Merge pull request #1777 from ramox81/codex/refedit-dialog

REFEDIT: Reference Edit dialog and unique names for xref objects

# Conflicts:
#	locales/ar-SA/opencadstudio.ftl
#	locales/bg-BG/opencadstudio.ftl
#	locales/cs-CZ/opencadstudio.ftl
#	locales/de-DE/opencadstudio.ftl
#	locales/el-GR/opencadstudio.ftl
#	locales/en-US/opencadstudio.ftl
#	locales/es-ES/opencadstudio.ftl
#	locales/fi-FI/opencadstudio.ftl
#	locales/fr-FR/opencadstudio.ftl
#	locales/hi-IN/opencadstudio.ftl
#	locales/hu-HU/opencadstudio.ftl
#	locales/it-IT/opencadstudio.ftl
#	locales/ja-JP/opencadstudio.ftl
#	locales/ko-KR/opencadstudio.ftl
#	locales/lo-LA/opencadstudio.ftl
#	locales/nl-NL/opencadstudio.ftl
#	locales/pl-PL/opencadstudio.ftl
#	locales/pt-BR/opencadstudio.ftl
#	locales/ru-RU/opencadstudio.ftl
#	locales/tr-TR/opencadstudio.ftl
#	locales/zh-CN/opencadstudio.ftl
#	locales/zh-TW/opencadstudio.ftl
#	src/app/control/actions.rs
#	src/app/mod.rs
#	src/app/view/modal.rs

locales/ar-SA/opencadstudio.ftl

@@ -6487,6 +6487,19 @@ ref-edit =
     .add-to-working-set = إضافة إلى مجموعة العمل
     .remove-from-working-set = إزالة من مجموعة العمل
     .toolbar-objects = كائنات
+    .dialog-title = Reference Edit
+    .dialog-reference = Reference to edit
+    .dialog-chain-hint = The chain at the picked point; click a chip to change the level.
+    .dialog-path = Path:
+    .dialog-working-set = Working set
+    .dialog-all-objects = All objects
+    .dialog-pick-objects = Pick in the drawing
+    .dialog-attributes = Also edit attribute definitions
+    .dialog-session = Session
+    .dialog-lock = Lock objects not in the working set
+    .dialog-unique = Give clashing layer, style and block names unique names
+    .dialog-start = Start Editing
+    .dialog-help = Checks out a block reference or an external reference for editing in place.
     .select-reference = حدد المرجع:
     .reference-not-found = لم يتم العثور على المرجع.
     .not-valid-reference = الكائن ليس مرجعًا صالحًا

locales/bg-BG/opencadstudio.ftl

@@ -6475,6 +6475,19 @@ ref-edit =
     .add-to-working-set = Добави към работния набор
     .remove-from-working-set = Премахни от работния набор
     .toolbar-objects = обекта
+    .dialog-title = Reference Edit
+    .dialog-reference = Reference to edit
+    .dialog-chain-hint = The chain at the picked point; click a chip to change the level.
+    .dialog-path = Path:
+    .dialog-working-set = Working set
+    .dialog-all-objects = All objects
+    .dialog-pick-objects = Pick in the drawing
+    .dialog-attributes = Also edit attribute definitions
+    .dialog-session = Session
+    .dialog-lock = Lock objects not in the working set
+    .dialog-unique = Give clashing layer, style and block names unique names
+    .dialog-start = Start Editing
+    .dialog-help = Checks out a block reference or an external reference for editing in place.
     .select-reference = Изберете препратка:
     .reference-not-found = Препратката не е намерена.
     .not-valid-reference = Обектът не е валидна препратка

locales/cs-CZ/opencadstudio.ftl

@@ -6472,6 +6472,19 @@ ref-edit =
     .add-to-working-set = Přidat do pracovní sady
     .remove-from-working-set = Odebrat z pracovní sady
     .toolbar-objects = objektů
+    .dialog-title = Reference Edit
+    .dialog-reference = Reference to edit
+    .dialog-chain-hint = The chain at the picked point; click a chip to change the level.
+    .dialog-path = Path:
+    .dialog-working-set = Working set
+    .dialog-all-objects = All objects
+    .dialog-pick-objects = Pick in the drawing
+    .dialog-attributes = Also edit attribute definitions
+    .dialog-session = Session
+    .dialog-lock = Lock objects not in the working set
+    .dialog-unique = Give clashing layer, style and block names unique names
+    .dialog-start = Start Editing
+    .dialog-help = Checks out a block reference or an external reference for editing in place.
     .select-reference = Vyberte referenci:
     .reference-not-found = Reference nebyla nalezena.
     .not-valid-reference = Objekt není platná reference

locales/de-DE/opencadstudio.ftl

@@ -6473,6 +6473,19 @@ ref-edit =
     .add-to-working-set = Zum Arbeitssatz hinzufügen
     .remove-from-working-set = Aus dem Arbeitssatz entfernen
     .toolbar-objects = Objekte
+    .dialog-title = Reference Edit
+    .dialog-reference = Reference to edit
+    .dialog-chain-hint = The chain at the picked point; click a chip to change the level.
+    .dialog-path = Path:
+    .dialog-working-set = Working set
+    .dialog-all-objects = All objects
+    .dialog-pick-objects = Pick in the drawing
+    .dialog-attributes = Also edit attribute definitions
+    .dialog-session = Session
+    .dialog-lock = Lock objects not in the working set
+    .dialog-unique = Give clashing layer, style and block names unique names
+    .dialog-start = Start Editing
+    .dialog-help = Checks out a block reference or an external reference for editing in place.
     .select-reference = Referenz wählen:
     .reference-not-found = Referenz nicht gefunden.
     .not-valid-reference = Objekt ist keine gültige Referenz

locales/el-GR/opencadstudio.ftl

@@ -6475,6 +6475,19 @@ ref-edit =
     .add-to-working-set = Προσθήκη στο σύνολο εργασίας
     .remove-from-working-set = Αφαίρεση από το σύνολο εργασίας
     .toolbar-objects = αντικείμενα
+    .dialog-title = Reference Edit
+    .dialog-reference = Reference to edit
+    .dialog-chain-hint = The chain at the picked point; click a chip to change the level.
+    .dialog-path = Path:
+    .dialog-working-set = Working set
+    .dialog-all-objects = All objects
+    .dialog-pick-objects = Pick in the drawing
+    .dialog-attributes = Also edit attribute definitions
+    .dialog-session = Session
+    .dialog-lock = Lock objects not in the working set
+    .dialog-unique = Give clashing layer, style and block names unique names
+    .dialog-start = Start Editing
+    .dialog-help = Checks out a block reference or an external reference for editing in place.
     .select-reference = Επιλέξτε αναφορά:
     .reference-not-found = Η αναφορά δεν βρέθηκε.
     .not-valid-reference = Το αντικείμενο δεν είναι έγκυρη αναφορά

locales/en-US/opencadstudio.ftl

@@ -6474,6 +6474,19 @@ ref-edit =
     .add-to-working-set = Add to Working Set
     .remove-from-working-set = Remove from Working Set
     .toolbar-objects = objects
+    .dialog-title = Reference Edit
+    .dialog-reference = Reference to edit
+    .dialog-chain-hint = The chain at the picked point; click a chip to change the level.
+    .dialog-path = Path:
+    .dialog-working-set = Working set
+    .dialog-all-objects = All objects
+    .dialog-pick-objects = Pick in the drawing
+    .dialog-attributes = Also edit attribute definitions
+    .dialog-session = Session
+    .dialog-lock = Lock objects not in the working set
+    .dialog-unique = Give clashing layer, style and block names unique names
+    .dialog-start = Start Editing
+    .dialog-help = Checks out a block reference or an external reference for editing in place.
     .select-reference = Select reference:
     .reference-not-found = Reference not found.
     .not-valid-reference = Object is not a valid reference

locales/es-ES/opencadstudio.ftl

@@ -6475,6 +6475,19 @@ ref-edit =
     .add-to-working-set = Añadir al conjunto de trabajo
     .remove-from-working-set = Eliminar del conjunto de trabajo
     .toolbar-objects = objetos
+    .dialog-title = Reference Edit
+    .dialog-reference = Reference to edit
+    .dialog-chain-hint = The chain at the picked point; click a chip to change the level.
+    .dialog-path = Path:
+    .dialog-working-set = Working set
+    .dialog-all-objects = All objects
+    .dialog-pick-objects = Pick in the drawing
+    .dialog-attributes = Also edit attribute definitions
+    .dialog-session = Session
+    .dialog-lock = Lock objects not in the working set
+    .dialog-unique = Give clashing layer, style and block names unique names
+    .dialog-start = Start Editing
+    .dialog-help = Checks out a block reference or an external reference for editing in place.
     .select-reference = Seleccione la referencia:
     .reference-not-found = No se encuentra la referencia.
     .not-valid-reference = El objeto no es una referencia válida

