InputColorRenderer.java

/**********************************************************************************
* $URL: https://source.sakaiproject.org/svn/jsf/trunk/jsf-widgets/src/java/org/sakaiproject/jsf/renderer/InputColorRenderer.java $
* $Id: InputColorRenderer.java 105077 2012-02-24 22:54:29Z ottenhoff@longsight.com $
***********************************************************************************
*
 * Copyright (c) 2003, 2004, 2005, 2006, 2007, 2008 The Sakai Foundation
 *
 * Licensed under the Educational Community License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.opensource.org/licenses/ECL-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
*
**********************************************************************************/


package org.sakaiproject.jsf.renderer;

import java.io.IOException;
import java.util.Map;

import javax.faces.component.UIComponent;
import javax.faces.component.UIInput;
import javax.faces.component.ValueHolder;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import javax.faces.render.Renderer;

import org.sakaiproject.jsf.util.ConfigurationResource;
import org.sakaiproject.jsf.util.RendererUtil;

/**
 * <p>Description: </p>
 * <p>Render the custom color picker control.</p>
 * <p>Copyright: Copyright (c) 2004</p>
 * <p>Organization: Sakai Project</p>
 * @author Ed Smiley
 * @version $id: $
 */

public class InputColorRenderer extends Renderer
{
  // icon height and width
  private static final String HEIGHT = "13";
  private static final String WIDTH = "15";

  // later we may want to support hidden
  private static final String TYPE = "text";

  private static final String CURSORSTYLE;
  private static final String CLICKALT;
  private static final String COLOR_PATH;
  private static final String COLOR_ICON;

  static {
    ConfigurationResource cr = new ConfigurationResource();
    String resources = cr.get("resources");
    CURSORSTYLE = cr.get("picker_style");
    COLOR_PATH = "/" + resources + "/" + cr.get("inputColorPopup");
    COLOR_ICON = "/" + resources + "/" + cr.get("inputColorImage");
    CLICKALT = cr.get("color_pick_alt");
  }

  public boolean supportsComponentType(UIComponent component)
  {
    return (component instanceof UIInput);
  }

  /**
   * decode method
   * @param context
   * @param component
   */
  public void decode(FacesContext context, UIComponent component)
  {
    // we haven't added these attributes--yet--defensive programming...
    if(RendererUtil.isDisabledOrReadonly(context, component))
    {
      return;
    }

    String clientId = component.getClientId(context);
    Map requestParameterMap = context.getExternalContext()
                              .getRequestParameterMap();
    String newValue = (String) requestParameterMap.get(clientId );
    UIInput comp = (UIInput) component;
    comp.setSubmittedValue(newValue);
  }

  /**
   * no-op
   * @param context
   * @param component
   * @throws IOException
   */
  public void encodeBegin(FacesContext context,
    UIComponent component) throws IOException
  {
    ;
  }

  /**
   * no-op
   * @param context
   * @param component
   * @throws IOException
   */
  public void encodeChildren(FacesContext context,
    UIComponent component) throws IOException
  {
    ;
  }

  /**
   * <p>Faces render output method .</p>
   * <p>Method Generator: org.sakaiproject.tool.assessment.devtoolsRenderMaker</p>
   *
   *  @param context   <code>FacesContext</code> for the current request
   *  @param component <code>UIComponent</code> being rendered
   *
   * @throws IOException if an input/output error occurs
   */
  public void encodeEnd(FacesContext context,
    UIComponent component) throws IOException
  {
    if (RendererUtil.isDisabledOrReadonly(context, component) || !component.isRendered())
    {
      return;
    }

    ResponseWriter writer = context.getResponseWriter();
    String contextPath = context.getExternalContext()
                         .getRequestContextPath();

    Object value = null;
    if (component instanceof UIInput)
    {
      value = ( (UIInput) component).getSubmittedValue();
    }
    if (value == null && component instanceof ValueHolder)
    {
      value = ( (ValueHolder) component).getValue();
    }
    String valString = "";
    if (value != null)
    {
      valString = value.toString();
    }

    String size = (String) RendererUtil.getAttribute(context, component, "size");
    if (size == null)
    {
      size = "20";
    }

    String clientId = component.getClientId(context);

    writer.write("\n");
    writer.write(" <input ");
    writer.write("\n");
    writer.write("  value=\"" + valString + "\" \n");
    writer.write("  type=\"" + TYPE + "\" \n");
    writer.write("  size=\"" + size + "\" \n");
    writer.write("  name=\"" + clientId + "\"\n");
    writer.write("  id=\"" + clientId + "\" /> ");
    writer.write("<img ");
    writer.write("  id=\"" + clientId + "_colorPickerPopup" + "\"");
    writer.write("  style=\"" + CURSORSTYLE + "\" ");
    writer.write("  height=\"" + HEIGHT + "\" ");
    writer.write("  width=\"" + WIDTH + "\"");
    writer.write("  src=\"" + COLOR_ICON + "\" ");
    writer.write("  border=\"0\"");
    writer.write("  alt=\"" + CLICKALT + "\" ");
    writer.write("  onclick=\"javascript:TCP.popup(" +
      "document.getElementById('" + clientId + "'),'','" +
      COLOR_PATH + "')\" />");
    writer.write(" ");
  }
}