private static TailType getReturnTail(PsiElement position) {
PsiElement scope = position;
while (true) {
if (scope instanceof PsiFile || scope instanceof PsiClassInitializer) {
return TailType.NONE;
}
if (scope instanceof PsiMethod) {
final PsiMethod method = (PsiMethod) scope;
if (method.isConstructor() || PsiType.VOID.equals(method.getReturnType())) {
return TailType.SEMICOLON;
}
return TailType.HUMBLE_SPACE_BEFORE_WORD;
}
if (scope instanceof PsiLambdaExpression) {
final PsiType returnType =
LambdaUtil.getFunctionalInterfaceReturnType(((PsiLambdaExpression) scope));
if (PsiType.VOID.equals(returnType)) {
return TailType.SEMICOLON;
}
return TailType.HUMBLE_SPACE_BEFORE_WORD;
}
scope = scope.getParent();
}
}
public static boolean hasAccessibleConstructor(PsiType type) {
if (type instanceof PsiArrayType) return true;
final PsiClass psiClass = PsiUtil.resolveClassInType(type);
if (psiClass == null || psiClass.isEnum() || psiClass.isAnnotationType()) return false;
if (!(psiClass instanceof PsiCompiledElement)) return true;
final PsiMethod[] methods = psiClass.getConstructors();
if (methods.length == 0) return true;
for (final PsiMethod method : methods) {
if (!method.hasModifierProperty(PsiModifier.PRIVATE)) return true;
}
return false;
}
private static boolean superConstructorHasParameters(PsiMethod method) {
final PsiClass psiClass = method.getContainingClass();
if (psiClass == null) {
return false;
}
final PsiClass superClass = psiClass.getSuperClass();
if (superClass != null) {
for (final PsiMethod psiMethod : superClass.getConstructors()) {
final PsiResolveHelper resolveHelper =
JavaPsiFacade.getInstance(method.getProject()).getResolveHelper();
if (resolveHelper.isAccessible(psiMethod, method, null)
&& psiMethod.getParameterList().getParameters().length > 0) {
return true;
}
}
}
return false;
}
private static void completeAnnotationAttributeName(
CompletionResultSet result, PsiElement insertedElement, CompletionParameters parameters) {
PsiNameValuePair pair = PsiTreeUtil.getParentOfType(insertedElement, PsiNameValuePair.class);
PsiAnnotationParameterList parameterList = (PsiAnnotationParameterList) pair.getParent();
PsiAnnotation anno = (PsiAnnotation) parameterList.getParent();
boolean showClasses = psiElement().afterLeaf("(").accepts(insertedElement);
PsiClass annoClass = null;
final PsiJavaCodeReferenceElement referenceElement = anno.getNameReferenceElement();
if (referenceElement != null) {
final PsiElement element = referenceElement.resolve();
if (element instanceof PsiClass) {
annoClass = (PsiClass) element;
if (annoClass.findMethodsByName("value", false).length == 0) {
showClasses = false;
}
}
}
if (showClasses && insertedElement.getParent() instanceof PsiReferenceExpression) {
final Set<LookupElement> set =
JavaCompletionUtil.processJavaReference(
insertedElement,
(PsiJavaReference) insertedElement.getParent(),
new ElementExtractorFilter(createAnnotationFilter(insertedElement)),
JavaCompletionProcessor.Options.DEFAULT_OPTIONS,
result.getPrefixMatcher(),
parameters);
for (final LookupElement element : set) {
result.addElement(element);
}
addAllClasses(parameters, result, new InheritorsHolder(insertedElement, result));
}
if (annoClass != null) {
final PsiNameValuePair[] existingPairs = parameterList.getAttributes();
methods:
for (PsiMethod method : annoClass.getMethods()) {
if (!(method instanceof PsiAnnotationMethod)) continue;
final String attrName = method.getName();
for (PsiNameValuePair existingAttr : existingPairs) {
if (PsiTreeUtil.isAncestor(existingAttr, insertedElement, false)) break;
if (Comparing.equal(existingAttr.getName(), attrName)
|| PsiAnnotation.DEFAULT_REFERENCED_METHOD_NAME.equals(attrName)
&& existingAttr.getName() == null) continue methods;
}
LookupElementBuilder element =
LookupElementBuilder.createWithIcon(method)
.withInsertHandler(
new InsertHandler<LookupElement>() {
@Override
public void handleInsert(InsertionContext context, LookupElement item) {
final Editor editor = context.getEditor();
TailType.EQ.processTail(editor, editor.getCaretModel().getOffset());
