个人博客 - 刘佳华

ANSI 转义码

发表于 分类于

WPF 文本框仿控制台做一个五彩斑斓的黑

简介

参考 维基百科 ANSI escape code 控制台程序使用 ANSI 转义来体现文字颜色，在控制台中显示出一个五彩斑斓的黑，也有很多控制台程序用这些带文字的颜色显示自家 LOGO。
WPF 想要在一行中加载不同颜色的文字，使用富文本控件 RichTextBox 即可，但是需要先解析文本中的 Ansi 字符。
完整参考代码在开源项目 EasyDeploy 中有重写富文本控件。

图片来源于网络

打印颜色板

代码
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
static void Main(string[] args)
{
    Dictionary<string, int> dicForeground = new Dictionary<string, int>()
    {
        { "Black", 30 },
        { "Red", 31 },
        { "Green", 32 },
        { "Yellow", 33 },
        { "Blue", 34 },
        { "Magenta", 35 },
        { "Cyan", 36 },
        { "White", 37 },
        { "Gray", 90 },
        { "Bright Red", 91 },
        { "Bright Green", 92 },
        { "Bright Yellow", 93 },
        { "Bright Blue", 94 },
        { "Bright Magenta", 95 },
        { "Bright Cyan", 96 },
        { "Bright White", 97 }
    };
    Dictionary<string, int> dicBackground = new Dictionary<string, int>()
    {
        { "Black", 40 },
        { "Red", 41 },
        { "Green", 42 },
        { "Yellow", 43 },
        { "Blue", 44 },
        { "Magenta", 45 },
        { "Cyan", 46 },
        { "White", 47 },
        { "Gray", 100 },
        { "Bright Red", 101 },
        { "Bright Green", 102 },
        { "Bright Yellow", 103 },
        { "Bright Blue", 104 },
        { "Bright Magenta", 105 },
        { "Bright Cyan", 106 },
        { "Bright White", 107 }
    };

    foreach (var itemForeground in dicForeground)
    {
        Console.Write($"{itemForeground.Key}{(itemForeground.Key.Length > 8 ? "\t" : "\t\t")}");
        Console.Write($"\u001b[{itemForeground.Value}m{itemForeground.Value}");
        Console.Write($"\u001b[0m ");
        foreach (var itemBackground in dicBackground)
        {
            Console.Write($"\u001b[{itemForeground.Value};{itemBackground.Value}m{itemForeground.Value};{itemBackground.Value}");
            Console.Write($"\u001b[0m ");
        }
        Console.Write($"\r\n");
    }
    Console.ReadKey();
}

解析字符

Ansi 编码由 \u001b[ 开头，加数值编码，由 m 结尾。
数值 0 为默认值。
数值 30-37;90-97 为文字颜色。
数值 40-47;100-107 为背景颜色。
通过正则表达式 \u001b[(.*?)m 匹配文本，后续的文本即为设定颜色。

代码
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
/// <summary>
/// ANSI 转义序列相关帮助类
/// </summary>
public static class AnsiHelper
{
    /// <summary>
    /// 匹配 Ansi 头
    /// </summary>
    public static char AnsiStart = '\u001b';

    /// <summary>
    /// 匹配 Ansi 正则
    /// </summary>
    public static string AnsiRegex = @"\u001b\[(.*?)m";

    /// <summary>
    /// 去除字符串中的 ANSI 序列
    /// </summary>
    /// <param name="text">包含 Ansi 的文本</param>
    /// <returns></returns>
    public static string RemoveAnsi(string text)
    {
        return Regex.Replace(text, AnsiRegex, string.Empty);
    }

