зеркало из https://github.com/mozilla/pjs.git
3121 строка
94 KiB
C++
3121 строка
94 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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#include "nsIDTDDebug.h"
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#include "CNavDTD.h"
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#include "nsHTMLTokens.h"
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#include "nsCRT.h"
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#include "nsParser.h"
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#include "nsIHTMLContentSink.h"
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#include "nsScanner.h"
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#include "nsParserTypes.h"
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#include "nsVoidArray.h"
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#include "nsTokenHandler.h"
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#include "nsIDTDDebug.h"
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#include "prenv.h" //this is here for debug reasons...
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#include "prtypes.h" //this is here for debug reasons...
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#include "prio.h"
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#include "plstr.h"
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#include "nsDTDUtils.h"
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#ifdef XP_PC
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#include <direct.h> //this is here for debug reasons...
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#endif
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#include "prmem.h"
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static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);
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static NS_DEFINE_IID(kIDTDIID, NS_IDTD_IID);
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static NS_DEFINE_IID(kClassIID, NS_INAVHTML_DTD_IID);
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//static const char* kNullURL = "Error: Null URL given";
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//static const char* kNullFilename= "Error: Null filename given";
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static const char* kNullToken = "Error: Null token given";
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static const char* kInvalidTagStackPos = "Error: invalid tag stack position";
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static const char* kHTMLTextContentType = "text/html";
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static char* kVerificationDir = "c:/temp";
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static nsAutoString gEmpty;
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static eHTMLTags gFormElementTags[]= {
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eHTMLTag_button, eHTMLTag_fieldset, eHTMLTag_input,
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eHTMLTag_isindex, eHTMLTag_label, eHTMLTag_legend,
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eHTMLTag_option, eHTMLTag_select, eHTMLTag_textarea};
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static eHTMLTags gHeadingTags[]={
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eHTMLTag_h1, eHTMLTag_h2, eHTMLTag_h3,
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eHTMLTag_h4, eHTMLTag_h5, eHTMLTag_h6};
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static eHTMLTags gStyleTags[]={
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eHTMLTag_a, eHTMLTag_acronym, eHTMLTag_b,
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eHTMLTag_bdo, eHTMLTag_big, eHTMLTag_blink,
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eHTMLTag_center, eHTMLTag_cite, eHTMLTag_code,
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eHTMLTag_del, eHTMLTag_dfn, eHTMLTag_em,
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eHTMLTag_font, eHTMLTag_i, eHTMLTag_ins,
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eHTMLTag_kbd, eHTMLTag_nobr, eHTMLTag_q,
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eHTMLTag_s, eHTMLTag_samp, eHTMLTag_small,
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eHTMLTag_span, eHTMLTag_strike, eHTMLTag_strong,
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eHTMLTag_sub, eHTMLTag_sup, eHTMLTag_tt,
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eHTMLTag_u, eHTMLTag_var};
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static eHTMLTags gNonContainers[]={
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eHTMLTag_area, eHTMLTag_base, eHTMLTag_basefont,
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eHTMLTag_br, eHTMLTag_col, eHTMLTag_embed,
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eHTMLTag_frame, eHTMLTag_hr, eHTMLTag_whitespace,
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eHTMLTag_input, eHTMLTag_link, eHTMLTag_isindex,
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eHTMLTag_meta, eHTMLTag_param, eHTMLTag_plaintext,
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eHTMLTag_style, eHTMLTag_spacer, eHTMLTag_wbr,
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eHTMLTag_newline, eHTMLTag_text, eHTMLTag_img,
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eHTMLTag_unknown, eHTMLTag_xmp};
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static eHTMLTags gTableTags[]={
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eHTMLTag_caption, eHTMLTag_col, eHTMLTag_colgroup, eHTMLTag_tbody,
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eHTMLTag_tfoot, eHTMLTag_tr, eHTMLTag_thead, eHTMLTag_td};
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static eHTMLTags gWhitespaceTags[]={
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eHTMLTag_newline, eHTMLTag_whitespace};
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/**************************************************************
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Now define the token deallocator class...
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**************************************************************/
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class CNavTokenDeallocator: public nsDequeFunctor{
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public:
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virtual void* operator()(void* anObject) {
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CToken* aToken = (CToken*)anObject;
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delete aToken;
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return 0;
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}
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};
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static CNavTokenDeallocator gTokenKiller;
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/**************************************************************
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Now define the tokenrecycler class...
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**************************************************************/
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/************************************************************************
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CTokenRecycler class implementation.
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This class is used to recycle tokens.
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By using this simple class, we cut WAY down on the number of tokens
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that get created during the run of the system.
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************************************************************************/
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class nsCTokenRecycler : public nsITokenRecycler {
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public:
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// enum {eCacheMaxSize=100};
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nsCTokenRecycler();
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virtual ~nsCTokenRecycler();
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virtual void RecycleToken(CToken* aToken);
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virtual CToken* CreateTokenOfType(eHTMLTokenTypes aType,eHTMLTags aTag, const nsString& aString);
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protected:
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nsDeque* mTokenCache[eToken_last-1];
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// PRInt32 mTotals[eToken_last-1];
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};
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/**
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*
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* @update gess7/25/98
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* @param
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*/
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nsCTokenRecycler::nsCTokenRecycler() : nsITokenRecycler() {
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int i=0;
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for(i=0;i<eToken_last-1;i++) {
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mTokenCache[i]=new nsDeque(gTokenKiller);
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// mTotals[i]=0;
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}
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}
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/**
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* Destructor for the token factory
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* @update gess7/25/98
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*/
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nsCTokenRecycler::~nsCTokenRecycler() {
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//begin by deleting all the known (recycled) tokens...
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//We're also deleting the cache-deques themselves.
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int i;
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for(i=0;i<eToken_last-1;i++) {
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delete mTokenCache[i];
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}
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}
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/**
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* This method gets called when someone wants to recycle a token
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* @update gess7/24/98
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* @param aToken -- token to be recycled.
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* @return nada
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*/
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void nsCTokenRecycler::RecycleToken(CToken* aToken) {
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if(aToken) {
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PRInt32 theType=aToken->GetTokenType();
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mTokenCache[theType-1]->Push(aToken);
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}
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}
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/**
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*
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* @update gess8/4/98
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* @param
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* @return
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*/
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CToken* nsCTokenRecycler::CreateTokenOfType(eHTMLTokenTypes aType,eHTMLTags aTag, const nsString& aString) {
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CToken* result=(CToken*)mTokenCache[aType-1]->Pop();
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if(result) {
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result->Reinitialize(aTag,aString);
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}
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else {
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// mTotals[aType-1]++;
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switch(aType){
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case eToken_start: result=new CStartToken(aTag); break;
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case eToken_end: result=new CEndToken(aTag); break;
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case eToken_comment: result=new CCommentToken(); break;
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case eToken_attribute: result=new CAttributeToken(); break;
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case eToken_entity: result=new CEntityToken(); break;
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case eToken_whitespace: result=new CWhitespaceToken(); break;
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case eToken_newline: result=new CNewlineToken(); break;
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case eToken_text: result=new CTextToken(aString); break;
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case eToken_script: result=new CScriptToken(); break;
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case eToken_style: result=new CStyleToken(); break;
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case eToken_skippedcontent: result=new CSkippedContentToken(aString); break;
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case eToken_instruction:result=new CInstructionToken(); break;
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default:
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break;
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}
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}
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return result;
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}
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nsCTokenRecycler gTokenRecycler;
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/************************************************************************
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And now for the main class -- CNavDTD...
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************************************************************************/
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/**
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* This method gets called as part of our COM-like interfaces.
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* Its purpose is to create an interface to parser object
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* of some type.
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*
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* @update gess 4/8/98
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* @param nsIID id of object to discover
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* @param aInstancePtr ptr to newly discovered interface
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* @return NS_xxx result code
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*/
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nsresult CNavDTD::QueryInterface(const nsIID& aIID, void** aInstancePtr)
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{
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if (NULL == aInstancePtr) {
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return NS_ERROR_NULL_POINTER;
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}
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if(aIID.Equals(kISupportsIID)) { //do IUnknown...
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*aInstancePtr = (nsIDTD*)(this);
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}
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else if(aIID.Equals(kIDTDIID)) { //do IParser base class...
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*aInstancePtr = (nsIDTD*)(this);
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}
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else if(aIID.Equals(kClassIID)) { //do this class...
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*aInstancePtr = (CNavDTD*)(this);
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}
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else {
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*aInstancePtr=0;
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return NS_NOINTERFACE;
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}
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NS_ADDREF_THIS();
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return NS_OK;
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}
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/**
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* This method is defined in nsIParser. It is used to
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* cause the COM-like construction of an nsParser.
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*
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* @update gess 4/8/98
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* @param nsIParser** ptr to newly instantiated parser
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* @return NS_xxx error result
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*/
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NS_HTMLPARS nsresult NS_NewNavHTMLDTD(nsIDTD** aInstancePtrResult)
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{
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CNavDTD* it = new CNavDTD();
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if (it == 0) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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return it->QueryInterface(kClassIID, (void **) aInstancePtrResult);
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}
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NS_IMPL_ADDREF(CNavDTD)
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NS_IMPL_RELEASE(CNavDTD)
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/**
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*
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*
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* @update gess 6/9/98
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* @param
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* @return
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*/
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PRInt32 NavDispatchTokenHandler(CToken* aToken,nsIDTD* aDTD) {
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PRInt32 result=0;
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CHTMLToken* theToken= (CHTMLToken*)(aToken);
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eHTMLTokenTypes theType= (eHTMLTokenTypes)theToken->GetTokenType();
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CNavDTD* theDTD=(CNavDTD*)aDTD;
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if(aDTD) {
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switch(theType) {
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case eToken_start:
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result=theDTD->HandleStartToken(aToken); break;
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case eToken_end:
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result=theDTD->HandleEndToken(aToken); break;
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case eToken_comment:
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result=theDTD->HandleCommentToken(aToken); break;
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case eToken_entity:
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result=theDTD->HandleEntityToken(aToken); break;
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case eToken_whitespace:
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result=theDTD->HandleStartToken(aToken); break;
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case eToken_newline:
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result=theDTD->HandleStartToken(aToken); break;
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case eToken_text:
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result=theDTD->HandleStartToken(aToken); break;
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case eToken_attribute:
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result=theDTD->HandleAttributeToken(aToken); break;
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case eToken_style:
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result=theDTD->HandleStyleToken(aToken); break;
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case eToken_skippedcontent:
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result=theDTD->HandleSkippedContentToken(aToken); break;
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case eToken_instruction:
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result=theDTD->HandleProcessingInstructionToken(aToken); break;
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default:
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result=0;
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}//switch
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}//if
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return result;
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}
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/**
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* init the set of default token handlers...
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*
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* @update gess 3/25/98
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* @param
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* @return
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*/
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void CNavDTD::InitializeDefaultTokenHandlers() {
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AddTokenHandler(new CTokenHandler(NavDispatchTokenHandler,eToken_start));
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AddTokenHandler(new CTokenHandler(NavDispatchTokenHandler,eToken_end));
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AddTokenHandler(new CTokenHandler(NavDispatchTokenHandler,eToken_comment));
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AddTokenHandler(new CTokenHandler(NavDispatchTokenHandler,eToken_entity));
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AddTokenHandler(new CTokenHandler(NavDispatchTokenHandler,eToken_whitespace));
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AddTokenHandler(new CTokenHandler(NavDispatchTokenHandler,eToken_newline));
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AddTokenHandler(new CTokenHandler(NavDispatchTokenHandler,eToken_text));
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AddTokenHandler(new CTokenHandler(NavDispatchTokenHandler,eToken_attribute));
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// AddTokenHandler(new CTokenHandler(NavDispatchTokenHandler,eToken_script));
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AddTokenHandler(new CTokenHandler(NavDispatchTokenHandler,eToken_style));
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AddTokenHandler(new CTokenHandler(NavDispatchTokenHandler,eToken_skippedcontent));
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AddTokenHandler(new CTokenHandler(NavDispatchTokenHandler,eToken_instruction));
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}
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/**
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* Default constructor
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*
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* @update gess 4/9/98
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* @param
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* @return
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*/
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CNavDTD::CNavDTD() : nsIDTD(), mTokenDeque(gTokenKiller) {
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NS_INIT_REFCNT();
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mParser=0;
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mSink = nsnull;
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mDTDDebug=0;
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mLineNumber=1;
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mParseMode=eParseMode_navigator;
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nsCRT::zero(mTokenHandlers,sizeof(mTokenHandlers));
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mHasOpenForm=PR_FALSE;
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mHasOpenMap=PR_FALSE;
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InitializeDefaultTokenHandlers();
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mHeadContext=new nsDTDContext();
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mBodyContext=new nsDTDContext();
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mFormContext=0;
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mMapContext=0;
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}
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/**
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* Default destructor
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*
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* @update gess 4/9/98
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* @param
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* @return
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*/
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CNavDTD::~CNavDTD(){
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DeleteTokenHandlers();
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delete mHeadContext;
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delete mBodyContext;
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NS_IF_RELEASE(mDTDDebug);
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}
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/**
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* Call this method if you want the DTD to construct a fresh
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* instance of itself.
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* @update gess7/23/98
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* @param
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* @return
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*/
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nsresult CNavDTD::CreateNewInstance(nsIDTD** aInstancePtrResult){
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return NS_NewNavHTMLDTD(aInstancePtrResult);
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}
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/**
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*
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* @update gess8/4/98
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* @param
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* @return
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*/
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nsITokenRecycler* CNavDTD::GetTokenRecycler(void){
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// return 0;
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return &gTokenRecycler;
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}
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/**
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* Called by the parser to initiate dtd verification of the
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* internal context stack.
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* @update gess 7/23/98
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* @param
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* @return
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*/
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PRBool CNavDTD::Verify(nsString& aURLRef){
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PRBool result=PR_TRUE;
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if(!mDTDDebug){;
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nsresult rval = NS_NewDTDDebug(&mDTDDebug);
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if (NS_OK != rval) {
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fputs("Cannot create parser debugger.\n", stdout);
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result=-PR_FALSE;
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}
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else mDTDDebug->SetVerificationDirectory(kVerificationDir);
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}
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if(mDTDDebug) {
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mDTDDebug->Verify(this,mParser,
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mBodyContext->mElements.mCount,
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mBodyContext->mElements.mTags,aURLRef);
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}
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return result;
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}
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/**
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* This method is called to determine if the given DTD can parse
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* a document in a given source-type.
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* NOTE: Parsing always assumes that the end result will involve
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* storing the result in the main content model.
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* @update gess6/24/98
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* @param
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* @return TRUE if this DTD can satisfy the request; FALSE otherwise.
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*/
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PRBool CNavDTD::CanParse(nsString& aContentType, PRInt32 aVersion){
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PRBool result=aContentType.Equals(kHTMLTextContentType);
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return result;
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}
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/**
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*
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* @update gess7/7/98
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* @param
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* @return
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*/
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eAutoDetectResult CNavDTD::AutoDetectContentType(nsString& aBuffer,nsString& aType){
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eAutoDetectResult result=eUnknownDetect;
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if(PR_TRUE==aType.Equals(kHTMLTextContentType))
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result=eValidDetect;
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return result;
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}
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/**
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*
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* @update gess5/18/98
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* @param
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* @return
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*/
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nsresult CNavDTD::WillBuildModel(nsString& aFilename,PRBool aNotifySink){
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nsresult result=NS_OK;
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mFilename=aFilename;
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if((aNotifySink) && (mSink)) {
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mLineNumber=1;
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result = mSink->WillBuildModel();
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}
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return result;
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}
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/**
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*
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* @update gess5/18/98
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* @param
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* @return
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*/
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nsresult CNavDTD::DidBuildModel(PRInt32 anErrorCode,PRBool aNotifySink){
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nsresult result= NS_OK;
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if((kNoError==anErrorCode) && (mBodyContext->mElements.mCount>0)) {
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result = CloseContainersTo(0,eHTMLTag_unknown,PR_FALSE);
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}
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if((aNotifySink) && (mSink)) {
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result = mSink->DidBuildModel(1);
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}
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if(mDTDDebug) {
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mDTDDebug->DumpVectorRecord();
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}
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return result;
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}
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/**
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* This big dispatch method is used to route token handler calls to the right place.
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* What's wrong with it? This table, and the dispatch methods themselves need to be
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* moved over to the delegate. Ah, so much to do...
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*
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* @update gess 5/21/98
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* @param aType
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* @param aToken
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* @param aParser
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* @return
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*/
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nsresult CNavDTD::HandleToken(CToken* aToken){
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nsresult result=NS_OK;
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if(aToken) {
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CHTMLToken* theToken= (CHTMLToken*)(aToken);
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eHTMLTokenTypes theType=eHTMLTokenTypes(theToken->GetTokenType());
|
|
CITokenHandler* theHandler=GetTokenHandler(theType);
|
|
|
|
if(theHandler) {
|
|
result=(*theHandler)(theToken,this);
|
|
if (mDTDDebug)
|
|
mDTDDebug->Verify(this, mParser, mBodyContext->mElements.mCount, mBodyContext->mElements.mTags, mFilename);
|
|
}
|
|
|
|
}//if
|
|
return result;
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* This method gets called when a start token has been
|
|
* encountered in the parse process. If the current container
|
|
* can contain this tag, then add it. Otherwise, you have
|
|
* two choices: 1) create an implicit container for this tag
|
|
* to be stored in
|
|
* 2) close the top container, and add this to
|
|
* whatever container ends up on top.
|
|
*
|
|
* @update gess 3/25/98
|
|
* @param aToken -- next (start) token to be handled
|
|
* @param aNode -- CParserNode representing this start token
|
|
* @return PR_TRUE if all went well; PR_FALSE if error occured
|
|
*/
|
|
nsresult CNavDTD::HandleDefaultStartToken(CToken* aToken,eHTMLTags aChildTag,nsIParserNode& aNode) {
|
|
NS_PRECONDITION(0!=aToken,kNullToken);
|
|
|
|
eHTMLTags theParentTag=mBodyContext->mElements.Last();
|
|
nsresult result=NS_OK;
|
|
PRBool contains=CanContain(theParentTag,aChildTag);
|
|
|
|
if(PR_FALSE==contains){
|
|
if(CanPropagate(theParentTag,aChildTag))
|
|
result=CreateContextStackFor(aChildTag);
|
|
else result=kCantPropagate;
|
|
if(NS_OK!=result) {
|
|
//if you're here, then the new topmost container can't contain aToken.
|
|
//You must determine what container hierarchy you need to hold aToken,
|
|
//and create that on the parsestack.
|
|
result=ReduceContextStackFor(aChildTag);
|
|
if(PR_FALSE==CanContain(mBodyContext->mElements.Last(),aChildTag)) {
|
|
//we unwound too far; now we have to recreate a valid context stack.
|
|
result=CreateContextStackFor(aChildTag);
|
|
}
|
|
}
|
|
}
|
|
|
|
if(IsContainer(aChildTag)){
|
|
if(PR_TRUE==mBodyContext->mElements.mBits[mBodyContext->mElements.mCount-1]) {
|
|
CloseTransientStyles(aChildTag);
|
|
}
|
|
result=OpenContainer(aNode,PR_TRUE);
|
|
}
|
|
else {
|
|
if(PR_FALSE==mBodyContext->mElements.mBits[mBodyContext->mElements.mCount-1]) {
|
|
OpenTransientStyles(aChildTag);
|
|
}
|
|
result=AddLeaf(aNode);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method gets called when a start token has been
|
|
* encountered in the parse process. If the current container
|
|
* can contain this tag, then add it. Otherwise, you have
|
|
* two choices: 1) create an implicit container for this tag
|
|
* to be stored in
|
|
* 2) close the top container, and add this to
|
|
* whatever container ends up on top.
|
|
*
|
|
* @update gess 3/25/98
|
|
* @param aToken -- next (start) token to be handled
|
|
* @param aNode -- CParserNode representing this start token
|
|
* @return PR_TRUE if all went well; PR_FALSE if error occured
|
|
*/
|
|
nsresult CNavDTD::HandleStartToken(CToken* aToken) {
|
|
NS_PRECONDITION(0!=aToken,kNullToken);
|
|
eHTMLTags tokenTagType=(eHTMLTags)aToken->GetTypeID();
|
|
|
|
//Begin by gathering up attributes...
|
|
nsCParserNode attrNode((CHTMLToken*)aToken,mLineNumber);
|
|
PRInt16 attrCount=aToken->GetAttributeCount();
|
|
nsresult result=(0==attrCount) ? NS_OK : CollectAttributes(attrNode,attrCount);
|
|
|
|
if(NS_OK==result) {
|
|
//now check to see if this token should be omitted...
|
|
if(PR_FALSE==CanOmit(mBodyContext->mElements.Last(),tokenTagType)) {
|
|
|
|
switch(tokenTagType) {
|
|
|
|
case eHTMLTag_title:
|
|
{
|
|
result=OpenHead(attrNode); //open the head...
|
|
if(NS_OK==result) {
|
|
PRInt32 theCount;
|
|
result=CollectSkippedContent(attrNode,theCount);
|
|
mSink->SetTitle(attrNode.GetSkippedContent());
|
|
result=CloseHead(attrNode); //close the head...
|
|
}
|
|
}
|
|
break;
|
|
|
|
case eHTMLTag_link:
|
|
case eHTMLTag_base:
|
|
case eHTMLTag_meta:
|
|
{
|
|
result=OpenHead(attrNode);
|
|
if(NS_OK==result)
|
|
result=AddLeaf(attrNode);
|
|
result=CloseHead(attrNode);
|
|
}
|
|
break;
|
|
|
|
case eHTMLTag_style:
|
|
{
|
|
result=OpenHead(attrNode);
|
|
if(NS_OK==result) {
|
|
PRInt32 theCount;
|
|
CollectSkippedContent(attrNode,theCount);
|
|
if(NS_OK==result) {
|
|
result=AddLeaf(attrNode);
|
|
if(NS_OK==result)
|
|
result=CloseHead(attrNode);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
case eHTMLTag_area:
|
|
if (mHasOpenMap) {
|
|
result = mSink->AddLeaf(attrNode);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
result=HandleDefaultStartToken(aToken,tokenTagType,attrNode);
|
|
break;
|
|
} //switch
|
|
} //if
|
|
} //if
|
|
|
|
if(eHTMLTag_newline==tokenTagType)
|
|
mLineNumber++;
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
* This method gets called when an end token has been
|
|
* encountered in the parse process. If the end tag matches
|
|
* the start tag on the stack, then simply close it. Otherwise,
|
|
* we have a erroneous state condition. This can be because we
|
|
* have a close tag with no prior open tag (user error) or because
|
|
* we screwed something up in the parse process. I'm not sure
|
|
* yet how to tell the difference.
|
|
*
|
|
* @update gess 3/25/98
|
|
* @param aToken -- next (start) token to be handled
|
|
* @return PR_TRUE if all went well; PR_FALSE if error occured
|
|
*/
|
|
nsresult CNavDTD::HandleEndToken(CToken* aToken) {
|
|
NS_PRECONDITION(0!=aToken,kNullToken);
|
|
|
|
nsresult result=NS_OK;
|
|
CEndToken* et = (CEndToken*)(aToken);
|
|
eHTMLTags tokenTagType=(eHTMLTags)et->GetTypeID();
|
|
|
|
|
|
// Here's the hacky part:
|
|
// Because we're trying to be backward compatible with Nav4/5,
|
|
// we have to handle explicit styles the way it does. That means
|
|
// that we keep an internal style stack.When an EndToken occurs,
|
|
// we should see if it is an explicit style tag. If so, we can
|
|
// close the explicit style tag (goofy, huh?)
|
|
|
|
|
|
//now check to see if this token should be omitted, or
|
|
//if it's gated from closing by the presence of another tag.
|
|
if(PR_TRUE==CanOmitEndTag(mBodyContext->mElements.Last(),tokenTagType)) {
|
|
UpdateStyleStackForCloseTag(tokenTagType,tokenTagType);
|
|
return result;
|
|
}
|
|
|
|
nsCParserNode theNode((CHTMLToken*)aToken,mLineNumber);
|
|
switch(tokenTagType) {
|
|
|
|
case eHTMLTag_style:
|
|
case eHTMLTag_link:
|
|
case eHTMLTag_meta:
|
|
case eHTMLTag_textarea:
|
|
case eHTMLTag_title:
|
|
case eHTMLTag_head:
|
|
case eHTMLTag_script:
|
|
break;
|
|
|
|
case eHTMLTag_map:
|
|
case eHTMLTag_form:
|
|
{
|
|
nsCParserNode aNode((CHTMLToken*)aToken,mLineNumber);
|
|
result=CloseContainer(aNode,tokenTagType,PR_FALSE);
|
|
}
|
|
break;
|
|
|
|
case eHTMLTag_td:
|
|
case eHTMLTag_th:
|
|
result=CloseContainersTo(tokenTagType,PR_TRUE);
|
|
// Empty the transient style stack (we just closed any extra
|
|
// ones off so it's safe to do it now) because they don't carry
|
|
// forward across table cell boundaries.
|
|
mBodyContext->mStyles->mCount=0;
|
|
break;
|
|
|
|
default:
|
|
if(IsContainer(tokenTagType)){
|
|
result=CloseContainersTo(tokenTagType,PR_TRUE);
|
|
}
|
|
//
|
|
break;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method gets called when an entity token has been
|
|
* encountered in the parse process.
|
|
*
|
|
* @update gess 3/25/98
|
|
* @param aToken -- next (start) token to be handled
|
|
* @return PR_TRUE if all went well; PR_FALSE if error occured
|
|
*/
|
|
nsresult CNavDTD::HandleEntityToken(CToken* aToken) {
|
|
NS_PRECONDITION(0!=aToken,kNullToken);
|
|
|
|
CEntityToken* et = (CEntityToken*)(aToken);
|
|
nsresult result=NS_OK;
|
|
|
|
if(PR_FALSE==CanOmit(mBodyContext->mElements.Last(),eHTMLTag_entity)) {
|
|
nsCParserNode aNode((CHTMLToken*)aToken,mLineNumber);
|
|
result=AddLeaf(aNode);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method gets called when a comment token has been
|
|
* encountered in the parse process. After making sure
|
|
* we're somewhere in the body, we handle the comment
|
|
* in the same code that we use for text.
|
|
*
|
|
* @update gess 3/25/98
|
|
* @param aToken -- next (start) token to be handled
|
|
* @return PR_TRUE if all went well; PR_FALSE if error occured
|
|
*/
|
|
nsresult CNavDTD::HandleCommentToken(CToken* aToken) {
|
|
NS_PRECONDITION(0!=aToken,kNullToken);
|
|
return NS_OK;
|
|
}
|
|
|
|
/**
|
|
* This method gets called when a skippedcontent token has
|
|
* been encountered in the parse process. After verifying
|
|
* that the topmost container can contain text, we call
|
|
* AddLeaf to store this token in the top container.
|
|
*
|
|
* @update gess 3/25/98
|
|
* @param aToken -- next (start) token to be handled
|
|
* @return PR_TRUE if all went well; PR_FALSE if error occured
|
|
*/
|
|
nsresult CNavDTD::HandleSkippedContentToken(CToken* aToken) {
|
|
NS_PRECONDITION(0!=aToken,kNullToken);
|
|
|
|
nsresult result=NS_OK;
|
|
|
|
if(HasOpenContainer(eHTMLTag_body)) {
|
|
nsCParserNode aNode((CHTMLToken*)aToken,mLineNumber);
|
|
result=AddLeaf(aNode);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method gets called when an attribute token has been
|
|
* encountered in the parse process. This is an error, since
|
|
* all attributes should have been accounted for in the prior
|
|
* start or end tokens
|
|
*
|
|
* @update gess 3/25/98
|
|
* @param aToken -- next (start) token to be handled
|
|
* @return PR_TRUE if all went well; PR_FALSE if error occured
|
|
*/
|
|
nsresult CNavDTD::HandleAttributeToken(CToken* aToken) {
|
|
NS_PRECONDITION(0!=aToken,kNullToken);
|
|
NS_ERROR("attribute encountered -- this shouldn't happen!");
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
/**
|
|
* This method gets called when a script token has been
|
|
* encountered in the parse process.
|
|
*
|
|
* @update gess 3/25/98
|
|
* @param aToken -- next (start) token to be handled
|
|
* @return PR_TRUE if all went well; PR_FALSE if error occured
|
|
*/
|
|
nsresult CNavDTD::HandleScriptToken(nsCParserNode& aNode) {
|
|
nsresult result=NS_OK;
|
|
|
|
PRInt32 pos=GetTopmostIndexOf(eHTMLTag_body);
|
|
PRInt32 attrCount=aNode.GetAttributeCount(PR_TRUE);
|
|
|
|
if (kNotFound == pos) {
|
|
// We're in the HEAD, but don't bother to open it.
|
|
if(NS_OK==result) {
|
|
CollectSkippedContent(aNode,attrCount);
|
|
result=AddLeaf(aNode);
|
|
}//if
|
|
}//if
|
|
else {
|
|
// We're in the BODY
|
|
CollectSkippedContent(aNode,attrCount);
|
|
result=AddLeaf(aNode);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method gets called when a style token has been
|
|
* encountered in the parse process.
|
|
*
|
|
* @update gess 3/25/98
|
|
* @param aToken -- next (start) token to be handled
|
|
* @return PR_TRUE if all went well; PR_FALSE if error occured
|
|
*/
|
|
nsresult CNavDTD::HandleStyleToken(CToken* aToken){
|
|
NS_PRECONDITION(0!=aToken,kNullToken);
|
|
|
|
// CStyleToken* st = (CStyleToken*)(aToken);
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
/**
|
|
* This method gets called when an "instruction" token has been
|
|
* encountered in the parse process.
|
|
*
|
|
* @update gess 3/25/98
|
|
* @param aToken -- next (start) token to be handled
|
|
* @return PR_TRUE if all went well; PR_FALSE if error occured
|
|
*/
|
|
nsresult CNavDTD::HandleProcessingInstructionToken(CToken* aToken){
|
|
NS_PRECONDITION(0!=aToken,kNullToken);
|
|
|
|
// CStyleToken* st = (CStyleToken*)(aToken);
|
|
return NS_OK;
|
|
}
|
|
|
|
/**
|
|
* Retrieve the attributes for this node, and add then into
|
|
* the node.
