LRC-LIB-CATALOG-SWITCH: files waiting for a library wait for a running import instead of being dropped (#2779)

crates/ui-egui/locales/cs.json

@@ -2407,6 +2407,7 @@
   "Dropped Files": "Přetažené soubory",
   "Import dropped files without review": "Importovat přetažené soubory bez kontroly",
   "An import is running": "Import už běží",
+  "The photos are imported once it ends": "Fotky se naimportují potom",
   "An import is running. Drop photos when it has finished": "Import už běží. Fotky přetáhněte, až skončí",
   "Finish Lightroom catalog import before adding photos": "Dokončete import katalogu Lightroom, než přidáte fotky"
 }

crates/ui-egui/locales/de.json

@@ -3439,6 +3439,7 @@
   "Dropped Files": "Abgelegte Dateien",
   "Import dropped files without review": "Abgelegte Dateien ohne Prüfung importieren",
   "An import is running": "Ein Import läuft",
+  "The photos are imported once it ends": "Die Fotos werden danach importiert",
   "An import is running. Drop photos when it has finished": "Ein Import läuft. Lege die Fotos ab, wenn er fertig ist",
   "Finish Lightroom catalog import before adding photos": "Schließe den Import des Lightroom-Katalogs ab, bevor du Fotos hinzufügst"
 }

crates/ui-egui/locales/es.json

@@ -2357,6 +2357,7 @@
   "Dropped Files": "Archivos soltados",
   "Import dropped files without review": "Importar los archivos soltados sin revisión",
   "An import is running": "Hay una importación en curso",
+  "The photos are imported once it ends": "Las fotos se importarán después",
   "An import is running. Drop photos when it has finished": "Hay una importación en curso. Suelta las fotos cuando termine",
   "Finish Lightroom catalog import before adding photos": "Termina la importación del catálogo de Lightroom antes de añadir fotos"
 }

crates/ui-egui/locales/fi.json

@@ -2320,6 +2320,7 @@
   "Mask Pins": "Maskin nastat",
   "Photo Counts": "Kuvamäärät",
   "An import is running": "Tuonti on käynnissä",
+  "The photos are imported once it ends": "Kuvat tuodaan sen jälkeen",
   "An import is running. Drop photos when it has finished": "Tuonti on käynnissä. Pudota kuvat, kun se on valmis",
   "Close the open dialog to drop files here": "Sulje avoin valintaikkuna pudottaaksesi tiedostot tähän",
   "Close the open dialog, then drop the files again": "Sulje avoin valintaikkuna ja pudota tiedostot sitten uudelleen",

crates/ui-egui/locales/fr.json

@@ -2353,6 +2353,7 @@
   "Dropped Files": "Fichiers déposés",
   "Import dropped files without review": "Importer les fichiers déposés sans vérification",
   "An import is running": "Une importation est en cours",
+  "The photos are imported once it ends": "Les photos seront importées ensuite",
   "An import is running. Drop photos when it has finished": "Une importation est en cours. Déposez les photos quand elle sera terminée",
   "Finish Lightroom catalog import before adding photos": "Terminez l'importation du catalogue Lightroom avant d'ajouter des photos",
   "The library is empty: the catalog's photos, collections and edits become its first.": "La bibliothèque est vide : les photos, collections et retouches du catalogue seront les premières.",

crates/ui-egui/locales/id.json

@@ -2332,6 +2332,7 @@
   "Mask Pins": "Pin masker",
   "Photo Counts": "Jumlah foto",
   "An import is running": "Impor sedang berjalan",
+  "The photos are imported once it ends": "Foto diimpor setelah selesai",
   "An import is running. Drop photos when it has finished": "Impor sedang berjalan. Jatuhkan foto setelah selesai",
   "Close the open dialog to drop files here": "Tutup dialog yang terbuka untuk menjatuhkan file di sini",
   "Close the open dialog, then drop the files again": "Tutup dialog yang terbuka, lalu jatuhkan file lagi",

crates/ui-egui/locales/it.json

@@ -2360,6 +2360,7 @@
   "Dropped Files": "File rilasciati",
   "Import dropped files without review": "Importa i file rilasciati senza revisione",
   "An import is running": "Un'importazione è in corso",
+  "The photos are imported once it ends": "Le foto verranno importate dopo",
   "An import is running. Drop photos when it has finished": "Un'importazione è in corso. Trascina le foto quando è finita",
   "Finish Lightroom catalog import before adding photos": "Termina l'importazione del catalogo Lightroom prima di aggiungere foto"
 }

