blob: 7b09dc7792d632011ecb999bd35a1137a4261482 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2003-2010, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
package scala.collection
package mutable
/** A revertible history is a `History` object which supports
* an undo operation. Type variable `Evt` refers to the type
* of the published events, `Pub` denotes the publisher type.
* Type `Pub` is typically a subtype of `Publisher`.
*
* @tparam Evt type of the events
* @tparam Pub type of the publisher
*
* @author Matthias Zenger
* @version 1.0, 08/07/2003
* @since 2.8
*/
class RevertibleHistory[Evt <: Undoable, Pub] extends History[Evt, Pub] with Undoable with Serializable {
/** Rollback the full history.
*/
def undo: Unit = {
val old = log.toList.reverse
clear
old.foreach { case (sub, event) => event.undo }
}
}
|