lineHeight property

CSSLengthValue get lineHeight

@override
CSSLengthValue get lineHeight {
  if (_lineHeight == null && getParentRenderStyle() != null) {
    // Inherit from parent. For percentage-specified line-height, freeze to the
    // parent’s used value (absolute px) so nested elements don’t amplify spacing
    // when their font-size differs. Unitless numbers (EM here) continue to inherit
    // as a multiplier to match CSS behavior.
    final CSSLengthValue parentLengthValue = getParentRenderStyle()!.lineHeight;
    if (parentLengthValue.type == CSSLengthType.PERCENTAGE) {
      // Resolve percentage against the parent’s own font-size, then inherit as px.
      final double usedPx = parentLengthValue.computedValue;
      return CSSLengthValue(
          usedPx, CSSLengthType.PX, this, parentLengthValue.propertyName, parentLengthValue.axisType);
    }
    return CSSLengthValue(parentLengthValue.value, parentLengthValue.type, this, parentLengthValue.propertyName,
        parentLengthValue.axisType);
  }

  return _lineHeight ?? CSSText.DEFAULT_LINE_HEIGHT;
}

set lineHeight (CSSLengthValue? value)

set lineHeight(CSSLengthValue? value) {
  if (_lineHeight == value) return;
  _lineHeight = value;
  // Update all the children layout and text with specified style property not set due to style inheritance.
  _markNestChildrenTextAndLayoutNeedsLayout(this, LINE_HEIGHT);
}