From 3277ac1f1682ba4011dc2abd9564b9cbe5723923 Mon Sep 17 00:00:00 2001
From: huchenlei <huchenlei@proton.me>
Date: Fri, 6 Dec 2024 17:46:24 -0500
Subject: [PATCH] Add LGraph.empty

---
 src/LGraph.ts       | 10 ++++++++++
 src/LGraphCanvas.ts | 13 +++++--------
 2 files changed, 15 insertions(+), 8 deletions(-)

diff --git a/src/LGraph.ts b/src/LGraph.ts
index 75e4028..65b522f 100644
--- a/src/LGraph.ts
+++ b/src/LGraph.ts
@@ -115,6 +115,16 @@ export class LGraph implements LinkNetwork, Serialisable<SerialisableGraph> {
   inputs: Dictionary<IGraphInput>
   outputs: Dictionary<IGraphInput>
 
+  /** @returns Whether the graph has no items */
+  get empty(): boolean {
+    return this.positionableItems.length === 0
+  }
+
+  /** @returns All items on the canvas that can be selected */
+  get positionableItems(): Positionable[] {
+    return [...this._nodes, ...this._groups, ...this.reroutes.values()]
+  }
+
   #reroutes = new Map<RerouteId, Reroute>()
   /** All reroutes in this graph. */
   public get reroutes(): Map<RerouteId, Reroute> {
diff --git a/src/LGraphCanvas.ts b/src/LGraphCanvas.ts
index eb0772a..77cc394 100644
--- a/src/LGraphCanvas.ts
+++ b/src/LGraphCanvas.ts
@@ -3954,15 +3954,12 @@ export class LGraphCanvas {
     }
   }
 
-  /**
-   * @returns All items on the canvas that can be selected
-   */
+  get empty(): boolean {
+    return this.graph.empty
+  }
+
   get positionableItems(): Positionable[] {
-    return [
-      ...this.graph._nodes,
-      ...this.graph._groups,
-      ...this.graph.reroutes.values(),
-    ]
+    return this.graph.positionableItems
   }
 
   /**