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/*******************************************************************************
* Copyright (c) 2006, 2018 Red Hat Inc. and others.
*
* This program and the accompanying materials are made
* available under the terms of the Eclipse Public License 2.0
* which is available at https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Kyu Lee <klee@redhat.com> - initial API and implementation
* Remy Chi Jian Suen <remy.suen@gmail.com> - clean up internal API references (bug #179389)
*******************************************************************************/
package org.eclipse.linuxtools.internal.changelog.core.editors;
import org.eclipse.core.filebuffers.FileBuffers;
import org.eclipse.core.filebuffers.ITextFileBuffer;
import org.eclipse.core.filebuffers.ITextFileBufferManager;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IWorkspaceRoot;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.IPath;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.IRegion;
import org.eclipse.jface.text.ITextViewer;
import org.eclipse.jface.text.ITypedRegion;
import org.eclipse.jface.text.Region;
import org.eclipse.jface.text.hyperlink.AbstractHyperlinkDetector;
import org.eclipse.jface.text.hyperlink.IHyperlink;
import org.eclipse.jface.text.rules.Token;
public class GNUHyperlinkDetector extends AbstractHyperlinkDetector {
private IPath documentLocation;
/**
* Detector using RuleBasedScanner.
*/
@Override
public IHyperlink[] detectHyperlinks(ITextViewer textViewer, IRegion region, boolean canShowMultipleHyperlinks) {
if (documentLocation == null) {
ITextFileBufferManager bufferManager = FileBuffers.getTextFileBufferManager();
ITextFileBuffer buffer = bufferManager.getTextFileBuffer(textViewer.getDocument());
if (buffer == null) {
return null;
}
documentLocation = buffer.getLocation().removeLastSegments(1);
}
IDocument thisDoc = textViewer.getDocument();
GNUHyperlinkScanner scanner = new GNUHyperlinkScanner();
ITypedRegion partitionInfo = null;
try {
partitionInfo = thisDoc.getPartition(region.getOffset());
} catch (org.eclipse.jface.text.BadLocationException e1) {
e1.printStackTrace();
return null;
}
scanner.setRange(thisDoc, partitionInfo.getOffset(), partitionInfo.getLength());
Token tmpToken = (Token) scanner.nextToken();
String tokenStr = (String) tmpToken.getData();
if (tokenStr == null) {
return null;
}
// try to find non-default token containing region..if none, return
// null.
while (region.getOffset() < scanner.getTokenOffset() || region.getOffset() > scanner.getOffset()
|| tokenStr.equals("_other")) {
tmpToken = (Token) scanner.nextToken();
tokenStr = (String) tmpToken.getData();
if (tokenStr == null)
return null;
}
Region tokenRegion = new Region(scanner.getTokenOffset(), scanner.getTokenLength());
String line = "";
try {
line = thisDoc.get(tokenRegion.getOffset(), tokenRegion.getLength());
} catch (org.eclipse.jface.text.BadLocationException e1) {
e1.printStackTrace();
return null;
}
// process file link
if (tokenStr.equals(GNUHyperlinkScanner.FILE_NAME)) {
Region pathRegion = null;
int lineOffset = 0;
// cut "* " if necessary
if (line.startsWith("* ")) {
lineOffset = 2;
line = line.substring(2);
}
pathRegion = new Region(tokenRegion.getOffset() + lineOffset, line.length());
if (documentLocation == null)
return null;
// Replace any escape characters added to name
line = line.replaceAll("\\\\(.)", "$1");
IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();
IResource resource = root.findMember(documentLocation.append(line));
IFile fileLoc = resource.getAdapter(IFile.class);
if (fileLoc != null && fileLoc.exists()) {
return new IHyperlink[] { new FileHyperlink(pathRegion, fileLoc) };
}
}
return null;
}
}
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