@Nullable
private static JetSimpleNameExpression getCallSimpleNameExpression(
JetValueArgumentList argumentList) {
if (!(argumentList.getParent() instanceof JetCallElement)) {
return null;
}
JetCallElement callExpression = (JetCallElement) argumentList.getParent();
JetExpression calleeExpression = callExpression.getCalleeExpression();
if (calleeExpression == null) {
return null;
}
if (calleeExpression instanceof JetSimpleNameExpression) {
return (JetSimpleNameExpression) calleeExpression;
} else if (calleeExpression instanceof JetConstructorCalleeExpression) {
JetConstructorCalleeExpression constructorCalleeExpression =
(JetConstructorCalleeExpression) calleeExpression;
if (constructorCalleeExpression.getConstructorReferenceExpression()
instanceof JetSimpleNameExpression) {
return (JetSimpleNameExpression)
constructorCalleeExpression.getConstructorReferenceExpression();
}
}
return null;
}
private static JetValueArgumentList findCall(CreateParameterInfoContext context) {
// todo: calls to this constructors, when we will have auxiliary constructors
PsiFile file = context.getFile();
if (!(file instanceof JetFile)) return null;
PsiElement element = file.findElementAt(context.getOffset());
while (element != null && !(element instanceof JetValueArgumentList)) {
element = element.getParent();
}
if (element == null) return null;
JetValueArgumentList argumentList = (JetValueArgumentList) element;
JetCallElement callExpression;
if (element.getParent() instanceof JetCallElement) {
callExpression = (JetCallElement) element.getParent();
} else {
return null;
}
BindingContext bindingContext = AnalyzeSingleFileUtil.getContextForSingleFile((JetFile) file);
JetExpression calleeExpression = callExpression.getCalleeExpression();
if (calleeExpression == null) return null;
JetSimpleNameExpression refExpression = null;
if (calleeExpression instanceof JetSimpleNameExpression) {
refExpression = (JetSimpleNameExpression) calleeExpression;
} else if (calleeExpression instanceof JetConstructorCalleeExpression) {
JetConstructorCalleeExpression constructorCalleeExpression =
(JetConstructorCalleeExpression) calleeExpression;
if (constructorCalleeExpression.getConstructorReferenceExpression()
instanceof JetSimpleNameExpression) {
refExpression =
(JetSimpleNameExpression)
constructorCalleeExpression.getConstructorReferenceExpression();
}
}
if (refExpression != null) {
JetScope scope = bindingContext.get(BindingContext.RESOLUTION_SCOPE, refExpression);
DeclarationDescriptor placeDescriptor = null;
if (scope != null) {
placeDescriptor = scope.getContainingDeclaration();
}
Collection<DeclarationDescriptor> variants =
TipsManager.getReferenceVariants(refExpression, bindingContext);
Name refName = refExpression.getReferencedNameAsName();
PsiReference[] references = refExpression.getReferences();
if (references.length == 0) return null;
ArrayList<DeclarationDescriptor> itemsToShow = new ArrayList<DeclarationDescriptor>();
for (DeclarationDescriptor variant : variants) {
if (variant instanceof FunctionDescriptor) {
FunctionDescriptor functionDescriptor = (FunctionDescriptor) variant;
if (functionDescriptor.getName().equals(refName)) {
// todo: renamed functions?
if (placeDescriptor != null
&& !JetVisibilityChecker.isVisible(placeDescriptor, functionDescriptor)) continue;
itemsToShow.add(functionDescriptor);
}
} else if (variant instanceof ClassDescriptor) {
ClassDescriptor classDescriptor = (ClassDescriptor) variant;
if (classDescriptor.getName().equals(refName)) {
// todo: renamed classes?
for (ConstructorDescriptor constructorDescriptor : classDescriptor.getConstructors()) {
if (placeDescriptor != null
&& !JetVisibilityChecker.isVisible(placeDescriptor, constructorDescriptor))
continue;
itemsToShow.add(constructorDescriptor);
}
}
}
}
context.setItemsToShow(ArrayUtil.toObjectArray(itemsToShow));
return argumentList;
}
return null;
}
@Override
public void updateUI(Object descriptor, ParameterInfoUIContext context) {
// todo: when we will have ability to pass Array as vararg, implement such feature here too?
