/* -*- 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/. */

/*

  A package of routines shared by the XUL content code.

 */

#include "mozilla/ArrayUtils.h"

#include "nsCollationCID.h"

#include "nsCOMPtr.h"

#include "nsIContent.h"

#include "nsICollation.h"

#include "nsIDocument.h"

#include "nsIDOMXULCommandDispatcher.h"

#include "nsIServiceManager.h"

#include "nsXULContentUtils.h"

#include "nsLayoutCID.h"

#include "nsString.h"

#include "nsGkAtoms.h"

#include "XULDocument.h"

using namespace mozilla;

using dom::XULDocument;

//------------------------------------------------------------------------

nsICollation *nsXULContentUtils::gCollation;

//------------------------------------------------------------------------

// Constructors n' stuff

//

nsresult

nsXULContentUtils::Finish()

{

    NS_IF_RELEASE(gCollation);

    return NS_OK;

}

nsICollation*

nsXULContentUtils::GetCollation()

{

    if (!gCollation) {

        nsCOMPtr<nsICollationFactory> colFactory =

            do_CreateInstance(NS_COLLATIONFACTORY_CONTRACTID);

        if (colFactory) {

            DebugOnly<nsresult> rv = colFactory->CreateCollation(&gCollation);

            NS_ASSERTION(NS_SUCCEEDED(rv),

                         "couldn't create collation instance");

        } else

            NS_ERROR("couldn't create instance of collation factory");

    }

    return gCollation;

}

//------------------------------------------------------------------------

//

nsresult

nsXULContentUtils::FindChildByTag(nsIContent* aElement,

                                  int32_t aNameSpaceID,

                                  nsAtom* aTag,

                                  Element** aResult)

{

    for (nsIContent* child = aElement->GetFirstChild();

         child;

         child = child->GetNextSibling()) {

        if (child->IsElement() &&

            child->NodeInfo()->Equals(aTag, aNameSpaceID)) {

            NS_ADDREF(*aResult = child->AsElement());

            return NS_OK;

        }

    }

    *aResult = nullptr;

    return NS_RDF_NO_VALUE; // not found

}