/*******************************************************************************
* 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.xml;
import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.IRegion;
import org.eclipse.jface.text.Region;
import org.jboss.tools.common.text.ext.hyperlink.AbstractHyperlinkPartitioner;
import org.jboss.tools.common.text.ext.hyperlink.HyperlinkRegion;
import org.jboss.tools.common.text.ext.hyperlink.IHyperlinkPartitionRecognizer;
import org.jboss.tools.common.text.ext.hyperlink.IHyperlinkRegion;
import org.jboss.tools.common.text.ext.util.StructuredModelWrapper;
import org.jboss.tools.common.text.ext.util.Utils;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.Text;
/**
* @author Jeremy
*/
public class XMLJumpToHyperlinkPartitioner extends AbstractHyperlinkPartitioner implements IHyperlinkPartitionRecognizer {
public static final String XML_JUMP_TO_PARTITION = "org.jboss.tools.common.text.xml.XML_JUMP_TO"; //$NON-NLS-1$
protected String getPartitionType() {
return XML_JUMP_TO_PARTITION;
}
/**
* @see com.ibm.sse.editor.hyperlink.AbstractHyperlinkPartitioner#parse(org.eclipse.jface.text.IDocument, com.ibm.sse.editor.extensions.hyperlink.IHyperlinkRegion)
*/
protected IHyperlinkRegion parse(IDocument document, int offset, IHyperlinkRegion superRegion) {
StructuredModelWrapper smw = new StructuredModelWrapper();
try {
smw.init(document);
Document xmlDocument = smw.getDocument();
if (xmlDocument == null) return null;
if (!recognize(document, offset, superRegion)) return null;
IRegion r = getRegion(document, offset);
if (r == null) return null;
String axis = getAxis(document, offset);
String contentType = superRegion.getContentType();
String type = getPartitionType();
return new HyperlinkRegion(r.getOffset(), r.getLength(), axis, contentType, type);
} finally {
smw.dispose();
}
}
protected IRegion getRegion(IDocument document, final int offset) {
StructuredModelWrapper smw = new StructuredModelWrapper();
try {
smw.init(document);
Document xmlDocument = smw.getDocument();
if (xmlDocument == null) return null;
Node n = Utils.findNodeForOffset(xmlDocument, offset);
if (n == null || !(n instanceof Text)) return null;
int start = Utils.getValueStart(n);
int end = Utils.getValueEnd(n);
if (start < 0 || start > offset) return null;
String attrText = document.get(start, end - start);
StringBuffer sb = new StringBuffer(attrText);
//find start and end of path property
int bStart = 0;
int bEnd = attrText.length() - 1;
while (bStart < bEnd &&
(sb.charAt(bStart) == '\'' || sb.charAt(bStart) == '\"' ||
Character.isWhitespace(sb.charAt(bStart)))) {
bStart++;
}
while (bEnd > bStart &&
(sb.charAt(bEnd) == '\'' || sb.charAt(bEnd) == '\"' ||
Character.isWhitespace(sb.charAt(bEnd)))) {
bEnd--;
}
bEnd++;
final int propStart = bStart + start;
final int propLength = bEnd - bStart;
if (propStart > offset || propStart + propLength < offset) return null;
return new Region(propStart,propLength);
} catch (BadLocationException x) {
//ignore
return null;
} finally {
smw.dispose();
}
}
protected String[] getValidAxisEndings() {
return null;
}
private boolean validAxis(Node n, String validAxisEnding) {
if (validAxisEnding == null || validAxisEnding.lastIndexOf('/') == -1) return false;
StringTokenizer st = new StringTokenizer(validAxisEnding, "/"); //$NON-NLS-1$
List<String> tokens = new ArrayList<String>();
while (st.hasMoreTokens()) {
tokens.add(st.nextToken());
}
if (tokens.size() == 0) return false;
Node currentElement = n;
for (int i = tokens.size() - 1; i >= 0; i--) {
if (currentElement == null || !(currentElement instanceof Element))
return false;
String token = (String)tokens.get(i);
if (!token.equals(currentElement.getNodeName()))
return false;
currentElement = currentElement.getParentNode();
}
return true;
}
/**
* @see com.ibm.sse.editor.extensions.hyperlink.IHyperlinkPartitionRecognizer#recognize(org.eclipse.jface.text.IDocument, com.ibm.sse.editor.extensions.hyperlink.IHyperlinkRegion)
*/
public boolean recognize(IDocument document, int offset, IHyperlinkRegion region) {
StructuredModelWrapper smw = new StructuredModelWrapper();
try {
smw.init(document);
Document xmlDocument = smw.getDocument();
if (xmlDocument == null) return false;
Node n = Utils.findNodeForOffset(xmlDocument, offset);
if (!(n instanceof Text)) return false;
String[] validAxisEndings = getValidAxisEndings();
if (validAxisEndings == null || validAxisEndings.length == 0) return false;
for (int i = 0; validAxisEndings != null && i < validAxisEndings.length; i++) {
if (validAxis(n.getParentNode(), validAxisEndings[i]))
return true;
}
return false;
} finally {
smw.dispose();
}
}
}