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fix: correctly wrap history items (#1685)

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The overall idea here is: skip ratatui for writing into scrollback,
because its primitives are wrong. We want to render full lines of text,
that will be wrapped natively by the terminal, and which we never plan
to update using ratatui (so the `Buffer` struct is overhead and in fact
an inhibition).

Instead, we use ANSI scrolling regions (link reference doc to come).
Essentially, we:
1. Define a scrolling region that extends from the top of the prompt
area all the way to the top of scrollback
2. Scroll that region up by N < (screen_height - viewport_height) lines,
in this PR N=1
3. Put our cursor at the top of the newly empty region
4. Print out our new text like normal

The terminal interactions here (write_spans and its dependencies) are
mostly extracted from ratatui.
This commit is contained in:
Jeremy Rose
2025-07-28 07:45:49 -07:00
committed by GitHub
parent 2405c40026
commit 7ecd3153a8
4 changed files with 208 additions and 209 deletions
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codex-rs/Cargo.lock generated
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