refactor(editor): rename block-std to std (#11250)

Closes: BS-2946

blocksuite/framework/std/src/extension/widget-view-map.ts

@@ -0,0 +1,40 @@
+import type { ExtensionType } from '@blocksuite/store';
+
+import { WidgetViewIdentifier } from '../identifier.js';
+import type { WidgetViewType } from '../spec/type.js';
+
+/**
+ * Create a widget view extension.
+ *
+ * @param flavour The flavour of the block that the widget view is for.
+ * @param id The id of the widget view.
+ * @param view The widget view lit literal.
+ *
+ * A widget view is to provide a widget view for a block.
+ * For every target block, it's view will be rendered with the widget view.
+ *
+ * @example
+ * ```ts
+ * import { WidgetViewExtension } from '@blocksuite/std';
+ *
+ * const MyWidgetViewExtension = WidgetViewExtension('my-flavour', 'my-widget', literal`my-widget-view`);
+ */
+export function WidgetViewExtension(
+  flavour: string,
+  id: string,
+  view: WidgetViewType
+): ExtensionType {
+  return {
+    setup: di => {
+      if (flavour.includes('|') || id.includes('|')) {
+        console.error(`Register view failed:`);
+        console.error(
+          `flavour or id cannot include '|', flavour: ${flavour}, id: ${id}`
+        );
+        return;
+      }
+      const key = `${flavour}|${id}`;
+      di.addImpl(WidgetViewIdentifier(key), view);
+    },
+  };
+}