public static CompletionResultSet addJavaSorting(
final CompletionParameters parameters, CompletionResultSet result) {
final PsiElement position = parameters.getPosition();
final ExpectedTypeInfo[] expectedTypes =
PsiJavaPatterns.psiElement()
.beforeLeaf(PsiJavaPatterns.psiElement().withText("."))
.accepts(position)
? ExpectedTypeInfo.EMPTY_ARRAY
: JavaSmartCompletionContributor.getExpectedTypes(parameters);
final CompletionType type = parameters.getCompletionType();
final boolean smart = type == CompletionType.SMART;
final boolean afterNew = JavaSmartCompletionContributor.AFTER_NEW.accepts(position);
List<LookupElementWeigher> afterProximity = new ArrayList<LookupElementWeigher>();
afterProximity.add(new PreferContainingSameWords(expectedTypes));
if (smart) {
afterProximity.add(new PreferFieldsAndGetters());
}
afterProximity.add(new PreferShorter(expectedTypes));
CompletionSorter sorter = CompletionSorter.defaultSorter(parameters, result.getPrefixMatcher());
if (!smart && afterNew) {
sorter = sorter.weighBefore("liftShorter", new PreferExpected(true, expectedTypes));
} else if (PsiTreeUtil.getParentOfType(position, PsiReferenceList.class) == null) {
sorter =
((CompletionSorterImpl) sorter)
.withClassifier("liftShorterClasses", true, new LiftShorterClasses(position));
}
if (smart) {
sorter =
sorter.weighAfter("priority", new PreferDefaultTypeWeigher(expectedTypes, parameters));
}
List<LookupElementWeigher> afterPrefix = ContainerUtil.newArrayList();
if (!smart) {
ContainerUtil.addIfNotNull(afterPrefix, preferStatics(position, expectedTypes));
}
ContainerUtil.addIfNotNull(afterPrefix, recursion(parameters, expectedTypes));
if (!smart && !afterNew) {
afterPrefix.add(new PreferExpected(false, expectedTypes));
}
Collections.addAll(
afterPrefix,
new PreferByKindWeigher(type, position),
new PreferSimilarlyEnding(expectedTypes),
new PreferNonGeneric(),
new PreferAccessible(position),
new PreferSimple(),
new PreferEnumConstants(parameters));
sorter =
sorter.weighAfter(
"prefix", afterPrefix.toArray(new LookupElementWeigher[afterPrefix.size()]));
sorter =
sorter.weighAfter(
"proximity", afterProximity.toArray(new LookupElementWeigher[afterProximity.size()]));
return result.withRelevanceSorter(sorter);
}
@Override
public void beforeCompletion(@NotNull final CompletionInitializationContext context) {
final PsiFile file = context.getFile();
if (file instanceof PsiJavaFile) {
JavaCompletionUtil.initOffsets(file, context.getOffsetMap());
autoImport(file, context.getStartOffset() - 1, context.getEditor());
if (context.getCompletionType() == CompletionType.BASIC) {
if (semicolonNeeded(context.getEditor(), file, context.getStartOffset())) {
context.setDummyIdentifier(CompletionInitializationContext.DUMMY_IDENTIFIER.trim() + ";");
return;
}
final PsiJavaCodeReferenceElement ref =
PsiTreeUtil.findElementOfClassAtOffset(
file, context.getStartOffset(), PsiJavaCodeReferenceElement.class, false);
if (ref != null && !(ref instanceof PsiReferenceExpression)) {
if (ref.getParent() instanceof PsiTypeElement) {
context.setDummyIdentifier(
CompletionInitializationContext.DUMMY_IDENTIFIER.trim() + ";");
}
if (JavaSmartCompletionContributor.AFTER_NEW.accepts(ref)) {
final PsiReferenceParameterList paramList = ref.getParameterList();
if (paramList != null && paramList.getTextLength() > 0) {
context
.getOffsetMap()
.addOffset(
ConstructorInsertHandler.PARAM_LIST_START,
paramList.getTextRange().getStartOffset());
context
.getOffsetMap()
.addOffset(
ConstructorInsertHandler.PARAM_LIST_END,
paramList.getTextRange().getEndOffset());
}
}
return;
}
final PsiElement element = file.findElementAt(context.getStartOffset());
if (psiElement().inside(PsiAnnotation.class).accepts(element)) {
return;
}
context.setDummyIdentifier(CompletionInitializationContext.DUMMY_IDENTIFIER_TRIMMED);
}
}
}
@Override
public void fillCompletionVariants(
@NotNull final CompletionParameters parameters, @NotNull final CompletionResultSet result) {
final JavaCompletionSession session = new JavaCompletionSession(result);
ResultTracker tracker =
new ResultTracker(result) {
@Override
