Struct TextEditCommand

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pub struct TextEditCommand {
    pub name: &'static str,
    pub before: TextEditState,
    pub after: TextEditState,
    pub target: Rc<RefCell<TextEditState>>,
}

Expand description

Stores before/after snapshots of TextEditState and a shared reference to the live state so that undo/redo can restore it.

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§name: &'static str§before: TextEditState§after: TextEditState§target: Rc<RefCell<TextEditState>>

Trait Implementations§

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impl UndoRedoCommand for TextEditCommand

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fn name(&self) -> &str

Short human-readable description, e.g. "insert text".

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fn do_it(&mut self)

Re-apply the operation (called on Redo).

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fn undo_it(&mut self)

Reverse the operation (called on Undo).

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fn as_any_mut(&mut self) -> &mut dyn Any

Downcast hook for in-stroke coalescing. Implementors forward self; the predicate passed to UndoBuffer::try_coalesce_last runs cmd.as_any_mut().downcast_mut::<ConcreteType>() to inspect the top of the stack.

Auto Trait Implementations§

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impl UnsafeUnpin for TextEditCommand

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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> Downcast for T
where T: Any,

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fn into_any(self: Box<T>) -> Box<dyn Any>

Converts Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>, which can then be downcast into Box<dyn ConcreteType> where ConcreteType implements Trait.

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fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>

Converts Rc<Trait> (where Trait: Downcast) to Rc<Any>, which can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait.

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fn as_any(&self) -> &(dyn Any + 'static)

Converts &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.

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fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Converts &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s.

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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, U> Into 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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