/*******************************************************************************
 * Copyright (c) 2007 University of Illinois at Urbana-Champaign 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:
 *     UIUC - Initial API and implementation
 *******************************************************************************/
package org.eclipse.photran.internal.ui.actions;

import java.lang.reflect.InvocationTargetException;

import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.jobs.ISchedulingRule;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.photran.internal.ui.editor.FortranEditor;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.IEditorActionDelegate;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.IWorkbenchWindowActionDelegate;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.internal.Workbench;
import org.eclipse.ui.progress.IProgressService;

/**
 * Base class (with utility methods) for actions that are initiated from the Fortran editor.
 *
 * @author Jeff Overbey
 */
@SuppressWarnings("restriction")
public abstract class FortranEditorActionDelegate
    extends Action
    implements IEditorActionDelegate, IWorkbenchWindowActionDelegate, IRunnableWithProgress
{
    ///////////////////////////////////////////////////////////////////////////
    // Fields
    ///////////////////////////////////////////////////////////////////////////

    protected IWorkbenchWindow window = null;
    protected FortranEditor fEditor = null;

    ///////////////////////////////////////////////////////////////////////////
    // Constructors
    ///////////////////////////////////////////////////////////////////////////

    public FortranEditorActionDelegate() {}

    public FortranEditorActionDelegate(FortranEditor ed) { fEditor = ed; }

    ///////////////////////////////////////////////////////////////////////////
    // IActionDelegate Implementation
    ///////////////////////////////////////////////////////////////////////////

    public void run(IAction action)
    {
        if (this.window == null)
            this.window = Workbench.getInstance().getActiveWorkbenchWindow();

        if (this.window != null)
        {
            IEditorPart editor = this.window.getActivePage().getActiveEditor();
            fEditor = editor instanceof FortranEditor ? (FortranEditor)editor : null;
        }

        if (this.fEditor != null)
        {
            IProgressService context = PlatformUI.getWorkbench().getProgressService();
            ISchedulingRule lockEntireWorkspace = ResourcesPlugin.getWorkspace().getRoot();
            try
            {
                context.runInUI(context, this, lockEntireWorkspace);
            }
            catch (InvocationTargetException e)
            {
                e.printStackTrace();
                MessageDialog.openError(fEditor.getShell(), UIMessages.FortranEditorActionDelegate_UnhandledExceptionTitle, e.getMessage());
            }
            catch (InterruptedException e)
            {
                // Do nothing
            }
        }
    }

    public void selectionChanged(IAction action, ISelection selection) {;}

    ///////////////////////////////////////////////////////////////////////////
    // IWorkbenchWindowActionDelegate Implementation
    ///////////////////////////////////////////////////////////////////////////

    public void init(IWorkbenchWindow window)
    {
        this.window = window;
    }

    public void dispose() {;}

    ///////////////////////////////////////////////////////////////////////////
    // IEditorActionDelegate Implementation
    ///////////////////////////////////////////////////////////////////////////

    public void setActiveEditor(IAction action, IEditorPart targetEditor)
    {
        fEditor = targetEditor instanceof FortranEditor ? (FortranEditor)targetEditor : null;
    }

    ///////////////////////////////////////////////////////////////////////////
    // Utility Methods for Subclasses
    ///////////////////////////////////////////////////////////////////////////

    protected FortranEditor getFortranEditor()
    {
        return fEditor;
    }

    protected Shell getShell()
    {
        return fEditor == null ? null : fEditor.getShell();
    }
}