org.eclipse.team.internal.ccvs.ui.mappings.ModelReplaceOperation.java Source code

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Here is the source code for org.eclipse.team.internal.ccvs.ui.mappings.ModelReplaceOperation.java

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/*******************************************************************************
 * Copyright (c) 2005, 2006 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
 *******************************************************************************/
package org.eclipse.team.internal.ccvs.ui.mappings;

import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.resources.mapping.ResourceMapping;
import org.eclipse.core.runtime.*;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.swt.widgets.Display;
import org.eclipse.team.core.diff.*;
import org.eclipse.team.core.mapping.IMergeContext;
import org.eclipse.team.core.mapping.ISynchronizationContext;
import org.eclipse.team.internal.ccvs.ui.CVSUIMessages;
import org.eclipse.team.internal.ccvs.ui.CVSUIPlugin;
import org.eclipse.ui.IWorkbenchPart;

public class ModelReplaceOperation extends ModelUpdateOperation {

    boolean hasPrompted = false;

    public ModelReplaceOperation(IWorkbenchPart part, ResourceMapping[] selectedMappings, boolean consultModels) {
        super(part, selectedMappings, consultModels);
    }

    /* (non-Javadoc)
     * @see org.eclipse.team.ui.TeamOperation#getJobName()
     */
    protected String getJobName() {
        return CVSUIMessages.ReplaceOperation_taskName;
    }

    /* (non-Javadoc)
     * @see org.eclipse.team.ui.operations.ResourceMappingMergeOperation#isAttemptHeadlessMerge()
     */
    protected boolean isAttemptHeadlessMerge() {
        return true;
    }

    /* (non-Javadoc)
     * @see org.eclipse.team.ui.operations.ResourceMappingMergeOperation#hasChangesOfInterest()
     */
    protected boolean hasChangesOfInterest() {
        IMergeContext context = (IMergeContext) getContext();
        return !context.getDiffTree().isEmpty();
    }

    /* (non-Javadoc)
     * @see org.eclipse.team.internal.ccvs.ui.mappings.ModelUpdateOperation#getMergeType()
     */
    protected int getMergeType() {
        return ISynchronizationContext.TWO_WAY;
    }

    /* (non-Javadoc)
     * @see org.eclipse.team.ui.operations.ResourceMappingMergeOperation#performMerge(org.eclipse.core.runtime.IProgressMonitor)
     */
    protected IStatus performMerge(IProgressMonitor monitor) throws CoreException {
        if (!hasLocalChanges() || promptForOverwrite()) {
            return super.performMerge(monitor);
        }
        return new Status(IStatus.ERROR, CVSUIPlugin.ID, REQUEST_PREVIEW, "", null); //$NON-NLS-1$
    }

    /*
     * Mde porotected to be overriden by test cases.
     */
    protected boolean promptForOverwrite() {
        if (hasPrompted)
            return true;
        final int[] result = new int[] { 1 };
        Display.getDefault().syncExec(new Runnable() {
            public void run() {
                MessageDialog dialog = new MessageDialog(getShell(), CVSUIMessages.ModelReplaceOperation_0, null, // accept
                        // the
                        // default
                        // window
                        // icon
                        CVSUIMessages.ModelReplaceOperation_1, MessageDialog.QUESTION,
                        new String[] { CVSUIMessages.ModelReplaceOperation_2, CVSUIMessages.ModelReplaceOperation_3,
                                IDialogConstants.CANCEL_LABEL },
                        result[0]); // preview is the default

                result[0] = dialog.open();

            };
        });
        if (result[0] == 2)
            throw new OperationCanceledException();
        hasPrompted = true;
        return result[0] == 0;
    }

    private boolean hasLocalChanges() {
        return getContext().getDiffTree().hasMatchingDiffs(ResourcesPlugin.getWorkspace().getRoot().getFullPath(),
                new FastDiffFilter() {
                    public boolean select(IDiff node) {
                        if (node instanceof IThreeWayDiff) {
                            IThreeWayDiff twd = (IThreeWayDiff) node;
                            int direction = twd.getDirection();
                            if (direction == IThreeWayDiff.OUTGOING || direction == IThreeWayDiff.CONFLICTING) {
                                return true;
                            }
                        } else {
                            // Return true for any two-way change
                            return true;
                        }
                        return false;
                    }
                });
    }
}