplicitDestination(destinationArray, catalog, isLenientParsing, log);
result = (false, null, destination);
return true;
}
else if (actionDictionary.TryGet(NameToken.D, pdfScanner, out IDataToken<string> destinationName)
&& namedDestinations.TryGetValue(destinationName.Data, out var destination))
if (actionDictionary.TryGet(NameToken.D, pdfScanner, out IDataToken<string> destinationName)
&& namedDestinations.TryGetValue(destinationName.Data, out destination))
{
result = (false, null, destination);