@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);
}
}