public static AccessibilityFilter GetValidAccessibilityFilter(
MemberDeclarationListSelection selectedMembers,
SemanticModel semanticModel,
CancellationToken cancellationToken = default(CancellationToken))
{
if (selectedMembers.Count < 2)
{
return(AccessibilityFilter.None);
}
ImmutableArray <Accessibility> avaiableAccessibilities = AvailableAccessibilities;
var all = AccessibilityFilter.None;
AccessibilityFilter valid = AccessibilityFilter.Public
| AccessibilityFilter.Internal
| AccessibilityFilter.Protected
| AccessibilityFilter.Private;
foreach (MemberDeclarationSyntax member in selectedMembers)
{
Accessibility accessibility = SyntaxAccessibility.GetExplicitAccessibility(member);
if (accessibility == Accessibility.NotApplicable)
{
accessibility = SyntaxAccessibility.GetDefaultExplicitAccessibility(member);
if (accessibility == Accessibility.NotApplicable)
{
return(AccessibilityFilter.None);
}
}
switch (accessibility)
{
case Accessibility.Private:
case Accessibility.Protected:
case Accessibility.ProtectedAndInternal:
case Accessibility.ProtectedOrInternal:
case Accessibility.Internal:
case Accessibility.Public:
{
all |= accessibility.GetAccessibilityFilter();
break;
}
default:
{
Debug.Fail(accessibility.ToString());
return(AccessibilityFilter.None);
}
}
ModifierListInfo modifiersInfo = SyntaxInfo.ModifierListInfo(member);
if (modifiersInfo.Modifiers.ContainsAny(
SyntaxKind.AbstractKeyword,
SyntaxKind.VirtualKeyword,
SyntaxKind.OverrideKeyword))
{
valid &= ~AccessibilityFilter.Private;
}
if (modifiersInfo.IsOverride &&
IsBaseDeclarationWithoutSource(member, semanticModel, cancellationToken))
{
switch (accessibility)
{
case Accessibility.Private:
case Accessibility.Protected:
case Accessibility.Internal:
case Accessibility.Public:
{
valid &= accessibility.GetAccessibilityFilter();
if (valid == AccessibilityFilter.None)
{
return(AccessibilityFilter.None);
}
avaiableAccessibilities = _accessibilityArrayMap[accessibility];
continue;
}
default:
{
return(AccessibilityFilter.None);
}
}
}
foreach (Accessibility accessibility2 in avaiableAccessibilities)
{
if (accessibility != accessibility2 &&
!SyntaxAccessibility.IsValidAccessibility(member, accessibility2, ignoreOverride: true))
{
valid &= ~accessibility2.GetAccessibilityFilter();
if (valid == AccessibilityFilter.None)
{
return(AccessibilityFilter.None);
}
}
}
}
switch (all)
{
case AccessibilityFilter.Private:
case AccessibilityFilter.Protected:
case AccessibilityFilter.Internal:
case AccessibilityFilter.Public:
{
valid &= ~all;
break;
}
}
return(valid);
}