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/*******************************************************************************
* Copyright (c) 2010, 2015 SAP AG and others.
* All rights reserved. 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:
* Mathias Kinzler (SAP AG) - initial implementation
* Dariusz Luksza (dariusz@luksza.org) - add initial implementation of
* enableWhenRepositoryHaveHead(Object)
* Daniel Megert <daniel_megert@ch.ibm.com> - remove unnecessary @SuppressWarnings
* Thomas Wolf <thomas.wolf@paranor.ch> - Bug 482231
*******************************************************************************/
package org.eclipse.egit.ui.internal.repository.tree.command;
import java.io.File;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.expressions.IEvaluationContext;
import org.eclipse.core.runtime.IPath;
import org.eclipse.egit.core.RepositoryUtil;
import org.eclipse.egit.ui.Activator;
import org.eclipse.egit.ui.internal.repository.RepositoriesView;
import org.eclipse.egit.ui.internal.repository.tree.FileNode;
import org.eclipse.egit.ui.internal.repository.tree.FolderNode;
import org.eclipse.egit.ui.internal.repository.tree.RepositoryTreeNode;
import org.eclipse.egit.ui.internal.repository.tree.WorkingDirNode;
import org.eclipse.egit.ui.internal.selection.SelectionRepositoryStateCache;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.ISources;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.handlers.HandlerUtil;
abstract class RepositoriesViewCommandHandler<T extends RepositoryTreeNode<?>>
extends AbstractHandler {
private IEvaluationContext evaluationContext;
protected final RepositoryUtil util = Activator.getDefault()
.getRepositoryUtil();
public RepositoriesView getView(ExecutionEvent event) throws ExecutionException {
IWorkbenchPart part = HandlerUtil.getActivePartChecked(event);
return (RepositoriesView) part;
}
public Shell getShell(ExecutionEvent event) {
return HandlerUtil.getActiveShell(event);
}
@Override
public void setEnabled(Object evaluationContext) {
if (evaluationContext instanceof IEvaluationContext)
this.evaluationContext = (IEvaluationContext) evaluationContext;
else
this.evaluationContext = null;
}
@SuppressWarnings("unchecked")
public List<T> getSelectedNodes(ExecutionEvent event)
throws ExecutionException {
ISelection selection = HandlerUtil.getCurrentSelectionChecked(event);
if (selection instanceof IStructuredSelection)
return ((IStructuredSelection) selection).toList();
else
return Collections.emptyList();
}
/**
* Retrieve the current selection. The global selection is used if the menu
* selection is not available.
*
* @return the selection
*/
@SuppressWarnings("unchecked")
protected List<T> getSelectedNodes() {
if (evaluationContext != null) {
Object selection = evaluationContext
.getVariable(ISources.ACTIVE_MENU_SELECTION_NAME);
if (selection == null
|| !(selection instanceof IStructuredSelection))
selection = evaluationContext
.getVariable(ISources.ACTIVE_CURRENT_SELECTION_NAME);
if (selection instanceof IStructuredSelection)
return ((IStructuredSelection) selection).toList();
}
return Collections.emptyList();
}
public Shell getActiveShell(ExecutionEvent event) throws ExecutionException {
return HandlerUtil.getActiveShellChecked(event);
}
private boolean repositoryHasHead(T treeNode) {
return SelectionRepositoryStateCache.INSTANCE
.getHead(treeNode.getRepository()) != null;
}
private boolean selectionHasHead(boolean all) {
List<T> selectedNodes = getSelectedNodes();
if (selectedNodes.size() > 0) {
if (all) {
// check that all the repositories have a valid head
for (T element : selectedNodes)
if (!repositoryHasHead(element))
return false;
return true;
}
// just check the first one
return repositoryHasHead(selectedNodes.get(0));
}
return false;
}
/**
* @return true if the first repository that has been selected in the
* current evaluation context is a repository that has a valid head
* reference
*/
protected boolean selectedRepositoryHasHead() {
return selectionHasHead(false);
}
/**
* @return true if all repositories that have been selected in the current
* evaluation context have a valid head reference
*/
protected boolean selectedRepositoriesHaveHead() {
return selectionHasHead(true);
}
/**
* Enable the command if all of the following conditions are fulfilled: <li>
* All selected nodes belong to the same repository <li>All selected nodes
* are of type FileNode or FolderNode or WorkingTreeNode <li>Each node does
* not represent a file / folder in the git directory
*
* @return true if selection is a working directory selection
*/
protected boolean isWorkingDirSelection() {
List<T> selectedNodes = getSelectedNodes();
if (selectedNodes.isEmpty())
return false;
Repository repository = null;
for (T selectedNode : selectedNodes) {
Repository nodeRepository = selectedNode.getRepository();
if (repository == null)
repository = nodeRepository;
else if (repository != nodeRepository) {
return false;
}
if (!(selectedNode instanceof WorkingDirNode)) {
File file;
if (selectedNode instanceof FolderNode)
file = ((FolderNode) selectedNode).getObject()
.getAbsoluteFile();
else if (selectedNode instanceof FileNode)
file = ((FileNode) selectedNode).getObject()
.getAbsoluteFile();
else {
return false;
}
File gitDir = repository.getDirectory().getAbsoluteFile();
if (file.toPath().startsWith(gitDir.toPath())) {
return false;
}
}
}
return true;
}
protected Collection<IPath> getSelectedFileAndFolderPaths(ExecutionEvent event) throws ExecutionException {
Collection<IPath> paths = new ArrayList<>();
for (Object selectedNode : getSelectedNodes(event)) {
RepositoryTreeNode treeNode = (RepositoryTreeNode) selectedNode;
IPath path = treeNode.getPath();
paths.add(path);
}
return paths;
}
static <T> T getFirstOrNull(List<T> list) {
if (list.isEmpty())
return null;
return list.get(0);
}
}
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