dali-toolkit/internal/controls/text-controls/text-field-impl.cpp

   1 /*
   2  * Copyright (c) 2015 Samsung Electronics Co., Ltd.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  *
  16  */
  17
  18 // CLASS HEADER
  19 #include <dali-toolkit/internal/controls/text-controls/text-field-impl.h>
  20
  21 // EXTERNAL INCLUDES
  22 #include <string>
  23 #include <dali/public-api/adaptor-framework/key.h>
  24 #include <dali/public-api/common/stage.h>
  25 #include <dali/public-api/images/resource-image.h>
  26 #include <dali/public-api/object/type-registry.h>
  27 #include <dali/public-api/object/type-registry-helper.h>
  28 #include <dali/public-api/scripting/scripting.h>
  29 #include <dali/integration-api/debug.h>
  30 #include <dali/public-api/adaptor-framework/virtual-keyboard.h>
  31
  32 // INTERNAL INCLUDES
  33 #include <dali-toolkit/public-api/text/rendering-backend.h>
  34 #include <dali-toolkit/internal/text/layouts/layout-engine.h>
  35 #include <dali-toolkit/internal/text/rendering/text-backend.h>
  36 #include <dali-toolkit/internal/styling/style-manager-impl.h>
  37
  38 using namespace Dali::Toolkit::Text;
  39
  40 namespace Dali
  41 {
  42
  43 namespace Toolkit
  44 {
  45
  46 namespace Internal
  47 {
  48
  49 namespace
  50 {
  51   const unsigned int DEFAULT_RENDERING_BACKEND = Dali::Toolkit::Text::DEFAULT_RENDERING_BACKEND;
  52 }
  53
  54 namespace
  55 {
  56
  57 const Scripting::StringEnum< Toolkit::Text::LayoutEngine::HorizontalAlignment > HORIZONTAL_ALIGNMENT_STRING_TABLE[] =
  58 {
  59   { "BEGIN",  Toolkit::Text::LayoutEngine::HORIZONTAL_ALIGN_BEGIN  },
  60   { "CENTER", Toolkit::Text::LayoutEngine::HORIZONTAL_ALIGN_CENTER },
  61   { "END",    Toolkit::Text::LayoutEngine::HORIZONTAL_ALIGN_END    },
  62 };
  63 const unsigned int HORIZONTAL_ALIGNMENT_STRING_TABLE_COUNT = sizeof( HORIZONTAL_ALIGNMENT_STRING_TABLE ) / sizeof( HORIZONTAL_ALIGNMENT_STRING_TABLE[0] );
  64
  65 const Scripting::StringEnum< Toolkit::Text::LayoutEngine::VerticalAlignment > VERTICAL_ALIGNMENT_STRING_TABLE[] =
  66 {
  67   { "TOP",    Toolkit::Text::LayoutEngine::VERTICAL_ALIGN_TOP    },
  68   { "CENTER", Toolkit::Text::LayoutEngine::VERTICAL_ALIGN_CENTER },
  69   { "BOTTOM", Toolkit::Text::LayoutEngine::VERTICAL_ALIGN_BOTTOM },
  70 };
  71 const unsigned int VERTICAL_ALIGNMENT_STRING_TABLE_COUNT = sizeof( VERTICAL_ALIGNMENT_STRING_TABLE ) / sizeof( VERTICAL_ALIGNMENT_STRING_TABLE[0] );
  72
  73 // Type registration
  74 BaseHandle Create()
  75 {
  76   return Toolkit::TextField::New();
  77 }
  78
  79 // Setup properties, signals and actions using the type-registry.