|
|
*
|
|
* @update gess4/22/98
|
|
* @param aNode is the node you want to collect attributes for
|
|
* @param aCount is the # of attributes you're expecting
|
|
* @return error code (should be 0)
|
|
*/
|
|
PRInt32 CNavDTD::CollectAttributes(nsCParserNode& aNode,PRInt32 aCount){
|
|
int attr=0;
|
|
for(attr=0;attr<aCount;attr++){
|
|
CToken* theToken=mParser->PeekToken();
|
|
if(theToken) {
|
|
eHTMLTokenTypes theType=eHTMLTokenTypes(theToken->GetTokenType());
|
|
if(eToken_attribute==theType){
|
|
mParser->PopToken(); //pop it for real...
|
|
aNode.AddAttribute(theToken);
|
|
}
|
|
}
|
|
else return kInterrupted;
|
|
}
|
|
return kNoError;
|
|
}
|
|
|
|
|
|
/**
|
|
* Causes the next skipped-content token (if any) to
|
|
* be consumed by this node.
|
|
* @update gess5/11/98
|
|
* @param node to consume skipped-content
|
|
* @param holds the number of skipped content elements encountered
|
|
* @return Error condition.
|
|
*/
|
|
PRInt32 CNavDTD::CollectSkippedContent(nsCParserNode& aNode,PRInt32& aCount) {
|
|
PRInt32 result=kNoError;
|
|
eHTMLTokenTypes theType;
|
|
CToken* theToken;
|
|
aCount=0;
|
|
do{
|
|
theToken=mParser->PeekToken();
|
|
if(theToken) {
|
|
theType=eHTMLTokenTypes(theToken->GetTokenType());
|
|
if(eToken_skippedcontent==theType) {
|
|
mParser->PopToken();
|
|
aNode.SetSkippedContent(theToken);
|
|
aCount++;
|
|
}
|
|
}
|
|
} while(theToken && (eToken_skippedcontent==theType));
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Finds a tag handler for the given tag type, given in string.
|
|
*
|
|
* @update gess 4/2/98
|
|
* @param aString contains name of tag to be handled
|
|
* @return valid tag handler (if found) or null
|
|
*/
|
|
void CNavDTD::DeleteTokenHandlers(void) {
|
|
for(int i=eToken_unknown;i<eToken_last;i++){
|
|
delete mTokenHandlers[i];
|
|
mTokenHandlers[i]=0;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Finds a tag handler for the given tag type.
|
|
*
|
|
* @update gess 4/2/98
|
|
* @param aTagType type of tag to be handled
|
|
* @return valid tag handler (if found) or null
|
|
*/
|
|
CITokenHandler* CNavDTD::GetTokenHandler(eHTMLTokenTypes aType) const {
|
|
CITokenHandler* result=0;
|
|
if((aType>0) && (aType<eToken_last)) {
|
|
result=mTokenHandlers[aType];
|
|
}
|
|
else {
|
|
}
|
|
return result;
|
|
}
|
|
|
|
|
|
/**
|
|
* Register a handler.
|
|
*
|
|
* @update gess 4/2/98
|
|
* @param
|
|
* @return
|
|
*/
|
|
CITokenHandler* CNavDTD::AddTokenHandler(CITokenHandler* aHandler) {
|
|
NS_ASSERTION(0!=aHandler,"Error: Null handler");
|
|
|
|
if(aHandler) {
|
|
eHTMLTokenTypes type=(eHTMLTokenTypes)aHandler->GetTokenType();
|
|
if(type<eToken_last) {
|
|
mTokenHandlers[type]=aHandler;
|
|
}
|
|
else {
|
|
//add code here to handle dynamic tokens...
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* The parser calls this method after it's selected
|
|
* an constructed a DTD.
|
|
*
|
|
* @update gess 3/25/98
|
|
* @param aParser is a ptr to the controlling parser.
|
|
* @return nada
|
|
*/
|
|
void CNavDTD::SetParser(nsIParser* aParser) {
|
|
mParser=(nsParser*)aParser;
|
|
if(aParser)
|
|
mParseMode=aParser->GetParseMode();
|
|
// mParseMode=eParseMode_noquirks;
|
|
}
|
|
|
|
|
|
/**
|
|
* This method gets called in order to set the content
|
|
* sink for this parser to dump nodes to.
|
|
*
|
|
* @update gess 3/25/98
|
|
* @param nsIContentSink interface for node receiver
|
|
* @return
|
|
*/
|
|
nsIContentSink* CNavDTD::SetContentSink(nsIContentSink* aSink) {
|
|
nsIContentSink* old=mSink;
|
|
mSink=(nsIHTMLContentSink*)aSink;
|
|
return old;
|
|
}
|
|
|
|
|
|
/**
|
|
* This method is called to determine whether or not a tag
|
|
* can contain an explict style tag (font, italic, bold, etc.)
|
|
* Most can -- but some, like option, cannot. Therefore we
|
|
* don't bother to open transient styles within these elements.
|
|
*
|
|
* @update gess 4/8/98
|
|
* @param aParent -- tag enum of parent container
|
|
* @param aChild -- tag enum of child container
|
|
* @return PR_TRUE if parent can contain child
|
|
*/
|
|
PRBool CNavDTD::CanContainStyles(eHTMLTags aParent) const {
|
|
PRBool result=PR_TRUE;
|
|
switch(aParent) {
|
|
case eHTMLTag_option:
|
|
result=PR_FALSE; break;
|
|
default:
|
|
break;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
|
|
/***********************************************************************************
|
|
The following tables determine the set of elements each tag can contain...
|
|
***********************************************************************************/
|
|
|
|
static eHTMLTags gTagSet1[]={
|
|
eHTMLTag_a, eHTMLTag_acronym, eHTMLTag_address, eHTMLTag_applet,
|
|
eHTMLTag_blink, eHTMLTag_b, eHTMLTag_basefont, eHTMLTag_bdo,
|
|
eHTMLTag_big,
|
|
eHTMLTag_blockquote,eHTMLTag_br, eHTMLTag_button, eHTMLTag_center,
|
|
eHTMLTag_cite, eHTMLTag_code, eHTMLTag_dfn, eHTMLTag_dir,
|
|
eHTMLTag_div, eHTMLTag_dl, eHTMLTag_dt,
|
|
eHTMLTag_em, eHTMLTag_embed,
|
|
eHTMLTag_fieldset, eHTMLTag_font, eHTMLTag_form,
|
|
eHTMLTag_h1, eHTMLTag_h2, eHTMLTag_h3,
|
|
eHTMLTag_h4, eHTMLTag_h5, eHTMLTag_h6,
|
|
eHTMLTag_hr, eHTMLTag_i, eHTMLTag_iframe, eHTMLTag_img,
|
|
eHTMLTag_input, eHTMLTag_isindex,
|
|
|
|
eHTMLTag_kbd, eHTMLTag_label, eHTMLTag_layer, eHTMLTag_li,
|
|
eHTMLTag_map, eHTMLTag_menu, eHTMLTag_newline, eHTMLTag_nobr,
|
|
eHTMLTag_noframes, eHTMLTag_noscript,
|
|
eHTMLTag_object, eHTMLTag_ol, eHTMLTag_p, eHTMLTag_pre,
|
|
eHTMLTag_q, eHTMLTag_s, eHTMLTag_strike,
|
|
eHTMLTag_samp, eHTMLTag_script, eHTMLTag_select, eHTMLTag_small,
|
|
eHTMLTag_spacer, eHTMLTag_span, eHTMLTag_strong,
|
|
eHTMLTag_sub, eHTMLTag_sup, eHTMLTag_table, eHTMLTag_text,
|
|
|
|
eHTMLTag_textarea, eHTMLTag_tt, eHTMLTag_u, eHTMLTag_ul,
|
|
eHTMLTag_userdefined, eHTMLTag_var, eHTMLTag_wbr,
|
|
eHTMLTag_whitespace};
|
|
|
|
static eHTMLTags gTagSet2[]={
|
|
eHTMLTag_a, eHTMLTag_acronym, eHTMLTag_applet, eHTMLTag_blink,
|
|
eHTMLTag_b,
|
|
eHTMLTag_basefont, eHTMLTag_bdo, eHTMLTag_big, eHTMLTag_br,
|
|
eHTMLTag_button, eHTMLTag_cite, eHTMLTag_code, eHTMLTag_dfn,
|
|
eHTMLTag_div, eHTMLTag_em, eHTMLTag_font, eHTMLTag_hr,
|
|
eHTMLTag_embed,
|
|
eHTMLTag_i, eHTMLTag_iframe, eHTMLTag_img, eHTMLTag_input,
|
|
eHTMLTag_kbd,
|
|
|
|
eHTMLTag_label, eHTMLTag_layer, eHTMLTag_map, eHTMLTag_newline,
|
|
eHTMLTag_nobr, eHTMLTag_object, eHTMLTag_p,
|
|
eHTMLTag_q, eHTMLTag_s, eHTMLTag_strike,
|
|
eHTMLTag_samp, eHTMLTag_script, eHTMLTag_select, eHTMLTag_small,
|
|
eHTMLTag_spacer, eHTMLTag_span, eHTMLTag_strong,
|
|
eHTMLTag_sub, eHTMLTag_sup, eHTMLTag_text, eHTMLTag_textarea,
|
|
|
|
eHTMLTag_table,// XXX kipp was here
|
|
|
|
eHTMLTag_tt, eHTMLTag_u, eHTMLTag_userdefined, eHTMLTag_var,
|
|
eHTMLTag_wbr, eHTMLTag_whitespace};
|
|
|
|
static eHTMLTags gTagSet3[]={
|
|
eHTMLTag_a, eHTMLTag_acronym, eHTMLTag_applet, eHTMLTag_blink,
|
|
eHTMLTag_b,
|
|
eHTMLTag_bdo, eHTMLTag_big, eHTMLTag_br, eHTMLTag_blockquote,
|
|
eHTMLTag_body, eHTMLTag_caption, eHTMLTag_center, eHTMLTag_cite,
|
|
eHTMLTag_code, eHTMLTag_dd, eHTMLTag_del, eHTMLTag_dfn,
|
|
eHTMLTag_div, eHTMLTag_dt, eHTMLTag_em, eHTMLTag_fieldset,
|
|
eHTMLTag_embed,
|
|
eHTMLTag_font, eHTMLTag_form, eHTMLTag_h1, eHTMLTag_h2,
|
|
eHTMLTag_h3, eHTMLTag_h4, eHTMLTag_h5, eHTMLTag_h6,
|
|
eHTMLTag_i, eHTMLTag_iframe, eHTMLTag_ins, eHTMLTag_kbd,
|
|
|
|
eHTMLTag_label, eHTMLTag_legend, eHTMLTag_li, eHTMLTag_map,
|
|
|
|
eHTMLTag_newline, eHTMLTag_noframes,
|
|
eHTMLTag_noscript, eHTMLTag_object, eHTMLTag_p, eHTMLTag_pre,
|
|
eHTMLTag_q, eHTMLTag_s, eHTMLTag_strike,
|
|
eHTMLTag_samp, eHTMLTag_small, eHTMLTag_spacer,
|
|
eHTMLTag_span, eHTMLTag_strong, eHTMLTag_sub, eHTMLTag_sup,
|
|
eHTMLTag_td, eHTMLTag_text,
|
|
|
|
eHTMLTag_th, eHTMLTag_tt, eHTMLTag_u, eHTMLTag_userdefined,
|
|
eHTMLTag_var, eHTMLTag_wbr, eHTMLTag_whitespace};
|
|
|
|
/***********************************************************************************
|
|
The preceeding tables determine the set of elements each tag can contain...
|
|
***********************************************************************************/
|
|
|
|
|
|
/**
|
|
* This method quickly scans the given set of tags,
|
|
* looking for the given tag.
|
|
* @update gess8/27/98
|
|
* @param aTag -- tag to be search for in set
|
|
* @param aTagSet -- set of tags to be searched
|
|
* @return
|
|
*/
|
|
inline PRBool FindTagInSet(PRInt32 aTag,const eHTMLTags aTagSet[],PRInt32 aCount) {
|
|
PRInt32 index;
|
|
|
|
for(index=0;index<aCount;index++)
|
|
if(aTag==aTagSet[index]) {
|
|
return PR_TRUE;
|
|
}
|
|
return PR_FALSE;
|
|
}
|
|
|
|
/**
|
|
* This method is called to determine whether or not a tag
|
|
* of one type can contain a tag of another type.
|
|
*
|
|
* @update gess 4/8/98
|
|
* @param aParent -- tag enum of parent container
|
|
* @param aChild -- tag enum of child container
|
|
* @return PR_TRUE if parent can contain child
|
|
*/
|
|
PRBool CNavDTD::CanContain(PRInt32 aParent,PRInt32 aChild) const {
|
|
|
|
PRBool result=(eHTMLTag_userdefined==aChild) ? PR_TRUE : !IsContainer(aParent);
|
|
|
|
|
|
/***************************************************************************
|
|
* Handle form elements here. Why? Because as long as a form is open,
|
|
* almost any form element is allowed. (Except <option> which must have a
|
|
* <select> as a parent.) Handling forms here means I don't have to do
|
|
* special case form handling in every case statement below.
|
|
*
|
|
* Note: ANYONE can contain a form element so long as a form is open.
|
|
***************************************************************************/
|
|
if(FindTagInSet(aChild,gFormElementTags,sizeof(gFormElementTags)/sizeof(eHTMLTag_unknown))) {
|
|
if(HasOpenContainer(eHTMLTag_form)) {
|
|
switch((eHTMLTags)aParent) {
|
|
case eHTMLTag_select:
|
|
result=PRBool(eHTMLTag_option==aChild);
|
|
break;
|
|
case eHTMLTag_option:
|
|
result=PR_FALSE;
|
|
break;
|
|
default:
|
|
result=PR_TRUE;
|
|
break;
|
|
} //switch
|
|
}//if
|
|
return result;
|
|
}
|
|
|
|
if((aParent) && (FindTagInSet(aParent,gStyleTags,sizeof(gStyleTags)/sizeof(eHTMLTag_unknown)))) {
|
|
if(eHTMLTag_li == aChild) {
|
|
//This code was added to enforce the rule that listitems
|
|
//autoclose prior listitems. Stylistic tags (including <A>)
|
|
//that get in the way are simply out of luck.
