2 * Copyright (c) 2015 Samsung Electronics Co., Ltd.
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
19 #include <dali-toolkit/internal/text/text-controller-impl.h>
22 #include <dali/public-api/adaptor-framework/key.h>
23 #include <dali/integration-api/debug.h>
26 #include <dali-toolkit/internal/text/bidirectional-support.h>
27 #include <dali-toolkit/internal/text/character-set-conversion.h>
28 #include <dali-toolkit/internal/text/layouts/layout-parameters.h>
29 #include <dali-toolkit/internal/text/multi-language-support.h>
30 #include <dali-toolkit/internal/text/script-run.h>
31 #include <dali-toolkit/internal/text/segmentation.h>
32 #include <dali-toolkit/internal/text/shaper.h>
33 #include <dali-toolkit/internal/text/text-io.h>
34 #include <dali-toolkit/internal/text/text-view.h>
39 #if defined(DEBUG_ENABLED)
40 Debug::Filter* gLogFilter = Debug::Filter::New(Debug::Concise, true, "LOG_TEXT_CONTROLS");
44 * @brief Some characters can be shaped in more than one glyph.
45 * This struct is used to retrieve metrics from these group of glyphs.
59 float fontHeight; ///< The font's height of that glyphs.
60 float advance; ///< The sum of all the advances of all the glyphs.
61 float ascender; ///< The font's ascender.
62 float xBearing; ///< The x bearing of the first glyph.
65 const std::string EMPTY_STRING("");
79 * @brief Get some glyph's metrics of a group of glyphs formed as a result of shaping one character.
81 * @param[in] glyphIndex The index to the first glyph.
82 * @param[in] numberOfGlyphs The number of glyphs.
83 * @param[out] glyphMetrics Some glyph metrics (font height, advance, ascender and x bearing).
87 void GetGlyphsMetrics( GlyphIndex glyphIndex,
88 Length numberOfGlyphs,
89 GlyphMetrics& glyphMetrics,
90 VisualModelPtr visualModel,
91 TextAbstraction::FontClient& fontClient )
93 const GlyphInfo* glyphsBuffer = visualModel->mGlyphs.Begin();
95 const GlyphInfo& firstGlyph = *( glyphsBuffer + glyphIndex );
97 Text::FontMetrics fontMetrics;
98 fontClient.GetFontMetrics( firstGlyph.fontId, fontMetrics );
100 glyphMetrics.fontHeight = fontMetrics.height;
101 glyphMetrics.advance = firstGlyph.advance;
102 glyphMetrics.ascender = fontMetrics.ascender;
103 glyphMetrics.xBearing = firstGlyph.xBearing;
105 for( unsigned int i = 1u; i < numberOfGlyphs; ++i )
107 const GlyphInfo& glyphInfo = *( glyphsBuffer + glyphIndex + i );
109 glyphMetrics.advance += glyphInfo.advance;
113 EventData::EventData( DecoratorPtr decorator )
114 : mDecorator( decorator ),
115 mPlaceholderTextActive(),
116 mPlaceholderTextInactive(),
117 mPlaceholderTextColor( 0.8f, 0.8f, 0.8f, 0.8f ),
121 mPrimaryCursorPosition( 0u ),
122 mLeftSelectionPosition( 0u ),
123 mRightSelectionPosition( 0u ),
124 mPreEditStartPosition( 0u ),
125 mPreEditLength( 0u ),
126 mIsShowingPlaceholderText( false ),
127 mPreEditFlag( false ),
128 mDecoratorUpdated( false ),
129 mCursorBlinkEnabled( true ),
130 mGrabHandleEnabled( true ),
131 mGrabHandlePopupEnabled( true ),
132 mSelectionEnabled( true ),
133 mHorizontalScrollingEnabled( true ),
134 mVerticalScrollingEnabled( false ),
135 mUpdateCursorPosition( false ),
136 mUpdateLeftSelectionPosition( false ),
137 mUpdateRightSelectionPosition( false ),
138 mScrollAfterUpdatePosition( false ),
139 mScrollAfterDelete( false ),
140 mAllTextSelected( false )
143 EventData::~EventData()
146 bool Controller::Impl::ProcessInputEvents()
148 DALI_LOG_INFO( gLogFilter, Debug::Verbose, "-->Controller::ProcessInputEvents\n" );
149 if( NULL == mEventData )
151 // Nothing to do if there is no text input.
152 DALI_LOG_INFO( gLogFilter, Debug::Verbose, "<--Controller::ProcessInputEvents no event data\n" );
156 if( mEventData->mDecorator )
158 for( std::vector<Event>::iterator iter = mEventData->mEventQueue.begin();
159 iter != mEventData->mEventQueue.end();
164 case Event::CURSOR_KEY_EVENT:
166 OnCursorKeyEvent( *iter );
169 case Event::TAP_EVENT:
174 case Event::LONG_PRESS_EVENT:
176 OnLongPressEvent( *iter );
179 case Event::PAN_EVENT:
184 case Event::GRAB_HANDLE_EVENT:
185 case Event::LEFT_SELECTION_HANDLE_EVENT:
186 case Event::RIGHT_SELECTION_HANDLE_EVENT: // Fall through
188 OnHandleEvent( *iter );
193 OnSelectEvent( *iter );
196 case Event::SELECT_ALL:
205 // The cursor must also be repositioned after inserts into the model
206 if( mEventData->mUpdateCursorPosition )
208 // Updates the cursor position and scrolls the text to make it visible.
210 UpdateCursorPosition();
212 if( mEventData->mScrollAfterUpdatePosition )
214 const Vector2& primaryCursorPosition = mEventData->mDecorator->GetPosition( PRIMARY_CURSOR );
216 ScrollToMakePositionVisible( primaryCursorPosition );
217 mEventData->mScrollAfterUpdatePosition = false;
220 mEventData->mDecoratorUpdated = true;
221 mEventData->mUpdateCursorPosition = false;
223 else if( mEventData->mScrollAfterDelete )
225 ScrollTextToMatchCursor();
226 mEventData->mDecoratorUpdated = true;
227 mEventData->mScrollAfterDelete = false;
231 bool leftScroll = false;
232 bool rightScroll = false;
234 if( mEventData->mUpdateLeftSelectionPosition )
236 UpdateSelectionHandle( LEFT_SELECTION_HANDLE );
238 if( mEventData->mScrollAfterUpdatePosition )
240 const Vector2& leftHandlePosition = mEventData->mDecorator->GetPosition( LEFT_SELECTION_HANDLE );
242 ScrollToMakePositionVisible( leftHandlePosition );
247 mEventData->mDecoratorUpdated = true;
248 mEventData->mUpdateLeftSelectionPosition = false;
251 if( mEventData->mUpdateRightSelectionPosition )
253 UpdateSelectionHandle( RIGHT_SELECTION_HANDLE );
255 if( mEventData->mScrollAfterUpdatePosition )
257 const Vector2& rightHandlePosition = mEventData->mDecorator->GetPosition( RIGHT_SELECTION_HANDLE );
259 ScrollToMakePositionVisible( rightHandlePosition );
264 mEventData->mDecoratorUpdated = true;
265 mEventData->mUpdateRightSelectionPosition = false;
268 if( leftScroll || rightScroll )
270 mEventData->mScrollAfterUpdatePosition = false;
274 mEventData->mEventQueue.clear();
276 DALI_LOG_INFO( gLogFilter, Debug::Verbose, "<--Controller::ProcessInputEvents\n" );
278 const bool decoratorUpdated = mEventData->mDecoratorUpdated;
279 mEventData->mDecoratorUpdated = false;
281 return decoratorUpdated;
284 void Controller::Impl::UpdateModel( OperationsMask operationsRequired )
286 // Calculate the operations to be done.
287 const OperationsMask operations = static_cast<OperationsMask>( mOperationsPending & operationsRequired );
289 Vector<Character>& utf32Characters = mLogicalModel->mText;
291 const Length numberOfCharacters = utf32Characters.Count();
293 Vector<LineBreakInfo>& lineBreakInfo = mLogicalModel->mLineBreakInfo;
294 if( GET_LINE_BREAKS & operations )
296 // Retrieves the line break info. The line break info is used to split the text in 'paragraphs' to
297 // calculate the bidirectional info for each 'paragraph'.