locales/fi-FI/opencadstudio.ftl

@@ -6472,6 +6472,19 @@ ref-edit =
     .add-to-working-set = Lisää työjoukkoon
     .remove-from-working-set = Poista työjoukosta
     .toolbar-objects = objektia
+    .dialog-title = Reference Edit
+    .dialog-reference = Reference to edit
+    .dialog-chain-hint = The chain at the picked point; click a chip to change the level.
+    .dialog-path = Path:
+    .dialog-working-set = Working set
+    .dialog-all-objects = All objects
+    .dialog-pick-objects = Pick in the drawing
+    .dialog-attributes = Also edit attribute definitions
+    .dialog-session = Session
+    .dialog-lock = Lock objects not in the working set
+    .dialog-unique = Give clashing layer, style and block names unique names
+    .dialog-start = Start Editing
+    .dialog-help = Checks out a block reference or an external reference for editing in place.
     .select-reference = Valitse viittaus:
     .reference-not-found = Viittausta ei löydy.
     .not-valid-reference = Objekti ei ole kelvollinen viittaus

locales/fr-FR/opencadstudio.ftl

@@ -6475,6 +6475,19 @@ ref-edit =
     .add-to-working-set = Ajouter au jeu de travail
     .remove-from-working-set = Supprimer du jeu de travail
     .toolbar-objects = objets
+    .dialog-title = Reference Edit
+    .dialog-reference = Reference to edit
+    .dialog-chain-hint = The chain at the picked point; click a chip to change the level.
+    .dialog-path = Path:
+    .dialog-working-set = Working set
+    .dialog-all-objects = All objects
+    .dialog-pick-objects = Pick in the drawing
+    .dialog-attributes = Also edit attribute definitions
+    .dialog-session = Session
+    .dialog-lock = Lock objects not in the working set
+    .dialog-unique = Give clashing layer, style and block names unique names
+    .dialog-start = Start Editing
+    .dialog-help = Checks out a block reference or an external reference for editing in place.
     .select-reference = Sélectionnez la référence :
     .reference-not-found = Référence introuvable.
     .not-valid-reference = L'objet n'est pas une référence valide

locales/hi-IN/opencadstudio.ftl

@@ -6463,6 +6463,19 @@ ref-edit =
     .add-to-working-set = कार्य सेट में जोड़ें
     .remove-from-working-set = कार्य सेट से हटाएँ
     .toolbar-objects = ऑब्जेक्ट
+    .dialog-title = Reference Edit
+    .dialog-reference = Reference to edit
+    .dialog-chain-hint = The chain at the picked point; click a chip to change the level.
+    .dialog-path = Path:
+    .dialog-working-set = Working set
+    .dialog-all-objects = All objects
+    .dialog-pick-objects = Pick in the drawing
+    .dialog-attributes = Also edit attribute definitions
+    .dialog-session = Session
+    .dialog-lock = Lock objects not in the working set
+    .dialog-unique = Give clashing layer, style and block names unique names
+    .dialog-start = Start Editing
+    .dialog-help = Checks out a block reference or an external reference for editing in place.
     .select-reference = संदर्भ चुनें:
     .reference-not-found = संदर्भ नहीं मिला।
     .not-valid-reference = ऑब्जेक्ट मान्य संदर्भ नहीं है

locales/hu-HU/opencadstudio.ftl

@@ -6459,6 +6459,19 @@ ref-edit =
     .add-to-working-set = Hozzáadás a munkakészlethez
     .remove-from-working-set = Eltávolítás a munkakészletből
     .toolbar-objects = objektum
+    .dialog-title = Reference Edit
+    .dialog-reference = Reference to edit
+    .dialog-chain-hint = The chain at the picked point; click a chip to change the level.
+    .dialog-path = Path:
+    .dialog-working-set = Working set
+    .dialog-all-objects = All objects
+    .dialog-pick-objects = Pick in the drawing
+    .dialog-attributes = Also edit attribute definitions
+    .dialog-session = Session
+    .dialog-lock = Lock objects not in the working set
+    .dialog-unique = Give clashing layer, style and block names unique names
+    .dialog-start = Start Editing
+    .dialog-help = Checks out a block reference or an external reference for editing in place.
     .select-reference = Válassza ki a hivatkozást:
     .reference-not-found = A hivatkozás nem található.
     .not-valid-reference = Az objektum nem érvényes hivatkozás

locales/it-IT/opencadstudio.ftl

@@ -6474,6 +6474,19 @@ ref-edit =
     .add-to-working-set = Aggiungi al gruppo di lavoro
     .remove-from-working-set = Rimuovi dal gruppo di lavoro
     .toolbar-objects = oggetti
+    .dialog-title = Reference Edit
+    .dialog-reference = Reference to edit
+    .dialog-chain-hint = The chain at the picked point; click a chip to change the level.
+    .dialog-path = Path:
+    .dialog-working-set = Working set
+    .dialog-all-objects = All objects
+    .dialog-pick-objects = Pick in the drawing
+    .dialog-attributes = Also edit attribute definitions
+    .dialog-session = Session
+    .dialog-lock = Lock objects not in the working set
+    .dialog-unique = Give clashing layer, style and block names unique names
+    .dialog-start = Start Editing
+    .dialog-help = Checks out a block reference or an external reference for editing in place.
     .select-reference = Selezionare il riferimento:
     .reference-not-found = Riferimento non trovato.
     .not-valid-reference = L'oggetto non è un riferimento valido

locales/ja-JP/opencadstudio.ftl

@@ -6463,6 +6463,19 @@ ref-edit =
     .add-to-working-set = 作業セットに追加
     .remove-from-working-set = 作業セットから除去
     .toolbar-objects = 個のオブジェクト
+    .dialog-title = Reference Edit
+    .dialog-reference = Reference to edit
+    .dialog-chain-hint = The chain at the picked point; click a chip to change the level.
+    .dialog-path = Path:
+    .dialog-working-set = Working set
+    .dialog-all-objects = All objects
+    .dialog-pick-objects = Pick in the drawing
+    .dialog-attributes = Also edit attribute definitions
+    .dialog-session = Session
+    .dialog-lock = Lock objects not in the working set
+    .dialog-unique = Give clashing layer, style and block names unique names
+    .dialog-start = Start Editing
+    .dialog-help = Checks out a block reference or an external reference for editing in place.
     .select-reference = 参照を選択:
     .reference-not-found = 参照が見つかりません。
     .not-valid-reference = オブジェクトは有効な参照ではありません

locales/ko-KR/opencadstudio.ftl

@@ -6474,6 +6474,19 @@ ref-edit =
     .add-to-working-set = 작업 세트에 추가
     .remove-from-working-set = 작업 세트에서 제거
     .toolbar-objects = 개 객체
+    .dialog-title = Reference Edit
+    .dialog-reference = Reference to edit
+    .dialog-chain-hint = The chain at the picked point; click a chip to change the level.
+    .dialog-path = Path:
+    .dialog-working-set = Working set
+    .dialog-all-objects = All objects
+    .dialog-pick-objects = Pick in the drawing
+    .dialog-attributes = Also edit attribute definitions
+    .dialog-session = Session
+    .dialog-lock = Lock objects not in the working set
+    .dialog-unique = Give clashing layer, style and block names unique names
+    .dialog-start = Start Editing
+    .dialog-help = Checks out a block reference or an external reference for editing in place.
     .select-reference = 참조 선택:
     .reference-not-found = 참조를 찾을 수 없습니다.
     .not-valid-reference = 객체가 유효한 참조가 아닙니다

locales/lo-LA/opencadstudio.ftl

@@ -6475,6 +6475,19 @@ ref-edit =
     .add-to-working-set = ເພີ່ມໃສ່ຊຸດເຮັດວຽກ
     .remove-from-working-set = ລຶບອອກຈາກຊຸດເຮັດວຽກ
     .toolbar-objects = ວັດຖຸ
+    .dialog-title = Reference Edit
+    .dialog-reference = Reference to edit
+    .dialog-chain-hint = The chain at the picked point; click a chip to change the level.
+    .dialog-path = Path:
+    .dialog-working-set = Working set
+    .dialog-all-objects = All objects
+    .dialog-pick-objects = Pick in the drawing
+    .dialog-attributes = Also edit attribute definitions
+    .dialog-session = Session
+    .dialog-lock = Lock objects not in the working set
+    .dialog-unique = Give clashing layer, style and block names unique names
+    .dialog-start = Start Editing
+    .dialog-help = Checks out a block reference or an external reference for editing in place.
     .select-reference = ເລືອກການອ້າງອີງ:
     .reference-not-found = ບໍ່ພົບການອ້າງອີງ.
     .not-valid-reference = ວັດຖຸບໍ່ແມ່ນການອ້າງອີງທີ່ຖືກຕ້ອງ

