Theme-Dimens.kt

@Composable
fun ProvideDimens(
    dimensions: Dimensions,
    content: @Composable () -> Unit
) {
    val dimensionSet = remember { dimensions }
    CompositionLocalProvider(LocalAppDimens provides dimensionSet, content = content)
}

private val LocalAppDimens = staticCompositionLocalOf {
    smallDimensions
}

@Composable
fun AppTheme(
    darkTheme: Boolean = isSystemInDarkTheme(),
    content: @Composable () -> Unit
) {
    val colors = if (darkTheme) DarkThemeColors else LightThemeColors
    val configuration = LocalConfiguration.current
    val dimensions = if (configuration.screenWidthDp <= 360) smallDimensions else sw360Dimensions
    val typography = if (configuration.screenWidthDp <= 360) smallTypography else sw360Typography

    ProvideDimens(dimensions = dimensions) {
        ProvideColors(colors = colors) {
            MaterialTheme(
                colors = colors,
                shapes = Shapes,
                typography = typography,
                content = content,
            )
        }
    }
}

object AppTheme {
    val colors: Colors
        @Composable
        get() = LocalAppColors.current

    val dimens: Dimensions
        @Composable
        get() = LocalAppDimens.current
}

val Dimens: Dimensions
    @Composable
    get() = AppTheme.dimens