w3c.css.properties.svg.CssClipPath Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of cssvalidator Show documentation
Show all versions of cssvalidator Show documentation
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.svg;
import org.w3c.css.properties.css.CssProperty;
import org.w3c.css.properties.css3.CssBackgroundClip;
import org.w3c.css.properties.css3.CssBackgroundPosition;
import org.w3c.css.properties.css3.CssBorderRadius;
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/2014/CR-css-masking-1-20140826/#the-clip-path
* @spec https://www.w3.org/TR/2014/CR-css-shapes-1-20140320/#basic-shape-functions
* NOTE that ultimately, all function parsing should be moved to a specific directory
*/
public class CssClipPath extends org.w3c.css.properties.css.CssClipPath {
public static final CssIdent[] geometry_box_allowed_values;
public static final CssIdent[] shape_radius_allowed_values;
public static final CssIdent inset_round;
public static final CssIdent at_position;
static {
String[] _allowed_values = {"margin-box", "fill-box", "stroke-box", "view-box"};
geometry_box_allowed_values = new CssIdent[_allowed_values.length];
for (int i = 0; i < geometry_box_allowed_values.length; i++) {
geometry_box_allowed_values[i] = CssIdent.getIdent(_allowed_values[i]);
}
String[] _shape_radius_values = {"closest-side", "farthest-side"};
shape_radius_allowed_values = new CssIdent[_shape_radius_values.length];
for (int i = 0; i < _shape_radius_values.length; i++) {
shape_radius_allowed_values[i] = CssIdent.getIdent(_shape_radius_values[i]);
}
inset_round = CssIdent.getIdent("round");
at_position = CssIdent.getIdent("at");
}
public static final CssIdent getGeometryBoxAllowedValue(CssIdent ident) {
// = | fill-box | stroke-box | view-box
// = | margin-box
CssIdent idt = CssBackgroundClip.getMatchingIdent(ident);
if (idt != null) {
return idt;
}
for (CssIdent id : geometry_box_allowed_values) {
if (id.equals(ident)) {
return id;
}
}
return null;
}
public static final CssIdent getShapeRadiusAllowedValue(CssIdent ident) {
for (CssIdent id : shape_radius_allowed_values) {
if (id.equals(ident)) {
return id;
}
}
return null;
}
/**
* Create a new CssClipPath
*/
public CssClipPath() {
value = initial;
}
/**
* Creates a new CssClipPath
*
* @param expression The expression for this property
* @throws org.w3c.css.util.InvalidParamException
* Expressions are incorrect
*/
public CssClipPath(ApplContext ac, CssExpression expression, boolean check)
throws InvalidParamException {
if (check && expression.getCount() > 1) {
throw new InvalidParamException("unrecognize", ac);
}
setByUser();
ArrayList values = new ArrayList();
boolean gotGeometryBox = false;
boolean gotBasicShape = false;
while (!expression.end()) {
CssValue val;
char op = expression.getOperator();
val = expression.getValue();
switch (val.getType()) {
case CssTypes.CSS_FUNCTION:
if (!gotBasicShape) {
CssFunction func = (CssFunction) val;
String funcname = func.getName().toLowerCase();
switch (funcname) {
case "inset":
checkInsetFunction(ac, func.getParameters(), this);
break;
case "circle":
checkCircleFunction(ac, func.getParameters(), this);
break;
case "ellipse":
checkEllipseFunction(ac, func.getParameters(), this);
break;
case "polygon":
checkPolygonFunction(ac, func.getParameters(), this);
break;
default:
throw new InvalidParamException("value", val,
getPropertyName(), ac);
}
gotBasicShape = true;
values.add(val);
break;
}
throw new InvalidParamException("value", val,