locales/nl-NL/opencadstudio.ftl

@@ -6473,6 +6473,19 @@ ref-edit =
     .add-to-working-set = Toevoegen aan werkset
     .remove-from-working-set = Verwijderen uit werkset
     .toolbar-objects = objecten
+    .dialog-title = Reference Edit
+    .dialog-reference = Reference to edit
+    .dialog-chain-hint = The chain at the picked point; click a chip to change the level.
+    .dialog-path = Path:
+    .dialog-working-set = Working set
+    .dialog-all-objects = All objects
+    .dialog-pick-objects = Pick in the drawing
+    .dialog-attributes = Also edit attribute definitions
+    .dialog-session = Session
+    .dialog-lock = Lock objects not in the working set
+    .dialog-unique = Give clashing layer, style and block names unique names
+    .dialog-start = Start Editing
+    .dialog-help = Checks out a block reference or an external reference for editing in place.
     .select-reference = Selecteer referentie:
     .reference-not-found = Referentie niet gevonden.
     .not-valid-reference = Object is geen geldige referentie

locales/pl-PL/opencadstudio.ftl

@@ -6474,6 +6474,19 @@ ref-edit =
     .add-to-working-set = Dodaj do zbioru roboczego
     .remove-from-working-set = Usuń ze zbioru roboczego
     .toolbar-objects = obiekty
+    .dialog-title = Reference Edit
+    .dialog-reference = Reference to edit
+    .dialog-chain-hint = The chain at the picked point; click a chip to change the level.
+    .dialog-path = Path:
+    .dialog-working-set = Working set
+    .dialog-all-objects = All objects
+    .dialog-pick-objects = Pick in the drawing
+    .dialog-attributes = Also edit attribute definitions
+    .dialog-session = Session
+    .dialog-lock = Lock objects not in the working set
+    .dialog-unique = Give clashing layer, style and block names unique names
+    .dialog-start = Start Editing
+    .dialog-help = Checks out a block reference or an external reference for editing in place.
     .select-reference = Wybierz odnośnik:
     .reference-not-found = Nie znaleziono odnośnika.
     .not-valid-reference = Obiekt nie jest prawidłowym odnośnikiem

locales/pt-BR/opencadstudio.ftl

@@ -6475,6 +6475,19 @@ ref-edit =
     .add-to-working-set = Adicionar ao conjunto de trabalho
     .remove-from-working-set = Remover do conjunto de trabalho
     .toolbar-objects = objetos
+    .dialog-title = Reference Edit
+    .dialog-reference = Reference to edit
+    .dialog-chain-hint = The chain at the picked point; click a chip to change the level.
+    .dialog-path = Path:
+    .dialog-working-set = Working set
+    .dialog-all-objects = All objects
+    .dialog-pick-objects = Pick in the drawing
+    .dialog-attributes = Also edit attribute definitions
+    .dialog-session = Session
+    .dialog-lock = Lock objects not in the working set
+    .dialog-unique = Give clashing layer, style and block names unique names
+    .dialog-start = Start Editing
+    .dialog-help = Checks out a block reference or an external reference for editing in place.
     .select-reference = Selecione a referência:
     .reference-not-found = Referência não encontrada.
     .not-valid-reference = O objeto não é uma referência válida

locales/ru-RU/opencadstudio.ftl

@@ -6476,6 +6476,19 @@ ref-edit =
     .add-to-working-set = Добавить в рабочий набор
     .remove-from-working-set = Удалить из рабочего набора
     .toolbar-objects = объектов
+    .dialog-title = Reference Edit
+    .dialog-reference = Reference to edit
+    .dialog-chain-hint = The chain at the picked point; click a chip to change the level.
+    .dialog-path = Path:
+    .dialog-working-set = Working set
+    .dialog-all-objects = All objects
+    .dialog-pick-objects = Pick in the drawing
+    .dialog-attributes = Also edit attribute definitions
+    .dialog-session = Session
+    .dialog-lock = Lock objects not in the working set
+    .dialog-unique = Give clashing layer, style and block names unique names
+    .dialog-start = Start Editing
+    .dialog-help = Checks out a block reference or an external reference for editing in place.
     .select-reference = Выберите ссылку:
     .reference-not-found = Ссылка не найдена.
     .not-valid-reference = Объект не является допустимой ссылкой

locales/tr-TR/opencadstudio.ftl

@@ -6396,6 +6396,19 @@ ref-edit =
     .add-to-working-set = Çalışma Kümesine Ekle
     .remove-from-working-set = Çalışma Kümesinden Çıkar
     .toolbar-objects = nesne
+    .dialog-title = Referansı Düzenle
+    .dialog-reference = Düzenlenecek referans
+    .dialog-chain-hint = Seçilen noktadaki zincir; bir çipe tıklayarak düzeyi değiştirin.
+    .dialog-path = Yol:
+    .dialog-working-set = Çalışma kümesi
+    .dialog-all-objects = Tüm nesneler
+    .dialog-pick-objects = Çizimde seçeceğim
+    .dialog-attributes = Öznitelik tanımlarını da düzenle
+    .dialog-session = Oturum
+    .dialog-lock = Kümede olmayan nesneleri kilitle
+    .dialog-unique = Çakışan katman, stil ve blok adlarını benzersiz yap
+    .dialog-start = Düzenlemeye Başla
+    .dialog-help = Bir blok referansını veya dış referansı yerinde düzenlemek için açar.
     .select-reference = Referans seçin:
     .reference-not-found = Referans bulunamadı.
     .not-valid-reference = Nesne geçerli bir referans değil

locales/zh-CN/opencadstudio.ftl

@@ -6458,6 +6458,19 @@ ref-edit =
     .add-to-working-set = 添加到工作集
     .remove-from-working-set = 从工作集删除
     .toolbar-objects = 个对象
+    .dialog-title = Reference Edit
+    .dialog-reference = Reference to edit
+    .dialog-chain-hint = The chain at the picked point; click a chip to change the level.
+    .dialog-path = Path:
+    .dialog-working-set = Working set
+    .dialog-all-objects = All objects
+    .dialog-pick-objects = Pick in the drawing
+    .dialog-attributes = Also edit attribute definitions
+    .dialog-session = Session
+    .dialog-lock = Lock objects not in the working set
+    .dialog-unique = Give clashing layer, style and block names unique names
+    .dialog-start = Start Editing
+    .dialog-help = Checks out a block reference or an external reference for editing in place.
     .select-reference = 选择参照:
     .reference-not-found = 找不到参照。
     .not-valid-reference = 对象不是有效的参照

locales/zh-TW/opencadstudio.ftl

@@ -6470,6 +6470,19 @@ ref-edit =
     .add-to-working-set = 加入工作集
     .remove-from-working-set = 從工作集移除
     .toolbar-objects = 個物件
+    .dialog-title = Reference Edit
+    .dialog-reference = Reference to edit
+    .dialog-chain-hint = The chain at the picked point; click a chip to change the level.
+    .dialog-path = Path:
+    .dialog-working-set = Working set
+    .dialog-all-objects = All objects
+    .dialog-pick-objects = Pick in the drawing
+    .dialog-attributes = Also edit attribute definitions
+    .dialog-session = Session
+    .dialog-lock = Lock objects not in the working set
+    .dialog-unique = Give clashing layer, style and block names unique names
+    .dialog-start = Start Editing
+    .dialog-help = Checks out a block reference or an external reference for editing in place.
     .select-reference = 選取參考:
     .reference-not-found = 找不到參考。
     .not-valid-reference = 物件不是有效的參考

