[398367] Adds Papyrus CSS customization support.

[EMFCompare2.git] / plugins / org.eclipse.emf.compare.diagram.ide.ui.papyrus / src / org / eclipse / emf / compare / diagram / ide / ui / papyrus / internal / CssInstallationHook.java

/*******************************************************************************
 * Copyright (c) 2014 Obeo.
 * 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:
 *     Obeo - initial API and implementation
 *******************************************************************************/
package org.eclipse.emf.compare.diagram.ide.ui.papyrus.internal;

import java.util.Collection;

import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.compare.ide.hook.IResourceSetHook;
import org.eclipse.emf.ecore.resource.ResourceSet;
import org.eclipse.papyrus.infra.gmfdiag.css.helper.CSSHelper;

/**
 * Hook in the EMF Compare {@link ResourceSet} in order to make it able to handle papyrus CSS features.
 * 
 * @author <a href="mailto:arthur.daussy@obeo.fr">Arthur Daussy</a>
 */
public class CssInstallationHook implements IResourceSetHook {

        /**
         * {@inheritDoc}
         * 
         * @see org.eclipse.emf.compare.ide.internal.utils.IResourceSetHook#handle(java.lang.Iterable)
         */
        public boolean isHookFor(Collection<? extends URI> uris) {
                // Looks for a papyrus notation file.
                for (URI uri : uris) {
                        // FIXME this is a realy weak test. We can not use the
                        // triple of papyrus file "x.di", "x.notation" and "x.uml" since one or more of these files might
                        // not be part of the uri list. This might change soon since we might need to force loading uml if
                        // the notation file is loaded see https://bugs.eclipse.org/bugs/show_bug.cgi?id=443187.
                        if ("notation".equals(uri.fileExtension())) { //$NON-NLS-1$
                                return true;
                        }
                }
                return false;
        }

        /**
         * {@inheritDoc}
         * 
         * @see org.eclipse.emf.compare.ide.hook.IResourceSetHook#preLoadingHook(org.eclipse.emf.ecore.resource.ResourceSet,
         *      java.util.Collection)
         */
        public void preLoadingHook(ResourceSet resourceSet, Collection<? extends URI> uris) {
                if (!CSSHelper.isCSSSupported(resourceSet)) {
                        CSSHelper.installCSSSupport(resourceSet);
                }

        }

        /**
         * {@inheritDoc}
         * 
         * @see org.eclipse.emf.compare.ide.hook.IResourceSetHook#postLoadingHook(org.eclipse.emf.ecore.resource.ResourceSet,
         *      java.util.Collection)
         */
        public void postLoadingHook(ResourceSet resourceSet, Collection<? extends URI> uris) {
                // Nothing to do
        }

}