eu.geclipse.ui.internal.actions.FileActions.java Source code

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Here is the source code for eu.geclipse.ui.internal.actions.FileActions.java

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/*****************************************************************************
 * Copyright (c) 2006, 2007 g-Eclipse Consortium 
 * 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
 *
 * Initial development of the original code was made for the
 * g-Eclipse project founded by European Union
 * project number: FP6-IST-034327  http://www.geclipse.eu/
 *
 * Contributors:
 *    Mathias Stuempert - initial API and implementation
 *****************************************************************************/

package eu.geclipse.ui.internal.actions;

import org.eclipse.jface.action.IMenuManager;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.swt.dnd.Clipboard;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.IWorkbenchSite;
import org.eclipse.ui.actions.ActionGroup;
import org.eclipse.ui.actions.RenameResourceAction;
import org.eclipse.ui.navigator.ICommonMenuConstants;

import eu.geclipse.ui.views.GridModelViewPart;

/**
 * Action group holding all file related actions like copy, paste and delete.
 */
public class FileActions extends ActionGroup {

    /**
     * Clipboard used for the copy and paste mechanism.
     */
    private Clipboard clipboard;

    /**
     * The workbench site for which to create this action.
     */
    private IWorkbenchSite site;

    /**
     * The copy action of the copy and paste mechanism.
     */
    private CopyAction copyAction;

    /**
     * The paste action of the copy and paste mechanism.
     */
    private PasteAction pasteAction;

    /**
     * The action for deleting resources in the workspace.
     */
    private DeleteGridElementAction deleteElementAction;

    /**
     * The action for renaming resources in the workspace.
     */
    private RenameResourceAction renameAction;

    /**
     * Construct a new file action group for the specified
     * {@link GridModelViewPart}.
     * 
     * @param view The {@link GridModelViewPart} for which to create
     * this action group.
     */
    public FileActions(final GridModelViewPart view) {

        this.site = view.getSite();
        Shell shell = this.site.getShell();
        ISelectionProvider provider = this.site.getSelectionProvider();

        this.clipboard = new Clipboard(shell.getDisplay());

        this.copyAction = new CopyAction(this.clipboard);
        this.pasteAction = new PasteAction(this.clipboard);
        this.deleteElementAction = new DeleteGridElementAction(shell);
        this.renameAction = new RenameResourceAction(shell);

        provider.addSelectionChangedListener(this.copyAction);
        provider.addSelectionChangedListener(this.pasteAction);
        provider.addSelectionChangedListener(this.deleteElementAction);
        provider.addSelectionChangedListener(this.renameAction);

        ISelection selection = provider.getSelection();

        if ((selection == null) || !(selection instanceof IStructuredSelection)) {
            selection = StructuredSelection.EMPTY;
        }

        this.copyAction.selectionChanged((IStructuredSelection) selection);
        this.pasteAction.selectionChanged((IStructuredSelection) selection);
        this.deleteElementAction.selectionChanged((IStructuredSelection) selection);
        this.renameAction.selectionChanged((IStructuredSelection) selection);

    }

    /* (non-Javadoc)
     * @see org.eclipse.ui.actions.ActionGroup#dispose()
     */
    @Override
    public void dispose() {
        ISelectionProvider provider = this.site.getSelectionProvider();
        provider.removeSelectionChangedListener(this.copyAction);
        provider.removeSelectionChangedListener(this.pasteAction);
        provider.removeSelectionChangedListener(this.deleteElementAction);
        provider.removeSelectionChangedListener(this.renameAction);
        this.clipboard.dispose();
    }

    /* (non-Javadoc)
     * @see org.eclipse.ui.actions.ActionGroup#fillContextMenu(org.eclipse.jface.action.IMenuManager)
     */
    @Override
    public void fillContextMenu(final IMenuManager menu) {
        if (this.deleteElementAction.isEnabled()) {
            menu.appendToGroup(ICommonMenuConstants.GROUP_EDIT, this.copyAction);
            menu.appendToGroup(ICommonMenuConstants.GROUP_EDIT, this.pasteAction);
            menu.appendToGroup(ICommonMenuConstants.GROUP_EDIT, this.deleteElementAction);
            menu.appendToGroup(ICommonMenuConstants.GROUP_EDIT, this.renameAction);
        }
        super.fillContextMenu(menu);
    }

    /* (non-Javadoc)
     * @see org.eclipse.ui.actions.ActionGroup#updateActionBars()
     */
    @Override
    public void updateActionBars() {
        super.updateActionBars();

        IStructuredSelection selection = null;

        if (getContext() != null && getContext().getSelection() instanceof IStructuredSelection) {
            selection = (IStructuredSelection) getContext().getSelection();
        }

        this.copyAction.selectionChanged(selection);
        this.pasteAction.selectionChanged(selection);
        this.deleteElementAction.selectionChanged(selection);
        this.renameAction.selectionChanged(selection);
    }

}