//  Copyright 2008 The Apache Software Foundation

 //

 // Licensed 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.tapestry5.internal.util;

 import org.apache.tapestry5.*;

 /**

  * Used by {@link org.apache.tapestry5.corelib.components.Form} to determine which fields will be focused and a what

  * priority.

  */

 public class AutofocusValidationDecorator extends ValidationDecoratorWrapper

 {

     private final ValidationTracker tracker;

     private final RenderSupport renderSupport;

     public AutofocusValidationDecorator(ValidationDecorator delegate, ValidationTracker tracker,

                                         RenderSupport renderSupport)

     {

         super(delegate);

         this.tracker = tracker;

         this.renderSupport = renderSupport;

     }

     @Override

     public void insideField(Field field)

     {

         super.insideField(field);

         if (!field.isDisabled())

         {

             renderSupport.autofocus(getPriority(field), field.getClientId());

         }

     }

     private FieldFocusPriority getPriority(Field field)

     {

         if (tracker.inError(field)) return FieldFocusPriority.IN_ERROR;

         if (field.isRequired()) return FieldFocusPriority.REQUIRED;

         return FieldFocusPriority.OPTIONAL;

     }

 }