add dom element resize observer registry for vue node components

src/renderer/extensions/vueNodes/components/LGraphNode.vue

@@ -121,6 +121,7 @@ import { useNodeLayout } from '@/renderer/extensions/vueNodes/layout/useNodeLayo
 import { LODLevel, useLOD } from '@/renderer/extensions/vueNodes/lod/useLOD'
 import { cn } from '@/utils/tailwindUtil'
 
+import { useVueElementTracking } from '../composables/useVueNodeResizeTracking'
 import NodeContent from './NodeContent.vue'
 import NodeHeader from './NodeHeader.vue'
 import NodeSlots from './NodeSlots.vue'
@@ -153,6 +154,8 @@ const emit = defineEmits<{
   'update:title': [nodeId: string, newTitle: string]
 }>()
 
+useVueElementTracking(props.nodeData.id, 'node')
+
 // Inject selection state from parent
 const selectedNodeIds = inject(SelectedNodeIdsKey)
 if (!selectedNodeIds) {

src/renderer/extensions/vueNodes/composables/useVueNodeResizeTracking.ts

@@ -0,0 +1,145 @@
+/**
+ * Generic Vue Element Tracking System
+ *
+ * Automatically tracks DOM size and position changes for Vue-rendered elements
+ * and syncs them to the layout store. Uses a single shared ResizeObserver for
+ * performance, with elements identified by configurable data attributes.
+ *
+ * Supports different element types (nodes, slots, widgets, etc.) with
+ * customizable data attributes and update handlers.
+ */
+import { getCurrentInstance, onMounted, onUnmounted } from 'vue'
+
+import { layoutStore } from '@/renderer/core/layout/store/layoutStore'
+import type { Bounds, NodeId } from '@/renderer/core/layout/types'
+
+/**
+ * Configuration for different types of tracked elements
+ */
+interface ElementTrackingConfig {
+  /** Data attribute name (e.g., 'nodeId') */
+  dataAttribute: string
+  /** Handler for processing bounds updates */
+  updateHandler: (updates: Array<{ id: string; bounds: Bounds }>) => void
+}
+
+/**
+ * Registry of tracking configurations by element type
+ */
+const trackingConfigs: Map<string, ElementTrackingConfig> = new Map([
+  [
+    'node',
+    {
+      dataAttribute: 'nodeId',
+      updateHandler: (updates) => {
+        const nodeUpdates = updates.map(({ id, bounds }) => ({
+          nodeId: id as NodeId,
+          bounds
+        }))
+        layoutStore.batchUpdateNodeBounds(nodeUpdates)
+      }
+    }
+  ]
+])
+
+// Single ResizeObserver instance for all Vue elements
+const resizeObserver = new ResizeObserver((entries) => {
+  // Group updates by element type
+  const updatesByType = new Map<string, Array<{ id: string; bounds: Bounds }>>()
+
+  for (const entry of entries) {
+    if (!(entry.target instanceof HTMLElement)) continue
+    const element = entry.target
+
+    // Find which type this element belongs to
+    let elementType: string | undefined
+    let elementId: string | undefined
+
+    for (const [type, config] of trackingConfigs) {
+      const id = element.dataset[config.dataAttribute]
+      if (id) {
+        elementType = type
+        elementId = id
+        break
+      }
+    }
+
+    if (!elementType || !elementId) continue
+
+    const { inlineSize: width, blockSize: height } = entry.contentBoxSize[0]
+    const rect = element.getBoundingClientRect()
+
+    const bounds: Bounds = {
+      x: rect.left,
+      y: rect.top,
+      width,
+      height
+    }
+
+    if (!updatesByType.has(elementType)) {
+      updatesByType.set(elementType, [])
+    }
+    const updates = updatesByType.get(elementType)
+    if (updates) {
+      updates.push({ id: elementId, bounds })
+    }
+  }
+
+  // Process updates by type
+  for (const [type, updates] of updatesByType) {
+    const config = trackingConfigs.get(type)
+    if (config && updates.length > 0) {
+      config.updateHandler(updates)
+    }
+  }
+})
+
+/**
+ * Tracks DOM element size/position changes for a Vue component and syncs to layout store
+ *
+ * Sets up automatic ResizeObserver tracking when the component mounts and cleans up
+ * when unmounted. The tracked element is identified by a data attribute set on the
+ * component's root DOM element.
+ *
+ * @param appIdentifier - Application-level identifier for this tracked element (not a DOM ID)
+ *                       Example: node ID like 'node-123', widget ID like 'widget-456'
+ * @param trackingType - Type of element being tracked, determines which tracking config to use
+ *                      Example: 'node' for Vue nodes, 'widget' for UI widgets
+ *
+ * @example
+ * ```ts
+ * // Track a Vue node component with ID 'my-node-123'
+ * useVueElementTracking('my-node-123', 'node')
+ *
+ * // Would set data-node-id="my-node-123" on the component's root element
+ * // and sync size changes to layoutStore.batchUpdateNodeBounds()
+ * ```
+ */
+export function useVueElementTracking(
+  appIdentifier: string,
+  trackingType: string
+) {
+  onMounted(() => {
+    const element = getCurrentInstance()?.proxy?.$el
+    if (!(element instanceof HTMLElement) || !appIdentifier) return
+
+    const config = trackingConfigs.get(trackingType)
+    if (config) {
+      // Set the appropriate data attribute
+      element.dataset[config.dataAttribute] = appIdentifier
+      resizeObserver.observe(element)
+    }
+  })
+
+  onUnmounted(() => {
+    const element = getCurrentInstance()?.proxy?.$el
+    if (!(element instanceof HTMLElement)) return
+
+    const config = trackingConfigs.get(trackingType)
+    if (config) {
+      // Remove the data attribute
+      delete element.dataset[config.dataAttribute]
+      resizeObserver.unobserve(element)
+    }
+  })
+}