Struct Transaction

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pub struct Transaction {
    pub meta: GenericHashMap<String, Arc<dyn Any>, RandomState, ArcK>,
    pub id: u64,
    /* private fields */
}
Expand description

事务结构体,用于管理文档的修改操作

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§meta: GenericHashMap<String, Arc<dyn Any>, RandomState, ArcK>

存储元数据的哈希表,支持任意类型数据

§id: u64

事务的时间戳

Implementations§

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impl Transaction

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pub fn new(state: &State) -> Transaction

创建新的事务实例 state: 当前状态对象 返回: Transaction 实例

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pub fn merge(&mut self, other: &mut Transaction)

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pub fn doc(&self) -> Arc<NodePool>

获取当前文档状态

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pub fn set_node_attribute( &mut self, id: String, values: GenericHashMap<String, Value, RandomState, ArcK>, ) -> Result<(), Error>

设置节点属性 id: 节点ID values: 属性键值对

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pub fn add_node( &mut self, parent_id: String, nodes: Vec<NodeEnum>, ) -> Result<(), Error>

添加新节点 parent_id: 父节点ID node: 要添加的节点

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pub fn remove_node( &mut self, parent_id: String, node_ids: Vec<String>, ) -> Result<(), Error>

删除节点 id: 节点ID nodes: 要删除的节点

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pub fn add_mark(&mut self, id: String, marks: Vec<Mark>) -> Result<(), Error>

添加标记 id: 节点ID marks: 要添加的标记

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pub fn remove_mark( &mut self, id: String, mark_types: Vec<String>, ) -> Result<(), Error>

删除标记 id: 节点ID marks: 要删除的标记

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pub fn set_meta<K, T>(&mut self, key: K, value: T) -> &mut Transaction
where T: 'static, K: Into<String>,

设置元数据 key: 键 value: 值(支持任意类型)

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pub fn get_meta<T>(&self, key: &str) -> Option<T>
where T: Clone + 'static,

获取元数据 key: 键 返回: Option<&T>,如果存在且类型匹配则返回Some,否则返回None

Methods from Deref<Target = Transform>§

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pub fn doc(&self) -> Arc<NodePool>

获取当前文档状态,使用延迟计算

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pub fn step(&mut self, step: Arc<dyn Step>) -> Result<(), Error>

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pub fn doc_changed(&self) -> bool

检查文档是否被修改

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pub fn apply_steps_batch( &mut self, steps: Vec<Arc<dyn Step>>, ) -> Result<(), Error>

批量应用步骤(优化版本)

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pub fn commit(&mut self)

提交更改,将当前状态设为新的基础状态 保留历史记录(steps 和 invert_steps)以支持回滚功能

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pub fn rollback(&mut self)

回滚所有未提交的更改

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pub fn rollback_steps(&mut self, count: usize) -> Result<(), Error>

回滚指定数量的步骤

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pub fn clear_history(&mut self)

清除历史记录(释放内存)

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pub fn history_size(&self) -> usize

获取历史记录大小

Trait Implementations§

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impl Clone for Transaction

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fn clone(&self) -> Transaction

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Transaction

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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
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impl Deref for Transaction

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type Target = Transform

The resulting type after dereferencing.
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fn deref(&self) -> &<Transaction as Deref>::Target

Dereferences the value.
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impl DerefMut for Transaction

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fn deref_mut(&mut self) -> &mut <Transaction as Deref>::Target

Mutably dereferences the value.
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impl Send for Transaction

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impl Sync for Transaction

Auto Trait Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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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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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> Pointable for T

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const ALIGN: usize

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<P, T> Receiver for P
where P: Deref<Target = T> + ?Sized, T: ?Sized,

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type Target = T

🔬This is a nightly-only experimental API. (arbitrary_self_types)
The target type on which the method may be called.
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more