/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* 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 "nsIRDFDataSource.h"
#include "nsIWindowMediatorListener.h"
#include "nsIWindowDataSource.h"
#include "nsIObserver.h"

#include "nsHashKeys.h"
#include "nsIRDFService.h"
#include "nsIRDFContainer.h"
#include "nsInterfaceHashtable.h"
#include "nsCycleCollectionParticipant.h"

// {C744CA3D-840B-460a-8D70-7CE63C51C958}
#define NS_WINDOWDATASOURCE_CID \
{ 0xc744ca3d, 0x840b, 0x460a, \
 { 0x8d, 0x70, 0x7c, 0xe6, 0x3c, 0x51, 0xc9, 0x58 } }


class nsWindowDataSource : public nsIRDFDataSource,
                           public nsIObserver,
                           public nsIWindowMediatorListener,
                           public nsIWindowDataSource
{
 public:
    nsWindowDataSource() { }

    nsresult Init();

    NS_DECL_CYCLE_COLLECTING_ISUPPORTS
    NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(nsWindowDataSource,
                                             nsIRDFDataSource)
    NS_DECL_NSIOBSERVER
    NS_DECL_NSIWINDOWMEDIATORLISTENER
    NS_DECL_NSIWINDOWDATASOURCE
    NS_DECL_NSIRDFDATASOURCE

 protected:
    virtual ~nsWindowDataSource();

 private:

    // mapping of window -> RDF resource
    nsInterfaceHashtable<nsPtrHashKey<nsIXULWindow>, nsIRDFResource> mWindowResources;

    static uint32_t windowCount;
    static uint32_t gRefCnt;

    nsCOMPtr<nsIRDFDataSource> mInner;
    nsCOMPtr<nsIRDFContainer> mContainer;

    static nsIRDFResource* kNC_Name;
    static nsIRDFResource* kNC_KeyIndex;
    static nsIRDFResource* kNC_WindowRoot;
    static nsIRDFService* gRDFService;
};
