System.ArgumentException when setting a password to a document with form fields

Exception when merging file that contains notdef characters with PdfStreamWriter

When using the Telerik.Documents.ImageUtils.JpegImageConverter default implementation in Blazor WebAssembly application the Magick.NET library doesn't load all of its assemblies.

Workaround:
Create a custom implementation of the JpegImageConverterBase class: Create Custom JpegImageConverter in .Net Standard.

According to the Pdf Reference, a rectangle is written as an array of four numbers giving its coordinates. However, specific documents contain the numbers for the rectangles for the Type0Font's bounding box as indirect references. Trying to import such a setup results in an ArgumentException "The IndirectReference type cannot be converted to a real numeric value.".

According to the CMap specification (page 49): Overlapping codespaces are not permitted.

When a TextBox field has a smaller size than the default padding of the field an exception is thrown: ArgumentOutOfRangeException: width should be greater or equal than 0. (Parameter 'width')

Currently, importing a document with non-embedded TrueType font will result in a font instance with an empty font source. Support should be added for providing custom font data of TrueType fonts during document import.

By specification, the last line of the file contains only the end-of-file marker, %%EOF. If the file contains many trailing bytes at its end, a NotSupportedException: 'StartXRef keyword cannot be found.', is thrown.

Workaround: Trim any content after the end-of-file marker (see FixInvalidEndOfFile). 

I have read that there limitations to PDF files being imported, however, the file being imported  was generated with FixedContentEditor, so, should be able to import?

  using (Stream stream = Stream)
        {
          try
          {
            this._document = provider.Import(stream);
            _InputPath = fileName;
          }
          catch (Exception e)
          {
            Errors = "Could not open file " + fileName + ": " + e.Message;
            this._document = null;
          }
        }
      }

Currently, there is such an option using the FixedContentEditor`s DrawWidget() method.

When drawing text block content of a TextBoxFields the text is visualized with the wrong text due to a missing font`s fallback mechanism.

When exporting a document referencing PdfProcessing`s .NET Standard assemblies with PdfComplianceLevel set an exception is thrown.

The common annotation properties are described in table "Entries common to all annotation dictionaries" of the Pdf specification.

Declined: Handling a partial annotation import-export could lead to exporting invalid PDF documents.

Provide an API for externally signing the document hash.

There are many instances of the internal Transition, State and ImageXObject classes.

Some operators cannot be correctly parsed which causes incomplete import/export

Writing a page to a stream with resources, defined with names including space or dash characters, are not exported using an escape sequence.

According to the PDF Specification: A redaction annotation (PDF 1.7) identifies content that is intended to be removed from the document.

There are two possible options to workaround this functionality:

1. To iterate the document content and replace the matches which meet certain conditions with an empty string:

   foreach (RadFixedPage page in document.Pages)
   {
   	foreach (ContentElementBase elementBase in page.Content)
   	{
   		if (elementBase is TextFragment textFragment)
   		{
   			if (IsValidEmail(textFragment.Text))
   			{
   				textFragment.Text = string.Empty;
   			}
   		}
   	}
   }

   Note: the desired content could be split into several text fragments and if so a custom parser should be created.
   
2. To iterate the document content and check if the TextFragment position is within a specific RectangleGeometry: 
   

   foreach (RadFixedPage page in document.Pages)
   {
   	foreach (ContentElementBase elementBase in page.Content)
   	{
   		if (elementBase is TextFragment textFragment)
   		{
   			if (IsIntersecting(rectangleGeometry, textFragment))
   			{
   				textFragment.Text = string.Empty;
   			}
   		}
   	}
   }

   Note: it should be taken into account that the text fragment could flow out of the rectangle.

Exception when importing a file with LabColor gradients 

Exporting a field with missing Appearances property causes exception