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refactor!: Drop Skia from the host assemblies, namespaces and types - #24804
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Claude finished @MartinZikmund's task in 3m 18s —— View job Review complete
Verdict: ship 👍No issues found — 0 inline comments posted. What I checkedThis is a 625-file mechanical rename (
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Copilot review overview
🟡 Changes recommended
Two logging examples unintentionally enable unrelated runtime-test categories and should use the scoped prefix.
Review effort: Balanced
Findings: 2
Open (2)
What changed in this PR
Removes obsolete “Skia” naming from runtime-host assemblies, namespaces, APIs, interop paths, and build infrastructure.
Changes:
- Renames shared and platform runtime hosts and public host APIs.
- Updates WASM interop, package/build plumbing, tests, samples, and add-ins.
- Documents the Uno 7 migration.
Findings: 2 documentation issues and 1 spelling issue.
| File(s) | Description |
|---|---|
src/Uno.UI.Runtime/** |
Renames shared runtime and Vulkan namespaces. |
src/Uno.UI.Runtime.{Win32,X11,MacOS,Linux.FrameBuffer,Headless}/** |
Renames desktop host assemblies, namespaces, and build assets. |
src/Uno.UI.Runtime.{Android,AppleUIKit}/** |
Renames mobile hosts and builder APIs. |
src/Uno.UI.Runtime.BrowserWasm/** |
Renames WASM assembly, interop paths, and TypeScript globals. |
src/Uno.UI/** |
Updates host contracts, accessibility APIs, and WASM imports. |
src/Uno.WinRT/** |
Updates launcher namespaces and host visibility. |
src/Uno.UI.RuntimeTests/** |
Updates runtime type and namespace lookups. |
src/AddIns/** |
Renames MediaPlayer and WebView host add-ins. |
src/SamplesApp/**, src/SolutionTemplate/** |
Updates platform-host consumers. |
build/**, src/*.sln*, .github/** |
Updates packaging, solutions, CI, and repository plumbing. |
doc/articles/** |
Documents renamed APIs and logging configuration. |
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Claude finished @MartinZikmund's task in 2m 41s —— View job Review complete
Verdict: fix-first 🟡HEAD is unchanged since the prior review round ( Findings (1 inline comment posted)
Outstanding finding (not inline-commentable — file isn't touched by this PR's diff)
What else was re-checked (no issues)
Cross-cutting notesCould not execute a build or the runtime-test suite in this sandbox. Both findings above are static/code-review assessments, not runtime-validated here; the PackageDiff one would surface in the PackageDiff CI leg, the |
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🤖 Your WebAssembly Skia Sample App stage site is ready! Visit it here: https://unowasmprstaging.z20.web.core.windows.net/pr-24804/wasm-skia-net9/index.html |
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🤖 Your Docs stage site is ready! Visit it here: https://unodocsprstaging.z13.web.core.windows.net/pr-24804/docs/index.html |
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The build 237495 found UI Test snapshots differences: Details
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The runtime hosts no longer depend on SkiaSharp, so `Uno.UI.Runtime.Skia.*` named a backend they do not select. Rename the host and host add-in projects, folders, assemblies and namespaces to `Uno.UI.Runtime.*`, `Uno.UI.MediaPlayer.*` and `Uno.UI.WebView.*`, folding the stray `Uno.WinUI.Runtime.Skia.*` namespaces into the same names. The WASM JS interop namespace moves in lockstep with the managed names. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01CrFdqbK73JzHpqJ8AGQTSv
Remove the empty `SkiaHost` layer so the hosts derive from `UnoPlatformHost` directly, and rename `MacSkiaHost` to `MacOSHost`, `IAndroidSkiaHostBuilder` to `IAndroidHostBuilder`, `IAppleUIKitSkiaHostBuilder` to `IAppleUIKitHostBuilder` and the internal `ISkiaApplicationHost` to `IApplicationHost`. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01CrFdqbK73JzHpqJ8AGQTSv
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01CrFdqbK73JzHpqJ8AGQTSv