if (context == null
|| context.getParameterOwner() == null
|| !context.getParameterOwner().isValid()) {
return;
}
PsiElement parameterOwner = context.getParameterOwner();
if (parameterOwner instanceof JetValueArgumentList) {
JetValueArgumentList argumentList = (JetValueArgumentList) parameterOwner;
if (descriptor instanceof FunctionDescriptor) {
JetFile file = (JetFile) argumentList.getContainingFile();
BindingContext bindingContext = AnalyzeSingleFileUtil.getContextForSingleFile(file);
FunctionDescriptor functionDescriptor = (FunctionDescriptor) descriptor;
StringBuilder builder = new StringBuilder();
List<ValueParameterDescriptor> valueParameters = functionDescriptor.getValueParameters();
List<JetValueArgument> valueArguments = argumentList.getArguments();
int currentParameterIndex = context.getCurrentParameterIndex();
int boldStartOffset = -1;
int boldEndOffset = -1;
boolean isGrey = false;
boolean isDeprecated = false; // todo: add deprecation check
Color color = context.getDefaultParameterColor();
PsiElement parent = argumentList.getParent();
if (parent instanceof JetCallElement) {
JetCallElement callExpression = (JetCallElement) parent;
JetExpression calleeExpression = callExpression.getCalleeExpression();
JetSimpleNameExpression refExpression = null;
if (calleeExpression instanceof JetSimpleNameExpression) {
refExpression = (JetSimpleNameExpression) calleeExpression;
} else if (calleeExpression instanceof JetConstructorCalleeExpression) {
JetConstructorCalleeExpression constructorCalleeExpression =
(JetConstructorCalleeExpression) calleeExpression;
if (constructorCalleeExpression.getConstructorReferenceExpression()
instanceof JetSimpleNameExpression) {
refExpression =
(JetSimpleNameExpression)
constructorCalleeExpression.getConstructorReferenceExpression();
}
}
if (refExpression != null) {
DeclarationDescriptor declarationDescriptor =
bindingContext.get(BindingContext.REFERENCE_TARGET, refExpression);
if (declarationDescriptor != null) {
if (declarationDescriptor == functionDescriptor) {
color = GREEN_BACKGROUND;
}
}
}
}
boolean[] usedIndexes = new boolean[valueParameters.size()];
boolean namedMode = false;
Arrays.fill(usedIndexes, false);
if ((currentParameterIndex >= valueParameters.size()
&& (valueParameters.size() > 0 || currentParameterIndex > 0))
&& (valueParameters.size() == 0
|| valueParameters.get(valueParameters.size() - 1).getVarargElementType()
== null)) {
isGrey = true;
}
if (valueParameters.size() == 0)
builder.append(CodeInsightBundle.message("parameter.info.no.parameters"));
for (int i = 0; i < valueParameters.size(); ++i) {
if (i != 0) builder.append(", ");
boolean highlightParameter =
i == currentParameterIndex
|| (!namedMode
&& i < currentParameterIndex
&& valueParameters.get(valueParameters.size() - 1).getVarargElementType()
!= null);
if (highlightParameter) boldStartOffset = builder.length();
if (!namedMode) {
if (valueArguments.size() > i) {
JetValueArgument argument = valueArguments.get(i);
if (argument.isNamed()) {
namedMode = true;
} else {
ValueParameterDescriptor param = valueParameters.get(i);
builder.append(renderParameter(param, false, bindingContext));
if (i < currentParameterIndex) {
if (argument.getArgumentExpression() != null) {
// check type
JetType paramType = getActualParameterType(param);
JetType exprType =
bindingContext.get(
BindingContext.EXPRESSION_TYPE, argument.getArgumentExpression());
if (exprType != null
&& !JetTypeChecker.INSTANCE.isSubtypeOf(exprType, paramType)) isGrey = true;
} else isGrey = true;
}
usedIndexes[i] = true;
}
} else {
ValueParameterDescriptor param = valueParameters.get(i);
builder.append(renderParameter(param, false, bindingContext));
}
}
if (namedMode) {
boolean takeAnyArgument = true;
if (valueArguments.size() > i) {
JetValueArgument argument = valueArguments.get(i);
if (argument.isNamed()) {
for (int j = 0; j < valueParameters.size(); ++j) {
