unoplatform/uno 6.5.64

on GitHub

What a release! We are staying on the forefront of AI innovation while strengthening the core cross-platform .NET open-source ecosystem. The February release delivers something for everyone.

Studio users get tighter AI integration and Hot Design UX and workflow enhancements.

All users benefit from long-requested Unicode text support, further WebView2 improvements, drag-and-drop for browser targets, and a plethora of performance and stability fixes.

The numbers speak for themselves: 450+ community and customer issues resolved, delivering a faster, more stable Uno Platform experience end-to-end.

Read more on our blog post!

Here's the full change log:

Features

• Add CLAUDE.md (28ab1a3)
• Add basic regular snap points support for ItemsPresenter (3df6143)
• Add BindableAttribute to Uno.Foundation types for NAOT trimmer (12d31b5)
• Add DragUI support for external drag operations in Win32DragDropExtension (1d79256)
• Add DragUI support for external drag operations in WpfDragDropExtension (7e1dcee)
• Add file icon extraction for non-image files in Win32 drag-and-drop (b6a8df0)
• Add GeneratedCode and EditorBrowsable attributes to GlobalStaticResources class (8c8a73c)
• Add HTML clipboard sample to ClipboardTests (0aa213b)
• Add HTML format support for Clipboard on WebAssembly (2151f2b)
• Add JsonToObject markup extension (400572f)
• Add loopback address support for WASM and desktop platforms (6839b73)
• Add support for DispatchNewWindowRequested Wasm (fdfcf8d)
• Add support for MCP roots (7905b01)
• Add support for NewWindowRequestedCallback on macOS (0a31e77)
• Add support for tools caching (4416c5f)
• Add support for WrapMode in PipsPager (64774da)
• Add table of contents generation to llms files (adeba90)
• Add validation for CornerRadius, GridLength, and numeric types in XAML generator (70e2cef)
• Add WebView2 window close test page with keyboard shortcut functionality (53d8694)
• Adjust for multi-screen support (b46e2e4)
• Adjust runtime tests layout (4a635d4)
• Cache last HTML content on macOS (495c3a6)
• Correctly update drag regions on WindowChrome and layout changes (b568f24)
• Dynamically retrieve generator version from assembly (2b888b7)
• Enable partial code gen with invalid XAML (5d861f9)
• Enhance parser en code gen to pass over invalid syntax in Bindings (e4d7f8e)
• Enter filters including test class name (7f5a8a8)
• GBM + libDRM for linux framebuffer (7ae81c9)
• hr: Add ability to add/edit/delete multiple files at once (9df4175)
• hr: Add support for add cource code through HR (b7b5661)
• hr: Add support for multi TFM project, making support for add availble for mobile targets (fd72c60)
• hr: Make support of HRinfo check more reliable (1279f65)
• hr: Make sure we never init 2 HR workspace (173036f)
• Implement WebView2 NewWindowRequested event for all platforms (c6f6ff8)
• Implement Option 2 - Remove matrix strategy and use inputs.branch with master fallback (c850497)
• Implement Package.Current.Id.Version for Skia and WASM platforms (aa8a7e1)
• Improve code generation erro reporting (32223de)
• Improve runtime tests output (28e09b7)
• Improve XAML gen error handling by continuing if object properties gen fails (d7240fa)
• mcp: Add tools list priming and solution folder (4d34e40)
• Output class/method names to nunit output document (bdbf21a)
• Remove legacy #error in XAML code generation (b502c84), closes #error
• Render file icon from shell information (f812b33)
• Reset AppWindowTitleBar to default (ad521ed)
• Restore static method when hot reload disabled (7fef569)
• Separate Uno-specifics, add missing property notifications (5b4d35b)
• Support predictive back navigation in Android 15+ (8d66386)
• Track Inconclusive runtime tests (bbc6eb3)
• Use assembly version for PackageId.Version (e57af79)
• Use version in GeneratedCode attribute (af89841)
• wasmskia: Drag & drop support (149ab96)
• wasm: software rendering fallback (6e9fbca)
• win32: add support IDataObjectAsyncCapability Drag&Drop operations (43f8530)
• WinUI porting agent (896cee4)
• WinUI StackPanel (06b261d)
• X11: EGL+GLES support (57ff072)

