Struggling with `LineHeightStyle.Mode.Minimum` of ...

# compose

[Landerl Young]

Struggling with LineHeightStyle.Mode.Minimum of BasicText, after diving into the source code, I found the LineHeightStyleSpan class, but the logic inside

override fun chooseHeight(...) {
    // some logic...

    if (firstAscent == Int.MIN_VALUE) { // why? only calculate for the first line?
        calculateTargetMetrics(fontMetricsInt)
    }

    fontMetricsInt.ascent = if (isFirstLine) firstAscent else ascent
    fontMetricsInt.descent = if (isLastLine) lastDescent else descent
}

really made me confused.

Why is there an if guard, theratically, the ParagraphStyleSpan::chooseHeight is called for every line of a paragraph.
Is this a BUG?

[Landerl Young]

What I'm doing is to workaround this issue https://kotlinlang.slack.com/archives/CJLTWPH7S/p1741651234253239 .
My project has set lineHeight and I want to set lineHeightStyle.mode to LineHeightStyle.Mode.Minimum workaround.