Text in the composer is very small when device font size is minimum

[lanitochka17]

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Version Number: 1.4-36.0
Reproducible in staging?: Y
Reproducible in production?: N
If this was caught during regression testing, add the test name, ID and link from TestRail:
Email or phone of affected tester (no customers):
Logs: https://stackoverflow.com/c/expensify/questions/4856
Expensify/Expensify Issue URL:
Issue reported by: Applause - Internal Team
Slack conversation:

Action Performed:

Precondition: Device font size is set to minimum

1. Launch New Expensify app
2. Open any chat
3. Type in the composer
4. Send it

Expected Result:

The text in the composer has the same size as the text in the chat

Actual Result:

The text in the composer is smaller than the text in the chat

Workaround:

Unknown

Platforms:

Which of our officially supported platforms is this issue occurring on?

• Android: Native
• Android: mWeb Chrome
• iOS: Native
• iOS: mWeb Safari
• MacOS: Chrome / Safari
• MacOS: Desktop

Screenshots/Videos

Add any screenshot/video evidence

Bug6366898_1707065880367.Screen_Recording_20240203_033427_New_Expensify.mp4

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[github-actions]

👋 Friendly reminder that deploy blockers are time-sensitive ⏱ issues! Check out the open `StagingDeployCash` deploy checklist to see the list of PRs included in this release, then work quickly to do one of the following:

1. Identify the pull request that introduced this issue and revert it.
2. Find someone who can quickly fix the issue.
3. Fix the issue yourself.

[melvin-bot]

Triggered auto assignment to @grgia (Engineering), see https://stackoverflowteams.com/c/expensify/questions/9980/ for more details.

[lanitochka17]

We think that this bug might be related to #vip-vsp
CC @quinthar

[mountiny]

Not a blocker. @lanitochka17 how does this behave in production?

[kavimuru]

@mountiny this is the video from production

Screen_Recording_20240203_033512_Settings.mp4

[mountiny]

cc @tomekzaw @thienlnam this might be related to the live markdown feature

[thienlnam]

Looks like this is applicable to iOS as well https://expensify.slack.com/archives/C049HHMV9SM/p1707328995049399

I'll go ahead and take this over

[thienlnam]

@tomekzaw Are we able to scale back the font size from the setting a bit? It seems to be much smaller than iMessage

Here's iOS at the smallest font size from @AndrewGable

[tomekzaw]

Thanks for reporting this issue. I think we use original fontSize passed via styles but obviously this needs investigation since it changes the behavior of the composer.

[tomekzaw]

Should be fixed with #35973.

The root cause of the issue was missing allowFontScaling={false} property.

Expensify app uses its own logic for font scaling so it disables operating system scaling.

Previously, composer would use RNTextInput which is a thin wrapper over built-in TextInput but with allowFontScaling={false} and some other properties already set.

In #34292, I replaced RNTextInput with MarkdownTextInput directly without any wrappers so allowFontScaling={false} property is not set. PR #35973 restores the wrapper.

cc @thienlnam

[thienlnam]

PR in review

[melvin-bot]

@tomekzaw, @thienlnam, @thesahindia Huh... This is 4 days overdue. Who can take care of this?

[tomekzaw]

Fixed in #35973.