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166 lines
5.5 KiB
C++
166 lines
5.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 nsIHTMLContentSink_h___
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#define nsIHTMLContentSink_h___
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/**
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* This interface is OBSOLETE and in the process of being REMOVED.
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* Do NOT implement!
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*
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* This file declares the concrete HTMLContentSink class.
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* This class is used during the parsing process as the
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* primary interface between the parser and the content
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* model.
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*
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* After the tokenizer completes, the parser iterates over
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* the known token list. As the parser identifies valid
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* elements, it calls the contentsink interface to notify
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* the content model that a new node or child node is being
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* created and added to the content model.
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*
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* The HTMLContentSink interface assumes 4 underlying
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* containers: HTML, HEAD, BODY and FRAMESET. Before
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* accessing any these, the parser will call the appropriate
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* OpennsIHTMLContentSink method: OpenHTML,OpenHead,OpenBody,OpenFrameSet;
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* likewise, the ClosensIHTMLContentSink version will be called when the
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* parser is done with a given section.
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*
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* IMPORTANT: The parser may Open each container more than
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* once! This is due to the irregular nature of HTML files.
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* For example, it is possible to encounter plain text at
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* the start of an HTML document (that precedes the HTML tag).
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* Such text is treated as if it were part of the body.
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* In such cases, the parser will Open the body, pass the text-
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* node in and then Close the body. The body will likely be
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* re-Opened later when the actual <BODY> tag has been seen.
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*
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* Containers within the body are Opened and Closed
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* using the OpenContainer(...) and CloseContainer(...) calls.
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* It is assumed that the document or contentSink is
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* maintaining its state to manage where new content should
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* be added to the underlying document.
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*
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* NOTE: OpenHTML() and OpenBody() may get called multiple times
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* in the same document. That's fine, and it doesn't mean
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* that we have multiple bodies or HTML's.
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*
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* NOTE: I haven't figured out how sub-documents (non-frames)
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* are going to be handled. Stay tuned.
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*/
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#include "nsIParserNode.h"
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#include "nsIContentSink.h"
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#include "nsHTMLTags.h"
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#define NS_IHTML_CONTENT_SINK_IID \
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{ 0xb6d6ae00, 0x0884, 0x4a30, \
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{ 0xa8, 0xb4, 0xce, 0xca, 0x57, 0x27, 0x1a, 0x3e } }
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/**
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* This interface is OBSOLETE and in the process of being REMOVED.
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* Do NOT implement!
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*/
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class nsIHTMLContentSink : public nsIContentSink
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{
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public:
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_IHTML_CONTENT_SINK_IID)
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/**
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* This method is used to open the HEAD container. It is useful if a tag
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* is forcing us to open the head (probably again), like if we find a <meta>
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* tag in the body.
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*/
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NS_IMETHOD OpenHead() = 0;
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/**
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* This gets called when handling illegal contents, especially
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* in dealing with tables. This method creates a new context.
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*
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* @update 04/04/99 harishd
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* @param aPosition - The position from where the new context begins.
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*/
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NS_IMETHOD BeginContext(int32_t aPosition) = 0;
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/**
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* This method terminates any new context that got created by
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* BeginContext and switches back to the main context.
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*
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* @update 04/04/99 harishd
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* @param aPosition - Validates the end of a context.
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*/
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NS_IMETHOD EndContext(int32_t aPosition) = 0;
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/**
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* @update 01/09/2003 harishd
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* @param aTag - Check if this tag is enabled or not.
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*/
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NS_IMETHOD IsEnabled(int32_t aTag, bool* aReturn) = 0;
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/**
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* This method is called when parser has
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* completed processing a chunk of tokens. The processing of the
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* tokens may be interrupted by returning NS_ERROR_HTMLPARSER_INTERRUPTED from
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* DidProcessAToken.
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*/
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NS_IMETHOD DidProcessTokens() = 0;
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/**
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* This method is called when parser is about to
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* process a single token
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*/
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NS_IMETHOD WillProcessAToken(void) = 0;
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/**
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* This method is called when parser has completed
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* the processing for a single token.
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* @return NS_OK if processing should not be interrupted
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* NS_ERROR_HTMLPARSER_INTERRUPTED if the parsing should be interrupted
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*/
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NS_IMETHOD DidProcessAToken(void) = 0;
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/**
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* This method is used to open a generic container in the sink.
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*
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* @update 4/1/98 gess
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* @param nsIParserNode reference to parser node interface
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*/
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NS_IMETHOD OpenContainer(const nsIParserNode& aNode) = 0;
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/**
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* This method gets called by the parser when a close
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* container tag has been consumed and needs to be closed.
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*
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* @param aTag - The tag to be closed.
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*/
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NS_IMETHOD CloseContainer(const nsHTMLTag aTag) = 0;
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/**
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* This method is used when we're closing a tag that was malformed
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* in some way. This way, the content sink can do special processing
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* (e.g., not execute a malformed script tag).
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*
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* @param aTag The tag to be closed.
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*/
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NS_IMETHOD CloseMalformedContainer(const nsHTMLTag aTag)
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{
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return CloseContainer(aTag);
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}
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/**
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* This gets called by the parser when you want to add
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* a leaf node to the current container in the content
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* model.
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*
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* @update 4/1/98 gess
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* @param nsIParserNode reference to parser node interface
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*/
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NS_IMETHOD AddLeaf(const nsIParserNode& aNode) = 0;
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(nsIHTMLContentSink, NS_IHTML_CONTENT_SINK_IID)
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#endif /* nsIHTMLContentSink_h___ */
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