@Nonnull
private CSSSelectorAttribute _createSelectorAttribute(@Nonnull final CSSNode aNode) {
_expectNodeType(aNode, ECSSNodeType.ATTRIB);
final int nChildren = aNode.jjtGetNumChildren();
// Check if a namespace prefix is present
String sNamespacePrefix = null;
int nOperatorIndex = 0;
if (nChildren > 0 && ECSSNodeType.NAMESPACEPREFIX.isNode(aNode.jjtGetChild(0), m_eVersion)) {
sNamespacePrefix = aNode.jjtGetChild(0).getText();
nOperatorIndex = 1;
}
final String sAttrName = aNode.getText();
CSSSelectorAttribute ret;
if (nChildren == nOperatorIndex) {
// Just check for existence of the attribute
ret = new CSSSelectorAttribute(sNamespacePrefix, sAttrName);
} else {
final int nExpectedChildCount = nOperatorIndex + 2;
if (nChildren != nExpectedChildCount)
_throwUnexpectedChildrenCount(
aNode,
"Illegal number of children present ("
+ nChildren
+ ") - expected "
+ nExpectedChildCount);
// With operator...
final CSSNode aOperator = aNode.jjtGetChild(nOperatorIndex);
_expectNodeType(aOperator, ECSSNodeType.ATTRIBOPERATOR);
// ...and value
final CSSNode aAttrValue = aNode.jjtGetChild(nOperatorIndex + 1);
_expectNodeType(aAttrValue, ECSSNodeType.ATTRIBVALUE);
ret =
new CSSSelectorAttribute(
sNamespacePrefix,
sAttrName,
ECSSAttributeOperator.getFromNameOrNull(aOperator.getText()),
aAttrValue.getText());
}
ret.setSourceLocation(aNode.getSourceLocation());
return ret;
}
@Nullable
private ICSSSelectorMember _createSelectorMember(final CSSNode aNode) {
final int nChildCount = aNode.jjtGetNumChildren();
if (ECSSNodeType.NAMESPACEPREFIX.isNode(aNode, m_eVersion)
|| ECSSNodeType.ELEMENTNAME.isNode(aNode, m_eVersion)
|| ECSSNodeType.HASH.isNode(aNode, m_eVersion)
|| ECSSNodeType.CLASS.isNode(aNode, m_eVersion)) {
if (nChildCount != 0)
_throwUnexpectedChildrenCount(
aNode, "CSS simple selector member expected 0 children and got " + nChildCount);
final CSSSelectorSimpleMember ret = new CSSSelectorSimpleMember(aNode.getText());
ret.setSourceLocation(aNode.getSourceLocation());
return ret;
}
if (ECSSNodeType.ATTRIB.isNode(aNode, m_eVersion)) return _createSelectorAttribute(aNode);
if (ECSSNodeType.SELECTORCOMBINATOR.isNode(aNode, m_eVersion)) {
final String sText = aNode.getText();
final ECSSSelectorCombinator eCombinator = ECSSSelectorCombinator.getFromNameOrNull(sText);
if (eCombinator == null)
s_aLogger.error("Failed to parse CSS selector combinator '" + sText + "'");
return eCombinator;
}
if (ECSSNodeType.NEGATION.isNode(aNode, m_eVersion)) {
// Note: no children don't make sense but are syntactically allowed!
final List<CSSSelector> aNestedSelectors = new ArrayList<CSSSelector>();
for (int i = 0; i < nChildCount; ++i) {
final CSSNode aChildNode = aNode.jjtGetChild(0);
final CSSSelector aSelector = _createSelector(aChildNode);
aNestedSelectors.add(aSelector);
}
final CSSSelectorMemberNot ret = new CSSSelectorMemberNot(aNestedSelectors);
ret.setSourceLocation(aNode.getSourceLocation());
return ret;
}
if (ECSSNodeType.PSEUDO.isNode(aNode, m_eVersion)) {
if (nChildCount == 0) {
// E.g. ":focus" or ":hover"
final CSSSelectorSimpleMember ret = new CSSSelectorSimpleMember(aNode.getText());
ret.setSourceLocation(aNode.getSourceLocation());
return ret;
}
if (nChildCount == 1) {
final CSSNode aChildNode = aNode.jjtGetChild(0);
if (ECSSNodeType.NTH.isNode(aChildNode, m_eVersion)) {
// Handle nth. E.g. ":nth-child(even)" or ":nth-child(3n+1)"
final CSSSelectorSimpleMember ret =
new CSSSelectorSimpleMember(aNode.getText() + aChildNode.getText() + ")");
ret.setSourceLocation(aNode.getSourceLocation());
return ret;
}
// It's a function (e.g. ":lang(fr)")
final CSSExpression aExpr = _createExpression(aChildNode);
final CSSSelectorMemberFunctionLike ret =
new CSSSelectorMemberFunctionLike(aNode.getText(), aExpr);
ret.setSourceLocation(aNode.getSourceLocation());
return ret;
}
throw new UnsupportedOperationException(
"Not supporting pseudo-selectors with functions and "
+ nChildCount
+ " args: "
+ aNode.toString());
}
s_aLogger.error("Unsupported selector child: " + ECSSNodeType.getNodeName(aNode, m_eVersion));
return null;
}