/*******************************************************************************
* Copyright (c) 2007-2012 Red Hat, Inc.
* Distributed under license by Red Hat, Inc. All rights reserved.
* This program is made available under the terms of the
* Eclipse Public License v1.0 which accompanies this distribution,
* and is available at http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Red Hat, Inc. - initial API and implementation
******************************************************************************/
package org.jboss.tools.common.text.ext.hyperlink;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.IRegion;
import org.eclipse.jface.text.Region;
import org.eclipse.wst.xml.core.internal.provisional.document.IDOMElement;
import org.eclipse.wst.xml.core.internal.provisional.document.IDOMText;
import org.jboss.tools.common.text.ext.hyperlink.xml.XMLRootHyperlinkPartitioner;
import org.jboss.tools.common.text.ext.util.RegionHolder;
import org.jboss.tools.common.text.ext.util.StructuredModelWrapper;
import org.jboss.tools.common.text.ext.util.StructuredSelectionHelper;
import org.jboss.tools.common.text.ext.util.Utils;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
/**
* @author Jeremy
*
*/
abstract public class JumpToHyperlink extends AbstractHyperlink {
/**
* @see com.ibm.sse.editor.AbstractHyperlink#doHyperlink(org.eclipse.jface.text.IRegion)
*/
protected void doHyperlink(IRegion region) {
RegionHolder holder = getRegionHolder(getName(region), region);
if (holder != null) {
StructuredSelectionHelper.setSelectionAndRevealInActiveEditor(holder.region);
} else {
openFileFailed();
}
}
protected String getName(IRegion region) {
try {
return Utils.trimQuotes(getDocument().get(region.getOffset(), region.getLength()));
} catch (BadLocationException x) {
//ignore
return null;
}
}
protected String getDestinationAxis() {
return null;
}
protected NodeList getRootElementsToSearch (IRegion region) {
StructuredModelWrapper smw = new StructuredModelWrapper();
try {
smw.init(getDocument());
Document xmlDocument = smw.getDocument();
if (xmlDocument == null) return null;
return xmlDocument.getChildNodes();
} finally {
smw.dispose();
}
}
protected RegionHolder getRegionHolder(String content, IRegion region) {
StructuredModelWrapper smw = new StructuredModelWrapper();
try {
smw.init(getDocument());
Document xmlDocument = smw.getDocument();
if (xmlDocument == null) return null;
List elements = findElementsByAxis(getRootElementsToSearch(region), getDestinationAxis());
if (elements == null || elements.size() == 0) return null;
for (int i = elements.size() - 1; i >= 0; i--) {
if (elements.get(i) instanceof IDOMElement) {
IDOMElement element = (IDOMElement)elements.get(i);
String text = Utils.trimQuotes(getElementText(element));
if (content.equals(text)) {
return new RegionHolder(new Region (element.getStartOffset(),
element.getStartStructuredDocumentRegion().getLength()));
}
}
}
return null;
} finally {
smw.dispose();
}
}
protected String getElementText(Node element) {
if (element instanceof IDOMText)
return ((IDOMText)element).getData();
StringBuffer text = new StringBuffer();
if (element instanceof IDOMElement) {
Node child = element.getFirstChild();
while (child != null) {
if (child instanceof IDOMText) {
text.append(((IDOMText)child).getData());
}
child = child.getNextSibling();
}
}
String result = text.toString();
if (result == null || result.length() == 0) return null;
return result;
}
protected List<Node> findElementsByAxis (NodeList list, String axis) {
String requiredAxis = axis.toLowerCase();
List<Node> elements = new ArrayList<Node>();
for (int i = 0; list != null && i < list.getLength(); i++) {
if (!(list.item(i) instanceof IDOMElement))
continue;
IDOMElement element = (IDOMElement)list.item(i);
String currentAxis = XMLRootHyperlinkPartitioner.computeAxis(getDocument(), element.getStartOffset()) + "/"; //$NON-NLS-1$
currentAxis = currentAxis.toLowerCase();
if (currentAxis.endsWith(requiredAxis)) {
elements.add(element);
}
if (element.hasChildNodes()) {
List<Node> add = findElementsByAxis(element.getChildNodes(), axis);
if (add != null)
elements.addAll(add);
}
}
return elements;
}
/*
* (non-Javadoc)
*
* @see IHyperlink#getHyperlinkText()
*/
abstract public String getHyperlinkText();
}