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/*****************************************************************************
 * Copyright (c) 2011 CEA LIST.
 *
 * 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:
 *
 *		CEA LIST - Initial API and implementation
 *      Vincent Lorenzo (CEA-LIST) - vincent.lorenzo@cea.fr (bug 493876)
 *****************************************************************************/
package org.eclipse.papyrus.uml.diagram.common.edit.part;

import java.util.List;

import org.eclipse.draw2d.IFigure;
import org.eclipse.draw2d.StackLayout;
import org.eclipse.draw2d.geometry.Dimension;
import org.eclipse.draw2d.geometry.Point;
import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.gef.EditPart;
import org.eclipse.gef.EditPolicy;
import org.eclipse.gef.editpolicies.LayoutEditPolicy;
import org.eclipse.gmf.runtime.diagram.ui.editpolicies.EditPolicyRoles;
import org.eclipse.gmf.runtime.diagram.ui.figures.IBorderItemLocator;
import org.eclipse.gmf.runtime.draw2d.ui.figures.FigureUtilities;
import org.eclipse.gmf.runtime.gef.ui.figures.DefaultSizeNodeFigure;
import org.eclipse.gmf.runtime.gef.ui.figures.NodeFigure;
import org.eclipse.gmf.runtime.notation.Edge;
import org.eclipse.gmf.runtime.notation.NotationPackage;
import org.eclipse.gmf.runtime.notation.View;
import org.eclipse.gmf.tooling.runtime.linklf.LinkLFNodeFigure;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.preference.PreferenceConverter;
import org.eclipse.papyrus.infra.gmfdiag.common.editpolicies.DefaultGraphicalNodeEditPolicy;
import org.eclipse.papyrus.infra.gmfdiag.common.editpolicies.DefaultSemanticEditPolicy;
import org.eclipse.papyrus.infra.gmfdiag.common.preferences.PreferencesConstantsHelper;
import org.eclipse.papyrus.infra.gmfdiag.preferences.utils.GradientPreferenceConverter;
import org.eclipse.papyrus.sysml.diagram.common.Activator;
import org.eclipse.papyrus.uml.diagram.common.editparts.AbstractBorderEditPart;
import org.eclipse.papyrus.uml.diagram.common.figure.node.AffixedNamedElementFigure;
import org.eclipse.papyrus.uml.diagram.common.helper.PreferenceInitializerForElementHelper;
import org.eclipse.swt.graphics.Color;

/**
 * Abstract non-diagram specific edit part for border node.
 * This class is adapted from edit parts generated by GMF Tooling.
 */
public abstract class AbstractElementBorderEditPart extends AbstractBorderEditPart {

	protected IFigure contentPane;

	protected IFigure primaryShape;

	public AbstractElementBorderEditPart(View view) {
		super(view);
	}

	@Override
	protected void createDefaultEditPolicies() {
		super.createDefaultEditPolicies();
		installEditPolicy(EditPolicyRoles.SEMANTIC_ROLE, new DefaultSemanticEditPolicy());
		installEditPolicy(EditPolicy.GRAPHICAL_NODE_ROLE, new DefaultGraphicalNodeEditPolicy());
		installEditPolicy(EditPolicy.LAYOUT_ROLE, createLayoutEditPolicy());
	}

	protected abstract LayoutEditPolicy createLayoutEditPolicy();

	protected IFigure createNodeShape() {
		return primaryShape = new AffixedNamedElementFigure();
	}

	@Override
	public AffixedNamedElementFigure getPrimaryShape() {
		return (AffixedNamedElementFigure) primaryShape;
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public IBorderItemLocator getBorderItemLocator() {
		IFigure parentFigure = getFigure().getParent();
		if (parentFigure != null && parentFigure.getLayoutManager() != null) {
			Object constraint = parentFigure.getLayoutManager().getConstraint(getFigure());
			return (IBorderItemLocator) constraint;
		}
		return null;
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	protected void handleNotificationEvent(Notification event) {
		// When a node has external node labels, the methods refreshChildren() removes the label's
		// edit part from the registry. Once removed from the registry the visibility cannot be set back to visible.

		// Copied from generated code for Affixed nodes to fix:
		// 366504: [SysML Block Definition Diagram] Cannot make masked labels of border items (Port) visible
		// https://bugs.eclipse.org/bugs/show_bug.cgi?id=366504
		// 366503: [SysML Internal Block Diagram] Cannot make masked labels of border items (Port) visible
		// https://bugs.eclipse.org/bugs/show_bug.cgi?id=366503

