RetroZilla/extensions/transformiix/source/xpath/nsXFormsXPathEvaluator.cpp

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2015-10-21 05:03:22 +02:00
/* -*- 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 Mozilla XForms support.
*
* The Initial Developer of the Original Code is
* IBM Corporation.
* Portions created by the Initial Developer are Copyright (C) 2004
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Aaron Reed <aaronr@us.ibm.com>
* Merle Sterling <msterlin@us.ibm.com>
*
* 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 "nsXFormsXPathEvaluator.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"
#include "txAtoms.h"
#include "XFormsFunctions.h"
#include "nsIDOM3Node.h"
extern nsINameSpaceManager* gTxNameSpaceManager;
NS_IMPL_ADDREF(nsXFormsXPathEvaluator)
NS_IMPL_RELEASE(nsXFormsXPathEvaluator)
NS_INTERFACE_MAP_BEGIN(nsXFormsXPathEvaluator)
NS_INTERFACE_MAP_ENTRY(nsIXFormsXPathEvaluator)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIXFormsXPathEvaluator)
NS_INTERFACE_MAP_END
nsXFormsXPathEvaluator::nsXFormsXPathEvaluator()
{
}
nsXFormsXPathEvaluator::~nsXFormsXPathEvaluator()
{
}
NS_IMETHODIMP
nsXFormsXPathEvaluator::CreateExpression(const nsAString & aExpression,
nsIDOMNode *aResolverNode,
nsIDOMNode *aOrigCtxt,
nsIDOMNSXPathExpression **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;
}
XFormsParseContextImpl pContext(aResolverNode, aOrigCtxt);
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
nsXFormsXPathEvaluator::Evaluate(const nsAString & aExpression,
nsIDOMNode *aContextNode,
PRUint32 aPosition,
PRUint32 aSize,
nsIDOMNode *aResolverNode,
nsIDOMNode *aOrigCtxt,
PRUint16 aType,
nsISupports *aInResult,
nsISupports **aResult)
{
// XXX Need to check document of aContextNode if created by
// QI'ing a document.
nsCOMPtr<nsIDOMNSXPathExpression> expression;
nsresult rv = CreateExpression(aExpression, aResolverNode, aOrigCtxt,
getter_AddRefs(expression));
NS_ENSURE_SUCCESS(rv, rv);
return expression->EvaluateWithContext(aContextNode, aPosition, aSize,
aType, aInResult, aResult);
}
/*
* Implementation of txIParseContext private to nsXFormsXPathEvaluator
* XFormsParseContextImpl bases on a nsIDOMXPathNSResolver
*/
nsresult nsXFormsXPathEvaluator::XFormsParseContextImpl::resolveNamespacePrefix
(nsIAtom* aPrefix, PRInt32& aID)
{
aID = kNameSpaceID_Unknown;
if (!mResolverNode) {
return NS_ERROR_DOM_NAMESPACE_ERR;
}
nsAutoString prefix;
if (aPrefix) {
aPrefix->ToString(prefix);
}
nsVoidableString ns;
nsresult rv;
// begin - taken directly from nsXPathNSResolver::LookupNamespaceURI
if (prefix.EqualsLiteral("xml")) {
ns.AssignLiteral("http://www.w3.org/XML/1998/namespace");
rv = NS_OK;
}
else {
nsCOMPtr<nsIDOM3Node> dom3Node = do_QueryInterface(mResolverNode);
NS_ASSERTION(dom3Node, "Need a node to resolve namespaces.");
if( dom3Node ) {
rv = dom3Node->LookupNamespaceURI(prefix, ns);
}
else {
SetDOMStringToNull(ns);
rv = NS_OK;
}
}
// end - taken directly from nsXPathNSResolver::LookupNamespaceURI
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
nsXFormsXPathEvaluator::XFormsParseContextImpl::resolveFunctionCall(
nsIAtom* aName,
PRInt32 aNamespaceID,
FunctionCall*& aFnCall)
{
if (aNamespaceID == kNameSpaceID_None) {
PRBool isOutOfMem = PR_TRUE;
if (aName == txXPathAtoms::avg) {
aFnCall = new XFormsFunctionCall(XFormsFunctionCall::AVG);
}
else if (aName == txXPathAtoms::booleanFromString) {
aFnCall = new XFormsFunctionCall(XFormsFunctionCall::BOOLEANFROMSTRING);
}
else if (aName == txXPathAtoms::countNonEmpty) {