|
|
result=PR_FALSE;
|
|
}
|
|
else
|
|
result=FindTagInSet(aChild,gTagSet1,sizeof(gTagSet1)/sizeof(eHTMLTag_unknown));
|
|
}
|
|
else {
|
|
switch((eHTMLTags)aParent) {
|
|
case eHTMLTag_address:
|
|
result=FindTagInSet(aChild,gTagSet2,sizeof(gTagSet2)/sizeof(eHTMLTag_unknown));
|
|
break;
|
|
|
|
case eHTMLTag_applet:
|
|
if(eHTMLTag_param==aChild)
|
|
result=PR_TRUE;
|
|
else
|
|
result=FindTagInSet(aChild,gTagSet2,sizeof(gTagSet2)/sizeof(eHTMLTag_unknown));
|
|
break;
|
|
|
|
case eHTMLTag_blockquote:
|
|
case eHTMLTag_body:
|
|
case eHTMLTag_layer:
|
|
if(eHTMLTag_userdefined==aChild)
|
|
result=PR_TRUE;
|
|
else
|
|
result=FindTagInSet(aChild,gTagSet1,sizeof(gTagSet1)/sizeof(eHTMLTag_unknown));
|
|
break;
|
|
|
|
case eHTMLTag_button:
|
|
result=FindTagInSet(aChild,gTagSet3,sizeof(gTagSet3)/sizeof(eHTMLTag_unknown));
|
|
break;
|
|
|
|
case eHTMLTag_caption: case eHTMLTag_center:
|
|
case eHTMLTag_dir:
|
|
case eHTMLTag_div: case eHTMLTag_form:
|
|
case eHTMLTag_label: case eHTMLTag_legend:
|
|
case eHTMLTag_menu: case eHTMLTag_noscript:
|
|
case eHTMLTag_ol: case eHTMLTag_ul:
|
|
case eHTMLTag_embed: case eHTMLTag_noembed:
|
|
result=FindTagInSet(aChild,gTagSet1,sizeof(gTagSet1)/sizeof(eHTMLTag_unknown));
|
|
break;
|
|
|
|
case eHTMLTag_dd:
|
|
result=(eHTMLTag_dt==aChild) ? PR_FALSE: FindTagInSet(aChild,gTagSet1,sizeof(gTagSet1)/sizeof(eHTMLTag_unknown));
|
|
break;
|
|
|
|
case eHTMLTag_colgroup:
|
|
result=PRBool(eHTMLTag_col==(eHTMLTags)aChild);
|
|
break;
|
|
|
|
case eHTMLTag_dt:
|
|
{
|
|
static eHTMLTags datalistTags[]={eHTMLTag_dt,eHTMLTag_dd};
|
|
|
|
if(FindTagInSet(aChild,datalistTags,sizeof(datalistTags)/sizeof(eHTMLTag_unknown))) {
|
|
result=PR_TRUE;
|
|
}
|
|
else
|
|
result=FindTagInSet(aChild,gTagSet1,sizeof(gTagSet1)/sizeof(eHTMLTag_unknown));
|
|
}
|
|
break;
|
|
|
|
case eHTMLTag_dl:
|
|
{
|
|
static eHTMLTags okTags[]={eHTMLTag_dd,eHTMLTag_dt,eHTMLTag_whitespace,
|
|
eHTMLTag_map,eHTMLTag_form,eHTMLTag_newline,eHTMLTag_p};
|
|
result=FindTagInSet(aChild,okTags,sizeof(okTags)/sizeof(eHTMLTag_unknown));
|
|
}
|
|
break;
|
|
|
|
case eHTMLTag_fieldset:
|
|
if(eHTMLTag_legend==aChild)
|
|
result=PR_TRUE;
|
|
else
|
|
result=FindTagInSet(aChild,gTagSet1,sizeof(gTagSet1)/sizeof(eHTMLTag_unknown));
|
|
break;
|
|
|
|
case eHTMLTag_frameset:
|
|
{
|
|
static eHTMLTags okTags[]={ eHTMLTag_frame, eHTMLTag_frameset, eHTMLTag_noframes,
|
|
eHTMLTag_newline, eHTMLTag_whitespace};
|
|
result=FindTagInSet(aChild,okTags,sizeof(okTags)/sizeof(eHTMLTag_unknown));
|
|
}
|
|
break;
|
|
|
|
case eHTMLTag_h1: case eHTMLTag_h2:
|
|
case eHTMLTag_h3: case eHTMLTag_h4:
|
|
case eHTMLTag_h5: case eHTMLTag_h6:
|
|
{
|
|
if(FindTagInSet(aChild,gHeadingTags,sizeof(gHeadingTags)/sizeof(eHTMLTag_unknown)))
|
|
result=PR_FALSE;
|
|
else result=FindTagInSet(aChild,gTagSet1,sizeof(gTagSet1)/sizeof(eHTMLTag_unknown));
|
|
}
|
|
break;
|
|
|
|
case eHTMLTag_head:
|
|
{
|
|
static eHTMLTags okTags[]={
|
|
eHTMLTag_base, eHTMLTag_isindex, eHTMLTag_link, eHTMLTag_meta,
|
|
eHTMLTag_script, eHTMLTag_style, eHTMLTag_title};
|
|
result=FindTagInSet(aChild,okTags,sizeof(okTags)/sizeof(eHTMLTag_unknown));
|
|
}
|
|
break;
|
|
|
|
case eHTMLTag_html:
|
|
{
|
|
static eHTMLTags okTags[]={eHTMLTag_body,eHTMLTag_frameset,eHTMLTag_head,eHTMLTag_script};
|
|
result=FindTagInSet(aChild,okTags,sizeof(okTags)/sizeof(eHTMLTag_unknown));
|
|
}
|
|
break;
|
|
|
|
case eHTMLTag_iframe:/* XXX wrong */
|
|
if(eHTMLTag_frame==aChild)
|
|
result=PR_FALSE;
|
|
else
|
|
result=FindTagInSet(aChild,gTagSet1,sizeof(gTagSet1)/sizeof(eHTMLTag_unknown));
|
|
break;
|
|
|
|
case eHTMLTag_li:
|
|
if (eHTMLTag_li == aChild) {
|
|
result = PR_FALSE;
|
|
}
|
|
else result=!FindTagInSet(aChild,gHeadingTags,sizeof(gHeadingTags)/sizeof(eHTMLTag_unknown));
|
|
break;
|
|
|
|
case eHTMLTag_map:
|
|
{
|
|
static eHTMLTags okTags[] = { eHTMLTag_area,eHTMLTag_newline,eHTMLTag_whitespace};
|
|
result=FindTagInSet(aChild,okTags,sizeof(okTags)/sizeof(eHTMLTag_unknown));
|
|
}
|
|
break;
|
|
|
|
case eHTMLTag_noframes:
|
|
if(eHTMLTag_body==aChild)
|
|
result=PR_TRUE;
|
|
else
|
|
result=FindTagInSet(aChild,gTagSet1,sizeof(gTagSet1)/sizeof(eHTMLTag_unknown));
|
|
break;
|
|
|
|
case eHTMLTag_option:
|
|
//for now, allow an option to contain anything but another option...
|
|
result=PRBool(eHTMLTag_option!=aChild);
|
|
break;
|
|
|
|
case eHTMLTag_p:
|
|
{
|
|
static eHTMLTags datalistTags[]={eHTMLTag_dt,eHTMLTag_dd};
|
|
|
|
if(eHTMLTag_p==aChild)
|
|
result=PR_FALSE;
|
|
else if(FindTagInSet(aChild,datalistTags,sizeof(datalistTags)/sizeof(eHTMLTag_unknown))) {
|
|
//we now allow DT/DD inside a paragraph, so long as a DL is open...
|
|
if(PR_TRUE==HasOpenContainer(eHTMLTag_dl)) {
|
|
if(PR_TRUE==HasOpenContainer(eHTMLTag_dt))
|
|
result=PR_FALSE;
|
|
} else
|
|
result=PR_TRUE;
|
|
}
|
|
else
|
|
result=FindTagInSet(aChild,gTagSet2,sizeof(gTagSet2)/sizeof(eHTMLTag_unknown));
|
|
}
|
|
break;
|
|
|
|
case eHTMLTag_object:
|
|
case eHTMLTag_pre:
|
|
result=FindTagInSet(aChild,gTagSet2,sizeof(gTagSet2)/sizeof(eHTMLTag_unknown));
|
|
break;
|
|
|
|
case eHTMLTag_table:
|
|
{
|
|
static eHTMLTags okTags[]={
|
|
eHTMLTag_caption, eHTMLTag_col, eHTMLTag_colgroup,eHTMLTag_tbody,
|
|
eHTMLTag_tfoot, /* eHTMLTag_tr,*/ eHTMLTag_thead, eHTMLTag_map};
|
|
result=FindTagInSet(aChild,okTags,sizeof(okTags)/sizeof(eHTMLTag_unknown));
|
|
}
|
|
break;
|
|
|
|
case eHTMLTag_tbody:
|
|
case eHTMLTag_tfoot:
|
|
case eHTMLTag_thead:
|
|
{
|
|
static eHTMLTags okTags[]={eHTMLTag_tr,eHTMLTag_map,eHTMLTag_form};
|
|
result=FindTagInSet(aChild,okTags,sizeof(okTags)/sizeof(eHTMLTag_unknown));
|
|
}
|
|
break;
|
|
|
|
case eHTMLTag_th:
|
|
case eHTMLTag_td:
|
|
{
|
|
static eHTMLTags okTags[]={eHTMLTag_newline,eHTMLTag_map};
|
|
result=FindTagInSet(aChild,okTags,sizeof(okTags)/sizeof(eHTMLTag_unknown));
|
|
if(PR_FALSE==result)
|
|
result=FindTagInSet(aChild,gTagSet1,sizeof(gTagSet1)/sizeof(eHTMLTag_unknown));
|
|
}
|
|
break;
|
|
|
|
case eHTMLTag_tr:
|
|
{
|
|
static eHTMLTags okTags[]={eHTMLTag_td,eHTMLTag_th,eHTMLTag_form,eHTMLTag_map};
|
|
result=FindTagInSet(aChild,okTags,sizeof(okTags)/sizeof(eHTMLTag_unknown));
|
|
}
|
|
break;
|
|
|
|
case eHTMLTag_unknown:
|
|
//the only thing that should ever have an unknown
|
|
//parent is an HTML Tag. Everything else should propagate.
|
|
result=PRBool(eHTMLTag_html==aChild);
|
|
break;
|
|
|
|
case eHTMLTag_listing:
|
|
case eHTMLTag_select:
|
|
case eHTMLTag_userdefined:
|
|
result=PR_TRUE; //XXX for now...
|
|
break;
|
|
|
|
default:
|
|
#ifdef NS_DEBUG
|
|
printf("XXX: unhandled tag %s in CanContain switch statement\n",
|
|
NS_EnumToTag((nsHTMLTag)aParent));
|
|
#endif
|
|
break;
|
|
} //switch
|
|
} //if
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method is called to determine whether or not
|
|
* the necessary intermediate tags should be propagated
|
|
* between the given parent and given child.
|
|
*
|
|
* @update gess 4/8/98
|
|
* @param aParent -- tag enum of parent container
|
|
* @param aChild -- tag enum of child container
|
|
* @return PR_TRUE if propagation should occur
|
|
*/
|
|
PRBool CNavDTD::CanPropagate(eHTMLTags aParent,eHTMLTags aChild) const {
|
|
PRBool result=PR_TRUE;
|
|
|
|
switch(aParent) {
|
|
case eHTMLTag_td:
|
|
case eHTMLTag_th:
|
|
result=CanContain(aParent,aChild);
|
|
break;
|
|
|
|
default:
|
|
if(IsContainer(aChild) && HasOpenContainer(aChild))
|
|
result=IsGatedFromClosing(aChild);
|
|
break;
|
|
}//switch
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method is called to determine whether or not a tag
|
|
* of one type can contain a tag of another type.
|
|
*
|
|
* @update gess 4/8/98
|
|
* @param aParent -- tag enum of parent container
|
|
* @param aChild -- tag enum of child container
|
|
* @return PR_TRUE if parent can contain child
|
|
*/
|
|
PRBool CNavDTD::CanContainIndirect(eHTMLTags aParent,eHTMLTags aChild) const {
|
|
PRBool result=PR_FALSE;
|
|
|
|
switch(aParent) {
|
|
|
|
case eHTMLTag_html:
|
|
{
|
|
static eHTMLTags okTags[]={eHTMLTag_head,eHTMLTag_body };
|
|
result=FindTagInSet(aChild,okTags,sizeof(okTags)/sizeof(eHTMLTag_unknown));
|
|
}
|
|
|
|
case eHTMLTag_body:
|
|
result=PR_TRUE; break;
|
|
|
|
case eHTMLTag_table:
|
|
{
|
|
static eHTMLTags okTags[]={
|
|
eHTMLTag_caption, eHTMLTag_colgroup,
|
|
eHTMLTag_tbody, eHTMLTag_tfoot,
|
|
eHTMLTag_thead, eHTMLTag_tr,
|
|
eHTMLTag_td, eHTMLTag_th,
|
|
eHTMLTag_col};
|
|
result=FindTagInSet(aChild,okTags,sizeof(okTags)/sizeof(eHTMLTag_unknown));
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method gets called to determine whether a given
|
|
* tag can contain newlines. Most do not.
|
|
*
|
|
* @update gess 3/25/98
|
|
* @param aTag -- tag to test for containership
|
|
* @return PR_TRUE if given tag can contain other tags
|
|
*/
|
|
PRBool CNavDTD::CanOmit(eHTMLTags aParent,eHTMLTags aChild) const {
|
|
PRBool result=PR_FALSE;
|
|
|
|
//begin with some simple (and obvious) cases...
|
|
switch(aParent) {
|
|
case eHTMLTag_table:
|
|
if(eHTMLTag_form==aChild)
|
|
result=PR_FALSE;
|
|
else result=!FindTagInSet(aChild,gTableTags,sizeof(gTableTags)/sizeof(eHTMLTag_unknown));
|
|
break;
|
|
|
|
case eHTMLTag_tr:
|
|
switch(aChild) {
|
|
case eHTMLTag_td:
|
|
case eHTMLTag_th:
|
|
case eHTMLTag_form:
|
|
case eHTMLTag_tr:
|
|
result=PR_FALSE;
|
|
break;
|
|
default:
|
|
result=PR_TRUE;
|
|
}
|
|
break;
|
|
|
|
case eHTMLTag_unknown:
|
|
{
|
|
static eHTMLTags skippable[]={eHTMLTag_newline,eHTMLTag_whitespace};
|
|
if(FindTagInSet(aChild,skippable,sizeof(skippable)/sizeof(eHTMLTag_unknown))) {
|
|
result=PR_TRUE;
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
|
|
//ok, since no parent claimed it, test based on the child...
|
|
switch(aChild) {
|
|
|
|
case eHTMLTag_userdefined:
|
|
case eHTMLTag_comment:
|
|
result=PR_TRUE;
|
|
break;
|
|
|
|
case eHTMLTag_html:
|
|
case eHTMLTag_body:
|
|
result=HasOpenContainer(aChild); //don't bother if they're already open...