src/app/commands/refedit.rs

@@ -4,10 +4,11 @@
 
 use crate::app::{Message, OpenCADStudio};
 use crate::modules::draw::modify::refedit::{
-    apply_insert_inverse_transform, apply_insert_transform, level_hits,
+    apply_insert_inverse_transform, apply_insert_transform, level_hits, nesting_chain,
-    nesting_chain, RefCloseCommand, RefEditOptionsCommand, RefEditPickCommand, RefEditSession,
+    rename_symbols, ChainLevel, RefCloseCommand, RefEditNames, RefEditOptionsCommand,
-    RefSetCommand, NOT_CHECKED_OUT,
+    RefEditPickCommand, RefEditSession, RefSetCommand, SymbolKind, NOT_CHECKED_OUT,
 };
+use crate::ui::window::refedit_dialog::{RefEditDialogMsg, RefEditDialogState, RefEditLevel};
 use codec::{EntityType, Handle};
 use iced::Task;
 use std::collections::HashSet;
@@ -147,25 +148,127 @@ impl OpenCADStudio {
                 .iter()
                 .map(|level| level_hits(&self.tabs[i].scene.document, level))
                 .collect();
-            let command = RefEditOptionsCommand::new(top, chain, hits);
+            let command = RefEditOptionsCommand::new(
+                top,
+                chain,
+                hits,
+                self.refedit_options.lock,
+                self.refedit_options.unique_names,
+            );
             use crate::command::CadCommand;
             self.command_line.push_info(&command.prompt());
             self.tabs[i].active_cmd = Some(Box::new(command));
         } else {
-            // The dialog's defaults: the innermost reference, all objects,
+            self.open_refedit_dialog(i, top, chain);
-            // attribute definitions not displayed.
-            let path: Vec<String> = chain[1..]
-                .iter()
-                .map(|l| l.insert.value().to_string())
-                .collect();
-            let _ = self.dispatch_command(&format!(
-                "REFEDIT_BEGIN:{}:{}:0:",
-                top.value(),
-                path.join(",")
-            ));
         }
     }
 
+    /// The Edit Reference dialog over the picked chain: the innermost level
+    /// chosen, the remembered settings.
+    fn open_refedit_dialog(&mut self, i: usize, top: Handle, chain: Vec<ChainLevel>) {
+        let scene = &self.tabs[i].scene;
+        let document = &scene.document;
+        let levels = chain
+            .iter()
+            .map(|level| {
+                let record = document.block_records.get(&level.block_name);
+                RefEditLevel {
+                    insert: level.insert,
+                    name: level.block_name.clone(),
+                    wires: scene.block_preview_wires(&level.block_name),
+                    has_attdefs: record.is_some_and(|br| {
+                        br.entity_handles.iter().any(|h| {
+                            matches!(document.get_entity(*h), Some(EntityType::AttributeDefinition(_)))
+                        })
+                    }),
+                    xref_path: record
+                        .filter(|br| br.flags.is_xref || br.flags.is_xref_overlay)
+                        .map(|br| br.xref_path.clone())
+                        .filter(|p| !p.is_empty()),
+                }
+            })
+            .collect::<Vec<_>>();
+        let options = &self.refedit_options;
+        self.refedit_dialog = Some(RefEditDialogState {
+            top,
+            level: levels.len().saturating_sub(1),
+            levels,
+            chain,
+            nested: options.nested,
+            attributes: options.attributes,
+            lock: options.lock,
+            unique: options.unique_names,
+        });
+        self.active_modal = Some(crate::app::ModalKind::RefEdit);
+    }
+
+    pub(in crate::app) fn update_refedit_dialog(&mut self, message: RefEditDialogMsg) -> Task<Message> {
+        let Some(state) = self.refedit_dialog.as_mut() else {
+            return Task::none();
+        };
+        match message {
+            RefEditDialogMsg::Level(level) => {
+                state.level = level.min(state.levels.len().saturating_sub(1))
+            }
+            RefEditDialogMsg::Nested(on) => state.nested = on,
+            RefEditDialogMsg::Attributes(on) => state.attributes = on,
+            RefEditDialogMsg::Lock(on) => state.lock = on,
+            RefEditDialogMsg::Unique(on) => state.unique = on,
+            RefEditDialogMsg::Help => {
+                self.command_line
+                    .push_info(&crate::tr!("ref-edit", "dialog-help"));
+            }
+            RefEditDialogMsg::Ok => {
+                let Some(state) = self.refedit_dialog.take() else {
+                    return Task::none();
+                };
+                self.close_active_modal();
+                let attributes = state.attributes && state.attributes_enabled();
+                self.refedit_options = crate::app::settings::RefEditOptions {
+                    unique_names: state.unique,
+                    attributes: state.attributes,
+                    lock: state.lock,
+                    nested: state.nested,
+                };
+                let i = self.active_tab;
+                if state.nested {
+                    let hits = state
+                        .chain
+                        .iter()
+                        .map(|level| level_hits(&self.tabs[i].scene.document, level))
+                        .collect();
+                    let command = RefEditOptionsCommand::nested_pick(
+                        state.top,
+                        state.chain,
+                        hits,
+                        state.level,
+                        attributes,
+                        state.lock,
+                        state.unique,
+                    );
+                    use crate::command::CadCommand;
+                    self.command_line.push_info(&command.prompt());
+                    self.tabs[i].active_cmd = Some(Box::new(command));
+                } else {
+                    let last = state.level.min(state.chain.len().saturating_sub(1));
+                    let path: Vec<String> = state.chain[1..=last]
+                        .iter()
+                        .map(|l| l.insert.value().to_string())
+                        .collect();
+                    return self.dispatch_command(&format!(
+                        "REFEDIT_BEGIN:{}:{}:{}::{}:{}",
+                        state.top.value(),
+                        path.join(","),
+                        attributes as u8,
+                        state.lock as u8,
+                        state.unique as u8
+                    ));
+                }
+            }
+        }
+        Task::none()
+    }
+
     /// `top[:path[:attributes[:nested]]]` — open the session.
     fn begin_refedit(&mut self, i: usize, args: &str) {
         let mut parts = args.split(':');
@@ -186,6 +289,10 @@ impl OpenCADStudio {
         let path = handles(parts.next());
         let attributes = parts.next() == Some("1");
         let nested = handles(parts.next());
+        let lock = parts.next().map_or(self.refedit_options.lock, |v| v == "1");
+        let unique = parts
+            .next()
+            .map_or(self.refedit_options.unique_names, |v| v == "1");
         if self.tabs[i].refedit_session.is_some() || self.reject_locked_edit(i, top) {
             return;
         }
@@ -211,6 +318,15 @@ impl OpenCADStudio {
             });
         }
         let level = chain.last().expect("non-empty chain").clone();
+        // An external reference's dependent names (`XREF|NAME`) of the
+        // outermost xref in the chain.
+        let xref_prefix = chain.iter().find_map(|l| {
+            document
+                .block_records
+                .get(&l.block_name)
+                .filter(|br| br.flags.is_xref || br.flags.is_xref_overlay)
+                .map(|br| format!("{}|", br.name))
+        });
         let Some(br) = document.block_records.get(&level.block_name) else {
             return;
         };
@@ -245,6 +361,8 @@ impl OpenCADStudio {
             // Everything allocated from here on is part of the session.
             handle_watermark: document.next_handle().max(document.header.handle_seed),
             xref_path,
+            lock,
+            names: RefEditNames::default(),
         };
         let copies: Vec<EntityType> = extracted
             .iter()
@@ -252,6 +370,15 @@ impl OpenCADStudio {
             .collect();
 
         self.push_undo_snapshot(i, "REFEDIT");
+        let mut session = session;
+        let copies = match xref_prefix {
+            Some(prefix) => {
+                let (copies, names) = self.refedit_host_names(i, copies, &prefix, unique);
+                session.names = names;
+                copies
+            }
+            None => copies,
+        };
         let mut temp_handles = Vec::new();
         for mut entity in copies {
             apply_insert_transform(&mut entity, &session);
@@ -259,7 +386,6 @@ impl OpenCADStudio {
             entity.common_mut().owner_handle = Handle::NULL;
             temp_handles.push(self.tabs[i].scene.add_entity(entity));
         }
-        let mut session = session;
         session.temp_handles = temp_handles.clone();
         self.tabs[i].refedit_session = Some(session);
         self.tabs[i].refedit_closed.clear();
@@ -267,7 +393,7 @@ impl OpenCADStudio {
         self.tabs[i]
             .scene
             .set_refedit_keep(Some(temp_handles.iter().copied().collect::<rustc_hash::FxHashSet<_>>()));
-        self.tabs[i].scene.refedit_lock = true;
+        self.tabs[i].scene.refedit_lock = lock;
         self.tabs[i].scene.deselect_all();
         self.tabs[i].dirty = true;
         // No active command — the definition's objects are edited freely
@@ -375,6 +501,10 @@ impl OpenCADStudio {
             .iter()
             .filter_map(|h| self.tabs[i].scene.document.get_entity(*h).cloned())
             .map(|mut entity| {
+                // Back to the reference's own dependent names.
+                rename_symbols(&mut entity, &|kind, name| {
+                    session.names.original(kind, name).map(str::to_string)
+                });
                 apply_insert_inverse_transform(&mut entity, &session);
                 let mut entity = normalize_entity_for_block(entity);
                 entity.common_mut().handle = Handle::NULL;
@@ -457,6 +587,7 @@ impl OpenCADStudio {
     }
 
