com.bluexml.side.form.common.RestoreFormElementAction.java Source code

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Here is the source code for com.bluexml.side.form.common.RestoreFormElementAction.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.form.common;

import java.util.Iterator;

import org.eclipse.emf.common.command.Command;
import org.eclipse.emf.common.command.CompoundCommand;
import org.eclipse.emf.edit.command.AddCommand;
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.form.FormClass;
import com.bluexml.side.form.FormElement;
import com.bluexml.side.form.FormPackage;

public class RestoreFormElementAction extends Action implements ISelectionChangedListener {
    protected FormClass selectedObject;
    protected FormElement toRestore;
    private EditingDomain domain;

    public RestoreFormElementAction(FormElement f, FormClass cl) {
        super();
        toRestore = f;
        selectedObject = cl;
    }

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

    public boolean updateSelection(IStructuredSelection selection) {
        selectedObject = null;
        for (Iterator<?> objects = selection.iterator(); objects.hasNext();) {
            Object object = objects.next();
            if (object instanceof FormClass) {
                selectedObject = (FormClass) object;
            } else {
                return false;
            }
        }

        return selectedObject != null;
    }

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

    private void doAction() {
        CompoundCommand cc = new CompoundCommand();
        Command addCmd = AddCommand.create(domain, selectedObject, FormPackage.eINSTANCE.getFormGroup_Children(),
                toRestore);
        cc.append(addCmd);
        domain.getCommandStack().execute(cc);
    }

    @Override
    public String getText() {
        return toRestore.getLabel();
    }

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