+++ /dev/null
-/*
- * Copyright (c) 2020 Samsung Electronics Co., Ltd.
- *
- * Licensed 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
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-// CLASS HEADER
-#include <dali-toolkit/internal/text/text-controller-relayouter.h>
-
-// EXTERNAL INCLUDES
-#include <limits>
-#include <dali/integration-api/debug.h>
-
-// INTERNAL INCLUDES
-#include <dali-toolkit/internal/text/layouts/layout-parameters.h>
-#include <dali-toolkit/internal/text/text-controller-impl.h>
-
-namespace
-{
-
-#if defined(DEBUG_ENABLED)
-Debug::Filter* gLogFilter = Debug::Filter::New(Debug::NoLogging, true, "LOG_TEXT_CONTROLS");
-#endif
-
-constexpr float MAX_FLOAT = std::numeric_limits<float>::max();
-
-float ConvertToEven( float value )
-{
- int intValue(static_cast<int>( value ));
- return static_cast<float>( intValue + ( intValue & 1 ) );
-}
-
-} // namespace
-
-namespace Dali
-{
-
-namespace Toolkit
-{
-
-namespace Text
-{
-
-Vector3 Controller::Relayouter::GetNaturalSize(Controller& controller)
-{
- DALI_LOG_INFO( gLogFilter, Debug::Verbose, "-->Controller::GetNaturalSize\n" );
- Vector3 naturalSize;
-
- // Make sure the model is up-to-date before layouting
- controller.ProcessModifyEvents();
-
- Controller::Impl& impl = *controller.mImpl;
- ModelPtr& model = impl.mModel;
- VisualModelPtr& visualModel = model->mVisualModel;
- if( impl.mRecalculateNaturalSize )
- {
- // Operations that can be done only once until the text changes.
- const OperationsMask onlyOnceOperations = static_cast<OperationsMask>( CONVERT_TO_UTF32 |
- GET_SCRIPTS |
- VALIDATE_FONTS |
- GET_LINE_BREAKS |
- BIDI_INFO |
- SHAPE_TEXT |
- GET_GLYPH_METRICS );
-
- // Set the update info to relayout the whole text.
- TextUpdateInfo& textUpdateInfo = impl.mTextUpdateInfo;
- textUpdateInfo.mParagraphCharacterIndex = 0u;
- textUpdateInfo.mRequestedNumberOfCharacters = model->mLogicalModel->mText.Count();
-
- // Make sure the model is up-to-date before layouting
- impl.UpdateModel( onlyOnceOperations );
-
- // Get a reference to the pending operations member
- OperationsMask& operationsPending = impl.mOperationsPending;
-
- // Layout the text for the new width.
- operationsPending = static_cast<OperationsMask>( operationsPending | LAYOUT | REORDER );
-
- // Store the actual control's size to restore later.
- const Size actualControlSize = visualModel->mControlSize;
-
- DoRelayout( controller,
- Size( MAX_FLOAT, MAX_FLOAT ),
- static_cast<OperationsMask>( onlyOnceOperations |
- LAYOUT | REORDER ),
- naturalSize.GetVectorXY() );
-
- // Do not do again the only once operations.
- operationsPending = static_cast<OperationsMask>( operationsPending & ~onlyOnceOperations );
-
- // Do the size related operations again.
- const OperationsMask sizeOperations = static_cast<OperationsMask>( LAYOUT |
- ALIGN |
- REORDER );
- operationsPending = static_cast<OperationsMask>( operationsPending | sizeOperations );
-
- // Stores the natural size to avoid recalculate it again
- // unless the text/style changes.
- visualModel->SetNaturalSize( naturalSize.GetVectorXY() );
-
- impl.mRecalculateNaturalSize = false;
-
- // Clear the update info. This info will be set the next time the text is updated.
- textUpdateInfo.Clear();
- textUpdateInfo.mClearAll = true;
-
- // Restore the actual control's size.