Performance Improvements

• Avoid calculating the matrix multiple times (bd50f00)
• avoid creating unnecessary FrameworkTemplatePool entry (f7538bc)
• Cache logger instance and align exception handling (7012547)
• on macOS and Windows, load CLDR data from a shared icudt.dat instead of dynamically linking the data (82f28cc)
• Optimize loopback address duplicate check with HashSet (df01b05)

Bug Fixes

• AndroidX version overrides (68650c7)
• IMediaPlayerExtension should remain public (478e34e)
• SystemFocusVisual render transform (e0ee4ac)
• Add better error handling for custom markup extensions (edbfdd3)
• Add InitializeWithWindow to MessageDialog samples (2cb10bd)
• Add missing callback (f527697)
• Add missing sass:color import for lighten() function (ea94b68)
• Add null checks for empty version arrays and fix race condition in error handling (bc9bf87)
• Add Thickness validation to generate UXAML0001 for invalid margin values (4c7c4df)
• Address accessibility and scroll handler review comments (f8b9a3f)
• Address code review comments (dd7b60b)
• Address code review feedback - add HTML encoding and truncation (d1085ad)
• Address code review feedback - fix resource leaks, null checks, and improve documentation (14c657d)
• Address markdown linter issues with list formatting (17ccd41)
• Address open review comments - thread safety and clarifications (238bff3)
• Address PR review feedback - semicolon, range operator, and HTML behavior (b600777)
• Address review comments - XSS, memory leak, performance, aria-label (c9dc705)
• Address XSS vulnerability in edit link icon (febaf2f)
• Adjust When_Visibility_Changes to run only for types with a parameterless constructor (180aea1)
• Adjust compat attributes version inclusion (2aaee32)
• Adjust DllImportResolver for net10 compatibility (23021d5)
• Adjust MCP start and testing (0434330)
• Adjust nuget override location (6464f02)
• Adjust WebSocket error logging (258ee99)
• adjusted highlight in box (09f4145)
• Allow extending into titlebar on startup (cf603bf)
• Allow Key property in XAML for KeyboardAccelerator (3ed77c6)
• Allow snap layouts menu on maximize button (9f31bd8)
• Android: application crash when activated from deep link skia (5aca07d)
• Android: deep link for skia when app is running (6fc74d4)
• Apply code review feedback - fix error messages and null handling (2a47a4b)
• Apply extension on show (f9727e6)
• Apply same race condition fix to MSAL and MediaPlayer WASM projects (c6f9ae5)
• Apply suggestion from @Copilot (5420c47)
• Apply suggestion from @Copilot (65c9f42)
• Avoid redundant Extension suffix lookup (43b31ed)
• build (9701fc7)
• CalendarView: header value format when Spanish culture (1470f85)
• calendarview: snapping back mid-scroll (b2b80c0)
• CalendarView: wrong value when Spanish culture (ee9562c)
• Catch WebSocketException to prevent invalid error logs on disconnect (b8c9958)
• change MP volume range to 0.0-1.0 and propagate volume change from libvlc (b7bf7d7)
• Clarify comment about cachedDataDisplayed flag (c20bc08)
• Combine IOException and WebSocketException handlers (d62f302)
• Complete exception handling and optimize MemoryStream allocation (122cc0d)
• ContentPresenter: native element not moving with scrolling (c35f2be)
• Correct comment syntax in PipsPagerPage (309efde)
• Correct conditional check in OnButtonEnabledChanged method (69b656d)
• Correct output file locations to articles/llms folder (8d57c6e)
• Correctly extract display point (8d76310)
• create issue in appropriate repo (ce0023c)
• Define SC_MASK constant and optimize parentHwnd variable reuse (38953ff)
• docs: Fix Markdown validation (f223ca7)
• docs: Remove duplicate uno-check line (e832779)
• docs: use aka link for upgrade guide instead of hardcoded path (e33295a)
• droid: statusbar inset after deeplinking (6ebbb11)
• Enable the back button predictive behavior on Android 16+ (7511454)
• Enable value type support in metadata provider and add runtime tests (9e1b33c)
• Ensure consistent case comparison for loopback address (249d746)
• Ensure finite values in native element measurement for Win32 (2273b29)
• Ensure MessageDialog tests are associated with the correct window (2dfbdc9)
• Ensure top edge resizability (22b2567)
• External image sizing and anchoring (b5e891f)
