/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* ***** BEGIN LICENSE BLOCK ***** * Version: MPL 1.1/GPL 2.0/LGPL 2.1 * * The contents of this file are subject to the Mozilla Public License Version * 1.1 (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * http://www.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is Mozilla XForms support. * * The Initial Developer of the Original Code is * Novell, Inc. * Portions created by the Initial Developer are Copyright (C) 2004 * the Initial Developer. All Rights Reserved. * * Contributor(s): * Allan Beaufour * Olli Pettay * * Alternatively, the contents of this file may be used under the terms of * either the GNU General Public License Version 2 or later (the "GPL"), or * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the MPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the MPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** */ #ifndef nsXFormsControlStub_h_ #define nsXFormsControlStub_h_ #include "nsCOMPtr.h" #include "nsStringAPI.h" #include "nsIDOMElement.h" #include "nsIDOMNode.h" #include "nsIXTFElement.h" #include "nsXFormsAtoms.h" #include "nsIDOMEventListener.h" #include "nsIModelElementPrivate.h" #include "nsIXFormsControl.h" #include "nsIXFormsRepeatElement.h" #include "nsXFormsStubElement.h" #include "nsXFormsUtils.h" #include "nsIXTFElementWrapper.h" #include "nsIXFormsControlBase.h" class nsIDOMEvent; class nsIDOMXPathResult; /** * Common stub for all XForms controls that inherit from nsIXFormsControl and * is bound to an instance node. */ class nsXFormsControlStub : public virtual nsXFormsStubElement, public nsIXFormsControl { public: /** The standard notification flags set on nsIXTFElement */ const PRUint32 kStandardNotificationMask; /** * The element flags for the controls passed to * nsXFormsUtils:EvaluateNodeBinding() */ const PRUint32 kElementFlags; NS_DECL_ISUPPORTS_INHERITED // nsIXFormsControl NS_IMETHOD GetBoundNode(nsIDOMNode **aBoundNode); NS_IMETHOD BindToModel(PRBool aSetBoundNode = PR_FALSE); NS_IMETHOD GetDependencies(nsCOMArray **aDependencies); NS_IMETHOD GetElement(nsIDOMElement **aElement); NS_IMETHOD ResetBoundNode(const nsString &aBindAttribute, PRUint16 aResultType, PRBool *aContextChanged); NS_IMETHOD Bind(PRBool *aContextChanged); NS_IMETHOD Refresh(); NS_IMETHOD GetOnDeferredBindList(PRBool *onList); NS_IMETHOD SetOnDeferredBindList(PRBool putOnList); NS_IMETHOD TryFocus(PRBool* aOK); NS_IMETHOD IsEventTarget(PRBool *aOK); NS_IMETHOD GetUsesModelBinding(PRBool *aRes); NS_IMETHOD GetUsesSingleNodeBinding(PRBool *aRes); NS_IMETHOD GetDefaultIntrinsicState(PRInt32 *aRes); NS_IMETHOD GetDisabledIntrinsicState(PRInt32 *aRes); NS_IMETHOD RebindAndRefresh(); NS_IMETHOD GetAbortedBindListContainer(nsIXFormsContextControl **aContainer); NS_IMETHOD SetAbortedBindListContainer(nsIXFormsContextControl *aContainer); // for nsIXTFElement NS_IMETHOD OnCreated(nsIXTFElementWrapper *aWrapper); NS_IMETHOD HandleDefault(nsIDOMEvent *aEvent, PRBool *aHandled); NS_IMETHOD OnDestroyed(); NS_IMETHOD WillChangeDocument(nsIDOMDocument *aNewDocument); NS_IMETHOD DocumentChanged(nsIDOMDocument *aNewDocument); NS_IMETHOD WillChangeParent(nsIDOMElement *aNewParent); NS_IMETHOD ParentChanged(nsIDOMElement *aNewParent); NS_IMETHOD WillSetAttribute(nsIAtom *aName, const nsAString &aValue); NS_IMETHOD AttributeSet(nsIAtom *aName, const nsAString &aValue); NS_IMETHOD WillRemoveAttribute(nsIAtom *aName); NS_IMETHOD AttributeRemoved(nsIAtom *aName); /** * This function manages the mBindAttrsCount value. mBindAttrsCount will * be incremented if a single node binding attribute is specified that isn't * currently on the control AND aValue isn't empty. Otherwise, if the control * already contains this attribute with a non-empty value and aValue is empty, * then mBindAttrsCount is decremented. * * aName - Atom of the single node binding attribute ('bind', 'ref', etc.). * Using an atom to make it a tad harder to misuse by passing in * any old string, for instance. Since different controls may have * different binding attrs, we do NO validation on the attr. We * assume that the caller is smart enough to only send us a * binding attr atom. * aValue - The string value that the SNB attribute is being set to. * */ void AddRemoveSNBAttr(nsIAtom *aName, const nsAString &aValue); /** * This function is overridden by controls that are restricted in the * type of content that may be bound to the control. For example, * xf:input may only be bound to simpleContent. * */ virtual PRBool IsContentAllowed(); /** * This function determines if the content to which the control is being * bound is complex; ie contains Element children. * */ virtual PRBool IsContentComplex(); // nsIXFormsContextControl NS_DECL_NSIXFORMSCONTEXTCONTROL #ifdef DEBUG_smaug virtual const char* Name() { return "[undefined]"; } #endif /** Constructor */ nsXFormsControlStub() : nsXFormsStubElement(), kStandardNotificationMask(nsIXTFElement::NOTIFY_WILL_SET_ATTRIBUTE | nsIXTFElement::NOTIFY_ATTRIBUTE_SET | nsIXTFElement::NOTIFY_WILL_REMOVE_ATTRIBUTE | nsIXTFElement::NOTIFY_ATTRIBUTE_REMOVED | nsIXTFElement::NOTIFY_WILL_CHANGE_DOCUMENT | nsIXTFElement::NOTIFY_DOCUMENT_CHANGED | nsIXTFElement::NOTIFY_WILL_CHANGE_PARENT | nsIXTFElement::NOTIFY_PARENT_CHANGED | nsIXTFElement::NOTIFY_HANDLE_DEFAULT), kElementFlags(nsXFormsUtils::ELEMENT_WITH_MODEL_ATTR), mPreventLoop(PR_FALSE), mUsesModelBinding(PR_FALSE), mAppearDisabled(PR_FALSE), mOnDeferredBindList(PR_FALSE), mBindAttrsCount(0) {}; protected: /** The node that the control is bound to. */ nsCOMPtr mBoundNode; /** Array of nsIDOMNodes that the control depends on. */ nsCOMArray mDependencies; /** The model for the control */ nsCOMPtr mModel; /** This event listener is used to create xforms-hint and xforms-help events. */ nsCOMPtr mEventListener; /** State to prevent infinite loop when generating and handling xforms-next * and xforms-previous events */ PRPackedBool mPreventLoop; /** * Does the control use a model bind? That is, does it have a @bind. */ PRPackedBool mUsesModelBinding; /** * Should the control appear disabled. This is f.x. used when a valid single * node binding is not pointing to an instance data node. */ PRPackedBool mAppearDisabled; /** * Indicates whether this control is already on the deferred bind list */ PRPackedBool mOnDeferredBindList; /** * Used to keep track of whether this control has any single node binding * attributes. */ PRInt8 mBindAttrsCount; /** * List of repeats that the node binding depends on. This happens when using * the index() function in the binding expression. */ nsCOMArray mIndexesUsed; /** * List of XForms elements contained by this control who tried to bind * and couldn't because this control wasn't ready to bind, yet. This means * that these contained nodes couldn't bind because they could be potentially * using this control's bound node as a context node. When this control * is ready to bind and successfully binds, then this list will be processed. * And in turn, if these controls contain controls on THEIR mAbortedBindList, * then they will be similarly processed. */ nsCOMArray mAbortedBindList; /** * The control that contains the aborted bind list that this control is on. * A control should never be on more than one list at a time. */ nsCOMPtr mAbortedBindListContainer; /** * Does control have a binding attribute? */ PRBool HasBindingAttribute() const { return mBindAttrsCount != 0; }; /** Returns the relevant state of the control */ PRBool GetRelevantState(); /** * Processes the node binding of a control, get the current Model (mModel) * and binds the control to it. * * @note Will return NS_OK_XFORMS_DEFERRED if the binding is being * deferred. * * @param aBindingAttr The default binding attribute * @param aResultType The XPath result type requested * @param aResult The XPath result * @param aModel The model */ nsresult ProcessNodeBinding(const nsString &aBindingAttr, PRUint16 aResultType, nsIDOMXPathResult **aResult, nsIModelElementPrivate **aModel = nsnull); /** * Reset (and reinitialize) the event listener, which is used to create * xforms-hint and xforms-help events. */ void ResetHelpAndHint(PRBool aInitialize); /** * Checks whether an attribute is a binding attribute for the control. This * should be overriden by controls that have "non-standard" binding * attributes. * * @param aAttr The attribute to check. */ virtual PRBool IsBindingAttribute(const nsIAtom *aAttr) const; /** * Causes Bind() and Refresh() to be called if aName is the atom of a * single node binding attribute for this control. Called by AttributeSet * and AttributeRemoved. */ virtual void AfterSetAttribute(nsIAtom *aName); /** * Removes this control from its model's list of controls if a single node * binding attribute is removed. Called by WillSetAttribute and * WillRemoveAttribute. * * @param aName - atom of the attribute being changed * @param aValue - value that the attribute is being changed to. */ void BeforeSetAttribute(nsIAtom *aName, const nsAString &aValue); /** Removes the index change event listeners */ void RemoveIndexListeners(); /** * Forces detaching from the model. * * @param aRebind Try rebinding to a new model? */ nsresult ForceModelDetach(PRBool aRebind); /** * Adds the form control to the model, if the model has changed. * * @param aOldModel The previous model the control was bound to * @param aParent The parent XForms control */ nsresult MaybeAddToModel(nsIModelElementPrivate *aOldModel, nsIXFormsControl *aParent); /** * Returns the nsISchemaBuiltinType of the node to which this element is * bound. */ nsresult GetBoundBuiltinType(PRUint16 *aBuiltinType); }; #endif