com.nokia.sdt.uidesigner.ui.actions.PasteActionCommandHandler.java Source code

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Here is the source code for com.nokia.sdt.uidesigner.ui.actions.PasteActionCommandHandler.java

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/*
* Copyright (c) 2005 Nokia Corporation and/or its subsidiary(-ies).
* All rights reserved.
* This component and the accompanying materials are made available
* under the terms of the License "Eclipse Public License v1.0"
* which accompanies this distribution, and is available
* at the URL "http://www.eclipse.org/legal/epl-v10.html".
*
* Initial Contributors:
* Nokia Corporation - initial contribution.
*
* Contributors:
*
* Description: 
*
*/

package com.nokia.sdt.uidesigner.ui.actions;

import com.nokia.sdt.datamodel.adapter.IComponentInstance;
import com.nokia.sdt.editor.IDesignerEditor;
import com.nokia.sdt.uidesigner.ui.UIDesignerPlugin;
import com.nokia.sdt.uidesigner.ui.utils.*;
import com.nokia.cpp.internal.api.utils.core.*;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.MultiStatus;
import org.eclipse.emf.common.command.Command;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.edit.ui.action.PasteAction;
import org.eclipse.jface.viewers.IStructuredSelection;

import java.util.*;

public class PasteActionCommandHandler extends PasteAction {

    private CommandHandlerHelper helper;

    /**
     * @param editor the owner of the data model
     */
    public PasteActionCommandHandler(IDesignerEditor editor) {
        super(editor.getDataModel().getEditingDomain());
        helper = new CommandHandlerHelper(editor);
        helper.addSelectionChangedListener(this);
    }

    public void run() {
        IStructuredSelection structuredSelection = getStructuredSelection();
        Collection selectedObjects = helper.makeEObjectList(structuredSelection.toList());
        EObject owner = null;

        if (selectedObjects.size() > 1) {
            owner = EditorUtils.getCommonDirectParent(selectedObjects);
        } else if (!selectedObjects.isEmpty()) { // size == 1
            owner = (EObject) selectedObjects.iterator().next();
            // special case where owner is not a container, use the parent of the owner
            if (Adapters.getContainer(owner) == null) {
                owner = Adapters.getComponentInstance(owner).getParent();
            }
        }

        // try the content container, first
        if (owner == null) {
            owner = helper.editor.getDisplayModel().getContentContainer();
        }

        // else try the root container
        if (owner == null) {
            owner = helper.getRootContainer();
        }

        // preflight, in case we need to try the parent
        Collection clipboard = helper.editor.getDataModel().getEditingDomain().getClipboard();
        List<IStatus> statuses = new ArrayList();
        if (!EditorUtils.canContainAtLeastOneComponent(owner, clipboard, statuses)) {
            // if can't paste even one object, try the owner's parent (just one level)
            IComponentInstance ownerInstance = Adapters.getComponentInstance(owner);
            EObject parent = null;
            if (ownerInstance != null)
                parent = ownerInstance.getParent();
            if (parent != null)
                owner = parent;
            if (!EditorUtils.canContainAtLeastOneComponent(owner, clipboard, statuses)) {
                StatusBuilder builder = new StatusBuilder(UIDesignerPlugin.getDefault());
                MultiStatus multiStatus = builder.createMultiStatus(
                        Strings.getString("PasteActionCommandHandler.CouldNotAddComponentsError"), new Object[0]); //$NON-NLS-1$
                for (Iterator<IStatus> iter = statuses.iterator(); iter.hasNext();)
                    multiStatus.add(iter.next());
                Logging.showErrorDialog(null, Strings.getString("PasteActionCommandHandler.PasteFailedTitle"), //$NON-NLS-1$
                        multiStatus);
                owner = null;
            }
        }

        if (owner != null) {
            Command dataModelCommand = getDataModelCommand(owner);
            helper.doExecute(dataModelCommand);
            EditorUtils.setSelectionToAffectedObjects(helper.editor, dataModelCommand.getAffectedObjects());
        }
    }

    public Command createCommand(Collection selection) {
        // always pass the root container as the owner to enable the paste action
        // then preflight the actual selection in run() with the actual selection
        // to advise the user if there is a problem
        return getDataModelCommand(helper.getRootContainer());
    }

    private Command getDataModelCommand(EObject owner) {
        return helper.getDataModel().createPasteComponentInstancesCommand(owner);
    }
}