gecko-dev/parser/htmlparser/nsIParser.h

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