зеркало из https://github.com/mozilla/gecko-dev.git
225 строки
8.1 KiB
C++
225 строки
8.1 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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*
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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 "nsString.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 "nsIDOMEventListener.h"
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#include "nsIModelElementPrivate.h"
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#include "nsIXFormsControl.h"
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#include "nsXFormsStubElement.h"
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#include "nsXFormsUtils.h"
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class nsIDOMEvent;
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class nsIDOMXPathResult;
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class nsIXTFXMLVisualWrapper;
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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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* It also inherits from nsXFormsXMLVisualStub, and overrides a couple of its
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* functions.
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*
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* @bug If a control has a model attribute, but no binding attributes we fail
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* to set this as the context for children. We need to return the contextnode
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* from EvaluateNodeBinding in that case, and return that in GetContext(). (XXX)
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* @see http://bugzilla.mozilla.org/show_bug.cgi?id=280366
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*/
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class nsXFormsControlStub : public nsIXFormsControl,
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public nsXFormsXMLVisualStub
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{
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public:
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NS_DECL_ISUPPORTS_INHERITED
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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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// nsIXFormsControl
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NS_IMETHOD GetBoundNode(nsIDOMNode **aBoundNode);
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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();
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NS_IMETHOD Bind();
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NS_IMETHOD TryFocus(PRBool* aOK);
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// nsIXTFXMLVisual overrides
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/** This sets the notification mask and initializes mElement */
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NS_IMETHOD OnCreated(nsIXTFXMLVisualWrapper *aWrapper);
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// nsIXTFElement overrides
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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 DocumentChanged(nsIDOMDocument *aNewDocument);
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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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// nsIXFormsContextControl
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NS_DECL_NSIXFORMSCONTEXTCONTROL
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/** Constructor */
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nsXFormsControlStub() :
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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_DOCUMENT_CHANGED |
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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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mHasParent(PR_FALSE),
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mBindAttrsCount(0)
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{};
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protected:
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/** The nsIXTFXMLVisualWrapper */
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nsCOMPtr<nsIDOMElement> mElement;
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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 that tells whether control has a parent or not */
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PRBool mHasParent;
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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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PRInt32 mBindAttrsCount;
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/** Returns the read only state of the control (ie. mBoundNode) */
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PRBool GetReadOnlyState();
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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 MDG (mMDG) and
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* binds the control to its 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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* Toggles a property on the control (readonly, relevant, etc.)
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*
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* @todo This needs to be implemented using pseudo-classes instead of
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* attributes (XXX)
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*/
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void ToggleProperty(const nsAString &aOn,
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const nsAString &aOff);
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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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* Removes all of the attributes that may have been added to the control due
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* to binding with an instance node.
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*/
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void ResetProperties();
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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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void MaybeBindAndRefresh(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 MaybeRemoveFromModel(nsIAtom *aName, const nsAString &aValue);
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};
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#endif
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