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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "txExpr.h"
#include "nsIAtom.h"
#include "txIXPathContext.h"
#include "txNodeSet.h"
/**
* This class represents a FunctionCall as defined by the XSL Working Draft
**/
//------------------/
//- Public Methods -/
//------------------/
/*
* Evaluates the given Expression and converts its result to a number.
*/
// static
nsresult
FunctionCall::evaluateToNumber(Expr* aExpr, txIEvalContext* aContext,
double* aResult)
{
NS_ASSERTION(aExpr, "missing expression");
RefPtr<txAExprResult> exprResult;
nsresult rv = aExpr->evaluate(aContext, getter_AddRefs(exprResult));
NS_ENSURE_SUCCESS(rv, rv);
*aResult = exprResult->numberValue();
return NS_OK;
}
/*
* Evaluates the given Expression and converts its result to a NodeSet.
* If the result is not a NodeSet nullptr is returned.
*/
nsresult
FunctionCall::evaluateToNodeSet(Expr* aExpr, txIEvalContext* aContext,
txNodeSet** aResult)
{
NS_ASSERTION(aExpr, "Missing expression to evaluate");
*aResult = nullptr;
RefPtr<txAExprResult> exprRes;
nsresult rv = aExpr->evaluate(aContext, getter_AddRefs(exprRes));
NS_ENSURE_SUCCESS(rv, rv);
if (exprRes->getResultType() != txAExprResult::NODESET) {
aContext->receiveError(NS_LITERAL_STRING("NodeSet expected as argument"), NS_ERROR_XSLT_NODESET_EXPECTED);
return NS_ERROR_XSLT_NODESET_EXPECTED;
}
*aResult =
static_cast<txNodeSet*>(static_cast<txAExprResult*>(exprRes));
NS_ADDREF(*aResult);
return NS_OK;
}
bool FunctionCall::requireParams(int32_t aParamCountMin,
int32_t aParamCountMax,
txIEvalContext* aContext)
{
int32_t argc = mParams.Length();
if (argc < aParamCountMin ||
(aParamCountMax > -1 && argc > aParamCountMax)) {
nsAutoString err(NS_LITERAL_STRING("invalid number of parameters for function"));
#ifdef TX_TO_STRING
err.AppendLiteral(": ");
toString(err);
#endif
aContext->receiveError(err, NS_ERROR_XPATH_INVALID_ARG);
return false;
}
return true;
}
Expr*
FunctionCall::getSubExprAt(uint32_t aPos)
{
return mParams.SafeElementAt(aPos);
}
void
FunctionCall::setSubExprAt(uint32_t aPos, Expr* aExpr)
{
NS_ASSERTION(aPos < mParams.Length(),
"setting bad subexpression index");
mParams[aPos] = aExpr;
}
bool
FunctionCall::argsSensitiveTo(ContextSensitivity aContext)
{
uint32_t i, len = mParams.Length();
for (i = 0; i < len; ++i) {
if (mParams[i]->isSensitiveTo(aContext)) {
return true;
}
}
return false;
}
#ifdef TX_TO_STRING
void
FunctionCall::toString(nsAString& aDest)
{
nsCOMPtr<nsIAtom> functionNameAtom;
if (NS_FAILED(getNameAtom(getter_AddRefs(functionNameAtom)))) {
NS_ERROR("Can't get function name.");
return;
}
aDest.Append(nsDependentAtomString(functionNameAtom) +
NS_LITERAL_STRING("("));
for (uint32_t i = 0; i < mParams.Length(); ++i) {
if (i != 0) {
aDest.Append(char16_t(','));
}
mParams[i]->toString(aDest);
}
aDest.Append(char16_t(')'));
}
#endif
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