TextareaRenderer.java

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// TextareaRenderer.java

package com.sun.faces.renderkit.html_basic;

import java.io.IOException;

import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;

import com.sun.faces.renderkit.Attribute;
import com.sun.faces.renderkit.AttributeManager;
import com.sun.faces.renderkit.RenderKitUtils;

/**
 * <B>TextareaRenderer</B> is a class that renders the current value of
 * <code>UIInput<code> component as a Textarea.
 */

public class TextareaRenderer extends HtmlBasicInputRenderer {


    private static final Attribute[] ATTRIBUTES =
          AttributeManager.getAttributes(AttributeManager.Key.INPUTTEXTAREA);

    // ---------------------------------------------------------- Public Methods


    @Override
    public void encodeBegin(FacesContext context, UIComponent component)
          throws IOException {

        rendererParamsNotNull(context, component);

    }

    // ------------------------------------------------------- Protected Methods


    @Override
    protected void getEndTextToRender(FacesContext context,
                                      UIComponent component,
                                      String currentValue) throws IOException {

        ResponseWriter writer = context.getResponseWriter();
        assert(writer != null);

        String styleClass =
              (String) component.getAttributes().get("styleClass");

        writer.startElement("textarea", component);
        writeIdAttributeIfNecessary(context, writer, component);
        writer.writeAttribute("name", component.getClientId(context),
                              "clientId");
        if (null != styleClass) {
            writer.writeAttribute("class", styleClass, "styleClass");
        }

        // style is rendered as a passthru attribute
        RenderKitUtils.renderPassThruAttributes(context,
                                                writer,
                                                component,
                                                ATTRIBUTES);
        RenderKitUtils.renderXHTMLStyleBooleanAttributes(writer, component);

        RenderKitUtils.renderOnchange(context, component, false);

        if (component.getAttributes().containsKey("com.sun.faces.addNewLineAtStart") &&
                "true".equalsIgnoreCase((String) component.getAttributes().get("com.sun.faces.addNewLineAtStart"))) {
            writer.writeText("\n", null);
        }

        // render default text specified
        if (currentValue != null) {
            writer.writeText(currentValue, component, "value");
        }

        writer.endElement("textarea");

    }

} // end of class TextareaRenderer