From e0382cdf86fd220f06c6daa2a241750b727ad78d Mon Sep 17 00:00:00 2001
From: syuilo <4439005+syuilo@users.noreply.github.com>
Date: Sat, 16 May 2026 07:12:11 +0900
Subject: [PATCH] duplicateSelectedObject

---
 packages/frontend/src/pages/rooms/room.core.vue | 6 ++++++
 packages/frontend/src/world/room/controller.ts  | 4 ++++
 packages/frontend/src/world/room/engine.ts      | 8 ++++++++
 3 files changed, 18 insertions(+)

diff --git a/packages/frontend/src/pages/rooms/room.core.vue b/packages/frontend/src/pages/rooms/room.core.vue
index 7ab20fefb9..c4f16bab0f 100644
--- a/packages/frontend/src/pages/rooms/room.core.vue
+++ b/packages/frontend/src/pages/rooms/room.core.vue
@@ -53,6 +53,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 				<MkButton v-if="controller.grabbing.value" iconOnly @click="controller.changeGrabbingDistance(10)"><i class="ti ti-arrows-maximize"></i></MkButton>
 				<MkButton v-if="controller.grabbing.value" iconOnly @click="controller.changeGrabbingDistance(-10)"><i class="ti ti-arrows-minimize"></i></MkButton>
 
+				<MkButton v-if="!controller.grabbing.value && controller.selected.value != null" @click="duplicateSelectedObject"><i class="ti ti-copy"></i></MkButton>
 				<MkButton v-if="!controller.grabbing.value && controller.selected.value != null" @click="removeSelectedObject"><i class="ti ti-trash"></i> (X)</MkButton>
 			</template>
 			<MkButton v-if="controller.isSitting.value" @click="controller.standUp()">降りる (Q)</MkButton>
@@ -417,6 +418,11 @@ function changeEnvType(type: RoomState['env']['type']) {
 	refresh();
 }
 
+function duplicateSelectedObject() {
+	controller.duplicateSelectedObject();
+	canvas.value!.focus();
+}
+
 function removeSelectedObject() {
 	controller.removeSelectedObject();
 	canvas.value!.focus();
diff --git a/packages/frontend/src/world/room/controller.ts b/packages/frontend/src/world/room/controller.ts
index 0357af6661..20cceec507 100644
--- a/packages/frontend/src/world/room/controller.ts
+++ b/packages/frontend/src/world/room/controller.ts
@@ -158,6 +158,10 @@ export class RoomController extends EngineControllerBase<RoomEngine> {
 		this.call('beginSelectedInstalledObjectGrabbing');
 	}
 
+	public duplicateSelectedObject() {
+		this.call('duplicateSelectedObject');
+	}
+
 	public removeSelectedObject() {
 		this.call('removeSelectedObject');
 	}
diff --git a/packages/frontend/src/world/room/engine.ts b/packages/frontend/src/world/room/engine.ts
index 6ea00c09aa..60fa6ff172 100644
--- a/packages/frontend/src/world/room/engine.ts
+++ b/packages/frontend/src/world/room/engine.ts
@@ -1673,6 +1673,14 @@ export class RoomEngine extends EventEmitter {
 			*/
 	}
 
+	public duplicateSelectedObject() {
+		if (this.selected == null) return;
+
+		const objectState = this.selected.objectState;
+
+		this.addObject(objectState.type, deepClone(objectState.options));
+	}
+
 	public removeSelectedObject() {
 		if (this.selected == null) return;