/// <summary>
/// See 8.2.4.35 Attribute name state
/// </summary>
/// <param name="tag">The current tag token.</param>
HtmlToken AttributeName(HtmlTagToken tag)
{
while (true)
{
var c = GetNext();
if (c == Symbols.Equality)
{
tag.AddAttribute(_stringBuffer.ToString());
_stringBuffer.Clear();
return AttributeBeforeValue(tag);
}
else if (c == Symbols.GreaterThan)
{
tag.AddAttribute(_stringBuffer.ToString());
_stringBuffer.Clear();
return EmitTag(tag);
}
else if (c.IsSpaceCharacter())
{
tag.AddAttribute(_stringBuffer.ToString());
_stringBuffer.Clear();
return AttributeAfterName(tag);
}
else if (c == Symbols.Solidus)
{
tag.AddAttribute(_stringBuffer.ToString());
_stringBuffer.Clear();
return TagSelfClosing(tag);
}
else if (c.IsUppercaseAscii())
{
_stringBuffer.Append(Char.ToLower(c));
}
else if (c == Symbols.DoubleQuote || c == Symbols.SingleQuote || c == Symbols.LessThan)
{
RaiseErrorOccurred(HtmlParseError.AttributeNameInvalid);
_stringBuffer.Append(c);
}
else if(c == Symbols.Null)
{
RaiseErrorOccurred(HtmlParseError.Null);
_stringBuffer.Append(Symbols.Replacement);
}
else if (c != Symbols.EndOfFile)
{
_stringBuffer.Append(c);
}
else
{
return NewEof();
}
}
}
private HtmlToken ParseAttributes(HtmlTagToken tag)
{
var state = AttributeState.BeforeName;
var quote = Symbols.DoubleQuote;
var c = Symbols.Null;
while (true)
{
switch (state)
{
// See 8.2.4.34 Before attribute name state
case AttributeState.BeforeName:
{
c = SkipSpaces();
if (c == Symbols.Solidus)
{
return TagSelfClosing(tag);
}
else if (c == Symbols.GreaterThan)
{
return EmitTag(tag);
}
else if (c.IsUppercaseAscii())
{
StringBuffer.Append(Char.ToLowerInvariant(c));
state = AttributeState.Name;
}
else if (c == Symbols.Null)
{
AppendReplacement();
state = AttributeState.Name;
}
else if (c == Symbols.SingleQuote || c == Symbols.DoubleQuote || c == Symbols.Equality || c == Symbols.LessThan)
{
RaiseErrorOccurred(HtmlParseError.AttributeNameInvalid);
StringBuffer.Append(c);
state = AttributeState.Name;
}
else if (c != Symbols.EndOfFile)
{
StringBuffer.Append(c);
state = AttributeState.Name;
}
else
{
return NewEof();
}
break;
}
// See 8.2.4.35 Attribute name state
case AttributeState.Name:
{
c = GetNext();
if (c == Symbols.Equality)
{
tag.AddAttribute(FlushBuffer());
state = AttributeState.BeforeValue;
}
else if (c == Symbols.GreaterThan)
{
tag.AddAttribute(FlushBuffer());
return EmitTag(tag);
}
else if (c.IsSpaceCharacter())
{
tag.AddAttribute(FlushBuffer());
state = AttributeState.AfterName;
}
else if (c == Symbols.Solidus)
{
tag.AddAttribute(FlushBuffer());
return TagSelfClosing(tag);
}
else if (c.IsUppercaseAscii())
{
StringBuffer.Append(Char.ToLowerInvariant(c));
}
else if (c == Symbols.DoubleQuote || c == Symbols.SingleQuote || c == Symbols.LessThan)
{
RaiseErrorOccurred(HtmlParseError.AttributeNameInvalid);
StringBuffer.Append(c);
}
else if (c == Symbols.Null)
{
AppendReplacement();
}
else if (c != Symbols.EndOfFile)
{
StringBuffer.Append(c);
}
else
{
return NewEof();
}
break;
}
// See 8.2.4.36 After attribute name state
case AttributeState.AfterName:
{
c = SkipSpaces();
if (c == Symbols.GreaterThan)
{
return EmitTag(tag);
}
else if (c == Symbols.Equality)
{
state = AttributeState.BeforeValue;
}
