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| -rw-r--r-- | extensions/source/propctrlr/propertycomposer.cxx | 484 |
1 files changed, 484 insertions, 0 deletions
diff --git a/extensions/source/propctrlr/propertycomposer.cxx b/extensions/source/propctrlr/propertycomposer.cxx new file mode 100644 index 000000000..d77280d9f --- /dev/null +++ b/extensions/source/propctrlr/propertycomposer.cxx @@ -0,0 +1,484 @@ +/* -*- 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 "propertycomposer.hxx" + +#include <com/sun/star/lang/NullPointerException.hpp> +#include <com/sun/star/lang/IllegalArgumentException.hpp> +#include <comphelper/sequence.hxx> +#include <osl/diagnose.h> +#include <tools/diagnose_ex.h> + +#include <algorithm> +#include <iterator> + + +namespace pcr +{ + + + using namespace ::com::sun::star::uno; + using namespace ::com::sun::star::beans; + using namespace ::com::sun::star::lang; + using namespace ::com::sun::star::inspection; + + + //= helper + + namespace + { + + struct SetPropertyValue + { + OUString sPropertyName; + const Any& rValue; + SetPropertyValue( const OUString& _rPropertyName, const Any& _rValue ) : sPropertyName( _rPropertyName ), rValue( _rValue ) { } + void operator()( const Reference< XPropertyHandler >& _rHandler ) + { + _rHandler->setPropertyValue( sPropertyName, rValue ); + } + }; + + + template < class BagType > + void putIntoBag( const Sequence< typename BagType::value_type >& _rArray, BagType& /* [out] */ _rBag ) + { + std::copy( _rArray.begin(), _rArray.end(), + std::insert_iterator< BagType >( _rBag, _rBag.begin() ) ); + } + + + template < class BagType > + void copyBagToArray( const BagType& /* [out] */ _rBag, Sequence< typename BagType::value_type >& _rArray ) + { + _rArray.realloc( _rBag.size() ); + std::copy( _rBag.begin(), _rBag.end(), _rArray.getArray() ); + } + } + + + //= PropertyComposer + + + // TODO: there are various places where we determine the first handler in our array which + // supports a given property id. This is, at the moment, done with searching all handlers, + // which is O( n * k ) at worst (n being the number of handlers, k being the maximum number + // of supported properties per handler). Shouldn't we cache this? So that it is O( log k )? + + + PropertyComposer::PropertyComposer( std::vector< Reference< XPropertyHandler > >&& _rSlaveHandlers ) + :PropertyComposer_Base ( m_aMutex ) + ,m_aSlaveHandlers ( std::move(_rSlaveHandlers) ) + ,m_aPropertyListeners ( m_aMutex ) + ,m_bSupportedPropertiesAreKnown ( false ) + { + if ( m_aSlaveHandlers.empty() ) + throw IllegalArgumentException(); + + osl_atomic_increment( &m_refCount ); + { + Reference< XPropertyChangeListener > xMeMyselfAndI( this ); + for (auto const& slaveHandler : m_aSlaveHandlers) + { + if ( !slaveHandler.is() ) + throw NullPointerException(); + slaveHandler->addPropertyChangeListener( xMeMyselfAndI ); + } + } + osl_atomic_decrement( &m_refCount ); + } + + + void SAL_CALL PropertyComposer::inspect( const Reference< XInterface >& _rxIntrospectee ) + { + MethodGuard aGuard( *this ); + + for (auto const& slaveHandler : m_aSlaveHandlers) + { + slaveHandler->inspect( _rxIntrospectee ); + } + } + + + Any SAL_CALL PropertyComposer::getPropertyValue( const OUString& _rPropertyName ) + { + MethodGuard aGuard( *this ); + return m_aSlaveHandlers[0]->getPropertyValue( _rPropertyName ); + } + + + void SAL_CALL PropertyComposer::setPropertyValue( const OUString& _rPropertyName, const Any& _rValue ) + { + MethodGuard aGuard( *this ); + std::for_each( m_aSlaveHandlers.begin(), m_aSlaveHandlers.end(), SetPropertyValue( _rPropertyName, _rValue ) ); + } + + + Any SAL_CALL