/// <summary>
/// Tests whether this element can contain another specified element.
/// </summary>
/// <param name="name">The name of the element to check for.</param>
/// <param name="dtd">The DTD to use to do the check.</param>
/// <returns>True if the specified element can be contained by this element.</returns>
public bool CanContain(string name, SgmlDtd dtd)
{
if (_exclusions.ContainsIgnoreCase(name))
{
return(false);
}
return(_inclusions.ContainsIgnoreCase(name) || ContentModel.CanContain(name, dtd));
}
/// <summary>
/// Checks whether an element using this group can contain a specified element.
/// </summary>
/// <param name="name">The name of the element to look for.</param>
/// <param name="dtd">The DTD to use during the checking.</param>
/// <returns>true if an element using this group can contain the element, otherwise false.</returns>
/// <remarks>
/// Rough approximation - this is really assuming an "Or" group
/// </remarks>
public bool CanContain(string name, SgmlDtd dtd)
{
if (dtd == null)
{
throw new ArgumentNullException("dtd");
}
// Do a simple search of members.
if (_members.OfType <string>().Any(s => s.Equals(name, StringComparison.OrdinalIgnoreCase)))
{
return(true);
}
// didn't find it, so do a more expensive search over child elements
// that have optional start tags and over child groups.
foreach (var obj in _members)
{
var s = obj as string;
if (s != null)
{
var e = dtd.FindElement(s);
if (e != null)
{
if (e.StartTagOptional)
{
// tricky case, the start tag is optional so element may be
// allowed inside this guy!
if (e.CanContain(name, dtd))
{
return(true);
}
}
}
}
else
{
var m = (Group)obj;
if (m.CanContain(name, dtd))
{
return(true);
}
}
}
return(false);
}
public static SgmlDtd Parse(Uri baseUri, string name, TextReader input, string subset, string proxy, XmlNameTable nt)
{
var dtd = new SgmlDtd(name, nt);
dtd.PushEntity(baseUri, new Entity(dtd.Name, baseUri, input, proxy));
if (!string.IsNullOrEmpty(subset))
{
dtd.PushEntity(baseUri, new Entity(name, subset));
}
try {
dtd.Parse();
}
catch (ApplicationException e) {
throw new SgmlParseException(e.Message + dtd._current.Context());
}
return(dtd);
}
private void SetHtmlDtd( Uri baseUri )
{
var assembly = typeof( SgmlReader ).Assembly;
var name = assembly.FullName.Split( ',' )[ 0 ] + ".Html.dtd";
var stream = assembly.GetManifestResourceStream( name );
if( stream == null ) return;
var reader = new StreamReader( stream );
_dtd = SgmlDtd.Parse( baseUri, "HTML", reader, null, _proxy, null );
}
private void SetDtd( Uri baseUri )
{
if( _dtd != null || _ignoreDtd ) return;
if( string.IsNullOrEmpty( _systemLiteral ) ) {
if( _docType != null && _docType.EqualsIgnoreCase( "html" ) ) {
SetHtmlDtd( baseUri );
}
}
else {
if( baseUri != null ) {
baseUri = new Uri( baseUri, _systemLiteral );
}
else if( _baseUri != null ) {
baseUri = new Uri( _baseUri, _systemLiteral );
}
else {
baseUri = new Uri( new Uri( Directory.GetCurrentDirectory() + "\\" ), _systemLiteral );
}
_dtd = SgmlDtd.Parse( baseUri, _docType, _publicIdentifier, baseUri.AbsoluteUri, _subset, _proxy, null );
}
}
/// <summary>
/// Parses a DTD and creates a <see cref="SgmlDtd"/> instance that encapsulates the DTD.
/// </summary>
/// <param name="baseUri">The base URI of the DTD.</param>
/// <param name="name">The name of the DTD.</param>
/// <param name="pubid"></param>
/// <param name="url"></param>
/// <param name="subset"></param>
/// <param name="proxy"></param>
/// <param name="nt">The <see cref="XmlNameTable"/> is NOT used.</param>
/// <returns>A new <see cref="SgmlDtd"/> instance that encapsulates the DTD.</returns>
public static SgmlDtd Parse( Uri baseUri, string name, string pubid, string url, string subset, string proxy, XmlNameTable nt )
{
var dtd = new SgmlDtd( name, nt );
if( !string.IsNullOrEmpty( url ) ) {
dtd.PushEntity( baseUri, new Entity( dtd.Name, pubid, url, proxy ) );
}
if( !string.IsNullOrEmpty( subset ) ) {
dtd.PushEntity( baseUri, new Entity( name, subset ) );
}
try {
dtd.Parse();
}
catch( ApplicationException e ) {
throw new SgmlParseException( e.Message + dtd._current.Context() );
}
return dtd;
}
/// <summary>
/// Tests whether this element can contain another specified element.
/// </summary>
/// <param name="name">The name of the element to check for.</param>
/// <param name="dtd">The DTD to use to do the check.</param>
/// <returns>True if the specified element can be contained by this element.</returns>
public bool CanContain( string name, SgmlDtd dtd )
{
if( _exclusions.ContainsIgnoreCase( name ) ) return false;
return _inclusions.ContainsIgnoreCase( name ) || ContentModel.CanContain( name, dtd );
}
/// <summary>
/// Checks whether an element using this group can contain a specified element.
/// </summary>
/// <param name="name">The name of the element to look for.</param>
/// <param name="dtd">The DTD to use during the checking.</param>
/// <returns>true if an element using this group can contain the element, otherwise false.</returns>
/// <remarks>
/// Rough approximation - this is really assuming an "Or" group
/// </remarks>
public bool CanContain( string name, SgmlDtd dtd )
{
if( dtd == null )
throw new ArgumentNullException( "dtd" );
// Do a simple search of members.
if( _members.OfType<string>().Any( s => s.Equals( name, StringComparison.OrdinalIgnoreCase ) ) ) {
return true;
}
// didn't find it, so do a more expensive search over child elements
// that have optional start tags and over child groups.
foreach( var obj in _members ) {
var s = obj as string;
if( s != null ) {
var e = dtd.FindElement( s );
if( e != null ) {
if( e.StartTagOptional ) {
// tricky case, the start tag is optional so element may be
// allowed inside this guy!
if( e.CanContain( name, dtd ) )
return true;
}
}
}
else {
var m = (Group) obj;
if( m.CanContain( name, dtd ) )
return true;
}
}
return false;
}
/// <summary>
/// Checks whether an element using this group can contain a specified element.
/// </summary>
/// <param name="name">The name of the element to look for.</param>
/// <param name="dtd">The DTD to use during the checking.</param>
/// <returns>true if an element using this group can contain the element, otherwise false.</returns>
public bool CanContain(string name, SgmlDtd dtd)
{
return(DeclaredContent == DeclaredContent.Default && _model.CanContain(name, dtd));
}
/// <summary>
/// Checks whether an element using this group can contain a specified element.
/// </summary>
/// <param name="name">The name of the element to look for.</param>
/// <param name="dtd">The DTD to use during the checking.</param>
/// <returns>true if an element using this group can contain the element, otherwise false.</returns>
public bool CanContain( string name, SgmlDtd dtd )
{
return DeclaredContent == DeclaredContent.Default && _model.CanContain( name, dtd );
}