getPropertyName(), ac);
case CssTypes.CSS_URL:
value = val;
break;
case CssTypes.CSS_IDENT:
if (inherit.equals(val)) {
value = inherit;
break;
}
if (none.equals(val)) {
value = none;
break;
}
if (!gotGeometryBox) {
CssIdent ident = getGeometryBoxAllowedValue((CssIdent) val);
if (ident != null) {
gotGeometryBox = true;
values.add(ident);
break;
}
}
default:
throw new InvalidParamException("value",
val.toString(),
getPropertyName(), ac);
}
expression.next();
if (op != SPACE) {
throw new InvalidParamException("operator",
((new Character(op)).toString()), ac);
}
}
if (gotBasicShape || gotGeometryBox) {
value = (values.size() == 1) ? values.get(0) : new CssValueList(values);
}
}
public CssClipPath(ApplContext ac, CssExpression expression)
throws InvalidParamException {
this(ac, expression, false);
}
protected static void checkInsetFunction(ApplContext ac, CssExpression expression,
CssProperty caller) throws InvalidParamException {
CssValue val;
char op;
int nb_shape_arg = 0;
while (!expression.end()) {
val = expression.getValue();
op = expression.getOperator();
switch (val.getType()) {
case CssTypes.CSS_NUMBER:
val.getCheckableValue().checkEqualsZero(ac, caller);
case CssTypes.CSS_LENGTH:
case CssTypes.CSS_PERCENTAGE:
nb_shape_arg++;
if (nb_shape_arg > 4) {
throw new InvalidParamException("unrecognize", ac);
}
break;
case CssTypes.CSS_IDENT:
if (inset_round.equals((CssIdent) val)) {
// the remainder must be a border-radius
CssExpression nex = new CssExpression();
expression.next();
while (!expression.end()) {
nex.addValue(expression.getValue());
nex.setOperator(expression.getOperator());
expression.next();
}
if (nex.getCount() == 0) {
throw new InvalidParamException("unrecognize", ac);
}
CssBorderRadius.checkBorderCornerRadius(ac, caller, nex, true);
break;
}
default:
throw new InvalidParamException("value",
val.toString(),
caller.getPropertyName(), ac);
}
if (op != SPACE) {
throw new InvalidParamException("operator",
((new Character(op)).toString()), ac);
}
expression.next();
}
}
protected static void checkCircleFunction(ApplContext ac, CssExpression expression,
CssProperty caller) throws InvalidParamException {
CssValue val;
char op;
boolean gotRadius = false;
if (expression == null || expression.getCount() == 0) {
// no expression allowed by grammar
return;
}
while (!expression.end()) {
val = expression.getValue();
op = expression.getOperator();
switch (val.getType()) {
case CssTypes.CSS_NUMBER:
val.getCheckableValue().checkEqualsZero(ac, caller);
case CssTypes.CSS_LENGTH:
case CssTypes.CSS_PERCENTAGE:
if (gotRadius) {
throw new InvalidParamException("unrecognize", ac);
}
val.getCheckableValue().checkPositiveness(ac, caller);
gotRadius = true;
break;
case CssTypes.CSS_IDENT:
CssIdent ident = (CssIdent) val;
CssIdent id = getShapeRadiusAllowedValue(ident);
if (id != null) {
if (gotRadius) {
throw new InvalidParamException("unrecognize", ac);
}
gotRadius = true;
break;
}
if (at_position.equals(ident)) {
// the remainder must be a position
CssExpression nex = new CssExpression();
expression.next();
while (!expression.end()) {
nex.addValue(expression.getValue());
nex.setOperator(expression.getOperator());
expression.next();
}
if (nex.getCount() == 0) {
throw new InvalidParamException("unrecognize", ac);
}
CssBackgroundPosition.checkSyntax(nex, ac, caller.getPropertyName());
break;
}
default:
throw new InvalidParamException("value",
val.toString(),
caller.getPropertyName(), ac);
}
if (op != SPACE) {
throw new InvalidParamException("operator",
