com.vectrace.MercurialEclipse.synchronize.actions.CreateNewChangesetSynchronizeAction.java Source code

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Here is the source code for com.vectrace.MercurialEclipse.synchronize.actions.CreateNewChangesetSynchronizeAction.java

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/*******************************************************************************
 * Copyright (c) 2011 Andrei Loskutov.
 * 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:
 *       Andrei Loskutov - implementation
 *       Amenel Voglozin - changes: Create New Change Set is now possible on any child of Uncommitted
 *******************************************************************************/
package com.vectrace.MercurialEclipse.synchronize.actions;

import java.lang.reflect.InvocationTargetException;

import org.eclipse.compare.structuremergeviewer.IDiffElement;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jface.viewers.ContentViewer;
import org.eclipse.jface.viewers.IDecoration;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.team.ui.synchronize.ISynchronizePageConfiguration;
import org.eclipse.team.ui.synchronize.SynchronizeModelAction;
import org.eclipse.team.ui.synchronize.SynchronizeModelOperation;
import org.eclipse.ui.navigator.CommonViewer;

import com.vectrace.MercurialEclipse.MercurialEclipsePlugin;
import com.vectrace.MercurialEclipse.model.FileFromChangeSet;
import com.vectrace.MercurialEclipse.model.JHgChangeSet;
import com.vectrace.MercurialEclipse.model.PathFromChangeSet;
import com.vectrace.MercurialEclipse.model.WorkingChangeSet;
import com.vectrace.MercurialEclipse.synchronize.cs.HgChangeSetContentProvider;
import com.vectrace.MercurialEclipse.synchronize.cs.HgChangeSetContentProvider.IUncommitted;
import com.vectrace.MercurialEclipse.synchronize.cs.UncommittedChangesetGroup;

/**
 * Creates new empty uncommitted changeset with default name
 */
public class CreateNewChangesetSynchronizeAction extends SynchronizeModelAction {

    private static final String ID = "hg.createNewChangeset"; //$NON-NLS-1$

    public CreateNewChangesetSynchronizeAction(String text, ISynchronizePageConfiguration configuration,
            ISelectionProvider selectionProvider) {
        super(text, configuration, selectionProvider);
        setId(ID);
        setImageDescriptor(MercurialEclipsePlugin.getImageDescriptor("elcl16/uncommitted_cs.gif", "ovr/add_ovr.gif",
                IDecoration.TOP_RIGHT));
    }

    @Override
    protected SynchronizeModelOperation getSubscriberOperation(final ISynchronizePageConfiguration configuration,
            IDiffElement[] elements) {
        IStructuredSelection sel = getStructuredSelection();
        if (isSupported(sel.toArray())) {
            return new SynchronizeModelOperation(configuration, elements) {

                public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {
                    Viewer viewer = configuration.getPage().getViewer();
                    if (!(viewer instanceof ContentViewer)) {
                        return;
                    }
                    CommonViewer commonViewer = (CommonViewer) viewer;
                    final HgChangeSetContentProvider csProvider = OpenAction
                            .getProvider(commonViewer.getNavigatorContentService());
                    IUncommitted uc = csProvider.getUncommittedEntry();

                    if (uc instanceof UncommittedChangesetGroup) {
                        ((UncommittedChangesetGroup) uc).create(new IFile[0]);
                    } else {
                        MercurialEclipsePlugin.logError("Unexped invocation of CreateNewChangesetSynchronizeAction",
                                new IllegalStateException());
                    }
                }
            };
        }
        return null;
    }

    @Override
    protected boolean updateSelection(IStructuredSelection selection) {
        boolean updateSelection = super.updateSelection(selection);
        if (!updateSelection) {
            Object[] array = selection.toArray();
            return isSupported(array);
        }
        return updateSelection;
    }

    /**
     * Tells whether this action can be performed (and enabled) for the given selection. This will
     * be positive if and only if all objects have the "Uncommitted" top-level changeset group as
     * their parent.
     * <p>
     * A selected object can be ("OK" means that the object's ancestry goes back to Uncommitted as
     * its top-level parent):
     * <ul>
     * <li>A top-level changeset group (ie Uncommitted OK, Incoming NOK or Outgoing NOK)
     * <li>A workspace changeset (aka WorkingChangeSet): OK
     * <li>A repository changeset (under Incoming or Outgoing): NOK
     * <li>A folder (aka PathFromChangeSet  OK if the parent is a workspace change set)
     * <li>A file (aka FileFromChangeSet  OK if its parent changeset is a workspace changeset)
     * </ul>
     *
     * @param selectedObjects
     *            The objects selected in the Synchronize view ("Enable local changesets" is
     *            necessarily activated)
     * @return <code>true</code> if all objects have the uncommitted changeset group as their
     *         parent.
     */
    protected static boolean isSupported(Object[] selectedObjects) {
        if (selectedObjects.length == 0) {
            return false;
        }

        for (Object object : selectedObjects) {
            if (object instanceof JHgChangeSet) {
                return false;
            }
            if (object instanceof UncommittedChangesetGroup || object instanceof WorkingChangeSet) {
                continue;
            } else if (object instanceof FileFromChangeSet) {
                FileFromChangeSet file = (FileFromChangeSet) object;
                if (!(file.getChangeset() instanceof WorkingChangeSet)) {
                    return false;
                }
            } else if (object instanceof PathFromChangeSet) {
                Object parent = ((PathFromChangeSet) object).getParent();
                if (parent instanceof UncommittedChangesetGroup || parent instanceof WorkingChangeSet) {
                    continue;
                }
            } else {
                return false;
            }
        }

        return true;
    }

}