/**
* <summary>Serializes the contents into the content stream.</summary>
*/
public void Flush(
)
{
PdfStream stream;
PdfDataObject baseDataObject = BaseDataObject;
// Are contents just a single stream object?
if (baseDataObject is PdfStream) // Single stream.
{
stream = (PdfStream)baseDataObject;
}
else // Array of streams.
{
PdfArray streams = (PdfArray)baseDataObject;
// No stream available?
if (streams.Count == 0) // No stream.
{
// Add first stream!
stream = new PdfStream();
streams.Add( // Inserts the new stream into the content stream.
File.Register(stream) // Inserts the new stream into the file.
);
}
else // Streams exist.
{
// Eliminating exceeding streams...
/*
* NOTE: Applications that consume or produce PDF files are not required to preserve
* the existing structure of the Contents array [PDF:1.6:3.6.2].
*/
while (streams.Count > 1)
{
File.Unregister((PdfReference)streams[1]); // Removes the exceeding stream from the file.
streams.RemoveAt(1); // Removes the exceeding stream from the content stream.
}
stream = (PdfStream)streams.Resolve(0);
}
}
// Get the stream buffer!
bytes::IBuffer buffer = stream.Body;
// Delete old contents from the stream buffer!
buffer.Clear();
// Serializing the new contents into the stream buffer...
Document context = Document;
foreach (ContentObject item in items)
{
item.WriteTo(buffer, context);
}
}
/**
* <summary>Sets the Javascript script into the specified base data object.</summary>
*/
internal static void SetScript(PdfDictionary baseDataObject, PdfName key, string value)
{
PdfDataObject scriptObject = baseDataObject.Resolve(key);
if (!(scriptObject is PdfStream) && value.Length > 256)
{
baseDataObject[key] = baseDataObject.File.Register(scriptObject = new PdfStream());
}
// Insert the script!
if (scriptObject is PdfStream)
{
bytes::IBuffer scriptBuffer = ((PdfStream)scriptObject).Body;
scriptBuffer.Clear();
scriptBuffer.Append(value);
}
else
{
baseDataObject[key] = new PdfTextString(value);
}
}
