org.eclipse.linuxtools.systemtap.ui.dashboard.actions.hidden.GetSelectedModule.java Source code

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Here is the source code for org.eclipse.linuxtools.systemtap.ui.dashboard.actions.hidden.GetSelectedModule.java

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/*******************************************************************************
 * Copyright (c) 2006 IBM Corporation.
 * 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 - Jeff Briggs, Henry Hughes, Ryan Morse, Anithra P J, Anithra P J
 *******************************************************************************/

package org.eclipse.linuxtools.systemtap.ui.dashboard.actions.hidden;

import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.ui.IViewPart;
import org.eclipse.ui.PlatformUI;

import org.eclipse.linuxtools.systemtap.ui.structures.TreeNode;
import org.eclipse.linuxtools.systemtap.ui.dashboard.structures.ActiveModuleData;
import org.eclipse.linuxtools.systemtap.ui.dashboard.structures.DashboardModule;
import org.eclipse.linuxtools.systemtap.ui.dashboard.structures.ModuleTreeNode;
import org.eclipse.linuxtools.systemtap.ui.dashboard.views.ActiveModuleBrowserView;
import org.eclipse.linuxtools.systemtap.ui.dashboard.views.DashboardModuleBrowserView;

/**
 * This class is used for determining what module is currently selected. It examins both
 * the DashboardModuleBrowserView and the ActiveModuleBrowserView to determine which is
 * active, and what is selected inside that view.
 * @author Ryan Morse
 */
public final class GetSelectedModule {
    /**
     * This class examins the provided view and if it is an instance of either
     * DashboardModuleBrowserView or ActiveModuleBrowserView it retreives the selected
     * item and returns it.  Else, it returns null.
     * @param view The view that is currently open.
     * @return The selected DashboardModule contained in the provided view
     */
    public static DashboardModule getModule(IViewPart view) {
        if (null == view)
            view = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage()
                    .findView(DashboardModuleBrowserView.ID);

        if (view instanceof DashboardModuleBrowserView)
            return getModule2((DashboardModuleBrowserView) view);
        else if (view instanceof ActiveModuleBrowserView)
            return getModule2((ActiveModuleBrowserView) view);
        return null;
    }

    /**
     * This class examins the provied view and retreives the selected item from
     * it.  It then converts the selected item into a DashboardModule and returns it.
     * @param view The DashboardModuleBrowserView that is currently open
     * @return The selected DashboardModule from the view
     */
    private static DashboardModule getModule2(DashboardModuleBrowserView view) {
        TreeViewer viewer = view.getViewer();
        ISelection selected = viewer.getSelection();
        if (null != selected && selected instanceof IStructuredSelection) {
            Object element = ((IStructuredSelection) selected).getFirstElement();
            if (element instanceof ModuleTreeNode) {
                ModuleTreeNode mod = (ModuleTreeNode) element;

                return (DashboardModule) mod.getData();
            }
        }
        return null;
    }

    public static TreeNode getNode(IViewPart view) {
        TreeViewer viewer = null;
        if (null == view)
            view = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage()
                    .findView(DashboardModuleBrowserView.ID);
        if (view instanceof DashboardModuleBrowserView)
            viewer = ((DashboardModuleBrowserView) view).getViewer();
        else
            viewer = ((ActiveModuleBrowserView) view).getViewer();
        ISelection selected = viewer.getSelection();
        if (null != selected && selected instanceof IStructuredSelection) {
            Object element = ((IStructuredSelection) selected).getFirstElement();
            if (element instanceof TreeNode) {
                TreeNode node = (TreeNode) element;

                return node;
            }
        }
        return null;
    }

    /**
     * This class examins the provied view and retreives the selected item from
     * it.  It then gets the DashboardModule contained within the selected item
     * and returns it.
     * @param view The ActiveModuleBrowserView that is currently open
     * @return The selected DashboardModule from the view
     */

    private static DashboardModule getModule2(ActiveModuleBrowserView view) {
        TreeViewer viewer = view.getViewer();
        ISelection selected = viewer.getSelection();
        if (null != selected && selected instanceof IStructuredSelection) {
            Object element = ((IStructuredSelection) selected).getFirstElement();
            if (element instanceof TreeNode) {
                TreeNode mod = (TreeNode) element;

                return ((ActiveModuleData) mod.getData()).module;
            }
        }
        return null;
    }
}