public static void RemoveValue(TTextView textView, object key)
{
if (textView.Properties.TryGetProperty(typeof(AutoClosingViewProperty <TProperty, TTextView>), out AutoClosingViewProperty <TProperty, TTextView> properties))
{
properties.Remove(key);
}
}
public static bool GetOrCreateValue(
TTextView textView,
object key,
Func <TTextView, TProperty> valueCreator,
out TProperty value
)
{
Contract.ThrowIfTrue(textView.IsClosed);
var properties = textView.Properties.GetOrCreateSingletonProperty(
() => new AutoClosingViewProperty <TProperty, TTextView>(textView)
);
if (!properties.TryGetValue(key, out var priorValue))
{
// Need to create it.
value = valueCreator(textView);
properties.Add(key, value);
return(true);
}
// Already there.
value = priorValue;
return(false);
}
public static void AddValue(TTextView textView, object key, TProperty value)
{
Contract.ThrowIfTrue(textView.IsClosed);
var properties = textView.Properties.GetOrCreateSingletonProperty(
() => new AutoClosingViewProperty <TProperty, TTextView>(textView)
);
properties.Add(key, value);
}
public static bool TryGetValue(
TTextView textView,
object key,
[MaybeNullWhen(false)] out TProperty value)
{
Contract.ThrowIfTrue(textView.IsClosed);
var properties = textView.Properties.GetOrCreateSingletonProperty(() => new AutoClosingViewProperty <TProperty, TTextView>(textView));
return(properties.TryGetValue(key, out value));
}
private AutoClosingViewProperty(TTextView textView)
{
_textView = textView;
_textView.Closed += OnTextViewClosed;
}
