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/*
* @(#)CssTransformConverter.java
* Copyright © 2023 The authors and contributors of JHotDraw. MIT License.
*/
package org.jhotdraw8.draw.css.converter;
import javafx.geometry.Point3D;
import javafx.scene.transform.Affine;
import javafx.scene.transform.Rotate;
import javafx.scene.transform.Scale;
import javafx.scene.transform.Shear;
import javafx.scene.transform.Transform;
import javafx.scene.transform.Translate;
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.jspecify.annotations.Nullable;
import java.io.IOException;
import java.text.ParseException;
import java.util.ArrayList;
import java.util.List;
import java.util.function.Consumer;
/**
* CssTransformConverter.
*
* Parses a transform given in the following EBNF:
*
* Transform = ( Affine | Matrix | Translate | Scale | Rotate | Shear ) ;
*
* Affine = "affine(" , [S] ,
* ( mxx , C, mxy, C, tx, C, myx, C, myy, C, ty
* | mxx , C, mxy, C, mxz, C, tx, C, myx, C, myy, C, myz, C, tz, C, mzx, C, mzy, C, mzz, C, tz)
* ) , [S], ")" ;
* Matrix = "matrix(" , [S] ,
* ( mxx , C, myx, C, mxy, C, myy, C, tx, C, ty
* | mxx , C, myx, C, mzx, C, mxy, C, myy, C, mzy, C, mxz, C, myz, C, mzz, C, tx, C, ty, C, tz)
* ) , [S], ")" ;
* Translate = "translate(" , [S] , tx , [ C , ty, [ C , tz ] ] , [S], ")" ;
* Scale = "scale(" , [S] ,
* ( sx , [ C , sy, [ C , Pivot2D ] ]
* | sx , C , sy, C , sz, [ C , Pivot ]
* ) , [S], ")" ;
* Rotate = "rotate(" , [S] ,
* rotate-angle , [ C , Pivot , [ C, Axis ] , [S], ")" ;
*
* Shear = "shear(" , [S] , x , Sep , y , [ Sep , Pivot2D ], [S], ")" ;
*
* Axis = axisX, Sep , axisY, Sep , axisZ ;
* Pivot = pivotX, Sep , pivotY, [ Sep , pivotZ ] ;
* Pivot2D = pivotX, Sep , pivotY] ;
*
* C = ( S , { S } | { S } , "," , { S } ) ;
* S = (* white space *)
*
*
* @author Werner Randelshofer
*/
public class TransformCssConverter extends AbstractCssConverter {
public TransformCssConverter() {
this(true);
}
public TransformCssConverter(boolean nullable) {
super(nullable);
}
@Override
protected void produceTokensNonNull(TT tx, @Nullable IdSupplier idSupplier, Consumer out) {
if (tx instanceof Translate tr) {
out.accept(new CssToken(CssTokenType.TT_FUNCTION, "translate"));
out.accept(new CssToken(CssTokenType.TT_NUMBER, tr.getTx()));
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_NUMBER, tr.getTy()));
if (tr.getTz() != 0.0) {
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_NUMBER, tr.getTz()));
}
out.accept(new CssToken(CssTokenType.TT_RIGHT_BRACKET));
} else if (tx instanceof Scale ts) {
out.accept(new CssToken(CssTokenType.TT_FUNCTION, "scale"));
out.accept(new CssToken(CssTokenType.TT_NUMBER, ts.getX()));
if (ts.getY() != ts.getX() || ts.getZ() != 1 || ts.getPivotX() != 0 || ts.getPivotY() != 0) {
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_NUMBER, ts.getY()));
}
if (ts.getZ() != 1) {
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_NUMBER, ts.getZ()));
if (ts.getPivotX() != 0 || ts.getPivotY() != 0 || ts.getPivotZ() != 0) {
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_S, " "));
out.accept(new CssToken(CssTokenType.TT_NUMBER, ts.getPivotX()));
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_NUMBER, ts.getPivotY()));
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_NUMBER, ts.getPivotZ()));
}
} else if (ts.getPivotX() != 0 || ts.getPivotY() != 0) {
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_S, " "));
out.accept(new CssToken(CssTokenType.TT_NUMBER, ts.getPivotX()));
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_NUMBER, ts.getPivotY()));
}
out.accept(new CssToken(CssTokenType.TT_RIGHT_BRACKET));
} else if (tx instanceof Rotate tr) {
