fix: VSCode markdown pasting (#857)

* fix vscode markdown pasting

* fix markdown -> html formatting

apps/client/src/features/editor/extensions/markdown-clipboard.ts

@@ -7,7 +7,7 @@ import { markdownToHtml } from "@docmost/editor-ext";
 
 export const MarkdownClipboard = Extension.create({
   name: "markdownClipboard",
-  priority: 50,
+  priority: 101,
 
   addOptions() {
     return {
@@ -19,6 +19,40 @@ export const MarkdownClipboard = Extension.create({
       new Plugin({
         key: new PluginKey("markdownClipboard"),
         props: {
+          handlePaste: (view, event, slice) => {
+            if (!event.clipboardData) {
+              return false;
+            }
+
+            if (this.editor.isActive("codeBlock")) {
+              return false;
+            }
+
+            const text = event.clipboardData.getData("text/plain");
+            const vscode = event.clipboardData.getData("vscode-editor-data");
+            const vscodeData = vscode ? JSON.parse(vscode) : undefined;
+            const language = vscodeData?.mode;
+
+            if (language !== "markdown") {
+              return false;
+            }
+
+            const { tr } = view.state;
+            const { from, to } = view.state.selection;
+
+            const html = markdownToHtml(text);
+
+            const contentNodes = DOMParser.fromSchema(
+              this.editor.schema,
+            ).parseSlice(elementFromString(html), {
+              preserveWhitespace: true,
+            });
+
+            tr.replaceRange(from, to, contentNodes);
+            tr.setMeta('paste', true)
+            view.dispatch(tr);
+            return true;
+          },
           clipboardTextParser: (text, context, plainText) => {
             const link = find(text, {
               defaultProtocol: "http",

packages/editor-ext/src/lib/markdown/utils/marked.utils.ts

@@ -1,6 +1,6 @@
-import { marked } from 'marked';
-import { calloutExtension } from './callout.marked';
-import { mathBlockExtension } from './math-block.marked';
+import { marked } from "marked";
+import { calloutExtension } from "./callout.marked";
+import { mathBlockExtension } from "./math-block.marked";
 import { mathInlineExtension } from "./math-inline.marked";
 
 marked.use({
@@ -8,11 +8,11 @@ marked.use({
     // @ts-ignore
     list(body: string, isOrdered: boolean, start: number) {
       if (isOrdered) {
-        const startAttr = start !== 1 ? ` start="${start}"` : '';
+        const startAttr = start !== 1 ? ` start="${start}"` : "";
         return `<ol ${startAttr}>\n${body}</ol>\n`;
       }
 
-      const dataType = body.includes(`<input`) ? ' data-type="taskList"' : '';
+      const dataType = body.includes(`<input`) ? ' data-type="taskList"' : "";
       return `<ul${dataType}>\n${body}</ul>\n`;
     },
     // @ts-ignore
@@ -28,14 +28,22 @@ marked.use({
   },
 });
 
-marked.use({ extensions: [calloutExtension, mathBlockExtension, mathInlineExtension] });
+marked.use({
+  extensions: [calloutExtension, mathBlockExtension, mathInlineExtension],
+});
 
-export function markdownToHtml(markdownInput: string): string | Promise<string> {
+export function markdownToHtml(
+  markdownInput: string,
+): string | Promise<string> {
   const YAML_FONT_MATTER_REGEX = /^\s*---[\s\S]*?---\s*/;
 
   const markdown = markdownInput
-    .replace(YAML_FONT_MATTER_REGEX, '')
+    .replace(YAML_FONT_MATTER_REGEX, "")
     .trimStart();
 
-  return marked.parse(markdown);
+  return marked
+    .options({ breaks: true })
+    .parse(markdown)
+    .toString()
+    .replace(/\n/g, "");
 }