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/* -*- 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 <windowstateguard.hxx>
#include <frm_strings.hxx>
#include <com/sun/star/awt/XWindowListener2.hpp>
#include <com/sun/star/beans/XPropertySet.hpp>
#include <cppuhelper/implbase.hxx>
#include <tools/diagnose_ex.h>
namespace frm
{
using ::com::sun::star::awt::XWindowListener2;
using ::com::sun::star::uno::Reference;
using ::com::sun::star::awt::XWindow2;
using ::com::sun::star::awt::WindowEvent;
using ::com::sun::star::uno::RuntimeException;
using ::com::sun::star::awt::XControlModel;
using ::com::sun::star::beans::XPropertySet;
using ::com::sun::star::lang::EventObject;
using ::com::sun::star::uno::UNO_QUERY;
using ::com::sun::star::uno::Exception;
typedef ::cppu::WeakImplHelper < XWindowListener2
> WindowStateGuard_Impl_Base;
class WindowStateGuard_Impl : public WindowStateGuard_Impl_Base
{
private:
::osl::Mutex m_aMutex;
Reference< XWindow2 > m_xWindow;
Reference< XPropertySet > m_xModelProps;
public:
/** constructs the instance
@param _rxWindow
the window at which to listen. Must not be <NULL/>.
@param _rxModel
the model which acts as the reference for the states to be enforced. Must not be <NULL/>.
*/
WindowStateGuard_Impl( const Reference< XWindow2 >& _rxWindow, const Reference< XPropertySet >& _rxMdelProps );
void dispose();
protected:
// XWindowListener2
virtual void SAL_CALL windowEnabled( const css::lang::EventObject& e ) override;
virtual void SAL_CALL windowDisabled( const css::lang::EventObject& e ) override;
// XWindowListener
virtual void SAL_CALL windowResized( const css::awt::WindowEvent& e ) override;
virtual void SAL_CALL windowMoved( const css::awt::WindowEvent& e ) override;
virtual void SAL_CALL windowShown( const css::lang::EventObject& e ) override;
virtual void SAL_CALL windowHidden( const css::lang::EventObject& e ) override;
// XEventListener
virtual void SAL_CALL disposing( const css::lang::EventObject& Source ) override;
private:
/** ensures that the window's Enabled state matches what is described at the model
@precond
our mutex is locked
*/
void impl_ensureEnabledState_nothrow_nolck();
};
WindowStateGuard_Impl::WindowStateGuard_Impl( const Reference< XWindow2 >& _rxWindow, const Reference< XPropertySet >& _rxMdelProps )
:m_xWindow( _rxWindow )
,m_xModelProps( _rxMdelProps )
{
if ( !m_xWindow.is() || !m_xModelProps.is() )
throw RuntimeException();
osl_atomic_increment( &m_refCount );
{
m_xWindow->addWindowListener( this );
}
osl_atomic_decrement( &m_refCount );
}
void WindowStateGuard_Impl::dispose()
{
::osl::MutexGuard aGuard( m_aMutex );
if ( !m_xWindow.is() )
// already disposed
return;
m_xWindow->removeWindowListener( this );
m_xWindow.clear();
}
void WindowStateGuard_Impl::impl_ensureEnabledState_nothrow_nolck()
{
try
{
Reference< XWindow2 > xWindow;
Reference< XPropertySet > xModelProps;
bool bShouldBeEnabled = false;
{
::osl::MutexGuard aGuard( m_aMutex );
if ( !m_xWindow.is() || !m_xModelProps.is() )
return;
xWindow = m_xWindow;
xModelProps = m_xModelProps;
}
// fdo#42157: do not lock m_aMutex to prevent deadlock
bool const bEnabled = xWindow->isEnabled();
OSL_VERIFY( xModelProps->getPropertyValue( PROPERTY_ENABLED )
>>= bShouldBeEnabled );
if ( !bShouldBeEnabled && bEnabled )
xWindow->setEnable( false );
}
catch( const Exception& )
{
DBG_UNHANDLED_EXCEPTION("forms.helper");
}
}
void SAL_CALL WindowStateGuard_Impl::windowEnabled( const EventObject& /*e*/ )
{
impl_ensureEnabledState_nothrow_nolck();
}
void SAL_CALL WindowStateGuard_Impl::windowDisabled( const EventObject& /*e*/ )
{
impl_ensureEnabledState_nothrow_nolck();
}
void SAL_CALL WindowStateGuard_Impl::windowResized( const WindowEvent& /*e*/ )
{
// not interested in
}
void SAL_CALL WindowStateGuard_Impl::windowMoved( const WindowEvent& /*e*/ )
{
// not interested in
}
void SAL_CALL WindowStateGuard_Impl::windowShown( const EventObject& /*e*/ )
{
// not interested in
}
void SAL_CALL WindowStateGuard_Impl::windowHidden( const EventObject& /*e*/ )
{
// not interested in
}
void SAL_CALL WindowStateGuard_Impl::disposing( const EventObject& Source )
{
OSL_ENSURE( Source.Source == m_xWindow, "WindowStateGuard_Impl::disposing: where does this come from?" );
dispose();
}
WindowStateGuard::WindowStateGuard()
{
}
WindowStateGuard::~WindowStateGuard()
{
}
void WindowStateGuard::attach( const Reference< XWindow2 >& _rxWindow, const Reference< XControlModel >& _rxModel )
{
if ( m_pImpl.is() )
{
m_pImpl->dispose();
m_pImpl = nullptr;
}
Reference< XPropertySet > xModelProps( _rxModel, UNO_QUERY );
OSL_ENSURE( xModelProps.is() || !_rxModel.is(), "WindowStateGuard::attach: a model which is no XPropertySet?" );
if ( _rxWindow.is() && xModelProps.is() )
m_pImpl = new WindowStateGuard_Impl( _rxWindow, xModelProps );
}
} // namespace frm
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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