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304 lines
10 KiB
C++
304 lines
10 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla XForms support.
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*
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* The Initial Developer of the Original Code is
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* IBM Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2004
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Brian Ryner <bryner@brianryner.com>
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* Allan Beaufour <abeaufour@novell.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsXFormsUtils_h_
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#define nsXFormsUtils_h_
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#include "prtypes.h"
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#include "nsCOMPtr.h"
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#include "nsIDOMXPathResult.h"
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class nsIDOMNode;
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class nsIDOMElement;
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class nsIXFormsModelElement;
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class nsIURI;
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class nsString;
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#define NS_NAMESPACE_XFORMS "http://www.w3.org/2002/xforms"
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#define NS_NAMESPACE_XHTML "http://www.w3.org/1999/xhtml"
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#define NS_NAMESPACE_XML_SCHEMA "http://www.w3.org/2001/XMLSchema"
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#define NS_NAMESPACE_XML_SCHEMA_INSTANCE "http://www.w3.org/2001/XMLSchema-instance"
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/**
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* XForms event types
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*
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* @see http://www.w3.org/TR/xforms/slice4.html#rpm-events
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*/
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enum nsXFormsEvent {
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eEvent_ModelConstruct,
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eEvent_ModelConstructDone,
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eEvent_Ready,
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eEvent_ModelDestruct,
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eEvent_Previous,
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eEvent_Next,
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eEvent_Focus,
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eEvent_Help,
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eEvent_Hint,
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eEvent_Rebuild,
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eEvent_Refresh,
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eEvent_Revalidate,
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eEvent_Recalculate,
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eEvent_Reset,
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eEvent_Submit,
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eEvent_DOMActivate,
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eEvent_ValueChanged,
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eEvent_Select,
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eEvent_Deselect,
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eEvent_ScrollFirst,
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eEvent_ScrollLast,
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eEvent_Insert,
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eEvent_Delete,
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eEvent_Valid,
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eEvent_Invalid,
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eEvent_DOMFocusIn,
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eEvent_DOMFocusOut,
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eEvent_Readonly,
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eEvent_Readwrite,
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eEvent_Required,
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eEvent_Optional,
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eEvent_Enabled,
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eEvent_Disabled,
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eEvent_InRange,
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eEvent_OutOfRange,
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eEvent_SubmitDone,
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eEvent_SubmitError,
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eEvent_BindingException,
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eEvent_LinkException,
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eEvent_LinkError,
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eEvent_ComputeException
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};
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/**
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* This class has static helper methods that don't fit into a specific place
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* in the class hierarchy.
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*/
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class nsXFormsUtils
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{
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public:
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/**
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* Possible values for any |aElementFlags| parameters. These may be
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* bitwise OR'd together.
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*/
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enum {
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/**
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* The element has a "model" attribute.
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*/
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ELEMENT_WITH_MODEL_ATTR = 1 << 0
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};
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/**
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* Initialize nsXFormsUtils.
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*/
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static NS_HIDDEN_(nsresult)
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Init();
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/**
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* Locate the model that is a parent of |aElement|. This method walks up the
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* content tree looking for the containing model.
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*/
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static NS_HIDDEN_(void)
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GetParentModel(nsIDOMElement *aElement, nsIDOMNode **aModel);
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/**
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* Find the evaluation context for an element.
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*
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* That is, the model it is bound to (|aModel|), and if applicable the
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* \<bind\> element that it uses (|aBindElement| and the context node
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* (|aContextNode|).
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*
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* @param aElement The element
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* @param aElementFlags Flags describing characteristics of aElement
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* @param aModel The \<model\> for the element
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* @param aBindElement The \<bind\> the element is bound to (if any)
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* @param aContextNode The context node for the element
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*/
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static NS_HIDDEN_(nsresult)
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GetNodeContext(nsIDOMElement *aElement,
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PRUint32 aElementFlags,
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nsIDOMNode **aModel,
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nsIDOMElement **aBindElement,
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nsIDOMElement **aContextNode,
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PRInt32 *aContextPosition = nsnull,
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PRInt32 *aContextSize = nsnull);
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/**
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* Locate the model for an element.
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*
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* @note Actually it is just a shortcut for GetNodeContext().
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*
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* @param aElement The element
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* @param aElementFlags Flags describing characteristics of aElement
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* @return The model
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*/
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static NS_HIDDEN_(already_AddRefed<nsIDOMNode>)
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GetModel(nsIDOMElement *aElement,
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PRUint32 aElementFlags = ELEMENT_WITH_MODEL_ATTR);
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/**
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* Evaluate a 'bind' or |aBindingAttr| attribute on |aElement|.
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* |aResultType| is used as the desired result type for the XPath evaluation.
