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Merge pull request #241 from pamapa/attachment-annotations
support file attachment annotations
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‎PdfSharpCore/Pdf.Advanced/PdfEmbeddedFile.cs‎

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namespace PdfSharpCore.Pdf.Advanced
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{
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/// <summary>
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/// Represent a file stream embedded in the PDF document
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/// </summary>
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public class PdfEmbeddedFile : PdfDictionary
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{
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private readonly PdfDictionary paramsDictionary;
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public PdfEmbeddedFile(PdfDocument document)
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: base(document)
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{
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this.paramsDictionary = new PdfDictionary();
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Elements.SetName(Keys.Type, "/EmbeddedFile");
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Elements.SetObject(Keys.Params, paramsDictionary);
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}
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public PdfEmbeddedFile(PdfDocument document, byte[] bytes, string checksum = null)
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: this(document)
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{
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this.CreateStreamAndSetProperties(bytes, checksum);
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}
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public void CreateStreamAndSetProperties(byte[] bytes, string checksum = null)
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{
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this.CreateStream(bytes);
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this.paramsDictionary.Elements.SetInteger(Keys.Size, bytes.Length);
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if (string.IsNullOrEmpty(checksum))
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this.paramsDictionary.Elements.Remove(Keys.CheckSum);
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else
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this.paramsDictionary.Elements.SetString(Keys.CheckSum, checksum);
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}
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public string MimeType
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{
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get { return Elements.GetName(Keys.Subtype); }
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set { Elements.SetName(Keys.Subtype, value); }
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}
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// TODO : Add properties for the subdictionnary Params and the subsubdictionnary Mac
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/// <summary>
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/// Predefined keys of this embedded file.
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/// </summary>
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public class Keys : PdfDictionary.PdfStream.Keys
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{
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/// <summary>
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/// (Optional) The type of PDF object that this dictionary describes; if present,
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/// must be EmbeddedFile for an embedded file stream.
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/// </summary>
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[KeyInfo(KeyType.Name | KeyType.Optional, FixedValue = "EmbeddedFile")]
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public const string Type = "/Type";
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/// <summary>
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/// (Optional) The subtype of the embedded file. The value of this entry must be a
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/// first-class name, as defined in Appendix E. Names without a registered prefix
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/// must conform to the MIME media type names defined in Internet RFC 2046,
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/// Multipurpose Internet Mail Extensions (MIME), Part Two: Media Types(see the
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/// Bibliography), with the provision that characters not allowed in names must
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/// use the 2-character hexadecimal code format described in Section 3.2.4,
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/// “Name Objects.”
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/// </summary>
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[KeyInfo(KeyType.Name | KeyType.Optional)]
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public const string Subtype = "/Subtype";
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/// <summary>
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/// (Optional) An embedded file parameter dictionary containing additional,
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/// file-specific information (see Table 3.43).
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/// </summary>
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[KeyInfo(KeyType.Dictionary | KeyType.Optional)]
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public const string Params = "/Params";
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/// <summary>
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/// (Optional) The size of the embedded file, in bytes.
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/// </summary>
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[KeyInfo(KeyType.Integer | KeyType.Optional)]
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public const string Size = "/Size";
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/// <summary>
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/// (Optional) The date and time when the embedded file was created.
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/// </summary>
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[KeyInfo(KeyType.Date | KeyType.Optional)]
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public const string CreationDate = "/CreationDate";
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/// <summary>
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/// (Optional) The date and time when the embedded file was last modified.
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/// </summary>
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[KeyInfo(KeyType.Date | KeyType.Optional)]
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public const string ModDate = "/ModDate";
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/// <summary>
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/// (Optional) A subdictionary containing additional information specific to Mac OS files (see Table 3.44).
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/// </summary>
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[KeyInfo(KeyType.Dictionary | KeyType.Optional)]
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public const string Mac = "/Mac";
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/// <summary>
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/// (Optional) A 16-byte string that is the checksum of the bytes of the uncompressed
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/// embedded file. The checksum is calculated by applying the standard MD5 message-digest
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/// algorithm (described in Internet RFC 1321, The MD5 Message-Digest Algorithm; see the
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/// Bibliography) to the bytes of the embedded file stream.
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/// </summary>
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[KeyInfo(KeyType.Dictionary | KeyType.Optional)]
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public const string CheckSum = "/CheckSum";
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/// <summary>
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/// Gets the KeysMeta for these keys.
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/// </summary>
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internal static DictionaryMeta Meta
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{
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get
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{
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if (Keys.meta == null)
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Keys.meta = CreateMeta(typeof(Keys));
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return Keys.meta;
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}
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}
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static DictionaryMeta meta;
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}
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/// <summary>
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/// Gets the KeysMeta of this dictionary type.
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/// </summary>
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internal override DictionaryMeta Meta
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{
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get { return Keys.Meta; }
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}
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}
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}

