Check current DPI awareness before calling SetProcessDpiAwarenessContext.
Windows only allows setting DPI awareness once per process - either via
manifest or API, not both. If already set (e.g., via application manifest
in built binaries), skip the API call to avoid "Access is denied" errors.
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* perf(v3): optimize JSON processing and reduce allocations in hot paths
- Switch to goccy/go-json for method binding, events, and HTTP transport
(21-63% faster, 40-60% less memory for method calls)
- Optimize BoundMethod struct layout to reduce padding (144 -> 136 bytes)
- Cache isVariadic flag at registration to avoid reflect call per invocation
- Use stack-allocated buffer for method arguments (<=8 args)
- Optimize result collection to avoid slice allocation for single return values
- Use sync.Map for MIME cache to improve concurrent read performance
- Use buffer pool for HTTP transport request body reading
- Lazily allocate CloseNotify channel in content type sniffer
- Remove debug CSS logging from asset server
- Add comprehensive benchmark tests (build tag: bench)
Performance improvements for BoundMethod.Call:
- SimpleCall: 1290ns -> 930ns (28% faster), 240B -> 80B (67% less memory)
- ComplexCall: 10500ns -> 3900ns (63% faster), 1192B -> 1020B (14% less)
- VariadicCall: 3460ns -> 1600ns (54% faster), 512B -> 289B (44% less)
* perf(v3): add max size limit to buffer pool to prevent memory bloat
Buffers larger than 512KB are not returned to the pool, allowing GC
to reclaim memory after large requests (e.g., base64 encoded images).
* perf(v3): remove mimetype library dependency, saving ~208KB binary size
- Replace github.com/wailsapp/mimetype with expanded extension map + stdlib
- Expand MIME type map from 16 to 50+ common web formats (fonts, audio, video, etc.)
- Add comprehensive test suite validating MIME detection for all web formats
- Use http.DetectContentType as fallback for unknown extensions
- Actual binary size reduction: 1.2MB (11MB -> 9.8MB in test app)
* perf(v3): migrate all runtime code to goccy/go-json
Migrate remaining encoding/json usages to goccy/go-json in:
- pkg/application (android, darwin, ios, single_instance, webview_window)
- pkg/services (kvstore, notifications on all platforms)
- internal/assetserver/webview (request/response handling)
- internal/runtime and internal/capabilities
Note: encoding/json (110KB) remains in binary because:
1. goccy/go-json imports it for interface compatibility (json.Marshaler, etc.)
2. log/slog (stdlib) uses it for JSON output
The performance benefit is in the hot paths which now use the faster library.
* perf(v3): replace gopkg.in/ini.v1 with minimal .desktop file parser
Replace the gopkg.in/ini.v1 dependency with a purpose-built minimal parser
for Linux .desktop files.
The new parser:
- Only extracts the Exec key from [Desktop Entry] section (all we need)
- Follows the Desktop Entry Specification
- Has comprehensive test coverage (40 tests) including:
- All major file managers (Nautilus, Dolphin, Thunar, PCManFM, Caja, Nemo)
- Edge cases (UTF-8, special chars, comments, empty files, etc.)
- Buffer limit handling
Binary size reduction: 45KB (10.22MB -> 10.18MB)
* perf(v3): remove samber/lo from runtime code, saving ~310KB binary size
Replace samber/lo with Go 1.21+ stdlib slices package and minimal internal
helpers in all runtime code paths. This removes 80 transitive dependencies
from the production binary.
Changes:
- Create internal/sliceutil package with Unique and FindMapKey helpers
- Replace lo.Without with slices.DeleteFunc in event handling
- Replace lo.Ternary with inline if/else in Windows code
- Replace lo.Uniq with sliceutil.Unique for feature flags
- Replace lo.FindKey with sliceutil.FindMapKey for method aliases
- Replace lo.Filter with slices.DeleteFunc in event listeners
- Replace lo.Must with inline panic in w32 package
Binary size: 10.18MB -> 9.87MB (~310KB / 3% reduction)
Note: CLI tools still use samber/lo since they don't affect
production binary size. The application_debug.go file also
retains lo usage as it has //go:build !production tag.
* fix: address CodeRabbit review comments
- Use application/x-typescript MIME type (not IANA-registered text/typescript)
- Fix potential panic in mimetype_stdlib_test.go for short MIME strings
- Use cached isVariadic flag in bindings_optimized_bench_test.go
* fix: initialize goccy/go-json decoder early to fix Windows test failure
On Windows, goccy/go-json's type address calculation can fail if the
decoder is first invoked during test execution rather than at init time.
Force early initialization by unmarshaling a []int during package init.
