1 files changed, 116 insertions, 0 deletions
diff --git a/forms/source/xforms/pathexpression.cxx b/forms/source/xforms/pathexpression.cxx
new file mode 100644
index 000000000..ea8fb8e63
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+++ b/forms/source/xforms/pathexpression.cxx
@@ -0,0 +1,116 @@
+/* -*- 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()
+    : ComputedExpression(),
+      maNodes()
+{
+}
+
+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: */