fix callout

apps/client/src/features/editor/components/audio/audio-menu.tsx

@@ -2,6 +2,7 @@ import { BubbleMenu as BaseBubbleMenu } from "@tiptap/react/menus";
 import { findParentNode, posToDOMRect, useEditorState } from "@tiptap/react";
 import { useCallback } from "react";
 import { Node as PMNode } from "@tiptap/pm/model";
+import { isEditorReady } from "@docmost/editor-ext";
 import {
   EditorMenuProps,
   ShouldShowProps,
@@ -46,7 +47,7 @@ export function AudioMenu({ editor }: EditorMenuProps) {
   );
 
   const getReferencedVirtualElement = useCallback(() => {
-    if (!editor) return;
+    if (!isEditorReady(editor)) return;
     const { selection } = editor.state;
     const predicate = (node: PMNode) => node.type.name === "audio";
     const parent = findParentNode(predicate)(selection);

apps/client/src/features/editor/components/callout/callout-menu.tsx

@@ -16,7 +16,7 @@ import {
   IconMoodSmile,
   IconNotes,
 } from "@tabler/icons-react";
-import { CalloutType, isTextSelected } from "@docmost/editor-ext";
+import { CalloutType, isEditorReady, isTextSelected } from "@docmost/editor-ext";
 import { useTranslation } from "react-i18next";
 import EmojiPicker from "@/components/ui/emoji-picker.tsx";
 import classes from "../common/toolbar-menu.module.css";
@@ -55,7 +55,7 @@ export function CalloutMenu({ editor }: EditorMenuProps) {
   });
 
   const getReferencedVirtualElement = useCallback(() => {
-    if (!editor) return;
+    if (!isEditorReady(editor)) return;
     const { selection } = editor.state;
     const predicate = (node: PMNode) => node.type.name === "callout";
     const parent = findParentNode(predicate)(selection);

apps/client/src/features/editor/components/columns/columns-menu.tsx

@@ -19,7 +19,7 @@ import {
   IconCopy,
   IconTrash,
 } from "@tabler/icons-react";
-import { isTextSelected } from "@docmost/editor-ext";
+import { isEditorReady, isTextSelected } from "@docmost/editor-ext";
 import type { WidthMode, ColumnsLayout } from "@docmost/editor-ext";
 import { useTranslation } from "react-i18next";
 import classes from "../common/toolbar-menu.module.css";
@@ -82,7 +82,7 @@ export function ColumnsMenu({ editor }: EditorMenuProps) {
 
   const shouldShow = useCallback(
     ({ state }: ShouldShowProps) => {
-      if (!state) return false;
+      if (!state || !isEditorReady(editor)) return false;
       if (!editor.isActive("columns")) return false;
       if (isTextSelected(editor)) return false;
       if (nodesWithMenus.some((name) => editor.isActive(name))) return false;
@@ -121,7 +121,7 @@ export function ColumnsMenu({ editor }: EditorMenuProps) {
   });
 
   const getReferencedVirtualElement = useCallback(() => {
-    if (!editor) return;
+    if (!isEditorReady(editor)) return;
     const { selection } = editor.state;
     const predicate = (node: PMNode) => node.type.name === "columns";
     const parent = findParentNode(predicate)(selection);

apps/client/src/features/editor/components/drawio/drawio-menu.tsx

@@ -2,6 +2,7 @@ import { BubbleMenu as BaseBubbleMenu } from "@tiptap/react/menus";
 import { findParentNode, posToDOMRect, useEditorState } from "@tiptap/react";
 import { useCallback, useEffect, useRef, useState } from "react";
 import { Node as PMNode } from "@tiptap/pm/model";
+import { isEditorReady } from "@docmost/editor-ext";
 import {
   EditorMenuProps,
   ShouldShowProps,
@@ -81,7 +82,7 @@ export function DrawioMenu({ editor }: EditorMenuProps) {
   );
 
   const getReferencedVirtualElement = useCallback(() => {
-    if (!editor) return;
+    if (!isEditorReady(editor)) return;
     const { selection } = editor.state;
     const predicate = (node: PMNode) => node.type.name === "drawio";
     const parent = findParentNode(predicate)(selection);

