/* -*- 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/. */

#ifndef mozilla_dom_XPathExpression_h
#define mozilla_dom_XPathExpression_h

#include "nsCycleCollectionParticipant.h"
#include "nsIWeakReferenceUtils.h"
#include "mozilla/Attributes.h"
#include "mozilla/dom/NonRefcountedDOMObject.h"
#include "mozilla/dom/XPathExpressionBinding.h"
#include "mozilla/UniquePtr.h"

class Expr;

class nsINode;
class txResultRecycler;

namespace mozilla {
namespace dom {

class Document;
class XPathResult;

/**
 * A class for evaluating an XPath expression string
 */
class XPathExpression final : public NonRefcountedDOMObject {
 public:
  XPathExpression(mozilla::UniquePtr<Expr>&& aExpression,
                  txResultRecycler* aRecycler, Document* aDocument);
  ~XPathExpression();

  bool WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto,
                  JS::MutableHandle<JSObject*> aReflector) {
    return XPathExpression_Binding::Wrap(aCx, this, aGivenProto, aReflector);
  }

  already_AddRefed<XPathResult> Evaluate(JSContext* aCx, nsINode& aContextNode,
                                         uint16_t aType,
                                         JS::Handle<JSObject*> aInResult,
                                         ErrorResult& aRv) {
    return EvaluateWithContext(aCx, aContextNode, 1, 1, aType, aInResult, aRv);
  }
  already_AddRefed<XPathResult> EvaluateWithContext(
      JSContext* aCx, nsINode& aContextNode, uint32_t aContextPosition,
      uint32_t aContextSize, uint16_t aType, JS::Handle<JSObject*> aInResult,
      ErrorResult& aRv);
  already_AddRefed<XPathResult> Evaluate(nsINode& aContextNode, uint16_t aType,
                                         XPathResult* aInResult,
                                         ErrorResult& aRv) {
    return EvaluateWithContext(aContextNode, 1, 1, aType, aInResult, aRv);
  }
  already_AddRefed<XPathResult> EvaluateWithContext(
      nsINode& aContextNode, uint32_t aContextPosition, uint32_t aContextSize,
      uint16_t aType, XPathResult* aInResult, ErrorResult& aRv);

 private:
  mozilla::UniquePtr<Expr> mExpression;
  RefPtr<txResultRecycler> mRecycler;
  nsWeakPtr mDocument;
  bool mCheckDocument;
};

}  // namespace dom
}  // namespace mozilla

#endif /* mozilla_dom_XPathExpression_h */