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();
}
}
@NotNull
@Override
public MyResult weigh(@NotNull LookupElement item) {
final Object object = item.getObject();
if (object instanceof PsiClass) {
if (object instanceof PsiTypeParameter) return MyResult.typeParameter;
if (myTypeParameter != null
&& object.equals(
PsiUtil.resolveClassInType(
TypeConversionUtil.typeParameterErasure(myTypeParameter)))) {
return MyResult.exactlyExpected;
}
}
if (myExpectedTypes == null) return MyResult.normal;
PsiType itemType = JavaCompletionUtil.getLookupElementType(item);
if (itemType == null || !itemType.isValid()) return MyResult.normal;
if (object instanceof PsiClass) {
for (final ExpectedTypeInfo info : myExpectedTypes) {
if (TypeConversionUtil.erasure(info.getType().getDeepComponentType())
.equals(TypeConversionUtil.erasure(itemType))) {
return AbstractExpectedTypeSkipper.skips(item, myLocation)
? MyResult.expectedNoSelect
: MyResult.exactlyExpected;
}
}
}
for (final ExpectedTypeInfo expectedInfo : myExpectedTypes) {
final PsiType defaultType = expectedInfo.getDefaultType();
final PsiType expectedType = expectedInfo.getType();
if (!expectedType.isValid()) {
return MyResult.normal;
}
if (defaultType != expectedType) {
if (defaultType.equals(itemType)) {
return MyResult.exactlyDefault;
}
if (defaultType.isAssignableFrom(itemType)) {
return MyResult.ofDefaultType;
}
}
if (PsiType.VOID.equals(itemType) && PsiType.VOID.equals(expectedType)) {
return MyResult.exactlyExpected;
}
}
return MyResult.normal;
}
private static boolean hasNonVoid(ExpectedTypeInfo[] expectedInfos) {
boolean hasNonVoid = false;
for (ExpectedTypeInfo info : expectedInfos) {
if (!PsiType.VOID.equals(info.getType())) {
hasNonVoid = true;
}
}
return hasNonVoid;
}
public static boolean insertTail(
InsertionContext context, LookupElement item, TailType tailType, boolean hasTail) {
TailType toInsert = tailType;
LookupItem<?> lookupItem = item.as(LookupItem.CLASS_CONDITION_KEY);
if (lookupItem == null
|| lookupItem.getAttribute(LookupItem.TAIL_TYPE_ATTR) != TailType.UNKNOWN) {
if (!hasTail
&& item.getObject() instanceof PsiMethod
&& PsiType.VOID.equals(((PsiMethod) item.getObject()).getReturnType())) {
PsiDocumentManager.getInstance(context.getProject()).commitAllDocuments();
if (psiElement()
.beforeLeaf(psiElement().withText("."))
.accepts(context.getFile().findElementAt(context.getTailOffset() - 1))) {
return false;
}
boolean insertAdditionalSemicolon = true;
final PsiReferenceExpression referenceExpression =
PsiTreeUtil.getTopmostParentOfType(
context.getFile().findElementAt(context.getStartOffset()),
PsiReferenceExpression.class);
if (referenceExpression instanceof PsiMethodReferenceExpression
&& LambdaHighlightingUtil.insertSemicolon(referenceExpression.getParent())) {
insertAdditionalSemicolon = false;
} else if (referenceExpression != null) {
PsiElement parent = referenceExpression.getParent();
if (parent instanceof PsiMethodCallExpression) {
parent = parent.getParent();
}
if (parent instanceof PsiLambdaExpression
&& !LambdaHighlightingUtil.insertSemicolonAfter((PsiLambdaExpression) parent)) {
insertAdditionalSemicolon = false;
}
}
if (insertAdditionalSemicolon) {
toInsert = TailType.SEMICOLON;
}
}
}
toInsert.processTail(context.getEditor(), context.getTailOffset());
return true;
}
private static ExpectedTypeMatching getExpectedTypeMatching(
LookupElement item, ExpectedTypeInfo[] expectedInfos) {
PsiType itemType = JavaCompletionUtil.getLookupElementType(item);
if (itemType != null) {
for (final ExpectedTypeInfo expectedInfo : expectedInfos) {
final PsiType defaultType = expectedInfo.getDefaultType();
final PsiType expectedType = expectedInfo.getType();
if (defaultType != expectedType && defaultType.isAssignableFrom(itemType)) {
return ExpectedTypeMatching.ofDefaultType;
}
if (expectedType.isAssignableFrom(itemType)) {
return ExpectedTypeMatching.expected;
}
}
}
boolean hasNonVoid = false;
for (ExpectedTypeInfo info : expectedInfos) {
if (!PsiType.VOID.equals(info.getType())) {
hasNonVoid = true;
}
}
if (hasNonVoid) {
if (item.getObject() instanceof PsiKeyword) {
String keyword = ((PsiKeyword) item.getObject()).getText();
if (PsiKeyword.NEW.equals(keyword) || PsiKeyword.NULL.equals(keyword)) {
return ExpectedTypeMatching.maybeExpected;
}
}
} else if (expectedInfos.length > 0) {
return ExpectedTypeMatching.unexpected;
}
return ExpectedTypeMatching.normal;
}