w3c.css.properties.css3.CssScrollSnapMargin Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of cssvalidator Show documentation
Backend for the W3C CSS Validation Service
There is a newer version: 1.0.8
//
// Author: Yves Lafon 
//
// (c) COPYRIGHT MIT, ERCIM, Keio, Beihang, 2017.
// Please first read the full copyright statement in file COPYRIGHT.html
package org.w3c.css.properties.css3;

import org.w3c.css.parser.CssStyle;
import org.w3c.css.util.ApplContext;
import org.w3c.css.util.InvalidParamException;
import org.w3c.css.values.CssExpression;
import org.w3c.css.values.CssTypes;
import org.w3c.css.values.CssValue;
import org.w3c.css.values.CssValueList;

import java.util.ArrayList;

import static org.w3c.css.values.CssOperator.SPACE;

/**
 * @spec https://www.w3.org/TR/2017/CR-css-scroll-snap-1-20170824/#propdef-scroll-snap-margin
 */
public class CssScrollSnapMargin extends org.w3c.css.properties.css.CssScrollSnapMargin {

    private CssScrollSnapMarginTop _longhand_top;
    private CssScrollSnapMarginBottom _longhand_bottom;
    private CssScrollSnapMarginLeft _longhand_left;
    private CssScrollSnapMarginRight _longhand_right;

    /**
     * Create a new CssScrollSnapMarginInline
     */
    public CssScrollSnapMargin() {
        value = initial;
        _longhand_bottom = new CssScrollSnapMarginBottom();
        _longhand_left = new CssScrollSnapMarginLeft();
        _longhand_right = new CssScrollSnapMarginRight();
        _longhand_top = new CssScrollSnapMarginTop();
    }

    /**
     * Creates a new CssScrollSnapMarginInline
     *
     * @param expression The expression for this property
     * @throws org.w3c.css.util.InvalidParamException
     *          Expressions are incorrect
     */
    public CssScrollSnapMargin(ApplContext ac, CssExpression expression, boolean check)
            throws InvalidParamException {
        setByUser();
        CssValue val;
        char op;

        if (check && expression.getCount() > 4) {
            throw new InvalidParamException("unrecognize", ac);
        }
        ArrayList values = new ArrayList<>();
        _longhand_bottom = new CssScrollSnapMarginBottom();
        _longhand_left = new CssScrollSnapMarginLeft();
        _longhand_right = new CssScrollSnapMarginRight();
        _longhand_top = new CssScrollSnapMarginTop();

        for (int i = 0; i < 4 && !expression.end(); i++) {
            val = expression.getValue();
            op = expression.getOperator();

            switch (val.getType()) {
                case CssTypes.CSS_NUMBER:
                    val.getCheckableValue().checkEqualsZero(ac, this);
                case CssTypes.CSS_LENGTH:
                    values.add(val);
                    switch (i) {
                        case 0:
                            _longhand_top.value = val;
                            break;
                        case 1:
                            _longhand_right.value = val;
                            break;
                        case 2:
                            _longhand_bottom.value = val;
                            break;
                        case 3:
                            _longhand_left.value = val;
                            break;
                        default:
                            // can't happen by design
                    }
                    break;
                case CssTypes.CSS_IDENT:
                    if (inherit.equals(val)) {
                        if (expression.getCount() > 1) {
                            throw new InvalidParamException("value",
                                    expression.getValue(),
                                    getPropertyName(), ac);
                        }
                        values.add(val);
                        _longhand_top.value = inherit;
                        _longhand_right.value = inherit;
                        _longhand_bottom.value = inherit;
                        _longhand_left.value = inherit;
                        break;
                    }
                default:
                    throw new InvalidParamException("value",
                            expression.getValue(),
                            getPropertyName(), ac);
            }
            if (op != SPACE) {
                throw new InvalidParamException("operator", op,
                        getPropertyName(), ac);
            }
            expression.next();
        }
        value = (values.size() == 1) ? values.get(0) : new CssValueList(values);
    }

    public CssScrollSnapMargin(ApplContext ac, CssExpression expression)
            throws InvalidParamException {
        this(ac, expression, false);
    }

    /**
     * Add this property to the CssStyle.
     *
     * @param style The CssStyle
     */
    public void addToStyle(ApplContext ac, CssStyle style) {
        super.addToStyle(ac, style);
        _longhand_top.addToStyle(ac, style);
        _longhand_right.addToStyle(ac, style);
        _longhand_bottom.addToStyle(ac, style);
        _longhand_left.addToStyle(ac, style);

    }
}