From 7c58654fe827cf0508b4e03555412753a99b6d85 Mon Sep 17 00:00:00 2001
From: Vincent Chan <okcdz@diverse.space>
Date: Tue, 9 Aug 2022 13:33:54 +0800
Subject: [PATCH] fix: undo redo handler

---
 .../flowy_editor/lib/service/editor_service.dart  |  2 ++
 .../redo_undo_handler.dart                        | 15 +++++++++++++++
 2 files changed, 17 insertions(+)
 create mode 100644 frontend/app_flowy/packages/flowy_editor/lib/service/internal_key_event_handlers/redo_undo_handler.dart

diff --git a/frontend/app_flowy/packages/flowy_editor/lib/service/editor_service.dart b/frontend/app_flowy/packages/flowy_editor/lib/service/editor_service.dart
index 78f7bb76fa..2d042377e1 100644
--- a/frontend/app_flowy/packages/flowy_editor/lib/service/editor_service.dart
+++ b/frontend/app_flowy/packages/flowy_editor/lib/service/editor_service.dart
@@ -17,6 +17,7 @@ import 'package:flowy_editor/service/internal_key_event_handlers/enter_without_s
 import 'package:flowy_editor/service/internal_key_event_handlers/slash_handler.dart';
 import 'package:flowy_editor/service/internal_key_event_handlers/update_text_style_by_command_x_handler.dart';
 import 'package:flowy_editor/service/internal_key_event_handlers/whitespace_handler.dart';
+import 'package:flowy_editor/service/internal_key_event_handlers/redo_undo_handler.dart';
 import 'package:flowy_editor/service/keyboard_service.dart';
 import 'package:flowy_editor/service/render_plugin_service.dart';
 import 'package:flowy_editor/service/scroll_service.dart';
@@ -39,6 +40,7 @@ List<FlowyKeyEventHandler> defaultKeyEventHandler = [
   flowyDeleteNodesHandler,
   arrowKeysHandler,
   copyPasteKeysHandler,
+  redoUndoKeysHandler,
   enterWithoutShiftInTextNodesHandler,
   updateTextStyleByCommandXHandler,
   whiteSpaceHandler,
diff --git a/frontend/app_flowy/packages/flowy_editor/lib/service/internal_key_event_handlers/redo_undo_handler.dart b/frontend/app_flowy/packages/flowy_editor/lib/service/internal_key_event_handlers/redo_undo_handler.dart
new file mode 100644
index 0000000000..75b22402e4
--- /dev/null
+++ b/frontend/app_flowy/packages/flowy_editor/lib/service/internal_key_event_handlers/redo_undo_handler.dart
@@ -0,0 +1,15 @@
+import 'package:flowy_editor/service/keyboard_service.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+
+FlowyKeyEventHandler redoUndoKeysHandler = (editorState, event) {
+  if (event.isMetaPressed && event.logicalKey == LogicalKeyboardKey.keyZ) {
+    if (event.isShiftPressed) {
+      editorState.undoManager.redo();
+    } else {
+      editorState.undoManager.undo();
+    }
+    return KeyEventResult.handled;
+  }
+  return KeyEventResult.ignored;
+};