JetSimpleNameExpression referenceExpression =
argument.getArgumentName().getReferenceExpression();
ValueParameterDescriptor param = valueParameters.get(j);
if (referenceExpression != null
&& !usedIndexes[j]
&& param.getName().equals(referenceExpression.getReferencedNameAsName())) {
takeAnyArgument = false;
usedIndexes[j] = true;
builder.append(renderParameter(param, true, bindingContext));
if (i < currentParameterIndex) {
if (argument.getArgumentExpression() != null) {
// check type
JetType paramType = getActualParameterType(param);
JetType exprType =
bindingContext.get(
BindingContext.EXPRESSION_TYPE, argument.getArgumentExpression());
if (exprType != null
&& !JetTypeChecker.INSTANCE.isSubtypeOf(exprType, paramType))
isGrey = true;
} else isGrey = true;
}
break;
}
}
}
}
if (takeAnyArgument) {
if (i < currentParameterIndex) isGrey = true;
for (int j = 0; j < valueParameters.size(); ++j) {
ValueParameterDescriptor param = valueParameters.get(j);
if (!usedIndexes[j]) {
usedIndexes[j] = true;
builder.append(renderParameter(param, true, bindingContext));
break;
}
}
}
}
if (highlightParameter) boldEndOffset = builder.length();
}
if (builder.toString().isEmpty()) context.setUIComponentEnabled(false);
else
context.setupUIComponentPresentation(
builder.toString(),
boldStartOffset,
boldEndOffset,
isGrey,
isDeprecated,
false,
color);
} else context.setUIComponentEnabled(false);
}
}
@NotNull
/*package*/ OverloadResolutionResultsImpl<FunctionDescriptor> resolveFunctionCall(
@NotNull BasicCallResolutionContext context) {
ProgressIndicatorProvider.checkCanceled();
List<ResolutionTask<CallableDescriptor, FunctionDescriptor>> prioritizedTasks;
JetExpression calleeExpression = context.call.getCalleeExpression();
JetReferenceExpression functionReference;
if (calleeExpression instanceof JetSimpleNameExpression) {
JetSimpleNameExpression expression = (JetSimpleNameExpression) calleeExpression;
functionReference = expression;
ExpressionTypingUtils.checkCapturingInClosure(expression, context.trace, context.scope);
Name name = expression.getReferencedNameAsName();
prioritizedTasks =
TaskPrioritizer.<CallableDescriptor, FunctionDescriptor>computePrioritizedTasks(
context,
name,
functionReference,
CallableDescriptorCollectors.FUNCTIONS_AND_VARIABLES);
ResolutionTask.DescriptorCheckStrategy abstractConstructorCheck =
new ResolutionTask.DescriptorCheckStrategy() {
@Override
public <D extends CallableDescriptor> boolean performAdvancedChecks(
D descriptor, BindingTrace trace, TracingStrategy tracing) {
if (descriptor instanceof ConstructorDescriptor) {
Modality modality =
((ConstructorDescriptor) descriptor).getContainingDeclaration().getModality();
if (modality == Modality.ABSTRACT) {
tracing.instantiationOfAbstractClass(trace);
return false;
}
}
return true;
}
};
for (ResolutionTask task : prioritizedTasks) {
task.setCheckingStrategy(abstractConstructorCheck);
}
} else {
JetValueArgumentList valueArgumentList = context.call.getValueArgumentList();
PsiElement reportAbsenceOn =
valueArgumentList == null ? context.call.getCallElement() : valueArgumentList;
if (calleeExpression instanceof JetConstructorCalleeExpression) {
assert !context.call.getExplicitReceiver().exists();
JetConstructorCalleeExpression expression =
(JetConstructorCalleeExpression) calleeExpression;
functionReference = expression.getConstructorReferenceExpression();
if (functionReference == null) {
return checkArgumentTypesAndFail(context); // No type there
}
JetTypeReference typeReference = expression.getTypeReference();
assert typeReference != null;
JetType constructedType =
typeResolver.resolveType(context.scope, typeReference, context.trace, true);
if (constructedType.isError()) {
return checkArgumentTypesAndFail(context);
}
DeclarationDescriptor declarationDescriptor =
constructedType.getConstructor().getDeclarationDescriptor();
if (declarationDescriptor instanceof ClassDescriptor) {
