/////////////////////////////////////////////////////////////////////////////////
/// <summary>
///
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public DCssSelector ResolveSelector(string input)
{
System.Diagnostics.Debug.Assert(input != null);
DCssSelector selector = new DCssSelector();
string[] selectorList = input.Split(CHtmlUtil.WhiteSpaceCharsArray);
StringBuilder builder = new StringBuilder();
bool combinatorExist = false;
for (int tokenIndex = 0, count = selectorList.Length; tokenIndex < count; ++tokenIndex)
{
string token = selectorList[tokenIndex];
if (token.Equals('+')) // combinator +
{
if (selector.Count != 0 && combinatorExist == false)
{
selector[selector.Count - 1].Combinator = DCssSimpleSelector.Relation.Sibling;
combinatorExist = true;
}
else
{
throw new ParseExeception();
}
}
else if (token.Equals('>')) // combinator >
{
if (selector.Count != 0 && combinatorExist == false)
{
selector[selector.Count - 1].Combinator = DCssSimpleSelector.Relation.Child;
combinatorExist = true;
}
else
{
throw new ParseExeception();
}
}
else
{
DCssSimpleSelector simpleSelector = new DCssSimpleSelector();
builder.Length = 0;
int index = 0;
while (index < token.Length)
{
if (token[index].Equals('#')) // id
{
index += 1;
if (index >= token.Length)
{
throw new ParseExeception();
}
int nextIndex = token.IndexOfAny("#.:[".ToCharArray(), index);
if (nextIndex != -1)
{
simpleSelector.ID = token.Substring(index, nextIndex - index);
index = nextIndex;
}
else
{
simpleSelector.ID = token.Substring(index);
index = token.Length;
}
}
else if (token[index].Equals('.')) // class
{
index += 1;
if (index >= token.Length)
{
throw new ParseExeception();
}
int nextIndex = token.IndexOfAny("#.:[".ToCharArray(), index);
if (nextIndex != -1)
{
simpleSelector.Class = token.Substring(index, nextIndex - index);
index = nextIndex;
}
else
{
simpleSelector.Class = token.Substring(index);
index = token.Length;
}
}
else if (token[index].Equals('[')) // attribute
{
System.Diagnostics.Debug.Assert(false);
}
else if (token[index].Equals(':')) // pseudo-x
{
index += 1;
if (index >= token.Length)
{
throw new ParseExeception();
}
int nextIndex = token.IndexOfAny("#.:[".ToCharArray(), index);
if (nextIndex != -1)
{
simpleSelector.Pseudo = token.Substring(index, nextIndex - index);
index = nextIndex;
}
else
{
simpleSelector.Pseudo = token.Substring(index);
index = token.Length;
}
}
else // element name
{
int nextIndex = token.IndexOfAny("#.[:".ToCharArray(), index);
if (nextIndex != -1)
{
simpleSelector.ElementNames = token.Substring(index, nextIndex - index);
index = nextIndex;
}
else
{
simpleSelector.ElementNames = token.Substring(index);
index = token.Length;
}
}
}
selector.Add(simpleSelector);
combinatorExist = false;
}
}
return(selector);
}
