forms/source/xforms/pathexpression.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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   9  * This file incorporates work covered by the following license notice:
  10  *
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  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #pragma once
  21
  22 #include "computedexpression.hxx"
  23
  24 #include <vector>
  25
  26 // forward declarations
  27 namespace com::sun::star::xml::dom
  28 {
  29 class XNodeList;
  30 namespace events
  31 {
  32 class XEventListener;
  33 }
  34 }
  35
  36 namespace xforms
  37 {
  38 /** PathExpression represents an XPath Expression and caches results */
  39 class PathExpression final : public ComputedExpression
  40 {
  41 public:
  42     typedef std::vector<css::uno::Reference<css::xml::dom::XNode>> NodeVector_t;
  43
  44 private:
  45     /// the node-list result from the last bind (cached from mxResult)
  46     NodeVector_t maNodes;
  47
  48     /// get expression for evaluation
  49     OUString _getExpressionForEvaluation() const;
  50
  51 public:
  52     PathExpression();
  53     ~PathExpression();
  54
  55     /// set the expression string
  56     /// (overridden to do remove old listeners)
  57     /// (also defines simple expressions)
  58     void setExpression(const OUString& rExpression);
  59
  60     /// evaluate the expression relative to the content node.
  61     void evaluate(const xforms::EvaluationContext& rContext);
  62
  63     // get the result of this expression as node/node list/...
  64     css::uno::Reference<css::xml::dom::XNode> getNode() const;
  65     const NodeVector_t& getNodeList() const { return maNodes; }
  66     css::uno::Reference<css::xml::dom::XNodeList> getXNodeList() const;
  67 };
  68
  69 } // namespace xforms
  70
  71 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */