mirror of
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249 lines
8.2 KiB
C++
249 lines
8.2 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 sw=2 et tw=78: */
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/* 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 NS_IPARSER___
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#define NS_IPARSER___
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/**
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* This GECKO-INTERNAL interface is on track to being REMOVED (or refactored
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* to the point of being near-unrecognizable).
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*
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* Please DO NOT #include this file in comm-central code, in your XULRunner
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* app or binary extensions.
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*
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* Please DO NOT #include this into new files even inside Gecko. It is more
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* likely than not that #including this header is the wrong thing to do.
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*/
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#include "nsISupports.h"
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#include "nsIStreamListener.h"
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#include "nsIDTD.h"
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#include "nsString.h"
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#include "nsTArray.h"
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#include "nsAtom.h"
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#include "nsParserBase.h"
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#include "mozilla/NotNull.h"
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#define NS_IPARSER_IID \
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{ \
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0x2c4ad90a, 0x740e, 0x4212, { \
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0xba, 0x3f, 0xfe, 0xac, 0xda, 0x4b, 0x92, 0x9e \
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} \
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}
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class nsIContentSink;
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class nsIRequestObserver;
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class nsIURI;
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class nsIChannel;
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namespace mozilla {
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class Encoding;
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}
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enum eParserCommands { eViewNormal, eViewSource, eViewFragment, eViewErrors };
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enum eParserDocType { ePlainText = 0, eXML, eHTML_Quirks, eHTML_Strict };
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enum eStreamState { eNone, eOnStart, eOnDataAvail, eOnStop };
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/**
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* This GECKO-INTERNAL interface is on track to being REMOVED (or refactored
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* to the point of being near-unrecognizable).
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*
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* Please DO NOT #include this file in comm-central code, in your XULRunner
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* app or binary extensions.
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*
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* Please DO NOT #include this into new files even inside Gecko. It is more
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* likely than not that #including this header is the wrong thing to do.
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*/
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class nsIParser : public nsParserBase {
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protected:
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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_DECLARE_STATIC_IID_ACCESSOR(NS_IPARSER_IID)
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/**
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* Select given content sink into parser for parser output
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* @update gess5/11/98
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* @param aSink is the new sink to be used by parser
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* @return
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*/
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NS_IMETHOD_(void) SetContentSink(nsIContentSink* aSink) = 0;
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/**
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* retrieve the sink set into the parser
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* @update gess5/11/98
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* @return current sink
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*/
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NS_IMETHOD_(nsIContentSink*) GetContentSink(void) = 0;
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/**
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* Call this method once you've created a parser, and want to instruct it
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* about the command which caused the parser to be constructed. For example,
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* this allows us to select a DTD which can do, say, view-source.
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*
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* @update gess 3/25/98
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* @param aCommand -- ptrs to string that contains command
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* @return nada
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*/
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NS_IMETHOD_(void) GetCommand(nsCString& aCommand) = 0;
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NS_IMETHOD_(void) SetCommand(const char* aCommand) = 0;
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NS_IMETHOD_(void) SetCommand(eParserCommands aParserCommand) = 0;
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/**
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* Call this method once you've created a parser, and want to instruct it
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* about what charset to load
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*
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* @update ftang 4/23/99
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* @param aCharset- the charest of a document
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* @param aCharsetSource- the soure of the chares
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* @param aChannelHadCharset- whether the channel had charset
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* @return nada
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*/
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virtual void SetDocumentCharset(NotNull<const Encoding*> aCharset,
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int32_t aSource,
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bool aChannelHadCharset = false) = 0;
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/**
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* Get the channel associated with this parser
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* @update harishd,gagan 07/17/01
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* @param aChannel out param that will contain the result
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* @return NS_OK if successful
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*/
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NS_IMETHOD GetChannel(nsIChannel** aChannel) override = 0;
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/**
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* Get the DTD associated with this parser
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* @update vidur 9/29/99
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* @param aDTD out param that will contain the result
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* @return NS_OK if successful, NS_ERROR_FAILURE for runtime error
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*/
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NS_IMETHOD GetDTD(nsIDTD** aDTD) = 0;
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/**
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* Get the nsIStreamListener for this parser
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*/
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virtual nsIStreamListener* GetStreamListener() = 0;
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/**************************************************************************
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* Parse methods always begin with an input source, and perform
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* conversions until you wind up being emitted to the given contentsink
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* (which may or may not be a proxy for the NGLayout content model).
