internal AttributeToken GetAttributeState(int tagEnd, bool artifactTag, bool getValueInfo) {
int eqPos = -1;
bool isScript = false;
IHtmlToken nameToken = null;
AttributeToken attributeToken = null;
_tokenizer.SkipWhitespace();
if (!_cs.IsEndOfStream()) {
nameToken = _tokenizer.GetNameToken(tagEnd, artifactTag);
// Allow whitespace before = per HTML standard
_tokenizer.SkipWhitespace();
if (_cs.CurrentChar != '=' && nameToken != null) {
// standalone attribute
return new AttributeToken(nameToken);
}
if (_cs.CurrentChar == '=') {
eqPos = _cs.Position;
_cs.MoveToNextChar();
}
IHtmlAttributeValueToken value = null;
if (getValueInfo) {
// Allow whitespace before = per HTML standard
_tokenizer.SkipWhitespace();
// Check if attribute name begins with 'on' which means its value is script like
// onclick="...". Script can legally include < > (like in if(x < y)... so we are
// going to assume that everything between quotes is the script code. Note also
// that script should always be quoted. If quote is missing, we assume that
// attribute has no value. We cannot tell if attribute is script if attribute name
// is an artifact, so we don't support <% %> = "script code".
if (_cs.IsAtString() && nameToken != null && nameToken.Length >= 2) {
char c1 = _cs[nameToken.Start];
char c2 = _cs[nameToken.Start + 1];
if ((c1 == 'o' || c1 == 'O') && (c2 == 'n' || c2 == 'N')) {
isScript = true;
}
}
value = GetAttributeValue(isScript, tagEnd);
// In some odd cases we may end up with no name, no equals sign and no value.
// Check if this is the case and if so, advance character stream position
// and try again.
if (nameToken != null || eqPos >= 0 || value != null) {
attributeToken = new AttributeToken(nameToken, eqPos, value);
} else {
// We could not make sense at all - move on.
_cs.MoveToNextChar();
}
}
}
return attributeToken;
}
public static AttributeNode Create(ElementNode parent, AttributeToken token) {
var nameToken = token.NameToken as NameToken;
if (nameToken != null && nameToken.HasPrefix())
return new AttributeNodeWithPrefix(parent, token);
return new AttributeNode(parent, token);
}
protected AttributeNode(ElementNode parent, AttributeToken token) {
AttributeToken = token;
if (parent != null && parent.Root.Tree != null) {
var nameToken = token.NameToken as NameToken;
if (token.HasName())
_name = parent.GetText(nameToken != null ? nameToken.NameRange : token);
else
_name = String.Empty;
UpdateValue(parent.TextProvider);
}
}
public AttributeNodeWithPrefix(ElementNode parent, AttributeToken token) :
base(parent, token) {
var nameToken = token.NameToken as NameToken;
Prefix = parent != null ? parent.GetText(nameToken.PrefixRange) : string.Empty;
}
public HtmlParserAttributeEventArgs(AttributeToken attributeToken) {
AttributeToken = attributeToken;
}