PropertyComposer::convertToPropertyValue( const OUString& _rPropertyName, const Any& _rControlValue ) + { + MethodGuard aGuard( *this ); + return m_aSlaveHandlers[0]->convertToPropertyValue( _rPropertyName, _rControlValue ); + } + + + Any SAL_CALL PropertyComposer::convertToControlValue( const OUString& _rPropertyName, const Any& _rPropertyValue, const Type& _rControlValueType ) + { + MethodGuard aGuard( *this ); + return m_aSlaveHandlers[0]->convertToControlValue( _rPropertyName, _rPropertyValue, _rControlValueType ); + } + + + PropertyState SAL_CALL PropertyComposer::getPropertyState( const OUString& _rPropertyName ) + { + MethodGuard aGuard( *this ); + + // assume DIRECT for the moment. This will stay this way if *all* slaves + // tell the property has DIRECT state, and if *all* values equal + PropertyState eState = PropertyState_DIRECT_VALUE; + + // check the master state + Reference< XPropertyHandler > xPrimary( *m_aSlaveHandlers.begin() ); + Any aPrimaryValue = xPrimary->getPropertyValue( _rPropertyName ); + eState = xPrimary->getPropertyState( _rPropertyName ); + + // loop through the secondary sets + PropertyState eSecondaryState = PropertyState_DIRECT_VALUE; + for ( HandlerArray::const_iterator loop = m_aSlaveHandlers.begin() + 1; + loop != m_aSlaveHandlers.end(); + ++loop + ) + { + // the secondary state + eSecondaryState = (*loop)->getPropertyState( _rPropertyName ); + + // the secondary value + Any aSecondaryValue( (*loop)->getPropertyValue( _rPropertyName ) ); + + if ( ( PropertyState_AMBIGUOUS_VALUE == eSecondaryState ) // secondary is ambiguous + || ( aPrimaryValue != aSecondaryValue ) // unequal values + ) + { + eState = PropertyState_AMBIGUOUS_VALUE; + break; + } + } + + return eState; + } + + + void SAL_CALL PropertyComposer::addPropertyChangeListener( const Reference< XPropertyChangeListener >& _rxListener ) + { + MethodGuard aGuard( *this ); + m_aPropertyListeners.addInterface( _rxListener ); + } + + + void SAL_CALL PropertyComposer::removePropertyChangeListener( const Reference< XPropertyChangeListener >& _rxListener ) + { + MethodGuard aGuard( *this ); + m_aPropertyListeners.removeInterface( _rxListener ); + } + + + Sequence< Property > SAL_CALL PropertyComposer::getSupportedProperties() + { + MethodGuard aGuard( *this ); + + if ( !m_bSupportedPropertiesAreKnown ) + { + // we support a property if and only if all of our slaves support it + + // initially, use all the properties of an arbitrary handler (we take the first one) + putIntoBag( (*m_aSlaveHandlers.begin())->getSupportedProperties(), m_aSupportedProperties ); + + // now intersect with the properties of *all* other handlers + for ( HandlerArray::const_iterator loop = m_aSlaveHandlers.begin() + 1; + loop != m_aSlaveHandlers.end(); + ++loop + ) + { + // the properties supported by the current handler + PropertyBag aThisRound; + putIntoBag( (*loop)->getSupportedProperties(), aThisRound ); + + // the intersection of those properties with all we already have + PropertyBag aIntersection; + std::set_intersection( aThisRound.begin(), aThisRound.end(), m_aSupportedProperties.begin(), m_aSupportedProperties.end(), + std::insert_iterator< PropertyBag >( aIntersection, aIntersection.begin() ), PropertyLessByName() ); + + m_aSupportedProperties.swap( aIntersection ); + if ( m_aSupportedProperties.empty() ) + break; + } + + // remove those properties which are not composable + for ( PropertyBag::iterator check = m_aSupportedProperties.begin(); + check != m_aSupportedProperties.end(); + ) + { + bool bIsComposable = isComposable( check->Name ); + if ( !bIsComposable ) + { + check = m_aSupportedProperties.erase( check ); + } + else + ++check; + } + + m_bSupportedPropertiesAreKnown = true; + } + + return comphelper::containerToSequence( m_aSupportedProperties ); + } + + + static void uniteStringArrays( const PropertyComposer::HandlerArray& _rHandlers, Sequence< OUString > (SAL_CALL XPropertyHandler::*pGetter)( ), + Sequence< OUString >& /* [out] */ _rUnion ) + { + std::set< OUString > aUnitedBag; + + Sequence< OUString > aThisRound; + for (auto const& handler : _rHandlers) + { + aThisRound = (handler.get()->*pGetter)(); + putIntoBag( aThisRound, aUnitedBag ); + } + + copyBagToArray( aUnitedBag, _rUnion ); + } + + + Sequence< OUString > SAL_CALL PropertyComposer::getSupersededProperties( ) + { + MethodGuard aGuard( *this ); + + // we supersede those properties which are superseded by at least one of our slaves + Sequence< OUString > aSuperseded; + uniteStringArrays( m_aSlaveHandlers, &XPropertyHandler::getSupersededProperties, aSuperseded ); + return aSuperseded; + } + + + Sequence< OUString > SAL_CALL PropertyComposer::getActuatingProperties( ) + { + MethodGuard aGuard( *this ); + + // we're interested in those properties which at least one handler wants to have + Sequence< OUString > aActuating; + uniteStringArrays( m_aSlaveHandlers, &XPropertyHandler::getActuatingProperties, aActuating ); + return aActuating; + } + + + LineDescriptor SAL_CALL PropertyComposer::describePropertyLine( const OUString& _rPropertyName, + const Reference< XPropertyControlFactory >& _rxControlFactory ) + { + MethodGuard aGuard( *this ); + return m_aSlaveHandlers[0]->describePropertyLine( _rPropertyName, _rxControlFactory ); + } + + + sal_Bool SAL_CALL PropertyComposer::isComposable( const OUString& _rPropertyName ) + { + MethodGuard aGuard( *this ); + return m_aSlaveHandlers[0]->isComposable( _rPropertyName ); + } + + + InteractiveSelectionResult SAL_CALL PropertyComposer::onInteractivePropertySelection( const OUString& _rPropertyName, sal_Bool _bPrimary, Any& _rData, const Reference< XObjectInspectorUI >& _rxInspectorUI ) + { + if ( !_rxInspectorUI.is() ) + throw NullPointerException(); + + MethodGuard aGuard( *this ); + + impl_ensureUIRequestComposer( _rxInspectorUI ); + ComposedUIAutoFireGuard aAutoFireGuard( *m_pUIRequestComposer ); + + // ask the first of the handlers + InteractiveSelectionResult eResult = (*m_aSlaveHandlers.begin())->onInteractivePropertySelection( + _rPropertyName, + _bPrimary, + _rData, + m_pUIRequestComposer->getUIForPropertyHandler( *m_aSlaveHandlers.begin() ) + ); + + switch ( eResult ) + { + case InteractiveSelectionResult_Cancelled: + // fine + break; + + case InteractiveSelectionResult_Success: + case InteractiveSelectionResult_Pending: + OSL_FAIL( "PropertyComposer::onInteractivePropertySelection: no chance to forward the new value to the other handlers!" ); + // This means that we cannot know the new property value, which either has already been set + // at the first component ("Success"), or will be set later on once the asynchronous input + // is finished ("Pending"). So, we also cannot forward this new property value to the other + // handlers. + // We would need to be a listener at the property at the first component, but even this wouldn't + // be sufficient, since the property handler is free to change *any* property during a dedicated + // property UI. + eResult = InteractiveSelectionResult_Cancelled; + break; + + case InteractiveSelectionResult_ObtainedValue: + // OK. Our own caller will pass this as setPropertyValue, and we will then pass it to + // all slave handlers + break; + + default: + OSL_FAIL( "OPropertyBrowserController::onInteractivePropertySelection: unknown result value!" ); + break; + } + + return eResult; + } + + + void