Toggle current todo item with Mod-Enter

shared/editor/commands/toggleBlockType.ts

@@ -3,6 +3,13 @@ import { NodeType } from "prosemirror-model";
 import { Command } from "prosemirror-state";
 import isNodeActive from "../queries/isNodeActive";
 
+/**
+ * Toggles the block type of the current selection between the given type and the toggle type.
+ *
+ * @param type The node type
+ * @param toggleType The toggle node type
+ * @returns A prosemirror command.
+ */
 export default function toggleBlockType(
   type: NodeType,
   toggleType: NodeType,

shared/editor/commands/toggleCheckboxItem.ts

@@ -0,0 +1,34 @@
+import { Command } from "prosemirror-state";
+import { findParentNode } from "@shared/editor/queries/findParentNode";
+
+/**
+ * A prosemirror command to toggle the checkbox item at the current selection.
+ *
+ * @returns A prosemirror command.
+ */
+export default function toggleCheckboxItem(): Command {
+  return (state, dispatch) => {
+    const { empty } = state.selection;
+
+    // if the selection has anything in it then use standard behavior
+    if (!empty) {
+      return false;
+    }
+
+    // check we're in a matching node
+    const listItem = findParentNode(
+      (node) => node.type === state.schema.nodes.checkbox_item
+    )(state.selection);
+
+    if (!listItem) {
+      return false;
+    }
+
+    dispatch?.(
+      state.tr.setNodeMarkup(listItem.pos, undefined, {
+        checked: !listItem.node.attrs.checked,
+      })
+    );
+    return true;
+  };
+}