Finder thumbnails and "Open with" registration fail in the field for
three compounding reasons: the app claims com.autodesk.dwg/.dxf but
never declares them (UTImportedTypeDeclarations was missing, so on
systems with no other declarer Launch Services can't bind the
extensions at all); the QuickLook appex only serves com.autodesk.dwg
while machines with AutoCAD installed resolve .dwg to its exported
com.autodesk.autocad.dwg (BricsCAD etc. likewise win with their own
UTIs); and the ad-hoc --deep signature carries no entitlements, but a
QuickLook thumbnail extension must be sandboxed
(com.apple.security.app-sandbox) before macOS will run it.
Import-declare both UTIs, claim and serve the AutoCAD variants too,
add the appex sandbox entitlements, and add
packaging/build_macos_signed.sh — a local mirror of the CI build-macos
job that signs with a Developer ID (hardened runtime, per-component
entitlements), notarizes and staples. DEVELOPER_ID=- reproduces the
CI ad-hoc build.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Round-trip a raster preview through the DWG's embedded preview slot and
surface it to the OS file managers, so drawings show their contents in
Explorer / Finder / Nautilus instead of a generic document icon.
OCS:
* io::thumbnail — rasterize the scene to a BMP DIB on save (embedded via
acadrust's new Preview type) and read it back on open for the Start
page recent list; `--dwg-thumbnail IN OUT SIZE` CLI extracts a badged
PNG for external thumbnailers.
* io::file_association::install_thumbnailer — self-install the OS
integration on startup: Linux writes a .thumbnailer + hicolor mimetype
icons; Windows registers the IThumbnailProvider DLL under HKCU.
Shared core:
* crates/dwg-thumbnailer — lean (image-only) preview extractor + the
`badge_dwg` full-width "DWG" band, used by every platform so the
ribbon is single-sourced. Ships an rlib+staticlib.
* crates/dwg-thumbnailer-win — IThumbnailProvider COM in-proc server
(cfg(windows), CI-built as a workspace member).
* macos/ — QuickLook thumbnail extension (Swift + C-ABI bridge to the
core staticlib), assembled into a .appex.
Icons & packaging (single SVG source -> per-platform assets in CI):
* assets/mimetypes/image-vnd.{dwg,dxf}.svg — themed file icons.
* packaging: WiX ships dwg/dxf.ico + the thumbnail DLL and points the
ProgIds at them; Info.plist gets CFBundleTypeIconFile + the QuickLook
extension in Contents/PlugIns.
* release.yml — generate .ico (Windows) and .icns (macOS) from the SVGs,
build the QuickLook .appex, and bundle everything.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
