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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef nsXBLBinding_h_
#define nsXBLBinding_h_
#include "nsXBLService.h"
#include "nsCOMPtr.h"
#include "nsINodeList.h"
#include "nsIStyleRuleProcessor.h"
#include "nsClassHashtable.h"
#include "nsTArray.h"
#include "nsCycleCollectionParticipant.h"
#include "nsISupportsImpl.h"
#include "js/TypeDecls.h"
class nsXBLPrototypeBinding;
class nsIContent;
class nsIAtom;
class nsIDocument;
namespace mozilla {
namespace dom {
class ShadowRoot;
class XBLChildrenElement;
} // namespace dom
} // namespace mozilla
class nsAnonymousContentList;
// *********************************************************************/
// The XBLBinding class
class nsXBLBinding final
{
public:
explicit nsXBLBinding(nsXBLPrototypeBinding* aProtoBinding);
nsXBLBinding(mozilla::dom::ShadowRoot* aShadowRoot, nsXBLPrototypeBinding* aProtoBinding);
/**
* XBLBindings are refcounted. They are held onto in 3 ways:
* 1. The binding manager's binding table holds onto all bindings that are
* currently attached to a content node.
* 2. Bindings hold onto their base binding. This is important since
* the base binding itself may not be attached to anything.
* 3. The binding manager holds an additional reference to bindings
* which are queued to fire their constructors.
*/
NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(nsXBLBinding)
NS_DECL_CYCLE_COLLECTION_NATIVE_CLASS(nsXBLBinding)
nsXBLPrototypeBinding* PrototypeBinding() const { return mPrototypeBinding; }
nsIContent* GetAnonymousContent() { return mContent.get(); }
nsXBLBinding* GetBindingWithContent();
nsXBLBinding* GetBaseBinding() const { return mNextBinding; }
void SetBaseBinding(nsXBLBinding *aBinding);
nsIContent* GetBoundElement() { return mBoundElement; }
void SetBoundElement(nsIContent *aElement);
/*
* Does a lookup for a method or attribute provided by one of the bindings'
* prototype implementation. If found, |desc| will be set up appropriately,
* and wrapped into cx->compartment.
*
* May only be called when XBL code is being run in a separate scope, because
* otherwise we don't have untainted data with which to do a proper lookup.
*/
bool LookupMember(JSContext* aCx, JS::Handle<jsid> aId,
JS::MutableHandle<JS::PropertyDescriptor> aDesc);
/*
* Determines whether the binding has a field with the given name.
*/
bool HasField(nsString& aName);
protected:
~nsXBLBinding();
/*
* Internal version. Requires that aCx is in appropriate xbl scope.
*/
bool LookupMemberInternal(JSContext* aCx, nsString& aName,
JS::Handle<jsid> aNameAsId,
JS::MutableHandle<JS::PropertyDescriptor> aDesc,
JS::Handle<JSObject*> aXBLScope);
public:
void MarkForDeath();
bool MarkedForDeath() const { return mMarkedForDeath; }
bool HasStyleSheets() const;
bool InheritsStyle() const;
bool ImplementsInterface(REFNSIID aIID) const;
void GenerateAnonymousContent();
void InstallAnonymousContent(nsIContent* aAnonParent, nsIContent* aElement,
bool aNativeAnon);
static void UninstallAnonymousContent(nsIDocument* aDocument,
nsIContent* aAnonParent);
void InstallEventHandlers();
nsresult InstallImplementation();
void ExecuteAttachedHandler();
void ExecuteDetachedHandler();
void UnhookEventHandlers();
nsIAtom* GetBaseTag(int32_t* aNameSpaceID);
nsXBLBinding* RootBinding();
// Resolve all the fields for this binding and all ancestor bindings on the
// object |obj|. False return means a JS exception was set.
bool ResolveAllFields(JSContext *cx, JS::Handle<JSObject*> obj) const;
void AttributeChanged(nsIAtom* aAttribute, int32_t aNameSpaceID,
bool aRemoveFlag, bool aNotify);
void ChangeDocument(nsIDocument* aOldDocument, nsIDocument* aNewDocument);
void WalkRules(nsIStyleRuleProcessor::EnumFunc aFunc, void* aData);
static nsresult DoInitJSClass(JSContext *cx, JS::Handle<JSObject*> obj,
const nsAFlatString& aClassName,
nsXBLPrototypeBinding* aProtoBinding,
JS::MutableHandle<JSObject*> aClassObject,
bool* aNew);
bool AllowScripts();
mozilla::dom::XBLChildrenElement* FindInsertionPointFor(nsIContent* aChild);
bool HasFilteredInsertionPoints()
{
return !mInsertionPoints.IsEmpty();
}
mozilla::dom::XBLChildrenElement* GetDefaultInsertionPoint()
{
return mDefaultInsertionPoint;
}
// Removes all inserted node from <xbl:children> insertion points under us.
void ClearInsertionPoints();
// Returns a live node list that iterates over the anonymous nodes generated
// by this binding.
nsAnonymousContentList* GetAnonymousNodeList();
nsIURI* GetSourceDocURI();
// MEMBER VARIABLES
protected:
bool mMarkedForDeath;
bool mUsingContentXBLScope;
bool mIsShadowRootBinding;
nsXBLPrototypeBinding* mPrototypeBinding; // Weak, but we're holding a ref to the docinfo
nsCOMPtr<nsIContent> mContent; // Strong. Our anonymous content stays around with us.
RefPtr<nsXBLBinding> mNextBinding; // Strong. The derived binding owns the base class bindings.
nsIContent* mBoundElement; // [WEAK] We have a reference, but we don't own it.
// The <xbl:children> elements that we found in our <xbl:content> when we
// processed this binding. The default insertion point has no includes
// attribute and all other insertion points must have at least one includes
// attribute. These points must be up-to-date with respect to their parent's
// children, even if their parent has another binding attached to it,
// preventing us from rendering their contents directly.
RefPtr<mozilla::dom::XBLChildrenElement> mDefaultInsertionPoint;
nsTArray<RefPtr<mozilla::dom::XBLChildrenElement> > mInsertionPoints;
RefPtr<nsAnonymousContentList> mAnonymousContentList;
mozilla::dom::XBLChildrenElement* FindInsertionPointForInternal(nsIContent* aChild);
};
#endif // nsXBLBinding_h_
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