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SHEntryChild.h
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SHEntryChild.h
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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 mozilla_dom_SHEntryChild_h
#define mozilla_dom_SHEntryChild_h
#include "mozilla/dom/PSHEntryChild.h"
#include "mozilla/dom/MaybeNewPSHEntry.h"
#include "nsContentUtils.h"
#include "nsExpirationTracker.h"
#include "nsIBFCacheEntry.h"
#include "nsISHEntry.h"
#include "nsRect.h"
#include "nsSHEntryShared.h"
#include "nsStubMutationObserver.h"
class nsDocShellEditorData;
class nsIContentViewer;
class nsILayoutHistoryState;
class nsIMutableArray;
namespace mozilla {
namespace dom {
class SHistoryChild;
/**
* Implementation of the shared state for session history entries in the child
* process.
*/
class SHEntryChildShared final : public nsIBFCacheEntry,
public nsStubMutationObserver,
public SHEntrySharedChildState {
public:
static void Init();
static SHEntryChildShared* GetOrCreate(SHistoryChild* aSHistory,
uint64_t aSharedID);
static void Remove(uint64_t aSharedID);
static uint64_t CreateSharedID() {
return nsContentUtils::GenerateProcessSpecificId(++sNextSharedID);
}
static void EvictContentViewers(
const nsTArray<uint64_t>& aToEvictSharedStateIDs);
void NotifyListenersContentViewerEvicted(uint32_t aNumEvicted = 1);
NS_DECL_ISUPPORTS
NS_DECL_NSIBFCACHEENTRY
// The nsIMutationObserver bits we actually care about.
NS_DECL_NSIMUTATIONOBSERVER_CHARACTERDATACHANGED
NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED
nsExpirationState* GetExpirationState() { return &mExpirationState; }
uint64_t GetID() { return mID; }
private:
static uint64_t sNextSharedID;
SHEntryChildShared(SHistoryChild* aSHistory, uint64_t aID);
~SHEntryChildShared();
friend class SHEntryChild;
already_AddRefed<SHEntryChildShared> Duplicate();
void RemoveFromExpirationTracker();
void SyncPresentationState();
void DropPresentationState();
nsresult SetContentViewer(nsIContentViewer* aViewer);
uint64_t mID;
RefPtr<SHistoryChild> mSHistory;
};
/**
* Session history entry actor for the child process.
*/
class SHEntryChild final : public PSHEntryChild,
public nsISHEntry,
public CrossProcessSHEntry {
friend class PSHEntryChild;
using PSHEntryChild::CrossProcessSHEntry;
public:
explicit SHEntryChild(const SHEntryChild* aClone)
: mShared(aClone->mShared.get()), mIPCActorDeleted(false) {}
SHEntryChild(SHistoryChild* aSHistory, uint64_t aSharedID)
: mShared(SHEntryChildShared::GetOrCreate(aSHistory, aSharedID)),
mIPCActorDeleted(false) {}
NS_DECL_ISUPPORTS
NS_DECL_NSISHENTRY
void EvictContentViewer();
protected:
void ActorDestroy(ActorDestroyReason aWhy) override {
mIPCActorDeleted = true;
}
private:
~SHEntryChild() = default;
RefPtr<SHEntryChildShared> mShared;
bool mIPCActorDeleted;
};
inline SHEntryChild* CrossProcessSHEntry::ToSHEntryChild() {
MOZ_ASSERT(XRE_IsContentProcess(), "Wrong side!");
return static_cast<SHEntryChild*>(this);
}
} // namespace dom
} // namespace mozilla
#endif /* mozilla_dom_SHEntryChild_h */