-
-
Notifications
You must be signed in to change notification settings - Fork 255
/
RemoveEnumMemberValueRefactoring.cs
117 lines (92 loc) · 3.88 KB
/
RemoveEnumMemberValueRefactoring.cs
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
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
// Copyright (c) .NET Foundation and Contributors. Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.CodeAnalysis.Text;
namespace Roslynator.CSharp.Refactorings;
internal static class RemoveEnumMemberValueRefactoring
{
public static void ComputeRefactoring(
RefactoringContext context,
EnumDeclarationSyntax enumDeclaration,
SeparatedSyntaxListSelection<EnumMemberDeclarationSyntax> selectedMembers)
{
int count = 0;
for (int i = 0; i < selectedMembers.Count; i++)
{
if (selectedMembers[i].EqualsValue?.Value is not null)
{
count++;
if (count == 2)
break;
}
}
if (count == 0)
return;
context.RegisterRefactoring(
(count == 1) ? "Remove enum value" : "Remove enum values",
ct => RefactorAsync(context.Document, enumDeclaration, selectedMembers, keepCompositeValue: false, ct),
RefactoringDescriptors.RemoveEnumMemberValue);
}
public static void ComputeRefactoring(
RefactoringContext context,
EnumDeclarationSyntax enumDeclaration)
{
int count = 0;
SeparatedSyntaxList<EnumMemberDeclarationSyntax> members = enumDeclaration.Members;
for (int i = 0; i < members.Count; i++)
{
if (members[i].EqualsValue?.Value is not null)
{
count++;
if (count == 2)
break;
}
}
if (count == 0)
return;
context.RegisterRefactoring(
(count == 1) ? "Remove explicit value" : "Remove explicit values",
ct => RefactorAsync(context.Document, enumDeclaration, members, keepCompositeValue: true, ct),
RefactoringDescriptors.RemoveEnumMemberValue);
}
private static async Task<Document> RefactorAsync(
Document document,
EnumDeclarationSyntax enumDeclaration,
IEnumerable<EnumMemberDeclarationSyntax> enumMembers,
bool keepCompositeValue,
CancellationToken cancellationToken)
{
SemanticModel semanticModel = null;
if (keepCompositeValue)
{
semanticModel = await document.GetSemanticModelAsync(cancellationToken).ConfigureAwait(false);
INamedTypeSymbol enumSymbol = semanticModel.GetDeclaredSymbol(enumDeclaration, cancellationToken);
keepCompositeValue = enumSymbol.HasAttribute(MetadataNames.System_FlagsAttribute);
}
IEnumerable<TextChange> textChanges = enumMembers
.Where(enumMember =>
{
ExpressionSyntax expression = enumMember.EqualsValue?.Value;
if (expression is null)
return false;
if (keepCompositeValue
&& expression is not LiteralExpressionSyntax)
{
IFieldSymbol fieldSymbol = semanticModel.GetDeclaredSymbol(enumMember, cancellationToken);
if (!fieldSymbol.HasConstantValue)
return false;
ulong value = SymbolUtility.GetEnumValueAsUInt64(fieldSymbol.ConstantValue, fieldSymbol.ContainingType);
if (FlagsUtility<ulong>.Instance.IsComposite(value))
return false;
}
return true;
})
.Select(f => new TextChange(TextSpan.FromBounds(f.Identifier.Span.End, f.EqualsValue.Span.End), ""));
return await document.WithTextChangesAsync(textChanges, cancellationToken).ConfigureAwait(false);
}
}