forked from mirrors/gecko-dev
9758d919eb
Bug 1583109 introduced new function templates StringJoin and StringJoinAppend. These are now used to replace several custom loops across the codebase that implement string-joining algorithms to simplify the code. Differential Revision: https://phabricator.services.mozilla.com/D98750
110 lines
3.1 KiB
C++
110 lines
3.1 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "txExpr.h"
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#include "nsAtom.h"
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#include "txIXPathContext.h"
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#include "txNodeSet.h"
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#ifdef TX_TO_STRING
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# include "nsReadableUtils.h"
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#endif
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/**
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* This class represents a FunctionCall as defined by the XSL Working Draft
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**/
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//------------------/
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//- Public Methods -/
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//------------------/
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/*
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* Evaluates the given Expression and converts its result to a number.
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*/
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// static
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nsresult FunctionCall::evaluateToNumber(Expr* aExpr, txIEvalContext* aContext,
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double* aResult) {
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NS_ASSERTION(aExpr, "missing expression");
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RefPtr<txAExprResult> exprResult;
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nsresult rv = aExpr->evaluate(aContext, getter_AddRefs(exprResult));
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NS_ENSURE_SUCCESS(rv, rv);
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*aResult = exprResult->numberValue();
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return NS_OK;
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}
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/*
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* Evaluates the given Expression and converts its result to a NodeSet.
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* If the result is not a NodeSet nullptr is returned.
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*/
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nsresult FunctionCall::evaluateToNodeSet(Expr* aExpr, txIEvalContext* aContext,
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txNodeSet** aResult) {
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NS_ASSERTION(aExpr, "Missing expression to evaluate");
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*aResult = nullptr;
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RefPtr<txAExprResult> exprRes;
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nsresult rv = aExpr->evaluate(aContext, getter_AddRefs(exprRes));
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NS_ENSURE_SUCCESS(rv, rv);
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if (exprRes->getResultType() != txAExprResult::NODESET) {
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aContext->receiveError(u"NodeSet expected as argument"_ns,
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NS_ERROR_XSLT_NODESET_EXPECTED);
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return NS_ERROR_XSLT_NODESET_EXPECTED;
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}
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*aResult = static_cast<txNodeSet*>(static_cast<txAExprResult*>(exprRes));
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NS_ADDREF(*aResult);
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return NS_OK;
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}
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bool FunctionCall::requireParams(int32_t aParamCountMin, int32_t aParamCountMax,
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txIEvalContext* aContext) {
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int32_t argc = mParams.Length();
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if (argc < aParamCountMin || (aParamCountMax > -1 && argc > aParamCountMax)) {
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nsAutoString err(u"invalid number of parameters for function"_ns);
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#ifdef TX_TO_STRING
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err.AppendLiteral(": ");
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toString(err);
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#endif
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aContext->receiveError(err, NS_ERROR_XPATH_INVALID_ARG);
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return false;
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}
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return true;
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}
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Expr* FunctionCall::getSubExprAt(uint32_t aPos) {
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return mParams.SafeElementAt(aPos);
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}
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void FunctionCall::setSubExprAt(uint32_t aPos, Expr* aExpr) {
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NS_ASSERTION(aPos < mParams.Length(), "setting bad subexpression index");
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mParams[aPos] = aExpr;
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}
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bool FunctionCall::argsSensitiveTo(ContextSensitivity aContext) {
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uint32_t i, len = mParams.Length();
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for (i = 0; i < len; ++i) {
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if (mParams[i]->isSensitiveTo(aContext)) {
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return true;
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}
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}
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return false;
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}
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#ifdef TX_TO_STRING
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void FunctionCall::toString(nsAString& aDest) {
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appendName(aDest);
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aDest.AppendLiteral("(");
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StringJoinAppend(
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aDest, u","_ns, mParams,
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[](nsAString& dest, const auto& param) { param->toString(dest); });
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aDest.Append(char16_t(')'));
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}
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#endif
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