/// <summary> /// Parses a <see cref="Selector"/> from a string. /// </summary> /// <param name="s">The string.</param> /// <returns>The parsed selector.</returns> public Selector Parse(string s) { var syntax = SelectorGrammar.Selector.Parse(s); var result = new Selector(); foreach (var i in syntax) { var ofType = i as SelectorGrammar.OfTypeSyntax; var @class = i as SelectorGrammar.ClassSyntax; var name = i as SelectorGrammar.NameSyntax; var property = i as SelectorGrammar.PropertySyntax; var child = i as SelectorGrammar.ChildSyntax; var descendent = i as SelectorGrammar.DescendentSyntax; var template = i as SelectorGrammar.TemplateSyntax; if (ofType != null) { result = result.OfType(_typeResolver(ofType.TypeName, ofType.Xmlns)); } else if (@class != null) { result = result.Class(@class.Class); } else if (name != null) { result = result.Name(name.Name); } else if (property != null) { throw new NotImplementedException(); } else if (child != null) { result = result.Child(); } else if (descendent != null) { result = result.Descendent(); } else if (template != null) { result = result.Template(); } } return result; }
/// <summary> /// Returns a selector which matches a type. /// </summary> /// <typeparam name="T">The type.</typeparam> /// <param name="previous">The previous selector.</param> /// <returns>The selector.</returns> public static Selector OfType <T>(this Selector previous) where T : IStyleable { return(previous.OfType(typeof(T))); }
/// <summary> /// Parses a <see cref="Selector"/> from a string. /// </summary> /// <param name="s">The string.</param> /// <returns>The parsed selector.</returns> public Selector Parse(string s) { var syntax = SelectorGrammar.Selector.Parse(s); var result = new Selector(); foreach (var i in syntax) { var ofType = i as SelectorGrammar.OfTypeSyntax; var @is = i as SelectorGrammar.IsSyntax; var @class = i as SelectorGrammar.ClassSyntax; var name = i as SelectorGrammar.NameSyntax; var property = i as SelectorGrammar.PropertySyntax; var child = i as SelectorGrammar.ChildSyntax; var descendent = i as SelectorGrammar.DescendentSyntax; var template = i as SelectorGrammar.TemplateSyntax; if (ofType != null) { result = result.OfType(_typeResolver(ofType.TypeName, ofType.Xmlns)); } if (@is != null) { result = result.Is(_typeResolver(@is.TypeName, @is.Xmlns)); } else if (@class != null) { result = result.Class(@class.Class); } else if (name != null) { result = result.Name(name.Name); } else if (property != null) { var type = result.TargetType; if (type == null) { throw new InvalidOperationException("Property selectors must be applied to a type."); } var targetProperty = PerspexPropertyRegistry.Instance.FindRegistered(type, property.Property); if (targetProperty == null) { throw new InvalidOperationException($"Cannot find '{property.Property}' on '{type}"); } object typedValue; if (TypeUtilities.TryConvert( targetProperty.PropertyType, property.Value, CultureInfo.InvariantCulture, out typedValue)) { result = result.PropertyEquals(targetProperty, typedValue); } else { throw new InvalidOperationException( $"Could not convert '{property.Value}' to '{targetProperty.PropertyType}"); } } else if (child != null) { result = result.Child(); } else if (descendent != null) { result = result.Descendent(); } else if (template != null) { result = result.Template(); } } return result; }