     fn finish_refedit_close(&mut self, i: usize, session: RefEditSession) {
+        self.drop_refedit_names(i, &session.names);
         self.tabs[i].refedit_closed.push(session);
         self.tabs[i].scene.refedit_lock = false;
         self.tabs[i].scene.set_refedit_keep(None);
@@ -586,8 +717,8 @@ impl OpenCADStudio {
                         .map(|e| e.common().handle)
                         .filter(|h| session.in_working_set(*h))
                         .collect();
+                    self.tabs[i].scene.refedit_lock = session.lock;
                     self.tabs[i].refedit_session = Some(session);
-                    self.tabs[i].scene.refedit_lock = true;
                     self.tabs[i].scene.set_refedit_keep(Some(keep));
                 }
             }
@@ -605,4 +736,193 @@ impl OpenCADStudio {
             _ => {}
         }
     }
+
+    /// The working set's objects of an external reference under host names:
+    /// `XREF|NAME` becomes `$N$NAME` (the first free N) with records of its
+    /// own when `unique`, else `NAME`, sharing a host record of that name when
+    /// one exists. Missing records are copied from the reference's.
+    fn refedit_host_names(
+        &mut self,
+        i: usize,
+        mut copies: Vec<EntityType>,
+        prefix: &str,
+        unique: bool,
+    ) -> (Vec<EntityType>, RefEditNames) {
+        let document = &mut self.tabs[i].scene.document;
+        let deps = crate::app::ClipboardDeps::capture(document, &copies);
+        let strip = |name: &str| -> Option<String> {
+            (name.len() > prefix.len()
+                && name.is_char_boundary(prefix.len())
+                && name[..prefix.len()].eq_ignore_ascii_case(prefix))
+            .then(|| name[prefix.len()..].to_string())
+        };
+        let exists = |document: &codec::CadDocument, kind: SymbolKind, name: &str| match kind {
+            SymbolKind::Layer => document.layers.contains(name),
+            SymbolKind::Linetype => document.line_types.contains(name),
+            SymbolKind::TextStyle => document.text_styles.contains(name),
+            SymbolKind::Block => document.block_records.get(name).is_some(),
+        };
+        let wanted: Vec<(SymbolKind, String)> = deps
+            .layers
+            .iter()
+            .map(|r| (SymbolKind::Layer, r.name.clone()))
+            .chain(deps.linetypes.iter().map(|r| (SymbolKind::Linetype, r.name.clone())))
+            .chain(deps.text_styles.iter().map(|r| (SymbolKind::TextStyle, r.name.clone())))
+            .chain(deps.blocks.iter().map(|b| (SymbolKind::Block, b.name.clone())))
+            .collect();
+        let mut names = RefEditNames::default();
+        for (kind, original) in wanted {
+            let Some(base) = strip(&original) else {
+                continue;
+            };
+            let taken = |names: &RefEditNames, candidate: &str| {
+                exists(document, kind, candidate)
+                    || names
+                        .renamed
+                        .iter()
+                        .any(|(k, used, _)| *k == kind && used.eq_ignore_ascii_case(candidate))
+            };
+            // Layer 0 is the host's own in every drawing.
+            let used = if kind == SymbolKind::Layer && base == "0" {
+                base
+            } else if unique {
+                (0u32..)
+                    .map(|n| format!("${n}${base}"))
+                    .find(|candidate| !taken(&names, candidate))
+                    .expect("a free name")
+            } else {
+                base
+            };
+            if !exists(document, kind, &used)
+                && !names
+                    .created
+                    .iter()
+                    .any(|(k, n)| *k == kind && n.eq_ignore_ascii_case(&used))
+            {
+                names.created.push((kind, used.clone()));
+            }
+            names.renamed.push((kind, used, original));
+        }
+        let used_for = |kind: SymbolKind, name: &str| {
+            names
+                .renamed
+                .iter()
+                .find(|(k, _, original)| *k == kind && original.eq_ignore_ascii_case(name))
+                .map(|(_, used, _)| used.clone())
+        };
+        let created = |kind: SymbolKind, name: &str| -> Option<String> {
+            used_for(kind, name).filter(|used| {
+                names
+                    .created
+                    .iter()
+                    .any(|(k, n)| *k == kind && n.eq_ignore_ascii_case(used))
+            })
+        };
+        for record in &deps.layers {
+            if let Some(used) = created(SymbolKind::Layer, &record.name) {
+                let mut copy = record.clone();
+                copy.name = used;
+                copy.flags.xref_dependent = false;
+                copy.xref_block_record_handle = Handle::NULL;
+                if let Some(linetype) = used_for(SymbolKind::Linetype, &copy.line_type) {
+                    copy.line_type = linetype;
+                }
+                copy.handle = document.allocate_handle();
+                let _ = document.layers.add(copy);
+            }
+        }
+        for record in &deps.linetypes {
+            if let Some(used) = created(SymbolKind::Linetype, &record.name) {
+                let mut copy = record.clone();
+                copy.name = used;
+                copy.xref_dependent = false;
+                copy.xref_block_record_handle = Handle::NULL;
+                copy.handle = document.allocate_handle();
+                let _ = document.line_types.add(copy);
+            }
+        }
+        for record in &deps.text_styles {
+            if let Some(used) = created(SymbolKind::TextStyle, &record.name) {
+                let mut copy = record.clone();
+                copy.name = used;
+                copy.xref_dependent = false;
+                copy.xref_block_record_handle = Handle::NULL;
+                copy.handle = document.allocate_handle();
+                let _ = document.text_styles.add(copy);
+            }
+        }
+        let rename = |kind: SymbolKind, name: &str| used_for(kind, name);
+        let blocks: Vec<crate::app::BlockDef> = deps
+            .blocks
+            .iter()
+            .filter_map(|def| {
+                let used = created(SymbolKind::Block, &def.name)?;
+                let mut entities = def.entities.clone();
+                for entity in &mut entities {
+                    rename_symbols(entity, &rename);
+                }
+                Some(crate::app::BlockDef {
+                    name: used,
+                    base_point: def.base_point,
+                    entities,
+                })
+            })
+            .collect();
+        crate::app::command_driver::clipboard::merge_block_defs(document, &blocks);
+        for entity in &mut copies {
+            rename_symbols(entity, &rename);
+        }
+        (copies, names)
+    }
+
+    /// Removes the host records made for a session that nothing uses any more.
+    fn drop_refedit_names(&mut self, i: usize, names: &RefEditNames) {
+        for (kind, name) in names.created.iter().rev() {
+            let scene = &mut self.tabs[i].scene;
+            let in_use = scene.document.entities().any(|entity| {
+                let common = entity.common();
+                match kind {
+                    SymbolKind::Layer => common.layer.eq_ignore_ascii_case(name),
+                    SymbolKind::Linetype => common.linetype.eq_ignore_ascii_case(name),
+                    SymbolKind::TextStyle => match entity {
+                        EntityType::Text(t) => t.style.eq_ignore_ascii_case(name),
+                        EntityType::MText(t) => t.style.eq_ignore_ascii_case(name),
+                        EntityType::AttributeDefinition(a) => {
+                            a.text_style.eq_ignore_ascii_case(name)
+                        }
+                        _ => false,
+                    },
+                    SymbolKind::Block => matches!(
+                        entity,
+                        EntityType::Insert(insert) if insert.block_name.eq_ignore_ascii_case(name)
+                    ),
+                }
+            });
+            // A linetype made for the session may also be a kept layer's.
+            let in_use = in_use
+                || (*kind == SymbolKind::Linetype
+                    && scene
+                        .document
+                        .layers
+                        .iter()
+                        .any(|layer| layer.line_type.eq_ignore_ascii_case(name)));
+            if in_use {
+                continue;
+            }
+            match kind {
+                SymbolKind::Layer => {
+                    scene.document.layers.remove(name);
+                }
+                SymbolKind::Linetype => {
+                    scene.document.line_types.remove(name);
+                }
+                SymbolKind::TextStyle => {
+                    scene.document.text_styles.remove(name);
+                }
+                SymbolKind::Block => {
+                    let _ = crate::scene::block_service::erase(scene, name);
+                }
+            }
+        }
+    }
 }

