toolkit/source/awt/asynccallback.cxx

   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
  20 #include <sal/config.h>
  21
  22 #include <utility>
  23 #include <vcl/svapp.hxx>
  24 #include <cppuhelper/implbase.hxx>
  25 #include <cppuhelper/supportsservice.hxx>
  26 #include <com/sun/star/lang/XServiceInfo.hpp>
  27 #include <com/sun/star/uno/XComponentContext.hpp>
  28 #include <com/sun/star/awt/XRequestCallback.hpp>
  29
  30 /// anonymous implementation namespace
  31 namespace {
  32
  33 class AsyncCallback:
  34     public ::cppu::WeakImplHelper<
  35         css::lang::XServiceInfo,
  36         css::awt::XRequestCallback>
  37 {
  38 public:
  39     AsyncCallback() {}
  40     AsyncCallback(const AsyncCallback&) = delete;
  41     AsyncCallback& operator=(const AsyncCallback&) = delete;
  42
  43     // css::lang::XServiceInfo:
  44     virtual OUString SAL_CALL getImplementationName() override;
  45     virtual sal_Bool SAL_CALL supportsService(const OUString & ServiceName) override;
  46     virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
  47
  48     // css::awt::XRequestCallback:
  49     virtual void SAL_CALL addCallback(const css::uno::Reference< css::awt::XCallback > & xCallback, const css::uno::Any & aData) override;
  50
  51 private:
  52
  53     struct CallbackData
  54     {
  55         CallbackData( css::uno::Reference< css::awt::XCallback > _xCallback, css::uno::Any aAny ) :
  56             xCallback(std::move( _xCallback )), aData(std::move( aAny )) {}
  57
  58         css::uno::Reference< css::awt::XCallback > xCallback;
  59         css::uno::Any                              aData;
  60     };
  61
  62     DECL_STATIC_LINK( AsyncCallback, Notify_Impl, void*, void );
  63
  64     virtual ~AsyncCallback() override {}
  65 };
  66
  67 // com.sun.star.uno.XServiceInfo:
  68 OUString SAL_CALL AsyncCallback::getImplementationName()
  69 {
  70     return u"com.sun.star.awt.comp.AsyncCallback"_ustr;
  71 }
  72
  73 sal_Bool SAL_CALL AsyncCallback::supportsService(OUString const & serviceName)
  74 {
  75     return cppu::supportsService(this, serviceName);
  76 }
  77
  78 css::uno::Sequence< OUString > SAL_CALL AsyncCallback::getSupportedServiceNames()
  79 {
  80     return { u"com.sun.star.awt.AsyncCallback"_ustr };
  81 }
  82
  83 // css::awt::XRequestCallback:
  84 void SAL_CALL AsyncCallback::addCallback(const css::uno::Reference< css::awt::XCallback > & xCallback, const css::uno::Any & aData)
  85 {
  86     if ( Application::IsInMain() )
  87     {
  88         // NOTE: We don't need SolarMutexGuard here as Application::PostUserEvent is thread-safe
  89         CallbackData* pCallbackData = new CallbackData( xCallback, aData );
  90         Application::PostUserEvent( LINK( this, AsyncCallback, Notify_Impl ), pCallbackData );
  91     }
  92 }
  93
  94 // private asynchronous link to call reference to the callback object
  95 IMPL_STATIC_LINK( AsyncCallback, Notify_Impl, void*, p, void )
  96 {
  97     CallbackData* pCallbackData = static_cast<CallbackData*>(p);
  98     try
  99     {
 100         // Asynchronous execution
 101         // Check pointer and reference before!
 102         if ( pCallbackData && pCallbackData->xCallback.is() )
 103             pCallbackData->xCallback->notify( pCallbackData->aData );
 104     }
 105     catch ( css::uno::Exception& )
 106     {
 107     }
 108
 109     delete pCallbackData;
 110 }
 111
 112 } // closing anonymous implementation namespace
 113
 114 extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface *
 115 com_sun_star_awt_comp_AsyncCallback_get_implementation(
 116     css::uno::XComponentContext *,
 117     css::uno::Sequence<css::uno::Any> const &)
 118 {
 119     return cppu::acquire(new AsyncCallback());
 120 }
 121
 122 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */