зеркало из https://github.com/mozilla/gecko-dev.git
168 строки
5.9 KiB
C++
168 строки
5.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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/**
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* MODULE NOTES:
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* @update gess 4/1/98
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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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* OpenXXX method: OpenHTML,OpenHead,OpenBody,OpenFrameSet;
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* likewise, the CloseXXX 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 preceeds 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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#ifndef NS_HTMLCONTENTSINK
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#define NS_HTMLCONTENTSINK
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#include "nsIParserNode.h"
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#include "nsIHTMLContentSink.h"
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#include "nsIContentSink.h"
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#include "nsString.h"
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#define NS_HTMLCONTENTSINK_IID \
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{0x803f8110, 0xc287, 0x11d1, \
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{0x80, 0x22, 0x00, 0x60, 0x08, 0x14, 0x98, 0x89}}
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class nsHTMLContentSink : public nsIHTMLContentSink {
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public:
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enum eSection {eNone=0,eHTML,eHead,eBody,eContainer};
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nsHTMLContentSink();
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~nsHTMLContentSink();
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NS_DECL_ISUPPORTS
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PRBool SetTitle(const nsString& aValue);
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// Called when Opening or closing the main HTML container
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PRInt32 OpenHTML(const nsIParserNode& aNode);
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PRInt32 CloseHTML(const nsIParserNode& aNode);
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// Called when Opening or closing the main HEAD container
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PRInt32 OpenHead(const nsIParserNode& aNode);
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PRInt32 CloseHead(const nsIParserNode& aNode);
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// Called when Opening or closing the main BODY container
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PRInt32 OpenBody(const nsIParserNode& aNode);
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PRInt32 CloseBody(const nsIParserNode& aNode);
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// Called when Opening or closing FORM containers
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PRInt32 OpenForm(const nsIParserNode& aNode);
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PRInt32 CloseForm(const nsIParserNode& aNode);
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// Called when Opening or closing the main FRAMESET container
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PRInt32 OpenFrameset(const nsIParserNode& aNode);
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PRInt32 CloseFrameset(const nsIParserNode& aNode);
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// Called when Opening or closing a general container
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// This includes: OL,UL,DIR,SPAN,TABLE,H[1..6],etc.
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// Until proven otherwise, I also plan to toss STYLE,
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// FRAME, SCRIPT, etc. here too!
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virtual PRInt32 OpenContainer(const nsIParserNode& aNode);
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virtual PRInt32 CloseContainer(const nsIParserNode& aNode);
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virtual PRInt32 CloseTopmostContainer();
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virtual PRInt32 AddLeaf(const nsIParserNode& aNode);
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/**
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* This method gets called when the parser begins the process
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* of building the content model via the content sink.
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*
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* @update 5/7/98 gess
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*/
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virtual void WillBuildModel(void);
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/**
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* This method gets called when the parser concludes the process
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* of building the content model via the content sink.
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*
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* @update 5/7/98 gess
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*/
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virtual void DidBuildModel(void);
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/**
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* This method gets called when the parser gets i/o blocked,
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* and wants to notify the sink that it may be a while before
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* more data is available.
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*
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* @update 5/7/98 gess
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*/
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virtual void WillInterrupt(void);
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/**
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* This method gets called when the parser i/o gets unblocked,
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* and we're about to start dumping content again to the sink.
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*
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* @update 5/7/98 gess
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*/
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virtual void WillResume(void);
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PRInt32 NodeAt(PRInt32 aPos) {return mNodeStack[aPos];}
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PRInt32 TopNode() {return mNodeStack[mNodeStackPos-1];}
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PRInt32 GetStackPos() {return mNodeStackPos;}
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protected:
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PRInt32 mNodeStack[100];
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PRInt32 mNodeStackPos;
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nsString mTitle;
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};
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#endif
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