| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 org.apache.jackrabbit.vault.util.diff; |
| |
| /** |
| * Listener that is called for each line in a document. |
| * See {@link DocumentDiff#showChanges(ChangeListener, int)} for details. |
| */ |
| public interface ChangeListener { |
| |
| /** |
| * Invoked before the iteration over the changes start. |
| * @param left the left document |
| * @param right the right document |
| */ |
| void onDocumentsStart(Document left, Document right); |
| |
| /** |
| * Invoked after the iteration over the changes finished. |
| * @param left the left document |
| * @param right the right document |
| */ |
| void onDocumentsEnd(Document left, Document right); |
| |
| /** |
| * Invoked before a change starts. |
| * @param leftElem the index of the left element of this change. |
| * @param leftLen the number of changed left elements. |
| * @param rightElem the index of the right element of this change. |
| * @param rightLen the number of changed right elements. |
| */ |
| void onChangeStart(int leftElem, int leftLen, int rightElem, int rightLen); |
| |
| /** |
| * Invoked after a change finished. |
| */ |
| void onChangeEnd(); |
| |
| /** |
| * Invoked for an unmodified element |
| * @param leftIdx the index of the left element |
| * @param rightIdx the index of the right element |
| * @param elem the element |
| */ |
| void onUnmodified(int leftIdx, int rightIdx, Document.Element elem); |
| |
| /** |
| * Invoked for a deleted element |
| * @param leftIdx the index of the left element |
| * @param rightIdx the index of the right element |
| * @param elem the element |
| */ |
| void onDeleted(int leftIdx, int rightIdx, Document.Element elem); |
| |
| /** |
| * Invoked for an inserted element |
| * @param leftIdx the index of the left element |
| * @param rightIdx the index of the right element |
| * @param elem the element |
| */ |
| void onInserted(int leftIdx, int rightIdx, Document.Element elem); |
| |
| } |