‎PdfSharpCore/Pdf.Advanced/PdfFileSpecification.cs‎

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namespace PdfSharpCore.Pdf.Advanced
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{
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/// <summary>
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/// Represent a file stream embedded in the PDF document
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/// </summary>
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public class PdfFileSpecification : PdfDictionary
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{
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private readonly PdfDictionary embeddedFileDictionary;
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public PdfFileSpecification(PdfDocument document)
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: base(document)
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{
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this.embeddedFileDictionary = new PdfDictionary();
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Elements.SetName(Keys.Type, "/Filespec");
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Elements.SetObject(Keys.EF, embeddedFileDictionary);
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}
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public PdfFileSpecification(PdfDocument document, string fileName, PdfEmbeddedFile embeddedFile)
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: this(document)
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{
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this.FileName = fileName;
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this.EmbeddedFile = embeddedFile;
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}
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public string FileName
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{
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get { return Elements.GetString(Keys.F); }
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set { Elements.SetString(Keys.F, value); }
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}
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public PdfEmbeddedFile EmbeddedFile
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{
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get
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{
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var reference = embeddedFileDictionary.Elements.GetReference(Keys.F);
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return reference?.Value as PdfEmbeddedFile;
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}
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set
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{
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if (value == null)
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{
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embeddedFileDictionary.Elements.Remove(Keys.F);
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}
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else
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{
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if (!value.IsIndirect)
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Owner._irefTable.Add(value);
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embeddedFileDictionary.Elements.SetReference(Keys.F, value);
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}
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}
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}
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/// <summary>
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/// Predefined keys of this embedded file.
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/// </summary>
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public class Keys : KeysBase
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{
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/// <summary>
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/// (Required if an EF or RF entry is present; recommended always)
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/// The type of PDF object that this dictionary describes; must be Filespec
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/// for a file specification dictionary (see implementation note 45 in Appendix H).
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/// </summary>
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[KeyInfo(KeyType.Name | KeyType.Optional, FixedValue = "Filespec")]
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public const string Type = "/Type";
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/// <summary>
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/// (Required if the DOS, Mac, and Unix entries are all absent; amended with the UF
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/// entry for PDF 1.7) A file specification string of the form described in Section
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/// 3.10.1, “File Specification Strings,” or (if the file system is URL) a uniform
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/// resource locator, as described in Section 3.10.4, “URL Specifications.”
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///
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/// Note: It is recommended that the UF entry be used in addition to the F entry.
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/// The UF entry provides cross-platform and cross-language compatibility and the F
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/// entry provides backwards compatibility
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/// </summary>
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[KeyInfo(KeyType.Dictionary | KeyType.Optional)]
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public const string F = "/F";
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/// <summary>
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/// (Required if RF is present; PDF 1.3; amended to include the UF key in PDF 1.7)
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/// A dictionary containing a subset of the keys F, UF, DOS, Mac, and Unix,
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/// corresponding to the entries by those names in the file specification dictionary.
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/// The value of each such key is an embedded file stream (see Section 3.10.3,
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/// “Embedded File Streams”) containing the corresponding file. If this entry is
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/// present, the Type entry is required and the file specification dictionary must
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/// be indirectly referenced. (See implementation note 46in Appendix H.)
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///
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/// Note: It is recommended that the F and UF entries be used in place of the DOS,
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/// Mac, or Unix entries.
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/// </summary>
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[KeyInfo(KeyType.Dictionary | KeyType.Optional)]
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public const string EF = "/EF";
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/// <summary>
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/// Gets the KeysMeta for these keys.
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/// </summary>
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internal static DictionaryMeta Meta
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{
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get
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{
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if (Keys.meta == null)
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Keys.meta = CreateMeta(typeof(Keys));
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return Keys.meta;
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}
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}
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static DictionaryMeta meta;
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}
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/// <summary>
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/// Gets the KeysMeta of this dictionary type.
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/// </summary>
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internal override DictionaryMeta Meta
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{
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get { return Keys.Meta; }
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}
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}
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}

