es.cv.gvcase.mdt.common.edit.parts.CachedEditPartFactory.java Source code

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/*******************************************************************************
 * Copyright (c) 2008 Conselleria de Infraestructuras y Transporte, Generalitat 
 * de la Comunitat Valenciana . 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: Francisco Javier Cano Muoz (Prodevelop)  Initial implementation.
 *
 ******************************************************************************/
package es.cv.gvcase.mdt.common.edit.parts;

import org.eclipse.gef.EditPart;
import org.eclipse.gef.EditPartFactory;
import org.eclipse.gef.EditPartViewer;
import org.eclipse.gmf.runtime.diagram.ui.editparts.GraphicalEditPart;
import org.eclipse.gmf.runtime.diagram.ui.parts.DiagramGraphicalViewer;
import org.eclipse.gmf.runtime.notation.Diagram;
import org.eclipse.gmf.runtime.notation.FontStyle;
import org.eclipse.gmf.runtime.notation.NotationPackage;
import org.eclipse.gmf.runtime.notation.Style;
import org.eclipse.gmf.runtime.notation.View;
import org.eclipse.jface.resource.FontDescriptor;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.resource.ResourceManager;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;

// TODO: Auto-generated Javadoc
/**
 * A factory for creating CachedEditPart objects.
 */
public abstract class CachedEditPartFactory implements EditPartFactory {

    /* (non-Javadoc)
     * @see org.eclipse.gef.EditPartFactory#createEditPart(org.eclipse.gef.EditPart, java.lang.Object)
     */
    public EditPart createEditPart(EditPart context, Object model) {

        if (model instanceof View && model instanceof Diagram == false) {
            View view = (View) model;
            EditPart editPart = CachedEditPartsRegistry.getEditPart(view);
            if (editPart != null) {
                editPart.getChildren().clear();
                if (editPart instanceof GraphicalEditPart) {
                    Style style = view.getStyle(NotationPackage.eINSTANCE.getFontStyle());
                    if (style instanceof FontStyle) {
                        setEditPartFont((GraphicalEditPart) editPart, (FontStyle) style);
                    }
                }
                return editPart;
            }
            editPart = createRealEditPart(context, model);
            if (editPart != null) {
                CachedEditPartsRegistry.putEditPart(view, editPart);
            }
            return editPart;
        }
        return null;
    }

    /**
     * Sets the edit part font.
     * 
     * @param editPart the edit part
     * @param style the style
     */
    private static void setEditPartFont(GraphicalEditPart editPart, FontStyle style) {
        FontData fontData = new FontData(style.getFontName(), style.getFontHeight(),
                (style.isBold() ? SWT.BOLD : SWT.NORMAL) | (style.isItalic() ? SWT.ITALIC : SWT.NORMAL));
        Font newFont = getResourceManager(editPart).createFont(FontDescriptor.createFrom(fontData));
        editPart.getFigure().setFont(newFont);
    }

    /**
     * Gets the resource manager.
     * 
     * @param editPart the edit part
     * 
     * @return the resource manager
     */
    private static ResourceManager getResourceManager(EditPart editPart) {
        EditPartViewer viewer = editPart.getViewer();
        if (viewer instanceof DiagramGraphicalViewer) {
            return ((DiagramGraphicalViewer) viewer).getResourceManager();
        }
        return JFaceResources.getResources();
    }

    /**
     * Creates a new CachedEditPart object.
     * 
     * @param editPart the edit part
     * @param model the model
     * 
     * @return the edits the part
     */
    protected abstract EditPart createRealEditPart(EditPart editPart, Object model);

}