gecko/parser/html/nsHtml5Parser.h

424 lines
12 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Henri Sivonen <hsivonen@iki.fi>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef NS_HTML5_PARSER__
#define NS_HTML5_PARSER__
#include "nsAutoPtr.h"
#include "nsIParser.h"
#include "nsDeque.h"
#include "nsIURL.h"
#include "nsParserCIID.h"
#include "nsITokenizer.h"
#include "nsThreadUtils.h"
#include "nsIContentSink.h"
#include "nsIParserFilter.h"
#include "nsIRequest.h"
#include "nsIChannel.h"
#include "nsCOMArray.h"
#include "nsContentSink.h"
#include "nsIHTMLDocument.h"
#include "nsCycleCollectionParticipant.h"
#include "nsIInputStream.h"
#include "nsDetectionConfident.h"
#include "nsHtml5OwningUTF16Buffer.h"
#include "nsHtml5TreeOpExecutor.h"
#include "nsHtml5StreamParser.h"
#include "nsHtml5AtomTable.h"
#include "nsWeakReference.h"
class nsHtml5Parser : public nsIParser,
public nsSupportsWeakReference
{
public:
NS_DECL_AND_IMPL_ZEROING_OPERATOR_NEW
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(nsHtml5Parser, nsIParser)
nsHtml5Parser();
virtual ~nsHtml5Parser();
/* Start nsIParser */
/**
* No-op for backwards compat.
*/
NS_IMETHOD_(void) SetContentSink(nsIContentSink* aSink);
/**
* Returns the tree op executor for backwards compat.
*/
NS_IMETHOD_(nsIContentSink*) GetContentSink();
/**
* Always returns "view" for backwards compat.
*/
NS_IMETHOD_(void) GetCommand(nsCString& aCommand);
/**
* No-op for backwards compat.
*/
NS_IMETHOD_(void) SetCommand(const char* aCommand);
/**
* No-op for backwards compat.
*/
NS_IMETHOD_(void) SetCommand(eParserCommands aParserCommand);
/**
* Call this method once you've created a parser, and want to instruct it
* about what charset to load
*
* @param aCharset the charset of a document
* @param aCharsetSource the source of the charset
*/
NS_IMETHOD_(void) SetDocumentCharset(const nsACString& aCharset, PRInt32 aSource);
/**
* Don't call. For interface compat only.
*/
NS_IMETHOD_(void) GetDocumentCharset(nsACString& aCharset, PRInt32& aSource)
{
NS_NOTREACHED("No one should call this.");
}
/**
* No-op for backwards compat.
*/
NS_IMETHOD_(void) SetParserFilter(nsIParserFilter* aFilter);
/**
* Get the channel associated with this parser
* @param aChannel out param that will contain the result
* @return NS_OK if successful or NS_NOT_AVAILABLE if not
*/
NS_IMETHOD GetChannel(nsIChannel** aChannel);
/**
* Return |this| for backwards compat.
*/
NS_IMETHOD GetDTD(nsIDTD** aDTD);
/**
* Get the stream parser for this parser
*/
virtual nsIStreamListener* GetStreamListener();
/**
* Don't call. For interface compat only.
*/
NS_IMETHOD ContinueInterruptedParsing();
/**
* Blocks the parser.
*/
NS_IMETHOD_(void) BlockParser();
/**
* Unblocks the parser.
*/
NS_IMETHOD_(void) UnblockParser();
/**
* Query whether the parser is enabled (i.e. not blocked) or not.
*/
NS_IMETHOD_(bool) IsParserEnabled();
/**
* Query whether the parser thinks it's done with parsing.
*/
NS_IMETHOD_(bool) IsComplete();
/**
* Set up request observer.
*
* @param aURL ignored (for interface compat only)
* @param aListener a listener to forward notifications to
* @param aKey the root context key (used for document.write)
* @param aMode ignored (for interface compat only)
*/
NS_IMETHOD Parse(nsIURI* aURL,
nsIRequestObserver* aListener = nsnull,
void* aKey = 0,
nsDTDMode aMode = eDTDMode_autodetect);
/**
* document.write and document.close
*
* @param aSourceBuffer the argument of document.write (empty for .close())
* @param aKey a key unique to the script element that caused this call
* @param aContentType "text/html" for HTML mode, else text/plain mode
* @param aLastCall true if .close() false if .write()
* @param aMode ignored (for interface compat only)
*/
NS_IMETHOD Parse(const nsAString& aSourceBuffer,
void* aKey,
const nsACString& aContentType,
bool aLastCall,
nsDTDMode aMode = eDTDMode_autodetect);
/**
* Gets the key passed to initial Parse()
*/
NS_IMETHOD_(void *) GetRootContextKey();
/**
* Stops the parser prematurely
*/
NS_IMETHOD Terminate();
/**
* Don't call. For interface backwards compat only.
*/
NS_IMETHOD ParseFragment(const nsAString& aSourceBuffer,
nsTArray<nsString>& aTagStack);
/**
* Don't call. For interface compat only.
