/// <summary>
/// Adds a diagnostic indicating that an easing function is unrecognized
/// to the specified collection of diagnostics.
/// </summary>
/// <param name="collection">The collection to which to add the diagnostic.</param>
/// <param name="node">The syntax node which is associated with the diagnostic.</param>
internal static void ReportUnrecognizedEasingFunction(ref ICollection <DiagnosticInfo> collection,
UvssIdentifierBaseSyntax node)
{
Contract.Require(node, nameof(node));
var span = new TextSpan(0, node.Width);
var diagnostic = new DiagnosticInfo(node, DiagnosticID.UnrecognizedEasingFunction,
DiagnosticSeverity.Error, span, $"Unrecognized easing function '{node.Text}'");
Report(ref collection, diagnostic);
}
/// <summary>
/// Adds a diagnostic indicating that a loop type is unrecognized
/// to the specified collection of diagnostics.
/// </summary>
/// <param name="collection">The collection to which to add the diagnostic.</param>
/// <param name="node">The syntax node which is associated with the diagnostic.</param>
internal static void ReportUnrecognizedLoopType(ref ICollection <DiagnosticInfo> collection,
UvssIdentifierBaseSyntax node)
{
Contract.Require(node, nameof(node));
var span = new TextSpan(0, node.Width);
var diagnostic = new DiagnosticInfo(node, DiagnosticID.UnrecognizedLoopType,
DiagnosticSeverity.Error, span, $"Unrecognized loop type '{node.Text}' (should be 'none' or 'loop' or 'reverse')");
Report(ref collection, diagnostic);
}
/// <summary>
/// Parses the value of the specified optional identifier into a <see cref="LoopBehavior"/>
/// value, if the identifier exists.
/// </summary>
private static LoopBehavior ParseOptionalLoopBehavior(UvssIdentifierBaseSyntax identifier)
{
if (identifier == null)
{
return(LoopBehavior.None);
}
var text = identifier.Text;
switch (text)
{
case KnownLoopBehaviors.None:
return(LoopBehavior.None);
case KnownLoopBehaviors.Loop:
return(LoopBehavior.Loop);
case KnownLoopBehaviors.Reverse:
return(LoopBehavior.Reverse);
default:
throw new UvssException(PresentationStrings.StyleSheetParserError);
}
}