|
|
break;
|
|
|
|
case eHTMLTag_button: case eHTMLTag_fieldset:
|
|
case eHTMLTag_input: case eHTMLTag_isindex:
|
|
case eHTMLTag_label: case eHTMLTag_legend:
|
|
case eHTMLTag_select: case eHTMLTag_textarea:
|
|
case eHTMLTag_option:
|
|
if(PR_FALSE==HasOpenContainer(eHTMLTag_form))
|
|
result=PR_TRUE;
|
|
break;
|
|
|
|
case eHTMLTag_newline:
|
|
case eHTMLTag_whitespace:
|
|
|
|
switch(aParent) {
|
|
case eHTMLTag_html: case eHTMLTag_head:
|
|
case eHTMLTag_title: case eHTMLTag_map:
|
|
case eHTMLTag_tr: case eHTMLTag_table:
|
|
case eHTMLTag_thead: case eHTMLTag_tfoot:
|
|
case eHTMLTag_tbody: case eHTMLTag_col:
|
|
case eHTMLTag_colgroup: case eHTMLTag_unknown:
|
|
result=PR_TRUE;
|
|
default:
|
|
break;
|
|
} //switch
|
|
break;
|
|
|
|
//this code prevents table container elements from
|
|
//opening unless a table is actually already opened.
|
|
case eHTMLTag_tr: case eHTMLTag_thead:
|
|
case eHTMLTag_tfoot: case eHTMLTag_tbody:
|
|
case eHTMLTag_td: case eHTMLTag_th:
|
|
case eHTMLTag_caption:
|
|
if(PR_FALSE==HasOpenContainer(eHTMLTag_table))
|
|
result=PR_TRUE;
|
|
break;
|
|
|
|
case eHTMLTag_entity:
|
|
switch(aParent) {
|
|
case eHTMLTag_tr: case eHTMLTag_table:
|
|
case eHTMLTag_thead: case eHTMLTag_tfoot:
|
|
case eHTMLTag_tbody:
|
|
result=PR_TRUE;
|
|
default:
|
|
break;
|
|
} //switch
|
|
break;
|
|
|
|
case eHTMLTag_frame:
|
|
if(eHTMLTag_iframe==aParent)
|
|
result=PR_TRUE;
|
|
break;
|
|
|
|
default:
|
|
|
|
static eHTMLTags kNonStylizedTabletags[]={eHTMLTag_table,eHTMLTag_tr};
|
|
if(FindTagInSet(aChild,gStyleTags,sizeof(gStyleTags)/sizeof(eHTMLTag_unknown))) {
|
|
if(FindTagInSet(aParent,kNonStylizedTabletags,sizeof(kNonStylizedTabletags)/sizeof(eHTMLTag_unknown)))
|
|
return PR_TRUE;
|
|
}
|
|
break;
|
|
} //switch
|
|
break;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
|
|
/**
|
|
* This method is called when you want to determine if one tag is
|
|
* synonymous with another. Cases where this are true include style
|
|
* tags (where <i> is allowed to close <b> for example). Another
|
|
* is <H?>, where any open heading tag can be closed by any close heading tag.
|
|
* @update gess6/16/98
|
|
* @param
|
|
* @return
|
|
*/
|
|
PRBool IsCompatibleTag(eHTMLTags aTag1,eHTMLTags aTag2) {
|
|
PRBool result=PR_FALSE;
|
|
|
|
if(FindTagInSet(aTag1,gStyleTags,sizeof(gStyleTags)/sizeof(eHTMLTag_unknown))) {
|
|
result=FindTagInSet(aTag2,gStyleTags,sizeof(gStyleTags)/sizeof(eHTMLTag_unknown));
|
|
}
|
|
if(FindTagInSet(aTag1,gHeadingTags,sizeof(gHeadingTags)/sizeof(eHTMLTag_unknown))) {
|
|
result=FindTagInSet(aTag2,gHeadingTags,sizeof(gHeadingTags)/sizeof(eHTMLTag_unknown));
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method gets called to determine whether a given
|
|
* ENDtag can be omitted. Admittedly,this is a gross simplification.
|
|
*
|
|
* @update gess 3/25/98
|
|
* @param aTag -- tag to test for containership
|
|
* @return PR_TRUE if given tag can contain other tags
|
|
*/
|
|
PRBool CNavDTD::CanOmitEndTag(eHTMLTags aParent,eHTMLTags aChild) const {
|
|
PRBool result=PR_FALSE;
|
|
|
|
//begin with some simple (and obvious) cases...
|
|
switch((eHTMLTags)aChild) {
|
|
|
|
case eHTMLTag_userdefined:
|
|
case eHTMLTag_comment:
|
|
result=PR_TRUE;
|
|
break;
|
|
|
|
case eHTMLTag_a:
|
|
result=!HasOpenContainer(aChild);
|
|
break;
|
|
|
|
case eHTMLTag_html:
|
|
case eHTMLTag_body:
|
|
result=HasOpenContainer(aChild); //don't bother if they're already open...
|
|
break;
|
|
|
|
case eHTMLTag_newline:
|
|
case eHTMLTag_whitespace:
|
|
|
|
switch(aParent) {
|
|
case eHTMLTag_html: case eHTMLTag_head:
|
|
case eHTMLTag_title: case eHTMLTag_map:
|
|
case eHTMLTag_tr: case eHTMLTag_table:
|
|
case eHTMLTag_thead: case eHTMLTag_tfoot:
|
|
case eHTMLTag_tbody: case eHTMLTag_col:
|
|
case eHTMLTag_colgroup: case eHTMLTag_unknown:
|
|
result=PR_TRUE;
|
|
default:
|
|
break;
|
|
} //switch
|
|
break;
|
|
|
|
//It turns out that a <Hn> can be closed by any other <H?>
|
|
//This code makes them all seem compatible.
|
|
case eHTMLTag_h1: case eHTMLTag_h2:
|
|
case eHTMLTag_h3: case eHTMLTag_h4:
|
|
case eHTMLTag_h5: case eHTMLTag_h6:
|
|
if(FindTagInSet(aParent,gHeadingTags,sizeof(gHeadingTags)/sizeof(eHTMLTag_unknown))) {
|
|
result=PR_FALSE;
|
|
break;
|
|
}
|
|
//Otherwise, IT's OK TO FALL THROUGH HERE...
|
|
|
|
|
|
default:
|
|
if(IsGatedFromClosing(aChild))
|
|
result=PR_TRUE;
|
|
else if(IsCompatibleTag(aChild,mBodyContext->mElements.Last()))
|
|
result=PR_FALSE;
|
|
else result=(!HasOpenContainer(aChild));
|
|
break;
|
|
} //switch
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method gets called to determine whether a given
|
|
* tag is itself a container
|
|
*
|
|
* @update gess 4/8/98
|
|
* @param aTag -- tag to test as a container
|
|
* @return PR_TRUE if given tag can contain other tags
|
|
*/
|
|
PRBool CNavDTD::IsContainer(PRInt32 aTag) const {
|
|
PRBool result=!FindTagInSet(aTag,gNonContainers,sizeof(gNonContainers)/sizeof(eHTMLTag_unknown));
|
|
return result;
|
|
}
|
|
|
|
|
|
/**
|
|
* This method does two things: 1st, help construct
|
|
* our own internal model of the content-stack; and
|
|
* 2nd, pass this message on to the sink.
|
|
* @update gess4/6/98
|
|
* @param aNode -- next node to be added to model
|
|
* @return TRUE if ok, FALSE if error
|
|
*/
|
|
eHTMLTags CNavDTD::GetDefaultParentTagFor(eHTMLTags aChildTag) const{
|
|
eHTMLTags result=eHTMLTag_unknown;
|
|
switch(aChildTag) {
|
|
|
|
case eHTMLTag_text:
|
|
result=eHTMLTag_p; break;
|
|
|
|
case eHTMLTag_html:
|
|
result=eHTMLTag_unknown; break;
|
|
|
|
case eHTMLTag_body:
|
|
case eHTMLTag_head:
|
|
case eHTMLTag_frameset:
|
|
result=eHTMLTag_html; break;
|
|
|
|
//These tags are head specific...
|
|
case eHTMLTag_style:
|
|
case eHTMLTag_meta:
|
|
case eHTMLTag_title:
|
|
case eHTMLTag_base:
|
|
case eHTMLTag_link:
|
|
result=eHTMLTag_head; break;
|
|
|
|
//These tags are table specific...
|
|
case eHTMLTag_caption:
|
|
case eHTMLTag_colgroup:
|
|
case eHTMLTag_tbody:
|
|
case eHTMLTag_tfoot:
|
|
case eHTMLTag_thead:
|
|
result=eHTMLTag_table; break;
|
|
|
|
case eHTMLTag_tr:
|
|
result=eHTMLTag_tbody; break;
|
|
|
|
case eHTMLTag_td:
|
|
case eHTMLTag_th:
|
|
result=eHTMLTag_tr; break;
|
|
|
|
case eHTMLTag_col:
|
|
result=eHTMLTag_colgroup; break;
|
|
|
|
case eHTMLTag_dd:
|
|
case eHTMLTag_dt:
|
|
result=eHTMLTag_dl; break;
|
|
|
|
case eHTMLTag_textarea:
|
|
case eHTMLTag_select:
|
|
result=eHTMLTag_form; break;
|
|
|
|
case eHTMLTag_option:
|
|
result=eHTMLTag_select; break;
|
|
|
|
//These have to do with image maps...
|
|
case eHTMLTag_area:
|
|
result=eHTMLTag_map; break;
|
|
|
|
//These have to do with applets...
|
|
case eHTMLTag_param:
|
|
result=eHTMLTag_applet; break;
|
|
|
|
//These have to do with frames...
|
|
case eHTMLTag_frame:
|
|
result=eHTMLTag_frameset; break;
|
|
|
|
default:
|
|
result=eHTMLTag_body; //XXX Hack! Just for now.
|
|
break;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
|
|
/**
|
|
* This method tries to design a context vector (without actually
|
|
* changing our parser state) from the parent down to the
|
|
* child.
|
|
*
|
|
* @update gess4/6/98
|
|
* @param aVector is the string where we store our output vector
|
|
* in bottom-up order.
|
|
* @param aParent -- tag type of parent
|
|
* @param aChild -- tag type of child
|
|
* @return TRUE if propagation closes; false otherwise
|
|
*/
|
|
PRBool CNavDTD::ForwardPropagate(nsTagStack& aStack,eHTMLTags aParentTag,eHTMLTags aChildTag) {
|
|
PRBool result=PR_FALSE;
|
|
|
|
switch(aParentTag) {
|
|
case eHTMLTag_table:
|
|
{
|
|
static eHTMLTags tableTags[]={eHTMLTag_tr,eHTMLTag_td};
|
|
if(FindTagInSet(aChildTag,tableTags,sizeof(tableTags)/sizeof(eHTMLTag_unknown))) {
|
|
return BackwardPropagate(aStack,aParentTag,aChildTag);
|
|
}
|
|
}
|
|
//otherwise, intentionally fall through...
|
|
|
|
case eHTMLTag_tr:
|
|
if(PR_TRUE==CanContain((PRInt32)eHTMLTag_td,(PRInt32)aChildTag)) {
|
|
aStack.Push(eHTMLTag_td);
|
|
result=BackwardPropagate(aStack,aParentTag,eHTMLTag_td);
|
|
// result=PR_TRUE;
|
|
}
|
|
|
|
break;
|
|
|
|
case eHTMLTag_th:
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}//switch
|
|
return result;
|
|
}
|
|
|
|
|
|
/**
|
|
* This method tries to design a context map (without actually
|
|
* changing our parser state) from the child up to the parent.
|
|
*
|
|
* @update gess4/6/98
|
|
* @param aVector is the string where we store our output vector
|
|
* in bottom-up order.
|
|
* @param aParent -- tag type of parent
|
|
* @param aChild -- tag type of child
|
|
* @return TRUE if propagation closes; false otherwise
|
|
*/
|
|
PRBool CNavDTD::BackwardPropagate(nsTagStack& aStack,eHTMLTags aParentTag,eHTMLTags aChildTag) const {
|
|
|
|
eHTMLTags theParentTag=aChildTag;
|
|
|
|
do {
|
|
theParentTag=(eHTMLTags)GetDefaultParentTagFor(theParentTag);
|
|
if(theParentTag!=eHTMLTag_unknown) {
|
|
aStack.Push(theParentTag);
|
|
}
|
|
if(CanContain(aParentTag,theParentTag)) {
|
|
//we've found a complete sequence, so push the parent...
|
|
theParentTag=aParentTag;
|
|
aStack.Push(theParentTag);
|
|
}
|
|
} while((theParentTag!=eHTMLTag_unknown) && (theParentTag!=aParentTag));
|
|
|
|
return PRBool(aParentTag==theParentTag);
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* This method allows the caller to determine if a form
|
|
* element is currently open.
|
|
*
|
|
* @update gess 4/2/98
|
|
* @param
|
|
* @return
|
|
*/
|
|
PRBool CNavDTD::HasOpenContainer(eHTMLTags aContainer) const {
|
|
PRBool result=PR_FALSE;
|
|
|
|
switch(aContainer) {
|
|
case eHTMLTag_form:
|
|
result=mHasOpenForm; break;
|
|
|
|
default:
|
|
result=(kNotFound!=GetTopmostIndexOf(aContainer)); break;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Call this method when you want to determine whether a
|
|
* given tag should be prevented (gated) from closing.
|
|
*
|
|
* @update gess 7/15/96
|
|
* @param aTag the tag to be tested for autoclosure
|
|
* @return TRUE if tag is gated.
|
|
*/
|
|
PRBool CNavDTD::IsGatedFromClosing(eHTMLTags aChildTag) const {
|
|
PRBool result=PR_FALSE;
|
|
PRInt32 tagPos=GetTopmostIndexOf(aChildTag);
|
|
PRInt32 theGatePos=kNotFound;
|
|
|
|
if(FindTagInSet(aChildTag,gStyleTags,sizeof(gStyleTags)/sizeof(eHTMLTag_unknown))) {
|
|
static eHTMLTags theGateTags[]={
|
|
eHTMLTag_caption, eHTMLTag_col, eHTMLTag_colgroup, eHTMLTag_tbody,
|
|
eHTMLTag_tfoot, eHTMLTag_tr, eHTMLTag_thead, eHTMLTag_td,
|
|
eHTMLTag_body};
|
|
theGatePos=GetTopmostIndexOf(theGateTags,sizeof(theGateTags)/sizeof(eHTMLTag_unknown));
|
|
}
|
|
else {
|
|
switch(aChildTag) {
|
|
case eHTMLTag_li:
|
|
{
|
|
static eHTMLTags theGateTags[]={eHTMLTag_ol,eHTMLTag_ul};
|
|
theGatePos=GetTopmostIndexOf(theGateTags,sizeof(theGateTags)/sizeof(eHTMLTag_unknown));
|
|
}
|
|
break;
|
|
|
|
case eHTMLTag_td:
|
|
case eHTMLTag_tr:
|
|
{
|
|
/***************************************************************************
|
|
* This code may seem confusing, so let me explain it.
|
|
* We're trying to handle the case where a child tag may be prevented from
|
|
* closing a tag already on the stack. Here's a case:
|
|
*
|
|
* <table>
|
|
* <tr>
|
|
* <td>
|
|
* <table>
|
|
* </tr>
|
|
*
|
|
* In this case, the bottom </tr> is "gated" from closing the bottommost
|
|
* table.
|
|
*
|
|
* HOW THIS CODE WORKS:
|
|
*
|
|
* This block of code compares all the members of the default parent
|
|
* hierarchy for the childtag against the open containers on our stack.
