-struct Controller::TextInput
-{
- // Used to queue input events until DoRelayout()
- enum EventType
- {
- KEYBOARD_FOCUS_GAIN_EVENT,
- KEYBOARD_FOCUS_LOST_EVENT,
- CURSOR_KEY_EVENT,
- TAP_EVENT,
- PAN_EVENT,
- GRAB_HANDLE_EVENT
- };
-
- union Param
- {
- int mInt;
- unsigned int mUint;
- float mFloat;
- };
-
- struct Event
- {
- Event( EventType eventType )
- : type( eventType )
- {
- p1.mInt = 0;
- p2.mInt = 0;
- }
-
- EventType type;
- Param p1;
- Param p2;
- Param p3;
- };
-
- enum State
- {
- INACTIVE,
- SELECTING,
- EDITING,
- EDITING_WITH_POPUP
- };
-
- TextInput( LogicalModelPtr logicalModel,
- VisualModelPtr visualModel,
- DecoratorPtr decorator )
- : mLogicalModel( logicalModel ),
- mVisualModel( visualModel ),
- mDecorator( decorator ),
- mState( INACTIVE ),
- mPrimaryCursorPosition( 0u ),
- mSecondaryCursorPosition( 0u ),
- mDecoratorUpdated( false ),
- mCursorBlinkEnabled( true ),
- mGrabHandleEnabled( true ),
- mGrabHandlePopupEnabled( true ),
- mSelectionEnabled( true ),
- mHorizontalScrollingEnabled( true ),
- mVerticalScrollingEnabled( false ),
- mUpdateCursorPosition( false )
- {
- }
-
- /**
- * @brief Helper to move the cursor, grab handle etc.
- */
- bool ProcessInputEvents( const Vector2& controlSize,
- const Vector2& alignmentOffset )
- {
- mDecoratorUpdated = false;
-
- if( mDecorator )
- {
- for( vector<TextInput::Event>::iterator iter = mEventQueue.begin(); iter != mEventQueue.end(); ++iter )
- {
- switch( iter->type )
- {
- case KEYBOARD_FOCUS_GAIN_EVENT:
- {
- OnKeyboardFocus( true );
- break;
- }
- case KEYBOARD_FOCUS_LOST_EVENT:
- {
- OnKeyboardFocus( false );
- break;
- }
- case CURSOR_KEY_EVENT:
- {
- OnCursorKeyEvent( *iter );
- break;
- }
- case TAP_EVENT:
- {
- OnTapEvent( *iter, alignmentOffset );
- break;
- }
- case PAN_EVENT:
- {
- OnPanEvent( *iter, controlSize, alignmentOffset );
- break;
- }
- case GRAB_HANDLE_EVENT:
- {
- OnGrabHandleEvent( *iter );
- break;
- }
- }
- }
- }
-
- // The cursor must also be repositioned after inserts into the model
- if( mUpdateCursorPosition )
- {
- UpdateCursorPosition();
- mUpdateCursorPosition = false;
- }
-
- mEventQueue.clear();
-
- return mDecoratorUpdated;
- }
-
- void OnKeyboardFocus( bool hasFocus )
- {
- if( !hasFocus )
- {
- ChangeState( INACTIVE );
- }
- else
- {
- ChangeState( EDITING );
- }
- }
-
- void OnCursorKeyEvent( const Event& event )
- {
- int keyCode = event.p1.mInt;
-
- if( Dali::DALI_KEY_CURSOR_LEFT == keyCode )
- {
- // TODO
- }
- else if( Dali::DALI_KEY_CURSOR_RIGHT == keyCode )
- {
- // TODO
- }
- else if( Dali::DALI_KEY_CURSOR_UP == keyCode )
- {
- // TODO
- }
- else if( Dali::DALI_KEY_CURSOR_DOWN == keyCode )
- {
- // TODO
- }
- }
-
- void HandleCursorKey( int keyCode )
- {
- // TODO
- }
-
- void OnTapEvent( const Event& event,
- const Vector2& alignmentOffset )
- {
- unsigned int tapCount = event.p1.mUint;
-
- if( 1u == tapCount )
- {
- ChangeState( EDITING );
-
- float xPosition = event.p2.mFloat - alignmentOffset.x;
- float yPosition = event.p3.mFloat - alignmentOffset.y;
- float height(0.0f);
- GetClosestCursorPosition( mPrimaryCursorPosition, xPosition, yPosition, height );
- mDecorator->SetPosition( PRIMARY_CURSOR, xPosition, yPosition, height, height ); // TODO: To be fixed in the next patch.
