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Posters wait while the selection moves quickly

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On a terminal zoomed far out a poster is tens of thousands of cells, and
redrawing it on every step of a held arrow key was more output than the
terminal could draw (about 100 KB per step at 600x180), so the list
lagged. A selection that changes again within 120 ms keeps the poster's
place empty and shows the poster once it rests.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019reK4DUGYqDUjniWYJvwUW
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nils
2026-10-21 11:31:51 +02:00
co-authored by Claude Opus 5.5
parent 080ef9ec8e
commit a71ca6e3fb
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CHANGELOG.md
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## Unreleased
- **Smooth scrolling on huge terminals:** while an arrow key is held, the poster waits until the
selection rests (120 ms). Every poster rewrites all of its cells, which on a terminal zoomed far
out was more output per step than the terminal could draw, so moving through a list lagged.
- **Posters in macOS Terminal:** Terminal.app draws the half and quarter blocks from the font, and
their halves do not meet at the middle of the cell, so posters looked like rows of shifted dots.
`auto` now draws them there as plain colored cells (new `ui.cover_style` value `cells`): coarser,