bundles/org.eclipse.e4.tools.emf.ui/src/org/eclipse/e4/tools/emf/ui/internal/common/component/virtual/VModelFragmentsEditor.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
 ******************************************************************************/
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.tools.emf.ui.common.component.AbstractComponentEditor;
import org.eclipse.e4.tools.emf.ui.internal.ResourceProvider;
import org.eclipse.e4.tools.emf.ui.internal.common.ComponentLabelProvider;
import org.eclipse.e4.tools.emf.ui.internal.common.VirtualEntry;
import org.eclipse.e4.ui.model.fragment.MFragmentFactory;
import org.eclipse.e4.ui.model.fragment.MModelFragments;
import org.eclipse.e4.ui.model.fragment.MStringModelFragment;
import org.eclipse.e4.ui.model.fragment.impl.FragmentPackageImpl;
import org.eclipse.emf.common.command.Command;
import org.eclipse.emf.databinding.EMFDataBindingContext;
import org.eclipse.emf.edit.command.AddCommand;
import org.eclipse.emf.edit.command.MoveCommand;
import org.eclipse.emf.edit.command.RemoveCommand;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.databinding.viewers.ObservableListContentProvider;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.CTabFolder;
import org.eclipse.swt.custom.CTabItem;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;

public class VModelFragmentsEditor extends AbstractComponentEditor {
	private Composite composite;
	private EMFDataBindingContext context;
	private TableViewer viewer;
	private List<Action> actions = new ArrayList<Action>();

	@Inject
	public VModelFragmentsEditor() {
		super();
	}

	@PostConstruct
	void init() {
		actions.add(new Action(Messages.VModelFragmentsEditor_AddFragment, createImageDescriptor(ResourceProvider.IMG_ModelFragments)) {
			@Override
			public void run() {
				handleAdd();
			}
		});
	}

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

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

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

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

		{
			viewer = new TableViewer(parent);
			ObservableListContentProvider cp = new ObservableListContentProvider();
			viewer.setContentProvider(cp);
			viewer.setLabelProvider(new ComponentLabelProvider(getEditor(), Messages));

			GridData gd = new GridData(GridData.FILL_BOTH);
			viewer.getControl().setLayoutData(gd);

			Composite buttonComp = new Composite(parent, SWT.NONE);
			buttonComp.setLayoutData(new GridData(GridData.FILL, GridData.END, false, false));
			GridLayout gl = new GridLayout(2, false);
			gl.marginLeft = 0;
			gl.marginRight = 0;
			gl.marginWidth = 0;
			gl.marginHeight = 0;
			buttonComp.setLayout(gl);

			Button b = new Button(buttonComp, SWT.PUSH | SWT.FLAT);
			b.setText(Messages.ModelTooling_Common_Up);
			b.setImage(createImage(ResourceProvider.IMG_Obj16_arrow_up));
			b.setLayoutData(new GridData(GridData.FILL, GridData.CENTER, true, false, 2, 1));
			b.addSelectionListener(new SelectionAdapter() {
				@Override
				public void widgetSelected(SelectionEvent e) {
					if (!viewer.getSelection().isEmpty()) {
						IStructuredSelection s = (IStructuredSelection) viewer.getSelection();
						if (s.size() == 1) {
							Object obj = s.getFirstElement();
							MModelFragments container = (MModelFragments) getMaster().getValue();
							int idx = container.getFragments().indexOf(obj) - 1;
							if (idx >= 0) {
								Command cmd = MoveCommand.create(getEditingDomain(), getMaster().getValue(), FragmentPackageImpl.Literals.MODEL_FRAGMENTS__FRAGMENTS, obj, idx);

								if (cmd.canExecute()) {
									getEditingDomain().getCommandStack().execute(cmd);
									viewer.setSelection(new StructuredSelection(obj));
								}
							}

						}
					}
				}
			});

			b = new Button(buttonComp, SWT.PUSH | SWT.FLAT);
			b.setText(Messages.ModelTooling_Common_Down);
			b.setImage(createImage(ResourceProvider.IMG_Obj16_arrow_down));
			b.setLayoutData(new GridData(GridData.FILL, GridData.CENTER, true, false, 2, 1));
			b.addSelectionListener(new SelectionAdapter() {
				@Override
				public void widgetSelected(SelectionEvent e) {
					if (!viewer.getSelection().isEmpty()) {
						IStructuredSelection s = (IStructuredSelection) viewer.getSelection();
						if (s.size() == 1) {
							Object obj = s.getFirstElement();
							MModelFragments container = (MModelFragments) getMaster().getValue();
							int idx = container.getFragments().indexOf(obj) + 1;
							if (idx < container.getFragments().size()) {
								Command cmd = MoveCommand.create(getEditingDomain(), getMaster().getValue(), FragmentPackageImpl.Literals.MODEL_FRAGMENTS__FRAGMENTS, obj, idx);

								if (cmd.canExecute()) {
									getEditingDomain().getCommandStack().execute(cmd);
									viewer.setSelection(new StructuredSelection(obj));
								}
							}

						}
					}
				}
			});

			b = new Button(buttonComp, SWT.PUSH | SWT.FLAT);
			b.setText(Messages.ModelTooling_Common_AddEllipsis);
			b.setImage(createImage(ResourceProvider.IMG_Obj16_table_add));
			b.setLayoutData(new GridData(GridData.FILL, GridData.CENTER, true, false));
			b.addSelectionListener(new SelectionAdapter() {
				@Override
				public void widgetSelected(SelectionEvent e) {

					handleAdd();

				}

			});

			b = new Button(buttonComp, SWT.PUSH | SWT.FLAT);
			b.setText(Messages.ModelTooling_Common_Remove);
			b.setImage(createImage(ResourceProvider.IMG_Obj16_table_delete));
			b.setLayoutData(new GridData(GridData.FILL, GridData.CENTER, true, false, 2, 1));
			b.addSelectionListener(new SelectionAdapter() {
				@Override
				public void widgetSelected(SelectionEvent e) {
					if (!viewer.getSelection().isEmpty()) {
						List<?> elements = ((IStructuredSelection) viewer.getSelection()).toList();

						Command cmd = RemoveCommand.create(getEditingDomain(), getMaster().getValue(), FragmentPackageImpl.Literals.MODEL_FRAGMENTS__FRAGMENTS, elements);
						if (cmd.canExecute()) {
							getEditingDomain().getCommandStack().execute(cmd);
						}
					}
				}
			});
		}

		folder.setSelection(0);

		return folder;
	}

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

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

	private void handleAdd() {
		MStringModelFragment eObject = MFragmentFactory.INSTANCE.createStringModelFragment();
		Command cmd = AddCommand.create(getEditingDomain(), getMaster().getValue(), FragmentPackageImpl.Literals.MODEL_FRAGMENTS__FRAGMENTS, eObject);

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

}