diff options
Diffstat (limited to '')
-rw-r--r-- | docshell/shistory/nsSHEntryShared.h | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/docshell/shistory/nsSHEntryShared.h b/docshell/shistory/nsSHEntryShared.h new file mode 100644 index 0000000000..5ff855ead4 --- /dev/null +++ b/docshell/shistory/nsSHEntryShared.h @@ -0,0 +1,219 @@ +/* -*- 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 nsSHEntryShared_h__ +#define nsSHEntryShared_h__ + +#include "nsCOMArray.h" +#include "nsCOMPtr.h" +#include "nsExpirationTracker.h" +#include "nsIBFCacheEntry.h" +#include "nsIWeakReferenceUtils.h" +#include "nsRect.h" +#include "nsString.h" +#include "nsStubMutationObserver.h" + +#include "mozilla/Attributes.h" +#include "mozilla/UniquePtr.h" + +class nsSHEntry; +class nsISHEntry; +class nsISHistory; +class nsIContentSecurityPolicy; +class nsIDocShellTreeItem; +class nsIDocumentViewer; +class nsILayoutHistoryState; +class nsIPrincipal; +class nsDocShellEditorData; +class nsFrameLoader; +class nsIMutableArray; +class nsSHistory; + +// A document may have multiple SHEntries, either due to hash navigations or +// calls to history.pushState. SHEntries corresponding to the same document +// share many members; in particular, they share state related to the +// back/forward cache. +// +// The classes defined here are the vehicle for this sharing. +// +// Some of the state can only be stored in the process where we did the actual +// load, because that's where the objects live (eg. the content viewer). + +namespace mozilla { +namespace dom { +class Document; + +/** + * SHEntrySharedState holds shared state both in the child process and in the + * parent process. + */ +struct SHEntrySharedState { + SHEntrySharedState() : mId(GenerateId()) {} + SHEntrySharedState(const SHEntrySharedState& aState) = default; + SHEntrySharedState(nsIPrincipal* aTriggeringPrincipal, + nsIPrincipal* aPrincipalToInherit, + nsIPrincipal* aPartitionedPrincipalToInherit, + nsIContentSecurityPolicy* aCsp, + const nsACString& aContentType) + : mId(GenerateId()), + mTriggeringPrincipal(aTriggeringPrincipal), + mPrincipalToInherit(aPrincipalToInherit), + mPartitionedPrincipalToInherit(aPartitionedPrincipalToInherit), + mCsp(aCsp), + mContentType(aContentType) {} + + // These members aren't copied by SHEntrySharedParentState::CopyFrom() because + // they're specific to a particular content viewer. + uint64_t mId = 0; + + // These members are copied by SHEntrySharedParentState::CopyFrom(). If you + // add a member here, be sure to update the CopyFrom() implementation. + nsCOMPtr<nsIPrincipal> mTriggeringPrincipal; + nsCOMPtr<nsIPrincipal> mPrincipalToInherit; + nsCOMPtr<nsIPrincipal> mPartitionedPrincipalToInherit; + nsCOMPtr<nsIContentSecurityPolicy> mCsp; + nsCString mContentType; + // Child side updates layout history state when page is being unloaded or + // moved to bfcache. + nsCOMPtr<nsILayoutHistoryState> mLayoutHistoryState; + uint32_t mCacheKey = 0; + bool mIsFrameNavigation = false; + bool mSaveLayoutState = true; + + protected: + static uint64_t GenerateId(); +}; + +/** + * SHEntrySharedParentState holds the shared state that can live in the parent + * process. + */ +class SHEntrySharedParentState : public SHEntrySharedState { + public: + friend class SessionHistoryInfo; + + uint64_t GetId() const { return mId; } + void ChangeId(uint64_t aId); + + void SetFrameLoader(nsFrameLoader* aFrameLoader); + + nsFrameLoader* GetFrameLoader(); + + void NotifyListenersDocumentViewerEvicted(); + + nsExpirationState* GetExpirationState() { return &mExpirationState; } + + SHEntrySharedParentState(); + SHEntrySharedParentState(nsIPrincipal* aTriggeringPrincipal, + nsIPrincipal* aPrincipalToInherit, + nsIPrincipal* aPartitionedPrincipalToInherit, + nsIContentSecurityPolicy* aCsp, + const nsACString& aContentType); + + // This returns the existing SHEntrySharedParentState that was registered for + // aId, if one exists. + static SHEntrySharedParentState* Lookup(uint64_t aId); + + protected: + virtual ~SHEntrySharedParentState(); + NS_INLINE_DECL_VIRTUAL_REFCOUNTING_WITH_DESTROY(SHEntrySharedParentState, + Destroy()) + + virtual void Destroy() { delete this; } + + void CopyFrom(SHEntrySharedParentState* aSource); + + // These members are copied by SHEntrySharedParentState::CopyFrom(). If you + // add a member here, be sure to update the CopyFrom() implementation. + nsID mDocShellID{}; + + nsIntRect mViewerBounds{0, 0, 0, 0}; + + uint32_t mLastTouched = 0; + + // These members aren't copied by SHEntrySharedParentState::CopyFrom() because + // they're specific to a particular content viewer. + nsWeakPtr mSHistory; + + RefPtr<nsFrameLoader> mFrameLoader; + + nsExpirationState mExpirationState; + + bool mSticky = true; + bool mDynamicallyCreated = false; + + // This flag is about necko cache, not bfcache. + bool mExpired = false; +}; + +/** + * SHEntrySharedChildState holds the shared state that needs to live in the + * process where the document was loaded. + */ +class SHEntrySharedChildState { + protected: + void CopyFrom(SHEntrySharedChildState* aSource); + + public: + // These members are copied by SHEntrySharedChildState::CopyFrom(). If you + // add a member here, be sure to update the CopyFrom() implementation. + nsCOMArray<nsIDocShellTreeItem> mChildShells; + + // These members aren't copied by SHEntrySharedChildState::CopyFrom() because + // they're specific to a particular content viewer. + nsCOMPtr<nsIDocumentViewer> mDocumentViewer; + RefPtr<mozilla::dom::Document> mDocument; + nsCOMPtr<nsISupports> mWindowState; + // FIXME Move to parent? + nsCOMPtr<nsIMutableArray> mRefreshURIList; + UniquePtr<nsDocShellEditorData> mEditorData; +}; + +} // namespace dom +} // namespace mozilla + +/** + * nsSHEntryShared holds the shared state if the session history is not stored + * in the parent process, or if the load itself happens in the parent process. + * Note, since nsSHEntryShared inherits both SHEntrySharedParentState and + * SHEntrySharedChildState and those have some same member variables, + * the ones from SHEntrySharedParentState should be used. + */ +class nsSHEntryShared final : public nsIBFCacheEntry, + public nsStubMutationObserver, + public mozilla::dom::SHEntrySharedParentState, + public mozilla::dom::SHEntrySharedChildState { + public: + static void EnsureHistoryTracker(); + static void Shutdown(); + + using SHEntrySharedParentState::SHEntrySharedParentState; + + already_AddRefed<nsSHEntryShared> Duplicate(); + + NS_DECL_ISUPPORTS_INHERITED + 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 + + private: + ~nsSHEntryShared(); + + friend class nsSHEntry; + + void RemoveFromExpirationTracker(); + void SyncPresentationState(); + void DropPresentationState(); + + nsresult SetDocumentViewer(nsIDocumentViewer* aViewer); +}; + +#endif |