/* Copyright (c) 2006 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#region Using directives
#define USE_TRACING
using System;
using System.Xml;
using System.IO;
using System.Globalization;
using System.ComponentModel;
using System.Runtime.InteropServices;
#endregion
//////////////////////////////////////////////////////////////////////
// Contains AtomContent, an object to represent the
// atom:content element.
// # atom:content
//
// atomInlineTextContent =
// element atom:content {
// atomCommonAttributes,
// attribute type { "TEXT" | "HTML" | atomMediaType }?,
// (text)*
// }
//
// atomInlineXHTMLContent =
// element atom:content {
// atomCommonAttributes,
// attribute type { "XHTML" | atomMediaType }?,
// (text|anyElement)*
// }
//
// atomOutOfLineContent =
// element atom:content {
// atomCommonAttributes,
// attribute type { "TEXT" | "HTML" | "XHTML" | atomMediaType }?,
// attribute src { atomUri },
// empty
// }
//
// atomContent = atomInlineTextContent
// | atomInlineXHTMLContent
// | atomOutOfLineContent
//////////////////////////////////////////////////////////////////////
namespace Google.GData.Client{
//////////////////////////////////////////////////////////////////////
/// <summary>TypeConverter, so that AtomContentConverter shows up in the property pages
/// </summary>
//////////////////////////////////////////////////////////////////////
[ComVisible(false)]
public class AtomContentConverter : ExpandableObjectConverter
{
///<summary>Standard type converter method</summary>
public override bool CanConvertTo(ITypeDescriptorContext context, System.Type destinationType)
{
if (destinationType == typeof(AtomContent))
return true;
return base.CanConvertTo(context, destinationType);
}
///<summary>Standard type converter method</summary>
public override object ConvertTo(ITypeDescriptorContext context,CultureInfo culture, object value, System.Type destinationType)
{
AtomContent content = value as AtomContent;
if (destinationType == typeof(System.String) && content != null)
{
return "Content-type: " + content.Type;
}
return base.ConvertTo(context, culture, value, destinationType);
}
}
/////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
/// <summary>atom:content object representation
/// </summary>
//////////////////////////////////////////////////////////////////////
[TypeConverterAttribute(typeof(AtomContentConverter)), DescriptionAttribute("Expand to see the content objectfor the entry.")]
public class AtomContent : AtomBase
{
/// <summary>holds the type attribute</summary>
private string type;
/// <summary>holds the src URI attribute</summary>
private AtomUri src;
/// <summary>holds teh content</summary>
private string content;
#region overloaded for persistence
//////////////////////////////////////////////////////////////////////
/// <summary>Returns the constant representing this XML element.</summary>
//////////////////////////////////////////////////////////////////////
public override string XmlName
{
get { return AtomParserNameTable.XmlContentElement; }
}
/////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
/// <summary>figures out if this object should be persisted</summary>
/// <returns> true, if it's worth saving</returns>
//////////////////////////////////////////////////////////////////////
public override bool ShouldBePersisted()
{
if (base.ShouldBePersisted() == false)
{
return Utilities.IsPersistable(this.src) || Utilities.IsPersistable(this.type) || Utilities.IsPersistable(this.content);
}
return true;
}
/////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
/// <summary>overridden to save attributes for this(XmlWriter writer)</summary>
/// <param name="writer">the xmlwriter to save into </param>
//////////////////////////////////////////////////////////////////////
protected override void SaveXmlAttributes(XmlWriter writer)
{
base.SaveXmlAttributes(writer);
WriteEncodedAttributeString(writer, AtomParserNameTable.XmlAttributeSrc, this.Src);
WriteEncodedAttributeString(writer, AtomParserNameTable.XmlAttributeType, this.Type);
}
/////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
/// <summary>saves the inner state of the element</summary>
/// <param name="writer">the xmlWriter to save into </param>
//////////////////////////////////////////////////////////////////////
protected override void SaveInnerXml(XmlWriter writer)
{
base.SaveInnerXml(writer);
WriteEncodedString(writer, this.content);
}
/////////////////////////////////////////////////////////////////////////////
#endregion
//////////////////////////////////////////////////////////////////////
/// <summary>accessor method public string Type</summary>
/// <returns> </returns>
//////////////////////////////////////////////////////////////////////
public string Type
{
get {return this.type;}
set {this.Dirty = true; this.type = value;}
}
/////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
/// <summary>accessor method public Uri Src</summary>
/// <returns> </returns>
//////////////////////////////////////////////////////////////////////
public AtomUri Src
{
get {return this.src;}
set {this.Dirty = true; this.src = value;}
}
/////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
/// <summary>public Uri AbsoluteUri</summary>
//////////////////////////////////////////////////////////////////////
public string AbsoluteUri
{
get
{
return GetAbsoluteUri(this.Src.ToString());
}
}
/////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
/// <summary>accessor method public string Content</summary>
/// <returns> </returns>
//////////////////////////////////////////////////////////////////////
public string Content
{
get {return this.content;}
set {this.Dirty = true; this.content = value;}
}
/////////////////////////////////////////////////////////////////////////////
}
/////////////////////////////////////////////////////////////////////////////
}
/////////////////////////////////////////////////////////////////////////////
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