bundles/org.eclipse.e4.tools.emf.ui/src/org/eclipse/e4/tools/emf/ui/common/component/AbstractComponentEditor.java - platform/eclipse.platform.ui.tools - Git at Google

 /*******************************************************************************
  * Copyright (c) 2010-2014 BestSolution.at and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at
  * https://www.eclipse.org/legal/epl-2.0/
  *
  * SPDX-License-Identifier: EPL-2.0
  *
  * Contributors:
  * Tom Schindl <tom.schindl@bestsolution.at> - initial API and implementation
  * Marco Descher <marco@descher.at> - Bug 422465
  * Steven Spungin <steven@spungin.tv> - Bug 437951, Bug 439709
  * Olivier Prouvost <olivier.prouvost@opcoach.com> Bug 403583, 472658
  ******************************************************************************/
 package org.eclipse.e4.tools.emf.ui.common.component;

 import java.io.IOException;
 import java.io.InputStream;
 import java.net.URL;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 import java.util.Objects;

 import javax.annotation.PreDestroy;
 import javax.inject.Inject;

 import org.eclipse.core.databinding.observable.list.IObservableList;
 import org.eclipse.core.databinding.observable.value.WritableValue;
 import org.eclipse.core.databinding.property.value.IValueProperty;
 import org.eclipse.core.resources.IProject;
 import org.eclipse.core.runtime.FileLocator;
 import org.eclipse.e4.core.di.annotations.Optional;
 import org.eclipse.e4.core.services.nls.Translation;
 import org.eclipse.e4.core.services.translation.TranslationService;
 import org.eclipse.e4.tools.emf.ui.common.AbstractElementEditorContribution;
 import org.eclipse.e4.tools.emf.ui.common.Util;
 import org.eclipse.e4.tools.emf.ui.internal.Messages;
 import org.eclipse.e4.tools.emf.ui.internal.common.ModelEditor;
 import org.eclipse.e4.tools.emf.ui.internal.common.component.ControlFactory;
 import org.eclipse.e4.tools.emf.ui.internal.common.properties.ProjectOSGiTranslationProvider;
 import org.eclipse.e4.tools.services.IClipboardService.Handler;
 import org.eclipse.e4.tools.services.IResourcePool;
 import org.eclipse.e4.tools.services.impl.ResourceBundleTranslationProvider;
 import org.eclipse.e4.ui.model.application.MApplicationElement;
 import org.eclipse.e4.ui.model.application.ui.MUIElement;
 import org.eclipse.e4.ui.model.application.ui.MUILabel;
 import org.eclipse.emf.databinding.EMFDataBindingContext;
 import org.eclipse.emf.databinding.FeaturePath;
 import org.eclipse.emf.databinding.edit.EMFEditProperties;
 import org.eclipse.emf.ecore.EAttribute;
 import org.eclipse.emf.ecore.EObject;
 import org.eclipse.emf.edit.domain.EditingDomain;
 import org.eclipse.jface.action.Action;
 import org.eclipse.jface.resource.ImageDescriptor;
 import org.eclipse.jface.resource.ImageRegistry;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.custom.CTabFolder;
 import org.eclipse.swt.custom.CTabItem;
 import org.eclipse.swt.custom.ScrolledComposite;
 import org.eclipse.swt.events.ControlAdapter;
 import org.eclipse.swt.events.ControlEvent;
 import org.eclipse.swt.graphics.Image;
 import org.eclipse.swt.graphics.Rectangle;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Control;

 /**
  * @param <M> type of the master object
  */
 public abstract class AbstractComponentEditor<M> {
 	private static final String GREY_SUFFIX = "Grey"; //$NON-NLS-1$

 	private static final String CSS_CLASS_KEY = "org.eclipse.e4.ui.css.CssClassName"; //$NON-NLS-1$

 	private static final int MAX_IMG_SIZE = 16;

 	private final WritableValue<M> master = new WritableValue<>();

 	public static final int SEARCH_IMAGE = 0;
 	public static final int TABLE_ADD_IMAGE = 1;
 	public static final int TABLE_DELETE_IMAGE = 2;
 	public static final int ARROW_UP = 3;
 	public static final int ARROW_DOWN = 4;

 	protected static final int VERTICAL_LIST_WIDGET_INDENT = 10;

 	private final List<Image> createdImages = new ArrayList<>();