‎PdfSharpCore/Pdf.Annotations/PdfFileAttachmentAnnotation.cs‎

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using PdfSharpCore.Pdf.Advanced;
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using System;
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namespace PdfSharpCore.Pdf.Annotations
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{
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/// <summary>
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/// Represent a file that is attached to the PDF
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/// </summary>
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public class PdfFileAttachmentAnnotation : PdfAnnotation
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{
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/// <summary>
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/// Name of icons used in displaying the annotation.
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/// </summary>
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public enum IconType
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{
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Graph,
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PushPin,
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Paperclip,
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Tag
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="PdfFileAttachmentAnnotation"/> class.
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/// </summary>
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public PdfFileAttachmentAnnotation()
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{
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Elements.SetName(Keys.Subtype, "/FileAttachment");
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="PdfFileAttachmentAnnotation"/> class.
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/// </summary>
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public PdfFileAttachmentAnnotation(PdfDocument document)
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: base(document)
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{
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Elements.SetName(Keys.Subtype, "/FileAttachment");
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Flags = PdfAnnotationFlags.Locked;
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}
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public IconType Icon
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{
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get
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{
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var iconName = Elements.GetName(Keys.Name);
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if (iconName == null)
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return IconType.PushPin;
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return (IconType)(Enum.Parse(typeof(IconType), iconName));
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}
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set { Elements.SetName(Keys.Name, value.ToString()); }
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}
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public PdfFileSpecification File
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{
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get
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{
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var reference = Elements.GetReference(Keys.FS);
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return reference?.Value as PdfFileSpecification;
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}
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set
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{
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if (value == null)
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{
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Elements.Remove(Keys.FS);
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}
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else
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{
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if (!value.IsIndirect)
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Owner._irefTable.Add(value);
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Elements.SetReference(Keys.FS, value);
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}
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}
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}
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/// <summary>
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/// Predefined keys of this dictionary.
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/// </summary>
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internal new class Keys : PdfAnnotation.Keys
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{
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/// <summary>
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/// (Required) The file associated with this annotation.
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/// </summary>
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[KeyInfo(KeyType.Dictionary | KeyType.Required)]
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public const string FS = "/FS";
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/// <summary>
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/// (Optional) The name of an icon to be used in displaying the annotation.
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/// Viewer applications should provide predefined icon appearances for at least
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/// the following standard names:
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///
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/// Graph
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/// PushPin
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/// Paperclip
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/// Tag
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///
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/// Additional names may be supported as well. Default value: PushPin.
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/// Note: The annotation dictionary’s AP entry, if present, takes precedence over
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/// the Name entry; see Table 8.15 on page 606 and Section 8.4.4, “Appearance Streams.”
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/// </summary>
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[KeyInfo(KeyType.Name | KeyType.Optional)]
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public const string Name = "/Name";
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/// <summary>
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/// Gets the KeysMeta for these keys.
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/// </summary>
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public static DictionaryMeta Meta
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{
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get
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{
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if (Keys.meta == null)
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Keys.meta = CreateMeta(typeof(Keys));
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return Keys.meta;
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}
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}
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static DictionaryMeta meta;
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}
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/// <summary>
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/// Gets the KeysMeta of this dictionary type.
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/// </summary>
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internal override DictionaryMeta Meta
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{
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get { return Keys.Meta; }
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}
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}
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}

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