com.mentor.nucleus.bp.ui.graphics.actions.CanvasCutAction.java Source code

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Here is the source code for com.mentor.nucleus.bp.ui.graphics.actions.CanvasCutAction.java

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//========================================================================
//
//File:      $RCSfile: CanvasCutAction.java,v $
//Version:   $Revision: 1.7 $
//Modified:  $Date: 2013/01/10 23:05:57 $
//
//(c) Copyright 2007-2014 by Mentor Graphics Corp. All rights reserved.
//
//========================================================================
// Licensed under the Apache License, Version 2.0 (the "License"); you may not 
// use this file except in compliance with the License.  You may obtain a copy 
// of the License at
//
//       http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software 
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   See the 
// License for the specific language governing permissions and limitations under
// the License.
//======================================================================== 
//
package com.mentor.nucleus.bp.ui.graphics.actions;

import java.util.Iterator;

import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.swt.dnd.ImageTransfer;
import org.eclipse.swt.dnd.Transfer;

import com.mentor.nucleus.bp.core.common.NonRootModelElement;
import com.mentor.nucleus.bp.core.common.TransactionManager;
import com.mentor.nucleus.bp.core.ui.CutAction;
import com.mentor.nucleus.bp.core.ui.DeleteAction;
import com.mentor.nucleus.bp.core.ui.Selection;
import com.mentor.nucleus.bp.ui.graphics.editor.GraphicalEditor;

public class CanvasCutAction extends CutAction {

    private GraphicalEditor m_editor;

    public CanvasCutAction(GraphicalEditor editor) {
        m_editor = editor;
    }

    public TransactionManager getTransactionManager() {
        return ((NonRootModelElement) m_editor.getModel().getRepresents()).getTransactionManager();
    }

    public NonRootModelElement[] getElementsToBeCopied(boolean includeGraphics) {
        return CanvasCopyAction.getCopiableElements(includeGraphics, m_editor.getModel());
    }

    /**
     * Determines whether or not the selection
     * contains elements which are may be cut
     */
    public boolean isSelectionCuttable() {
        if (m_editor == null)
            return false;
        boolean copiable = CanvasCopyAction.isSelectionCopiable(m_editor.getModel());
        // only ask the delete action if the selection contains only
        // NonRootModelElement represented graphics
        if (selectionContainsOnlyCoreElements()) {
            if (!DeleteAction.canDeleteAction()) {
                copiable = false;
            }
        } else {
            return false;
        }
        return copiable;
    }

    public static boolean selectionContainsOnlyCoreElements() {
        IStructuredSelection selection = (IStructuredSelection) Selection.getInstance().getStructuredSelection();
        for (Iterator<?> iterator = selection.iterator(); iterator.hasNext();) {
            Object selected = iterator.next();
            if (!(selected instanceof NonRootModelElement)) {
                return false;
            }
        }
        return true;
    }

    @Override
    public boolean isEnabled() {
        return isSelectionCuttable();
    }

    @Override
    protected Object getSecondaryClipboardData() {
        return CanvasCopyAction.getImageDataForSelection(m_editor);
    }

    @Override
    protected Transfer getSecondaryTransfer() {
        return ImageTransfer.getInstance();
    }

    @Override
    protected boolean onlyIncludeSecondaryData() {
        return false;
    }

}