- mUpdateCursorPosition = false;
-
- mDecoratorUpdated = true;
- }
- else if( mSelectionEnabled &&
- 2u == tapCount )
- {
- ChangeState( SELECTING );
-
- RepositionSelectionHandles( event.p2.mFloat, event.p3.mFloat );
- }
- }
-
- void OnPanEvent( const Event& event,
- const Vector2& controlSize,
- const Vector2& alignmentOffset )
- {
- int state = event.p1.mInt;
-
- if( Gesture::Started == state ||
- Gesture::Continuing == state )
- {
- const Vector2& actualSize = mVisualModel->GetActualSize();
-
- if( mHorizontalScrollingEnabled )
- {
- const float displacementX = event.p2.mFloat;
- mScrollPosition.x += displacementX;
-
- // Clamp between -space & 0 (and the text alignment).
- const float contentWidth = actualSize.width;
- if( contentWidth > controlSize.width )
- {
- const float space = ( contentWidth - controlSize.width ) + alignmentOffset.x;
- mScrollPosition.x = ( mScrollPosition.x < -space ) ? -space : mScrollPosition.x;
- mScrollPosition.x = ( mScrollPosition.x > -alignmentOffset.x ) ? -alignmentOffset.x : mScrollPosition.x;
-
- mDecoratorUpdated = true;
- }
- else
- {
- mScrollPosition.x = 0.f;
- }
- }
-
- if( mVerticalScrollingEnabled )
- {
- const float displacementY = event.p3.mFloat;
- mScrollPosition.y += displacementY;
-
- // Clamp between -space & 0 (and the text alignment).
- if( actualSize.height > controlSize.height )
- {
- const float space = ( actualSize.height - controlSize.height ) + alignmentOffset.y;
- mScrollPosition.y = ( mScrollPosition.y < -space ) ? -space : mScrollPosition.y;
- mScrollPosition.y = ( mScrollPosition.y > -alignmentOffset.y ) ? -alignmentOffset.y : mScrollPosition.y;
-
- mDecoratorUpdated = true;
- }
- else
- {
- mScrollPosition.y = 0.f;
- }
- }
- }
- }
-
- void OnGrabHandleEvent( const Event& event )
- {
- unsigned int state = event.p1.mUint;
-
- if( GRAB_HANDLE_PRESSED == state )
- {
- float xPosition = event.p2.mFloat;
- float yPosition = event.p3.mFloat;
- float height(0.0f);
-
- GetClosestCursorPosition( mPrimaryCursorPosition, xPosition, yPosition, height );
-
- mDecorator->SetPosition( PRIMARY_CURSOR, xPosition, yPosition, height, height ); // TODO: To be fixed in the next patch.