|
|
* If they ever match, then the given child should be gated.
|
|
***************************************************************************/
|
|
|
|
int theIndex;
|
|
int theTopIndex=mBodyContext->mElements.mCount-1;
|
|
|
|
eHTMLTags theParent=GetDefaultParentTagFor(aChildTag);
|
|
while(eHTMLTag_unknown!=theParent) {
|
|
for(theIndex=theTopIndex;theIndex>tagPos;theIndex--){
|
|
if(mBodyContext->mElements.mTags[theIndex]==theParent){
|
|
theGatePos=theIndex;
|
|
break;
|
|
}
|
|
}
|
|
theParent=GetDefaultParentTagFor(theParent);
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
if(kNotFound!=theGatePos)
|
|
if(kNotFound!=tagPos)
|
|
result=PRBool(theGatePos>tagPos);
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method retrieves the HTMLTag type of the topmost
|
|
* container on the stack.
|
|
*
|
|
* @update gess 4/2/98
|
|
* @return tag id of topmost node in contextstack
|
|
*/
|
|
eHTMLTags CNavDTD::GetTopNode() const {
|
|
return mBodyContext->mElements.Last();
|
|
}
|
|
|
|
/**
|
|
* Determine whether the given tag is open anywhere
|
|
* in our context stack.
|
|
*
|
|
* @update gess 4/2/98
|
|
* @param eHTMLTags tag to be searched for in stack
|
|
* @return topmost index of tag on stack
|
|
*/
|
|
PRInt32 CNavDTD::GetTopmostIndexOf(eHTMLTags aTagSet[],PRInt32 aCount) const {
|
|
int i=0;
|
|
for(i=mBodyContext->mElements.mCount-1;i>=0;i--){
|
|
if(FindTagInSet(mBodyContext->mElements.mTags[i],aTagSet,aCount)) {
|
|
return i;
|
|
}
|
|
}
|
|
return kNotFound;
|
|
}
|
|
|
|
/**
|
|
* Determine whether the given tag is open anywhere
|
|
* in our context stack.
|
|
*
|
|
* @update gess 4/2/98
|
|
* @param eHTMLTags tag to be searched for in stack
|
|
* @return topmost index of tag on stack
|
|
*/
|
|
PRInt32 CNavDTD::GetTopmostIndexOf(eHTMLTags aTag) const {
|
|
int i=0;
|
|
for(i=mBodyContext->mElements.mCount-1;i>=0;i--){
|
|
if(mBodyContext->mElements.mTags[i]==aTag)
|
|
return i;
|
|
}
|
|
return kNotFound;
|
|
}
|
|
|
|
/*********************************************
|
|
Here comes code that handles the interface
|
|
to our content sink.
|
|
*********************************************/
|
|
|
|
|
|
/**
|
|
* It is with great trepidation that I offer this method (privately of course).
|
|
* The gets called whenever a container gets opened. This methods job is to
|
|
* take a look at the (transient) style stack, and open any style containers that
|
|
* are there. Of course, we shouldn't bother to open styles that are incompatible
|
|
* with our parent container.
|
|
*
|
|
* @update gess6/4/98
|
|
* @param tag of the container just opened
|
|
* @return 0 (for now)
|
|
*/
|
|
nsresult CNavDTD::OpenTransientStyles(eHTMLTags aTag){
|
|
nsresult result=NS_OK;
|
|
|
|
if(!FindTagInSet(aTag,gWhitespaceTags,sizeof(gWhitespaceTags)/sizeof(eHTMLTag_unknown))) {
|
|
PRInt32 pos=0;
|
|
|
|
eHTMLTags parentTag=mBodyContext->mElements.Last();
|
|
if(CanContainStyles(parentTag)) {
|
|
for(pos=0;pos<mBodyContext->mStyles->mCount;pos++) {
|
|
eHTMLTags theTag=mBodyContext->mStyles->mTags[pos];
|
|
if(PR_FALSE==HasOpenContainer(theTag)) {
|
|
|
|
CStartToken token(theTag);
|
|
nsCParserNode theNode(&token,mLineNumber);
|
|
|
|
switch(theTag) {
|
|
case eHTMLTag_secret_h1style: case eHTMLTag_secret_h2style:
|
|
case eHTMLTag_secret_h3style: case eHTMLTag_secret_h4style:
|
|
case eHTMLTag_secret_h5style: case eHTMLTag_secret_h6style:
|
|
break;
|
|
default:
|
|
token.SetTypeID(theTag); //open the html container...
|
|
result=OpenContainer(theNode,PR_FALSE);
|
|
mBodyContext->mElements.mBits[mBodyContext->mElements.mCount-1]=PR_TRUE;
|
|
} //switch
|
|
}
|
|
if(NS_OK!=result)
|
|
break;
|
|
}//for
|
|
}
|
|
}//if
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* It is with great trepidation that I offer this method (privately of course).
|
|
* The gets called just prior when a container gets opened. This methods job is to
|
|
* take a look at the (transient) style stack, and <i>close</i> any style containers
|
|
* that are there. Of course, we shouldn't bother to open styles that are incompatible
|
|
* with our parent container.
|
|
* SEE THE TOP OF THIS FILE for more information about how the transient style stack works.
|
|
*
|
|
* @update gess6/4/98
|
|
* @param tag of the container just opened
|
|
* @return 0 (for now)
|
|
*/
|
|
nsresult CNavDTD::CloseTransientStyles(eHTMLTags aTag){
|
|
nsresult result=NS_OK;
|
|
|
|
if((mBodyContext->mStyles->mCount>0) && (mBodyContext->mElements.mBits[mBodyContext->mElements.mCount-1])) {
|
|
if(!FindTagInSet(aTag,gWhitespaceTags,sizeof(gWhitespaceTags)/sizeof(eHTMLTag_unknown))) {
|
|
result=CloseContainersTo(mBodyContext->mStyles->mTags[0],PR_FALSE);
|
|
mBodyContext->mElements.mBits[mBodyContext->mElements.mCount-1]=PR_FALSE;
|
|
|
|
}//if
|
|
}//if
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method does two things: 1st, help construct
|
|
* our own internal model of the content-stack; and
|
|
* 2nd, pass this message on to the sink.
|
|
*
|
|
* @update gess4/22/98
|
|
* @param aNode -- next node to be added to model
|
|
*/
|
|
nsresult CNavDTD::OpenHTML(const nsIParserNode& aNode){
|
|
NS_PRECONDITION(mBodyContext->mElements.mCount >= 0, kInvalidTagStackPos);
|
|
|
|
nsresult result=mSink->OpenHTML(aNode);
|
|
mBodyContext->mElements.Push((eHTMLTags)aNode.GetNodeType());
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method does two things: 1st, help construct
|
|
* our own internal model of the content-stack; and
|
|
* 2nd, pass this message on to the sink.
|
|
*
|
|
* @update gess4/6/98
|
|
* @param aNode -- next node to be removed from our model
|
|
* @return TRUE if ok, FALSE if error
|
|
*/
|
|
nsresult CNavDTD::CloseHTML(const nsIParserNode& aNode){
|
|
NS_PRECONDITION(mBodyContext->mElements.mCount > 0, kInvalidTagStackPos);
|
|
nsresult result=mSink->CloseHTML(aNode);
|
|
mBodyContext->mElements.Pop();
|
|
return result;
|
|
}
|
|
|
|
|
|
/**
|
|
* This method does two things: 1st, help construct
|
|
* our own internal model of the content-stack; and
|
|
* 2nd, pass this message on to the sink.
|
|
* @update gess4/6/98
|
|
* @param aNode -- next node to be added to model
|
|
* @return TRUE if ok, FALSE if error
|
|
*/
|
|
nsresult CNavDTD::OpenHead(const nsIParserNode& aNode){
|
|
mBodyContext->mElements.Push(eHTMLTag_head);
|
|
nsresult result=mSink->OpenHead(aNode);
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method does two things: 1st, help construct
|
|
* our own internal model of the content-stack; and
|
|
* 2nd, pass this message on to the sink.
|
|
* @update gess4/6/98
|
|
* @param aNode -- next node to be removed from our model
|
|
* @return TRUE if ok, FALSE if error
|
|
*/
|
|
nsresult CNavDTD::CloseHead(const nsIParserNode& aNode){
|
|
nsresult result=mSink->CloseHead(aNode);
|
|
mBodyContext->mElements.Pop();
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method does two things: 1st, help construct
|
|
* our own internal model of the content-stack; and
|
|
* 2nd, pass this message on to the sink.
|
|
* @update gess4/6/98
|
|
* @param aNode -- next node to be added to model
|
|
* @return TRUE if ok, FALSE if error
|
|
*/
|
|
nsresult CNavDTD::OpenBody(const nsIParserNode& aNode){
|
|
NS_PRECONDITION(mBodyContext->mElements.mCount >= 0, kInvalidTagStackPos);
|
|
|
|
nsresult result=NS_OK;
|
|
eHTMLTags topTag=mBodyContext->mElements.Last();
|
|
|
|
if(eHTMLTag_html!=topTag) {
|
|
|
|
//ok, there are two cases:
|
|
// 1. Nobody opened the html container
|
|
// 2. Someone left the head (or other) open
|
|
PRInt32 pos=GetTopmostIndexOf(eHTMLTag_html);
|
|
if(kNotFound!=pos) {
|
|
//if you're here, it means html is open,
|
|
//but some other tag(s) are in the way.
|
|
//So close other tag(s).
|
|
result=CloseContainersTo(pos+1,eHTMLTag_body,PR_TRUE);
|
|
} else {
|
|
//if you're here, it means that there is
|
|
//no HTML tag in document. Let's open it.
|
|
|
|
result=CloseContainersTo(0,eHTMLTag_html,PR_TRUE); //close current stack containers.
|
|
|
|
CHTMLToken token(gEmpty,eHTMLTag_html);
|
|
nsCParserNode htmlNode(&token,mLineNumber);
|
|
result=OpenHTML(htmlNode); //open the html container...
|
|
}
|
|
}
|
|
|
|
if(NS_OK==result) {
|
|
result=mSink->OpenBody(aNode);
|
|
mBodyContext->mElements.Push((eHTMLTags)aNode.GetNodeType());
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method does two things: 1st, help close
|
|
* our own internal model of the content-stack; and
|
|
* 2nd, pass this message on to the sink.
|
|
* @update gess4/6/98
|
|
* @param aNode -- next node to be removed from our model
|
|
* @return TRUE if ok, FALSE if error
|
|
*/
|
|
nsresult CNavDTD::CloseBody(const nsIParserNode& aNode){
|
|
NS_PRECONDITION(mBodyContext->mElements.mCount >= 0, kInvalidTagStackPos);
|
|
nsresult result=mSink->CloseBody(aNode);
|
|
mBodyContext->mElements.Pop();
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method does two things: 1st, help construct
|
|
* our own internal model of the content-stack; and
|
|
* 2nd, pass this message on to the sink.
|
|
* @update gess4/6/98
|
|
* @param aNode -- next node to be added to model
|
|
* @return TRUE if ok, FALSE if error
|
|
*/
|
|
nsresult CNavDTD::OpenForm(const nsIParserNode& aNode){
|
|
if(mHasOpenForm)
|
|
CloseForm(aNode);
|
|
nsresult result=mSink->OpenForm(aNode);
|
|
if(NS_OK==result)
|
|
mHasOpenForm=PR_TRUE;
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method does two things: 1st, help construct
|
|
* our own internal model of the content-stack; and
|
|
* 2nd, pass this message on to the sink.
|
|
* @update gess4/6/98
|
|
* @param aNode -- next node to be removed from our model
|
|
* @return TRUE if ok, FALSE if error
|
|
*/
|
|
nsresult CNavDTD::CloseForm(const nsIParserNode& aNode){
|
|
nsresult result=NS_OK;
|
|
if(mHasOpenForm) {
|
|
mHasOpenForm=PR_FALSE;
|
|
result=mSink->CloseForm(aNode);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method does two things: 1st, help construct
|
|
* our own internal model of the content-stack; and
|
|
* 2nd, pass this message on to the sink.
|
|
* @update gess4/6/98
|
|
* @param aNode -- next node to be added to model
|
|
* @return TRUE if ok, FALSE if error
|
|
*/
|
|
nsresult CNavDTD::OpenMap(const nsIParserNode& aNode){
|
|
if(mHasOpenMap)
|
|
CloseMap(aNode);
|
|
nsresult result=mSink->OpenMap(aNode);
|
|
if(NS_OK==result)
|
|
mHasOpenMap=PR_TRUE;
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method does two things: 1st, help construct
|
|
* our own internal model of the content-stack; and
|
|
* 2nd, pass this message on to the sink.
|
|
* @update gess4/6/98
|
|
* @param aNode -- next node to be removed from our model
|
|
* @return TRUE if ok, FALSE if error
|
|
*/
|
|
nsresult CNavDTD::CloseMap(const nsIParserNode& aNode){
|
|
nsresult result=NS_OK;
|
|
if(mHasOpenMap) {
|
|
mHasOpenMap=PR_FALSE;
|
|
result=mSink->CloseMap(aNode);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method does two things: 1st, help construct
|
|
* our own internal model of the content-stack; and
|
|
* 2nd, pass this message on to the sink.
|
|
* @update gess4/6/98
|
|
* @param aNode -- next node to be added to model
|
|
* @return TRUE if ok, FALSE if error
|
|
*/
|
|
nsresult CNavDTD::OpenFrameset(const nsIParserNode& aNode){
|
|
NS_PRECONDITION(mBodyContext->mElements.mCount >= 0, kInvalidTagStackPos);
|
|
nsresult result=mSink->OpenFrameset(aNode);
|
|
mBodyContext->mElements.Push((eHTMLTags)aNode.GetNodeType());
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method does two things: 1st, help construct
|
|
* our own internal model of the content-stack; and
|
|
* 2nd, pass this message on to the sink.
|
|
* @update gess4/6/98
|
|
* @param aNode -- next node to be removed from our model
|
|
* @return TRUE if ok, FALSE if error
|
|
*/
|
|
nsresult CNavDTD::CloseFrameset(const nsIParserNode& aNode){
|
|
NS_PRECONDITION(mBodyContext->mElements.mCount > 0, kInvalidTagStackPos);
|
|
nsresult result=mSink->CloseFrameset(aNode);
|
|
mBodyContext->mElements.Pop();
|
|
return result;
|
|
}
|
|
|
|
|
|
/**
|
|
* This method does two things: 1st, help construct
|
|
* our own internal model of the content-stack; and
|
|
* 2nd, pass this message on to the sink.
