added code from unity

Runtime/PopupContentBuilder.cs

@@ -0,0 +1,115 @@
+using TMPro;
+using UnityEngine;
+using UnityEngine.UI;
+
+namespace Jovian.PopupSystem {
+    /// <summary>
+    /// Fluent API struct for building popup content. Operates on the generic element cache
+    /// inside a <see cref="PopupView"/>. Received in the build callback passed to
+    /// <see cref="IPopupSystem.Show"/>. Use <see cref="Add"/> for fully custom elements,
+    /// or convenience methods for common types.
+    /// </summary>
+    public readonly struct PopupContentBuilder {
+        readonly PopupView view;
+
+        /// <summary>
+        /// Creates a builder targeting the given popup view.
+        /// </summary>
+        public PopupContentBuilder(PopupView view) {
+            this.view = view;
+        }
+
+        /// <summary>
+        /// Returns a cached or newly instantiated element by its registered type.
+        /// Use this for fully custom or game-specific element types.
+        /// </summary>
+        public GameObject Add(PopupElementType elementType) {
+            return view.GetElement(elementType);
+        }
+
+        /// <summary>
+        /// Adds a text element using the given element type and sets its TMP_Text content.
+        /// </summary>
+        public PopupContentBuilder AddText(string text, PopupElementType elementType) {
+            var go = view.GetElement(elementType);
+            if(go == null) {
+                return this;
+            }
+            var tmp = go.GetComponentInChildren<TMP_Text>();
+            if(tmp) {
+                tmp.text = text;
+            }
+            return this;
+        }
+
+        /// <summary>
+        /// Adds a colored text element using the given element type.
+        /// Hex color can be with or without the # prefix.
+        /// </summary>
+        public PopupContentBuilder AddText(string text, string hexColor, PopupElementType elementType) {
+            var go = view.GetElement(elementType);
+            if(!go) {
+                return this;
+            }
+            var tmp = go.GetComponentInChildren<TMP_Text>();
+            if(!tmp) {
+                return this;
+            }
+            var prefix = hexColor.Length > 0 && hexColor[0] == '#' ? "" : "#";
+            tmp.text = $"<color={prefix}{hexColor}>{text}</color>";
+            return this;
+        }
+
+        /// <summary>
+        /// Adds a name/value row using the given element type. The prefab must have
+        /// exactly two TMP_Text children (label first, value second).
+        /// </summary>
+        public PopupContentBuilder AddNameValue(string label, int value, PopupElementType elementType) {
+            return AddNameValueInternal(elementType, label, value.ToString());
+        }
+
+        /// <summary>
+        /// Adds a name/value row using the given element type. The prefab must have
+        /// exactly two TMP_Text children (label first, value second).
+        /// </summary>
+        public PopupContentBuilder AddNameValue(string label, string value, PopupElementType elementType) {
+            return AddNameValueInternal(elementType, label, value);
+        }
+
+        private PopupContentBuilder AddNameValueInternal(PopupElementType elementType, string label, string value) {
+            var go = view.GetElement(elementType);
+            if(go != null) {
+                var children = go.GetComponentsInChildren<TMP_Text>(true);
+                if(children.Length >= 2) {
+                    children[0].text = label;
+                    children[1].text = value;
+                }
+            }
+            return this;
+        }
+
+        /// <summary>
+        /// Adds an image element with the given sprite and optional height.
+        /// </summary>
+        public PopupContentBuilder AddImage(Sprite sprite, PopupElementType elementType, float height = 64f) {
+            var go = view.GetElement(elementType);
+            if(go != null) {
+                var image = go.GetComponentInChildren<Image>();
+                if(image != null) {
+                    image.sprite = sprite;
+                    var rt = (RectTransform)image.transform;
+                    rt.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, height);
+                }
+            }
+            return this;
+        }
+
+        /// <summary>
+        /// Adds a separator element using the given element type.
+        /// </summary>
+        public PopupContentBuilder AddSeparator(PopupElementType elementType) {
+            view.GetElement(elementType);
+            return this;
+        }
+    }
+}