aFnCall = new XFormsFunctionCall(XFormsFunctionCall::COUNTNONEMPTY);
}
else if (aName == txXPathAtoms::daysFromDate) {
aFnCall = new XFormsFunctionCall(XFormsFunctionCall::DAYSFROMDATE);
}
else if (aName == txXPathAtoms::ifFunc) {
aFnCall = new XFormsFunctionCall(XFormsFunctionCall::IF);
}
else if (aName == txXPathAtoms::index) {
NS_ENSURE_TRUE(mResolverNode, NS_ERROR_FAILURE);
aFnCall = new XFormsFunctionCall(XFormsFunctionCall::INDEX,
mResolverNode);
}
else if (aName == txXPathAtoms::instance) {
NS_ENSURE_TRUE(mResolverNode, NS_ERROR_FAILURE);
aFnCall = new XFormsFunctionCall(XFormsFunctionCall::INSTANCE,
mResolverNode);
}
else if (aName == txXPathAtoms::max) {
aFnCall = new XFormsFunctionCall(XFormsFunctionCall::MAX);
}
else if (aName == txXPathAtoms::min) {
aFnCall = new XFormsFunctionCall(XFormsFunctionCall::MIN);
}
else if (aName == txXPathAtoms::months) {
aFnCall = new XFormsFunctionCall(XFormsFunctionCall::MONTHS);
}
else if (aName == txXPathAtoms::now) {
aFnCall = new XFormsFunctionCall(XFormsFunctionCall::NOW);
}
else if (aName == txXPathAtoms::localDateTime) {
aFnCall = new XFormsFunctionCall(XFormsFunctionCall::LOCALDATETIME);
}
else if (aName == txXPathAtoms::localDate) {
aFnCall = new XFormsFunctionCall(XFormsFunctionCall::LOCALDATE);
}
else if (aName == txXPathAtoms::property) {
aFnCall = new XFormsFunctionCall(XFormsFunctionCall::PROPERTY);
}
else if (aName == txXPathAtoms::seconds) {
aFnCall = new XFormsFunctionCall(XFormsFunctionCall::SECONDS);
}
else if (aName == txXPathAtoms::secondsFromDateTime) {
aFnCall = new XFormsFunctionCall(XFormsFunctionCall::SECONDSFROMDATETIME);
}
else if (aName == txXPathAtoms::current) {
aFnCall = new XFormsFunctionCall(XFormsFunctionCall::CURRENT,
mOriginalContext);
}
else if (aName == txXPathAtoms::event) {
aFnCall = new XFormsFunctionCall(XFormsFunctionCall::EVENT,
mResolverNode);
}
else if (aName == txXPathAtoms::power) {
aFnCall = new XFormsFunctionCall(XFormsFunctionCall::POWER);
}
else if (aName == txXPathAtoms::random) {
aFnCall = new XFormsFunctionCall(XFormsFunctionCall::RANDOM);
}
else if (aName == txXPathAtoms::compare) {
aFnCall = new XFormsFunctionCall(XFormsFunctionCall::COMPARE);
}
else if (aName == txXPathAtoms::context) {
aFnCall = new XFormsFunctionCall(XFormsFunctionCall::CONTEXT,
mResolverNode);
}
else if (aName == txXPathAtoms::daysToDate) {
aFnCall = new XFormsFunctionCall(XFormsFunctionCall::DAYSTODATE);
}
else if (aName == txXPathAtoms::secondsToDateTime) {
aFnCall = new XFormsFunctionCall(XFormsFunctionCall::SECONDSTODATETIME);
}
else if (aName == txXPathAtoms::isCardNumber) {
aFnCall = new XFormsFunctionCall(XFormsFunctionCall::ISCARDNUMBER);
}
else if (aName == txXPathAtoms::digest) {
aFnCall = new XFormsFunctionCall(XFormsFunctionCall::DIGEST,
mResolverNode);
}
else if (aName == txXPathAtoms::adjustDateTimeToTimezone) {
aFnCall = new XFormsFunctionCall(XFormsFunctionCall::ADJUSTDATETIMETOTIMEZONE);
}
else {
// didn't find functioncall here, aFnCall should be null
isOutOfMem = PR_FALSE;
}
if (aFnCall)
{
return NS_OK;
}
else if (isOutOfMem) {
NS_ERROR("XPath FunctionLib failed on out-of-memory");
return NS_ERROR_OUT_OF_MEMORY;
}
}
return NS_ERROR_XPATH_UNKNOWN_FUNCTION;
}
PRBool nsXFormsXPathEvaluator::XFormsParseContextImpl::caseInsensitiveNameTests()
{
// This will always be false since this handles XForms, which is XML-based,
// so case sensitive.
return PR_FALSE;
}
void
nsXFormsXPathEvaluator::XFormsParseContextImpl::SetErrorOffset(PRUint32 aOffset)
{
}