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fix: jump coverflow pager on far index changes - #1182
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📝 Walkthrough
Merge Risk: 🔵 Low · up to A restored session whose selected artwork is one page from the pager's initial position will animate rather than land immediately. This is a localized visual issue; otherwise the change is suitable to merge. Pre-merge checks |
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| Check name | Status | Explanation | Resolution |
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| Linked Issues check |  |
Issue #1196 requires adjacent runtime moves to animate and cold starts, restores, and distant selections to snap. The code in NowPlayingArtworkPager.kt snaps only when `abs(safeIndex - pagerState.cu… |
Distinguish the initial queue/index synchronization from a user or playback adjacent move. Snap the first valid queue index after cold start or restore, including index 1. Add an automated test for an empty-to-populated queue where the curr… |
| Docstring Coverage | |
Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 1 files. | Write docstrings for the functions missing them to satisfy the coverage threshold. |
✅ Passed checks (3 passed)
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Check name Status Explanation Out of Scope Changes check The reviewed change is limited to pager synchronization and scroll behavior in NowPlayingArtworkPager.kt. The change directly supports issue#1196by selecting animation for adjacent page changes an…Description Check Check skipped - CodeRabbit’s high-level summary is enabled. Title check The title clearly and concisely describes the main change: snapping the coverflow pager for distant index changes.
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Full details: Linked Issues check
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Explanation
Issue
#1196requires adjacent runtime moves to animate and cold starts, restores, and distant selections to snap. The code inNowPlayingArtworkPager.ktsnaps only whenabs(safeIndex - pagerState.currentPage) > 1. If the pager starts at page 0 while the queue loads withsafeIndex == 1, the code animates. That is a cold-start or restore transition, not an adjacent runtime move. Distant jumps of two or more pages do snap, and adjacent changes do animate.Resolution
Distinguish the initial queue/index synchronization from a user or playback adjacent move. Snap the first valid queue index after cold start or restore, including index 1. Add an automated test for an empty-to-populated queue where the current index is 1, and retain tests for adjacent animation and distant snapping.
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Actionable comments posted: 1
- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
Review comments at
@app/src/main/java/com/eddyizm/tempus/ui/components/NowPlayingArtworkPager.kt:
- Around line 76-87: Add an initialization or restore guard to the
LaunchedEffect keyed by safeIndex and count so the first valid queue-derived
selection uses pagerState.scrollToPage, even when it is adjacent to the current
page; apply the existing adjacent-track animation rule only to later selections.
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📒 Files selected for processing (1)
app/src/main/java/com/eddyizm/tempus/ui/components/NowPlayingArtworkPager.kt
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Hey @sungoldsv thanks for the fix! When I was working on Cover Flow under MVVM (a nightmare) I also had to tweak the scroll behavior for it to snap into the adjacent track and not scroll all the way to the end. My review is only about comments. When the code is clear, the scope is small and the variable names are descriptive we are starting to drop comments to tidy up the code base. |
Animate only adjacent moves; gate first composition on loaded data and ignore empty-browser states instead of coercing to index 0.
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Thanks for confirming, I have removed both comments in the latest push, and noted on the policy. The code does read clean without them :) |
Closes #1196
The coverflow animated through the whole queue on cold start with the player open, instead of starting on the current track.
rememberPagerState(initialPage)runs once, while the queue is still empty, so the pager boots at page 0 andanimateScrollToPagefires when the real index arrives. Same fling happened on any far jump (saved-queue load, distant tap). Returning from Home had a second trigger: the browser reconnects empty and the state updater coerced "no index" into 0.Now the pager waits for loaded data before first composition, only adjacent moves (next/prev, auto-advance) animate while far jumps snap instantly, and empty-browser states are ignored instead of coerced to index 0.
Summary by CodeRabbit