386 lines
9.7 KiB
C++
386 lines
9.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: NPL 1.1/GPL 2.0/LGPL 2.1
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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 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the NPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the NPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsParserNode.h"
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#include <string.h>
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#include "nsHTMLTokens.h"
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#include "nsITokenizer.h"
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#include "nsDTDUtils.h"
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static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);
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static NS_DEFINE_IID(kClassIID, NS_PARSER_NODE_IID);
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static NS_DEFINE_IID(kIParserNodeIID, NS_IPARSER_NODE_IID);
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static
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const nsString& GetEmptyString() {
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static nsString gEmptyStr;
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return gEmptyStr;
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}
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/**
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* Default Constructor
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*/
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nsCParserNode::nsCParserNode()
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: mToken(nsnull),
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mAttributes(nsnull),
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mUseCount(0),
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mGenericState(PR_FALSE),
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mTokenAllocator(nsnull)
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{
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MOZ_COUNT_CTOR(nsCParserNode);
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#ifdef HEAP_ALLOCATED_NODES
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mNodeAllocator=nsnull;
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#endif
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}
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/**
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* Constructor
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*
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* @update gess 3/25/98
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* @param aToken -- token to init internal token
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* @return
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*/
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nsCParserNode::nsCParserNode(CToken* aToken,
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nsTokenAllocator* aTokenAllocator,
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nsNodeAllocator* aNodeAllocator):
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nsIParserNode() {
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mRefCnt = 0;
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MOZ_COUNT_CTOR(nsCParserNode);
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static int theNodeCount=0;
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theNodeCount++;
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mAttributes=0;
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mToken=aToken;
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IF_HOLD(mToken);
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mTokenAllocator=aTokenAllocator;
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mUseCount=0;
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mGenericState=PR_FALSE;
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#ifdef HEAP_ALLOCATED_NODES
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mNodeAllocator=aNodeAllocator;
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#endif
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}
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/**
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* default destructor
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* NOTE: We intentionally DONT recycle mToken here.
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* It may get cached for use elsewhere
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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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nsCParserNode::~nsCParserNode() {
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MOZ_COUNT_DTOR(nsCParserNode);
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ReleaseAll();
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#ifdef HEAP_ALLOCATED_NODES
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if(mNodeAllocator) {
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mNodeAllocator->Recycle(this);
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}
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mNodeAllocator=nsnull;
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#endif
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mTokenAllocator=0;
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}
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/**
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* Init
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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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nsresult nsCParserNode::Init(CToken* aToken,
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nsTokenAllocator* aTokenAllocator,
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nsNodeAllocator* aNodeAllocator) {
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if(mAttributes && (mAttributes->GetSize())) {
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NS_ASSERTION(0!=mTokenAllocator, "Error: Attribute tokens on node without token allocator");
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if(mTokenAllocator) {
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CToken* theAttrToken=0;
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while((theAttrToken=NS_STATIC_CAST(CToken*,mAttributes->Pop()))) {
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IF_FREE(theAttrToken, mTokenAllocator);
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}
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}
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}
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mTokenAllocator=aTokenAllocator;
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mToken=aToken;
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IF_HOLD(mToken);
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mGenericState=PR_FALSE;
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mUseCount=0;
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#ifdef HEAP_ALLOCATED_NODES
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mNodeAllocator=aNodeAllocator;
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#endif
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return NS_OK;
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}
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/**
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* Causes the given attribute to be added to internal
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* mAttributes list, and mAttributeCount to be incremented.
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*
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* @update gess 3/25/98
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* @param aToken -- token to be added to attr list
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* @return
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*/
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void nsCParserNode::AddAttribute(CToken* aToken) {
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NS_PRECONDITION(0!=aToken, "Error: Token shouldn't be null!");
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NS_PRECONDITION(0!=mTokenAllocator, "Error: Can't add attribute without token allocator");
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if(mTokenAllocator) {
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if(!mAttributes)
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mAttributes=new nsDeque(0);
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if(mAttributes) {
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mAttributes->Push(aToken);
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}
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}
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}
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/**
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* Gets the name of this node. Currently unused.
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*
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* @update gess 3/25/98
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* @param
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* @return string ref containing node name
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*/
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const nsString& nsCParserNode::GetName() const {
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return GetEmptyString();
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// return mName;
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}
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/**
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* Get text value of this node, which translates into
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* getting the text value of the underlying token
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*
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* @update gess 3/25/98
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* @param
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* @return string ref of text from internal token
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*/
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const nsAString& nsCParserNode::GetText() const {
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return (mToken) ? mToken->GetStringValue() : NS_STATIC_CAST(const nsAString&,GetEmptyString());
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}
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/**
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* Get node type, meaning, get the tag type of the
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* underlying token
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*
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* @update gess 3/25/98
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* @param
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* @return int value that represents tag type
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*/
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PRInt32 nsCParserNode::GetNodeType(void) const{
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return (mToken) ? mToken->GetTypeID() : 0;
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}
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/**
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* Gets the token type, which corresponds to a value from
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* eHTMLTokens_xxx.