  80 DALI_TYPE_REGISTRATION_BEGIN( Toolkit::TextField, Toolkit::Control, Create );
  81
  82 DALI_PROPERTY_REGISTRATION( TextField, "rendering-backend",       INTEGER,   RENDERING_BACKEND       )
  83 DALI_PROPERTY_REGISTRATION( TextField, "placeholder-text",        STRING,    PLACEHOLDER_TEXT        )
  84 DALI_PROPERTY_REGISTRATION( TextField, "text",                    STRING,    TEXT                    )
  85 DALI_PROPERTY_REGISTRATION( TextField, "font-family",             STRING,    FONT_FAMILY             )
  86 DALI_PROPERTY_REGISTRATION( TextField, "font-style",              STRING,    FONT_STYLE              )
  87 DALI_PROPERTY_REGISTRATION( TextField, "point-size",              FLOAT,     POINT_SIZE              )
  88 DALI_PROPERTY_REGISTRATION( TextField, "exceed-policy",           INTEGER,   EXCEED_POLICY           )
  89 DALI_PROPERTY_REGISTRATION( TextField, "primary-cursor-color",    VECTOR4,   PRIMARY_CURSOR_COLOR    )
  90 DALI_PROPERTY_REGISTRATION( TextField, "secondary-cursor-color",  VECTOR4,   SECONDARY_CURSOR_COLOR  )
  91 DALI_PROPERTY_REGISTRATION( TextField, "enable-cursor-blink",     BOOLEAN,   ENABLE_CURSOR_BLINK     )
  92 DALI_PROPERTY_REGISTRATION( TextField, "cursor-blink-interval",   FLOAT,     CURSOR_BLINK_INTERVAL   )
  93 DALI_PROPERTY_REGISTRATION( TextField, "cursor-blink-duration",   FLOAT,     CURSOR_BLINK_DURATION   )
  94 DALI_PROPERTY_REGISTRATION( TextField, "grab-handle-image",       STRING,    GRAB_HANDLE_IMAGE       )
  95 DALI_PROPERTY_REGISTRATION( TextField, "decoration-bounding-box", RECTANGLE, DECORATION_BOUNDING_BOX )
  96 DALI_PROPERTY_REGISTRATION( TextField, "horizontal-alignment",    STRING,    HORIZONTAL_ALIGNMENT    )
  97 DALI_PROPERTY_REGISTRATION( TextField, "vertical-alignment",      STRING,    VERTICAL_ALIGNMENT      )
  98 DALI_TYPE_REGISTRATION_END()
  99
 100 } // namespace
 101
 102 Toolkit::TextField TextField::New()
 103 {
 104   // Create the implementation, temporarily owned by this handle on stack
 105   IntrusivePtr< TextField > impl = new TextField();
 106
 107   // Pass ownership to CustomActor handle
 108   Toolkit::TextField handle( *impl );
 109
 110   // Second-phase init of the implementation
 111   // This can only be done after the CustomActor connection has been made...
 112   impl->Initialize();
 113
 114   return handle;
 115 }
 116
 117 void TextField::SetProperty( BaseObject* object, Property::Index index, const Property::Value& value )
 118 {
 119   Toolkit::TextField textField = Toolkit::TextField::DownCast( Dali::BaseHandle( object ) );
 120
 121   if( textField )
 122   {
 123     TextField& impl( GetImpl( textField ) );
 124
 125     switch( index )
 126     {
 127       case Toolkit::TextField::Property::RENDERING_BACKEND:
 128       {
 129         int backend = value.Get< int >();
 130
 131         if( impl.mRenderingBackend != backend )
 132         {
 133           impl.mRenderingBackend = backend;
 134           impl.mRenderer.Reset();
 135         }
 136         break;
 137       }
 138       case Toolkit::TextField::Property::PLACEHOLDER_TEXT:
 139       {
 140         if( impl.mController )
 141         {
 142           //impl.mController->SetPlaceholderText( value.Get< std::string >() ); TODO
 143         }
 144         break;
 145       }
 146       case Toolkit::TextField::Property::TEXT:
 147       {
 148         if( impl.mController )
 149         {
 150           impl.mController->SetText( value.Get< std::string >() );
 151         }
 152         break;
 153       }
 154       case Toolkit::TextField::Property::FONT_FAMILY:
 155       {
 156         if( impl.mController )
 157         {
 158           std::string fontFamily = value.Get< std::string >();
 159
 160           if( impl.mController->GetDefaultFontFamily() != fontFamily )
 161           {
 162             impl.mController->SetDefaultFontFamily( fontFamily );
 163             impl.RequestTextRelayout();
 164           }
 165         }
 166         break;
 167       }
 168       case Toolkit::TextField::Property::FONT_STYLE:
 169       {
 170         if( impl.mController )
 171         {
 172           std::string fontStyle = value.Get< std::string >();
 173
 174           if( impl.mController->GetDefaultFontStyle() != fontStyle )
 175           {
 176             impl.mController->SetDefaultFontStyle( fontStyle );
 177             impl.RequestTextRelayout();
 178           }
 179         }
 180         break;
 181       }
 182       case Toolkit::TextField::Property::POINT_SIZE:
