extensions/source/propctrlr/propertycomposer.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 "propertycomposer.hxx"
  21
  22 #include <com/sun/star/lang/NullPointerException.hpp>
  23 #include <com/sun/star/lang/IllegalArgumentException.hpp>
  24 #include <comphelper/sequence.hxx>
  25 #include <osl/diagnose.h>
  26 #include <tools/diagnose_ex.h>
  27
  28 #include <algorithm>
  29 #include <iterator>
  30 #include <map>
  31
  32
  33 namespace pcr
  34 {
  35
  36
  37     using namespace ::com::sun::star::uno;
  38     using namespace ::com::sun::star::beans;
  39     using namespace ::com::sun::star::lang;
  40     using namespace ::com::sun::star::inspection;
  41
  42
  43     //= helper
  44
  45     namespace
  46     {
  47
  48         struct SetPropertyValue
  49         {
  50             OUString sPropertyName;
  51             const Any&      rValue;
  52             SetPropertyValue( const OUString& _rPropertyName, const Any& _rValue ) : sPropertyName( _rPropertyName ), rValue( _rValue ) { }
  53             void operator()( const Reference< XPropertyHandler >& _rHandler )
  54             {
  55                 _rHandler->setPropertyValue( sPropertyName, rValue );
  56             }
  57         };
  58
  59
  60         template < class BagType >
  61         void putIntoBag( const Sequence< typename BagType::value_type >& _rArray, BagType& /* [out] */ _rBag )
  62         {
  63             std::copy( _rArray.begin(), _rArray.end(),
  64                          std::insert_iterator< BagType >( _rBag, _rBag.begin() ) );
  65         }
  66
  67
  68         template < class BagType >
  69         void copyBagToArray( const BagType& /* [out] */ _rBag, Sequence< typename BagType::value_type >& _rArray )
  70         {
  71             _rArray.realloc( _rBag.size() );
  72             std::copy( _rBag.begin(), _rBag.end(), _rArray.getArray() );
  73         }
  74     }
  75
  76
  77     //= PropertyComposer
  78
  79
  80     // TODO: there are various places where we determine the first handler in our array which
  81     // supports a given property id. This is, at the moment, done with searching all handlers,
  82     // which is O( n * k ) at worst (n being the number of handlers, k being the maximum number
  83     // of supported properties per handler). Shouldn't we cache this? So that it is O( log k )?
  84
  85
  86     PropertyComposer::PropertyComposer( const std::vector< Reference< XPropertyHandler > >& _rSlaveHandlers )
  87         :PropertyComposer_Base          ( m_aMutex          )
  88         ,m_aSlaveHandlers               ( _rSlaveHandlers   )
  89         ,m_aPropertyListeners           ( m_aMutex          )
  90         ,m_bSupportedPropertiesAreKnown ( false             )
  91     {
  92         if ( m_aSlaveHandlers.empty() )
  93             throw IllegalArgumentException();
  94
  95         osl_atomic_increment( &m_refCount );
  96         {
  97             Reference< XPropertyChangeListener > xMeMyselfAndI( this );
  98             for (auto const& slaveHandler : m_aSlaveHandlers)
  99             {
 100                 if ( !slaveHandler.is() )
 101                     throw NullPointerException();
 102                 slaveHandler->addPropertyChangeListener( xMeMyselfAndI );
 103             }
 104         }
 105         osl_atomic_decrement( &m_refCount );
 106     }
 107
 108
 109     void SAL_CALL PropertyComposer::inspect( const Reference< XInterface >& _rxIntrospectee )
 110     {
 111         MethodGuard aGuard( *this );
 112
 113         for (auto const& slaveHandler : m_aSlaveHandlers)
 114         {
 115             slaveHandler->inspect( _rxIntrospectee );
 116         }
 117     }
 118
 119
 120     Any SAL_CALL PropertyComposer::getPropertyValue( const OUString& _rPropertyName )
 121     {
 122         MethodGuard aGuard( *this );
 123         return m_aSlaveHandlers[0]->getPropertyValue( _rPropertyName );
 124     }
 125
 126
 127     void SAL_CALL PropertyComposer::setPropertyValue( const OUString& _rPropertyName, const Any& _rValue )
 128     {
 129         MethodGuard aGuard( *this );
 130         std::for_each( m_aSlaveHandlers.begin(), m_aSlaveHandlers.end(), SetPropertyValue( _rPropertyName, _rValue ) );
 131     }
 132
 133
 134     Any SAL_CALL PropertyComposer::convertToPropertyValue( const OUString& _rPropertyName, const Any& _rControlValue )
 135     {
 136         MethodGuard aGuard( *this );
