键盘添加撤销操作

CustomKeyboard/KeyboardViewController.m

@@ -19,6 +19,7 @@
 #import "KBHostAppLauncher.h"
 #import "KBKeyboardSubscriptionView.h"
 #import "KBKeyboardSubscriptionProduct.h"
+#import "KBBackspaceUndoManager.h"
 
 // 提前声明一个类别，使编译器在 static 回调中识别 kb_consumePendingShopSkin 方法。
 @interface KeyboardViewController (KBSkinShopBridge)
@@ -249,6 +250,9 @@ static void KBSkinInstallNotificationCallback(CFNotificationCenterRef center,
 
 // MARK: - KBKeyBoardMainViewDelegate
 - (void)keyBoardMainView:(KBKeyBoardMainView *)keyBoardMainView didTapKey:(KBKey *)key {
+    if (key.type != KBKeyTypeShift && key.type != KBKeyTypeModeChange) {
+        [[KBBackspaceUndoManager shared] registerNonClearAction];
+    }
     switch (key.type) {
         case KBKeyTypeCharacter:
             [self.textDocumentProxy insertText:key.output ?: key.title ?: @""]; break;
@@ -285,9 +289,14 @@ static void KBSkinInstallNotificationCallback(CFNotificationCenterRef center,
 
 - (void)keyBoardMainView:(KBKeyBoardMainView *)keyBoardMainView didSelectEmoji:(NSString *)emoji {
     if (emoji.length == 0) { return; }
+    [[KBBackspaceUndoManager shared] registerNonClearAction];
     [self.textDocumentProxy insertText:emoji];
 }
 
+- (void)keyBoardMainViewDidTapUndo:(KBKeyBoardMainView *)keyBoardMainView {
+    [[KBBackspaceUndoManager shared] performUndoFromResponder:self.view];
+}
+
 - (void)keyBoardMainViewDidTapEmojiSearch:(KBKeyBoardMainView *)keyBoardMainView {
     [KBHUD showInfo:KBLocalized(@"Search coming soon")];
 }