Is there something akin to

.replace

that works on

TextFieldValue

(takes cursor / selection into account)? I'm trying to have forbidden characters (like @) in my

TextField

so I'm just doing

.replace("@", "")

inside

onValueChange

but this means the cursor will stay on the position of the removed character (i.e. behaves like "insert" key is on). I feel this is simple to solve, but just wanted to check if there's some builtin method I'm missing.

I guess you want to check the

VisualTransformation

and

OffsetMapping

https://developer.android.com/reference/kotlin/androidx/compose/ui/text/input/VisualTransformation

This wouldn't change the value though - just what the use sees. I want to ensure the invalid character(s) never reach my DB / backend.

Then I would pre-process the user’s input before it is persisted or send.

That's sort of what I'm doing - but then either I display the processed input (which is the issue I'm having, cursor position might end up wrong) or I show something different to the user

cursor position is TextFieldValue.selection = TextRange(myPosition)