/// <summary>
/// Initializes a new instance of the <see cref="DocumentPaginatorEx" /> class.
/// </summary>
/// <param name="document">The document.</param>
/// <param name="printableArea">The printable area size.</param>
/// <param name="range">The print page range.</param>
public DocumentPaginatorEx(FlowDocument document, Size printableArea, PageRange range)
{
// Clone the source document's content into a new FlowDocument.
// This is because the pagination for the printer needs to be
// done differently than the pagination for the displayed page.
// We print the copy, rather that the original FlowDocument.
var stream = new MemoryStream();
var source = new TextRange(document.ContentStart, document.ContentEnd);
source.Save(stream, DataFormats.Xaml);
var documentCopy = new FlowDocument();
var dest = new TextRange(documentCopy.ContentStart, documentCopy.ContentEnd);
dest.Load(stream, DataFormats.Xaml);
// Ready to go on the copy of the document
var paginatorSource = documentCopy as IDocumentPaginatorSource;
_flowDocumentPaginator = paginatorSource.DocumentPaginator;
CurrentPage = 0;
TotalPrintableArea = printableArea;
var height = printableArea.Height;
var width = printableArea.Width;
var docEx = document as FlowDocumentEx;
if (docEx != null)
{
width -= (docEx.PrintMargin.Left + docEx.PrintMargin.Right);
height -= (docEx.PrintMargin.Top + docEx.PrintMargin.Bottom);
DocumentPrintMargin = docEx.PrintMargin;
OriginalPrintMargin = docEx.PrintMargin;
Watermark = docEx.PrintWatermark;
if (Watermark != null)
{
Watermark.Resources = document.Resources;
Watermark.DataContext = document.DataContext;
Watermark.Measure(printableArea);
Watermark.Arrange(new Rect(0, 0, Watermark.DesiredSize.Width, Watermark.DesiredSize.Height));
}
Header = docEx.PageHeader;
if (Header != null)
{
Header.Resources = document.Resources;
Header.DataContext = document.DataContext;
Header.Width = width;
Header.Measure(new Size(width, double.PositiveInfinity));
Header.Height = Header.DesiredSize.Height; // These two lines attempt to fix the size as desired and make sure it is properly measured at that
Header.Measure(new Size(width, Header.DesiredSize.Height));
Header.Arrange(new Rect(0, 0, Header.DesiredSize.Width, Header.DesiredSize.Height));
height -= Header.DesiredSize.Height;
DocumentPrintMargin = new Thickness(DocumentPrintMargin.Left, DocumentPrintMargin.Top + Header.DesiredSize.Height, DocumentPrintMargin.Right, DocumentPrintMargin.Bottom);
}
Footer = docEx.PageFooter;
if (Footer != null)
{
Footer.Resources = document.Resources;
Footer.DataContext = document.DataContext;
Footer.Width = width;
Footer.Measure(new Size(width, double.PositiveInfinity));
Footer.Height = Footer.DesiredSize.Height; // These two lines attempt to fix the size as desired and make sure it is properly measured at that
Footer.Measure(new Size(width, Footer.DesiredSize.Height));
Footer.Arrange(new Rect(0, 0, Footer.DesiredSize.Width, Footer.DesiredSize.Height));
height -= Footer.DesiredSize.Height;
DocumentPrintMargin = new Thickness(DocumentPrintMargin.Left, DocumentPrintMargin.Top, DocumentPrintMargin.Right, DocumentPrintMargin.Bottom + Footer.DesiredSize.Height);
}
}
else
{
DocumentPrintMargin = new Thickness();
}
_flowDocumentPaginator.PageSize = new Size(width, height);
_flowDocumentPaginator.ComputePageCount();
TotalPages = _flowDocumentPaginator.PageCount;
Range = range;
}