/*
* =============================================================================
*
* Copyright (c) 2011-2014, The THYMELEAF team (http://www.thymeleaf.org)
*
* 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.thymeleaf.spring4.processor.attr;
import java.util.Map;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.servlet.support.BindStatus;
import org.springframework.web.servlet.tags.form.SelectedValueComparatorWrapper;
import org.thymeleaf.Arguments;
import org.thymeleaf.dom.Element;
import org.thymeleaf.dom.NestableNode;
import org.thymeleaf.exceptions.TemplateProcessingException;
import org.thymeleaf.processor.ProcessorResult;
import org.thymeleaf.spring4.requestdata.RequestDataValueProcessorUtils;
/**
*
* @author Daniel Fernández
*
* @since 1.0
*
*/
public final class SpringInputCheckboxFieldAttrProcessor
extends AbstractSpringFieldAttrProcessor {
public static final String CHECKBOX_INPUT_TYPE_ATTR_VALUE = "checkbox";
public SpringInputCheckboxFieldAttrProcessor() {
super(ATTR_NAME,
INPUT_TAG_NAME,
INPUT_TYPE_ATTR_NAME,
CHECKBOX_INPUT_TYPE_ATTR_VALUE);
}
@Override
protected ProcessorResult doProcess(final Arguments arguments,
final Element element, final String attributeName, final String attributeValue,
final BindStatus bindStatus, final Map<String, Object> localVariables) {
String name = bindStatus.getExpression();
name = (name == null? "" : name);
final String id = computeId(arguments, element, name, true);
String value = null;
boolean checked = false;
Object boundValue = bindStatus.getValue();
final Class<?> valueType = bindStatus.getValueType();
if (Boolean.class.equals(valueType) || boolean.class.equals(valueType)) {
if (boundValue instanceof String) {
boundValue = Boolean.valueOf((String) boundValue);
}
final Boolean booleanValue = (boundValue != null ? (Boolean) boundValue : Boolean.FALSE);
value = "true";
checked = booleanValue.booleanValue();
} else {
value = element.getAttributeValue("value");
if (value == null) {
throw new TemplateProcessingException(
"Attribute \"value\" is required in \"input(checkbox)\" tags " +
"when binding to non-boolean values");
}
checked = SelectedValueComparatorWrapper.isSelected(bindStatus, value);
}
final NestableNode parent = element.getParent();
final Element inputElement = (Element) element.cloneNode(parent, false);
inputElement.removeAttribute(attributeName);
inputElement.setAttribute("id", id);
inputElement.setAttribute("name", name);
inputElement.setAttribute(
"value",
RequestDataValueProcessorUtils.processFormFieldValue(
arguments.getConfiguration(), arguments, name, value, "checkbox"));
if (checked) {
inputElement.setAttribute("checked", "checked");
} else {
inputElement.removeAttribute("checked");
}
inputElement.setAllNodeLocalVariables(localVariables);
parent.insertBefore(element, inputElement);
if (!isDisabled(inputElement)) {
final String hiddenName = WebDataBinder.DEFAULT_FIELD_MARKER_PREFIX + name;
final String hiddenValue = "on";
final Element hiddenElement = new Element("input");
hiddenElement.setAttribute("type", "hidden");
hiddenElement.setAttribute("name", hiddenName);
hiddenElement.setAttribute(
"value",
RequestDataValueProcessorUtils.processFormFieldValue(
arguments.getConfiguration(), arguments, hiddenName, hiddenValue, "hidden"));
hiddenElement.setAllNodeLocalVariables(localVariables);
parent.insertBefore(element, hiddenElement);
}
parent.removeChild(element);
return ProcessorResult.OK;
}
private static final boolean isDisabled(final Element inputElement) {
// Disabled = attribute "disabled" exists
return inputElement.hasNormalizedAttribute("disabled");
}
}