com.nextep.designer.synch.ui.jface.CompareAction.java Source code

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Here is the source code for com.nextep.designer.synch.ui.jface.CompareAction.java

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/*******************************************************************************
 * Copyright (c) 2011 neXtep Software and contributors.
 * All rights reserved.
 *
 * This file is part of neXtep designer.
 *
 * NeXtep designer is free software: you can redistribute it 
 * and/or modify it under the terms of the GNU General Public 
 * License as published by the Free Software Foundation, either 
 * version 3 of the License, or any later version.
 *
 * NeXtep designer is distributed in the hope that it will be 
 * useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Foobar.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Contributors:
 *     neXtep Softwares - initial API and implementation
 *******************************************************************************/
package com.nextep.designer.synch.ui.jface;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.PartInitException;
import com.nextep.designer.synch.ui.SynchUIMessages;
import com.nextep.designer.vcs.model.IComparisonItem;
import com.nextep.designer.vcs.ui.VCSUIPlugin;
import com.nextep.designer.vcs.ui.compare.IComparisonEditorProvider;

public class CompareAction extends Action {

    private IWorkbenchPage page;
    private ISelectionProvider selectionProvider;
    private final static Log LOGGER = LogFactory.getLog(CompareAction.class);

    public CompareAction(IWorkbenchPage page, ISelectionProvider selProvider) {
        super(SynchUIMessages.getString("synch.navigator.openComparison")); //$NON-NLS-1$
        this.page = page;
        this.selectionProvider = selProvider;
    }

    @Override
    public boolean isEnabled() {
        final ISelection sel = selectionProvider.getSelection();
        if (!sel.isEmpty()) {
            final IStructuredSelection selection = (IStructuredSelection) sel;
            return selection.size() == 1 && selection.getFirstElement() instanceof IComparisonItem;
        }
        return false;
    }

    @Override
    public void run() {
        final IStructuredSelection sel = (IStructuredSelection) selectionProvider.getSelection();
        IComparisonItem compItem = (IComparisonItem) sel.getFirstElement();
        final IComparisonEditorProvider provider = VCSUIPlugin.getComparisonUIManager()
                .getComparisonEditorProvider(compItem.getType());
        try {
            final IEditorInput input = provider.getEditorInput(compItem);
            final String editorId = provider.getEditorId(compItem);
            if (input != null && editorId != null) {
                // Opening our multi editor
                page.openEditor(input, editorId);
            }
        } catch (PartInitException e) {
            LOGGER.error(SynchUIMessages.getString("synch.navigator.openComparisonError") + ": " + e.getMessage(),
                    e);
        }
    }
}