298 // It's also used to layout the text (where it should be a new line) or to shape the text (text in different lines
299 // is not shaped together).
300 lineBreakInfo.Resize( numberOfCharacters, TextAbstraction::LINE_NO_BREAK );
302 SetLineBreakInfo( utf32Characters,
306 Vector<WordBreakInfo>& wordBreakInfo = mLogicalModel->mWordBreakInfo;
307 if( GET_WORD_BREAKS & operations )
309 // Retrieves the word break info. The word break info is used to layout the text (where to wrap the text in lines).
310 wordBreakInfo.Resize( numberOfCharacters, TextAbstraction::WORD_NO_BREAK );
312 SetWordBreakInfo( utf32Characters,
316 const bool getScripts = GET_SCRIPTS & operations;
317 const bool validateFonts = VALIDATE_FONTS & operations;
319 Vector<ScriptRun>& scripts = mLogicalModel->mScriptRuns;
320 Vector<FontRun>& validFonts = mLogicalModel->mFontRuns;
322 if( getScripts || validateFonts )
324 // Validates the fonts assigned by the application or assigns default ones.
325 // It makes sure all the characters are going to be rendered by the correct font.
326 MultilanguageSupport multilanguageSupport = MultilanguageSupport::Get();
330 // Retrieves the scripts used in the text.
331 multilanguageSupport.SetScripts( utf32Characters,
338 if( 0u == validFonts.Count() )
340 // Copy the requested font defaults received via the property system.
341 // These may not be valid i.e. may not contain glyphs for the necessary scripts.
342 GetDefaultFonts( validFonts, numberOfCharacters );
345 // Validates the fonts. If there is a character with no assigned font it sets a default one.
346 // After this call, fonts are validated.
347 multilanguageSupport.ValidateFonts( utf32Characters,
353 Vector<Character> mirroredUtf32Characters;
354 bool textMirrored = false;
355 if( BIDI_INFO & operations )
357 // Count the number of LINE_NO_BREAK to reserve some space for the vector of paragraph's
358 // bidirectional info.
360 Length numberOfParagraphs = 0u;
362 const TextAbstraction::LineBreakInfo* lineBreakInfoBuffer = lineBreakInfo.Begin();
363 for( Length index = 0u; index < numberOfCharacters; ++index )
365 if( TextAbstraction::LINE_NO_BREAK == *( lineBreakInfoBuffer + index ) )
367 ++numberOfParagraphs;
371 Vector<BidirectionalParagraphInfoRun>& bidirectionalInfo = mLogicalModel->mBidirectionalParagraphInfo;
372 bidirectionalInfo.Reserve( numberOfParagraphs );
374 // Calculates the bidirectional info for the whole paragraph if it contains right to left scripts.
375 SetBidirectionalInfo( utf32Characters,
380 if( 0u != bidirectionalInfo.Count() )
382 // This paragraph has right to left text. Some characters may need to be mirrored.
383 // TODO: consider if the mirrored string can be stored as well.
385 textMirrored = GetMirroredText( utf32Characters, mirroredUtf32Characters );
387 // Only set the character directions if there is right to left characters.
388 Vector<CharacterDirection>& directions = mLogicalModel->mCharacterDirections;
389 directions.Resize( numberOfCharacters );
391 GetCharactersDirection( bidirectionalInfo,
396 // There is no right to left characters. Clear the directions vector.
397 mLogicalModel->mCharacterDirections.Clear();
402 Vector<GlyphInfo>& glyphs = mVisualModel->mGlyphs;
403 Vector<CharacterIndex>& glyphsToCharactersMap = mVisualModel->mGlyphsToCharacters;
404 Vector<Length>& charactersPerGlyph = mVisualModel->mCharactersPerGlyph;
405 if( SHAPE_TEXT & operations )
407 const Vector<Character>& textToShape = textMirrored ? mirroredUtf32Characters : utf32Characters;
409 ShapeText( textToShape,
414 glyphsToCharactersMap,
415 charactersPerGlyph );
417 // Create the 'number of glyphs' per character and the glyph to character conversion tables.
418 mVisualModel->CreateGlyphsPerCharacterTable( numberOfCharacters );
419 mVisualModel->CreateCharacterToGlyphTable( numberOfCharacters );
422 const Length numberOfGlyphs = glyphs.Count();
424 if( GET_GLYPH_METRICS & operations )
426 mFontClient.GetGlyphMetrics( glyphs.Begin(), numberOfGlyphs );
430 void Controller::Impl::GetDefaultFonts( Vector<FontRun>& fonts, Length numberOfCharacters )
435 fontRun.characterRun.characterIndex = 0;
436 fontRun.characterRun.numberOfCharacters = numberOfCharacters;
437 fontRun.fontId = mFontDefaults->GetFontId( mFontClient );
438 fontRun.isDefault = true;
440 fonts.PushBack( fontRun );
444 void Controller::Impl::OnCursorKeyEvent( const Event& event )
446 if( NULL == mEventData )
448 // Nothing to do if there is no text input.
452 int keyCode = event.p1.mInt;
454 if( Dali::DALI_KEY_CURSOR_LEFT == keyCode )
456 if( mEventData->mPrimaryCursorPosition > 0u )
458 mEventData->mPrimaryCursorPosition = CalculateNewCursorIndex( mEventData->mPrimaryCursorPosition - 1u );
461 else if( Dali::DALI_KEY_CURSOR_RIGHT == keyCode )
463 if( mLogicalModel->mText.Count() > mEventData->mPrimaryCursorPosition )
465 mEventData->mPrimaryCursorPosition = CalculateNewCursorIndex( mEventData->mPrimaryCursorPosition );
468 else if( Dali::DALI_KEY_CURSOR_UP == keyCode )
472 else if( Dali::DALI_KEY_CURSOR_DOWN == keyCode )
477 mEventData->mUpdateCursorPosition = true;
478 mEventData->mScrollAfterUpdatePosition = true;
481 void Controller::Impl::OnTapEvent( const Event& event )
483 if( NULL != mEventData )
485 const unsigned int tapCount = event.p1.mUint;
489 if( ! IsShowingPlaceholderText() )
491 const float xPosition = event.p2.mFloat - mEventData->mScrollPosition.x - mAlignmentOffset.x;
492 const float yPosition = event.p3.mFloat - mEventData->mScrollPosition.y - mAlignmentOffset.y;
494 mEventData->mPrimaryCursorPosition = GetClosestCursorIndex( xPosition,
499 mEventData->mPrimaryCursorPosition = 0u;
502 mEventData->mUpdateCursorPosition = true;
503 mEventData->mScrollAfterUpdatePosition = true;
508 void Controller::Impl::OnPanEvent( const Event& event )
510 if( NULL == mEventData )
512 // Nothing to do if there is no text input.
516 int state = event.p1.mInt;
518 if( Gesture::Started == state ||
519 Gesture::Continuing == state )
521 const Vector2& actualSize = mVisualModel->GetActualSize();
522 const Vector2 currentScroll = mEventData->mScrollPosition;
524 if( mEventData->mHorizontalScrollingEnabled )
526 const float displacementX = event.p2.mFloat;
527 mEventData->mScrollPosition.x += displacementX;
529 ClampHorizontalScroll( actualSize );
532 if( mEventData->mVerticalScrollingEnabled )
534 const float displacementY = event.p3.mFloat;
535 mEventData->mScrollPosition.y += displacementY;
537 ClampVerticalScroll( actualSize );
540 if( mEventData->mDecorator )
542 mEventData->mDecorator->UpdatePositions( mEventData->mScrollPosition - currentScroll );
547 void Controller::Impl::OnLongPressEvent( const Event& event )
549 if ( EventData::EDITING == mEventData->mState )
551 ChangeState ( EventData::EDITING_WITH_POPUP );
552 mEventData->mDecoratorUpdated = true;
556 void Controller::Impl::OnHandleEvent( const Event& event )
558 if( NULL == mEventData )
560 // Nothing to do if there is no text input.
