[upstream] Upstream PreviewAny from rgthree-comfy (#3640)

Author: jtydhr88

src/extensions/core/index.ts

@@ -10,6 +10,7 @@ import './load3d'
 import './maskeditor'
 import './nodeTemplates'
 import './noteNode'
+import './previewAny'
 import './rerouteNode'
 import './saveImageExtraOutput'
 import './saveMesh'

src/extensions/core/previewAny.ts

@@ -0,0 +1,50 @@
+/*
+Preview Any - original implement from
+https://github.com/rgthree/rgthree-comfy/blob/main/py/display_any.py
+upstream requested in https://github.com/Kosinkadink/rfcs/blob/main/rfcs/0000-corenodes.md#preview-nodes
+ */
+import { IWidget } from '@comfyorg/litegraph'
+
+import { DOMWidget } from '@/scripts/domWidget'
+import { ComfyWidgets } from '@/scripts/widgets'
+import { useExtensionService } from '@/services/extensionService'
+
+useExtensionService().registerExtension({
+  name: 'Comfy.PreviewAny',
+  async beforeRegisterNodeDef(nodeType, nodeData) {
+    if (nodeData.name === 'PreviewAny') {
+      const onNodeCreated = nodeType.prototype.onNodeCreated
+
+      nodeType.prototype.onNodeCreated = function () {
+        onNodeCreated ? onNodeCreated.apply(this, []) : undefined
+
+        const showValueWidget = ComfyWidgets['STRING'](
+          this,
+          'preview',
+          ['STRING', { multiline: true }],
+          app
+        ).widget as DOMWidget<any, any>
+
+        showValueWidget.element.readOnly = true
+
+        showValueWidget.serialize = false
+      }
+
+      const onExecuted = nodeType.prototype.onExecuted
+
+      nodeType.prototype.onExecuted = function (message) {
+        onExecuted === null || onExecuted === void 0
+          ? void 0
+          : onExecuted.apply(this, [message])
+
+        const previewWidget = this.widgets?.find(
+          (w: IWidget) => w.name === 'preview'
+        )
+
+        if (previewWidget) {
+          previewWidget.value = message.text[0]
+        }
+      }
+    }
+  }
+})