功能更新

Melskin/Converters/Internal/StringToCodeConverter.cs

@@ -0,0 +1,73 @@
+using System.Globalization;
+using System.Text.RegularExpressions;
+using System.Windows.Data;
+using System.Windows.Documents;
+
+namespace Melskin.Converters.Internal;
+
+/// <summary>
+/// StringToCodeConverter 类实现了 IValueConverter 接口，用于将字符串转换为具有代码样式的 RichTextBox 控件。该类提供了一个静态实例 Instance，用于在 XAML 中方便地引用。
+/// 通过 Convert 方法，可以将输入的字符串转换为富文本格式，并且会对字符串中的特殊字符（如引号、尖括号等）进行高亮显示。ConvertBack 方法返回 DependencyProperty.UnsetValue，表示不支持反向转换。
+/// </summary>
+internal class StringToCodeConverter : IValueConverter
+{
+    //显式静态构造函数告诉c#编译器
+    //不将type标记为beforefieldinit
+    static StringToCodeConverter()
+    {
+    }
+
+    private StringToCodeConverter()
+    {
+    }
+
+    /// <summary>
+    /// 
+    /// </summary>
+    public static StringToCodeConverter Instance { get; } = new();
+
+    /// <inheritdoc />
+    public object Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        var str = value as string;
+        var textBox = new RichTextBox()
+        {
+            IsReadOnly = true,
+            FontSize = 12,
+            Foreground = Brushes.Red,
+            BorderThickness = new Thickness(0),
+        };
+
+        if (string.IsNullOrEmpty(str)) return textBox;
+        const string pattern = "=\".*?\"|[</>]";
+        var index = 0;
+
+        var document = new FlowDocument();
+        var paragraph = new Paragraph();
+        var inlines = paragraph.Inlines;
+        str = str?.Replace(@"\n", Environment.NewLine).Replace(@"\t", "\t");
+
+        if (str != null)
+        {
+            foreach (Match match in Regex.Matches(str, pattern))
+            {
+                inlines.Add(str.Substring(index, match.Index - index));
+                inlines.Add(new Run(match.Value) { Foreground = Brushes.Blue });
+                index = match.Index + match.Length;
+            }
+
+            inlines.Add(str.Substring(index));
+        }
+
+        document.Blocks.Add(paragraph);
+        textBox.Document = document;
+
+        return textBox;
+    }
+
+    /// <inheritdoc />
+    public object ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        return DependencyProperty.UnsetValue;
+    }
+}