/// <summary>
/// Returns a minified version of a given CSS.
/// </summary>
/// <param name="resource">CSS to be minified</param>
/// <returns>Minified CSS</returns>
public string Minify(string resource)
{
if (String.IsNullOrEmpty(resource))
{
return resource;
}
// Reset error
minificationError = null;
try
{
CssParser parser = new CssParser();
parser.CssError += parser_CssError;
// Parse the resource
string parsed = parser.Parse(resource);
if (!String.IsNullOrEmpty(parsed) && (minificationError == null))
{
resource = parsed;
}
}
catch (CssException ex)
{
minificationError = ex;
}
if (minificationError != null)
{
if (LogMinifierParseError)
{
// Log exception to event log if allowed
EventLogProvider.LogException("CSS Compression", "MINIFYCSS", minificationError);
}
// Add error info in front of non-minified resource
resource += "\r\n\r\n/* Minification failed (line " + minificationError.Line.ToString() + "): " + minificationError.Message + " */";
}
return resource;
}
internal CssErrorEventArgs(CssException exc, ContextError error)
{
Error = error;
Exception = exc;
}
protected void OnCssError(CssException exception)
{
if (CssError != null && exception != null)
{
CssError(this, new CssErrorEventArgs(exception,
new ContextError(
exception.Severity < 2,
exception.Severity,
GetSeverityString(exception.Severity),
string.Format(CultureInfo.InvariantCulture, "CSS{0}", (exception.Error & (0xffff))),
exception.HelpLink,
FileContext,
exception.Line,
exception.Char,
0,
0,
exception.Message)));
}
}
/// <summary>
/// Returns a minified version of a given CSS.
/// </summary>
/// <param name="resource">CSS to be minified</param>
/// <returns>Minified CSS</returns>
public string Minify(string resource)
{
if (String.IsNullOrEmpty(resource))
{
return resource;
}
// Reset error
minificationError = null;
try
{
CssParser parser = new CssParser();
// Ignore error: 'An underscore is not a valid CSS1 or CSS2 identifier character'
parser.Settings.IgnoreErrorList = "CSS1008";
parser.Settings.AllowEmbeddedAspNetBlocks = true;
parser.CssError += parser_CssError;
// Parse the resource
string parsed = parser.Parse(resource);
if (!String.IsNullOrEmpty(parsed) && (minificationError == null))
{
resource = parsed;
}
}
catch (CssException ex)
{
minificationError = ex;
}
if (minificationError != null)
{
if (LogMinifierParseError)
{
// Log exception to event log if allowed
EventLogProvider.LogException("CSS Compression", "MINIFYCSS", minificationError);
}
// Add the error info to the end of non-minified resource
resource += string.Format("\r\n\r\n/* Minification failed (line {0}, error number {1}): {2} */", minificationError.Line, minificationError.Error, minificationError.Message);
}
return resource;
}
/// <summary>
/// Parsing error occured - event handler.
/// </summary>
private void parser_CssError(object sender, CssErrorEventArgs e)
{
// Do not minify in the case of parse exception and log the error
minificationError = e.Exception;
}
protected void OnCssError(CssException exception)
{
if (CssError != null && exception != null && !Settings.IgnoreAllErrors)
{
// format our CSS error code
string errorCode = "CSS{0}".FormatInvariant((exception.Error & (0xffff)));
// if we have no errors in our error ignore list, or if we do but this error code is not in
// that list, fire the event to whomever is listening for it.
if (!Settings.IgnoreErrorCollection.Contains(errorCode))
{
CssError(this, new CssErrorEventArgs(exception,
new ContextError(
exception.Severity < 2,
exception.Severity,
GetSeverityString(exception.Severity),
errorCode,
exception.HelpLink,
FileContext,
exception.Line,
exception.Char,
0,
0,
exception.Message)));
}
}
}
