RetroZilla/extensions/transformiix/source/xpath/nsXPathEvaluator.cpp
2015-10-20 23:03:22 -04:00

211 lines
6.4 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is TransforMiiX XSLT processor code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 2001
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Peter Van der Beken <peterv@propagandism.org>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsXPathEvaluator.h"
#include "nsCOMPtr.h"
#include "nsIAtom.h"
#include "nsIDOMClassInfo.h"
#include "nsXPathException.h"
#include "nsXPathExpression.h"
#include "nsXPathNSResolver.h"
#include "nsXPathResult.h"
#include "nsContentCID.h"
#include "Expr.h"
#include "ExprParser.h"
#include "nsDOMError.h"
#include "txURIUtils.h"
#include "nsIDocument.h"
#include "nsIDOMDocument.h"
#include "nsDOMString.h"
#include "nsINameSpaceManager.h"
#include "txError.h"
extern nsINameSpaceManager* gTxNameSpaceManager;
NS_IMPL_ADDREF(nsXPathEvaluator)
NS_IMPL_RELEASE(nsXPathEvaluator)
NS_INTERFACE_MAP_BEGIN(nsXPathEvaluator)
NS_INTERFACE_MAP_ENTRY(nsIDOMXPathEvaluator)
NS_INTERFACE_MAP_ENTRY(nsIXPathEvaluatorInternal)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDOMXPathEvaluator)
NS_INTERFACE_MAP_ENTRY_EXTERNAL_DOM_CLASSINFO(XPathEvaluator)
NS_INTERFACE_MAP_END
nsXPathEvaluator::nsXPathEvaluator()
{
}
nsXPathEvaluator::~nsXPathEvaluator()
{
}
NS_IMETHODIMP
nsXPathEvaluator::CreateExpression(const nsAString & aExpression,
nsIDOMXPathNSResolver *aResolver,
nsIDOMXPathExpression **aResult)
{
nsresult rv = NS_OK;
if (!mRecycler) {
nsRefPtr<txResultRecycler> recycler = new txResultRecycler;
NS_ENSURE_TRUE(recycler, NS_ERROR_OUT_OF_MEMORY);
rv = recycler->init();
NS_ENSURE_SUCCESS(rv, rv);
mRecycler = recycler;
}
nsCOMPtr<nsIDocument> doc = do_QueryReferent(mDocument);
ParseContextImpl pContext(aResolver, !doc || doc->IsCaseSensitive());
nsAutoPtr<Expr> expression;
rv = txExprParser::createExpr(PromiseFlatString(aExpression), &pContext,
getter_Transfers(expression));
if (NS_FAILED(rv)) {
if (rv == NS_ERROR_DOM_NAMESPACE_ERR) {
return NS_ERROR_DOM_NAMESPACE_ERR;
}
return NS_ERROR_DOM_INVALID_EXPRESSION_ERR;
}
*aResult = new nsXPathExpression(expression, mRecycler);
if (!*aResult) {
return NS_ERROR_OUT_OF_MEMORY;
}
NS_ADDREF(*aResult);
return NS_OK;
}
NS_IMETHODIMP
nsXPathEvaluator::CreateNSResolver(nsIDOMNode *aNodeResolver,
nsIDOMXPathNSResolver **aResult)
{
NS_ENSURE_ARG(aNodeResolver);
if (!URIUtils::CanCallerAccess(aNodeResolver))
return NS_ERROR_DOM_SECURITY_ERR;
*aResult = new nsXPathNSResolver(aNodeResolver);
NS_ENSURE_TRUE(*aResult, NS_ERROR_OUT_OF_MEMORY);
NS_ADDREF(*aResult);
return NS_OK;
}
NS_IMETHODIMP
nsXPathEvaluator::Evaluate(const nsAString & aExpression,
nsIDOMNode *aContextNode,
nsIDOMXPathNSResolver *aResolver,
PRUint16 aType,
nsISupports *aInResult,
nsISupports **aResult)
{
// XXX Need to check document of aContextNode if created by
// QI'ing a document.
nsCOMPtr<nsIDOMXPathExpression> expression;
nsresult rv = CreateExpression(aExpression, aResolver,
getter_AddRefs(expression));
NS_ENSURE_SUCCESS(rv, rv);
return expression->Evaluate(aContextNode, aType, aInResult, aResult);
}
NS_IMETHODIMP
nsXPathEvaluator::SetDocument(nsIDOMDocument* aDocument)
{
mDocument = do_GetWeakReference(aDocument);
return NS_OK;
}
/*
* Implementation of txIParseContext private to nsXPathEvaluator
* ParseContextImpl bases on a nsIDOMXPathNSResolver
*/
nsresult nsXPathEvaluator::ParseContextImpl::resolveNamespacePrefix
(nsIAtom* aPrefix, PRInt32& aID)
{
aID = kNameSpaceID_Unknown;
if (!mResolver) {
return NS_ERROR_DOM_NAMESPACE_ERR;
}
nsAutoString prefix;
if (aPrefix) {
aPrefix->ToString(prefix);
}
nsVoidableString ns;
nsresult rv = mResolver->LookupNamespaceURI(prefix, ns);
NS_ENSURE_SUCCESS(rv, rv);
if (DOMStringIsNull(ns)) {
return NS_ERROR_DOM_NAMESPACE_ERR;
}
if (ns.IsEmpty()) {
aID = kNameSpaceID_None;
return NS_OK;
}
// get the namespaceID for the URI
return gTxNameSpaceManager->RegisterNameSpace(ns, aID);
}
nsresult
nsXPathEvaluator::ParseContextImpl::resolveFunctionCall(nsIAtom* aName,
PRInt32 aID,
FunctionCall*& aFn)
{
return NS_ERROR_XPATH_UNKNOWN_FUNCTION;
}
PRBool nsXPathEvaluator::ParseContextImpl::caseInsensitiveNameTests()
{
return !mIsCaseSensitive;
}
void
nsXPathEvaluator::ParseContextImpl::SetErrorOffset(PRUint32 aOffset)
{
}