|
|
* @update gess4/6/98
|
|
* @param aNode -- next node to be added to model
|
|
* @return TRUE if ok, FALSE if error
|
|
*/
|
|
nsresult
|
|
CNavDTD::OpenContainer(const nsIParserNode& aNode,PRBool aUpdateStyleStack){
|
|
NS_PRECONDITION(mBodyContext->mElements.mCount >= 0, kInvalidTagStackPos);
|
|
|
|
nsresult result=NS_OK;
|
|
eHTMLTags nodeType=(eHTMLTags)aNode.GetNodeType();
|
|
|
|
switch(nodeType) {
|
|
|
|
case eHTMLTag_html:
|
|
result=OpenHTML(aNode); break;
|
|
|
|
case eHTMLTag_body:
|
|
result=OpenBody(aNode); break;
|
|
|
|
case eHTMLTag_style:
|
|
case eHTMLTag_head:
|
|
case eHTMLTag_title:
|
|
break;
|
|
|
|
case eHTMLTag_textarea:
|
|
{
|
|
PRInt32 theCount;
|
|
nsCParserNode& theCNode=*(nsCParserNode*)&aNode;
|
|
CollectSkippedContent(theCNode,theCount);
|
|
result=AddLeaf(theCNode);
|
|
}
|
|
break;
|
|
|
|
case eHTMLTag_map:
|
|
result=OpenMap(aNode);
|
|
break;
|
|
|
|
case eHTMLTag_form:
|
|
result=OpenForm(aNode); break;
|
|
|
|
case eHTMLTag_script:
|
|
{
|
|
nsCParserNode& theCNode=*(nsCParserNode*)&aNode;
|
|
result=HandleScriptToken(theCNode);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
result=mSink->OpenContainer(aNode);
|
|
mBodyContext->mElements.Push((eHTMLTags)aNode.GetNodeType());
|
|
break;
|
|
}
|
|
|
|
if((NS_OK==result) && (PR_TRUE==aUpdateStyleStack)){
|
|
UpdateStyleStackForOpenTag(nodeType,nodeType);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method does two things: 1st, help construct
|
|
* our own internal model of the content-stack; and
|
|
* 2nd, pass this message on to the sink.
|
|
* @update gess4/6/98
|
|
* @param aNode -- next node to be removed from our model
|
|
* @return TRUE if ok, FALSE if error
|
|
*/
|
|
nsresult
|
|
CNavDTD::CloseContainer(const nsIParserNode& aNode,eHTMLTags aTag,
|
|
PRBool aUpdateStyles){
|
|
NS_PRECONDITION(mBodyContext->mElements.mCount > 0, kInvalidTagStackPos);
|
|
nsresult result=NS_OK;
|
|
eHTMLTags nodeType=(eHTMLTags)aNode.GetNodeType();
|
|
|
|
//XXX Hack! We know this is wrong, but it works
|
|
//for the general case until we get it right.
|
|
switch(nodeType) {
|
|
|
|
case eHTMLTag_html:
|
|
result=CloseHTML(aNode); break;
|
|
|
|
case eHTMLTag_style:
|
|
case eHTMLTag_textarea:
|
|
break;
|
|
|
|
case eHTMLTag_head:
|
|
//result=CloseHead(aNode);
|
|
break;
|
|
|
|
case eHTMLTag_body:
|
|
result=CloseBody(aNode); break;
|
|
|
|
case eHTMLTag_map:
|
|
result=CloseMap(aNode);
|
|
break;
|
|
|
|
case eHTMLTag_form:
|
|
result=CloseForm(aNode); break;
|
|
|
|
case eHTMLTag_title:
|
|
default:
|
|
result=mSink->CloseContainer(aNode);
|
|
mBodyContext->mElements.Pop();
|
|
break;
|
|
}
|
|
|
|
mBodyContext->mElements.mBits[mBodyContext->mElements.mCount]=PR_FALSE;
|
|
if((NS_OK==result) && (PR_TRUE==aUpdateStyles)){
|
|
UpdateStyleStackForCloseTag(nodeType,aTag);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method does two things: 1st, help construct
|
|
* our own internal model of the content-stack; and
|
|
* 2nd, pass this message on to the sink.
|
|
* @update gess4/6/98
|
|
* @param
|
|
* @return TRUE if ok, FALSE if error
|
|
*/
|
|
nsresult
|
|
CNavDTD::CloseContainersTo(PRInt32 anIndex,eHTMLTags aTag,
|
|
PRBool aUpdateStyles){
|
|
NS_PRECONDITION(mBodyContext->mElements.mCount > 0, kInvalidTagStackPos);
|
|
nsresult result=NS_OK;
|
|
|
|
static CEndToken aToken(gEmpty);
|
|
nsCParserNode theNode(&aToken,mLineNumber);
|
|
|
|
if((anIndex<mBodyContext->mElements.mCount) && (anIndex>=0)) {
|
|
while(mBodyContext->mElements.mCount>anIndex) {
|
|
eHTMLTags theTag=mBodyContext->mElements.Last();
|
|
aToken.SetTypeID(theTag);
|
|
result=CloseContainer(theNode,aTag,aUpdateStyles);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method does two things: 1st, help construct
|
|
* our own internal model of the content-stack; and
|
|
* 2nd, pass this message on to the sink.
|
|
* @update gess4/6/98
|
|
* @param
|
|
* @return TRUE if ok, FALSE if error
|
|
*/
|
|
nsresult CNavDTD::CloseContainersTo(eHTMLTags aTag,PRBool aUpdateStyles){
|
|
NS_PRECONDITION(mBodyContext->mElements.mCount > 0, kInvalidTagStackPos);
|
|
|
|
PRInt32 pos=GetTopmostIndexOf(aTag);
|
|
|
|
if(kNotFound!=pos) {
|
|
//the tag is indeed open, so close it.
|
|
return CloseContainersTo(pos,aTag,aUpdateStyles);
|
|
}
|
|
|
|
eHTMLTags theTopTag=mBodyContext->mElements.Last();
|
|
if(IsCompatibleTag(aTag,theTopTag)) {
|
|
//if you're here, it's because we're trying to close one style tag,
|
|
//but a different one is actually open. Because this is NAV4x
|
|
//compatibililty mode, we must close the one that's really open.
|
|
aTag=theTopTag;
|
|
pos=GetTopmostIndexOf(aTag);
|
|
if(kNotFound!=pos) {
|
|
//the tag is indeed open, so close it.
|
|
return CloseContainersTo(pos,aTag,aUpdateStyles);
|
|
}
|
|
}
|
|
|
|
nsresult result=NS_OK;
|
|
eHTMLTags theParentTag=GetDefaultParentTagFor(aTag);
|
|
pos=GetTopmostIndexOf(theParentTag);
|
|
if(kNotFound!=pos) {
|
|
//the parent container is open, so close it instead
|
|
result=CloseContainersTo(pos+1,aTag,aUpdateStyles);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method causes the topmost container on the stack
|
|
* to be closed.
|
|
* @update gess4/6/98
|
|
* @see CloseContainer()
|
|
* @param
|
|
* @return TRUE if ok, FALSE if error
|
|
*/
|
|
nsresult CNavDTD::CloseTopmostContainer(){
|
|
NS_PRECONDITION(mBodyContext->mElements.mCount > 0, kInvalidTagStackPos);
|
|
|
|
CEndToken aToken(gEmpty);
|
|
eHTMLTags theTag=mBodyContext->mElements.Last();
|
|
aToken.SetTypeID(theTag);
|
|
nsCParserNode theNode(&aToken,mLineNumber);
|
|
return CloseContainer(theNode,theTag,PR_TRUE);
|
|
}
|
|
|
|
/**
|
|
* This method does two things: 1st, help construct
|
|
* our own internal model of the content-stack; and
|
|
* 2nd, pass this message on to the sink.
|
|
* @update gess4/6/98
|
|
* @param aNode -- next node to be added to model
|
|
* @return error code; 0 means OK
|
|
*/
|
|
nsresult CNavDTD::AddLeaf(const nsIParserNode& aNode){
|
|
nsresult result=mSink->AddLeaf(aNode);
|
|
return result;
|
|
}
|
|
|
|
static nsTagStack kPropagationStack;
|
|
|
|
/**
|
|
* This method gets called to create a valid context stack
|
|
* for the given child. We compare the current stack to the
|
|
* default needs of the child, and push new guys onto the
|
|
* stack until the child can be properly placed.
|
|
*
|
|
* @update gess 4/8/98
|
|
* @param aChildTag is the child for whom we need to
|
|
* create a new context vector
|
|
* @return true if we succeeded, otherwise false
|
|
*/
|
|
nsresult CNavDTD::CreateContextStackFor(eHTMLTags aChildTag){
|
|
|
|
kPropagationStack.Empty();
|
|
|
|
nsresult result=(nsresult)kContextMismatch;
|
|
PRInt32 cnt=0;
|
|
eHTMLTags theTop=mBodyContext->mElements.Last();
|
|
PRBool bResult=ForwardPropagate(kPropagationStack,theTop,aChildTag);
|
|
|
|
if(PR_FALSE==bResult){
|
|
|
|
if(eHTMLTag_unknown!=theTop) {
|
|
if(theTop!=aChildTag) //dont even bother if we're already inside a similar element...
|
|
bResult=BackwardPropagate(kPropagationStack,theTop,aChildTag);
|
|
|
|
/*****************************************************************************
|
|
OH NOOOO!...
|
|
|
|
We found a pretty fundamental flaw in the backward propagation code.
|
|
The previous version propagated from a child to a target parent, and
|
|
then again from the target parent to the root.
|
|
Only thing is, that won't work in cases where a container exists that's
|
|
not in the usual hiearchy:
|
|
|
|
<html><body>
|
|
<div>
|
|
<table>
|
|
<!--missing TR>
|
|
<td>cell text</td>
|
|
</tr>
|
|
</table> ...etc...
|
|
|
|
In this case, we'd propagate fine from the <TD> to the <TABLE>, and
|
|
then from the table to the <html>. Unfortunately, the <DIV> won't show
|
|
up in the propagated form, and then we get out of sync with the actual
|
|
context stack when it comes to autogenerate containers.
|
|
******************************************************************************/
|
|
|
|
} //if
|
|
else bResult=BackwardPropagate(kPropagationStack,eHTMLTag_html,aChildTag);
|
|
} //elseif
|
|
|
|
if((0==mBodyContext->mElements.mCount) || (mBodyContext->mElements.Last()==kPropagationStack.Pop()))
|
|
result=NS_OK;
|
|
|
|
//now, build up the stack according to the tags
|
|
//you have that aren't in the stack...
|
|
static CStartToken theToken(gEmpty);
|
|
if(PR_TRUE==bResult){
|
|
while(kPropagationStack.mCount>0) {
|
|
eHTMLTags theTag=kPropagationStack.Pop();
|
|
theToken.SetTypeID(theTag); //open the container...
|
|
HandleStartToken(&theToken);
|
|
}
|
|
result=NS_OK;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
|
|
/**
|
|
* This method gets called to ensure that the context
|
|
* stack is properly set up for the given child.
|
|
* We pop containers off the stack (all the way down
|
|
* html) until we get a container that can contain
|
|
* the given child.
|
|
*
|
|
* @update gess 4/8/98
|
|
* @param
|
|
* @return
|
|
*/
|
|
nsresult CNavDTD::ReduceContextStackFor(eHTMLTags aChildTag){
|
|
nsresult result=NS_OK;
|
|
eHTMLTags topTag=mBodyContext->mElements.Last();
|
|
|
|
while( (topTag!=kNotFound) &&
|
|
(PR_FALSE==CanContain(topTag,aChildTag)) &&
|
|
(PR_FALSE==CanContainIndirect(topTag,aChildTag))) {
|
|
CloseTopmostContainer();
|
|
topTag=mBodyContext->mElements.Last();
|
|
}
|
|
return result;
|
|
}
|
|
|
|
|
|
/**
|
|
* This method causes all explicit style-tag containers that
|
|
* are opened to be reflected on our internal style-stack.
|
|
*
|
|
* @update gess6/4/98
|
|
* @param aTag is the id of the html container being opened
|
|
* @return 0 if all is well.
|
|
*/
|
|
nsresult
|
|
CNavDTD::UpdateStyleStackForOpenTag(eHTMLTags aTag,eHTMLTags anActualTag){
|
|
nsresult result=0;
|
|
|
|
if(FindTagInSet(aTag,gStyleTags,sizeof(gStyleTags)/sizeof(eHTMLTag_unknown))) {
|
|
mBodyContext->mStyles->Push(aTag);
|
|
}
|
|
else {
|
|
switch (aTag) {
|
|
case eHTMLTag_h1: case eHTMLTag_h2:
|
|
case eHTMLTag_h3: case eHTMLTag_h4:
|
|
case eHTMLTag_h5: case eHTMLTag_h6:
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
return result;
|
|
} //update...
|
|
|
|
|
|
/**
|
|
* This method gets called when an explicit style close-tag is encountered.
|
|
* It results in the style tag id being popped from our internal style stack.
|
|
*
|
|
* @update gess6/4/98
|
|
* @param
|
|
* @return 0 if all went well (which it always does)
|
|
*/
|
|
nsresult
|
|
CNavDTD::UpdateStyleStackForCloseTag(eHTMLTags aTag,eHTMLTags anActualTag){
|
|
nsresult result=0;
|
|
|
|
if(mBodyContext->mStyles->mCount>0) {
|
|
if(FindTagInSet(aTag,gStyleTags,sizeof(gStyleTags)/sizeof(eHTMLTag_unknown))) {
|
|
if(aTag==anActualTag)
|
|
mBodyContext->mStyles->Pop();
|
|
}
|
|
else {
|
|
switch (aTag) {
|
|
case eHTMLTag_h1: case eHTMLTag_h2:
|
|
case eHTMLTag_h3: case eHTMLTag_h4:
|
|
case eHTMLTag_h5: case eHTMLTag_h6:
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}//switch
|
|
}
|
|
}//if
|
|
return result;
|
|
}
|
|
|
|
|
|
/*******************************************************************
|
|
These methods used to be hidden in the tokenizer-delegate.
|
|
That file merged with the DTD, since the separation wasn't really
|
|
buying us anything.
|
|
*******************************************************************/
|
|
|
|
/**
|
|
* This method is called just after a "<" has been consumed
|
|
* and we know we're at the start of some kind of tagged
|
|
* element. We don't know yet if it's a tag or a comment.
|
|
*
|
|
* @update gess 5/12/98
|
|
* @param aChar is the last char read
|
|
* @param aScanner is represents our input source
|
|
* @param aToken is the out arg holding our new token
|
|
* @return error code (may return kInterrupted).
|
|
*/
|
|
nsresult
|
|
CNavDTD::ConsumeTag(PRUnichar aChar,CScanner& aScanner,CToken*& aToken) {
|
|
|
|
nsresult result=aScanner.GetChar(aChar);
|
|
|
|
if(NS_OK==result) {
|
|
|
|
switch(aChar) {
|
|
case kForwardSlash:
|
|
PRUnichar ch;
|
|
result=aScanner.Peek(ch);
|
|
if(NS_OK==result) {
|
|
if(nsString::IsAlpha(ch))
|
|
aToken=gTokenRecycler.CreateTokenOfType(eToken_end,eHTMLTag_unknown,gEmpty);
|
|
else aToken=gTokenRecycler.CreateTokenOfType(eToken_comment,eHTMLTag_unknown,gEmpty);
|
|
}//if
|
|
break;
|
|
|
|
case kExclamation:
|
|
aToken=gTokenRecycler.CreateTokenOfType(eToken_comment,eHTMLTag_comment,gEmpty);
|
|
break;
|
|
|
|
case kQuestionMark: //it must be an XML processing instruction...
