feat(Hintergrund): Erstellen, um den Hintergrund von Anmerkungen mit der Eigenschaft MarginRatio zu konfigurieren.

- verschiebt Anmerkungen nach

EnvelopeGenerator.Web/Models/Annotation/Annotation.cs

@@ -0,0 +1,82 @@
+using System.Text.Json.Serialization;
+
+namespace EnvelopeGenerator.Web.Models.Annotation;
+
+public record Annotation
+{
+    public required string Name { get; init; }
+
+    #region Bound Annotation
+    [JsonIgnore]
+    public string? HorBoundAnnotName { get; init; }
+
+    [JsonIgnore]
+    public string? VerBoundAnnotName { get; init; }
+    #endregion
+
+    #region Layout
+    [JsonIgnore]
+    public double? MarginLeft { get; set; }
+
+    [JsonIgnore]
+    public double MarginLeftRatio { get; init; } = 1;
+
+    [JsonIgnore]
+    public double? MarginTop { get; set; }
+
+    [JsonIgnore]
+    public double MarginTopRatio { get; init; } = 1;
+
+    public double? Width { get; set; }
+
+    [JsonIgnore]
+    public double WidthRatio { get; init; } = 1;
+
+    public double? Height { get; set; }
+
+    [JsonIgnore]
+    public double HeightRatio { get; init; } = 1;
+    #endregion
+
+    #region Position
+    public double Left => (MarginLeft ?? 0) + (HorBoundAnnot?.HorBoundary ?? 0);
+
+    public double Top => (MarginTop ?? 0) + (VerBoundAnnot?.VerBoundary ?? 0);
+    #endregion
+
+    #region Boundary
+    [JsonIgnore]
+    public double HorBoundary => Left + (Width ?? 0);
+
+    [JsonIgnore]
+    public double VerBoundary => Top + (Height ?? 0);
+    #endregion
+
+    #region BoundAnnot
+    [JsonIgnore]
+    public Annotation? HorBoundAnnot { get; set; }
+
+    [JsonIgnore]
+    public Annotation? VerBoundAnnot { get; set; }
+    #endregion
+
+    [JsonIgnore]
+    internal Annotation Default 
+    { 
+        set 
+        {
+            // To set null value, annotation must have null (0) value but null must has non-null value
+            if (MarginLeft == null && value.MarginLeft != null)
+                MarginLeft = value.MarginLeft * MarginLeftRatio;
+
+            if (MarginTop == null && value.MarginTop != null)
+                MarginTop = value.MarginTop * MarginTopRatio;
+
+            if (Width == null && value.Width != null)
+                Width = value.Width * WidthRatio;
+
+            if (Height == null && value.Height != null)
+                Height = value.Height * HeightRatio;
+        }
+    }
+};

EnvelopeGenerator.Web/Models/Annotation/AnnotationParams.cs

@@ -0,0 +1,64 @@
+using System.Text.Json.Serialization;
+
+namespace EnvelopeGenerator.Web.Models.Annotation;
+
+public class AnnotationParams
+{
+    public AnnotationParams()
+    {
+        _annotationDictionaryInitor = new(() => _annots.ToDictionary(a => a.Name.ToLower(), a => a));
+    }
+
+    public Background? Background { get; init; }
+
+    [JsonIgnore]
+    public Annotation? DefaultAnnotation { get; init; }
+
+    private readonly List<Annotation> _annots = new List<Annotation>();
+
+    public Annotation this[string name] => _annots.First(a => a.Name == name);
+
+    public bool TryGet(string name, out Annotation annotation)
+    {
+#pragma warning disable CS8601 // Possible null reference assignment.
+        annotation = _annots.FirstOrDefault(a => a.Name == name);
+#pragma warning restore CS8601 // Possible null reference assignment.
+        return annotation is not null;
+    }
+
+    public required IEnumerable<Annotation> Annotations
+    {
+        get => _annots;
+        init
+        {
+            _annots = value.ToList();
+
+            if (DefaultAnnotation is not null)
+                foreach (var annot in _annots)
+                    annot.Default = DefaultAnnotation;
+
+            foreach (var annot in _annots)
+            {
+                #region set bound annotations
+                // horizontal
+                if (annot.HorBoundAnnotName is string horBoundAnnotName)
+                    if (TryGet(horBoundAnnotName, out var horBoundAnnot))
+                        annot.HorBoundAnnot = horBoundAnnot;
+                    else
+                        throw new InvalidOperationException($"{horBoundAnnotName} added as bound anotation. However, it is not defined.");
+
+                // vertical
+                if (annot.VerBoundAnnotName is string verBoundAnnotName)
+                    if (TryGet(verBoundAnnotName, out var verBoundAnnot))
+                        annot.VerBoundAnnot = verBoundAnnot;
+                    else
+                        throw new InvalidOperationException($"{verBoundAnnotName} added as bound anotation. However, it is not defined.");
+                #endregion
+            }
+        }
+    }
+
+    private readonly Lazy<Dictionary<string, Annotation>> _annotationDictionaryInitor;
+
+    public Dictionary<string, Annotation> AnnotationDictionary => _annotationDictionaryInitor.Value;
+}

EnvelopeGenerator.Web/Models/Annotation/Background.cs

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+namespace EnvelopeGenerator.Web.Models.Annotation;
+
+public class Background
+{
+    public int Margin { get; init; }
+}