context.setAddCompletionChar(false);
context.commitDocument();
PsiAnnotationParameterList paramList =
PsiTreeUtil.findElementOfClassAtOffset(
context.getFile(),
context.getStartOffset(),
PsiAnnotationParameterList.class,
false);
if (paramList != null
&& paramList.getAttributes().length > 0
&& paramList.getAttributes()[0].getName() == null) {
int valueOffset =
paramList.getAttributes()[0].getTextRange().getStartOffset();
context
.getDocument()
.insertString(
valueOffset, PsiAnnotation.DEFAULT_REFERENCED_METHOD_NAME);
TailType.EQ.processTail(
editor,
valueOffset + PsiAnnotation.DEFAULT_REFERENCED_METHOD_NAME.length());
}
}
});
PsiAnnotationMemberValue defaultValue = ((PsiAnnotationMethod) method).getDefaultValue();
if (defaultValue != null) {
Object constant =
JavaPsiFacade.getInstance(method.getProject())
.getConstantEvaluationHelper()
.computeConstantExpression(defaultValue);
if (constant != null) {
element =
element.withTailText(
" default " + (constant instanceof String ? "\"" + constant + "\"" : constant),
true);
}
}
result.addElement(element);
}
}
}
@NotNull
private static LookupElement castQualifier(
@NotNull LookupElement item,
@Nullable final PsiTypeLookupItem castTypeItem,
@Nullable PsiType plainQualifier,
JavaCompletionProcessor processor) {
if (castTypeItem == null) {
return item;
}
if (plainQualifier != null) {
Object o = item.getObject();
if (o instanceof PsiMethod) {
PsiType castType = castTypeItem.getType();
if (plainQualifier instanceof PsiClassType && castType instanceof PsiClassType) {
PsiMethod method = (PsiMethod) o;
PsiClassType.ClassResolveResult plainResult =
((PsiClassType) plainQualifier).resolveGenerics();
PsiClass plainClass = plainResult.getElement();
if (plainClass != null && plainClass.findMethodBySignature(method, true) != null) {
PsiClass castClass = ((PsiClassType) castType).resolveGenerics().getElement();
if (castClass == null || !castClass.isInheritor(plainClass, true)) {
return item;
}
PsiSubstitutor plainSub = plainResult.getSubstitutor();
PsiSubstitutor castSub =
TypeConversionUtil.getSuperClassSubstitutor(plainClass, (PsiClassType) castType);
PsiType returnType = method.getReturnType();
if (method.getSignature(plainSub).equals(method.getSignature(castSub))) {
PsiType typeAfterCast = toRaw(castSub.substitute(returnType));
PsiType typeDeclared = toRaw(plainSub.substitute(returnType));
if (typeAfterCast != null
&& typeDeclared != null
&& typeAfterCast.isAssignableFrom(typeDeclared)
&& processor.isAccessible(plainClass.findMethodBySignature(method, true))) {
return item;
}
}
}
}
} else if (containsMember(plainQualifier, o)) {
return item;
}
}
return LookupElementDecorator.withInsertHandler(
item,
new InsertHandlerDecorator<LookupElement>() {
@Override
public void handleInsert(
InsertionContext context, LookupElementDecorator<LookupElement> item) {
final Document document = context.getEditor().getDocument();
context.commitDocument();
final PsiFile file = context.getFile();
final PsiJavaCodeReferenceElement ref =
PsiTreeUtil.findElementOfClassAtOffset(
file, context.getStartOffset(), PsiJavaCodeReferenceElement.class, false);
if (ref != null) {
final PsiElement qualifier = ref.getQualifier();
if (qualifier != null) {
final CommonCodeStyleSettings settings = context.getCodeStyleSettings();
final String parenSpace = settings.SPACE_WITHIN_PARENTHESES ? " " : "";
document.insertString(qualifier.getTextRange().getEndOffset(), parenSpace + ")");
final String spaceWithin = settings.SPACE_WITHIN_CAST_PARENTHESES ? " " : "";
final String prefix = "(" + parenSpace + "(" + spaceWithin;
final String spaceAfter = settings.SPACE_AFTER_TYPE_CAST ? " " : "";
final int exprStart = qualifier.getTextRange().getStartOffset();
document.insertString(exprStart, prefix + spaceWithin + ")" + spaceAfter);
CompletionUtil.emulateInsertion(context, exprStart + prefix.length(), castTypeItem);
PsiDocumentManager.getInstance(file.getProject())
.doPostponedOperationsAndUnblockDocument(document);
context.getEditor().getCaretModel().moveToOffset(context.getTailOffset());
}
}
item.getDelegate().handleInsert(context);
}
});
}