зеркало из https://github.com/mozilla/pjs.git
329 строки
12 KiB
C++
329 строки
12 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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* Novell, Inc.
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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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* Allan Beaufour <abeaufour@novell.com>
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* Olli Pettay <Olli.Pettay@helsinki.fi>
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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 nsXFormsControlStub_h_
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#define nsXFormsControlStub_h_
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#include "nsCOMPtr.h"
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#include "nsStringAPI.h"
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#include "nsIDOMElement.h"
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#include "nsIDOMNode.h"
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#include "nsIXTFElement.h"
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#include "nsXFormsAtoms.h"
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#include "nsIDOMEventListener.h"
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#include "nsIModelElementPrivate.h"
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#include "nsIXFormsControl.h"
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#include "nsIXFormsRepeatElement.h"
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#include "nsXFormsStubElement.h"
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#include "nsXFormsUtils.h"
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#include "nsIXTFElementWrapper.h"
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#include "nsIXFormsControlBase.h"
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class nsIDOMEvent;
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class nsIDOMXPathResult;
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/**
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* Common stub for all XForms controls that inherit from nsIXFormsControl and
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* is bound to an instance node.
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*/
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class nsXFormsControlStub : public virtual nsXFormsStubElement,
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public nsIXFormsControl
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{
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public:
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/** The standard notification flags set on nsIXTFElement */
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const PRUint32 kStandardNotificationMask;
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/**
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* The element flags for the controls passed to
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* nsXFormsUtils:EvaluateNodeBinding()
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*/
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const PRUint32 kElementFlags;
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NS_DECL_ISUPPORTS_INHERITED
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// nsIXFormsControl
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NS_IMETHOD GetBoundNode(nsIDOMNode **aBoundNode);
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NS_IMETHOD BindToModel(PRBool aSetBoundNode = PR_FALSE);
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NS_IMETHOD GetDependencies(nsCOMArray<nsIDOMNode> **aDependencies);
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NS_IMETHOD GetElement(nsIDOMElement **aElement);
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NS_IMETHOD ResetBoundNode(const nsString &aBindAttribute,
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PRUint16 aResultType,
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PRBool *aContextChanged);
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NS_IMETHOD Bind(PRBool *aContextChanged);
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NS_IMETHOD Refresh();
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NS_IMETHOD GetOnDeferredBindList(PRBool *onList);
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NS_IMETHOD SetOnDeferredBindList(PRBool putOnList);
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NS_IMETHOD TryFocus(PRBool* aOK);
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NS_IMETHOD IsEventTarget(PRBool *aOK);
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NS_IMETHOD GetUsesModelBinding(PRBool *aRes);
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NS_IMETHOD GetUsesSingleNodeBinding(PRBool *aRes);
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NS_IMETHOD GetDefaultIntrinsicState(PRInt32 *aRes);
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NS_IMETHOD GetDisabledIntrinsicState(PRInt32 *aRes);
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NS_IMETHOD RebindAndRefresh();
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NS_IMETHOD GetAbortedBindListContainer(nsIXFormsContextControl **aContainer);
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NS_IMETHOD SetAbortedBindListContainer(nsIXFormsContextControl *aContainer);
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// for nsIXTFElement
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NS_IMETHOD OnCreated(nsIXTFElementWrapper *aWrapper);
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NS_IMETHOD HandleDefault(nsIDOMEvent *aEvent,
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PRBool *aHandled);
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NS_IMETHOD OnDestroyed();
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NS_IMETHOD WillChangeDocument(nsIDOMDocument *aNewDocument);
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NS_IMETHOD DocumentChanged(nsIDOMDocument *aNewDocument);
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NS_IMETHOD WillChangeParent(nsIDOMElement *aNewParent);
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NS_IMETHOD ParentChanged(nsIDOMElement *aNewParent);
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NS_IMETHOD WillSetAttribute(nsIAtom *aName, const nsAString &aValue);
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NS_IMETHOD AttributeSet(nsIAtom *aName, const nsAString &aValue);
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NS_IMETHOD WillRemoveAttribute(nsIAtom *aName);
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NS_IMETHOD AttributeRemoved(nsIAtom *aName);
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/**
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* This function manages the mBindAttrsCount value. mBindAttrsCount will
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* be incremented if a single node binding attribute is specified that isn't
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* currently on the control AND aValue isn't empty. Otherwise, if the control
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* already contains this attribute with a non-empty value and aValue is empty,
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* then mBindAttrsCount is decremented.
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*
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* aName - Atom of the single node binding attribute ('bind', 'ref', etc.).
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* Using an atom to make it a tad harder to misuse by passing in
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* any old string, for instance. Since different controls may have
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* different binding attrs, we do NO validation on the attr. We
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* assume that the caller is smart enough to only send us a
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* binding attr atom.
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* aValue - The string value that the SNB attribute is being set to.
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*
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*/
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void AddRemoveSNBAttr(nsIAtom *aName, const nsAString &aValue);
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/**
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* This function is overridden by controls that are restricted in the
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* type of content that may be bound to the control. For example,
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* xf:input may only be bound to simpleContent.
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*
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*/
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virtual PRBool IsContentAllowed();
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/**
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* This function determines if the content to which the control is being
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* bound is complex; ie contains Element children.