else if (c == Symbols.Solidus)
{
return TagSelfClosing(tag);
}
else if (c.IsUppercaseAscii())
{
StringBuffer.Append(Char.ToLowerInvariant(c));
state = AttributeState.Name;
}
else if (c == Symbols.DoubleQuote || c == Symbols.SingleQuote || c == Symbols.LessThan)
{
RaiseErrorOccurred(HtmlParseError.AttributeNameInvalid);
StringBuffer.Append(c);
state = AttributeState.Name;
}
else if (c == Symbols.Null)
{
AppendReplacement();
state = AttributeState.Name;
}
else if (c != Symbols.EndOfFile)
{
StringBuffer.Append(c);
state = AttributeState.Name;
}
else
{
return NewEof();
}
break;
}
// See 8.2.4.37 Before attribute value state
case AttributeState.BeforeValue:
{
c = SkipSpaces();
if (c == Symbols.DoubleQuote || c == Symbols.SingleQuote)
{
state = AttributeState.QuotedValue;
quote = c;
}
else if (c == Symbols.Ampersand)
{
state = AttributeState.UnquotedValue;
}
else if (c == Symbols.GreaterThan)
{
RaiseErrorOccurred(HtmlParseError.TagClosedWrong);
return EmitTag(tag);
}
else if (c == Symbols.LessThan || c == Symbols.Equality || c == Symbols.CurvedQuote)
{
RaiseErrorOccurred(HtmlParseError.AttributeValueInvalid);
StringBuffer.Append(c);
state = AttributeState.UnquotedValue;
c = GetNext();
}
else if (c == Symbols.Null)
{
AppendReplacement();
state = AttributeState.UnquotedValue;
c = GetNext();
}
else if (c != Symbols.EndOfFile)
{
StringBuffer.Append(c);
state = AttributeState.UnquotedValue;
c = GetNext();
}
else
{
return NewEof();
}
break;
}
// See 8.2.4.38 Attribute value (double-quoted) state
// and 8.2.4.39 Attribute value (single-quoted) state
case AttributeState.QuotedValue:
{
c = GetNext();
if (c == quote)
{
tag.SetAttributeValue(FlushBuffer());
state = AttributeState.AfterValue;
}
else if (c == Symbols.Ampersand)
{
AppendCharacterReference(GetNext(), quote);
}
else if (c == Symbols.Null)
{
AppendReplacement();
}
else if (c != Symbols.EndOfFile)
{
StringBuffer.Append(c);
}
else
{
return NewEof();
}
break;
}
// See 8.2.4.40 Attribute value (unquoted) state
case AttributeState.UnquotedValue:
{
if (c == Symbols.GreaterThan)
{
tag.SetAttributeValue(FlushBuffer());
return EmitTag(tag);
}
else if (c.IsSpaceCharacter())
{
tag.SetAttributeValue(FlushBuffer());
state = AttributeState.BeforeName;
}
else if (c == Symbols.Ampersand)
{
AppendCharacterReference(GetNext(), Symbols.GreaterThan);
c = GetNext();
}
else if (c == Symbols.Null)
{
AppendReplacement();
c = GetNext();
}
else if (c == Symbols.DoubleQuote || c == Symbols.SingleQuote || c == Symbols.LessThan || c == Symbols.Equality || c == Symbols.CurvedQuote)
{
RaiseErrorOccurred(HtmlParseError.AttributeValueInvalid);
StringBuffer.Append(c);
c = GetNext();
}
else if (c != Symbols.EndOfFile)
{
StringBuffer.Append(c);
c = GetNext();
}
else
{
return NewEof();
}
break;
}
// See 8.2.4.42 After attribute value (quoted) state
case AttributeState.AfterValue:
{
c = GetNext();
if (c == Symbols.GreaterThan)
{
return EmitTag(tag);
}
else if (c.IsSpaceCharacter())
{
state = AttributeState.BeforeName;
}
else if (c == Symbols.Solidus)
{
return TagSelfClosing(tag);
}
else if (c == Symbols.EndOfFile)
{
return NewEof();
}
else
{
RaiseErrorOccurred(HtmlParseError.AttributeNameExpected);
Back();
state = AttributeState.BeforeName;
}
break;
}
}
}
}