- visualModel->mControlSize = actualControlSize;
-
- DALI_LOG_INFO( gLogFilter, Debug::Verbose, "<--Controller::GetNaturalSize calculated %f,%f,%f\n", naturalSize.x, naturalSize.y, naturalSize.z );
- }
- else
- {
- naturalSize = visualModel->GetNaturalSize();
-
- DALI_LOG_INFO( gLogFilter, Debug::Verbose, "<--Controller::GetNaturalSize cached %f,%f,%f\n", naturalSize.x, naturalSize.y, naturalSize.z );
- }
-
- naturalSize.x = ConvertToEven( naturalSize.x );
- naturalSize.y = ConvertToEven( naturalSize.y );
-
- return naturalSize;
-}
-
-bool Controller::Relayouter::CheckForTextFit(Controller& controller, float pointSize, const Size& layoutSize)
-{
- Size textSize;
- Controller::Impl& impl = *controller.mImpl;
- TextUpdateInfo& textUpdateInfo = impl.mTextUpdateInfo;
- impl.mFontDefaults->mFitPointSize = pointSize;
- impl.mFontDefaults->sizeDefined = true;
- controller.ClearFontData();
-
- // Operations that can be done only once until the text changes.
- const OperationsMask onlyOnceOperations = static_cast<OperationsMask>( CONVERT_TO_UTF32 |
- GET_SCRIPTS |
- VALIDATE_FONTS |
- GET_LINE_BREAKS |
- BIDI_INFO |
- SHAPE_TEXT|
- GET_GLYPH_METRICS );
-
- textUpdateInfo.mParagraphCharacterIndex = 0u;
- textUpdateInfo.mRequestedNumberOfCharacters = impl.mModel->mLogicalModel->mText.Count();
-
- // Make sure the model is up-to-date before layouting
- impl.UpdateModel( onlyOnceOperations );
-
- DoRelayout( controller,
- Size( layoutSize.width, MAX_FLOAT ),
- static_cast<OperationsMask>( onlyOnceOperations | LAYOUT),
- textSize);
-
- // Clear the update info. This info will be set the next time the text is updated.
- textUpdateInfo.Clear();
- textUpdateInfo.mClearAll = true;
-
- if( textSize.width > layoutSize.width || textSize.height > layoutSize.height )
- {
- return false;
- }
- return true;
-}
-
-float Controller::Relayouter::GetHeightForWidth(Controller& controller, float width)
-{
- DALI_LOG_INFO( gLogFilter, Debug::Verbose, "-->Controller::GetHeightForWidth %p width %f\n", &controller, width );
- // Make sure the model is up-to-date before layouting
- controller.ProcessModifyEvents();
-
- Controller::Impl& impl = *controller.mImpl;
- ModelPtr& model = impl.mModel;
- VisualModelPtr& visualModel = model->mVisualModel;
- TextUpdateInfo& textUpdateInfo = impl.mTextUpdateInfo;
-
- Size layoutSize;
- if( fabsf( width - visualModel->mControlSize.width ) > Math::MACHINE_EPSILON_1000 ||
- textUpdateInfo.mFullRelayoutNeeded ||
- textUpdateInfo.mClearAll )
- {
- // Operations that can be done only once until the text changes.
- const OperationsMask onlyOnceOperations = static_cast<OperationsMask>( CONVERT_TO_UTF32 |
- GET_SCRIPTS |
- VALIDATE_FONTS |
- GET_LINE_BREAKS |
- BIDI_INFO |
- SHAPE_TEXT |
- GET_GLYPH_METRICS );
-
- // Set the update info to relayout the whole text.
- textUpdateInfo.mParagraphCharacterIndex = 0u;
- textUpdateInfo.mRequestedNumberOfCharacters = model->mLogicalModel->mText.Count();
-
- // Make sure the model is up-to-date before layouting
- impl.UpdateModel( onlyOnceOperations );
-
- // Get a reference to the pending operations member
- OperationsMask& operationsPending = impl.mOperationsPending;
-
- // Layout the text for the new width.
- operationsPending = static_cast<OperationsMask>( operationsPending | LAYOUT );
-
- // Store the actual control's width.
- const float actualControlWidth = visualModel->mControlSize.width;
-
- DoRelayout( controller,
- Size( width, MAX_FLOAT ),
- static_cast<OperationsMask>( onlyOnceOperations |
- LAYOUT ),
- layoutSize );
-
- // Do not do again the only once operations.
- operationsPending = static_cast<OperationsMask>( operationsPending & ~onlyOnceOperations );
-
- // Do the size related operations again.
