public IEnumerable <ScannedImage> Import(string filePath, ImportParams importParams, Func <int, int, bool> progressCallback)
{
if (!progressCallback(0, 0))
{
return(Enumerable.Empty <ScannedImage>());
}
int passwordAttempts = 0;
bool aborted = false;
int i = 0;
try
{
PdfDocument document = PdfReader.Open(filePath, PdfDocumentOpenMode.Import, args =>
{
if (!pdfPasswordProvider.ProvidePassword(Path.GetFileName(filePath), passwordAttempts++, out args.Password))
{
args.Abort = true;
aborted = true;
}
});
if (passwordAttempts > 0 &&
!document.SecuritySettings.HasOwnerPermissions &&
!document.SecuritySettings.PermitExtractContent)
{
errorOutput.DisplayError(string.Format(MiscResources.PdfNoPermissionToExtractContent, Path.GetFileName(filePath)));
return(Enumerable.Empty <ScannedImage>());
}
if (document.Info.Creator != MiscResources.NAPS2 && document.Info.Author != MiscResources.NAPS2)
{
pdfRenderer.ThrowIfCantRender();
return(importParams.Slice.Indices(document.PageCount)
.Select(index => document.Pages[index])
.TakeWhile(page => progressCallback(i++, document.PageCount))
.Select(page => ExportRawPdfPage(page, importParams)));
}
return(importParams.Slice.Indices(document.PageCount)
.Select(index => document.Pages[index])
.TakeWhile(page => progressCallback(i++, document.PageCount))
.SelectMany(page => GetImagesFromPage(page, importParams)));
}
catch (ImageRenderException e)
{
errorOutput.DisplayError(string.Format(MiscResources.ImportErrorNAPS2Pdf, Path.GetFileName(filePath)));
Log.ErrorException("Error importing PDF file.", e);
return(Enumerable.Empty <ScannedImage>());
}
catch (Exception e)
{
if (!aborted)
{
errorOutput.DisplayError(string.Format(MiscResources.ImportErrorCouldNot, Path.GetFileName(filePath)));
Log.ErrorException("Error importing PDF file.", e);
}
return(Enumerable.Empty <ScannedImage>());
}
}
public IEnumerable <IScannedImage> Import(string filePath)
{
int passwordAttempts = 0;
bool aborted = false;
try
{
PdfDocument document = PdfReader.Open(filePath, PdfDocumentOpenMode.ReadOnly, args =>
{
if (!pdfPasswordProvider.ProvidePassword(Path.GetFileName(filePath), passwordAttempts++, out args.Password))
{
args.Abort = true;
aborted = true;
}
});
if (document.Info.Creator != MiscResources.NAPS2 && document.Info.Author != MiscResources.NAPS2)
{
errorOutput.DisplayError(string.Format(MiscResources.ImportErrorNAPS2Pdf, Path.GetFileName(filePath)));
return(Enumerable.Empty <IScannedImage>());
}
if (passwordAttempts > 0 &&
!document.SecuritySettings.HasOwnerPermissions &&
!document.SecuritySettings.PermitExtractContent)
{
errorOutput.DisplayError(string.Format(MiscResources.PdfNoPermissionToExtractContent, Path.GetFileName(filePath)));
return(Enumerable.Empty <IScannedImage>());
}
return(document.Pages.Cast <PdfPage>().SelectMany(GetImagesFromPage));
}
catch (NotImplementedException e)
{
errorOutput.DisplayError(string.Format(MiscResources.ImportErrorNAPS2Pdf, Path.GetFileName(filePath)));
Log.ErrorException("Error importing PDF file.", e);
return(Enumerable.Empty <IScannedImage>());
}
catch (Exception e)
{
if (!aborted)
{
errorOutput.DisplayError(string.Format(MiscResources.ImportErrorCouldNot, Path.GetFileName(filePath)));
Log.ErrorException("Error importing PDF file.", e);
}
return(Enumerable.Empty <IScannedImage>());
}
}
public ScannedImageSource Import(string filePath, ImportParams importParams, ProgressHandler progressCallback, CancellationToken cancelToken)
{
var source = new ScannedImageSource.Concrete();
Task.Factory.StartNew(async() =>
{
if (cancelToken.IsCancellationRequested)
{
source.Done();
}
int passwordAttempts = 0;
bool aborted = false;
int i = 0;
try
{
PdfDocument document = PdfReader.Open(filePath, PdfDocumentOpenMode.Import, args =>
{
if (!pdfPasswordProvider.ProvidePassword(Path.GetFileName(filePath), passwordAttempts++, out args.Password))
{
args.Abort = true;
aborted = true;
}
});
if (passwordAttempts > 0 &&
!document.SecuritySettings.HasOwnerPermissions &&
!document.SecuritySettings.PermitExtractContent)
{
errorOutput.DisplayError(string.Format(MiscResources.PdfNoPermissionToExtractContent, Path.GetFileName(filePath)));
source.Done();
}
var pages = importParams.Slice.Indices(document.PageCount)
.Select(index => document.Pages[index])
.TakeWhile(page =>
{
progressCallback(i++, document.PageCount);
return(!cancelToken.IsCancellationRequested);
});
if (document.Info.Creator != MiscResources.NAPS2 && document.Info.Author != MiscResources.NAPS2)
{
pdfRenderer.ThrowIfCantRender();
foreach (var page in pages)
{
source.Put(await ExportRawPdfPage(page, importParams));
}
}
else
{
foreach (var page in pages)
{
await GetImagesFromPage(page, importParams, source);
}
}
}
catch (ImageRenderException e)
{
errorOutput.DisplayError(string.Format(MiscResources.ImportErrorNAPS2Pdf, Path.GetFileName(filePath)));
Log.ErrorException("Error importing PDF file.", e);
}
catch (Exception e)
{
if (!aborted)
{
errorOutput.DisplayError(string.Format(MiscResources.ImportErrorCouldNot, Path.GetFileName(filePath)));
Log.ErrorException("Error importing PDF file.", e);
}
}
finally
{
source.Done();
}
}, TaskCreationOptions.LongRunning);
return(source);
}