[vim/vim] Wrap pum_redraw() in synchronized output to avoid flicker (PR #19955)

[mattn]

pum_redraw() calls update_screen(0) internally, which flushes at its BSU/ESU boundary. The popup cells are drawn after that flush, so the terminal briefly shows the screen with the pum area cleared. Bracket pum_redraw() in TERM_SYNC_OUTPUT_ENABLE/DISABLE so the whole frame is delivered atomically.

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You can view, comment on, or merge this pull request online at:

  https://github.com/vim/vim/pull/19955

Commit Summary

• 10ada7b Wrap pum_redraw() in synchronized output to avoid flicker

File Changes

(1 file)

• M src/popupmenu.c (6)

Patch Links:

• https://github.com/vim/vim/pull/19955.patch
• https://github.com/vim/vim/pull/19955.diff

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