- const OperationsMask sizeOperations = static_cast<OperationsMask>( LAYOUT |
- ALIGN |
- REORDER );
-
- operationsPending = static_cast<OperationsMask>( operationsPending | sizeOperations );
-
- // Clear the update info. This info will be set the next time the text is updated.
- textUpdateInfo.Clear();
- textUpdateInfo.mClearAll = true;
-
- // Restore the actual control's width.
- visualModel->mControlSize.width = actualControlWidth;
-
- DALI_LOG_INFO( gLogFilter, Debug::Verbose, "<--Controller::GetHeightForWidth calculated %f\n", layoutSize.height );
- }
- else
- {
- layoutSize = visualModel->GetLayoutSize();
- DALI_LOG_INFO( gLogFilter, Debug::Verbose, "<--Controller::GetHeightForWidth cached %f\n", layoutSize.height );
- }
-
- return layoutSize.height;
-}
-
-Controller::UpdateTextType Controller::Relayouter::Relayout(Controller& controller, const Size& size, Dali::LayoutDirection::Type layoutDirection)
-{
- Controller::Impl& impl = *controller.mImpl;
- ModelPtr& model = impl.mModel;
- VisualModelPtr& visualModel = model->mVisualModel;
- TextUpdateInfo& textUpdateInfo = impl.mTextUpdateInfo;
-
- DALI_LOG_INFO( gLogFilter, Debug::Verbose, "-->Controller::Relayout %p size %f,%f, autoScroll[%s]\n", &controller, size.width, size.height, impl.mIsAutoScrollEnabled ?"true":"false" );
-
- UpdateTextType updateTextType = NONE_UPDATED;
-
- if( ( size.width < Math::MACHINE_EPSILON_1000 ) || ( size.height < Math::MACHINE_EPSILON_1000 ) )
- {
- if( 0u != visualModel->mGlyphPositions.Count() )
- {
- visualModel->mGlyphPositions.Clear();
- updateTextType = MODEL_UPDATED;
- }
-
- // Clear the update info. This info will be set the next time the text is updated.
- textUpdateInfo.Clear();
-
- // Not worth to relayout if width or height is equal to zero.
- DALI_LOG_INFO( gLogFilter, Debug::Verbose, "<--Controller::Relayout (skipped)\n" );
-
- return updateTextType;
- }
-
- // Whether a new size has been set.
- const bool newSize = ( size != visualModel->mControlSize );
-
- // Get a reference to the pending operations member
- OperationsMask& operationsPending = impl.mOperationsPending;
-
- if( newSize )
- {
- DALI_LOG_INFO( gLogFilter, Debug::Verbose, "new size (previous size %f,%f)\n", visualModel->mControlSize.width, visualModel->mControlSize.height );
-
- if( ( 0 == textUpdateInfo.mNumberOfCharactersToAdd ) &&
- ( 0 == textUpdateInfo.mPreviousNumberOfCharacters ) &&
- ( ( visualModel->mControlSize.width < Math::MACHINE_EPSILON_1000 ) || ( visualModel->mControlSize.height < Math::MACHINE_EPSILON_1000 ) ) )
- {
- textUpdateInfo.mNumberOfCharactersToAdd = model->mLogicalModel->mText.Count();
- }
-
- // Layout operations that need to be done if the size changes.
- operationsPending = static_cast<OperationsMask>( operationsPending |
- LAYOUT |
- ALIGN |
- UPDATE_LAYOUT_SIZE |
- REORDER );
- // Set the update info to relayout the whole text.
- textUpdateInfo.mFullRelayoutNeeded = true;
- textUpdateInfo.mCharacterIndex = 0u;
-
- // Store the size used to layout the text.
- visualModel->mControlSize = size;
- }
-
- // Whether there are modify events.
- if( 0u != impl.mModifyEvents.Count() )
- {
- // Style operations that need to be done if the text is modified.
- operationsPending = static_cast<OperationsMask>( operationsPending | COLOR );
- }
-
- // Set the update info to elide the text.
