Struct HistoryManager

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pub struct HistoryManager<T: Clone> { /* private fields */ }
Expand description

历史管理器

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impl<T: Clone> HistoryManager<T>

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pub fn new(initial_state: T, history_limit: Option<usize>) -> Self

创建新的历史管理器

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pub fn with_config(initial_state: T, config: HistoryConfig) -> Self

使用配置创建历史管理器

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pub fn get_present(&self) -> T

获取当前状态

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pub fn get_history(&self) -> &History<T>

获取历史记录

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pub fn get_history_length(&self) -> usize

获取历史记录长度

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pub fn get_config(&self) -> &HistoryConfig

获取历史配置

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pub fn update_config(&mut self, config: HistoryConfig)

更新历史配置

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pub fn insert(&mut self, state: T)

插入新状态

当历史记录超出最大限制时,自动舍弃最旧的记录

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pub fn jump_to_future(&mut self, index: usize)

跳转到未来状态

§边界检查
  • 检查索引是否在有效范围内
  • 安全的数组切片操作
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pub fn jump_to_past(&mut self, index: usize)

跳转到过去状态

§边界检查
  • 检查索引是否在有效范围内
  • 安全的数组切片操作
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pub fn jump(&mut self, n: isize)

通用跳转方法

§参数
  • n: 跳转的步数
    • 负数:向过去跳转
    • 正数:向未来跳转
    • 0:不跳转
§边界检查
  • 自动限制在有效范围内
  • 超出范围的跳转会被忽略
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pub fn clear_history(&mut self)

清空历史记录

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pub fn get_past_state(&self, index: usize) -> Option<&T>

安全地获取过去状态

§边界检查
  • 返回 Option 以处理无效索引
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pub fn get_future_state(&self, index: usize) -> Option<&T>

安全地获取未来状态

§边界检查
  • 返回 Option 以处理无效索引
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pub fn can_undo(&self) -> bool

检查是否可以撤销(向过去跳转)

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pub fn can_redo(&self) -> bool

检查是否可以重做(向未来跳转)

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pub fn past_count(&self) -> usize

获取过去状态的数量

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pub fn future_count(&self) -> usize

获取未来状态的数量

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pub fn validate_integrity(&self) -> bool

验证历史记录的完整性

用于调试和测试,确保历史记录结构正确

Auto Trait Implementations§

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impl<T> Freeze for HistoryManager<T>
where T: Freeze,

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impl<T> RefUnwindSafe for HistoryManager<T>
where T: RefUnwindSafe,

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impl<T> Send for HistoryManager<T>
where T: Send,

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impl<T> Sync for HistoryManager<T>
where T: Sync,

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impl<T> Unpin for HistoryManager<T>
where T: Unpin,

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impl<T> UnwindSafe for HistoryManager<T>
where T: UnwindSafe,

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impl<T> Any for T
where T: 'static + ?Sized,

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Gets the TypeId of self. Read more
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where T: ?Sized,

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where T: ?Sized,

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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type Init = T

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Dereferences the given pointer. Read more
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