.ai save: the no-PDF-content warning names the editing data

A .ai saved with pdfCompatible false warned that other apps show empty
pages, also when the file carries the editing copy of its art. With the
editing copy the warning now says that apps that read its editing data
open it; with editingData false it is unchanged.

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

@@ -574,6 +574,9 @@ fn blank_pages(doc: &Document) -> Document {
 
 /// Why a `.ai` file saved without PDF content looks empty elsewhere.
 const NOT_PDF_COMPATIBLE: &str = "saved without PDF content: VectorCraft opens it as before, other apps show empty pages";
+/// The same, for a file that carries the editing copy of its art.
+const NOT_PDF_COMPATIBLE_EDITING: &str =
+    "saved without PDF content: VectorCraft and apps that read its editing data open it, other apps show empty pages";
 
 /// `e`, an error of the export encoders, under the save command `cmd` instead of
 /// `document.export`.
@@ -631,6 +634,7 @@ pub(super) fn encode_ai(cmd: &str, f: &Format, doc: &Document, p: &Value) -> Res
     };
     let native = || super::native::ai_native(cmd, doc, &native_options);
     let other_apps: AiEditingData = super::encode::options(f, &params)?;
+    let carries_editing = std::cell::Cell::new(false);
     let private = || {
         if !other_apps.editing_data.unwrap_or(true) {
             return Ok(None);
@@ -651,12 +655,13 @@ pub(super) fn encode_ai(cmd: &str, f: &Format, doc: &Document, p: &Value) -> Res
         let (data, lost) = vectorcraft_eps::ai_private_data(art, &o).map_err(|e| bad(cmd, e))?;
         // Placed files that weren't found are written as their previews here too.
         resolved_warnings.extend(lost);
+        carries_editing.set(true);
         Ok(Some((data, resolved_warnings)))
     };
     let (bytes, mut warnings) = super::pdf::encode_carrying(cmd, &pages, &params, native, private)?;
     warnings.extend(placed_warnings);
     if !pdf_compatible {
-        warnings.push(NOT_PDF_COMPATIBLE.to_string());
+        warnings.push(if carries_editing.get() { NOT_PDF_COMPATIBLE_EDITING } else { NOT_PDF_COMPATIBLE }.to_string());
     }
     Ok(Encoded { warnings, ..Encoded::one(bytes) })
 }

crates/engine/src/tests/saveoptions.rs

@@ -196,7 +196,11 @@ fn ai_without_pdf_content_and_compression() {
     };
     let (full, _) = ai(&mut s, json!({}));
     let (blank, warnings) = ai(&mut s, json!({"pdfCompatible": false}));
-    assert!(warnings.as_array().unwrap().iter().any(|w| w.as_str().unwrap().contains("without PDF content")), "{warnings}");
+    let says = |w: &Value, text: &str| w.as_array().unwrap().iter().any(|w| w.as_str().unwrap().contains(text));
+    assert!(says(&warnings, "without PDF content") && says(&warnings, "apps that read its editing data open it"), "{warnings}");
+    // Without the editing copy, other apps show empty pages.
+    let (_, plain) = ai(&mut s, json!({"pdfCompatible": false, "editingData": false}));
+    assert!(says(&plain, "VectorCraft opens it as before") && !says(&plain, "editing data"), "{plain}");
     // The pages are empty (an import of a page finds no art), the document comes back whole.
     let page = |s: &mut Session, b: &[u8]| {
         s.execute("document.open", &json!({"name": "x.ai", "dataBase64": vectorcraft_format::base64_encode(b), "pages": "1"})).unwrap();