apps/client/src/features/editor/components/excalidraw/excalidraw-menu-lazy.tsx

@@ -0,0 +1,14 @@
+import { lazy, Suspense } from "react";
+import { EditorMenuProps } from "@/features/editor/components/table/types/types.ts";
+
+const ExcalidrawMenu = lazy(
+  () => import("@/features/editor/components/excalidraw/excalidraw-menu.tsx"),
+);
+
+export default function ExcalidrawMenuLazy(props: EditorMenuProps) {
+  return (
+    <Suspense fallback={null}>
+      <ExcalidrawMenu {...props} />
+    </Suspense>
+  );
+}

apps/client/src/features/editor/components/excalidraw/excalidraw-menu.tsx

@@ -2,6 +2,7 @@ import { BubbleMenu as BaseBubbleMenu } from "@tiptap/react/menus";
 import { findParentNode, posToDOMRect, useEditorState } from "@tiptap/react";
 import { lazy, Suspense, useCallback, useEffect, useRef, useState } from "react";
 import { Node as PMNode } from "@tiptap/pm/model";
+import { isEditorReady } from "@docmost/editor-ext";
 import {
   EditorMenuProps,
   ShouldShowProps,
@@ -94,7 +95,7 @@ export function ExcalidrawMenu({ editor }: EditorMenuProps) {
   );
 
   const getReferencedVirtualElement = useCallback(() => {
-    if (!editor) return;
+    if (!isEditorReady(editor)) return;
     const { selection } = editor.state;
     const predicate = (node: PMNode) => node.type.name === "excalidraw";
     const parent = findParentNode(predicate)(selection);

apps/client/src/features/editor/components/excalidraw/excalidraw-view-lazy.tsx

@@ -0,0 +1,14 @@
+import { lazy, Suspense } from "react";
+import { NodeViewProps } from "@tiptap/react";
+
+const ExcalidrawView = lazy(
+  () => import("@/features/editor/components/excalidraw/excalidraw-view.tsx"),
+);
+
+export default function ExcalidrawViewLazy(props: NodeViewProps) {
+  return (
+    <Suspense fallback={null}>
+      <ExcalidrawView {...props} />
+    </Suspense>
+  );
+}

apps/client/src/features/editor/components/image/image-menu.tsx

@@ -2,6 +2,7 @@ import { BubbleMenu as BaseBubbleMenu } from "@tiptap/react/menus";
 import { findParentNode, posToDOMRect, useEditorState } from "@tiptap/react";
 import React, { useCallback, useRef } from "react";
 import { Node as PMNode } from "@tiptap/pm/model";
+import { isEditorReady } from "@docmost/editor-ext";
 import {
   EditorMenuProps,
   ShouldShowProps,
@@ -56,7 +57,7 @@ export function ImageMenu({ editor }: EditorMenuProps) {
   );
 
   const getReferencedVirtualElement = useCallback(() => {
-    if (!editor) return;
+    if (!isEditorReady(editor)) return;
     const { selection } = editor.state;
     const predicate = (node: PMNode) => node.type.name === "image";
     const parent = findParentNode(predicate)(selection);

apps/client/src/features/editor/components/pdf/pdf-menu.tsx

@@ -2,6 +2,7 @@ import { BubbleMenu as BaseBubbleMenu } from "@tiptap/react/menus";
 import { findParentNode, posToDOMRect, useEditorState } from "@tiptap/react";
 import { useCallback } from "react";
 import { Node as PMNode } from "@tiptap/pm/model";
+import { isEditorReady } from "@docmost/editor-ext";
 import {
   EditorMenuProps,
   ShouldShowProps,
@@ -37,9 +38,8 @@ export function PdfMenu({ editor }: EditorMenuProps) {
 
   const shouldShow = useCallback(
     ({ state }: ShouldShowProps) => {
-      if (!state || !editor.isActive("pdf")) {
+      if (!state || !isEditorReady(editor)) return false;
-        return false;
+      if (!editor.isActive("pdf")) return false;
-      }
 
       const { selection } = state;
       const dom = editor.view.nodeDOM(selection.from) as HTMLElement | null;
@@ -51,7 +51,7 @@ export function PdfMenu({ editor }: EditorMenuProps) {
   );
 
   const getReferencedVirtualElement = useCallback(() => {
-    if (!editor) return;
+    if (!isEditorReady(editor)) return;
     const { selection } = editor.state;
     const predicate = (node: PMNode) => node.type.name === "pdf";
     const parent = findParentNode(predicate)(selection);

