pjs/grendel/ui/XMLWidgetBuilder.java

103 строки
2.9 KiB
Java

/* -*- Mode: java; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.0 (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* The Original Code is the Grendel mail/news client.
*
* The Initial Developer of the Original Code is Giao Nguyen
* <grail@cafebabe.org>. Portions created by Giao Nguyen are Copyright
* (C) 1999 Giao Nguyen. All Rights Reserved.
*
* Contributors: Morgan Schweers <morgan@vixen.com>
*/
package grendel.ui;
import java.util.Properties;
import java.net.URL;
import java.io.IOException;
import java.awt.Container;
import javax.swing.JComponent;
import org.w3c.dom.Node;
import org.w3c.dom.Element;
public abstract class XMLWidgetBuilder {
/**
* The properties bundle that the builder will reference to for
* things like getReferencedLabel.
*/
protected Properties properties = new Properties();
/**
* Reference point into the CLASSPATH for locating the XML file.
*/
protected Class ref;
/**
* Set the reference point for URL location.
*
* @param ref the reference point for local urls to be loaded from.
*/
public void setReference(Class ref) {
this.ref = ref;
}
/**
* Set the element as the item containing configuration for the
* builder. This would usually be the link tag in the head.
*
* @param config the element containing configuration data
*/
public void setConfiguration(Element config) {
try {
URL linkURL;
Class local = ((ref == null) ? getClass() : ref);;
// get the string properties
if (config.getAttribute("href").length() != 0
&& config.getAttribute("role").equals("stringprops")
&& config.getTagName().equals("link")) {
// this should never return null
linkURL = local.getResource(config.getAttribute("href"));
properties.load(linkURL.openStream());
}
} catch (IOException io) {
io.printStackTrace();
}
}
/**
* Get a label referenced by the string properties file.
* @param current the element to process
* @param attr the attribute to look up
* @return the string as post lookup, or the string pre lookup if
* the lookup failed
*/
public String getReferencedLabel(Element current, String attr) {
String label = current.getAttribute(attr);
// if it starts with a '$' we crossreference to properties
if (label != null && label.length() > 0
&& label.charAt(0) == '$') {
String key = label.substring(1);
label = properties.getProperty(key, label);
}
return label;
}
}