bundles/org.eclipse.e4.tools.emf.ui/src/org/eclipse/e4/tools/emf/ui/internal/common/component/virtual/VMenuEditor.java

/*******************************************************************************
 * Copyright (c) 2010 BestSolution.at 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:
 *     Tom Schindl <tom.schindl@bestsolution.at> - initial API and implementation
 *     Steven Spungin <steven@spungin.tv> - Ongoing maintenance
 ******************************************************************************/
package org.eclipse.e4.tools.emf.ui.internal.common.component.virtual;

import java.util.ArrayList;
import java.util.List;
import javax.annotation.PostConstruct;
import javax.inject.Inject;
import org.eclipse.core.databinding.observable.list.IObservableList;
import org.eclipse.core.databinding.observable.value.WritableValue;
import org.eclipse.e4.core.contexts.IEclipseContext;
import org.eclipse.e4.tools.emf.ui.common.component.AbstractComponentEditor;
import org.eclipse.e4.tools.emf.ui.internal.ResourceProvider;
import org.eclipse.e4.tools.emf.ui.internal.common.AbstractPickList;
import org.eclipse.e4.tools.emf.ui.internal.common.E4PickList;
import org.eclipse.e4.tools.emf.ui.internal.common.VirtualEntry;
import org.eclipse.e4.ui.model.application.descriptor.basic.MPartDescriptor;
import org.eclipse.e4.ui.model.application.ui.basic.MPart;
import org.eclipse.e4.ui.model.application.ui.menu.MMenu;
import org.eclipse.e4.ui.model.application.ui.menu.impl.MenuFactoryImpl;
import org.eclipse.e4.ui.model.application.ui.menu.impl.MenuPackageImpl;
import org.eclipse.emf.common.command.Command;
import org.eclipse.emf.databinding.EMFDataBindingContext;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.emf.ecore.util.EcoreUtil;
import org.eclipse.emf.edit.command.AddCommand;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.ComboViewer;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.StructuredViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.CTabFolder;
import org.eclipse.swt.custom.CTabItem;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;

public class VMenuEditor extends AbstractComponentEditor {
	private Composite composite;
	private EMFDataBindingContext context;
	private StructuredViewer viewer;
	private List<Action> actions = new ArrayList<Action>();
	private EStructuralFeature feature;

	@Inject
	IEclipseContext eclipseContext;

	public static final String VIEW_MENU_TAG = "ViewMenu"; //$NON-NLS-1$

	enum Types {
		MENU, POPUP_MENU, VIEW_MENU
	}

	protected VMenuEditor(EStructuralFeature feature) {
		super();
		this.feature = feature;
	}

	@PostConstruct
	void init() {
		actions.add(new Action(Messages.VMenuEditor_AddMenuContribution, createImageDescriptor(ResourceProvider.IMG_Menu)) {
			@Override
			public void run() {
				handleAdd(MenuPackageImpl.Literals.MENU);
			}
		});
		actions.add(new Action(Messages.VMenuEditor_AddPopupMenuContribution, createImageDescriptor(ResourceProvider.IMG_Menu)) {
			@Override
			public void run() {
				handleAdd(MenuPackageImpl.Literals.POPUP_MENU);
			}
		});
		actions.add(new Action(Messages.MenuEditor_Label_ViewMenu, createImageDescriptor(ResourceProvider.IMG_Menu)) {
			@Override
			public void run() {
				handleAddViewMenu();
			}
		});
	}

	@Override
	public Image getImage(Object element, Display display) {
		return null;
	}

	@Override
	public String getLabel(Object element) {
		return Messages.VMenuEditor_TreeLabel;
	}

	@Override
	public String getDetailLabel(Object element) {
		return null;
	}

	@Override
	public String getDescription(Object element) {
		return Messages.VMenuEditor_TreeLabelDescription;
	}

	@Override
	public Composite doGetEditor(Composite parent, Object object) {
		if (composite == null) {
			context = new EMFDataBindingContext();
			composite = createForm(parent, context, getMaster());
		}
		VirtualEntry<?> o = (VirtualEntry<?>) object;
		viewer.setInput(o.getList());
		getMaster().setValue(o.getOriginalParent());
		return composite;
	}

	private Composite createForm(Composite parent, EMFDataBindingContext context, WritableValue master) {
		CTabFolder folder = new CTabFolder(parent, SWT.BOTTOM);

		CTabItem item = new CTabItem(folder, SWT.NONE);
		item.setText(Messages.ModelTooling_Common_TabDefault);

		parent = createScrollableContainer(folder);
		item.setControl(parent.getParent());

		AbstractPickList pickList = new E4PickList(parent, SWT.NONE, null, Messages, this, feature) {
			@Override
			protected void addPressed() {
				Types t = (Types) ((IStructuredSelection) getPicker().getSelection()).getFirstElement();
				if (t == Types.MENU) {
					handleAdd(MenuPackageImpl.Literals.MENU);
				} else if (t == Types.POPUP_MENU) {
					handleAdd(MenuPackageImpl.Literals.POPUP_MENU);
				} else {
					handleAddViewMenu();
				}
			}

			@Override
			protected List<?> getContainerChildren(Object container) {
				if (container instanceof MPartDescriptor) {
					return ((MPartDescriptor) container).getMenus();
				} else if (container instanceof MPart) {
					return ((MPart) container).getMenus();
				} else {
					return null;
				}
			}
		};
		pickList.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 3, 1));
		viewer = pickList.getList();

		ComboViewer picker = pickList.getPicker();
		picker.setContentProvider(new ArrayContentProvider());
		picker.setLabelProvider(new LabelProvider() {
			@Override
			public String getText(Object element) {
				if (element == Types.MENU) {
					return Messages.MenuEditor_Label;
				} else if (element == Types.POPUP_MENU) {
					return Messages.PopupMenuEditor_TreeLabel;
				}
				return Messages.MenuEditor_Label_ViewMenu;
			}
		});
		picker.setInput(Types.values());
		picker.setSelection(new StructuredSelection(Types.MENU));

		folder.setSelection(0);

		return folder;
	}

	@Override
	public IObservableList getChildList(Object element) {
		return null;
	}

	protected void handleAdd(EClass eClass) {
		EObject handler = EcoreUtil.create(eClass);
		setElementId(handler);

		Command cmd = AddCommand.create(getEditingDomain(), getMaster().getValue(), feature, handler);

		if (cmd.canExecute()) {
			getEditingDomain().getCommandStack().execute(cmd);
			getEditor().setSelection(handler);
		}
	}

	protected void handleAddViewMenu() {
		MMenu menu = MenuFactoryImpl.eINSTANCE.createMenu();
		menu.getTags().add(VIEW_MENU_TAG);
		setElementId(menu);

		Command cmd = AddCommand.create(getEditingDomain(), getMaster().getValue(), feature, menu);

		if (cmd.canExecute()) {
			getEditingDomain().getCommandStack().execute(cmd);
			getEditor().setSelection(menu);
		}
	}

	@Override
	public List<Action> getActions(Object element) {
		ArrayList<Action> l = new ArrayList<Action>(super.getActions(element));
		l.addAll(actions);
		return l;
	}
}