material-components / material-components/material-components-android

[TextInputLayout] Scrollable prefix

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feature request Widget: TextField
Dominant language
Java
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Description

**Is your feature request related to a problem? Please describe.**
When using long `textPrefix`, prefix does not scroll.

**Describe the solution you'd like**
I would like to prefix and text scroll together, when text content is bigger than screen size.

Currently only text scrolls, prefix position is fixed.

**Describe alternatives you've considered**
I've managed to create a solution, that fits my needs, but includes:
- filtering text with InputFilter
- manipulating cursor (position, selection)
- using Spanned to color text

It's a bit annoying to implement on it's own.

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by locating the TextInputLayout implementation and its existing textPrefix and scrolling behavior. Reproduce the long-prefix case, then verify that the prefix and text scroll together when the content exceeds the screen size.

Written by the indexing model from the issue text.

Assessment

Tech stack
android, java
Domain
mobile
Issue type
Feature
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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