((new Character(op)).toString()), ac);
}
expression.next();
}
}
protected static void checkEllipseFunction(ApplContext ac, CssExpression expression,
CssProperty caller) throws InvalidParamException {
CssValue val;
char op;
int nbRadius = 0;
if (expression == null || expression.getCount() == 0) {
// no expression allowed by grammar
return;
}
while (!expression.end()) {
val = expression.getValue();
op = expression.getOperator();
switch (val.getType()) {
case CssTypes.CSS_NUMBER:
val.getCheckableValue().checkEqualsZero(ac, caller);
case CssTypes.CSS_LENGTH:
case CssTypes.CSS_PERCENTAGE:
if (nbRadius >= 2) {
throw new InvalidParamException("unrecognize", ac);
}
val.getCheckableValue().checkPositiveness(ac, caller);
nbRadius++;
break;
case CssTypes.CSS_IDENT:
CssIdent ident = (CssIdent) val;
CssIdent id = getShapeRadiusAllowedValue(ident);
if (id != null) {
if (nbRadius >= 2) {
throw new InvalidParamException("unrecognize", ac);
}
nbRadius++;
break;
}
if (at_position.equals(ident)) {
// the remainder must be a position
CssExpression nex = new CssExpression();
expression.next();
while (!expression.end()) {
nex.addValue(expression.getValue());
nex.setOperator(expression.getOperator());
expression.next();
}
if (nex.getCount() == 0) {
throw new InvalidParamException("unrecognize", ac);
}
CssBackgroundPosition.checkSyntax(nex, ac, caller.getPropertyName());
break;
}
default:
throw new InvalidParamException("value",
val.toString(),
caller.getPropertyName(), ac);
}
if (op != SPACE) {
throw new InvalidParamException("operator",
((new Character(op)).toString()), ac);
}
expression.next();
}
}
protected static void checkPolygonFunction(ApplContext ac, CssExpression expression,
CssProperty caller) throws InvalidParamException {
CssValue val;
char op;
int nbShapeArgs = 0;
int nbPoints = 0;
boolean gotFillRule = false;
if (expression == null || expression.getCount() == 0) {
throw new InvalidParamException("unrecognize", ac);
}
while (!expression.end()) {
val = expression.getValue();
op = expression.getOperator();
switch (val.getType()) {
case CssTypes.CSS_NUMBER:
val.getCheckableValue().checkEqualsZero(ac, caller);
case CssTypes.CSS_LENGTH:
case CssTypes.CSS_PERCENTAGE:
if (nbShapeArgs >= 2) {
throw new InvalidParamException("unrecognize", ac);
}
nbShapeArgs++;
break;
case CssTypes.CSS_IDENT:
// can only happen at the beginning.
if (!gotFillRule && nbPoints == 0 && nbShapeArgs == 0) {
CssIdent ident = (CssIdent) val;
CssIdent id = CssFillRule.getAllowedIdent(ident);
if (id != null) {
gotFillRule = true;
break;
}
}
default:
throw new InvalidParamException("value",
val.toString(),
caller.getPropertyName(), ac);
}
// we need a COMMA after a possible fill-rule, and after two shape-args
if (gotFillRule && nbPoints == 0 && nbShapeArgs == 0) {
if (op != COMMA) {
throw new InvalidParamException("operator",
((new Character(op)).toString()), ac);
}
} else if (nbShapeArgs == 2) {
if (expression.getRemainingCount() > 1) {
// we don't need a COMMA at the end, so we check only before.
if (op != COMMA) {
throw new InvalidParamException("operator",
((new Character(op)).toString()), ac);
}
}
nbPoints++;
nbShapeArgs = 0;
} else {
if (op != SPACE) {
throw new InvalidParamException("operator",
((new Character(op)).toString()), ac);
}
}
expression.next();
}
// we always needs two shape args, can't finish with only one
if (nbShapeArgs == 1) {
throw new InvalidParamException("unrecognize", ac);
}
}
}
© 2015 - 2025 Weber Informatics LLC | Privacy Policy