getEdgeValues static method

List<String?>? getEdgeValues(String shorthandProperty, { bool isLengthOrPercentage = false, bool isNonNegativeLengthOrPercentage = false, bool isNonNegativeLength = false, })

Implementation

static List<String?>? getEdgeValues(
  String shorthandProperty, {
  bool isLengthOrPercentage = false,
  bool isNonNegativeLengthOrPercentage = false,
  bool isNonNegativeLength = false,
}) {
  List<String> properties = _splitBySpace(shorthandProperty);

  String? topValue;
  String? rightValue;
  String? bottomValue;
  String? leftValue;

  if (properties.length == 1) {
    topValue = rightValue = bottomValue = leftValue = properties[0];
  } else if (properties.length == 2) {
    topValue = bottomValue = properties[0];
    leftValue = rightValue = properties[1];
  } else if (properties.length == 3) {
    topValue = properties[0];
    rightValue = leftValue = properties[1];
    bottomValue = properties[2];
  } else if (properties.length == 4) {
    topValue = properties[0];
    rightValue = properties[1];
    bottomValue = properties[2];
    leftValue = properties[3];
  }

  if (topValue == null || rightValue == null || bottomValue == null || leftValue == null) {
    return null;
  }

  if (isLengthOrPercentage) {
    if ((!CSSLength.isLength(topValue) && !CSSPercentage.isPercentage(topValue) && !CSSFunction.isFunction(topValue)) ||
        (!CSSLength.isLength(rightValue) && !CSSPercentage.isPercentage(rightValue)  && !CSSFunction.isFunction(rightValue)) ||
        (!CSSLength.isLength(bottomValue) && !CSSPercentage.isPercentage(bottomValue) && !CSSFunction.isFunction(bottomValue)) ||
        (!CSSLength.isLength(leftValue) && !CSSPercentage.isPercentage(leftValue)) && !CSSFunction.isFunction(leftValue)) {
      return null;
    }
  } else if (isNonNegativeLengthOrPercentage) {
    if ((!CSSLength.isNonNegativeLength(topValue) && !CSSPercentage.isNonNegativePercentage(topValue) && !CSSFunction.isFunction(topValue)) ||
        (!CSSLength.isNonNegativeLength(rightValue) && !CSSPercentage.isNonNegativePercentage(rightValue) && !CSSFunction.isFunction(rightValue)) ||
        (!CSSLength.isNonNegativeLength(bottomValue) && !CSSPercentage.isNonNegativePercentage(bottomValue) && !CSSFunction.isFunction(bottomValue)) ||
        (!CSSLength.isNonNegativeLength(leftValue) && !CSSPercentage.isNonNegativePercentage(leftValue) && !CSSFunction.isFunction(leftValue))) {
      return null;
    }
  } else if (isNonNegativeLength) {
    if ((!CSSLength.isNonNegativeLength(topValue) && !CSSFunction.isFunction(topValue)) ||
        (!CSSLength.isNonNegativeLength(rightValue) && !CSSFunction.isFunction(rightValue)) ||
        (!CSSLength.isNonNegativeLength(bottomValue) && !CSSFunction.isFunction(bottomValue)) ||
        (!CSSLength.isNonNegativeLength(leftValue) && !CSSFunction.isFunction(leftValue))) {
      return null;
    }
  }

  // Assume the properties are in the usual order top, right, bottom, left.
  return [topValue, rightValue, bottomValue, leftValue];
}