 	@Inject
 	private EditingDomain editingDomain;
 	@Inject
 	private ModelEditor editor;
 	@Inject
 	public IResourcePool resourcePool;

 	@Inject
 	@Optional
 	protected IProject project;

 	@Inject
 	@Translation
 	protected Messages Messages;

 	@Inject
 	@Optional
 	private ProjectOSGiTranslationProvider translationProvider;


 	private Composite editorControl;

 	private IdGenerator generator;

 	public EditingDomain getEditingDomain() {
 		return editingDomain;
 	}

 	public ModelEditor getEditor() {
 		return editor;
 	}

 	public WritableValue<M> getMaster() {
 		return master;
 	}

 	protected void setElementId(Object element) {
 		if (getEditor().isAutoCreateElementId() && element instanceof MApplicationElement) {
 			final MApplicationElement el = (MApplicationElement) element;
 			if (el.getElementId() == null || el.getElementId().trim().length() == 0) {
 				el.setElementId(Util.getDefaultElementId(((EObject) getMaster().getValue()).eResource(), el,
 						getEditor().getProject()));
 			}
 		}
 	}

 	public Image createImage(String key) {
 		return resourcePool.getImageUnchecked(key);
 	}

 	public ImageDescriptor createImageDescriptor(String key) {
 		if (key == null) {
 			return null;
 		}
 		return ImageDescriptor.createFromImage(createImage(key));
 	}

 	private ImageRegistry getComponentImages() {
 		return editor.getComponentImages();
 	}

 	/**
 	 * Get the image described in element if this is a MUILabel
 	 *
 	 * @param element the element in tree to be displayed
 	 * @return image of element if iconUri is not empty (returns bad image if bad
 	 *         URI), else returns null
 	 */
 	public Image getImageFromIconURI(MUILabel element) {

 		Image img = null;
 		// Returns only an image if there is a non empty Icon URI
 		final String iconUri = element.getIconURI();
 		if (iconUri != null && iconUri.trim().length() > 0) {
 			final boolean greyVersion = shouldBeGrey(element);
 			// Is this image already loaded ?
 			img = getImage(iconUri, greyVersion);
 			if (img == null) {
 				// No image registered yet in ImageRegistry...
 				final ImageDescriptor desc = getImageDescriptorFromUri(iconUri);

 				// Can now add this image in the image registry
 				getComponentImages().put(iconUri, desc);
 				img = getImage(iconUri, greyVersion);
 			}
 		}

 		return img;
 	}

 	/** @return true if the image of this element should be displayed in grey */
 	private boolean shouldBeGrey(Object element) {
 		// It is grey if a MUIElement is not visible or not rendered
 		// It is not grey if this is not a MUIElement or if it is rendered and
 		// visible.
 		return element instanceof MUIElement
 				&& !(((MUIElement) element).isToBeRendered() && ((MUIElement) element).isVisible());
 	}

 	/**
 	 *
 	 * @param key  the key of image (can be a constants from ResourceProvider or a
 	 *             platform:/ uri location
 	 * @param grey if true returns the grey version if original image exists
 	 * @return the image with a give key or grey version.
 	 */
 	private Image getImage(String key, boolean grey) {

 		// try to get image directly with right key and grey value
 		Image result = getComponentImages().get(key + (grey ? GREY_SUFFIX : "")); //$NON-NLS-1$

 		// may be image not yet created
 		if (result == null) {
 			result = getComponentImages().get(key);
 			// If no image found, ask the resource pool to create it...
 			if (result == null && !key.startsWith("platform:")) { //$NON-NLS-1$
 				try {
 					result = createImage(key);
 				} catch (final Exception e) {
 				}
 				if (result != null) {
 					getComponentImages().put(key, result);
 				}
 			}

 			// Create the grey version of image and put it in registry
 			if (result != null && grey) {
 				final Image greyImg = new Image(result.getDevice(), result, SWT.IMAGE_GRAY);
 				getComponentImages().put(key + GREY_SUFFIX, greyImg);
 				result = greyImg;
 			}
 		}
 		return result;
 	}