564 const unsigned int state = event.p1.mUint;
565 const bool handleStopScrolling = ( HANDLE_STOP_SCROLLING == state );
567 if( HANDLE_PRESSED == state )
569 // The event.p2 and event.p3 are in decorator coords. Need to transforms to text coords.
570 const float xPosition = event.p2.mFloat - mEventData->mScrollPosition.x - mAlignmentOffset.x;
571 const float yPosition = event.p3.mFloat - mEventData->mScrollPosition.y - mAlignmentOffset.y;
573 const CharacterIndex handleNewPosition = GetClosestCursorIndex( xPosition, yPosition );
575 if( Event::GRAB_HANDLE_EVENT == event.type )
577 ChangeState ( EventData::GRAB_HANDLE_PANNING );
579 if( handleNewPosition != mEventData->mPrimaryCursorPosition )
581 mEventData->mPrimaryCursorPosition = handleNewPosition;
582 mEventData->mUpdateCursorPosition = true;
585 else if( Event::LEFT_SELECTION_HANDLE_EVENT == event.type )
587 ChangeState ( EventData::SELECTION_HANDLE_PANNING );
589 if( ( handleNewPosition != mEventData->mLeftSelectionPosition ) &&
590 ( handleNewPosition != mEventData->mRightSelectionPosition ) )
592 mEventData->mLeftSelectionPosition = handleNewPosition;
594 RepositionSelectionHandles( mEventData->mLeftSelectionPosition,
595 mEventData->mRightSelectionPosition );
597 mEventData->mUpdateLeftSelectionPosition = true;
600 else if( Event::RIGHT_SELECTION_HANDLE_EVENT == event.type )
602 ChangeState ( EventData::SELECTION_HANDLE_PANNING );
604 if( ( handleNewPosition != mEventData->mRightSelectionPosition ) &&
605 ( handleNewPosition != mEventData->mLeftSelectionPosition ) )
607 mEventData->mRightSelectionPosition = handleNewPosition;
609 RepositionSelectionHandles( mEventData->mLeftSelectionPosition,
610 mEventData->mRightSelectionPosition );
612 mEventData->mUpdateRightSelectionPosition = true;
615 } // end ( HANDLE_PRESSED == state )
616 else if( ( HANDLE_RELEASED == state ) ||
617 handleStopScrolling )
619 CharacterIndex handlePosition = 0u;
620 if( handleStopScrolling )
622 // The event.p2 and event.p3 are in decorator coords. Need to transforms to text coords.
623 const float xPosition = event.p2.mFloat - mEventData->mScrollPosition.x - mAlignmentOffset.x;
624 const float yPosition = event.p3.mFloat - mEventData->mScrollPosition.y - mAlignmentOffset.y;
626 handlePosition = GetClosestCursorIndex( xPosition, yPosition );
629 if( Event::GRAB_HANDLE_EVENT == event.type )
631 mEventData->mUpdateCursorPosition = true;
633 ChangeState( EventData::EDITING_WITH_POPUP );
635 if( handleStopScrolling )
637 mEventData->mScrollAfterUpdatePosition = mEventData->mPrimaryCursorPosition != handlePosition;
638 mEventData->mPrimaryCursorPosition = handlePosition;
641 else if( Event::LEFT_SELECTION_HANDLE_EVENT == event.type )
643 ChangeState( EventData::SELECTING );
645 if( handleStopScrolling )
647 mEventData->mUpdateLeftSelectionPosition = ( mEventData->mLeftSelectionPosition != handlePosition ) && ( mEventData->mRightSelectionPosition != handlePosition);
648 mEventData->mScrollAfterUpdatePosition = mEventData->mUpdateLeftSelectionPosition;
650 if( mEventData->mUpdateLeftSelectionPosition )
652 mEventData->mLeftSelectionPosition = handlePosition;
654 RepositionSelectionHandles( mEventData->mLeftSelectionPosition,
655 mEventData->mRightSelectionPosition );
659 else if( Event::RIGHT_SELECTION_HANDLE_EVENT == event.type )
661 ChangeState( EventData::SELECTING );
663 if( handleStopScrolling )
665 mEventData->mUpdateRightSelectionPosition = ( mEventData->mRightSelectionPosition != handlePosition ) && ( mEventData->mLeftSelectionPosition != handlePosition );
666 mEventData->mScrollAfterUpdatePosition = mEventData->mUpdateRightSelectionPosition;
668 if( mEventData->mUpdateRightSelectionPosition )
670 mEventData->mRightSelectionPosition = handlePosition;
671 RepositionSelectionHandles( mEventData->mLeftSelectionPosition,
672 mEventData->mRightSelectionPosition );
677 mEventData->mDecoratorUpdated = true;
678 } // end ( ( HANDLE_RELEASED == state ) || ( HANDLE_STOP_SCROLLING == state ) )
679 else if( HANDLE_SCROLLING == state )
681 const float xSpeed = event.p2.mFloat;
682 const Vector2& actualSize = mVisualModel->GetActualSize();
683 const Vector2 currentScrollPosition = mEventData->mScrollPosition;
685 mEventData->mScrollPosition.x += xSpeed;
687 ClampHorizontalScroll( actualSize );
689 if( Vector2::ZERO == ( currentScrollPosition - mEventData->mScrollPosition ) )
691 // Notify the decorator there is no more text to scroll.
692 // The decorator won't send more scroll events.
693 mEventData->mDecorator->NotifyEndOfScroll();
697 const bool scrollRightDirection = xSpeed > 0.f;
698 const bool leftSelectionHandleEvent = Event::LEFT_SELECTION_HANDLE_EVENT == event.type;
699 const bool rightSelectionHandleEvent = Event::RIGHT_SELECTION_HANDLE_EVENT == event.type;
701 if( Event::GRAB_HANDLE_EVENT == event.type )
703 ChangeState( EventData::GRAB_HANDLE_PANNING );
705 Vector2 position = mEventData->mDecorator->GetPosition( GRAB_HANDLE );
707 // Position the grag handle close to either the left or right edge.
708 position.x = scrollRightDirection ? 0.f : mControlSize.width;
710 // Get the new handle position.
711 // The grab handle's position is in decorator coords. Need to transforms to text coords.
712 const CharacterIndex handlePosition = GetClosestCursorIndex( position.x - mEventData->mScrollPosition.x - mAlignmentOffset.x,
713 position.y - mEventData->mScrollPosition.y - mAlignmentOffset.y );
715 mEventData->mUpdateCursorPosition = mEventData->mPrimaryCursorPosition != handlePosition;
716 mEventData->mScrollAfterUpdatePosition = mEventData->mUpdateCursorPosition;
717 mEventData->mPrimaryCursorPosition = handlePosition;
719 else if( leftSelectionHandleEvent || rightSelectionHandleEvent )
721 // TODO: This is recalculating the selection box every time the text is scrolled with the selection handles.
722 // Think if something can be done to save power.
724 ChangeState( EventData::SELECTION_HANDLE_PANNING );
726 Vector2 position = mEventData->mDecorator->GetPosition( leftSelectionHandleEvent ? Text::LEFT_SELECTION_HANDLE : Text::RIGHT_SELECTION_HANDLE );
728 // Position the selection handle close to either the left or right edge.
729 position.x = scrollRightDirection ? 0.f : mControlSize.width;
731 // Get the new handle position.
732 // The selection handle's position is in decorator coords. Need to transforms to text coords.
733 const CharacterIndex handlePosition = GetClosestCursorIndex( position.x - mEventData->mScrollPosition.x - mAlignmentOffset.x,
734 position.y - mEventData->mScrollPosition.y - mAlignmentOffset.y );
736 if( leftSelectionHandleEvent )
738 mEventData->mUpdateLeftSelectionPosition = handlePosition != mEventData->mLeftSelectionPosition;
739 mEventData->mLeftSelectionPosition = handlePosition;
743 mEventData->mUpdateRightSelectionPosition = handlePosition != mEventData->mRightSelectionPosition;
744 mEventData->mRightSelectionPosition = handlePosition;
747 if( mEventData->mUpdateLeftSelectionPosition || mEventData->mUpdateRightSelectionPosition )
749 RepositionSelectionHandles( mEventData->mLeftSelectionPosition,
750 mEventData->mRightSelectionPosition );
752 mEventData->mScrollAfterUpdatePosition = true;
755 mEventData->mDecoratorUpdated = true;
757 } // end ( HANDLE_SCROLLING == state )
760 void Controller::Impl::OnSelectEvent( const Event& event )
762 if( NULL == mEventData )
764 // Nothing to do if there is no text.
