com.bluexml.side.form.clazz.MoveSiblingUp.java Source code

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Here is the source code for com.bluexml.side.form.clazz.MoveSiblingUp.java

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/*
Copyright (C) 2007-20013  BlueXML - www.bluexml.com
    
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero 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 Affero General Public License for more details.
    
You should have received a copy of the GNU Affero General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
package com.bluexml.side.form.clazz;

import java.util.Iterator;

import org.eclipse.emf.common.util.EList;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.edit.command.MoveCommand;
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.FormCollection;
import com.bluexml.side.form.FormElement;
import com.bluexml.side.form.FormGroup;
import com.bluexml.side.form.FormUI;

public class MoveSiblingUp extends Action implements ISelectionChangedListener {

    protected EObject selectedObject;
    private EditingDomain domain;

    @Override
    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 FormElement) {
                selectedObject = (EObject) object;
            } else {
                return false;
            }
        }

        return selectedObject != null;
    }

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

    private void doAction(FormElement fc) {
        int newIndex = 0;
        Object value = fc;

        EList<?> list = null;

        EObject eContainer = fc.eContainer();
        if (eContainer instanceof FormGroup) {
            FormGroup parent = (FormGroup) eContainer;
            list = parent.getChildren();
        } else if (eContainer instanceof FormCollection) {
            FormCollection fcc = (FormCollection) eContainer;
            list = fcc.getForms();
        }

        newIndex = getNewIndex(fc, list);

        MoveCommand command = new MoveCommand(domain, list, value, newIndex);
        domain.getCommandStack().execute(command);
    }

    public int getNewIndex(FormElement fc, EList<?> list) {
        int newIndex;
        int indexOf = list.indexOf(fc);
        newIndex = indexOf > 0 ? indexOf - 1 : 0;
        return newIndex;
    }

    @Override
    public String getText() {
        return FormUI.Messages.getString("Actions_moveSiblingUp");
    }

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