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*
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*/
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virtual PRBool IsContentComplex();
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// nsIXFormsContextControl
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NS_DECL_NSIXFORMSCONTEXTCONTROL
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#ifdef DEBUG_smaug
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virtual const char* Name() { return "[undefined]"; }
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#endif
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/** Constructor */
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nsXFormsControlStub() :
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nsXFormsStubElement(),
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kStandardNotificationMask(nsIXTFElement::NOTIFY_WILL_SET_ATTRIBUTE |
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nsIXTFElement::NOTIFY_ATTRIBUTE_SET |
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nsIXTFElement::NOTIFY_WILL_REMOVE_ATTRIBUTE |
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nsIXTFElement::NOTIFY_ATTRIBUTE_REMOVED |
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nsIXTFElement::NOTIFY_WILL_CHANGE_DOCUMENT |
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nsIXTFElement::NOTIFY_DOCUMENT_CHANGED |
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nsIXTFElement::NOTIFY_WILL_CHANGE_PARENT |
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nsIXTFElement::NOTIFY_PARENT_CHANGED |
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nsIXTFElement::NOTIFY_HANDLE_DEFAULT),
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kElementFlags(nsXFormsUtils::ELEMENT_WITH_MODEL_ATTR),
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mPreventLoop(PR_FALSE),
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mUsesModelBinding(PR_FALSE),
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mAppearDisabled(PR_FALSE),
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mOnDeferredBindList(PR_FALSE),
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mBindAttrsCount(0)
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{};
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protected:
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/** The node that the control is bound to. */
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nsCOMPtr<nsIDOMNode> mBoundNode;
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/** Array of nsIDOMNodes that the control depends on. */
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nsCOMArray<nsIDOMNode> mDependencies;
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/** The model for the control */
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nsCOMPtr<nsIModelElementPrivate> mModel;
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/** This event listener is used to create xforms-hint and xforms-help events. */
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nsCOMPtr<nsIDOMEventListener> mEventListener;
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/** State to prevent infinite loop when generating and handling xforms-next
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* and xforms-previous events
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*/
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PRPackedBool mPreventLoop;
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/**
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* Does the control use a model bind? That is, does it have a @bind.
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*/
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PRPackedBool mUsesModelBinding;
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/**
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* Should the control appear disabled. This is f.x. used when a valid single
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* node binding is not pointing to an instance data node.
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*/
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PRPackedBool mAppearDisabled;
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/**
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* Indicates whether this control is already on the deferred bind list
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*/
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PRPackedBool mOnDeferredBindList;
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/**
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* Used to keep track of whether this control has any single node binding
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* attributes.
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*/
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PRInt8 mBindAttrsCount;
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/**
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* List of repeats that the node binding depends on. This happens when using
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* the index() function in the binding expression.
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*/
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nsCOMArray<nsIXFormsRepeatElement> mIndexesUsed;
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/**
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* List of XForms elements contained by this control who tried to bind
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* and couldn't because this control wasn't ready to bind, yet. This means
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* that these contained nodes couldn't bind because they could be potentially
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* using this control's bound node as a context node. When this control
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* is ready to bind and successfully binds, then this list will be processed.
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* And in turn, if these controls contain controls on THEIR mAbortedBindList,
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* then they will be similarly processed.
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*/
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nsCOMArray<nsIXFormsControl> mAbortedBindList;
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/**
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* The control that contains the aborted bind list that this control is on.
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* A control should never be on more than one list at a time.
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*/
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nsCOMPtr<nsIXFormsContextControl> mAbortedBindListContainer;
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/**
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* Does control have a binding attribute?
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*/
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PRBool HasBindingAttribute() const { return mBindAttrsCount != 0; };
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/** Returns the relevant state of the control */
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PRBool GetRelevantState();
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/**
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* Processes the node binding of a control, get the current Model (mModel)
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* and binds the control to it.
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*
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* @note Will return NS_OK_XFORMS_DEFERRED if the binding is being
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* deferred.
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*
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* @param aBindingAttr The default binding attribute
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* @param aResultType The XPath result type requested
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* @param aResult The XPath result
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* @param aModel The model
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*/
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nsresult
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ProcessNodeBinding(const nsString &aBindingAttr,
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PRUint16 aResultType,
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nsIDOMXPathResult **aResult,
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nsIModelElementPrivate **aModel = nsnull);
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/**
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* Reset (and reinitialize) the event listener, which is used to create
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* xforms-hint and xforms-help events.
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*/
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void ResetHelpAndHint(PRBool aInitialize);
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/**
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* Checks whether an attribute is a binding attribute for the control. This
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* should be overriden by controls that have "non-standard" binding
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* attributes.
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*
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* @param aAttr The attribute to check.
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*/
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virtual PRBool IsBindingAttribute(const nsIAtom *aAttr) const;
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/**
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* Causes Bind() and Refresh() to be called if aName is the atom of a
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* single node binding attribute for this control. Called by AttributeSet
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* and AttributeRemoved.
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*/
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virtual void AfterSetAttribute(nsIAtom *aName);
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/**
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* Removes this control from its model's list of controls if a single node
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* binding attribute is removed. Called by WillSetAttribute and
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* WillRemoveAttribute.
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*
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* @param aName - atom of the attribute being changed
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* @param aValue - value that the attribute is being changed to.
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*/
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void BeforeSetAttribute(nsIAtom *aName, const nsAString &aValue);
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/** Removes the index change event listeners */
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void RemoveIndexListeners();
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/**
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* Forces detaching from the model.
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*
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* @param aRebind Try rebinding to a new model?
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*/
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nsresult ForceModelDetach(PRBool aRebind);
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/**
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* Adds the form control to the model, if the model has changed.
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*
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* @param aOldModel The previous model the control was bound to
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* @param aParent The parent XForms control
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*/
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nsresult MaybeAddToModel(nsIModelElementPrivate *aOldModel,
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nsIXFormsControl *aParent);
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/**
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* Returns the nsISchemaBuiltinType of the node to which this element is
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* bound.
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*/
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nsresult GetBoundBuiltinType(PRUint16 *aBuiltinType);
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};
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#endif
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