org.jhotdraw8.draw.css.converter.AwtPathCssConverter Maven / Gradle / Ivy
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/*
* @(#)CssAwtSvgPathConverter.java
* Copyright © 2023 The authors and contributors of JHotDraw. MIT License.
*/
package org.jhotdraw8.draw.css.converter;
import org.jhotdraw8.base.converter.IdResolver;
import org.jhotdraw8.base.converter.IdSupplier;
import org.jhotdraw8.css.converter.AbstractCssConverter;
import org.jhotdraw8.css.parser.CssToken;
import org.jhotdraw8.css.parser.CssTokenType;
import org.jhotdraw8.css.parser.CssTokenizer;
import org.jhotdraw8.geom.AwtPathBuilder;
import org.jhotdraw8.geom.SvgPaths;
import org.jspecify.annotations.Nullable;
import java.awt.*;
import java.awt.geom.Path2D;
import java.io.IOException;
import java.text.ParseException;
import java.util.function.Consumer;
/**
* Converts an SVG path to a AWT path.
*
* The null value will be converted to the CSS identifier "none".
*
* @author Werner Randelshofer
*/
public class AwtPathCssConverter extends AbstractCssConverter {
public AwtPathCssConverter(boolean nullable) {
super(nullable);
}
@Override
public Path2D.Double parseNonNull(CssTokenizer tt, @Nullable IdResolver idResolver) throws ParseException, IOException {
tt.requireNextToken(CssTokenType.TT_STRING, "⟨SvgPath⟩: String expected.");
final String svgPathString = tt.currentStringNonNull();
try {
final AwtPathBuilder builder = new AwtPathBuilder();
SvgPaths.buildSvgString(builder, svgPathString);
return builder.build();
} catch (final ParseException ex) {
final Path2D.Double p = new Path2D.Double();
p.moveTo(0, 0);
p.lineTo(10, 0);
p.lineTo(10, 10);
p.lineTo(0, 10);
p.closePath();
p.trimToSize();
return p;
}
}
@Override
protected void produceTokensNonNull(TT value, @Nullable IdSupplier idSupplier, Consumer out) {
out.accept(new CssToken(CssTokenType.TT_STRING, SvgPaths.awtPathIteratorToDoubleSvgString(((Shape) value).getPathIterator(null))));
}
@Override
public @Nullable String getHelpText() {
String buf = """
Format of ⟨SvgPath⟩: " ⟨moveTo ⟩｛ moveTo｜⟨lineTo⟩｜⟨quadTo⟩｜⟨cubicTo⟩｜⟨arcTo⟩｜⟨closePath⟩ ｝ "
Format of ⟨moveTo ⟩: M ⟨x⟩ ⟨y⟩ ｜m ⟨dx⟩ ⟨dy⟩\s
Format of ⟨lineTo ⟩: L ⟨x⟩ ⟨y⟩ ｜l ⟨dx⟩ ⟨dy⟩ | H ⟨x⟩ | h ⟨dx⟩ | V ⟨y⟩ | v ⟨dy⟩
Format of ⟨quadTo ⟩: Q ⟨x⟩ ⟨y⟩ ⟨x1⟩ ⟨y1⟩ ｜q ⟨dx⟩ ⟨dy⟩ ⟨x1⟩ ⟨y1⟩ ｜T ⟨x⟩ ⟨y⟩ ｜t ⟨dx⟩ ⟨dy⟩
Format of ⟨cubicTo ⟩: C ⟨x⟩ ⟨y⟩ ⟨x1⟩ ⟨y1⟩ ⟨x2⟩ ⟨y2⟩ ｜c ⟨dx⟩ ⟨dy⟩ ⟨dx1⟩ ⟨dy1⟩ ⟨dx2⟩ ⟨dy2⟩｜ S ⟨x⟩ ⟨y⟩ ⟨x1⟩ ⟨y1⟩ ｜s ⟨dx⟩ ⟨dy⟩ ⟨dx1⟩ ⟨dy1⟩
Format of ⟨arcTo ⟩: A ⟨x⟩ ⟨y⟩ ⟨r1⟩ ⟨r2⟩ ⟨angle⟩ ⟨larrgeArcFlag⟩ ⟨sweepFlag⟩ ｜a ⟨dx⟩ ⟨dy⟩ ⟨r1⟩ ⟨r2⟩ ⟨angle⟩ ⟨larrgeArcFlag⟩ ⟨sweepFlag⟩\s
Format of ⟨closePath ⟩: Z ｜z\s""";
return buf;
}
@Override
public Path2D.@Nullable Double getDefaultValue() {
return null;
}
}