/* 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 "nsGkAtoms.h"
#include "txXSLTFunctions.h"
#include "txExecutionState.h"

/*
  Implementation of XSLT 1.0 extension function: current
*/

/**
 * Creates a new current function call
 **/
CurrentFunctionCall::CurrentFunctionCall() = default;

/*
 * Evaluates this Expr
 *
 * @return NodeSet containing the context node used for the complete
 * Expr or Pattern.
 */
nsresult CurrentFunctionCall::evaluate(txIEvalContext* aContext,
                                       txAExprResult** aResult) {
  *aResult = nullptr;

  if (!requireParams(0, 0, aContext)) return NS_ERROR_XPATH_BAD_ARGUMENT_COUNT;

  txExecutionState* es =
      static_cast<txExecutionState*>(aContext->getPrivateContext());
  if (!es) {
    NS_ERROR("called xslt extension function \"current\" with wrong context");
    return NS_ERROR_UNEXPECTED;
  }
  return aContext->recycler()->getNodeSet(
      es->getEvalContext()->getContextNode(), aResult);
}

Expr::ResultType CurrentFunctionCall::getReturnType() { return NODESET_RESULT; }

bool CurrentFunctionCall::isSensitiveTo(ContextSensitivity aContext) {
  return !!(aContext & PRIVATE_CONTEXT);
}

#ifdef TX_TO_STRING
void CurrentFunctionCall::appendName(nsAString& aDest) {
  aDest.Append(nsGkAtoms::current->GetUTF16String());
}
#endif
