/// <summary>
/// Creates an image from the specified file.
/// For non-pdf files, this requires that an instance of an implementation of <see cref="T:MigraDocCore.DocumentObjectModel.MigraDoc.DocumentObjectModel.Shapes.ImageSource"/> be set on the `ImageSource.ImageSourceImpl` property.
/// For .NetCore apps, if this property is null at this point, then <see cref="T:PdfSharpCore.Utils.ImageSharpImageSource"/> with <see cref="T:SixLabors.ImageSharp.PixelFormats.Rgba32"/> Pixel Type is used
/// </summary>
/// <param name="path">The path to a BMP, PNG, GIF, JPEG, TIFF, or PDF file.</param>
/// <param name="accuracy">Moderate allows for broken references when using a PDF file.</param>
public static XImage FromFile(string path, PdfReadAccuracy accuracy)
{
if (PdfReader.TestPdfFile(path) > 0)
{
return(new XPdfForm(path, accuracy));
}
return(new XImage(path));
}
/// <summary>
/// Initializes a new instance of the <see cref="XPdfForm"/> class from a stream.
/// </summary>
/// <param name="stream">The stream.</param>
/// <param name="accuracy">Moderate allows for broken references.</param>
internal XPdfForm(Stream stream, PdfReadAccuracy accuracy)
{
// Create a dummy unique path
_path = "*" + Guid.NewGuid().ToString("B");
if (PdfReader.TestPdfFile(stream) == 0)
{
throw new ArgumentException("The specified stream has no valid PDF file header.", "stream");
}
_externalDocument = PdfReader.Open(stream, accuracy);
}
public PdfDocument GetDocument(string path, PdfReadAccuracy accuracy)
{
Debug.Assert(path.StartsWith("*") || Path.IsPathRooted(path), "Path must be full qualified.");
PdfDocument document = null;
PdfDocument.DocumentHandle handle;
if (_importedDocuments.TryGetValue(path, out handle))
{
document = handle.Target;
if (document == null)
{
RemoveDocument(path);
}
}
if (document == null)
{
document = PdfReader.Open(path, PdfDocumentOpenMode.Import, accuracy);
_importedDocuments.Add(path, document.Handle);
}
return(document);
}
/// <summary>
/// Initializes a new instance of the XPdfForm class from the specified path to an external PDF document.
/// Although PDFsharp internally caches XPdfForm objects it is recommended to reuse XPdfForm objects
/// in your code and change the PageNumber property if more than one page is needed form the external
/// document. Furthermore, because XPdfForm can occupy very much memory, it is recommended to
/// dispose XPdfForm objects if not needed anymore.
/// </summary>
internal XPdfForm(string path, PdfReadAccuracy accuracy)
{
int pageNumber;
path = ExtractPageNumber(path, out pageNumber);
path = Path.GetFullPath(path);
if (!File.Exists(path))
{
throw new FileNotFoundException(PSSR.FileNotFound(path));
}
if (PdfReader.TestPdfFile(path) == 0)
{
throw new ArgumentException("The specified file has no valid PDF file header.", "path");
}
_path = path;
_pathReadAccuracy = accuracy;
if (pageNumber != 0)
{
PageNumber = pageNumber;
}
}
/// <summary>
/// Opens an existing PDF document.
/// </summary>
public static PdfDocument Open(Stream stream, string password, PdfDocumentOpenMode openmode, PdfReadAccuracy accuracy)
{
return(Open(stream, password, openmode, null, accuracy));
}
/// <summary>
/// Opens an existing PDF document.
/// </summary>
public static PdfDocument Open(Stream stream, PdfDocumentOpenMode openmode, PdfPasswordProvider passwordProvider, PdfReadAccuracy accuracy)
{
return(Open(stream, null, openmode, passwordProvider, accuracy));
}
/// <summary>
/// Opens an existing PDF document.
/// </summary>
public static PdfDocument Open(Stream stream, PdfDocumentOpenMode openmode, PdfReadAccuracy accuracy)
{
return(Open(stream, null, openmode, accuracy));
}
/// <summary>
/// Opens an existing PDF document.
/// </summary>
public static PdfDocument Open(string path, string password, PdfReadAccuracy accuracy)
{
return(Open(path, password, PdfDocumentOpenMode.Modify, null, accuracy));
}
/// <summary>
/// Opens an existing PDF document.
/// </summary>
public static PdfDocument Open(string path, string password, PdfDocumentOpenMode openmode, PdfPasswordProvider provider, PdfReadAccuracy accuracy)
{
#if NETCOREAPP1_1 || (!NETFX_CORE && !PORTABLE)
PdfDocument document;
Stream stream = null;
try
{
stream = new FileStream(path, FileMode.Open, FileAccess.Read);
document = Open(stream, password, openmode, provider, accuracy);
if (document != null)
{
document._fullPath = Path.GetFullPath(path);
}
}
finally
{
if (stream != null)
#if NETCOREAPP1_1 || UWP
{ stream.Dispose(); }
#else
{ stream.Close(); }
#endif
}
return(document);
#else
return(null);
#endif
}
/// <summary>
/// Opens an existing PDF document.
