redocs/org.eclipse.statet.redocs.tex.r/src/org/eclipse/statet/internal/redocs/tex/r/ui/sourceediting/DocROutlineContentProvider.java

/*=============================================================================#
 # Copyright (c) 2014, 2019 Stephan Wahlbrink and others.
 # 
 # This program and the accompanying materials are made available under the
 # terms of the Eclipse Public License 2.0 which is available at
 # https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
 # which is available at https://www.apache.org/licenses/LICENSE-2.0.
 # 
 # SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
 # 
 # Contributors:
 #     Stephan Wahlbrink <sw@wahlbrink.eu> - initial API and implementation
 #=============================================================================*/

package org.eclipse.statet.internal.redocs.tex.r.ui.sourceediting;

import org.eclipse.statet.docmlet.tex.core.model.ITexSourceElement;
import org.eclipse.statet.docmlet.tex.core.model.TexModel;
import org.eclipse.statet.ltk.model.core.elements.IEmbeddedForeignElement;
import org.eclipse.statet.ltk.model.core.elements.ISourceStructElement;
import org.eclipse.statet.ltk.ui.sourceediting.OutlineContentProvider;
import org.eclipse.statet.redocs.r.core.model.RedocsRChunkElement;


public class DocROutlineContentProvider extends OutlineContentProvider {
	
	
	public DocROutlineContentProvider(final IOutlineContent content) {
		super(content);
	}
	
	
	@Override
	public Object getParent(final Object element) {
		final Object parent= super.getParent(element);
		if (parent instanceof RedocsRChunkElement) {
			return ((ISourceStructElement) element).getSourceParent();
		}
		return parent;
	}
	
	@Override
	public boolean hasChildren(final Object element) {
		final ISourceStructElement e= (ISourceStructElement) element;
		if (e.getModelTypeId() == TexModel.LTX_TYPE_ID
				&& e.getElementType() == ITexSourceElement.C1_EMBEDDED) {
			final ISourceStructElement foreignElement= ((IEmbeddedForeignElement) e).getForeignElement();
			return (foreignElement != null
					&& foreignElement.hasSourceChildren(getContent().getContentFilter()) );
		}
		return super.hasChildren(element);
	}
	
	@Override
	public Object[] getChildren(final Object parentElement) {
		if (parentElement instanceof ISourceStructElement) {
			final ISourceStructElement e= (ISourceStructElement) parentElement;
			if (e.getModelTypeId() == TexModel.LTX_TYPE_ID
					&& e.getElementType() == ITexSourceElement.C1_EMBEDDED) {
				final ISourceStructElement foreignElement= ((IEmbeddedForeignElement) e).getForeignElement();
				return foreignElement.getSourceChildren(getContent().getContentFilter()).toArray();
			}
		}
		return super.getChildren(parentElement);
	}
	
}