out.accept(new CssToken(CssTokenType.TT_FUNCTION, "rotate"));
out.accept(new CssToken(CssTokenType.TT_NUMBER, tr.getAngle()));
if (tr.getPivotX() != 0.0 || tr.getPivotY() != 0.0 || tr.getPivotZ() != 0.0
|| !tr.getAxis().equals(Rotate.Z_AXIS)) {
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_S, " "));
out.accept(new CssToken(CssTokenType.TT_NUMBER, tr.getPivotX()));
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_NUMBER, tr.getPivotY()));
}
if (tr.getPivotZ() != 0.0) {
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_NUMBER, tr.getPivotZ()));
}
if (!tr.getAxis().equals(Rotate.Z_AXIS)) {
Point3D a = tr.getAxis();
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_NUMBER, a.getX()));
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_NUMBER, a.getY()));
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_NUMBER, a.getZ()));
}
out.accept(new CssToken(CssTokenType.TT_RIGHT_BRACKET));
} else if (tx instanceof Shear tr) {
out.accept(new CssToken(CssTokenType.TT_FUNCTION, "shear"));
out.accept(new CssToken(CssTokenType.TT_NUMBER, tr.getX()));
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_NUMBER, tr.getY()));
if (tr.getPivotX() != 0.0 || tr.getPivotY() != 0.0) {
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_NUMBER, tr.getPivotX()));
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_NUMBER, tr.getPivotY()));
}
out.accept(new CssToken(CssTokenType.TT_RIGHT_BRACKET));
} else if (tx.isType2D()) {
out.accept(new CssToken(CssTokenType.TT_FUNCTION, "matrix"));
out.accept(new CssToken(CssTokenType.TT_NUMBER, tx.getMxx()));
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_NUMBER, tx.getMyx()));
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_NUMBER, tx.getMxy()));
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_NUMBER, tx.getMyy()));
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_NUMBER, tx.getTx()));
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_NUMBER, tx.getTy()));
out.accept(new CssToken(CssTokenType.TT_RIGHT_BRACKET));
} else {
out.accept(new CssToken(CssTokenType.TT_FUNCTION, "matrix"));
out.accept(new CssToken(CssTokenType.TT_NUMBER, tx.getMxx()));
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_NUMBER, tx.getMyx()));
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_NUMBER, tx.getMzx()));
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_NUMBER, tx.getMxy()));
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_NUMBER, tx.getMyy()));
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_NUMBER, tx.getMzy()));
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_NUMBER, tx.getMxz()));
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_NUMBER, tx.getMyz()));
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_NUMBER, tx.getMzz()));
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_NUMBER, tx.getTx()));
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_NUMBER, tx.getTy()));
out.accept(new CssToken(CssTokenType.TT_COMMA));
out.accept(new CssToken(CssTokenType.TT_NUMBER, tx.getTz()));
out.accept(new CssToken(CssTokenType.TT_RIGHT_BRACKET));
}
}
@Override
public @Nullable String getHelpText() {
return """
Format of ⟨Transform⟩: ⟨Affine⟩｜⟨Translate⟩｜⟨Scale⟩｜⟨Rotate⟩｜⟨Shear⟩｜⟨Matrix⟩
Format of ⟨Affine⟩: affine(⟨xx⟩,⟨xy⟩,⟨tx⟩, ⟨yx⟩,⟨yy⟩,⟨ty⟩)
｜affine(⟨xx⟩,⟨xy⟩,⟨xz⟩,⟨tx⟩, ⟨yx⟩,⟨yy⟩,⟨yz⟩,⟨ty⟩, ⟨zx⟩,⟨zy⟩,⟨zz⟩,⟨tz⟩)
Format of ⟨Translate⟩: translate(⟨tx⟩,⟨ty⟩)
Format of ⟨Scale⟩: scale(⟨sx⟩,⟨sy⟩［,⟨pivotx⟩,⟨pivoty⟩］)
Format of ⟨Rotate⟩: rotate(⟨angle⟩［,⟨pivotx⟩,⟨pivoty⟩］)
Format of ⟨Shear⟩: shear(⟨shx⟩,⟨shy⟩［,⟨pivotx⟩,⟨pivoty⟩］)
| skew(⟨shx⟩,⟨shy⟩［,⟨pivotx⟩,⟨pivoty⟩］)
Format of ⟨Matrix⟩: matrix(⟨xx⟩,⟨yx⟩, ⟨xy⟩,⟨yy⟩, ⟨tx⟩,⟨ty⟩)