 137         return m_aSlaveHandlers[0]->convertToPropertyValue( _rPropertyName, _rControlValue );
 138     }
 139
 140
 141     Any SAL_CALL PropertyComposer::convertToControlValue( const OUString& _rPropertyName, const Any& _rPropertyValue, const Type& _rControlValueType )
 142     {
 143         MethodGuard aGuard( *this );
 144         return m_aSlaveHandlers[0]->convertToControlValue( _rPropertyName, _rPropertyValue, _rControlValueType );
 145     }
 146
 147
 148     PropertyState SAL_CALL PropertyComposer::getPropertyState( const OUString& _rPropertyName )
 149     {
 150         MethodGuard aGuard( *this );
 151
 152         // assume DIRECT for the moment. This will stay this way if *all* slaves
 153         // tell the property has DIRECT state, and if *all* values equal
 154         PropertyState eState = PropertyState_DIRECT_VALUE;
 155
 156         // check the master state
 157         Reference< XPropertyHandler > xPrimary( *m_aSlaveHandlers.begin() );
 158         Any aPrimaryValue = xPrimary->getPropertyValue( _rPropertyName );
 159         eState = xPrimary->getPropertyState( _rPropertyName );
 160
 161         // loop through the secondary sets
 162         PropertyState eSecondaryState = PropertyState_DIRECT_VALUE;
 163         for ( HandlerArray::const_iterator loop = m_aSlaveHandlers.begin() + 1;
 164               loop != m_aSlaveHandlers.end();
 165               ++loop
 166             )
 167         {
 168             // the secondary state
 169             eSecondaryState = (*loop)->getPropertyState( _rPropertyName );
 170
 171             // the secondary value
 172             Any aSecondaryValue( (*loop)->getPropertyValue( _rPropertyName ) );
 173
 174             if  (   ( PropertyState_AMBIGUOUS_VALUE == eSecondaryState )    // secondary is ambiguous
 175                 ||  ( aPrimaryValue != aSecondaryValue )                    // unequal values
 176                 )
 177             {
 178                 eState = PropertyState_AMBIGUOUS_VALUE;
 179                 break;
 180             }
 181         }
 182
 183         return eState;
 184     }
 185
 186
 187     void SAL_CALL PropertyComposer::addPropertyChangeListener( const Reference< XPropertyChangeListener >& _rxListener )
 188     {
 189         MethodGuard aGuard( *this );
 190         m_aPropertyListeners.addListener( _rxListener );
 191     }
 192
 193
 194     void SAL_CALL PropertyComposer::removePropertyChangeListener( const Reference< XPropertyChangeListener >& _rxListener )
 195     {
 196         MethodGuard aGuard( *this );
 197         m_aPropertyListeners.removeListener( _rxListener );
 198     }
 199
 200
 201     Sequence< Property > SAL_CALL PropertyComposer::getSupportedProperties()
 202     {
 203         MethodGuard aGuard( *this );
 204
 205         if ( !m_bSupportedPropertiesAreKnown )
 206         {
 207             // we support a property if and only if all of our slaves support it
 208
 209             // initially, use all the properties of an arbitrary handler (we take the first one)
 210             putIntoBag( (*m_aSlaveHandlers.begin())->getSupportedProperties(), m_aSupportedProperties );
 211
 212             // now intersect with the properties of *all* other handlers
 213             for ( HandlerArray::const_iterator loop = m_aSlaveHandlers.begin() + 1;
 214                 loop != m_aSlaveHandlers.end();
 215                 ++loop
 216                 )
 217             {
 218                 // the properties supported by the current handler
 219                 PropertyBag aThisRound;
 220                 putIntoBag( (*loop)->getSupportedProperties(), aThisRound );
 221
 222                 // the intersection of those properties with all we already have
 223                 PropertyBag aIntersection;
 224                 std::set_intersection( aThisRound.begin(), aThisRound.end(), m_aSupportedProperties.begin(), m_aSupportedProperties.end(),
 225                     std::insert_iterator< PropertyBag >( aIntersection, aIntersection.begin() ), PropertyLessByName() );
 226
 227                 m_aSupportedProperties.swap( aIntersection );
 228                 if ( m_aSupportedProperties.empty() )
 229                     break;
 230             }
 231
 232             // remove those properties which are not composable
 233             for (   PropertyBag::iterator check = m_aSupportedProperties.begin();
 234                     check != m_aSupportedProperties.end();
 235                 )
 236             {
