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/* -*- 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/. */
#ifndef nsIHTMLContentSink_h___
#define nsIHTMLContentSink_h___
/**
* This interface is OBSOLETE and in the process of being REMOVED.
* Do NOT implement!
*
* 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 precedes 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 <BODY> 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 \
{ 0xb6d6ae00, 0x0884, 0x4a30, \
{ 0xa8, 0xb4, 0xce, 0xca, 0x57, 0x27, 0x1a, 0x3e } }
/**
* This interface is OBSOLETE and in the process of being REMOVED.
* Do NOT implement!
*/
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 <meta>
* 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(int32_t 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(int32_t aPosition) = 0;
/**
* @update 01/09/2003 harishd
* @param aTag - Check if this tag is enabled or not.
*/
NS_IMETHOD IsEnabled(int32_t aTag, bool* aReturn) = 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;
};
NS_DEFINE_STATIC_IID_ACCESSOR(nsIHTMLContentSink, NS_IHTML_CONTENT_SINK_IID)
#endif /* nsIHTMLContentSink_h___ */