| /* |
| * Copyright 2000-2014 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.weighers; |
| |
| import com.intellij.codeInsight.completion.CompletionLocation; |
| import com.intellij.codeInsight.completion.CompletionWeigher; |
| import com.intellij.codeInsight.lookup.LookupElement; |
| import com.intellij.codeInsight.lookup.PsiTypeLookupItem; |
| import com.intellij.psi.*; |
| import com.intellij.psi.impl.PsiImplUtil; |
| import com.intellij.psi.impl.light.LightElement; |
| import com.intellij.psi.util.InheritanceUtil; |
| import com.intellij.psi.util.PsiTreeUtil; |
| import com.intellij.util.containers.ContainerUtil; |
| import com.intellij.util.containers.hash.HashSet; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.plugins.groovy.extensions.NamedArgumentDescriptor; |
| import org.jetbrains.plugins.groovy.lang.completion.GrMainCompletionProvider; |
| import org.jetbrains.plugins.groovy.lang.completion.GrPropertyForCompletion; |
| import org.jetbrains.plugins.groovy.lang.psi.GrReferenceElement; |
| import org.jetbrains.plugins.groovy.lang.psi.GroovyFileBase; |
| import org.jetbrains.plugins.groovy.lang.psi.api.auxiliary.modifiers.annotation.GrAnnotation; |
| import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrExpression; |
| import org.jetbrains.plugins.groovy.lang.psi.api.statements.typedef.members.GrAccessorMethod; |
| import org.jetbrains.plugins.groovy.lang.psi.impl.auxiliary.annotation.GrAnnotationImpl; |
| import org.jetbrains.plugins.groovy.lang.psi.util.GroovyCommonClassNames; |
| import org.jetbrains.plugins.groovy.lang.psi.util.GroovyPropertyUtils; |
| |
| import java.util.Set; |
| |
| /** |
| * @author Maxim.Medvedev |
| */ |
| public class GrKindWeigher extends CompletionWeigher { |
| private static final Set<String> TRASH_CLASSES = new HashSet<String>(10); |
| private static final Set<String> PRIORITY_KEYWORDS = ContainerUtil.newHashSet( |
| PsiKeyword.RETURN, PsiKeyword.INSTANCEOF, "in", |
| PsiKeyword.PRIVATE, PsiKeyword.PROTECTED, PsiKeyword.PUBLIC, PsiKeyword.STATIC, "def", |
| PsiKeyword.TRUE, PsiKeyword.FALSE, PsiKeyword.NULL); |
| |
| static { |
| TRASH_CLASSES.add(CommonClassNames.JAVA_LANG_CLASS); |
| TRASH_CLASSES.add(CommonClassNames.JAVA_LANG_OBJECT); |
| TRASH_CLASSES.add(GroovyCommonClassNames.GROOVY_OBJECT_SUPPORT); |
| } |
| |
| @Override |
| public Comparable weigh(@NotNull LookupElement element, @NotNull CompletionLocation location) { |
| final PsiElement position = location.getCompletionParameters().getPosition(); |
| if (!(position.getContainingFile() instanceof GroovyFileBase)) return null; |
| |
| Object o = element.getObject(); |
| if (o instanceof ResolveResult) { |
| o = ((ResolveResult)o).getElement(); |
| } |
| |
| final PsiElement parent = position.getParent(); |
| final PsiElement qualifier = parent instanceof GrReferenceElement ? ((GrReferenceElement)parent).getQualifier() : null; |
| if (qualifier == null) { |
| if (o instanceof NamedArgumentDescriptor) { |
| switch (((NamedArgumentDescriptor)o).getPriority()) { |
| case ALWAYS_ON_TOP: |
| return NotQualifiedKind.onTop; |
| case AS_LOCAL_VARIABLE: |
| return NotQualifiedKind.local; |
| default: |
| return NotQualifiedKind.unknown; |
| } |
| } |
| if (o instanceof PsiVariable && !(o instanceof PsiField)) { |
| return NotQualifiedKind.local; |
| } |
| |
| PsiTypeLookupItem item = element.as(PsiTypeLookupItem.CLASS_CONDITION_KEY); |
| if (item != null && item.getBracketsCount() > 0) { |
| return NotQualifiedKind.arrayType; |
| } |
| |
| if (isPriorityKeyword(o)) return NotQualifiedKind.local; |
| if (isLightElement(o)) return NotQualifiedKind.unknown; |
| if (o instanceof PsiClass) { |