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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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PRInt32 nsCParserNode::GetTokenType(void) const{
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return (mToken) ? mToken->GetTokenType() : 0;
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}
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/**
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* Retrieve the number of attributes on this node
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*
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* @update gess 3/25/98
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* @param
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* @return int -- representing attribute count
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*/
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PRInt32 nsCParserNode::GetAttributeCount(PRBool askToken) const{
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PRInt32 result=0;
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if(PR_FALSE==askToken) {
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if(mAttributes)
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result=mAttributes->GetSize();
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}
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else result=mToken->GetAttributeCount();
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return result;
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}
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/**
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* Retrieve the string rep of the attribute key at the
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* given index.
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*
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* @update gess 3/25/98
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* @param anIndex-- offset of attribute to retrieve
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* @return string rep of given attribute text key
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*/
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const nsAString& nsCParserNode::GetKeyAt(PRUint32 anIndex) const {
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PRInt32 theCount = (mAttributes) ? mAttributes->GetSize() : 0;
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if((PRInt32)anIndex<theCount) {
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CAttributeToken* tkn=(CAttributeToken*)mAttributes->ObjectAt(anIndex);
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return tkn->GetKey();
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}
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return GetEmptyString();
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}
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/**
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* Retrieve the string rep of the attribute at given offset
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*
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* @update gess 3/25/98
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* @param anIndex-- offset of attribute to retrieve
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* @return string rep of given attribute text value
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*/
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const nsAString& nsCParserNode::GetValueAt(PRUint32 anIndex) const {
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PRInt32 theCount = (mAttributes) ? mAttributes->GetSize() : 0;
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NS_PRECONDITION(PRInt32(anIndex)<theCount, "Bad attr index");
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if(PRInt32(anIndex)<theCount) {
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CAttributeToken* tkn=(CAttributeToken*)mAttributes->ObjectAt(anIndex);
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return tkn->GetValue();
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}
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return GetEmptyString();
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}
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PRInt32 nsCParserNode::TranslateToUnicodeStr(nsString& aString) const
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{
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if (eToken_entity == mToken->GetTokenType()) {
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return ((CEntityToken*)mToken)->TranslateToUnicodeStr(aString);
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}
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return -1;
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}
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/**
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* This getter retrieves the line number from the input source where
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* the token occured. Lines are interpreted as occuring between \n characters.
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* @update gess7/24/98
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* @return int containing the line number the token was found on
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*/
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PRInt32 nsCParserNode::GetSourceLineNumber(void) const {
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return mToken ? mToken->GetLineNumber() : 0;
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}
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/**
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* This method pop the attribute token
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* @update harishd 03/25/99
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* @return token at anIndex
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*/
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CToken* nsCParserNode::PopAttributeToken() {
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CToken* result=0;
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if(mAttributes) {
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result =(CToken*)mAttributes->Pop();
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}
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return result;
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}
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/** Retrieve a string containing the tag and its attributes in "source" form
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* @update rickg 06June2000
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* @return void
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*/
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void nsCParserNode::GetSource(nsString& aString) {
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aString.Truncate();
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eHTMLTags theTag=(eHTMLTags)mToken->GetTypeID();
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aString.Append(PRUnichar('<'));
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const PRUnichar* theTagName=nsHTMLTags::GetStringValue(theTag);
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if(theTagName) {
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aString.Append(theTagName);
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}
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if(mAttributes) {
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int index=0;
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for(index=0;index<mAttributes->GetSize();index++) {
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CAttributeToken *theToken=(CAttributeToken*)mAttributes->ObjectAt(index);
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if(theToken) {
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theToken->AppendSourceTo(aString);
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aString.Append(PRUnichar(' ')); //this will get removed...
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}
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}
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}
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aString.Append(PRUnichar('>'));
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}
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/** Release all the objects you're holding to.
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* @update harishd 08/02/00
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* @return void
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*/
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nsresult nsCParserNode::ReleaseAll() {
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if(mAttributes) {
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NS_ASSERTION(0!=mTokenAllocator, "Error: no token allocator");
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if(mTokenAllocator) {
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CToken* theAttrToken=0;
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while((theAttrToken=NS_STATIC_CAST(CToken*,mAttributes->Pop()))) {
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IF_FREE(theAttrToken, mTokenAllocator);
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}
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}
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delete mAttributes;
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mAttributes=0;
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}
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if(mTokenAllocator) {
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// It was heap allocated, so free it!
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IF_FREE(mToken,mTokenAllocator);
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}
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return NS_OK;
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}
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nsresult
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nsCParserNode::GetIDAttributeAtom(nsIAtom** aResult) const
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{
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NS_ENSURE_ARG_POINTER(aResult);
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*aResult = mIDAttributeAtom;
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NS_IF_ADDREF(*aResult);
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return NS_OK;
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}
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nsresult
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nsCParserNode::SetIDAttributeAtom(nsIAtom* aID)
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{
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NS_ENSURE_ARG(aID);
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mIDAttributeAtom = aID;
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return NS_OK;
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}
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