question: private String pickLowerOrUpper ( String inputMode ) { int pos = getCursorPosition ( ) - 1 ; if ( pendingCommit ) { pos -- ; } String text = getText ( ) ; if ( pos >= text . length ( ) ) { pos = text . length ( ) - 1 ; } while ( pos > - 1 ) { if ( text . charAt ( pos ) == '.' ) { return inputMode . toUpperCase ( ) ; } if ( text . charAt ( pos ) != ' ' ) { return inputMode . toLowerCase ( ) ; } pos -- ; } return inputMode . toUpperCase ( ) ; }
target:  Used for the case of first sentence character should be upper case