is it possible to make Text() font size fixed (not...

# compose

[Peter Mandeljc]

is it possible to make Text() font size fixed (not scale with font scale)?

[Zach Klippenstein (he/him) [MOD]]

Assuming you have a really good reason for breaking this accessibility feature, I think you could just provide a LocalDensity that always sets the font scale to 1.

[Peter Mandeljc]

yeah, I have a valid use case for fixed size, thanks for the concern. I will give that a go, thanks!

[Peter Mandeljc]

I guess it only scales with "display scale", but with "font scale" it should be fixed?

[Jonas]

@Composable
fun FontScaleLimitProvider(maxFontScale: Float, content: @Composable () -> Unit) {
    val localDensity = LocalDensity.current
    if (localDensity.fontScale < maxFontScale) {
        content()
    } else {
        val newDensity = Density(fontScale = maxFontScale, density = localDensity.density)
        CompositionLocalProvider(LocalDensity provides newDensity) {
            content()
        }
    }
}

We do basically the same for really limited use cases and it works fine…

[Utkarsh Tiwari]

I figured the reason why the font was still scaling despite the CompositionLocalProvider density. It’s because I was using dimensionResource(id = <http://R.dimen.xyz|R.dimen.xyz>) to read the values which internally scales the raw value to TextUnit.

To solve this this is what I did:

@Composable
private fun getRawDimensionInDp(@DimenRes id: Int): Float {
    val context = LocalContext.current
    val value = TypedValue()
    context.resources.getValue(id, value, true)
    return TypedValue.complexToFloat(value.data)
}

@Composable
private fun getResolvedFontSize(@DimenRes id: Int): TextUnit {
    getRawDimensionInDp(id = id).sp
}

Here I am reading the value as it is, meaning that 12.dp from dimens.xml will be read as 12.0 and then I convert it to 12.0.sp which enforces the scaling.