/// <summary>
/// PDF embedded file class constructor
/// </summary>
/// <param name="Document">Current document</param>
/// <param name="FileName">File name</param>
/// <param name="PdfFileName">PDF file name (see remarks)</param>
/// <remarks>
/// <para>
/// FileName is the name of the source file on the disk.
/// PDFFileName is the name of the as saved within the PDF document file.
/// If PDFFileName is not given or it is set to null, the class takes
/// the disk's file name without the path.
/// </para>
/// </remarks>
public PdfEmbeddedFile
(
PdfDocument Document,
String FileName,
String PdfFileName = null
) : base(Document, ObjectType.Dictionary, "/Filespec")
{
// save file name
this.FileName = FileName;
// test exitance
if (!File.Exists(FileName))
{
throw new ApplicationException("Embedded file " + FileName + " does not exist");
}
// get file length
FileInfo FI = new FileInfo(FileName);
if (FI.Length > Int32.MaxValue - 4095)
{
throw new ApplicationException("Embedded file " + FileName + " too long");
}
Int32 FileLength = (Int32)FI.Length;
// translate file extension to mime type string
MimeType = ExtToMime.TranslateExtToMime(FI.Extension);
// create embedded file object
PdfObject EmbeddedFile = new PdfObject(Document, ObjectType.Stream, "/EmbeddedFile");
// save uncompressed file length
EmbeddedFile.Dictionary.AddFormat("/Params", "<</Size {0}>>", FileLength);
// file data content byte array
Byte[] FileData = new Byte[FileLength];
// load all the file's data
FileStream DataStream = null;
try
{
// open the file
DataStream = new FileStream(FileName, FileMode.Open, FileAccess.Read);
// read all the file
if (DataStream.Read(FileData, 0, FileLength) != FileLength)
{
throw new Exception();
}
}
// loading file failed
catch (Exception)
{
throw new ApplicationException("Invalid media file: " + FileName);
}
// close the file
DataStream.Close();
// compress the data
Byte[] FileDataComp = CompressStream(FileData);
if (FileDataComp != null)
{
FileData = FileDataComp;
EmbeddedFile.Dictionary.Add("/Filter", "/FlateDecode");
}
// encryption
if (Document.Encryption != null)
{
FileData = Document.Encryption.EncryptByteArray(EmbeddedFile.ObjectNumber, FileData);
}
// add compressed file length
EmbeddedFile.Dictionary.AddInteger("/Length", FileData.Length);
// shortcut
PdfBinaryWriter PdfFile = Document.PdfFile;
// save file position for this object
EmbeddedFile.FilePosition = PdfFile.BaseStream.Position;
// write object header
PdfFile.WriteFormat("{0} 0 obj\n", EmbeddedFile.ObjectNumber);
// write dictionary
EmbeddedFile.Dictionary.WriteToPdfFile();
// output stream
PdfFile.WriteString("stream\n");
// debug
if (Document.Debug)
{
PdfFile.WriteString("*** MEDIAFILE PLACE HOLDER ***");
}
// output embedded font
else
{
PdfFile.Write(FileData);
}
// output stream
PdfFile.WriteString("\nendstream\n");
// output object trailer
PdfFile.WriteString("endobj\n");
// file spec object type
Dictionary.Add("/Type", "/Filespec");
// PDF file name
if (String.IsNullOrWhiteSpace(PdfFileName))
{
PdfFileName = FI.Name;
}
Dictionary.AddPdfString("/F", PdfFileName);
Dictionary.AddPdfString("/UF", PdfFileName);
// add reference
Dictionary.AddFormat("/EF", "<</F {0} 0 R /UF {0} 0 R>>", EmbeddedFile.ObjectNumber);
return;
}
private PdfEmbeddedFile
(
PdfDocument Document,
string FileName,
string PdfFileName
) : base(Document, ObjectType.Dictionary, "/Filespec")
{
// save file name
this.FileName = FileName;
// test exitance
if (!File.Exists(FileName))
{
throw new ApplicationException("Embedded file " + FileName + " does not exist");
}
// get file length
var FI = new FileInfo(FileName);
if (FI.Length > int.MaxValue - 4095)
{
throw new ApplicationException("Embedded file " + FileName + " too long");
}
var FileLength = (int)FI.Length;
// translate file extension to mime type string
MimeType = ExtToMime.TranslateExtToMime(FI.Extension);
// create embedded file object
var EmbeddedFile = new PdfObject(Document, ObjectType.Stream, "/EmbeddedFile");
// save uncompressed file length
EmbeddedFile.Dictionary.AddFormat("/Params", "<</Size {0}>>", FileLength);
// file data content byte array
EmbeddedFile.ObjectValueArray = new byte[FileLength];
// load all the file's data
FileStream DataStream = null;
try
{
// open the file
DataStream = new FileStream(FileName, FileMode.Open, FileAccess.Read);
// read all the file
if (DataStream.Read(EmbeddedFile.ObjectValueArray, 0, FileLength) != FileLength)
{
throw new Exception();
}
}
// loading file failed
catch (Exception)
{
throw new ApplicationException("Invalid media file: " + FileName);
}
// close the file
DataStream.Close();
// debug
if (Document.Debug)
{
EmbeddedFile.ObjectValueArray = Document.TextToByteArray("*** MEDIA FILE PLACE HOLDER ***");
}
// write stream
EmbeddedFile.WriteObjectToPdfFile();
// file spec object type
Dictionary.Add("/Type", "/Filespec");
// PDF file name
if (string.IsNullOrWhiteSpace(PdfFileName))
{
PdfFileName = FI.Name;
}
Dictionary.AddPdfString("/F", PdfFileName);
Dictionary.AddPdfString("/UF", PdfFileName);
// add reference
Dictionary.AddFormat("/EF", "<</F {0} 0 R /UF {0} 0 R>>", EmbeddedFile.ObjectNumber);
}