apps/client/src/features/editor/components/subpages/subpages-menu.tsx

@@ -6,6 +6,7 @@ import { ActionIcon, Tooltip } from "@mantine/core";
 import { IconTrash } from "@tabler/icons-react";
 import { useTranslation } from "react-i18next";
 import { Editor } from "@tiptap/core";
+import { isEditorReady } from "@docmost/editor-ext";
 
 interface SubpagesMenuProps {
   editor: Editor;
@@ -33,6 +34,7 @@ export const SubpagesMenu = React.memo(
     );
 
     const getReferenceClientRect = useCallback(() => {
+      if (!isEditorReady(editor)) return new DOMRect();
       const { selection } = editor.state;
       const predicate = (node: PMNode) => node.type.name === "subpages";
       const parent = findParentNode(predicate)(selection);

apps/client/src/features/editor/components/table/handle/column-handle.tsx

@@ -31,7 +31,12 @@ export const ColumnHandle = React.memo(function ColumnHandle({
   // (the plugin re-emits `hoveringCell` with the mapped pos a tick later);
   // unmounting the source element here would make pragmatic-dnd silently
   // abort the active drag.
-  const lookupCellDom = editor.view.nodeDOM(anchorPos) as HTMLElement | null;
+  // `nodeDOM` is typed as `Node | null` — when `anchorPos` goes stale (e.g.
+  // an external drop reflows the doc before the plugin re-emits
+  // hoveringCell), it can resolve to a Text node, on which `.closest` is
+  // undefined. Filter to HTMLElement so downstream consumers stay safe.
+  const lookupDom = editor.view.nodeDOM(anchorPos);
+  const lookupCellDom = lookupDom instanceof HTMLElement ? lookupDom : null;
   const [cellDom, setCellDom] = useState<HTMLElement | null>(lookupCellDom);
   const lastCellDomRef = useRef<HTMLElement | null>(lookupCellDom);
   useEffect(() => {

apps/client/src/features/editor/components/table/handle/row-handle.tsx

@@ -29,7 +29,12 @@ export const RowHandle = React.memo(function RowHandle({
   // See ColumnHandle for the rationale: keep the last valid cell DOM cached
   // so the handle div stays mounted across stale-anchor renders, otherwise
   // pragmatic-dnd silently aborts an in-flight drag.
-  const lookupCellDom = editor.view.nodeDOM(anchorPos) as HTMLElement | null;
+  // `nodeDOM` is typed as `Node | null` — when `anchorPos` goes stale (e.g.
+  // an external drop reflows the doc before the plugin re-emits
+  // hoveringCell), it can resolve to a Text node, on which `.closest` is
+  // undefined. Filter to HTMLElement so downstream consumers stay safe.
+  const lookupDom = editor.view.nodeDOM(anchorPos);
+  const lookupCellDom = lookupDom instanceof HTMLElement ? lookupDom : null;
   const [cellDom, setCellDom] = useState<HTMLElement | null>(lookupCellDom);
   const lastCellDomRef = useRef<HTMLElement | null>(lookupCellDom);
   useEffect(() => {

apps/client/src/features/editor/components/table/table-menu.tsx

@@ -18,7 +18,7 @@ import {
   IconTrashX,
 } from "@tabler/icons-react";
 import { BubbleMenu } from "@tiptap/react/menus";
-import { isCellSelection, isTextSelected } from "@docmost/editor-ext";
+import { isCellSelection, isEditorReady, isTextSelected } from "@docmost/editor-ext";
 import { useTranslation } from "react-i18next";
 import classes from "../common/toolbar-menu.module.css";
 
@@ -38,6 +38,7 @@ export const TableMenu = React.memo(
     );
 
     const getReferencedVirtualElement = useCallback(() => {
+      if (!isEditorReady(editor)) return;
       const { selection } = editor.state;
       const predicate = (node: PMNode) => node.type.name === "table";
       const parent = findParentNode(predicate)(selection);

apps/client/src/features/editor/components/video/video-menu.tsx

@@ -2,6 +2,7 @@ import { BubbleMenu as BaseBubbleMenu } from "@tiptap/react/menus";
 import { findParentNode, posToDOMRect, useEditorState } from "@tiptap/react";
 import { useCallback } from "react";
 import { Node as PMNode } from "@tiptap/pm/model";
+import { isEditorReady } from "@docmost/editor-ext";
 import {
   EditorMenuProps,
   ShouldShowProps,
@@ -53,7 +54,7 @@ export function VideoMenu({ editor }: EditorMenuProps) {
   );
 
   const getReferencedVirtualElement = useCallback(() => {
-    if (!editor) return;
+    if (!isEditorReady(editor)) return;
     const { selection } = editor.state;
     const predicate = (node: PMNode) => node.type.name === "video";
     const parent = findParentNode(predicate)(selection);

apps/client/src/features/editor/extensions/extensions.ts

@@ -85,7 +85,7 @@ import AudioView from "@/features/editor/components/audio/audio-view.tsx";
 import AttachmentView from "@/features/editor/components/attachment/attachment-view.tsx";
 import CodeBlockView from "@/features/editor/components/code-block/code-block-view.tsx";
 import DrawioView from "../components/drawio/drawio-view";
-import ExcalidrawView from "@/features/editor/components/excalidraw/excalidraw-view.tsx";
+import ExcalidrawView from "@/features/editor/components/excalidraw/excalidraw-view-lazy.tsx";
 import EmbedView from "@/features/editor/components/embed/embed-view.tsx";
 import PdfView from "@/features/editor/components/pdf/pdf-view.tsx";
 import SubpagesView from "@/features/editor/components/subpages/subpages-view.tsx";

apps/client/src/features/editor/page-editor.tsx

@@ -55,7 +55,7 @@ import {
   handleFileDrop,
   handlePaste,
 } from "@/features/editor/components/common/editor-paste-handler.tsx";
-import ExcalidrawMenu from "./components/excalidraw/excalidraw-menu";
+import ExcalidrawMenu from "./components/excalidraw/excalidraw-menu-lazy";
 import DrawioMenu from "./components/drawio/drawio-menu";
 import { useCollabToken } from "@/features/auth/queries/auth-query.tsx";
 import SearchAndReplaceDialog from "@/features/editor/components/search-and-replace/search-and-replace-dialog.tsx";

apps/client/vite.config.ts

@@ -38,12 +38,12 @@ export default defineConfig(({ mode }) => {
     build: {
       rolldownOptions: {
         output: {
-          codeSplitting: {
+          advancedChunks: {
             groups: [
-              { name: "vendor-mantine", test: /@mantine/ },
+              {
-              { name: "vendor-mermaid", test: /mermaid|cytoscape|elkjs/ },
+                name: "vendor-mantine",
-              { name: "vendor-excalidraw", test: /excalidraw/ },
+                test: /[\\/]node_modules[\\/]@mantine[\\/]/,
-              { name: "vendor-katex", test: /katex/ },
+              },
             ],
           },
         },

packages/editor-ext/src/lib/callout/callout.ts

@@ -162,6 +162,28 @@ export const Callout = Node.create<CalloutOptions>({
           return false;
         }
 
+        // Empty callout: delete the whole node so Backspace inside it isn't
+        // a no-op (isolating: true blocks the default join with the block
+        // above).
+        const calloutDepth = $from.depth - 1;
+        if (calloutDepth >= 0) {
+          const calloutNode = $from.node(calloutDepth);
+          if (
+            calloutNode.type === this.type &&
+            calloutNode.childCount === 1 &&
+            calloutNode.firstChild?.content.size === 0
+          ) {
+            const calloutPos = $from.before(calloutDepth);
+            const { tr } = state;
+            tr.delete(calloutPos, calloutPos + calloutNode.nodeSize);
+            tr.setSelection(
+              TextSelection.near(tr.doc.resolve(calloutPos), -1),
+            );
+            view.dispatch(tr);
+            return true;
+          }
+        }
+
         const previousPosition = $from.before($from.depth) - 1;
 
