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Diffstat (limited to 'parser/html/nsHtml5TreeOpExecutor.h')
| -rw-r--r-- | parser/html/nsHtml5TreeOpExecutor.h | 306 |
1 files changed, 306 insertions, 0 deletions
diff --git a/parser/html/nsHtml5TreeOpExecutor.h b/parser/html/nsHtml5TreeOpExecutor.h new file mode 100644 index 0000000000..c4b6a45943 --- /dev/null +++ b/parser/html/nsHtml5TreeOpExecutor.h @@ -0,0 +1,306 @@ +/* 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 nsHtml5TreeOpExecutor_h +#define nsHtml5TreeOpExecutor_h + +#include "nsIAtom.h" +#include "nsTraceRefcnt.h" +#include "nsHtml5TreeOperation.h" +#include "nsHtml5SpeculativeLoad.h" +#include "nsTArray.h" +#include "nsContentSink.h" +#include "nsNodeInfoManager.h" +#include "nsHtml5DocumentMode.h" +#include "nsIScriptElement.h" +#include "nsIParser.h" +#include "nsAHtml5TreeOpSink.h" +#include "nsHtml5TreeOpStage.h" +#include "nsIURI.h" +#include "nsTHashtable.h" +#include "nsHashKeys.h" +#include "mozilla/LinkedList.h" +#include "nsHtml5DocumentBuilder.h" +#include "mozilla/net/ReferrerPolicy.h" + +class nsHtml5Parser; +class nsHtml5StreamParser; +class nsIContent; +class nsIDocument; + +class nsHtml5TreeOpExecutor final : public nsHtml5DocumentBuilder, + public nsIContentSink, + public nsAHtml5TreeOpSink, + public mozilla::LinkedListElement<nsHtml5TreeOpExecutor> +{ + friend class nsHtml5FlushLoopGuard; + typedef mozilla::net::ReferrerPolicy ReferrerPolicy; + + public: + NS_DECL_AND_IMPL_ZEROING_OPERATOR_NEW + NS_DECL_ISUPPORTS_INHERITED + + private: + static bool sExternalViewSource; +#ifdef DEBUG_NS_HTML5_TREE_OP_EXECUTOR_FLUSH + static uint32_t sAppendBatchMaxSize; + static uint32_t sAppendBatchSlotsExamined; + static uint32_t sAppendBatchExaminations; + static uint32_t sLongestTimeOffTheEventLoop; + static uint32_t sTimesFlushLoopInterrupted; +#endif + + /** + * Whether EOF needs to be suppressed + */ + bool mSuppressEOF; + + bool mReadingFromStage; + nsTArray<nsHtml5TreeOperation> mOpQueue; + nsHtml5StreamParser* mStreamParser; + + /** + * URLs already preloaded/preloading. + */ + nsTHashtable<nsCStringHashKey> mPreloadedURLs; + + nsCOMPtr<nsIURI> mSpeculationBaseURI; + + /** + * Speculative referrer policy + */ + ReferrerPolicy mSpeculationReferrerPolicy; + + nsCOMPtr<nsIURI> mViewSourceBaseURI; + + /** + * Whether the parser has started + */ + bool mStarted; + + nsHtml5TreeOpStage mStage; + + bool mRunFlushLoopOnStack; + + bool mCallContinueInterruptedParsingIfEnabled; + + /** + * Whether this executor has already complained about matters related + * to character encoding declarations. + */ + bool mAlreadyComplainedAboutCharset; + + public: + + nsHtml5TreeOpExecutor(); + + protected: + + virtual ~nsHtml5TreeOpExecutor(); + + public: + + // nsIContentSink + + /** + * Unimplemented. For interface compat only. + */ + NS_IMETHOD WillParse() override; + + /** + * + */ + NS_IMETHOD WillBuildModel(nsDTDMode aDTDMode) override; + + /** + * Emits EOF. + */ + NS_IMETHOD DidBuildModel(bool aTerminated) override; + + /** + * Forwards to nsContentSink + */ + NS_IMETHOD WillInterrupt() override; + + /** + * Unimplemented. For interface compat only. + */ + NS_IMETHOD WillResume() override; + + /** + * Sets the parser. + */ + NS_IMETHOD SetParser(nsParserBase* aParser) override; + + /** + * No-op for backwards compat. + */ + virtual void FlushPendingNotifications(mozFlushType aType) override; + + /** + * Don't call. For interface