src/app/control/actions.rs

@@ -105,6 +105,7 @@ pub(super) const NAMES: &[&str] = &[
     "pdf_dialog_ok",
     "view_background",
     "image_adjust",
+    "refedit_dialog",
     "pdf_layer_toggle",
     "pc_manager_toggle",
     "pc_manager",
@@ -1885,6 +1886,36 @@ impl OpenCADStudio {
                 })
             }
             "ribbon_dropdown" => Message::ToggleRibbonDropdown(string(req, "value")?.into()),
+            // The Edit Reference dialog, one field per call: "level=<n>" (0 =
+            // the picked reference), "nested=0|1" (pick the working set in the
+            // drawing), "attributes=0|1", "lock=0|1", "unique=0|1", "ok" or
+            // "cancel".
+            "refedit_dialog" => {
+                use crate::ui::window::refedit_dialog::RefEditDialogMsg as R;
+                if self.active_modal != Some(crate::app::ModalKind::RefEdit) {
+                    return Err(failure("no_dialog", "The Reference Edit dialog is not open"));
+                }
+                let spec = string(req, "value")?;
+                let (key, value) = spec.split_once('=').unwrap_or((spec, ""));
+                let flag = || match value {
+                    "1" => Ok(true),
+                    "0" => Ok(false),
+                    _ => Err(failure("invalid_value", spec)),
+                };
+                if key == "cancel" {
+                    Message::CloseModal
+                } else {
+                Message::RefEditDialog(match key {
+                    "ok" => R::Ok,
+                    "level" => R::Level(value.parse().map_err(|_| failure("invalid_value", spec))?),
+                    "nested" => R::Nested(flag()?),
+                    "attributes" => R::Attributes(flag()?),
+                    "lock" => R::Lock(flag()?),
+                    "unique" => R::Unique(flag()?),
+                    _ => return Err(failure("invalid_value", "Unknown Reference Edit field")),
+                })
+                }
+            }
             // The -VIEW Background dialog, one field per call: "type=gradient",
             // "color|top|middle|bottom=r,g,b", "three=1", "rotation=30",
             // "image=<path>", "position=center|stretch|tile", "aspect=1", "offset=x,y" (pixels), "scale=x,y",

src/app/mod.rs

@@ -586,6 +586,8 @@ pub(super) struct OpenCADStudio {
     view_background: Option<crate::ui::window::pdf_dialogs::ViewBackgroundState>,
     /// IMAGEADJUST dialog.
     image_adjust: Option<crate::ui::window::pdf_dialogs::ImageAdjustState>,
+    /// The Edit Reference dialog (REFEDIT).
+    refedit_dialog: Option<crate::ui::window::refedit_dialog::RefEditDialogState>,
     underlay_layers: Option<crate::ui::window::pdf_dialogs::UnderlayLayersState>,
     pdf_import_settings: Option<crate::modules::insert::pdf_import::PdfImportSettings>,
     pdf_import_file: Option<crate::ui::window::pdf_dialogs::PdfImportFileState>,
@@ -794,6 +796,8 @@ pub(super) struct OpenCADStudio {
     block_freq: std::collections::HashMap<String, u32>,
     /// BLOCKMRULIST: how many recent blocks the palette keeps (0–100).
     pub(crate) block_mru_list: u8,
+    /// The Edit Reference dialog's remembered settings.
+    pub(crate) refedit_options: crate::app::settings::RefEditOptions,
     /// BLOCKREDEFINEMODE (0–2).
     pub(crate) block_redefine_mode: u8,
     /// BLOCKNAVIGATE: the Libraries tab's start folder ("." for none).
@@ -2158,6 +2162,7 @@ pub enum ModalKind {
     PcSection,
     ViewBackground,
     ImageAdjust,
+    RefEdit,
     UnderlayLayers,
     PdfImportSettings,
     PdfImportFile,
@@ -4356,6 +4361,8 @@ pub enum Message {
     PdfDialog(crate::ui::window::pdf_dialogs::PdfDialogMsg),
     AttdefDialog(crate::ui::window::attdef_dialog::AttdefDialogMsg),
     FieldDialog(crate::ui::window::field_dialog::FieldDialogMsg),
+    /// An edit in the Edit Reference dialog.
+    RefEditDialog(crate::ui::window::refedit_dialog::RefEditDialogMsg),
     /// A click or search in the Point Cloud Manager.
     PcManager(crate::ui::window::pc_manager::PcManagerMsg),
     Count(crate::ui::window::count_palette::CountMsg),
@@ -4569,6 +4576,7 @@ impl OpenCADStudio {
             pc_section: None,
             view_background: None,
             image_adjust: None,
+            refedit_dialog: None,
             underlay_layers: None,
             pdf_import_settings: None,
             pdf_import_file: None,
@@ -4668,6 +4676,7 @@ impl OpenCADStudio {
             block_mru: Vec::new(),
             block_freq: std::collections::HashMap::new(),
             block_mru_list: 50,
+            refedit_options: Default::default(),
             block_redefine_mode: 1,
             block_navigate: ".".to_string(),
             insname: String::new(),

src/app/settings.rs

@@ -652,6 +652,9 @@ pub struct UserSettings {
     /// BLOCKNAVIGATE (default ".").
     #[serde(default = "default_block_navigate")]
     pub block_navigate: String,
+    /// The Edit Reference dialog's settings.
+    #[serde(default)]
+    pub refedit: RefEditOptions,
     /// XFADECTL: how far objects outside the REFEDIT working set fade (0–90, default 70).
     #[serde(default = "default_xfadectl")]
     pub xfadectl: u8,
@@ -687,6 +690,30 @@ pub struct PaletteBlockRef {
     pub drawing: bool,
 }
 
+/// The Edit Reference dialog's settings, remembered between sessions: give
+/// an external reference's clashing named objects unique names, check out
+/// attribute definitions, lock what is outside the working set, pick the
+/// working set's objects in the drawing.
+#[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
+#[serde(default)]
+pub struct RefEditOptions {
+    pub unique_names: bool,
+    pub attributes: bool,
+    pub lock: bool,
+    pub nested: bool,
+}
+
+impl Default for RefEditOptions {
+    fn default() -> Self {
+        Self {
+            unique_names: true,
+            attributes: false,
+            lock: true,
+            nested: false,
+        }
+    }
+}
+
 /// The Blocks palette's insertion options.
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct BlockInsertOptions {
@@ -938,6 +965,7 @@ impl Default for UserSettings {
             block_mru_list: 50,
             block_redefine_mode: 1,
             block_navigate: ".".to_string(),
+            refedit: RefEditOptions::default(),
             xfadectl: 70,
             count_color: 3,
             count_error_color: 1,

src/app/update/file.rs

@@ -873,6 +873,7 @@ impl OpenCADStudio {
             block_mru_list: self.block_mru_list,
             block_redefine_mode: self.block_redefine_mode,
             block_navigate: self.block_navigate.clone(),
+            refedit: self.refedit_options.clone(),
             xfadectl: crate::scene::cache::block_cache::refedit_fade_ctl() as u8,
             count_color: self.count_palette.color,
             count_error_color: self.count_palette.error_color,
@@ -1036,6 +1037,7 @@ impl OpenCADStudio {
         self.block_redefine_mode = s.block_redefine_mode.min(2);
         self.block_navigate = s.block_navigate.clone();
         crate::scene::cache::block_cache::set_refedit_fade_ctl(i32::from(s.xfadectl.min(90)));
+        self.refedit_options = s.refedit.clone();
         self.count_palette.color = s.count_color;
         self.count_palette.error_color = s.count_error_color;
         self.count_palette.service = s.count_service;

src/app/update/mod.rs

@@ -2281,6 +2281,7 @@ impl OpenCADStudio {
             Message::PdfDialog(message) => self.update_pdf_dialog(message),
             Message::AttdefDialog(message) => self.on_attdef_dialog(message),
             Message::FieldDialog(message) => self.on_field_dialog(message),
+            Message::RefEditDialog(message) => self.update_refedit_dialog(message),
             Message::PcManager(message) => self.update_pc_manager(message),
             Message::Count(message) => self.on_count(message),
             Message::SheetSet(message) => self.on_sheet_set(message),
@@ -9503,6 +9504,9 @@ impl OpenCADStudio {
                         Task::none()
                     };
                 }
+                if self.active_modal == Some(super::ModalKind::RefEdit) {
+                    self.refedit_dialog = None;
+                }
                 // Cancelling the section settings drops the waiting extraction.
                 if self.active_modal == Some(super::ModalKind::PcSection) {
                     crate::modules::insert::pc_extract::drop_job();

