/*******************************************************************************
 * Copyright (c) 2009, 2012 SpringSource, a divison of VMware, Inc.
 * Copyright (c) 2000, 2008 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 org.eclipse.virgo.ide.runtime.internal.ui.actions;

import java.util.Iterator;

import org.eclipse.core.resources.IFile;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.ui.IEditorDescriptor;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.actions.SelectionListenerAction;
import org.eclipse.ui.internal.ide.DialogUtil;
import org.eclipse.ui.internal.ide.IDEWorkbenchMessages;
import org.eclipse.ui.internal.ide.IIDEHelpContextIds;
import org.eclipse.ui.part.FileEditorInput;
import org.eclipse.virgo.ide.runtime.internal.ui.projects.ProjectFileReference;

/**
 * Standard action for opening an editor on the currently selected file resource(s).
 * <p>
 * Note that there is a different action for opening closed projects: <code>OpenResourceAction</code>.
 * </p>
 * <p>
 * This class may be instantiated; it is not intended to be subclassed.
 * </p>
 * 
 * @author Others
 * @author Miles Parker
 * @noextend This class is not intended to be subclassed by clients.
 */
public class OpenServerProjectFileAction extends SelectionListenerAction {

	/**
	 * The id of this action.
	 */
	public static final String ID = PlatformUI.PLUGIN_ID + ".OpenFileAction";//$NON-NLS-1$

	/**
	 * The editor to open.
	 */
	private final IEditorDescriptor editorDescriptor;

	private final IWorkbenchPage workbenchPage2;

	/**
	 * Creates a new action that will open editors on the then-selected file resources. Equivalent to
	 * <code>OpenFileAction(page,null)</code>.
	 * 
	 * @param page
	 *            the workbench page in which to open the editor
	 */
	public OpenServerProjectFileAction(IWorkbenchPage page) {
		this(page, null);
	}

	/**
	 * Creates a new action that will open instances of the specified editor on the then-selected file resources.
	 * 
	 * @param page
	 *            the workbench page in which to open the editor
	 * @param descriptor
	 *            the editor descriptor, or <code>null</code> if unspecified
	 */
	public OpenServerProjectFileAction(IWorkbenchPage page, IEditorDescriptor descriptor) {
		super("Open Linked File");
		this.workbenchPage2 = page;
		setText(descriptor == null ? IDEWorkbenchMessages.OpenFileAction_text : descriptor.getLabel());
		PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IIDEHelpContextIds.OPEN_FILE_ACTION);
		setToolTipText(IDEWorkbenchMessages.OpenFileAction_toolTip);
		setId(ID);
		this.editorDescriptor = descriptor;
	}

	/**
	 * @see org.eclipse.ui.actions.OpenSystemEditorAction#updateSelection(org.eclipse.jface.viewers.IStructuredSelection)
	 */
	@Override
	public boolean updateSelection(IStructuredSelection selection) {
		return selection instanceof StructuredSelection
				&& ((StructuredSelection) selection).getFirstElement() instanceof ProjectFileReference;
	}

	/**
	 * @see org.eclipse.ui.actions.OpenSystemEditorAction#run()
	 */
	@Override
	public void run() {
		Iterator iterator = getStructuredSelection().iterator();
		while (iterator.hasNext()) {
			Object next = iterator.next();
			if (next instanceof ProjectFileReference) {
				openFile(((ProjectFileReference) next).getWorkspaceFile());
			}
		}
	}

	public void openFile(IFile file) {
		try {
			IEditorDescriptor defaultEditor = workbenchPage2.getWorkbenchWindow()
					.getWorkbench()
					.getEditorRegistry()
					.getDefaultEditor(file.getName());
			workbenchPage2.openEditor(new FileEditorInput(file), defaultEditor.getId());
		} catch (PartInitException e) {
			DialogUtil.openError(workbenchPage2.getWorkbenchWindow().getShell(),
					IDEWorkbenchMessages.OpenSystemEditorAction_dialogTitle, e.getMessage(), e);
		}
	}
}