 183       {
 184         if( impl.mController )
 185         {
 186           float pointSize = value.Get< float >();
 187
 188           if( impl.mController->GetDefaultPointSize() != pointSize /*TODO - epsilon*/ )
 189           {
 190             impl.mController->SetDefaultPointSize( pointSize );
 191             impl.RequestTextRelayout();
 192           }
 193         }
 194         break;
 195       }
 196       case Toolkit::TextField::Property::EXCEED_POLICY:
 197       {
 198         impl.mExceedPolicy = value.Get< int >();
 199         break;
 200       }
 201       case Toolkit::TextField::Property::PRIMARY_CURSOR_COLOR:
 202       {
 203         if( impl.mDecorator )
 204         {
 205           impl.mDecorator->SetColor( PRIMARY_CURSOR, value.Get< Vector4 >() );
 206         }
 207         break;
 208       }
 209       case Toolkit::TextField::Property::SECONDARY_CURSOR_COLOR:
 210       {
 211         if( impl.mDecorator )
 212         {
 213           impl.mDecorator->SetColor( SECONDARY_CURSOR, value.Get< Vector4 >() );
 214         }
 215         break;
 216       }
 217       case Toolkit::TextField::Property::ENABLE_CURSOR_BLINK:
 218       {
 219         if( impl.mController )
 220         {
 221           impl.mController->SetEnableCursorBlink( value.Get< bool >() );
 222         }
 223         break;
 224       }
 225       case Toolkit::TextField::Property::CURSOR_BLINK_INTERVAL:
 226       {
 227         if( impl.mDecorator )
 228         {
 229           impl.mDecorator->SetCursorBlinkInterval( value.Get< float >() );
 230         }
 231         break;
 232       }
 233       case Toolkit::TextField::Property::CURSOR_BLINK_DURATION:
 234       {
 235         if( impl.mDecorator )
 236         {
 237           impl.mDecorator->SetCursorBlinkDuration( value.Get< float >() );
 238         }
 239         break;
 240       }
 241       case Toolkit::TextField::Property::GRAB_HANDLE_IMAGE:
 242       {
 243         ResourceImage image = ResourceImage::New( value.Get< std::string >() );
 244
 245         if( impl.mDecorator )
 246         {
 247           impl.mDecorator->SetGrabHandleImage( image );
 248         }
 249         break;
 250       }
 251       case Toolkit::TextField::Property::DECORATION_BOUNDING_BOX:
 252       {
 253         if( impl.mDecorator )
 254         {
 255           impl.mDecorator->SetBoundingBox( value.Get< Rect<int> >() );
 256         }
 257         break;
 258       }
 259       case Toolkit::TextField::Property::HORIZONTAL_ALIGNMENT:
 260       {
 261         LayoutEngine& engine = impl.mController->GetLayoutEngine();
 262         const LayoutEngine::HorizontalAlignment alignment = Scripting::GetEnumeration< Toolkit::Text::LayoutEngine::HorizontalAlignment >( value.Get< std::string >().c_str(),
 263                                                                                                                                            HORIZONTAL_ALIGNMENT_STRING_TABLE,
 264                                                                                                                                            HORIZONTAL_ALIGNMENT_STRING_TABLE_COUNT );
 265
 266         if( engine.GetHorizontalAlignment() != alignment )
 267         {
 268           engine.SetHorizontalAlignment( alignment );
 269           impl.RequestTextRelayout();
 270         }
 271         break;
 272       }
 273       case Toolkit::TextField::Property::VERTICAL_ALIGNMENT:
 274       {
 275         LayoutEngine& engine = impl.mController->GetLayoutEngine();
 276         const LayoutEngine::VerticalAlignment alignment = Scripting::GetEnumeration< Toolkit::Text::LayoutEngine::VerticalAlignment >( value.Get< std::string >().c_str(),
 277                                                                                                                                        VERTICAL_ALIGNMENT_STRING_TABLE,
 278                                                                                                                                        VERTICAL_ALIGNMENT_STRING_TABLE_COUNT );
 279
 280         if( engine.GetVerticalAlignment() != alignment )
 281         {
 282           engine.SetVerticalAlignment( alignment );
 283           impl.RequestTextRelayout();
 284         }
 285         break;
 286       }
 287     } // switch
 288   } // textfield
 289 }
 290
 291 Property::Value TextField::GetProperty( BaseObject* object, Property::Index index )
 292 {
 293   Property::Value value;
