tor-browser

The Tor Browser
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XPathExpression.h (2456B)

      1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* This Source Code Form is subject to the terms of the Mozilla Public
      3 * License, v. 2.0. If a copy of the MPL was not distributed with this
      4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      5 
      6 #ifndef mozilla_dom_XPathExpression_h
      7 #define mozilla_dom_XPathExpression_h
      8 
      9 #include "mozilla/UniquePtr.h"
     10 #include "mozilla/dom/NonRefcountedDOMObject.h"
     11 #include "mozilla/dom/XPathExpressionBinding.h"
     12 #include "nsCycleCollectionParticipant.h"
     13 #include "nsIWeakReferenceUtils.h"
     14 
     15 class Expr;
     16 
     17 class nsINode;
     18 class txResultRecycler;
     19 
     20 namespace mozilla::dom {
     21 
     22 class Document;
     23 class XPathResult;
     24 
     25 /**
     26 * A class for evaluating an XPath expression string
     27 */
     28 class XPathExpression final : public NonRefcountedDOMObject {
     29 public:
     30  XPathExpression(mozilla::UniquePtr<Expr>&& aExpression,
     31                  txResultRecycler* aRecycler, Document* aDocument);
     32  ~XPathExpression();
     33 
     34  bool WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto,
     35                  JS::MutableHandle<JSObject*> aReflector) {
     36    return XPathExpression_Binding::Wrap(aCx, this, aGivenProto, aReflector);
     37  }
     38 
     39  already_AddRefed<XPathResult> Evaluate(JSContext* aCx, nsINode& aContextNode,
     40                                         uint16_t aType,
     41                                         JS::Handle<JSObject*> aInResult,
     42                                         ErrorResult& aRv) {
     43    return EvaluateWithContext(aCx, aContextNode, 1, 1, aType, aInResult, aRv);
     44  }
     45  already_AddRefed<XPathResult> EvaluateWithContext(
     46      JSContext* aCx, nsINode& aContextNode, uint32_t aContextPosition,
     47      uint32_t aContextSize, uint16_t aType, JS::Handle<JSObject*> aInResult,
     48      ErrorResult& aRv);
     49  already_AddRefed<XPathResult> Evaluate(nsINode& aContextNode, uint16_t aType,
     50                                         XPathResult* aInResult,
     51                                         ErrorResult& aRv) {
     52    return EvaluateWithContext(aContextNode, 1, 1, aType, aInResult, aRv);
     53  }
     54  already_AddRefed<XPathResult> EvaluateWithContext(
     55      nsINode& aContextNode, uint32_t aContextPosition, uint32_t aContextSize,
     56      uint16_t aType, XPathResult* aInResult, ErrorResult& aRv);
     57 
     58 private:
     59  mozilla::UniquePtr<Expr> mExpression;
     60  RefPtr<txResultRecycler> mRecycler;
     61  nsWeakPtr mDocument;
     62  bool mCheckDocument;
     63 };
     64 
     65 }  // namespace mozilla::dom
     66 
     67 #endif /* mozilla_dom_XPathExpression_h */