001// Copyright 2006-2013 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.corelib.base.AbstractTextField;
019
020/**
021 * TextArea component corresponds to a <textarea> element. The value parameter is almost always bound to a string,
022 * but this is not an absolute requirement.  Since the component accepts informal parameters, the rows and cols attribute may
023 * be set that way (there is not a formal parameter).
024 * <p/>
025 * Includes the <code>cols</code> attribute, if a {@link org.apache.tapestry5.beaneditor.Width} annotation is present on
026 * the property bound to the value parameter.
027 *
028 * @tapestrydoc
029 * @see org.apache.tapestry5.corelib.components.TextOutput
030 * @see TextField
031 * @see Form
032 */
033public class TextArea extends AbstractTextField
034{
035    private String value;
036
037    @Override
038    protected final void writeFieldTag(MarkupWriter writer, String value)
039    {
040        writer.element("textarea",
041
042                "name", getControlName(),
043
044                "class", cssClass,
045
046                "id", getClientId(),
047
048                "cols", getWidth());
049
050        // Save until needed in after()
051
052        this.value = value;
053    }
054
055    final void afterRender(MarkupWriter writer)
056    {
057        // TextArea will not have a template.
058
059        if (value != null)
060            writer.write(value);
061
062        writer.end(); // textarea
063    }
064
065}