org.jhotdraw8.draw.css.converter.FXPathElementsCssConverter Maven / Gradle / Ivy
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/*
* @(#)CssFXPathElementsConverter.java
* Copyright © 2023 The authors and contributors of JHotDraw. MIT License.
*/
package org.jhotdraw8.draw.css.converter;
import javafx.scene.shape.ClosePath;
import javafx.scene.shape.LineTo;
import javafx.scene.shape.MoveTo;
import javafx.scene.shape.PathElement;
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.FXSvgPaths;
import org.jhotdraw8.icollection.VectorList;
import org.jhotdraw8.icollection.immutable.ImmutableList;
import org.jspecify.annotations.Nullable;
import java.io.IOException;
import java.text.ParseException;
import java.util.ArrayList;
import java.util.List;
import java.util.function.Consumer;
/**
* Converts an SVG path to a list of {@link PathElement}s.
*
* The {@code null} value will be converted to the CSS identifier {@code none}.
*
* @author Werner Randelshofer
*/
public class FXPathElementsCssConverter extends AbstractCssConverter> {
public FXPathElementsCssConverter(boolean nullable) {
super(nullable);
}
@Override
public ImmutableList parseNonNull(CssTokenizer tt, @Nullable IdResolver idResolver) throws ParseException, IOException {
tt.requireNextToken(CssTokenType.TT_STRING, "⟨SvgPath⟩: String expected.");
final String svgPathString = tt.currentStringNonNull();
try {
final List pathElements = FXSvgPaths.svgStringToPathElements(svgPathString);
return VectorList.copyOf(pathElements);
} catch (final ParseException ex) {
List p = new ArrayList<>();
p.add(new MoveTo(0, 0));
p.add(new LineTo(10, 0));
p.add(new LineTo(10, 10));
p.add(new LineTo(0, 10));
p.add(new ClosePath());
return VectorList.copyOf(p);
}
}
@Override
protected > void produceTokensNonNull(TT value, @Nullable IdSupplier idSupplier, Consumer out) {
out.accept(new CssToken(CssTokenType.TT_STRING, FXSvgPaths.pathElementsToDoubleSvgString(value.asList())));
}
@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 @Nullable ImmutableList getDefaultValue() {
return isNullable() ? null : VectorList.of();
}
}