fix: Make quote blocks isolating

packages/core/src/blocks/Quote/block.ts

@@ -23,9 +23,6 @@ export const createQuoteBlockConfig = createBlockConfig(
 export const createQuoteBlockSpec = createBlockSpec(
   createQuoteBlockConfig,
   {
-    meta: {
-      isolating: false,
-    },
     parse(element) {
       if (element.tagName === "BLOCKQUOTE") {
         const { backgroundColor, textColor } = parseDefaultProps(element);

tests/src/unit/core/clipboard/paste/__snapshots__/text/html/pasteEmptyQuote.json

@@ -0,0 +1,18 @@
+[
+  {
+    "children": [],
+    "content": [
+      {
+        "styles": {},
+        "text": "Paragraph",
+        "type": "text",
+      },
+    ],
+    "id": "1",
+    "props": {
+      "backgroundColor": "default",
+      "textColor": "default",
+    },
+    "type": "quote",
+  },
+]

tests/src/unit/core/clipboard/paste/pasteTestInstances.ts

@@ -10,7 +10,10 @@ import {
   testPasteHTML,
   testPasteMarkdown,
 } from "../../../shared/clipboard/paste/pasteTestExecutors.js";
-import { getPosOfTextNode } from "../../../shared/testUtil.js";
+import {
+  getPosInEmptyBlockContentNode,
+  getPosOfTextNode,
+} from "../../../shared/testUtil.js";
 import { TestInstance } from "../../../types.js";
 
 export const pasteTestInstancesHTML: TestInstance<
@@ -137,6 +140,23 @@ export const pasteTestInstancesHTML: TestInstance<
     },
     executeTest: testPasteHTML,
   },
+  {
+    testCase: {
+      name: "pasteEmptyQuote",
+      content: `<p>Paragraph</p>`,
+      document: [
+        {
+          type: "quote",
+        },
+      ],
+      getPasteSelection: (doc) => {
+        const startPos = getPosInEmptyBlockContentNode(doc, "quote");
+
+        return TextSelection.create(doc, startPos);
+      },
+    },
+    executeTest: testPasteHTML,
+  },
 ];
 
 export const pasteTestInstancesMarkdown: TestInstance<

tests/src/unit/core/schema/__snapshots__/blocks.json

@@ -434,9 +434,6 @@
       [Function],
     ],
     "implementation": {
-      "meta": {
-        "isolating": false,
-      },
       "node": null,
       "parse": [Function],
       "render": [Function],

tests/src/unit/shared/testUtil.ts

@@ -34,6 +34,32 @@ export const getPosOfTextNode = (
   return ret;
 };
 
+// Helper function to get the position inside an empty block content node with
+// the given type.
+export const getPosInEmptyBlockContentNode = (
+  doc: Node,
+  blockContentType: string,
+) => {
+  let ret: number | undefined = undefined;
+
+  doc.descendants((node, pos) => {
+    if (node.type.name === blockContentType && node.childCount === 0) {
+      ret = pos + 1;
+      return false;
+    }
+
+    return ret === undefined;
+  });
+
+  if (ret === undefined) {
+    throw new Error(
+      `Block content node with type "${blockContentType}" not found.`,
+    );
+  }
+
+  return ret;
+};
+
 // Helper function to get the position of a table cell node with given text
 // content. Returns the position just before the node.
 export const getPosOfTableCellNode = (doc: Node, textContent: string) => {