[vim/vim] fix(tabpanel): prevent flicker when scrolling edit buffer (PR #19832)

[mattn]

When a vertical tabpanel is visible, terminal scroll operations in
win_do_lines() affect the full screen width, corrupting the tabpanel
area momentarily. The tabpanel is then redrawn via redraw_tabpanel,
causing visible flicker.

Return FAIL from win_do_lines() when tabpanel_width() > 0 to force
line-by-line redraw instead, analogous to the existing popup_visible
check. The check is placed after clear_cmdline is set to ensure the
command line is properly cleared during scroll.

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

  https://github.com/vim/vim/pull/19832

Commit Summary

• 4954bdb fix(tabpanel): prevent flicker when scrolling edit buffer

File Changes

(1 file)

• M src/screen.c (7)

Patch Links:

• https://github.com/vim/vim/pull/19832.patch
• https://github.com/vim/vim/pull/19832.diff

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[Christian Brabandt]

chrisbra left a comment (vim/vim#19832)

thanks

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[Christian Brabandt]

Closed #19832 via f6e1dd1.

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