Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /*
       3             :  * This file is part of the LibreOffice project.
       4             :  *
       5             :  * This Source Code Form is subject to the terms of the Mozilla Public
       6             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8             :  *
       9             :  * This file incorporates work covered by the following license notice:
      10             :  *
      11             :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12             :  *   contributor license agreements. See the NOTICE file distributed
      13             :  *   with this work for additional information regarding copyright
      14             :  *   ownership. The ASF licenses this file to you under the Apache
      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             : #ifndef INCLUDED_UNO_CURRENT_CONTEXT_HXX
      20             : #define INCLUDED_UNO_CURRENT_CONTEXT_HXX
      21             : 
      22             : #include <uno/current_context.h>
      23             : #include <uno/lbnames.h>
      24             : 
      25             : #include <com/sun/star/uno/XCurrentContext.hpp>
      26             : 
      27             : 
      28             : namespace com
      29             : {
      30             : namespace sun
      31             : {
      32             : namespace star
      33             : {
      34             : namespace uno
      35             : {
      36             : 
      37             : /** Getting the current context.
      38             :     @attention
      39             :     Don't spread the returned interface around to other threads.  Every thread has its own
      40             :     current context.
      41             : 
      42             :     @return current context or null ref, if none is set
      43             : */
      44           2 : inline Reference< XCurrentContext > SAL_CALL getCurrentContext()
      45             :     SAL_THROW(())
      46             : {
      47           2 :     Reference< XCurrentContext > xRet;
      48           4 :     ::rtl::OUString aEnvTypeName( CPPU_CURRENT_LANGUAGE_BINDING_NAME );
      49           2 :     ::uno_getCurrentContext( (void **)&xRet, aEnvTypeName.pData, 0 );
      50           4 :     return xRet;
      51             : }
      52             : /** Setting the current context.
      53             : 
      54             :     @param xContext current context to be set
      55             :     @return true, if context has been successfully set
      56             : */
      57           1 : inline bool SAL_CALL setCurrentContext(
      58             :     Reference< XCurrentContext > const & xContext )
      59             :     SAL_THROW(())
      60             : {
      61           1 :     ::rtl::OUString aEnvTypeName( CPPU_CURRENT_LANGUAGE_BINDING_NAME );
      62           1 :     return (::uno_setCurrentContext( xContext.get(), aEnvTypeName.pData, 0 ) != sal_False);
      63             : }
      64             : 
      65             : /** Objects of this class are used for applying a current context until they are destructed, i.e.
      66             :     the ctor of this class saves the previous and sets the given context while the dtor restores
      67             :     the previous one upon destruction.
      68             : */
      69             : class ContextLayer
      70             : {
      71             :     /** this C++ environment type name.
      72             :     */
      73             :     ::rtl::OUString m_aEnvTypeName;
      74             :     /** previous context
      75             :     */
      76             :     Reference< XCurrentContext > m_xPreviousContext;
      77             : 
      78             : public:
      79             :     /** Constructor: Saves the previous context and sets the new (given) one.
      80             : 
      81             :         @param xNewContext new context to be set
      82             :     */
      83             :     inline ContextLayer(
      84             :         Reference< XCurrentContext > const & xNewContext = Reference< XCurrentContext >() )
      85             :         SAL_THROW(());
      86             :     /** Destructor: restores the previous context.
      87             :     */
      88             :     inline ~ContextLayer() SAL_THROW(());
      89             : 
      90             :     /** Gets the previously set context.
      91             : 
      92             :         @return the previously set context
      93             :     */
      94             :     inline Reference< XCurrentContext > SAL_CALL getPreviousContext() const
      95             :         SAL_THROW(())
      96             :         { return m_xPreviousContext; }
      97             : };
      98             : 
      99           1 : inline ContextLayer::ContextLayer( Reference< XCurrentContext > const & xNewContext )
     100             :     SAL_THROW(())
     101           1 :     : m_aEnvTypeName( CPPU_CURRENT_LANGUAGE_BINDING_NAME )
     102             : {
     103           1 :     ::uno_getCurrentContext( (void **)&m_xPreviousContext, m_aEnvTypeName.pData, 0 );
     104           1 :     ::uno_setCurrentContext( xNewContext.get(), m_aEnvTypeName.pData, 0 );
     105           1 : }
     106             : 
     107           2 : inline ContextLayer::~ContextLayer()
     108             :     SAL_THROW(())
     109             : {
     110           1 :     ::uno_setCurrentContext( m_xPreviousContext.get(), m_aEnvTypeName.pData, 0 );
     111           1 : }
     112             : 
     113             : }
     114             : }
     115             : }
     116             : }
     117             : 
     118             : #endif
     119             : 
     120             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */