/*
* 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.wicket.markup.html;
import org.apache.wicket.Component;
import org.apache.wicket.application.IComponentInstantiationListener;
import org.apache.wicket.behavior.Behavior;
import org.apache.wicket.markup.ComponentTag;
import org.apache.wicket.markup.html.form.AbstractTextComponent;
import org.apache.wicket.markup.html.form.Button;
import org.apache.wicket.markup.html.form.FormComponent;
import org.apache.wicket.model.IModel;
import org.apache.wicket.validation.IValidator;
import org.apache.wicket.validation.ValidatorAdapter;
import org.apache.wicket.validation.validator.PatternValidator;
/**
* Behavior which renders HTML5 attributes.
*
* @see #onInput(AbstractTextComponent, ComponentTag)
* @see #onButton(Button, ComponentTag)
*/
public class HTML5Attributes extends Behavior
{
private static final long serialVersionUID = 1L;
@Override
public void onComponentTag(Component component, ComponentTag tag)
{
if (component instanceof AbstractTextComponent)
{
onInput((AbstractTextComponent<?>)component, tag);
}
else if (component instanceof Button)
{
onButton((Button)component, tag);
}
}
/**
* Writes HTML5 attributes for {@link AbstractTextComponent} inputs:
*
* <ul>
* <li>{@code required} if component {@link AbstractTextComponent#isRequired()}</li>
* <li>{@code placeholder} for {@link AbstractTextComponent#getLabel()}</li>
* <li>{@code pattern} for {@link AbstractTextComponent}s with a {@link PatternValidator}</li>
* <ul>
*
* @param input
* input component
* @param tag
* component tag
*/
protected void onInput(AbstractTextComponent<?> input, ComponentTag tag)
{
if (input.isRequired())
{
tag.put("required", "required");
}
IModel<String> label = input.getLabel();
if (label != null && label.getObject() != null)
{
tag.put("placeholder", label.getObject());
}
for (IValidator<?> validator : input.getValidators())
{
while (validator instanceof ValidatorAdapter)
{
validator = ((ValidatorAdapter<?>)validator).getValidator();
}
if (validator instanceof PatternValidator)
{
tag.put("pattern", ((PatternValidator)validator).getPattern().toString());
}
}
}
/**
* Writes HTML5 attributes for {@link Button}s:
*
* <ul>
* <li>{@code formnovalidate} if {@link Button#getDefaultFormProcessing()} returns {@code false}
* </li>
* <ul>
*
* @param button
* button component
* @param tag
* component tag
*/
protected void onButton(Button button, ComponentTag tag)
{
if (!button.getDefaultFormProcessing())
{
tag.put("formnovalidate", "formnovalidate");
}
}
/**
* A listener to instantiations of {@link FormComponent}s to add HTML5 attributes.
*/
public static class InstantiationListener implements IComponentInstantiationListener
{
/**
* Adds {@link HTML5Attributes} to all {@link FormComponent}s.
*/
@Override
public void onInstantiation(Component component)
{
if (component instanceof FormComponent)
{
component.add(new HTML5Attributes());
}
}
}
}