Autolinker does not check character types they are not allowed in IDN domain name

[tateisu]

Steps to reproduce

Send message such as それそれ＞はじめよう.みんな

• それそれ is usual Japanese text.
• ＞ is U+FF1E, FULLWIDTH GREATER-THAN SIGN, Often used to identify the context of a sentence.
• はじめよう.みんな is IDN domain name.

The words in sentence are not separated by space, it's standard in Japanese language. But the speaker clearly separates the domain name and the sentence with ＞ .

Outcome

What did you expect?

In element-desktop, only はじめよう.みんな was autolinked. this is correct.

What happened instead?

In element-android, all of それそれ＞はじめよう.みんな was autolinked.

seems Android version's autolinker does not check character types that not allowed for IDN domain name.

Your phone model

Galaxy S10+

Operating system version

Android 12

Application version and app store

Element-Android 1.4.16 [40104162] (G-b8288)

Homeserver

mastodon.juggler.jp

Will you send logs?

No

Are you willing to provide a PR?

No

[ouchadam]

@tateisu thanks for raising, do you have examples of other apps that correctly handle the autolinking?

[tateisu]

Twitter and Mastodon (both does server side markup) ignores IDN domain instead of invalid autolink. I think it's also reasonable solution.