public static IRule AddCssStringSelector(this ICollection <IRule> rules, string selectorName)
{
if (string.IsNullOrWhiteSpace(selectorName))
{
throw new ArgumentNullException(nameof(selectorName));
}
Rule?rule = new()
{
Selector = new CssStringSelector {
SelectorName = selectorName
},
Properties = new CssString(),
};
rules.Add(rule);
return(rule);
}
public static CssString AppendCssStyles(this CssString cssString, params string[] cssStyles)
{
if (!cssStyles.Any())
{
return(cssString);
}
int totalCharLength = cssStyles.Select(x => x.Length).Sum() + cssStyles.Length;
// Use string.Create and Spans to highly optimize the string concatenation (no allocations)
string?combinedString = string.Create(totalCharLength, cssStyles, (chars, state) =>
{
int position = 0;
foreach (string?cssString in state)
{
cssString.AsSpan().CopyTo(chars[position..]);
position += cssString.Length;
chars[position++] = ';'; // Append a semi-colon after each fragment
}
public static CssString SetCssStyles(this CssString cssString, params string[] cssStyles)
{
if (!cssStyles.Any())
{
return(cssString);
}
var totalCharLength = cssStyles.Select(x => x.Length).Sum() + cssStyles.Count();
// Use string.Create and Spans to highly optimize the string concatenation (no allocations)
var combinedString = string.Create(totalCharLength, cssStyles, (chars, state) =>
{
var position = 0;
foreach (var cssString in state)
{
cssString.AsSpan().CopyTo(chars.Slice(position));
position += cssString.Length;
chars[position++] = ';'; // Append a semi-colon after each fragment
}
});
cssString.Css = combinedString;
return(cssString);
}