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Input system/cache properties #2370

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dfb3a1e
Fixing a fixme comment
josepmariapujol-unity Mar 9, 2026
4ba9b54
Update InputSystem.cs
josepmariapujol-unity Mar 9, 2026
a05ace5
Update PlayerInputManagerEditor.cs
josepmariapujol-unity Mar 9, 2026
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1 change: 1 addition & 0 deletions Packages/com.unity.inputsystem/InputSystem/InputSystem.cs
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Expand Up @@ -10,6 +10,7 @@
using UnityEngine.InputSystem.DualShock;
using UnityEngine.InputSystem.EnhancedTouch;
using UnityEngine.InputSystem.HID;
using UnityEngine.InputSystem.UI;
using UnityEngine.InputSystem.Users;
using UnityEngine.InputSystem.XInput;
using UnityEngine.InputSystem.Utilities;
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109 changes: 62 additions & 47 deletions Packages/com.unity.inputsystem/InputSystem/Plugins/PlayerInput/PlayerInputManagerEditor.cs
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Expand Up @@ -15,6 +15,23 @@
public void OnEnable()
{
InputUser.onChange += OnUserChange;
CacheProperties();
}

private void CacheProperties()
{
m_NotificationBehaviorProperty = serializedObject.FindProperty(nameof(PlayerInputManager.m_NotificationBehavior));
m_PlayerJoinedEventProperty = serializedObject.FindProperty(nameof(PlayerInputManager.m_PlayerJoinedEvent));
m_PlayerLeftEventProperty = serializedObject.FindProperty(nameof(PlayerInputManager.m_PlayerLeftEvent));
m_JoinBehaviorProperty = serializedObject.FindProperty(nameof(PlayerInputManager.m_JoinBehavior));
m_JoinActionProperty = serializedObject.FindProperty(nameof(PlayerInputManager.m_JoinAction));
m_PlayerPrefabProperty = serializedObject.FindProperty(nameof(PlayerInputManager.m_PlayerPrefab));
m_AllowJoiningProperty = serializedObject.FindProperty(nameof(PlayerInputManager.m_AllowJoining));
m_MaxPlayerCountProperty = serializedObject.FindProperty(nameof(PlayerInputManager.m_MaxPlayerCount));
m_SplitScreenProperty = serializedObject.FindProperty(nameof(PlayerInputManager.m_SplitScreen));
m_MaintainAspectRatioProperty = serializedObject.FindProperty(nameof(PlayerInputManager.m_MaintainAspectRatioInSplitScreen));
m_FixedNumberOfSplitScreensProperty = serializedObject.FindProperty(nameof(PlayerInputManager.m_FixedNumberOfSplitScreens));
m_SplitScreenRectProperty = serializedObject.FindProperty(nameof(PlayerInputManager.m_SplitScreenRect));
}

public void OnDisable()
Expand All @@ -35,8 +52,6 @@

public override void OnInspectorGUI()
{
////TODO: cache properties

EditorGUI.BeginChangeCheck();

DoNotificationSectionUI();
Expand All @@ -54,9 +69,8 @@

private void DoNotificationSectionUI()
{
var notificationBehaviorProperty = serializedObject.FindProperty(nameof(PlayerInputManager.m_NotificationBehavior));
EditorGUILayout.PropertyField(notificationBehaviorProperty);
switch ((PlayerNotifications)notificationBehaviorProperty.intValue)
EditorGUILayout.PropertyField(m_NotificationBehaviorProperty);
switch ((PlayerNotifications)m_NotificationBehaviorProperty.intValue)

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{
case PlayerNotifications.SendMessages:
if (m_SendMessagesHelpText == null)
Expand All @@ -76,11 +90,8 @@
m_EventsExpanded = EditorGUILayout.Foldout(m_EventsExpanded, m_EventsLabel, toggleOnLabelClick: true);
if (m_EventsExpanded)
{
var playerJoinedEventProperty = serializedObject.FindProperty(nameof(PlayerInputManager.m_PlayerJoinedEvent));
var playerLeftEventProperty = serializedObject.FindProperty(nameof(PlayerInputManager.m_PlayerLeftEvent));