• first frame white flash (be54758)
• Fix binlogs not generated on demand by HR on unix systems (713127e)
• Fix cannot HR app with proejct depedency with code and rider (dec7461)
• Fix markdown formatting in documentation (33f4ca8)
• Fix missing owner on XAML objects (ea29871)
• Fix possible ENC0004 with HR (86741af)
• Fix possible invalid encoding when HR with VS (e806856)
• Forward Alt+F4 and WM_CLOSE from WebView2 to parent window (bebd503)
• GlobalStaticResources: add an exclude xml doc tag to the generated type definition (05f8d87)
• Handle collection properties in custom markup extensions (683aeac)
• Handle null version values and clarify error handling logic (7b9849a)
• Handle value types (structs) in BindableTypeProviders generator (d085b67)
• hid box when overlaps doc content (6a95b0e)
• hr: Avoid double update when editing multiple files as once (c4f64b7)
• hr: Ensure proper disposale of HR workspaces (4e45203)
• hr: Fix HR compiling all target (69a4083)
• hr: Fix HR messages lost by JsonRPC due to buffer limitations (fcc8f26)
• hr: Fix HR not working on iOS (2c2f201)
• hr: Fix possible concurrency issue in HR driving to miss / fail some updates (47c4039)
• hr: Make sure concurrent HR workspace (multi connection) does not fall in update loop (e096766)
• hr: Make sure to not send HR message to debuuger when not attached! (e67dcb1)
• Improve aria-label and add error handling to scroll handler (8799ba8)
• Improve mouse button state tracking and reset logic on macOS (ca5c9a5)
• Incorrect TabView listview event (7d0fc61)
• Increase WebSocketException log level to Information (a5c7d27)
• inherited dc lifecycle (389abe5)
• Initialize extended titlebar height on startup (f4df70c)
• Layout, naming (e2cdee1)
• link alignments (4cc1c56)
• lottie: use SKCanvasElement's size parameter to determine drawing bounds on Skia (1be6f17)
• macOS: only display windows when Activate is called (abb4c65)
• macos: prevent window contents from being stretched when resizing the window (21309c5)
• Make sure to generate HRInfo only for head project + make sure to detect changes! (5e81e6a)
• Make sure to not show temp files in HRI when doing HR with agent (9af1e17)
• Make sure to not wait response from IDE when no IDEChannel (6e128ce)
• mcp: Adjust for no tools_update notification on claude/codex (6480e23)
• mcp: Adjust roots support for windows paths (716cf4f)
• mcp: Ensure devserver is started on calling uno_app_set_roots (1127fa6)
• mcp: Use solution dir parameter (bda8920)
• Measurement logic for native elements on macOS (6760042)
• mem-leak in FrameworkTemplate (31c8a31)
• moved badge to breadcrumb (9df12f4)
• Order _openPopups with most recently opened popup at head (f73c7e4)
• Override TypeScript outFile to avoid TSC race condition (795d3af)
• Pass location.search to parseQueryString for deep linking tabs (fea065a)
• Potential race conditions (7fbaed7)
• Prevent empty PR creation in docs-updater workflow (42a4e15)
• Prevent NaN widths in TabView during layout timing differences (960c70f)
• Prevent roslyn bug by always generating change content (19951ac)
• Prevent XSS vulnerabilities by using DOM manipulation instead of innerHTML (1266080)
• progressring: ring sizing should respect the ActualSize and Stretch (aa81580)
• Properly parse and render nested items in TOC (2bb5a75)
• Properly set AppWindow sizes on other targets (d504487)
• pt: Fix possible leak on iOS when removing a page from tree while finger down (dac40ce)
• refreshcontainer: resetting content margin (f22cdc2)
• Regenerate test files (30beb3b)
• removed HD folder (cf8db37)
• removed HD folder (298042d)
• rendering: avoid limiting clip bounds to 999999 (7b8dd47)
• Replace closeModal() call with direct remove() to avoid ReferenceError (7660f09)
• Replace GetRelativePath with PowerShell 5.1 compatible implementation (3e9173e)
• Replace magic numbers with named constants for WM_SYSCOMMAND and SC_CLOSE (ccf457b)
• Replace remaining template literals with string concatenation (fc002b8)
• Replace template literal in badge title with string concatenation (1c14033)
• Replace template literals with string concatenation for command strings (789f1c9)
• Replace throw with AddError for invalid values to allow valid C# generation (cdec53b)
