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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
* Novell, Inc.
* Portions created by the Initial Developer are Copyright (C) 2005
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Allan Beaufour <abeaufour@novell.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 <math.h>
#include "nsIDOMDocument.h"
#include "nsIDOMXPathResult.h"
#include "nsIXFormsRepeatElement.h"
#include "nsXFormsActionModuleBase.h"
#include "nsXFormsActionElement.h"
#ifdef DEBUG
//#define DEBUG_XF_SETINDEX
#endif
/**
* Implementation of the XForms \<setindex\> element.
*
* To set the index for a \<repeat\>, we find the (DOM) \<repeat\> with the
* given @id, and call nsIXFormsRepeatElement::SetIndex() on it.
*
* @see http://www.w3.org/TR/xforms/slice9.html#action-setRepeatCursor
*/
class nsXFormsSetIndexElement : public nsXFormsActionModuleBase
{
public:
virtual nsresult HandleSingleAction(nsIDOMEvent* aEvent,
nsIXFormsActionElement *aParentAction);
};
nsresult
nsXFormsSetIndexElement::HandleSingleAction(nsIDOMEvent *aEvent,
nsIXFormsActionElement *aParentAction)
{
// Get @repeat and @index
nsAutoString id, index;
NS_NAMED_LITERAL_STRING(repeatStr, "repeat");
mElement->GetAttribute(repeatStr, id);
NS_NAMED_LITERAL_STRING(indexStr, "index");
mElement->GetAttribute(indexStr, index);
if (id.IsEmpty() || index.IsEmpty()) {
/// @todo Should we dispatch an exception, or just define that this does
/// not happen as it is a non-validating form as both are required
/// attributes, and index should be an integer? (XXX)
return NS_ERROR_ABORT;
}
// Find index (XPath) value
nsresult rv;
nsCOMPtr<nsIModelElementPrivate> model;
nsCOMPtr<nsIDOMXPathResult> result;
// EvaluateNodeBinding uses @bind if @index is not present, but we have
// checked that @index is present above
PRBool usesModelBinding;
rv = nsXFormsUtils::EvaluateNodeBinding(mElement,
0,
indexStr,
EmptyString(),
nsIDOMXPathResult::NUMBER_TYPE,
getter_AddRefs(model),
getter_AddRefs(result),
&usesModelBinding);
NS_ENSURE_SUCCESS(rv, rv);
if (!result) {
nsXFormsUtils::ReportError(NS_LITERAL_STRING("indexEvalError"),
mElement);
return NS_OK;
}
double indexDoub;
rv = result->GetNumberValue(&indexDoub);
NS_ENSURE_SUCCESS(rv, rv);
PRUint32 indexInt = indexDoub < 1 ? 0 : (PRUint32) floor(indexDoub);
#ifdef DEBUG_XF_SETINDEX
printf("<setindex>: Setting index '%s' to '%d'\n",
NS_ConvertUTF16toUTF8(id).get(),
indexInt);
#endif
// Find the \<repeat\> with @id == |id|
nsCOMPtr<nsIDOMElement> repeatElem;
nsXFormsUtils::GetElementByContextId(mElement, id,
getter_AddRefs(repeatElem));
nsCOMPtr<nsIXFormsRepeatElement> repeat = do_QueryInterface(repeatElem);
if (!repeat) {
const PRUnichar *strings[] = { id.get(), repeatStr.get() };
nsXFormsUtils::ReportError(NS_LITERAL_STRING("idRefError"),
strings, 2, mElement, mElement);
return NS_OK;
}
// Set the index = |indexInt|
return repeat->SetIndex(&indexInt, PR_FALSE);
}
NS_HIDDEN_(nsresult)
NS_NewXFormsSetIndexElement(nsIXTFElement **aResult)
{
*aResult = new nsXFormsSetIndexElement();
if (!*aResult)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*aResult);
return NS_OK;
}
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