Add UI Value Validators

Data/DoubleInputValidator.cs

@@ -0,0 +1,98 @@
+using System.Collections.Generic;
+using MelonLoader;
+using UnityEngine.UIElements;
+
+namespace ADOFAIRenderer.Data
+{
+    public class DoubleInputValidator
+    {
+        private struct FieldEntry
+        {
+            public List<DoubleLimit> Limits;
+            public bool Optional;
+        }
+
+        private readonly VisualElement _rootVisualElement;
+        private readonly Dictionary<string, FieldEntry> _fields = new();
+
+        public DoubleInputValidator(VisualElement rootVisualElement)
+        {
+            _rootVisualElement = rootVisualElement;
+        }
+
+        /// <summary>
+        /// Registers one or more <see cref="DoubleLimit"/>s for the field with the given name.
+        /// Multiple limits can be added to the same field — they are all checked in order.
+        /// </summary>
+        /// <param name="fieldName">The name of the DoubleField in the UXML.</param>
+        /// <param name="optional">
+        /// If true, the field is allowed to be empty. Limits are only enforced when a value is present.
+        /// </param>
+        /// <param name="limits">The limits to apply.</param>
+        public DoubleInputValidator AddLimits(string fieldName, bool optional, params DoubleLimit[] limits)
+        {
+            if (!_fields.TryGetValue(fieldName, out var entry))
+            {
+                entry = new FieldEntry
+                {
+                    Limits = new List<DoubleLimit>(),
+                    Optional = optional
+                };
+            }
+
+            entry.Optional = optional;
+            entry.Limits.AddRange(limits);
+            _fields[fieldName] = entry;
+            return this;
+        }
+
+        /// <inheritdoc cref="AddLimits(string, bool, DoubleLimit[])"/>
+        /// <remarks>Shorthand for required (non-optional) fields.</remarks>
+        public DoubleInputValidator AddLimits(string fieldName, params DoubleLimit[] limits)
+        {
+            return AddLimits(fieldName, false, limits);
+        }
+
+        /// <summary>
+        /// Queries all registered fields from the root VisualElement and
+        /// registers value-changed callbacks that rollback invalid values.
+        /// </summary>
+        public void SetupValidation()
+        {
+            foreach (var kvp in _fields)
+            {
+                var fieldName = kvp.Key;
+                var entry = kvp.Value;
+
+                var field = _rootVisualElement.Q<DoubleField>(fieldName);
+                if (field == null)
+                {
+                    Melon<RenderMod>.Logger.Warning(
+                        $"DoubleField '{fieldName}'을(를) 찾을 수 없습니다. 유효성 검사를 건너뜁니다.");
+                    continue;
+                }
+
+                var limits = entry.Limits;
+                var optional = entry.Optional;
+
+                field.RegisterValueChangedCallback(evt =>
+                {
+                    // Optional fields allow empty input — skip validation when cleared
+                    if (optional && string.IsNullOrEmpty(field.text))
+                    {
+                        return;
+                    }
+
+                    foreach (var limit in limits)
+                    {
+                        if (!limit.Validate(evt.newValue, out _))
+                        {
+                            field.SetValueWithoutNotify(evt.previousValue);
+                            return;
+                        }
+                    }
+                });
+            }
+        }
+    }
+}