src/app/view/modal.rs

@@ -41,6 +41,7 @@ impl OpenCADStudio {
                 self.view_background.as_ref().map_or("", |s| s.view.as_str())
             ),
             Some(K::ImageAdjust) => crate::tr!("image-adjust", "title"),
+            Some(K::RefEdit) => crate::tr!("ref-edit", "dialog-title"),
             Some(K::UnderlayLayers) => crate::t!("Underlay Layers").into_owned(),
             Some(K::PdfImportSettings) => crate::t!("PDF Import Settings").into_owned(),
             Some(K::PdfImportFile) => crate::t!("Import PDF").into_owned(),
@@ -542,6 +543,12 @@ impl OpenCADStudio {
                     crate::ui::window::pdf_dialogs::image_adjust(state, flow)
                 })
             }
+            super::super::ModalKind::RefEdit => {
+                let state = self.refedit_dialog.as_ref()?;
+                sized_flow(ex, 560, 470, |flow| {
+                    crate::ui::window::refedit_dialog::view(state, flow)
+                })
+            }
             super::super::ModalKind::UnderlayLayers => {
                 let state = self.underlay_layers.as_ref()?;
                 sized_flow(ex, 460, 520, |flow| {

src/mcp.rs

@@ -32,7 +32,7 @@ const MODERN_PROTOCOL_VERSION: &str = "2026-07-28";
 ///
 /// `block_delete` gained its optional `force` parameter.
 #[cfg(test)]
-const TOOL_SCHEMA_DIGEST: &str = "dde915fd17f3cc4667e1eee8d796030156e7ff9423b0fa9b48a648a1481df723";
+const TOOL_SCHEMA_DIGEST: &str = "c5f9ad00e04c0acc809c7de0c75e789fd9bf3ad6db68bdde36bd771a859fef79";
 const MAX_REQUEST: usize = 1_048_576;
 const MAX_RESPONSE: u64 = 16 * 1024 * 1024;
 const CACHE_TTL_MS: u64 = 3_600_000;

src/modules/draw/modify/refedit.rs

@@ -94,6 +94,79 @@ pub struct RefEditSession {
     pub handle_watermark: u64,
     /// The referenced file when the definition is an xref.
     pub xref_path: Option<String>,
+    /// Objects outside the working set can't be selected while it is open.
+    pub lock: bool,
+    /// The external reference's named objects the working set uses under
+    /// host names, and the host records made for the session.
+    pub names: RefEditNames,
+}
+
+/// A kind of named object the working set's objects refer to.
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum SymbolKind {
+    Layer,
+    Linetype,
+    TextStyle,
+    Block,
+}
+
+/// How an external reference's dependent names (`XREF|NAME`) are used in
+/// the host while its objects are checked out: as `$0$NAME` records of
+/// their own (unique names), or under the plain name, sharing a host record
+/// of that name when there is one.
+#[derive(Debug, Clone, Default)]
+pub struct RefEditNames {
+    /// (kind, name used in the host, the reference's dependent name).
+    pub renamed: Vec<(SymbolKind, String, String)>,
+    /// Records added to the host for the session, removed when it closes.
+    pub created: Vec<(SymbolKind, String)>,
+}
+
+impl RefEditNames {
+    /// The reference's own name for a host name used in the session.
+    pub fn original(&self, kind: SymbolKind, name: &str) -> Option<&str> {
+        self.renamed
+            .iter()
+            .find(|(k, used, _)| *k == kind && used.eq_ignore_ascii_case(name))
+            .map(|(_, _, original)| original.as_str())
+    }
+}
+
+/// Rewrites every named-object reference of an entity through `map`
+/// (layer, linetype, text style, block).
+pub fn rename_symbols(entity: &mut EntityType, map: &dyn Fn(SymbolKind, &str) -> Option<String>) {
+    let common = entity.common_mut();
+    if let Some(name) = map(SymbolKind::Layer, &common.layer) {
+        common.layer = name;
+        common.layer_handle = None;
+    }
+    if let Some(name) = map(SymbolKind::Linetype, &common.linetype) {
+        common.linetype = name;
+        common.linetype_handle = None;
+    }
+    match entity {
+        EntityType::Insert(insert) => {
+            if let Some(name) = map(SymbolKind::Block, &insert.block_name) {
+                insert.block_name = name;
+            }
+        }
+        EntityType::Text(text) => {
+            if let Some(name) = map(SymbolKind::TextStyle, &text.style) {
+                text.style = name;
+            }
+        }
+        EntityType::MText(text) => {
+            if let Some(name) = map(SymbolKind::TextStyle, &text.style) {
+                text.style = name;
+            }
+        }
+        EntityType::AttributeDefinition(attdef) => {
+            if let Some(name) = map(SymbolKind::TextStyle, &attdef.text_style) {
+                attdef.text_style = name;
+            }
+        }
+        _ => {}
+    }
 }
 
 impl RefEditSession {
@@ -334,10 +407,23 @@ pub struct RefEditOptionsCommand {
     level: usize,
     step: OptionStep,
     nested: Vec<Handle>,
+    /// The session settings (lock objects outside the working set, unique
+    /// names for an external reference's named objects).
+    lock: bool,
+    unique: bool,
+    /// Set when the Edit Reference dialog already chose the attribute
+    /// option: the nested pick then opens the session directly.
+    attributes: Option<bool>,
 }
 
 impl RefEditOptionsCommand {
-    pub fn new(top: Handle, chain: Vec<ChainLevel>, hits: Vec<LevelHits>) -> Self {
+    pub fn new(
+        top: Handle,
+        chain: Vec<ChainLevel>,
+        hits: Vec<LevelHits>,
+        lock: bool,
+        unique: bool,
+    ) -> Self {
         let level = chain.len().saturating_sub(1);
         Self {
             top,
@@ -346,9 +432,30 @@ impl RefEditOptionsCommand {
             level,
             step: OptionStep::Nesting,
             nested: Vec::new(),
+            lock,
+            unique,
+            attributes: None,
         }
     }
 
+    /// `Select nested objects:` for the dialog's "pick in the drawing"
+    /// working set at `level`.
+    pub fn nested_pick(
+        top: Handle,
+        chain: Vec<ChainLevel>,
+        hits: Vec<LevelHits>,
+        level: usize,
+        attributes: bool,
+        lock: bool,
+        unique: bool,
+    ) -> Self {
+        let mut command = Self::new(top, chain, hits, lock, unique);
+        command.level = level.min(command.chain.len().saturating_sub(1));
+        command.step = OptionStep::Nested;
+        command.attributes = Some(attributes);
+        command
+    }
+
     fn begin(&self, attributes: bool) -> CmdResult {
         let path: Vec<String> = self.chain[1..=self.level]
             .iter()
@@ -357,11 +464,13 @@ impl RefEditOptionsCommand {
         let nested: Vec<String> = self.nested.iter().map(|h| h.value().to_string()).collect();
         CmdResult::Relaunch(
             format!(
-                "REFEDIT_BEGIN:{}:{}:{}:{}",
+                "REFEDIT_BEGIN:{}:{}:{}:{}:{}:{}",
                 self.top.value(),
                 path.join(","),
                 attributes as u8,
-                nested.join(",")
+                nested.join(","),
+                self.lock as u8,
+                self.unique as u8
             ),
             vec![],
         )
@@ -469,6 +578,9 @@ impl CadCommand for RefEditOptionsCommand {
                 if n == 0 {
                     return CmdResult::CancelWithMessage(t!("0 items selected").into_owned());
                 }
+                if let Some(attributes) = self.attributes {
+                    return self.begin(attributes);
+                }
                 self.step = OptionStep::Attributes;
                 CmdResult::ReportMeasurement(if n == 1 {
                     t!("1 item selected").into_owned()

src/ui/window/mod.rs

@@ -30,6 +30,7 @@ pub mod plot;
 pub mod plugin_manager;
 pub mod print_all;
 pub mod recovery;
+pub mod refedit_dialog;
 pub mod sheet_set;
 pub mod shortcuts;
 pub mod update_notice;

src/ui/window/pdf_dialogs.rs

@@ -312,7 +312,7 @@ pub(crate) fn well_style(theme: &Theme) -> container::Style {
 }
 
