/// <summary>
/// Retrieves or creates the merged style dictionary of an element.
/// </summary>
/// <param name="styledElement">A styled element.</param>
/// <returns>The merged dictionary of the element.</returns>
private static BaseMergedStyleDictionary GetMergedStyleDictionary(FrameworkElement styledElement)
{
Debug.Assert(styledElement != null, "styledElement cannot be null.");
IList <FrameworkElement> ancestorsInclusive = styledElement.GetVisualAncestors().Append(styledElement).Reverse().ToList();
IEnumerable <FrameworkElement> ancestorsTopToBottom = ancestorsInclusive;
BaseMergedStyleDictionary initialDictionary = null;
if (UseApplicationResources)
{
initialDictionary = new MergedStyleResourceDictionary(ApplicationExternalResourceDictionary ?? Application.Current.Resources);
}
else
{
FrameworkElement topLevelElement = ancestorsInclusive[0];
initialDictionary = new MergedStyleResourceDictionary(ImplicitStyleManager.GetExternalResourceDictionary(topLevelElement) ?? topLevelElement.Resources);
ancestorsTopToBottom = ancestorsInclusive.Skip(1);
}
BaseMergedStyleDictionary styleDictionary =
ancestorsTopToBottom.Aggregate(
initialDictionary,
(dictionary, ancestor) => new MergedStyleResourceDictionary(ImplicitStyleManager.GetExternalResourceDictionary(ancestor) ?? ancestor.Resources)
{
Parent = dictionary
});
return(styleDictionary);
}
/// <summary>
/// Retrieves or creates the merged style dictionary of an element.
/// </summary>
/// <param name="styledElement">A styled element.</param>
/// <returns>The merged dictionary of the element.</returns>
private static BaseMergedStyleDictionary GetMergedStyleDictionary(FrameworkElement styledElement)
{
Debug.Assert(styledElement != null, "styledElement cannot be null.");
IList<FrameworkElement> ancestorsInclusive = styledElement.GetVisualAncestors().Append(styledElement).Reverse().ToList();
IEnumerable<FrameworkElement> ancestorsTopToBottom = ancestorsInclusive;
BaseMergedStyleDictionary initialDictionary = null;
if (UseApplicationResources)
{
initialDictionary = new MergedStyleResourceDictionary(ApplicationExternalResourceDictionary ?? Application.Current.Resources);
}
else
{
FrameworkElement topLevelElement = ancestorsInclusive[0];
initialDictionary = new MergedStyleResourceDictionary(ImplicitStyleManager.GetExternalResourceDictionary(topLevelElement) ?? topLevelElement.Resources);
ancestorsTopToBottom = ancestorsInclusive.Skip(1);
}
BaseMergedStyleDictionary styleDictionary =
ancestorsTopToBottom.Aggregate(
initialDictionary,
(dictionary, ancestor) => new MergedStyleResourceDictionary(ImplicitStyleManager.GetExternalResourceDictionary(ancestor) ?? ancestor.Resources) { Parent = dictionary });
return styleDictionary;
}