 	/**
 	 * Get image from an element Implements algorithm described in bug #465271
 	 *
 	 * @param element the Application Element
 	 * @param key     the element image key if no icon URI
 	 * @return Image or null if nothing found
 	 */
 	public Image getImage(Object element, String key) {
 		Image result = null;

 		if (element instanceof MUILabel) {
 			result = getImageFromIconURI((MUILabel) element);
 		}

 		if (result == null) {
 			// This is a model element with a key or a MUILabel without IconUri
 			final boolean greyVersion = shouldBeGrey(element);
 			result = getImage(key, greyVersion);
 		}

 		return result;

 	}

 	/**
 	 * Create a readable ImageDescriptor behind URI.
 	 *
 	 * @param uri
 	 * @return
 	 */
 	private ImageDescriptor getImageDescriptorFromUri(String uri) {
 		ImageDescriptor result = null;

 		URL url = findPlatformImage(uri);

 		if (url != null) {
 			ImageDescriptor imageDesc = ImageDescriptor.createFromURL(url);
 			Image scaled = Util.scaleImage(imageDesc.createImage(), MAX_IMG_SIZE);
 			createdImages.add(scaled);
 			result = ImageDescriptor.createFromImage(scaled);
 		}

 		return result;
 	}

 	@SuppressWarnings("resource")
 	private static URL findPlatformImage(String uri) {
 		// SEVERAL CASES are possible here :
 		// * uri = platform:/plugin/myplugin/icons/image.gif
 		// * uri = platform:/resource/myplugin/icons/image.gif
 		// * uri : platform:/plugin/myplugin/$nl$/icons/image.gif

 		// We must check if file exists before creating the ImageDescriptor
 		// because ImageRegistry will throw and print a DeviceResourceException
 		// With the E4 editors, the platform:/plugin/ is set for
 		// runtime, but the file can be in workspace during development In this
 		// case, we must rather use platform:/resource/.
 		// Used ideas from the ImageTooltip code around line 70 to fix this

 		InputStream stream = null;
 		URL url = null;

 		try {
 			final URL uri2url = new URL(uri);
 			url = FileLocator.toFileURL(uri2url);
 			stream = url.openStream();
 		} catch (final IOException e) {
 			// If no stream behind this URL, it is probably a platform:/plugin
 			// which must be found as a platform:/resource (this case occurs in
 			// the model editor when icon URI are set using the dialog)
 			url = null;
 			if (uri.startsWith("platform:/plugin")) //$NON-NLS-1$
 			{
 				try {
 					// Try to get it using 'platform:/resource'
 					final URL resUrl = new URL(uri.replace("platform:/plugin", "platform:/resource")); //$NON-NLS-1$//$NON-NLS-2$
 					url = FileLocator.toFileURL(resUrl);
 					stream = url.openStream();

 				} catch (final IOException e2) {
 					// No file behind, may be this is a $nl$ or a $ws$ path..
 					// must use find on FileLocator which does not deal with
 					// platform:/resource !
 					try {
 						url = FileLocator.find(new URL(uri));
 						stream = url != null ? url.openStream() : null;
 					} catch (final IOException ex) {
 						url = null;
 						// Can't do more !
 					}
 				}
 			}
 		}

 		if (stream != null) {
 			try {
 				stream.close();
 			} catch (final IOException ex) {
 			}
 		}
 		return url;
 	}

 	public Image getImage(Object element) {
 		return null;
 	}


 	public abstract String getLabel(Object element);

 	public abstract String getDetailLabel(Object element);

 	public abstract String getDescription(Object element);

 	public Composite getEditor(Composite parent, Object object) {
 		if (generator != null) {
 			generator.stopGenerating();
 			generator = null;
 		}
 		editorControl = doGetEditor(parent, object);
 		return editorControl;
 	}

 	protected abstract Composite doGetEditor(Composite parent, Object object);

 	public abstract IObservableList<?> getChildList(Object element);

 	public FeaturePath[] getLabelProperties() {
 		return new FeaturePath[] {};
 	}

 	public List<Action> getActions(Object element) {
 		return Collections.emptyList();
 	}

 	/**
 	 * Translates an input <code>String</code> using the current
 	 * {@link ResourceBundleTranslationProvider} and <code>locale</code> from the
 	 * {@link TranslationService}.
 	 *
 	 * @param string the string to translate, may not be null.
 	 * @return the translated string or the input string if it could not be
 	 *         translated.
 	 */
 	public String translate(String string) {
 		return ControlFactory.tr(translationProvider, string);
 	}

