pjs/extensions/xforms/nsXFormsStubElement.h

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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 ***** */
#ifndef nsXFormsStubElement_h_
#define nsXFormsStubElement_h_
#include "nsIXTFElement.h"
#include "nsIXFormsControlBase.h"
#include "nsIDOMElement.h"
/**
* nsRepeatState is used to indicate whether the element is inside a
* \<repeat\> or \<itemset\> template. If it is, there is no need
* to refresh the widget bound to the element.
*
* eType_Unknown - repeat state has yet to be determined
* eType_Template - element lives inside the template (an original element
* from the document that is hidden from the user)
* eType_GeneratedContent - A generated clone of an element from the template.
* It is generated as the repeat or itemset processes
* the nodeset that it is bound to. For every node in
* the nodeset, the repeat or itemset will go through
* its template and create a clone for every element
* in the template. A user will see these elements.
* eType_NotApplicable - element lives in the DOM and is not contained
* by a repeat or an itemset
*/
enum nsRepeatState {
eType_Unknown,
eType_Template,
eType_GeneratedContent,
eType_NotApplicable
};
/**
* An implementation of a generic XForms element.
*/
class nsXFormsStubElement : public nsIXTFElement
{
protected:
// We need a virtual destructor so that when a subclass does
// NS_IMPL_ISUPPORTS_INHERITED, our Release() implementation calls the
// derived class destructor.
virtual ~nsXFormsStubElement() {}
/**
* This is processed when an XForms control or XForms action has been inserted
* under a parent node AND has been inserted into a document.
* It checks the ancestors of the element and returns an nsRepeatState
* depending on the element's place in the document.
*
* @param aParent The new parent of the XForms control
*/
virtual nsRepeatState UpdateRepeatState(nsIDOMNode *aParent);
nsRepeatState mRepeatState;
/**
* State that tells whether control has a parent or not. This could be
* false even if the control has a parent. Just means that the element
* doesn't need to track whether it has a parent or not (i.e. xf:choices)
*/
PRPackedBool mHasParent;
/**
* State that tells whether control has a document or not. This could be
* false even if the control has a document. Just means that the element
* doesn't need to track whether it has a document or not (i.e. xf:choices)
*/
PRPackedBool mHasDoc;
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIXTFELEMENT
/** Constructor */
nsXFormsStubElement() :
mRepeatState(eType_Unknown),
mHasParent(PR_FALSE),
mHasDoc(PR_FALSE)
{};
/**
* Get/Set the repeat state for the xforms control or action. The repeat
* state indicates whether the control or action lives inside a context
* container, a repeat element, an itemset or none of the above.
*/
virtual nsRepeatState GetRepeatState();
virtual void SetRepeatState(nsRepeatState aState);
};
/* Factory methods */
NS_HIDDEN_(nsresult)
NS_NewXFormsStubElement(nsIXTFElement **aResult);
#endif