ContentModel ParseContentModel(char ch)
{
ContentModel cm = new ContentModel();
if (ch == '(')
{
this.current.ReadChar();
ParseModel(')', cm);
ch = this.current.ReadChar();
if (ch == '?' || ch == '+' || ch == '*')
{
cm.AddOccurrence(ch);
this.current.ReadChar();
}
}
else if (ch == '%')
{
Entity e = ParseParameterEntity(SgmlDtd.dcterm);
PushEntity(this.current.ResolvedUri, e);
cm = ParseContentModel(this.current.Lastchar);
PopEntity();
}
else
{
string dc = ScanName(SgmlDtd.dcterm);
cm.SetDeclaredContent(dc);
}
return(cm);
}
void ParseModel(char cmt, ContentModel cm)
{
int depth = cm.CurrentDepth;
char ch = this.current.Lastchar;
ch = this.current.SkipWhitespace();
while (ch != cmt || cm.CurrentDepth > depth)
{
if (ch == Entity.EOF)
{
this.current.Error("Content Model was not closed");
}
if (ch == '%')
{
Entity e = ParseParameterEntity(SgmlDtd.cmterm);
PushEntity(this.current.ResolvedUri, e);
ParseModel(Entity.EOF, cm);
PopEntity();
ch = this.current.SkipWhitespace();
}
else if (ch == '(')
{
cm.PushGroup();
this.current.ReadChar();
ch = this.current.SkipWhitespace();
}
else if (ch == ')')
{
ch = this.current.ReadChar();
if (ch == '*' || ch == '+' || ch == '?')
{
cm.AddOccurrence(ch);
ch = this.current.ReadChar();
}
if (cm.PopGroup() < depth)
{
this.current.Error("Parameter entity cannot close a paren outside it's own scope");
}
ch = this.current.SkipWhitespace();
}
else if (ch == ',' || ch == '|' || ch == '&')
{
cm.AddConnector(ch);
this.current.ReadChar();
ch = this.current.SkipWhitespace();
}
else
{
string token;
if (ch == '#')
{
ch = this.current.ReadChar();
token = "#" + this.current.ScanToken(this.sb, SgmlDtd.cmterm, true);
}
else
{
token = this.current.ScanToken(this.sb, SgmlDtd.cmterm, true);
}
token = token.ToUpper();
token = this.nameTable.Add(token);
ch = this.current.Lastchar;
if (ch == '?' || ch == '+' || ch == '*')
{
cm.PushGroup();
cm.AddSymbol(token);
cm.AddOccurrence(ch);
cm.PopGroup();
this.current.ReadChar();
ch = this.current.SkipWhitespace();
}
else
{
cm.AddSymbol(token);
ch = this.current.SkipWhitespace();
}
}
}
}
ContentModel ParseContentModel(char ch)
{
ContentModel cm = new ContentModel();
if (ch == '(')
{
this.current.ReadChar();
ParseModel(')', cm);
ch = this.current.ReadChar();
if (ch == '?' || ch == '+' || ch == '*')
{
cm.AddOccurrence(ch);
this.current.ReadChar();
}
}
else if (ch == '%')
{
Entity e = ParseParameterEntity(SgmlDtd.dcterm);
PushEntity(this.current.ResolvedUri, e);
cm = ParseContentModel(this.current.Lastchar);
PopEntity();
}
else
{
string dc = ScanName(SgmlDtd.dcterm);
cm.SetDeclaredContent(dc);
}
return cm;
}
void ParseModel(char cmt, ContentModel cm)
{
int depth = cm.CurrentDepth;
char ch = this.current.Lastchar;
ch = this.current.SkipWhitespace();
while (ch != cmt || cm.CurrentDepth > depth)
{
if (ch == Entity.EOF)
{
this.current.Error("Content Model was not closed");
}
if (ch == '%')
{
Entity e = ParseParameterEntity(SgmlDtd.cmterm);
PushEntity(this.current.ResolvedUri, e);
ParseModel(Entity.EOF, cm);
PopEntity();
ch = this.current.SkipWhitespace();
}
else if (ch == '(')
{
cm.PushGroup();
this.current.ReadChar();
ch = this.current.SkipWhitespace();
}
else if (ch == ')')
{
ch = this.current.ReadChar();
if (ch == '*' || ch == '+' || ch == '?')
{
cm.AddOccurrence(ch);
ch = this.current.ReadChar();
}
if (cm.PopGroup() < depth)
{
this.current.Error("Parameter entity cannot close a paren outside it's own scope");
}
ch = this.current.SkipWhitespace();
}
else if (ch == ',' || ch == '|' || ch == '&')
{
cm.AddConnector(ch);
this.current.ReadChar();
ch = this.current.SkipWhitespace();
}
else
{
string token;
if (ch == '#')
{
ch = this.current.ReadChar();
token = "#" + this.current.ScanToken(this.sb, SgmlDtd.cmterm, true);
}
else
{
token = this.current.ScanToken(this.sb, SgmlDtd.cmterm, true);
}
token = token.ToUpper();
token = this.nameTable.Add(token);
ch = this.current.Lastchar;
if (ch == '?' || ch == '+' || ch == '*')
{
cm.PushGroup();
cm.AddSymbol(token);
cm.AddOccurrence(ch);
cm.PopGroup();
this.current.ReadChar();
ch = this.current.SkipWhitespace();
}
else
{
cm.AddSymbol(token);
ch = this.current.SkipWhitespace();
}
}
}
}