| /* |
| * Copyright 2000-2010 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 com.intellij.usages; |
| |
| import com.intellij.openapi.extensions.ExtensionPointName; |
| import com.intellij.psi.PsiElement; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * Used to provide appropriate psiElements from usages in Find Usages popup. |
| * For instance, it's used in Find Usages popup to help ShowImplementationsAction show |
| * psiElement containing a usage |
| * |
| * @author Konstantin Bulenkov |
| */ |
| public abstract class UsageToPsiElementProvider { |
| public static final ExtensionPointName<UsageToPsiElementProvider> EP_NAME = new ExtensionPointName<UsageToPsiElementProvider>("com.intellij.usageToPsiElementProvider"); |
| |
| @Nullable |
| public abstract PsiElement getAppropriateParentFrom(PsiElement element); |
| |
| @Nullable |
| public static PsiElement findAppropriateParentFrom(@NotNull PsiElement element) { |
| for (UsageToPsiElementProvider provider : EP_NAME.getExtensions()) { |
| final PsiElement parent = provider.getAppropriateParentFrom(element); |
| if (parent != null) { |
| return parent; |
| } |
| } |
| return null; |
| } |
| } |