/*

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 * and open the template in the editor.

 */

package net.java.html.canvas;

import java.util.ServiceLoader;

/**

 *

 * @author antonepple

 */

public abstract class GraphicsEnvironment {

    private static GraphicsEnvironment DEFAULT;

    public GraphicsEnvironment getDefault() {

        if (DEFAULT == null) {

            ServiceLoader<GraphicsEnvironment> loader = ServiceLoader.load(GraphicsEnvironment.class);

            DEFAULT = loader.iterator().next();

        }

        return DEFAULT == null ? getDummyInstance() : DEFAULT;

    }

    public abstract Image getImageForPath(String path);

    public abstract LinearGradient createLinearGradient();

    public abstract Pattern createPattern();

    public abstract RadialGradient createRadialGradient();

    public abstract TextMetrics createTextMetrics();

    private GraphicsEnvironment getDummyInstance() {

        return new GraphicsEnvironment() {

            @Override

            public Image getImageForPath(String path) {

               return new Image() {

                   @Override

                   public int getHeight() {

                     return 0;

                   }

                   @Override

                   public int getWidth() {

                       return 0;

                   }

               };

            }

            @Override

            public LinearGradient createLinearGradient() {

                return new LinearGradient() {

                    @Override

                    public void addColorStop(double position, String color) {

                    }

                };

            }

            @Override

            public Pattern createPattern() {

               return new Pattern() {

};

            }

            @Override

            public RadialGradient createRadialGradient() {

                return new RadialGradient() {

                    @Override

                    public void addColorStop(double position, String color) {

                    }

                };

            }

            @Override

            public TextMetrics createTextMetrics() {

                return new TextMetrics() {

                    @Override

                    public double getHeight() {

                        return 0;

                    }

                    @Override

                    public double getWidth() {

                        return 0;

                    }

                };

            }

        };

    }

}