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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /parser/htmlparser/nsParser.h | |
parent | Initial commit. (diff) | |
download | firefox-esr-upstream.tar.xz firefox-esr-upstream.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'parser/htmlparser/nsParser.h')
-rw-r--r-- | parser/htmlparser/nsParser.h | 312 |
1 files changed, 312 insertions, 0 deletions
diff --git a/parser/htmlparser/nsParser.h b/parser/htmlparser/nsParser.h new file mode 100644 index 0000000000..95782e954b --- /dev/null +++ b/parser/htmlparser/nsParser.h @@ -0,0 +1,312 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* 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/. */ + +/** + * MODULE NOTES: + * + * This class does two primary jobs: + * 1) It iterates the tokens provided during the + * tokenization process, identifing where elements + * begin and end (doing validation and normalization). + * 2) It controls and coordinates with an instance of + * the IContentSink interface, to coordinate the + * the production of the content model. + * + * The basic operation of this class assumes that an HTML + * document is non-normalized. Therefore, we don't process + * the document in a normalized way. Don't bother to look + * for methods like: doHead() or doBody(). + * + * Instead, in order to be backward compatible, we must + * scan the set of tokens and perform this basic set of + * operations: + * 1) Determine the token type (easy, since the tokens know) + * 2) Determine the appropriate section of the HTML document + * each token belongs in (HTML,HEAD,BODY,FRAMESET). + * 3) Insert content into our document (via the sink) into + * the correct section. + * 4) In the case of tags that belong in the BODY, we must + * ensure that our underlying document state reflects + * the appropriate context for our tag. + * + * For example,if we see a <TR>, we must ensure our + * document contains a table into which the row can + * be placed. This may result in "implicit containers" + * created to ensure a well-formed document. + * + */ + +#ifndef NS_PARSER__ +#define NS_PARSER__ + +#include "nsIParser.h" +#include "nsDeque.h" +#include "CParserContext.h" +#include "nsHTMLTags.h" +#include "nsIContentSink.h" +#include "nsCOMArray.h" +#include "nsCycleCollectionParticipant.h" +#include "nsWeakReference.h" +#include "mozilla/Maybe.h" +#include "mozilla/UniquePtr.h" + +class nsIDTD; +class nsIRunnable; + +#ifdef _MSC_VER +# pragma warning(disable : 4275) +#endif + +class nsParser final : public nsIParser, + public nsIStreamListener, + public nsSupportsWeakReference { + /** + * Destructor + * @update gess5/11/98 + */ + virtual ~nsParser(); + + public: + /** + * Called on module init + */ + static nsresult Init(); + + /** + * Called on module shutdown + */ + static void Shutdown(); + + NS_DECL_CYCLE_COLLECTING_ISUPPORTS + NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(nsParser, nsIParser) + + /** + * default constructor + * @update gess5/11/98 + */ + nsParser(); + + /** + * Select given content sink into parser for parser output + * @update gess5/11/98 + * @param aSink is the new sink to be used by parser + * @return old sink, or nullptr + */ + NS_IMETHOD_(void) SetContentSink(nsIContentSink* aSink) override; + + /** + * retrive the sink set into the parser + * @update gess5/11/98 + * @param aSink is the new sink to be used by parser + * @return old sink, or nullptr + */ + NS_IMETHOD_(nsIContentSink*) GetContentSink(void) override; + + /** + * Call this method once you've created a parser, and want to instruct it + * about the command which caused the parser to be constructed. For example, + * this allows us to select a DTD which can do, say, view-source. + * + * @update gess 3/25/98 + * @param aCommand -- ptrs to string that contains command + * @return nada + */ + NS_IMETHOD_(void) GetCommand(nsCString& aCommand) override; + NS_IMETHOD_(void) SetCommand(const char* aCommand) override; + NS_IMETHOD_(void) SetCommand(eParserCommands aParserCommand) override; + + /** + * Call this method once you've created a parser, and want to instruct it + * about what charset to load + * + * @update ftang 4/23/99 + * @param aCharset- the charset of a document + * @param aCharsetSource- the source of the charset + * @param aChannelHadCharset- ignored + * @return nada + */ + virtual void SetDocumentCharset(NotNull<const Encoding*> aCharset, + int32_t aSource, + bool aForceAutoDetection) override; + + NotNull<const