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/*
 * Copyright (c) 2012, 2021, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
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 */

package javafx.css.converter;

import javafx.css.ParsedValue;
import javafx.css.StyleConverter;
import javafx.scene.shape.SVGPath;
import javafx.scene.shape.Shape;
import javafx.scene.text.Font;

import java.util.Map;

/**
 * Converter to convert a SVG shape string into a {@code Shape} object.
 *
 * @since 9
 */
public class ShapeConverter extends StyleConverter {
    private static final ShapeConverter INSTANCE = new ShapeConverter();

    /**
     * Gets the {@code ShapeConverter} instance.
     * @return the {@code ShapeConverter} instance
     */
    public static StyleConverter getInstance() { return INSTANCE; }

    private ShapeConverter() {
    }

    @Override public Shape convert(ParsedValue value, Font font) {

        Shape shape = super.getCachedValue(value);
        if (shape != null) return shape;

        String svg = value.getValue();
        if (svg == null || svg.isEmpty()) return null;
        SVGPath path = new SVGPath();
        path.setContent(svg);

        super.cacheValue(value, path);

        return path;
    }

    private static Map, Shape> cache;

    /**
     * Clears the {@code ShapeConverter} cache.
     */
    public static void clearCache() { if (cache != null) cache.clear(); }

}