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/*******************************************************************************
* Copyright (c) 2000, 2018 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.team.internal.ccvs.ui;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.lang.reflect.InvocationTargetException;
import org.eclipse.compare.*;
import org.eclipse.compare.structuremergeviewer.IStructureComparator;
import org.eclipse.core.internal.dtree.IComparator;
import org.eclipse.core.resources.*;
import org.eclipse.core.runtime.*;
import org.eclipse.jface.text.IDocument;
import org.eclipse.swt.graphics.Image;
import org.eclipse.team.core.TeamException;
import org.eclipse.team.core.history.IFileRevision;
import org.eclipse.team.core.variants.IResourceVariant;
import org.eclipse.team.internal.ccvs.core.ICVSRemoteResource;
import org.eclipse.team.internal.ui.TeamUIPlugin;
import org.eclipse.team.internal.ui.history.FileRevisionEditorInput;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.texteditor.IDocumentProvider;
/**
* A class for comparing ICVSRemoteResource objects
*/
public class ResourceEditionNode implements IStructureComparator, ITypedElement, IEncodedStreamContentAccessor, IAdaptable {
private ICVSRemoteResource resource;
private ResourceEditionNode[] children;
private ISharedDocumentAdapter sharedDocumentAdapter;
private IEditorInput editorInput;
/**
* Creates a new ResourceEditionNode on the given resource edition.
*/
public ResourceEditionNode(ICVSRemoteResource resourceEdition) {
this.resource = resourceEdition;
}
/**
* Returns true if both resources names are identical.
* The content is not considered.
* @see IComparator#equals
*/
@Override
public boolean equals(Object other) {
if (other instanceof ITypedElement) {
String otherName = ((ITypedElement)other).getName();
return getName().equals(otherName);
}
return super.equals(other);
}
/**
* Enumerate children of this node (if any).
*/
@Override
public Object[] getChildren() {
if (children == null) {
children = new ResourceEditionNode[0];
if (resource != null) {
try {
CVSUIPlugin.runWithProgress(null, true /* cancelable */, monitor -> {
try {
ICVSRemoteResource[] members = resource.members(monitor);
children = new ResourceEditionNode[members.length];
for (int i = 0; i < members.length; i++) {
children[i] = new ResourceEditionNode(members[i]);
}
} catch (TeamException e) {
throw new InvocationTargetException(e);
}
});
} catch (InterruptedException e) {
// operation canceled
} catch (InvocationTargetException e) {
Throwable t = e.getTargetException();
if (t instanceof TeamException) {
CVSUIPlugin.log(((TeamException) t));
}
}
}
}
return children;
}
/**
* @see IStreamContentAccessor#getContents()
*/
@Override
public InputStream getContents() throws CoreException {
IStorage storage = getStorage();
if (storage != null) {
return storage.getContents();
}
return new ByteArrayInputStream(new byte[0]);
}
@Override
public Image getImage() {
return CompareUI.getImage(resource);
}
/**
* Returns the name of this node.
*/
@Override
public String getName() {
return resource == null ? "" : resource.getName(); //$NON-NLS-1$
}
public ICVSRemoteResource getRemoteResource() {
return resource;
}
/**
* Returns the comparison type for this node.
*/
@Override
public String getType() {
if (resource == null) {
return UNKNOWN_TYPE;
}
if (resource.isContainer()) {
return FOLDER_TYPE;
}
String name = resource.getName();
name = name.substring(name.lastIndexOf('.') + 1);
return name.length() == 0 ? UNKNOWN_TYPE : name;
}
/**
* @see IComparator#equals
*/
@Override
public int hashCode() {
return getName().hashCode();
}
@Override
public String getCharset() throws CoreException {
// Use the local file encoding if there is one
IResource local = resource.getIResource();
if (local != null && local.getType() == IResource.FILE) {
return ((IFile)local).getCharset();
}
// See if the remote file has an encoding
IStorage storage = getStorage();
if (storage instanceof IEncodedStorage) {
String charset = ((IEncodedStorage)storage).getCharset();
if (charset != null) {
return charset;
}
}
return null;
}
private IStorage getStorage() throws TeamException {
if (resource == null) {
return null;
}
final IStorage[] holder = new IStorage[1];
try {
CVSUIPlugin.runWithProgress(null, true /* cancelable */, monitor -> {
try {
holder[0] = ((IResourceVariant) resource).getStorage(monitor);
} catch (TeamException e) {
throw new InvocationTargetException(e);
}
});
} catch (InvocationTargetException e) {
throw TeamException.asTeamException(e);
} catch (InterruptedException e) {
// Shouldn't happen. Ignore
}
return holder[0];
}
@Override
public <T> T getAdapter(Class<T> adapter) {
if (adapter == ISharedDocumentAdapter.class) {
synchronized (this) {
if (sharedDocumentAdapter == null)
sharedDocumentAdapter = new SharedDocumentAdapter() {
@Override
public IEditorInput getDocumentKey(Object element) {
return ResourceEditionNode.this
.getDocumentKey(element);
}
@Override
public void flushDocument(IDocumentProvider provider,
IEditorInput documentKey, IDocument document,
boolean overwrite) throws CoreException {
// The document is read-only
}
};
return adapter.cast(sharedDocumentAdapter);
}
}
return Platform.getAdapterManager().getAdapter(this, adapter);
}
private IEditorInput getDocumentKey(Object element) {
try {
if (element == this && getStorage() != null) {
if (editorInput == null) {
editorInput = new FileRevisionEditorInput(resource
.getAdapter(IFileRevision.class), getStorage());
}
return editorInput;
}
} catch (TeamException e) {
TeamUIPlugin.log(e);
}
return null;
}
}
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