 /// A titled card.
-fn card<'a>(title: String, content: impl Into<Element<'a, Message>>) -> Element<'a, Message> {
+pub(crate) fn card<'a>(title: String, content: impl Into<Element<'a, Message>>) -> Element<'a, Message> {
     container(
         column![
             text(title.to_uppercase()).size(10).style(accent_text),

src/ui/window/refedit_dialog.rs

@@ -0,0 +1,247 @@
+//! Edit Reference dialog (REFEDIT): the nesting level to check out, shown as
+//! a chain of chips beside a preview of the chosen definition, how the
+//! working set is filled, whether attribute definitions come along, and the
+//! session settings (lock what is outside the working set, give clashing
+//! named objects of an external reference unique names).
+
+use iced::widget::{button, column, container, row, text, toggler, Space};
+use iced::{Border, Element, Fill, Length, Theme};
+
+use crate::app::Message;
+use crate::scene::model::wire_model::WireModel;
+use crate::ui::style::common::muted_style;
+use crate::ui::style::form::{button_style, dialog_button};
+use crate::ui::window::pdf_dialogs::{card, well_style};
+
+/// One edit in the Edit Reference dialog.
+#[derive(Debug, Clone)]
+pub enum RefEditDialogMsg {
+    /// The nesting level picked in the chain (0 = the selected reference).
+    Level(usize),
+    /// Pick the working set's objects in the drawing (else all of them).
+    Nested(bool),
+    Attributes(bool),
+    Lock(bool),
+    Unique(bool),
+    Help,
+    Ok,
+}
+
+fn msg(m: RefEditDialogMsg) -> Message {
+    Message::RefEditDialog(m)
+}
+
+/// One level of the nesting chain as the dialog shows it.
+pub struct RefEditLevel {
+    /// The reference's handle: the picked object for level 0, the
+    /// definition-owned reference below it.
+    pub insert: codec::Handle,
+    pub name: String,
+    /// The definition's preview.
+    pub wires: Vec<WireModel>,
+    /// The definition holds attribute definitions (the attribute switch is
+    /// only offered then).
+    pub has_attdefs: bool,
+    /// The referenced file of an external reference.
+    pub xref_path: Option<String>,
+}
+
+pub struct RefEditDialogState {
+    pub top: codec::Handle,
+    /// The picked chain, outermost first.
+    pub chain: Vec<crate::modules::draw::modify::refedit::ChainLevel>,
+    pub levels: Vec<RefEditLevel>,
+    pub level: usize,
+    pub nested: bool,
+    pub attributes: bool,
+    pub lock: bool,
+    pub unique: bool,
+}
+
+impl RefEditDialogState {
+    /// The attribute switch counts only where the chosen definition has
+    /// attribute definitions.
+    pub fn attributes_enabled(&self) -> bool {
+        self.levels.get(self.level).is_some_and(|l| l.has_attdefs)
+    }
+}
+
+fn label<'a>(value: String, enabled: bool) -> Element<'a, Message> {
+    text(value)
+        .size(12)
+        .style(move |theme: &Theme| {
+            if enabled {
+                text::Style::default()
+            } else {
+                text::Style {
+                    color: Some(theme.palette().background.strong.color),
+                }
+            }
+        })
+        .width(Fill)
+        .into()
+}
+
+/// A labelled switch on one row; inactive while `on_toggle` is None.
+fn switch_row<'a>(
+    name: String,
+    value: bool,
+    on_toggle: Option<fn(bool) -> RefEditDialogMsg>,
+) -> Element<'a, Message> {
+    let enabled = on_toggle.is_some();
+    let mut switch = toggler(value).size(18.0);
+    if let Some(on) = on_toggle {
+        switch = switch.on_toggle(move |v| msg(on(v)));
+    }
+    row![label(name, enabled), switch]
+        .spacing(8)
+        .align_y(iced::Center)
+        .into()
+}
+
+/// A level of the chain as a pill; the chosen one framed in the accent colour.
+fn level_chip<'a>(name: &str, index: usize, chosen: bool) -> Element<'a, Message> {
+    button(text(name.to_string()).size(12))
+        .on_press(msg(RefEditDialogMsg::Level(index)))
+        .padding([5, 12])
+        .style(move |theme: &Theme, status| {
+            let mut style = button_style(false)(theme, status);
+            style.border = Border {
+                width: if chosen { 1.5 } else { 1.0 },
+                radius: 14.0.into(),
+                color: if chosen {
+                    theme.palette().primary.base.color
+                } else {
+                    theme.palette().background.strong.color
+                },
+            };
+            if chosen {
+                style.text_color = theme.palette().primary.base.color;
+            }
+            style
+        })
+        .into()
+}
+
+pub fn view<'a>(
+    state: &'a RefEditDialogState,
+    sizing: crate::ui::modal::ModalSizing,
+) -> Element<'a, Message> {
+    let current = state.levels.get(state.level);
+    let preview: Element<'a, Message> = container(match current {
+        Some(level) => crate::ui::window::block_palette::preview_canvas(&level.wires, 104.0),
+        None => Space::new().into(),
+    })
+    .width(Length::Fixed(150.0))
+    .height(Length::Fixed(104.0))
+    .padding(4)
+    .style(well_style)
+    .into();
+    let mut chips = row![].spacing(6).align_y(iced::Center);
+    for (index, level) in state.levels.iter().enumerate() {
+        if index > 0 {
+            chips = chips.push(text("›").size(13).style(muted_style));
+        }
+        chips = chips.push(level_chip(&level.name, index, index == state.level));
+    }
+    let mut about = column![text(crate::tr!("ref-edit", "dialog-chain-hint"))
+        .size(11)
+        .style(muted_style)]
+    .spacing(4);
+    if let Some(path) = current.and_then(|l| l.xref_path.as_deref()) {
+        // A long path keeps its end, where the file name is.
+        const MAX: usize = 64;
+        let count = path.chars().count();
+        let shown = if count > MAX {
+            format!("…{}", path.chars().skip(count - (MAX - 1)).collect::<String>())
+        } else {
+            path.to_string()
+        };
+        about = about.push(
+            text(format!("{} {}", crate::tr!("ref-edit", "dialog-path"), shown))
+                .size(11)
+                .style(muted_style),
+        );
+    }
+    let reference = card(
+        crate::tr!("ref-edit", "dialog-reference"),
+        row![
+            preview,
+            column![iced::widget::scrollable(chips).direction(
+                iced::widget::scrollable::Direction::Horizontal(
+                    iced::widget::scrollable::Scrollbar::new().width(4).scroller_width(4)
+                )
+            ), about]
+            .spacing(8)
+            .width(Fill)
+        ]
+        .spacing(12),
+    );
+
+    let segment = |nested: bool, name: String| {
+        button(text(name).size(12).width(Fill).align_x(iced::Center))
+            .on_press(msg(RefEditDialogMsg::Nested(nested)))
+            .style(button_style(state.nested == nested))
+            .padding([6, 8])
+            .width(Fill)
+    };
+    let method = container(
+        row![
+            segment(false, crate::tr!("ref-edit", "dialog-all-objects")),
+            segment(true, crate::tr!("ref-edit", "dialog-pick-objects")),
+        ]
+        .spacing(2),
+    )
+    .padding(2)
+    .width(Fill)
+    .style(well_style);
+    let attributes_enabled = state.attributes_enabled();
+    let working_set = card(
+        crate::tr!("ref-edit", "dialog-working-set"),
+        column![
+            method,
+            switch_row(
+                crate::tr!("ref-edit", "dialog-attributes"),
+                state.attributes && attributes_enabled,
+                attributes_enabled.then_some(RefEditDialogMsg::Attributes as fn(bool) -> _),
+            ),
+        ]
+        .spacing(10),
+    );
+    let session = card(
+        crate::tr!("ref-edit", "dialog-session"),
+        column![
+            switch_row(
+                crate::tr!("ref-edit", "dialog-lock"),
+                state.lock,
+                Some(RefEditDialogMsg::Lock),
+            ),
+            switch_row(
+                crate::tr!("ref-edit", "dialog-unique"),
+                state.unique,
+                Some(RefEditDialogMsg::Unique),
+            ),
+        ]
+        .spacing(10),
+    );
+    let footer = row![
+        button(text("?").size(12))
+            .on_press(msg(RefEditDialogMsg::Help))
+            .style(button_style(false))
+            .padding([5, 11]),
+        Space::new().width(Fill),
+        dialog_button(crate::t!("Cancel"), Message::CloseModal, false),
+        dialog_button(
+            std::borrow::Cow::Owned(crate::tr!("ref-edit", "dialog-start")),
+            msg(RefEditDialogMsg::Ok),
+            true
+        ),
+    ]
+    .spacing(6)
+    .align_y(iced::Center);
+    column![reference, working_set, session, footer]
+        .spacing(10)
+        .padding([10, 12])
+        .width(sizing.width)
+        .into()
+}