/// <summary>Normalizes the declaration URIs.</summary>
/// <param name="declarations">the declarations</param>
private void NormalizeDeclarationURIs(IList <CssDeclaration> declarations)
{
// This is the case when css has no location and thus urls should not be resolved against base css location
if (this.uriResolver == null)
{
return;
}
foreach (CssDeclaration declaration in declarations)
{
if (declaration.GetExpression().Contains("url("))
{
CssDeclarationValueTokenizer tokenizer = new CssDeclarationValueTokenizer(declaration.GetExpression());
CssDeclarationValueTokenizer.Token token;
StringBuilder normalizedDeclaration = new StringBuilder();
while ((token = tokenizer.GetNextValidToken()) != null)
{
String strToAppend;
if (token.GetType() == CssDeclarationValueTokenizer.TokenType.FUNCTION && token.GetValue().StartsWith("url("
))
{
String url = token.GetValue().Trim();
url = url.JSubstring(4, url.Length - 1).Trim();
if (CssUtils.IsBase64Data(url))
{
strToAppend = token.GetValue().Trim();
}
else
{
if (url.StartsWith("'") && url.EndsWith("'") || url.StartsWith("\"") && url.EndsWith("\""))
{
url = url.JSubstring(1, url.Length - 1);
}
url = url.Trim();
String finalUrl = url;
try {
finalUrl = uriResolver.ResolveAgainstBaseUri(url).ToExternalForm();
}
catch (UriFormatException) {
}
strToAppend = MessageFormatUtil.Format("url({0})", finalUrl);
}
}
else
{
strToAppend = token.GetValue();
}
if (normalizedDeclaration.Length > 0)
{
normalizedDeclaration.Append(' ');
}
normalizedDeclaration.Append(strToAppend);
}
declaration.SetExpression(normalizedDeclaration.ToString());
}
}
}
