| /* |
| * Copyright 2000-2011 JetBrains s.r.o. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.jetbrains.plugins.groovy.lang.completion; |
| |
| import com.intellij.codeInsight.completion.*; |
| import com.intellij.codeInsight.completion.impl.BetterPrefixMatcher; |
| import com.intellij.codeInsight.completion.impl.CamelHumpMatcher; |
| import com.intellij.codeInsight.lookup.AutoCompletionPolicy; |
| import com.intellij.codeInsight.lookup.LookupElement; |
| import com.intellij.openapi.util.registry.Registry; |
| import com.intellij.psi.*; |
| import com.intellij.psi.search.PsiShortNamesCache; |
| import com.intellij.util.Consumer; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.plugins.groovy.lang.psi.GrReferenceElement; |
| import org.jetbrains.plugins.groovy.lang.psi.GroovyPsiElementFactory; |
| import org.jetbrains.plugins.groovy.lang.psi.api.auxiliary.modifiers.GrModifierList; |
| import org.jetbrains.plugins.groovy.lang.psi.api.auxiliary.modifiers.annotation.GrAnnotation; |
| import org.jetbrains.plugins.groovy.lang.psi.api.statements.typedef.GrAnnotationTypeDefinition; |
| import org.jetbrains.plugins.groovy.lang.psi.api.types.GrCodeReferenceElement; |
| |
| import java.util.Collections; |
| import java.util.LinkedHashSet; |
| import java.util.Set; |
| |
| import static com.intellij.patterns.PsiJavaPatterns.psiElement; |
| |
| /** |
| * @author peter |
| */ |
| public class GroovyNoVariantsDelegator extends CompletionContributor { |
| |
| private static boolean suggestMetaAnnotations(CompletionParameters parameters) { |
| PsiElement position = parameters.getPosition(); |
| return psiElement().withParents(GrCodeReferenceElement.class, GrAnnotation.class, GrModifierList.class, GrAnnotationTypeDefinition.class).accepts(position); |
| } |
| |
| @Override |
| public void fillCompletionVariants(final CompletionParameters parameters, CompletionResultSet result) { |
| LinkedHashSet<CompletionResult> plainResults = result.runRemainingContributors(parameters, true); |
| final boolean empty = JavaNoVariantsDelegator.containsOnlyPackages(plainResults) || suggestMetaAnnotations(parameters); |
| |
| if (!empty && parameters.getInvocationCount() == 0) { |
| result.restartCompletionWhenNothingMatches(); |
| } |
| |
| if (empty) { |
| delegate(parameters, result); |
| } else if (Registry.is("ide.completion.show.better.matching.classes")) { |
| if (parameters.getCompletionType() == CompletionType.BASIC && |
| parameters.getInvocationCount() <= 1 && |
| JavaCompletionContributor.mayStartClassName(result) && |
| GroovyCompletionContributor.isClassNamePossible(parameters.getPosition()) && |
| !MapArgumentCompletionProvider.isMapKeyCompletion(parameters) && |
| !GroovySmartCompletionContributor.AFTER_NEW.accepts(parameters.getPosition())) { |
| result = result.withPrefixMatcher(new BetterPrefixMatcher(result.getPrefixMatcher(), BetterPrefixMatcher.getBestMatchingDegree(plainResults))); |
| suggestNonImportedClasses(parameters, result); |
| } |
| } |
| } |
| |
| private static void delegate(CompletionParameters parameters, CompletionResultSet result) { |
| if (parameters.getCompletionType() == CompletionType.BASIC) { |
| if (parameters.getInvocationCount() <= 1 && |
| JavaCompletionContributor.mayStartClassName(result) && |
| GroovyCompletionContributor.isClassNamePossible(parameters.getPosition()) && |
| !MapArgumentCompletionProvider.isMapKeyCompletion(parameters)) { |
| suggestNonImportedClasses(parameters, result); |
| } |
| |
| suggestChainedCalls(parameters, result); |
| } |
| } |
| |
| private static void suggestNonImportedClasses(CompletionParameters parameters, final CompletionResultSet result) { |
| GroovyCompletionContributor.addAllClasses(parameters, new Consumer<LookupElement>() { |
| @Override |
| public void consume(LookupElement element) { |
| JavaPsiClassReferenceElement classElement = |
| element.as(JavaPsiClassReferenceElement.CLASS_CONDITION_KEY); |
| if (classElement != null) { |
| classElement.setAutoCompletionPolicy(AutoCompletionPolicy.NEVER_AUTOCOMPLETE); |
| } |