| if (((PsiClass)o).isAnnotationType() && GrMainCompletionProvider.AFTER_AT.accepts(position)) { |
| final GrAnnotation annotation = PsiTreeUtil.getParentOfType(position, GrAnnotation.class); |
| if (annotation != null) { |
| PsiElement annoParent = annotation.getParent(); |
| PsiElement ownerToUse = annoParent instanceof PsiModifierList ? annoParent.getParent() : annoParent; |
| PsiAnnotation.TargetType[] elementTypeFields = GrAnnotationImpl.getApplicableElementTypeFields(ownerToUse); |
| if (PsiImplUtil.findApplicableTarget((PsiClass)o, elementTypeFields) != null) { |
| return NotQualifiedKind.restrictedClass; |
| } |
| } |
| } |
| if (GrMainCompletionProvider.IN_CATCH_TYPE.accepts(position) && |
| InheritanceUtil.isInheritor((PsiClass)o, CommonClassNames.JAVA_LANG_THROWABLE)) { |
| return NotQualifiedKind.restrictedClass; |
| } |
| } |
| if (o instanceof PsiMember) { |
| final PsiClass containingClass = ((PsiMember)o).getContainingClass(); |
| if (isAccessor((PsiMember)o)) return NotQualifiedKind.accessor; |
| if (o instanceof PsiClass && ((PsiClass)o).getContainingClass() == null || o instanceof PsiPackage) return NotQualifiedKind.unknown; |
| if (o instanceof PsiClass) return NotQualifiedKind.innerClass; |
| if (PsiTreeUtil.isContextAncestor(containingClass, position, false)) return NotQualifiedKind.currentClassMember; |
| return NotQualifiedKind.member; |
| } |
| return NotQualifiedKind.unknown; |
| } |
| else { |
| if (o instanceof PsiEnumConstant) return QualifiedKind.enumConstant; |
| |
| if (isLightElement(o)) return QualifiedKind.unknown; |
| if (o instanceof PsiMember) { |
| if (isTrashMethod((PsiMember)o)) return QualifiedKind.unknown; |
| if (isAccessor((PsiMember)o)) return QualifiedKind.accessor; |
| if (isQualifierClassMember((PsiMember)o, qualifier)) { |
| return QualifiedKind.currentClassMember; |
| } |
| if (o instanceof PsiClass && ((PsiClass)o).getContainingClass() == null || o instanceof PsiPackage) return QualifiedKind.unknown; |
| if (o instanceof PsiClass) return QualifiedKind.innerClass; |
| return QualifiedKind.member; |
| } |
| return QualifiedKind.unknown; |
| } |
| } |
| |
| private static boolean isPriorityKeyword(Object o) { |
| //noinspection SuspiciousMethodCalls |
| return PRIORITY_KEYWORDS.contains(o); |
| } |
| |
| private static boolean isLightElement(Object o) { |
| return o instanceof LightElement && !(o instanceof GrPropertyForCompletion) && !(o instanceof GrAccessorMethod); |
| } |
| |
| private static boolean isTrashMethod(PsiMember o) { |
| final PsiClass containingClass = o.getContainingClass(); |
| return containingClass != null && TRASH_CLASSES.contains(containingClass.getQualifiedName()); |
| } |
| |
| private static boolean isAccessor(PsiMember member) { |
| return member instanceof PsiMethod && (GroovyPropertyUtils.isSimplePropertyAccessor((PsiMethod)member) || "setProperty".equals(((PsiMethod)member).getName())); |
| } |
| |
| |
| private static boolean isQualifierClassMember(PsiMember member, PsiElement qualifier) { |
| if (!(qualifier instanceof GrExpression)) return false; |
| |
| final PsiType type = ((GrExpression)qualifier).getType(); |
| if (!(type instanceof PsiClassType)) return false; |
| |
| final PsiClass psiClass = ((PsiClassType)type).resolve(); |
| if (psiClass == null) return false; |
| |
| return qualifier.getManager().areElementsEquivalent(member.getContainingClass(), psiClass); |
| } |
| |
| private enum NotQualifiedKind { |
| arrayType, |
| innerClass, |
| unknown, |
| accessor, |
| member, |
| currentClassMember, |
| restrictedClass, |
| local, |
| onTop |
| } |
| |
| private enum QualifiedKind { |
| innerClass, |
| unknown, |
| accessor, |
| member, |
| currentClassMember, |
| enumConstant, |
| } |
| } |