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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 DocGroup_h
#define DocGroup_h
#include "mozilla/RefPtr.h"
#include "mozilla/dom/BrowsingContextGroup.h"
#include "mozilla/dom/HTMLSlotElement.h"
#include "nsIPrincipal.h"
#include "nsISupportsImpl.h"
#include "nsString.h"
#include "nsTHashSet.h"
#include "nsThreadUtils.h"
namespace mozilla {
class AbstractThread;
namespace dom {
class CustomElementReactionsStack;
class JSExecutionManager;
// DocGroup is the Gecko object for a "Similar-origin Window Agent" (the
// window-global component of an "Agent Cluster").
// https://html.spec.whatwg.org/multipage/webappapis.html#similar-origin-window-agent
//
// A DocGroup is shared between a series of window globals which are reachable
// from one-another (e.g. through `window.opener`, `window.parent` or
// `window.frames`), and are able to synchronously communicate with one-another,
// (either due to being same-origin, or by setting `document.domain`).
//
// NOTE: Similar to how the principal for a global is stored on a Document, the
// DocGroup for a window global is also attached to the corresponding Document
// object. This is required for certain features (such as the ArenaAllocator)
// which require the DocGroup before the nsGlobalWindowInner has been created.
//
// NOTE: DocGroup is not the source of truth for synchronous script access.
// Non-window globals, such as extension globals and system JS, may have
// synchronous access yet not be part of the DocGroup. The DocGroup should,
// however, align with web-visible synchronous script access boundaries.
class DocGroup final {
public:
NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(DocGroup)
NS_DECL_CYCLE_COLLECTION_NATIVE_CLASS(DocGroup)
static already_AddRefed<DocGroup> Create(
BrowsingContextGroup* aBrowsingContextGroup, const DocGroupKey& aKey);
void AssertMatches(const Document* aDocument) const;
const DocGroupKey& GetKey() const { return mKey; }
bool IsOriginKeyed() const { return mKey.mOriginKeyed; }
JSExecutionManager* GetExecutionManager() const { return mExecutionManager; }
void SetExecutionManager(JSExecutionManager*);
BrowsingContextGroup* GetBrowsingContextGroup() const {
return mBrowsingContextGroup;
}
mozilla::dom::DOMArena* ArenaAllocator() { return mArena; }
mozilla::dom::CustomElementReactionsStack* CustomElementReactionsStack();
// Adding documents to a DocGroup should be done through
// BrowsingContextGroup::AddDocument (which in turn calls
// DocGroup::AddDocument).
void AddDocument(Document* aDocument);
// Removing documents from a DocGroup should be done through
// BrowsingContextGroup::RemoveDocument(which in turn calls
// DocGroup::RemoveDocument).
void RemoveDocument(Document* aDocument);
// Return a pointer that can be continually checked to see if access to this
// DocGroup is valid. This pointer should live at least as long as the
// DocGroup.
bool* GetValidAccessPtr();
// Append aSlot to the list of signal slot list, and queue a mutation observer
// microtask.
void SignalSlotChange(HTMLSlotElement& aSlot);
nsTArray<RefPtr<HTMLSlotElement>> MoveSignalSlotList();
// List of DocGroups that has non-empty signal slot list.
static AutoTArray<RefPtr<DocGroup>, 2>* sPendingDocGroups;
// Returns true if any of its documents are active but not in the bfcache.
bool IsActive() const;
const nsID& AgentClusterId() const { return mAgentClusterId; }
bool IsEmpty() const { return mDocuments.IsEmpty(); }
private:
DocGroup(BrowsingContextGroup* aBrowsingContextGroup,
const DocGroupKey& aKey);
~DocGroup();
DocGroupKey mKey;
nsTArray<Document*> mDocuments;
RefPtr<mozilla::dom::CustomElementReactionsStack> mReactionsStack;
nsTArray<RefPtr<HTMLSlotElement>> mSignalSlotList;
RefPtr<BrowsingContextGroup> mBrowsingContextGroup;
// non-null if the JS execution for this docgroup is regulated with regards
// to worker threads. This should only be used when we are forcing serialized
// SAB access.
RefPtr<JSExecutionManager> mExecutionManager;
// Each DocGroup has a persisted agent cluster ID.
const nsID mAgentClusterId;
RefPtr<mozilla::dom::DOMArena> mArena;
};
} // namespace dom
} // namespace mozilla
#endif // defined(DocGroup_h)
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