perf(vue): patch layer tree node updates

packages/vue/src/primitives/LayerTree/LayerTreeRoot.vue

@@ -7,6 +7,7 @@ import { provideLayerTree } from '#vue/primitives/LayerTree/context'
 import { useLayerDrag } from '#vue/primitives/LayerTree/useLayerDrag'
 
 import type { LayerNode } from '#vue/primitives/LayerTree/context'
+import type { SceneNode } from '@open-pencil/scene-graph'
 
 const { indentPerLevel = 16 } = defineProps<{
   indentPerLevel?: number
@@ -32,6 +33,17 @@ const { draggingId, instruction, instructionTargetId, setupItem } = useLayerDrag
   expandNode
 )
 
+function nodeToLayerNode(node: SceneNode): LayerNode {
+  return {
+    id: node.id,
+    name: node.name,
+    type: node.type,
+    layoutMode: node.layoutMode,
+    visible: node.visible,
+    locked: node.locked
+  }
+}
+
 function buildTree(parentId: string): LayerNode[] {
   const parent = editor.graph.getNode(parentId)
   if (!parent) return []
@@ -39,12 +51,7 @@ function buildTree(parentId: string): LayerNode[] {
     .map((cid) => editor.graph.getNode(cid))
     .filter((n): n is NonNullable<typeof n> => !!n)
     .map((node) => ({
-      id: node.id,
-      name: node.name,
-      type: node.type,
-      layoutMode: node.layoutMode,
-      visible: node.visible,
-      locked: node.locked,
+      ...nodeToLayerNode(node),
       children: node.childIds.length > 0 ? buildTree(node.id) : undefined
     }))
 }
@@ -59,6 +66,46 @@ function rebuildTree() {
   treeVersion.value++
 }
 
+function replaceLayerNode(nodes: LayerNode[], replacement: LayerNode): LayerNode[] | null {
+  let changed = false
+  const next = nodes.map((node) => {
+    if (node.id === replacement.id) {
+      changed = true
+      return { ...replacement, children: node.children }
+    }
+    if (!node.children) return node
+    const children = replaceLayerNode(node.children, replacement)
+    if (!children) return node
+    changed = true
+    return { ...node, children }
+  })
+  return changed ? next : null
+}
+
+function patchLayerNode(id: string, changes: Partial<SceneNode>) {
+  if ('childIds' in changes || 'parentId' in changes) {
+    rebuildTree()
+    return
+  }
+
+  if (
+    !(
+      'name' in changes ||
+      'type' in changes ||
+      'layoutMode' in changes ||
+      'visible' in changes ||
+      'locked' in changes
+    )
+  ) {
+    return
+  }
+
+  const node = editor.graph.getNode(id)
+  if (!node) return
+  const next = replaceLayerNode(items.value, nodeToLayerNode(node))
+  if (next) items.value = next
+}
+
 const unsubscribe = [
   editor.onEditorEvent('graph:replaced', rebuildTree),
   editor.onEditorEvent('page:changed', rebuildTree),
@@ -66,7 +113,7 @@ const unsubscribe = [
   editor.onEditorEvent('node:deleted', rebuildTree),
   editor.onEditorEvent('node:reparented', rebuildTree),
   editor.onEditorEvent('node:reordered', rebuildTree),
-  editor.onEditorEvent('node:updated', rebuildTree)
+  editor.onEditorEvent('node:updated', patchLayerNode)
 ]
 
 onScopeDispose(() => {