768 if( mEventData->mSelectionEnabled )
770 // The event.p2 and event.p3 are in decorator coords. Need to transforms to text coords.
771 const float xPosition = event.p2.mFloat - mEventData->mScrollPosition.x - mAlignmentOffset.x;
772 const float yPosition = event.p3.mFloat - mEventData->mScrollPosition.y - mAlignmentOffset.y;
774 const CharacterIndex leftPosition = mEventData->mLeftSelectionPosition;
775 const CharacterIndex rightPosition = mEventData->mRightSelectionPosition;
777 RepositionSelectionHandles( xPosition,
780 mEventData->mUpdateLeftSelectionPosition = leftPosition != mEventData->mLeftSelectionPosition;
781 mEventData->mUpdateRightSelectionPosition = rightPosition != mEventData->mRightSelectionPosition;
783 mEventData->mScrollAfterUpdatePosition = ( ( mEventData->mUpdateLeftSelectionPosition || mEventData->mUpdateRightSelectionPosition ) &&
784 ( mEventData->mLeftSelectionPosition != mEventData->mRightSelectionPosition ) );
788 void Controller::Impl::OnSelectAllEvent()
790 if( NULL == mEventData )
792 // Nothing to do if there is no text.
796 if( mEventData->mSelectionEnabled )
798 RepositionSelectionHandles( 0u,
799 mLogicalModel->mText.Count() );
801 mEventData->mScrollAfterUpdatePosition = true;
802 mEventData->mUpdateLeftSelectionPosition = true;
803 mEventData->mUpdateRightSelectionPosition = true;
807 void Controller::Impl::RetrieveSelection( std::string& selectedText, bool deleteAfterRetreival )
809 if( mEventData->mLeftSelectionPosition == mEventData->mRightSelectionPosition )
811 // Nothing to select if handles are in the same place.
816 //Get start and end position of selection
817 uint32_t startOfSelectedText = mEventData->mLeftSelectionPosition;
818 uint32_t lengthOfSelectedText = mEventData->mRightSelectionPosition - startOfSelectedText;
820 // Validate the start and end selection points
821 if( ( startOfSelectedText >= 0 ) && ( ( startOfSelectedText + lengthOfSelectedText ) <= mLogicalModel->mText.Count() ) )
823 //Get text as a UTF8 string
824 Vector<Character>& utf32Characters = mLogicalModel->mText;
826 Utf32ToUtf8( &utf32Characters[startOfSelectedText], lengthOfSelectedText, selectedText );
828 if ( deleteAfterRetreival ) // Only delete text if copied successfully
830 // Delete text between handles
831 Vector<Character>& currentText = mLogicalModel->mText;
833 Vector<Character>::Iterator first = currentText.Begin() + startOfSelectedText;
834 Vector<Character>::Iterator last = first + lengthOfSelectedText;
835 currentText.Erase( first, last );
837 mEventData->mPrimaryCursorPosition = mEventData->mLeftSelectionPosition;
838 mEventData->mScrollAfterDelete = true;
839 mEventData->mDecoratorUpdated = true;
843 void Controller::Impl::ShowClipboard()
847 mClipboard.ShowClipboard();
851 void Controller::Impl::HideClipboard()
855 mClipboard.HideClipboard();
859 bool Controller::Impl::CopyStringToClipboard( std::string& source )
861 //Send string to clipboard
862 return ( mClipboard && mClipboard.SetItem( source ) );
865 void Controller::Impl::SendSelectionToClipboard( bool deleteAfterSending )
867 std::string selectedText;
868 RetrieveSelection( selectedText, deleteAfterSending );
869 CopyStringToClipboard( selectedText );
870 ChangeState( EventData::EDITING );
873 void Controller::Impl::GetTextFromClipboard( unsigned int itemIndex, std::string& retreivedString )
877 retreivedString = mClipboard.GetItem( itemIndex );
881 void Controller::Impl::RepositionSelectionHandles( CharacterIndex selectionStart, CharacterIndex selectionEnd )
883 if( selectionStart == selectionEnd )
885 // Nothing to select if handles are in the same place.
889 mEventData->mDecorator->ClearHighlights();
891 mEventData->mLeftSelectionPosition = selectionStart;
892 mEventData->mRightSelectionPosition = selectionEnd;
894 const GlyphIndex* const charactersToGlyphBuffer = mVisualModel->mCharactersToGlyph.Begin();
895 const Length* const glyphsPerCharacterBuffer = mVisualModel->mGlyphsPerCharacter.Begin();
896 const GlyphInfo* const glyphsBuffer = mVisualModel->mGlyphs.Begin();
897 const Vector2* const positionsBuffer = mVisualModel->mGlyphPositions.Begin();
899 // TODO: Better algorithm to create the highlight box.
902 const Vector<LineRun>& lines = mVisualModel->mLines;
903 const LineRun& firstLine = *lines.Begin();
904 const float height = firstLine.ascender + -firstLine.descender;
906 const bool indicesSwapped = ( selectionStart > selectionEnd );
909 std::swap( selectionStart, selectionEnd );
912 GlyphIndex glyphStart = *( charactersToGlyphBuffer + selectionStart );
913 GlyphIndex glyphEnd = *( charactersToGlyphBuffer + ( selectionEnd - 1u ) ) + *( glyphsPerCharacterBuffer + ( selectionEnd - 1u ) ) - 1u;
915 mEventData->mDecorator->SwapSelectionHandlesEnabled( firstLine.direction != indicesSwapped );
917 const Vector2 offset = mEventData->mScrollPosition + mAlignmentOffset;
919 for( GlyphIndex index = glyphStart; index <= glyphEnd; ++index )
921 const GlyphInfo& glyph = *( glyphsBuffer + index );
922 const Vector2& position = *( positionsBuffer + index );
924 const float xPosition = position.x - glyph.xBearing + offset.x;
925 mEventData->mDecorator->AddHighlight( xPosition, offset.y, xPosition + glyph.advance, height );
928 CursorInfo primaryCursorInfo;
929 GetCursorPosition( mEventData->mLeftSelectionPosition,
932 CursorInfo secondaryCursorInfo;
933 GetCursorPosition( mEventData->mRightSelectionPosition,
934 secondaryCursorInfo );
936 const Vector2 primaryPosition = primaryCursorInfo.primaryPosition + offset;
937 const Vector2 secondaryPosition = secondaryCursorInfo.primaryPosition + offset;
939 mEventData->mDecorator->SetPosition( LEFT_SELECTION_HANDLE, primaryPosition.x, primaryPosition.y, primaryCursorInfo.lineHeight );
941 mEventData->mDecorator->SetPosition( RIGHT_SELECTION_HANDLE, secondaryPosition.x, secondaryPosition.y, secondaryCursorInfo.lineHeight );
943 // Set the flag to update the decorator.
944 mEventData->mDecoratorUpdated = true;
947 void Controller::Impl::RepositionSelectionHandles( float visualX, float visualY )
949 if( NULL == mEventData )
951 // Nothing to do if there is no text input.
955 if( IsShowingPlaceholderText() )
957 // Nothing to do if there is the place-holder text.
961 const Length numberOfGlyphs = mVisualModel->mGlyphs.Count();
962 const Length numberOfLines = mVisualModel->mLines.Count();
963 if( 0 == numberOfGlyphs ||
966 // Nothing to do if there is no text.
