зеркало из https://github.com/mozilla/gecko-dev.git
443 строки
16 KiB
C++
443 строки
16 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 "nsCOMArray.h"
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#include "nsIDOMNode.h"
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#include "nsIDOMXPathResult.h"
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#include "nsIModelElementPrivate.h"
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#include "nsIScriptError.h"
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#include "nsVoidArray.h"
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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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class nsIMutableArray;
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class nsIDOMEvent;
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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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#define NS_NAMESPACE_MOZ_XFORMS_TYPE "http://www.mozilla.org/projects/xforms/2005/type"
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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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* @note nsXFormsModelElement::SetSingleState() assumes a specific order of
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* the events from eEvent_Valid to eEvent_Disabled.
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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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eEvent_MozHintOff
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};
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struct EventData
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{
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const char *name;
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PRBool canCancel;
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PRBool canBubble;
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};
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extern const EventData sXFormsEventsEntries[42];
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/**
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* @todo The attribute names used on the elements to reflect the pseudo class
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* state until bug 271720 is landed. (XXX)
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*/
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extern const nsString kStateAttributes[8];
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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 |aBindElement|. This method walks
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* up the content tree looking for the containing model.
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*
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* @return Whether it's a reference to an outermost bind
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*/
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static NS_HIDDEN_(PRBool)
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GetParentModel(nsIDOMElement *aBindElement,
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nsIModelElementPrivate **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 aOuterBind Whether the \<bind\> is an outermost bind
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* @param aContextNode The context node for the element
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* @param aContextPosition The context position for the element
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* @param aContextSize The context size 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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nsIModelElementPrivate **aModel,
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nsIDOMElement **aBindElement,
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PRBool *aOuterBind,
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nsIDOMNode **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<nsIModelElementPrivate>)
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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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*
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* The model element (if applicable) is located as part of this evaluation,
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* and returned (addrefed) in |aModel|
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*
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* The return value is an XPathResult as returned from
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* nsIXFormsXPathEvaluator::Evaluate().
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*/
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static NS_HIDDEN_(nsresult)
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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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nsIModelElementPrivate **aModel,
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nsIDOMXPathResult **aResult,
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nsCOMArray<nsIDOMNode> *aDeps = nsnull,
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nsStringArray *aIndexesUsed = nsnull);
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/**
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* Convenience method for doing XPath evaluations. This gets a
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* nsIXFormsXPathEvaluator from |aContextNode|'s ownerDocument, and calls
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* nsIXFormsXPathEvaluator::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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nsCOMArray<nsIDOMNode> *aSet = nsnull,
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nsStringArray *aIndexesUsed = nsnull);
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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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nsAString &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. aDefaultActionEnabled is returned indicating
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* if the default action of the dispatched event was enabled.
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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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PRBool *aDefaultActionEnabled = nsnull);
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/**
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* Sets aEvent trusted if aRelatedNode is in chrome.
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* When dispatching events in chrome, they should be set trusted
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* because by default event listeners in chrome handle only trusted
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* events.
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* Should be called before any event dispatching in XForms.
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*/
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static NS_HIDDEN_(nsresult)
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SetEventTrusted(nsIDOMEvent* aEvent, nsIDOMNode* aRelatedNode);
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/**
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* Returns PR_TRUE unless aTarget is in chrome and aEvent is not trusted.
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* This should be used always before handling events. Otherwise if XForms
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* is used in chrome, it may try to handle events that can be synthesized
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* by untrusted content. I.e. content documents may create events using
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* document.createEvent() and then fire them using target.dispatchEvent();
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*/
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static NS_HIDDEN_(PRBool)
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EventHandlingAllowed(nsIDOMEvent* aEvent, nsIDOMNode* aTarget);
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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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nsIModelElementPrivate **aModel,
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nsIDOMNode **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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* @return true if aNode is element, its namespace URI is
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* "http://www.w3.org/2002/xforms" and its name is aName.
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*/
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static NS_HIDDEN_(PRBool) IsXFormsElement(nsIDOMNode* aNode,
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const nsAString& aName);
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/**
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* Returns true if the given element is an XForms label.
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*/
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static NS_HIDDEN_(PRBool) IsLabelElement(nsIDOMNode *aElement);
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/**
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* Tries to focus a form control and returns true if succeeds.
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*/
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static NS_HIDDEN_(PRBool) FocusControl(nsIDOMElement *aElement);
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/**
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* Sorts the array and removes duplicate entries
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*/
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static NS_HIDDEN_(void) MakeUniqueAndSort(nsCOMArray<nsIDOMNode> *aArray);
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/**
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* Returns the <xf:instance> for a given instance data node.
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*/
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static NS_HIDDEN_(nsresult) GetInstanceNodeForData(nsIDOMNode *aInstanceDataNode,
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nsIModelElementPrivate *aModel,
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nsIDOMNode **aInstanceNode);
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/**
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* This function takes an instance data node, finds the type bound to it, and
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* returns the seperated out type (integer) and namespace prefix (xsd).
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*/
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static NS_HIDDEN_(nsresult) ParseTypeFromNode(nsIDOMNode *aInstanceData,
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nsAString &aType,
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nsAString &aNSPrefix);
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/**
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* Outputs to the JavaScript console.
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*
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* @param aMessageName Name of string to output, which is loaded from
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xforms.properties
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* @param aParams Optional parameters for the loaded string
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* @param aParamLength Amount of params in aParams
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* @param aElement If set, is used to determine and output the
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location of the file the XForm is located in
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* @param aContext If set, the node is used to output what element
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caused the error
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* @param aErrorType Type of error in form of an nsIScriptError flag
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*/
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static NS_HIDDEN_(void) ReportError(const nsString &aMessageName,
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const PRUnichar **aParams,
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PRUint32 aParamLength,
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nsIDOMNode *aElement,
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nsIDOMNode *aContext,
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PRUint32 aErrorFlag = nsIScriptError::errorFlag);
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/**
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* Simple version of ReportError(), used when reporting without message
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* arguments and file location and node is taken from same element (or
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* nsnull).
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*
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* @param aMessageName Name of string
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* @param aElement Element to use for location and context
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* @param aErrorType Type of error in form of an nsIScriptError flag
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*/
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static NS_HIDDEN_(void) ReportError(const nsString &aMessageName,
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nsIDOMNode *aElement = nsnull,
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PRUint32 aErrorFlag = nsIScriptError::errorFlag)
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{
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nsXFormsUtils::ReportError(aMessageName, nsnull, 0, aElement, aElement, aErrorFlag);
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}
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/**
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* Returns whether the aDocument is ready to bind data (all instance documents
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* loaded).
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*
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* @param aDocument Document to check
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*/
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static NS_HIDDEN_(PRBool) IsDocumentReadyForBind(nsIDOMDocument *aDocument);
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/**
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* Retrieve an element by id, handling (cloned) elements inside repeats.
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*
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* @param aDoc The document to get element from
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* @param aId The id of the element
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* @param aOnlyXForms Only search for XForms elements
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* @param aCaller The caller (or rather the caller's DOM element),
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ignored if nsnull
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* @param aElement The element (or nsnull if not found)
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*/
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static NS_HIDDEN_(nsresult) GetElementById(nsIDOMDocument *aDoc,
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const nsAString &aId,
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const PRBool aOnlyXForms,
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nsIDOMElement *aCaller,
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nsIDOMElement **aElement);
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};
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#endif
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