private static Icon getIcon(PsiElement element, DeclarationDescriptor declarationDescriptor) {
if (element.isValid()) {
boolean isClass = element instanceof PsiClass || element instanceof JetClass;
int flags = isClass ? 0 : Iconable.ICON_FLAG_VISIBILITY;
if (element instanceof JetDeclaration) { // kotlin declaration
// visibility and abstraction better detect by a descriptor
return JetDescriptorIconProvider.getIcon(declarationDescriptor, element, flags);
} else {
// it is better to show java icons for java code
return element.getIcon(flags);
}
}
return JetDescriptorIconProvider.getIcon(declarationDescriptor, element, 0);
}
@NotNull
public static LookupElement createLookupElement(
@NotNull KotlinCodeAnalyzer analyzer,
@NotNull DeclarationDescriptor descriptor,
@Nullable PsiElement declaration) {
if (declaration != null) {
MutableLookupElement javaLookupElement = createJavaLookupElementIfPossible(declaration);
if (javaLookupElement != null) {
InsertHandler<LookupElement> customHandler = getInsertHandler(descriptor);
if (customHandler != null) {
return javaLookupElement.setInsertHandler(getInsertHandler(descriptor));
} else {
return javaLookupElement;
}
}
}
LookupElementBuilder element =
LookupElementBuilder.create(
new JetLookupObject(descriptor, analyzer, declaration), descriptor.getName().getName());
String presentableText = descriptor.getName().getName();
String typeText = "";
String tailText = "";
boolean tailTextGrayed = true;
if (descriptor instanceof FunctionDescriptor) {
FunctionDescriptor functionDescriptor = (FunctionDescriptor) descriptor;
JetType returnType = functionDescriptor.getReturnType();
typeText = DescriptorRenderer.TEXT.renderType(returnType);
presentableText += DescriptorRenderer.TEXT.renderFunctionParameters(functionDescriptor);
boolean extensionFunction = functionDescriptor.getReceiverParameter() != null;
DeclarationDescriptor containingDeclaration = descriptor.getContainingDeclaration();
if (containingDeclaration != null && extensionFunction) {
tailText +=
" for "
+ DescriptorRenderer.TEXT.renderType(
functionDescriptor.getReceiverParameter().getType());
tailText += " in " + DescriptorUtils.getFQName(containingDeclaration);
}
} else if (descriptor instanceof VariableDescriptor) {
JetType outType = ((VariableDescriptor) descriptor).getType();
typeText = DescriptorRenderer.TEXT.renderType(outType);
} else if (descriptor instanceof ClassDescriptor) {
DeclarationDescriptor declaredIn = descriptor.getContainingDeclaration();
assert declaredIn != null;
tailText = " (" + DescriptorUtils.getFQName(declaredIn) + ")";
tailTextGrayed = true;
} else {
typeText = DescriptorRenderer.TEXT.render(descriptor);
}
element = element.withInsertHandler(getInsertHandler(descriptor));
element =
element
.withTailText(tailText, tailTextGrayed)
.withTypeText(typeText)
.withPresentableText(presentableText);
element =
element.withIcon(
JetDescriptorIconProvider.getIcon(descriptor, Iconable.ICON_FLAG_VISIBILITY));
element = element.withStrikeoutness(KotlinBuiltIns.getInstance().isDeprecated(descriptor));
return element;
}