crates/ui-egui/locales/ja.json

@@ -2355,6 +2355,7 @@
   "Dropped Files": "ドロップしたファイル",
   "Import dropped files without review": "ドロップしたファイルを確認せずに読み込む",
   "An import is running": "読み込み中です",
+  "The photos are imported once it ends": "終わりしだい写真を読み込みます",
   "An import is running. Drop photos when it has finished": "読み込み中です。完了してから写真をドロップしてください",
   "Finish Lightroom catalog import before adding photos": "写真を追加する前に Lightroom カタログの読み込みを完了してください"
 }

crates/ui-egui/locales/ka.json

@@ -2733,6 +2733,7 @@
   "Dropped Files": "ჩაგდებული ფაილები",
   "Import dropped files without review": "ჩაგდებული ფაილების იმპორტი გადახედვის გარეშე",
   "An import is running": "იმპორტი მიმდინარეობს",
+  "The photos are imported once it ends": "ფოტოები ამის შემდეგ შემოიტანება",
   "An import is running. Drop photos when it has finished": "იმპორტი მიმდინარეობს. ფოტოები ჩააგდეთ, როცა დასრულდება",
   "Finish Lightroom catalog import before adding photos": "ფოტოების დამატებამდე დაასრულეთ Lightroom-ის კატალოგის იმპორტი"
 }

crates/ui-egui/locales/pl.json

@@ -2282,6 +2282,7 @@
   "Dropped Files": "Upuszczone pliki",
   "Import dropped files without review": "Importuj upuszczone pliki bez przeglądu",
   "An import is running": "Import jest w toku",
+  "The photos are imported once it ends": "Zdjęcia zostaną zaimportowane potem",
   "An import is running. Drop photos when it has finished": "Import jest w toku. Upuść zdjęcia, gdy się zakończy",
   "Finish Lightroom catalog import before adding photos": "Zakończ import katalogu Lightrooma, zanim dodasz zdjęcia"
 }

crates/ui-egui/locales/pt-br.json

@@ -2201,6 +2201,7 @@
   "Dropped Files": "Arquivos soltos",
   "Import dropped files without review": "Importar arquivos soltos sem revisão",
   "An import is running": "Uma importação está em andamento",
+  "The photos are imported once it ends": "As fotos serão importadas depois",
   "An import is running. Drop photos when it has finished": "Uma importação está em andamento. Solte as fotos quando ela terminar",
   "Finish Lightroom catalog import before adding photos": "Conclua a importação do catálogo do Lightroom antes de adicionar fotos"
 }

crates/ui-egui/locales/ru.json

@@ -2348,6 +2348,7 @@
   "Dropped Files": "Перетащенные файлы",
   "Import dropped files without review": "Импортировать перетащенные файлы без проверки",
   "An import is running": "Импорт уже выполняется",
+  "The photos are imported once it ends": "Фото будут импортированы после этого",
   "An import is running. Drop photos when it has finished": "Импорт уже выполняется. Перетащите фото, когда он закончится",
   "Finish Lightroom catalog import before adding photos": "Завершите импорт каталога Lightroom, прежде чем добавлять фото"
 }

crates/ui-egui/locales/sv.json

@@ -2422,6 +2422,7 @@
   "Mask Pins": "Masknålar",
   "Photo Counts": "Antal foton",
   "An import is running": "En import pågår",
+  "The photos are imported once it ends": "Bilderna importeras efteråt",
   "An import is running. Drop photos when it has finished": "En import pågår. Släpp fotona när den är klar",
   "Close the open dialog to drop files here": "Stäng den öppna dialogrutan för att släppa filer här",
   "Close the open dialog, then drop the files again": "Stäng den öppna dialogrutan och släpp sedan filerna igen",

crates/ui-egui/locales/uk.json

@@ -2353,6 +2353,7 @@
   "Dropped Files": "Перетягнуті файли",
   "Import dropped files without review": "Імпортувати перетягнуті файли без перегляду",
   "An import is running": "Імпорт уже виконується",
+  "The photos are imported once it ends": "Фото буде імпортовано після цього",
   "An import is running. Drop photos when it has finished": "Імпорт уже виконується. Перетягніть фото, коли він завершиться",
   "Finish Lightroom catalog import before adding photos": "Завершіть імпорт каталогу Lightroom, перш ніж додавати фото"
 }

crates/ui-egui/locales/vi.json

@@ -2228,6 +2228,7 @@
   "Mask Pins": "Ghim mặt nạ",
   "Photo Counts": "Số lượng ảnh",
   "An import is running": "Đang có một lần nhập chạy",
+  "The photos are imported once it ends": "Ảnh sẽ được nhập khi việc đó kết thúc",
   "An import is running. Drop photos when it has finished": "Đang có một lần nhập chạy. Hãy thả ảnh khi nó hoàn tất",
   "Close the open dialog to drop files here": "Hãy đóng hộp thoại đang mở để thả tệp vào đây",
   "Close the open dialog, then drop the files again": "Hãy đóng hộp thoại đang mở, rồi thả lại các tệp",

