/// <summary>
/// Loads the ink annotations in the PDF file.
/// </summary>
/// <param name="pageNumber">1-based page number.</param>
/// <returns></returns>
public List <InkStroke> LoadInFileInkAnnotations(int pageNumber)
{
List <PdfLoadedInkAnnotation> inkAnnotations = sfPdf.GetInkAnnotations(pageNumber);
List <InkStroke> strokes = new List <InkStroke>();
// Get page information from SF model
PdfLoadedPage sfPage = sfPdf.GetPage(pageNumber);
// Get page information from MS model
Windows.Data.Pdf.PdfPage msPage = msPdf.GetPage(pageNumber);
// Calculate page mapping
PageMapping mapping = new PageMapping(msPage, sfPage);
foreach (PdfLoadedInkAnnotation annotation in inkAnnotations)
{
strokes.Add(mapping.InkAnnotation2InkStroke(annotation));
}
return(strokes);
}
/// <summary>
/// Save the ink annotations into the pdf file.
/// </summary>
/// <param name="inkDictionary"></param>
/// <returns></returns>
/// <remarks>
/// The page size returned from Syncfusion pdf is the media box size.
/// The page size displayed to the end user is the crop box size.
/// The size of the ink canvas is the same as the crop box size.
/// Syncfusion uses the bottom left corner as the origin, while ink canvas uses the top left corner.
/// </remarks>
public async Task <bool> SaveInkingToPdf(InkingManager inkManager)
{
// Indicate whether any ink annotation is added to the PDF file
bool fileChanged = false;
// Remove ereased ink annotations
foreach (KeyValuePair <int, List <InkStroke> > entry in await inkManager.ErasedStrokesDictionary())
{
// The key of the dictionary is page number, which is 1-based.
int pageNumber = entry.Key;
PdfLoadedPage sfPage = sfPdf.GetPage(pageNumber);
// Get page information from MS model
Windows.Data.Pdf.PdfPage msPage = msPdf.GetPage(pageNumber);
PageMapping mapping = new PageMapping(msPage, sfPage);
List <PdfInkAnnotation> erasedAnnotations = new List <PdfInkAnnotation>();
// Add each ink stroke to the page
foreach (InkStroke stroke in entry.Value)
{
PdfInkAnnotation inkAnnotation = mapping.InkStroke2InkAnnotation(stroke);
erasedAnnotations.Add(inkAnnotation);
}
if (sfPdf.RemoveInkAnnotations(sfPage, erasedAnnotations))
{
fileChanged = true;
}
}
// Add new ink annotations
foreach (KeyValuePair <int, InkStrokeContainer> entry in await inkManager.InAppInkDictionary())
{
PdfLoadedPage sfPage = sfPdf.GetPage(entry.Key);
// Get page information from MS model
Windows.Data.Pdf.PdfPage msPage = msPdf.GetPage(entry.Key);
PageMapping mapping = new PageMapping(msPage, sfPage);
// Add each ink stroke to the page
foreach (InkStroke stroke in entry.Value.GetStrokes())
{
PdfInkAnnotation inkAnnotation = mapping.InkStroke2InkAnnotation(stroke);
sfPage.Annotations.Add(inkAnnotation);
fileChanged = true;
}
}
// Save the file only if there are changes.
bool inkSaved = false;
if (fileChanged)
{
try
{
inkSaved = await sfPdf.SaveAsync();
// Copy and replace the actual file
await sfFile.CopyAndReplaceAsync(pdfFile);
}
catch (Exception ex)
{
// Try to save the file by extracting the pages.
StorageFile newFile = await backupFolder.CreateFileAsync("COPY_" + pdfFile.Name, CreationCollisionOption.GenerateUniqueName);
try
{
await sfPdf.CopyPages(newFile);
inkSaved = true;
// Copy and replace the actual file
await newFile.CopyAndReplaceAsync(pdfFile);
}
catch
{
App.NotifyUser(typeof(ViewerPage), "Error: \n" + ex.Message, true);
}
}
}
return(!(inkSaved ^ fileChanged));
}