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#region PDFsharp - A .NET library for processing PDF
//
// Authors:
// Stefan Lange (mailto:Stefan.Lange@pdfsharp.com)
//
// Copyright (c) 2005-2008 empira Software GmbH, Cologne (Germany)
//
// http://www.pdfsharp.com
// http://sourceforge.net/projects/pdfsharp
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
#endregion
using System;
using System.Diagnostics;
using System.Collections;
using System.Reflection;
using PdfSharp.Pdf.IO;
namespace PdfSharp.Pdf
{
/// <summary>
/// Hold information about the value of a key in a dictionary. This information is used to create
/// interpred this value.
/// </summary>
internal sealed class KeyDescriptor
{
/// <summary>
/// Initializes a new instance of KeyDescriptor from the specified attribute during a KeysMeta
/// initializes itself using reflection.
/// </summary>
public KeyDescriptor(KeyInfoAttribute attribute)
{
this.version = attribute.Version;
this.keyType = attribute.KeyType;
this.fixedValue = attribute.FixedValue;
this.objectType = attribute.ObjectType;
if (this.version == "")
version = "1.0";
}
/// <summary>
/// Gets or sets the PDF version starting with the availability of the described key.
/// </summary>
public string Version
{
get { return this.version; }
set { this.version = value; }
}
string version;
public KeyType KeyType
{
get { return this.keyType; }
set { this.keyType = value; }
}
KeyType keyType;
public string KeyValue
{
get { return this.keyValue; }
set { this.keyValue = value; }
}
string keyValue;
public string FixedValue
{
get { return this.fixedValue; }
}
string fixedValue;
public Type ObjectType
{
get { return this.objectType; }
set { this.objectType = value; }
}
Type objectType;
public bool CanBeIndirect
{
get { return (this.keyType & KeyType.MustNotBeIndirect) == 0; }
}
/// <summary>
/// Returns the type of the object to be created as value for the described key.
/// </summary>
public Type GetValueType()
{
Type type = this.objectType;
if (type == null)
{
// If we have no ObjectType specified, use the KeyType enumeration.
switch (this.keyType & KeyType.TypeMask)
{
case KeyType.Name:
type = typeof(PdfName);
break;
case KeyType.String:
type = typeof(PdfString);
break;
case KeyType.Boolean:
type = typeof(PdfBoolean);
break;
case KeyType.Integer:
type = typeof(PdfInteger);
break;
case KeyType.Real:
type = typeof(PdfReal);
break;
case KeyType.Date:
type = typeof(PdfDate);
break;
case KeyType.Rectangle:
type = typeof(PdfRectangle);
break;
case KeyType.Array:
type = typeof(PdfArray);
break;
case KeyType.Dictionary:
type = typeof(PdfDictionary);
break;
case KeyType.Stream:
type = typeof(PdfDictionary);
break;
// The following types are not yet used
case KeyType.NumberTree:
throw new NotImplementedException("KeyType.NumberTree");
case KeyType.NameOrArray:
throw new NotImplementedException("KeyType.NameOrArray");
case KeyType.ArrayOrDictionary:
throw new NotImplementedException("KeyType.ArrayOrDictionary");
case KeyType.StreamOrArray:
throw new NotImplementedException("KeyType.StreamOrArray");
case KeyType.ArrayOrNameOrString:
throw new NotImplementedException("KeyType.ArrayOrNameOrString");
default:
Debug.Assert(false, "Invalid KeyType: " + this.keyType.ToString());
break;
}
}
return type;
}
}
/// <summary>
/// Contains meta information about all keys of a PDF dictionary.
/// </summary>
internal class DictionaryMeta
{
public DictionaryMeta(Type type)
{
FieldInfo[] fields = type.GetFields(BindingFlags.Public | BindingFlags.Static | BindingFlags.FlattenHierarchy);
foreach (FieldInfo field in fields)
{
object[] attributes = field.GetCustomAttributes(typeof(KeyInfoAttribute), false);
if (attributes.Length == 1)
{
KeyInfoAttribute attribute = (KeyInfoAttribute)attributes[0];
KeyDescriptor descriptor = new KeyDescriptor(attribute);
descriptor.KeyValue = (string)field.GetValue(null);
this.keyDescriptors[descriptor.KeyValue] = descriptor;
}
}
}
public KeyDescriptor this[string key]
{
get { return (KeyDescriptor)this.keyDescriptors[key]; }
}
Hashtable keyDescriptors = new Hashtable();
}
}
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