michael@0: /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef nsXPathExpression_h__
michael@0: #define nsXPathExpression_h__
michael@0: 
michael@0: #include "nsIDOMXPathExpression.h"
michael@0: #include "nsIDOMNSXPathExpression.h"
michael@0: #include "txIXPathContext.h"
michael@0: #include "txResultRecycler.h"
michael@0: #include "nsAutoPtr.h"
michael@0: #include "nsCycleCollectionParticipant.h"
michael@0: #include "mozilla/Attributes.h"
michael@0: 
michael@0: class Expr;
michael@0: class txXPathNode;
michael@0: 
michael@0: /**
michael@0:  * A class for evaluating an XPath expression string
michael@0:  */
michael@0: class nsXPathExpression MOZ_FINAL : public nsIDOMXPathExpression,
michael@0:                                     public nsIDOMNSXPathExpression
michael@0: {
michael@0: public:
michael@0:     nsXPathExpression(nsAutoPtr<Expr>& aExpression, txResultRecycler* aRecycler,
michael@0:                       nsIDOMDocument *aDocument);
michael@0: 
michael@0:     // nsISupports interface
michael@0:     NS_DECL_CYCLE_COLLECTING_ISUPPORTS
michael@0:     NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(nsXPathExpression,
michael@0:                                              nsIDOMXPathExpression)
michael@0: 
michael@0:     // nsIDOMXPathExpression interface
michael@0:     NS_DECL_NSIDOMXPATHEXPRESSION
michael@0: 
michael@0:     // nsIDOMNSXPathExpression interface
michael@0:     NS_DECL_NSIDOMNSXPATHEXPRESSION
michael@0: 
michael@0: private:
michael@0:     nsAutoPtr<Expr> mExpression;
michael@0:     nsRefPtr<txResultRecycler> mRecycler;
michael@0:     nsCOMPtr<nsIDOMDocument> mDocument;
michael@0: 
michael@0:     class EvalContextImpl : public txIEvalContext
michael@0:     {
michael@0:     public:
michael@0:         EvalContextImpl(const txXPathNode& aContextNode,
michael@0:                         uint32_t aContextPosition, uint32_t aContextSize,
michael@0:                         txResultRecycler* aRecycler)
michael@0:             : mContextNode(aContextNode),
michael@0:               mContextPosition(aContextPosition),
michael@0:               mContextSize(aContextSize),
michael@0:               mLastError(NS_OK),
michael@0:               mRecycler(aRecycler)
michael@0:         {
michael@0:         }
michael@0: 
michael@0:         nsresult getError()
michael@0:         {
michael@0:             return mLastError;
michael@0:         }
michael@0: 
michael@0:         TX_DECL_EVAL_CONTEXT;
michael@0: 
michael@0:     private:
michael@0:         const txXPathNode& mContextNode;
michael@0:         uint32_t mContextPosition;
michael@0:         uint32_t mContextSize;
michael@0:         nsresult mLastError;
michael@0:         nsRefPtr<txResultRecycler> mRecycler;
michael@0:     };
michael@0: };
michael@0: 
michael@0: #endif