mirror of
https://github.com/classilla/tenfourfox.git
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187 lines
6.3 KiB
C
187 lines
6.3 KiB
C
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsXBLBinding_h_
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#define nsXBLBinding_h_
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#include "nsXBLService.h"
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#include "nsCOMPtr.h"
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#include "nsAutoPtr.h"
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#include "nsINodeList.h"
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#include "nsIStyleRuleProcessor.h"
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#include "nsClassHashtable.h"
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#include "nsTArray.h"
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#include "nsCycleCollectionParticipant.h"
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#include "nsISupportsImpl.h"
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#include "js/TypeDecls.h"
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class nsXBLPrototypeBinding;
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class nsIContent;
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class nsIAtom;
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class nsIDocument;
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namespace mozilla {
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namespace dom {
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class ShadowRoot;
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class XBLChildrenElement;
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} // namespace dom
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} // namespace mozilla
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class nsAnonymousContentList;
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// *********************************************************************/
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// The XBLBinding class
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class nsXBLBinding final
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{
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public:
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explicit nsXBLBinding(nsXBLPrototypeBinding* aProtoBinding);
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nsXBLBinding(mozilla::dom::ShadowRoot* aShadowRoot, nsXBLPrototypeBinding* aProtoBinding);
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/**
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* XBLBindings are refcounted. They are held onto in 3 ways:
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* 1. The binding manager's binding table holds onto all bindings that are
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* currently attached to a content node.
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* 2. Bindings hold onto their base binding. This is important since
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* the base binding itself may not be attached to anything.
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* 3. The binding manager holds an additional reference to bindings
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* which are queued to fire their constructors.
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*/
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NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(nsXBLBinding)
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NS_DECL_CYCLE_COLLECTION_NATIVE_CLASS(nsXBLBinding)
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nsXBLPrototypeBinding* PrototypeBinding() const { return mPrototypeBinding; }
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nsIContent* GetAnonymousContent() { return mContent.get(); }
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nsXBLBinding* GetBindingWithContent();
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nsXBLBinding* GetBaseBinding() const { return mNextBinding; }
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void SetBaseBinding(nsXBLBinding *aBinding);
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nsIContent* GetBoundElement() { return mBoundElement; }
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void SetBoundElement(nsIContent *aElement);
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/*
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* Does a lookup for a method or attribute provided by one of the bindings'
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* prototype implementation. If found, |desc| will be set up appropriately,
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* and wrapped into cx->compartment.
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*
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* May only be called when XBL code is being run in a separate scope, because
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* otherwise we don't have untainted data with which to do a proper lookup.
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*/
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bool LookupMember(JSContext* aCx, JS::Handle<jsid> aId,
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JS::MutableHandle<JSPropertyDescriptor> aDesc);
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/*
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* Determines whether the binding has a field with the given name.
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*/
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bool HasField(nsString& aName);
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protected:
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~nsXBLBinding();
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/*
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* Internal version. Requires that aCx is in appropriate xbl scope.
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*/
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bool LookupMemberInternal(JSContext* aCx, nsString& aName,
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JS::Handle<jsid> aNameAsId,
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JS::MutableHandle<JSPropertyDescriptor> aDesc,
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JS::Handle<JSObject*> aXBLScope);
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public:
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void MarkForDeath();
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bool MarkedForDeath() const { return mMarkedForDeath; }
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bool HasStyleSheets() const;
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bool InheritsStyle() const;
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bool ImplementsInterface(REFNSIID aIID) const;
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void GenerateAnonymousContent();
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void InstallAnonymousContent(nsIContent* aAnonParent, nsIContent* aElement,
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bool aNativeAnon);
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static void UninstallAnonymousContent(nsIDocument* aDocument,
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nsIContent* aAnonParent);
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void InstallEventHandlers();
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nsresult InstallImplementation();
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void ExecuteAttachedHandler();
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void ExecuteDetachedHandler();
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void UnhookEventHandlers();
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nsIAtom* GetBaseTag(int32_t* aNameSpaceID);
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nsXBLBinding* RootBinding();
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// Resolve all the fields for this binding and all ancestor bindings on the
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// object |obj|. False return means a JS exception was set.
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bool ResolveAllFields(JSContext *cx, JS::Handle<JSObject*> obj) const;
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void AttributeChanged(nsIAtom* aAttribute, int32_t aNameSpaceID,
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bool aRemoveFlag, bool aNotify);
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void ChangeDocument(nsIDocument* aOldDocument, nsIDocument* aNewDocument);
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void WalkRules(nsIStyleRuleProcessor::EnumFunc aFunc, void* aData);
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static nsresult DoInitJSClass(JSContext *cx, JS::Handle<JSObject*> obj,
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const nsAFlatString& aClassName,
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nsXBLPrototypeBinding* aProtoBinding,
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JS::MutableHandle<JSObject*> aClassObject,
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bool* aNew);
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bool AllowScripts();
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mozilla::dom::XBLChildrenElement* FindInsertionPointFor(nsIContent* aChild);
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bool HasFilteredInsertionPoints()
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{
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return !mInsertionPoints.IsEmpty();
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}
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mozilla::dom::XBLChildrenElement* GetDefaultInsertionPoint()
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{
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return mDefaultInsertionPoint;
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}
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// Removes all inserted node from <xbl:children> insertion points under us.
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void ClearInsertionPoints();
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// Returns a live node list that iterates over the anonymous nodes generated
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// by this binding.
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nsAnonymousContentList* GetAnonymousNodeList();
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// MEMBER VARIABLES
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protected:
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bool mMarkedForDeath;
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bool mUsingContentXBLScope;
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bool mIsShadowRootBinding;
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nsXBLPrototypeBinding* mPrototypeBinding; // Weak, but we're holding a ref to the docinfo
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nsCOMPtr<nsIContent> mContent; // Strong. Our anonymous content stays around with us.
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RefPtr<nsXBLBinding> mNextBinding; // Strong. The derived binding owns the base class bindings.
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nsIContent* mBoundElement; // [WEAK] We have a reference, but we don't own it.
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// The <xbl:children> elements that we found in our <xbl:content> when we
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// processed this binding. The default insertion point has no includes
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// attribute and all other insertion points must have at least one includes
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// attribute. These points must be up-to-date with respect to their parent's
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// children, even if their parent has another binding attached to it,
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// preventing us from rendering their contents directly.
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RefPtr<mozilla::dom::XBLChildrenElement> mDefaultInsertionPoint;
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nsTArray<RefPtr<mozilla::dom::XBLChildrenElement> > mInsertionPoints;
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RefPtr<nsAnonymousContentList> mAnonymousContentList;
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mozilla::dom::XBLChildrenElement* FindInsertionPointForInternal(nsIContent* aChild);
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};
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#endif // nsXBLBinding_h_
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