EditorGUILayout.PropertyField(playerJoinedEventProperty);
EditorGUILayout.PropertyField(playerLeftEventProperty);
EditorGUILayout.PropertyField(m_PlayerJoinedEventProperty);
EditorGUILayout.PropertyField(m_PlayerLeftEventProperty);

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}
break;
}
Expand All @@ -91,52 +102,47 @@
EditorGUILayout.LabelField(m_JoiningGroupLabel, EditorStyles.boldLabel);

// Join behavior
var joinBehaviorProperty = serializedObject.FindProperty(nameof(PlayerInputManager.m_JoinBehavior));
EditorGUILayout.PropertyField(joinBehaviorProperty);
if ((PlayerJoinBehavior)joinBehaviorProperty.intValue != PlayerJoinBehavior.JoinPlayersManually)
EditorGUILayout.PropertyField(m_JoinBehaviorProperty);
if ((PlayerJoinBehavior)m_JoinBehaviorProperty.intValue != PlayerJoinBehavior.JoinPlayersManually)

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{
++EditorGUI.indentLevel;

// Join action.
if ((PlayerJoinBehavior)joinBehaviorProperty.intValue ==
if ((PlayerJoinBehavior)m_JoinBehaviorProperty.intValue ==

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PlayerJoinBehavior.JoinPlayersWhenJoinActionIsTriggered)
{
var joinActionProperty = serializedObject.FindProperty(nameof(PlayerInputManager.m_JoinAction));
EditorGUILayout.PropertyField(joinActionProperty);
EditorGUILayout.PropertyField(m_JoinActionProperty);

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}

// Player prefab.
var playerPrefabProperty = serializedObject.FindProperty(nameof(PlayerInputManager.m_PlayerPrefab));
EditorGUILayout.PropertyField(playerPrefabProperty);
EditorGUILayout.PropertyField(m_PlayerPrefabProperty);

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ValidatePlayerPrefab(joinBehaviorProperty, playerPrefabProperty);
ValidatePlayerPrefab(m_JoinBehaviorProperty, m_PlayerPrefabProperty);

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--EditorGUI.indentLevel;
}

// Enabled-by-default.
var allowJoiningProperty = serializedObject.FindProperty(nameof(PlayerInputManager.m_AllowJoining));
if (m_AllowingJoiningLabel == null)
m_AllowingJoiningLabel = new GUIContent("Joining Enabled By Default", allowJoiningProperty.GetTooltip());
EditorGUILayout.PropertyField(allowJoiningProperty, m_AllowingJoiningLabel);
m_AllowingJoiningLabel = new GUIContent("Joining Enabled By Default", m_AllowJoiningProperty.GetTooltip());
EditorGUILayout.PropertyField(m_AllowJoiningProperty, m_AllowingJoiningLabel);

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// Max player count.
var maxPlayerCountProperty = serializedObject.FindProperty(nameof(PlayerInputManager.m_MaxPlayerCount));
if (m_EnableMaxPlayerCountLabel == null)
m_EnableMaxPlayerCountLabel = EditorGUIUtility.TrTextContent("Limit Number of Players", maxPlayerCountProperty.GetTooltip());
if (maxPlayerCountProperty.intValue > 0)
m_EnableMaxPlayerCountLabel = EditorGUIUtility.TrTextContent("Limit Number of Players", m_MaxPlayerCountProperty.GetTooltip());
if (m_MaxPlayerCountProperty.intValue > 0)

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m_MaxPlayerCountEnabled = true;
m_MaxPlayerCountEnabled = EditorGUILayout.Toggle(m_EnableMaxPlayerCountLabel, m_MaxPlayerCountEnabled);
if (m_MaxPlayerCountEnabled)
{
++EditorGUI.indentLevel;
if (maxPlayerCountProperty.intValue < 0)
maxPlayerCountProperty.intValue = 1;
EditorGUILayout.PropertyField(maxPlayerCountProperty);
if (m_MaxPlayerCountProperty.intValue < 0)
m_MaxPlayerCountProperty.intValue = 1;
EditorGUILayout.PropertyField(m_MaxPlayerCountProperty);

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--EditorGUI.indentLevel;
}
else
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importance-medium

Assigning a value to m_MaxPlayerCountProperty.intValue inside the else block of OnInspectorGUI will result in an unconditional write to the serialized property on every GUI event (Layout, Repaint, etc.) whenever the toggle is disabled. This can cause the SerializedObject to be marked dirty unnecessarily and may interfere with the Undo system or performance in large scenes. Consider wrapping this assignment in a check to see if the value is already -1, or perform the assignment only when m_MaxPlayerCountEnabled changes.