 237                 bool bIsComposable = isComposable( check->Name );
 238                 if ( !bIsComposable )
 239                 {
 240                     check = m_aSupportedProperties.erase( check );
 241                 }
 242                 else
 243                     ++check;
 244             }
 245
 246             m_bSupportedPropertiesAreKnown = true;
 247         }
 248
 249         return comphelper::containerToSequence( m_aSupportedProperties );
 250     }
 251
 252
 253     static void uniteStringArrays( const PropertyComposer::HandlerArray& _rHandlers, Sequence< OUString > (SAL_CALL XPropertyHandler::*pGetter)( ),
 254         Sequence< OUString >& /* [out] */ _rUnion )
 255     {
 256         std::set< OUString > aUnitedBag;
 257
 258         Sequence< OUString > aThisRound;
 259         for (auto const& handler : _rHandlers)
 260         {
 261             aThisRound = (handler.get()->*pGetter)();
 262             putIntoBag( aThisRound, aUnitedBag );
 263         }
 264
 265         copyBagToArray( aUnitedBag, _rUnion );
 266     }
 267
 268
 269     Sequence< OUString > SAL_CALL PropertyComposer::getSupersededProperties( )
 270     {
 271         MethodGuard aGuard( *this );
 272
 273         // we supersede those properties which are superseded by at least one of our slaves
 274         Sequence< OUString > aSuperseded;
 275         uniteStringArrays( m_aSlaveHandlers, &XPropertyHandler::getSupersededProperties, aSuperseded );
 276         return aSuperseded;
 277     }
 278
 279
 280     Sequence< OUString > SAL_CALL PropertyComposer::getActuatingProperties( )
 281     {
 282         MethodGuard aGuard( *this );
 283
 284         // we're interested in those properties which at least one handler wants to have
 285         Sequence< OUString > aActuating;
 286         uniteStringArrays( m_aSlaveHandlers, &XPropertyHandler::getActuatingProperties, aActuating );
 287         return aActuating;
 288     }
 289
 290
 291     LineDescriptor SAL_CALL PropertyComposer::describePropertyLine( const OUString& _rPropertyName,
 292         const Reference< XPropertyControlFactory >& _rxControlFactory )
 293     {
 294         MethodGuard aGuard( *this );
 295         return m_aSlaveHandlers[0]->describePropertyLine( _rPropertyName, _rxControlFactory );
 296     }
 297
 298
 299     sal_Bool SAL_CALL PropertyComposer::isComposable( const OUString& _rPropertyName )
 300     {
 301         MethodGuard aGuard( *this );
 302         return m_aSlaveHandlers[0]->isComposable( _rPropertyName );
 303     }
 304
 305
 306     InteractiveSelectionResult SAL_CALL PropertyComposer::onInteractivePropertySelection( const OUString& _rPropertyName, sal_Bool _bPrimary, Any& _rData, const Reference< XObjectInspectorUI >& _rxInspectorUI )
 307     {
 308         if ( !_rxInspectorUI.is() )
 309             throw NullPointerException();
 310
 311         MethodGuard aGuard( *this );
 312
 313         impl_ensureUIRequestComposer( _rxInspectorUI );
 314         ComposedUIAutoFireGuard aAutoFireGuard( *m_pUIRequestComposer );
 315
 316         // ask the first of the handlers
 317         InteractiveSelectionResult eResult = (*m_aSlaveHandlers.begin())->onInteractivePropertySelection(
 318                 _rPropertyName,
 319                 _bPrimary,
 320                 _rData,
 321                 m_pUIRequestComposer->getUIForPropertyHandler( *m_aSlaveHandlers.begin() )
 322             );
 323
 324         switch ( eResult )
 325         {
 326         case InteractiveSelectionResult_Cancelled:
 327             // fine
 328             break;
 329
 330         case InteractiveSelectionResult_Success:
 331         case InteractiveSelectionResult_Pending:
 332             OSL_FAIL( "PropertyComposer::onInteractivePropertySelection: no chance to forward the new value to the other handlers!" );
 333             // This means that we cannot know the new property value, which either has already been set
 334             // at the first component ("Success"), or will be set later on once the asynchronous input
 335             // is finished ("Pending"). So, we also cannot forward this new property value to the other
 336             // handlers.
 337             // We would need to be a listener at the property at the first component, but even this wouldn't
 338             // be sufficient, since the property handler is free to change *any* property during a dedicated
 339             // property UI.
