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Native drop - #23470
Native drop#23470
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Drop the native (Android/iOS-UIKit/WASM-DOM) Composition.Visual backing that bridged the Skia compositor to native view trees, leaving the Skia scene graph as the only backing: - Delete Visual/VisualCollection .Android/.UIKit/.wasm.cs, ContainerVisual/ SpriteVisual .UIKit.cs, ScalarKeyFrameAnimation.UIKit.cs, CoreAnimation.Apple.cs, CompositorThread.Android.cs, ICompositionRoot.Android.cs. - Remove the CompositionConfiguration.Options.UseCompositorThread flag and getter (Android RenderNode compositor thread). Part of spec 043 (drop native rendering, Uno 7.0). Validated: Skia + Reference + Tests compile clean. ApplicationActivity.Android.cs still references the removed types; untangled in W2 (unmaintained netcoremobile). BREAKING CHANGE: Uno.CompositionConfiguration.Options.UseCompositorThread is removed; native composition backing types are removed. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Delete the native Apple (iOS/tvOS/macCatalyst, UIKit) UI-rendering backend from Uno.UI: BindableUIView, UIElement/.FrameworkElement.UIKit/.Apple, the native ListViewBase/UICollectionView set, native Picker/DatePicker/TimePicker, CoreAnimation animators, native window/host/frame, CoreGraphics/UIKit helper extensions, and the native MediaPlayerPresenter.Apple. 210 files. Kept (host-linked platform services consumed by Uno.UI.Runtime.Skia.AppleUIKit): native WebView (WKWebView) bridge, TextBox IME input helpers, NativeWindowHelpers. Part of spec 043 (drop native rendering, Uno 7.0). Validated: Skia + Reference + Tests + Skia.AppleUIKit/Android hosts compile clean. BREAKING CHANGE: native Apple UIView-per-element rendering, native Apple control wrappers, and native Apple base classes are removed; Apple targets render via Skia only. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Delete the native Android (Android.Views.View-based) UI-rendering backend from Uno.UI: BindableView and the Bindable* widget wrappers, UIElement/ FrameworkElement/Layouter .Android, native pointer/MotionEvent input, native brushes/border/shadow renderers, NativeListViewBase/RecyclerView, native Frame/Popup/CommandBar/Pivot, native TextBlock/TextBox/IME, native focus/ visual-tree/automation, Application/ApplicationActivity.Android, and the CoreGraphics/Android helper extensions. 204 files. Kept (host-linked platform services consumed by Uno.UI.Runtime.Skia.Android): Activity/Application lifecycle infra, native WebView, native Date/Time picker flyouts, IME input-type helper, NativeWindowWrapper. Also kept (spec-explicit, shared with Skia-on-Android): ViewHelper.Android.cs, InsetsExtensions.Android.cs. Part of spec 043 (drop native rendering, Uno 7.0). Validated: Skia + Reference + Tests + Skia.Android/AppleUIKit hosts compile clean. The Java/JNI BindingHelper.Android project (17 .java) is removed with the project in W1. BREAKING CHANGE: native Android View-per-element rendering, native Android control wrappers, and native Android base classes (BindableView et al.) are removed; Android targets render via Skia only. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Delete the native WASM DOM UI-rendering backend C# from Uno.UI: per-element DOM control .wasm.cs (Control/Border/Image/TextBlock/TextBox/ScrollViewer/ shapes/brushes/ContentPresenter/...), Application(.Interop).wasm, native DOM input (BrowserPointerInputSource.wasm), NativeRenderTransformAdapter.wasm, BrowserHtmlElement.wasm native element hosting, and the native WASM WebView CoreWebView2/HtmlWebViewElement bridges. 114 files. Kept (host-linked, consumed by Uno.UI.Runtime.Skia.WebAssembly.Browser): NativeWebView(.Interop).wasm (HTML overlay WebView), TextBox IME input helpers. Part of spec 043 (drop native rendering, Uno 7.0). Validated: Skia + Reference + Tests + WebAssembly.Browser host lib compile clean. The TypeScript DOM renderer (WindowManager.ts/WasmCSS) and the Uno.UI.Runtime.WebAssembly package are removed separately (W4-ts / W1). BREAKING CHANGE: native WASM per-element DOM rendering is removed; WASM renders via Skia canvas only. