/// <summary>
/// desrialized rule list. ImportRule is at the beginning of file, and should be ignored.
/// </summary>
/// <param name="cssText"></param>
/// <param name="basehref">the base href for import rule. </param>
/// <returns></returns>
public static CSSRuleList deserializeRuleList(string cssText, string basehref)
{
CSSRuleList rules = new CSSRuleList();
CSSFileScanner filescanner = new CSSFileScanner(cssText);
CSSFileScannerResult result = filescanner.ReadNext();
while (result != null)
{
if (result.type == enumCSSRuleType.STYLE_RULE)
{
CSSStyleRule stylerule = deserializeCSSStyleRule(result.cssText);
if (stylerule != null)
{
rules.appendRule(stylerule);
}
}
else if (result.type == enumCSSRuleType.IMPORT_RULE)
{
CSSImportRule importrule = deserializeCSSImportRule(result.cssText, basehref);
if (importrule != null)
{
rules.appendRule(importrule);
}
}
else if (result.type == enumCSSRuleType.MEDIA_RULE)
{
CSSMediaRule mediarule = deserializeCSSMediaRule(result.cssText);
if (mediarule != null)
{
rules.appendRule(mediarule);
}
}
else
{
//TODO: other rules are not implemented now.
}
result = filescanner.ReadNext();
}
return(rules);
}
/// <summary>
/// read the next rule declaration
/// </summary>
/// <returns></returns>
public CSSFileScannerResult ReadNext()
{
int lastread = _currentRead;
for (int i = lastread; i < _length; i++)
{
// check comment, skip till the */
if (_cssText[i] == 47 && _cssText[i + 1] == 42)
{
int endComment = _cssText.IndexOf("*/", i);
i = endComment + 1; // to be checked.
continue;
}
else
{
//if null, space or another char that should be ignored, ignore them
if (isEscapeChar(_cssText[i]))
{
continue;
}
if (isAtRule(_cssText[i]))
{
int endposition = 0;
string ruletext = getAtRuleText(i, ref endposition);
if (!string.IsNullOrEmpty(ruletext) && endposition > 0)
{
i = endposition;
_currentRead = endposition + 1; // to be checked + 1 or not.
enumCSSRuleType type = getAtRuleType(ruletext);
if (type == enumCSSRuleType.reserved)
{
continue;
}
else
{
CSSFileScannerResult result = new CSSFileScannerResult();
result.type = type;
result.cssText = ruletext;
return(result);
}
}
else
{
continue;
}
}
else
{
if (isValidIndent(_cssText[i]))
{
int endMark = 0;
string ruletext = getNextBlock(i, ref endMark);
if (!string.IsNullOrEmpty(ruletext) && endMark > 0)
{
CSSFileScannerResult result = new CSSFileScannerResult();
result.type = enumCSSRuleType.STYLE_RULE;
result.cssText = ruletext;
_currentRead = endMark + 1;
return(result);
}
}
else
{
/// nothing match, can not escape, can not read. should throw exception
continue;
}
}
}
}
return(null);
}