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refactor: extract ChatOverlayLayer — real component decomposition, Commit G
gramps released this
2026-08-31 17:48:10 +00:00 The first true decomposition of the 4105-line god-object, not another partial
shuffle. MainViewModel.Chat.cs 194 -> 44 lines of thin delegation; all chat
behavior now lives in a self-contained Services/ChatOverlayLayer.cs (199):- Owns the message buffer (Messages), ChatBoxRenderer, fade + mock-preview
timers, per-source preview renders, and the live-output RenderFrame path. - The VM keeps only the binding surface: ChatMessages delegates to
_chatLayer.Messages (so XAML ItemsSource + LeftPanel CollectionChanged hold),
CanAddYouTubeChat / ShowChatInactiveMessage stay computed on the VM
(OnPropertyChanged raised from VM setters + XAML-bound), and thin forwards. - Scenes handed in as args (no Func seam), so the layer owns no scene graph.
An AI reading ChatOverlayLayer.cs now sees the entire chat feature in one
self-contained unit. Zero behavior change; build 0 warnings; 246 pass, only the
2 known failures. Docs: ViewModels/index.md tracker updated in same commit.Downloads
- Owns the message buffer (Messages), ChatBoxRenderer, fade + mock-preview