 294
 295   Toolkit::TextField textField = Toolkit::TextField::DownCast( Dali::BaseHandle( object ) );
 296
 297   if( textField )
 298   {
 299     TextField& impl( GetImpl( textField ) );
 300
 301     switch( index )
 302     {
 303       case Toolkit::TextField::Property::RENDERING_BACKEND:
 304       {
 305         value = impl.mRenderingBackend;
 306         break;
 307       }
 308       case Toolkit::TextField::Property::PLACEHOLDER_TEXT:
 309       {
 310         if( impl.mController )
 311         {
 312           std::string text;
 313           impl.mController->GetPlaceholderText( text );
 314           value = text;
 315         }
 316         break;
 317       }
 318       case Toolkit::TextField::Property::TEXT:
 319       {
 320         if( impl.mController )
 321         {
 322           std::string text;
 323           impl.mController->GetText( text );
 324           value = text;
 325         }
 326         break;
 327       }
 328       case Toolkit::TextField::Property::EXCEED_POLICY:
 329       {
 330         value = impl.mExceedPolicy;
 331         break;
 332       }
 333       case Toolkit::TextField::Property::PRIMARY_CURSOR_COLOR:
 334       {
 335         if( impl.mDecorator )
 336         {
 337           value = impl.mDecorator->GetColor( PRIMARY_CURSOR );
 338         }
 339         break;
 340       }
 341       case Toolkit::TextField::Property::SECONDARY_CURSOR_COLOR:
 342       {
 343         if( impl.mDecorator )
 344         {
 345           value = impl.mDecorator->GetColor( SECONDARY_CURSOR );
 346         }
 347         break;
 348       }
 349       case Toolkit::TextField::Property::ENABLE_CURSOR_BLINK:
 350       {
 351         value = impl.mController->GetEnableCursorBlink();
 352         break;
 353       }
 354       case Toolkit::TextField::Property::CURSOR_BLINK_INTERVAL:
 355       {
 356         if( impl.mDecorator )
 357         {
 358           value = impl.mDecorator->GetCursorBlinkInterval();
 359         }
 360         break;
 361       }
 362       case Toolkit::TextField::Property::CURSOR_BLINK_DURATION:
 363       {
 364         if( impl.mDecorator )
 365         {
 366           value = impl.mDecorator->GetCursorBlinkDuration();
 367         }
 368         break;
 369       }
 370       case Toolkit::TextField::Property::DECORATION_BOUNDING_BOX:
 371       {
 372         if( impl.mDecorator )
 373         {
 374           value = impl.mDecorator->GetBoundingBox();
 375         }
 376         break;
 377       }
 378       case Toolkit::TextField::Property::HORIZONTAL_ALIGNMENT:
 379       {
 380         if( impl.mController )
 381         {
 382           value = std::string( Scripting::GetEnumerationName< Toolkit::Text::LayoutEngine::HorizontalAlignment >( impl.mController->GetLayoutEngine().GetHorizontalAlignment(),
 383                                                                                                                   HORIZONTAL_ALIGNMENT_STRING_TABLE,
 384                                                                                                                   HORIZONTAL_ALIGNMENT_STRING_TABLE_COUNT ) );
 385         }
 386         break;
 387       }
 388       case Toolkit::TextField::Property::VERTICAL_ALIGNMENT:
 389       {
 390         if( impl.mController )
 391         {
 392           value = std::string( Scripting::GetEnumerationName< Toolkit::Text::LayoutEngine::VerticalAlignment >( impl.mController->GetLayoutEngine().GetVerticalAlignment(),
 393                                                                                                                   VERTICAL_ALIGNMENT_STRING_TABLE,
 394                                                                                                                   VERTICAL_ALIGNMENT_STRING_TABLE_COUNT ) );
 395         }
 396         break;
 397       }
 398     } //switch
 399   }
 400
 401   return value;
 402 }
 403
 404 void TextField::OnInitialize()
 405 {
 406   mController = Text::Controller::New( *this );
 407
 408   mDecorator = Text::Decorator::New( *this, *mController );
 409
 410   mController->GetLayoutEngine().SetLayout( LayoutEngine::SINGLE_LINE_BOX );
 411
 412   mController->EnableTextInput( mDecorator );
 413
 414   // Forward input events to controller
 415   EnableGestureDetection(Gesture::Tap);
 416   GetTapGestureDetector().SetMaximumTapsRequired( 2 );
 417   EnableGestureDetection(Gesture::Pan);
 418
 419   // Set BoundingBox to stage size if not already set.