*/
NS_IMETHOD BuildModel();
/**
* Don't call. For interface compat only.
*/
NS_IMETHODIMP CancelParsingEvents();
/**
* Sets the state to initial values
*/
virtual void Reset();
/**
* True in fragment mode and during synchronous document.write
*/
virtual bool CanInterrupt();
/**
* True if the insertion point (per HTML5) is defined.
*/
virtual bool IsInsertionPointDefined();
/**
* Call immediately before starting to evaluate a parser-inserted script.
*/
virtual void BeginEvaluatingParserInsertedScript();
/**
* Call immediately after having evaluated a parser-inserted script.
*/
virtual void EndEvaluatingParserInsertedScript();
/**
* Marks the HTML5 parser as not a script-created parser: Prepares the
* parser to be able to read a stream.
*
* @param aCommand the parser command (Yeah, this is bad API design. Let's
* make this better when retiring nsIParser)
*/
virtual void MarkAsNotScriptCreated(const char* aCommand);
/**
* True if this is a script-created HTML5 parser.
*/
virtual bool IsScriptCreated();
/* End nsIParser */
/**
* Invoke the fragment parsing algorithm (innerHTML).
*
* @param aSourceBuffer the string being set as innerHTML
* @param aTargetNode the target container
* @param aContextLocalName local name of context node
* @param aContextNamespace namespace of context node
* @param aQuirks true to make <table> not close <p>
* @param aPreventScriptExecution true to prevent scripts from executing;
* don't set to false when parsing into a target node that has been bound
* to tree.
*/
nsresult ParseHtml5Fragment(const nsAString& aSourceBuffer,
nsIContent* aTargetNode,
nsIAtom* aContextLocalName,
PRInt32 aContextNamespace,
bool aQuirks,
bool aPreventScriptExecution);
// Not from an external interface
// Non-inherited methods
public:
/**
* Initializes the parser to load from a channel.
*/
virtual nsresult Initialize(nsIDocument* aDoc,
nsIURI* aURI,
nsISupports* aContainer,
nsIChannel* aChannel);
inline nsHtml5Tokenizer* GetTokenizer() {
return mTokenizer;
}
void InitializeDocWriteParserState(nsAHtml5TreeBuilderState* aState, PRInt32 aLine);
void DropStreamParser() {
if (mStreamParser) {
mStreamParser->DropTimer();
mStreamParser = nsnull;
}
}
void StartTokenizer(bool aScriptingEnabled);
void ContinueAfterFailedCharsetSwitch();
nsHtml5StreamParser* GetStreamParser() {
return mStreamParser;
}
/**
* Parse until pending data is exhausted or a script blocks the parser
*/
void ParseUntilBlocked();
private:
// State variables
/**
* Whether the last character tokenized was a carriage return (for CRLF)
*/
bool mLastWasCR;
/**
* Whether the last character tokenized was a carriage return (for CRLF)
* when preparsing document.write.
*/
bool mDocWriteSpeculativeLastWasCR;
/**
* The parser is in the fragment mode
*/
bool mFragmentMode;
/**
* The parser is blocking on a script
*/
bool mBlocked;
/**
* Whether the document.write() speculator is already active.
*/
bool mDocWriteSpeculatorActive;
/**
* The number of parser-inserted script currently being evaluated.
*/
PRInt32 mParserInsertedScriptsBeingEvaluated;
/**
* True if document.close() has been called.
*/
bool mDocumentClosed;
bool mInDocumentWrite;
// Gecko integration
void* mRootContextKey;
// Portable parser objects
/**
* The first buffer in the pending UTF-16 buffer queue
*/
nsRefPtr<nsHtml5OwningUTF16Buffer> mFirstBuffer;
/**
* The last buffer in the pending UTF-16 buffer queue. Always points
* to a sentinel object with nsnull as its parser key.
*/
nsHtml5OwningUTF16Buffer* mLastBuffer; // weak ref;
/**
* The tree operation executor
*/
nsRefPtr<nsHtml5TreeOpExecutor> mExecutor;
/**
* The HTML5 tree builder
*/
const nsAutoPtr<nsHtml5TreeBuilder> mTreeBuilder;
/**
* The HTML5 tokenizer
*/
const nsAutoPtr<nsHtml5Tokenizer> mTokenizer;
/**
* Another HTML5 tree builder for preloading document.written content.
*/
nsAutoPtr<nsHtml5TreeBuilder> mDocWriteSpeculativeTreeBuilder;
/**
* Another HTML5 tokenizer for preloading document.written content.
*/
nsAutoPtr<nsHtml5Tokenizer> mDocWriteSpeculativeTokenizer;
/**
* The stream parser.
*/
nsRefPtr<nsHtml5StreamParser> mStreamParser;
/**
*
*/
PRInt32 mRootContextLineNumber;
/**
* Whether it's OK to transfer parsing back to the stream parser
*/
bool mReturnToStreamParserPermitted;
/**
* The scoped atom table
*/
nsHtml5AtomTable mAtomTable;
};
#endif