org.eclipse.xtext.formatting2.regionaccess.internal.NodeModelBasedRegionAccess.java Source code

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Here is the source code for org.eclipse.xtext.formatting2.regionaccess.internal.NodeModelBasedRegionAccess.java

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/*******************************************************************************
 * Copyright (c) 2014 itemis AG (http://www.itemis.eu) and others.
 * 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
 *******************************************************************************/
package org.eclipse.xtext.formatting2.regionaccess.internal;

import java.util.Map;

import org.eclipse.emf.ecore.EObject;
import org.eclipse.xtext.formatting2.regionaccess.IEObjectRegion;
import org.eclipse.xtext.formatting2.regionaccess.ITextSegment;
import org.eclipse.xtext.resource.XtextResource;

import com.google.common.collect.ImmutableMap;

/**
 * @author Moritz Eysholdt - Initial contribution and API
 */
public class NodeModelBasedRegionAccess extends AbstractRegionAccess {

    private final Map<EObject, AbstractEObjectRegion> eObjectToTokens;
    private final XtextResource resource;

    protected NodeModelBasedRegionAccess(NodeModelBasedRegionAccessBuilder builder) {
        this.resource = builder.getXtextResource();
        this.eObjectToTokens = ImmutableMap.copyOf(builder.getEObjectToTokensMap(this));
    }

    @Override
    public XtextResource getResource() {
        return this.resource;
    }

    @Override
    protected String getText() {
        return getResource().getParseResult().getRootNode().getText();
    }

    @Override
    public String textForOffset(int offset, int length) {
        return getResource().getParseResult().getRootNode().getText().substring(offset, offset + length);
    }

    @Override
    public AbstractEObjectRegion regionForEObject(EObject obj) {
        return eObjectToTokens.get(obj);
    }

    @Override
    public IEObjectRegion regionForRootEObject() {
        return regionForEObject(resource.getContents().get(0));
    }

    @Override
    public ITextSegment regionForDocument() {
        return new TextSegment(this, 0, resource.getParseResult().getRootNode().getTotalEndOffset());
    }

    @Override
    public boolean hasSyntaxError() {
        return resource.getParseResult().hasSyntaxErrors();
    }

}