mirror of
https://github.com/mozilla/gecko-dev.git
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321 lines
8.5 KiB
C++
321 lines
8.5 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsHtml5TreeOpExecutor_h
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#define nsHtml5TreeOpExecutor_h
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#include "nsAtom.h"
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#include "nsTraceRefcnt.h"
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#include "nsHtml5TreeOperation.h"
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#include "nsHtml5SpeculativeLoad.h"
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#include "nsTArray.h"
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#include "nsContentSink.h"
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#include "nsNodeInfoManager.h"
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#include "nsHtml5DocumentMode.h"
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#include "nsIScriptElement.h"
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#include "nsIParser.h"
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#include "nsAHtml5TreeOpSink.h"
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#include "nsHtml5TreeOpStage.h"
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#include "nsIURI.h"
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#include "nsTHashSet.h"
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#include "nsHashKeys.h"
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#include "mozilla/LinkedList.h"
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#include "nsHtml5DocumentBuilder.h"
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#include "nsCharsetSource.h"
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class nsHtml5Parser;
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class nsHtml5StreamParser;
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class nsIContent;
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namespace mozilla {
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namespace dom {
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class Document;
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}
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} // namespace mozilla
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class nsHtml5TreeOpExecutor final
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: public nsHtml5DocumentBuilder,
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public nsIContentSink,
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public nsAHtml5TreeOpSink,
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public mozilla::LinkedListElement<nsHtml5TreeOpExecutor> {
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friend class nsHtml5FlushLoopGuard;
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typedef mozilla::dom::ReferrerPolicy ReferrerPolicy;
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using Encoding = mozilla::Encoding;
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template <typename T>
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using NotNull = mozilla::NotNull<T>;
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public:
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NS_DECL_ISUPPORTS_INHERITED
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private:
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#ifdef DEBUG_NS_HTML5_TREE_OP_EXECUTOR_FLUSH
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static uint32_t sAppendBatchMaxSize;
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static uint32_t sAppendBatchSlotsExamined;
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static uint32_t sAppendBatchExaminations;
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static uint32_t sLongestTimeOffTheEventLoop;
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static uint32_t sTimesFlushLoopInterrupted;
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#endif
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/**
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* Whether EOF needs to be suppressed
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*/
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bool mSuppressEOF;
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bool mReadingFromStage;
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nsTArray<nsHtml5TreeOperation> mOpQueue;
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nsHtml5StreamParser* mStreamParser;
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/**
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* URLs already preloaded/preloading.
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*/
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nsTHashSet<nsCString> mPreloadedURLs;
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nsCOMPtr<nsIURI> mSpeculationBaseURI;
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nsCOMPtr<nsIURI> mViewSourceBaseURI;
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/**
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* Whether the parser has started
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*/
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bool mStarted;
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nsHtml5TreeOpStage mStage;
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bool mRunFlushLoopOnStack;
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bool mCallContinueInterruptedParsingIfEnabled;
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/**
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* Whether this executor has already complained about matters related
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* to character encoding declarations.
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*/
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bool mAlreadyComplainedAboutCharset;
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/**
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* Whether this executor has already complained about the tree being too
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* deep.
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*/
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bool mAlreadyComplainedAboutDeepTree;
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public:
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nsHtml5TreeOpExecutor();
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protected:
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virtual ~nsHtml5TreeOpExecutor();
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public:
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// nsIContentSink
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/**
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* Unimplemented. For interface compat only.
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*/
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NS_IMETHOD WillParse() override;
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NS_IMETHOD WillBuildModel(nsDTDMode /* unused */) override {
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return WillBuildModel();
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}
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nsresult WillBuildModel();
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/**
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* Emits EOF.
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*/
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NS_IMETHOD DidBuildModel(bool aTerminated) override;
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/**
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* Forwards to nsContentSink
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*/
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NS_IMETHOD WillInterrupt() override;
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/**
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* Unimplemented. For interface compat only.
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*/
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void WillResume() override;
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virtual nsIContentSink* AsExecutor() override { return this; }
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virtual void InitialTranslationCompleted() override;
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/**
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* Sets the parser.
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*/
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NS_IMETHOD SetParser(nsParserBase* aParser) override;
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/**
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* No-op for backwards compat.
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*/
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virtual void FlushPendingNotifications(mozilla::FlushType aType) override;
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/**
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* Don't call. For interface compat only.
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*/
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virtual void SetDocumentCharset(NotNull<const Encoding*> aEncoding) override {
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MOZ_ASSERT_UNREACHABLE("No one should call this.");
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}
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/**
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* Returns the document.