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Delete the source generators that synthesized IFrameworkElement onto native-View-based controls, now unnecessary since controls inherit the managed FrameworkElement: - FrameworkElementAndroidMixinGenerator (~1000 lines) - FrameworkElementUIKitMixinGenerator (~1300 lines) - BaseActivityCallbacksGenerator (~300 lines) - prune their cases from Given_MixinGenerators tests. Their emitted output was always gated to #if UNO_MIXIN_GENERATION && __ANDROID__/__APPLE_UIKIT__, so Skia compilations are unaffected. KEPT (deferred): DependencyPropertyMixinGenerator and MixinGeneration.targets /UNO_MIXIN_GENERATION — they still emit cross-platform DPs consumed by Skia (Control.HorizontalContentAlignment, Popup.IsOpen, ListViewBase.*, ...); migrating those to [GeneratedDependencyProperty] is follow-up work. Part of spec 043 (drop native rendering, Uno 7.0). Validated: SourceGenerators .Internal + .Tests + Uno.UI.Skia compile clean. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
- Add the consumer 7.0 migration guide (Skia-only rendering): packaging, removed public API, removed FeatureConfiguration flags, behavioral changes, templates, and a migration checklist (spec 043 section 8). - Convert the dedicated native-rendering docs to "removed in 7.0" stubs that preserve their uids (uno.features.renderer.native, Uno.Development.NativeViews) so existing xrefs keep resolving, pointing to the migration guide. - Add the migration guide to the TOC. Part of spec 043 (W12). AGENTS.md / .claude/rules and the deeper architecture docs (how-uno-works, performance, xf-migration) are intentionally deferred: they describe the contributor-facing current tree, which is mid-migration (native projects/TFMs and DependencyObject-as-interface still present). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Capture validated milestone (native rendering C# removed across all four backends + native mixin generators, ~533 files) and a precise handoff for the remaining workstreams (W1/W4-ts/W5/W8/W9/W10/W11 + deep docs), including the dependency entanglements found and the validation gaps (browserwasm / on-device runtime) that require a CI/device environment. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
IShadowChildrenProvider/ChildrenShadow existed only to enumerate a native view's children without JNI marshalling (the whole file was #if XAMARIN). With native view trees gone, all children are UIElements enumerated via GetChildren(); remove the interface and its two dead native branches (FrameworkElement.GetFirstChild #elif XAMARIN, VisualTreeHelper.ClearChildren #elif __APPLE_UIKIT__). Part of spec 043 W5 (core shared-abstraction cleanup). Validated: Skia + Reference compile clean. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
The W6 (generator removal) and W5a (IShadowChildrenProvider removal) commits staged only deletions and the progress tracker; the accompanying source edits were left unstaged (the working tree built green, but HEAD did not capture them). This commits them: - Given_MixinGenerators.cs: drop the deleted native mixin generators' test cases. - FrameworkElement.GetFirstChild / VisualTreeHelper.ClearChildren: drop the dead native (#elif XAMARIN / #elif __APPLE_UIKIT__) IShadowChildrenProvider branches. Validated: Skia + Reference compile clean (working-tree state, now committed). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Delete shared files whose entire body was native-only (#if __ANDROID__/ __APPLE_UIKIT__/__IOS__) and which referenced now-deleted native types: native pull-to-refresh (NativeRefreshVisualizer, NativeRefreshInfoProviderAdapter, RefreshContainer.native), NativeFramePresenterUIGestureRecognizerDelegate (its NativeFramePresenter was removed in W3), and the native FlipView/ItemsPresenter partials (ItemsPresenter referenced the removed NativeListViewBase). Part of spec 043 W5. Validated: Uno.UI-Skia-only.slnf (Skia + Reference + Tests + Android/AppleUIKit/WebAssembly.Browser host libs) compiles clean. