blob: f500e0090e499420f14c76350914e6dc32ad0e95 (
plain)
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
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
//
// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License. See License.txt in the project root for license information.
//
namespace Microsoft.VisualStudio.Text.Operations
{
/// <summary>
/// Holds the state of the transaction.
/// </summary>
/// <remarks>
/// There are five rough groups of transactions.
/// Open transactions are being defined. Canceled transactions have been aborted and are empty. Completed and undone
/// transactions have been defined and are ready for undo and redo, respectively. Undoing and redoing are
/// transient states as the transaction passes between completed and undone. Invalid is a state for transactions that
/// have expired.
/// </remarks>
public enum UndoTransactionState
{
/// <summary>
/// Represents the initial state of the transaction, after it has been created and before it is canceled or completed.
/// </summary>
Open,
/// <summary>
/// Indicates that the transaction is no longer being defined, and is eligible for undo.
/// </summary>
Completed,
/// <summary>
/// Indicates that the transaction is no longer being defined, but has been aborted and cleared.
/// </summary>
Canceled,
/// <summary>
/// Indicates a transient state set by Do(), between the undone state and the completed state.
/// </summary>
Redoing,
/// <summary>
/// Indicates a transient state set by Undo(), between the completed state and the Undone state.
/// </summary>
Undoing,
/// <summary>
/// Indicates that Undo() was called after completion.
/// </summary>
Undone,
/// <summary>
/// Indicates that the transaction has been removed the undo history stack, for example because it was on the redo stack when
/// a new operation cleared the redo stack. Once a transaction is invalid it should not be used for anything.
/// </summary>
Invalid
}
}
|
