Implement DOMWidget for vue (#6006)

![vue-dom-widget](https://github.com/user-attachments/assets/d0c0e5f6-bacb-4fd9-957e-4f19e8071c3d)

Did testing on about a dozen custom nodes. Most just work.
- Some custom nodes have copy/pasted the `addDOMWidget` call with types
like `customtext` and get converted to textareas -> Not feasible to fix
here. Can open PRs into custom nodes if complaints arise.
- Only the KJNodes spline editor had mouse issues -> Can
investigate/open PR into KJNodes later.
- Many nodes don't resize gracefully. Probably best handled in a future
PR.
- Some expect to be handled like textareas. These currently have minsize
and don't scale.
- Others, like VHS previews, scale self properly, but don't update
height inside a drag operation -> node height can be set to less than
fit.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6006-Implement-DOMWidget-for-vue-2886d73d3650817ca497c15d87d70f4f)
by [Unito](https://www.unito.io)

src/composables/graph/useGraphNodeManager.ts

@@ -12,6 +12,7 @@ import type {
 import { useLayoutMutations } from '@/renderer/core/layout/operations/layoutMutations'
 import { LayoutSource } from '@/renderer/core/layout/types'
 import type { InputSpec } from '@/schemas/nodeDef/nodeDefSchemaV2'
+import { isDOMWidget } from '@/scripts/domWidget'
 import { useNodeDefStore } from '@/stores/nodeDefStore'
 import type { WidgetValue } from '@/types/simplifiedWidget'
 
@@ -38,6 +39,7 @@ export interface SafeWidgetData {
   callback?: ((value: unknown) => void) | undefined
   spec?: InputSpec
   slotMetadata?: WidgetSlotMetadata
+  isDOMWidget?: boolean
 }
 
 export interface VueNodeData {
@@ -156,7 +158,8 @@ export function useGraphNodeManager(graph: LGraph): GraphNodeManager {
           options: widget.options ? { ...widget.options } : undefined,
           callback: widget.callback,
           spec,
-          slotMetadata: slotInfo
+          slotMetadata: slotInfo,
+          isDOMWidget: isDOMWidget(widget)
         }
       } catch (error) {
         return {

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

@@ -62,6 +62,7 @@ import type {
 import { useErrorHandling } from '@/composables/useErrorHandling'
 import { useCanvasInteractions } from '@/renderer/core/canvas/useCanvasInteractions'
 import { useNodeTooltips } from '@/renderer/extensions/vueNodes/composables/useNodeTooltips'
+import WidgetDOM from '@/renderer/extensions/vueNodes/widgets/components/WidgetDOM.vue'
 import WidgetInputText from '@/renderer/extensions/vueNodes/widgets/components/WidgetInputText.vue'
 import {
   getComponent,
@@ -127,7 +128,8 @@ const processedWidgets = computed((): ProcessedWidget[] => {
     if (!shouldRenderAsVue(widget)) continue
 
     const vueComponent =
-      getComponent(widget.type, widget.name) || WidgetInputText
+      getComponent(widget.type, widget.name) ||
+      (widget.isDOMWidget ? WidgetDOM : WidgetInputText)
 
     const slotMetadata = widget.slotMetadata
 

src/renderer/extensions/vueNodes/widgets/components/WidgetDOM.vue

@@ -0,0 +1,29 @@
+<script setup lang="ts">
+import { onMounted, ref } from 'vue'
+
+import { useCanvasStore } from '@/renderer/core/canvas/canvasStore'
+import { isDOMWidget } from '@/scripts/domWidget'
+import type { SimplifiedWidget } from '@/types/simplifiedWidget'
+
+// Button widgets don't have a v-model value, they trigger actions
+const props = defineProps<{
+  widget: SimplifiedWidget<void>
+  nodeId: string
+  readonly?: boolean
+}>()
+
+const domEl = ref<HTMLElement>()
+
+const { canvas } = useCanvasStore()
+onMounted(() => {
+  if (!domEl.value) return
+  const node = canvas?.graph?.getNodeById(props.nodeId) ?? undefined
+  if (!node) return
+  const widget = node.widgets?.find((w) => w.name === props.widget.name)
+  if (!widget || !isDOMWidget(widget)) return
+  domEl.value.replaceChildren(widget.element)
+})
+</script>
+<template>
+  <div ref="domEl" />
+</template>

src/renderer/extensions/vueNodes/widgets/registry/widgetRegistry.ts

@@ -3,6 +3,8 @@
  */
 import type { Component } from 'vue'
 
+import type { SafeWidgetData } from '@/composables/graph/useGraphNodeManager'
+
 import WidgetAudioUI from '../components/WidgetAudioUI.vue'
 import WidgetButton from '../components/WidgetButton.vue'
 import WidgetChart from '../components/WidgetChart.vue'
@@ -169,11 +171,9 @@ export const isEssential = (type: string): boolean => {
   return widgets.get(canonicalType)?.essential || false
 }
 
-export const shouldRenderAsVue = (widget: {
+export const shouldRenderAsVue = (widget: Partial<SafeWidgetData>): boolean => {
-  type?: string
-  options?: Record<string, unknown>
-}): boolean => {
   if (widget.options?.canvasOnly) return false
+  if (widget.isDOMWidget) return true
   if (!widget.type) return false
   return isSupported(widget.type)
 }