         // If nothing above to join with
@@ -207,6 +229,56 @@ export const Callout = Node.create<CalloutOptions>({
         }
         return false;
       },
+
+      // Exit the callout into a fresh paragraph below when the cursor sits
+      // in an empty trailing child. An empty callout (single empty
+      // paragraph) exits on the first Enter and keeps the empty callout
+      // intact; a callout with content needs the double-Enter pattern
+      // (first Enter splits, second Enter on the new trailing empty exits
+      // and removes that trailing paragraph).
+      Enter: ({ editor }) => {
+        const { state, view } = editor;
+        const { selection } = state;
+        if (!selection.empty) return false;
+
+        const { $from } = selection;
+        const calloutDepth = $from.depth - 1;
+        if (calloutDepth < 0) return false;
+
+        const calloutNode = $from.node(calloutDepth);
+        if (calloutNode.type !== this.type) return false;
+        if ($from.parent.content.size !== 0) return false;
+        if ($from.index(calloutDepth) !== calloutNode.childCount - 1) {
+          return false;
+        }
+
+        const paragraphType = state.schema.nodes.paragraph;
+        const containerDepth = calloutDepth - 1;
+        const container = $from.node(containerDepth);
+        const indexAfter = $from.indexAfter(containerDepth);
+        if (
+          !container.canReplaceWith(indexAfter, indexAfter, paragraphType)
+        ) {
+          return false;
+        }
+
+        const calloutEnd = $from.after(calloutDepth);
+        const paragraph = paragraphType.create();
+        const { tr } = state;
+
+        if (calloutNode.childCount === 1) {
+          tr.insert(calloutEnd, paragraph);
+          tr.setSelection(TextSelection.create(tr.doc, calloutEnd + 1));
+        } else {
+          tr.delete($from.before(), $from.after());
+          const insertPos = tr.mapping.map(calloutEnd);
+          tr.insert(insertPos, paragraph);
+          tr.setSelection(TextSelection.create(tr.doc, insertPos + 1));
+        }
+
+        view.dispatch(tr);
+        return true;
+      },
     };
   },
 

packages/editor-ext/src/lib/custom-code-block/custom-code-block.ts

@@ -1,5 +1,7 @@
 import type { CodeBlockOptions } from '@tiptap/extension-code-block';
 import CodeBlock from '@tiptap/extension-code-block';
+import { Plugin, Selection, TextSelection } from '@tiptap/pm/state';
+import { GapCursor } from '@tiptap/pm/gapcursor';
 
 import { LowlightPlugin } from './lowlight-plugin.js';
 import { ReactNodeViewRenderer } from '@tiptap/react';
@@ -19,7 +21,11 @@ const TAB_CHAR = '\u00A0\u00A0';
  * @see https://tiptap.dev/api/nodes/code-block-lowlight
  */
 export const CustomCodeBlock = CodeBlock.extend<CodeBlockLowlightOptions>({
+  // Run ahead of Gapcursor (100) so the mermaid arrow-into-source plugin
+  // can intercept before gapcursor takes over.
+  priority: 101,
   selectable: true,
+  isolating: true,
 
   addOptions() {
     return {
@@ -35,8 +41,86 @@ export const CustomCodeBlock = CodeBlock.extend<CodeBlockLowlightOptions>({
   },
 
