    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
    015    package org.apache.tapestry5.corelib.components;
    016
    017    import org.apache.tapestry5.MarkupWriter;
    018    import org.apache.tapestry5.annotations.Mixin;
    019    import org.apache.tapestry5.annotations.Parameter;
    020    import org.apache.tapestry5.corelib.mixins.DiscardBody;
    021
    022    import 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     */
    031    public 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    }