XlsFormatProvider: Add support for hidden rows.

Add support for superscript and subscript font effects for cell formatting. Currently, this is not supported by the model and is omitted on import.

When importing a document with an EmbeddedFile without a Subtype value.

Introduce an API for Cloning RadFixedPages.

Implement the Exponential Interpolation Function in PdfProcessing. Currently, NotSupportedFunctionTypeException is thrown with a message "Function type 2 is not supported."

PdfFormatProvider: Justified text alignment is not respected for specific text content.

At this point, XlsFormatProvider doesn't support images and they are not imported into Workbook while reading an .xls file.

RadSpreadProcessing expects an integer, instead of boolean. However, according to the specification, it should be boolean:

Add support for strikethrough font effect for cell formatting. Currently this is not supported by the model and is omitted on import.

After merging several PDF documents, some pages are blank indicating the following error:

With the current implementation when exporting a Stitching function all the containing functions are exported as Sampled functions even if they originally have been imported as Exponential interpolation functions, which leads to an increase in the size of the document.

More information can be found in the PDF Specification.

The XlsxPartNames class expects a strict name for reading the comments parts:

public const string CommentsPartName = @"/xl/comments{0}.xml";

However, some third-party tools may change the name to GemComments.xml for example. 

MS Excel recognizes this naming for the comments part. It would be nice to provide such functionality in RadSpreadProcessing.

XlsFormatProvider: InvalidOperationException is thrown when importing a document with an unsupported BIFF record.

Workaround: Re-save the file with Excel before importing it.

At this point XLS import of SpreadProcessing does not have support for notes/comments.

System.InvalidCastException: 'Unable to cast object of type 'Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Types.PdfStream' to type 'Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.MarkedContents.ReferencedObject'.'

Add support for PDF Portfolios.

When importing a document with many Path elements, the memory consumption could be very high.

The issue is that the document contains incorrect data that the CrossReferenceStream.LoadReferences method cannot parse.

With the current implementation, the compression setting is omitted:

• streamWriter.Settings.StreamCompression

As a result of the below missing operator, some of the glyphs can't be extracted from the CFFFontTable and the characters are not displayed in the PdfViewer:

The end user result is missing letter from the PDF content.