		// (this sounds strange as the "Show all labels" manages to get labels back without trouble...).
		if (NotationPackage.eINSTANCE.getView_Visible().equals(event.getFeature())) {
			Object notifier = event.getNotifier();
			List<?> modelChildren = ((View) getModel()).getChildren();
			if (!(notifier instanceof Edge)) {
				if (modelChildren.contains(event.getNotifier())) {
					return;
				}
			}
		}
		super.handleNotificationEvent(event);
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	protected void refreshBounds() {
		if (getBorderItemLocator() != null) {
			int x = ((Integer) getStructuralFeatureValue(NotationPackage.eINSTANCE.getLocation_X())).intValue();
			int y = ((Integer) getStructuralFeatureValue(NotationPackage.eINSTANCE.getLocation_Y())).intValue();
			Point loc = new Point(x, y);

			int width = ((Integer) getStructuralFeatureValue(NotationPackage.eINSTANCE.getSize_Width())).intValue();
			int height = ((Integer) getStructuralFeatureValue(NotationPackage.eINSTANCE.getSize_Height())).intValue();
			Dimension size = new Dimension(width, height);

			// Update locator constraint
			IBorderItemLocator locator = getBorderItemLocator();
			locator.setConstraint(new Rectangle(loc, size));

			// Set new constraint on parent figure
			getFigure().getParent().setConstraint(getFigure(), locator);

		} else {
			super.refreshBounds();
		}
	}

	protected NodeFigure createNodePlate() {
		String prefElementId = getNotationView().getType();
		IPreferenceStore store = Activator.getInstance().getPreferenceStore();
		String preferenceConstantWitdh = PreferenceInitializerForElementHelper.getpreferenceKey(getNotationView(), prefElementId, PreferencesConstantsHelper.WIDTH);
		String preferenceConstantHeight = PreferenceInitializerForElementHelper.getpreferenceKey(getNotationView(), prefElementId, PreferencesConstantsHelper.HEIGHT);
		DefaultSizeNodeFigure result = new LinkLFNodeFigure(this,store.getInt(preferenceConstantWitdh), store.getInt(preferenceConstantHeight));

		// FIXME: workaround for #154536
		result.getBounds().setSize(result.getPreferredSize());
		return result;
	}

	@Override
	protected NodeFigure createMainFigure() {
		NodeFigure figure = createNodePlate();
		figure.setLayoutManager(new StackLayout());
		IFigure shape = createNodeShape();
		figure.add(shape);
		contentPane = setupContentPane(shape);
		return figure;
	}

	protected IFigure setupContentPane(IFigure nodeShape) {
		return nodeShape; // use nodeShape itself as contentPane
	}

	/**
	 * @generated
	 */
	@Override
	public IFigure getContentPane() {
		if (contentPane != null) {
			return contentPane;
		}
		return super.getContentPane();
	}

	@Override
	protected void setForegroundColor(Color color) {
		if (primaryShape != null) {
			primaryShape.setForegroundColor(color);
		}
	}

	@Override
	public abstract EditPart getPrimaryChildEditPart();

	@Override
	public Object getPreferredValue(EStructuralFeature feature) {
		String prefKey = getNotationView().getType();

		IPreferenceStore store = (IPreferenceStore) getDiagramPreferencesHint().getPreferenceStore();
		Object result = null;

		if (feature == NotationPackage.eINSTANCE.getLineStyle_LineColor() || feature == NotationPackage.eINSTANCE.getFontStyle_FontColor() || feature == NotationPackage.eINSTANCE.getFillStyle_FillColor()) {

			String prefColor = null;
			if (feature == NotationPackage.eINSTANCE.getLineStyle_LineColor()) {
				prefColor = PreferencesConstantsHelper.getElementConstant(prefKey, PreferencesConstantsHelper.COLOR_LINE);

			} else if (feature == NotationPackage.eINSTANCE.getFontStyle_FontColor()) {
				prefColor = PreferencesConstantsHelper.getElementConstant(prefKey, PreferencesConstantsHelper.COLOR_FONT);

			} else if (feature == NotationPackage.eINSTANCE.getFillStyle_FillColor()) {
				prefColor = PreferencesConstantsHelper.getElementConstant(prefKey, PreferencesConstantsHelper.COLOR_FILL);

			}
			result = FigureUtilities.RGBToInteger(PreferenceConverter.getColor(store, prefColor));

		} else if (feature == NotationPackage.eINSTANCE.getFillStyle_Transparency() || feature == NotationPackage.eINSTANCE.getFillStyle_Gradient()) {

			String prefGradient = PreferencesConstantsHelper.getElementConstant(prefKey, PreferencesConstantsHelper.COLOR_GRADIENT);
			GradientPreferenceConverter gradientPreferenceConverter = new GradientPreferenceConverter(store.getString(prefGradient));
			if (feature == NotationPackage.eINSTANCE.getFillStyle_Transparency()) {
				result = new Integer(gradientPreferenceConverter.getTransparency());

			} else if (feature == NotationPackage.eINSTANCE.getFillStyle_Gradient()) {
				result = gradientPreferenceConverter.getGradientData();

			}
		}

		if (result == null) {
			result = getStructuralFeatureValue(feature);
		}
		return result;
	}
}

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