• Resolve markdown linting errors in README.md (535a388)
• Resolve race condition in Lottie WASM TypeScript compilation (6f60071)
• Resolve xref UIDs to actual markdown file URLs (d56094c)
• Retrieve drag data directly from IDataObject in Win32 implementation (c4699b5)
• Revert Int32 validation, add validation to SplitAndJoin for Vector2, Vector3, Point, Size, Matrix types (3c8b545)
• Review from copilot (3e9b164)
• Separate Space key handling to keyup to prevent page scrolling (956fed4)
• Simplify sample (023f0f0)
• skia: closed flyout still linger on screen (d5396cc)
• Support custom markup extensions in XamlReader.Load (72910a2)
• Sync backing field (f7d167a)
• textblock: selection should only show when focused (d098f15)
• textbox: prevent keys from dropping when input is too quick (5008219)
• textbox: propagate TextAlignment to TextBlock correctly (752bc7c)
• text: check for empty text in UnicodeText.GetLineAt (3c13220)
• text: erroneous logic when a text run ending in CRLF is moved to the next line due to line wrapping (b675e2f)
• text: fix GroupByInline when tab is at the end of the run (406d8ab)
• text: search for versioned libICU shared libs on Linux instead of only the versionless symlink (efa273e)
• text: selection when the content is a single letter (8edf4d4)
• TimePicker: numbers disappear while fast scrolling (8ad002b)
• TimePicker: showing 0 hours (7e7c8b9)
• TimePicker: value when 12 hours (e7f24e1)
• tooltip: dismiss tooltip when pointer interaction is "done" (c977505)
• Transform TextBox touch-based carets correctly (4e16783)
• trimer: Fix IL2026 JSON warnings in src/Uno.UI (d7c4fa3)
• Update build script to use new parameter names (8c4501a)
• Update comment to reference issue by title instead of placeholder URL (13c5208)
• Update doc/templates/uno/component/affix.js (4971474)
• Update doc/templates/uno/component/affix.js (5c6b41f)
• Update doc/templates/uno/component/affix.js (fc62228)
• Update doc/templates/uno/component/affix.js (a0b56bc)
• Update doc/templates/uno/component/affix.js (aecabc8)
• Update doc/templates/uno/component/affix.js (61c41ac)
• Update doc/templates/uno/component/affix.js (324ac55)
• Update doc/templates/uno/layout/_master.tmpl (dd2aacc)
• Update doc/templates/uno/layout/_master.tmpl (3d2e6f7)
• Update doc/templates/uno/main.js (e77c0c2)
• Update doc/templates/uno/main.js (0c3c718)
• Update doc/templates/uno/main.js (900117c)
• Update doc/templates/uno/main.js (97e892e)
• Update doc/templates/uno/main.js (c4583de)
• Update doc/templates/uno/main.js (269a610)
• Update doc/templates/uno/main.js (104bd4b)
• Update doc/templates/uno/main.js (dff8b8c)
• Update doc/templates/uno/styles/main.js (eb8db7f)
• Update doc/templates/uno/styles/main.js (ba02108)
• Update targetSdkVersion to 36 in native Android manifest for consistency (052f5e3)
• Use bulleted lists in TOC and fix file path URLs (a7ee92a)
• Use DependsOnTargets and _UnoEmbeddedResourcesInjection to ensure TypeScript files exist before embedding (09dddae)
• Use information log level for devserver CLI commands (609669b)
• Use null instead of empty strings for unused parameters (c988cd3)
• Use ParentHwnd property to get parent window handle (96b1363)
• Use the right Arrange/Measure overload for native targets (6369615)
• Use xref anchor links in llms-full.txt TOC instead of raw GitHub URLs (6d3d6f0)
• using standard badge appearance (e0c28ee)
• wasm: Add ControlLeft and ControlRight mappings to BrowserVirtualKeyHelper (f276f86)
• wasm: avoid exception in the first render call (e736efb)
• wasm: avoid ICU-loading crash on NativeAOT (78b503d)
• wasm: fix crashing when loading images (36a7d36)
• wasm: out of memory access when calling ubrk_open (68a7652)
• webview: prevent webview from being reset when detached then reattached (dbeb4c2)
• win32: generate an initial frame with the correct size when starting up as maximized (081be31)
• xamlreader: Accept valid toplevel properties and positional binding parameters (03229ce)

Reverts

• Revert "test: fix japanese CalendarView tests" (b9970c5)
• Revert "chore: render loop adjustments" (2543b03)
• Revert "chore: remove initial InvalidateRender call" (10d6a7a)
• docs: undo PRs #21808 and #21800 (UDEI screenshots + markdown fixes) (a1f877b)