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* The model and bind elements (if applicable) are located as part of this
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* evaluation, and are returned (addrefed) in |aModel| and |aBind|.
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*
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* The return value is an XPathResult as returned from
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* nsIDOMXPathEvaluator::Evaluate().
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*/
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static NS_HIDDEN_(already_AddRefed<nsIDOMXPathResult>)
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EvaluateNodeBinding(nsIDOMElement *aElement,
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PRUint32 aElementFlags,
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const nsString &aBindingAttr,
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const nsString &aDefaultRef,
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PRUint16 aResultType,
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nsIDOMNode **aModel,
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nsIDOMElement **aBind);
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/**
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* Given a bind element |aElement|, return the nodeset that it applies to.
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* |aResultType| is used as the desired result type for the XPath
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* evaluation.
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*/
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static NS_HIDDEN_(already_AddRefed<nsIDOMXPathResult>)
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EvaluateNodeset(nsIDOMElement *aElement, PRUint16 aResultType);
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/**
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* Given a bind element |aElement|, find the context node to be used
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* for evaluating its nodeset.
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*/
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static NS_HIDDEN_(already_AddRefed<nsIDOMNode>)
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FindBindContext(nsIDOMElement *aBindElement,
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nsIXFormsModelElement *aModelElement);
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/**
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* Convenience method for doing XPath evaluations. This gets a
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* nsIDOMXPathEvaluator from |aContextNode|'s ownerDocument, and calls
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* nsIDOMXPathEvaluator::Evalute using the given expression, context node,
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* namespace resolver, and result type.
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*/
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static NS_HIDDEN_(already_AddRefed<nsIDOMXPathResult>)
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EvaluateXPath(const nsAString &aExpression,
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nsIDOMNode *aContextNode,
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nsIDOMNode *aResolverNode,
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PRUint16 aResultType,
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PRInt32 aContextPosition = 1,
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PRInt32 aContextSize = 1);
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/**
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* Given a node in the instance data, get its string value according
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* to section 8.1.1 of the XForms specification.
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*/
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static NS_HIDDEN_(void) GetNodeValue(nsIDOMNode *aDataNode,
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nsString &aNodeValue);
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/**
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* Given a node in the instance data and a string, store the value according
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* to section 10.1.9 of the XForms specification.
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*/
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static NS_HIDDEN_(void) SetNodeValue(nsIDOMNode *aDataNode,
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const nsString &aNodeValue);
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/**
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* Convenience method for doing XPath evaluations to get string value
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* for an element.
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* Returns PR_TRUE if the evaluation succeeds.
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*/
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static NS_HIDDEN_(PRBool)
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GetSingleNodeBindingValue(nsIDOMElement* aElement, nsString& aValue);
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/**
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* Dispatch an XForms event.
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*/
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static NS_HIDDEN_(nsresult)
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DispatchEvent(nsIDOMNode* aTarget, nsXFormsEvent aEvent);
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/**
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* Returns PR_TRUE, if aEvent is an XForms event, and sets the values
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* of aCancelable and aBubbles parameters according to the event type.
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*/
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static NS_HIDDEN_(PRBool)
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IsXFormsEvent(const nsAString& aEvent,
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PRBool& aCancelable,
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PRBool& aBubbles);
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/**
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* Checks if aEvent is a predefined event and sets the values
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* of aCancelable and aBubbles parameters according to the event type.
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*/
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static NS_HIDDEN_(void)
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GetEventDefaults(const nsAString& aEvent,
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PRBool& aCancelable,
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PRBool& aBubbles);
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/**
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* Clone the set of IIDs in |aIIDList| into |aOutArray|.
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* |aOutCount| is set to |aIIDCount|.
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*/
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static NS_HIDDEN_(nsresult) CloneScriptingInterfaces(const nsIID *aIIDList,
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unsigned int aIIDCount,
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PRUint32 *aOutCount,
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nsIID ***aOutArray);
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/**
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* Returns the context for the element, if set by a parent node.
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*
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* Controls inheriting from nsIXFormsContextControl sets the context for its children.
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*
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* @param aElement The document element of the caller
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* @param aModel The model for |aElement| (if (!*aModel), it is set)
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* @param aContextNode The resulting context node
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* @param aContextPosition The resulting context position
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* @param aContextSize The resulting context size
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*/
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static NS_HIDDEN_(nsresult) FindParentContext(nsIDOMElement *aElement,
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nsIDOMNode **aModel,
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nsIDOMElement **aContextNode,
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PRInt32 *aContextPosition,
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PRInt32 *aContextSize);
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/**
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* @return true if aTestURI has the same origin as aBaseURI
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*/
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static NS_HIDDEN_(PRBool) CheckSameOrigin(nsIURI *aBaseURI,
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nsIURI *aTestURI);
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};
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#endif
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