private static void ProcessCss(TemplateControl rootControl, string strRawCss)
{
// has this template been processed before?
string strControlType = rootControl.GetType().FullName;
bool bIsNewStyleSet = false;
Dictionary hash_xidsToCssClasses = (Dictionary)_hash_processedCss[strControlType] ?? null;
if (hash_xidsToCssClasses == null)
{
hash_xidsToCssClasses = new Dictionary();
bIsNewStyleSet = true;
}
//////
// rewrite css rules if this is the first time loading this control.
if (bIsNewStyleSet)
{
string strProcessedCss = strRawCss;
// rerewrite element id references
strProcessedCss = strProcessedCss.ReplaceRegex(
new RegularExpression(@"#[a-zA-Z]\w*", "g"),
delegate(string s)
{
string sSub = s.Substr(1);
// if #this
if (sSub == "this")
{
hash_xidsToCssClasses[sSub] = (string)hash_xidsToCssClasses[sSub] ?? GenerateNewAutoCssClass();
#if DEBUG
return "." + (string)hash_xidsToCssClasses[sSub] + "/* " + s + " */";
#else
return "." + (string)hash_xidsToCssClasses[sSub];
#endif
}
// if #someLocalId (element)
jQueryObject jqElement = (jQueryObject)rootControl._hash_oNamedChildElements[sSub] ?? null;
if (jqElement != null)
{
hash_xidsToCssClasses[sSub] = (string)hash_xidsToCssClasses[sSub] ?? GenerateNewAutoCssClass();
#if DEBUG
return "." + (string)hash_xidsToCssClasses[sSub] + "/* " + s + " */";
#else
return "." + (string)hash_xidsToCssClasses[sSub];
#endif
}
// if #someLocalId (control)
TemplateControl oControl = (TemplateControl)rootControl._hash_oNamedChildControls[sSub] ?? null;
if (oControl != null)
{
hash_xidsToCssClasses[sSub] = (string)hash_xidsToCssClasses[sSub] ?? GenerateNewAutoCssClass();
#if DEBUG
return "." + (string)hash_xidsToCssClasses[sSub] + "/* " + s + " */";
#else
return "." + (string)hash_xidsToCssClasses[sSub];
#endif
}
// unknown. keep.
return s;
}
);
// rewrite url paths
bool isIE = jQuery.Browser.MSIE;
string cssBaseUrl = BaseUrlImages;
if (cssBaseUrl.Length > 0 || isIE)
{
RegularExpression rxUrl = new RegularExpression(@"url\w*\((.*)\)", "i");
Func<string, bool> fnIsAbsolute = delegate(string url)
{
return url.StartsWith("http://") || url.StartsWith("https://");
};
string currentProtocolDomain;
{
Location loc = Window.Location;
currentProtocolDomain
= loc.Protocol
+ "//"
+ loc.HostnameAndPort
+ "/"
;
}
strProcessedCss = strProcessedCss.ReplaceRegex(
new RegularExpression(@":\w*url\w*\(""?.*""?\)", "ig"),
delegate(string s)
{
string[] matches = rxUrl.Exec(s);
Debug.Assert(matches.Length == 2);
string url = matches[1];
if (fnIsAbsolute(url))
{
// already absolute. no change needed.
return s;
}
// prepend base url
url = CombinePaths(cssBaseUrl, url);
if (isIE && !fnIsAbsolute(url))
{
// rewrite url()'s to be absolute (workaround for IE7/8/9 bug with relative paths in dynamically added css in iframes).
url = CombinePaths(currentProtocolDomain, url);
}
return string.Format(@":url(""{0}"")", url);
}
);
}
_processedCss = _processedCss + " " + strProcessedCss;
// update global style
jQueryObject jqHead = jQuery.Select("head");
jQueryObject jqStyle;
if (jQuery.Browser.MSIE)
{
// if IE, we need to concat all style rules (otherwise hit a max css node limit in ie)
// is there an existing global css node?
jqStyle = jQuery.Select("#" + CssGlobalNodeId);
Number ieVersion = Number.ParseDouble(jQuery.Browser.Version);
// setting inner html does not work on IE8. so we do a string concat here instead.
if (Number.IsFinite(ieVersion) && ieVersion <= 8)
{
// remove existing global style node if exists.
if (jqStyle.Length != 0)
{
jqStyle.Remove();
}
// build new global style node.
jqStyle = jQuery.FromHtml(@"<style type=""text/css"">" + _processedCss + @"</style>");
jqStyle.Attribute("id", CssGlobalNodeId);
jqHead.Append(jqStyle);
}
else
{
// create new global style node if missing.
if (jqStyle.Length == 0)
{
jqStyle = jQuery.FromHtml(@"<style type=""text/css""></style>");
jqStyle.Attribute("id", CssGlobalNodeId);
jqHead.Append(jqStyle);
}
// modify global style node.
jqStyle.Text(_processedCss);
}
}
else
{
// in non-ie, just append another css node.
jqStyle = jQuery.FromHtml(@"<style type=""text/css""></style>");
jqStyle.Html(strProcessedCss);
jqHead.Append(jqStyle);
}
// save rewrite rules
_hash_processedCss[strControlType] = hash_xidsToCssClasses;
}
//////
// apply classes to named elements
foreach (DictionaryEntry kvp in hash_xidsToCssClasses)
{
string key = kvp.Key;
if (key == "this")
{
rootControl._jqRootElement.AddClass((string)kvp.Value);
continue;
}
// is it an element?
jQueryObject jqElement = (jQueryObject)rootControl._hash_oNamedChildElements[key] ?? null;
if (jqElement != null)
{
jqElement.AddClass((string)kvp.Value);
continue;
}
// is it a control?
TemplateControl oControl = (TemplateControl)rootControl._hash_oNamedChildControls[key] ?? null;
if (oControl != null)
{
oControl.RootElement.AddClass((string)kvp.Value);
continue;
}
#if DEBUG
throw new Exception("CSS rule found for no corresponding element/control.");
#endif
}
}
/// <summary>
/// For the given template control, retrieve its html template.
/// </summary>
/// <param name="templateControl"></param>
/// <returns></returns>
private static string FindTemplate(TemplateControl templateControl)
{
string templateTypeName = templateControl.GetType().FullName;
if (!_hash_templateCache.ContainsKey(templateTypeName))
{
string strTemplate = (string)Type.GetField(templateControl, "template");
if (!string.IsNullOrEmpty(strTemplate))
{
_hash_templateCache[templateTypeName] = strTemplate;
}
else
{
// search for a private/obfuscated field
foreach (DictionaryEntry kvp in Dictionary.GetDictionary(templateControl))
{
if (!(kvp.Value is string))
{
continue;
}
if (!kvp.Key.StartsWith("$"))
{
continue;
}
string strTmp = ((string)kvp.Value).Trim(); // todo: avoid a trim.
if (strTmp.StartsWith("<"))
{
_hash_templateCache[templateTypeName] = kvp.Value;
}
}
}
}
return (string)(_hash_templateCache[templateTypeName] ?? null);
}