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//
// System.Xml.XmlDeclaration
//
// Author:
// Duncan Mak (duncan@ximian.com)
// Atsushi Enomotot (atsushi@ximian.com)
//
// (C) Ximian, Inc.
//
// 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.Globalization;
using System.Text;
using System.Xml;
namespace System.Xml
{
public class XmlDeclaration : XmlLinkedNode
{
string encoding = "UTF-8"; // defaults to UTF-8
string standalone;
string version;
protected internal XmlDeclaration (string version, string encoding,
string standalone, XmlDocument doc)
: base (doc)
{
if (encoding == null)
encoding = "";
if (standalone == null)
standalone = "";
this.version = version;
this.encoding = encoding;
this.standalone = standalone;
}
public string Encoding {
get { return encoding; }
set { encoding = (value == null) ? String.Empty : value; }
}
public override string InnerText {
get { return Value; }
set { ParseInput (value); }
}
public override string LocalName {
get { return "xml"; }
}
public override string Name {
get { return "xml"; }
}
public override XmlNodeType NodeType {
get { return XmlNodeType.XmlDeclaration; }
}
public string Standalone {
get { return standalone; }
set {
if(value != null)
{
if (String.Compare (value, "YES", true, CultureInfo.InvariantCulture) == 0)
standalone = "yes";
if (String.Compare (value, "NO", true, CultureInfo.InvariantCulture) == 0)
standalone = "no";
}
else
standalone = String.Empty;
}
}
public override string Value {
get {
string formatEncoding = "";
string formatStandalone = "";
if (encoding != String.Empty)
formatEncoding = String.Format (" encoding=\"{0}\"", encoding);
if (standalone != String.Empty)
formatStandalone = String.Format (" standalone=\"{0}\"", standalone);
return String.Format ("version=\"{0}\"{1}{2}", Version, formatEncoding, formatStandalone);
}
set { ParseInput (value); }
}
public string Version {
get { return version; }
}
public override XmlNode CloneNode (bool deep)
{
return new XmlDeclaration (Version, Encoding, standalone, OwnerDocument);
}
public override void WriteContentTo (XmlWriter w) {}
public override void WriteTo (XmlWriter w)
{
// This doesn't seem to match up very well with w.WriteStartDocument()
// so writing out custom here.
w.WriteRaw (String.Format ("<?xml {0}?>", Value));
}
private int SkipWhitespace (string input, int index)
{
while (index < input.Length) {
if (XmlChar.IsWhitespace (input [index]))
index++;
else
break;
}
return index;
}
void ParseInput (string input)
{
int index = SkipWhitespace (input, 0);
if (index + 7 > input.Length || input.IndexOf ("version", index, 7) != index)
throw new XmlException ("Missing 'version' specification.");
index = SkipWhitespace (input, index + 7);
char c = input [index];
if (c != '=')
throw new XmlException ("Invalid 'version' specification.");
index++;
index = SkipWhitespace (input, index);
c = input [index];
if (c != '"' && c != '\'')
throw new XmlException ("Invalid 'version' specification.");
index++;
int end = input.IndexOf (c, index);
if (end < 0 || input.IndexOf ("1.0", index, 3) != index)
throw new XmlException ("Invalid 'version' specification.");
index += 4;
if (index == input.Length)
return;
if (!XmlChar.IsWhitespace (input [index]))
throw new XmlException ("Invalid XML declaration.");
index = SkipWhitespace (input, index + 1);
if (index == input.Length)
return;
if (input.Length > index + 8 && input.IndexOf ("encoding", index, 8) > 0) {
index = SkipWhitespace (input, index + 8);
c = input [index];
if (c != '=')
throw new XmlException ("Invalid 'version' specification.");
index++;
index = SkipWhitespace (input, index);
c = input [index];
if (c != '"' && c != '\'')
throw new XmlException ("Invalid 'encoding' specification.");
end = input.IndexOf (c, index + 1);
if (end < 0)
throw new XmlException ("Invalid 'encoding' specification.");
Encoding = input.Substring (index + 1, end - index - 1);
index = end + 1;
if (index == input.Length)
return;
if (!XmlChar.IsWhitespace (input [index]))
throw new XmlException ("Invalid XML declaration.");
index = SkipWhitespace (input, index + 1);
return;
}
if (input.Length > index + 10 && input.IndexOf ("standalone", index, 10) > 0) {
index = SkipWhitespace (input, index + 10);
c = input [index];
if (c != '=')
throw new XmlException ("Invalid 'version' specification.");
index++;
index = SkipWhitespace (input, index);
c = input [index];
if (c != '"' && c != '\'')
throw new XmlException ("Invalid 'standalone' specification.");
end = input.IndexOf (c, index + 1);
if (end < 0)
throw new XmlException ("Invalid 'standalone' specification.");
string tmp = input.Substring (index + 1, end - index - 1);
switch (tmp) {
case "yes":
case "no":
break;
default:
throw new XmlException ("Invalid standalone specification.");
}
Standalone = tmp;
index = end + 1;
index = SkipWhitespace (input, index);
}
if (index != input.Length)
throw new XmlException ("Invalid XML declaration.");
}
}
}
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