irisandClaude Opus 5
76fcbdccb9
The last place in iris that corrected itself on a later frame, and the item docs/IRIS_TODO.md carried from the Scroll change. Iris's rule: "nothing in the framework should ever self heal because it should not be drawn incorrectly in the first place. If you need 2 draws to get something into the correct position then that should happen within the same frame." `clamp_to_content` measured the gap past the end of the content from the edges the walk had just placed, wrote it to the anchor and asked for another frame -- so one frame was drawn with the list past its own end, and a fling that had already stopped was not going to ask for the frame that fixed it. Now the walk outward from the anchor is `List::lay_out`, `overscroll_gap` is a pure measurement of the same gap (no painter, no redraw handle), and `draw` moves the anchor and walks a second time inside the same frame. One further pass always settles it: the gap comes from the edges the first walk placed, so moving the anchor by it puts that edge exactly on the viewport's, and the opposite end can only open a new gap when the content is shorter than the viewport, which `overscroll_gap` declines to touch. The second walk is paid only on an overscrolled frame and re-offers every row the same cached-height box at a new offset, which `draw_inner` dispatches as an O(1) move. `Painter::draw_again` had no other caller and is removed with it, so the framework no longer offers a way to ask for a corrective frame at all. Simplification in the same change: a placement is one pinned edge plus a height, so `Placement::edges(height)` gives the box and `place`'s top-known and bottom-known cases stop being two copies of the same arithmetic -- four match arms down to two. Four tests draw no settling frame on purpose and fail without the change: `fling_toward_the_start_stops_at_the_first_row` and the new `scrolling_past_the_start_is_given_back_in_the_same_frame` (list.rs), and `scrolling_past_the_first_row_settles_on_it` / `scrolling_past_the_last_row_settles_on_it` (layer 1, top_edge.rs). Verified: cargo fmt --check, clippy --workspace --all-targets clean, cargo test --workspace and ./run-tests.sh green, the phone-shaped headless window replaying flick-120hz.touch draws the transcript correctly, and the arm64 release APK builds. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>