Replace onScrollGeometryChange/onScrollPhaseChange with ContentHeightPreferenceKey
approach for improved scroll performance and accurate read progress tracking.
Changes:
- Add ScrollOffsetPreferenceKey and ContentHeightPreferenceKey for scroll tracking
- Track content end position dynamically as WebView loads
- Calculate progress from scroll offset relative to total scrollable content
- Implement 3% threshold for progress updates to reduce API calls
- Add progress locking at 100% to prevent pixel-variation regressions
- Guarantee 100% update when reaching end of content
- Apply to both BookmarkDetailLegacyView and BookmarkDetailView2
Technical approach:
- Place invisible marker at end of content to measure position in scrollView
- Update initialContentEndPosition as content grows during WebView loading
- Progress = (initialPosition - currentPosition) / (initialPosition - containerHeight)
- Lock progress once 100% reached to avoid 100% -> 99% fluctuations
Ilyas Hallak
a5d94d1aee