See: https://github.com/goccy/go-json/issues/474
* 📝 Add docstrings to `v3/performance-improvements` (#4844)
* fix: initialize goccy/go-json decoder early to fix Windows test failure
On Windows, goccy/go-json's type address calculation can fail if the
decoder is first invoked during test execution rather than at init time.
Force early initialization by unmarshaling a []int during package init.
See: https://github.com/goccy/go-json/issues/474
* 📝 Add docstrings to `v3/performance-improvements`
Docstrings generation was requested by @leaanthony.
* https://github.com/wailsapp/wails/pull/4843#issuecomment-3703472562
The following files were modified:
* `v3/internal/assetserver/common.go`
* `v3/internal/assetserver/content_type_sniffer.go`
* `v3/internal/assetserver/mimecache.go`
* `v3/internal/fileexplorer/desktopfile.go`
* `v3/internal/fileexplorer/fileexplorer_linux.go`
* `v3/internal/sliceutil/sliceutil.go`
* `v3/pkg/application/application_ios.go`
* `v3/pkg/application/bindings.go`
* `v3/pkg/application/ios_runtime_ios.go`
* `v3/pkg/w32/window.go`
---------
Co-authored-by: Lea Anthony <lea.anthony@gmail.com>
Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
---------
Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
* feat: Add Content Protection for Windows and macOS
- Prevents window contents from being captured by screen recording/sharing software
- Windows: Uses WDA_EXCLUDEFROMCAPTURE on Windows 10 2004+, falls back to WDA_MONITOR
- macOS: Uses NSWindowSharingType to set window as read-only for screen sharing
- Added ContentProtectionEnabled option to WebviewWindowOptions
- Added SetContentProtection() method for runtime control
- Added comprehensive documentation and example usage
* fix changelog.mdx
* Misc fixes
* Misc fixes
* Update v3/pkg/w32/user32.go
Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
* Remove debug line
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* new events
* macOS dnd improvements
* wailsio adds for dropzone
* update example
* sorta working
the top 300px of the window are not dropabble for some reason i suspect it has to do with the drag enter/drag leave xy as the performOperation needed to use the ContentView for appropriate X/Y
* implement attribute detection for data-wails-dropzone
* docs
* pass x/y dnd linux
* cleanup exmample
* changelog
* pass all attributes to golang on dragdrop
* filetree example
* fix dnd build windows
* Fix windows dnd
* update docs
* remove debug log
* appease the security bot
* Fix changelog
* Fix changelog
* Revert "Fix event generation issues."
This reverts commit ae4ed4fe
* Fix events
* Fix merge conflicts. Fix events generation formatting
* Update docs
* Fix duplicate bundledassets import causing build failures
Remove duplicate import of bundledassets package that was causing
compilation errors in PR #4318. The import was declared twice in
the same import block, causing "bundledassets redeclared" errors.
Fixes build issues in GitHub Actions for drag-and-drop zones feature.
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Co-Authored-By: Claude <noreply@anthropic.com>
* Replace fmt.Printf debug statements with globalApplication.debug
Replace all fmt.Printf debug logging statements in drag-and-drop
functionality with proper globalApplication.debug calls. This provides:
- Consistent logging with the rest of the application
- Proper key-value structured logging
- Better integration with the application's logging system
- Cleaner debug output format
Changes:
- application_darwin.go: Replace 2 fmt.Printf calls
- webview_window.go: Replace 6 fmt.Printf calls
- webview_window_windows.go: Replace 13 fmt.Printf calls
- Remove unused fmt import from application_darwin.go
All debug messages maintain the same information but now use
structured logging with key-value pairs instead of printf formatting.
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Co-Authored-By: Claude <noreply@anthropic.com>
* Add nil checks to WindowEventContext methods
Ensure all WindowEventContext methods properly handle nil c.data
by initializing the map when it's nil. This prevents panics when
methods are called on contexts that haven't been properly initialized.
Changes:
- DroppedFiles(): Add nil check and map initialization
- setCoordinates(): Add nil check and map initialization
- setDropZoneDetails(): Add nil check and map initialization
- DropZoneDetails(): Add nil check and map initialization
All methods now follow the same pattern as setDroppedFiles()
where a nil data map is automatically initialized to prevent
runtime panics during drag-and-drop operations.
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Co-Authored-By: Claude <noreply@anthropic.com>
* Update v3/pkg/application/webview_window_darwin.m
Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
* reinstate events docs.
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Co-authored-by: Lea Anthony <lea.anthony@gmail.com>
Co-authored-by: Claude <noreply@anthropic.com>
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* Add proposal.
Reference Mac implementation
* Add windows support. Update proposal.
* Update example
* Rename Active->Enable,Inactive->Disabled. Ensure window can get controls back after hiding close on windows. Added guide. Updated example.
* Add ExStyle option for setting titlebar style.
* Fix linux builds
* Tidy up
