G9: map AI5_RulerUnits value 6 to pixels on .ai import

Co-authored-by: Cursor <[email protected]>

crates/eps/src/import/ai/read.rs

@@ -81,7 +81,7 @@ const MAX_HEX: usize = (MAX_PIXELS as usize) * 10;
 /// Largest side of the document and its artboards (points).
 const MAX_SIDE: f64 = 1e6;
 
-/// `%AI5_RulerUnits` → [`Unit`] (Illustrator 7 spec table 3; 4 and 5 are centimeters and pixels in later files).
+/// `%AI5_RulerUnits` → [`Unit`] (Illustrator 7 spec table 3; centimeters is 4; pixels is 6 in later files).
 fn ruler_unit(v: u8) -> Option<Unit> {
     Some(match v {
         0 => Unit::Inches,
@@ -89,7 +89,7 @@ fn ruler_unit(v: u8) -> Option<Unit> {
         2 => Unit::Points,
         3 => Unit::Picas,
         4 => Unit::Centimeters,
-        5 => Unit::Pixels,
+        5 | 6 => Unit::Pixels,
         _ => return None,
     })
 }

crates/eps/src/import/ai/tests.rs

@@ -43,6 +43,8 @@ fn ruler_units_from_the_header_set_the_documents_units() {
     assert_eq!(read_ok(&stream(&body)).doc.units, Unit::Points, "default when the comment is absent");
     let with_in = with_mm.replace("AI5_RulerUnits: 1", "AI5_RulerUnits: 0");
     assert_eq!(read(with_in.as_bytes()).unwrap().doc.units, Unit::Inches);
+    let with_px = with_mm.replace("AI5_RulerUnits: 1", "AI5_RulerUnits: 6");
+    assert_eq!(read(with_px.as_bytes()).unwrap().doc.units, Unit::Pixels);
 }
 
 /// The children of the first layer.