ArgumentException is thrown due to an element with an already existing parent while trying to split a table across pages.

Right alignment in a table does not work when converting from html to pdf

When importing HTML content to a RadFlowDocument and exporting it to PDF format, the following error message occurs:

System.ArgumentException: 'The document element is associated with another parent. (Parameter 'item')'

   at Telerik.Windows.Documents.Fixed.Model.Collections.DocumentElementCollection`2.VerifyDocumentElementOnInsert(T item)
   at Telerik.Windows.Documents.Core.Data.DocumentElementCollectionBase`2.Add(T item)
   at Telerik.Windows.Documents.Fixed.Model.Editing.FixedContentEditor.Append(PositionContentElement element)
   at Telerik.Windows.Documents.Fixed.Model.Editing.FixedContentEditor.Draw(PositionContentElement element)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Layout.ContentElementLayoutElementBase`1.Draw(DrawLayoutElementContext context)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Block.Draw(IEnumerable`1 lineElements, DrawLayoutElementContext context)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Block.DrawInternal(FixedContentEditor editor, Rect boundingRect)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Block.Draw(FixedContentEditor editor, Rect boundingRect)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.TableCell.Draw(FixedContentEditor editor)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.Table.DrawCellContent(FixedContentEditor editor, TableCell cell)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.Table.DrawTableCells(FixedContentEditor editor, Int32 rowIndex, TableCellCollection cells)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.Table.DrawTableRows(FixedContentEditor editor)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.Table.DrawInternal(FixedContentEditor editor, Rect boundingRect)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.Table.Draw(FixedContentEditor editor, Rect boundingRect)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.TableCell.Draw(FixedContentEditor editor)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.Table.DrawCellContent(FixedContentEditor editor, TableCell cell)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.Table.DrawTableCells(FixedContentEditor editor, Int32 rowIndex, TableCellCollection cells)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.Table.DrawTableRows(FixedContentEditor editor)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.Table.DrawInternal(FixedContentEditor editor, Rect boundingRect)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.Table.Telerik.Windows.Documents.Fixed.Model.Editing.Flow.IDrawArrangedElement.DrawArrangedElement(FixedContentEditor editor, Rect boundingRect)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Flow.SectionInfo.DrawArrangedElement(IBlockElement blockElement, Double horizontalOffset, Double verticalOffset)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Utils.SectionInfoExtensions.DrawArrangedElements(SectionInfo section, IList`1 elements)
   at Telerik.Windows.Documents.Fixed.Model.Editing.RadFixedDocumentEditor.Draw()
   at Telerik.Windows.Documents.Fixed.Model.Editing.RadFixedDocumentEditor.StartNewPage(SectionProperties sectionProperties)
   at Telerik.Windows.Documents.Fixed.Model.Editing.RadFixedDocumentEditor.StartNewPage()
   at Telerik.Windows.Documents.Fixed.Model.Editing.RadFixedDocumentEditor.AddBlock(IBlockElement blockElement, CancellationToken cancellationToken)
   at Telerik.Windows.Documents.Flow.FormatProviders.Pdf.Export.PdfExporter.ExportSection(Section section, RadFixedDocumentEditor editor)
   at Telerik.Windows.Documents.Flow.FormatProviders.Pdf.Export.PdfExporter.ExportDocument(RadFlowDocument document, RadFixedDocumentEditor editor)
   at Telerik.Windows.Documents.Flow.FormatProviders.Pdf.Export.PdfExporter.ExportInternal()
   at Telerik.Windows.Documents.Flow.FormatProviders.Pdf.Export.PdfExporter.Export()
   at Telerik.Windows.Documents.Flow.FormatProviders.Pdf.PdfFormatProvider.ExportToFixedDocument(RadFlowDocument document, CancellationToken cancellationToken)
   at Telerik.Windows.Documents.Flow.FormatProviders.Pdf.PdfFormatProvider.ExportOverride(RadFlowDocument document, Stream output, CancellationToken cancellationToken)
   at Telerik.Windows.Documents.Common.FormatProviders.FormatProviderBase`1.Export(T document, Stream output, Nullable`1 timeout)
   at _1713205HtmlToPdf.Program.Main(String[] args) in C:\Users\dyordano\OneDrive - Progress Software Corporation\MyProjects\1713205HtmlToPdf\Program.cs:line 46

This missing functionality may be workaround by implementing and registering custom IPdfFilter implementation that decodes JPEG2000 images. The custom decoder may be registered with FiltersManager class and its implementation may be similar to RadPdfViewers JpxDecoder SDK example implementation:

- https://github.com/telerik/xaml-sdk/blob/master/PdfViewer/CustomDecoder/JpxDecoder.cs
- Use a custom JPXDecode filter with RadPdfViewer

Support for validating signature fields signed with signatures that are encoded in ETSI.CAdES.detached encoding should be added.

InvalidCastException is thrown when importing a PDF with a CR-terminated comment in its /Info dictionary.

Calculation chain construction during import takes a lot of time for documents with formulas with large area references.

Calculation of array formulas with large area references takes a lot of time.