/* -*- 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 XForms support.
 *
 * The Initial Developer of the Original Code is
 * Olli Pettay.
 * Portions created by the Initial Developer are Copyright (C) 2004
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Olli Pettay <Olli.Pettay@helsinki.fi> (original author)
 *
 * 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 "nsXFormsActionModuleBase.h"
#include "nsXFormsActionElement.h"
#include "nsIDOM3Node.h"
#include "nsMemory.h"
#include "nsIDOMNodeList.h"
#include "nsXFormsModelElement.h"
#include "nsString.h"
#include "nsIDOMElement.h"
#include "nsIDOMNodeList.h"
#include "nsIXTFGenericElementWrapper.h"
#include "nsIDOMDocumentEvent.h"
#include "nsIDOMEventTarget.h"

nsXFormsActionModuleBase::nsXFormsActionModuleBase() : mElement(nsnull)
{
}

nsXFormsActionModuleBase::~nsXFormsActionModuleBase()
{
}

NS_IMPL_ISUPPORTS_INHERITED2(nsXFormsActionModuleBase,
                             nsXFormsStubElement,
                             nsIXFormsActionModuleElement,
                             nsIDOMEventListener)

NS_IMETHODIMP
nsXFormsActionModuleBase::OnCreated(nsIXTFGenericElementWrapper *aWrapper)
{
  // It's ok to keep a weak pointer to mElement.  mElement will have an
  // owning reference to this object, so as long as we null out mElement in
  // OnDestroyed, it will always be valid.
  nsCOMPtr<nsIDOMElement> node;
  aWrapper->GetElementNode(getter_AddRefs(node));
  mElement = node;
  NS_ASSERTION(mElement, "Wrapper is not an nsIDOMElement, we'll crash soon");

  aWrapper->SetNotificationMask(nsIXTFElement::NOTIFY_WILL_CHANGE_DOCUMENT |
                                nsIXTFElement::NOTIFY_WILL_CHANGE_PARENT |
                                nsIXTFElement::NOTIFY_DOCUMENT_CHANGED |
                                nsIXTFElement::NOTIFY_PARENT_CHANGED);

  return NS_OK;
}

NS_IMETHODIMP nsXFormsActionModuleBase::OnDestroyed()
{
  mElement = nsnull;
  return NS_OK;
}

NS_IMETHODIMP
nsXFormsActionModuleBase::WillChangeParent(nsIDOMElement *aNewParent)
{
  SetRepeatState(eType_Unknown);
  return NS_OK;
}

NS_IMETHODIMP
nsXFormsActionModuleBase::ParentChanged(nsIDOMElement *aNewParent)
{
  nsXFormsStubElement::ParentChanged(aNewParent);
  UpdateRepeatState(aNewParent);
  return NS_OK;
}

NS_IMETHODIMP
nsXFormsActionModuleBase::WillChangeDocument(nsIDOMDocument *aNewDocument)
{
  SetRepeatState(eType_Unknown);
  return NS_OK;
}

NS_IMETHODIMP
nsXFormsActionModuleBase::DocumentChanged(nsIDOMDocument *aNewDocument)
{
  nsXFormsStubElement::DocumentChanged(aNewDocument);

  nsCOMPtr<nsIDOMNode> parent;
  mElement->GetParentNode(getter_AddRefs(parent));
  UpdateRepeatState(parent);
  return NS_OK;
}

NS_IMETHODIMP
nsXFormsActionModuleBase::HandleEvent(nsIDOMEvent* aEvent)
{
  if (GetRepeatState() == eType_Template) {
    return NS_OK;
  }

  return nsXFormsUtils::EventHandlingAllowed(aEvent, mElement) ?
           HandleAction(aEvent, nsnull) : NS_OK;
}