970 // Find which word was selected
971 CharacterIndex selectionStart( 0 );
972 CharacterIndex selectionEnd( 0 );
973 FindSelectionIndices( visualX, visualY, selectionStart, selectionEnd );
974 DALI_LOG_INFO( gLogFilter, Debug::Verbose, "%p selectionStart %d selectionEnd %d\n", this, selectionStart, selectionEnd );
976 if( selectionStart == selectionEnd )
978 ChangeState( EventData::EDITING );
979 // Nothing to select. i.e. a white space, out of bounds
983 RepositionSelectionHandles( selectionStart, selectionEnd );
986 void Controller::Impl::SetPopupButtons()
989 * Sets the Popup buttons to be shown depending on State.
991 * If SELECTING : CUT & COPY + ( PASTE & CLIPBOARD if content available to paste )
993 * If EDITING_WITH_POPUP : SELECT & SELECT_ALL
996 TextSelectionPopup::Buttons buttonsToShow = TextSelectionPopup::NONE;
998 if ( ( EventData::SELECTING == mEventData->mState ) || ( EventData::SELECTION_CHANGED == mEventData->mState ) )
1000 buttonsToShow = TextSelectionPopup::Buttons( TextSelectionPopup::CUT | TextSelectionPopup::COPY );
1002 if ( !IsClipboardEmpty() )
1004 buttonsToShow = TextSelectionPopup::Buttons ( ( buttonsToShow | TextSelectionPopup::PASTE ) );
1005 buttonsToShow = TextSelectionPopup::Buttons ( ( buttonsToShow | TextSelectionPopup::CLIPBOARD ) );
1008 if ( !mEventData->mAllTextSelected )
1010 buttonsToShow = TextSelectionPopup::Buttons ( ( buttonsToShow | TextSelectionPopup::SELECT_ALL ) );
1013 else if ( EventData::EDITING_WITH_POPUP == mEventData->mState )
1015 if ( mLogicalModel->mText.Count() && !IsShowingPlaceholderText())
1017 buttonsToShow = TextSelectionPopup::Buttons( TextSelectionPopup::SELECT | TextSelectionPopup::SELECT_ALL );
1020 if ( !IsClipboardEmpty() )
1022 buttonsToShow = TextSelectionPopup::Buttons ( ( buttonsToShow | TextSelectionPopup::PASTE ) );
1023 buttonsToShow = TextSelectionPopup::Buttons ( ( buttonsToShow | TextSelectionPopup::CLIPBOARD ) );
1027 mEventData->mDecorator->SetEnabledPopupButtons( buttonsToShow );
1030 void Controller::Impl::ChangeState( EventData::State newState )
1032 if( NULL == mEventData )
1034 // Nothing to do if there is no text input.
1038 if( mEventData->mState != newState )
1040 mEventData->mState = newState;
1042 if( EventData::INACTIVE == mEventData->mState )
1044 mEventData->mDecorator->SetActiveCursor( ACTIVE_CURSOR_NONE );
1045 mEventData->mDecorator->StopCursorBlink();
1046 mEventData->mDecorator->SetHandleActive( GRAB_HANDLE, false );
1047 mEventData->mDecorator->SetHandleActive( LEFT_SELECTION_HANDLE, false );
1048 mEventData->mDecorator->SetHandleActive( RIGHT_SELECTION_HANDLE, false );
1049 mEventData->mDecorator->SetPopupActive( false );
1050 mEventData->mDecoratorUpdated = true;
1053 else if ( EventData::SELECTING == mEventData->mState )
1055 mEventData->mDecorator->SetActiveCursor( ACTIVE_CURSOR_NONE );
1056 mEventData->mDecorator->StopCursorBlink();
1057 mEventData->mDecorator->SetHandleActive( GRAB_HANDLE, false );
1058 mEventData->mDecorator->SetHandleActive( LEFT_SELECTION_HANDLE, true );
1059 mEventData->mDecorator->SetHandleActive( RIGHT_SELECTION_HANDLE, true );
1060 if( mEventData->mGrabHandlePopupEnabled )
1063 mEventData->mDecorator->SetPopupActive( true );
1065 mEventData->mDecoratorUpdated = true;
1067 else if ( EventData::SELECTION_CHANGED == mEventData->mState )
1069 if( mEventData->mGrabHandlePopupEnabled )
1072 mEventData->mDecorator->SetActiveCursor( ACTIVE_CURSOR_NONE );
1073 mEventData->mDecorator->SetPopupActive( true );
1075 mEventData->mDecoratorUpdated = true;
1077 else if( EventData::EDITING == mEventData->mState )
1079 mEventData->mDecorator->SetActiveCursor( ACTIVE_CURSOR_PRIMARY );
1080 if( mEventData->mCursorBlinkEnabled )
1082 mEventData->mDecorator->StartCursorBlink();
1084 // Grab handle is not shown until a tap is received whilst EDITING
1085 mEventData->mDecorator->SetHandleActive( GRAB_HANDLE, false );
1086 mEventData->mDecorator->SetHandleActive( LEFT_SELECTION_HANDLE, false );
1087 mEventData->mDecorator->SetHandleActive( RIGHT_SELECTION_HANDLE, false );
1088 if( mEventData->mGrabHandlePopupEnabled )
1090 mEventData->mDecorator->SetPopupActive( false );
1092 mEventData->mDecoratorUpdated = true;
1095 else if( EventData::EDITING_WITH_POPUP == mEventData->mState )
1097 mEventData->mDecorator->SetActiveCursor( ACTIVE_CURSOR_PRIMARY );
1098 if( mEventData->mCursorBlinkEnabled )
1100 mEventData->mDecorator->StartCursorBlink();
1102 if( mEventData->mSelectionEnabled )
1104 mEventData->mDecorator->SetHandleActive( LEFT_SELECTION_HANDLE, false );
1105 mEventData->mDecorator->SetHandleActive( RIGHT_SELECTION_HANDLE, false );
1109 mEventData->mDecorator->SetHandleActive( GRAB_HANDLE, true );
1111 if( mEventData->mGrabHandlePopupEnabled )
1114 mEventData->mDecorator->SetPopupActive( true );
1117 mEventData->mDecoratorUpdated = true;
1119 else if ( EventData::SELECTION_HANDLE_PANNING == mEventData->mState )
1121 mEventData->mDecorator->SetActiveCursor( ACTIVE_CURSOR_NONE );
1122 mEventData->mDecorator->StopCursorBlink();
1123 mEventData->mDecorator->SetHandleActive( GRAB_HANDLE, false );
1124 mEventData->mDecorator->SetHandleActive( LEFT_SELECTION_HANDLE, true );
1125 mEventData->mDecorator->SetHandleActive( RIGHT_SELECTION_HANDLE, true );
1126 if( mEventData->mGrabHandlePopupEnabled )
1128 mEventData->mDecorator->SetPopupActive( false );
1130 mEventData->mDecoratorUpdated = true;
1132 else if ( EventData::GRAB_HANDLE_PANNING == mEventData->mState )
1134 mEventData->mDecorator->SetActiveCursor( ACTIVE_CURSOR_PRIMARY );
1135 if( mEventData->mCursorBlinkEnabled )
1137 mEventData->mDecorator->StartCursorBlink();
1139 mEventData->mDecorator->SetHandleActive( GRAB_HANDLE, true );
1140 mEventData->mDecorator->SetHandleActive( LEFT_SELECTION_HANDLE, false );
1141 mEventData->mDecorator->SetHandleActive( RIGHT_SELECTION_HANDLE, false );
1142 if( mEventData->mGrabHandlePopupEnabled )
1144 mEventData->mDecorator->SetPopupActive( false );
1146 mEventData->mDecoratorUpdated = true;
1151 LineIndex Controller::Impl::GetClosestLine( float y ) const
1153 float totalHeight = 0.f;
1154 LineIndex lineIndex = 0u;
1156 const Vector<LineRun>& lines = mVisualModel->mLines;
1157 for( LineIndex endLine = lines.Count();
1158 lineIndex < endLine;
1161 const LineRun& lineRun = lines[lineIndex];
1162 totalHeight += lineRun.ascender + -lineRun.descender;
1163 if( y < totalHeight )
1169 if( lineIndex == 0 )
1177 void Controller::Impl::FindSelectionIndices( float visualX, float visualY, CharacterIndex& startIndex, CharacterIndex& endIndex )
1179 CharacterIndex hitCharacter = GetClosestCursorIndex( visualX, visualY );
1180 if( hitCharacter >= mLogicalModel->mText.Count() )
1182 // Selection out of bounds.
