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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "nsAtom.h"
#include "txIXPathContext.h"
#include "txNodeSet.h"
#ifdef TX_TO_STRING
# include "nsReadableUtils.h"
#endif
/**
* 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(u"NodeSet expected as argument"_ns,
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(u"invalid number of parameters for function"_ns);
#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) {
appendName(aDest);
aDest.AppendLiteral("(");
StringJoinAppend(
aDest, u","_ns, mParams,
[](nsAString& dest, const auto& param) { param->toString(dest); });
aDest.Append(char16_t(')'));
}
#endif
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