/*******************************************************************************
 * Copyright (c) 2000, 2018 IBM Corporation and others.
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 * 
 * SPDX-License-Identifier: EPL-2.0
 *
 *******************************************************************************/
package org.eclipse.dltk.internal.ui.scriptview;

import org.eclipse.dltk.core.DLTKCore;
import org.eclipse.dltk.internal.ui.actions.MultiActionGroup;
import org.eclipse.dltk.ui.DLTKPluginImages;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.action.IMenuManager;
import org.eclipse.jface.action.MenuManager;
import org.eclipse.jface.action.Separator;
import org.eclipse.ui.IActionBars;
import org.eclipse.ui.IWorkbenchActionConstants;

/**
 * Adds view menus to switch between flat and hierarchical layout.
 */
public class LayoutActionGroup extends MultiActionGroup {

	LayoutActionGroup(ScriptExplorerPart packageExplorer) {
		super(createActions(packageExplorer),
				getSelectedState(packageExplorer));
	}

	@Override
	public void fillActionBars(IActionBars actionBars) {
		super.fillActionBars(actionBars);
		contributeToViewMenu(actionBars.getMenuManager());
	}

	private void contributeToViewMenu(IMenuManager viewMenu) {
		viewMenu.add(new Separator());

		// Create layout sub menu

		IMenuManager layoutSubMenu = new MenuManager(
				ScriptMessages.LayoutActionGroup_label);
		final String layoutGroupName = "layout"; //$NON-NLS-1$
		Separator marker = new Separator(layoutGroupName);

		viewMenu.add(new Separator(IWorkbenchActionConstants.MB_ADDITIONS));
		viewMenu.add(marker);
		viewMenu.appendToGroup(layoutGroupName, layoutSubMenu);
		viewMenu.add(
				new Separator(IWorkbenchActionConstants.MB_ADDITIONS + "-end"));//$NON-NLS-1$
		addActions(layoutSubMenu);
	}

	static int getSelectedState(ScriptExplorerPart packageExplorer) {
		if (packageExplorer.isFlatLayout()) {
			return 0;
		}
		return 1;
	}

	static IAction[] createActions(ScriptExplorerPart packageExplorer) {
		IAction flatLayoutAction = new LayoutAction(packageExplorer, true);
		flatLayoutAction.setText(
				ScriptMessages.LayoutActionGroup_flatLayoutAction_label);
		DLTKPluginImages.setLocalImageDescriptors(flatLayoutAction,
				"flatLayout.png"); //$NON-NLS-1$
		IAction hierarchicalLayout = new LayoutAction(packageExplorer, false);
		hierarchicalLayout.setText(
				ScriptMessages.LayoutActionGroup_hierarchicalLayoutAction_label);
		DLTKPluginImages.setLocalImageDescriptors(hierarchicalLayout,
				"hierarchicalLayout.png"); //$NON-NLS-1$

		return new IAction[] { flatLayoutAction, hierarchicalLayout };
	}
}

class LayoutAction extends Action implements IAction {

	private boolean fIsFlatLayout;
	private ScriptExplorerPart fPackageExplorer;

	public LayoutAction(ScriptExplorerPart packageExplorer, boolean flat) {
		super("", AS_RADIO_BUTTON); //$NON-NLS-1$

		fIsFlatLayout = flat;
		fPackageExplorer = packageExplorer;
		if (DLTKCore.DEBUG) {
			System.err.println("Add help support here..."); //$NON-NLS-1$
		}
		// if (fIsFlatLayout)
		// PlatformUI.getWorkbench().getHelpSystem().setHelp(this,
		// IScriptHelpContextIds.LAYOUT_FLAT_ACTION);
		// else
		// PlatformUI.getWorkbench().getHelpSystem().setHelp(this,
		// IScriptHelpContextIds.LAYOUT_HIERARCHICAL_ACTION);
	}

	@Override
	public void run() {
		if (fPackageExplorer.isFlatLayout() != fIsFlatLayout)
			fPackageExplorer.setFlatLayout(fIsFlatLayout);
	}
}