1186 startIndex = hitCharacter;
1187 endIndex = hitCharacter;
1189 if( !TextAbstraction::IsWhiteSpace( mLogicalModel->mText[hitCharacter] ) )
1191 // Find the start and end of the text
1192 for( startIndex = hitCharacter; startIndex > 0; --startIndex )
1194 Character charCode = mLogicalModel->mText[ startIndex-1 ];
1195 if( TextAbstraction::IsWhiteSpace( charCode ) )
1200 const CharacterIndex pastTheEnd = mLogicalModel->mText.Count();
1201 for( endIndex = hitCharacter + 1u; endIndex < pastTheEnd; ++endIndex )
1203 Character charCode = mLogicalModel->mText[ endIndex ];
1204 if( TextAbstraction::IsWhiteSpace( charCode ) )
1212 CharacterIndex Controller::Impl::GetClosestCursorIndex( float visualX,
1215 if( NULL == mEventData )
1217 // Nothing to do if there is no text input.
1221 CharacterIndex logicalIndex = 0u;
1223 const Length numberOfGlyphs = mVisualModel->mGlyphs.Count();
1224 const Length numberOfLines = mVisualModel->mLines.Count();
1225 if( 0 == numberOfGlyphs ||
1226 0 == numberOfLines )
1228 return logicalIndex;
1231 // Find which line is closest
1232 const LineIndex lineIndex = GetClosestLine( visualY );
1233 const LineRun& line = mVisualModel->mLines[lineIndex];
1235 // Get the positions of the glyphs.
1236 const Vector<Vector2>& positions = mVisualModel->mGlyphPositions;
1237 const Vector2* const positionsBuffer = positions.Begin();
1239 // Get the visual to logical conversion tables.
1240 const CharacterIndex* const visualToLogicalBuffer = ( 0u != mLogicalModel->mVisualToLogicalMap.Count() ) ? mLogicalModel->mVisualToLogicalMap.Begin() : NULL;
1241 const CharacterIndex* const visualToLogicalCursorBuffer = mLogicalModel->mVisualToLogicalCursorMap.Begin();
1243 // Get the character to glyph conversion table.
1244 const GlyphIndex* const charactersToGlyphBuffer = mVisualModel->mCharactersToGlyph.Begin();
1246 // Get the glyphs per character table.
1247 const Length* const glyphsPerCharacterBuffer = mVisualModel->mGlyphsPerCharacter.Begin();
1249 // If the vector is void, there is no right to left characters.
1250 const bool hasRightToLeftCharacters = NULL != visualToLogicalBuffer;
1252 const CharacterIndex startCharacter = line.characterRun.characterIndex;
1253 const CharacterIndex endCharacter = line.characterRun.characterIndex + line.characterRun.numberOfCharacters;
1254 DALI_ASSERT_DEBUG( endCharacter <= mLogicalModel->mText.Count() && "Invalid line info" );
1256 // Whether there is a hit on a glyph.
1257 bool matched = false;
1259 // Traverses glyphs in visual order. To do that use the visual to logical conversion table.
1260 CharacterIndex visualIndex = startCharacter;
1261 for( ; !matched && ( visualIndex < endCharacter ); ++visualIndex )
1263 // The character in logical order.
1264 const CharacterIndex characterLogicalOrderIndex = hasRightToLeftCharacters ? *( visualToLogicalBuffer + visualIndex ) : visualIndex;
1266 // The first glyph for that character in logical order.
1267 const GlyphIndex glyphLogicalOrderIndex = *( charactersToGlyphBuffer + characterLogicalOrderIndex );
1269 // The number of glyphs for that character
1270 const Length numberOfGlyphs = *( glyphsPerCharacterBuffer + characterLogicalOrderIndex );
1272 // Get the metrics for the group of glyphs.
1273 GlyphMetrics glyphMetrics;
1274 GetGlyphsMetrics( glyphLogicalOrderIndex,
1280 const Vector2& position = *( positionsBuffer + glyphLogicalOrderIndex );
1282 // Find the mid-point of the area containing the glyph
1283 const float glyphCenter = -glyphMetrics.xBearing + position.x + 0.5f * glyphMetrics.advance;
1285 if( visualX < glyphCenter )
1292 // Return the logical position of the cursor in characters.
1296 visualIndex = endCharacter;
1299 logicalIndex = hasRightToLeftCharacters ? *( visualToLogicalCursorBuffer + visualIndex ) : visualIndex;
1300 DALI_LOG_INFO( gLogFilter, Debug::Verbose, "%p closest visualIndex %d logicalIndex %d\n", this, visualIndex, logicalIndex );
1301 return logicalIndex;
1304 void Controller::Impl::GetCursorPosition( CharacterIndex logical,
1305 CursorInfo& cursorInfo )
1307 // TODO: Check for multiline with \n, etc...
1309 // Check if the logical position is the first or the last one of the text.
1310 const bool isFirstPosition = 0u == logical;
1311 const bool isLastPosition = mLogicalModel->mText.Count() == logical;
1313 if( isFirstPosition && isLastPosition )
1315 // There is zero characters. Get the default font.
1317 FontId defaultFontId = 0u;
1318 if( NULL == mFontDefaults )
1320 defaultFontId = mFontClient.GetFontId( EMPTY_STRING,
1325 defaultFontId = mFontDefaults->GetFontId( mFontClient );
1328 Text::FontMetrics fontMetrics;
1329 mFontClient.GetFontMetrics( defaultFontId, fontMetrics );
1331 cursorInfo.lineHeight = fontMetrics.ascender - fontMetrics.descender;
1332 cursorInfo.primaryCursorHeight = cursorInfo.lineHeight;
1334 cursorInfo.primaryPosition.x = 1.f;
1335 cursorInfo.primaryPosition.y = 0.f;
1337 // Nothing else to do.
1341 // Get the previous logical index.
1342 const CharacterIndex previousLogical = isFirstPosition ? 0u : logical - 1u;
1344 // Decrease the logical index if it's the last one.
1345 if( isLastPosition )
1350 // Get the direction of the character and the previous one.
1351 const CharacterDirection* const modelCharacterDirectionsBuffer = ( 0u != mLogicalModel->mCharacterDirections.Count() ) ? mLogicalModel->mCharacterDirections.Begin() : NULL;
1353 CharacterDirection isCurrentRightToLeft = false;
1354 CharacterDirection isPreviousRightToLeft = false;
1355 if( NULL != modelCharacterDirectionsBuffer ) // If modelCharacterDirectionsBuffer is NULL, it means the whole text is left to right.
1357 isCurrentRightToLeft = *( modelCharacterDirectionsBuffer + logical );
1358 isPreviousRightToLeft = *( modelCharacterDirectionsBuffer + previousLogical );
1361 // Get the line where the character is laid-out.
1362 const LineRun* modelLines = mVisualModel->mLines.Begin();
1364 const LineIndex lineIndex = mVisualModel->GetLineOfCharacter( logical );
1365 const LineRun& line = *( modelLines + lineIndex );
1367 // Get the paragraph's direction.
1368 const CharacterDirection isRightToLeftParagraph = line.direction;
1370 // Check whether there is an alternative position:
1372 cursorInfo.isSecondaryCursor = ( isCurrentRightToLeft != isPreviousRightToLeft ) ||
1373 ( isLastPosition && ( isRightToLeftParagraph != isCurrentRightToLeft ) );
1375 // Set the line height.
1376 cursorInfo.lineHeight = line.ascender + -line.descender;
1378 // Convert the cursor position into the glyph position.
1379 CharacterIndex characterIndex = logical;
1380 if( cursorInfo.isSecondaryCursor &&
1381 ( isRightToLeftParagraph != isCurrentRightToLeft ) )
1383 characterIndex = previousLogical;
1386 const GlyphIndex currentGlyphIndex = *( mVisualModel->mCharactersToGlyph.Begin() + characterIndex );
1387 const Length numberOfGlyphs = *( mVisualModel->mGlyphsPerCharacter.Begin() + characterIndex );
1388 const Length numberOfCharacters = *( mVisualModel->mCharactersPerGlyph.Begin() +currentGlyphIndex );
1390 // Get the metrics for the group of glyphs.
