com.bluexml.side.view.edit.ui.actions.MergeCols.java Source code

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Here is the source code for com.bluexml.side.view.edit.ui.actions.MergeCols.java

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/*
Copyright (C) 2007-2011  BlueXML - www.bluexml.com
    
This program 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
(at your option) any later version.
    
This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
    
*/

package com.bluexml.side.view.edit.ui.actions;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.plugin.EcorePlugin;
import org.eclipse.emf.edit.domain.EditingDomain;
import org.eclipse.emf.edit.domain.IEditingDomainProvider;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.ui.IWorkbenchPart;

import com.bluexml.side.view.Col;
import com.bluexml.side.view.FieldContainer;
import com.bluexml.side.view.edit.ui.utils.InternalModification;
import com.bluexml.side.view.edit.ui.utils.model.ViewUtils;

public class MergeCols extends Action implements ISelectionChangedListener {

    protected List<Col> selectedObject;
    protected EObject container;
    private EditingDomain domain;

    public void selectionChanged(SelectionChangedEvent event) {
        if (event.getSelection() instanceof IStructuredSelection) {
            setEnabled(updateSelection((IStructuredSelection) event.getSelection()));
        } else {
            setEnabled(false);
        }
    }

    public boolean updateSelection(IStructuredSelection selection) {
        selectedObject = new ArrayList<Col>();
        for (Iterator<?> objects = selection.iterator(); objects.hasNext();) {
            Object object = objects.next();
            if (object instanceof Col) {
                // We add cols having the same parent only
                Col col = (Col) object;
                if (selectedObject.size() > 0 && selectedObject.get(0).eContainer().equals(col.eContainer())) {
                    selectedObject.add(col);
                } else if (selectedObject.size() == 0) {
                    selectedObject.add((Col) object);
                    container = col.eContainer();
                }
            } else {
                return false;
            }
        }
        return selectedObject.size() > 1;
    }

    @Override
    public void run() {
        super.run();
        doAction(selectedObject);
    }

    private void doAction(List<Col> lc) {
        InternalModification.dontMoveToDisabled();
        try {
            domain.getCommandStack()
                    .execute(ViewUtils.getCommandForColMerge(selectedObject, (FieldContainer) container, domain));
        } catch (Exception e) {
            e.printStackTrace();
            EcorePlugin.INSTANCE.log("Merge failed : " + e.getMessage());
            e.printStackTrace();
            InternalModification.moveToDisabled();
        }
        InternalModification.moveToDisabled();
    }

    @Override
    public String getText() {
        return "Merge";
    }

    public void setActiveWorkbenchPart(IWorkbenchPart workbenchPart) {
        if (workbenchPart instanceof IEditingDomainProvider) {
            domain = ((IEditingDomainProvider) workbenchPart).getEditingDomain();
        }
    }

}