| /* |
| * 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.pom.tree.events.impl; |
| |
| import com.intellij.lang.ASTNode; |
| import com.intellij.pom.tree.events.ChangeInfo; |
| import com.intellij.pom.tree.events.TreeChange; |
| import com.intellij.psi.impl.source.tree.TreeElement; |
| import org.jetbrains.annotations.NonNls; |
| import org.jetbrains.annotations.NotNull; |
| |
| public class ChangeInfoImpl implements ChangeInfo { |
| @NonNls private static final String[] TO_STRING = {"add", "remove", "replace", "changed"}; |
| |
| private final short type; |
| private int myOldLength = 0; |
| |
| public static ChangeInfoImpl create(short type, @NotNull ASTNode changed){ |
| if (type == REPLACE) { |
| throw new IllegalArgumentException("use com.intellij.pom.tree.events.impl.ReplaceChangeInfoImpl"); |
| } |
| return new ChangeInfoImpl(type, changed); |
| } |
| |
| protected ChangeInfoImpl(short type, @NotNull ASTNode changed){ |
| this.type = type; |
| myOldLength = type != ADD ? ((TreeElement)changed).getNotCachedLength() : 0; |
| } |
| |
| @Override |
| public int getChangeType(){ |
| return type; |
| } |
| |
| public String toString(){ |
| return TO_STRING[getChangeType()]; |
| } |
| |
| public void compactChange(TreeChange change){ |
| for (final ASTNode treeElement : change.getAffectedChildren()) { |
| final ChangeInfo changeByChild = change.getChangeByChild(treeElement); |
| processElementaryChange(changeByChild, treeElement); |
| } |
| } |
| |
| public void processElementaryChange(final ChangeInfo changeByChild, final ASTNode treeElement) { |
| switch(changeByChild.getChangeType()){ |
| case ADD: |
| myOldLength -= ((TreeElement)treeElement).getNotCachedLength(); |
| break; |
| case REMOVED: |
| myOldLength += changeByChild.getOldLength(); |
| break; |
| case REPLACE: |
| myOldLength -= ((TreeElement)treeElement).getNotCachedLength(); |
| myOldLength += changeByChild.getOldLength(); |
| break; |
| case CONTENTS_CHANGED: |
| myOldLength -= ((TreeElement)treeElement).getNotCachedLength(); |
| myOldLength += changeByChild.getOldLength(); |
| break; |
| } |
| } |
| |
| @Override |
| public int getOldLength(){ |
| return myOldLength; |
| } |
| |
| public void setOldLength(int oldTreeLength) { |
| myOldLength = oldTreeLength; |
| } |
| } |