cssExpression property

  1. @override
String get cssExpression

Returns the expression part of a CSS declaration. Declaration is:

property:expression;

E.g., if property is color then expression could be rgba(255,255,0) the CSS declaration would be 'color:rgba(255,255,0);'.

then _cssExpression would return 'rgba(255,255,0)'. See www.w3.org/TR/CSS21/grammar.html

Implementation

@override
String get cssExpression {
  return (top == left && bottom == right && top == right)
      ? '${left}px'
      : "${top != null ? '$top' : '0'}px "
          "${right != null ? '$right' : '0'}px "
          "${bottom != null ? '$bottom' : '0'}px "
          "${left != null ? '$left' : '0'}px";
}