- if( model->mElideEnabled ||
- ( ( NULL != impl.mEventData ) && impl.mEventData->mIsPlaceholderElideEnabled ) )
- {
- // Update Text layout for applying elided
- operationsPending = static_cast<OperationsMask>( operationsPending |
- ALIGN |
- LAYOUT |
- UPDATE_LAYOUT_SIZE |
- REORDER );
- textUpdateInfo.mFullRelayoutNeeded = true;
- textUpdateInfo.mCharacterIndex = 0u;
- }
-
- if( model->mMatchSystemLanguageDirection && impl.mLayoutDirection != layoutDirection )
- {
- // Clear the update info. This info will be set the next time the text is updated.
- textUpdateInfo.mClearAll = true;
- // Apply modifications to the model
- // Shape the text again is needed because characters like '()[]{}' have to be mirrored and the glyphs generated again.
- operationsPending = static_cast<OperationsMask>( operationsPending |
- GET_GLYPH_METRICS |
- SHAPE_TEXT |
- UPDATE_DIRECTION |
- LAYOUT |
- BIDI_INFO |
- REORDER );
- impl.mLayoutDirection = layoutDirection;
- }
-
- // Make sure the model is up-to-date before layouting.
- controller.ProcessModifyEvents();
- bool updated = impl.UpdateModel( operationsPending );
-
- // Layout the text.
- Size layoutSize;
- updated = DoRelayout( controller, size, operationsPending, layoutSize ) || updated;
-
-
- if( updated )
- {
- updateTextType = MODEL_UPDATED;
- }
-
- // Do not re-do any operation until something changes.
- operationsPending = NO_OPERATION;
- model->mScrollPositionLast = model->mScrollPosition;
-
- // Whether the text control is editable
- const bool isEditable = NULL != impl.mEventData;
-
- // Keep the current offset as it will be used to update the decorator's positions (if the size changes).
- Vector2 offset;
- if( newSize && isEditable )
- {
- offset = model->mScrollPosition;
- }
-
- if( !isEditable || !controller.IsMultiLineEnabled() )
- {
- // After doing the text layout, the vertical offset to place the actor in the desired position can be calculated.
- controller.CalculateVerticalOffset( size );
- }
-
- if( isEditable )
- {
- if( newSize )
- {
- // If there is a new size, the scroll position needs to be clamped.
- impl.ClampHorizontalScroll( layoutSize );
-
- // Update the decorator's positions is needed if there is a new size.
- impl.mEventData->mDecorator->UpdatePositions( model->mScrollPosition - offset );
- }
-
- // Move the cursor, grab handle etc.
- if( impl.ProcessInputEvents() )
- {
- updateTextType = static_cast<UpdateTextType>( updateTextType | DECORATOR_UPDATED );
- }
- }
-
- // Clear the update info. This info will be set the next time the text is updated.
- textUpdateInfo.Clear();
- DALI_LOG_INFO( gLogFilter, Debug::Verbose, "<--Controller::Relayout\n" );
-
- return updateTextType;
-}
-
-bool Controller::Relayouter::DoRelayout(Controller& controller, const Size& size, OperationsMask operationsRequired, Size& layoutSize )
-{
- DALI_LOG_INFO( gLogFilter, Debug::Verbose, "-->Controller::DoRelayout %p size %f,%f\n", &controller, size.width, size.height );
- bool viewUpdated( false );
-
- Controller::Impl& impl = *controller.mImpl;
-
- // Calculate the operations to be done.
- const OperationsMask operations = static_cast<OperationsMask>( impl.mOperationsPending & operationsRequired );
-
- TextUpdateInfo& textUpdateInfo = impl.mTextUpdateInfo;
- const CharacterIndex startIndex = textUpdateInfo.mParagraphCharacterIndex;
- const Length requestedNumberOfCharacters = textUpdateInfo.mRequestedNumberOfCharacters;
-
- // Get the current layout size.
- VisualModelPtr& visualModel = impl.mModel->mVisualModel;
- layoutSize = visualModel->GetLayoutSize();
-
- if( NO_OPERATION != ( LAYOUT & operations ) )
- {
- DALI_LOG_INFO( gLogFilter, Debug::Verbose, "-->Controller::DoRelayout LAYOUT & operations\n");
-
- // Some vectors with data needed to layout and reorder may be void
- // after the first time the text has been laid out.
- // Fill the vectors again.
