Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Indentation/CSharp/CSharpIndentationHelper.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
118
119
120
121
122
123
124

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Tango.Scripting.Editors.Indentation.CSharp
{
    class CSharpIndentationHelper
    {
        public static string IndentCSharpCode(string code)
        {
            const string INDENT_STEP = "\t";

            if (string.IsNullOrWhiteSpace(code))
            {
                return code;
            }

            var result = new StringBuilder();
            var indent = string.Empty;
            var lineContent = false;
            var stringDefinition = false;

            for (var i = 0; i < code.Length; i++)
            {
                var ch = code[i];

                if (ch == '"' && !stringDefinition)
                {
                    result.Append(ch);
                    stringDefinition = true;
                    continue;
                }

                if (ch == '"' && stringDefinition)
                {
                    result.Append(ch);
                    stringDefinition = false;
                    continue;
                }

                if (stringDefinition)
                {
                    result.Append(ch);
                    continue;
                }

                if (ch == '{' && !stringDefinition)
                {
                    if (lineContent)
                    {
                        result.AppendLine();
                    }

                    result.Append(indent).Append("{");

                    if (lineContent)
                    {
                        result.AppendLine();
                    }

                    indent += INDENT_STEP;
                    lineContent = false;

                    continue;
                }

                if (ch == '}' && !stringDefinition)
                {
                    if (indent.Length != 0)
                    {
                        indent = indent.Substring(0, indent.Length - INDENT_STEP.Length);
                    }

                    if (lineContent)
                    {
                        result.AppendLine();
                    }

                    result.Append(indent).Append("}");

                    if (lineContent)
                    {
                        result.AppendLine();
                    }


                    lineContent = false;

                    continue;
                }

                if (ch == '\r')
                {
                    continue;
                }

                if ((ch == ' ' || ch == '\t') && !lineContent)
                {
                    continue;
                }

                if (ch == '\n')
                {
                    lineContent = false;
                    result.AppendLine();

                    continue;
                }

                if (!lineContent)
                {
                    result.Append(indent);
                    lineContent = true;
                }

                result.Append(ch);
            }

            return result.ToString();
        }
    }
}