/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* ***** 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 Communicator client 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): * * 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 nsIHTMLContentSink_h___ #define nsIHTMLContentSink_h___ /** * This file declares the concrete HTMLContentSink class. * This class is used during the parsing process as the * primary interface between the parser and the content * model. * * After the tokenizer completes, the parser iterates over * the known token list. As the parser identifies valid * elements, it calls the contentsink interface to notify * the content model that a new node or child node is being * created and added to the content model. * * The HTMLContentSink interface assumes 4 underlying * containers: HTML, HEAD, BODY and FRAMESET. Before * accessing any these, the parser will call the appropriate * OpennsIHTMLContentSink method: OpenHTML,OpenHead,OpenBody,OpenFrameSet; * likewise, the ClosensIHTMLContentSink version will be called when the * parser is done with a given section. * * IMPORTANT: The parser may Open each container more than * once! This is due to the irregular nature of HTML files. * For example, it is possible to encounter plain text at * the start of an HTML document (that preceeds the HTML tag). * Such text is treated as if it were part of the body. * In such cases, the parser will Open the body, pass the text- * node in and then Close the body. The body will likely be * re-Opened later when the actual tag has been seen. * * Containers within the body are Opened and Closed * using the OpenContainer(...) and CloseContainer(...) calls. * It is assumed that the document or contentSink is * maintaining its state to manage where new content should * be added to the underlying document. * * NOTE: OpenHTML() and OpenBody() may get called multiple times * in the same document. That's fine, and it doesn't mean * that we have multiple bodies or HTML's. * * NOTE: I haven't figured out how sub-documents (non-frames) * are going to be handled. Stay tuned. */ #include "nsIParserNode.h" #include "nsIContentSink.h" #include "nsHTMLTags.h" #define NS_IHTML_CONTENT_SINK_IID \ { 0x73b5a072, 0x0f87, 0x4d07, \ { 0xa8, 0x16, 0xe6, 0xac, 0x73, 0xa7, 0x04, 0x3c } } #if defined(XP_MAC) || defined(WINCE) #define MAX_REFLOW_DEPTH 75 //setting to 75 to prevent layout from crashing on mac. Bug 55095. //We will also change this for WinCE as it usually has a strict //memory upper limit (no vm, ~32mb) #else #define MAX_REFLOW_DEPTH 200 //windows and linux (etc) can do much deeper structures. #endif class nsIHTMLContentSink : public nsIContentSink { public: NS_DECLARE_STATIC_IID_ACCESSOR(NS_IHTML_CONTENT_SINK_IID) /** * This method is used to open the HEAD container. It is useful if a tag * is forcing us to open the head (probably again), like if we find a * tag in the body. */ NS_IMETHOD OpenHead() = 0; /** * This gets called when handling illegal contents, especially * in dealing with tables. This method creates a new context. * * @update 04/04/99 harishd * @param aPosition - The position from where the new context begins. */ NS_IMETHOD BeginContext(PRInt32 aPosition) = 0; /** * This method terminates any new context that got created by * BeginContext and switches back to the main context. * * @update 04/04/99 harishd * @param aPosition - Validates the end of a context. */ NS_IMETHOD EndContext(PRInt32 aPosition) = 0; /** * @update 01/09/2003 harishd * @param aTag - Check if this tag is enabled or not. */ NS_IMETHOD IsEnabled(PRInt32 aTag, PRBool* aReturn) = 0; /** * This method is called when parser is about to begin * synchronously processing a chunk of tokens. */ NS_IMETHOD WillProcessTokens(void) = 0; /** * This method is called when parser has * completed processing a chunk of tokens. The processing of the * tokens may be interrupted by returning NS_ERROR_HTMLPARSER_INTERRUPTED from * DidProcessAToken. */ NS_IMETHOD DidProcessTokens() = 0; /** * This method is called when parser is about to * process a single token */ NS_IMETHOD WillProcessAToken(void) = 0; /** * This method is called when parser has completed * the processing for a single token. * @return NS_OK if processing should not be interrupted * NS_ERROR_HTMLPARSER_INTERRUPTED if the parsing should be interrupted */ NS_IMETHOD DidProcessAToken(void) = 0; /** * This method is used to open a generic container in the sink. * * @update 4/1/98 gess * @param nsIParserNode reference to parser node interface */ NS_IMETHOD OpenContainer(const nsIParserNode& aNode) = 0; /** * This method gets called by the parser when a close * container tag has been consumed and needs to be closed. * * @param aTag - The tag to be closed. */ NS_IMETHOD CloseContainer(const nsHTMLTag aTag) = 0; /** * This method is used when we're closing a tag that was malformed * in some way. This way, the content sink can do special processing * (e.g., not execute a malformed script tag). * * @param aTag The tag to be closed. */ NS_IMETHOD CloseMalformedContainer(const nsHTMLTag aTag) { return CloseContainer(aTag); } /** * This gets called by the parser when you want to add * a leaf node to the current container in the content * model. * * @update 4/1/98 gess * @param nsIParserNode reference to parser node interface */ NS_IMETHOD AddLeaf(const nsIParserNode& aNode) = 0; /** * This gets called by the parser when you want to add * a leaf node to the current container in the content * model. * * @update 4/1/98 gess * @param nsIParserNode reference to parser node interface */ NS_IMETHOD AddComment(const nsIParserNode& aNode) = 0; /** * This gets called by the parser when you want to add * a leaf node to the current container in the content * model. * * @update 4/1/98 gess * @param nsIParserNode reference to parser node interface */ NS_IMETHOD AddProcessingInstruction(const nsIParserNode& aNode) = 0; /** * This method is called by the parser when it encounters * a document type declaration. * * XXX Should the parser also parse the internal subset? * * @param nsIParserNode reference to parser node interface */ NS_IMETHOD AddDocTypeDecl(const nsIParserNode& aNode) = 0; /** * This gets called by the parser to notify observers of * the tag * * @param aErrorResult the error code */ NS_IMETHOD NotifyTagObservers(nsIParserNode* aNode) = 0; /** * Call this method to determnine if a FORM is on the sink's stack * * @return PR_TRUE if found else PR_FALSE */ NS_IMETHOD_(PRBool) IsFormOnStack() = 0; }; NS_DEFINE_STATIC_IID_ACCESSOR(nsIHTMLContentSink, NS_IHTML_CONTENT_SINK_IID) #endif /* nsIHTMLContentSink_h___ */