/// </summary>
public static PdfDocument Open(string path, PdfDocumentOpenMode openmode, PdfPasswordProvider provider, PdfReadAccuracy accuracy)
{
return(Open(path, null, openmode, provider, accuracy));
}
/// <summary>
/// Creates an XPdfForm from a stream.
/// </summary>
public static XPdfForm FromStream(Stream stream, PdfReadAccuracy accuracy)
{
return(new XPdfForm(stream, accuracy));
}
/// <summary>
/// Opens an existing PDF document.
/// </summary>
public static PdfDocument Open(string path, string password, PdfDocumentOpenMode openmode, PdfPasswordProvider provider, PdfReadAccuracy accuracy)
{
PdfDocument document;
Stream stream = null;
try
{
stream = new FileStream(path, FileMode.Open, FileAccess.Read);
document = Open(stream, password, openmode, provider, accuracy);
if (document != null)
{
document._fullPath = Path.GetFullPath(path);
}
}
finally
{
if (stream != null)
{
stream.Dispose();
}
}
return(document);
}
/// <summary>
/// Creates an XPdfForm from a stream and a password.
/// </summary>
public static XPdfForm FromStream(Stream stream, string password, PdfReadAccuracy accuracy)
{
return(new XPdfForm(stream, password, accuracy));
}
/// <summary>
/// Opens an existing PDF document.
/// </summary>
public static PdfDocument Open(Stream stream, string password, PdfDocumentOpenMode openmode, PdfPasswordProvider passwordProvider, PdfReadAccuracy accuracy)
{
PdfDocument document;
try
{
Lexer lexer = new Lexer(stream);
document = new PdfDocument(lexer);
document._state |= DocumentState.Imported;
document._openMode = openmode;
document._fileSize = stream.Length;
// Get file version.
byte[] header = new byte[1024];
stream.Position = 0;
stream.Read(header, 0, 1024);
document._version = GetPdfFileVersion(header);
if (document._version == 0)
{
throw new InvalidOperationException(PSSR.InvalidPdf);
}
document._irefTable.IsUnderConstruction = true;
Parser parser = new Parser(document);
// Read all trailers or cross-reference streams, but no objects.
document._trailer = parser.ReadTrailer(accuracy);
if (document._trailer == null)
{
ParserDiagnostics.ThrowParserException("Invalid PDF file: no trailer found.");
}
Debug.Assert(document._irefTable.IsUnderConstruction);
document._irefTable.IsUnderConstruction = false;
// Is document encrypted?
PdfReference xrefEncrypt = document._trailer.Elements[PdfTrailer.Keys.Encrypt] as PdfReference;
if (xrefEncrypt != null)
{
//xrefEncrypt.Value = parser.ReadObject(null, xrefEncrypt.ObjectID, false);
PdfObject encrypt = parser.ReadObject(null, xrefEncrypt.ObjectID, false, false);
encrypt.Reference = xrefEncrypt;
xrefEncrypt.Value = encrypt;
PdfStandardSecurityHandler securityHandler = document.SecurityHandler;
TryAgain:
PasswordValidity validity = securityHandler.ValidatePassword(password);
if (validity == PasswordValidity.Invalid)
{
if (passwordProvider != null)
{
PdfPasswordProviderArgs args = new PdfPasswordProviderArgs();
passwordProvider(args);
if (args.Abort)
{
return(null);
}
password = args.Password;
goto TryAgain;
}
else
{
if (password == null)
{
throw new PdfReaderException(PSSR.PasswordRequired);
}
else
{
throw new PdfReaderException(PSSR.InvalidPassword);
}
}
}
else if (validity == PasswordValidity.UserPassword && openmode == PdfDocumentOpenMode.Modify)
{
if (passwordProvider != null)
{
PdfPasswordProviderArgs args = new PdfPasswordProviderArgs();
passwordProvider(args);
if (args.Abort)
{
return(null);
}
password = args.Password;
goto TryAgain;
}
else
{
throw new PdfReaderException(PSSR.OwnerPasswordRequired);
}
}
}
else
{
if (password != null)
{
// Password specified but document is not encrypted.
// ignore
}
}
PdfReference[] irefs2 = document._irefTable.AllReferences;
int count2 = irefs2.Length;
// 3rd: Create iRefs for all compressed objects.
