SVGUseTranslator.java

/*
 * Copyright 2017 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.kie.workbench.common.stunner.svg.gen.translator.impl;

import org.kie.workbench.common.stunner.svg.gen.exception.TranslatorException;
import org.kie.workbench.common.stunner.svg.gen.model.ViewRefDefinition;
import org.kie.workbench.common.stunner.svg.gen.model.impl.ViewRefDefinitionImpl;
import org.kie.workbench.common.stunner.svg.gen.translator.SVGDocumentTranslator;
import org.kie.workbench.common.stunner.svg.gen.translator.SVGElementTranslator;
import org.kie.workbench.common.stunner.svg.gen.translator.SVGTranslatorContext;
import org.w3c.dom.Element;

public class SVGUseTranslator implements SVGElementTranslator<Element, ViewRefDefinition> {

    public static final String HREF = "href";
    public static final String TAG_NAME = "use";

    @Override
    public String getTagName() {
        return "use";
    }

    @Override
    public ViewRefDefinition translate(final Element element,
                                       final SVGTranslatorContext context) throws TranslatorException {
        final String href = element.getAttributeNS(SVGDocumentTranslator.XLINK_URI,
                                                   HREF);
        // task-manual.svg#shape
        final int i2 = href.lastIndexOf("#");
        final String viewName = href.substring(0,
                                               i2);
        final String refViewId = href.substring(i2 + 1,
                                                href.length());
        final String parent = getId((Element) element.getParentNode());
        return new ViewRefDefinitionImpl(href,
                                         parent,
                                         viewName,
                                         refViewId);
    }

    @Override
    public Class<Element> getInputType() {
        return Element.class;
    }

    private String getId(final Element element) {
        return element.getAttribute("id");
    }
}