fix Safari responds to the EnterKey from IM

packages/roosterjs-content-model-plugins/lib/edit/EditPlugin.ts

@@ -2,6 +2,7 @@ import { keyboardDelete } from './keyboardDelete';
 import { keyboardEnter } from './keyboardEnter';
 import { keyboardInput } from './keyboardInput';
 import { keyboardTab } from './keyboardTab';
+import { KeyCode } from './keyCode';
 import { parseTableCells } from 'roosterjs-content-model-dom';
 import type {
     DOMSelection,
@@ -181,7 +182,11 @@ export class EditPlugin implements EditorPlugin {
                     break;
 
                 case 'Enter':
-                    if (!hasCtrlOrMetaKey) {
+                    if (
+                        !hasCtrlOrMetaKey &&
+                        !event.rawEvent.isComposing &&
+                        event.rawEvent.keyCode !== KeyCode.dead
+                    ) {
                         keyboardEnter(editor, rawEvent, this.handleNormalEnter);
                     }
                     break;

packages/roosterjs-content-model-plugins/lib/edit/keyCode.ts

@@ -0,0 +1,12 @@
+/**
+ * Key code enumeration
+ */
+export const enum KeyCode {
+    /**
+     * According to https://lists.w3.org/Archives/Public/www-dom/2010JulSep/att-0182/keyCode-spec.html
+     * 229 can be sent in variants generated when Long press (iOS) or using IM.
+     *
+     * Other cases: https://stackoverflow.com/questions/25043934/is-it-ok-to-ignore-keydown-events-with-keycode-229
+     */
+    dead = 229,
+}

packages/roosterjs-content-model-plugins/test/edit/EditPluginTest.ts

@@ -142,7 +142,7 @@ describe('EditPlugin', () => {
 
         it('Enter, normal enter not enabled', () => {
             plugin = new EditPlugin();
-            const rawEvent = { which: 13, key: 'Enter' } as any;
+            const rawEvent = { keyCode: 13, which: 13, key: 'Enter' } as any;
             const addUndoSnapshotSpy = jasmine.createSpy('addUndoSnapshot');
 
             editor.takeSnapshot = addUndoSnapshotSpy;
@@ -165,7 +165,7 @@ describe('EditPlugin', () => {
                 (featureName: string) => featureName == 'HandleEnterKey'
             );
             plugin = new EditPlugin();
-            const rawEvent = { which: 13, key: 'Enter' } as any;
+            const rawEvent = { keyCode: 13, which: 13, key: 'Enter' } as any;
             const addUndoSnapshotSpy = jasmine.createSpy('addUndoSnapshot');
 
             editor.takeSnapshot = addUndoSnapshotSpy;