scribe 0.4.2

Text editor toolkit.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

use buffer::Buffer;
pub use self::group::OperationGroup;

pub mod group;
pub mod history;

/// A reversible buffer operation.
///
/// Operations are an internal way of encapsulating an action on a buffer
/// that can be run and reversed. They're directly tied to scribe's history
/// functionality, which uses the trait's methods to run and reverse these.
///
/// Types that implement this trait are responsible for adding methods to the
/// Buffer type to expose their functionality; these should build, run, and
/// add the operation objects to the buffer history.
pub trait Operation {
    fn run(&mut self, &mut Buffer);
    fn reverse(&mut self, &mut Buffer);
    fn clone_operation(&self) -> Box<Operation>;
}