 	/**
 	 * @param element
 	 * @return the list of actions that are populated in the import menu. Can be
 	 *         empty but is never null.
 	 */
 	public List<Action> getActionsImport(Object element) {
 		return Collections.emptyList();
 	}

 	protected String getLocalizedLabel(MUILabel element) {
 		return ControlFactory.getLocalizedLabel(translationProvider, element);
 	}

 	private boolean isFocusChild(Control control) {
 		Control c = control;
 		while (c != null && c != editorControl) {
 			c = c.getParent();
 		}
 		return c != null;
 	}

 	public void handleCopy() {
 		if (editorControl != null) {
 			final Control focusControl = editorControl.getDisplay().getFocusControl();

 			if (isFocusChild(focusControl) && focusControl.getData(ControlFactory.COPY_HANDLER) != null) {
 				((Handler) focusControl.getData(ControlFactory.COPY_HANDLER)).copy();
 			}
 		}
 	}

 	public void handlePaste() {
 		if (editorControl != null) {
 			final Control focusControl = editorControl.getDisplay().getFocusControl();

 			if (isFocusChild(focusControl) && focusControl.getData(ControlFactory.COPY_HANDLER) != null) {
 				((Handler) focusControl.getData(ControlFactory.COPY_HANDLER)).paste();
 			}
 		}
 	}

 	public void handleCut() {
 		if (editorControl != null) {
 			final Control focusControl = editorControl.getDisplay().getFocusControl();

 			if (isFocusChild(focusControl) && focusControl.getData(ControlFactory.COPY_HANDLER) != null) {
 				((Handler) focusControl.getData(ControlFactory.COPY_HANDLER)).cut();
 			}
 		}
 	}

 	protected Composite createScrollableContainer(Composite parent) {
 		final ScrolledComposite scrolling = new ScrolledComposite(parent, SWT.H_SCROLL | SWT.V_SCROLL);
 		scrolling.setBackgroundMode(SWT.INHERIT_DEFAULT);
 		scrolling.setData(CSS_CLASS_KEY, "formContainer"); //$NON-NLS-1$

 		final Composite contentContainer = new Composite(scrolling, SWT.NONE);

 		contentContainer.setData(CSS_CLASS_KEY, "formContainer"); //$NON-NLS-1$
 		scrolling.setExpandHorizontal(true);
 		scrolling.setExpandVertical(true);
 		scrolling.setContent(contentContainer);

 		scrolling.addControlListener(new ControlAdapter() {
 			@Override
 			public void controlResized(ControlEvent e) {
 				final Rectangle r = scrolling.getClientArea();
 				scrolling.setMinSize(contentContainer.computeSize(r.width, SWT.DEFAULT));
 			}
 		});

 		scrolling.setLayoutData(new GridData(GridData.FILL_BOTH));

 		final GridLayout gl = new GridLayout(3, false);
 		gl.horizontalSpacing = 10;
 		contentContainer.setLayout(gl);

 		return contentContainer;
 	}

 	protected void createContributedEditorTabs(CTabFolder folder, EMFDataBindingContext context,
 			WritableValue<M> master, Class<? super M> clazz) {
 		final List<AbstractElementEditorContribution> contributionList = editor.getTabContributionsForClass(clazz);

 		for (final AbstractElementEditorContribution eec : contributionList) {
 			final CTabItem item = new CTabItem(folder, SWT.BORDER);
 			item.setText(eec.getTabLabel());

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

 			eec.createContributedEditorTab(parent, context, master, getEditingDomain(), project);
 		}

 	}

 	/**
 	 * Generates an ID when the another field changes. Must be called after master
 	 * is set with the objects value.
 	 *
 	 * @param attSource The source attribute
 	 * @param attId     The id attribute to generate
 	 * @param control   optional control to disable generator after losing focus or
 	 *                  disposing
 	 */
 	protected void enableIdGenerator(EAttribute attSource, EAttribute attId, Control control) {
 		if (generator != null) {
 			generator.stopGenerating();
 			generator = null;
 		}
 		if (getEditor().isAutoCreateElementId()) {
 			generator = new IdGenerator();
 			@SuppressWarnings("unchecked")
 			IValueProperty<M, String> addSourceProp = EMFEditProperties.value(getEditingDomain(), attSource);
 			@SuppressWarnings("unchecked")
 			IValueProperty<M, String> attIdProp = EMFEditProperties.value(getEditingDomain(), attId);
 			generator.bind(getMaster(), addSourceProp, attIdProp, control);
 		}
 	}