    /// <summary>
    /// 获取通过正则 Ansi 拆分的数据集
    /// </summary>
    /// <param name="text">包含 Ansi 的文本</param>
    /// <returns></returns>
    public static List<string> GetAnsiSplit(string text)
    {
        List<string> listAnsiSplit = new List<string>();
        // 获取匹配 Ansi 数据
        var vMatches = Regex.Matches(text, AnsiRegex);
        // 获取 Ansi 下标
        List<int> indexs = new List<int>();
        for (int i = 0; i < text.Length; i++)
        {
            if (text[i].Equals(AnsiStart))
            {
                indexs.Add(i);
            }
        }
        // 遍历拆分数据
        if (indexs.Count == 0)
        {
            // 无颜色数据
            listAnsiSplit.Add(text);
        }
        else
        {
            // 解析颜色数据
            int iSubscript = 0;
            for (int i = 0; i < indexs.Count; i++)
            {
                if (i == 0 && indexs[i] > 0)
                {
                    // 如果大于起始位置，先把起始数据赋值
                    listAnsiSplit.Add(text.Substring(0, indexs[i]));
                    iSubscript += indexs[i];
                }
                // 添加 Ansi 数据
                listAnsiSplit.Add(vMatches[i].Value);
                iSubscript += vMatches[i].Value.Length;

                // 添加其他数据
                int iSubCount = (indexs.Count > i + 1 ? indexs[i + 1] : text.Length) - iSubscript;
                if (iSubCount > 0)
                {
                    listAnsiSplit.Add(text.Substring(iSubscript, iSubCount));
                    iSubscript += iSubCount;
                }
            }
        }
        return listAnsiSplit;
    }
}

把 Ansi 字符串解析为富文本所需的控件

通过正则表达式拆分，后创建 Run 控件来创建前景色和背景色。

代码
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
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
/// <summary>
/// 添加文本
/// </summary>
/// <param name="Text"></param>
public void SetText(string Text)
{
    // 根据最大显示行数删除
    if (this.Document.Blocks.Count >= MaxRows)
    {
        int iRempveNumber = this.Document.Blocks.Count - MaxRows;
        List<Paragraph> listRemoveTemp = new List<Paragraph>();
        foreach (var item in this.Document.Blocks)
        {
            if (iRempveNumber > 0)
            {
                iRempveNumber--;
                listRemoveTemp.Add(item as Paragraph);
            }
        }
        if (listRemoveTemp != null && listRemoveTemp.Count >= 1)
        {
            foreach (var item in listRemoveTemp)
            {
                this.Document.Blocks.Remove(item);
            }
        }
    }

    // 添加文本
    string ansiColor = null;
    Paragraph paragraph = new Paragraph();
    foreach (var item in AnsiHelper.GetAnsiSplit(Text))
    {
        if (item.Contains(AnsiHelper.AnsiStart))
        {
            // 设置颜色
            ansiColor = item;
        }
        else
        {
            paragraph.Inlines.Add(SetColorFromAnsi(new Run() { Text = item }, ansiColor));
        }
    }
    this.Document.Blocks.Add(paragraph);

    // 滚动条超过 80% 或滚动条小于一倍控件高度 滚动到底部
    if (this.VerticalOffset / (this.ExtentHeight - this.ActualHeight) >= 0.8 || (this.ExtentHeight - this.ActualHeight) <= this.ActualHeight)
    {
        this.ScrollToEnd();
    }
}

/// <summary>
/// 根据 Ansi 设置文本颜色
/// </summary>
/// <param name="run">文本</param>
/// <param name="ansiColor">ansi 颜色</param>
/// <returns></returns>
private Run SetColorFromAnsi(Run run, string ansiColor)
{
    if (string.IsNullOrEmpty(ansiColor))
    {
        return run;
    }
    var vMatches = Regex.Matches(ansiColor, AnsiHelper.AnsiRegex);
    if (vMatches != null && vMatches.Count >= 1 && vMatches[0].Groups != null && vMatches[0].Groups.Count >= 2)
    {
        var vSplit = vMatches[0].Groups[1].Value.Split(';');
        foreach (var item in vSplit)
        {
            switch (item)
            {
                // Black
                case "30": run.Foreground = new SolidColorBrush(Color.FromRgb(0, 0, 0)); break;
                case "40": run.Background = new SolidColorBrush(Color.FromRgb(0, 0, 0)); break;

                // Red
                case "31": run.Foreground = new SolidColorBrush(Color.FromRgb(128, 0, 0)); break;
                case "41": run.Background = new SolidColorBrush(Color.FromRgb(128, 0, 0)); break;

                // Green
                case "32": run.Foreground = new SolidColorBrush(Color.FromRgb(0, 128, 0)); break;
                case "42": run.Background = new SolidColorBrush(Color.FromRgb(0, 128, 0)); break;