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************************************************************************/
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// Call this method to resume the parser from an unblocked state.
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// This can happen, for example, if parsing was interrupted and then the
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// consumer needed to restart the parser without waiting for more data.
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// This also happens after loading scripts, which unblock the parser in
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// order to process the output of document.write() and then need to
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// continue on with the page load on an enabled parser.
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NS_IMETHOD ContinueInterruptedParsing() = 0;
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// Stops parsing temporarily.
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NS_IMETHOD_(void) BlockParser() = 0;
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// Open up the parser for tokenization, building up content
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// model..etc. However, this method does not resume parsing
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// automatically. It's the callers' responsibility to restart
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// the parsing engine.
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NS_IMETHOD_(void) UnblockParser() = 0;
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/**
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* Asynchronously continues parsing.
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*/
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NS_IMETHOD_(void) ContinueInterruptedParsingAsync() = 0;
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NS_IMETHOD_(bool) IsParserEnabled() override = 0;
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NS_IMETHOD_(bool) IsComplete() = 0;
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NS_IMETHOD Parse(nsIURI* aURL, nsIRequestObserver* aListener = nullptr,
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void* aKey = 0, nsDTDMode aMode = eDTDMode_autodetect) = 0;
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NS_IMETHOD Terminate(void) = 0;
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/**
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* This method gets called when you want to parse a fragment of HTML or XML
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* surrounded by the context |aTagStack|. It requires that the parser have
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* been given a fragment content sink.
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*
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* @param aSourceBuffer The XML or HTML that hasn't been parsed yet.
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* @param aTagStack The context of the source buffer.
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* @return Success or failure.
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*/
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NS_IMETHOD ParseFragment(const nsAString& aSourceBuffer,
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nsTArray<nsString>& aTagStack) = 0;
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/**
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* This method gets called when the tokens have been consumed, and it's time
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* to build the model via the content sink.
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* @update gess5/11/98
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* @return error code -- 0 if model building went well .
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*/
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NS_IMETHOD BuildModel(void) = 0;
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/**
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* Call this method to cancel any pending parsing events.
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* Parsing events may be pending if all of the document's content
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* has been passed to the parser but the parser has been interrupted
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* because processing the tokens took too long.
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*
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* @update kmcclusk 05/18/01
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* @return NS_OK if succeeded else ERROR.
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*/
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NS_IMETHOD CancelParsingEvents() = 0;
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virtual void Reset() = 0;
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/**
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* True if the insertion point (per HTML5) is defined.
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*/
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virtual bool IsInsertionPointDefined() = 0;
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/**
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* Call immediately before starting to evaluate a parser-inserted script or
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* in general when the spec says to increment the script nesting level.
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*/
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virtual void IncrementScriptNestingLevel() = 0;
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/**
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* Call immediately after having evaluated a parser-inserted script or
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* generally want to restore to the state before the last
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* IncrementScriptNestingLevel call.
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*/
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virtual void DecrementScriptNestingLevel() = 0;
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/**
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* True if this is an HTML5 parser whose script nesting level (in
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* the sense of
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* <https://html.spec.whatwg.org/multipage/parsing.html#script-nesting-level>)
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* is nonzero.
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*/
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virtual bool HasNonzeroScriptNestingLevel() const = 0;
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/**
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* Marks the HTML5 parser as not a script-created parser.
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*/
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virtual void MarkAsNotScriptCreated(const char* aCommand) = 0;
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/**
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* True if this is a script-created HTML5 parser.
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*/
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virtual bool IsScriptCreated() = 0;
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(nsIParser, NS_IPARSER_IID)
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/* ===========================================================*
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Some useful constants...
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* ===========================================================*/
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#define NS_IPARSER_FLAG_XML 0x00000200
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#define NS_IPARSER_FLAG_HTML 0x00000400
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#endif
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