 	@PreDestroy
 	public void dispose() {
 		createdImages.stream().filter(Objects::nonNull).filter(i -> !i.isDisposed()).forEach(Image::dispose);
 	}

 }
	/*******************************************************************************
	* Copyright (c) 2010-2014 BestSolution.at and others.
	*
	* This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License 2.0
	* which accompanies this distribution, and is available at
	* https://www.eclipse.org/legal/epl-2.0/
	*
	* SPDX-License-Identifier: EPL-2.0
	*
	* Contributors:
	* Tom Schindl <tom.schindl@bestsolution.at> - initial API and implementation
	* Marco Descher <marco@descher.at> - Bug 422465
	* Steven Spungin <steven@spungin.tv> - Bug 437951, Bug 439709
	* Olivier Prouvost <olivier.prouvost@opcoach.com> Bug 403583, 472658
	******************************************************************************/
	package org.eclipse.e4.tools.emf.ui.common.component;

	import java.io.IOException;
	import java.io.InputStream;
	import java.net.URL;
	import java.util.ArrayList;
	import java.util.Collections;
	import java.util.List;
	import java.util.Objects;

	import javax.annotation.PreDestroy;
	import javax.inject.Inject;

	import org.eclipse.core.databinding.observable.list.IObservableList;
	import org.eclipse.core.databinding.observable.value.WritableValue;
	import org.eclipse.core.databinding.property.value.IValueProperty;
	import org.eclipse.core.resources.IProject;
	import org.eclipse.core.runtime.FileLocator;
	import org.eclipse.e4.core.di.annotations.Optional;
	import org.eclipse.e4.core.services.nls.Translation;
	import org.eclipse.e4.core.services.translation.TranslationService;
	import org.eclipse.e4.tools.emf.ui.common.AbstractElementEditorContribution;
	import org.eclipse.e4.tools.emf.ui.common.Util;
	import org.eclipse.e4.tools.emf.ui.internal.Messages;
	import org.eclipse.e4.tools.emf.ui.internal.common.ModelEditor;
	import org.eclipse.e4.tools.emf.ui.internal.common.component.ControlFactory;
	import org.eclipse.e4.tools.emf.ui.internal.common.properties.ProjectOSGiTranslationProvider;
	import org.eclipse.e4.tools.services.IClipboardService.Handler;
	import org.eclipse.e4.tools.services.IResourcePool;
	import org.eclipse.e4.tools.services.impl.ResourceBundleTranslationProvider;
	import org.eclipse.e4.ui.model.application.MApplicationElement;
	import org.eclipse.e4.ui.model.application.ui.MUIElement;
	import org.eclipse.e4.ui.model.application.ui.MUILabel;
	import org.eclipse.emf.databinding.EMFDataBindingContext;
	import org.eclipse.emf.databinding.FeaturePath;
	import org.eclipse.emf.databinding.edit.EMFEditProperties;
	import org.eclipse.emf.ecore.EAttribute;
	import org.eclipse.emf.ecore.EObject;
	import org.eclipse.emf.edit.domain.EditingDomain;
	import org.eclipse.jface.action.Action;
	import org.eclipse.jface.resource.ImageDescriptor;
	import org.eclipse.jface.resource.ImageRegistry;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.custom.CTabFolder;
	import org.eclipse.swt.custom.CTabItem;
	import org.eclipse.swt.custom.ScrolledComposite;
	import org.eclipse.swt.events.ControlAdapter;
	import org.eclipse.swt.events.ControlEvent;
	import org.eclipse.swt.graphics.Image;
	import org.eclipse.swt.graphics.Rectangle;
	import org.eclipse.swt.layout.GridData;
	import org.eclipse.swt.layout.GridLayout;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Control;

