switch to nx monorepo

apps/client/src/features/editor/extensions/trailing-node.ts

@@ -0,0 +1,69 @@
+import { Extension } from '@tiptap/core'
+import { PluginKey, Plugin } from '@tiptap/pm/state';
+
+export interface TrailingNodeExtensionOptions {
+  node: string,
+  notAfter: string[],
+}
+
+function nodeEqualsType({ types, node }: { types: any, node: any }) {
+  return (Array.isArray(types) && types.includes(node.type)) || node.type === types
+}
+
+// @ts-ignore
+/**
+ * Extension based on:
+ * - https://github.com/ueberdosis/tiptap/blob/v1/packages/tiptap-extensions/src/extensions/TrailingNode.js
+ * - https://github.com/remirror/remirror/blob/e0f1bec4a1e8073ce8f5500d62193e52321155b9/packages/prosemirror-trailing-node/src/trailing-node-plugin.ts
+ */
+export const TrailingNode = Extension.create<TrailingNodeExtensionOptions>({
+  name: 'trailingNode',
+
+  addOptions() {
+    return {
+      node: 'paragraph',
+      notAfter: [
+        'paragraph',
+      ],
+    };
+  },
+
+  addProseMirrorPlugins() {
+    const plugin = new PluginKey(this.name)
+    const disabledNodes = Object.entries(this.editor.schema.nodes)
+      .map(([, value]) => value)
+      .filter(node => this.options.notAfter.includes(node.name))
+
+    return [
+      new Plugin({
+        key: plugin,
+        appendTransaction: (_, __, state) => {
+          const { doc, tr, schema } = state;
+          const shouldInsertNodeAtEnd = plugin.getState(state);
+          const endPosition = doc.content.size;
+          const type = schema.nodes[this.options.node]
+
+          if (!shouldInsertNodeAtEnd) {
+            return;
+          }
+
+          return tr.insert(endPosition, type.create());
+        },
+        state: {
+          init: (_, state) => {
+            const lastNode = state.tr.doc.lastChild
+            return !nodeEqualsType({ node: lastNode, types: disabledNodes })
+          },
+          apply: (tr, value) => {
+            if (!tr.docChanged) {
+              return value
+            }
+
+            const lastNode = tr.doc.lastChild
+            return !nodeEqualsType({ node: lastNode, types: disabledNodes })
+          },
+        },
+      }),
+    ]
+  }
+})