/// <summary>
/// Writes the trailer flag and the trailer dictionary to the base stream
/// </summary>
/// <param name="documentid"></param>
protected virtual void WriteTrailerObject(PDFDocumentID documentid)
{
this.BaseStream.WriteLine("trailer");
this.BaseStream.Write(Constants.StartDictionary);
WriteTrailerDictionaryEntries(documentid);
this.BaseStream.WriteLine(Constants.EndDictionary);
}
//
// Static Parse - supports the PDFParsableValue attribute
//
#region public static PDFDocumentID Parse(string value)
/// <summary>
/// Parses a string value into a PDFDocumentID with the expected format as either a single Guid or a comma separated pair of Guids.
/// </summary>
/// <param name="value"></param>
/// <returns></returns>
public static PDFDocumentID Parse(string value)
{
if (string.IsNullOrEmpty(value))
{
throw new ArgumentNullException(CommonErrors.CannotParseTheDocumentIDs);
}
try
{
string[] both = value.Split(',');
Guid one = new Guid(both[0].Trim());
Guid two;
if (both.Length > 1)
{
two = new Guid(both[1].Trim());
}
else
{
two = Guid.NewGuid();
}
PDFDocumentID ids = PDFDocumentID.Create(one, two);
return(ids);
}
catch (Exception ex)
{
throw new ArgumentException(CommonErrors.CannotParseTheDocumentIDs, "value", ex);
}
}
/// <summary>
/// Closes the document, writing all the indirect objects, the xreftable, and the trailer to the underlying base stream
/// </summary>
/// <param name="documentid"></param>
public override void CloseDocument(PDFDocumentID documentid)
{
this.Log(TraceLevel.Message, "Closing the writer and outputting indirect object data onto the underlying stream");
this.WritePDFHeader();
this.WriteAllIndirectObjects(this.XRefTable);
this.WriteXRefTable(this.XRefTable);
this.BaseStream.WriteLine();
this.WriteTrailerObject(documentid);
this.WritePDFEndOfFile();
}
/// <summary>
/// Outputs all the trailer dictionary entries - size, catalog, info and id to the base stream
/// </summary>
/// <param name="documentid"></param>
protected virtual void WriteTrailerDictionaryEntries(PDFDocumentID documentid)
{
this.BaseStream.Write(Constants.StartName);
this.BaseStream.Write("Size");
this.BaseStream.Write(Constants.WhiteSpace);
this.BaseStream.WriteLine(this.XRefTable.ReferenceCount.ToString());
PDFObjectRef oref;
if (this.ObjectDictionary.TryGetValue("Catalog", out oref))
{
this.BaseStream.Write(Constants.StartName);
this.BaseStream.Write("Root");
this.BaseStream.Write(Constants.WhiteSpace);
this.BaseStream.Write(oref.Number + Constants.WhiteSpace + oref.Generation + " R");
this.BaseStream.WriteLine();
}
if (this.IsUpdateToExisting)
{
this.BaseStream.Write(Constants.StartName);
this.BaseStream.Write("Prev");
this.BaseStream.Write(Constants.WhiteSpace);
this.BaseStream.Write(this.XRefTable.Previous.Offset.ToString());
this.BaseStream.WriteLine();
}
if (this.ObjectDictionary.TryGetValue("Info", out oref))
{
this.BaseStream.Write(Constants.StartName);
this.BaseStream.Write("Info");
this.BaseStream.Write(Constants.WhiteSpace);
this.BaseStream.Write(oref.Number + Constants.WhiteSpace + oref.Generation + " R");
}
if (documentid != null)
{
this.BaseStream.WriteLine();
this.BaseStream.Write(Constants.StartName);
this.BaseStream.Write("ID");
this.BaseStream.Write(Constants.WhiteSpace);
this.BaseStream.Write(Constants.StartArray);
this.WriteStringHex(documentid.One);
this.BaseStream.Write(" ");
this.WriteStringHex(documentid.Two);
this.BaseStream.WriteLine(Constants.EndArray);
}
}
/// <summary>
/// Creates and returns a new PDFDocumentID with the known binary values
/// </summary>
/// <param name="one"></param>
/// <param name="two"></param>
/// <returns></returns>
public static PDFDocumentID Create(byte[] one, byte[] two)
{
if (null == one || one.Length == 0)
{
throw new ArgumentOutOfRangeException(CommonErrors.DocumentIDCannotBeEmpty);
}
if (null == two || two.Length == 0)
{
throw new ArgumentOutOfRangeException(CommonErrors.DocumentIDCannotBeEmpty);
}
PDFDocumentID ids = new PDFDocumentID();
ids.One = one;
ids.Two = two;
return(ids);
}
protected override PDFObjectRef DoOutputToPDF(PDFRenderContext context, PDFWriter writer)
{
if (null != this.OriginalFile)
{
writer.OpenDocument(this.OriginalFile, true);
PDFObjectRef catalog = this.WriteCatalog(context, writer);
this.WriteInfo(context, writer);
PDFDocumentID id = this.DocumentComponent.DocumentID;
if (null == id)
{
id = PDFDocumentID.Create();
}
writer.CloseDocument(id);
return(catalog);
}
else
{
return(base.DoOutputToPDF(context, writer));
}
}
protected virtual PDFWriterFactory GetSecureWriter(Document forDoc, IDocumentPasswordSettings settings)
{
if (null == forDoc)
{
throw new ArgumentNullException("forDoc");
}
SecureString owner = null;
SecureString user = null;
PDFDocumentID id = forDoc.DocumentID;
var permissions = forDoc.Permissions;
if (null != settings)
{
owner = settings.OwnerPassword;
user = settings.UserPassword;
}
if (null == id)
{
id = PDFDocumentID.Create();
forDoc.DocumentID = id;
}
if (null == permissions)
{
permissions = new DocumentPermissions();
}
var encFactory = permissions.GetFactory();
var enc = encFactory.InitEncrypter(owner, user, id, permissions.GetRestrictions(), forDoc.PerformanceMonitor);
return(new PDFSecureWrite14Factory(enc));
}
