@Nullable
public static String getReferencePrefix(@NotNull PsiElement insertedElement, int offsetInFile) {
final PsiReference ref = insertedElement.getContainingFile().findReferenceAt(offsetInFile);
if (ref != null) {
final PsiElement element = ref.getElement();
final int endIndex = offsetInFile - element.getTextRange().getStartOffset();
final int beginIndex = ref.getRangeInElement().getStartOffset();
if (beginIndex > endIndex) {
LOG.error(
"Inconsistent reference (found at offset not included in its range): ref="
+ ref
+ " element="
+ element
+ " text="
+ element.getText());
}
if (beginIndex < 0) {
LOG.error(
"Inconsistent reference (begin < 0): ref="
+ ref
+ " element="
+ element
+ "; begin="
+ beginIndex
+ " text="
+ element.getText());
}
LOG.assertTrue(endIndex >= 0);
return element.getText().substring(beginIndex, endIndex);
}
return null;
}
@Nullable
static PsiElement resolveReference(final PsiReference psiReference) {
if (psiReference instanceof PsiPolyVariantReference) {
final ResolveResult[] results = ((PsiPolyVariantReference) psiReference).multiResolve(true);
if (results.length == 1) return results[0].getElement();
}
return psiReference.resolve();
}
// need to shorten references in type argument list
public static void shortenReference(final PsiFile file, final int offset)
throws IncorrectOperationException {
Project project = file.getProject();
final PsiDocumentManager manager = PsiDocumentManager.getInstance(project);
Document document = manager.getDocument(file);
if (document == null) {
PsiUtilCore.ensureValid(file);
LOG.error("No document for " + file);
return;
}
manager.commitDocument(document);
final PsiReference ref = file.findReferenceAt(offset);
if (ref != null) {
PsiElement element = ref.getElement();
if (element != null) {
JavaCodeStyleManager.getInstance(project).shortenClassReferences(element);
PsiDocumentManager.getInstance(project).doPostponedOperationsAndUnblockDocument(document);
}
}
}
protected void completeReference(
final PsiReference reference,
final PsiElement position,
final Set<LookupElement> set,
final TailType tailType,
final PsiFile file,
final ElementFilter filter,
final CompletionVariant variant) {
if (reference instanceof PsiMultiReference) {
for (PsiReference ref : getReferences((PsiMultiReference) reference)) {
completeReference(ref, position, set, tailType, file, filter, variant);
}
} else if (reference instanceof PsiDynaReference) {
for (PsiReference ref : ((PsiDynaReference<?>) reference).getReferences()) {
completeReference(ref, position, set, tailType, file, filter, variant);
}
} else {
final Object[] completions = reference.getVariants();
if (completions == null) return;
for (Object completion : completions) {
if (completion == null) {
LOG.assertTrue(
false,
"Position="
+ position
+ "\n;Reference="
+ reference
+ "\n;variants="
+ Arrays.toString(completions));
}
if (completion instanceof PsiElement) {
final PsiElement psiElement = (PsiElement) completion;
if (filter.isClassAcceptable(psiElement.getClass())
&& filter.isAcceptable(psiElement, position)) {
addLookupItem(set, tailType, completion, file, variant);
}
} else {
if (completion instanceof LookupItem) {
final Object o = ((LookupItem) completion).getObject();
if (o instanceof PsiElement) {
if (!filter.isClassAcceptable(o.getClass()) || !filter.isAcceptable(o, position))
continue;
}
}
addLookupItem(set, tailType, completion, file, variant);
}
}
}
}
@Override
public void fillCompletionVariants(
final CompletionParameters parameters, final CompletionResultSet _result) {
if (parameters.getCompletionType() != CompletionType.BASIC) {
return;
}
final PsiElement position = parameters.getPosition();
if (!isInJavaContext(position)) {
return;
}
if (AFTER_NUMBER_LITERAL.accepts(position)
|| UNEXPECTED_REFERENCE_AFTER_DOT.accepts(position)) {
_result.stopHere();
return;
}
final CompletionResultSet result = JavaCompletionSorting.addJavaSorting(parameters, _result);
if (ANNOTATION_ATTRIBUTE_NAME.accepts(position)
&& !JavaCompletionData.isAfterPrimitiveOrArrayType(position)) {
JavaCompletionData.addExpectedTypeMembers(parameters, result);
completeAnnotationAttributeName(result, position, parameters);
result.stopHere();
return;
}
final InheritorsHolder inheritors = new InheritorsHolder(position, result);
if (JavaSmartCompletionContributor.IN_TYPE_ARGS.accepts(position)) {
new TypeArgumentCompletionProvider(false, inheritors)