1391 GlyphMetrics glyphMetrics;
1392 GetGlyphsMetrics( currentGlyphIndex,
1398 float interGlyphAdvance = 0.f;
1399 if( !isLastPosition &&
1400 ( numberOfCharacters > 1u ) )
1402 const CharacterIndex firstIndex = *( mVisualModel->mGlyphsToCharacters.Begin() + currentGlyphIndex );
1403 interGlyphAdvance = static_cast<float>( characterIndex - firstIndex ) * glyphMetrics.advance / static_cast<float>( numberOfCharacters );
1406 // Get the glyph position and x bearing.
1407 const Vector2& currentPosition = *( mVisualModel->mGlyphPositions.Begin() + currentGlyphIndex );
1409 // Set the cursor's height.
1410 cursorInfo.primaryCursorHeight = glyphMetrics.fontHeight;
1412 // Set the position.
1413 cursorInfo.primaryPosition.x = -glyphMetrics.xBearing + currentPosition.x + ( isCurrentRightToLeft ? glyphMetrics.advance : interGlyphAdvance );
1414 cursorInfo.primaryPosition.y = line.ascender - glyphMetrics.ascender;
1416 if( isLastPosition )
1418 // The position of the cursor after the last character needs special
1419 // care depending on its direction and the direction of the paragraph.
1421 if( cursorInfo.isSecondaryCursor )
1423 // Need to find the first character after the last character with the paragraph's direction.
1424 // i.e l0 l1 l2 r0 r1 should find r0.
1426 // TODO: check for more than one line!
1427 characterIndex = isRightToLeftParagraph ? line.characterRun.characterIndex : line.characterRun.characterIndex + line.characterRun.numberOfCharacters - 1u;
1428 characterIndex = mLogicalModel->GetLogicalCharacterIndex( characterIndex );
1430 const GlyphIndex glyphIndex = *( mVisualModel->mCharactersToGlyph.Begin() + characterIndex );
1431 const Length numberOfGlyphs = *( mVisualModel->mGlyphsPerCharacter.Begin() + characterIndex );
1433 const Vector2& position = *( mVisualModel->mGlyphPositions.Begin() + glyphIndex );
1435 // Get the metrics for the group of glyphs.
1436 GlyphMetrics glyphMetrics;
1437 GetGlyphsMetrics( glyphIndex,
1443 cursorInfo.primaryPosition.x = -glyphMetrics.xBearing + position.x + ( isRightToLeftParagraph ? 0.f : glyphMetrics.advance );
1445 cursorInfo.primaryPosition.y = line.ascender - glyphMetrics.ascender;
1449 if( !isCurrentRightToLeft )
1451 cursorInfo.primaryPosition.x += glyphMetrics.advance;
1455 cursorInfo.primaryPosition.x -= glyphMetrics.advance;
1460 // Set the alternative cursor position.
1461 if( cursorInfo.isSecondaryCursor )
1463 // Convert the cursor position into the glyph position.
1464 const CharacterIndex previousCharacterIndex = ( ( isRightToLeftParagraph != isCurrentRightToLeft ) ? logical : previousLogical );
1465 const GlyphIndex previousGlyphIndex = *( mVisualModel->mCharactersToGlyph.Begin() + previousCharacterIndex );
1466 const Length numberOfGlyphs = *( mVisualModel->mGlyphsPerCharacter.Begin() + previousCharacterIndex );
1468 // Get the glyph position.
1469 const Vector2& previousPosition = *( mVisualModel->mGlyphPositions.Begin() + previousGlyphIndex );
1471 // Get the metrics for the group of glyphs.
1472 GlyphMetrics glyphMetrics;
1473 GetGlyphsMetrics( previousGlyphIndex,
1479 // Set the cursor position and height.
1480 cursorInfo.secondaryPosition.x = -glyphMetrics.xBearing + previousPosition.x + ( ( ( isLastPosition && !isCurrentRightToLeft ) ||
1481 ( !isLastPosition && isCurrentRightToLeft ) ) ? glyphMetrics.advance : 0.f );
1483 cursorInfo.secondaryCursorHeight = 0.5f * glyphMetrics.fontHeight;
1485 cursorInfo.secondaryPosition.y = cursorInfo.lineHeight - cursorInfo.secondaryCursorHeight - line.descender - ( glyphMetrics.fontHeight - glyphMetrics.ascender );
1487 // Update the primary cursor height as well.
1488 cursorInfo.primaryCursorHeight *= 0.5f;
1492 CharacterIndex Controller::Impl::CalculateNewCursorIndex( CharacterIndex index ) const
1494 if( NULL == mEventData )
1496 // Nothing to do if there is no text input.
1500 CharacterIndex cursorIndex = mEventData->mPrimaryCursorPosition;
1502 const Script script = mLogicalModel->GetScript( index );
1503 const GlyphIndex* charactersToGlyphBuffer = mVisualModel->mCharactersToGlyph.Begin();
1504 const Length* charactersPerGlyphBuffer = mVisualModel->mCharactersPerGlyph.Begin();
1506 Length numberOfCharacters = 0u;
1507 if( TextAbstraction::LATIN == script )
1509 // Prevents to jump the whole Latin ligatures like fi, ff, ...
1510 numberOfCharacters = 1u;
1514 GlyphIndex glyphIndex = *( charactersToGlyphBuffer + index );
1515 numberOfCharacters = *( charactersPerGlyphBuffer + glyphIndex );
1517 while( 0u == numberOfCharacters )
1519 numberOfCharacters = *( charactersPerGlyphBuffer + glyphIndex );
1524 if( index < mEventData->mPrimaryCursorPosition )
1526 cursorIndex -= numberOfCharacters;
1530 cursorIndex += numberOfCharacters;
1536 void Controller::Impl::UpdateCursorPosition()
1538 DALI_LOG_INFO( gLogFilter, Debug::Verbose, "-->Controller::UpdateCursorPosition %p\n", this );
1539 if( NULL == mEventData )
1541 // Nothing to do if there is no text input.
1542 DALI_LOG_INFO( gLogFilter, Debug::Verbose, "<--Controller::UpdateCursorPosition no event data\n" );
1546 if( IsShowingPlaceholderText() )
1548 // Do not want to use the place-holder text to set the cursor position.
1550 // Use the line's height of the font's family set to set the cursor's size.
1551 // If there is no font's family set, use the default font.
1552 // Use the current alignment to place the cursor at the beginning, center or end of the box.
1554 float lineHeight = 0.f;
1556 FontId defaultFontId = 0u;
1557 if( NULL == mFontDefaults )
1559 defaultFontId = mFontClient.GetFontId( EMPTY_STRING,
1564 defaultFontId = mFontDefaults->GetFontId( mFontClient );
1567 Text::FontMetrics fontMetrics;
1568 mFontClient.GetFontMetrics( defaultFontId, fontMetrics );
1570 lineHeight = fontMetrics.ascender - fontMetrics.descender;
1573 Vector2 cursorPosition;
1575 switch( mLayoutEngine.GetHorizontalAlignment() )
1577 case LayoutEngine::HORIZONTAL_ALIGN_BEGIN:
1579 cursorPosition.x = 1.f;
1582 case LayoutEngine::HORIZONTAL_ALIGN_CENTER:
1584 cursorPosition.x = floor( 0.5f * mControlSize.width );
1587 case LayoutEngine::HORIZONTAL_ALIGN_END:
1589 cursorPosition.x = mControlSize.width;
1594 switch( mLayoutEngine.GetVerticalAlignment() )
1596 case LayoutEngine::VERTICAL_ALIGN_TOP:
1598 cursorPosition.y = 0.f;
1601 case LayoutEngine::VERTICAL_ALIGN_CENTER:
1603 cursorPosition.y = floorf( 0.5f * ( mControlSize.height - lineHeight ) );
1606 case LayoutEngine::VERTICAL_ALIGN_BOTTOM:
1608 cursorPosition.y = mControlSize.height - lineHeight;
1613 mEventData->mDecorator->SetPosition( PRIMARY_CURSOR,
1621 CursorInfo cursorInfo;
1622 GetCursorPosition( mEventData->mPrimaryCursorPosition,
1625 const Vector2 offset = mEventData->mScrollPosition + mAlignmentOffset;
1626 const Vector2 cursorPosition = cursorInfo.primaryPosition + offset;
1628 // Sets the cursor position.
