| /************************************************************** |
| * |
| * 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.openoffice.xmerge.merger.diff; |
| |
| import org.w3c.dom.Node; |
| |
| import org.openoffice.xmerge.converter.xml.OfficeConstants; |
| |
| |
| /** |
| * <p>This is an implementation of the <code>Iterator</code> interface. |
| * It will traverse the tree and find text/space/tab <code>Node</code> |
| * sequences.</p> |
| * |
| * <p>Note: Once the XML Tree is parsed, then the <code>Iterator</code> |
| * will be a snap shot of that tree. That means even the tree is modified |
| * later, than the cached paragraph <code>Node</code> list will not be |
| * updated accordingly. For this reason and for performance reasons |
| * this <code>Iterator</code> does not support any operation methods |
| * such as insert, remove or replace. The main purpose of this |
| * <code>Iterator</code> is to be used with difference, not with merge.</p> |
| * |
| * @author smak |
| */ |
| public final class TextNodeIterator extends NodeIterator { |
| |
| /** |
| * Standard constructor. |
| * |
| * @param initial The initial root <code>Node</code>. |
| */ |
| public TextNodeIterator(Node node) { |
| super(null, node); |
| } |
| |
| /** |
| * Overwrite the parent <code>nodeSupported</code> method. Only text |
| * <code>Node</code> objects are supported. |
| * |
| * @param node <code>Node</code> to check. |
| * |
| * @return true if the <code>Node</code> is supported, false |
| * otherwise. |
| */ |
| protected boolean nodeSupported(Node node) { |
| |
| // can use an array later to check all possible tags for |
| // future expansion |
| if (node.getNodeType() == Node.TEXT_NODE || |
| node.getNodeName().equals(OfficeConstants.TAG_SPACE) || |
| node.getNodeName().equals(OfficeConstants.TAG_TAB_STOP) || |
| node.getNodeName().equals(OfficeConstants.TAG_LINE_BREAK)) { |
| return true; |
| } else { |
| return false; |
| } |
| } |
| } |
| |