Inconsistent scaling with adjustsFontSizeToFit and numberOfLines=1

[zachasme]

Is this a bug report?

Yes

Have you read the Contributing Guidelines?

Yes

Environment

Environment:
OS: Linux 4.12
Node: 8.5.0
Yarn: 1.0.1
npm: 5.3.0
Watchman: 4.7.0
Xcode: N/A
Android Studio: Not Found

Packages: (wanted => installed)
react: 16.0.0-alpha.12 => 16.0.0-alpha.12
react-native: 0.48.4 => 0.48.4

Target Platform: iOS (9.3.5)

Steps to Reproduce

1. Create a Text element with adjustsFontSizeToFit and numberOfLines={1}
2. Put it in a View and set style={{flex: 1}} on both elements.

Expected Behavior

The paragraph inside the text element is adjusted to fit on a single line, with every word visible.

Actual Behavior

The paragraph is scaled to fit, but inconsistently. Sometimes the last word is cut off. Adding/removing a word sometimes fixes this. See screenshot.

Reproducible Demo

https://snack.expo.io/BkXvD4qjb

[zachasme]

For anyone else encountering this, as temporary workaround we're adding a regular space followed by a non-breaking space: <Text {...props}>Long Paragraph {"\u00a0"}</Text>.

[CharlieOrlando]

Finally found someone else with this issue! I have been searching like crazy to find an answer. Has anyone else found a solution besides the hacky workaround??

[iPrytz]

I'm also looking for a better solution for this, i've made a calculator where the text scales if the input is a big number. When it starts to scale, the last char is sometimes cut of :(

[chriscohoat]

I've been struggling for days on this and I believe the trick is to use a mono-spaced font family as well, like Helvetica Neue. Used in combination with @zachasme's fix everything seems to render properly.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Maybe the issue has been fixed in a recent release, or perhaps it is not affecting a lot of people. If you think this issue should definitely remain open, please let us know why. Thank you for your contributions.