public static boolean isSelectorInQualified(@NotNull JetSimpleNameExpression nameExpression) {
PsiElement nameExpressionParent = nameExpression.getParent();
if (nameExpressionParent instanceof JetUserType) {
assert ((JetUserType) nameExpressionParent).getReferenceExpression() == nameExpression;
return ((JetUserType) nameExpressionParent).getQualifier() != null;
}
JetExpression selector = nameExpression;
if (nameExpressionParent instanceof JetCallExpression
&& ((JetCallExpression) nameExpressionParent).getCalleeExpression() == nameExpression) {
selector = (JetCallExpression) nameExpressionParent;
}
PsiElement selectorParent = selector.getParent();
return selectorParent instanceof JetQualifiedExpression
&& (((JetQualifiedExpression) selectorParent).getSelectorExpression() == selector);
}
public static boolean isLHSOfDot(@NotNull JetExpression expression) {
PsiElement parent = expression.getParent();
if (!(parent instanceof JetQualifiedExpression)) return false;
JetQualifiedExpression qualifiedParent = (JetQualifiedExpression) parent;
return qualifiedParent.getReceiverExpression() == expression || isLHSOfDot(qualifiedParent);
}
public static JetScope getExpressionMemberScope(
@NotNull ResolveSession resolveSession, @NotNull JetExpression expression) {
DelegatingBindingTrace trace =
new DelegatingBindingTrace(
resolveSession.getBindingContext(),
"trace to resolve a member scope of expression",
expression);
if (expression instanceof JetReferenceExpression) {
QualifiedExpressionResolver qualifiedExpressionResolver =
resolveSession.getInjector().getQualifiedExpressionResolver();
// In some type declaration
if (expression.getParent() instanceof JetUserType) {
JetUserType qualifier = ((JetUserType) expression.getParent()).getQualifier();
if (qualifier != null) {
Collection<? extends DeclarationDescriptor> descriptors =
qualifiedExpressionResolver.lookupDescriptorsForUserType(
qualifier, getExpressionResolutionScope(resolveSession, expression), trace);
for (DeclarationDescriptor descriptor : descriptors) {
if (descriptor instanceof LazyPackageDescriptor) {
return ((LazyPackageDescriptor) descriptor).getMemberScope();
}
}
}
}
// Inside import
if (PsiTreeUtil.getParentOfType(expression, JetImportDirective.class, false) != null) {
NamespaceDescriptor rootPackage = resolveSession.getPackageDescriptorByFqName(FqName.ROOT);
assert rootPackage != null;
if (expression.getParent() instanceof JetDotQualifiedExpression) {
JetExpression element =
((JetDotQualifiedExpression) expression.getParent()).getReceiverExpression();
String name = ((JetFile) expression.getContainingFile()).getPackageName();
NamespaceDescriptor filePackage =
name != null
? resolveSession.getPackageDescriptorByFqName(new FqName(name))
: rootPackage;
assert filePackage != null : "File package should be already resolved and be found";
JetScope scope = filePackage.getMemberScope();
Collection<? extends DeclarationDescriptor> descriptors;
if (element instanceof JetDotQualifiedExpression) {
descriptors =
qualifiedExpressionResolver.lookupDescriptorsForQualifiedExpression(
(JetDotQualifiedExpression) element,
rootPackage.getMemberScope(),
scope,
trace,
false,
false);
} else {
descriptors =
qualifiedExpressionResolver.lookupDescriptorsForSimpleNameReference(
(JetSimpleNameExpression) element,
rootPackage.getMemberScope(),
scope,
trace,
false,
false,
false);
}
for (DeclarationDescriptor descriptor : descriptors) {
if (descriptor instanceof NamespaceDescriptor) {
return ((NamespaceDescriptor) descriptor).getMemberScope();
}
}
} else {
return rootPackage.getMemberScope();
}
}
// Inside package declaration
JetNamespaceHeader namespaceHeader =
PsiTreeUtil.getParentOfType(expression, JetNamespaceHeader.class, false);
if (namespaceHeader != null) {
NamespaceDescriptor packageDescriptor =
resolveSession.getPackageDescriptorByFqName(
namespaceHeader.getParentFqName((JetReferenceExpression) expression));
if (packageDescriptor != null) {
return packageDescriptor.getMemberScope();
}
}
}
return null;
}