   addKeyboardShortcuts() {
+    const isMermaid = (node: any) =>
+      node?.type === this.type && node.attrs.language === 'mermaid';
+
     return {
       ...this.parent?.(),
+      // Stop at the gap (or enter mermaid source) instead of jumping
+      // straight into the next block, so the user can place a cursor
+      // between two adjacent isolating blocks.
+      ArrowDown: ({ editor }) => {
+        const { state } = editor;
+        const { selection, doc } = state;
+        const { $from, empty } = selection;
+
+        if (!empty || $from.parent.type !== this.type) return false;
+        if ($from.parentOffset !== $from.parent.nodeSize - 2) return false;
+
+        const after = $from.after();
+        if (after >= doc.content.size) {
+          return editor.commands.exitCode();
+        }
+
+        const $after = doc.resolve(after);
+        const nodeAfter = $after.nodeAfter;
+
+        if (isMermaid(nodeAfter)) {
+          return editor.commands.command(({ tr }) => {
+            tr.setSelection(TextSelection.create(tr.doc, after + 1));
+            return true;
+          });
+        }
+
+        if (
+          nodeAfter?.type.spec.isolating &&
+          !nodeAfter.type.spec.atom
+        ) {
+          return editor.commands.command(({ tr }) => {
+            tr.setSelection(new GapCursor(tr.doc.resolve(after)));
+            return true;
+          });
+        }
+
+        return editor.commands.command(({ tr }) => {
+          tr.setSelection(Selection.near(tr.doc.resolve(after)));
+          return true;
+        });
+      },
+      // Mirror of ArrowDown; upstream has no ArrowUp handler.
+      ArrowUp: ({ editor }) => {
+        const { state } = editor;
+        const { selection, doc } = state;
+        const { $from, empty } = selection;
+
+        if (!empty || $from.parent.type !== this.type) return false;
+        if ($from.parentOffset !== 0) return false;
+
+        const before = $from.before();
+        if (before <= 0) return false;
+
+        const $before = doc.resolve(before);
+        const nodeBefore = $before.nodeBefore;
+
+        if (isMermaid(nodeBefore)) {
+          return editor.commands.command(({ tr }) => {
+            tr.setSelection(TextSelection.create(tr.doc, before - 1));
+            return true;
+          });
+        }
+
+        if (
+          nodeBefore?.type.spec.isolating &&
+          !nodeBefore.type.spec.atom
+        ) {
+          return editor.commands.command(({ tr }) => {
+            tr.setSelection(new GapCursor(tr.doc.resolve(before)));
+            return true;
+          });
+        }
+
+        return false;
+      },
       'Mod-a': () => {
         if (this.editor.isActive('codeBlock')) {
           const { state } = this.editor;
@@ -84,6 +168,7 @@ export const CustomCodeBlock = CodeBlock.extend<CodeBlockLowlightOptions>({
   },
 
   addProseMirrorPlugins() {
+    const codeBlockType = this.type;
     return [
       ...(this.parent?.() || []),
       LowlightPlugin({
@@ -91,6 +176,60 @@ export const CustomCodeBlock = CodeBlock.extend<CodeBlockLowlightOptions>({
         lowlight: this.options.lowlight,
         defaultLanguage: this.options.defaultLanguage,
       }),
+      // Mermaid hides its <pre> when unselected, so the browser's native
+      // vertical caret movement skips past it. Land the cursor inside the
+      // source explicitly.
+      new Plugin({
+        props: {
+          handleKeyDown: (view, event) => {
+            if (event.key !== 'ArrowUp' && event.key !== 'ArrowDown') {
+              return false;
+            }
+            const { state } = view;
+            const { selection } = state;
+            if (
+              !selection.empty ||
+              !(selection instanceof TextSelection)
+            ) {
+              return false;
+            }
+            const { $from } = selection;
+            if ($from.depth === 0 || $from.parent.type === codeBlockType) {
+              return false;
+            }
+            const dir = event.key === 'ArrowUp' ? 'up' : 'down';
+            if (!view.endOfTextblock(dir)) return false;
+
+            const isMermaid = (node: any) =>
+              node?.type === codeBlockType && node.attrs.language === 'mermaid';
+
+            if (event.key === 'ArrowUp') {
+              if ($from.parentOffset !== 0) return false;
+              const beforePos = $from.before();
+              const prev = state.doc.resolve(beforePos).nodeBefore;
+              if (!isMermaid(prev)) return false;
+              const endPos = beforePos - 1;
+              view.dispatch(
+                state.tr.setSelection(
+                  TextSelection.create(state.doc, endPos),
+                ),
+              );
+              return true;
+            }
+            if ($from.parentOffset !== $from.parent.nodeSize - 2) return false;
+            const afterPos = $from.after();
+            const next = state.doc.resolve(afterPos).nodeAfter;
+            if (!isMermaid(next)) return false;
+            const startPos = afterPos + 1;
+            view.dispatch(
+              state.tr.setSelection(
+                TextSelection.create(state.doc, startPos),
+              ),
+            );
+            return true;
+          },
+        },
+      }),
     ];
   },
 });

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

@@ -338,6 +338,15 @@ export const isRowGripSelected = ({
   return !!gripRow;
 };
 
+// TipTap's `editor.view` proxy throws if accessed before mount or after destroy.
+// Guard floating-menu callbacks (getReferencedVirtualElement, shouldShow) with
+// this before touching `editor.view.nodeDOM(...)`.
+export function isEditorReady(
+  editor: Editor | null | undefined,
+): editor is Editor {
+  return !!editor && editor.isInitialized;
+}
+
 export function isTextSelected(editor: Editor) {
   const {
     state: {