-
- // Calculate the number of glyphs to layout.
- const Vector<GlyphIndex>& charactersToGlyph = visualModel->mCharactersToGlyph;
- const Vector<Length>& glyphsPerCharacter = visualModel->mGlyphsPerCharacter;
- const GlyphIndex* const charactersToGlyphBuffer = charactersToGlyph.Begin();
- const Length* const glyphsPerCharacterBuffer = glyphsPerCharacter.Begin();
-
- const CharacterIndex lastIndex = startIndex + ( ( requestedNumberOfCharacters > 0u ) ? requestedNumberOfCharacters - 1u : 0u );
- const GlyphIndex startGlyphIndex = textUpdateInfo.mStartGlyphIndex;
-
- // Make sure the index is not out of bound
- if ( charactersToGlyph.Count() != glyphsPerCharacter.Count() ||
- requestedNumberOfCharacters > charactersToGlyph.Count() ||
- ( lastIndex > charactersToGlyph.Count() && charactersToGlyph.Count() > 0u ) )
- {
- std::string currentText;
- controller.GetText( currentText );
-
- DALI_LOG_ERROR( "Controller::DoRelayout: Attempting to access invalid buffer\n" );
- DALI_LOG_ERROR( "Current text is: %s\n", currentText.c_str() );
- DALI_LOG_ERROR( "startIndex: %u, lastIndex: %u, requestedNumberOfCharacters: %u, charactersToGlyph.Count = %lu, glyphsPerCharacter.Count = %lu\n", startIndex, lastIndex, requestedNumberOfCharacters, charactersToGlyph.Count(), glyphsPerCharacter.Count());
-
- return false;
- }
-
- const Length numberOfGlyphs = ( requestedNumberOfCharacters > 0u ) ? *( charactersToGlyphBuffer + lastIndex ) + *( glyphsPerCharacterBuffer + lastIndex ) - startGlyphIndex : 0u;
- const Length totalNumberOfGlyphs = visualModel->mGlyphs.Count();
-
- if( 0u == totalNumberOfGlyphs )
- {
- if( NO_OPERATION != ( UPDATE_LAYOUT_SIZE & operations ) )
- {
- visualModel->SetLayoutSize( Size::ZERO );
- }
-
- // Nothing else to do if there is no glyphs.
- DALI_LOG_INFO( gLogFilter, Debug::Verbose, "<--Controller::DoRelayout no glyphs, view updated true\n" );
- return true;
- }
-
- // Set the layout parameters.
- Layout::Parameters layoutParameters( size, impl.mModel);
-
- // Resize the vector of positions to have the same size than the vector of glyphs.
- Vector<Vector2>& glyphPositions = visualModel->mGlyphPositions;
- glyphPositions.Resize( totalNumberOfGlyphs );
-
- // Whether the last character is a new paragraph character.
- const Character* const textBuffer = impl.mModel->mLogicalModel->mText.Begin();
- textUpdateInfo.mIsLastCharacterNewParagraph = TextAbstraction::IsNewParagraph( *( textBuffer + ( impl.mModel->mLogicalModel->mText.Count() - 1u ) ) );
- layoutParameters.isLastNewParagraph = textUpdateInfo.mIsLastCharacterNewParagraph;
-
- // The initial glyph and the number of glyphs to layout.
- layoutParameters.startGlyphIndex = startGlyphIndex;
- layoutParameters.numberOfGlyphs = numberOfGlyphs;
- layoutParameters.startLineIndex = textUpdateInfo.mStartLineIndex;
- layoutParameters.estimatedNumberOfLines = textUpdateInfo.mEstimatedNumberOfLines;
-
- // Update the ellipsis
- bool elideTextEnabled = impl.mModel->mElideEnabled;
-
- if( NULL != impl.mEventData )
- {
- if( impl.mEventData->mPlaceholderEllipsisFlag && impl.IsShowingPlaceholderText() )
- {
- elideTextEnabled = impl.mEventData->mIsPlaceholderElideEnabled;
- }
- else if( EventData::INACTIVE != impl.mEventData->mState )
- {
- // Disable ellipsis when editing
- elideTextEnabled = false;
- }
-
- // Reset the scroll position in inactive state
- if( elideTextEnabled && ( impl.mEventData->mState == EventData::INACTIVE ) )
- {
- controller.ResetScrollPosition();
- }
- }
-
- // Update the visual model.