public void consume(CompletionResult plainResult) {
super.consume(plainResult);
LookupElement element = plainResult.getLookupElement();
Object o = element.getObject();
if (o instanceof PsiClass) {
session.registerClass((PsiClass) o);
}
if (element instanceof TypeArgumentCompletionProvider.TypeArgsLookupElement) {
((TypeArgumentCompletionProvider.TypeArgsLookupElement) element)
.registerSingleClass(session);
}
}
};
result.runRemainingContributors(parameters, tracker);
final boolean empty = tracker.containsOnlyPackages || suggestAllAnnotations(parameters);
if (!empty && parameters.getInvocationCount() == 0) {
result.restartCompletionWhenNothingMatches();
}
if (empty) {
delegate(parameters, JavaCompletionSorting.addJavaSorting(parameters, result), session);
} else if (Registry.is("ide.completion.show.better.matching.classes")) {
if (parameters.getCompletionType() == CompletionType.BASIC
&& parameters.getInvocationCount() <= 1
&& JavaCompletionContributor.mayStartClassName(result)
&& JavaCompletionContributor.isClassNamePossible(parameters)
&& !JavaSmartCompletionContributor.AFTER_NEW.accepts(parameters.getPosition())) {
suggestNonImportedClasses(
parameters,
JavaCompletionSorting.addJavaSorting(
parameters, result.withPrefixMatcher(tracker.betterMatcher)),
session);
}
}
}
@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();
}
@Nullable
public static ElementFilter getReferenceFilter(PsiElement position) {
// Completion after extends in interface, type parameter and implements in class
final PsiClass containingClass =
PsiTreeUtil.getParentOfType(
position,
PsiClass.class,
false,
PsiCodeBlock.class,
PsiMethod.class,
PsiExpressionList.class,
PsiVariable.class,
PsiAnnotation.class);
if (containingClass != null
&& psiElement()
.afterLeaf(PsiKeyword.EXTENDS, PsiKeyword.IMPLEMENTS, ",", "&")
.accepts(position)) {
return new AndFilter(
ElementClassFilter.CLASS, new NotFilter(new AssignableFromContextFilter()));
}
if (ANNOTATION_NAME.accepts(position)) {
return new AnnotationTypeFilter();
}
if (JavaCompletionData.DECLARATION_START.accepts(position)
|| JavaCompletionData.isInsideParameterList(position)
|| psiElement()
.inside(psiElement(PsiJavaCodeReferenceElement.class).withParent(psiAnnotation()))
.accepts(position)) {
return new OrFilter(ElementClassFilter.CLASS, ElementClassFilter.PACKAGE_FILTER);
}
if (psiElement().afterLeaf(PsiKeyword.INSTANCEOF).accepts(position)) {
return new ElementExtractorFilter(ElementClassFilter.CLASS);
}
if (JavaCompletionData.VARIABLE_AFTER_FINAL.accepts(position)) {
return ElementClassFilter.CLASS;
}
if (JavaCompletionData.AFTER_TRY_BLOCK.isAcceptable(position, position)
|| JavaCompletionData.START_SWITCH.accepts(position)
|| JavaCompletionData.isInstanceofPlace(position)
|| JavaCompletionData.isAfterPrimitiveOrArrayType(position)) {
return null;
}
if (JavaCompletionData.START_FOR.accepts(position)) {
return new OrFilter(ElementClassFilter.CLASS, ElementClassFilter.VARIABLE);
}
if (JavaSmartCompletionContributor.AFTER_NEW.accepts(position)) {
return ElementClassFilter.CLASS;
}
if (psiElement().inside(PsiReferenceParameterList.class).accepts(position)) {
return ElementClassFilter.CLASS;
}
if (psiElement().inside(PsiAnnotationParameterList.class).accepts(position)) {
return createAnnotationFilter(position);
}
if (psiElement().afterLeaf("=").inside(PsiVariable.class).accepts(position)) {
return new OrFilter(
new ClassFilter(PsiVariable.class, false),
new ExcludeDeclaredFilter(new ClassFilter(PsiVariable.class)));
}
if (SWITCH_LABEL.accepts(position)) {
return new ClassFilter(PsiField.class) {
@Override
public boolean isAcceptable(Object element, PsiElement context) {
return element instanceof PsiEnumConstant;
}
};
}
return TrueFilter.INSTANCE;
}
public static CompletionResultSet addJavaSorting(
final CompletionParameters parameters, CompletionResultSet result) {
String prefix = result.getPrefixMatcher().getPrefix();
final PsiElement position = parameters.getPosition();
final ExpectedTypeInfo[] expectedTypes =
PsiJavaPatterns.psiElement()
.beforeLeaf(PsiJavaPatterns.psiElement().withText("."))