Encoding*> GetDocumentCharset(int32_t& aSource) { + aSource = mCharsetSource; + return mCharset; + } + + /** + * Cause parser to parse input from given URL + */ + NS_IMETHOD Parse(nsIURI* aURL) override; + + /** + * This method gets called when you want to parse a fragment of XML surrounded + * by the context |aTagStack|. It requires that the parser have been given a + * fragment content sink. + * + * @param aSourceBuffer The XML that hasn't been parsed yet. + * @param aTagStack The context of the source buffer. + */ + nsresult ParseFragment(const nsAString& aSourceBuffer, + nsTArray<nsString>& aTagStack); + + NS_IMETHOD ContinueInterruptedParsing() override; + NS_IMETHOD_(void) BlockParser() override; + NS_IMETHOD_(void) UnblockParser() override; + NS_IMETHOD_(void) ContinueInterruptedParsingAsync() override; + NS_IMETHOD Terminate(void) override; + + /** + * Call this to query whether the parser is enabled or not. + * + * @update vidur 4/12/99 + * @return current state + */ + NS_IMETHOD_(bool) IsParserEnabled() override; + + /** + * Call this to query whether the parser thinks it's done with parsing. + * + * @update rickg 5/12/01 + * @return complete state + */ + NS_IMETHOD_(bool) IsComplete() override; + + /** + * This method gets called (automatically) during incremental parsing + * @update gess5/11/98 + * @return TRUE if all went well, otherwise FALSE + */ + virtual nsresult ResumeParse(bool allowIteration = true, + bool aIsFinalChunk = false, + bool aCanInterrupt = true); + + //********************************************* + // These methods are callback methods used by + // net lib to let us know about our inputstream. + //********************************************* + // nsIRequestObserver methods: + NS_DECL_NSIREQUESTOBSERVER + + // nsIStreamListener methods: + NS_DECL_NSISTREAMLISTENER + + /** + * Get the nsIStreamListener for this parser + */ + virtual nsIStreamListener* GetStreamListener() override; + + void SetSinkCharset(NotNull<const Encoding*> aCharset); + + /** + * Return true. + */ + virtual bool IsInsertionPointDefined() override; + + /** + * No-op. + */ + void IncrementScriptNestingLevel() final; + + /** + * No-op. + */ + void DecrementScriptNestingLevel() final; + + bool HasNonzeroScriptNestingLevel() const final; + + /** + * Always false. + */ + virtual bool IsScriptCreated() override; + + /** + * This is called when the final chunk has been + * passed to the parser and the content sink has + * interrupted token processing. It schedules + * a ParserContinue PL_Event which will ask the parser + * to HandleParserContinueEvent when it is handled. + * @update kmcclusk6/1/2001 + */ + nsresult PostContinueEvent(); + + /** + * Fired when the continue parse event is triggered. + * @update kmcclusk 5/18/98 + */ + void HandleParserContinueEvent(class nsParserContinueEvent*); + + void Reset() { + Cleanup(); + mUnusedInput.Truncate(); + Initialize(); + } + + bool IsScriptExecuting() { return mSink && mSink->IsScriptExecuting(); } + + bool IsOkToProcessNetworkData() { + return !IsScriptExecuting() && !mProcessingNetworkData; + } + + // Returns Nothing() if we haven't determined yet what the parser is being + // used for. Else returns whether this parser is used for parsing XML. + mozilla::Maybe<bool> IsForParsingXML() { + if (!mParserContext || mParserContext->mDTDMode == eDTDMode_autodetect) { + return mozilla::Nothing(); + } + + return mozilla::Some(mParserContext->mDocType == eXML); + } + + protected: + void Initialize(); + void Cleanup(); + + /** + * + * @update gess5/18/98 + * @param + * @return + */ + nsresult WillBuildModel(); + + /** + * Called when parsing is done. + */ + void DidBuildModel(); + + private: + /** + * Pushes XML fragment parsing data to expat without an input stream. + */ + nsresult Parse(const nsAString& aSourceBuffer, bool aLastCall); + + protected: + //********************************************* + // And now, some data members... + //********************************************* + + mozilla::UniquePtr<CParserContext> mParserContext; + nsCOMPtr<nsIDTD> mDTD; + nsCOMPtr<nsIContentSink> mSink; + nsIRunnable* mContinueEvent; // weak ref + + eParserCommands mCommand; + nsresult mInternalState; + nsresult mStreamStatus; + int32_t mCharsetSource; + + uint16_t mFlags; + uint32_t mBlocked; + + nsString mUnusedInput; + NotNull<const Encoding*> mCharset; + nsCString mCommandStr; + + bool mProcessingNetworkData; + bool mIsAboutBlank; +}; + +#endif |