                // Yellow
                case "33": run.Foreground = new SolidColorBrush(Color.FromRgb(128, 128, 0)); break;
                case "43": run.Background = new SolidColorBrush(Color.FromRgb(128, 128, 0)); break;

                // Blue
                case "34": run.Foreground = new SolidColorBrush(Color.FromRgb(0, 0, 128)); break;
                case "44": run.Background = new SolidColorBrush(Color.FromRgb(0, 0, 128)); break;

                // Magenta
                case "35": run.Foreground = new SolidColorBrush(Color.FromRgb(128, 0, 128)); break;
                case "45": run.Background = new SolidColorBrush(Color.FromRgb(128, 0, 128)); break;

                // Cyan
                case "36": run.Foreground = new SolidColorBrush(Color.FromRgb(0, 128, 128)); break;
                case "46": run.Background = new SolidColorBrush(Color.FromRgb(0, 128, 128)); break;

                // White
                case "37": run.Foreground = new SolidColorBrush(Color.FromRgb(192, 192, 192)); break;
                case "47": run.Background = new SolidColorBrush(Color.FromRgb(192, 192, 192)); break;

                // Bright Black (Gray)
                case "90": run.Foreground = new SolidColorBrush(Color.FromRgb(128, 128, 128)); break;
                case "100": run.Background = new SolidColorBrush(Color.FromRgb(128, 128, 128)); break;

                // Bright Red
                case "91": run.Foreground = new SolidColorBrush(Color.FromRgb(255, 0, 0)); break;
                case "101": run.Background = new SolidColorBrush(Color.FromRgb(255, 0, 0)); break;

                // Bright Green
                case "92": run.Foreground = new SolidColorBrush(Color.FromRgb(0, 255, 0)); break;
                case "102": run.Background = new SolidColorBrush(Color.FromRgb(0, 255, 0)); break;

                // Bright Yellow
                case "93": run.Foreground = new SolidColorBrush(Color.FromRgb(255, 255, 0)); break;
                case "103": run.Background = new SolidColorBrush(Color.FromRgb(255, 255, 0)); break;

                // Bright Blue
                case "94": run.Foreground = new SolidColorBrush(Color.FromRgb(0, 0, 255)); break;
                case "104": run.Background = new SolidColorBrush(Color.FromRgb(0, 0, 255)); break;

                // Bright Magenta
                case "95": run.Foreground = new SolidColorBrush(Color.FromRgb(255, 0, 255)); break;
                case "105": run.Background = new SolidColorBrush(Color.FromRgb(255, 0, 255)); break;

                // Bright Cyan
                case "96": run.Foreground = new SolidColorBrush(Color.FromRgb(0, 255, 255)); break;
                case "106": run.Background = new SolidColorBrush(Color.FromRgb(0, 255, 255)); break;

                // Bright White
                case "97": run.Foreground = new SolidColorBrush(Color.FromRgb(255, 255, 255)); break;
                case "107": run.Background = new SolidColorBrush(Color.FromRgb(255, 255, 255)); break;
                default:
                    break;
            }
        }
    }
    return run;
}

使用网站 patorjk.com/software/taag/ 生成用于控制台的艺术字

生成我注册公司的域名：Ice Elves
1
2
3
4
5
6
7
8
$$$$$$\                        $$$$$$$$\ $$\                                
\_$$  _|                       $$  _____|$$ |                               
  $$ |  $$$$$$$\  $$$$$$\      $$ |      $$ |$$\    $$\  $$$$$$\   $$$$$$$\ 
  $$ | $$  _____|$$  __$$\     $$$$$\    $$ |\$$\  $$  |$$  __$$\ $$  _____|
  $$ | $$ /      $$$$$$$$ |    $$  __|   $$ | \$$\$$  / $$$$$$$$ |\$$$$$$\  
  $$ | $$ |      $$   ____|    $$ |      $$ |  \$$$  /  $$   ____| \____$$\ 
$$$$$$\\$$$$$$$\ \$$$$$$$\     $$$$$$$$\ $$ |   \$  /   \$$$$$$$\ $$$$$$$  |
\______|\_______| \_______|    \________|\__|    \_/     \_______|\_______/