-
- //mDecorator->HidePopup();
- ChangeState ( EDITING );
- mDecoratorUpdated = true;
- }
- else if ( mGrabHandlePopupEnabled &&
- GRAB_HANDLE_RELEASED == state )
- {
- //mDecorator->ShowPopup();
- ChangeState ( EDITING_WITH_POPUP );
- mDecoratorUpdated = true;
- }
- }
-
- void RepositionSelectionHandles( float visualX, float visualY )
- {
- // TODO - Find which word was selected
-
- const Vector<GlyphInfo>& glyphs = mVisualModel->mGlyphs;
- const Vector<Vector2>::SizeType glyphCount = glyphs.Count();
-
- const Vector<Vector2>& positions = mVisualModel->mGlyphPositions;
- const Vector<Vector2>::SizeType positionCount = positions.Count();
-
- // Guard against glyphs which did not fit inside the layout
- const Vector<Vector2>::SizeType count = (positionCount < glyphCount) ? positionCount : glyphCount;
-
- if( count )
- {
- float primaryX = positions[0].x;
- float secondaryX = positions[count-1].x + glyphs[count-1].width;
-
- // TODO - multi-line selection
- const Vector<LineRun>& lines = mVisualModel->mLines;
- float height = lines.Count() ? lines[0].ascender + -lines[0].descender : 0.0f;
-
- mDecorator->SetPosition( PRIMARY_SELECTION_HANDLE, primaryX, 0.0f, height );
- mDecorator->SetPosition( SECONDARY_SELECTION_HANDLE, secondaryX, 0.0f, height );
-
- mDecorator->ClearHighlights();
- mDecorator->AddHighlight( primaryX, 0.0f, secondaryX, height );
- }
- }
-
- void ChangeState( State newState )
- {
- if( mState != newState )
- {
- mState = newState;
-
- if( INACTIVE == mState )
- {
- mDecorator->SetActiveCursor( ACTIVE_CURSOR_NONE );
- mDecorator->StopCursorBlink();
- mDecorator->SetGrabHandleActive( false );
- mDecorator->SetSelectionActive( false );
- mDecorator->SetPopupActive( false );
- mDecoratorUpdated = true;
- }
- else if ( SELECTING == mState )
- {
- mDecorator->SetActiveCursor( ACTIVE_CURSOR_NONE );
- mDecorator->StopCursorBlink();
- mDecorator->SetGrabHandleActive( false );
- mDecorator->SetSelectionActive( true );
- mDecoratorUpdated = true;
- }
- else if( EDITING == mState )
- {
- mDecorator->SetActiveCursor( ACTIVE_CURSOR_PRIMARY );
- if( mCursorBlinkEnabled )
- {
- mDecorator->StartCursorBlink();
- }
- if( mGrabHandleEnabled )
- {
- mDecorator->SetGrabHandleActive( true );
- }
- if( mGrabHandlePopupEnabled )
- {
- mDecorator->SetPopupActive( false );
- }
- mDecorator->SetSelectionActive( false );
- mDecoratorUpdated = true;
- }
- else if( EDITING_WITH_POPUP == mState )
- {
- mDecorator->SetActiveCursor( ACTIVE_CURSOR_PRIMARY );
- if( mCursorBlinkEnabled )
- {
- mDecorator->StartCursorBlink();
- }
- if( mGrabHandleEnabled )
- {
- mDecorator->SetGrabHandleActive( true );
- }
- if( mGrabHandlePopupEnabled )
- {
- mDecorator->SetPopupActive( true );
- }
- mDecorator->SetSelectionActive( false );
- mDecoratorUpdated = true;
- }
- }
- }
-
- LineIndex GetClosestLine( float y )
- {
- LineIndex lineIndex( 0u );
-
- const Vector<LineRun>& lines = mVisualModel->mLines;
- for( float totalHeight = 0; lineIndex < lines.Count(); ++lineIndex )
- {
- const LineRun& lineRun = lines[lineIndex];
- totalHeight += lineRun.ascender + -lineRun.descender;
- if( y < totalHeight )
- {
- return lineIndex;
- }
- }
-
- return lineIndex-1;
- }
-
- void GetClosestCursorPosition( CharacterIndex& logical, float& visualX, float& visualY, float& height )
- {
- Length numberOfGlyphs = mVisualModel->mGlyphs.Count();
- Length numberOfLines = mVisualModel->mLines.Count();
- if( 0 == numberOfGlyphs ||
- 0 == numberOfLines )
- {
- return;
- }
-
- // Transform to visual model coords
- visualX -= mScrollPosition.x;
- visualY -= mScrollPosition.y;
-
- // Find which line is closest
- LineIndex lineIndex( GetClosestLine( visualY ) );
-
- const Vector<GlyphInfo>& glyphs = mVisualModel->mGlyphs;
- const GlyphInfo* const glyphsBuffer = glyphs.Begin();
-
- const Vector<Vector2>& positions = mVisualModel->mGlyphPositions;
- const Vector2* const positionsBuffer = positions.Begin();
-
- unsigned int closestGlyph = 0;
- bool leftOfGlyph( false ); // which side of the glyph?