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01CrFdqbK73JzHpqJ8AGQTSv
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01G7PsEU6gSpLZXrYuK8WWpt
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01DS3vx6w19rXvxYD4Q3qTCU
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01DS3vx6w19rXvxYD4Q3qTCU
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01DS3vx6w19rXvxYD4Q3qTCU
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Claude finished @MartinZikmund's task in 21s —— View job Status check: both open review findings are already fixed at HEADYou gave no specific request, so I checked the two findings still open from the last review rounds against the current branch (
The "fix-first" verdict from 2026-10-05 16:56Z was based on the earlier HEAD ( I did not build or run anything, so this is a code-review check only. Still open:
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🤖 Your Docs stage site is ready! Visit it here: https://unodocsprstaging.z13.web.core.windows.net/pr-24804/docs/index.html |
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🤖 Your WebAssembly Skia Sample App stage site is ready! Visit it here: https://unowasmprstaging.z20.web.core.windows.net/pr-24804/wasm-skia-net9/index.html |
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The build 237592 found UI Test snapshots differences: Details
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This pull request does not currently match the merge queue conditions, so it cannot be queued from here. The box comes back if it matches again. |
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GitHub Issue: closes unoplatform/uno-private#2395
PR Type:
🔄 Refactoring
What changed? 🚀
Finishes removing "Skia" from the runtime hosts. #24803 renamed the packages; this PR renames the projects, folders, assemblies, namespaces, JS interop names and public types. After it, every remaining "Skia" name refers to the SkiaSharp drawing backend (
Uno.UI.Composition.Skia,SKCanvasElement, theskiafeature, Svg/Lottie), which is accurate.src/Uno.UI.Runtime.Skia[.<Platform>]projects, assemblies, namespacessrc/Uno.UI.Runtime[.<Platform>]Uno.UI.Runtime.Skia.WebAssembly.BrowserUno.UI.Runtime.WebAssembly.Browser, matching theUno.WinUI.Runtime.WebAssembly.Browserpackage idUno.WinUI.Runtime.Skia.*namespaces (X11, framebuffer, Android, AppleUIKit, Headless stragglers)Uno.UI.Runtime.*Uno.UI.MediaPlayer.Skia.{Win32,X11},Uno.UI.WebView.Skia.X11Uno.UI.MediaPlayer.{Win32,X11},Uno.UI.WebView.X11SkiaHost(an empty subclass ofUnoPlatformHost)UnoPlatformHostMacSkiaHostMacOSHost, matchingMacOSHostBuilderIAndroidSkiaHostBuilder/IAppleUIKitSkiaHostBuilderIAndroidHostBuilder/IAppleUIKitHostBuilder, in line withWin32HostBuilder/X11HostBuilderISkiaApplicationHostIApplicationHostglobalThis.Uno.UI.Runtime.Skia.*and[JSExport]pathsglobalThis.Uno.UI.Runtime.*, renamed in lockstep in the TypeScript and the[JSImport]/[JSExport]stringsThe
Use<Platform>()entry points already live inUno.UI.Hosting, so a templated app's host-builder chain compiles unchanged. Only code that names a host type, or uses aUseAndroid(b => …)/UseAppleUIKit(b => …)callback, needs ausingor type-name update.Beyond the find-and-replace
Uno.UI.Runtime.Skia.XandUno.WinUI.Runtime.Skia.X(X11 had 49 files in the latter). Both collapse intoUno.UI.Runtime.X. A collision scan over all 907 type declarations found no clashes in compiled code. The only hit issrc/Uno.UI/Runtime/BrowserPointerInputSource.wasm.cs, a stale copy that no project compiles (Uno.UI excludes.wasm.cs, and the WASM host doesn't link it). Merging also produced duplicate and self-namespaceusings in 7 files; those are removed.Type.GetType("…, Uno.UI.MediaPlayer.Skia.X11")in the Win32/X11 hosts, the runtime tests'FindType/IsSkiaHostAssemblylookups,InternalsVisibleToacross Uno.UI, Uno.WinRT, Uno.Foundation, Uno.UI.Dispatching and Composition,DynamicDependencyon Android, and the embeddedWasmScriptsresource names (viaRootNamespace)..tsfiles declare theUno.UI.Runtime.Skianamespace, andUno.UI.Composition.WebGpu'sWebGpuInit.tsjoins it. TheglobalThis.