🤖 Helpful? 👍/👎

maxPlayerCountProperty.intValue = -1;
m_MaxPlayerCountProperty.intValue = -1;

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}

private static void ValidatePlayerPrefab(SerializedProperty joinBehaviorProperty,
Expand Down Expand Up @@ -174,51 +180,47 @@
EditorGUILayout.LabelField(m_SplitScreenGroupLabel, EditorStyles.boldLabel);

// Split-screen toggle.
var splitScreenProperty = serializedObject.FindProperty(nameof(PlayerInputManager.m_SplitScreen));
if (m_SplitScreenLabel == null)
m_SplitScreenLabel = new GUIContent("Enable Split-Screen", splitScreenProperty.GetTooltip());
EditorGUILayout.PropertyField(splitScreenProperty, m_SplitScreenLabel);
if (!splitScreenProperty.boolValue)
m_SplitScreenLabel = new GUIContent("Enable Split-Screen", m_SplitScreenProperty.GetTooltip());
EditorGUILayout.PropertyField(m_SplitScreenProperty, m_SplitScreenLabel);
if (!m_SplitScreenProperty.boolValue)

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return;

++EditorGUI.indentLevel;

// Maintain-aspect-ratio toggle.
var maintainAspectRatioProperty = serializedObject.FindProperty(nameof(PlayerInputManager.m_MaintainAspectRatioInSplitScreen));
if (m_MaintainAspectRatioLabel == null)
m_MaintainAspectRatioLabel =
new GUIContent("Maintain Aspect Ratio", maintainAspectRatioProperty.GetTooltip());
EditorGUILayout.PropertyField(maintainAspectRatioProperty, m_MaintainAspectRatioLabel);
new GUIContent("Maintain Aspect Ratio", m_MaintainAspectRatioProperty.GetTooltip());
EditorGUILayout.PropertyField(m_MaintainAspectRatioProperty, m_MaintainAspectRatioLabel);

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// Fixed-number toggle.
var fixedNumberProperty = serializedObject.FindProperty(nameof(PlayerInputManager.m_FixedNumberOfSplitScreens));
if (m_EnableFixedNumberOfSplitScreensLabel == null)
m_EnableFixedNumberOfSplitScreensLabel = EditorGUIUtility.TrTextContent("Set Fixed Number", fixedNumberProperty.GetTooltip());
if (fixedNumberProperty.intValue > 0)
m_EnableFixedNumberOfSplitScreensLabel = EditorGUIUtility.TrTextContent("Set Fixed Number", m_FixedNumberOfSplitScreensProperty.GetTooltip());
if (m_FixedNumberOfSplitScreensProperty.intValue > 0)

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m_FixedNumberOfSplitScreensEnabled = true;
m_FixedNumberOfSplitScreensEnabled = EditorGUILayout.Toggle(m_EnableFixedNumberOfSplitScreensLabel,
m_FixedNumberOfSplitScreensEnabled);
if (m_FixedNumberOfSplitScreensEnabled)
{
++EditorGUI.indentLevel;
if (fixedNumberProperty.intValue < 0)
fixedNumberProperty.intValue = 4;
if (m_FixedNumberOfSplitScreensProperty.intValue < 0)
m_FixedNumberOfSplitScreensProperty.intValue = 4;

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if (m_FixedNumberOfSplitScreensLabel == null)
m_FixedNumberOfSplitScreensLabel = EditorGUIUtility.TrTextContent("Number of Screens",
fixedNumberProperty.tooltip);
EditorGUILayout.PropertyField(fixedNumberProperty, m_FixedNumberOfSplitScreensLabel);
m_FixedNumberOfSplitScreensProperty.tooltip);
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importance-low

There is an inconsistency in how tooltips are accessed. On line 199, GetTooltip() is used, while here .tooltip is accessed directly. It is generally recommended to stick to one method (likely GetTooltip() if it handles fallbacks or version compatibility) to ensure consistent behavior across the editor.