- float closestDistance = MAX_FLOAT;
-
- const LineRun& line = mVisualModel->mLines[lineIndex];
- GlyphIndex startGlyph = line.glyphIndex;
- GlyphIndex endGlyph = line.glyphIndex + line.numberOfGlyphs;
- DALI_ASSERT_DEBUG( endGlyph <= glyphs.Count() && "Invalid line info" );
-
- for( GlyphIndex i = startGlyph; i < endGlyph; ++i )
- {
- const GlyphInfo& glyphInfo = *( glyphsBuffer + i );
- const Vector2& position = *( positionsBuffer + i );
- float glyphX = position.x + glyphInfo.width*0.5f;
- float glyphY = position.y + glyphInfo.height*0.5f;
-
- float distanceToGlyph = fabsf( glyphX - visualX ) + fabsf( glyphY - visualY );
-
- if( distanceToGlyph < closestDistance )
- {
- closestDistance = distanceToGlyph;
- closestGlyph = i;
- leftOfGlyph = ( visualX < glyphX );
- }
- }
-
- // Calculate the logical position
- logical = mVisualModel->GetCharacterIndex( closestGlyph );
-
- // Returns the visual position of the glyph
- visualX = positions[closestGlyph].x;
- if( !leftOfGlyph )
- {
- visualX += glyphs[closestGlyph].width;
-
- //if( LTR ) TODO
- ++logical;
- }
- else// if ( RTL ) TODO
- {
- //++logical;
- }
- visualY = 0.0f;
-
- height = line.ascender + -line.descender;
- }
-
- void UpdateCursorPosition()
- {
- if( 0 == mVisualModel->mGlyphs.Count() )
- {
- return;
- }
-
- // FIXME GetGlyphIndex() is behaving strangely
-#if 0
- GlyphIndex cursorGlyph = mVisualModel->GetGlyphIndex( mPrimaryCursorPosition );
-#else
- GlyphIndex cursorGlyph( 0u );
- for( cursorGlyph = 0; cursorGlyph < mVisualModel->mGlyphs.Count(); ++cursorGlyph )
- {
- if( mPrimaryCursorPosition == mVisualModel->GetCharacterIndex( cursorGlyph ) )
- {
- break;
- }
- }
-#endif
-
- float visualX( 0.0f );
- float visualY( 0.0f );
- float height( 0.0f );
- const Vector<LineRun>& lineRuns = mVisualModel->mLines;
-
- if( cursorGlyph > 0 )
- {
- --cursorGlyph;
-
- visualX = mVisualModel->mGlyphPositions[ cursorGlyph ].x;
- //if( LTR ) TODO
- visualX += mVisualModel->mGlyphs[ cursorGlyph ].width;
-
- // Find the line height
- GlyphIndex lastGlyph( 0 );
- for( LineIndex lineIndex = 0u; lineIndex < lineRuns.Count(); ++lineIndex )
- {
- lastGlyph = (lineRuns[lineIndex].glyphIndex + lineRuns[lineIndex].numberOfGlyphs);
- if( cursorGlyph < lastGlyph )
- {
- const LineRun& lineRun = lineRuns[lineIndex];
- height = lineRun.ascender + -lineRun.descender;
- break;
- }
- }
- }
-
- mDecorator->SetPosition( PRIMARY_CURSOR, visualX, visualY, height, height ); // TODO: To be fixed in the next patch.
- mDecoratorUpdated = true;
- }
-
- LogicalModelPtr mLogicalModel;
- VisualModelPtr mVisualModel;
- DecoratorPtr mDecorator;
-
- std::string mPlaceholderText;
-
- /**
- * This is used to delay handling events until after the model has been updated.
- * The number of updates to the model is minimized to improve performance.
- */
- vector<Event> mEventQueue; ///< The queue of touch events etc.
-
- State mState; ///< Selection mode, edit mode etc.
