/*
* Copyright 2000-2015 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.diff.tools.util.base;
import com.intellij.diff.DiffContext;
import com.intellij.diff.contents.DiffContent;
import com.intellij.diff.contents.DocumentContent;
import com.intellij.diff.contents.FileContent;
import com.intellij.diff.requests.ContentDiffRequest;
import com.intellij.openapi.editor.Document;
import com.intellij.openapi.editor.event.DocumentAdapter;
import com.intellij.openapi.editor.event.DocumentEvent;
import com.intellij.openapi.editor.event.DocumentListener;
import com.intellij.openapi.vfs.*;
import com.intellij.util.containers.HashSet;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import consulo.annotations.RequiredDispatchThread;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
public abstract class ListenerDiffViewerBase extends DiffViewerBase {
@NotNull private final DocumentListener myDocumentListener;
@Nullable private final VirtualFileListener myFileListener;
public ListenerDiffViewerBase(@NotNull DiffContext context, @NotNull ContentDiffRequest request) {
super(context, request);
myDocumentListener = createDocumentListener();
myFileListener = createFileListener(request);
if (myFileListener != null) VirtualFileManager.getInstance().addVirtualFileListener(myFileListener);
for (Document document : getDocuments()) {
document.addDocumentListener(myDocumentListener);
}
}
@Override
protected void onDispose() {
if (myFileListener != null) VirtualFileManager.getInstance().removeVirtualFileListener(myFileListener);
for (Document document : getDocuments()) {
document.removeDocumentListener(myDocumentListener);
}
super.onDispose();
}
@NotNull
protected DocumentListener createDocumentListener() {
return new DocumentAdapter() {
@Override
public void beforeDocumentChange(DocumentEvent event) {
onBeforeDocumentChange(event);
}
@Override
public void documentChanged(DocumentEvent event) {
onDocumentChange(event);
}
};
}
@Nullable
protected VirtualFileListener createFileListener(@NotNull ContentDiffRequest request) {
final List<VirtualFile> files = new ArrayList<VirtualFile>(0);
for (DiffContent content : request.getContents()) {
if (content instanceof FileContent && !(content instanceof DocumentContent)) {
files.add(((FileContent)content).getFile());
}
}
if (files.isEmpty()) return null;
return new VirtualFileAdapter() {
@Override
public void contentsChanged(@NotNull VirtualFileEvent event) {
if (files.contains(event.getFile())) {
onFileChange(event);
}
}
@Override
public void propertyChanged(@NotNull VirtualFilePropertyEvent event) {
if (files.contains(event.getFile())) {
onFileChange(event);
}
}
};
}
//
// Abstract
//
@RequiredDispatchThread
protected void onDocumentChange(@NotNull DocumentEvent event) {
scheduleRediff();
}
@RequiredDispatchThread
protected void onBeforeDocumentChange(@NotNull DocumentEvent event) {
}
@RequiredDispatchThread
protected void onFileChange(@NotNull VirtualFileEvent event) {
scheduleRediff();
}
//
// Helpers
//
@NotNull
private Set<Document> getDocuments() {
Set<Document> documents = new HashSet<Document>();
for (DiffContent content : myRequest.getContents()) {
if (content instanceof DocumentContent) {
documents.add(((DocumentContent)content).getDocument());
}
}
return documents;
}
}