Refactor new scene tree double click feature to support both prefab and scene editing

#1502

Source/Editor/Options/InputBinding.cs

@@ -8,6 +8,7 @@ using FlaxEditor.CustomEditors;
 using FlaxEditor.CustomEditors.Elements;
 using FlaxEngine;
 using FlaxEngine.GUI;
+using static FlaxEditor.Viewport.EditorViewport;
 
 namespace FlaxEditor.Options
 {
@@ -18,7 +19,7 @@ namespace FlaxEditor.Options
     [HideInEditor]
     [TypeConverter(typeof(InputBindingConverter))]
     [CustomEditor(typeof(InputBindingEditor))]
-    public struct InputBinding
+    public struct InputBinding : IEquatable<InputBinding>
     {
         /// <summary>
         /// The key to bind.
@@ -251,6 +252,40 @@ namespace FlaxEditor.Options
             }
             return result;
         }
+
+        /// <inheritdoc />
+        public bool Equals(InputBinding other)
+        {
+            return Key == other.Key && Modifier1 == other.Modifier1 && Modifier2 == other.Modifier2;
+        }
+
+        /// <inheritdoc />
+        public override bool Equals(object obj)
+        {
+            return obj is InputBinding other && Equals(other);
+        }
+
+        /// <inheritdoc />
+        public override int GetHashCode()
+        {
+            return HashCode.Combine((int)Key, (int)Modifier1, (int)Modifier2);
+        }
+
+        /// <summary>
+        /// Compares two values.
+        /// </summary>
+        public static bool operator ==(InputBinding left, InputBinding right)
+        {
+            return left.Equals(right);
+        }
+
+        /// <summary>
+        /// Compares two values.
+        /// </summary>
+        public static bool operator !=(InputBinding left, InputBinding right)
+        {
+            return !left.Equals(right);
+        }
     }
 
     class InputBindingConverter : TypeConverter
@@ -522,5 +557,27 @@ namespace FlaxEditor.Options
 
             return false;
         }
+
+        /// <summary>
+        /// Invokes a specific binding.
+        /// </summary>
+        /// <param name="editor">The editor instance.</param>
+        /// <param name="binding">The binding to execute.</param>
+        /// <returns>True if event has been handled, otherwise false.</returns>
+        public bool Invoke(Editor editor, InputBinding binding)
+        {
+            if (binding == new InputBinding())
+                return false;
+            var options = editor.Options.Options.Input;
+            for (int i = 0; i < Bindings.Count; i++)
+            {
+                if (Bindings[i].Binder(options) == binding)
+                {
+                    Bindings[i].Callback();
+                    return true;
+                }
+            }
+            return false;
+        }
     }
 }

Source/Editor/Options/InputOptions.cs

@@ -7,6 +7,32 @@ using FlaxEngine;
 
 namespace FlaxEditor.Options
 {
+    /// <summary>
+    /// Action to perform when a Scene Node receive a double mouse left click.
+    /// </summary>
+    public enum SceneNodeDoubleClick
+    {
+        /// <summary>
+        /// Toggles expand/state of the node.
+        /// </summary>
+        Expand,
+
+        /// <summary>
+        /// Rename the node.
+        /// </summary>
+        RenameActor,
+
+        /// <summary>
+        /// Focus the object in the viewport.
+        /// </summary>
+        FocusActor,
+
+        /// <summary>
+        /// If possible, open the scene node in an associated Editor (eg. Prefab Editor).
+        /// </summary>
+        OpenPrefab,
+    }
+
     /// <summary>
     /// Input editor options data container.
     /// </summary>
@@ -344,9 +370,10 @@ namespace FlaxEditor.Options
         [EditorDisplay("Interface"), EditorOrder(2020)]
         public InputBinding PreviousTab = new InputBinding(KeyboardKeys.Tab, KeyboardKeys.Control, KeyboardKeys.Shift);
 
-        [DefaultValue(Windows.SceneNodeDoubleClick.None)]
+        [DefaultValue(SceneNodeDoubleClick.None)]
         [EditorDisplay("Interface"), EditorOrder(2030)]
-        public Windows.SceneNodeDoubleClick DoubleClickSceneNode = Windows.SceneNodeDoubleClick.None;
+        public SceneNodeDoubleClick DoubleClickSceneNode = SceneNodeDoubleClick.None;
+
         #endregion
     }
 }