Dictionary <int, object> objectStreams = new Dictionary <int, object>();
for (int idx = 0; idx < count2; idx++)
{
PdfReference iref = irefs2[idx];
PdfCrossReferenceStream xrefStream = iref.Value as PdfCrossReferenceStream;
if (xrefStream != null)
{
for (int idx2 = 0; idx2 < xrefStream.Entries.Count; idx2++)
{
PdfCrossReferenceStream.CrossReferenceStreamEntry item = xrefStream.Entries[idx2];
// Is type xref to compressed object?
if (item.Type == 2)
{
//PdfReference irefNew = parser.ReadCompressedObject(new PdfObjectID((int)item.Field2), (int)item.Field3);
//document._irefTable.Add(irefNew);
int objectNumber = (int)item.Field2;
if (!objectStreams.ContainsKey(objectNumber))
{
objectStreams.Add(objectNumber, null);
PdfObjectID objectID = new PdfObjectID((int)item.Field2);
parser.ReadIRefsFromCompressedObject(objectID);
}
}
}
}
}
// 4th: Read compressed objects.
for (int idx = 0; idx < count2; idx++)
{
PdfReference iref = irefs2[idx];
PdfCrossReferenceStream xrefStream = iref.Value as PdfCrossReferenceStream;
if (xrefStream != null)
{
for (int idx2 = 0; idx2 < xrefStream.Entries.Count; idx2++)
{
PdfCrossReferenceStream.CrossReferenceStreamEntry item = xrefStream.Entries[idx2];
// Is type xref to compressed object?
if (item.Type == 2)
{
PdfReference irefNew = parser.ReadCompressedObject(new PdfObjectID((int)item.Field2),
(int)item.Field3);
Debug.Assert(document._irefTable.Contains(iref.ObjectID));
//document._irefTable.Add(irefNew);
}
}
}
}
PdfReference[] irefs = document._irefTable.AllReferences;
int count = irefs.Length;
// Read all indirect objects.
for (int idx = 0; idx < count; idx++)
{
PdfReference iref = irefs[idx];
if (iref.Value == null)
{
#if DEBUG_
if (iref.ObjectNumber == 1074)
{
iref.GetType();
}
#endif
try
{
Debug.Assert(document._irefTable.Contains(iref.ObjectID));
PdfObject pdfObject = parser.ReadObject(null, iref.ObjectID, false, false);
Debug.Assert(pdfObject.Reference == iref);
pdfObject.Reference = iref;
Debug.Assert(pdfObject.Reference.Value != null, "Something went wrong.");
}
catch (PositionNotFoundException ex)
{
Debug.WriteLine(ex.Message);
if (accuracy == PdfReadAccuracy.Strict)
{
throw;
}
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
// 4STLA rethrow exception to notify caller.
throw;
}
}
else
{
Debug.Assert(document._irefTable.Contains(iref.ObjectID));
//iref.GetType();
}
// Set maximum object number.
document._irefTable._maxObjectNumber = Math.Max(document._irefTable._maxObjectNumber,
iref.ObjectNumber);
}
// Encrypt all objects.
if (xrefEncrypt != null)
{
document.SecurityHandler.EncryptDocument();
}
// Fix references of trailer values and then objects and irefs are consistent.
document._trailer.Finish();
#if DEBUG_
// Some tests...
PdfReference[] reachables = document.xrefTable.TransitiveClosure(document.trailer);
reachables.GetType();
reachables = document.xrefTable.AllXRefs;
document.xrefTable.CheckConsistence();
#endif
if (openmode == PdfDocumentOpenMode.Modify)
{
// Create new or change existing document IDs.
if (document.Internals.SecondDocumentID == "")
{
document._trailer.CreateNewDocumentIDs();
}
else
{
byte[] agTemp = Guid.NewGuid().ToByteArray();
document.Internals.SecondDocumentID = PdfEncoders.RawEncoding.GetString(agTemp, 0, agTemp.Length);
}
// Change modification date
document.Info.ModificationDate = DateTime.Now;
// Remove all unreachable objects
int removed = document._irefTable.Compact();
if (removed != 0)
{
Debug.WriteLine("Number of deleted unreachable objects: " + removed);
}
// Force flattening of page tree
PdfPages pages = document.Pages;
Debug.Assert(pages != null);
//bool b = document.irefTable.Contains(new PdfObjectID(1108));
//b.GetType();
document._irefTable.CheckConsistence();
document._irefTable.Renumber();
document._irefTable.CheckConsistence();
}
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
throw;
}
return(document);
}
/// <summary>
/// Opens an existing PDF document.
/// </summary>
public static PdfDocument Open(string path, PdfDocumentOpenMode openmode, PdfReadAccuracy accuracy)
{
return(Open(path, null, openmode, null, accuracy));
}
/// <summary>
/// Opens an existing PDF document.
/// </summary>
public static PdfDocument Open(Stream stream, PdfReadAccuracy accuracy)
{
return(Open(stream, PdfDocumentOpenMode.Modify, accuracy));
}
/// <summary>
/// Creates an XPdfForm from a file.
/// </summary>
public static new XPdfForm FromFile(string path, PdfReadAccuracy accuracy)
{
// TODO: Same file should return same object (that's why the function is static).
return(new XPdfForm(path, accuracy));
}
