public static string serializeCSSStyleRule(CSSStyleRule Rule)
{
string returnstring = string.Empty;
returnstring += "\r\n" + Rule.selectorText + "\r\n";
returnstring += "{\r\n";
returnstring += Rule.style.cssText;
returnstring += "\r\n}\r\n";
return(returnstring);
}
/// <summary>
/// update or insert a new CSSStyleRule.
/// </summary>
/// <param name="newRule"></param>
private void updateStyleRule(CSSStyleRule newRule, bool updateCssText)
{
string selectorText = newRule.selectorText.ToLower();
// search to update exsiting records
for (int i = 0; i < cssRules.length; i++)
{
if (cssRules.item[i].type == newRule.type)
{
CSSStyleRule existingRule = (CSSStyleRule)cssRules.item[i];
if (existingRule.selectorText.ToLower() == selectorText)
{
existingRule.style.merge(newRule.style);
if (updateCssText)
{
// after merge, we need to update the cssText
int startSearchingPosition = _cssText.IndexOf(existingRule.selectorText);
// this must have value, otherwise, there is an error parsing.
if (startSearchingPosition > 0)
{
int firstBracket = _cssText.IndexOf("{", startSearchingPosition);
int secondBracket = _cssText.IndexOf("}", firstBracket);
string firstString = _cssText.Substring(0, firstBracket + 1);
string secondString = _cssText.Substring(secondBracket);
_cssText = firstString + existingRule.cssText + secondString;
}
else
{
//TODO: error check.
}
}
}
}
}
// not found existing, insert a new one.
cssRules.insertRule(newRule, -1);
if (updateCssText)
{
/// append the text to the end of csstext.
_cssText = _cssText + CSS.CSSSerializer.serializeCSSStyleRule(newRule);
}
}
/// <summary>
/// apply css rules to current document.
/// </summary>
/// <param name="dom"></param>
/// <param name="rulelist"></param>
/// <param name="mediadeviceInfo"></param>
public void ApplyCssRules(CSS.CSSRuleList rulelist, string mediadeviceInfo)
{
if (rulelist == null)
{
return;
}
foreach (var item in rulelist.item)
{
if (item.type == CSS.enumCSSRuleType.STYLE_RULE)
{
CSS.CSSStyleRule stylerule = item as CSS.CSSStyleRule;
foreach (var elemntitem in this.Select(stylerule.selectorText).item)
{
elemntitem.StyleRules.Add(stylerule);
}
}
else if (item.type == CSS.enumCSSRuleType.MEDIA_RULE)
{
CSS.CSSMediaRule mediarule = item as CSS.CSSMediaRule;
if (string.IsNullOrEmpty(mediadeviceInfo))
{
ApplyCssRules(mediarule.cssRules, string.Empty);
}
else
{
if (MediaQuery.isMatch(mediarule.media, mediadeviceInfo))
{
ApplyCssRules(mediarule.cssRules, string.Empty);
}
}
}
else if (item.type == enumCSSRuleType.IMPORT_RULE)
{
CSS.CSSImportRule importrule = item as CSS.CSSImportRule;
if (importrule.stylesheet != null && importrule.stylesheet.cssRules != null)
{
if (MediaQuery.isMatch(importrule.media, mediadeviceInfo))
{
ApplyCssRules(importrule.stylesheet.cssRules, mediadeviceInfo);
}
}
}
}
}
/// <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>
/// deserialize a CSSstyle rule.
/// Example
/// h1, h2
/// {
/// font-color:green;
/// }
/// </summary>
/// <param name="cssText"></param>
/// <returns></returns>
public static CSSStyleRule deserializeCSSStyleRule(string cssText)
{
int firstBracket = cssText.IndexOf("{");
int nextBracket = cssText.IndexOf("}");
if (firstBracket <= 0 && nextBracket <= 0 && firstBracket > nextBracket)
{
// failed, did not find it.
return(null);
}
string selector = cssText.Substring(0, firstBracket).Trim();
if (string.IsNullOrEmpty(selector))
{
return(null);
}
string innerCssText = cssText.Substring(firstBracket + 1, nextBracket - firstBracket - 1);
CSSStyleDeclaration declartaion = deserializeDeclarationBlock(innerCssText);
if (declartaion.item.Count == 0)
{
return(null);
}
CSSStyleRule rule = new CSSStyleRule();
rule.selectorText = selector;
rule.cssText = innerCssText;
rule.style = declartaion;
return(rule);
}
/// <summary>
/// This append rule does not cause an update of csstext property.
/// </summary>
/// <param name="rule"></param>
public void appendStyleRule(CSSStyleRule rule)
{
updateStyleRule(rule, false);
}
