nsresult txPatternParser::createStepPattern(txExprLexer& aLexer,
txIParseContext* aContext,
txPattern*& aPattern)
{
nsresult rv = NS_OK;
bool isAttr = false;
Token* tok = aLexer.peek();
if (tok->mType == Token::AXIS_IDENTIFIER) {
if (TX_StringEqualsAtom(tok->Value(), nsGkAtoms::attribute)) {
isAttr = true;
}
else if (!TX_StringEqualsAtom(tok->Value(), nsGkAtoms::child)) {
// all done already for CHILD_AXIS, for all others
// XXX report unexpected axis error
return NS_ERROR_XPATH_PARSE_FAILURE;
}
aLexer.nextToken();
}
else if (tok->mType == Token::AT_SIGN) {
aLexer.nextToken();
isAttr = true;
}
txNodeTest* nodeTest;
if (aLexer.peek()->mType == Token::CNAME) {
tok = aLexer.nextToken();
// resolve QName
RefPtr<nsAtom> prefix, lName;
int32_t nspace;
rv = resolveQName(tok->Value(), getter_AddRefs(prefix), aContext,
getter_AddRefs(lName), nspace, true);
if (NS_FAILED(rv)) {
// XXX error report namespace resolve failed
return rv;
}
uint16_t nodeType = isAttr ?
(uint16_t)txXPathNodeType::ATTRIBUTE_NODE :
(uint16_t)txXPathNodeType::ELEMENT_NODE;
nodeTest = new txNameTest(prefix, lName, nspace, nodeType);
}
else {
rv = createNodeTypeTest(aLexer, &nodeTest);
NS_ENSURE_SUCCESS(rv, rv);
}
nsAutoPtr<txStepPattern> step(new txStepPattern(nodeTest, isAttr));
rv = parsePredicates(step, aLexer, aContext);
NS_ENSURE_SUCCESS(rv, rv);
aPattern = step.forget();
return NS_OK;
}
nsresult txPatternParser::createStepPattern(txExprLexer& aLexer,
txIParseContext* aContext,
txPattern*& aPattern)
{
nsresult rv = NS_OK;
MBool isAttr = MB_FALSE;
Token* tok = aLexer.peek();
if (tok->mType == Token::AXIS_IDENTIFIER) {
if (TX_StringEqualsAtom(tok->Value(), txXPathAtoms::attribute)) {
isAttr = MB_TRUE;
}
else if (!TX_StringEqualsAtom(tok->Value(), txXPathAtoms::child)) {
// all done already for CHILD_AXIS, for all others
// XXX report unexpected axis error
return NS_ERROR_XPATH_PARSE_FAILURE;
}
aLexer.nextToken();
}
else if (tok->mType == Token::AT_SIGN) {
aLexer.nextToken();
isAttr = MB_TRUE;
}
tok = aLexer.nextToken();
txNodeTest* nodeTest;
if (tok->mType == Token::CNAME) {
// resolve QName
nsCOMPtr<nsIAtom> prefix, lName;
PRInt32 nspace;
rv = resolveQName(tok->Value(), getter_AddRefs(prefix), aContext,
getter_AddRefs(lName), nspace, PR_TRUE);
if (NS_FAILED(rv)) {
// XXX error report namespace resolve failed
return rv;
}
PRUint16 nodeType = isAttr ?
