add basic floating menu

packages/extension-floating-menu/README.md

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+# @tiptap/extension-floating-menu
+[![Version](https://img.shields.io/npm/v/@tiptap/extension-floating-menu.svg?label=version)](https://www.npmjs.com/package/@tiptap/extension-floating-menu)
+[![Downloads](https://img.shields.io/npm/dm/@tiptap/extension-floating-menu.svg)](https://npmcharts.com/compare/tiptap?minimal=true)
+[![License](https://img.shields.io/npm/l/@tiptap/extension-floating-menu.svg)](https://www.npmjs.com/package/@tiptap/extension-floating-menu)
+[![Sponsor](https://img.shields.io/static/v1?label=Sponsor&message=%E2%9D%A4&logo=GitHub)](https://github.com/sponsors/ueberdosis)
+
+## Introduction
+tiptap is a headless wrapper around [ProseMirror](https://ProseMirror.net) – a toolkit for building rich text WYSIWYG editors, which is already in use at many well-known companies such as *New York Times*, *The Guardian* or *Atlassian*.
+
+## Offical Documentation
+Documentation can be found on the [tiptap website](https://tiptap.dev).
+
+## License
+tiptap is open-sourced software licensed under the [MIT license](https://github.com/ueberdosis/tiptap-next/blob/main/LICENSE.md).

packages/extension-floating-menu/package.json

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+{
+  "name": "@tiptap/extension-floating-menu",
+  "description": "floating-menu extension for tiptap",
+  "version": "2.0.0-beta.0",
+  "homepage": "https://tiptap.dev",
+  "keywords": [
+    "tiptap",
+    "tiptap extension"
+  ],
+  "license": "MIT",
+  "funding": {
+    "type": "github",
+    "url": "https://github.com/sponsors/ueberdosis"
+  },
+  "main": "dist/tiptap-extension-floating-menu.cjs.js",
+  "umd": "dist/tiptap-extension-floating-menu.umd.js",
+  "module": "dist/tiptap-extension-floating-menu.esm.js",
+  "unpkg": "dist/tiptap-extension-floating-menu.bundle.umd.min.js",
+  "types": "dist/packages/extension-floating-menu/src/index.d.ts",
+  "files": [
+    "src",
+    "dist"
+  ],
+  "peerDependencies": {
+    "@tiptap/core": "^2.0.0-beta.1"
+  },
+  "dependencies": {
+    "prosemirror-state": "^1.3.4",
+    "prosemirror-view": "^1.18.2"
+  }
+}

packages/extension-floating-menu/src/floating-menu-plugin.ts

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+import { Editor } from '@tiptap/core'
+import { EditorState, Plugin, PluginKey } from 'prosemirror-state'
+import { EditorView } from 'prosemirror-view'
+
+export interface FloatingMenuPluginProps {
+  editor: Editor,
+  element: HTMLElement,
+}
+
+export type FloatingMenuViewProps = FloatingMenuPluginProps & {
+  view: EditorView,
+}
+
+export class FloatingMenuView {
+  public editor: Editor
+
+  public element: HTMLElement
+
+  public view: EditorView
+
+  public isActive = false
+
+  public top = 0
+
+  public preventHide = false
+
+  constructor({
+    editor,
+    element,
+    view,
+  }: FloatingMenuViewProps) {
+    this.editor = editor
+    this.element = element
+    this.view = view
+    this.element.addEventListener('mousedown', this.mousedownHandler, { capture: true })
+    this.editor.on('focus', this.focusHandler)
+    this.editor.on('blur', this.blurHandler)
+    this.render()
+  }
+
+  mousedownHandler = () => {
+    this.preventHide = true
+  }
+
+  focusHandler = () => {
+    // we use `setTimeout` to make sure `selection` is already updated
+    setTimeout(() => this.update(this.editor.view))
+  }
+
+  blurHandler = ({ event }: { event: FocusEvent }) => {
+    if (this.preventHide) {
+      this.preventHide = false
+
+      return
+    }
+
+    if (
+      event?.relatedTarget
+      && this.element.parentNode?.contains(event.relatedTarget as Node)
+    ) {
+      return
+    }
+
+    this.hide()
+  }
+
+  update(view: EditorView, oldState?: EditorState) {
+    const { state, composing } = view
+    const { doc, selection } = state
+    const isSame = oldState && oldState.doc.eq(doc) && oldState.selection.eq(selection)
+
+    if (composing || isSame) {
+      return
+    }
+
+    const { anchor, empty } = selection
+    const parent = this.element.offsetParent
+    const currentDom = view.domAtPos(anchor)
+    const currentElement = currentDom.node as Element
+    const isActive = currentElement.innerHTML === '<br>'
+      && currentElement.tagName === 'P'
+      && currentElement.parentNode === view.dom
+
+    if (!empty || !parent || !isActive) {
+      this.hide()
+
+      return
+    }
+
+    const parentBox = parent.getBoundingClientRect()
+    const cursorCoords = view.coordsAtPos(anchor)
+    const top = cursorCoords.top - parentBox.top
+
+    this.isActive = true
+    this.top = top
+
+    this.render()
+  }
+
+  render() {
+    Object.assign(this.element.style, {
+      position: 'absolute',
+      zIndex: 1,
+      visibility: this.isActive ? 'visible' : 'hidden',
+      opacity: this.isActive ? 1 : 0,
+      // left: `${this.left}px`,
+      top: `${this.top}px`,
+      // bottom: `${this.bottom}px`,
+    })
+  }
+
+  hide() {
+    this.isActive = false
+    this.render()
+  }
+
+  destroy() {
+    this.element.removeEventListener('mousedown', this.mousedownHandler)
+    this.editor.off('focus', this.focusHandler)
+    this.editor.off('blur', this.blurHandler)
+  }
+}
+
+export const FloatingMenuPluginKey = new PluginKey('menuFloating')
+
+export const FloatingMenuPlugin = (options: FloatingMenuPluginProps) => {
+  return new Plugin({
+    key: FloatingMenuPluginKey,
+    view: view => new FloatingMenuView({ view, ...options }),
+  })
+}

packages/extension-floating-menu/src/floating-menu.ts

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+import { Extension } from '@tiptap/core'
+import { FloatingMenuPlugin, FloatingMenuPluginProps } from './floating-menu-plugin'
+
+export type FloatingMenuOptions = Omit<FloatingMenuPluginProps, 'editor' | 'element'> & {
+  element: HTMLElement | null,
+}
+
+export const FloatingMenu = Extension.create<FloatingMenuOptions>({
+  name: 'bubbleMenu',
+
+  defaultOptions: {
+    element: null,
+  },
+
+  addProseMirrorPlugins() {
+    if (!this.options.element) {
+      return []
+    }
+
+    return [
+      FloatingMenuPlugin({
+        editor: this.editor,
+        element: this.options.element,
+      }),
+    ]
+  },
+})

packages/extension-floating-menu/src/index.ts

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+import { FloatingMenu } from './floating-menu'
+
+export * from './floating-menu'
+export * from './floating-menu-plugin'
+
+export default FloatingMenu