PropertyComposer::impl_ensureUIRequestComposer( const Reference< XObjectInspectorUI >& _rxInspectorUI ) + { + OSL_ENSURE(!m_pUIRequestComposer + || m_pUIRequestComposer->getDelegatorUI().get() == _rxInspectorUI.get(), + "PropertyComposer::impl_ensureUIRequestComposer: somebody's changing the horse " + "in the mid of the race!"); + + if (!m_pUIRequestComposer) + m_pUIRequestComposer.reset( new ComposedPropertyUIUpdate( _rxInspectorUI, this ) ); + } + + + void SAL_CALL PropertyComposer::actuatingPropertyChanged( const OUString& _rActuatingPropertyName, const Any& _rNewValue, const Any& _rOldValue, const Reference< XObjectInspectorUI >& _rxInspectorUI, sal_Bool _bFirstTimeInit ) + { + if ( !_rxInspectorUI.is() ) + throw NullPointerException(); + + MethodGuard aGuard( *this ); + + impl_ensureUIRequestComposer( _rxInspectorUI ); + ComposedUIAutoFireGuard aAutoFireGuard( *m_pUIRequestComposer ); + + // ask all handlers which expressed interest in this particular property, and "compose" their + // commands for the UIUpdater + for (auto const& slaveHandler : m_aSlaveHandlers) + { + // TODO: make this cheaper (cache it?) + const StlSyntaxSequence< OUString > aThisHandlersActuatingProps( slaveHandler->getActuatingProperties() ); + for (const auto & aThisHandlersActuatingProp : aThisHandlersActuatingProps) + { + if ( aThisHandlersActuatingProp == _rActuatingPropertyName ) + { + slaveHandler->actuatingPropertyChanged( _rActuatingPropertyName, _rNewValue, _rOldValue, + m_pUIRequestComposer->getUIForPropertyHandler(slaveHandler), + _bFirstTimeInit ); + break; + } + } + } + } + + + IMPLEMENT_FORWARD_XCOMPONENT( PropertyComposer, PropertyComposer_Base ) + + + void SAL_CALL PropertyComposer::disposing() + { + MethodGuard aGuard( *this ); + + // dispose our slave handlers + for (auto const& slaveHandler : m_aSlaveHandlers) + { + slaveHandler->removePropertyChangeListener( this ); + slaveHandler->dispose(); + } + + clearContainer( m_aSlaveHandlers ); + + if (m_pUIRequestComposer) + m_pUIRequestComposer->dispose(); + m_pUIRequestComposer.reset(); + } + + + void SAL_CALL PropertyComposer::propertyChange( const PropertyChangeEvent& evt ) + { + if ( !impl_isSupportedProperty_nothrow( evt.PropertyName ) ) + // A slave handler might fire events for more properties than we support. Ignore those. + return; + + PropertyChangeEvent aTranslatedEvent( evt ); + try + { + aTranslatedEvent.NewValue = getPropertyValue( evt.PropertyName ); + } + catch( const Exception& ) + { + DBG_UNHANDLED_EXCEPTION("extensions.propctrlr"); + } + m_aPropertyListeners.notifyEach( &XPropertyChangeListener::propertyChange, aTranslatedEvent ); + } + + + void SAL_CALL PropertyComposer::disposing( const EventObject& Source ) + { + MethodGuard aGuard( *this ); + m_aPropertyListeners.disposeAndClear( Source ); + } + + + sal_Bool SAL_CALL PropertyComposer::suspend( sal_Bool _bSuspend ) + { + MethodGuard aGuard( *this ); + for ( PropertyComposer::HandlerArray::const_iterator loop = m_aSlaveHandlers.begin(); + loop != m_aSlaveHandlers.end(); + ++loop + ) + { + if ( !(*loop)->suspend( _bSuspend ) ) + { + if ( _bSuspend && ( loop != m_aSlaveHandlers.begin() ) ) + { + // if we tried to suspend, but one of the slave handlers vetoed, + // re-activate the handlers which actually did *not* veto + // the suspension + do + { + --loop; + (*loop)->suspend( false ); + } + while ( loop != m_aSlaveHandlers.begin() ); + } + return false; + } + } + return true; + } + + + bool PropertyComposer::hasPropertyByName( const OUString& _rName ) + { + return impl_isSupportedProperty_nothrow( _rName ); + } + + +} // namespace pcr + + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |