/////////////////////////////////////////////////////////////////////////////////
#region 解析 Token
/////////////////////////////////////////////////////////////////////////////////
/// <summary>
///
/// </summary>
protected void ResolveTokens()
{
System.Diagnostics.Debug.Assert(m_result != null);
int visitor = 0;
List <DCssSelector> selectorList = new List <DCssSelector>();
while (visitor < m_tokens.Count)
{
StyleSheetToken token = m_tokens[visitor];
//=====================================================================================//
if (token.Type == StyleSheetToken.TokenType.Selector)
{
selectorList.Add(ResolveSelector(m_tokens[visitor].Content));
++visitor;
}
//=====================================================================================//
else if (token.Type == StyleSheetToken.TokenType.PropertyList)
{
System.Diagnostics.Debug.Assert(selectorList.Count > 0);
DCssSelector selector = selectorList[0];
ResolvePropertyList(m_tokens[visitor].Content, selector.Properties);
++visitor;
for (int index = 1; index < selectorList.Count; ++index)
{
DCssSelector cloneSelector = selectorList[index];
int propertyCount = selector.Properties.Count;
for (int propertyIndex = 0; propertyIndex < propertyCount; ++propertyIndex)
{
cloneSelector.Properties.AddLast((DCssProperty)selector.Properties[propertyIndex].Clone());
}
}
m_result.AddRange(selectorList);
selectorList.Clear();
}
else
{
System.Diagnostics.Debug.Assert(false);
}
}
m_tokens.Clear();
}
/////////////////////////////////////////////////////////////////////////////////
/// <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);
}
