BadDebuggerStep.cs

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using System.Text;
 
using BadScript2.Common;
using BadScript2.Runtime;
using BadScript2.Utility;
 
namespace BadScript2.Debugging;
 
public readonly struct BadDebuggerStep : IEquatable<BadDebuggerStep>
{
    public readonly object? StepSource;
 
    public readonly BadExecutionContext Context;
 
    public readonly BadSourcePosition Position;
 
    public BadDebuggerStep(BadExecutionContext context, BadSourcePosition position, object? stepSource)
    {
        Context = context;
        Position = position;
        StepSource = stepSource;
    }
 
    public string GetInfo()
    {
        return
            $"######################################\nDebug Step at {Position.GetPositionInfo()}\n\nStepSource: {StepSource}\n\nContext: {Context.Scope.Name}: {Context.Scope}\n\n######################################\n";
    }
 
 
    public string GetSourceView(int[] breakpoints, out int topInSource, out int lineInSource, int lineDelta = 4)
    {
        return GetSourceView(lineDelta, lineDelta, breakpoints, out topInSource, out lineInSource);
    }
 
 
    public string GetSourceView(int top, int bottom, int[] breakpoints, out int topInSource, out int lineInSource)
    {
        StringBuilder sb = new StringBuilder($"File: {Position.FileName}\n");
        string[] lines = GetLines(top, bottom, out topInSource, out lineInSource);
 
        for (int i = 0; i < lines.Length; i++)
        {
            int ln = topInSource + i;
            string line = lines[i];
            string prefix = ln.ToString();
 
            if (ln == lineInSource)
            {
                prefix = ">>";
            }
            else
            {
                if (breakpoints.Any(breakpoint => ln == breakpoint))
                {
                    prefix = "@";
                }
            }
 
            sb.AppendLine($"{prefix}\t| {line}");
        }
 
        return sb.ToString();
    }
 
    public override string ToString()
    {
        return GetInfo();
    }
 
    public string[] GetLines(int top, int bottom, out int topInSource, out int lineInSource)
    {
        lineInSource = 1;
 
        for (int i = 0; i < Position.Index; i++)
        {
            if (Position.Source[i] == '\n')
            {
                lineInSource++;
            }
        }
 
        topInSource = Math.Max(1, lineInSource - top);
 
        string[] lines = Position.Source.Split('\n');
 
        List<string> lns = new List<string>();
 
        for (int i = topInSource - 1;
             i < topInSource - 1 + Math.Min(top + bottom, lines.Length - (topInSource - 1));
             i++)
        {
            lns.Add(lines[i]);
        }
 
        return lns.ToArray();
    }
 
    public bool Equals(BadDebuggerStep other)
    {
        return Equals(StepSource, other.StepSource) && Context.Equals(other.Context) && Position.Equals(other.Position);
    }
 
    public override bool Equals(object? obj)
    {
        return obj is BadDebuggerStep other && Equals(other);
    }
 
    public override int GetHashCode()
    {
        return BadHashCode.Combine(StepSource, Context, Position);
    }
 
    public static bool operator ==(BadDebuggerStep left, BadDebuggerStep right)
    {
        return left.Equals(right);
    }
 
    public static bool operator !=(BadDebuggerStep left, BadDebuggerStep right)
    {
        return !left.Equals(right);
    }
}