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RetroZilla/extensions/xforms/nsXFormsControlStub.h
Ryan Nematz 2f2ae146c0 first commit
2015-10-20 23:03:22 -04:00

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/* -*- 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 <abeaufour@novell.com>
* Olli Pettay <Olli.Pettay@helsinki.fi>
*
* 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 "nsString.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 "nsIXTFBindableElementWrapper.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 nsXFormsControlStubBase : 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;
// nsIXFormsControl
NS_IMETHOD GetBoundNode(nsIDOMNode **aBoundNode);
NS_IMETHOD BindToModel(PRBool aSetBoundNode = PR_FALSE);
NS_IMETHOD GetDependencies(nsCOMArray<nsIDOMNode> **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);
nsresult Create(nsIXTFElementWrapper *aWrapper);
// for nsIXTFElement
nsresult HandleDefault(nsIDOMEvent *aEvent,
PRBool *aHandled);
nsresult OnDestroyed();
nsresult WillChangeDocument(nsIDOMDocument *aNewDocument);
nsresult DocumentChanged(nsIDOMDocument *aNewDocument);
nsresult WillChangeParent(nsIDOMElement *aNewParent);
nsresult ParentChanged(nsIDOMElement *aNewParent);
nsresult WillSetAttribute(nsIAtom *aName, const nsAString &aValue);
nsresult AttributeSet(nsIAtom *aName, const nsAString &aValue);
nsresult WillRemoveAttribute(nsIAtom *aName);
nsresult 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();
/**
* Get/Set the repeat state for the control. The repeat state indicates
* whether the control lives inside a context container, a repeat element,
* an itemset or non of the above.
*/
virtual nsRepeatState GetRepeatState();
virtual void SetRepeatState(nsRepeatState aState);
// nsIXFormsContextControl
NS_DECL_NSIXFORMSCONTEXTCONTROL
#ifdef DEBUG_smaug
virtual const char* Name() { return "[undefined]"; }
#endif
/** Constructor */
nsXFormsControlStubBase() :
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),
mHasParent(PR_FALSE),
mHasDoc(PR_FALSE),
mPreventLoop(PR_FALSE),
mUsesModelBinding(PR_FALSE),
mAppearDisabled(PR_FALSE),
mOnDeferredBindList(PR_FALSE),
mBindAttrsCount(0),
mRepeatState(eType_Unknown)
{};
protected:
/** The nsIXTFElementWrapper */
nsIDOMElement* mElement;
/** The node that the control is bound to. */
nsCOMPtr<nsIDOMNode> mBoundNode;
/** Array of nsIDOMNodes that the control depends on. */
nsCOMArray<nsIDOMNode> mDependencies;
/** The model for the control */
nsCOMPtr<nsIModelElementPrivate> mModel;
/** This event listener is used to create xforms-hint and xforms-help events. */
nsCOMPtr<nsIDOMEventListener> mEventListener;
/** State that tells whether control has a parent or not */
PRPackedBool mHasParent;
/** State that tells whether control has a parent or not */
PRPackedBool mHasDoc;
/** 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;
nsRepeatState mRepeatState;
/**
* List of repeats that the node binding depends on. This happens when using
* the index() function in the binding expression.
*/
nsCOMArray<nsIXFormsRepeatElement> 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<nsIXFormsControl> 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<nsIXFormsContextControl> 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);
/**
* This is called when the parent node for a XForms control changes.
* It checks the ancestors of the element and returns an nsRepeatState
* depending on the element's place in the document.
*
* @param aParent The new parent of the XForms control
*/
virtual nsRepeatState UpdateRepeatState(nsIDOMNode *aParent);
};
/**
* nsXFormsBindableControlStub inherits from nsXFormsBindableStub
*/
class nsXFormsBindableControlStub : public nsXFormsControlStubBase,
public nsXFormsBindableStub
{
public:
NS_DECL_ISUPPORTS_INHERITED
// nsIXTFBindableElement overrides
/** This sets the notification mask and initializes mElement */
NS_IMETHOD OnCreated(nsIXTFBindableElementWrapper *aWrapper)
{
nsresult rv = nsXFormsBindableStub::OnCreated(aWrapper);
return NS_SUCCEEDED(rv) ? nsXFormsControlStubBase::Create(aWrapper) : rv;
}
// nsIXTFElement overrides
NS_IMETHOD HandleDefault(nsIDOMEvent *aEvent,
PRBool *aHandled)
{
return nsXFormsControlStubBase::HandleDefault(aEvent, aHandled);
}
NS_IMETHOD OnDestroyed() {
return nsXFormsControlStubBase::OnDestroyed();
}
NS_IMETHOD WillChangeDocument(nsIDOMDocument *aNewDocument)
{
return nsXFormsControlStubBase::WillChangeDocument(aNewDocument);
}
NS_IMETHOD DocumentChanged(nsIDOMDocument *aNewDocument)
{
return nsXFormsControlStubBase::DocumentChanged(aNewDocument);
}
NS_IMETHOD WillChangeParent(nsIDOMElement *aNewParent)
{
return nsXFormsControlStubBase::WillChangeParent(aNewParent);
}
NS_IMETHOD ParentChanged(nsIDOMElement *aNewParent)
{
return nsXFormsControlStubBase::ParentChanged(aNewParent);
}
NS_IMETHOD WillSetAttribute(nsIAtom *aName, const nsAString &aValue)
{
return nsXFormsControlStubBase::WillSetAttribute(aName, aValue);
}
NS_IMETHOD AttributeSet(nsIAtom *aName, const nsAString &aValue)
{
return nsXFormsControlStubBase::AttributeSet(aName, aValue);
}
NS_IMETHOD WillRemoveAttribute(nsIAtom *aName)
{
return nsXFormsControlStubBase::WillRemoveAttribute(aName);
}
NS_IMETHOD AttributeRemoved(nsIAtom *aName)
{
return nsXFormsControlStubBase::AttributeRemoved(aName);
}
/** Constructor */
nsXFormsBindableControlStub() : nsXFormsControlStubBase() {};
};
#endif
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