ext.org.eclipse.jdt.internal.ui.actions.NewWizardsActionGroup.java Source code

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Here is the source code for ext.org.eclipse.jdt.internal.ui.actions.NewWizardsActionGroup.java

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/*******************************************************************************
 * Copyright (c) 2000, 2011 IBM Corporation and others.
 * 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package ext.org.eclipse.jdt.internal.ui.actions;

import java.util.Iterator;
import java.util.List;

import org.eclipse.core.resources.IResource;

import org.eclipse.jface.action.IMenuManager;
import org.eclipse.jface.action.MenuManager;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;

import org.eclipse.ui.IWorkbenchSite;
import org.eclipse.ui.IWorkingSet;
import org.eclipse.ui.actions.ActionGroup;
import org.eclipse.ui.actions.NewWizardMenu;

import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.ui.IContextMenuConstants;

import ext.org.eclipse.jdt.internal.ui.workingsets.IWorkingSetIDs;

/**
 * Action group that adds the 'new' menu to a context menu.
 * <p>
 * This class may be instantiated; it is not intended to be subclassed.
 * </p>
 *
 * @since 2.1
 */
public class NewWizardsActionGroup extends ActionGroup {

    private IWorkbenchSite fSite;

    /**
     * Creates a new <code>NewWizardsActionGroup</code>. The group requires
     * that the selection provided by the part's selection provider is of type <code>
     * org.eclipse.jface.viewers.IStructuredSelection</code>.
     *
     * @param site the view part that owns this action group
     */
    public NewWizardsActionGroup(IWorkbenchSite site) {
        fSite = site;
    }

    /* (non-Javadoc)
     * Method declared in ActionGroup
     */
    @Override
    public void fillContextMenu(IMenuManager menu) {
        super.fillContextMenu(menu);

        ISelection selection = getContext().getSelection();
        if (selection instanceof IStructuredSelection) {
            if (canEnable((IStructuredSelection) selection)) {
                MenuManager newMenu = new MenuManager(ActionMessages.NewWizardsActionGroup_new);
                menu.appendToGroup(IContextMenuConstants.GROUP_NEW, newMenu);
                newMenu.add(new NewWizardMenu(fSite.getWorkbenchWindow()));
            }
        }

    }

    private boolean canEnable(IStructuredSelection sel) {
        if (sel.size() == 0)
            return true;

        List<?> list = sel.toList();
        for (Iterator<?> iterator = list.iterator(); iterator.hasNext();) {
            if (!isNewTarget(iterator.next()))
                return false;
        }

        return true;
    }

    private boolean isNewTarget(Object element) {
        if (element == null)
            return true;
        if (element instanceof IResource) {
            return true;
        }
        if (element instanceof IJavaElement) {
            int type = ((IJavaElement) element).getElementType();
            return type == IJavaElement.JAVA_PROJECT || type == IJavaElement.PACKAGE_FRAGMENT_ROOT
                    || type == IJavaElement.PACKAGE_FRAGMENT || type == IJavaElement.COMPILATION_UNIT
                    || type == IJavaElement.TYPE;
        }
        if (element instanceof IWorkingSet) {
            String workingSetId = ((IWorkingSet) element).getId();
            return IWorkingSetIDs.JAVA.equals(workingSetId) || IWorkingSetIDs.RESOURCE.equals(workingSetId)
                    || IWorkingSetIDs.OTHERS.equals(workingSetId);
        }
        return false;
    }

}