/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla Communicator client code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Original Author: David W. Hyatt (hyatt@netscape.com)
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "nsXBLInsertionPoint.h"
#include "nsContentUtils.h"

nsXBLInsertionPoint::nsXBLInsertionPoint(nsIContent* aParentElement,
                                         PRUint32 aIndex,
                                         nsIContent* aDefaultContent)
  : mParentElement(aParentElement),
    mIndex(aIndex),
    mDefaultContentTemplate(aDefaultContent)
{
}

nsXBLInsertionPoint::~nsXBLInsertionPoint()
{
}

nsrefcnt
nsXBLInsertionPoint::Release()
{
  --mRefCnt;
  NS_LOG_RELEASE(this, mRefCnt, "nsXBLInsertionPoint");
  if (mRefCnt == 0) {
    mRefCnt = 1;
    delete this;
    return 0;
  }
  return mRefCnt;
}

NS_IMPL_CYCLE_COLLECTION_CLASS(nsXBLInsertionPoint)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_NATIVE(nsXBLInsertionPoint)
  NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMARRAY(mElements)
  NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mDefaultContentTemplate)
  NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mDefaultContent)
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NATIVE_BEGIN(nsXBLInsertionPoint)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMARRAY(mElements)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mDefaultContentTemplate)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mDefaultContent)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(nsXBLInsertionPoint, AddRef)
NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(nsXBLInsertionPoint, Release)

nsIContent*
nsXBLInsertionPoint::GetInsertionParent()
{
  return mParentElement;
}

nsIContent*
nsXBLInsertionPoint::GetDefaultContent()
{
  return mDefaultContent;
}

nsIContent*
nsXBLInsertionPoint::GetDefaultContentTemplate()
{
  return mDefaultContentTemplate;
}

nsIContent*
nsXBLInsertionPoint::ChildAt(PRUint32 aIndex)
{
  return mElements.ObjectAt(aIndex);
}

PRBool
nsXBLInsertionPoint::Matches(nsIContent* aContent, PRUint32 aIndex)
{
  return (aContent == mParentElement && mIndex != -1 && ((PRInt32)aIndex) == mIndex);
}

void
nsXBLInsertionPoint::UnbindDefaultContent()
{
  if (!mDefaultContent) {
    return;
  }

  // Hold a strong ref while doing this, just in case
  nsCOMPtr<nsIContent> defContent = mDefaultContent;

  nsAutoScriptBlocker scriptBlocker;

  // Unbind the _kids_ of the default content, not just the default content
  // itself, since they are bound to some other parent.  Basically we want to
  // undo the mess that InstallAnonymousContent created.
  PRUint32 childCount = mDefaultContent->GetChildCount();
  for (PRUint32 i = 0; i < childCount; i++) {
    defContent->GetChildAt(i)->UnbindFromTree();
  }

  defContent->UnbindFromTree();
}