- bool isAutoScrollEnabled = impl.mIsAutoScrollEnabled;
- Size newLayoutSize;
- viewUpdated = impl.mLayoutEngine.LayoutText( layoutParameters,
- newLayoutSize,
- elideTextEnabled,
- isAutoScrollEnabled );
- impl.mIsAutoScrollEnabled = isAutoScrollEnabled;
-
- viewUpdated = viewUpdated || ( newLayoutSize != layoutSize );
-
- if( viewUpdated )
- {
- layoutSize = newLayoutSize;
-
- if( NO_OPERATION != ( UPDATE_DIRECTION & operations ) )
- {
- impl.mIsTextDirectionRTL = false;
- }
-
- if ( ( NO_OPERATION != ( UPDATE_DIRECTION & operations ) ) && !visualModel->mLines.Empty() )
- {
- impl.mIsTextDirectionRTL = visualModel->mLines[0u].direction;
- }
-
- // Sets the layout size.
- if( NO_OPERATION != ( UPDATE_LAYOUT_SIZE & operations ) )
- {
- visualModel->SetLayoutSize( layoutSize );
- }
- } // view updated
- }
-
- if( NO_OPERATION != ( ALIGN & operations ) )
- {
- // The laid-out lines.
- Vector<LineRun>& lines = visualModel->mLines;
-
- CharacterIndex alignStartIndex = startIndex;
- Length alignRequestedNumberOfCharacters = requestedNumberOfCharacters;
-
- // the whole text needs to be full aligned.
- // If you do not do a full aligned, only the last line of the multiline input is aligned.
- if( impl.mEventData && impl.mEventData->mUpdateAlignment )
- {
- alignStartIndex = 0u;
- alignRequestedNumberOfCharacters = impl.mModel->mLogicalModel->mText.Count();
- impl.mEventData->mUpdateAlignment = false;
- }
-
- // Need to align with the control's size as the text may contain lines
- // starting either with left to right text or right to left.
- impl.mLayoutEngine.Align( size,
- alignStartIndex,
- alignRequestedNumberOfCharacters,
- impl.mModel->mHorizontalAlignment,
- lines,
- impl.mModel->mAlignmentOffset,
- impl.mLayoutDirection,
- impl.mModel->mMatchSystemLanguageDirection );
-
- viewUpdated = true;
- }
-#if defined(DEBUG_ENABLED)
- std::string currentText;
- controller.GetText( currentText );
- DALI_LOG_INFO( gLogFilter, Debug::Concise, "Controller::DoRelayout [%p] mImpl->mIsTextDirectionRTL[%s] [%s]\n", &controller, (impl.mIsTextDirectionRTL)?"true":"false", currentText.c_str() );
-#endif
- DALI_LOG_INFO( gLogFilter, Debug::Verbose, "<--Controller::DoRelayout, view updated %s\n", ( viewUpdated ? "true" : "false" ) );
- return viewUpdated;
-}
-
-void Controller::Relayouter::CalculateVerticalOffset(Controller& controller, const Size& controlSize)
-{
- Controller::Impl& impl = *controller.mImpl;
- ModelPtr& model = impl.mModel;
- Size layoutSize = model->mVisualModel->GetLayoutSize();
-
- if( fabsf( layoutSize.height ) < Math::MACHINE_EPSILON_1000 )
- {
- // Get the line height of the default font.
- layoutSize.height = impl.GetDefaultFontLineHeight();
- }
-
- switch( model->mVerticalAlignment )
- {
- case VerticalAlignment::TOP:
- {
- model->mScrollPosition.y = 0.f;
- break;
- }
- case VerticalAlignment::CENTER:
- {
- model->mScrollPosition.y = floorf( 0.5f * ( controlSize.height - layoutSize.height ) ); // try to avoid pixel alignment.
- break;
- }
- case VerticalAlignment::BOTTOM:
- {
- model->mScrollPosition.y = controlSize.height - layoutSize.height;
- break;
- }
- }
-}
-
-} // namespace Text
-
-} // namespace Toolkit
-
-} // namespace Dali