//
// XmlWriterEmitter.cs
//
// Authors:
//	Oleg Tkachenko (oleg@tkachenko.com)
//	Atsushi Enomoto (atsushi@ximian.com)
//	
// (C) 2003 Oleg Tkachenko
// (C) 2004 Atsushi Enomoto
//

//
// 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.
//

using System;
using System.Text;
using System.Xml;

namespace Mono.Xml.Xsl 
{
	/// <summary>
	/// Emitter, which emits result tree to a XmlWriter.
	/// </summary>
	internal class XmlWriterEmitter : Emitter 
	{
		XmlWriter writer;
			
		public XmlWriterEmitter (XmlWriter writer) {
			this.writer = writer;
		}

		#region # Emitter's methods implementaion
		
		public override void WriteStartDocument (Encoding encoding, StandaloneType standalone)
		{
#if docent
			if (standalone == StandaloneType.NONE)
				writer.WriteStartDocument ();
			else
				writer.WriteStartDocument (standalone == StandaloneType.YES);
#else
			string standaloneStr = "";
			switch (standalone) {
			case StandaloneType.YES:
				standaloneStr = " standalone=\"yes\"";
				break;
			case StandaloneType.NO:
				standaloneStr = " standalone=\"no\"";
				break;
			}

			if (encoding == null)
				writer.WriteProcessingInstruction ("xml", "version=\"1.0\"" + standaloneStr);
			else
				writer.WriteProcessingInstruction ("xml", 
					"version=\"1.0\" encoding=\"" 
					+ encoding.WebName + "\"" 
					+ standaloneStr);
#endif
		}
		
		public override void WriteEndDocument ()
		{
#if docent
			writer.WriteEndDocument ();
#endif
		}

		public override void WriteDocType (string type, string publicId, string systemId)
		{
			if (systemId == null) {
				return;
			}
			writer.WriteDocType (type, publicId, systemId, null);
		}

		public override void WriteStartElement (string prefix, string localName, string nsURI)
		{
			writer.WriteStartElement (prefix, localName, nsURI);
		}

		public override void WriteEndElement ()
		{
			writer.WriteEndElement ();
		}

		public override void WriteFullEndElement ()
		{
			writer.WriteFullEndElement ();
		}

		public override void WriteAttributeString (string prefix, string localName, string nsURI, string value)
		{
			writer.WriteAttributeString (prefix, localName, nsURI, value);
		}		

		public override void WriteComment (string text) {
			//FIXME: horrible performance!!!
			while (text.IndexOf ("--")>=0)
				text = text.Replace ("--", "- -");

			if ((text.EndsWith("-")))
				text += ' ';

			writer.WriteComment (text);
		}

		public override void WriteProcessingInstruction (string name, string text)
		{
			while (text.IndexOf ("?>") >= 0)
				text = text.Replace ("?>", "? >");
			writer.WriteProcessingInstruction (name, text);
		}

		public override void WriteString (string text)
		{
			writer.WriteString (text);
		}

		public override void WriteRaw (string data)
		{
			writer.WriteRaw (data);
		}

		public override void WriteCDataSection (string text)
		{
			int index = text.IndexOf ("]]>");
			if (index >= 0) {
				writer.WriteCData (text.Substring (0, index + 2));
				WriteCDataSection (text.Substring (index + 2));
			} else 
				writer.WriteCData (text);
		}

		public override void WriteWhitespace (string value)
		{
			writer.WriteWhitespace (value);
		}

		public override void Done ()
		{
			writer.Flush ();
		}
		#endregion
	}
}