/// <summary>
/// Initializes a new element declaration instance.
/// </summary>
/// <param name="name">The name of the element.</param>
/// <param name="startTagOptional">Whether the start tag is optional.</param>
/// <param name="endTagOptiona">Whether the end tag is optional.</param>
/// <param name="model">The <see cref="ContentModel"/> of the element.</param>
/// <param name="inclusions"></param>
/// <param name="exclusions"></param>
public ElementDeclaration(string name, bool startTagOptional,
bool endTagOptional, ContentModel model,
string[] inclusions, string[] exclusions)
{
_name = name;
_startTagOptional = startTagOptional;
_endTagOptional = endTagOptional;
_contentModel = model;
_inclusions = inclusions;
_exclusions = exclusions;
}
private void ParseModel(char cmt, ContentModel cm)
{
int depth = cm.CurrentDepth;
char ch = _current.LastChar;
ch = _current.SkipWhitespace();
while (ch != cmt || cm.CurrentDepth > depth)
{
if (ch == Entity.EOF)
{
throw Error.ContentModelWasNotClosed();
}
if (ch == '%')
{
Entity e = ParseParameterEntity(_contentModelTerm);
PushEntity(_current.ResolvedUri, e);
ParseModel(Entity.EOF, cm);
PopEntity();
ch = _current.SkipWhitespace();
}
else if (ch == '(')
{
cm.PushGroup();
_current.ReadChar();
ch = _current.SkipWhitespace();
}
else if (ch == ')')
{
ch = _current.ReadChar();
if (ch == '*' || ch == '+' || ch == '?')
{
cm.AddOccurrence(ch);
ch = _current.ReadChar();
}
if (cm.PopGroup() < depth)
{
throw Error.ParameterEntityClosedOutsideTheScope();
}
ch = _current.SkipWhitespace();
}
else if (ch == ',' || ch == '|' || ch == '&')
{
cm.AddConnector(ch);
_current.ReadChar(); // skip connector
ch = _current.SkipWhitespace();
}
else
{
string token;
if (ch == '#')
{
ch = _current.ReadChar();
token = "#" + _current.ScanToken(_builder, _contentModelTerm, true);
}
else
{
token = _current.ScanToken(_builder, SgmlDtd._contentModelTerm, true);
}
token = token.ToUpper(CultureInfo.InvariantCulture);
ch = _current.LastChar;
if (ch == '?' || ch == '+' || ch == '*')
{
cm.PushGroup();
cm.AddSymbol(token);
cm.AddOccurrence(ch);
cm.PopGroup();
_current.ReadChar(); // skip connector
ch = _current.SkipWhitespace();
}
else
{
cm.AddSymbol(token);
ch = _current.SkipWhitespace();
}
}
}
}
private void ParseModel(char cmt, ContentModel cm)
{
int depth = cm.CurrentDepth;
char ch = _current.LastChar;
ch = _current.SkipWhitespace();
while (ch != cmt || cm.CurrentDepth > depth)
{
if (ch == Entity.EOF)
throw Error.ContentModelWasNotClosed();
if (ch == '%')
{
Entity e = ParseParameterEntity(_contentModelTerm);
PushEntity(_current.ResolvedUri, e);
ParseModel(Entity.EOF, cm);
PopEntity();
ch = _current.SkipWhitespace();
}
else if (ch == '(')
{
cm.PushGroup();
_current.ReadChar();
ch = _current.SkipWhitespace();
}
else if (ch == ')')
{
ch = _current.ReadChar();
if (ch == '*' || ch == '+' || ch == '?')
{
cm.AddOccurrence(ch);
ch = _current.ReadChar();
}
if (cm.PopGroup() < depth)
throw Error.ParameterEntityClosedOutsideTheScope();
ch = _current.SkipWhitespace();
}
else if (ch == ',' || ch == '|' || ch == '&')
{
cm.AddConnector(ch);
_current.ReadChar(); // skip connector
ch = _current.SkipWhitespace();
}
else
{
string token;
if (ch == '#')
{
ch = _current.ReadChar();
token = "#" + _current.ScanToken(_builder, _contentModelTerm, true);
}
else
{
token = _current.ScanToken(_builder, SgmlDtd._contentModelTerm, true);
}
token = token.ToUpper(CultureInfo.InvariantCulture);
ch = _current.LastChar;
if (ch == '?' || ch == '+' || ch == '*')
{
cm.PushGroup();
cm.AddSymbol(token);
cm.AddOccurrence(ch);
cm.PopGroup();
_current.ReadChar(); // skip connector
ch = _current.SkipWhitespace();
}
else
{
cm.AddSymbol(token);
ch = _current.SkipWhitespace();
}
}
}
}
private void ParseElementDeclaration()
{
char ch = _current.SkipWhitespace();
string[] names = ParseNameGroup(ch, true);
ch = Char.ToUpper(_current.SkipWhitespace(), CultureInfo.InvariantCulture);
bool sto = false;
bool eto = false;
if (ch == 'O' || ch == '-')
{
sto = (ch == 'O'); // start tag optional?
_current.ReadChar();
ch = Char.ToUpper(_current.SkipWhitespace(), CultureInfo.InvariantCulture);
if (ch == 'O' || ch == '-')
{
eto = (ch == 'O'); // end tag optional?
ch = _current.ReadChar();
}
}
ch = _current.SkipWhitespace();
ContentModel cm = ParseContentModel(ch);
ch = _current.SkipWhitespace();
string[] exclusions = null;
string[] inclusions = null;
if (ch == '-')
{
ch = _current.ReadChar();
if (ch == '(')
{
exclusions = ParseNameGroup(ch, true);
ch = _current.SkipWhitespace();
}
else if (ch == '-')
{
ch = ParseDeclarationComment(false);
}
else
{
throw Error.InvalidDeclarationSyntax(ch);
}
}
if (ch == '-')
{
ch = ParseDeclarationComments();
}
if (ch == '+')
{
ch = _current.ReadChar();
if (ch != '(')
{
throw Error.ExpectingInclusionsNameGroup(ch);
}
inclusions = ParseNameGroup(ch, true);
ch = _current.SkipWhitespace();
}
if (ch == '-')
{
ch = ParseDeclarationComments();
}
if (ch != '>')
{
throw Error.ExpectingEndOfElementDeclaration(ch);
}
foreach (string name in names)
{
string atom = name.ToUpper(CultureInfo.InvariantCulture);
_elements.Add(atom, new ElementDeclaration(atom, sto, eto, cm, inclusions, exclusions));
}
}
private ContentModel ParseContentModel(char ch)
{
ContentModel cm = new ContentModel();
if (ch == '(')
{
_current.ReadChar();
ParseModel(')', cm);
ch = _current.ReadChar();
if (ch == '?' || ch == '+' || ch == '*')
{
cm.AddOccurrence(ch);
_current.ReadChar();
}
}
else if (ch == '%')
{
Entity e = ParseParameterEntity(_declaredContentTerm);
PushEntity(_current.ResolvedUri, e);
cm = ParseContentModel(_current.LastChar);
PopEntity();
}
else
{
string dc = ScanName(_declaredContentTerm);
cm.SetDeclaredContent(dc);
}
return cm;
}