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Remove now-dead native preprocessor branches (#if __ANDROID__/__APPLE_UIKIT__/ __IOS__/__WASM__/XAMARIN) from 18 shared control files, keeping the Skia/ Reference/Tests branches: AppBar, AutoSuggestBox, Border, BorderLayerState, CalendarView (+items/chrome/panel), Canvas, ComboBox, CommandBar, ContentControl, FauxGradientBorderPresenter. ~373 dead lines removed; mixed conditions simplified (e.g. drop native disjuncts, keep IS_UNIT_TESTS / __NETSTD_REFERENCE__). Part of spec 043 W5 (#if-forest cleanup, contributor simplification #12). Validated: Uno.UI-Skia-only.slnf (Skia + Reference + Tests + Android/AppleUIKit/ WebAssembly.Browser host libs) compiles clean. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
…(W5 batch 2) Remove now-dead native preprocessor branches (#if __ANDROID__/__APPLE_UIKIT__/ __IOS__/__WASM__/XAMARIN) from 43 shared files (DataBinding, Extensions, Media, Automation, Application, Control, ContentControl/Presenter, Flyout, Grid, DatePicker, etc.), keeping the Skia/Reference/Tests branches. Files whose entire body was native-only are deleted (TextBoxBehavior, ButtonTitleBindingAdapter, ListViewHelper, NativeDatePickerFlyoutPresenter, FlyoutPopupPanel.iOSAndroid). Host-linked files (GlobalUsings, native pickers/WebView, NativeApplication) and FeatureConfiguration were intentionally excluded (their native branches are live in Skia host builds / need deliberate W8 handling). Part of spec 043 W5. Validated: direct build of Uno.UI.Skia (full recompile, 0 errors) + Uno.UI.Reference (0 errors). Note: Uno.UI-Skia-only.slnf bails early on the env's missing wasm-tools-net9 workload, so direct project builds are the reliable gate. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
…h 2) These files' entire bodies were native-only (#if XAMARIN/__APPLE_UIKIT__/ __ANDROID__) and became empty after the batch-2 cleanup; remove them. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
The WinAppSDK sync generator emitted #if guards and [NotImplemented] attribute arguments for all platforms (__ANDROID__/__IOS__/__TVOS__/__WASM__/ IS_UNIT_TESTS/__SKIA__/__NETSTD_REFERENCE__) in every Generated/ stub. After 7.0 only Uno.UWP and Uno.Foundation still ship per-platform binaries; Uno.UI, Uno.UI.Composition and Uno.UI.Dispatching render through Skia on every target. Thread an `emitNativeDefines` flag through PlatformSymbols (set from ShouldEmitNativeDefines, which keys off the target Generated path): for non-UWP/Foundation libraries the native defines (__ANDROID__/__IOS__/__TVOS__/ __WASM__) are dropped, leaving only IS_UNIT_TESTS/__SKIA__/__NETSTD_REFERENCE__ in the generated #if guards, [NotImplemented(...)] lists, HasUndefined and the attribute-dedup #if. Uno.UWP/Uno.Foundation output is unchanged (native order preserved). Part of spec 043 (drop native rendering, Uno 7.0). Validated: the generator compiles. NOTE: regenerating the Generated/ folders is deferred — the generator's Build() currently loads the Uno.UI .netcoremobile/.Wasm compilations (broken by the native-file removal) for transitive UWP/Foundation symbols; W1 must rewire Build() to load Uno.UWP/Uno.Foundation native compilations directly before a regeneration can run. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> ^ Conflicts: ^ src/Uno.WinAppSDKSyncGenerator/Generator.cs ^ src/Uno.WinAppSDKSyncGenerator/SyncGenerator.cs
