| /* |
| * 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.openapi.diff.impl.incrementalMerge; |
| |
| import com.intellij.openapi.diagnostic.Logger; |
| 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.ex.DocumentEx; |
| import com.intellij.openapi.editor.impl.RangeMarkerImpl; |
| import com.intellij.openapi.util.Key; |
| import com.intellij.openapi.util.TextRange; |
| import org.jetbrains.annotations.NotNull; |
| |
| import java.util.ArrayList; |
| |
| class DiffRangeMarker extends RangeMarkerImpl { |
| private static final Logger LOG = Logger.getInstance("#com.intellij.openapi.diff.impl.incrementalMerge.DiffRangeMarker"); |
| private RangeInvalidListener myListener; |
| |
| DiffRangeMarker(@NotNull DocumentEx document, @NotNull TextRange range, RangeInvalidListener listener) { |
| super(document, range.getStartOffset(), range.getEndOffset(),true); |
| myListener = listener; |
| if (myListener != null) InvalidRangeDispatcher.addClient(document); |
| } |
| |
| @Override |
| protected void changedUpdateImpl(DocumentEvent e) { |
| super.changedUpdateImpl(e); |
| if (!isValid() && myListener != null) InvalidRangeDispatcher.notify(e.getDocument(), myListener); |
| } |
| |
| public void removeListener(RangeInvalidListener listener) { |
| LOG.assertTrue(myListener == listener || myListener == null); |
| myListener = null; |
| InvalidRangeDispatcher.removeClient(getDocument()); |
| } |
| |
| public interface RangeInvalidListener { |
| void onRangeInvalidated(); |
| } |
| |
| private static class InvalidRangeDispatcher extends DocumentAdapter { |
| private static final Key<InvalidRangeDispatcher> KEY = Key.create("deferedNotifier"); |
| private final ArrayList<RangeInvalidListener> myDeferedNotifications = new ArrayList<RangeInvalidListener>(); |
| private int myClientCount = 0; |
| |
| public void documentChanged(DocumentEvent e) { |
| if (myDeferedNotifications.isEmpty()) return; |
| RangeInvalidListener[] notifications = myDeferedNotifications.toArray(new RangeInvalidListener[myDeferedNotifications.size()]); |
| myDeferedNotifications.clear(); |
| for (RangeInvalidListener notification : notifications) { |
| notification.onRangeInvalidated(); |
| } |
| } |
| |
| public static void notify(Document document, RangeInvalidListener listener) { |
| InvalidRangeDispatcher notifier = document.getUserData(KEY); |
| notifier.myDeferedNotifications.add(listener); |
| } |
| |
| public static void addClient(@NotNull Document document) { |
| InvalidRangeDispatcher notifier = document.getUserData(KEY); |
| if (notifier == null) { |
| notifier = new InvalidRangeDispatcher(); |
| document.putUserData(KEY, notifier); |
| document.addDocumentListener(notifier); |
| } |
| notifier.myClientCount++; |
| } |
| |
| private static void removeClient(Document document) { |
| InvalidRangeDispatcher notifier = document.getUserData(KEY); |
| notifier.onClientRemoved(document); |
| } |
| |
| private void onClientRemoved(Document document) { |
| myClientCount--; |
| LOG.assertTrue(myClientCount >= 0); |
| if (myClientCount == 0) { |
| document.putUserData(KEY, null); |
| document.removeDocumentListener(this); |
| } |
| } |
| } |
| } |