lineHeightForTextScaler function

double lineHeightForTextScaler(
  1. TextScaler textScaler,
  2. TextStyle style
)

Height of one line of style as laid out: the font size, the text scale, and the line height the theme sets per font.

Use it to size a box that holds one line of text. 1.5 is only for styles with no height.

Implementation

double lineHeightForTextScaler(TextScaler textScaler, TextStyle style) =>
    textScaler.scale(style.fontSize!) * (style.height ?? 1.5);