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/* -*- 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
* IBM Corporation.
* Portions created by the Initial Developer are Copyright (C) 2005
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Aaron Reed <aaronr@us.ibm.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either 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 "nsIXFormsCopyElement.h"
#include "nsXFormsStubElement.h"
#include "nsIXTFGenericElementWrapper.h"
#include "nsXFormsUtils.h"
#include "nsIDOMElement.h"
#include "nsString.h"
#include "nsIXFormsItemElement.h"
/**
* Implementation of the XForms \<copy\> element.
*
* @note The copy element does not display any content, it simply provides
* a node to be copied to instance data when the containing XForms item
* element is selected.
*/
class nsXFormsCopyElement : public nsXFormsStubElement,
public nsIXFormsCopyElement
{
public:
nsXFormsCopyElement() : mElement(nsnull) {}
NS_DECL_ISUPPORTS_INHERITED
// nsIXTFGenericElement overrides
NS_IMETHOD OnCreated(nsIXTFGenericElementWrapper *aWrapper);
// nsIXTFElement overrides
NS_IMETHOD ParentChanged(nsIDOMElement *aNewParent);
NS_IMETHOD DocumentChanged(nsIDOMDocument *aNewParent);
// nsIXFormsCopyElement
NS_DECL_NSIXFORMSCOPYELEMENT
private:
nsIDOMElement *mElement;
};
NS_IMPL_ISUPPORTS_INHERITED1(nsXFormsCopyElement,
nsXFormsStubElement,
nsIXFormsCopyElement)
NS_IMETHODIMP
nsXFormsCopyElement::OnCreated(nsIXTFGenericElementWrapper *aWrapper)
{
aWrapper->SetNotificationMask(nsIXTFElement::NOTIFY_PARENT_CHANGED |
nsIXTFElement::NOTIFY_DOCUMENT_CHANGED);
nsCOMPtr<nsIDOMElement> node;
aWrapper->GetElementNode(getter_AddRefs(node));
// It's ok to keep 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.
mElement = node;
NS_ASSERTION(mElement, "Wrapper is not an nsIDOMElement, we'll crash soon");
return NS_OK;
}
// nsIXTFElement
NS_IMETHODIMP
nsXFormsCopyElement::ParentChanged(nsIDOMElement *aNewParent)
{
if (aNewParent) {
if (!nsXFormsUtils::IsXFormsElement(aNewParent,
NS_LITERAL_STRING("itemset")) &&
!nsXFormsUtils::IsXFormsElement(aNewParent,
NS_LITERAL_STRING("item"))) {
// Parent of a copy element must always be an itemset. We really can't
// enforce this all that well until we have full schema support but for
// now we'll at least warn the author. We are also checking for
// item because under Mozilla, the children of an itemset
// element are cloned underneath an nsXFormsItemElement. Each such
// item element is then appended as anonymous content of the itemset.
nsXFormsUtils::ReportError(NS_LITERAL_STRING("copyError"), mElement);
}
}
return NS_OK;
}
NS_IMETHODIMP
nsXFormsCopyElement::DocumentChanged(nsIDOMDocument* aNewDocument)
{
if (!aNewDocument)
return NS_OK;
// tell parent (xf:item) that it contains a xf:copy element and
// not a xf:value element.
nsCOMPtr<nsIDOMNode> itemNode;
nsresult rv = mElement->GetParentNode(getter_AddRefs(itemNode));
NS_ENSURE_TRUE(itemNode, rv);
nsCOMPtr<nsIXFormsItemElement> item = do_QueryInterface(itemNode);
// It is possible that the grandparent ISN'T an xf:item, if this is the
// original template copy element whose parent is the xf:itemset and
// grandparent is the xf:select. We'll ignore a copy element in that case
// since it really isn't in play.
if (item) {
item->SetIsCopyItem(PR_TRUE);
}
return NS_OK;
}
// nsIXFormsCopyElement
NS_IMETHODIMP
nsXFormsCopyElement::GetCopyNode(nsIDOMNode **aNode)
{
NS_ENSURE_ARG_POINTER(aNode);
*aNode = nsnull;
nsCOMPtr<nsIDOMNode> singleNode;
nsCOMPtr<nsIModelElementPrivate> model;
PRBool succeeded =
nsXFormsUtils::GetSingleNodeBinding(mElement,
getter_AddRefs(singleNode),
getter_AddRefs(model));
if (succeeded && singleNode)
NS_ADDREF(*aNode = singleNode);
return NS_OK;
}
NS_HIDDEN_(nsresult)
NS_NewXFormsCopyElement(nsIXTFElement **aResult)
{
*aResult = new nsXFormsCopyElement();
if (!*aResult)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*aResult);
return NS_OK;
}
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