compat only. + */ + NS_IMETHOD SetDocumentCharset(nsACString& aCharset) override { + NS_NOTREACHED("No one should call this."); + return NS_ERROR_NOT_IMPLEMENTED; + } + + /** + * Returns the document. + */ + virtual nsISupports *GetTarget() override; + + virtual void ContinueInterruptedParsingAsync() override; + + bool IsScriptExecuting() override + { + return IsScriptExecutingImpl(); + } + + // Not from interface + + void SetStreamParser(nsHtml5StreamParser* aStreamParser) + { + mStreamParser = aStreamParser; + } + + void InitializeDocWriteParserState(nsAHtml5TreeBuilderState* aState, int32_t aLine); + + bool IsScriptEnabled(); + + virtual nsresult MarkAsBroken(nsresult aReason) override; + + void StartLayout(); + + void FlushSpeculativeLoads(); + + void RunFlushLoop(); + + nsresult FlushDocumentWrite(); + + void MaybeSuspend(); + + void Start(); + + void NeedsCharsetSwitchTo(const char* aEncoding, + int32_t aSource, + uint32_t aLineNumber); + + void MaybeComplainAboutCharset(const char* aMsgId, + bool aError, + uint32_t aLineNumber); + + void ComplainAboutBogusProtocolCharset(nsIDocument* aDoc); + + bool IsComplete() + { + return !mParser; + } + + bool HasStarted() + { + return mStarted; + } + + bool IsFlushing() + { + return mFlushState >= eInFlush; + } + +#ifdef DEBUG + bool IsInFlushLoop() + { + return mRunFlushLoopOnStack; + } +#endif + + void RunScript(nsIContent* aScriptElement); + + /** + * Flush the operations from the tree operations from the argument + * queue unconditionally. (This is for the main thread case.) + */ + virtual void MoveOpsFrom(nsTArray<nsHtml5TreeOperation>& aOpQueue) override; + + nsHtml5TreeOpStage* GetStage() + { + return &mStage; + } + + void StartReadingFromStage() + { + mReadingFromStage = true; + } + + void StreamEnded(); + +#ifdef DEBUG + void AssertStageEmpty() + { + mStage.AssertEmpty(); + } +#endif + + nsIURI* GetViewSourceBaseURI(); + + void PreloadScript(const nsAString& aURL, + const nsAString& aCharset, + const nsAString& aType, + const nsAString& aCrossOrigin, + const nsAString& aIntegrity, + bool aScriptFromHead); + + void PreloadStyle(const nsAString& aURL, const nsAString& aCharset, + const nsAString& aCrossOrigin, + const nsAString& aIntegrity); + + void PreloadImage(const nsAString& aURL, + const nsAString& aCrossOrigin, + const nsAString& aSrcset, + const nsAString& aSizes, + const nsAString& aImageReferrerPolicy); + + void PreloadOpenPicture(); + + void PreloadEndPicture(); + + void PreloadPictureSource(const nsAString& aSrcset, + const nsAString& aSizes, + const nsAString& aType, + const nsAString& aMedia); + + void SetSpeculationBase(const nsAString& aURL); + + void SetSpeculationReferrerPolicy(ReferrerPolicy aReferrerPolicy); + void SetSpeculationReferrerPolicy(const nsAString& aReferrerPolicy); + + void AddSpeculationCSP(const nsAString& aCSP); + + void AddBase(const nsAString& aURL); + + static void InitializeStatics(); + + private: + nsHtml5Parser* GetParser(); + + bool IsExternalViewSource(); + + /** + * Get a nsIURI for an nsString if the URL hasn't been preloaded yet. + */ + already_AddRefed<nsIURI> ConvertIfNotPreloadedYet(const nsAString& aURL); + + /** + * The base URI we would use for current preload operations + */ + nsIURI* BaseURIForPreload(); + + /** + * Returns true if we haven't preloaded this URI yet, and adds it to the + * list of preloaded URIs + */ + bool ShouldPreloadURI(nsIURI *aURI); +}; + +#endif // nsHtml5TreeOpExecutor_h |