From 7b44075ac89f85e447a088180878b5d7414a5c82 Mon Sep 17 00:00:00 2001
From: Wiktor Kocielski <withaust@gmail.com>
Date: Fri, 4 Aug 2023 09:59:45 +0300
Subject: [PATCH] Add recursive methods for layers

---
 Source/Engine/Level/Actor.cpp | 24 ++++++++++++++++++++++++
 Source/Engine/Level/Actor.h   | 11 +++++++++++
 2 files changed, 35 insertions(+)

diff --git a/Source/Engine/Level/Actor.cpp b/Source/Engine/Level/Actor.cpp
index 8185f3b9d..a0aa01cba 100644
--- a/Source/Engine/Level/Actor.cpp
+++ b/Source/Engine/Level/Actor.cpp
@@ -456,6 +456,19 @@ void Actor::SetLayerName(const StringView& value)
     LOG(Warning, "Unknown layer name '{0}'", value);
 }
 
+void Actor::SetLayerNameRecursive(const StringView& value)
+{
+    for (int32 i = 0; i < 32; i++)
+    {
+        if (Level::Layers[i] == value)
+        {
+            SetLayerRecursive(i);
+            return;
+        }
+    }
+    LOG(Warning, "Unknown layer name '{0}'", value);
+}
+
 bool Actor::HasTag() const
 {
     return Tags.Count() != 0;
@@ -500,6 +513,17 @@ void Actor::SetLayer(int32 layerIndex)
     OnLayerChanged();
 }
 
+void Actor::SetLayerRecursive(int32 layerIndex)
+{
+    layerIndex = Math::Clamp(layerIndex, 0, 31);
+    for (const auto& child : Children)
+        child->SetLayerRecursive(layerIndex);
+    if (layerIndex == _layer)
+        return;
+    _layer = layerIndex;
+    OnLayerChanged();
+}
+
 void Actor::SetName(const StringView& value)
 {
     if (_name == value)
diff --git a/Source/Engine/Level/Actor.h b/Source/Engine/Level/Actor.h
index 510bc9eb8..7a75b12f7 100644
--- a/Source/Engine/Level/Actor.h
+++ b/Source/Engine/Level/Actor.h
@@ -102,6 +102,12 @@ public:
     /// <param name="layerIndex">The index of the layer.</param>
     API_PROPERTY() void SetLayer(int32 layerIndex);
 
+    /// <summary>
+    /// Sets the layer recursively for all underlying children.
+    /// </summary>
+    /// <param name="layerIndex">The index of the layer.</param>
+    API_FUNCTION() void SetLayerRecursive(int32 layerIndex);
+
     /// <summary>
     /// Gets the name of the layer.
     /// </summary>
@@ -113,6 +119,11 @@ public:
     /// </summary>
     API_PROPERTY() void SetLayerName(const StringView& value);
 
+    /// <summary>
+    /// Sets the name of the layer recursively for all underlying children.
+    /// </summary>
+    API_FUNCTION() void SetLayerNameRecursive(const StringView& value);
+
     /// <summary>
     /// Determines whether this actor has any tag assigned.
     /// </summary>