| result.addElement(element); |
| } |
| }, new InheritorsHolder(parameters.getPosition(), result), result.getPrefixMatcher()); |
| } |
| |
| private static void suggestChainedCalls(CompletionParameters parameters, CompletionResultSet result) { |
| PsiElement position = parameters.getPosition(); |
| PsiElement parent = position.getParent(); |
| if (!(parent instanceof GrReferenceElement)) { |
| return; |
| } |
| PsiElement qualifier = ((GrReferenceElement)parent).getQualifier(); |
| if (!(qualifier instanceof GrReferenceElement) || |
| ((GrReferenceElement)qualifier).getQualifier() != null) { |
| return; |
| } |
| PsiElement target = ((GrReferenceElement)qualifier).resolve(); |
| if (target != null && !(target instanceof PsiPackage)) { |
| return; |
| } |
| |
| String fullPrefix = position.getContainingFile().getText().substring(parent.getTextRange().getStartOffset(), parameters.getOffset()); |
| final CompletionResultSet qualifiedCollector = result.withPrefixMatcher(fullPrefix); |
| InheritorsHolder inheritors = new InheritorsHolder(position, result); |
| for (final LookupElement base : suggestQualifierItems(parameters, (GrReferenceElement)qualifier, inheritors)) { |
| final PsiType type = JavaCompletionUtil.getLookupElementType(base); |
| if (type != null && !PsiType.VOID.equals(type)) { |
| GrReferenceElement ref = createMockReference(position, type, base); |
| PsiElement refName = ref.getReferenceNameElement(); |
| assert refName != null; |
| CompletionParameters newParams = parameters.withPosition(refName, refName.getTextRange().getStartOffset()); |
| GroovyCompletionContributor.completeReference(newParams, ref, inheritors, result.getPrefixMatcher(), new Consumer<LookupElement>() { |
| @Override |
| public void consume(LookupElement element) { |
| qualifiedCollector.addElement(new JavaChainLookupElement(base, element) { |
| @Override |
| protected boolean shouldParenthesizeQualifier(PsiFile file, int startOffset, int endOffset) { |
| return false; |
| } |
| }); |
| } |
| }); |
| } |
| } |
| } |
| |
| private static GrReferenceElement createMockReference(final PsiElement place, @NotNull PsiType qualifierType, LookupElement qualifierItem) { |
| GroovyPsiElementFactory factory = GroovyPsiElementFactory.getInstance(place.getProject()); |
| if (qualifierItem.getObject() instanceof PsiClass) { |
| return factory |
| .createReferenceExpressionFromText(((PsiClass)qualifierItem.getObject()).getQualifiedName() + ".xxx", place); |
| } |
| |
| return factory.createReferenceExpressionFromText("xxx.xxx", |
| JavaCompletionUtil |
| .createContextWithXxxVariable(place, qualifierType)); |
| } |
| |
| |
| private static Set<LookupElement> suggestQualifierItems(CompletionParameters _parameters, |
| GrReferenceElement qualifier, |
| InheritorsHolder inheritors) { |
| CompletionParameters parameters = |
| _parameters.withPosition(qualifier.getReferenceNameElement(), qualifier.getTextRange().getEndOffset()); |
| String referenceName = qualifier.getReferenceName(); |
| if (referenceName == null) { |
| return Collections.emptySet(); |
| } |
| |
| final PrefixMatcher qMatcher = new CamelHumpMatcher(referenceName); |
| final Set<LookupElement> variants = new LinkedHashSet<LookupElement>(); |
| GroovyCompletionContributor.completeReference(parameters, qualifier, inheritors, qMatcher, new Consumer<LookupElement>() { |
| @Override |
| public void consume(LookupElement element) { |
| if (qMatcher.prefixMatches(element)) { |
| variants.add(element); |
| } |
| } |
| }); |
| |
| for (PsiClass aClass : PsiShortNamesCache.getInstance(qualifier.getProject()).getClassesByName(referenceName, qualifier.getResolveScope())) { |
| variants.add(GroovyCompletionUtil.createClassLookupItem(aClass)); |
| } |
| |
| |
| if (variants.isEmpty()) { |
| GroovyCompletionContributor.addAllClasses(parameters, new Consumer<LookupElement>() { |
| @Override |
| public void consume(LookupElement element) { |
| if (qMatcher.prefixMatches(element)) { |
| variants.add(element); |
| } |
| } |
| }, inheritors, qMatcher); |
| } |
| return variants; |
| } |
| |
| |
| } |