gecko-dev/extensions/xforms/nsXFormsGroupElement.cpp

143 lines
4.0 KiB
C++

/* -*- 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) 2004
* 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 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 "nsAutoPtr.h"
#include "nsCOMPtr.h"
#include "nsString.h"
#include "nsIDOM3Node.h"
#include "nsIDOMElement.h"
#include "nsIDOMDocument.h"
#include "nsIDOMNodeList.h"
#include "nsIDOMEventTarget.h"
#include "nsIDOMXPathResult.h"
#include "nsIDOMHTMLDivElement.h"
#include "nsIXTFXMLVisual.h"
#include "nsIXTFXMLVisualWrapper.h"
#include "nsXFormsControlStub.h"
#include "nsIModelElementPrivate.h"
#include "nsXFormsUtils.h"
#include "nsXFormsDelegateStub.h"
#ifdef DEBUG
// #define DEBUG_XF_GROUP
#endif
/**
* Implementation of the XForms \<group\> control.
*
* @see http://www.w3.org/TR/xforms/slice9.html#id2631290
*
* @todo XXX: If a \<label\> is the first element child for \<group\> it is the
* label for the entire group
*
* @todo XXX: With some small adjustments we could let nsXFormsContextContainer
* implement group, and get rid of this class (XXX).
*/
class nsXFormsGroupElement : public nsXFormsDelegateStub
{
protected:
/** Tries to focus a child form control.*/
PRBool TryFocusChildControl(nsIDOMNode *aParent);
public:
// nsIXFormsControl
NS_IMETHOD TryFocus(PRBool *aOK);
#ifdef DEBUG_smaug
virtual const char* Name() { return "group"; }
#endif
};
PRBool
nsXFormsGroupElement::TryFocusChildControl(nsIDOMNode* aParent)
{
if (!aParent)
return PR_FALSE;
nsCOMPtr<nsIDOMNodeList> children;
nsresult rv = aParent->GetChildNodes(getter_AddRefs(children));
if (NS_FAILED(rv))
return PR_FALSE;
PRUint32 childCount = 0;
children->GetLength(&childCount);
nsCOMPtr<nsIDOMNode> child;
for (PRUint32 i = 0; i < childCount; ++i) {
children->Item(i, getter_AddRefs(child));
nsCOMPtr<nsIXFormsControl> control(do_QueryInterface(child));
PRBool focus = PR_FALSE;
if (control) {
control->TryFocus(&focus);
if (focus)
return PR_TRUE;
}
focus = TryFocusChildControl(child);
if (focus)
return PR_TRUE;
}
return PR_FALSE;
}
NS_IMETHODIMP
nsXFormsGroupElement::TryFocus(PRBool* aOK)
{
*aOK = PR_FALSE;
if (GetRelevantState()) {
*aOK = TryFocusChildControl(mElement);
}
return NS_OK;
}
// Factory
NS_HIDDEN_(nsresult)
NS_NewXFormsGroupElement(nsIXTFElement **aResult)
{
*aResult = new nsXFormsGroupElement();
if (!*aResult)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*aResult);
return NS_OK;
}