｜matrix(⟨xx⟩,⟨yx⟩,⟨zx⟩, ⟨xy⟩,⟨yy⟩,⟨zy⟩, ⟨xz⟩,⟨yz⟩,⟨zz⟩, ⟨tx⟩,⟨zx⟩,⟨tz⟩)"""
;
}
@Override
public Transform parseNonNull(CssTokenizer tt, @Nullable IdResolver idResolver) throws ParseException, IOException {
tt.requireNextToken(CssTokenType.TT_FUNCTION, "⟨Transform⟩: function expected");
String func = tt.currentStringNonNull();
int funcPos = tt.getStartPosition();
List m = new ArrayList<>();
while (tt.next() != ')' && tt.current() != CssTokenType.TT_EOF) {
if (tt.current() != ',') {
tt.pushBack();
}
if (tt.next() != CssTokenType.TT_NUMBER) {
throw new ParseException("coefficient nb " + m.size() + " expected: \"" + tt.currentString() + "\"", tt.getStartPosition());
}
m.add(tt.currentNumberNonNull().doubleValue());
}
if (tt.current() != ')') {
throw new ParseException("')' expected: \"" + tt.currentString() + "\"", tt.getStartPosition());
}
return switch (func) {
case "affine" -> switch (m.size()) {
case 0 -> new Affine(//
1, 0, 0,//
0, 1, 0//
);
case 6 -> new Affine(//
m.get(0), m.get(1), m.get(2),//
m.get(3), m.get(4), m.get(5)//
);
case 12 -> new Affine(//
m.get(0), m.get(1), m.get(2), m.get(3),//
m.get(4), m.get(5), m.get(6), m.get(7),//
m.get(8), m.get(9), m.get(10), m.get(11)//
);
default ->
throw new ParseException("6 or 12 coefficients expected, but found " + m.size(), tt.getStartPosition());
};
case "matrix" -> switch (m.size()) {
case 0 -> new Affine(//
1, 0, 0,//
0, 1, 0//
);
case 6 -> new Affine(//
m.get(0), m.get(2), m.get(4),//
m.get(1), m.get(3), m.get(5)//
);
case 12 -> new Affine(//
m.get(0), m.get(3), m.get(6), m.get(9),//
m.get(1), m.get(4), m.get(7), m.get(10),//
m.get(2), m.get(5), m.get(8), m.get(11)//
);
default ->
throw new ParseException("6 or 12 coefficients expected, but found " + m.size(), tt.getStartPosition());
};
case "skew", "shear" -> switch (m.size()) {
case 0 -> Transform.shear(0, 0);
case 2 -> Transform.shear(m.get(0), m.get(1));
case 4 -> Transform.shear(
m.get(0), m.get(1), m.get(2), m.get(3)//
);
default ->
throw new ParseException("2 or 4 coefficients expected, but found " + m.size(), tt.getStartPosition());
};
case "translate" -> switch (m.size()) {
case 0 -> Transform.translate(//
0, 0//
);//
case 1 -> Transform.translate(
m.get(0), 0//
);
case 2 -> Transform.translate(
m.get(0), m.get(1)//
);
case 3 -> new Translate(
m.get(0), m.get(1), m.get(2)//
);
default ->
throw new ParseException("1, 2 or 3 coefficients expected, but found " + m.size(), tt.getStartPosition());
};
case "scale" -> switch (m.size()) {
case 0 -> Transform.scale(//
1, 1//
);
case 1 -> Transform.scale(//
m.get(0), m.get(0)//
);
case 2 -> Transform.scale(
m.get(0), m.get(1)//
);
case 3 -> new Scale(
m.get(0), m.get(0), m.get(1), m.get(2)//
);
case 4 -> Transform.scale(
m.get(0), m.get(1), m.get(2), m.get(3)//
);
case 6 -> new Scale(
m.get(0), m.get(1), m.get(2),//
m.get(3), m.get(4), m.get(5)//
);
default ->
throw new ParseException("1, 2, 3, 4, or 6 coefficients expected, but found " + m.size(), tt.getStartPosition());
};
case "rotate" -> switch (m.size()) {
case 0 -> Transform.rotate(//
0,//
0, 0//
);
case 1 -> Transform.rotate(//
m.get(0),//
0, 0//
);
case 3 -> Transform.rotate(//
m.get(0),//
m.get(1), m.get(2)//
);
case 4 -> new Rotate(//
m.get(0),//
m.get(1), m.get(2), m.get(3)//
);
case 6 -> new Rotate(//
m.get(0),//
m.get(1), m.get(2), 0,//
new Point3D(m.get(3), m.get(4), m.get(5))//
);
case 7 -> new Rotate(//
m.get(0),//
m.get(1), m.get(2), m.get(3),//
new Point3D(m.get(4), m.get(5), m.get(6))//
);
default ->
throw new ParseException("1, 3, 4, 6 or 7 coefficients expected, but found " + m.size(), tt.getStartPosition());
};
default -> throw new ParseException("unsupported function: \"" + func + "\"", funcPos);
};
}
}