1629 mEventData->mDecorator->SetPosition( PRIMARY_CURSOR,
1632 cursorInfo.primaryCursorHeight,
1633 cursorInfo.lineHeight );
1634 DALI_LOG_INFO( gLogFilter, Debug::Verbose, "Primary cursor position: %f,%f\n", cursorPosition.x, cursorPosition.y );
1636 // Sets the grab handle position.
1637 mEventData->mDecorator->SetPosition( GRAB_HANDLE,
1640 cursorInfo.lineHeight );
1642 if( cursorInfo.isSecondaryCursor )
1644 mEventData->mDecorator->SetActiveCursor( ACTIVE_CURSOR_BOTH );
1645 mEventData->mDecorator->SetPosition( SECONDARY_CURSOR,
1646 cursorInfo.secondaryPosition.x + offset.x,
1647 cursorInfo.secondaryPosition.y + offset.y,
1648 cursorInfo.secondaryCursorHeight,
1649 cursorInfo.lineHeight );
1650 DALI_LOG_INFO( gLogFilter, Debug::Verbose, "Secondary cursor position: %f,%f\n", cursorInfo.secondaryPosition.x + offset.x, cursorInfo.secondaryPosition.y + offset.y );
1654 mEventData->mDecorator->SetActiveCursor( ACTIVE_CURSOR_PRIMARY );
1657 DALI_LOG_INFO( gLogFilter, Debug::Verbose, "<--Controller::UpdateCursorPosition\n" );
1660 void Controller::Impl::UpdateSelectionHandle( HandleType handleType )
1662 if( ( LEFT_SELECTION_HANDLE != handleType ) &&
1663 ( RIGHT_SELECTION_HANDLE != handleType ) )
1668 const bool leftSelectionHandle = LEFT_SELECTION_HANDLE == handleType;
1669 const CharacterIndex index = leftSelectionHandle ? mEventData->mLeftSelectionPosition : mEventData->mRightSelectionPosition;
1671 CursorInfo cursorInfo;
1672 GetCursorPosition( index,
1675 const Vector2 offset = mEventData->mScrollPosition + mAlignmentOffset;
1676 const Vector2 cursorPosition = cursorInfo.primaryPosition + offset;
1678 // Sets the grab handle position.
1679 mEventData->mDecorator->SetPosition( handleType,
1682 cursorInfo.lineHeight );
1684 // If selection handle at start of the text and other at end of the text then all text is selected.
1685 const CharacterIndex startOfSelection = std::min( mEventData->mLeftSelectionPosition, mEventData->mRightSelectionPosition );
1686 const CharacterIndex endOfSelection = std::max ( mEventData->mLeftSelectionPosition, mEventData->mRightSelectionPosition );
1687 mEventData->mAllTextSelected = ( startOfSelection == 0 ) && ( endOfSelection == mLogicalModel->mText.Count() );
1690 void Controller::Impl::ClampHorizontalScroll( const Vector2& actualSize )
1692 // Clamp between -space & 0 (and the text alignment).
1693 if( actualSize.width > mControlSize.width )
1695 const float space = ( actualSize.width - mControlSize.width ) + mAlignmentOffset.x;
1696 mEventData->mScrollPosition.x = ( mEventData->mScrollPosition.x < -space ) ? -space : mEventData->mScrollPosition.x;
1697 mEventData->mScrollPosition.x = ( mEventData->mScrollPosition.x > -mAlignmentOffset.x ) ? -mAlignmentOffset.x : mEventData->mScrollPosition.x;
1699 mEventData->mDecoratorUpdated = true;
1703 mEventData->mScrollPosition.x = 0.f;
1707 void Controller::Impl::ClampVerticalScroll( const Vector2& actualSize )
1709 // Clamp between -space & 0 (and the text alignment).
1710 if( actualSize.height > mControlSize.height )
1712 const float space = ( actualSize.height - mControlSize.height ) + mAlignmentOffset.y;
1713 mEventData->mScrollPosition.y = ( mEventData->mScrollPosition.y < -space ) ? -space : mEventData->mScrollPosition.y;
1714 mEventData->mScrollPosition.y = ( mEventData->mScrollPosition.y > -mAlignmentOffset.y ) ? -mAlignmentOffset.y : mEventData->mScrollPosition.y;
1716 mEventData->mDecoratorUpdated = true;
1720 mEventData->mScrollPosition.y = 0.f;
1724 void Controller::Impl::ScrollToMakePositionVisible( const Vector2& position )
1727 bool updateDecorator = false;
1728 if( position.x < 0.f )
1730 offset.x = -position.x;
1731 mEventData->mScrollPosition.x += offset.x;
1732 updateDecorator = true;
1734 else if( position.x > mControlSize.width )
1736 offset.x = mControlSize.width - position.x;
1737 mEventData->mScrollPosition.x += offset.x;
1738 updateDecorator = true;
1741 if( updateDecorator && mEventData->mDecorator )
1743 mEventData->mDecorator->UpdatePositions( offset );
1746 // TODO : calculate the vertical scroll.
1749 void Controller::Impl::ScrollTextToMatchCursor()
1751 // Get the current cursor position in decorator coords.
1752 const Vector2& currentCursorPosition = mEventData->mDecorator->GetPosition( PRIMARY_CURSOR );
1754 // Calculate the new cursor position.
1755 CursorInfo cursorInfo;
1756 GetCursorPosition( mEventData->mPrimaryCursorPosition,
1759 // Calculate the offset to match the cursor position before the character was deleted.
1760 mEventData->mScrollPosition.x = currentCursorPosition.x - cursorInfo.primaryPosition.x - mAlignmentOffset.x;
1762 ClampHorizontalScroll( mVisualModel->GetActualSize() );
1764 const Vector2 offset = mEventData->mScrollPosition + mAlignmentOffset;
1765 const Vector2 cursorPosition = cursorInfo.primaryPosition + offset;
1767 // Sets the cursor position.
1768 mEventData->mDecorator->SetPosition( PRIMARY_CURSOR,
1771 cursorInfo.primaryCursorHeight,
1772 cursorInfo.lineHeight );
1774 // Sets the grab handle position.
1775 mEventData->mDecorator->SetPosition( GRAB_HANDLE,
1778 cursorInfo.lineHeight );
1780 if( cursorInfo.isSecondaryCursor )
1782 mEventData->mDecorator->SetPosition( SECONDARY_CURSOR,
1783 cursorInfo.secondaryPosition.x + offset.x,
1784 cursorInfo.secondaryPosition.y + offset.y,
1785 cursorInfo.secondaryCursorHeight,
1786 cursorInfo.lineHeight );
1787 DALI_LOG_INFO( gLogFilter, Debug::Verbose, "Secondary cursor position: %f,%f\n", cursorInfo.secondaryPosition.x + offset.x, cursorInfo.secondaryPosition.y + offset.y );
1790 // Set which cursors are active according the state.
1791 if( ( EventData::EDITING == mEventData->mState ) ||
1792 ( EventData::EDITING_WITH_POPUP == mEventData->mState ) ||
1793 ( EventData::GRAB_HANDLE_PANNING == mEventData->mState ) )
1795 if( cursorInfo.isSecondaryCursor )
1797 mEventData->mDecorator->SetActiveCursor( ACTIVE_CURSOR_BOTH );
1801 mEventData->mDecorator->SetActiveCursor( ACTIVE_CURSOR_PRIMARY );
1806 mEventData->mDecorator->SetActiveCursor( ACTIVE_CURSOR_NONE );
1810 void Controller::Impl::RequestRelayout()
1812 mControlInterface.RequestTextRelayout();
1817 } // namespace Toolkit