AF.3: open .afphoto by content without listing it for Finder

The macOS bundle must declare every File › Open extension, and the
packaging of a vector app must not mention raster-editor files. Affinity
Photo documents still open and place: the reader recognizes them by
their content, and a test checks it.

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01GQPh8UDgMyARR5Hat9UchC

Cargo.lock

@@ -4335,7 +4335,7 @@ dependencies = [
 
 [[package]]
 name = "vectorcraft-affinity"
-version = "0.6.0"
+version = "0.7.0"
 dependencies = [
  "crc32fast",
  "flate2",

README.md

@@ -194,7 +194,7 @@ milestones, and honest time-to-parity estimates.
 "a power user can't tell the difference". Everyday vector illustration is close to usable: drawing and path tools,
 Pathfinder and Shape Builder, paint, gradients, appearance and transparency, type with styles, threading and Hebrew/Arabic bidirectional layout, and
 files (SVG, PDF and PDF-compatible `.ai` with PDF/X, EPS, DXF, EMF/WMF, raster formats and PSD, Print, Package).
-Affinity documents (`.af` from Affinity 3, `.afdesign`, `.afphoto` and `.afpub` from Affinity 1 and 2) open
+Affinity documents (`.af` from Affinity 3, `.afdesign`, `.afpub` and, by their content, `.afphoto` from Affinity 1 and 2) open
 and place natively: layers, groups, artboards and pages, curves and shapes, fills, gradients and strokes, clipping
 and masks, text and images, with what didn't come in (effects, adjustments, brushes, master pages…) listed in the
 import warning; a file whose native data can't be read opens as its embedded preview, saying why. VectorCraft

crates/engine/src/cmd/fileio/mod.rs

@@ -556,7 +556,9 @@ pub const FORMATS: &[Format] = &[
     Format { id: "wmf", label: "WMF", extensions: &["wmf"], mime: "image/wmf", read: true, write: true, raster: false, options: metafile::OPTIONS },
     Format { id: "tga", label: "Targa", extensions: &["tga"], mime: "image/x-tga", read: false, write: true, raster: true, options: TGA_OPTIONS },
     Format { id: "psd", label: "PSD", extensions: &["psd"], mime: "image/x-psd", read: false, write: true, raster: true, options: PSD_OPTIONS },
-    reader("affinity", "Affinity", &["af", "afdesign", "afphoto", "afpub"], "application/vnd.affinity", false),
+    // Affinity Photo's `.afphoto` opens by its content but isn't listed: Finder shouldn't offer a
+    // vector app for a raster editor's documents.
+    reader("affinity", "Affinity", &["af", "afdesign", "afpub"], "application/vnd.affinity", false),
 ];
 
 /// Every extension `document.open` reads (the "All readable files" filter of open dialogs).
@@ -583,7 +585,6 @@ pub const OPEN_EXTS: &[&str] = &[
     "eps",
     "af",
     "afdesign",
-    "afphoto",
     "afpub",
 ];
 
@@ -626,7 +627,6 @@ pub const PLACE_EXTS: &[&str] = &[
     "eps",
     "af",
     "afdesign",
-    "afphoto",
     "afpub",
     "txt",
 ];

crates/engine/src/cmd/fileio/tests_affinity.rs

@@ -57,7 +57,7 @@ fn preview_opens_with_a_warning_and_never_saves_to_the_source() {
     }
     let f = format("affinity").unwrap();
     assert!(f.read && !f.write);
-    for ext in ["af", "afdesign", "afphoto", "afpub"] {
+    for ext in ["af", "afdesign", "afpub"] {
         assert!(OPEN_EXTS.contains(&ext) && PLACE_EXTS.contains(&ext), "{ext}");
     }
     assert!(!SAVE_FORMATS.contains(&"affinity"));
@@ -271,6 +271,8 @@ mod native {
             let mut s = Session::new();
             let r = open_bytes(&mut s, "native.af", &document(method), Some("/source/native.af".into())).unwrap();
             assert_eq!(r["format"], "affinity");
+            // Affinity Photo's extension isn't listed, but its documents still open by their content.
+            assert_eq!(open_bytes(&mut Session::new(), "native.afphoto", &document(method), None).unwrap()["format"], "affinity");
             assert!(r["warnings"].as_array().unwrap().iter().all(|w| !w.as_str().unwrap().contains("preview")), "{r}");
             let st = s.doc().unwrap();
             assert!(st.path.is_none(), "Save must not write back over the Affinity file");