/**
* Copyright 2010 JBoss Inc
*
* Licensed 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.guvnor.tools.actions;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.Properties;
import org.eclipse.compare.CompareUI;
import org.eclipse.compare.ITypedElement;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IObjectActionDelegate;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.webdav.IResponse;
import org.guvnor.tools.Activator;
import org.guvnor.tools.utils.GuvnorMetadataProps;
import org.guvnor.tools.utils.GuvnorMetadataUtils;
import org.guvnor.tools.utils.PlatformUtils;
import org.guvnor.tools.utils.VersionChooserDialog;
import org.guvnor.tools.utils.webdav.IWebDavClient;
import org.guvnor.tools.utils.webdav.StreamProcessingUtils;
import org.guvnor.tools.utils.webdav.WebDavClientFactory;
import org.guvnor.tools.utils.webdav.WebDavException;
import org.guvnor.tools.utils.webdav.WebDavServerCache;
import org.guvnor.tools.views.model.ResourceHistoryEntry;
/**
* Simple text-based compare editor input.
* @author jgraham
*/
public class CompareVersionAction implements IObjectActionDelegate {
private IFile selectedFile;
private GuvnorMetadataProps props;
private IWorkbenchPart targetPart;
private IWebDavClient client;
public CompareVersionAction() {
super();
}
/*
* (non-Javadoc)
* @see org.eclipse.ui.IObjectActionDelegate#setActivePart(org.eclipse.jface.action.IAction, org.eclipse.ui.IWorkbenchPart)
*/
public void setActivePart(IAction action, IWorkbenchPart targetPart) {
this.targetPart = targetPart;
}
/*
* (non-Javadoc)
* @see org.eclipse.ui.IActionDelegate#run(org.eclipse.jface.action.IAction)
*/
public void run(IAction action) {
if (selectedFile == null
|| props == null
|| targetPart == null) {
return;
}
VersionChooserDialog dialog =
new VersionChooserDialog(targetPart.getSite().getShell(),
selectedFile.getName(),
getVersionEntries());
if (dialog.open() == VersionChooserDialog.OK) {
compareWithSelectedVersion(dialog.getSelectedEntry());
}
}
private void compareWithSelectedVersion(ResourceHistoryEntry revision) {
IResponse response = null;
try {
IWorkbenchPage page = targetPart.getSite().getPage();
String leftContents = StreamProcessingUtils.getStreamContents(selectedFile.getContents());
GuvnorResourceEdition left =
new GuvnorResourceEdition(selectedFile.getName(),
ITypedElement.TEXT_TYPE,
leftContents, selectedFile.getCharset());
response = client.getResourceVersionInputStream(props.getFullpath(), revision.getRevision());
String rightContents = StreamProcessingUtils.getStreamContents(response.getInputStream());
//Assuming UTF-8 for Guvnor resources...
GuvnorResourceEdition right =
new GuvnorResourceEdition(selectedFile.getName() + ", " + revision.getRevision(), //$NON-NLS-1$
ITypedElement.TEXT_TYPE,
rightContents, "UTF-8"); //$NON-NLS-1$
CompareUI.openCompareEditorOnPage(new GuvnorCompareEditorInput(left, right), page);
} catch (Exception e) {
Activator.getDefault().displayError(IStatus.ERROR, e.getMessage(), e, true);
} finally {
if (response != null) {
try {
response.close();
} catch (IOException ioe) {
Activator.getDefault().writeLog(IStatus.ERROR, ioe.getMessage(), ioe);
}
}
}
}
private ResourceHistoryEntry[] getVersionEntries() {
ResourceHistoryEntry[] entries = new ResourceHistoryEntry[0];
IResponse response = null;
try {
client = WebDavServerCache.getWebDavClient(props.getRepository());
if (client == null) {
client = WebDavClientFactory.createClient(new URL(props.getRepository()));
WebDavServerCache.cacheWebDavClient(props.getRepository(), client);
}
InputStream ins = null;
try {
response = client.getResourceVersions(props.getFullpath());
ins = response.getInputStream();
} catch (WebDavException wde) {
if (wde.getErrorCode() != IResponse.SC_UNAUTHORIZED) {
// If not an authentication failure, we don't know what to do with it
throw wde;
}
boolean retry = PlatformUtils.getInstance().
authenticateForServer(props.getRepository(), client);
if (retry) {
response = client.getResourceVersions(props.getFullpath());
ins = response.getInputStream();
}
}
if (ins != null) {
Properties verProps = new Properties();
verProps.load(ins);
entries = GuvnorMetadataUtils.parseHistoryProperties(verProps);
}
} catch (Exception e) {
Activator.getDefault().writeLog(IStatus.ERROR, e.getMessage(), e);
} finally {
if (response != null) {
try {
response.close();
} catch (IOException ioe) {
Activator.getDefault().writeLog(IStatus.ERROR, ioe.getMessage(), ioe);
}
}
}
return entries;
}
/*
* (non-Javadoc)
* @see org.eclipse.ui.IActionDelegate#selectionChanged(org.eclipse.jface.action.IAction, org.eclipse.jface.viewers.ISelection)
*/
public void selectionChanged(IAction action, ISelection selection) {
// Reset state to default
selectedFile = null;
props = null;
action.setEnabled(false);
// See if we should enable for the selection
try {
if (selection instanceof IStructuredSelection) {
IStructuredSelection sel = (IStructuredSelection)selection;
if (sel.getFirstElement() instanceof IFile
&& sel.size() == 1) {
props = GuvnorMetadataUtils.getGuvnorMetadata((IFile)sel.getFirstElement());
if (props != null) {
selectedFile = (IFile)sel.getFirstElement();
action.setEnabled(true);
}
}
}
} catch (Exception e) {
Activator.getDefault().writeLog(IStatus.ERROR, e.getMessage(), e);
}
}
}