-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
- };
-
- TextInput( LogicalModelPtr logicalModel,
- VisualModelPtr visualModel,
- DecoratorPtr decorator )
- : mLogicalModel( logicalModel ),
- mVisualModel( visualModel ),
- mDecorator( decorator ),
- mState( INACTIVE ),
- mPrimaryCursorPosition( 0u ),
- mSecondaryCursorPosition( 0u ),
- mDecoratorUpdated( false ),
- mCursorBlinkEnabled( true ),
- mGrabHandleEnabled( false ),
- mGrabHandlePopupEnabled( false ),
- mSelectionEnabled( false ),
- mHorizontalScrollingEnabled( true ),
- mVerticalScrollingEnabled( false ),
- mUpdateCursorPosition( false )
- {
- }
-
- /**
- * @brief Helper to move the cursor, grab handle etc.
- */
- bool ProcessInputEvents( const Vector2& controlSize )
- {
- 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 );
- break;
- }
- case PAN_EVENT:
- {
- OnPanEvent( *iter, controlSize );
- 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 )
- {
- unsigned int tapCount = event.p1.mUint;
-
- if( 1u == tapCount )
- {
- ChangeState( EDITING );
-
- 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 );
- mUpdateCursorPosition = false;
-
- mDecoratorUpdated = true;
- }
- else if( mSelectionEnabled &&
- 2u == tapCount )
- {
- ChangeState( SELECTING );
- }
- }
-
- void OnPanEvent( const Event& event, const Vector2& controlSize )
- {
- int state = event.p1.mInt;
-
- if( Gesture::Started == state ||
- Gesture::Continuing == state )
- {
- const Vector2& actualSize = mVisualModel->GetActualSize();
-
- if( mHorizontalScrollingEnabled )
- {
- float displacementX = event.p2.mFloat;
- mScrollPosition.x += displacementX;
-
- // Clamp between -space & 0
- float contentWidth = actualSize.width;
- float space = (contentWidth > controlSize.width) ? contentWidth - controlSize.width : 0.0f;
- mScrollPosition.x = ( mScrollPosition.x < -space ) ? -space : mScrollPosition.x;
- mScrollPosition.x = ( mScrollPosition.x > 0 ) ? 0 : mScrollPosition.x;
-
- mDecoratorUpdated = true;
- }
- if( mVerticalScrollingEnabled )
- {
- float displacementY = event.p3.mFloat;
- mScrollPosition.y += displacementY;
-
- // Clamp between -space & 0
- float space = (actualSize.height > controlSize.height) ? actualSize.height - controlSize.height : 0.0f;
- mScrollPosition.y = ( mScrollPosition.y < -space ) ? -space : mScrollPosition.y;
- mScrollPosition.y = ( mScrollPosition.y > 0 ) ? 0 : mScrollPosition.y;
-
- mDecoratorUpdated = true;
- }
- }
- }
-
- 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 );
- mDecorator->HidePopup();
- mDecoratorUpdated = true;
- }
- else if ( mGrabHandlePopupEnabled &&
- GRAB_HANDLE_RELEASED == state )
- {
- mDecorator->ShowPopup();
- }
- }
-
- 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->HidePopup();
- 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 );
- }
- 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 )
- {
- totalHeight += lines[lineIndex].lineSize.height;
- if( y < totalHeight )
- {
- break;
- }
- }
-
- return lineIndex;
- }
-
- 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.lineSize.height;
- }
-
- 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 );
- LineIndex lineIndex( 0u );
- 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
- for( GlyphIndex lastGlyph = 0; lineIndex < lineRuns.Count(); ++lineIndex )
- {
- lastGlyph = (lineRuns[lineIndex].glyphIndex + lineRuns[lineIndex].numberOfGlyphs);
- if( cursorGlyph < lastGlyph )
- {
- break;
- }
- }
- }
-
- mDecorator->SetPosition( PRIMARY_CURSOR, visualX, visualY, lineRuns[lineIndex].lineSize.height );
- 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(),
- mOperationsPending( NO_OPERATION ),
- mRecalculateNaturalSize( true )
- {
- mLogicalModel = LogicalModel::New();
- mVisualModel = VisualModel::New();
-
- mFontClient = TextAbstraction::FontClient::Get();
-
- mView.SetVisualModel( mVisualModel );
- }
-
- ~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.
- OperationsMask mOperationsPending; ///< Operations pending to be done to layout the text.
- bool mRecalculateNaturalSize:1; ///< Whether the natural size needs to be recalculated.
-};
-