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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 .
*/
#include "pathexpression.hxx"
#include "unohelper.hxx"
#include "evaluationcontext.hxx"
#include <com/sun/star/xml/dom/XNode.hpp>
#include <com/sun/star/xml/dom/XNodeList.hpp>
#include <com/sun/star/xml/xpath/XXPathObject.hpp>
#include <osl/diagnose.h>
#include <algorithm>
using com::sun::star::uno::Reference;
using com::sun::star::xml::dom::XNode;
using com::sun::star::xml::dom::XNodeList;
using namespace std;
namespace xforms
{
PathExpression::PathExpression()
{
}
PathExpression::~PathExpression()
{
}
void PathExpression::setExpression( const OUString& rExpression )
{
// set new expression, and clear pre-computed results
ComputedExpression::setExpression( rExpression );
// check expression against regular expression to determine
// whether it contains only 'simple' (i.e. static) conditions. For
// now, we check whether it only contains number positions.
// (TODO: Only works for names containing only ASCII letters+digits.)
mbIsSimple =
_checkExpression( "( */@?[a-zA-Z0-9:]+( *\\[ *[0-9 ]+ *\\] *)?)+" );
maNodes.clear();
}
OUString PathExpression::_getExpressionForEvaluation() const
{
OUString sExpr = ComputedExpression::_getExpressionForEvaluation();
if( sExpr.isEmpty())
sExpr = ".";
return sExpr;
}
void PathExpression::evaluate( const EvaluationContext& rContext )
{
// for simple expression we don't need to re-bind (if we were bound before)
// (we will evaluate empty expressions, since they are interpreted as ".")
if( mxResult.is() && isSimpleExpression() )
return;
_evaluate( rContext, _getExpressionForEvaluation() );
// clear old result, and copy new
maNodes.clear();
if( mxResult.is() )
{
// copy node list
Reference<XNodeList> xNodeList = mxResult->getNodeList();
OSL_ENSURE( xNodeList.is(), "empty object (instead of empty list)" );
sal_Int32 nLength = xNodeList.is() ? xNodeList->getLength() : 0;
for( sal_Int32 n = 0; n < nLength; n++ )
maNodes.push_back( xNodeList->item( n ) );
}
}
Reference<XNode> PathExpression::getNode() const
{
Reference<XNode> xResult;
if( ! maNodes.empty() )
xResult = *maNodes.begin();
return xResult;
}
Reference<XNodeList> PathExpression::getXNodeList() const
{
return mxResult.is() ? mxResult->getNodeList() : Reference<XNodeList>();
}
} // namespace xforms
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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