@joebigelow / wix-1
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1 // Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
2
3 namespace WixToolset.Core.Preprocess
4 {
5 /// <summary>
6 /// Context for an if statement in the preprocessor.
7 /// </summary>
8 internal class IfContext
9 {
10 private bool keep;
11
12 /// <summary>
13 /// Creates a default if context object, which are used for if's within an inactive preprocessor block
14 /// </summary>
15 public IfContext()
16 {
17 this.WasEverTrue = true;
18 this.IfState = IfState.If;
19 }
20
21 /// <summary>
22 /// Creates an if context object.
23 /// </summary>
24 /// <param name="active">Flag if context is currently active.</param>
25 /// <param name="keep">Flag if context is currently true.</param>
26 /// <param name="state">State of context to start in.</param>
27 public IfContext(bool active, bool keep, IfState state)
28 {
29 this.Active = active;
30 this.keep = keep;
31 this.WasEverTrue = keep;
32 this.IfState = IfState.If;
33 }
34
35 /// <summary>
36 /// Gets and sets if this if context is currently active.
37 /// </summary>
38 /// <value>true if context is active.</value>
39 public bool Active { get; set; }
40
41 /// <summary>
42 /// Gets and sets if context is current true.
43 /// </summary>
44 /// <value>true if context is currently true.</value>
45 public bool IsTrue
46 {
47 get
48 {
49 return this.keep;
50 }
51
52 set
53 {
54 this.keep = value;
55 if (this.keep)
56 {
57 this.WasEverTrue = true;
58 }
59 }
60 }
61
62 /// <summary>
63 /// Gets if the context was ever true.
64 /// </summary>
65 /// <value>True if context was ever true.</value>
66 public bool WasEverTrue { get; private set; }
67
68 /// <summary>
69 /// Gets the current state of the if context.
70 /// </summary>
71 /// <value>Current state of context.</value>
72 public IfState IfState { get; set; }
73 }
74 }