refactor(editor): move focus block commands to blocksuite/shared (#10671)

blocksuite/affine/shared/src/commands/selection/focus-block-end.ts

@@ -0,0 +1,36 @@
+import {
+  type BlockComponent,
+  type Command,
+  TextSelection,
+} from '@blocksuite/block-std';
+
+/**
+ * Focus the end of the block
+ * @param focusBlock - The block to focus
+ * @param force - If set to true, the selection will be cleared.
+ * It is useful when the selection is same.
+ */
+export const focusBlockEnd: Command<{
+  focusBlock?: BlockComponent;
+  force?: boolean;
+}> = (ctx, next) => {
+  const { focusBlock, force, std } = ctx;
+  if (!focusBlock || !focusBlock.model.text) return;
+
+  const { selection } = std;
+
+  if (force) selection.clear();
+
+  selection.setGroup('note', [
+    selection.create(TextSelection, {
+      from: {
+        blockId: focusBlock.blockId,
+        index: focusBlock.model.text.length,
+        length: 0,
+      },
+      to: null,
+    }),
+  ]);
+
+  return next();
+};