…s (W5 batch 3) Remove now-dead native preprocessor branches (#if __ANDROID__/__APPLE_UIKIT__/ __IOS__/__WASM__, incl. negated/mixed forms) from 45 shared layout & control files: Layouter/VirtualizingPanelLayout/ItemsStackPanel/ItemsWrapGrid/ ManagedVirtualizingPanelLayout, ListViewBase, Panel, Selector/SelectorItem, Image, Popup/PopupPanel, Pivot, MediaPlayerElement/Presenter, NavigationViewItem, Page, ButtonBase, ProgressBar/ProgressRing, etc. Mixed conditions simplified to their Skia/Reference disjuncts; negated-native (#if !__APPLE_UIKIT__) bodies promoted unconditionally; #if !__SKIA__ (Reference) branches preserved. Part of spec 043 W5. Validated: direct build of Uno.UI.Skia + Uno.UI.Reference + Uno.UI.Tests, all 0 errors. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
…atch 4) Remove/simplify now-dead native preprocessor branches across 43 shared files (ScrollContentPresenter/ScrollViewer, PullToRefresh, RelativePanel, Repeater, Slider, SplitView/SplitButton, StackPanel, TabView, TextBlock, TextBox.Uno, TimePicker, ToggleSwitch, ToolTipService, Viewbox, WrapPanel, Binding/ TemplateBinding/DataTemplate, MediaPlayerPresenter.Others, etc.), including negated-native (#if !__ANDROID__ && !__APPLE_UIKIT__ -> drop native conjuncts, keep preserved guards). Files emptied of all content removed (ScrollContentPresenter.Native, NativeTimePickerFlyoutPresenter). Agents left genuinely-ambiguous cases (Control.cs, PivotItem.cs, InputPane.others.cs) untouched — harmless dead blocks. Part of spec 043 W5. Validated: direct build of Uno.UI.Skia + Reference + Tests (0 errors) AND the Skia.Android host (net9.0-android, 0 errors) — the latter also retroactively confirms the W2/W3/W4 native-deletion keep-list and the W5 host-linked exclusions are correct at compile time. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
…batch 5) Remove dead positive native preprocessor branches and unwrap always-true negated-native guards (e.g. #if !__WASM__ with no #else) across core XAML files: DependencyProperty/DependencyPropertyChangedEventArgs/Descriptor, Documents (TextElement/Inline/Run/Span/Hyperlink/InlineCollection/Underline), Framework Template(Pool), ElementCompositionPreview, ContentDialog, Image.Properties, FocusProperties, VisualTree, ContentManager, AcrylicBrush, etc. Genuinely-ambiguous cases left untouched by design: #if !__WASM__ ... #else (WASM-only #else), #if false-nested native, and reference-fallback conjunctions (#if !__ANDROID__ && !__SKIA__ && ...) — these are live/cross-flavor guards, not dead native branches. Part of spec 043 W5. Validated: direct Uno.UI.Skia + Reference + Tests, 0 errors. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
…nt/Media/Shapes/UIElement (W5 batch 6) Remove dead positive native preprocessor branches across 43 core files: FrameworkElement, UIElement.* partials (Layout/Properties/FocusMixins/ Pointers.Managed/debugging), Media (Brush/Geometry/Transform/SolidColorBrush/ ImageBrush/RectangleGeometry/animation), Shapes (Shape/Rectangle/Ellipse/ Polygon/Polyline), VisualTreeHelper, ResourceDictionary, FrameworkTemplate(Pool), ElementCompositionPreview, ImageSourceHelper, etc. Mixed conditions simplified to Skia/Reference disjuncts; native [NotImplemented] attribute guards reduced to IS_UNIT_TESTS/__SKIA__/__NETSTD_REFERENCE__. UIElement.MuxInternal.cs and UIElement.RoutedEvents.cs were reverted: their #if !__CROSSRUNTIME__ blocks are LIVE for the unit-Tests flavor (IS_UNIT_TESTS is not __CROSSRUNTIME__) and must not be removed. The build-gated validation caught this; the workflow rule was corrected to never touch negated (!__CROSSRUNTIME__/!__SKIA__/!__NETSTD_REFERENCE__) conditions. Part of spec 043 W5. Validated: direct Uno.UI.Skia + Reference + Tests, 0 errors. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
