gecko-dev/uriloader/prefetch/nsPrefetchService.h

141 строка
4.9 KiB
C++

/* 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 nsPrefetchService_h__
#define nsPrefetchService_h__
#include "nsCPrefetchService.h"
#include "nsIObserver.h"
#include "nsIInterfaceRequestor.h"
#include "nsIChannelEventSink.h"
#include "nsIRedirectResultListener.h"
#include "nsIWebProgressListener.h"
#include "nsIStreamListener.h"
#include "nsIChannel.h"
#include "nsIURI.h"
#include "nsWeakReference.h"
#include "nsCOMPtr.h"
#include "nsAutoPtr.h"
#include "mozilla/Attributes.h"
#include <deque>
class nsPrefetchService;
class nsPrefetchNode;
//-----------------------------------------------------------------------------
// nsPrefetchService
//-----------------------------------------------------------------------------
class nsPrefetchService final : public nsIPrefetchService
, public nsIWebProgressListener
, public nsIObserver
, public nsSupportsWeakReference
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIPREFETCHSERVICE
NS_DECL_NSIWEBPROGRESSLISTENER
NS_DECL_NSIOBSERVER
nsPrefetchService();
nsresult Init();
void RemoveNodeAndMaybeStartNextPrefetchURI(nsPrefetchNode *aFinished);
void ProcessNextPrefetchURI();
void NotifyLoadRequested(nsPrefetchNode *node);
void NotifyLoadCompleted(nsPrefetchNode *node);
void DispatchEvent(nsPrefetchNode *node, bool aSuccess);
private:
~nsPrefetchService();
nsresult Prefetch(nsIURI *aURI,
nsIURI *aReferrerURI,
nsINode *aSource,
bool aExplicit);
nsresult Preload(nsIURI *aURI,
nsIURI *aReferrerURI,
nsINode *aSource,
nsContentPolicyType aPolicyType);
void AddProgressListener();
void RemoveProgressListener();
nsresult EnqueueURI(nsIURI *aURI, nsIURI *aReferrerURI,
nsINode *aSource, nsPrefetchNode **node);
void EmptyPrefetchQueue();
void StartPrefetching();
void StopPrefetching();
void StopCurrentPrefetchsPreloads(bool aPreload);
void StopAll();
nsresult CheckURIScheme(nsIURI *aURI, nsIURI *aReferrerURI);
std::deque<RefPtr<nsPrefetchNode>> mPrefetchQueue;
nsTArray<RefPtr<nsPrefetchNode>> mCurrentNodes;
int32_t mMaxParallelism;
int32_t mStopCount;
bool mHaveProcessed;
bool mPrefetchDisabled;
bool mPreloadDisabled;
// In usual case prefetch does not start until all normal loads are done.
// Aggressive mode ignores normal loads and just start prefetch ASAP.
// It's mainly for testing purpose and discoraged for normal use;
// see https://bugzilla.mozilla.org/show_bug.cgi?id=1281415 for details.
bool mAggressive;
};
//-----------------------------------------------------------------------------
// nsPreFetchingNode
//-----------------------------------------------------------------------------
class nsPrefetchNode final : public nsIStreamListener
, public nsIInterfaceRequestor
, public nsIChannelEventSink
, public nsIRedirectResultListener
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIREQUESTOBSERVER
NS_DECL_NSISTREAMLISTENER
NS_DECL_NSIINTERFACEREQUESTOR
NS_DECL_NSICHANNELEVENTSINK
NS_DECL_NSIREDIRECTRESULTLISTENER
nsPrefetchNode(nsPrefetchService *aPrefetchService,
nsIURI *aURI,
nsIURI *aReferrerURI,
nsINode *aSource,
nsContentPolicyType aPolicyType,
bool aPreload);
nsresult OpenChannel();
nsresult CancelChannel(nsresult error);
nsCOMPtr<nsIURI> mURI;
nsCOMPtr<nsIURI> mReferrerURI;
nsTArray<nsCOMPtr<nsIWeakReference>> mSources;
// The policy type to be used for fetching the resource.
nsContentPolicyType mPolicyType;
// nsPrefetchNode is used for prefetching and preloading resource.
// mPreload is true if a resource is preloaded. Preloads and
// prefetches are fetched in different phases (during load and
// after a page load), therefore we need to distinguish them.
bool mPreload;
private:
~nsPrefetchNode() {}
RefPtr<nsPrefetchService> mService;
nsCOMPtr<nsIChannel> mChannel;
nsCOMPtr<nsIChannel> mRedirectChannel;
int64_t mBytesRead;
bool mShouldFireLoadEvent;
};
#endif // !nsPrefetchService_h__