ClassDescriptor classDescriptor = (ClassDescriptor) declarationDescriptor;
Collection<ConstructorDescriptor> constructors = classDescriptor.getConstructors();
if (constructors.isEmpty()) {
context.trace.report(NO_CONSTRUCTOR.on(reportAbsenceOn));
return checkArgumentTypesAndFail(context);
}
Collection<ResolutionCandidate<CallableDescriptor>> candidates =
TaskPrioritizer.<CallableDescriptor>convertWithImpliedThis(
context.scope,
Collections.<ReceiverValue>singletonList(NO_RECEIVER),
constructors);
prioritizedTasks =
TaskPrioritizer
.<CallableDescriptor, FunctionDescriptor>computePrioritizedTasksFromCandidates(
context, functionReference, candidates, null);
} else {
context.trace.report(NOT_A_CLASS.on(calleeExpression));
return checkArgumentTypesAndFail(context);
}
} else if (calleeExpression instanceof JetThisReferenceExpression) {
functionReference = (JetThisReferenceExpression) calleeExpression;
DeclarationDescriptor containingDeclaration = context.scope.getContainingDeclaration();
if (containingDeclaration instanceof ConstructorDescriptor) {
containingDeclaration = containingDeclaration.getContainingDeclaration();
}
assert containingDeclaration instanceof ClassDescriptor;
ClassDescriptor classDescriptor = (ClassDescriptor) containingDeclaration;
Collection<ConstructorDescriptor> constructors = classDescriptor.getConstructors();
if (constructors.isEmpty()) {
context.trace.report(NO_CONSTRUCTOR.on(reportAbsenceOn));
return checkArgumentTypesAndFail(context);
}
List<ResolutionCandidate<CallableDescriptor>> candidates =
ResolutionCandidate.<CallableDescriptor>convertCollection(
constructors, JetPsiUtil.isSafeCall(context.call));
prioritizedTasks =
Collections.singletonList(
new ResolutionTask<CallableDescriptor, FunctionDescriptor>(
candidates, functionReference, context)); // !! DataFlowInfo.EMPTY
} else if (calleeExpression != null) {
// Here we handle the case where the callee expression must be something of type function,
// e.g. (foo.bar())(1, 2)
JetType calleeType =
expressionTypingServices.safeGetType(
context.scope,
calleeExpression,
NO_EXPECTED_TYPE,
context.dataFlowInfo,
context
.trace); // We are actually expecting a function, but there seems to be no easy
// way of expressing this
if (!KotlinBuiltIns.getInstance().isFunctionOrExtensionFunctionType(calleeType)) {
// checkTypesWithNoCallee(trace, scope, call);
if (!calleeType.isError()) {
context.trace.report(CALLEE_NOT_A_FUNCTION.on(calleeExpression, calleeType));
}
return checkArgumentTypesAndFail(context);
}
FunctionDescriptorImpl functionDescriptor =
new ExpressionAsFunctionDescriptor(
context.scope.getContainingDeclaration(),
Name.special("<for expression " + calleeExpression.getText() + ">"),
calleeExpression);
FunctionDescriptorUtil.initializeFromFunctionType(
functionDescriptor,
calleeType,
NO_RECEIVER_PARAMETER,
Modality.FINAL,
Visibilities.LOCAL);
ResolutionCandidate<CallableDescriptor> resolutionCandidate =
ResolutionCandidate.<CallableDescriptor>create(
functionDescriptor, JetPsiUtil.isSafeCall(context.call));
resolutionCandidate.setReceiverArgument(context.call.getExplicitReceiver());
resolutionCandidate.setExplicitReceiverKind(ExplicitReceiverKind.RECEIVER_ARGUMENT);
// strictly speaking, this is a hack:
// we need to pass a reference, but there's no reference in the PSI,
// so we wrap what we have into a fake reference and pass it on (unwrap on the other end)
functionReference = new JetFakeReference(calleeExpression);
prioritizedTasks =
Collections.singletonList(
new ResolutionTask<CallableDescriptor, FunctionDescriptor>(
Collections.singleton(resolutionCandidate), functionReference, context));
} else {
// checkTypesWithNoCallee(trace, scope, call);
return checkArgumentTypesAndFail(context);
}
}
return doResolveCallOrGetCachedResults(
ResolutionResultsCache.FUNCTION_MEMBER_TYPE,
context,
prioritizedTasks,
CallTransformer.FUNCTION_CALL_TRANSFORMER,
functionReference);
}