org.bonitasoft.studio.diagram.custom.clipboard.CustomClipboardSupportGlobalActionHandler.java Source code

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Here is the source code for org.bonitasoft.studio.diagram.custom.clipboard.CustomClipboardSupportGlobalActionHandler.java

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/**
 * Copyright (C) 2009 BonitaSoft S.A.
 * BonitaSoft, 31 rue Gustave Eiffel - 38000 Grenoble
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2.0 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.bonitasoft.studio.diagram.custom.clipboard;

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

import org.bonitasoft.studio.model.process.Container;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.gmf.runtime.common.ui.action.global.GlobalActionId;
import org.eclipse.gmf.runtime.common.ui.services.action.global.IGlobalActionContext;
import org.eclipse.gmf.runtime.diagram.ui.editparts.IGraphicalEditPart;
import org.eclipse.gmf.runtime.diagram.ui.parts.IDiagramWorkbenchPart;
import org.eclipse.gmf.runtime.diagram.ui.providers.DiagramGlobalActionHandler;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IWorkbenchPart;

/**
 * @author Romain Bioteau
 *
 */
public class CustomClipboardSupportGlobalActionHandler extends DiagramGlobalActionHandler {

    public CustomClipboardSupportGlobalActionHandler() {
        super();
    }

    @Override
    public boolean canHandle(IGlobalActionContext cntxt) {

        /* Check if the active part is a IDiagramWorkbenchPart */
        IWorkbenchPart part = cntxt.getActivePart();
        if (!(part instanceof IDiagramWorkbenchPart)) {
            return false;
        }

        /* Check if the selection is a structured selection */
        if (!(cntxt.getSelection() instanceof IStructuredSelection)) {
            return false;
        }

        /* Check the action id */
        String actionId = cntxt.getActionId();
        if (actionId.equals(GlobalActionId.COPY)) {
            return canCopy(cntxt);
        } else if (actionId.equals(GlobalActionId.CUT)) {
            return canCut(cntxt);
        } else if (actionId.equals(GlobalActionId.PASTE)) {
            return canPaste(cntxt);
        }
        return false;
    }

    @Override
    protected org.eclipse.gmf.runtime.common.core.command.ICommand getCopyCommand(IGlobalActionContext cntxt,
            IDiagramWorkbenchPart diagramPart, final boolean isUndoable) {

        return new CustomCopyCommand("Copy", getSelectedEditParts(cntxt));
    }

    protected org.eclipse.gmf.runtime.common.core.command.ICommand getCutCommand(IGlobalActionContext cntxt,
            IDiagramWorkbenchPart diagramPart) {
        return new CustomCutCommand("Cut", getSelectedEditParts(cntxt));
    }

    @Override
    public org.eclipse.gmf.runtime.common.core.command.ICommand getCommand(IGlobalActionContext cntxt) {
        /* Check if the active part is a IDiagramWorkbenchPart */
        IWorkbenchPart part = cntxt.getActivePart();
        if (!(part instanceof IDiagramWorkbenchPart)) {
            return null;
        }

        /* Get the model operation context */
        IDiagramWorkbenchPart diagramPart = (IDiagramWorkbenchPart) part;

        /* Create a command */
        org.eclipse.gmf.runtime.common.core.command.ICommand command = null;

        /* Check the action id */
        String actionId = cntxt.getActionId();
        if (actionId.equals(GlobalActionId.DELETE)) {
            super.getCommand(cntxt);
        } else if (actionId.equals(GlobalActionId.COPY)) {
            command = getCopyCommand(cntxt, diagramPart, false);
        } else if (actionId.equals(GlobalActionId.CUT)) {
            command = getCutCommand(cntxt, diagramPart);
        } else if (actionId.equals(GlobalActionId.OPEN)) {
            super.getCommand(cntxt);
        } else if (actionId.equals(GlobalActionId.PASTE)) {
            command = getPasteCommand(cntxt, diagramPart);
        } else if (actionId.equals(GlobalActionId.SAVE)) {
            super.getCommand(cntxt);
        } else if (actionId.equals(GlobalActionId.PROPERTIES)) {
            super.getCommand(cntxt);
        }

        return command;

    }

    private org.eclipse.gmf.runtime.common.core.command.ICommand getPasteCommand(IGlobalActionContext cntxt,
            IDiagramWorkbenchPart diagramPart) {
        return new CustomPasteCommand("Paste", getSelectedEditParts(cntxt).get(0));

    }

    /**
     * @return
     */
    private List<IGraphicalEditPart> getSelectedEditParts(IGlobalActionContext cntxt) {
        List<IGraphicalEditPart> res = new ArrayList<IGraphicalEditPart>();
        IStructuredSelection selection = (IStructuredSelection) cntxt.getSelection();
        for (Object item : selection.toList()) {
            if (item instanceof IGraphicalEditPart) {
                res.add((IGraphicalEditPart) item);
            }
        }
        return res;
    }

    @Override
    protected boolean canPaste(IGlobalActionContext cntxt) {
        /* Check if the clipboard has data for the drawing surface */
        final List<IGraphicalEditPart> selectedEditParts = getSelectedEditParts(cntxt);
        return Clipboard.hasThingsToCopy() && allInSameContainer(selectedEditParts);
    }

    /**
     * @param selectedEditParts
     * @return
     */
    private boolean allInSameContainer(List<IGraphicalEditPart> selectedEditParts) {
        Container commonContainer = null;
        for (IGraphicalEditPart part : selectedEditParts) {
            EObject semantic = part.resolveSemanticElement();
            Container container = getContainer(semantic);
            if (commonContainer == null) {
                commonContainer = container;
            } else if (!commonContainer.equals(container)) {
                return false;
            }
        }
        return true;
    }

    /**
     * @param semantic
     * @return
     */
    private Container getContainer(EObject semantic) {
        while (semantic != null && !(semantic instanceof Container)) {
            semantic = semantic.eContainer();
        }
        return (Container) semantic;
    }

}