…strings in[JSImport], and theassemblyExports.Uno.UI.Runtime.Skia.*paths into[JSExport]types, move with them. These fail only at run time if missed, so each was renamed with a rule that also matches a preceding.."Uno.UI.Runtime."with a trailing dot. Logging filters match by prefix, and"Uno.UI.Runtime"would also enable Debug for everyUno.UI.RuntimeTests.*category._AdjustedOutputProjects, solution filters and.slnx,.github/labeler.yml, the macOS native build paths in CI,src/.gitignore, the macOS helper.sln, the MediaPlayer override targets, and theCommonOverridePackageIdpins feat(build)!: Drop the Skia segment from the host package ids #24803 added (the assembly names derive the right package folder again).Uno.UItypes that carried the host namespace (AriaMapper,AriaAttributes,PatternCapabilities,SemanticElementType,WebAssemblyAccessibility, all in the 6.7 baseline). Historical sets are untouched.Not changed
.skia.cs,__SKIA__,__UNO_SKIA__,HAS_UNO_SKIA: out of scope per the issue (dead-#ifcleanup, and a separate issue for the consumer symbol).UnoIsSkiaHeadlessHead/UnoIsSkiaLinuxFramebufferHead, and internal types likeAndroidSkiaXamlRootHost: no consumer-facing effect.UnoMissingAssemblyAnalyzer, the historical migration guides, and the frozen PackageDiff sets: they record what shipped under those names.[Obsolete]aliases: 7.0 is a clean break, like theUno.UI.Toolkit→Uno.UI.Extrasrename.Downstream
A metadata scan of the first-party binaries in the NuGet cache found no references to the host assemblies from
Uno.Toolkit.WinUI,Uno.Toolkit.Skia.WinUI,Uno.Extensions.Hosting.WinUIor the in-appUno.UI.HotDesignlibraries. HotDesign's hits are all inside its self-containedtools/copy of Uno. So, unlike theUno→Uno.WinRTassembly rename, this one shouldn't break those binaries.Uno.Extensions.Maui.WinUI.Runtime.Skia(Maui embedding) wasn't in the cache and should be checked. uno.templates, uno.check and the external docs are tracked in unoplatform/uno-private#2148.PR Checklist ✅
Given_Win32UiaBridge,Given_Win32Accessibility,RuntimeTestsPlatformHelper) cover the string lookups; see Validation.migrating-to-uno-7.md; feature and contributor docs point at the new names.Screenshots Compare Test Runresults.Breaking change (7.0): host assembly, namespace and public type names change as tabulated above; see Runtime host renames in the migration guide.
Validation
Uno.UI.Runtime.Android(net10.0-android)Uno.UI.Runtime.AppleUIKit(net10.0-ios)Uno.UI.Runtime.WebAssembly.Browser(net10.0, incl. TypeScript)Uno.Runtime.Wasm.jsdeclaresUI.Runtimeand its only remaining "Skia" mentions are comments about the Skia backendUno.UI.Runtime.Headless(net10.0)SamplesAppdesktop head (net10.0-desktop): Uno.UI, WinRT,Uno.UI.Runtime{,.Win32,.Win32.Support,.X11,.MacOS,.Linux.FrameBuffer},Uno.UI.MediaPlayer.{Win32,X11},Uno.UI.WebView.X11, runtime testsUno.UI.Runtime.MacOS,Uno.UI.Runtime.Win32)Given_Win32UiaBridge,Given_Win32Accessibility,Given_MediaPlayerElementFindType("Uno.UI.Runtime.Win32.…")lookups and the Win32 host loadingUno.UI.MediaPlayer.Win32through its renamedType.GetTypestringnet10.0-browserwasm, Release publish, Playwright/Chromium),Given_BrowserPointerInputSource,Given_BrowserKeyboardInputSource,Given_AriaMapper,Given_AccessibleButton,Given_AccessibleCheckBoxglobalThis.Uno.UI.Runtime.*[JSImport]s, thegetAssemblyExports("Uno.UI.Runtime.WebAssembly.Browser").Uno.UI.Runtime.*[JSExport]paths and theType.GetType(…, Uno.UI.Runtime.WebAssembly.Browser)lookups. Console has no interop errors from the hosts; the one error (globalThis.SampleRunner.init) is the pre-existing native-WASM-era UI-test bridge and is unrelatedRuntime.Skia/MediaPlayer.Skia/WebView.SkiareferencesUno.Extensions.Maui.WinUI.Runtime.SkiaLocal builds use
-p:UnoTargetFrameworkOverride=net10.0*: master targets .NET 11 and no .NET 11 SDK is installed here. Left to CI: the net11 build, the Android/iOS runtime-test legs, the full WASM leg, PackageDiff, and template tests.🤖 Generated with Claude Code
https://claude.ai/code/session_01CrFdqbK73JzHpqJ8AGQTSv