PasswordVisualTransformation from Jetpack Compose

PasswordVisualTransformation.kt

class PasswordVisualTransformation(val mask: Char = '\u2022') : VisualTransformation {
    override fun filter(text: AnnotatedString): TransformedText {
        return TransformedText(
            text = AnnotatedString(mask.toString().repeat(text.text.length)),
            offsetMapping = object : OffsetMapping {
              
                override fun originalToTransformed(offset: Int): Int = offset
              
                override fun transformedToOriginal(offset: Int): Int = offset
            }
        )
    }
}