feat: add getText() and generateText() methods (fix #1428) (#1875)

* move getTextBetween method

* add getText method

* refactoring

* refactoring

* refactoring

* move renderText to schema, add generateText method

* add GenerateText demo

* docs: update

* remove demo from html page

packages/core/src/extensions/clipboardTextSerializer.ts

@@ -1,37 +1,6 @@
-import { Editor } from '@tiptap/core'
 import { Plugin, PluginKey } from 'prosemirror-state'
 import { Extension } from '../Extension'
-
-const textBetween = (
-  editor: Editor,
-  from: number,
-  to: number,
-  blockSeparator?: string,
-  leafText?: string,
-): string => {
-  let text = ''
-  let separated = true
-
-  editor.state.doc.nodesBetween(from, to, (node, pos) => {
-    const textSerializer = editor.extensionManager.textSerializers[node.type.name]
-
-    if (textSerializer) {
-      text += textSerializer({ node })
-      separated = !blockSeparator
-    } else if (node.isText) {
-      text += node?.text?.slice(Math.max(from, pos) - pos, to - pos)
-      separated = !blockSeparator
-    } else if (node.isLeaf && leafText) {
-      text += leafText
-      separated = !blockSeparator
-    } else if (!separated && node.isBlock) {
-      text += blockSeparator
-      separated = true
-    }
-  }, 0)
-
-  return text
-}
+import getTextBetween from '../helpers/getTextBetween'
 
 export const ClipboardTextSerializer = Extension.create({
   name: 'editable',
@@ -43,9 +12,15 @@ export const ClipboardTextSerializer = Extension.create({
         props: {
           clipboardTextSerializer: () => {
             const { editor } = this
-            const { from, to } = editor.state.selection
+            const { state, extensionManager } = editor
+            const { doc, selection } = state
+            const { from, to } = selection
+            const { textSerializers } = extensionManager
+            const range = { from, to }
 
-            return textBetween(editor, from, to, '\n')
+            return getTextBetween(doc, range, {
+              textSerializers,
+            })
           },
         },
       }),