… + window (W5 batch 7) Remove dead positive native preprocessor branches across large/core files: NavigationView, ItemsControl, ItemsView, Grid, TextBox, FlipView.managed, VisualStateManager, Window + native window wrappers (INativeWindowWrapper/ NativeWindowWrapperBase/BaseWindowImplementation), TemplateManager. Mixed conditions simplified to their Skia disjunct (e.g. #if __WASM__ || __SKIA__ -> #if __SKIA__); negated/Reference/Tests guards (#if !__SKIA__) preserved. Part of spec 043 W5. Validated: direct Uno.UI.Skia + Reference + Tests, 0 errors. (A concurrent workflow run was partially rate-limited server-side; the 8 remaining large files — ScrollViewer, DatePicker, DependencyObjectStore, XamlObjectBuilder, UIElement(.Pointers), MediaTransportControls, LoopingSelector — were left untouched and are handled next.) Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
… batch 8) Remove dead positive native preprocessor branches from the largest core files: UIElement, UIElement.Pointers, DependencyObjectStore, ScrollViewer, DatePicker, XamlObjectBuilder, MediaTransportControls, LoopingSelector_Partial. Using-alias chains collapsed to the managed (UIElement) alias; mixed #if __WASM__ || __SKIA__ reduced to #if __SKIA__; native [NotImplemented] guards trimmed. Negated forms (#if !__WASM__/!__CROSSRUNTIME__) and derived symbols (SUPPORTS_NATIVE_DATEPICKER) preserved. Completes the W5 positive-native #if-forest cleanup across the compile-validatable Uno.UI surface. Validated: direct Uno.UI.Skia + Reference + Tests, 0 errors. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Claude finished @MartinZikmund's task in 7m 20s —— View job PR Review
Overall VerdictThis is a large, architecturally significant PR that removes the native Android, iOS/UIKit, WASM DOM, and native Composition rendering backends from Uno Platform, making Skia the single universal rendering engine. The scope is impressive: ~79k lines deleted across ~100 files in a single coherent branch, with detailed specs, a migration guide, and a structured workstream approach. The changes that landed are well-reasoned and the progression is sensible. 2 medium findings, 2 low/nit findings, 3 cross-cutting notes. Findings by severityMedium
Low / Nit
Cross-cutting notes
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WinAppSDK sync generator drift detected on
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…M runtime dir The Skia browser runtime linked 5 platform-API files (Storage/Pickers/ FileSystemAccessApiInformation, Web/Http/Cookie*) from the now-removed Uno.UI.Runtime.WebAssembly DOM project. Relocate them into Uno.UI.Runtime.Skia.WebAssembly.Browser (picked up by the default compile glob), drop the cross-project <Compile Include> links, and delete the dead Uno.UI.Runtime.WebAssembly directory entirely. Validated: Uno.UI.Runtime.Skia.WebAssembly.Browser builds clean (net9.0 + net10.0, 0 errors). The UNOB0017 "no DOM-runtime dependency" guard is retained. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01QgAgDgH9aucWKC3ewivX1X
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Claude finished @MartinZikmund's task in 4m 12s —— View job PR Review
Overall VerdictFour new commits since the June 22 review:
All four new commits are mechanically sound. The W4-ts source separation workstream item (previously flagged as "follow-up") is now complete — 4 prior findings remain open (3 medium, 1 low). No new code issues introduced. Still-Open FindingsMedium — 4th+ pass open
Low — still open
Resolved Since Last Pass
Cross-cutting Notes
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🤖 Your WebAssembly Skia Sample App stage site is ready! Visit it here: https://unowasmprstaging.z20.web.core.windows.net/pr-23470/wasm-skia-net9/index.html |
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The build 219250 did not find any UI Test snapshots differences. |
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Two W5 #if-cleanup leftovers that UnoFastDevBuild skipped locally but CI's EnforceCodeStyleInBuild flags: - Application.cs: re-indent Package.SetEntryAssembly inside #if __SKIA__ to match the enclosing 4-tab block. - ManagedWeakReference.cs: drop trailing whitespace on a blank line. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01QgAgDgH9aucWKC3ewivX1X
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Claude finished @MartinZikmund's task in 2m 3s —— View job PR Review
