gecko-dev/dom/base/DocGroup.h
Emilio Cobos Álvarez bc958c264f Bug 1445392: Make HTMLSlotElement slot change event stuff not linear. r=smaug
Also fix refcount churn in nsDOMMutationObserver and such.

MozReview-Commit-ID: GwEB0LZY7Ss
2018-05-08 16:10:27 +02:00

143 lines
4.3 KiB
C++

/* -*- 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 "nsISupportsImpl.h"
#include "nsIPrincipal.h"
#include "nsTHashtable.h"
#include "nsString.h"
#include "mozilla/dom/TabGroup.h"
#include "mozilla/RefPtr.h"
#include "mozilla/dom/CustomElementRegistry.h"
#include "mozilla/dom/HTMLSlotElement.h"
#include "mozilla/PerformanceCounter.h"
namespace mozilla {
class AbstractThread;
namespace dom {
class PerformanceInfo;
// Two browsing contexts are considered "related" if they are reachable from one
// another through window.opener, window.parent, or window.frames. This is the
// spec concept of a "unit of related browsing contexts"
//
// Two browsing contexts are considered "similar-origin" if they can be made to
// have the same origin by setting document.domain. This is the spec concept of
// a "unit of similar-origin related browsing contexts"
//
// A TabGroup is a set of browsing contexts which are all "related". Within a
// TabGroup, browsing contexts are broken into "similar-origin" DocGroups. In
// more detail, a DocGroup is actually a collection of documents, and a
// TabGroup is a collection of DocGroups. A TabGroup typically will contain
// (through its DocGroups) the documents from one or more tabs related by
// window.opener. A DocGroup is a member of exactly one TabGroup.
class DocGroup final
{
public:
typedef nsTArray<nsIDocument*>::iterator Iterator;
friend class TabGroup;
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(DocGroup)
// Returns NS_ERROR_FAILURE and sets |aString| to an empty string if the TLD
// service isn't available. Returns NS_OK on success, but may still set
// |aString| may still be set to an empty string.
static MOZ_MUST_USE nsresult
GetKey(nsIPrincipal* aPrincipal, nsACString& aString);
bool MatchesKey(const nsACString& aKey)
{
return aKey == mKey;
}
PerformanceCounter* GetPerformanceCounter()
{
return mPerformanceCounter;
}
PerformanceInfo
ReportPerformanceInfo();
TabGroup* GetTabGroup()
{
return mTabGroup;
}
mozilla::dom::CustomElementReactionsStack* CustomElementReactionsStack()
{
MOZ_ASSERT(NS_IsMainThread());
if (!mReactionsStack) {
mReactionsStack = new mozilla::dom::CustomElementReactionsStack();
}
return mReactionsStack;
}
void RemoveDocument(nsIDocument* aWindow);
// Iterators for iterating over every document within the DocGroup
Iterator begin()
{
MOZ_ASSERT(NS_IsMainThread());
return mDocuments.begin();
}
Iterator end()
{
MOZ_ASSERT(NS_IsMainThread());
return mDocuments.end();
}
nsresult Dispatch(TaskCategory aCategory,
already_AddRefed<nsIRunnable>&& aRunnable);
nsISerialEventTarget* EventTargetFor(TaskCategory aCategory) const;
AbstractThread*
AbstractMainThreadFor(TaskCategory aCategory);
// Ensure that it's valid to access the DocGroup at this time.
void ValidateAccess() const
{
mTabGroup->ValidateAccess();
}
// 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);
void MoveSignalSlotListTo(nsTArray<RefPtr<HTMLSlotElement>>& aDest);
// List of DocGroups that has non-empty signal slot list.
static AutoTArray<RefPtr<DocGroup>, 2>* sPendingDocGroups;
private:
DocGroup(TabGroup* aTabGroup, const nsACString& aKey);
~DocGroup();
nsCString mKey;
RefPtr<TabGroup> mTabGroup;
nsTArray<nsIDocument*> mDocuments;
RefPtr<mozilla::dom::CustomElementReactionsStack> mReactionsStack;
nsTArray<RefPtr<HTMLSlotElement>> mSignalSlotList;
// This pointer will be null if dom.performance.enable_scheduler_timing is
// false (default value)
RefPtr<mozilla::PerformanceCounter> mPerformanceCounter;
};
} // namespace dom
} // namespace mozilla
#endif // defined(DocGroup_h)