add editor to placeholder props

packages/extension-placeholder/src/placeholder.ts

@@ -1,11 +1,15 @@
-import { Extension, isNodeEmpty } from '@tiptap/core'
+import { Editor, Extension, isNodeEmpty } from '@tiptap/core'
+import { Node as ProsemirrorNode } from 'prosemirror-model'
 import { Decoration, DecorationSet } from 'prosemirror-view'
 import { Plugin } from 'prosemirror-state'
 
 export interface PlaceholderOptions {
   emptyEditorClass: string,
   emptyNodeClass: string,
-  placeholder: string | Function,
+  placeholder: ((PlaceholderProps: {
+    editor: Editor,
+    node: ProsemirrorNode,
+  }) => string) | string,
   showOnlyWhenEditable: boolean,
   showOnlyCurrent: boolean,
 }
@@ -48,7 +52,10 @@ export const Placeholder = Extension.create<PlaceholderOptions>({
                 const decoration = Decoration.node(pos, pos + node.nodeSize, {
                   class: classes.join(' '),
                   'data-placeholder': typeof this.options.placeholder === 'function'
-                    ? this.options.placeholder(node)
+                    ? this.options.placeholder({
+                      editor: this.editor,
+                      node,
+                    })
                     : this.options.placeholder,
                 })