crates/ui-egui/locales/zh-hans.json

@@ -2199,6 +2199,7 @@
   "Dropped Files": "拖入的文件",
   "Import dropped files without review": "不经检查直接导入拖入的文件",
   "An import is running": "正在导入",
+  "The photos are imported once it ends": "结束后即导入这些照片",
   "An import is running. Drop photos when it has finished": "正在导入。导入完成后再拖放照片",
   "Finish Lightroom catalog import before adding photos": "添加照片前，请先完成 Lightroom 目录的导入"
 }

crates/ui-egui/locales/zh-hant.json

@@ -2156,6 +2156,7 @@
   "Dropped Files": "拖放的檔案",
   "Import dropped files without review": "不經檢查直接匯入拖放的檔案",
   "An import is running": "正在匯入",
+  "The photos are imported once it ends": "結束後即匯入這些照片",
   "An import is running. Drop photos when it has finished": "正在匯入。匯入完成後再拖放照片",
   "Finish Lightroom catalog import before adding photos": "新增照片前，請先完成 Lightroom 目錄的匯入"
 }

crates/ui-egui/src/app.rs

@@ -102,6 +102,7 @@ impl LightcraftApp {
             merge: merge::MergeState::default(),
             import: None,
             scan: None,
+            waiting_import: Default::default(),
             sync: None,
             sync_owns_changes: false,
             sync_run: None,

crates/ui-egui/src/lib.rs

@@ -298,6 +298,8 @@ pub struct LightcraftApp {
     pub import: Option<import::ImportTask>,
     /// A folder scan in progress (feeds the import review).
     pub scan: Option<import::ScanTask>,
+    /// Files that waited for a library and wait for the running import or Synchronize Folder too.
+    pub waiting_import: panels::library_problem::WaitingImport,
     /// A Synchronize Folder scan in progress (feeds its dialog).
     pub sync: Option<sync::SyncTask>,
     /// `session.folder_changes` came from the Synchronize Folder dialog (and goes with it).

crates/ui-egui/src/panels/library_problem.rs

@@ -327,6 +327,16 @@ pub struct Chooser {
     pub over: Option<u64>,
 }
 
+/// Files that waited for a library (the command line, drops on the launch list) and found another
+/// import or a Synchronize Folder running when one opened: kept, and imported once it ends instead
+/// of being lost (issue #2779).
+#[derive(Clone, Debug, Default, PartialEq)]
+pub struct WaitingImport {
+    pub files: Vec<String>,
+    /// The toast already said why they wait.
+    told: bool,
+}
+
 /// A library that failed to open (set by the host at launch).
 #[derive(Clone, Debug, Default, PartialEq)]
 pub struct LibraryProblem {
@@ -783,12 +793,7 @@ fn open(app: &mut LightcraftApp, path: Option<String>) {
         Ok(serde_json::Value::Null) => {} // folder dialog cancelled
         Ok(_) => {
             let files = app.library_problem.take().map(|p| p.pending_import).unwrap_or_default();
-            // in the background, like files dropped on the window (issue #374)
-            if !files.is_empty()
-                && let Err(e) = crate::import::start_paths(app, files)
-            {
-                log::warn!("import: {e}");
-            }
+            app.waiting_import.files.extend(files);
         }
         Err(e) => {
             // a failed switch reopens the library that was open behind the launch list
@@ -816,6 +821,26 @@ fn open(app: &mut LightcraftApp, path: Option<String>) {
     }
 }
 