|
|
aToken=gTokenRecycler.CreateTokenOfType(eToken_instruction,eHTMLTag_unknown,gEmpty);
|
|
break;
|
|
|
|
default:
|
|
if(nsString::IsAlpha(aChar))
|
|
return ConsumeStartTag(aChar,aScanner,aToken);
|
|
else if(kEOF!=aChar) {
|
|
nsAutoString temp("<");
|
|
return ConsumeText(temp,aScanner,aToken);
|
|
}
|
|
} //switch
|
|
|
|
if((0!=aToken) && (NS_OK==result)) {
|
|
result= aToken->Consume(aChar,aScanner); //tell new token to finish consuming text...
|
|
if(result) {
|
|
delete aToken;
|
|
aToken=0;
|
|
}
|
|
} //if
|
|
} //if
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method is called just after we've consumed a start
|
|
* tag, and we now have to consume its attributes.
|
|
*
|
|
* @update gess 3/25/98
|
|
* @param aChar: last char read
|
|
* @param aScanner: see nsScanner.h
|
|
* @return
|
|
*/
|
|
nsresult
|
|
CNavDTD::ConsumeAttributes(PRUnichar aChar,CScanner& aScanner,CStartToken* aToken) {
|
|
PRBool done=PR_FALSE;
|
|
nsresult result=NS_OK;
|
|
PRInt16 theAttrCount=0;
|
|
|
|
while((!done) && (result==NS_OK)) {
|
|
CAttributeToken* theToken= (CAttributeToken*)gTokenRecycler.CreateTokenOfType(eToken_attribute,eHTMLTag_unknown,gEmpty);
|
|
if(theToken){
|
|
result=theToken->Consume(aChar,aScanner); //tell new token to finish consuming text...
|
|
|
|
//Much as I hate to do this, here's some special case code.
|
|
//This handles the case of empty-tags in XML. Our last
|
|
//attribute token will come through with a text value of ""
|
|
//and a textkey of "/". We should destroy it, and tell the
|
|
//start token it was empty.
|
|
nsString& key=theToken->GetKey();
|
|
nsString& text=theToken->GetStringValueXXX();
|
|
if((key[0]==kForwardSlash) && (0==text.Length())){
|
|
//tada! our special case! Treat it like an empty start tag...
|
|
aToken->SetEmpty(PR_TRUE);
|
|
delete theToken;
|
|
}
|
|
else if(NS_OK==result){
|
|
theAttrCount++;
|
|
mTokenDeque.Push(theToken);
|
|
}//if
|
|
else delete theToken; //we can't keep it...
|
|
}//if
|
|
|
|
if(NS_OK==result){
|
|
result=aScanner.Peek(aChar);
|
|
if(aChar==kGreaterThan) { //you just ate the '>'
|
|
aScanner.GetChar(aChar); //skip the '>'
|
|
done=PR_TRUE;
|
|
}//if
|
|
}//if
|
|
}//while
|
|
|
|
aToken->SetAttributeCount(theAttrCount);
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This is a special case method. It's job is to consume
|
|
* all of the given tag up to an including the end tag.
|
|
*
|
|
* @param aChar: last char read
|
|
* @param aScanner: see nsScanner.h
|
|
* @param anErrorCode: arg that will hold error condition
|
|
* @return new token or null
|
|
*/
|
|
nsresult
|
|
CNavDTD::ConsumeContentToEndTag(const nsString& aString,
|
|
PRUnichar aChar,
|
|
eHTMLTags aChildTag,
|
|
CScanner& aScanner,
|
|
CToken*& aToken){
|
|
|
|
//In the case that we just read the given tag, we should go and
|
|
//consume all the input until we find a matching end tag.
|
|
|
|
nsAutoString endTag("</");
|
|
endTag.Append(aString);
|
|
endTag.Append(">");
|
|
aToken=gTokenRecycler.CreateTokenOfType(eToken_skippedcontent,aChildTag,endTag);
|
|
return aToken->Consume(aChar,aScanner); //tell new token to finish consuming text...
|
|
}
|
|
|
|
/**
|
|
* This method is called just after a "<" has been consumed
|
|
* and we know we're at the start of a tag.
|
|
*
|
|
* @update gess 3/25/98
|
|
* @param aChar: last char read
|
|
* @param aScanner: see nsScanner.h
|
|
* @param anErrorCode: arg that will hold error condition
|
|
* @return new token or null
|
|
*/
|
|
|
|
static eHTMLTags gSkippedContentTags[]={ eHTMLTag_script, eHTMLTag_style, eHTMLTag_title, eHTMLTag_textarea};
|
|
|
|
nsresult
|
|
CNavDTD::ConsumeStartTag(PRUnichar aChar,CScanner& aScanner,CToken*& aToken) {
|
|
PRInt32 theDequeSize=mTokenDeque.GetSize();
|
|
nsresult result=NS_OK;
|
|
|
|
aToken=gTokenRecycler.CreateTokenOfType(eToken_start,eHTMLTag_unknown,gEmpty);
|
|
|
|
if(aToken) {
|
|
result= aToken->Consume(aChar,aScanner); //tell new token to finish consuming text...
|
|
if(NS_OK==result) {
|
|
if(((CStartToken*)aToken)->IsAttributed()) {
|
|
result=ConsumeAttributes(aChar,aScanner,(CStartToken*)aToken);
|
|
}
|
|
//now that that's over with, we have one more problem to solve.
|
|
//In the case that we just read a <SCRIPT> or <STYLE> tags, we should go and
|
|
//consume all the content itself.
|
|
if(NS_OK==result) {
|
|
|
|
eHTMLTags theTag=(eHTMLTags)aToken->GetTypeID();
|
|
|
|
if(FindTagInSet(theTag,gSkippedContentTags,sizeof(gSkippedContentTags)/sizeof(eHTMLTag_unknown))) {
|
|
|
|
//Do special case handling for <script>, <style>, <title> or <textarea>...
|
|
CToken* skippedToken=0;
|
|
nsString& str=aToken->GetStringValueXXX();
|
|
result=ConsumeContentToEndTag(str,aChar,theTag,aScanner,skippedToken);
|
|
|
|
if((NS_OK==result) && skippedToken){
|
|
//now we strip the ending sequence from our new SkippedContent token...
|
|
nsString& skippedText=((CSkippedContentToken*)skippedToken)->GetKey();
|
|
mTokenDeque.Push(skippedToken);
|
|
|
|
//In the case that we just read a given tag, we should go and
|
|
//consume all the tag content itself (and throw it all away).
|
|
|
|
CToken* endtoken=gTokenRecycler.CreateTokenOfType(eToken_end,theTag,skippedToken->GetStringValueXXX());
|
|
mTokenDeque.Push(endtoken);
|
|
} //if
|
|
} //if
|
|
} //if
|
|
|
|
//EEEEECCCCKKKK!!!
|
|
//This code is confusing, so pay attention.
|
|
//If you're here, it's because we were in the midst of consuming a start
|
|
//tag but ran out of data (not in the stream, but in this *part* of the stream.
|
|
//For simplicity, we have to unwind our input. Therefore, we pop and discard
|
|
//any new tokens we've cued this round. Later we can get smarter about this.
|
|
if(NS_OK!=result) {
|
|
while(mTokenDeque.GetSize()>theDequeSize) {
|
|
delete mTokenDeque.PopBack();
|
|
}
|
|
}
|
|
|
|
|
|
} //if
|
|
} //if
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method is called just after a "&" has been consumed
|
|
* and we know we're at the start of an entity.
|
|
*
|
|
* @update gess 3/25/98
|
|
* @param aChar: last char read
|
|
* @param aScanner: see nsScanner.h
|
|
* @param anErrorCode: arg that will hold error condition
|
|
* @return new token or null
|
|
*/
|
|
nsresult
|
|
CNavDTD::ConsumeEntity(PRUnichar aChar,CScanner& aScanner,CToken*& aToken) {
|
|
PRUnichar ch;
|
|
nsresult result=aScanner.GetChar(ch);
|
|
|
|
if(NS_OK==result) {
|
|
if(nsString::IsAlpha(ch)) { //handle common enity references &xxx; or �.
|
|
aToken = gTokenRecycler.CreateTokenOfType(eToken_entity,eHTMLTag_entity,gEmpty);
|
|
result = aToken->Consume(ch,aScanner); //tell new token to finish consuming text...
|
|
}
|
|
else if(kHashsign==ch) {
|
|
aToken = gTokenRecycler.CreateTokenOfType(eToken_entity,eHTMLTag_entity,gEmpty);
|
|
result=aToken->Consume(0,aScanner);
|
|
}
|
|
else {
|
|
//oops, we're actually looking at plain text...
|
|
nsAutoString temp("&");
|
|
temp.Append(ch);
|
|
result=ConsumeText(temp,aScanner,aToken);
|
|
}
|
|
}//if
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method is called just after whitespace has been
|
|
* consumed and we know we're at the start a whitespace run.
|
|
*
|
|
* @update gess 3/25/98
|
|
* @param aChar: last char read
|
|
* @param aScanner: see nsScanner.h
|
|
* @param anErrorCode: arg that will hold error condition
|
|
* @return new token or null
|
|
*/
|
|
nsresult
|
|
CNavDTD::ConsumeWhitespace(PRUnichar aChar,
|
|
CScanner& aScanner,
|
|
CToken*& aToken) {
|
|
aToken = gTokenRecycler.CreateTokenOfType(eToken_whitespace,eHTMLTag_whitespace,gEmpty);
|
|
nsresult result=kNoError;
|
|
if(aToken) {
|
|
result=aToken->Consume(aChar,aScanner);
|
|
}
|
|
return kNoError;
|
|
}
|
|
|
|
/**
|
|
* This method is called just after a "<!" has been consumed
|
|
* and we know we're at the start of a comment.
|
|
*
|
|
* @update gess 3/25/98
|
|
* @param aChar: last char read
|
|
* @param aScanner: see nsScanner.h
|
|
* @param anErrorCode: arg that will hold error condition
|
|
* @return new token or null
|
|
*/
|
|
nsresult CNavDTD::ConsumeComment(PRUnichar aChar,CScanner& aScanner,CToken*& aToken){
|
|
aToken = gTokenRecycler.CreateTokenOfType(eToken_comment,eHTMLTag_comment,gEmpty);
|
|
nsresult result=NS_OK;
|
|
if(aToken) {
|
|
result=aToken->Consume(aChar,aScanner);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method is called just after a known text char has
|
|
* been consumed and we should read a text run.
|
|
*
|
|
* @update gess 3/25/98
|
|
* @param aChar: last char read
|
|
* @param aScanner: see nsScanner.h
|
|
* @param anErrorCode: arg that will hold error condition
|
|
* @return new token or null
|
|
*/
|
|
nsresult CNavDTD::ConsumeText(const nsString& aString,CScanner& aScanner,CToken*& aToken){
|
|
nsresult result=NS_OK;
|
|
aToken=gTokenRecycler.CreateTokenOfType(eToken_text,eHTMLTag_text,aString);
|
|
if(aToken) {
|
|
PRUnichar ch=0;
|
|
result=aToken->Consume(ch,aScanner);
|
|
if(result) {
|
|
nsString& temp=aToken->GetStringValueXXX();
|
|
if(0==temp.Length()){
|
|
delete aToken;
|
|
}
|
|
else result=kNoError;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method is called just after a newline has been consumed.
|
|
*
|
|
* @update gess 3/25/98
|
|
* @param aChar: last char read
|
|
* @param aScanner: see nsScanner.h
|
|
* @param aToken is the newly created newline token that is parsing
|
|
* @return error code
|
|
*/
|
|
nsresult CNavDTD::ConsumeNewline(PRUnichar aChar,CScanner& aScanner,CToken*& aToken){
|
|
aToken=gTokenRecycler.CreateTokenOfType(eToken_newline,eHTMLTag_newline,gEmpty);
|
|
nsresult result=NS_OK;
|
|
if(aToken) {
|
|
result=aToken->Consume(aChar,aScanner);
|
|
}
|
|
return kNoError;
|
|
}
|
|
|
|
/**
|
|
* This method repeatedly called by the tokenizer.
|
|
* Each time, we determine the kind of token were about to
|
|
* read, and then we call the appropriate method to handle
|
|
* that token type.
|
|
*
|
|
* @update gess 3/25/98
|
|
* @param aChar: last char read
|
|
* @param aScanner: see nsScanner.h
|
|
* @param anErrorCode: arg that will hold error condition
|
|
* @return new token or null
|
|
*/
|
|
nsresult CNavDTD::ConsumeToken(CToken*& aToken){
|
|
aToken=0;
|
|
if(mTokenDeque.GetSize()>0) {
|
|
aToken=(CToken*)mTokenDeque.Pop();
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult result=NS_OK;
|
|
CScanner* theScanner=mParser->GetScanner();
|
|
if(NS_OK==result){
|
|
PRUnichar theChar;
|
|
result=theScanner->GetChar(theChar);
|
|
switch(result) {
|
|
case kEOF:
|
|
//We convert from eof to complete here, because we never really tried to get data.
|
|
//All we did was try to see if data was available, which it wasn't.
|
|
//It's important to return process complete, so that controlling logic can know that
|
|
//everything went well, but we're done with token processing.
|
|
result=kProcessComplete;
|
|
break;
|
|
|
|
case kInterrupted:
|
|
theScanner->RewindToMark();
|
|
break;
|
|
|
|
case NS_OK:
|
|
default:
|
|
switch(theChar) {
|
|
case kLessThan:
|
|
result=ConsumeTag(theChar,*theScanner,aToken);
|
|
break;
|
|
|
|
case kAmpersand:
|
|
result=ConsumeEntity(theChar,*theScanner,aToken);
|
|
break;
|
|
|
|
case kCR: case kLF:
|
|
result=ConsumeNewline(theChar,*theScanner,aToken);
|
|
break;
|
|
|
|
case kNotFound:
|
|
break;
|
|
|
|
default:
|
|
if(!nsString::IsSpace(theChar)) {
|
|
nsAutoString temp(theChar);
|
|
result=ConsumeText(temp,*theScanner,aToken);
|
|
break;
|
|
}
|
|
result=ConsumeWhitespace(theChar,*theScanner,aToken);
|
|
break;
|
|
} //switch
|
|
break;
|
|
} //switch
|
|
// if(NS_OK==result)
|
|
// result=theScanner->Eof();
|
|
} //if
|
|
return result;
|
|
}
|
|
|
|
|
|
/**
|
|
*
|
|
* @update gess5/18/98
|
|
* @param
|
|
* @return
|
|
*/
|
|
nsresult CNavDTD::WillResumeParse(void){
|
|
nsresult result = NS_OK;
|
|
if(mSink) {
|
|
result = mSink->WillResume();
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method gets called when the parsing process is interrupted
|
|
* due to lack of data (waiting for netlib).
|
|
* @update gess5/18/98
|
|
* @return error code
|
|
*/
|
|
nsresult CNavDTD::WillInterruptParse(void){
|
|
nsresult result = NS_OK;
|
|
if(mSink) {
|
|
result = mSink->WillInterrupt();
|
|
}
|
|
return result;
|
|
}
|
|
|
|
|