Overall VerdictOne new commit since the June 22 09:33 review: 4 prior findings remain open (2 medium, 1 expanded medium, 1 low). No new code issues introduced by this commit. Still-Open FindingsMedium — 5th+ pass open
Low — still open
Resolved Since Last Pass
Cross-cutting Notes
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🤖 Your WebAssembly Skia Sample App stage site is ready! Visit it here: https://unowasmprstaging.z20.web.core.windows.net/pr-23470/wasm-skia-net9/index.html |
…ds (#2104) build/filters/Uno.UI-top-projects-for-sync-gen.slnf still listed the deleted Uno.UI.netcoremobile / Uno.UI.Wasm heads, breaking the sync-gen CI restore with MSB4025 (projects absent from Uno.UI.slnx). Point it at the heads the generator now loads: Uno.UI.Skia/Reference plus the kept Uno.UWP and Uno.UI.Dispatching native + wasm heads (which carry the per-platform UWP/Foundation/Dispatching symbols the generator needs). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01QgAgDgH9aucWKC3ewivX1X
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Claude finished @MartinZikmund's task in 7m 41s —— View job PR Review
Overall VerdictOne new commit since the June 22 11:31 review: 1 partially-resolved High (now Medium) finding. 3 prior Medium/Low findings still open. FindingsMedium — new inline comment posted (6th pass)
The
The slnf fix ( Medium — still open (6th pass)
Low — still open
Resolved Since Last Pass
Cross-cutting Notes
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Generator.Build() loaded the now-deleted Uno.UI native/WASM heads. After repointing to the kept platform heads, two runtime crashes surfaced (only caught at run time, not compile time): - LoadProject's expectedRefs assertion required every loaded project to reference Foundation/Uno/Composition/Dispatching. That holds for the Uno.UI heads but not for the Uno.UWP head now used for native symbols, so base.Build() threw on first load (rethrown by DocGenerator in Release -> 0xE0434352). Make the assertion conditional: full graph for the Uno.UI heads, just Uno.Foundation for the platform head. - DocGenerator dereferenced view.AndroidSymbol, which is null for view types after the drop (Uno.UWP has no view types). Source the cross-platform [Obsolete] marking from the Skia/Reference symbol instead. Simplify the loading: Uno.UWP references Uno.UI.Dispatching and Uno.Foundation, so a single Uno.UWP head transitively resolves all native/WASM symbols. Drop the redundant Dispatching load and the multi-compilation helper (also halves the heavy project loads). Validated: Uno.WinAppSDKSyncGenerator.exe doc runs to completion (exit 0), loading Uno.UWP for the native TFMs, with no expectedRefs failure and no NRE. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01QgAgDgH9aucWKC3ewivX1X
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Claude finished @MartinZikmund's task in 2m 51s —— View job PR Review
Overall VerdictOne new commit since the June 22 12:22 review: Resolved This Pass
Still-Open Findings (7th pass)Medium
Low
Cross-cutting Notes
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The build 219283 did not find any UI Test snapshots differences. |
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5 participants
GitHub Issue: Part of epic unoplatform/uno-private#2049 — 🦋 Drop native targets. Closes sub-issues unoplatform/uno-private#2095, unoplatform/uno-private#2096, unoplatform/uno-private#2097 and unoplatform/uno-private#2104 (full breakdown under Issue coverage).
PR Type:
🔄 Refactoring · 🏗️ Build · 💬 Breaking change (
feat!/refactor!)What changed? 🚀
This PR is the source/project deletion + dead-
#if-cleanup + sync-generator half of the native-targets drop (epic unoplatform/uno-private#2049). With the build/CI/packaging/SDK work already on thefeature/breakingchangesbase (see Already landed in base), this PR physically removes the now-dead native UI code and the orphaned native/DOM project heads so Skia is the only UI renderer inUno.UIand above.Scope:
