forked from 1b-agent/opencadstudio-upstream
Hakan SevenandClaude Opus 4.8
ba3b3202e8
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>
50 lines
1.7 KiB
Swift
50 lines
1.7 KiB
Swift
// macOS QuickLook thumbnail extension for DWG files.
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//
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// Calls the Rust core (`dwg_thumbnail_png`, linked from libdwg_thumbnailer.a)
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// to extract the embedded preview as PNG, then hands it to QuickLook.
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//
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// Add this file to a "Thumbnail Extension" target, expose the C ABI through a
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// bridging header that #includes `dwg_thumbnailer.h`, and link the static lib
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// (see README). QLSupportedContentTypes must list the DWG UTI (com.autodesk.dwg).
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import QuickLookThumbnailing
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import CoreGraphics
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import ImageIO
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import Foundation
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final class ThumbnailProvider: QLThumbnailProvider {
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override func provideThumbnail(
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for request: QLFileThumbnailRequest,
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_ handler: @escaping (QLThumbnailReply?, Error?) -> Void
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) {
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let maxDim = UInt32(max(request.maximumSize.width, request.maximumSize.height))
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var ptr: UnsafeMutablePointer<UInt8>? = nil
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var len: Int = 0
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let ok = request.fileURL.path.withCString { cpath in
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dwg_thumbnail_png(cpath, maxDim, &ptr, &len)
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}
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guard ok, let p = ptr, len > 0 else {
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handler(nil, nil) // no preview → QuickLook falls back
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return
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}
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let data = Data(bytes: p, count: len)
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dwg_thumbnail_free(p, len)
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guard
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let src = CGImageSourceCreateWithData(data as CFData, nil),
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let cg = CGImageSourceCreateImageAtIndex(src, 0, nil)
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else {
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handler(nil, nil)
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return
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}
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let size = CGSize(width: cg.width, height: cg.height)
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let reply = QLThumbnailReply(contextSize: size) { (ctx: CGContext) -> Bool in
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ctx.draw(cg, in: CGRect(origin: .zero, size: size))
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return true
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}
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handler(reply, nil)
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}
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}
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