.addCompletions(parameters, new ProcessingContext(), result);
}
PrefixMatcher matcher = result.getPrefixMatcher();
if (JavaSmartCompletionContributor.AFTER_NEW.accepts(position)) {
new JavaInheritorsGetter(ConstructorInsertHandler.BASIC_INSTANCE)
.generateVariants(parameters, matcher, inheritors);
}
if (IMPORT_REFERENCE.accepts(position)) {
result.addElement(LookupElementBuilder.create("*"));
}
addKeywords(parameters, result);
Set<String> usedWords = addReferenceVariants(parameters, result, inheritors);
if (psiElement().inside(PsiLiteralExpression.class).accepts(position)) {
PsiReference reference = position.getContainingFile().findReferenceAt(parameters.getOffset());
if (reference == null || reference.isSoft()) {
WordCompletionContributor.addWordCompletionVariants(result, parameters, usedWords);
}
}
JavaGenerateMemberCompletionContributor.fillCompletionVariants(parameters, result);
addAllClasses(parameters, result, inheritors);
final PsiElement parent = position.getParent();
if (parent instanceof PsiReferenceExpression
&& !((PsiReferenceExpression) parent).isQualified()
&& parameters.isExtendedCompletion()
&& StringUtil.isNotEmpty(matcher.getPrefix())) {
new JavaStaticMemberProcessor(parameters).processStaticMethodsGlobally(matcher, result);
}
result.stopHere();
}
public static int insertClassReference(
PsiClass psiClass, PsiFile file, int startOffset, int endOffset) {
final Project project = file.getProject();
PsiDocumentManager documentManager = PsiDocumentManager.getInstance(project);
documentManager.commitAllDocuments();
final PsiManager manager = file.getManager();
final Document document =
FileDocumentManager.getInstance().getDocument(file.getViewProvider().getVirtualFile());
final PsiReference reference = file.findReferenceAt(startOffset);
if (reference != null) {
final PsiElement resolved = reference.resolve();
if (resolved instanceof PsiClass) {
if (((PsiClass) resolved).getQualifiedName() == null
|| manager.areElementsEquivalent(psiClass, resolved)) {
return endOffset;
}
}
}
String name = psiClass.getName();
if (name == null) {
return endOffset;
}
assert document != null;
document.replaceString(startOffset, endOffset, name);
int newEndOffset = startOffset + name.length();
final RangeMarker toDelete = insertTemporary(newEndOffset, document, " ");
documentManager.commitAllDocuments();
PsiElement element = file.findElementAt(startOffset);
if (element instanceof PsiIdentifier) {
PsiElement parent = element.getParent();
if (parent instanceof PsiJavaCodeReferenceElement
&& !((PsiJavaCodeReferenceElement) parent).isQualified()
&& !(parent.getParent() instanceof PsiPackageStatement)) {
PsiJavaCodeReferenceElement ref = (PsiJavaCodeReferenceElement) parent;
if (psiClass.isValid()
&& !psiClass.getManager().areElementsEquivalent(psiClass, resolveReference(ref))) {
final boolean staticImport = ref instanceof PsiImportStaticReferenceElement;
PsiElement newElement;
try {
newElement =
staticImport
? ((PsiImportStaticReferenceElement) ref).bindToTargetClass(psiClass)
: ref.bindToElement(psiClass);
} catch (IncorrectOperationException e) {
return endOffset; // can happen if fqn contains reserved words, for example
}
final RangeMarker rangeMarker = document.createRangeMarker(newElement.getTextRange());
documentManager.doPostponedOperationsAndUnblockDocument(document);
documentManager.commitDocument(document);
newElement =
CodeInsightUtilCore.findElementInRange(
file,
rangeMarker.getStartOffset(),
rangeMarker.getEndOffset(),
PsiJavaCodeReferenceElement.class,
JavaLanguage.INSTANCE);
rangeMarker.dispose();
if (newElement != null) {
newEndOffset = newElement.getTextRange().getEndOffset();
if (!(newElement instanceof PsiReferenceExpression)) {
PsiReferenceParameterList parameterList =
((PsiJavaCodeReferenceElement) newElement).getParameterList();
if (parameterList != null) {
newEndOffset = parameterList.getTextRange().getStartOffset();
}
}
if (!staticImport
&& !psiClass
.getManager()
.areElementsEquivalent(psiClass, resolveReference((PsiReference) newElement))
&& !PsiUtil.isInnerClass(psiClass)) {
final String qName = psiClass.getQualifiedName();
if (qName != null) {
document.replaceString(
newElement.getTextRange().getStartOffset(), newEndOffset, qName);
newEndOffset = newElement.getTextRange().getStartOffset() + qName.length();
}
}
}
}
}
}
if (toDelete.isValid()) {
document.deleteString(toDelete.getStartOffset(), toDelete.getEndOffset());
}
return newEndOffset;
}