OpenMergeToolHandler.java

package com.proalpha.pds.gitutils.common;
 
import java.util.ArrayList;
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.egit.ui.internal.repository.tree.RepositoryTreeNode;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.handlers.HandlerUtil;
 
public class OpenMergeToolHandler<T extends RepositoryTreeNode<?>> extends AbstractHandler {
 
    @Override
    public Object execute(ExecutionEvent event) throws ExecutionException {
 
        com.proalpha.pds.gitutils.common.Repository repository = com.proalpha.pds.gitutils.common.Repository
                .getInstance();
 
        Object repo = getSelectedNodes(event).getFirstElement();
        if (repo instanceof RepositoryTreeNode) {
            repository.setRepositoryPath(((RepositoryTreeNode) repo).getRepository().getDirectory());
        }
 
        List<String> fileList = repository.getConflictingFiles();
        if (fileList == null) {
            fileList = new ArrayList<String>();
        }
        FileToMergeSelectDialog dialog = new FileToMergeSelectDialog(new Shell(),
                SWT.DIALOG_TRIM | SWT.APPLICATION_MODAL, repository.getRepositoryPath(), fileList);
        dialog.open();
 
        return null;
    }
 
    private IStructuredSelection getSelectedNodes(ExecutionEvent event) throws ExecutionException {
        ISelection selection = HandlerUtil.getCurrentSelectionChecked(event);
        if (selection instanceof IStructuredSelection)
            return ((IStructuredSelection) selection);
        else
            return null;
    }
}