 340             eResult = InteractiveSelectionResult_Cancelled;
 341             break;
 342
 343         case InteractiveSelectionResult_ObtainedValue:
 344             // OK. Our own caller will pass this as setPropertyValue, and we will then pass it to
 345             // all slave handlers
 346             break;
 347
 348         default:
 349             OSL_FAIL( "OPropertyBrowserController::onInteractivePropertySelection: unknown result value!" );
 350             break;
 351         }
 352
 353         return eResult;
 354     }
 355
 356
 357     void PropertyComposer::impl_ensureUIRequestComposer( const Reference< XObjectInspectorUI >& _rxInspectorUI )
 358     {
 359         OSL_ENSURE(!m_pUIRequestComposer
 360                        || m_pUIRequestComposer->getDelegatorUI().get() == _rxInspectorUI.get(),
 361                    "PropertyComposer::impl_ensureUIRequestComposer: somebody's changing the horse "
 362                    "in the mid of the race!");
 363
 364         if (!m_pUIRequestComposer)
 365             m_pUIRequestComposer.reset( new ComposedPropertyUIUpdate( _rxInspectorUI, this ) );
 366     }
 367
 368
 369     void SAL_CALL PropertyComposer::actuatingPropertyChanged( const OUString& _rActuatingPropertyName, const Any& _rNewValue, const Any& _rOldValue, const Reference< XObjectInspectorUI >& _rxInspectorUI, sal_Bool _bFirstTimeInit )
 370     {
 371         if ( !_rxInspectorUI.is() )
 372             throw NullPointerException();
 373
 374         MethodGuard aGuard( *this );
 375
 376         impl_ensureUIRequestComposer( _rxInspectorUI );
 377         ComposedUIAutoFireGuard aAutoFireGuard( *m_pUIRequestComposer );
 378
 379         // ask all handlers which expressed interest in this particular property, and "compose" their
 380         // commands for the UIUpdater
 381         for (auto const& slaveHandler : m_aSlaveHandlers)
 382         {
 383             // TODO: make this cheaper (cache it?)
 384             const StlSyntaxSequence< OUString > aThisHandlersActuatingProps( slaveHandler->getActuatingProperties() );
 385             for (const auto & aThisHandlersActuatingProp : aThisHandlersActuatingProps)
 386             {
 387                 if ( aThisHandlersActuatingProp == _rActuatingPropertyName )
 388                 {
 389                     slaveHandler->actuatingPropertyChanged( _rActuatingPropertyName, _rNewValue, _rOldValue,
 390                         m_pUIRequestComposer->getUIForPropertyHandler(slaveHandler),
 391                         _bFirstTimeInit );
 392                     break;
 393                 }
 394             }
 395         }
 396     }
 397
 398
 399     IMPLEMENT_FORWARD_XCOMPONENT( PropertyComposer, PropertyComposer_Base )
 400
 401
 402     void SAL_CALL PropertyComposer::disposing()
 403     {
 404         MethodGuard aGuard( *this );
 405
 406         // dispose our slave handlers
 407         for (auto const& slaveHandler : m_aSlaveHandlers)
 408         {
 409             slaveHandler->removePropertyChangeListener( this );
 410             slaveHandler->dispose();
 411         }
 412
 413         clearContainer( m_aSlaveHandlers );
 414
 415         if (m_pUIRequestComposer)
 416             m_pUIRequestComposer->dispose();
 417         m_pUIRequestComposer.reset();
 418     }
 419
 420
 421     void SAL_CALL PropertyComposer::propertyChange( const PropertyChangeEvent& evt )
 422     {
 423         if ( !impl_isSupportedProperty_nothrow( evt.PropertyName ) )
 424             // A slave handler might fire events for more properties than we support. Ignore those.
 425             return;
 426
 427         PropertyChangeEvent aTranslatedEvent( evt );
 428         try
 429         {
 430             aTranslatedEvent.NewValue = getPropertyValue( evt.PropertyName );
 431         }
 432         catch( const Exception& )
 433         {
 434             DBG_UNHANDLED_EXCEPTION("extensions.propctrlr");
 435         }
 436         m_aPropertyListeners.notify( aTranslatedEvent, &XPropertyChangeListener::propertyChange );
 437     }
 438
 439
 440     void SAL_CALL PropertyComposer::disposing( const EventObject& Source )
 441     {
 442         MethodGuard aGuard( *this );
 443         m_aPropertyListeners.disposing( Source );
 444     }
 445
 446
 447     sal_Bool SAL_CALL PropertyComposer::suspend( sal_Bool _bSuspend )
 448     {
 449         MethodGuard aGuard( *this );
 450         for ( PropertyComposer::HandlerArray::const_iterator loop = m_aSlaveHandlers.begin();
 451               loop != m_aSlaveHandlers.end();
 452               ++loop
 453             )
 454         {
 455             if ( !(*loop)->suspend( _bSuspend ) )
 456             {
 457                 if ( _bSuspend && ( loop != m_aSlaveHandlers.begin() ) )
 458                 {
 459                     // if we tried to suspend, but one of the slave handlers vetoed,
 460                     // re-activate the handlers which actually did *not* veto
 461                     // the suspension
 462                     do
 463                     {
 464                         --loop;
 465                         (*loop)->suspend( false );
 466                     }
 467                     while ( loop != m_aSlaveHandlers.begin() );
 468                 }
 469                 return false;
 470             }
 471         }
 472         return true;
 473     }
 474
 475
 476     bool PropertyComposer::hasPropertyByName( const OUString& _rName )
 477     {
 478         return impl_isSupportedProperty_nothrow( _rName );
 479     }
 480
 481
 482 } // namespace pcr
 483
 484
 485 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */