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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) 2004
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Brian Ryner <bryner@brianryner.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 "nsIXFormsValueElement.h"
#include "nsXFormsStubElement.h"
#include "nsIXTFGenericElementWrapper.h"
#include "nsIDOM3Node.h"
#include "nsXFormsUtils.h"
#include "nsIDOMElement.h"
#include "nsString.h"
/**
* Implementation of the XForms \<value\> element.
*
* @note The value element does not display any content, it simply provides
* a value from inline text or instance data.
*/
class nsXFormsValueElement : public nsXFormsStubElement,
public nsIXFormsValueElement
{
public:
nsXFormsValueElement() : mElement(nsnull) {}
NS_DECL_ISUPPORTS_INHERITED
// nsIXTFGenericElement overrides
NS_IMETHOD OnCreated(nsIXTFGenericElementWrapper *aWrapper);
// nsIXFormsValueElement
NS_DECL_NSIXFORMSVALUEELEMENT
private:
nsIDOMElement *mElement;
};
NS_IMPL_ISUPPORTS_INHERITED1(nsXFormsValueElement,
nsXFormsStubElement,
nsIXFormsValueElement)
NS_IMETHODIMP
nsXFormsValueElement::OnCreated(nsIXTFGenericElementWrapper *aWrapper)
{
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;
}
// nsIXFormsValueElement
NS_IMETHODIMP
nsXFormsValueElement::GetValue(nsAString &aValue)
{
nsString value;
PRBool singleNodeVal =
nsXFormsUtils::GetSingleNodeBindingValue(mElement, value);
if (singleNodeVal) {
aValue.Assign(value);
return NS_OK;
}
nsCOMPtr<nsIDOM3Node> node3 = do_QueryInterface(mElement);
NS_ASSERTION(node3, "dom elements must support dom3");
return node3->GetTextContent(aValue);
}
NS_HIDDEN_(nsresult)
NS_NewXFormsValueElement(nsIXTFElement **aResult)
{
*aResult = new nsXFormsValueElement();
if (!*aResult)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*aResult);
return NS_OK;
}
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