internal override IEnumerable <OptionKey> GetChangedOptions(OptionSet?optionSet)
{
if (optionSet == this)
{
yield break;
}
foreach (var(key, value) in _values)
{
var currentValue = optionSet?.GetOption(key);
if (!object.Equals(currentValue, value))
{
yield return(key);
}
}
}
private protected override object?GetOptionCore(OptionKey optionKey) => _backingOptionSet.GetOption(optionKey);
public override object GetOption(OptionKey optionKey)
{
return(_backingOptionSet.GetOption(optionKey));
}
public void SetOptions(OptionSet optionSet)
{
if (optionSet == null)
{
throw new ArgumentNullException(nameof(optionSet));
}
var workspaceOptionSet = optionSet as WorkspaceOptionSet;
if (workspaceOptionSet == null)
{
throw new ArgumentException(WorkspacesResources.OptionsDidNotComeFromWorkspace, paramName: nameof(optionSet));
}
var changedOptions = new List <OptionChangedEventArgs>();
lock (_gate)
{
foreach (var optionKey in workspaceOptionSet.GetAccessedOptions())
{
var setValue = optionSet.GetOption(optionKey);
object currentValue = this.GetOption(optionKey);
if (object.Equals(currentValue, setValue))
{
// Identical, so nothing is changing
continue;
}
// The value is actually changing, so update
changedOptions.Add(new OptionChangedEventArgs(optionKey, setValue));
_currentValues = _currentValues.SetItem(optionKey, setValue);
ImmutableArray <Lazy <IOptionSerializer, OptionSerializerMetadata> > optionSerializers;
if (_featureNameToOptionSerializers.TryGetValue(optionKey.Option.Feature, out optionSerializers))
{
foreach (var serializer in optionSerializers)
{
// There can be options (ex, formatting) that only exist in only one specific language. In those cases,
// feature's serializer should exist in only that language.
if (!SupportedSerializer(optionKey, serializer.Metadata))
{
continue;
}
if (serializer.Value.TryPersist(optionKey, setValue))
{
break;
}
}
}
}
}
// Outside of the lock, raise events
var optionChanged = OptionChanged;
if (optionChanged != null)
{
foreach (var changedOption in changedOptions)
{
optionChanged(this, changedOption);
}
}
}