	/**
	* @param <M> type of the master object
	*/
	public abstract class AbstractComponentEditor<M> {
	private static final String GREY_SUFFIX = "Grey"; //$NON-NLS-1$

	private static final String CSS_CLASS_KEY = "org.eclipse.e4.ui.css.CssClassName"; //$NON-NLS-1$

	private static final int MAX_IMG_SIZE = 16;

	private final WritableValue<M> master = new WritableValue<>();

	public static final int SEARCH_IMAGE = 0;
	public static final int TABLE_ADD_IMAGE = 1;
	public static final int TABLE_DELETE_IMAGE = 2;
	public static final int ARROW_UP = 3;
	public static final int ARROW_DOWN = 4;

	protected static final int VERTICAL_LIST_WIDGET_INDENT = 10;

	private final List<Image> createdImages = new ArrayList<>();

	@Inject
	private EditingDomain editingDomain;
	@Inject
	private ModelEditor editor;
	@Inject
	public IResourcePool resourcePool;

	@Inject
	@Optional
	protected IProject project;

	@Inject
	@Translation
	protected Messages Messages;

	@Inject
	@Optional
	private ProjectOSGiTranslationProvider translationProvider;


	private Composite editorControl;

	private IdGenerator generator;

	public EditingDomain getEditingDomain() {
	return editingDomain;
	}

	public ModelEditor getEditor() {
	return editor;
	}

	public WritableValue<M> getMaster() {
	return master;
	}

	protected void setElementId(Object element) {
	if (getEditor().isAutoCreateElementId() && element instanceof MApplicationElement) {
	final MApplicationElement el = (MApplicationElement) element;
	if (el.getElementId() == null \|\| el.getElementId().trim().length() == 0) {
	el.setElementId(Util.getDefaultElementId(((EObject) getMaster().getValue()).eResource(), el,
	getEditor().getProject()));
	}
	}
	}

	public Image createImage(String key) {
	return resourcePool.getImageUnchecked(key);
	}

	public ImageDescriptor createImageDescriptor(String key) {
	if (key == null) {
	return null;
	}
	return ImageDescriptor.createFromImage(createImage(key));
	}

	private ImageRegistry getComponentImages() {
	return editor.getComponentImages();
	}

	/**
	* Get the image described in element if this is a MUILabel
	*
	* @param element the element in tree to be displayed
	* @return image of element if iconUri is not empty (returns bad image if bad
	* URI), else returns null
	*/
	public Image getImageFromIconURI(MUILabel element) {

	Image img = null;
	// Returns only an image if there is a non empty Icon URI
	final String iconUri = element.getIconURI();
	if (iconUri != null && iconUri.trim().length() > 0) {
	final boolean greyVersion = shouldBeGrey(element);
	// Is this image already loaded ?
	img = getImage(iconUri, greyVersion);
	if (img == null) {
	// No image registered yet in ImageRegistry...
	final ImageDescriptor desc = getImageDescriptorFromUri(iconUri);

	// Can now add this image in the image registry
	getComponentImages().put(iconUri, desc);
	img = getImage(iconUri, greyVersion);
	}
	}

	return img;
	}

	/** @return true if the image of this element should be displayed in grey */
	private boolean shouldBeGrey(Object element) {
	// It is grey if a MUIElement is not visible or not rendered
	// It is not grey if this is not a MUIElement or if it is rendered and
	// visible.
	return element instanceof MUIElement
	&& !(((MUIElement) element).isToBeRendered() && ((MUIElement) element).isVisible());
	}

	/**
	*
	* @param key the key of image (can be a constants from ResourceProvider or a
	* platform:/ uri location
	* @param grey if true returns the grey version if original image exists
	* @return the image with a give key or grey version.
	*/
	private Image getImage(String key, boolean grey) {

	// try to get image directly with right key and grey value
	Image result = getComponentImages().get(key + (grey ? GREY_SUFFIX : "")); //$NON-NLS-1$

	// may be image not yet created
	if (result == null) {
	result = getComponentImages().get(key);
	// If no image found, ask the resource pool to create it...
	if (result == null && !key.startsWith("platform:")) { //$NON-NLS-1$
	try {
	result = createImage(key);
	} catch (final Exception e) {
	}
	if (result != null) {
	getComponentImages().put(key, result);
	}
	}

	// Create the grey version of image and put it in registry
	if (result != null && grey) {
	final Image greyImg = new Image(result.getDevice(), result, SWT.IMAGE_GRAY);
	getComponentImages().put(key + GREY_SUFFIX, greyImg);
	result = greyImg;
	}
	}
	return result;
	}