Uno.UI,Uno.UI.Composition, the mixin source generators, the WinAppSDK sync generator, and the native/DOM project files + solutions. It does not touch the actively-maintained platform APIs inUno.UWP/Uno.Foundation/Uno.UI.Dispatching(still consumed by Skia-on-mobile and Skia-on-browser).Removed 🗑️
Uno.UI/Uno.UI.Composition(208*.Android.cs, 131*.UIKit.cs, 68*.Apple.cs, 17*.iOS.cs, 116*.wasm.cs), native composition backing, native mixin generators, and orphaned fully-native files.*.netcoremobile.csprojheads:Uno.UI,Composition,Toolkit,XamlHost,FluentTheme(.v1/.v2),RemoteControl,RuntimeTests,Lottie,Svg,Maps,Graphics2DSK, plus the nativeSamplesApp.netcoremobile.Uno.UI.Wasm+ theComposition/Toolkit/XamlHost/FluentTheme(.v1/.v2)/RemoteControl.Wasmheads; the DOM add-in headsLottie.Wasm/MSAL.Wasm; the DOM test heads (Uno.UI.Wasm.Tests,RuntimeTests.Wasm); and the DOM samples app (SamplesApp.Wasm).Uno.UI.MediaPlayer.WebAssembly— the old<video>DOM media engine; the browser media player is nowBrowserMediaPlayerExtensioninUno.UI.Runtime.Skia.WebAssembly.Browser.Uno.UI-Wasm-only.slnf,Uno.UI-netcoremobile-only.slnf.Changed ✏️
#ifblocks across ~270 sharedUno.UIfiles in 8 validated batches (Skia-only logic retained;!__SKIA__/Reference/Tests branches preserved).Uno.UWP+Uno.UI.Dispatching, which are siblings onUno.Foundation) instead of the deletedUno.UInative heads, via a multi-compilation lookup.Uno.UI.Dispatchingis correctly treated as a per-platform-shipping library (its generated stubs keep native defines), fixing a regression that had stripped them.Directory.Build.props_AdjustedOutputProjects,Uno.UI.slnx,Uno.UI/Uno.UI.sln,Uno.UI-Skia-only.slnf,Uno.UI-RemoteControl-Only.slnf(also dropped a staleLottie.Tests.csprojref so the Skia solution loads clean).Kept (deliberately) ✅
Uno.UWP,Uno.Foundation,Uno.UI.Dispatching(netcoremobile + Wasm),MSAL,Foldable,GooglePlay,BindingHelper.Android,Foundation.Runtime.WebAssembly, and theSamplesApp.Skia.netcoremobile/SamplesApp.Skia.WebAssembly.Browserheads.Uno.UI.Runtime.WebAssemblyare now relocated into it; the old DOM runtime dir is gone.Added ➕
doc/articles/migrating-to-uno-7.md,native-views.md) and thespecs/043-drop-native-rendering/plan.Issue coverage 🎯
Closed by this PR
.tsDOM removal (W4-ts).#ifblocksDirectory.Build.props,.slnx,.slnand.slnffilters pruned; all solutions load clean.Uno.UI.Runtime.WebAssemblyremoved entirely (5 shared platform-API files relocated into the Skia browser runtime).Uno.UInative/WASM heads; sources native symbols from the keptUno.UWP/Uno.UI.Dispatchingheads; Dispatching native defines restored.Already landed in base (
feature/breakingchanges)Completed by earlier PRs merged into this PR's base (so absent from this diff) — linked for the full epic picture:
Breaking changes ❗
Yes — deliberate for Uno Platform 7.0. Native UI renderers (Android Views, iOS/UIKit, WASM-DOM) are removed; Skia is the only UI renderer. Migration:
doc/articles/migrating-to-uno-7.md.Validation 🧪
#ifremovals: each commit compile-validated onUno.UI.Skia+Reference+Tests+ theSkia.Android/Skia.AppleUIKit/Skia.WebAssembly.Browserhost libs.Uno.WinAppSDKSyncGeneratorbuilds clean (0 errors);Microsoft.UI.Dispatchingstubs retain their native#ifguards.Uno.UI.SkiaandUno.UI.Runtime.Skia.Androidbuild clean (0 errors); no dangling references; every solution project path exists on disk.Uno.UI.Runtime.Skia.WebAssembly.Browserbuilds clean (net9.0 + net10.0, 0 errors), confirming the relocated platform-API source compiles in its new home.wasm-tools-net9isn't available here. These are validated by CI (incl.runtime_tests_skia_browser).Remaining native-drop work (out of scope here)
Tracked in
specs/043-drop-native-rendering/progress.md: WASM.tsDOM removal (W4-ts), media engine relocation (W9), safe-area/keyboard (W10), FeatureConfiguration native flags (W8), and the sync-generator full regeneration once everything lands.PR Checklist ✅
Screenshots Compare Test Runresults.