refactor(editor): improve element adapters (#11473)

blocksuite/affine/gfx/group/src/adapter/index.ts

@@ -0,0 +1,2 @@
+export * from './markdown';
+export * from './plain-text';

blocksuite/affine/gfx/group/src/adapter/markdown/index.ts

@@ -0,0 +1,25 @@
+import { ElementToMarkdownAdapterExtension } from '@blocksuite/affine-block-surface';
+
+import { getGroupTitle } from '../text';
+
+export const groupToMarkdownAdapterMatcher = ElementToMarkdownAdapterExtension({
+  name: 'group',
+  match: elementModel => elementModel.type === 'group',
+  toAST: elementModel => {
+    const title = getGroupTitle(elementModel);
+    if (!title) {
+      return null;
+    }
+
+    const content = `Group, with title "${title}"`;
+    return {
+      type: 'paragraph',
+      children: [
+        {
+          type: 'text',
+          value: content,
+        },
+      ],
+    };
+  },
+});

blocksuite/affine/gfx/group/src/adapter/plain-text/index.ts

@@ -0,0 +1,14 @@
+import { ElementToPlainTextAdapterExtension } from '@blocksuite/affine-block-surface';
+
+import { getGroupTitle } from '../text';
+
+export const groupToPlainTextAdapterMatcher =
+  ElementToPlainTextAdapterExtension({
+    name: 'group',
+    match: elementModel => elementModel.type === 'group',
+    toAST: elementModel => {
+      const title = getGroupTitle(elementModel);
+      const content = `Group, with title "${title}"`;
+      return { content };
+    },
+  });

blocksuite/affine/gfx/group/src/adapter/text.ts

@@ -0,0 +1,21 @@
+import type { DeltaInsert } from '@blocksuite/affine/store';
+
+export function getGroupTitle(elementModel: Record<string, unknown>): string {
+  let title = '';
+  if (elementModel.type !== 'group') {
+    return title;
+  }
+
+  if (
+    'title' in elementModel &&
+    typeof elementModel.title === 'object' &&
+    elementModel.title
+  ) {
+    let delta: DeltaInsert[] = [];
+    if ('delta' in elementModel.title) {
+      delta = elementModel.title.delta as DeltaInsert[];
+    }
+    title = delta.map(d => d.insert).join('');
+  }
+  return title;
+}

blocksuite/affine/gfx/group/src/index.ts

@@ -1,3 +1,4 @@
+export * from './adapter';
 export * from './command';
 export * from './element-renderer';
 export * from './text/text';