    001// Copyright 2008, 2011 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
    015package org.apache.tapestry5.corelib.components;
    016
    017import org.apache.tapestry5.MarkupWriter;
    018import org.apache.tapestry5.annotations.Mixin;
    019import org.apache.tapestry5.annotations.Parameter;
    020import org.apache.tapestry5.corelib.mixins.DiscardBody;
    021
    022import java.util.regex.Pattern;
    023
    024/**
    025 * Outputs paragraph oriented text, typically collected via a {@link org.apache.tapestry5.corelib.components.TextArea}
    026 * component.  The TextArea is split into lines, and each line it output inside its own &lt;p&gt; element.
    027 *
    028 * @see TextArea
    029 * @tapestrydoc
    030 */
    031public class TextOutput
    032{
    033    @Parameter(required = true)
    034    private String value;
    035
    036    @Mixin
    037    private DiscardBody discardBody;
    038
    039    private static final Pattern SPLIT_PATTERN = Pattern.compile("((\\r\\n)|\\r|\\n)", Pattern.MULTILINE);
    040
    041    void beginRender(MarkupWriter writer)
    042    {
    043        if (value == null) return;
    044
    045        String[] lines = SPLIT_PATTERN.split(value);
    046
    047        for (String line : lines)
    048        {
    049            writer.element("p");
    050
    051            writer.write(line.trim());
    052
    053            writer.end();
    054        }
    055    }
    056
    057    void injectValue(String value)
    058    {
    059        this.value = value;
    060    }
    061}