+/// Import the files that waited for a library, in the background like files dropped on the window
+/// (issue #374). While another import or a Synchronize Folder runs they keep waiting, and a toast
+/// says why once (issue #2779).
+fn import_waiting(app: &mut LightcraftApp, ctx: &egui::Context) {
+    if app.waiting_import.files.is_empty() {
+        return;
+    }
+    let files = std::mem::take(&mut app.waiting_import.files);
+    match crate::import::start_paths(app, files.clone()) {
+        Ok(_) => app.waiting_import = WaitingImport::default(),
+        Err(e) => {
+            if !app.waiting_import.told {
+                app.toast(ctx, format!("{e}. {}", crate::i18n::tr("The photos are imported once it ends")));
+            }
+            app.waiting_import = WaitingImport { files, told: true };
+            ctx.request_repaint_after(std::time::Duration::from_millis(250));
+        }
+    }
+}
+
 /// Clear the problem once a library is open (e.g. through Settings → Open Library…) — another
 /// one than the launch list was opened over; offer the list when Alt/Option is held as the window
 /// appears; and the list's keys.
@@ -827,12 +852,9 @@ pub fn logic(app: &mut LightcraftApp, ctx: &egui::Context) {
         // files from the command line go into the library opened another way (New Library…,
         // File ▸ Open Library…), as through the window's own buttons
         let files = app.library_problem.take().map(|p| p.pending_import).unwrap_or_default();
-        if !files.is_empty()
-            && let Err(e) = crate::import::start_paths(app, files)
-        {
-            log::warn!("import: {e}");
-        }
+        app.waiting_import.files.extend(files);
     }
+    import_waiting(app, ctx);
     let batch_in_flight = app.synthetic_in_flight;
     alt_at_launch(app, ctx);
     // Alt/Option can create the launch list here, after the frame's input was accepted. Drop
@@ -1111,12 +1133,7 @@ fn act(app: &mut LightcraftApp, choice: Choice) {
                 p.dismissed = true;
             }
             let files = app.library_problem.as_mut().map(|p| std::mem::take(&mut p.pending_import)).unwrap_or_default();
-            // in the background, like files dropped on the window (issue #374)
-            if !files.is_empty()
-                && let Err(e) = crate::import::start_paths(app, files)
-            {
-                log::warn!("import: {e}");
-            }
+            app.waiting_import.files.extend(files);
         }
         Choice::Quit => app.ui.quit = true,
     }

crates/ui-egui/src/tests/library_problem.rs

@@ -804,3 +804,42 @@ fn typing_reaches_the_launch_lists_own_new_library_prompt() {
     assert_eq!(command, "app.newLibrary");
     assert_eq!(value, "Fresh", "typing reaches the launch list's own text prompt");
 }
+
+/// Issue #2779: files waiting for a library (the command line, drops on the launch list) that
+/// find another import running when a library opens are kept, with a toast saying why, and
+/// imported once that import ends instead of being dropped.
+#[test]
+fn waiting_files_wait_for_a_running_import_instead_of_being_dropped() {
+    let dir = std::env::temp_dir().join(format!("lightcraft-waiting-import-{}", std::process::id()));
+    let _ = std::fs::remove_dir_all(&dir);
+    std::fs::create_dir_all(&dir).unwrap();
+    let png = |v: u8| {
+        let img = lightcraft_raster::Rgba8 { width: 8, height: 8, data: vec![[v, 3, 9, 255]; 64] };
+        lightcraft_codecs::encode_png(&lightcraft_codecs::EncodeImage::rgba8(&img), &lightcraft_codecs::EncodeMeta::default()).unwrap()
+    };
+    let (busy, waiting) = (dir.join("busy.png"), dir.join("waiting.png"));
+    std::fs::write(&busy, png(10)).unwrap();
+    std::fs::write(&waiting, png(200)).unwrap();
+
+    let app = LightcraftApp::new(lightcraft_engine::Session::new().with_fs(), Services { png: None, ..Default::default() });
+    let mut h = Headless::new(app, [1300.0, 900.0], 1.0);
+    let lib = dir.join("lib");
+    h.app.library_problem = Some(LibraryProblem {
+        pending_import: vec![waiting.to_string_lossy().to_string()],
+        ..LibraryProblem::new(lib.to_string_lossy(), "a test error")
+    });
+    h.step();
+    // a library opens another way (File ▸ Open Library…) while an import is running
+    h.app.session.open_library(&lib, false).unwrap();
+    crate::import::start_paths(&mut h.app, vec![busy.to_string_lossy().to_string()]).unwrap();
+    h.step();
+    assert!(h.app.library_problem.is_none(), "the problem is over");
+    assert_eq!(h.app.waiting_import.files, vec![waiting.to_string_lossy().to_string()], "the waiting file is kept");
+    let toast = h.app.ui.toast.as_ref().map(|t| t.0.clone()).unwrap_or_default();
+    assert!(toast.contains("An import is running") && toast.contains("once it ends"), "{toast}");
+
+    assert!(h.step_until(T, |h| h.app.import.is_none() && h.app.session.catalog.len() == 2), "{} photos", h.app.session.catalog.len());
+    assert!(h.app.waiting_import.files.is_empty());
+    let _ = h.app.session.close_library();
+    let _ = std::fs::remove_dir_all(&dir);
+}

docs/whats-new.md

@@ -1,5 +1,12 @@
 # What's new in LightCraft
 
+## 2026-10-30
+
+### Photos waiting for a library wait for a running import too
+- Photos given on the command line or dropped on the launch list are imported once a library opens. If another import
+  or a Synchronize Folder is still running then, they now wait for it to end instead of being dropped, and a message
+  says so (issue #2779).
+
 ## 2026-10-24
 
 ### Relative-date filters and smart albums follow the clock