-
- CharacterIndex mPrimaryCursorPosition; ///< Index into logical model for primary cursor
- CharacterIndex mSecondaryCursorPosition; ///< Index into logical model for secondary cursor
-
- /**
- * 0,0 means that the top-left corner of the layout matches the top-left corner of the UI control.
- * Typically this will have a negative value with scrolling occurs.
- */
- Vector2 mScrollPosition; ///< The text is offset by this position when scrolling.
-
- bool mDecoratorUpdated : 1; ///< True if the decorator was updated during event processing
- bool mCursorBlinkEnabled : 1; ///< True if cursor should blink when active
- bool mGrabHandleEnabled : 1; ///< True if grab handle is enabled
- bool mGrabHandlePopupEnabled : 1; ///< True if the grab handle popu-up should be shown
- bool mSelectionEnabled : 1; ///< True if selection handles, highlight etc. are enabled
- bool mHorizontalScrollingEnabled : 1; ///< True if horizontal scrolling is enabled
- bool mVerticalScrollingEnabled : 1; ///< True if vertical scrolling is enabled
- bool mUpdateCursorPosition : 1; ///< True if the visual position of the cursor must be recalculated
-};
-
-struct Controller::FontDefaults
-{
- FontDefaults()
- : mDefaultPointSize(0.0f),
- mFontId(0u)
- {
- }
-
- FontId GetFontId( TextAbstraction::FontClient& fontClient )
- {
- if( !mFontId )
- {
- Dali::TextAbstraction::PointSize26Dot6 pointSize = mDefaultPointSize*64;
- mFontId = fontClient.GetFontId( mDefaultFontFamily, mDefaultFontStyle, pointSize );
- }
-
- return mFontId;
- }
-
- std::string mDefaultFontFamily;
- std::string mDefaultFontStyle;
- float mDefaultPointSize;
- FontId mFontId;
-};
-
-struct Controller::Impl
-{
- Impl( ControlInterface& controlInterface )
- : mControlInterface( controlInterface ),
- mLogicalModel(),
- mVisualModel(),
- mFontDefaults( NULL ),
- mTextInput( NULL ),
- mFontClient(),
- mView(),
- mLayoutEngine(),
- mModifyEvents(),
- mControlSize(),
- mAlignmentOffset(),
- mOperationsPending( NO_OPERATION ),
- mRecalculateNaturalSize( true )
- {
- mLogicalModel = LogicalModel::New();
- mVisualModel = VisualModel::New();
-
- mFontClient = TextAbstraction::FontClient::Get();
-
- mView.SetVisualModel( mVisualModel );
-
- // Set the text properties to default
- mVisualModel->SetTextColor( Color::WHITE );
- mVisualModel->SetShadowOffset( Vector2::ZERO );
- mVisualModel->SetShadowColor( Vector4::ZERO );
- mVisualModel->SetUnderlineEnabled( false );
- }
-
- ~Impl()
- {
- delete mTextInput;
- }
-
- ControlInterface& mControlInterface; ///< Reference to the text controller.
- LogicalModelPtr mLogicalModel; ///< Pointer to the logical model.
- VisualModelPtr mVisualModel; ///< Pointer to the visual model.
- FontDefaults* mFontDefaults; ///< Avoid allocating this when the user does not specify a font.
- Controller::TextInput* mTextInput; ///< Avoid allocating everything for text input until EnableTextInput().
- TextAbstraction::FontClient mFontClient; ///< Handle to the font client.
- View mView; ///< The view interface to the rendering back-end.
- LayoutEngine mLayoutEngine; ///< The layout engine.
- std::vector<ModifyEvent> mModifyEvents; ///< Temporary stores the text set until the next relayout.
- Size mControlSize; ///< The size of the control.
- Vector2 mAlignmentOffset; ///< Vertical and horizontal offset of the whole text inside the control due to alignment.
- OperationsMask mOperationsPending; ///< Operations pending to be done to layout the text.
- bool mRecalculateNaturalSize:1; ///< Whether the natural size needs to be recalculated.
-};
-