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EditorGUILayout.PropertyField(m_FixedNumberOfSplitScreensProperty, m_FixedNumberOfSplitScreensLabel);

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--EditorGUI.indentLevel;
}
else
{
fixedNumberProperty.intValue = -1;
m_FixedNumberOfSplitScreensProperty.intValue = -1;

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importance-medium

Similar to the m_MaxPlayerCountProperty assignment, this unconditionally sets the property value to -1 on every repaint when m_FixedNumberOfSplitScreensEnabled is false. This should ideally be guarded by a change check or a value comparison to avoid unnecessary dirtiness of the serialized object.

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}

// Split-screen area.
var splitScreenAreaProperty = serializedObject.FindProperty(nameof(PlayerInputManager.m_SplitScreenRect));
if (m_SplitScreenAreaLabel == null)
m_SplitScreenAreaLabel = new GUIContent("Screen Rectangle", splitScreenAreaProperty.GetTooltip());
EditorGUILayout.PropertyField(splitScreenAreaProperty, m_SplitScreenAreaLabel);
m_SplitScreenAreaLabel = new GUIContent("Screen Rectangle", m_SplitScreenRectProperty.GetTooltip());
EditorGUILayout.PropertyField(m_SplitScreenRectProperty, m_SplitScreenAreaLabel);

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--EditorGUI.indentLevel;
}
Expand Down Expand Up @@ -251,6 +253,19 @@
[SerializeField] private bool m_MaxPlayerCountEnabled;
[SerializeField] private bool m_FixedNumberOfSplitScreensEnabled;

[NonSerialized] private SerializedProperty m_NotificationBehaviorProperty;
[NonSerialized] private SerializedProperty m_PlayerJoinedEventProperty;
[NonSerialized] private SerializedProperty m_PlayerLeftEventProperty;
[NonSerialized] private SerializedProperty m_JoinBehaviorProperty;
[NonSerialized] private SerializedProperty m_JoinActionProperty;
[NonSerialized] private SerializedProperty m_PlayerPrefabProperty;
[NonSerialized] private SerializedProperty m_AllowJoiningProperty;
[NonSerialized] private SerializedProperty m_MaxPlayerCountProperty;
[NonSerialized] private SerializedProperty m_SplitScreenProperty;
[NonSerialized] private SerializedProperty m_MaintainAspectRatioProperty;
[NonSerialized] private SerializedProperty m_FixedNumberOfSplitScreensProperty;
[NonSerialized] private SerializedProperty m_SplitScreenRectProperty;
Comment on lines +256 to +267
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importance-low

The [NonSerialized] fields for SerializedProperty are correctly added to avoid serialization overhead. However, since OnEnable caches these, ensure that OnDisable or the class doesn't leak references if the SerializedObject is disposed. While typically handled by Unity's garbage collection for Editor objects, it's a good practice to null them out in OnDisable if the editor lifecycle is complex.

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[NonSerialized] private readonly GUIContent m_JoiningGroupLabel = EditorGUIUtility.TrTextContent("Joining");
[NonSerialized] private readonly GUIContent m_SplitScreenGroupLabel = EditorGUIUtility.TrTextContent("Split-Screen");
[NonSerialized] private readonly GUIContent m_EventsLabel = EditorGUIUtility.TrTextContent("Events");
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31 changes: 16 additions & 15 deletions Packages/com.unity.inputsystem/InputSystem/Plugins/UI/UISupport.cs
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@@ -1,21 +1,22 @@
using UnityEngine.InputSystem;

////FIXME: This should be UnityEngine.InputSystem.UI

#if UNITY_DISABLE_DEFAULT_INPUT_PLUGIN_INITIALIZATION
public
#else
internal
#endif
static class UISupport
namespace UnityEngine.InputSystem.UI
{
public static void Initialize()
#if UNITY_DISABLE_DEFAULT_INPUT_PLUGIN_INITIALIZATION
public
#else
internal
#endif
static class UISupport
{
InputSystem.RegisterLayout(@"
{
""name"" : ""VirtualMouse"",
""extend"" : ""Mouse""
}
");
public static void Initialize()
{
InputSystem.RegisterLayout(@"
{
""name"" : ""VirtualMouse"",
""extend"" : ""Mouse""
}
");
}
}
}
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