// Private Utilities
static void GetInlineStyleSheetAndRule(VisualTreeAsset vta, VisualElement element, out StyleSheet styleSheet, out StyleRule styleRule)
{
var vea = element.GetVisualElementAsset();
styleSheet = vta.GetOrCreateInlineStyleSheet();
styleRule = vta.GetOrCreateInlineStyleRule(vea);
}
public static StyleRule GetOrCreateInlineStyleRule(this VisualTreeAsset vta, VisualElementAsset vea, out bool wasCreated)
{
wasCreated = vea.ruleIndex < 0;
if (wasCreated)
{
var inlineSheet = vta.GetOrCreateInlineStyleSheet();
vea.ruleIndex = inlineSheet.AddRule();
}
return(vta.inlineSheet.GetRule(vea.ruleIndex));
}