org.eclipse.emf.compare.ide.ui.internal.handler.SelectAncestorDialog.java Source code

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Here is the source code for org.eclipse.emf.compare.ide.ui.internal.handler.SelectAncestorDialog.java

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/*******************************************************************************
 * Copyright (c) 2000, 2016 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *     Matt McCutchen (hashproduct+eclipse@gmail.com) - Bug 35390 Three-way compare cannot select (mis-selects) )ancestor resource
 *     Aleksandra Wozniak (aleksandra.k.wozniak@gmail.com) - Bug 239959
 *     Mikael Barbero (mikael.barbero@obeo.fr) - adapted to EMF Compare
 *******************************************************************************/
package org.eclipse.emf.compare.ide.ui.internal.handler;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import org.eclipse.compare.internal.CompareMessages;
import org.eclipse.core.runtime.Platform;
import org.eclipse.emf.common.notify.AdapterFactory;
import org.eclipse.emf.compare.ide.ui.source.IEMFComparisonSource;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.util.EcoreUtil;
import org.eclipse.emf.edit.provider.IItemLabelProvider;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.model.IWorkbenchAdapter;

/* Initially copy/pasted from org.eclipse.compare.internal.ResourceCompareInput.SelectAncestorDialog. */
public class SelectAncestorDialog<T> extends MessageDialog {
    private List<T> elements;

    T originElement;

    T leftElement;

    T rightElement;

    private Button[] buttons;

    private final AdapterFactory adapterFactory;

    public SelectAncestorDialog(Shell parentShell, AdapterFactory adapterFactory, T[] theResources) {
        super(parentShell, CompareMessages.SelectAncestorDialog_title, null,
                CompareMessages.SelectAncestorDialog_message, MessageDialog.QUESTION,
                new String[] { IDialogConstants.OK_LABEL, IDialogConstants.CANCEL_LABEL }, 0);
        this.adapterFactory = adapterFactory;
        this.elements = new ArrayList<T>(Arrays.asList(theResources));
    }

    @Override
    protected Control createCustomArea(Composite parent) {
        Composite composite = new Composite(parent, SWT.NONE);
        composite.setLayout(new GridLayout());
        buttons = new Button[3];
        for (int i = 0; i < 3; i++) {
            buttons[i] = new Button(composite, SWT.RADIO);
            buttons[i].addSelectionListener(selectionListener);
            String text = "'" + getText(elements.get(i)) + "'"; //$NON-NLS-1$ //$NON-NLS-2$
            if (elements.get(i) instanceof EObject) {
                text = text + " (" + EcoreUtil.getURI(((EObject) elements.get(i))) + ")"; //$NON-NLS-1$ //$NON-NLS-2$
            }
            buttons[i].setText(text);
            buttons[i].setFont(parent.getFont());
            // set initial state
            buttons[i].setSelection(i == 0);
        }
        pickOrigin(0);
        return composite;
    }

    private void pickOrigin(int i) {
        originElement = elements.get(i);
        leftElement = elements.get(i == 0 ? 1 : 0);
        rightElement = elements.get(i == 2 ? 1 : 2);
    }

    private SelectionListener selectionListener = new SelectionAdapter() {
        @Override
        public void widgetSelected(SelectionEvent e) {
            Button selectedButton = (Button) e.widget;
            if (!selectedButton.getSelection()) {
                return;
            }
            for (int i = 0; i < 3; i++) {
                if (selectedButton == buttons[i]) {
                    pickOrigin(i);
                }
            }
        }
    };

    private String getText(Object object) {
        IEMFComparisonSource emfComparisonSourceAdapter = (IEMFComparisonSource) Platform.getAdapterManager()
                .getAdapter(object, IEMFComparisonSource.class);
        if (emfComparisonSourceAdapter != null) {
            return emfComparisonSourceAdapter.getName();
        }

        Object itemLabelProvider = adapterFactory.adapt(object, IItemLabelProvider.class);
        if (itemLabelProvider instanceof IItemLabelProvider) {
            return ((IItemLabelProvider) itemLabelProvider).getText(object);
        }

        ILabelProvider labelProvider = (ILabelProvider) Platform.getAdapterManager().getAdapter(object,
                ILabelProvider.class);
        if (labelProvider != null) {
            return labelProvider.getText(object);
        }

        IWorkbenchAdapter workbenchAdapter = (IWorkbenchAdapter) Platform.getAdapterManager().getAdapter(object,
                IWorkbenchAdapter.class);
        if (workbenchAdapter != null) {
            return workbenchAdapter.getLabel(object);
        }

        return object.toString();
    }
}