 420   if ( mDecorator->GetBoundingBox().IsEmpty() )
 421   {
 422     Vector2 stageSize = Dali::Stage::GetCurrent().GetSize();
 423     mDecorator->SetBoundingBox( Rect<int>( 0.0f, 0.0f, stageSize.width, stageSize.height ) );
 424   }
 425 }
 426
 427 void TextField::OnStyleChange( Toolkit::StyleManager styleManager, StyleChange change )
 428 {
 429   GetImpl( styleManager ).ApplyThemeStyle( Toolkit::Control( GetOwner() ) );
 430 }
 431
 432 Vector3 TextField::GetNaturalSize()
 433 {
 434   return mController->GetNaturalSize();
 435 }
 436
 437 float TextField::GetHeightForWidth( float width )
 438 {
 439   return mController->GetHeightForWidth( width );
 440 }
 441
 442 void TextField::OnRelayout( const Vector2& size, ActorSizeContainer& container )
 443 {
 444   if( mController->Relayout( size ) ||
 445       !mRenderer )
 446   {
 447     const Vector2& scrollPosition = mController->GetScrollPosition();
 448     const Vector2& alignmentOffset = mController->GetAlignmentOffset();
 449
 450     Vector2 offset = scrollPosition + alignmentOffset;
 451
 452     if( mDecorator )
 453     {
 454       mDecorator->Relayout( size, offset );
 455     }
 456
 457     if( !mRenderer )
 458     {
 459       mRenderer = Backend::Get().NewRenderer( mRenderingBackend );
 460     }
 461
 462     RenderableActor renderableActor;
 463     if( mRenderer )
 464     {
 465       renderableActor = mRenderer->Render( mController->GetView() );
 466     }
 467
 468     EnableClipping( (Dali::Toolkit::TextField::EXCEED_POLICY_CLIP == mExceedPolicy), size );
 469
 470     if( renderableActor != mRenderableActor )
 471     {
 472       UnparentAndReset( mRenderableActor );
 473       mRenderableActor = renderableActor;
 474     }
 475
 476     if( mRenderableActor )
 477     {
 478       mRenderableActor.SetPosition( offset.x, offset.y );
 479
 480       // Make sure the actor is parented correctly with/without clipping
 481       if( mClipper )
 482       {
 483         mClipper->GetRootActor().Add( mRenderableActor );
 484       }
 485       else
 486       {
 487         Self().Add( mRenderableActor );
 488       }
 489     }
 490   }
 491 }
 492
 493 void TextField::OnKeyInputFocusGained()
 494 {
 495   VirtualKeyboard::StatusChangedSignal().Connect( this, &TextField::KeyboardStatusChanged );
 496
 497   ImfManager imfManager = ImfManager::Get();
 498
 499   if ( imfManager )
 500   {
 501     imfManager.EventReceivedSignal().Connect( this, &TextField::OnImfEvent );
 502
 503     // Notify that the text editing start.
 504     imfManager.Activate();
 505
 506     // When window gain lost focus, the imf manager is deactivated. Thus when window gain focus again, the imf manager must be activated.
