| /* |
| * 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.util.Key; |
| import com.intellij.util.containers.ContainerUtil; |
| |
| import java.util.Iterator; |
| import java.util.List; |
| |
| public class ChangeCounter implements ChangeList.Listener { |
| private static final Logger LOG = Logger.getInstance("#com.intellij.openapi.diff.impl.incrementalMerge.ChangeCounter"); |
| private static final Key<ChangeCounter> ourKey = Key.create("ChangeCounter"); |
| private final MergeList myMergeList; |
| private final List<Listener> myListeners = ContainerUtil.createLockFreeCopyOnWriteList(); |
| private int myChangeCounter = 0; |
| private int myConflictCounter = 0; |
| |
| private ChangeCounter(MergeList mergeList) { |
| myMergeList = mergeList; |
| myMergeList.addListener(this); |
| updateCounters(); |
| } |
| |
| @Override |
| public void onChangeApplied(ChangeList source) { |
| updateCounters(); |
| } |
| |
| public void onChangeRemoved(ChangeList source) { |
| updateCounters(); |
| } |
| |
| public void addListener(Listener listener) { myListeners.add(listener); } |
| public void removeListener(Listener listener) { myListeners.remove(listener); } |
| |
| private void updateCounters() { |
| int conflictCounter = 0; |
| int changeCounter = 0; |
| Iterator<Change> allChanges = myMergeList.getAllChanges(); |
| while (allChanges.hasNext()) { |
| Change change = allChanges.next(); |
| if (MergeList.NOT_CONFLICTS.value(change)) changeCounter++; |
| else conflictCounter++; |
| } |
| if (myChangeCounter != changeCounter || myConflictCounter != conflictCounter) { |
| myChangeCounter = changeCounter; |
| myConflictCounter = conflictCounter; |
| fireCountersChanged(); |
| } |
| } |
| |
| private void fireCountersChanged() { |
| for (Listener listener : myListeners) { |
| listener.onCountersChanged(this); |
| } |
| } |
| |
| public int getChangeCounter() { |
| return myChangeCounter; |
| } |
| |
| public int getConflictCounter() { |
| return myConflictCounter; |
| } |
| |
| public static ChangeCounter getOrCreate(MergeList mergeList) { |
| ChangeCounter data = mergeList.getUserData(ourKey); |
| if (data == null) { |
| data = new ChangeCounter(mergeList); |
| mergeList.putUserData(ourKey, data); |
| } |
| return data; |
| } |
| |
| public interface Listener { |
| void onCountersChanged(ChangeCounter counter); |
| } |
| } |