(PRUint16)txXPathNodeType::ATTRIBUTE_NODE :
(PRUint16)txXPathNodeType::ELEMENT_NODE;
nodeTest = new txNameTest(prefix, lName, nspace, nodeType);
if (!nodeTest) {
return NS_ERROR_OUT_OF_MEMORY;
}
}
else {
aLexer.pushBack();
rv = createNodeTypeTest(aLexer, &nodeTest);
NS_ENSURE_SUCCESS(rv, rv);
}
nsAutoPtr<txStepPattern> step(new txStepPattern(nodeTest, isAttr));
if (!step) {
delete nodeTest;
return NS_ERROR_OUT_OF_MEMORY;
}
rv = parsePredicates(step, aLexer, aContext);
NS_ENSURE_SUCCESS(rv, rv);
aPattern = step.forget();
return NS_OK;
}
nsresult
txExprParser::createLocationStep(txExprLexer& lexer, txIParseContext* aContext,
Expr** aExpr)
{
*aExpr = nullptr;
//-- child axis is default
LocationStep::LocationStepType axisIdentifier = LocationStep::CHILD_AXIS;
nsAutoPtr<txNodeTest> nodeTest;
//-- get Axis Identifier or AbbreviatedStep, if present
Token* tok = lexer.peek();
switch (tok->mType) {
case Token::AXIS_IDENTIFIER:
{
//-- eat token
lexer.nextToken();
nsCOMPtr<nsIAtom> axis = do_GetAtom(tok->Value());
if (axis == nsGkAtoms::ancestor) {
axisIdentifier = LocationStep::ANCESTOR_AXIS;
}
else if (axis == nsGkAtoms::ancestorOrSelf) {
axisIdentifier = LocationStep::ANCESTOR_OR_SELF_AXIS;
}
else if (axis == nsGkAtoms::attribute) {
axisIdentifier = LocationStep::ATTRIBUTE_AXIS;
}
else if (axis == nsGkAtoms::child) {
axisIdentifier = LocationStep::CHILD_AXIS;
}
else if (axis == nsGkAtoms::descendant) {
axisIdentifier = LocationStep::DESCENDANT_AXIS;
}
else if (axis == nsGkAtoms::descendantOrSelf) {
axisIdentifier = LocationStep::DESCENDANT_OR_SELF_AXIS;
}
else if (axis == nsGkAtoms::following) {
axisIdentifier = LocationStep::FOLLOWING_AXIS;
}
else if (axis == nsGkAtoms::followingSibling) {
axisIdentifier = LocationStep::FOLLOWING_SIBLING_AXIS;
}
else if (axis == nsGkAtoms::_namespace) {
axisIdentifier = LocationStep::NAMESPACE_AXIS;
}
else if (axis == nsGkAtoms::parent) {
axisIdentifier = LocationStep::PARENT_AXIS;
}
else if (axis == nsGkAtoms::preceding) {
axisIdentifier = LocationStep::PRECEDING_AXIS;
}
else if (axis == nsGkAtoms::precedingSibling) {
axisIdentifier = LocationStep::PRECEDING_SIBLING_AXIS;
}
else if (axis == nsGkAtoms::self) {
axisIdentifier = LocationStep::SELF_AXIS;
}
else {
return NS_ERROR_XPATH_INVALID_AXIS;
}
break;
}
case Token::AT_SIGN:
//-- eat token
lexer.nextToken();
axisIdentifier = LocationStep::ATTRIBUTE_AXIS;
break;
case Token::PARENT_NODE :
//-- eat token
lexer.nextToken();
axisIdentifier = LocationStep::PARENT_AXIS;
nodeTest = new txNodeTypeTest(txNodeTypeTest::NODE_TYPE);
break;
case Token::SELF_NODE :
//-- eat token
lexer.nextToken();
axisIdentifier = LocationStep::SELF_AXIS;
nodeTest = new txNodeTypeTest(txNodeTypeTest::NODE_TYPE);
break;
default:
break;
}
//-- get NodeTest unless an AbbreviatedStep was found
nsresult rv = NS_OK;
if (!nodeTest) {
tok = lexer.peek();
if (tok->mType == Token::CNAME) {
lexer.nextToken();
// resolve QName
nsCOMPtr<nsIAtom> prefix, lName;
int32_t nspace;
rv = resolveQName(tok->Value(), getter_AddRefs(prefix),
aContext, getter_AddRefs(lName),
nspace, true);
NS_ENSURE_SUCCESS(rv, rv);
nodeTest =
new txNameTest(prefix, lName, nspace,
axisIdentifier == LocationStep::ATTRIBUTE_AXIS ?
static_cast<uint16_t>(txXPathNodeType::ATTRIBUTE_NODE) :
static_cast<uint16_t>(txXPathNodeType::ELEMENT_NODE));
}
else {
rv = createNodeTypeTest(lexer, getter_Transfers(nodeTest));
NS_ENSURE_SUCCESS(rv, rv);
}
}
nsAutoPtr<LocationStep> lstep(new LocationStep(nodeTest, axisIdentifier));
nodeTest.forget();
//-- handle predicates
rv = parsePredicates(lstep, lexer, aContext);
NS_ENSURE_SUCCESS(rv, rv);
*aExpr = lstep.forget();
return NS_OK;
}
