/// <summary>
/// Initializes a new instance of the <see cref="UvssSelectorPart"/> class.
/// </summary>
/// <param name="qualifier">The qualifier value for this selector part, if it has one.</param>
/// <param name="element">The name of the element type that matches this selector part.</param>
/// <param name="elementIsExact">A value indicating whether the element type that matches this
/// selector part must be an exact match.</param>
/// <param name="id">The identifier of the element that matches this selector part.</param>
/// <param name="pseudoClass">The selector part's pseudo-class, if any.</param>
/// <param name="classes">The list of classes which match this selector part.</param>
internal UvssSelectorPart(UvssSelectorPartQualifier qualifier, String element, Boolean elementIsExact,
String id, String pseudoClass, IEnumerable<String> classes)
{
var rawID = (id != null && id.StartsWith("#")) ? id.Substring(1) : id;
var rawPseudoClass = (pseudoClass != null && pseudoClass.StartsWith(":")) ? pseudoClass.Substring(1) : pseudoClass;
var rawClassNames = from c in classes select c.StartsWith(".") ? c.Substring(1) : c;
this.qualifier = qualifier;
this.element = element;
this.elementIsExact = elementIsExact;
this.id = rawID;
this.pseudoClass = rawPseudoClass;
this.classes = new UvssClassCollection(rawClassNames);
this.priority = CalculatePriority();
}
/// <summary>
/// Initializes a new instance of the <see cref="UvssSelectorPart"/> class.
/// </summary>
/// <param name="qualifier">The qualifier value for this selector part, if it has one.</param>
/// <param name="type">The name of the element type that matches this selector part.</param>
/// <param name="typeIsExact">A value indicating whether the element type that matches this
/// selector part must be an exact match.</param>
/// <param name="name">The name of the element that matches this selector part.</param>
/// <param name="pseudoClass">The selector part's pseudo-class, if any.</param>
/// <param name="classes">The list of classes which match this selector part.</param>
internal UvssSelectorPart(UvssSelectorPartQualifier qualifier, String type, Boolean typeIsExact,
String name, String pseudoClass, IEnumerable<String> classes)
{
var rawName = (name != null && name.StartsWith("#")) ? name.Substring(1) : name;
var rawPseudoClass = (pseudoClass != null && pseudoClass.StartsWith(":")) ? pseudoClass.Substring(1) : pseudoClass;
var rawClassNames = from c in classes select c.StartsWith(".") ? c.Substring(1) : c;
this.qualifier = qualifier;
this.type = type;
this.typeIsExact = typeIsExact;
this.name = rawName;
this.pseudoClass = rawPseudoClass;
this.classes = new UvssClassCollection(rawClassNames);
this.priority = CalculatePriority();
}
/// <summary>
/// Initializes a new instance of the <see cref="UvssSelectorPart"/> class.
/// </summary>
/// <param name="qualifier">The qualifier value for this selector part, if it has one.</param>
/// <param name="type">The name of the element type that matches this selector part.</param>
/// <param name="typeIsExact">A value indicating whether the element type that matches this
/// selector part must be an exact match.</param>
/// <param name="name">The name of the element that matches this selector part.</param>
/// <param name="pseudoClass">The selector part's pseudo-class, if any.</param>
/// <param name="classes">The list of classes which match this selector part.</param>
internal UvssSelectorPart(UvssSelectorPartQualifier qualifier, String type, Boolean typeIsExact,
String name, String pseudoClass, IEnumerable <String> classes)
{
var rawName = (name != null && name.StartsWith("#")) ? name.Substring(1) : name;
var rawPseudoClass = (pseudoClass != null && pseudoClass.StartsWith(":")) ? pseudoClass.Substring(1) : pseudoClass;
var rawClassNames = from c in classes select c.StartsWith(".") ? c.Substring(1) : c;
this.qualifier = qualifier;
this.type = type;
this.typeIsExact = typeIsExact;
this.name = rawName;
this.pseudoClass = rawPseudoClass;
this.classes = new UvssClassCollection(rawClassNames);
this.priority = CalculatePriority();
}
/// <summary>
/// Compiles a <see cref="UvssSelectorPart"/> from the specified syntax node.
/// </summary>
private static UvssSelectorPart CompileSelectorPart(UvssSelectorPartSyntax node, UvssSelectorPartQualifier qualifier)
{
var element =
node.SelectedType?.SelectedTypeIdentifier?.Text;
if (element == "*")
{
element = null;
}
var elementIsExact =
node.SelectedType?.ExclamationMarkToken != null;
var id =
node.SelectedName?.SelectedNameIdentifier?.Text;
var pseudoClass =
node.PseudoClass?.ClassNameIdentifier?.Text;
var classes = new List <String>();
for (int i = 0; i < node.SelectedClasses.Count; i++)
{
var selectedClass = node.SelectedClasses[i];
classes.Add(selectedClass.SelectedClassIdentifier.Text);
}
return(new UvssSelectorPart(qualifier,
element,
elementIsExact,
id,
pseudoClass,
classes));
}
/// <summary>
/// Gets a value indicating whether the specified UI element has an ancestor that matches the specified selector part.
/// </summary>
/// <param name="element">The UI element to evaluate. If a match is found, this variable will be updated to contain the matching element.</param>
/// <param name="part">The selector part to evaluate.</param>
/// <param name="root">The topmost root element to consider when tracing ancestors.</param>
/// <param name="qualifier">A qualifier which specifies the relationship between the element and its ancestor.</param>
/// <returns><see langword="true"/> if the element matches the selector part; otherwise, <see langword="false"/>.</returns>
private static Boolean AncestorMatchesSelectorPart(ref UIElement element, UvssSelectorPart part, UIElement root, UvssSelectorPartQualifier qualifier)
{
if (qualifier == UvssSelectorPartQualifier.TemplatedChild)
{
var fe = element as FrameworkElement;
if (fe != null && fe.TemplatedParent != null)
{
var feTemplatedParent = (UIElement)fe.TemplatedParent;
if (ElementMatchesSelectorPart(feTemplatedParent, feTemplatedParent, part))
{
element = feTemplatedParent;
return(true);
}
}
return(false);
}
else
{
var current = element;
while (true)
{
if (current == root)
{
return(false);
}
current = ((qualifier == UvssSelectorPartQualifier.LogicalChild) ? LogicalTreeHelper.GetParent(current) : VisualTreeHelper.GetParent(current)) as UIElement;
if (current == null)
{
break;
}
if (ElementMatchesSelectorPart(root, current, part))
{
element = current;
return(true);
}
if (qualifier != UvssSelectorPartQualifier.None)
{
break;
}
}
return(false);
}
}
