001    package org.apache.myfaces.tobago.taglib.extension;
002    
003    /*
004     * Licensed to the Apache Software Foundation (ASF) under one or more
005     * contributor license agreements.  See the NOTICE file distributed with
006     * this work for additional information regarding copyright ownership.
007     * The ASF licenses this file to You under the Apache License, Version 2.0
008     * (the "License"); you may not use this file except in compliance with
009     * the License.  You may obtain a copy of the License at
010     *
011     *      http://www.apache.org/licenses/LICENSE-2.0
012     *
013     * Unless required by applicable law or agreed to in writing, software
014     * distributed under the License is distributed on an "AS IS" BASIS,
015     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016     * See the License for the specific language governing permissions and
017     * limitations under the License.
018     */
019    
020    import org.apache.commons.logging.Log;
021    import org.apache.commons.logging.LogFactory;
022    
023    import static org.apache.myfaces.tobago.TobagoConstants.FACET_LAYOUT;
024    import org.apache.myfaces.tobago.apt.annotation.ExtensionTag;
025    import org.apache.myfaces.tobago.apt.annotation.Tag;
026    import org.apache.myfaces.tobago.taglib.component.GridLayoutTag;
027    import org.apache.myfaces.tobago.taglib.component.LabelTag;
028    import org.apache.myfaces.tobago.taglib.component.PanelTag;
029    import org.apache.myfaces.tobago.taglib.decl.HasTip;
030    import org.apache.myfaces.tobago.taglib.decl.HasValue;
031    import org.apache.myfaces.tobago.util.LayoutUtil;
032    
033    import javax.faces.webapp.FacetTag;
034    import javax.faces.webapp.UIComponentTag;
035    import javax.servlet.jsp.JspException;
036    import javax.servlet.jsp.tagext.BodyTagSupport;
037    
038    @Tag(name = "label")
039    @ExtensionTag(baseClassName = "org.apache.myfaces.tobago.taglib.component.LabelTag")
040    public class LabelExtensionTag extends BodyTagSupport
041        implements HasValue, HasTip {
042    
043      private static final Log LOG = LogFactory.getLog(LabelExtensionTag.class);
044    
045      public static final String DEFAULT_COLUMNS = "fixed;*";
046    
047      private String value;
048      private String tip;
049      private String rendered;
050      private String columns = DEFAULT_COLUMNS;
051      private String rows = "fixed";
052    
053      private PanelTag panelTag;
054    
055      @Override
056      public int doStartTag() throws JspException {
057    
058        panelTag = new PanelTag();
059        panelTag.setPageContext(pageContext);
060        panelTag.setParent(getParent());
061        if (rendered != null) {
062          panelTag.setRendered(rendered);
063        }
064        panelTag.doStartTag();
065    
066        FacetTag facetTag = new FacetTag();
067        facetTag.setPageContext(pageContext);
068        facetTag.setName(FACET_LAYOUT);
069        facetTag.setParent(panelTag);
070        facetTag.doStartTag();
071    
072        GridLayoutTag gridLayoutTag = new GridLayoutTag();
073        gridLayoutTag.setPageContext(pageContext);
074        gridLayoutTag.setColumns(columns);
075        gridLayoutTag.setRows(rows);
076        gridLayoutTag.setParent(facetTag);
077        gridLayoutTag.doStartTag();
078        gridLayoutTag.doEndTag();
079    
080        facetTag.doEndTag();
081    
082        LabelTag labelTag = new LabelTag();
083        labelTag.setPageContext(pageContext);
084        if (value != null) {
085          labelTag.setValue(value);
086        }
087        if (tip != null) {
088          labelTag.setTip(tip);
089        }
090        labelTag.setFor("@auto");
091        labelTag.setParent(panelTag);
092        labelTag.doStartTag();
093        labelTag.doEndTag();
094    
095        return super.doStartTag();
096      }
097    
098      @Override
099      public int doEndTag() throws JspException {
100        panelTag.doEndTag();
101        return super.doEndTag();
102      }
103    
104      @Override
105      public void release() {
106        super.release();
107        value = null;
108        tip = null;
109        rendered = null;
110        columns = DEFAULT_COLUMNS;
111        rows = "fixed";
112        panelTag = null;
113      }
114    
115      public void setValue(String value) {
116        this.value = value;
117      }
118    
119      public void setTip(String tip) {
120        this.tip = tip;
121      }
122    
123      public void setRendered(String rendered) {
124        this.rendered = rendered;
125      }
126    
127      void setColumns(String columns) {
128        if (!(UIComponentTag.isValueReference(columns) || LayoutUtil.checkTokens(columns))) {
129          LOG.warn("Illegal value for columns = \"" + columns + "\" replacing with default: \"" + DEFAULT_COLUMNS + "\"");
130          this.columns = DEFAULT_COLUMNS;
131        } else {
132          this.columns = columns;
133        }
134      }
135    
136      void setRows(String rows) {
137        this.rows = rows;
138      }
139    }