w3c.css.properties.css21.CssContent Maven / Gradle / Ivy
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Backend for the W3C CSS Validation Service
//
// Author: Yves Lafon
//
// (c) COPYRIGHT MIT, ERCIM, Keio, Beihang, 2016.
// Please first read the full copyright statement in file COPYRIGHT.html
package org.w3c.css.properties.css21;
import org.w3c.css.properties.css.CssProperty;
import org.w3c.css.util.ApplContext;
import org.w3c.css.util.InvalidParamException;
import org.w3c.css.values.CssExpression;
import org.w3c.css.values.CssFunction;
import org.w3c.css.values.CssIdent;
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 https://www.w3.org/TR/2011/REC-CSS2-20110607/generate.html#content
*/
public class CssContent extends org.w3c.css.properties.css.CssContent {
private static CssIdent normal = CssIdent.getIdent("normal");
protected static CssIdent[] allowed_values;
static {
String[] _allowed_values = {"open-quote", "close-quote", "no-open-quote", "no-close-quote"};
int i = 0;
allowed_values = new CssIdent[_allowed_values.length];
for (String s : _allowed_values) {
allowed_values[i++] = CssIdent.getIdent(s);
}
}
public static CssIdent getMatchingIdent(CssIdent ident) {
for (CssIdent id : allowed_values) {
if (id.equals(ident)) {
return id;
}
}
return null;
}
/**
* Create a new CssContent
*/
public CssContent() {
}
/**
* Creates a new CssContent
*
* @param expression The expression for this property
* @throws org.w3c.css.util.InvalidParamException
* Expressions are incorrect
*/
public CssContent(ApplContext ac, CssExpression expression, boolean check)
throws InvalidParamException {
ArrayList values;
setByUser();
values = new ArrayList<>();
CssValue val;
char op;
while (!expression.end()) {
val = expression.getValue();
op = expression.getOperator();
switch (val.getType()) {
case CssTypes.CSS_STRING:
case CssTypes.CSS_URL:
values.add(val);
break;
case CssTypes.CSS_FUNCTION:
checkCounterFunction(ac, this, val);
values.add(val);
break;
case CssTypes.CSS_IDENT:
if (inherit.equals(val)) {
values.add(inherit);
if (expression.getCount() > 1) {
throw new InvalidParamException("unrecognize", ac);
}
break;
}
if (normal.equals(val)) {
values.add(normal);
if (expression.getCount() > 1) {
throw new InvalidParamException("unrecognize", ac);
}
break;
}
if (none.equals(val)) {
values.add(none);
if (expression.getCount() > 1) {
throw new InvalidParamException("unrecognize", ac);
}
break;
}
value = getMatchingIdent((CssIdent) val);
if (value != null) {
values.add(val);
break;
}
// if not recognized... it can be a color.
default:
throw new InvalidParamException("value",
expression.getValue(),
getPropertyName(), ac);
}
if ((op != SPACE)) {
throw new InvalidParamException("operator",
((new Character(op)).toString()), ac);
}
expression.next();
}
value = (values.size() == 1) ? values.get(0) : new CssValueList(values);
}
// check the value of counter and counters function
// per https://www.w3.org/TR/2011/REC-CSS2-20110607/syndata.html#value-def-counter
protected static void checkCounterFunction(ApplContext ac,
CssProperty property,
CssValue function)
throws InvalidParamException {
CssExpression exp;
char op;
CssValue v;
CssFunction f = (CssFunction) function;
switch (f.getName()) {
case "counter":
exp = f.getParameters();
// must be counter(name [,style?])
if (exp.getCount() > 2) {
throw new InvalidParamException("unrecognize", ac);
}
v = exp.getValue();
op = exp.getOperator();
if (v.getType() != CssTypes.CSS_IDENT) {
throw new InvalidParamException("value", v,
property.getPropertyName(), ac);
}
exp.next();
if (!exp.end()) {
// we have another item, it must be an ident matching list-style-type.
if (op != COMMA) {
throw new InvalidParamException("operator",
((new Character(op)).toString()), ac);
}
v = exp.getValue();
if (v.getType() == CssTypes.CSS_IDENT) {
if (null == CssListStyleType.getAllowedIdent((CssIdent) v)) {
throw new InvalidParamException("value", v,
property.getPropertyName(), ac);
}
}
}
break;
case "counters":
exp = f.getParameters();
// must be counter(name string[,style?])
if (exp.getCount() < 2 || exp.getCount() > 3) {
throw new InvalidParamException("unrecognize", ac);
}
v = exp.getValue();
op = exp.getOperator();
if (v.getType() != CssTypes.CSS_IDENT) {
throw new InvalidParamException("value", v,
property.getPropertyName(), ac);
}
exp.next();
if (op != COMMA) {
throw new InvalidParamException("operator",
((new Character(op)).toString()), ac);
}
v = exp.getValue();
op = exp.getOperator();
if (v.getType() != CssTypes.CSS_STRING) {
throw new InvalidParamException("value", v,
property.getPropertyName(), ac);
}
exp.next();
if (!exp.end()) {
// we have another item, it must be an ident matching list-style-type.
if (op != COMMA) {
throw new InvalidParamException("operator",
((new Character(op)).toString()), ac);
}
v = exp.getValue();
if (v.getType() == CssTypes.CSS_IDENT) {
if (null == CssListStyleType.getAllowedIdent((CssIdent) v)) {
throw new InvalidParamException("value", v,
property.getPropertyName(), ac);
}
}
}
break;
default:
throw new InvalidParamException("value", function,
property.getPropertyName(), ac);
}
}
public CssContent(ApplContext ac, CssExpression expression)
throws InvalidParamException {
this(ac, expression, false);
}
}
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