	/**
	* Get image from an element Implements algorithm described in bug #465271
	*
	* @param element the Application Element
	* @param key the element image key if no icon URI
	* @return Image or null if nothing found
	*/
	public Image getImage(Object element, String key) {
	Image result = null;

	if (element instanceof MUILabel) {
	result = getImageFromIconURI((MUILabel) element);
	}

	if (result == null) {
	// This is a model element with a key or a MUILabel without IconUri
	final boolean greyVersion = shouldBeGrey(element);
	result = getImage(key, greyVersion);
	}

	return result;

	}

	/**
	* Create a readable ImageDescriptor behind URI.
	*
	* @param uri
	* @return
	*/
	private ImageDescriptor getImageDescriptorFromUri(String uri) {
	ImageDescriptor result = null;

	URL url = findPlatformImage(uri);

	if (url != null) {
	ImageDescriptor imageDesc = ImageDescriptor.createFromURL(url);
	Image scaled = Util.scaleImage(imageDesc.createImage(), MAX_IMG_SIZE);
	createdImages.add(scaled);
	result = ImageDescriptor.createFromImage(scaled);
	}

	return result;
	}

	@SuppressWarnings("resource")
	private static URL findPlatformImage(String uri) {
	// SEVERAL CASES are possible here :
	// * uri = platform:/plugin/myplugin/icons/image.gif
	// * uri = platform:/resource/myplugin/icons/image.gif
	// * uri : platform:/plugin/myplugin/$nl$/icons/image.gif

	// We must check if file exists before creating the ImageDescriptor
	// because ImageRegistry will throw and print a DeviceResourceException
	// With the E4 editors, the platform:/plugin/ is set for
	// runtime, but the file can be in workspace during development In this
	// case, we must rather use platform:/resource/.
	// Used ideas from the ImageTooltip code around line 70 to fix this

	InputStream stream = null;
	URL url = null;

	try {
	final URL uri2url = new URL(uri);
	url = FileLocator.toFileURL(uri2url);
	stream = url.openStream();
	} catch (final IOException e) {
	// If no stream behind this URL, it is probably a platform:/plugin
	// which must be found as a platform:/resource (this case occurs in
	// the model editor when icon URI are set using the dialog)
	url = null;
	if (uri.startsWith("platform:/plugin")) //$NON-NLS-1$
	{
	try {
	// Try to get it using 'platform:/resource'
	final URL resUrl = new URL(uri.replace("platform:/plugin", "platform:/resource")); //$NON-NLS-1$//$NON-NLS-2$
	url = FileLocator.toFileURL(resUrl);
	stream = url.openStream();

	} catch (final IOException e2) {
	// No file behind, may be this is a $nl$ or a $ws$ path..
	// must use find on FileLocator which does not deal with
	// platform:/resource !
	try {
	url = FileLocator.find(new URL(uri));
	stream = url != null ? url.openStream() : null;
	} catch (final IOException ex) {
	url = null;
	// Can't do more !
	}
	}
	}
	}

	if (stream != null) {
	try {
	stream.close();
	} catch (final IOException ex) {
	}
	}
	return url;
	}

	public Image getImage(Object element) {
	return null;
	}


	public abstract String getLabel(Object element);

	public abstract String getDetailLabel(Object element);

	public abstract String getDescription(Object element);

	public Composite getEditor(Composite parent, Object object) {
	if (generator != null) {
	generator.stopGenerating();
	generator = null;
	}
	editorControl = doGetEditor(parent, object);
	return editorControl;
	}

	protected abstract Composite doGetEditor(Composite parent, Object object);

	public abstract IObservableList<?> getChildList(Object element);

	public FeaturePath[] getLabelProperties() {
	return new FeaturePath[] {};
	}

	public List<Action> getActions(Object element) {
	return Collections.emptyList();
	}

	/**
	* Translates an input <code>String</code> using the current
	* {@link ResourceBundleTranslationProvider} and <code>locale</code> from the
	* {@link TranslationService}.
	*
	* @param string the string to translate, may not be null.
	* @return the translated string or the input string if it could not be
	* translated.
	*/
	public String translate(String string) {
	return ControlFactory.tr(translationProvider, string);
	}

