cz.vutbr.web.csskit.fn.CubicBezierImpl Maven / Gradle / Ivy

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jStyleParser is a CSS parser written in Java. It has its own application interface that is designed to allow an efficient CSS processing in Java and mapping the values to the Java data types. It parses CSS 2.1 style sheets into structures that can be efficiently assigned to DOM elements. It is intended be the primary CSS parser for the CSSBox library. While handling errors, it is user agent conforming according to the CSS specification.

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/*
 */
package cz.vutbr.web.csskit.fn;

import cz.vutbr.web.css.Term;
import cz.vutbr.web.css.TermFunction;
import cz.vutbr.web.css.TermList;
import cz.vutbr.web.css.TermNumber;
import cz.vutbr.web.csskit.TermFunctionImpl;
import java.util.List;

/**
 *
 * @author Petr Mikulík
 */
public class CubicBezierImpl extends TermFunctionImpl implements TermFunction.CubicBezier {

    private final float[] _values = new float[4];

    public CubicBezierImpl() {
        setValid(false);
    }

    @Override
    public TermList setValue(List> value) {
        super.setValue(value);
        List>> args = getSeparatedArgs(DEFAULT_ARG_SEP);
        if (args != null) {
            if (args.size() == 4) {
                if (setValues(args)) {
                    setValid(true);
                }
            }
        }
        return this;
    }

    @Override
    public float getX1() {
        return _values[0];
    }

    @Override
    public float getY1() {
        return _values[1];
    }

    @Override
    public float getX2() {
        return _values[2];
    }

    @Override
    public float getY2() {
        return _values[3];
    }

    private boolean setValues(List>> args) {
        for (int i = 0; i < args.size(); i++) {
            if (!setValueAt(i, args.get(i))) {
                return false;
            }
        }
        return true;
    }

    private boolean setValueAt(int index, List> argTerms) {
        if (argTerms.size() == 1) {
            Term t = argTerms.get(0);
            if (t instanceof TermNumber) {
                float value = ((TermNumber) t).getValue();
                if (index == 1
                        || index == 3
                        || value >= 0 && value <= 1) {
                    _values[index] = value;
                    return true;
                }
            }
        }
        return false;
    }

}