/*
    * 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.facelets;
  
  import org.apache.myfaces.tobago.component.Attributes;
  import org.apache.myfaces.tobago.component.UIFlowLayout;
  import org.apache.myfaces.tobago.layout.Measure;
  import org.apache.myfaces.tobago.layout.TextAlign;
  
  import javax.faces.view.facelets.FaceletContext;
  import javax.faces.view.facelets.MetaRule;
  import javax.faces.view.facelets.Metadata;
  import javax.faces.view.facelets.MetadataTarget;
  import javax.faces.view.facelets.TagAttribute;
  
  public class FlowLayoutRule extends MetaRule {
  
    public static final FlowLayoutRule INSTANCE = new FlowLayoutRule();
  
    public Metadata applyRule(String name, TagAttribute attribute, MetadataTarget metadataTarget) {
      if (metadataTarget.isTargetInstanceOf(UIFlowLayout.class)) {
        if (attribute.isLiteral()) {
          if (Attributes.TEXT_ALIGN.equals(name)) {
            return new TextAlignMapper(attribute);
          }
          if (Attributes.MARGIN_LEFT.equals(name)) {
            return new MarginLeftMapper(attribute);
          }
          if (Attributes.MARGIN_TOP.equals(name)) {
            return new MarginTopMapper(attribute);
          }
          if (Attributes.MARGIN_RIGHT.equals(name)) {
            return new MarginRightMapper(attribute);
          }
          if (Attributes.MARGIN_BOTTOM.equals(name)) {
            return new MarginBottomMapper(attribute);
          }
          if (Attributes.MARGIN.equals(name)) {
            return new MarginMapper(attribute);
          }
        }
      }
      return null;
    }
  
    static final class TextAlignMapper extends Metadata {
      private final TagAttribute attribute;
  
      TextAlignMapper(TagAttribute attribute) {
        this.attribute = attribute;
      }
  
      public void applyMetadata(FaceletContext ctx, Object instance) {
        UIFlowLayout gridLayout = (UIFlowLayout) instance;
        gridLayout.setTextAlign(TextAlign.parse(attribute.getValue()));
      }
    }
  
    static final class MarginLeftMapper extends Metadata {
      private final TagAttribute attribute;
  
      MarginLeftMapper(TagAttribute attribute) {
        this.attribute = attribute;
      }
  
      public void applyMetadata(FaceletContext ctx, Object instance) {
        UIFlowLayout gridLayout = (UIFlowLayout) instance;
        gridLayout.setMarginLeft(Measure.valueOf(attribute.getValue()));
      }
    }
  
    static final class MarginTopMapper extends Metadata {
      private final TagAttribute attribute;
  
      MarginTopMapper(TagAttribute attribute) {
        this.attribute = attribute;
      }
  
      public void applyMetadata(FaceletContext ctx, Object instance) {
        UIFlowLayout gridLayout = (UIFlowLayout) instance;
        gridLayout.setMarginTop(Measure.valueOf(attribute.getValue()));
      }
   }
 
   static final class MarginRightMapper extends Metadata {
     private final TagAttribute attribute;
 
     MarginRightMapper(TagAttribute attribute) {
       this.attribute = attribute;
     }
 
     public void applyMetadata(FaceletContext ctx, Object instance) {
       UIFlowLayout gridLayout = (UIFlowLayout) instance;
       gridLayout.setMarginRight(Measure.valueOf(attribute.getValue()));
     }
   }
 
   static final class MarginBottomMapper extends Metadata {
     private final TagAttribute attribute;
 
     MarginBottomMapper(TagAttribute attribute) {
       this.attribute = attribute;
     }
 
     public void applyMetadata(FaceletContext ctx, Object instance) {
       UIFlowLayout gridLayout = (UIFlowLayout) instance;
       gridLayout.setMarginBottom(Measure.valueOf(attribute.getValue()));
     }
   }
 
   static final class MarginMapper extends Metadata {
     private final TagAttribute attribute;
 
     MarginMapper(TagAttribute attribute) {
       this.attribute = attribute;
     }
 
     public void applyMetadata(FaceletContext ctx, Object instance) {
       UIFlowLayout gridLayout = (UIFlowLayout) instance;
       gridLayout.setMargin(Measure.valueOf(attribute.getValue()));
     }
   }
 }