feat: add Edit Expression context menu and / key toggle for number widgets

Add getContextMenuOptions to NumberWidget for right-click "Edit Expression"
that opens the prompt in text mode, allowing math expressions like 2+3.
Add / key handler in prompt dialog to switch from number to text mode.
Wire up widget context menu items in LGraphCanvas processContextMenu.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/lib/litegraph/src/LGraphCanvas.ts

@@ -6973,6 +6973,12 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
       if (e.key == 'Escape') {
         // ESC
         dialog.close()
+      } else if (e.key === '/' && this.type === 'number') {
+        // Switch to text mode for expression editing
+        this.type = 'text'
+        this.removeAttribute('min')
+        this.removeAttribute('max')
+        this.removeAttribute('step')
       } else if (
         e.key == 'Enter' &&
         (e.target as Element).localName != 'textarea'
@@ -8511,6 +8517,26 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
       } else {
         // on node
         menu_info = this.getNodeMenuOptions(node)
+
+        const widget = node.getWidgetOnPos(event.canvasX, event.canvasY)
+        if (
+          widget &&
+          'getContextMenuOptions' in widget &&
+          typeof widget.getContextMenuOptions === 'function'
+        ) {
+          const widgetMenuItems = (
+            widget as {
+              getContextMenuOptions: (opts: {
+                e: CanvasPointerEvent
+                node: LGraphNode
+                canvas: LGraphCanvas
+              }) => IContextMenuValue[]
+            }
+          ).getContextMenuOptions({ e: event, node, canvas: this })
+          if (widgetMenuItems.length) {
+            menu_info.unshift(...widgetMenuItems, null)
+          }
+        }
       }
     } else {
       menu_info = this.getCanvasMenuOptions()

src/lib/litegraph/src/widgets/NumberWidget.test.ts

@@ -149,4 +149,32 @@ describe(NumberWidget, () => {
       { inputType: 'number', min: -1000, max: 1000, step: 1 }
     )
   })
+
+  it('getContextMenuOptions returns Edit Expression with text inputType', () => {
+    const canvas = createMockCanvas()
+    const e = createMockEvent(100)
+    const widget = createNumberWidget(node)
+
+    const options = widget.getContextMenuOptions({ e, node, canvas })
+
+    expect(options).toHaveLength(1)
+    expect(options[0].content).toBe('Edit Expression')
+  })
+
+  it('getContextMenuOptions callback opens prompt in text mode', () => {
+    const canvas = createMockCanvas()
+    const e = createMockEvent(100)
+    const widget = createNumberWidget(node)
+
+    const options = widget.getContextMenuOptions({ e, node, canvas })
+    void options[0].callback!.call({} as never)
+
+    expect(canvas.prompt).toHaveBeenCalledWith(
+      'Value',
+      50,
+      expect.any(Function),
+      e,
+      { inputType: 'text' }
+    )
+  })
 })

src/lib/litegraph/src/widgets/NumberWidget.ts

@@ -1,3 +1,5 @@
+import { t } from '@/i18n'
+import type { IContextMenuValue } from '@/lib/litegraph/src/interfaces'
 import type { INumericWidget } from '@/lib/litegraph/src/types/widgets'
 import { evaluateInput, getWidgetStep } from '@/lib/litegraph/src/utils/widget'
 
@@ -95,6 +97,31 @@ export class NumberWidget
     )
   }
 
+  getContextMenuOptions({
+    e,
+    node,
+    canvas
+  }: WidgetEventOptions): IContextMenuValue[] {
+    return [
+      {
+        content: t('widgets.editExpression'),
+        callback: () => {
+          canvas.prompt(
+            'Value',
+            this.value,
+            (v: string) => {
+              const parsed = evaluateInput(v)
+              if (parsed !== undefined)
+                this.setValue(parsed, { e, node, canvas })
+            },
+            e,
+            { inputType: 'text' }
+          )
+        }
+      }
+    ]
+  }
+
   override onDrag({ e, node, canvas }: WidgetEventOptions) {
     const width = this.width || node.width
     const x = e.canvasX - node.pos[0]

src/locales/en/main.json

@@ -2535,6 +2535,7 @@
       "true": "true",
       "false": "false"
     },
+    "editExpression": "Edit Expression",
     "node2only": "Node 2.0 only",
     "selectModel": "Select model",
     "uploadSelect": {