question: public Shape modelToView ( int pos , Shape a , Position . Bias b ) throws BadLocationException { Rectangle alloc = a . getBounds ( ) ; RSyntaxTextArea textArea = ( RSyntaxTextArea ) getContainer ( ) ; alloc . height = textArea . getLineHeight ( ) ; alloc . width = 1 ; int p0 = getStartOffset ( ) ; int p1 = getEndOffset ( ) ; int testP = ( b == Position . Bias . Forward ) ? pos : Math . max ( p0 , pos - 1 ) ; RSyntaxDocument doc = ( RSyntaxDocument ) getDocument ( ) ; Element map = doc . getDefaultRootElement ( ) ; int line = map . getElementIndex ( p0 ) ; Token tokenList = doc . getTokenListForLine ( line ) ; float x0 = alloc . x ; while ( p0 < p1 ) { x0 = RSyntaxUtilities . makeTokenListStartAt ( tokenList , p0 , WrappedSyntaxView . this , textArea , x0 ) ; int p = calculateBreakPosition ( p0 , tokenList , x0 ) ; if ( ( pos >= p0 ) && ( testP < p ) ) { alloc = RSyntaxUtilities . getLineWidthUpTo ( textArea , s , p0 , pos , WrappedSyntaxView . this , alloc , alloc . x ) ; return alloc ; } if ( p == p1 - 1 && pos == p1 - 1 ) { if ( pos > p0 ) { alloc = RSyntaxUtilities . getLineWidthUpTo ( textArea , s , p0 , pos , WrappedSyntaxView . this , alloc , alloc . x ) ; } return alloc ; } p0 = ( p == p0 ) ? p1 : p ; alloc . y += alloc . height ; } throw new BadLocationException ( null , pos ) ; }
target:  Provides a mapping from the document model coordinate space to the coordinate space of the view mapped to it.