protected void ReplaceAll(IStylesheetNode node)
{
ClearChildren();
StylesheetText = node.StylesheetText;
foreach (var child in node.Children)
{
AppendChild(child);
}
}
private static void Teardown(IStylesheetNode child)
{
if (!(child is Rule rule))
{
return;
}
rule.Parent = null;
rule.Owner = null;
}
private void Setup(IStylesheetNode child)
{
if (!(child is Rule rule))
{
return;
}
rule.Owner = this as Stylesheet;
rule.Parent = this as IRule;
}
public void RemoveChild(IStylesheetNode child)
{
Teardown(child);
var isRemoved = _children.Remove(child);
if (!isRemoved)
{
throw new InvalidOperationException($"Child node \"{child}\" was not removed from the stylesheet node \"{this}\"");
}
}
private static void Teardown(IStylesheetNode child)
{
var rule = child as Rule;
if (rule == null)
{
return;
}
rule.Parent = null;
rule.Owner = null;
}
public void InsertBefore(IStylesheetNode referenceChild, IStylesheetNode child)
{
if (referenceChild != null)
{
var index = _children.IndexOf(referenceChild);
InsertChild(index, child);
}
else
{
AppendChild(child);
}
}
public void ReplaceChild(IStylesheetNode oldChild, IStylesheetNode newChild)
{
for (var i = 0; i < _children.Count; i++)
{
if (ReferenceEquals(oldChild, _children[i]))
{
Teardown(oldChild);
Setup(newChild);
_children[i] = newChild;
return;
}
}
}
public static IEnumerable<T> GetAll<T>(this IStylesheetNode node)
where T : IStyleFormattable
{
if (node == null)
throw new ArgumentNullException(nameof(node));
if (node is T)
{
yield return (T)node;
}
foreach (var entity in node.Children.SelectMany(m => m.GetAll<T>()))
{
yield return entity;
}
}
protected void ReplaceSingle(IStylesheetNode oldNode, IStylesheetNode newNode)
{
if (oldNode != null)
{
if (newNode != null)
{
ReplaceChild(oldNode, newNode);
}
else
{
RemoveChild(oldNode);
}
}
else if (newNode != null)
{
AppendChild(newNode);
}
}
public static ICollection <Property> GetAllProperties(IStylesheetNode styleRule)
{
var declarations = new List <Property>();
foreach (var node in styleRule.Children)
{
if (node is Property declaration)
{
declarations.Add(declaration);
}
else
{
declarations.AddRange(GetAllProperties(node));
}
}
return(declarations);
}
public void RemoveChild(IStylesheetNode child)
{
Teardown(child);
_children.Remove(child);
}
public void InsertChild(int index, IStylesheetNode child)
{
Setup(child);
_children.Insert(index, child);
}
public void AppendChild(IStylesheetNode child)
{
Setup(child);
_children.Add(child);
}
