syntax-highlighting - 以编程方式向 AvalonEdit 添加语法高亮规则

Question

我在运行我自己的定制语言的应用程序中使用 AvalonEdit。我想在 Avalon Edit 中加入适当的语法高亮。通常这是通过在 xml 文件中手动定义突出显示规则来完成的。

但是，我不希望在我扩展语言时突出显示规则总是与语言语法不同步。所以我希望使用我的 coco/R 解析器中已经包含的语法信息来自动生成这些规则。
那么有没有办法以编程方式向 Avalon Edit 添加语法高亮规则？

谢谢

Answer 1

下面的代码至少对我有用。

Assembly assembly = Assembly.GetExecutingAssembly();
using (Stream s = assembly.GetManifestResourceStream("Your.xshd"))
{
    using (XmlTextReader reader = new XmlTextReader(s))
    {
        //Load default Syntax Highlighting
        InternalEditor.SyntaxHighlighting = HighlightingLoader.Load(reader, HighlightingManager.Instance);

        // Dynamic syntax highlighting for your own purpose
        var rules = InternalEditor.SyntaxHighlighting.MainRuleSet.Rules;

        _HighlightingRule = new HighlightingRule();
        _HighlightingRule.Color = new HighlightingColor()
        {
                Foreground = new CustomizedBrush(SomeColor)
        };

        String[] wordList = PseudoGetKeywords(); // Your own logic
        String regex = String.Format(@"\b({0})\w*\b", String.Join("|", wordList));
        _HighlightingRule.Regex = new Regex(regex);

        rules.Add(_HighlightingRule);
    }
}


internal sealed class CustomizedBrush : HighlightingBrush
{
    private readonly SolidColorBrush brush; 
    public CustomizedBrush(Color color)
    {
        brush = CreateFrozenBrush(color);
    }

    public CustomizedBrush(System.Drawing.Color c)
    {
        var c2 = System.Windows.Media.Color.FromArgb(c.A, c.R, c.G, c.B);        
        brush = CreateFrozenBrush(c2);
    }

    public override Brush GetBrush(ITextRunConstructionContext context)
    {
        return brush;
    }

    public override string ToString()
    {
        return brush.ToString();
    }

    private static SolidColorBrush CreateFrozenBrush(Color color)
    {
        SolidColorBrush brush = new SolidColorBrush(color);
        brush.Freeze();
        return brush;
    }
}