.accepts(position)
? ExpectedTypeInfo.EMPTY_ARRAY
: JavaSmartCompletionContributor.getExpectedTypes(parameters);
final CompletionType type = parameters.getCompletionType();
final boolean smart = type == CompletionType.SMART;
final boolean afterNew = JavaSmartCompletionContributor.AFTER_NEW.accepts(position);
List<LookupElementWeigher> afterNegativeStats = new ArrayList<LookupElementWeigher>();
if (!smart) {
ContainerUtil.addIfNotNull(afterNegativeStats, preferStatics(position));
}
afterNegativeStats.add(new PreferLocalVariablesLiteralsAndAnnoMethodsWeigher(type, position));
ContainerUtil.addIfNotNull(afterNegativeStats, recursion(parameters, expectedTypes));
if (!smart && !afterNew) {
afterNegativeStats.add(new PreferExpected(false, expectedTypes));
}
afterNegativeStats.add(new PreferSimilarlyEnding(expectedTypes, prefix));
List<LookupElementWeigher> afterProximity = new ArrayList<LookupElementWeigher>();
afterProximity.add(new PreferContainingSameWords(expectedTypes));
if (smart) {
afterProximity.add(new PreferFieldsAndGetters());
}
afterProximity.add(new PreferShorter(expectedTypes, prefix));
CompletionSorter sorter = CompletionSorter.defaultSorter(parameters, result.getPrefixMatcher());
if (!smart && afterNew) {
sorter = sorter.weighBefore("liftShorter", new PreferExpected(true, expectedTypes));
} else {
final ProjectFileIndex fileIndex =
ProjectRootManager.getInstance(position.getProject()).getFileIndex();
sorter =
((CompletionSorterImpl) sorter)
.withClassifier(
"liftShorter",
true,
new ClassifierFactory<LookupElement>("liftShorterClasses") {
@Override
public Classifier<LookupElement> createClassifier(
Classifier<LookupElement> next) {
return new LiftShorterItemsClassifier(
next,
new LiftShorterItemsClassifier.LiftingCondition() {
@Override
public boolean shouldLift(
LookupElement shorterElement,
LookupElement longerElement,
ProcessingContext context) {
if (super.shouldLift(shorterElement, longerElement, context)) {
return true;
}
Object object = shorterElement.getObject();
if (object instanceof PsiClass) {
PsiFile file = ((PsiClass) object).getContainingFile();
if (file != null) {
VirtualFile vFile = file.getOriginalFile().getVirtualFile();
if (vFile != null && fileIndex.isInSource(vFile)) {
return true;
}
}
}
return false;
}
});
}
});
}
if (smart) {
sorter =
sorter.weighBefore(
"negativeStats", new PreferDefaultTypeWeigher(expectedTypes, parameters));
}
sorter =
sorter.weighAfter(
"negativeStats",
afterNegativeStats.toArray(new LookupElementWeigher[afterNegativeStats.size()]));
sorter =
sorter.weighAfter(
"prefix",
new PreferNonGeneric(),
new PreferAccessible(position),
new PreferSimple(),
new PreferEnumConstants(parameters));
sorter =
sorter.weighAfter(
"proximity", afterProximity.toArray(new LookupElementWeigher[afterProximity.size()]));
return result.withRelevanceSorter(sorter);
}