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/*
* 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.ide.projectView;
import com.intellij.ide.util.treeView.AbstractTreeUpdater;
import com.intellij.openapi.fileTypes.FileTypes;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.psi.*;
import com.intellij.psi.util.PsiModificationTracker;
import org.jetbrains.annotations.NotNull;
import javax.swing.tree.DefaultMutableTreeNode;
public abstract class ProjectViewPsiTreeChangeListener extends PsiTreeChangeAdapter {
private final PsiModificationTracker myModificationTracker;
private long myOutOfCodeBlockModificationCount;
protected ProjectViewPsiTreeChangeListener(@NotNull Project project) {
myModificationTracker = PsiManager.getInstance(project).getModificationTracker();
myOutOfCodeBlockModificationCount = myModificationTracker.getOutOfCodeBlockModificationCount();
}
protected abstract AbstractTreeUpdater getUpdater();
protected abstract boolean isFlattenPackages();
protected abstract DefaultMutableTreeNode getRootNode();
@Override
public final void childRemoved(@NotNull PsiTreeChangeEvent event) {
PsiElement child = event.getOldChild();
if (child instanceof PsiWhiteSpace) return; //optimization
childrenChanged(event.getParent(), true);
}
@Override
public final void childAdded(@NotNull PsiTreeChangeEvent event) {
PsiElement child = event.getNewChild();
if (child instanceof PsiWhiteSpace) return; //optimization
childrenChanged(event.getParent(), true);
}
@Override
public final void childReplaced(@NotNull PsiTreeChangeEvent event) {
PsiElement oldChild = event.getOldChild();
PsiElement newChild = event.getNewChild();
if (oldChild instanceof PsiWhiteSpace && newChild instanceof PsiWhiteSpace) return; //optimization
childrenChanged(event.getParent(), true);
}
@Override
public final void childMoved(@NotNull PsiTreeChangeEvent event) {
childrenChanged(event.getOldParent(), false);
childrenChanged(event.getNewParent(), true);
}
@Override
public final void childrenChanged(@NotNull PsiTreeChangeEvent event) {
childrenChanged(event.getParent(), true);
}
protected void childrenChanged(PsiElement parent, final boolean stopProcessingForThisModificationCount) {
if (parent instanceof PsiDirectory && isFlattenPackages()){
getUpdater().addSubtreeToUpdate(getRootNode());
return;
}
long newModificationCount = myModificationTracker.getOutOfCodeBlockModificationCount();
if (newModificationCount == myOutOfCodeBlockModificationCount) return;
if (stopProcessingForThisModificationCount) {
myOutOfCodeBlockModificationCount = newModificationCount;
}
while (true) {
if (parent == null) break;
if (parent instanceof PsiFile) {
VirtualFile virtualFile = ((PsiFile)parent).getVirtualFile();
if (virtualFile != null && virtualFile.getFileType() != FileTypes.PLAIN_TEXT) {
// adding a class within a file causes a new node to appear in project view => entire dir should be updated
parent = ((PsiFile)parent).getContainingDirectory();
if (parent == null) break;
}
}
if (getUpdater().addSubtreeToUpdateByElement(parent)) {
break;
}
if (parent instanceof PsiFile || parent instanceof PsiDirectory) break;
parent = parent.getParent();
}
}
@Override
public void propertyChanged(@NotNull PsiTreeChangeEvent event) {
String propertyName = event.getPropertyName();
PsiElement element = event.getElement();
DefaultMutableTreeNode rootNode = getRootNode();
AbstractTreeUpdater updater = getUpdater();
if (propertyName.equals(PsiTreeChangeEvent.PROP_ROOTS)) {
updater.addSubtreeToUpdate(rootNode);
}
else if (propertyName.equals(PsiTreeChangeEvent.PROP_WRITABLE)){
if (!updater.addSubtreeToUpdateByElement(element) && element instanceof PsiFile) {
updater.addSubtreeToUpdateByElement(((PsiFile)element).getContainingDirectory());
}
}
else if (propertyName.equals(PsiTreeChangeEvent.PROP_FILE_NAME) || propertyName.equals(PsiTreeChangeEvent.PROP_DIRECTORY_NAME)){
if (element instanceof PsiDirectory && isFlattenPackages()){
updater.addSubtreeToUpdate(rootNode);
return;
}
final PsiElement parent = element.getParent();
if (parent == null || !updater.addSubtreeToUpdateByElement(parent)) {
updater.addSubtreeToUpdateByElement(element);
}
}
else if (propertyName.equals(PsiTreeChangeEvent.PROP_FILE_TYPES)){
updater.addSubtreeToUpdate(rootNode);
}
}
}
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