 507     imfManager.SetRestoreAfterFocusLost( true );
 508   }
 509
 510   mController->KeyboardFocusGainEvent();
 511 }
 512
 513 void TextField::OnKeyInputFocusLost()
 514 {
 515   VirtualKeyboard::StatusChangedSignal().Disconnect( this, &TextField::KeyboardStatusChanged );
 516
 517   ImfManager imfManager = ImfManager::Get();
 518   if ( imfManager )
 519   {
 520     // The text editing is finished. Therefore the imf manager don't have restore activation.
 521     imfManager.SetRestoreAfterFocusLost( false );
 522
 523     // Notify that the text editing finish.
 524     imfManager.Deactivate();
 525
 526     imfManager.EventReceivedSignal().Disconnect( this, &TextField::OnImfEvent );
 527   }
 528
 529   mController->KeyboardFocusLostEvent();
 530 }
 531
 532 void TextField::OnTap( const TapGesture& gesture )
 533 {
 534   // Show the keyboard if it was hidden.
 535   if (!VirtualKeyboard::IsVisible())
 536   {
 537     VirtualKeyboard::Show();
 538   }
 539
 540   SetKeyInputFocus();
 541
 542   mController->TapEvent( gesture.numberOfTaps, gesture.localPoint.x, gesture.localPoint.y );
 543 }
 544
 545 void TextField::OnPan( const PanGesture& gesture )
 546 {
 547   mController->PanEvent( gesture.state, gesture.displacement );
 548 }
 549
 550 bool TextField::OnKeyEvent( const KeyEvent& event )
 551 {
 552   if( Dali::DALI_KEY_ESCAPE == event.keyCode )
 553   {
 554     ClearKeyInputFocus();
 555   }
 556
 557   return mController->KeyEvent( event );
 558 }
 559
 560 ImfManager::ImfCallbackData TextField::OnImfEvent( Dali::ImfManager& imfManager, const ImfManager::ImfEventData& imfEvent )
 561 {
 562   switch ( imfEvent.eventName )
 563   {
 564     case ImfManager::COMMIT:
 565     {
 566       KeyEvent event( "", imfEvent.predictiveString, 0, 0, 0, KeyEvent::Down );
 567       mController->KeyEvent( event );
 568       break;
 569     }
 570     case ImfManager::PREEDIT: // fall through
 571     case ImfManager::DELETESURROUNDING:
 572     case ImfManager::GETSURROUNDING:
 573     case ImfManager::VOID:
 574     {
 575       // do nothing
 576     }
 577   } // end switch
 578
 579   return ImfManager::ImfCallbackData();
 580 }
 581
 582 void TextField::RequestTextRelayout()
 583 {
 584   RelayoutRequest();
 585 }
 586
 587 void TextField::EnableClipping( bool clipping, const Vector2& size )
 588 {
 589   if( clipping )
 590   {
 591     // Not worth to created clip actor if width or height is equal to zero.
 592     if( size.width > Math::MACHINE_EPSILON_1000 && size.height > Math::MACHINE_EPSILON_1000 )
 593     {
 594       if( !mClipper )
 595       {
 596         Actor self = Self();
 597
 598         mClipper = Clipper::New( size );
 599         self.Add( mClipper->GetRootActor() );
 600         self.Add( mClipper->GetImageActor() );
 601       }
 602       else if ( mClipper )
 603       {
 604         mClipper->Refresh( size );
 605       }
 606     }
 607   }
 608   else
 609   {
 610     // Note - this will automatically remove the root & image actors
 611     mClipper.Reset();
 612   }
 613 }
 614
 615 void TextField::KeyboardStatusChanged(bool keyboardShown)
 616 {
 617   // Just hide the grab handle when keyboard is hidden.
 618   if (!keyboardShown )
 619   {
 620     mController->KeyboardFocusLostEvent();
 621   }
 622 }
 623
 624 TextField::TextField()
 625 : Control( ControlBehaviour( REQUIRES_STYLE_CHANGE_SIGNALS ) ),
 626   mRenderingBackend( DEFAULT_RENDERING_BACKEND ),
 627   mExceedPolicy( Dali::Toolkit::TextField::EXCEED_POLICY_CLIP )
 628 {
 629 }
 630
 631 TextField::~TextField()
 632 {
 633   mClipper.Reset();
 634 }
 635
 636 } // namespace Internal
 637
 638 } // namespace Toolkit
 639
 640 } // namespace Dali