public Selector Copy()
{
Selector s = new Selector();
s.Selects = this.Selects;
s.Type = this.Type;
foreach (KeyValuePair<string, Instance> pair in Children)
{
s.Children.Add(pair.Key, pair.Value);
}
return s;
}
/// <summary>
///
/// </summary>
/// <param name="src">Style to merge into THIS one.</param>
/// <param name="selector">Which particular selector to merge</param>
public void Merge(Selector s)
{
foreach (KeyValuePair<string, Instance> pair in s.Children)
{
if (this.Children.ContainsKey(pair.Key))
{
this.Children[pair.Key] = pair.Value;
}
else
{
this.Children.Add(pair.Key, pair.Value);
}
}
}
/// <summary>
/// First implementation is a very simple cascade:
/// (1) Apply universal styles, if applicable.
/// (2) If found, apply styles
/// </summary>
/// <param name="instance"></param>
public void ApplyStyleCascadeToInstance( Instance instance )
{
// Create selector by building up cascade
Selector selectorToApply = new Selector();
// Start with all universal selectors
// TODO: Why do this on every call? Can't we precalculate the universal ones?
foreach( Selector selector in m_UniversalStyle.Children.Convert<Selector>())
{
selectorToApply.Merge( selector as Selector);
}
// Replace with type styles, if applicable
if (m_StylesForType.Children.ContainsKey(instance.GetSimpleClassName()))
{
selectorToApply.Merge(m_StylesForType.Children[instance.GetSimpleClassName()] as Selector);
}
// CssClass attribute styles override all previous
if (m_StylesForCssClass.Children.ContainsKey(instance.CssClass))
{
selectorToApply.Merge(m_StylesForCssClass.Children[instance.CssClass] as Selector);
}
// Id attributes override all previous
if (m_StylesForId.Children.ContainsKey(instance.Name))
{
selectorToApply.Merge(m_StylesForId.Children[instance.Name] as Selector);
}
// We now have a list of styles to apply to this instance, but not all of them
// may be real properties of the instance. Try each one.
selectorToApply.Apply(instance);
}