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StructTreeRoot element with null role , null ref bug with legacy pdf #20

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StructTreeRoot element with null role , null ref bug with legacy pdf #20

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5 changes: 3 additions & 2 deletions itext/itext.kernel/itext/kernel/pdf/tagutils/TagStructureContext.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -49,6 +49,7 @@ source product.
using iText.Kernel.Pdf;
using iText.Kernel.Pdf.Annot;
using iText.Kernel.Pdf.Tagging;
using System.Linq;

namespace iText.Kernel.Pdf.Tagutils {
/// <summary>
Expand Down Expand Up @@ -592,8 +593,8 @@ public virtual void NormalizeDocumentRootTag() {
IList<IStructureNode> rootKids = document.GetStructTreeRoot().GetKids();
IRoleMappingResolver mapping = null;
if (rootKids.Count > 0) {
PdfStructElem firstKid = (PdfStructElem)rootKids[0];
mapping = ResolveMappingToStandardOrDomainSpecificRole(firstKid.GetRole().GetValue(), firstKid.GetNamespace
PdfStructElem firstKid = (PdfStructElem)rootKids.Where(r => r.GetRole() != null).FirstOrDefault();
mapping = ResolveMappingToStandardOrDomainSpecificRole(firstKid.GetRole()?.GetValue(), firstKid.GetNamespace
());
}
if (rootKids.Count == 1 && mapping != null && mapping.CurrentRoleIsStandard() && IsRoleAllowedToBeRoot(mapping
Expand Down