	/**
	* @param element
	* @return the list of actions that are populated in the import menu. Can be
	* empty but is never null.
	*/
	public List<Action> getActionsImport(Object element) {
	return Collections.emptyList();
	}

	protected String getLocalizedLabel(MUILabel element) {
	return ControlFactory.getLocalizedLabel(translationProvider, element);
	}

	private boolean isFocusChild(Control control) {
	Control c = control;
	while (c != null && c != editorControl) {
	c = c.getParent();
	}
	return c != null;
	}

	public void handleCopy() {
	if (editorControl != null) {
	final Control focusControl = editorControl.getDisplay().getFocusControl();

	if (isFocusChild(focusControl) && focusControl.getData(ControlFactory.COPY_HANDLER) != null) {
	((Handler) focusControl.getData(ControlFactory.COPY_HANDLER)).copy();
	}
	}
	}

	public void handlePaste() {
	if (editorControl != null) {
	final Control focusControl = editorControl.getDisplay().getFocusControl();

	if (isFocusChild(focusControl) && focusControl.getData(ControlFactory.COPY_HANDLER) != null) {
	((Handler) focusControl.getData(ControlFactory.COPY_HANDLER)).paste();
	}
	}
	}

	public void handleCut() {
	if (editorControl != null) {
	final Control focusControl = editorControl.getDisplay().getFocusControl();

	if (isFocusChild(focusControl) && focusControl.getData(ControlFactory.COPY_HANDLER) != null) {
	((Handler) focusControl.getData(ControlFactory.COPY_HANDLER)).cut();
	}
	}
	}

	protected Composite createScrollableContainer(Composite parent) {
	final ScrolledComposite scrolling = new ScrolledComposite(parent, SWT.H_SCROLL \| SWT.V_SCROLL);
	scrolling.setBackgroundMode(SWT.INHERIT_DEFAULT);
	scrolling.setData(CSS_CLASS_KEY, "formContainer"); //$NON-NLS-1$

	final Composite contentContainer = new Composite(scrolling, SWT.NONE);

	contentContainer.setData(CSS_CLASS_KEY, "formContainer"); //$NON-NLS-1$
	scrolling.setExpandHorizontal(true);
	scrolling.setExpandVertical(true);
	scrolling.setContent(contentContainer);

	scrolling.addControlListener(new ControlAdapter() {
	@Override
	public void controlResized(ControlEvent e) {
	final Rectangle r = scrolling.getClientArea();
	scrolling.setMinSize(contentContainer.computeSize(r.width, SWT.DEFAULT));
	}
	});

	scrolling.setLayoutData(new GridData(GridData.FILL_BOTH));

	final GridLayout gl = new GridLayout(3, false);
	gl.horizontalSpacing = 10;
	contentContainer.setLayout(gl);

	return contentContainer;
	}

	protected void createContributedEditorTabs(CTabFolder folder, EMFDataBindingContext context,
	WritableValue<M> master, Class<? super M> clazz) {
	final List<AbstractElementEditorContribution> contributionList = editor.getTabContributionsForClass(clazz);

	for (final AbstractElementEditorContribution eec : contributionList) {
	final CTabItem item = new CTabItem(folder, SWT.BORDER);
	item.setText(eec.getTabLabel());

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

	eec.createContributedEditorTab(parent, context, master, getEditingDomain(), project);
	}

	}

	/**
	* Generates an ID when the another field changes. Must be called after master
	* is set with the objects value.
	*
	* @param attSource The source attribute
	* @param attId The id attribute to generate
	* @param control optional control to disable generator after losing focus or
	* disposing
	*/
	protected void enableIdGenerator(EAttribute attSource, EAttribute attId, Control control) {
	if (generator != null) {
	generator.stopGenerating();
	generator = null;
	}
	if (getEditor().isAutoCreateElementId()) {
	generator = new IdGenerator();
	@SuppressWarnings("unchecked")
	IValueProperty<M, String> addSourceProp = EMFEditProperties.value(getEditingDomain(), attSource);
	@SuppressWarnings("unchecked")
	IValueProperty<M, String> attIdProp = EMFEditProperties.value(getEditingDomain(), attId);
	generator.bind(getMaster(), addSourceProp, attIdProp, control);
	}
	}

	@PreDestroy
	public void dispose() {
	createdImages.stream().filter(Objects::nonNull).filter(i -> !i.isDisposed()).forEach(Image::dispose);
	}

	}