Jinwoo-H and Orca
e45331fd51
fix(terminal): stop phantom pinned-viewport pins from freezing follow-output
...
A pinnedViewport intent could latch while the viewport was still at the
bottom (sub-row trackpad wheel, wheel consumed by a mouse-reporting TUI,
plain PageUp/Home delivered to the app). Per-write-batch enforcement then
froze the viewport at that absolute line: during agent generation the live
TUI region visibly scrolled "underneath" static committed rows, and after a
long generation the scroll position sat near the top. Rebuild paths
(snapshot replay, fit reflow) additionally restored pinned positions by raw
pre-rebuild row numbers into renumbered buffers.
- The wheel/keyboard settle tick reclassifies intent from the real viewport
instead of preserving a pin the viewport never followed.
- Write capture treats a pinned intent whose live viewport is at the bottom
as followOutput, so a latched phantom pin can never freeze streaming.
- Visibility-resume enforcement follows output for pins recorded at the
bottom and restores by bottom offset when the buffer was rebuilt shorter.
- Snapshot replay restores by bottom offset; safeFit restores pinned panes
through an xterm marker so reflow renumbering cannot misplace them.
Deterministic repro harness: unit tests red on the old code for each latch/
freeze/restore shape, plus a stdin-phase-gated streaming e2e fixture — both
e2e tests fail without this fix and pass with it.
Co-authored-by: Orca <help@stably.ai >
2026-07-13 19:21:32 -04:00
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