| /* |
| * Copyright 2000-2009 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.Disposable; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.psi.*; |
| import com.intellij.util.containers.ContainerUtil; |
| import org.jetbrains.annotations.NotNull; |
| |
| import java.util.List; |
| |
| /** |
| * @author max |
| */ |
| public class UsageModelTracker implements Disposable { |
| public interface UsageModelTrackerListener { |
| void modelChanged(boolean isPropertyChange); |
| } |
| |
| private final List<UsageModelTrackerListener> myListeners = ContainerUtil.createLockFreeCopyOnWriteList(); |
| |
| public UsageModelTracker(Project project) { |
| final PsiTreeChangeListener myPsiListener = new PsiTreeChangeAdapter() { |
| @Override |
| public void childAdded(@NotNull PsiTreeChangeEvent event) { |
| doFire(event, false); |
| } |
| |
| @Override |
| public void childRemoved(@NotNull PsiTreeChangeEvent event) { |
| doFire(event, false); |
| } |
| |
| @Override |
| public void childReplaced(@NotNull PsiTreeChangeEvent event) { |
| doFire(event, false); |
| } |
| |
| @Override |
| public void childrenChanged(@NotNull PsiTreeChangeEvent event) { |
| doFire(event, false); |
| } |
| |
| @Override |
| public void childMoved(@NotNull PsiTreeChangeEvent event) { |
| doFire(event, false); |
| } |
| |
| @Override |
| public void propertyChanged(@NotNull PsiTreeChangeEvent event) { |
| doFire(event, true); |
| } |
| }; |
| PsiManager.getInstance(project).addPsiTreeChangeListener(myPsiListener, this); |
| } |
| |
| private void doFire(final PsiTreeChangeEvent event, boolean propertyChange) { |
| if (!(event.getFile() instanceof PsiCodeFragment)) { |
| for (UsageModelTrackerListener listener : myListeners) { |
| listener.modelChanged(propertyChange); |
| } |
| } |
| } |
| |
| @Override |
| public void dispose() { |
| } |
| |
| public void addListener(UsageModelTrackerListener listener) { |
| myListeners.add(listener); |
| } |
| |
| public void removeListener(UsageModelTrackerListener listener) { |
| myListeners.remove(listener); |
| } |
| } |