chore: merge blocksuite source code (#9213)

blocksuite/blocks/src/root-block/adapters/markdown.ts

@@ -0,0 +1,36 @@
+import { RootBlockSchema } from '@blocksuite/affine-model';
+import {
+  BlockMarkdownAdapterExtension,
+  type BlockMarkdownAdapterMatcher,
+} from '@blocksuite/affine-shared/adapters';
+import type { DeltaInsert } from '@blocksuite/inline';
+
+export const rootBlockMarkdownAdapterMatcher: BlockMarkdownAdapterMatcher = {
+  flavour: RootBlockSchema.model.flavour,
+  toMatch: () => false,
+  fromMatch: o => o.node.flavour === RootBlockSchema.model.flavour,
+  toBlockSnapshot: {},
+  fromBlockSnapshot: {
+    enter: (o, context) => {
+      const title = (o.node.props.title ?? { delta: [] }) as {
+        delta: DeltaInsert[];
+      };
+      const { walkerContext, deltaConverter } = context;
+      if (title.delta.length === 0) return;
+      walkerContext
+        .openNode(
+          {
+            type: 'heading',
+            depth: 1,
+            children: deltaConverter.deltaToAST(title.delta, 0),
+          },
+          'children'
+        )
+        .closeNode();
+    },
+  },
+};
+
+export const RootBlockMarkdownAdapterExtension = BlockMarkdownAdapterExtension(
+  rootBlockMarkdownAdapterMatcher
+);