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https://issues.apache.org/jira/browse/CAMEL-23818?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Claus Ibsen updated CAMEL-23818:
--------------------------------
Fix Version/s: 4.21.0
> camel tui: Actions menu (F2) leaves stray characters when scrolling over
> emoji rows
> -----------------------------------------------------------------------------------
>
> Key: CAMEL-23818
> URL: https://issues.apache.org/jira/browse/CAMEL-23818
> Project: Camel
> Issue Type: Bug
> Components: camel-jbang
> Affects Versions: 4.21.0
> Reporter: Adriano Machado
> Priority: Minor
> Fix For: 4.21.0
>
>
> h3. Summary
> In "camel tui", opening the Actions menu (F2) and scrolling through it with
> the
> arrow keys leaves stray characters on screen after closing the menu without
> selecting an action. The affected rows are "Start/Stop Tape Recording" and
> "Show Keystrokes": moving the selection over them shifts the text one column
> to
> the left and leaves leftover letters behind.
> h3. Root cause
> These are the only rows whose icon is an emoji presentation sequence (a
> text-default base glyph followed by Variation Selector-16, U+FE0F):
> * Start/Stop Tape Recording: U+23FA / U+23F9 + U+FE0F
> * Show/Hide Keystrokes: U+2328 + U+FE0F
> They render 2 columns wide in terminals, but the TUI library (TamboUI)
> measures
> them as 1 column: CharWidth.of(String) sums base(1)+VS16(0), and
> Buffer.setString
> places the glyph in a single cell without a continuation cell. The terminal's
> 2-wide glyph then drifts one column out of sync with the buffer, and the
> redraw
> diff leaves ghost characters. Rows using regular wide emoji are unaffected.
> h3. Fix
> Root cause fixed upstream in TamboUI:
> https://github.com/tamboui/tamboui/pull/388
> (base+VS16 now counts as width 2 and reserves a continuation cell).
> A temporary Camel-side workaround in ActionsPopup.renderActionsMenu swaps the
> three labels to unambiguous 2-wide emoji until a fixed TamboUI release is
> adopted
> (bump tamboui-version in parent/pom.xml), after which the workaround can be
> reverted.
> h3. Affects
> camel-jbang TUI (camel-jbang-plugin-tui), 4.21.0-SNAPSHOT
> _Reported by Claude Code on behalf of Adriano Machado._
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