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