/*
* 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.openmeetings.web.app;
import java.text.ParseException;
import org.apache.wicket.Component;
import org.apache.wicket.MarkupContainer;
import org.apache.wicket.WicketRuntimeException;
import org.apache.wicket.behavior.Behavior;
import org.apache.wicket.markup.ComponentTag;
import org.apache.wicket.markup.MarkupElement;
import org.apache.wicket.markup.MarkupResourceStream;
import org.apache.wicket.markup.MarkupStream;
import org.apache.wicket.markup.html.TransparentWebMarkupContainer;
import org.apache.wicket.markup.html.WebComponent;
import org.apache.wicket.markup.parser.AbstractMarkupFilter;
import org.apache.wicket.markup.parser.filter.WicketMessageTagHandler;
import org.apache.wicket.markup.resolver.IComponentResolver;
import org.apache.wicket.util.string.Strings;
public class MessageTagHandler extends AbstractMarkupFilter implements
IComponentResolver {
/** */
private static final long serialVersionUID = 1L;
/**
* The id automatically assigned to tags with wicket:message attribute but
* without id
*/
public final static String WICKET_MESSAGE_CONTAINER_ID = "_message_attr_";
/**
* Constructor for the IComponentResolver role.
*/
public MessageTagHandler() {
this(null);
}
/**
* Constructor for the IMarkupFilter role.
*/
public MessageTagHandler(final MarkupResourceStream markupResourceStream) {
super(markupResourceStream);
}
@Override
protected final MarkupElement onComponentTag(ComponentTag tag)
throws ParseException {
if (tag.isClose()) {
return tag;
}
final String wicketMessageAttribute = tag.getAttributes().getString(
getWicketMessageAttrName());
if (Strings.isEmpty(wicketMessageAttribute) == false) {
// check if this tag is raw markup
if (tag.getId() == null) {
// if this is a raw tag we need to set the id to something so
// that wicket will not merge this as raw markup and instead
// pass it on to a resolver
tag.setId(getWicketMessageIdPrefix());
tag.setAutoComponentTag(true);
tag.setModified(true);
}
tag.addBehavior(new AttributeLocalizer(getWicketMessageAttrName()));
}
return tag;
}
/**
* Attribute localizing behavior. See the javadoc of
* {@link WicketMessageTagHandler} for details.
*
* @author Igor Vaynberg (ivaynberg)
*/
public static class AttributeLocalizer extends Behavior {
private static final long serialVersionUID = 1L;
private final String wicketMessageAttrName;
public AttributeLocalizer(String wicketMessageAttrName) {
this.wicketMessageAttrName = wicketMessageAttrName;
}
@Override
public void onComponentTag(final Component component,
final ComponentTag tag) {
String expr = tag.getAttributes().getString(wicketMessageAttrName);
if (!Strings.isEmpty(expr)) {
expr = expr.trim();
String[] attrsAndKeys = Strings.split(expr, ',');
for (String attrAndKey : attrsAndKeys) {
int colon = attrAndKey.lastIndexOf(":");
// make sure the attribute-key pair is valid
if (attrAndKey.length() < 3 || colon < 1
|| colon > attrAndKey.length() - 2) {
throw new WicketRuntimeException(
"wicket:message attribute contains an invalid value [["
+ expr
+ "]], must be of form (attr:key)+");
}
String attr = attrAndKey.substring(0, colon);
String key = attrAndKey.substring(colon + 1);
final String value = WebSession.getString(Long.parseLong(key));
tag.put(attr, value);
}
}
}
}
public Component resolve(final MarkupContainer container, final MarkupStream markupStream,
final ComponentTag tag) {
// localize any raw markup that has wicket:message attrs
if ((tag != null)
&& (tag.getId().startsWith(getWicketMessageIdPrefix()))) {
Component wc;
int autoIndex = container.getPage().getAutoIndex();
String id = getWicketMessageIdPrefix() + autoIndex;
if (tag.isOpenClose()) {
wc = new WebComponent(id);
} else {
wc = new TransparentWebMarkupContainer(id);
}
return wc;
}
return null;
}
private String getWicketMessageAttrName() {
String wicketNamespace = getWicketNamespace();
return wicketNamespace + ':' + "ommessage";
}
private String getWicketMessageIdPrefix() {
return getWicketNamespace() + WICKET_MESSAGE_CONTAINER_ID;
}
}