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2002/css-validator/org/w3c/css/properties/css2 CssTextShadow.java,NONE,1.1

From: Yves Lafon via cvs-syncmail <cvsmail@w3.org>
Date: Wed, 29 Aug 2012 10:09:22 +0000
To: www-validator-cvs@w3.org
Message-Id: <E1T6fD8-0002qs-K9@lionel-hutz.w3.org>
Update of /sources/public/2002/css-validator/org/w3c/css/properties/css2
In directory hutz:/tmp/cvs-serv10947/css2

Added Files:
	CssTextShadow.java 
Log Message:
new version of text-shadow per http://www.w3.org/TR/2008/REC-CSS2-20080411/text.html#propdef-text-shadow

--- NEW FILE: CssTextShadow.java ---
// $Id: CssTextShadow.java,v 1.1 2012/08/29 10:09:20 ylafon Exp $
// Author: Yves Lafon <ylafon@w3.org>
//
// (c) COPYRIGHT MIT, ERCIM and Keio University, 2012.
// Please first read the full copyright statement in file COPYRIGHT.html
package org.w3c.css.properties.css2;

import org.w3c.css.util.ApplContext;
import org.w3c.css.util.InvalidParamException;
import org.w3c.css.values.CssExpression;
import org.w3c.css.values.CssLayerList;
import org.w3c.css.values.CssNumber;
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.COMMA;
import static org.w3c.css.values.CssOperator.SPACE;

/**
 * @spec http://www.w3.org/TR/2008/REC-CSS2-20080411/text.html#propdef-text-shadow
 */
public class CssTextShadow extends org.w3c.css.properties.css.CssTextShadow {

	/**
	 * Create a new CssTextShadow
	 */
	public CssTextShadow() {
	}

	/**
	 * Creates a new CssTextShadow
	 *
	 * @param expression The expression for this property
	 * @throws org.w3c.css.util.InvalidParamException
	 *          Expressions are incorrect
	 */
	public CssTextShadow(ApplContext ac, CssExpression expression, boolean check)
			throws InvalidParamException {

		setByUser();
		CssValue val;
		ArrayList<CssValue> values;
		CssExpression singleExpr = null;
		CssValue b_val = null;
		char op;

		values = new ArrayList<CssValue>();
		// we just accumulate values and check at validation
		// unless it's inherit or none.
		while (!expression.end()) {
			val = expression.getValue();
			op = expression.getOperator();

			if (inherit.equals(val)) {
				if (expression.getCount() > 1) {
					throw new InvalidParamException("value", val,
							getPropertyName(), ac);
				}
				value = inherit;
				expression.next();
				return;
			}
			if (none.equals(val)) {
				if (expression.getCount() > 1) {
					throw new InvalidParamException("value", val,
							getPropertyName(), ac);
				}
				value = none;
				expression.next();
				return;
			}
			if (singleExpr == null) {
				singleExpr = new CssExpression();
			}
			// we will check later
			singleExpr.addValue(val);
			singleExpr.setOperator(op);
			expression.next();

			if (!expression.end()) {
				// incomplete value followed by a comma... it's complete!
				if (op == COMMA) {
					singleExpr.setOperator(SPACE);
					b_val = check(ac, singleExpr);
					values.add(b_val);
					singleExpr = null;
				} else if ((op != SPACE)) {
					throw new InvalidParamException("operator",
							((new Character(op)).toString()), ac);
				}
			}
		}
		// if we reach the end in a value that can come in pair
		if (singleExpr != null) {
			b_val = check(ac, singleExpr);
			values.add(b_val);
		}
		if (values.size() == 1) {
			value = values.get(0);
		} else {
			value = new CssLayerList(values);
		}
	}

	public CssValue check(ApplContext ac, CssExpression exp)
			throws InvalidParamException {
		CssValue val;
		CssValue color = null;
		ArrayList<CssValue> values = new ArrayList<CssValue>(4);

		int count = exp.getCount();
		if (count < 2 || count > 4) {
			throw new InvalidParamException("unrecognize", ac);
		}
		while (!exp.end()) {
			val = exp.getValue();
			// color is last, so if we reach this, we are in error
			if (val.getType() == CssTypes.CSS_NUMBER) {
				// case of 0, a number and a length
				val = ((CssNumber) val).getLength();
			}
			if (val.getType() == CssTypes.CSS_LENGTH) {
				values.add(val);
				exp.next();
			} else {
				CssColor c = new CssColor(ac, exp, false);
				color = c.getColor();
				// color can be first or last in CSS2
				if (values.size() > 0 && exp.getRemainingCount() != 0) {
					if (color != null) {
						throw new InvalidParamException("value",
								val, getPropertyName(), ac);
					}
				}
				// no need for exp.next() as CssColor parsing is
				// already doing that.
			}
		}
		int lcount = values.size();
		// sanity check third length if present must not be negative
/*
        This check is not mandated explicitly in the spec, however
        a radius can't be negative so the code will be re-enabled
        if necessary (but it's CSS2...)

        if (lcount == 3) {
			CssLength l = (CssLength) values.get(2);
			if (!l.isPositive()) {
				throw new InvalidParamException("negative-value",
						l, getPropertyName(), ac);
			}
		}
*/
		// sanity check we need two to three length
		if (lcount < 2 || lcount > 3) {
			throw new InvalidParamException("value",
					(new CssValueList(values)).toString(),
					getPropertyName(), ac);
		}
		// add the color if set, create the value and return
		if (color != null) {
			values.add(color);
		}
		return new CssValueList(values);
	}

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

}
Received on Wednesday, 29 August 2012 10:09:34 UTC

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