001    // Copyright 2006, 2008, 2009 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    //     http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.tapestry5.dom;
016    
017    import java.io.PrintWriter;
018    import java.util.Map;
019    
020    /**
021     * A type of node that contains text.
022     */
023    public final class Text extends Node
024    {
025        private final StringBuilder buffer;
026    
027        Text(Element container, String text)
028        {
029            super(container);
030    
031            buffer = new StringBuilder(text.length());
032    
033            write(text);
034        }
035    
036        boolean isEmpty()
037        {
038            return buffer.length() == 0 || buffer.toString().trim().length() == 0;
039        }
040    
041        /**
042         * Writes additional text into the node, appending it to any existing text.
043         */
044        public void write(String text)
045        {
046            buffer.append(text);
047        }
048    
049        public void writef(String format, Object... args)
050        {
051            write(String.format(format, args));
052        }
053    
054        @Override
055        void toMarkup(Document document, PrintWriter writer, Map<String, String> namespaceURIToPrefix)
056        {
057            String encoded = document.getMarkupModel().encode(buffer.toString());
058    
059            writer.print(encoded);
060        }
061    }