/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you under the Apache 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.apache.org/licenses/LICENSE-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.apache.myfaces.tobago.internal.taglib.extension;
  
  import org.apache.myfaces.tobago.apt.annotation.ExtensionTag;
  import org.apache.myfaces.tobago.apt.annotation.Tag;
  import org.apache.myfaces.tobago.apt.annotation.TagAttribute;
  import org.apache.myfaces.tobago.apt.annotation.UIComponentTagAttribute;
  import org.apache.myfaces.tobago.component.Facets;
  import org.apache.myfaces.tobago.internal.layout.LayoutUtils;
  import org.apache.myfaces.tobago.internal.taglib.GridLayoutTag;
  import org.apache.myfaces.tobago.internal.taglib.LabelTag;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import javax.el.ValueExpression;
  import javax.faces.webapp.FacetTag;
  import javax.servlet.jsp.JspException;
  
  /**
   * Renders a label to any component.
   * <br />
   * Short syntax of:
   * <br />
   * <pre>
   * &lt;tc:panel>
   *   &lt;f:facet name="layout">
   *     &lt;tc:gridLayout columns="auto;*"/>
   *   &lt;/f:facet>
   *   &lt;tc:label value="#{label}" for="@auto"/>
   *     ...
   * &lt;/tc:panel>
   * </pre>
   * This is the universal version of the special versions: &lt;tx:in>, etc.
   * In other words:
   * <pre>
   * &lt;tx:label>
   *   &lt;tc:in/>
   * &lt;/tx:label>
   * </pre>
   * does the same like
   * <pre>
   *   &lt;tx:in/>
   * </pre>
   */
  
  @Tag(name = "label")
  @ExtensionTag(baseClassName = "org.apache.myfaces.tobago.internal.taglib.LabelTag")
  public class LabelExtensionTag extends TobagoExtensionBodyTagSupport {
  
    private static final Logger LOG = LoggerFactory.getLogger(LabelExtensionTag.class);
  
    public static final String DEFAULT_COLUMNS = "auto;*";
  
    private javax.el.ValueExpression value;
    private javax.el.ValueExpression tip;
    private javax.el.ValueExpression rendered;
    private javax.el.ValueExpression columns;
    private String rows = "auto";
    private javax.el.ValueExpression labelWidth;
    private javax.el.ValueExpression markup;
  
    private ExtensionPanelTag panelTag;
  
    @Override
    public int doStartTag() throws JspException {
  
      panelTag = new ExtensionPanelTag();
      panelTag.setPageContext(pageContext);
      panelTag.setParent(getParent());
      if (rendered != null) {
        panelTag.setRendered(rendered);
      }
      if (tip != null) {
        panelTag.setTip(tip);
      }
      if (id != null) {
        panelTag.setId(id);
      }
      panelTag.setJspId(nextJspId());
      panelTag.doStartTag();
  
     FacetTag facetTag = new FacetTag();
     facetTag.setPageContext(pageContext);
     facetTag.setName(Facets.LAYOUT);
     facetTag.setParent(panelTag);
     facetTag.doStartTag();
 
     if (columns == null) {
       if (labelWidth != null) {
         setColumns(createStringValueExpression(labelWidth.getExpressionString() + ";*"));
       } else {
         setColumns(createStringValueExpression(DEFAULT_COLUMNS));
       }
     }
     GridLayoutTag gridLayoutTag = new GridLayoutTag();
     gridLayoutTag.setPageContext(pageContext);
     gridLayoutTag.setColumns(columns);
     javax.el.ValueExpression ve = createStringValueExpression(rows);
     gridLayoutTag.setRows(ve);
     gridLayoutTag.setParent(facetTag);
     gridLayoutTag.setJspId(nextJspId());
     gridLayoutTag.doStartTag();
     gridLayoutTag.doEndTag();
 
     facetTag.doEndTag();
 
     LabelTag labelTag = new LabelTag();
     labelTag.setPageContext(pageContext);
     if (value != null) {
       labelTag.setValue(value);
     }
     if (markup != null) {
       labelTag.setMarkup(markup);
     }
     labelTag.setFor("@auto");
     labelTag.setParent(panelTag);
     labelTag.setJspId(nextJspId());
     labelTag.doStartTag();
     labelTag.doEndTag();
 
     return super.doStartTag();
   }
 
   @Override
   public int doEndTag() throws JspException {
     panelTag.doEndTag();
     return super.doEndTag();
   }
 
   @Override
   public void release() {
     super.release();
     value = null;
     tip = null;
     rendered = null;
     columns = null;
     rows = "auto";
     panelTag = null;
     labelWidth = null;
     markup = null;
   }
 
    /**
    * The current value of this component.
    */
   @TagAttribute
   @UIComponentTagAttribute(type = "java.lang.Object")
   public void setValue(javax.el.ValueExpression value) {
     this.value = value;
   }
 
   /**
    * Text value to display as tooltip.
    */
   @TagAttribute
   @UIComponentTagAttribute()
   public void setTip(javax.el.ValueExpression tip) {
     this.tip = tip;
   }
 
   /**
    * Flag indicating whether or not this component should be rendered
    * (during Render Response Phase), or processed on any subsequent form submit.
    */
   @TagAttribute
   @UIComponentTagAttribute(type = "boolean", defaultValue = "true")
   public void setRendered(javax.el.ValueExpression rendered) {
     this.rendered = rendered;
   }
 
   void setColumns(javax.el.ValueExpression columns) {
     if (!(!columns.isLiteralText() || LayoutUtils.checkTokens(columns.getExpressionString()))) {
       LOG.warn("Illegal value for columns = \"" + columns.getExpressionString()
           + "\" replacing with default: \"" + DEFAULT_COLUMNS + "\"");
       this.columns = createStringValueExpression(DEFAULT_COLUMNS);
     } else {
       this.columns = columns;
     }
   }
 
   void setRows(String rows) {
     this.rows = rows;
   }
 
    /**
    * The width for the label component. Default: 'auto'.
    * This value is used in the gridLayouts columns attribute.
    * See gridLayout tag for valid values.
    */
   @TagAttribute
   @UIComponentTagAttribute()
   public void setLabelWidth(ValueExpression labelWidth) {
     this.labelWidth = labelWidth;
   }
 
  /**
    * Indicate markup of this component.
    * Possible value is 'none'. But this can be overridden in the theme.
    */
   @TagAttribute
   @UIComponentTagAttribute(defaultValue = "none", type = "java.lang.String[]")
   public void setMarkup(javax.el.ValueExpression markup) {
     this.markup = markup;
   }
 }