vcl/source/app/salusereventlist.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 <salusereventlist.hxx>
  21 #include <salwtype.hxx>
  22
  23 #include <algorithm>
  24 #include <cstdlib>
  25 #include <exception>
  26 #include <typeinfo>
  27
  28 #include <com/sun/star/uno/Exception.hpp>
  29 #include <tools/debug.hxx>
  30 #include <tools/diagnose_ex.h>
  31 #include <sal/log.hxx>
  32 #include <sal/types.h>
  33 #include <svdata.hxx>
  34
  35 SalUserEventList::SalUserEventList()
  36     : m_bAllUserEventProcessedSignaled( true )
  37     , m_aProcessingThread(0)
  38 {
  39 }
  40
  41 SalUserEventList::~SalUserEventList() COVERITY_NOEXCEPT_FALSE
  42 {
  43 }
  44
  45 void SalUserEventList::insertFrame( SalFrame* pFrame )
  46 {
  47     auto aPair = m_aFrames.insert( pFrame );
  48     assert( aPair.second ); (void) aPair;
  49 }
  50
  51 void SalUserEventList::eraseFrame( SalFrame* pFrame )
  52 {
  53     auto it = m_aFrames.find( pFrame );
  54     assert( it != m_aFrames.end() );
  55     if ( it != m_aFrames.end() )
  56         m_aFrames.erase( it );
  57 }
  58
  59 bool SalUserEventList::DispatchUserEvents( bool bHandleAllCurrentEvents )
  60 {
  61     bool bWasEvent = false;
  62     oslThreadIdentifier aCurId = osl::Thread::getCurrentIdentifier();
  63
  64     DBG_TESTSOLARMUTEX();
  65     osl::ResettableMutexGuard aResettableListGuard(m_aUserEventsMutex);
  66
  67     if (!m_aUserEvents.empty())
  68     {
  69         if (bHandleAllCurrentEvents)
  70         {
  71             if (m_aProcessingUserEvents.empty())
  72                 m_aProcessingUserEvents.swap(m_aUserEvents);
  73             else
  74                 m_aProcessingUserEvents.splice(m_aProcessingUserEvents.end(), m_aUserEvents);
  75         }
  76         else if (m_aProcessingUserEvents.empty())
  77         {
  78             m_aProcessingUserEvents.push_back( m_aUserEvents.front() );
  79             m_aUserEvents.pop_front();
  80         }
  81     }
  82
  83     if (HasUserEvents())
  84     {
  85         bWasEvent = true;
  86         m_aProcessingThread = aCurId;
  87
  88         SalUserEvent aEvent( nullptr, nullptr, SalEvent::NONE );
  89         do {
  90             if (m_aProcessingUserEvents.empty() || aCurId != m_aProcessingThread)
  91                 break;
  92             aEvent = m_aProcessingUserEvents.front();
  93             m_aProcessingUserEvents.pop_front();
  94
  95             // remember to reset the guard before break or continue the loop
  96             aResettableListGuard.clear();
  97
  98             if ( !isFrameAlive( aEvent.m_pFrame ) )
  99             {
 100                 if ( aEvent.m_nEvent == SalEvent::UserEvent )
 101                     delete static_cast< ImplSVEvent* >( aEvent.m_pData );
 102                 aResettableListGuard.reset();
 103                 continue;
 104             }
 105
 106             try
 107             {
 108                 ProcessEvent( aEvent );
 109             }
 110             catch (css::uno::Exception&)
 111             {
 112                 TOOLS_WARN_EXCEPTION("vcl", "Uncaught");
 113                 std::abort();
 114             }
 115             catch (std::exception& e)
 116             {
 117                 SAL_WARN("vcl", "Uncaught " << typeid(e).name() << " " << e.what());
 118                 std::abort();
 119             }
 120             catch (...)
 121             {
 122                 SAL_WARN("vcl", "Uncaught exception during DispatchUserEvents!");
 123                 std::abort();
 124             }
 125             aResettableListGuard.reset();
 126             if (!bHandleAllCurrentEvents)
 127                 break;
 128         }
 129         while( true );
 130     }
 131
 132     if ( !m_bAllUserEventProcessedSignaled && !HasUserEvents() )
 133     {
 134         m_bAllUserEventProcessedSignaled = true;
 135         TriggerAllUserEventsProcessed();
 136     }
 137
 138     return bWasEvent;
 139 }
 140
 141 void SalUserEventList::RemoveEvent( SalFrame* pFrame, void* pData, SalEvent nEvent )
 142 {
 143     SalUserEvent aEvent( pFrame, pData, nEvent );
 144
 145     osl::MutexGuard aGuard( m_aUserEventsMutex );
 146     auto it = std::find( m_aUserEvents.begin(), m_aUserEvents.end(), aEvent );
 147     if ( it != m_aUserEvents.end() )
 148     {
 149         m_aUserEvents.erase( it );
 150     }
 151     else
 152     {
 153         it = std::find( m_aProcessingUserEvents.begin(), m_aProcessingUserEvents.end(), aEvent );
 154         if ( it != m_aProcessingUserEvents.end() )
 155         {
 156             m_aProcessingUserEvents.erase( it );
 157         }
 158     }
 159
 160     if ( !m_bAllUserEventProcessedSignaled && !HasUserEvents() )
 161     {
 162         m_bAllUserEventProcessedSignaled = true;
 163         TriggerAllUserEventsProcessed();
 164     }
 165 }
 166
 167 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */