2025-12-19 19:21:08 +08:00
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//
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// KBBackspaceUndoManager.h
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// CustomKeyboard
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//
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#import <UIKit/UIKit.h>
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NS_ASSUME_NONNULL_BEGIN
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extern NSNotificationName const KBBackspaceUndoStateDidChangeNotification;
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@interface KBBackspaceUndoManager : NSObject
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@property (nonatomic, readonly) BOOL hasUndo;
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+ (instancetype)shared;
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2025-12-23 18:05:01 +08:00
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/// 记录一次删除前的快照（不改变撤销按钮显示）。
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- (void)recordDeletionSnapshotBefore:(NSString *)before after:(NSString *)after;
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/// 记录一次“立刻清空”删除的内容（基于 documentContextBeforeInput/AfterInput）。
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- (void)recordClearWithContextBefore:(NSString *)before after:(NSString *)after;
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2025-12-19 19:21:08 +08:00
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/// 在指定 responder 处执行撤销（向光标处插回删除的内容）
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- (void)performUndoFromResponder:(UIResponder *)responder;
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2025-12-23 18:05:01 +08:00
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/// 非删除行为触发时，清理撤销状态
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2025-12-19 19:21:08 +08:00
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- (void)registerNonClearAction;
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@end
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NS_ASSUME_NONNULL_END
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