001    // Copyright 2006, 2007, 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.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     * @see org.apache.tapestry5.corelib.components.TextOutput
029     * @tapestrydoc
030     * @see TextField
031     * @see Form
032     */
033    public 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            "id", getClientId(),
045    
046            "cols", getWidth());
047    
048            // Save until needed in after()
049    
050            this.value = value;
051        }
052    
053        final void afterRender(MarkupWriter writer)
054        {
055            // TextArea will not have a template.
056    
057            if (value != null)
058                writer.write(value);
059    
060            writer.end(); // textarea
061        }
062    
063    }