/*
* =============================================================================
*
* 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.spring3.processor.attr;
import java.util.List;
import java.util.Map;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.servlet.support.BindStatus;
import org.thymeleaf.Arguments;
import org.thymeleaf.dom.Element;
import org.thymeleaf.dom.NestableNode;
import org.thymeleaf.dom.Node;
import org.thymeleaf.exceptions.TemplateProcessingException;
import org.thymeleaf.processor.ProcessorResult;
import org.thymeleaf.spring3.requestdata.RequestDataValueProcessorUtils;
/**
*
* @author Daniel Fernández
*
* @since 1.0
*
*/
public final class SpringSelectFieldAttrProcessor
extends AbstractSpringFieldAttrProcessor {
public SpringSelectFieldAttrProcessor() {
super(ATTR_NAME,
SELECT_TAG_NAME);
}
@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, false);
final boolean multiple = element.hasAttribute("multiple");
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.setAllNodeLocalVariables(localVariables);
processOptionChildren(inputElement, attributeName, attributeValue);
parent.insertBefore(element, inputElement);
parent.removeChild(element);
if (multiple && !isDisabled(inputElement)) {
final String hiddenName = WebDataBinder.DEFAULT_FIELD_MARKER_PREFIX + name;
final Element hiddenElement = new Element("input");
hiddenElement.setAttribute("type", "hidden");
hiddenElement.setAttribute("name", hiddenName);
hiddenElement.setAttribute(
"value",
RequestDataValueProcessorUtils.processFormFieldValue(
arguments.getConfiguration(), arguments, hiddenName, "1", "hidden"));
hiddenElement.setAllNodeLocalVariables(localVariables);
parent.insertAfter(inputElement, hiddenElement);
}
return ProcessorResult.OK;
}
private void processOptionChildren(
final Element inputTag, final String selectAttrName, final String selectAttrValue) {
final List<Node> children = inputTag.getChildren();
for (final Node child : children) {
if (child != null && child instanceof Element) {
final Element childTag = (Element) child;
final String childTagName = childTag.getNormalizedName();
childTag.setProcessable(true);
if ("option".equals(childTagName)) {
if (childTag.hasAttribute(selectAttrName)) { // has attribute
final String selectAttrInChildValue = childTag.getAttributeValue(selectAttrName);
if (selectAttrInChildValue != null) {
if (!selectAttrValue.equals(selectAttrInChildValue)) {
throw new TemplateProcessingException(
"If specified (which is not required), attribute " +
"\"" + selectAttrName + "\" in \"option\" tag must have " +
"exactly the same value as in its containing \"select\" " +
"tag");
}
}
} else {
childTag.setAttribute(selectAttrName, selectAttrValue);
childTag.setRecomputeProcessorsImmediately(true);
}
} else if ("optgroup".equals(childTagName)) {
processOptionChildren(childTag, selectAttrName, selectAttrValue);
}
}
}
}
private static final boolean isDisabled(final Element inputElement) {
// Disabled = attribute "disabled" exists
return inputElement.hasNormalizedAttribute("disabled");
}
}