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*/
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virtual nsISupports* GetTarget() override;
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virtual void ContinueInterruptedParsingAsync() override;
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bool IsScriptExecuting() override { return IsScriptExecutingImpl(); }
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// Not from interface
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void SetStreamParser(nsHtml5StreamParser* aStreamParser) {
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mStreamParser = aStreamParser;
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}
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void InitializeDocWriteParserState(nsAHtml5TreeBuilderState* aState,
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int32_t aLine);
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bool IsScriptEnabled();
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virtual nsresult MarkAsBroken(nsresult aReason) override;
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void StartLayout(bool* aInterrupted);
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void PauseDocUpdate(bool* aInterrupted);
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void FlushSpeculativeLoads();
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void RunFlushLoop();
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nsresult FlushDocumentWrite();
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void CommitToInternalEncoding();
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[[nodiscard]] bool TakeOpsFromStage();
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void MaybeSuspend();
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void Start();
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void SetDocumentCharsetAndSource(NotNull<const Encoding*> aEncoding,
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nsCharsetSource aCharsetSource);
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void UpdateCharsetSource(nsCharsetSource aCharsetSource);
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void NeedsCharsetSwitchTo(NotNull<const Encoding*> aEncoding, int32_t aSource,
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uint32_t aLineNumber);
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void MaybeComplainAboutCharset(const char* aMsgId, bool aError,
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uint32_t aLineNumber);
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void ComplainAboutBogusProtocolCharset(mozilla::dom::Document* aDoc,
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bool aUnrecognized);
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void MaybeComplainAboutDeepTree(uint32_t aLineNumber);
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bool HasStarted() { return mStarted; }
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bool IsFlushing() { return mFlushState >= eInFlush; }
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#ifdef DEBUG
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bool IsInFlushLoop() { return mRunFlushLoopOnStack; }
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#endif
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void RunScript(nsIContent* aScriptElement);
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/**
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* Flush the operations from the tree operations from the argument
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* queue unconditionally. (This is for the main thread case.)
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*/
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[[nodiscard]] virtual bool MoveOpsFrom(
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nsTArray<nsHtml5TreeOperation>& aOpQueue) override;
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void ClearOpQueue();
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void RemoveFromStartOfOpQueue(size_t aNumberOfOpsToRemove);
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inline size_t OpQueueLength() { return mOpQueue.Length(); }
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nsHtml5TreeOpStage* GetStage() { return &mStage; }
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void StartReadingFromStage() { mReadingFromStage = true; }
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void StreamEnded();
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#ifdef DEBUG
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void AssertStageEmpty() { mStage.AssertEmpty(); }
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#endif
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nsIURI* GetViewSourceBaseURI();
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void PreloadScript(const nsAString& aURL, const nsAString& aCharset,
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const nsAString& aType, const nsAString& aCrossOrigin,
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const nsAString& aMedia, const nsAString& aIntegrity,
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ReferrerPolicy aReferrerPolicy, bool aScriptFromHead,
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bool aAsync, bool aDefer, bool aNoModule,
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bool aLinkPreload);
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void PreloadStyle(const nsAString& aURL, const nsAString& aCharset,
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const nsAString& aCrossOrigin, const nsAString& aMedia,
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const nsAString& aReferrerPolicy,
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const nsAString& aIntegrity, bool aLinkPreload);
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void PreloadImage(const nsAString& aURL, const nsAString& aCrossOrigin,
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const nsAString& aMedia, const nsAString& aSrcset,
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const nsAString& aSizes,
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const nsAString& aImageReferrerPolicy, bool aLinkPreload,
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const mozilla::TimeStamp& aInitTimestamp);
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void PreloadOpenPicture();
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void PreloadEndPicture();
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void PreloadPictureSource(const nsAString& aSrcset, const nsAString& aSizes,
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const nsAString& aType, const nsAString& aMedia);
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void PreloadFont(const nsAString& aURL, const nsAString& aCrossOrigin,
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const nsAString& aMedia, const nsAString& aReferrerPolicy);
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void PreloadFetch(const nsAString& aURL, const nsAString& aCrossOrigin,
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const nsAString& aMedia, const nsAString& aReferrerPolicy);
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void SetSpeculationBase(const nsAString& aURL);
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void UpdateReferrerInfoFromMeta(const nsAString& aMetaReferrer);
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void AddSpeculationCSP(const nsAString& aCSP);
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void AddBase(const nsAString& aURL);
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private:
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nsHtml5Parser* GetParser();
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bool IsExternalViewSource();
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/**
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* Get a nsIURI for an nsString if the URL hasn't been preloaded yet.
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*/
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already_AddRefed<nsIURI> ConvertIfNotPreloadedYet(const nsAString& aURL);
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/**
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* The above, plus also checks that the media attribute applies.
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*/
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already_AddRefed<nsIURI> ConvertIfNotPreloadedYetAndMediaApplies(
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const nsAString& aURL, const nsAString& aMedia);
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/** Returns whether the given media attribute applies to mDocument */
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bool MediaApplies(const nsAString& aMedia);
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/**
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* The base URI we would use for current preload operations
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*/
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nsIURI* BaseURIForPreload();
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/**
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* Returns true if we haven't preloaded this URI yet, and adds it to the
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* list of preloaded URIs
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*/
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bool ShouldPreloadURI(nsIURI* aURI);
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ReferrerPolicy GetPreloadReferrerPolicy(const nsAString& aReferrerPolicy);
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ReferrerPolicy GetPreloadReferrerPolicy(ReferrerPolicy aReferrerPolicy);
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};
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#endif // nsHtml5TreeOpExecutor_h
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